blob: dad9c47ebb69bb0aa667689f701301a34118c115 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * linux/drivers/ide/ide-probe.c Version 1.11 Mar 05, 2003
3 *
4 * Copyright (C) 1994-1998 Linus Torvalds & authors (see below)
5 */
6
7/*
8 * Mostly written by Mark Lord <mlord@pobox.com>
9 * and Gadi Oxman <gadio@netvision.net.il>
10 * and Andre Hedrick <andre@linux-ide.org>
11 *
12 * See linux/MAINTAINERS for address of current maintainer.
13 *
14 * This is the IDE probe module, as evolved from hd.c and ide.c.
15 *
16 * Version 1.00 move drive probing code from ide.c to ide-probe.c
17 * Version 1.01 fix compilation problem for m68k
18 * Version 1.02 increase WAIT_PIDENTIFY to avoid CD-ROM locking at boot
19 * by Andrea Arcangeli
20 * Version 1.03 fix for (hwif->chipset == ide_4drives)
21 * Version 1.04 fixed buggy treatments of known flash memory cards
22 *
23 * Version 1.05 fix for (hwif->chipset == ide_pdc4030)
24 * added ide6/7/8/9
25 * allowed for secondary flash card to be detectable
26 * with new flag : drive->ata_flash : 1;
27 * Version 1.06 stream line request queue and prep for cascade project.
28 * Version 1.07 max_sect <= 255; slower disks would get behind and
29 * then fall over when they get to 256. Paul G.
30 * Version 1.10 Update set for new IDE. drive->id is now always
31 * valid after probe time even with noprobe
32 */
33
34#undef REALLY_SLOW_IO /* most systems can safely undef this */
35
Linus Torvalds1da177e2005-04-16 15:20:36 -070036#include <linux/module.h>
37#include <linux/types.h>
38#include <linux/string.h>
39#include <linux/kernel.h>
40#include <linux/timer.h>
41#include <linux/mm.h>
42#include <linux/interrupt.h>
43#include <linux/major.h>
44#include <linux/errno.h>
45#include <linux/genhd.h>
46#include <linux/slab.h>
47#include <linux/delay.h>
48#include <linux/ide.h>
49#include <linux/spinlock.h>
50#include <linux/kmod.h>
51#include <linux/pci.h>
52
53#include <asm/byteorder.h>
54#include <asm/irq.h>
55#include <asm/uaccess.h>
56#include <asm/io.h>
57
58/**
59 * generic_id - add a generic drive id
60 * @drive: drive to make an ID block for
61 *
62 * Add a fake id field to the drive we are passed. This allows
63 * use to skip a ton of NULL checks (which people always miss)
64 * and make drive properties unconditional outside of this file
65 */
66
67static void generic_id(ide_drive_t *drive)
68{
69 drive->id->cyls = drive->cyl;
70 drive->id->heads = drive->head;
71 drive->id->sectors = drive->sect;
72 drive->id->cur_cyls = drive->cyl;
73 drive->id->cur_heads = drive->head;
74 drive->id->cur_sectors = drive->sect;
75}
76
77static void ide_disk_init_chs(ide_drive_t *drive)
78{
79 struct hd_driveid *id = drive->id;
80
81 /* Extract geometry if we did not already have one for the drive */
82 if (!drive->cyl || !drive->head || !drive->sect) {
83 drive->cyl = drive->bios_cyl = id->cyls;
84 drive->head = drive->bios_head = id->heads;
85 drive->sect = drive->bios_sect = id->sectors;
86 }
87
88 /* Handle logical geometry translation by the drive */
89 if ((id->field_valid & 1) && id->cur_cyls &&
90 id->cur_heads && (id->cur_heads <= 16) && id->cur_sectors) {
91 drive->cyl = id->cur_cyls;
92 drive->head = id->cur_heads;
93 drive->sect = id->cur_sectors;
94 }
95
96 /* Use physical geometry if what we have still makes no sense */
97 if (drive->head > 16 && id->heads && id->heads <= 16) {
98 drive->cyl = id->cyls;
99 drive->head = id->heads;
100 drive->sect = id->sectors;
101 }
102}
103
104static void ide_disk_init_mult_count(ide_drive_t *drive)
105{
106 struct hd_driveid *id = drive->id;
107
108 drive->mult_count = 0;
109 if (id->max_multsect) {
110#ifdef CONFIG_IDEDISK_MULTI_MODE
111 id->multsect = ((id->max_multsect/2) > 1) ? id->max_multsect : 0;
112 id->multsect_valid = id->multsect ? 1 : 0;
113 drive->mult_req = id->multsect_valid ? id->max_multsect : INITIAL_MULT_COUNT;
114 drive->special.b.set_multmode = drive->mult_req ? 1 : 0;
115#else /* original, pre IDE-NFG, per request of AC */
116 drive->mult_req = INITIAL_MULT_COUNT;
117 if (drive->mult_req > id->max_multsect)
118 drive->mult_req = id->max_multsect;
119 if (drive->mult_req || ((id->multsect_valid & 1) && id->multsect))
120 drive->special.b.set_multmode = 1;
121#endif
122 }
123}
124
125/**
Linus Torvalds1da177e2005-04-16 15:20:36 -0700126 * do_identify - identify a drive
127 * @drive: drive to identify
128 * @cmd: command used
129 *
130 * Called when we have issued a drive identify command to
131 * read and parse the results. This function is run with
132 * interrupts disabled.
133 */
134
135static inline void do_identify (ide_drive_t *drive, u8 cmd)
136{
137 ide_hwif_t *hwif = HWIF(drive);
138 int bswap = 1;
139 struct hd_driveid *id;
140
141 id = drive->id;
142 /* read 512 bytes of id info */
143 hwif->ata_input_data(drive, id, SECTOR_WORDS);
144
145 drive->id_read = 1;
146 local_irq_enable();
147 ide_fix_driveid(id);
148
149#if defined (CONFIG_SCSI_EATA_DMA) || defined (CONFIG_SCSI_EATA_PIO) || defined (CONFIG_SCSI_EATA)
150 /*
151 * EATA SCSI controllers do a hardware ATA emulation:
152 * Ignore them if there is a driver for them available.
153 */
154 if ((id->model[0] == 'P' && id->model[1] == 'M') ||
155 (id->model[0] == 'S' && id->model[1] == 'K')) {
156 printk("%s: EATA SCSI HBA %.10s\n", drive->name, id->model);
157 goto err_misc;
158 }
159#endif /* CONFIG_SCSI_EATA_DMA || CONFIG_SCSI_EATA_PIO */
160
161 /*
162 * WIN_IDENTIFY returns little-endian info,
163 * WIN_PIDENTIFY *usually* returns little-endian info.
164 */
165 if (cmd == WIN_PIDENTIFY) {
166 if ((id->model[0] == 'N' && id->model[1] == 'E') /* NEC */
167 || (id->model[0] == 'F' && id->model[1] == 'X') /* Mitsumi */
168 || (id->model[0] == 'P' && id->model[1] == 'i'))/* Pioneer */
169 /* Vertos drives may still be weird */
170 bswap ^= 1;
171 }
172 ide_fixstring(id->model, sizeof(id->model), bswap);
173 ide_fixstring(id->fw_rev, sizeof(id->fw_rev), bswap);
174 ide_fixstring(id->serial_no, sizeof(id->serial_no), bswap);
175
176 if (strstr(id->model, "E X A B Y T E N E S T"))
177 goto err_misc;
178
179 /* we depend on this a lot! */
180 id->model[sizeof(id->model)-1] = '\0';
181 printk("%s: %s, ", drive->name, id->model);
182 drive->present = 1;
183 drive->dead = 0;
184
185 /*
186 * Check for an ATAPI device
187 */
188 if (cmd == WIN_PIDENTIFY) {
189 u8 type = (id->config >> 8) & 0x1f;
190 printk("ATAPI ");
191 switch (type) {
192 case ide_floppy:
193 if (!strstr(id->model, "CD-ROM")) {
194 if (!strstr(id->model, "oppy") &&
195 !strstr(id->model, "poyp") &&
196 !strstr(id->model, "ZIP"))
197 printk("cdrom or floppy?, assuming ");
198 if (drive->media != ide_cdrom) {
199 printk ("FLOPPY");
200 drive->removable = 1;
201 break;
202 }
203 }
204 /* Early cdrom models used zero */
205 type = ide_cdrom;
206 case ide_cdrom:
207 drive->removable = 1;
208#ifdef CONFIG_PPC
209 /* kludge for Apple PowerBook internal zip */
210 if (!strstr(id->model, "CD-ROM") &&
211 strstr(id->model, "ZIP")) {
212 printk ("FLOPPY");
213 type = ide_floppy;
214 break;
215 }
216#endif
217 printk ("CD/DVD-ROM");
218 break;
219 case ide_tape:
220 printk ("TAPE");
221 break;
222 case ide_optical:
223 printk ("OPTICAL");
224 drive->removable = 1;
225 break;
226 default:
227 printk("UNKNOWN (type %d)", type);
228 break;
229 }
230 printk (" drive\n");
231 drive->media = type;
232 /* an ATAPI device ignores DRDY */
233 drive->ready_stat = 0;
234 return;
235 }
236
237 /*
238 * Not an ATAPI device: looks like a "regular" hard disk
239 */
Richard Purdie98109332006-02-03 03:04:55 -0800240
241 /*
242 * 0x848a = CompactFlash device
243 * These are *not* removable in Linux definition of the term
244 */
245
246 if ((id->config != 0x848a) && (id->config & (1<<7)))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700247 drive->removable = 1;
248
Linus Torvalds1da177e2005-04-16 15:20:36 -0700249 drive->media = ide_disk;
Richard Purdie98109332006-02-03 03:04:55 -0800250 printk("%s DISK drive\n", (id->config == 0x848a) ? "CFA" : "ATA" );
Linus Torvalds1da177e2005-04-16 15:20:36 -0700251 QUIRK_LIST(drive);
252 return;
253
254err_misc:
255 kfree(id);
256 drive->present = 0;
257 return;
258}
259
260/**
261 * actual_try_to_identify - send ata/atapi identify
262 * @drive: drive to identify
263 * @cmd: command to use
264 *
265 * try_to_identify() sends an ATA(PI) IDENTIFY request to a drive
266 * and waits for a response. It also monitors irqs while this is
267 * happening, in hope of automatically determining which one is
268 * being used by the interface.
269 *
270 * Returns: 0 device was identified
271 * 1 device timed-out (no response to identify request)
272 * 2 device aborted the command (refused to identify itself)
273 */
274
275static int actual_try_to_identify (ide_drive_t *drive, u8 cmd)
276{
277 ide_hwif_t *hwif = HWIF(drive);
278 int rc;
279 unsigned long hd_status;
280 unsigned long timeout;
281 u8 s = 0, a = 0;
282
283 /* take a deep breath */
284 msleep(50);
285
286 if (IDE_CONTROL_REG) {
287 a = hwif->INB(IDE_ALTSTATUS_REG);
288 s = hwif->INB(IDE_STATUS_REG);
289 if ((a ^ s) & ~INDEX_STAT) {
290 printk(KERN_INFO "%s: probing with STATUS(0x%02x) instead of "
291 "ALTSTATUS(0x%02x)\n", drive->name, s, a);
292 /* ancient Seagate drives, broken interfaces */
293 hd_status = IDE_STATUS_REG;
294 } else {
295 /* use non-intrusive polling */
296 hd_status = IDE_ALTSTATUS_REG;
297 }
298 } else
299 hd_status = IDE_STATUS_REG;
300
301 /* set features register for atapi
302 * identify command to be sure of reply
303 */
304 if ((cmd == WIN_PIDENTIFY))
305 /* disable dma & overlap */
306 hwif->OUTB(0, IDE_FEATURE_REG);
307
308 /* ask drive for ID */
309 hwif->OUTB(cmd, IDE_COMMAND_REG);
310
311 timeout = ((cmd == WIN_IDENTIFY) ? WAIT_WORSTCASE : WAIT_PIDENTIFY) / 2;
312 timeout += jiffies;
313 do {
314 if (time_after(jiffies, timeout)) {
315 /* drive timed-out */
316 return 1;
317 }
318 /* give drive a breather */
319 msleep(50);
320 } while ((hwif->INB(hd_status)) & BUSY_STAT);
321
322 /* wait for IRQ and DRQ_STAT */
323 msleep(50);
324 if (OK_STAT((hwif->INB(IDE_STATUS_REG)), DRQ_STAT, BAD_R_STAT)) {
325 unsigned long flags;
326
327 /* local CPU only; some systems need this */
328 local_irq_save(flags);
329 /* drive returned ID */
330 do_identify(drive, cmd);
331 /* drive responded with ID */
332 rc = 0;
333 /* clear drive IRQ */
334 (void) hwif->INB(IDE_STATUS_REG);
335 local_irq_restore(flags);
336 } else {
337 /* drive refused ID */
338 rc = 2;
339 }
340 return rc;
341}
342
343/**
344 * try_to_identify - try to identify a drive
345 * @drive: drive to probe
346 * @cmd: command to use
347 *
348 * Issue the identify command and then do IRQ probing to
349 * complete the identification when needed by finding the
350 * IRQ the drive is attached to
351 */
352
353static int try_to_identify (ide_drive_t *drive, u8 cmd)
354{
355 ide_hwif_t *hwif = HWIF(drive);
356 int retval;
357 int autoprobe = 0;
358 unsigned long cookie = 0;
359
360 /*
361 * Disable device irq unless we need to
362 * probe for it. Otherwise we'll get spurious
363 * interrupts during the identify-phase that
364 * the irq handler isn't expecting.
365 */
366 if (IDE_CONTROL_REG) {
367 u8 ctl = drive->ctl | 2;
368 if (!hwif->irq) {
369 autoprobe = 1;
370 cookie = probe_irq_on();
371 /* enable device irq */
372 ctl &= ~2;
373 }
374 hwif->OUTB(ctl, IDE_CONTROL_REG);
375 }
376
377 retval = actual_try_to_identify(drive, cmd);
378
379 if (autoprobe) {
380 int irq;
381 /* mask device irq */
382 hwif->OUTB(drive->ctl|2, IDE_CONTROL_REG);
383 /* clear drive IRQ */
384 (void) hwif->INB(IDE_STATUS_REG);
385 udelay(5);
386 irq = probe_irq_off(cookie);
387 if (!hwif->irq) {
388 if (irq > 0) {
389 hwif->irq = irq;
390 } else {
391 /* Mmmm.. multiple IRQs..
392 * don't know which was ours
393 */
394 printk("%s: IRQ probe failed (0x%lx)\n",
395 drive->name, cookie);
396 }
397 }
398 }
399 return retval;
400}
401
402
403/**
404 * do_probe - probe an IDE device
405 * @drive: drive to probe
406 * @cmd: command to use
407 *
408 * do_probe() has the difficult job of finding a drive if it exists,
409 * without getting hung up if it doesn't exist, without trampling on
410 * ethernet cards, and without leaving any IRQs dangling to haunt us later.
411 *
412 * If a drive is "known" to exist (from CMOS or kernel parameters),
413 * but does not respond right away, the probe will "hang in there"
414 * for the maximum wait time (about 30 seconds), otherwise it will
415 * exit much more quickly.
416 *
417 * Returns: 0 device was identified
418 * 1 device timed-out (no response to identify request)
419 * 2 device aborted the command (refused to identify itself)
420 * 3 bad status from device (possible for ATAPI drives)
421 * 4 probe was not attempted because failure was obvious
422 */
423
424static int do_probe (ide_drive_t *drive, u8 cmd)
425{
426 int rc;
427 ide_hwif_t *hwif = HWIF(drive);
428
429 if (drive->present) {
430 /* avoid waiting for inappropriate probes */
431 if ((drive->media != ide_disk) && (cmd == WIN_IDENTIFY))
432 return 4;
433 }
434#ifdef DEBUG
435 printk("probing for %s: present=%d, media=%d, probetype=%s\n",
436 drive->name, drive->present, drive->media,
437 (cmd == WIN_IDENTIFY) ? "ATA" : "ATAPI");
438#endif
439
440 /* needed for some systems
441 * (e.g. crw9624 as drive0 with disk as slave)
442 */
443 msleep(50);
444 SELECT_DRIVE(drive);
445 msleep(50);
446 if (hwif->INB(IDE_SELECT_REG) != drive->select.all && !drive->present) {
447 if (drive->select.b.unit != 0) {
448 /* exit with drive0 selected */
449 SELECT_DRIVE(&hwif->drives[0]);
450 /* allow BUSY_STAT to assert & clear */
451 msleep(50);
452 }
453 /* no i/f present: mmm.. this should be a 4 -ml */
454 return 3;
455 }
456
457 if (OK_STAT((hwif->INB(IDE_STATUS_REG)), READY_STAT, BUSY_STAT) ||
458 drive->present || cmd == WIN_PIDENTIFY) {
459 /* send cmd and wait */
460 if ((rc = try_to_identify(drive, cmd))) {
461 /* failed: try again */
462 rc = try_to_identify(drive,cmd);
463 }
464 if (hwif->INB(IDE_STATUS_REG) == (BUSY_STAT|READY_STAT))
465 return 4;
466
467 if ((rc == 1 && cmd == WIN_PIDENTIFY) &&
468 ((drive->autotune == IDE_TUNE_DEFAULT) ||
469 (drive->autotune == IDE_TUNE_AUTO))) {
470 unsigned long timeout;
471 printk("%s: no response (status = 0x%02x), "
472 "resetting drive\n", drive->name,
473 hwif->INB(IDE_STATUS_REG));
474 msleep(50);
475 hwif->OUTB(drive->select.all, IDE_SELECT_REG);
476 msleep(50);
477 hwif->OUTB(WIN_SRST, IDE_COMMAND_REG);
478 timeout = jiffies;
479 while (((hwif->INB(IDE_STATUS_REG)) & BUSY_STAT) &&
480 time_before(jiffies, timeout + WAIT_WORSTCASE))
481 msleep(50);
482 rc = try_to_identify(drive, cmd);
483 }
484 if (rc == 1)
485 printk("%s: no response (status = 0x%02x)\n",
486 drive->name, hwif->INB(IDE_STATUS_REG));
487 /* ensure drive irq is clear */
488 (void) hwif->INB(IDE_STATUS_REG);
489 } else {
490 /* not present or maybe ATAPI */
491 rc = 3;
492 }
493 if (drive->select.b.unit != 0) {
494 /* exit with drive0 selected */
495 SELECT_DRIVE(&hwif->drives[0]);
496 msleep(50);
497 /* ensure drive irq is clear */
498 (void) hwif->INB(IDE_STATUS_REG);
499 }
500 return rc;
501}
502
503/*
504 *
505 */
506static void enable_nest (ide_drive_t *drive)
507{
508 ide_hwif_t *hwif = HWIF(drive);
509 unsigned long timeout;
510
511 printk("%s: enabling %s -- ", hwif->name, drive->id->model);
512 SELECT_DRIVE(drive);
513 msleep(50);
514 hwif->OUTB(EXABYTE_ENABLE_NEST, IDE_COMMAND_REG);
515 timeout = jiffies + WAIT_WORSTCASE;
516 do {
517 if (time_after(jiffies, timeout)) {
518 printk("failed (timeout)\n");
519 return;
520 }
521 msleep(50);
522 } while ((hwif->INB(IDE_STATUS_REG)) & BUSY_STAT);
523
524 msleep(50);
525
526 if (!OK_STAT((hwif->INB(IDE_STATUS_REG)), 0, BAD_STAT)) {
527 printk("failed (status = 0x%02x)\n", hwif->INB(IDE_STATUS_REG));
528 } else {
529 printk("success\n");
530 }
531
532 /* if !(success||timed-out) */
533 if (do_probe(drive, WIN_IDENTIFY) >= 2) {
534 /* look for ATAPI device */
535 (void) do_probe(drive, WIN_PIDENTIFY);
536 }
537}
538
539/**
540 * probe_for_drives - upper level drive probe
541 * @drive: drive to probe for
542 *
543 * probe_for_drive() tests for existence of a given drive using do_probe()
544 * and presents things to the user as needed.
545 *
546 * Returns: 0 no device was found
547 * 1 device was found (note: drive->present might
548 * still be 0)
549 */
550
551static inline u8 probe_for_drive (ide_drive_t *drive)
552{
553 /*
554 * In order to keep things simple we have an id
555 * block for all drives at all times. If the device
556 * is pre ATA or refuses ATA/ATAPI identify we
557 * will add faked data to this.
558 *
559 * Also note that 0 everywhere means "can't do X"
560 */
561
Deepak Saxenaf5e3c2f2005-11-07 01:01:25 -0800562 drive->id = kzalloc(SECTOR_WORDS *4, GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700563 drive->id_read = 0;
564 if(drive->id == NULL)
565 {
566 printk(KERN_ERR "ide: out of memory for id data.\n");
567 return 0;
568 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700569 strcpy(drive->id->model, "UNKNOWN");
570
571 /* skip probing? */
572 if (!drive->noprobe)
573 {
574 /* if !(success||timed-out) */
575 if (do_probe(drive, WIN_IDENTIFY) >= 2) {
576 /* look for ATAPI device */
577 (void) do_probe(drive, WIN_PIDENTIFY);
578 }
579 if (strstr(drive->id->model, "E X A B Y T E N E S T"))
580 enable_nest(drive);
581 if (!drive->present)
582 /* drive not found */
583 return 0;
584
585 /* identification failed? */
586 if (!drive->id_read) {
587 if (drive->media == ide_disk) {
588 printk(KERN_INFO "%s: non-IDE drive, CHS=%d/%d/%d\n",
589 drive->name, drive->cyl,
590 drive->head, drive->sect);
591 } else if (drive->media == ide_cdrom) {
592 printk(KERN_INFO "%s: ATAPI cdrom (?)\n", drive->name);
593 } else {
594 /* nuke it */
595 printk(KERN_WARNING "%s: Unknown device on bus refused identification. Ignoring.\n", drive->name);
596 drive->present = 0;
597 }
598 }
599 /* drive was found */
600 }
601 if(!drive->present)
602 return 0;
603 /* The drive wasn't being helpful. Add generic info only */
604 if (drive->id_read == 0) {
605 generic_id(drive);
606 return 1;
607 }
608
609 if (drive->media == ide_disk) {
610 ide_disk_init_chs(drive);
611 ide_disk_init_mult_count(drive);
612 }
613
614 return drive->present;
615}
616
617static void hwif_release_dev (struct device *dev)
618{
619 ide_hwif_t *hwif = container_of(dev, ide_hwif_t, gendev);
620
Aleksey Makarovf36d4022006-01-09 15:59:27 -0800621 complete(&hwif->gendev_rel_comp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700622}
623
624static void hwif_register (ide_hwif_t *hwif)
625{
Randy Dunlap349ae232006-10-03 01:14:23 -0700626 int ret;
627
Linus Torvalds1da177e2005-04-16 15:20:36 -0700628 /* register with global device tree */
629 strlcpy(hwif->gendev.bus_id,hwif->name,BUS_ID_SIZE);
630 hwif->gendev.driver_data = hwif;
631 if (hwif->gendev.parent == NULL) {
632 if (hwif->pci_dev)
633 hwif->gendev.parent = &hwif->pci_dev->dev;
634 else
635 /* Would like to do = &device_legacy */
636 hwif->gendev.parent = NULL;
637 }
638 hwif->gendev.release = hwif_release_dev;
Randy Dunlap349ae232006-10-03 01:14:23 -0700639 ret = device_register(&hwif->gendev);
640 if (ret < 0)
641 printk(KERN_WARNING "IDE: %s: device_register error: %d\n",
642 __FUNCTION__, ret);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700643}
644
645static int wait_hwif_ready(ide_hwif_t *hwif)
646{
647 int rc;
648
649 printk(KERN_DEBUG "Probing IDE interface %s...\n", hwif->name);
650
651 /* Let HW settle down a bit from whatever init state we
652 * come from */
653 mdelay(2);
654
655 /* Wait for BSY bit to go away, spec timeout is 30 seconds,
656 * I know of at least one disk who takes 31 seconds, I use 35
657 * here to be safe
658 */
659 rc = ide_wait_not_busy(hwif, 35000);
660 if (rc)
661 return rc;
662
663 /* Now make sure both master & slave are ready */
664 SELECT_DRIVE(&hwif->drives[0]);
665 hwif->OUTB(8, hwif->io_ports[IDE_CONTROL_OFFSET]);
666 mdelay(2);
Marcello Maggioni284e4232005-05-26 15:47:35 +0200667 rc = ide_wait_not_busy(hwif, 35000);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700668 if (rc)
669 return rc;
670 SELECT_DRIVE(&hwif->drives[1]);
671 hwif->OUTB(8, hwif->io_ports[IDE_CONTROL_OFFSET]);
672 mdelay(2);
Marcello Maggioni284e4232005-05-26 15:47:35 +0200673 rc = ide_wait_not_busy(hwif, 35000);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700674
675 /* Exit function with master reselected (let's be sane) */
676 SELECT_DRIVE(&hwif->drives[0]);
677
678 return rc;
679}
680
681/**
682 * ide_undecoded_slave - look for bad CF adapters
683 * @hwif: interface
684 *
685 * Analyse the drives on the interface and attempt to decide if we
686 * have the same drive viewed twice. This occurs with crap CF adapters
687 * and PCMCIA sometimes.
688 */
689
690void ide_undecoded_slave(ide_hwif_t *hwif)
691{
692 ide_drive_t *drive0 = &hwif->drives[0];
693 ide_drive_t *drive1 = &hwif->drives[1];
694
695 if (drive0->present == 0 || drive1->present == 0)
696 return;
697
698 /* If the models don't match they are not the same product */
699 if (strcmp(drive0->id->model, drive1->id->model))
700 return;
701
702 /* Serial numbers do not match */
703 if (strncmp(drive0->id->serial_no, drive1->id->serial_no, 20))
704 return;
705
706 /* No serial number, thankfully very rare for CF */
707 if (drive0->id->serial_no[0] == 0)
708 return;
709
710 /* Appears to be an IDE flash adapter with decode bugs */
711 printk(KERN_WARNING "ide-probe: ignoring undecoded slave\n");
712
713 drive1->present = 0;
714}
715
716EXPORT_SYMBOL_GPL(ide_undecoded_slave);
717
718/*
719 * This routine only knows how to look for drive units 0 and 1
720 * on an interface, so any setting of MAX_DRIVES > 2 won't work here.
721 */
722static void probe_hwif(ide_hwif_t *hwif)
723{
724 unsigned int unit;
725 unsigned long flags;
726 unsigned int irqd;
727
728 if (hwif->noprobe)
729 return;
730
731 if ((hwif->chipset != ide_4drives || !hwif->mate || !hwif->mate->present) &&
732 (ide_hwif_request_regions(hwif))) {
733 u16 msgout = 0;
734 for (unit = 0; unit < MAX_DRIVES; ++unit) {
735 ide_drive_t *drive = &hwif->drives[unit];
736 if (drive->present) {
737 drive->present = 0;
738 printk(KERN_ERR "%s: ERROR, PORTS ALREADY IN USE\n",
739 drive->name);
740 msgout = 1;
741 }
742 }
743 if (!msgout)
744 printk(KERN_ERR "%s: ports already in use, skipping probe\n",
745 hwif->name);
746 return;
747 }
748
749 /*
750 * We must always disable IRQ, as probe_for_drive will assert IRQ, but
751 * we'll install our IRQ driver much later...
752 */
753 irqd = hwif->irq;
754 if (irqd)
755 disable_irq(hwif->irq);
756
757 local_irq_set(flags);
758
759 /* This is needed on some PPCs and a bunch of BIOS-less embedded
760 * platforms. Typical cases are:
761 *
762 * - The firmware hard reset the disk before booting the kernel,
763 * the drive is still doing it's poweron-reset sequence, that
764 * can take up to 30 seconds
765 * - The firmware does nothing (or no firmware), the device is
766 * still in POST state (same as above actually).
767 * - Some CD/DVD/Writer combo drives tend to drive the bus during
768 * their reset sequence even when they are non-selected slave
769 * devices, thus preventing discovery of the main HD
770 *
771 * Doing this wait-for-busy should not harm any existing configuration
772 * (at least things won't be worse than what current code does, that
773 * is blindly go & talk to the drive) and fix some issues like the
774 * above.
775 *
776 * BenH.
777 */
778 if (wait_hwif_ready(hwif) == -EBUSY)
779 printk(KERN_DEBUG "%s: Wait for ready failed before probe !\n", hwif->name);
780
781 /*
782 * Second drive should only exist if first drive was found,
783 * but a lot of cdrom drives are configured as single slaves.
784 */
785 for (unit = 0; unit < MAX_DRIVES; ++unit) {
786 ide_drive_t *drive = &hwif->drives[unit];
787 drive->dn = (hwif->channel ? 2 : 0) + unit;
788 (void) probe_for_drive(drive);
789 if (drive->present && !hwif->present) {
790 hwif->present = 1;
791 if (hwif->chipset != ide_4drives ||
792 !hwif->mate ||
793 !hwif->mate->present) {
794 hwif_register(hwif);
795 }
796 }
797 }
798 if (hwif->io_ports[IDE_CONTROL_OFFSET] && hwif->reset) {
799 unsigned long timeout = jiffies + WAIT_WORSTCASE;
800 u8 stat;
801
802 printk(KERN_WARNING "%s: reset\n", hwif->name);
803 hwif->OUTB(12, hwif->io_ports[IDE_CONTROL_OFFSET]);
804 udelay(10);
805 hwif->OUTB(8, hwif->io_ports[IDE_CONTROL_OFFSET]);
806 do {
807 msleep(50);
808 stat = hwif->INB(hwif->io_ports[IDE_STATUS_OFFSET]);
809 } while ((stat & BUSY_STAT) && time_after(timeout, jiffies));
810
811 }
812 local_irq_restore(flags);
813 /*
814 * Use cached IRQ number. It might be (and is...) changed by probe
815 * code above
816 */
817 if (irqd)
818 enable_irq(irqd);
819
820 if (!hwif->present) {
821 ide_hwif_release_regions(hwif);
822 return;
823 }
824
825 for (unit = 0; unit < MAX_DRIVES; ++unit) {
826 ide_drive_t *drive = &hwif->drives[unit];
827
828 if (drive->present) {
829 if (hwif->tuneproc != NULL &&
830 drive->autotune == IDE_TUNE_AUTO)
831 /* auto-tune PIO mode */
832 hwif->tuneproc(drive, 255);
833
834 if (drive->autotune != IDE_TUNE_DEFAULT &&
835 drive->autotune != IDE_TUNE_AUTO)
836 continue;
837
838 drive->nice1 = 1;
839
840 /*
841 * MAJOR HACK BARF :-/
842 *
843 * FIXME: chipsets own this cruft!
844 */
845 /*
846 * Move here to prevent module loading clashing.
847 */
848 // drive->autodma = hwif->autodma;
849 if (hwif->ide_dma_check) {
850 /*
851 * Force DMAing for the beginning of the check.
852 * Some chipsets appear to do interesting
853 * things, if not checked and cleared.
854 * PARANOIA!!!
855 */
856 hwif->ide_dma_off_quietly(drive);
857#ifdef CONFIG_IDEDMA_ONLYDISK
858 if (drive->media == ide_disk)
859#endif
860 hwif->ide_dma_check(drive);
861 }
862 }
863 }
Kumar Gala208a08f2006-03-24 03:18:21 -0800864
865 for (unit = 0; unit < MAX_DRIVES; ++unit) {
866 ide_drive_t *drive = &hwif->drives[unit];
867
868 if (hwif->no_io_32bit)
869 drive->no_io_32bit = 1;
870 else
871 drive->no_io_32bit = drive->id->dword_io ? 1 : 0;
872 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700873}
874
875static int hwif_init(ide_hwif_t *hwif);
876
877int probe_hwif_init_with_fixup(ide_hwif_t *hwif, void (*fixup)(ide_hwif_t *hwif))
878{
879 probe_hwif(hwif);
880
881 if (fixup)
882 fixup(hwif);
883
884 if (!hwif_init(hwif)) {
885 printk(KERN_INFO "%s: failed to initialize IDE interface\n",
886 hwif->name);
887 return -1;
888 }
889
890 if (hwif->present) {
891 u16 unit = 0;
Randy Dunlap349ae232006-10-03 01:14:23 -0700892 int ret;
893
Linus Torvalds1da177e2005-04-16 15:20:36 -0700894 for (unit = 0; unit < MAX_DRIVES; ++unit) {
895 ide_drive_t *drive = &hwif->drives[unit];
896 /* For now don't attach absent drives, we may
897 want them on default or a new "empty" class
898 for hotplug reprobing ? */
899 if (drive->present) {
Randy Dunlap349ae232006-10-03 01:14:23 -0700900 ret = device_register(&drive->gendev);
901 if (ret < 0)
902 printk(KERN_WARNING "IDE: %s: "
903 "device_register error: %d\n",
904 __FUNCTION__, ret);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700905 }
906 }
907 }
908 return 0;
909}
910
911int probe_hwif_init(ide_hwif_t *hwif)
912{
913 return probe_hwif_init_with_fixup(hwif, NULL);
914}
915
916EXPORT_SYMBOL(probe_hwif_init);
917
918#if MAX_HWIFS > 1
919/*
920 * save_match() is used to simplify logic in init_irq() below.
921 *
922 * A loophole here is that we may not know about a particular
923 * hwif's irq until after that hwif is actually probed/initialized..
924 * This could be a problem for the case where an hwif is on a
925 * dual interface that requires serialization (eg. cmd640) and another
926 * hwif using one of the same irqs is initialized beforehand.
927 *
928 * This routine detects and reports such situations, but does not fix them.
929 */
930static void save_match(ide_hwif_t *hwif, ide_hwif_t *new, ide_hwif_t **match)
931{
932 ide_hwif_t *m = *match;
933
934 if (m && m->hwgroup && m->hwgroup != new->hwgroup) {
935 if (!new->hwgroup)
936 return;
937 printk("%s: potential irq problem with %s and %s\n",
938 hwif->name, new->name, m->name);
939 }
940 if (!m || m->irq != hwif->irq) /* don't undo a prior perfect match */
941 *match = new;
942}
943#endif /* MAX_HWIFS > 1 */
944
945/*
946 * init request queue
947 */
948static int ide_init_queue(ide_drive_t *drive)
949{
950 request_queue_t *q;
951 ide_hwif_t *hwif = HWIF(drive);
952 int max_sectors = 256;
953 int max_sg_entries = PRD_ENTRIES;
954
955 /*
956 * Our default set up assumes the normal IDE case,
957 * that is 64K segmenting, standard PRD setup
958 * and LBA28. Some drivers then impose their own
959 * limits and LBA48 we could raise it but as yet
960 * do not.
961 */
Christoph Lameter19460892005-06-23 00:08:19 -0700962
Ravikiran G Thirumalai556e58f2005-08-04 12:53:26 -0700963 q = blk_init_queue_node(do_ide_request, &ide_lock, hwif_to_node(hwif));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700964 if (!q)
965 return 1;
966
967 q->queuedata = drive;
968 blk_queue_segment_boundary(q, 0xffff);
969
970 if (!hwif->rqsize) {
971 if (hwif->no_lba48 || hwif->no_lba48_dma)
972 hwif->rqsize = 256;
973 else
974 hwif->rqsize = 65536;
975 }
976 if (hwif->rqsize < max_sectors)
977 max_sectors = hwif->rqsize;
978 blk_queue_max_sectors(q, max_sectors);
979
980#ifdef CONFIG_PCI
981 /* When we have an IOMMU, we may have a problem where pci_map_sg()
982 * creates segments that don't completely match our boundary
983 * requirements and thus need to be broken up again. Because it
984 * doesn't align properly either, we may actually have to break up
985 * to more segments than what was we got in the first place, a max
986 * worst case is twice as many.
987 * This will be fixed once we teach pci_map_sg() about our boundary
988 * requirements, hopefully soon. *FIXME*
989 */
990 if (!PCI_DMA_BUS_IS_PHYS)
991 max_sg_entries >>= 1;
992#endif /* CONFIG_PCI */
993
994 blk_queue_max_hw_segments(q, max_sg_entries);
995 blk_queue_max_phys_segments(q, max_sg_entries);
996
997 /* assign drive queue */
998 drive->queue = q;
999
1000 /* needs drive->queue to be set */
1001 ide_toggle_bounce(drive, 1);
1002
1003 /* enable led activity for disk drives only */
1004 if (drive->media == ide_disk && hwif->led_act)
1005 blk_queue_activity_fn(q, hwif->led_act, drive);
1006
1007 return 0;
1008}
1009
1010/*
1011 * This routine sets up the irq for an ide interface, and creates a new
1012 * hwgroup for the irq/hwif if none was previously assigned.
1013 *
1014 * Much of the code is for correctly detecting/handling irq sharing
1015 * and irq serialization situations. This is somewhat complex because
1016 * it handles static as well as dynamic (PCMCIA) IDE interfaces.
1017 *
Thomas Gleixner362537b2006-07-01 19:29:34 -07001018 * The IRQF_DISABLED in sa_flags means ide_intr() is always entered with
Linus Torvalds1da177e2005-04-16 15:20:36 -07001019 * interrupts completely disabled. This can be bad for interrupt latency,
1020 * but anything else has led to problems on some machines. We re-enable
1021 * interrupts as much as we can safely do in most places.
1022 */
1023static int init_irq (ide_hwif_t *hwif)
1024{
1025 unsigned int index;
1026 ide_hwgroup_t *hwgroup;
1027 ide_hwif_t *match = NULL;
1028
1029
1030 BUG_ON(in_interrupt());
1031 BUG_ON(irqs_disabled());
Ravikiran G Thirumalai556e58f2005-08-04 12:53:26 -07001032 BUG_ON(hwif == NULL);
1033
Linus Torvalds1da177e2005-04-16 15:20:36 -07001034 down(&ide_cfg_sem);
1035 hwif->hwgroup = NULL;
1036#if MAX_HWIFS > 1
1037 /*
1038 * Group up with any other hwifs that share our irq(s).
1039 */
1040 for (index = 0; index < MAX_HWIFS; index++) {
1041 ide_hwif_t *h = &ide_hwifs[index];
1042 if (h->hwgroup) { /* scan only initialized hwif's */
1043 if (hwif->irq == h->irq) {
1044 hwif->sharing_irq = h->sharing_irq = 1;
1045 if (hwif->chipset != ide_pci ||
1046 h->chipset != ide_pci) {
1047 save_match(hwif, h, &match);
1048 }
1049 }
1050 if (hwif->serialized) {
1051 if (hwif->mate && hwif->mate->irq == h->irq)
1052 save_match(hwif, h, &match);
1053 }
1054 if (h->serialized) {
1055 if (h->mate && hwif->irq == h->mate->irq)
1056 save_match(hwif, h, &match);
1057 }
1058 }
1059 }
1060#endif /* MAX_HWIFS > 1 */
1061 /*
1062 * If we are still without a hwgroup, then form a new one
1063 */
1064 if (match) {
1065 hwgroup = match->hwgroup;
1066 hwif->hwgroup = hwgroup;
1067 /*
1068 * Link us into the hwgroup.
1069 * This must be done early, do ensure that unexpected_intr
1070 * can find the hwif and prevent irq storms.
1071 * No drives are attached to the new hwif, choose_drive
1072 * can't do anything stupid (yet).
1073 * Add ourself as the 2nd entry to the hwgroup->hwif
1074 * linked list, the first entry is the hwif that owns
1075 * hwgroup->handler - do not change that.
1076 */
1077 spin_lock_irq(&ide_lock);
1078 hwif->next = hwgroup->hwif->next;
1079 hwgroup->hwif->next = hwif;
1080 spin_unlock_irq(&ide_lock);
1081 } else {
Christoph Lameter19460892005-06-23 00:08:19 -07001082 hwgroup = kmalloc_node(sizeof(ide_hwgroup_t), GFP_KERNEL,
Ravikiran G Thirumalai556e58f2005-08-04 12:53:26 -07001083 hwif_to_node(hwif->drives[0].hwif));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001084 if (!hwgroup)
1085 goto out_up;
1086
1087 hwif->hwgroup = hwgroup;
1088
1089 memset(hwgroup, 0, sizeof(ide_hwgroup_t));
1090 hwgroup->hwif = hwif->next = hwif;
1091 hwgroup->rq = NULL;
1092 hwgroup->handler = NULL;
1093 hwgroup->drive = NULL;
1094 hwgroup->busy = 0;
1095 init_timer(&hwgroup->timer);
1096 hwgroup->timer.function = &ide_timer_expiry;
1097 hwgroup->timer.data = (unsigned long) hwgroup;
1098 }
1099
1100 /*
1101 * Allocate the irq, if not already obtained for another hwif
1102 */
1103 if (!match || match->irq != hwif->irq) {
Thomas Gleixner362537b2006-07-01 19:29:34 -07001104 int sa = IRQF_DISABLED;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001105#if defined(__mc68000__) || defined(CONFIG_APUS)
Thomas Gleixner362537b2006-07-01 19:29:34 -07001106 sa = IRQF_SHARED;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001107#endif /* __mc68000__ || CONFIG_APUS */
1108
1109 if (IDE_CHIPSET_IS_PCI(hwif->chipset)) {
Thomas Gleixner362537b2006-07-01 19:29:34 -07001110 sa = IRQF_SHARED;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001111#ifndef CONFIG_IDEPCI_SHARE_IRQ
Thomas Gleixner362537b2006-07-01 19:29:34 -07001112 sa |= IRQF_DISABLED;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001113#endif /* CONFIG_IDEPCI_SHARE_IRQ */
1114 }
1115
1116 if (hwif->io_ports[IDE_CONTROL_OFFSET])
1117 /* clear nIEN */
1118 hwif->OUTB(0x08, hwif->io_ports[IDE_CONTROL_OFFSET]);
1119
1120 if (request_irq(hwif->irq,&ide_intr,sa,hwif->name,hwgroup))
1121 goto out_unlink;
1122 }
1123
1124 /*
1125 * For any present drive:
1126 * - allocate the block device queue
1127 * - link drive into the hwgroup
1128 */
1129 for (index = 0; index < MAX_DRIVES; ++index) {
1130 ide_drive_t *drive = &hwif->drives[index];
1131 if (!drive->present)
1132 continue;
1133 if (ide_init_queue(drive)) {
1134 printk(KERN_ERR "ide: failed to init %s\n",drive->name);
1135 continue;
1136 }
1137 spin_lock_irq(&ide_lock);
1138 if (!hwgroup->drive) {
1139 /* first drive for hwgroup. */
1140 drive->next = drive;
1141 hwgroup->drive = drive;
1142 hwgroup->hwif = HWIF(hwgroup->drive);
1143 } else {
1144 drive->next = hwgroup->drive->next;
1145 hwgroup->drive->next = drive;
1146 }
1147 spin_unlock_irq(&ide_lock);
1148 }
1149
David S. Millerc6387a42006-06-20 01:21:29 -07001150#if !defined(__mc68000__) && !defined(CONFIG_APUS)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001151 printk("%s at 0x%03lx-0x%03lx,0x%03lx on irq %d", hwif->name,
1152 hwif->io_ports[IDE_DATA_OFFSET],
1153 hwif->io_ports[IDE_DATA_OFFSET]+7,
1154 hwif->io_ports[IDE_CONTROL_OFFSET], hwif->irq);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001155#else
1156 printk("%s at 0x%08lx on irq %d", hwif->name,
1157 hwif->io_ports[IDE_DATA_OFFSET], hwif->irq);
1158#endif /* __mc68000__ && CONFIG_APUS */
1159 if (match)
1160 printk(" (%sed with %s)",
1161 hwif->sharing_irq ? "shar" : "serializ", match->name);
1162 printk("\n");
1163 up(&ide_cfg_sem);
1164 return 0;
1165out_unlink:
1166 spin_lock_irq(&ide_lock);
1167 if (hwif->next == hwif) {
1168 BUG_ON(match);
1169 BUG_ON(hwgroup->hwif != hwif);
1170 kfree(hwgroup);
1171 } else {
1172 ide_hwif_t *g;
1173 g = hwgroup->hwif;
1174 while (g->next != hwif)
1175 g = g->next;
1176 g->next = hwif->next;
1177 if (hwgroup->hwif == hwif) {
1178 /* Impossible. */
1179 printk(KERN_ERR "Duh. Uninitialized hwif listed as active hwif.\n");
1180 hwgroup->hwif = g;
1181 }
1182 BUG_ON(hwgroup->hwif == hwif);
1183 }
1184 spin_unlock_irq(&ide_lock);
1185out_up:
1186 up(&ide_cfg_sem);
1187 return 1;
1188}
1189
1190static int ata_lock(dev_t dev, void *data)
1191{
1192 /* FIXME: we want to pin hwif down */
1193 return 0;
1194}
1195
1196static struct kobject *ata_probe(dev_t dev, int *part, void *data)
1197{
1198 ide_hwif_t *hwif = data;
1199 int unit = *part >> PARTN_BITS;
1200 ide_drive_t *drive = &hwif->drives[unit];
1201 if (!drive->present)
1202 return NULL;
1203
1204 if (drive->media == ide_disk)
1205 request_module("ide-disk");
1206 if (drive->scsi)
1207 request_module("ide-scsi");
1208 if (drive->media == ide_cdrom || drive->media == ide_optical)
1209 request_module("ide-cd");
1210 if (drive->media == ide_tape)
1211 request_module("ide-tape");
1212 if (drive->media == ide_floppy)
1213 request_module("ide-floppy");
1214
1215 return NULL;
1216}
1217
1218static struct kobject *exact_match(dev_t dev, int *part, void *data)
1219{
1220 struct gendisk *p = data;
1221 *part &= (1 << PARTN_BITS) - 1;
1222 return &p->kobj;
1223}
1224
1225static int exact_lock(dev_t dev, void *data)
1226{
1227 struct gendisk *p = data;
1228
1229 if (!get_disk(p))
1230 return -1;
1231 return 0;
1232}
1233
1234void ide_register_region(struct gendisk *disk)
1235{
1236 blk_register_region(MKDEV(disk->major, disk->first_minor),
1237 disk->minors, NULL, exact_match, exact_lock, disk);
1238}
1239
1240EXPORT_SYMBOL_GPL(ide_register_region);
1241
1242void ide_unregister_region(struct gendisk *disk)
1243{
1244 blk_unregister_region(MKDEV(disk->major, disk->first_minor),
1245 disk->minors);
1246}
1247
1248EXPORT_SYMBOL_GPL(ide_unregister_region);
1249
1250void ide_init_disk(struct gendisk *disk, ide_drive_t *drive)
1251{
1252 ide_hwif_t *hwif = drive->hwif;
1253 unsigned int unit = (drive->select.all >> 4) & 1;
1254
1255 disk->major = hwif->major;
1256 disk->first_minor = unit << PARTN_BITS;
1257 sprintf(disk->disk_name, "hd%c", 'a' + hwif->index * MAX_DRIVES + unit);
1258 disk->queue = drive->queue;
1259}
1260
1261EXPORT_SYMBOL_GPL(ide_init_disk);
1262
Bartlomiej Zolnierkiewicz8604aff2005-05-26 14:55:34 +02001263static void ide_remove_drive_from_hwgroup(ide_drive_t *drive)
1264{
1265 ide_hwgroup_t *hwgroup = drive->hwif->hwgroup;
1266
1267 if (drive == drive->next) {
1268 /* special case: last drive from hwgroup. */
1269 BUG_ON(hwgroup->drive != drive);
1270 hwgroup->drive = NULL;
1271 } else {
1272 ide_drive_t *walk;
1273
1274 walk = hwgroup->drive;
1275 while (walk->next != drive)
1276 walk = walk->next;
1277 walk->next = drive->next;
1278 if (hwgroup->drive == drive) {
1279 hwgroup->drive = drive->next;
1280 hwgroup->hwif = hwgroup->drive->hwif;
1281 }
1282 }
1283 BUG_ON(hwgroup->drive == drive);
1284}
1285
Linus Torvalds1da177e2005-04-16 15:20:36 -07001286static void drive_release_dev (struct device *dev)
1287{
1288 ide_drive_t *drive = container_of(dev, ide_drive_t, gendev);
1289
Bartlomiej Zolnierkiewicz8604aff2005-05-26 14:55:34 +02001290 spin_lock_irq(&ide_lock);
Bartlomiej Zolnierkiewicz8604aff2005-05-26 14:55:34 +02001291 ide_remove_drive_from_hwgroup(drive);
Jesper Juhl6044ec82005-11-07 01:01:32 -08001292 kfree(drive->id);
1293 drive->id = NULL;
Bartlomiej Zolnierkiewicz8604aff2005-05-26 14:55:34 +02001294 drive->present = 0;
1295 /* Messed up locking ... */
1296 spin_unlock_irq(&ide_lock);
1297 blk_cleanup_queue(drive->queue);
1298 spin_lock_irq(&ide_lock);
1299 drive->queue = NULL;
1300 spin_unlock_irq(&ide_lock);
1301
Aleksey Makarovf36d4022006-01-09 15:59:27 -08001302 complete(&drive->gendev_rel_comp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001303}
1304
1305/*
1306 * init_gendisk() (as opposed to ide_geninit) is called for each major device,
1307 * after probing for drives, to allocate partition tables and other data
1308 * structures needed for the routines in genhd.c. ide_geninit() gets called
1309 * somewhat later, during the partition check.
1310 */
1311static void init_gendisk (ide_hwif_t *hwif)
1312{
1313 unsigned int unit;
1314
1315 for (unit = 0; unit < MAX_DRIVES; ++unit) {
1316 ide_drive_t * drive = &hwif->drives[unit];
1317 ide_add_generic_settings(drive);
1318 snprintf(drive->gendev.bus_id,BUS_ID_SIZE,"%u.%u",
1319 hwif->index,unit);
1320 drive->gendev.parent = &hwif->gendev;
1321 drive->gendev.bus = &ide_bus_type;
1322 drive->gendev.driver_data = drive;
1323 drive->gendev.release = drive_release_dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001324 }
1325 blk_register_region(MKDEV(hwif->major, 0), MAX_DRIVES << PARTN_BITS,
1326 THIS_MODULE, ata_probe, ata_lock, hwif);
1327}
1328
1329static int hwif_init(ide_hwif_t *hwif)
1330{
1331 int old_irq;
1332
1333 /* Return success if no device is connected */
1334 if (!hwif->present)
1335 return 1;
1336
1337 if (!hwif->irq) {
1338 if (!(hwif->irq = ide_default_irq(hwif->io_ports[IDE_DATA_OFFSET])))
1339 {
1340 printk("%s: DISABLED, NO IRQ\n", hwif->name);
1341 return (hwif->present = 0);
1342 }
1343 }
1344#ifdef CONFIG_BLK_DEV_HD
1345 if (hwif->irq == HD_IRQ && hwif->io_ports[IDE_DATA_OFFSET] != HD_DATA) {
1346 printk("%s: CANNOT SHARE IRQ WITH OLD "
1347 "HARDDISK DRIVER (hd.c)\n", hwif->name);
1348 return (hwif->present = 0);
1349 }
1350#endif /* CONFIG_BLK_DEV_HD */
1351
1352 /* we set it back to 1 if all is ok below */
1353 hwif->present = 0;
1354
1355 if (register_blkdev(hwif->major, hwif->name))
1356 return 0;
1357
1358 if (!hwif->sg_max_nents)
1359 hwif->sg_max_nents = PRD_ENTRIES;
1360
1361 hwif->sg_table = kmalloc(sizeof(struct scatterlist)*hwif->sg_max_nents,
1362 GFP_KERNEL);
1363 if (!hwif->sg_table) {
1364 printk(KERN_ERR "%s: unable to allocate SG table.\n", hwif->name);
1365 goto out;
1366 }
1367
1368 if (init_irq(hwif) == 0)
1369 goto done;
1370
1371 old_irq = hwif->irq;
1372 /*
1373 * It failed to initialise. Find the default IRQ for
1374 * this port and try that.
1375 */
1376 if (!(hwif->irq = ide_default_irq(hwif->io_ports[IDE_DATA_OFFSET]))) {
1377 printk("%s: Disabled unable to get IRQ %d.\n",
1378 hwif->name, old_irq);
1379 goto out;
1380 }
1381 if (init_irq(hwif)) {
1382 printk("%s: probed IRQ %d and default IRQ %d failed.\n",
1383 hwif->name, old_irq, hwif->irq);
1384 goto out;
1385 }
1386 printk("%s: probed IRQ %d failed, using default.\n",
1387 hwif->name, hwif->irq);
1388
1389done:
1390 init_gendisk(hwif);
1391 hwif->present = 1; /* success */
1392 return 1;
1393
1394out:
1395 unregister_blkdev(hwif->major, hwif->name);
1396 return 0;
1397}
1398
1399int ideprobe_init (void)
1400{
1401 unsigned int index;
1402 int probe[MAX_HWIFS];
1403
1404 memset(probe, 0, MAX_HWIFS * sizeof(int));
1405 for (index = 0; index < MAX_HWIFS; ++index)
1406 probe[index] = !ide_hwifs[index].present;
1407
1408 for (index = 0; index < MAX_HWIFS; ++index)
1409 if (probe[index])
1410 probe_hwif(&ide_hwifs[index]);
1411 for (index = 0; index < MAX_HWIFS; ++index)
1412 if (probe[index])
1413 hwif_init(&ide_hwifs[index]);
1414 for (index = 0; index < MAX_HWIFS; ++index) {
1415 if (probe[index]) {
1416 ide_hwif_t *hwif = &ide_hwifs[index];
1417 int unit;
1418 if (!hwif->present)
1419 continue;
1420 if (hwif->chipset == ide_unknown || hwif->chipset == ide_forced)
1421 hwif->chipset = ide_generic;
1422 for (unit = 0; unit < MAX_DRIVES; ++unit)
Randy Dunlap349ae232006-10-03 01:14:23 -07001423 if (hwif->drives[unit].present) {
1424 int ret = device_register(
1425 &hwif->drives[unit].gendev);
1426 if (ret < 0)
1427 printk(KERN_WARNING "IDE: %s: "
1428 "device_register error: %d\n",
1429 __FUNCTION__, ret);
1430 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001431 }
1432 }
1433 return 0;
1434}
1435
1436EXPORT_SYMBOL_GPL(ideprobe_init);