sis5513: fail early for unsupported chipsets
[deliverable/linux.git] / drivers / ide / ide-lib.c
CommitLineData
1da177e4
LT
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>
6#include <linux/mm.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>
18
19#include <asm/byteorder.h>
20#include <asm/irq.h>
21#include <asm/uaccess.h>
22#include <asm/io.h>
23
3ab7efe8
BZ
24static const char *udma_str[] =
25 { "UDMA/16", "UDMA/25", "UDMA/33", "UDMA/44",
26 "UDMA/66", "UDMA/100", "UDMA/133", "UDMA7" };
27static const char *mwdma_str[] =
28 { "MWDMA0", "MWDMA1", "MWDMA2" };
29static const char *swdma_str[] =
30 { "SWDMA0", "SWDMA1", "SWDMA2" };
31static const char *pio_str[] =
32 { "PIO0", "PIO1", "PIO2", "PIO3", "PIO4", "PIO5" };
1da177e4
LT
33
34/**
35 * ide_xfer_verbose - return IDE mode names
3ab7efe8 36 * @mode: transfer mode
1da177e4
LT
37 *
38 * Returns a constant string giving the name of the mode
39 * requested.
40 */
41
3ab7efe8 42const char *ide_xfer_verbose(u8 mode)
1da177e4 43{
3ab7efe8
BZ
44 const char *s;
45 u8 i = mode & 0xf;
46
47 if (mode >= XFER_UDMA_0 && mode <= XFER_UDMA_7)
48 s = udma_str[i];
49 else if (mode >= XFER_MW_DMA_0 && mode <= XFER_MW_DMA_2)
50 s = mwdma_str[i];
51 else if (mode >= XFER_SW_DMA_0 && mode <= XFER_SW_DMA_2)
52 s = swdma_str[i];
53 else if (mode >= XFER_PIO_0 && mode <= XFER_PIO_5)
54 s = pio_str[i & 0x7];
55 else if (mode == XFER_PIO_SLOW)
56 s = "PIO SLOW";
57 else
58 s = "XFER ERROR";
59
60 return s;
1da177e4
LT
61}
62
63EXPORT_SYMBOL(ide_xfer_verbose);
64
65/**
2d5eaa6d
BZ
66 * ide_rate_filter - filter transfer mode
67 * @drive: IDE device
1da177e4
LT
68 * @speed: desired speed
69 *
2d5eaa6d 70 * Given the available transfer modes this function returns
1da177e4 71 * the best available speed at or below the speed requested.
2d5eaa6d 72 *
7670df73 73 * TODO: check device PIO capabilities
1da177e4
LT
74 */
75
f212ff28 76static u8 ide_rate_filter(ide_drive_t *drive, u8 speed)
1da177e4 77{
2d5eaa6d 78 ide_hwif_t *hwif = drive->hwif;
7670df73 79 u8 mode = ide_find_dma_mode(drive, speed);
2d5eaa6d 80
7670df73
BZ
81 if (mode == 0) {
82 if (hwif->pio_mask)
83 mode = fls(hwif->pio_mask) - 1 + XFER_PIO_0;
84 else
85 mode = XFER_PIO_4;
86 }
1da177e4
LT
87
88// printk("%s: mode 0x%02x, speed 0x%02x\n", __FUNCTION__, mode, speed);
89
2d5eaa6d 90 return min(speed, mode);
1da177e4
LT
91}
92
1da177e4
LT
93/*
94 * Standard (generic) timings for PIO modes, from ATA2 specification.
95 * These timings are for access to the IDE data port register *only*.
96 * Some drives may specify a mode, while also specifying a different
97 * value for cycle_time (from drive identification data).
98 */
99const ide_pio_timings_t ide_pio_timings[6] = {
100 { 70, 165, 600 }, /* PIO Mode 0 */
101 { 50, 125, 383 }, /* PIO Mode 1 */
102 { 30, 100, 240 }, /* PIO Mode 2 */
103 { 30, 80, 180 }, /* PIO Mode 3 with IORDY */
104 { 25, 70, 120 }, /* PIO Mode 4 with IORDY */
105 { 20, 50, 100 } /* PIO Mode 5 with IORDY (nonstandard) */
106};
107
108EXPORT_SYMBOL_GPL(ide_pio_timings);
109
110/*
111 * Shared data/functions for determining best PIO mode for an IDE drive.
112 * Most of this stuff originally lived in cmd640.c, and changes to the
113 * ide_pio_blacklist[] table should be made with EXTREME CAUTION to avoid
114 * breaking the fragile cmd640.c support.
115 */
116
117/*
118 * Black list. Some drives incorrectly report their maximal PIO mode,
119 * at least in respect to CMD640. Here we keep info on some known drives.
120 */
121static struct ide_pio_info {
122 const char *name;
123 int pio;
124} ide_pio_blacklist [] = {
1da177e4
LT
125 { "Conner Peripherals 540MB - CFS540A", 3 },
126
127 { "WDC AC2700", 3 },
128 { "WDC AC2540", 3 },
129 { "WDC AC2420", 3 },
130 { "WDC AC2340", 3 },
131 { "WDC AC2250", 0 },
132 { "WDC AC2200", 0 },
133 { "WDC AC21200", 4 },
134 { "WDC AC2120", 0 },
135 { "WDC AC2850", 3 },
136 { "WDC AC1270", 3 },
137 { "WDC AC1170", 1 },
138 { "WDC AC1210", 1 },
139 { "WDC AC280", 0 },
1da177e4
LT
140 { "WDC AC31000", 3 },
141 { "WDC AC31200", 3 },
1da177e4
LT
142
143 { "Maxtor 7131 AT", 1 },
144 { "Maxtor 7171 AT", 1 },
145 { "Maxtor 7213 AT", 1 },
146 { "Maxtor 7245 AT", 1 },
147 { "Maxtor 7345 AT", 1 },
148 { "Maxtor 7546 AT", 3 },
149 { "Maxtor 7540 AV", 3 },
150
151 { "SAMSUNG SHD-3121A", 1 },
152 { "SAMSUNG SHD-3122A", 1 },
153 { "SAMSUNG SHD-3172A", 1 },
154
1da177e4
LT
155 { "ST5660A", 3 },
156 { "ST3660A", 3 },
157 { "ST3630A", 3 },
158 { "ST3655A", 3 },
159 { "ST3391A", 3 },
160 { "ST3390A", 1 },
161 { "ST3600A", 1 },
162 { "ST3290A", 0 },
163 { "ST3144A", 0 },
164 { "ST3491A", 1 }, /* reports 3, should be 1 or 2 (depending on */
165 /* drive) according to Seagates FIND-ATA program */
166
167 { "QUANTUM ELS127A", 0 },
168 { "QUANTUM ELS170A", 0 },
169 { "QUANTUM LPS240A", 0 },
170 { "QUANTUM LPS210A", 3 },
171 { "QUANTUM LPS270A", 3 },
172 { "QUANTUM LPS365A", 3 },
173 { "QUANTUM LPS540A", 3 },
174 { "QUANTUM LIGHTNING 540A", 3 },
175 { "QUANTUM LIGHTNING 730A", 3 },
176
177 { "QUANTUM FIREBALL_540", 3 }, /* Older Quantum Fireballs don't work */
178 { "QUANTUM FIREBALL_640", 3 },
179 { "QUANTUM FIREBALL_1080", 3 },
180 { "QUANTUM FIREBALL_1280", 3 },
181 { NULL, 0 }
182};
183
184/**
185 * ide_scan_pio_blacklist - check for a blacklisted drive
186 * @model: Drive model string
187 *
188 * This routine searches the ide_pio_blacklist for an entry
189 * matching the start/whole of the supplied model name.
190 *
191 * Returns -1 if no match found.
192 * Otherwise returns the recommended PIO mode from ide_pio_blacklist[].
193 */
194
195static int ide_scan_pio_blacklist (char *model)
196{
197 struct ide_pio_info *p;
198
199 for (p = ide_pio_blacklist; p->name != NULL; p++) {
200 if (strncmp(p->name, model, strlen(p->name)) == 0)
201 return p->pio;
202 }
203 return -1;
204}
205
7dd00083
BZ
206unsigned int ide_pio_cycle_time(ide_drive_t *drive, u8 pio)
207{
208 struct hd_driveid *id = drive->id;
209 int cycle_time = 0;
210
211 if (id->field_valid & 2) {
212 if (id->capability & 8)
213 cycle_time = id->eide_pio_iordy;
214 else
215 cycle_time = id->eide_pio;
216 }
217
218 /* conservative "downgrade" for all pre-ATA2 drives */
219 if (pio < 3) {
220 if (cycle_time && cycle_time < ide_pio_timings[pio].cycle_time)
221 cycle_time = 0; /* use standard timing */
222 }
223
224 return cycle_time ? cycle_time : ide_pio_timings[pio].cycle_time;
225}
226
227EXPORT_SYMBOL_GPL(ide_pio_cycle_time);
228
1da177e4
LT
229/**
230 * ide_get_best_pio_mode - get PIO mode from drive
81d368e0 231 * @drive: drive to consider
1da177e4 232 * @mode_wanted: preferred mode
81d368e0 233 * @max_mode: highest allowed mode
1da177e4
LT
234 *
235 * This routine returns the recommended PIO settings for a given drive,
236 * based on the drive->id information and the ide_pio_blacklist[].
1da177e4 237 *
81d368e0
SS
238 * Drive PIO mode is auto-selected if 255 is passed as mode_wanted.
239 * This is used by most chipset support modules when "auto-tuning".
1da177e4
LT
240 */
241
2134758d 242u8 ide_get_best_pio_mode (ide_drive_t *drive, u8 mode_wanted, u8 max_mode)
1da177e4
LT
243{
244 int pio_mode;
1da177e4
LT
245 struct hd_driveid* id = drive->id;
246 int overridden = 0;
1da177e4 247
6a824c92
BZ
248 if (mode_wanted != 255)
249 return min_t(u8, mode_wanted, max_mode);
250
251 if ((drive->hwif->host_flags & IDE_HFLAG_PIO_NO_BLACKLIST) == 0 &&
252 (pio_mode = ide_scan_pio_blacklist(id->model)) != -1) {
342cdb6d 253 printk(KERN_INFO "%s: is on PIO blacklist\n", drive->name);
1da177e4
LT
254 } else {
255 pio_mode = id->tPIO;
256 if (pio_mode > 2) { /* 2 is maximum allowed tPIO value */
257 pio_mode = 2;
258 overridden = 1;
259 }
260 if (id->field_valid & 2) { /* drive implements ATA2? */
2229833c 261 if (id->capability & 8) { /* IORDY supported? */
1da177e4
LT
262 if (id->eide_pio_modes & 7) {
263 overridden = 0;
264 if (id->eide_pio_modes & 4)
265 pio_mode = 5;
266 else if (id->eide_pio_modes & 2)
267 pio_mode = 4;
268 else
269 pio_mode = 3;
270 }
1da177e4
LT
271 }
272 }
273
342cdb6d
BZ
274 if (overridden)
275 printk(KERN_INFO "%s: tPIO > 2, assuming tPIO = 2\n",
276 drive->name);
1da177e4 277 }
7dd00083
BZ
278
279 if (pio_mode > max_mode)
1da177e4 280 pio_mode = max_mode;
7dd00083 281
1da177e4
LT
282 return pio_mode;
283}
284
285EXPORT_SYMBOL_GPL(ide_get_best_pio_mode);
286
26bcb879
BZ
287/* req_pio == "255" for auto-tune */
288void ide_set_pio(ide_drive_t *drive, u8 req_pio)
289{
290 ide_hwif_t *hwif = drive->hwif;
291 u8 host_pio, pio;
292
293 if (hwif->set_pio_mode == NULL)
294 return;
295
296 BUG_ON(hwif->pio_mask == 0x00);
297
298 host_pio = fls(hwif->pio_mask) - 1;
299
300 pio = ide_get_best_pio_mode(drive, req_pio, host_pio);
301
302 /*
303 * TODO:
304 * - report device max PIO mode
305 * - check req_pio != 255 against device max PIO mode
306 */
307 printk(KERN_DEBUG "%s: host max PIO%d wanted PIO%d%s selected PIO%d\n",
308 drive->name, host_pio, req_pio,
309 req_pio == 255 ? "(auto-tune)" : "", pio);
310
88b2b32b 311 (void)ide_set_pio_mode(drive, XFER_PIO_0 + pio);
26bcb879
BZ
312}
313
314EXPORT_SYMBOL_GPL(ide_set_pio);
315
1da177e4
LT
316/**
317 * ide_toggle_bounce - handle bounce buffering
318 * @drive: drive to update
319 * @on: on/off boolean
320 *
321 * Enable or disable bounce buffering for the device. Drives move
322 * between PIO and DMA and that changes the rules we need.
323 */
324
325void ide_toggle_bounce(ide_drive_t *drive, int on)
326{
327 u64 addr = BLK_BOUNCE_HIGH; /* dma64_addr_t */
328
6593178d
JB
329 if (!PCI_DMA_BUS_IS_PHYS) {
330 addr = BLK_BOUNCE_ANY;
331 } else if (on && drive->media == ide_disk) {
36501650
BZ
332 struct device *dev = drive->hwif->dev;
333
334 if (dev && dev->dma_mask)
335 addr = *dev->dma_mask;
1da177e4
LT
336 }
337
338 if (drive->queue)
339 blk_queue_bounce_limit(drive->queue, addr);
340}
341
88b2b32b
BZ
342int ide_set_pio_mode(ide_drive_t *drive, const u8 mode)
343{
344 ide_hwif_t *hwif = drive->hwif;
345
346 if (hwif->set_pio_mode == NULL)
347 return -1;
348
349 /*
350 * TODO: temporary hack for some legacy host drivers that didn't
351 * set transfer mode on the device in ->set_pio_mode method...
352 */
353 if (hwif->set_dma_mode == NULL) {
354 hwif->set_pio_mode(drive, mode - XFER_PIO_0);
355 return 0;
356 }
357
358 if (hwif->host_flags & IDE_HFLAG_POST_SET_MODE) {
359 if (ide_config_drive_speed(drive, mode))
360 return -1;
361 hwif->set_pio_mode(drive, mode - XFER_PIO_0);
362 return 0;
363 } else {
364 hwif->set_pio_mode(drive, mode - XFER_PIO_0);
365 return ide_config_drive_speed(drive, mode);
366 }
367}
368
369int ide_set_dma_mode(ide_drive_t *drive, const u8 mode)
370{
371 ide_hwif_t *hwif = drive->hwif;
372
373 if (hwif->set_dma_mode == NULL)
374 return -1;
375
376 if (hwif->host_flags & IDE_HFLAG_POST_SET_MODE) {
377 if (ide_config_drive_speed(drive, mode))
378 return -1;
379 hwif->set_dma_mode(drive, mode);
380 return 0;
381 } else {
382 hwif->set_dma_mode(drive, mode);
383 return ide_config_drive_speed(drive, mode);
384 }
385}
386
387EXPORT_SYMBOL_GPL(ide_set_dma_mode);
388
1da177e4
LT
389/**
390 * ide_set_xfer_rate - set transfer rate
391 * @drive: drive to set
88b2b32b 392 * @rate: speed to attempt to set
1da177e4
LT
393 *
394 * General helper for setting the speed of an IDE device. This
395 * function knows about user enforced limits from the configuration
88b2b32b 396 * which ->set_pio_mode/->set_dma_mode does not.
1da177e4 397 */
88b2b32b 398
1da177e4
LT
399int ide_set_xfer_rate(ide_drive_t *drive, u8 rate)
400{
f212ff28
BZ
401 ide_hwif_t *hwif = drive->hwif;
402
88b2b32b 403 if (hwif->set_dma_mode == NULL)
1da177e4 404 return -1;
f212ff28
BZ
405
406 rate = ide_rate_filter(drive, rate);
407
88b2b32b
BZ
408 if (rate >= XFER_PIO_0 && rate <= XFER_PIO_5)
409 return ide_set_pio_mode(drive, rate);
8f4dd2e4 410
88b2b32b
BZ
411 /*
412 * TODO: transfer modes 0x00-0x07 passed from the user-space are
413 * currently handled here which needs fixing (please note that such
414 * case could happen iff the transfer mode has already been set on
415 * the device by ide-proc.c::set_xfer_rate()).
416 */
4db90a14
BZ
417 if (rate < XFER_PIO_0) {
418 if (hwif->host_flags & IDE_HFLAG_ABUSE_SET_DMA_MODE)
419 return ide_set_dma_mode(drive, rate);
420 else
421 return ide_config_drive_speed(drive, rate);
422 }
8f4dd2e4 423
88b2b32b 424 return ide_set_dma_mode(drive, rate);
1da177e4
LT
425}
426
1da177e4
LT
427static void ide_dump_opcode(ide_drive_t *drive)
428{
429 struct request *rq;
7267c337 430 ide_task_t *task = NULL;
1da177e4
LT
431
432 spin_lock(&ide_lock);
433 rq = NULL;
434 if (HWGROUP(drive))
435 rq = HWGROUP(drive)->rq;
436 spin_unlock(&ide_lock);
437 if (!rq)
438 return;
7267c337
BZ
439
440 if (rq->cmd_type == REQ_TYPE_ATA_TASKFILE)
441 task = rq->special;
1da177e4
LT
442
443 printk("ide: failed opcode was: ");
7267c337
BZ
444 if (task == NULL)
445 printk(KERN_CONT "unknown\n");
1da177e4 446 else
7267c337 447 printk(KERN_CONT "0x%02x\n", task->tf.command);
1da177e4
LT
448}
449
a501633c 450u64 ide_get_lba_addr(struct ide_taskfile *tf, int lba48)
c2b57cdc
BZ
451{
452 u32 high, low;
453
454 if (lba48)
455 high = (tf->hob_lbah << 16) | (tf->hob_lbam << 8) |
456 tf->hob_lbal;
457 else
458 high = tf->device & 0xf;
459 low = (tf->lbah << 16) | (tf->lbam << 8) | tf->lbal;
460
461 return ((u64)high << 24) | low;
462}
a501633c 463EXPORT_SYMBOL_GPL(ide_get_lba_addr);
c2b57cdc
BZ
464
465static void ide_dump_sector(ide_drive_t *drive)
466{
467 ide_task_t task;
468 struct ide_taskfile *tf = &task.tf;
469 int lba48 = (drive->addressing == 1) ? 1 : 0;
470
471 memset(&task, 0, sizeof(task));
472 if (lba48)
473 task.tf_flags = IDE_TFLAG_IN_LBA | IDE_TFLAG_IN_HOB_LBA |
474 IDE_TFLAG_LBA48;
475 else
476 task.tf_flags = IDE_TFLAG_IN_LBA | IDE_TFLAG_IN_DEVICE;
477
478 ide_tf_read(drive, &task);
479
480 if (lba48 || (tf->device & ATA_LBA))
1c904fcf
AM
481 printk(", LBAsect=%llu",
482 (unsigned long long)ide_get_lba_addr(tf, lba48));
c2b57cdc
BZ
483 else
484 printk(", CHS=%d/%d/%d", (tf->lbah << 8) + tf->lbam,
485 tf->device & 0xf, tf->lbal);
486}
487
e62925dd 488static void ide_dump_ata_error(ide_drive_t *drive, u8 err)
1da177e4 489{
e62925dd
BZ
490 printk("{ ");
491 if (err & ABRT_ERR) printk("DriveStatusError ");
492 if (err & ICRC_ERR)
493 printk((err & ABRT_ERR) ? "BadCRC " : "BadSector ");
494 if (err & ECC_ERR) printk("UncorrectableError ");
495 if (err & ID_ERR) printk("SectorIdNotFound ");
496 if (err & TRK0_ERR) printk("TrackZeroNotFound ");
497 if (err & MARK_ERR) printk("AddrMarkNotFound ");
498 printk("}");
499 if ((err & (BBD_ERR | ABRT_ERR)) == BBD_ERR ||
500 (err & (ECC_ERR|ID_ERR|MARK_ERR))) {
501 ide_dump_sector(drive);
502 if (HWGROUP(drive) && HWGROUP(drive)->rq)
503 printk(", sector=%llu",
504 (unsigned long long)HWGROUP(drive)->rq->sector);
1da177e4 505 }
e62925dd
BZ
506 printk("\n");
507}
508
509static void ide_dump_atapi_error(ide_drive_t *drive, u8 err)
510{
511 printk("{ ");
512 if (err & ILI_ERR) printk("IllegalLengthIndication ");
513 if (err & EOM_ERR) printk("EndOfMedia ");
514 if (err & ABRT_ERR) printk("AbortedCommand ");
515 if (err & MCR_ERR) printk("MediaChangeRequested ");
516 if (err & LFS_ERR) printk("LastFailedSense=0x%02x ",
517 (err & LFS_ERR) >> 4);
13bbbf28 518 printk("}\n");
1da177e4
LT
519}
520
521/**
e62925dd 522 * ide_dump_status - translate ATA/ATAPI error
1da177e4
LT
523 * @drive: drive that status applies to
524 * @msg: text message to print
525 * @stat: status byte to decode
526 *
527 * Error reporting, in human readable form (luxurious, but a memory hog).
e62925dd
BZ
528 * Combines the drive name, message and status byte to provide a
529 * user understandable explanation of the device error.
1da177e4
LT
530 */
531
e62925dd 532u8 ide_dump_status(ide_drive_t *drive, const char *msg, u8 stat)
1da177e4
LT
533{
534 unsigned long flags;
0e38a66a 535 u8 err = 0;
1da177e4 536
3d1c1cc9 537 local_irq_save(flags);
1da177e4 538 printk("%s: %s: status=0x%02x { ", drive->name, msg, stat);
22c525b9 539 if (stat & BUSY_STAT)
1da177e4
LT
540 printk("Busy ");
541 else {
22c525b9
BZ
542 if (stat & READY_STAT) printk("DriveReady ");
543 if (stat & WRERR_STAT) printk("DeviceFault ");
544 if (stat & SEEK_STAT) printk("SeekComplete ");
545 if (stat & DRQ_STAT) printk("DataRequest ");
546 if (stat & ECC_STAT) printk("CorrectedError ");
547 if (stat & INDEX_STAT) printk("Index ");
548 if (stat & ERR_STAT) printk("Error ");
1da177e4
LT
549 }
550 printk("}\n");
22c525b9 551 if ((stat & (BUSY_STAT|ERR_STAT)) == ERR_STAT) {
64a57fe4 552 err = ide_read_error(drive);
e62925dd
BZ
553 printk("%s: %s: error=0x%02x ", drive->name, msg, err);
554 if (drive->media == ide_disk)
555 ide_dump_ata_error(drive, err);
556 else
557 ide_dump_atapi_error(drive, err);
1da177e4
LT
558 }
559 ide_dump_opcode(drive);
560 local_irq_restore(flags);
0e38a66a 561 return err;
1da177e4
LT
562}
563
1da177e4 564EXPORT_SYMBOL(ide_dump_status);
This page took 0.345678 seconds and 5 git commands to generate.