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
281 * This routine returns the recommended PIO settings for a given drive,
282 * based on the drive->id information and the ide_pio_blacklist[].
284 * Drive PIO mode is auto-selected if 255 is passed as mode_wanted.
285 * This is used by most chipset support modules when "auto-tuning".
288 u8
ide_get_best_pio_mode (ide_drive_t
*drive
, u8 mode_wanted
, u8 max_mode
)
291 struct hd_driveid
* id
= drive
->id
;
294 if (mode_wanted
!= 255)
295 return min_t(u8
, mode_wanted
, max_mode
);
297 if ((drive
->hwif
->host_flags
& IDE_HFLAG_PIO_NO_BLACKLIST
) == 0 &&
298 (pio_mode
= ide_scan_pio_blacklist(id
->model
)) != -1) {
299 printk(KERN_INFO
"%s: is on PIO blacklist\n", drive
->name
);
302 if (pio_mode
> 2) { /* 2 is maximum allowed tPIO value */
306 if (id
->field_valid
& 2) { /* drive implements ATA2? */
307 if (id
->capability
& 8) { /* IORDY supported? */
308 if (id
->eide_pio_modes
& 7) {
310 if (id
->eide_pio_modes
& 4)
312 else if (id
->eide_pio_modes
& 2)
321 printk(KERN_INFO
"%s: tPIO > 2, assuming tPIO = 2\n",
325 * Conservative "downgrade" for all pre-ATA2 drives
327 if ((drive
->hwif
->host_flags
& IDE_HFLAG_PIO_NO_DOWNGRADE
) == 0 &&
328 pio_mode
&& pio_mode
< 4) {
330 printk(KERN_INFO
"%s: applying conservative "
331 "PIO \"downgrade\"\n", drive
->name
);
335 if (pio_mode
> max_mode
)
341 EXPORT_SYMBOL_GPL(ide_get_best_pio_mode
);
344 * ide_toggle_bounce - handle bounce buffering
345 * @drive: drive to update
346 * @on: on/off boolean
348 * Enable or disable bounce buffering for the device. Drives move
349 * between PIO and DMA and that changes the rules we need.
352 void ide_toggle_bounce(ide_drive_t
*drive
, int on
)
354 u64 addr
= BLK_BOUNCE_HIGH
; /* dma64_addr_t */
356 if (!PCI_DMA_BUS_IS_PHYS
) {
357 addr
= BLK_BOUNCE_ANY
;
358 } else if (on
&& drive
->media
== ide_disk
) {
359 if (HWIF(drive
)->pci_dev
)
360 addr
= HWIF(drive
)->pci_dev
->dma_mask
;
364 blk_queue_bounce_limit(drive
->queue
, addr
);
368 * ide_set_xfer_rate - set transfer rate
369 * @drive: drive to set
370 * @speed: speed to attempt to set
372 * General helper for setting the speed of an IDE device. This
373 * function knows about user enforced limits from the configuration
374 * which speedproc() does not. High level drivers should never
375 * invoke speedproc() directly.
378 int ide_set_xfer_rate(ide_drive_t
*drive
, u8 rate
)
380 #ifndef CONFIG_BLK_DEV_IDEDMA
381 rate
= min(rate
, (u8
) XFER_PIO_4
);
383 if(HWIF(drive
)->speedproc
)
384 return HWIF(drive
)->speedproc(drive
, rate
);
389 static void ide_dump_opcode(ide_drive_t
*drive
)
395 spin_lock(&ide_lock
);
398 rq
= HWGROUP(drive
)->rq
;
399 spin_unlock(&ide_lock
);
402 if (rq
->cmd_type
== REQ_TYPE_ATA_CMD
||
403 rq
->cmd_type
== REQ_TYPE_ATA_TASK
) {
404 char *args
= rq
->buffer
;
409 } else if (rq
->cmd_type
== REQ_TYPE_ATA_TASKFILE
) {
410 ide_task_t
*args
= rq
->special
;
412 task_struct_t
*tf
= (task_struct_t
*) args
->tfRegister
;
413 opcode
= tf
->command
;
418 printk("ide: failed opcode was: ");
422 printk("0x%02x\n", opcode
);
425 static u8
ide_dump_ata_status(ide_drive_t
*drive
, const char *msg
, u8 stat
)
427 ide_hwif_t
*hwif
= HWIF(drive
);
431 local_irq_save(flags
);
432 printk("%s: %s: status=0x%02x { ", drive
->name
, msg
, stat
);
433 if (stat
& BUSY_STAT
)
436 if (stat
& READY_STAT
) printk("DriveReady ");
437 if (stat
& WRERR_STAT
) printk("DeviceFault ");
438 if (stat
& SEEK_STAT
) printk("SeekComplete ");
439 if (stat
& DRQ_STAT
) printk("DataRequest ");
440 if (stat
& ECC_STAT
) printk("CorrectedError ");
441 if (stat
& INDEX_STAT
) printk("Index ");
442 if (stat
& ERR_STAT
) printk("Error ");
445 if ((stat
& (BUSY_STAT
|ERR_STAT
)) == ERR_STAT
) {
446 err
= hwif
->INB(IDE_ERROR_REG
);
447 printk("%s: %s: error=0x%02x { ", drive
->name
, msg
, err
);
448 if (err
& ABRT_ERR
) printk("DriveStatusError ");
450 printk((err
& ABRT_ERR
) ? "BadCRC " : "BadSector ");
451 if (err
& ECC_ERR
) printk("UncorrectableError ");
452 if (err
& ID_ERR
) printk("SectorIdNotFound ");
453 if (err
& TRK0_ERR
) printk("TrackZeroNotFound ");
454 if (err
& MARK_ERR
) printk("AddrMarkNotFound ");
456 if ((err
& (BBD_ERR
| ABRT_ERR
)) == BBD_ERR
||
457 (err
& (ECC_ERR
|ID_ERR
|MARK_ERR
))) {
458 if (drive
->addressing
== 1) {
460 u32 low
= 0, high
= 0;
461 low
= ide_read_24(drive
);
462 hwif
->OUTB(drive
->ctl
|0x80, IDE_CONTROL_REG
);
463 high
= ide_read_24(drive
);
464 sectors
= ((__u64
)high
<< 24) | low
;
465 printk(", LBAsect=%llu, high=%d, low=%d",
466 (unsigned long long) sectors
,
469 u8 cur
= hwif
->INB(IDE_SELECT_REG
);
470 if (cur
& 0x40) { /* using LBA? */
471 printk(", LBAsect=%ld", (unsigned long)
473 |(hwif
->INB(IDE_HCYL_REG
)<<16)
474 |(hwif
->INB(IDE_LCYL_REG
)<<8)
475 | hwif
->INB(IDE_SECTOR_REG
));
477 printk(", CHS=%d/%d/%d",
478 (hwif
->INB(IDE_HCYL_REG
)<<8) +
479 hwif
->INB(IDE_LCYL_REG
),
481 hwif
->INB(IDE_SECTOR_REG
));
484 if (HWGROUP(drive
) && HWGROUP(drive
)->rq
)
485 printk(", sector=%llu",
486 (unsigned long long)HWGROUP(drive
)->rq
->sector
);
490 ide_dump_opcode(drive
);
491 local_irq_restore(flags
);
496 * ide_dump_atapi_status - print human readable atapi status
497 * @drive: drive that status applies to
498 * @msg: text message to print
499 * @stat: status byte to decode
501 * Error reporting, in human readable form (luxurious, but a memory hog).
504 static u8
ide_dump_atapi_status(ide_drive_t
*drive
, const char *msg
, u8 stat
)
508 atapi_status_t status
;
513 local_irq_save(flags
);
514 printk("%s: %s: status=0x%02x { ", drive
->name
, msg
, stat
);
518 if (status
.b
.drdy
) printk("DriveReady ");
519 if (status
.b
.df
) printk("DeviceFault ");
520 if (status
.b
.dsc
) printk("SeekComplete ");
521 if (status
.b
.drq
) printk("DataRequest ");
522 if (status
.b
.corr
) printk("CorrectedError ");
523 if (status
.b
.idx
) printk("Index ");
524 if (status
.b
.check
) printk("Error ");
527 if (status
.b
.check
&& !status
.b
.bsy
) {
528 error
.all
= HWIF(drive
)->INB(IDE_ERROR_REG
);
529 printk("%s: %s: error=0x%02x { ", drive
->name
, msg
, error
.all
);
530 if (error
.b
.ili
) printk("IllegalLengthIndication ");
531 if (error
.b
.eom
) printk("EndOfMedia ");
532 if (error
.b
.abrt
) printk("AbortedCommand ");
533 if (error
.b
.mcr
) printk("MediaChangeRequested ");
534 if (error
.b
.sense_key
) printk("LastFailedSense=0x%02x ",
538 ide_dump_opcode(drive
);
539 local_irq_restore(flags
);
544 * ide_dump_status - translate ATA/ATAPI error
545 * @drive: drive the error occured on
546 * @msg: information string
549 * Error reporting, in human readable form (luxurious, but a memory hog).
550 * Combines the drive name, message and status byte to provide a
551 * user understandable explanation of the device error.
554 u8
ide_dump_status(ide_drive_t
*drive
, const char *msg
, u8 stat
)
556 if (drive
->media
== ide_disk
)
557 return ide_dump_ata_status(drive
, msg
, stat
);
558 return ide_dump_atapi_status(drive
, msg
, stat
);
561 EXPORT_SYMBOL(ide_dump_status
);