Bartlomiej Zolnierkiewicz | 327fa1c | 2009-03-24 23:22:47 +0100 | [diff] [blame] | 1 | |
| 2 | #include <linux/kernel.h> |
| 3 | #include <linux/ide.h> |
| 4 | #include <linux/delay.h> |
| 5 | |
| 6 | static ide_startstop_t ide_ata_error(ide_drive_t *drive, struct request *rq, |
| 7 | u8 stat, u8 err) |
| 8 | { |
| 9 | ide_hwif_t *hwif = drive->hwif; |
| 10 | |
| 11 | if ((stat & ATA_BUSY) || |
| 12 | ((stat & ATA_DF) && (drive->dev_flags & IDE_DFLAG_NOWERR) == 0)) { |
| 13 | /* other bits are useless when BUSY */ |
| 14 | rq->errors |= ERROR_RESET; |
| 15 | } else if (stat & ATA_ERR) { |
| 16 | /* err has different meaning on cdrom and tape */ |
| 17 | if (err == ATA_ABORTED) { |
| 18 | if ((drive->dev_flags & IDE_DFLAG_LBA) && |
| 19 | /* some newer drives don't support ATA_CMD_INIT_DEV_PARAMS */ |
| 20 | hwif->tp_ops->read_status(hwif) == ATA_CMD_INIT_DEV_PARAMS) |
| 21 | return ide_stopped; |
| 22 | } else if ((err & BAD_CRC) == BAD_CRC) { |
| 23 | /* UDMA crc error, just retry the operation */ |
| 24 | drive->crc_count++; |
| 25 | } else if (err & (ATA_BBK | ATA_UNC)) { |
| 26 | /* retries won't help these */ |
| 27 | rq->errors = ERROR_MAX; |
| 28 | } else if (err & ATA_TRK0NF) { |
| 29 | /* help it find track zero */ |
| 30 | rq->errors |= ERROR_RECAL; |
| 31 | } |
| 32 | } |
| 33 | |
| 34 | if ((stat & ATA_DRQ) && rq_data_dir(rq) == READ && |
| 35 | (hwif->host_flags & IDE_HFLAG_ERROR_STOPS_FIFO) == 0) { |
| 36 | int nsect = drive->mult_count ? drive->mult_count : 1; |
| 37 | |
| 38 | ide_pad_transfer(drive, READ, nsect * SECTOR_SIZE); |
| 39 | } |
| 40 | |
| 41 | if (rq->errors >= ERROR_MAX || blk_noretry_request(rq)) { |
| 42 | ide_kill_rq(drive, rq); |
| 43 | return ide_stopped; |
| 44 | } |
| 45 | |
| 46 | if (hwif->tp_ops->read_status(hwif) & (ATA_BUSY | ATA_DRQ)) |
| 47 | rq->errors |= ERROR_RESET; |
| 48 | |
| 49 | if ((rq->errors & ERROR_RESET) == ERROR_RESET) { |
| 50 | ++rq->errors; |
| 51 | return ide_do_reset(drive); |
| 52 | } |
| 53 | |
| 54 | if ((rq->errors & ERROR_RECAL) == ERROR_RECAL) |
Bartlomiej Zolnierkiewicz | ca1b96e | 2009-05-17 19:12:21 +0200 | [diff] [blame] | 55 | drive->special_flags |= IDE_SFLAG_RECALIBRATE; |
Bartlomiej Zolnierkiewicz | 327fa1c | 2009-03-24 23:22:47 +0100 | [diff] [blame] | 56 | |
| 57 | ++rq->errors; |
| 58 | |
| 59 | return ide_stopped; |
| 60 | } |
| 61 | |
| 62 | static ide_startstop_t ide_atapi_error(ide_drive_t *drive, struct request *rq, |
| 63 | u8 stat, u8 err) |
| 64 | { |
| 65 | ide_hwif_t *hwif = drive->hwif; |
| 66 | |
| 67 | if ((stat & ATA_BUSY) || |
| 68 | ((stat & ATA_DF) && (drive->dev_flags & IDE_DFLAG_NOWERR) == 0)) { |
| 69 | /* other bits are useless when BUSY */ |
| 70 | rq->errors |= ERROR_RESET; |
| 71 | } else { |
| 72 | /* add decoding error stuff */ |
| 73 | } |
| 74 | |
| 75 | if (hwif->tp_ops->read_status(hwif) & (ATA_BUSY | ATA_DRQ)) |
| 76 | /* force an abort */ |
| 77 | hwif->tp_ops->exec_command(hwif, ATA_CMD_IDLEIMMEDIATE); |
| 78 | |
| 79 | if (rq->errors >= ERROR_MAX) { |
| 80 | ide_kill_rq(drive, rq); |
| 81 | } else { |
| 82 | if ((rq->errors & ERROR_RESET) == ERROR_RESET) { |
| 83 | ++rq->errors; |
| 84 | return ide_do_reset(drive); |
| 85 | } |
| 86 | ++rq->errors; |
| 87 | } |
| 88 | |
| 89 | return ide_stopped; |
| 90 | } |
| 91 | |
| 92 | static ide_startstop_t __ide_error(ide_drive_t *drive, struct request *rq, |
| 93 | u8 stat, u8 err) |
| 94 | { |
| 95 | if (drive->media == ide_disk) |
| 96 | return ide_ata_error(drive, rq, stat, err); |
| 97 | return ide_atapi_error(drive, rq, stat, err); |
| 98 | } |
| 99 | |
| 100 | /** |
| 101 | * ide_error - handle an error on the IDE |
| 102 | * @drive: drive the error occurred on |
| 103 | * @msg: message to report |
| 104 | * @stat: status bits |
| 105 | * |
| 106 | * ide_error() takes action based on the error returned by the drive. |
| 107 | * For normal I/O that may well include retries. We deal with |
| 108 | * both new-style (taskfile) and old style command handling here. |
| 109 | * In the case of taskfile command handling there is work left to |
| 110 | * do |
| 111 | */ |
| 112 | |
| 113 | ide_startstop_t ide_error(ide_drive_t *drive, const char *msg, u8 stat) |
| 114 | { |
| 115 | struct request *rq; |
| 116 | u8 err; |
| 117 | |
| 118 | err = ide_dump_status(drive, msg, stat); |
| 119 | |
| 120 | rq = drive->hwif->rq; |
| 121 | if (rq == NULL) |
| 122 | return ide_stopped; |
| 123 | |
| 124 | /* retry only "normal" I/O: */ |
| 125 | if (!blk_fs_request(rq)) { |
Bartlomiej Zolnierkiewicz | a09485d | 2009-03-27 12:46:31 +0100 | [diff] [blame] | 126 | if (rq->cmd_type == REQ_TYPE_ATA_TASKFILE) { |
Bartlomiej Zolnierkiewicz | 22aa4b3 | 2009-03-27 12:46:37 +0100 | [diff] [blame] | 127 | struct ide_cmd *cmd = rq->special; |
Bartlomiej Zolnierkiewicz | a09485d | 2009-03-27 12:46:31 +0100 | [diff] [blame] | 128 | |
Bartlomiej Zolnierkiewicz | 22aa4b3 | 2009-03-27 12:46:37 +0100 | [diff] [blame] | 129 | if (cmd) |
| 130 | ide_complete_cmd(drive, cmd, stat, err); |
Bartlomiej Zolnierkiewicz | a09485d | 2009-03-27 12:46:31 +0100 | [diff] [blame] | 131 | } else if (blk_pm_request(rq)) { |
Bartlomiej Zolnierkiewicz | 6902a53 | 2009-03-27 12:46:43 +0100 | [diff] [blame] | 132 | rq->errors = 1; |
Bartlomiej Zolnierkiewicz | a09485d | 2009-03-27 12:46:31 +0100 | [diff] [blame] | 133 | ide_complete_pm_rq(drive, rq); |
| 134 | return ide_stopped; |
| 135 | } |
Bartlomiej Zolnierkiewicz | 6902a53 | 2009-03-27 12:46:43 +0100 | [diff] [blame] | 136 | rq->errors = err; |
Bartlomiej Zolnierkiewicz | f974b19 | 2009-03-27 12:46:44 +0100 | [diff] [blame] | 137 | ide_complete_rq(drive, err ? -EIO : 0, blk_rq_bytes(rq)); |
Bartlomiej Zolnierkiewicz | 327fa1c | 2009-03-24 23:22:47 +0100 | [diff] [blame] | 138 | return ide_stopped; |
| 139 | } |
| 140 | |
| 141 | return __ide_error(drive, rq, stat, err); |
| 142 | } |
| 143 | EXPORT_SYMBOL_GPL(ide_error); |
| 144 | |
| 145 | static inline void ide_complete_drive_reset(ide_drive_t *drive, int err) |
| 146 | { |
| 147 | struct request *rq = drive->hwif->rq; |
| 148 | |
Bartlomiej Zolnierkiewicz | 89f78b3 | 2009-03-27 12:46:43 +0100 | [diff] [blame] | 149 | if (rq && blk_special_request(rq) && rq->cmd[0] == REQ_DRIVE_RESET) { |
| 150 | if (err <= 0 && rq->errors == 0) |
| 151 | rq->errors = -EIO; |
Bartlomiej Zolnierkiewicz | 5e95524 | 2009-06-23 11:27:27 +0000 | [diff] [blame] | 152 | ide_complete_rq(drive, err ? err : 0, blk_rq_bytes(rq)); |
Bartlomiej Zolnierkiewicz | 89f78b3 | 2009-03-27 12:46:43 +0100 | [diff] [blame] | 153 | } |
Bartlomiej Zolnierkiewicz | 327fa1c | 2009-03-24 23:22:47 +0100 | [diff] [blame] | 154 | } |
| 155 | |
| 156 | /* needed below */ |
| 157 | static ide_startstop_t do_reset1(ide_drive_t *, int); |
| 158 | |
| 159 | /* |
| 160 | * atapi_reset_pollfunc() gets invoked to poll the interface for completion |
| 161 | * every 50ms during an atapi drive reset operation. If the drive has not yet |
| 162 | * responded, and we have not yet hit our maximum waiting time, then the timer |
| 163 | * is restarted for another 50ms. |
| 164 | */ |
| 165 | static ide_startstop_t atapi_reset_pollfunc(ide_drive_t *drive) |
| 166 | { |
| 167 | ide_hwif_t *hwif = drive->hwif; |
Sergei Shtylyov | fdd88f0 | 2009-03-31 20:15:33 +0200 | [diff] [blame] | 168 | const struct ide_tp_ops *tp_ops = hwif->tp_ops; |
Bartlomiej Zolnierkiewicz | 327fa1c | 2009-03-24 23:22:47 +0100 | [diff] [blame] | 169 | u8 stat; |
| 170 | |
Sergei Shtylyov | fdd88f0 | 2009-03-31 20:15:33 +0200 | [diff] [blame] | 171 | tp_ops->dev_select(drive); |
Bartlomiej Zolnierkiewicz | 327fa1c | 2009-03-24 23:22:47 +0100 | [diff] [blame] | 172 | udelay(10); |
Sergei Shtylyov | fdd88f0 | 2009-03-31 20:15:33 +0200 | [diff] [blame] | 173 | stat = tp_ops->read_status(hwif); |
Bartlomiej Zolnierkiewicz | 327fa1c | 2009-03-24 23:22:47 +0100 | [diff] [blame] | 174 | |
| 175 | if (OK_STAT(stat, 0, ATA_BUSY)) |
| 176 | printk(KERN_INFO "%s: ATAPI reset complete\n", drive->name); |
| 177 | else { |
| 178 | if (time_before(jiffies, hwif->poll_timeout)) { |
Bartlomiej Zolnierkiewicz | 60c0cd0 | 2009-03-27 12:46:46 +0100 | [diff] [blame] | 179 | ide_set_handler(drive, &atapi_reset_pollfunc, HZ/20); |
Bartlomiej Zolnierkiewicz | 327fa1c | 2009-03-24 23:22:47 +0100 | [diff] [blame] | 180 | /* continue polling */ |
| 181 | return ide_started; |
| 182 | } |
| 183 | /* end of polling */ |
| 184 | hwif->polling = 0; |
| 185 | printk(KERN_ERR "%s: ATAPI reset timed-out, status=0x%02x\n", |
| 186 | drive->name, stat); |
| 187 | /* do it the old fashioned way */ |
| 188 | return do_reset1(drive, 1); |
| 189 | } |
| 190 | /* done polling */ |
| 191 | hwif->polling = 0; |
| 192 | ide_complete_drive_reset(drive, 0); |
| 193 | return ide_stopped; |
| 194 | } |
| 195 | |
| 196 | static void ide_reset_report_error(ide_hwif_t *hwif, u8 err) |
| 197 | { |
| 198 | static const char *err_master_vals[] = |
| 199 | { NULL, "passed", "formatter device error", |
| 200 | "sector buffer error", "ECC circuitry error", |
| 201 | "controlling MPU error" }; |
| 202 | |
| 203 | u8 err_master = err & 0x7f; |
| 204 | |
| 205 | printk(KERN_ERR "%s: reset: master: ", hwif->name); |
| 206 | if (err_master && err_master < 6) |
| 207 | printk(KERN_CONT "%s", err_master_vals[err_master]); |
| 208 | else |
| 209 | printk(KERN_CONT "error (0x%02x?)", err); |
| 210 | if (err & 0x80) |
| 211 | printk(KERN_CONT "; slave: failed"); |
| 212 | printk(KERN_CONT "\n"); |
| 213 | } |
| 214 | |
| 215 | /* |
| 216 | * reset_pollfunc() gets invoked to poll the interface for completion every 50ms |
| 217 | * during an ide reset operation. If the drives have not yet responded, |
| 218 | * and we have not yet hit our maximum waiting time, then the timer is restarted |
| 219 | * for another 50ms. |
| 220 | */ |
| 221 | static ide_startstop_t reset_pollfunc(ide_drive_t *drive) |
| 222 | { |
| 223 | ide_hwif_t *hwif = drive->hwif; |
| 224 | const struct ide_port_ops *port_ops = hwif->port_ops; |
| 225 | u8 tmp; |
| 226 | int err = 0; |
| 227 | |
| 228 | if (port_ops && port_ops->reset_poll) { |
| 229 | err = port_ops->reset_poll(drive); |
| 230 | if (err) { |
| 231 | printk(KERN_ERR "%s: host reset_poll failure for %s.\n", |
| 232 | hwif->name, drive->name); |
| 233 | goto out; |
| 234 | } |
| 235 | } |
| 236 | |
| 237 | tmp = hwif->tp_ops->read_status(hwif); |
| 238 | |
| 239 | if (!OK_STAT(tmp, 0, ATA_BUSY)) { |
| 240 | if (time_before(jiffies, hwif->poll_timeout)) { |
Bartlomiej Zolnierkiewicz | 60c0cd0 | 2009-03-27 12:46:46 +0100 | [diff] [blame] | 241 | ide_set_handler(drive, &reset_pollfunc, HZ/20); |
Bartlomiej Zolnierkiewicz | 327fa1c | 2009-03-24 23:22:47 +0100 | [diff] [blame] | 242 | /* continue polling */ |
| 243 | return ide_started; |
| 244 | } |
| 245 | printk(KERN_ERR "%s: reset timed-out, status=0x%02x\n", |
| 246 | hwif->name, tmp); |
| 247 | drive->failures++; |
| 248 | err = -EIO; |
| 249 | } else { |
| 250 | tmp = ide_read_error(drive); |
| 251 | |
| 252 | if (tmp == 1) { |
| 253 | printk(KERN_INFO "%s: reset: success\n", hwif->name); |
| 254 | drive->failures = 0; |
| 255 | } else { |
| 256 | ide_reset_report_error(hwif, tmp); |
| 257 | drive->failures++; |
| 258 | err = -EIO; |
| 259 | } |
| 260 | } |
| 261 | out: |
| 262 | hwif->polling = 0; /* done polling */ |
| 263 | ide_complete_drive_reset(drive, err); |
| 264 | return ide_stopped; |
| 265 | } |
| 266 | |
| 267 | static void ide_disk_pre_reset(ide_drive_t *drive) |
| 268 | { |
| 269 | int legacy = (drive->id[ATA_ID_CFS_ENABLE_2] & 0x0400) ? 0 : 1; |
| 270 | |
Bartlomiej Zolnierkiewicz | ca1b96e | 2009-05-17 19:12:21 +0200 | [diff] [blame] | 271 | drive->special_flags = |
| 272 | legacy ? (IDE_SFLAG_SET_GEOMETRY | IDE_SFLAG_RECALIBRATE) : 0; |
Bartlomiej Zolnierkiewicz | 327fa1c | 2009-03-24 23:22:47 +0100 | [diff] [blame] | 273 | |
| 274 | drive->mult_count = 0; |
| 275 | drive->dev_flags &= ~IDE_DFLAG_PARKED; |
| 276 | |
| 277 | if ((drive->dev_flags & IDE_DFLAG_KEEP_SETTINGS) == 0 && |
| 278 | (drive->dev_flags & IDE_DFLAG_USING_DMA) == 0) |
| 279 | drive->mult_req = 0; |
| 280 | |
| 281 | if (drive->mult_req != drive->mult_count) |
Bartlomiej Zolnierkiewicz | ca1b96e | 2009-05-17 19:12:21 +0200 | [diff] [blame] | 282 | drive->special_flags |= IDE_SFLAG_SET_MULTMODE; |
Bartlomiej Zolnierkiewicz | 327fa1c | 2009-03-24 23:22:47 +0100 | [diff] [blame] | 283 | } |
| 284 | |
| 285 | static void pre_reset(ide_drive_t *drive) |
| 286 | { |
| 287 | const struct ide_port_ops *port_ops = drive->hwif->port_ops; |
| 288 | |
| 289 | if (drive->media == ide_disk) |
| 290 | ide_disk_pre_reset(drive); |
| 291 | else |
| 292 | drive->dev_flags |= IDE_DFLAG_POST_RESET; |
| 293 | |
| 294 | if (drive->dev_flags & IDE_DFLAG_USING_DMA) { |
| 295 | if (drive->crc_count) |
| 296 | ide_check_dma_crc(drive); |
| 297 | else |
| 298 | ide_dma_off(drive); |
| 299 | } |
| 300 | |
| 301 | if ((drive->dev_flags & IDE_DFLAG_KEEP_SETTINGS) == 0) { |
| 302 | if ((drive->dev_flags & IDE_DFLAG_USING_DMA) == 0) { |
| 303 | drive->dev_flags &= ~IDE_DFLAG_UNMASK; |
| 304 | drive->io_32bit = 0; |
| 305 | } |
| 306 | return; |
| 307 | } |
| 308 | |
| 309 | if (port_ops && port_ops->pre_reset) |
| 310 | port_ops->pre_reset(drive); |
| 311 | |
| 312 | if (drive->current_speed != 0xff) |
| 313 | drive->desired_speed = drive->current_speed; |
| 314 | drive->current_speed = 0xff; |
| 315 | } |
| 316 | |
| 317 | /* |
| 318 | * do_reset1() attempts to recover a confused drive by resetting it. |
| 319 | * Unfortunately, resetting a disk drive actually resets all devices on |
| 320 | * the same interface, so it can really be thought of as resetting the |
| 321 | * interface rather than resetting the drive. |
| 322 | * |
| 323 | * ATAPI devices have their own reset mechanism which allows them to be |
| 324 | * individually reset without clobbering other devices on the same interface. |
| 325 | * |
| 326 | * Unfortunately, the IDE interface does not generate an interrupt to let |
| 327 | * us know when the reset operation has finished, so we must poll for this. |
| 328 | * Equally poor, though, is the fact that this may a very long time to complete, |
| 329 | * (up to 30 seconds worstcase). So, instead of busy-waiting here for it, |
| 330 | * we set a timer to poll at 50ms intervals. |
| 331 | */ |
| 332 | static ide_startstop_t do_reset1(ide_drive_t *drive, int do_not_try_atapi) |
| 333 | { |
| 334 | ide_hwif_t *hwif = drive->hwif; |
| 335 | struct ide_io_ports *io_ports = &hwif->io_ports; |
| 336 | const struct ide_tp_ops *tp_ops = hwif->tp_ops; |
| 337 | const struct ide_port_ops *port_ops; |
| 338 | ide_drive_t *tdrive; |
| 339 | unsigned long flags, timeout; |
| 340 | int i; |
| 341 | DEFINE_WAIT(wait); |
| 342 | |
| 343 | spin_lock_irqsave(&hwif->lock, flags); |
| 344 | |
| 345 | /* We must not reset with running handlers */ |
| 346 | BUG_ON(hwif->handler != NULL); |
| 347 | |
| 348 | /* For an ATAPI device, first try an ATAPI SRST. */ |
| 349 | if (drive->media != ide_disk && !do_not_try_atapi) { |
| 350 | pre_reset(drive); |
Sergei Shtylyov | fdd88f0 | 2009-03-31 20:15:33 +0200 | [diff] [blame] | 351 | tp_ops->dev_select(drive); |
Bartlomiej Zolnierkiewicz | 327fa1c | 2009-03-24 23:22:47 +0100 | [diff] [blame] | 352 | udelay(20); |
| 353 | tp_ops->exec_command(hwif, ATA_CMD_DEV_RESET); |
| 354 | ndelay(400); |
| 355 | hwif->poll_timeout = jiffies + WAIT_WORSTCASE; |
| 356 | hwif->polling = 1; |
Bartlomiej Zolnierkiewicz | 60c0cd0 | 2009-03-27 12:46:46 +0100 | [diff] [blame] | 357 | __ide_set_handler(drive, &atapi_reset_pollfunc, HZ/20); |
Bartlomiej Zolnierkiewicz | 327fa1c | 2009-03-24 23:22:47 +0100 | [diff] [blame] | 358 | spin_unlock_irqrestore(&hwif->lock, flags); |
| 359 | return ide_started; |
| 360 | } |
| 361 | |
| 362 | /* We must not disturb devices in the IDE_DFLAG_PARKED state. */ |
| 363 | do { |
| 364 | unsigned long now; |
| 365 | |
| 366 | prepare_to_wait(&ide_park_wq, &wait, TASK_UNINTERRUPTIBLE); |
| 367 | timeout = jiffies; |
| 368 | ide_port_for_each_present_dev(i, tdrive, hwif) { |
| 369 | if ((tdrive->dev_flags & IDE_DFLAG_PARKED) && |
| 370 | time_after(tdrive->sleep, timeout)) |
| 371 | timeout = tdrive->sleep; |
| 372 | } |
| 373 | |
| 374 | now = jiffies; |
| 375 | if (time_before_eq(timeout, now)) |
| 376 | break; |
| 377 | |
| 378 | spin_unlock_irqrestore(&hwif->lock, flags); |
| 379 | timeout = schedule_timeout_uninterruptible(timeout - now); |
| 380 | spin_lock_irqsave(&hwif->lock, flags); |
| 381 | } while (timeout); |
| 382 | finish_wait(&ide_park_wq, &wait); |
| 383 | |
| 384 | /* |
| 385 | * First, reset any device state data we were maintaining |
| 386 | * for any of the drives on this interface. |
| 387 | */ |
| 388 | ide_port_for_each_dev(i, tdrive, hwif) |
| 389 | pre_reset(tdrive); |
| 390 | |
| 391 | if (io_ports->ctl_addr == 0) { |
| 392 | spin_unlock_irqrestore(&hwif->lock, flags); |
| 393 | ide_complete_drive_reset(drive, -ENXIO); |
| 394 | return ide_stopped; |
| 395 | } |
| 396 | |
| 397 | /* |
| 398 | * Note that we also set nIEN while resetting the device, |
| 399 | * to mask unwanted interrupts from the interface during the reset. |
| 400 | * However, due to the design of PC hardware, this will cause an |
| 401 | * immediate interrupt due to the edge transition it produces. |
| 402 | * This single interrupt gives us a "fast poll" for drives that |
| 403 | * recover from reset very quickly, saving us the first 50ms wait time. |
Bartlomiej Zolnierkiewicz | 327fa1c | 2009-03-24 23:22:47 +0100 | [diff] [blame] | 404 | */ |
| 405 | /* set SRST and nIEN */ |
Sergei Shtylyov | ecf3a31 | 2009-03-31 20:15:30 +0200 | [diff] [blame] | 406 | tp_ops->write_devctl(hwif, ATA_SRST | ATA_NIEN | ATA_DEVCTL_OBS); |
Bartlomiej Zolnierkiewicz | 327fa1c | 2009-03-24 23:22:47 +0100 | [diff] [blame] | 407 | /* more than enough time */ |
| 408 | udelay(10); |
| 409 | /* clear SRST, leave nIEN (unless device is on the quirk list) */ |
Bartlomiej Zolnierkiewicz | 734affd | 2009-06-07 15:37:10 +0200 | [diff] [blame] | 410 | tp_ops->write_devctl(hwif, |
| 411 | ((drive->dev_flags & IDE_DFLAG_NIEN_QUIRK) ? 0 : ATA_NIEN) | |
| 412 | ATA_DEVCTL_OBS); |
Bartlomiej Zolnierkiewicz | 327fa1c | 2009-03-24 23:22:47 +0100 | [diff] [blame] | 413 | /* more than enough time */ |
| 414 | udelay(10); |
| 415 | hwif->poll_timeout = jiffies + WAIT_WORSTCASE; |
| 416 | hwif->polling = 1; |
Bartlomiej Zolnierkiewicz | 60c0cd0 | 2009-03-27 12:46:46 +0100 | [diff] [blame] | 417 | __ide_set_handler(drive, &reset_pollfunc, HZ/20); |
Bartlomiej Zolnierkiewicz | 327fa1c | 2009-03-24 23:22:47 +0100 | [diff] [blame] | 418 | |
| 419 | /* |
| 420 | * Some weird controller like resetting themselves to a strange |
| 421 | * state when the disks are reset this way. At least, the Winbond |
| 422 | * 553 documentation says that |
| 423 | */ |
| 424 | port_ops = hwif->port_ops; |
| 425 | if (port_ops && port_ops->resetproc) |
| 426 | port_ops->resetproc(drive); |
| 427 | |
| 428 | spin_unlock_irqrestore(&hwif->lock, flags); |
| 429 | return ide_started; |
| 430 | } |
| 431 | |
| 432 | /* |
| 433 | * ide_do_reset() is the entry point to the drive/interface reset code. |
| 434 | */ |
| 435 | |
| 436 | ide_startstop_t ide_do_reset(ide_drive_t *drive) |
| 437 | { |
| 438 | return do_reset1(drive, 0); |
| 439 | } |
| 440 | EXPORT_SYMBOL(ide_do_reset); |