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_dma_speed - compute DMA speed
74 * @mode: modes available
76 * Checks the drive capabilities and returns the speed to use
77 * for the DMA transfer. Returns 0 if the drive is incapable
81 u8 ide_dma_speed(ide_drive_t *drive, u8 mode)
83 struct hd_driveid *id = drive->id;
84 ide_hwif_t *hwif = HWIF(drive);
85 u8 ultra_mask, mwdma_mask, swdma_mask;
88 if (drive->media != ide_disk && hwif->atapi_dma == 0)
91 /* Capable of UltraDMA modes? */
92 ultra_mask = id->dma_ultra & hwif->ultra_mask;
94 if (!(id->field_valid & 4))
95 mode = 0; /* fallback to MW/SW DMA if no UltraDMA */
99 if (ultra_mask & 0x40) {
104 if (ultra_mask & 0x20) {
109 if (ultra_mask & 0x10) {
113 if (ultra_mask & 0x08) {
118 if (ultra_mask & 0x04) {
122 if (ultra_mask & 0x02) {
126 if (ultra_mask & 0x01) {
131 mwdma_mask = id->dma_mword & hwif->mwdma_mask;
133 if (mwdma_mask & 0x04) {
134 speed = XFER_MW_DMA_2;
137 if (mwdma_mask & 0x02) {
138 speed = XFER_MW_DMA_1;
141 if (mwdma_mask & 0x01) {
142 speed = XFER_MW_DMA_0;
146 swdma_mask = id->dma_1word & hwif->swdma_mask;
148 if (swdma_mask & 0x04) {
149 speed = XFER_SW_DMA_2;
152 if (swdma_mask & 0x02) {
153 speed = XFER_SW_DMA_1;
156 if (swdma_mask & 0x01) {
157 speed = XFER_SW_DMA_0;
164 EXPORT_SYMBOL(ide_dma_speed);
168 * ide_rate_filter - return best speed for mode
169 * @mode: modes available
170 * @speed: desired speed
172 * Given the available DMA/UDMA mode this function returns
173 * the best available speed at or below the speed requested.
176 u8 ide_rate_filter (u8 mode, u8 speed)
178 #ifdef CONFIG_BLK_DEV_IDEDMA
179 static u8 speed_max[] = {
180 XFER_MW_DMA_2, XFER_UDMA_2, XFER_UDMA_4,
181 XFER_UDMA_5, XFER_UDMA_6
184 // printk("%s: mode 0x%02x, speed 0x%02x\n", __FUNCTION__, mode, speed);
186 /* So that we remember to update this if new modes appear */
188 return min(speed, speed_max[mode]);
189 #else /* !CONFIG_BLK_DEV_IDEDMA */
190 return min(speed, (u8)XFER_PIO_4);
191 #endif /* CONFIG_BLK_DEV_IDEDMA */
194 EXPORT_SYMBOL(ide_rate_filter);
196 int ide_dma_enable (ide_drive_t *drive)
198 ide_hwif_t *hwif = HWIF(drive);
199 struct hd_driveid *id = drive->id;
201 return ((int) ((((id->dma_ultra >> 8) & hwif->ultra_mask) ||
202 ((id->dma_mword >> 8) & hwif->mwdma_mask) ||
203 ((id->dma_1word >> 8) & hwif->swdma_mask)) ? 1 : 0));
206 EXPORT_SYMBOL(ide_dma_enable);
208 int ide_use_fast_pio(ide_drive_t *drive)
210 struct hd_driveid *id = drive->id;
212 if ((id->capability & 1) && drive->autodma)
215 if ((id->capability & 8) || (id->field_valid & 2))
221 EXPORT_SYMBOL_GPL(ide_use_fast_pio);
224 * Standard (generic) timings for PIO modes, from ATA2 specification.
225 * These timings are for access to the IDE data port register *only*.
226 * Some drives may specify a mode, while also specifying a different
227 * value for cycle_time (from drive identification data).
229 const ide_pio_timings_t ide_pio_timings[6] = {
230 { 70, 165, 600 }, /* PIO Mode 0 */
231 { 50, 125, 383 }, /* PIO Mode 1 */
232 { 30, 100, 240 }, /* PIO Mode 2 */
233 { 30, 80, 180 }, /* PIO Mode 3 with IORDY */
234 { 25, 70, 120 }, /* PIO Mode 4 with IORDY */
235 { 20, 50, 100 } /* PIO Mode 5 with IORDY (nonstandard) */
238 EXPORT_SYMBOL_GPL(ide_pio_timings);
241 * Shared data/functions for determining best PIO mode for an IDE drive.
242 * Most of this stuff originally lived in cmd640.c, and changes to the
243 * ide_pio_blacklist[] table should be made with EXTREME CAUTION to avoid
244 * breaking the fragile cmd640.c support.
248 * Black list. Some drives incorrectly report their maximal PIO mode,
249 * at least in respect to CMD640. Here we keep info on some known drives.
251 static struct ide_pio_info {
254 } ide_pio_blacklist [] = {
255 /* { "Conner Peripherals 1275MB - CFS1275A", 4 }, */
256 { "Conner Peripherals 540MB - CFS540A", 3 },
264 { "WDC AC21200", 4 },
271 /* { "WDC AC21000", 4 }, */
272 { "WDC AC31000", 3 },
273 { "WDC AC31200", 3 },
274 /* { "WDC AC31600", 4 }, */
276 { "Maxtor 7131 AT", 1 },
277 { "Maxtor 7171 AT", 1 },
278 { "Maxtor 7213 AT", 1 },
279 { "Maxtor 7245 AT", 1 },
280 { "Maxtor 7345 AT", 1 },
281 { "Maxtor 7546 AT", 3 },
282 { "Maxtor 7540 AV", 3 },
284 { "SAMSUNG SHD-3121A", 1 },
285 { "SAMSUNG SHD-3122A", 1 },
286 { "SAMSUNG SHD-3172A", 1 },
288 /* { "ST51080A", 4 },
304 { "ST3491A", 1 }, /* reports 3, should be 1 or 2 (depending on */
305 /* drive) according to Seagates FIND-ATA program */
307 { "QUANTUM ELS127A", 0 },
308 { "QUANTUM ELS170A", 0 },
309 { "QUANTUM LPS240A", 0 },
310 { "QUANTUM LPS210A", 3 },
311 { "QUANTUM LPS270A", 3 },
312 { "QUANTUM LPS365A", 3 },
313 { "QUANTUM LPS540A", 3 },
314 { "QUANTUM LIGHTNING 540A", 3 },
315 { "QUANTUM LIGHTNING 730A", 3 },
317 { "QUANTUM FIREBALL_540", 3 }, /* Older Quantum Fireballs don't work */
318 { "QUANTUM FIREBALL_640", 3 },
319 { "QUANTUM FIREBALL_1080", 3 },
320 { "QUANTUM FIREBALL_1280", 3 },
325 * ide_scan_pio_blacklist - check for a blacklisted drive
326 * @model: Drive model string
328 * This routine searches the ide_pio_blacklist for an entry
329 * matching the start/whole of the supplied model name.
331 * Returns -1 if no match found.
332 * Otherwise returns the recommended PIO mode from ide_pio_blacklist[].
335 static int ide_scan_pio_blacklist (char *model)
337 struct ide_pio_info *p;
339 for (p = ide_pio_blacklist; p->name != NULL; p++) {
340 if (strncmp(p->name, model, strlen(p->name)) == 0)
347 * ide_get_best_pio_mode - get PIO mode from drive
348 * @driver: drive to consider
349 * @mode_wanted: preferred mode
350 * @max_mode: highest allowed
353 * This routine returns the recommended PIO settings for a given drive,
354 * based on the drive->id information and the ide_pio_blacklist[].
355 * This is used by most chipset support modules when "auto-tuning".
357 * Drive PIO mode auto selection
360 u8 ide_get_best_pio_mode (ide_drive_t *drive, u8 mode_wanted, u8 max_mode, ide_pio_data_t *d)
365 struct hd_driveid* id = drive->id;
368 if (mode_wanted != 255) {
369 pio_mode = mode_wanted;
370 } else if (!drive->id) {
372 } else if ((pio_mode = ide_scan_pio_blacklist(id->model)) != -1) {
374 use_iordy = (pio_mode > 2);
377 if (pio_mode > 2) { /* 2 is maximum allowed tPIO value */
381 if (id->field_valid & 2) { /* drive implements ATA2? */
382 if (id->capability & 8) { /* drive supports use_iordy? */
384 cycle_time = id->eide_pio_iordy;
385 if (id->eide_pio_modes & 7) {
387 if (id->eide_pio_modes & 4)
389 else if (id->eide_pio_modes & 2)
395 cycle_time = id->eide_pio;
400 if (drive->id->major_rev_num & 0x0004) printk("ATA-2 ");
404 * Conservative "downgrade" for all pre-ATA2 drives
406 if (pio_mode && pio_mode < 4) {
410 use_iordy = (pio_mode > 2);
412 if (cycle_time && cycle_time < ide_pio_timings[pio_mode].cycle_time)
413 cycle_time = 0; /* use standard timing */
416 if (pio_mode > max_mode) {
421 d->pio_mode = pio_mode;
422 d->cycle_time = cycle_time ? cycle_time : ide_pio_timings[pio_mode].cycle_time;
423 d->use_iordy = use_iordy;
424 d->overridden = overridden;
429 EXPORT_SYMBOL_GPL(ide_get_best_pio_mode);
432 * ide_toggle_bounce - handle bounce buffering
433 * @drive: drive to update
434 * @on: on/off boolean
436 * Enable or disable bounce buffering for the device. Drives move
437 * between PIO and DMA and that changes the rules we need.
440 void ide_toggle_bounce(ide_drive_t *drive, int on)
442 u64 addr = BLK_BOUNCE_HIGH; /* dma64_addr_t */
444 if (!PCI_DMA_BUS_IS_PHYS) {
445 addr = BLK_BOUNCE_ANY;
446 } else if (on && drive->media == ide_disk) {
447 if (HWIF(drive)->pci_dev)
448 addr = HWIF(drive)->pci_dev->dma_mask;
452 blk_queue_bounce_limit(drive->queue, addr);
456 * ide_set_xfer_rate - set transfer rate
457 * @drive: drive to set
458 * @speed: speed to attempt to set
460 * General helper for setting the speed of an IDE device. This
461 * function knows about user enforced limits from the configuration
462 * which speedproc() does not. High level drivers should never
463 * invoke speedproc() directly.
466 int ide_set_xfer_rate(ide_drive_t *drive, u8 rate)
468 #ifndef CONFIG_BLK_DEV_IDEDMA
469 rate = min(rate, (u8) XFER_PIO_4);
471 if(HWIF(drive)->speedproc)
472 return HWIF(drive)->speedproc(drive, rate);
477 static void ide_dump_opcode(ide_drive_t *drive)
483 spin_lock(&ide_lock);
486 rq = HWGROUP(drive)->rq;
487 spin_unlock(&ide_lock);
490 if (rq->cmd_type == REQ_TYPE_ATA_CMD ||
491 rq->cmd_type == REQ_TYPE_ATA_TASK) {
492 char *args = rq->buffer;
497 } else if (rq->cmd_type == REQ_TYPE_ATA_TASKFILE) {
498 ide_task_t *args = rq->special;
500 task_struct_t *tf = (task_struct_t *) args->tfRegister;
501 opcode = tf->command;
506 printk("ide: failed opcode was: ");
510 printk("0x%02x\n", opcode);
513 static u8 ide_dump_ata_status(ide_drive_t *drive, const char *msg, u8 stat)
515 ide_hwif_t *hwif = HWIF(drive);
519 local_irq_save(flags);
520 printk("%s: %s: status=0x%02x { ", drive->name, msg, stat);
521 if (stat & BUSY_STAT)
524 if (stat & READY_STAT) printk("DriveReady ");
525 if (stat & WRERR_STAT) printk("DeviceFault ");
526 if (stat & SEEK_STAT) printk("SeekComplete ");
527 if (stat & DRQ_STAT) printk("DataRequest ");
528 if (stat & ECC_STAT) printk("CorrectedError ");
529 if (stat & INDEX_STAT) printk("Index ");
530 if (stat & ERR_STAT) printk("Error ");
533 if ((stat & (BUSY_STAT|ERR_STAT)) == ERR_STAT) {
534 err = hwif->INB(IDE_ERROR_REG);
535 printk("%s: %s: error=0x%02x { ", drive->name, msg, err);
536 if (err & ABRT_ERR) printk("DriveStatusError ");
538 printk((err & ABRT_ERR) ? "BadCRC " : "BadSector ");
539 if (err & ECC_ERR) printk("UncorrectableError ");
540 if (err & ID_ERR) printk("SectorIdNotFound ");
541 if (err & TRK0_ERR) printk("TrackZeroNotFound ");
542 if (err & MARK_ERR) printk("AddrMarkNotFound ");
544 if ((err & (BBD_ERR | ABRT_ERR)) == BBD_ERR ||
545 (err & (ECC_ERR|ID_ERR|MARK_ERR))) {
546 if (drive->addressing == 1) {
548 u32 low = 0, high = 0;
549 low = ide_read_24(drive);
550 hwif->OUTB(drive->ctl|0x80, IDE_CONTROL_REG);
551 high = ide_read_24(drive);
552 sectors = ((__u64)high << 24) | low;
553 printk(", LBAsect=%llu, high=%d, low=%d",
554 (unsigned long long) sectors,
557 u8 cur = hwif->INB(IDE_SELECT_REG);
558 if (cur & 0x40) { /* using LBA? */
559 printk(", LBAsect=%ld", (unsigned long)
561 |(hwif->INB(IDE_HCYL_REG)<<16)
562 |(hwif->INB(IDE_LCYL_REG)<<8)
563 | hwif->INB(IDE_SECTOR_REG));
565 printk(", CHS=%d/%d/%d",
566 (hwif->INB(IDE_HCYL_REG)<<8) +
567 hwif->INB(IDE_LCYL_REG),
569 hwif->INB(IDE_SECTOR_REG));
572 if (HWGROUP(drive) && HWGROUP(drive)->rq)
573 printk(", sector=%llu",
574 (unsigned long long)HWGROUP(drive)->rq->sector);
578 ide_dump_opcode(drive);
579 local_irq_restore(flags);
584 * ide_dump_atapi_status - print human readable atapi status
585 * @drive: drive that status applies to
586 * @msg: text message to print
587 * @stat: status byte to decode
589 * Error reporting, in human readable form (luxurious, but a memory hog).
592 static u8 ide_dump_atapi_status(ide_drive_t *drive, const char *msg, u8 stat)
596 atapi_status_t status;
601 local_irq_save(flags);
602 printk("%s: %s: status=0x%02x { ", drive->name, msg, stat);
606 if (status.b.drdy) printk("DriveReady ");
607 if (status.b.df) printk("DeviceFault ");
608 if (status.b.dsc) printk("SeekComplete ");
609 if (status.b.drq) printk("DataRequest ");
610 if (status.b.corr) printk("CorrectedError ");
611 if (status.b.idx) printk("Index ");
612 if (status.b.check) printk("Error ");
615 if (status.b.check && !status.b.bsy) {
616 error.all = HWIF(drive)->INB(IDE_ERROR_REG);
617 printk("%s: %s: error=0x%02x { ", drive->name, msg, error.all);
618 if (error.b.ili) printk("IllegalLengthIndication ");
619 if (error.b.eom) printk("EndOfMedia ");
620 if (error.b.abrt) printk("AbortedCommand ");
621 if (error.b.mcr) printk("MediaChangeRequested ");
622 if (error.b.sense_key) printk("LastFailedSense=0x%02x ",
626 ide_dump_opcode(drive);
627 local_irq_restore(flags);
632 * ide_dump_status - translate ATA/ATAPI error
633 * @drive: drive the error occured on
634 * @msg: information string
637 * Error reporting, in human readable form (luxurious, but a memory hog).
638 * Combines the drive name, message and status byte to provide a
639 * user understandable explanation of the device error.
642 u8 ide_dump_status(ide_drive_t *drive, const char *msg, u8 stat)
644 if (drive->media == ide_disk)
645 return ide_dump_ata_status(drive, msg, stat);
646 return ide_dump_atapi_status(drive, msg, stat);
649 EXPORT_SYMBOL(ide_dump_status);