ia64/linux-2.6.18-xen.hg

view drivers/ide/ide-probe.c @ 893:f994bfe9b93b

linux/blktap2: reduce TLB flush scope

c/s 885 added very coarse TLB flushing. Since these flushes always
follow single page updates, single page flushes (when available) are
sufficient.

Signed-off-by: Jan Beulich <jbeulich@novell.com>
author Keir Fraser <keir.fraser@citrix.com>
date Thu Jun 04 10:32:57 2009 +0100 (2009-06-04)
parents 831230e53067
children
line source
1 /*
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 */
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 */
34 #undef REALLY_SLOW_IO /* most systems can safely undef this */
36 #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>
53 #include <asm/byteorder.h>
54 #include <asm/irq.h>
55 #include <asm/uaccess.h>
56 #include <asm/io.h>
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 */
67 static 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 }
77 static void ide_disk_init_chs(ide_drive_t *drive)
78 {
79 struct hd_driveid *id = drive->id;
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 }
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 }
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 }
104 static void ide_disk_init_mult_count(ide_drive_t *drive)
105 {
106 struct hd_driveid *id = drive->id;
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 }
125 /**
126 * 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 */
135 static 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;
141 id = drive->id;
142 /* read 512 bytes of id info */
143 hwif->ata_input_data(drive, id, SECTOR_WORDS);
145 drive->id_read = 1;
146 local_irq_enable();
147 ide_fix_driveid(id);
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 */
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);
176 if (strstr(id->model, "E X A B Y T E N E S T"))
177 goto err_misc;
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;
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 }
237 /*
238 * Not an ATAPI device: looks like a "regular" hard disk
239 */
241 /*
242 * 0x848a = CompactFlash device
243 * These are *not* removable in Linux definition of the term
244 */
246 if ((id->config != 0x848a) && (id->config & (1<<7)))
247 drive->removable = 1;
249 drive->media = ide_disk;
250 printk("%s DISK drive\n", (id->config == 0x848a) ? "CFA" : "ATA" );
251 QUIRK_LIST(drive);
252 return;
254 err_misc:
255 kfree(id);
256 drive->present = 0;
257 return;
258 }
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 */
275 static 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;
283 /* take a deep breath */
284 msleep(50);
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;
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);
308 /* ask drive for ID */
309 hwif->OUTB(cmd, IDE_COMMAND_REG);
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);
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;
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 }
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 */
353 static 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;
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 }
377 retval = actual_try_to_identify(drive, cmd);
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 }
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 */
424 static int do_probe (ide_drive_t *drive, u8 cmd)
425 {
426 int rc;
427 ide_hwif_t *hwif = HWIF(drive);
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
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 }
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;
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 }
503 /*
504 *
505 */
506 static void enable_nest (ide_drive_t *drive)
507 {
508 ide_hwif_t *hwif = HWIF(drive);
509 unsigned long timeout;
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);
524 msleep(50);
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 }
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 }
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 */
551 static 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 */
562 drive->id = kzalloc(SECTOR_WORDS *4, GFP_KERNEL);
563 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 }
569 strcpy(drive->id->model, "UNKNOWN");
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;
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 }
609 if (drive->media == ide_disk) {
610 ide_disk_init_chs(drive);
611 ide_disk_init_mult_count(drive);
612 }
614 return drive->present;
615 }
617 static void hwif_release_dev (struct device *dev)
618 {
619 ide_hwif_t *hwif = container_of(dev, ide_hwif_t, gendev);
621 complete(&hwif->gendev_rel_comp);
622 }
624 static void hwif_register (ide_hwif_t *hwif)
625 {
626 /* register with global device tree */
627 strlcpy(hwif->gendev.bus_id,hwif->name,BUS_ID_SIZE);
628 hwif->gendev.driver_data = hwif;
629 if (hwif->gendev.parent == NULL) {
630 if (hwif->pci_dev)
631 hwif->gendev.parent = &hwif->pci_dev->dev;
632 else
633 /* Would like to do = &device_legacy */
634 hwif->gendev.parent = NULL;
635 }
636 hwif->gendev.release = hwif_release_dev;
637 device_register(&hwif->gendev);
638 }
640 static int wait_hwif_ready(ide_hwif_t *hwif)
641 {
642 int rc;
644 printk(KERN_DEBUG "Probing IDE interface %s...\n", hwif->name);
646 /* Let HW settle down a bit from whatever init state we
647 * come from */
648 mdelay(2);
650 /* Wait for BSY bit to go away, spec timeout is 30 seconds,
651 * I know of at least one disk who takes 31 seconds, I use 35
652 * here to be safe
653 */
654 rc = ide_wait_not_busy(hwif, 35000);
655 if (rc)
656 return rc;
658 /* Now make sure both master & slave are ready */
659 SELECT_DRIVE(&hwif->drives[0]);
660 hwif->OUTB(8, hwif->io_ports[IDE_CONTROL_OFFSET]);
661 mdelay(2);
662 rc = ide_wait_not_busy(hwif, 35000);
663 if (rc)
664 return rc;
665 SELECT_DRIVE(&hwif->drives[1]);
666 hwif->OUTB(8, hwif->io_ports[IDE_CONTROL_OFFSET]);
667 mdelay(2);
668 rc = ide_wait_not_busy(hwif, 35000);
670 /* Exit function with master reselected (let's be sane) */
671 SELECT_DRIVE(&hwif->drives[0]);
673 return rc;
674 }
676 /**
677 * ide_undecoded_slave - look for bad CF adapters
678 * @hwif: interface
679 *
680 * Analyse the drives on the interface and attempt to decide if we
681 * have the same drive viewed twice. This occurs with crap CF adapters
682 * and PCMCIA sometimes.
683 */
685 void ide_undecoded_slave(ide_hwif_t *hwif)
686 {
687 ide_drive_t *drive0 = &hwif->drives[0];
688 ide_drive_t *drive1 = &hwif->drives[1];
690 if (drive0->present == 0 || drive1->present == 0)
691 return;
693 /* If the models don't match they are not the same product */
694 if (strcmp(drive0->id->model, drive1->id->model))
695 return;
697 /* Serial numbers do not match */
698 if (strncmp(drive0->id->serial_no, drive1->id->serial_no, 20))
699 return;
701 /* No serial number, thankfully very rare for CF */
702 if (drive0->id->serial_no[0] == 0)
703 return;
705 /* Appears to be an IDE flash adapter with decode bugs */
706 printk(KERN_WARNING "ide-probe: ignoring undecoded slave\n");
708 drive1->present = 0;
709 }
711 EXPORT_SYMBOL_GPL(ide_undecoded_slave);
713 /*
714 * This routine only knows how to look for drive units 0 and 1
715 * on an interface, so any setting of MAX_DRIVES > 2 won't work here.
716 */
717 static void probe_hwif(ide_hwif_t *hwif)
718 {
719 unsigned int unit;
720 unsigned long flags;
721 unsigned int irqd;
723 if (hwif->noprobe)
724 return;
726 if ((hwif->chipset != ide_4drives || !hwif->mate || !hwif->mate->present) &&
727 (ide_hwif_request_regions(hwif))) {
728 u16 msgout = 0;
729 for (unit = 0; unit < MAX_DRIVES; ++unit) {
730 ide_drive_t *drive = &hwif->drives[unit];
731 if (drive->present) {
732 drive->present = 0;
733 printk(KERN_ERR "%s: ERROR, PORTS ALREADY IN USE\n",
734 drive->name);
735 msgout = 1;
736 }
737 }
738 if (!msgout)
739 printk(KERN_ERR "%s: ports already in use, skipping probe\n",
740 hwif->name);
741 return;
742 }
744 /*
745 * We must always disable IRQ, as probe_for_drive will assert IRQ, but
746 * we'll install our IRQ driver much later...
747 */
748 irqd = hwif->irq;
749 if (irqd)
750 disable_irq(hwif->irq);
752 local_irq_set(flags);
754 /* This is needed on some PPCs and a bunch of BIOS-less embedded
755 * platforms. Typical cases are:
756 *
757 * - The firmware hard reset the disk before booting the kernel,
758 * the drive is still doing it's poweron-reset sequence, that
759 * can take up to 30 seconds
760 * - The firmware does nothing (or no firmware), the device is
761 * still in POST state (same as above actually).
762 * - Some CD/DVD/Writer combo drives tend to drive the bus during
763 * their reset sequence even when they are non-selected slave
764 * devices, thus preventing discovery of the main HD
765 *
766 * Doing this wait-for-busy should not harm any existing configuration
767 * (at least things won't be worse than what current code does, that
768 * is blindly go & talk to the drive) and fix some issues like the
769 * above.
770 *
771 * BenH.
772 */
773 if (wait_hwif_ready(hwif) == -EBUSY)
774 printk(KERN_DEBUG "%s: Wait for ready failed before probe !\n", hwif->name);
776 /*
777 * Second drive should only exist if first drive was found,
778 * but a lot of cdrom drives are configured as single slaves.
779 */
780 for (unit = 0; unit < MAX_DRIVES; ++unit) {
781 ide_drive_t *drive = &hwif->drives[unit];
782 drive->dn = (hwif->channel ? 2 : 0) + unit;
783 (void) probe_for_drive(drive);
784 if (drive->present && !hwif->present) {
785 hwif->present = 1;
786 if (hwif->chipset != ide_4drives ||
787 !hwif->mate ||
788 !hwif->mate->present) {
789 hwif_register(hwif);
790 }
791 }
792 }
793 if (hwif->io_ports[IDE_CONTROL_OFFSET] && hwif->reset) {
794 unsigned long timeout = jiffies + WAIT_WORSTCASE;
795 u8 stat;
797 printk(KERN_WARNING "%s: reset\n", hwif->name);
798 hwif->OUTB(12, hwif->io_ports[IDE_CONTROL_OFFSET]);
799 udelay(10);
800 hwif->OUTB(8, hwif->io_ports[IDE_CONTROL_OFFSET]);
801 do {
802 msleep(50);
803 stat = hwif->INB(hwif->io_ports[IDE_STATUS_OFFSET]);
804 } while ((stat & BUSY_STAT) && time_after(timeout, jiffies));
806 }
807 local_irq_restore(flags);
808 /*
809 * Use cached IRQ number. It might be (and is...) changed by probe
810 * code above
811 */
812 if (irqd)
813 enable_irq(irqd);
815 if (!hwif->present) {
816 ide_hwif_release_regions(hwif);
817 return;
818 }
820 for (unit = 0; unit < MAX_DRIVES; ++unit) {
821 ide_drive_t *drive = &hwif->drives[unit];
823 if (drive->present) {
824 if (hwif->tuneproc != NULL &&
825 drive->autotune == IDE_TUNE_AUTO)
826 /* auto-tune PIO mode */
827 hwif->tuneproc(drive, 255);
829 if (drive->autotune != IDE_TUNE_DEFAULT &&
830 drive->autotune != IDE_TUNE_AUTO)
831 continue;
833 drive->nice1 = 1;
835 /*
836 * MAJOR HACK BARF :-/
837 *
838 * FIXME: chipsets own this cruft!
839 */
840 /*
841 * Move here to prevent module loading clashing.
842 */
843 // drive->autodma = hwif->autodma;
844 if (hwif->ide_dma_check) {
845 /*
846 * Force DMAing for the beginning of the check.
847 * Some chipsets appear to do interesting
848 * things, if not checked and cleared.
849 * PARANOIA!!!
850 */
851 hwif->ide_dma_off_quietly(drive);
852 #ifdef CONFIG_IDEDMA_ONLYDISK
853 if (drive->media == ide_disk)
854 #endif
855 hwif->ide_dma_check(drive);
856 }
857 }
858 }
860 for (unit = 0; unit < MAX_DRIVES; ++unit) {
861 ide_drive_t *drive = &hwif->drives[unit];
863 if (hwif->no_io_32bit)
864 drive->no_io_32bit = 1;
865 else
866 drive->no_io_32bit = drive->id->dword_io ? 1 : 0;
867 }
868 }
870 static int hwif_init(ide_hwif_t *hwif);
872 int probe_hwif_init_with_fixup(ide_hwif_t *hwif, void (*fixup)(ide_hwif_t *hwif))
873 {
874 probe_hwif(hwif);
876 if (fixup)
877 fixup(hwif);
879 if (!hwif_init(hwif)) {
880 printk(KERN_INFO "%s: failed to initialize IDE interface\n",
881 hwif->name);
882 return -1;
883 }
885 if (hwif->present) {
886 u16 unit = 0;
887 for (unit = 0; unit < MAX_DRIVES; ++unit) {
888 ide_drive_t *drive = &hwif->drives[unit];
889 /* For now don't attach absent drives, we may
890 want them on default or a new "empty" class
891 for hotplug reprobing ? */
892 if (drive->present) {
893 device_register(&drive->gendev);
894 }
895 }
896 }
897 return 0;
898 }
900 int probe_hwif_init(ide_hwif_t *hwif)
901 {
902 return probe_hwif_init_with_fixup(hwif, NULL);
903 }
905 EXPORT_SYMBOL(probe_hwif_init);
907 #if MAX_HWIFS > 1
908 /*
909 * save_match() is used to simplify logic in init_irq() below.
910 *
911 * A loophole here is that we may not know about a particular
912 * hwif's irq until after that hwif is actually probed/initialized..
913 * This could be a problem for the case where an hwif is on a
914 * dual interface that requires serialization (eg. cmd640) and another
915 * hwif using one of the same irqs is initialized beforehand.
916 *
917 * This routine detects and reports such situations, but does not fix them.
918 */
919 static void save_match(ide_hwif_t *hwif, ide_hwif_t *new, ide_hwif_t **match)
920 {
921 ide_hwif_t *m = *match;
923 if (m && m->hwgroup && m->hwgroup != new->hwgroup) {
924 if (!new->hwgroup)
925 return;
926 printk("%s: potential irq problem with %s and %s\n",
927 hwif->name, new->name, m->name);
928 }
929 if (!m || m->irq != hwif->irq) /* don't undo a prior perfect match */
930 *match = new;
931 }
932 #endif /* MAX_HWIFS > 1 */
934 /*
935 * init request queue
936 */
937 static int ide_init_queue(ide_drive_t *drive)
938 {
939 request_queue_t *q;
940 ide_hwif_t *hwif = HWIF(drive);
941 int max_sectors = 256;
942 int max_sg_entries = PRD_ENTRIES;
944 /*
945 * Our default set up assumes the normal IDE case,
946 * that is 64K segmenting, standard PRD setup
947 * and LBA28. Some drivers then impose their own
948 * limits and LBA48 we could raise it but as yet
949 * do not.
950 */
952 q = blk_init_queue_node(do_ide_request, &ide_lock, hwif_to_node(hwif));
953 if (!q)
954 return 1;
956 q->queuedata = drive;
957 blk_queue_segment_boundary(q, 0xffff);
959 if (!hwif->rqsize) {
960 if (hwif->no_lba48 || hwif->no_lba48_dma)
961 hwif->rqsize = 256;
962 else
963 hwif->rqsize = 65536;
964 }
965 if (hwif->rqsize < max_sectors)
966 max_sectors = hwif->rqsize;
967 blk_queue_max_sectors(q, max_sectors);
969 #ifdef CONFIG_PCI
970 /* When we have an IOMMU, we may have a problem where pci_map_sg()
971 * creates segments that don't completely match our boundary
972 * requirements and thus need to be broken up again. Because it
973 * doesn't align properly either, we may actually have to break up
974 * to more segments than what was we got in the first place, a max
975 * worst case is twice as many.
976 * This will be fixed once we teach pci_map_sg() about our boundary
977 * requirements, hopefully soon. *FIXME*
978 */
979 if (!PCI_DMA_BUS_IS_PHYS)
980 max_sg_entries >>= 1;
981 #endif /* CONFIG_PCI */
983 blk_queue_max_hw_segments(q, max_sg_entries);
984 blk_queue_max_phys_segments(q, max_sg_entries);
986 /* assign drive queue */
987 drive->queue = q;
989 /* needs drive->queue to be set */
990 ide_toggle_bounce(drive, 1);
992 /* enable led activity for disk drives only */
993 if (drive->media == ide_disk && hwif->led_act)
994 blk_queue_activity_fn(q, hwif->led_act, drive);
996 return 0;
997 }
999 /*
1000 * This routine sets up the irq for an ide interface, and creates a new
1001 * hwgroup for the irq/hwif if none was previously assigned.
1003 * Much of the code is for correctly detecting/handling irq sharing
1004 * and irq serialization situations. This is somewhat complex because
1005 * it handles static as well as dynamic (PCMCIA) IDE interfaces.
1007 * The IRQF_DISABLED in sa_flags means ide_intr() is always entered with
1008 * interrupts completely disabled. This can be bad for interrupt latency,
1009 * but anything else has led to problems on some machines. We re-enable
1010 * interrupts as much as we can safely do in most places.
1011 */
1012 static int init_irq (ide_hwif_t *hwif)
1014 unsigned int index;
1015 ide_hwgroup_t *hwgroup;
1016 ide_hwif_t *match = NULL;
1019 BUG_ON(in_interrupt());
1020 BUG_ON(irqs_disabled());
1021 BUG_ON(hwif == NULL);
1023 down(&ide_cfg_sem);
1024 hwif->hwgroup = NULL;
1025 #if MAX_HWIFS > 1
1026 /*
1027 * Group up with any other hwifs that share our irq(s).
1028 */
1029 for (index = 0; index < MAX_HWIFS; index++) {
1030 ide_hwif_t *h = &ide_hwifs[index];
1031 if (h->hwgroup) { /* scan only initialized hwif's */
1032 if (hwif->irq == h->irq) {
1033 hwif->sharing_irq = h->sharing_irq = 1;
1034 if (hwif->chipset != ide_pci ||
1035 h->chipset != ide_pci) {
1036 save_match(hwif, h, &match);
1039 if (hwif->serialized) {
1040 if (hwif->mate && hwif->mate->irq == h->irq)
1041 save_match(hwif, h, &match);
1043 if (h->serialized) {
1044 if (h->mate && hwif->irq == h->mate->irq)
1045 save_match(hwif, h, &match);
1049 #endif /* MAX_HWIFS > 1 */
1050 /*
1051 * If we are still without a hwgroup, then form a new one
1052 */
1053 if (match) {
1054 hwgroup = match->hwgroup;
1055 hwif->hwgroup = hwgroup;
1056 /*
1057 * Link us into the hwgroup.
1058 * This must be done early, do ensure that unexpected_intr
1059 * can find the hwif and prevent irq storms.
1060 * No drives are attached to the new hwif, choose_drive
1061 * can't do anything stupid (yet).
1062 * Add ourself as the 2nd entry to the hwgroup->hwif
1063 * linked list, the first entry is the hwif that owns
1064 * hwgroup->handler - do not change that.
1065 */
1066 spin_lock_irq(&ide_lock);
1067 hwif->next = hwgroup->hwif->next;
1068 hwgroup->hwif->next = hwif;
1069 spin_unlock_irq(&ide_lock);
1070 } else {
1071 hwgroup = kmalloc_node(sizeof(ide_hwgroup_t), GFP_KERNEL,
1072 hwif_to_node(hwif->drives[0].hwif));
1073 if (!hwgroup)
1074 goto out_up;
1076 hwif->hwgroup = hwgroup;
1078 memset(hwgroup, 0, sizeof(ide_hwgroup_t));
1079 hwgroup->hwif = hwif->next = hwif;
1080 hwgroup->rq = NULL;
1081 hwgroup->handler = NULL;
1082 hwgroup->drive = NULL;
1083 hwgroup->busy = 0;
1084 init_timer(&hwgroup->timer);
1085 hwgroup->timer.function = &ide_timer_expiry;
1086 hwgroup->timer.data = (unsigned long) hwgroup;
1089 /*
1090 * Allocate the irq, if not already obtained for another hwif
1091 */
1092 if (!match || match->irq != hwif->irq) {
1093 int sa = IRQF_DISABLED;
1094 #if defined(__mc68000__) || defined(CONFIG_APUS)
1095 sa = IRQF_SHARED;
1096 #endif /* __mc68000__ || CONFIG_APUS */
1098 if (IDE_CHIPSET_IS_PCI(hwif->chipset)) {
1099 sa = IRQF_SHARED;
1100 #ifndef CONFIG_IDEPCI_SHARE_IRQ
1101 sa |= IRQF_DISABLED;
1102 #endif /* CONFIG_IDEPCI_SHARE_IRQ */
1105 if (hwif->io_ports[IDE_CONTROL_OFFSET])
1106 /* clear nIEN */
1107 hwif->OUTB(0x08, hwif->io_ports[IDE_CONTROL_OFFSET]);
1109 if (request_irq(hwif->irq,&ide_intr,sa,hwif->name,hwgroup))
1110 goto out_unlink;
1113 /*
1114 * For any present drive:
1115 * - allocate the block device queue
1116 * - link drive into the hwgroup
1117 */
1118 for (index = 0; index < MAX_DRIVES; ++index) {
1119 ide_drive_t *drive = &hwif->drives[index];
1120 if (!drive->present)
1121 continue;
1122 if (ide_init_queue(drive)) {
1123 printk(KERN_ERR "ide: failed to init %s\n",drive->name);
1124 continue;
1126 spin_lock_irq(&ide_lock);
1127 if (!hwgroup->drive) {
1128 /* first drive for hwgroup. */
1129 drive->next = drive;
1130 hwgroup->drive = drive;
1131 hwgroup->hwif = HWIF(hwgroup->drive);
1132 } else {
1133 drive->next = hwgroup->drive->next;
1134 hwgroup->drive->next = drive;
1136 spin_unlock_irq(&ide_lock);
1139 #if !defined(__mc68000__) && !defined(CONFIG_APUS)
1140 printk("%s at 0x%03lx-0x%03lx,0x%03lx on irq %d", hwif->name,
1141 hwif->io_ports[IDE_DATA_OFFSET],
1142 hwif->io_ports[IDE_DATA_OFFSET]+7,
1143 hwif->io_ports[IDE_CONTROL_OFFSET], hwif->irq);
1144 #else
1145 printk("%s at 0x%08lx on irq %d", hwif->name,
1146 hwif->io_ports[IDE_DATA_OFFSET], hwif->irq);
1147 #endif /* __mc68000__ && CONFIG_APUS */
1148 if (match)
1149 printk(" (%sed with %s)",
1150 hwif->sharing_irq ? "shar" : "serializ", match->name);
1151 printk("\n");
1152 up(&ide_cfg_sem);
1153 return 0;
1154 out_unlink:
1155 spin_lock_irq(&ide_lock);
1156 if (hwif->next == hwif) {
1157 BUG_ON(match);
1158 BUG_ON(hwgroup->hwif != hwif);
1159 kfree(hwgroup);
1160 } else {
1161 ide_hwif_t *g;
1162 g = hwgroup->hwif;
1163 while (g->next != hwif)
1164 g = g->next;
1165 g->next = hwif->next;
1166 if (hwgroup->hwif == hwif) {
1167 /* Impossible. */
1168 printk(KERN_ERR "Duh. Uninitialized hwif listed as active hwif.\n");
1169 hwgroup->hwif = g;
1171 BUG_ON(hwgroup->hwif == hwif);
1173 spin_unlock_irq(&ide_lock);
1174 out_up:
1175 up(&ide_cfg_sem);
1176 return 1;
1179 static int ata_lock(dev_t dev, void *data)
1181 /* FIXME: we want to pin hwif down */
1182 return 0;
1185 static struct kobject *ata_probe(dev_t dev, int *part, void *data)
1187 ide_hwif_t *hwif = data;
1188 int unit = *part >> PARTN_BITS;
1189 ide_drive_t *drive = &hwif->drives[unit];
1190 if (!drive->present)
1191 return NULL;
1193 if (drive->media == ide_disk)
1194 request_module("ide-disk");
1195 if (drive->scsi)
1196 request_module("ide-scsi");
1197 if (drive->media == ide_cdrom || drive->media == ide_optical)
1198 request_module("ide-cd");
1199 if (drive->media == ide_tape)
1200 request_module("ide-tape");
1201 if (drive->media == ide_floppy)
1202 request_module("ide-floppy");
1204 return NULL;
1207 static struct kobject *exact_match(dev_t dev, int *part, void *data)
1209 struct gendisk *p = data;
1210 *part &= (1 << PARTN_BITS) - 1;
1211 return &p->kobj;
1214 static int exact_lock(dev_t dev, void *data)
1216 struct gendisk *p = data;
1218 if (!get_disk(p))
1219 return -1;
1220 return 0;
1223 void ide_register_region(struct gendisk *disk)
1225 blk_register_region(MKDEV(disk->major, disk->first_minor),
1226 disk->minors, NULL, exact_match, exact_lock, disk);
1229 EXPORT_SYMBOL_GPL(ide_register_region);
1231 void ide_unregister_region(struct gendisk *disk)
1233 blk_unregister_region(MKDEV(disk->major, disk->first_minor),
1234 disk->minors);
1237 EXPORT_SYMBOL_GPL(ide_unregister_region);
1239 void ide_init_disk(struct gendisk *disk, ide_drive_t *drive)
1241 ide_hwif_t *hwif = drive->hwif;
1242 unsigned int unit = (drive->select.all >> 4) & 1;
1244 disk->major = hwif->major;
1245 disk->first_minor = unit << PARTN_BITS;
1246 sprintf(disk->disk_name, "hd%c", 'a' + hwif->index * MAX_DRIVES + unit);
1247 disk->queue = drive->queue;
1250 EXPORT_SYMBOL_GPL(ide_init_disk);
1252 static void ide_remove_drive_from_hwgroup(ide_drive_t *drive)
1254 ide_hwgroup_t *hwgroup = drive->hwif->hwgroup;
1256 if (drive == drive->next) {
1257 /* special case: last drive from hwgroup. */
1258 BUG_ON(hwgroup->drive != drive);
1259 hwgroup->drive = NULL;
1260 } else {
1261 ide_drive_t *walk;
1263 walk = hwgroup->drive;
1264 while (walk->next != drive)
1265 walk = walk->next;
1266 walk->next = drive->next;
1267 if (hwgroup->drive == drive) {
1268 hwgroup->drive = drive->next;
1269 hwgroup->hwif = hwgroup->drive->hwif;
1272 BUG_ON(hwgroup->drive == drive);
1275 static void drive_release_dev (struct device *dev)
1277 ide_drive_t *drive = container_of(dev, ide_drive_t, gendev);
1279 spin_lock_irq(&ide_lock);
1280 ide_remove_drive_from_hwgroup(drive);
1281 kfree(drive->id);
1282 drive->id = NULL;
1283 drive->present = 0;
1284 /* Messed up locking ... */
1285 spin_unlock_irq(&ide_lock);
1286 blk_cleanup_queue(drive->queue);
1287 spin_lock_irq(&ide_lock);
1288 drive->queue = NULL;
1289 spin_unlock_irq(&ide_lock);
1291 complete(&drive->gendev_rel_comp);
1294 /*
1295 * init_gendisk() (as opposed to ide_geninit) is called for each major device,
1296 * after probing for drives, to allocate partition tables and other data
1297 * structures needed for the routines in genhd.c. ide_geninit() gets called
1298 * somewhat later, during the partition check.
1299 */
1300 static void init_gendisk (ide_hwif_t *hwif)
1302 unsigned int unit;
1304 for (unit = 0; unit < MAX_DRIVES; ++unit) {
1305 ide_drive_t * drive = &hwif->drives[unit];
1306 ide_add_generic_settings(drive);
1307 snprintf(drive->gendev.bus_id,BUS_ID_SIZE,"%u.%u",
1308 hwif->index,unit);
1309 drive->gendev.parent = &hwif->gendev;
1310 drive->gendev.bus = &ide_bus_type;
1311 drive->gendev.driver_data = drive;
1312 drive->gendev.release = drive_release_dev;
1314 blk_register_region(MKDEV(hwif->major, 0), MAX_DRIVES << PARTN_BITS,
1315 THIS_MODULE, ata_probe, ata_lock, hwif);
1318 static int hwif_init(ide_hwif_t *hwif)
1320 int old_irq;
1322 /* Return success if no device is connected */
1323 if (!hwif->present)
1324 return 1;
1326 if (!hwif->irq) {
1327 if (!(hwif->irq = ide_default_irq(hwif->io_ports[IDE_DATA_OFFSET])))
1329 printk("%s: DISABLED, NO IRQ\n", hwif->name);
1330 return (hwif->present = 0);
1333 #ifdef CONFIG_BLK_DEV_HD
1334 if (hwif->irq == HD_IRQ && hwif->io_ports[IDE_DATA_OFFSET] != HD_DATA) {
1335 printk("%s: CANNOT SHARE IRQ WITH OLD "
1336 "HARDDISK DRIVER (hd.c)\n", hwif->name);
1337 return (hwif->present = 0);
1339 #endif /* CONFIG_BLK_DEV_HD */
1341 /* we set it back to 1 if all is ok below */
1342 hwif->present = 0;
1344 if (register_blkdev(hwif->major, hwif->name))
1345 return 0;
1347 if (!hwif->sg_max_nents)
1348 hwif->sg_max_nents = PRD_ENTRIES;
1350 hwif->sg_table = kmalloc(sizeof(struct scatterlist)*hwif->sg_max_nents,
1351 GFP_KERNEL);
1352 if (!hwif->sg_table) {
1353 printk(KERN_ERR "%s: unable to allocate SG table.\n", hwif->name);
1354 goto out;
1357 if (init_irq(hwif) == 0)
1358 goto done;
1360 old_irq = hwif->irq;
1361 /*
1362 * It failed to initialise. Find the default IRQ for
1363 * this port and try that.
1364 */
1365 if (!(hwif->irq = ide_default_irq(hwif->io_ports[IDE_DATA_OFFSET]))) {
1366 printk("%s: Disabled unable to get IRQ %d.\n",
1367 hwif->name, old_irq);
1368 goto out;
1370 if (init_irq(hwif)) {
1371 printk("%s: probed IRQ %d and default IRQ %d failed.\n",
1372 hwif->name, old_irq, hwif->irq);
1373 goto out;
1375 printk("%s: probed IRQ %d failed, using default.\n",
1376 hwif->name, hwif->irq);
1378 done:
1379 init_gendisk(hwif);
1380 hwif->present = 1; /* success */
1381 return 1;
1383 out:
1384 unregister_blkdev(hwif->major, hwif->name);
1385 return 0;
1388 int ideprobe_init (void)
1390 unsigned int index;
1391 int probe[MAX_HWIFS];
1393 memset(probe, 0, MAX_HWIFS * sizeof(int));
1394 for (index = 0; index < MAX_HWIFS; ++index)
1395 probe[index] = !ide_hwifs[index].present;
1397 for (index = 0; index < MAX_HWIFS; ++index)
1398 if (probe[index])
1399 probe_hwif(&ide_hwifs[index]);
1400 for (index = 0; index < MAX_HWIFS; ++index)
1401 if (probe[index])
1402 hwif_init(&ide_hwifs[index]);
1403 for (index = 0; index < MAX_HWIFS; ++index) {
1404 if (probe[index]) {
1405 ide_hwif_t *hwif = &ide_hwifs[index];
1406 int unit;
1407 if (!hwif->present)
1408 continue;
1409 if (hwif->chipset == ide_unknown || hwif->chipset == ide_forced)
1410 hwif->chipset = ide_generic;
1411 for (unit = 0; unit < MAX_DRIVES; ++unit)
1412 if (hwif->drives[unit].present)
1413 device_register(&hwif->drives[unit].gendev);
1416 return 0;
1419 EXPORT_SYMBOL_GPL(ideprobe_init);