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ide: add ->dev and ->host_priv fields to struct ide_host
[deliverable/linux.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 drive->id->cyls = drive->cyl;
54 drive->id->heads = drive->head;
55 drive->id->sectors = drive->sect;
56 drive->id->cur_cyls = drive->cyl;
57 drive->id->cur_heads = drive->head;
58 drive->id->cur_sectors = drive->sect;
59 }
60
61 static void ide_disk_init_chs(ide_drive_t *drive)
62 {
63 struct hd_driveid *id = drive->id;
64
65 /* Extract geometry if we did not already have one for the drive */
66 if (!drive->cyl || !drive->head || !drive->sect) {
67 drive->cyl = drive->bios_cyl = id->cyls;
68 drive->head = drive->bios_head = id->heads;
69 drive->sect = drive->bios_sect = id->sectors;
70 }
71
72 /* Handle logical geometry translation by the drive */
73 if ((id->field_valid & 1) && id->cur_cyls &&
74 id->cur_heads && (id->cur_heads <= 16) && id->cur_sectors) {
75 drive->cyl = id->cur_cyls;
76 drive->head = id->cur_heads;
77 drive->sect = id->cur_sectors;
78 }
79
80 /* Use physical geometry if what we have still makes no sense */
81 if (drive->head > 16 && id->heads && id->heads <= 16) {
82 drive->cyl = id->cyls;
83 drive->head = id->heads;
84 drive->sect = id->sectors;
85 }
86 }
87
88 static void ide_disk_init_mult_count(ide_drive_t *drive)
89 {
90 struct hd_driveid *id = drive->id;
91
92 drive->mult_count = 0;
93 if (id->max_multsect) {
94 #ifdef CONFIG_IDEDISK_MULTI_MODE
95 id->multsect = ((id->max_multsect/2) > 1) ? id->max_multsect : 0;
96 id->multsect_valid = id->multsect ? 1 : 0;
97 drive->mult_req = id->multsect_valid ? id->max_multsect : 0;
98 drive->special.b.set_multmode = drive->mult_req ? 1 : 0;
99 #else /* original, pre IDE-NFG, per request of AC */
100 drive->mult_req = 0;
101 if (drive->mult_req > id->max_multsect)
102 drive->mult_req = id->max_multsect;
103 if (drive->mult_req || ((id->multsect_valid & 1) && id->multsect))
104 drive->special.b.set_multmode = 1;
105 #endif
106 }
107 }
108
109 /**
110 * do_identify - identify a drive
111 * @drive: drive to identify
112 * @cmd: command used
113 *
114 * Called when we have issued a drive identify command to
115 * read and parse the results. This function is run with
116 * interrupts disabled.
117 */
118
119 static inline void do_identify (ide_drive_t *drive, u8 cmd)
120 {
121 ide_hwif_t *hwif = HWIF(drive);
122 int bswap = 1;
123 struct hd_driveid *id;
124
125 id = drive->id;
126 /* read 512 bytes of id info */
127 hwif->tp_ops->input_data(drive, NULL, id, SECTOR_SIZE);
128
129 drive->id_read = 1;
130 local_irq_enable();
131 #ifdef DEBUG
132 printk(KERN_INFO "%s: dumping identify data\n", drive->name);
133 ide_dump_identify((u8 *)id);
134 #endif
135 ide_fix_driveid(id);
136
137 #if defined (CONFIG_SCSI_EATA_PIO) || defined (CONFIG_SCSI_EATA)
138 /*
139 * EATA SCSI controllers do a hardware ATA emulation:
140 * Ignore them if there is a driver for them available.
141 */
142 if ((id->model[0] == 'P' && id->model[1] == 'M') ||
143 (id->model[0] == 'S' && id->model[1] == 'K')) {
144 printk("%s: EATA SCSI HBA %.10s\n", drive->name, id->model);
145 goto err_misc;
146 }
147 #endif /* CONFIG_SCSI_EATA || CONFIG_SCSI_EATA_PIO */
148
149 /*
150 * WIN_IDENTIFY returns little-endian info,
151 * WIN_PIDENTIFY *usually* returns little-endian info.
152 */
153 if (cmd == WIN_PIDENTIFY) {
154 if ((id->model[0] == 'N' && id->model[1] == 'E') /* NEC */
155 || (id->model[0] == 'F' && id->model[1] == 'X') /* Mitsumi */
156 || (id->model[0] == 'P' && id->model[1] == 'i'))/* Pioneer */
157 /* Vertos drives may still be weird */
158 bswap ^= 1;
159 }
160 ide_fixstring(id->model, sizeof(id->model), bswap);
161 ide_fixstring(id->fw_rev, sizeof(id->fw_rev), bswap);
162 ide_fixstring(id->serial_no, sizeof(id->serial_no), bswap);
163
164 /* we depend on this a lot! */
165 id->model[sizeof(id->model)-1] = '\0';
166
167 if (strstr(id->model, "E X A B Y T E N E S T"))
168 goto err_misc;
169
170 printk("%s: %s, ", drive->name, id->model);
171 drive->present = 1;
172 drive->dead = 0;
173
174 /*
175 * Check for an ATAPI device
176 */
177 if (cmd == WIN_PIDENTIFY) {
178 u8 type = (id->config >> 8) & 0x1f;
179 printk("ATAPI ");
180 switch (type) {
181 case ide_floppy:
182 if (!strstr(id->model, "CD-ROM")) {
183 if (!strstr(id->model, "oppy") &&
184 !strstr(id->model, "poyp") &&
185 !strstr(id->model, "ZIP"))
186 printk("cdrom or floppy?, assuming ");
187 if (drive->media != ide_cdrom) {
188 printk ("FLOPPY");
189 drive->removable = 1;
190 break;
191 }
192 }
193 /* Early cdrom models used zero */
194 type = ide_cdrom;
195 case ide_cdrom:
196 drive->removable = 1;
197 #ifdef CONFIG_PPC
198 /* kludge for Apple PowerBook internal zip */
199 if (!strstr(id->model, "CD-ROM") &&
200 strstr(id->model, "ZIP")) {
201 printk ("FLOPPY");
202 type = ide_floppy;
203 break;
204 }
205 #endif
206 printk ("CD/DVD-ROM");
207 break;
208 case ide_tape:
209 printk ("TAPE");
210 break;
211 case ide_optical:
212 printk ("OPTICAL");
213 drive->removable = 1;
214 break;
215 default:
216 printk("UNKNOWN (type %d)", type);
217 break;
218 }
219 printk (" drive\n");
220 drive->media = type;
221 /* an ATAPI device ignores DRDY */
222 drive->ready_stat = 0;
223 return;
224 }
225
226 /*
227 * Not an ATAPI device: looks like a "regular" hard disk
228 */
229
230 /*
231 * 0x848a = CompactFlash device
232 * These are *not* removable in Linux definition of the term
233 */
234
235 if ((id->config != 0x848a) && (id->config & (1<<7)))
236 drive->removable = 1;
237
238 drive->media = ide_disk;
239 printk("%s DISK drive\n", (id->config == 0x848a) ? "CFA" : "ATA" );
240
241 return;
242
243 err_misc:
244 kfree(id);
245 drive->present = 0;
246 return;
247 }
248
249 /**
250 * actual_try_to_identify - send ata/atapi identify
251 * @drive: drive to identify
252 * @cmd: command to use
253 *
254 * try_to_identify() sends an ATA(PI) IDENTIFY request to a drive
255 * and waits for a response. It also monitors irqs while this is
256 * happening, in hope of automatically determining which one is
257 * being used by the interface.
258 *
259 * Returns: 0 device was identified
260 * 1 device timed-out (no response to identify request)
261 * 2 device aborted the command (refused to identify itself)
262 */
263
264 static int actual_try_to_identify (ide_drive_t *drive, u8 cmd)
265 {
266 ide_hwif_t *hwif = HWIF(drive);
267 struct ide_io_ports *io_ports = &hwif->io_ports;
268 const struct ide_tp_ops *tp_ops = hwif->tp_ops;
269 int use_altstatus = 0, rc;
270 unsigned long timeout;
271 u8 s = 0, a = 0;
272
273 /* take a deep breath */
274 msleep(50);
275
276 if (io_ports->ctl_addr) {
277 a = tp_ops->read_altstatus(hwif);
278 s = tp_ops->read_status(hwif);
279 if ((a ^ s) & ~INDEX_STAT)
280 /* ancient Seagate drives, broken interfaces */
281 printk(KERN_INFO "%s: probing with STATUS(0x%02x) "
282 "instead of ALTSTATUS(0x%02x)\n",
283 drive->name, s, a);
284 else
285 /* use non-intrusive polling */
286 use_altstatus = 1;
287 }
288
289 /* set features register for atapi
290 * identify command to be sure of reply
291 */
292 if (cmd == WIN_PIDENTIFY) {
293 ide_task_t task;
294
295 memset(&task, 0, sizeof(task));
296 /* disable DMA & overlap */
297 task.tf_flags = IDE_TFLAG_OUT_FEATURE;
298
299 tp_ops->tf_load(drive, &task);
300 }
301
302 /* ask drive for ID */
303 tp_ops->exec_command(hwif, cmd);
304
305 timeout = ((cmd == WIN_IDENTIFY) ? WAIT_WORSTCASE : WAIT_PIDENTIFY) / 2;
306 timeout += jiffies;
307 do {
308 if (time_after(jiffies, timeout)) {
309 /* drive timed-out */
310 return 1;
311 }
312 /* give drive a breather */
313 msleep(50);
314 s = use_altstatus ? tp_ops->read_altstatus(hwif)
315 : tp_ops->read_status(hwif);
316 } while (s & BUSY_STAT);
317
318 /* wait for IRQ and DRQ_STAT */
319 msleep(50);
320 s = tp_ops->read_status(hwif);
321
322 if (OK_STAT(s, DRQ_STAT, BAD_R_STAT)) {
323 unsigned long flags;
324
325 /* local CPU only; some systems need this */
326 local_irq_save(flags);
327 /* drive returned ID */
328 do_identify(drive, cmd);
329 /* drive responded with ID */
330 rc = 0;
331 /* clear drive IRQ */
332 (void)tp_ops->read_status(hwif);
333 local_irq_restore(flags);
334 } else {
335 /* drive refused ID */
336 rc = 2;
337 }
338 return rc;
339 }
340
341 /**
342 * try_to_identify - try to identify a drive
343 * @drive: drive to probe
344 * @cmd: command to use
345 *
346 * Issue the identify command and then do IRQ probing to
347 * complete the identification when needed by finding the
348 * IRQ the drive is attached to
349 */
350
351 static int try_to_identify (ide_drive_t *drive, u8 cmd)
352 {
353 ide_hwif_t *hwif = HWIF(drive);
354 const struct ide_tp_ops *tp_ops = hwif->tp_ops;
355 int retval;
356 int autoprobe = 0;
357 unsigned long cookie = 0;
358
359 /*
360 * Disable device irq unless we need to
361 * probe for it. Otherwise we'll get spurious
362 * interrupts during the identify-phase that
363 * the irq handler isn't expecting.
364 */
365 if (hwif->io_ports.ctl_addr) {
366 if (!hwif->irq) {
367 autoprobe = 1;
368 cookie = probe_irq_on();
369 }
370 tp_ops->set_irq(hwif, autoprobe);
371 }
372
373 retval = actual_try_to_identify(drive, cmd);
374
375 if (autoprobe) {
376 int irq;
377
378 tp_ops->set_irq(hwif, 0);
379 /* clear drive IRQ */
380 (void)tp_ops->read_status(hwif);
381 udelay(5);
382 irq = probe_irq_off(cookie);
383 if (!hwif->irq) {
384 if (irq > 0) {
385 hwif->irq = irq;
386 } else {
387 /* Mmmm.. multiple IRQs..
388 * don't know which was ours
389 */
390 printk("%s: IRQ probe failed (0x%lx)\n",
391 drive->name, cookie);
392 }
393 }
394 }
395 return retval;
396 }
397
398 static int ide_busy_sleep(ide_hwif_t *hwif)
399 {
400 unsigned long timeout = jiffies + WAIT_WORSTCASE;
401 u8 stat;
402
403 do {
404 msleep(50);
405 stat = hwif->tp_ops->read_status(hwif);
406 if ((stat & BUSY_STAT) == 0)
407 return 0;
408 } while (time_before(jiffies, timeout));
409
410 return 1;
411 }
412
413 static u8 ide_read_device(ide_drive_t *drive)
414 {
415 ide_task_t task;
416
417 memset(&task, 0, sizeof(task));
418 task.tf_flags = IDE_TFLAG_IN_DEVICE;
419
420 drive->hwif->tp_ops->tf_read(drive, &task);
421
422 return task.tf.device;
423 }
424
425 /**
426 * do_probe - probe an IDE device
427 * @drive: drive to probe
428 * @cmd: command to use
429 *
430 * do_probe() has the difficult job of finding a drive if it exists,
431 * without getting hung up if it doesn't exist, without trampling on
432 * ethernet cards, and without leaving any IRQs dangling to haunt us later.
433 *
434 * If a drive is "known" to exist (from CMOS or kernel parameters),
435 * but does not respond right away, the probe will "hang in there"
436 * for the maximum wait time (about 30 seconds), otherwise it will
437 * exit much more quickly.
438 *
439 * Returns: 0 device was identified
440 * 1 device timed-out (no response to identify request)
441 * 2 device aborted the command (refused to identify itself)
442 * 3 bad status from device (possible for ATAPI drives)
443 * 4 probe was not attempted because failure was obvious
444 */
445
446 static int do_probe (ide_drive_t *drive, u8 cmd)
447 {
448 ide_hwif_t *hwif = HWIF(drive);
449 const struct ide_tp_ops *tp_ops = hwif->tp_ops;
450 int rc;
451 u8 stat;
452
453 if (drive->present) {
454 /* avoid waiting for inappropriate probes */
455 if ((drive->media != ide_disk) && (cmd == WIN_IDENTIFY))
456 return 4;
457 }
458 #ifdef DEBUG
459 printk("probing for %s: present=%d, media=%d, probetype=%s\n",
460 drive->name, drive->present, drive->media,
461 (cmd == WIN_IDENTIFY) ? "ATA" : "ATAPI");
462 #endif
463
464 /* needed for some systems
465 * (e.g. crw9624 as drive0 with disk as slave)
466 */
467 msleep(50);
468 SELECT_DRIVE(drive);
469 msleep(50);
470
471 if (ide_read_device(drive) != drive->select.all && !drive->present) {
472 if (drive->select.b.unit != 0) {
473 /* exit with drive0 selected */
474 SELECT_DRIVE(&hwif->drives[0]);
475 /* allow BUSY_STAT to assert & clear */
476 msleep(50);
477 }
478 /* no i/f present: mmm.. this should be a 4 -ml */
479 return 3;
480 }
481
482 stat = tp_ops->read_status(hwif);
483
484 if (OK_STAT(stat, READY_STAT, BUSY_STAT) ||
485 drive->present || cmd == WIN_PIDENTIFY) {
486 /* send cmd and wait */
487 if ((rc = try_to_identify(drive, cmd))) {
488 /* failed: try again */
489 rc = try_to_identify(drive,cmd);
490 }
491
492 stat = tp_ops->read_status(hwif);
493
494 if (stat == (BUSY_STAT | READY_STAT))
495 return 4;
496
497 if (rc == 1 && cmd == WIN_PIDENTIFY) {
498 printk(KERN_ERR "%s: no response (status = 0x%02x), "
499 "resetting drive\n", drive->name, stat);
500 msleep(50);
501 SELECT_DRIVE(drive);
502 msleep(50);
503 tp_ops->exec_command(hwif, WIN_SRST);
504 (void)ide_busy_sleep(hwif);
505 rc = try_to_identify(drive, cmd);
506 }
507
508 /* ensure drive IRQ is clear */
509 stat = tp_ops->read_status(hwif);
510
511 if (rc == 1)
512 printk(KERN_ERR "%s: no response (status = 0x%02x)\n",
513 drive->name, stat);
514 } else {
515 /* not present or maybe ATAPI */
516 rc = 3;
517 }
518 if (drive->select.b.unit != 0) {
519 /* exit with drive0 selected */
520 SELECT_DRIVE(&hwif->drives[0]);
521 msleep(50);
522 /* ensure drive irq is clear */
523 (void)tp_ops->read_status(hwif);
524 }
525 return rc;
526 }
527
528 /*
529 *
530 */
531 static void enable_nest (ide_drive_t *drive)
532 {
533 ide_hwif_t *hwif = HWIF(drive);
534 const struct ide_tp_ops *tp_ops = hwif->tp_ops;
535 u8 stat;
536
537 printk("%s: enabling %s -- ", hwif->name, drive->id->model);
538 SELECT_DRIVE(drive);
539 msleep(50);
540 tp_ops->exec_command(hwif, EXABYTE_ENABLE_NEST);
541
542 if (ide_busy_sleep(hwif)) {
543 printk(KERN_CONT "failed (timeout)\n");
544 return;
545 }
546
547 msleep(50);
548
549 stat = tp_ops->read_status(hwif);
550
551 if (!OK_STAT(stat, 0, BAD_STAT))
552 printk(KERN_CONT "failed (status = 0x%02x)\n", stat);
553 else
554 printk(KERN_CONT "success\n");
555
556 /* if !(success||timed-out) */
557 if (do_probe(drive, WIN_IDENTIFY) >= 2) {
558 /* look for ATAPI device */
559 (void) do_probe(drive, WIN_PIDENTIFY);
560 }
561 }
562
563 /**
564 * probe_for_drives - upper level drive probe
565 * @drive: drive to probe for
566 *
567 * probe_for_drive() tests for existence of a given drive using do_probe()
568 * and presents things to the user as needed.
569 *
570 * Returns: 0 no device was found
571 * 1 device was found (note: drive->present might
572 * still be 0)
573 */
574
575 static inline u8 probe_for_drive (ide_drive_t *drive)
576 {
577 /*
578 * In order to keep things simple we have an id
579 * block for all drives at all times. If the device
580 * is pre ATA or refuses ATA/ATAPI identify we
581 * will add faked data to this.
582 *
583 * Also note that 0 everywhere means "can't do X"
584 */
585
586 drive->id = kzalloc(SECTOR_WORDS *4, GFP_KERNEL);
587 drive->id_read = 0;
588 if(drive->id == NULL)
589 {
590 printk(KERN_ERR "ide: out of memory for id data.\n");
591 return 0;
592 }
593 strcpy(drive->id->model, "UNKNOWN");
594
595 /* skip probing? */
596 if (!drive->noprobe)
597 {
598 /* if !(success||timed-out) */
599 if (do_probe(drive, WIN_IDENTIFY) >= 2) {
600 /* look for ATAPI device */
601 (void) do_probe(drive, WIN_PIDENTIFY);
602 }
603 if (!drive->present)
604 /* drive not found */
605 return 0;
606 if (strstr(drive->id->model, "E X A B Y T E N E S T"))
607 enable_nest(drive);
608
609 /* identification failed? */
610 if (!drive->id_read) {
611 if (drive->media == ide_disk) {
612 printk(KERN_INFO "%s: non-IDE drive, CHS=%d/%d/%d\n",
613 drive->name, drive->cyl,
614 drive->head, drive->sect);
615 } else if (drive->media == ide_cdrom) {
616 printk(KERN_INFO "%s: ATAPI cdrom (?)\n", drive->name);
617 } else {
618 /* nuke it */
619 printk(KERN_WARNING "%s: Unknown device on bus refused identification. Ignoring.\n", drive->name);
620 drive->present = 0;
621 }
622 }
623 /* drive was found */
624 }
625 if(!drive->present)
626 return 0;
627 /* The drive wasn't being helpful. Add generic info only */
628 if (drive->id_read == 0) {
629 generic_id(drive);
630 return 1;
631 }
632
633 if (drive->media == ide_disk) {
634 ide_disk_init_chs(drive);
635 ide_disk_init_mult_count(drive);
636 }
637
638 return drive->present;
639 }
640
641 static void hwif_release_dev(struct device *dev)
642 {
643 ide_hwif_t *hwif = container_of(dev, ide_hwif_t, gendev);
644
645 complete(&hwif->gendev_rel_comp);
646 }
647
648 static int ide_register_port(ide_hwif_t *hwif)
649 {
650 int ret;
651
652 /* register with global device tree */
653 strlcpy(hwif->gendev.bus_id,hwif->name,BUS_ID_SIZE);
654 hwif->gendev.driver_data = hwif;
655 if (hwif->gendev.parent == NULL) {
656 if (hwif->dev)
657 hwif->gendev.parent = hwif->dev;
658 else
659 /* Would like to do = &device_legacy */
660 hwif->gendev.parent = NULL;
661 }
662 hwif->gendev.release = hwif_release_dev;
663 ret = device_register(&hwif->gendev);
664 if (ret < 0) {
665 printk(KERN_WARNING "IDE: %s: device_register error: %d\n",
666 __func__, ret);
667 goto out;
668 }
669
670 hwif->portdev = device_create_drvdata(ide_port_class, &hwif->gendev,
671 MKDEV(0, 0), hwif, hwif->name);
672 if (IS_ERR(hwif->portdev)) {
673 ret = PTR_ERR(hwif->portdev);
674 device_unregister(&hwif->gendev);
675 }
676 out:
677 return ret;
678 }
679
680 /**
681 * ide_port_wait_ready - wait for port to become ready
682 * @hwif: IDE port
683 *
684 * This is needed on some PPCs and a bunch of BIOS-less embedded
685 * platforms. Typical cases are:
686 *
687 * - The firmware hard reset the disk before booting the kernel,
688 * the drive is still doing it's poweron-reset sequence, that
689 * can take up to 30 seconds.
690 *
691 * - The firmware does nothing (or no firmware), the device is
692 * still in POST state (same as above actually).
693 *
694 * - Some CD/DVD/Writer combo drives tend to drive the bus during
695 * their reset sequence even when they are non-selected slave
696 * devices, thus preventing discovery of the main HD.
697 *
698 * Doing this wait-for-non-busy should not harm any existing
699 * configuration and fix some issues like the above.
700 *
701 * BenH.
702 *
703 * Returns 0 on success, error code (< 0) otherwise.
704 */
705
706 static int ide_port_wait_ready(ide_hwif_t *hwif)
707 {
708 int unit, rc;
709
710 printk(KERN_DEBUG "Probing IDE interface %s...\n", hwif->name);
711
712 /* Let HW settle down a bit from whatever init state we
713 * come from */
714 mdelay(2);
715
716 /* Wait for BSY bit to go away, spec timeout is 30 seconds,
717 * I know of at least one disk who takes 31 seconds, I use 35
718 * here to be safe
719 */
720 rc = ide_wait_not_busy(hwif, 35000);
721 if (rc)
722 return rc;
723
724 /* Now make sure both master & slave are ready */
725 for (unit = 0; unit < MAX_DRIVES; unit++) {
726 ide_drive_t *drive = &hwif->drives[unit];
727
728 /* Ignore disks that we will not probe for later. */
729 if (!drive->noprobe || drive->present) {
730 SELECT_DRIVE(drive);
731 hwif->tp_ops->set_irq(hwif, 1);
732 mdelay(2);
733 rc = ide_wait_not_busy(hwif, 35000);
734 if (rc)
735 goto out;
736 } else
737 printk(KERN_DEBUG "%s: ide_wait_not_busy() skipped\n",
738 drive->name);
739 }
740 out:
741 /* Exit function with master reselected (let's be sane) */
742 if (unit)
743 SELECT_DRIVE(&hwif->drives[0]);
744
745 return rc;
746 }
747
748 /**
749 * ide_undecoded_slave - look for bad CF adapters
750 * @drive1: drive
751 *
752 * Analyse the drives on the interface and attempt to decide if we
753 * have the same drive viewed twice. This occurs with crap CF adapters
754 * and PCMCIA sometimes.
755 */
756
757 void ide_undecoded_slave(ide_drive_t *drive1)
758 {
759 ide_drive_t *drive0 = &drive1->hwif->drives[0];
760
761 if ((drive1->dn & 1) == 0 || drive0->present == 0)
762 return;
763
764 /* If the models don't match they are not the same product */
765 if (strcmp(drive0->id->model, drive1->id->model))
766 return;
767
768 /* Serial numbers do not match */
769 if (strncmp(drive0->id->serial_no, drive1->id->serial_no, 20))
770 return;
771
772 /* No serial number, thankfully very rare for CF */
773 if (drive0->id->serial_no[0] == 0)
774 return;
775
776 /* Appears to be an IDE flash adapter with decode bugs */
777 printk(KERN_WARNING "ide-probe: ignoring undecoded slave\n");
778
779 drive1->present = 0;
780 }
781
782 EXPORT_SYMBOL_GPL(ide_undecoded_slave);
783
784 static int ide_probe_port(ide_hwif_t *hwif)
785 {
786 unsigned long flags;
787 unsigned int irqd;
788 int unit, rc = -ENODEV;
789
790 BUG_ON(hwif->present);
791
792 if (hwif->drives[0].noprobe && hwif->drives[1].noprobe)
793 return -EACCES;
794
795 /*
796 * We must always disable IRQ, as probe_for_drive will assert IRQ, but
797 * we'll install our IRQ driver much later...
798 */
799 irqd = hwif->irq;
800 if (irqd)
801 disable_irq(hwif->irq);
802
803 local_irq_set(flags);
804
805 if (ide_port_wait_ready(hwif) == -EBUSY)
806 printk(KERN_DEBUG "%s: Wait for ready failed before probe !\n", hwif->name);
807
808 /*
809 * Second drive should only exist if first drive was found,
810 * but a lot of cdrom drives are configured as single slaves.
811 */
812 for (unit = 0; unit < MAX_DRIVES; ++unit) {
813 ide_drive_t *drive = &hwif->drives[unit];
814 drive->dn = (hwif->channel ? 2 : 0) + unit;
815 (void) probe_for_drive(drive);
816 if (drive->present)
817 rc = 0;
818 }
819
820 local_irq_restore(flags);
821
822 /*
823 * Use cached IRQ number. It might be (and is...) changed by probe
824 * code above
825 */
826 if (irqd)
827 enable_irq(irqd);
828
829 return rc;
830 }
831
832 static void ide_port_tune_devices(ide_hwif_t *hwif)
833 {
834 const struct ide_port_ops *port_ops = hwif->port_ops;
835 int unit;
836
837 for (unit = 0; unit < MAX_DRIVES; unit++) {
838 ide_drive_t *drive = &hwif->drives[unit];
839
840 if (drive->present && port_ops && port_ops->quirkproc)
841 port_ops->quirkproc(drive);
842 }
843
844 for (unit = 0; unit < MAX_DRIVES; ++unit) {
845 ide_drive_t *drive = &hwif->drives[unit];
846
847 if (drive->present) {
848 ide_set_max_pio(drive);
849
850 drive->nice1 = 1;
851
852 if (hwif->dma_ops)
853 ide_set_dma(drive);
854 }
855 }
856
857 for (unit = 0; unit < MAX_DRIVES; ++unit) {
858 ide_drive_t *drive = &hwif->drives[unit];
859
860 if (hwif->host_flags & IDE_HFLAG_NO_IO_32BIT)
861 drive->no_io_32bit = 1;
862 else
863 drive->no_io_32bit = drive->id->dword_io ? 1 : 0;
864 }
865 }
866
867 #if MAX_HWIFS > 1
868 /*
869 * save_match() is used to simplify logic in init_irq() below.
870 *
871 * A loophole here is that we may not know about a particular
872 * hwif's irq until after that hwif is actually probed/initialized..
873 * This could be a problem for the case where an hwif is on a
874 * dual interface that requires serialization (eg. cmd640) and another
875 * hwif using one of the same irqs is initialized beforehand.
876 *
877 * This routine detects and reports such situations, but does not fix them.
878 */
879 static void save_match(ide_hwif_t *hwif, ide_hwif_t *new, ide_hwif_t **match)
880 {
881 ide_hwif_t *m = *match;
882
883 if (m && m->hwgroup && m->hwgroup != new->hwgroup) {
884 if (!new->hwgroup)
885 return;
886 printk("%s: potential irq problem with %s and %s\n",
887 hwif->name, new->name, m->name);
888 }
889 if (!m || m->irq != hwif->irq) /* don't undo a prior perfect match */
890 *match = new;
891 }
892 #endif /* MAX_HWIFS > 1 */
893
894 /*
895 * init request queue
896 */
897 static int ide_init_queue(ide_drive_t *drive)
898 {
899 struct request_queue *q;
900 ide_hwif_t *hwif = HWIF(drive);
901 int max_sectors = 256;
902 int max_sg_entries = PRD_ENTRIES;
903
904 /*
905 * Our default set up assumes the normal IDE case,
906 * that is 64K segmenting, standard PRD setup
907 * and LBA28. Some drivers then impose their own
908 * limits and LBA48 we could raise it but as yet
909 * do not.
910 */
911
912 q = blk_init_queue_node(do_ide_request, &ide_lock, hwif_to_node(hwif));
913 if (!q)
914 return 1;
915
916 q->queuedata = drive;
917 blk_queue_segment_boundary(q, 0xffff);
918
919 if (hwif->rqsize < max_sectors)
920 max_sectors = hwif->rqsize;
921 blk_queue_max_sectors(q, max_sectors);
922
923 #ifdef CONFIG_PCI
924 /* When we have an IOMMU, we may have a problem where pci_map_sg()
925 * creates segments that don't completely match our boundary
926 * requirements and thus need to be broken up again. Because it
927 * doesn't align properly either, we may actually have to break up
928 * to more segments than what was we got in the first place, a max
929 * worst case is twice as many.
930 * This will be fixed once we teach pci_map_sg() about our boundary
931 * requirements, hopefully soon. *FIXME*
932 */
933 if (!PCI_DMA_BUS_IS_PHYS)
934 max_sg_entries >>= 1;
935 #endif /* CONFIG_PCI */
936
937 blk_queue_max_hw_segments(q, max_sg_entries);
938 blk_queue_max_phys_segments(q, max_sg_entries);
939
940 /* assign drive queue */
941 drive->queue = q;
942
943 /* needs drive->queue to be set */
944 ide_toggle_bounce(drive, 1);
945
946 return 0;
947 }
948
949 static void ide_add_drive_to_hwgroup(ide_drive_t *drive)
950 {
951 ide_hwgroup_t *hwgroup = drive->hwif->hwgroup;
952
953 spin_lock_irq(&ide_lock);
954 if (!hwgroup->drive) {
955 /* first drive for hwgroup. */
956 drive->next = drive;
957 hwgroup->drive = drive;
958 hwgroup->hwif = HWIF(hwgroup->drive);
959 } else {
960 drive->next = hwgroup->drive->next;
961 hwgroup->drive->next = drive;
962 }
963 spin_unlock_irq(&ide_lock);
964 }
965
966 /*
967 * For any present drive:
968 * - allocate the block device queue
969 * - link drive into the hwgroup
970 */
971 static void ide_port_setup_devices(ide_hwif_t *hwif)
972 {
973 int i;
974
975 mutex_lock(&ide_cfg_mtx);
976 for (i = 0; i < MAX_DRIVES; i++) {
977 ide_drive_t *drive = &hwif->drives[i];
978
979 if (!drive->present)
980 continue;
981
982 if (ide_init_queue(drive)) {
983 printk(KERN_ERR "ide: failed to init %s\n",
984 drive->name);
985 continue;
986 }
987
988 ide_add_drive_to_hwgroup(drive);
989 }
990 mutex_unlock(&ide_cfg_mtx);
991 }
992
993 static ide_hwif_t *ide_ports[MAX_HWIFS];
994
995 void ide_remove_port_from_hwgroup(ide_hwif_t *hwif)
996 {
997 ide_hwgroup_t *hwgroup = hwif->hwgroup;
998
999 ide_ports[hwif->index] = NULL;
1000
1001 spin_lock_irq(&ide_lock);
1002 /*
1003 * Remove us from the hwgroup, and free
1004 * the hwgroup if we were the only member
1005 */
1006 if (hwif->next == hwif) {
1007 BUG_ON(hwgroup->hwif != hwif);
1008 kfree(hwgroup);
1009 } else {
1010 /* There is another interface in hwgroup.
1011 * Unlink us, and set hwgroup->drive and ->hwif to
1012 * something sane.
1013 */
1014 ide_hwif_t *g = hwgroup->hwif;
1015
1016 while (g->next != hwif)
1017 g = g->next;
1018 g->next = hwif->next;
1019 if (hwgroup->hwif == hwif) {
1020 /* Chose a random hwif for hwgroup->hwif.
1021 * It's guaranteed that there are no drives
1022 * left in the hwgroup.
1023 */
1024 BUG_ON(hwgroup->drive != NULL);
1025 hwgroup->hwif = g;
1026 }
1027 BUG_ON(hwgroup->hwif == hwif);
1028 }
1029 spin_unlock_irq(&ide_lock);
1030 }
1031
1032 /*
1033 * This routine sets up the irq for an ide interface, and creates a new
1034 * hwgroup for the irq/hwif if none was previously assigned.
1035 *
1036 * Much of the code is for correctly detecting/handling irq sharing
1037 * and irq serialization situations. This is somewhat complex because
1038 * it handles static as well as dynamic (PCMCIA) IDE interfaces.
1039 */
1040 static int init_irq (ide_hwif_t *hwif)
1041 {
1042 struct ide_io_ports *io_ports = &hwif->io_ports;
1043 unsigned int index;
1044 ide_hwgroup_t *hwgroup;
1045 ide_hwif_t *match = NULL;
1046
1047
1048 BUG_ON(in_interrupt());
1049 BUG_ON(irqs_disabled());
1050 BUG_ON(hwif == NULL);
1051
1052 mutex_lock(&ide_cfg_mtx);
1053 hwif->hwgroup = NULL;
1054 #if MAX_HWIFS > 1
1055 /*
1056 * Group up with any other hwifs that share our irq(s).
1057 */
1058 for (index = 0; index < MAX_HWIFS; index++) {
1059 ide_hwif_t *h = ide_ports[index];
1060
1061 if (h && h->hwgroup) { /* scan only initialized ports */
1062 if (hwif->irq == h->irq) {
1063 hwif->sharing_irq = h->sharing_irq = 1;
1064 if (hwif->chipset != ide_pci ||
1065 h->chipset != ide_pci) {
1066 save_match(hwif, h, &match);
1067 }
1068 }
1069 if (hwif->serialized) {
1070 if (hwif->mate && hwif->mate->irq == h->irq)
1071 save_match(hwif, h, &match);
1072 }
1073 if (h->serialized) {
1074 if (h->mate && hwif->irq == h->mate->irq)
1075 save_match(hwif, h, &match);
1076 }
1077 }
1078 }
1079 #endif /* MAX_HWIFS > 1 */
1080 /*
1081 * If we are still without a hwgroup, then form a new one
1082 */
1083 if (match) {
1084 hwgroup = match->hwgroup;
1085 hwif->hwgroup = hwgroup;
1086 /*
1087 * Link us into the hwgroup.
1088 * This must be done early, do ensure that unexpected_intr
1089 * can find the hwif and prevent irq storms.
1090 * No drives are attached to the new hwif, choose_drive
1091 * can't do anything stupid (yet).
1092 * Add ourself as the 2nd entry to the hwgroup->hwif
1093 * linked list, the first entry is the hwif that owns
1094 * hwgroup->handler - do not change that.
1095 */
1096 spin_lock_irq(&ide_lock);
1097 hwif->next = hwgroup->hwif->next;
1098 hwgroup->hwif->next = hwif;
1099 BUG_ON(hwif->next == hwif);
1100 spin_unlock_irq(&ide_lock);
1101 } else {
1102 hwgroup = kmalloc_node(sizeof(*hwgroup), GFP_KERNEL|__GFP_ZERO,
1103 hwif_to_node(hwif));
1104 if (hwgroup == NULL)
1105 goto out_up;
1106
1107 hwif->hwgroup = hwgroup;
1108 hwgroup->hwif = hwif->next = hwif;
1109
1110 init_timer(&hwgroup->timer);
1111 hwgroup->timer.function = &ide_timer_expiry;
1112 hwgroup->timer.data = (unsigned long) hwgroup;
1113 }
1114
1115 ide_ports[hwif->index] = hwif;
1116
1117 /*
1118 * Allocate the irq, if not already obtained for another hwif
1119 */
1120 if (!match || match->irq != hwif->irq) {
1121 int sa = 0;
1122 #if defined(__mc68000__)
1123 sa = IRQF_SHARED;
1124 #endif /* __mc68000__ */
1125
1126 if (IDE_CHIPSET_IS_PCI(hwif->chipset))
1127 sa = IRQF_SHARED;
1128
1129 if (io_ports->ctl_addr)
1130 hwif->tp_ops->set_irq(hwif, 1);
1131
1132 if (request_irq(hwif->irq,&ide_intr,sa,hwif->name,hwgroup))
1133 goto out_unlink;
1134 }
1135
1136 if (!hwif->rqsize) {
1137 if ((hwif->host_flags & IDE_HFLAG_NO_LBA48) ||
1138 (hwif->host_flags & IDE_HFLAG_NO_LBA48_DMA))
1139 hwif->rqsize = 256;
1140 else
1141 hwif->rqsize = 65536;
1142 }
1143
1144 #if !defined(__mc68000__)
1145 printk("%s at 0x%03lx-0x%03lx,0x%03lx on irq %d", hwif->name,
1146 io_ports->data_addr, io_ports->status_addr,
1147 io_ports->ctl_addr, hwif->irq);
1148 #else
1149 printk("%s at 0x%08lx on irq %d", hwif->name,
1150 io_ports->data_addr, hwif->irq);
1151 #endif /* __mc68000__ */
1152 if (match)
1153 printk(" (%sed with %s)",
1154 hwif->sharing_irq ? "shar" : "serializ", match->name);
1155 printk("\n");
1156
1157 mutex_unlock(&ide_cfg_mtx);
1158 return 0;
1159 out_unlink:
1160 ide_remove_port_from_hwgroup(hwif);
1161 out_up:
1162 mutex_unlock(&ide_cfg_mtx);
1163 return 1;
1164 }
1165
1166 static int ata_lock(dev_t dev, void *data)
1167 {
1168 /* FIXME: we want to pin hwif down */
1169 return 0;
1170 }
1171
1172 static struct kobject *ata_probe(dev_t dev, int *part, void *data)
1173 {
1174 ide_hwif_t *hwif = data;
1175 int unit = *part >> PARTN_BITS;
1176 ide_drive_t *drive = &hwif->drives[unit];
1177 if (!drive->present)
1178 return NULL;
1179
1180 if (drive->media == ide_disk)
1181 request_module("ide-disk");
1182 if (drive->scsi)
1183 request_module("ide-scsi");
1184 if (drive->media == ide_cdrom || drive->media == ide_optical)
1185 request_module("ide-cd");
1186 if (drive->media == ide_tape)
1187 request_module("ide-tape");
1188 if (drive->media == ide_floppy)
1189 request_module("ide-floppy");
1190
1191 return NULL;
1192 }
1193
1194 static struct kobject *exact_match(dev_t dev, int *part, void *data)
1195 {
1196 struct gendisk *p = data;
1197 *part &= (1 << PARTN_BITS) - 1;
1198 return &p->dev.kobj;
1199 }
1200
1201 static int exact_lock(dev_t dev, void *data)
1202 {
1203 struct gendisk *p = data;
1204
1205 if (!get_disk(p))
1206 return -1;
1207 return 0;
1208 }
1209
1210 void ide_register_region(struct gendisk *disk)
1211 {
1212 blk_register_region(MKDEV(disk->major, disk->first_minor),
1213 disk->minors, NULL, exact_match, exact_lock, disk);
1214 }
1215
1216 EXPORT_SYMBOL_GPL(ide_register_region);
1217
1218 void ide_unregister_region(struct gendisk *disk)
1219 {
1220 blk_unregister_region(MKDEV(disk->major, disk->first_minor),
1221 disk->minors);
1222 }
1223
1224 EXPORT_SYMBOL_GPL(ide_unregister_region);
1225
1226 void ide_init_disk(struct gendisk *disk, ide_drive_t *drive)
1227 {
1228 ide_hwif_t *hwif = drive->hwif;
1229 unsigned int unit = (drive->select.all >> 4) & 1;
1230
1231 disk->major = hwif->major;
1232 disk->first_minor = unit << PARTN_BITS;
1233 sprintf(disk->disk_name, "hd%c", 'a' + hwif->index * MAX_DRIVES + unit);
1234 disk->queue = drive->queue;
1235 }
1236
1237 EXPORT_SYMBOL_GPL(ide_init_disk);
1238
1239 static void ide_remove_drive_from_hwgroup(ide_drive_t *drive)
1240 {
1241 ide_hwgroup_t *hwgroup = drive->hwif->hwgroup;
1242
1243 if (drive == drive->next) {
1244 /* special case: last drive from hwgroup. */
1245 BUG_ON(hwgroup->drive != drive);
1246 hwgroup->drive = NULL;
1247 } else {
1248 ide_drive_t *walk;
1249
1250 walk = hwgroup->drive;
1251 while (walk->next != drive)
1252 walk = walk->next;
1253 walk->next = drive->next;
1254 if (hwgroup->drive == drive) {
1255 hwgroup->drive = drive->next;
1256 hwgroup->hwif = hwgroup->drive->hwif;
1257 }
1258 }
1259 BUG_ON(hwgroup->drive == drive);
1260 }
1261
1262 static void drive_release_dev (struct device *dev)
1263 {
1264 ide_drive_t *drive = container_of(dev, ide_drive_t, gendev);
1265
1266 ide_proc_unregister_device(drive);
1267
1268 spin_lock_irq(&ide_lock);
1269 ide_remove_drive_from_hwgroup(drive);
1270 kfree(drive->id);
1271 drive->id = NULL;
1272 drive->present = 0;
1273 /* Messed up locking ... */
1274 spin_unlock_irq(&ide_lock);
1275 blk_cleanup_queue(drive->queue);
1276 spin_lock_irq(&ide_lock);
1277 drive->queue = NULL;
1278 spin_unlock_irq(&ide_lock);
1279
1280 complete(&drive->gendev_rel_comp);
1281 }
1282
1283 static int hwif_init(ide_hwif_t *hwif)
1284 {
1285 int old_irq;
1286
1287 if (!hwif->irq) {
1288 hwif->irq = __ide_default_irq(hwif->io_ports.data_addr);
1289 if (!hwif->irq) {
1290 printk("%s: DISABLED, NO IRQ\n", hwif->name);
1291 return 0;
1292 }
1293 }
1294
1295 if (register_blkdev(hwif->major, hwif->name))
1296 return 0;
1297
1298 if (!hwif->sg_max_nents)
1299 hwif->sg_max_nents = PRD_ENTRIES;
1300
1301 hwif->sg_table = kmalloc(sizeof(struct scatterlist)*hwif->sg_max_nents,
1302 GFP_KERNEL);
1303 if (!hwif->sg_table) {
1304 printk(KERN_ERR "%s: unable to allocate SG table.\n", hwif->name);
1305 goto out;
1306 }
1307
1308 sg_init_table(hwif->sg_table, hwif->sg_max_nents);
1309
1310 if (init_irq(hwif) == 0)
1311 goto done;
1312
1313 old_irq = hwif->irq;
1314 /*
1315 * It failed to initialise. Find the default IRQ for
1316 * this port and try that.
1317 */
1318 hwif->irq = __ide_default_irq(hwif->io_ports.data_addr);
1319 if (!hwif->irq) {
1320 printk("%s: Disabled unable to get IRQ %d.\n",
1321 hwif->name, old_irq);
1322 goto out;
1323 }
1324 if (init_irq(hwif)) {
1325 printk("%s: probed IRQ %d and default IRQ %d failed.\n",
1326 hwif->name, old_irq, hwif->irq);
1327 goto out;
1328 }
1329 printk("%s: probed IRQ %d failed, using default.\n",
1330 hwif->name, hwif->irq);
1331
1332 done:
1333 blk_register_region(MKDEV(hwif->major, 0), MAX_DRIVES << PARTN_BITS,
1334 THIS_MODULE, ata_probe, ata_lock, hwif);
1335 return 1;
1336
1337 out:
1338 unregister_blkdev(hwif->major, hwif->name);
1339 return 0;
1340 }
1341
1342 static void hwif_register_devices(ide_hwif_t *hwif)
1343 {
1344 unsigned int i;
1345
1346 for (i = 0; i < MAX_DRIVES; i++) {
1347 ide_drive_t *drive = &hwif->drives[i];
1348 struct device *dev = &drive->gendev;
1349 int ret;
1350
1351 if (!drive->present)
1352 continue;
1353
1354 ide_add_generic_settings(drive);
1355
1356 snprintf(dev->bus_id, BUS_ID_SIZE, "%u.%u", hwif->index, i);
1357 dev->parent = &hwif->gendev;
1358 dev->bus = &ide_bus_type;
1359 dev->driver_data = drive;
1360 dev->release = drive_release_dev;
1361
1362 ret = device_register(dev);
1363 if (ret < 0)
1364 printk(KERN_WARNING "IDE: %s: device_register error: "
1365 "%d\n", __func__, ret);
1366 }
1367 }
1368
1369 static void ide_port_init_devices(ide_hwif_t *hwif)
1370 {
1371 const struct ide_port_ops *port_ops = hwif->port_ops;
1372 int i;
1373
1374 for (i = 0; i < MAX_DRIVES; i++) {
1375 ide_drive_t *drive = &hwif->drives[i];
1376
1377 if (hwif->host_flags & IDE_HFLAG_IO_32BIT)
1378 drive->io_32bit = 1;
1379 if (hwif->host_flags & IDE_HFLAG_UNMASK_IRQS)
1380 drive->unmask = 1;
1381 if (hwif->host_flags & IDE_HFLAG_NO_UNMASK_IRQS)
1382 drive->no_unmask = 1;
1383
1384 if (port_ops && port_ops->init_dev)
1385 port_ops->init_dev(drive);
1386 }
1387 }
1388
1389 static void ide_init_port(ide_hwif_t *hwif, unsigned int port,
1390 const struct ide_port_info *d)
1391 {
1392 hwif->channel = port;
1393
1394 if (d->chipset)
1395 hwif->chipset = d->chipset;
1396
1397 if (d->init_iops)
1398 d->init_iops(hwif);
1399
1400 if ((!hwif->irq && (d->host_flags & IDE_HFLAG_LEGACY_IRQS)) ||
1401 (d->host_flags & IDE_HFLAG_FORCE_LEGACY_IRQS))
1402 hwif->irq = port ? 15 : 14;
1403
1404 /* ->host_flags may be set by ->init_iops (or even earlier...) */
1405 hwif->host_flags |= d->host_flags;
1406 hwif->pio_mask = d->pio_mask;
1407
1408 if (d->tp_ops)
1409 hwif->tp_ops = d->tp_ops;
1410
1411 /* ->set_pio_mode for DTC2278 is currently limited to port 0 */
1412 if (hwif->chipset != ide_dtc2278 || hwif->channel == 0)
1413 hwif->port_ops = d->port_ops;
1414
1415 hwif->swdma_mask = d->swdma_mask;
1416 hwif->mwdma_mask = d->mwdma_mask;
1417 hwif->ultra_mask = d->udma_mask;
1418
1419 if ((d->host_flags & IDE_HFLAG_NO_DMA) == 0) {
1420 int rc;
1421
1422 if (d->init_dma)
1423 rc = d->init_dma(hwif, d);
1424 else
1425 rc = ide_hwif_setup_dma(hwif, d);
1426
1427 if (rc < 0) {
1428 printk(KERN_INFO "%s: DMA disabled\n", hwif->name);
1429 hwif->dma_base = 0;
1430 hwif->swdma_mask = 0;
1431 hwif->mwdma_mask = 0;
1432 hwif->ultra_mask = 0;
1433 } else if (d->dma_ops)
1434 hwif->dma_ops = d->dma_ops;
1435 }
1436
1437 if ((d->host_flags & IDE_HFLAG_SERIALIZE) ||
1438 ((d->host_flags & IDE_HFLAG_SERIALIZE_DMA) && hwif->dma_base)) {
1439 if (hwif->mate)
1440 hwif->mate->serialized = hwif->serialized = 1;
1441 }
1442
1443 if (d->host_flags & IDE_HFLAG_RQSIZE_256)
1444 hwif->rqsize = 256;
1445
1446 /* call chipset specific routine for each enabled port */
1447 if (d->init_hwif)
1448 d->init_hwif(hwif);
1449 }
1450
1451 static void ide_port_cable_detect(ide_hwif_t *hwif)
1452 {
1453 const struct ide_port_ops *port_ops = hwif->port_ops;
1454
1455 if (port_ops && port_ops->cable_detect && (hwif->ultra_mask & 0x78)) {
1456 if (hwif->cbl != ATA_CBL_PATA40_SHORT)
1457 hwif->cbl = port_ops->cable_detect(hwif);
1458 }
1459 }
1460
1461 static ssize_t store_delete_devices(struct device *portdev,
1462 struct device_attribute *attr,
1463 const char *buf, size_t n)
1464 {
1465 ide_hwif_t *hwif = dev_get_drvdata(portdev);
1466
1467 if (strncmp(buf, "1", n))
1468 return -EINVAL;
1469
1470 ide_port_unregister_devices(hwif);
1471
1472 return n;
1473 };
1474
1475 static DEVICE_ATTR(delete_devices, S_IWUSR, NULL, store_delete_devices);
1476
1477 static ssize_t store_scan(struct device *portdev,
1478 struct device_attribute *attr,
1479 const char *buf, size_t n)
1480 {
1481 ide_hwif_t *hwif = dev_get_drvdata(portdev);
1482
1483 if (strncmp(buf, "1", n))
1484 return -EINVAL;
1485
1486 ide_port_unregister_devices(hwif);
1487 ide_port_scan(hwif);
1488
1489 return n;
1490 };
1491
1492 static DEVICE_ATTR(scan, S_IWUSR, NULL, store_scan);
1493
1494 static struct device_attribute *ide_port_attrs[] = {
1495 &dev_attr_delete_devices,
1496 &dev_attr_scan,
1497 NULL
1498 };
1499
1500 static int ide_sysfs_register_port(ide_hwif_t *hwif)
1501 {
1502 int i, rc;
1503
1504 for (i = 0; ide_port_attrs[i]; i++) {
1505 rc = device_create_file(hwif->portdev, ide_port_attrs[i]);
1506 if (rc)
1507 break;
1508 }
1509
1510 return rc;
1511 }
1512
1513 static unsigned int ide_indexes;
1514
1515 /**
1516 * ide_find_port_slot - find free port slot
1517 * @d: IDE port info
1518 *
1519 * Return the new port slot index or -ENOENT if we are out of free slots.
1520 */
1521
1522 static int ide_find_port_slot(const struct ide_port_info *d)
1523 {
1524 int idx = -ENOENT;
1525 u8 bootable = (d && (d->host_flags & IDE_HFLAG_NON_BOOTABLE)) ? 0 : 1;
1526 u8 i = (d && (d->host_flags & IDE_HFLAG_QD_2ND_PORT)) ? 1 : 0;;
1527
1528 /*
1529 * Claim an unassigned slot.
1530 *
1531 * Give preference to claiming other slots before claiming ide0/ide1,
1532 * just in case there's another interface yet-to-be-scanned
1533 * which uses ports 0x1f0/0x170 (the ide0/ide1 defaults).
1534 *
1535 * Unless there is a bootable card that does not use the standard
1536 * ports 0x1f0/0x170 (the ide0/ide1 defaults).
1537 */
1538 mutex_lock(&ide_cfg_mtx);
1539 if (MAX_HWIFS == 1) {
1540 if (ide_indexes == 0 && i == 0)
1541 idx = 1;
1542 } else {
1543 if (bootable) {
1544 if ((ide_indexes | i) != (1 << MAX_HWIFS) - 1)
1545 idx = ffz(ide_indexes | i);
1546 } else {
1547 if ((ide_indexes | 3) != (1 << MAX_HWIFS) - 1)
1548 idx = ffz(ide_indexes | 3);
1549 else if ((ide_indexes & 3) != 3)
1550 idx = ffz(ide_indexes);
1551 }
1552 }
1553 if (idx >= 0)
1554 ide_indexes |= (1 << idx);
1555 mutex_unlock(&ide_cfg_mtx);
1556
1557 return idx;
1558 }
1559
1560 static void ide_free_port_slot(int idx)
1561 {
1562 mutex_lock(&ide_cfg_mtx);
1563 ide_indexes &= ~(1 << idx);
1564 mutex_unlock(&ide_cfg_mtx);
1565 }
1566
1567 struct ide_host *ide_host_alloc_all(const struct ide_port_info *d,
1568 hw_regs_t **hws)
1569 {
1570 struct ide_host *host;
1571 int i;
1572
1573 host = kzalloc(sizeof(*host), GFP_KERNEL);
1574 if (host == NULL)
1575 return NULL;
1576
1577 for (i = 0; i < MAX_HWIFS; i++) {
1578 ide_hwif_t *hwif;
1579 int idx;
1580
1581 if (hws[i] == NULL)
1582 continue;
1583
1584 hwif = kzalloc(sizeof(*hwif), GFP_KERNEL);
1585 if (hwif == NULL)
1586 continue;
1587
1588 idx = ide_find_port_slot(d);
1589 if (idx < 0) {
1590 printk(KERN_ERR "%s: no free slot for interface\n",
1591 d ? d->name : "ide");
1592 kfree(hwif);
1593 continue;
1594 }
1595
1596 ide_init_port_data(hwif, idx);
1597
1598 host->ports[i] = hwif;
1599 host->n_ports++;
1600 }
1601
1602 if (host->n_ports == 0) {
1603 kfree(host);
1604 return NULL;
1605 }
1606
1607 if (hws[0])
1608 host->dev[0] = hws[0]->dev;
1609
1610 return host;
1611 }
1612 EXPORT_SYMBOL_GPL(ide_host_alloc_all);
1613
1614 struct ide_host *ide_host_alloc(const struct ide_port_info *d, hw_regs_t **hws)
1615 {
1616 hw_regs_t *hws_all[MAX_HWIFS];
1617 int i;
1618
1619 for (i = 0; i < MAX_HWIFS; i++)
1620 hws_all[i] = (i < 4) ? hws[i] : NULL;
1621
1622 return ide_host_alloc_all(d, hws_all);
1623 }
1624 EXPORT_SYMBOL_GPL(ide_host_alloc);
1625
1626 int ide_host_register(struct ide_host *host, const struct ide_port_info *d,
1627 hw_regs_t **hws)
1628 {
1629 ide_hwif_t *hwif, *mate = NULL;
1630 int i, j = 0;
1631
1632 for (i = 0; i < MAX_HWIFS; i++) {
1633 hwif = host->ports[i];
1634
1635 if (hwif == NULL) {
1636 mate = NULL;
1637 continue;
1638 }
1639
1640 ide_init_port_hw(hwif, hws[i]);
1641 ide_port_apply_params(hwif);
1642
1643 if (d == NULL) {
1644 mate = NULL;
1645 continue;
1646 }
1647
1648 if ((i & 1) && mate) {
1649 hwif->mate = mate;
1650 mate->mate = hwif;
1651 }
1652
1653 mate = (i & 1) ? NULL : hwif;
1654
1655 ide_init_port(hwif, i & 1, d);
1656 ide_port_cable_detect(hwif);
1657 ide_port_init_devices(hwif);
1658 }
1659
1660 for (i = 0; i < MAX_HWIFS; i++) {
1661 hwif = host->ports[i];
1662
1663 if (hwif == NULL)
1664 continue;
1665
1666 if (ide_probe_port(hwif) == 0)
1667 hwif->present = 1;
1668
1669 if (hwif->chipset != ide_4drives || !hwif->mate ||
1670 !hwif->mate->present)
1671 ide_register_port(hwif);
1672
1673 if (hwif->present)
1674 ide_port_tune_devices(hwif);
1675 }
1676
1677 for (i = 0; i < MAX_HWIFS; i++) {
1678 hwif = host->ports[i];
1679
1680 if (hwif == NULL)
1681 continue;
1682
1683 if (hwif_init(hwif) == 0) {
1684 printk(KERN_INFO "%s: failed to initialize IDE "
1685 "interface\n", hwif->name);
1686 hwif->present = 0;
1687 continue;
1688 }
1689
1690 j++;
1691
1692 if (hwif->present)
1693 ide_port_setup_devices(hwif);
1694
1695 ide_acpi_init(hwif);
1696
1697 if (hwif->present)
1698 ide_acpi_port_init_devices(hwif);
1699 }
1700
1701 for (i = 0; i < MAX_HWIFS; i++) {
1702 hwif = host->ports[i];
1703
1704 if (hwif == NULL)
1705 continue;
1706
1707 if (hwif->chipset == ide_unknown)
1708 hwif->chipset = ide_generic;
1709
1710 if (hwif->present)
1711 hwif_register_devices(hwif);
1712 }
1713
1714 for (i = 0; i < MAX_HWIFS; i++) {
1715 hwif = host->ports[i];
1716
1717 if (hwif == NULL)
1718 continue;
1719
1720 ide_sysfs_register_port(hwif);
1721 ide_proc_register_port(hwif);
1722
1723 if (hwif->present)
1724 ide_proc_port_register_devices(hwif);
1725 }
1726
1727 return j ? 0 : -1;
1728 }
1729 EXPORT_SYMBOL_GPL(ide_host_register);
1730
1731 int ide_host_add(const struct ide_port_info *d, hw_regs_t **hws,
1732 struct ide_host **hostp)
1733 {
1734 struct ide_host *host;
1735 int rc;
1736
1737 host = ide_host_alloc(d, hws);
1738 if (host == NULL)
1739 return -ENOMEM;
1740
1741 rc = ide_host_register(host, d, hws);
1742 if (rc) {
1743 ide_host_free(host);
1744 return rc;
1745 }
1746
1747 if (hostp)
1748 *hostp = host;
1749
1750 return 0;
1751 }
1752 EXPORT_SYMBOL_GPL(ide_host_add);
1753
1754 void ide_host_free(struct ide_host *host)
1755 {
1756 ide_hwif_t *hwif;
1757 int i;
1758
1759 for (i = 0; i < MAX_HWIFS; i++) {
1760 hwif = host->ports[i];
1761
1762 if (hwif == NULL)
1763 continue;
1764
1765 ide_free_port_slot(hwif->index);
1766 kfree(hwif);
1767 }
1768
1769 kfree(host);
1770 }
1771 EXPORT_SYMBOL_GPL(ide_host_free);
1772
1773 void ide_host_remove(struct ide_host *host)
1774 {
1775 int i;
1776
1777 for (i = 0; i < MAX_HWIFS; i++) {
1778 if (host->ports[i])
1779 ide_unregister(host->ports[i]);
1780 }
1781
1782 ide_host_free(host);
1783 }
1784 EXPORT_SYMBOL_GPL(ide_host_remove);
1785
1786 void ide_port_scan(ide_hwif_t *hwif)
1787 {
1788 ide_port_apply_params(hwif);
1789 ide_port_cable_detect(hwif);
1790 ide_port_init_devices(hwif);
1791
1792 if (ide_probe_port(hwif) < 0)
1793 return;
1794
1795 hwif->present = 1;
1796
1797 ide_port_tune_devices(hwif);
1798 ide_acpi_port_init_devices(hwif);
1799 ide_port_setup_devices(hwif);
1800 hwif_register_devices(hwif);
1801 ide_proc_port_register_devices(hwif);
1802 }
1803 EXPORT_SYMBOL_GPL(ide_port_scan);
1804
1805 static void ide_legacy_init_one(hw_regs_t **hws, hw_regs_t *hw,
1806 u8 port_no, const struct ide_port_info *d,
1807 unsigned long config)
1808 {
1809 unsigned long base, ctl;
1810 int irq;
1811
1812 if (port_no == 0) {
1813 base = 0x1f0;
1814 ctl = 0x3f6;
1815 irq = 14;
1816 } else {
1817 base = 0x170;
1818 ctl = 0x376;
1819 irq = 15;
1820 }
1821
1822 if (!request_region(base, 8, d->name)) {
1823 printk(KERN_ERR "%s: I/O resource 0x%lX-0x%lX not free.\n",
1824 d->name, base, base + 7);
1825 return;
1826 }
1827
1828 if (!request_region(ctl, 1, d->name)) {
1829 printk(KERN_ERR "%s: I/O resource 0x%lX not free.\n",
1830 d->name, ctl);
1831 release_region(base, 8);
1832 return;
1833 }
1834
1835 ide_std_init_ports(hw, base, ctl);
1836 hw->irq = irq;
1837 hw->chipset = d->chipset;
1838 hw->config = config;
1839
1840 hws[port_no] = hw;
1841 }
1842
1843 int ide_legacy_device_add(const struct ide_port_info *d, unsigned long config)
1844 {
1845 hw_regs_t hw[2], *hws[] = { NULL, NULL, NULL, NULL };
1846
1847 memset(&hw, 0, sizeof(hw));
1848
1849 if ((d->host_flags & IDE_HFLAG_QD_2ND_PORT) == 0)
1850 ide_legacy_init_one(hws, &hw[0], 0, d, config);
1851 ide_legacy_init_one(hws, &hw[1], 1, d, config);
1852
1853 if (hws[0] == NULL && hws[1] == NULL &&
1854 (d->host_flags & IDE_HFLAG_SINGLE))
1855 return -ENOENT;
1856
1857 return ide_host_add(d, hws, NULL);
1858 }
1859 EXPORT_SYMBOL_GPL(ide_legacy_device_add);
Linux kernel - Deliverables
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