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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
44
45
46
47
48
49
50
51static void generic_id(ide_drive_t *drive)
52{
53 u16 *id = drive->id;
54
55 id[ATA_ID_CUR_CYLS] = id[ATA_ID_CYLS] = drive->cyl;
56 id[ATA_ID_CUR_HEADS] = id[ATA_ID_HEADS] = drive->head;
57 id[ATA_ID_CUR_SECTORS] = id[ATA_ID_SECTORS] = drive->sect;
58}
59
60static void ide_disk_init_chs(ide_drive_t *drive)
61{
62 u16 *id = drive->id;
63
64
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
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
79 if (drive->head > 16 && id[ATA_ID_HEADS] && id[ATA_ID_HEADS] <= 16) {
80 drive->cyl = id[ATA_ID_CYLS];
81 drive->head = id[ATA_ID_HEADS];
82 drive->sect = id[ATA_ID_SECTORS];
83 }
84}
85
86static void ide_disk_init_mult_count(ide_drive_t *drive)
87{
88 u16 *id = drive->id;
89 u8 max_multsect = id[ATA_ID_MAX_MULTSECT] & 0xff;
90
91 if (max_multsect) {
92 if ((max_multsect / 2) > 1)
93 id[ATA_ID_MULTSECT] = max_multsect | 0x100;
94 else
95 id[ATA_ID_MULTSECT] &= ~0x1ff;
96
97 drive->mult_req = id[ATA_ID_MULTSECT] & 0xff;
98
99 if (drive->mult_req)
100 drive->special_flags |= IDE_SFLAG_SET_MULTMODE;
101 }
102}
103
104static void ide_classify_ata_dev(ide_drive_t *drive)
105{
106 u16 *id = drive->id;
107 char *m = (char *)&id[ATA_ID_PROD];
108 int is_cfa = ata_id_is_cfa(id);
109
110
111 if (is_cfa == 0 && (id[ATA_ID_CONFIG] & (1 << 7)))
112 drive->dev_flags |= IDE_DFLAG_REMOVABLE;
113
114 drive->media = ide_disk;
115
116 if (!ata_id_has_unload(drive->id))
117 drive->dev_flags |= IDE_DFLAG_NO_UNLOAD;
118
119 printk(KERN_INFO "%s: %s, %s DISK drive\n", drive->name, m,
120 is_cfa ? "CFA" : "ATA");
121}
122
123static void ide_classify_atapi_dev(ide_drive_t *drive)
124{
125 u16 *id = drive->id;
126 char *m = (char *)&id[ATA_ID_PROD];
127 u8 type = (id[ATA_ID_CONFIG] >> 8) & 0x1f;
128
129 printk(KERN_INFO "%s: %s, ATAPI ", drive->name, m);
130 switch (type) {
131 case ide_floppy:
132 if (!strstr(m, "CD-ROM")) {
133 if (!strstr(m, "oppy") &&
134 !strstr(m, "poyp") &&
135 !strstr(m, "ZIP"))
136 printk(KERN_CONT "cdrom or floppy?, assuming ");
137 if (drive->media != ide_cdrom) {
138 printk(KERN_CONT "FLOPPY");
139 drive->dev_flags |= IDE_DFLAG_REMOVABLE;
140 break;
141 }
142 }
143
144 type = ide_cdrom;
145 case ide_cdrom:
146 drive->dev_flags |= IDE_DFLAG_REMOVABLE;
147#ifdef CONFIG_PPC
148
149 if (!strstr(m, "CD-ROM") && strstr(m, "ZIP")) {
150 printk(KERN_CONT "FLOPPY");
151 type = ide_floppy;
152 break;
153 }
154#endif
155 printk(KERN_CONT "CD/DVD-ROM");
156 break;
157 case ide_tape:
158 printk(KERN_CONT "TAPE");
159 break;
160 case ide_optical:
161 printk(KERN_CONT "OPTICAL");
162 drive->dev_flags |= IDE_DFLAG_REMOVABLE;
163 break;
164 default:
165 printk(KERN_CONT "UNKNOWN (type %d)", type);
166 break;
167 }
168
169 printk(KERN_CONT " drive\n");
170 drive->media = type;
171
172 drive->ready_stat = 0;
173 if (ata_id_cdb_intr(id))
174 drive->atapi_flags |= IDE_AFLAG_DRQ_INTERRUPT;
175 drive->dev_flags |= IDE_DFLAG_DOORLOCKING;
176
177 drive->dev_flags |= IDE_DFLAG_NO_UNLOAD;
178}
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189
190
191static void do_identify(ide_drive_t *drive, u8 cmd, u16 *id)
192{
193 ide_hwif_t *hwif = drive->hwif;
194 char *m = (char *)&id[ATA_ID_PROD];
195 unsigned long flags;
196 int bswap = 1;
197
198
199 local_irq_save(flags);
200
201 hwif->tp_ops->input_data(drive, NULL, id, SECTOR_SIZE);
202 local_irq_restore(flags);
203
204 drive->dev_flags |= IDE_DFLAG_ID_READ;
205#ifdef DEBUG
206 printk(KERN_INFO "%s: dumping identify data\n", drive->name);
207 ide_dump_identify((u8 *)id);
208#endif
209 ide_fix_driveid(id);
210
211
212
213
214
215 if (cmd == ATA_CMD_ID_ATAPI) {
216 if ((m[0] == 'N' && m[1] == 'E') ||
217 (m[0] == 'F' && m[1] == 'X') ||
218 (m[0] == 'P' && m[1] == 'i'))
219
220 bswap ^= 1;
221 }
222
223 ide_fixstring(m, ATA_ID_PROD_LEN, bswap);
224 ide_fixstring((char *)&id[ATA_ID_FW_REV], ATA_ID_FW_REV_LEN, bswap);
225 ide_fixstring((char *)&id[ATA_ID_SERNO], ATA_ID_SERNO_LEN, bswap);
226
227
228 m[ATA_ID_PROD_LEN - 1] = '\0';
229
230 if (strstr(m, "E X A B Y T E N E S T"))
231 drive->dev_flags &= ~IDE_DFLAG_PRESENT;
232 else
233 drive->dev_flags |= IDE_DFLAG_PRESENT;
234}
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249
250int ide_dev_read_id(ide_drive_t *drive, u8 cmd, u16 *id, int irq_ctx)
251{
252 ide_hwif_t *hwif = drive->hwif;
253 struct ide_io_ports *io_ports = &hwif->io_ports;
254 const struct ide_tp_ops *tp_ops = hwif->tp_ops;
255 int use_altstatus = 0, rc;
256 unsigned long timeout;
257 u8 s = 0, a = 0;
258
259
260
261
262
263 if (io_ports->ctl_addr)
264 tp_ops->write_devctl(hwif, ATA_NIEN | ATA_DEVCTL_OBS);
265
266
267 if (irq_ctx)
268 mdelay(50);
269 else
270 msleep(50);
271
272 if (io_ports->ctl_addr &&
273 (hwif->host_flags & IDE_HFLAG_BROKEN_ALTSTATUS) == 0) {
274 a = tp_ops->read_altstatus(hwif);
275 s = tp_ops->read_status(hwif);
276 if ((a ^ s) & ~ATA_IDX)
277
278 printk(KERN_INFO "%s: probing with STATUS(0x%02x) "
279 "instead of ALTSTATUS(0x%02x)\n",
280 drive->name, s, a);
281 else
282
283 use_altstatus = 1;
284 }
285
286
287
288
289 if (cmd == ATA_CMD_ID_ATAPI) {
290 struct ide_taskfile tf;
291
292 memset(&tf, 0, sizeof(tf));
293
294 tp_ops->tf_load(drive, &tf, IDE_VALID_FEATURE);
295 }
296
297
298 tp_ops->exec_command(hwif, cmd);
299
300 timeout = ((cmd == ATA_CMD_ID_ATA) ? WAIT_WORSTCASE : WAIT_PIDENTIFY) / 2;
301
302
303 if (irq_ctx) {
304 rc = __ide_wait_stat(drive, ATA_DRQ, BAD_R_STAT, timeout, &s);
305 if (rc)
306 return 1;
307 } else {
308 rc = ide_busy_sleep(drive, timeout, use_altstatus);
309 if (rc)
310 return 1;
311
312 msleep(50);
313 s = tp_ops->read_status(hwif);
314 }
315
316 if (OK_STAT(s, ATA_DRQ, BAD_R_STAT)) {
317
318 do_identify(drive, cmd, id);
319
320 rc = 0;
321
322 (void)tp_ops->read_status(hwif);
323 } else {
324
325 rc = 2;
326 }
327 return rc;
328}
329
330int ide_busy_sleep(ide_drive_t *drive, unsigned long timeout, int altstatus)
331{
332 ide_hwif_t *hwif = drive->hwif;
333 u8 stat;
334
335 timeout += jiffies;
336
337 do {
338 msleep(50);
339 stat = altstatus ? hwif->tp_ops->read_altstatus(hwif)
340 : hwif->tp_ops->read_status(hwif);
341 if ((stat & ATA_BUSY) == 0)
342 return 0;
343 } while (time_before(jiffies, timeout));
344
345 printk(KERN_ERR "%s: timeout in %s\n", drive->name, __func__);
346
347 return 1;
348}
349
350static u8 ide_read_device(ide_drive_t *drive)
351{
352 struct ide_taskfile tf;
353
354 drive->hwif->tp_ops->tf_read(drive, &tf, IDE_VALID_DEVICE);
355
356 return tf.device;
357}
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380static int do_probe (ide_drive_t *drive, u8 cmd)
381{
382 ide_hwif_t *hwif = drive->hwif;
383 const struct ide_tp_ops *tp_ops = hwif->tp_ops;
384 u16 *id = drive->id;
385 int rc;
386 u8 present = !!(drive->dev_flags & IDE_DFLAG_PRESENT), stat;
387
388
389 if (present && drive->media != ide_disk && cmd == ATA_CMD_ID_ATA)
390 return 4;
391
392#ifdef DEBUG
393 printk(KERN_INFO "probing for %s: present=%d, media=%d, probetype=%s\n",
394 drive->name, present, drive->media,
395 (cmd == ATA_CMD_ID_ATA) ? "ATA" : "ATAPI");
396#endif
397
398
399
400
401 msleep(50);
402 tp_ops->dev_select(drive);
403 msleep(50);
404
405 if (ide_read_device(drive) != drive->select && present == 0) {
406 if (drive->dn & 1) {
407
408 tp_ops->dev_select(hwif->devices[0]);
409
410 msleep(50);
411 }
412
413 return 3;
414 }
415
416 stat = tp_ops->read_status(hwif);
417
418 if (OK_STAT(stat, ATA_DRDY, ATA_BUSY) ||
419 present || cmd == ATA_CMD_ID_ATAPI) {
420 rc = ide_dev_read_id(drive, cmd, id, 0);
421 if (rc)
422
423 rc = ide_dev_read_id(drive, cmd, id, 0);
424
425 stat = tp_ops->read_status(hwif);
426
427 if (stat == (ATA_BUSY | ATA_DRDY))
428 return 4;
429
430 if (rc == 1 && cmd == ATA_CMD_ID_ATAPI) {
431 printk(KERN_ERR "%s: no response (status = 0x%02x), "
432 "resetting drive\n", drive->name, stat);
433 msleep(50);
434 tp_ops->dev_select(drive);
435 msleep(50);
436 tp_ops->exec_command(hwif, ATA_CMD_DEV_RESET);
437 (void)ide_busy_sleep(drive, WAIT_WORSTCASE, 0);
438 rc = ide_dev_read_id(drive, cmd, id, 0);
439 }
440
441
442 stat = tp_ops->read_status(hwif);
443
444 if (rc == 1)
445 printk(KERN_ERR "%s: no response (status = 0x%02x)\n",
446 drive->name, stat);
447 } else {
448
449 rc = 3;
450 }
451 if (drive->dn & 1) {
452
453 tp_ops->dev_select(hwif->devices[0]);
454 msleep(50);
455
456 (void)tp_ops->read_status(hwif);
457 }
458 return rc;
459}
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470
471
472
473static u8 probe_for_drive(ide_drive_t *drive)
474{
475 char *m;
476 int rc;
477 u8 cmd;
478
479 drive->dev_flags &= ~IDE_DFLAG_ID_READ;
480
481 m = (char *)&drive->id[ATA_ID_PROD];
482 strcpy(m, "UNKNOWN");
483
484
485 if ((drive->dev_flags & IDE_DFLAG_NOPROBE) == 0) {
486
487 cmd = ATA_CMD_ID_ATA;
488 rc = do_probe(drive, cmd);
489 if (rc >= 2) {
490
491 cmd = ATA_CMD_ID_ATAPI;
492 rc = do_probe(drive, cmd);
493 }
494
495 if ((drive->dev_flags & IDE_DFLAG_PRESENT) == 0)
496 return 0;
497
498
499 if ((drive->dev_flags & IDE_DFLAG_ID_READ) == 0) {
500 if (drive->media == ide_disk) {
501 printk(KERN_INFO "%s: non-IDE drive, CHS=%d/%d/%d\n",
502 drive->name, drive->cyl,
503 drive->head, drive->sect);
504 } else if (drive->media == ide_cdrom) {
505 printk(KERN_INFO "%s: ATAPI cdrom (?)\n", drive->name);
506 } else {
507
508 printk(KERN_WARNING "%s: Unknown device on bus refused identification. Ignoring.\n", drive->name);
509 drive->dev_flags &= ~IDE_DFLAG_PRESENT;
510 }
511 } else {
512 if (cmd == ATA_CMD_ID_ATAPI)
513 ide_classify_atapi_dev(drive);
514 else
515 ide_classify_ata_dev(drive);
516 }
517 }
518
519 if ((drive->dev_flags & IDE_DFLAG_PRESENT) == 0)
520 return 0;
521
522
523 if ((drive->dev_flags & IDE_DFLAG_ID_READ) == 0) {
524 generic_id(drive);
525 return 1;
526 }
527
528 if (drive->media == ide_disk) {
529 ide_disk_init_chs(drive);
530 ide_disk_init_mult_count(drive);
531 }
532
533 return 1;
534}
535
536static void hwif_release_dev(struct device *dev)
537{
538 ide_hwif_t *hwif = container_of(dev, ide_hwif_t, gendev);
539
540 complete(&hwif->gendev_rel_comp);
541}
542
543static int ide_register_port(ide_hwif_t *hwif)
544{
545 int ret;
546
547
548 dev_set_name(&hwif->gendev, hwif->name);
549 dev_set_drvdata(&hwif->gendev, hwif);
550 if (hwif->gendev.parent == NULL)
551 hwif->gendev.parent = hwif->dev;
552 hwif->gendev.release = hwif_release_dev;
553
554 ret = device_register(&hwif->gendev);
555 if (ret < 0) {
556 printk(KERN_WARNING "IDE: %s: device_register error: %d\n",
557 __func__, ret);
558 goto out;
559 }
560
561 hwif->portdev = device_create(ide_port_class, &hwif->gendev,
562 MKDEV(0, 0), hwif, hwif->name);
563 if (IS_ERR(hwif->portdev)) {
564 ret = PTR_ERR(hwif->portdev);
565 device_unregister(&hwif->gendev);
566 }
567out:
568 return ret;
569}
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596
597static int ide_port_wait_ready(ide_hwif_t *hwif)
598{
599 const struct ide_tp_ops *tp_ops = hwif->tp_ops;
600 ide_drive_t *drive;
601 int i, rc;
602
603 printk(KERN_DEBUG "Probing IDE interface %s...\n", hwif->name);
604
605
606
607 mdelay(2);
608
609
610
611
612
613 rc = ide_wait_not_busy(hwif, 35000);
614 if (rc)
615 return rc;
616
617
618 ide_port_for_each_dev(i, drive, hwif) {
619
620 if ((drive->dev_flags & IDE_DFLAG_NOPROBE) == 0 ||
621 (drive->dev_flags & IDE_DFLAG_PRESENT)) {
622 tp_ops->dev_select(drive);
623 tp_ops->write_devctl(hwif, ATA_DEVCTL_OBS);
624 mdelay(2);
625 rc = ide_wait_not_busy(hwif, 35000);
626 if (rc)
627 goto out;
628 } else
629 printk(KERN_DEBUG "%s: ide_wait_not_busy() skipped\n",
630 drive->name);
631 }
632out:
633
634 if (i)
635 tp_ops->dev_select(hwif->devices[0]);
636
637 return rc;
638}
639
640
641
642
643
644
645
646
647
648
649void ide_undecoded_slave(ide_drive_t *dev1)
650{
651 ide_drive_t *dev0 = dev1->hwif->devices[0];
652
653 if ((dev1->dn & 1) == 0 || (dev0->dev_flags & IDE_DFLAG_PRESENT) == 0)
654 return;
655
656
657 if (strcmp((char *)&dev0->id[ATA_ID_PROD],
658 (char *)&dev1->id[ATA_ID_PROD]))
659 return;
660
661
662 if (strncmp((char *)&dev0->id[ATA_ID_SERNO],
663 (char *)&dev1->id[ATA_ID_SERNO], ATA_ID_SERNO_LEN))
664 return;
665
666
667 if (*(char *)&dev0->id[ATA_ID_SERNO] == 0)
668 return;
669
670
671 printk(KERN_WARNING "ide-probe: ignoring undecoded slave\n");
672
673 dev1->dev_flags &= ~IDE_DFLAG_PRESENT;
674}
675
676EXPORT_SYMBOL_GPL(ide_undecoded_slave);
677
678static int ide_probe_port(ide_hwif_t *hwif)
679{
680 ide_drive_t *drive;
681 unsigned int irqd;
682 int i, rc = -ENODEV;
683
684 BUG_ON(hwif->present);
685
686 if ((hwif->devices[0]->dev_flags & IDE_DFLAG_NOPROBE) &&
687 (hwif->devices[1]->dev_flags & IDE_DFLAG_NOPROBE))
688 return -EACCES;
689
690
691
692
693
694 irqd = hwif->irq;
695 if (irqd)
696 disable_irq(hwif->irq);
697
698 rc = ide_port_wait_ready(hwif);
699 if (rc == -ENODEV) {
700 printk(KERN_INFO "%s: no devices on the port\n", hwif->name);
701 goto out;
702 } else if (rc == -EBUSY)
703 printk(KERN_ERR "%s: not ready before the probe\n", hwif->name);
704 else
705 rc = -ENODEV;
706
707
708
709
710
711 ide_port_for_each_dev(i, drive, hwif) {
712 (void) probe_for_drive(drive);
713 if (drive->dev_flags & IDE_DFLAG_PRESENT)
714 rc = 0;
715 }
716out:
717
718
719
720
721 if (irqd)
722 enable_irq(irqd);
723
724 return rc;
725}
726
727static void ide_port_tune_devices(ide_hwif_t *hwif)
728{
729 const struct ide_port_ops *port_ops = hwif->port_ops;
730 ide_drive_t *drive;
731 int i;
732
733 ide_port_for_each_present_dev(i, drive, hwif) {
734 ide_check_nien_quirk_list(drive);
735
736 if (port_ops && port_ops->quirkproc)
737 port_ops->quirkproc(drive);
738 }
739
740 ide_port_for_each_present_dev(i, drive, hwif) {
741 ide_set_max_pio(drive);
742
743 drive->dev_flags |= IDE_DFLAG_NICE1;
744
745 if (hwif->dma_ops)
746 ide_set_dma(drive);
747 }
748}
749
750
751
752
753static int ide_init_queue(ide_drive_t *drive)
754{
755 struct request_queue *q;
756 ide_hwif_t *hwif = drive->hwif;
757 int max_sectors = 256;
758 int max_sg_entries = PRD_ENTRIES;
759
760
761
762
763
764
765
766
767
768 q = blk_init_queue_node(do_ide_request, NULL, hwif_to_node(hwif));
769 if (!q)
770 return 1;
771
772 q->queuedata = drive;
773 blk_queue_segment_boundary(q, 0xffff);
774
775 if (hwif->rqsize < max_sectors)
776 max_sectors = hwif->rqsize;
777 blk_queue_max_sectors(q, max_sectors);
778
779#ifdef CONFIG_PCI
780
781
782
783
784
785
786
787
788
789 if (!PCI_DMA_BUS_IS_PHYS)
790 max_sg_entries >>= 1;
791#endif
792
793 blk_queue_max_hw_segments(q, max_sg_entries);
794 blk_queue_max_phys_segments(q, max_sg_entries);
795
796
797 drive->queue = q;
798
799
800 ide_toggle_bounce(drive, 1);
801
802 return 0;
803}
804
805static DEFINE_MUTEX(ide_cfg_mtx);
806
807
808
809
810
811static int ide_port_setup_devices(ide_hwif_t *hwif)
812{
813 ide_drive_t *drive;
814 int i, j = 0;
815
816 mutex_lock(&ide_cfg_mtx);
817 ide_port_for_each_present_dev(i, drive, hwif) {
818 if (ide_init_queue(drive)) {
819 printk(KERN_ERR "ide: failed to init %s\n",
820 drive->name);
821 drive->dev_flags &= ~IDE_DFLAG_PRESENT;
822 continue;
823 }
824
825 j++;
826 }
827 mutex_unlock(&ide_cfg_mtx);
828
829 return j;
830}
831
832static void ide_host_enable_irqs(struct ide_host *host)
833{
834 ide_hwif_t *hwif;
835 int i;
836
837 ide_host_for_each_port(i, hwif, host) {
838 if (hwif == NULL)
839 continue;
840
841
842 hwif->tp_ops->read_status(hwif);
843
844
845 if (hwif->io_ports.ctl_addr)
846 hwif->tp_ops->write_devctl(hwif, ATA_DEVCTL_OBS);
847 }
848}
849
850
851
852
853static int init_irq (ide_hwif_t *hwif)
854{
855 struct ide_io_ports *io_ports = &hwif->io_ports;
856 struct ide_host *host = hwif->host;
857 irq_handler_t irq_handler = host->irq_handler;
858 int sa = host->irq_flags;
859
860 if (irq_handler == NULL)
861 irq_handler = ide_intr;
862
863 if (request_irq(hwif->irq, irq_handler, sa, hwif->name, hwif))
864 goto out_up;
865
866#if !defined(__mc68000__)
867 printk(KERN_INFO "%s at 0x%03lx-0x%03lx,0x%03lx on irq %d", hwif->name,
868 io_ports->data_addr, io_ports->status_addr,
869 io_ports->ctl_addr, hwif->irq);
870#else
871 printk(KERN_INFO "%s at 0x%08lx on irq %d", hwif->name,
872 io_ports->data_addr, hwif->irq);
873#endif
874 if (hwif->host->host_flags & IDE_HFLAG_SERIALIZE)
875 printk(KERN_CONT " (serialized)");
876 printk(KERN_CONT "\n");
877
878 return 0;
879out_up:
880 return 1;
881}
882
883static int ata_lock(dev_t dev, void *data)
884{
885
886 return 0;
887}
888
889static struct kobject *ata_probe(dev_t dev, int *part, void *data)
890{
891 ide_hwif_t *hwif = data;
892 int unit = *part >> PARTN_BITS;
893 ide_drive_t *drive = hwif->devices[unit];
894
895 if ((drive->dev_flags & IDE_DFLAG_PRESENT) == 0)
896 return NULL;
897
898 if (drive->media == ide_disk)
899 request_module("ide-disk");
900 if (drive->media == ide_cdrom || drive->media == ide_optical)
901 request_module("ide-cd");
902 if (drive->media == ide_tape)
903 request_module("ide-tape");
904 if (drive->media == ide_floppy)
905 request_module("ide-floppy");
906
907 return NULL;
908}
909
910static struct kobject *exact_match(dev_t dev, int *part, void *data)
911{
912 struct gendisk *p = data;
913 *part &= (1 << PARTN_BITS) - 1;
914 return &disk_to_dev(p)->kobj;
915}
916
917static int exact_lock(dev_t dev, void *data)
918{
919 struct gendisk *p = data;
920
921 if (!get_disk(p))
922 return -1;
923 return 0;
924}
925
926void ide_register_region(struct gendisk *disk)
927{
928 blk_register_region(MKDEV(disk->major, disk->first_minor),
929 disk->minors, NULL, exact_match, exact_lock, disk);
930}
931
932EXPORT_SYMBOL_GPL(ide_register_region);
933
934void ide_unregister_region(struct gendisk *disk)
935{
936 blk_unregister_region(MKDEV(disk->major, disk->first_minor),
937 disk->minors);
938}
939
940EXPORT_SYMBOL_GPL(ide_unregister_region);
941
942void ide_init_disk(struct gendisk *disk, ide_drive_t *drive)
943{
944 ide_hwif_t *hwif = drive->hwif;
945 unsigned int unit = drive->dn & 1;
946
947 disk->major = hwif->major;
948 disk->first_minor = unit << PARTN_BITS;
949 sprintf(disk->disk_name, "hd%c", 'a' + hwif->index * MAX_DRIVES + unit);
950 disk->queue = drive->queue;
951}
952
953EXPORT_SYMBOL_GPL(ide_init_disk);
954
955static void drive_release_dev (struct device *dev)
956{
957 ide_drive_t *drive = container_of(dev, ide_drive_t, gendev);
958
959 ide_proc_unregister_device(drive);
960
961 blk_cleanup_queue(drive->queue);
962 drive->queue = NULL;
963
964 drive->dev_flags &= ~IDE_DFLAG_PRESENT;
965
966 complete(&drive->gendev_rel_comp);
967}
968
969static int hwif_init(ide_hwif_t *hwif)
970{
971 if (!hwif->irq) {
972 printk(KERN_ERR "%s: disabled, no IRQ\n", hwif->name);
973 return 0;
974 }
975
976 if (register_blkdev(hwif->major, hwif->name))
977 return 0;
978
979 if (!hwif->sg_max_nents)
980 hwif->sg_max_nents = PRD_ENTRIES;
981
982 hwif->sg_table = kmalloc(sizeof(struct scatterlist)*hwif->sg_max_nents,
983 GFP_KERNEL);
984 if (!hwif->sg_table) {
985 printk(KERN_ERR "%s: unable to allocate SG table.\n", hwif->name);
986 goto out;
987 }
988
989 sg_init_table(hwif->sg_table, hwif->sg_max_nents);
990
991 if (init_irq(hwif)) {
992 printk(KERN_ERR "%s: disabled, unable to get IRQ %d\n",
993 hwif->name, hwif->irq);
994 goto out;
995 }
996
997 blk_register_region(MKDEV(hwif->major, 0), MAX_DRIVES << PARTN_BITS,
998 THIS_MODULE, ata_probe, ata_lock, hwif);
999 return 1;
1000
1001out:
1002 unregister_blkdev(hwif->major, hwif->name);
1003 return 0;
1004}
1005
1006static void hwif_register_devices(ide_hwif_t *hwif)
1007{
1008 ide_drive_t *drive;
1009 unsigned int i;
1010
1011 ide_port_for_each_present_dev(i, drive, hwif) {
1012 struct device *dev = &drive->gendev;
1013 int ret;
1014
1015 dev_set_name(dev, "%u.%u", hwif->index, i);
1016 dev_set_drvdata(dev, drive);
1017 dev->parent = &hwif->gendev;
1018 dev->bus = &ide_bus_type;
1019 dev->release = drive_release_dev;
1020
1021 ret = device_register(dev);
1022 if (ret < 0)
1023 printk(KERN_WARNING "IDE: %s: device_register error: "
1024 "%d\n", __func__, ret);
1025 }
1026}
1027
1028static void ide_port_init_devices(ide_hwif_t *hwif)
1029{
1030 const struct ide_port_ops *port_ops = hwif->port_ops;
1031 ide_drive_t *drive;
1032 int i;
1033
1034 ide_port_for_each_dev(i, drive, hwif) {
1035 drive->dn = i + hwif->channel * 2;
1036
1037 if (hwif->host_flags & IDE_HFLAG_IO_32BIT)
1038 drive->io_32bit = 1;
1039 if (hwif->host_flags & IDE_HFLAG_NO_IO_32BIT)
1040 drive->dev_flags |= IDE_DFLAG_NO_IO_32BIT;
1041 if (hwif->host_flags & IDE_HFLAG_UNMASK_IRQS)
1042 drive->dev_flags |= IDE_DFLAG_UNMASK;
1043 if (hwif->host_flags & IDE_HFLAG_NO_UNMASK_IRQS)
1044 drive->dev_flags |= IDE_DFLAG_NO_UNMASK;
1045
1046 if (port_ops && port_ops->init_dev)
1047 port_ops->init_dev(drive);
1048 }
1049}
1050
1051static void ide_init_port(ide_hwif_t *hwif, unsigned int port,
1052 const struct ide_port_info *d)
1053{
1054 hwif->channel = port;
1055
1056 hwif->chipset = d->chipset ? d->chipset : ide_pci;
1057
1058 if (d->init_iops)
1059 d->init_iops(hwif);
1060
1061
1062 hwif->host_flags |= d->host_flags;
1063 hwif->pio_mask = d->pio_mask;
1064
1065 if (d->tp_ops)
1066 hwif->tp_ops = d->tp_ops;
1067
1068
1069 if ((hwif->host_flags & IDE_HFLAG_DTC2278) == 0 || hwif->channel == 0)
1070 hwif->port_ops = d->port_ops;
1071
1072 hwif->swdma_mask = d->swdma_mask;
1073 hwif->mwdma_mask = d->mwdma_mask;
1074 hwif->ultra_mask = d->udma_mask;
1075
1076 if ((d->host_flags & IDE_HFLAG_NO_DMA) == 0) {
1077 int rc;
1078
1079 hwif->dma_ops = d->dma_ops;
1080
1081 if (d->init_dma)
1082 rc = d->init_dma(hwif, d);
1083 else
1084 rc = ide_hwif_setup_dma(hwif, d);
1085
1086 if (rc < 0) {
1087 printk(KERN_INFO "%s: DMA disabled\n", hwif->name);
1088
1089 hwif->dma_ops = NULL;
1090 hwif->dma_base = 0;
1091 hwif->swdma_mask = 0;
1092 hwif->mwdma_mask = 0;
1093 hwif->ultra_mask = 0;
1094 }
1095 }
1096
1097 if ((d->host_flags & IDE_HFLAG_SERIALIZE) ||
1098 ((d->host_flags & IDE_HFLAG_SERIALIZE_DMA) && hwif->dma_base))
1099 hwif->host->host_flags |= IDE_HFLAG_SERIALIZE;
1100
1101 if (d->max_sectors)
1102 hwif->rqsize = d->max_sectors;
1103 else {
1104 if ((hwif->host_flags & IDE_HFLAG_NO_LBA48) ||
1105 (hwif->host_flags & IDE_HFLAG_NO_LBA48_DMA))
1106 hwif->rqsize = 256;
1107 else
1108 hwif->rqsize = 65536;
1109 }
1110
1111
1112 if (d->init_hwif)
1113 d->init_hwif(hwif);
1114}
1115
1116static void ide_port_cable_detect(ide_hwif_t *hwif)
1117{
1118 const struct ide_port_ops *port_ops = hwif->port_ops;
1119
1120 if (port_ops && port_ops->cable_detect && (hwif->ultra_mask & 0x78)) {
1121 if (hwif->cbl != ATA_CBL_PATA40_SHORT)
1122 hwif->cbl = port_ops->cable_detect(hwif);
1123 }
1124}
1125
1126static const u8 ide_hwif_to_major[] =
1127 { IDE0_MAJOR, IDE1_MAJOR, IDE2_MAJOR, IDE3_MAJOR, IDE4_MAJOR,
1128 IDE5_MAJOR, IDE6_MAJOR, IDE7_MAJOR, IDE8_MAJOR, IDE9_MAJOR };
1129
1130static void ide_port_init_devices_data(ide_hwif_t *hwif)
1131{
1132 ide_drive_t *drive;
1133 int i;
1134
1135 ide_port_for_each_dev(i, drive, hwif) {
1136 u8 j = (hwif->index * MAX_DRIVES) + i;
1137 u16 *saved_id = drive->id;
1138
1139 memset(drive, 0, sizeof(*drive));
1140 memset(saved_id, 0, SECTOR_SIZE);
1141 drive->id = saved_id;
1142
1143 drive->media = ide_disk;
1144 drive->select = (i << 4) | ATA_DEVICE_OBS;
1145 drive->hwif = hwif;
1146 drive->ready_stat = ATA_DRDY;
1147 drive->bad_wstat = BAD_W_STAT;
1148 drive->special_flags = IDE_SFLAG_RECALIBRATE |
1149 IDE_SFLAG_SET_GEOMETRY;
1150 drive->name[0] = 'h';
1151 drive->name[1] = 'd';
1152 drive->name[2] = 'a' + j;
1153 drive->max_failures = IDE_DEFAULT_MAX_FAILURES;
1154
1155 INIT_LIST_HEAD(&drive->list);
1156 init_completion(&drive->gendev_rel_comp);
1157 }
1158}
1159
1160static void ide_init_port_data(ide_hwif_t *hwif, unsigned int index)
1161{
1162
1163 hwif->index = index;
1164 hwif->major = ide_hwif_to_major[index];
1165
1166 hwif->name[0] = 'i';
1167 hwif->name[1] = 'd';
1168 hwif->name[2] = 'e';
1169 hwif->name[3] = '0' + index;
1170
1171 spin_lock_init(&hwif->lock);
1172
1173 init_timer(&hwif->timer);
1174 hwif->timer.function = &ide_timer_expiry;
1175 hwif->timer.data = (unsigned long)hwif;
1176
1177 init_completion(&hwif->gendev_rel_comp);
1178
1179 hwif->tp_ops = &default_tp_ops;
1180
1181 ide_port_init_devices_data(hwif);
1182}
1183
1184static void ide_init_port_hw(ide_hwif_t *hwif, struct ide_hw *hw)
1185{
1186 memcpy(&hwif->io_ports, &hw->io_ports, sizeof(hwif->io_ports));
1187 hwif->irq = hw->irq;
1188 hwif->dev = hw->dev;
1189 hwif->gendev.parent = hw->parent ? hw->parent : hw->dev;
1190 hwif->config_data = hw->config;
1191}
1192
1193static unsigned int ide_indexes;
1194
1195
1196
1197
1198
1199
1200
1201
1202static int ide_find_port_slot(const struct ide_port_info *d)
1203{
1204 int idx = -ENOENT;
1205 u8 bootable = (d && (d->host_flags & IDE_HFLAG_NON_BOOTABLE)) ? 0 : 1;
1206 u8 i = (d && (d->host_flags & IDE_HFLAG_QD_2ND_PORT)) ? 1 : 0;
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218 mutex_lock(&ide_cfg_mtx);
1219 if (bootable) {
1220 if ((ide_indexes | i) != (1 << MAX_HWIFS) - 1)
1221 idx = ffz(ide_indexes | i);
1222 } else {
1223 if ((ide_indexes | 3) != (1 << MAX_HWIFS) - 1)
1224 idx = ffz(ide_indexes | 3);
1225 else if ((ide_indexes & 3) != 3)
1226 idx = ffz(ide_indexes);
1227 }
1228 if (idx >= 0)
1229 ide_indexes |= (1 << idx);
1230 mutex_unlock(&ide_cfg_mtx);
1231
1232 return idx;
1233}
1234
1235static void ide_free_port_slot(int idx)
1236{
1237 mutex_lock(&ide_cfg_mtx);
1238 ide_indexes &= ~(1 << idx);
1239 mutex_unlock(&ide_cfg_mtx);
1240}
1241
1242static void ide_port_free_devices(ide_hwif_t *hwif)
1243{
1244 ide_drive_t *drive;
1245 int i;
1246
1247 ide_port_for_each_dev(i, drive, hwif) {
1248 kfree(drive->id);
1249 kfree(drive);
1250 }
1251}
1252
1253static int ide_port_alloc_devices(ide_hwif_t *hwif, int node)
1254{
1255 int i;
1256
1257 for (i = 0; i < MAX_DRIVES; i++) {
1258 ide_drive_t *drive;
1259
1260 drive = kzalloc_node(sizeof(*drive), GFP_KERNEL, node);
1261 if (drive == NULL)
1262 goto out_nomem;
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272 drive->id = kzalloc_node(SECTOR_SIZE, GFP_KERNEL, node);
1273 if (drive->id == NULL)
1274 goto out_nomem;
1275
1276 hwif->devices[i] = drive;
1277 }
1278 return 0;
1279
1280out_nomem:
1281 ide_port_free_devices(hwif);
1282 return -ENOMEM;
1283}
1284
1285struct ide_host *ide_host_alloc(const struct ide_port_info *d,
1286 struct ide_hw **hws, unsigned int n_ports)
1287{
1288 struct ide_host *host;
1289 struct device *dev = hws[0] ? hws[0]->dev : NULL;
1290 int node = dev ? dev_to_node(dev) : -1;
1291 int i;
1292
1293 host = kzalloc_node(sizeof(*host), GFP_KERNEL, node);
1294 if (host == NULL)
1295 return NULL;
1296
1297 for (i = 0; i < n_ports; i++) {
1298 ide_hwif_t *hwif;
1299 int idx;
1300
1301 if (hws[i] == NULL)
1302 continue;
1303
1304 hwif = kzalloc_node(sizeof(*hwif), GFP_KERNEL, node);
1305 if (hwif == NULL)
1306 continue;
1307
1308 if (ide_port_alloc_devices(hwif, node) < 0) {
1309 kfree(hwif);
1310 continue;
1311 }
1312
1313 idx = ide_find_port_slot(d);
1314 if (idx < 0) {
1315 printk(KERN_ERR "%s: no free slot for interface\n",
1316 d ? d->name : "ide");
1317 ide_port_free_devices(hwif);
1318 kfree(hwif);
1319 continue;
1320 }
1321
1322 ide_init_port_data(hwif, idx);
1323
1324 hwif->host = host;
1325
1326 host->ports[i] = hwif;
1327 host->n_ports++;
1328 }
1329
1330 if (host->n_ports == 0) {
1331 kfree(host);
1332 return NULL;
1333 }
1334
1335 host->dev[0] = dev;
1336
1337 if (d) {
1338 host->init_chipset = d->init_chipset;
1339 host->get_lock = d->get_lock;
1340 host->release_lock = d->release_lock;
1341 host->host_flags = d->host_flags;
1342 host->irq_flags = d->irq_flags;
1343 }
1344
1345 return host;
1346}
1347EXPORT_SYMBOL_GPL(ide_host_alloc);
1348
1349static void ide_port_free(ide_hwif_t *hwif)
1350{
1351 ide_port_free_devices(hwif);
1352 ide_free_port_slot(hwif->index);
1353 kfree(hwif);
1354}
1355
1356static void ide_disable_port(ide_hwif_t *hwif)
1357{
1358 struct ide_host *host = hwif->host;
1359 int i;
1360
1361 printk(KERN_INFO "%s: disabling port\n", hwif->name);
1362
1363 for (i = 0; i < MAX_HOST_PORTS; i++) {
1364 if (host->ports[i] == hwif) {
1365 host->ports[i] = NULL;
1366 host->n_ports--;
1367 }
1368 }
1369
1370 ide_port_free(hwif);
1371}
1372
1373int ide_host_register(struct ide_host *host, const struct ide_port_info *d,
1374 struct ide_hw **hws)
1375{
1376 ide_hwif_t *hwif, *mate = NULL;
1377 int i, j = 0;
1378
1379 ide_host_for_each_port(i, hwif, host) {
1380 if (hwif == NULL) {
1381 mate = NULL;
1382 continue;
1383 }
1384
1385 ide_init_port_hw(hwif, hws[i]);
1386 ide_port_apply_params(hwif);
1387
1388 if ((i & 1) && mate) {
1389 hwif->mate = mate;
1390 mate->mate = hwif;
1391 }
1392
1393 mate = (i & 1) ? NULL : hwif;
1394
1395 ide_init_port(hwif, i & 1, d);
1396 ide_port_cable_detect(hwif);
1397
1398 hwif->port_flags |= IDE_PFLAG_PROBING;
1399
1400 ide_port_init_devices(hwif);
1401 }
1402
1403 ide_host_for_each_port(i, hwif, host) {
1404 if (hwif == NULL)
1405 continue;
1406
1407 if (ide_probe_port(hwif) == 0)
1408 hwif->present = 1;
1409
1410 hwif->port_flags &= ~IDE_PFLAG_PROBING;
1411
1412 if ((hwif->host_flags & IDE_HFLAG_4DRIVES) == 0 ||
1413 hwif->mate == NULL || hwif->mate->present == 0) {
1414 if (ide_register_port(hwif)) {
1415 ide_disable_port(hwif);
1416 continue;
1417 }
1418 }
1419
1420 if (hwif->present)
1421 ide_port_tune_devices(hwif);
1422 }
1423
1424 ide_host_enable_irqs(host);
1425
1426 ide_host_for_each_port(i, hwif, host) {
1427 if (hwif == NULL)
1428 continue;
1429
1430 if (hwif_init(hwif) == 0) {
1431 printk(KERN_INFO "%s: failed to initialize IDE "
1432 "interface\n", hwif->name);
1433 device_unregister(&hwif->gendev);
1434 ide_disable_port(hwif);
1435 continue;
1436 }
1437
1438 if (hwif->present)
1439 if (ide_port_setup_devices(hwif) == 0) {
1440 hwif->present = 0;
1441 continue;
1442 }
1443
1444 j++;
1445
1446 ide_acpi_init_port(hwif);
1447
1448 if (hwif->present)
1449 ide_acpi_port_init_devices(hwif);
1450 }
1451
1452 ide_host_for_each_port(i, hwif, host) {
1453 if (hwif == NULL)
1454 continue;
1455
1456 if (hwif->present)
1457 hwif_register_devices(hwif);
1458 }
1459
1460 ide_host_for_each_port(i, hwif, host) {
1461 if (hwif == NULL)
1462 continue;
1463
1464 ide_sysfs_register_port(hwif);
1465 ide_proc_register_port(hwif);
1466
1467 if (hwif->present)
1468 ide_proc_port_register_devices(hwif);
1469 }
1470
1471 return j ? 0 : -1;
1472}
1473EXPORT_SYMBOL_GPL(ide_host_register);
1474
1475int ide_host_add(const struct ide_port_info *d, struct ide_hw **hws,
1476 unsigned int n_ports, struct ide_host **hostp)
1477{
1478 struct ide_host *host;
1479 int rc;
1480
1481 host = ide_host_alloc(d, hws, n_ports);
1482 if (host == NULL)
1483 return -ENOMEM;
1484
1485 rc = ide_host_register(host, d, hws);
1486 if (rc) {
1487 ide_host_free(host);
1488 return rc;
1489 }
1490
1491 if (hostp)
1492 *hostp = host;
1493
1494 return 0;
1495}
1496EXPORT_SYMBOL_GPL(ide_host_add);
1497
1498static void __ide_port_unregister_devices(ide_hwif_t *hwif)
1499{
1500 ide_drive_t *drive;
1501 int i;
1502
1503 ide_port_for_each_present_dev(i, drive, hwif) {
1504 device_unregister(&drive->gendev);
1505 wait_for_completion(&drive->gendev_rel_comp);
1506 }
1507}
1508
1509void ide_port_unregister_devices(ide_hwif_t *hwif)
1510{
1511 mutex_lock(&ide_cfg_mtx);
1512 __ide_port_unregister_devices(hwif);
1513 hwif->present = 0;
1514 ide_port_init_devices_data(hwif);
1515 mutex_unlock(&ide_cfg_mtx);
1516}
1517EXPORT_SYMBOL_GPL(ide_port_unregister_devices);
1518
1519
1520
1521
1522
1523
1524
1525
1526
1527
1528
1529
1530
1531
1532
1533static void ide_unregister(ide_hwif_t *hwif)
1534{
1535 BUG_ON(in_interrupt());
1536 BUG_ON(irqs_disabled());
1537
1538 mutex_lock(&ide_cfg_mtx);
1539
1540 if (hwif->present) {
1541 __ide_port_unregister_devices(hwif);
1542 hwif->present = 0;
1543 }
1544
1545 ide_proc_unregister_port(hwif);
1546
1547 free_irq(hwif->irq, hwif);
1548
1549 device_unregister(hwif->portdev);
1550 device_unregister(&hwif->gendev);
1551 wait_for_completion(&hwif->gendev_rel_comp);
1552
1553
1554
1555
1556 blk_unregister_region(MKDEV(hwif->major, 0), MAX_DRIVES<<PARTN_BITS);
1557 kfree(hwif->sg_table);
1558 unregister_blkdev(hwif->major, hwif->name);
1559
1560 ide_release_dma_engine(hwif);
1561
1562 mutex_unlock(&ide_cfg_mtx);
1563}
1564
1565void ide_host_free(struct ide_host *host)
1566{
1567 ide_hwif_t *hwif;
1568 int i;
1569
1570 ide_host_for_each_port(i, hwif, host) {
1571 if (hwif)
1572 ide_port_free(hwif);
1573 }
1574
1575 kfree(host);
1576}
1577EXPORT_SYMBOL_GPL(ide_host_free);
1578
1579void ide_host_remove(struct ide_host *host)
1580{
1581 ide_hwif_t *hwif;
1582 int i;
1583
1584 ide_host_for_each_port(i, hwif, host) {
1585 if (hwif)
1586 ide_unregister(hwif);
1587 }
1588
1589 ide_host_free(host);
1590}
1591EXPORT_SYMBOL_GPL(ide_host_remove);
1592
1593void ide_port_scan(ide_hwif_t *hwif)
1594{
1595 int rc;
1596
1597 ide_port_apply_params(hwif);
1598 ide_port_cable_detect(hwif);
1599
1600 hwif->port_flags |= IDE_PFLAG_PROBING;
1601
1602 ide_port_init_devices(hwif);
1603
1604 rc = ide_probe_port(hwif);
1605
1606 hwif->port_flags &= ~IDE_PFLAG_PROBING;
1607
1608 if (rc < 0)
1609 return;
1610
1611 hwif->present = 1;
1612
1613 ide_port_tune_devices(hwif);
1614 ide_port_setup_devices(hwif);
1615 ide_acpi_port_init_devices(hwif);
1616 hwif_register_devices(hwif);
1617 ide_proc_port_register_devices(hwif);
1618}
1619EXPORT_SYMBOL_GPL(ide_port_scan);
1620