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ALSA: sound/ps3: Restructure driver source
[linux-2.6/mini2440.git] / drivers / ide / ide-disk.c
bloba9fbe2c31210cc1400dc2ce132c74211dbd40642
1 /*
2 * Copyright (C) 1994-1998 Linus Torvalds & authors (see below)
3 * Copyright (C) 1998-2002 Linux ATA Development
4 * Andre Hedrick <andre@linux-ide.org>
5 * Copyright (C) 2003 Red Hat
6 * Copyright (C) 2003-2005, 2007 Bartlomiej Zolnierkiewicz
7 */
8
9 /*
10 * Mostly written by Mark Lord <mlord@pobox.com>
11 * and Gadi Oxman <gadio@netvision.net.il>
12 * and Andre Hedrick <andre@linux-ide.org>
13 *
14 * This is the IDE/ATA disk driver, as evolved from hd.c and ide.c.
15 */
16
17 #include <linux/types.h>
18 #include <linux/string.h>
19 #include <linux/kernel.h>
20 #include <linux/timer.h>
21 #include <linux/mm.h>
22 #include <linux/interrupt.h>
23 #include <linux/major.h>
24 #include <linux/errno.h>
25 #include <linux/genhd.h>
26 #include <linux/slab.h>
27 #include <linux/delay.h>
28 #include <linux/mutex.h>
29 #include <linux/leds.h>
30 #include <linux/ide.h>
31
32 #include <asm/byteorder.h>
33 #include <asm/irq.h>
34 #include <asm/uaccess.h>
35 #include <asm/io.h>
36 #include <asm/div64.h>
37
38 #include "ide-disk.h"
39
40 static const u8 ide_rw_cmds[] = {
41 ATA_CMD_READ_MULTI,
42 ATA_CMD_WRITE_MULTI,
43 ATA_CMD_READ_MULTI_EXT,
44 ATA_CMD_WRITE_MULTI_EXT,
45 ATA_CMD_PIO_READ,
46 ATA_CMD_PIO_WRITE,
47 ATA_CMD_PIO_READ_EXT,
48 ATA_CMD_PIO_WRITE_EXT,
49 ATA_CMD_READ,
50 ATA_CMD_WRITE,
51 ATA_CMD_READ_EXT,
52 ATA_CMD_WRITE_EXT,
53 };
54
55 static void ide_tf_set_cmd(ide_drive_t *drive, struct ide_cmd *cmd, u8 dma)
56 {
57 u8 index, lba48, write;
58
59 lba48 = (cmd->tf_flags & IDE_TFLAG_LBA48) ? 2 : 0;
60 write = (cmd->tf_flags & IDE_TFLAG_WRITE) ? 1 : 0;
61
62 if (dma) {
63 cmd->protocol = ATA_PROT_DMA;
64 index = 8;
65 } else {
66 cmd->protocol = ATA_PROT_PIO;
67 if (drive->mult_count) {
68 cmd->tf_flags |= IDE_TFLAG_MULTI_PIO;
69 index = 0;
70 } else
71 index = 4;
72 }
73
74 cmd->tf.command = ide_rw_cmds[index + lba48 + write];
75 }
76
77 /*
78 * __ide_do_rw_disk() issues READ and WRITE commands to a disk,
79 * using LBA if supported, or CHS otherwise, to address sectors.
80 */
81 static ide_startstop_t __ide_do_rw_disk(ide_drive_t *drive, struct request *rq,
82 sector_t block)
83 {
84 ide_hwif_t *hwif = drive->hwif;
85 u16 nsectors = (u16)rq->nr_sectors;
86 u8 lba48 = !!(drive->dev_flags & IDE_DFLAG_LBA48);
87 u8 dma = !!(drive->dev_flags & IDE_DFLAG_USING_DMA);
88 struct ide_cmd cmd;
89 struct ide_taskfile *tf = &cmd.tf;
90 ide_startstop_t rc;
91
92 if ((hwif->host_flags & IDE_HFLAG_NO_LBA48_DMA) && lba48 && dma) {
93 if (block + rq->nr_sectors > 1ULL << 28)
94 dma = 0;
95 else
96 lba48 = 0;
97 }
98
99 memset(&cmd, 0, sizeof(cmd));
100 cmd.valid.out.tf = IDE_VALID_OUT_TF | IDE_VALID_DEVICE;
101 cmd.valid.in.tf = IDE_VALID_IN_TF | IDE_VALID_DEVICE;
102
103 if (drive->dev_flags & IDE_DFLAG_LBA) {
104 if (lba48) {
105 pr_debug("%s: LBA=0x%012llx\n", drive->name,
106 (unsigned long long)block);
107
108 tf->nsect = nsectors & 0xff;
109 tf->lbal = (u8) block;
110 tf->lbam = (u8)(block >> 8);
111 tf->lbah = (u8)(block >> 16);
112 tf->device = ATA_LBA;
113
114 tf = &cmd.hob;
115 tf->nsect = (nsectors >> 8) & 0xff;
116 tf->lbal = (u8)(block >> 24);
117 if (sizeof(block) != 4) {
118 tf->lbam = (u8)((u64)block >> 32);
119 tf->lbah = (u8)((u64)block >> 40);
120 }
121
122 cmd.valid.out.hob = IDE_VALID_OUT_HOB;
123 cmd.valid.in.hob = IDE_VALID_IN_HOB;
124 cmd.tf_flags |= IDE_TFLAG_LBA48;
125 } else {
126 tf->nsect = nsectors & 0xff;
127 tf->lbal = block;
128 tf->lbam = block >>= 8;
129 tf->lbah = block >>= 8;
130 tf->device = ((block >> 8) & 0xf) | ATA_LBA;
131 }
132 } else {
133 unsigned int sect, head, cyl, track;
134
135 track = (int)block / drive->sect;
136 sect = (int)block % drive->sect + 1;
137 head = track % drive->head;
138 cyl = track / drive->head;
139
140 pr_debug("%s: CHS=%u/%u/%u\n", drive->name, cyl, head, sect);
141
142 tf->nsect = nsectors & 0xff;
143 tf->lbal = sect;
144 tf->lbam = cyl;
145 tf->lbah = cyl >> 8;
146 tf->device = head;
147 }
148
149 cmd.tf_flags |= IDE_TFLAG_FS;
150
151 if (rq_data_dir(rq))
152 cmd.tf_flags |= IDE_TFLAG_WRITE;
153
154 ide_tf_set_cmd(drive, &cmd, dma);
155 cmd.rq = rq;
156
157 if (dma == 0) {
158 ide_init_sg_cmd(&cmd, nsectors << 9);
159 ide_map_sg(drive, &cmd);
160 }
161
162 rc = do_rw_taskfile(drive, &cmd);
163
164 if (rc == ide_stopped && dma) {
165 /* fallback to PIO */
166 cmd.tf_flags |= IDE_TFLAG_DMA_PIO_FALLBACK;
167 ide_tf_set_cmd(drive, &cmd, 0);
168 ide_init_sg_cmd(&cmd, nsectors << 9);
169 rc = do_rw_taskfile(drive, &cmd);
170 }
171
172 return rc;
173 }
174
175 /*
176 * 268435455 == 137439 MB or 28bit limit
177 * 320173056 == 163929 MB or 48bit addressing
178 * 1073741822 == 549756 MB or 48bit addressing fake drive
179 */
180
181 static ide_startstop_t ide_do_rw_disk(ide_drive_t *drive, struct request *rq,
182 sector_t block)
183 {
184 ide_hwif_t *hwif = drive->hwif;
185
186 BUG_ON(drive->dev_flags & IDE_DFLAG_BLOCKED);
187
188 if (!blk_fs_request(rq)) {
189 blk_dump_rq_flags(rq, "ide_do_rw_disk - bad command");
190 if (rq->errors == 0)
191 rq->errors = -EIO;
192 ide_complete_rq(drive, -EIO, ide_rq_bytes(rq));
193 return ide_stopped;
194 }
195
196 ledtrig_ide_activity();
197
198 pr_debug("%s: %sing: block=%llu, sectors=%lu, buffer=0x%08lx\n",
199 drive->name, rq_data_dir(rq) == READ ? "read" : "writ",
200 (unsigned long long)block, rq->nr_sectors,
201 (unsigned long)rq->buffer);
202
203 if (hwif->rw_disk)
204 hwif->rw_disk(drive, rq);
205
206 return __ide_do_rw_disk(drive, rq, block);
207 }
208
209 /*
210 * Queries for true maximum capacity of the drive.
211 * Returns maximum LBA address (> 0) of the drive, 0 if failed.
212 */
213 static u64 idedisk_read_native_max_address(ide_drive_t *drive, int lba48)
214 {
215 struct ide_cmd cmd;
216 struct ide_taskfile *tf = &cmd.tf;
217 u64 addr = 0;
218
219 memset(&cmd, 0, sizeof(cmd));
220 if (lba48)
221 tf->command = ATA_CMD_READ_NATIVE_MAX_EXT;
222 else
223 tf->command = ATA_CMD_READ_NATIVE_MAX;
224 tf->device = ATA_LBA;
225
226 cmd.valid.out.tf = IDE_VALID_OUT_TF | IDE_VALID_DEVICE;
227 cmd.valid.in.tf = IDE_VALID_IN_TF | IDE_VALID_DEVICE;
228 if (lba48) {
229 cmd.valid.out.hob = IDE_VALID_OUT_HOB;
230 cmd.valid.in.hob = IDE_VALID_IN_HOB;
231 cmd.tf_flags = IDE_TFLAG_LBA48;
232 }
233
234 ide_no_data_taskfile(drive, &cmd);
235
236 /* if OK, compute maximum address value */
237 if (!(tf->status & ATA_ERR))
238 addr = ide_get_lba_addr(&cmd, lba48) + 1;
239
240 return addr;
241 }
242
243 /*
244 * Sets maximum virtual LBA address of the drive.
245 * Returns new maximum virtual LBA address (> 0) or 0 on failure.
246 */
247 static u64 idedisk_set_max_address(ide_drive_t *drive, u64 addr_req, int lba48)
248 {
249 struct ide_cmd cmd;
250 struct ide_taskfile *tf = &cmd.tf;
251 u64 addr_set = 0;
252
253 addr_req--;
254
255 memset(&cmd, 0, sizeof(cmd));
256 tf->lbal = (addr_req >> 0) & 0xff;
257 tf->lbam = (addr_req >>= 8) & 0xff;
258 tf->lbah = (addr_req >>= 8) & 0xff;
259 if (lba48) {
260 cmd.hob.lbal = (addr_req >>= 8) & 0xff;
261 cmd.hob.lbam = (addr_req >>= 8) & 0xff;
262 cmd.hob.lbah = (addr_req >>= 8) & 0xff;
263 tf->command = ATA_CMD_SET_MAX_EXT;
264 } else {
265 tf->device = (addr_req >>= 8) & 0x0f;
266 tf->command = ATA_CMD_SET_MAX;
267 }
268 tf->device |= ATA_LBA;
269
270 cmd.valid.out.tf = IDE_VALID_OUT_TF | IDE_VALID_DEVICE;
271 cmd.valid.in.tf = IDE_VALID_IN_TF | IDE_VALID_DEVICE;
272 if (lba48) {
273 cmd.valid.out.hob = IDE_VALID_OUT_HOB;
274 cmd.valid.in.hob = IDE_VALID_IN_HOB;
275 cmd.tf_flags = IDE_TFLAG_LBA48;
276 }
277
278 ide_no_data_taskfile(drive, &cmd);
279
280 /* if OK, compute maximum address value */
281 if (!(tf->status & ATA_ERR))
282 addr_set = ide_get_lba_addr(&cmd, lba48) + 1;
283
284 return addr_set;
285 }
286
287 static unsigned long long sectors_to_MB(unsigned long long n)
288 {
289 n <<= 9; /* make it bytes */
290 do_div(n, 1000000); /* make it MB */
291 return n;
292 }
293
294 /*
295 * Some disks report total number of sectors instead of
296 * maximum sector address. We list them here.
297 */
298 static const struct drive_list_entry hpa_list[] = {
299 { "ST340823A", NULL },
300 { "ST320413A", NULL },
301 { "ST310211A", NULL },
302 { NULL, NULL }
303 };
304
305 static void idedisk_check_hpa(ide_drive_t *drive)
306 {
307 unsigned long long capacity, set_max;
308 int lba48 = ata_id_lba48_enabled(drive->id);
309
310 capacity = drive->capacity64;
311
312 set_max = idedisk_read_native_max_address(drive, lba48);
313
314 if (ide_in_drive_list(drive->id, hpa_list)) {
315 /*
316 * Since we are inclusive wrt to firmware revisions do this
317 * extra check and apply the workaround only when needed.
318 */
319 if (set_max == capacity + 1)
320 set_max--;
321 }
322
323 if (set_max <= capacity)
324 return;
325
326 printk(KERN_INFO "%s: Host Protected Area detected.\n"
327 "\tcurrent capacity is %llu sectors (%llu MB)\n"
328 "\tnative capacity is %llu sectors (%llu MB)\n",
329 drive->name,
330 capacity, sectors_to_MB(capacity),
331 set_max, sectors_to_MB(set_max));
332
333 set_max = idedisk_set_max_address(drive, set_max, lba48);
334
335 if (set_max) {
336 drive->capacity64 = set_max;
337 printk(KERN_INFO "%s: Host Protected Area disabled.\n",
338 drive->name);
339 }
340 }
341
342 static int ide_disk_get_capacity(ide_drive_t *drive)
343 {
344 u16 *id = drive->id;
345 int lba;
346
347 if (ata_id_lba48_enabled(id)) {
348 /* drive speaks 48-bit LBA */
349 lba = 1;
350 drive->capacity64 = ata_id_u64(id, ATA_ID_LBA_CAPACITY_2);
351 } else if (ata_id_has_lba(id) && ata_id_is_lba_capacity_ok(id)) {
352 /* drive speaks 28-bit LBA */
353 lba = 1;
354 drive->capacity64 = ata_id_u32(id, ATA_ID_LBA_CAPACITY);
355 } else {
356 /* drive speaks boring old 28-bit CHS */
357 lba = 0;
358 drive->capacity64 = drive->cyl * drive->head * drive->sect;
359 }
360
361 if (lba) {
362 drive->dev_flags |= IDE_DFLAG_LBA;
363
364 /*
365 * If this device supports the Host Protected Area feature set,
366 * then we may need to change our opinion about its capacity.
367 */
368 if (ata_id_hpa_enabled(id))
369 idedisk_check_hpa(drive);
370 }
371
372 /* limit drive capacity to 137GB if LBA48 cannot be used */
373 if ((drive->dev_flags & IDE_DFLAG_LBA48) == 0 &&
374 drive->capacity64 > 1ULL << 28) {
375 printk(KERN_WARNING "%s: cannot use LBA48 - full capacity "
376 "%llu sectors (%llu MB)\n",
377 drive->name, (unsigned long long)drive->capacity64,
378 sectors_to_MB(drive->capacity64));
379 drive->capacity64 = 1ULL << 28;
380 }
381
382 if ((drive->hwif->host_flags & IDE_HFLAG_NO_LBA48_DMA) &&
383 (drive->dev_flags & IDE_DFLAG_LBA48)) {
384 if (drive->capacity64 > 1ULL << 28) {
385 printk(KERN_INFO "%s: cannot use LBA48 DMA - PIO mode"
386 " will be used for accessing sectors "
387 "> %u\n", drive->name, 1 << 28);
388 } else
389 drive->dev_flags &= ~IDE_DFLAG_LBA48;
390 }
391
392 return 0;
393 }
394
395 static void idedisk_prepare_flush(struct request_queue *q, struct request *rq)
396 {
397 ide_drive_t *drive = q->queuedata;
398 struct ide_cmd *cmd = kmalloc(sizeof(*cmd), GFP_ATOMIC);
399
400 /* FIXME: map struct ide_taskfile on rq->cmd[] */
401 BUG_ON(cmd == NULL);
402
403 memset(cmd, 0, sizeof(*cmd));
404 if (ata_id_flush_ext_enabled(drive->id) &&
405 (drive->capacity64 >= (1UL << 28)))
406 cmd->tf.command = ATA_CMD_FLUSH_EXT;
407 else
408 cmd->tf.command = ATA_CMD_FLUSH;
409 cmd->valid.out.tf = IDE_VALID_OUT_TF | IDE_VALID_DEVICE;
410 cmd->tf_flags = IDE_TFLAG_DYN;
411 cmd->protocol = ATA_PROT_NODATA;
412
413 rq->cmd_type = REQ_TYPE_ATA_TASKFILE;
414 rq->cmd_flags |= REQ_SOFTBARRIER;
415 rq->special = cmd;
416 }
417
418 ide_devset_get(multcount, mult_count);
419
420 /*
421 * This is tightly woven into the driver->do_special can not touch.
422 * DON'T do it again until a total personality rewrite is committed.
423 */
424 static int set_multcount(ide_drive_t *drive, int arg)
425 {
426 struct request *rq;
427 int error;
428
429 if (arg < 0 || arg > (drive->id[ATA_ID_MAX_MULTSECT] & 0xff))
430 return -EINVAL;
431
432 if (drive->special.b.set_multmode)
433 return -EBUSY;
434
435 rq = blk_get_request(drive->queue, READ, __GFP_WAIT);
436 rq->cmd_type = REQ_TYPE_ATA_TASKFILE;
437
438 drive->mult_req = arg;
439 drive->special.b.set_multmode = 1;
440 error = blk_execute_rq(drive->queue, NULL, rq, 0);
441 blk_put_request(rq);
442
443 return (drive->mult_count == arg) ? 0 : -EIO;
444 }
445
446 ide_devset_get_flag(nowerr, IDE_DFLAG_NOWERR);
447
448 static int set_nowerr(ide_drive_t *drive, int arg)
449 {
450 if (arg < 0 || arg > 1)
451 return -EINVAL;
452
453 if (arg)
454 drive->dev_flags |= IDE_DFLAG_NOWERR;
455 else
456 drive->dev_flags &= ~IDE_DFLAG_NOWERR;
457
458 drive->bad_wstat = arg ? BAD_R_STAT : BAD_W_STAT;
459
460 return 0;
461 }
462
463 static int ide_do_setfeature(ide_drive_t *drive, u8 feature, u8 nsect)
464 {
465 struct ide_cmd cmd;
466
467 memset(&cmd, 0, sizeof(cmd));
468 cmd.tf.feature = feature;
469 cmd.tf.nsect = nsect;
470 cmd.tf.command = ATA_CMD_SET_FEATURES;
471 cmd.valid.out.tf = IDE_VALID_OUT_TF | IDE_VALID_DEVICE;
472 cmd.valid.in.tf = IDE_VALID_IN_TF | IDE_VALID_DEVICE;
473
474 return ide_no_data_taskfile(drive, &cmd);
475 }
476
477 static void update_ordered(ide_drive_t *drive)
478 {
479 u16 *id = drive->id;
480 unsigned ordered = QUEUE_ORDERED_NONE;
481 prepare_flush_fn *prep_fn = NULL;
482
483 if (drive->dev_flags & IDE_DFLAG_WCACHE) {
484 unsigned long long capacity;
485 int barrier;
486 /*
487 * We must avoid issuing commands a drive does not
488 * understand or we may crash it. We check flush cache
489 * is supported. We also check we have the LBA48 flush
490 * cache if the drive capacity is too large. By this
491 * time we have trimmed the drive capacity if LBA48 is
492 * not available so we don't need to recheck that.
493 */
494 capacity = ide_gd_capacity(drive);
495 barrier = ata_id_flush_enabled(id) &&
496 (drive->dev_flags & IDE_DFLAG_NOFLUSH) == 0 &&
497 ((drive->dev_flags & IDE_DFLAG_LBA48) == 0 ||
498 capacity <= (1ULL << 28) ||
499 ata_id_flush_ext_enabled(id));
500
501 printk(KERN_INFO "%s: cache flushes %ssupported\n",
502 drive->name, barrier ? "" : "not ");
503
504 if (barrier) {
505 ordered = QUEUE_ORDERED_DRAIN_FLUSH;
506 prep_fn = idedisk_prepare_flush;
507 }
508 } else
509 ordered = QUEUE_ORDERED_DRAIN;
510
511 blk_queue_ordered(drive->queue, ordered, prep_fn);
512 }
513
514 ide_devset_get_flag(wcache, IDE_DFLAG_WCACHE);
515
516 static int set_wcache(ide_drive_t *drive, int arg)
517 {
518 int err = 1;
519
520 if (arg < 0 || arg > 1)
521 return -EINVAL;
522
523 if (ata_id_flush_enabled(drive->id)) {
524 err = ide_do_setfeature(drive,
525 arg ? SETFEATURES_WC_ON : SETFEATURES_WC_OFF, 0);
526 if (err == 0) {
527 if (arg)
528 drive->dev_flags |= IDE_DFLAG_WCACHE;
529 else
530 drive->dev_flags &= ~IDE_DFLAG_WCACHE;
531 }
532 }
533
534 update_ordered(drive);
535
536 return err;
537 }
538
539 static int do_idedisk_flushcache(ide_drive_t *drive)
540 {
541 struct ide_cmd cmd;
542
543 memset(&cmd, 0, sizeof(cmd));
544 if (ata_id_flush_ext_enabled(drive->id))
545 cmd.tf.command = ATA_CMD_FLUSH_EXT;
546 else
547 cmd.tf.command = ATA_CMD_FLUSH;
548 cmd.valid.out.tf = IDE_VALID_OUT_TF | IDE_VALID_DEVICE;
549 cmd.valid.in.tf = IDE_VALID_IN_TF | IDE_VALID_DEVICE;
550
551 return ide_no_data_taskfile(drive, &cmd);
552 }
553
554 ide_devset_get(acoustic, acoustic);
555
556 static int set_acoustic(ide_drive_t *drive, int arg)
557 {
558 if (arg < 0 || arg > 254)
559 return -EINVAL;
560
561 ide_do_setfeature(drive,
562 arg ? SETFEATURES_AAM_ON : SETFEATURES_AAM_OFF, arg);
563
564 drive->acoustic = arg;
565
566 return 0;
567 }
568
569 ide_devset_get_flag(addressing, IDE_DFLAG_LBA48);
570
571 /*
572 * drive->addressing:
573 * 0: 28-bit
574 * 1: 48-bit
575 * 2: 48-bit capable doing 28-bit
576 */
577 static int set_addressing(ide_drive_t *drive, int arg)
578 {
579 if (arg < 0 || arg > 2)
580 return -EINVAL;
581
582 if (arg && ((drive->hwif->host_flags & IDE_HFLAG_NO_LBA48) ||
583 ata_id_lba48_enabled(drive->id) == 0))
584 return -EIO;
585
586 if (arg == 2)
587 arg = 0;
588
589 if (arg)
590 drive->dev_flags |= IDE_DFLAG_LBA48;
591 else
592 drive->dev_flags &= ~IDE_DFLAG_LBA48;
593
594 return 0;
595 }
596
597 ide_ext_devset_rw(acoustic, acoustic);
598 ide_ext_devset_rw(address, addressing);
599 ide_ext_devset_rw(multcount, multcount);
600 ide_ext_devset_rw(wcache, wcache);
601
602 ide_ext_devset_rw_sync(nowerr, nowerr);
603
604 static int ide_disk_check(ide_drive_t *drive, const char *s)
605 {
606 return 1;
607 }
608
609 static void ide_disk_setup(ide_drive_t *drive)
610 {
611 struct ide_disk_obj *idkp = drive->driver_data;
612 struct request_queue *q = drive->queue;
613 ide_hwif_t *hwif = drive->hwif;
614 u16 *id = drive->id;
615 char *m = (char *)&id[ATA_ID_PROD];
616 unsigned long long capacity;
617
618 ide_proc_register_driver(drive, idkp->driver);
619
620 if ((drive->dev_flags & IDE_DFLAG_ID_READ) == 0)
621 return;
622
623 if (drive->dev_flags & IDE_DFLAG_REMOVABLE) {
624 /*
625 * Removable disks (eg. SYQUEST); ignore 'WD' drives
626 */
627 if (m[0] != 'W' || m[1] != 'D')
628 drive->dev_flags |= IDE_DFLAG_DOORLOCKING;
629 }
630
631 (void)set_addressing(drive, 1);
632
633 if (drive->dev_flags & IDE_DFLAG_LBA48) {
634 int max_s = 2048;
635
636 if (max_s > hwif->rqsize)
637 max_s = hwif->rqsize;
638
639 blk_queue_max_sectors(q, max_s);
640 }
641
642 printk(KERN_INFO "%s: max request size: %dKiB\n", drive->name,
643 q->max_sectors / 2);
644
645 if (ata_id_is_ssd(id))
646 queue_flag_set_unlocked(QUEUE_FLAG_NONROT, q);
647
648 /* calculate drive capacity, and select LBA if possible */
649 ide_disk_get_capacity(drive);
650
651 /*
652 * if possible, give fdisk access to more of the drive,
653 * by correcting bios_cyls:
654 */
655 capacity = ide_gd_capacity(drive);
656
657 if ((drive->dev_flags & IDE_DFLAG_FORCED_GEOM) == 0) {
658 if (ata_id_lba48_enabled(drive->id)) {
659 /* compatibility */
660 drive->bios_sect = 63;
661 drive->bios_head = 255;
662 }
663
664 if (drive->bios_sect && drive->bios_head) {
665 unsigned int cap0 = capacity; /* truncate to 32 bits */
666 unsigned int cylsz, cyl;
667
668 if (cap0 != capacity)
669 drive->bios_cyl = 65535;
670 else {
671 cylsz = drive->bios_sect * drive->bios_head;
672 cyl = cap0 / cylsz;
673 if (cyl > 65535)
674 cyl = 65535;
675 if (cyl > drive->bios_cyl)
676 drive->bios_cyl = cyl;
677 }
678 }
679 }
680 printk(KERN_INFO "%s: %llu sectors (%llu MB)",
681 drive->name, capacity, sectors_to_MB(capacity));
682
683 /* Only print cache size when it was specified */
684 if (id[ATA_ID_BUF_SIZE])
685 printk(KERN_CONT " w/%dKiB Cache", id[ATA_ID_BUF_SIZE] / 2);
686
687 printk(KERN_CONT ", CHS=%d/%d/%d\n",
688 drive->bios_cyl, drive->bios_head, drive->bios_sect);
689
690 /* write cache enabled? */
691 if ((id[ATA_ID_CSFO] & 1) || ata_id_wcache_enabled(id))
692 drive->dev_flags |= IDE_DFLAG_WCACHE;
693
694 set_wcache(drive, 1);
695
696 if ((drive->dev_flags & IDE_DFLAG_LBA) == 0 &&
697 (drive->head == 0 || drive->head > 16)) {
698 printk(KERN_ERR "%s: invalid geometry: %d physical heads?\n",
699 drive->name, drive->head);
700 drive->dev_flags &= ~IDE_DFLAG_ATTACH;
701 } else
702 drive->dev_flags |= IDE_DFLAG_ATTACH;
703 }
704
705 static void ide_disk_flush(ide_drive_t *drive)
706 {
707 if (ata_id_flush_enabled(drive->id) == 0 ||
708 (drive->dev_flags & IDE_DFLAG_WCACHE) == 0)
709 return;
710
711 if (do_idedisk_flushcache(drive))
712 printk(KERN_INFO "%s: wcache flush failed!\n", drive->name);
713 }
714
715 static int ide_disk_init_media(ide_drive_t *drive, struct gendisk *disk)
716 {
717 return 0;
718 }
719
720 static int ide_disk_set_doorlock(ide_drive_t *drive, struct gendisk *disk,
721 int on)
722 {
723 struct ide_cmd cmd;
724 int ret;
725
726 if ((drive->dev_flags & IDE_DFLAG_DOORLOCKING) == 0)
727 return 0;
728
729 memset(&cmd, 0, sizeof(cmd));
730 cmd.tf.command = on ? ATA_CMD_MEDIA_LOCK : ATA_CMD_MEDIA_UNLOCK;
731 cmd.valid.out.tf = IDE_VALID_OUT_TF | IDE_VALID_DEVICE;
732 cmd.valid.in.tf = IDE_VALID_IN_TF | IDE_VALID_DEVICE;
733
734 ret = ide_no_data_taskfile(drive, &cmd);
735
736 if (ret)
737 drive->dev_flags &= ~IDE_DFLAG_DOORLOCKING;
738
739 return ret;
740 }
741
742 const struct ide_disk_ops ide_ata_disk_ops = {
743 .check = ide_disk_check,
744 .get_capacity = ide_disk_get_capacity,
745 .setup = ide_disk_setup,
746 .flush = ide_disk_flush,
747 .init_media = ide_disk_init_media,
748 .set_doorlock = ide_disk_set_doorlock,
749 .do_request = ide_do_rw_disk,
750 .ioctl = ide_disk_ioctl,
751 };
Support for the Chinese Samsung S3C2440 based development boards