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);
92 * TODO: speed > XFER_UDMA_2 extra check is needed to avoid false
93 * cable warning from eighty_ninty_three(), moving ide_rate_filter()
94 * calls from ->speedproc to core code will make this hack go away
96 if (speed > XFER_UDMA_2) {
97 if ((mask & 0x78) && (eighty_ninty_three(drive) == 0))
102 mode = fls(mask) - 1 + XFER_UDMA_0;
104 // printk("%s: mode 0x%02x, speed 0x%02x\n", __FUNCTION__, mode, speed);
106 return min(speed, mode);
107 #else /* !CONFIG_BLK_DEV_IDEDMA */
108 return min(speed, (u8)XFER_PIO_4);
109 #endif /* CONFIG_BLK_DEV_IDEDMA */
112 EXPORT_SYMBOL(ide_rate_filter);
114 int ide_use_fast_pio(ide_drive_t *drive)
116 struct hd_driveid *id = drive->id;
118 if ((id->capability & 1) && drive->autodma)
121 if ((id->capability & 8) || (id->field_valid & 2))
127 EXPORT_SYMBOL_GPL(ide_use_fast_pio);
130 * Standard (generic) timings for PIO modes, from ATA2 specification.
131 * These timings are for access to the IDE data port register *only*.
132 * Some drives may specify a mode, while also specifying a different
133 * value for cycle_time (from drive identification data).
135 const ide_pio_timings_t ide_pio_timings[6] = {
136 { 70, 165, 600 }, /* PIO Mode 0 */
137 { 50, 125, 383 }, /* PIO Mode 1 */
138 { 30, 100, 240 }, /* PIO Mode 2 */
139 { 30, 80, 180 }, /* PIO Mode 3 with IORDY */
140 { 25, 70, 120 }, /* PIO Mode 4 with IORDY */
141 { 20, 50, 100 } /* PIO Mode 5 with IORDY (nonstandard) */
144 EXPORT_SYMBOL_GPL(ide_pio_timings);
147 * Shared data/functions for determining best PIO mode for an IDE drive.
148 * Most of this stuff originally lived in cmd640.c, and changes to the
149 * ide_pio_blacklist[] table should be made with EXTREME CAUTION to avoid
150 * breaking the fragile cmd640.c support.
154 * Black list. Some drives incorrectly report their maximal PIO mode,
155 * at least in respect to CMD640. Here we keep info on some known drives.
157 static struct ide_pio_info {
160 } ide_pio_blacklist [] = {
161 /* { "Conner Peripherals 1275MB - CFS1275A", 4 }, */
162 { "Conner Peripherals 540MB - CFS540A", 3 },
170 { "WDC AC21200", 4 },
177 /* { "WDC AC21000", 4 }, */
178 { "WDC AC31000", 3 },
179 { "WDC AC31200", 3 },
180 /* { "WDC AC31600", 4 }, */
182 { "Maxtor 7131 AT", 1 },
183 { "Maxtor 7171 AT", 1 },
184 { "Maxtor 7213 AT", 1 },
185 { "Maxtor 7245 AT", 1 },
186 { "Maxtor 7345 AT", 1 },
187 { "Maxtor 7546 AT", 3 },
188 { "Maxtor 7540 AV", 3 },
190 { "SAMSUNG SHD-3121A", 1 },
191 { "SAMSUNG SHD-3122A", 1 },
192 { "SAMSUNG SHD-3172A", 1 },
194 /* { "ST51080A", 4 },
210 { "ST3491A", 1 }, /* reports 3, should be 1 or 2 (depending on */
211 /* drive) according to Seagates FIND-ATA program */
213 { "QUANTUM ELS127A", 0 },
214 { "QUANTUM ELS170A", 0 },
215 { "QUANTUM LPS240A", 0 },
216 { "QUANTUM LPS210A", 3 },
217 { "QUANTUM LPS270A", 3 },
218 { "QUANTUM LPS365A", 3 },
219 { "QUANTUM LPS540A", 3 },
220 { "QUANTUM LIGHTNING 540A", 3 },
221 { "QUANTUM LIGHTNING 730A", 3 },
223 { "QUANTUM FIREBALL_540", 3 }, /* Older Quantum Fireballs don't work */
224 { "QUANTUM FIREBALL_640", 3 },
225 { "QUANTUM FIREBALL_1080", 3 },
226 { "QUANTUM FIREBALL_1280", 3 },
231 * ide_scan_pio_blacklist - check for a blacklisted drive
232 * @model: Drive model string
234 * This routine searches the ide_pio_blacklist for an entry
235 * matching the start/whole of the supplied model name.
237 * Returns -1 if no match found.
238 * Otherwise returns the recommended PIO mode from ide_pio_blacklist[].
241 static int ide_scan_pio_blacklist (char *model)
243 struct ide_pio_info *p;
245 for (p = ide_pio_blacklist; p->name != NULL; p++) {
246 if (strncmp(p->name, model, strlen(p->name)) == 0)
252 unsigned int ide_pio_cycle_time(ide_drive_t *drive, u8 pio)
254 struct hd_driveid *id = drive->id;
257 if (id->field_valid & 2) {
258 if (id->capability & 8)
259 cycle_time = id->eide_pio_iordy;
261 cycle_time = id->eide_pio;
264 /* conservative "downgrade" for all pre-ATA2 drives */
266 if (cycle_time && cycle_time < ide_pio_timings[pio].cycle_time)
267 cycle_time = 0; /* use standard timing */
270 return cycle_time ? cycle_time : ide_pio_timings[pio].cycle_time;
273 EXPORT_SYMBOL_GPL(ide_pio_cycle_time);
276 * ide_get_best_pio_mode - get PIO mode from drive
277 * @drive: drive to consider
278 * @mode_wanted: preferred mode
279 * @max_mode: highest allowed mode
282 * This routine returns the recommended PIO settings for a given drive,
283 * based on the drive->id information and the ide_pio_blacklist[].
285 * Drive PIO mode is auto-selected if 255 is passed as mode_wanted.
286 * This is used by most chipset support modules when "auto-tuning".
289 u8 ide_get_best_pio_mode (ide_drive_t *drive, u8 mode_wanted, u8 max_mode, ide_pio_data_t *d)
292 struct hd_driveid* id = drive->id;
295 if (mode_wanted != 255) {
296 pio_mode = mode_wanted;
297 } else if (!drive->id) {
299 } else if ((pio_mode = ide_scan_pio_blacklist(id->model)) != -1) {
300 printk(KERN_INFO "%s: is on PIO blacklist\n", drive->name);
303 if (pio_mode > 2) { /* 2 is maximum allowed tPIO value */
307 if (id->field_valid & 2) { /* drive implements ATA2? */
308 if (id->capability & 8) { /* IORDY supported? */
309 if (id->eide_pio_modes & 7) {
311 if (id->eide_pio_modes & 4)
313 else if (id->eide_pio_modes & 2)
322 printk(KERN_INFO "%s: tPIO > 2, assuming tPIO = 2\n",
326 * Conservative "downgrade" for all pre-ATA2 drives
328 if (pio_mode && pio_mode < 4) {
330 printk(KERN_INFO "%s: applying conservative "
331 "PIO \"downgrade\"\n", drive->name);
335 if (pio_mode > max_mode)
339 d->pio_mode = pio_mode;
344 EXPORT_SYMBOL_GPL(ide_get_best_pio_mode);
347 * ide_toggle_bounce - handle bounce buffering
348 * @drive: drive to update
349 * @on: on/off boolean
351 * Enable or disable bounce buffering for the device. Drives move
352 * between PIO and DMA and that changes the rules we need.
355 void ide_toggle_bounce(ide_drive_t *drive, int on)
357 u64 addr = BLK_BOUNCE_HIGH; /* dma64_addr_t */
359 if (!PCI_DMA_BUS_IS_PHYS) {
360 addr = BLK_BOUNCE_ANY;
361 } else if (on && drive->media == ide_disk) {
362 if (HWIF(drive)->pci_dev)
363 addr = HWIF(drive)->pci_dev->dma_mask;
367 blk_queue_bounce_limit(drive->queue, addr);
371 * ide_set_xfer_rate - set transfer rate
372 * @drive: drive to set
373 * @speed: speed to attempt to set
375 * General helper for setting the speed of an IDE device. This
376 * function knows about user enforced limits from the configuration
377 * which speedproc() does not. High level drivers should never
378 * invoke speedproc() directly.
381 int ide_set_xfer_rate(ide_drive_t *drive, u8 rate)
383 #ifndef CONFIG_BLK_DEV_IDEDMA
384 rate = min(rate, (u8) XFER_PIO_4);
386 if(HWIF(drive)->speedproc)
387 return HWIF(drive)->speedproc(drive, rate);
392 static void ide_dump_opcode(ide_drive_t *drive)
398 spin_lock(&ide_lock);
401 rq = HWGROUP(drive)->rq;
402 spin_unlock(&ide_lock);
405 if (rq->cmd_type == REQ_TYPE_ATA_CMD ||
406 rq->cmd_type == REQ_TYPE_ATA_TASK) {
407 char *args = rq->buffer;
412 } else if (rq->cmd_type == REQ_TYPE_ATA_TASKFILE) {
413 ide_task_t *args = rq->special;
415 task_struct_t *tf = (task_struct_t *) args->tfRegister;
416 opcode = tf->command;
421 printk("ide: failed opcode was: ");
425 printk("0x%02x\n", opcode);
428 static u8 ide_dump_ata_status(ide_drive_t *drive, const char *msg, u8 stat)
430 ide_hwif_t *hwif = HWIF(drive);
434 local_irq_save(flags);
435 printk("%s: %s: status=0x%02x { ", drive->name, msg, stat);
436 if (stat & BUSY_STAT)
439 if (stat & READY_STAT) printk("DriveReady ");
440 if (stat & WRERR_STAT) printk("DeviceFault ");
441 if (stat & SEEK_STAT) printk("SeekComplete ");
442 if (stat & DRQ_STAT) printk("DataRequest ");
443 if (stat & ECC_STAT) printk("CorrectedError ");
444 if (stat & INDEX_STAT) printk("Index ");
445 if (stat & ERR_STAT) printk("Error ");
448 if ((stat & (BUSY_STAT|ERR_STAT)) == ERR_STAT) {
449 err = hwif->INB(IDE_ERROR_REG);
450 printk("%s: %s: error=0x%02x { ", drive->name, msg, err);
451 if (err & ABRT_ERR) printk("DriveStatusError ");
453 printk((err & ABRT_ERR) ? "BadCRC " : "BadSector ");
454 if (err & ECC_ERR) printk("UncorrectableError ");
455 if (err & ID_ERR) printk("SectorIdNotFound ");
456 if (err & TRK0_ERR) printk("TrackZeroNotFound ");
457 if (err & MARK_ERR) printk("AddrMarkNotFound ");
459 if ((err & (BBD_ERR | ABRT_ERR)) == BBD_ERR ||
460 (err & (ECC_ERR|ID_ERR|MARK_ERR))) {
461 if (drive->addressing == 1) {
463 u32 low = 0, high = 0;
464 low = ide_read_24(drive);
465 hwif->OUTB(drive->ctl|0x80, IDE_CONTROL_REG);
466 high = ide_read_24(drive);
467 sectors = ((__u64)high << 24) | low;
468 printk(", LBAsect=%llu, high=%d, low=%d",
469 (unsigned long long) sectors,
472 u8 cur = hwif->INB(IDE_SELECT_REG);
473 if (cur & 0x40) { /* using LBA? */
474 printk(", LBAsect=%ld", (unsigned long)
476 |(hwif->INB(IDE_HCYL_REG)<<16)
477 |(hwif->INB(IDE_LCYL_REG)<<8)
478 | hwif->INB(IDE_SECTOR_REG));
480 printk(", CHS=%d/%d/%d",
481 (hwif->INB(IDE_HCYL_REG)<<8) +
482 hwif->INB(IDE_LCYL_REG),
484 hwif->INB(IDE_SECTOR_REG));
487 if (HWGROUP(drive) && HWGROUP(drive)->rq)
488 printk(", sector=%llu",
489 (unsigned long long)HWGROUP(drive)->rq->sector);
493 ide_dump_opcode(drive);
494 local_irq_restore(flags);
499 * ide_dump_atapi_status - print human readable atapi status
500 * @drive: drive that status applies to
501 * @msg: text message to print
502 * @stat: status byte to decode
504 * Error reporting, in human readable form (luxurious, but a memory hog).
507 static u8 ide_dump_atapi_status(ide_drive_t *drive, const char *msg, u8 stat)
511 atapi_status_t status;
516 local_irq_save(flags);
517 printk("%s: %s: status=0x%02x { ", drive->name, msg, stat);
521 if (status.b.drdy) printk("DriveReady ");
522 if (status.b.df) printk("DeviceFault ");
523 if (status.b.dsc) printk("SeekComplete ");
524 if (status.b.drq) printk("DataRequest ");
525 if (status.b.corr) printk("CorrectedError ");
526 if (status.b.idx) printk("Index ");
527 if (status.b.check) printk("Error ");
530 if (status.b.check && !status.b.bsy) {
531 error.all = HWIF(drive)->INB(IDE_ERROR_REG);
532 printk("%s: %s: error=0x%02x { ", drive->name, msg, error.all);
533 if (error.b.ili) printk("IllegalLengthIndication ");
534 if (error.b.eom) printk("EndOfMedia ");
535 if (error.b.abrt) printk("AbortedCommand ");
536 if (error.b.mcr) printk("MediaChangeRequested ");
537 if (error.b.sense_key) printk("LastFailedSense=0x%02x ",
541 ide_dump_opcode(drive);
542 local_irq_restore(flags);
547 * ide_dump_status - translate ATA/ATAPI error
548 * @drive: drive the error occured on
549 * @msg: information string
552 * Error reporting, in human readable form (luxurious, but a memory hog).
553 * Combines the drive name, message and status byte to provide a
554 * user understandable explanation of the device error.
557 u8 ide_dump_status(ide_drive_t *drive, const char *msg, u8 stat)
559 if (drive->media == ide_disk)
560 return ide_dump_ata_status(drive, msg, stat);
561 return ide_dump_atapi_status(drive, msg, stat);
564 EXPORT_SYMBOL(ide_dump_status);