]> git.proxmox.com Git - mirror_ubuntu-artful-kernel.git/blob - drivers/ide/ide-probe.c
projects / mirror_ubuntu-artful-kernel.git / blob
? search:
summary | shortlog | log | commit | commitdiff | tree
blame | history | raw | HEAD
ide: add device flags
[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 /**
105 * do_identify - identify a drive
106 * @drive: drive to identify
107 * @cmd: command used
108 *
109 * Called when we have issued a drive identify command to
110 * read and parse the results. This function is run with
111 * interrupts disabled.
112 */
113
114 static inline void do_identify (ide_drive_t *drive, u8 cmd)
115 {
116 ide_hwif_t *hwif = HWIF(drive);
117 u16 *id = drive->id;
118 char *m = (char *)&id[ATA_ID_PROD];
119 int bswap = 1, is_cfa;
120
121 /* read 512 bytes of id info */
122 hwif->tp_ops->input_data(drive, NULL, id, SECTOR_SIZE);
123
124 drive->dev_flags |= IDE_DFLAG_ID_READ;
125
126 local_irq_enable();
127 #ifdef DEBUG
128 printk(KERN_INFO "%s: dumping identify data\n", drive->name);
129 ide_dump_identify((u8 *)id);
130 #endif
131 ide_fix_driveid(id);
132
133 /*
134 * ATA_CMD_ID_ATA returns little-endian info,
135 * ATA_CMD_ID_ATAPI *usually* returns little-endian info.
136 */
137 if (cmd == ATA_CMD_ID_ATAPI) {
138 if ((m[0] == 'N' && m[1] == 'E') || /* NEC */
139 (m[0] == 'F' && m[1] == 'X') || /* Mitsumi */
140 (m[0] == 'P' && m[1] == 'i')) /* Pioneer */
141 /* Vertos drives may still be weird */
142 bswap ^= 1;
143 }
144
145 ide_fixstring(m, ATA_ID_PROD_LEN, bswap);
146 ide_fixstring((char *)&id[ATA_ID_FW_REV], ATA_ID_FW_REV_LEN, bswap);
147 ide_fixstring((char *)&id[ATA_ID_SERNO], ATA_ID_SERNO_LEN, bswap);
148
149 /* we depend on this a lot! */
150 m[ATA_ID_PROD_LEN - 1] = '\0';
151
152 if (strstr(m, "E X A B Y T E N E S T"))
153 goto err_misc;
154
155 printk(KERN_INFO "%s: %s, ", drive->name, m);
156
157 drive->dev_flags |= IDE_DFLAG_PRESENT;
158 drive->dev_flags &= ~IDE_DFLAG_DEAD;
159
160 /*
161 * Check for an ATAPI device
162 */
163 if (cmd == ATA_CMD_ID_ATAPI) {
164 u8 type = (id[ATA_ID_CONFIG] >> 8) & 0x1f;
165
166 printk(KERN_CONT "ATAPI ");
167 switch (type) {
168 case ide_floppy:
169 if (!strstr(m, "CD-ROM")) {
170 if (!strstr(m, "oppy") &&
171 !strstr(m, "poyp") &&
172 !strstr(m, "ZIP"))
173 printk(KERN_CONT "cdrom or floppy?, assuming ");
174 if (drive->media != ide_cdrom) {
175 printk(KERN_CONT "FLOPPY");
176 drive->dev_flags |= IDE_DFLAG_REMOVABLE;
177 break;
178 }
179 }
180 /* Early cdrom models used zero */
181 type = ide_cdrom;
182 case ide_cdrom:
183 drive->dev_flags |= IDE_DFLAG_REMOVABLE;
184 #ifdef CONFIG_PPC
185 /* kludge for Apple PowerBook internal zip */
186 if (!strstr(m, "CD-ROM") && strstr(m, "ZIP")) {
187 printk(KERN_CONT "FLOPPY");
188 type = ide_floppy;
189 break;
190 }
191 #endif
192 printk(KERN_CONT "CD/DVD-ROM");
193 break;
194 case ide_tape:
195 printk(KERN_CONT "TAPE");
196 break;
197 case ide_optical:
198 printk(KERN_CONT "OPTICAL");
199 drive->dev_flags |= IDE_DFLAG_REMOVABLE;
200 break;
201 default:
202 printk(KERN_CONT "UNKNOWN (type %d)", type);
203 break;
204 }
205 printk(KERN_CONT " drive\n");
206 drive->media = type;
207 /* an ATAPI device ignores DRDY */
208 drive->ready_stat = 0;
209 return;
210 }
211
212 /*
213 * Not an ATAPI device: looks like a "regular" hard disk
214 */
215
216 is_cfa = ata_id_is_cfa(id);
217
218 /* CF devices are *not* removable in Linux definition of the term */
219 if (is_cfa == 0 && (id[ATA_ID_CONFIG] & (1 << 7)))
220 drive->dev_flags |= IDE_DFLAG_REMOVABLE;
221
222 drive->media = ide_disk;
223
224 printk(KERN_CONT "%s DISK drive\n", is_cfa ? "CFA" : "ATA");
225
226 return;
227
228 err_misc:
229 kfree(id);
230 drive->dev_flags &= ~IDE_DFLAG_PRESENT;
231 return;
232 }
233
234 /**
235 * actual_try_to_identify - send ata/atapi identify
236 * @drive: drive to identify
237 * @cmd: command to use
238 *
239 * try_to_identify() sends an ATA(PI) IDENTIFY request to a drive
240 * and waits for a response. It also monitors irqs while this is
241 * happening, in hope of automatically determining which one is
242 * being used by the interface.
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 static int actual_try_to_identify (ide_drive_t *drive, u8 cmd)
250 {
251 ide_hwif_t *hwif = HWIF(drive);
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 /* take a deep breath */
259 msleep(50);
260
261 if (io_ports->ctl_addr) {
262 a = tp_ops->read_altstatus(hwif);
263 s = tp_ops->read_status(hwif);
264 if ((a ^ s) & ~ATA_IDX)
265 /* ancient Seagate drives, broken interfaces */
266 printk(KERN_INFO "%s: probing with STATUS(0x%02x) "
267 "instead of ALTSTATUS(0x%02x)\n",
268 drive->name, s, a);
269 else
270 /* use non-intrusive polling */
271 use_altstatus = 1;
272 }
273
274 /* set features register for atapi
275 * identify command to be sure of reply
276 */
277 if (cmd == ATA_CMD_ID_ATAPI) {
278 ide_task_t task;
279
280 memset(&task, 0, sizeof(task));
281 /* disable DMA & overlap */
282 task.tf_flags = IDE_TFLAG_OUT_FEATURE;
283
284 tp_ops->tf_load(drive, &task);
285 }
286
287 /* ask drive for ID */
288 tp_ops->exec_command(hwif, cmd);
289
290 timeout = ((cmd == ATA_CMD_ID_ATA) ? WAIT_WORSTCASE : WAIT_PIDENTIFY) / 2;
291
292 if (ide_busy_sleep(hwif, timeout, use_altstatus))
293 return 1;
294
295 /* wait for IRQ and ATA_DRQ */
296 msleep(50);
297 s = tp_ops->read_status(hwif);
298
299 if (OK_STAT(s, ATA_DRQ, BAD_R_STAT)) {
300 unsigned long flags;
301
302 /* local CPU only; some systems need this */
303 local_irq_save(flags);
304 /* drive returned ID */
305 do_identify(drive, cmd);
306 /* drive responded with ID */
307 rc = 0;
308 /* clear drive IRQ */
309 (void)tp_ops->read_status(hwif);
310 local_irq_restore(flags);
311 } else {
312 /* drive refused ID */
313 rc = 2;
314 }
315 return rc;
316 }
317
318 /**
319 * try_to_identify - try to identify a drive
320 * @drive: drive to probe
321 * @cmd: command to use
322 *
323 * Issue the identify command and then do IRQ probing to
324 * complete the identification when needed by finding the
325 * IRQ the drive is attached to
326 */
327
328 static int try_to_identify (ide_drive_t *drive, u8 cmd)
329 {
330 ide_hwif_t *hwif = HWIF(drive);
331 const struct ide_tp_ops *tp_ops = hwif->tp_ops;
332 int retval;
333 int autoprobe = 0;
334 unsigned long cookie = 0;
335
336 /*
337 * Disable device irq unless we need to
338 * probe for it. Otherwise we'll get spurious
339 * interrupts during the identify-phase that
340 * the irq handler isn't expecting.
341 */
342 if (hwif->io_ports.ctl_addr) {
343 if (!hwif->irq) {
344 autoprobe = 1;
345 cookie = probe_irq_on();
346 }
347 tp_ops->set_irq(hwif, autoprobe);
348 }
349
350 retval = actual_try_to_identify(drive, cmd);
351
352 if (autoprobe) {
353 int irq;
354
355 tp_ops->set_irq(hwif, 0);
356 /* clear drive IRQ */
357 (void)tp_ops->read_status(hwif);
358 udelay(5);
359 irq = probe_irq_off(cookie);
360 if (!hwif->irq) {
361 if (irq > 0) {
362 hwif->irq = irq;
363 } else {
364 /* Mmmm.. multiple IRQs..
365 * don't know which was ours
366 */
367 printk(KERN_ERR "%s: IRQ probe failed (0x%lx)\n",
368 drive->name, cookie);
369 }
370 }
371 }
372 return retval;
373 }
374
375 int ide_busy_sleep(ide_hwif_t *hwif, unsigned long timeout, int altstatus)
376 {
377 u8 stat;
378
379 timeout += jiffies;
380
381 do {
382 msleep(50); /* give drive a breather */
383 stat = altstatus ? hwif->tp_ops->read_altstatus(hwif)
384 : hwif->tp_ops->read_status(hwif);
385 if ((stat & ATA_BUSY) == 0)
386 return 0;
387 } while (time_before(jiffies, timeout));
388
389 return 1; /* drive timed-out */
390 }
391
392 static u8 ide_read_device(ide_drive_t *drive)
393 {
394 ide_task_t task;
395
396 memset(&task, 0, sizeof(task));
397 task.tf_flags = IDE_TFLAG_IN_DEVICE;
398
399 drive->hwif->tp_ops->tf_read(drive, &task);
400
401 return task.tf.device;
402 }
403
404 /**
405 * do_probe - probe an IDE device
406 * @drive: drive to probe
407 * @cmd: command to use
408 *
409 * do_probe() has the difficult job of finding a drive if it exists,
410 * without getting hung up if it doesn't exist, without trampling on
411 * ethernet cards, and without leaving any IRQs dangling to haunt us later.
412 *
413 * If a drive is "known" to exist (from CMOS or kernel parameters),
414 * but does not respond right away, the probe will "hang in there"
415 * for the maximum wait time (about 30 seconds), otherwise it will
416 * exit much more quickly.
417 *
418 * Returns: 0 device was identified
419 * 1 device timed-out (no response to identify request)
420 * 2 device aborted the command (refused to identify itself)
421 * 3 bad status from device (possible for ATAPI drives)
422 * 4 probe was not attempted because failure was obvious
423 */
424
425 static int do_probe (ide_drive_t *drive, u8 cmd)
426 {
427 ide_hwif_t *hwif = HWIF(drive);
428 const struct ide_tp_ops *tp_ops = hwif->tp_ops;
429 int rc;
430 u8 present = !!(drive->dev_flags & IDE_DFLAG_PRESENT), stat;
431
432 /* avoid waiting for inappropriate probes */
433 if (present && drive->media != ide_disk && cmd == ATA_CMD_ID_ATA)
434 return 4;
435
436 #ifdef DEBUG
437 printk(KERN_INFO "probing for %s: present=%d, media=%d, probetype=%s\n",
438 drive->name, present, drive->media,
439 (cmd == ATA_CMD_ID_ATA) ? "ATA" : "ATAPI");
440 #endif
441
442 /* needed for some systems
443 * (e.g. crw9624 as drive0 with disk as slave)
444 */
445 msleep(50);
446 SELECT_DRIVE(drive);
447 msleep(50);
448
449 if (ide_read_device(drive) != drive->select.all && present == 0) {
450 if (drive->select.b.unit != 0) {
451 /* exit with drive0 selected */
452 SELECT_DRIVE(&hwif->drives[0]);
453 /* allow ATA_BUSY to assert & clear */
454 msleep(50);
455 }
456 /* no i/f present: mmm.. this should be a 4 -ml */
457 return 3;
458 }
459
460 stat = tp_ops->read_status(hwif);
461
462 if (OK_STAT(stat, ATA_DRDY, ATA_BUSY) ||
463 present || cmd == ATA_CMD_ID_ATAPI) {
464 /* send cmd and wait */
465 if ((rc = try_to_identify(drive, cmd))) {
466 /* failed: try again */
467 rc = try_to_identify(drive,cmd);
468 }
469
470 stat = tp_ops->read_status(hwif);
471
472 if (stat == (ATA_BUSY | ATA_DRDY))
473 return 4;
474
475 if (rc == 1 && cmd == ATA_CMD_ID_ATAPI) {
476 printk(KERN_ERR "%s: no response (status = 0x%02x), "
477 "resetting drive\n", drive->name, stat);
478 msleep(50);
479 SELECT_DRIVE(drive);
480 msleep(50);
481 tp_ops->exec_command(hwif, ATA_CMD_DEV_RESET);
482 (void)ide_busy_sleep(hwif, WAIT_WORSTCASE, 0);
483 rc = try_to_identify(drive, cmd);
484 }
485
486 /* ensure drive IRQ is clear */
487 stat = tp_ops->read_status(hwif);
488
489 if (rc == 1)
490 printk(KERN_ERR "%s: no response (status = 0x%02x)\n",
491 drive->name, stat);
492 } else {
493 /* not present or maybe ATAPI */
494 rc = 3;
495 }
496 if (drive->select.b.unit != 0) {
497 /* exit with drive0 selected */
498 SELECT_DRIVE(&hwif->drives[0]);
499 msleep(50);
500 /* ensure drive irq is clear */
501 (void)tp_ops->read_status(hwif);
502 }
503 return rc;
504 }
505
506 /*
507 *
508 */
509 static void enable_nest (ide_drive_t *drive)
510 {
511 ide_hwif_t *hwif = HWIF(drive);
512 const struct ide_tp_ops *tp_ops = hwif->tp_ops;
513 u8 stat;
514
515 printk(KERN_INFO "%s: enabling %s -- ",
516 hwif->name, (char *)&drive->id[ATA_ID_PROD]);
517
518 SELECT_DRIVE(drive);
519 msleep(50);
520 tp_ops->exec_command(hwif, ATA_EXABYTE_ENABLE_NEST);
521
522 if (ide_busy_sleep(hwif, WAIT_WORSTCASE, 0)) {
523 printk(KERN_CONT "failed (timeout)\n");
524 return;
525 }
526
527 msleep(50);
528
529 stat = tp_ops->read_status(hwif);
530
531 if (!OK_STAT(stat, 0, BAD_STAT))
532 printk(KERN_CONT "failed (status = 0x%02x)\n", stat);
533 else
534 printk(KERN_CONT "success\n");
535 }
536
537 /**
538 * probe_for_drives - upper level drive probe
539 * @drive: drive to probe for
540 *
541 * probe_for_drive() tests for existence of a given drive using do_probe()
542 * and presents things to the user as needed.
543 *
544 * Returns: 0 no device was found
545 * 1 device was found
546 * (note: IDE_DFLAG_PRESENT might still be not set)
547 */
548
549 static inline u8 probe_for_drive (ide_drive_t *drive)
550 {
551 char *m;
552
553 /*
554 * In order to keep things simple we have an id
555 * block for all drives at all times. If the device
556 * is pre ATA or refuses ATA/ATAPI identify we
557 * will add faked data to this.
558 *
559 * Also note that 0 everywhere means "can't do X"
560 */
561
562 drive->dev_flags &= ~IDE_DFLAG_ID_READ;
563
564 drive->id = kzalloc(SECTOR_SIZE, GFP_KERNEL);
565 if (drive->id == NULL) {
566 printk(KERN_ERR "ide: out of memory for id data.\n");
567 return 0;
568 }
569
570 m = (char *)&drive->id[ATA_ID_PROD];
571 strcpy(m, "UNKNOWN");
572
573 /* skip probing? */
574 if ((drive->dev_flags & IDE_DFLAG_NOPROBE) == 0) {
575 retry:
576 /* if !(success||timed-out) */
577 if (do_probe(drive, ATA_CMD_ID_ATA) >= 2)
578 /* look for ATAPI device */
579 (void)do_probe(drive, ATA_CMD_ID_ATAPI);
580
581 if ((drive->dev_flags & IDE_DFLAG_PRESENT) == 0)
582 /* drive not found */
583 return 0;
584
585 if (strstr(m, "E X A B Y T E N E S T")) {
586 enable_nest(drive);
587 goto retry;
588 }
589
590 /* identification failed? */
591 if ((drive->dev_flags & IDE_DFLAG_ID_READ) == 0) {
592 if (drive->media == ide_disk) {
593 printk(KERN_INFO "%s: non-IDE drive, CHS=%d/%d/%d\n",
594 drive->name, drive->cyl,
595 drive->head, drive->sect);
596 } else if (drive->media == ide_cdrom) {
597 printk(KERN_INFO "%s: ATAPI cdrom (?)\n", drive->name);
598 } else {
599 /* nuke it */
600 printk(KERN_WARNING "%s: Unknown device on bus refused identification. Ignoring.\n", drive->name);
601 drive->dev_flags &= ~IDE_DFLAG_PRESENT;
602 }
603 }
604 /* drive was found */
605 }
606
607 if ((drive->dev_flags & IDE_DFLAG_PRESENT) == 0)
608 return 0;
609
610 /* The drive wasn't being helpful. Add generic info only */
611 if ((drive->dev_flags & IDE_DFLAG_ID_READ) == 0) {
612 generic_id(drive);
613 return 1;
614 }
615
616 if (drive->media == ide_disk) {
617 ide_disk_init_chs(drive);
618 ide_disk_init_mult_count(drive);
619 }
620
621 return !!(drive->dev_flags & IDE_DFLAG_PRESENT);
622 }
623
624 static void hwif_release_dev(struct device *dev)
625 {
626 ide_hwif_t *hwif = container_of(dev, ide_hwif_t, gendev);
627
628 complete(&hwif->gendev_rel_comp);
629 }
630
631 static int ide_register_port(ide_hwif_t *hwif)
632 {
633 int ret;
634
635 /* register with global device tree */
636 strlcpy(hwif->gendev.bus_id,hwif->name,BUS_ID_SIZE);
637 hwif->gendev.driver_data = hwif;
638 if (hwif->gendev.parent == NULL) {
639 if (hwif->dev)
640 hwif->gendev.parent = hwif->dev;
641 else
642 /* Would like to do = &device_legacy */
643 hwif->gendev.parent = NULL;
644 }
645 hwif->gendev.release = hwif_release_dev;
646 ret = device_register(&hwif->gendev);
647 if (ret < 0) {
648 printk(KERN_WARNING "IDE: %s: device_register error: %d\n",
649 __func__, ret);
650 goto out;
651 }
652
653 hwif->portdev = device_create_drvdata(ide_port_class, &hwif->gendev,
654 MKDEV(0, 0), hwif, hwif->name);
655 if (IS_ERR(hwif->portdev)) {
656 ret = PTR_ERR(hwif->portdev);
657 device_unregister(&hwif->gendev);
658 }
659 out:
660 return ret;
661 }
662
663 /**
664 * ide_port_wait_ready - wait for port to become ready
665 * @hwif: IDE port
666 *
667 * This is needed on some PPCs and a bunch of BIOS-less embedded
668 * platforms. Typical cases are:
669 *
670 * - The firmware hard reset the disk before booting the kernel,
671 * the drive is still doing it's poweron-reset sequence, that
672 * can take up to 30 seconds.
673 *
674 * - The firmware does nothing (or no firmware), the device is
675 * still in POST state (same as above actually).
676 *
677 * - Some CD/DVD/Writer combo drives tend to drive the bus during
678 * their reset sequence even when they are non-selected slave
679 * devices, thus preventing discovery of the main HD.
680 *
681 * Doing this wait-for-non-busy should not harm any existing
682 * configuration and fix some issues like the above.
683 *
684 * BenH.
685 *
686 * Returns 0 on success, error code (< 0) otherwise.
687 */
688
689 static int ide_port_wait_ready(ide_hwif_t *hwif)
690 {
691 int unit, rc;
692
693 printk(KERN_DEBUG "Probing IDE interface %s...\n", hwif->name);
694
695 /* Let HW settle down a bit from whatever init state we
696 * come from */
697 mdelay(2);
698
699 /* Wait for BSY bit to go away, spec timeout is 30 seconds,
700 * I know of at least one disk who takes 31 seconds, I use 35
701 * here to be safe
702 */
703 rc = ide_wait_not_busy(hwif, 35000);
704 if (rc)
705 return rc;
706
707 /* Now make sure both master & slave are ready */
708 for (unit = 0; unit < MAX_DRIVES; unit++) {
709 ide_drive_t *drive = &hwif->drives[unit];
710
711 /* Ignore disks that we will not probe for later. */
712 if ((drive->dev_flags & IDE_DFLAG_NOPROBE) == 0 ||
713 (drive->dev_flags & IDE_DFLAG_PRESENT)) {
714 SELECT_DRIVE(drive);
715 hwif->tp_ops->set_irq(hwif, 1);
716 mdelay(2);
717 rc = ide_wait_not_busy(hwif, 35000);
718 if (rc)
719 goto out;
720 } else
721 printk(KERN_DEBUG "%s: ide_wait_not_busy() skipped\n",
722 drive->name);
723 }
724 out:
725 /* Exit function with master reselected (let's be sane) */
726 if (unit)
727 SELECT_DRIVE(&hwif->drives[0]);
728
729 return rc;
730 }
731
732 /**
733 * ide_undecoded_slave - look for bad CF adapters
734 * @dev1: slave device
735 *
736 * Analyse the drives on the interface and attempt to decide if we
737 * have the same drive viewed twice. This occurs with crap CF adapters
738 * and PCMCIA sometimes.
739 */
740
741 void ide_undecoded_slave(ide_drive_t *dev1)
742 {
743 ide_drive_t *dev0 = &dev1->hwif->drives[0];
744
745 if ((dev1->dn & 1) == 0 || (dev0->dev_flags & IDE_DFLAG_PRESENT) == 0)
746 return;
747
748 /* If the models don't match they are not the same product */
749 if (strcmp((char *)&dev0->id[ATA_ID_PROD],
750 (char *)&dev1->id[ATA_ID_PROD]))
751 return;
752
753 /* Serial numbers do not match */
754 if (strncmp((char *)&dev0->id[ATA_ID_SERNO],
755 (char *)&dev1->id[ATA_ID_SERNO], ATA_ID_SERNO_LEN))
756 return;
757
758 /* No serial number, thankfully very rare for CF */
759 if (*(char *)&dev0->id[ATA_ID_SERNO] == 0)
760 return;
761
762 /* Appears to be an IDE flash adapter with decode bugs */
763 printk(KERN_WARNING "ide-probe: ignoring undecoded slave\n");
764
765 dev1->dev_flags &= ~IDE_DFLAG_PRESENT;
766 }
767
768 EXPORT_SYMBOL_GPL(ide_undecoded_slave);
769
770 static int ide_probe_port(ide_hwif_t *hwif)
771 {
772 unsigned long flags;
773 unsigned int irqd;
774 int unit, rc = -ENODEV;
775
776 BUG_ON(hwif->present);
777
778 if ((hwif->drives[0].dev_flags & IDE_DFLAG_NOPROBE) &&
779 (hwif->drives[1].dev_flags & IDE_DFLAG_NOPROBE))
780 return -EACCES;
781
782 /*
783 * We must always disable IRQ, as probe_for_drive will assert IRQ, but
784 * we'll install our IRQ driver much later...
785 */
786 irqd = hwif->irq;
787 if (irqd)
788 disable_irq(hwif->irq);
789
790 local_irq_set(flags);
791
792 if (ide_port_wait_ready(hwif) == -EBUSY)
793 printk(KERN_DEBUG "%s: Wait for ready failed before probe !\n", hwif->name);
794
795 /*
796 * Second drive should only exist if first drive was found,
797 * but a lot of cdrom drives are configured as single slaves.
798 */
799 for (unit = 0; unit < MAX_DRIVES; ++unit) {
800 ide_drive_t *drive = &hwif->drives[unit];
801 drive->dn = (hwif->channel ? 2 : 0) + unit;
802 (void) probe_for_drive(drive);
803 if (drive->dev_flags & IDE_DFLAG_PRESENT)
804 rc = 0;
805 }
806
807 local_irq_restore(flags);
808
809 /*
810 * Use cached IRQ number. It might be (and is...) changed by probe
811 * code above
812 */
813 if (irqd)
814 enable_irq(irqd);
815
816 return rc;
817 }
818
819 static void ide_port_tune_devices(ide_hwif_t *hwif)
820 {
821 const struct ide_port_ops *port_ops = hwif->port_ops;
822 int unit;
823
824 for (unit = 0; unit < MAX_DRIVES; unit++) {
825 ide_drive_t *drive = &hwif->drives[unit];
826
827 if (drive->dev_flags & IDE_DFLAG_PRESENT) {
828 if (port_ops && port_ops->quirkproc)
829 port_ops->quirkproc(drive);
830 }
831 }
832
833 for (unit = 0; unit < MAX_DRIVES; ++unit) {
834 ide_drive_t *drive = &hwif->drives[unit];
835
836 if (drive->dev_flags & IDE_DFLAG_PRESENT) {
837 ide_set_max_pio(drive);
838
839 drive->dev_flags |= IDE_DFLAG_NICE1;
840
841 if (hwif->dma_ops)
842 ide_set_dma(drive);
843 }
844 }
845
846 for (unit = 0; unit < MAX_DRIVES; ++unit) {
847 ide_drive_t *drive = &hwif->drives[unit];
848
849 if ((hwif->host_flags & IDE_HFLAG_NO_IO_32BIT) ||
850 drive->id[ATA_ID_DWORD_IO])
851 drive->dev_flags |= IDE_DFLAG_NO_IO_32BIT;
852 else
853 drive->dev_flags &= ~IDE_DFLAG_NO_IO_32BIT;
854 }
855 }
856
857 /*
858 * save_match() is used to simplify logic in init_irq() below.
859 *
860 * A loophole here is that we may not know about a particular
861 * hwif's irq until after that hwif is actually probed/initialized..
862 * This could be a problem for the case where an hwif is on a
863 * dual interface that requires serialization (eg. cmd640) and another
864 * hwif using one of the same irqs is initialized beforehand.
865 *
866 * This routine detects and reports such situations, but does not fix them.
867 */
868 static void save_match(ide_hwif_t *hwif, ide_hwif_t *new, ide_hwif_t **match)
869 {
870 ide_hwif_t *m = *match;
871
872 if (m && m->hwgroup && m->hwgroup != new->hwgroup) {
873 if (!new->hwgroup)
874 return;
875 printk(KERN_WARNING "%s: potential IRQ problem with %s and %s\n",
876 hwif->name, new->name, m->name);
877 }
878 if (!m || m->irq != hwif->irq) /* don't undo a prior perfect match */
879 *match = new;
880 }
881
882 /*
883 * init request queue
884 */
885 static int ide_init_queue(ide_drive_t *drive)
886 {
887 struct request_queue *q;
888 ide_hwif_t *hwif = HWIF(drive);
889 int max_sectors = 256;
890 int max_sg_entries = PRD_ENTRIES;
891
892 /*
893 * Our default set up assumes the normal IDE case,
894 * that is 64K segmenting, standard PRD setup
895 * and LBA28. Some drivers then impose their own
896 * limits and LBA48 we could raise it but as yet
897 * do not.
898 */
899
900 q = blk_init_queue_node(do_ide_request, &ide_lock, hwif_to_node(hwif));
901 if (!q)
902 return 1;
903
904 q->queuedata = drive;
905 blk_queue_segment_boundary(q, 0xffff);
906
907 if (hwif->rqsize < max_sectors)
908 max_sectors = hwif->rqsize;
909 blk_queue_max_sectors(q, max_sectors);
910
911 #ifdef CONFIG_PCI
912 /* When we have an IOMMU, we may have a problem where pci_map_sg()
913 * creates segments that don't completely match our boundary
914 * requirements and thus need to be broken up again. Because it
915 * doesn't align properly either, we may actually have to break up
916 * to more segments than what was we got in the first place, a max
917 * worst case is twice as many.
918 * This will be fixed once we teach pci_map_sg() about our boundary
919 * requirements, hopefully soon. *FIXME*
920 */
921 if (!PCI_DMA_BUS_IS_PHYS)
922 max_sg_entries >>= 1;
923 #endif /* CONFIG_PCI */
924
925 blk_queue_max_hw_segments(q, max_sg_entries);
926 blk_queue_max_phys_segments(q, max_sg_entries);
927
928 /* assign drive queue */
929 drive->queue = q;
930
931 /* needs drive->queue to be set */
932 ide_toggle_bounce(drive, 1);
933
934 return 0;
935 }
936
937 static void ide_add_drive_to_hwgroup(ide_drive_t *drive)
938 {
939 ide_hwgroup_t *hwgroup = drive->hwif->hwgroup;
940
941 spin_lock_irq(&ide_lock);
942 if (!hwgroup->drive) {
943 /* first drive for hwgroup. */
944 drive->next = drive;
945 hwgroup->drive = drive;
946 hwgroup->hwif = HWIF(hwgroup->drive);
947 } else {
948 drive->next = hwgroup->drive->next;
949 hwgroup->drive->next = drive;
950 }
951 spin_unlock_irq(&ide_lock);
952 }
953
954 /*
955 * For any present drive:
956 * - allocate the block device queue
957 * - link drive into the hwgroup
958 */
959 static void ide_port_setup_devices(ide_hwif_t *hwif)
960 {
961 int i;
962
963 mutex_lock(&ide_cfg_mtx);
964 for (i = 0; i < MAX_DRIVES; i++) {
965 ide_drive_t *drive = &hwif->drives[i];
966
967 if ((drive->dev_flags & IDE_DFLAG_PRESENT) == 0)
968 continue;
969
970 if (ide_init_queue(drive)) {
971 printk(KERN_ERR "ide: failed to init %s\n",
972 drive->name);
973 continue;
974 }
975
976 ide_add_drive_to_hwgroup(drive);
977 }
978 mutex_unlock(&ide_cfg_mtx);
979 }
980
981 static ide_hwif_t *ide_ports[MAX_HWIFS];
982
983 void ide_remove_port_from_hwgroup(ide_hwif_t *hwif)
984 {
985 ide_hwgroup_t *hwgroup = hwif->hwgroup;
986
987 ide_ports[hwif->index] = NULL;
988
989 spin_lock_irq(&ide_lock);
990 /*
991 * Remove us from the hwgroup, and free
992 * the hwgroup if we were the only member
993 */
994 if (hwif->next == hwif) {
995 BUG_ON(hwgroup->hwif != hwif);
996 kfree(hwgroup);
997 } else {
998 /* There is another interface in hwgroup.
999 * Unlink us, and set hwgroup->drive and ->hwif to
1000 * something sane.
1001 */
1002 ide_hwif_t *g = hwgroup->hwif;
1003
1004 while (g->next != hwif)
1005 g = g->next;
1006 g->next = hwif->next;
1007 if (hwgroup->hwif == hwif) {
1008 /* Chose a random hwif for hwgroup->hwif.
1009 * It's guaranteed that there are no drives
1010 * left in the hwgroup.
1011 */
1012 BUG_ON(hwgroup->drive != NULL);
1013 hwgroup->hwif = g;
1014 }
1015 BUG_ON(hwgroup->hwif == hwif);
1016 }
1017 spin_unlock_irq(&ide_lock);
1018 }
1019
1020 /*
1021 * This routine sets up the irq for an ide interface, and creates a new
1022 * hwgroup for the irq/hwif if none was previously assigned.
1023 *
1024 * Much of the code is for correctly detecting/handling irq sharing
1025 * and irq serialization situations. This is somewhat complex because
1026 * it handles static as well as dynamic (PCMCIA) IDE interfaces.
1027 */
1028 static int init_irq (ide_hwif_t *hwif)
1029 {
1030 struct ide_io_ports *io_ports = &hwif->io_ports;
1031 unsigned int index;
1032 ide_hwgroup_t *hwgroup;
1033 ide_hwif_t *match = NULL;
1034
1035 mutex_lock(&ide_cfg_mtx);
1036 hwif->hwgroup = NULL;
1037
1038 /*
1039 * Group up with any other hwifs that share our irq(s).
1040 */
1041 for (index = 0; index < MAX_HWIFS; index++) {
1042 ide_hwif_t *h = ide_ports[index];
1043
1044 if (h && h->hwgroup) { /* scan only initialized ports */
1045 if (hwif->irq == h->irq) {
1046 hwif->sharing_irq = h->sharing_irq = 1;
1047 if (hwif->chipset != ide_pci ||
1048 h->chipset != ide_pci) {
1049 save_match(hwif, h, &match);
1050 }
1051 }
1052 if (hwif->serialized) {
1053 if (hwif->mate && hwif->mate->irq == h->irq)
1054 save_match(hwif, h, &match);
1055 }
1056 if (h->serialized) {
1057 if (h->mate && hwif->irq == h->mate->irq)
1058 save_match(hwif, h, &match);
1059 }
1060 }
1061 }
1062
1063 /*
1064 * If we are still without a hwgroup, then form a new one
1065 */
1066 if (match) {
1067 hwgroup = match->hwgroup;
1068 hwif->hwgroup = hwgroup;
1069 /*
1070 * Link us into the hwgroup.
1071 * This must be done early, do ensure that unexpected_intr
1072 * can find the hwif and prevent irq storms.
1073 * No drives are attached to the new hwif, choose_drive
1074 * can't do anything stupid (yet).
1075 * Add ourself as the 2nd entry to the hwgroup->hwif
1076 * linked list, the first entry is the hwif that owns
1077 * hwgroup->handler - do not change that.
1078 */
1079 spin_lock_irq(&ide_lock);
1080 hwif->next = hwgroup->hwif->next;
1081 hwgroup->hwif->next = hwif;
1082 BUG_ON(hwif->next == hwif);
1083 spin_unlock_irq(&ide_lock);
1084 } else {
1085 hwgroup = kmalloc_node(sizeof(*hwgroup), GFP_KERNEL|__GFP_ZERO,
1086 hwif_to_node(hwif));
1087 if (hwgroup == NULL)
1088 goto out_up;
1089
1090 hwif->hwgroup = hwgroup;
1091 hwgroup->hwif = hwif->next = hwif;
1092
1093 init_timer(&hwgroup->timer);
1094 hwgroup->timer.function = &ide_timer_expiry;
1095 hwgroup->timer.data = (unsigned long) hwgroup;
1096 }
1097
1098 ide_ports[hwif->index] = hwif;
1099
1100 /*
1101 * Allocate the irq, if not already obtained for another hwif
1102 */
1103 if (!match || match->irq != hwif->irq) {
1104 int sa = 0;
1105 #if defined(__mc68000__)
1106 sa = IRQF_SHARED;
1107 #endif /* __mc68000__ */
1108
1109 if (hwif->chipset == ide_pci || hwif->chipset == ide_cmd646 ||
1110 hwif->chipset == ide_ali14xx)
1111 sa = IRQF_SHARED;
1112
1113 if (io_ports->ctl_addr)
1114 hwif->tp_ops->set_irq(hwif, 1);
1115
1116 if (request_irq(hwif->irq,&ide_intr,sa,hwif->name,hwgroup))
1117 goto out_unlink;
1118 }
1119
1120 if (!hwif->rqsize) {
1121 if ((hwif->host_flags & IDE_HFLAG_NO_LBA48) ||
1122 (hwif->host_flags & IDE_HFLAG_NO_LBA48_DMA))
1123 hwif->rqsize = 256;
1124 else
1125 hwif->rqsize = 65536;
1126 }
1127
1128 #if !defined(__mc68000__)
1129 printk(KERN_INFO "%s at 0x%03lx-0x%03lx,0x%03lx on irq %d", hwif->name,
1130 io_ports->data_addr, io_ports->status_addr,
1131 io_ports->ctl_addr, hwif->irq);
1132 #else
1133 printk(KERN_INFO "%s at 0x%08lx on irq %d", hwif->name,
1134 io_ports->data_addr, hwif->irq);
1135 #endif /* __mc68000__ */
1136 if (match)
1137 printk(KERN_CONT " (%sed with %s)",
1138 hwif->sharing_irq ? "shar" : "serializ", match->name);
1139 printk(KERN_CONT "\n");
1140
1141 mutex_unlock(&ide_cfg_mtx);
1142 return 0;
1143 out_unlink:
1144 ide_remove_port_from_hwgroup(hwif);
1145 out_up:
1146 mutex_unlock(&ide_cfg_mtx);
1147 return 1;
1148 }
1149
1150 static int ata_lock(dev_t dev, void *data)
1151 {
1152 /* FIXME: we want to pin hwif down */
1153 return 0;
1154 }
1155
1156 static struct kobject *ata_probe(dev_t dev, int *part, void *data)
1157 {
1158 ide_hwif_t *hwif = data;
1159 int unit = *part >> PARTN_BITS;
1160 ide_drive_t *drive = &hwif->drives[unit];
1161
1162 if ((drive->dev_flags & IDE_DFLAG_PRESENT) == 0)
1163 return NULL;
1164
1165 if (drive->media == ide_disk)
1166 request_module("ide-disk");
1167 if (drive->dev_flags & IDE_DFLAG_SCSI)
1168 request_module("ide-scsi");
1169 if (drive->media == ide_cdrom || drive->media == ide_optical)
1170 request_module("ide-cd");
1171 if (drive->media == ide_tape)
1172 request_module("ide-tape");
1173 if (drive->media == ide_floppy)
1174 request_module("ide-floppy");
1175
1176 return NULL;
1177 }
1178
1179 static struct kobject *exact_match(dev_t dev, int *part, void *data)
1180 {
1181 struct gendisk *p = data;
1182 *part &= (1 << PARTN_BITS) - 1;
1183 return &disk_to_dev(p)->kobj;
1184 }
1185
1186 static int exact_lock(dev_t dev, void *data)
1187 {
1188 struct gendisk *p = data;
1189
1190 if (!get_disk(p))
1191 return -1;
1192 return 0;
1193 }
1194
1195 void ide_register_region(struct gendisk *disk)
1196 {
1197 blk_register_region(MKDEV(disk->major, disk->first_minor),
1198 disk->minors, NULL, exact_match, exact_lock, disk);
1199 }
1200
1201 EXPORT_SYMBOL_GPL(ide_register_region);
1202
1203 void ide_unregister_region(struct gendisk *disk)
1204 {
1205 blk_unregister_region(MKDEV(disk->major, disk->first_minor),
1206 disk->minors);
1207 }
1208
1209 EXPORT_SYMBOL_GPL(ide_unregister_region);
1210
1211 void ide_init_disk(struct gendisk *disk, ide_drive_t *drive)
1212 {
1213 ide_hwif_t *hwif = drive->hwif;
1214 unsigned int unit = (drive->select.all >> 4) & 1;
1215
1216 disk->major = hwif->major;
1217 disk->first_minor = unit << PARTN_BITS;
1218 sprintf(disk->disk_name, "hd%c", 'a' + hwif->index * MAX_DRIVES + unit);
1219 disk->queue = drive->queue;
1220 }
1221
1222 EXPORT_SYMBOL_GPL(ide_init_disk);
1223
1224 static void ide_remove_drive_from_hwgroup(ide_drive_t *drive)
1225 {
1226 ide_hwgroup_t *hwgroup = drive->hwif->hwgroup;
1227
1228 if (drive == drive->next) {
1229 /* special case: last drive from hwgroup. */
1230 BUG_ON(hwgroup->drive != drive);
1231 hwgroup->drive = NULL;
1232 } else {
1233 ide_drive_t *walk;
1234
1235 walk = hwgroup->drive;
1236 while (walk->next != drive)
1237 walk = walk->next;
1238 walk->next = drive->next;
1239 if (hwgroup->drive == drive) {
1240 hwgroup->drive = drive->next;
1241 hwgroup->hwif = hwgroup->drive->hwif;
1242 }
1243 }
1244 BUG_ON(hwgroup->drive == drive);
1245 }
1246
1247 static void drive_release_dev (struct device *dev)
1248 {
1249 ide_drive_t *drive = container_of(dev, ide_drive_t, gendev);
1250
1251 ide_proc_unregister_device(drive);
1252
1253 spin_lock_irq(&ide_lock);
1254 ide_remove_drive_from_hwgroup(drive);
1255 kfree(drive->id);
1256 drive->id = NULL;
1257 drive->dev_flags &= ~IDE_DFLAG_PRESENT;
1258 /* Messed up locking ... */
1259 spin_unlock_irq(&ide_lock);
1260 blk_cleanup_queue(drive->queue);
1261 spin_lock_irq(&ide_lock);
1262 drive->queue = NULL;
1263 spin_unlock_irq(&ide_lock);
1264
1265 complete(&drive->gendev_rel_comp);
1266 }
1267
1268 static int hwif_init(ide_hwif_t *hwif)
1269 {
1270 int old_irq;
1271
1272 if (!hwif->irq) {
1273 hwif->irq = __ide_default_irq(hwif->io_ports.data_addr);
1274 if (!hwif->irq) {
1275 printk(KERN_ERR "%s: disabled, no IRQ\n", hwif->name);
1276 return 0;
1277 }
1278 }
1279
1280 if (register_blkdev(hwif->major, hwif->name))
1281 return 0;
1282
1283 if (!hwif->sg_max_nents)
1284 hwif->sg_max_nents = PRD_ENTRIES;
1285
1286 hwif->sg_table = kmalloc(sizeof(struct scatterlist)*hwif->sg_max_nents,
1287 GFP_KERNEL);
1288 if (!hwif->sg_table) {
1289 printk(KERN_ERR "%s: unable to allocate SG table.\n", hwif->name);
1290 goto out;
1291 }
1292
1293 sg_init_table(hwif->sg_table, hwif->sg_max_nents);
1294
1295 if (init_irq(hwif) == 0)
1296 goto done;
1297
1298 old_irq = hwif->irq;
1299 /*
1300 * It failed to initialise. Find the default IRQ for
1301 * this port and try that.
1302 */
1303 hwif->irq = __ide_default_irq(hwif->io_ports.data_addr);
1304 if (!hwif->irq) {
1305 printk(KERN_ERR "%s: disabled, unable to get IRQ %d\n",
1306 hwif->name, old_irq);
1307 goto out;
1308 }
1309 if (init_irq(hwif)) {
1310 printk(KERN_ERR "%s: probed IRQ %d and default IRQ %d failed\n",
1311 hwif->name, old_irq, hwif->irq);
1312 goto out;
1313 }
1314 printk(KERN_WARNING "%s: probed IRQ %d failed, using default\n",
1315 hwif->name, hwif->irq);
1316
1317 done:
1318 blk_register_region(MKDEV(hwif->major, 0), MAX_DRIVES << PARTN_BITS,
1319 THIS_MODULE, ata_probe, ata_lock, hwif);
1320 return 1;
1321
1322 out:
1323 unregister_blkdev(hwif->major, hwif->name);
1324 return 0;
1325 }
1326
1327 static void hwif_register_devices(ide_hwif_t *hwif)
1328 {
1329 unsigned int i;
1330
1331 for (i = 0; i < MAX_DRIVES; i++) {
1332 ide_drive_t *drive = &hwif->drives[i];
1333 struct device *dev = &drive->gendev;
1334 int ret;
1335
1336 if ((drive->dev_flags & IDE_DFLAG_PRESENT) == 0)
1337 continue;
1338
1339 snprintf(dev->bus_id, BUS_ID_SIZE, "%u.%u", hwif->index, i);
1340 dev->parent = &hwif->gendev;
1341 dev->bus = &ide_bus_type;
1342 dev->driver_data = drive;
1343 dev->release = drive_release_dev;
1344
1345 ret = device_register(dev);
1346 if (ret < 0)
1347 printk(KERN_WARNING "IDE: %s: device_register error: "
1348 "%d\n", __func__, ret);
1349 }
1350 }
1351
1352 static void ide_port_init_devices(ide_hwif_t *hwif)
1353 {
1354 const struct ide_port_ops *port_ops = hwif->port_ops;
1355 int i;
1356
1357 for (i = 0; i < MAX_DRIVES; i++) {
1358 ide_drive_t *drive = &hwif->drives[i];
1359
1360 if (hwif->host_flags & IDE_HFLAG_IO_32BIT)
1361 drive->io_32bit = 1;
1362 if (hwif->host_flags & IDE_HFLAG_UNMASK_IRQS)
1363 drive->dev_flags |= IDE_DFLAG_UNMASK;
1364 if (hwif->host_flags & IDE_HFLAG_NO_UNMASK_IRQS)
1365 drive->dev_flags |= IDE_DFLAG_NO_UNMASK;
1366
1367 if (port_ops && port_ops->init_dev)
1368 port_ops->init_dev(drive);
1369 }
1370 }
1371
1372 static void ide_init_port(ide_hwif_t *hwif, unsigned int port,
1373 const struct ide_port_info *d)
1374 {
1375 hwif->channel = port;
1376
1377 if (d->chipset)
1378 hwif->chipset = d->chipset;
1379
1380 if (d->init_iops)
1381 d->init_iops(hwif);
1382
1383 if ((!hwif->irq && (d->host_flags & IDE_HFLAG_LEGACY_IRQS)) ||
1384 (d->host_flags & IDE_HFLAG_FORCE_LEGACY_IRQS))
1385 hwif->irq = port ? 15 : 14;
1386
1387 /* ->host_flags may be set by ->init_iops (or even earlier...) */
1388 hwif->host_flags |= d->host_flags;
1389 hwif->pio_mask = d->pio_mask;
1390
1391 if (d->tp_ops)
1392 hwif->tp_ops = d->tp_ops;
1393
1394 /* ->set_pio_mode for DTC2278 is currently limited to port 0 */
1395 if (hwif->chipset != ide_dtc2278 || hwif->channel == 0)
1396 hwif->port_ops = d->port_ops;
1397
1398 hwif->swdma_mask = d->swdma_mask;
1399 hwif->mwdma_mask = d->mwdma_mask;
1400 hwif->ultra_mask = d->udma_mask;
1401
1402 if ((d->host_flags & IDE_HFLAG_NO_DMA) == 0) {
1403 int rc;
1404
1405 if (d->init_dma)
1406 rc = d->init_dma(hwif, d);
1407 else
1408 rc = ide_hwif_setup_dma(hwif, d);
1409
1410 if (rc < 0) {
1411 printk(KERN_INFO "%s: DMA disabled\n", hwif->name);
1412 hwif->dma_base = 0;
1413 hwif->swdma_mask = 0;
1414 hwif->mwdma_mask = 0;
1415 hwif->ultra_mask = 0;
1416 } else if (d->dma_ops)
1417 hwif->dma_ops = d->dma_ops;
1418 }
1419
1420 if ((d->host_flags & IDE_HFLAG_SERIALIZE) ||
1421 ((d->host_flags & IDE_HFLAG_SERIALIZE_DMA) && hwif->dma_base)) {
1422 if (hwif->mate)
1423 hwif->mate->serialized = hwif->serialized = 1;
1424 }
1425
1426 if (d->host_flags & IDE_HFLAG_RQSIZE_256)
1427 hwif->rqsize = 256;
1428
1429 /* call chipset specific routine for each enabled port */
1430 if (d->init_hwif)
1431 d->init_hwif(hwif);
1432 }
1433
1434 static void ide_port_cable_detect(ide_hwif_t *hwif)
1435 {
1436 const struct ide_port_ops *port_ops = hwif->port_ops;
1437
1438 if (port_ops && port_ops->cable_detect && (hwif->ultra_mask & 0x78)) {
1439 if (hwif->cbl != ATA_CBL_PATA40_SHORT)
1440 hwif->cbl = port_ops->cable_detect(hwif);
1441 }
1442 }
1443
1444 static ssize_t store_delete_devices(struct device *portdev,
1445 struct device_attribute *attr,
1446 const char *buf, size_t n)
1447 {
1448 ide_hwif_t *hwif = dev_get_drvdata(portdev);
1449
1450 if (strncmp(buf, "1", n))
1451 return -EINVAL;
1452
1453 ide_port_unregister_devices(hwif);
1454
1455 return n;
1456 };
1457
1458 static DEVICE_ATTR(delete_devices, S_IWUSR, NULL, store_delete_devices);
1459
1460 static ssize_t store_scan(struct device *portdev,
1461 struct device_attribute *attr,
1462 const char *buf, size_t n)
1463 {
1464 ide_hwif_t *hwif = dev_get_drvdata(portdev);
1465
1466 if (strncmp(buf, "1", n))
1467 return -EINVAL;
1468
1469 ide_port_unregister_devices(hwif);
1470 ide_port_scan(hwif);
1471
1472 return n;
1473 };
1474
1475 static DEVICE_ATTR(scan, S_IWUSR, NULL, store_scan);
1476
1477 static struct device_attribute *ide_port_attrs[] = {
1478 &dev_attr_delete_devices,
1479 &dev_attr_scan,
1480 NULL
1481 };
1482
1483 static int ide_sysfs_register_port(ide_hwif_t *hwif)
1484 {
1485 int i, uninitialized_var(rc);
1486
1487 for (i = 0; ide_port_attrs[i]; i++) {
1488 rc = device_create_file(hwif->portdev, ide_port_attrs[i]);
1489 if (rc)
1490 break;
1491 }
1492
1493 return rc;
1494 }
1495
1496 static unsigned int ide_indexes;
1497
1498 /**
1499 * ide_find_port_slot - find free port slot
1500 * @d: IDE port info
1501 *
1502 * Return the new port slot index or -ENOENT if we are out of free slots.
1503 */
1504
1505 static int ide_find_port_slot(const struct ide_port_info *d)
1506 {
1507 int idx = -ENOENT;
1508 u8 bootable = (d && (d->host_flags & IDE_HFLAG_NON_BOOTABLE)) ? 0 : 1;
1509 u8 i = (d && (d->host_flags & IDE_HFLAG_QD_2ND_PORT)) ? 1 : 0;;
1510
1511 /*
1512 * Claim an unassigned slot.
1513 *
1514 * Give preference to claiming other slots before claiming ide0/ide1,
1515 * just in case there's another interface yet-to-be-scanned
1516 * which uses ports 0x1f0/0x170 (the ide0/ide1 defaults).
1517 *
1518 * Unless there is a bootable card that does not use the standard
1519 * ports 0x1f0/0x170 (the ide0/ide1 defaults).
1520 */
1521 mutex_lock(&ide_cfg_mtx);
1522 if (bootable) {
1523 if ((ide_indexes | i) != (1 << MAX_HWIFS) - 1)
1524 idx = ffz(ide_indexes | i);
1525 } else {
1526 if ((ide_indexes | 3) != (1 << MAX_HWIFS) - 1)
1527 idx = ffz(ide_indexes | 3);
1528 else if ((ide_indexes & 3) != 3)
1529 idx = ffz(ide_indexes);
1530 }
1531 if (idx >= 0)
1532 ide_indexes |= (1 << idx);
1533 mutex_unlock(&ide_cfg_mtx);
1534
1535 return idx;
1536 }
1537
1538 static void ide_free_port_slot(int idx)
1539 {
1540 mutex_lock(&ide_cfg_mtx);
1541 ide_indexes &= ~(1 << idx);
1542 mutex_unlock(&ide_cfg_mtx);
1543 }
1544
1545 struct ide_host *ide_host_alloc_all(const struct ide_port_info *d,
1546 hw_regs_t **hws)
1547 {
1548 struct ide_host *host;
1549 int i;
1550
1551 host = kzalloc(sizeof(*host), GFP_KERNEL);
1552 if (host == NULL)
1553 return NULL;
1554
1555 for (i = 0; i < MAX_HWIFS; i++) {
1556 ide_hwif_t *hwif;
1557 int idx;
1558
1559 if (hws[i] == NULL)
1560 continue;
1561
1562 hwif = kzalloc(sizeof(*hwif), GFP_KERNEL);
1563 if (hwif == NULL)
1564 continue;
1565
1566 idx = ide_find_port_slot(d);
1567 if (idx < 0) {
1568 printk(KERN_ERR "%s: no free slot for interface\n",
1569 d ? d->name : "ide");
1570 kfree(hwif);
1571 continue;
1572 }
1573
1574 ide_init_port_data(hwif, idx);
1575
1576 hwif->host = host;
1577
1578 host->ports[i] = hwif;
1579 host->n_ports++;
1580 }
1581
1582 if (host->n_ports == 0) {
1583 kfree(host);
1584 return NULL;
1585 }
1586
1587 if (hws[0])
1588 host->dev[0] = hws[0]->dev;
1589
1590 if (d) {
1591 host->init_chipset = d->init_chipset;
1592 host->host_flags = d->host_flags;
1593 }
1594
1595 return host;
1596 }
1597 EXPORT_SYMBOL_GPL(ide_host_alloc_all);
1598
1599 struct ide_host *ide_host_alloc(const struct ide_port_info *d, hw_regs_t **hws)
1600 {
1601 hw_regs_t *hws_all[MAX_HWIFS];
1602 int i;
1603
1604 for (i = 0; i < MAX_HWIFS; i++)
1605 hws_all[i] = (i < 4) ? hws[i] : NULL;
1606
1607 return ide_host_alloc_all(d, hws_all);
1608 }
1609 EXPORT_SYMBOL_GPL(ide_host_alloc);
1610
1611 int ide_host_register(struct ide_host *host, const struct ide_port_info *d,
1612 hw_regs_t **hws)
1613 {
1614 ide_hwif_t *hwif, *mate = NULL;
1615 int i, j = 0;
1616
1617 for (i = 0; i < MAX_HWIFS; i++) {
1618 hwif = host->ports[i];
1619
1620 if (hwif == NULL) {
1621 mate = NULL;
1622 continue;
1623 }
1624
1625 ide_init_port_hw(hwif, hws[i]);
1626 ide_port_apply_params(hwif);
1627
1628 if (d == NULL) {
1629 mate = NULL;
1630 continue;
1631 }
1632
1633 if ((i & 1) && mate) {
1634 hwif->mate = mate;
1635 mate->mate = hwif;
1636 }
1637
1638 mate = (i & 1) ? NULL : hwif;
1639
1640 ide_init_port(hwif, i & 1, d);
1641 ide_port_cable_detect(hwif);
1642 ide_port_init_devices(hwif);
1643 }
1644
1645 for (i = 0; i < MAX_HWIFS; i++) {
1646 hwif = host->ports[i];
1647
1648 if (hwif == NULL)
1649 continue;
1650
1651 if (ide_probe_port(hwif) == 0)
1652 hwif->present = 1;
1653
1654 if (hwif->chipset != ide_4drives || !hwif->mate ||
1655 !hwif->mate->present)
1656 ide_register_port(hwif);
1657
1658 if (hwif->present)
1659 ide_port_tune_devices(hwif);
1660 }
1661
1662 for (i = 0; i < MAX_HWIFS; i++) {
1663 hwif = host->ports[i];
1664
1665 if (hwif == NULL)
1666 continue;
1667
1668 if (hwif_init(hwif) == 0) {
1669 printk(KERN_INFO "%s: failed to initialize IDE "
1670 "interface\n", hwif->name);
1671 hwif->present = 0;
1672 continue;
1673 }
1674
1675 j++;
1676
1677 if (hwif->present)
1678 ide_port_setup_devices(hwif);
1679
1680 ide_acpi_init(hwif);
1681
1682 if (hwif->present)
1683 ide_acpi_port_init_devices(hwif);
1684 }
1685
1686 for (i = 0; i < MAX_HWIFS; i++) {
1687 hwif = host->ports[i];
1688
1689 if (hwif == NULL)
1690 continue;
1691
1692 if (hwif->chipset == ide_unknown)
1693 hwif->chipset = ide_generic;
1694
1695 if (hwif->present)
1696 hwif_register_devices(hwif);
1697 }
1698
1699 for (i = 0; i < MAX_HWIFS; i++) {
1700 hwif = host->ports[i];
1701
1702 if (hwif == NULL)
1703 continue;
1704
1705 ide_sysfs_register_port(hwif);
1706 ide_proc_register_port(hwif);
1707
1708 if (hwif->present)
1709 ide_proc_port_register_devices(hwif);
1710 }
1711
1712 return j ? 0 : -1;
1713 }
1714 EXPORT_SYMBOL_GPL(ide_host_register);
1715
1716 int ide_host_add(const struct ide_port_info *d, hw_regs_t **hws,
1717 struct ide_host **hostp)
1718 {
1719 struct ide_host *host;
1720 int rc;
1721
1722 host = ide_host_alloc(d, hws);
1723 if (host == NULL)
1724 return -ENOMEM;
1725
1726 rc = ide_host_register(host, d, hws);
1727 if (rc) {
1728 ide_host_free(host);
1729 return rc;
1730 }
1731
1732 if (hostp)
1733 *hostp = host;
1734
1735 return 0;
1736 }
1737 EXPORT_SYMBOL_GPL(ide_host_add);
1738
1739 void ide_host_free(struct ide_host *host)
1740 {
1741 ide_hwif_t *hwif;
1742 int i;
1743
1744 for (i = 0; i < MAX_HWIFS; i++) {
1745 hwif = host->ports[i];
1746
1747 if (hwif == NULL)
1748 continue;
1749
1750 ide_free_port_slot(hwif->index);
1751 kfree(hwif);
1752 }
1753
1754 kfree(host);
1755 }
1756 EXPORT_SYMBOL_GPL(ide_host_free);
1757
1758 void ide_host_remove(struct ide_host *host)
1759 {
1760 int i;
1761
1762 for (i = 0; i < MAX_HWIFS; i++) {
1763 if (host->ports[i])
1764 ide_unregister(host->ports[i]);
1765 }
1766
1767 ide_host_free(host);
1768 }
1769 EXPORT_SYMBOL_GPL(ide_host_remove);
1770
1771 void ide_port_scan(ide_hwif_t *hwif)
1772 {
1773 ide_port_apply_params(hwif);
1774 ide_port_cable_detect(hwif);
1775 ide_port_init_devices(hwif);
1776
1777 if (ide_probe_port(hwif) < 0)
1778 return;
1779
1780 hwif->present = 1;
1781
1782 ide_port_tune_devices(hwif);
1783 ide_acpi_port_init_devices(hwif);
1784 ide_port_setup_devices(hwif);
1785 hwif_register_devices(hwif);
1786 ide_proc_port_register_devices(hwif);
1787 }
1788 EXPORT_SYMBOL_GPL(ide_port_scan);
1789
1790 static void ide_legacy_init_one(hw_regs_t **hws, hw_regs_t *hw,
1791 u8 port_no, const struct ide_port_info *d,
1792 unsigned long config)
1793 {
1794 unsigned long base, ctl;
1795 int irq;
1796
1797 if (port_no == 0) {
1798 base = 0x1f0;
1799 ctl = 0x3f6;
1800 irq = 14;
1801 } else {
1802 base = 0x170;
1803 ctl = 0x376;
1804 irq = 15;
1805 }
1806
1807 if (!request_region(base, 8, d->name)) {
1808 printk(KERN_ERR "%s: I/O resource 0x%lX-0x%lX not free.\n",
1809 d->name, base, base + 7);
1810 return;
1811 }
1812
1813 if (!request_region(ctl, 1, d->name)) {
1814 printk(KERN_ERR "%s: I/O resource 0x%lX not free.\n",
1815 d->name, ctl);
1816 release_region(base, 8);
1817 return;
1818 }
1819
1820 ide_std_init_ports(hw, base, ctl);
1821 hw->irq = irq;
1822 hw->chipset = d->chipset;
1823 hw->config = config;
1824
1825 hws[port_no] = hw;
1826 }
1827
1828 int ide_legacy_device_add(const struct ide_port_info *d, unsigned long config)
1829 {
1830 hw_regs_t hw[2], *hws[] = { NULL, NULL, NULL, NULL };
1831
1832 memset(&hw, 0, sizeof(hw));
1833
1834 if ((d->host_flags & IDE_HFLAG_QD_2ND_PORT) == 0)
1835 ide_legacy_init_one(hws, &hw[0], 0, d, config);
1836 ide_legacy_init_one(hws, &hw[1], 1, d, config);
1837
1838 if (hws[0] == NULL && hws[1] == NULL &&
1839 (d->host_flags & IDE_HFLAG_SINGLE))
1840 return -ENOENT;
1841
1842 return ide_host_add(d, hws, NULL);
1843 }
1844 EXPORT_SYMBOL_GPL(ide_legacy_device_add);
Ubuntu Artful kernel mirror