Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * linux/drivers/char/pcmcia/synclink_cs.c |
| 3 | * |
Paul Fulghum | a7482a2 | 2005-09-10 00:26:07 -0700 | [diff] [blame] | 4 | * $Id: synclink_cs.c,v 4.34 2005/09/08 13:20:54 paulkf Exp $ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5 | * |
| 6 | * Device driver for Microgate SyncLink PC Card |
| 7 | * multiprotocol serial adapter. |
| 8 | * |
| 9 | * written by Paul Fulghum for Microgate Corporation |
| 10 | * paulkf@microgate.com |
| 11 | * |
| 12 | * Microgate and SyncLink are trademarks of Microgate Corporation |
| 13 | * |
| 14 | * This code is released under the GNU General Public License (GPL) |
| 15 | * |
| 16 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED |
| 17 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| 18 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
| 19 | * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, |
| 20 | * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES |
| 21 | * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR |
| 22 | * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 23 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, |
| 24 | * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| 25 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED |
| 26 | * OF THE POSSIBILITY OF SUCH DAMAGE. |
| 27 | */ |
| 28 | |
| 29 | #define VERSION(ver,rel,seq) (((ver)<<16) | ((rel)<<8) | (seq)) |
| 30 | #if defined(__i386__) |
| 31 | # define BREAKPOINT() asm(" int $3"); |
| 32 | #else |
| 33 | # define BREAKPOINT() { } |
| 34 | #endif |
| 35 | |
| 36 | #define MAX_DEVICE_COUNT 4 |
| 37 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 38 | #include <linux/module.h> |
| 39 | #include <linux/errno.h> |
| 40 | #include <linux/signal.h> |
| 41 | #include <linux/sched.h> |
| 42 | #include <linux/timer.h> |
| 43 | #include <linux/time.h> |
| 44 | #include <linux/interrupt.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 45 | #include <linux/tty.h> |
| 46 | #include <linux/tty_flip.h> |
| 47 | #include <linux/serial.h> |
| 48 | #include <linux/major.h> |
| 49 | #include <linux/string.h> |
| 50 | #include <linux/fcntl.h> |
| 51 | #include <linux/ptrace.h> |
| 52 | #include <linux/ioport.h> |
| 53 | #include <linux/mm.h> |
Alexey Dobriyan | 8768714 | 2009-03-31 15:19:17 -0700 | [diff] [blame] | 54 | #include <linux/seq_file.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 55 | #include <linux/slab.h> |
| 56 | #include <linux/netdevice.h> |
| 57 | #include <linux/vmalloc.h> |
| 58 | #include <linux/init.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 59 | #include <linux/delay.h> |
| 60 | #include <linux/ioctl.h> |
Robert P. J. Day | 3dd1247 | 2008-02-06 01:37:17 -0800 | [diff] [blame] | 61 | #include <linux/synclink.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 62 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 63 | #include <asm/io.h> |
| 64 | #include <asm/irq.h> |
| 65 | #include <asm/dma.h> |
| 66 | #include <linux/bitops.h> |
| 67 | #include <asm/types.h> |
| 68 | #include <linux/termios.h> |
| 69 | #include <linux/workqueue.h> |
| 70 | #include <linux/hdlc.h> |
| 71 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 72 | #include <pcmcia/cistpl.h> |
| 73 | #include <pcmcia/cisreg.h> |
| 74 | #include <pcmcia/ds.h> |
| 75 | |
Paul Fulghum | af69c7f | 2006-12-06 20:40:24 -0800 | [diff] [blame] | 76 | #if defined(CONFIG_HDLC) || (defined(CONFIG_HDLC_MODULE) && defined(CONFIG_SYNCLINK_CS_MODULE)) |
| 77 | #define SYNCLINK_GENERIC_HDLC 1 |
| 78 | #else |
| 79 | #define SYNCLINK_GENERIC_HDLC 0 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 80 | #endif |
| 81 | |
| 82 | #define GET_USER(error,value,addr) error = get_user(value,addr) |
| 83 | #define COPY_FROM_USER(error,dest,src,size) error = copy_from_user(dest,src,size) ? -EFAULT : 0 |
| 84 | #define PUT_USER(error,value,addr) error = put_user(value,addr) |
| 85 | #define COPY_TO_USER(error,dest,src,size) error = copy_to_user(dest,src,size) ? -EFAULT : 0 |
| 86 | |
| 87 | #include <asm/uaccess.h> |
| 88 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 89 | static MGSL_PARAMS default_params = { |
| 90 | MGSL_MODE_HDLC, /* unsigned long mode */ |
| 91 | 0, /* unsigned char loopback; */ |
| 92 | HDLC_FLAG_UNDERRUN_ABORT15, /* unsigned short flags; */ |
| 93 | HDLC_ENCODING_NRZI_SPACE, /* unsigned char encoding; */ |
| 94 | 0, /* unsigned long clock_speed; */ |
| 95 | 0xff, /* unsigned char addr_filter; */ |
| 96 | HDLC_CRC_16_CCITT, /* unsigned short crc_type; */ |
| 97 | HDLC_PREAMBLE_LENGTH_8BITS, /* unsigned char preamble_length; */ |
| 98 | HDLC_PREAMBLE_PATTERN_NONE, /* unsigned char preamble; */ |
| 99 | 9600, /* unsigned long data_rate; */ |
| 100 | 8, /* unsigned char data_bits; */ |
| 101 | 1, /* unsigned char stop_bits; */ |
| 102 | ASYNC_PARITY_NONE /* unsigned char parity; */ |
| 103 | }; |
| 104 | |
Alexey Khoroshilov | 3d55399 | 2013-02-07 01:00:35 +0100 | [diff] [blame] | 105 | typedef struct { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 106 | int count; |
| 107 | unsigned char status; |
| 108 | char data[1]; |
| 109 | } RXBUF; |
| 110 | |
| 111 | /* The queue of BH actions to be performed */ |
| 112 | |
| 113 | #define BH_RECEIVE 1 |
| 114 | #define BH_TRANSMIT 2 |
| 115 | #define BH_STATUS 4 |
| 116 | |
| 117 | #define IO_PIN_SHUTDOWN_LIMIT 100 |
| 118 | |
| 119 | #define RELEVANT_IFLAG(iflag) (iflag & (IGNBRK|BRKINT|IGNPAR|PARMRK|INPCK)) |
| 120 | |
| 121 | struct _input_signal_events { |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 122 | int ri_up; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 123 | int ri_down; |
| 124 | int dsr_up; |
| 125 | int dsr_down; |
| 126 | int dcd_up; |
| 127 | int dcd_down; |
| 128 | int cts_up; |
| 129 | int cts_down; |
| 130 | }; |
| 131 | |
| 132 | |
| 133 | /* |
| 134 | * Device instance data structure |
| 135 | */ |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 136 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 137 | typedef struct _mgslpc_info { |
Alan Cox | eeb4613 | 2009-01-02 13:48:47 +0000 | [diff] [blame] | 138 | struct tty_port port; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 139 | void *if_ptr; /* General purpose pointer (used by SPPP) */ |
| 140 | int magic; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 141 | int line; |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 142 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 143 | struct mgsl_icount icount; |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 144 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 145 | int timeout; |
| 146 | int x_char; /* xon/xoff character */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 147 | unsigned char read_status_mask; |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 148 | unsigned char ignore_status_mask; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 149 | |
| 150 | unsigned char *tx_buf; |
| 151 | int tx_put; |
| 152 | int tx_get; |
| 153 | int tx_count; |
| 154 | |
| 155 | /* circular list of fixed length rx buffers */ |
| 156 | |
| 157 | unsigned char *rx_buf; /* memory allocated for all rx buffers */ |
| 158 | int rx_buf_total_size; /* size of memory allocated for rx buffers */ |
| 159 | int rx_put; /* index of next empty rx buffer */ |
| 160 | int rx_get; /* index of next full rx buffer */ |
| 161 | int rx_buf_size; /* size in bytes of single rx buffer */ |
| 162 | int rx_buf_count; /* total number of rx buffers */ |
| 163 | int rx_frame_count; /* number of full rx buffers */ |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 164 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 165 | wait_queue_head_t status_event_wait_q; |
| 166 | wait_queue_head_t event_wait_q; |
| 167 | struct timer_list tx_timer; /* HDLC transmit timeout timer */ |
| 168 | struct _mgslpc_info *next_device; /* device list link */ |
| 169 | |
| 170 | unsigned short imra_value; |
| 171 | unsigned short imrb_value; |
| 172 | unsigned char pim_value; |
| 173 | |
| 174 | spinlock_t lock; |
| 175 | struct work_struct task; /* task structure for scheduling bh */ |
| 176 | |
| 177 | u32 max_frame_size; |
| 178 | |
| 179 | u32 pending_bh; |
| 180 | |
Joe Perches | 0fab6de | 2008-04-28 02:14:02 -0700 | [diff] [blame] | 181 | bool bh_running; |
| 182 | bool bh_requested; |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 183 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 184 | int dcd_chkcount; /* check counts to prevent */ |
| 185 | int cts_chkcount; /* too many IRQs if a signal */ |
| 186 | int dsr_chkcount; /* is floating */ |
| 187 | int ri_chkcount; |
| 188 | |
Joe Perches | 0fab6de | 2008-04-28 02:14:02 -0700 | [diff] [blame] | 189 | bool rx_enabled; |
| 190 | bool rx_overflow; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 191 | |
Joe Perches | 0fab6de | 2008-04-28 02:14:02 -0700 | [diff] [blame] | 192 | bool tx_enabled; |
| 193 | bool tx_active; |
| 194 | bool tx_aborting; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 195 | u32 idle_mode; |
| 196 | |
| 197 | int if_mode; /* serial interface selection (RS-232, v.35 etc) */ |
| 198 | |
| 199 | char device_name[25]; /* device instance name */ |
| 200 | |
| 201 | unsigned int io_base; /* base I/O address of adapter */ |
| 202 | unsigned int irq_level; |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 203 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 204 | MGSL_PARAMS params; /* communications parameters */ |
| 205 | |
| 206 | unsigned char serial_signals; /* current serial signal states */ |
| 207 | |
Joe Perches | 0fab6de | 2008-04-28 02:14:02 -0700 | [diff] [blame] | 208 | bool irq_occurred; /* for diagnostics use */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 209 | char testing_irq; |
| 210 | unsigned int init_error; /* startup error (DIAGS) */ |
| 211 | |
Paul Fulghum | a6b68a6 | 2012-12-03 11:13:24 -0600 | [diff] [blame] | 212 | char *flag_buf; |
Joe Perches | 0fab6de | 2008-04-28 02:14:02 -0700 | [diff] [blame] | 213 | bool drop_rts_on_tx_done; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 214 | |
| 215 | struct _input_signal_events input_signal_events; |
| 216 | |
| 217 | /* PCMCIA support */ |
Dominik Brodowski | fd23823 | 2006-03-05 10:45:09 +0100 | [diff] [blame] | 218 | struct pcmcia_device *p_dev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 219 | int stop; |
| 220 | |
| 221 | /* SPPP/Cisco HDLC device parts */ |
| 222 | int netcount; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 223 | spinlock_t netlock; |
| 224 | |
Paul Fulghum | af69c7f | 2006-12-06 20:40:24 -0800 | [diff] [blame] | 225 | #if SYNCLINK_GENERIC_HDLC |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 226 | struct net_device *netdev; |
| 227 | #endif |
| 228 | |
| 229 | } MGSLPC_INFO; |
| 230 | |
| 231 | #define MGSLPC_MAGIC 0x5402 |
| 232 | |
| 233 | /* |
| 234 | * The size of the serial xmit buffer is 1 page, or 4096 bytes |
| 235 | */ |
| 236 | #define TXBUFSIZE 4096 |
| 237 | |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 238 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 239 | #define CHA 0x00 /* channel A offset */ |
| 240 | #define CHB 0x40 /* channel B offset */ |
| 241 | |
| 242 | /* |
| 243 | * FIXME: PPC has PVR defined in asm/reg.h. For now we just undef it. |
| 244 | */ |
| 245 | #undef PVR |
| 246 | |
| 247 | #define RXFIFO 0 |
| 248 | #define TXFIFO 0 |
| 249 | #define STAR 0x20 |
| 250 | #define CMDR 0x20 |
| 251 | #define RSTA 0x21 |
| 252 | #define PRE 0x21 |
| 253 | #define MODE 0x22 |
| 254 | #define TIMR 0x23 |
| 255 | #define XAD1 0x24 |
| 256 | #define XAD2 0x25 |
| 257 | #define RAH1 0x26 |
| 258 | #define RAH2 0x27 |
| 259 | #define DAFO 0x27 |
| 260 | #define RAL1 0x28 |
| 261 | #define RFC 0x28 |
| 262 | #define RHCR 0x29 |
| 263 | #define RAL2 0x29 |
| 264 | #define RBCL 0x2a |
| 265 | #define XBCL 0x2a |
| 266 | #define RBCH 0x2b |
| 267 | #define XBCH 0x2b |
| 268 | #define CCR0 0x2c |
| 269 | #define CCR1 0x2d |
| 270 | #define CCR2 0x2e |
| 271 | #define CCR3 0x2f |
| 272 | #define VSTR 0x34 |
| 273 | #define BGR 0x34 |
| 274 | #define RLCR 0x35 |
| 275 | #define AML 0x36 |
| 276 | #define AMH 0x37 |
| 277 | #define GIS 0x38 |
| 278 | #define IVA 0x38 |
| 279 | #define IPC 0x39 |
| 280 | #define ISR 0x3a |
| 281 | #define IMR 0x3a |
| 282 | #define PVR 0x3c |
| 283 | #define PIS 0x3d |
| 284 | #define PIM 0x3d |
| 285 | #define PCR 0x3e |
| 286 | #define CCR4 0x3f |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 287 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 288 | // IMR/ISR |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 289 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 290 | #define IRQ_BREAK_ON BIT15 // rx break detected |
| 291 | #define IRQ_DATAOVERRUN BIT14 // receive data overflow |
| 292 | #define IRQ_ALLSENT BIT13 // all sent |
| 293 | #define IRQ_UNDERRUN BIT12 // transmit data underrun |
| 294 | #define IRQ_TIMER BIT11 // timer interrupt |
| 295 | #define IRQ_CTS BIT10 // CTS status change |
| 296 | #define IRQ_TXREPEAT BIT9 // tx message repeat |
| 297 | #define IRQ_TXFIFO BIT8 // transmit pool ready |
| 298 | #define IRQ_RXEOM BIT7 // receive message end |
| 299 | #define IRQ_EXITHUNT BIT6 // receive frame start |
| 300 | #define IRQ_RXTIME BIT6 // rx char timeout |
| 301 | #define IRQ_DCD BIT2 // carrier detect status change |
| 302 | #define IRQ_OVERRUN BIT1 // receive frame overflow |
| 303 | #define IRQ_RXFIFO BIT0 // receive pool full |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 304 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 305 | // STAR |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 306 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 307 | #define XFW BIT6 // transmit FIFO write enable |
| 308 | #define CEC BIT2 // command executing |
| 309 | #define CTS BIT1 // CTS state |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 310 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 311 | #define PVR_DTR BIT0 |
| 312 | #define PVR_DSR BIT1 |
| 313 | #define PVR_RI BIT2 |
| 314 | #define PVR_AUTOCTS BIT3 |
| 315 | #define PVR_RS232 0x20 /* 0010b */ |
| 316 | #define PVR_V35 0xe0 /* 1110b */ |
| 317 | #define PVR_RS422 0x40 /* 0100b */ |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 318 | |
| 319 | /* Register access functions */ |
| 320 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 321 | #define write_reg(info, reg, val) outb((val),(info)->io_base + (reg)) |
| 322 | #define read_reg(info, reg) inb((info)->io_base + (reg)) |
| 323 | |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 324 | #define read_reg16(info, reg) inw((info)->io_base + (reg)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 325 | #define write_reg16(info, reg, val) outw((val), (info)->io_base + (reg)) |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 326 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 327 | #define set_reg_bits(info, reg, mask) \ |
Alexey Khoroshilov | 3d55399 | 2013-02-07 01:00:35 +0100 | [diff] [blame] | 328 | write_reg(info, (reg), \ |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 329 | (unsigned char) (read_reg(info, (reg)) | (mask))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 330 | #define clear_reg_bits(info, reg, mask) \ |
Alexey Khoroshilov | 3d55399 | 2013-02-07 01:00:35 +0100 | [diff] [blame] | 331 | write_reg(info, (reg), \ |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 332 | (unsigned char) (read_reg(info, (reg)) & ~(mask))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 333 | /* |
| 334 | * interrupt enable/disable routines |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 335 | */ |
| 336 | static void irq_disable(MGSLPC_INFO *info, unsigned char channel, unsigned short mask) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 337 | { |
| 338 | if (channel == CHA) { |
| 339 | info->imra_value |= mask; |
| 340 | write_reg16(info, CHA + IMR, info->imra_value); |
| 341 | } else { |
| 342 | info->imrb_value |= mask; |
| 343 | write_reg16(info, CHB + IMR, info->imrb_value); |
| 344 | } |
| 345 | } |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 346 | static void irq_enable(MGSLPC_INFO *info, unsigned char channel, unsigned short mask) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 347 | { |
| 348 | if (channel == CHA) { |
| 349 | info->imra_value &= ~mask; |
| 350 | write_reg16(info, CHA + IMR, info->imra_value); |
| 351 | } else { |
| 352 | info->imrb_value &= ~mask; |
| 353 | write_reg16(info, CHB + IMR, info->imrb_value); |
| 354 | } |
| 355 | } |
| 356 | |
| 357 | #define port_irq_disable(info, mask) \ |
Alexey Khoroshilov | 3d55399 | 2013-02-07 01:00:35 +0100 | [diff] [blame] | 358 | { info->pim_value |= (mask); write_reg(info, PIM, info->pim_value); } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 359 | |
| 360 | #define port_irq_enable(info, mask) \ |
Alexey Khoroshilov | 3d55399 | 2013-02-07 01:00:35 +0100 | [diff] [blame] | 361 | { info->pim_value &= ~(mask); write_reg(info, PIM, info->pim_value); } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 362 | |
| 363 | static void rx_start(MGSLPC_INFO *info); |
| 364 | static void rx_stop(MGSLPC_INFO *info); |
| 365 | |
Alan Cox | eeb4613 | 2009-01-02 13:48:47 +0000 | [diff] [blame] | 366 | static void tx_start(MGSLPC_INFO *info, struct tty_struct *tty); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 367 | static void tx_stop(MGSLPC_INFO *info); |
| 368 | static void tx_set_idle(MGSLPC_INFO *info); |
| 369 | |
| 370 | static void get_signals(MGSLPC_INFO *info); |
| 371 | static void set_signals(MGSLPC_INFO *info); |
| 372 | |
| 373 | static void reset_device(MGSLPC_INFO *info); |
| 374 | |
| 375 | static void hdlc_mode(MGSLPC_INFO *info); |
| 376 | static void async_mode(MGSLPC_INFO *info); |
| 377 | |
| 378 | static void tx_timeout(unsigned long context); |
| 379 | |
Alan Cox | eeb4613 | 2009-01-02 13:48:47 +0000 | [diff] [blame] | 380 | static int carrier_raised(struct tty_port *port); |
Alan Cox | fcc8ac1 | 2009-06-11 12:24:17 +0100 | [diff] [blame] | 381 | static void dtr_rts(struct tty_port *port, int onoff); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 382 | |
Paul Fulghum | af69c7f | 2006-12-06 20:40:24 -0800 | [diff] [blame] | 383 | #if SYNCLINK_GENERIC_HDLC |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 384 | #define dev_to_port(D) (dev_to_hdlc(D)->priv) |
| 385 | static void hdlcdev_tx_done(MGSLPC_INFO *info); |
| 386 | static void hdlcdev_rx(MGSLPC_INFO *info, char *buf, int size); |
| 387 | static int hdlcdev_init(MGSLPC_INFO *info); |
| 388 | static void hdlcdev_exit(MGSLPC_INFO *info); |
| 389 | #endif |
| 390 | |
| 391 | static void trace_block(MGSLPC_INFO *info,const char* data, int count, int xmit); |
| 392 | |
Joe Perches | 0fab6de | 2008-04-28 02:14:02 -0700 | [diff] [blame] | 393 | static bool register_test(MGSLPC_INFO *info); |
| 394 | static bool irq_test(MGSLPC_INFO *info); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 395 | static int adapter_test(MGSLPC_INFO *info); |
| 396 | |
| 397 | static int claim_resources(MGSLPC_INFO *info); |
| 398 | static void release_resources(MGSLPC_INFO *info); |
Alexey Khoroshilov | d34138d | 2013-02-07 01:00:34 +0100 | [diff] [blame] | 399 | static int mgslpc_add_device(MGSLPC_INFO *info); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 400 | static void mgslpc_remove_device(MGSLPC_INFO *info); |
| 401 | |
Alan Cox | eeb4613 | 2009-01-02 13:48:47 +0000 | [diff] [blame] | 402 | static bool rx_get_frame(MGSLPC_INFO *info, struct tty_struct *tty); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 403 | static void rx_reset_buffers(MGSLPC_INFO *info); |
| 404 | static int rx_alloc_buffers(MGSLPC_INFO *info); |
| 405 | static void rx_free_buffers(MGSLPC_INFO *info); |
| 406 | |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 407 | static irqreturn_t mgslpc_isr(int irq, void *dev_id); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 408 | |
| 409 | /* |
| 410 | * Bottom half interrupt handlers |
| 411 | */ |
David Howells | c402895 | 2006-11-22 14:57:56 +0000 | [diff] [blame] | 412 | static void bh_handler(struct work_struct *work); |
Alan Cox | eeb4613 | 2009-01-02 13:48:47 +0000 | [diff] [blame] | 413 | static void bh_transmit(MGSLPC_INFO *info, struct tty_struct *tty); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 414 | static void bh_status(MGSLPC_INFO *info); |
| 415 | |
| 416 | /* |
| 417 | * ioctl handlers |
| 418 | */ |
Alan Cox | 60b33c1 | 2011-02-14 16:26:14 +0000 | [diff] [blame] | 419 | static int tiocmget(struct tty_struct *tty); |
Alan Cox | 20b9d17 | 2011-02-14 16:26:50 +0000 | [diff] [blame] | 420 | static int tiocmset(struct tty_struct *tty, |
| 421 | unsigned int set, unsigned int clear); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 422 | static int get_stats(MGSLPC_INFO *info, struct mgsl_icount __user *user_icount); |
| 423 | static int get_params(MGSLPC_INFO *info, MGSL_PARAMS __user *user_params); |
Alan Cox | eeb4613 | 2009-01-02 13:48:47 +0000 | [diff] [blame] | 424 | static int set_params(MGSLPC_INFO *info, MGSL_PARAMS __user *new_params, struct tty_struct *tty); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 425 | static int get_txidle(MGSLPC_INFO *info, int __user *idle_mode); |
| 426 | static int set_txidle(MGSLPC_INFO *info, int idle_mode); |
Alan Cox | eeb4613 | 2009-01-02 13:48:47 +0000 | [diff] [blame] | 427 | static int set_txenable(MGSLPC_INFO *info, int enable, struct tty_struct *tty); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 428 | static int tx_abort(MGSLPC_INFO *info); |
| 429 | static int set_rxenable(MGSLPC_INFO *info, int enable); |
| 430 | static int wait_events(MGSLPC_INFO *info, int __user *mask); |
| 431 | |
| 432 | static MGSLPC_INFO *mgslpc_device_list = NULL; |
| 433 | static int mgslpc_device_count = 0; |
| 434 | |
| 435 | /* |
| 436 | * Set this param to non-zero to load eax with the |
| 437 | * .text section address and breakpoint on module load. |
| 438 | * This is useful for use with gdb and add-symbol-file command. |
| 439 | */ |
Shailendra Verma | 208250d | 2015-05-26 01:01:52 +0530 | [diff] [blame] | 440 | static bool break_on_load; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 441 | |
| 442 | /* |
| 443 | * Driver major number, defaults to zero to get auto |
| 444 | * assigned major number. May be forced as module parameter. |
| 445 | */ |
| 446 | static int ttymajor=0; |
| 447 | |
| 448 | static int debug_level = 0; |
| 449 | static int maxframe[MAX_DEVICE_COUNT] = {0,}; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 450 | |
| 451 | module_param(break_on_load, bool, 0); |
| 452 | module_param(ttymajor, int, 0); |
| 453 | module_param(debug_level, int, 0); |
| 454 | module_param_array(maxframe, int, NULL, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 455 | |
| 456 | MODULE_LICENSE("GPL"); |
| 457 | |
| 458 | static char *driver_name = "SyncLink PC Card driver"; |
Paul Fulghum | a7482a2 | 2005-09-10 00:26:07 -0700 | [diff] [blame] | 459 | static char *driver_version = "$Revision: 4.34 $"; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 460 | |
| 461 | static struct tty_driver *serial_driver; |
| 462 | |
| 463 | /* number of characters left in xmit buffer before we ask for more */ |
| 464 | #define WAKEUP_CHARS 256 |
| 465 | |
Alan Cox | eeb4613 | 2009-01-02 13:48:47 +0000 | [diff] [blame] | 466 | static void mgslpc_change_params(MGSLPC_INFO *info, struct tty_struct *tty); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 467 | static void mgslpc_wait_until_sent(struct tty_struct *tty, int timeout); |
| 468 | |
| 469 | /* PCMCIA prototypes */ |
| 470 | |
Dominik Brodowski | 15b99ac | 2006-03-31 17:26:06 +0200 | [diff] [blame] | 471 | static int mgslpc_config(struct pcmcia_device *link); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 472 | static void mgslpc_release(u_long arg); |
Dominik Brodowski | cc3b486 | 2005-11-14 21:23:14 +0100 | [diff] [blame] | 473 | static void mgslpc_detach(struct pcmcia_device *p_dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 474 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 475 | /* |
| 476 | * 1st function defined in .text section. Calling this function in |
| 477 | * init_module() followed by a breakpoint allows a remote debugger |
| 478 | * (gdb) to get the .text address for the add-symbol-file command. |
| 479 | * This allows remote debugging of dynamically loadable modules. |
| 480 | */ |
| 481 | static void* mgslpc_get_text_ptr(void) |
| 482 | { |
| 483 | return mgslpc_get_text_ptr; |
| 484 | } |
| 485 | |
| 486 | /** |
| 487 | * line discipline callback wrappers |
| 488 | * |
| 489 | * The wrappers maintain line discipline references |
| 490 | * while calling into the line discipline. |
| 491 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 492 | * ldisc_receive_buf - pass receive data to line discipline |
| 493 | */ |
| 494 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 495 | static void ldisc_receive_buf(struct tty_struct *tty, |
| 496 | const __u8 *data, char *flags, int count) |
| 497 | { |
| 498 | struct tty_ldisc *ld; |
| 499 | if (!tty) |
| 500 | return; |
| 501 | ld = tty_ldisc_ref(tty); |
| 502 | if (ld) { |
Alan Cox | a352def | 2008-07-16 21:53:12 +0100 | [diff] [blame] | 503 | if (ld->ops->receive_buf) |
| 504 | ld->ops->receive_buf(tty, data, flags, count); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 505 | tty_ldisc_deref(ld); |
| 506 | } |
| 507 | } |
| 508 | |
Alan Cox | eeb4613 | 2009-01-02 13:48:47 +0000 | [diff] [blame] | 509 | static const struct tty_port_operations mgslpc_port_ops = { |
| 510 | .carrier_raised = carrier_raised, |
Alan Cox | fcc8ac1 | 2009-06-11 12:24:17 +0100 | [diff] [blame] | 511 | .dtr_rts = dtr_rts |
Alan Cox | eeb4613 | 2009-01-02 13:48:47 +0000 | [diff] [blame] | 512 | }; |
| 513 | |
Dominik Brodowski | 15b99ac | 2006-03-31 17:26:06 +0200 | [diff] [blame] | 514 | static int mgslpc_probe(struct pcmcia_device *link) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 515 | { |
Alexey Khoroshilov | 3d55399 | 2013-02-07 01:00:35 +0100 | [diff] [blame] | 516 | MGSLPC_INFO *info; |
| 517 | int ret; |
Dominik Brodowski | fd23823 | 2006-03-05 10:45:09 +0100 | [diff] [blame] | 518 | |
Alexey Khoroshilov | 3d55399 | 2013-02-07 01:00:35 +0100 | [diff] [blame] | 519 | if (debug_level >= DEBUG_LEVEL_INFO) |
| 520 | printk("mgslpc_attach\n"); |
Dominik Brodowski | fd23823 | 2006-03-05 10:45:09 +0100 | [diff] [blame] | 521 | |
Alexey Khoroshilov | 3d55399 | 2013-02-07 01:00:35 +0100 | [diff] [blame] | 522 | info = kzalloc(sizeof(MGSLPC_INFO), GFP_KERNEL); |
| 523 | if (!info) { |
| 524 | printk("Error can't allocate device instance data\n"); |
| 525 | return -ENOMEM; |
| 526 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 527 | |
Alexey Khoroshilov | 3d55399 | 2013-02-07 01:00:35 +0100 | [diff] [blame] | 528 | info->magic = MGSLPC_MAGIC; |
| 529 | tty_port_init(&info->port); |
| 530 | info->port.ops = &mgslpc_port_ops; |
| 531 | INIT_WORK(&info->task, bh_handler); |
| 532 | info->max_frame_size = 4096; |
| 533 | info->port.close_delay = 5*HZ/10; |
| 534 | info->port.closing_wait = 30*HZ; |
| 535 | init_waitqueue_head(&info->status_event_wait_q); |
| 536 | init_waitqueue_head(&info->event_wait_q); |
| 537 | spin_lock_init(&info->lock); |
| 538 | spin_lock_init(&info->netlock); |
| 539 | memcpy(&info->params,&default_params,sizeof(MGSL_PARAMS)); |
| 540 | info->idle_mode = HDLC_TXIDLE_FLAGS; |
| 541 | info->imra_value = 0xffff; |
| 542 | info->imrb_value = 0xffff; |
| 543 | info->pim_value = 0xff; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 544 | |
Alexey Khoroshilov | 3d55399 | 2013-02-07 01:00:35 +0100 | [diff] [blame] | 545 | info->p_dev = link; |
| 546 | link->priv = info; |
Dominik Brodowski | fd23823 | 2006-03-05 10:45:09 +0100 | [diff] [blame] | 547 | |
Alexey Khoroshilov | 3d55399 | 2013-02-07 01:00:35 +0100 | [diff] [blame] | 548 | /* Initialize the struct pcmcia_device structure */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 549 | |
Alexey Khoroshilov | 3d55399 | 2013-02-07 01:00:35 +0100 | [diff] [blame] | 550 | ret = mgslpc_config(link); |
| 551 | if (ret != 0) |
| 552 | goto failed; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 553 | |
Alexey Khoroshilov | 3d55399 | 2013-02-07 01:00:35 +0100 | [diff] [blame] | 554 | ret = mgslpc_add_device(info); |
| 555 | if (ret != 0) |
| 556 | goto failed_release; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 557 | |
Alexey Khoroshilov | 3d55399 | 2013-02-07 01:00:35 +0100 | [diff] [blame] | 558 | return 0; |
Alexey Khoroshilov | d34138d | 2013-02-07 01:00:34 +0100 | [diff] [blame] | 559 | |
| 560 | failed_release: |
Alexey Khoroshilov | 3d55399 | 2013-02-07 01:00:35 +0100 | [diff] [blame] | 561 | mgslpc_release((u_long)link); |
Alexey Khoroshilov | d34138d | 2013-02-07 01:00:34 +0100 | [diff] [blame] | 562 | failed: |
Alexey Khoroshilov | 3d55399 | 2013-02-07 01:00:35 +0100 | [diff] [blame] | 563 | tty_port_destroy(&info->port); |
| 564 | kfree(info); |
| 565 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 566 | } |
| 567 | |
| 568 | /* Card has been inserted. |
| 569 | */ |
| 570 | |
Dominik Brodowski | 00990e7 | 2010-07-30 13:13:46 +0200 | [diff] [blame] | 571 | static int mgslpc_ioprobe(struct pcmcia_device *p_dev, void *priv_data) |
Dominik Brodowski | aaa8cfd | 2009-10-18 18:28:39 +0200 | [diff] [blame] | 572 | { |
Dominik Brodowski | 90abdc3 | 2010-07-24 17:23:51 +0200 | [diff] [blame] | 573 | return pcmcia_request_io(p_dev); |
Dominik Brodowski | aaa8cfd | 2009-10-18 18:28:39 +0200 | [diff] [blame] | 574 | } |
| 575 | |
Dominik Brodowski | 15b99ac | 2006-03-31 17:26:06 +0200 | [diff] [blame] | 576 | static int mgslpc_config(struct pcmcia_device *link) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 577 | { |
Alexey Khoroshilov | 3d55399 | 2013-02-07 01:00:35 +0100 | [diff] [blame] | 578 | MGSLPC_INFO *info = link->priv; |
| 579 | int ret; |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 580 | |
Alexey Khoroshilov | 3d55399 | 2013-02-07 01:00:35 +0100 | [diff] [blame] | 581 | if (debug_level >= DEBUG_LEVEL_INFO) |
| 582 | printk("mgslpc_config(0x%p)\n", link); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 583 | |
Alexey Khoroshilov | 3d55399 | 2013-02-07 01:00:35 +0100 | [diff] [blame] | 584 | link->config_flags |= CONF_ENABLE_IRQ | CONF_AUTO_SET_IO; |
Dominik Brodowski | 00990e7 | 2010-07-30 13:13:46 +0200 | [diff] [blame] | 585 | |
Alexey Khoroshilov | 3d55399 | 2013-02-07 01:00:35 +0100 | [diff] [blame] | 586 | ret = pcmcia_loop_config(link, mgslpc_ioprobe, NULL); |
| 587 | if (ret != 0) |
| 588 | goto failed; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 589 | |
Alexey Khoroshilov | 3d55399 | 2013-02-07 01:00:35 +0100 | [diff] [blame] | 590 | link->config_index = 8; |
| 591 | link->config_regs = PRESENT_OPTION; |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 592 | |
Alexey Khoroshilov | 3d55399 | 2013-02-07 01:00:35 +0100 | [diff] [blame] | 593 | ret = pcmcia_request_irq(link, mgslpc_isr); |
| 594 | if (ret) |
| 595 | goto failed; |
| 596 | ret = pcmcia_enable_device(link); |
| 597 | if (ret) |
| 598 | goto failed; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 599 | |
Alexey Khoroshilov | 3d55399 | 2013-02-07 01:00:35 +0100 | [diff] [blame] | 600 | info->io_base = link->resource[0]->start; |
| 601 | info->irq_level = link->irq; |
| 602 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 603 | |
Dominik Brodowski | cbf624f | 2009-10-24 15:47:29 +0200 | [diff] [blame] | 604 | failed: |
Alexey Khoroshilov | 3d55399 | 2013-02-07 01:00:35 +0100 | [diff] [blame] | 605 | mgslpc_release((u_long)link); |
| 606 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 607 | } |
| 608 | |
| 609 | /* Card has been removed. |
| 610 | * Unregister device and release PCMCIA configuration. |
| 611 | * If device is open, postpone until it is closed. |
| 612 | */ |
| 613 | static void mgslpc_release(u_long arg) |
| 614 | { |
Dominik Brodowski | e2d4096 | 2006-03-02 00:09:29 +0100 | [diff] [blame] | 615 | struct pcmcia_device *link = (struct pcmcia_device *)arg; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 616 | |
Dominik Brodowski | e2d4096 | 2006-03-02 00:09:29 +0100 | [diff] [blame] | 617 | if (debug_level >= DEBUG_LEVEL_INFO) |
| 618 | printk("mgslpc_release(0x%p)\n", link); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 619 | |
Dominik Brodowski | e2d4096 | 2006-03-02 00:09:29 +0100 | [diff] [blame] | 620 | pcmcia_disable_device(link); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 621 | } |
| 622 | |
Dominik Brodowski | fba395e | 2006-03-31 17:21:06 +0200 | [diff] [blame] | 623 | static void mgslpc_detach(struct pcmcia_device *link) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 624 | { |
Dominik Brodowski | e2d4096 | 2006-03-02 00:09:29 +0100 | [diff] [blame] | 625 | if (debug_level >= DEBUG_LEVEL_INFO) |
| 626 | printk("mgslpc_detach(0x%p)\n", link); |
Dominik Brodowski | cc3b486 | 2005-11-14 21:23:14 +0100 | [diff] [blame] | 627 | |
Dominik Brodowski | e2d4096 | 2006-03-02 00:09:29 +0100 | [diff] [blame] | 628 | ((MGSLPC_INFO *)link->priv)->stop = 1; |
| 629 | mgslpc_release((u_long)link); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 630 | |
Dominik Brodowski | e2d4096 | 2006-03-02 00:09:29 +0100 | [diff] [blame] | 631 | mgslpc_remove_device((MGSLPC_INFO *)link->priv); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 632 | } |
| 633 | |
Dominik Brodowski | fba395e | 2006-03-31 17:21:06 +0200 | [diff] [blame] | 634 | static int mgslpc_suspend(struct pcmcia_device *link) |
Dominik Brodowski | 98e4c28 | 2005-11-14 21:21:18 +0100 | [diff] [blame] | 635 | { |
Dominik Brodowski | 98e4c28 | 2005-11-14 21:21:18 +0100 | [diff] [blame] | 636 | MGSLPC_INFO *info = link->priv; |
| 637 | |
Dominik Brodowski | 98e4c28 | 2005-11-14 21:21:18 +0100 | [diff] [blame] | 638 | info->stop = 1; |
Dominik Brodowski | 98e4c28 | 2005-11-14 21:21:18 +0100 | [diff] [blame] | 639 | |
| 640 | return 0; |
| 641 | } |
| 642 | |
Dominik Brodowski | fba395e | 2006-03-31 17:21:06 +0200 | [diff] [blame] | 643 | static int mgslpc_resume(struct pcmcia_device *link) |
Dominik Brodowski | 98e4c28 | 2005-11-14 21:21:18 +0100 | [diff] [blame] | 644 | { |
Dominik Brodowski | 98e4c28 | 2005-11-14 21:21:18 +0100 | [diff] [blame] | 645 | MGSLPC_INFO *info = link->priv; |
| 646 | |
Dominik Brodowski | 98e4c28 | 2005-11-14 21:21:18 +0100 | [diff] [blame] | 647 | info->stop = 0; |
| 648 | |
| 649 | return 0; |
| 650 | } |
| 651 | |
| 652 | |
Joe Perches | 0fab6de | 2008-04-28 02:14:02 -0700 | [diff] [blame] | 653 | static inline bool mgslpc_paranoia_check(MGSLPC_INFO *info, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 654 | char *name, const char *routine) |
| 655 | { |
| 656 | #ifdef MGSLPC_PARANOIA_CHECK |
| 657 | static const char *badmagic = |
| 658 | "Warning: bad magic number for mgsl struct (%s) in %s\n"; |
| 659 | static const char *badinfo = |
| 660 | "Warning: null mgslpc_info for (%s) in %s\n"; |
| 661 | |
| 662 | if (!info) { |
| 663 | printk(badinfo, name, routine); |
Joe Perches | 0fab6de | 2008-04-28 02:14:02 -0700 | [diff] [blame] | 664 | return true; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 665 | } |
| 666 | if (info->magic != MGSLPC_MAGIC) { |
| 667 | printk(badmagic, name, routine); |
Joe Perches | 0fab6de | 2008-04-28 02:14:02 -0700 | [diff] [blame] | 668 | return true; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 669 | } |
| 670 | #else |
| 671 | if (!info) |
Joe Perches | 0fab6de | 2008-04-28 02:14:02 -0700 | [diff] [blame] | 672 | return true; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 673 | #endif |
Joe Perches | 0fab6de | 2008-04-28 02:14:02 -0700 | [diff] [blame] | 674 | return false; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 675 | } |
| 676 | |
| 677 | |
| 678 | #define CMD_RXFIFO BIT7 // release current rx FIFO |
| 679 | #define CMD_RXRESET BIT6 // receiver reset |
| 680 | #define CMD_RXFIFO_READ BIT5 |
| 681 | #define CMD_START_TIMER BIT4 |
| 682 | #define CMD_TXFIFO BIT3 // release current tx FIFO |
| 683 | #define CMD_TXEOM BIT1 // transmit end message |
| 684 | #define CMD_TXRESET BIT0 // transmit reset |
| 685 | |
Joe Perches | 0fab6de | 2008-04-28 02:14:02 -0700 | [diff] [blame] | 686 | static bool wait_command_complete(MGSLPC_INFO *info, unsigned char channel) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 687 | { |
| 688 | int i = 0; |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 689 | /* wait for command completion */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 690 | while (read_reg(info, (unsigned char)(channel+STAR)) & BIT2) { |
| 691 | udelay(1); |
| 692 | if (i++ == 1000) |
Joe Perches | 0fab6de | 2008-04-28 02:14:02 -0700 | [diff] [blame] | 693 | return false; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 694 | } |
Joe Perches | 0fab6de | 2008-04-28 02:14:02 -0700 | [diff] [blame] | 695 | return true; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 696 | } |
| 697 | |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 698 | static void issue_command(MGSLPC_INFO *info, unsigned char channel, unsigned char cmd) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 699 | { |
| 700 | wait_command_complete(info, channel); |
| 701 | write_reg(info, (unsigned char) (channel + CMDR), cmd); |
| 702 | } |
| 703 | |
| 704 | static void tx_pause(struct tty_struct *tty) |
| 705 | { |
| 706 | MGSLPC_INFO *info = (MGSLPC_INFO *)tty->driver_data; |
| 707 | unsigned long flags; |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 708 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 709 | if (mgslpc_paranoia_check(info, tty->name, "tx_pause")) |
| 710 | return; |
| 711 | if (debug_level >= DEBUG_LEVEL_INFO) |
Alexey Khoroshilov | 3d55399 | 2013-02-07 01:00:35 +0100 | [diff] [blame] | 712 | printk("tx_pause(%s)\n", info->device_name); |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 713 | |
Alexey Khoroshilov | 3d55399 | 2013-02-07 01:00:35 +0100 | [diff] [blame] | 714 | spin_lock_irqsave(&info->lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 715 | if (info->tx_enabled) |
Alexey Khoroshilov | 3d55399 | 2013-02-07 01:00:35 +0100 | [diff] [blame] | 716 | tx_stop(info); |
| 717 | spin_unlock_irqrestore(&info->lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 718 | } |
| 719 | |
| 720 | static void tx_release(struct tty_struct *tty) |
| 721 | { |
| 722 | MGSLPC_INFO *info = (MGSLPC_INFO *)tty->driver_data; |
| 723 | unsigned long flags; |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 724 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 725 | if (mgslpc_paranoia_check(info, tty->name, "tx_release")) |
| 726 | return; |
| 727 | if (debug_level >= DEBUG_LEVEL_INFO) |
Alexey Khoroshilov | 3d55399 | 2013-02-07 01:00:35 +0100 | [diff] [blame] | 728 | printk("tx_release(%s)\n", info->device_name); |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 729 | |
Alexey Khoroshilov | 3d55399 | 2013-02-07 01:00:35 +0100 | [diff] [blame] | 730 | spin_lock_irqsave(&info->lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 731 | if (!info->tx_enabled) |
Alexey Khoroshilov | 3d55399 | 2013-02-07 01:00:35 +0100 | [diff] [blame] | 732 | tx_start(info, tty); |
| 733 | spin_unlock_irqrestore(&info->lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 734 | } |
| 735 | |
| 736 | /* Return next bottom half action to perform. |
| 737 | * or 0 if nothing to do. |
| 738 | */ |
| 739 | static int bh_action(MGSLPC_INFO *info) |
| 740 | { |
| 741 | unsigned long flags; |
| 742 | int rc = 0; |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 743 | |
Alexey Khoroshilov | 3d55399 | 2013-02-07 01:00:35 +0100 | [diff] [blame] | 744 | spin_lock_irqsave(&info->lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 745 | |
| 746 | if (info->pending_bh & BH_RECEIVE) { |
| 747 | info->pending_bh &= ~BH_RECEIVE; |
| 748 | rc = BH_RECEIVE; |
| 749 | } else if (info->pending_bh & BH_TRANSMIT) { |
| 750 | info->pending_bh &= ~BH_TRANSMIT; |
| 751 | rc = BH_TRANSMIT; |
| 752 | } else if (info->pending_bh & BH_STATUS) { |
| 753 | info->pending_bh &= ~BH_STATUS; |
| 754 | rc = BH_STATUS; |
| 755 | } |
| 756 | |
| 757 | if (!rc) { |
| 758 | /* Mark BH routine as complete */ |
Joe Perches | 0fab6de | 2008-04-28 02:14:02 -0700 | [diff] [blame] | 759 | info->bh_running = false; |
| 760 | info->bh_requested = false; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 761 | } |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 762 | |
Alexey Khoroshilov | 3d55399 | 2013-02-07 01:00:35 +0100 | [diff] [blame] | 763 | spin_unlock_irqrestore(&info->lock, flags); |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 764 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 765 | return rc; |
| 766 | } |
| 767 | |
David Howells | c402895 | 2006-11-22 14:57:56 +0000 | [diff] [blame] | 768 | static void bh_handler(struct work_struct *work) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 769 | { |
David Howells | c402895 | 2006-11-22 14:57:56 +0000 | [diff] [blame] | 770 | MGSLPC_INFO *info = container_of(work, MGSLPC_INFO, task); |
Alan Cox | eeb4613 | 2009-01-02 13:48:47 +0000 | [diff] [blame] | 771 | struct tty_struct *tty; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 772 | int action; |
| 773 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 774 | if (debug_level >= DEBUG_LEVEL_BH) |
Alexey Khoroshilov | 3d55399 | 2013-02-07 01:00:35 +0100 | [diff] [blame] | 775 | printk("%s(%d):bh_handler(%s) entry\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 776 | __FILE__,__LINE__,info->device_name); |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 777 | |
Joe Perches | 0fab6de | 2008-04-28 02:14:02 -0700 | [diff] [blame] | 778 | info->bh_running = true; |
Alan Cox | eeb4613 | 2009-01-02 13:48:47 +0000 | [diff] [blame] | 779 | tty = tty_port_tty_get(&info->port); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 780 | |
| 781 | while((action = bh_action(info)) != 0) { |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 782 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 783 | /* Process work item */ |
Alexey Khoroshilov | 3d55399 | 2013-02-07 01:00:35 +0100 | [diff] [blame] | 784 | if (debug_level >= DEBUG_LEVEL_BH) |
| 785 | printk("%s(%d):bh_handler() work item action=%d\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 786 | __FILE__,__LINE__,action); |
| 787 | |
| 788 | switch (action) { |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 789 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 790 | case BH_RECEIVE: |
Alan Cox | eeb4613 | 2009-01-02 13:48:47 +0000 | [diff] [blame] | 791 | while(rx_get_frame(info, tty)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 792 | break; |
| 793 | case BH_TRANSMIT: |
Alan Cox | eeb4613 | 2009-01-02 13:48:47 +0000 | [diff] [blame] | 794 | bh_transmit(info, tty); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 795 | break; |
| 796 | case BH_STATUS: |
| 797 | bh_status(info); |
| 798 | break; |
| 799 | default: |
| 800 | /* unknown work item ID */ |
| 801 | printk("Unknown work item ID=%08X!\n", action); |
| 802 | break; |
| 803 | } |
| 804 | } |
| 805 | |
Alan Cox | eeb4613 | 2009-01-02 13:48:47 +0000 | [diff] [blame] | 806 | tty_kref_put(tty); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 807 | if (debug_level >= DEBUG_LEVEL_BH) |
Alexey Khoroshilov | 3d55399 | 2013-02-07 01:00:35 +0100 | [diff] [blame] | 808 | printk("%s(%d):bh_handler(%s) exit\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 809 | __FILE__,__LINE__,info->device_name); |
| 810 | } |
| 811 | |
Alan Cox | eeb4613 | 2009-01-02 13:48:47 +0000 | [diff] [blame] | 812 | static void bh_transmit(MGSLPC_INFO *info, struct tty_struct *tty) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 813 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 814 | if (debug_level >= DEBUG_LEVEL_BH) |
| 815 | printk("bh_transmit() entry on %s\n", info->device_name); |
| 816 | |
Jiri Slaby | b963a84 | 2007-02-10 01:44:55 -0800 | [diff] [blame] | 817 | if (tty) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 818 | tty_wakeup(tty); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 819 | } |
| 820 | |
Peter Hagervall | cdaad34 | 2006-06-23 02:06:04 -0700 | [diff] [blame] | 821 | static void bh_status(MGSLPC_INFO *info) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 822 | { |
| 823 | info->ri_chkcount = 0; |
| 824 | info->dsr_chkcount = 0; |
| 825 | info->dcd_chkcount = 0; |
| 826 | info->cts_chkcount = 0; |
| 827 | } |
| 828 | |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 829 | /* eom: non-zero = end of frame */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 830 | static void rx_ready_hdlc(MGSLPC_INFO *info, int eom) |
| 831 | { |
| 832 | unsigned char data[2]; |
| 833 | unsigned char fifo_count, read_count, i; |
| 834 | RXBUF *buf = (RXBUF*)(info->rx_buf + (info->rx_put * info->rx_buf_size)); |
| 835 | |
| 836 | if (debug_level >= DEBUG_LEVEL_ISR) |
Alexey Khoroshilov | 3d55399 | 2013-02-07 01:00:35 +0100 | [diff] [blame] | 837 | printk("%s(%d):rx_ready_hdlc(eom=%d)\n", __FILE__, __LINE__, eom); |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 838 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 839 | if (!info->rx_enabled) |
| 840 | return; |
| 841 | |
| 842 | if (info->rx_frame_count >= info->rx_buf_count) { |
| 843 | /* no more free buffers */ |
| 844 | issue_command(info, CHA, CMD_RXRESET); |
| 845 | info->pending_bh |= BH_RECEIVE; |
Joe Perches | 0fab6de | 2008-04-28 02:14:02 -0700 | [diff] [blame] | 846 | info->rx_overflow = true; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 847 | info->icount.buf_overrun++; |
| 848 | return; |
| 849 | } |
| 850 | |
| 851 | if (eom) { |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 852 | /* end of frame, get FIFO count from RBCL register */ |
Alexey Khoroshilov | 3d55399 | 2013-02-07 01:00:35 +0100 | [diff] [blame] | 853 | fifo_count = (unsigned char)(read_reg(info, CHA+RBCL) & 0x1f); |
| 854 | if (fifo_count == 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 855 | fifo_count = 32; |
| 856 | } else |
| 857 | fifo_count = 32; |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 858 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 859 | do { |
| 860 | if (fifo_count == 1) { |
| 861 | read_count = 1; |
| 862 | data[0] = read_reg(info, CHA + RXFIFO); |
| 863 | } else { |
| 864 | read_count = 2; |
| 865 | *((unsigned short *) data) = read_reg16(info, CHA + RXFIFO); |
| 866 | } |
| 867 | fifo_count -= read_count; |
| 868 | if (!fifo_count && eom) |
| 869 | buf->status = data[--read_count]; |
| 870 | |
| 871 | for (i = 0; i < read_count; i++) { |
| 872 | if (buf->count >= info->max_frame_size) { |
| 873 | /* frame too large, reset receiver and reset current buffer */ |
| 874 | issue_command(info, CHA, CMD_RXRESET); |
| 875 | buf->count = 0; |
| 876 | return; |
| 877 | } |
| 878 | *(buf->data + buf->count) = data[i]; |
| 879 | buf->count++; |
| 880 | } |
| 881 | } while (fifo_count); |
| 882 | |
| 883 | if (eom) { |
| 884 | info->pending_bh |= BH_RECEIVE; |
| 885 | info->rx_frame_count++; |
| 886 | info->rx_put++; |
| 887 | if (info->rx_put >= info->rx_buf_count) |
| 888 | info->rx_put = 0; |
| 889 | } |
| 890 | issue_command(info, CHA, CMD_RXFIFO); |
| 891 | } |
| 892 | |
Jiri Slaby | 2e124b4 | 2013-01-03 15:53:06 +0100 | [diff] [blame] | 893 | static void rx_ready_async(MGSLPC_INFO *info, int tcd) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 894 | { |
Jiri Slaby | 227434f | 2013-01-03 15:53:01 +0100 | [diff] [blame] | 895 | struct tty_port *port = &info->port; |
Alan Cox | 33f0f88 | 2006-01-09 20:54:13 -0800 | [diff] [blame] | 896 | unsigned char data, status, flag; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 897 | int fifo_count; |
Alan Cox | 33f0f88 | 2006-01-09 20:54:13 -0800 | [diff] [blame] | 898 | int work = 0; |
Alexey Khoroshilov | 3d55399 | 2013-02-07 01:00:35 +0100 | [diff] [blame] | 899 | struct mgsl_icount *icount = &info->icount; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 900 | |
| 901 | if (tcd) { |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 902 | /* early termination, get FIFO count from RBCL register */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 903 | fifo_count = (unsigned char)(read_reg(info, CHA+RBCL) & 0x1f); |
| 904 | |
| 905 | /* Zero fifo count could mean 0 or 32 bytes available. |
| 906 | * If BIT5 of STAR is set then at least 1 byte is available. |
| 907 | */ |
| 908 | if (!fifo_count && (read_reg(info,CHA+STAR) & BIT5)) |
| 909 | fifo_count = 32; |
| 910 | } else |
| 911 | fifo_count = 32; |
Alan Cox | 33f0f88 | 2006-01-09 20:54:13 -0800 | [diff] [blame] | 912 | |
Jiri Slaby | 227434f | 2013-01-03 15:53:01 +0100 | [diff] [blame] | 913 | tty_buffer_request_room(port, fifo_count); |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 914 | /* Flush received async data to receive data buffer. */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 915 | while (fifo_count) { |
| 916 | data = read_reg(info, CHA + RXFIFO); |
| 917 | status = read_reg(info, CHA + RXFIFO); |
| 918 | fifo_count -= 2; |
| 919 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 920 | icount->rx++; |
Alan Cox | 33f0f88 | 2006-01-09 20:54:13 -0800 | [diff] [blame] | 921 | flag = TTY_NORMAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 922 | |
| 923 | // if no frameing/crc error then save data |
| 924 | // BIT7:parity error |
| 925 | // BIT6:framing error |
| 926 | |
| 927 | if (status & (BIT7 + BIT6)) { |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 928 | if (status & BIT7) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 929 | icount->parity++; |
| 930 | else |
| 931 | icount->frame++; |
| 932 | |
| 933 | /* discard char if tty control flags say so */ |
| 934 | if (status & info->ignore_status_mask) |
| 935 | continue; |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 936 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 937 | status &= info->read_status_mask; |
| 938 | |
| 939 | if (status & BIT7) |
Alan Cox | 33f0f88 | 2006-01-09 20:54:13 -0800 | [diff] [blame] | 940 | flag = TTY_PARITY; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 941 | else if (status & BIT6) |
Alan Cox | 33f0f88 | 2006-01-09 20:54:13 -0800 | [diff] [blame] | 942 | flag = TTY_FRAME; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 943 | } |
Jiri Slaby | 92a19f9 | 2013-01-03 15:53:03 +0100 | [diff] [blame] | 944 | work += tty_insert_flip_char(port, data, flag); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 945 | } |
| 946 | issue_command(info, CHA, CMD_RXFIFO); |
| 947 | |
| 948 | if (debug_level >= DEBUG_LEVEL_ISR) { |
Alan Cox | 33f0f88 | 2006-01-09 20:54:13 -0800 | [diff] [blame] | 949 | printk("%s(%d):rx_ready_async", |
| 950 | __FILE__,__LINE__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 951 | printk("%s(%d):rx=%d brk=%d parity=%d frame=%d overrun=%d\n", |
| 952 | __FILE__,__LINE__,icount->rx,icount->brk, |
| 953 | icount->parity,icount->frame,icount->overrun); |
| 954 | } |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 955 | |
Alan Cox | 33f0f88 | 2006-01-09 20:54:13 -0800 | [diff] [blame] | 956 | if (work) |
Jiri Slaby | 2e124b4 | 2013-01-03 15:53:06 +0100 | [diff] [blame] | 957 | tty_flip_buffer_push(port); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 958 | } |
| 959 | |
| 960 | |
Alan Cox | eeb4613 | 2009-01-02 13:48:47 +0000 | [diff] [blame] | 961 | static void tx_done(MGSLPC_INFO *info, struct tty_struct *tty) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 962 | { |
| 963 | if (!info->tx_active) |
| 964 | return; |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 965 | |
Joe Perches | 0fab6de | 2008-04-28 02:14:02 -0700 | [diff] [blame] | 966 | info->tx_active = false; |
| 967 | info->tx_aborting = false; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 968 | |
| 969 | if (info->params.mode == MGSL_MODE_ASYNC) |
| 970 | return; |
| 971 | |
| 972 | info->tx_count = info->tx_put = info->tx_get = 0; |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 973 | del_timer(&info->tx_timer); |
| 974 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 975 | if (info->drop_rts_on_tx_done) { |
| 976 | get_signals(info); |
| 977 | if (info->serial_signals & SerialSignal_RTS) { |
| 978 | info->serial_signals &= ~SerialSignal_RTS; |
| 979 | set_signals(info); |
| 980 | } |
Joe Perches | 0fab6de | 2008-04-28 02:14:02 -0700 | [diff] [blame] | 981 | info->drop_rts_on_tx_done = false; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 982 | } |
| 983 | |
Paul Fulghum | af69c7f | 2006-12-06 20:40:24 -0800 | [diff] [blame] | 984 | #if SYNCLINK_GENERIC_HDLC |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 985 | if (info->netcount) |
| 986 | hdlcdev_tx_done(info); |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 987 | else |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 988 | #endif |
| 989 | { |
Alexey Khoroshilov | 221b7b5 | 2012-09-15 01:29:37 +0400 | [diff] [blame] | 990 | if (tty && (tty->stopped || tty->hw_stopped)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 991 | tx_stop(info); |
| 992 | return; |
| 993 | } |
| 994 | info->pending_bh |= BH_TRANSMIT; |
| 995 | } |
| 996 | } |
| 997 | |
Alan Cox | eeb4613 | 2009-01-02 13:48:47 +0000 | [diff] [blame] | 998 | static void tx_ready(MGSLPC_INFO *info, struct tty_struct *tty) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 999 | { |
| 1000 | unsigned char fifo_count = 32; |
| 1001 | int c; |
| 1002 | |
| 1003 | if (debug_level >= DEBUG_LEVEL_ISR) |
Alexey Khoroshilov | 3d55399 | 2013-02-07 01:00:35 +0100 | [diff] [blame] | 1004 | printk("%s(%d):tx_ready(%s)\n", __FILE__, __LINE__, info->device_name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1005 | |
| 1006 | if (info->params.mode == MGSL_MODE_HDLC) { |
| 1007 | if (!info->tx_active) |
| 1008 | return; |
| 1009 | } else { |
Alexey Khoroshilov | 221b7b5 | 2012-09-15 01:29:37 +0400 | [diff] [blame] | 1010 | if (tty && (tty->stopped || tty->hw_stopped)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1011 | tx_stop(info); |
| 1012 | return; |
| 1013 | } |
| 1014 | if (!info->tx_count) |
Joe Perches | 0fab6de | 2008-04-28 02:14:02 -0700 | [diff] [blame] | 1015 | info->tx_active = false; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1016 | } |
| 1017 | |
| 1018 | if (!info->tx_count) |
| 1019 | return; |
| 1020 | |
| 1021 | while (info->tx_count && fifo_count) { |
| 1022 | c = min(2, min_t(int, fifo_count, min(info->tx_count, TXBUFSIZE - info->tx_get))); |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 1023 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1024 | if (c == 1) { |
| 1025 | write_reg(info, CHA + TXFIFO, *(info->tx_buf + info->tx_get)); |
| 1026 | } else { |
| 1027 | write_reg16(info, CHA + TXFIFO, |
| 1028 | *((unsigned short*)(info->tx_buf + info->tx_get))); |
| 1029 | } |
| 1030 | info->tx_count -= c; |
| 1031 | info->tx_get = (info->tx_get + c) & (TXBUFSIZE - 1); |
| 1032 | fifo_count -= c; |
| 1033 | } |
| 1034 | |
| 1035 | if (info->params.mode == MGSL_MODE_ASYNC) { |
| 1036 | if (info->tx_count < WAKEUP_CHARS) |
| 1037 | info->pending_bh |= BH_TRANSMIT; |
| 1038 | issue_command(info, CHA, CMD_TXFIFO); |
| 1039 | } else { |
| 1040 | if (info->tx_count) |
| 1041 | issue_command(info, CHA, CMD_TXFIFO); |
| 1042 | else |
| 1043 | issue_command(info, CHA, CMD_TXFIFO + CMD_TXEOM); |
| 1044 | } |
| 1045 | } |
| 1046 | |
Alan Cox | eeb4613 | 2009-01-02 13:48:47 +0000 | [diff] [blame] | 1047 | static void cts_change(MGSLPC_INFO *info, struct tty_struct *tty) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1048 | { |
| 1049 | get_signals(info); |
| 1050 | if ((info->cts_chkcount)++ >= IO_PIN_SHUTDOWN_LIMIT) |
| 1051 | irq_disable(info, CHB, IRQ_CTS); |
| 1052 | info->icount.cts++; |
| 1053 | if (info->serial_signals & SerialSignal_CTS) |
| 1054 | info->input_signal_events.cts_up++; |
| 1055 | else |
| 1056 | info->input_signal_events.cts_down++; |
| 1057 | wake_up_interruptible(&info->status_event_wait_q); |
| 1058 | wake_up_interruptible(&info->event_wait_q); |
| 1059 | |
Linus Torvalds | 3498d13 | 2012-10-01 12:26:52 -0700 | [diff] [blame] | 1060 | if (tty && tty_port_cts_enabled(&info->port)) { |
Alan Cox | eeb4613 | 2009-01-02 13:48:47 +0000 | [diff] [blame] | 1061 | if (tty->hw_stopped) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1062 | if (info->serial_signals & SerialSignal_CTS) { |
| 1063 | if (debug_level >= DEBUG_LEVEL_ISR) |
| 1064 | printk("CTS tx start..."); |
Alexey Khoroshilov | 221b7b5 | 2012-09-15 01:29:37 +0400 | [diff] [blame] | 1065 | tty->hw_stopped = 0; |
Alan Cox | eeb4613 | 2009-01-02 13:48:47 +0000 | [diff] [blame] | 1066 | tx_start(info, tty); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1067 | info->pending_bh |= BH_TRANSMIT; |
| 1068 | return; |
| 1069 | } |
| 1070 | } else { |
| 1071 | if (!(info->serial_signals & SerialSignal_CTS)) { |
| 1072 | if (debug_level >= DEBUG_LEVEL_ISR) |
| 1073 | printk("CTS tx stop..."); |
Alexey Khoroshilov | 221b7b5 | 2012-09-15 01:29:37 +0400 | [diff] [blame] | 1074 | tty->hw_stopped = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1075 | tx_stop(info); |
| 1076 | } |
| 1077 | } |
| 1078 | } |
| 1079 | info->pending_bh |= BH_STATUS; |
| 1080 | } |
| 1081 | |
Alan Cox | eeb4613 | 2009-01-02 13:48:47 +0000 | [diff] [blame] | 1082 | static void dcd_change(MGSLPC_INFO *info, struct tty_struct *tty) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1083 | { |
| 1084 | get_signals(info); |
| 1085 | if ((info->dcd_chkcount)++ >= IO_PIN_SHUTDOWN_LIMIT) |
| 1086 | irq_disable(info, CHB, IRQ_DCD); |
| 1087 | info->icount.dcd++; |
| 1088 | if (info->serial_signals & SerialSignal_DCD) { |
| 1089 | info->input_signal_events.dcd_up++; |
| 1090 | } |
| 1091 | else |
| 1092 | info->input_signal_events.dcd_down++; |
Paul Fulghum | af69c7f | 2006-12-06 20:40:24 -0800 | [diff] [blame] | 1093 | #if SYNCLINK_GENERIC_HDLC |
Krzysztof Halasa | fbeff3c | 2006-07-21 14:44:55 -0700 | [diff] [blame] | 1094 | if (info->netcount) { |
| 1095 | if (info->serial_signals & SerialSignal_DCD) |
| 1096 | netif_carrier_on(info->netdev); |
| 1097 | else |
| 1098 | netif_carrier_off(info->netdev); |
| 1099 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1100 | #endif |
| 1101 | wake_up_interruptible(&info->status_event_wait_q); |
| 1102 | wake_up_interruptible(&info->event_wait_q); |
| 1103 | |
Peter Hurley | 2d68655 | 2016-04-09 17:53:23 -0700 | [diff] [blame] | 1104 | if (tty_port_check_carrier(&info->port)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1105 | if (debug_level >= DEBUG_LEVEL_ISR) |
| 1106 | printk("%s CD now %s...", info->device_name, |
| 1107 | (info->serial_signals & SerialSignal_DCD) ? "on" : "off"); |
| 1108 | if (info->serial_signals & SerialSignal_DCD) |
Alan Cox | eeb4613 | 2009-01-02 13:48:47 +0000 | [diff] [blame] | 1109 | wake_up_interruptible(&info->port.open_wait); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1110 | else { |
| 1111 | if (debug_level >= DEBUG_LEVEL_ISR) |
| 1112 | printk("doing serial hangup..."); |
Alan Cox | eeb4613 | 2009-01-02 13:48:47 +0000 | [diff] [blame] | 1113 | if (tty) |
| 1114 | tty_hangup(tty); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1115 | } |
| 1116 | } |
| 1117 | info->pending_bh |= BH_STATUS; |
| 1118 | } |
| 1119 | |
| 1120 | static void dsr_change(MGSLPC_INFO *info) |
| 1121 | { |
| 1122 | get_signals(info); |
| 1123 | if ((info->dsr_chkcount)++ >= IO_PIN_SHUTDOWN_LIMIT) |
| 1124 | port_irq_disable(info, PVR_DSR); |
| 1125 | info->icount.dsr++; |
| 1126 | if (info->serial_signals & SerialSignal_DSR) |
| 1127 | info->input_signal_events.dsr_up++; |
| 1128 | else |
| 1129 | info->input_signal_events.dsr_down++; |
| 1130 | wake_up_interruptible(&info->status_event_wait_q); |
| 1131 | wake_up_interruptible(&info->event_wait_q); |
| 1132 | info->pending_bh |= BH_STATUS; |
| 1133 | } |
| 1134 | |
| 1135 | static void ri_change(MGSLPC_INFO *info) |
| 1136 | { |
| 1137 | get_signals(info); |
| 1138 | if ((info->ri_chkcount)++ >= IO_PIN_SHUTDOWN_LIMIT) |
| 1139 | port_irq_disable(info, PVR_RI); |
| 1140 | info->icount.rng++; |
| 1141 | if (info->serial_signals & SerialSignal_RI) |
| 1142 | info->input_signal_events.ri_up++; |
| 1143 | else |
| 1144 | info->input_signal_events.ri_down++; |
| 1145 | wake_up_interruptible(&info->status_event_wait_q); |
| 1146 | wake_up_interruptible(&info->event_wait_q); |
| 1147 | info->pending_bh |= BH_STATUS; |
| 1148 | } |
| 1149 | |
| 1150 | /* Interrupt service routine entry point. |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 1151 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1152 | * Arguments: |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 1153 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1154 | * irq interrupt number that caused interrupt |
| 1155 | * dev_id device ID supplied during interrupt registration |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1156 | */ |
Jeff Garzik | a6f97b2 | 2007-10-31 05:20:49 -0400 | [diff] [blame] | 1157 | static irqreturn_t mgslpc_isr(int dummy, void *dev_id) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1158 | { |
Jeff Garzik | a6f97b2 | 2007-10-31 05:20:49 -0400 | [diff] [blame] | 1159 | MGSLPC_INFO *info = dev_id; |
Alan Cox | eeb4613 | 2009-01-02 13:48:47 +0000 | [diff] [blame] | 1160 | struct tty_struct *tty; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1161 | unsigned short isr; |
| 1162 | unsigned char gis, pis; |
| 1163 | int count=0; |
| 1164 | |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 1165 | if (debug_level >= DEBUG_LEVEL_ISR) |
Jeff Garzik | a6f97b2 | 2007-10-31 05:20:49 -0400 | [diff] [blame] | 1166 | printk("mgslpc_isr(%d) entry.\n", info->irq_level); |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 1167 | |
Dominik Brodowski | e2d4096 | 2006-03-02 00:09:29 +0100 | [diff] [blame] | 1168 | if (!(info->p_dev->_locked)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1169 | return IRQ_HANDLED; |
| 1170 | |
Alan Cox | eeb4613 | 2009-01-02 13:48:47 +0000 | [diff] [blame] | 1171 | tty = tty_port_tty_get(&info->port); |
| 1172 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1173 | spin_lock(&info->lock); |
| 1174 | |
| 1175 | while ((gis = read_reg(info, CHA + GIS))) { |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 1176 | if (debug_level >= DEBUG_LEVEL_ISR) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1177 | printk("mgslpc_isr %s gis=%04X\n", info->device_name,gis); |
| 1178 | |
| 1179 | if ((gis & 0x70) || count > 1000) { |
| 1180 | printk("synclink_cs:hardware failed or ejected\n"); |
| 1181 | break; |
| 1182 | } |
| 1183 | count++; |
| 1184 | |
Alexandru Juncu | ecda040 | 2013-07-19 11:24:03 +0300 | [diff] [blame] | 1185 | if (gis & (BIT1 | BIT0)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1186 | isr = read_reg16(info, CHB + ISR); |
| 1187 | if (isr & IRQ_DCD) |
Alan Cox | eeb4613 | 2009-01-02 13:48:47 +0000 | [diff] [blame] | 1188 | dcd_change(info, tty); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1189 | if (isr & IRQ_CTS) |
Alan Cox | eeb4613 | 2009-01-02 13:48:47 +0000 | [diff] [blame] | 1190 | cts_change(info, tty); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1191 | } |
Alexandru Juncu | ecda040 | 2013-07-19 11:24:03 +0300 | [diff] [blame] | 1192 | if (gis & (BIT3 | BIT2)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1193 | { |
| 1194 | isr = read_reg16(info, CHA + ISR); |
| 1195 | if (isr & IRQ_TIMER) { |
Joe Perches | 0fab6de | 2008-04-28 02:14:02 -0700 | [diff] [blame] | 1196 | info->irq_occurred = true; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1197 | irq_disable(info, CHA, IRQ_TIMER); |
| 1198 | } |
| 1199 | |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 1200 | /* receive IRQs */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1201 | if (isr & IRQ_EXITHUNT) { |
| 1202 | info->icount.exithunt++; |
| 1203 | wake_up_interruptible(&info->event_wait_q); |
| 1204 | } |
| 1205 | if (isr & IRQ_BREAK_ON) { |
| 1206 | info->icount.brk++; |
Alan Cox | eeb4613 | 2009-01-02 13:48:47 +0000 | [diff] [blame] | 1207 | if (info->port.flags & ASYNC_SAK) |
| 1208 | do_SAK(tty); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1209 | } |
| 1210 | if (isr & IRQ_RXTIME) { |
| 1211 | issue_command(info, CHA, CMD_RXFIFO_READ); |
| 1212 | } |
Alexandru Juncu | ecda040 | 2013-07-19 11:24:03 +0300 | [diff] [blame] | 1213 | if (isr & (IRQ_RXEOM | IRQ_RXFIFO)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1214 | if (info->params.mode == MGSL_MODE_HDLC) |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 1215 | rx_ready_hdlc(info, isr & IRQ_RXEOM); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1216 | else |
Jiri Slaby | 2e124b4 | 2013-01-03 15:53:06 +0100 | [diff] [blame] | 1217 | rx_ready_async(info, isr & IRQ_RXEOM); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1218 | } |
| 1219 | |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 1220 | /* transmit IRQs */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1221 | if (isr & IRQ_UNDERRUN) { |
| 1222 | if (info->tx_aborting) |
| 1223 | info->icount.txabort++; |
| 1224 | else |
| 1225 | info->icount.txunder++; |
Alan Cox | eeb4613 | 2009-01-02 13:48:47 +0000 | [diff] [blame] | 1226 | tx_done(info, tty); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1227 | } |
| 1228 | else if (isr & IRQ_ALLSENT) { |
| 1229 | info->icount.txok++; |
Alan Cox | eeb4613 | 2009-01-02 13:48:47 +0000 | [diff] [blame] | 1230 | tx_done(info, tty); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1231 | } |
| 1232 | else if (isr & IRQ_TXFIFO) |
Alan Cox | eeb4613 | 2009-01-02 13:48:47 +0000 | [diff] [blame] | 1233 | tx_ready(info, tty); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1234 | } |
| 1235 | if (gis & BIT7) { |
| 1236 | pis = read_reg(info, CHA + PIS); |
| 1237 | if (pis & BIT1) |
| 1238 | dsr_change(info); |
| 1239 | if (pis & BIT2) |
| 1240 | ri_change(info); |
| 1241 | } |
| 1242 | } |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 1243 | |
| 1244 | /* Request bottom half processing if there's something |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1245 | * for it to do and the bh is not already running |
| 1246 | */ |
| 1247 | |
| 1248 | if (info->pending_bh && !info->bh_running && !info->bh_requested) { |
Alexey Khoroshilov | 3d55399 | 2013-02-07 01:00:35 +0100 | [diff] [blame] | 1249 | if (debug_level >= DEBUG_LEVEL_ISR) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1250 | printk("%s(%d):%s queueing bh task.\n", |
| 1251 | __FILE__,__LINE__,info->device_name); |
| 1252 | schedule_work(&info->task); |
Joe Perches | 0fab6de | 2008-04-28 02:14:02 -0700 | [diff] [blame] | 1253 | info->bh_requested = true; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1254 | } |
| 1255 | |
| 1256 | spin_unlock(&info->lock); |
Alan Cox | eeb4613 | 2009-01-02 13:48:47 +0000 | [diff] [blame] | 1257 | tty_kref_put(tty); |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 1258 | |
| 1259 | if (debug_level >= DEBUG_LEVEL_ISR) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1260 | printk("%s(%d):mgslpc_isr(%d)exit.\n", |
Jeff Garzik | a6f97b2 | 2007-10-31 05:20:49 -0400 | [diff] [blame] | 1261 | __FILE__, __LINE__, info->irq_level); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1262 | |
| 1263 | return IRQ_HANDLED; |
| 1264 | } |
| 1265 | |
| 1266 | /* Initialize and start device. |
| 1267 | */ |
Alan Cox | eeb4613 | 2009-01-02 13:48:47 +0000 | [diff] [blame] | 1268 | static int startup(MGSLPC_INFO * info, struct tty_struct *tty) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1269 | { |
| 1270 | int retval = 0; |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 1271 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1272 | if (debug_level >= DEBUG_LEVEL_INFO) |
Alexey Khoroshilov | 3d55399 | 2013-02-07 01:00:35 +0100 | [diff] [blame] | 1273 | printk("%s(%d):startup(%s)\n", __FILE__, __LINE__, info->device_name); |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 1274 | |
Peter Hurley | d41861c | 2016-04-09 17:53:25 -0700 | [diff] [blame] | 1275 | if (tty_port_initialized(&info->port)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1276 | return 0; |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 1277 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1278 | if (!info->tx_buf) { |
| 1279 | /* allocate a page of memory for a transmit buffer */ |
| 1280 | info->tx_buf = (unsigned char *)get_zeroed_page(GFP_KERNEL); |
| 1281 | if (!info->tx_buf) { |
| 1282 | printk(KERN_ERR"%s(%d):%s can't allocate transmit buffer\n", |
Alexey Khoroshilov | 3d55399 | 2013-02-07 01:00:35 +0100 | [diff] [blame] | 1283 | __FILE__, __LINE__, info->device_name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1284 | return -ENOMEM; |
| 1285 | } |
| 1286 | } |
| 1287 | |
| 1288 | info->pending_bh = 0; |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 1289 | |
Paul Fulghum | a7482a2 | 2005-09-10 00:26:07 -0700 | [diff] [blame] | 1290 | memset(&info->icount, 0, sizeof(info->icount)); |
| 1291 | |
Jiri Slaby | 40565f1 | 2007-02-12 00:52:31 -0800 | [diff] [blame] | 1292 | setup_timer(&info->tx_timer, tx_timeout, (unsigned long)info); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1293 | |
| 1294 | /* Allocate and claim adapter resources */ |
| 1295 | retval = claim_resources(info); |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 1296 | |
Lucas De Marchi | 25985ed | 2011-03-30 22:57:33 -0300 | [diff] [blame] | 1297 | /* perform existence check and diagnostics */ |
Alexey Khoroshilov | 3d55399 | 2013-02-07 01:00:35 +0100 | [diff] [blame] | 1298 | if (!retval) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1299 | retval = adapter_test(info); |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 1300 | |
Alexey Khoroshilov | 3d55399 | 2013-02-07 01:00:35 +0100 | [diff] [blame] | 1301 | if (retval) { |
| 1302 | if (capable(CAP_SYS_ADMIN) && tty) |
Alan Cox | eeb4613 | 2009-01-02 13:48:47 +0000 | [diff] [blame] | 1303 | set_bit(TTY_IO_ERROR, &tty->flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1304 | release_resources(info); |
Alexey Khoroshilov | 3d55399 | 2013-02-07 01:00:35 +0100 | [diff] [blame] | 1305 | return retval; |
| 1306 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1307 | |
| 1308 | /* program hardware for current parameters */ |
Alan Cox | eeb4613 | 2009-01-02 13:48:47 +0000 | [diff] [blame] | 1309 | mgslpc_change_params(info, tty); |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 1310 | |
Alan Cox | eeb4613 | 2009-01-02 13:48:47 +0000 | [diff] [blame] | 1311 | if (tty) |
| 1312 | clear_bit(TTY_IO_ERROR, &tty->flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1313 | |
Peter Hurley | d41861c | 2016-04-09 17:53:25 -0700 | [diff] [blame] | 1314 | tty_port_set_initialized(&info->port, 1); |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 1315 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1316 | return 0; |
| 1317 | } |
| 1318 | |
| 1319 | /* Called by mgslpc_close() and mgslpc_hangup() to shutdown hardware |
| 1320 | */ |
Alan Cox | eeb4613 | 2009-01-02 13:48:47 +0000 | [diff] [blame] | 1321 | static void shutdown(MGSLPC_INFO * info, struct tty_struct *tty) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1322 | { |
| 1323 | unsigned long flags; |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 1324 | |
Peter Hurley | d41861c | 2016-04-09 17:53:25 -0700 | [diff] [blame] | 1325 | if (!tty_port_initialized(&info->port)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1326 | return; |
| 1327 | |
| 1328 | if (debug_level >= DEBUG_LEVEL_INFO) |
| 1329 | printk("%s(%d):mgslpc_shutdown(%s)\n", |
Alexey Khoroshilov | 3d55399 | 2013-02-07 01:00:35 +0100 | [diff] [blame] | 1330 | __FILE__, __LINE__, info->device_name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1331 | |
| 1332 | /* clear status wait queue because status changes */ |
| 1333 | /* can't happen after shutting down the hardware */ |
| 1334 | wake_up_interruptible(&info->status_event_wait_q); |
| 1335 | wake_up_interruptible(&info->event_wait_q); |
| 1336 | |
Jiri Slaby | 40565f1 | 2007-02-12 00:52:31 -0800 | [diff] [blame] | 1337 | del_timer_sync(&info->tx_timer); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1338 | |
| 1339 | if (info->tx_buf) { |
| 1340 | free_page((unsigned long) info->tx_buf); |
| 1341 | info->tx_buf = NULL; |
| 1342 | } |
| 1343 | |
Alexey Khoroshilov | 3d55399 | 2013-02-07 01:00:35 +0100 | [diff] [blame] | 1344 | spin_lock_irqsave(&info->lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1345 | |
| 1346 | rx_stop(info); |
| 1347 | tx_stop(info); |
| 1348 | |
| 1349 | /* TODO:disable interrupts instead of reset to preserve signal states */ |
| 1350 | reset_device(info); |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 1351 | |
Peter Hurley | 9db276f | 2016-01-10 20:36:15 -0800 | [diff] [blame] | 1352 | if (!tty || C_HUPCL(tty)) { |
Joe Perches | 9fe8074 | 2013-01-27 18:21:00 -0800 | [diff] [blame] | 1353 | info->serial_signals &= ~(SerialSignal_RTS | SerialSignal_DTR); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1354 | set_signals(info); |
| 1355 | } |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 1356 | |
Alexey Khoroshilov | 3d55399 | 2013-02-07 01:00:35 +0100 | [diff] [blame] | 1357 | spin_unlock_irqrestore(&info->lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1358 | |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 1359 | release_resources(info); |
| 1360 | |
Alan Cox | eeb4613 | 2009-01-02 13:48:47 +0000 | [diff] [blame] | 1361 | if (tty) |
| 1362 | set_bit(TTY_IO_ERROR, &tty->flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1363 | |
Peter Hurley | d41861c | 2016-04-09 17:53:25 -0700 | [diff] [blame] | 1364 | tty_port_set_initialized(&info->port, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1365 | } |
| 1366 | |
Alan Cox | eeb4613 | 2009-01-02 13:48:47 +0000 | [diff] [blame] | 1367 | static void mgslpc_program_hw(MGSLPC_INFO *info, struct tty_struct *tty) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1368 | { |
| 1369 | unsigned long flags; |
| 1370 | |
Alexey Khoroshilov | 3d55399 | 2013-02-07 01:00:35 +0100 | [diff] [blame] | 1371 | spin_lock_irqsave(&info->lock, flags); |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 1372 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1373 | rx_stop(info); |
| 1374 | tx_stop(info); |
| 1375 | info->tx_count = info->tx_put = info->tx_get = 0; |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 1376 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1377 | if (info->params.mode == MGSL_MODE_HDLC || info->netcount) |
| 1378 | hdlc_mode(info); |
| 1379 | else |
| 1380 | async_mode(info); |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 1381 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1382 | set_signals(info); |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 1383 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1384 | info->dcd_chkcount = 0; |
| 1385 | info->cts_chkcount = 0; |
| 1386 | info->ri_chkcount = 0; |
| 1387 | info->dsr_chkcount = 0; |
| 1388 | |
| 1389 | irq_enable(info, CHB, IRQ_DCD | IRQ_CTS); |
| 1390 | port_irq_enable(info, (unsigned char) PVR_DSR | PVR_RI); |
| 1391 | get_signals(info); |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 1392 | |
Peter Hurley | 9db276f | 2016-01-10 20:36:15 -0800 | [diff] [blame] | 1393 | if (info->netcount || (tty && C_CREAD(tty))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1394 | rx_start(info); |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 1395 | |
Alexey Khoroshilov | 3d55399 | 2013-02-07 01:00:35 +0100 | [diff] [blame] | 1396 | spin_unlock_irqrestore(&info->lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1397 | } |
| 1398 | |
| 1399 | /* Reconfigure adapter based on new parameters |
| 1400 | */ |
Alan Cox | eeb4613 | 2009-01-02 13:48:47 +0000 | [diff] [blame] | 1401 | static void mgslpc_change_params(MGSLPC_INFO *info, struct tty_struct *tty) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1402 | { |
| 1403 | unsigned cflag; |
| 1404 | int bits_per_char; |
| 1405 | |
Alan Cox | 373f5ae | 2012-07-19 12:23:28 +0100 | [diff] [blame] | 1406 | if (!tty) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1407 | return; |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 1408 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1409 | if (debug_level >= DEBUG_LEVEL_INFO) |
| 1410 | printk("%s(%d):mgslpc_change_params(%s)\n", |
Alexey Khoroshilov | 3d55399 | 2013-02-07 01:00:35 +0100 | [diff] [blame] | 1411 | __FILE__, __LINE__, info->device_name); |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 1412 | |
Alan Cox | 373f5ae | 2012-07-19 12:23:28 +0100 | [diff] [blame] | 1413 | cflag = tty->termios.c_cflag; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1414 | |
Joe Perches | 9fe8074 | 2013-01-27 18:21:00 -0800 | [diff] [blame] | 1415 | /* if B0 rate (hangup) specified then negate RTS and DTR */ |
| 1416 | /* otherwise assert RTS and DTR */ |
Alexey Khoroshilov | 3d55399 | 2013-02-07 01:00:35 +0100 | [diff] [blame] | 1417 | if (cflag & CBAUD) |
Joe Perches | 9fe8074 | 2013-01-27 18:21:00 -0800 | [diff] [blame] | 1418 | info->serial_signals |= SerialSignal_RTS | SerialSignal_DTR; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1419 | else |
Joe Perches | 9fe8074 | 2013-01-27 18:21:00 -0800 | [diff] [blame] | 1420 | info->serial_signals &= ~(SerialSignal_RTS | SerialSignal_DTR); |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 1421 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1422 | /* byte size and parity */ |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 1423 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1424 | switch (cflag & CSIZE) { |
| 1425 | case CS5: info->params.data_bits = 5; break; |
| 1426 | case CS6: info->params.data_bits = 6; break; |
| 1427 | case CS7: info->params.data_bits = 7; break; |
| 1428 | case CS8: info->params.data_bits = 8; break; |
| 1429 | default: info->params.data_bits = 7; break; |
| 1430 | } |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 1431 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1432 | if (cflag & CSTOPB) |
| 1433 | info->params.stop_bits = 2; |
| 1434 | else |
| 1435 | info->params.stop_bits = 1; |
| 1436 | |
| 1437 | info->params.parity = ASYNC_PARITY_NONE; |
| 1438 | if (cflag & PARENB) { |
| 1439 | if (cflag & PARODD) |
| 1440 | info->params.parity = ASYNC_PARITY_ODD; |
| 1441 | else |
| 1442 | info->params.parity = ASYNC_PARITY_EVEN; |
| 1443 | #ifdef CMSPAR |
| 1444 | if (cflag & CMSPAR) |
| 1445 | info->params.parity = ASYNC_PARITY_SPACE; |
| 1446 | #endif |
| 1447 | } |
| 1448 | |
| 1449 | /* calculate number of jiffies to transmit a full |
| 1450 | * FIFO (32 bytes) at specified data rate |
| 1451 | */ |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 1452 | bits_per_char = info->params.data_bits + |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1453 | info->params.stop_bits + 1; |
| 1454 | |
| 1455 | /* if port data rate is set to 460800 or less then |
| 1456 | * allow tty settings to override, otherwise keep the |
| 1457 | * current data rate. |
| 1458 | */ |
| 1459 | if (info->params.data_rate <= 460800) { |
Alan Cox | eeb4613 | 2009-01-02 13:48:47 +0000 | [diff] [blame] | 1460 | info->params.data_rate = tty_get_baud_rate(tty); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1461 | } |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 1462 | |
Alexey Khoroshilov | 3d55399 | 2013-02-07 01:00:35 +0100 | [diff] [blame] | 1463 | if (info->params.data_rate) { |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 1464 | info->timeout = (32*HZ*bits_per_char) / |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1465 | info->params.data_rate; |
| 1466 | } |
| 1467 | info->timeout += HZ/50; /* Add .02 seconds of slop */ |
| 1468 | |
Peter Hurley | 5604a98 | 2016-04-09 17:53:21 -0700 | [diff] [blame] | 1469 | tty_port_set_cts_flow(&info->port, cflag & CRTSCTS); |
Peter Hurley | 2d68655 | 2016-04-09 17:53:23 -0700 | [diff] [blame] | 1470 | tty_port_set_check_carrier(&info->port, ~cflag & CLOCAL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1471 | |
| 1472 | /* process tty input control flags */ |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 1473 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1474 | info->read_status_mask = 0; |
Alan Cox | eeb4613 | 2009-01-02 13:48:47 +0000 | [diff] [blame] | 1475 | if (I_INPCK(tty)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1476 | info->read_status_mask |= BIT7 | BIT6; |
Alan Cox | eeb4613 | 2009-01-02 13:48:47 +0000 | [diff] [blame] | 1477 | if (I_IGNPAR(tty)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1478 | info->ignore_status_mask |= BIT7 | BIT6; |
| 1479 | |
Alan Cox | eeb4613 | 2009-01-02 13:48:47 +0000 | [diff] [blame] | 1480 | mgslpc_program_hw(info, tty); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1481 | } |
| 1482 | |
| 1483 | /* Add a character to the transmit buffer |
| 1484 | */ |
Alan Cox | d7e752e | 2008-04-30 00:54:04 -0700 | [diff] [blame] | 1485 | static int mgslpc_put_char(struct tty_struct *tty, unsigned char ch) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1486 | { |
| 1487 | MGSLPC_INFO *info = (MGSLPC_INFO *)tty->driver_data; |
| 1488 | unsigned long flags; |
| 1489 | |
| 1490 | if (debug_level >= DEBUG_LEVEL_INFO) { |
Alexey Khoroshilov | 3d55399 | 2013-02-07 01:00:35 +0100 | [diff] [blame] | 1491 | printk("%s(%d):mgslpc_put_char(%d) on %s\n", |
| 1492 | __FILE__, __LINE__, ch, info->device_name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1493 | } |
| 1494 | |
| 1495 | if (mgslpc_paranoia_check(info, tty->name, "mgslpc_put_char")) |
Alan Cox | d7e752e | 2008-04-30 00:54:04 -0700 | [diff] [blame] | 1496 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1497 | |
Eric Sesterhenn | 326f28e9 | 2006-06-25 05:48:48 -0700 | [diff] [blame] | 1498 | if (!info->tx_buf) |
Alan Cox | d7e752e | 2008-04-30 00:54:04 -0700 | [diff] [blame] | 1499 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1500 | |
Alexey Khoroshilov | 3d55399 | 2013-02-07 01:00:35 +0100 | [diff] [blame] | 1501 | spin_lock_irqsave(&info->lock, flags); |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 1502 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1503 | if (info->params.mode == MGSL_MODE_ASYNC || !info->tx_active) { |
| 1504 | if (info->tx_count < TXBUFSIZE - 1) { |
| 1505 | info->tx_buf[info->tx_put++] = ch; |
| 1506 | info->tx_put &= TXBUFSIZE-1; |
| 1507 | info->tx_count++; |
| 1508 | } |
| 1509 | } |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 1510 | |
Alexey Khoroshilov | 3d55399 | 2013-02-07 01:00:35 +0100 | [diff] [blame] | 1511 | spin_unlock_irqrestore(&info->lock, flags); |
Alan Cox | d7e752e | 2008-04-30 00:54:04 -0700 | [diff] [blame] | 1512 | return 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1513 | } |
| 1514 | |
| 1515 | /* Enable transmitter so remaining characters in the |
| 1516 | * transmit buffer are sent. |
| 1517 | */ |
| 1518 | static void mgslpc_flush_chars(struct tty_struct *tty) |
| 1519 | { |
| 1520 | MGSLPC_INFO *info = (MGSLPC_INFO *)tty->driver_data; |
| 1521 | unsigned long flags; |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 1522 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1523 | if (debug_level >= DEBUG_LEVEL_INFO) |
Alexey Khoroshilov | 3d55399 | 2013-02-07 01:00:35 +0100 | [diff] [blame] | 1524 | printk("%s(%d):mgslpc_flush_chars() entry on %s tx_count=%d\n", |
| 1525 | __FILE__, __LINE__, info->device_name, info->tx_count); |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 1526 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1527 | if (mgslpc_paranoia_check(info, tty->name, "mgslpc_flush_chars")) |
| 1528 | return; |
| 1529 | |
| 1530 | if (info->tx_count <= 0 || tty->stopped || |
| 1531 | tty->hw_stopped || !info->tx_buf) |
| 1532 | return; |
| 1533 | |
| 1534 | if (debug_level >= DEBUG_LEVEL_INFO) |
Alexey Khoroshilov | 3d55399 | 2013-02-07 01:00:35 +0100 | [diff] [blame] | 1535 | printk("%s(%d):mgslpc_flush_chars() entry on %s starting transmitter\n", |
| 1536 | __FILE__, __LINE__, info->device_name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1537 | |
Alexey Khoroshilov | 3d55399 | 2013-02-07 01:00:35 +0100 | [diff] [blame] | 1538 | spin_lock_irqsave(&info->lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1539 | if (!info->tx_active) |
Alexey Khoroshilov | 3d55399 | 2013-02-07 01:00:35 +0100 | [diff] [blame] | 1540 | tx_start(info, tty); |
| 1541 | spin_unlock_irqrestore(&info->lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1542 | } |
| 1543 | |
| 1544 | /* Send a block of data |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 1545 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1546 | * Arguments: |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 1547 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1548 | * tty pointer to tty information structure |
| 1549 | * buf pointer to buffer containing send data |
| 1550 | * count size of send data in bytes |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 1551 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1552 | * Returns: number of characters written |
| 1553 | */ |
| 1554 | static int mgslpc_write(struct tty_struct * tty, |
| 1555 | const unsigned char *buf, int count) |
| 1556 | { |
| 1557 | int c, ret = 0; |
| 1558 | MGSLPC_INFO *info = (MGSLPC_INFO *)tty->driver_data; |
| 1559 | unsigned long flags; |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 1560 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1561 | if (debug_level >= DEBUG_LEVEL_INFO) |
Alexey Khoroshilov | 3d55399 | 2013-02-07 01:00:35 +0100 | [diff] [blame] | 1562 | printk("%s(%d):mgslpc_write(%s) count=%d\n", |
| 1563 | __FILE__, __LINE__, info->device_name, count); |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 1564 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1565 | if (mgslpc_paranoia_check(info, tty->name, "mgslpc_write") || |
Eric Sesterhenn | 326f28e9 | 2006-06-25 05:48:48 -0700 | [diff] [blame] | 1566 | !info->tx_buf) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1567 | goto cleanup; |
| 1568 | |
| 1569 | if (info->params.mode == MGSL_MODE_HDLC) { |
| 1570 | if (count > TXBUFSIZE) { |
| 1571 | ret = -EIO; |
| 1572 | goto cleanup; |
| 1573 | } |
| 1574 | if (info->tx_active) |
| 1575 | goto cleanup; |
| 1576 | else if (info->tx_count) |
| 1577 | goto start; |
| 1578 | } |
| 1579 | |
| 1580 | for (;;) { |
| 1581 | c = min(count, |
| 1582 | min(TXBUFSIZE - info->tx_count - 1, |
| 1583 | TXBUFSIZE - info->tx_put)); |
| 1584 | if (c <= 0) |
| 1585 | break; |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 1586 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1587 | memcpy(info->tx_buf + info->tx_put, buf, c); |
| 1588 | |
Alexey Khoroshilov | 3d55399 | 2013-02-07 01:00:35 +0100 | [diff] [blame] | 1589 | spin_lock_irqsave(&info->lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1590 | info->tx_put = (info->tx_put + c) & (TXBUFSIZE-1); |
| 1591 | info->tx_count += c; |
Alexey Khoroshilov | 3d55399 | 2013-02-07 01:00:35 +0100 | [diff] [blame] | 1592 | spin_unlock_irqrestore(&info->lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1593 | |
| 1594 | buf += c; |
| 1595 | count -= c; |
| 1596 | ret += c; |
| 1597 | } |
| 1598 | start: |
Alexey Khoroshilov | 3d55399 | 2013-02-07 01:00:35 +0100 | [diff] [blame] | 1599 | if (info->tx_count && !tty->stopped && !tty->hw_stopped) { |
| 1600 | spin_lock_irqsave(&info->lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1601 | if (!info->tx_active) |
Alexey Khoroshilov | 3d55399 | 2013-02-07 01:00:35 +0100 | [diff] [blame] | 1602 | tx_start(info, tty); |
| 1603 | spin_unlock_irqrestore(&info->lock, flags); |
| 1604 | } |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 1605 | cleanup: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1606 | if (debug_level >= DEBUG_LEVEL_INFO) |
Alexey Khoroshilov | 3d55399 | 2013-02-07 01:00:35 +0100 | [diff] [blame] | 1607 | printk("%s(%d):mgslpc_write(%s) returning=%d\n", |
| 1608 | __FILE__, __LINE__, info->device_name, ret); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1609 | return ret; |
| 1610 | } |
| 1611 | |
| 1612 | /* Return the count of free bytes in transmit buffer |
| 1613 | */ |
| 1614 | static int mgslpc_write_room(struct tty_struct *tty) |
| 1615 | { |
| 1616 | MGSLPC_INFO *info = (MGSLPC_INFO *)tty->driver_data; |
| 1617 | int ret; |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 1618 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1619 | if (mgslpc_paranoia_check(info, tty->name, "mgslpc_write_room")) |
| 1620 | return 0; |
| 1621 | |
| 1622 | if (info->params.mode == MGSL_MODE_HDLC) { |
| 1623 | /* HDLC (frame oriented) mode */ |
| 1624 | if (info->tx_active) |
| 1625 | return 0; |
| 1626 | else |
| 1627 | return HDLC_MAX_FRAME_SIZE; |
| 1628 | } else { |
| 1629 | ret = TXBUFSIZE - info->tx_count - 1; |
| 1630 | if (ret < 0) |
| 1631 | ret = 0; |
| 1632 | } |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 1633 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1634 | if (debug_level >= DEBUG_LEVEL_INFO) |
| 1635 | printk("%s(%d):mgslpc_write_room(%s)=%d\n", |
Alexey Khoroshilov | 3d55399 | 2013-02-07 01:00:35 +0100 | [diff] [blame] | 1636 | __FILE__, __LINE__, info->device_name, ret); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1637 | return ret; |
| 1638 | } |
| 1639 | |
| 1640 | /* Return the count of bytes in transmit buffer |
| 1641 | */ |
| 1642 | static int mgslpc_chars_in_buffer(struct tty_struct *tty) |
| 1643 | { |
| 1644 | MGSLPC_INFO *info = (MGSLPC_INFO *)tty->driver_data; |
| 1645 | int rc; |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 1646 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1647 | if (debug_level >= DEBUG_LEVEL_INFO) |
| 1648 | printk("%s(%d):mgslpc_chars_in_buffer(%s)\n", |
Alexey Khoroshilov | 3d55399 | 2013-02-07 01:00:35 +0100 | [diff] [blame] | 1649 | __FILE__, __LINE__, info->device_name); |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 1650 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1651 | if (mgslpc_paranoia_check(info, tty->name, "mgslpc_chars_in_buffer")) |
| 1652 | return 0; |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 1653 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1654 | if (info->params.mode == MGSL_MODE_HDLC) |
| 1655 | rc = info->tx_active ? info->max_frame_size : 0; |
| 1656 | else |
| 1657 | rc = info->tx_count; |
| 1658 | |
| 1659 | if (debug_level >= DEBUG_LEVEL_INFO) |
| 1660 | printk("%s(%d):mgslpc_chars_in_buffer(%s)=%d\n", |
Alexey Khoroshilov | 3d55399 | 2013-02-07 01:00:35 +0100 | [diff] [blame] | 1661 | __FILE__, __LINE__, info->device_name, rc); |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 1662 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1663 | return rc; |
| 1664 | } |
| 1665 | |
| 1666 | /* Discard all data in the send buffer |
| 1667 | */ |
| 1668 | static void mgslpc_flush_buffer(struct tty_struct *tty) |
| 1669 | { |
| 1670 | MGSLPC_INFO *info = (MGSLPC_INFO *)tty->driver_data; |
| 1671 | unsigned long flags; |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 1672 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1673 | if (debug_level >= DEBUG_LEVEL_INFO) |
| 1674 | printk("%s(%d):mgslpc_flush_buffer(%s) entry\n", |
Alexey Khoroshilov | 3d55399 | 2013-02-07 01:00:35 +0100 | [diff] [blame] | 1675 | __FILE__, __LINE__, info->device_name); |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 1676 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1677 | if (mgslpc_paranoia_check(info, tty->name, "mgslpc_flush_buffer")) |
| 1678 | return; |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 1679 | |
Alexey Khoroshilov | 3d55399 | 2013-02-07 01:00:35 +0100 | [diff] [blame] | 1680 | spin_lock_irqsave(&info->lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1681 | info->tx_count = info->tx_put = info->tx_get = 0; |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 1682 | del_timer(&info->tx_timer); |
Alexey Khoroshilov | 3d55399 | 2013-02-07 01:00:35 +0100 | [diff] [blame] | 1683 | spin_unlock_irqrestore(&info->lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1684 | |
| 1685 | wake_up_interruptible(&tty->write_wait); |
| 1686 | tty_wakeup(tty); |
| 1687 | } |
| 1688 | |
| 1689 | /* Send a high-priority XON/XOFF character |
| 1690 | */ |
| 1691 | static void mgslpc_send_xchar(struct tty_struct *tty, char ch) |
| 1692 | { |
| 1693 | MGSLPC_INFO *info = (MGSLPC_INFO *)tty->driver_data; |
| 1694 | unsigned long flags; |
| 1695 | |
| 1696 | if (debug_level >= DEBUG_LEVEL_INFO) |
| 1697 | printk("%s(%d):mgslpc_send_xchar(%s,%d)\n", |
Alexey Khoroshilov | 3d55399 | 2013-02-07 01:00:35 +0100 | [diff] [blame] | 1698 | __FILE__, __LINE__, info->device_name, ch); |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 1699 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1700 | if (mgslpc_paranoia_check(info, tty->name, "mgslpc_send_xchar")) |
| 1701 | return; |
| 1702 | |
| 1703 | info->x_char = ch; |
| 1704 | if (ch) { |
Alexey Khoroshilov | 3d55399 | 2013-02-07 01:00:35 +0100 | [diff] [blame] | 1705 | spin_lock_irqsave(&info->lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1706 | if (!info->tx_enabled) |
Alexey Khoroshilov | 3d55399 | 2013-02-07 01:00:35 +0100 | [diff] [blame] | 1707 | tx_start(info, tty); |
| 1708 | spin_unlock_irqrestore(&info->lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1709 | } |
| 1710 | } |
| 1711 | |
| 1712 | /* Signal remote device to throttle send data (our receive data) |
| 1713 | */ |
| 1714 | static void mgslpc_throttle(struct tty_struct * tty) |
| 1715 | { |
| 1716 | MGSLPC_INFO *info = (MGSLPC_INFO *)tty->driver_data; |
| 1717 | unsigned long flags; |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 1718 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1719 | if (debug_level >= DEBUG_LEVEL_INFO) |
| 1720 | printk("%s(%d):mgslpc_throttle(%s) entry\n", |
Alexey Khoroshilov | 3d55399 | 2013-02-07 01:00:35 +0100 | [diff] [blame] | 1721 | __FILE__, __LINE__, info->device_name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1722 | |
| 1723 | if (mgslpc_paranoia_check(info, tty->name, "mgslpc_throttle")) |
| 1724 | return; |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 1725 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1726 | if (I_IXOFF(tty)) |
| 1727 | mgslpc_send_xchar(tty, STOP_CHAR(tty)); |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 1728 | |
Peter Hurley | 9db276f | 2016-01-10 20:36:15 -0800 | [diff] [blame] | 1729 | if (C_CRTSCTS(tty)) { |
Alexey Khoroshilov | 3d55399 | 2013-02-07 01:00:35 +0100 | [diff] [blame] | 1730 | spin_lock_irqsave(&info->lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1731 | info->serial_signals &= ~SerialSignal_RTS; |
Alexey Khoroshilov | 3d55399 | 2013-02-07 01:00:35 +0100 | [diff] [blame] | 1732 | set_signals(info); |
| 1733 | spin_unlock_irqrestore(&info->lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1734 | } |
| 1735 | } |
| 1736 | |
| 1737 | /* Signal remote device to stop throttling send data (our receive data) |
| 1738 | */ |
| 1739 | static void mgslpc_unthrottle(struct tty_struct * tty) |
| 1740 | { |
| 1741 | MGSLPC_INFO *info = (MGSLPC_INFO *)tty->driver_data; |
| 1742 | unsigned long flags; |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 1743 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1744 | if (debug_level >= DEBUG_LEVEL_INFO) |
| 1745 | printk("%s(%d):mgslpc_unthrottle(%s) entry\n", |
Alexey Khoroshilov | 3d55399 | 2013-02-07 01:00:35 +0100 | [diff] [blame] | 1746 | __FILE__, __LINE__, info->device_name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1747 | |
| 1748 | if (mgslpc_paranoia_check(info, tty->name, "mgslpc_unthrottle")) |
| 1749 | return; |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 1750 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1751 | if (I_IXOFF(tty)) { |
| 1752 | if (info->x_char) |
| 1753 | info->x_char = 0; |
| 1754 | else |
| 1755 | mgslpc_send_xchar(tty, START_CHAR(tty)); |
| 1756 | } |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 1757 | |
Peter Hurley | 9db276f | 2016-01-10 20:36:15 -0800 | [diff] [blame] | 1758 | if (C_CRTSCTS(tty)) { |
Alexey Khoroshilov | 3d55399 | 2013-02-07 01:00:35 +0100 | [diff] [blame] | 1759 | spin_lock_irqsave(&info->lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1760 | info->serial_signals |= SerialSignal_RTS; |
Alexey Khoroshilov | 3d55399 | 2013-02-07 01:00:35 +0100 | [diff] [blame] | 1761 | set_signals(info); |
| 1762 | spin_unlock_irqrestore(&info->lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1763 | } |
| 1764 | } |
| 1765 | |
| 1766 | /* get the current serial statistics |
| 1767 | */ |
| 1768 | static int get_stats(MGSLPC_INFO * info, struct mgsl_icount __user *user_icount) |
| 1769 | { |
| 1770 | int err; |
| 1771 | if (debug_level >= DEBUG_LEVEL_INFO) |
| 1772 | printk("get_params(%s)\n", info->device_name); |
Paul Fulghum | a7482a2 | 2005-09-10 00:26:07 -0700 | [diff] [blame] | 1773 | if (!user_icount) { |
| 1774 | memset(&info->icount, 0, sizeof(info->icount)); |
| 1775 | } else { |
| 1776 | COPY_TO_USER(err, user_icount, &info->icount, sizeof(struct mgsl_icount)); |
| 1777 | if (err) |
| 1778 | return -EFAULT; |
| 1779 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1780 | return 0; |
| 1781 | } |
| 1782 | |
| 1783 | /* get the current serial parameters |
| 1784 | */ |
| 1785 | static int get_params(MGSLPC_INFO * info, MGSL_PARAMS __user *user_params) |
| 1786 | { |
| 1787 | int err; |
| 1788 | if (debug_level >= DEBUG_LEVEL_INFO) |
| 1789 | printk("get_params(%s)\n", info->device_name); |
| 1790 | COPY_TO_USER(err,user_params, &info->params, sizeof(MGSL_PARAMS)); |
| 1791 | if (err) |
| 1792 | return -EFAULT; |
| 1793 | return 0; |
| 1794 | } |
| 1795 | |
| 1796 | /* set the serial parameters |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 1797 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1798 | * Arguments: |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 1799 | * |
Alexey Khoroshilov | 3d55399 | 2013-02-07 01:00:35 +0100 | [diff] [blame] | 1800 | * info pointer to device instance data |
| 1801 | * new_params user buffer containing new serial params |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1802 | * |
| 1803 | * Returns: 0 if success, otherwise error code |
| 1804 | */ |
Alan Cox | eeb4613 | 2009-01-02 13:48:47 +0000 | [diff] [blame] | 1805 | static int set_params(MGSLPC_INFO * info, MGSL_PARAMS __user *new_params, struct tty_struct *tty) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1806 | { |
Alexey Khoroshilov | 3d55399 | 2013-02-07 01:00:35 +0100 | [diff] [blame] | 1807 | unsigned long flags; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1808 | MGSL_PARAMS tmp_params; |
| 1809 | int err; |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 1810 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1811 | if (debug_level >= DEBUG_LEVEL_INFO) |
| 1812 | printk("%s(%d):set_params %s\n", __FILE__,__LINE__, |
Alexey Khoroshilov | 3d55399 | 2013-02-07 01:00:35 +0100 | [diff] [blame] | 1813 | info->device_name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1814 | COPY_FROM_USER(err,&tmp_params, new_params, sizeof(MGSL_PARAMS)); |
| 1815 | if (err) { |
Alexey Khoroshilov | 3d55399 | 2013-02-07 01:00:35 +0100 | [diff] [blame] | 1816 | if (debug_level >= DEBUG_LEVEL_INFO) |
| 1817 | printk("%s(%d):set_params(%s) user buffer copy failed\n", |
| 1818 | __FILE__, __LINE__, info->device_name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1819 | return -EFAULT; |
| 1820 | } |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 1821 | |
Alexey Khoroshilov | 3d55399 | 2013-02-07 01:00:35 +0100 | [diff] [blame] | 1822 | spin_lock_irqsave(&info->lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1823 | memcpy(&info->params,&tmp_params,sizeof(MGSL_PARAMS)); |
Alexey Khoroshilov | 3d55399 | 2013-02-07 01:00:35 +0100 | [diff] [blame] | 1824 | spin_unlock_irqrestore(&info->lock, flags); |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 1825 | |
Alexey Khoroshilov | 3d55399 | 2013-02-07 01:00:35 +0100 | [diff] [blame] | 1826 | mgslpc_change_params(info, tty); |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 1827 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1828 | return 0; |
| 1829 | } |
| 1830 | |
| 1831 | static int get_txidle(MGSLPC_INFO * info, int __user *idle_mode) |
| 1832 | { |
| 1833 | int err; |
| 1834 | if (debug_level >= DEBUG_LEVEL_INFO) |
| 1835 | printk("get_txidle(%s)=%d\n", info->device_name, info->idle_mode); |
| 1836 | COPY_TO_USER(err,idle_mode, &info->idle_mode, sizeof(int)); |
| 1837 | if (err) |
| 1838 | return -EFAULT; |
| 1839 | return 0; |
| 1840 | } |
| 1841 | |
| 1842 | static int set_txidle(MGSLPC_INFO * info, int idle_mode) |
| 1843 | { |
Alexey Khoroshilov | 3d55399 | 2013-02-07 01:00:35 +0100 | [diff] [blame] | 1844 | unsigned long flags; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1845 | if (debug_level >= DEBUG_LEVEL_INFO) |
| 1846 | printk("set_txidle(%s,%d)\n", info->device_name, idle_mode); |
Alexey Khoroshilov | 3d55399 | 2013-02-07 01:00:35 +0100 | [diff] [blame] | 1847 | spin_lock_irqsave(&info->lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1848 | info->idle_mode = idle_mode; |
| 1849 | tx_set_idle(info); |
Alexey Khoroshilov | 3d55399 | 2013-02-07 01:00:35 +0100 | [diff] [blame] | 1850 | spin_unlock_irqrestore(&info->lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1851 | return 0; |
| 1852 | } |
| 1853 | |
| 1854 | static int get_interface(MGSLPC_INFO * info, int __user *if_mode) |
| 1855 | { |
| 1856 | int err; |
| 1857 | if (debug_level >= DEBUG_LEVEL_INFO) |
| 1858 | printk("get_interface(%s)=%d\n", info->device_name, info->if_mode); |
| 1859 | COPY_TO_USER(err,if_mode, &info->if_mode, sizeof(int)); |
| 1860 | if (err) |
| 1861 | return -EFAULT; |
| 1862 | return 0; |
| 1863 | } |
| 1864 | |
| 1865 | static int set_interface(MGSLPC_INFO * info, int if_mode) |
| 1866 | { |
Alexey Khoroshilov | 3d55399 | 2013-02-07 01:00:35 +0100 | [diff] [blame] | 1867 | unsigned long flags; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1868 | unsigned char val; |
| 1869 | if (debug_level >= DEBUG_LEVEL_INFO) |
| 1870 | printk("set_interface(%s,%d)\n", info->device_name, if_mode); |
Alexey Khoroshilov | 3d55399 | 2013-02-07 01:00:35 +0100 | [diff] [blame] | 1871 | spin_lock_irqsave(&info->lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1872 | info->if_mode = if_mode; |
| 1873 | |
| 1874 | val = read_reg(info, PVR) & 0x0f; |
| 1875 | switch (info->if_mode) |
| 1876 | { |
| 1877 | case MGSL_INTERFACE_RS232: val |= PVR_RS232; break; |
| 1878 | case MGSL_INTERFACE_V35: val |= PVR_V35; break; |
| 1879 | case MGSL_INTERFACE_RS422: val |= PVR_RS422; break; |
| 1880 | } |
| 1881 | write_reg(info, PVR, val); |
| 1882 | |
Alexey Khoroshilov | 3d55399 | 2013-02-07 01:00:35 +0100 | [diff] [blame] | 1883 | spin_unlock_irqrestore(&info->lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1884 | return 0; |
| 1885 | } |
| 1886 | |
Alan Cox | eeb4613 | 2009-01-02 13:48:47 +0000 | [diff] [blame] | 1887 | static int set_txenable(MGSLPC_INFO * info, int enable, struct tty_struct *tty) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1888 | { |
Alexey Khoroshilov | 3d55399 | 2013-02-07 01:00:35 +0100 | [diff] [blame] | 1889 | unsigned long flags; |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 1890 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1891 | if (debug_level >= DEBUG_LEVEL_INFO) |
| 1892 | printk("set_txenable(%s,%d)\n", info->device_name, enable); |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 1893 | |
Alexey Khoroshilov | 3d55399 | 2013-02-07 01:00:35 +0100 | [diff] [blame] | 1894 | spin_lock_irqsave(&info->lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1895 | if (enable) { |
| 1896 | if (!info->tx_enabled) |
Alan Cox | eeb4613 | 2009-01-02 13:48:47 +0000 | [diff] [blame] | 1897 | tx_start(info, tty); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1898 | } else { |
| 1899 | if (info->tx_enabled) |
| 1900 | tx_stop(info); |
| 1901 | } |
Alexey Khoroshilov | 3d55399 | 2013-02-07 01:00:35 +0100 | [diff] [blame] | 1902 | spin_unlock_irqrestore(&info->lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1903 | return 0; |
| 1904 | } |
| 1905 | |
| 1906 | static int tx_abort(MGSLPC_INFO * info) |
| 1907 | { |
Alexey Khoroshilov | 3d55399 | 2013-02-07 01:00:35 +0100 | [diff] [blame] | 1908 | unsigned long flags; |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 1909 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1910 | if (debug_level >= DEBUG_LEVEL_INFO) |
| 1911 | printk("tx_abort(%s)\n", info->device_name); |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 1912 | |
Alexey Khoroshilov | 3d55399 | 2013-02-07 01:00:35 +0100 | [diff] [blame] | 1913 | spin_lock_irqsave(&info->lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1914 | if (info->tx_active && info->tx_count && |
| 1915 | info->params.mode == MGSL_MODE_HDLC) { |
| 1916 | /* clear data count so FIFO is not filled on next IRQ. |
| 1917 | * This results in underrun and abort transmission. |
| 1918 | */ |
| 1919 | info->tx_count = info->tx_put = info->tx_get = 0; |
Joe Perches | 0fab6de | 2008-04-28 02:14:02 -0700 | [diff] [blame] | 1920 | info->tx_aborting = true; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1921 | } |
Alexey Khoroshilov | 3d55399 | 2013-02-07 01:00:35 +0100 | [diff] [blame] | 1922 | spin_unlock_irqrestore(&info->lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1923 | return 0; |
| 1924 | } |
| 1925 | |
| 1926 | static int set_rxenable(MGSLPC_INFO * info, int enable) |
| 1927 | { |
Alexey Khoroshilov | 3d55399 | 2013-02-07 01:00:35 +0100 | [diff] [blame] | 1928 | unsigned long flags; |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 1929 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1930 | if (debug_level >= DEBUG_LEVEL_INFO) |
| 1931 | printk("set_rxenable(%s,%d)\n", info->device_name, enable); |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 1932 | |
Alexey Khoroshilov | 3d55399 | 2013-02-07 01:00:35 +0100 | [diff] [blame] | 1933 | spin_lock_irqsave(&info->lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1934 | if (enable) { |
| 1935 | if (!info->rx_enabled) |
| 1936 | rx_start(info); |
| 1937 | } else { |
| 1938 | if (info->rx_enabled) |
| 1939 | rx_stop(info); |
| 1940 | } |
Alexey Khoroshilov | 3d55399 | 2013-02-07 01:00:35 +0100 | [diff] [blame] | 1941 | spin_unlock_irqrestore(&info->lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1942 | return 0; |
| 1943 | } |
| 1944 | |
| 1945 | /* wait for specified event to occur |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 1946 | * |
Alexey Khoroshilov | 3d55399 | 2013-02-07 01:00:35 +0100 | [diff] [blame] | 1947 | * Arguments: info pointer to device instance data |
| 1948 | * mask pointer to bitmask of events to wait for |
| 1949 | * Return Value: 0 if successful and bit mask updated with |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1950 | * of events triggerred, |
Alexey Khoroshilov | 3d55399 | 2013-02-07 01:00:35 +0100 | [diff] [blame] | 1951 | * otherwise error code |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1952 | */ |
| 1953 | static int wait_events(MGSLPC_INFO * info, int __user *mask_ptr) |
| 1954 | { |
Alexey Khoroshilov | 3d55399 | 2013-02-07 01:00:35 +0100 | [diff] [blame] | 1955 | unsigned long flags; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1956 | int s; |
| 1957 | int rc=0; |
| 1958 | struct mgsl_icount cprev, cnow; |
| 1959 | int events; |
| 1960 | int mask; |
| 1961 | struct _input_signal_events oldsigs, newsigs; |
| 1962 | DECLARE_WAITQUEUE(wait, current); |
| 1963 | |
| 1964 | COPY_FROM_USER(rc,&mask, mask_ptr, sizeof(int)); |
| 1965 | if (rc) |
| 1966 | return -EFAULT; |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 1967 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1968 | if (debug_level >= DEBUG_LEVEL_INFO) |
| 1969 | printk("wait_events(%s,%d)\n", info->device_name, mask); |
| 1970 | |
Alexey Khoroshilov | 3d55399 | 2013-02-07 01:00:35 +0100 | [diff] [blame] | 1971 | spin_lock_irqsave(&info->lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1972 | |
| 1973 | /* return immediately if state matches requested events */ |
| 1974 | get_signals(info); |
| 1975 | s = info->serial_signals; |
| 1976 | events = mask & |
| 1977 | ( ((s & SerialSignal_DSR) ? MgslEvent_DsrActive:MgslEvent_DsrInactive) + |
Alexey Khoroshilov | 3d55399 | 2013-02-07 01:00:35 +0100 | [diff] [blame] | 1978 | ((s & SerialSignal_DCD) ? MgslEvent_DcdActive:MgslEvent_DcdInactive) + |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1979 | ((s & SerialSignal_CTS) ? MgslEvent_CtsActive:MgslEvent_CtsInactive) + |
| 1980 | ((s & SerialSignal_RI) ? MgslEvent_RiActive :MgslEvent_RiInactive) ); |
| 1981 | if (events) { |
Alexey Khoroshilov | 3d55399 | 2013-02-07 01:00:35 +0100 | [diff] [blame] | 1982 | spin_unlock_irqrestore(&info->lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1983 | goto exit; |
| 1984 | } |
| 1985 | |
| 1986 | /* save current irq counts */ |
| 1987 | cprev = info->icount; |
| 1988 | oldsigs = info->input_signal_events; |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 1989 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1990 | if ((info->params.mode == MGSL_MODE_HDLC) && |
| 1991 | (mask & MgslEvent_ExitHuntMode)) |
| 1992 | irq_enable(info, CHA, IRQ_EXITHUNT); |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 1993 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1994 | set_current_state(TASK_INTERRUPTIBLE); |
| 1995 | add_wait_queue(&info->event_wait_q, &wait); |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 1996 | |
Alexey Khoroshilov | 3d55399 | 2013-02-07 01:00:35 +0100 | [diff] [blame] | 1997 | spin_unlock_irqrestore(&info->lock, flags); |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 1998 | |
| 1999 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2000 | for(;;) { |
| 2001 | schedule(); |
| 2002 | if (signal_pending(current)) { |
| 2003 | rc = -ERESTARTSYS; |
| 2004 | break; |
| 2005 | } |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 2006 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2007 | /* get current irq counts */ |
Alexey Khoroshilov | 3d55399 | 2013-02-07 01:00:35 +0100 | [diff] [blame] | 2008 | spin_lock_irqsave(&info->lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2009 | cnow = info->icount; |
| 2010 | newsigs = info->input_signal_events; |
| 2011 | set_current_state(TASK_INTERRUPTIBLE); |
Alexey Khoroshilov | 3d55399 | 2013-02-07 01:00:35 +0100 | [diff] [blame] | 2012 | spin_unlock_irqrestore(&info->lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2013 | |
| 2014 | /* if no change, wait aborted for some reason */ |
| 2015 | if (newsigs.dsr_up == oldsigs.dsr_up && |
| 2016 | newsigs.dsr_down == oldsigs.dsr_down && |
| 2017 | newsigs.dcd_up == oldsigs.dcd_up && |
| 2018 | newsigs.dcd_down == oldsigs.dcd_down && |
| 2019 | newsigs.cts_up == oldsigs.cts_up && |
| 2020 | newsigs.cts_down == oldsigs.cts_down && |
| 2021 | newsigs.ri_up == oldsigs.ri_up && |
| 2022 | newsigs.ri_down == oldsigs.ri_down && |
| 2023 | cnow.exithunt == cprev.exithunt && |
| 2024 | cnow.rxidle == cprev.rxidle) { |
| 2025 | rc = -EIO; |
| 2026 | break; |
| 2027 | } |
| 2028 | |
| 2029 | events = mask & |
| 2030 | ( (newsigs.dsr_up != oldsigs.dsr_up ? MgslEvent_DsrActive:0) + |
| 2031 | (newsigs.dsr_down != oldsigs.dsr_down ? MgslEvent_DsrInactive:0) + |
| 2032 | (newsigs.dcd_up != oldsigs.dcd_up ? MgslEvent_DcdActive:0) + |
| 2033 | (newsigs.dcd_down != oldsigs.dcd_down ? MgslEvent_DcdInactive:0) + |
| 2034 | (newsigs.cts_up != oldsigs.cts_up ? MgslEvent_CtsActive:0) + |
| 2035 | (newsigs.cts_down != oldsigs.cts_down ? MgslEvent_CtsInactive:0) + |
| 2036 | (newsigs.ri_up != oldsigs.ri_up ? MgslEvent_RiActive:0) + |
| 2037 | (newsigs.ri_down != oldsigs.ri_down ? MgslEvent_RiInactive:0) + |
| 2038 | (cnow.exithunt != cprev.exithunt ? MgslEvent_ExitHuntMode:0) + |
| 2039 | (cnow.rxidle != cprev.rxidle ? MgslEvent_IdleReceived:0) ); |
| 2040 | if (events) |
| 2041 | break; |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 2042 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2043 | cprev = cnow; |
| 2044 | oldsigs = newsigs; |
| 2045 | } |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 2046 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2047 | remove_wait_queue(&info->event_wait_q, &wait); |
| 2048 | set_current_state(TASK_RUNNING); |
| 2049 | |
| 2050 | if (mask & MgslEvent_ExitHuntMode) { |
Alexey Khoroshilov | 3d55399 | 2013-02-07 01:00:35 +0100 | [diff] [blame] | 2051 | spin_lock_irqsave(&info->lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2052 | if (!waitqueue_active(&info->event_wait_q)) |
| 2053 | irq_disable(info, CHA, IRQ_EXITHUNT); |
Alexey Khoroshilov | 3d55399 | 2013-02-07 01:00:35 +0100 | [diff] [blame] | 2054 | spin_unlock_irqrestore(&info->lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2055 | } |
| 2056 | exit: |
| 2057 | if (rc == 0) |
| 2058 | PUT_USER(rc, events, mask_ptr); |
| 2059 | return rc; |
| 2060 | } |
| 2061 | |
| 2062 | static int modem_input_wait(MGSLPC_INFO *info,int arg) |
| 2063 | { |
Alexey Khoroshilov | 3d55399 | 2013-02-07 01:00:35 +0100 | [diff] [blame] | 2064 | unsigned long flags; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2065 | int rc; |
| 2066 | struct mgsl_icount cprev, cnow; |
| 2067 | DECLARE_WAITQUEUE(wait, current); |
| 2068 | |
| 2069 | /* save current irq counts */ |
Alexey Khoroshilov | 3d55399 | 2013-02-07 01:00:35 +0100 | [diff] [blame] | 2070 | spin_lock_irqsave(&info->lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2071 | cprev = info->icount; |
| 2072 | add_wait_queue(&info->status_event_wait_q, &wait); |
| 2073 | set_current_state(TASK_INTERRUPTIBLE); |
Alexey Khoroshilov | 3d55399 | 2013-02-07 01:00:35 +0100 | [diff] [blame] | 2074 | spin_unlock_irqrestore(&info->lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2075 | |
| 2076 | for(;;) { |
| 2077 | schedule(); |
| 2078 | if (signal_pending(current)) { |
| 2079 | rc = -ERESTARTSYS; |
| 2080 | break; |
| 2081 | } |
| 2082 | |
| 2083 | /* get new irq counts */ |
Alexey Khoroshilov | 3d55399 | 2013-02-07 01:00:35 +0100 | [diff] [blame] | 2084 | spin_lock_irqsave(&info->lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2085 | cnow = info->icount; |
| 2086 | set_current_state(TASK_INTERRUPTIBLE); |
Alexey Khoroshilov | 3d55399 | 2013-02-07 01:00:35 +0100 | [diff] [blame] | 2087 | spin_unlock_irqrestore(&info->lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2088 | |
| 2089 | /* if no change, wait aborted for some reason */ |
| 2090 | if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr && |
| 2091 | cnow.dcd == cprev.dcd && cnow.cts == cprev.cts) { |
| 2092 | rc = -EIO; |
| 2093 | break; |
| 2094 | } |
| 2095 | |
| 2096 | /* check for change in caller specified modem input */ |
| 2097 | if ((arg & TIOCM_RNG && cnow.rng != cprev.rng) || |
| 2098 | (arg & TIOCM_DSR && cnow.dsr != cprev.dsr) || |
| 2099 | (arg & TIOCM_CD && cnow.dcd != cprev.dcd) || |
| 2100 | (arg & TIOCM_CTS && cnow.cts != cprev.cts)) { |
| 2101 | rc = 0; |
| 2102 | break; |
| 2103 | } |
| 2104 | |
| 2105 | cprev = cnow; |
| 2106 | } |
| 2107 | remove_wait_queue(&info->status_event_wait_q, &wait); |
| 2108 | set_current_state(TASK_RUNNING); |
| 2109 | return rc; |
| 2110 | } |
| 2111 | |
| 2112 | /* return the state of the serial control and status signals |
| 2113 | */ |
Alan Cox | 60b33c1 | 2011-02-14 16:26:14 +0000 | [diff] [blame] | 2114 | static int tiocmget(struct tty_struct *tty) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2115 | { |
| 2116 | MGSLPC_INFO *info = (MGSLPC_INFO *)tty->driver_data; |
| 2117 | unsigned int result; |
Alexey Khoroshilov | 3d55399 | 2013-02-07 01:00:35 +0100 | [diff] [blame] | 2118 | unsigned long flags; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2119 | |
Alexey Khoroshilov | 3d55399 | 2013-02-07 01:00:35 +0100 | [diff] [blame] | 2120 | spin_lock_irqsave(&info->lock, flags); |
| 2121 | get_signals(info); |
| 2122 | spin_unlock_irqrestore(&info->lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2123 | |
| 2124 | result = ((info->serial_signals & SerialSignal_RTS) ? TIOCM_RTS:0) + |
| 2125 | ((info->serial_signals & SerialSignal_DTR) ? TIOCM_DTR:0) + |
| 2126 | ((info->serial_signals & SerialSignal_DCD) ? TIOCM_CAR:0) + |
| 2127 | ((info->serial_signals & SerialSignal_RI) ? TIOCM_RNG:0) + |
| 2128 | ((info->serial_signals & SerialSignal_DSR) ? TIOCM_DSR:0) + |
| 2129 | ((info->serial_signals & SerialSignal_CTS) ? TIOCM_CTS:0); |
| 2130 | |
| 2131 | if (debug_level >= DEBUG_LEVEL_INFO) |
| 2132 | printk("%s(%d):%s tiocmget() value=%08X\n", |
Alexey Khoroshilov | 3d55399 | 2013-02-07 01:00:35 +0100 | [diff] [blame] | 2133 | __FILE__, __LINE__, info->device_name, result); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2134 | return result; |
| 2135 | } |
| 2136 | |
| 2137 | /* set modem control signals (DTR/RTS) |
| 2138 | */ |
Alan Cox | 20b9d17 | 2011-02-14 16:26:50 +0000 | [diff] [blame] | 2139 | static int tiocmset(struct tty_struct *tty, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2140 | unsigned int set, unsigned int clear) |
| 2141 | { |
| 2142 | MGSLPC_INFO *info = (MGSLPC_INFO *)tty->driver_data; |
Alexey Khoroshilov | 3d55399 | 2013-02-07 01:00:35 +0100 | [diff] [blame] | 2143 | unsigned long flags; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2144 | |
| 2145 | if (debug_level >= DEBUG_LEVEL_INFO) |
| 2146 | printk("%s(%d):%s tiocmset(%x,%x)\n", |
Alexey Khoroshilov | 3d55399 | 2013-02-07 01:00:35 +0100 | [diff] [blame] | 2147 | __FILE__, __LINE__, info->device_name, set, clear); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2148 | |
| 2149 | if (set & TIOCM_RTS) |
| 2150 | info->serial_signals |= SerialSignal_RTS; |
| 2151 | if (set & TIOCM_DTR) |
| 2152 | info->serial_signals |= SerialSignal_DTR; |
| 2153 | if (clear & TIOCM_RTS) |
| 2154 | info->serial_signals &= ~SerialSignal_RTS; |
| 2155 | if (clear & TIOCM_DTR) |
| 2156 | info->serial_signals &= ~SerialSignal_DTR; |
| 2157 | |
Alexey Khoroshilov | 3d55399 | 2013-02-07 01:00:35 +0100 | [diff] [blame] | 2158 | spin_lock_irqsave(&info->lock, flags); |
| 2159 | set_signals(info); |
| 2160 | spin_unlock_irqrestore(&info->lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2161 | |
| 2162 | return 0; |
| 2163 | } |
| 2164 | |
| 2165 | /* Set or clear transmit break condition |
| 2166 | * |
| 2167 | * Arguments: tty pointer to tty instance data |
| 2168 | * break_state -1=set break condition, 0=clear |
| 2169 | */ |
Alan Cox | 9e98966 | 2008-07-22 11:18:03 +0100 | [diff] [blame] | 2170 | static int mgslpc_break(struct tty_struct *tty, int break_state) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2171 | { |
| 2172 | MGSLPC_INFO * info = (MGSLPC_INFO *)tty->driver_data; |
| 2173 | unsigned long flags; |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 2174 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2175 | if (debug_level >= DEBUG_LEVEL_INFO) |
| 2176 | printk("%s(%d):mgslpc_break(%s,%d)\n", |
Alexey Khoroshilov | 3d55399 | 2013-02-07 01:00:35 +0100 | [diff] [blame] | 2177 | __FILE__, __LINE__, info->device_name, break_state); |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 2178 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2179 | if (mgslpc_paranoia_check(info, tty->name, "mgslpc_break")) |
Alan Cox | 9e98966 | 2008-07-22 11:18:03 +0100 | [diff] [blame] | 2180 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2181 | |
Alexey Khoroshilov | 3d55399 | 2013-02-07 01:00:35 +0100 | [diff] [blame] | 2182 | spin_lock_irqsave(&info->lock, flags); |
| 2183 | if (break_state == -1) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2184 | set_reg_bits(info, CHA+DAFO, BIT6); |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 2185 | else |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2186 | clear_reg_bits(info, CHA+DAFO, BIT6); |
Alexey Khoroshilov | 3d55399 | 2013-02-07 01:00:35 +0100 | [diff] [blame] | 2187 | spin_unlock_irqrestore(&info->lock, flags); |
Alan Cox | 9e98966 | 2008-07-22 11:18:03 +0100 | [diff] [blame] | 2188 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2189 | } |
| 2190 | |
Alan Cox | 0587102 | 2010-09-16 18:21:52 +0100 | [diff] [blame] | 2191 | static int mgslpc_get_icount(struct tty_struct *tty, |
| 2192 | struct serial_icounter_struct *icount) |
| 2193 | { |
| 2194 | MGSLPC_INFO * info = (MGSLPC_INFO *)tty->driver_data; |
| 2195 | struct mgsl_icount cnow; /* kernel counter temps */ |
| 2196 | unsigned long flags; |
| 2197 | |
Alexey Khoroshilov | 3d55399 | 2013-02-07 01:00:35 +0100 | [diff] [blame] | 2198 | spin_lock_irqsave(&info->lock, flags); |
Alan Cox | 0587102 | 2010-09-16 18:21:52 +0100 | [diff] [blame] | 2199 | cnow = info->icount; |
Alexey Khoroshilov | 3d55399 | 2013-02-07 01:00:35 +0100 | [diff] [blame] | 2200 | spin_unlock_irqrestore(&info->lock, flags); |
Alan Cox | 0587102 | 2010-09-16 18:21:52 +0100 | [diff] [blame] | 2201 | |
| 2202 | icount->cts = cnow.cts; |
| 2203 | icount->dsr = cnow.dsr; |
| 2204 | icount->rng = cnow.rng; |
| 2205 | icount->dcd = cnow.dcd; |
| 2206 | icount->rx = cnow.rx; |
| 2207 | icount->tx = cnow.tx; |
| 2208 | icount->frame = cnow.frame; |
| 2209 | icount->overrun = cnow.overrun; |
| 2210 | icount->parity = cnow.parity; |
| 2211 | icount->brk = cnow.brk; |
| 2212 | icount->buf_overrun = cnow.buf_overrun; |
| 2213 | |
| 2214 | return 0; |
| 2215 | } |
| 2216 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2217 | /* Service an IOCTL request |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 2218 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2219 | * Arguments: |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 2220 | * |
Alexey Khoroshilov | 3d55399 | 2013-02-07 01:00:35 +0100 | [diff] [blame] | 2221 | * tty pointer to tty instance data |
| 2222 | * cmd IOCTL command code |
| 2223 | * arg command argument/context |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 2224 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2225 | * Return Value: 0 if success, otherwise error code |
| 2226 | */ |
Axel Lin | 751b384 | 2011-03-01 13:12:47 +0800 | [diff] [blame] | 2227 | static int mgslpc_ioctl(struct tty_struct *tty, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2228 | unsigned int cmd, unsigned long arg) |
| 2229 | { |
| 2230 | MGSLPC_INFO * info = (MGSLPC_INFO *)tty->driver_data; |
Alan Cox | eeb4613 | 2009-01-02 13:48:47 +0000 | [diff] [blame] | 2231 | void __user *argp = (void __user *)arg; |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 2232 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2233 | if (debug_level >= DEBUG_LEVEL_INFO) |
Alexey Khoroshilov | 3d55399 | 2013-02-07 01:00:35 +0100 | [diff] [blame] | 2234 | printk("%s(%d):mgslpc_ioctl %s cmd=%08X\n", __FILE__, __LINE__, |
| 2235 | info->device_name, cmd); |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 2236 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2237 | if (mgslpc_paranoia_check(info, tty->name, "mgslpc_ioctl")) |
| 2238 | return -ENODEV; |
| 2239 | |
| 2240 | if ((cmd != TIOCGSERIAL) && (cmd != TIOCSSERIAL) && |
Alan Cox | 0587102 | 2010-09-16 18:21:52 +0100 | [diff] [blame] | 2241 | (cmd != TIOCMIWAIT)) { |
Peter Hurley | 18900ca | 2016-04-09 17:06:48 -0700 | [diff] [blame] | 2242 | if (tty_io_error(tty)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2243 | return -EIO; |
| 2244 | } |
| 2245 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2246 | switch (cmd) { |
| 2247 | case MGSL_IOCGPARAMS: |
| 2248 | return get_params(info, argp); |
| 2249 | case MGSL_IOCSPARAMS: |
Alan Cox | eeb4613 | 2009-01-02 13:48:47 +0000 | [diff] [blame] | 2250 | return set_params(info, argp, tty); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2251 | case MGSL_IOCGTXIDLE: |
| 2252 | return get_txidle(info, argp); |
| 2253 | case MGSL_IOCSTXIDLE: |
| 2254 | return set_txidle(info, (int)arg); |
| 2255 | case MGSL_IOCGIF: |
| 2256 | return get_interface(info, argp); |
| 2257 | case MGSL_IOCSIF: |
| 2258 | return set_interface(info,(int)arg); |
| 2259 | case MGSL_IOCTXENABLE: |
Alan Cox | eeb4613 | 2009-01-02 13:48:47 +0000 | [diff] [blame] | 2260 | return set_txenable(info,(int)arg, tty); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2261 | case MGSL_IOCRXENABLE: |
| 2262 | return set_rxenable(info,(int)arg); |
| 2263 | case MGSL_IOCTXABORT: |
| 2264 | return tx_abort(info); |
| 2265 | case MGSL_IOCGSTATS: |
| 2266 | return get_stats(info, argp); |
| 2267 | case MGSL_IOCWAITEVENT: |
| 2268 | return wait_events(info, argp); |
| 2269 | case TIOCMIWAIT: |
| 2270 | return modem_input_wait(info,(int)arg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2271 | default: |
| 2272 | return -ENOIOCTLCMD; |
| 2273 | } |
| 2274 | return 0; |
| 2275 | } |
| 2276 | |
| 2277 | /* Set new termios settings |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 2278 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2279 | * Arguments: |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 2280 | * |
Alexey Khoroshilov | 3d55399 | 2013-02-07 01:00:35 +0100 | [diff] [blame] | 2281 | * tty pointer to tty structure |
| 2282 | * termios pointer to buffer to hold returned old termios |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2283 | */ |
Alan Cox | 606d099 | 2006-12-08 02:38:45 -0800 | [diff] [blame] | 2284 | static void mgslpc_set_termios(struct tty_struct *tty, struct ktermios *old_termios) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2285 | { |
| 2286 | MGSLPC_INFO *info = (MGSLPC_INFO *)tty->driver_data; |
| 2287 | unsigned long flags; |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 2288 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2289 | if (debug_level >= DEBUG_LEVEL_INFO) |
Alexey Khoroshilov | 3d55399 | 2013-02-07 01:00:35 +0100 | [diff] [blame] | 2290 | printk("%s(%d):mgslpc_set_termios %s\n", __FILE__, __LINE__, |
| 2291 | tty->driver->name); |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 2292 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2293 | /* just return if nothing has changed */ |
Alan Cox | 373f5ae | 2012-07-19 12:23:28 +0100 | [diff] [blame] | 2294 | if ((tty->termios.c_cflag == old_termios->c_cflag) |
| 2295 | && (RELEVANT_IFLAG(tty->termios.c_iflag) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2296 | == RELEVANT_IFLAG(old_termios->c_iflag))) |
| 2297 | return; |
| 2298 | |
Alan Cox | eeb4613 | 2009-01-02 13:48:47 +0000 | [diff] [blame] | 2299 | mgslpc_change_params(info, tty); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2300 | |
| 2301 | /* Handle transition to B0 status */ |
Peter Hurley | 9db276f | 2016-01-10 20:36:15 -0800 | [diff] [blame] | 2302 | if ((old_termios->c_cflag & CBAUD) && !C_BAUD(tty)) { |
Joe Perches | 9fe8074 | 2013-01-27 18:21:00 -0800 | [diff] [blame] | 2303 | info->serial_signals &= ~(SerialSignal_RTS | SerialSignal_DTR); |
Alexey Khoroshilov | 3d55399 | 2013-02-07 01:00:35 +0100 | [diff] [blame] | 2304 | spin_lock_irqsave(&info->lock, flags); |
| 2305 | set_signals(info); |
| 2306 | spin_unlock_irqrestore(&info->lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2307 | } |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 2308 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2309 | /* Handle transition away from B0 status */ |
Peter Hurley | 9db276f | 2016-01-10 20:36:15 -0800 | [diff] [blame] | 2310 | if (!(old_termios->c_cflag & CBAUD) && C_BAUD(tty)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2311 | info->serial_signals |= SerialSignal_DTR; |
Peter Hurley | 97ef38b | 2016-04-09 17:11:36 -0700 | [diff] [blame] | 2312 | if (!C_CRTSCTS(tty) || !tty_throttled(tty)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2313 | info->serial_signals |= SerialSignal_RTS; |
Alexey Khoroshilov | 3d55399 | 2013-02-07 01:00:35 +0100 | [diff] [blame] | 2314 | spin_lock_irqsave(&info->lock, flags); |
| 2315 | set_signals(info); |
| 2316 | spin_unlock_irqrestore(&info->lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2317 | } |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 2318 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2319 | /* Handle turning off CRTSCTS */ |
Peter Hurley | 9db276f | 2016-01-10 20:36:15 -0800 | [diff] [blame] | 2320 | if (old_termios->c_cflag & CRTSCTS && !C_CRTSCTS(tty)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2321 | tty->hw_stopped = 0; |
| 2322 | tx_release(tty); |
| 2323 | } |
| 2324 | } |
| 2325 | |
| 2326 | static void mgslpc_close(struct tty_struct *tty, struct file * filp) |
| 2327 | { |
| 2328 | MGSLPC_INFO * info = (MGSLPC_INFO *)tty->driver_data; |
Alan Cox | eeb4613 | 2009-01-02 13:48:47 +0000 | [diff] [blame] | 2329 | struct tty_port *port = &info->port; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2330 | |
| 2331 | if (mgslpc_paranoia_check(info, tty->name, "mgslpc_close")) |
| 2332 | return; |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 2333 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2334 | if (debug_level >= DEBUG_LEVEL_INFO) |
| 2335 | printk("%s(%d):mgslpc_close(%s) entry, count=%d\n", |
Alexey Khoroshilov | 3d55399 | 2013-02-07 01:00:35 +0100 | [diff] [blame] | 2336 | __FILE__, __LINE__, info->device_name, port->count); |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 2337 | |
Alan Cox | eeb4613 | 2009-01-02 13:48:47 +0000 | [diff] [blame] | 2338 | if (tty_port_close_start(port, tty, filp) == 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2339 | goto cleanup; |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 2340 | |
Peter Hurley | d41861c | 2016-04-09 17:53:25 -0700 | [diff] [blame] | 2341 | if (tty_port_initialized(port)) |
Alexey Khoroshilov | 3d55399 | 2013-02-07 01:00:35 +0100 | [diff] [blame] | 2342 | mgslpc_wait_until_sent(tty, info->timeout); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2343 | |
Alan Cox | 978e595 | 2008-04-30 00:53:59 -0700 | [diff] [blame] | 2344 | mgslpc_flush_buffer(tty); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2345 | |
Alan Cox | 978e595 | 2008-04-30 00:53:59 -0700 | [diff] [blame] | 2346 | tty_ldisc_flush(tty); |
Alan Cox | eeb4613 | 2009-01-02 13:48:47 +0000 | [diff] [blame] | 2347 | shutdown(info, tty); |
| 2348 | |
| 2349 | tty_port_close_end(port, tty); |
| 2350 | tty_port_tty_set(port, NULL); |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 2351 | cleanup: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2352 | if (debug_level >= DEBUG_LEVEL_INFO) |
Alexey Khoroshilov | 3d55399 | 2013-02-07 01:00:35 +0100 | [diff] [blame] | 2353 | printk("%s(%d):mgslpc_close(%s) exit, count=%d\n", __FILE__, __LINE__, |
Alan Cox | eeb4613 | 2009-01-02 13:48:47 +0000 | [diff] [blame] | 2354 | tty->driver->name, port->count); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2355 | } |
| 2356 | |
| 2357 | /* Wait until the transmitter is empty. |
| 2358 | */ |
| 2359 | static void mgslpc_wait_until_sent(struct tty_struct *tty, int timeout) |
| 2360 | { |
| 2361 | MGSLPC_INFO * info = (MGSLPC_INFO *)tty->driver_data; |
| 2362 | unsigned long orig_jiffies, char_time; |
| 2363 | |
Alexey Khoroshilov | 3d55399 | 2013-02-07 01:00:35 +0100 | [diff] [blame] | 2364 | if (!info) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2365 | return; |
| 2366 | |
| 2367 | if (debug_level >= DEBUG_LEVEL_INFO) |
| 2368 | printk("%s(%d):mgslpc_wait_until_sent(%s) entry\n", |
Alexey Khoroshilov | 3d55399 | 2013-02-07 01:00:35 +0100 | [diff] [blame] | 2369 | __FILE__, __LINE__, info->device_name); |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 2370 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2371 | if (mgslpc_paranoia_check(info, tty->name, "mgslpc_wait_until_sent")) |
| 2372 | return; |
| 2373 | |
Peter Hurley | d41861c | 2016-04-09 17:53:25 -0700 | [diff] [blame] | 2374 | if (!tty_port_initialized(&info->port)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2375 | goto exit; |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 2376 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2377 | orig_jiffies = jiffies; |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 2378 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2379 | /* Set check interval to 1/5 of estimated time to |
| 2380 | * send a character, and make it at least 1. The check |
| 2381 | * interval should also be less than the timeout. |
| 2382 | * Note: use tight timings here to satisfy the NIST-PCTS. |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 2383 | */ |
| 2384 | |
Alexey Khoroshilov | 3d55399 | 2013-02-07 01:00:35 +0100 | [diff] [blame] | 2385 | if (info->params.data_rate) { |
| 2386 | char_time = info->timeout/(32 * 5); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2387 | if (!char_time) |
| 2388 | char_time++; |
| 2389 | } else |
| 2390 | char_time = 1; |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 2391 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2392 | if (timeout) |
| 2393 | char_time = min_t(unsigned long, char_time, timeout); |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 2394 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2395 | if (info->params.mode == MGSL_MODE_HDLC) { |
| 2396 | while (info->tx_active) { |
| 2397 | msleep_interruptible(jiffies_to_msecs(char_time)); |
| 2398 | if (signal_pending(current)) |
| 2399 | break; |
| 2400 | if (timeout && time_after(jiffies, orig_jiffies + timeout)) |
| 2401 | break; |
| 2402 | } |
| 2403 | } else { |
| 2404 | while ((info->tx_count || info->tx_active) && |
| 2405 | info->tx_enabled) { |
| 2406 | msleep_interruptible(jiffies_to_msecs(char_time)); |
| 2407 | if (signal_pending(current)) |
| 2408 | break; |
| 2409 | if (timeout && time_after(jiffies, orig_jiffies + timeout)) |
| 2410 | break; |
| 2411 | } |
| 2412 | } |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 2413 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2414 | exit: |
| 2415 | if (debug_level >= DEBUG_LEVEL_INFO) |
| 2416 | printk("%s(%d):mgslpc_wait_until_sent(%s) exit\n", |
Alexey Khoroshilov | 3d55399 | 2013-02-07 01:00:35 +0100 | [diff] [blame] | 2417 | __FILE__, __LINE__, info->device_name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2418 | } |
| 2419 | |
| 2420 | /* Called by tty_hangup() when a hangup is signaled. |
| 2421 | * This is the same as closing all open files for the port. |
| 2422 | */ |
| 2423 | static void mgslpc_hangup(struct tty_struct *tty) |
| 2424 | { |
| 2425 | MGSLPC_INFO * info = (MGSLPC_INFO *)tty->driver_data; |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 2426 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2427 | if (debug_level >= DEBUG_LEVEL_INFO) |
| 2428 | printk("%s(%d):mgslpc_hangup(%s)\n", |
Alexey Khoroshilov | 3d55399 | 2013-02-07 01:00:35 +0100 | [diff] [blame] | 2429 | __FILE__, __LINE__, info->device_name); |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 2430 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2431 | if (mgslpc_paranoia_check(info, tty->name, "mgslpc_hangup")) |
| 2432 | return; |
| 2433 | |
| 2434 | mgslpc_flush_buffer(tty); |
Alan Cox | eeb4613 | 2009-01-02 13:48:47 +0000 | [diff] [blame] | 2435 | shutdown(info, tty); |
| 2436 | tty_port_hangup(&info->port); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2437 | } |
| 2438 | |
Alan Cox | eeb4613 | 2009-01-02 13:48:47 +0000 | [diff] [blame] | 2439 | static int carrier_raised(struct tty_port *port) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2440 | { |
Alan Cox | eeb4613 | 2009-01-02 13:48:47 +0000 | [diff] [blame] | 2441 | MGSLPC_INFO *info = container_of(port, MGSLPC_INFO, port); |
| 2442 | unsigned long flags; |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 2443 | |
Alexey Khoroshilov | 3d55399 | 2013-02-07 01:00:35 +0100 | [diff] [blame] | 2444 | spin_lock_irqsave(&info->lock, flags); |
| 2445 | get_signals(info); |
| 2446 | spin_unlock_irqrestore(&info->lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2447 | |
Alan Cox | eeb4613 | 2009-01-02 13:48:47 +0000 | [diff] [blame] | 2448 | if (info->serial_signals & SerialSignal_DCD) |
| 2449 | return 1; |
| 2450 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2451 | } |
| 2452 | |
Alan Cox | fcc8ac1 | 2009-06-11 12:24:17 +0100 | [diff] [blame] | 2453 | static void dtr_rts(struct tty_port *port, int onoff) |
Alan Cox | eeb4613 | 2009-01-02 13:48:47 +0000 | [diff] [blame] | 2454 | { |
| 2455 | MGSLPC_INFO *info = container_of(port, MGSLPC_INFO, port); |
| 2456 | unsigned long flags; |
| 2457 | |
Alexey Khoroshilov | 3d55399 | 2013-02-07 01:00:35 +0100 | [diff] [blame] | 2458 | spin_lock_irqsave(&info->lock, flags); |
Alan Cox | fcc8ac1 | 2009-06-11 12:24:17 +0100 | [diff] [blame] | 2459 | if (onoff) |
Joe Perches | 9fe8074 | 2013-01-27 18:21:00 -0800 | [diff] [blame] | 2460 | info->serial_signals |= SerialSignal_RTS | SerialSignal_DTR; |
Alan Cox | fcc8ac1 | 2009-06-11 12:24:17 +0100 | [diff] [blame] | 2461 | else |
Joe Perches | 9fe8074 | 2013-01-27 18:21:00 -0800 | [diff] [blame] | 2462 | info->serial_signals &= ~(SerialSignal_RTS | SerialSignal_DTR); |
Alan Cox | eeb4613 | 2009-01-02 13:48:47 +0000 | [diff] [blame] | 2463 | set_signals(info); |
Alexey Khoroshilov | 3d55399 | 2013-02-07 01:00:35 +0100 | [diff] [blame] | 2464 | spin_unlock_irqrestore(&info->lock, flags); |
Alan Cox | eeb4613 | 2009-01-02 13:48:47 +0000 | [diff] [blame] | 2465 | } |
| 2466 | |
| 2467 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2468 | static int mgslpc_open(struct tty_struct *tty, struct file * filp) |
| 2469 | { |
| 2470 | MGSLPC_INFO *info; |
Alan Cox | eeb4613 | 2009-01-02 13:48:47 +0000 | [diff] [blame] | 2471 | struct tty_port *port; |
Alexey Khoroshilov | 3d55399 | 2013-02-07 01:00:35 +0100 | [diff] [blame] | 2472 | int retval, line; |
| 2473 | unsigned long flags; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2474 | |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 2475 | /* verify range of specified line number */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2476 | line = tty->index; |
Jiri Slaby | 410235f | 2012-03-05 14:52:01 +0100 | [diff] [blame] | 2477 | if (line >= mgslpc_device_count) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2478 | printk("%s(%d):mgslpc_open with invalid line #%d.\n", |
Alexey Khoroshilov | 3d55399 | 2013-02-07 01:00:35 +0100 | [diff] [blame] | 2479 | __FILE__, __LINE__, line); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2480 | return -ENODEV; |
| 2481 | } |
| 2482 | |
| 2483 | /* find the info structure for the specified line */ |
| 2484 | info = mgslpc_device_list; |
| 2485 | while(info && info->line != line) |
| 2486 | info = info->next_device; |
| 2487 | if (mgslpc_paranoia_check(info, tty->name, "mgslpc_open")) |
| 2488 | return -ENODEV; |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 2489 | |
Alan Cox | eeb4613 | 2009-01-02 13:48:47 +0000 | [diff] [blame] | 2490 | port = &info->port; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2491 | tty->driver_data = info; |
Alan Cox | eeb4613 | 2009-01-02 13:48:47 +0000 | [diff] [blame] | 2492 | tty_port_tty_set(port, tty); |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 2493 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2494 | if (debug_level >= DEBUG_LEVEL_INFO) |
| 2495 | printk("%s(%d):mgslpc_open(%s), old ref count = %d\n", |
Alexey Khoroshilov | 3d55399 | 2013-02-07 01:00:35 +0100 | [diff] [blame] | 2496 | __FILE__, __LINE__, tty->driver->name, port->count); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2497 | |
Jiri Slaby | d6c53c0 | 2013-01-03 15:53:05 +0100 | [diff] [blame] | 2498 | port->low_latency = (port->flags & ASYNC_LOW_LATENCY) ? 1 : 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2499 | |
| 2500 | spin_lock_irqsave(&info->netlock, flags); |
| 2501 | if (info->netcount) { |
| 2502 | retval = -EBUSY; |
| 2503 | spin_unlock_irqrestore(&info->netlock, flags); |
| 2504 | goto cleanup; |
| 2505 | } |
Alan Cox | eeb4613 | 2009-01-02 13:48:47 +0000 | [diff] [blame] | 2506 | spin_lock(&port->lock); |
| 2507 | port->count++; |
| 2508 | spin_unlock(&port->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2509 | spin_unlock_irqrestore(&info->netlock, flags); |
| 2510 | |
Alan Cox | eeb4613 | 2009-01-02 13:48:47 +0000 | [diff] [blame] | 2511 | if (port->count == 1) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2512 | /* 1st open on this device, init hardware */ |
Alan Cox | eeb4613 | 2009-01-02 13:48:47 +0000 | [diff] [blame] | 2513 | retval = startup(info, tty); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2514 | if (retval < 0) |
| 2515 | goto cleanup; |
| 2516 | } |
| 2517 | |
Alan Cox | eeb4613 | 2009-01-02 13:48:47 +0000 | [diff] [blame] | 2518 | retval = tty_port_block_til_ready(&info->port, tty, filp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2519 | if (retval) { |
| 2520 | if (debug_level >= DEBUG_LEVEL_INFO) |
| 2521 | printk("%s(%d):block_til_ready(%s) returned %d\n", |
Alexey Khoroshilov | 3d55399 | 2013-02-07 01:00:35 +0100 | [diff] [blame] | 2522 | __FILE__, __LINE__, info->device_name, retval); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2523 | goto cleanup; |
| 2524 | } |
| 2525 | |
| 2526 | if (debug_level >= DEBUG_LEVEL_INFO) |
| 2527 | printk("%s(%d):mgslpc_open(%s) success\n", |
Alexey Khoroshilov | 3d55399 | 2013-02-07 01:00:35 +0100 | [diff] [blame] | 2528 | __FILE__, __LINE__, info->device_name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2529 | retval = 0; |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 2530 | |
| 2531 | cleanup: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2532 | return retval; |
| 2533 | } |
| 2534 | |
| 2535 | /* |
| 2536 | * /proc fs routines.... |
| 2537 | */ |
| 2538 | |
Alexey Dobriyan | 8768714 | 2009-03-31 15:19:17 -0700 | [diff] [blame] | 2539 | static inline void line_info(struct seq_file *m, MGSLPC_INFO *info) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2540 | { |
| 2541 | char stat_buf[30]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2542 | unsigned long flags; |
| 2543 | |
Alexey Dobriyan | 8768714 | 2009-03-31 15:19:17 -0700 | [diff] [blame] | 2544 | seq_printf(m, "%s:io:%04X irq:%d", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2545 | info->device_name, info->io_base, info->irq_level); |
| 2546 | |
| 2547 | /* output current serial signal states */ |
Alexey Khoroshilov | 3d55399 | 2013-02-07 01:00:35 +0100 | [diff] [blame] | 2548 | spin_lock_irqsave(&info->lock, flags); |
| 2549 | get_signals(info); |
| 2550 | spin_unlock_irqrestore(&info->lock, flags); |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 2551 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2552 | stat_buf[0] = 0; |
| 2553 | stat_buf[1] = 0; |
| 2554 | if (info->serial_signals & SerialSignal_RTS) |
| 2555 | strcat(stat_buf, "|RTS"); |
| 2556 | if (info->serial_signals & SerialSignal_CTS) |
| 2557 | strcat(stat_buf, "|CTS"); |
| 2558 | if (info->serial_signals & SerialSignal_DTR) |
| 2559 | strcat(stat_buf, "|DTR"); |
| 2560 | if (info->serial_signals & SerialSignal_DSR) |
| 2561 | strcat(stat_buf, "|DSR"); |
| 2562 | if (info->serial_signals & SerialSignal_DCD) |
| 2563 | strcat(stat_buf, "|CD"); |
| 2564 | if (info->serial_signals & SerialSignal_RI) |
| 2565 | strcat(stat_buf, "|RI"); |
| 2566 | |
| 2567 | if (info->params.mode == MGSL_MODE_HDLC) { |
Alexey Dobriyan | 8768714 | 2009-03-31 15:19:17 -0700 | [diff] [blame] | 2568 | seq_printf(m, " HDLC txok:%d rxok:%d", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2569 | info->icount.txok, info->icount.rxok); |
| 2570 | if (info->icount.txunder) |
Alexey Dobriyan | 8768714 | 2009-03-31 15:19:17 -0700 | [diff] [blame] | 2571 | seq_printf(m, " txunder:%d", info->icount.txunder); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2572 | if (info->icount.txabort) |
Alexey Dobriyan | 8768714 | 2009-03-31 15:19:17 -0700 | [diff] [blame] | 2573 | seq_printf(m, " txabort:%d", info->icount.txabort); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2574 | if (info->icount.rxshort) |
Alexey Dobriyan | 8768714 | 2009-03-31 15:19:17 -0700 | [diff] [blame] | 2575 | seq_printf(m, " rxshort:%d", info->icount.rxshort); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2576 | if (info->icount.rxlong) |
Alexey Dobriyan | 8768714 | 2009-03-31 15:19:17 -0700 | [diff] [blame] | 2577 | seq_printf(m, " rxlong:%d", info->icount.rxlong); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2578 | if (info->icount.rxover) |
Alexey Dobriyan | 8768714 | 2009-03-31 15:19:17 -0700 | [diff] [blame] | 2579 | seq_printf(m, " rxover:%d", info->icount.rxover); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2580 | if (info->icount.rxcrc) |
Alexey Dobriyan | 8768714 | 2009-03-31 15:19:17 -0700 | [diff] [blame] | 2581 | seq_printf(m, " rxcrc:%d", info->icount.rxcrc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2582 | } else { |
Alexey Dobriyan | 8768714 | 2009-03-31 15:19:17 -0700 | [diff] [blame] | 2583 | seq_printf(m, " ASYNC tx:%d rx:%d", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2584 | info->icount.tx, info->icount.rx); |
| 2585 | if (info->icount.frame) |
Alexey Dobriyan | 8768714 | 2009-03-31 15:19:17 -0700 | [diff] [blame] | 2586 | seq_printf(m, " fe:%d", info->icount.frame); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2587 | if (info->icount.parity) |
Alexey Dobriyan | 8768714 | 2009-03-31 15:19:17 -0700 | [diff] [blame] | 2588 | seq_printf(m, " pe:%d", info->icount.parity); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2589 | if (info->icount.brk) |
Alexey Dobriyan | 8768714 | 2009-03-31 15:19:17 -0700 | [diff] [blame] | 2590 | seq_printf(m, " brk:%d", info->icount.brk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2591 | if (info->icount.overrun) |
Alexey Dobriyan | 8768714 | 2009-03-31 15:19:17 -0700 | [diff] [blame] | 2592 | seq_printf(m, " oe:%d", info->icount.overrun); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2593 | } |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 2594 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2595 | /* Append serial signal status to end */ |
Alexey Dobriyan | 8768714 | 2009-03-31 15:19:17 -0700 | [diff] [blame] | 2596 | seq_printf(m, " %s\n", stat_buf+1); |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 2597 | |
Alexey Dobriyan | 8768714 | 2009-03-31 15:19:17 -0700 | [diff] [blame] | 2598 | seq_printf(m, "txactive=%d bh_req=%d bh_run=%d pending_bh=%x\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2599 | info->tx_active,info->bh_requested,info->bh_running, |
| 2600 | info->pending_bh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2601 | } |
| 2602 | |
| 2603 | /* Called to print information about devices |
| 2604 | */ |
Alexey Dobriyan | 8768714 | 2009-03-31 15:19:17 -0700 | [diff] [blame] | 2605 | static int mgslpc_proc_show(struct seq_file *m, void *v) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2606 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2607 | MGSLPC_INFO *info; |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 2608 | |
Alexey Dobriyan | 8768714 | 2009-03-31 15:19:17 -0700 | [diff] [blame] | 2609 | seq_printf(m, "synclink driver:%s\n", driver_version); |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 2610 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2611 | info = mgslpc_device_list; |
Alexey Khoroshilov | 3d55399 | 2013-02-07 01:00:35 +0100 | [diff] [blame] | 2612 | while (info) { |
Alexey Dobriyan | 8768714 | 2009-03-31 15:19:17 -0700 | [diff] [blame] | 2613 | line_info(m, info); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2614 | info = info->next_device; |
| 2615 | } |
Alexey Dobriyan | 8768714 | 2009-03-31 15:19:17 -0700 | [diff] [blame] | 2616 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2617 | } |
| 2618 | |
Alexey Dobriyan | 8768714 | 2009-03-31 15:19:17 -0700 | [diff] [blame] | 2619 | static int mgslpc_proc_open(struct inode *inode, struct file *file) |
| 2620 | { |
| 2621 | return single_open(file, mgslpc_proc_show, NULL); |
| 2622 | } |
| 2623 | |
| 2624 | static const struct file_operations mgslpc_proc_fops = { |
| 2625 | .owner = THIS_MODULE, |
| 2626 | .open = mgslpc_proc_open, |
| 2627 | .read = seq_read, |
| 2628 | .llseek = seq_lseek, |
| 2629 | .release = single_release, |
| 2630 | }; |
| 2631 | |
Peter Hagervall | cdaad34 | 2006-06-23 02:06:04 -0700 | [diff] [blame] | 2632 | static int rx_alloc_buffers(MGSLPC_INFO *info) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2633 | { |
| 2634 | /* each buffer has header and data */ |
| 2635 | info->rx_buf_size = sizeof(RXBUF) + info->max_frame_size; |
| 2636 | |
| 2637 | /* calculate total allocation size for 8 buffers */ |
| 2638 | info->rx_buf_total_size = info->rx_buf_size * 8; |
| 2639 | |
| 2640 | /* limit total allocated memory */ |
| 2641 | if (info->rx_buf_total_size > 0x10000) |
| 2642 | info->rx_buf_total_size = 0x10000; |
| 2643 | |
| 2644 | /* calculate number of buffers */ |
| 2645 | info->rx_buf_count = info->rx_buf_total_size / info->rx_buf_size; |
| 2646 | |
| 2647 | info->rx_buf = kmalloc(info->rx_buf_total_size, GFP_KERNEL); |
| 2648 | if (info->rx_buf == NULL) |
| 2649 | return -ENOMEM; |
| 2650 | |
Paul Fulghum | a6b68a6 | 2012-12-03 11:13:24 -0600 | [diff] [blame] | 2651 | /* unused flag buffer to satisfy receive_buf calling interface */ |
| 2652 | info->flag_buf = kzalloc(info->max_frame_size, GFP_KERNEL); |
| 2653 | if (!info->flag_buf) { |
| 2654 | kfree(info->rx_buf); |
| 2655 | info->rx_buf = NULL; |
| 2656 | return -ENOMEM; |
| 2657 | } |
| 2658 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2659 | rx_reset_buffers(info); |
| 2660 | return 0; |
| 2661 | } |
| 2662 | |
Peter Hagervall | cdaad34 | 2006-06-23 02:06:04 -0700 | [diff] [blame] | 2663 | static void rx_free_buffers(MGSLPC_INFO *info) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2664 | { |
Jesper Juhl | 735d566 | 2005-11-07 01:01:29 -0800 | [diff] [blame] | 2665 | kfree(info->rx_buf); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2666 | info->rx_buf = NULL; |
Paul Fulghum | a6b68a6 | 2012-12-03 11:13:24 -0600 | [diff] [blame] | 2667 | kfree(info->flag_buf); |
| 2668 | info->flag_buf = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2669 | } |
| 2670 | |
Peter Hagervall | cdaad34 | 2006-06-23 02:06:04 -0700 | [diff] [blame] | 2671 | static int claim_resources(MGSLPC_INFO *info) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2672 | { |
Alexey Khoroshilov | 3d55399 | 2013-02-07 01:00:35 +0100 | [diff] [blame] | 2673 | if (rx_alloc_buffers(info) < 0) { |
| 2674 | printk("Can't allocate rx buffer %s\n", info->device_name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2675 | release_resources(info); |
| 2676 | return -ENODEV; |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 2677 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2678 | return 0; |
| 2679 | } |
| 2680 | |
Peter Hagervall | cdaad34 | 2006-06-23 02:06:04 -0700 | [diff] [blame] | 2681 | static void release_resources(MGSLPC_INFO *info) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2682 | { |
| 2683 | if (debug_level >= DEBUG_LEVEL_INFO) |
| 2684 | printk("release_resources(%s)\n", info->device_name); |
| 2685 | rx_free_buffers(info); |
| 2686 | } |
| 2687 | |
| 2688 | /* Add the specified device instance data structure to the |
| 2689 | * global linked list of devices and increment the device count. |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 2690 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2691 | * Arguments: info pointer to device instance data |
| 2692 | */ |
Alexey Khoroshilov | d34138d | 2013-02-07 01:00:34 +0100 | [diff] [blame] | 2693 | static int mgslpc_add_device(MGSLPC_INFO *info) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2694 | { |
Alexey Khoroshilov | d34138d | 2013-02-07 01:00:34 +0100 | [diff] [blame] | 2695 | MGSLPC_INFO *current_dev = NULL; |
| 2696 | struct device *tty_dev; |
| 2697 | int ret; |
| 2698 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2699 | info->next_device = NULL; |
| 2700 | info->line = mgslpc_device_count; |
| 2701 | sprintf(info->device_name,"ttySLP%d",info->line); |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 2702 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2703 | if (info->line < MAX_DEVICE_COUNT) { |
| 2704 | if (maxframe[info->line]) |
| 2705 | info->max_frame_size = maxframe[info->line]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2706 | } |
| 2707 | |
| 2708 | mgslpc_device_count++; |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 2709 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2710 | if (!mgslpc_device_list) |
| 2711 | mgslpc_device_list = info; |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 2712 | else { |
Alexey Khoroshilov | d34138d | 2013-02-07 01:00:34 +0100 | [diff] [blame] | 2713 | current_dev = mgslpc_device_list; |
Alexey Khoroshilov | 3d55399 | 2013-02-07 01:00:35 +0100 | [diff] [blame] | 2714 | while (current_dev->next_device) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2715 | current_dev = current_dev->next_device; |
| 2716 | current_dev->next_device = info; |
| 2717 | } |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 2718 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2719 | if (info->max_frame_size < 4096) |
| 2720 | info->max_frame_size = 4096; |
| 2721 | else if (info->max_frame_size > 65535) |
| 2722 | info->max_frame_size = 65535; |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 2723 | |
Alexey Khoroshilov | 3d55399 | 2013-02-07 01:00:35 +0100 | [diff] [blame] | 2724 | printk("SyncLink PC Card %s:IO=%04X IRQ=%d\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2725 | info->device_name, info->io_base, info->irq_level); |
| 2726 | |
Paul Fulghum | af69c7f | 2006-12-06 20:40:24 -0800 | [diff] [blame] | 2727 | #if SYNCLINK_GENERIC_HDLC |
Alexey Khoroshilov | d34138d | 2013-02-07 01:00:34 +0100 | [diff] [blame] | 2728 | ret = hdlcdev_init(info); |
| 2729 | if (ret != 0) |
| 2730 | goto failed; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2731 | #endif |
Alexey Khoroshilov | d34138d | 2013-02-07 01:00:34 +0100 | [diff] [blame] | 2732 | |
| 2733 | tty_dev = tty_port_register_device(&info->port, serial_driver, info->line, |
Jiri Slaby | a33ba82 | 2012-08-14 10:23:08 +0200 | [diff] [blame] | 2734 | &info->p_dev->dev); |
Alexey Khoroshilov | d34138d | 2013-02-07 01:00:34 +0100 | [diff] [blame] | 2735 | if (IS_ERR(tty_dev)) { |
| 2736 | ret = PTR_ERR(tty_dev); |
| 2737 | #if SYNCLINK_GENERIC_HDLC |
| 2738 | hdlcdev_exit(info); |
| 2739 | #endif |
| 2740 | goto failed; |
| 2741 | } |
| 2742 | |
| 2743 | return 0; |
| 2744 | |
| 2745 | failed: |
| 2746 | if (current_dev) |
| 2747 | current_dev->next_device = NULL; |
| 2748 | else |
| 2749 | mgslpc_device_list = NULL; |
| 2750 | mgslpc_device_count--; |
| 2751 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2752 | } |
| 2753 | |
Peter Hagervall | cdaad34 | 2006-06-23 02:06:04 -0700 | [diff] [blame] | 2754 | static void mgslpc_remove_device(MGSLPC_INFO *remove_info) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2755 | { |
| 2756 | MGSLPC_INFO *info = mgslpc_device_list; |
| 2757 | MGSLPC_INFO *last = NULL; |
| 2758 | |
| 2759 | while(info) { |
| 2760 | if (info == remove_info) { |
| 2761 | if (last) |
| 2762 | last->next_device = info->next_device; |
| 2763 | else |
| 2764 | mgslpc_device_list = info->next_device; |
Jiri Slaby | 16a1065 | 2012-08-07 21:47:53 +0200 | [diff] [blame] | 2765 | tty_unregister_device(serial_driver, info->line); |
Paul Fulghum | af69c7f | 2006-12-06 20:40:24 -0800 | [diff] [blame] | 2766 | #if SYNCLINK_GENERIC_HDLC |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2767 | hdlcdev_exit(info); |
| 2768 | #endif |
| 2769 | release_resources(info); |
Jiri Slaby | 191c5f1 | 2012-11-15 09:49:56 +0100 | [diff] [blame] | 2770 | tty_port_destroy(&info->port); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2771 | kfree(info); |
| 2772 | mgslpc_device_count--; |
| 2773 | return; |
| 2774 | } |
| 2775 | last = info; |
| 2776 | info = info->next_device; |
| 2777 | } |
| 2778 | } |
| 2779 | |
Joe Perches | 25f8f54 | 2011-05-03 19:29:01 -0700 | [diff] [blame] | 2780 | static const struct pcmcia_device_id mgslpc_ids[] = { |
Dominik Brodowski | 4af48c8 | 2005-06-27 16:28:42 -0700 | [diff] [blame] | 2781 | PCMCIA_DEVICE_MANF_CARD(0x02c5, 0x0050), |
| 2782 | PCMCIA_DEVICE_NULL |
| 2783 | }; |
| 2784 | MODULE_DEVICE_TABLE(pcmcia, mgslpc_ids); |
| 2785 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2786 | static struct pcmcia_driver mgslpc_driver = { |
| 2787 | .owner = THIS_MODULE, |
Dominik Brodowski | 2e9b981 | 2010-08-08 11:36:26 +0200 | [diff] [blame] | 2788 | .name = "synclink_cs", |
Dominik Brodowski | 15b99ac | 2006-03-31 17:26:06 +0200 | [diff] [blame] | 2789 | .probe = mgslpc_probe, |
Dominik Brodowski | cc3b486 | 2005-11-14 21:23:14 +0100 | [diff] [blame] | 2790 | .remove = mgslpc_detach, |
Dominik Brodowski | 4af48c8 | 2005-06-27 16:28:42 -0700 | [diff] [blame] | 2791 | .id_table = mgslpc_ids, |
Dominik Brodowski | 98e4c28 | 2005-11-14 21:21:18 +0100 | [diff] [blame] | 2792 | .suspend = mgslpc_suspend, |
| 2793 | .resume = mgslpc_resume, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2794 | }; |
| 2795 | |
Jeff Dike | b68e31d | 2006-10-02 02:17:18 -0700 | [diff] [blame] | 2796 | static const struct tty_operations mgslpc_ops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2797 | .open = mgslpc_open, |
| 2798 | .close = mgslpc_close, |
| 2799 | .write = mgslpc_write, |
| 2800 | .put_char = mgslpc_put_char, |
| 2801 | .flush_chars = mgslpc_flush_chars, |
| 2802 | .write_room = mgslpc_write_room, |
| 2803 | .chars_in_buffer = mgslpc_chars_in_buffer, |
| 2804 | .flush_buffer = mgslpc_flush_buffer, |
| 2805 | .ioctl = mgslpc_ioctl, |
| 2806 | .throttle = mgslpc_throttle, |
| 2807 | .unthrottle = mgslpc_unthrottle, |
| 2808 | .send_xchar = mgslpc_send_xchar, |
| 2809 | .break_ctl = mgslpc_break, |
| 2810 | .wait_until_sent = mgslpc_wait_until_sent, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2811 | .set_termios = mgslpc_set_termios, |
| 2812 | .stop = tx_pause, |
| 2813 | .start = tx_release, |
| 2814 | .hangup = mgslpc_hangup, |
| 2815 | .tiocmget = tiocmget, |
| 2816 | .tiocmset = tiocmset, |
Andres Salomon | dc98d96 | 2010-11-09 14:10:38 -0800 | [diff] [blame] | 2817 | .get_icount = mgslpc_get_icount, |
Alexey Dobriyan | 8768714 | 2009-03-31 15:19:17 -0700 | [diff] [blame] | 2818 | .proc_fops = &mgslpc_proc_fops, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2819 | }; |
| 2820 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2821 | static int __init synclink_cs_init(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2822 | { |
| 2823 | int rc; |
| 2824 | |
Jiri Slaby | cc93441e | 2012-08-07 21:47:54 +0200 | [diff] [blame] | 2825 | if (break_on_load) { |
| 2826 | mgslpc_get_text_ptr(); |
| 2827 | BREAKPOINT(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2828 | } |
| 2829 | |
Jiri Slaby | cc93441e | 2012-08-07 21:47:54 +0200 | [diff] [blame] | 2830 | serial_driver = tty_alloc_driver(MAX_DEVICE_COUNT, |
| 2831 | TTY_DRIVER_REAL_RAW | |
| 2832 | TTY_DRIVER_DYNAMIC_DEV); |
Dan Carpenter | c3a6344 | 2012-08-16 16:16:56 +0300 | [diff] [blame] | 2833 | if (IS_ERR(serial_driver)) { |
| 2834 | rc = PTR_ERR(serial_driver); |
Jiri Slaby | cc93441e | 2012-08-07 21:47:54 +0200 | [diff] [blame] | 2835 | goto err; |
| 2836 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2837 | |
Jiri Slaby | cc93441e | 2012-08-07 21:47:54 +0200 | [diff] [blame] | 2838 | /* Initialize the tty_driver structure */ |
| 2839 | serial_driver->driver_name = "synclink_cs"; |
| 2840 | serial_driver->name = "ttySLP"; |
| 2841 | serial_driver->major = ttymajor; |
| 2842 | serial_driver->minor_start = 64; |
| 2843 | serial_driver->type = TTY_DRIVER_TYPE_SERIAL; |
| 2844 | serial_driver->subtype = SERIAL_TYPE_NORMAL; |
| 2845 | serial_driver->init_termios = tty_std_termios; |
| 2846 | serial_driver->init_termios.c_cflag = |
| 2847 | B9600 | CS8 | CREAD | HUPCL | CLOCAL; |
| 2848 | tty_set_operations(serial_driver, &mgslpc_ops); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2849 | |
Jiri Slaby | cc93441e | 2012-08-07 21:47:54 +0200 | [diff] [blame] | 2850 | rc = tty_register_driver(serial_driver); |
| 2851 | if (rc < 0) { |
| 2852 | printk(KERN_ERR "%s(%d):Couldn't register serial driver\n", |
| 2853 | __FILE__, __LINE__); |
| 2854 | goto err_put_tty; |
| 2855 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2856 | |
Jiri Slaby | 16a1065 | 2012-08-07 21:47:53 +0200 | [diff] [blame] | 2857 | rc = pcmcia_register_driver(&mgslpc_driver); |
| 2858 | if (rc < 0) |
| 2859 | goto err_unreg_tty; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2860 | |
Jiri Slaby | cc93441e | 2012-08-07 21:47:54 +0200 | [diff] [blame] | 2861 | printk(KERN_INFO "%s %s, tty major#%d\n", driver_name, driver_version, |
| 2862 | serial_driver->major); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2863 | |
Jiri Slaby | 737586f | 2012-08-07 21:47:52 +0200 | [diff] [blame] | 2864 | return 0; |
Jiri Slaby | 16a1065 | 2012-08-07 21:47:53 +0200 | [diff] [blame] | 2865 | err_unreg_tty: |
| 2866 | tty_unregister_driver(serial_driver); |
Jiri Slaby | 737586f | 2012-08-07 21:47:52 +0200 | [diff] [blame] | 2867 | err_put_tty: |
| 2868 | put_tty_driver(serial_driver); |
Jiri Slaby | 16a1065 | 2012-08-07 21:47:53 +0200 | [diff] [blame] | 2869 | err: |
Jiri Slaby | 737586f | 2012-08-07 21:47:52 +0200 | [diff] [blame] | 2870 | return rc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2871 | } |
| 2872 | |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 2873 | static void __exit synclink_cs_exit(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2874 | { |
Jiri Slaby | 16a1065 | 2012-08-07 21:47:53 +0200 | [diff] [blame] | 2875 | pcmcia_unregister_driver(&mgslpc_driver); |
Jiri Slaby | 737586f | 2012-08-07 21:47:52 +0200 | [diff] [blame] | 2876 | tty_unregister_driver(serial_driver); |
| 2877 | put_tty_driver(serial_driver); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2878 | } |
| 2879 | |
| 2880 | module_init(synclink_cs_init); |
| 2881 | module_exit(synclink_cs_exit); |
| 2882 | |
| 2883 | static void mgslpc_set_rate(MGSLPC_INFO *info, unsigned char channel, unsigned int rate) |
| 2884 | { |
| 2885 | unsigned int M, N; |
| 2886 | unsigned char val; |
| 2887 | |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 2888 | /* note:standard BRG mode is broken in V3.2 chip |
| 2889 | * so enhanced mode is always used |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2890 | */ |
| 2891 | |
| 2892 | if (rate) { |
| 2893 | N = 3686400 / rate; |
| 2894 | if (!N) |
| 2895 | N = 1; |
| 2896 | N >>= 1; |
| 2897 | for (M = 1; N > 64 && M < 16; M++) |
| 2898 | N >>= 1; |
| 2899 | N--; |
| 2900 | |
| 2901 | /* BGR[5..0] = N |
| 2902 | * BGR[9..6] = M |
| 2903 | * BGR[7..0] contained in BGR register |
| 2904 | * BGR[9..8] contained in CCR2[7..6] |
| 2905 | * divisor = (N+1)*2^M |
| 2906 | * |
| 2907 | * Note: M *must* not be zero (causes asymetric duty cycle) |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 2908 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2909 | write_reg(info, (unsigned char) (channel + BGR), |
| 2910 | (unsigned char) ((M << 6) + N)); |
| 2911 | val = read_reg(info, (unsigned char) (channel + CCR2)) & 0x3f; |
| 2912 | val |= ((M << 4) & 0xc0); |
| 2913 | write_reg(info, (unsigned char) (channel + CCR2), val); |
| 2914 | } |
| 2915 | } |
| 2916 | |
| 2917 | /* Enabled the AUX clock output at the specified frequency. |
| 2918 | */ |
| 2919 | static void enable_auxclk(MGSLPC_INFO *info) |
| 2920 | { |
| 2921 | unsigned char val; |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 2922 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2923 | /* MODE |
| 2924 | * |
| 2925 | * 07..06 MDS[1..0] 10 = transparent HDLC mode |
| 2926 | * 05 ADM Address Mode, 0 = no addr recognition |
| 2927 | * 04 TMD Timer Mode, 0 = external |
| 2928 | * 03 RAC Receiver Active, 0 = inactive |
| 2929 | * 02 RTS 0=RTS active during xmit, 1=RTS always active |
| 2930 | * 01 TRS Timer Resolution, 1=512 |
| 2931 | * 00 TLP Test Loop, 0 = no loop |
| 2932 | * |
| 2933 | * 1000 0010 |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 2934 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2935 | val = 0x82; |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 2936 | |
| 2937 | /* channel B RTS is used to enable AUXCLK driver on SP505 */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2938 | if (info->params.mode == MGSL_MODE_HDLC && info->params.clock_speed) |
| 2939 | val |= BIT2; |
| 2940 | write_reg(info, CHB + MODE, val); |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 2941 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2942 | /* CCR0 |
| 2943 | * |
| 2944 | * 07 PU Power Up, 1=active, 0=power down |
| 2945 | * 06 MCE Master Clock Enable, 1=enabled |
| 2946 | * 05 Reserved, 0 |
| 2947 | * 04..02 SC[2..0] Encoding |
| 2948 | * 01..00 SM[1..0] Serial Mode, 00=HDLC |
| 2949 | * |
| 2950 | * 11000000 |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 2951 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2952 | write_reg(info, CHB + CCR0, 0xc0); |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 2953 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2954 | /* CCR1 |
| 2955 | * |
| 2956 | * 07 SFLG Shared Flag, 0 = disable shared flags |
| 2957 | * 06 GALP Go Active On Loop, 0 = not used |
| 2958 | * 05 GLP Go On Loop, 0 = not used |
| 2959 | * 04 ODS Output Driver Select, 1=TxD is push-pull output |
| 2960 | * 03 ITF Interframe Time Fill, 0=mark, 1=flag |
| 2961 | * 02..00 CM[2..0] Clock Mode |
| 2962 | * |
| 2963 | * 0001 0111 |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 2964 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2965 | write_reg(info, CHB + CCR1, 0x17); |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 2966 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2967 | /* CCR2 (Channel B) |
| 2968 | * |
| 2969 | * 07..06 BGR[9..8] Baud rate bits 9..8 |
| 2970 | * 05 BDF Baud rate divisor factor, 0=1, 1=BGR value |
| 2971 | * 04 SSEL Clock source select, 1=submode b |
| 2972 | * 03 TOE 0=TxCLK is input, 1=TxCLK is output |
| 2973 | * 02 RWX Read/Write Exchange 0=disabled |
| 2974 | * 01 C32, CRC select, 0=CRC-16, 1=CRC-32 |
| 2975 | * 00 DIV, data inversion 0=disabled, 1=enabled |
| 2976 | * |
| 2977 | * 0011 1000 |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 2978 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2979 | if (info->params.mode == MGSL_MODE_HDLC && info->params.clock_speed) |
| 2980 | write_reg(info, CHB + CCR2, 0x38); |
| 2981 | else |
| 2982 | write_reg(info, CHB + CCR2, 0x30); |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 2983 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2984 | /* CCR4 |
| 2985 | * |
| 2986 | * 07 MCK4 Master Clock Divide by 4, 1=enabled |
| 2987 | * 06 EBRG Enhanced Baud Rate Generator Mode, 1=enabled |
| 2988 | * 05 TST1 Test Pin, 0=normal operation |
| 2989 | * 04 ICD Ivert Carrier Detect, 1=enabled (active low) |
| 2990 | * 03..02 Reserved, must be 0 |
| 2991 | * 01..00 RFT[1..0] RxFIFO Threshold 00=32 bytes |
| 2992 | * |
| 2993 | * 0101 0000 |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 2994 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2995 | write_reg(info, CHB + CCR4, 0x50); |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 2996 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2997 | /* if auxclk not enabled, set internal BRG so |
| 2998 | * CTS transitions can be detected (requires TxC) |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 2999 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3000 | if (info->params.mode == MGSL_MODE_HDLC && info->params.clock_speed) |
| 3001 | mgslpc_set_rate(info, CHB, info->params.clock_speed); |
| 3002 | else |
| 3003 | mgslpc_set_rate(info, CHB, 921600); |
| 3004 | } |
| 3005 | |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 3006 | static void loopback_enable(MGSLPC_INFO *info) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3007 | { |
| 3008 | unsigned char val; |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 3009 | |
| 3010 | /* CCR1:02..00 CM[2..0] Clock Mode = 111 (clock mode 7) */ |
Alexandru Juncu | ecda040 | 2013-07-19 11:24:03 +0300 | [diff] [blame] | 3011 | val = read_reg(info, CHA + CCR1) | (BIT2 | BIT1 | BIT0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3012 | write_reg(info, CHA + CCR1, val); |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 3013 | |
| 3014 | /* CCR2:04 SSEL Clock source select, 1=submode b */ |
Alexandru Juncu | ecda040 | 2013-07-19 11:24:03 +0300 | [diff] [blame] | 3015 | val = read_reg(info, CHA + CCR2) | (BIT4 | BIT5); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3016 | write_reg(info, CHA + CCR2, val); |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 3017 | |
| 3018 | /* set LinkSpeed if available, otherwise default to 2Mbps */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3019 | if (info->params.clock_speed) |
| 3020 | mgslpc_set_rate(info, CHA, info->params.clock_speed); |
| 3021 | else |
| 3022 | mgslpc_set_rate(info, CHA, 1843200); |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 3023 | |
| 3024 | /* MODE:00 TLP Test Loop, 1=loopback enabled */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3025 | val = read_reg(info, CHA + MODE) | BIT0; |
| 3026 | write_reg(info, CHA + MODE, val); |
| 3027 | } |
| 3028 | |
Peter Hagervall | cdaad34 | 2006-06-23 02:06:04 -0700 | [diff] [blame] | 3029 | static void hdlc_mode(MGSLPC_INFO *info) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3030 | { |
| 3031 | unsigned char val; |
| 3032 | unsigned char clkmode, clksubmode; |
| 3033 | |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 3034 | /* disable all interrupts */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3035 | irq_disable(info, CHA, 0xffff); |
| 3036 | irq_disable(info, CHB, 0xffff); |
| 3037 | port_irq_disable(info, 0xff); |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 3038 | |
| 3039 | /* assume clock mode 0a, rcv=RxC xmt=TxC */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3040 | clkmode = clksubmode = 0; |
| 3041 | if (info->params.flags & HDLC_FLAG_RXC_DPLL |
| 3042 | && info->params.flags & HDLC_FLAG_TXC_DPLL) { |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 3043 | /* clock mode 7a, rcv = DPLL, xmt = DPLL */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3044 | clkmode = 7; |
| 3045 | } else if (info->params.flags & HDLC_FLAG_RXC_BRG |
| 3046 | && info->params.flags & HDLC_FLAG_TXC_BRG) { |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 3047 | /* clock mode 7b, rcv = BRG, xmt = BRG */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3048 | clkmode = 7; |
| 3049 | clksubmode = 1; |
| 3050 | } else if (info->params.flags & HDLC_FLAG_RXC_DPLL) { |
| 3051 | if (info->params.flags & HDLC_FLAG_TXC_BRG) { |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 3052 | /* clock mode 6b, rcv = DPLL, xmt = BRG/16 */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3053 | clkmode = 6; |
| 3054 | clksubmode = 1; |
| 3055 | } else { |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 3056 | /* clock mode 6a, rcv = DPLL, xmt = TxC */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3057 | clkmode = 6; |
| 3058 | } |
| 3059 | } else if (info->params.flags & HDLC_FLAG_TXC_BRG) { |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 3060 | /* clock mode 0b, rcv = RxC, xmt = BRG */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3061 | clksubmode = 1; |
| 3062 | } |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 3063 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3064 | /* MODE |
| 3065 | * |
| 3066 | * 07..06 MDS[1..0] 10 = transparent HDLC mode |
| 3067 | * 05 ADM Address Mode, 0 = no addr recognition |
| 3068 | * 04 TMD Timer Mode, 0 = external |
| 3069 | * 03 RAC Receiver Active, 0 = inactive |
| 3070 | * 02 RTS 0=RTS active during xmit, 1=RTS always active |
| 3071 | * 01 TRS Timer Resolution, 1=512 |
| 3072 | * 00 TLP Test Loop, 0 = no loop |
| 3073 | * |
| 3074 | * 1000 0010 |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 3075 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3076 | val = 0x82; |
| 3077 | if (info->params.loopback) |
| 3078 | val |= BIT0; |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 3079 | |
| 3080 | /* preserve RTS state */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3081 | if (info->serial_signals & SerialSignal_RTS) |
| 3082 | val |= BIT2; |
| 3083 | write_reg(info, CHA + MODE, val); |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 3084 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3085 | /* CCR0 |
| 3086 | * |
| 3087 | * 07 PU Power Up, 1=active, 0=power down |
| 3088 | * 06 MCE Master Clock Enable, 1=enabled |
| 3089 | * 05 Reserved, 0 |
| 3090 | * 04..02 SC[2..0] Encoding |
| 3091 | * 01..00 SM[1..0] Serial Mode, 00=HDLC |
| 3092 | * |
| 3093 | * 11000000 |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 3094 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3095 | val = 0xc0; |
| 3096 | switch (info->params.encoding) |
| 3097 | { |
| 3098 | case HDLC_ENCODING_NRZI: |
| 3099 | val |= BIT3; |
| 3100 | break; |
| 3101 | case HDLC_ENCODING_BIPHASE_SPACE: |
| 3102 | val |= BIT4; |
| 3103 | break; // FM0 |
| 3104 | case HDLC_ENCODING_BIPHASE_MARK: |
Alexandru Juncu | ecda040 | 2013-07-19 11:24:03 +0300 | [diff] [blame] | 3105 | val |= BIT4 | BIT2; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3106 | break; // FM1 |
| 3107 | case HDLC_ENCODING_BIPHASE_LEVEL: |
Alexandru Juncu | ecda040 | 2013-07-19 11:24:03 +0300 | [diff] [blame] | 3108 | val |= BIT4 | BIT3; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3109 | break; // Manchester |
| 3110 | } |
| 3111 | write_reg(info, CHA + CCR0, val); |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 3112 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3113 | /* CCR1 |
| 3114 | * |
| 3115 | * 07 SFLG Shared Flag, 0 = disable shared flags |
| 3116 | * 06 GALP Go Active On Loop, 0 = not used |
| 3117 | * 05 GLP Go On Loop, 0 = not used |
| 3118 | * 04 ODS Output Driver Select, 1=TxD is push-pull output |
| 3119 | * 03 ITF Interframe Time Fill, 0=mark, 1=flag |
| 3120 | * 02..00 CM[2..0] Clock Mode |
| 3121 | * |
| 3122 | * 0001 0000 |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 3123 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3124 | val = 0x10 + clkmode; |
| 3125 | write_reg(info, CHA + CCR1, val); |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 3126 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3127 | /* CCR2 |
| 3128 | * |
| 3129 | * 07..06 BGR[9..8] Baud rate bits 9..8 |
| 3130 | * 05 BDF Baud rate divisor factor, 0=1, 1=BGR value |
| 3131 | * 04 SSEL Clock source select, 1=submode b |
| 3132 | * 03 TOE 0=TxCLK is input, 0=TxCLK is input |
| 3133 | * 02 RWX Read/Write Exchange 0=disabled |
| 3134 | * 01 C32, CRC select, 0=CRC-16, 1=CRC-32 |
| 3135 | * 00 DIV, data inversion 0=disabled, 1=enabled |
| 3136 | * |
| 3137 | * 0000 0000 |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 3138 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3139 | val = 0x00; |
| 3140 | if (clkmode == 2 || clkmode == 3 || clkmode == 6 |
| 3141 | || clkmode == 7 || (clkmode == 0 && clksubmode == 1)) |
| 3142 | val |= BIT5; |
| 3143 | if (clksubmode) |
| 3144 | val |= BIT4; |
| 3145 | if (info->params.crc_type == HDLC_CRC_32_CCITT) |
| 3146 | val |= BIT1; |
| 3147 | if (info->params.encoding == HDLC_ENCODING_NRZB) |
| 3148 | val |= BIT0; |
| 3149 | write_reg(info, CHA + CCR2, val); |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 3150 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3151 | /* CCR3 |
| 3152 | * |
| 3153 | * 07..06 PRE[1..0] Preamble count 00=1, 01=2, 10=4, 11=8 |
| 3154 | * 05 EPT Enable preamble transmission, 1=enabled |
| 3155 | * 04 RADD Receive address pushed to FIFO, 0=disabled |
| 3156 | * 03 CRL CRC Reset Level, 0=FFFF |
| 3157 | * 02 RCRC Rx CRC 0=On 1=Off |
| 3158 | * 01 TCRC Tx CRC 0=On 1=Off |
| 3159 | * 00 PSD DPLL Phase Shift Disable |
| 3160 | * |
| 3161 | * 0000 0000 |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 3162 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3163 | val = 0x00; |
| 3164 | if (info->params.crc_type == HDLC_CRC_NONE) |
Alexandru Juncu | ecda040 | 2013-07-19 11:24:03 +0300 | [diff] [blame] | 3165 | val |= BIT2 | BIT1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3166 | if (info->params.preamble != HDLC_PREAMBLE_PATTERN_NONE) |
| 3167 | val |= BIT5; |
| 3168 | switch (info->params.preamble_length) |
| 3169 | { |
| 3170 | case HDLC_PREAMBLE_LENGTH_16BITS: |
| 3171 | val |= BIT6; |
| 3172 | break; |
| 3173 | case HDLC_PREAMBLE_LENGTH_32BITS: |
| 3174 | val |= BIT6; |
| 3175 | break; |
| 3176 | case HDLC_PREAMBLE_LENGTH_64BITS: |
Alexandru Juncu | ecda040 | 2013-07-19 11:24:03 +0300 | [diff] [blame] | 3177 | val |= BIT7 | BIT6; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3178 | break; |
| 3179 | } |
| 3180 | write_reg(info, CHA + CCR3, val); |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 3181 | |
| 3182 | /* PRE - Preamble pattern */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3183 | val = 0; |
| 3184 | switch (info->params.preamble) |
| 3185 | { |
| 3186 | case HDLC_PREAMBLE_PATTERN_FLAGS: val = 0x7e; break; |
| 3187 | case HDLC_PREAMBLE_PATTERN_10: val = 0xaa; break; |
| 3188 | case HDLC_PREAMBLE_PATTERN_01: val = 0x55; break; |
| 3189 | case HDLC_PREAMBLE_PATTERN_ONES: val = 0xff; break; |
| 3190 | } |
| 3191 | write_reg(info, CHA + PRE, val); |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 3192 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3193 | /* CCR4 |
| 3194 | * |
| 3195 | * 07 MCK4 Master Clock Divide by 4, 1=enabled |
| 3196 | * 06 EBRG Enhanced Baud Rate Generator Mode, 1=enabled |
| 3197 | * 05 TST1 Test Pin, 0=normal operation |
| 3198 | * 04 ICD Ivert Carrier Detect, 1=enabled (active low) |
| 3199 | * 03..02 Reserved, must be 0 |
| 3200 | * 01..00 RFT[1..0] RxFIFO Threshold 00=32 bytes |
| 3201 | * |
| 3202 | * 0101 0000 |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 3203 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3204 | val = 0x50; |
| 3205 | write_reg(info, CHA + CCR4, val); |
| 3206 | if (info->params.flags & HDLC_FLAG_RXC_DPLL) |
| 3207 | mgslpc_set_rate(info, CHA, info->params.clock_speed * 16); |
| 3208 | else |
| 3209 | mgslpc_set_rate(info, CHA, info->params.clock_speed); |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 3210 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3211 | /* RLCR Receive length check register |
| 3212 | * |
| 3213 | * 7 1=enable receive length check |
| 3214 | * 6..0 Max frame length = (RL + 1) * 32 |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 3215 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3216 | write_reg(info, CHA + RLCR, 0); |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 3217 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3218 | /* XBCH Transmit Byte Count High |
| 3219 | * |
| 3220 | * 07 DMA mode, 0 = interrupt driven |
| 3221 | * 06 NRM, 0=ABM (ignored) |
| 3222 | * 05 CAS Carrier Auto Start |
| 3223 | * 04 XC Transmit Continuously (ignored) |
| 3224 | * 03..00 XBC[10..8] Transmit byte count bits 10..8 |
| 3225 | * |
| 3226 | * 0000 0000 |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 3227 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3228 | val = 0x00; |
| 3229 | if (info->params.flags & HDLC_FLAG_AUTO_DCD) |
| 3230 | val |= BIT5; |
| 3231 | write_reg(info, CHA + XBCH, val); |
| 3232 | enable_auxclk(info); |
| 3233 | if (info->params.loopback || info->testing_irq) |
| 3234 | loopback_enable(info); |
| 3235 | if (info->params.flags & HDLC_FLAG_AUTO_CTS) |
| 3236 | { |
| 3237 | irq_enable(info, CHB, IRQ_CTS); |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 3238 | /* PVR[3] 1=AUTO CTS active */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3239 | set_reg_bits(info, CHA + PVR, BIT3); |
| 3240 | } else |
| 3241 | clear_reg_bits(info, CHA + PVR, BIT3); |
| 3242 | |
| 3243 | irq_enable(info, CHA, |
Alexandru Juncu | ecda040 | 2013-07-19 11:24:03 +0300 | [diff] [blame] | 3244 | IRQ_RXEOM | IRQ_RXFIFO | IRQ_ALLSENT | |
| 3245 | IRQ_UNDERRUN | IRQ_TXFIFO); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3246 | issue_command(info, CHA, CMD_TXRESET + CMD_RXRESET); |
| 3247 | wait_command_complete(info, CHA); |
| 3248 | read_reg16(info, CHA + ISR); /* clear pending IRQs */ |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 3249 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3250 | /* Master clock mode enabled above to allow reset commands |
| 3251 | * to complete even if no data clocks are present. |
| 3252 | * |
| 3253 | * Disable master clock mode for normal communications because |
| 3254 | * V3.2 of the ESCC2 has a bug that prevents the transmit all sent |
| 3255 | * IRQ when in master clock mode. |
| 3256 | * |
| 3257 | * Leave master clock mode enabled for IRQ test because the |
| 3258 | * timer IRQ used by the test can only happen in master clock mode. |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 3259 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3260 | if (!info->testing_irq) |
| 3261 | clear_reg_bits(info, CHA + CCR0, BIT6); |
| 3262 | |
| 3263 | tx_set_idle(info); |
| 3264 | |
| 3265 | tx_stop(info); |
| 3266 | rx_stop(info); |
| 3267 | } |
| 3268 | |
Peter Hagervall | cdaad34 | 2006-06-23 02:06:04 -0700 | [diff] [blame] | 3269 | static void rx_stop(MGSLPC_INFO *info) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3270 | { |
| 3271 | if (debug_level >= DEBUG_LEVEL_ISR) |
| 3272 | printk("%s(%d):rx_stop(%s)\n", |
Alexey Khoroshilov | 3d55399 | 2013-02-07 01:00:35 +0100 | [diff] [blame] | 3273 | __FILE__, __LINE__, info->device_name); |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 3274 | |
| 3275 | /* MODE:03 RAC Receiver Active, 0=inactive */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3276 | clear_reg_bits(info, CHA + MODE, BIT3); |
| 3277 | |
Joe Perches | 0fab6de | 2008-04-28 02:14:02 -0700 | [diff] [blame] | 3278 | info->rx_enabled = false; |
| 3279 | info->rx_overflow = false; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3280 | } |
| 3281 | |
Peter Hagervall | cdaad34 | 2006-06-23 02:06:04 -0700 | [diff] [blame] | 3282 | static void rx_start(MGSLPC_INFO *info) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3283 | { |
| 3284 | if (debug_level >= DEBUG_LEVEL_ISR) |
| 3285 | printk("%s(%d):rx_start(%s)\n", |
Alexey Khoroshilov | 3d55399 | 2013-02-07 01:00:35 +0100 | [diff] [blame] | 3286 | __FILE__, __LINE__, info->device_name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3287 | |
| 3288 | rx_reset_buffers(info); |
Joe Perches | 0fab6de | 2008-04-28 02:14:02 -0700 | [diff] [blame] | 3289 | info->rx_enabled = false; |
| 3290 | info->rx_overflow = false; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3291 | |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 3292 | /* MODE:03 RAC Receiver Active, 1=active */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3293 | set_reg_bits(info, CHA + MODE, BIT3); |
| 3294 | |
Joe Perches | 0fab6de | 2008-04-28 02:14:02 -0700 | [diff] [blame] | 3295 | info->rx_enabled = true; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3296 | } |
| 3297 | |
Alan Cox | eeb4613 | 2009-01-02 13:48:47 +0000 | [diff] [blame] | 3298 | static void tx_start(MGSLPC_INFO *info, struct tty_struct *tty) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3299 | { |
| 3300 | if (debug_level >= DEBUG_LEVEL_ISR) |
| 3301 | printk("%s(%d):tx_start(%s)\n", |
Alexey Khoroshilov | 3d55399 | 2013-02-07 01:00:35 +0100 | [diff] [blame] | 3302 | __FILE__, __LINE__, info->device_name); |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 3303 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3304 | if (info->tx_count) { |
| 3305 | /* If auto RTS enabled and RTS is inactive, then assert */ |
| 3306 | /* RTS and set a flag indicating that the driver should */ |
| 3307 | /* negate RTS when the transmission completes. */ |
Joe Perches | 0fab6de | 2008-04-28 02:14:02 -0700 | [diff] [blame] | 3308 | info->drop_rts_on_tx_done = false; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3309 | |
| 3310 | if (info->params.flags & HDLC_FLAG_AUTO_RTS) { |
| 3311 | get_signals(info); |
| 3312 | if (!(info->serial_signals & SerialSignal_RTS)) { |
| 3313 | info->serial_signals |= SerialSignal_RTS; |
| 3314 | set_signals(info); |
Joe Perches | 0fab6de | 2008-04-28 02:14:02 -0700 | [diff] [blame] | 3315 | info->drop_rts_on_tx_done = true; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3316 | } |
| 3317 | } |
| 3318 | |
| 3319 | if (info->params.mode == MGSL_MODE_ASYNC) { |
| 3320 | if (!info->tx_active) { |
Joe Perches | 0fab6de | 2008-04-28 02:14:02 -0700 | [diff] [blame] | 3321 | info->tx_active = true; |
Alan Cox | eeb4613 | 2009-01-02 13:48:47 +0000 | [diff] [blame] | 3322 | tx_ready(info, tty); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3323 | } |
| 3324 | } else { |
Joe Perches | 0fab6de | 2008-04-28 02:14:02 -0700 | [diff] [blame] | 3325 | info->tx_active = true; |
Alan Cox | eeb4613 | 2009-01-02 13:48:47 +0000 | [diff] [blame] | 3326 | tx_ready(info, tty); |
Jiri Slaby | 40565f1 | 2007-02-12 00:52:31 -0800 | [diff] [blame] | 3327 | mod_timer(&info->tx_timer, jiffies + |
| 3328 | msecs_to_jiffies(5000)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3329 | } |
| 3330 | } |
| 3331 | |
| 3332 | if (!info->tx_enabled) |
Joe Perches | 0fab6de | 2008-04-28 02:14:02 -0700 | [diff] [blame] | 3333 | info->tx_enabled = true; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3334 | } |
| 3335 | |
Peter Hagervall | cdaad34 | 2006-06-23 02:06:04 -0700 | [diff] [blame] | 3336 | static void tx_stop(MGSLPC_INFO *info) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3337 | { |
| 3338 | if (debug_level >= DEBUG_LEVEL_ISR) |
| 3339 | printk("%s(%d):tx_stop(%s)\n", |
Alexey Khoroshilov | 3d55399 | 2013-02-07 01:00:35 +0100 | [diff] [blame] | 3340 | __FILE__, __LINE__, info->device_name); |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 3341 | |
| 3342 | del_timer(&info->tx_timer); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3343 | |
Joe Perches | 0fab6de | 2008-04-28 02:14:02 -0700 | [diff] [blame] | 3344 | info->tx_enabled = false; |
| 3345 | info->tx_active = false; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3346 | } |
| 3347 | |
| 3348 | /* Reset the adapter to a known state and prepare it for further use. |
| 3349 | */ |
Peter Hagervall | cdaad34 | 2006-06-23 02:06:04 -0700 | [diff] [blame] | 3350 | static void reset_device(MGSLPC_INFO *info) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3351 | { |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 3352 | /* power up both channels (set BIT7) */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3353 | write_reg(info, CHA + CCR0, 0x80); |
| 3354 | write_reg(info, CHB + CCR0, 0x80); |
| 3355 | write_reg(info, CHA + MODE, 0); |
| 3356 | write_reg(info, CHB + MODE, 0); |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 3357 | |
| 3358 | /* disable all interrupts */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3359 | irq_disable(info, CHA, 0xffff); |
| 3360 | irq_disable(info, CHB, 0xffff); |
| 3361 | port_irq_disable(info, 0xff); |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 3362 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3363 | /* PCR Port Configuration Register |
| 3364 | * |
| 3365 | * 07..04 DEC[3..0] Serial I/F select outputs |
| 3366 | * 03 output, 1=AUTO CTS control enabled |
| 3367 | * 02 RI Ring Indicator input 0=active |
| 3368 | * 01 DSR input 0=active |
| 3369 | * 00 DTR output 0=active |
| 3370 | * |
| 3371 | * 0000 0110 |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 3372 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3373 | write_reg(info, PCR, 0x06); |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 3374 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3375 | /* PVR Port Value Register |
| 3376 | * |
| 3377 | * 07..04 DEC[3..0] Serial I/F select (0000=disabled) |
| 3378 | * 03 AUTO CTS output 1=enabled |
| 3379 | * 02 RI Ring Indicator input |
| 3380 | * 01 DSR input |
| 3381 | * 00 DTR output (1=inactive) |
| 3382 | * |
| 3383 | * 0000 0001 |
| 3384 | */ |
| 3385 | // write_reg(info, PVR, PVR_DTR); |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 3386 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3387 | /* IPC Interrupt Port Configuration |
| 3388 | * |
| 3389 | * 07 VIS 1=Masked interrupts visible |
| 3390 | * 06..05 Reserved, 0 |
| 3391 | * 04..03 SLA Slave address, 00 ignored |
| 3392 | * 02 CASM Cascading Mode, 1=daisy chain |
| 3393 | * 01..00 IC[1..0] Interrupt Config, 01=push-pull output, active low |
| 3394 | * |
| 3395 | * 0000 0101 |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 3396 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3397 | write_reg(info, IPC, 0x05); |
| 3398 | } |
| 3399 | |
Peter Hagervall | cdaad34 | 2006-06-23 02:06:04 -0700 | [diff] [blame] | 3400 | static void async_mode(MGSLPC_INFO *info) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3401 | { |
| 3402 | unsigned char val; |
| 3403 | |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 3404 | /* disable all interrupts */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3405 | irq_disable(info, CHA, 0xffff); |
| 3406 | irq_disable(info, CHB, 0xffff); |
| 3407 | port_irq_disable(info, 0xff); |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 3408 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3409 | /* MODE |
| 3410 | * |
| 3411 | * 07 Reserved, 0 |
| 3412 | * 06 FRTS RTS State, 0=active |
| 3413 | * 05 FCTS Flow Control on CTS |
| 3414 | * 04 FLON Flow Control Enable |
| 3415 | * 03 RAC Receiver Active, 0 = inactive |
| 3416 | * 02 RTS 0=Auto RTS, 1=manual RTS |
| 3417 | * 01 TRS Timer Resolution, 1=512 |
| 3418 | * 00 TLP Test Loop, 0 = no loop |
| 3419 | * |
| 3420 | * 0000 0110 |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 3421 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3422 | val = 0x06; |
| 3423 | if (info->params.loopback) |
| 3424 | val |= BIT0; |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 3425 | |
| 3426 | /* preserve RTS state */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3427 | if (!(info->serial_signals & SerialSignal_RTS)) |
| 3428 | val |= BIT6; |
| 3429 | write_reg(info, CHA + MODE, val); |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 3430 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3431 | /* CCR0 |
| 3432 | * |
| 3433 | * 07 PU Power Up, 1=active, 0=power down |
| 3434 | * 06 MCE Master Clock Enable, 1=enabled |
| 3435 | * 05 Reserved, 0 |
| 3436 | * 04..02 SC[2..0] Encoding, 000=NRZ |
| 3437 | * 01..00 SM[1..0] Serial Mode, 11=Async |
| 3438 | * |
| 3439 | * 1000 0011 |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 3440 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3441 | write_reg(info, CHA + CCR0, 0x83); |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 3442 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3443 | /* CCR1 |
| 3444 | * |
| 3445 | * 07..05 Reserved, 0 |
| 3446 | * 04 ODS Output Driver Select, 1=TxD is push-pull output |
| 3447 | * 03 BCR Bit Clock Rate, 1=16x |
| 3448 | * 02..00 CM[2..0] Clock Mode, 111=BRG |
| 3449 | * |
| 3450 | * 0001 1111 |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 3451 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3452 | write_reg(info, CHA + CCR1, 0x1f); |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 3453 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3454 | /* CCR2 (channel A) |
| 3455 | * |
| 3456 | * 07..06 BGR[9..8] Baud rate bits 9..8 |
| 3457 | * 05 BDF Baud rate divisor factor, 0=1, 1=BGR value |
| 3458 | * 04 SSEL Clock source select, 1=submode b |
| 3459 | * 03 TOE 0=TxCLK is input, 0=TxCLK is input |
| 3460 | * 02 RWX Read/Write Exchange 0=disabled |
| 3461 | * 01 Reserved, 0 |
| 3462 | * 00 DIV, data inversion 0=disabled, 1=enabled |
| 3463 | * |
| 3464 | * 0001 0000 |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 3465 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3466 | write_reg(info, CHA + CCR2, 0x10); |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 3467 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3468 | /* CCR3 |
| 3469 | * |
| 3470 | * 07..01 Reserved, 0 |
| 3471 | * 00 PSD DPLL Phase Shift Disable |
| 3472 | * |
| 3473 | * 0000 0000 |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 3474 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3475 | write_reg(info, CHA + CCR3, 0); |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 3476 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3477 | /* CCR4 |
| 3478 | * |
| 3479 | * 07 MCK4 Master Clock Divide by 4, 1=enabled |
| 3480 | * 06 EBRG Enhanced Baud Rate Generator Mode, 1=enabled |
| 3481 | * 05 TST1 Test Pin, 0=normal operation |
| 3482 | * 04 ICD Ivert Carrier Detect, 1=enabled (active low) |
| 3483 | * 03..00 Reserved, must be 0 |
| 3484 | * |
| 3485 | * 0101 0000 |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 3486 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3487 | write_reg(info, CHA + CCR4, 0x50); |
| 3488 | mgslpc_set_rate(info, CHA, info->params.data_rate * 16); |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 3489 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3490 | /* DAFO Data Format |
| 3491 | * |
| 3492 | * 07 Reserved, 0 |
| 3493 | * 06 XBRK transmit break, 0=normal operation |
| 3494 | * 05 Stop bits (0=1, 1=2) |
| 3495 | * 04..03 PAR[1..0] Parity (01=odd, 10=even) |
| 3496 | * 02 PAREN Parity Enable |
| 3497 | * 01..00 CHL[1..0] Character Length (00=8, 01=7) |
| 3498 | * |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 3499 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3500 | val = 0x00; |
| 3501 | if (info->params.data_bits != 8) |
| 3502 | val |= BIT0; /* 7 bits */ |
| 3503 | if (info->params.stop_bits != 1) |
| 3504 | val |= BIT5; |
| 3505 | if (info->params.parity != ASYNC_PARITY_NONE) |
| 3506 | { |
| 3507 | val |= BIT2; /* Parity enable */ |
| 3508 | if (info->params.parity == ASYNC_PARITY_ODD) |
| 3509 | val |= BIT3; |
| 3510 | else |
| 3511 | val |= BIT4; |
| 3512 | } |
| 3513 | write_reg(info, CHA + DAFO, val); |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 3514 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3515 | /* RFC Rx FIFO Control |
| 3516 | * |
| 3517 | * 07 Reserved, 0 |
| 3518 | * 06 DPS, 1=parity bit not stored in data byte |
| 3519 | * 05 DXS, 0=all data stored in FIFO (including XON/XOFF) |
| 3520 | * 04 RFDF Rx FIFO Data Format, 1=status byte stored in FIFO |
| 3521 | * 03..02 RFTH[1..0], rx threshold, 11=16 status + 16 data byte |
| 3522 | * 01 Reserved, 0 |
| 3523 | * 00 TCDE Terminate Char Detect Enable, 0=disabled |
| 3524 | * |
| 3525 | * 0101 1100 |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 3526 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3527 | write_reg(info, CHA + RFC, 0x5c); |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 3528 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3529 | /* RLCR Receive length check register |
| 3530 | * |
| 3531 | * Max frame length = (RL + 1) * 32 |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 3532 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3533 | write_reg(info, CHA + RLCR, 0); |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 3534 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3535 | /* XBCH Transmit Byte Count High |
| 3536 | * |
| 3537 | * 07 DMA mode, 0 = interrupt driven |
| 3538 | * 06 NRM, 0=ABM (ignored) |
| 3539 | * 05 CAS Carrier Auto Start |
| 3540 | * 04 XC Transmit Continuously (ignored) |
| 3541 | * 03..00 XBC[10..8] Transmit byte count bits 10..8 |
| 3542 | * |
| 3543 | * 0000 0000 |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 3544 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3545 | val = 0x00; |
| 3546 | if (info->params.flags & HDLC_FLAG_AUTO_DCD) |
| 3547 | val |= BIT5; |
| 3548 | write_reg(info, CHA + XBCH, val); |
| 3549 | if (info->params.flags & HDLC_FLAG_AUTO_CTS) |
| 3550 | irq_enable(info, CHA, IRQ_CTS); |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 3551 | |
| 3552 | /* MODE:03 RAC Receiver Active, 1=active */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3553 | set_reg_bits(info, CHA + MODE, BIT3); |
| 3554 | enable_auxclk(info); |
| 3555 | if (info->params.flags & HDLC_FLAG_AUTO_CTS) { |
| 3556 | irq_enable(info, CHB, IRQ_CTS); |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 3557 | /* PVR[3] 1=AUTO CTS active */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3558 | set_reg_bits(info, CHA + PVR, BIT3); |
| 3559 | } else |
| 3560 | clear_reg_bits(info, CHA + PVR, BIT3); |
| 3561 | irq_enable(info, CHA, |
Alexandru Juncu | ecda040 | 2013-07-19 11:24:03 +0300 | [diff] [blame] | 3562 | IRQ_RXEOM | IRQ_RXFIFO | IRQ_BREAK_ON | IRQ_RXTIME | |
| 3563 | IRQ_ALLSENT | IRQ_TXFIFO); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3564 | issue_command(info, CHA, CMD_TXRESET + CMD_RXRESET); |
| 3565 | wait_command_complete(info, CHA); |
| 3566 | read_reg16(info, CHA + ISR); /* clear pending IRQs */ |
| 3567 | } |
| 3568 | |
| 3569 | /* Set the HDLC idle mode for the transmitter. |
| 3570 | */ |
Peter Hagervall | cdaad34 | 2006-06-23 02:06:04 -0700 | [diff] [blame] | 3571 | static void tx_set_idle(MGSLPC_INFO *info) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3572 | { |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 3573 | /* Note: ESCC2 only supports flags and one idle modes */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3574 | if (info->idle_mode == HDLC_TXIDLE_FLAGS) |
| 3575 | set_reg_bits(info, CHA + CCR1, BIT3); |
| 3576 | else |
| 3577 | clear_reg_bits(info, CHA + CCR1, BIT3); |
| 3578 | } |
| 3579 | |
| 3580 | /* get state of the V24 status (input) signals. |
| 3581 | */ |
Peter Hagervall | cdaad34 | 2006-06-23 02:06:04 -0700 | [diff] [blame] | 3582 | static void get_signals(MGSLPC_INFO *info) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3583 | { |
| 3584 | unsigned char status = 0; |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 3585 | |
Joe Perches | 9fe8074 | 2013-01-27 18:21:00 -0800 | [diff] [blame] | 3586 | /* preserve RTS and DTR */ |
| 3587 | info->serial_signals &= SerialSignal_RTS | SerialSignal_DTR; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3588 | |
| 3589 | if (read_reg(info, CHB + VSTR) & BIT7) |
| 3590 | info->serial_signals |= SerialSignal_DCD; |
| 3591 | if (read_reg(info, CHB + STAR) & BIT1) |
| 3592 | info->serial_signals |= SerialSignal_CTS; |
| 3593 | |
| 3594 | status = read_reg(info, CHA + PVR); |
| 3595 | if (!(status & PVR_RI)) |
| 3596 | info->serial_signals |= SerialSignal_RI; |
| 3597 | if (!(status & PVR_DSR)) |
| 3598 | info->serial_signals |= SerialSignal_DSR; |
| 3599 | } |
| 3600 | |
Joe Perches | 9fe8074 | 2013-01-27 18:21:00 -0800 | [diff] [blame] | 3601 | /* Set the state of RTS and DTR based on contents of |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3602 | * serial_signals member of device extension. |
| 3603 | */ |
Peter Hagervall | cdaad34 | 2006-06-23 02:06:04 -0700 | [diff] [blame] | 3604 | static void set_signals(MGSLPC_INFO *info) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3605 | { |
| 3606 | unsigned char val; |
| 3607 | |
| 3608 | val = read_reg(info, CHA + MODE); |
| 3609 | if (info->params.mode == MGSL_MODE_ASYNC) { |
| 3610 | if (info->serial_signals & SerialSignal_RTS) |
| 3611 | val &= ~BIT6; |
| 3612 | else |
| 3613 | val |= BIT6; |
| 3614 | } else { |
| 3615 | if (info->serial_signals & SerialSignal_RTS) |
| 3616 | val |= BIT2; |
| 3617 | else |
| 3618 | val &= ~BIT2; |
| 3619 | } |
| 3620 | write_reg(info, CHA + MODE, val); |
| 3621 | |
| 3622 | if (info->serial_signals & SerialSignal_DTR) |
| 3623 | clear_reg_bits(info, CHA + PVR, PVR_DTR); |
| 3624 | else |
| 3625 | set_reg_bits(info, CHA + PVR, PVR_DTR); |
| 3626 | } |
| 3627 | |
Peter Hagervall | cdaad34 | 2006-06-23 02:06:04 -0700 | [diff] [blame] | 3628 | static void rx_reset_buffers(MGSLPC_INFO *info) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3629 | { |
| 3630 | RXBUF *buf; |
| 3631 | int i; |
| 3632 | |
| 3633 | info->rx_put = 0; |
| 3634 | info->rx_get = 0; |
| 3635 | info->rx_frame_count = 0; |
| 3636 | for (i=0 ; i < info->rx_buf_count ; i++) { |
| 3637 | buf = (RXBUF*)(info->rx_buf + (i * info->rx_buf_size)); |
| 3638 | buf->status = buf->count = 0; |
| 3639 | } |
| 3640 | } |
| 3641 | |
| 3642 | /* Attempt to return a received HDLC frame |
| 3643 | * Only frames received without errors are returned. |
| 3644 | * |
Joe Perches | 0fab6de | 2008-04-28 02:14:02 -0700 | [diff] [blame] | 3645 | * Returns true if frame returned, otherwise false |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3646 | */ |
Alan Cox | eeb4613 | 2009-01-02 13:48:47 +0000 | [diff] [blame] | 3647 | static bool rx_get_frame(MGSLPC_INFO *info, struct tty_struct *tty) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3648 | { |
| 3649 | unsigned short status; |
| 3650 | RXBUF *buf; |
| 3651 | unsigned int framesize = 0; |
| 3652 | unsigned long flags; |
Joe Perches | 0fab6de | 2008-04-28 02:14:02 -0700 | [diff] [blame] | 3653 | bool return_frame = false; |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 3654 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3655 | if (info->rx_frame_count == 0) |
Joe Perches | 0fab6de | 2008-04-28 02:14:02 -0700 | [diff] [blame] | 3656 | return false; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3657 | |
| 3658 | buf = (RXBUF*)(info->rx_buf + (info->rx_get * info->rx_buf_size)); |
| 3659 | |
| 3660 | status = buf->status; |
| 3661 | |
| 3662 | /* 07 VFR 1=valid frame |
| 3663 | * 06 RDO 1=data overrun |
| 3664 | * 05 CRC 1=OK, 0=error |
| 3665 | * 04 RAB 1=frame aborted |
| 3666 | */ |
| 3667 | if ((status & 0xf0) != 0xA0) { |
| 3668 | if (!(status & BIT7) || (status & BIT4)) |
| 3669 | info->icount.rxabort++; |
| 3670 | else if (status & BIT6) |
| 3671 | info->icount.rxover++; |
| 3672 | else if (!(status & BIT5)) { |
| 3673 | info->icount.rxcrc++; |
| 3674 | if (info->params.crc_type & HDLC_CRC_RETURN_EX) |
Joe Perches | 0fab6de | 2008-04-28 02:14:02 -0700 | [diff] [blame] | 3675 | return_frame = true; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3676 | } |
| 3677 | framesize = 0; |
Paul Fulghum | af69c7f | 2006-12-06 20:40:24 -0800 | [diff] [blame] | 3678 | #if SYNCLINK_GENERIC_HDLC |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3679 | { |
Krzysztof Halasa | 198191c | 2008-06-30 23:26:53 +0200 | [diff] [blame] | 3680 | info->netdev->stats.rx_errors++; |
| 3681 | info->netdev->stats.rx_frame_errors++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3682 | } |
| 3683 | #endif |
| 3684 | } else |
Joe Perches | 0fab6de | 2008-04-28 02:14:02 -0700 | [diff] [blame] | 3685 | return_frame = true; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3686 | |
| 3687 | if (return_frame) |
| 3688 | framesize = buf->count; |
| 3689 | |
| 3690 | if (debug_level >= DEBUG_LEVEL_BH) |
| 3691 | printk("%s(%d):rx_get_frame(%s) status=%04X size=%d\n", |
Alexey Khoroshilov | 3d55399 | 2013-02-07 01:00:35 +0100 | [diff] [blame] | 3692 | __FILE__, __LINE__, info->device_name, status, framesize); |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 3693 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3694 | if (debug_level >= DEBUG_LEVEL_DATA) |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 3695 | trace_block(info, buf->data, framesize, 0); |
| 3696 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3697 | if (framesize) { |
| 3698 | if ((info->params.crc_type & HDLC_CRC_RETURN_EX && |
| 3699 | framesize+1 > info->max_frame_size) || |
| 3700 | framesize > info->max_frame_size) |
| 3701 | info->icount.rxlong++; |
| 3702 | else { |
| 3703 | if (status & BIT5) |
| 3704 | info->icount.rxok++; |
| 3705 | |
| 3706 | if (info->params.crc_type & HDLC_CRC_RETURN_EX) { |
| 3707 | *(buf->data + framesize) = status & BIT5 ? RX_OK:RX_CRC_ERROR; |
| 3708 | ++framesize; |
| 3709 | } |
| 3710 | |
Paul Fulghum | af69c7f | 2006-12-06 20:40:24 -0800 | [diff] [blame] | 3711 | #if SYNCLINK_GENERIC_HDLC |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3712 | if (info->netcount) |
| 3713 | hdlcdev_rx(info, buf->data, framesize); |
| 3714 | else |
| 3715 | #endif |
| 3716 | ldisc_receive_buf(tty, buf->data, info->flag_buf, framesize); |
| 3717 | } |
| 3718 | } |
| 3719 | |
Alexey Khoroshilov | 3d55399 | 2013-02-07 01:00:35 +0100 | [diff] [blame] | 3720 | spin_lock_irqsave(&info->lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3721 | buf->status = buf->count = 0; |
| 3722 | info->rx_frame_count--; |
| 3723 | info->rx_get++; |
| 3724 | if (info->rx_get >= info->rx_buf_count) |
| 3725 | info->rx_get = 0; |
Alexey Khoroshilov | 3d55399 | 2013-02-07 01:00:35 +0100 | [diff] [blame] | 3726 | spin_unlock_irqrestore(&info->lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3727 | |
Joe Perches | 0fab6de | 2008-04-28 02:14:02 -0700 | [diff] [blame] | 3728 | return true; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3729 | } |
| 3730 | |
Joe Perches | 0fab6de | 2008-04-28 02:14:02 -0700 | [diff] [blame] | 3731 | static bool register_test(MGSLPC_INFO *info) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3732 | { |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 3733 | static unsigned char patterns[] = |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3734 | { 0x00, 0xff, 0xaa, 0x55, 0x69, 0x96, 0x0f }; |
Tobias Klauser | fe97107 | 2006-01-09 20:54:02 -0800 | [diff] [blame] | 3735 | static unsigned int count = ARRAY_SIZE(patterns); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3736 | unsigned int i; |
Joe Perches | 0fab6de | 2008-04-28 02:14:02 -0700 | [diff] [blame] | 3737 | bool rc = true; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3738 | unsigned long flags; |
| 3739 | |
Alexey Khoroshilov | 3d55399 | 2013-02-07 01:00:35 +0100 | [diff] [blame] | 3740 | spin_lock_irqsave(&info->lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3741 | reset_device(info); |
| 3742 | |
| 3743 | for (i = 0; i < count; i++) { |
| 3744 | write_reg(info, XAD1, patterns[i]); |
| 3745 | write_reg(info, XAD2, patterns[(i + 1) % count]); |
Tobias Klauser | fe97107 | 2006-01-09 20:54:02 -0800 | [diff] [blame] | 3746 | if ((read_reg(info, XAD1) != patterns[i]) || |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3747 | (read_reg(info, XAD2) != patterns[(i + 1) % count])) { |
Joe Perches | 0fab6de | 2008-04-28 02:14:02 -0700 | [diff] [blame] | 3748 | rc = false; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3749 | break; |
| 3750 | } |
| 3751 | } |
| 3752 | |
Alexey Khoroshilov | 3d55399 | 2013-02-07 01:00:35 +0100 | [diff] [blame] | 3753 | spin_unlock_irqrestore(&info->lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3754 | return rc; |
| 3755 | } |
| 3756 | |
Joe Perches | 0fab6de | 2008-04-28 02:14:02 -0700 | [diff] [blame] | 3757 | static bool irq_test(MGSLPC_INFO *info) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3758 | { |
| 3759 | unsigned long end_time; |
| 3760 | unsigned long flags; |
| 3761 | |
Alexey Khoroshilov | 3d55399 | 2013-02-07 01:00:35 +0100 | [diff] [blame] | 3762 | spin_lock_irqsave(&info->lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3763 | reset_device(info); |
| 3764 | |
Joe Perches | 0fab6de | 2008-04-28 02:14:02 -0700 | [diff] [blame] | 3765 | info->testing_irq = true; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3766 | hdlc_mode(info); |
| 3767 | |
Joe Perches | 0fab6de | 2008-04-28 02:14:02 -0700 | [diff] [blame] | 3768 | info->irq_occurred = false; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3769 | |
| 3770 | /* init hdlc mode */ |
| 3771 | |
| 3772 | irq_enable(info, CHA, IRQ_TIMER); |
| 3773 | write_reg(info, CHA + TIMR, 0); /* 512 cycles */ |
| 3774 | issue_command(info, CHA, CMD_START_TIMER); |
| 3775 | |
Alexey Khoroshilov | 3d55399 | 2013-02-07 01:00:35 +0100 | [diff] [blame] | 3776 | spin_unlock_irqrestore(&info->lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3777 | |
| 3778 | end_time=100; |
| 3779 | while(end_time-- && !info->irq_occurred) { |
| 3780 | msleep_interruptible(10); |
| 3781 | } |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 3782 | |
Joe Perches | 0fab6de | 2008-04-28 02:14:02 -0700 | [diff] [blame] | 3783 | info->testing_irq = false; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3784 | |
Alexey Khoroshilov | 3d55399 | 2013-02-07 01:00:35 +0100 | [diff] [blame] | 3785 | spin_lock_irqsave(&info->lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3786 | reset_device(info); |
Alexey Khoroshilov | 3d55399 | 2013-02-07 01:00:35 +0100 | [diff] [blame] | 3787 | spin_unlock_irqrestore(&info->lock, flags); |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 3788 | |
Joe Perches | 0fab6de | 2008-04-28 02:14:02 -0700 | [diff] [blame] | 3789 | return info->irq_occurred; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3790 | } |
| 3791 | |
Peter Hagervall | cdaad34 | 2006-06-23 02:06:04 -0700 | [diff] [blame] | 3792 | static int adapter_test(MGSLPC_INFO *info) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3793 | { |
| 3794 | if (!register_test(info)) { |
| 3795 | info->init_error = DiagStatus_AddressFailure; |
Alexey Khoroshilov | 3d55399 | 2013-02-07 01:00:35 +0100 | [diff] [blame] | 3796 | printk("%s(%d):Register test failure for device %s Addr=%04X\n", |
| 3797 | __FILE__, __LINE__, info->device_name, (unsigned short)(info->io_base)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3798 | return -ENODEV; |
| 3799 | } |
| 3800 | |
| 3801 | if (!irq_test(info)) { |
| 3802 | info->init_error = DiagStatus_IrqFailure; |
Alexey Khoroshilov | 3d55399 | 2013-02-07 01:00:35 +0100 | [diff] [blame] | 3803 | printk("%s(%d):Interrupt test failure for device %s IRQ=%d\n", |
| 3804 | __FILE__, __LINE__, info->device_name, (unsigned short)(info->irq_level)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3805 | return -ENODEV; |
| 3806 | } |
| 3807 | |
| 3808 | if (debug_level >= DEBUG_LEVEL_INFO) |
| 3809 | printk("%s(%d):device %s passed diagnostics\n", |
Alexey Khoroshilov | 3d55399 | 2013-02-07 01:00:35 +0100 | [diff] [blame] | 3810 | __FILE__, __LINE__, info->device_name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3811 | return 0; |
| 3812 | } |
| 3813 | |
Peter Hagervall | cdaad34 | 2006-06-23 02:06:04 -0700 | [diff] [blame] | 3814 | static void trace_block(MGSLPC_INFO *info,const char* data, int count, int xmit) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3815 | { |
| 3816 | int i; |
| 3817 | int linecount; |
| 3818 | if (xmit) |
Alexey Khoroshilov | 3d55399 | 2013-02-07 01:00:35 +0100 | [diff] [blame] | 3819 | printk("%s tx data:\n", info->device_name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3820 | else |
Alexey Khoroshilov | 3d55399 | 2013-02-07 01:00:35 +0100 | [diff] [blame] | 3821 | printk("%s rx data:\n", info->device_name); |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 3822 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3823 | while(count) { |
| 3824 | if (count > 16) |
| 3825 | linecount = 16; |
| 3826 | else |
| 3827 | linecount = count; |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 3828 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3829 | for(i=0;i<linecount;i++) |
Alexey Khoroshilov | 3d55399 | 2013-02-07 01:00:35 +0100 | [diff] [blame] | 3830 | printk("%02X ", (unsigned char)data[i]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3831 | for(;i<17;i++) |
| 3832 | printk(" "); |
| 3833 | for(i=0;i<linecount;i++) { |
| 3834 | if (data[i]>=040 && data[i]<=0176) |
Alexey Khoroshilov | 3d55399 | 2013-02-07 01:00:35 +0100 | [diff] [blame] | 3835 | printk("%c", data[i]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3836 | else |
| 3837 | printk("."); |
| 3838 | } |
| 3839 | printk("\n"); |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 3840 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3841 | data += linecount; |
| 3842 | count -= linecount; |
| 3843 | } |
| 3844 | } |
| 3845 | |
| 3846 | /* HDLC frame time out |
| 3847 | * update stats and do tx completion processing |
| 3848 | */ |
Peter Hagervall | cdaad34 | 2006-06-23 02:06:04 -0700 | [diff] [blame] | 3849 | static void tx_timeout(unsigned long context) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3850 | { |
| 3851 | MGSLPC_INFO *info = (MGSLPC_INFO*)context; |
| 3852 | unsigned long flags; |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 3853 | |
Alexey Khoroshilov | 3d55399 | 2013-02-07 01:00:35 +0100 | [diff] [blame] | 3854 | if (debug_level >= DEBUG_LEVEL_INFO) |
| 3855 | printk("%s(%d):tx_timeout(%s)\n", |
| 3856 | __FILE__, __LINE__, info->device_name); |
| 3857 | if (info->tx_active && |
| 3858 | info->params.mode == MGSL_MODE_HDLC) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3859 | info->icount.txtimeout++; |
| 3860 | } |
Alexey Khoroshilov | 3d55399 | 2013-02-07 01:00:35 +0100 | [diff] [blame] | 3861 | spin_lock_irqsave(&info->lock, flags); |
Joe Perches | 0fab6de | 2008-04-28 02:14:02 -0700 | [diff] [blame] | 3862 | info->tx_active = false; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3863 | info->tx_count = info->tx_put = info->tx_get = 0; |
| 3864 | |
Alexey Khoroshilov | 3d55399 | 2013-02-07 01:00:35 +0100 | [diff] [blame] | 3865 | spin_unlock_irqrestore(&info->lock, flags); |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 3866 | |
Paul Fulghum | af69c7f | 2006-12-06 20:40:24 -0800 | [diff] [blame] | 3867 | #if SYNCLINK_GENERIC_HDLC |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3868 | if (info->netcount) |
| 3869 | hdlcdev_tx_done(info); |
| 3870 | else |
| 3871 | #endif |
Alan Cox | eeb4613 | 2009-01-02 13:48:47 +0000 | [diff] [blame] | 3872 | { |
| 3873 | struct tty_struct *tty = tty_port_tty_get(&info->port); |
| 3874 | bh_transmit(info, tty); |
| 3875 | tty_kref_put(tty); |
| 3876 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3877 | } |
| 3878 | |
Paul Fulghum | af69c7f | 2006-12-06 20:40:24 -0800 | [diff] [blame] | 3879 | #if SYNCLINK_GENERIC_HDLC |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3880 | |
| 3881 | /** |
| 3882 | * called by generic HDLC layer when protocol selected (PPP, frame relay, etc.) |
| 3883 | * set encoding and frame check sequence (FCS) options |
| 3884 | * |
| 3885 | * dev pointer to network device structure |
| 3886 | * encoding serial encoding setting |
| 3887 | * parity FCS setting |
| 3888 | * |
| 3889 | * returns 0 if success, otherwise error code |
| 3890 | */ |
| 3891 | static int hdlcdev_attach(struct net_device *dev, unsigned short encoding, |
| 3892 | unsigned short parity) |
| 3893 | { |
| 3894 | MGSLPC_INFO *info = dev_to_port(dev); |
Alan Cox | eeb4613 | 2009-01-02 13:48:47 +0000 | [diff] [blame] | 3895 | struct tty_struct *tty; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3896 | unsigned char new_encoding; |
| 3897 | unsigned short new_crctype; |
| 3898 | |
| 3899 | /* return error if TTY interface open */ |
Alan Cox | eeb4613 | 2009-01-02 13:48:47 +0000 | [diff] [blame] | 3900 | if (info->port.count) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3901 | return -EBUSY; |
| 3902 | |
| 3903 | switch (encoding) |
| 3904 | { |
| 3905 | case ENCODING_NRZ: new_encoding = HDLC_ENCODING_NRZ; break; |
| 3906 | case ENCODING_NRZI: new_encoding = HDLC_ENCODING_NRZI_SPACE; break; |
| 3907 | case ENCODING_FM_MARK: new_encoding = HDLC_ENCODING_BIPHASE_MARK; break; |
| 3908 | case ENCODING_FM_SPACE: new_encoding = HDLC_ENCODING_BIPHASE_SPACE; break; |
| 3909 | case ENCODING_MANCHESTER: new_encoding = HDLC_ENCODING_BIPHASE_LEVEL; break; |
| 3910 | default: return -EINVAL; |
| 3911 | } |
| 3912 | |
| 3913 | switch (parity) |
| 3914 | { |
| 3915 | case PARITY_NONE: new_crctype = HDLC_CRC_NONE; break; |
| 3916 | case PARITY_CRC16_PR1_CCITT: new_crctype = HDLC_CRC_16_CCITT; break; |
| 3917 | case PARITY_CRC32_PR1_CCITT: new_crctype = HDLC_CRC_32_CCITT; break; |
| 3918 | default: return -EINVAL; |
| 3919 | } |
| 3920 | |
| 3921 | info->params.encoding = new_encoding; |
Alexey Dobriyan | 53b3531 | 2006-03-24 03:16:13 -0800 | [diff] [blame] | 3922 | info->params.crc_type = new_crctype; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3923 | |
| 3924 | /* if network interface up, reprogram hardware */ |
Alan Cox | eeb4613 | 2009-01-02 13:48:47 +0000 | [diff] [blame] | 3925 | if (info->netcount) { |
| 3926 | tty = tty_port_tty_get(&info->port); |
| 3927 | mgslpc_program_hw(info, tty); |
| 3928 | tty_kref_put(tty); |
| 3929 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3930 | |
| 3931 | return 0; |
| 3932 | } |
| 3933 | |
| 3934 | /** |
| 3935 | * called by generic HDLC layer to send frame |
| 3936 | * |
| 3937 | * skb socket buffer containing HDLC frame |
| 3938 | * dev pointer to network device structure |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3939 | */ |
Stephen Hemminger | 4c5d502 | 2009-08-31 19:50:48 +0000 | [diff] [blame] | 3940 | static netdev_tx_t hdlcdev_xmit(struct sk_buff *skb, |
| 3941 | struct net_device *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3942 | { |
| 3943 | MGSLPC_INFO *info = dev_to_port(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3944 | unsigned long flags; |
| 3945 | |
| 3946 | if (debug_level >= DEBUG_LEVEL_INFO) |
Alexey Khoroshilov | 3d55399 | 2013-02-07 01:00:35 +0100 | [diff] [blame] | 3947 | printk(KERN_INFO "%s:hdlc_xmit(%s)\n", __FILE__, dev->name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3948 | |
| 3949 | /* stop sending until this frame completes */ |
| 3950 | netif_stop_queue(dev); |
| 3951 | |
| 3952 | /* copy data to device buffers */ |
Arnaldo Carvalho de Melo | d626f62 | 2007-03-27 18:55:52 -0300 | [diff] [blame] | 3953 | skb_copy_from_linear_data(skb, info->tx_buf, skb->len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3954 | info->tx_get = 0; |
| 3955 | info->tx_put = info->tx_count = skb->len; |
| 3956 | |
| 3957 | /* update network statistics */ |
Krzysztof Halasa | 198191c | 2008-06-30 23:26:53 +0200 | [diff] [blame] | 3958 | dev->stats.tx_packets++; |
| 3959 | dev->stats.tx_bytes += skb->len; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3960 | |
| 3961 | /* done with socket buffer, so free it */ |
| 3962 | dev_kfree_skb(skb); |
| 3963 | |
| 3964 | /* save start time for transmit timeout detection */ |
Florian Westphal | 860e953 | 2016-05-03 16:33:13 +0200 | [diff] [blame] | 3965 | netif_trans_update(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3966 | |
| 3967 | /* start hardware transmitter if necessary */ |
Alexey Khoroshilov | 3d55399 | 2013-02-07 01:00:35 +0100 | [diff] [blame] | 3968 | spin_lock_irqsave(&info->lock, flags); |
Alan Cox | eeb4613 | 2009-01-02 13:48:47 +0000 | [diff] [blame] | 3969 | if (!info->tx_active) { |
| 3970 | struct tty_struct *tty = tty_port_tty_get(&info->port); |
Alexey Khoroshilov | 3d55399 | 2013-02-07 01:00:35 +0100 | [diff] [blame] | 3971 | tx_start(info, tty); |
| 3972 | tty_kref_put(tty); |
Alan Cox | eeb4613 | 2009-01-02 13:48:47 +0000 | [diff] [blame] | 3973 | } |
Alexey Khoroshilov | 3d55399 | 2013-02-07 01:00:35 +0100 | [diff] [blame] | 3974 | spin_unlock_irqrestore(&info->lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3975 | |
Stephen Hemminger | 4c5d502 | 2009-08-31 19:50:48 +0000 | [diff] [blame] | 3976 | return NETDEV_TX_OK; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3977 | } |
| 3978 | |
| 3979 | /** |
| 3980 | * called by network layer when interface enabled |
| 3981 | * claim resources and initialize hardware |
| 3982 | * |
| 3983 | * dev pointer to network device structure |
| 3984 | * |
| 3985 | * returns 0 if success, otherwise error code |
| 3986 | */ |
| 3987 | static int hdlcdev_open(struct net_device *dev) |
| 3988 | { |
| 3989 | MGSLPC_INFO *info = dev_to_port(dev); |
Alan Cox | eeb4613 | 2009-01-02 13:48:47 +0000 | [diff] [blame] | 3990 | struct tty_struct *tty; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3991 | int rc; |
| 3992 | unsigned long flags; |
| 3993 | |
| 3994 | if (debug_level >= DEBUG_LEVEL_INFO) |
Alexey Khoroshilov | 3d55399 | 2013-02-07 01:00:35 +0100 | [diff] [blame] | 3995 | printk("%s:hdlcdev_open(%s)\n", __FILE__, dev->name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3996 | |
| 3997 | /* generic HDLC layer open processing */ |
Alexey Khoroshilov | 3d55399 | 2013-02-07 01:00:35 +0100 | [diff] [blame] | 3998 | rc = hdlc_open(dev); |
| 3999 | if (rc != 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4000 | return rc; |
| 4001 | |
| 4002 | /* arbitrate between network and tty opens */ |
| 4003 | spin_lock_irqsave(&info->netlock, flags); |
Alan Cox | eeb4613 | 2009-01-02 13:48:47 +0000 | [diff] [blame] | 4004 | if (info->port.count != 0 || info->netcount != 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4005 | printk(KERN_WARNING "%s: hdlc_open returning busy\n", dev->name); |
| 4006 | spin_unlock_irqrestore(&info->netlock, flags); |
| 4007 | return -EBUSY; |
| 4008 | } |
| 4009 | info->netcount=1; |
| 4010 | spin_unlock_irqrestore(&info->netlock, flags); |
| 4011 | |
Alan Cox | eeb4613 | 2009-01-02 13:48:47 +0000 | [diff] [blame] | 4012 | tty = tty_port_tty_get(&info->port); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4013 | /* claim resources and init adapter */ |
Alexey Khoroshilov | 3d55399 | 2013-02-07 01:00:35 +0100 | [diff] [blame] | 4014 | rc = startup(info, tty); |
| 4015 | if (rc != 0) { |
Alan Cox | eeb4613 | 2009-01-02 13:48:47 +0000 | [diff] [blame] | 4016 | tty_kref_put(tty); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4017 | spin_lock_irqsave(&info->netlock, flags); |
| 4018 | info->netcount=0; |
| 4019 | spin_unlock_irqrestore(&info->netlock, flags); |
| 4020 | return rc; |
| 4021 | } |
Joe Perches | 9fe8074 | 2013-01-27 18:21:00 -0800 | [diff] [blame] | 4022 | /* assert RTS and DTR, apply hardware settings */ |
| 4023 | info->serial_signals |= SerialSignal_RTS | SerialSignal_DTR; |
Alan Cox | eeb4613 | 2009-01-02 13:48:47 +0000 | [diff] [blame] | 4024 | mgslpc_program_hw(info, tty); |
| 4025 | tty_kref_put(tty); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4026 | |
| 4027 | /* enable network layer transmit */ |
Florian Westphal | 860e953 | 2016-05-03 16:33:13 +0200 | [diff] [blame] | 4028 | netif_trans_update(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4029 | netif_start_queue(dev); |
| 4030 | |
| 4031 | /* inform generic HDLC layer of current DCD status */ |
| 4032 | spin_lock_irqsave(&info->lock, flags); |
| 4033 | get_signals(info); |
| 4034 | spin_unlock_irqrestore(&info->lock, flags); |
Krzysztof Halasa | fbeff3c | 2006-07-21 14:44:55 -0700 | [diff] [blame] | 4035 | if (info->serial_signals & SerialSignal_DCD) |
| 4036 | netif_carrier_on(dev); |
| 4037 | else |
| 4038 | netif_carrier_off(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4039 | return 0; |
| 4040 | } |
| 4041 | |
| 4042 | /** |
| 4043 | * called by network layer when interface is disabled |
| 4044 | * shutdown hardware and release resources |
| 4045 | * |
| 4046 | * dev pointer to network device structure |
| 4047 | * |
| 4048 | * returns 0 if success, otherwise error code |
| 4049 | */ |
| 4050 | static int hdlcdev_close(struct net_device *dev) |
| 4051 | { |
| 4052 | MGSLPC_INFO *info = dev_to_port(dev); |
Alan Cox | eeb4613 | 2009-01-02 13:48:47 +0000 | [diff] [blame] | 4053 | struct tty_struct *tty = tty_port_tty_get(&info->port); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4054 | unsigned long flags; |
| 4055 | |
| 4056 | if (debug_level >= DEBUG_LEVEL_INFO) |
Alexey Khoroshilov | 3d55399 | 2013-02-07 01:00:35 +0100 | [diff] [blame] | 4057 | printk("%s:hdlcdev_close(%s)\n", __FILE__, dev->name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4058 | |
| 4059 | netif_stop_queue(dev); |
| 4060 | |
| 4061 | /* shutdown adapter and release resources */ |
Alan Cox | eeb4613 | 2009-01-02 13:48:47 +0000 | [diff] [blame] | 4062 | shutdown(info, tty); |
| 4063 | tty_kref_put(tty); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4064 | hdlc_close(dev); |
| 4065 | |
| 4066 | spin_lock_irqsave(&info->netlock, flags); |
| 4067 | info->netcount=0; |
| 4068 | spin_unlock_irqrestore(&info->netlock, flags); |
| 4069 | |
| 4070 | return 0; |
| 4071 | } |
| 4072 | |
| 4073 | /** |
| 4074 | * called by network layer to process IOCTL call to network device |
| 4075 | * |
| 4076 | * dev pointer to network device structure |
| 4077 | * ifr pointer to network interface request structure |
| 4078 | * cmd IOCTL command code |
| 4079 | * |
| 4080 | * returns 0 if success, otherwise error code |
| 4081 | */ |
| 4082 | static int hdlcdev_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) |
| 4083 | { |
| 4084 | const size_t size = sizeof(sync_serial_settings); |
| 4085 | sync_serial_settings new_line; |
| 4086 | sync_serial_settings __user *line = ifr->ifr_settings.ifs_ifsu.sync; |
| 4087 | MGSLPC_INFO *info = dev_to_port(dev); |
| 4088 | unsigned int flags; |
| 4089 | |
| 4090 | if (debug_level >= DEBUG_LEVEL_INFO) |
Alexey Khoroshilov | 3d55399 | 2013-02-07 01:00:35 +0100 | [diff] [blame] | 4091 | printk("%s:hdlcdev_ioctl(%s)\n", __FILE__, dev->name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4092 | |
| 4093 | /* return error if TTY interface open */ |
Alan Cox | eeb4613 | 2009-01-02 13:48:47 +0000 | [diff] [blame] | 4094 | if (info->port.count) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4095 | return -EBUSY; |
| 4096 | |
| 4097 | if (cmd != SIOCWANDEV) |
| 4098 | return hdlc_ioctl(dev, ifr, cmd); |
| 4099 | |
Vasiliy Kulikov | 5b917a1 | 2010-10-17 18:41:24 +0400 | [diff] [blame] | 4100 | memset(&new_line, 0, size); |
| 4101 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4102 | switch(ifr->ifr_settings.type) { |
| 4103 | case IF_GET_IFACE: /* return current sync_serial_settings */ |
| 4104 | |
| 4105 | ifr->ifr_settings.type = IF_IFACE_SYNC_SERIAL; |
| 4106 | if (ifr->ifr_settings.size < size) { |
| 4107 | ifr->ifr_settings.size = size; /* data size wanted */ |
| 4108 | return -ENOBUFS; |
| 4109 | } |
| 4110 | |
| 4111 | flags = info->params.flags & (HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_RXC_DPLL | |
| 4112 | HDLC_FLAG_RXC_BRG | HDLC_FLAG_RXC_TXCPIN | |
| 4113 | HDLC_FLAG_TXC_TXCPIN | HDLC_FLAG_TXC_DPLL | |
| 4114 | HDLC_FLAG_TXC_BRG | HDLC_FLAG_TXC_RXCPIN); |
| 4115 | |
| 4116 | switch (flags){ |
| 4117 | case (HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_TXC_TXCPIN): new_line.clock_type = CLOCK_EXT; break; |
| 4118 | case (HDLC_FLAG_RXC_BRG | HDLC_FLAG_TXC_BRG): new_line.clock_type = CLOCK_INT; break; |
| 4119 | case (HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_TXC_BRG): new_line.clock_type = CLOCK_TXINT; break; |
| 4120 | case (HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_TXC_RXCPIN): new_line.clock_type = CLOCK_TXFROMRX; break; |
| 4121 | default: new_line.clock_type = CLOCK_DEFAULT; |
| 4122 | } |
| 4123 | |
| 4124 | new_line.clock_rate = info->params.clock_speed; |
| 4125 | new_line.loopback = info->params.loopback ? 1:0; |
| 4126 | |
| 4127 | if (copy_to_user(line, &new_line, size)) |
| 4128 | return -EFAULT; |
| 4129 | return 0; |
| 4130 | |
| 4131 | case IF_IFACE_SYNC_SERIAL: /* set sync_serial_settings */ |
| 4132 | |
| 4133 | if(!capable(CAP_NET_ADMIN)) |
| 4134 | return -EPERM; |
| 4135 | if (copy_from_user(&new_line, line, size)) |
| 4136 | return -EFAULT; |
| 4137 | |
| 4138 | switch (new_line.clock_type) |
| 4139 | { |
| 4140 | case CLOCK_EXT: flags = HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_TXC_TXCPIN; break; |
| 4141 | case CLOCK_TXFROMRX: flags = HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_TXC_RXCPIN; break; |
| 4142 | case CLOCK_INT: flags = HDLC_FLAG_RXC_BRG | HDLC_FLAG_TXC_BRG; break; |
| 4143 | case CLOCK_TXINT: flags = HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_TXC_BRG; break; |
| 4144 | case CLOCK_DEFAULT: flags = info->params.flags & |
| 4145 | (HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_RXC_DPLL | |
| 4146 | HDLC_FLAG_RXC_BRG | HDLC_FLAG_RXC_TXCPIN | |
| 4147 | HDLC_FLAG_TXC_TXCPIN | HDLC_FLAG_TXC_DPLL | |
| 4148 | HDLC_FLAG_TXC_BRG | HDLC_FLAG_TXC_RXCPIN); break; |
| 4149 | default: return -EINVAL; |
| 4150 | } |
| 4151 | |
| 4152 | if (new_line.loopback != 0 && new_line.loopback != 1) |
| 4153 | return -EINVAL; |
| 4154 | |
| 4155 | info->params.flags &= ~(HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_RXC_DPLL | |
| 4156 | HDLC_FLAG_RXC_BRG | HDLC_FLAG_RXC_TXCPIN | |
| 4157 | HDLC_FLAG_TXC_TXCPIN | HDLC_FLAG_TXC_DPLL | |
| 4158 | HDLC_FLAG_TXC_BRG | HDLC_FLAG_TXC_RXCPIN); |
| 4159 | info->params.flags |= flags; |
| 4160 | |
| 4161 | info->params.loopback = new_line.loopback; |
| 4162 | |
| 4163 | if (flags & (HDLC_FLAG_RXC_BRG | HDLC_FLAG_TXC_BRG)) |
| 4164 | info->params.clock_speed = new_line.clock_rate; |
| 4165 | else |
| 4166 | info->params.clock_speed = 0; |
| 4167 | |
| 4168 | /* if network interface up, reprogram hardware */ |
Alan Cox | eeb4613 | 2009-01-02 13:48:47 +0000 | [diff] [blame] | 4169 | if (info->netcount) { |
| 4170 | struct tty_struct *tty = tty_port_tty_get(&info->port); |
| 4171 | mgslpc_program_hw(info, tty); |
| 4172 | tty_kref_put(tty); |
| 4173 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4174 | return 0; |
| 4175 | |
| 4176 | default: |
| 4177 | return hdlc_ioctl(dev, ifr, cmd); |
| 4178 | } |
| 4179 | } |
| 4180 | |
| 4181 | /** |
| 4182 | * called by network layer when transmit timeout is detected |
| 4183 | * |
| 4184 | * dev pointer to network device structure |
| 4185 | */ |
| 4186 | static void hdlcdev_tx_timeout(struct net_device *dev) |
| 4187 | { |
| 4188 | MGSLPC_INFO *info = dev_to_port(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4189 | unsigned long flags; |
| 4190 | |
| 4191 | if (debug_level >= DEBUG_LEVEL_INFO) |
Alexey Khoroshilov | 3d55399 | 2013-02-07 01:00:35 +0100 | [diff] [blame] | 4192 | printk("hdlcdev_tx_timeout(%s)\n", dev->name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4193 | |
Krzysztof Halasa | 198191c | 2008-06-30 23:26:53 +0200 | [diff] [blame] | 4194 | dev->stats.tx_errors++; |
| 4195 | dev->stats.tx_aborted_errors++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4196 | |
Alexey Khoroshilov | 3d55399 | 2013-02-07 01:00:35 +0100 | [diff] [blame] | 4197 | spin_lock_irqsave(&info->lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4198 | tx_stop(info); |
Alexey Khoroshilov | 3d55399 | 2013-02-07 01:00:35 +0100 | [diff] [blame] | 4199 | spin_unlock_irqrestore(&info->lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4200 | |
| 4201 | netif_wake_queue(dev); |
| 4202 | } |
| 4203 | |
| 4204 | /** |
| 4205 | * called by device driver when transmit completes |
| 4206 | * reenable network layer transmit if stopped |
| 4207 | * |
| 4208 | * info pointer to device instance information |
| 4209 | */ |
| 4210 | static void hdlcdev_tx_done(MGSLPC_INFO *info) |
| 4211 | { |
| 4212 | if (netif_queue_stopped(info->netdev)) |
| 4213 | netif_wake_queue(info->netdev); |
| 4214 | } |
| 4215 | |
| 4216 | /** |
| 4217 | * called by device driver when frame received |
| 4218 | * pass frame to network layer |
| 4219 | * |
| 4220 | * info pointer to device instance information |
| 4221 | * buf pointer to buffer contianing frame data |
| 4222 | * size count of data bytes in buf |
| 4223 | */ |
| 4224 | static void hdlcdev_rx(MGSLPC_INFO *info, char *buf, int size) |
| 4225 | { |
| 4226 | struct sk_buff *skb = dev_alloc_skb(size); |
| 4227 | struct net_device *dev = info->netdev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4228 | |
| 4229 | if (debug_level >= DEBUG_LEVEL_INFO) |
Alexey Khoroshilov | 3d55399 | 2013-02-07 01:00:35 +0100 | [diff] [blame] | 4230 | printk("hdlcdev_rx(%s)\n", dev->name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4231 | |
| 4232 | if (skb == NULL) { |
| 4233 | printk(KERN_NOTICE "%s: can't alloc skb, dropping packet\n", dev->name); |
Krzysztof Halasa | 198191c | 2008-06-30 23:26:53 +0200 | [diff] [blame] | 4234 | dev->stats.rx_dropped++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4235 | return; |
| 4236 | } |
| 4237 | |
Krzysztof Halasa | 198191c | 2008-06-30 23:26:53 +0200 | [diff] [blame] | 4238 | memcpy(skb_put(skb, size), buf, size); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4239 | |
Krzysztof Halasa | 198191c | 2008-06-30 23:26:53 +0200 | [diff] [blame] | 4240 | skb->protocol = hdlc_type_trans(skb, dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4241 | |
Krzysztof Halasa | 198191c | 2008-06-30 23:26:53 +0200 | [diff] [blame] | 4242 | dev->stats.rx_packets++; |
| 4243 | dev->stats.rx_bytes += size; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4244 | |
| 4245 | netif_rx(skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4246 | } |
| 4247 | |
Krzysztof Hałasa | 991990a | 2009-01-08 22:52:11 +0100 | [diff] [blame] | 4248 | static const struct net_device_ops hdlcdev_ops = { |
| 4249 | .ndo_open = hdlcdev_open, |
| 4250 | .ndo_stop = hdlcdev_close, |
| 4251 | .ndo_change_mtu = hdlc_change_mtu, |
| 4252 | .ndo_start_xmit = hdlc_start_xmit, |
| 4253 | .ndo_do_ioctl = hdlcdev_ioctl, |
| 4254 | .ndo_tx_timeout = hdlcdev_tx_timeout, |
| 4255 | }; |
| 4256 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4257 | /** |
| 4258 | * called by device driver when adding device instance |
| 4259 | * do generic HDLC initialization |
| 4260 | * |
| 4261 | * info pointer to device instance information |
| 4262 | * |
| 4263 | * returns 0 if success, otherwise error code |
| 4264 | */ |
| 4265 | static int hdlcdev_init(MGSLPC_INFO *info) |
| 4266 | { |
| 4267 | int rc; |
| 4268 | struct net_device *dev; |
| 4269 | hdlc_device *hdlc; |
| 4270 | |
| 4271 | /* allocate and initialize network and HDLC layer objects */ |
| 4272 | |
Alexey Khoroshilov | 3d55399 | 2013-02-07 01:00:35 +0100 | [diff] [blame] | 4273 | dev = alloc_hdlcdev(info); |
| 4274 | if (dev == NULL) { |
| 4275 | printk(KERN_ERR "%s:hdlc device allocation failure\n", __FILE__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4276 | return -ENOMEM; |
| 4277 | } |
| 4278 | |
| 4279 | /* for network layer reporting purposes only */ |
| 4280 | dev->base_addr = info->io_base; |
| 4281 | dev->irq = info->irq_level; |
| 4282 | |
| 4283 | /* network layer callbacks and settings */ |
Krzysztof Hałasa | 991990a | 2009-01-08 22:52:11 +0100 | [diff] [blame] | 4284 | dev->netdev_ops = &hdlcdev_ops; |
| 4285 | dev->watchdog_timeo = 10 * HZ; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4286 | dev->tx_queue_len = 50; |
| 4287 | |
| 4288 | /* generic HDLC layer callbacks and settings */ |
| 4289 | hdlc = dev_to_hdlc(dev); |
| 4290 | hdlc->attach = hdlcdev_attach; |
| 4291 | hdlc->xmit = hdlcdev_xmit; |
| 4292 | |
| 4293 | /* register objects with HDLC layer */ |
Alexey Khoroshilov | 3d55399 | 2013-02-07 01:00:35 +0100 | [diff] [blame] | 4294 | rc = register_hdlc_device(dev); |
| 4295 | if (rc) { |
| 4296 | printk(KERN_WARNING "%s:unable to register hdlc device\n", __FILE__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4297 | free_netdev(dev); |
| 4298 | return rc; |
| 4299 | } |
| 4300 | |
| 4301 | info->netdev = dev; |
| 4302 | return 0; |
| 4303 | } |
| 4304 | |
| 4305 | /** |
| 4306 | * called by device driver when removing device instance |
| 4307 | * do generic HDLC cleanup |
| 4308 | * |
| 4309 | * info pointer to device instance information |
| 4310 | */ |
| 4311 | static void hdlcdev_exit(MGSLPC_INFO *info) |
| 4312 | { |
| 4313 | unregister_hdlc_device(info->netdev); |
| 4314 | free_netdev(info->netdev); |
| 4315 | info->netdev = NULL; |
| 4316 | } |
| 4317 | |
| 4318 | #endif /* CONFIG_HDLC */ |
| 4319 | |