1 #include <linux/module.h>
2 #include <linux/types.h>
3 #include <linux/string.h>
4 #include <linux/kernel.h>
5 #include <linux/timer.h>
7 #include <linux/interrupt.h>
8 #include <linux/major.h>
9 #include <linux/errno.h>
10 #include <linux/genhd.h>
11 #include <linux/blkpg.h>
12 #include <linux/slab.h>
13 #include <linux/pci.h>
14 #include <linux/delay.h>
15 #include <linux/hdreg.h>
16 #include <linux/ide.h>
17 #include <linux/bitops.h>
19 #include <asm/byteorder.h>
21 #include <asm/uaccess.h>
25 * IDE library routines. These are plug in code that most
26 * drivers can use but occasionally may be weird enough
27 * to want to do their own thing with
29 * Add common non I/O op stuff here. Make sure it has proper
30 * kernel-doc function headers or your patch will be rejected
33 static const char *udma_str[] =
34 { "UDMA/16", "UDMA/25", "UDMA/33", "UDMA/44",
35 "UDMA/66", "UDMA/100", "UDMA/133", "UDMA7" };
36 static const char *mwdma_str[] =
37 { "MWDMA0", "MWDMA1", "MWDMA2" };
38 static const char *swdma_str[] =
39 { "SWDMA0", "SWDMA1", "SWDMA2" };
40 static const char *pio_str[] =
41 { "PIO0", "PIO1", "PIO2", "PIO3", "PIO4", "PIO5" };
44 * ide_xfer_verbose - return IDE mode names
45 * @mode: transfer mode
47 * Returns a constant string giving the name of the mode
51 const char *ide_xfer_verbose(u8 mode)
56 if (mode >= XFER_UDMA_0 && mode <= XFER_UDMA_7)
58 else if (mode >= XFER_MW_DMA_0 && mode <= XFER_MW_DMA_2)
60 else if (mode >= XFER_SW_DMA_0 && mode <= XFER_SW_DMA_2)
62 else if (mode >= XFER_PIO_0 && mode <= XFER_PIO_5)
64 else if (mode == XFER_PIO_SLOW)
72 EXPORT_SYMBOL(ide_xfer_verbose);
75 * ide_rate_filter - filter transfer mode
77 * @speed: desired speed
79 * Given the available transfer modes this function returns
80 * the best available speed at or below the speed requested.
82 * TODO: check device PIO capabilities
85 static u8 ide_rate_filter(ide_drive_t *drive, u8 speed)
87 ide_hwif_t *hwif = drive->hwif;
88 u8 mode = ide_find_dma_mode(drive, speed);
92 mode = fls(hwif->pio_mask) - 1 + XFER_PIO_0;
97 // printk("%s: mode 0x%02x, speed 0x%02x\n", __FUNCTION__, mode, speed);
99 return min(speed, mode);
103 * Standard (generic) timings for PIO modes, from ATA2 specification.
104 * These timings are for access to the IDE data port register *only*.
105 * Some drives may specify a mode, while also specifying a different
106 * value for cycle_time (from drive identification data).
108 const ide_pio_timings_t ide_pio_timings[6] = {
109 { 70, 165, 600 }, /* PIO Mode 0 */
110 { 50, 125, 383 }, /* PIO Mode 1 */
111 { 30, 100, 240 }, /* PIO Mode 2 */
112 { 30, 80, 180 }, /* PIO Mode 3 with IORDY */
113 { 25, 70, 120 }, /* PIO Mode 4 with IORDY */
114 { 20, 50, 100 } /* PIO Mode 5 with IORDY (nonstandard) */
117 EXPORT_SYMBOL_GPL(ide_pio_timings);
120 * Shared data/functions for determining best PIO mode for an IDE drive.
121 * Most of this stuff originally lived in cmd640.c, and changes to the
122 * ide_pio_blacklist[] table should be made with EXTREME CAUTION to avoid
123 * breaking the fragile cmd640.c support.
127 * Black list. Some drives incorrectly report their maximal PIO mode,
128 * at least in respect to CMD640. Here we keep info on some known drives.
130 static struct ide_pio_info {
133 } ide_pio_blacklist [] = {
134 /* { "Conner Peripherals 1275MB - CFS1275A", 4 }, */
135 { "Conner Peripherals 540MB - CFS540A", 3 },
143 { "WDC AC21200", 4 },
150 /* { "WDC AC21000", 4 }, */
151 { "WDC AC31000", 3 },
152 { "WDC AC31200", 3 },
153 /* { "WDC AC31600", 4 }, */
155 { "Maxtor 7131 AT", 1 },
156 { "Maxtor 7171 AT", 1 },
157 { "Maxtor 7213 AT", 1 },
158 { "Maxtor 7245 AT", 1 },
159 { "Maxtor 7345 AT", 1 },
160 { "Maxtor 7546 AT", 3 },
161 { "Maxtor 7540 AV", 3 },
163 { "SAMSUNG SHD-3121A", 1 },
164 { "SAMSUNG SHD-3122A", 1 },
165 { "SAMSUNG SHD-3172A", 1 },
167 /* { "ST51080A", 4 },
183 { "ST3491A", 1 }, /* reports 3, should be 1 or 2 (depending on */
184 /* drive) according to Seagates FIND-ATA program */
186 { "QUANTUM ELS127A", 0 },
187 { "QUANTUM ELS170A", 0 },
188 { "QUANTUM LPS240A", 0 },
189 { "QUANTUM LPS210A", 3 },
190 { "QUANTUM LPS270A", 3 },
191 { "QUANTUM LPS365A", 3 },
192 { "QUANTUM LPS540A", 3 },
193 { "QUANTUM LIGHTNING 540A", 3 },
194 { "QUANTUM LIGHTNING 730A", 3 },
196 { "QUANTUM FIREBALL_540", 3 }, /* Older Quantum Fireballs don't work */
197 { "QUANTUM FIREBALL_640", 3 },
198 { "QUANTUM FIREBALL_1080", 3 },
199 { "QUANTUM FIREBALL_1280", 3 },
204 * ide_scan_pio_blacklist - check for a blacklisted drive
205 * @model: Drive model string
207 * This routine searches the ide_pio_blacklist for an entry
208 * matching the start/whole of the supplied model name.
210 * Returns -1 if no match found.
211 * Otherwise returns the recommended PIO mode from ide_pio_blacklist[].
214 static int ide_scan_pio_blacklist (char *model)
216 struct ide_pio_info *p;
218 for (p = ide_pio_blacklist; p->name != NULL; p++) {
219 if (strncmp(p->name, model, strlen(p->name)) == 0)
225 unsigned int ide_pio_cycle_time(ide_drive_t *drive, u8 pio)
227 struct hd_driveid *id = drive->id;
230 if (id->field_valid & 2) {
231 if (id->capability & 8)
232 cycle_time = id->eide_pio_iordy;
234 cycle_time = id->eide_pio;
237 /* conservative "downgrade" for all pre-ATA2 drives */
239 if (cycle_time && cycle_time < ide_pio_timings[pio].cycle_time)
240 cycle_time = 0; /* use standard timing */
243 return cycle_time ? cycle_time : ide_pio_timings[pio].cycle_time;
246 EXPORT_SYMBOL_GPL(ide_pio_cycle_time);
249 * ide_get_best_pio_mode - get PIO mode from drive
250 * @drive: drive to consider
251 * @mode_wanted: preferred mode
252 * @max_mode: highest allowed mode
254 * This routine returns the recommended PIO settings for a given drive,
255 * based on the drive->id information and the ide_pio_blacklist[].
257 * Drive PIO mode is auto-selected if 255 is passed as mode_wanted.
258 * This is used by most chipset support modules when "auto-tuning".
261 u8 ide_get_best_pio_mode (ide_drive_t *drive, u8 mode_wanted, u8 max_mode)
264 struct hd_driveid* id = drive->id;
267 if (mode_wanted != 255)
268 return min_t(u8, mode_wanted, max_mode);
270 if ((drive->hwif->host_flags & IDE_HFLAG_PIO_NO_BLACKLIST) == 0 &&
271 (pio_mode = ide_scan_pio_blacklist(id->model)) != -1) {
272 printk(KERN_INFO "%s: is on PIO blacklist\n", drive->name);
275 if (pio_mode > 2) { /* 2 is maximum allowed tPIO value */
279 if (id->field_valid & 2) { /* drive implements ATA2? */
280 if (id->capability & 8) { /* IORDY supported? */
281 if (id->eide_pio_modes & 7) {
283 if (id->eide_pio_modes & 4)
285 else if (id->eide_pio_modes & 2)
294 printk(KERN_INFO "%s: tPIO > 2, assuming tPIO = 2\n",
298 * Conservative "downgrade" for all pre-ATA2 drives
300 if ((drive->hwif->host_flags & IDE_HFLAG_PIO_NO_DOWNGRADE) == 0 &&
301 pio_mode && pio_mode < 4) {
303 printk(KERN_INFO "%s: applying conservative "
304 "PIO \"downgrade\"\n", drive->name);
308 if (pio_mode > max_mode)
314 EXPORT_SYMBOL_GPL(ide_get_best_pio_mode);
316 /* req_pio == "255" for auto-tune */
317 void ide_set_pio(ide_drive_t *drive, u8 req_pio)
319 ide_hwif_t *hwif = drive->hwif;
322 if (hwif->set_pio_mode == NULL)
325 BUG_ON(hwif->pio_mask == 0x00);
327 host_pio = fls(hwif->pio_mask) - 1;
329 pio = ide_get_best_pio_mode(drive, req_pio, host_pio);
333 * - report device max PIO mode
334 * - check req_pio != 255 against device max PIO mode
336 printk(KERN_DEBUG "%s: host max PIO%d wanted PIO%d%s selected PIO%d\n",
337 drive->name, host_pio, req_pio,
338 req_pio == 255 ? "(auto-tune)" : "", pio);
340 (void)ide_set_pio_mode(drive, XFER_PIO_0 + pio);
343 EXPORT_SYMBOL_GPL(ide_set_pio);
346 * ide_toggle_bounce - handle bounce buffering
347 * @drive: drive to update
348 * @on: on/off boolean
350 * Enable or disable bounce buffering for the device. Drives move
351 * between PIO and DMA and that changes the rules we need.
354 void ide_toggle_bounce(ide_drive_t *drive, int on)
356 u64 addr = BLK_BOUNCE_HIGH; /* dma64_addr_t */
358 if (!PCI_DMA_BUS_IS_PHYS) {
359 addr = BLK_BOUNCE_ANY;
360 } else if (on && drive->media == ide_disk) {
361 if (HWIF(drive)->pci_dev)
362 addr = HWIF(drive)->pci_dev->dma_mask;
366 blk_queue_bounce_limit(drive->queue, addr);
369 int ide_set_pio_mode(ide_drive_t *drive, const u8 mode)
371 ide_hwif_t *hwif = drive->hwif;
373 if (hwif->set_pio_mode == NULL)
377 * TODO: temporary hack for some legacy host drivers that didn't
378 * set transfer mode on the device in ->set_pio_mode method...
380 if (hwif->set_dma_mode == NULL) {
381 hwif->set_pio_mode(drive, mode - XFER_PIO_0);
385 if (hwif->host_flags & IDE_HFLAG_POST_SET_MODE) {
386 if (ide_config_drive_speed(drive, mode))
388 hwif->set_pio_mode(drive, mode - XFER_PIO_0);
391 hwif->set_pio_mode(drive, mode - XFER_PIO_0);
392 return ide_config_drive_speed(drive, mode);
396 int ide_set_dma_mode(ide_drive_t *drive, const u8 mode)
398 ide_hwif_t *hwif = drive->hwif;
400 if (hwif->set_dma_mode == NULL)
403 if (hwif->host_flags & IDE_HFLAG_POST_SET_MODE) {
404 if (ide_config_drive_speed(drive, mode))
406 hwif->set_dma_mode(drive, mode);
409 hwif->set_dma_mode(drive, mode);
410 return ide_config_drive_speed(drive, mode);
414 EXPORT_SYMBOL_GPL(ide_set_dma_mode);
417 * ide_set_xfer_rate - set transfer rate
418 * @drive: drive to set
419 * @rate: speed to attempt to set
421 * General helper for setting the speed of an IDE device. This
422 * function knows about user enforced limits from the configuration
423 * which ->set_pio_mode/->set_dma_mode does not.
426 int ide_set_xfer_rate(ide_drive_t *drive, u8 rate)
428 ide_hwif_t *hwif = drive->hwif;
430 if (hwif->set_dma_mode == NULL)
433 rate = ide_rate_filter(drive, rate);
435 if (rate >= XFER_PIO_0 && rate <= XFER_PIO_5)
436 return ide_set_pio_mode(drive, rate);
439 * TODO: transfer modes 0x00-0x07 passed from the user-space are
440 * currently handled here which needs fixing (please note that such
441 * case could happen iff the transfer mode has already been set on
442 * the device by ide-proc.c::set_xfer_rate()).
445 return ide_set_dma_mode(drive, rate);
448 static void ide_dump_opcode(ide_drive_t *drive)
454 spin_lock(&ide_lock);
457 rq = HWGROUP(drive)->rq;
458 spin_unlock(&ide_lock);
461 if (rq->cmd_type == REQ_TYPE_ATA_CMD ||
462 rq->cmd_type == REQ_TYPE_ATA_TASK) {
463 char *args = rq->buffer;
468 } else if (rq->cmd_type == REQ_TYPE_ATA_TASKFILE) {
469 ide_task_t *args = rq->special;
471 task_struct_t *tf = (task_struct_t *) args->tfRegister;
472 opcode = tf->command;
477 printk("ide: failed opcode was: ");
481 printk("0x%02x\n", opcode);
484 static u8 ide_dump_ata_status(ide_drive_t *drive, const char *msg, u8 stat)
486 ide_hwif_t *hwif = HWIF(drive);
490 local_irq_save(flags);
491 printk("%s: %s: status=0x%02x { ", drive->name, msg, stat);
492 if (stat & BUSY_STAT)
495 if (stat & READY_STAT) printk("DriveReady ");
496 if (stat & WRERR_STAT) printk("DeviceFault ");
497 if (stat & SEEK_STAT) printk("SeekComplete ");
498 if (stat & DRQ_STAT) printk("DataRequest ");
499 if (stat & ECC_STAT) printk("CorrectedError ");
500 if (stat & INDEX_STAT) printk("Index ");
501 if (stat & ERR_STAT) printk("Error ");
504 if ((stat & (BUSY_STAT|ERR_STAT)) == ERR_STAT) {
505 err = hwif->INB(IDE_ERROR_REG);
506 printk("%s: %s: error=0x%02x { ", drive->name, msg, err);
507 if (err & ABRT_ERR) printk("DriveStatusError ");
509 printk((err & ABRT_ERR) ? "BadCRC " : "BadSector ");
510 if (err & ECC_ERR) printk("UncorrectableError ");
511 if (err & ID_ERR) printk("SectorIdNotFound ");
512 if (err & TRK0_ERR) printk("TrackZeroNotFound ");
513 if (err & MARK_ERR) printk("AddrMarkNotFound ");
515 if ((err & (BBD_ERR | ABRT_ERR)) == BBD_ERR ||
516 (err & (ECC_ERR|ID_ERR|MARK_ERR))) {
517 if (drive->addressing == 1) {
519 u32 low = 0, high = 0;
520 hwif->OUTB(drive->ctl&~0x80, IDE_CONTROL_REG);
521 low = ide_read_24(drive);
522 hwif->OUTB(drive->ctl|0x80, IDE_CONTROL_REG);
523 high = ide_read_24(drive);
524 sectors = ((__u64)high << 24) | low;
525 printk(", LBAsect=%llu, high=%d, low=%d",
526 (unsigned long long) sectors,
529 u8 cur = hwif->INB(IDE_SELECT_REG);
530 if (cur & 0x40) { /* using LBA? */
531 printk(", LBAsect=%ld", (unsigned long)
533 |(hwif->INB(IDE_HCYL_REG)<<16)
534 |(hwif->INB(IDE_LCYL_REG)<<8)
535 | hwif->INB(IDE_SECTOR_REG));
537 printk(", CHS=%d/%d/%d",
538 (hwif->INB(IDE_HCYL_REG)<<8) +
539 hwif->INB(IDE_LCYL_REG),
541 hwif->INB(IDE_SECTOR_REG));
544 if (HWGROUP(drive) && HWGROUP(drive)->rq)
545 printk(", sector=%llu",
546 (unsigned long long)HWGROUP(drive)->rq->sector);
550 ide_dump_opcode(drive);
551 local_irq_restore(flags);
556 * ide_dump_atapi_status - print human readable atapi status
557 * @drive: drive that status applies to
558 * @msg: text message to print
559 * @stat: status byte to decode
561 * Error reporting, in human readable form (luxurious, but a memory hog).
564 static u8 ide_dump_atapi_status(ide_drive_t *drive, const char *msg, u8 stat)
568 atapi_status_t status;
573 local_irq_save(flags);
574 printk("%s: %s: status=0x%02x { ", drive->name, msg, stat);
578 if (status.b.drdy) printk("DriveReady ");
579 if (status.b.df) printk("DeviceFault ");
580 if (status.b.dsc) printk("SeekComplete ");
581 if (status.b.drq) printk("DataRequest ");
582 if (status.b.corr) printk("CorrectedError ");
583 if (status.b.idx) printk("Index ");
584 if (status.b.check) printk("Error ");
587 if (status.b.check && !status.b.bsy) {
588 error.all = HWIF(drive)->INB(IDE_ERROR_REG);
589 printk("%s: %s: error=0x%02x { ", drive->name, msg, error.all);
590 if (error.b.ili) printk("IllegalLengthIndication ");
591 if (error.b.eom) printk("EndOfMedia ");
592 if (error.b.abrt) printk("AbortedCommand ");
593 if (error.b.mcr) printk("MediaChangeRequested ");
594 if (error.b.sense_key) printk("LastFailedSense=0x%02x ",
598 ide_dump_opcode(drive);
599 local_irq_restore(flags);
604 * ide_dump_status - translate ATA/ATAPI error
605 * @drive: drive the error occured on
606 * @msg: information string
609 * Error reporting, in human readable form (luxurious, but a memory hog).
610 * Combines the drive name, message and status byte to provide a
611 * user understandable explanation of the device error.
614 u8 ide_dump_status(ide_drive_t *drive, const char *msg, u8 stat)
616 if (drive->media == ide_disk)
617 return ide_dump_ata_status(drive, msg, stat);
618 return ide_dump_atapi_status(drive, msg, stat);
621 EXPORT_SYMBOL(ide_dump_status);