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