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
35 * ide_xfer_verbose - return IDE mode names
36 * @xfer_rate: rate to name
38 * Returns a constant string giving the name of the mode
42 char *ide_xfer_verbose (u8 xfer_rate)
45 case XFER_UDMA_7: return("UDMA 7");
46 case XFER_UDMA_6: return("UDMA 6");
47 case XFER_UDMA_5: return("UDMA 5");
48 case XFER_UDMA_4: return("UDMA 4");
49 case XFER_UDMA_3: return("UDMA 3");
50 case XFER_UDMA_2: return("UDMA 2");
51 case XFER_UDMA_1: return("UDMA 1");
52 case XFER_UDMA_0: return("UDMA 0");
53 case XFER_MW_DMA_2: return("MW DMA 2");
54 case XFER_MW_DMA_1: return("MW DMA 1");
55 case XFER_MW_DMA_0: return("MW DMA 0");
56 case XFER_SW_DMA_2: return("SW DMA 2");
57 case XFER_SW_DMA_1: return("SW DMA 1");
58 case XFER_SW_DMA_0: return("SW DMA 0");
59 case XFER_PIO_4: return("PIO 4");
60 case XFER_PIO_3: return("PIO 3");
61 case XFER_PIO_2: return("PIO 2");
62 case XFER_PIO_1: return("PIO 1");
63 case XFER_PIO_0: return("PIO 0");
64 case XFER_PIO_SLOW: return("PIO SLOW");
65 default: return("XFER ERROR");
69 EXPORT_SYMBOL(ide_xfer_verbose);
72 * ide_rate_filter - filter transfer mode
74 * @speed: desired speed
76 * Given the available transfer modes this function returns
77 * the best available speed at or below the speed requested.
79 * FIXME: filter also PIO/SWDMA/MWDMA modes
82 u8 ide_rate_filter(ide_drive_t *drive, u8 speed)
84 #ifdef CONFIG_BLK_DEV_IDEDMA
85 ide_hwif_t *hwif = drive->hwif;
86 u8 mask = hwif->ultra_mask, mode = XFER_MW_DMA_2;
88 if (hwif->udma_filter)
89 mask = hwif->udma_filter(drive);
91 if ((mask & 0x78) && (eighty_ninty_three(drive) == 0))
95 mode = fls(mask) - 1 + XFER_UDMA_0;
97 // printk("%s: mode 0x%02x, speed 0x%02x\n", __FUNCTION__, mode, speed);
99 return min(speed, mode);
100 #else /* !CONFIG_BLK_DEV_IDEDMA */
101 return min(speed, (u8)XFER_PIO_4);
102 #endif /* CONFIG_BLK_DEV_IDEDMA */
105 EXPORT_SYMBOL(ide_rate_filter);
107 int ide_dma_enable (ide_drive_t *drive)
109 ide_hwif_t *hwif = HWIF(drive);
110 struct hd_driveid *id = drive->id;
112 return ((int) ((((id->dma_ultra >> 8) & hwif->ultra_mask) ||
113 ((id->dma_mword >> 8) & hwif->mwdma_mask) ||
114 ((id->dma_1word >> 8) & hwif->swdma_mask)) ? 1 : 0));
117 EXPORT_SYMBOL(ide_dma_enable);
119 int ide_use_fast_pio(ide_drive_t *drive)
121 struct hd_driveid *id = drive->id;
123 if ((id->capability & 1) && drive->autodma)
126 if ((id->capability & 8) || (id->field_valid & 2))
132 EXPORT_SYMBOL_GPL(ide_use_fast_pio);
135 * Standard (generic) timings for PIO modes, from ATA2 specification.
136 * These timings are for access to the IDE data port register *only*.
137 * Some drives may specify a mode, while also specifying a different
138 * value for cycle_time (from drive identification data).
140 const ide_pio_timings_t ide_pio_timings[6] = {
141 { 70, 165, 600 }, /* PIO Mode 0 */
142 { 50, 125, 383 }, /* PIO Mode 1 */
143 { 30, 100, 240 }, /* PIO Mode 2 */
144 { 30, 80, 180 }, /* PIO Mode 3 with IORDY */
145 { 25, 70, 120 }, /* PIO Mode 4 with IORDY */
146 { 20, 50, 100 } /* PIO Mode 5 with IORDY (nonstandard) */
149 EXPORT_SYMBOL_GPL(ide_pio_timings);
152 * Shared data/functions for determining best PIO mode for an IDE drive.
153 * Most of this stuff originally lived in cmd640.c, and changes to the
154 * ide_pio_blacklist[] table should be made with EXTREME CAUTION to avoid
155 * breaking the fragile cmd640.c support.
159 * Black list. Some drives incorrectly report their maximal PIO mode,
160 * at least in respect to CMD640. Here we keep info on some known drives.
162 static struct ide_pio_info {
165 } ide_pio_blacklist [] = {
166 /* { "Conner Peripherals 1275MB - CFS1275A", 4 }, */
167 { "Conner Peripherals 540MB - CFS540A", 3 },
175 { "WDC AC21200", 4 },
182 /* { "WDC AC21000", 4 }, */
183 { "WDC AC31000", 3 },
184 { "WDC AC31200", 3 },
185 /* { "WDC AC31600", 4 }, */
187 { "Maxtor 7131 AT", 1 },
188 { "Maxtor 7171 AT", 1 },
189 { "Maxtor 7213 AT", 1 },
190 { "Maxtor 7245 AT", 1 },
191 { "Maxtor 7345 AT", 1 },
192 { "Maxtor 7546 AT", 3 },
193 { "Maxtor 7540 AV", 3 },
195 { "SAMSUNG SHD-3121A", 1 },
196 { "SAMSUNG SHD-3122A", 1 },
197 { "SAMSUNG SHD-3172A", 1 },
199 /* { "ST51080A", 4 },
215 { "ST3491A", 1 }, /* reports 3, should be 1 or 2 (depending on */
216 /* drive) according to Seagates FIND-ATA program */
218 { "QUANTUM ELS127A", 0 },
219 { "QUANTUM ELS170A", 0 },
220 { "QUANTUM LPS240A", 0 },
221 { "QUANTUM LPS210A", 3 },
222 { "QUANTUM LPS270A", 3 },
223 { "QUANTUM LPS365A", 3 },
224 { "QUANTUM LPS540A", 3 },
225 { "QUANTUM LIGHTNING 540A", 3 },
226 { "QUANTUM LIGHTNING 730A", 3 },
228 { "QUANTUM FIREBALL_540", 3 }, /* Older Quantum Fireballs don't work */
229 { "QUANTUM FIREBALL_640", 3 },
230 { "QUANTUM FIREBALL_1080", 3 },
231 { "QUANTUM FIREBALL_1280", 3 },
236 * ide_scan_pio_blacklist - check for a blacklisted drive
237 * @model: Drive model string
239 * This routine searches the ide_pio_blacklist for an entry
240 * matching the start/whole of the supplied model name.
242 * Returns -1 if no match found.
243 * Otherwise returns the recommended PIO mode from ide_pio_blacklist[].
246 static int ide_scan_pio_blacklist (char *model)
248 struct ide_pio_info *p;
250 for (p = ide_pio_blacklist; p->name != NULL; p++) {
251 if (strncmp(p->name, model, strlen(p->name)) == 0)
258 * ide_get_best_pio_mode - get PIO mode from drive
259 * @drive: drive to consider
260 * @mode_wanted: preferred mode
261 * @max_mode: highest allowed mode
264 * This routine returns the recommended PIO settings for a given drive,
265 * based on the drive->id information and the ide_pio_blacklist[].
267 * Drive PIO mode is auto-selected if 255 is passed as mode_wanted.
268 * This is used by most chipset support modules when "auto-tuning".
271 u8 ide_get_best_pio_mode (ide_drive_t *drive, u8 mode_wanted, u8 max_mode, ide_pio_data_t *d)
276 struct hd_driveid* id = drive->id;
279 if (mode_wanted != 255) {
280 pio_mode = mode_wanted;
281 use_iordy = (pio_mode > 2);
282 } else if (!drive->id) {
284 } else if ((pio_mode = ide_scan_pio_blacklist(id->model)) != -1) {
286 use_iordy = (pio_mode > 2);
289 if (pio_mode > 2) { /* 2 is maximum allowed tPIO value */
293 if (id->field_valid & 2) { /* drive implements ATA2? */
294 if (id->capability & 8) { /* drive supports use_iordy? */
296 cycle_time = id->eide_pio_iordy;
297 if (id->eide_pio_modes & 7) {
299 if (id->eide_pio_modes & 4)
301 else if (id->eide_pio_modes & 2)
307 cycle_time = id->eide_pio;
312 * Conservative "downgrade" for all pre-ATA2 drives
314 if (pio_mode && pio_mode < 4) {
317 if (cycle_time && cycle_time < ide_pio_timings[pio_mode].cycle_time)
318 cycle_time = 0; /* use standard timing */
321 if (pio_mode > max_mode) {
326 d->pio_mode = pio_mode;
327 d->cycle_time = cycle_time ? cycle_time : ide_pio_timings[pio_mode].cycle_time;
328 d->use_iordy = use_iordy;
329 d->overridden = overridden;
334 EXPORT_SYMBOL_GPL(ide_get_best_pio_mode);
337 * ide_toggle_bounce - handle bounce buffering
338 * @drive: drive to update
339 * @on: on/off boolean
341 * Enable or disable bounce buffering for the device. Drives move
342 * between PIO and DMA and that changes the rules we need.
345 void ide_toggle_bounce(ide_drive_t *drive, int on)
347 u64 addr = BLK_BOUNCE_HIGH; /* dma64_addr_t */
349 if (!PCI_DMA_BUS_IS_PHYS) {
350 addr = BLK_BOUNCE_ANY;
351 } else if (on && drive->media == ide_disk) {
352 if (HWIF(drive)->pci_dev)
353 addr = HWIF(drive)->pci_dev->dma_mask;
357 blk_queue_bounce_limit(drive->queue, addr);
361 * ide_set_xfer_rate - set transfer rate
362 * @drive: drive to set
363 * @speed: speed to attempt to set
365 * General helper for setting the speed of an IDE device. This
366 * function knows about user enforced limits from the configuration
367 * which speedproc() does not. High level drivers should never
368 * invoke speedproc() directly.
371 int ide_set_xfer_rate(ide_drive_t *drive, u8 rate)
373 #ifndef CONFIG_BLK_DEV_IDEDMA
374 rate = min(rate, (u8) XFER_PIO_4);
376 if(HWIF(drive)->speedproc)
377 return HWIF(drive)->speedproc(drive, rate);
382 static void ide_dump_opcode(ide_drive_t *drive)
388 spin_lock(&ide_lock);
391 rq = HWGROUP(drive)->rq;
392 spin_unlock(&ide_lock);
395 if (rq->cmd_type == REQ_TYPE_ATA_CMD ||
396 rq->cmd_type == REQ_TYPE_ATA_TASK) {
397 char *args = rq->buffer;
402 } else if (rq->cmd_type == REQ_TYPE_ATA_TASKFILE) {
403 ide_task_t *args = rq->special;
405 task_struct_t *tf = (task_struct_t *) args->tfRegister;
406 opcode = tf->command;
411 printk("ide: failed opcode was: ");
415 printk("0x%02x\n", opcode);
418 static u8 ide_dump_ata_status(ide_drive_t *drive, const char *msg, u8 stat)
420 ide_hwif_t *hwif = HWIF(drive);
424 local_irq_save(flags);
425 printk("%s: %s: status=0x%02x { ", drive->name, msg, stat);
426 if (stat & BUSY_STAT)
429 if (stat & READY_STAT) printk("DriveReady ");
430 if (stat & WRERR_STAT) printk("DeviceFault ");
431 if (stat & SEEK_STAT) printk("SeekComplete ");
432 if (stat & DRQ_STAT) printk("DataRequest ");
433 if (stat & ECC_STAT) printk("CorrectedError ");
434 if (stat & INDEX_STAT) printk("Index ");
435 if (stat & ERR_STAT) printk("Error ");
438 if ((stat & (BUSY_STAT|ERR_STAT)) == ERR_STAT) {
439 err = hwif->INB(IDE_ERROR_REG);
440 printk("%s: %s: error=0x%02x { ", drive->name, msg, err);
441 if (err & ABRT_ERR) printk("DriveStatusError ");
443 printk((err & ABRT_ERR) ? "BadCRC " : "BadSector ");
444 if (err & ECC_ERR) printk("UncorrectableError ");
445 if (err & ID_ERR) printk("SectorIdNotFound ");
446 if (err & TRK0_ERR) printk("TrackZeroNotFound ");
447 if (err & MARK_ERR) printk("AddrMarkNotFound ");
449 if ((err & (BBD_ERR | ABRT_ERR)) == BBD_ERR ||
450 (err & (ECC_ERR|ID_ERR|MARK_ERR))) {
451 if (drive->addressing == 1) {
453 u32 low = 0, high = 0;
454 low = ide_read_24(drive);
455 hwif->OUTB(drive->ctl|0x80, IDE_CONTROL_REG);
456 high = ide_read_24(drive);
457 sectors = ((__u64)high << 24) | low;
458 printk(", LBAsect=%llu, high=%d, low=%d",
459 (unsigned long long) sectors,
462 u8 cur = hwif->INB(IDE_SELECT_REG);
463 if (cur & 0x40) { /* using LBA? */
464 printk(", LBAsect=%ld", (unsigned long)
466 |(hwif->INB(IDE_HCYL_REG)<<16)
467 |(hwif->INB(IDE_LCYL_REG)<<8)
468 | hwif->INB(IDE_SECTOR_REG));
470 printk(", CHS=%d/%d/%d",
471 (hwif->INB(IDE_HCYL_REG)<<8) +
472 hwif->INB(IDE_LCYL_REG),
474 hwif->INB(IDE_SECTOR_REG));
477 if (HWGROUP(drive) && HWGROUP(drive)->rq)
478 printk(", sector=%llu",
479 (unsigned long long)HWGROUP(drive)->rq->sector);
483 ide_dump_opcode(drive);
484 local_irq_restore(flags);
489 * ide_dump_atapi_status - print human readable atapi status
490 * @drive: drive that status applies to
491 * @msg: text message to print
492 * @stat: status byte to decode
494 * Error reporting, in human readable form (luxurious, but a memory hog).
497 static u8 ide_dump_atapi_status(ide_drive_t *drive, const char *msg, u8 stat)
501 atapi_status_t status;
506 local_irq_save(flags);
507 printk("%s: %s: status=0x%02x { ", drive->name, msg, stat);
511 if (status.b.drdy) printk("DriveReady ");
512 if (status.b.df) printk("DeviceFault ");
513 if (status.b.dsc) printk("SeekComplete ");
514 if (status.b.drq) printk("DataRequest ");
515 if (status.b.corr) printk("CorrectedError ");
516 if (status.b.idx) printk("Index ");
517 if (status.b.check) printk("Error ");
520 if (status.b.check && !status.b.bsy) {
521 error.all = HWIF(drive)->INB(IDE_ERROR_REG);
522 printk("%s: %s: error=0x%02x { ", drive->name, msg, error.all);
523 if (error.b.ili) printk("IllegalLengthIndication ");
524 if (error.b.eom) printk("EndOfMedia ");
525 if (error.b.abrt) printk("AbortedCommand ");
526 if (error.b.mcr) printk("MediaChangeRequested ");
527 if (error.b.sense_key) printk("LastFailedSense=0x%02x ",
531 ide_dump_opcode(drive);
532 local_irq_restore(flags);
537 * ide_dump_status - translate ATA/ATAPI error
538 * @drive: drive the error occured on
539 * @msg: information string
542 * Error reporting, in human readable form (luxurious, but a memory hog).
543 * Combines the drive name, message and status byte to provide a
544 * user understandable explanation of the device error.
547 u8 ide_dump_status(ide_drive_t *drive, const char *msg, u8 stat)
549 if (drive->media == ide_disk)
550 return ide_dump_ata_status(drive, msg, stat);
551 return ide_dump_atapi_status(drive, msg, stat);
554 EXPORT_SYMBOL(ide_dump_status);