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 * TODO: check device PIO capabilities
82 static u8 ide_rate_filter(ide_drive_t *drive, u8 speed)
84 ide_hwif_t *hwif = drive->hwif;
85 u8 mode = ide_find_dma_mode(drive, speed);
89 mode = fls(hwif->pio_mask) - 1 + XFER_PIO_0;
94 // printk("%s: mode 0x%02x, speed 0x%02x\n", __FUNCTION__, mode, speed);
96 return min(speed, mode);
99 int ide_use_fast_pio(ide_drive_t *drive)
101 struct hd_driveid *id = drive->id;
103 if ((id->capability & 1) && drive->autodma)
106 if ((id->capability & 8) || (id->field_valid & 2))
112 EXPORT_SYMBOL_GPL(ide_use_fast_pio);
115 * Standard (generic) timings for PIO modes, from ATA2 specification.
116 * These timings are for access to the IDE data port register *only*.
117 * Some drives may specify a mode, while also specifying a different
118 * value for cycle_time (from drive identification data).
120 const ide_pio_timings_t ide_pio_timings[6] = {
121 { 70, 165, 600 }, /* PIO Mode 0 */
122 { 50, 125, 383 }, /* PIO Mode 1 */
123 { 30, 100, 240 }, /* PIO Mode 2 */
124 { 30, 80, 180 }, /* PIO Mode 3 with IORDY */
125 { 25, 70, 120 }, /* PIO Mode 4 with IORDY */
126 { 20, 50, 100 } /* PIO Mode 5 with IORDY (nonstandard) */
129 EXPORT_SYMBOL_GPL(ide_pio_timings);
132 * Shared data/functions for determining best PIO mode for an IDE drive.
133 * Most of this stuff originally lived in cmd640.c, and changes to the
134 * ide_pio_blacklist[] table should be made with EXTREME CAUTION to avoid
135 * breaking the fragile cmd640.c support.
139 * Black list. Some drives incorrectly report their maximal PIO mode,
140 * at least in respect to CMD640. Here we keep info on some known drives.
142 static struct ide_pio_info {
145 } ide_pio_blacklist [] = {
146 /* { "Conner Peripherals 1275MB - CFS1275A", 4 }, */
147 { "Conner Peripherals 540MB - CFS540A", 3 },
155 { "WDC AC21200", 4 },
162 /* { "WDC AC21000", 4 }, */
163 { "WDC AC31000", 3 },
164 { "WDC AC31200", 3 },
165 /* { "WDC AC31600", 4 }, */
167 { "Maxtor 7131 AT", 1 },
168 { "Maxtor 7171 AT", 1 },
169 { "Maxtor 7213 AT", 1 },
170 { "Maxtor 7245 AT", 1 },
171 { "Maxtor 7345 AT", 1 },
172 { "Maxtor 7546 AT", 3 },
173 { "Maxtor 7540 AV", 3 },
175 { "SAMSUNG SHD-3121A", 1 },
176 { "SAMSUNG SHD-3122A", 1 },
177 { "SAMSUNG SHD-3172A", 1 },
179 /* { "ST51080A", 4 },
195 { "ST3491A", 1 }, /* reports 3, should be 1 or 2 (depending on */
196 /* drive) according to Seagates FIND-ATA program */
198 { "QUANTUM ELS127A", 0 },
199 { "QUANTUM ELS170A", 0 },
200 { "QUANTUM LPS240A", 0 },
201 { "QUANTUM LPS210A", 3 },
202 { "QUANTUM LPS270A", 3 },
203 { "QUANTUM LPS365A", 3 },
204 { "QUANTUM LPS540A", 3 },
205 { "QUANTUM LIGHTNING 540A", 3 },
206 { "QUANTUM LIGHTNING 730A", 3 },
208 { "QUANTUM FIREBALL_540", 3 }, /* Older Quantum Fireballs don't work */
209 { "QUANTUM FIREBALL_640", 3 },
210 { "QUANTUM FIREBALL_1080", 3 },
211 { "QUANTUM FIREBALL_1280", 3 },
216 * ide_scan_pio_blacklist - check for a blacklisted drive
217 * @model: Drive model string
219 * This routine searches the ide_pio_blacklist for an entry
220 * matching the start/whole of the supplied model name.
222 * Returns -1 if no match found.
223 * Otherwise returns the recommended PIO mode from ide_pio_blacklist[].
226 static int ide_scan_pio_blacklist (char *model)
228 struct ide_pio_info *p;
230 for (p = ide_pio_blacklist; p->name != NULL; p++) {
231 if (strncmp(p->name, model, strlen(p->name)) == 0)
237 unsigned int ide_pio_cycle_time(ide_drive_t *drive, u8 pio)
239 struct hd_driveid *id = drive->id;
242 if (id->field_valid & 2) {
243 if (id->capability & 8)
244 cycle_time = id->eide_pio_iordy;
246 cycle_time = id->eide_pio;
249 /* conservative "downgrade" for all pre-ATA2 drives */
251 if (cycle_time && cycle_time < ide_pio_timings[pio].cycle_time)
252 cycle_time = 0; /* use standard timing */
255 return cycle_time ? cycle_time : ide_pio_timings[pio].cycle_time;
258 EXPORT_SYMBOL_GPL(ide_pio_cycle_time);
261 * ide_get_best_pio_mode - get PIO mode from drive
262 * @drive: drive to consider
263 * @mode_wanted: preferred mode
264 * @max_mode: highest allowed mode
266 * This routine returns the recommended PIO settings for a given drive,
267 * based on the drive->id information and the ide_pio_blacklist[].
269 * Drive PIO mode is auto-selected if 255 is passed as mode_wanted.
270 * This is used by most chipset support modules when "auto-tuning".
273 u8 ide_get_best_pio_mode (ide_drive_t *drive, u8 mode_wanted, u8 max_mode)
276 struct hd_driveid* id = drive->id;
279 if (mode_wanted != 255)
280 return min_t(u8, mode_wanted, max_mode);
282 if ((drive->hwif->host_flags & IDE_HFLAG_PIO_NO_BLACKLIST) == 0 &&
283 (pio_mode = ide_scan_pio_blacklist(id->model)) != -1) {
284 printk(KERN_INFO "%s: is on PIO blacklist\n", drive->name);
287 if (pio_mode > 2) { /* 2 is maximum allowed tPIO value */
291 if (id->field_valid & 2) { /* drive implements ATA2? */
292 if (id->capability & 8) { /* IORDY supported? */
293 if (id->eide_pio_modes & 7) {
295 if (id->eide_pio_modes & 4)
297 else if (id->eide_pio_modes & 2)
306 printk(KERN_INFO "%s: tPIO > 2, assuming tPIO = 2\n",
310 * Conservative "downgrade" for all pre-ATA2 drives
312 if ((drive->hwif->host_flags & IDE_HFLAG_PIO_NO_DOWNGRADE) == 0 &&
313 pio_mode && pio_mode < 4) {
315 printk(KERN_INFO "%s: applying conservative "
316 "PIO \"downgrade\"\n", drive->name);
320 if (pio_mode > max_mode)
326 EXPORT_SYMBOL_GPL(ide_get_best_pio_mode);
328 /* req_pio == "255" for auto-tune */
329 void ide_set_pio(ide_drive_t *drive, u8 req_pio)
331 ide_hwif_t *hwif = drive->hwif;
334 if (hwif->set_pio_mode == NULL)
337 BUG_ON(hwif->pio_mask == 0x00);
339 host_pio = fls(hwif->pio_mask) - 1;
341 pio = ide_get_best_pio_mode(drive, req_pio, host_pio);
345 * - report device max PIO mode
346 * - check req_pio != 255 against device max PIO mode
348 printk(KERN_DEBUG "%s: host max PIO%d wanted PIO%d%s selected PIO%d\n",
349 drive->name, host_pio, req_pio,
350 req_pio == 255 ? "(auto-tune)" : "", pio);
352 hwif->set_pio_mode(drive, pio);
355 EXPORT_SYMBOL_GPL(ide_set_pio);
358 * ide_toggle_bounce - handle bounce buffering
359 * @drive: drive to update
360 * @on: on/off boolean
362 * Enable or disable bounce buffering for the device. Drives move
363 * between PIO and DMA and that changes the rules we need.
366 void ide_toggle_bounce(ide_drive_t *drive, int on)
368 u64 addr = BLK_BOUNCE_HIGH; /* dma64_addr_t */
370 if (!PCI_DMA_BUS_IS_PHYS) {
371 addr = BLK_BOUNCE_ANY;
372 } else if (on && drive->media == ide_disk) {
373 if (HWIF(drive)->pci_dev)
374 addr = HWIF(drive)->pci_dev->dma_mask;
378 blk_queue_bounce_limit(drive->queue, addr);
382 * ide_set_xfer_rate - set transfer rate
383 * @drive: drive to set
384 * @speed: speed to attempt to set
386 * General helper for setting the speed of an IDE device. This
387 * function knows about user enforced limits from the configuration
388 * which speedproc() does not. High level drivers should never
389 * invoke speedproc() directly.
392 int ide_set_xfer_rate(ide_drive_t *drive, u8 rate)
394 ide_hwif_t *hwif = drive->hwif;
396 if (hwif->speedproc == NULL)
399 rate = ide_rate_filter(drive, rate);
401 return hwif->speedproc(drive, rate);
404 static void ide_dump_opcode(ide_drive_t *drive)
410 spin_lock(&ide_lock);
413 rq = HWGROUP(drive)->rq;
414 spin_unlock(&ide_lock);
417 if (rq->cmd_type == REQ_TYPE_ATA_CMD ||
418 rq->cmd_type == REQ_TYPE_ATA_TASK) {
419 char *args = rq->buffer;
424 } else if (rq->cmd_type == REQ_TYPE_ATA_TASKFILE) {
425 ide_task_t *args = rq->special;
427 task_struct_t *tf = (task_struct_t *) args->tfRegister;
428 opcode = tf->command;
433 printk("ide: failed opcode was: ");
437 printk("0x%02x\n", opcode);
440 static u8 ide_dump_ata_status(ide_drive_t *drive, const char *msg, u8 stat)
442 ide_hwif_t *hwif = HWIF(drive);
446 local_irq_save(flags);
447 printk("%s: %s: status=0x%02x { ", drive->name, msg, stat);
448 if (stat & BUSY_STAT)
451 if (stat & READY_STAT) printk("DriveReady ");
452 if (stat & WRERR_STAT) printk("DeviceFault ");
453 if (stat & SEEK_STAT) printk("SeekComplete ");
454 if (stat & DRQ_STAT) printk("DataRequest ");
455 if (stat & ECC_STAT) printk("CorrectedError ");
456 if (stat & INDEX_STAT) printk("Index ");
457 if (stat & ERR_STAT) printk("Error ");
460 if ((stat & (BUSY_STAT|ERR_STAT)) == ERR_STAT) {
461 err = hwif->INB(IDE_ERROR_REG);
462 printk("%s: %s: error=0x%02x { ", drive->name, msg, err);
463 if (err & ABRT_ERR) printk("DriveStatusError ");
465 printk((err & ABRT_ERR) ? "BadCRC " : "BadSector ");
466 if (err & ECC_ERR) printk("UncorrectableError ");
467 if (err & ID_ERR) printk("SectorIdNotFound ");
468 if (err & TRK0_ERR) printk("TrackZeroNotFound ");
469 if (err & MARK_ERR) printk("AddrMarkNotFound ");
471 if ((err & (BBD_ERR | ABRT_ERR)) == BBD_ERR ||
472 (err & (ECC_ERR|ID_ERR|MARK_ERR))) {
473 if (drive->addressing == 1) {
475 u32 low = 0, high = 0;
476 low = ide_read_24(drive);
477 hwif->OUTB(drive->ctl|0x80, IDE_CONTROL_REG);
478 high = ide_read_24(drive);
479 sectors = ((__u64)high << 24) | low;
480 printk(", LBAsect=%llu, high=%d, low=%d",
481 (unsigned long long) sectors,
484 u8 cur = hwif->INB(IDE_SELECT_REG);
485 if (cur & 0x40) { /* using LBA? */
486 printk(", LBAsect=%ld", (unsigned long)
488 |(hwif->INB(IDE_HCYL_REG)<<16)
489 |(hwif->INB(IDE_LCYL_REG)<<8)
490 | hwif->INB(IDE_SECTOR_REG));
492 printk(", CHS=%d/%d/%d",
493 (hwif->INB(IDE_HCYL_REG)<<8) +
494 hwif->INB(IDE_LCYL_REG),
496 hwif->INB(IDE_SECTOR_REG));
499 if (HWGROUP(drive) && HWGROUP(drive)->rq)
500 printk(", sector=%llu",
501 (unsigned long long)HWGROUP(drive)->rq->sector);
505 ide_dump_opcode(drive);
506 local_irq_restore(flags);
511 * ide_dump_atapi_status - print human readable atapi status
512 * @drive: drive that status applies to
513 * @msg: text message to print
514 * @stat: status byte to decode
516 * Error reporting, in human readable form (luxurious, but a memory hog).
519 static u8 ide_dump_atapi_status(ide_drive_t *drive, const char *msg, u8 stat)
523 atapi_status_t status;
528 local_irq_save(flags);
529 printk("%s: %s: status=0x%02x { ", drive->name, msg, stat);
533 if (status.b.drdy) printk("DriveReady ");
534 if (status.b.df) printk("DeviceFault ");
535 if (status.b.dsc) printk("SeekComplete ");
536 if (status.b.drq) printk("DataRequest ");
537 if (status.b.corr) printk("CorrectedError ");
538 if (status.b.idx) printk("Index ");
539 if (status.b.check) printk("Error ");
542 if (status.b.check && !status.b.bsy) {
543 error.all = HWIF(drive)->INB(IDE_ERROR_REG);
544 printk("%s: %s: error=0x%02x { ", drive->name, msg, error.all);
545 if (error.b.ili) printk("IllegalLengthIndication ");
546 if (error.b.eom) printk("EndOfMedia ");
547 if (error.b.abrt) printk("AbortedCommand ");
548 if (error.b.mcr) printk("MediaChangeRequested ");
549 if (error.b.sense_key) printk("LastFailedSense=0x%02x ",
553 ide_dump_opcode(drive);
554 local_irq_restore(flags);
559 * ide_dump_status - translate ATA/ATAPI error
560 * @drive: drive the error occured on
561 * @msg: information string
564 * Error reporting, in human readable form (luxurious, but a memory hog).
565 * Combines the drive name, message and status byte to provide a
566 * user understandable explanation of the device error.
569 u8 ide_dump_status(ide_drive_t *drive, const char *msg, u8 stat)
571 if (drive->media == ide_disk)
572 return ide_dump_ata_status(drive, msg, stat);
573 return ide_dump_atapi_status(drive, msg, stat);
576 EXPORT_SYMBOL(ide_dump_status);