Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 1 | /* |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 2 | * Device driver for Microgate SyncLink GT serial adapters. |
| 3 | * |
| 4 | * written by Paul Fulghum for Microgate Corporation |
| 5 | * paulkf@microgate.com |
| 6 | * |
| 7 | * Microgate and SyncLink are trademarks of Microgate Corporation |
| 8 | * |
| 9 | * This code is released under the GNU General Public License (GPL) |
| 10 | * |
| 11 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED |
| 12 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| 13 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
| 14 | * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, |
| 15 | * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES |
| 16 | * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR |
| 17 | * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 18 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, |
| 19 | * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| 20 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED |
| 21 | * OF THE POSSIBILITY OF SUCH DAMAGE. |
| 22 | */ |
| 23 | |
| 24 | /* |
| 25 | * DEBUG OUTPUT DEFINITIONS |
| 26 | * |
| 27 | * uncomment lines below to enable specific types of debug output |
| 28 | * |
| 29 | * DBGINFO information - most verbose output |
| 30 | * DBGERR serious errors |
| 31 | * DBGBH bottom half service routine debugging |
| 32 | * DBGISR interrupt service routine debugging |
| 33 | * DBGDATA output receive and transmit data |
| 34 | * DBGTBUF output transmit DMA buffers and registers |
| 35 | * DBGRBUF output receive DMA buffers and registers |
| 36 | */ |
| 37 | |
| 38 | #define DBGINFO(fmt) if (debug_level >= DEBUG_LEVEL_INFO) printk fmt |
| 39 | #define DBGERR(fmt) if (debug_level >= DEBUG_LEVEL_ERROR) printk fmt |
| 40 | #define DBGBH(fmt) if (debug_level >= DEBUG_LEVEL_BH) printk fmt |
| 41 | #define DBGISR(fmt) if (debug_level >= DEBUG_LEVEL_ISR) printk fmt |
| 42 | #define DBGDATA(info, buf, size, label) if (debug_level >= DEBUG_LEVEL_DATA) trace_block((info), (buf), (size), (label)) |
Alan Cox | f602501 | 2010-06-01 22:52:46 +0200 | [diff] [blame] | 43 | /*#define DBGTBUF(info) dump_tbufs(info)*/ |
| 44 | /*#define DBGRBUF(info) dump_rbufs(info)*/ |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 45 | |
| 46 | |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 47 | #include <linux/module.h> |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 48 | #include <linux/errno.h> |
| 49 | #include <linux/signal.h> |
| 50 | #include <linux/sched.h> |
| 51 | #include <linux/timer.h> |
| 52 | #include <linux/interrupt.h> |
| 53 | #include <linux/pci.h> |
| 54 | #include <linux/tty.h> |
| 55 | #include <linux/tty_flip.h> |
| 56 | #include <linux/serial.h> |
| 57 | #include <linux/major.h> |
| 58 | #include <linux/string.h> |
| 59 | #include <linux/fcntl.h> |
| 60 | #include <linux/ptrace.h> |
| 61 | #include <linux/ioport.h> |
| 62 | #include <linux/mm.h> |
Alexey Dobriyan | a18c56e | 2009-03-31 15:19:19 -0700 | [diff] [blame] | 63 | #include <linux/seq_file.h> |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 64 | #include <linux/slab.h> |
| 65 | #include <linux/netdevice.h> |
| 66 | #include <linux/vmalloc.h> |
| 67 | #include <linux/init.h> |
| 68 | #include <linux/delay.h> |
| 69 | #include <linux/ioctl.h> |
| 70 | #include <linux/termios.h> |
| 71 | #include <linux/bitops.h> |
| 72 | #include <linux/workqueue.h> |
| 73 | #include <linux/hdlc.h> |
Robert P. J. Day | 3dd1247 | 2008-02-06 01:37:17 -0800 | [diff] [blame] | 74 | #include <linux/synclink.h> |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 75 | |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 76 | #include <asm/io.h> |
| 77 | #include <asm/irq.h> |
| 78 | #include <asm/dma.h> |
| 79 | #include <asm/types.h> |
| 80 | #include <asm/uaccess.h> |
| 81 | |
Paul Fulghum | af69c7f | 2006-12-06 20:40:24 -0800 | [diff] [blame] | 82 | #if defined(CONFIG_HDLC) || (defined(CONFIG_HDLC_MODULE) && defined(CONFIG_SYNCLINK_GT_MODULE)) |
| 83 | #define SYNCLINK_GENERIC_HDLC 1 |
| 84 | #else |
| 85 | #define SYNCLINK_GENERIC_HDLC 0 |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 86 | #endif |
| 87 | |
| 88 | /* |
| 89 | * module identification |
| 90 | */ |
| 91 | static char *driver_name = "SyncLink GT"; |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 92 | static char *tty_driver_name = "synclink_gt"; |
| 93 | static char *tty_dev_prefix = "ttySLG"; |
| 94 | MODULE_LICENSE("GPL"); |
| 95 | #define MGSL_MAGIC 0x5401 |
Paul Fulghum | a077c1a | 2006-09-30 23:27:46 -0700 | [diff] [blame] | 96 | #define MAX_DEVICES 32 |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 97 | |
| 98 | static struct pci_device_id pci_table[] = { |
| 99 | {PCI_VENDOR_ID_MICROGATE, SYNCLINK_GT_DEVICE_ID, PCI_ANY_ID, PCI_ANY_ID,}, |
Paul Fulghum | 6f84be8 | 2006-06-25 05:49:22 -0700 | [diff] [blame] | 100 | {PCI_VENDOR_ID_MICROGATE, SYNCLINK_GT2_DEVICE_ID, PCI_ANY_ID, PCI_ANY_ID,}, |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 101 | {PCI_VENDOR_ID_MICROGATE, SYNCLINK_GT4_DEVICE_ID, PCI_ANY_ID, PCI_ANY_ID,}, |
| 102 | {PCI_VENDOR_ID_MICROGATE, SYNCLINK_AC_DEVICE_ID, PCI_ANY_ID, PCI_ANY_ID,}, |
| 103 | {0,}, /* terminate list */ |
| 104 | }; |
| 105 | MODULE_DEVICE_TABLE(pci, pci_table); |
| 106 | |
| 107 | static int init_one(struct pci_dev *dev,const struct pci_device_id *ent); |
| 108 | static void remove_one(struct pci_dev *dev); |
| 109 | static struct pci_driver pci_driver = { |
| 110 | .name = "synclink_gt", |
| 111 | .id_table = pci_table, |
| 112 | .probe = init_one, |
Bill Pemberton | 91116cb | 2012-11-19 13:21:06 -0500 | [diff] [blame] | 113 | .remove = remove_one, |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 114 | }; |
| 115 | |
Joe Perches | 0fab6de | 2008-04-28 02:14:02 -0700 | [diff] [blame] | 116 | static bool pci_registered; |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 117 | |
| 118 | /* |
| 119 | * module configuration and status |
| 120 | */ |
| 121 | static struct slgt_info *slgt_device_list; |
| 122 | static int slgt_device_count; |
| 123 | |
| 124 | static int ttymajor; |
| 125 | static int debug_level; |
| 126 | static int maxframe[MAX_DEVICES]; |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 127 | |
| 128 | module_param(ttymajor, int, 0); |
| 129 | module_param(debug_level, int, 0); |
| 130 | module_param_array(maxframe, int, NULL, 0); |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 131 | |
| 132 | MODULE_PARM_DESC(ttymajor, "TTY major device number override: 0=auto assigned"); |
| 133 | MODULE_PARM_DESC(debug_level, "Debug syslog output: 0=disabled, 1 to 5=increasing detail"); |
| 134 | MODULE_PARM_DESC(maxframe, "Maximum frame size used by device (4096 to 65535)"); |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 135 | |
| 136 | /* |
| 137 | * tty support and callbacks |
| 138 | */ |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 139 | static struct tty_driver *serial_driver; |
| 140 | |
| 141 | static int open(struct tty_struct *tty, struct file * filp); |
| 142 | static void close(struct tty_struct *tty, struct file * filp); |
| 143 | static void hangup(struct tty_struct *tty); |
Alan Cox | 606d099 | 2006-12-08 02:38:45 -0800 | [diff] [blame] | 144 | static void set_termios(struct tty_struct *tty, struct ktermios *old_termios); |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 145 | |
| 146 | static int write(struct tty_struct *tty, const unsigned char *buf, int count); |
Alan Cox | 55da778 | 2008-04-30 00:54:07 -0700 | [diff] [blame] | 147 | static int put_char(struct tty_struct *tty, unsigned char ch); |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 148 | static void send_xchar(struct tty_struct *tty, char ch); |
| 149 | static void wait_until_sent(struct tty_struct *tty, int timeout); |
| 150 | static int write_room(struct tty_struct *tty); |
| 151 | static void flush_chars(struct tty_struct *tty); |
| 152 | static void flush_buffer(struct tty_struct *tty); |
| 153 | static void tx_hold(struct tty_struct *tty); |
| 154 | static void tx_release(struct tty_struct *tty); |
| 155 | |
Alan Cox | 6caa76b | 2011-02-14 16:27:22 +0000 | [diff] [blame] | 156 | static int ioctl(struct tty_struct *tty, unsigned int cmd, unsigned long arg); |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 157 | static int chars_in_buffer(struct tty_struct *tty); |
| 158 | static void throttle(struct tty_struct * tty); |
| 159 | static void unthrottle(struct tty_struct * tty); |
Alan Cox | 9e98966 | 2008-07-22 11:18:03 +0100 | [diff] [blame] | 160 | static int set_break(struct tty_struct *tty, int break_state); |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 161 | |
| 162 | /* |
| 163 | * generic HDLC support and callbacks |
| 164 | */ |
Paul Fulghum | af69c7f | 2006-12-06 20:40:24 -0800 | [diff] [blame] | 165 | #if SYNCLINK_GENERIC_HDLC |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 166 | #define dev_to_port(D) (dev_to_hdlc(D)->priv) |
| 167 | static void hdlcdev_tx_done(struct slgt_info *info); |
| 168 | static void hdlcdev_rx(struct slgt_info *info, char *buf, int size); |
| 169 | static int hdlcdev_init(struct slgt_info *info); |
| 170 | static void hdlcdev_exit(struct slgt_info *info); |
| 171 | #endif |
| 172 | |
| 173 | |
| 174 | /* |
| 175 | * device specific structures, macros and functions |
| 176 | */ |
| 177 | |
| 178 | #define SLGT_MAX_PORTS 4 |
| 179 | #define SLGT_REG_SIZE 256 |
| 180 | |
| 181 | /* |
Paul Fulghum | 0080b7a | 2006-03-28 01:56:15 -0800 | [diff] [blame] | 182 | * conditional wait facility |
| 183 | */ |
| 184 | struct cond_wait { |
| 185 | struct cond_wait *next; |
| 186 | wait_queue_head_t q; |
| 187 | wait_queue_t wait; |
| 188 | unsigned int data; |
| 189 | }; |
| 190 | static void init_cond_wait(struct cond_wait *w, unsigned int data); |
| 191 | static void add_cond_wait(struct cond_wait **head, struct cond_wait *w); |
| 192 | static void remove_cond_wait(struct cond_wait **head, struct cond_wait *w); |
| 193 | static void flush_cond_wait(struct cond_wait **head); |
| 194 | |
| 195 | /* |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 196 | * DMA buffer descriptor and access macros |
| 197 | */ |
| 198 | struct slgt_desc |
| 199 | { |
Al Viro | 51ef9c5 | 2007-10-14 19:34:30 +0100 | [diff] [blame] | 200 | __le16 count; |
| 201 | __le16 status; |
| 202 | __le32 pbuf; /* physical address of data buffer */ |
| 203 | __le32 next; /* physical address of next descriptor */ |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 204 | |
| 205 | /* driver book keeping */ |
| 206 | char *buf; /* virtual address of data buffer */ |
| 207 | unsigned int pdesc; /* physical address of this descriptor */ |
| 208 | dma_addr_t buf_dma_addr; |
Paul Fulghum | 403214d | 2008-07-22 11:21:55 +0100 | [diff] [blame] | 209 | unsigned short buf_count; |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 210 | }; |
| 211 | |
| 212 | #define set_desc_buffer(a,b) (a).pbuf = cpu_to_le32((unsigned int)(b)) |
| 213 | #define set_desc_next(a,b) (a).next = cpu_to_le32((unsigned int)(b)) |
| 214 | #define set_desc_count(a,b)(a).count = cpu_to_le16((unsigned short)(b)) |
| 215 | #define set_desc_eof(a,b) (a).status = cpu_to_le16((b) ? (le16_to_cpu((a).status) | BIT0) : (le16_to_cpu((a).status) & ~BIT0)) |
Paul Fulghum | 5ba5a5d | 2009-06-11 12:28:37 +0100 | [diff] [blame] | 216 | #define set_desc_status(a, b) (a).status = cpu_to_le16((unsigned short)(b)) |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 217 | #define desc_count(a) (le16_to_cpu((a).count)) |
| 218 | #define desc_status(a) (le16_to_cpu((a).status)) |
| 219 | #define desc_complete(a) (le16_to_cpu((a).status) & BIT15) |
| 220 | #define desc_eof(a) (le16_to_cpu((a).status) & BIT2) |
| 221 | #define desc_crc_error(a) (le16_to_cpu((a).status) & BIT1) |
| 222 | #define desc_abort(a) (le16_to_cpu((a).status) & BIT0) |
| 223 | #define desc_residue(a) ((le16_to_cpu((a).status) & 0x38) >> 3) |
| 224 | |
| 225 | struct _input_signal_events { |
| 226 | int ri_up; |
| 227 | int ri_down; |
| 228 | int dsr_up; |
| 229 | int dsr_down; |
| 230 | int dcd_up; |
| 231 | int dcd_down; |
| 232 | int cts_up; |
| 233 | int cts_down; |
| 234 | }; |
| 235 | |
| 236 | /* |
| 237 | * device instance data structure |
| 238 | */ |
| 239 | struct slgt_info { |
| 240 | void *if_ptr; /* General purpose pointer (used by SPPP) */ |
Alan Cox | 8fb06c7 | 2008-07-16 21:56:46 +0100 | [diff] [blame] | 241 | struct tty_port port; |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 242 | |
| 243 | struct slgt_info *next_device; /* device list link */ |
| 244 | |
| 245 | int magic; |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 246 | |
| 247 | char device_name[25]; |
| 248 | struct pci_dev *pdev; |
| 249 | |
| 250 | int port_count; /* count of ports on adapter */ |
| 251 | int adapter_num; /* adapter instance number */ |
| 252 | int port_num; /* port instance number */ |
| 253 | |
| 254 | /* array of pointers to port contexts on this adapter */ |
| 255 | struct slgt_info *port_array[SLGT_MAX_PORTS]; |
| 256 | |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 257 | int line; /* tty line instance number */ |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 258 | |
| 259 | struct mgsl_icount icount; |
| 260 | |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 261 | int timeout; |
| 262 | int x_char; /* xon/xoff character */ |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 263 | unsigned int read_status_mask; |
| 264 | unsigned int ignore_status_mask; |
| 265 | |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 266 | wait_queue_head_t status_event_wait_q; |
| 267 | wait_queue_head_t event_wait_q; |
| 268 | struct timer_list tx_timer; |
| 269 | struct timer_list rx_timer; |
| 270 | |
Paul Fulghum | 0080b7a | 2006-03-28 01:56:15 -0800 | [diff] [blame] | 271 | unsigned int gpio_present; |
| 272 | struct cond_wait *gpio_wait_q; |
| 273 | |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 274 | spinlock_t lock; /* spinlock for synchronizing with ISR */ |
| 275 | |
| 276 | struct work_struct task; |
| 277 | u32 pending_bh; |
Joe Perches | 0fab6de | 2008-04-28 02:14:02 -0700 | [diff] [blame] | 278 | bool bh_requested; |
| 279 | bool bh_running; |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 280 | |
| 281 | int isr_overflow; |
Joe Perches | 0fab6de | 2008-04-28 02:14:02 -0700 | [diff] [blame] | 282 | bool irq_requested; /* true if IRQ requested */ |
| 283 | bool irq_occurred; /* for diagnostics use */ |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 284 | |
| 285 | /* device configuration */ |
| 286 | |
| 287 | unsigned int bus_type; |
| 288 | unsigned int irq_level; |
| 289 | unsigned long irq_flags; |
| 290 | |
| 291 | unsigned char __iomem * reg_addr; /* memory mapped registers address */ |
| 292 | u32 phys_reg_addr; |
Joe Perches | 0fab6de | 2008-04-28 02:14:02 -0700 | [diff] [blame] | 293 | bool reg_addr_requested; |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 294 | |
| 295 | MGSL_PARAMS params; /* communications parameters */ |
| 296 | u32 idle_mode; |
| 297 | u32 max_frame_size; /* as set by device config */ |
| 298 | |
Paul Fulghum | 814dae0 | 2008-07-22 11:22:14 +0100 | [diff] [blame] | 299 | unsigned int rbuf_fill_level; |
Paul Fulghum | 5ba5a5d | 2009-06-11 12:28:37 +0100 | [diff] [blame] | 300 | unsigned int rx_pio; |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 301 | unsigned int if_mode; |
Paul Fulghum | 1f80769 | 2009-04-02 16:58:30 -0700 | [diff] [blame] | 302 | unsigned int base_clock; |
Paul Fulghum | 9807224 | 2010-10-27 15:34:22 -0700 | [diff] [blame] | 303 | unsigned int xsync; |
| 304 | unsigned int xctrl; |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 305 | |
| 306 | /* device status */ |
| 307 | |
Joe Perches | 0fab6de | 2008-04-28 02:14:02 -0700 | [diff] [blame] | 308 | bool rx_enabled; |
| 309 | bool rx_restart; |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 310 | |
Joe Perches | 0fab6de | 2008-04-28 02:14:02 -0700 | [diff] [blame] | 311 | bool tx_enabled; |
| 312 | bool tx_active; |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 313 | |
| 314 | unsigned char signals; /* serial signal states */ |
Darren Jenkins | 2641dfd | 2006-02-28 16:59:20 -0800 | [diff] [blame] | 315 | int init_error; /* initialization error */ |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 316 | |
| 317 | unsigned char *tx_buf; |
| 318 | int tx_count; |
| 319 | |
| 320 | char flag_buf[MAX_ASYNC_BUFFER_SIZE]; |
| 321 | char char_buf[MAX_ASYNC_BUFFER_SIZE]; |
Joe Perches | 0fab6de | 2008-04-28 02:14:02 -0700 | [diff] [blame] | 322 | bool drop_rts_on_tx_done; |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 323 | struct _input_signal_events input_signal_events; |
| 324 | |
| 325 | int dcd_chkcount; /* check counts to prevent */ |
| 326 | int cts_chkcount; /* too many IRQs if a signal */ |
| 327 | int dsr_chkcount; /* is floating */ |
| 328 | int ri_chkcount; |
| 329 | |
| 330 | char *bufs; /* virtual address of DMA buffer lists */ |
| 331 | dma_addr_t bufs_dma_addr; /* physical address of buffer descriptors */ |
| 332 | |
| 333 | unsigned int rbuf_count; |
| 334 | struct slgt_desc *rbufs; |
| 335 | unsigned int rbuf_current; |
| 336 | unsigned int rbuf_index; |
Paul Fulghum | 5ba5a5d | 2009-06-11 12:28:37 +0100 | [diff] [blame] | 337 | unsigned int rbuf_fill_index; |
| 338 | unsigned short rbuf_fill_count; |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 339 | |
| 340 | unsigned int tbuf_count; |
| 341 | struct slgt_desc *tbufs; |
| 342 | unsigned int tbuf_current; |
| 343 | unsigned int tbuf_start; |
| 344 | |
| 345 | unsigned char *tmp_rbuf; |
| 346 | unsigned int tmp_rbuf_count; |
| 347 | |
| 348 | /* SPPP/Cisco HDLC device parts */ |
| 349 | |
| 350 | int netcount; |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 351 | spinlock_t netlock; |
Paul Fulghum | af69c7f | 2006-12-06 20:40:24 -0800 | [diff] [blame] | 352 | #if SYNCLINK_GENERIC_HDLC |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 353 | struct net_device *netdev; |
| 354 | #endif |
| 355 | |
| 356 | }; |
| 357 | |
| 358 | static MGSL_PARAMS default_params = { |
| 359 | .mode = MGSL_MODE_HDLC, |
| 360 | .loopback = 0, |
| 361 | .flags = HDLC_FLAG_UNDERRUN_ABORT15, |
| 362 | .encoding = HDLC_ENCODING_NRZI_SPACE, |
| 363 | .clock_speed = 0, |
| 364 | .addr_filter = 0xff, |
| 365 | .crc_type = HDLC_CRC_16_CCITT, |
| 366 | .preamble_length = HDLC_PREAMBLE_LENGTH_8BITS, |
| 367 | .preamble = HDLC_PREAMBLE_PATTERN_NONE, |
| 368 | .data_rate = 9600, |
| 369 | .data_bits = 8, |
| 370 | .stop_bits = 1, |
| 371 | .parity = ASYNC_PARITY_NONE |
| 372 | }; |
| 373 | |
| 374 | |
| 375 | #define BH_RECEIVE 1 |
| 376 | #define BH_TRANSMIT 2 |
| 377 | #define BH_STATUS 4 |
| 378 | #define IO_PIN_SHUTDOWN_LIMIT 100 |
| 379 | |
| 380 | #define DMABUFSIZE 256 |
| 381 | #define DESC_LIST_SIZE 4096 |
| 382 | |
| 383 | #define MASK_PARITY BIT1 |
Paul Fulghum | 202af6d | 2006-08-31 21:27:36 -0700 | [diff] [blame] | 384 | #define MASK_FRAMING BIT0 |
| 385 | #define MASK_BREAK BIT14 |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 386 | #define MASK_OVERRUN BIT4 |
| 387 | |
| 388 | #define GSR 0x00 /* global status */ |
Paul Fulghum | 0080b7a | 2006-03-28 01:56:15 -0800 | [diff] [blame] | 389 | #define JCR 0x04 /* JTAG control */ |
| 390 | #define IODR 0x08 /* GPIO direction */ |
| 391 | #define IOER 0x0c /* GPIO interrupt enable */ |
| 392 | #define IOVR 0x10 /* GPIO value */ |
| 393 | #define IOSR 0x14 /* GPIO interrupt status */ |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 394 | #define TDR 0x80 /* tx data */ |
| 395 | #define RDR 0x80 /* rx data */ |
| 396 | #define TCR 0x82 /* tx control */ |
| 397 | #define TIR 0x84 /* tx idle */ |
| 398 | #define TPR 0x85 /* tx preamble */ |
| 399 | #define RCR 0x86 /* rx control */ |
| 400 | #define VCR 0x88 /* V.24 control */ |
| 401 | #define CCR 0x89 /* clock control */ |
| 402 | #define BDR 0x8a /* baud divisor */ |
| 403 | #define SCR 0x8c /* serial control */ |
| 404 | #define SSR 0x8e /* serial status */ |
| 405 | #define RDCSR 0x90 /* rx DMA control/status */ |
| 406 | #define TDCSR 0x94 /* tx DMA control/status */ |
| 407 | #define RDDAR 0x98 /* rx DMA descriptor address */ |
| 408 | #define TDDAR 0x9c /* tx DMA descriptor address */ |
Paul Fulghum | 9807224 | 2010-10-27 15:34:22 -0700 | [diff] [blame] | 409 | #define XSR 0x40 /* extended sync pattern */ |
| 410 | #define XCR 0x44 /* extended control */ |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 411 | |
| 412 | #define RXIDLE BIT14 |
| 413 | #define RXBREAK BIT14 |
| 414 | #define IRQ_TXDATA BIT13 |
| 415 | #define IRQ_TXIDLE BIT12 |
| 416 | #define IRQ_TXUNDER BIT11 /* HDLC */ |
| 417 | #define IRQ_RXDATA BIT10 |
| 418 | #define IRQ_RXIDLE BIT9 /* HDLC */ |
| 419 | #define IRQ_RXBREAK BIT9 /* async */ |
| 420 | #define IRQ_RXOVER BIT8 |
| 421 | #define IRQ_DSR BIT7 |
| 422 | #define IRQ_CTS BIT6 |
| 423 | #define IRQ_DCD BIT5 |
| 424 | #define IRQ_RI BIT4 |
| 425 | #define IRQ_ALL 0x3ff0 |
| 426 | #define IRQ_MASTER BIT0 |
| 427 | |
| 428 | #define slgt_irq_on(info, mask) \ |
| 429 | wr_reg16((info), SCR, (unsigned short)(rd_reg16((info), SCR) | (mask))) |
| 430 | #define slgt_irq_off(info, mask) \ |
| 431 | wr_reg16((info), SCR, (unsigned short)(rd_reg16((info), SCR) & ~(mask))) |
| 432 | |
| 433 | static __u8 rd_reg8(struct slgt_info *info, unsigned int addr); |
| 434 | static void wr_reg8(struct slgt_info *info, unsigned int addr, __u8 value); |
| 435 | static __u16 rd_reg16(struct slgt_info *info, unsigned int addr); |
| 436 | static void wr_reg16(struct slgt_info *info, unsigned int addr, __u16 value); |
| 437 | static __u32 rd_reg32(struct slgt_info *info, unsigned int addr); |
| 438 | static void wr_reg32(struct slgt_info *info, unsigned int addr, __u32 value); |
| 439 | |
| 440 | static void msc_set_vcr(struct slgt_info *info); |
| 441 | |
| 442 | static int startup(struct slgt_info *info); |
| 443 | static int block_til_ready(struct tty_struct *tty, struct file * filp,struct slgt_info *info); |
| 444 | static void shutdown(struct slgt_info *info); |
| 445 | static void program_hw(struct slgt_info *info); |
| 446 | static void change_params(struct slgt_info *info); |
| 447 | |
| 448 | static int register_test(struct slgt_info *info); |
| 449 | static int irq_test(struct slgt_info *info); |
| 450 | static int loopback_test(struct slgt_info *info); |
| 451 | static int adapter_test(struct slgt_info *info); |
| 452 | |
| 453 | static void reset_adapter(struct slgt_info *info); |
| 454 | static void reset_port(struct slgt_info *info); |
| 455 | static void async_mode(struct slgt_info *info); |
Paul Fulghum | cb10dc9 | 2006-09-30 23:27:45 -0700 | [diff] [blame] | 456 | static void sync_mode(struct slgt_info *info); |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 457 | |
| 458 | static void rx_stop(struct slgt_info *info); |
| 459 | static void rx_start(struct slgt_info *info); |
| 460 | static void reset_rbufs(struct slgt_info *info); |
| 461 | static void free_rbufs(struct slgt_info *info, unsigned int first, unsigned int last); |
| 462 | static void rdma_reset(struct slgt_info *info); |
Joe Perches | 0fab6de | 2008-04-28 02:14:02 -0700 | [diff] [blame] | 463 | static bool rx_get_frame(struct slgt_info *info); |
| 464 | static bool rx_get_buf(struct slgt_info *info); |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 465 | |
| 466 | static void tx_start(struct slgt_info *info); |
| 467 | static void tx_stop(struct slgt_info *info); |
| 468 | static void tx_set_idle(struct slgt_info *info); |
| 469 | static unsigned int free_tbuf_count(struct slgt_info *info); |
Paul Fulghum | 403214d | 2008-07-22 11:21:55 +0100 | [diff] [blame] | 470 | static unsigned int tbuf_bytes(struct slgt_info *info); |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 471 | static void reset_tbufs(struct slgt_info *info); |
| 472 | static void tdma_reset(struct slgt_info *info); |
Paul Fulghum | de538eb | 2009-12-09 12:31:39 -0800 | [diff] [blame] | 473 | static bool tx_load(struct slgt_info *info, const char *buf, unsigned int count); |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 474 | |
| 475 | static void get_signals(struct slgt_info *info); |
| 476 | static void set_signals(struct slgt_info *info); |
| 477 | static void enable_loopback(struct slgt_info *info); |
| 478 | static void set_rate(struct slgt_info *info, u32 data_rate); |
| 479 | |
| 480 | static int bh_action(struct slgt_info *info); |
David Howells | c402895 | 2006-11-22 14:57:56 +0000 | [diff] [blame] | 481 | static void bh_handler(struct work_struct *work); |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 482 | static void bh_transmit(struct slgt_info *info); |
| 483 | static void isr_serial(struct slgt_info *info); |
| 484 | static void isr_rdma(struct slgt_info *info); |
| 485 | static void isr_txeom(struct slgt_info *info, unsigned short status); |
| 486 | static void isr_tdma(struct slgt_info *info); |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 487 | |
| 488 | static int alloc_dma_bufs(struct slgt_info *info); |
| 489 | static void free_dma_bufs(struct slgt_info *info); |
| 490 | static int alloc_desc(struct slgt_info *info); |
| 491 | static void free_desc(struct slgt_info *info); |
| 492 | static int alloc_bufs(struct slgt_info *info, struct slgt_desc *bufs, int count); |
| 493 | static void free_bufs(struct slgt_info *info, struct slgt_desc *bufs, int count); |
| 494 | |
| 495 | static int alloc_tmp_rbuf(struct slgt_info *info); |
| 496 | static void free_tmp_rbuf(struct slgt_info *info); |
| 497 | |
| 498 | static void tx_timeout(unsigned long context); |
| 499 | static void rx_timeout(unsigned long context); |
| 500 | |
| 501 | /* |
| 502 | * ioctl handlers |
| 503 | */ |
| 504 | static int get_stats(struct slgt_info *info, struct mgsl_icount __user *user_icount); |
| 505 | static int get_params(struct slgt_info *info, MGSL_PARAMS __user *params); |
| 506 | static int set_params(struct slgt_info *info, MGSL_PARAMS __user *params); |
| 507 | static int get_txidle(struct slgt_info *info, int __user *idle_mode); |
| 508 | static int set_txidle(struct slgt_info *info, int idle_mode); |
| 509 | static int tx_enable(struct slgt_info *info, int enable); |
| 510 | static int tx_abort(struct slgt_info *info); |
| 511 | static int rx_enable(struct slgt_info *info, int enable); |
| 512 | static int modem_input_wait(struct slgt_info *info,int arg); |
| 513 | static int wait_mgsl_event(struct slgt_info *info, int __user *mask_ptr); |
Alan Cox | 60b33c1 | 2011-02-14 16:26:14 +0000 | [diff] [blame] | 514 | static int tiocmget(struct tty_struct *tty); |
Alan Cox | 20b9d17 | 2011-02-14 16:26:50 +0000 | [diff] [blame] | 515 | static int tiocmset(struct tty_struct *tty, |
| 516 | unsigned int set, unsigned int clear); |
Alan Cox | 9e98966 | 2008-07-22 11:18:03 +0100 | [diff] [blame] | 517 | static int set_break(struct tty_struct *tty, int break_state); |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 518 | static int get_interface(struct slgt_info *info, int __user *if_mode); |
| 519 | static int set_interface(struct slgt_info *info, int if_mode); |
Paul Fulghum | 0080b7a | 2006-03-28 01:56:15 -0800 | [diff] [blame] | 520 | static int set_gpio(struct slgt_info *info, struct gpio_desc __user *gpio); |
| 521 | static int get_gpio(struct slgt_info *info, struct gpio_desc __user *gpio); |
| 522 | static int wait_gpio(struct slgt_info *info, struct gpio_desc __user *gpio); |
Paul Fulghum | 9807224 | 2010-10-27 15:34:22 -0700 | [diff] [blame] | 523 | static int get_xsync(struct slgt_info *info, int __user *if_mode); |
| 524 | static int set_xsync(struct slgt_info *info, int if_mode); |
| 525 | static int get_xctrl(struct slgt_info *info, int __user *if_mode); |
| 526 | static int set_xctrl(struct slgt_info *info, int if_mode); |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 527 | |
| 528 | /* |
| 529 | * driver functions |
| 530 | */ |
| 531 | static void add_device(struct slgt_info *info); |
| 532 | static void device_init(int adapter_num, struct pci_dev *pdev); |
| 533 | static int claim_resources(struct slgt_info *info); |
| 534 | static void release_resources(struct slgt_info *info); |
| 535 | |
| 536 | /* |
| 537 | * DEBUG OUTPUT CODE |
| 538 | */ |
| 539 | #ifndef DBGINFO |
| 540 | #define DBGINFO(fmt) |
| 541 | #endif |
| 542 | #ifndef DBGERR |
| 543 | #define DBGERR(fmt) |
| 544 | #endif |
| 545 | #ifndef DBGBH |
| 546 | #define DBGBH(fmt) |
| 547 | #endif |
| 548 | #ifndef DBGISR |
| 549 | #define DBGISR(fmt) |
| 550 | #endif |
| 551 | |
| 552 | #ifdef DBGDATA |
| 553 | static void trace_block(struct slgt_info *info, const char *data, int count, const char *label) |
| 554 | { |
| 555 | int i; |
| 556 | int linecount; |
| 557 | printk("%s %s data:\n",info->device_name, label); |
| 558 | while(count) { |
| 559 | linecount = (count > 16) ? 16 : count; |
| 560 | for(i=0; i < linecount; i++) |
| 561 | printk("%02X ",(unsigned char)data[i]); |
| 562 | for(;i<17;i++) |
| 563 | printk(" "); |
| 564 | for(i=0;i<linecount;i++) { |
| 565 | if (data[i]>=040 && data[i]<=0176) |
| 566 | printk("%c",data[i]); |
| 567 | else |
| 568 | printk("."); |
| 569 | } |
| 570 | printk("\n"); |
| 571 | data += linecount; |
| 572 | count -= linecount; |
| 573 | } |
| 574 | } |
| 575 | #else |
| 576 | #define DBGDATA(info, buf, size, label) |
| 577 | #endif |
| 578 | |
| 579 | #ifdef DBGTBUF |
| 580 | static void dump_tbufs(struct slgt_info *info) |
| 581 | { |
| 582 | int i; |
| 583 | printk("tbuf_current=%d\n", info->tbuf_current); |
| 584 | for (i=0 ; i < info->tbuf_count ; i++) { |
| 585 | printk("%d: count=%04X status=%04X\n", |
| 586 | i, le16_to_cpu(info->tbufs[i].count), le16_to_cpu(info->tbufs[i].status)); |
| 587 | } |
| 588 | } |
| 589 | #else |
| 590 | #define DBGTBUF(info) |
| 591 | #endif |
| 592 | |
| 593 | #ifdef DBGRBUF |
| 594 | static void dump_rbufs(struct slgt_info *info) |
| 595 | { |
| 596 | int i; |
| 597 | printk("rbuf_current=%d\n", info->rbuf_current); |
| 598 | for (i=0 ; i < info->rbuf_count ; i++) { |
| 599 | printk("%d: count=%04X status=%04X\n", |
| 600 | i, le16_to_cpu(info->rbufs[i].count), le16_to_cpu(info->rbufs[i].status)); |
| 601 | } |
| 602 | } |
| 603 | #else |
| 604 | #define DBGRBUF(info) |
| 605 | #endif |
| 606 | |
| 607 | static inline int sanity_check(struct slgt_info *info, char *devname, const char *name) |
| 608 | { |
| 609 | #ifdef SANITY_CHECK |
| 610 | if (!info) { |
| 611 | printk("null struct slgt_info for (%s) in %s\n", devname, name); |
| 612 | return 1; |
| 613 | } |
| 614 | if (info->magic != MGSL_MAGIC) { |
| 615 | printk("bad magic number struct slgt_info (%s) in %s\n", devname, name); |
| 616 | return 1; |
| 617 | } |
| 618 | #else |
| 619 | if (!info) |
| 620 | return 1; |
| 621 | #endif |
| 622 | return 0; |
| 623 | } |
| 624 | |
| 625 | /** |
| 626 | * line discipline callback wrappers |
| 627 | * |
| 628 | * The wrappers maintain line discipline references |
| 629 | * while calling into the line discipline. |
| 630 | * |
| 631 | * ldisc_receive_buf - pass receive data to line discipline |
| 632 | */ |
| 633 | static void ldisc_receive_buf(struct tty_struct *tty, |
| 634 | const __u8 *data, char *flags, int count) |
| 635 | { |
| 636 | struct tty_ldisc *ld; |
| 637 | if (!tty) |
| 638 | return; |
| 639 | ld = tty_ldisc_ref(tty); |
| 640 | if (ld) { |
Alan Cox | a352def | 2008-07-16 21:53:12 +0100 | [diff] [blame] | 641 | if (ld->ops->receive_buf) |
| 642 | ld->ops->receive_buf(tty, data, flags, count); |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 643 | tty_ldisc_deref(ld); |
| 644 | } |
| 645 | } |
| 646 | |
| 647 | /* tty callbacks */ |
| 648 | |
| 649 | static int open(struct tty_struct *tty, struct file *filp) |
| 650 | { |
| 651 | struct slgt_info *info; |
| 652 | int retval, line; |
| 653 | unsigned long flags; |
| 654 | |
| 655 | line = tty->index; |
Jiri Slaby | 410235f | 2012-03-05 14:52:01 +0100 | [diff] [blame] | 656 | if (line >= slgt_device_count) { |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 657 | DBGERR(("%s: open with invalid line #%d.\n", driver_name, line)); |
| 658 | return -ENODEV; |
| 659 | } |
| 660 | |
| 661 | info = slgt_device_list; |
| 662 | while(info && info->line != line) |
| 663 | info = info->next_device; |
| 664 | if (sanity_check(info, tty->name, "open")) |
| 665 | return -ENODEV; |
| 666 | if (info->init_error) { |
| 667 | DBGERR(("%s init error=%d\n", info->device_name, info->init_error)); |
| 668 | return -ENODEV; |
| 669 | } |
| 670 | |
| 671 | tty->driver_data = info; |
Alan Cox | 8fb06c7 | 2008-07-16 21:56:46 +0100 | [diff] [blame] | 672 | info->port.tty = tty; |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 673 | |
Alan Cox | 8fb06c7 | 2008-07-16 21:56:46 +0100 | [diff] [blame] | 674 | DBGINFO(("%s open, old ref count = %d\n", info->device_name, info->port.count)); |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 675 | |
| 676 | /* If port is closing, signal caller to try again */ |
Alan Cox | 8fb06c7 | 2008-07-16 21:56:46 +0100 | [diff] [blame] | 677 | if (tty_hung_up_p(filp) || info->port.flags & ASYNC_CLOSING){ |
| 678 | if (info->port.flags & ASYNC_CLOSING) |
| 679 | interruptible_sleep_on(&info->port.close_wait); |
| 680 | retval = ((info->port.flags & ASYNC_HUP_NOTIFY) ? |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 681 | -EAGAIN : -ERESTARTSYS); |
| 682 | goto cleanup; |
| 683 | } |
| 684 | |
Alan Cox | a360fae | 2010-06-01 22:52:50 +0200 | [diff] [blame] | 685 | mutex_lock(&info->port.mutex); |
Alan Cox | 8fb06c7 | 2008-07-16 21:56:46 +0100 | [diff] [blame] | 686 | info->port.tty->low_latency = (info->port.flags & ASYNC_LOW_LATENCY) ? 1 : 0; |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 687 | |
| 688 | spin_lock_irqsave(&info->netlock, flags); |
| 689 | if (info->netcount) { |
| 690 | retval = -EBUSY; |
| 691 | spin_unlock_irqrestore(&info->netlock, flags); |
Alan Cox | a360fae | 2010-06-01 22:52:50 +0200 | [diff] [blame] | 692 | mutex_unlock(&info->port.mutex); |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 693 | goto cleanup; |
| 694 | } |
Alan Cox | 8fb06c7 | 2008-07-16 21:56:46 +0100 | [diff] [blame] | 695 | info->port.count++; |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 696 | spin_unlock_irqrestore(&info->netlock, flags); |
| 697 | |
Alan Cox | 8fb06c7 | 2008-07-16 21:56:46 +0100 | [diff] [blame] | 698 | if (info->port.count == 1) { |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 699 | /* 1st open on this device, init hardware */ |
| 700 | retval = startup(info); |
Dan Carpenter | 80d04f2 | 2010-08-11 20:01:46 +0200 | [diff] [blame] | 701 | if (retval < 0) { |
| 702 | mutex_unlock(&info->port.mutex); |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 703 | goto cleanup; |
Dan Carpenter | 80d04f2 | 2010-08-11 20:01:46 +0200 | [diff] [blame] | 704 | } |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 705 | } |
Alan Cox | a360fae | 2010-06-01 22:52:50 +0200 | [diff] [blame] | 706 | mutex_unlock(&info->port.mutex); |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 707 | retval = block_til_ready(tty, filp, info); |
| 708 | if (retval) { |
| 709 | DBGINFO(("%s block_til_ready rc=%d\n", info->device_name, retval)); |
| 710 | goto cleanup; |
| 711 | } |
| 712 | |
| 713 | retval = 0; |
| 714 | |
| 715 | cleanup: |
| 716 | if (retval) { |
| 717 | if (tty->count == 1) |
Alan Cox | 8fb06c7 | 2008-07-16 21:56:46 +0100 | [diff] [blame] | 718 | info->port.tty = NULL; /* tty layer will release tty struct */ |
| 719 | if(info->port.count) |
| 720 | info->port.count--; |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 721 | } |
| 722 | |
| 723 | DBGINFO(("%s open rc=%d\n", info->device_name, retval)); |
| 724 | return retval; |
| 725 | } |
| 726 | |
| 727 | static void close(struct tty_struct *tty, struct file *filp) |
| 728 | { |
| 729 | struct slgt_info *info = tty->driver_data; |
| 730 | |
| 731 | if (sanity_check(info, tty->name, "close")) |
| 732 | return; |
Alan Cox | 8fb06c7 | 2008-07-16 21:56:46 +0100 | [diff] [blame] | 733 | DBGINFO(("%s close entry, count=%d\n", info->device_name, info->port.count)); |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 734 | |
Alan Cox | a661499 | 2009-01-02 13:46:50 +0000 | [diff] [blame] | 735 | if (tty_port_close_start(&info->port, tty, filp) == 0) |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 736 | goto cleanup; |
| 737 | |
Alan Cox | a360fae | 2010-06-01 22:52:50 +0200 | [diff] [blame] | 738 | mutex_lock(&info->port.mutex); |
Alan Cox | 8fb06c7 | 2008-07-16 21:56:46 +0100 | [diff] [blame] | 739 | if (info->port.flags & ASYNC_INITIALIZED) |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 740 | wait_until_sent(tty, info->timeout); |
Alan Cox | 978e595 | 2008-04-30 00:53:59 -0700 | [diff] [blame] | 741 | flush_buffer(tty); |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 742 | tty_ldisc_flush(tty); |
| 743 | |
| 744 | shutdown(info); |
Alan Cox | a360fae | 2010-06-01 22:52:50 +0200 | [diff] [blame] | 745 | mutex_unlock(&info->port.mutex); |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 746 | |
Alan Cox | a661499 | 2009-01-02 13:46:50 +0000 | [diff] [blame] | 747 | tty_port_close_end(&info->port, tty); |
Alan Cox | 8fb06c7 | 2008-07-16 21:56:46 +0100 | [diff] [blame] | 748 | info->port.tty = NULL; |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 749 | cleanup: |
Alan Cox | 8fb06c7 | 2008-07-16 21:56:46 +0100 | [diff] [blame] | 750 | DBGINFO(("%s close exit, count=%d\n", tty->driver->name, info->port.count)); |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 751 | } |
| 752 | |
| 753 | static void hangup(struct tty_struct *tty) |
| 754 | { |
| 755 | struct slgt_info *info = tty->driver_data; |
Alan Cox | a360fae | 2010-06-01 22:52:50 +0200 | [diff] [blame] | 756 | unsigned long flags; |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 757 | |
| 758 | if (sanity_check(info, tty->name, "hangup")) |
| 759 | return; |
| 760 | DBGINFO(("%s hangup\n", info->device_name)); |
| 761 | |
| 762 | flush_buffer(tty); |
Alan Cox | a360fae | 2010-06-01 22:52:50 +0200 | [diff] [blame] | 763 | |
| 764 | mutex_lock(&info->port.mutex); |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 765 | shutdown(info); |
| 766 | |
Alan Cox | a360fae | 2010-06-01 22:52:50 +0200 | [diff] [blame] | 767 | spin_lock_irqsave(&info->port.lock, flags); |
Alan Cox | 8fb06c7 | 2008-07-16 21:56:46 +0100 | [diff] [blame] | 768 | info->port.count = 0; |
| 769 | info->port.flags &= ~ASYNC_NORMAL_ACTIVE; |
| 770 | info->port.tty = NULL; |
Alan Cox | a360fae | 2010-06-01 22:52:50 +0200 | [diff] [blame] | 771 | spin_unlock_irqrestore(&info->port.lock, flags); |
| 772 | mutex_unlock(&info->port.mutex); |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 773 | |
Alan Cox | 8fb06c7 | 2008-07-16 21:56:46 +0100 | [diff] [blame] | 774 | wake_up_interruptible(&info->port.open_wait); |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 775 | } |
| 776 | |
Alan Cox | 606d099 | 2006-12-08 02:38:45 -0800 | [diff] [blame] | 777 | static void set_termios(struct tty_struct *tty, struct ktermios *old_termios) |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 778 | { |
| 779 | struct slgt_info *info = tty->driver_data; |
| 780 | unsigned long flags; |
| 781 | |
| 782 | DBGINFO(("%s set_termios\n", tty->driver->name)); |
| 783 | |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 784 | change_params(info); |
| 785 | |
| 786 | /* Handle transition to B0 status */ |
| 787 | if (old_termios->c_cflag & CBAUD && |
Alan Cox | adc8d74 | 2012-07-14 15:31:47 +0100 | [diff] [blame] | 788 | !(tty->termios.c_cflag & CBAUD)) { |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 789 | info->signals &= ~(SerialSignal_RTS + SerialSignal_DTR); |
| 790 | spin_lock_irqsave(&info->lock,flags); |
| 791 | set_signals(info); |
| 792 | spin_unlock_irqrestore(&info->lock,flags); |
| 793 | } |
| 794 | |
| 795 | /* Handle transition away from B0 status */ |
| 796 | if (!(old_termios->c_cflag & CBAUD) && |
Alan Cox | adc8d74 | 2012-07-14 15:31:47 +0100 | [diff] [blame] | 797 | tty->termios.c_cflag & CBAUD) { |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 798 | info->signals |= SerialSignal_DTR; |
Alan Cox | adc8d74 | 2012-07-14 15:31:47 +0100 | [diff] [blame] | 799 | if (!(tty->termios.c_cflag & CRTSCTS) || |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 800 | !test_bit(TTY_THROTTLED, &tty->flags)) { |
| 801 | info->signals |= SerialSignal_RTS; |
| 802 | } |
| 803 | spin_lock_irqsave(&info->lock,flags); |
| 804 | set_signals(info); |
| 805 | spin_unlock_irqrestore(&info->lock,flags); |
| 806 | } |
| 807 | |
| 808 | /* Handle turning off CRTSCTS */ |
| 809 | if (old_termios->c_cflag & CRTSCTS && |
Alan Cox | adc8d74 | 2012-07-14 15:31:47 +0100 | [diff] [blame] | 810 | !(tty->termios.c_cflag & CRTSCTS)) { |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 811 | tty->hw_stopped = 0; |
| 812 | tx_release(tty); |
| 813 | } |
| 814 | } |
| 815 | |
Paul Fulghum | ce89294 | 2009-06-24 18:34:51 +0100 | [diff] [blame] | 816 | static void update_tx_timer(struct slgt_info *info) |
| 817 | { |
| 818 | /* |
| 819 | * use worst case speed of 1200bps to calculate transmit timeout |
| 820 | * based on data in buffers (tbuf_bytes) and FIFO (128 bytes) |
| 821 | */ |
| 822 | if (info->params.mode == MGSL_MODE_HDLC) { |
| 823 | int timeout = (tbuf_bytes(info) * 7) + 1000; |
| 824 | mod_timer(&info->tx_timer, jiffies + msecs_to_jiffies(timeout)); |
| 825 | } |
| 826 | } |
| 827 | |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 828 | static int write(struct tty_struct *tty, |
| 829 | const unsigned char *buf, int count) |
| 830 | { |
| 831 | int ret = 0; |
| 832 | struct slgt_info *info = tty->driver_data; |
| 833 | unsigned long flags; |
| 834 | |
| 835 | if (sanity_check(info, tty->name, "write")) |
Paul Fulghum | de538eb | 2009-12-09 12:31:39 -0800 | [diff] [blame] | 836 | return -EIO; |
| 837 | |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 838 | DBGINFO(("%s write count=%d\n", info->device_name, count)); |
| 839 | |
Paul Fulghum | de538eb | 2009-12-09 12:31:39 -0800 | [diff] [blame] | 840 | if (!info->tx_buf || (count > info->max_frame_size)) |
| 841 | return -EIO; |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 842 | |
Paul Fulghum | de538eb | 2009-12-09 12:31:39 -0800 | [diff] [blame] | 843 | if (!count || tty->stopped || tty->hw_stopped) |
| 844 | return 0; |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 845 | |
Paul Fulghum | de538eb | 2009-12-09 12:31:39 -0800 | [diff] [blame] | 846 | spin_lock_irqsave(&info->lock, flags); |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 847 | |
Paul Fulghum | de538eb | 2009-12-09 12:31:39 -0800 | [diff] [blame] | 848 | if (info->tx_count) { |
Paul Fulghum | 8a38c28 | 2008-07-22 11:21:28 +0100 | [diff] [blame] | 849 | /* send accumulated data from send_char() */ |
Paul Fulghum | de538eb | 2009-12-09 12:31:39 -0800 | [diff] [blame] | 850 | if (!tx_load(info, info->tx_buf, info->tx_count)) |
| 851 | goto cleanup; |
| 852 | info->tx_count = 0; |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 853 | } |
| 854 | |
Paul Fulghum | de538eb | 2009-12-09 12:31:39 -0800 | [diff] [blame] | 855 | if (tx_load(info, buf, count)) |
| 856 | ret = count; |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 857 | |
| 858 | cleanup: |
Paul Fulghum | de538eb | 2009-12-09 12:31:39 -0800 | [diff] [blame] | 859 | spin_unlock_irqrestore(&info->lock, flags); |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 860 | DBGINFO(("%s write rc=%d\n", info->device_name, ret)); |
| 861 | return ret; |
| 862 | } |
| 863 | |
Alan Cox | 55da778 | 2008-04-30 00:54:07 -0700 | [diff] [blame] | 864 | static int put_char(struct tty_struct *tty, unsigned char ch) |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 865 | { |
| 866 | struct slgt_info *info = tty->driver_data; |
| 867 | unsigned long flags; |
Andrew Morton | 6c82c41 | 2008-05-12 14:02:34 -0700 | [diff] [blame] | 868 | int ret = 0; |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 869 | |
| 870 | if (sanity_check(info, tty->name, "put_char")) |
Alan Cox | 55da778 | 2008-04-30 00:54:07 -0700 | [diff] [blame] | 871 | return 0; |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 872 | DBGINFO(("%s put_char(%d)\n", info->device_name, ch)); |
Eric Sesterhenn | 326f28e9 | 2006-06-25 05:48:48 -0700 | [diff] [blame] | 873 | if (!info->tx_buf) |
Alan Cox | 55da778 | 2008-04-30 00:54:07 -0700 | [diff] [blame] | 874 | return 0; |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 875 | spin_lock_irqsave(&info->lock,flags); |
Paul Fulghum | de538eb | 2009-12-09 12:31:39 -0800 | [diff] [blame] | 876 | if (info->tx_count < info->max_frame_size) { |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 877 | info->tx_buf[info->tx_count++] = ch; |
Alan Cox | 55da778 | 2008-04-30 00:54:07 -0700 | [diff] [blame] | 878 | ret = 1; |
| 879 | } |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 880 | spin_unlock_irqrestore(&info->lock,flags); |
Alan Cox | 55da778 | 2008-04-30 00:54:07 -0700 | [diff] [blame] | 881 | return ret; |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 882 | } |
| 883 | |
| 884 | static void send_xchar(struct tty_struct *tty, char ch) |
| 885 | { |
| 886 | struct slgt_info *info = tty->driver_data; |
| 887 | unsigned long flags; |
| 888 | |
| 889 | if (sanity_check(info, tty->name, "send_xchar")) |
| 890 | return; |
| 891 | DBGINFO(("%s send_xchar(%d)\n", info->device_name, ch)); |
| 892 | info->x_char = ch; |
| 893 | if (ch) { |
| 894 | spin_lock_irqsave(&info->lock,flags); |
| 895 | if (!info->tx_enabled) |
| 896 | tx_start(info); |
| 897 | spin_unlock_irqrestore(&info->lock,flags); |
| 898 | } |
| 899 | } |
| 900 | |
| 901 | static void wait_until_sent(struct tty_struct *tty, int timeout) |
| 902 | { |
| 903 | struct slgt_info *info = tty->driver_data; |
| 904 | unsigned long orig_jiffies, char_time; |
| 905 | |
| 906 | if (!info ) |
| 907 | return; |
| 908 | if (sanity_check(info, tty->name, "wait_until_sent")) |
| 909 | return; |
| 910 | DBGINFO(("%s wait_until_sent entry\n", info->device_name)); |
Alan Cox | 8fb06c7 | 2008-07-16 21:56:46 +0100 | [diff] [blame] | 911 | if (!(info->port.flags & ASYNC_INITIALIZED)) |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 912 | goto exit; |
| 913 | |
| 914 | orig_jiffies = jiffies; |
| 915 | |
| 916 | /* Set check interval to 1/5 of estimated time to |
| 917 | * send a character, and make it at least 1. The check |
| 918 | * interval should also be less than the timeout. |
| 919 | * Note: use tight timings here to satisfy the NIST-PCTS. |
| 920 | */ |
| 921 | |
| 922 | if (info->params.data_rate) { |
| 923 | char_time = info->timeout/(32 * 5); |
| 924 | if (!char_time) |
| 925 | char_time++; |
| 926 | } else |
| 927 | char_time = 1; |
| 928 | |
| 929 | if (timeout) |
| 930 | char_time = min_t(unsigned long, char_time, timeout); |
| 931 | |
| 932 | while (info->tx_active) { |
| 933 | msleep_interruptible(jiffies_to_msecs(char_time)); |
| 934 | if (signal_pending(current)) |
| 935 | break; |
| 936 | if (timeout && time_after(jiffies, orig_jiffies + timeout)) |
| 937 | break; |
| 938 | } |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 939 | exit: |
| 940 | DBGINFO(("%s wait_until_sent exit\n", info->device_name)); |
| 941 | } |
| 942 | |
| 943 | static int write_room(struct tty_struct *tty) |
| 944 | { |
| 945 | struct slgt_info *info = tty->driver_data; |
| 946 | int ret; |
| 947 | |
| 948 | if (sanity_check(info, tty->name, "write_room")) |
| 949 | return 0; |
| 950 | ret = (info->tx_active) ? 0 : HDLC_MAX_FRAME_SIZE; |
| 951 | DBGINFO(("%s write_room=%d\n", info->device_name, ret)); |
| 952 | return ret; |
| 953 | } |
| 954 | |
| 955 | static void flush_chars(struct tty_struct *tty) |
| 956 | { |
| 957 | struct slgt_info *info = tty->driver_data; |
| 958 | unsigned long flags; |
| 959 | |
| 960 | if (sanity_check(info, tty->name, "flush_chars")) |
| 961 | return; |
| 962 | DBGINFO(("%s flush_chars entry tx_count=%d\n", info->device_name, info->tx_count)); |
| 963 | |
| 964 | if (info->tx_count <= 0 || tty->stopped || |
| 965 | tty->hw_stopped || !info->tx_buf) |
| 966 | return; |
| 967 | |
| 968 | DBGINFO(("%s flush_chars start transmit\n", info->device_name)); |
| 969 | |
| 970 | spin_lock_irqsave(&info->lock,flags); |
Paul Fulghum | de538eb | 2009-12-09 12:31:39 -0800 | [diff] [blame] | 971 | if (info->tx_count && tx_load(info, info->tx_buf, info->tx_count)) |
| 972 | info->tx_count = 0; |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 973 | spin_unlock_irqrestore(&info->lock,flags); |
| 974 | } |
| 975 | |
| 976 | static void flush_buffer(struct tty_struct *tty) |
| 977 | { |
| 978 | struct slgt_info *info = tty->driver_data; |
| 979 | unsigned long flags; |
| 980 | |
| 981 | if (sanity_check(info, tty->name, "flush_buffer")) |
| 982 | return; |
| 983 | DBGINFO(("%s flush_buffer\n", info->device_name)); |
| 984 | |
Paul Fulghum | de538eb | 2009-12-09 12:31:39 -0800 | [diff] [blame] | 985 | spin_lock_irqsave(&info->lock, flags); |
| 986 | info->tx_count = 0; |
| 987 | spin_unlock_irqrestore(&info->lock, flags); |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 988 | |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 989 | tty_wakeup(tty); |
| 990 | } |
| 991 | |
| 992 | /* |
| 993 | * throttle (stop) transmitter |
| 994 | */ |
| 995 | static void tx_hold(struct tty_struct *tty) |
| 996 | { |
| 997 | struct slgt_info *info = tty->driver_data; |
| 998 | unsigned long flags; |
| 999 | |
| 1000 | if (sanity_check(info, tty->name, "tx_hold")) |
| 1001 | return; |
| 1002 | DBGINFO(("%s tx_hold\n", info->device_name)); |
| 1003 | spin_lock_irqsave(&info->lock,flags); |
| 1004 | if (info->tx_enabled && info->params.mode == MGSL_MODE_ASYNC) |
| 1005 | tx_stop(info); |
| 1006 | spin_unlock_irqrestore(&info->lock,flags); |
| 1007 | } |
| 1008 | |
| 1009 | /* |
| 1010 | * release (start) transmitter |
| 1011 | */ |
| 1012 | static void tx_release(struct tty_struct *tty) |
| 1013 | { |
| 1014 | struct slgt_info *info = tty->driver_data; |
| 1015 | unsigned long flags; |
| 1016 | |
| 1017 | if (sanity_check(info, tty->name, "tx_release")) |
| 1018 | return; |
| 1019 | DBGINFO(("%s tx_release\n", info->device_name)); |
Paul Fulghum | de538eb | 2009-12-09 12:31:39 -0800 | [diff] [blame] | 1020 | spin_lock_irqsave(&info->lock, flags); |
| 1021 | if (info->tx_count && tx_load(info, info->tx_buf, info->tx_count)) |
| 1022 | info->tx_count = 0; |
| 1023 | spin_unlock_irqrestore(&info->lock, flags); |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 1024 | } |
| 1025 | |
| 1026 | /* |
| 1027 | * Service an IOCTL request |
| 1028 | * |
| 1029 | * Arguments |
| 1030 | * |
| 1031 | * tty pointer to tty instance data |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 1032 | * cmd IOCTL command code |
| 1033 | * arg command argument/context |
| 1034 | * |
| 1035 | * Return 0 if success, otherwise error code |
| 1036 | */ |
Alan Cox | 6caa76b | 2011-02-14 16:27:22 +0000 | [diff] [blame] | 1037 | static int ioctl(struct tty_struct *tty, |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 1038 | unsigned int cmd, unsigned long arg) |
| 1039 | { |
| 1040 | struct slgt_info *info = tty->driver_data; |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 1041 | void __user *argp = (void __user *)arg; |
Alan Cox | 1f8cabb | 2008-04-30 00:53:24 -0700 | [diff] [blame] | 1042 | int ret; |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 1043 | |
| 1044 | if (sanity_check(info, tty->name, "ioctl")) |
| 1045 | return -ENODEV; |
| 1046 | DBGINFO(("%s ioctl() cmd=%08X\n", info->device_name, cmd)); |
| 1047 | |
| 1048 | if ((cmd != TIOCGSERIAL) && (cmd != TIOCSSERIAL) && |
Alan Cox | 0587102 | 2010-09-16 18:21:52 +0100 | [diff] [blame] | 1049 | (cmd != TIOCMIWAIT)) { |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 1050 | if (tty->flags & (1 << TTY_IO_ERROR)) |
| 1051 | return -EIO; |
| 1052 | } |
| 1053 | |
Alan Cox | f602501 | 2010-06-01 22:52:46 +0200 | [diff] [blame] | 1054 | switch (cmd) { |
| 1055 | case MGSL_IOCWAITEVENT: |
| 1056 | return wait_mgsl_event(info, argp); |
| 1057 | case TIOCMIWAIT: |
| 1058 | return modem_input_wait(info,(int)arg); |
Alan Cox | f602501 | 2010-06-01 22:52:46 +0200 | [diff] [blame] | 1059 | case MGSL_IOCSGPIO: |
| 1060 | return set_gpio(info, argp); |
| 1061 | case MGSL_IOCGGPIO: |
| 1062 | return get_gpio(info, argp); |
| 1063 | case MGSL_IOCWAITGPIO: |
| 1064 | return wait_gpio(info, argp); |
Paul Fulghum | 9807224 | 2010-10-27 15:34:22 -0700 | [diff] [blame] | 1065 | case MGSL_IOCGXSYNC: |
| 1066 | return get_xsync(info, argp); |
| 1067 | case MGSL_IOCSXSYNC: |
| 1068 | return set_xsync(info, (int)arg); |
| 1069 | case MGSL_IOCGXCTRL: |
| 1070 | return get_xctrl(info, argp); |
| 1071 | case MGSL_IOCSXCTRL: |
| 1072 | return set_xctrl(info, (int)arg); |
Alan Cox | f602501 | 2010-06-01 22:52:46 +0200 | [diff] [blame] | 1073 | } |
| 1074 | mutex_lock(&info->port.mutex); |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 1075 | switch (cmd) { |
| 1076 | case MGSL_IOCGPARAMS: |
Alan Cox | 1f8cabb | 2008-04-30 00:53:24 -0700 | [diff] [blame] | 1077 | ret = get_params(info, argp); |
| 1078 | break; |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 1079 | case MGSL_IOCSPARAMS: |
Alan Cox | 1f8cabb | 2008-04-30 00:53:24 -0700 | [diff] [blame] | 1080 | ret = set_params(info, argp); |
| 1081 | break; |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 1082 | case MGSL_IOCGTXIDLE: |
Alan Cox | 1f8cabb | 2008-04-30 00:53:24 -0700 | [diff] [blame] | 1083 | ret = get_txidle(info, argp); |
| 1084 | break; |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 1085 | case MGSL_IOCSTXIDLE: |
Alan Cox | 1f8cabb | 2008-04-30 00:53:24 -0700 | [diff] [blame] | 1086 | ret = set_txidle(info, (int)arg); |
| 1087 | break; |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 1088 | case MGSL_IOCTXENABLE: |
Alan Cox | 1f8cabb | 2008-04-30 00:53:24 -0700 | [diff] [blame] | 1089 | ret = tx_enable(info, (int)arg); |
| 1090 | break; |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 1091 | case MGSL_IOCRXENABLE: |
Alan Cox | 1f8cabb | 2008-04-30 00:53:24 -0700 | [diff] [blame] | 1092 | ret = rx_enable(info, (int)arg); |
| 1093 | break; |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 1094 | case MGSL_IOCTXABORT: |
Alan Cox | 1f8cabb | 2008-04-30 00:53:24 -0700 | [diff] [blame] | 1095 | ret = tx_abort(info); |
| 1096 | break; |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 1097 | case MGSL_IOCGSTATS: |
Alan Cox | 1f8cabb | 2008-04-30 00:53:24 -0700 | [diff] [blame] | 1098 | ret = get_stats(info, argp); |
| 1099 | break; |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 1100 | case MGSL_IOCGIF: |
Alan Cox | 1f8cabb | 2008-04-30 00:53:24 -0700 | [diff] [blame] | 1101 | ret = get_interface(info, argp); |
| 1102 | break; |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 1103 | case MGSL_IOCSIF: |
Alan Cox | 1f8cabb | 2008-04-30 00:53:24 -0700 | [diff] [blame] | 1104 | ret = set_interface(info,(int)arg); |
| 1105 | break; |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 1106 | default: |
Alan Cox | 1f8cabb | 2008-04-30 00:53:24 -0700 | [diff] [blame] | 1107 | ret = -ENOIOCTLCMD; |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 1108 | } |
Alan Cox | f602501 | 2010-06-01 22:52:46 +0200 | [diff] [blame] | 1109 | mutex_unlock(&info->port.mutex); |
Alan Cox | 1f8cabb | 2008-04-30 00:53:24 -0700 | [diff] [blame] | 1110 | return ret; |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 1111 | } |
| 1112 | |
Alan Cox | 0587102 | 2010-09-16 18:21:52 +0100 | [diff] [blame] | 1113 | static int get_icount(struct tty_struct *tty, |
| 1114 | struct serial_icounter_struct *icount) |
| 1115 | |
| 1116 | { |
| 1117 | struct slgt_info *info = tty->driver_data; |
| 1118 | struct mgsl_icount cnow; /* kernel counter temps */ |
| 1119 | unsigned long flags; |
| 1120 | |
| 1121 | spin_lock_irqsave(&info->lock,flags); |
| 1122 | cnow = info->icount; |
| 1123 | spin_unlock_irqrestore(&info->lock,flags); |
| 1124 | |
| 1125 | icount->cts = cnow.cts; |
| 1126 | icount->dsr = cnow.dsr; |
| 1127 | icount->rng = cnow.rng; |
| 1128 | icount->dcd = cnow.dcd; |
| 1129 | icount->rx = cnow.rx; |
| 1130 | icount->tx = cnow.tx; |
| 1131 | icount->frame = cnow.frame; |
| 1132 | icount->overrun = cnow.overrun; |
| 1133 | icount->parity = cnow.parity; |
| 1134 | icount->brk = cnow.brk; |
| 1135 | icount->buf_overrun = cnow.buf_overrun; |
| 1136 | |
| 1137 | return 0; |
| 1138 | } |
| 1139 | |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 1140 | /* |
Paul Fulghum | 2acdb16 | 2007-05-10 22:22:43 -0700 | [diff] [blame] | 1141 | * support for 32 bit ioctl calls on 64 bit systems |
| 1142 | */ |
| 1143 | #ifdef CONFIG_COMPAT |
| 1144 | static long get_params32(struct slgt_info *info, struct MGSL_PARAMS32 __user *user_params) |
| 1145 | { |
| 1146 | struct MGSL_PARAMS32 tmp_params; |
| 1147 | |
| 1148 | DBGINFO(("%s get_params32\n", info->device_name)); |
Vasiliy Kulikov | ed77ed6 | 2010-10-27 15:34:22 -0700 | [diff] [blame] | 1149 | memset(&tmp_params, 0, sizeof(tmp_params)); |
Paul Fulghum | 2acdb16 | 2007-05-10 22:22:43 -0700 | [diff] [blame] | 1150 | tmp_params.mode = (compat_ulong_t)info->params.mode; |
| 1151 | tmp_params.loopback = info->params.loopback; |
| 1152 | tmp_params.flags = info->params.flags; |
| 1153 | tmp_params.encoding = info->params.encoding; |
| 1154 | tmp_params.clock_speed = (compat_ulong_t)info->params.clock_speed; |
| 1155 | tmp_params.addr_filter = info->params.addr_filter; |
| 1156 | tmp_params.crc_type = info->params.crc_type; |
| 1157 | tmp_params.preamble_length = info->params.preamble_length; |
| 1158 | tmp_params.preamble = info->params.preamble; |
| 1159 | tmp_params.data_rate = (compat_ulong_t)info->params.data_rate; |
| 1160 | tmp_params.data_bits = info->params.data_bits; |
| 1161 | tmp_params.stop_bits = info->params.stop_bits; |
| 1162 | tmp_params.parity = info->params.parity; |
| 1163 | if (copy_to_user(user_params, &tmp_params, sizeof(struct MGSL_PARAMS32))) |
| 1164 | return -EFAULT; |
| 1165 | return 0; |
| 1166 | } |
| 1167 | |
| 1168 | static long set_params32(struct slgt_info *info, struct MGSL_PARAMS32 __user *new_params) |
| 1169 | { |
| 1170 | struct MGSL_PARAMS32 tmp_params; |
| 1171 | |
| 1172 | DBGINFO(("%s set_params32\n", info->device_name)); |
| 1173 | if (copy_from_user(&tmp_params, new_params, sizeof(struct MGSL_PARAMS32))) |
| 1174 | return -EFAULT; |
| 1175 | |
| 1176 | spin_lock(&info->lock); |
Paul Fulghum | 1f80769 | 2009-04-02 16:58:30 -0700 | [diff] [blame] | 1177 | if (tmp_params.mode == MGSL_MODE_BASE_CLOCK) { |
| 1178 | info->base_clock = tmp_params.clock_speed; |
| 1179 | } else { |
| 1180 | info->params.mode = tmp_params.mode; |
| 1181 | info->params.loopback = tmp_params.loopback; |
| 1182 | info->params.flags = tmp_params.flags; |
| 1183 | info->params.encoding = tmp_params.encoding; |
| 1184 | info->params.clock_speed = tmp_params.clock_speed; |
| 1185 | info->params.addr_filter = tmp_params.addr_filter; |
| 1186 | info->params.crc_type = tmp_params.crc_type; |
| 1187 | info->params.preamble_length = tmp_params.preamble_length; |
| 1188 | info->params.preamble = tmp_params.preamble; |
| 1189 | info->params.data_rate = tmp_params.data_rate; |
| 1190 | info->params.data_bits = tmp_params.data_bits; |
| 1191 | info->params.stop_bits = tmp_params.stop_bits; |
| 1192 | info->params.parity = tmp_params.parity; |
| 1193 | } |
Paul Fulghum | 2acdb16 | 2007-05-10 22:22:43 -0700 | [diff] [blame] | 1194 | spin_unlock(&info->lock); |
| 1195 | |
Paul Fulghum | 1f80769 | 2009-04-02 16:58:30 -0700 | [diff] [blame] | 1196 | program_hw(info); |
Paul Fulghum | 2acdb16 | 2007-05-10 22:22:43 -0700 | [diff] [blame] | 1197 | |
| 1198 | return 0; |
| 1199 | } |
| 1200 | |
Alan Cox | 6caa76b | 2011-02-14 16:27:22 +0000 | [diff] [blame] | 1201 | static long slgt_compat_ioctl(struct tty_struct *tty, |
Paul Fulghum | 2acdb16 | 2007-05-10 22:22:43 -0700 | [diff] [blame] | 1202 | unsigned int cmd, unsigned long arg) |
| 1203 | { |
| 1204 | struct slgt_info *info = tty->driver_data; |
| 1205 | int rc = -ENOIOCTLCMD; |
| 1206 | |
| 1207 | if (sanity_check(info, tty->name, "compat_ioctl")) |
| 1208 | return -ENODEV; |
| 1209 | DBGINFO(("%s compat_ioctl() cmd=%08X\n", info->device_name, cmd)); |
| 1210 | |
| 1211 | switch (cmd) { |
| 1212 | |
| 1213 | case MGSL_IOCSPARAMS32: |
| 1214 | rc = set_params32(info, compat_ptr(arg)); |
| 1215 | break; |
| 1216 | |
| 1217 | case MGSL_IOCGPARAMS32: |
| 1218 | rc = get_params32(info, compat_ptr(arg)); |
| 1219 | break; |
| 1220 | |
| 1221 | case MGSL_IOCGPARAMS: |
| 1222 | case MGSL_IOCSPARAMS: |
| 1223 | case MGSL_IOCGTXIDLE: |
| 1224 | case MGSL_IOCGSTATS: |
| 1225 | case MGSL_IOCWAITEVENT: |
| 1226 | case MGSL_IOCGIF: |
| 1227 | case MGSL_IOCSGPIO: |
| 1228 | case MGSL_IOCGGPIO: |
| 1229 | case MGSL_IOCWAITGPIO: |
Paul Fulghum | 9807224 | 2010-10-27 15:34:22 -0700 | [diff] [blame] | 1230 | case MGSL_IOCGXSYNC: |
| 1231 | case MGSL_IOCGXCTRL: |
Paul Fulghum | 2acdb16 | 2007-05-10 22:22:43 -0700 | [diff] [blame] | 1232 | case MGSL_IOCSTXIDLE: |
| 1233 | case MGSL_IOCTXENABLE: |
| 1234 | case MGSL_IOCRXENABLE: |
| 1235 | case MGSL_IOCTXABORT: |
| 1236 | case TIOCMIWAIT: |
| 1237 | case MGSL_IOCSIF: |
Paul Fulghum | 9807224 | 2010-10-27 15:34:22 -0700 | [diff] [blame] | 1238 | case MGSL_IOCSXSYNC: |
| 1239 | case MGSL_IOCSXCTRL: |
Alan Cox | 6caa76b | 2011-02-14 16:27:22 +0000 | [diff] [blame] | 1240 | rc = ioctl(tty, cmd, arg); |
Paul Fulghum | 2acdb16 | 2007-05-10 22:22:43 -0700 | [diff] [blame] | 1241 | break; |
| 1242 | } |
| 1243 | |
| 1244 | DBGINFO(("%s compat_ioctl() cmd=%08X rc=%d\n", info->device_name, cmd, rc)); |
| 1245 | return rc; |
| 1246 | } |
| 1247 | #else |
| 1248 | #define slgt_compat_ioctl NULL |
| 1249 | #endif /* ifdef CONFIG_COMPAT */ |
| 1250 | |
| 1251 | /* |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 1252 | * proc fs support |
| 1253 | */ |
Alexey Dobriyan | a18c56e | 2009-03-31 15:19:19 -0700 | [diff] [blame] | 1254 | static inline void line_info(struct seq_file *m, struct slgt_info *info) |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 1255 | { |
| 1256 | char stat_buf[30]; |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 1257 | unsigned long flags; |
| 1258 | |
Alexey Dobriyan | a18c56e | 2009-03-31 15:19:19 -0700 | [diff] [blame] | 1259 | seq_printf(m, "%s: IO=%08X IRQ=%d MaxFrameSize=%u\n", |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 1260 | info->device_name, info->phys_reg_addr, |
| 1261 | info->irq_level, info->max_frame_size); |
| 1262 | |
| 1263 | /* output current serial signal states */ |
| 1264 | spin_lock_irqsave(&info->lock,flags); |
| 1265 | get_signals(info); |
| 1266 | spin_unlock_irqrestore(&info->lock,flags); |
| 1267 | |
| 1268 | stat_buf[0] = 0; |
| 1269 | stat_buf[1] = 0; |
| 1270 | if (info->signals & SerialSignal_RTS) |
| 1271 | strcat(stat_buf, "|RTS"); |
| 1272 | if (info->signals & SerialSignal_CTS) |
| 1273 | strcat(stat_buf, "|CTS"); |
| 1274 | if (info->signals & SerialSignal_DTR) |
| 1275 | strcat(stat_buf, "|DTR"); |
| 1276 | if (info->signals & SerialSignal_DSR) |
| 1277 | strcat(stat_buf, "|DSR"); |
| 1278 | if (info->signals & SerialSignal_DCD) |
| 1279 | strcat(stat_buf, "|CD"); |
| 1280 | if (info->signals & SerialSignal_RI) |
| 1281 | strcat(stat_buf, "|RI"); |
| 1282 | |
| 1283 | if (info->params.mode != MGSL_MODE_ASYNC) { |
Alexey Dobriyan | a18c56e | 2009-03-31 15:19:19 -0700 | [diff] [blame] | 1284 | seq_printf(m, "\tHDLC txok:%d rxok:%d", |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 1285 | info->icount.txok, info->icount.rxok); |
| 1286 | if (info->icount.txunder) |
Alexey Dobriyan | a18c56e | 2009-03-31 15:19:19 -0700 | [diff] [blame] | 1287 | seq_printf(m, " txunder:%d", info->icount.txunder); |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 1288 | if (info->icount.txabort) |
Alexey Dobriyan | a18c56e | 2009-03-31 15:19:19 -0700 | [diff] [blame] | 1289 | seq_printf(m, " txabort:%d", info->icount.txabort); |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 1290 | if (info->icount.rxshort) |
Alexey Dobriyan | a18c56e | 2009-03-31 15:19:19 -0700 | [diff] [blame] | 1291 | seq_printf(m, " rxshort:%d", info->icount.rxshort); |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 1292 | if (info->icount.rxlong) |
Alexey Dobriyan | a18c56e | 2009-03-31 15:19:19 -0700 | [diff] [blame] | 1293 | seq_printf(m, " rxlong:%d", info->icount.rxlong); |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 1294 | if (info->icount.rxover) |
Alexey Dobriyan | a18c56e | 2009-03-31 15:19:19 -0700 | [diff] [blame] | 1295 | seq_printf(m, " rxover:%d", info->icount.rxover); |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 1296 | if (info->icount.rxcrc) |
Alexey Dobriyan | a18c56e | 2009-03-31 15:19:19 -0700 | [diff] [blame] | 1297 | seq_printf(m, " rxcrc:%d", info->icount.rxcrc); |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 1298 | } else { |
Alexey Dobriyan | a18c56e | 2009-03-31 15:19:19 -0700 | [diff] [blame] | 1299 | seq_printf(m, "\tASYNC tx:%d rx:%d", |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 1300 | info->icount.tx, info->icount.rx); |
| 1301 | if (info->icount.frame) |
Alexey Dobriyan | a18c56e | 2009-03-31 15:19:19 -0700 | [diff] [blame] | 1302 | seq_printf(m, " fe:%d", info->icount.frame); |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 1303 | if (info->icount.parity) |
Alexey Dobriyan | a18c56e | 2009-03-31 15:19:19 -0700 | [diff] [blame] | 1304 | seq_printf(m, " pe:%d", info->icount.parity); |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 1305 | if (info->icount.brk) |
Alexey Dobriyan | a18c56e | 2009-03-31 15:19:19 -0700 | [diff] [blame] | 1306 | seq_printf(m, " brk:%d", info->icount.brk); |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 1307 | if (info->icount.overrun) |
Alexey Dobriyan | a18c56e | 2009-03-31 15:19:19 -0700 | [diff] [blame] | 1308 | seq_printf(m, " oe:%d", info->icount.overrun); |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 1309 | } |
| 1310 | |
| 1311 | /* Append serial signal status to end */ |
Alexey Dobriyan | a18c56e | 2009-03-31 15:19:19 -0700 | [diff] [blame] | 1312 | seq_printf(m, " %s\n", stat_buf+1); |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 1313 | |
Alexey Dobriyan | a18c56e | 2009-03-31 15:19:19 -0700 | [diff] [blame] | 1314 | seq_printf(m, "\ttxactive=%d bh_req=%d bh_run=%d pending_bh=%x\n", |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 1315 | info->tx_active,info->bh_requested,info->bh_running, |
| 1316 | info->pending_bh); |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 1317 | } |
| 1318 | |
| 1319 | /* Called to print information about devices |
| 1320 | */ |
Alexey Dobriyan | a18c56e | 2009-03-31 15:19:19 -0700 | [diff] [blame] | 1321 | static int synclink_gt_proc_show(struct seq_file *m, void *v) |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 1322 | { |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 1323 | struct slgt_info *info; |
| 1324 | |
Alexey Dobriyan | a18c56e | 2009-03-31 15:19:19 -0700 | [diff] [blame] | 1325 | seq_puts(m, "synclink_gt driver\n"); |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 1326 | |
| 1327 | info = slgt_device_list; |
| 1328 | while( info ) { |
Alexey Dobriyan | a18c56e | 2009-03-31 15:19:19 -0700 | [diff] [blame] | 1329 | line_info(m, info); |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 1330 | info = info->next_device; |
| 1331 | } |
Alexey Dobriyan | a18c56e | 2009-03-31 15:19:19 -0700 | [diff] [blame] | 1332 | return 0; |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 1333 | } |
| 1334 | |
Alexey Dobriyan | a18c56e | 2009-03-31 15:19:19 -0700 | [diff] [blame] | 1335 | static int synclink_gt_proc_open(struct inode *inode, struct file *file) |
| 1336 | { |
| 1337 | return single_open(file, synclink_gt_proc_show, NULL); |
| 1338 | } |
| 1339 | |
| 1340 | static const struct file_operations synclink_gt_proc_fops = { |
| 1341 | .owner = THIS_MODULE, |
| 1342 | .open = synclink_gt_proc_open, |
| 1343 | .read = seq_read, |
| 1344 | .llseek = seq_lseek, |
| 1345 | .release = single_release, |
| 1346 | }; |
| 1347 | |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 1348 | /* |
| 1349 | * return count of bytes in transmit buffer |
| 1350 | */ |
| 1351 | static int chars_in_buffer(struct tty_struct *tty) |
| 1352 | { |
| 1353 | struct slgt_info *info = tty->driver_data; |
Paul Fulghum | 403214d | 2008-07-22 11:21:55 +0100 | [diff] [blame] | 1354 | int count; |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 1355 | if (sanity_check(info, tty->name, "chars_in_buffer")) |
| 1356 | return 0; |
Paul Fulghum | 403214d | 2008-07-22 11:21:55 +0100 | [diff] [blame] | 1357 | count = tbuf_bytes(info); |
| 1358 | DBGINFO(("%s chars_in_buffer()=%d\n", info->device_name, count)); |
| 1359 | return count; |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 1360 | } |
| 1361 | |
| 1362 | /* |
| 1363 | * signal remote device to throttle send data (our receive data) |
| 1364 | */ |
| 1365 | static void throttle(struct tty_struct * tty) |
| 1366 | { |
| 1367 | struct slgt_info *info = tty->driver_data; |
| 1368 | unsigned long flags; |
| 1369 | |
| 1370 | if (sanity_check(info, tty->name, "throttle")) |
| 1371 | return; |
| 1372 | DBGINFO(("%s throttle\n", info->device_name)); |
| 1373 | if (I_IXOFF(tty)) |
| 1374 | send_xchar(tty, STOP_CHAR(tty)); |
Alan Cox | adc8d74 | 2012-07-14 15:31:47 +0100 | [diff] [blame] | 1375 | if (tty->termios.c_cflag & CRTSCTS) { |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 1376 | spin_lock_irqsave(&info->lock,flags); |
| 1377 | info->signals &= ~SerialSignal_RTS; |
| 1378 | set_signals(info); |
| 1379 | spin_unlock_irqrestore(&info->lock,flags); |
| 1380 | } |
| 1381 | } |
| 1382 | |
| 1383 | /* |
| 1384 | * signal remote device to stop throttling send data (our receive data) |
| 1385 | */ |
| 1386 | static void unthrottle(struct tty_struct * tty) |
| 1387 | { |
| 1388 | struct slgt_info *info = tty->driver_data; |
| 1389 | unsigned long flags; |
| 1390 | |
| 1391 | if (sanity_check(info, tty->name, "unthrottle")) |
| 1392 | return; |
| 1393 | DBGINFO(("%s unthrottle\n", info->device_name)); |
| 1394 | if (I_IXOFF(tty)) { |
| 1395 | if (info->x_char) |
| 1396 | info->x_char = 0; |
| 1397 | else |
| 1398 | send_xchar(tty, START_CHAR(tty)); |
| 1399 | } |
Alan Cox | adc8d74 | 2012-07-14 15:31:47 +0100 | [diff] [blame] | 1400 | if (tty->termios.c_cflag & CRTSCTS) { |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 1401 | spin_lock_irqsave(&info->lock,flags); |
| 1402 | info->signals |= SerialSignal_RTS; |
| 1403 | set_signals(info); |
| 1404 | spin_unlock_irqrestore(&info->lock,flags); |
| 1405 | } |
| 1406 | } |
| 1407 | |
| 1408 | /* |
| 1409 | * set or clear transmit break condition |
| 1410 | * break_state -1=set break condition, 0=clear |
| 1411 | */ |
Alan Cox | 9e98966 | 2008-07-22 11:18:03 +0100 | [diff] [blame] | 1412 | static int set_break(struct tty_struct *tty, int break_state) |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 1413 | { |
| 1414 | struct slgt_info *info = tty->driver_data; |
| 1415 | unsigned short value; |
| 1416 | unsigned long flags; |
| 1417 | |
| 1418 | if (sanity_check(info, tty->name, "set_break")) |
Alan Cox | 9e98966 | 2008-07-22 11:18:03 +0100 | [diff] [blame] | 1419 | return -EINVAL; |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 1420 | DBGINFO(("%s set_break(%d)\n", info->device_name, break_state)); |
| 1421 | |
| 1422 | spin_lock_irqsave(&info->lock,flags); |
| 1423 | value = rd_reg16(info, TCR); |
| 1424 | if (break_state == -1) |
| 1425 | value |= BIT6; |
| 1426 | else |
| 1427 | value &= ~BIT6; |
| 1428 | wr_reg16(info, TCR, value); |
| 1429 | spin_unlock_irqrestore(&info->lock,flags); |
Alan Cox | 9e98966 | 2008-07-22 11:18:03 +0100 | [diff] [blame] | 1430 | return 0; |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 1431 | } |
| 1432 | |
Paul Fulghum | af69c7f | 2006-12-06 20:40:24 -0800 | [diff] [blame] | 1433 | #if SYNCLINK_GENERIC_HDLC |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 1434 | |
| 1435 | /** |
| 1436 | * called by generic HDLC layer when protocol selected (PPP, frame relay, etc.) |
| 1437 | * set encoding and frame check sequence (FCS) options |
| 1438 | * |
| 1439 | * dev pointer to network device structure |
| 1440 | * encoding serial encoding setting |
| 1441 | * parity FCS setting |
| 1442 | * |
| 1443 | * returns 0 if success, otherwise error code |
| 1444 | */ |
| 1445 | static int hdlcdev_attach(struct net_device *dev, unsigned short encoding, |
| 1446 | unsigned short parity) |
| 1447 | { |
| 1448 | struct slgt_info *info = dev_to_port(dev); |
| 1449 | unsigned char new_encoding; |
| 1450 | unsigned short new_crctype; |
| 1451 | |
| 1452 | /* return error if TTY interface open */ |
Alan Cox | 8fb06c7 | 2008-07-16 21:56:46 +0100 | [diff] [blame] | 1453 | if (info->port.count) |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 1454 | return -EBUSY; |
| 1455 | |
| 1456 | DBGINFO(("%s hdlcdev_attach\n", info->device_name)); |
| 1457 | |
| 1458 | switch (encoding) |
| 1459 | { |
| 1460 | case ENCODING_NRZ: new_encoding = HDLC_ENCODING_NRZ; break; |
| 1461 | case ENCODING_NRZI: new_encoding = HDLC_ENCODING_NRZI_SPACE; break; |
| 1462 | case ENCODING_FM_MARK: new_encoding = HDLC_ENCODING_BIPHASE_MARK; break; |
| 1463 | case ENCODING_FM_SPACE: new_encoding = HDLC_ENCODING_BIPHASE_SPACE; break; |
| 1464 | case ENCODING_MANCHESTER: new_encoding = HDLC_ENCODING_BIPHASE_LEVEL; break; |
| 1465 | default: return -EINVAL; |
| 1466 | } |
| 1467 | |
| 1468 | switch (parity) |
| 1469 | { |
| 1470 | case PARITY_NONE: new_crctype = HDLC_CRC_NONE; break; |
| 1471 | case PARITY_CRC16_PR1_CCITT: new_crctype = HDLC_CRC_16_CCITT; break; |
| 1472 | case PARITY_CRC32_PR1_CCITT: new_crctype = HDLC_CRC_32_CCITT; break; |
| 1473 | default: return -EINVAL; |
| 1474 | } |
| 1475 | |
| 1476 | info->params.encoding = new_encoding; |
Alexey Dobriyan | 53b3531 | 2006-03-24 03:16:13 -0800 | [diff] [blame] | 1477 | info->params.crc_type = new_crctype; |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 1478 | |
| 1479 | /* if network interface up, reprogram hardware */ |
| 1480 | if (info->netcount) |
| 1481 | program_hw(info); |
| 1482 | |
| 1483 | return 0; |
| 1484 | } |
| 1485 | |
| 1486 | /** |
| 1487 | * called by generic HDLC layer to send frame |
| 1488 | * |
| 1489 | * skb socket buffer containing HDLC frame |
| 1490 | * dev pointer to network device structure |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 1491 | */ |
Stephen Hemminger | 4c5d502 | 2009-08-31 19:50:48 +0000 | [diff] [blame] | 1492 | static netdev_tx_t hdlcdev_xmit(struct sk_buff *skb, |
| 1493 | struct net_device *dev) |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 1494 | { |
| 1495 | struct slgt_info *info = dev_to_port(dev); |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 1496 | unsigned long flags; |
| 1497 | |
| 1498 | DBGINFO(("%s hdlc_xmit\n", dev->name)); |
| 1499 | |
Paul Fulghum | de538eb | 2009-12-09 12:31:39 -0800 | [diff] [blame] | 1500 | if (!skb->len) |
| 1501 | return NETDEV_TX_OK; |
| 1502 | |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 1503 | /* stop sending until this frame completes */ |
| 1504 | netif_stop_queue(dev); |
| 1505 | |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 1506 | /* update network statistics */ |
Krzysztof Halasa | 198191c | 2008-06-30 23:26:53 +0200 | [diff] [blame] | 1507 | dev->stats.tx_packets++; |
| 1508 | dev->stats.tx_bytes += skb->len; |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 1509 | |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 1510 | /* save start time for transmit timeout detection */ |
| 1511 | dev->trans_start = jiffies; |
| 1512 | |
Paul Fulghum | de538eb | 2009-12-09 12:31:39 -0800 | [diff] [blame] | 1513 | spin_lock_irqsave(&info->lock, flags); |
| 1514 | tx_load(info, skb->data, skb->len); |
| 1515 | spin_unlock_irqrestore(&info->lock, flags); |
| 1516 | |
| 1517 | /* done with socket buffer, so free it */ |
| 1518 | dev_kfree_skb(skb); |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 1519 | |
Stephen Hemminger | 4c5d502 | 2009-08-31 19:50:48 +0000 | [diff] [blame] | 1520 | return NETDEV_TX_OK; |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 1521 | } |
| 1522 | |
| 1523 | /** |
| 1524 | * called by network layer when interface enabled |
| 1525 | * claim resources and initialize hardware |
| 1526 | * |
| 1527 | * dev pointer to network device structure |
| 1528 | * |
| 1529 | * returns 0 if success, otherwise error code |
| 1530 | */ |
| 1531 | static int hdlcdev_open(struct net_device *dev) |
| 1532 | { |
| 1533 | struct slgt_info *info = dev_to_port(dev); |
| 1534 | int rc; |
| 1535 | unsigned long flags; |
| 1536 | |
Paul Fulghum | d4c63b7 | 2007-08-22 14:01:50 -0700 | [diff] [blame] | 1537 | if (!try_module_get(THIS_MODULE)) |
| 1538 | return -EBUSY; |
| 1539 | |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 1540 | DBGINFO(("%s hdlcdev_open\n", dev->name)); |
| 1541 | |
| 1542 | /* generic HDLC layer open processing */ |
| 1543 | if ((rc = hdlc_open(dev))) |
| 1544 | return rc; |
| 1545 | |
| 1546 | /* arbitrate between network and tty opens */ |
| 1547 | spin_lock_irqsave(&info->netlock, flags); |
Alan Cox | 8fb06c7 | 2008-07-16 21:56:46 +0100 | [diff] [blame] | 1548 | if (info->port.count != 0 || info->netcount != 0) { |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 1549 | DBGINFO(("%s hdlc_open busy\n", dev->name)); |
| 1550 | spin_unlock_irqrestore(&info->netlock, flags); |
| 1551 | return -EBUSY; |
| 1552 | } |
| 1553 | info->netcount=1; |
| 1554 | spin_unlock_irqrestore(&info->netlock, flags); |
| 1555 | |
| 1556 | /* claim resources and init adapter */ |
| 1557 | if ((rc = startup(info)) != 0) { |
| 1558 | spin_lock_irqsave(&info->netlock, flags); |
| 1559 | info->netcount=0; |
| 1560 | spin_unlock_irqrestore(&info->netlock, flags); |
| 1561 | return rc; |
| 1562 | } |
| 1563 | |
| 1564 | /* assert DTR and RTS, apply hardware settings */ |
| 1565 | info->signals |= SerialSignal_RTS + SerialSignal_DTR; |
| 1566 | program_hw(info); |
| 1567 | |
| 1568 | /* enable network layer transmit */ |
| 1569 | dev->trans_start = jiffies; |
| 1570 | netif_start_queue(dev); |
| 1571 | |
| 1572 | /* inform generic HDLC layer of current DCD status */ |
| 1573 | spin_lock_irqsave(&info->lock, flags); |
| 1574 | get_signals(info); |
| 1575 | spin_unlock_irqrestore(&info->lock, flags); |
Krzysztof Halasa | fbeff3c | 2006-07-21 14:44:55 -0700 | [diff] [blame] | 1576 | if (info->signals & SerialSignal_DCD) |
| 1577 | netif_carrier_on(dev); |
| 1578 | else |
| 1579 | netif_carrier_off(dev); |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 1580 | return 0; |
| 1581 | } |
| 1582 | |
| 1583 | /** |
| 1584 | * called by network layer when interface is disabled |
| 1585 | * shutdown hardware and release resources |
| 1586 | * |
| 1587 | * dev pointer to network device structure |
| 1588 | * |
| 1589 | * returns 0 if success, otherwise error code |
| 1590 | */ |
| 1591 | static int hdlcdev_close(struct net_device *dev) |
| 1592 | { |
| 1593 | struct slgt_info *info = dev_to_port(dev); |
| 1594 | unsigned long flags; |
| 1595 | |
| 1596 | DBGINFO(("%s hdlcdev_close\n", dev->name)); |
| 1597 | |
| 1598 | netif_stop_queue(dev); |
| 1599 | |
| 1600 | /* shutdown adapter and release resources */ |
| 1601 | shutdown(info); |
| 1602 | |
| 1603 | hdlc_close(dev); |
| 1604 | |
| 1605 | spin_lock_irqsave(&info->netlock, flags); |
| 1606 | info->netcount=0; |
| 1607 | spin_unlock_irqrestore(&info->netlock, flags); |
| 1608 | |
Paul Fulghum | d4c63b7 | 2007-08-22 14:01:50 -0700 | [diff] [blame] | 1609 | module_put(THIS_MODULE); |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 1610 | return 0; |
| 1611 | } |
| 1612 | |
| 1613 | /** |
| 1614 | * called by network layer to process IOCTL call to network device |
| 1615 | * |
| 1616 | * dev pointer to network device structure |
| 1617 | * ifr pointer to network interface request structure |
| 1618 | * cmd IOCTL command code |
| 1619 | * |
| 1620 | * returns 0 if success, otherwise error code |
| 1621 | */ |
| 1622 | static int hdlcdev_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) |
| 1623 | { |
| 1624 | const size_t size = sizeof(sync_serial_settings); |
| 1625 | sync_serial_settings new_line; |
| 1626 | sync_serial_settings __user *line = ifr->ifr_settings.ifs_ifsu.sync; |
| 1627 | struct slgt_info *info = dev_to_port(dev); |
| 1628 | unsigned int flags; |
| 1629 | |
| 1630 | DBGINFO(("%s hdlcdev_ioctl\n", dev->name)); |
| 1631 | |
| 1632 | /* return error if TTY interface open */ |
Alan Cox | 8fb06c7 | 2008-07-16 21:56:46 +0100 | [diff] [blame] | 1633 | if (info->port.count) |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 1634 | return -EBUSY; |
| 1635 | |
| 1636 | if (cmd != SIOCWANDEV) |
| 1637 | return hdlc_ioctl(dev, ifr, cmd); |
| 1638 | |
Vasiliy Kulikov | ed77ed6 | 2010-10-27 15:34:22 -0700 | [diff] [blame] | 1639 | memset(&new_line, 0, sizeof(new_line)); |
| 1640 | |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 1641 | switch(ifr->ifr_settings.type) { |
| 1642 | case IF_GET_IFACE: /* return current sync_serial_settings */ |
| 1643 | |
| 1644 | ifr->ifr_settings.type = IF_IFACE_SYNC_SERIAL; |
| 1645 | if (ifr->ifr_settings.size < size) { |
| 1646 | ifr->ifr_settings.size = size; /* data size wanted */ |
| 1647 | return -ENOBUFS; |
| 1648 | } |
| 1649 | |
| 1650 | flags = info->params.flags & (HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_RXC_DPLL | |
| 1651 | HDLC_FLAG_RXC_BRG | HDLC_FLAG_RXC_TXCPIN | |
| 1652 | HDLC_FLAG_TXC_TXCPIN | HDLC_FLAG_TXC_DPLL | |
| 1653 | HDLC_FLAG_TXC_BRG | HDLC_FLAG_TXC_RXCPIN); |
| 1654 | |
| 1655 | switch (flags){ |
| 1656 | case (HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_TXC_TXCPIN): new_line.clock_type = CLOCK_EXT; break; |
| 1657 | case (HDLC_FLAG_RXC_BRG | HDLC_FLAG_TXC_BRG): new_line.clock_type = CLOCK_INT; break; |
| 1658 | case (HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_TXC_BRG): new_line.clock_type = CLOCK_TXINT; break; |
| 1659 | case (HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_TXC_RXCPIN): new_line.clock_type = CLOCK_TXFROMRX; break; |
| 1660 | default: new_line.clock_type = CLOCK_DEFAULT; |
| 1661 | } |
| 1662 | |
| 1663 | new_line.clock_rate = info->params.clock_speed; |
| 1664 | new_line.loopback = info->params.loopback ? 1:0; |
| 1665 | |
| 1666 | if (copy_to_user(line, &new_line, size)) |
| 1667 | return -EFAULT; |
| 1668 | return 0; |
| 1669 | |
| 1670 | case IF_IFACE_SYNC_SERIAL: /* set sync_serial_settings */ |
| 1671 | |
| 1672 | if(!capable(CAP_NET_ADMIN)) |
| 1673 | return -EPERM; |
| 1674 | if (copy_from_user(&new_line, line, size)) |
| 1675 | return -EFAULT; |
| 1676 | |
| 1677 | switch (new_line.clock_type) |
| 1678 | { |
| 1679 | case CLOCK_EXT: flags = HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_TXC_TXCPIN; break; |
| 1680 | case CLOCK_TXFROMRX: flags = HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_TXC_RXCPIN; break; |
| 1681 | case CLOCK_INT: flags = HDLC_FLAG_RXC_BRG | HDLC_FLAG_TXC_BRG; break; |
| 1682 | case CLOCK_TXINT: flags = HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_TXC_BRG; break; |
| 1683 | case CLOCK_DEFAULT: flags = info->params.flags & |
| 1684 | (HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_RXC_DPLL | |
| 1685 | HDLC_FLAG_RXC_BRG | HDLC_FLAG_RXC_TXCPIN | |
| 1686 | HDLC_FLAG_TXC_TXCPIN | HDLC_FLAG_TXC_DPLL | |
| 1687 | HDLC_FLAG_TXC_BRG | HDLC_FLAG_TXC_RXCPIN); break; |
| 1688 | default: return -EINVAL; |
| 1689 | } |
| 1690 | |
| 1691 | if (new_line.loopback != 0 && new_line.loopback != 1) |
| 1692 | return -EINVAL; |
| 1693 | |
| 1694 | info->params.flags &= ~(HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_RXC_DPLL | |
| 1695 | HDLC_FLAG_RXC_BRG | HDLC_FLAG_RXC_TXCPIN | |
| 1696 | HDLC_FLAG_TXC_TXCPIN | HDLC_FLAG_TXC_DPLL | |
| 1697 | HDLC_FLAG_TXC_BRG | HDLC_FLAG_TXC_RXCPIN); |
| 1698 | info->params.flags |= flags; |
| 1699 | |
| 1700 | info->params.loopback = new_line.loopback; |
| 1701 | |
| 1702 | if (flags & (HDLC_FLAG_RXC_BRG | HDLC_FLAG_TXC_BRG)) |
| 1703 | info->params.clock_speed = new_line.clock_rate; |
| 1704 | else |
| 1705 | info->params.clock_speed = 0; |
| 1706 | |
| 1707 | /* if network interface up, reprogram hardware */ |
| 1708 | if (info->netcount) |
| 1709 | program_hw(info); |
| 1710 | return 0; |
| 1711 | |
| 1712 | default: |
| 1713 | return hdlc_ioctl(dev, ifr, cmd); |
| 1714 | } |
| 1715 | } |
| 1716 | |
| 1717 | /** |
| 1718 | * called by network layer when transmit timeout is detected |
| 1719 | * |
| 1720 | * dev pointer to network device structure |
| 1721 | */ |
| 1722 | static void hdlcdev_tx_timeout(struct net_device *dev) |
| 1723 | { |
| 1724 | struct slgt_info *info = dev_to_port(dev); |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 1725 | unsigned long flags; |
| 1726 | |
| 1727 | DBGINFO(("%s hdlcdev_tx_timeout\n", dev->name)); |
| 1728 | |
Krzysztof Halasa | 198191c | 2008-06-30 23:26:53 +0200 | [diff] [blame] | 1729 | dev->stats.tx_errors++; |
| 1730 | dev->stats.tx_aborted_errors++; |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 1731 | |
| 1732 | spin_lock_irqsave(&info->lock,flags); |
| 1733 | tx_stop(info); |
| 1734 | spin_unlock_irqrestore(&info->lock,flags); |
| 1735 | |
| 1736 | netif_wake_queue(dev); |
| 1737 | } |
| 1738 | |
| 1739 | /** |
| 1740 | * called by device driver when transmit completes |
| 1741 | * reenable network layer transmit if stopped |
| 1742 | * |
| 1743 | * info pointer to device instance information |
| 1744 | */ |
| 1745 | static void hdlcdev_tx_done(struct slgt_info *info) |
| 1746 | { |
| 1747 | if (netif_queue_stopped(info->netdev)) |
| 1748 | netif_wake_queue(info->netdev); |
| 1749 | } |
| 1750 | |
| 1751 | /** |
| 1752 | * called by device driver when frame received |
| 1753 | * pass frame to network layer |
| 1754 | * |
| 1755 | * info pointer to device instance information |
| 1756 | * buf pointer to buffer contianing frame data |
| 1757 | * size count of data bytes in buf |
| 1758 | */ |
| 1759 | static void hdlcdev_rx(struct slgt_info *info, char *buf, int size) |
| 1760 | { |
| 1761 | struct sk_buff *skb = dev_alloc_skb(size); |
| 1762 | struct net_device *dev = info->netdev; |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 1763 | |
| 1764 | DBGINFO(("%s hdlcdev_rx\n", dev->name)); |
| 1765 | |
| 1766 | if (skb == NULL) { |
| 1767 | DBGERR(("%s: can't alloc skb, drop packet\n", dev->name)); |
Krzysztof Halasa | 198191c | 2008-06-30 23:26:53 +0200 | [diff] [blame] | 1768 | dev->stats.rx_dropped++; |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 1769 | return; |
| 1770 | } |
| 1771 | |
Krzysztof Halasa | 198191c | 2008-06-30 23:26:53 +0200 | [diff] [blame] | 1772 | memcpy(skb_put(skb, size), buf, size); |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 1773 | |
Krzysztof Halasa | 198191c | 2008-06-30 23:26:53 +0200 | [diff] [blame] | 1774 | skb->protocol = hdlc_type_trans(skb, dev); |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 1775 | |
Krzysztof Halasa | 198191c | 2008-06-30 23:26:53 +0200 | [diff] [blame] | 1776 | dev->stats.rx_packets++; |
| 1777 | dev->stats.rx_bytes += size; |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 1778 | |
| 1779 | netif_rx(skb); |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 1780 | } |
| 1781 | |
Krzysztof Hałasa | 991990a | 2009-01-08 22:52:11 +0100 | [diff] [blame] | 1782 | static const struct net_device_ops hdlcdev_ops = { |
| 1783 | .ndo_open = hdlcdev_open, |
| 1784 | .ndo_stop = hdlcdev_close, |
| 1785 | .ndo_change_mtu = hdlc_change_mtu, |
| 1786 | .ndo_start_xmit = hdlc_start_xmit, |
| 1787 | .ndo_do_ioctl = hdlcdev_ioctl, |
| 1788 | .ndo_tx_timeout = hdlcdev_tx_timeout, |
| 1789 | }; |
| 1790 | |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 1791 | /** |
| 1792 | * called by device driver when adding device instance |
| 1793 | * do generic HDLC initialization |
| 1794 | * |
| 1795 | * info pointer to device instance information |
| 1796 | * |
| 1797 | * returns 0 if success, otherwise error code |
| 1798 | */ |
| 1799 | static int hdlcdev_init(struct slgt_info *info) |
| 1800 | { |
| 1801 | int rc; |
| 1802 | struct net_device *dev; |
| 1803 | hdlc_device *hdlc; |
| 1804 | |
| 1805 | /* allocate and initialize network and HDLC layer objects */ |
| 1806 | |
| 1807 | if (!(dev = alloc_hdlcdev(info))) { |
| 1808 | printk(KERN_ERR "%s hdlc device alloc failure\n", info->device_name); |
| 1809 | return -ENOMEM; |
| 1810 | } |
| 1811 | |
| 1812 | /* for network layer reporting purposes only */ |
| 1813 | dev->mem_start = info->phys_reg_addr; |
| 1814 | dev->mem_end = info->phys_reg_addr + SLGT_REG_SIZE - 1; |
| 1815 | dev->irq = info->irq_level; |
| 1816 | |
| 1817 | /* network layer callbacks and settings */ |
Krzysztof Hałasa | 991990a | 2009-01-08 22:52:11 +0100 | [diff] [blame] | 1818 | dev->netdev_ops = &hdlcdev_ops; |
| 1819 | dev->watchdog_timeo = 10 * HZ; |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 1820 | dev->tx_queue_len = 50; |
| 1821 | |
| 1822 | /* generic HDLC layer callbacks and settings */ |
| 1823 | hdlc = dev_to_hdlc(dev); |
| 1824 | hdlc->attach = hdlcdev_attach; |
| 1825 | hdlc->xmit = hdlcdev_xmit; |
| 1826 | |
| 1827 | /* register objects with HDLC layer */ |
| 1828 | if ((rc = register_hdlc_device(dev))) { |
| 1829 | printk(KERN_WARNING "%s:unable to register hdlc device\n",__FILE__); |
| 1830 | free_netdev(dev); |
| 1831 | return rc; |
| 1832 | } |
| 1833 | |
| 1834 | info->netdev = dev; |
| 1835 | return 0; |
| 1836 | } |
| 1837 | |
| 1838 | /** |
| 1839 | * called by device driver when removing device instance |
| 1840 | * do generic HDLC cleanup |
| 1841 | * |
| 1842 | * info pointer to device instance information |
| 1843 | */ |
| 1844 | static void hdlcdev_exit(struct slgt_info *info) |
| 1845 | { |
| 1846 | unregister_hdlc_device(info->netdev); |
| 1847 | free_netdev(info->netdev); |
| 1848 | info->netdev = NULL; |
| 1849 | } |
| 1850 | |
| 1851 | #endif /* ifdef CONFIG_HDLC */ |
| 1852 | |
| 1853 | /* |
| 1854 | * get async data from rx DMA buffers |
| 1855 | */ |
| 1856 | static void rx_async(struct slgt_info *info) |
| 1857 | { |
Alan Cox | 8fb06c7 | 2008-07-16 21:56:46 +0100 | [diff] [blame] | 1858 | struct tty_struct *tty = info->port.tty; |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 1859 | struct mgsl_icount *icount = &info->icount; |
| 1860 | unsigned int start, end; |
| 1861 | unsigned char *p; |
| 1862 | unsigned char status; |
| 1863 | struct slgt_desc *bufs = info->rbufs; |
| 1864 | int i, count; |
Alan Cox | 33f0f88 | 2006-01-09 20:54:13 -0800 | [diff] [blame] | 1865 | int chars = 0; |
| 1866 | int stat; |
| 1867 | unsigned char ch; |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 1868 | |
| 1869 | start = end = info->rbuf_current; |
| 1870 | |
| 1871 | while(desc_complete(bufs[end])) { |
| 1872 | count = desc_count(bufs[end]) - info->rbuf_index; |
| 1873 | p = bufs[end].buf + info->rbuf_index; |
| 1874 | |
| 1875 | DBGISR(("%s rx_async count=%d\n", info->device_name, count)); |
| 1876 | DBGDATA(info, p, count, "rx"); |
| 1877 | |
| 1878 | for(i=0 ; i < count; i+=2, p+=2) { |
Alan Cox | 33f0f88 | 2006-01-09 20:54:13 -0800 | [diff] [blame] | 1879 | ch = *p; |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 1880 | icount->rx++; |
| 1881 | |
Alan Cox | 33f0f88 | 2006-01-09 20:54:13 -0800 | [diff] [blame] | 1882 | stat = 0; |
| 1883 | |
Paul Fulghum | 202af6d | 2006-08-31 21:27:36 -0700 | [diff] [blame] | 1884 | if ((status = *(p+1) & (BIT1 + BIT0))) { |
| 1885 | if (status & BIT1) |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 1886 | icount->parity++; |
Paul Fulghum | 202af6d | 2006-08-31 21:27:36 -0700 | [diff] [blame] | 1887 | else if (status & BIT0) |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 1888 | icount->frame++; |
| 1889 | /* discard char if tty control flags say so */ |
| 1890 | if (status & info->ignore_status_mask) |
| 1891 | continue; |
Paul Fulghum | 202af6d | 2006-08-31 21:27:36 -0700 | [diff] [blame] | 1892 | if (status & BIT1) |
Alan Cox | 33f0f88 | 2006-01-09 20:54:13 -0800 | [diff] [blame] | 1893 | stat = TTY_PARITY; |
Paul Fulghum | 202af6d | 2006-08-31 21:27:36 -0700 | [diff] [blame] | 1894 | else if (status & BIT0) |
Alan Cox | 33f0f88 | 2006-01-09 20:54:13 -0800 | [diff] [blame] | 1895 | stat = TTY_FRAME; |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 1896 | } |
| 1897 | if (tty) { |
Alan Cox | 33f0f88 | 2006-01-09 20:54:13 -0800 | [diff] [blame] | 1898 | tty_insert_flip_char(tty, ch, stat); |
| 1899 | chars++; |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 1900 | } |
| 1901 | } |
| 1902 | |
| 1903 | if (i < count) { |
| 1904 | /* receive buffer not completed */ |
| 1905 | info->rbuf_index += i; |
Jiri Slaby | 40565f1 | 2007-02-12 00:52:31 -0800 | [diff] [blame] | 1906 | mod_timer(&info->rx_timer, jiffies + 1); |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 1907 | break; |
| 1908 | } |
| 1909 | |
| 1910 | info->rbuf_index = 0; |
| 1911 | free_rbufs(info, end, end); |
| 1912 | |
| 1913 | if (++end == info->rbuf_count) |
| 1914 | end = 0; |
| 1915 | |
| 1916 | /* if entire list searched then no frame available */ |
| 1917 | if (end == start) |
| 1918 | break; |
| 1919 | } |
| 1920 | |
Alan Cox | 33f0f88 | 2006-01-09 20:54:13 -0800 | [diff] [blame] | 1921 | if (tty && chars) |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 1922 | tty_flip_buffer_push(tty); |
| 1923 | } |
| 1924 | |
| 1925 | /* |
| 1926 | * return next bottom half action to perform |
| 1927 | */ |
| 1928 | static int bh_action(struct slgt_info *info) |
| 1929 | { |
| 1930 | unsigned long flags; |
| 1931 | int rc; |
| 1932 | |
| 1933 | spin_lock_irqsave(&info->lock,flags); |
| 1934 | |
| 1935 | if (info->pending_bh & BH_RECEIVE) { |
| 1936 | info->pending_bh &= ~BH_RECEIVE; |
| 1937 | rc = BH_RECEIVE; |
| 1938 | } else if (info->pending_bh & BH_TRANSMIT) { |
| 1939 | info->pending_bh &= ~BH_TRANSMIT; |
| 1940 | rc = BH_TRANSMIT; |
| 1941 | } else if (info->pending_bh & BH_STATUS) { |
| 1942 | info->pending_bh &= ~BH_STATUS; |
| 1943 | rc = BH_STATUS; |
| 1944 | } else { |
| 1945 | /* Mark BH routine as complete */ |
Joe Perches | 0fab6de | 2008-04-28 02:14:02 -0700 | [diff] [blame] | 1946 | info->bh_running = false; |
| 1947 | info->bh_requested = false; |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 1948 | rc = 0; |
| 1949 | } |
| 1950 | |
| 1951 | spin_unlock_irqrestore(&info->lock,flags); |
| 1952 | |
| 1953 | return rc; |
| 1954 | } |
| 1955 | |
| 1956 | /* |
| 1957 | * perform bottom half processing |
| 1958 | */ |
David Howells | c402895 | 2006-11-22 14:57:56 +0000 | [diff] [blame] | 1959 | static void bh_handler(struct work_struct *work) |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 1960 | { |
David Howells | c402895 | 2006-11-22 14:57:56 +0000 | [diff] [blame] | 1961 | struct slgt_info *info = container_of(work, struct slgt_info, task); |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 1962 | int action; |
| 1963 | |
| 1964 | if (!info) |
| 1965 | return; |
Joe Perches | 0fab6de | 2008-04-28 02:14:02 -0700 | [diff] [blame] | 1966 | info->bh_running = true; |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 1967 | |
| 1968 | while((action = bh_action(info))) { |
| 1969 | switch (action) { |
| 1970 | case BH_RECEIVE: |
| 1971 | DBGBH(("%s bh receive\n", info->device_name)); |
| 1972 | switch(info->params.mode) { |
| 1973 | case MGSL_MODE_ASYNC: |
| 1974 | rx_async(info); |
| 1975 | break; |
| 1976 | case MGSL_MODE_HDLC: |
| 1977 | while(rx_get_frame(info)); |
| 1978 | break; |
| 1979 | case MGSL_MODE_RAW: |
Paul Fulghum | cb10dc9 | 2006-09-30 23:27:45 -0700 | [diff] [blame] | 1980 | case MGSL_MODE_MONOSYNC: |
| 1981 | case MGSL_MODE_BISYNC: |
Paul Fulghum | 9807224 | 2010-10-27 15:34:22 -0700 | [diff] [blame] | 1982 | case MGSL_MODE_XSYNC: |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 1983 | while(rx_get_buf(info)); |
| 1984 | break; |
| 1985 | } |
| 1986 | /* restart receiver if rx DMA buffers exhausted */ |
| 1987 | if (info->rx_restart) |
| 1988 | rx_start(info); |
| 1989 | break; |
| 1990 | case BH_TRANSMIT: |
| 1991 | bh_transmit(info); |
| 1992 | break; |
| 1993 | case BH_STATUS: |
| 1994 | DBGBH(("%s bh status\n", info->device_name)); |
| 1995 | info->ri_chkcount = 0; |
| 1996 | info->dsr_chkcount = 0; |
| 1997 | info->dcd_chkcount = 0; |
| 1998 | info->cts_chkcount = 0; |
| 1999 | break; |
| 2000 | default: |
| 2001 | DBGBH(("%s unknown action\n", info->device_name)); |
| 2002 | break; |
| 2003 | } |
| 2004 | } |
| 2005 | DBGBH(("%s bh_handler exit\n", info->device_name)); |
| 2006 | } |
| 2007 | |
| 2008 | static void bh_transmit(struct slgt_info *info) |
| 2009 | { |
Alan Cox | 8fb06c7 | 2008-07-16 21:56:46 +0100 | [diff] [blame] | 2010 | struct tty_struct *tty = info->port.tty; |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 2011 | |
| 2012 | DBGBH(("%s bh_transmit\n", info->device_name)); |
Jiri Slaby | b963a84 | 2007-02-10 01:44:55 -0800 | [diff] [blame] | 2013 | if (tty) |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 2014 | tty_wakeup(tty); |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 2015 | } |
| 2016 | |
Paul Fulghum | ed8485f | 2008-02-06 01:37:18 -0800 | [diff] [blame] | 2017 | static void dsr_change(struct slgt_info *info, unsigned short status) |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 2018 | { |
Paul Fulghum | ed8485f | 2008-02-06 01:37:18 -0800 | [diff] [blame] | 2019 | if (status & BIT3) { |
| 2020 | info->signals |= SerialSignal_DSR; |
| 2021 | info->input_signal_events.dsr_up++; |
| 2022 | } else { |
| 2023 | info->signals &= ~SerialSignal_DSR; |
| 2024 | info->input_signal_events.dsr_down++; |
| 2025 | } |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 2026 | DBGISR(("dsr_change %s signals=%04X\n", info->device_name, info->signals)); |
| 2027 | if ((info->dsr_chkcount)++ == IO_PIN_SHUTDOWN_LIMIT) { |
| 2028 | slgt_irq_off(info, IRQ_DSR); |
| 2029 | return; |
| 2030 | } |
| 2031 | info->icount.dsr++; |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 2032 | wake_up_interruptible(&info->status_event_wait_q); |
| 2033 | wake_up_interruptible(&info->event_wait_q); |
| 2034 | info->pending_bh |= BH_STATUS; |
| 2035 | } |
| 2036 | |
Paul Fulghum | ed8485f | 2008-02-06 01:37:18 -0800 | [diff] [blame] | 2037 | static void cts_change(struct slgt_info *info, unsigned short status) |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 2038 | { |
Paul Fulghum | ed8485f | 2008-02-06 01:37:18 -0800 | [diff] [blame] | 2039 | if (status & BIT2) { |
| 2040 | info->signals |= SerialSignal_CTS; |
| 2041 | info->input_signal_events.cts_up++; |
| 2042 | } else { |
| 2043 | info->signals &= ~SerialSignal_CTS; |
| 2044 | info->input_signal_events.cts_down++; |
| 2045 | } |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 2046 | DBGISR(("cts_change %s signals=%04X\n", info->device_name, info->signals)); |
| 2047 | if ((info->cts_chkcount)++ == IO_PIN_SHUTDOWN_LIMIT) { |
| 2048 | slgt_irq_off(info, IRQ_CTS); |
| 2049 | return; |
| 2050 | } |
| 2051 | info->icount.cts++; |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 2052 | wake_up_interruptible(&info->status_event_wait_q); |
| 2053 | wake_up_interruptible(&info->event_wait_q); |
| 2054 | info->pending_bh |= BH_STATUS; |
| 2055 | |
Huang Shijie | f21ec3d | 2012-08-22 22:13:36 -0400 | [diff] [blame] | 2056 | if (tty_port_cts_enabled(&info->port)) { |
Alan Cox | 8fb06c7 | 2008-07-16 21:56:46 +0100 | [diff] [blame] | 2057 | if (info->port.tty) { |
| 2058 | if (info->port.tty->hw_stopped) { |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 2059 | if (info->signals & SerialSignal_CTS) { |
Alan Cox | 8fb06c7 | 2008-07-16 21:56:46 +0100 | [diff] [blame] | 2060 | info->port.tty->hw_stopped = 0; |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 2061 | info->pending_bh |= BH_TRANSMIT; |
| 2062 | return; |
| 2063 | } |
| 2064 | } else { |
| 2065 | if (!(info->signals & SerialSignal_CTS)) |
Alan Cox | 8fb06c7 | 2008-07-16 21:56:46 +0100 | [diff] [blame] | 2066 | info->port.tty->hw_stopped = 1; |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 2067 | } |
| 2068 | } |
| 2069 | } |
| 2070 | } |
| 2071 | |
Paul Fulghum | ed8485f | 2008-02-06 01:37:18 -0800 | [diff] [blame] | 2072 | static void dcd_change(struct slgt_info *info, unsigned short status) |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 2073 | { |
Paul Fulghum | ed8485f | 2008-02-06 01:37:18 -0800 | [diff] [blame] | 2074 | if (status & BIT1) { |
| 2075 | info->signals |= SerialSignal_DCD; |
| 2076 | info->input_signal_events.dcd_up++; |
| 2077 | } else { |
| 2078 | info->signals &= ~SerialSignal_DCD; |
| 2079 | info->input_signal_events.dcd_down++; |
| 2080 | } |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 2081 | DBGISR(("dcd_change %s signals=%04X\n", info->device_name, info->signals)); |
| 2082 | if ((info->dcd_chkcount)++ == IO_PIN_SHUTDOWN_LIMIT) { |
| 2083 | slgt_irq_off(info, IRQ_DCD); |
| 2084 | return; |
| 2085 | } |
| 2086 | info->icount.dcd++; |
Paul Fulghum | af69c7f | 2006-12-06 20:40:24 -0800 | [diff] [blame] | 2087 | #if SYNCLINK_GENERIC_HDLC |
Krzysztof Halasa | fbeff3c | 2006-07-21 14:44:55 -0700 | [diff] [blame] | 2088 | if (info->netcount) { |
| 2089 | if (info->signals & SerialSignal_DCD) |
| 2090 | netif_carrier_on(info->netdev); |
| 2091 | else |
| 2092 | netif_carrier_off(info->netdev); |
| 2093 | } |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 2094 | #endif |
| 2095 | wake_up_interruptible(&info->status_event_wait_q); |
| 2096 | wake_up_interruptible(&info->event_wait_q); |
| 2097 | info->pending_bh |= BH_STATUS; |
| 2098 | |
Alan Cox | 8fb06c7 | 2008-07-16 21:56:46 +0100 | [diff] [blame] | 2099 | if (info->port.flags & ASYNC_CHECK_CD) { |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 2100 | if (info->signals & SerialSignal_DCD) |
Alan Cox | 8fb06c7 | 2008-07-16 21:56:46 +0100 | [diff] [blame] | 2101 | wake_up_interruptible(&info->port.open_wait); |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 2102 | else { |
Alan Cox | 8fb06c7 | 2008-07-16 21:56:46 +0100 | [diff] [blame] | 2103 | if (info->port.tty) |
| 2104 | tty_hangup(info->port.tty); |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 2105 | } |
| 2106 | } |
| 2107 | } |
| 2108 | |
Paul Fulghum | ed8485f | 2008-02-06 01:37:18 -0800 | [diff] [blame] | 2109 | static void ri_change(struct slgt_info *info, unsigned short status) |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 2110 | { |
Paul Fulghum | ed8485f | 2008-02-06 01:37:18 -0800 | [diff] [blame] | 2111 | if (status & BIT0) { |
| 2112 | info->signals |= SerialSignal_RI; |
| 2113 | info->input_signal_events.ri_up++; |
| 2114 | } else { |
| 2115 | info->signals &= ~SerialSignal_RI; |
| 2116 | info->input_signal_events.ri_down++; |
| 2117 | } |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 2118 | DBGISR(("ri_change %s signals=%04X\n", info->device_name, info->signals)); |
| 2119 | if ((info->ri_chkcount)++ == IO_PIN_SHUTDOWN_LIMIT) { |
| 2120 | slgt_irq_off(info, IRQ_RI); |
| 2121 | return; |
| 2122 | } |
Paul Fulghum | ed8485f | 2008-02-06 01:37:18 -0800 | [diff] [blame] | 2123 | info->icount.rng++; |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 2124 | wake_up_interruptible(&info->status_event_wait_q); |
| 2125 | wake_up_interruptible(&info->event_wait_q); |
| 2126 | info->pending_bh |= BH_STATUS; |
| 2127 | } |
| 2128 | |
Paul Fulghum | 5ba5a5d | 2009-06-11 12:28:37 +0100 | [diff] [blame] | 2129 | static void isr_rxdata(struct slgt_info *info) |
| 2130 | { |
| 2131 | unsigned int count = info->rbuf_fill_count; |
| 2132 | unsigned int i = info->rbuf_fill_index; |
| 2133 | unsigned short reg; |
| 2134 | |
| 2135 | while (rd_reg16(info, SSR) & IRQ_RXDATA) { |
| 2136 | reg = rd_reg16(info, RDR); |
| 2137 | DBGISR(("isr_rxdata %s RDR=%04X\n", info->device_name, reg)); |
| 2138 | if (desc_complete(info->rbufs[i])) { |
| 2139 | /* all buffers full */ |
| 2140 | rx_stop(info); |
| 2141 | info->rx_restart = 1; |
| 2142 | continue; |
| 2143 | } |
| 2144 | info->rbufs[i].buf[count++] = (unsigned char)reg; |
| 2145 | /* async mode saves status byte to buffer for each data byte */ |
| 2146 | if (info->params.mode == MGSL_MODE_ASYNC) |
| 2147 | info->rbufs[i].buf[count++] = (unsigned char)(reg >> 8); |
| 2148 | if (count == info->rbuf_fill_level || (reg & BIT10)) { |
| 2149 | /* buffer full or end of frame */ |
| 2150 | set_desc_count(info->rbufs[i], count); |
| 2151 | set_desc_status(info->rbufs[i], BIT15 | (reg >> 8)); |
| 2152 | info->rbuf_fill_count = count = 0; |
| 2153 | if (++i == info->rbuf_count) |
| 2154 | i = 0; |
| 2155 | info->pending_bh |= BH_RECEIVE; |
| 2156 | } |
| 2157 | } |
| 2158 | |
| 2159 | info->rbuf_fill_index = i; |
| 2160 | info->rbuf_fill_count = count; |
| 2161 | } |
| 2162 | |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 2163 | static void isr_serial(struct slgt_info *info) |
| 2164 | { |
| 2165 | unsigned short status = rd_reg16(info, SSR); |
| 2166 | |
| 2167 | DBGISR(("%s isr_serial status=%04X\n", info->device_name, status)); |
| 2168 | |
| 2169 | wr_reg16(info, SSR, status); /* clear pending */ |
| 2170 | |
Joe Perches | 0fab6de | 2008-04-28 02:14:02 -0700 | [diff] [blame] | 2171 | info->irq_occurred = true; |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 2172 | |
| 2173 | if (info->params.mode == MGSL_MODE_ASYNC) { |
| 2174 | if (status & IRQ_TXIDLE) { |
Paul Fulghum | de538eb | 2009-12-09 12:31:39 -0800 | [diff] [blame] | 2175 | if (info->tx_active) |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 2176 | isr_txeom(info, status); |
| 2177 | } |
Paul Fulghum | 5ba5a5d | 2009-06-11 12:28:37 +0100 | [diff] [blame] | 2178 | if (info->rx_pio && (status & IRQ_RXDATA)) |
| 2179 | isr_rxdata(info); |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 2180 | if ((status & IRQ_RXBREAK) && (status & RXBREAK)) { |
| 2181 | info->icount.brk++; |
| 2182 | /* process break detection if tty control allows */ |
Alan Cox | 8fb06c7 | 2008-07-16 21:56:46 +0100 | [diff] [blame] | 2183 | if (info->port.tty) { |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 2184 | if (!(status & info->ignore_status_mask)) { |
| 2185 | if (info->read_status_mask & MASK_BREAK) { |
Alan Cox | 8fb06c7 | 2008-07-16 21:56:46 +0100 | [diff] [blame] | 2186 | tty_insert_flip_char(info->port.tty, 0, TTY_BREAK); |
| 2187 | if (info->port.flags & ASYNC_SAK) |
| 2188 | do_SAK(info->port.tty); |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 2189 | } |
| 2190 | } |
| 2191 | } |
| 2192 | } |
| 2193 | } else { |
| 2194 | if (status & (IRQ_TXIDLE + IRQ_TXUNDER)) |
| 2195 | isr_txeom(info, status); |
Paul Fulghum | 5ba5a5d | 2009-06-11 12:28:37 +0100 | [diff] [blame] | 2196 | if (info->rx_pio && (status & IRQ_RXDATA)) |
| 2197 | isr_rxdata(info); |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 2198 | if (status & IRQ_RXIDLE) { |
| 2199 | if (status & RXIDLE) |
| 2200 | info->icount.rxidle++; |
| 2201 | else |
| 2202 | info->icount.exithunt++; |
| 2203 | wake_up_interruptible(&info->event_wait_q); |
| 2204 | } |
| 2205 | |
| 2206 | if (status & IRQ_RXOVER) |
| 2207 | rx_start(info); |
| 2208 | } |
| 2209 | |
| 2210 | if (status & IRQ_DSR) |
Paul Fulghum | ed8485f | 2008-02-06 01:37:18 -0800 | [diff] [blame] | 2211 | dsr_change(info, status); |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 2212 | if (status & IRQ_CTS) |
Paul Fulghum | ed8485f | 2008-02-06 01:37:18 -0800 | [diff] [blame] | 2213 | cts_change(info, status); |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 2214 | if (status & IRQ_DCD) |
Paul Fulghum | ed8485f | 2008-02-06 01:37:18 -0800 | [diff] [blame] | 2215 | dcd_change(info, status); |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 2216 | if (status & IRQ_RI) |
Paul Fulghum | ed8485f | 2008-02-06 01:37:18 -0800 | [diff] [blame] | 2217 | ri_change(info, status); |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 2218 | } |
| 2219 | |
| 2220 | static void isr_rdma(struct slgt_info *info) |
| 2221 | { |
| 2222 | unsigned int status = rd_reg32(info, RDCSR); |
| 2223 | |
| 2224 | DBGISR(("%s isr_rdma status=%08x\n", info->device_name, status)); |
| 2225 | |
| 2226 | /* RDCSR (rx DMA control/status) |
| 2227 | * |
| 2228 | * 31..07 reserved |
| 2229 | * 06 save status byte to DMA buffer |
| 2230 | * 05 error |
| 2231 | * 04 eol (end of list) |
| 2232 | * 03 eob (end of buffer) |
| 2233 | * 02 IRQ enable |
| 2234 | * 01 reset |
| 2235 | * 00 enable |
| 2236 | */ |
| 2237 | wr_reg32(info, RDCSR, status); /* clear pending */ |
| 2238 | |
| 2239 | if (status & (BIT5 + BIT4)) { |
| 2240 | DBGISR(("%s isr_rdma rx_restart=1\n", info->device_name)); |
Joe Perches | 0fab6de | 2008-04-28 02:14:02 -0700 | [diff] [blame] | 2241 | info->rx_restart = true; |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 2242 | } |
| 2243 | info->pending_bh |= BH_RECEIVE; |
| 2244 | } |
| 2245 | |
| 2246 | static void isr_tdma(struct slgt_info *info) |
| 2247 | { |
| 2248 | unsigned int status = rd_reg32(info, TDCSR); |
| 2249 | |
| 2250 | DBGISR(("%s isr_tdma status=%08x\n", info->device_name, status)); |
| 2251 | |
| 2252 | /* TDCSR (tx DMA control/status) |
| 2253 | * |
| 2254 | * 31..06 reserved |
| 2255 | * 05 error |
| 2256 | * 04 eol (end of list) |
| 2257 | * 03 eob (end of buffer) |
| 2258 | * 02 IRQ enable |
| 2259 | * 01 reset |
| 2260 | * 00 enable |
| 2261 | */ |
| 2262 | wr_reg32(info, TDCSR, status); /* clear pending */ |
| 2263 | |
| 2264 | if (status & (BIT5 + BIT4 + BIT3)) { |
| 2265 | // another transmit buffer has completed |
| 2266 | // run bottom half to get more send data from user |
| 2267 | info->pending_bh |= BH_TRANSMIT; |
| 2268 | } |
| 2269 | } |
| 2270 | |
Paul Fulghum | de538eb | 2009-12-09 12:31:39 -0800 | [diff] [blame] | 2271 | /* |
| 2272 | * return true if there are unsent tx DMA buffers, otherwise false |
| 2273 | * |
| 2274 | * if there are unsent buffers then info->tbuf_start |
| 2275 | * is set to index of first unsent buffer |
| 2276 | */ |
| 2277 | static bool unsent_tbufs(struct slgt_info *info) |
| 2278 | { |
| 2279 | unsigned int i = info->tbuf_current; |
| 2280 | bool rc = false; |
| 2281 | |
| 2282 | /* |
| 2283 | * search backwards from last loaded buffer (precedes tbuf_current) |
| 2284 | * for first unsent buffer (desc_count > 0) |
| 2285 | */ |
| 2286 | |
| 2287 | do { |
| 2288 | if (i) |
| 2289 | i--; |
| 2290 | else |
| 2291 | i = info->tbuf_count - 1; |
| 2292 | if (!desc_count(info->tbufs[i])) |
| 2293 | break; |
| 2294 | info->tbuf_start = i; |
| 2295 | rc = true; |
| 2296 | } while (i != info->tbuf_current); |
| 2297 | |
| 2298 | return rc; |
| 2299 | } |
| 2300 | |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 2301 | static void isr_txeom(struct slgt_info *info, unsigned short status) |
| 2302 | { |
| 2303 | DBGISR(("%s txeom status=%04x\n", info->device_name, status)); |
| 2304 | |
| 2305 | slgt_irq_off(info, IRQ_TXDATA + IRQ_TXIDLE + IRQ_TXUNDER); |
| 2306 | tdma_reset(info); |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 2307 | if (status & IRQ_TXUNDER) { |
| 2308 | unsigned short val = rd_reg16(info, TCR); |
| 2309 | wr_reg16(info, TCR, (unsigned short)(val | BIT2)); /* set reset bit */ |
| 2310 | wr_reg16(info, TCR, val); /* clear reset bit */ |
| 2311 | } |
| 2312 | |
| 2313 | if (info->tx_active) { |
| 2314 | if (info->params.mode != MGSL_MODE_ASYNC) { |
| 2315 | if (status & IRQ_TXUNDER) |
| 2316 | info->icount.txunder++; |
| 2317 | else if (status & IRQ_TXIDLE) |
| 2318 | info->icount.txok++; |
| 2319 | } |
| 2320 | |
Paul Fulghum | de538eb | 2009-12-09 12:31:39 -0800 | [diff] [blame] | 2321 | if (unsent_tbufs(info)) { |
| 2322 | tx_start(info); |
| 2323 | update_tx_timer(info); |
| 2324 | return; |
| 2325 | } |
Joe Perches | 0fab6de | 2008-04-28 02:14:02 -0700 | [diff] [blame] | 2326 | info->tx_active = false; |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 2327 | |
| 2328 | del_timer(&info->tx_timer); |
| 2329 | |
| 2330 | if (info->params.mode != MGSL_MODE_ASYNC && info->drop_rts_on_tx_done) { |
| 2331 | info->signals &= ~SerialSignal_RTS; |
Joe Perches | 0fab6de | 2008-04-28 02:14:02 -0700 | [diff] [blame] | 2332 | info->drop_rts_on_tx_done = false; |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 2333 | set_signals(info); |
| 2334 | } |
| 2335 | |
Paul Fulghum | af69c7f | 2006-12-06 20:40:24 -0800 | [diff] [blame] | 2336 | #if SYNCLINK_GENERIC_HDLC |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 2337 | if (info->netcount) |
| 2338 | hdlcdev_tx_done(info); |
| 2339 | else |
| 2340 | #endif |
| 2341 | { |
Alan Cox | 8fb06c7 | 2008-07-16 21:56:46 +0100 | [diff] [blame] | 2342 | if (info->port.tty && (info->port.tty->stopped || info->port.tty->hw_stopped)) { |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 2343 | tx_stop(info); |
| 2344 | return; |
| 2345 | } |
| 2346 | info->pending_bh |= BH_TRANSMIT; |
| 2347 | } |
| 2348 | } |
| 2349 | } |
| 2350 | |
Paul Fulghum | 0080b7a | 2006-03-28 01:56:15 -0800 | [diff] [blame] | 2351 | static void isr_gpio(struct slgt_info *info, unsigned int changed, unsigned int state) |
| 2352 | { |
| 2353 | struct cond_wait *w, *prev; |
| 2354 | |
| 2355 | /* wake processes waiting for specific transitions */ |
| 2356 | for (w = info->gpio_wait_q, prev = NULL ; w != NULL ; w = w->next) { |
| 2357 | if (w->data & changed) { |
| 2358 | w->data = state; |
| 2359 | wake_up_interruptible(&w->q); |
| 2360 | if (prev != NULL) |
| 2361 | prev->next = w->next; |
| 2362 | else |
| 2363 | info->gpio_wait_q = w->next; |
| 2364 | } else |
| 2365 | prev = w; |
| 2366 | } |
| 2367 | } |
| 2368 | |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 2369 | /* interrupt service routine |
| 2370 | * |
| 2371 | * irq interrupt number |
| 2372 | * dev_id device ID supplied during interrupt registration |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 2373 | */ |
Jeff Garzik | a6f97b2 | 2007-10-31 05:20:49 -0400 | [diff] [blame] | 2374 | static irqreturn_t slgt_interrupt(int dummy, void *dev_id) |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 2375 | { |
Jeff Garzik | a6f97b2 | 2007-10-31 05:20:49 -0400 | [diff] [blame] | 2376 | struct slgt_info *info = dev_id; |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 2377 | unsigned int gsr; |
| 2378 | unsigned int i; |
| 2379 | |
Jeff Garzik | a6f97b2 | 2007-10-31 05:20:49 -0400 | [diff] [blame] | 2380 | DBGISR(("slgt_interrupt irq=%d entry\n", info->irq_level)); |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 2381 | |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 2382 | while((gsr = rd_reg32(info, GSR) & 0xffffff00)) { |
| 2383 | DBGISR(("%s gsr=%08x\n", info->device_name, gsr)); |
Joe Perches | 0fab6de | 2008-04-28 02:14:02 -0700 | [diff] [blame] | 2384 | info->irq_occurred = true; |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 2385 | for(i=0; i < info->port_count ; i++) { |
| 2386 | if (info->port_array[i] == NULL) |
| 2387 | continue; |
Paul Fulghum | ffd7d6b | 2010-10-27 15:34:20 -0700 | [diff] [blame] | 2388 | spin_lock(&info->port_array[i]->lock); |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 2389 | if (gsr & (BIT8 << i)) |
| 2390 | isr_serial(info->port_array[i]); |
| 2391 | if (gsr & (BIT16 << (i*2))) |
| 2392 | isr_rdma(info->port_array[i]); |
| 2393 | if (gsr & (BIT17 << (i*2))) |
| 2394 | isr_tdma(info->port_array[i]); |
Paul Fulghum | ffd7d6b | 2010-10-27 15:34:20 -0700 | [diff] [blame] | 2395 | spin_unlock(&info->port_array[i]->lock); |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 2396 | } |
| 2397 | } |
| 2398 | |
Paul Fulghum | 0080b7a | 2006-03-28 01:56:15 -0800 | [diff] [blame] | 2399 | if (info->gpio_present) { |
| 2400 | unsigned int state; |
| 2401 | unsigned int changed; |
Paul Fulghum | ffd7d6b | 2010-10-27 15:34:20 -0700 | [diff] [blame] | 2402 | spin_lock(&info->lock); |
Paul Fulghum | 0080b7a | 2006-03-28 01:56:15 -0800 | [diff] [blame] | 2403 | while ((changed = rd_reg32(info, IOSR)) != 0) { |
| 2404 | DBGISR(("%s iosr=%08x\n", info->device_name, changed)); |
| 2405 | /* read latched state of GPIO signals */ |
| 2406 | state = rd_reg32(info, IOVR); |
| 2407 | /* clear pending GPIO interrupt bits */ |
| 2408 | wr_reg32(info, IOSR, changed); |
| 2409 | for (i=0 ; i < info->port_count ; i++) { |
| 2410 | if (info->port_array[i] != NULL) |
| 2411 | isr_gpio(info->port_array[i], changed, state); |
| 2412 | } |
| 2413 | } |
Paul Fulghum | ffd7d6b | 2010-10-27 15:34:20 -0700 | [diff] [blame] | 2414 | spin_unlock(&info->lock); |
Paul Fulghum | 0080b7a | 2006-03-28 01:56:15 -0800 | [diff] [blame] | 2415 | } |
| 2416 | |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 2417 | for(i=0; i < info->port_count ; i++) { |
| 2418 | struct slgt_info *port = info->port_array[i]; |
Paul Fulghum | ffd7d6b | 2010-10-27 15:34:20 -0700 | [diff] [blame] | 2419 | if (port == NULL) |
| 2420 | continue; |
| 2421 | spin_lock(&port->lock); |
| 2422 | if ((port->port.count || port->netcount) && |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 2423 | port->pending_bh && !port->bh_running && |
| 2424 | !port->bh_requested) { |
| 2425 | DBGISR(("%s bh queued\n", port->device_name)); |
| 2426 | schedule_work(&port->task); |
Joe Perches | 0fab6de | 2008-04-28 02:14:02 -0700 | [diff] [blame] | 2427 | port->bh_requested = true; |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 2428 | } |
Paul Fulghum | ffd7d6b | 2010-10-27 15:34:20 -0700 | [diff] [blame] | 2429 | spin_unlock(&port->lock); |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 2430 | } |
| 2431 | |
Jeff Garzik | a6f97b2 | 2007-10-31 05:20:49 -0400 | [diff] [blame] | 2432 | DBGISR(("slgt_interrupt irq=%d exit\n", info->irq_level)); |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 2433 | return IRQ_HANDLED; |
| 2434 | } |
| 2435 | |
| 2436 | static int startup(struct slgt_info *info) |
| 2437 | { |
| 2438 | DBGINFO(("%s startup\n", info->device_name)); |
| 2439 | |
Alan Cox | 8fb06c7 | 2008-07-16 21:56:46 +0100 | [diff] [blame] | 2440 | if (info->port.flags & ASYNC_INITIALIZED) |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 2441 | return 0; |
| 2442 | |
| 2443 | if (!info->tx_buf) { |
| 2444 | info->tx_buf = kmalloc(info->max_frame_size, GFP_KERNEL); |
| 2445 | if (!info->tx_buf) { |
| 2446 | DBGERR(("%s can't allocate tx buffer\n", info->device_name)); |
| 2447 | return -ENOMEM; |
| 2448 | } |
| 2449 | } |
| 2450 | |
| 2451 | info->pending_bh = 0; |
| 2452 | |
| 2453 | memset(&info->icount, 0, sizeof(info->icount)); |
| 2454 | |
| 2455 | /* program hardware for current parameters */ |
| 2456 | change_params(info); |
| 2457 | |
Alan Cox | 8fb06c7 | 2008-07-16 21:56:46 +0100 | [diff] [blame] | 2458 | if (info->port.tty) |
| 2459 | clear_bit(TTY_IO_ERROR, &info->port.tty->flags); |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 2460 | |
Alan Cox | 8fb06c7 | 2008-07-16 21:56:46 +0100 | [diff] [blame] | 2461 | info->port.flags |= ASYNC_INITIALIZED; |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 2462 | |
| 2463 | return 0; |
| 2464 | } |
| 2465 | |
| 2466 | /* |
| 2467 | * called by close() and hangup() to shutdown hardware |
| 2468 | */ |
| 2469 | static void shutdown(struct slgt_info *info) |
| 2470 | { |
| 2471 | unsigned long flags; |
| 2472 | |
Alan Cox | 8fb06c7 | 2008-07-16 21:56:46 +0100 | [diff] [blame] | 2473 | if (!(info->port.flags & ASYNC_INITIALIZED)) |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 2474 | return; |
| 2475 | |
| 2476 | DBGINFO(("%s shutdown\n", info->device_name)); |
| 2477 | |
| 2478 | /* clear status wait queue because status changes */ |
| 2479 | /* can't happen after shutting down the hardware */ |
| 2480 | wake_up_interruptible(&info->status_event_wait_q); |
| 2481 | wake_up_interruptible(&info->event_wait_q); |
| 2482 | |
| 2483 | del_timer_sync(&info->tx_timer); |
| 2484 | del_timer_sync(&info->rx_timer); |
| 2485 | |
| 2486 | kfree(info->tx_buf); |
| 2487 | info->tx_buf = NULL; |
| 2488 | |
| 2489 | spin_lock_irqsave(&info->lock,flags); |
| 2490 | |
| 2491 | tx_stop(info); |
| 2492 | rx_stop(info); |
| 2493 | |
| 2494 | slgt_irq_off(info, IRQ_ALL | IRQ_MASTER); |
| 2495 | |
Alan Cox | adc8d74 | 2012-07-14 15:31:47 +0100 | [diff] [blame] | 2496 | if (!info->port.tty || info->port.tty->termios.c_cflag & HUPCL) { |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 2497 | info->signals &= ~(SerialSignal_DTR + SerialSignal_RTS); |
| 2498 | set_signals(info); |
| 2499 | } |
| 2500 | |
Paul Fulghum | 0080b7a | 2006-03-28 01:56:15 -0800 | [diff] [blame] | 2501 | flush_cond_wait(&info->gpio_wait_q); |
| 2502 | |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 2503 | spin_unlock_irqrestore(&info->lock,flags); |
| 2504 | |
Alan Cox | 8fb06c7 | 2008-07-16 21:56:46 +0100 | [diff] [blame] | 2505 | if (info->port.tty) |
| 2506 | set_bit(TTY_IO_ERROR, &info->port.tty->flags); |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 2507 | |
Alan Cox | 8fb06c7 | 2008-07-16 21:56:46 +0100 | [diff] [blame] | 2508 | info->port.flags &= ~ASYNC_INITIALIZED; |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 2509 | } |
| 2510 | |
| 2511 | static void program_hw(struct slgt_info *info) |
| 2512 | { |
| 2513 | unsigned long flags; |
| 2514 | |
| 2515 | spin_lock_irqsave(&info->lock,flags); |
| 2516 | |
| 2517 | rx_stop(info); |
| 2518 | tx_stop(info); |
| 2519 | |
Paul Fulghum | cb10dc9 | 2006-09-30 23:27:45 -0700 | [diff] [blame] | 2520 | if (info->params.mode != MGSL_MODE_ASYNC || |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 2521 | info->netcount) |
Paul Fulghum | cb10dc9 | 2006-09-30 23:27:45 -0700 | [diff] [blame] | 2522 | sync_mode(info); |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 2523 | else |
| 2524 | async_mode(info); |
| 2525 | |
| 2526 | set_signals(info); |
| 2527 | |
| 2528 | info->dcd_chkcount = 0; |
| 2529 | info->cts_chkcount = 0; |
| 2530 | info->ri_chkcount = 0; |
| 2531 | info->dsr_chkcount = 0; |
| 2532 | |
Paul Fulghum | a6b2f87 | 2009-01-15 13:50:57 -0800 | [diff] [blame] | 2533 | slgt_irq_on(info, IRQ_DCD | IRQ_CTS | IRQ_DSR | IRQ_RI); |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 2534 | get_signals(info); |
| 2535 | |
| 2536 | if (info->netcount || |
Alan Cox | adc8d74 | 2012-07-14 15:31:47 +0100 | [diff] [blame] | 2537 | (info->port.tty && info->port.tty->termios.c_cflag & CREAD)) |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 2538 | rx_start(info); |
| 2539 | |
| 2540 | spin_unlock_irqrestore(&info->lock,flags); |
| 2541 | } |
| 2542 | |
| 2543 | /* |
| 2544 | * reconfigure adapter based on new parameters |
| 2545 | */ |
| 2546 | static void change_params(struct slgt_info *info) |
| 2547 | { |
| 2548 | unsigned cflag; |
| 2549 | int bits_per_char; |
| 2550 | |
Alan Cox | adc8d74 | 2012-07-14 15:31:47 +0100 | [diff] [blame] | 2551 | if (!info->port.tty) |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 2552 | return; |
| 2553 | DBGINFO(("%s change_params\n", info->device_name)); |
| 2554 | |
Alan Cox | adc8d74 | 2012-07-14 15:31:47 +0100 | [diff] [blame] | 2555 | cflag = info->port.tty->termios.c_cflag; |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 2556 | |
| 2557 | /* if B0 rate (hangup) specified then negate DTR and RTS */ |
| 2558 | /* otherwise assert DTR and RTS */ |
| 2559 | if (cflag & CBAUD) |
| 2560 | info->signals |= SerialSignal_RTS + SerialSignal_DTR; |
| 2561 | else |
| 2562 | info->signals &= ~(SerialSignal_RTS + SerialSignal_DTR); |
| 2563 | |
| 2564 | /* byte size and parity */ |
| 2565 | |
| 2566 | switch (cflag & CSIZE) { |
| 2567 | case CS5: info->params.data_bits = 5; break; |
| 2568 | case CS6: info->params.data_bits = 6; break; |
| 2569 | case CS7: info->params.data_bits = 7; break; |
| 2570 | case CS8: info->params.data_bits = 8; break; |
| 2571 | default: info->params.data_bits = 7; break; |
| 2572 | } |
| 2573 | |
| 2574 | info->params.stop_bits = (cflag & CSTOPB) ? 2 : 1; |
| 2575 | |
| 2576 | if (cflag & PARENB) |
| 2577 | info->params.parity = (cflag & PARODD) ? ASYNC_PARITY_ODD : ASYNC_PARITY_EVEN; |
| 2578 | else |
| 2579 | info->params.parity = ASYNC_PARITY_NONE; |
| 2580 | |
| 2581 | /* calculate number of jiffies to transmit a full |
| 2582 | * FIFO (32 bytes) at specified data rate |
| 2583 | */ |
| 2584 | bits_per_char = info->params.data_bits + |
| 2585 | info->params.stop_bits + 1; |
| 2586 | |
Alan Cox | 8fb06c7 | 2008-07-16 21:56:46 +0100 | [diff] [blame] | 2587 | info->params.data_rate = tty_get_baud_rate(info->port.tty); |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 2588 | |
| 2589 | if (info->params.data_rate) { |
| 2590 | info->timeout = (32*HZ*bits_per_char) / |
| 2591 | info->params.data_rate; |
| 2592 | } |
| 2593 | info->timeout += HZ/50; /* Add .02 seconds of slop */ |
| 2594 | |
| 2595 | if (cflag & CRTSCTS) |
Alan Cox | 8fb06c7 | 2008-07-16 21:56:46 +0100 | [diff] [blame] | 2596 | info->port.flags |= ASYNC_CTS_FLOW; |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 2597 | else |
Alan Cox | 8fb06c7 | 2008-07-16 21:56:46 +0100 | [diff] [blame] | 2598 | info->port.flags &= ~ASYNC_CTS_FLOW; |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 2599 | |
| 2600 | if (cflag & CLOCAL) |
Alan Cox | 8fb06c7 | 2008-07-16 21:56:46 +0100 | [diff] [blame] | 2601 | info->port.flags &= ~ASYNC_CHECK_CD; |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 2602 | else |
Alan Cox | 8fb06c7 | 2008-07-16 21:56:46 +0100 | [diff] [blame] | 2603 | info->port.flags |= ASYNC_CHECK_CD; |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 2604 | |
| 2605 | /* process tty input control flags */ |
| 2606 | |
| 2607 | info->read_status_mask = IRQ_RXOVER; |
Alan Cox | 8fb06c7 | 2008-07-16 21:56:46 +0100 | [diff] [blame] | 2608 | if (I_INPCK(info->port.tty)) |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 2609 | info->read_status_mask |= MASK_PARITY | MASK_FRAMING; |
Alan Cox | 8fb06c7 | 2008-07-16 21:56:46 +0100 | [diff] [blame] | 2610 | if (I_BRKINT(info->port.tty) || I_PARMRK(info->port.tty)) |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 2611 | info->read_status_mask |= MASK_BREAK; |
Alan Cox | 8fb06c7 | 2008-07-16 21:56:46 +0100 | [diff] [blame] | 2612 | if (I_IGNPAR(info->port.tty)) |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 2613 | info->ignore_status_mask |= MASK_PARITY | MASK_FRAMING; |
Alan Cox | 8fb06c7 | 2008-07-16 21:56:46 +0100 | [diff] [blame] | 2614 | if (I_IGNBRK(info->port.tty)) { |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 2615 | info->ignore_status_mask |= MASK_BREAK; |
| 2616 | /* If ignoring parity and break indicators, ignore |
| 2617 | * overruns too. (For real raw support). |
| 2618 | */ |
Alan Cox | 8fb06c7 | 2008-07-16 21:56:46 +0100 | [diff] [blame] | 2619 | if (I_IGNPAR(info->port.tty)) |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 2620 | info->ignore_status_mask |= MASK_OVERRUN; |
| 2621 | } |
| 2622 | |
| 2623 | program_hw(info); |
| 2624 | } |
| 2625 | |
| 2626 | static int get_stats(struct slgt_info *info, struct mgsl_icount __user *user_icount) |
| 2627 | { |
| 2628 | DBGINFO(("%s get_stats\n", info->device_name)); |
| 2629 | if (!user_icount) { |
| 2630 | memset(&info->icount, 0, sizeof(info->icount)); |
| 2631 | } else { |
| 2632 | if (copy_to_user(user_icount, &info->icount, sizeof(struct mgsl_icount))) |
| 2633 | return -EFAULT; |
| 2634 | } |
| 2635 | return 0; |
| 2636 | } |
| 2637 | |
| 2638 | static int get_params(struct slgt_info *info, MGSL_PARAMS __user *user_params) |
| 2639 | { |
| 2640 | DBGINFO(("%s get_params\n", info->device_name)); |
| 2641 | if (copy_to_user(user_params, &info->params, sizeof(MGSL_PARAMS))) |
| 2642 | return -EFAULT; |
| 2643 | return 0; |
| 2644 | } |
| 2645 | |
| 2646 | static int set_params(struct slgt_info *info, MGSL_PARAMS __user *new_params) |
| 2647 | { |
| 2648 | unsigned long flags; |
| 2649 | MGSL_PARAMS tmp_params; |
| 2650 | |
| 2651 | DBGINFO(("%s set_params\n", info->device_name)); |
| 2652 | if (copy_from_user(&tmp_params, new_params, sizeof(MGSL_PARAMS))) |
| 2653 | return -EFAULT; |
| 2654 | |
| 2655 | spin_lock_irqsave(&info->lock, flags); |
Paul Fulghum | 1f80769 | 2009-04-02 16:58:30 -0700 | [diff] [blame] | 2656 | if (tmp_params.mode == MGSL_MODE_BASE_CLOCK) |
| 2657 | info->base_clock = tmp_params.clock_speed; |
| 2658 | else |
| 2659 | memcpy(&info->params, &tmp_params, sizeof(MGSL_PARAMS)); |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 2660 | spin_unlock_irqrestore(&info->lock, flags); |
| 2661 | |
Paul Fulghum | 1f80769 | 2009-04-02 16:58:30 -0700 | [diff] [blame] | 2662 | program_hw(info); |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 2663 | |
| 2664 | return 0; |
| 2665 | } |
| 2666 | |
| 2667 | static int get_txidle(struct slgt_info *info, int __user *idle_mode) |
| 2668 | { |
| 2669 | DBGINFO(("%s get_txidle=%d\n", info->device_name, info->idle_mode)); |
| 2670 | if (put_user(info->idle_mode, idle_mode)) |
| 2671 | return -EFAULT; |
| 2672 | return 0; |
| 2673 | } |
| 2674 | |
| 2675 | static int set_txidle(struct slgt_info *info, int idle_mode) |
| 2676 | { |
| 2677 | unsigned long flags; |
| 2678 | DBGINFO(("%s set_txidle(%d)\n", info->device_name, idle_mode)); |
| 2679 | spin_lock_irqsave(&info->lock,flags); |
| 2680 | info->idle_mode = idle_mode; |
Paul Fulghum | 643f331 | 2006-06-25 05:49:20 -0700 | [diff] [blame] | 2681 | if (info->params.mode != MGSL_MODE_ASYNC) |
| 2682 | tx_set_idle(info); |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 2683 | spin_unlock_irqrestore(&info->lock,flags); |
| 2684 | return 0; |
| 2685 | } |
| 2686 | |
| 2687 | static int tx_enable(struct slgt_info *info, int enable) |
| 2688 | { |
| 2689 | unsigned long flags; |
| 2690 | DBGINFO(("%s tx_enable(%d)\n", info->device_name, enable)); |
| 2691 | spin_lock_irqsave(&info->lock,flags); |
| 2692 | if (enable) { |
| 2693 | if (!info->tx_enabled) |
| 2694 | tx_start(info); |
| 2695 | } else { |
| 2696 | if (info->tx_enabled) |
| 2697 | tx_stop(info); |
| 2698 | } |
| 2699 | spin_unlock_irqrestore(&info->lock,flags); |
| 2700 | return 0; |
| 2701 | } |
| 2702 | |
| 2703 | /* |
| 2704 | * abort transmit HDLC frame |
| 2705 | */ |
| 2706 | static int tx_abort(struct slgt_info *info) |
| 2707 | { |
| 2708 | unsigned long flags; |
| 2709 | DBGINFO(("%s tx_abort\n", info->device_name)); |
| 2710 | spin_lock_irqsave(&info->lock,flags); |
| 2711 | tdma_reset(info); |
| 2712 | spin_unlock_irqrestore(&info->lock,flags); |
| 2713 | return 0; |
| 2714 | } |
| 2715 | |
| 2716 | static int rx_enable(struct slgt_info *info, int enable) |
| 2717 | { |
| 2718 | unsigned long flags; |
Paul Fulghum | 814dae0 | 2008-07-22 11:22:14 +0100 | [diff] [blame] | 2719 | unsigned int rbuf_fill_level; |
| 2720 | DBGINFO(("%s rx_enable(%08x)\n", info->device_name, enable)); |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 2721 | spin_lock_irqsave(&info->lock,flags); |
Paul Fulghum | 814dae0 | 2008-07-22 11:22:14 +0100 | [diff] [blame] | 2722 | /* |
| 2723 | * enable[31..16] = receive DMA buffer fill level |
| 2724 | * 0 = noop (leave fill level unchanged) |
| 2725 | * fill level must be multiple of 4 and <= buffer size |
| 2726 | */ |
| 2727 | rbuf_fill_level = ((unsigned int)enable) >> 16; |
| 2728 | if (rbuf_fill_level) { |
Paul Fulghum | c68a99c | 2008-07-22 11:23:24 +0100 | [diff] [blame] | 2729 | if ((rbuf_fill_level > DMABUFSIZE) || (rbuf_fill_level % 4)) { |
| 2730 | spin_unlock_irqrestore(&info->lock, flags); |
Paul Fulghum | 814dae0 | 2008-07-22 11:22:14 +0100 | [diff] [blame] | 2731 | return -EINVAL; |
Paul Fulghum | c68a99c | 2008-07-22 11:23:24 +0100 | [diff] [blame] | 2732 | } |
Paul Fulghum | 814dae0 | 2008-07-22 11:22:14 +0100 | [diff] [blame] | 2733 | info->rbuf_fill_level = rbuf_fill_level; |
Paul Fulghum | 5ba5a5d | 2009-06-11 12:28:37 +0100 | [diff] [blame] | 2734 | if (rbuf_fill_level < 128) |
| 2735 | info->rx_pio = 1; /* PIO mode */ |
| 2736 | else |
| 2737 | info->rx_pio = 0; /* DMA mode */ |
Paul Fulghum | 814dae0 | 2008-07-22 11:22:14 +0100 | [diff] [blame] | 2738 | rx_stop(info); /* restart receiver to use new fill level */ |
| 2739 | } |
| 2740 | |
| 2741 | /* |
| 2742 | * enable[1..0] = receiver enable command |
| 2743 | * 0 = disable |
| 2744 | * 1 = enable |
| 2745 | * 2 = enable or force hunt mode if already enabled |
| 2746 | */ |
| 2747 | enable &= 3; |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 2748 | if (enable) { |
| 2749 | if (!info->rx_enabled) |
| 2750 | rx_start(info); |
Paul Fulghum | cb10dc9 | 2006-09-30 23:27:45 -0700 | [diff] [blame] | 2751 | else if (enable == 2) { |
| 2752 | /* force hunt mode (write 1 to RCR[3]) */ |
| 2753 | wr_reg16(info, RCR, rd_reg16(info, RCR) | BIT3); |
| 2754 | } |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 2755 | } else { |
| 2756 | if (info->rx_enabled) |
| 2757 | rx_stop(info); |
| 2758 | } |
| 2759 | spin_unlock_irqrestore(&info->lock,flags); |
| 2760 | return 0; |
| 2761 | } |
| 2762 | |
| 2763 | /* |
| 2764 | * wait for specified event to occur |
| 2765 | */ |
| 2766 | static int wait_mgsl_event(struct slgt_info *info, int __user *mask_ptr) |
| 2767 | { |
| 2768 | unsigned long flags; |
| 2769 | int s; |
| 2770 | int rc=0; |
| 2771 | struct mgsl_icount cprev, cnow; |
| 2772 | int events; |
| 2773 | int mask; |
| 2774 | struct _input_signal_events oldsigs, newsigs; |
| 2775 | DECLARE_WAITQUEUE(wait, current); |
| 2776 | |
| 2777 | if (get_user(mask, mask_ptr)) |
| 2778 | return -EFAULT; |
| 2779 | |
| 2780 | DBGINFO(("%s wait_mgsl_event(%d)\n", info->device_name, mask)); |
| 2781 | |
| 2782 | spin_lock_irqsave(&info->lock,flags); |
| 2783 | |
| 2784 | /* return immediately if state matches requested events */ |
| 2785 | get_signals(info); |
| 2786 | s = info->signals; |
| 2787 | |
| 2788 | events = mask & |
| 2789 | ( ((s & SerialSignal_DSR) ? MgslEvent_DsrActive:MgslEvent_DsrInactive) + |
| 2790 | ((s & SerialSignal_DCD) ? MgslEvent_DcdActive:MgslEvent_DcdInactive) + |
| 2791 | ((s & SerialSignal_CTS) ? MgslEvent_CtsActive:MgslEvent_CtsInactive) + |
| 2792 | ((s & SerialSignal_RI) ? MgslEvent_RiActive :MgslEvent_RiInactive) ); |
| 2793 | if (events) { |
| 2794 | spin_unlock_irqrestore(&info->lock,flags); |
| 2795 | goto exit; |
| 2796 | } |
| 2797 | |
| 2798 | /* save current irq counts */ |
| 2799 | cprev = info->icount; |
| 2800 | oldsigs = info->input_signal_events; |
| 2801 | |
| 2802 | /* enable hunt and idle irqs if needed */ |
| 2803 | if (mask & (MgslEvent_ExitHuntMode+MgslEvent_IdleReceived)) { |
| 2804 | unsigned short val = rd_reg16(info, SCR); |
| 2805 | if (!(val & IRQ_RXIDLE)) |
| 2806 | wr_reg16(info, SCR, (unsigned short)(val | IRQ_RXIDLE)); |
| 2807 | } |
| 2808 | |
| 2809 | set_current_state(TASK_INTERRUPTIBLE); |
| 2810 | add_wait_queue(&info->event_wait_q, &wait); |
| 2811 | |
| 2812 | spin_unlock_irqrestore(&info->lock,flags); |
| 2813 | |
| 2814 | for(;;) { |
| 2815 | schedule(); |
| 2816 | if (signal_pending(current)) { |
| 2817 | rc = -ERESTARTSYS; |
| 2818 | break; |
| 2819 | } |
| 2820 | |
| 2821 | /* get current irq counts */ |
| 2822 | spin_lock_irqsave(&info->lock,flags); |
| 2823 | cnow = info->icount; |
| 2824 | newsigs = info->input_signal_events; |
| 2825 | set_current_state(TASK_INTERRUPTIBLE); |
| 2826 | spin_unlock_irqrestore(&info->lock,flags); |
| 2827 | |
| 2828 | /* if no change, wait aborted for some reason */ |
| 2829 | if (newsigs.dsr_up == oldsigs.dsr_up && |
| 2830 | newsigs.dsr_down == oldsigs.dsr_down && |
| 2831 | newsigs.dcd_up == oldsigs.dcd_up && |
| 2832 | newsigs.dcd_down == oldsigs.dcd_down && |
| 2833 | newsigs.cts_up == oldsigs.cts_up && |
| 2834 | newsigs.cts_down == oldsigs.cts_down && |
| 2835 | newsigs.ri_up == oldsigs.ri_up && |
| 2836 | newsigs.ri_down == oldsigs.ri_down && |
| 2837 | cnow.exithunt == cprev.exithunt && |
| 2838 | cnow.rxidle == cprev.rxidle) { |
| 2839 | rc = -EIO; |
| 2840 | break; |
| 2841 | } |
| 2842 | |
| 2843 | events = mask & |
| 2844 | ( (newsigs.dsr_up != oldsigs.dsr_up ? MgslEvent_DsrActive:0) + |
| 2845 | (newsigs.dsr_down != oldsigs.dsr_down ? MgslEvent_DsrInactive:0) + |
| 2846 | (newsigs.dcd_up != oldsigs.dcd_up ? MgslEvent_DcdActive:0) + |
| 2847 | (newsigs.dcd_down != oldsigs.dcd_down ? MgslEvent_DcdInactive:0) + |
| 2848 | (newsigs.cts_up != oldsigs.cts_up ? MgslEvent_CtsActive:0) + |
| 2849 | (newsigs.cts_down != oldsigs.cts_down ? MgslEvent_CtsInactive:0) + |
| 2850 | (newsigs.ri_up != oldsigs.ri_up ? MgslEvent_RiActive:0) + |
| 2851 | (newsigs.ri_down != oldsigs.ri_down ? MgslEvent_RiInactive:0) + |
| 2852 | (cnow.exithunt != cprev.exithunt ? MgslEvent_ExitHuntMode:0) + |
| 2853 | (cnow.rxidle != cprev.rxidle ? MgslEvent_IdleReceived:0) ); |
| 2854 | if (events) |
| 2855 | break; |
| 2856 | |
| 2857 | cprev = cnow; |
| 2858 | oldsigs = newsigs; |
| 2859 | } |
| 2860 | |
| 2861 | remove_wait_queue(&info->event_wait_q, &wait); |
| 2862 | set_current_state(TASK_RUNNING); |
| 2863 | |
| 2864 | |
| 2865 | if (mask & (MgslEvent_ExitHuntMode + MgslEvent_IdleReceived)) { |
| 2866 | spin_lock_irqsave(&info->lock,flags); |
| 2867 | if (!waitqueue_active(&info->event_wait_q)) { |
| 2868 | /* disable enable exit hunt mode/idle rcvd IRQs */ |
| 2869 | wr_reg16(info, SCR, |
| 2870 | (unsigned short)(rd_reg16(info, SCR) & ~IRQ_RXIDLE)); |
| 2871 | } |
| 2872 | spin_unlock_irqrestore(&info->lock,flags); |
| 2873 | } |
| 2874 | exit: |
| 2875 | if (rc == 0) |
| 2876 | rc = put_user(events, mask_ptr); |
| 2877 | return rc; |
| 2878 | } |
| 2879 | |
| 2880 | static int get_interface(struct slgt_info *info, int __user *if_mode) |
| 2881 | { |
| 2882 | DBGINFO(("%s get_interface=%x\n", info->device_name, info->if_mode)); |
| 2883 | if (put_user(info->if_mode, if_mode)) |
| 2884 | return -EFAULT; |
| 2885 | return 0; |
| 2886 | } |
| 2887 | |
| 2888 | static int set_interface(struct slgt_info *info, int if_mode) |
| 2889 | { |
| 2890 | unsigned long flags; |
Paul Fulghum | 35fbd39 | 2006-01-18 17:42:24 -0800 | [diff] [blame] | 2891 | unsigned short val; |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 2892 | |
| 2893 | DBGINFO(("%s set_interface=%x)\n", info->device_name, if_mode)); |
| 2894 | spin_lock_irqsave(&info->lock,flags); |
| 2895 | info->if_mode = if_mode; |
| 2896 | |
| 2897 | msc_set_vcr(info); |
| 2898 | |
| 2899 | /* TCR (tx control) 07 1=RTS driver control */ |
| 2900 | val = rd_reg16(info, TCR); |
| 2901 | if (info->if_mode & MGSL_INTERFACE_RTS_EN) |
| 2902 | val |= BIT7; |
| 2903 | else |
| 2904 | val &= ~BIT7; |
| 2905 | wr_reg16(info, TCR, val); |
| 2906 | |
| 2907 | spin_unlock_irqrestore(&info->lock,flags); |
| 2908 | return 0; |
| 2909 | } |
| 2910 | |
Paul Fulghum | 9807224 | 2010-10-27 15:34:22 -0700 | [diff] [blame] | 2911 | static int get_xsync(struct slgt_info *info, int __user *xsync) |
| 2912 | { |
| 2913 | DBGINFO(("%s get_xsync=%x\n", info->device_name, info->xsync)); |
| 2914 | if (put_user(info->xsync, xsync)) |
| 2915 | return -EFAULT; |
| 2916 | return 0; |
| 2917 | } |
| 2918 | |
| 2919 | /* |
| 2920 | * set extended sync pattern (1 to 4 bytes) for extended sync mode |
| 2921 | * |
| 2922 | * sync pattern is contained in least significant bytes of value |
| 2923 | * most significant byte of sync pattern is oldest (1st sent/detected) |
| 2924 | */ |
| 2925 | static int set_xsync(struct slgt_info *info, int xsync) |
| 2926 | { |
| 2927 | unsigned long flags; |
| 2928 | |
| 2929 | DBGINFO(("%s set_xsync=%x)\n", info->device_name, xsync)); |
| 2930 | spin_lock_irqsave(&info->lock, flags); |
| 2931 | info->xsync = xsync; |
| 2932 | wr_reg32(info, XSR, xsync); |
| 2933 | spin_unlock_irqrestore(&info->lock, flags); |
| 2934 | return 0; |
| 2935 | } |
| 2936 | |
| 2937 | static int get_xctrl(struct slgt_info *info, int __user *xctrl) |
| 2938 | { |
| 2939 | DBGINFO(("%s get_xctrl=%x\n", info->device_name, info->xctrl)); |
| 2940 | if (put_user(info->xctrl, xctrl)) |
| 2941 | return -EFAULT; |
| 2942 | return 0; |
| 2943 | } |
| 2944 | |
| 2945 | /* |
| 2946 | * set extended control options |
| 2947 | * |
| 2948 | * xctrl[31:19] reserved, must be zero |
| 2949 | * xctrl[18:17] extended sync pattern length in bytes |
| 2950 | * 00 = 1 byte in xsr[7:0] |
| 2951 | * 01 = 2 bytes in xsr[15:0] |
| 2952 | * 10 = 3 bytes in xsr[23:0] |
| 2953 | * 11 = 4 bytes in xsr[31:0] |
| 2954 | * xctrl[16] 1 = enable terminal count, 0=disabled |
| 2955 | * xctrl[15:0] receive terminal count for fixed length packets |
| 2956 | * value is count minus one (0 = 1 byte packet) |
| 2957 | * when terminal count is reached, receiver |
| 2958 | * automatically returns to hunt mode and receive |
| 2959 | * FIFO contents are flushed to DMA buffers with |
| 2960 | * end of frame (EOF) status |
| 2961 | */ |
| 2962 | static int set_xctrl(struct slgt_info *info, int xctrl) |
| 2963 | { |
| 2964 | unsigned long flags; |
| 2965 | |
| 2966 | DBGINFO(("%s set_xctrl=%x)\n", info->device_name, xctrl)); |
| 2967 | spin_lock_irqsave(&info->lock, flags); |
| 2968 | info->xctrl = xctrl; |
| 2969 | wr_reg32(info, XCR, xctrl); |
| 2970 | spin_unlock_irqrestore(&info->lock, flags); |
| 2971 | return 0; |
| 2972 | } |
| 2973 | |
Paul Fulghum | 0080b7a | 2006-03-28 01:56:15 -0800 | [diff] [blame] | 2974 | /* |
| 2975 | * set general purpose IO pin state and direction |
| 2976 | * |
| 2977 | * user_gpio fields: |
| 2978 | * state each bit indicates a pin state |
| 2979 | * smask set bit indicates pin state to set |
| 2980 | * dir each bit indicates a pin direction (0=input, 1=output) |
| 2981 | * dmask set bit indicates pin direction to set |
| 2982 | */ |
| 2983 | static int set_gpio(struct slgt_info *info, struct gpio_desc __user *user_gpio) |
| 2984 | { |
| 2985 | unsigned long flags; |
| 2986 | struct gpio_desc gpio; |
| 2987 | __u32 data; |
| 2988 | |
| 2989 | if (!info->gpio_present) |
| 2990 | return -EINVAL; |
| 2991 | if (copy_from_user(&gpio, user_gpio, sizeof(gpio))) |
| 2992 | return -EFAULT; |
| 2993 | DBGINFO(("%s set_gpio state=%08x smask=%08x dir=%08x dmask=%08x\n", |
| 2994 | info->device_name, gpio.state, gpio.smask, |
| 2995 | gpio.dir, gpio.dmask)); |
| 2996 | |
Paul Fulghum | ffd7d6b | 2010-10-27 15:34:20 -0700 | [diff] [blame] | 2997 | spin_lock_irqsave(&info->port_array[0]->lock, flags); |
Paul Fulghum | 0080b7a | 2006-03-28 01:56:15 -0800 | [diff] [blame] | 2998 | if (gpio.dmask) { |
| 2999 | data = rd_reg32(info, IODR); |
| 3000 | data |= gpio.dmask & gpio.dir; |
| 3001 | data &= ~(gpio.dmask & ~gpio.dir); |
| 3002 | wr_reg32(info, IODR, data); |
| 3003 | } |
| 3004 | if (gpio.smask) { |
| 3005 | data = rd_reg32(info, IOVR); |
| 3006 | data |= gpio.smask & gpio.state; |
| 3007 | data &= ~(gpio.smask & ~gpio.state); |
| 3008 | wr_reg32(info, IOVR, data); |
| 3009 | } |
Paul Fulghum | ffd7d6b | 2010-10-27 15:34:20 -0700 | [diff] [blame] | 3010 | spin_unlock_irqrestore(&info->port_array[0]->lock, flags); |
Paul Fulghum | 0080b7a | 2006-03-28 01:56:15 -0800 | [diff] [blame] | 3011 | |
| 3012 | return 0; |
| 3013 | } |
| 3014 | |
| 3015 | /* |
| 3016 | * get general purpose IO pin state and direction |
| 3017 | */ |
| 3018 | static int get_gpio(struct slgt_info *info, struct gpio_desc __user *user_gpio) |
| 3019 | { |
| 3020 | struct gpio_desc gpio; |
| 3021 | if (!info->gpio_present) |
| 3022 | return -EINVAL; |
| 3023 | gpio.state = rd_reg32(info, IOVR); |
| 3024 | gpio.smask = 0xffffffff; |
| 3025 | gpio.dir = rd_reg32(info, IODR); |
| 3026 | gpio.dmask = 0xffffffff; |
| 3027 | if (copy_to_user(user_gpio, &gpio, sizeof(gpio))) |
| 3028 | return -EFAULT; |
| 3029 | DBGINFO(("%s get_gpio state=%08x dir=%08x\n", |
| 3030 | info->device_name, gpio.state, gpio.dir)); |
| 3031 | return 0; |
| 3032 | } |
| 3033 | |
| 3034 | /* |
| 3035 | * conditional wait facility |
| 3036 | */ |
| 3037 | static void init_cond_wait(struct cond_wait *w, unsigned int data) |
| 3038 | { |
| 3039 | init_waitqueue_head(&w->q); |
| 3040 | init_waitqueue_entry(&w->wait, current); |
| 3041 | w->data = data; |
| 3042 | } |
| 3043 | |
| 3044 | static void add_cond_wait(struct cond_wait **head, struct cond_wait *w) |
| 3045 | { |
| 3046 | set_current_state(TASK_INTERRUPTIBLE); |
| 3047 | add_wait_queue(&w->q, &w->wait); |
| 3048 | w->next = *head; |
| 3049 | *head = w; |
| 3050 | } |
| 3051 | |
| 3052 | static void remove_cond_wait(struct cond_wait **head, struct cond_wait *cw) |
| 3053 | { |
| 3054 | struct cond_wait *w, *prev; |
| 3055 | remove_wait_queue(&cw->q, &cw->wait); |
| 3056 | set_current_state(TASK_RUNNING); |
| 3057 | for (w = *head, prev = NULL ; w != NULL ; prev = w, w = w->next) { |
| 3058 | if (w == cw) { |
| 3059 | if (prev != NULL) |
| 3060 | prev->next = w->next; |
| 3061 | else |
| 3062 | *head = w->next; |
| 3063 | break; |
| 3064 | } |
| 3065 | } |
| 3066 | } |
| 3067 | |
| 3068 | static void flush_cond_wait(struct cond_wait **head) |
| 3069 | { |
| 3070 | while (*head != NULL) { |
| 3071 | wake_up_interruptible(&(*head)->q); |
| 3072 | *head = (*head)->next; |
| 3073 | } |
| 3074 | } |
| 3075 | |
| 3076 | /* |
| 3077 | * wait for general purpose I/O pin(s) to enter specified state |
| 3078 | * |
| 3079 | * user_gpio fields: |
| 3080 | * state - bit indicates target pin state |
| 3081 | * smask - set bit indicates watched pin |
| 3082 | * |
| 3083 | * The wait ends when at least one watched pin enters the specified |
| 3084 | * state. When 0 (no error) is returned, user_gpio->state is set to the |
| 3085 | * state of all GPIO pins when the wait ends. |
| 3086 | * |
| 3087 | * Note: Each pin may be a dedicated input, dedicated output, or |
| 3088 | * configurable input/output. The number and configuration of pins |
| 3089 | * varies with the specific adapter model. Only input pins (dedicated |
| 3090 | * or configured) can be monitored with this function. |
| 3091 | */ |
| 3092 | static int wait_gpio(struct slgt_info *info, struct gpio_desc __user *user_gpio) |
| 3093 | { |
| 3094 | unsigned long flags; |
| 3095 | int rc = 0; |
| 3096 | struct gpio_desc gpio; |
| 3097 | struct cond_wait wait; |
| 3098 | u32 state; |
| 3099 | |
| 3100 | if (!info->gpio_present) |
| 3101 | return -EINVAL; |
| 3102 | if (copy_from_user(&gpio, user_gpio, sizeof(gpio))) |
| 3103 | return -EFAULT; |
| 3104 | DBGINFO(("%s wait_gpio() state=%08x smask=%08x\n", |
| 3105 | info->device_name, gpio.state, gpio.smask)); |
| 3106 | /* ignore output pins identified by set IODR bit */ |
| 3107 | if ((gpio.smask &= ~rd_reg32(info, IODR)) == 0) |
| 3108 | return -EINVAL; |
| 3109 | init_cond_wait(&wait, gpio.smask); |
| 3110 | |
Paul Fulghum | ffd7d6b | 2010-10-27 15:34:20 -0700 | [diff] [blame] | 3111 | spin_lock_irqsave(&info->port_array[0]->lock, flags); |
Paul Fulghum | 0080b7a | 2006-03-28 01:56:15 -0800 | [diff] [blame] | 3112 | /* enable interrupts for watched pins */ |
| 3113 | wr_reg32(info, IOER, rd_reg32(info, IOER) | gpio.smask); |
| 3114 | /* get current pin states */ |
| 3115 | state = rd_reg32(info, IOVR); |
| 3116 | |
| 3117 | if (gpio.smask & ~(state ^ gpio.state)) { |
| 3118 | /* already in target state */ |
| 3119 | gpio.state = state; |
| 3120 | } else { |
| 3121 | /* wait for target state */ |
| 3122 | add_cond_wait(&info->gpio_wait_q, &wait); |
Paul Fulghum | ffd7d6b | 2010-10-27 15:34:20 -0700 | [diff] [blame] | 3123 | spin_unlock_irqrestore(&info->port_array[0]->lock, flags); |
Paul Fulghum | 0080b7a | 2006-03-28 01:56:15 -0800 | [diff] [blame] | 3124 | schedule(); |
| 3125 | if (signal_pending(current)) |
| 3126 | rc = -ERESTARTSYS; |
| 3127 | else |
| 3128 | gpio.state = wait.data; |
Paul Fulghum | ffd7d6b | 2010-10-27 15:34:20 -0700 | [diff] [blame] | 3129 | spin_lock_irqsave(&info->port_array[0]->lock, flags); |
Paul Fulghum | 0080b7a | 2006-03-28 01:56:15 -0800 | [diff] [blame] | 3130 | remove_cond_wait(&info->gpio_wait_q, &wait); |
| 3131 | } |
| 3132 | |
| 3133 | /* disable all GPIO interrupts if no waiting processes */ |
| 3134 | if (info->gpio_wait_q == NULL) |
| 3135 | wr_reg32(info, IOER, 0); |
Paul Fulghum | ffd7d6b | 2010-10-27 15:34:20 -0700 | [diff] [blame] | 3136 | spin_unlock_irqrestore(&info->port_array[0]->lock, flags); |
Paul Fulghum | 0080b7a | 2006-03-28 01:56:15 -0800 | [diff] [blame] | 3137 | |
| 3138 | if ((rc == 0) && copy_to_user(user_gpio, &gpio, sizeof(gpio))) |
| 3139 | rc = -EFAULT; |
| 3140 | return rc; |
| 3141 | } |
| 3142 | |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 3143 | static int modem_input_wait(struct slgt_info *info,int arg) |
| 3144 | { |
| 3145 | unsigned long flags; |
| 3146 | int rc; |
| 3147 | struct mgsl_icount cprev, cnow; |
| 3148 | DECLARE_WAITQUEUE(wait, current); |
| 3149 | |
| 3150 | /* save current irq counts */ |
| 3151 | spin_lock_irqsave(&info->lock,flags); |
| 3152 | cprev = info->icount; |
| 3153 | add_wait_queue(&info->status_event_wait_q, &wait); |
| 3154 | set_current_state(TASK_INTERRUPTIBLE); |
| 3155 | spin_unlock_irqrestore(&info->lock,flags); |
| 3156 | |
| 3157 | for(;;) { |
| 3158 | schedule(); |
| 3159 | if (signal_pending(current)) { |
| 3160 | rc = -ERESTARTSYS; |
| 3161 | break; |
| 3162 | } |
| 3163 | |
| 3164 | /* get new irq counts */ |
| 3165 | spin_lock_irqsave(&info->lock,flags); |
| 3166 | cnow = info->icount; |
| 3167 | set_current_state(TASK_INTERRUPTIBLE); |
| 3168 | spin_unlock_irqrestore(&info->lock,flags); |
| 3169 | |
| 3170 | /* if no change, wait aborted for some reason */ |
| 3171 | if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr && |
| 3172 | cnow.dcd == cprev.dcd && cnow.cts == cprev.cts) { |
| 3173 | rc = -EIO; |
| 3174 | break; |
| 3175 | } |
| 3176 | |
| 3177 | /* check for change in caller specified modem input */ |
| 3178 | if ((arg & TIOCM_RNG && cnow.rng != cprev.rng) || |
| 3179 | (arg & TIOCM_DSR && cnow.dsr != cprev.dsr) || |
| 3180 | (arg & TIOCM_CD && cnow.dcd != cprev.dcd) || |
| 3181 | (arg & TIOCM_CTS && cnow.cts != cprev.cts)) { |
| 3182 | rc = 0; |
| 3183 | break; |
| 3184 | } |
| 3185 | |
| 3186 | cprev = cnow; |
| 3187 | } |
| 3188 | remove_wait_queue(&info->status_event_wait_q, &wait); |
| 3189 | set_current_state(TASK_RUNNING); |
| 3190 | return rc; |
| 3191 | } |
| 3192 | |
| 3193 | /* |
| 3194 | * return state of serial control and status signals |
| 3195 | */ |
Alan Cox | 60b33c1 | 2011-02-14 16:26:14 +0000 | [diff] [blame] | 3196 | static int tiocmget(struct tty_struct *tty) |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 3197 | { |
| 3198 | struct slgt_info *info = tty->driver_data; |
| 3199 | unsigned int result; |
| 3200 | unsigned long flags; |
| 3201 | |
| 3202 | spin_lock_irqsave(&info->lock,flags); |
| 3203 | get_signals(info); |
| 3204 | spin_unlock_irqrestore(&info->lock,flags); |
| 3205 | |
| 3206 | result = ((info->signals & SerialSignal_RTS) ? TIOCM_RTS:0) + |
| 3207 | ((info->signals & SerialSignal_DTR) ? TIOCM_DTR:0) + |
| 3208 | ((info->signals & SerialSignal_DCD) ? TIOCM_CAR:0) + |
| 3209 | ((info->signals & SerialSignal_RI) ? TIOCM_RNG:0) + |
| 3210 | ((info->signals & SerialSignal_DSR) ? TIOCM_DSR:0) + |
| 3211 | ((info->signals & SerialSignal_CTS) ? TIOCM_CTS:0); |
| 3212 | |
| 3213 | DBGINFO(("%s tiocmget value=%08X\n", info->device_name, result)); |
| 3214 | return result; |
| 3215 | } |
| 3216 | |
| 3217 | /* |
| 3218 | * set modem control signals (DTR/RTS) |
| 3219 | * |
| 3220 | * cmd signal command: TIOCMBIS = set bit TIOCMBIC = clear bit |
| 3221 | * TIOCMSET = set/clear signal values |
| 3222 | * value bit mask for command |
| 3223 | */ |
Alan Cox | 20b9d17 | 2011-02-14 16:26:50 +0000 | [diff] [blame] | 3224 | static int tiocmset(struct tty_struct *tty, |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 3225 | unsigned int set, unsigned int clear) |
| 3226 | { |
| 3227 | struct slgt_info *info = tty->driver_data; |
| 3228 | unsigned long flags; |
| 3229 | |
| 3230 | DBGINFO(("%s tiocmset(%x,%x)\n", info->device_name, set, clear)); |
| 3231 | |
| 3232 | if (set & TIOCM_RTS) |
| 3233 | info->signals |= SerialSignal_RTS; |
| 3234 | if (set & TIOCM_DTR) |
| 3235 | info->signals |= SerialSignal_DTR; |
| 3236 | if (clear & TIOCM_RTS) |
| 3237 | info->signals &= ~SerialSignal_RTS; |
| 3238 | if (clear & TIOCM_DTR) |
| 3239 | info->signals &= ~SerialSignal_DTR; |
| 3240 | |
| 3241 | spin_lock_irqsave(&info->lock,flags); |
| 3242 | set_signals(info); |
| 3243 | spin_unlock_irqrestore(&info->lock,flags); |
| 3244 | return 0; |
| 3245 | } |
| 3246 | |
Alan Cox | 31f3593 | 2009-01-02 13:45:05 +0000 | [diff] [blame] | 3247 | static int carrier_raised(struct tty_port *port) |
| 3248 | { |
| 3249 | unsigned long flags; |
| 3250 | struct slgt_info *info = container_of(port, struct slgt_info, port); |
| 3251 | |
| 3252 | spin_lock_irqsave(&info->lock,flags); |
| 3253 | get_signals(info); |
| 3254 | spin_unlock_irqrestore(&info->lock,flags); |
| 3255 | return (info->signals & SerialSignal_DCD) ? 1 : 0; |
| 3256 | } |
| 3257 | |
Alan Cox | fcc8ac1 | 2009-06-11 12:24:17 +0100 | [diff] [blame] | 3258 | static void dtr_rts(struct tty_port *port, int on) |
Alan Cox | 5d951fb | 2009-01-02 13:45:19 +0000 | [diff] [blame] | 3259 | { |
| 3260 | unsigned long flags; |
| 3261 | struct slgt_info *info = container_of(port, struct slgt_info, port); |
| 3262 | |
| 3263 | spin_lock_irqsave(&info->lock,flags); |
Alan Cox | fcc8ac1 | 2009-06-11 12:24:17 +0100 | [diff] [blame] | 3264 | if (on) |
| 3265 | info->signals |= SerialSignal_RTS + SerialSignal_DTR; |
| 3266 | else |
| 3267 | info->signals &= ~(SerialSignal_RTS + SerialSignal_DTR); |
Alan Cox | 5d951fb | 2009-01-02 13:45:19 +0000 | [diff] [blame] | 3268 | set_signals(info); |
| 3269 | spin_unlock_irqrestore(&info->lock,flags); |
| 3270 | } |
| 3271 | |
| 3272 | |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 3273 | /* |
| 3274 | * block current process until the device is ready to open |
| 3275 | */ |
| 3276 | static int block_til_ready(struct tty_struct *tty, struct file *filp, |
| 3277 | struct slgt_info *info) |
| 3278 | { |
| 3279 | DECLARE_WAITQUEUE(wait, current); |
| 3280 | int retval; |
Joe Perches | 0fab6de | 2008-04-28 02:14:02 -0700 | [diff] [blame] | 3281 | bool do_clocal = false; |
| 3282 | bool extra_count = false; |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 3283 | unsigned long flags; |
Alan Cox | 31f3593 | 2009-01-02 13:45:05 +0000 | [diff] [blame] | 3284 | int cd; |
| 3285 | struct tty_port *port = &info->port; |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 3286 | |
| 3287 | DBGINFO(("%s block_til_ready\n", tty->driver->name)); |
| 3288 | |
| 3289 | if (filp->f_flags & O_NONBLOCK || tty->flags & (1 << TTY_IO_ERROR)){ |
| 3290 | /* nonblock mode is set or port is not enabled */ |
Alan Cox | 31f3593 | 2009-01-02 13:45:05 +0000 | [diff] [blame] | 3291 | port->flags |= ASYNC_NORMAL_ACTIVE; |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 3292 | return 0; |
| 3293 | } |
| 3294 | |
Alan Cox | adc8d74 | 2012-07-14 15:31:47 +0100 | [diff] [blame] | 3295 | if (tty->termios.c_cflag & CLOCAL) |
Joe Perches | 0fab6de | 2008-04-28 02:14:02 -0700 | [diff] [blame] | 3296 | do_clocal = true; |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 3297 | |
| 3298 | /* Wait for carrier detect and the line to become |
| 3299 | * free (i.e., not in use by the callout). While we are in |
Alan Cox | 31f3593 | 2009-01-02 13:45:05 +0000 | [diff] [blame] | 3300 | * this loop, port->count is dropped by one, so that |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 3301 | * close() knows when to free things. We restore it upon |
| 3302 | * exit, either normal or abnormal. |
| 3303 | */ |
| 3304 | |
| 3305 | retval = 0; |
Alan Cox | 31f3593 | 2009-01-02 13:45:05 +0000 | [diff] [blame] | 3306 | add_wait_queue(&port->open_wait, &wait); |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 3307 | |
| 3308 | spin_lock_irqsave(&info->lock, flags); |
| 3309 | if (!tty_hung_up_p(filp)) { |
Joe Perches | 0fab6de | 2008-04-28 02:14:02 -0700 | [diff] [blame] | 3310 | extra_count = true; |
Alan Cox | 31f3593 | 2009-01-02 13:45:05 +0000 | [diff] [blame] | 3311 | port->count--; |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 3312 | } |
| 3313 | spin_unlock_irqrestore(&info->lock, flags); |
Alan Cox | 31f3593 | 2009-01-02 13:45:05 +0000 | [diff] [blame] | 3314 | port->blocked_open++; |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 3315 | |
| 3316 | while (1) { |
Alan Cox | adc8d74 | 2012-07-14 15:31:47 +0100 | [diff] [blame] | 3317 | if ((tty->termios.c_cflag & CBAUD)) |
Alan Cox | 5d951fb | 2009-01-02 13:45:19 +0000 | [diff] [blame] | 3318 | tty_port_raise_dtr_rts(port); |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 3319 | |
| 3320 | set_current_state(TASK_INTERRUPTIBLE); |
| 3321 | |
Alan Cox | 31f3593 | 2009-01-02 13:45:05 +0000 | [diff] [blame] | 3322 | if (tty_hung_up_p(filp) || !(port->flags & ASYNC_INITIALIZED)){ |
| 3323 | retval = (port->flags & ASYNC_HUP_NOTIFY) ? |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 3324 | -EAGAIN : -ERESTARTSYS; |
| 3325 | break; |
| 3326 | } |
| 3327 | |
Alan Cox | 31f3593 | 2009-01-02 13:45:05 +0000 | [diff] [blame] | 3328 | cd = tty_port_carrier_raised(port); |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 3329 | |
Alan Cox | 31f3593 | 2009-01-02 13:45:05 +0000 | [diff] [blame] | 3330 | if (!(port->flags & ASYNC_CLOSING) && (do_clocal || cd )) |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 3331 | break; |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 3332 | |
| 3333 | if (signal_pending(current)) { |
| 3334 | retval = -ERESTARTSYS; |
| 3335 | break; |
| 3336 | } |
| 3337 | |
| 3338 | DBGINFO(("%s block_til_ready wait\n", tty->driver->name)); |
Alan Cox | 89c8d91 | 2012-08-08 16:30:13 +0100 | [diff] [blame] | 3339 | tty_unlock(tty); |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 3340 | schedule(); |
Alan Cox | 89c8d91 | 2012-08-08 16:30:13 +0100 | [diff] [blame] | 3341 | tty_lock(tty); |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 3342 | } |
| 3343 | |
| 3344 | set_current_state(TASK_RUNNING); |
Alan Cox | 31f3593 | 2009-01-02 13:45:05 +0000 | [diff] [blame] | 3345 | remove_wait_queue(&port->open_wait, &wait); |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 3346 | |
| 3347 | if (extra_count) |
Alan Cox | 31f3593 | 2009-01-02 13:45:05 +0000 | [diff] [blame] | 3348 | port->count++; |
| 3349 | port->blocked_open--; |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 3350 | |
| 3351 | if (!retval) |
Alan Cox | 31f3593 | 2009-01-02 13:45:05 +0000 | [diff] [blame] | 3352 | port->flags |= ASYNC_NORMAL_ACTIVE; |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 3353 | |
| 3354 | DBGINFO(("%s block_til_ready ready, rc=%d\n", tty->driver->name, retval)); |
| 3355 | return retval; |
| 3356 | } |
| 3357 | |
| 3358 | static int alloc_tmp_rbuf(struct slgt_info *info) |
| 3359 | { |
Paul Fulghum | 04b374d | 2006-06-25 05:49:21 -0700 | [diff] [blame] | 3360 | info->tmp_rbuf = kmalloc(info->max_frame_size + 5, GFP_KERNEL); |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 3361 | if (info->tmp_rbuf == NULL) |
| 3362 | return -ENOMEM; |
| 3363 | return 0; |
| 3364 | } |
| 3365 | |
| 3366 | static void free_tmp_rbuf(struct slgt_info *info) |
| 3367 | { |
| 3368 | kfree(info->tmp_rbuf); |
| 3369 | info->tmp_rbuf = NULL; |
| 3370 | } |
| 3371 | |
| 3372 | /* |
| 3373 | * allocate DMA descriptor lists. |
| 3374 | */ |
| 3375 | static int alloc_desc(struct slgt_info *info) |
| 3376 | { |
| 3377 | unsigned int i; |
| 3378 | unsigned int pbufs; |
| 3379 | |
| 3380 | /* allocate memory to hold descriptor lists */ |
| 3381 | info->bufs = pci_alloc_consistent(info->pdev, DESC_LIST_SIZE, &info->bufs_dma_addr); |
| 3382 | if (info->bufs == NULL) |
| 3383 | return -ENOMEM; |
| 3384 | |
| 3385 | memset(info->bufs, 0, DESC_LIST_SIZE); |
| 3386 | |
| 3387 | info->rbufs = (struct slgt_desc*)info->bufs; |
| 3388 | info->tbufs = ((struct slgt_desc*)info->bufs) + info->rbuf_count; |
| 3389 | |
| 3390 | pbufs = (unsigned int)info->bufs_dma_addr; |
| 3391 | |
| 3392 | /* |
| 3393 | * Build circular lists of descriptors |
| 3394 | */ |
| 3395 | |
| 3396 | for (i=0; i < info->rbuf_count; i++) { |
| 3397 | /* physical address of this descriptor */ |
| 3398 | info->rbufs[i].pdesc = pbufs + (i * sizeof(struct slgt_desc)); |
| 3399 | |
| 3400 | /* physical address of next descriptor */ |
| 3401 | if (i == info->rbuf_count - 1) |
| 3402 | info->rbufs[i].next = cpu_to_le32(pbufs); |
| 3403 | else |
| 3404 | info->rbufs[i].next = cpu_to_le32(pbufs + ((i+1) * sizeof(struct slgt_desc))); |
| 3405 | set_desc_count(info->rbufs[i], DMABUFSIZE); |
| 3406 | } |
| 3407 | |
| 3408 | for (i=0; i < info->tbuf_count; i++) { |
| 3409 | /* physical address of this descriptor */ |
| 3410 | info->tbufs[i].pdesc = pbufs + ((info->rbuf_count + i) * sizeof(struct slgt_desc)); |
| 3411 | |
| 3412 | /* physical address of next descriptor */ |
| 3413 | if (i == info->tbuf_count - 1) |
| 3414 | info->tbufs[i].next = cpu_to_le32(pbufs + info->rbuf_count * sizeof(struct slgt_desc)); |
| 3415 | else |
| 3416 | info->tbufs[i].next = cpu_to_le32(pbufs + ((info->rbuf_count + i + 1) * sizeof(struct slgt_desc))); |
| 3417 | } |
| 3418 | |
| 3419 | return 0; |
| 3420 | } |
| 3421 | |
| 3422 | static void free_desc(struct slgt_info *info) |
| 3423 | { |
| 3424 | if (info->bufs != NULL) { |
| 3425 | pci_free_consistent(info->pdev, DESC_LIST_SIZE, info->bufs, info->bufs_dma_addr); |
| 3426 | info->bufs = NULL; |
| 3427 | info->rbufs = NULL; |
| 3428 | info->tbufs = NULL; |
| 3429 | } |
| 3430 | } |
| 3431 | |
| 3432 | static int alloc_bufs(struct slgt_info *info, struct slgt_desc *bufs, int count) |
| 3433 | { |
| 3434 | int i; |
| 3435 | for (i=0; i < count; i++) { |
| 3436 | if ((bufs[i].buf = pci_alloc_consistent(info->pdev, DMABUFSIZE, &bufs[i].buf_dma_addr)) == NULL) |
| 3437 | return -ENOMEM; |
| 3438 | bufs[i].pbuf = cpu_to_le32((unsigned int)bufs[i].buf_dma_addr); |
| 3439 | } |
| 3440 | return 0; |
| 3441 | } |
| 3442 | |
| 3443 | static void free_bufs(struct slgt_info *info, struct slgt_desc *bufs, int count) |
| 3444 | { |
| 3445 | int i; |
| 3446 | for (i=0; i < count; i++) { |
| 3447 | if (bufs[i].buf == NULL) |
| 3448 | continue; |
| 3449 | pci_free_consistent(info->pdev, DMABUFSIZE, bufs[i].buf, bufs[i].buf_dma_addr); |
| 3450 | bufs[i].buf = NULL; |
| 3451 | } |
| 3452 | } |
| 3453 | |
| 3454 | static int alloc_dma_bufs(struct slgt_info *info) |
| 3455 | { |
| 3456 | info->rbuf_count = 32; |
| 3457 | info->tbuf_count = 32; |
| 3458 | |
| 3459 | if (alloc_desc(info) < 0 || |
| 3460 | alloc_bufs(info, info->rbufs, info->rbuf_count) < 0 || |
| 3461 | alloc_bufs(info, info->tbufs, info->tbuf_count) < 0 || |
| 3462 | alloc_tmp_rbuf(info) < 0) { |
| 3463 | DBGERR(("%s DMA buffer alloc fail\n", info->device_name)); |
| 3464 | return -ENOMEM; |
| 3465 | } |
| 3466 | reset_rbufs(info); |
| 3467 | return 0; |
| 3468 | } |
| 3469 | |
| 3470 | static void free_dma_bufs(struct slgt_info *info) |
| 3471 | { |
| 3472 | if (info->bufs) { |
| 3473 | free_bufs(info, info->rbufs, info->rbuf_count); |
| 3474 | free_bufs(info, info->tbufs, info->tbuf_count); |
| 3475 | free_desc(info); |
| 3476 | } |
| 3477 | free_tmp_rbuf(info); |
| 3478 | } |
| 3479 | |
| 3480 | static int claim_resources(struct slgt_info *info) |
| 3481 | { |
| 3482 | if (request_mem_region(info->phys_reg_addr, SLGT_REG_SIZE, "synclink_gt") == NULL) { |
| 3483 | DBGERR(("%s reg addr conflict, addr=%08X\n", |
| 3484 | info->device_name, info->phys_reg_addr)); |
| 3485 | info->init_error = DiagStatus_AddressConflict; |
| 3486 | goto errout; |
| 3487 | } |
| 3488 | else |
Joe Perches | 0fab6de | 2008-04-28 02:14:02 -0700 | [diff] [blame] | 3489 | info->reg_addr_requested = true; |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 3490 | |
Alan Cox | 24cb233 | 2008-04-30 00:54:19 -0700 | [diff] [blame] | 3491 | info->reg_addr = ioremap_nocache(info->phys_reg_addr, SLGT_REG_SIZE); |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 3492 | if (!info->reg_addr) { |
Lucas De Marchi | 25985ed | 2011-03-30 22:57:33 -0300 | [diff] [blame] | 3493 | DBGERR(("%s can't map device registers, addr=%08X\n", |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 3494 | info->device_name, info->phys_reg_addr)); |
| 3495 | info->init_error = DiagStatus_CantAssignPciResources; |
| 3496 | goto errout; |
| 3497 | } |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 3498 | return 0; |
| 3499 | |
| 3500 | errout: |
| 3501 | release_resources(info); |
| 3502 | return -ENODEV; |
| 3503 | } |
| 3504 | |
| 3505 | static void release_resources(struct slgt_info *info) |
| 3506 | { |
| 3507 | if (info->irq_requested) { |
| 3508 | free_irq(info->irq_level, info); |
Joe Perches | 0fab6de | 2008-04-28 02:14:02 -0700 | [diff] [blame] | 3509 | info->irq_requested = false; |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 3510 | } |
| 3511 | |
| 3512 | if (info->reg_addr_requested) { |
| 3513 | release_mem_region(info->phys_reg_addr, SLGT_REG_SIZE); |
Joe Perches | 0fab6de | 2008-04-28 02:14:02 -0700 | [diff] [blame] | 3514 | info->reg_addr_requested = false; |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 3515 | } |
| 3516 | |
| 3517 | if (info->reg_addr) { |
Paul Fulghum | 0c8365e | 2006-01-11 12:17:39 -0800 | [diff] [blame] | 3518 | iounmap(info->reg_addr); |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 3519 | info->reg_addr = NULL; |
| 3520 | } |
| 3521 | } |
| 3522 | |
| 3523 | /* Add the specified device instance data structure to the |
| 3524 | * global linked list of devices and increment the device count. |
| 3525 | */ |
| 3526 | static void add_device(struct slgt_info *info) |
| 3527 | { |
| 3528 | char *devstr; |
| 3529 | |
| 3530 | info->next_device = NULL; |
| 3531 | info->line = slgt_device_count; |
| 3532 | sprintf(info->device_name, "%s%d", tty_dev_prefix, info->line); |
| 3533 | |
| 3534 | if (info->line < MAX_DEVICES) { |
| 3535 | if (maxframe[info->line]) |
| 3536 | info->max_frame_size = maxframe[info->line]; |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 3537 | } |
| 3538 | |
| 3539 | slgt_device_count++; |
| 3540 | |
| 3541 | if (!slgt_device_list) |
| 3542 | slgt_device_list = info; |
| 3543 | else { |
| 3544 | struct slgt_info *current_dev = slgt_device_list; |
| 3545 | while(current_dev->next_device) |
| 3546 | current_dev = current_dev->next_device; |
| 3547 | current_dev->next_device = info; |
| 3548 | } |
| 3549 | |
| 3550 | if (info->max_frame_size < 4096) |
| 3551 | info->max_frame_size = 4096; |
| 3552 | else if (info->max_frame_size > 65535) |
| 3553 | info->max_frame_size = 65535; |
| 3554 | |
| 3555 | switch(info->pdev->device) { |
| 3556 | case SYNCLINK_GT_DEVICE_ID: |
| 3557 | devstr = "GT"; |
| 3558 | break; |
Paul Fulghum | 6f84be8 | 2006-06-25 05:49:22 -0700 | [diff] [blame] | 3559 | case SYNCLINK_GT2_DEVICE_ID: |
| 3560 | devstr = "GT2"; |
| 3561 | break; |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 3562 | case SYNCLINK_GT4_DEVICE_ID: |
| 3563 | devstr = "GT4"; |
| 3564 | break; |
| 3565 | case SYNCLINK_AC_DEVICE_ID: |
| 3566 | devstr = "AC"; |
| 3567 | info->params.mode = MGSL_MODE_ASYNC; |
| 3568 | break; |
| 3569 | default: |
| 3570 | devstr = "(unknown model)"; |
| 3571 | } |
| 3572 | printk("SyncLink %s %s IO=%08x IRQ=%d MaxFrameSize=%u\n", |
| 3573 | devstr, info->device_name, info->phys_reg_addr, |
| 3574 | info->irq_level, info->max_frame_size); |
| 3575 | |
Paul Fulghum | af69c7f | 2006-12-06 20:40:24 -0800 | [diff] [blame] | 3576 | #if SYNCLINK_GENERIC_HDLC |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 3577 | hdlcdev_init(info); |
| 3578 | #endif |
| 3579 | } |
| 3580 | |
Alan Cox | 31f3593 | 2009-01-02 13:45:05 +0000 | [diff] [blame] | 3581 | static const struct tty_port_operations slgt_port_ops = { |
| 3582 | .carrier_raised = carrier_raised, |
Alan Cox | fcc8ac1 | 2009-06-11 12:24:17 +0100 | [diff] [blame] | 3583 | .dtr_rts = dtr_rts, |
Alan Cox | 31f3593 | 2009-01-02 13:45:05 +0000 | [diff] [blame] | 3584 | }; |
| 3585 | |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 3586 | /* |
| 3587 | * allocate device instance structure, return NULL on failure |
| 3588 | */ |
| 3589 | static struct slgt_info *alloc_dev(int adapter_num, int port_num, struct pci_dev *pdev) |
| 3590 | { |
| 3591 | struct slgt_info *info; |
| 3592 | |
Yoann Padioleau | dd00cc4 | 2007-07-19 01:49:03 -0700 | [diff] [blame] | 3593 | info = kzalloc(sizeof(struct slgt_info), GFP_KERNEL); |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 3594 | |
| 3595 | if (!info) { |
| 3596 | DBGERR(("%s device alloc failed adapter=%d port=%d\n", |
| 3597 | driver_name, adapter_num, port_num)); |
| 3598 | } else { |
Alan Cox | 44b7d1b | 2008-07-16 21:57:18 +0100 | [diff] [blame] | 3599 | tty_port_init(&info->port); |
Alan Cox | 31f3593 | 2009-01-02 13:45:05 +0000 | [diff] [blame] | 3600 | info->port.ops = &slgt_port_ops; |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 3601 | info->magic = MGSL_MAGIC; |
David Howells | c402895 | 2006-11-22 14:57:56 +0000 | [diff] [blame] | 3602 | INIT_WORK(&info->task, bh_handler); |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 3603 | info->max_frame_size = 4096; |
Paul Fulghum | 1f80769 | 2009-04-02 16:58:30 -0700 | [diff] [blame] | 3604 | info->base_clock = 14745600; |
Paul Fulghum | 814dae0 | 2008-07-22 11:22:14 +0100 | [diff] [blame] | 3605 | info->rbuf_fill_level = DMABUFSIZE; |
Alan Cox | 44b7d1b | 2008-07-16 21:57:18 +0100 | [diff] [blame] | 3606 | info->port.close_delay = 5*HZ/10; |
| 3607 | info->port.closing_wait = 30*HZ; |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 3608 | init_waitqueue_head(&info->status_event_wait_q); |
| 3609 | init_waitqueue_head(&info->event_wait_q); |
| 3610 | spin_lock_init(&info->netlock); |
| 3611 | memcpy(&info->params,&default_params,sizeof(MGSL_PARAMS)); |
| 3612 | info->idle_mode = HDLC_TXIDLE_FLAGS; |
| 3613 | info->adapter_num = adapter_num; |
| 3614 | info->port_num = port_num; |
| 3615 | |
Jiri Slaby | 40565f1 | 2007-02-12 00:52:31 -0800 | [diff] [blame] | 3616 | setup_timer(&info->tx_timer, tx_timeout, (unsigned long)info); |
| 3617 | setup_timer(&info->rx_timer, rx_timeout, (unsigned long)info); |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 3618 | |
| 3619 | /* Copy configuration info to device instance data */ |
| 3620 | info->pdev = pdev; |
| 3621 | info->irq_level = pdev->irq; |
| 3622 | info->phys_reg_addr = pci_resource_start(pdev,0); |
| 3623 | |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 3624 | info->bus_type = MGSL_BUS_TYPE_PCI; |
Thomas Gleixner | 0f2ed4c | 2006-07-01 19:29:33 -0700 | [diff] [blame] | 3625 | info->irq_flags = IRQF_SHARED; |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 3626 | |
| 3627 | info->init_error = -1; /* assume error, set to 0 on successful init */ |
| 3628 | } |
| 3629 | |
| 3630 | return info; |
| 3631 | } |
| 3632 | |
| 3633 | static void device_init(int adapter_num, struct pci_dev *pdev) |
| 3634 | { |
| 3635 | struct slgt_info *port_array[SLGT_MAX_PORTS]; |
| 3636 | int i; |
| 3637 | int port_count = 1; |
| 3638 | |
Paul Fulghum | 6f84be8 | 2006-06-25 05:49:22 -0700 | [diff] [blame] | 3639 | if (pdev->device == SYNCLINK_GT2_DEVICE_ID) |
| 3640 | port_count = 2; |
| 3641 | else if (pdev->device == SYNCLINK_GT4_DEVICE_ID) |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 3642 | port_count = 4; |
| 3643 | |
| 3644 | /* allocate device instances for all ports */ |
| 3645 | for (i=0; i < port_count; ++i) { |
| 3646 | port_array[i] = alloc_dev(adapter_num, i, pdev); |
| 3647 | if (port_array[i] == NULL) { |
Jiri Slaby | 191c5f1 | 2012-11-15 09:49:56 +0100 | [diff] [blame] | 3648 | for (--i; i >= 0; --i) { |
| 3649 | tty_port_destroy(&port_array[i]->port); |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 3650 | kfree(port_array[i]); |
Jiri Slaby | 191c5f1 | 2012-11-15 09:49:56 +0100 | [diff] [blame] | 3651 | } |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 3652 | return; |
| 3653 | } |
| 3654 | } |
| 3655 | |
| 3656 | /* give copy of port_array to all ports and add to device list */ |
| 3657 | for (i=0; i < port_count; ++i) { |
| 3658 | memcpy(port_array[i]->port_array, port_array, sizeof(port_array)); |
| 3659 | add_device(port_array[i]); |
| 3660 | port_array[i]->port_count = port_count; |
| 3661 | spin_lock_init(&port_array[i]->lock); |
| 3662 | } |
| 3663 | |
| 3664 | /* Allocate and claim adapter resources */ |
| 3665 | if (!claim_resources(port_array[0])) { |
| 3666 | |
| 3667 | alloc_dma_bufs(port_array[0]); |
| 3668 | |
| 3669 | /* copy resource information from first port to others */ |
| 3670 | for (i = 1; i < port_count; ++i) { |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 3671 | port_array[i]->irq_level = port_array[0]->irq_level; |
| 3672 | port_array[i]->reg_addr = port_array[0]->reg_addr; |
| 3673 | alloc_dma_bufs(port_array[i]); |
| 3674 | } |
| 3675 | |
| 3676 | if (request_irq(port_array[0]->irq_level, |
| 3677 | slgt_interrupt, |
| 3678 | port_array[0]->irq_flags, |
| 3679 | port_array[0]->device_name, |
| 3680 | port_array[0]) < 0) { |
| 3681 | DBGERR(("%s request_irq failed IRQ=%d\n", |
| 3682 | port_array[0]->device_name, |
| 3683 | port_array[0]->irq_level)); |
| 3684 | } else { |
Joe Perches | 0fab6de | 2008-04-28 02:14:02 -0700 | [diff] [blame] | 3685 | port_array[0]->irq_requested = true; |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 3686 | adapter_test(port_array[0]); |
Paul Fulghum | 0080b7a | 2006-03-28 01:56:15 -0800 | [diff] [blame] | 3687 | for (i=1 ; i < port_count ; i++) { |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 3688 | port_array[i]->init_error = port_array[0]->init_error; |
Paul Fulghum | 0080b7a | 2006-03-28 01:56:15 -0800 | [diff] [blame] | 3689 | port_array[i]->gpio_present = port_array[0]->gpio_present; |
| 3690 | } |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 3691 | } |
| 3692 | } |
Paul Fulghum | 62eb5b1 | 2007-05-08 00:31:48 -0700 | [diff] [blame] | 3693 | |
Jiri Slaby | 734cc17 | 2012-08-07 21:47:47 +0200 | [diff] [blame] | 3694 | for (i = 0; i < port_count; ++i) { |
| 3695 | struct slgt_info *info = port_array[i]; |
| 3696 | tty_port_register_device(&info->port, serial_driver, info->line, |
| 3697 | &info->pdev->dev); |
| 3698 | } |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 3699 | } |
| 3700 | |
Bill Pemberton | 9671f09 | 2012-11-19 13:21:50 -0500 | [diff] [blame] | 3701 | static int init_one(struct pci_dev *dev, |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 3702 | const struct pci_device_id *ent) |
| 3703 | { |
| 3704 | if (pci_enable_device(dev)) { |
| 3705 | printk("error enabling pci device %p\n", dev); |
| 3706 | return -EIO; |
| 3707 | } |
| 3708 | pci_set_master(dev); |
| 3709 | device_init(slgt_device_count, dev); |
| 3710 | return 0; |
| 3711 | } |
| 3712 | |
Bill Pemberton | ae8d8a1 | 2012-11-19 13:26:18 -0500 | [diff] [blame] | 3713 | static void remove_one(struct pci_dev *dev) |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 3714 | { |
| 3715 | } |
| 3716 | |
Jeff Dike | b68e31d | 2006-10-02 02:17:18 -0700 | [diff] [blame] | 3717 | static const struct tty_operations ops = { |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 3718 | .open = open, |
| 3719 | .close = close, |
| 3720 | .write = write, |
| 3721 | .put_char = put_char, |
| 3722 | .flush_chars = flush_chars, |
| 3723 | .write_room = write_room, |
| 3724 | .chars_in_buffer = chars_in_buffer, |
| 3725 | .flush_buffer = flush_buffer, |
| 3726 | .ioctl = ioctl, |
Paul Fulghum | 2acdb16 | 2007-05-10 22:22:43 -0700 | [diff] [blame] | 3727 | .compat_ioctl = slgt_compat_ioctl, |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 3728 | .throttle = throttle, |
| 3729 | .unthrottle = unthrottle, |
| 3730 | .send_xchar = send_xchar, |
| 3731 | .break_ctl = set_break, |
| 3732 | .wait_until_sent = wait_until_sent, |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 3733 | .set_termios = set_termios, |
| 3734 | .stop = tx_hold, |
| 3735 | .start = tx_release, |
| 3736 | .hangup = hangup, |
| 3737 | .tiocmget = tiocmget, |
| 3738 | .tiocmset = tiocmset, |
Alan Cox | 0587102 | 2010-09-16 18:21:52 +0100 | [diff] [blame] | 3739 | .get_icount = get_icount, |
Alexey Dobriyan | a18c56e | 2009-03-31 15:19:19 -0700 | [diff] [blame] | 3740 | .proc_fops = &synclink_gt_proc_fops, |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 3741 | }; |
| 3742 | |
| 3743 | static void slgt_cleanup(void) |
| 3744 | { |
| 3745 | int rc; |
| 3746 | struct slgt_info *info; |
| 3747 | struct slgt_info *tmp; |
| 3748 | |
Paul Fulghum | a6b2f87 | 2009-01-15 13:50:57 -0800 | [diff] [blame] | 3749 | printk(KERN_INFO "unload %s\n", driver_name); |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 3750 | |
| 3751 | if (serial_driver) { |
Paul Fulghum | 62eb5b1 | 2007-05-08 00:31:48 -0700 | [diff] [blame] | 3752 | for (info=slgt_device_list ; info != NULL ; info=info->next_device) |
| 3753 | tty_unregister_device(serial_driver, info->line); |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 3754 | if ((rc = tty_unregister_driver(serial_driver))) |
| 3755 | DBGERR(("tty_unregister_driver error=%d\n", rc)); |
| 3756 | put_tty_driver(serial_driver); |
| 3757 | } |
| 3758 | |
| 3759 | /* reset devices */ |
| 3760 | info = slgt_device_list; |
| 3761 | while(info) { |
| 3762 | reset_port(info); |
| 3763 | info = info->next_device; |
| 3764 | } |
| 3765 | |
| 3766 | /* release devices */ |
| 3767 | info = slgt_device_list; |
| 3768 | while(info) { |
Paul Fulghum | af69c7f | 2006-12-06 20:40:24 -0800 | [diff] [blame] | 3769 | #if SYNCLINK_GENERIC_HDLC |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 3770 | hdlcdev_exit(info); |
| 3771 | #endif |
| 3772 | free_dma_bufs(info); |
| 3773 | free_tmp_rbuf(info); |
| 3774 | if (info->port_num == 0) |
| 3775 | release_resources(info); |
| 3776 | tmp = info; |
| 3777 | info = info->next_device; |
Jiri Slaby | 191c5f1 | 2012-11-15 09:49:56 +0100 | [diff] [blame] | 3778 | tty_port_destroy(&tmp->port); |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 3779 | kfree(tmp); |
| 3780 | } |
| 3781 | |
| 3782 | if (pci_registered) |
| 3783 | pci_unregister_driver(&pci_driver); |
| 3784 | } |
| 3785 | |
| 3786 | /* |
| 3787 | * Driver initialization entry point. |
| 3788 | */ |
| 3789 | static int __init slgt_init(void) |
| 3790 | { |
| 3791 | int rc; |
| 3792 | |
Paul Fulghum | a6b2f87 | 2009-01-15 13:50:57 -0800 | [diff] [blame] | 3793 | printk(KERN_INFO "%s\n", driver_name); |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 3794 | |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 3795 | serial_driver = alloc_tty_driver(MAX_DEVICES); |
| 3796 | if (!serial_driver) { |
Paul Fulghum | 62eb5b1 | 2007-05-08 00:31:48 -0700 | [diff] [blame] | 3797 | printk("%s can't allocate tty driver\n", driver_name); |
| 3798 | return -ENOMEM; |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 3799 | } |
| 3800 | |
| 3801 | /* Initialize the tty_driver structure */ |
| 3802 | |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 3803 | serial_driver->driver_name = tty_driver_name; |
| 3804 | serial_driver->name = tty_dev_prefix; |
| 3805 | serial_driver->major = ttymajor; |
| 3806 | serial_driver->minor_start = 64; |
| 3807 | serial_driver->type = TTY_DRIVER_TYPE_SERIAL; |
| 3808 | serial_driver->subtype = SERIAL_TYPE_NORMAL; |
| 3809 | serial_driver->init_termios = tty_std_termios; |
| 3810 | serial_driver->init_termios.c_cflag = |
| 3811 | B9600 | CS8 | CREAD | HUPCL | CLOCAL; |
Alan Cox | 606d099 | 2006-12-08 02:38:45 -0800 | [diff] [blame] | 3812 | serial_driver->init_termios.c_ispeed = 9600; |
| 3813 | serial_driver->init_termios.c_ospeed = 9600; |
Paul Fulghum | 62eb5b1 | 2007-05-08 00:31:48 -0700 | [diff] [blame] | 3814 | serial_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV; |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 3815 | tty_set_operations(serial_driver, &ops); |
| 3816 | if ((rc = tty_register_driver(serial_driver)) < 0) { |
| 3817 | DBGERR(("%s can't register serial driver\n", driver_name)); |
| 3818 | put_tty_driver(serial_driver); |
| 3819 | serial_driver = NULL; |
| 3820 | goto error; |
| 3821 | } |
| 3822 | |
Paul Fulghum | a6b2f87 | 2009-01-15 13:50:57 -0800 | [diff] [blame] | 3823 | printk(KERN_INFO "%s, tty major#%d\n", |
| 3824 | driver_name, serial_driver->major); |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 3825 | |
Paul Fulghum | 62eb5b1 | 2007-05-08 00:31:48 -0700 | [diff] [blame] | 3826 | slgt_device_count = 0; |
| 3827 | if ((rc = pci_register_driver(&pci_driver)) < 0) { |
| 3828 | printk("%s pci_register_driver error=%d\n", driver_name, rc); |
| 3829 | goto error; |
| 3830 | } |
Joe Perches | 0fab6de | 2008-04-28 02:14:02 -0700 | [diff] [blame] | 3831 | pci_registered = true; |
Paul Fulghum | 62eb5b1 | 2007-05-08 00:31:48 -0700 | [diff] [blame] | 3832 | |
| 3833 | if (!slgt_device_list) |
| 3834 | printk("%s no devices found\n",driver_name); |
| 3835 | |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 3836 | return 0; |
| 3837 | |
| 3838 | error: |
| 3839 | slgt_cleanup(); |
| 3840 | return rc; |
| 3841 | } |
| 3842 | |
| 3843 | static void __exit slgt_exit(void) |
| 3844 | { |
| 3845 | slgt_cleanup(); |
| 3846 | } |
| 3847 | |
| 3848 | module_init(slgt_init); |
| 3849 | module_exit(slgt_exit); |
| 3850 | |
| 3851 | /* |
| 3852 | * register access routines |
| 3853 | */ |
| 3854 | |
| 3855 | #define CALC_REGADDR() \ |
| 3856 | unsigned long reg_addr = ((unsigned long)info->reg_addr) + addr; \ |
| 3857 | if (addr >= 0x80) \ |
Paul Fulghum | 9807224 | 2010-10-27 15:34:22 -0700 | [diff] [blame] | 3858 | reg_addr += (info->port_num) * 32; \ |
| 3859 | else if (addr >= 0x40) \ |
| 3860 | reg_addr += (info->port_num) * 16; |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 3861 | |
| 3862 | static __u8 rd_reg8(struct slgt_info *info, unsigned int addr) |
| 3863 | { |
| 3864 | CALC_REGADDR(); |
| 3865 | return readb((void __iomem *)reg_addr); |
| 3866 | } |
| 3867 | |
| 3868 | static void wr_reg8(struct slgt_info *info, unsigned int addr, __u8 value) |
| 3869 | { |
| 3870 | CALC_REGADDR(); |
| 3871 | writeb(value, (void __iomem *)reg_addr); |
| 3872 | } |
| 3873 | |
| 3874 | static __u16 rd_reg16(struct slgt_info *info, unsigned int addr) |
| 3875 | { |
| 3876 | CALC_REGADDR(); |
| 3877 | return readw((void __iomem *)reg_addr); |
| 3878 | } |
| 3879 | |
| 3880 | static void wr_reg16(struct slgt_info *info, unsigned int addr, __u16 value) |
| 3881 | { |
| 3882 | CALC_REGADDR(); |
| 3883 | writew(value, (void __iomem *)reg_addr); |
| 3884 | } |
| 3885 | |
| 3886 | static __u32 rd_reg32(struct slgt_info *info, unsigned int addr) |
| 3887 | { |
| 3888 | CALC_REGADDR(); |
| 3889 | return readl((void __iomem *)reg_addr); |
| 3890 | } |
| 3891 | |
| 3892 | static void wr_reg32(struct slgt_info *info, unsigned int addr, __u32 value) |
| 3893 | { |
| 3894 | CALC_REGADDR(); |
| 3895 | writel(value, (void __iomem *)reg_addr); |
| 3896 | } |
| 3897 | |
| 3898 | static void rdma_reset(struct slgt_info *info) |
| 3899 | { |
| 3900 | unsigned int i; |
| 3901 | |
| 3902 | /* set reset bit */ |
| 3903 | wr_reg32(info, RDCSR, BIT1); |
| 3904 | |
| 3905 | /* wait for enable bit cleared */ |
| 3906 | for(i=0 ; i < 1000 ; i++) |
| 3907 | if (!(rd_reg32(info, RDCSR) & BIT0)) |
| 3908 | break; |
| 3909 | } |
| 3910 | |
| 3911 | static void tdma_reset(struct slgt_info *info) |
| 3912 | { |
| 3913 | unsigned int i; |
| 3914 | |
| 3915 | /* set reset bit */ |
| 3916 | wr_reg32(info, TDCSR, BIT1); |
| 3917 | |
| 3918 | /* wait for enable bit cleared */ |
| 3919 | for(i=0 ; i < 1000 ; i++) |
| 3920 | if (!(rd_reg32(info, TDCSR) & BIT0)) |
| 3921 | break; |
| 3922 | } |
| 3923 | |
| 3924 | /* |
| 3925 | * enable internal loopback |
| 3926 | * TxCLK and RxCLK are generated from BRG |
| 3927 | * and TxD is looped back to RxD internally. |
| 3928 | */ |
| 3929 | static void enable_loopback(struct slgt_info *info) |
| 3930 | { |
Masanari Iida | 5980c00 | 2012-01-20 02:00:24 +0900 | [diff] [blame] | 3931 | /* SCR (serial control) BIT2=loopback enable */ |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 3932 | wr_reg16(info, SCR, (unsigned short)(rd_reg16(info, SCR) | BIT2)); |
| 3933 | |
| 3934 | if (info->params.mode != MGSL_MODE_ASYNC) { |
| 3935 | /* CCR (clock control) |
| 3936 | * 07..05 tx clock source (010 = BRG) |
| 3937 | * 04..02 rx clock source (010 = BRG) |
| 3938 | * 01 auxclk enable (0 = disable) |
| 3939 | * 00 BRG enable (1 = enable) |
| 3940 | * |
| 3941 | * 0100 1001 |
| 3942 | */ |
| 3943 | wr_reg8(info, CCR, 0x49); |
| 3944 | |
| 3945 | /* set speed if available, otherwise use default */ |
| 3946 | if (info->params.clock_speed) |
| 3947 | set_rate(info, info->params.clock_speed); |
| 3948 | else |
| 3949 | set_rate(info, 3686400); |
| 3950 | } |
| 3951 | } |
| 3952 | |
| 3953 | /* |
| 3954 | * set baud rate generator to specified rate |
| 3955 | */ |
| 3956 | static void set_rate(struct slgt_info *info, u32 rate) |
| 3957 | { |
| 3958 | unsigned int div; |
Paul Fulghum | 1f80769 | 2009-04-02 16:58:30 -0700 | [diff] [blame] | 3959 | unsigned int osc = info->base_clock; |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 3960 | |
| 3961 | /* div = osc/rate - 1 |
| 3962 | * |
| 3963 | * Round div up if osc/rate is not integer to |
| 3964 | * force to next slowest rate. |
| 3965 | */ |
| 3966 | |
| 3967 | if (rate) { |
| 3968 | div = osc/rate; |
| 3969 | if (!(osc % rate) && div) |
| 3970 | div--; |
| 3971 | wr_reg16(info, BDR, (unsigned short)div); |
| 3972 | } |
| 3973 | } |
| 3974 | |
| 3975 | static void rx_stop(struct slgt_info *info) |
| 3976 | { |
| 3977 | unsigned short val; |
| 3978 | |
| 3979 | /* disable and reset receiver */ |
| 3980 | val = rd_reg16(info, RCR) & ~BIT1; /* clear enable bit */ |
| 3981 | wr_reg16(info, RCR, (unsigned short)(val | BIT2)); /* set reset bit */ |
| 3982 | wr_reg16(info, RCR, val); /* clear reset bit */ |
| 3983 | |
| 3984 | slgt_irq_off(info, IRQ_RXOVER + IRQ_RXDATA + IRQ_RXIDLE); |
| 3985 | |
| 3986 | /* clear pending rx interrupts */ |
| 3987 | wr_reg16(info, SSR, IRQ_RXIDLE + IRQ_RXOVER); |
| 3988 | |
| 3989 | rdma_reset(info); |
| 3990 | |
Joe Perches | 0fab6de | 2008-04-28 02:14:02 -0700 | [diff] [blame] | 3991 | info->rx_enabled = false; |
| 3992 | info->rx_restart = false; |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 3993 | } |
| 3994 | |
| 3995 | static void rx_start(struct slgt_info *info) |
| 3996 | { |
| 3997 | unsigned short val; |
| 3998 | |
| 3999 | slgt_irq_off(info, IRQ_RXOVER + IRQ_RXDATA); |
| 4000 | |
| 4001 | /* clear pending rx overrun IRQ */ |
| 4002 | wr_reg16(info, SSR, IRQ_RXOVER); |
| 4003 | |
| 4004 | /* reset and disable receiver */ |
| 4005 | val = rd_reg16(info, RCR) & ~BIT1; /* clear enable bit */ |
| 4006 | wr_reg16(info, RCR, (unsigned short)(val | BIT2)); /* set reset bit */ |
| 4007 | wr_reg16(info, RCR, val); /* clear reset bit */ |
| 4008 | |
| 4009 | rdma_reset(info); |
| 4010 | reset_rbufs(info); |
| 4011 | |
Paul Fulghum | 5ba5a5d | 2009-06-11 12:28:37 +0100 | [diff] [blame] | 4012 | if (info->rx_pio) { |
| 4013 | /* rx request when rx FIFO not empty */ |
| 4014 | wr_reg16(info, SCR, (unsigned short)(rd_reg16(info, SCR) & ~BIT14)); |
| 4015 | slgt_irq_on(info, IRQ_RXDATA); |
| 4016 | if (info->params.mode == MGSL_MODE_ASYNC) { |
| 4017 | /* enable saving of rx status */ |
| 4018 | wr_reg32(info, RDCSR, BIT6); |
| 4019 | } |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 4020 | } else { |
Paul Fulghum | 5ba5a5d | 2009-06-11 12:28:37 +0100 | [diff] [blame] | 4021 | /* rx request when rx FIFO half full */ |
| 4022 | wr_reg16(info, SCR, (unsigned short)(rd_reg16(info, SCR) | BIT14)); |
| 4023 | /* set 1st descriptor address */ |
| 4024 | wr_reg32(info, RDDAR, info->rbufs[0].pdesc); |
| 4025 | |
| 4026 | if (info->params.mode != MGSL_MODE_ASYNC) { |
| 4027 | /* enable rx DMA and DMA interrupt */ |
| 4028 | wr_reg32(info, RDCSR, (BIT2 + BIT0)); |
| 4029 | } else { |
| 4030 | /* enable saving of rx status, rx DMA and DMA interrupt */ |
| 4031 | wr_reg32(info, RDCSR, (BIT6 + BIT2 + BIT0)); |
| 4032 | } |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 4033 | } |
| 4034 | |
| 4035 | slgt_irq_on(info, IRQ_RXOVER); |
| 4036 | |
| 4037 | /* enable receiver */ |
| 4038 | wr_reg16(info, RCR, (unsigned short)(rd_reg16(info, RCR) | BIT1)); |
| 4039 | |
Joe Perches | 0fab6de | 2008-04-28 02:14:02 -0700 | [diff] [blame] | 4040 | info->rx_restart = false; |
| 4041 | info->rx_enabled = true; |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 4042 | } |
| 4043 | |
| 4044 | static void tx_start(struct slgt_info *info) |
| 4045 | { |
| 4046 | if (!info->tx_enabled) { |
| 4047 | wr_reg16(info, TCR, |
Paul Fulghum | cb10dc9 | 2006-09-30 23:27:45 -0700 | [diff] [blame] | 4048 | (unsigned short)((rd_reg16(info, TCR) | BIT1) & ~BIT2)); |
Joe Perches | 0fab6de | 2008-04-28 02:14:02 -0700 | [diff] [blame] | 4049 | info->tx_enabled = true; |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 4050 | } |
| 4051 | |
Paul Fulghum | de538eb | 2009-12-09 12:31:39 -0800 | [diff] [blame] | 4052 | if (desc_count(info->tbufs[info->tbuf_start])) { |
Joe Perches | 0fab6de | 2008-04-28 02:14:02 -0700 | [diff] [blame] | 4053 | info->drop_rts_on_tx_done = false; |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 4054 | |
| 4055 | if (info->params.mode != MGSL_MODE_ASYNC) { |
| 4056 | if (info->params.flags & HDLC_FLAG_AUTO_RTS) { |
| 4057 | get_signals(info); |
| 4058 | if (!(info->signals & SerialSignal_RTS)) { |
| 4059 | info->signals |= SerialSignal_RTS; |
| 4060 | set_signals(info); |
Joe Perches | 0fab6de | 2008-04-28 02:14:02 -0700 | [diff] [blame] | 4061 | info->drop_rts_on_tx_done = true; |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 4062 | } |
| 4063 | } |
| 4064 | |
| 4065 | slgt_irq_off(info, IRQ_TXDATA); |
| 4066 | slgt_irq_on(info, IRQ_TXUNDER + IRQ_TXIDLE); |
| 4067 | /* clear tx idle and underrun status bits */ |
| 4068 | wr_reg16(info, SSR, (unsigned short)(IRQ_TXIDLE + IRQ_TXUNDER)); |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 4069 | } else { |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 4070 | slgt_irq_off(info, IRQ_TXDATA); |
| 4071 | slgt_irq_on(info, IRQ_TXIDLE); |
| 4072 | /* clear tx idle status bit */ |
| 4073 | wr_reg16(info, SSR, IRQ_TXIDLE); |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 4074 | } |
Paul Fulghum | ce89294 | 2009-06-24 18:34:51 +0100 | [diff] [blame] | 4075 | /* set 1st descriptor address and start DMA */ |
| 4076 | wr_reg32(info, TDDAR, info->tbufs[info->tbuf_start].pdesc); |
| 4077 | wr_reg32(info, TDCSR, BIT2 + BIT0); |
Joe Perches | 0fab6de | 2008-04-28 02:14:02 -0700 | [diff] [blame] | 4078 | info->tx_active = true; |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 4079 | } |
| 4080 | } |
| 4081 | |
| 4082 | static void tx_stop(struct slgt_info *info) |
| 4083 | { |
| 4084 | unsigned short val; |
| 4085 | |
| 4086 | del_timer(&info->tx_timer); |
| 4087 | |
| 4088 | tdma_reset(info); |
| 4089 | |
| 4090 | /* reset and disable transmitter */ |
| 4091 | val = rd_reg16(info, TCR) & ~BIT1; /* clear enable bit */ |
| 4092 | wr_reg16(info, TCR, (unsigned short)(val | BIT2)); /* set reset bit */ |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 4093 | |
| 4094 | slgt_irq_off(info, IRQ_TXDATA + IRQ_TXIDLE + IRQ_TXUNDER); |
| 4095 | |
| 4096 | /* clear tx idle and underrun status bit */ |
| 4097 | wr_reg16(info, SSR, (unsigned short)(IRQ_TXIDLE + IRQ_TXUNDER)); |
| 4098 | |
| 4099 | reset_tbufs(info); |
| 4100 | |
Joe Perches | 0fab6de | 2008-04-28 02:14:02 -0700 | [diff] [blame] | 4101 | info->tx_enabled = false; |
| 4102 | info->tx_active = false; |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 4103 | } |
| 4104 | |
| 4105 | static void reset_port(struct slgt_info *info) |
| 4106 | { |
| 4107 | if (!info->reg_addr) |
| 4108 | return; |
| 4109 | |
| 4110 | tx_stop(info); |
| 4111 | rx_stop(info); |
| 4112 | |
| 4113 | info->signals &= ~(SerialSignal_DTR + SerialSignal_RTS); |
| 4114 | set_signals(info); |
| 4115 | |
| 4116 | slgt_irq_off(info, IRQ_ALL | IRQ_MASTER); |
| 4117 | } |
| 4118 | |
| 4119 | static void reset_adapter(struct slgt_info *info) |
| 4120 | { |
| 4121 | int i; |
| 4122 | for (i=0; i < info->port_count; ++i) { |
| 4123 | if (info->port_array[i]) |
| 4124 | reset_port(info->port_array[i]); |
| 4125 | } |
| 4126 | } |
| 4127 | |
| 4128 | static void async_mode(struct slgt_info *info) |
| 4129 | { |
| 4130 | unsigned short val; |
| 4131 | |
| 4132 | slgt_irq_off(info, IRQ_ALL | IRQ_MASTER); |
| 4133 | tx_stop(info); |
| 4134 | rx_stop(info); |
| 4135 | |
| 4136 | /* TCR (tx control) |
| 4137 | * |
| 4138 | * 15..13 mode, 010=async |
| 4139 | * 12..10 encoding, 000=NRZ |
| 4140 | * 09 parity enable |
| 4141 | * 08 1=odd parity, 0=even parity |
| 4142 | * 07 1=RTS driver control |
| 4143 | * 06 1=break enable |
| 4144 | * 05..04 character length |
| 4145 | * 00=5 bits |
| 4146 | * 01=6 bits |
| 4147 | * 10=7 bits |
| 4148 | * 11=8 bits |
| 4149 | * 03 0=1 stop bit, 1=2 stop bits |
| 4150 | * 02 reset |
| 4151 | * 01 enable |
| 4152 | * 00 auto-CTS enable |
| 4153 | */ |
| 4154 | val = 0x4000; |
| 4155 | |
| 4156 | if (info->if_mode & MGSL_INTERFACE_RTS_EN) |
| 4157 | val |= BIT7; |
| 4158 | |
| 4159 | if (info->params.parity != ASYNC_PARITY_NONE) { |
| 4160 | val |= BIT9; |
| 4161 | if (info->params.parity == ASYNC_PARITY_ODD) |
| 4162 | val |= BIT8; |
| 4163 | } |
| 4164 | |
| 4165 | switch (info->params.data_bits) |
| 4166 | { |
| 4167 | case 6: val |= BIT4; break; |
| 4168 | case 7: val |= BIT5; break; |
| 4169 | case 8: val |= BIT5 + BIT4; break; |
| 4170 | } |
| 4171 | |
| 4172 | if (info->params.stop_bits != 1) |
| 4173 | val |= BIT3; |
| 4174 | |
| 4175 | if (info->params.flags & HDLC_FLAG_AUTO_CTS) |
| 4176 | val |= BIT0; |
| 4177 | |
| 4178 | wr_reg16(info, TCR, val); |
| 4179 | |
| 4180 | /* RCR (rx control) |
| 4181 | * |
| 4182 | * 15..13 mode, 010=async |
| 4183 | * 12..10 encoding, 000=NRZ |
| 4184 | * 09 parity enable |
| 4185 | * 08 1=odd parity, 0=even parity |
| 4186 | * 07..06 reserved, must be 0 |
| 4187 | * 05..04 character length |
| 4188 | * 00=5 bits |
| 4189 | * 01=6 bits |
| 4190 | * 10=7 bits |
| 4191 | * 11=8 bits |
| 4192 | * 03 reserved, must be zero |
| 4193 | * 02 reset |
| 4194 | * 01 enable |
| 4195 | * 00 auto-DCD enable |
| 4196 | */ |
| 4197 | val = 0x4000; |
| 4198 | |
| 4199 | if (info->params.parity != ASYNC_PARITY_NONE) { |
| 4200 | val |= BIT9; |
| 4201 | if (info->params.parity == ASYNC_PARITY_ODD) |
| 4202 | val |= BIT8; |
| 4203 | } |
| 4204 | |
| 4205 | switch (info->params.data_bits) |
| 4206 | { |
| 4207 | case 6: val |= BIT4; break; |
| 4208 | case 7: val |= BIT5; break; |
| 4209 | case 8: val |= BIT5 + BIT4; break; |
| 4210 | } |
| 4211 | |
| 4212 | if (info->params.flags & HDLC_FLAG_AUTO_DCD) |
| 4213 | val |= BIT0; |
| 4214 | |
| 4215 | wr_reg16(info, RCR, val); |
| 4216 | |
| 4217 | /* CCR (clock control) |
| 4218 | * |
| 4219 | * 07..05 011 = tx clock source is BRG/16 |
| 4220 | * 04..02 010 = rx clock source is BRG |
| 4221 | * 01 0 = auxclk disabled |
| 4222 | * 00 1 = BRG enabled |
| 4223 | * |
| 4224 | * 0110 1001 |
| 4225 | */ |
| 4226 | wr_reg8(info, CCR, 0x69); |
| 4227 | |
| 4228 | msc_set_vcr(info); |
| 4229 | |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 4230 | /* SCR (serial control) |
| 4231 | * |
| 4232 | * 15 1=tx req on FIFO half empty |
| 4233 | * 14 1=rx req on FIFO half full |
| 4234 | * 13 tx data IRQ enable |
| 4235 | * 12 tx idle IRQ enable |
| 4236 | * 11 rx break on IRQ enable |
| 4237 | * 10 rx data IRQ enable |
| 4238 | * 09 rx break off IRQ enable |
| 4239 | * 08 overrun IRQ enable |
| 4240 | * 07 DSR IRQ enable |
| 4241 | * 06 CTS IRQ enable |
| 4242 | * 05 DCD IRQ enable |
| 4243 | * 04 RI IRQ enable |
Paul Fulghum | 1f80769 | 2009-04-02 16:58:30 -0700 | [diff] [blame] | 4244 | * 03 0=16x sampling, 1=8x sampling |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 4245 | * 02 1=txd->rxd internal loopback enable |
| 4246 | * 01 reserved, must be zero |
| 4247 | * 00 1=master IRQ enable |
| 4248 | */ |
| 4249 | val = BIT15 + BIT14 + BIT0; |
Paul Fulghum | 1f80769 | 2009-04-02 16:58:30 -0700 | [diff] [blame] | 4250 | /* JCR[8] : 1 = x8 async mode feature available */ |
| 4251 | if ((rd_reg32(info, JCR) & BIT8) && info->params.data_rate && |
| 4252 | ((info->base_clock < (info->params.data_rate * 16)) || |
| 4253 | (info->base_clock % (info->params.data_rate * 16)))) { |
| 4254 | /* use 8x sampling */ |
| 4255 | val |= BIT3; |
| 4256 | set_rate(info, info->params.data_rate * 8); |
| 4257 | } else { |
| 4258 | /* use 16x sampling */ |
| 4259 | set_rate(info, info->params.data_rate * 16); |
| 4260 | } |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 4261 | wr_reg16(info, SCR, val); |
| 4262 | |
| 4263 | slgt_irq_on(info, IRQ_RXBREAK | IRQ_RXOVER); |
| 4264 | |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 4265 | if (info->params.loopback) |
| 4266 | enable_loopback(info); |
| 4267 | } |
| 4268 | |
Paul Fulghum | cb10dc9 | 2006-09-30 23:27:45 -0700 | [diff] [blame] | 4269 | static void sync_mode(struct slgt_info *info) |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 4270 | { |
| 4271 | unsigned short val; |
| 4272 | |
| 4273 | slgt_irq_off(info, IRQ_ALL | IRQ_MASTER); |
| 4274 | tx_stop(info); |
| 4275 | rx_stop(info); |
| 4276 | |
| 4277 | /* TCR (tx control) |
| 4278 | * |
Paul Fulghum | 9807224 | 2010-10-27 15:34:22 -0700 | [diff] [blame] | 4279 | * 15..13 mode |
| 4280 | * 000=HDLC/SDLC |
| 4281 | * 001=raw bit synchronous |
| 4282 | * 010=asynchronous/isochronous |
| 4283 | * 011=monosync byte synchronous |
| 4284 | * 100=bisync byte synchronous |
| 4285 | * 101=xsync byte synchronous |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 4286 | * 12..10 encoding |
| 4287 | * 09 CRC enable |
| 4288 | * 08 CRC32 |
| 4289 | * 07 1=RTS driver control |
| 4290 | * 06 preamble enable |
| 4291 | * 05..04 preamble length |
| 4292 | * 03 share open/close flag |
| 4293 | * 02 reset |
| 4294 | * 01 enable |
| 4295 | * 00 auto-CTS enable |
| 4296 | */ |
Paul Fulghum | 993456c | 2008-07-22 11:22:04 +0100 | [diff] [blame] | 4297 | val = BIT2; |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 4298 | |
Paul Fulghum | cb10dc9 | 2006-09-30 23:27:45 -0700 | [diff] [blame] | 4299 | switch(info->params.mode) { |
Paul Fulghum | 9807224 | 2010-10-27 15:34:22 -0700 | [diff] [blame] | 4300 | case MGSL_MODE_XSYNC: |
| 4301 | val |= BIT15 + BIT13; |
| 4302 | break; |
Paul Fulghum | cb10dc9 | 2006-09-30 23:27:45 -0700 | [diff] [blame] | 4303 | case MGSL_MODE_MONOSYNC: val |= BIT14 + BIT13; break; |
| 4304 | case MGSL_MODE_BISYNC: val |= BIT15; break; |
| 4305 | case MGSL_MODE_RAW: val |= BIT13; break; |
| 4306 | } |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 4307 | if (info->if_mode & MGSL_INTERFACE_RTS_EN) |
| 4308 | val |= BIT7; |
| 4309 | |
| 4310 | switch(info->params.encoding) |
| 4311 | { |
| 4312 | case HDLC_ENCODING_NRZB: val |= BIT10; break; |
| 4313 | case HDLC_ENCODING_NRZI_MARK: val |= BIT11; break; |
| 4314 | case HDLC_ENCODING_NRZI: val |= BIT11 + BIT10; break; |
| 4315 | case HDLC_ENCODING_BIPHASE_MARK: val |= BIT12; break; |
| 4316 | case HDLC_ENCODING_BIPHASE_SPACE: val |= BIT12 + BIT10; break; |
| 4317 | case HDLC_ENCODING_BIPHASE_LEVEL: val |= BIT12 + BIT11; break; |
| 4318 | case HDLC_ENCODING_DIFF_BIPHASE_LEVEL: val |= BIT12 + BIT11 + BIT10; break; |
| 4319 | } |
| 4320 | |
Paul Fulghum | 04b374d | 2006-06-25 05:49:21 -0700 | [diff] [blame] | 4321 | switch (info->params.crc_type & HDLC_CRC_MASK) |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 4322 | { |
| 4323 | case HDLC_CRC_16_CCITT: val |= BIT9; break; |
| 4324 | case HDLC_CRC_32_CCITT: val |= BIT9 + BIT8; break; |
| 4325 | } |
| 4326 | |
| 4327 | if (info->params.preamble != HDLC_PREAMBLE_PATTERN_NONE) |
| 4328 | val |= BIT6; |
| 4329 | |
| 4330 | switch (info->params.preamble_length) |
| 4331 | { |
| 4332 | case HDLC_PREAMBLE_LENGTH_16BITS: val |= BIT5; break; |
| 4333 | case HDLC_PREAMBLE_LENGTH_32BITS: val |= BIT4; break; |
| 4334 | case HDLC_PREAMBLE_LENGTH_64BITS: val |= BIT5 + BIT4; break; |
| 4335 | } |
| 4336 | |
| 4337 | if (info->params.flags & HDLC_FLAG_AUTO_CTS) |
| 4338 | val |= BIT0; |
| 4339 | |
| 4340 | wr_reg16(info, TCR, val); |
| 4341 | |
| 4342 | /* TPR (transmit preamble) */ |
| 4343 | |
| 4344 | switch (info->params.preamble) |
| 4345 | { |
| 4346 | case HDLC_PREAMBLE_PATTERN_FLAGS: val = 0x7e; break; |
| 4347 | case HDLC_PREAMBLE_PATTERN_ONES: val = 0xff; break; |
| 4348 | case HDLC_PREAMBLE_PATTERN_ZEROS: val = 0x00; break; |
| 4349 | case HDLC_PREAMBLE_PATTERN_10: val = 0x55; break; |
| 4350 | case HDLC_PREAMBLE_PATTERN_01: val = 0xaa; break; |
| 4351 | default: val = 0x7e; break; |
| 4352 | } |
| 4353 | wr_reg8(info, TPR, (unsigned char)val); |
| 4354 | |
| 4355 | /* RCR (rx control) |
| 4356 | * |
Paul Fulghum | 9807224 | 2010-10-27 15:34:22 -0700 | [diff] [blame] | 4357 | * 15..13 mode |
| 4358 | * 000=HDLC/SDLC |
| 4359 | * 001=raw bit synchronous |
| 4360 | * 010=asynchronous/isochronous |
| 4361 | * 011=monosync byte synchronous |
| 4362 | * 100=bisync byte synchronous |
| 4363 | * 101=xsync byte synchronous |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 4364 | * 12..10 encoding |
| 4365 | * 09 CRC enable |
| 4366 | * 08 CRC32 |
| 4367 | * 07..03 reserved, must be 0 |
| 4368 | * 02 reset |
| 4369 | * 01 enable |
| 4370 | * 00 auto-DCD enable |
| 4371 | */ |
| 4372 | val = 0; |
| 4373 | |
Paul Fulghum | cb10dc9 | 2006-09-30 23:27:45 -0700 | [diff] [blame] | 4374 | switch(info->params.mode) { |
Paul Fulghum | 9807224 | 2010-10-27 15:34:22 -0700 | [diff] [blame] | 4375 | case MGSL_MODE_XSYNC: |
| 4376 | val |= BIT15 + BIT13; |
| 4377 | break; |
Paul Fulghum | cb10dc9 | 2006-09-30 23:27:45 -0700 | [diff] [blame] | 4378 | case MGSL_MODE_MONOSYNC: val |= BIT14 + BIT13; break; |
| 4379 | case MGSL_MODE_BISYNC: val |= BIT15; break; |
| 4380 | case MGSL_MODE_RAW: val |= BIT13; break; |
| 4381 | } |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 4382 | |
| 4383 | switch(info->params.encoding) |
| 4384 | { |
| 4385 | case HDLC_ENCODING_NRZB: val |= BIT10; break; |
| 4386 | case HDLC_ENCODING_NRZI_MARK: val |= BIT11; break; |
| 4387 | case HDLC_ENCODING_NRZI: val |= BIT11 + BIT10; break; |
| 4388 | case HDLC_ENCODING_BIPHASE_MARK: val |= BIT12; break; |
| 4389 | case HDLC_ENCODING_BIPHASE_SPACE: val |= BIT12 + BIT10; break; |
| 4390 | case HDLC_ENCODING_BIPHASE_LEVEL: val |= BIT12 + BIT11; break; |
| 4391 | case HDLC_ENCODING_DIFF_BIPHASE_LEVEL: val |= BIT12 + BIT11 + BIT10; break; |
| 4392 | } |
| 4393 | |
Paul Fulghum | 04b374d | 2006-06-25 05:49:21 -0700 | [diff] [blame] | 4394 | switch (info->params.crc_type & HDLC_CRC_MASK) |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 4395 | { |
| 4396 | case HDLC_CRC_16_CCITT: val |= BIT9; break; |
| 4397 | case HDLC_CRC_32_CCITT: val |= BIT9 + BIT8; break; |
| 4398 | } |
| 4399 | |
| 4400 | if (info->params.flags & HDLC_FLAG_AUTO_DCD) |
| 4401 | val |= BIT0; |
| 4402 | |
| 4403 | wr_reg16(info, RCR, val); |
| 4404 | |
| 4405 | /* CCR (clock control) |
| 4406 | * |
| 4407 | * 07..05 tx clock source |
| 4408 | * 04..02 rx clock source |
| 4409 | * 01 auxclk enable |
| 4410 | * 00 BRG enable |
| 4411 | */ |
| 4412 | val = 0; |
| 4413 | |
| 4414 | if (info->params.flags & HDLC_FLAG_TXC_BRG) |
| 4415 | { |
| 4416 | // when RxC source is DPLL, BRG generates 16X DPLL |
| 4417 | // reference clock, so take TxC from BRG/16 to get |
| 4418 | // transmit clock at actual data rate |
| 4419 | if (info->params.flags & HDLC_FLAG_RXC_DPLL) |
| 4420 | val |= BIT6 + BIT5; /* 011, txclk = BRG/16 */ |
| 4421 | else |
| 4422 | val |= BIT6; /* 010, txclk = BRG */ |
| 4423 | } |
| 4424 | else if (info->params.flags & HDLC_FLAG_TXC_DPLL) |
| 4425 | val |= BIT7; /* 100, txclk = DPLL Input */ |
| 4426 | else if (info->params.flags & HDLC_FLAG_TXC_RXCPIN) |
| 4427 | val |= BIT5; /* 001, txclk = RXC Input */ |
| 4428 | |
| 4429 | if (info->params.flags & HDLC_FLAG_RXC_BRG) |
| 4430 | val |= BIT3; /* 010, rxclk = BRG */ |
| 4431 | else if (info->params.flags & HDLC_FLAG_RXC_DPLL) |
| 4432 | val |= BIT4; /* 100, rxclk = DPLL */ |
| 4433 | else if (info->params.flags & HDLC_FLAG_RXC_TXCPIN) |
| 4434 | val |= BIT2; /* 001, rxclk = TXC Input */ |
| 4435 | |
| 4436 | if (info->params.clock_speed) |
| 4437 | val |= BIT1 + BIT0; |
| 4438 | |
| 4439 | wr_reg8(info, CCR, (unsigned char)val); |
| 4440 | |
| 4441 | if (info->params.flags & (HDLC_FLAG_TXC_DPLL + HDLC_FLAG_RXC_DPLL)) |
| 4442 | { |
| 4443 | // program DPLL mode |
| 4444 | switch(info->params.encoding) |
| 4445 | { |
| 4446 | case HDLC_ENCODING_BIPHASE_MARK: |
| 4447 | case HDLC_ENCODING_BIPHASE_SPACE: |
| 4448 | val = BIT7; break; |
| 4449 | case HDLC_ENCODING_BIPHASE_LEVEL: |
| 4450 | case HDLC_ENCODING_DIFF_BIPHASE_LEVEL: |
| 4451 | val = BIT7 + BIT6; break; |
| 4452 | default: val = BIT6; // NRZ encodings |
| 4453 | } |
| 4454 | wr_reg16(info, RCR, (unsigned short)(rd_reg16(info, RCR) | val)); |
| 4455 | |
| 4456 | // DPLL requires a 16X reference clock from BRG |
| 4457 | set_rate(info, info->params.clock_speed * 16); |
| 4458 | } |
| 4459 | else |
| 4460 | set_rate(info, info->params.clock_speed); |
| 4461 | |
| 4462 | tx_set_idle(info); |
| 4463 | |
| 4464 | msc_set_vcr(info); |
| 4465 | |
| 4466 | /* SCR (serial control) |
| 4467 | * |
| 4468 | * 15 1=tx req on FIFO half empty |
| 4469 | * 14 1=rx req on FIFO half full |
| 4470 | * 13 tx data IRQ enable |
| 4471 | * 12 tx idle IRQ enable |
| 4472 | * 11 underrun IRQ enable |
| 4473 | * 10 rx data IRQ enable |
| 4474 | * 09 rx idle IRQ enable |
| 4475 | * 08 overrun IRQ enable |
| 4476 | * 07 DSR IRQ enable |
| 4477 | * 06 CTS IRQ enable |
| 4478 | * 05 DCD IRQ enable |
| 4479 | * 04 RI IRQ enable |
| 4480 | * 03 reserved, must be zero |
| 4481 | * 02 1=txd->rxd internal loopback enable |
| 4482 | * 01 reserved, must be zero |
| 4483 | * 00 1=master IRQ enable |
| 4484 | */ |
| 4485 | wr_reg16(info, SCR, BIT15 + BIT14 + BIT0); |
| 4486 | |
| 4487 | if (info->params.loopback) |
| 4488 | enable_loopback(info); |
| 4489 | } |
| 4490 | |
| 4491 | /* |
| 4492 | * set transmit idle mode |
| 4493 | */ |
| 4494 | static void tx_set_idle(struct slgt_info *info) |
| 4495 | { |
Paul Fulghum | 643f331 | 2006-06-25 05:49:20 -0700 | [diff] [blame] | 4496 | unsigned char val; |
| 4497 | unsigned short tcr; |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 4498 | |
Paul Fulghum | 643f331 | 2006-06-25 05:49:20 -0700 | [diff] [blame] | 4499 | /* if preamble enabled (tcr[6] == 1) then tx idle size = 8 bits |
| 4500 | * else tcr[5:4] = tx idle size: 00 = 8 bits, 01 = 16 bits |
| 4501 | */ |
| 4502 | tcr = rd_reg16(info, TCR); |
| 4503 | if (info->idle_mode & HDLC_TXIDLE_CUSTOM_16) { |
| 4504 | /* disable preamble, set idle size to 16 bits */ |
| 4505 | tcr = (tcr & ~(BIT6 + BIT5)) | BIT4; |
| 4506 | /* MSB of 16 bit idle specified in tx preamble register (TPR) */ |
| 4507 | wr_reg8(info, TPR, (unsigned char)((info->idle_mode >> 8) & 0xff)); |
| 4508 | } else if (!(tcr & BIT6)) { |
| 4509 | /* preamble is disabled, set idle size to 8 bits */ |
| 4510 | tcr &= ~(BIT5 + BIT4); |
| 4511 | } |
| 4512 | wr_reg16(info, TCR, tcr); |
| 4513 | |
| 4514 | if (info->idle_mode & (HDLC_TXIDLE_CUSTOM_8 | HDLC_TXIDLE_CUSTOM_16)) { |
| 4515 | /* LSB of custom tx idle specified in tx idle register */ |
| 4516 | val = (unsigned char)(info->idle_mode & 0xff); |
| 4517 | } else { |
| 4518 | /* standard 8 bit idle patterns */ |
| 4519 | switch(info->idle_mode) |
| 4520 | { |
| 4521 | case HDLC_TXIDLE_FLAGS: val = 0x7e; break; |
| 4522 | case HDLC_TXIDLE_ALT_ZEROS_ONES: |
| 4523 | case HDLC_TXIDLE_ALT_MARK_SPACE: val = 0xaa; break; |
| 4524 | case HDLC_TXIDLE_ZEROS: |
| 4525 | case HDLC_TXIDLE_SPACE: val = 0x00; break; |
| 4526 | default: val = 0xff; |
| 4527 | } |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 4528 | } |
| 4529 | |
| 4530 | wr_reg8(info, TIR, val); |
| 4531 | } |
| 4532 | |
| 4533 | /* |
| 4534 | * get state of V24 status (input) signals |
| 4535 | */ |
| 4536 | static void get_signals(struct slgt_info *info) |
| 4537 | { |
| 4538 | unsigned short status = rd_reg16(info, SSR); |
| 4539 | |
| 4540 | /* clear all serial signals except DTR and RTS */ |
| 4541 | info->signals &= SerialSignal_DTR + SerialSignal_RTS; |
| 4542 | |
| 4543 | if (status & BIT3) |
| 4544 | info->signals |= SerialSignal_DSR; |
| 4545 | if (status & BIT2) |
| 4546 | info->signals |= SerialSignal_CTS; |
| 4547 | if (status & BIT1) |
| 4548 | info->signals |= SerialSignal_DCD; |
| 4549 | if (status & BIT0) |
| 4550 | info->signals |= SerialSignal_RI; |
| 4551 | } |
| 4552 | |
| 4553 | /* |
| 4554 | * set V.24 Control Register based on current configuration |
| 4555 | */ |
| 4556 | static void msc_set_vcr(struct slgt_info *info) |
| 4557 | { |
| 4558 | unsigned char val = 0; |
| 4559 | |
| 4560 | /* VCR (V.24 control) |
| 4561 | * |
| 4562 | * 07..04 serial IF select |
| 4563 | * 03 DTR |
| 4564 | * 02 RTS |
| 4565 | * 01 LL |
| 4566 | * 00 RL |
| 4567 | */ |
| 4568 | |
| 4569 | switch(info->if_mode & MGSL_INTERFACE_MASK) |
| 4570 | { |
| 4571 | case MGSL_INTERFACE_RS232: |
| 4572 | val |= BIT5; /* 0010 */ |
| 4573 | break; |
| 4574 | case MGSL_INTERFACE_V35: |
| 4575 | val |= BIT7 + BIT6 + BIT5; /* 1110 */ |
| 4576 | break; |
| 4577 | case MGSL_INTERFACE_RS422: |
| 4578 | val |= BIT6; /* 0100 */ |
| 4579 | break; |
| 4580 | } |
| 4581 | |
Paul Fulghum | e559071 | 2008-07-22 11:21:39 +0100 | [diff] [blame] | 4582 | if (info->if_mode & MGSL_INTERFACE_MSB_FIRST) |
| 4583 | val |= BIT4; |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 4584 | if (info->signals & SerialSignal_DTR) |
| 4585 | val |= BIT3; |
| 4586 | if (info->signals & SerialSignal_RTS) |
| 4587 | val |= BIT2; |
| 4588 | if (info->if_mode & MGSL_INTERFACE_LL) |
| 4589 | val |= BIT1; |
| 4590 | if (info->if_mode & MGSL_INTERFACE_RL) |
| 4591 | val |= BIT0; |
| 4592 | wr_reg8(info, VCR, val); |
| 4593 | } |
| 4594 | |
| 4595 | /* |
| 4596 | * set state of V24 control (output) signals |
| 4597 | */ |
| 4598 | static void set_signals(struct slgt_info *info) |
| 4599 | { |
| 4600 | unsigned char val = rd_reg8(info, VCR); |
| 4601 | if (info->signals & SerialSignal_DTR) |
| 4602 | val |= BIT3; |
| 4603 | else |
| 4604 | val &= ~BIT3; |
| 4605 | if (info->signals & SerialSignal_RTS) |
| 4606 | val |= BIT2; |
| 4607 | else |
| 4608 | val &= ~BIT2; |
| 4609 | wr_reg8(info, VCR, val); |
| 4610 | } |
| 4611 | |
| 4612 | /* |
| 4613 | * free range of receive DMA buffers (i to last) |
| 4614 | */ |
| 4615 | static void free_rbufs(struct slgt_info *info, unsigned int i, unsigned int last) |
| 4616 | { |
| 4617 | int done = 0; |
| 4618 | |
| 4619 | while(!done) { |
| 4620 | /* reset current buffer for reuse */ |
| 4621 | info->rbufs[i].status = 0; |
Paul Fulghum | 814dae0 | 2008-07-22 11:22:14 +0100 | [diff] [blame] | 4622 | set_desc_count(info->rbufs[i], info->rbuf_fill_level); |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 4623 | if (i == last) |
| 4624 | done = 1; |
| 4625 | if (++i == info->rbuf_count) |
| 4626 | i = 0; |
| 4627 | } |
| 4628 | info->rbuf_current = i; |
| 4629 | } |
| 4630 | |
| 4631 | /* |
| 4632 | * mark all receive DMA buffers as free |
| 4633 | */ |
| 4634 | static void reset_rbufs(struct slgt_info *info) |
| 4635 | { |
| 4636 | free_rbufs(info, 0, info->rbuf_count - 1); |
Paul Fulghum | 5ba5a5d | 2009-06-11 12:28:37 +0100 | [diff] [blame] | 4637 | info->rbuf_fill_index = 0; |
| 4638 | info->rbuf_fill_count = 0; |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 4639 | } |
| 4640 | |
| 4641 | /* |
| 4642 | * pass receive HDLC frame to upper layer |
| 4643 | * |
Joe Perches | 0fab6de | 2008-04-28 02:14:02 -0700 | [diff] [blame] | 4644 | * return true if frame available, otherwise false |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 4645 | */ |
Joe Perches | 0fab6de | 2008-04-28 02:14:02 -0700 | [diff] [blame] | 4646 | static bool rx_get_frame(struct slgt_info *info) |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 4647 | { |
| 4648 | unsigned int start, end; |
| 4649 | unsigned short status; |
| 4650 | unsigned int framesize = 0; |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 4651 | unsigned long flags; |
Alan Cox | 8fb06c7 | 2008-07-16 21:56:46 +0100 | [diff] [blame] | 4652 | struct tty_struct *tty = info->port.tty; |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 4653 | unsigned char addr_field = 0xff; |
Paul Fulghum | 04b374d | 2006-06-25 05:49:21 -0700 | [diff] [blame] | 4654 | unsigned int crc_size = 0; |
| 4655 | |
| 4656 | switch (info->params.crc_type & HDLC_CRC_MASK) { |
| 4657 | case HDLC_CRC_16_CCITT: crc_size = 2; break; |
| 4658 | case HDLC_CRC_32_CCITT: crc_size = 4; break; |
| 4659 | } |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 4660 | |
| 4661 | check_again: |
| 4662 | |
| 4663 | framesize = 0; |
| 4664 | addr_field = 0xff; |
| 4665 | start = end = info->rbuf_current; |
| 4666 | |
| 4667 | for (;;) { |
| 4668 | if (!desc_complete(info->rbufs[end])) |
| 4669 | goto cleanup; |
| 4670 | |
| 4671 | if (framesize == 0 && info->params.addr_filter != 0xff) |
| 4672 | addr_field = info->rbufs[end].buf[0]; |
| 4673 | |
| 4674 | framesize += desc_count(info->rbufs[end]); |
| 4675 | |
| 4676 | if (desc_eof(info->rbufs[end])) |
| 4677 | break; |
| 4678 | |
| 4679 | if (++end == info->rbuf_count) |
| 4680 | end = 0; |
| 4681 | |
| 4682 | if (end == info->rbuf_current) { |
| 4683 | if (info->rx_enabled){ |
| 4684 | spin_lock_irqsave(&info->lock,flags); |
| 4685 | rx_start(info); |
| 4686 | spin_unlock_irqrestore(&info->lock,flags); |
| 4687 | } |
| 4688 | goto cleanup; |
| 4689 | } |
| 4690 | } |
| 4691 | |
| 4692 | /* status |
| 4693 | * |
| 4694 | * 15 buffer complete |
| 4695 | * 14..06 reserved |
| 4696 | * 05..04 residue |
| 4697 | * 02 eof (end of frame) |
| 4698 | * 01 CRC error |
| 4699 | * 00 abort |
| 4700 | */ |
| 4701 | status = desc_status(info->rbufs[end]); |
| 4702 | |
| 4703 | /* ignore CRC bit if not using CRC (bit is undefined) */ |
Paul Fulghum | 04b374d | 2006-06-25 05:49:21 -0700 | [diff] [blame] | 4704 | if ((info->params.crc_type & HDLC_CRC_MASK) == HDLC_CRC_NONE) |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 4705 | status &= ~BIT1; |
| 4706 | |
| 4707 | if (framesize == 0 || |
| 4708 | (addr_field != 0xff && addr_field != info->params.addr_filter)) { |
| 4709 | free_rbufs(info, start, end); |
| 4710 | goto check_again; |
| 4711 | } |
| 4712 | |
Paul Fulghum | 04b374d | 2006-06-25 05:49:21 -0700 | [diff] [blame] | 4713 | if (framesize < (2 + crc_size) || status & BIT0) { |
| 4714 | info->icount.rxshort++; |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 4715 | framesize = 0; |
Paul Fulghum | 04b374d | 2006-06-25 05:49:21 -0700 | [diff] [blame] | 4716 | } else if (status & BIT1) { |
| 4717 | info->icount.rxcrc++; |
| 4718 | if (!(info->params.crc_type & HDLC_CRC_RETURN_EX)) |
| 4719 | framesize = 0; |
| 4720 | } |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 4721 | |
Paul Fulghum | af69c7f | 2006-12-06 20:40:24 -0800 | [diff] [blame] | 4722 | #if SYNCLINK_GENERIC_HDLC |
Paul Fulghum | 04b374d | 2006-06-25 05:49:21 -0700 | [diff] [blame] | 4723 | if (framesize == 0) { |
Krzysztof Halasa | 198191c | 2008-06-30 23:26:53 +0200 | [diff] [blame] | 4724 | info->netdev->stats.rx_errors++; |
| 4725 | info->netdev->stats.rx_frame_errors++; |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 4726 | } |
Paul Fulghum | 04b374d | 2006-06-25 05:49:21 -0700 | [diff] [blame] | 4727 | #endif |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 4728 | |
| 4729 | DBGBH(("%s rx frame status=%04X size=%d\n", |
| 4730 | info->device_name, status, framesize)); |
Paul Fulghum | 814dae0 | 2008-07-22 11:22:14 +0100 | [diff] [blame] | 4731 | DBGDATA(info, info->rbufs[start].buf, min_t(int, framesize, info->rbuf_fill_level), "rx"); |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 4732 | |
| 4733 | if (framesize) { |
Paul Fulghum | 04b374d | 2006-06-25 05:49:21 -0700 | [diff] [blame] | 4734 | if (!(info->params.crc_type & HDLC_CRC_RETURN_EX)) { |
| 4735 | framesize -= crc_size; |
| 4736 | crc_size = 0; |
| 4737 | } |
| 4738 | |
| 4739 | if (framesize > info->max_frame_size + crc_size) |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 4740 | info->icount.rxlong++; |
| 4741 | else { |
| 4742 | /* copy dma buffer(s) to contiguous temp buffer */ |
| 4743 | int copy_count = framesize; |
| 4744 | int i = start; |
| 4745 | unsigned char *p = info->tmp_rbuf; |
| 4746 | info->tmp_rbuf_count = framesize; |
| 4747 | |
| 4748 | info->icount.rxok++; |
| 4749 | |
| 4750 | while(copy_count) { |
Paul Fulghum | 814dae0 | 2008-07-22 11:22:14 +0100 | [diff] [blame] | 4751 | int partial_count = min_t(int, copy_count, info->rbuf_fill_level); |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 4752 | memcpy(p, info->rbufs[i].buf, partial_count); |
| 4753 | p += partial_count; |
| 4754 | copy_count -= partial_count; |
| 4755 | if (++i == info->rbuf_count) |
| 4756 | i = 0; |
| 4757 | } |
| 4758 | |
Paul Fulghum | 04b374d | 2006-06-25 05:49:21 -0700 | [diff] [blame] | 4759 | if (info->params.crc_type & HDLC_CRC_RETURN_EX) { |
| 4760 | *p = (status & BIT1) ? RX_CRC_ERROR : RX_OK; |
| 4761 | framesize++; |
| 4762 | } |
| 4763 | |
Paul Fulghum | af69c7f | 2006-12-06 20:40:24 -0800 | [diff] [blame] | 4764 | #if SYNCLINK_GENERIC_HDLC |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 4765 | if (info->netcount) |
| 4766 | hdlcdev_rx(info,info->tmp_rbuf, framesize); |
| 4767 | else |
| 4768 | #endif |
| 4769 | ldisc_receive_buf(tty, info->tmp_rbuf, info->flag_buf, framesize); |
| 4770 | } |
| 4771 | } |
| 4772 | free_rbufs(info, start, end); |
Joe Perches | 0fab6de | 2008-04-28 02:14:02 -0700 | [diff] [blame] | 4773 | return true; |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 4774 | |
| 4775 | cleanup: |
Joe Perches | 0fab6de | 2008-04-28 02:14:02 -0700 | [diff] [blame] | 4776 | return false; |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 4777 | } |
| 4778 | |
| 4779 | /* |
| 4780 | * pass receive buffer (RAW synchronous mode) to tty layer |
Joe Perches | 0fab6de | 2008-04-28 02:14:02 -0700 | [diff] [blame] | 4781 | * return true if buffer available, otherwise false |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 4782 | */ |
Joe Perches | 0fab6de | 2008-04-28 02:14:02 -0700 | [diff] [blame] | 4783 | static bool rx_get_buf(struct slgt_info *info) |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 4784 | { |
| 4785 | unsigned int i = info->rbuf_current; |
Paul Fulghum | cb10dc9 | 2006-09-30 23:27:45 -0700 | [diff] [blame] | 4786 | unsigned int count; |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 4787 | |
| 4788 | if (!desc_complete(info->rbufs[i])) |
Joe Perches | 0fab6de | 2008-04-28 02:14:02 -0700 | [diff] [blame] | 4789 | return false; |
Paul Fulghum | cb10dc9 | 2006-09-30 23:27:45 -0700 | [diff] [blame] | 4790 | count = desc_count(info->rbufs[i]); |
| 4791 | switch(info->params.mode) { |
| 4792 | case MGSL_MODE_MONOSYNC: |
| 4793 | case MGSL_MODE_BISYNC: |
Paul Fulghum | 9807224 | 2010-10-27 15:34:22 -0700 | [diff] [blame] | 4794 | case MGSL_MODE_XSYNC: |
Paul Fulghum | cb10dc9 | 2006-09-30 23:27:45 -0700 | [diff] [blame] | 4795 | /* ignore residue in byte synchronous modes */ |
| 4796 | if (desc_residue(info->rbufs[i])) |
| 4797 | count--; |
| 4798 | break; |
| 4799 | } |
| 4800 | DBGDATA(info, info->rbufs[i].buf, count, "rx"); |
| 4801 | DBGINFO(("rx_get_buf size=%d\n", count)); |
| 4802 | if (count) |
Alan Cox | 8fb06c7 | 2008-07-16 21:56:46 +0100 | [diff] [blame] | 4803 | ldisc_receive_buf(info->port.tty, info->rbufs[i].buf, |
Paul Fulghum | cb10dc9 | 2006-09-30 23:27:45 -0700 | [diff] [blame] | 4804 | info->flag_buf, count); |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 4805 | free_rbufs(info, i, i); |
Joe Perches | 0fab6de | 2008-04-28 02:14:02 -0700 | [diff] [blame] | 4806 | return true; |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 4807 | } |
| 4808 | |
| 4809 | static void reset_tbufs(struct slgt_info *info) |
| 4810 | { |
| 4811 | unsigned int i; |
| 4812 | info->tbuf_current = 0; |
| 4813 | for (i=0 ; i < info->tbuf_count ; i++) { |
| 4814 | info->tbufs[i].status = 0; |
| 4815 | info->tbufs[i].count = 0; |
| 4816 | } |
| 4817 | } |
| 4818 | |
| 4819 | /* |
| 4820 | * return number of free transmit DMA buffers |
| 4821 | */ |
| 4822 | static unsigned int free_tbuf_count(struct slgt_info *info) |
| 4823 | { |
| 4824 | unsigned int count = 0; |
| 4825 | unsigned int i = info->tbuf_current; |
| 4826 | |
| 4827 | do |
| 4828 | { |
| 4829 | if (desc_count(info->tbufs[i])) |
| 4830 | break; /* buffer in use */ |
| 4831 | ++count; |
| 4832 | if (++i == info->tbuf_count) |
| 4833 | i=0; |
| 4834 | } while (i != info->tbuf_current); |
| 4835 | |
Paul Fulghum | bb029c6 | 2007-07-31 00:37:35 -0700 | [diff] [blame] | 4836 | /* if tx DMA active, last zero count buffer is in use */ |
| 4837 | if (count && (rd_reg32(info, TDCSR) & BIT0)) |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 4838 | --count; |
| 4839 | |
| 4840 | return count; |
| 4841 | } |
| 4842 | |
| 4843 | /* |
Paul Fulghum | 403214d | 2008-07-22 11:21:55 +0100 | [diff] [blame] | 4844 | * return number of bytes in unsent transmit DMA buffers |
| 4845 | * and the serial controller tx FIFO |
| 4846 | */ |
| 4847 | static unsigned int tbuf_bytes(struct slgt_info *info) |
| 4848 | { |
| 4849 | unsigned int total_count = 0; |
| 4850 | unsigned int i = info->tbuf_current; |
| 4851 | unsigned int reg_value; |
| 4852 | unsigned int count; |
| 4853 | unsigned int active_buf_count = 0; |
| 4854 | |
| 4855 | /* |
| 4856 | * Add descriptor counts for all tx DMA buffers. |
| 4857 | * If count is zero (cleared by DMA controller after read), |
| 4858 | * the buffer is complete or is actively being read from. |
| 4859 | * |
| 4860 | * Record buf_count of last buffer with zero count starting |
| 4861 | * from current ring position. buf_count is mirror |
| 4862 | * copy of count and is not cleared by serial controller. |
| 4863 | * If DMA controller is active, that buffer is actively |
| 4864 | * being read so add to total. |
| 4865 | */ |
| 4866 | do { |
| 4867 | count = desc_count(info->tbufs[i]); |
| 4868 | if (count) |
| 4869 | total_count += count; |
| 4870 | else if (!total_count) |
| 4871 | active_buf_count = info->tbufs[i].buf_count; |
| 4872 | if (++i == info->tbuf_count) |
| 4873 | i = 0; |
| 4874 | } while (i != info->tbuf_current); |
| 4875 | |
| 4876 | /* read tx DMA status register */ |
| 4877 | reg_value = rd_reg32(info, TDCSR); |
| 4878 | |
| 4879 | /* if tx DMA active, last zero count buffer is in use */ |
| 4880 | if (reg_value & BIT0) |
| 4881 | total_count += active_buf_count; |
| 4882 | |
| 4883 | /* add tx FIFO count = reg_value[15..8] */ |
| 4884 | total_count += (reg_value >> 8) & 0xff; |
| 4885 | |
| 4886 | /* if transmitter active add one byte for shift register */ |
| 4887 | if (info->tx_active) |
| 4888 | total_count++; |
| 4889 | |
| 4890 | return total_count; |
| 4891 | } |
| 4892 | |
| 4893 | /* |
Paul Fulghum | de538eb | 2009-12-09 12:31:39 -0800 | [diff] [blame] | 4894 | * load data into transmit DMA buffer ring and start transmitter if needed |
| 4895 | * return true if data accepted, otherwise false (buffers full) |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 4896 | */ |
Paul Fulghum | de538eb | 2009-12-09 12:31:39 -0800 | [diff] [blame] | 4897 | static bool tx_load(struct slgt_info *info, const char *buf, unsigned int size) |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 4898 | { |
| 4899 | unsigned short count; |
| 4900 | unsigned int i; |
| 4901 | struct slgt_desc *d; |
| 4902 | |
Paul Fulghum | de538eb | 2009-12-09 12:31:39 -0800 | [diff] [blame] | 4903 | /* check required buffer space */ |
| 4904 | if (DIV_ROUND_UP(size, DMABUFSIZE) > free_tbuf_count(info)) |
| 4905 | return false; |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 4906 | |
| 4907 | DBGDATA(info, buf, size, "tx"); |
| 4908 | |
Paul Fulghum | de538eb | 2009-12-09 12:31:39 -0800 | [diff] [blame] | 4909 | /* |
| 4910 | * copy data to one or more DMA buffers in circular ring |
| 4911 | * tbuf_start = first buffer for this data |
| 4912 | * tbuf_current = next free buffer |
| 4913 | * |
| 4914 | * Copy all data before making data visible to DMA controller by |
| 4915 | * setting descriptor count of the first buffer. |
| 4916 | * This prevents an active DMA controller from reading the first DMA |
| 4917 | * buffers of a frame and stopping before the final buffers are filled. |
| 4918 | */ |
| 4919 | |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 4920 | info->tbuf_start = i = info->tbuf_current; |
| 4921 | |
| 4922 | while (size) { |
| 4923 | d = &info->tbufs[i]; |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 4924 | |
| 4925 | count = (unsigned short)((size > DMABUFSIZE) ? DMABUFSIZE : size); |
| 4926 | memcpy(d->buf, buf, count); |
| 4927 | |
| 4928 | size -= count; |
| 4929 | buf += count; |
| 4930 | |
Paul Fulghum | cb10dc9 | 2006-09-30 23:27:45 -0700 | [diff] [blame] | 4931 | /* |
| 4932 | * set EOF bit for last buffer of HDLC frame or |
| 4933 | * for every buffer in raw mode |
| 4934 | */ |
| 4935 | if ((!size && info->params.mode == MGSL_MODE_HDLC) || |
| 4936 | info->params.mode == MGSL_MODE_RAW) |
| 4937 | set_desc_eof(*d, 1); |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 4938 | else |
| 4939 | set_desc_eof(*d, 0); |
| 4940 | |
Paul Fulghum | de538eb | 2009-12-09 12:31:39 -0800 | [diff] [blame] | 4941 | /* set descriptor count for all but first buffer */ |
| 4942 | if (i != info->tbuf_start) |
| 4943 | set_desc_count(*d, count); |
Paul Fulghum | 403214d | 2008-07-22 11:21:55 +0100 | [diff] [blame] | 4944 | d->buf_count = count; |
Paul Fulghum | de538eb | 2009-12-09 12:31:39 -0800 | [diff] [blame] | 4945 | |
| 4946 | if (++i == info->tbuf_count) |
| 4947 | i = 0; |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 4948 | } |
| 4949 | |
| 4950 | info->tbuf_current = i; |
Paul Fulghum | de538eb | 2009-12-09 12:31:39 -0800 | [diff] [blame] | 4951 | |
| 4952 | /* set first buffer count to make new data visible to DMA controller */ |
| 4953 | d = &info->tbufs[info->tbuf_start]; |
| 4954 | set_desc_count(*d, d->buf_count); |
| 4955 | |
| 4956 | /* start transmitter if needed and update transmit timeout */ |
| 4957 | if (!info->tx_active) |
| 4958 | tx_start(info); |
| 4959 | update_tx_timer(info); |
| 4960 | |
| 4961 | return true; |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 4962 | } |
| 4963 | |
| 4964 | static int register_test(struct slgt_info *info) |
| 4965 | { |
| 4966 | static unsigned short patterns[] = |
| 4967 | {0x0000, 0xffff, 0xaaaa, 0x5555, 0x6969, 0x9696}; |
Kulikov Vasiliy | 7ea7c6d | 2010-06-28 15:54:48 +0400 | [diff] [blame] | 4968 | static unsigned int count = ARRAY_SIZE(patterns); |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 4969 | unsigned int i; |
| 4970 | int rc = 0; |
| 4971 | |
| 4972 | for (i=0 ; i < count ; i++) { |
| 4973 | wr_reg16(info, TIR, patterns[i]); |
| 4974 | wr_reg16(info, BDR, patterns[(i+1)%count]); |
| 4975 | if ((rd_reg16(info, TIR) != patterns[i]) || |
| 4976 | (rd_reg16(info, BDR) != patterns[(i+1)%count])) { |
| 4977 | rc = -ENODEV; |
| 4978 | break; |
| 4979 | } |
| 4980 | } |
Paul Fulghum | 0080b7a | 2006-03-28 01:56:15 -0800 | [diff] [blame] | 4981 | info->gpio_present = (rd_reg32(info, JCR) & BIT5) ? 1 : 0; |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 4982 | info->init_error = rc ? 0 : DiagStatus_AddressFailure; |
| 4983 | return rc; |
| 4984 | } |
| 4985 | |
| 4986 | static int irq_test(struct slgt_info *info) |
| 4987 | { |
| 4988 | unsigned long timeout; |
| 4989 | unsigned long flags; |
Alan Cox | 8fb06c7 | 2008-07-16 21:56:46 +0100 | [diff] [blame] | 4990 | struct tty_struct *oldtty = info->port.tty; |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 4991 | u32 speed = info->params.data_rate; |
| 4992 | |
| 4993 | info->params.data_rate = 921600; |
Alan Cox | 8fb06c7 | 2008-07-16 21:56:46 +0100 | [diff] [blame] | 4994 | info->port.tty = NULL; |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 4995 | |
| 4996 | spin_lock_irqsave(&info->lock, flags); |
| 4997 | async_mode(info); |
| 4998 | slgt_irq_on(info, IRQ_TXIDLE); |
| 4999 | |
| 5000 | /* enable transmitter */ |
| 5001 | wr_reg16(info, TCR, |
| 5002 | (unsigned short)(rd_reg16(info, TCR) | BIT1)); |
| 5003 | |
| 5004 | /* write one byte and wait for tx idle */ |
| 5005 | wr_reg16(info, TDR, 0); |
| 5006 | |
| 5007 | /* assume failure */ |
| 5008 | info->init_error = DiagStatus_IrqFailure; |
Joe Perches | 0fab6de | 2008-04-28 02:14:02 -0700 | [diff] [blame] | 5009 | info->irq_occurred = false; |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 5010 | |
| 5011 | spin_unlock_irqrestore(&info->lock, flags); |
| 5012 | |
| 5013 | timeout=100; |
| 5014 | while(timeout-- && !info->irq_occurred) |
| 5015 | msleep_interruptible(10); |
| 5016 | |
| 5017 | spin_lock_irqsave(&info->lock,flags); |
| 5018 | reset_port(info); |
| 5019 | spin_unlock_irqrestore(&info->lock,flags); |
| 5020 | |
| 5021 | info->params.data_rate = speed; |
Alan Cox | 8fb06c7 | 2008-07-16 21:56:46 +0100 | [diff] [blame] | 5022 | info->port.tty = oldtty; |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 5023 | |
| 5024 | info->init_error = info->irq_occurred ? 0 : DiagStatus_IrqFailure; |
| 5025 | return info->irq_occurred ? 0 : -ENODEV; |
| 5026 | } |
| 5027 | |
| 5028 | static int loopback_test_rx(struct slgt_info *info) |
| 5029 | { |
| 5030 | unsigned char *src, *dest; |
| 5031 | int count; |
| 5032 | |
| 5033 | if (desc_complete(info->rbufs[0])) { |
| 5034 | count = desc_count(info->rbufs[0]); |
| 5035 | src = info->rbufs[0].buf; |
| 5036 | dest = info->tmp_rbuf; |
| 5037 | |
| 5038 | for( ; count ; count-=2, src+=2) { |
| 5039 | /* src=data byte (src+1)=status byte */ |
| 5040 | if (!(*(src+1) & (BIT9 + BIT8))) { |
| 5041 | *dest = *src; |
| 5042 | dest++; |
| 5043 | info->tmp_rbuf_count++; |
| 5044 | } |
| 5045 | } |
| 5046 | DBGDATA(info, info->tmp_rbuf, info->tmp_rbuf_count, "rx"); |
| 5047 | return 1; |
| 5048 | } |
| 5049 | return 0; |
| 5050 | } |
| 5051 | |
| 5052 | static int loopback_test(struct slgt_info *info) |
| 5053 | { |
| 5054 | #define TESTFRAMESIZE 20 |
| 5055 | |
| 5056 | unsigned long timeout; |
| 5057 | u16 count = TESTFRAMESIZE; |
| 5058 | unsigned char buf[TESTFRAMESIZE]; |
| 5059 | int rc = -ENODEV; |
| 5060 | unsigned long flags; |
| 5061 | |
Alan Cox | 8fb06c7 | 2008-07-16 21:56:46 +0100 | [diff] [blame] | 5062 | struct tty_struct *oldtty = info->port.tty; |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 5063 | MGSL_PARAMS params; |
| 5064 | |
| 5065 | memcpy(¶ms, &info->params, sizeof(params)); |
| 5066 | |
| 5067 | info->params.mode = MGSL_MODE_ASYNC; |
| 5068 | info->params.data_rate = 921600; |
| 5069 | info->params.loopback = 1; |
Alan Cox | 8fb06c7 | 2008-07-16 21:56:46 +0100 | [diff] [blame] | 5070 | info->port.tty = NULL; |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 5071 | |
| 5072 | /* build and send transmit frame */ |
| 5073 | for (count = 0; count < TESTFRAMESIZE; ++count) |
| 5074 | buf[count] = (unsigned char)count; |
| 5075 | |
| 5076 | info->tmp_rbuf_count = 0; |
| 5077 | memset(info->tmp_rbuf, 0, TESTFRAMESIZE); |
| 5078 | |
| 5079 | /* program hardware for HDLC and enabled receiver */ |
| 5080 | spin_lock_irqsave(&info->lock,flags); |
| 5081 | async_mode(info); |
| 5082 | rx_start(info); |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 5083 | tx_load(info, buf, count); |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 5084 | spin_unlock_irqrestore(&info->lock, flags); |
| 5085 | |
| 5086 | /* wait for receive complete */ |
| 5087 | for (timeout = 100; timeout; --timeout) { |
| 5088 | msleep_interruptible(10); |
| 5089 | if (loopback_test_rx(info)) { |
| 5090 | rc = 0; |
| 5091 | break; |
| 5092 | } |
| 5093 | } |
| 5094 | |
| 5095 | /* verify received frame length and contents */ |
| 5096 | if (!rc && (info->tmp_rbuf_count != count || |
| 5097 | memcmp(buf, info->tmp_rbuf, count))) { |
| 5098 | rc = -ENODEV; |
| 5099 | } |
| 5100 | |
| 5101 | spin_lock_irqsave(&info->lock,flags); |
| 5102 | reset_adapter(info); |
| 5103 | spin_unlock_irqrestore(&info->lock,flags); |
| 5104 | |
| 5105 | memcpy(&info->params, ¶ms, sizeof(info->params)); |
Alan Cox | 8fb06c7 | 2008-07-16 21:56:46 +0100 | [diff] [blame] | 5106 | info->port.tty = oldtty; |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 5107 | |
| 5108 | info->init_error = rc ? DiagStatus_DmaFailure : 0; |
| 5109 | return rc; |
| 5110 | } |
| 5111 | |
| 5112 | static int adapter_test(struct slgt_info *info) |
| 5113 | { |
| 5114 | DBGINFO(("testing %s\n", info->device_name)); |
Paul Fulghum | 294dad0 | 2006-06-25 05:49:21 -0700 | [diff] [blame] | 5115 | if (register_test(info) < 0) { |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 5116 | printk("register test failure %s addr=%08X\n", |
| 5117 | info->device_name, info->phys_reg_addr); |
Paul Fulghum | 294dad0 | 2006-06-25 05:49:21 -0700 | [diff] [blame] | 5118 | } else if (irq_test(info) < 0) { |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 5119 | printk("IRQ test failure %s IRQ=%d\n", |
| 5120 | info->device_name, info->irq_level); |
Paul Fulghum | 294dad0 | 2006-06-25 05:49:21 -0700 | [diff] [blame] | 5121 | } else if (loopback_test(info) < 0) { |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 5122 | printk("loopback test failure %s\n", info->device_name); |
| 5123 | } |
| 5124 | return info->init_error; |
| 5125 | } |
| 5126 | |
| 5127 | /* |
| 5128 | * transmit timeout handler |
| 5129 | */ |
| 5130 | static void tx_timeout(unsigned long context) |
| 5131 | { |
| 5132 | struct slgt_info *info = (struct slgt_info*)context; |
| 5133 | unsigned long flags; |
| 5134 | |
| 5135 | DBGINFO(("%s tx_timeout\n", info->device_name)); |
| 5136 | if(info->tx_active && info->params.mode == MGSL_MODE_HDLC) { |
| 5137 | info->icount.txtimeout++; |
| 5138 | } |
| 5139 | spin_lock_irqsave(&info->lock,flags); |
Paul Fulghum | ce89294 | 2009-06-24 18:34:51 +0100 | [diff] [blame] | 5140 | tx_stop(info); |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 5141 | spin_unlock_irqrestore(&info->lock,flags); |
| 5142 | |
Paul Fulghum | af69c7f | 2006-12-06 20:40:24 -0800 | [diff] [blame] | 5143 | #if SYNCLINK_GENERIC_HDLC |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 5144 | if (info->netcount) |
| 5145 | hdlcdev_tx_done(info); |
| 5146 | else |
| 5147 | #endif |
| 5148 | bh_transmit(info); |
| 5149 | } |
| 5150 | |
| 5151 | /* |
| 5152 | * receive buffer polling timer |
| 5153 | */ |
| 5154 | static void rx_timeout(unsigned long context) |
| 5155 | { |
| 5156 | struct slgt_info *info = (struct slgt_info*)context; |
| 5157 | unsigned long flags; |
| 5158 | |
| 5159 | DBGINFO(("%s rx_timeout\n", info->device_name)); |
| 5160 | spin_lock_irqsave(&info->lock, flags); |
| 5161 | info->pending_bh |= BH_RECEIVE; |
| 5162 | spin_unlock_irqrestore(&info->lock, flags); |
David Howells | c402895 | 2006-11-22 14:57:56 +0000 | [diff] [blame] | 5163 | bh_handler(&info->task); |
Paul Fulghum | 705b6c7 | 2006-01-08 01:02:06 -0800 | [diff] [blame] | 5164 | } |
| 5165 | |