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ide: use ATA_* defines instead of *_STAT and *_ERR ones
[GitHub/LineageOS/android_kernel_motorola_exynos9610.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 #ifdef CONFIG_IDEDISK_MULTI_MODE
93 if ((max_multsect / 2) > 1)
94 id[ATA_ID_MULTSECT] = max_multsect | 0x100;
95 else
96 id[ATA_ID_MULTSECT] &= ~0x1ff;
97
98 drive->mult_req = id[ATA_ID_MULTSECT] & 0xff;
99 #endif
100 if ((id[ATA_ID_MULTSECT] & 0x100) &&
101 (id[ATA_ID_MULTSECT] & 0xff))
102 drive->special.b.set_multmode = 1;
103 }
104 }
105
106 /**
107 * do_identify - identify a drive
108 * @drive: drive to identify
109 * @cmd: command used
110 *
111 * Called when we have issued a drive identify command to
112 * read and parse the results. This function is run with
113 * interrupts disabled.
114 */
115
116 static inline void do_identify (ide_drive_t *drive, u8 cmd)
117 {
118 ide_hwif_t *hwif = HWIF(drive);
119 u16 *id = drive->id;
120 char *m = (char *)&id[ATA_ID_PROD];
121 int bswap = 1;
122
123 /* read 512 bytes of id info */
124 hwif->tp_ops->input_data(drive, NULL, id, SECTOR_SIZE);
125
126 drive->id_read = 1;
127 local_irq_enable();
128 #ifdef DEBUG
129 printk(KERN_INFO "%s: dumping identify data\n", drive->name);
130 ide_dump_identify((u8 *)id);
131 #endif
132 ide_fix_driveid(id);
133
134 /*
135 * ATA_CMD_ID_ATA returns little-endian info,
136 * ATA_CMD_ID_ATAPI *usually* returns little-endian info.
137 */
138 if (cmd == ATA_CMD_ID_ATAPI) {
139 if ((m[0] == 'N' && m[1] == 'E') || /* NEC */
140 (m[0] == 'F' && m[1] == 'X') || /* Mitsumi */
141 (m[0] == 'P' && m[1] == 'i')) /* Pioneer */
142 /* Vertos drives may still be weird */
143 bswap ^= 1;
144 }
145
146 ide_fixstring(m, ATA_ID_PROD_LEN, bswap);
147 ide_fixstring((char *)&id[ATA_ID_FW_REV], ATA_ID_FW_REV_LEN, bswap);
148 ide_fixstring((char *)&id[ATA_ID_SERNO], ATA_ID_SERNO_LEN, bswap);
149
150 /* we depend on this a lot! */
151 m[ATA_ID_PROD_LEN - 1] = '\0';
152
153 if (strstr(m, "E X A B Y T E N E S T"))
154 goto err_misc;
155
156 printk(KERN_INFO "%s: %s, ", drive->name, m);
157
158 drive->present = 1;
159 drive->dead = 0;
160
161 /*
162 * Check for an ATAPI device
163 */
164 if (cmd == ATA_CMD_ID_ATAPI) {
165 u8 type = (id[ATA_ID_CONFIG] >> 8) & 0x1f;
166
167 printk(KERN_CONT "ATAPI ");
168 switch (type) {
169 case ide_floppy:
170 if (!strstr(m, "CD-ROM")) {
171 if (!strstr(m, "oppy") &&
172 !strstr(m, "poyp") &&
173 !strstr(m, "ZIP"))
174 printk(KERN_CONT "cdrom or floppy?, assuming ");
175 if (drive->media != ide_cdrom) {
176 printk(KERN_CONT "FLOPPY");
177 drive->removable = 1;
178 break;
179 }
180 }
181 /* Early cdrom models used zero */
182 type = ide_cdrom;
183 case ide_cdrom:
184 drive->removable = 1;
185 #ifdef CONFIG_PPC
186 /* kludge for Apple PowerBook internal zip */
187 if (!strstr(m, "CD-ROM") && strstr(m, "ZIP")) {
188 printk(KERN_CONT "FLOPPY");
189 type = ide_floppy;
190 break;
191 }
192 #endif
193 printk(KERN_CONT "CD/DVD-ROM");
194 break;
195 case ide_tape:
196 printk(KERN_CONT "TAPE");
197 break;
198 case ide_optical:
199 printk(KERN_CONT "OPTICAL");
200 drive->removable = 1;
201 break;
202 default:
203 printk(KERN_CONT "UNKNOWN (type %d)", type);
204 break;
205 }
206 printk(KERN_CONT " drive\n");
207 drive->media = type;
208 /* an ATAPI device ignores DRDY */
209 drive->ready_stat = 0;
210 return;
211 }
212
213 /*
214 * Not an ATAPI device: looks like a "regular" hard disk
215 */
216
217 /*
218 * 0x848a = CompactFlash device
219 * These are *not* removable in Linux definition of the term
220 */
221 if (id[ATA_ID_CONFIG] != 0x848a && (id[ATA_ID_CONFIG] & (1 << 7)))
222 drive->removable = 1;
223
224 drive->media = ide_disk;
225
226 printk(KERN_CONT "%s DISK drive\n",
227 (id[ATA_ID_CONFIG] == 0x848a) ? "CFA" : "ATA");
228
229 return;
230
231 err_misc:
232 kfree(id);
233 drive->present = 0;
234 return;
235 }
236
237 /**
238 * actual_try_to_identify - send ata/atapi identify
239 * @drive: drive to identify
240 * @cmd: command to use
241 *
242 * try_to_identify() sends an ATA(PI) IDENTIFY request to a drive
243 * and waits for a response. It also monitors irqs while this is
244 * happening, in hope of automatically determining which one is
245 * being used by the interface.
246 *
247 * Returns: 0 device was identified
248 * 1 device timed-out (no response to identify request)
249 * 2 device aborted the command (refused to identify itself)
250 */
251
252 static int actual_try_to_identify (ide_drive_t *drive, u8 cmd)
253 {
254 ide_hwif_t *hwif = HWIF(drive);
255 struct ide_io_ports *io_ports = &hwif->io_ports;
256 const struct ide_tp_ops *tp_ops = hwif->tp_ops;
257 int use_altstatus = 0, rc;
258 unsigned long timeout;
259 u8 s = 0, a = 0;
260
261 /* take a deep breath */
262 msleep(50);
263
264 if (io_ports->ctl_addr) {
265 a = tp_ops->read_altstatus(hwif);
266 s = tp_ops->read_status(hwif);
267 if ((a ^ s) & ~ATA_IDX)
268 /* ancient Seagate drives, broken interfaces */
269 printk(KERN_INFO "%s: probing with STATUS(0x%02x) "
270 "instead of ALTSTATUS(0x%02x)\n",
271 drive->name, s, a);
272 else
273 /* use non-intrusive polling */
274 use_altstatus = 1;
275 }
276
277 /* set features register for atapi
278 * identify command to be sure of reply
279 */
280 if (cmd == ATA_CMD_ID_ATAPI) {
281 ide_task_t task;
282
283 memset(&task, 0, sizeof(task));
284 /* disable DMA & overlap */
285 task.tf_flags = IDE_TFLAG_OUT_FEATURE;
286
287 tp_ops->tf_load(drive, &task);
288 }
289
290 /* ask drive for ID */
291 tp_ops->exec_command(hwif, cmd);
292
293 timeout = ((cmd == ATA_CMD_ID_ATA) ? WAIT_WORSTCASE : WAIT_PIDENTIFY) / 2;
294 timeout += jiffies;
295 do {
296 if (time_after(jiffies, timeout)) {
297 /* drive timed-out */
298 return 1;
299 }
300 /* give drive a breather */
301 msleep(50);
302 s = use_altstatus ? tp_ops->read_altstatus(hwif)
303 : tp_ops->read_status(hwif);
304 } while (s & ATA_BUSY);
305
306 /* wait for IRQ and ATA_DRQ */
307 msleep(50);
308 s = tp_ops->read_status(hwif);
309
310 if (OK_STAT(s, ATA_DRQ, BAD_R_STAT)) {
311 unsigned long flags;
312
313 /* local CPU only; some systems need this */
314 local_irq_save(flags);
315 /* drive returned ID */
316 do_identify(drive, cmd);
317 /* drive responded with ID */
318 rc = 0;
319 /* clear drive IRQ */
320 (void)tp_ops->read_status(hwif);
321 local_irq_restore(flags);
322 } else {
323 /* drive refused ID */
324 rc = 2;
325 }
326 return rc;
327 }
328
329 /**
330 * try_to_identify - try to identify a drive
331 * @drive: drive to probe
332 * @cmd: command to use
333 *
334 * Issue the identify command and then do IRQ probing to
335 * complete the identification when needed by finding the
336 * IRQ the drive is attached to
337 */
338
339 static int try_to_identify (ide_drive_t *drive, u8 cmd)
340 {
341 ide_hwif_t *hwif = HWIF(drive);
342 const struct ide_tp_ops *tp_ops = hwif->tp_ops;
343 int retval;
344 int autoprobe = 0;
345 unsigned long cookie = 0;
346
347 /*
348 * Disable device irq unless we need to
349 * probe for it. Otherwise we'll get spurious
350 * interrupts during the identify-phase that
351 * the irq handler isn't expecting.
352 */
353 if (hwif->io_ports.ctl_addr) {
354 if (!hwif->irq) {
355 autoprobe = 1;
356 cookie = probe_irq_on();
357 }
358 tp_ops->set_irq(hwif, autoprobe);
359 }
360
361 retval = actual_try_to_identify(drive, cmd);
362
363 if (autoprobe) {
364 int irq;
365
366 tp_ops->set_irq(hwif, 0);
367 /* clear drive IRQ */
368 (void)tp_ops->read_status(hwif);
369 udelay(5);
370 irq = probe_irq_off(cookie);
371 if (!hwif->irq) {
372 if (irq > 0) {
373 hwif->irq = irq;
374 } else {
375 /* Mmmm.. multiple IRQs..
376 * don't know which was ours
377 */
378 printk(KERN_ERR "%s: IRQ probe failed (0x%lx)\n",
379 drive->name, cookie);
380 }
381 }
382 }
383 return retval;
384 }
385
386 static int ide_busy_sleep(ide_hwif_t *hwif)
387 {
388 unsigned long timeout = jiffies + WAIT_WORSTCASE;
389 u8 stat;
390
391 do {
392 msleep(50);
393 stat = hwif->tp_ops->read_status(hwif);
394 if ((stat & ATA_BUSY) == 0)
395 return 0;
396 } while (time_before(jiffies, timeout));
397
398 return 1;
399 }
400
401 static u8 ide_read_device(ide_drive_t *drive)
402 {
403 ide_task_t task;
404
405 memset(&task, 0, sizeof(task));
406 task.tf_flags = IDE_TFLAG_IN_DEVICE;
407
408 drive->hwif->tp_ops->tf_read(drive, &task);
409
410 return task.tf.device;
411 }
412
413 /**
414 * do_probe - probe an IDE device
415 * @drive: drive to probe
416 * @cmd: command to use
417 *
418 * do_probe() has the difficult job of finding a drive if it exists,
419 * without getting hung up if it doesn't exist, without trampling on
420 * ethernet cards, and without leaving any IRQs dangling to haunt us later.
421 *
422 * If a drive is "known" to exist (from CMOS or kernel parameters),
423 * but does not respond right away, the probe will "hang in there"
424 * for the maximum wait time (about 30 seconds), otherwise it will
425 * exit much more quickly.
426 *
427 * Returns: 0 device was identified
428 * 1 device timed-out (no response to identify request)
429 * 2 device aborted the command (refused to identify itself)
430 * 3 bad status from device (possible for ATAPI drives)
431 * 4 probe was not attempted because failure was obvious
432 */
433
434 static int do_probe (ide_drive_t *drive, u8 cmd)
435 {
436 ide_hwif_t *hwif = HWIF(drive);
437 const struct ide_tp_ops *tp_ops = hwif->tp_ops;
438 int rc;
439 u8 stat;
440
441 if (drive->present) {
442 /* avoid waiting for inappropriate probes */
443 if (drive->media != ide_disk && cmd == ATA_CMD_ID_ATA)
444 return 4;
445 }
446 #ifdef DEBUG
447 printk(KERN_INFO "probing for %s: present=%d, media=%d, probetype=%s\n",
448 drive->name, drive->present, drive->media,
449 (cmd == ATA_CMD_ID_ATA) ? "ATA" : "ATAPI");
450 #endif
451
452 /* needed for some systems
453 * (e.g. crw9624 as drive0 with disk as slave)
454 */
455 msleep(50);
456 SELECT_DRIVE(drive);
457 msleep(50);
458
459 if (ide_read_device(drive) != drive->select.all && !drive->present) {
460 if (drive->select.b.unit != 0) {
461 /* exit with drive0 selected */
462 SELECT_DRIVE(&hwif->drives[0]);
463 /* allow ATA_BUSY to assert & clear */
464 msleep(50);
465 }
466 /* no i/f present: mmm.. this should be a 4 -ml */
467 return 3;
468 }
469
470 stat = tp_ops->read_status(hwif);
471
472 if (OK_STAT(stat, ATA_DRDY, ATA_BUSY) ||
473 drive->present || cmd == ATA_CMD_ID_ATAPI) {
474 /* send cmd and wait */
475 if ((rc = try_to_identify(drive, cmd))) {
476 /* failed: try again */
477 rc = try_to_identify(drive,cmd);
478 }
479
480 stat = tp_ops->read_status(hwif);
481
482 if (stat == (ATA_BUSY | ATA_DRDY))
483 return 4;
484
485 if (rc == 1 && cmd == ATA_CMD_ID_ATAPI) {
486 printk(KERN_ERR "%s: no response (status = 0x%02x), "
487 "resetting drive\n", drive->name, stat);
488 msleep(50);
489 SELECT_DRIVE(drive);
490 msleep(50);
491 tp_ops->exec_command(hwif, ATA_CMD_DEV_RESET);
492 (void)ide_busy_sleep(hwif);
493 rc = try_to_identify(drive, cmd);
494 }
495
496 /* ensure drive IRQ is clear */
497 stat = tp_ops->read_status(hwif);
498
499 if (rc == 1)
500 printk(KERN_ERR "%s: no response (status = 0x%02x)\n",
501 drive->name, stat);
502 } else {
503 /* not present or maybe ATAPI */
504 rc = 3;
505 }
506 if (drive->select.b.unit != 0) {
507 /* exit with drive0 selected */
508 SELECT_DRIVE(&hwif->drives[0]);
509 msleep(50);
510 /* ensure drive irq is clear */
511 (void)tp_ops->read_status(hwif);
512 }
513 return rc;
514 }
515
516 /*
517 *
518 */
519 static void enable_nest (ide_drive_t *drive)
520 {
521 ide_hwif_t *hwif = HWIF(drive);
522 const struct ide_tp_ops *tp_ops = hwif->tp_ops;
523 u8 stat;
524
525 printk(KERN_INFO "%s: enabling %s -- ",
526 hwif->name, (char *)&drive->id[ATA_ID_PROD]);
527
528 SELECT_DRIVE(drive);
529 msleep(50);
530 tp_ops->exec_command(hwif, ATA_EXABYTE_ENABLE_NEST);
531
532 if (ide_busy_sleep(hwif)) {
533 printk(KERN_CONT "failed (timeout)\n");
534 return;
535 }
536
537 msleep(50);
538
539 stat = tp_ops->read_status(hwif);
540
541 if (!OK_STAT(stat, 0, BAD_STAT))
542 printk(KERN_CONT "failed (status = 0x%02x)\n", stat);
543 else
544 printk(KERN_CONT "success\n");
545
546 /* if !(success||timed-out) */
547 if (do_probe(drive, ATA_CMD_ID_ATA) >= 2)
548 /* look for ATAPI device */
549 (void)do_probe(drive, ATA_CMD_ID_ATAPI);
550 }
551
552 /**
553 * probe_for_drives - upper level drive probe
554 * @drive: drive to probe for
555 *
556 * probe_for_drive() tests for existence of a given drive using do_probe()
557 * and presents things to the user as needed.
558 *
559 * Returns: 0 no device was found
560 * 1 device was found (note: drive->present might
561 * still be 0)
562 */
563
564 static inline u8 probe_for_drive (ide_drive_t *drive)
565 {
566 char *m;
567
568 /*
569 * In order to keep things simple we have an id
570 * block for all drives at all times. If the device
571 * is pre ATA or refuses ATA/ATAPI identify we
572 * will add faked data to this.
573 *
574 * Also note that 0 everywhere means "can't do X"
575 */
576
577 drive->id = kzalloc(SECTOR_WORDS *4, GFP_KERNEL);
578 drive->id_read = 0;
579 if(drive->id == NULL)
580 {
581 printk(KERN_ERR "ide: out of memory for id data.\n");
582 return 0;
583 }
584
585 m = (char *)&drive->id[ATA_ID_PROD];
586 strcpy(m, "UNKNOWN");
587
588 /* skip probing? */
589 if (!drive->noprobe)
590 {
591 /* if !(success||timed-out) */
592 if (do_probe(drive, ATA_CMD_ID_ATA) >= 2)
593 /* look for ATAPI device */
594 (void)do_probe(drive, ATA_CMD_ID_ATAPI);
595 if (!drive->present)
596 /* drive not found */
597 return 0;
598
599 if (strstr(m, "E X A B Y T E N E S T"))
600 enable_nest(drive);
601
602 /* identification failed? */
603 if (!drive->id_read) {
604 if (drive->media == ide_disk) {
605 printk(KERN_INFO "%s: non-IDE drive, CHS=%d/%d/%d\n",
606 drive->name, drive->cyl,
607 drive->head, drive->sect);
608 } else if (drive->media == ide_cdrom) {
609 printk(KERN_INFO "%s: ATAPI cdrom (?)\n", drive->name);
610 } else {
611 /* nuke it */
612 printk(KERN_WARNING "%s: Unknown device on bus refused identification. Ignoring.\n", drive->name);
613 drive->present = 0;
614 }
615 }
616 /* drive was found */
617 }
618 if(!drive->present)
619 return 0;
620 /* The drive wasn't being helpful. Add generic info only */
621 if (drive->id_read == 0) {
622 generic_id(drive);
623 return 1;
624 }
625
626 if (drive->media == ide_disk) {
627 ide_disk_init_chs(drive);
628 ide_disk_init_mult_count(drive);
629 }
630
631 return drive->present;
632 }
633
634 static void hwif_release_dev(struct device *dev)
635 {
636 ide_hwif_t *hwif = container_of(dev, ide_hwif_t, gendev);
637
638 complete(&hwif->gendev_rel_comp);
639 }
640
641 static int ide_register_port(ide_hwif_t *hwif)
642 {
643 int ret;
644
645 /* register with global device tree */
646 strlcpy(hwif->gendev.bus_id,hwif->name,BUS_ID_SIZE);
647 hwif->gendev.driver_data = hwif;
648 if (hwif->gendev.parent == NULL) {
649 if (hwif->dev)
650 hwif->gendev.parent = hwif->dev;
651 else
652 /* Would like to do = &device_legacy */
653 hwif->gendev.parent = NULL;
654 }
655 hwif->gendev.release = hwif_release_dev;
656 ret = device_register(&hwif->gendev);
657 if (ret < 0) {
658 printk(KERN_WARNING "IDE: %s: device_register error: %d\n",
659 __func__, ret);
660 goto out;
661 }
662
663 hwif->portdev = device_create_drvdata(ide_port_class, &hwif->gendev,
664 MKDEV(0, 0), hwif, hwif->name);
665 if (IS_ERR(hwif->portdev)) {
666 ret = PTR_ERR(hwif->portdev);
667 device_unregister(&hwif->gendev);
668 }
669 out:
670 return ret;
671 }
672
673 /**
674 * ide_port_wait_ready - wait for port to become ready
675 * @hwif: IDE port
676 *
677 * This is needed on some PPCs and a bunch of BIOS-less embedded
678 * platforms. Typical cases are:
679 *
680 * - The firmware hard reset the disk before booting the kernel,
681 * the drive is still doing it's poweron-reset sequence, that
682 * can take up to 30 seconds.
683 *
684 * - The firmware does nothing (or no firmware), the device is
685 * still in POST state (same as above actually).
686 *
687 * - Some CD/DVD/Writer combo drives tend to drive the bus during
688 * their reset sequence even when they are non-selected slave
689 * devices, thus preventing discovery of the main HD.
690 *
691 * Doing this wait-for-non-busy should not harm any existing
692 * configuration and fix some issues like the above.
693 *
694 * BenH.
695 *
696 * Returns 0 on success, error code (< 0) otherwise.
697 */
698
699 static int ide_port_wait_ready(ide_hwif_t *hwif)
700 {
701 int unit, rc;
702
703 printk(KERN_DEBUG "Probing IDE interface %s...\n", hwif->name);
704
705 /* Let HW settle down a bit from whatever init state we
706 * come from */
707 mdelay(2);
708
709 /* Wait for BSY bit to go away, spec timeout is 30 seconds,
710 * I know of at least one disk who takes 31 seconds, I use 35
711 * here to be safe
712 */
713 rc = ide_wait_not_busy(hwif, 35000);
714 if (rc)
715 return rc;
716
717 /* Now make sure both master & slave are ready */
718 for (unit = 0; unit < MAX_DRIVES; unit++) {
719 ide_drive_t *drive = &hwif->drives[unit];
720
721 /* Ignore disks that we will not probe for later. */
722 if (!drive->noprobe || drive->present) {
723 SELECT_DRIVE(drive);
724 hwif->tp_ops->set_irq(hwif, 1);
725 mdelay(2);
726 rc = ide_wait_not_busy(hwif, 35000);
727 if (rc)
728 goto out;
729 } else
730 printk(KERN_DEBUG "%s: ide_wait_not_busy() skipped\n",
731 drive->name);
732 }
733 out:
734 /* Exit function with master reselected (let's be sane) */
735 if (unit)
736 SELECT_DRIVE(&hwif->drives[0]);
737
738 return rc;
739 }
740
741 /**
742 * ide_undecoded_slave - look for bad CF adapters
743 * @dev1: slave device
744 *
745 * Analyse the drives on the interface and attempt to decide if we
746 * have the same drive viewed twice. This occurs with crap CF adapters
747 * and PCMCIA sometimes.
748 */
749
750 void ide_undecoded_slave(ide_drive_t *dev1)
751 {
752 ide_drive_t *dev0 = &dev1->hwif->drives[0];
753
754 if ((dev1->dn & 1) == 0 || dev0->present == 0)
755 return;
756
757 /* If the models don't match they are not the same product */
758 if (strcmp((char *)&dev0->id[ATA_ID_PROD],
759 (char *)&dev1->id[ATA_ID_PROD]))
760 return;
761
762 /* Serial numbers do not match */
763 if (strncmp((char *)&dev0->id[ATA_ID_SERNO],
764 (char *)&dev1->id[ATA_ID_SERNO], ATA_ID_SERNO_LEN))
765 return;
766
767 /* No serial number, thankfully very rare for CF */
768 if (*(char *)&dev0->id[ATA_ID_SERNO] == 0)
769 return;
770
771 /* Appears to be an IDE flash adapter with decode bugs */
772 printk(KERN_WARNING "ide-probe: ignoring undecoded slave\n");
773
774 dev1->present = 0;
775 }
776
777 EXPORT_SYMBOL_GPL(ide_undecoded_slave);
778
779 static int ide_probe_port(ide_hwif_t *hwif)
780 {
781 unsigned long flags;
782 unsigned int irqd;
783 int unit, rc = -ENODEV;
784
785 BUG_ON(hwif->present);
786
787 if (hwif->drives[0].noprobe && hwif->drives[1].noprobe)
788 return -EACCES;
789
790 /*
791 * We must always disable IRQ, as probe_for_drive will assert IRQ, but
792 * we'll install our IRQ driver much later...
793 */
794 irqd = hwif->irq;
795 if (irqd)
796 disable_irq(hwif->irq);
797
798 local_irq_set(flags);
799
800 if (ide_port_wait_ready(hwif) == -EBUSY)
801 printk(KERN_DEBUG "%s: Wait for ready failed before probe !\n", hwif->name);
802
803 /*
804 * Second drive should only exist if first drive was found,
805 * but a lot of cdrom drives are configured as single slaves.
806 */
807 for (unit = 0; unit < MAX_DRIVES; ++unit) {
808 ide_drive_t *drive = &hwif->drives[unit];
809 drive->dn = (hwif->channel ? 2 : 0) + unit;
810 (void) probe_for_drive(drive);
811 if (drive->present)
812 rc = 0;
813 }
814
815 local_irq_restore(flags);
816
817 /*
818 * Use cached IRQ number. It might be (and is...) changed by probe
819 * code above
820 */
821 if (irqd)
822 enable_irq(irqd);
823
824 return rc;
825 }
826
827 static void ide_port_tune_devices(ide_hwif_t *hwif)
828 {
829 const struct ide_port_ops *port_ops = hwif->port_ops;
830 int unit;
831
832 for (unit = 0; unit < MAX_DRIVES; unit++) {
833 ide_drive_t *drive = &hwif->drives[unit];
834
835 if (drive->present && port_ops && port_ops->quirkproc)
836 port_ops->quirkproc(drive);
837 }
838
839 for (unit = 0; unit < MAX_DRIVES; ++unit) {
840 ide_drive_t *drive = &hwif->drives[unit];
841
842 if (drive->present) {
843 ide_set_max_pio(drive);
844
845 drive->nice1 = 1;
846
847 if (hwif->dma_ops)
848 ide_set_dma(drive);
849 }
850 }
851
852 for (unit = 0; unit < MAX_DRIVES; ++unit) {
853 ide_drive_t *drive = &hwif->drives[unit];
854
855 if (hwif->host_flags & IDE_HFLAG_NO_IO_32BIT)
856 drive->no_io_32bit = 1;
857 else
858 drive->no_io_32bit = drive->id[ATA_ID_DWORD_IO] ? 1 : 0;
859 }
860 }
861
862 #if MAX_HWIFS > 1
863 /*
864 * save_match() is used to simplify logic in init_irq() below.
865 *
866 * A loophole here is that we may not know about a particular
867 * hwif's irq until after that hwif is actually probed/initialized..
868 * This could be a problem for the case where an hwif is on a
869 * dual interface that requires serialization (eg. cmd640) and another
870 * hwif using one of the same irqs is initialized beforehand.
871 *
872 * This routine detects and reports such situations, but does not fix them.
873 */
874 static void save_match(ide_hwif_t *hwif, ide_hwif_t *new, ide_hwif_t **match)
875 {
876 ide_hwif_t *m = *match;
877
878 if (m && m->hwgroup && m->hwgroup != new->hwgroup) {
879 if (!new->hwgroup)
880 return;
881 printk(KERN_WARNING "%s: potential IRQ problem with %s and %s\n",
882 hwif->name, new->name, m->name);
883 }
884 if (!m || m->irq != hwif->irq) /* don't undo a prior perfect match */
885 *match = new;
886 }
887 #endif /* MAX_HWIFS > 1 */
888
889 /*
890 * init request queue
891 */
892 static int ide_init_queue(ide_drive_t *drive)
893 {
894 struct request_queue *q;
895 ide_hwif_t *hwif = HWIF(drive);
896 int max_sectors = 256;
897 int max_sg_entries = PRD_ENTRIES;
898
899 /*
900 * Our default set up assumes the normal IDE case,
901 * that is 64K segmenting, standard PRD setup
902 * and LBA28. Some drivers then impose their own
903 * limits and LBA48 we could raise it but as yet
904 * do not.
905 */
906
907 q = blk_init_queue_node(do_ide_request, &ide_lock, hwif_to_node(hwif));
908 if (!q)
909 return 1;
910
911 q->queuedata = drive;
912 blk_queue_segment_boundary(q, 0xffff);
913
914 if (hwif->rqsize < max_sectors)
915 max_sectors = hwif->rqsize;
916 blk_queue_max_sectors(q, max_sectors);
917
918 #ifdef CONFIG_PCI
919 /* When we have an IOMMU, we may have a problem where pci_map_sg()
920 * creates segments that don't completely match our boundary
921 * requirements and thus need to be broken up again. Because it
922 * doesn't align properly either, we may actually have to break up
923 * to more segments than what was we got in the first place, a max
924 * worst case is twice as many.
925 * This will be fixed once we teach pci_map_sg() about our boundary
926 * requirements, hopefully soon. *FIXME*
927 */
928 if (!PCI_DMA_BUS_IS_PHYS)
929 max_sg_entries >>= 1;
930 #endif /* CONFIG_PCI */
931
932 blk_queue_max_hw_segments(q, max_sg_entries);
933 blk_queue_max_phys_segments(q, max_sg_entries);
934
935 /* assign drive queue */
936 drive->queue = q;
937
938 /* needs drive->queue to be set */
939 ide_toggle_bounce(drive, 1);
940
941 return 0;
942 }
943
944 static void ide_add_drive_to_hwgroup(ide_drive_t *drive)
945 {
946 ide_hwgroup_t *hwgroup = drive->hwif->hwgroup;
947
948 spin_lock_irq(&ide_lock);
949 if (!hwgroup->drive) {
950 /* first drive for hwgroup. */
951 drive->next = drive;
952 hwgroup->drive = drive;
953 hwgroup->hwif = HWIF(hwgroup->drive);
954 } else {
955 drive->next = hwgroup->drive->next;
956 hwgroup->drive->next = drive;
957 }
958 spin_unlock_irq(&ide_lock);
959 }
960
961 /*
962 * For any present drive:
963 * - allocate the block device queue
964 * - link drive into the hwgroup
965 */
966 static void ide_port_setup_devices(ide_hwif_t *hwif)
967 {
968 int i;
969
970 mutex_lock(&ide_cfg_mtx);
971 for (i = 0; i < MAX_DRIVES; i++) {
972 ide_drive_t *drive = &hwif->drives[i];
973
974 if (!drive->present)
975 continue;
976
977 if (ide_init_queue(drive)) {
978 printk(KERN_ERR "ide: failed to init %s\n",
979 drive->name);
980 continue;
981 }
982
983 ide_add_drive_to_hwgroup(drive);
984 }
985 mutex_unlock(&ide_cfg_mtx);
986 }
987
988 static ide_hwif_t *ide_ports[MAX_HWIFS];
989
990 void ide_remove_port_from_hwgroup(ide_hwif_t *hwif)
991 {
992 ide_hwgroup_t *hwgroup = hwif->hwgroup;
993
994 ide_ports[hwif->index] = NULL;
995
996 spin_lock_irq(&ide_lock);
997 /*
998 * Remove us from the hwgroup, and free
999 * the hwgroup if we were the only member
1000 */
1001 if (hwif->next == hwif) {
1002 BUG_ON(hwgroup->hwif != hwif);
1003 kfree(hwgroup);
1004 } else {
1005 /* There is another interface in hwgroup.
1006 * Unlink us, and set hwgroup->drive and ->hwif to
1007 * something sane.
1008 */
1009 ide_hwif_t *g = hwgroup->hwif;
1010
1011 while (g->next != hwif)
1012 g = g->next;
1013 g->next = hwif->next;
1014 if (hwgroup->hwif == hwif) {
1015 /* Chose a random hwif for hwgroup->hwif.
1016 * It's guaranteed that there are no drives
1017 * left in the hwgroup.
1018 */
1019 BUG_ON(hwgroup->drive != NULL);
1020 hwgroup->hwif = g;
1021 }
1022 BUG_ON(hwgroup->hwif == hwif);
1023 }
1024 spin_unlock_irq(&ide_lock);
1025 }
1026
1027 /*
1028 * This routine sets up the irq for an ide interface, and creates a new
1029 * hwgroup for the irq/hwif if none was previously assigned.
1030 *
1031 * Much of the code is for correctly detecting/handling irq sharing
1032 * and irq serialization situations. This is somewhat complex because
1033 * it handles static as well as dynamic (PCMCIA) IDE interfaces.
1034 */
1035 static int init_irq (ide_hwif_t *hwif)
1036 {
1037 struct ide_io_ports *io_ports = &hwif->io_ports;
1038 unsigned int index;
1039 ide_hwgroup_t *hwgroup;
1040 ide_hwif_t *match = NULL;
1041
1042
1043 BUG_ON(in_interrupt());
1044 BUG_ON(irqs_disabled());
1045 BUG_ON(hwif == NULL);
1046
1047 mutex_lock(&ide_cfg_mtx);
1048 hwif->hwgroup = NULL;
1049 #if MAX_HWIFS > 1
1050 /*
1051 * Group up with any other hwifs that share our irq(s).
1052 */
1053 for (index = 0; index < MAX_HWIFS; index++) {
1054 ide_hwif_t *h = ide_ports[index];
1055
1056 if (h && h->hwgroup) { /* scan only initialized ports */
1057 if (hwif->irq == h->irq) {
1058 hwif->sharing_irq = h->sharing_irq = 1;
1059 if (hwif->chipset != ide_pci ||
1060 h->chipset != ide_pci) {
1061 save_match(hwif, h, &match);
1062 }
1063 }
1064 if (hwif->serialized) {
1065 if (hwif->mate && hwif->mate->irq == h->irq)
1066 save_match(hwif, h, &match);
1067 }
1068 if (h->serialized) {
1069 if (h->mate && hwif->irq == h->mate->irq)
1070 save_match(hwif, h, &match);
1071 }
1072 }
1073 }
1074 #endif /* MAX_HWIFS > 1 */
1075 /*
1076 * If we are still without a hwgroup, then form a new one
1077 */
1078 if (match) {
1079 hwgroup = match->hwgroup;
1080 hwif->hwgroup = hwgroup;
1081 /*
1082 * Link us into the hwgroup.
1083 * This must be done early, do ensure that unexpected_intr
1084 * can find the hwif and prevent irq storms.
1085 * No drives are attached to the new hwif, choose_drive
1086 * can't do anything stupid (yet).
1087 * Add ourself as the 2nd entry to the hwgroup->hwif
1088 * linked list, the first entry is the hwif that owns
1089 * hwgroup->handler - do not change that.
1090 */
1091 spin_lock_irq(&ide_lock);
1092 hwif->next = hwgroup->hwif->next;
1093 hwgroup->hwif->next = hwif;
1094 BUG_ON(hwif->next == hwif);
1095 spin_unlock_irq(&ide_lock);
1096 } else {
1097 hwgroup = kmalloc_node(sizeof(*hwgroup), GFP_KERNEL|__GFP_ZERO,
1098 hwif_to_node(hwif));
1099 if (hwgroup == NULL)
1100 goto out_up;
1101
1102 hwif->hwgroup = hwgroup;
1103 hwgroup->hwif = hwif->next = hwif;
1104
1105 init_timer(&hwgroup->timer);
1106 hwgroup->timer.function = &ide_timer_expiry;
1107 hwgroup->timer.data = (unsigned long) hwgroup;
1108 }
1109
1110 ide_ports[hwif->index] = hwif;
1111
1112 /*
1113 * Allocate the irq, if not already obtained for another hwif
1114 */
1115 if (!match || match->irq != hwif->irq) {
1116 int sa = 0;
1117 #if defined(__mc68000__)
1118 sa = IRQF_SHARED;
1119 #endif /* __mc68000__ */
1120
1121 if (IDE_CHIPSET_IS_PCI(hwif->chipset))
1122 sa = IRQF_SHARED;
1123
1124 if (io_ports->ctl_addr)
1125 hwif->tp_ops->set_irq(hwif, 1);
1126
1127 if (request_irq(hwif->irq,&ide_intr,sa,hwif->name,hwgroup))
1128 goto out_unlink;
1129 }
1130
1131 if (!hwif->rqsize) {
1132 if ((hwif->host_flags & IDE_HFLAG_NO_LBA48) ||
1133 (hwif->host_flags & IDE_HFLAG_NO_LBA48_DMA))
1134 hwif->rqsize = 256;
1135 else
1136 hwif->rqsize = 65536;
1137 }
1138
1139 #if !defined(__mc68000__)
1140 printk(KERN_INFO "%s at 0x%03lx-0x%03lx,0x%03lx on irq %d", hwif->name,
1141 io_ports->data_addr, io_ports->status_addr,
1142 io_ports->ctl_addr, hwif->irq);
1143 #else
1144 printk(KERN_INFO "%s at 0x%08lx on irq %d", hwif->name,
1145 io_ports->data_addr, hwif->irq);
1146 #endif /* __mc68000__ */
1147 if (match)
1148 printk(KERN_CONT " (%sed with %s)",
1149 hwif->sharing_irq ? "shar" : "serializ", match->name);
1150 printk(KERN_CONT "\n");
1151
1152 mutex_unlock(&ide_cfg_mtx);
1153 return 0;
1154 out_unlink:
1155 ide_remove_port_from_hwgroup(hwif);
1156 out_up:
1157 mutex_unlock(&ide_cfg_mtx);
1158 return 1;
1159 }
1160
1161 static int ata_lock(dev_t dev, void *data)
1162 {
1163 /* FIXME: we want to pin hwif down */
1164 return 0;
1165 }
1166
1167 static struct kobject *ata_probe(dev_t dev, int *part, void *data)
1168 {
1169 ide_hwif_t *hwif = data;
1170 int unit = *part >> PARTN_BITS;
1171 ide_drive_t *drive = &hwif->drives[unit];
1172 if (!drive->present)
1173 return NULL;
1174
1175 if (drive->media == ide_disk)
1176 request_module("ide-disk");
1177 if (drive->scsi)
1178 request_module("ide-scsi");
1179 if (drive->media == ide_cdrom || drive->media == ide_optical)
1180 request_module("ide-cd");
1181 if (drive->media == ide_tape)
1182 request_module("ide-tape");
1183 if (drive->media == ide_floppy)
1184 request_module("ide-floppy");
1185
1186 return NULL;
1187 }
1188
1189 static struct kobject *exact_match(dev_t dev, int *part, void *data)
1190 {
1191 struct gendisk *p = data;
1192 *part &= (1 << PARTN_BITS) - 1;
1193 return &disk_to_dev(p)->kobj;
1194 }
1195
1196 static int exact_lock(dev_t dev, void *data)
1197 {
1198 struct gendisk *p = data;
1199
1200 if (!get_disk(p))
1201 return -1;
1202 return 0;
1203 }
1204
1205 void ide_register_region(struct gendisk *disk)
1206 {
1207 blk_register_region(MKDEV(disk->major, disk->first_minor),
1208 disk->minors, NULL, exact_match, exact_lock, disk);
1209 }
1210
1211 EXPORT_SYMBOL_GPL(ide_register_region);
1212
1213 void ide_unregister_region(struct gendisk *disk)
1214 {
1215 blk_unregister_region(MKDEV(disk->major, disk->first_minor),
1216 disk->minors);
1217 }
1218
1219 EXPORT_SYMBOL_GPL(ide_unregister_region);
1220
1221 void ide_init_disk(struct gendisk *disk, ide_drive_t *drive)
1222 {
1223 ide_hwif_t *hwif = drive->hwif;
1224 unsigned int unit = (drive->select.all >> 4) & 1;
1225
1226 disk->major = hwif->major;
1227 disk->first_minor = unit << PARTN_BITS;
1228 sprintf(disk->disk_name, "hd%c", 'a' + hwif->index * MAX_DRIVES + unit);
1229 disk->queue = drive->queue;
1230 }
1231
1232 EXPORT_SYMBOL_GPL(ide_init_disk);
1233
1234 static void ide_remove_drive_from_hwgroup(ide_drive_t *drive)
1235 {
1236 ide_hwgroup_t *hwgroup = drive->hwif->hwgroup;
1237
1238 if (drive == drive->next) {
1239 /* special case: last drive from hwgroup. */
1240 BUG_ON(hwgroup->drive != drive);
1241 hwgroup->drive = NULL;
1242 } else {
1243 ide_drive_t *walk;
1244
1245 walk = hwgroup->drive;
1246 while (walk->next != drive)
1247 walk = walk->next;
1248 walk->next = drive->next;
1249 if (hwgroup->drive == drive) {
1250 hwgroup->drive = drive->next;
1251 hwgroup->hwif = hwgroup->drive->hwif;
1252 }
1253 }
1254 BUG_ON(hwgroup->drive == drive);
1255 }
1256
1257 static void drive_release_dev (struct device *dev)
1258 {
1259 ide_drive_t *drive = container_of(dev, ide_drive_t, gendev);
1260
1261 ide_proc_unregister_device(drive);
1262
1263 spin_lock_irq(&ide_lock);
1264 ide_remove_drive_from_hwgroup(drive);
1265 kfree(drive->id);
1266 drive->id = NULL;
1267 drive->present = 0;
1268 /* Messed up locking ... */
1269 spin_unlock_irq(&ide_lock);
1270 blk_cleanup_queue(drive->queue);
1271 spin_lock_irq(&ide_lock);
1272 drive->queue = NULL;
1273 spin_unlock_irq(&ide_lock);
1274
1275 complete(&drive->gendev_rel_comp);
1276 }
1277
1278 static int hwif_init(ide_hwif_t *hwif)
1279 {
1280 int old_irq;
1281
1282 if (!hwif->irq) {
1283 hwif->irq = __ide_default_irq(hwif->io_ports.data_addr);
1284 if (!hwif->irq) {
1285 printk(KERN_ERR "%s: disabled, no IRQ\n", hwif->name);
1286 return 0;
1287 }
1288 }
1289
1290 if (register_blkdev(hwif->major, hwif->name))
1291 return 0;
1292
1293 if (!hwif->sg_max_nents)
1294 hwif->sg_max_nents = PRD_ENTRIES;
1295
1296 hwif->sg_table = kmalloc(sizeof(struct scatterlist)*hwif->sg_max_nents,
1297 GFP_KERNEL);
1298 if (!hwif->sg_table) {
1299 printk(KERN_ERR "%s: unable to allocate SG table.\n", hwif->name);
1300 goto out;
1301 }
1302
1303 sg_init_table(hwif->sg_table, hwif->sg_max_nents);
1304
1305 if (init_irq(hwif) == 0)
1306 goto done;
1307
1308 old_irq = hwif->irq;
1309 /*
1310 * It failed to initialise. Find the default IRQ for
1311 * this port and try that.
1312 */
1313 hwif->irq = __ide_default_irq(hwif->io_ports.data_addr);
1314 if (!hwif->irq) {
1315 printk(KERN_ERR "%s: disabled, unable to get IRQ %d\n",
1316 hwif->name, old_irq);
1317 goto out;
1318 }
1319 if (init_irq(hwif)) {
1320 printk(KERN_ERR "%s: probed IRQ %d and default IRQ %d failed\n",
1321 hwif->name, old_irq, hwif->irq);
1322 goto out;
1323 }
1324 printk(KERN_WARNING "%s: probed IRQ %d failed, using default\n",
1325 hwif->name, hwif->irq);
1326
1327 done:
1328 blk_register_region(MKDEV(hwif->major, 0), MAX_DRIVES << PARTN_BITS,
1329 THIS_MODULE, ata_probe, ata_lock, hwif);
1330 return 1;
1331
1332 out:
1333 unregister_blkdev(hwif->major, hwif->name);
1334 return 0;
1335 }
1336
1337 static void hwif_register_devices(ide_hwif_t *hwif)
1338 {
1339 unsigned int i;
1340
1341 for (i = 0; i < MAX_DRIVES; i++) {
1342 ide_drive_t *drive = &hwif->drives[i];
1343 struct device *dev = &drive->gendev;
1344 int ret;
1345
1346 if (!drive->present)
1347 continue;
1348
1349 ide_add_generic_settings(drive);
1350
1351 snprintf(dev->bus_id, BUS_ID_SIZE, "%u.%u", hwif->index, i);
1352 dev->parent = &hwif->gendev;
1353 dev->bus = &ide_bus_type;
1354 dev->driver_data = drive;
1355 dev->release = drive_release_dev;
1356
1357 ret = device_register(dev);
1358 if (ret < 0)
1359 printk(KERN_WARNING "IDE: %s: device_register error: "
1360 "%d\n", __func__, ret);
1361 }
1362 }
1363
1364 static void ide_port_init_devices(ide_hwif_t *hwif)
1365 {
1366 const struct ide_port_ops *port_ops = hwif->port_ops;
1367 int i;
1368
1369 for (i = 0; i < MAX_DRIVES; i++) {
1370 ide_drive_t *drive = &hwif->drives[i];
1371
1372 if (hwif->host_flags & IDE_HFLAG_IO_32BIT)
1373 drive->io_32bit = 1;
1374 if (hwif->host_flags & IDE_HFLAG_UNMASK_IRQS)
1375 drive->unmask = 1;
1376 if (hwif->host_flags & IDE_HFLAG_NO_UNMASK_IRQS)
1377 drive->no_unmask = 1;
1378
1379 if (port_ops && port_ops->init_dev)
1380 port_ops->init_dev(drive);
1381 }
1382 }
1383
1384 static void ide_init_port(ide_hwif_t *hwif, unsigned int port,
1385 const struct ide_port_info *d)
1386 {
1387 hwif->channel = port;
1388
1389 if (d->chipset)
1390 hwif->chipset = d->chipset;
1391
1392 if (d->init_iops)
1393 d->init_iops(hwif);
1394
1395 if ((!hwif->irq && (d->host_flags & IDE_HFLAG_LEGACY_IRQS)) ||
1396 (d->host_flags & IDE_HFLAG_FORCE_LEGACY_IRQS))
1397 hwif->irq = port ? 15 : 14;
1398
1399 /* ->host_flags may be set by ->init_iops (or even earlier...) */
1400 hwif->host_flags |= d->host_flags;
1401 hwif->pio_mask = d->pio_mask;
1402
1403 if (d->tp_ops)
1404 hwif->tp_ops = d->tp_ops;
1405
1406 /* ->set_pio_mode for DTC2278 is currently limited to port 0 */
1407 if (hwif->chipset != ide_dtc2278 || hwif->channel == 0)
1408 hwif->port_ops = d->port_ops;
1409
1410 hwif->swdma_mask = d->swdma_mask;
1411 hwif->mwdma_mask = d->mwdma_mask;
1412 hwif->ultra_mask = d->udma_mask;
1413
1414 if ((d->host_flags & IDE_HFLAG_NO_DMA) == 0) {
1415 int rc;
1416
1417 if (d->init_dma)
1418 rc = d->init_dma(hwif, d);
1419 else
1420 rc = ide_hwif_setup_dma(hwif, d);
1421
1422 if (rc < 0) {
1423 printk(KERN_INFO "%s: DMA disabled\n", hwif->name);
1424 hwif->dma_base = 0;
1425 hwif->swdma_mask = 0;
1426 hwif->mwdma_mask = 0;
1427 hwif->ultra_mask = 0;
1428 } else if (d->dma_ops)
1429 hwif->dma_ops = d->dma_ops;
1430 }
1431
1432 if ((d->host_flags & IDE_HFLAG_SERIALIZE) ||
1433 ((d->host_flags & IDE_HFLAG_SERIALIZE_DMA) && hwif->dma_base)) {
1434 if (hwif->mate)
1435 hwif->mate->serialized = hwif->serialized = 1;
1436 }
1437
1438 if (d->host_flags & IDE_HFLAG_RQSIZE_256)
1439 hwif->rqsize = 256;
1440
1441 /* call chipset specific routine for each enabled port */
1442 if (d->init_hwif)
1443 d->init_hwif(hwif);
1444 }
1445
1446 static void ide_port_cable_detect(ide_hwif_t *hwif)
1447 {
1448 const struct ide_port_ops *port_ops = hwif->port_ops;
1449
1450 if (port_ops && port_ops->cable_detect && (hwif->ultra_mask & 0x78)) {
1451 if (hwif->cbl != ATA_CBL_PATA40_SHORT)
1452 hwif->cbl = port_ops->cable_detect(hwif);
1453 }
1454 }
1455
1456 static ssize_t store_delete_devices(struct device *portdev,
1457 struct device_attribute *attr,
1458 const char *buf, size_t n)
1459 {
1460 ide_hwif_t *hwif = dev_get_drvdata(portdev);
1461
1462 if (strncmp(buf, "1", n))
1463 return -EINVAL;
1464
1465 ide_port_unregister_devices(hwif);
1466
1467 return n;
1468 };
1469
1470 static DEVICE_ATTR(delete_devices, S_IWUSR, NULL, store_delete_devices);
1471
1472 static ssize_t store_scan(struct device *portdev,
1473 struct device_attribute *attr,
1474 const char *buf, size_t n)
1475 {
1476 ide_hwif_t *hwif = dev_get_drvdata(portdev);
1477
1478 if (strncmp(buf, "1", n))
1479 return -EINVAL;
1480
1481 ide_port_unregister_devices(hwif);
1482 ide_port_scan(hwif);
1483
1484 return n;
1485 };
1486
1487 static DEVICE_ATTR(scan, S_IWUSR, NULL, store_scan);
1488
1489 static struct device_attribute *ide_port_attrs[] = {
1490 &dev_attr_delete_devices,
1491 &dev_attr_scan,
1492 NULL
1493 };
1494
1495 static int ide_sysfs_register_port(ide_hwif_t *hwif)
1496 {
1497 int i, uninitialized_var(rc);
1498
1499 for (i = 0; ide_port_attrs[i]; i++) {
1500 rc = device_create_file(hwif->portdev, ide_port_attrs[i]);
1501 if (rc)
1502 break;
1503 }
1504
1505 return rc;
1506 }
1507
1508 static unsigned int ide_indexes;
1509
1510 /**
1511 * ide_find_port_slot - find free port slot
1512 * @d: IDE port info
1513 *
1514 * Return the new port slot index or -ENOENT if we are out of free slots.
1515 */
1516
1517 static int ide_find_port_slot(const struct ide_port_info *d)
1518 {
1519 int idx = -ENOENT;
1520 u8 bootable = (d && (d->host_flags & IDE_HFLAG_NON_BOOTABLE)) ? 0 : 1;
1521 u8 i = (d && (d->host_flags & IDE_HFLAG_QD_2ND_PORT)) ? 1 : 0;;
1522
1523 /*
1524 * Claim an unassigned slot.
1525 *
1526 * Give preference to claiming other slots before claiming ide0/ide1,
1527 * just in case there's another interface yet-to-be-scanned
1528 * which uses ports 0x1f0/0x170 (the ide0/ide1 defaults).
1529 *
1530 * Unless there is a bootable card that does not use the standard
1531 * ports 0x1f0/0x170 (the ide0/ide1 defaults).
1532 */
1533 mutex_lock(&ide_cfg_mtx);
1534 if (MAX_HWIFS == 1) {
1535 if (ide_indexes == 0 && i == 0)
1536 idx = 1;
1537 } else {
1538 if (bootable) {
1539 if ((ide_indexes | i) != (1 << MAX_HWIFS) - 1)
1540 idx = ffz(ide_indexes | i);
1541 } else {
1542 if ((ide_indexes | 3) != (1 << MAX_HWIFS) - 1)
1543 idx = ffz(ide_indexes | 3);
1544 else if ((ide_indexes & 3) != 3)
1545 idx = ffz(ide_indexes);
1546 }
1547 }
1548 if (idx >= 0)
1549 ide_indexes |= (1 << idx);
1550 mutex_unlock(&ide_cfg_mtx);
1551
1552 return idx;
1553 }
1554
1555 static void ide_free_port_slot(int idx)
1556 {
1557 mutex_lock(&ide_cfg_mtx);
1558 ide_indexes &= ~(1 << idx);
1559 mutex_unlock(&ide_cfg_mtx);
1560 }
1561
1562 struct ide_host *ide_host_alloc_all(const struct ide_port_info *d,
1563 hw_regs_t **hws)
1564 {
1565 struct ide_host *host;
1566 int i;
1567
1568 host = kzalloc(sizeof(*host), GFP_KERNEL);
1569 if (host == NULL)
1570 return NULL;
1571
1572 for (i = 0; i < MAX_HWIFS; i++) {
1573 ide_hwif_t *hwif;
1574 int idx;
1575
1576 if (hws[i] == NULL)
1577 continue;
1578
1579 hwif = kzalloc(sizeof(*hwif), GFP_KERNEL);
1580 if (hwif == NULL)
1581 continue;
1582
1583 idx = ide_find_port_slot(d);
1584 if (idx < 0) {
1585 printk(KERN_ERR "%s: no free slot for interface\n",
1586 d ? d->name : "ide");
1587 kfree(hwif);
1588 continue;
1589 }
1590
1591 ide_init_port_data(hwif, idx);
1592
1593 hwif->host = host;
1594
1595 host->ports[i] = hwif;
1596 host->n_ports++;
1597 }
1598
1599 if (host->n_ports == 0) {
1600 kfree(host);
1601 return NULL;
1602 }
1603
1604 if (hws[0])
1605 host->dev[0] = hws[0]->dev;
1606
1607 if (d)
1608 host->host_flags = d->host_flags;
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);