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 | |
| 105 | typedef struct |
| 106 | { |
| 107 | int count; |
| 108 | unsigned char status; |
| 109 | char data[1]; |
| 110 | } RXBUF; |
| 111 | |
| 112 | /* The queue of BH actions to be performed */ |
| 113 | |
| 114 | #define BH_RECEIVE 1 |
| 115 | #define BH_TRANSMIT 2 |
| 116 | #define BH_STATUS 4 |
| 117 | |
| 118 | #define IO_PIN_SHUTDOWN_LIMIT 100 |
| 119 | |
| 120 | #define RELEVANT_IFLAG(iflag) (iflag & (IGNBRK|BRKINT|IGNPAR|PARMRK|INPCK)) |
| 121 | |
| 122 | struct _input_signal_events { |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 123 | int ri_up; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 124 | int ri_down; |
| 125 | int dsr_up; |
| 126 | int dsr_down; |
| 127 | int dcd_up; |
| 128 | int dcd_down; |
| 129 | int cts_up; |
| 130 | int cts_down; |
| 131 | }; |
| 132 | |
| 133 | |
| 134 | /* |
| 135 | * Device instance data structure |
| 136 | */ |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 137 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 138 | typedef struct _mgslpc_info { |
Alan Cox | eeb4613 | 2009-01-02 13:48:47 +0000 | [diff] [blame] | 139 | struct tty_port port; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 140 | void *if_ptr; /* General purpose pointer (used by SPPP) */ |
| 141 | int magic; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 142 | int line; |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 143 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 144 | struct mgsl_icount icount; |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 145 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 146 | int timeout; |
| 147 | int x_char; /* xon/xoff character */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 148 | unsigned char read_status_mask; |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 149 | unsigned char ignore_status_mask; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 150 | |
| 151 | unsigned char *tx_buf; |
| 152 | int tx_put; |
| 153 | int tx_get; |
| 154 | int tx_count; |
| 155 | |
| 156 | /* circular list of fixed length rx buffers */ |
| 157 | |
| 158 | unsigned char *rx_buf; /* memory allocated for all rx buffers */ |
| 159 | int rx_buf_total_size; /* size of memory allocated for rx buffers */ |
| 160 | int rx_put; /* index of next empty rx buffer */ |
| 161 | int rx_get; /* index of next full rx buffer */ |
| 162 | int rx_buf_size; /* size in bytes of single rx buffer */ |
| 163 | int rx_buf_count; /* total number of rx buffers */ |
| 164 | int rx_frame_count; /* number of full rx buffers */ |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 165 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 166 | wait_queue_head_t status_event_wait_q; |
| 167 | wait_queue_head_t event_wait_q; |
| 168 | struct timer_list tx_timer; /* HDLC transmit timeout timer */ |
| 169 | struct _mgslpc_info *next_device; /* device list link */ |
| 170 | |
| 171 | unsigned short imra_value; |
| 172 | unsigned short imrb_value; |
| 173 | unsigned char pim_value; |
| 174 | |
| 175 | spinlock_t lock; |
| 176 | struct work_struct task; /* task structure for scheduling bh */ |
| 177 | |
| 178 | u32 max_frame_size; |
| 179 | |
| 180 | u32 pending_bh; |
| 181 | |
Joe Perches | 0fab6de | 2008-04-28 02:14:02 -0700 | [diff] [blame] | 182 | bool bh_running; |
| 183 | bool bh_requested; |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 184 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 185 | int dcd_chkcount; /* check counts to prevent */ |
| 186 | int cts_chkcount; /* too many IRQs if a signal */ |
| 187 | int dsr_chkcount; /* is floating */ |
| 188 | int ri_chkcount; |
| 189 | |
Joe Perches | 0fab6de | 2008-04-28 02:14:02 -0700 | [diff] [blame] | 190 | bool rx_enabled; |
| 191 | bool rx_overflow; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 192 | |
Joe Perches | 0fab6de | 2008-04-28 02:14:02 -0700 | [diff] [blame] | 193 | bool tx_enabled; |
| 194 | bool tx_active; |
| 195 | bool tx_aborting; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 196 | u32 idle_mode; |
| 197 | |
| 198 | int if_mode; /* serial interface selection (RS-232, v.35 etc) */ |
| 199 | |
| 200 | char device_name[25]; /* device instance name */ |
| 201 | |
| 202 | unsigned int io_base; /* base I/O address of adapter */ |
| 203 | unsigned int irq_level; |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 204 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 205 | MGSL_PARAMS params; /* communications parameters */ |
| 206 | |
| 207 | unsigned char serial_signals; /* current serial signal states */ |
| 208 | |
Joe Perches | 0fab6de | 2008-04-28 02:14:02 -0700 | [diff] [blame] | 209 | bool irq_occurred; /* for diagnostics use */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 210 | char testing_irq; |
| 211 | unsigned int init_error; /* startup error (DIAGS) */ |
| 212 | |
Paul Fulghum | a6b68a6 | 2012-12-03 11:13:24 -0600 | [diff] [blame] | 213 | char *flag_buf; |
Joe Perches | 0fab6de | 2008-04-28 02:14:02 -0700 | [diff] [blame] | 214 | bool drop_rts_on_tx_done; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 215 | |
| 216 | struct _input_signal_events input_signal_events; |
| 217 | |
| 218 | /* PCMCIA support */ |
Dominik Brodowski | fd23823 | 2006-03-05 10:45:09 +0100 | [diff] [blame] | 219 | struct pcmcia_device *p_dev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 220 | int stop; |
| 221 | |
| 222 | /* SPPP/Cisco HDLC device parts */ |
| 223 | int netcount; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 224 | spinlock_t netlock; |
| 225 | |
Paul Fulghum | af69c7f | 2006-12-06 20:40:24 -0800 | [diff] [blame] | 226 | #if SYNCLINK_GENERIC_HDLC |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 227 | struct net_device *netdev; |
| 228 | #endif |
| 229 | |
| 230 | } MGSLPC_INFO; |
| 231 | |
| 232 | #define MGSLPC_MAGIC 0x5402 |
| 233 | |
| 234 | /* |
| 235 | * The size of the serial xmit buffer is 1 page, or 4096 bytes |
| 236 | */ |
| 237 | #define TXBUFSIZE 4096 |
| 238 | |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 239 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 240 | #define CHA 0x00 /* channel A offset */ |
| 241 | #define CHB 0x40 /* channel B offset */ |
| 242 | |
| 243 | /* |
| 244 | * FIXME: PPC has PVR defined in asm/reg.h. For now we just undef it. |
| 245 | */ |
| 246 | #undef PVR |
| 247 | |
| 248 | #define RXFIFO 0 |
| 249 | #define TXFIFO 0 |
| 250 | #define STAR 0x20 |
| 251 | #define CMDR 0x20 |
| 252 | #define RSTA 0x21 |
| 253 | #define PRE 0x21 |
| 254 | #define MODE 0x22 |
| 255 | #define TIMR 0x23 |
| 256 | #define XAD1 0x24 |
| 257 | #define XAD2 0x25 |
| 258 | #define RAH1 0x26 |
| 259 | #define RAH2 0x27 |
| 260 | #define DAFO 0x27 |
| 261 | #define RAL1 0x28 |
| 262 | #define RFC 0x28 |
| 263 | #define RHCR 0x29 |
| 264 | #define RAL2 0x29 |
| 265 | #define RBCL 0x2a |
| 266 | #define XBCL 0x2a |
| 267 | #define RBCH 0x2b |
| 268 | #define XBCH 0x2b |
| 269 | #define CCR0 0x2c |
| 270 | #define CCR1 0x2d |
| 271 | #define CCR2 0x2e |
| 272 | #define CCR3 0x2f |
| 273 | #define VSTR 0x34 |
| 274 | #define BGR 0x34 |
| 275 | #define RLCR 0x35 |
| 276 | #define AML 0x36 |
| 277 | #define AMH 0x37 |
| 278 | #define GIS 0x38 |
| 279 | #define IVA 0x38 |
| 280 | #define IPC 0x39 |
| 281 | #define ISR 0x3a |
| 282 | #define IMR 0x3a |
| 283 | #define PVR 0x3c |
| 284 | #define PIS 0x3d |
| 285 | #define PIM 0x3d |
| 286 | #define PCR 0x3e |
| 287 | #define CCR4 0x3f |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 288 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 289 | // IMR/ISR |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 290 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 291 | #define IRQ_BREAK_ON BIT15 // rx break detected |
| 292 | #define IRQ_DATAOVERRUN BIT14 // receive data overflow |
| 293 | #define IRQ_ALLSENT BIT13 // all sent |
| 294 | #define IRQ_UNDERRUN BIT12 // transmit data underrun |
| 295 | #define IRQ_TIMER BIT11 // timer interrupt |
| 296 | #define IRQ_CTS BIT10 // CTS status change |
| 297 | #define IRQ_TXREPEAT BIT9 // tx message repeat |
| 298 | #define IRQ_TXFIFO BIT8 // transmit pool ready |
| 299 | #define IRQ_RXEOM BIT7 // receive message end |
| 300 | #define IRQ_EXITHUNT BIT6 // receive frame start |
| 301 | #define IRQ_RXTIME BIT6 // rx char timeout |
| 302 | #define IRQ_DCD BIT2 // carrier detect status change |
| 303 | #define IRQ_OVERRUN BIT1 // receive frame overflow |
| 304 | #define IRQ_RXFIFO BIT0 // receive pool full |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 305 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 306 | // STAR |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 307 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 308 | #define XFW BIT6 // transmit FIFO write enable |
| 309 | #define CEC BIT2 // command executing |
| 310 | #define CTS BIT1 // CTS state |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 311 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 312 | #define PVR_DTR BIT0 |
| 313 | #define PVR_DSR BIT1 |
| 314 | #define PVR_RI BIT2 |
| 315 | #define PVR_AUTOCTS BIT3 |
| 316 | #define PVR_RS232 0x20 /* 0010b */ |
| 317 | #define PVR_V35 0xe0 /* 1110b */ |
| 318 | #define PVR_RS422 0x40 /* 0100b */ |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 319 | |
| 320 | /* Register access functions */ |
| 321 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 322 | #define write_reg(info, reg, val) outb((val),(info)->io_base + (reg)) |
| 323 | #define read_reg(info, reg) inb((info)->io_base + (reg)) |
| 324 | |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 325 | #define read_reg16(info, reg) inw((info)->io_base + (reg)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 326 | #define write_reg16(info, reg, val) outw((val), (info)->io_base + (reg)) |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 327 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 328 | #define set_reg_bits(info, reg, mask) \ |
| 329 | write_reg(info, (reg), \ |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 330 | (unsigned char) (read_reg(info, (reg)) | (mask))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 331 | #define clear_reg_bits(info, reg, mask) \ |
| 332 | write_reg(info, (reg), \ |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 333 | (unsigned char) (read_reg(info, (reg)) & ~(mask))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 334 | /* |
| 335 | * interrupt enable/disable routines |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 336 | */ |
| 337 | 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] | 338 | { |
| 339 | if (channel == CHA) { |
| 340 | info->imra_value |= mask; |
| 341 | write_reg16(info, CHA + IMR, info->imra_value); |
| 342 | } else { |
| 343 | info->imrb_value |= mask; |
| 344 | write_reg16(info, CHB + IMR, info->imrb_value); |
| 345 | } |
| 346 | } |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 347 | 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] | 348 | { |
| 349 | if (channel == CHA) { |
| 350 | info->imra_value &= ~mask; |
| 351 | write_reg16(info, CHA + IMR, info->imra_value); |
| 352 | } else { |
| 353 | info->imrb_value &= ~mask; |
| 354 | write_reg16(info, CHB + IMR, info->imrb_value); |
| 355 | } |
| 356 | } |
| 357 | |
| 358 | #define port_irq_disable(info, mask) \ |
| 359 | { info->pim_value |= (mask); write_reg(info, PIM, info->pim_value); } |
| 360 | |
| 361 | #define port_irq_enable(info, mask) \ |
| 362 | { info->pim_value &= ~(mask); write_reg(info, PIM, info->pim_value); } |
| 363 | |
| 364 | static void rx_start(MGSLPC_INFO *info); |
| 365 | static void rx_stop(MGSLPC_INFO *info); |
| 366 | |
Alan Cox | eeb4613 | 2009-01-02 13:48:47 +0000 | [diff] [blame] | 367 | static void tx_start(MGSLPC_INFO *info, struct tty_struct *tty); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 368 | static void tx_stop(MGSLPC_INFO *info); |
| 369 | static void tx_set_idle(MGSLPC_INFO *info); |
| 370 | |
| 371 | static void get_signals(MGSLPC_INFO *info); |
| 372 | static void set_signals(MGSLPC_INFO *info); |
| 373 | |
| 374 | static void reset_device(MGSLPC_INFO *info); |
| 375 | |
| 376 | static void hdlc_mode(MGSLPC_INFO *info); |
| 377 | static void async_mode(MGSLPC_INFO *info); |
| 378 | |
| 379 | static void tx_timeout(unsigned long context); |
| 380 | |
Alan Cox | eeb4613 | 2009-01-02 13:48:47 +0000 | [diff] [blame] | 381 | static int carrier_raised(struct tty_port *port); |
Alan Cox | fcc8ac1 | 2009-06-11 12:24:17 +0100 | [diff] [blame] | 382 | static void dtr_rts(struct tty_port *port, int onoff); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 383 | |
Paul Fulghum | af69c7f | 2006-12-06 20:40:24 -0800 | [diff] [blame] | 384 | #if SYNCLINK_GENERIC_HDLC |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 385 | #define dev_to_port(D) (dev_to_hdlc(D)->priv) |
| 386 | static void hdlcdev_tx_done(MGSLPC_INFO *info); |
| 387 | static void hdlcdev_rx(MGSLPC_INFO *info, char *buf, int size); |
| 388 | static int hdlcdev_init(MGSLPC_INFO *info); |
| 389 | static void hdlcdev_exit(MGSLPC_INFO *info); |
| 390 | #endif |
| 391 | |
| 392 | static void trace_block(MGSLPC_INFO *info,const char* data, int count, int xmit); |
| 393 | |
Joe Perches | 0fab6de | 2008-04-28 02:14:02 -0700 | [diff] [blame] | 394 | static bool register_test(MGSLPC_INFO *info); |
| 395 | static bool irq_test(MGSLPC_INFO *info); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 396 | static int adapter_test(MGSLPC_INFO *info); |
| 397 | |
| 398 | static int claim_resources(MGSLPC_INFO *info); |
| 399 | static void release_resources(MGSLPC_INFO *info); |
| 400 | static void mgslpc_add_device(MGSLPC_INFO *info); |
| 401 | static void mgslpc_remove_device(MGSLPC_INFO *info); |
| 402 | |
Alan Cox | eeb4613 | 2009-01-02 13:48:47 +0000 | [diff] [blame] | 403 | static bool rx_get_frame(MGSLPC_INFO *info, struct tty_struct *tty); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 404 | static void rx_reset_buffers(MGSLPC_INFO *info); |
| 405 | static int rx_alloc_buffers(MGSLPC_INFO *info); |
| 406 | static void rx_free_buffers(MGSLPC_INFO *info); |
| 407 | |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 408 | static irqreturn_t mgslpc_isr(int irq, void *dev_id); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 409 | |
| 410 | /* |
| 411 | * Bottom half interrupt handlers |
| 412 | */ |
David Howells | c402895 | 2006-11-22 14:57:56 +0000 | [diff] [blame] | 413 | static void bh_handler(struct work_struct *work); |
Alan Cox | eeb4613 | 2009-01-02 13:48:47 +0000 | [diff] [blame] | 414 | static void bh_transmit(MGSLPC_INFO *info, struct tty_struct *tty); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 415 | static void bh_status(MGSLPC_INFO *info); |
| 416 | |
| 417 | /* |
| 418 | * ioctl handlers |
| 419 | */ |
Alan Cox | 60b33c1 | 2011-02-14 16:26:14 +0000 | [diff] [blame] | 420 | static int tiocmget(struct tty_struct *tty); |
Alan Cox | 20b9d17 | 2011-02-14 16:26:50 +0000 | [diff] [blame] | 421 | static int tiocmset(struct tty_struct *tty, |
| 422 | unsigned int set, unsigned int clear); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 423 | static int get_stats(MGSLPC_INFO *info, struct mgsl_icount __user *user_icount); |
| 424 | static int get_params(MGSLPC_INFO *info, MGSL_PARAMS __user *user_params); |
Alan Cox | eeb4613 | 2009-01-02 13:48:47 +0000 | [diff] [blame] | 425 | 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] | 426 | static int get_txidle(MGSLPC_INFO *info, int __user *idle_mode); |
| 427 | static int set_txidle(MGSLPC_INFO *info, int idle_mode); |
Alan Cox | eeb4613 | 2009-01-02 13:48:47 +0000 | [diff] [blame] | 428 | 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] | 429 | static int tx_abort(MGSLPC_INFO *info); |
| 430 | static int set_rxenable(MGSLPC_INFO *info, int enable); |
| 431 | static int wait_events(MGSLPC_INFO *info, int __user *mask); |
| 432 | |
| 433 | static MGSLPC_INFO *mgslpc_device_list = NULL; |
| 434 | static int mgslpc_device_count = 0; |
| 435 | |
| 436 | /* |
| 437 | * Set this param to non-zero to load eax with the |
| 438 | * .text section address and breakpoint on module load. |
| 439 | * This is useful for use with gdb and add-symbol-file command. |
| 440 | */ |
Rusty Russell | 90ab5ee | 2012-01-13 09:32:20 +1030 | [diff] [blame] | 441 | static bool break_on_load=0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 442 | |
| 443 | /* |
| 444 | * Driver major number, defaults to zero to get auto |
| 445 | * assigned major number. May be forced as module parameter. |
| 446 | */ |
| 447 | static int ttymajor=0; |
| 448 | |
| 449 | static int debug_level = 0; |
| 450 | static int maxframe[MAX_DEVICE_COUNT] = {0,}; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 451 | |
| 452 | module_param(break_on_load, bool, 0); |
| 453 | module_param(ttymajor, int, 0); |
| 454 | module_param(debug_level, int, 0); |
| 455 | module_param_array(maxframe, int, NULL, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 456 | |
| 457 | MODULE_LICENSE("GPL"); |
| 458 | |
| 459 | static char *driver_name = "SyncLink PC Card driver"; |
Paul Fulghum | a7482a2 | 2005-09-10 00:26:07 -0700 | [diff] [blame] | 460 | static char *driver_version = "$Revision: 4.34 $"; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 461 | |
| 462 | static struct tty_driver *serial_driver; |
| 463 | |
| 464 | /* number of characters left in xmit buffer before we ask for more */ |
| 465 | #define WAKEUP_CHARS 256 |
| 466 | |
Alan Cox | eeb4613 | 2009-01-02 13:48:47 +0000 | [diff] [blame] | 467 | static void mgslpc_change_params(MGSLPC_INFO *info, struct tty_struct *tty); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 468 | static void mgslpc_wait_until_sent(struct tty_struct *tty, int timeout); |
| 469 | |
| 470 | /* PCMCIA prototypes */ |
| 471 | |
Dominik Brodowski | 15b99ac | 2006-03-31 17:26:06 +0200 | [diff] [blame] | 472 | static int mgslpc_config(struct pcmcia_device *link); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 473 | static void mgslpc_release(u_long arg); |
Dominik Brodowski | cc3b486 | 2005-11-14 21:23:14 +0100 | [diff] [blame] | 474 | static void mgslpc_detach(struct pcmcia_device *p_dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 475 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 476 | /* |
| 477 | * 1st function defined in .text section. Calling this function in |
| 478 | * init_module() followed by a breakpoint allows a remote debugger |
| 479 | * (gdb) to get the .text address for the add-symbol-file command. |
| 480 | * This allows remote debugging of dynamically loadable modules. |
| 481 | */ |
| 482 | static void* mgslpc_get_text_ptr(void) |
| 483 | { |
| 484 | return mgslpc_get_text_ptr; |
| 485 | } |
| 486 | |
| 487 | /** |
| 488 | * line discipline callback wrappers |
| 489 | * |
| 490 | * The wrappers maintain line discipline references |
| 491 | * while calling into the line discipline. |
| 492 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 493 | * ldisc_receive_buf - pass receive data to line discipline |
| 494 | */ |
| 495 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 496 | static void ldisc_receive_buf(struct tty_struct *tty, |
| 497 | const __u8 *data, char *flags, int count) |
| 498 | { |
| 499 | struct tty_ldisc *ld; |
| 500 | if (!tty) |
| 501 | return; |
| 502 | ld = tty_ldisc_ref(tty); |
| 503 | if (ld) { |
Alan Cox | a352def | 2008-07-16 21:53:12 +0100 | [diff] [blame] | 504 | if (ld->ops->receive_buf) |
| 505 | ld->ops->receive_buf(tty, data, flags, count); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 506 | tty_ldisc_deref(ld); |
| 507 | } |
| 508 | } |
| 509 | |
Alan Cox | eeb4613 | 2009-01-02 13:48:47 +0000 | [diff] [blame] | 510 | static const struct tty_port_operations mgslpc_port_ops = { |
| 511 | .carrier_raised = carrier_raised, |
Alan Cox | fcc8ac1 | 2009-06-11 12:24:17 +0100 | [diff] [blame] | 512 | .dtr_rts = dtr_rts |
Alan Cox | eeb4613 | 2009-01-02 13:48:47 +0000 | [diff] [blame] | 513 | }; |
| 514 | |
Dominik Brodowski | 15b99ac | 2006-03-31 17:26:06 +0200 | [diff] [blame] | 515 | static int mgslpc_probe(struct pcmcia_device *link) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 516 | { |
| 517 | MGSLPC_INFO *info; |
Dominik Brodowski | 15b99ac | 2006-03-31 17:26:06 +0200 | [diff] [blame] | 518 | int ret; |
Dominik Brodowski | fd23823 | 2006-03-05 10:45:09 +0100 | [diff] [blame] | 519 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 520 | if (debug_level >= DEBUG_LEVEL_INFO) |
| 521 | printk("mgslpc_attach\n"); |
Dominik Brodowski | fd23823 | 2006-03-05 10:45:09 +0100 | [diff] [blame] | 522 | |
Yoann Padioleau | dd00cc4 | 2007-07-19 01:49:03 -0700 | [diff] [blame] | 523 | info = kzalloc(sizeof(MGSLPC_INFO), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 524 | if (!info) { |
| 525 | printk("Error can't allocate device instance data\n"); |
Dominik Brodowski | f8cfa61 | 2005-11-14 21:25:51 +0100 | [diff] [blame] | 526 | return -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 527 | } |
| 528 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 529 | info->magic = MGSLPC_MAGIC; |
Alan Cox | eeb4613 | 2009-01-02 13:48:47 +0000 | [diff] [blame] | 530 | tty_port_init(&info->port); |
| 531 | info->port.ops = &mgslpc_port_ops; |
David Howells | c402895 | 2006-11-22 14:57:56 +0000 | [diff] [blame] | 532 | INIT_WORK(&info->task, bh_handler); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 533 | info->max_frame_size = 4096; |
Alan Cox | eeb4613 | 2009-01-02 13:48:47 +0000 | [diff] [blame] | 534 | info->port.close_delay = 5*HZ/10; |
| 535 | info->port.closing_wait = 30*HZ; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 536 | init_waitqueue_head(&info->status_event_wait_q); |
| 537 | init_waitqueue_head(&info->event_wait_q); |
| 538 | spin_lock_init(&info->lock); |
| 539 | spin_lock_init(&info->netlock); |
| 540 | memcpy(&info->params,&default_params,sizeof(MGSL_PARAMS)); |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 541 | info->idle_mode = HDLC_TXIDLE_FLAGS; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 542 | info->imra_value = 0xffff; |
| 543 | info->imrb_value = 0xffff; |
| 544 | info->pim_value = 0xff; |
| 545 | |
Dominik Brodowski | fba395e | 2006-03-31 17:21:06 +0200 | [diff] [blame] | 546 | info->p_dev = link; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 547 | link->priv = info; |
Dominik Brodowski | fd23823 | 2006-03-05 10:45:09 +0100 | [diff] [blame] | 548 | |
Dominik Brodowski | fba395e | 2006-03-31 17:21:06 +0200 | [diff] [blame] | 549 | /* Initialize the struct pcmcia_device structure */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 550 | |
Dominik Brodowski | 15b99ac | 2006-03-31 17:26:06 +0200 | [diff] [blame] | 551 | ret = mgslpc_config(link); |
Jiri Slaby | 191c5f1 | 2012-11-15 09:49:56 +0100 | [diff] [blame] | 552 | if (ret) { |
| 553 | tty_port_destroy(&info->port); |
Dominik Brodowski | 15b99ac | 2006-03-31 17:26:06 +0200 | [diff] [blame] | 554 | return ret; |
Jiri Slaby | 191c5f1 | 2012-11-15 09:49:56 +0100 | [diff] [blame] | 555 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 556 | |
| 557 | mgslpc_add_device(info); |
| 558 | |
Dominik Brodowski | f8cfa61 | 2005-11-14 21:25:51 +0100 | [diff] [blame] | 559 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 560 | } |
| 561 | |
| 562 | /* Card has been inserted. |
| 563 | */ |
| 564 | |
Dominik Brodowski | 00990e7 | 2010-07-30 13:13:46 +0200 | [diff] [blame] | 565 | static int mgslpc_ioprobe(struct pcmcia_device *p_dev, void *priv_data) |
Dominik Brodowski | aaa8cfd | 2009-10-18 18:28:39 +0200 | [diff] [blame] | 566 | { |
Dominik Brodowski | 90abdc3 | 2010-07-24 17:23:51 +0200 | [diff] [blame] | 567 | return pcmcia_request_io(p_dev); |
Dominik Brodowski | aaa8cfd | 2009-10-18 18:28:39 +0200 | [diff] [blame] | 568 | } |
| 569 | |
Dominik Brodowski | 15b99ac | 2006-03-31 17:26:06 +0200 | [diff] [blame] | 570 | static int mgslpc_config(struct pcmcia_device *link) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 571 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 572 | MGSLPC_INFO *info = link->priv; |
Dominik Brodowski | cbf624f | 2009-10-24 15:47:29 +0200 | [diff] [blame] | 573 | int ret; |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 574 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 575 | if (debug_level >= DEBUG_LEVEL_INFO) |
| 576 | printk("mgslpc_config(0x%p)\n", link); |
| 577 | |
Dominik Brodowski | 00990e7 | 2010-07-30 13:13:46 +0200 | [diff] [blame] | 578 | link->config_flags |= CONF_ENABLE_IRQ | CONF_AUTO_SET_IO; |
| 579 | |
Dominik Brodowski | cbf624f | 2009-10-24 15:47:29 +0200 | [diff] [blame] | 580 | ret = pcmcia_loop_config(link, mgslpc_ioprobe, NULL); |
| 581 | if (ret != 0) |
| 582 | goto failed; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 583 | |
Dominik Brodowski | 7feabb6 | 2010-07-29 18:35:47 +0200 | [diff] [blame] | 584 | link->config_index = 8; |
| 585 | link->config_regs = PRESENT_OPTION; |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 586 | |
Dominik Brodowski | eb14120 | 2010-03-07 12:21:16 +0100 | [diff] [blame] | 587 | ret = pcmcia_request_irq(link, mgslpc_isr); |
Dominik Brodowski | cbf624f | 2009-10-24 15:47:29 +0200 | [diff] [blame] | 588 | if (ret) |
| 589 | goto failed; |
Dominik Brodowski | 1ac71e5 | 2010-07-29 19:27:09 +0200 | [diff] [blame] | 590 | ret = pcmcia_enable_device(link); |
Dominik Brodowski | cbf624f | 2009-10-24 15:47:29 +0200 | [diff] [blame] | 591 | if (ret) |
| 592 | goto failed; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 593 | |
Dominik Brodowski | 9a017a9 | 2010-07-24 15:58:54 +0200 | [diff] [blame] | 594 | info->io_base = link->resource[0]->start; |
Dominik Brodowski | eb14120 | 2010-03-07 12:21:16 +0100 | [diff] [blame] | 595 | info->irq_level = link->irq; |
Dominik Brodowski | 15b99ac | 2006-03-31 17:26:06 +0200 | [diff] [blame] | 596 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 597 | |
Dominik Brodowski | cbf624f | 2009-10-24 15:47:29 +0200 | [diff] [blame] | 598 | failed: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 599 | mgslpc_release((u_long)link); |
Dominik Brodowski | 15b99ac | 2006-03-31 17:26:06 +0200 | [diff] [blame] | 600 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 601 | } |
| 602 | |
| 603 | /* Card has been removed. |
| 604 | * Unregister device and release PCMCIA configuration. |
| 605 | * If device is open, postpone until it is closed. |
| 606 | */ |
| 607 | static void mgslpc_release(u_long arg) |
| 608 | { |
Dominik Brodowski | e2d4096 | 2006-03-02 00:09:29 +0100 | [diff] [blame] | 609 | struct pcmcia_device *link = (struct pcmcia_device *)arg; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 610 | |
Dominik Brodowski | e2d4096 | 2006-03-02 00:09:29 +0100 | [diff] [blame] | 611 | if (debug_level >= DEBUG_LEVEL_INFO) |
| 612 | printk("mgslpc_release(0x%p)\n", link); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 613 | |
Dominik Brodowski | e2d4096 | 2006-03-02 00:09:29 +0100 | [diff] [blame] | 614 | pcmcia_disable_device(link); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 615 | } |
| 616 | |
Dominik Brodowski | fba395e | 2006-03-31 17:21:06 +0200 | [diff] [blame] | 617 | static void mgslpc_detach(struct pcmcia_device *link) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 618 | { |
Dominik Brodowski | e2d4096 | 2006-03-02 00:09:29 +0100 | [diff] [blame] | 619 | if (debug_level >= DEBUG_LEVEL_INFO) |
| 620 | printk("mgslpc_detach(0x%p)\n", link); |
Dominik Brodowski | cc3b486 | 2005-11-14 21:23:14 +0100 | [diff] [blame] | 621 | |
Dominik Brodowski | e2d4096 | 2006-03-02 00:09:29 +0100 | [diff] [blame] | 622 | ((MGSLPC_INFO *)link->priv)->stop = 1; |
| 623 | mgslpc_release((u_long)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 | mgslpc_remove_device((MGSLPC_INFO *)link->priv); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 626 | } |
| 627 | |
Dominik Brodowski | fba395e | 2006-03-31 17:21:06 +0200 | [diff] [blame] | 628 | static int mgslpc_suspend(struct pcmcia_device *link) |
Dominik Brodowski | 98e4c28 | 2005-11-14 21:21:18 +0100 | [diff] [blame] | 629 | { |
Dominik Brodowski | 98e4c28 | 2005-11-14 21:21:18 +0100 | [diff] [blame] | 630 | MGSLPC_INFO *info = link->priv; |
| 631 | |
Dominik Brodowski | 98e4c28 | 2005-11-14 21:21:18 +0100 | [diff] [blame] | 632 | info->stop = 1; |
Dominik Brodowski | 98e4c28 | 2005-11-14 21:21:18 +0100 | [diff] [blame] | 633 | |
| 634 | return 0; |
| 635 | } |
| 636 | |
Dominik Brodowski | fba395e | 2006-03-31 17:21:06 +0200 | [diff] [blame] | 637 | static int mgslpc_resume(struct pcmcia_device *link) |
Dominik Brodowski | 98e4c28 | 2005-11-14 21:21:18 +0100 | [diff] [blame] | 638 | { |
Dominik Brodowski | 98e4c28 | 2005-11-14 21:21:18 +0100 | [diff] [blame] | 639 | MGSLPC_INFO *info = link->priv; |
| 640 | |
Dominik Brodowski | 98e4c28 | 2005-11-14 21:21:18 +0100 | [diff] [blame] | 641 | info->stop = 0; |
| 642 | |
| 643 | return 0; |
| 644 | } |
| 645 | |
| 646 | |
Joe Perches | 0fab6de | 2008-04-28 02:14:02 -0700 | [diff] [blame] | 647 | static inline bool mgslpc_paranoia_check(MGSLPC_INFO *info, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 648 | char *name, const char *routine) |
| 649 | { |
| 650 | #ifdef MGSLPC_PARANOIA_CHECK |
| 651 | static const char *badmagic = |
| 652 | "Warning: bad magic number for mgsl struct (%s) in %s\n"; |
| 653 | static const char *badinfo = |
| 654 | "Warning: null mgslpc_info for (%s) in %s\n"; |
| 655 | |
| 656 | if (!info) { |
| 657 | printk(badinfo, name, routine); |
Joe Perches | 0fab6de | 2008-04-28 02:14:02 -0700 | [diff] [blame] | 658 | return true; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 659 | } |
| 660 | if (info->magic != MGSLPC_MAGIC) { |
| 661 | printk(badmagic, name, routine); |
Joe Perches | 0fab6de | 2008-04-28 02:14:02 -0700 | [diff] [blame] | 662 | return true; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 663 | } |
| 664 | #else |
| 665 | if (!info) |
Joe Perches | 0fab6de | 2008-04-28 02:14:02 -0700 | [diff] [blame] | 666 | return true; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 667 | #endif |
Joe Perches | 0fab6de | 2008-04-28 02:14:02 -0700 | [diff] [blame] | 668 | return false; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 669 | } |
| 670 | |
| 671 | |
| 672 | #define CMD_RXFIFO BIT7 // release current rx FIFO |
| 673 | #define CMD_RXRESET BIT6 // receiver reset |
| 674 | #define CMD_RXFIFO_READ BIT5 |
| 675 | #define CMD_START_TIMER BIT4 |
| 676 | #define CMD_TXFIFO BIT3 // release current tx FIFO |
| 677 | #define CMD_TXEOM BIT1 // transmit end message |
| 678 | #define CMD_TXRESET BIT0 // transmit reset |
| 679 | |
Joe Perches | 0fab6de | 2008-04-28 02:14:02 -0700 | [diff] [blame] | 680 | static bool wait_command_complete(MGSLPC_INFO *info, unsigned char channel) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 681 | { |
| 682 | int i = 0; |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 683 | /* wait for command completion */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 684 | while (read_reg(info, (unsigned char)(channel+STAR)) & BIT2) { |
| 685 | udelay(1); |
| 686 | if (i++ == 1000) |
Joe Perches | 0fab6de | 2008-04-28 02:14:02 -0700 | [diff] [blame] | 687 | return false; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 688 | } |
Joe Perches | 0fab6de | 2008-04-28 02:14:02 -0700 | [diff] [blame] | 689 | return true; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 690 | } |
| 691 | |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 692 | 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] | 693 | { |
| 694 | wait_command_complete(info, channel); |
| 695 | write_reg(info, (unsigned char) (channel + CMDR), cmd); |
| 696 | } |
| 697 | |
| 698 | static void tx_pause(struct tty_struct *tty) |
| 699 | { |
| 700 | MGSLPC_INFO *info = (MGSLPC_INFO *)tty->driver_data; |
| 701 | unsigned long flags; |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 702 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 703 | if (mgslpc_paranoia_check(info, tty->name, "tx_pause")) |
| 704 | return; |
| 705 | if (debug_level >= DEBUG_LEVEL_INFO) |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 706 | printk("tx_pause(%s)\n",info->device_name); |
| 707 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 708 | spin_lock_irqsave(&info->lock,flags); |
| 709 | if (info->tx_enabled) |
| 710 | tx_stop(info); |
| 711 | spin_unlock_irqrestore(&info->lock,flags); |
| 712 | } |
| 713 | |
| 714 | static void tx_release(struct tty_struct *tty) |
| 715 | { |
| 716 | MGSLPC_INFO *info = (MGSLPC_INFO *)tty->driver_data; |
| 717 | unsigned long flags; |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 718 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 719 | if (mgslpc_paranoia_check(info, tty->name, "tx_release")) |
| 720 | return; |
| 721 | if (debug_level >= DEBUG_LEVEL_INFO) |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 722 | printk("tx_release(%s)\n",info->device_name); |
| 723 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 724 | spin_lock_irqsave(&info->lock,flags); |
| 725 | if (!info->tx_enabled) |
Alan Cox | eeb4613 | 2009-01-02 13:48:47 +0000 | [diff] [blame] | 726 | tx_start(info, tty); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 727 | spin_unlock_irqrestore(&info->lock,flags); |
| 728 | } |
| 729 | |
| 730 | /* Return next bottom half action to perform. |
| 731 | * or 0 if nothing to do. |
| 732 | */ |
| 733 | static int bh_action(MGSLPC_INFO *info) |
| 734 | { |
| 735 | unsigned long flags; |
| 736 | int rc = 0; |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 737 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 738 | spin_lock_irqsave(&info->lock,flags); |
| 739 | |
| 740 | if (info->pending_bh & BH_RECEIVE) { |
| 741 | info->pending_bh &= ~BH_RECEIVE; |
| 742 | rc = BH_RECEIVE; |
| 743 | } else if (info->pending_bh & BH_TRANSMIT) { |
| 744 | info->pending_bh &= ~BH_TRANSMIT; |
| 745 | rc = BH_TRANSMIT; |
| 746 | } else if (info->pending_bh & BH_STATUS) { |
| 747 | info->pending_bh &= ~BH_STATUS; |
| 748 | rc = BH_STATUS; |
| 749 | } |
| 750 | |
| 751 | if (!rc) { |
| 752 | /* Mark BH routine as complete */ |
Joe Perches | 0fab6de | 2008-04-28 02:14:02 -0700 | [diff] [blame] | 753 | info->bh_running = false; |
| 754 | info->bh_requested = false; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 755 | } |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 756 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 757 | spin_unlock_irqrestore(&info->lock,flags); |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 758 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 759 | return rc; |
| 760 | } |
| 761 | |
David Howells | c402895 | 2006-11-22 14:57:56 +0000 | [diff] [blame] | 762 | static void bh_handler(struct work_struct *work) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 763 | { |
David Howells | c402895 | 2006-11-22 14:57:56 +0000 | [diff] [blame] | 764 | MGSLPC_INFO *info = container_of(work, MGSLPC_INFO, task); |
Alan Cox | eeb4613 | 2009-01-02 13:48:47 +0000 | [diff] [blame] | 765 | struct tty_struct *tty; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 766 | int action; |
| 767 | |
| 768 | if (!info) |
| 769 | return; |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 770 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 771 | if (debug_level >= DEBUG_LEVEL_BH) |
| 772 | printk( "%s(%d):bh_handler(%s) entry\n", |
| 773 | __FILE__,__LINE__,info->device_name); |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 774 | |
Joe Perches | 0fab6de | 2008-04-28 02:14:02 -0700 | [diff] [blame] | 775 | info->bh_running = true; |
Alan Cox | eeb4613 | 2009-01-02 13:48:47 +0000 | [diff] [blame] | 776 | tty = tty_port_tty_get(&info->port); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 777 | |
| 778 | while((action = bh_action(info)) != 0) { |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 779 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 780 | /* Process work item */ |
| 781 | if ( debug_level >= DEBUG_LEVEL_BH ) |
| 782 | printk( "%s(%d):bh_handler() work item action=%d\n", |
| 783 | __FILE__,__LINE__,action); |
| 784 | |
| 785 | switch (action) { |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 786 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 787 | case BH_RECEIVE: |
Alan Cox | eeb4613 | 2009-01-02 13:48:47 +0000 | [diff] [blame] | 788 | while(rx_get_frame(info, tty)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 789 | break; |
| 790 | case BH_TRANSMIT: |
Alan Cox | eeb4613 | 2009-01-02 13:48:47 +0000 | [diff] [blame] | 791 | bh_transmit(info, tty); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 792 | break; |
| 793 | case BH_STATUS: |
| 794 | bh_status(info); |
| 795 | break; |
| 796 | default: |
| 797 | /* unknown work item ID */ |
| 798 | printk("Unknown work item ID=%08X!\n", action); |
| 799 | break; |
| 800 | } |
| 801 | } |
| 802 | |
Alan Cox | eeb4613 | 2009-01-02 13:48:47 +0000 | [diff] [blame] | 803 | tty_kref_put(tty); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 804 | if (debug_level >= DEBUG_LEVEL_BH) |
| 805 | printk( "%s(%d):bh_handler(%s) exit\n", |
| 806 | __FILE__,__LINE__,info->device_name); |
| 807 | } |
| 808 | |
Alan Cox | eeb4613 | 2009-01-02 13:48:47 +0000 | [diff] [blame] | 809 | static void bh_transmit(MGSLPC_INFO *info, struct tty_struct *tty) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 810 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 811 | if (debug_level >= DEBUG_LEVEL_BH) |
| 812 | printk("bh_transmit() entry on %s\n", info->device_name); |
| 813 | |
Jiri Slaby | b963a84 | 2007-02-10 01:44:55 -0800 | [diff] [blame] | 814 | if (tty) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 815 | tty_wakeup(tty); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 816 | } |
| 817 | |
Peter Hagervall | cdaad34 | 2006-06-23 02:06:04 -0700 | [diff] [blame] | 818 | static void bh_status(MGSLPC_INFO *info) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 819 | { |
| 820 | info->ri_chkcount = 0; |
| 821 | info->dsr_chkcount = 0; |
| 822 | info->dcd_chkcount = 0; |
| 823 | info->cts_chkcount = 0; |
| 824 | } |
| 825 | |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 826 | /* eom: non-zero = end of frame */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 827 | static void rx_ready_hdlc(MGSLPC_INFO *info, int eom) |
| 828 | { |
| 829 | unsigned char data[2]; |
| 830 | unsigned char fifo_count, read_count, i; |
| 831 | RXBUF *buf = (RXBUF*)(info->rx_buf + (info->rx_put * info->rx_buf_size)); |
| 832 | |
| 833 | if (debug_level >= DEBUG_LEVEL_ISR) |
| 834 | printk("%s(%d):rx_ready_hdlc(eom=%d)\n",__FILE__,__LINE__,eom); |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 835 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 836 | if (!info->rx_enabled) |
| 837 | return; |
| 838 | |
| 839 | if (info->rx_frame_count >= info->rx_buf_count) { |
| 840 | /* no more free buffers */ |
| 841 | issue_command(info, CHA, CMD_RXRESET); |
| 842 | info->pending_bh |= BH_RECEIVE; |
Joe Perches | 0fab6de | 2008-04-28 02:14:02 -0700 | [diff] [blame] | 843 | info->rx_overflow = true; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 844 | info->icount.buf_overrun++; |
| 845 | return; |
| 846 | } |
| 847 | |
| 848 | if (eom) { |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 849 | /* end of frame, get FIFO count from RBCL register */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 850 | if (!(fifo_count = (unsigned char)(read_reg(info, CHA+RBCL) & 0x1f))) |
| 851 | fifo_count = 32; |
| 852 | } else |
| 853 | fifo_count = 32; |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 854 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 855 | do { |
| 856 | if (fifo_count == 1) { |
| 857 | read_count = 1; |
| 858 | data[0] = read_reg(info, CHA + RXFIFO); |
| 859 | } else { |
| 860 | read_count = 2; |
| 861 | *((unsigned short *) data) = read_reg16(info, CHA + RXFIFO); |
| 862 | } |
| 863 | fifo_count -= read_count; |
| 864 | if (!fifo_count && eom) |
| 865 | buf->status = data[--read_count]; |
| 866 | |
| 867 | for (i = 0; i < read_count; i++) { |
| 868 | if (buf->count >= info->max_frame_size) { |
| 869 | /* frame too large, reset receiver and reset current buffer */ |
| 870 | issue_command(info, CHA, CMD_RXRESET); |
| 871 | buf->count = 0; |
| 872 | return; |
| 873 | } |
| 874 | *(buf->data + buf->count) = data[i]; |
| 875 | buf->count++; |
| 876 | } |
| 877 | } while (fifo_count); |
| 878 | |
| 879 | if (eom) { |
| 880 | info->pending_bh |= BH_RECEIVE; |
| 881 | info->rx_frame_count++; |
| 882 | info->rx_put++; |
| 883 | if (info->rx_put >= info->rx_buf_count) |
| 884 | info->rx_put = 0; |
| 885 | } |
| 886 | issue_command(info, CHA, CMD_RXFIFO); |
| 887 | } |
| 888 | |
Alan Cox | eeb4613 | 2009-01-02 13:48:47 +0000 | [diff] [blame] | 889 | static void rx_ready_async(MGSLPC_INFO *info, int tcd, struct tty_struct *tty) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 890 | { |
Jiri Slaby | 227434f | 2013-01-03 15:53:01 +0100 | [diff] [blame^] | 891 | struct tty_port *port = &info->port; |
Alan Cox | 33f0f88 | 2006-01-09 20:54:13 -0800 | [diff] [blame] | 892 | unsigned char data, status, flag; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 893 | int fifo_count; |
Alan Cox | 33f0f88 | 2006-01-09 20:54:13 -0800 | [diff] [blame] | 894 | int work = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 895 | struct mgsl_icount *icount = &info->icount; |
| 896 | |
Alexey Khoroshilov | 221b7b5 | 2012-09-15 01:29:37 +0400 | [diff] [blame] | 897 | if (!tty) { |
| 898 | /* tty is not available anymore */ |
| 899 | issue_command(info, CHA, CMD_RXRESET); |
| 900 | if (debug_level >= DEBUG_LEVEL_ISR) |
| 901 | printk("%s(%d):rx_ready_async(tty=NULL)\n",__FILE__,__LINE__); |
| 902 | return; |
| 903 | } |
| 904 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 905 | if (tcd) { |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 906 | /* early termination, get FIFO count from RBCL register */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 907 | fifo_count = (unsigned char)(read_reg(info, CHA+RBCL) & 0x1f); |
| 908 | |
| 909 | /* Zero fifo count could mean 0 or 32 bytes available. |
| 910 | * If BIT5 of STAR is set then at least 1 byte is available. |
| 911 | */ |
| 912 | if (!fifo_count && (read_reg(info,CHA+STAR) & BIT5)) |
| 913 | fifo_count = 32; |
| 914 | } else |
| 915 | fifo_count = 32; |
Alan Cox | 33f0f88 | 2006-01-09 20:54:13 -0800 | [diff] [blame] | 916 | |
Jiri Slaby | 227434f | 2013-01-03 15:53:01 +0100 | [diff] [blame^] | 917 | tty_buffer_request_room(port, fifo_count); |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 918 | /* Flush received async data to receive data buffer. */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 919 | while (fifo_count) { |
| 920 | data = read_reg(info, CHA + RXFIFO); |
| 921 | status = read_reg(info, CHA + RXFIFO); |
| 922 | fifo_count -= 2; |
| 923 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 924 | icount->rx++; |
Alan Cox | 33f0f88 | 2006-01-09 20:54:13 -0800 | [diff] [blame] | 925 | flag = TTY_NORMAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 926 | |
| 927 | // if no frameing/crc error then save data |
| 928 | // BIT7:parity error |
| 929 | // BIT6:framing error |
| 930 | |
| 931 | if (status & (BIT7 + BIT6)) { |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 932 | if (status & BIT7) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 933 | icount->parity++; |
| 934 | else |
| 935 | icount->frame++; |
| 936 | |
| 937 | /* discard char if tty control flags say so */ |
| 938 | if (status & info->ignore_status_mask) |
| 939 | continue; |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 940 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 941 | status &= info->read_status_mask; |
| 942 | |
| 943 | if (status & BIT7) |
Alan Cox | 33f0f88 | 2006-01-09 20:54:13 -0800 | [diff] [blame] | 944 | flag = TTY_PARITY; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 945 | else if (status & BIT6) |
Alan Cox | 33f0f88 | 2006-01-09 20:54:13 -0800 | [diff] [blame] | 946 | flag = TTY_FRAME; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 947 | } |
Alan Cox | 33f0f88 | 2006-01-09 20:54:13 -0800 | [diff] [blame] | 948 | work += tty_insert_flip_char(tty, data, flag); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 949 | } |
| 950 | issue_command(info, CHA, CMD_RXFIFO); |
| 951 | |
| 952 | if (debug_level >= DEBUG_LEVEL_ISR) { |
Alan Cox | 33f0f88 | 2006-01-09 20:54:13 -0800 | [diff] [blame] | 953 | printk("%s(%d):rx_ready_async", |
| 954 | __FILE__,__LINE__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 955 | printk("%s(%d):rx=%d brk=%d parity=%d frame=%d overrun=%d\n", |
| 956 | __FILE__,__LINE__,icount->rx,icount->brk, |
| 957 | icount->parity,icount->frame,icount->overrun); |
| 958 | } |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 959 | |
Alan Cox | 33f0f88 | 2006-01-09 20:54:13 -0800 | [diff] [blame] | 960 | if (work) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 961 | tty_flip_buffer_push(tty); |
| 962 | } |
| 963 | |
| 964 | |
Alan Cox | eeb4613 | 2009-01-02 13:48:47 +0000 | [diff] [blame] | 965 | static void tx_done(MGSLPC_INFO *info, struct tty_struct *tty) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 966 | { |
| 967 | if (!info->tx_active) |
| 968 | return; |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 969 | |
Joe Perches | 0fab6de | 2008-04-28 02:14:02 -0700 | [diff] [blame] | 970 | info->tx_active = false; |
| 971 | info->tx_aborting = false; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 972 | |
| 973 | if (info->params.mode == MGSL_MODE_ASYNC) |
| 974 | return; |
| 975 | |
| 976 | info->tx_count = info->tx_put = info->tx_get = 0; |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 977 | del_timer(&info->tx_timer); |
| 978 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 979 | if (info->drop_rts_on_tx_done) { |
| 980 | get_signals(info); |
| 981 | if (info->serial_signals & SerialSignal_RTS) { |
| 982 | info->serial_signals &= ~SerialSignal_RTS; |
| 983 | set_signals(info); |
| 984 | } |
Joe Perches | 0fab6de | 2008-04-28 02:14:02 -0700 | [diff] [blame] | 985 | info->drop_rts_on_tx_done = false; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 986 | } |
| 987 | |
Paul Fulghum | af69c7f | 2006-12-06 20:40:24 -0800 | [diff] [blame] | 988 | #if SYNCLINK_GENERIC_HDLC |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 989 | if (info->netcount) |
| 990 | hdlcdev_tx_done(info); |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 991 | else |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 992 | #endif |
| 993 | { |
Alexey Khoroshilov | 221b7b5 | 2012-09-15 01:29:37 +0400 | [diff] [blame] | 994 | if (tty && (tty->stopped || tty->hw_stopped)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 995 | tx_stop(info); |
| 996 | return; |
| 997 | } |
| 998 | info->pending_bh |= BH_TRANSMIT; |
| 999 | } |
| 1000 | } |
| 1001 | |
Alan Cox | eeb4613 | 2009-01-02 13:48:47 +0000 | [diff] [blame] | 1002 | static void tx_ready(MGSLPC_INFO *info, struct tty_struct *tty) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1003 | { |
| 1004 | unsigned char fifo_count = 32; |
| 1005 | int c; |
| 1006 | |
| 1007 | if (debug_level >= DEBUG_LEVEL_ISR) |
| 1008 | printk("%s(%d):tx_ready(%s)\n", __FILE__,__LINE__,info->device_name); |
| 1009 | |
| 1010 | if (info->params.mode == MGSL_MODE_HDLC) { |
| 1011 | if (!info->tx_active) |
| 1012 | return; |
| 1013 | } else { |
Alexey Khoroshilov | 221b7b5 | 2012-09-15 01:29:37 +0400 | [diff] [blame] | 1014 | if (tty && (tty->stopped || tty->hw_stopped)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1015 | tx_stop(info); |
| 1016 | return; |
| 1017 | } |
| 1018 | if (!info->tx_count) |
Joe Perches | 0fab6de | 2008-04-28 02:14:02 -0700 | [diff] [blame] | 1019 | info->tx_active = false; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1020 | } |
| 1021 | |
| 1022 | if (!info->tx_count) |
| 1023 | return; |
| 1024 | |
| 1025 | while (info->tx_count && fifo_count) { |
| 1026 | 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] | 1027 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1028 | if (c == 1) { |
| 1029 | write_reg(info, CHA + TXFIFO, *(info->tx_buf + info->tx_get)); |
| 1030 | } else { |
| 1031 | write_reg16(info, CHA + TXFIFO, |
| 1032 | *((unsigned short*)(info->tx_buf + info->tx_get))); |
| 1033 | } |
| 1034 | info->tx_count -= c; |
| 1035 | info->tx_get = (info->tx_get + c) & (TXBUFSIZE - 1); |
| 1036 | fifo_count -= c; |
| 1037 | } |
| 1038 | |
| 1039 | if (info->params.mode == MGSL_MODE_ASYNC) { |
| 1040 | if (info->tx_count < WAKEUP_CHARS) |
| 1041 | info->pending_bh |= BH_TRANSMIT; |
| 1042 | issue_command(info, CHA, CMD_TXFIFO); |
| 1043 | } else { |
| 1044 | if (info->tx_count) |
| 1045 | issue_command(info, CHA, CMD_TXFIFO); |
| 1046 | else |
| 1047 | issue_command(info, CHA, CMD_TXFIFO + CMD_TXEOM); |
| 1048 | } |
| 1049 | } |
| 1050 | |
Alan Cox | eeb4613 | 2009-01-02 13:48:47 +0000 | [diff] [blame] | 1051 | static void cts_change(MGSLPC_INFO *info, struct tty_struct *tty) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1052 | { |
| 1053 | get_signals(info); |
| 1054 | if ((info->cts_chkcount)++ >= IO_PIN_SHUTDOWN_LIMIT) |
| 1055 | irq_disable(info, CHB, IRQ_CTS); |
| 1056 | info->icount.cts++; |
| 1057 | if (info->serial_signals & SerialSignal_CTS) |
| 1058 | info->input_signal_events.cts_up++; |
| 1059 | else |
| 1060 | info->input_signal_events.cts_down++; |
| 1061 | wake_up_interruptible(&info->status_event_wait_q); |
| 1062 | wake_up_interruptible(&info->event_wait_q); |
| 1063 | |
Linus Torvalds | 3498d13 | 2012-10-01 12:26:52 -0700 | [diff] [blame] | 1064 | if (tty && tty_port_cts_enabled(&info->port)) { |
Alan Cox | eeb4613 | 2009-01-02 13:48:47 +0000 | [diff] [blame] | 1065 | if (tty->hw_stopped) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1066 | if (info->serial_signals & SerialSignal_CTS) { |
| 1067 | if (debug_level >= DEBUG_LEVEL_ISR) |
| 1068 | printk("CTS tx start..."); |
Alexey Khoroshilov | 221b7b5 | 2012-09-15 01:29:37 +0400 | [diff] [blame] | 1069 | tty->hw_stopped = 0; |
Alan Cox | eeb4613 | 2009-01-02 13:48:47 +0000 | [diff] [blame] | 1070 | tx_start(info, tty); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1071 | info->pending_bh |= BH_TRANSMIT; |
| 1072 | return; |
| 1073 | } |
| 1074 | } else { |
| 1075 | if (!(info->serial_signals & SerialSignal_CTS)) { |
| 1076 | if (debug_level >= DEBUG_LEVEL_ISR) |
| 1077 | printk("CTS tx stop..."); |
Alexey Khoroshilov | 221b7b5 | 2012-09-15 01:29:37 +0400 | [diff] [blame] | 1078 | tty->hw_stopped = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1079 | tx_stop(info); |
| 1080 | } |
| 1081 | } |
| 1082 | } |
| 1083 | info->pending_bh |= BH_STATUS; |
| 1084 | } |
| 1085 | |
Alan Cox | eeb4613 | 2009-01-02 13:48:47 +0000 | [diff] [blame] | 1086 | static void dcd_change(MGSLPC_INFO *info, struct tty_struct *tty) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1087 | { |
| 1088 | get_signals(info); |
| 1089 | if ((info->dcd_chkcount)++ >= IO_PIN_SHUTDOWN_LIMIT) |
| 1090 | irq_disable(info, CHB, IRQ_DCD); |
| 1091 | info->icount.dcd++; |
| 1092 | if (info->serial_signals & SerialSignal_DCD) { |
| 1093 | info->input_signal_events.dcd_up++; |
| 1094 | } |
| 1095 | else |
| 1096 | info->input_signal_events.dcd_down++; |
Paul Fulghum | af69c7f | 2006-12-06 20:40:24 -0800 | [diff] [blame] | 1097 | #if SYNCLINK_GENERIC_HDLC |
Krzysztof Halasa | fbeff3c | 2006-07-21 14:44:55 -0700 | [diff] [blame] | 1098 | if (info->netcount) { |
| 1099 | if (info->serial_signals & SerialSignal_DCD) |
| 1100 | netif_carrier_on(info->netdev); |
| 1101 | else |
| 1102 | netif_carrier_off(info->netdev); |
| 1103 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1104 | #endif |
| 1105 | wake_up_interruptible(&info->status_event_wait_q); |
| 1106 | wake_up_interruptible(&info->event_wait_q); |
| 1107 | |
Alan Cox | eeb4613 | 2009-01-02 13:48:47 +0000 | [diff] [blame] | 1108 | if (info->port.flags & ASYNC_CHECK_CD) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1109 | if (debug_level >= DEBUG_LEVEL_ISR) |
| 1110 | printk("%s CD now %s...", info->device_name, |
| 1111 | (info->serial_signals & SerialSignal_DCD) ? "on" : "off"); |
| 1112 | if (info->serial_signals & SerialSignal_DCD) |
Alan Cox | eeb4613 | 2009-01-02 13:48:47 +0000 | [diff] [blame] | 1113 | wake_up_interruptible(&info->port.open_wait); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1114 | else { |
| 1115 | if (debug_level >= DEBUG_LEVEL_ISR) |
| 1116 | printk("doing serial hangup..."); |
Alan Cox | eeb4613 | 2009-01-02 13:48:47 +0000 | [diff] [blame] | 1117 | if (tty) |
| 1118 | tty_hangup(tty); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1119 | } |
| 1120 | } |
| 1121 | info->pending_bh |= BH_STATUS; |
| 1122 | } |
| 1123 | |
| 1124 | static void dsr_change(MGSLPC_INFO *info) |
| 1125 | { |
| 1126 | get_signals(info); |
| 1127 | if ((info->dsr_chkcount)++ >= IO_PIN_SHUTDOWN_LIMIT) |
| 1128 | port_irq_disable(info, PVR_DSR); |
| 1129 | info->icount.dsr++; |
| 1130 | if (info->serial_signals & SerialSignal_DSR) |
| 1131 | info->input_signal_events.dsr_up++; |
| 1132 | else |
| 1133 | info->input_signal_events.dsr_down++; |
| 1134 | wake_up_interruptible(&info->status_event_wait_q); |
| 1135 | wake_up_interruptible(&info->event_wait_q); |
| 1136 | info->pending_bh |= BH_STATUS; |
| 1137 | } |
| 1138 | |
| 1139 | static void ri_change(MGSLPC_INFO *info) |
| 1140 | { |
| 1141 | get_signals(info); |
| 1142 | if ((info->ri_chkcount)++ >= IO_PIN_SHUTDOWN_LIMIT) |
| 1143 | port_irq_disable(info, PVR_RI); |
| 1144 | info->icount.rng++; |
| 1145 | if (info->serial_signals & SerialSignal_RI) |
| 1146 | info->input_signal_events.ri_up++; |
| 1147 | else |
| 1148 | info->input_signal_events.ri_down++; |
| 1149 | wake_up_interruptible(&info->status_event_wait_q); |
| 1150 | wake_up_interruptible(&info->event_wait_q); |
| 1151 | info->pending_bh |= BH_STATUS; |
| 1152 | } |
| 1153 | |
| 1154 | /* Interrupt service routine entry point. |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 1155 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1156 | * Arguments: |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 1157 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1158 | * irq interrupt number that caused interrupt |
| 1159 | * dev_id device ID supplied during interrupt registration |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1160 | */ |
Jeff Garzik | a6f97b2 | 2007-10-31 05:20:49 -0400 | [diff] [blame] | 1161 | static irqreturn_t mgslpc_isr(int dummy, void *dev_id) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1162 | { |
Jeff Garzik | a6f97b2 | 2007-10-31 05:20:49 -0400 | [diff] [blame] | 1163 | MGSLPC_INFO *info = dev_id; |
Alan Cox | eeb4613 | 2009-01-02 13:48:47 +0000 | [diff] [blame] | 1164 | struct tty_struct *tty; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1165 | unsigned short isr; |
| 1166 | unsigned char gis, pis; |
| 1167 | int count=0; |
| 1168 | |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 1169 | if (debug_level >= DEBUG_LEVEL_ISR) |
Jeff Garzik | a6f97b2 | 2007-10-31 05:20:49 -0400 | [diff] [blame] | 1170 | printk("mgslpc_isr(%d) entry.\n", info->irq_level); |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 1171 | |
Dominik Brodowski | e2d4096 | 2006-03-02 00:09:29 +0100 | [diff] [blame] | 1172 | if (!(info->p_dev->_locked)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1173 | return IRQ_HANDLED; |
| 1174 | |
Alan Cox | eeb4613 | 2009-01-02 13:48:47 +0000 | [diff] [blame] | 1175 | tty = tty_port_tty_get(&info->port); |
| 1176 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1177 | spin_lock(&info->lock); |
| 1178 | |
| 1179 | while ((gis = read_reg(info, CHA + GIS))) { |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 1180 | if (debug_level >= DEBUG_LEVEL_ISR) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1181 | printk("mgslpc_isr %s gis=%04X\n", info->device_name,gis); |
| 1182 | |
| 1183 | if ((gis & 0x70) || count > 1000) { |
| 1184 | printk("synclink_cs:hardware failed or ejected\n"); |
| 1185 | break; |
| 1186 | } |
| 1187 | count++; |
| 1188 | |
| 1189 | if (gis & (BIT1 + BIT0)) { |
| 1190 | isr = read_reg16(info, CHB + ISR); |
| 1191 | if (isr & IRQ_DCD) |
Alan Cox | eeb4613 | 2009-01-02 13:48:47 +0000 | [diff] [blame] | 1192 | dcd_change(info, tty); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1193 | if (isr & IRQ_CTS) |
Alan Cox | eeb4613 | 2009-01-02 13:48:47 +0000 | [diff] [blame] | 1194 | cts_change(info, tty); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1195 | } |
| 1196 | if (gis & (BIT3 + BIT2)) |
| 1197 | { |
| 1198 | isr = read_reg16(info, CHA + ISR); |
| 1199 | if (isr & IRQ_TIMER) { |
Joe Perches | 0fab6de | 2008-04-28 02:14:02 -0700 | [diff] [blame] | 1200 | info->irq_occurred = true; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1201 | irq_disable(info, CHA, IRQ_TIMER); |
| 1202 | } |
| 1203 | |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 1204 | /* receive IRQs */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1205 | if (isr & IRQ_EXITHUNT) { |
| 1206 | info->icount.exithunt++; |
| 1207 | wake_up_interruptible(&info->event_wait_q); |
| 1208 | } |
| 1209 | if (isr & IRQ_BREAK_ON) { |
| 1210 | info->icount.brk++; |
Alan Cox | eeb4613 | 2009-01-02 13:48:47 +0000 | [diff] [blame] | 1211 | if (info->port.flags & ASYNC_SAK) |
| 1212 | do_SAK(tty); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1213 | } |
| 1214 | if (isr & IRQ_RXTIME) { |
| 1215 | issue_command(info, CHA, CMD_RXFIFO_READ); |
| 1216 | } |
| 1217 | if (isr & (IRQ_RXEOM + IRQ_RXFIFO)) { |
| 1218 | if (info->params.mode == MGSL_MODE_HDLC) |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 1219 | rx_ready_hdlc(info, isr & IRQ_RXEOM); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1220 | else |
Alan Cox | eeb4613 | 2009-01-02 13:48:47 +0000 | [diff] [blame] | 1221 | rx_ready_async(info, isr & IRQ_RXEOM, tty); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1222 | } |
| 1223 | |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 1224 | /* transmit IRQs */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1225 | if (isr & IRQ_UNDERRUN) { |
| 1226 | if (info->tx_aborting) |
| 1227 | info->icount.txabort++; |
| 1228 | else |
| 1229 | info->icount.txunder++; |
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_ALLSENT) { |
| 1233 | info->icount.txok++; |
Alan Cox | eeb4613 | 2009-01-02 13:48:47 +0000 | [diff] [blame] | 1234 | tx_done(info, tty); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1235 | } |
| 1236 | else if (isr & IRQ_TXFIFO) |
Alan Cox | eeb4613 | 2009-01-02 13:48:47 +0000 | [diff] [blame] | 1237 | tx_ready(info, tty); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1238 | } |
| 1239 | if (gis & BIT7) { |
| 1240 | pis = read_reg(info, CHA + PIS); |
| 1241 | if (pis & BIT1) |
| 1242 | dsr_change(info); |
| 1243 | if (pis & BIT2) |
| 1244 | ri_change(info); |
| 1245 | } |
| 1246 | } |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 1247 | |
| 1248 | /* Request bottom half processing if there's something |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1249 | * for it to do and the bh is not already running |
| 1250 | */ |
| 1251 | |
| 1252 | if (info->pending_bh && !info->bh_running && !info->bh_requested) { |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 1253 | if ( debug_level >= DEBUG_LEVEL_ISR ) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1254 | printk("%s(%d):%s queueing bh task.\n", |
| 1255 | __FILE__,__LINE__,info->device_name); |
| 1256 | schedule_work(&info->task); |
Joe Perches | 0fab6de | 2008-04-28 02:14:02 -0700 | [diff] [blame] | 1257 | info->bh_requested = true; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1258 | } |
| 1259 | |
| 1260 | spin_unlock(&info->lock); |
Alan Cox | eeb4613 | 2009-01-02 13:48:47 +0000 | [diff] [blame] | 1261 | tty_kref_put(tty); |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 1262 | |
| 1263 | if (debug_level >= DEBUG_LEVEL_ISR) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1264 | printk("%s(%d):mgslpc_isr(%d)exit.\n", |
Jeff Garzik | a6f97b2 | 2007-10-31 05:20:49 -0400 | [diff] [blame] | 1265 | __FILE__, __LINE__, info->irq_level); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1266 | |
| 1267 | return IRQ_HANDLED; |
| 1268 | } |
| 1269 | |
| 1270 | /* Initialize and start device. |
| 1271 | */ |
Alan Cox | eeb4613 | 2009-01-02 13:48:47 +0000 | [diff] [blame] | 1272 | static int startup(MGSLPC_INFO * info, struct tty_struct *tty) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1273 | { |
| 1274 | int retval = 0; |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 1275 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1276 | if (debug_level >= DEBUG_LEVEL_INFO) |
| 1277 | printk("%s(%d):startup(%s)\n",__FILE__,__LINE__,info->device_name); |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 1278 | |
Alan Cox | eeb4613 | 2009-01-02 13:48:47 +0000 | [diff] [blame] | 1279 | if (info->port.flags & ASYNC_INITIALIZED) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1280 | return 0; |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 1281 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1282 | if (!info->tx_buf) { |
| 1283 | /* allocate a page of memory for a transmit buffer */ |
| 1284 | info->tx_buf = (unsigned char *)get_zeroed_page(GFP_KERNEL); |
| 1285 | if (!info->tx_buf) { |
| 1286 | printk(KERN_ERR"%s(%d):%s can't allocate transmit buffer\n", |
| 1287 | __FILE__,__LINE__,info->device_name); |
| 1288 | return -ENOMEM; |
| 1289 | } |
| 1290 | } |
| 1291 | |
| 1292 | info->pending_bh = 0; |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 1293 | |
Paul Fulghum | a7482a2 | 2005-09-10 00:26:07 -0700 | [diff] [blame] | 1294 | memset(&info->icount, 0, sizeof(info->icount)); |
| 1295 | |
Jiri Slaby | 40565f1 | 2007-02-12 00:52:31 -0800 | [diff] [blame] | 1296 | setup_timer(&info->tx_timer, tx_timeout, (unsigned long)info); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1297 | |
| 1298 | /* Allocate and claim adapter resources */ |
| 1299 | retval = claim_resources(info); |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 1300 | |
Lucas De Marchi | 25985ed | 2011-03-30 22:57:33 -0300 | [diff] [blame] | 1301 | /* perform existence check and diagnostics */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1302 | if ( !retval ) |
| 1303 | retval = adapter_test(info); |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 1304 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1305 | if ( retval ) { |
Alan Cox | eeb4613 | 2009-01-02 13:48:47 +0000 | [diff] [blame] | 1306 | if (capable(CAP_SYS_ADMIN) && tty) |
| 1307 | set_bit(TTY_IO_ERROR, &tty->flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1308 | release_resources(info); |
| 1309 | return retval; |
| 1310 | } |
| 1311 | |
| 1312 | /* program hardware for current parameters */ |
Alan Cox | eeb4613 | 2009-01-02 13:48:47 +0000 | [diff] [blame] | 1313 | mgslpc_change_params(info, tty); |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 1314 | |
Alan Cox | eeb4613 | 2009-01-02 13:48:47 +0000 | [diff] [blame] | 1315 | if (tty) |
| 1316 | clear_bit(TTY_IO_ERROR, &tty->flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1317 | |
Alan Cox | eeb4613 | 2009-01-02 13:48:47 +0000 | [diff] [blame] | 1318 | info->port.flags |= ASYNC_INITIALIZED; |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 1319 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1320 | return 0; |
| 1321 | } |
| 1322 | |
| 1323 | /* Called by mgslpc_close() and mgslpc_hangup() to shutdown hardware |
| 1324 | */ |
Alan Cox | eeb4613 | 2009-01-02 13:48:47 +0000 | [diff] [blame] | 1325 | static void shutdown(MGSLPC_INFO * info, struct tty_struct *tty) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1326 | { |
| 1327 | unsigned long flags; |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 1328 | |
Alan Cox | eeb4613 | 2009-01-02 13:48:47 +0000 | [diff] [blame] | 1329 | if (!(info->port.flags & ASYNC_INITIALIZED)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1330 | return; |
| 1331 | |
| 1332 | if (debug_level >= DEBUG_LEVEL_INFO) |
| 1333 | printk("%s(%d):mgslpc_shutdown(%s)\n", |
| 1334 | __FILE__,__LINE__, info->device_name ); |
| 1335 | |
| 1336 | /* clear status wait queue because status changes */ |
| 1337 | /* can't happen after shutting down the hardware */ |
| 1338 | wake_up_interruptible(&info->status_event_wait_q); |
| 1339 | wake_up_interruptible(&info->event_wait_q); |
| 1340 | |
Jiri Slaby | 40565f1 | 2007-02-12 00:52:31 -0800 | [diff] [blame] | 1341 | del_timer_sync(&info->tx_timer); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1342 | |
| 1343 | if (info->tx_buf) { |
| 1344 | free_page((unsigned long) info->tx_buf); |
| 1345 | info->tx_buf = NULL; |
| 1346 | } |
| 1347 | |
| 1348 | spin_lock_irqsave(&info->lock,flags); |
| 1349 | |
| 1350 | rx_stop(info); |
| 1351 | tx_stop(info); |
| 1352 | |
| 1353 | /* TODO:disable interrupts instead of reset to preserve signal states */ |
| 1354 | reset_device(info); |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 1355 | |
Alan Cox | 373f5ae | 2012-07-19 12:23:28 +0100 | [diff] [blame] | 1356 | if (!tty || tty->termios.c_cflag & HUPCL) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1357 | info->serial_signals &= ~(SerialSignal_DTR + SerialSignal_RTS); |
| 1358 | set_signals(info); |
| 1359 | } |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 1360 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1361 | spin_unlock_irqrestore(&info->lock,flags); |
| 1362 | |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 1363 | release_resources(info); |
| 1364 | |
Alan Cox | eeb4613 | 2009-01-02 13:48:47 +0000 | [diff] [blame] | 1365 | if (tty) |
| 1366 | set_bit(TTY_IO_ERROR, &tty->flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1367 | |
Alan Cox | eeb4613 | 2009-01-02 13:48:47 +0000 | [diff] [blame] | 1368 | info->port.flags &= ~ASYNC_INITIALIZED; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1369 | } |
| 1370 | |
Alan Cox | eeb4613 | 2009-01-02 13:48:47 +0000 | [diff] [blame] | 1371 | static void mgslpc_program_hw(MGSLPC_INFO *info, struct tty_struct *tty) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1372 | { |
| 1373 | unsigned long flags; |
| 1374 | |
| 1375 | spin_lock_irqsave(&info->lock,flags); |
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 | rx_stop(info); |
| 1378 | tx_stop(info); |
| 1379 | info->tx_count = info->tx_put = info->tx_get = 0; |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 1380 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1381 | if (info->params.mode == MGSL_MODE_HDLC || info->netcount) |
| 1382 | hdlc_mode(info); |
| 1383 | else |
| 1384 | async_mode(info); |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 1385 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1386 | set_signals(info); |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 1387 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1388 | info->dcd_chkcount = 0; |
| 1389 | info->cts_chkcount = 0; |
| 1390 | info->ri_chkcount = 0; |
| 1391 | info->dsr_chkcount = 0; |
| 1392 | |
| 1393 | irq_enable(info, CHB, IRQ_DCD | IRQ_CTS); |
| 1394 | port_irq_enable(info, (unsigned char) PVR_DSR | PVR_RI); |
| 1395 | get_signals(info); |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 1396 | |
Alan Cox | 373f5ae | 2012-07-19 12:23:28 +0100 | [diff] [blame] | 1397 | if (info->netcount || (tty && (tty->termios.c_cflag & CREAD))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1398 | rx_start(info); |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 1399 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1400 | spin_unlock_irqrestore(&info->lock,flags); |
| 1401 | } |
| 1402 | |
| 1403 | /* Reconfigure adapter based on new parameters |
| 1404 | */ |
Alan Cox | eeb4613 | 2009-01-02 13:48:47 +0000 | [diff] [blame] | 1405 | static void mgslpc_change_params(MGSLPC_INFO *info, struct tty_struct *tty) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1406 | { |
| 1407 | unsigned cflag; |
| 1408 | int bits_per_char; |
| 1409 | |
Alan Cox | 373f5ae | 2012-07-19 12:23:28 +0100 | [diff] [blame] | 1410 | if (!tty) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1411 | return; |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 1412 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1413 | if (debug_level >= DEBUG_LEVEL_INFO) |
| 1414 | printk("%s(%d):mgslpc_change_params(%s)\n", |
| 1415 | __FILE__,__LINE__, info->device_name ); |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 1416 | |
Alan Cox | 373f5ae | 2012-07-19 12:23:28 +0100 | [diff] [blame] | 1417 | cflag = tty->termios.c_cflag; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1418 | |
| 1419 | /* if B0 rate (hangup) specified then negate DTR and RTS */ |
| 1420 | /* otherwise assert DTR and RTS */ |
| 1421 | if (cflag & CBAUD) |
| 1422 | info->serial_signals |= SerialSignal_RTS + SerialSignal_DTR; |
| 1423 | else |
| 1424 | info->serial_signals &= ~(SerialSignal_RTS + SerialSignal_DTR); |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 1425 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1426 | /* byte size and parity */ |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 1427 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1428 | switch (cflag & CSIZE) { |
| 1429 | case CS5: info->params.data_bits = 5; break; |
| 1430 | case CS6: info->params.data_bits = 6; break; |
| 1431 | case CS7: info->params.data_bits = 7; break; |
| 1432 | case CS8: info->params.data_bits = 8; break; |
| 1433 | default: info->params.data_bits = 7; break; |
| 1434 | } |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 1435 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1436 | if (cflag & CSTOPB) |
| 1437 | info->params.stop_bits = 2; |
| 1438 | else |
| 1439 | info->params.stop_bits = 1; |
| 1440 | |
| 1441 | info->params.parity = ASYNC_PARITY_NONE; |
| 1442 | if (cflag & PARENB) { |
| 1443 | if (cflag & PARODD) |
| 1444 | info->params.parity = ASYNC_PARITY_ODD; |
| 1445 | else |
| 1446 | info->params.parity = ASYNC_PARITY_EVEN; |
| 1447 | #ifdef CMSPAR |
| 1448 | if (cflag & CMSPAR) |
| 1449 | info->params.parity = ASYNC_PARITY_SPACE; |
| 1450 | #endif |
| 1451 | } |
| 1452 | |
| 1453 | /* calculate number of jiffies to transmit a full |
| 1454 | * FIFO (32 bytes) at specified data rate |
| 1455 | */ |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 1456 | bits_per_char = info->params.data_bits + |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1457 | info->params.stop_bits + 1; |
| 1458 | |
| 1459 | /* if port data rate is set to 460800 or less then |
| 1460 | * allow tty settings to override, otherwise keep the |
| 1461 | * current data rate. |
| 1462 | */ |
| 1463 | if (info->params.data_rate <= 460800) { |
Alan Cox | eeb4613 | 2009-01-02 13:48:47 +0000 | [diff] [blame] | 1464 | info->params.data_rate = tty_get_baud_rate(tty); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1465 | } |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 1466 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1467 | if ( info->params.data_rate ) { |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 1468 | info->timeout = (32*HZ*bits_per_char) / |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1469 | info->params.data_rate; |
| 1470 | } |
| 1471 | info->timeout += HZ/50; /* Add .02 seconds of slop */ |
| 1472 | |
| 1473 | if (cflag & CRTSCTS) |
Alan Cox | eeb4613 | 2009-01-02 13:48:47 +0000 | [diff] [blame] | 1474 | info->port.flags |= ASYNC_CTS_FLOW; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1475 | else |
Alan Cox | eeb4613 | 2009-01-02 13:48:47 +0000 | [diff] [blame] | 1476 | info->port.flags &= ~ASYNC_CTS_FLOW; |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 1477 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1478 | if (cflag & CLOCAL) |
Alan Cox | eeb4613 | 2009-01-02 13:48:47 +0000 | [diff] [blame] | 1479 | info->port.flags &= ~ASYNC_CHECK_CD; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1480 | else |
Alan Cox | eeb4613 | 2009-01-02 13:48:47 +0000 | [diff] [blame] | 1481 | info->port.flags |= ASYNC_CHECK_CD; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1482 | |
| 1483 | /* process tty input control flags */ |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 1484 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1485 | info->read_status_mask = 0; |
Alan Cox | eeb4613 | 2009-01-02 13:48:47 +0000 | [diff] [blame] | 1486 | if (I_INPCK(tty)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1487 | info->read_status_mask |= BIT7 | BIT6; |
Alan Cox | eeb4613 | 2009-01-02 13:48:47 +0000 | [diff] [blame] | 1488 | if (I_IGNPAR(tty)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1489 | info->ignore_status_mask |= BIT7 | BIT6; |
| 1490 | |
Alan Cox | eeb4613 | 2009-01-02 13:48:47 +0000 | [diff] [blame] | 1491 | mgslpc_program_hw(info, tty); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1492 | } |
| 1493 | |
| 1494 | /* Add a character to the transmit buffer |
| 1495 | */ |
Alan Cox | d7e752e | 2008-04-30 00:54:04 -0700 | [diff] [blame] | 1496 | static int mgslpc_put_char(struct tty_struct *tty, unsigned char ch) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1497 | { |
| 1498 | MGSLPC_INFO *info = (MGSLPC_INFO *)tty->driver_data; |
| 1499 | unsigned long flags; |
| 1500 | |
| 1501 | if (debug_level >= DEBUG_LEVEL_INFO) { |
| 1502 | printk( "%s(%d):mgslpc_put_char(%d) on %s\n", |
| 1503 | __FILE__,__LINE__,ch,info->device_name); |
| 1504 | } |
| 1505 | |
| 1506 | if (mgslpc_paranoia_check(info, tty->name, "mgslpc_put_char")) |
Alan Cox | d7e752e | 2008-04-30 00:54:04 -0700 | [diff] [blame] | 1507 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1508 | |
Eric Sesterhenn | 326f28e9 | 2006-06-25 05:48:48 -0700 | [diff] [blame] | 1509 | if (!info->tx_buf) |
Alan Cox | d7e752e | 2008-04-30 00:54:04 -0700 | [diff] [blame] | 1510 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1511 | |
| 1512 | spin_lock_irqsave(&info->lock,flags); |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 1513 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1514 | if (info->params.mode == MGSL_MODE_ASYNC || !info->tx_active) { |
| 1515 | if (info->tx_count < TXBUFSIZE - 1) { |
| 1516 | info->tx_buf[info->tx_put++] = ch; |
| 1517 | info->tx_put &= TXBUFSIZE-1; |
| 1518 | info->tx_count++; |
| 1519 | } |
| 1520 | } |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 1521 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1522 | spin_unlock_irqrestore(&info->lock,flags); |
Alan Cox | d7e752e | 2008-04-30 00:54:04 -0700 | [diff] [blame] | 1523 | return 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1524 | } |
| 1525 | |
| 1526 | /* Enable transmitter so remaining characters in the |
| 1527 | * transmit buffer are sent. |
| 1528 | */ |
| 1529 | static void mgslpc_flush_chars(struct tty_struct *tty) |
| 1530 | { |
| 1531 | MGSLPC_INFO *info = (MGSLPC_INFO *)tty->driver_data; |
| 1532 | unsigned long flags; |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 1533 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1534 | if (debug_level >= DEBUG_LEVEL_INFO) |
| 1535 | printk( "%s(%d):mgslpc_flush_chars() entry on %s tx_count=%d\n", |
| 1536 | __FILE__,__LINE__,info->device_name,info->tx_count); |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 1537 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1538 | if (mgslpc_paranoia_check(info, tty->name, "mgslpc_flush_chars")) |
| 1539 | return; |
| 1540 | |
| 1541 | if (info->tx_count <= 0 || tty->stopped || |
| 1542 | tty->hw_stopped || !info->tx_buf) |
| 1543 | return; |
| 1544 | |
| 1545 | if (debug_level >= DEBUG_LEVEL_INFO) |
| 1546 | printk( "%s(%d):mgslpc_flush_chars() entry on %s starting transmitter\n", |
| 1547 | __FILE__,__LINE__,info->device_name); |
| 1548 | |
| 1549 | spin_lock_irqsave(&info->lock,flags); |
| 1550 | if (!info->tx_active) |
Alan Cox | eeb4613 | 2009-01-02 13:48:47 +0000 | [diff] [blame] | 1551 | tx_start(info, tty); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1552 | spin_unlock_irqrestore(&info->lock,flags); |
| 1553 | } |
| 1554 | |
| 1555 | /* Send a block of data |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 1556 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1557 | * Arguments: |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 1558 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1559 | * tty pointer to tty information structure |
| 1560 | * buf pointer to buffer containing send data |
| 1561 | * count size of send data in bytes |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 1562 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1563 | * Returns: number of characters written |
| 1564 | */ |
| 1565 | static int mgslpc_write(struct tty_struct * tty, |
| 1566 | const unsigned char *buf, int count) |
| 1567 | { |
| 1568 | int c, ret = 0; |
| 1569 | MGSLPC_INFO *info = (MGSLPC_INFO *)tty->driver_data; |
| 1570 | unsigned long flags; |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 1571 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1572 | if (debug_level >= DEBUG_LEVEL_INFO) |
| 1573 | printk( "%s(%d):mgslpc_write(%s) count=%d\n", |
| 1574 | __FILE__,__LINE__,info->device_name,count); |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 1575 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1576 | if (mgslpc_paranoia_check(info, tty->name, "mgslpc_write") || |
Eric Sesterhenn | 326f28e9 | 2006-06-25 05:48:48 -0700 | [diff] [blame] | 1577 | !info->tx_buf) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1578 | goto cleanup; |
| 1579 | |
| 1580 | if (info->params.mode == MGSL_MODE_HDLC) { |
| 1581 | if (count > TXBUFSIZE) { |
| 1582 | ret = -EIO; |
| 1583 | goto cleanup; |
| 1584 | } |
| 1585 | if (info->tx_active) |
| 1586 | goto cleanup; |
| 1587 | else if (info->tx_count) |
| 1588 | goto start; |
| 1589 | } |
| 1590 | |
| 1591 | for (;;) { |
| 1592 | c = min(count, |
| 1593 | min(TXBUFSIZE - info->tx_count - 1, |
| 1594 | TXBUFSIZE - info->tx_put)); |
| 1595 | if (c <= 0) |
| 1596 | break; |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 1597 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1598 | memcpy(info->tx_buf + info->tx_put, buf, c); |
| 1599 | |
| 1600 | spin_lock_irqsave(&info->lock,flags); |
| 1601 | info->tx_put = (info->tx_put + c) & (TXBUFSIZE-1); |
| 1602 | info->tx_count += c; |
| 1603 | spin_unlock_irqrestore(&info->lock,flags); |
| 1604 | |
| 1605 | buf += c; |
| 1606 | count -= c; |
| 1607 | ret += c; |
| 1608 | } |
| 1609 | start: |
| 1610 | if (info->tx_count && !tty->stopped && !tty->hw_stopped) { |
| 1611 | spin_lock_irqsave(&info->lock,flags); |
| 1612 | if (!info->tx_active) |
Alan Cox | eeb4613 | 2009-01-02 13:48:47 +0000 | [diff] [blame] | 1613 | tx_start(info, tty); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1614 | spin_unlock_irqrestore(&info->lock,flags); |
| 1615 | } |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 1616 | cleanup: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1617 | if (debug_level >= DEBUG_LEVEL_INFO) |
| 1618 | printk( "%s(%d):mgslpc_write(%s) returning=%d\n", |
| 1619 | __FILE__,__LINE__,info->device_name,ret); |
| 1620 | return ret; |
| 1621 | } |
| 1622 | |
| 1623 | /* Return the count of free bytes in transmit buffer |
| 1624 | */ |
| 1625 | static int mgslpc_write_room(struct tty_struct *tty) |
| 1626 | { |
| 1627 | MGSLPC_INFO *info = (MGSLPC_INFO *)tty->driver_data; |
| 1628 | int ret; |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 1629 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1630 | if (mgslpc_paranoia_check(info, tty->name, "mgslpc_write_room")) |
| 1631 | return 0; |
| 1632 | |
| 1633 | if (info->params.mode == MGSL_MODE_HDLC) { |
| 1634 | /* HDLC (frame oriented) mode */ |
| 1635 | if (info->tx_active) |
| 1636 | return 0; |
| 1637 | else |
| 1638 | return HDLC_MAX_FRAME_SIZE; |
| 1639 | } else { |
| 1640 | ret = TXBUFSIZE - info->tx_count - 1; |
| 1641 | if (ret < 0) |
| 1642 | ret = 0; |
| 1643 | } |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 1644 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1645 | if (debug_level >= DEBUG_LEVEL_INFO) |
| 1646 | printk("%s(%d):mgslpc_write_room(%s)=%d\n", |
| 1647 | __FILE__,__LINE__, info->device_name, ret); |
| 1648 | return ret; |
| 1649 | } |
| 1650 | |
| 1651 | /* Return the count of bytes in transmit buffer |
| 1652 | */ |
| 1653 | static int mgslpc_chars_in_buffer(struct tty_struct *tty) |
| 1654 | { |
| 1655 | MGSLPC_INFO *info = (MGSLPC_INFO *)tty->driver_data; |
| 1656 | int rc; |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 1657 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1658 | if (debug_level >= DEBUG_LEVEL_INFO) |
| 1659 | printk("%s(%d):mgslpc_chars_in_buffer(%s)\n", |
| 1660 | __FILE__,__LINE__, info->device_name ); |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 1661 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1662 | if (mgslpc_paranoia_check(info, tty->name, "mgslpc_chars_in_buffer")) |
| 1663 | return 0; |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 1664 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1665 | if (info->params.mode == MGSL_MODE_HDLC) |
| 1666 | rc = info->tx_active ? info->max_frame_size : 0; |
| 1667 | else |
| 1668 | rc = info->tx_count; |
| 1669 | |
| 1670 | if (debug_level >= DEBUG_LEVEL_INFO) |
| 1671 | printk("%s(%d):mgslpc_chars_in_buffer(%s)=%d\n", |
| 1672 | __FILE__,__LINE__, info->device_name, rc); |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 1673 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1674 | return rc; |
| 1675 | } |
| 1676 | |
| 1677 | /* Discard all data in the send buffer |
| 1678 | */ |
| 1679 | static void mgslpc_flush_buffer(struct tty_struct *tty) |
| 1680 | { |
| 1681 | MGSLPC_INFO *info = (MGSLPC_INFO *)tty->driver_data; |
| 1682 | unsigned long flags; |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 1683 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1684 | if (debug_level >= DEBUG_LEVEL_INFO) |
| 1685 | printk("%s(%d):mgslpc_flush_buffer(%s) entry\n", |
| 1686 | __FILE__,__LINE__, info->device_name ); |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 1687 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1688 | if (mgslpc_paranoia_check(info, tty->name, "mgslpc_flush_buffer")) |
| 1689 | return; |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 1690 | |
| 1691 | spin_lock_irqsave(&info->lock,flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1692 | info->tx_count = info->tx_put = info->tx_get = 0; |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 1693 | del_timer(&info->tx_timer); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1694 | spin_unlock_irqrestore(&info->lock,flags); |
| 1695 | |
| 1696 | wake_up_interruptible(&tty->write_wait); |
| 1697 | tty_wakeup(tty); |
| 1698 | } |
| 1699 | |
| 1700 | /* Send a high-priority XON/XOFF character |
| 1701 | */ |
| 1702 | static void mgslpc_send_xchar(struct tty_struct *tty, char ch) |
| 1703 | { |
| 1704 | MGSLPC_INFO *info = (MGSLPC_INFO *)tty->driver_data; |
| 1705 | unsigned long flags; |
| 1706 | |
| 1707 | if (debug_level >= DEBUG_LEVEL_INFO) |
| 1708 | printk("%s(%d):mgslpc_send_xchar(%s,%d)\n", |
| 1709 | __FILE__,__LINE__, info->device_name, ch ); |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 1710 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1711 | if (mgslpc_paranoia_check(info, tty->name, "mgslpc_send_xchar")) |
| 1712 | return; |
| 1713 | |
| 1714 | info->x_char = ch; |
| 1715 | if (ch) { |
| 1716 | spin_lock_irqsave(&info->lock,flags); |
| 1717 | if (!info->tx_enabled) |
Alan Cox | eeb4613 | 2009-01-02 13:48:47 +0000 | [diff] [blame] | 1718 | tx_start(info, tty); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1719 | spin_unlock_irqrestore(&info->lock,flags); |
| 1720 | } |
| 1721 | } |
| 1722 | |
| 1723 | /* Signal remote device to throttle send data (our receive data) |
| 1724 | */ |
| 1725 | static void mgslpc_throttle(struct tty_struct * tty) |
| 1726 | { |
| 1727 | MGSLPC_INFO *info = (MGSLPC_INFO *)tty->driver_data; |
| 1728 | unsigned long flags; |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 1729 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1730 | if (debug_level >= DEBUG_LEVEL_INFO) |
| 1731 | printk("%s(%d):mgslpc_throttle(%s) entry\n", |
| 1732 | __FILE__,__LINE__, info->device_name ); |
| 1733 | |
| 1734 | if (mgslpc_paranoia_check(info, tty->name, "mgslpc_throttle")) |
| 1735 | return; |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 1736 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1737 | if (I_IXOFF(tty)) |
| 1738 | mgslpc_send_xchar(tty, STOP_CHAR(tty)); |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 1739 | |
Alan Cox | 373f5ae | 2012-07-19 12:23:28 +0100 | [diff] [blame] | 1740 | if (tty->termios.c_cflag & CRTSCTS) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1741 | spin_lock_irqsave(&info->lock,flags); |
| 1742 | info->serial_signals &= ~SerialSignal_RTS; |
| 1743 | set_signals(info); |
| 1744 | spin_unlock_irqrestore(&info->lock,flags); |
| 1745 | } |
| 1746 | } |
| 1747 | |
| 1748 | /* Signal remote device to stop throttling send data (our receive data) |
| 1749 | */ |
| 1750 | static void mgslpc_unthrottle(struct tty_struct * tty) |
| 1751 | { |
| 1752 | MGSLPC_INFO *info = (MGSLPC_INFO *)tty->driver_data; |
| 1753 | unsigned long flags; |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 1754 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1755 | if (debug_level >= DEBUG_LEVEL_INFO) |
| 1756 | printk("%s(%d):mgslpc_unthrottle(%s) entry\n", |
| 1757 | __FILE__,__LINE__, info->device_name ); |
| 1758 | |
| 1759 | if (mgslpc_paranoia_check(info, tty->name, "mgslpc_unthrottle")) |
| 1760 | return; |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 1761 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1762 | if (I_IXOFF(tty)) { |
| 1763 | if (info->x_char) |
| 1764 | info->x_char = 0; |
| 1765 | else |
| 1766 | mgslpc_send_xchar(tty, START_CHAR(tty)); |
| 1767 | } |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 1768 | |
Alan Cox | 373f5ae | 2012-07-19 12:23:28 +0100 | [diff] [blame] | 1769 | if (tty->termios.c_cflag & CRTSCTS) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1770 | spin_lock_irqsave(&info->lock,flags); |
| 1771 | info->serial_signals |= SerialSignal_RTS; |
| 1772 | set_signals(info); |
| 1773 | spin_unlock_irqrestore(&info->lock,flags); |
| 1774 | } |
| 1775 | } |
| 1776 | |
| 1777 | /* get the current serial statistics |
| 1778 | */ |
| 1779 | static int get_stats(MGSLPC_INFO * info, struct mgsl_icount __user *user_icount) |
| 1780 | { |
| 1781 | int err; |
| 1782 | if (debug_level >= DEBUG_LEVEL_INFO) |
| 1783 | printk("get_params(%s)\n", info->device_name); |
Paul Fulghum | a7482a2 | 2005-09-10 00:26:07 -0700 | [diff] [blame] | 1784 | if (!user_icount) { |
| 1785 | memset(&info->icount, 0, sizeof(info->icount)); |
| 1786 | } else { |
| 1787 | COPY_TO_USER(err, user_icount, &info->icount, sizeof(struct mgsl_icount)); |
| 1788 | if (err) |
| 1789 | return -EFAULT; |
| 1790 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1791 | return 0; |
| 1792 | } |
| 1793 | |
| 1794 | /* get the current serial parameters |
| 1795 | */ |
| 1796 | static int get_params(MGSLPC_INFO * info, MGSL_PARAMS __user *user_params) |
| 1797 | { |
| 1798 | int err; |
| 1799 | if (debug_level >= DEBUG_LEVEL_INFO) |
| 1800 | printk("get_params(%s)\n", info->device_name); |
| 1801 | COPY_TO_USER(err,user_params, &info->params, sizeof(MGSL_PARAMS)); |
| 1802 | if (err) |
| 1803 | return -EFAULT; |
| 1804 | return 0; |
| 1805 | } |
| 1806 | |
| 1807 | /* set the serial parameters |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 1808 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1809 | * Arguments: |
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 | * info pointer to device instance data |
| 1812 | * new_params user buffer containing new serial params |
| 1813 | * |
| 1814 | * Returns: 0 if success, otherwise error code |
| 1815 | */ |
Alan Cox | eeb4613 | 2009-01-02 13:48:47 +0000 | [diff] [blame] | 1816 | 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] | 1817 | { |
| 1818 | unsigned long flags; |
| 1819 | MGSL_PARAMS tmp_params; |
| 1820 | int err; |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 1821 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1822 | if (debug_level >= DEBUG_LEVEL_INFO) |
| 1823 | printk("%s(%d):set_params %s\n", __FILE__,__LINE__, |
| 1824 | info->device_name ); |
| 1825 | COPY_FROM_USER(err,&tmp_params, new_params, sizeof(MGSL_PARAMS)); |
| 1826 | if (err) { |
| 1827 | if ( debug_level >= DEBUG_LEVEL_INFO ) |
| 1828 | printk( "%s(%d):set_params(%s) user buffer copy failed\n", |
| 1829 | __FILE__,__LINE__,info->device_name); |
| 1830 | return -EFAULT; |
| 1831 | } |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 1832 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1833 | spin_lock_irqsave(&info->lock,flags); |
| 1834 | memcpy(&info->params,&tmp_params,sizeof(MGSL_PARAMS)); |
| 1835 | spin_unlock_irqrestore(&info->lock,flags); |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 1836 | |
Alan Cox | eeb4613 | 2009-01-02 13:48:47 +0000 | [diff] [blame] | 1837 | mgslpc_change_params(info, tty); |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 1838 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1839 | return 0; |
| 1840 | } |
| 1841 | |
| 1842 | static int get_txidle(MGSLPC_INFO * info, int __user *idle_mode) |
| 1843 | { |
| 1844 | int err; |
| 1845 | if (debug_level >= DEBUG_LEVEL_INFO) |
| 1846 | printk("get_txidle(%s)=%d\n", info->device_name, info->idle_mode); |
| 1847 | COPY_TO_USER(err,idle_mode, &info->idle_mode, sizeof(int)); |
| 1848 | if (err) |
| 1849 | return -EFAULT; |
| 1850 | return 0; |
| 1851 | } |
| 1852 | |
| 1853 | static int set_txidle(MGSLPC_INFO * info, int idle_mode) |
| 1854 | { |
| 1855 | unsigned long flags; |
| 1856 | if (debug_level >= DEBUG_LEVEL_INFO) |
| 1857 | printk("set_txidle(%s,%d)\n", info->device_name, idle_mode); |
| 1858 | spin_lock_irqsave(&info->lock,flags); |
| 1859 | info->idle_mode = idle_mode; |
| 1860 | tx_set_idle(info); |
| 1861 | spin_unlock_irqrestore(&info->lock,flags); |
| 1862 | return 0; |
| 1863 | } |
| 1864 | |
| 1865 | static int get_interface(MGSLPC_INFO * info, int __user *if_mode) |
| 1866 | { |
| 1867 | int err; |
| 1868 | if (debug_level >= DEBUG_LEVEL_INFO) |
| 1869 | printk("get_interface(%s)=%d\n", info->device_name, info->if_mode); |
| 1870 | COPY_TO_USER(err,if_mode, &info->if_mode, sizeof(int)); |
| 1871 | if (err) |
| 1872 | return -EFAULT; |
| 1873 | return 0; |
| 1874 | } |
| 1875 | |
| 1876 | static int set_interface(MGSLPC_INFO * info, int if_mode) |
| 1877 | { |
| 1878 | unsigned long flags; |
| 1879 | unsigned char val; |
| 1880 | if (debug_level >= DEBUG_LEVEL_INFO) |
| 1881 | printk("set_interface(%s,%d)\n", info->device_name, if_mode); |
| 1882 | spin_lock_irqsave(&info->lock,flags); |
| 1883 | info->if_mode = if_mode; |
| 1884 | |
| 1885 | val = read_reg(info, PVR) & 0x0f; |
| 1886 | switch (info->if_mode) |
| 1887 | { |
| 1888 | case MGSL_INTERFACE_RS232: val |= PVR_RS232; break; |
| 1889 | case MGSL_INTERFACE_V35: val |= PVR_V35; break; |
| 1890 | case MGSL_INTERFACE_RS422: val |= PVR_RS422; break; |
| 1891 | } |
| 1892 | write_reg(info, PVR, val); |
| 1893 | |
| 1894 | spin_unlock_irqrestore(&info->lock,flags); |
| 1895 | return 0; |
| 1896 | } |
| 1897 | |
Alan Cox | eeb4613 | 2009-01-02 13:48:47 +0000 | [diff] [blame] | 1898 | 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] | 1899 | { |
| 1900 | unsigned long flags; |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 1901 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1902 | if (debug_level >= DEBUG_LEVEL_INFO) |
| 1903 | printk("set_txenable(%s,%d)\n", info->device_name, enable); |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 1904 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1905 | spin_lock_irqsave(&info->lock,flags); |
| 1906 | if (enable) { |
| 1907 | if (!info->tx_enabled) |
Alan Cox | eeb4613 | 2009-01-02 13:48:47 +0000 | [diff] [blame] | 1908 | tx_start(info, tty); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1909 | } else { |
| 1910 | if (info->tx_enabled) |
| 1911 | tx_stop(info); |
| 1912 | } |
| 1913 | spin_unlock_irqrestore(&info->lock,flags); |
| 1914 | return 0; |
| 1915 | } |
| 1916 | |
| 1917 | static int tx_abort(MGSLPC_INFO * info) |
| 1918 | { |
| 1919 | unsigned long flags; |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 1920 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1921 | if (debug_level >= DEBUG_LEVEL_INFO) |
| 1922 | printk("tx_abort(%s)\n", info->device_name); |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 1923 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1924 | spin_lock_irqsave(&info->lock,flags); |
| 1925 | if (info->tx_active && info->tx_count && |
| 1926 | info->params.mode == MGSL_MODE_HDLC) { |
| 1927 | /* clear data count so FIFO is not filled on next IRQ. |
| 1928 | * This results in underrun and abort transmission. |
| 1929 | */ |
| 1930 | info->tx_count = info->tx_put = info->tx_get = 0; |
Joe Perches | 0fab6de | 2008-04-28 02:14:02 -0700 | [diff] [blame] | 1931 | info->tx_aborting = true; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1932 | } |
| 1933 | spin_unlock_irqrestore(&info->lock,flags); |
| 1934 | return 0; |
| 1935 | } |
| 1936 | |
| 1937 | static int set_rxenable(MGSLPC_INFO * info, int enable) |
| 1938 | { |
| 1939 | unsigned long flags; |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 1940 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1941 | if (debug_level >= DEBUG_LEVEL_INFO) |
| 1942 | printk("set_rxenable(%s,%d)\n", info->device_name, enable); |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 1943 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1944 | spin_lock_irqsave(&info->lock,flags); |
| 1945 | if (enable) { |
| 1946 | if (!info->rx_enabled) |
| 1947 | rx_start(info); |
| 1948 | } else { |
| 1949 | if (info->rx_enabled) |
| 1950 | rx_stop(info); |
| 1951 | } |
| 1952 | spin_unlock_irqrestore(&info->lock,flags); |
| 1953 | return 0; |
| 1954 | } |
| 1955 | |
| 1956 | /* wait for specified event to occur |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 1957 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1958 | * Arguments: info pointer to device instance data |
| 1959 | * mask pointer to bitmask of events to wait for |
| 1960 | * Return Value: 0 if successful and bit mask updated with |
| 1961 | * of events triggerred, |
| 1962 | * otherwise error code |
| 1963 | */ |
| 1964 | static int wait_events(MGSLPC_INFO * info, int __user *mask_ptr) |
| 1965 | { |
| 1966 | unsigned long flags; |
| 1967 | int s; |
| 1968 | int rc=0; |
| 1969 | struct mgsl_icount cprev, cnow; |
| 1970 | int events; |
| 1971 | int mask; |
| 1972 | struct _input_signal_events oldsigs, newsigs; |
| 1973 | DECLARE_WAITQUEUE(wait, current); |
| 1974 | |
| 1975 | COPY_FROM_USER(rc,&mask, mask_ptr, sizeof(int)); |
| 1976 | if (rc) |
| 1977 | return -EFAULT; |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 1978 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1979 | if (debug_level >= DEBUG_LEVEL_INFO) |
| 1980 | printk("wait_events(%s,%d)\n", info->device_name, mask); |
| 1981 | |
| 1982 | spin_lock_irqsave(&info->lock,flags); |
| 1983 | |
| 1984 | /* return immediately if state matches requested events */ |
| 1985 | get_signals(info); |
| 1986 | s = info->serial_signals; |
| 1987 | events = mask & |
| 1988 | ( ((s & SerialSignal_DSR) ? MgslEvent_DsrActive:MgslEvent_DsrInactive) + |
| 1989 | ((s & SerialSignal_DCD) ? MgslEvent_DcdActive:MgslEvent_DcdInactive) + |
| 1990 | ((s & SerialSignal_CTS) ? MgslEvent_CtsActive:MgslEvent_CtsInactive) + |
| 1991 | ((s & SerialSignal_RI) ? MgslEvent_RiActive :MgslEvent_RiInactive) ); |
| 1992 | if (events) { |
| 1993 | spin_unlock_irqrestore(&info->lock,flags); |
| 1994 | goto exit; |
| 1995 | } |
| 1996 | |
| 1997 | /* save current irq counts */ |
| 1998 | cprev = info->icount; |
| 1999 | oldsigs = info->input_signal_events; |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 2000 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2001 | if ((info->params.mode == MGSL_MODE_HDLC) && |
| 2002 | (mask & MgslEvent_ExitHuntMode)) |
| 2003 | irq_enable(info, CHA, IRQ_EXITHUNT); |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 2004 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2005 | set_current_state(TASK_INTERRUPTIBLE); |
| 2006 | add_wait_queue(&info->event_wait_q, &wait); |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 2007 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2008 | spin_unlock_irqrestore(&info->lock,flags); |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 2009 | |
| 2010 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2011 | for(;;) { |
| 2012 | schedule(); |
| 2013 | if (signal_pending(current)) { |
| 2014 | rc = -ERESTARTSYS; |
| 2015 | break; |
| 2016 | } |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 2017 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2018 | /* get current irq counts */ |
| 2019 | spin_lock_irqsave(&info->lock,flags); |
| 2020 | cnow = info->icount; |
| 2021 | newsigs = info->input_signal_events; |
| 2022 | set_current_state(TASK_INTERRUPTIBLE); |
| 2023 | spin_unlock_irqrestore(&info->lock,flags); |
| 2024 | |
| 2025 | /* if no change, wait aborted for some reason */ |
| 2026 | if (newsigs.dsr_up == oldsigs.dsr_up && |
| 2027 | newsigs.dsr_down == oldsigs.dsr_down && |
| 2028 | newsigs.dcd_up == oldsigs.dcd_up && |
| 2029 | newsigs.dcd_down == oldsigs.dcd_down && |
| 2030 | newsigs.cts_up == oldsigs.cts_up && |
| 2031 | newsigs.cts_down == oldsigs.cts_down && |
| 2032 | newsigs.ri_up == oldsigs.ri_up && |
| 2033 | newsigs.ri_down == oldsigs.ri_down && |
| 2034 | cnow.exithunt == cprev.exithunt && |
| 2035 | cnow.rxidle == cprev.rxidle) { |
| 2036 | rc = -EIO; |
| 2037 | break; |
| 2038 | } |
| 2039 | |
| 2040 | events = mask & |
| 2041 | ( (newsigs.dsr_up != oldsigs.dsr_up ? MgslEvent_DsrActive:0) + |
| 2042 | (newsigs.dsr_down != oldsigs.dsr_down ? MgslEvent_DsrInactive:0) + |
| 2043 | (newsigs.dcd_up != oldsigs.dcd_up ? MgslEvent_DcdActive:0) + |
| 2044 | (newsigs.dcd_down != oldsigs.dcd_down ? MgslEvent_DcdInactive:0) + |
| 2045 | (newsigs.cts_up != oldsigs.cts_up ? MgslEvent_CtsActive:0) + |
| 2046 | (newsigs.cts_down != oldsigs.cts_down ? MgslEvent_CtsInactive:0) + |
| 2047 | (newsigs.ri_up != oldsigs.ri_up ? MgslEvent_RiActive:0) + |
| 2048 | (newsigs.ri_down != oldsigs.ri_down ? MgslEvent_RiInactive:0) + |
| 2049 | (cnow.exithunt != cprev.exithunt ? MgslEvent_ExitHuntMode:0) + |
| 2050 | (cnow.rxidle != cprev.rxidle ? MgslEvent_IdleReceived:0) ); |
| 2051 | if (events) |
| 2052 | break; |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 2053 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2054 | cprev = cnow; |
| 2055 | oldsigs = newsigs; |
| 2056 | } |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 2057 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2058 | remove_wait_queue(&info->event_wait_q, &wait); |
| 2059 | set_current_state(TASK_RUNNING); |
| 2060 | |
| 2061 | if (mask & MgslEvent_ExitHuntMode) { |
| 2062 | spin_lock_irqsave(&info->lock,flags); |
| 2063 | if (!waitqueue_active(&info->event_wait_q)) |
| 2064 | irq_disable(info, CHA, IRQ_EXITHUNT); |
| 2065 | spin_unlock_irqrestore(&info->lock,flags); |
| 2066 | } |
| 2067 | exit: |
| 2068 | if (rc == 0) |
| 2069 | PUT_USER(rc, events, mask_ptr); |
| 2070 | return rc; |
| 2071 | } |
| 2072 | |
| 2073 | static int modem_input_wait(MGSLPC_INFO *info,int arg) |
| 2074 | { |
| 2075 | unsigned long flags; |
| 2076 | int rc; |
| 2077 | struct mgsl_icount cprev, cnow; |
| 2078 | DECLARE_WAITQUEUE(wait, current); |
| 2079 | |
| 2080 | /* save current irq counts */ |
| 2081 | spin_lock_irqsave(&info->lock,flags); |
| 2082 | cprev = info->icount; |
| 2083 | add_wait_queue(&info->status_event_wait_q, &wait); |
| 2084 | set_current_state(TASK_INTERRUPTIBLE); |
| 2085 | spin_unlock_irqrestore(&info->lock,flags); |
| 2086 | |
| 2087 | for(;;) { |
| 2088 | schedule(); |
| 2089 | if (signal_pending(current)) { |
| 2090 | rc = -ERESTARTSYS; |
| 2091 | break; |
| 2092 | } |
| 2093 | |
| 2094 | /* get new irq counts */ |
| 2095 | spin_lock_irqsave(&info->lock,flags); |
| 2096 | cnow = info->icount; |
| 2097 | set_current_state(TASK_INTERRUPTIBLE); |
| 2098 | spin_unlock_irqrestore(&info->lock,flags); |
| 2099 | |
| 2100 | /* if no change, wait aborted for some reason */ |
| 2101 | if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr && |
| 2102 | cnow.dcd == cprev.dcd && cnow.cts == cprev.cts) { |
| 2103 | rc = -EIO; |
| 2104 | break; |
| 2105 | } |
| 2106 | |
| 2107 | /* check for change in caller specified modem input */ |
| 2108 | if ((arg & TIOCM_RNG && cnow.rng != cprev.rng) || |
| 2109 | (arg & TIOCM_DSR && cnow.dsr != cprev.dsr) || |
| 2110 | (arg & TIOCM_CD && cnow.dcd != cprev.dcd) || |
| 2111 | (arg & TIOCM_CTS && cnow.cts != cprev.cts)) { |
| 2112 | rc = 0; |
| 2113 | break; |
| 2114 | } |
| 2115 | |
| 2116 | cprev = cnow; |
| 2117 | } |
| 2118 | remove_wait_queue(&info->status_event_wait_q, &wait); |
| 2119 | set_current_state(TASK_RUNNING); |
| 2120 | return rc; |
| 2121 | } |
| 2122 | |
| 2123 | /* return the state of the serial control and status signals |
| 2124 | */ |
Alan Cox | 60b33c1 | 2011-02-14 16:26:14 +0000 | [diff] [blame] | 2125 | static int tiocmget(struct tty_struct *tty) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2126 | { |
| 2127 | MGSLPC_INFO *info = (MGSLPC_INFO *)tty->driver_data; |
| 2128 | unsigned int result; |
| 2129 | unsigned long flags; |
| 2130 | |
| 2131 | spin_lock_irqsave(&info->lock,flags); |
| 2132 | get_signals(info); |
| 2133 | spin_unlock_irqrestore(&info->lock,flags); |
| 2134 | |
| 2135 | result = ((info->serial_signals & SerialSignal_RTS) ? TIOCM_RTS:0) + |
| 2136 | ((info->serial_signals & SerialSignal_DTR) ? TIOCM_DTR:0) + |
| 2137 | ((info->serial_signals & SerialSignal_DCD) ? TIOCM_CAR:0) + |
| 2138 | ((info->serial_signals & SerialSignal_RI) ? TIOCM_RNG:0) + |
| 2139 | ((info->serial_signals & SerialSignal_DSR) ? TIOCM_DSR:0) + |
| 2140 | ((info->serial_signals & SerialSignal_CTS) ? TIOCM_CTS:0); |
| 2141 | |
| 2142 | if (debug_level >= DEBUG_LEVEL_INFO) |
| 2143 | printk("%s(%d):%s tiocmget() value=%08X\n", |
| 2144 | __FILE__,__LINE__, info->device_name, result ); |
| 2145 | return result; |
| 2146 | } |
| 2147 | |
| 2148 | /* set modem control signals (DTR/RTS) |
| 2149 | */ |
Alan Cox | 20b9d17 | 2011-02-14 16:26:50 +0000 | [diff] [blame] | 2150 | static int tiocmset(struct tty_struct *tty, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2151 | unsigned int set, unsigned int clear) |
| 2152 | { |
| 2153 | MGSLPC_INFO *info = (MGSLPC_INFO *)tty->driver_data; |
| 2154 | unsigned long flags; |
| 2155 | |
| 2156 | if (debug_level >= DEBUG_LEVEL_INFO) |
| 2157 | printk("%s(%d):%s tiocmset(%x,%x)\n", |
| 2158 | __FILE__,__LINE__,info->device_name, set, clear); |
| 2159 | |
| 2160 | if (set & TIOCM_RTS) |
| 2161 | info->serial_signals |= SerialSignal_RTS; |
| 2162 | if (set & TIOCM_DTR) |
| 2163 | info->serial_signals |= SerialSignal_DTR; |
| 2164 | if (clear & TIOCM_RTS) |
| 2165 | info->serial_signals &= ~SerialSignal_RTS; |
| 2166 | if (clear & TIOCM_DTR) |
| 2167 | info->serial_signals &= ~SerialSignal_DTR; |
| 2168 | |
| 2169 | spin_lock_irqsave(&info->lock,flags); |
| 2170 | set_signals(info); |
| 2171 | spin_unlock_irqrestore(&info->lock,flags); |
| 2172 | |
| 2173 | return 0; |
| 2174 | } |
| 2175 | |
| 2176 | /* Set or clear transmit break condition |
| 2177 | * |
| 2178 | * Arguments: tty pointer to tty instance data |
| 2179 | * break_state -1=set break condition, 0=clear |
| 2180 | */ |
Alan Cox | 9e98966 | 2008-07-22 11:18:03 +0100 | [diff] [blame] | 2181 | static int mgslpc_break(struct tty_struct *tty, int break_state) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2182 | { |
| 2183 | MGSLPC_INFO * info = (MGSLPC_INFO *)tty->driver_data; |
| 2184 | unsigned long flags; |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 2185 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2186 | if (debug_level >= DEBUG_LEVEL_INFO) |
| 2187 | printk("%s(%d):mgslpc_break(%s,%d)\n", |
| 2188 | __FILE__,__LINE__, info->device_name, break_state); |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 2189 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2190 | if (mgslpc_paranoia_check(info, tty->name, "mgslpc_break")) |
Alan Cox | 9e98966 | 2008-07-22 11:18:03 +0100 | [diff] [blame] | 2191 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2192 | |
| 2193 | spin_lock_irqsave(&info->lock,flags); |
| 2194 | if (break_state == -1) |
| 2195 | set_reg_bits(info, CHA+DAFO, BIT6); |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 2196 | else |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2197 | clear_reg_bits(info, CHA+DAFO, BIT6); |
| 2198 | spin_unlock_irqrestore(&info->lock,flags); |
Alan Cox | 9e98966 | 2008-07-22 11:18:03 +0100 | [diff] [blame] | 2199 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2200 | } |
| 2201 | |
Alan Cox | 0587102 | 2010-09-16 18:21:52 +0100 | [diff] [blame] | 2202 | static int mgslpc_get_icount(struct tty_struct *tty, |
| 2203 | struct serial_icounter_struct *icount) |
| 2204 | { |
| 2205 | MGSLPC_INFO * info = (MGSLPC_INFO *)tty->driver_data; |
| 2206 | struct mgsl_icount cnow; /* kernel counter temps */ |
| 2207 | unsigned long flags; |
| 2208 | |
| 2209 | spin_lock_irqsave(&info->lock,flags); |
| 2210 | cnow = info->icount; |
| 2211 | spin_unlock_irqrestore(&info->lock,flags); |
| 2212 | |
| 2213 | icount->cts = cnow.cts; |
| 2214 | icount->dsr = cnow.dsr; |
| 2215 | icount->rng = cnow.rng; |
| 2216 | icount->dcd = cnow.dcd; |
| 2217 | icount->rx = cnow.rx; |
| 2218 | icount->tx = cnow.tx; |
| 2219 | icount->frame = cnow.frame; |
| 2220 | icount->overrun = cnow.overrun; |
| 2221 | icount->parity = cnow.parity; |
| 2222 | icount->brk = cnow.brk; |
| 2223 | icount->buf_overrun = cnow.buf_overrun; |
| 2224 | |
| 2225 | return 0; |
| 2226 | } |
| 2227 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2228 | /* Service an IOCTL request |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 2229 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2230 | * Arguments: |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 2231 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2232 | * tty pointer to tty instance data |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2233 | * cmd IOCTL command code |
| 2234 | * arg command argument/context |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 2235 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2236 | * Return Value: 0 if success, otherwise error code |
| 2237 | */ |
Axel Lin | 751b384 | 2011-03-01 13:12:47 +0800 | [diff] [blame] | 2238 | static int mgslpc_ioctl(struct tty_struct *tty, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2239 | unsigned int cmd, unsigned long arg) |
| 2240 | { |
| 2241 | MGSLPC_INFO * info = (MGSLPC_INFO *)tty->driver_data; |
Alan Cox | eeb4613 | 2009-01-02 13:48:47 +0000 | [diff] [blame] | 2242 | void __user *argp = (void __user *)arg; |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 2243 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2244 | if (debug_level >= DEBUG_LEVEL_INFO) |
| 2245 | printk("%s(%d):mgslpc_ioctl %s cmd=%08X\n", __FILE__,__LINE__, |
| 2246 | info->device_name, cmd ); |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 2247 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2248 | if (mgslpc_paranoia_check(info, tty->name, "mgslpc_ioctl")) |
| 2249 | return -ENODEV; |
| 2250 | |
| 2251 | if ((cmd != TIOCGSERIAL) && (cmd != TIOCSSERIAL) && |
Alan Cox | 0587102 | 2010-09-16 18:21:52 +0100 | [diff] [blame] | 2252 | (cmd != TIOCMIWAIT)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2253 | if (tty->flags & (1 << TTY_IO_ERROR)) |
| 2254 | return -EIO; |
| 2255 | } |
| 2256 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2257 | switch (cmd) { |
| 2258 | case MGSL_IOCGPARAMS: |
| 2259 | return get_params(info, argp); |
| 2260 | case MGSL_IOCSPARAMS: |
Alan Cox | eeb4613 | 2009-01-02 13:48:47 +0000 | [diff] [blame] | 2261 | return set_params(info, argp, tty); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2262 | case MGSL_IOCGTXIDLE: |
| 2263 | return get_txidle(info, argp); |
| 2264 | case MGSL_IOCSTXIDLE: |
| 2265 | return set_txidle(info, (int)arg); |
| 2266 | case MGSL_IOCGIF: |
| 2267 | return get_interface(info, argp); |
| 2268 | case MGSL_IOCSIF: |
| 2269 | return set_interface(info,(int)arg); |
| 2270 | case MGSL_IOCTXENABLE: |
Alan Cox | eeb4613 | 2009-01-02 13:48:47 +0000 | [diff] [blame] | 2271 | return set_txenable(info,(int)arg, tty); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2272 | case MGSL_IOCRXENABLE: |
| 2273 | return set_rxenable(info,(int)arg); |
| 2274 | case MGSL_IOCTXABORT: |
| 2275 | return tx_abort(info); |
| 2276 | case MGSL_IOCGSTATS: |
| 2277 | return get_stats(info, argp); |
| 2278 | case MGSL_IOCWAITEVENT: |
| 2279 | return wait_events(info, argp); |
| 2280 | case TIOCMIWAIT: |
| 2281 | return modem_input_wait(info,(int)arg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2282 | default: |
| 2283 | return -ENOIOCTLCMD; |
| 2284 | } |
| 2285 | return 0; |
| 2286 | } |
| 2287 | |
| 2288 | /* Set new termios settings |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 2289 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2290 | * Arguments: |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 2291 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2292 | * tty pointer to tty structure |
| 2293 | * termios pointer to buffer to hold returned old termios |
| 2294 | */ |
Alan Cox | 606d099 | 2006-12-08 02:38:45 -0800 | [diff] [blame] | 2295 | 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] | 2296 | { |
| 2297 | MGSLPC_INFO *info = (MGSLPC_INFO *)tty->driver_data; |
| 2298 | unsigned long flags; |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 2299 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2300 | if (debug_level >= DEBUG_LEVEL_INFO) |
| 2301 | printk("%s(%d):mgslpc_set_termios %s\n", __FILE__,__LINE__, |
| 2302 | tty->driver->name ); |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 2303 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2304 | /* just return if nothing has changed */ |
Alan Cox | 373f5ae | 2012-07-19 12:23:28 +0100 | [diff] [blame] | 2305 | if ((tty->termios.c_cflag == old_termios->c_cflag) |
| 2306 | && (RELEVANT_IFLAG(tty->termios.c_iflag) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2307 | == RELEVANT_IFLAG(old_termios->c_iflag))) |
| 2308 | return; |
| 2309 | |
Alan Cox | eeb4613 | 2009-01-02 13:48:47 +0000 | [diff] [blame] | 2310 | mgslpc_change_params(info, tty); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2311 | |
| 2312 | /* Handle transition to B0 status */ |
| 2313 | if (old_termios->c_cflag & CBAUD && |
Alan Cox | 373f5ae | 2012-07-19 12:23:28 +0100 | [diff] [blame] | 2314 | !(tty->termios.c_cflag & CBAUD)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2315 | info->serial_signals &= ~(SerialSignal_RTS + SerialSignal_DTR); |
| 2316 | spin_lock_irqsave(&info->lock,flags); |
| 2317 | set_signals(info); |
| 2318 | spin_unlock_irqrestore(&info->lock,flags); |
| 2319 | } |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 2320 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2321 | /* Handle transition away from B0 status */ |
| 2322 | if (!(old_termios->c_cflag & CBAUD) && |
Alan Cox | 373f5ae | 2012-07-19 12:23:28 +0100 | [diff] [blame] | 2323 | tty->termios.c_cflag & CBAUD) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2324 | info->serial_signals |= SerialSignal_DTR; |
Alan Cox | 373f5ae | 2012-07-19 12:23:28 +0100 | [diff] [blame] | 2325 | if (!(tty->termios.c_cflag & CRTSCTS) || |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2326 | !test_bit(TTY_THROTTLED, &tty->flags)) { |
| 2327 | info->serial_signals |= SerialSignal_RTS; |
| 2328 | } |
| 2329 | spin_lock_irqsave(&info->lock,flags); |
| 2330 | set_signals(info); |
| 2331 | spin_unlock_irqrestore(&info->lock,flags); |
| 2332 | } |
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 | /* Handle turning off CRTSCTS */ |
| 2335 | if (old_termios->c_cflag & CRTSCTS && |
Alan Cox | 373f5ae | 2012-07-19 12:23:28 +0100 | [diff] [blame] | 2336 | !(tty->termios.c_cflag & CRTSCTS)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2337 | tty->hw_stopped = 0; |
| 2338 | tx_release(tty); |
| 2339 | } |
| 2340 | } |
| 2341 | |
| 2342 | static void mgslpc_close(struct tty_struct *tty, struct file * filp) |
| 2343 | { |
| 2344 | MGSLPC_INFO * info = (MGSLPC_INFO *)tty->driver_data; |
Alan Cox | eeb4613 | 2009-01-02 13:48:47 +0000 | [diff] [blame] | 2345 | struct tty_port *port = &info->port; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2346 | |
| 2347 | if (mgslpc_paranoia_check(info, tty->name, "mgslpc_close")) |
| 2348 | return; |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 2349 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2350 | if (debug_level >= DEBUG_LEVEL_INFO) |
| 2351 | printk("%s(%d):mgslpc_close(%s) entry, count=%d\n", |
Alan Cox | eeb4613 | 2009-01-02 13:48:47 +0000 | [diff] [blame] | 2352 | __FILE__,__LINE__, info->device_name, port->count); |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 2353 | |
Alan Cox | eeb4613 | 2009-01-02 13:48:47 +0000 | [diff] [blame] | 2354 | WARN_ON(!port->count); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2355 | |
Alan Cox | eeb4613 | 2009-01-02 13:48:47 +0000 | [diff] [blame] | 2356 | if (tty_port_close_start(port, tty, filp) == 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2357 | goto cleanup; |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 2358 | |
Alan Cox | eeb4613 | 2009-01-02 13:48:47 +0000 | [diff] [blame] | 2359 | if (port->flags & ASYNC_INITIALIZED) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2360 | mgslpc_wait_until_sent(tty, info->timeout); |
| 2361 | |
Alan Cox | 978e595 | 2008-04-30 00:53:59 -0700 | [diff] [blame] | 2362 | mgslpc_flush_buffer(tty); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2363 | |
Alan Cox | 978e595 | 2008-04-30 00:53:59 -0700 | [diff] [blame] | 2364 | tty_ldisc_flush(tty); |
Alan Cox | eeb4613 | 2009-01-02 13:48:47 +0000 | [diff] [blame] | 2365 | shutdown(info, tty); |
| 2366 | |
| 2367 | tty_port_close_end(port, tty); |
| 2368 | tty_port_tty_set(port, NULL); |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 2369 | cleanup: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2370 | if (debug_level >= DEBUG_LEVEL_INFO) |
| 2371 | printk("%s(%d):mgslpc_close(%s) exit, count=%d\n", __FILE__,__LINE__, |
Alan Cox | eeb4613 | 2009-01-02 13:48:47 +0000 | [diff] [blame] | 2372 | tty->driver->name, port->count); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2373 | } |
| 2374 | |
| 2375 | /* Wait until the transmitter is empty. |
| 2376 | */ |
| 2377 | static void mgslpc_wait_until_sent(struct tty_struct *tty, int timeout) |
| 2378 | { |
| 2379 | MGSLPC_INFO * info = (MGSLPC_INFO *)tty->driver_data; |
| 2380 | unsigned long orig_jiffies, char_time; |
| 2381 | |
| 2382 | if (!info ) |
| 2383 | return; |
| 2384 | |
| 2385 | if (debug_level >= DEBUG_LEVEL_INFO) |
| 2386 | printk("%s(%d):mgslpc_wait_until_sent(%s) entry\n", |
| 2387 | __FILE__,__LINE__, info->device_name ); |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 2388 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2389 | if (mgslpc_paranoia_check(info, tty->name, "mgslpc_wait_until_sent")) |
| 2390 | return; |
| 2391 | |
Alan Cox | eeb4613 | 2009-01-02 13:48:47 +0000 | [diff] [blame] | 2392 | if (!(info->port.flags & ASYNC_INITIALIZED)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2393 | goto exit; |
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 | orig_jiffies = jiffies; |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 2396 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2397 | /* Set check interval to 1/5 of estimated time to |
| 2398 | * send a character, and make it at least 1. The check |
| 2399 | * interval should also be less than the timeout. |
| 2400 | * Note: use tight timings here to satisfy the NIST-PCTS. |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 2401 | */ |
| 2402 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2403 | if ( info->params.data_rate ) { |
| 2404 | char_time = info->timeout/(32 * 5); |
| 2405 | if (!char_time) |
| 2406 | char_time++; |
| 2407 | } else |
| 2408 | char_time = 1; |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 2409 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2410 | if (timeout) |
| 2411 | char_time = min_t(unsigned long, char_time, timeout); |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 2412 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2413 | if (info->params.mode == MGSL_MODE_HDLC) { |
| 2414 | while (info->tx_active) { |
| 2415 | msleep_interruptible(jiffies_to_msecs(char_time)); |
| 2416 | if (signal_pending(current)) |
| 2417 | break; |
| 2418 | if (timeout && time_after(jiffies, orig_jiffies + timeout)) |
| 2419 | break; |
| 2420 | } |
| 2421 | } else { |
| 2422 | while ((info->tx_count || info->tx_active) && |
| 2423 | info->tx_enabled) { |
| 2424 | msleep_interruptible(jiffies_to_msecs(char_time)); |
| 2425 | if (signal_pending(current)) |
| 2426 | break; |
| 2427 | if (timeout && time_after(jiffies, orig_jiffies + timeout)) |
| 2428 | break; |
| 2429 | } |
| 2430 | } |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 2431 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2432 | exit: |
| 2433 | if (debug_level >= DEBUG_LEVEL_INFO) |
| 2434 | printk("%s(%d):mgslpc_wait_until_sent(%s) exit\n", |
| 2435 | __FILE__,__LINE__, info->device_name ); |
| 2436 | } |
| 2437 | |
| 2438 | /* Called by tty_hangup() when a hangup is signaled. |
| 2439 | * This is the same as closing all open files for the port. |
| 2440 | */ |
| 2441 | static void mgslpc_hangup(struct tty_struct *tty) |
| 2442 | { |
| 2443 | MGSLPC_INFO * info = (MGSLPC_INFO *)tty->driver_data; |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 2444 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2445 | if (debug_level >= DEBUG_LEVEL_INFO) |
| 2446 | printk("%s(%d):mgslpc_hangup(%s)\n", |
| 2447 | __FILE__,__LINE__, info->device_name ); |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 2448 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2449 | if (mgslpc_paranoia_check(info, tty->name, "mgslpc_hangup")) |
| 2450 | return; |
| 2451 | |
| 2452 | mgslpc_flush_buffer(tty); |
Alan Cox | eeb4613 | 2009-01-02 13:48:47 +0000 | [diff] [blame] | 2453 | shutdown(info, tty); |
| 2454 | tty_port_hangup(&info->port); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2455 | } |
| 2456 | |
Alan Cox | eeb4613 | 2009-01-02 13:48:47 +0000 | [diff] [blame] | 2457 | static int carrier_raised(struct tty_port *port) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2458 | { |
Alan Cox | eeb4613 | 2009-01-02 13:48:47 +0000 | [diff] [blame] | 2459 | MGSLPC_INFO *info = container_of(port, MGSLPC_INFO, port); |
| 2460 | unsigned long flags; |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 2461 | |
Alan Cox | eeb4613 | 2009-01-02 13:48:47 +0000 | [diff] [blame] | 2462 | spin_lock_irqsave(&info->lock,flags); |
| 2463 | get_signals(info); |
| 2464 | spin_unlock_irqrestore(&info->lock,flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2465 | |
Alan Cox | eeb4613 | 2009-01-02 13:48:47 +0000 | [diff] [blame] | 2466 | if (info->serial_signals & SerialSignal_DCD) |
| 2467 | return 1; |
| 2468 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2469 | } |
| 2470 | |
Alan Cox | fcc8ac1 | 2009-06-11 12:24:17 +0100 | [diff] [blame] | 2471 | static void dtr_rts(struct tty_port *port, int onoff) |
Alan Cox | eeb4613 | 2009-01-02 13:48:47 +0000 | [diff] [blame] | 2472 | { |
| 2473 | MGSLPC_INFO *info = container_of(port, MGSLPC_INFO, port); |
| 2474 | unsigned long flags; |
| 2475 | |
| 2476 | spin_lock_irqsave(&info->lock,flags); |
Alan Cox | fcc8ac1 | 2009-06-11 12:24:17 +0100 | [diff] [blame] | 2477 | if (onoff) |
| 2478 | info->serial_signals |= SerialSignal_RTS + SerialSignal_DTR; |
| 2479 | else |
| 2480 | info->serial_signals &= ~SerialSignal_RTS + SerialSignal_DTR; |
Alan Cox | eeb4613 | 2009-01-02 13:48:47 +0000 | [diff] [blame] | 2481 | set_signals(info); |
| 2482 | spin_unlock_irqrestore(&info->lock,flags); |
| 2483 | } |
| 2484 | |
| 2485 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2486 | static int mgslpc_open(struct tty_struct *tty, struct file * filp) |
| 2487 | { |
| 2488 | MGSLPC_INFO *info; |
Alan Cox | eeb4613 | 2009-01-02 13:48:47 +0000 | [diff] [blame] | 2489 | struct tty_port *port; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2490 | int retval, line; |
| 2491 | unsigned long flags; |
| 2492 | |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 2493 | /* verify range of specified line number */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2494 | line = tty->index; |
Jiri Slaby | 410235f | 2012-03-05 14:52:01 +0100 | [diff] [blame] | 2495 | if (line >= mgslpc_device_count) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2496 | printk("%s(%d):mgslpc_open with invalid line #%d.\n", |
| 2497 | __FILE__,__LINE__,line); |
| 2498 | return -ENODEV; |
| 2499 | } |
| 2500 | |
| 2501 | /* find the info structure for the specified line */ |
| 2502 | info = mgslpc_device_list; |
| 2503 | while(info && info->line != line) |
| 2504 | info = info->next_device; |
| 2505 | if (mgslpc_paranoia_check(info, tty->name, "mgslpc_open")) |
| 2506 | return -ENODEV; |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 2507 | |
Alan Cox | eeb4613 | 2009-01-02 13:48:47 +0000 | [diff] [blame] | 2508 | port = &info->port; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2509 | tty->driver_data = info; |
Alan Cox | eeb4613 | 2009-01-02 13:48:47 +0000 | [diff] [blame] | 2510 | tty_port_tty_set(port, tty); |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 2511 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2512 | if (debug_level >= DEBUG_LEVEL_INFO) |
| 2513 | printk("%s(%d):mgslpc_open(%s), old ref count = %d\n", |
Alan Cox | eeb4613 | 2009-01-02 13:48:47 +0000 | [diff] [blame] | 2514 | __FILE__,__LINE__,tty->driver->name, port->count); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2515 | |
| 2516 | /* If port is closing, signal caller to try again */ |
Alan Cox | eeb4613 | 2009-01-02 13:48:47 +0000 | [diff] [blame] | 2517 | if (tty_hung_up_p(filp) || port->flags & ASYNC_CLOSING){ |
| 2518 | if (port->flags & ASYNC_CLOSING) |
| 2519 | interruptible_sleep_on(&port->close_wait); |
| 2520 | retval = ((port->flags & ASYNC_HUP_NOTIFY) ? |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2521 | -EAGAIN : -ERESTARTSYS); |
| 2522 | goto cleanup; |
| 2523 | } |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 2524 | |
Alan Cox | eeb4613 | 2009-01-02 13:48:47 +0000 | [diff] [blame] | 2525 | tty->low_latency = (port->flags & ASYNC_LOW_LATENCY) ? 1 : 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2526 | |
| 2527 | spin_lock_irqsave(&info->netlock, flags); |
| 2528 | if (info->netcount) { |
| 2529 | retval = -EBUSY; |
| 2530 | spin_unlock_irqrestore(&info->netlock, flags); |
| 2531 | goto cleanup; |
| 2532 | } |
Alan Cox | eeb4613 | 2009-01-02 13:48:47 +0000 | [diff] [blame] | 2533 | spin_lock(&port->lock); |
| 2534 | port->count++; |
| 2535 | spin_unlock(&port->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2536 | spin_unlock_irqrestore(&info->netlock, flags); |
| 2537 | |
Alan Cox | eeb4613 | 2009-01-02 13:48:47 +0000 | [diff] [blame] | 2538 | if (port->count == 1) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2539 | /* 1st open on this device, init hardware */ |
Alan Cox | eeb4613 | 2009-01-02 13:48:47 +0000 | [diff] [blame] | 2540 | retval = startup(info, tty); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2541 | if (retval < 0) |
| 2542 | goto cleanup; |
| 2543 | } |
| 2544 | |
Alan Cox | eeb4613 | 2009-01-02 13:48:47 +0000 | [diff] [blame] | 2545 | retval = tty_port_block_til_ready(&info->port, tty, filp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2546 | if (retval) { |
| 2547 | if (debug_level >= DEBUG_LEVEL_INFO) |
| 2548 | printk("%s(%d):block_til_ready(%s) returned %d\n", |
| 2549 | __FILE__,__LINE__, info->device_name, retval); |
| 2550 | goto cleanup; |
| 2551 | } |
| 2552 | |
| 2553 | if (debug_level >= DEBUG_LEVEL_INFO) |
| 2554 | printk("%s(%d):mgslpc_open(%s) success\n", |
| 2555 | __FILE__,__LINE__, info->device_name); |
| 2556 | retval = 0; |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 2557 | |
| 2558 | cleanup: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2559 | return retval; |
| 2560 | } |
| 2561 | |
| 2562 | /* |
| 2563 | * /proc fs routines.... |
| 2564 | */ |
| 2565 | |
Alexey Dobriyan | 8768714 | 2009-03-31 15:19:17 -0700 | [diff] [blame] | 2566 | static inline void line_info(struct seq_file *m, MGSLPC_INFO *info) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2567 | { |
| 2568 | char stat_buf[30]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2569 | unsigned long flags; |
| 2570 | |
Alexey Dobriyan | 8768714 | 2009-03-31 15:19:17 -0700 | [diff] [blame] | 2571 | seq_printf(m, "%s:io:%04X irq:%d", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2572 | info->device_name, info->io_base, info->irq_level); |
| 2573 | |
| 2574 | /* output current serial signal states */ |
| 2575 | spin_lock_irqsave(&info->lock,flags); |
| 2576 | get_signals(info); |
| 2577 | spin_unlock_irqrestore(&info->lock,flags); |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 2578 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2579 | stat_buf[0] = 0; |
| 2580 | stat_buf[1] = 0; |
| 2581 | if (info->serial_signals & SerialSignal_RTS) |
| 2582 | strcat(stat_buf, "|RTS"); |
| 2583 | if (info->serial_signals & SerialSignal_CTS) |
| 2584 | strcat(stat_buf, "|CTS"); |
| 2585 | if (info->serial_signals & SerialSignal_DTR) |
| 2586 | strcat(stat_buf, "|DTR"); |
| 2587 | if (info->serial_signals & SerialSignal_DSR) |
| 2588 | strcat(stat_buf, "|DSR"); |
| 2589 | if (info->serial_signals & SerialSignal_DCD) |
| 2590 | strcat(stat_buf, "|CD"); |
| 2591 | if (info->serial_signals & SerialSignal_RI) |
| 2592 | strcat(stat_buf, "|RI"); |
| 2593 | |
| 2594 | if (info->params.mode == MGSL_MODE_HDLC) { |
Alexey Dobriyan | 8768714 | 2009-03-31 15:19:17 -0700 | [diff] [blame] | 2595 | seq_printf(m, " HDLC txok:%d rxok:%d", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2596 | info->icount.txok, info->icount.rxok); |
| 2597 | if (info->icount.txunder) |
Alexey Dobriyan | 8768714 | 2009-03-31 15:19:17 -0700 | [diff] [blame] | 2598 | seq_printf(m, " txunder:%d", info->icount.txunder); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2599 | if (info->icount.txabort) |
Alexey Dobriyan | 8768714 | 2009-03-31 15:19:17 -0700 | [diff] [blame] | 2600 | seq_printf(m, " txabort:%d", info->icount.txabort); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2601 | if (info->icount.rxshort) |
Alexey Dobriyan | 8768714 | 2009-03-31 15:19:17 -0700 | [diff] [blame] | 2602 | seq_printf(m, " rxshort:%d", info->icount.rxshort); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2603 | if (info->icount.rxlong) |
Alexey Dobriyan | 8768714 | 2009-03-31 15:19:17 -0700 | [diff] [blame] | 2604 | seq_printf(m, " rxlong:%d", info->icount.rxlong); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2605 | if (info->icount.rxover) |
Alexey Dobriyan | 8768714 | 2009-03-31 15:19:17 -0700 | [diff] [blame] | 2606 | seq_printf(m, " rxover:%d", info->icount.rxover); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2607 | if (info->icount.rxcrc) |
Alexey Dobriyan | 8768714 | 2009-03-31 15:19:17 -0700 | [diff] [blame] | 2608 | seq_printf(m, " rxcrc:%d", info->icount.rxcrc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2609 | } else { |
Alexey Dobriyan | 8768714 | 2009-03-31 15:19:17 -0700 | [diff] [blame] | 2610 | seq_printf(m, " ASYNC tx:%d rx:%d", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2611 | info->icount.tx, info->icount.rx); |
| 2612 | if (info->icount.frame) |
Alexey Dobriyan | 8768714 | 2009-03-31 15:19:17 -0700 | [diff] [blame] | 2613 | seq_printf(m, " fe:%d", info->icount.frame); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2614 | if (info->icount.parity) |
Alexey Dobriyan | 8768714 | 2009-03-31 15:19:17 -0700 | [diff] [blame] | 2615 | seq_printf(m, " pe:%d", info->icount.parity); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2616 | if (info->icount.brk) |
Alexey Dobriyan | 8768714 | 2009-03-31 15:19:17 -0700 | [diff] [blame] | 2617 | seq_printf(m, " brk:%d", info->icount.brk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2618 | if (info->icount.overrun) |
Alexey Dobriyan | 8768714 | 2009-03-31 15:19:17 -0700 | [diff] [blame] | 2619 | seq_printf(m, " oe:%d", info->icount.overrun); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2620 | } |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 2621 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2622 | /* Append serial signal status to end */ |
Alexey Dobriyan | 8768714 | 2009-03-31 15:19:17 -0700 | [diff] [blame] | 2623 | seq_printf(m, " %s\n", stat_buf+1); |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 2624 | |
Alexey Dobriyan | 8768714 | 2009-03-31 15:19:17 -0700 | [diff] [blame] | 2625 | 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] | 2626 | info->tx_active,info->bh_requested,info->bh_running, |
| 2627 | info->pending_bh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2628 | } |
| 2629 | |
| 2630 | /* Called to print information about devices |
| 2631 | */ |
Alexey Dobriyan | 8768714 | 2009-03-31 15:19:17 -0700 | [diff] [blame] | 2632 | static int mgslpc_proc_show(struct seq_file *m, void *v) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2633 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2634 | MGSLPC_INFO *info; |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 2635 | |
Alexey Dobriyan | 8768714 | 2009-03-31 15:19:17 -0700 | [diff] [blame] | 2636 | seq_printf(m, "synclink driver:%s\n", driver_version); |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 2637 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2638 | info = mgslpc_device_list; |
| 2639 | while( info ) { |
Alexey Dobriyan | 8768714 | 2009-03-31 15:19:17 -0700 | [diff] [blame] | 2640 | line_info(m, info); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2641 | info = info->next_device; |
| 2642 | } |
Alexey Dobriyan | 8768714 | 2009-03-31 15:19:17 -0700 | [diff] [blame] | 2643 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2644 | } |
| 2645 | |
Alexey Dobriyan | 8768714 | 2009-03-31 15:19:17 -0700 | [diff] [blame] | 2646 | static int mgslpc_proc_open(struct inode *inode, struct file *file) |
| 2647 | { |
| 2648 | return single_open(file, mgslpc_proc_show, NULL); |
| 2649 | } |
| 2650 | |
| 2651 | static const struct file_operations mgslpc_proc_fops = { |
| 2652 | .owner = THIS_MODULE, |
| 2653 | .open = mgslpc_proc_open, |
| 2654 | .read = seq_read, |
| 2655 | .llseek = seq_lseek, |
| 2656 | .release = single_release, |
| 2657 | }; |
| 2658 | |
Peter Hagervall | cdaad34 | 2006-06-23 02:06:04 -0700 | [diff] [blame] | 2659 | static int rx_alloc_buffers(MGSLPC_INFO *info) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2660 | { |
| 2661 | /* each buffer has header and data */ |
| 2662 | info->rx_buf_size = sizeof(RXBUF) + info->max_frame_size; |
| 2663 | |
| 2664 | /* calculate total allocation size for 8 buffers */ |
| 2665 | info->rx_buf_total_size = info->rx_buf_size * 8; |
| 2666 | |
| 2667 | /* limit total allocated memory */ |
| 2668 | if (info->rx_buf_total_size > 0x10000) |
| 2669 | info->rx_buf_total_size = 0x10000; |
| 2670 | |
| 2671 | /* calculate number of buffers */ |
| 2672 | info->rx_buf_count = info->rx_buf_total_size / info->rx_buf_size; |
| 2673 | |
| 2674 | info->rx_buf = kmalloc(info->rx_buf_total_size, GFP_KERNEL); |
| 2675 | if (info->rx_buf == NULL) |
| 2676 | return -ENOMEM; |
| 2677 | |
Paul Fulghum | a6b68a6 | 2012-12-03 11:13:24 -0600 | [diff] [blame] | 2678 | /* unused flag buffer to satisfy receive_buf calling interface */ |
| 2679 | info->flag_buf = kzalloc(info->max_frame_size, GFP_KERNEL); |
| 2680 | if (!info->flag_buf) { |
| 2681 | kfree(info->rx_buf); |
| 2682 | info->rx_buf = NULL; |
| 2683 | return -ENOMEM; |
| 2684 | } |
| 2685 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2686 | rx_reset_buffers(info); |
| 2687 | return 0; |
| 2688 | } |
| 2689 | |
Peter Hagervall | cdaad34 | 2006-06-23 02:06:04 -0700 | [diff] [blame] | 2690 | static void rx_free_buffers(MGSLPC_INFO *info) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2691 | { |
Jesper Juhl | 735d566 | 2005-11-07 01:01:29 -0800 | [diff] [blame] | 2692 | kfree(info->rx_buf); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2693 | info->rx_buf = NULL; |
Paul Fulghum | a6b68a6 | 2012-12-03 11:13:24 -0600 | [diff] [blame] | 2694 | kfree(info->flag_buf); |
| 2695 | info->flag_buf = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2696 | } |
| 2697 | |
Peter Hagervall | cdaad34 | 2006-06-23 02:06:04 -0700 | [diff] [blame] | 2698 | static int claim_resources(MGSLPC_INFO *info) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2699 | { |
| 2700 | if (rx_alloc_buffers(info) < 0 ) { |
Lucas De Marchi | 25985ed | 2011-03-30 22:57:33 -0300 | [diff] [blame] | 2701 | printk( "Can't allocate rx buffer %s\n", info->device_name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2702 | release_resources(info); |
| 2703 | return -ENODEV; |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 2704 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2705 | return 0; |
| 2706 | } |
| 2707 | |
Peter Hagervall | cdaad34 | 2006-06-23 02:06:04 -0700 | [diff] [blame] | 2708 | static void release_resources(MGSLPC_INFO *info) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2709 | { |
| 2710 | if (debug_level >= DEBUG_LEVEL_INFO) |
| 2711 | printk("release_resources(%s)\n", info->device_name); |
| 2712 | rx_free_buffers(info); |
| 2713 | } |
| 2714 | |
| 2715 | /* Add the specified device instance data structure to the |
| 2716 | * global linked list of devices and increment the device count. |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 2717 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2718 | * Arguments: info pointer to device instance data |
| 2719 | */ |
Peter Hagervall | cdaad34 | 2006-06-23 02:06:04 -0700 | [diff] [blame] | 2720 | static void mgslpc_add_device(MGSLPC_INFO *info) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2721 | { |
| 2722 | info->next_device = NULL; |
| 2723 | info->line = mgslpc_device_count; |
| 2724 | sprintf(info->device_name,"ttySLP%d",info->line); |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 2725 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2726 | if (info->line < MAX_DEVICE_COUNT) { |
| 2727 | if (maxframe[info->line]) |
| 2728 | info->max_frame_size = maxframe[info->line]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2729 | } |
| 2730 | |
| 2731 | mgslpc_device_count++; |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 2732 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2733 | if (!mgslpc_device_list) |
| 2734 | mgslpc_device_list = info; |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 2735 | else { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2736 | MGSLPC_INFO *current_dev = mgslpc_device_list; |
| 2737 | while( current_dev->next_device ) |
| 2738 | current_dev = current_dev->next_device; |
| 2739 | current_dev->next_device = info; |
| 2740 | } |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 2741 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2742 | if (info->max_frame_size < 4096) |
| 2743 | info->max_frame_size = 4096; |
| 2744 | else if (info->max_frame_size > 65535) |
| 2745 | info->max_frame_size = 65535; |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 2746 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2747 | printk( "SyncLink PC Card %s:IO=%04X IRQ=%d\n", |
| 2748 | info->device_name, info->io_base, info->irq_level); |
| 2749 | |
Paul Fulghum | af69c7f | 2006-12-06 20:40:24 -0800 | [diff] [blame] | 2750 | #if SYNCLINK_GENERIC_HDLC |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2751 | hdlcdev_init(info); |
| 2752 | #endif |
Jiri Slaby | 16a1065 | 2012-08-07 21:47:53 +0200 | [diff] [blame] | 2753 | tty_port_register_device(&info->port, serial_driver, info->line, |
Jiri Slaby | a33ba82 | 2012-08-14 10:23:08 +0200 | [diff] [blame] | 2754 | &info->p_dev->dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2755 | } |
| 2756 | |
Peter Hagervall | cdaad34 | 2006-06-23 02:06:04 -0700 | [diff] [blame] | 2757 | static void mgslpc_remove_device(MGSLPC_INFO *remove_info) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2758 | { |
| 2759 | MGSLPC_INFO *info = mgslpc_device_list; |
| 2760 | MGSLPC_INFO *last = NULL; |
| 2761 | |
| 2762 | while(info) { |
| 2763 | if (info == remove_info) { |
| 2764 | if (last) |
| 2765 | last->next_device = info->next_device; |
| 2766 | else |
| 2767 | mgslpc_device_list = info->next_device; |
Jiri Slaby | 16a1065 | 2012-08-07 21:47:53 +0200 | [diff] [blame] | 2768 | tty_unregister_device(serial_driver, info->line); |
Paul Fulghum | af69c7f | 2006-12-06 20:40:24 -0800 | [diff] [blame] | 2769 | #if SYNCLINK_GENERIC_HDLC |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2770 | hdlcdev_exit(info); |
| 2771 | #endif |
| 2772 | release_resources(info); |
Jiri Slaby | 191c5f1 | 2012-11-15 09:49:56 +0100 | [diff] [blame] | 2773 | tty_port_destroy(&info->port); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2774 | kfree(info); |
| 2775 | mgslpc_device_count--; |
| 2776 | return; |
| 2777 | } |
| 2778 | last = info; |
| 2779 | info = info->next_device; |
| 2780 | } |
| 2781 | } |
| 2782 | |
Joe Perches | 25f8f54 | 2011-05-03 19:29:01 -0700 | [diff] [blame] | 2783 | static const struct pcmcia_device_id mgslpc_ids[] = { |
Dominik Brodowski | 4af48c8 | 2005-06-27 16:28:42 -0700 | [diff] [blame] | 2784 | PCMCIA_DEVICE_MANF_CARD(0x02c5, 0x0050), |
| 2785 | PCMCIA_DEVICE_NULL |
| 2786 | }; |
| 2787 | MODULE_DEVICE_TABLE(pcmcia, mgslpc_ids); |
| 2788 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2789 | static struct pcmcia_driver mgslpc_driver = { |
| 2790 | .owner = THIS_MODULE, |
Dominik Brodowski | 2e9b981 | 2010-08-08 11:36:26 +0200 | [diff] [blame] | 2791 | .name = "synclink_cs", |
Dominik Brodowski | 15b99ac | 2006-03-31 17:26:06 +0200 | [diff] [blame] | 2792 | .probe = mgslpc_probe, |
Dominik Brodowski | cc3b486 | 2005-11-14 21:23:14 +0100 | [diff] [blame] | 2793 | .remove = mgslpc_detach, |
Dominik Brodowski | 4af48c8 | 2005-06-27 16:28:42 -0700 | [diff] [blame] | 2794 | .id_table = mgslpc_ids, |
Dominik Brodowski | 98e4c28 | 2005-11-14 21:21:18 +0100 | [diff] [blame] | 2795 | .suspend = mgslpc_suspend, |
| 2796 | .resume = mgslpc_resume, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2797 | }; |
| 2798 | |
Jeff Dike | b68e31d | 2006-10-02 02:17:18 -0700 | [diff] [blame] | 2799 | static const struct tty_operations mgslpc_ops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2800 | .open = mgslpc_open, |
| 2801 | .close = mgslpc_close, |
| 2802 | .write = mgslpc_write, |
| 2803 | .put_char = mgslpc_put_char, |
| 2804 | .flush_chars = mgslpc_flush_chars, |
| 2805 | .write_room = mgslpc_write_room, |
| 2806 | .chars_in_buffer = mgslpc_chars_in_buffer, |
| 2807 | .flush_buffer = mgslpc_flush_buffer, |
| 2808 | .ioctl = mgslpc_ioctl, |
| 2809 | .throttle = mgslpc_throttle, |
| 2810 | .unthrottle = mgslpc_unthrottle, |
| 2811 | .send_xchar = mgslpc_send_xchar, |
| 2812 | .break_ctl = mgslpc_break, |
| 2813 | .wait_until_sent = mgslpc_wait_until_sent, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2814 | .set_termios = mgslpc_set_termios, |
| 2815 | .stop = tx_pause, |
| 2816 | .start = tx_release, |
| 2817 | .hangup = mgslpc_hangup, |
| 2818 | .tiocmget = tiocmget, |
| 2819 | .tiocmset = tiocmset, |
Andres Salomon | dc98d96 | 2010-11-09 14:10:38 -0800 | [diff] [blame] | 2820 | .get_icount = mgslpc_get_icount, |
Alexey Dobriyan | 8768714 | 2009-03-31 15:19:17 -0700 | [diff] [blame] | 2821 | .proc_fops = &mgslpc_proc_fops, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2822 | }; |
| 2823 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2824 | static int __init synclink_cs_init(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2825 | { |
| 2826 | int rc; |
| 2827 | |
Jiri Slaby | cc93441e | 2012-08-07 21:47:54 +0200 | [diff] [blame] | 2828 | if (break_on_load) { |
| 2829 | mgslpc_get_text_ptr(); |
| 2830 | BREAKPOINT(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2831 | } |
| 2832 | |
Jiri Slaby | cc93441e | 2012-08-07 21:47:54 +0200 | [diff] [blame] | 2833 | serial_driver = tty_alloc_driver(MAX_DEVICE_COUNT, |
| 2834 | TTY_DRIVER_REAL_RAW | |
| 2835 | TTY_DRIVER_DYNAMIC_DEV); |
Dan Carpenter | c3a6344 | 2012-08-16 16:16:56 +0300 | [diff] [blame] | 2836 | if (IS_ERR(serial_driver)) { |
| 2837 | rc = PTR_ERR(serial_driver); |
Jiri Slaby | cc93441e | 2012-08-07 21:47:54 +0200 | [diff] [blame] | 2838 | goto err; |
| 2839 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2840 | |
Jiri Slaby | cc93441e | 2012-08-07 21:47:54 +0200 | [diff] [blame] | 2841 | /* Initialize the tty_driver structure */ |
| 2842 | serial_driver->driver_name = "synclink_cs"; |
| 2843 | serial_driver->name = "ttySLP"; |
| 2844 | serial_driver->major = ttymajor; |
| 2845 | serial_driver->minor_start = 64; |
| 2846 | serial_driver->type = TTY_DRIVER_TYPE_SERIAL; |
| 2847 | serial_driver->subtype = SERIAL_TYPE_NORMAL; |
| 2848 | serial_driver->init_termios = tty_std_termios; |
| 2849 | serial_driver->init_termios.c_cflag = |
| 2850 | B9600 | CS8 | CREAD | HUPCL | CLOCAL; |
| 2851 | tty_set_operations(serial_driver, &mgslpc_ops); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2852 | |
Jiri Slaby | cc93441e | 2012-08-07 21:47:54 +0200 | [diff] [blame] | 2853 | rc = tty_register_driver(serial_driver); |
| 2854 | if (rc < 0) { |
| 2855 | printk(KERN_ERR "%s(%d):Couldn't register serial driver\n", |
| 2856 | __FILE__, __LINE__); |
| 2857 | goto err_put_tty; |
| 2858 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2859 | |
Jiri Slaby | 16a1065 | 2012-08-07 21:47:53 +0200 | [diff] [blame] | 2860 | rc = pcmcia_register_driver(&mgslpc_driver); |
| 2861 | if (rc < 0) |
| 2862 | goto err_unreg_tty; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2863 | |
Jiri Slaby | cc93441e | 2012-08-07 21:47:54 +0200 | [diff] [blame] | 2864 | printk(KERN_INFO "%s %s, tty major#%d\n", driver_name, driver_version, |
| 2865 | serial_driver->major); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2866 | |
Jiri Slaby | 737586f | 2012-08-07 21:47:52 +0200 | [diff] [blame] | 2867 | return 0; |
Jiri Slaby | 16a1065 | 2012-08-07 21:47:53 +0200 | [diff] [blame] | 2868 | err_unreg_tty: |
| 2869 | tty_unregister_driver(serial_driver); |
Jiri Slaby | 737586f | 2012-08-07 21:47:52 +0200 | [diff] [blame] | 2870 | err_put_tty: |
| 2871 | put_tty_driver(serial_driver); |
Jiri Slaby | 16a1065 | 2012-08-07 21:47:53 +0200 | [diff] [blame] | 2872 | err: |
Jiri Slaby | 737586f | 2012-08-07 21:47:52 +0200 | [diff] [blame] | 2873 | return rc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2874 | } |
| 2875 | |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 2876 | static void __exit synclink_cs_exit(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2877 | { |
Jiri Slaby | 16a1065 | 2012-08-07 21:47:53 +0200 | [diff] [blame] | 2878 | pcmcia_unregister_driver(&mgslpc_driver); |
Jiri Slaby | 737586f | 2012-08-07 21:47:52 +0200 | [diff] [blame] | 2879 | tty_unregister_driver(serial_driver); |
| 2880 | put_tty_driver(serial_driver); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2881 | } |
| 2882 | |
| 2883 | module_init(synclink_cs_init); |
| 2884 | module_exit(synclink_cs_exit); |
| 2885 | |
| 2886 | static void mgslpc_set_rate(MGSLPC_INFO *info, unsigned char channel, unsigned int rate) |
| 2887 | { |
| 2888 | unsigned int M, N; |
| 2889 | unsigned char val; |
| 2890 | |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 2891 | /* note:standard BRG mode is broken in V3.2 chip |
| 2892 | * so enhanced mode is always used |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2893 | */ |
| 2894 | |
| 2895 | if (rate) { |
| 2896 | N = 3686400 / rate; |
| 2897 | if (!N) |
| 2898 | N = 1; |
| 2899 | N >>= 1; |
| 2900 | for (M = 1; N > 64 && M < 16; M++) |
| 2901 | N >>= 1; |
| 2902 | N--; |
| 2903 | |
| 2904 | /* BGR[5..0] = N |
| 2905 | * BGR[9..6] = M |
| 2906 | * BGR[7..0] contained in BGR register |
| 2907 | * BGR[9..8] contained in CCR2[7..6] |
| 2908 | * divisor = (N+1)*2^M |
| 2909 | * |
| 2910 | * Note: M *must* not be zero (causes asymetric duty cycle) |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 2911 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2912 | write_reg(info, (unsigned char) (channel + BGR), |
| 2913 | (unsigned char) ((M << 6) + N)); |
| 2914 | val = read_reg(info, (unsigned char) (channel + CCR2)) & 0x3f; |
| 2915 | val |= ((M << 4) & 0xc0); |
| 2916 | write_reg(info, (unsigned char) (channel + CCR2), val); |
| 2917 | } |
| 2918 | } |
| 2919 | |
| 2920 | /* Enabled the AUX clock output at the specified frequency. |
| 2921 | */ |
| 2922 | static void enable_auxclk(MGSLPC_INFO *info) |
| 2923 | { |
| 2924 | unsigned char val; |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 2925 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2926 | /* MODE |
| 2927 | * |
| 2928 | * 07..06 MDS[1..0] 10 = transparent HDLC mode |
| 2929 | * 05 ADM Address Mode, 0 = no addr recognition |
| 2930 | * 04 TMD Timer Mode, 0 = external |
| 2931 | * 03 RAC Receiver Active, 0 = inactive |
| 2932 | * 02 RTS 0=RTS active during xmit, 1=RTS always active |
| 2933 | * 01 TRS Timer Resolution, 1=512 |
| 2934 | * 00 TLP Test Loop, 0 = no loop |
| 2935 | * |
| 2936 | * 1000 0010 |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 2937 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2938 | val = 0x82; |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 2939 | |
| 2940 | /* channel B RTS is used to enable AUXCLK driver on SP505 */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2941 | if (info->params.mode == MGSL_MODE_HDLC && info->params.clock_speed) |
| 2942 | val |= BIT2; |
| 2943 | write_reg(info, CHB + MODE, val); |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 2944 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2945 | /* CCR0 |
| 2946 | * |
| 2947 | * 07 PU Power Up, 1=active, 0=power down |
| 2948 | * 06 MCE Master Clock Enable, 1=enabled |
| 2949 | * 05 Reserved, 0 |
| 2950 | * 04..02 SC[2..0] Encoding |
| 2951 | * 01..00 SM[1..0] Serial Mode, 00=HDLC |
| 2952 | * |
| 2953 | * 11000000 |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 2954 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2955 | write_reg(info, CHB + CCR0, 0xc0); |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 2956 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2957 | /* CCR1 |
| 2958 | * |
| 2959 | * 07 SFLG Shared Flag, 0 = disable shared flags |
| 2960 | * 06 GALP Go Active On Loop, 0 = not used |
| 2961 | * 05 GLP Go On Loop, 0 = not used |
| 2962 | * 04 ODS Output Driver Select, 1=TxD is push-pull output |
| 2963 | * 03 ITF Interframe Time Fill, 0=mark, 1=flag |
| 2964 | * 02..00 CM[2..0] Clock Mode |
| 2965 | * |
| 2966 | * 0001 0111 |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 2967 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2968 | write_reg(info, CHB + CCR1, 0x17); |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 2969 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2970 | /* CCR2 (Channel B) |
| 2971 | * |
| 2972 | * 07..06 BGR[9..8] Baud rate bits 9..8 |
| 2973 | * 05 BDF Baud rate divisor factor, 0=1, 1=BGR value |
| 2974 | * 04 SSEL Clock source select, 1=submode b |
| 2975 | * 03 TOE 0=TxCLK is input, 1=TxCLK is output |
| 2976 | * 02 RWX Read/Write Exchange 0=disabled |
| 2977 | * 01 C32, CRC select, 0=CRC-16, 1=CRC-32 |
| 2978 | * 00 DIV, data inversion 0=disabled, 1=enabled |
| 2979 | * |
| 2980 | * 0011 1000 |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 2981 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2982 | if (info->params.mode == MGSL_MODE_HDLC && info->params.clock_speed) |
| 2983 | write_reg(info, CHB + CCR2, 0x38); |
| 2984 | else |
| 2985 | write_reg(info, CHB + CCR2, 0x30); |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 2986 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2987 | /* CCR4 |
| 2988 | * |
| 2989 | * 07 MCK4 Master Clock Divide by 4, 1=enabled |
| 2990 | * 06 EBRG Enhanced Baud Rate Generator Mode, 1=enabled |
| 2991 | * 05 TST1 Test Pin, 0=normal operation |
| 2992 | * 04 ICD Ivert Carrier Detect, 1=enabled (active low) |
| 2993 | * 03..02 Reserved, must be 0 |
| 2994 | * 01..00 RFT[1..0] RxFIFO Threshold 00=32 bytes |
| 2995 | * |
| 2996 | * 0101 0000 |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 2997 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2998 | write_reg(info, CHB + CCR4, 0x50); |
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 auxclk not enabled, set internal BRG so |
| 3001 | * CTS transitions can be detected (requires TxC) |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 3002 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3003 | if (info->params.mode == MGSL_MODE_HDLC && info->params.clock_speed) |
| 3004 | mgslpc_set_rate(info, CHB, info->params.clock_speed); |
| 3005 | else |
| 3006 | mgslpc_set_rate(info, CHB, 921600); |
| 3007 | } |
| 3008 | |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 3009 | static void loopback_enable(MGSLPC_INFO *info) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3010 | { |
| 3011 | unsigned char val; |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 3012 | |
| 3013 | /* CCR1:02..00 CM[2..0] Clock Mode = 111 (clock mode 7) */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3014 | val = read_reg(info, CHA + CCR1) | (BIT2 + BIT1 + BIT0); |
| 3015 | write_reg(info, CHA + CCR1, val); |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 3016 | |
| 3017 | /* CCR2:04 SSEL Clock source select, 1=submode b */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3018 | val = read_reg(info, CHA + CCR2) | (BIT4 + BIT5); |
| 3019 | write_reg(info, CHA + CCR2, val); |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 3020 | |
| 3021 | /* set LinkSpeed if available, otherwise default to 2Mbps */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3022 | if (info->params.clock_speed) |
| 3023 | mgslpc_set_rate(info, CHA, info->params.clock_speed); |
| 3024 | else |
| 3025 | mgslpc_set_rate(info, CHA, 1843200); |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 3026 | |
| 3027 | /* MODE:00 TLP Test Loop, 1=loopback enabled */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3028 | val = read_reg(info, CHA + MODE) | BIT0; |
| 3029 | write_reg(info, CHA + MODE, val); |
| 3030 | } |
| 3031 | |
Peter Hagervall | cdaad34 | 2006-06-23 02:06:04 -0700 | [diff] [blame] | 3032 | static void hdlc_mode(MGSLPC_INFO *info) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3033 | { |
| 3034 | unsigned char val; |
| 3035 | unsigned char clkmode, clksubmode; |
| 3036 | |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 3037 | /* disable all interrupts */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3038 | irq_disable(info, CHA, 0xffff); |
| 3039 | irq_disable(info, CHB, 0xffff); |
| 3040 | port_irq_disable(info, 0xff); |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 3041 | |
| 3042 | /* assume clock mode 0a, rcv=RxC xmt=TxC */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3043 | clkmode = clksubmode = 0; |
| 3044 | if (info->params.flags & HDLC_FLAG_RXC_DPLL |
| 3045 | && info->params.flags & HDLC_FLAG_TXC_DPLL) { |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 3046 | /* clock mode 7a, rcv = DPLL, xmt = DPLL */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3047 | clkmode = 7; |
| 3048 | } else if (info->params.flags & HDLC_FLAG_RXC_BRG |
| 3049 | && info->params.flags & HDLC_FLAG_TXC_BRG) { |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 3050 | /* clock mode 7b, rcv = BRG, xmt = BRG */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3051 | clkmode = 7; |
| 3052 | clksubmode = 1; |
| 3053 | } else if (info->params.flags & HDLC_FLAG_RXC_DPLL) { |
| 3054 | if (info->params.flags & HDLC_FLAG_TXC_BRG) { |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 3055 | /* clock mode 6b, rcv = DPLL, xmt = BRG/16 */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3056 | clkmode = 6; |
| 3057 | clksubmode = 1; |
| 3058 | } else { |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 3059 | /* clock mode 6a, rcv = DPLL, xmt = TxC */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3060 | clkmode = 6; |
| 3061 | } |
| 3062 | } else if (info->params.flags & HDLC_FLAG_TXC_BRG) { |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 3063 | /* clock mode 0b, rcv = RxC, xmt = BRG */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3064 | clksubmode = 1; |
| 3065 | } |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 3066 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3067 | /* MODE |
| 3068 | * |
| 3069 | * 07..06 MDS[1..0] 10 = transparent HDLC mode |
| 3070 | * 05 ADM Address Mode, 0 = no addr recognition |
| 3071 | * 04 TMD Timer Mode, 0 = external |
| 3072 | * 03 RAC Receiver Active, 0 = inactive |
| 3073 | * 02 RTS 0=RTS active during xmit, 1=RTS always active |
| 3074 | * 01 TRS Timer Resolution, 1=512 |
| 3075 | * 00 TLP Test Loop, 0 = no loop |
| 3076 | * |
| 3077 | * 1000 0010 |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 3078 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3079 | val = 0x82; |
| 3080 | if (info->params.loopback) |
| 3081 | val |= BIT0; |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 3082 | |
| 3083 | /* preserve RTS state */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3084 | if (info->serial_signals & SerialSignal_RTS) |
| 3085 | val |= BIT2; |
| 3086 | write_reg(info, CHA + MODE, val); |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 3087 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3088 | /* CCR0 |
| 3089 | * |
| 3090 | * 07 PU Power Up, 1=active, 0=power down |
| 3091 | * 06 MCE Master Clock Enable, 1=enabled |
| 3092 | * 05 Reserved, 0 |
| 3093 | * 04..02 SC[2..0] Encoding |
| 3094 | * 01..00 SM[1..0] Serial Mode, 00=HDLC |
| 3095 | * |
| 3096 | * 11000000 |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 3097 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3098 | val = 0xc0; |
| 3099 | switch (info->params.encoding) |
| 3100 | { |
| 3101 | case HDLC_ENCODING_NRZI: |
| 3102 | val |= BIT3; |
| 3103 | break; |
| 3104 | case HDLC_ENCODING_BIPHASE_SPACE: |
| 3105 | val |= BIT4; |
| 3106 | break; // FM0 |
| 3107 | case HDLC_ENCODING_BIPHASE_MARK: |
| 3108 | val |= BIT4 + BIT2; |
| 3109 | break; // FM1 |
| 3110 | case HDLC_ENCODING_BIPHASE_LEVEL: |
| 3111 | val |= BIT4 + BIT3; |
| 3112 | break; // Manchester |
| 3113 | } |
| 3114 | write_reg(info, CHA + CCR0, val); |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 3115 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3116 | /* CCR1 |
| 3117 | * |
| 3118 | * 07 SFLG Shared Flag, 0 = disable shared flags |
| 3119 | * 06 GALP Go Active On Loop, 0 = not used |
| 3120 | * 05 GLP Go On Loop, 0 = not used |
| 3121 | * 04 ODS Output Driver Select, 1=TxD is push-pull output |
| 3122 | * 03 ITF Interframe Time Fill, 0=mark, 1=flag |
| 3123 | * 02..00 CM[2..0] Clock Mode |
| 3124 | * |
| 3125 | * 0001 0000 |
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 | val = 0x10 + clkmode; |
| 3128 | write_reg(info, CHA + CCR1, val); |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 3129 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3130 | /* CCR2 |
| 3131 | * |
| 3132 | * 07..06 BGR[9..8] Baud rate bits 9..8 |
| 3133 | * 05 BDF Baud rate divisor factor, 0=1, 1=BGR value |
| 3134 | * 04 SSEL Clock source select, 1=submode b |
| 3135 | * 03 TOE 0=TxCLK is input, 0=TxCLK is input |
| 3136 | * 02 RWX Read/Write Exchange 0=disabled |
| 3137 | * 01 C32, CRC select, 0=CRC-16, 1=CRC-32 |
| 3138 | * 00 DIV, data inversion 0=disabled, 1=enabled |
| 3139 | * |
| 3140 | * 0000 0000 |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 3141 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3142 | val = 0x00; |
| 3143 | if (clkmode == 2 || clkmode == 3 || clkmode == 6 |
| 3144 | || clkmode == 7 || (clkmode == 0 && clksubmode == 1)) |
| 3145 | val |= BIT5; |
| 3146 | if (clksubmode) |
| 3147 | val |= BIT4; |
| 3148 | if (info->params.crc_type == HDLC_CRC_32_CCITT) |
| 3149 | val |= BIT1; |
| 3150 | if (info->params.encoding == HDLC_ENCODING_NRZB) |
| 3151 | val |= BIT0; |
| 3152 | write_reg(info, CHA + CCR2, val); |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 3153 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3154 | /* CCR3 |
| 3155 | * |
| 3156 | * 07..06 PRE[1..0] Preamble count 00=1, 01=2, 10=4, 11=8 |
| 3157 | * 05 EPT Enable preamble transmission, 1=enabled |
| 3158 | * 04 RADD Receive address pushed to FIFO, 0=disabled |
| 3159 | * 03 CRL CRC Reset Level, 0=FFFF |
| 3160 | * 02 RCRC Rx CRC 0=On 1=Off |
| 3161 | * 01 TCRC Tx CRC 0=On 1=Off |
| 3162 | * 00 PSD DPLL Phase Shift Disable |
| 3163 | * |
| 3164 | * 0000 0000 |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 3165 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3166 | val = 0x00; |
| 3167 | if (info->params.crc_type == HDLC_CRC_NONE) |
| 3168 | val |= BIT2 + BIT1; |
| 3169 | if (info->params.preamble != HDLC_PREAMBLE_PATTERN_NONE) |
| 3170 | val |= BIT5; |
| 3171 | switch (info->params.preamble_length) |
| 3172 | { |
| 3173 | case HDLC_PREAMBLE_LENGTH_16BITS: |
| 3174 | val |= BIT6; |
| 3175 | break; |
| 3176 | case HDLC_PREAMBLE_LENGTH_32BITS: |
| 3177 | val |= BIT6; |
| 3178 | break; |
| 3179 | case HDLC_PREAMBLE_LENGTH_64BITS: |
| 3180 | val |= BIT7 + BIT6; |
| 3181 | break; |
| 3182 | } |
| 3183 | write_reg(info, CHA + CCR3, val); |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 3184 | |
| 3185 | /* PRE - Preamble pattern */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3186 | val = 0; |
| 3187 | switch (info->params.preamble) |
| 3188 | { |
| 3189 | case HDLC_PREAMBLE_PATTERN_FLAGS: val = 0x7e; break; |
| 3190 | case HDLC_PREAMBLE_PATTERN_10: val = 0xaa; break; |
| 3191 | case HDLC_PREAMBLE_PATTERN_01: val = 0x55; break; |
| 3192 | case HDLC_PREAMBLE_PATTERN_ONES: val = 0xff; break; |
| 3193 | } |
| 3194 | write_reg(info, CHA + PRE, val); |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 3195 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3196 | /* CCR4 |
| 3197 | * |
| 3198 | * 07 MCK4 Master Clock Divide by 4, 1=enabled |
| 3199 | * 06 EBRG Enhanced Baud Rate Generator Mode, 1=enabled |
| 3200 | * 05 TST1 Test Pin, 0=normal operation |
| 3201 | * 04 ICD Ivert Carrier Detect, 1=enabled (active low) |
| 3202 | * 03..02 Reserved, must be 0 |
| 3203 | * 01..00 RFT[1..0] RxFIFO Threshold 00=32 bytes |
| 3204 | * |
| 3205 | * 0101 0000 |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 3206 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3207 | val = 0x50; |
| 3208 | write_reg(info, CHA + CCR4, val); |
| 3209 | if (info->params.flags & HDLC_FLAG_RXC_DPLL) |
| 3210 | mgslpc_set_rate(info, CHA, info->params.clock_speed * 16); |
| 3211 | else |
| 3212 | mgslpc_set_rate(info, CHA, info->params.clock_speed); |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 3213 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3214 | /* RLCR Receive length check register |
| 3215 | * |
| 3216 | * 7 1=enable receive length check |
| 3217 | * 6..0 Max frame length = (RL + 1) * 32 |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 3218 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3219 | write_reg(info, CHA + RLCR, 0); |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 3220 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3221 | /* XBCH Transmit Byte Count High |
| 3222 | * |
| 3223 | * 07 DMA mode, 0 = interrupt driven |
| 3224 | * 06 NRM, 0=ABM (ignored) |
| 3225 | * 05 CAS Carrier Auto Start |
| 3226 | * 04 XC Transmit Continuously (ignored) |
| 3227 | * 03..00 XBC[10..8] Transmit byte count bits 10..8 |
| 3228 | * |
| 3229 | * 0000 0000 |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 3230 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3231 | val = 0x00; |
| 3232 | if (info->params.flags & HDLC_FLAG_AUTO_DCD) |
| 3233 | val |= BIT5; |
| 3234 | write_reg(info, CHA + XBCH, val); |
| 3235 | enable_auxclk(info); |
| 3236 | if (info->params.loopback || info->testing_irq) |
| 3237 | loopback_enable(info); |
| 3238 | if (info->params.flags & HDLC_FLAG_AUTO_CTS) |
| 3239 | { |
| 3240 | irq_enable(info, CHB, IRQ_CTS); |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 3241 | /* PVR[3] 1=AUTO CTS active */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3242 | set_reg_bits(info, CHA + PVR, BIT3); |
| 3243 | } else |
| 3244 | clear_reg_bits(info, CHA + PVR, BIT3); |
| 3245 | |
| 3246 | irq_enable(info, CHA, |
| 3247 | IRQ_RXEOM + IRQ_RXFIFO + IRQ_ALLSENT + |
| 3248 | IRQ_UNDERRUN + IRQ_TXFIFO); |
| 3249 | issue_command(info, CHA, CMD_TXRESET + CMD_RXRESET); |
| 3250 | wait_command_complete(info, CHA); |
| 3251 | read_reg16(info, CHA + ISR); /* clear pending IRQs */ |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 3252 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3253 | /* Master clock mode enabled above to allow reset commands |
| 3254 | * to complete even if no data clocks are present. |
| 3255 | * |
| 3256 | * Disable master clock mode for normal communications because |
| 3257 | * V3.2 of the ESCC2 has a bug that prevents the transmit all sent |
| 3258 | * IRQ when in master clock mode. |
| 3259 | * |
| 3260 | * Leave master clock mode enabled for IRQ test because the |
| 3261 | * 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] | 3262 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3263 | if (!info->testing_irq) |
| 3264 | clear_reg_bits(info, CHA + CCR0, BIT6); |
| 3265 | |
| 3266 | tx_set_idle(info); |
| 3267 | |
| 3268 | tx_stop(info); |
| 3269 | rx_stop(info); |
| 3270 | } |
| 3271 | |
Peter Hagervall | cdaad34 | 2006-06-23 02:06:04 -0700 | [diff] [blame] | 3272 | static void rx_stop(MGSLPC_INFO *info) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3273 | { |
| 3274 | if (debug_level >= DEBUG_LEVEL_ISR) |
| 3275 | printk("%s(%d):rx_stop(%s)\n", |
| 3276 | __FILE__,__LINE__, info->device_name ); |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 3277 | |
| 3278 | /* MODE:03 RAC Receiver Active, 0=inactive */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3279 | clear_reg_bits(info, CHA + MODE, BIT3); |
| 3280 | |
Joe Perches | 0fab6de | 2008-04-28 02:14:02 -0700 | [diff] [blame] | 3281 | info->rx_enabled = false; |
| 3282 | info->rx_overflow = false; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3283 | } |
| 3284 | |
Peter Hagervall | cdaad34 | 2006-06-23 02:06:04 -0700 | [diff] [blame] | 3285 | static void rx_start(MGSLPC_INFO *info) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3286 | { |
| 3287 | if (debug_level >= DEBUG_LEVEL_ISR) |
| 3288 | printk("%s(%d):rx_start(%s)\n", |
| 3289 | __FILE__,__LINE__, info->device_name ); |
| 3290 | |
| 3291 | rx_reset_buffers(info); |
Joe Perches | 0fab6de | 2008-04-28 02:14:02 -0700 | [diff] [blame] | 3292 | info->rx_enabled = false; |
| 3293 | info->rx_overflow = false; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3294 | |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 3295 | /* MODE:03 RAC Receiver Active, 1=active */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3296 | set_reg_bits(info, CHA + MODE, BIT3); |
| 3297 | |
Joe Perches | 0fab6de | 2008-04-28 02:14:02 -0700 | [diff] [blame] | 3298 | info->rx_enabled = true; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3299 | } |
| 3300 | |
Alan Cox | eeb4613 | 2009-01-02 13:48:47 +0000 | [diff] [blame] | 3301 | static void tx_start(MGSLPC_INFO *info, struct tty_struct *tty) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3302 | { |
| 3303 | if (debug_level >= DEBUG_LEVEL_ISR) |
| 3304 | printk("%s(%d):tx_start(%s)\n", |
| 3305 | __FILE__,__LINE__, info->device_name ); |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 3306 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3307 | if (info->tx_count) { |
| 3308 | /* If auto RTS enabled and RTS is inactive, then assert */ |
| 3309 | /* RTS and set a flag indicating that the driver should */ |
| 3310 | /* negate RTS when the transmission completes. */ |
Joe Perches | 0fab6de | 2008-04-28 02:14:02 -0700 | [diff] [blame] | 3311 | info->drop_rts_on_tx_done = false; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3312 | |
| 3313 | if (info->params.flags & HDLC_FLAG_AUTO_RTS) { |
| 3314 | get_signals(info); |
| 3315 | if (!(info->serial_signals & SerialSignal_RTS)) { |
| 3316 | info->serial_signals |= SerialSignal_RTS; |
| 3317 | set_signals(info); |
Joe Perches | 0fab6de | 2008-04-28 02:14:02 -0700 | [diff] [blame] | 3318 | info->drop_rts_on_tx_done = true; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3319 | } |
| 3320 | } |
| 3321 | |
| 3322 | if (info->params.mode == MGSL_MODE_ASYNC) { |
| 3323 | if (!info->tx_active) { |
Joe Perches | 0fab6de | 2008-04-28 02:14:02 -0700 | [diff] [blame] | 3324 | info->tx_active = true; |
Alan Cox | eeb4613 | 2009-01-02 13:48:47 +0000 | [diff] [blame] | 3325 | tx_ready(info, tty); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3326 | } |
| 3327 | } else { |
Joe Perches | 0fab6de | 2008-04-28 02:14:02 -0700 | [diff] [blame] | 3328 | info->tx_active = true; |
Alan Cox | eeb4613 | 2009-01-02 13:48:47 +0000 | [diff] [blame] | 3329 | tx_ready(info, tty); |
Jiri Slaby | 40565f1 | 2007-02-12 00:52:31 -0800 | [diff] [blame] | 3330 | mod_timer(&info->tx_timer, jiffies + |
| 3331 | msecs_to_jiffies(5000)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3332 | } |
| 3333 | } |
| 3334 | |
| 3335 | if (!info->tx_enabled) |
Joe Perches | 0fab6de | 2008-04-28 02:14:02 -0700 | [diff] [blame] | 3336 | info->tx_enabled = true; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3337 | } |
| 3338 | |
Peter Hagervall | cdaad34 | 2006-06-23 02:06:04 -0700 | [diff] [blame] | 3339 | static void tx_stop(MGSLPC_INFO *info) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3340 | { |
| 3341 | if (debug_level >= DEBUG_LEVEL_ISR) |
| 3342 | printk("%s(%d):tx_stop(%s)\n", |
| 3343 | __FILE__,__LINE__, info->device_name ); |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 3344 | |
| 3345 | del_timer(&info->tx_timer); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3346 | |
Joe Perches | 0fab6de | 2008-04-28 02:14:02 -0700 | [diff] [blame] | 3347 | info->tx_enabled = false; |
| 3348 | info->tx_active = false; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3349 | } |
| 3350 | |
| 3351 | /* Reset the adapter to a known state and prepare it for further use. |
| 3352 | */ |
Peter Hagervall | cdaad34 | 2006-06-23 02:06:04 -0700 | [diff] [blame] | 3353 | static void reset_device(MGSLPC_INFO *info) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3354 | { |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 3355 | /* power up both channels (set BIT7) */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3356 | write_reg(info, CHA + CCR0, 0x80); |
| 3357 | write_reg(info, CHB + CCR0, 0x80); |
| 3358 | write_reg(info, CHA + MODE, 0); |
| 3359 | write_reg(info, CHB + MODE, 0); |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 3360 | |
| 3361 | /* disable all interrupts */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3362 | irq_disable(info, CHA, 0xffff); |
| 3363 | irq_disable(info, CHB, 0xffff); |
| 3364 | port_irq_disable(info, 0xff); |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 3365 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3366 | /* PCR Port Configuration Register |
| 3367 | * |
| 3368 | * 07..04 DEC[3..0] Serial I/F select outputs |
| 3369 | * 03 output, 1=AUTO CTS control enabled |
| 3370 | * 02 RI Ring Indicator input 0=active |
| 3371 | * 01 DSR input 0=active |
| 3372 | * 00 DTR output 0=active |
| 3373 | * |
| 3374 | * 0000 0110 |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 3375 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3376 | write_reg(info, PCR, 0x06); |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 3377 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3378 | /* PVR Port Value Register |
| 3379 | * |
| 3380 | * 07..04 DEC[3..0] Serial I/F select (0000=disabled) |
| 3381 | * 03 AUTO CTS output 1=enabled |
| 3382 | * 02 RI Ring Indicator input |
| 3383 | * 01 DSR input |
| 3384 | * 00 DTR output (1=inactive) |
| 3385 | * |
| 3386 | * 0000 0001 |
| 3387 | */ |
| 3388 | // write_reg(info, PVR, PVR_DTR); |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 3389 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3390 | /* IPC Interrupt Port Configuration |
| 3391 | * |
| 3392 | * 07 VIS 1=Masked interrupts visible |
| 3393 | * 06..05 Reserved, 0 |
| 3394 | * 04..03 SLA Slave address, 00 ignored |
| 3395 | * 02 CASM Cascading Mode, 1=daisy chain |
| 3396 | * 01..00 IC[1..0] Interrupt Config, 01=push-pull output, active low |
| 3397 | * |
| 3398 | * 0000 0101 |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 3399 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3400 | write_reg(info, IPC, 0x05); |
| 3401 | } |
| 3402 | |
Peter Hagervall | cdaad34 | 2006-06-23 02:06:04 -0700 | [diff] [blame] | 3403 | static void async_mode(MGSLPC_INFO *info) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3404 | { |
| 3405 | unsigned char val; |
| 3406 | |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 3407 | /* disable all interrupts */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3408 | irq_disable(info, CHA, 0xffff); |
| 3409 | irq_disable(info, CHB, 0xffff); |
| 3410 | port_irq_disable(info, 0xff); |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 3411 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3412 | /* MODE |
| 3413 | * |
| 3414 | * 07 Reserved, 0 |
| 3415 | * 06 FRTS RTS State, 0=active |
| 3416 | * 05 FCTS Flow Control on CTS |
| 3417 | * 04 FLON Flow Control Enable |
| 3418 | * 03 RAC Receiver Active, 0 = inactive |
| 3419 | * 02 RTS 0=Auto RTS, 1=manual RTS |
| 3420 | * 01 TRS Timer Resolution, 1=512 |
| 3421 | * 00 TLP Test Loop, 0 = no loop |
| 3422 | * |
| 3423 | * 0000 0110 |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 3424 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3425 | val = 0x06; |
| 3426 | if (info->params.loopback) |
| 3427 | val |= BIT0; |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 3428 | |
| 3429 | /* preserve RTS state */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3430 | if (!(info->serial_signals & SerialSignal_RTS)) |
| 3431 | val |= BIT6; |
| 3432 | write_reg(info, CHA + MODE, val); |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 3433 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3434 | /* CCR0 |
| 3435 | * |
| 3436 | * 07 PU Power Up, 1=active, 0=power down |
| 3437 | * 06 MCE Master Clock Enable, 1=enabled |
| 3438 | * 05 Reserved, 0 |
| 3439 | * 04..02 SC[2..0] Encoding, 000=NRZ |
| 3440 | * 01..00 SM[1..0] Serial Mode, 11=Async |
| 3441 | * |
| 3442 | * 1000 0011 |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 3443 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3444 | write_reg(info, CHA + CCR0, 0x83); |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 3445 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3446 | /* CCR1 |
| 3447 | * |
| 3448 | * 07..05 Reserved, 0 |
| 3449 | * 04 ODS Output Driver Select, 1=TxD is push-pull output |
| 3450 | * 03 BCR Bit Clock Rate, 1=16x |
| 3451 | * 02..00 CM[2..0] Clock Mode, 111=BRG |
| 3452 | * |
| 3453 | * 0001 1111 |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 3454 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3455 | write_reg(info, CHA + CCR1, 0x1f); |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 3456 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3457 | /* CCR2 (channel A) |
| 3458 | * |
| 3459 | * 07..06 BGR[9..8] Baud rate bits 9..8 |
| 3460 | * 05 BDF Baud rate divisor factor, 0=1, 1=BGR value |
| 3461 | * 04 SSEL Clock source select, 1=submode b |
| 3462 | * 03 TOE 0=TxCLK is input, 0=TxCLK is input |
| 3463 | * 02 RWX Read/Write Exchange 0=disabled |
| 3464 | * 01 Reserved, 0 |
| 3465 | * 00 DIV, data inversion 0=disabled, 1=enabled |
| 3466 | * |
| 3467 | * 0001 0000 |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 3468 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3469 | write_reg(info, CHA + CCR2, 0x10); |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 3470 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3471 | /* CCR3 |
| 3472 | * |
| 3473 | * 07..01 Reserved, 0 |
| 3474 | * 00 PSD DPLL Phase Shift Disable |
| 3475 | * |
| 3476 | * 0000 0000 |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 3477 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3478 | write_reg(info, CHA + CCR3, 0); |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 3479 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3480 | /* CCR4 |
| 3481 | * |
| 3482 | * 07 MCK4 Master Clock Divide by 4, 1=enabled |
| 3483 | * 06 EBRG Enhanced Baud Rate Generator Mode, 1=enabled |
| 3484 | * 05 TST1 Test Pin, 0=normal operation |
| 3485 | * 04 ICD Ivert Carrier Detect, 1=enabled (active low) |
| 3486 | * 03..00 Reserved, must be 0 |
| 3487 | * |
| 3488 | * 0101 0000 |
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 | write_reg(info, CHA + CCR4, 0x50); |
| 3491 | mgslpc_set_rate(info, CHA, info->params.data_rate * 16); |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 3492 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3493 | /* DAFO Data Format |
| 3494 | * |
| 3495 | * 07 Reserved, 0 |
| 3496 | * 06 XBRK transmit break, 0=normal operation |
| 3497 | * 05 Stop bits (0=1, 1=2) |
| 3498 | * 04..03 PAR[1..0] Parity (01=odd, 10=even) |
| 3499 | * 02 PAREN Parity Enable |
| 3500 | * 01..00 CHL[1..0] Character Length (00=8, 01=7) |
| 3501 | * |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 3502 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3503 | val = 0x00; |
| 3504 | if (info->params.data_bits != 8) |
| 3505 | val |= BIT0; /* 7 bits */ |
| 3506 | if (info->params.stop_bits != 1) |
| 3507 | val |= BIT5; |
| 3508 | if (info->params.parity != ASYNC_PARITY_NONE) |
| 3509 | { |
| 3510 | val |= BIT2; /* Parity enable */ |
| 3511 | if (info->params.parity == ASYNC_PARITY_ODD) |
| 3512 | val |= BIT3; |
| 3513 | else |
| 3514 | val |= BIT4; |
| 3515 | } |
| 3516 | write_reg(info, CHA + DAFO, val); |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 3517 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3518 | /* RFC Rx FIFO Control |
| 3519 | * |
| 3520 | * 07 Reserved, 0 |
| 3521 | * 06 DPS, 1=parity bit not stored in data byte |
| 3522 | * 05 DXS, 0=all data stored in FIFO (including XON/XOFF) |
| 3523 | * 04 RFDF Rx FIFO Data Format, 1=status byte stored in FIFO |
| 3524 | * 03..02 RFTH[1..0], rx threshold, 11=16 status + 16 data byte |
| 3525 | * 01 Reserved, 0 |
| 3526 | * 00 TCDE Terminate Char Detect Enable, 0=disabled |
| 3527 | * |
| 3528 | * 0101 1100 |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 3529 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3530 | write_reg(info, CHA + RFC, 0x5c); |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 3531 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3532 | /* RLCR Receive length check register |
| 3533 | * |
| 3534 | * Max frame length = (RL + 1) * 32 |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 3535 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3536 | write_reg(info, CHA + RLCR, 0); |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 3537 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3538 | /* XBCH Transmit Byte Count High |
| 3539 | * |
| 3540 | * 07 DMA mode, 0 = interrupt driven |
| 3541 | * 06 NRM, 0=ABM (ignored) |
| 3542 | * 05 CAS Carrier Auto Start |
| 3543 | * 04 XC Transmit Continuously (ignored) |
| 3544 | * 03..00 XBC[10..8] Transmit byte count bits 10..8 |
| 3545 | * |
| 3546 | * 0000 0000 |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 3547 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3548 | val = 0x00; |
| 3549 | if (info->params.flags & HDLC_FLAG_AUTO_DCD) |
| 3550 | val |= BIT5; |
| 3551 | write_reg(info, CHA + XBCH, val); |
| 3552 | if (info->params.flags & HDLC_FLAG_AUTO_CTS) |
| 3553 | irq_enable(info, CHA, IRQ_CTS); |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 3554 | |
| 3555 | /* MODE:03 RAC Receiver Active, 1=active */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3556 | set_reg_bits(info, CHA + MODE, BIT3); |
| 3557 | enable_auxclk(info); |
| 3558 | if (info->params.flags & HDLC_FLAG_AUTO_CTS) { |
| 3559 | irq_enable(info, CHB, IRQ_CTS); |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 3560 | /* PVR[3] 1=AUTO CTS active */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3561 | set_reg_bits(info, CHA + PVR, BIT3); |
| 3562 | } else |
| 3563 | clear_reg_bits(info, CHA + PVR, BIT3); |
| 3564 | irq_enable(info, CHA, |
| 3565 | IRQ_RXEOM + IRQ_RXFIFO + IRQ_BREAK_ON + IRQ_RXTIME + |
| 3566 | IRQ_ALLSENT + IRQ_TXFIFO); |
| 3567 | issue_command(info, CHA, CMD_TXRESET + CMD_RXRESET); |
| 3568 | wait_command_complete(info, CHA); |
| 3569 | read_reg16(info, CHA + ISR); /* clear pending IRQs */ |
| 3570 | } |
| 3571 | |
| 3572 | /* Set the HDLC idle mode for the transmitter. |
| 3573 | */ |
Peter Hagervall | cdaad34 | 2006-06-23 02:06:04 -0700 | [diff] [blame] | 3574 | static void tx_set_idle(MGSLPC_INFO *info) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3575 | { |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 3576 | /* Note: ESCC2 only supports flags and one idle modes */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3577 | if (info->idle_mode == HDLC_TXIDLE_FLAGS) |
| 3578 | set_reg_bits(info, CHA + CCR1, BIT3); |
| 3579 | else |
| 3580 | clear_reg_bits(info, CHA + CCR1, BIT3); |
| 3581 | } |
| 3582 | |
| 3583 | /* get state of the V24 status (input) signals. |
| 3584 | */ |
Peter Hagervall | cdaad34 | 2006-06-23 02:06:04 -0700 | [diff] [blame] | 3585 | static void get_signals(MGSLPC_INFO *info) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3586 | { |
| 3587 | unsigned char status = 0; |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 3588 | |
| 3589 | /* preserve DTR and RTS */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3590 | info->serial_signals &= SerialSignal_DTR + SerialSignal_RTS; |
| 3591 | |
| 3592 | if (read_reg(info, CHB + VSTR) & BIT7) |
| 3593 | info->serial_signals |= SerialSignal_DCD; |
| 3594 | if (read_reg(info, CHB + STAR) & BIT1) |
| 3595 | info->serial_signals |= SerialSignal_CTS; |
| 3596 | |
| 3597 | status = read_reg(info, CHA + PVR); |
| 3598 | if (!(status & PVR_RI)) |
| 3599 | info->serial_signals |= SerialSignal_RI; |
| 3600 | if (!(status & PVR_DSR)) |
| 3601 | info->serial_signals |= SerialSignal_DSR; |
| 3602 | } |
| 3603 | |
| 3604 | /* Set the state of DTR and RTS based on contents of |
| 3605 | * serial_signals member of device extension. |
| 3606 | */ |
Peter Hagervall | cdaad34 | 2006-06-23 02:06:04 -0700 | [diff] [blame] | 3607 | static void set_signals(MGSLPC_INFO *info) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3608 | { |
| 3609 | unsigned char val; |
| 3610 | |
| 3611 | val = read_reg(info, CHA + MODE); |
| 3612 | if (info->params.mode == MGSL_MODE_ASYNC) { |
| 3613 | if (info->serial_signals & SerialSignal_RTS) |
| 3614 | val &= ~BIT6; |
| 3615 | else |
| 3616 | val |= BIT6; |
| 3617 | } else { |
| 3618 | if (info->serial_signals & SerialSignal_RTS) |
| 3619 | val |= BIT2; |
| 3620 | else |
| 3621 | val &= ~BIT2; |
| 3622 | } |
| 3623 | write_reg(info, CHA + MODE, val); |
| 3624 | |
| 3625 | if (info->serial_signals & SerialSignal_DTR) |
| 3626 | clear_reg_bits(info, CHA + PVR, PVR_DTR); |
| 3627 | else |
| 3628 | set_reg_bits(info, CHA + PVR, PVR_DTR); |
| 3629 | } |
| 3630 | |
Peter Hagervall | cdaad34 | 2006-06-23 02:06:04 -0700 | [diff] [blame] | 3631 | static void rx_reset_buffers(MGSLPC_INFO *info) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3632 | { |
| 3633 | RXBUF *buf; |
| 3634 | int i; |
| 3635 | |
| 3636 | info->rx_put = 0; |
| 3637 | info->rx_get = 0; |
| 3638 | info->rx_frame_count = 0; |
| 3639 | for (i=0 ; i < info->rx_buf_count ; i++) { |
| 3640 | buf = (RXBUF*)(info->rx_buf + (i * info->rx_buf_size)); |
| 3641 | buf->status = buf->count = 0; |
| 3642 | } |
| 3643 | } |
| 3644 | |
| 3645 | /* Attempt to return a received HDLC frame |
| 3646 | * Only frames received without errors are returned. |
| 3647 | * |
Joe Perches | 0fab6de | 2008-04-28 02:14:02 -0700 | [diff] [blame] | 3648 | * Returns true if frame returned, otherwise false |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3649 | */ |
Alan Cox | eeb4613 | 2009-01-02 13:48:47 +0000 | [diff] [blame] | 3650 | static bool rx_get_frame(MGSLPC_INFO *info, struct tty_struct *tty) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3651 | { |
| 3652 | unsigned short status; |
| 3653 | RXBUF *buf; |
| 3654 | unsigned int framesize = 0; |
| 3655 | unsigned long flags; |
Joe Perches | 0fab6de | 2008-04-28 02:14:02 -0700 | [diff] [blame] | 3656 | bool return_frame = false; |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 3657 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3658 | if (info->rx_frame_count == 0) |
Joe Perches | 0fab6de | 2008-04-28 02:14:02 -0700 | [diff] [blame] | 3659 | return false; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3660 | |
| 3661 | buf = (RXBUF*)(info->rx_buf + (info->rx_get * info->rx_buf_size)); |
| 3662 | |
| 3663 | status = buf->status; |
| 3664 | |
| 3665 | /* 07 VFR 1=valid frame |
| 3666 | * 06 RDO 1=data overrun |
| 3667 | * 05 CRC 1=OK, 0=error |
| 3668 | * 04 RAB 1=frame aborted |
| 3669 | */ |
| 3670 | if ((status & 0xf0) != 0xA0) { |
| 3671 | if (!(status & BIT7) || (status & BIT4)) |
| 3672 | info->icount.rxabort++; |
| 3673 | else if (status & BIT6) |
| 3674 | info->icount.rxover++; |
| 3675 | else if (!(status & BIT5)) { |
| 3676 | info->icount.rxcrc++; |
| 3677 | if (info->params.crc_type & HDLC_CRC_RETURN_EX) |
Joe Perches | 0fab6de | 2008-04-28 02:14:02 -0700 | [diff] [blame] | 3678 | return_frame = true; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3679 | } |
| 3680 | framesize = 0; |
Paul Fulghum | af69c7f | 2006-12-06 20:40:24 -0800 | [diff] [blame] | 3681 | #if SYNCLINK_GENERIC_HDLC |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3682 | { |
Krzysztof Halasa | 198191c | 2008-06-30 23:26:53 +0200 | [diff] [blame] | 3683 | info->netdev->stats.rx_errors++; |
| 3684 | info->netdev->stats.rx_frame_errors++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3685 | } |
| 3686 | #endif |
| 3687 | } else |
Joe Perches | 0fab6de | 2008-04-28 02:14:02 -0700 | [diff] [blame] | 3688 | return_frame = true; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3689 | |
| 3690 | if (return_frame) |
| 3691 | framesize = buf->count; |
| 3692 | |
| 3693 | if (debug_level >= DEBUG_LEVEL_BH) |
| 3694 | printk("%s(%d):rx_get_frame(%s) status=%04X size=%d\n", |
| 3695 | __FILE__,__LINE__,info->device_name,status,framesize); |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 3696 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3697 | if (debug_level >= DEBUG_LEVEL_DATA) |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 3698 | trace_block(info, buf->data, framesize, 0); |
| 3699 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3700 | if (framesize) { |
| 3701 | if ((info->params.crc_type & HDLC_CRC_RETURN_EX && |
| 3702 | framesize+1 > info->max_frame_size) || |
| 3703 | framesize > info->max_frame_size) |
| 3704 | info->icount.rxlong++; |
| 3705 | else { |
| 3706 | if (status & BIT5) |
| 3707 | info->icount.rxok++; |
| 3708 | |
| 3709 | if (info->params.crc_type & HDLC_CRC_RETURN_EX) { |
| 3710 | *(buf->data + framesize) = status & BIT5 ? RX_OK:RX_CRC_ERROR; |
| 3711 | ++framesize; |
| 3712 | } |
| 3713 | |
Paul Fulghum | af69c7f | 2006-12-06 20:40:24 -0800 | [diff] [blame] | 3714 | #if SYNCLINK_GENERIC_HDLC |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3715 | if (info->netcount) |
| 3716 | hdlcdev_rx(info, buf->data, framesize); |
| 3717 | else |
| 3718 | #endif |
| 3719 | ldisc_receive_buf(tty, buf->data, info->flag_buf, framesize); |
| 3720 | } |
| 3721 | } |
| 3722 | |
| 3723 | spin_lock_irqsave(&info->lock,flags); |
| 3724 | buf->status = buf->count = 0; |
| 3725 | info->rx_frame_count--; |
| 3726 | info->rx_get++; |
| 3727 | if (info->rx_get >= info->rx_buf_count) |
| 3728 | info->rx_get = 0; |
| 3729 | spin_unlock_irqrestore(&info->lock,flags); |
| 3730 | |
Joe Perches | 0fab6de | 2008-04-28 02:14:02 -0700 | [diff] [blame] | 3731 | return true; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3732 | } |
| 3733 | |
Joe Perches | 0fab6de | 2008-04-28 02:14:02 -0700 | [diff] [blame] | 3734 | static bool register_test(MGSLPC_INFO *info) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3735 | { |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 3736 | static unsigned char patterns[] = |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3737 | { 0x00, 0xff, 0xaa, 0x55, 0x69, 0x96, 0x0f }; |
Tobias Klauser | fe97107 | 2006-01-09 20:54:02 -0800 | [diff] [blame] | 3738 | static unsigned int count = ARRAY_SIZE(patterns); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3739 | unsigned int i; |
Joe Perches | 0fab6de | 2008-04-28 02:14:02 -0700 | [diff] [blame] | 3740 | bool rc = true; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3741 | unsigned long flags; |
| 3742 | |
| 3743 | spin_lock_irqsave(&info->lock,flags); |
| 3744 | reset_device(info); |
| 3745 | |
| 3746 | for (i = 0; i < count; i++) { |
| 3747 | write_reg(info, XAD1, patterns[i]); |
| 3748 | write_reg(info, XAD2, patterns[(i + 1) % count]); |
Tobias Klauser | fe97107 | 2006-01-09 20:54:02 -0800 | [diff] [blame] | 3749 | if ((read_reg(info, XAD1) != patterns[i]) || |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3750 | (read_reg(info, XAD2) != patterns[(i + 1) % count])) { |
Joe Perches | 0fab6de | 2008-04-28 02:14:02 -0700 | [diff] [blame] | 3751 | rc = false; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3752 | break; |
| 3753 | } |
| 3754 | } |
| 3755 | |
| 3756 | spin_unlock_irqrestore(&info->lock,flags); |
| 3757 | return rc; |
| 3758 | } |
| 3759 | |
Joe Perches | 0fab6de | 2008-04-28 02:14:02 -0700 | [diff] [blame] | 3760 | static bool irq_test(MGSLPC_INFO *info) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3761 | { |
| 3762 | unsigned long end_time; |
| 3763 | unsigned long flags; |
| 3764 | |
| 3765 | spin_lock_irqsave(&info->lock,flags); |
| 3766 | reset_device(info); |
| 3767 | |
Joe Perches | 0fab6de | 2008-04-28 02:14:02 -0700 | [diff] [blame] | 3768 | info->testing_irq = true; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3769 | hdlc_mode(info); |
| 3770 | |
Joe Perches | 0fab6de | 2008-04-28 02:14:02 -0700 | [diff] [blame] | 3771 | info->irq_occurred = false; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3772 | |
| 3773 | /* init hdlc mode */ |
| 3774 | |
| 3775 | irq_enable(info, CHA, IRQ_TIMER); |
| 3776 | write_reg(info, CHA + TIMR, 0); /* 512 cycles */ |
| 3777 | issue_command(info, CHA, CMD_START_TIMER); |
| 3778 | |
| 3779 | spin_unlock_irqrestore(&info->lock,flags); |
| 3780 | |
| 3781 | end_time=100; |
| 3782 | while(end_time-- && !info->irq_occurred) { |
| 3783 | msleep_interruptible(10); |
| 3784 | } |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 3785 | |
Joe Perches | 0fab6de | 2008-04-28 02:14:02 -0700 | [diff] [blame] | 3786 | info->testing_irq = false; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3787 | |
| 3788 | spin_lock_irqsave(&info->lock,flags); |
| 3789 | reset_device(info); |
| 3790 | spin_unlock_irqrestore(&info->lock,flags); |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 3791 | |
Joe Perches | 0fab6de | 2008-04-28 02:14:02 -0700 | [diff] [blame] | 3792 | return info->irq_occurred; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3793 | } |
| 3794 | |
Peter Hagervall | cdaad34 | 2006-06-23 02:06:04 -0700 | [diff] [blame] | 3795 | static int adapter_test(MGSLPC_INFO *info) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3796 | { |
| 3797 | if (!register_test(info)) { |
| 3798 | info->init_error = DiagStatus_AddressFailure; |
| 3799 | printk( "%s(%d):Register test failure for device %s Addr=%04X\n", |
| 3800 | __FILE__,__LINE__,info->device_name, (unsigned short)(info->io_base) ); |
| 3801 | return -ENODEV; |
| 3802 | } |
| 3803 | |
| 3804 | if (!irq_test(info)) { |
| 3805 | info->init_error = DiagStatus_IrqFailure; |
| 3806 | printk( "%s(%d):Interrupt test failure for device %s IRQ=%d\n", |
| 3807 | __FILE__,__LINE__,info->device_name, (unsigned short)(info->irq_level) ); |
| 3808 | return -ENODEV; |
| 3809 | } |
| 3810 | |
| 3811 | if (debug_level >= DEBUG_LEVEL_INFO) |
| 3812 | printk("%s(%d):device %s passed diagnostics\n", |
| 3813 | __FILE__,__LINE__,info->device_name); |
| 3814 | return 0; |
| 3815 | } |
| 3816 | |
Peter Hagervall | cdaad34 | 2006-06-23 02:06:04 -0700 | [diff] [blame] | 3817 | 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] | 3818 | { |
| 3819 | int i; |
| 3820 | int linecount; |
| 3821 | if (xmit) |
| 3822 | printk("%s tx data:\n",info->device_name); |
| 3823 | else |
| 3824 | printk("%s rx data:\n",info->device_name); |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 3825 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3826 | while(count) { |
| 3827 | if (count > 16) |
| 3828 | linecount = 16; |
| 3829 | else |
| 3830 | linecount = count; |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 3831 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3832 | for(i=0;i<linecount;i++) |
| 3833 | printk("%02X ",(unsigned char)data[i]); |
| 3834 | for(;i<17;i++) |
| 3835 | printk(" "); |
| 3836 | for(i=0;i<linecount;i++) { |
| 3837 | if (data[i]>=040 && data[i]<=0176) |
| 3838 | printk("%c",data[i]); |
| 3839 | else |
| 3840 | printk("."); |
| 3841 | } |
| 3842 | printk("\n"); |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 3843 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3844 | data += linecount; |
| 3845 | count -= linecount; |
| 3846 | } |
| 3847 | } |
| 3848 | |
| 3849 | /* HDLC frame time out |
| 3850 | * update stats and do tx completion processing |
| 3851 | */ |
Peter Hagervall | cdaad34 | 2006-06-23 02:06:04 -0700 | [diff] [blame] | 3852 | static void tx_timeout(unsigned long context) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3853 | { |
| 3854 | MGSLPC_INFO *info = (MGSLPC_INFO*)context; |
| 3855 | unsigned long flags; |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 3856 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3857 | if ( debug_level >= DEBUG_LEVEL_INFO ) |
| 3858 | printk( "%s(%d):tx_timeout(%s)\n", |
| 3859 | __FILE__,__LINE__,info->device_name); |
| 3860 | if(info->tx_active && |
| 3861 | info->params.mode == MGSL_MODE_HDLC) { |
| 3862 | info->icount.txtimeout++; |
| 3863 | } |
| 3864 | spin_lock_irqsave(&info->lock,flags); |
Joe Perches | 0fab6de | 2008-04-28 02:14:02 -0700 | [diff] [blame] | 3865 | info->tx_active = false; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3866 | info->tx_count = info->tx_put = info->tx_get = 0; |
| 3867 | |
| 3868 | spin_unlock_irqrestore(&info->lock,flags); |
Jeff Garzik | d12341f | 2007-10-19 15:45:35 -0400 | [diff] [blame] | 3869 | |
Paul Fulghum | af69c7f | 2006-12-06 20:40:24 -0800 | [diff] [blame] | 3870 | #if SYNCLINK_GENERIC_HDLC |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3871 | if (info->netcount) |
| 3872 | hdlcdev_tx_done(info); |
| 3873 | else |
| 3874 | #endif |
Alan Cox | eeb4613 | 2009-01-02 13:48:47 +0000 | [diff] [blame] | 3875 | { |
| 3876 | struct tty_struct *tty = tty_port_tty_get(&info->port); |
| 3877 | bh_transmit(info, tty); |
| 3878 | tty_kref_put(tty); |
| 3879 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3880 | } |
| 3881 | |
Paul Fulghum | af69c7f | 2006-12-06 20:40:24 -0800 | [diff] [blame] | 3882 | #if SYNCLINK_GENERIC_HDLC |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3883 | |
| 3884 | /** |
| 3885 | * called by generic HDLC layer when protocol selected (PPP, frame relay, etc.) |
| 3886 | * set encoding and frame check sequence (FCS) options |
| 3887 | * |
| 3888 | * dev pointer to network device structure |
| 3889 | * encoding serial encoding setting |
| 3890 | * parity FCS setting |
| 3891 | * |
| 3892 | * returns 0 if success, otherwise error code |
| 3893 | */ |
| 3894 | static int hdlcdev_attach(struct net_device *dev, unsigned short encoding, |
| 3895 | unsigned short parity) |
| 3896 | { |
| 3897 | MGSLPC_INFO *info = dev_to_port(dev); |
Alan Cox | eeb4613 | 2009-01-02 13:48:47 +0000 | [diff] [blame] | 3898 | struct tty_struct *tty; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3899 | unsigned char new_encoding; |
| 3900 | unsigned short new_crctype; |
| 3901 | |
| 3902 | /* return error if TTY interface open */ |
Alan Cox | eeb4613 | 2009-01-02 13:48:47 +0000 | [diff] [blame] | 3903 | if (info->port.count) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3904 | return -EBUSY; |
| 3905 | |
| 3906 | switch (encoding) |
| 3907 | { |
| 3908 | case ENCODING_NRZ: new_encoding = HDLC_ENCODING_NRZ; break; |
| 3909 | case ENCODING_NRZI: new_encoding = HDLC_ENCODING_NRZI_SPACE; break; |
| 3910 | case ENCODING_FM_MARK: new_encoding = HDLC_ENCODING_BIPHASE_MARK; break; |
| 3911 | case ENCODING_FM_SPACE: new_encoding = HDLC_ENCODING_BIPHASE_SPACE; break; |
| 3912 | case ENCODING_MANCHESTER: new_encoding = HDLC_ENCODING_BIPHASE_LEVEL; break; |
| 3913 | default: return -EINVAL; |
| 3914 | } |
| 3915 | |
| 3916 | switch (parity) |
| 3917 | { |
| 3918 | case PARITY_NONE: new_crctype = HDLC_CRC_NONE; break; |
| 3919 | case PARITY_CRC16_PR1_CCITT: new_crctype = HDLC_CRC_16_CCITT; break; |
| 3920 | case PARITY_CRC32_PR1_CCITT: new_crctype = HDLC_CRC_32_CCITT; break; |
| 3921 | default: return -EINVAL; |
| 3922 | } |
| 3923 | |
| 3924 | info->params.encoding = new_encoding; |
Alexey Dobriyan | 53b3531 | 2006-03-24 03:16:13 -0800 | [diff] [blame] | 3925 | info->params.crc_type = new_crctype; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3926 | |
| 3927 | /* if network interface up, reprogram hardware */ |
Alan Cox | eeb4613 | 2009-01-02 13:48:47 +0000 | [diff] [blame] | 3928 | if (info->netcount) { |
| 3929 | tty = tty_port_tty_get(&info->port); |
| 3930 | mgslpc_program_hw(info, tty); |
| 3931 | tty_kref_put(tty); |
| 3932 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3933 | |
| 3934 | return 0; |
| 3935 | } |
| 3936 | |
| 3937 | /** |
| 3938 | * called by generic HDLC layer to send frame |
| 3939 | * |
| 3940 | * skb socket buffer containing HDLC frame |
| 3941 | * dev pointer to network device structure |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3942 | */ |
Stephen Hemminger | 4c5d502 | 2009-08-31 19:50:48 +0000 | [diff] [blame] | 3943 | static netdev_tx_t hdlcdev_xmit(struct sk_buff *skb, |
| 3944 | struct net_device *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3945 | { |
| 3946 | MGSLPC_INFO *info = dev_to_port(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3947 | unsigned long flags; |
| 3948 | |
| 3949 | if (debug_level >= DEBUG_LEVEL_INFO) |
| 3950 | printk(KERN_INFO "%s:hdlc_xmit(%s)\n",__FILE__,dev->name); |
| 3951 | |
| 3952 | /* stop sending until this frame completes */ |
| 3953 | netif_stop_queue(dev); |
| 3954 | |
| 3955 | /* copy data to device buffers */ |
Arnaldo Carvalho de Melo | d626f62 | 2007-03-27 18:55:52 -0300 | [diff] [blame] | 3956 | skb_copy_from_linear_data(skb, info->tx_buf, skb->len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3957 | info->tx_get = 0; |
| 3958 | info->tx_put = info->tx_count = skb->len; |
| 3959 | |
| 3960 | /* update network statistics */ |
Krzysztof Halasa | 198191c | 2008-06-30 23:26:53 +0200 | [diff] [blame] | 3961 | dev->stats.tx_packets++; |
| 3962 | dev->stats.tx_bytes += skb->len; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3963 | |
| 3964 | /* done with socket buffer, so free it */ |
| 3965 | dev_kfree_skb(skb); |
| 3966 | |
| 3967 | /* save start time for transmit timeout detection */ |
| 3968 | dev->trans_start = jiffies; |
| 3969 | |
| 3970 | /* start hardware transmitter if necessary */ |
| 3971 | spin_lock_irqsave(&info->lock,flags); |
Alan Cox | eeb4613 | 2009-01-02 13:48:47 +0000 | [diff] [blame] | 3972 | if (!info->tx_active) { |
| 3973 | struct tty_struct *tty = tty_port_tty_get(&info->port); |
| 3974 | tx_start(info, tty); |
| 3975 | tty_kref_put(tty); |
| 3976 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3977 | spin_unlock_irqrestore(&info->lock,flags); |
| 3978 | |
Stephen Hemminger | 4c5d502 | 2009-08-31 19:50:48 +0000 | [diff] [blame] | 3979 | return NETDEV_TX_OK; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3980 | } |
| 3981 | |
| 3982 | /** |
| 3983 | * called by network layer when interface enabled |
| 3984 | * claim resources and initialize hardware |
| 3985 | * |
| 3986 | * dev pointer to network device structure |
| 3987 | * |
| 3988 | * returns 0 if success, otherwise error code |
| 3989 | */ |
| 3990 | static int hdlcdev_open(struct net_device *dev) |
| 3991 | { |
| 3992 | MGSLPC_INFO *info = dev_to_port(dev); |
Alan Cox | eeb4613 | 2009-01-02 13:48:47 +0000 | [diff] [blame] | 3993 | struct tty_struct *tty; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3994 | int rc; |
| 3995 | unsigned long flags; |
| 3996 | |
| 3997 | if (debug_level >= DEBUG_LEVEL_INFO) |
| 3998 | printk("%s:hdlcdev_open(%s)\n",__FILE__,dev->name); |
| 3999 | |
| 4000 | /* generic HDLC layer open processing */ |
| 4001 | if ((rc = hdlc_open(dev))) |
| 4002 | return rc; |
| 4003 | |
| 4004 | /* arbitrate between network and tty opens */ |
| 4005 | spin_lock_irqsave(&info->netlock, flags); |
Alan Cox | eeb4613 | 2009-01-02 13:48:47 +0000 | [diff] [blame] | 4006 | if (info->port.count != 0 || info->netcount != 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4007 | printk(KERN_WARNING "%s: hdlc_open returning busy\n", dev->name); |
| 4008 | spin_unlock_irqrestore(&info->netlock, flags); |
| 4009 | return -EBUSY; |
| 4010 | } |
| 4011 | info->netcount=1; |
| 4012 | spin_unlock_irqrestore(&info->netlock, flags); |
| 4013 | |
Alan Cox | eeb4613 | 2009-01-02 13:48:47 +0000 | [diff] [blame] | 4014 | tty = tty_port_tty_get(&info->port); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4015 | /* claim resources and init adapter */ |
Alan Cox | eeb4613 | 2009-01-02 13:48:47 +0000 | [diff] [blame] | 4016 | if ((rc = startup(info, tty)) != 0) { |
| 4017 | tty_kref_put(tty); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4018 | spin_lock_irqsave(&info->netlock, flags); |
| 4019 | info->netcount=0; |
| 4020 | spin_unlock_irqrestore(&info->netlock, flags); |
| 4021 | return rc; |
| 4022 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4023 | /* assert DTR and RTS, apply hardware settings */ |
| 4024 | info->serial_signals |= SerialSignal_RTS + SerialSignal_DTR; |
Alan Cox | eeb4613 | 2009-01-02 13:48:47 +0000 | [diff] [blame] | 4025 | mgslpc_program_hw(info, tty); |
| 4026 | tty_kref_put(tty); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4027 | |
| 4028 | /* enable network layer transmit */ |
| 4029 | dev->trans_start = jiffies; |
| 4030 | netif_start_queue(dev); |
| 4031 | |
| 4032 | /* inform generic HDLC layer of current DCD status */ |
| 4033 | spin_lock_irqsave(&info->lock, flags); |
| 4034 | get_signals(info); |
| 4035 | spin_unlock_irqrestore(&info->lock, flags); |
Krzysztof Halasa | fbeff3c | 2006-07-21 14:44:55 -0700 | [diff] [blame] | 4036 | if (info->serial_signals & SerialSignal_DCD) |
| 4037 | netif_carrier_on(dev); |
| 4038 | else |
| 4039 | netif_carrier_off(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4040 | return 0; |
| 4041 | } |
| 4042 | |
| 4043 | /** |
| 4044 | * called by network layer when interface is disabled |
| 4045 | * shutdown hardware and release resources |
| 4046 | * |
| 4047 | * dev pointer to network device structure |
| 4048 | * |
| 4049 | * returns 0 if success, otherwise error code |
| 4050 | */ |
| 4051 | static int hdlcdev_close(struct net_device *dev) |
| 4052 | { |
| 4053 | MGSLPC_INFO *info = dev_to_port(dev); |
Alan Cox | eeb4613 | 2009-01-02 13:48:47 +0000 | [diff] [blame] | 4054 | struct tty_struct *tty = tty_port_tty_get(&info->port); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4055 | unsigned long flags; |
| 4056 | |
| 4057 | if (debug_level >= DEBUG_LEVEL_INFO) |
| 4058 | printk("%s:hdlcdev_close(%s)\n",__FILE__,dev->name); |
| 4059 | |
| 4060 | netif_stop_queue(dev); |
| 4061 | |
| 4062 | /* shutdown adapter and release resources */ |
Alan Cox | eeb4613 | 2009-01-02 13:48:47 +0000 | [diff] [blame] | 4063 | shutdown(info, tty); |
| 4064 | tty_kref_put(tty); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4065 | hdlc_close(dev); |
| 4066 | |
| 4067 | spin_lock_irqsave(&info->netlock, flags); |
| 4068 | info->netcount=0; |
| 4069 | spin_unlock_irqrestore(&info->netlock, flags); |
| 4070 | |
| 4071 | return 0; |
| 4072 | } |
| 4073 | |
| 4074 | /** |
| 4075 | * called by network layer to process IOCTL call to network device |
| 4076 | * |
| 4077 | * dev pointer to network device structure |
| 4078 | * ifr pointer to network interface request structure |
| 4079 | * cmd IOCTL command code |
| 4080 | * |
| 4081 | * returns 0 if success, otherwise error code |
| 4082 | */ |
| 4083 | static int hdlcdev_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) |
| 4084 | { |
| 4085 | const size_t size = sizeof(sync_serial_settings); |
| 4086 | sync_serial_settings new_line; |
| 4087 | sync_serial_settings __user *line = ifr->ifr_settings.ifs_ifsu.sync; |
| 4088 | MGSLPC_INFO *info = dev_to_port(dev); |
| 4089 | unsigned int flags; |
| 4090 | |
| 4091 | if (debug_level >= DEBUG_LEVEL_INFO) |
| 4092 | printk("%s:hdlcdev_ioctl(%s)\n",__FILE__,dev->name); |
| 4093 | |
| 4094 | /* return error if TTY interface open */ |
Alan Cox | eeb4613 | 2009-01-02 13:48:47 +0000 | [diff] [blame] | 4095 | if (info->port.count) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4096 | return -EBUSY; |
| 4097 | |
| 4098 | if (cmd != SIOCWANDEV) |
| 4099 | return hdlc_ioctl(dev, ifr, cmd); |
| 4100 | |
Vasiliy Kulikov | 5b917a1 | 2010-10-17 18:41:24 +0400 | [diff] [blame] | 4101 | memset(&new_line, 0, size); |
| 4102 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4103 | switch(ifr->ifr_settings.type) { |
| 4104 | case IF_GET_IFACE: /* return current sync_serial_settings */ |
| 4105 | |
| 4106 | ifr->ifr_settings.type = IF_IFACE_SYNC_SERIAL; |
| 4107 | if (ifr->ifr_settings.size < size) { |
| 4108 | ifr->ifr_settings.size = size; /* data size wanted */ |
| 4109 | return -ENOBUFS; |
| 4110 | } |
| 4111 | |
| 4112 | flags = info->params.flags & (HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_RXC_DPLL | |
| 4113 | HDLC_FLAG_RXC_BRG | HDLC_FLAG_RXC_TXCPIN | |
| 4114 | HDLC_FLAG_TXC_TXCPIN | HDLC_FLAG_TXC_DPLL | |
| 4115 | HDLC_FLAG_TXC_BRG | HDLC_FLAG_TXC_RXCPIN); |
| 4116 | |
| 4117 | switch (flags){ |
| 4118 | case (HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_TXC_TXCPIN): new_line.clock_type = CLOCK_EXT; break; |
| 4119 | case (HDLC_FLAG_RXC_BRG | HDLC_FLAG_TXC_BRG): new_line.clock_type = CLOCK_INT; break; |
| 4120 | case (HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_TXC_BRG): new_line.clock_type = CLOCK_TXINT; break; |
| 4121 | case (HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_TXC_RXCPIN): new_line.clock_type = CLOCK_TXFROMRX; break; |
| 4122 | default: new_line.clock_type = CLOCK_DEFAULT; |
| 4123 | } |
| 4124 | |
| 4125 | new_line.clock_rate = info->params.clock_speed; |
| 4126 | new_line.loopback = info->params.loopback ? 1:0; |
| 4127 | |
| 4128 | if (copy_to_user(line, &new_line, size)) |
| 4129 | return -EFAULT; |
| 4130 | return 0; |
| 4131 | |
| 4132 | case IF_IFACE_SYNC_SERIAL: /* set sync_serial_settings */ |
| 4133 | |
| 4134 | if(!capable(CAP_NET_ADMIN)) |
| 4135 | return -EPERM; |
| 4136 | if (copy_from_user(&new_line, line, size)) |
| 4137 | return -EFAULT; |
| 4138 | |
| 4139 | switch (new_line.clock_type) |
| 4140 | { |
| 4141 | case CLOCK_EXT: flags = HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_TXC_TXCPIN; break; |
| 4142 | case CLOCK_TXFROMRX: flags = HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_TXC_RXCPIN; break; |
| 4143 | case CLOCK_INT: flags = HDLC_FLAG_RXC_BRG | HDLC_FLAG_TXC_BRG; break; |
| 4144 | case CLOCK_TXINT: flags = HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_TXC_BRG; break; |
| 4145 | case CLOCK_DEFAULT: flags = info->params.flags & |
| 4146 | (HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_RXC_DPLL | |
| 4147 | HDLC_FLAG_RXC_BRG | HDLC_FLAG_RXC_TXCPIN | |
| 4148 | HDLC_FLAG_TXC_TXCPIN | HDLC_FLAG_TXC_DPLL | |
| 4149 | HDLC_FLAG_TXC_BRG | HDLC_FLAG_TXC_RXCPIN); break; |
| 4150 | default: return -EINVAL; |
| 4151 | } |
| 4152 | |
| 4153 | if (new_line.loopback != 0 && new_line.loopback != 1) |
| 4154 | return -EINVAL; |
| 4155 | |
| 4156 | info->params.flags &= ~(HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_RXC_DPLL | |
| 4157 | HDLC_FLAG_RXC_BRG | HDLC_FLAG_RXC_TXCPIN | |
| 4158 | HDLC_FLAG_TXC_TXCPIN | HDLC_FLAG_TXC_DPLL | |
| 4159 | HDLC_FLAG_TXC_BRG | HDLC_FLAG_TXC_RXCPIN); |
| 4160 | info->params.flags |= flags; |
| 4161 | |
| 4162 | info->params.loopback = new_line.loopback; |
| 4163 | |
| 4164 | if (flags & (HDLC_FLAG_RXC_BRG | HDLC_FLAG_TXC_BRG)) |
| 4165 | info->params.clock_speed = new_line.clock_rate; |
| 4166 | else |
| 4167 | info->params.clock_speed = 0; |
| 4168 | |
| 4169 | /* if network interface up, reprogram hardware */ |
Alan Cox | eeb4613 | 2009-01-02 13:48:47 +0000 | [diff] [blame] | 4170 | if (info->netcount) { |
| 4171 | struct tty_struct *tty = tty_port_tty_get(&info->port); |
| 4172 | mgslpc_program_hw(info, tty); |
| 4173 | tty_kref_put(tty); |
| 4174 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4175 | return 0; |
| 4176 | |
| 4177 | default: |
| 4178 | return hdlc_ioctl(dev, ifr, cmd); |
| 4179 | } |
| 4180 | } |
| 4181 | |
| 4182 | /** |
| 4183 | * called by network layer when transmit timeout is detected |
| 4184 | * |
| 4185 | * dev pointer to network device structure |
| 4186 | */ |
| 4187 | static void hdlcdev_tx_timeout(struct net_device *dev) |
| 4188 | { |
| 4189 | MGSLPC_INFO *info = dev_to_port(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4190 | unsigned long flags; |
| 4191 | |
| 4192 | if (debug_level >= DEBUG_LEVEL_INFO) |
| 4193 | printk("hdlcdev_tx_timeout(%s)\n",dev->name); |
| 4194 | |
Krzysztof Halasa | 198191c | 2008-06-30 23:26:53 +0200 | [diff] [blame] | 4195 | dev->stats.tx_errors++; |
| 4196 | dev->stats.tx_aborted_errors++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4197 | |
| 4198 | spin_lock_irqsave(&info->lock,flags); |
| 4199 | tx_stop(info); |
| 4200 | spin_unlock_irqrestore(&info->lock,flags); |
| 4201 | |
| 4202 | netif_wake_queue(dev); |
| 4203 | } |
| 4204 | |
| 4205 | /** |
| 4206 | * called by device driver when transmit completes |
| 4207 | * reenable network layer transmit if stopped |
| 4208 | * |
| 4209 | * info pointer to device instance information |
| 4210 | */ |
| 4211 | static void hdlcdev_tx_done(MGSLPC_INFO *info) |
| 4212 | { |
| 4213 | if (netif_queue_stopped(info->netdev)) |
| 4214 | netif_wake_queue(info->netdev); |
| 4215 | } |
| 4216 | |
| 4217 | /** |
| 4218 | * called by device driver when frame received |
| 4219 | * pass frame to network layer |
| 4220 | * |
| 4221 | * info pointer to device instance information |
| 4222 | * buf pointer to buffer contianing frame data |
| 4223 | * size count of data bytes in buf |
| 4224 | */ |
| 4225 | static void hdlcdev_rx(MGSLPC_INFO *info, char *buf, int size) |
| 4226 | { |
| 4227 | struct sk_buff *skb = dev_alloc_skb(size); |
| 4228 | struct net_device *dev = info->netdev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4229 | |
| 4230 | if (debug_level >= DEBUG_LEVEL_INFO) |
| 4231 | printk("hdlcdev_rx(%s)\n",dev->name); |
| 4232 | |
| 4233 | if (skb == NULL) { |
| 4234 | 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] | 4235 | dev->stats.rx_dropped++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4236 | return; |
| 4237 | } |
| 4238 | |
Krzysztof Halasa | 198191c | 2008-06-30 23:26:53 +0200 | [diff] [blame] | 4239 | memcpy(skb_put(skb, size), buf, size); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4240 | |
Krzysztof Halasa | 198191c | 2008-06-30 23:26:53 +0200 | [diff] [blame] | 4241 | skb->protocol = hdlc_type_trans(skb, dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4242 | |
Krzysztof Halasa | 198191c | 2008-06-30 23:26:53 +0200 | [diff] [blame] | 4243 | dev->stats.rx_packets++; |
| 4244 | dev->stats.rx_bytes += size; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4245 | |
| 4246 | netif_rx(skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4247 | } |
| 4248 | |
Krzysztof Hałasa | 991990a | 2009-01-08 22:52:11 +0100 | [diff] [blame] | 4249 | static const struct net_device_ops hdlcdev_ops = { |
| 4250 | .ndo_open = hdlcdev_open, |
| 4251 | .ndo_stop = hdlcdev_close, |
| 4252 | .ndo_change_mtu = hdlc_change_mtu, |
| 4253 | .ndo_start_xmit = hdlc_start_xmit, |
| 4254 | .ndo_do_ioctl = hdlcdev_ioctl, |
| 4255 | .ndo_tx_timeout = hdlcdev_tx_timeout, |
| 4256 | }; |
| 4257 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4258 | /** |
| 4259 | * called by device driver when adding device instance |
| 4260 | * do generic HDLC initialization |
| 4261 | * |
| 4262 | * info pointer to device instance information |
| 4263 | * |
| 4264 | * returns 0 if success, otherwise error code |
| 4265 | */ |
| 4266 | static int hdlcdev_init(MGSLPC_INFO *info) |
| 4267 | { |
| 4268 | int rc; |
| 4269 | struct net_device *dev; |
| 4270 | hdlc_device *hdlc; |
| 4271 | |
| 4272 | /* allocate and initialize network and HDLC layer objects */ |
| 4273 | |
| 4274 | if (!(dev = alloc_hdlcdev(info))) { |
| 4275 | printk(KERN_ERR "%s:hdlc device allocation failure\n",__FILE__); |
| 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 */ |
| 4294 | if ((rc = register_hdlc_device(dev))) { |
| 4295 | printk(KERN_WARNING "%s:unable to register hdlc device\n",__FILE__); |
| 4296 | free_netdev(dev); |
| 4297 | return rc; |
| 4298 | } |
| 4299 | |
| 4300 | info->netdev = dev; |
| 4301 | return 0; |
| 4302 | } |
| 4303 | |
| 4304 | /** |
| 4305 | * called by device driver when removing device instance |
| 4306 | * do generic HDLC cleanup |
| 4307 | * |
| 4308 | * info pointer to device instance information |
| 4309 | */ |
| 4310 | static void hdlcdev_exit(MGSLPC_INFO *info) |
| 4311 | { |
| 4312 | unregister_hdlc_device(info->netdev); |
| 4313 | free_netdev(info->netdev); |
| 4314 | info->netdev = NULL; |
| 4315 | } |
| 4316 | |
| 4317 | #endif /* CONFIG_HDLC */ |
| 4318 | |