1 #include <linux/config.h>
2 #include <linux/module.h>
3 #include <linux/types.h>
4 #include <linux/string.h>
5 #include <linux/kernel.h>
6 #include <linux/timer.h>
8 #include <linux/interrupt.h>
9 #include <linux/major.h>
10 #include <linux/errno.h>
11 #include <linux/genhd.h>
12 #include <linux/blkpg.h>
13 #include <linux/slab.h>
14 #include <linux/pci.h>
15 #include <linux/delay.h>
16 #include <linux/hdreg.h>
17 #include <linux/ide.h>
18 #include <linux/bitops.h>
20 #include <asm/byteorder.h>
22 #include <asm/uaccess.h>
26 * IDE library routines. These are plug in code that most
27 * drivers can use but occasionally may be weird enough
28 * to want to do their own thing with
30 * Add common non I/O op stuff here. Make sure it has proper
31 * kernel-doc function headers or your patch will be rejected
36 * ide_xfer_verbose - return IDE mode names
37 * @xfer_rate: rate to name
39 * Returns a constant string giving the name of the mode
43 char *ide_xfer_verbose (u8 xfer_rate)
46 case XFER_UDMA_7: return("UDMA 7");
47 case XFER_UDMA_6: return("UDMA 6");
48 case XFER_UDMA_5: return("UDMA 5");
49 case XFER_UDMA_4: return("UDMA 4");
50 case XFER_UDMA_3: return("UDMA 3");
51 case XFER_UDMA_2: return("UDMA 2");
52 case XFER_UDMA_1: return("UDMA 1");
53 case XFER_UDMA_0: return("UDMA 0");
54 case XFER_MW_DMA_2: return("MW DMA 2");
55 case XFER_MW_DMA_1: return("MW DMA 1");
56 case XFER_MW_DMA_0: return("MW DMA 0");
57 case XFER_SW_DMA_2: return("SW DMA 2");
58 case XFER_SW_DMA_1: return("SW DMA 1");
59 case XFER_SW_DMA_0: return("SW DMA 0");
60 case XFER_PIO_4: return("PIO 4");
61 case XFER_PIO_3: return("PIO 3");
62 case XFER_PIO_2: return("PIO 2");
63 case XFER_PIO_1: return("PIO 1");
64 case XFER_PIO_0: return("PIO 0");
65 case XFER_PIO_SLOW: return("PIO SLOW");
66 default: return("XFER ERROR");
70 EXPORT_SYMBOL(ide_xfer_verbose);
73 * ide_dma_speed - compute DMA speed
75 * @mode; intended mode
77 * Checks the drive capabilities and returns the speed to use
78 * for the transfer. Returns -1 if the requested mode is unknown
82 u8 ide_dma_speed(ide_drive_t *drive, u8 mode)
84 struct hd_driveid *id = drive->id;
85 ide_hwif_t *hwif = HWIF(drive);
88 if (drive->media != ide_disk && hwif->atapi_dma == 0)
93 if ((id->dma_ultra & 0x0040) &&
94 (id->dma_ultra & hwif->ultra_mask))
95 { speed = XFER_UDMA_6; break; }
97 if ((id->dma_ultra & 0x0020) &&
98 (id->dma_ultra & hwif->ultra_mask))
99 { speed = XFER_UDMA_5; break; }
101 if ((id->dma_ultra & 0x0010) &&
102 (id->dma_ultra & hwif->ultra_mask))
103 { speed = XFER_UDMA_4; break; }
104 if ((id->dma_ultra & 0x0008) &&
105 (id->dma_ultra & hwif->ultra_mask))
106 { speed = XFER_UDMA_3; break; }
108 if ((id->dma_ultra & 0x0004) &&
109 (id->dma_ultra & hwif->ultra_mask))
110 { speed = XFER_UDMA_2; break; }
111 if ((id->dma_ultra & 0x0002) &&
112 (id->dma_ultra & hwif->ultra_mask))
113 { speed = XFER_UDMA_1; break; }
114 if ((id->dma_ultra & 0x0001) &&
115 (id->dma_ultra & hwif->ultra_mask))
116 { speed = XFER_UDMA_0; break; }
118 if ((id->dma_mword & 0x0004) &&
119 (id->dma_mword & hwif->mwdma_mask))
120 { speed = XFER_MW_DMA_2; break; }
121 if ((id->dma_mword & 0x0002) &&
122 (id->dma_mword & hwif->mwdma_mask))
123 { speed = XFER_MW_DMA_1; break; }
124 if ((id->dma_mword & 0x0001) &&
125 (id->dma_mword & hwif->mwdma_mask))
126 { speed = XFER_MW_DMA_0; break; }
127 if ((id->dma_1word & 0x0004) &&
128 (id->dma_1word & hwif->swdma_mask))
129 { speed = XFER_SW_DMA_2; break; }
130 if ((id->dma_1word & 0x0002) &&
131 (id->dma_1word & hwif->swdma_mask))
132 { speed = XFER_SW_DMA_1; break; }
133 if ((id->dma_1word & 0x0001) &&
134 (id->dma_1word & hwif->swdma_mask))
135 { speed = XFER_SW_DMA_0; break; }
138 // printk("%s: %s: mode 0x%02x, speed 0x%02x\n",
139 // __FUNCTION__, drive->name, mode, speed);
144 EXPORT_SYMBOL(ide_dma_speed);
148 * ide_rate_filter - return best speed for mode
149 * @mode: modes available
150 * @speed: desired speed
152 * Given the available DMA/UDMA mode this function returns
153 * the best available speed at or below the speed requested.
156 u8 ide_rate_filter (u8 mode, u8 speed)
158 #ifdef CONFIG_BLK_DEV_IDEDMA
159 static u8 speed_max[] = {
160 XFER_MW_DMA_2, XFER_UDMA_2, XFER_UDMA_4,
161 XFER_UDMA_5, XFER_UDMA_6
164 // printk("%s: mode 0x%02x, speed 0x%02x\n", __FUNCTION__, mode, speed);
166 /* So that we remember to update this if new modes appear */
168 return min(speed, speed_max[mode]);
169 #else /* !CONFIG_BLK_DEV_IDEDMA */
170 return min(speed, (u8)XFER_PIO_4);
171 #endif /* CONFIG_BLK_DEV_IDEDMA */
174 EXPORT_SYMBOL(ide_rate_filter);
176 int ide_dma_enable (ide_drive_t *drive)
178 ide_hwif_t *hwif = HWIF(drive);
179 struct hd_driveid *id = drive->id;
181 return ((int) ((((id->dma_ultra >> 8) & hwif->ultra_mask) ||
182 ((id->dma_mword >> 8) & hwif->mwdma_mask) ||
183 ((id->dma_1word >> 8) & hwif->swdma_mask)) ? 1 : 0));
186 EXPORT_SYMBOL(ide_dma_enable);
189 * Standard (generic) timings for PIO modes, from ATA2 specification.
190 * These timings are for access to the IDE data port register *only*.
191 * Some drives may specify a mode, while also specifying a different
192 * value for cycle_time (from drive identification data).
194 const ide_pio_timings_t ide_pio_timings[6] = {
195 { 70, 165, 600 }, /* PIO Mode 0 */
196 { 50, 125, 383 }, /* PIO Mode 1 */
197 { 30, 100, 240 }, /* PIO Mode 2 */
198 { 30, 80, 180 }, /* PIO Mode 3 with IORDY */
199 { 25, 70, 120 }, /* PIO Mode 4 with IORDY */
200 { 20, 50, 100 } /* PIO Mode 5 with IORDY (nonstandard) */
203 EXPORT_SYMBOL_GPL(ide_pio_timings);
206 * Shared data/functions for determining best PIO mode for an IDE drive.
207 * Most of this stuff originally lived in cmd640.c, and changes to the
208 * ide_pio_blacklist[] table should be made with EXTREME CAUTION to avoid
209 * breaking the fragile cmd640.c support.
213 * Black list. Some drives incorrectly report their maximal PIO mode,
214 * at least in respect to CMD640. Here we keep info on some known drives.
216 static struct ide_pio_info {
219 } ide_pio_blacklist [] = {
220 /* { "Conner Peripherals 1275MB - CFS1275A", 4 }, */
221 { "Conner Peripherals 540MB - CFS540A", 3 },
229 { "WDC AC21200", 4 },
236 /* { "WDC AC21000", 4 }, */
237 { "WDC AC31000", 3 },
238 { "WDC AC31200", 3 },
239 /* { "WDC AC31600", 4 }, */
241 { "Maxtor 7131 AT", 1 },
242 { "Maxtor 7171 AT", 1 },
243 { "Maxtor 7213 AT", 1 },
244 { "Maxtor 7245 AT", 1 },
245 { "Maxtor 7345 AT", 1 },
246 { "Maxtor 7546 AT", 3 },
247 { "Maxtor 7540 AV", 3 },
249 { "SAMSUNG SHD-3121A", 1 },
250 { "SAMSUNG SHD-3122A", 1 },
251 { "SAMSUNG SHD-3172A", 1 },
253 /* { "ST51080A", 4 },
269 { "ST3491A", 1 }, /* reports 3, should be 1 or 2 (depending on */
270 /* drive) according to Seagates FIND-ATA program */
272 { "QUANTUM ELS127A", 0 },
273 { "QUANTUM ELS170A", 0 },
274 { "QUANTUM LPS240A", 0 },
275 { "QUANTUM LPS210A", 3 },
276 { "QUANTUM LPS270A", 3 },
277 { "QUANTUM LPS365A", 3 },
278 { "QUANTUM LPS540A", 3 },
279 { "QUANTUM LIGHTNING 540A", 3 },
280 { "QUANTUM LIGHTNING 730A", 3 },
282 { "QUANTUM FIREBALL_540", 3 }, /* Older Quantum Fireballs don't work */
283 { "QUANTUM FIREBALL_640", 3 },
284 { "QUANTUM FIREBALL_1080", 3 },
285 { "QUANTUM FIREBALL_1280", 3 },
290 * ide_scan_pio_blacklist - check for a blacklisted drive
291 * @model: Drive model string
293 * This routine searches the ide_pio_blacklist for an entry
294 * matching the start/whole of the supplied model name.
296 * Returns -1 if no match found.
297 * Otherwise returns the recommended PIO mode from ide_pio_blacklist[].
300 static int ide_scan_pio_blacklist (char *model)
302 struct ide_pio_info *p;
304 for (p = ide_pio_blacklist; p->name != NULL; p++) {
305 if (strncmp(p->name, model, strlen(p->name)) == 0)
312 * ide_get_best_pio_mode - get PIO mode from drive
313 * @driver: drive to consider
314 * @mode_wanted: preferred mode
315 * @max_mode: highest allowed
318 * This routine returns the recommended PIO settings for a given drive,
319 * based on the drive->id information and the ide_pio_blacklist[].
320 * This is used by most chipset support modules when "auto-tuning".
322 * Drive PIO mode auto selection
325 u8 ide_get_best_pio_mode (ide_drive_t *drive, u8 mode_wanted, u8 max_mode, ide_pio_data_t *d)
330 struct hd_driveid* id = drive->id;
334 if (mode_wanted != 255) {
335 pio_mode = mode_wanted;
336 } else if (!drive->id) {
338 } else if ((pio_mode = ide_scan_pio_blacklist(id->model)) != -1) {
341 use_iordy = (pio_mode > 2);
344 if (pio_mode > 2) { /* 2 is maximum allowed tPIO value */
348 if (id->field_valid & 2) { /* drive implements ATA2? */
349 if (id->capability & 8) { /* drive supports use_iordy? */
351 cycle_time = id->eide_pio_iordy;
352 if (id->eide_pio_modes & 7) {
354 if (id->eide_pio_modes & 4)
356 else if (id->eide_pio_modes & 2)
362 cycle_time = id->eide_pio;
367 if (drive->id->major_rev_num & 0x0004) printk("ATA-2 ");
371 * Conservative "downgrade" for all pre-ATA2 drives
373 if (pio_mode && pio_mode < 4) {
377 use_iordy = (pio_mode > 2);
379 if (cycle_time && cycle_time < ide_pio_timings[pio_mode].cycle_time)
380 cycle_time = 0; /* use standard timing */
383 if (pio_mode > max_mode) {
388 d->pio_mode = pio_mode;
389 d->cycle_time = cycle_time ? cycle_time : ide_pio_timings[pio_mode].cycle_time;
390 d->use_iordy = use_iordy;
391 d->overridden = overridden;
392 d->blacklisted = blacklisted;
397 EXPORT_SYMBOL_GPL(ide_get_best_pio_mode);
400 * ide_toggle_bounce - handle bounce buffering
401 * @drive: drive to update
402 * @on: on/off boolean
404 * Enable or disable bounce buffering for the device. Drives move
405 * between PIO and DMA and that changes the rules we need.
408 void ide_toggle_bounce(ide_drive_t *drive, int on)
410 u64 addr = BLK_BOUNCE_HIGH; /* dma64_addr_t */
412 if (!PCI_DMA_BUS_IS_PHYS) {
413 addr = BLK_BOUNCE_ANY;
414 } else if (on && drive->media == ide_disk) {
415 if (HWIF(drive)->pci_dev)
416 addr = HWIF(drive)->pci_dev->dma_mask;
420 blk_queue_bounce_limit(drive->queue, addr);
424 * ide_set_xfer_rate - set transfer rate
425 * @drive: drive to set
426 * @speed: speed to attempt to set
428 * General helper for setting the speed of an IDE device. This
429 * function knows about user enforced limits from the configuration
430 * which speedproc() does not. High level drivers should never
431 * invoke speedproc() directly.
434 int ide_set_xfer_rate(ide_drive_t *drive, u8 rate)
436 #ifndef CONFIG_BLK_DEV_IDEDMA
437 rate = min(rate, (u8) XFER_PIO_4);
439 if(HWIF(drive)->speedproc)
440 return HWIF(drive)->speedproc(drive, rate);
445 EXPORT_SYMBOL_GPL(ide_set_xfer_rate);
447 static void ide_dump_opcode(ide_drive_t *drive)
453 spin_lock(&ide_lock);
456 rq = HWGROUP(drive)->rq;
457 spin_unlock(&ide_lock);
460 if (rq->flags & (REQ_DRIVE_CMD | REQ_DRIVE_TASK)) {
461 char *args = rq->buffer;
466 } else if (rq->flags & REQ_DRIVE_TASKFILE) {
467 ide_task_t *args = rq->special;
469 task_struct_t *tf = (task_struct_t *) args->tfRegister;
470 opcode = tf->command;
475 printk("ide: failed opcode was: ");
479 printk("0x%02x\n", opcode);
482 static u8 ide_dump_ata_status(ide_drive_t *drive, const char *msg, u8 stat)
484 ide_hwif_t *hwif = HWIF(drive);
488 local_irq_set(flags);
489 printk("%s: %s: status=0x%02x { ", drive->name, msg, stat);
490 if (stat & BUSY_STAT)
493 if (stat & READY_STAT) printk("DriveReady ");
494 if (stat & WRERR_STAT) printk("DeviceFault ");
495 if (stat & SEEK_STAT) printk("SeekComplete ");
496 if (stat & DRQ_STAT) printk("DataRequest ");
497 if (stat & ECC_STAT) printk("CorrectedError ");
498 if (stat & INDEX_STAT) printk("Index ");
499 if (stat & ERR_STAT) printk("Error ");
502 if ((stat & (BUSY_STAT|ERR_STAT)) == ERR_STAT) {
503 err = hwif->INB(IDE_ERROR_REG);
504 printk("%s: %s: error=0x%02x { ", drive->name, msg, err);
505 if (err & ABRT_ERR) printk("DriveStatusError ");
507 printk((err & ABRT_ERR) ? "BadCRC " : "BadSector ");
508 if (err & ECC_ERR) printk("UncorrectableError ");
509 if (err & ID_ERR) printk("SectorIdNotFound ");
510 if (err & TRK0_ERR) printk("TrackZeroNotFound ");
511 if (err & MARK_ERR) printk("AddrMarkNotFound ");
513 if ((err & (BBD_ERR | ABRT_ERR)) == BBD_ERR ||
514 (err & (ECC_ERR|ID_ERR|MARK_ERR))) {
515 if (drive->addressing == 1) {
517 u32 low = 0, high = 0;
518 low = ide_read_24(drive);
519 hwif->OUTB(drive->ctl|0x80, IDE_CONTROL_REG);
520 high = ide_read_24(drive);
521 sectors = ((__u64)high << 24) | low;
522 printk(", LBAsect=%llu, high=%d, low=%d",
523 (unsigned long long) sectors,
526 u8 cur = hwif->INB(IDE_SELECT_REG);
527 if (cur & 0x40) { /* using LBA? */
528 printk(", LBAsect=%ld", (unsigned long)
530 |(hwif->INB(IDE_HCYL_REG)<<16)
531 |(hwif->INB(IDE_LCYL_REG)<<8)
532 | hwif->INB(IDE_SECTOR_REG));
534 printk(", CHS=%d/%d/%d",
535 (hwif->INB(IDE_HCYL_REG)<<8) +
536 hwif->INB(IDE_LCYL_REG),
538 hwif->INB(IDE_SECTOR_REG));
541 if (HWGROUP(drive) && HWGROUP(drive)->rq)
542 printk(", sector=%llu",
543 (unsigned long long)HWGROUP(drive)->rq->sector);
547 ide_dump_opcode(drive);
548 local_irq_restore(flags);
553 * ide_dump_atapi_status - print human readable atapi status
554 * @drive: drive that status applies to
555 * @msg: text message to print
556 * @stat: status byte to decode
558 * Error reporting, in human readable form (luxurious, but a memory hog).
561 static u8 ide_dump_atapi_status(ide_drive_t *drive, const char *msg, u8 stat)
565 atapi_status_t status;
570 local_irq_set(flags);
571 printk("%s: %s: status=0x%02x { ", drive->name, msg, stat);
575 if (status.b.drdy) printk("DriveReady ");
576 if (status.b.df) printk("DeviceFault ");
577 if (status.b.dsc) printk("SeekComplete ");
578 if (status.b.drq) printk("DataRequest ");
579 if (status.b.corr) printk("CorrectedError ");
580 if (status.b.idx) printk("Index ");
581 if (status.b.check) printk("Error ");
584 if (status.b.check && !status.b.bsy) {
585 error.all = HWIF(drive)->INB(IDE_ERROR_REG);
586 printk("%s: %s: error=0x%02x { ", drive->name, msg, error.all);
587 if (error.b.ili) printk("IllegalLengthIndication ");
588 if (error.b.eom) printk("EndOfMedia ");
589 if (error.b.abrt) printk("AbortedCommand ");
590 if (error.b.mcr) printk("MediaChangeRequested ");
591 if (error.b.sense_key) printk("LastFailedSense=0x%02x ",
595 ide_dump_opcode(drive);
596 local_irq_restore(flags);
601 * ide_dump_status - translate ATA/ATAPI error
602 * @drive: drive the error occured on
603 * @msg: information string
606 * Error reporting, in human readable form (luxurious, but a memory hog).
607 * Combines the drive name, message and status byte to provide a
608 * user understandable explanation of the device error.
611 u8 ide_dump_status(ide_drive_t *drive, const char *msg, u8 stat)
613 if (drive->media == ide_disk)
614 return ide_dump_ata_status(drive, msg, stat);
615 return ide_dump_atapi_status(drive, msg, stat);
618 EXPORT_SYMBOL(ide_dump_status);