ide: don't enable IORDY at a probe time
[linux-2.6.git] / drivers / ide / ide-disk.c
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)blk_rq_sectors(rq);
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 + blk_rq_sectors(rq) > 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=%u, buffer=0x%08lx\n",
199                  drive->name, rq_data_dir(rq) == READ ? "read" : "writ",
200                  (unsigned long long)block, blk_rq_sectors(rq),
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 u64 ide_disk_hpa_get_native_capacity(ide_drive_t *drive, int lba48)
306 {
307         u64 capacity, set_max;
308
309         capacity = drive->capacity64;
310         set_max  = idedisk_read_native_max_address(drive, lba48);
311
312         if (ide_in_drive_list(drive->id, hpa_list)) {
313                 /*
314                  * Since we are inclusive wrt to firmware revisions do this
315                  * extra check and apply the workaround only when needed.
316                  */
317                 if (set_max == capacity + 1)
318                         set_max--;
319         }
320
321         return set_max;
322 }
323
324 static u64 ide_disk_hpa_set_capacity(ide_drive_t *drive, u64 set_max, int lba48)
325 {
326         set_max = idedisk_set_max_address(drive, set_max, lba48);
327         if (set_max)
328                 drive->capacity64 = set_max;
329
330         return set_max;
331 }
332
333 static void idedisk_check_hpa(ide_drive_t *drive)
334 {
335         u64 capacity, set_max;
336         int lba48 = ata_id_lba48_enabled(drive->id);
337
338         capacity = drive->capacity64;
339         set_max  = ide_disk_hpa_get_native_capacity(drive, lba48);
340
341         if (set_max <= capacity)
342                 return;
343
344         drive->probed_capacity = set_max;
345
346         printk(KERN_INFO "%s: Host Protected Area detected.\n"
347                          "\tcurrent capacity is %llu sectors (%llu MB)\n"
348                          "\tnative  capacity is %llu sectors (%llu MB)\n",
349                          drive->name,
350                          capacity, sectors_to_MB(capacity),
351                          set_max, sectors_to_MB(set_max));
352
353         if ((drive->dev_flags & IDE_DFLAG_NOHPA) == 0)
354                 return;
355
356         set_max = ide_disk_hpa_set_capacity(drive, set_max, lba48);
357         if (set_max)
358                 printk(KERN_INFO "%s: Host Protected Area disabled.\n",
359                                  drive->name);
360 }
361
362 static int ide_disk_get_capacity(ide_drive_t *drive)
363 {
364         u16 *id = drive->id;
365         int lba;
366
367         if (ata_id_lba48_enabled(id)) {
368                 /* drive speaks 48-bit LBA */
369                 lba = 1;
370                 drive->capacity64 = ata_id_u64(id, ATA_ID_LBA_CAPACITY_2);
371         } else if (ata_id_has_lba(id) && ata_id_is_lba_capacity_ok(id)) {
372                 /* drive speaks 28-bit LBA */
373                 lba = 1;
374                 drive->capacity64 = ata_id_u32(id, ATA_ID_LBA_CAPACITY);
375         } else {
376                 /* drive speaks boring old 28-bit CHS */
377                 lba = 0;
378                 drive->capacity64 = drive->cyl * drive->head * drive->sect;
379         }
380
381         drive->probed_capacity = drive->capacity64;
382
383         if (lba) {
384                 drive->dev_flags |= IDE_DFLAG_LBA;
385
386                 /*
387                 * If this device supports the Host Protected Area feature set,
388                 * then we may need to change our opinion about its capacity.
389                 */
390                 if (ata_id_hpa_enabled(id))
391                         idedisk_check_hpa(drive);
392         }
393
394         /* limit drive capacity to 137GB if LBA48 cannot be used */
395         if ((drive->dev_flags & IDE_DFLAG_LBA48) == 0 &&
396             drive->capacity64 > 1ULL << 28) {
397                 printk(KERN_WARNING "%s: cannot use LBA48 - full capacity "
398                        "%llu sectors (%llu MB)\n",
399                        drive->name, (unsigned long long)drive->capacity64,
400                        sectors_to_MB(drive->capacity64));
401                 drive->probed_capacity = drive->capacity64 = 1ULL << 28;
402         }
403
404         if ((drive->hwif->host_flags & IDE_HFLAG_NO_LBA48_DMA) &&
405             (drive->dev_flags & IDE_DFLAG_LBA48)) {
406                 if (drive->capacity64 > 1ULL << 28) {
407                         printk(KERN_INFO "%s: cannot use LBA48 DMA - PIO mode"
408                                          " will be used for accessing sectors "
409                                          "> %u\n", drive->name, 1 << 28);
410                 } else
411                         drive->dev_flags &= ~IDE_DFLAG_LBA48;
412         }
413
414         return 0;
415 }
416
417 static u64 ide_disk_set_capacity(ide_drive_t *drive, u64 capacity)
418 {
419         u64 set = min(capacity, drive->probed_capacity);
420         u16 *id = drive->id;
421         int lba48 = ata_id_lba48_enabled(id);
422
423         if ((drive->dev_flags & IDE_DFLAG_LBA) == 0 ||
424             ata_id_hpa_enabled(id) == 0)
425                 goto out;
426
427         /*
428          * according to the spec the SET MAX ADDRESS command shall be
429          * immediately preceded by a READ NATIVE MAX ADDRESS command
430          */
431         capacity = ide_disk_hpa_get_native_capacity(drive, lba48);
432         if (capacity == 0)
433                 goto out;
434
435         set = ide_disk_hpa_set_capacity(drive, set, lba48);
436         if (set) {
437                 /* needed for ->resume to disable HPA */
438                 drive->dev_flags |= IDE_DFLAG_NOHPA;
439                 return set;
440         }
441 out:
442         return drive->capacity64;
443 }
444
445 static void idedisk_prepare_flush(struct request_queue *q, struct request *rq)
446 {
447         ide_drive_t *drive = q->queuedata;
448         struct ide_cmd *cmd = kmalloc(sizeof(*cmd), GFP_ATOMIC);
449
450         /* FIXME: map struct ide_taskfile on rq->cmd[] */
451         BUG_ON(cmd == NULL);
452
453         memset(cmd, 0, sizeof(*cmd));
454         if (ata_id_flush_ext_enabled(drive->id) &&
455             (drive->capacity64 >= (1UL << 28)))
456                 cmd->tf.command = ATA_CMD_FLUSH_EXT;
457         else
458                 cmd->tf.command = ATA_CMD_FLUSH;
459         cmd->valid.out.tf = IDE_VALID_OUT_TF | IDE_VALID_DEVICE;
460         cmd->tf_flags = IDE_TFLAG_DYN;
461         cmd->protocol = ATA_PROT_NODATA;
462
463         rq->cmd_type = REQ_TYPE_ATA_TASKFILE;
464         rq->special = cmd;
465 }
466
467 ide_devset_get(multcount, mult_count);
468
469 /*
470  * This is tightly woven into the driver->do_special can not touch.
471  * DON'T do it again until a total personality rewrite is committed.
472  */
473 static int set_multcount(ide_drive_t *drive, int arg)
474 {
475         struct request *rq;
476         int error;
477
478         if (arg < 0 || arg > (drive->id[ATA_ID_MAX_MULTSECT] & 0xff))
479                 return -EINVAL;
480
481         if (drive->special_flags & IDE_SFLAG_SET_MULTMODE)
482                 return -EBUSY;
483
484         rq = blk_get_request(drive->queue, READ, __GFP_WAIT);
485         rq->cmd_type = REQ_TYPE_ATA_TASKFILE;
486
487         drive->mult_req = arg;
488         drive->special_flags |= IDE_SFLAG_SET_MULTMODE;
489         error = blk_execute_rq(drive->queue, NULL, rq, 0);
490         blk_put_request(rq);
491
492         return (drive->mult_count == arg) ? 0 : -EIO;
493 }
494
495 ide_devset_get_flag(nowerr, IDE_DFLAG_NOWERR);
496
497 static int set_nowerr(ide_drive_t *drive, int arg)
498 {
499         if (arg < 0 || arg > 1)
500                 return -EINVAL;
501
502         if (arg)
503                 drive->dev_flags |= IDE_DFLAG_NOWERR;
504         else
505                 drive->dev_flags &= ~IDE_DFLAG_NOWERR;
506
507         drive->bad_wstat = arg ? BAD_R_STAT : BAD_W_STAT;
508
509         return 0;
510 }
511
512 static int ide_do_setfeature(ide_drive_t *drive, u8 feature, u8 nsect)
513 {
514         struct ide_cmd cmd;
515
516         memset(&cmd, 0, sizeof(cmd));
517         cmd.tf.feature = feature;
518         cmd.tf.nsect   = nsect;
519         cmd.tf.command = ATA_CMD_SET_FEATURES;
520         cmd.valid.out.tf = IDE_VALID_OUT_TF | IDE_VALID_DEVICE;
521         cmd.valid.in.tf  = IDE_VALID_IN_TF  | IDE_VALID_DEVICE;
522
523         return ide_no_data_taskfile(drive, &cmd);
524 }
525
526 static void update_ordered(ide_drive_t *drive)
527 {
528         u16 *id = drive->id;
529         unsigned ordered = QUEUE_ORDERED_NONE;
530         prepare_flush_fn *prep_fn = NULL;
531
532         if (drive->dev_flags & IDE_DFLAG_WCACHE) {
533                 unsigned long long capacity;
534                 int barrier;
535                 /*
536                  * We must avoid issuing commands a drive does not
537                  * understand or we may crash it. We check flush cache
538                  * is supported. We also check we have the LBA48 flush
539                  * cache if the drive capacity is too large. By this
540                  * time we have trimmed the drive capacity if LBA48 is
541                  * not available so we don't need to recheck that.
542                  */
543                 capacity = ide_gd_capacity(drive);
544                 barrier = ata_id_flush_enabled(id) &&
545                         (drive->dev_flags & IDE_DFLAG_NOFLUSH) == 0 &&
546                         ((drive->dev_flags & IDE_DFLAG_LBA48) == 0 ||
547                          capacity <= (1ULL << 28) ||
548                          ata_id_flush_ext_enabled(id));
549
550                 printk(KERN_INFO "%s: cache flushes %ssupported\n",
551                        drive->name, barrier ? "" : "not ");
552
553                 if (barrier) {
554                         ordered = QUEUE_ORDERED_DRAIN_FLUSH;
555                         prep_fn = idedisk_prepare_flush;
556                 }
557         } else
558                 ordered = QUEUE_ORDERED_DRAIN;
559
560         blk_queue_ordered(drive->queue, ordered, prep_fn);
561 }
562
563 ide_devset_get_flag(wcache, IDE_DFLAG_WCACHE);
564
565 static int set_wcache(ide_drive_t *drive, int arg)
566 {
567         int err = 1;
568
569         if (arg < 0 || arg > 1)
570                 return -EINVAL;
571
572         if (ata_id_flush_enabled(drive->id)) {
573                 err = ide_do_setfeature(drive,
574                         arg ? SETFEATURES_WC_ON : SETFEATURES_WC_OFF, 0);
575                 if (err == 0) {
576                         if (arg)
577                                 drive->dev_flags |= IDE_DFLAG_WCACHE;
578                         else
579                                 drive->dev_flags &= ~IDE_DFLAG_WCACHE;
580                 }
581         }
582
583         update_ordered(drive);
584
585         return err;
586 }
587
588 static int do_idedisk_flushcache(ide_drive_t *drive)
589 {
590         struct ide_cmd cmd;
591
592         memset(&cmd, 0, sizeof(cmd));
593         if (ata_id_flush_ext_enabled(drive->id))
594                 cmd.tf.command = ATA_CMD_FLUSH_EXT;
595         else
596                 cmd.tf.command = ATA_CMD_FLUSH;
597         cmd.valid.out.tf = IDE_VALID_OUT_TF | IDE_VALID_DEVICE;
598         cmd.valid.in.tf  = IDE_VALID_IN_TF  | IDE_VALID_DEVICE;
599
600         return ide_no_data_taskfile(drive, &cmd);
601 }
602
603 ide_devset_get(acoustic, acoustic);
604
605 static int set_acoustic(ide_drive_t *drive, int arg)
606 {
607         if (arg < 0 || arg > 254)
608                 return -EINVAL;
609
610         ide_do_setfeature(drive,
611                 arg ? SETFEATURES_AAM_ON : SETFEATURES_AAM_OFF, arg);
612
613         drive->acoustic = arg;
614
615         return 0;
616 }
617
618 ide_devset_get_flag(addressing, IDE_DFLAG_LBA48);
619
620 /*
621  * drive->addressing:
622  *      0: 28-bit
623  *      1: 48-bit
624  *      2: 48-bit capable doing 28-bit
625  */
626 static int set_addressing(ide_drive_t *drive, int arg)
627 {
628         if (arg < 0 || arg > 2)
629                 return -EINVAL;
630
631         if (arg && ((drive->hwif->host_flags & IDE_HFLAG_NO_LBA48) ||
632             ata_id_lba48_enabled(drive->id) == 0))
633                 return -EIO;
634
635         if (arg == 2)
636                 arg = 0;
637
638         if (arg)
639                 drive->dev_flags |= IDE_DFLAG_LBA48;
640         else
641                 drive->dev_flags &= ~IDE_DFLAG_LBA48;
642
643         return 0;
644 }
645
646 ide_ext_devset_rw(acoustic, acoustic);
647 ide_ext_devset_rw(address, addressing);
648 ide_ext_devset_rw(multcount, multcount);
649 ide_ext_devset_rw(wcache, wcache);
650
651 ide_ext_devset_rw_sync(nowerr, nowerr);
652
653 static int ide_disk_check(ide_drive_t *drive, const char *s)
654 {
655         return 1;
656 }
657
658 static void ide_disk_setup(ide_drive_t *drive)
659 {
660         struct ide_disk_obj *idkp = drive->driver_data;
661         struct request_queue *q = drive->queue;
662         ide_hwif_t *hwif = drive->hwif;
663         u16 *id = drive->id;
664         char *m = (char *)&id[ATA_ID_PROD];
665         unsigned long long capacity;
666
667         ide_proc_register_driver(drive, idkp->driver);
668
669         if ((drive->dev_flags & IDE_DFLAG_ID_READ) == 0)
670                 return;
671
672         if (drive->dev_flags & IDE_DFLAG_REMOVABLE) {
673                 /*
674                  * Removable disks (eg. SYQUEST); ignore 'WD' drives
675                  */
676                 if (m[0] != 'W' || m[1] != 'D')
677                         drive->dev_flags |= IDE_DFLAG_DOORLOCKING;
678         }
679
680         (void)set_addressing(drive, 1);
681
682         if (drive->dev_flags & IDE_DFLAG_LBA48) {
683                 int max_s = 2048;
684
685                 if (max_s > hwif->rqsize)
686                         max_s = hwif->rqsize;
687
688                 blk_queue_max_sectors(q, max_s);
689         }
690
691         printk(KERN_INFO "%s: max request size: %dKiB\n", drive->name,
692                queue_max_sectors(q) / 2);
693
694         if (ata_id_is_ssd(id))
695                 queue_flag_set_unlocked(QUEUE_FLAG_NONROT, q);
696
697         /* calculate drive capacity, and select LBA if possible */
698         ide_disk_get_capacity(drive);
699
700         /*
701          * if possible, give fdisk access to more of the drive,
702          * by correcting bios_cyls:
703          */
704         capacity = ide_gd_capacity(drive);
705
706         if ((drive->dev_flags & IDE_DFLAG_FORCED_GEOM) == 0) {
707                 if (ata_id_lba48_enabled(drive->id)) {
708                         /* compatibility */
709                         drive->bios_sect = 63;
710                         drive->bios_head = 255;
711                 }
712
713                 if (drive->bios_sect && drive->bios_head) {
714                         unsigned int cap0 = capacity; /* truncate to 32 bits */
715                         unsigned int cylsz, cyl;
716
717                         if (cap0 != capacity)
718                                 drive->bios_cyl = 65535;
719                         else {
720                                 cylsz = drive->bios_sect * drive->bios_head;
721                                 cyl = cap0 / cylsz;
722                                 if (cyl > 65535)
723                                         cyl = 65535;
724                                 if (cyl > drive->bios_cyl)
725                                         drive->bios_cyl = cyl;
726                         }
727                 }
728         }
729         printk(KERN_INFO "%s: %llu sectors (%llu MB)",
730                          drive->name, capacity, sectors_to_MB(capacity));
731
732         /* Only print cache size when it was specified */
733         if (id[ATA_ID_BUF_SIZE])
734                 printk(KERN_CONT " w/%dKiB Cache", id[ATA_ID_BUF_SIZE] / 2);
735
736         printk(KERN_CONT ", CHS=%d/%d/%d\n",
737                          drive->bios_cyl, drive->bios_head, drive->bios_sect);
738
739         /* write cache enabled? */
740         if ((id[ATA_ID_CSFO] & 1) || ata_id_wcache_enabled(id))
741                 drive->dev_flags |= IDE_DFLAG_WCACHE;
742
743         set_wcache(drive, 1);
744
745         if ((drive->dev_flags & IDE_DFLAG_LBA) == 0 &&
746             (drive->head == 0 || drive->head > 16)) {
747                 printk(KERN_ERR "%s: invalid geometry: %d physical heads?\n",
748                         drive->name, drive->head);
749                 drive->dev_flags &= ~IDE_DFLAG_ATTACH;
750         } else
751                 drive->dev_flags |= IDE_DFLAG_ATTACH;
752 }
753
754 static void ide_disk_flush(ide_drive_t *drive)
755 {
756         if (ata_id_flush_enabled(drive->id) == 0 ||
757             (drive->dev_flags & IDE_DFLAG_WCACHE) == 0)
758                 return;
759
760         if (do_idedisk_flushcache(drive))
761                 printk(KERN_INFO "%s: wcache flush failed!\n", drive->name);
762 }
763
764 static int ide_disk_init_media(ide_drive_t *drive, struct gendisk *disk)
765 {
766         return 0;
767 }
768
769 static int ide_disk_set_doorlock(ide_drive_t *drive, struct gendisk *disk,
770                                  int on)
771 {
772         struct ide_cmd cmd;
773         int ret;
774
775         if ((drive->dev_flags & IDE_DFLAG_DOORLOCKING) == 0)
776                 return 0;
777
778         memset(&cmd, 0, sizeof(cmd));
779         cmd.tf.command = on ? ATA_CMD_MEDIA_LOCK : ATA_CMD_MEDIA_UNLOCK;
780         cmd.valid.out.tf = IDE_VALID_OUT_TF | IDE_VALID_DEVICE;
781         cmd.valid.in.tf  = IDE_VALID_IN_TF  | IDE_VALID_DEVICE;
782
783         ret = ide_no_data_taskfile(drive, &cmd);
784
785         if (ret)
786                 drive->dev_flags &= ~IDE_DFLAG_DOORLOCKING;
787
788         return ret;
789 }
790
791 const struct ide_disk_ops ide_ata_disk_ops = {
792         .check          = ide_disk_check,
793         .set_capacity   = ide_disk_set_capacity,
794         .get_capacity   = ide_disk_get_capacity,
795         .setup          = ide_disk_setup,
796         .flush          = ide_disk_flush,
797         .init_media     = ide_disk_init_media,
798         .set_doorlock   = ide_disk_set_doorlock,
799         .do_request     = ide_do_rw_disk,
800         .ioctl          = ide_disk_ioctl,
801 };