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1/*
2 * Copyright (C) 1994-1998 Linus Torvalds & authors (see below)
3 * Copyright (C) 2005, 2007 Bartlomiej Zolnierkiewicz
4 */
5
6/*
7 * Mostly written by Mark Lord <mlord@pobox.com>
8 * and Gadi Oxman <gadio@netvision.net.il>
9 * and Andre Hedrick <andre@linux-ide.org>
10 *
11 * See linux/MAINTAINERS for address of current maintainer.
12 *
13 * This is the IDE probe module, as evolved from hd.c and ide.c.
14 *
15 * -- increase WAIT_PIDENTIFY to avoid CD-ROM locking at boot
16 * by Andrea Arcangeli
17 */
18
19#include <linux/module.h>
20#include <linux/types.h>
21#include <linux/string.h>
22#include <linux/kernel.h>
23#include <linux/timer.h>
24#include <linux/mm.h>
25#include <linux/interrupt.h>
26#include <linux/major.h>
27#include <linux/errno.h>
28#include <linux/genhd.h>
29#include <linux/slab.h>
30#include <linux/delay.h>
31#include <linux/ide.h>
32#include <linux/spinlock.h>
33#include <linux/kmod.h>
34#include <linux/pci.h>
35#include <linux/scatterlist.h>
36
37#include <asm/byteorder.h>
38#include <asm/irq.h>
39#include <asm/uaccess.h>
40#include <asm/io.h>
41
42/**
43 * generic_id - add a generic drive id
44 * @drive: drive to make an ID block for
45 *
46 * Add a fake id field to the drive we are passed. This allows
47 * use to skip a ton of NULL checks (which people always miss)
48 * and make drive properties unconditional outside of this file
49 */
50
51static void generic_id(ide_drive_t *drive)
52{
53 u16 *id = drive->id;
54
55 id[ATA_ID_CUR_CYLS] = id[ATA_ID_CYLS] = drive->cyl;
56 id[ATA_ID_CUR_HEADS] = id[ATA_ID_HEADS] = drive->head;
57 id[ATA_ID_CUR_SECTORS] = id[ATA_ID_SECTORS] = drive->sect;
58}
59
60static void ide_disk_init_chs(ide_drive_t *drive)
61{
62 u16 *id = drive->id;
63
64 /* Extract geometry if we did not already have one for the drive */
65 if (!drive->cyl || !drive->head || !drive->sect) {
66 drive->cyl = drive->bios_cyl = id[ATA_ID_CYLS];
67 drive->head = drive->bios_head = id[ATA_ID_HEADS];
68 drive->sect = drive->bios_sect = id[ATA_ID_SECTORS];
69 }
70
71 /* Handle logical geometry translation by the drive */
72 if (ata_id_current_chs_valid(id)) {
73 drive->cyl = id[ATA_ID_CUR_CYLS];
74 drive->head = id[ATA_ID_CUR_HEADS];
75 drive->sect = id[ATA_ID_CUR_SECTORS];
76 }
77
78 /* Use physical geometry if what we have still makes no sense */
79 if (drive->head > 16 && id[ATA_ID_HEADS] && id[ATA_ID_HEADS] <= 16) {
80 drive->cyl = id[ATA_ID_CYLS];
81 drive->head = id[ATA_ID_HEADS];
82 drive->sect = id[ATA_ID_SECTORS];
83 }
84}
85
86static void ide_disk_init_mult_count(ide_drive_t *drive)
87{
88 u16 *id = drive->id;
89 u8 max_multsect = id[ATA_ID_MAX_MULTSECT] & 0xff;
90
91 if (max_multsect) {
92 if ((max_multsect / 2) > 1)
93 id[ATA_ID_MULTSECT] = max_multsect | 0x100;
94 else
95 id[ATA_ID_MULTSECT] &= ~0x1ff;
96
97 drive->mult_req = id[ATA_ID_MULTSECT] & 0xff;
98
99 if (drive->mult_req)
100 drive->special_flags |= IDE_SFLAG_SET_MULTMODE;
101 }
102}
103
104static void ide_classify_ata_dev(ide_drive_t *drive)
105{
106 u16 *id = drive->id;
107 char *m = (char *)&id[ATA_ID_PROD];
108 int is_cfa = ata_id_is_cfa(id);
109
110 /* CF devices are *not* removable in Linux definition of the term */
111 if (is_cfa == 0 && (id[ATA_ID_CONFIG] & (1 << 7)))
112 drive->dev_flags |= IDE_DFLAG_REMOVABLE;
113
114 drive->media = ide_disk;
115
116 if (!ata_id_has_unload(drive->id))
117 drive->dev_flags |= IDE_DFLAG_NO_UNLOAD;
118
119 printk(KERN_INFO "%s: %s, %s DISK drive\n", drive->name, m,
120 is_cfa ? "CFA" : "ATA");
121}
122
123static void ide_classify_atapi_dev(ide_drive_t *drive)
124{
125 u16 *id = drive->id;
126 char *m = (char *)&id[ATA_ID_PROD];
127 u8 type = (id[ATA_ID_CONFIG] >> 8) & 0x1f;
128
129 printk(KERN_INFO "%s: %s, ATAPI ", drive->name, m);
130 switch (type) {
131 case ide_floppy:
132 if (!strstr(m, "CD-ROM")) {
133 if (!strstr(m, "oppy") &&
134 !strstr(m, "poyp") &&
135 !strstr(m, "ZIP"))
136 printk(KERN_CONT "cdrom or floppy?, assuming ");
137 if (drive->media != ide_cdrom) {
138 printk(KERN_CONT "FLOPPY");
139 drive->dev_flags |= IDE_DFLAG_REMOVABLE;
140 break;
141 }
142 }
143 /* Early cdrom models used zero */
144 type = ide_cdrom;
145 case ide_cdrom:
146 drive->dev_flags |= IDE_DFLAG_REMOVABLE;
147#ifdef CONFIG_PPC
148 /* kludge for Apple PowerBook internal zip */
149 if (!strstr(m, "CD-ROM") && strstr(m, "ZIP")) {
150 printk(KERN_CONT "FLOPPY");
151 type = ide_floppy;
152 break;
153 }
154#endif
155 printk(KERN_CONT "CD/DVD-ROM");
156 break;
157 case ide_tape:
158 printk(KERN_CONT "TAPE");
159 break;
160 case ide_optical:
161 printk(KERN_CONT "OPTICAL");
162 drive->dev_flags |= IDE_DFLAG_REMOVABLE;
163 break;
164 default:
165 printk(KERN_CONT "UNKNOWN (type %d)", type);
166 break;
167 }
168
169 printk(KERN_CONT " drive\n");
170 drive->media = type;
171 /* an ATAPI device ignores DRDY */
172 drive->ready_stat = 0;
173 if (ata_id_cdb_intr(id))
174 drive->atapi_flags |= IDE_AFLAG_DRQ_INTERRUPT;
175 drive->dev_flags |= IDE_DFLAG_DOORLOCKING;
176 /* we don't do head unloading on ATAPI devices */
177 drive->dev_flags |= IDE_DFLAG_NO_UNLOAD;
178}
179
180/**
181 * do_identify - identify a drive
182 * @drive: drive to identify
183 * @cmd: command used
184 * @id: buffer for IDENTIFY data
185 *
186 * Called when we have issued a drive identify command to
187 * read and parse the results. This function is run with
188 * interrupts disabled.
189 */
190
191static void do_identify(ide_drive_t *drive, u8 cmd, u16 *id)
192{
193 ide_hwif_t *hwif = drive->hwif;
194 char *m = (char *)&id[ATA_ID_PROD];
195 unsigned long flags;
196 int bswap = 1;
197
198 /* local CPU only; some systems need this */
199 local_irq_save(flags);
200 /* read 512 bytes of id info */
201 hwif->tp_ops->input_data(drive, NULL, id, SECTOR_SIZE);
202 local_irq_restore(flags);
203
204 drive->dev_flags |= IDE_DFLAG_ID_READ;
205#ifdef DEBUG
206 printk(KERN_INFO "%s: dumping identify data\n", drive->name);
207 ide_dump_identify((u8 *)id);
208#endif
209 ide_fix_driveid(id);
210
211 /*
212 * ATA_CMD_ID_ATA returns little-endian info,
213 * ATA_CMD_ID_ATAPI *usually* returns little-endian info.
214 */
215 if (cmd == ATA_CMD_ID_ATAPI) {
216 if ((m[0] == 'N' && m[1] == 'E') || /* NEC */
217 (m[0] == 'F' && m[1] == 'X') || /* Mitsumi */
218 (m[0] == 'P' && m[1] == 'i')) /* Pioneer */
219 /* Vertos drives may still be weird */
220 bswap ^= 1;
221 }
222
223 ide_fixstring(m, ATA_ID_PROD_LEN, bswap);
224 ide_fixstring((char *)&id[ATA_ID_FW_REV], ATA_ID_FW_REV_LEN, bswap);
225 ide_fixstring((char *)&id[ATA_ID_SERNO], ATA_ID_SERNO_LEN, bswap);
226
227 /* we depend on this a lot! */
228 m[ATA_ID_PROD_LEN - 1] = '\0';
229
230 if (strstr(m, "E X A B Y T E N E S T"))
231 drive->dev_flags &= ~IDE_DFLAG_PRESENT;
232 else
233 drive->dev_flags |= IDE_DFLAG_PRESENT;
234}
235
236/**
237 * ide_dev_read_id - send ATA/ATAPI IDENTIFY command
238 * @drive: drive to identify
239 * @cmd: command to use
240 * @id: buffer for IDENTIFY data
241 * @irq_ctx: flag set when called from the IRQ context
242 *
243 * Sends an ATA(PI) IDENTIFY request to a drive and waits for a response.
244 *
245 * Returns: 0 device was identified
246 * 1 device timed-out (no response to identify request)
247 * 2 device aborted the command (refused to identify itself)
248 */
249
250int ide_dev_read_id(ide_drive_t *drive, u8 cmd, u16 *id, int irq_ctx)
251{
252 ide_hwif_t *hwif = drive->hwif;
253 struct ide_io_ports *io_ports = &hwif->io_ports;
254 const struct ide_tp_ops *tp_ops = hwif->tp_ops;
255 int use_altstatus = 0, rc;
256 unsigned long timeout;
257 u8 s = 0, a = 0;
258
259 /*
260 * Disable device IRQ. Otherwise we'll get spurious interrupts
261 * during the identify phase that the IRQ handler isn't expecting.
262 */
263 if (io_ports->ctl_addr)
264 tp_ops->write_devctl(hwif, ATA_NIEN | ATA_DEVCTL_OBS);
265
266 /* take a deep breath */
267 if (irq_ctx)
268 mdelay(50);
269 else
270 msleep(50);
271
272 if (io_ports->ctl_addr &&
273 (hwif->host_flags & IDE_HFLAG_BROKEN_ALTSTATUS) == 0) {
274 a = tp_ops->read_altstatus(hwif);
275 s = tp_ops->read_status(hwif);
276 if ((a ^ s) & ~ATA_IDX)
277 /* ancient Seagate drives, broken interfaces */
278 printk(KERN_INFO "%s: probing with STATUS(0x%02x) "
279 "instead of ALTSTATUS(0x%02x)\n",
280 drive->name, s, a);
281 else
282 /* use non-intrusive polling */
283 use_altstatus = 1;
284 }
285
286 /* set features register for atapi
287 * identify command to be sure of reply
288 */
289 if (cmd == ATA_CMD_ID_ATAPI) {
290 struct ide_taskfile tf;
291
292 memset(&tf, 0, sizeof(tf));
293 /* disable DMA & overlap */
294 tp_ops->tf_load(drive, &tf, IDE_VALID_FEATURE);
295 }
296
297 /* ask drive for ID */
298 tp_ops->exec_command(hwif, cmd);
299
300 timeout = ((cmd == ATA_CMD_ID_ATA) ? WAIT_WORSTCASE : WAIT_PIDENTIFY) / 2;
301
302 /* wait for IRQ and ATA_DRQ */
303 if (irq_ctx) {
304 rc = __ide_wait_stat(drive, ATA_DRQ, BAD_R_STAT, timeout, &s);
305 if (rc)
306 return 1;
307 } else {
308 rc = ide_busy_sleep(drive, timeout, use_altstatus);
309 if (rc)
310 return 1;
311
312 msleep(50);
313 s = tp_ops->read_status(hwif);
314 }
315
316 if (OK_STAT(s, ATA_DRQ, BAD_R_STAT)) {
317 /* drive returned ID */
318 do_identify(drive, cmd, id);
319 /* drive responded with ID */
320 rc = 0;
321 /* clear drive IRQ */
322 (void)tp_ops->read_status(hwif);
323 } else {
324 /* drive refused ID */
325 rc = 2;
326 }
327 return rc;
328}
329
330int ide_busy_sleep(ide_drive_t *drive, unsigned long timeout, int altstatus)
331{
332 ide_hwif_t *hwif = drive->hwif;
333 u8 stat;
334
335 timeout += jiffies;
336
337 do {
338 msleep(50); /* give drive a breather */
339 stat = altstatus ? hwif->tp_ops->read_altstatus(hwif)
340 : hwif->tp_ops->read_status(hwif);
341 if ((stat & ATA_BUSY) == 0)
342 return 0;
343 } while (time_before(jiffies, timeout));
344
345 printk(KERN_ERR "%s: timeout in %s\n", drive->name, __func__);
346
347 return 1; /* drive timed-out */
348}
349
350static u8 ide_read_device(ide_drive_t *drive)
351{
352 struct ide_taskfile tf;
353
354 drive->hwif->tp_ops->tf_read(drive, &tf, IDE_VALID_DEVICE);
355
356 return tf.device;
357}
358
359/**
360 * do_probe - probe an IDE device
361 * @drive: drive to probe
362 * @cmd: command to use
363 *
364 * do_probe() has the difficult job of finding a drive if it exists,
365 * without getting hung up if it doesn't exist, without trampling on
366 * ethernet cards, and without leaving any IRQs dangling to haunt us later.
367 *
368 * If a drive is "known" to exist (from CMOS or kernel parameters),
369 * but does not respond right away, the probe will "hang in there"
370 * for the maximum wait time (about 30 seconds), otherwise it will
371 * exit much more quickly.
372 *
373 * Returns: 0 device was identified
374 * 1 device timed-out (no response to identify request)
375 * 2 device aborted the command (refused to identify itself)
376 * 3 bad status from device (possible for ATAPI drives)
377 * 4 probe was not attempted because failure was obvious
378 */
379
380static int do_probe (ide_drive_t *drive, u8 cmd)
381{
382 ide_hwif_t *hwif = drive->hwif;
383 const struct ide_tp_ops *tp_ops = hwif->tp_ops;
384 u16 *id = drive->id;
385 int rc;
386 u8 present = !!(drive->dev_flags & IDE_DFLAG_PRESENT), stat;
387
388 /* avoid waiting for inappropriate probes */
389 if (present && drive->media != ide_disk && cmd == ATA_CMD_ID_ATA)
390 return 4;
391
392#ifdef DEBUG
393 printk(KERN_INFO "probing for %s: present=%d, media=%d, probetype=%s\n",
394 drive->name, present, drive->media,
395 (cmd == ATA_CMD_ID_ATA) ? "ATA" : "ATAPI");
396#endif
397
398 /* needed for some systems
399 * (e.g. crw9624 as drive0 with disk as slave)
400 */
401 msleep(50);
402 tp_ops->dev_select(drive);
403 msleep(50);
404
405 if (ide_read_device(drive) != drive->select && present == 0) {
406 if (drive->dn & 1) {
407 /* exit with drive0 selected */
408 tp_ops->dev_select(hwif->devices[0]);
409 /* allow ATA_BUSY to assert & clear */
410 msleep(50);
411 }
412 /* no i/f present: mmm.. this should be a 4 -ml */
413 return 3;
414 }
415
416 stat = tp_ops->read_status(hwif);
417
418 if (OK_STAT(stat, ATA_DRDY, ATA_BUSY) ||
419 present || cmd == ATA_CMD_ID_ATAPI) {
420 rc = ide_dev_read_id(drive, cmd, id, 0);
421 if (rc)
422 /* failed: try again */
423 rc = ide_dev_read_id(drive, cmd, id, 0);
424
425 stat = tp_ops->read_status(hwif);
426
427 if (stat == (ATA_BUSY | ATA_DRDY))
428 return 4;
429
430 if (rc == 1 && cmd == ATA_CMD_ID_ATAPI) {
431 printk(KERN_ERR "%s: no response (status = 0x%02x), "
432 "resetting drive\n", drive->name, stat);
433 msleep(50);
434 tp_ops->dev_select(drive);
435 msleep(50);
436 tp_ops->exec_command(hwif, ATA_CMD_DEV_RESET);
437 (void)ide_busy_sleep(drive, WAIT_WORSTCASE, 0);
438 rc = ide_dev_read_id(drive, cmd, id, 0);
439 }
440
441 /* ensure drive IRQ is clear */
442 stat = tp_ops->read_status(hwif);
443
444 if (rc == 1)
445 printk(KERN_ERR "%s: no response (status = 0x%02x)\n",
446 drive->name, stat);
447 } else {
448 /* not present or maybe ATAPI */
449 rc = 3;
450 }
451 if (drive->dn & 1) {
452 /* exit with drive0 selected */
453 tp_ops->dev_select(hwif->devices[0]);
454 msleep(50);
455 /* ensure drive irq is clear */
456 (void)tp_ops->read_status(hwif);
457 }
458 return rc;
459}
460
461/**
462 * probe_for_drives - upper level drive probe
463 * @drive: drive to probe for
464 *
465 * probe_for_drive() tests for existence of a given drive using do_probe()
466 * and presents things to the user as needed.
467 *
468 * Returns: 0 no device was found
469 * 1 device was found
470 * (note: IDE_DFLAG_PRESENT might still be not set)
471 */
472
473static u8 probe_for_drive(ide_drive_t *drive)
474{
475 char *m;
476 int rc;
477 u8 cmd;
478
479 drive->dev_flags &= ~IDE_DFLAG_ID_READ;
480
481 m = (char *)&drive->id[ATA_ID_PROD];
482 strcpy(m, "UNKNOWN");
483
484 /* skip probing? */
485 if ((drive->dev_flags & IDE_DFLAG_NOPROBE) == 0) {
486 /* if !(success||timed-out) */
487 cmd = ATA_CMD_ID_ATA;
488 rc = do_probe(drive, cmd);
489 if (rc >= 2) {
490 /* look for ATAPI device */
491 cmd = ATA_CMD_ID_ATAPI;
492 rc = do_probe(drive, cmd);
493 }
494
495 if ((drive->dev_flags & IDE_DFLAG_PRESENT) == 0)
496 return 0;
497
498 /* identification failed? */
499 if ((drive->dev_flags & IDE_DFLAG_ID_READ) == 0) {
500 if (drive->media == ide_disk) {
501 printk(KERN_INFO "%s: non-IDE drive, CHS=%d/%d/%d\n",
502 drive->name, drive->cyl,
503 drive->head, drive->sect);
504 } else if (drive->media == ide_cdrom) {
505 printk(KERN_INFO "%s: ATAPI cdrom (?)\n", drive->name);
506 } else {
507 /* nuke it */
508 printk(KERN_WARNING "%s: Unknown device on bus refused identification. Ignoring.\n", drive->name);
509 drive->dev_flags &= ~IDE_DFLAG_PRESENT;
510 }
511 } else {
512 if (cmd == ATA_CMD_ID_ATAPI)
513 ide_classify_atapi_dev(drive);
514 else
515 ide_classify_ata_dev(drive);
516 }
517 }
518
519 if ((drive->dev_flags & IDE_DFLAG_PRESENT) == 0)
520 return 0;
521
522 /* The drive wasn't being helpful. Add generic info only */
523 if ((drive->dev_flags & IDE_DFLAG_ID_READ) == 0) {
524 generic_id(drive);
525 return 1;
526 }
527
528 if (drive->media == ide_disk) {
529 ide_disk_init_chs(drive);
530 ide_disk_init_mult_count(drive);
531 }
532
533 return 1;
534}
535
536static void hwif_release_dev(struct device *dev)
537{
538 ide_hwif_t *hwif = container_of(dev, ide_hwif_t, gendev);
539
540 complete(&hwif->gendev_rel_comp);
541}
542
543static int ide_register_port(ide_hwif_t *hwif)
544{
545 int ret;
546
547 /* register with global device tree */
548 dev_set_name(&hwif->gendev, hwif->name);
549 dev_set_drvdata(&hwif->gendev, hwif);
550 if (hwif->gendev.parent == NULL)
551 hwif->gendev.parent = hwif->dev;
552 hwif->gendev.release = hwif_release_dev;
553
554 ret = device_register(&hwif->gendev);
555 if (ret < 0) {
556 printk(KERN_WARNING "IDE: %s: device_register error: %d\n",
557 __func__, ret);
558 goto out;
559 }
560
561 hwif->portdev = device_create(ide_port_class, &hwif->gendev,
562 MKDEV(0, 0), hwif, hwif->name);
563 if (IS_ERR(hwif->portdev)) {
564 ret = PTR_ERR(hwif->portdev);
565 device_unregister(&hwif->gendev);
566 }
567out:
568 return ret;
569}
570
571/**
572 * ide_port_wait_ready - wait for port to become ready
573 * @hwif: IDE port
574 *
575 * This is needed on some PPCs and a bunch of BIOS-less embedded
576 * platforms. Typical cases are:
577 *
578 * - The firmware hard reset the disk before booting the kernel,
579 * the drive is still doing it's poweron-reset sequence, that
580 * can take up to 30 seconds.
581 *
582 * - The firmware does nothing (or no firmware), the device is
583 * still in POST state (same as above actually).
584 *
585 * - Some CD/DVD/Writer combo drives tend to drive the bus during
586 * their reset sequence even when they are non-selected slave
587 * devices, thus preventing discovery of the main HD.
588 *
589 * Doing this wait-for-non-busy should not harm any existing
590 * configuration and fix some issues like the above.
591 *
592 * BenH.
593 *
594 * Returns 0 on success, error code (< 0) otherwise.
595 */
596
597static int ide_port_wait_ready(ide_hwif_t *hwif)
598{
599 const struct ide_tp_ops *tp_ops = hwif->tp_ops;
600 ide_drive_t *drive;
601 int i, rc;
602
603 printk(KERN_DEBUG "Probing IDE interface %s...\n", hwif->name);
604
605 /* Let HW settle down a bit from whatever init state we
606 * come from */
607 mdelay(2);
608
609 /* Wait for BSY bit to go away, spec timeout is 30 seconds,
610 * I know of at least one disk who takes 31 seconds, I use 35
611 * here to be safe
612 */
613 rc = ide_wait_not_busy(hwif, 35000);
614 if (rc)
615 return rc;
616
617 /* Now make sure both master & slave are ready */
618 ide_port_for_each_dev(i, drive, hwif) {
619 /* Ignore disks that we will not probe for later. */
620 if ((drive->dev_flags & IDE_DFLAG_NOPROBE) == 0 ||
621 (drive->dev_flags & IDE_DFLAG_PRESENT)) {
622 tp_ops->dev_select(drive);
623 tp_ops->write_devctl(hwif, ATA_DEVCTL_OBS);
624 mdelay(2);
625 rc = ide_wait_not_busy(hwif, 35000);
626 if (rc)
627 goto out;
628 } else
629 printk(KERN_DEBUG "%s: ide_wait_not_busy() skipped\n",
630 drive->name);
631 }
632out:
633 /* Exit function with master reselected (let's be sane) */
634 if (i)
635 tp_ops->dev_select(hwif->devices[0]);
636
637 return rc;
638}
639
640/**
641 * ide_undecoded_slave - look for bad CF adapters
642 * @dev1: slave device
643 *
644 * Analyse the drives on the interface and attempt to decide if we
645 * have the same drive viewed twice. This occurs with crap CF adapters
646 * and PCMCIA sometimes.
647 */
648
649void ide_undecoded_slave(ide_drive_t *dev1)
650{
651 ide_drive_t *dev0 = dev1->hwif->devices[0];
652
653 if ((dev1->dn & 1) == 0 || (dev0->dev_flags & IDE_DFLAG_PRESENT) == 0)
654 return;
655
656 /* If the models don't match they are not the same product */
657 if (strcmp((char *)&dev0->id[ATA_ID_PROD],
658 (char *)&dev1->id[ATA_ID_PROD]))
659 return;
660
661 /* Serial numbers do not match */
662 if (strncmp((char *)&dev0->id[ATA_ID_SERNO],
663 (char *)&dev1->id[ATA_ID_SERNO], ATA_ID_SERNO_LEN))
664 return;
665
666 /* No serial number, thankfully very rare for CF */
667 if (*(char *)&dev0->id[ATA_ID_SERNO] == 0)
668 return;
669
670 /* Appears to be an IDE flash adapter with decode bugs */
671 printk(KERN_WARNING "ide-probe: ignoring undecoded slave\n");
672
673 dev1->dev_flags &= ~IDE_DFLAG_PRESENT;
674}
675
676EXPORT_SYMBOL_GPL(ide_undecoded_slave);
677
678static int ide_probe_port(ide_hwif_t *hwif)
679{
680 ide_drive_t *drive;
681 unsigned int irqd;
682 int i, rc = -ENODEV;
683
684 BUG_ON(hwif->present);
685
686 if ((hwif->devices[0]->dev_flags & IDE_DFLAG_NOPROBE) &&
687 (hwif->devices[1]->dev_flags & IDE_DFLAG_NOPROBE))
688 return -EACCES;
689
690 /*
691 * We must always disable IRQ, as probe_for_drive will assert IRQ, but
692 * we'll install our IRQ driver much later...
693 */
694 irqd = hwif->irq;
695 if (irqd)
696 disable_irq(hwif->irq);
697
698 if (ide_port_wait_ready(hwif) == -EBUSY)
699 printk(KERN_DEBUG "%s: Wait for ready failed before probe !\n", hwif->name);
700
701 /*
702 * Second drive should only exist if first drive was found,
703 * but a lot of cdrom drives are configured as single slaves.
704 */
705 ide_port_for_each_dev(i, drive, hwif) {
706 (void) probe_for_drive(drive);
707 if (drive->dev_flags & IDE_DFLAG_PRESENT)
708 rc = 0;
709 }
710
711 /*
712 * Use cached IRQ number. It might be (and is...) changed by probe
713 * code above
714 */
715 if (irqd)
716 enable_irq(irqd);
717
718 return rc;
719}
720
721static void ide_port_tune_devices(ide_hwif_t *hwif)
722{
723 const struct ide_port_ops *port_ops = hwif->port_ops;
724 ide_drive_t *drive;
725 int i;
726
727 ide_port_for_each_present_dev(i, drive, hwif) {
728 ide_check_nien_quirk_list(drive);
729
730 if (port_ops && port_ops->quirkproc)
731 port_ops->quirkproc(drive);
732 }
733
734 ide_port_for_each_present_dev(i, drive, hwif) {
735 ide_set_max_pio(drive);
736
737 drive->dev_flags |= IDE_DFLAG_NICE1;
738
739 if (hwif->dma_ops)
740 ide_set_dma(drive);
741 }
742}
743
744/*
745 * init request queue
746 */
747static int ide_init_queue(ide_drive_t *drive)
748{
749 struct request_queue *q;
750 ide_hwif_t *hwif = drive->hwif;
751 int max_sectors = 256;
752 int max_sg_entries = PRD_ENTRIES;
753
754 /*
755 * Our default set up assumes the normal IDE case,
756 * that is 64K segmenting, standard PRD setup
757 * and LBA28. Some drivers then impose their own
758 * limits and LBA48 we could raise it but as yet
759 * do not.
760 */
761
762 q = blk_init_queue_node(do_ide_request, NULL, hwif_to_node(hwif));
763 if (!q)
764 return 1;
765
766 q->queuedata = drive;
767 blk_queue_segment_boundary(q, 0xffff);
768
769 if (hwif->rqsize < max_sectors)
770 max_sectors = hwif->rqsize;
771 blk_queue_max_hw_sectors(q, max_sectors);
772
773#ifdef CONFIG_PCI
774 /* When we have an IOMMU, we may have a problem where pci_map_sg()
775 * creates segments that don't completely match our boundary
776 * requirements and thus need to be broken up again. Because it
777 * doesn't align properly either, we may actually have to break up
778 * to more segments than what was we got in the first place, a max
779 * worst case is twice as many.
780 * This will be fixed once we teach pci_map_sg() about our boundary
781 * requirements, hopefully soon. *FIXME*
782 */
783 if (!PCI_DMA_BUS_IS_PHYS)
784 max_sg_entries >>= 1;
785#endif /* CONFIG_PCI */
786
787 blk_queue_max_segments(q, max_sg_entries);
788
789 /* assign drive queue */
790 drive->queue = q;
791
792 /* needs drive->queue to be set */
793 ide_toggle_bounce(drive, 1);
794
795 return 0;
796}
797
798static DEFINE_MUTEX(ide_cfg_mtx);
799
800/*
801 * For any present drive:
802 * - allocate the block device queue
803 */
804static int ide_port_setup_devices(ide_hwif_t *hwif)
805{
806 ide_drive_t *drive;
807 int i, j = 0;
808
809 mutex_lock(&ide_cfg_mtx);
810 ide_port_for_each_present_dev(i, drive, hwif) {
811 if (ide_init_queue(drive)) {
812 printk(KERN_ERR "ide: failed to init %s\n",
813 drive->name);
814 drive->dev_flags &= ~IDE_DFLAG_PRESENT;
815 continue;
816 }
817
818 j++;
819 }
820 mutex_unlock(&ide_cfg_mtx);
821
822 return j;
823}
824
825static void ide_host_enable_irqs(struct ide_host *host)
826{
827 ide_hwif_t *hwif;
828 int i;
829
830 ide_host_for_each_port(i, hwif, host) {
831 if (hwif == NULL)
832 continue;
833
834 /* clear any pending IRQs */
835 hwif->tp_ops->read_status(hwif);
836
837 /* unmask IRQs */
838 if (hwif->io_ports.ctl_addr)
839 hwif->tp_ops->write_devctl(hwif, ATA_DEVCTL_OBS);
840 }
841}
842
843/*
844 * This routine sets up the IRQ for an IDE interface.
845 */
846static int init_irq (ide_hwif_t *hwif)
847{
848 struct ide_io_ports *io_ports = &hwif->io_ports;
849 struct ide_host *host = hwif->host;
850 irq_handler_t irq_handler = host->irq_handler;
851 int sa = host->irq_flags;
852
853 if (irq_handler == NULL)
854 irq_handler = ide_intr;
855
856 if (request_irq(hwif->irq, irq_handler, sa, hwif->name, hwif))
857 goto out_up;
858
859#if !defined(__mc68000__)
860 printk(KERN_INFO "%s at 0x%03lx-0x%03lx,0x%03lx on irq %d", hwif->name,
861 io_ports->data_addr, io_ports->status_addr,
862 io_ports->ctl_addr, hwif->irq);
863#else
864 printk(KERN_INFO "%s at 0x%08lx on irq %d", hwif->name,
865 io_ports->data_addr, hwif->irq);
866#endif /* __mc68000__ */
867 if (hwif->host->host_flags & IDE_HFLAG_SERIALIZE)
868 printk(KERN_CONT " (serialized)");
869 printk(KERN_CONT "\n");
870
871 return 0;
872out_up:
873 return 1;
874}
875
876static int ata_lock(dev_t dev, void *data)
877{
878 /* FIXME: we want to pin hwif down */
879 return 0;
880}
881
882static struct kobject *ata_probe(dev_t dev, int *part, void *data)
883{
884 ide_hwif_t *hwif = data;
885 int unit = *part >> PARTN_BITS;
886 ide_drive_t *drive = hwif->devices[unit];
887
888 if ((drive->dev_flags & IDE_DFLAG_PRESENT) == 0)
889 return NULL;
890
891 if (drive->media == ide_disk)
892 request_module("ide-disk");
893 if (drive->media == ide_cdrom || drive->media == ide_optical)
894 request_module("ide-cd");
895 if (drive->media == ide_tape)
896 request_module("ide-tape");
897 if (drive->media == ide_floppy)
898 request_module("ide-floppy");
899
900 return NULL;
901}
902
903static struct kobject *exact_match(dev_t dev, int *part, void *data)
904{
905 struct gendisk *p = data;
906 *part &= (1 << PARTN_BITS) - 1;
907 return &disk_to_dev(p)->kobj;
908}
909
910static int exact_lock(dev_t dev, void *data)
911{
912 struct gendisk *p = data;
913
914 if (!get_disk(p))
915 return -1;
916 return 0;
917}
918
919void ide_register_region(struct gendisk *disk)
920{
921 blk_register_region(MKDEV(disk->major, disk->first_minor),
922 disk->minors, NULL, exact_match, exact_lock, disk);
923}
924
925EXPORT_SYMBOL_GPL(ide_register_region);
926
927void ide_unregister_region(struct gendisk *disk)
928{
929 blk_unregister_region(MKDEV(disk->major, disk->first_minor),
930 disk->minors);
931}
932
933EXPORT_SYMBOL_GPL(ide_unregister_region);
934
935void ide_init_disk(struct gendisk *disk, ide_drive_t *drive)
936{
937 ide_hwif_t *hwif = drive->hwif;
938 unsigned int unit = drive->dn & 1;
939
940 disk->major = hwif->major;
941 disk->first_minor = unit << PARTN_BITS;
942 sprintf(disk->disk_name, "hd%c", 'a' + hwif->index * MAX_DRIVES + unit);
943 disk->queue = drive->queue;
944}
945
946EXPORT_SYMBOL_GPL(ide_init_disk);
947
948static void drive_release_dev (struct device *dev)
949{
950 ide_drive_t *drive = container_of(dev, ide_drive_t, gendev);
951
952 ide_proc_unregister_device(drive);
953
954 blk_cleanup_queue(drive->queue);
955 drive->queue = NULL;
956
957 drive->dev_flags &= ~IDE_DFLAG_PRESENT;
958
959 complete(&drive->gendev_rel_comp);
960}
961
962static int hwif_init(ide_hwif_t *hwif)
963{
964 if (!hwif->irq) {
965 printk(KERN_ERR "%s: disabled, no IRQ\n", hwif->name);
966 return 0;
967 }
968
969 if (register_blkdev(hwif->major, hwif->name))
970 return 0;
971
972 if (!hwif->sg_max_nents)
973 hwif->sg_max_nents = PRD_ENTRIES;
974
975 hwif->sg_table = kmalloc(sizeof(struct scatterlist)*hwif->sg_max_nents,
976 GFP_KERNEL);
977 if (!hwif->sg_table) {
978 printk(KERN_ERR "%s: unable to allocate SG table.\n", hwif->name);
979 goto out;
980 }
981
982 sg_init_table(hwif->sg_table, hwif->sg_max_nents);
983
984 if (init_irq(hwif)) {
985 printk(KERN_ERR "%s: disabled, unable to get IRQ %d\n",
986 hwif->name, hwif->irq);
987 goto out;
988 }
989
990 blk_register_region(MKDEV(hwif->major, 0), MAX_DRIVES << PARTN_BITS,
991 THIS_MODULE, ata_probe, ata_lock, hwif);
992 return 1;
993
994out:
995 unregister_blkdev(hwif->major, hwif->name);
996 return 0;
997}
998
999static void hwif_register_devices(ide_hwif_t *hwif)
1000{
1001 ide_drive_t *drive;
1002 unsigned int i;
1003
1004 ide_port_for_each_present_dev(i, drive, hwif) {
1005 struct device *dev = &drive->gendev;
1006 int ret;
1007
1008 dev_set_name(dev, "%u.%u", hwif->index, i);
1009 dev_set_drvdata(dev, drive);
1010 dev->parent = &hwif->gendev;
1011 dev->bus = &ide_bus_type;
1012 dev->release = drive_release_dev;
1013
1014 ret = device_register(dev);
1015 if (ret < 0)
1016 printk(KERN_WARNING "IDE: %s: device_register error: "
1017 "%d\n", __func__, ret);
1018 }
1019}
1020
1021static void ide_port_init_devices(ide_hwif_t *hwif)
1022{
1023 const struct ide_port_ops *port_ops = hwif->port_ops;
1024 ide_drive_t *drive;
1025 int i;
1026
1027 ide_port_for_each_dev(i, drive, hwif) {
1028 drive->dn = i + hwif->channel * 2;
1029
1030 if (hwif->host_flags & IDE_HFLAG_IO_32BIT)
1031 drive->io_32bit = 1;
1032 if (hwif->host_flags & IDE_HFLAG_NO_IO_32BIT)
1033 drive->dev_flags |= IDE_DFLAG_NO_IO_32BIT;
1034 if (hwif->host_flags & IDE_HFLAG_UNMASK_IRQS)
1035 drive->dev_flags |= IDE_DFLAG_UNMASK;
1036 if (hwif->host_flags & IDE_HFLAG_NO_UNMASK_IRQS)
1037 drive->dev_flags |= IDE_DFLAG_NO_UNMASK;
1038
1039 drive->pio_mode = XFER_PIO_0;
1040
1041 if (port_ops && port_ops->init_dev)
1042 port_ops->init_dev(drive);
1043 }
1044}
1045
1046static void ide_init_port(ide_hwif_t *hwif, unsigned int port,
1047 const struct ide_port_info *d)
1048{
1049 hwif->channel = port;
1050
1051 hwif->chipset = d->chipset ? d->chipset : ide_pci;
1052
1053 if (d->init_iops)
1054 d->init_iops(hwif);
1055
1056 /* ->host_flags may be set by ->init_iops (or even earlier...) */
1057 hwif->host_flags |= d->host_flags;
1058 hwif->pio_mask = d->pio_mask;
1059
1060 if (d->tp_ops)
1061 hwif->tp_ops = d->tp_ops;
1062
1063 /* ->set_pio_mode for DTC2278 is currently limited to port 0 */
1064 if ((hwif->host_flags & IDE_HFLAG_DTC2278) == 0 || hwif->channel == 0)
1065 hwif->port_ops = d->port_ops;
1066
1067 hwif->swdma_mask = d->swdma_mask;
1068 hwif->mwdma_mask = d->mwdma_mask;
1069 hwif->ultra_mask = d->udma_mask;
1070
1071 if ((d->host_flags & IDE_HFLAG_NO_DMA) == 0) {
1072 int rc;
1073
1074 hwif->dma_ops = d->dma_ops;
1075
1076 if (d->init_dma)
1077 rc = d->init_dma(hwif, d);
1078 else
1079 rc = ide_hwif_setup_dma(hwif, d);
1080
1081 if (rc < 0) {
1082 printk(KERN_INFO "%s: DMA disabled\n", hwif->name);
1083
1084 hwif->dma_ops = NULL;
1085 hwif->dma_base = 0;
1086 hwif->swdma_mask = 0;
1087 hwif->mwdma_mask = 0;
1088 hwif->ultra_mask = 0;
1089 }
1090 }
1091
1092 if ((d->host_flags & IDE_HFLAG_SERIALIZE) ||
1093 ((d->host_flags & IDE_HFLAG_SERIALIZE_DMA) && hwif->dma_base))
1094 hwif->host->host_flags |= IDE_HFLAG_SERIALIZE;
1095
1096 if (d->max_sectors)
1097 hwif->rqsize = d->max_sectors;
1098 else {
1099 if ((hwif->host_flags & IDE_HFLAG_NO_LBA48) ||
1100 (hwif->host_flags & IDE_HFLAG_NO_LBA48_DMA))
1101 hwif->rqsize = 256;
1102 else
1103 hwif->rqsize = 65536;
1104 }
1105
1106 /* call chipset specific routine for each enabled port */
1107 if (d->init_hwif)
1108 d->init_hwif(hwif);
1109}
1110
1111static void ide_port_cable_detect(ide_hwif_t *hwif)
1112{
1113 const struct ide_port_ops *port_ops = hwif->port_ops;
1114
1115 if (port_ops && port_ops->cable_detect && (hwif->ultra_mask & 0x78)) {
1116 if (hwif->cbl != ATA_CBL_PATA40_SHORT)
1117 hwif->cbl = port_ops->cable_detect(hwif);
1118 }
1119}
1120
1121static const u8 ide_hwif_to_major[] =
1122 { IDE0_MAJOR, IDE1_MAJOR, IDE2_MAJOR, IDE3_MAJOR, IDE4_MAJOR,
1123 IDE5_MAJOR, IDE6_MAJOR, IDE7_MAJOR, IDE8_MAJOR, IDE9_MAJOR };
1124
1125static void ide_port_init_devices_data(ide_hwif_t *hwif)
1126{
1127 ide_drive_t *drive;
1128 int i;
1129
1130 ide_port_for_each_dev(i, drive, hwif) {
1131 u8 j = (hwif->index * MAX_DRIVES) + i;
1132 u16 *saved_id = drive->id;
1133
1134 memset(drive, 0, sizeof(*drive));
1135 memset(saved_id, 0, SECTOR_SIZE);
1136 drive->id = saved_id;
1137
1138 drive->media = ide_disk;
1139 drive->select = (i << 4) | ATA_DEVICE_OBS;
1140 drive->hwif = hwif;
1141 drive->ready_stat = ATA_DRDY;
1142 drive->bad_wstat = BAD_W_STAT;
1143 drive->special_flags = IDE_SFLAG_RECALIBRATE |
1144 IDE_SFLAG_SET_GEOMETRY;
1145 drive->name[0] = 'h';
1146 drive->name[1] = 'd';
1147 drive->name[2] = 'a' + j;
1148 drive->max_failures = IDE_DEFAULT_MAX_FAILURES;
1149
1150 INIT_LIST_HEAD(&drive->list);
1151 init_completion(&drive->gendev_rel_comp);
1152 }
1153}
1154
1155static void ide_init_port_data(ide_hwif_t *hwif, unsigned int index)
1156{
1157 /* fill in any non-zero initial values */
1158 hwif->index = index;
1159 hwif->major = ide_hwif_to_major[index];
1160
1161 hwif->name[0] = 'i';
1162 hwif->name[1] = 'd';
1163 hwif->name[2] = 'e';
1164 hwif->name[3] = '0' + index;
1165
1166 spin_lock_init(&hwif->lock);
1167
1168 init_timer(&hwif->timer);
1169 hwif->timer.function = &ide_timer_expiry;
1170 hwif->timer.data = (unsigned long)hwif;
1171
1172 init_completion(&hwif->gendev_rel_comp);
1173
1174 hwif->tp_ops = &default_tp_ops;
1175
1176 ide_port_init_devices_data(hwif);
1177}
1178
1179static void ide_init_port_hw(ide_hwif_t *hwif, struct ide_hw *hw)
1180{
1181 memcpy(&hwif->io_ports, &hw->io_ports, sizeof(hwif->io_ports));
1182 hwif->irq = hw->irq;
1183 hwif->dev = hw->dev;
1184 hwif->gendev.parent = hw->parent ? hw->parent : hw->dev;
1185 hwif->config_data = hw->config;
1186}
1187
1188static unsigned int ide_indexes;
1189
1190/**
1191 * ide_find_port_slot - find free port slot
1192 * @d: IDE port info
1193 *
1194 * Return the new port slot index or -ENOENT if we are out of free slots.
1195 */
1196
1197static int ide_find_port_slot(const struct ide_port_info *d)
1198{
1199 int idx = -ENOENT;
1200 u8 bootable = (d && (d->host_flags & IDE_HFLAG_NON_BOOTABLE)) ? 0 : 1;
1201 u8 i = (d && (d->host_flags & IDE_HFLAG_QD_2ND_PORT)) ? 1 : 0;
1202
1203 /*
1204 * Claim an unassigned slot.
1205 *
1206 * Give preference to claiming other slots before claiming ide0/ide1,
1207 * just in case there's another interface yet-to-be-scanned
1208 * which uses ports 0x1f0/0x170 (the ide0/ide1 defaults).
1209 *
1210 * Unless there is a bootable card that does not use the standard
1211 * ports 0x1f0/0x170 (the ide0/ide1 defaults).
1212 */
1213 mutex_lock(&ide_cfg_mtx);
1214 if (bootable) {
1215 if ((ide_indexes | i) != (1 << MAX_HWIFS) - 1)
1216 idx = ffz(ide_indexes | i);
1217 } else {
1218 if ((ide_indexes | 3) != (1 << MAX_HWIFS) - 1)
1219 idx = ffz(ide_indexes | 3);
1220 else if ((ide_indexes & 3) != 3)
1221 idx = ffz(ide_indexes);
1222 }
1223 if (idx >= 0)
1224 ide_indexes |= (1 << idx);
1225 mutex_unlock(&ide_cfg_mtx);
1226
1227 return idx;
1228}
1229
1230static void ide_free_port_slot(int idx)
1231{
1232 mutex_lock(&ide_cfg_mtx);
1233 ide_indexes &= ~(1 << idx);
1234 mutex_unlock(&ide_cfg_mtx);
1235}
1236
1237static void ide_port_free_devices(ide_hwif_t *hwif)
1238{
1239 ide_drive_t *drive;
1240 int i;
1241
1242 ide_port_for_each_dev(i, drive, hwif) {
1243 kfree(drive->id);
1244 kfree(drive);
1245 }
1246}
1247
1248static int ide_port_alloc_devices(ide_hwif_t *hwif, int node)
1249{
1250 int i;
1251
1252 for (i = 0; i < MAX_DRIVES; i++) {
1253 ide_drive_t *drive;
1254
1255 drive = kzalloc_node(sizeof(*drive), GFP_KERNEL, node);
1256 if (drive == NULL)
1257 goto out_nomem;
1258
1259 /*
1260 * In order to keep things simple we have an id
1261 * block for all drives at all times. If the device
1262 * is pre ATA or refuses ATA/ATAPI identify we
1263 * will add faked data to this.
1264 *
1265 * Also note that 0 everywhere means "can't do X"
1266 */
1267 drive->id = kzalloc_node(SECTOR_SIZE, GFP_KERNEL, node);
1268 if (drive->id == NULL)
1269 goto out_nomem;
1270
1271 hwif->devices[i] = drive;
1272 }
1273 return 0;
1274
1275out_nomem:
1276 ide_port_free_devices(hwif);
1277 return -ENOMEM;
1278}
1279
1280struct ide_host *ide_host_alloc(const struct ide_port_info *d,
1281 struct ide_hw **hws, unsigned int n_ports)
1282{
1283 struct ide_host *host;
1284 struct device *dev = hws[0] ? hws[0]->dev : NULL;
1285 int node = dev ? dev_to_node(dev) : -1;
1286 int i;
1287
1288 host = kzalloc_node(sizeof(*host), GFP_KERNEL, node);
1289 if (host == NULL)
1290 return NULL;
1291
1292 for (i = 0; i < n_ports; i++) {
1293 ide_hwif_t *hwif;
1294 int idx;
1295
1296 if (hws[i] == NULL)
1297 continue;
1298
1299 hwif = kzalloc_node(sizeof(*hwif), GFP_KERNEL, node);
1300 if (hwif == NULL)
1301 continue;
1302
1303 if (ide_port_alloc_devices(hwif, node) < 0) {
1304 kfree(hwif);
1305 continue;
1306 }
1307
1308 idx = ide_find_port_slot(d);
1309 if (idx < 0) {
1310 printk(KERN_ERR "%s: no free slot for interface\n",
1311 d ? d->name : "ide");
1312 ide_port_free_devices(hwif);
1313 kfree(hwif);
1314 continue;
1315 }
1316
1317 ide_init_port_data(hwif, idx);
1318
1319 hwif->host = host;
1320
1321 host->ports[i] = hwif;
1322 host->n_ports++;
1323 }
1324
1325 if (host->n_ports == 0) {
1326 kfree(host);
1327 return NULL;
1328 }
1329
1330 host->dev[0] = dev;
1331
1332 if (d) {
1333 host->init_chipset = d->init_chipset;
1334 host->get_lock = d->get_lock;
1335 host->release_lock = d->release_lock;
1336 host->host_flags = d->host_flags;
1337 host->irq_flags = d->irq_flags;
1338 }
1339
1340 return host;
1341}
1342EXPORT_SYMBOL_GPL(ide_host_alloc);
1343
1344static void ide_port_free(ide_hwif_t *hwif)
1345{
1346 ide_port_free_devices(hwif);
1347 ide_free_port_slot(hwif->index);
1348 kfree(hwif);
1349}
1350
1351static void ide_disable_port(ide_hwif_t *hwif)
1352{
1353 struct ide_host *host = hwif->host;
1354 int i;
1355
1356 printk(KERN_INFO "%s: disabling port\n", hwif->name);
1357
1358 for (i = 0; i < MAX_HOST_PORTS; i++) {
1359 if (host->ports[i] == hwif) {
1360 host->ports[i] = NULL;
1361 host->n_ports--;
1362 }
1363 }
1364
1365 ide_port_free(hwif);
1366}
1367
1368int ide_host_register(struct ide_host *host, const struct ide_port_info *d,
1369 struct ide_hw **hws)
1370{
1371 ide_hwif_t *hwif, *mate = NULL;
1372 int i, j = 0;
1373
1374 ide_host_for_each_port(i, hwif, host) {
1375 if (hwif == NULL) {
1376 mate = NULL;
1377 continue;
1378 }
1379
1380 ide_init_port_hw(hwif, hws[i]);
1381 ide_port_apply_params(hwif);
1382
1383 if ((i & 1) && mate) {
1384 hwif->mate = mate;
1385 mate->mate = hwif;
1386 }
1387
1388 mate = (i & 1) ? NULL : hwif;
1389
1390 ide_init_port(hwif, i & 1, d);
1391 ide_port_cable_detect(hwif);
1392
1393 hwif->port_flags |= IDE_PFLAG_PROBING;
1394
1395 ide_port_init_devices(hwif);
1396 }
1397
1398 ide_host_for_each_port(i, hwif, host) {
1399 if (hwif == NULL)
1400 continue;
1401
1402 if (ide_probe_port(hwif) == 0)
1403 hwif->present = 1;
1404
1405 hwif->port_flags &= ~IDE_PFLAG_PROBING;
1406
1407 if ((hwif->host_flags & IDE_HFLAG_4DRIVES) == 0 ||
1408 hwif->mate == NULL || hwif->mate->present == 0) {
1409 if (ide_register_port(hwif)) {
1410 ide_disable_port(hwif);
1411 continue;
1412 }
1413 }
1414
1415 if (hwif->present)
1416 ide_port_tune_devices(hwif);
1417 }
1418
1419 ide_host_enable_irqs(host);
1420
1421 ide_host_for_each_port(i, hwif, host) {
1422 if (hwif == NULL)
1423 continue;
1424
1425 if (hwif_init(hwif) == 0) {
1426 printk(KERN_INFO "%s: failed to initialize IDE "
1427 "interface\n", hwif->name);
1428 device_unregister(&hwif->gendev);
1429 ide_disable_port(hwif);
1430 continue;
1431 }
1432
1433 if (hwif->present)
1434 if (ide_port_setup_devices(hwif) == 0) {
1435 hwif->present = 0;
1436 continue;
1437 }
1438
1439 j++;
1440
1441 ide_acpi_init_port(hwif);
1442
1443 if (hwif->present)
1444 ide_acpi_port_init_devices(hwif);
1445 }
1446
1447 ide_host_for_each_port(i, hwif, host) {
1448 if (hwif == NULL)
1449 continue;
1450
1451 ide_sysfs_register_port(hwif);
1452 ide_proc_register_port(hwif);
1453
1454 if (hwif->present) {
1455 ide_proc_port_register_devices(hwif);
1456 hwif_register_devices(hwif);
1457 }
1458 }
1459
1460 return j ? 0 : -1;
1461}
1462EXPORT_SYMBOL_GPL(ide_host_register);
1463
1464int ide_host_add(const struct ide_port_info *d, struct ide_hw **hws,
1465 unsigned int n_ports, struct ide_host **hostp)
1466{
1467 struct ide_host *host;
1468 int rc;
1469
1470 host = ide_host_alloc(d, hws, n_ports);
1471 if (host == NULL)
1472 return -ENOMEM;
1473
1474 rc = ide_host_register(host, d, hws);
1475 if (rc) {
1476 ide_host_free(host);
1477 return rc;
1478 }
1479
1480 if (hostp)
1481 *hostp = host;
1482
1483 return 0;
1484}
1485EXPORT_SYMBOL_GPL(ide_host_add);
1486
1487static void __ide_port_unregister_devices(ide_hwif_t *hwif)
1488{
1489 ide_drive_t *drive;
1490 int i;
1491
1492 ide_port_for_each_present_dev(i, drive, hwif) {
1493 device_unregister(&drive->gendev);
1494 wait_for_completion(&drive->gendev_rel_comp);
1495 }
1496}
1497
1498void ide_port_unregister_devices(ide_hwif_t *hwif)
1499{
1500 mutex_lock(&ide_cfg_mtx);
1501 __ide_port_unregister_devices(hwif);
1502 hwif->present = 0;
1503 ide_port_init_devices_data(hwif);
1504 mutex_unlock(&ide_cfg_mtx);
1505}
1506EXPORT_SYMBOL_GPL(ide_port_unregister_devices);
1507
1508/**
1509 * ide_unregister - free an IDE interface
1510 * @hwif: IDE interface
1511 *
1512 * Perform the final unregister of an IDE interface.
1513 *
1514 * Locking:
1515 * The caller must not hold the IDE locks.
1516 *
1517 * It is up to the caller to be sure there is no pending I/O here,
1518 * and that the interface will not be reopened (present/vanishing
1519 * locking isn't yet done BTW).
1520 */
1521
1522static void ide_unregister(ide_hwif_t *hwif)
1523{
1524 BUG_ON(in_interrupt());
1525 BUG_ON(irqs_disabled());
1526
1527 mutex_lock(&ide_cfg_mtx);
1528
1529 if (hwif->present) {
1530 __ide_port_unregister_devices(hwif);
1531 hwif->present = 0;
1532 }
1533
1534 ide_proc_unregister_port(hwif);
1535
1536 free_irq(hwif->irq, hwif);
1537
1538 device_unregister(hwif->portdev);
1539 device_unregister(&hwif->gendev);
1540 wait_for_completion(&hwif->gendev_rel_comp);
1541
1542 /*
1543 * Remove us from the kernel's knowledge
1544 */
1545 blk_unregister_region(MKDEV(hwif->major, 0), MAX_DRIVES<<PARTN_BITS);
1546 kfree(hwif->sg_table);
1547 unregister_blkdev(hwif->major, hwif->name);
1548
1549 ide_release_dma_engine(hwif);
1550
1551 mutex_unlock(&ide_cfg_mtx);
1552}
1553
1554void ide_host_free(struct ide_host *host)
1555{
1556 ide_hwif_t *hwif;
1557 int i;
1558
1559 ide_host_for_each_port(i, hwif, host) {
1560 if (hwif)
1561 ide_port_free(hwif);
1562 }
1563
1564 kfree(host);
1565}
1566EXPORT_SYMBOL_GPL(ide_host_free);
1567
1568void ide_host_remove(struct ide_host *host)
1569{
1570 ide_hwif_t *hwif;
1571 int i;
1572
1573 ide_host_for_each_port(i, hwif, host) {
1574 if (hwif)
1575 ide_unregister(hwif);
1576 }
1577
1578 ide_host_free(host);
1579}
1580EXPORT_SYMBOL_GPL(ide_host_remove);
1581
1582void ide_port_scan(ide_hwif_t *hwif)
1583{
1584 int rc;
1585
1586 ide_port_apply_params(hwif);
1587 ide_port_cable_detect(hwif);
1588
1589 hwif->port_flags |= IDE_PFLAG_PROBING;
1590
1591 ide_port_init_devices(hwif);
1592
1593 rc = ide_probe_port(hwif);
1594
1595 hwif->port_flags &= ~IDE_PFLAG_PROBING;
1596
1597 if (rc < 0)
1598 return;
1599
1600 hwif->present = 1;
1601
1602 ide_port_tune_devices(hwif);
1603 ide_port_setup_devices(hwif);
1604 ide_acpi_port_init_devices(hwif);
1605 hwif_register_devices(hwif);
1606 ide_proc_port_register_devices(hwif);
1607}
1608EXPORT_SYMBOL_GPL(ide_port_scan);