2 * Copyright (C) 1994-1998 Linus Torvalds & authors (see below)
3 * Copyright (C) 2005, 2007 Bartlomiej Zolnierkiewicz
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>
11 * See linux/MAINTAINERS for address of current maintainer.
13 * This is the IDE probe module, as evolved from hd.c and ide.c.
15 * -- increase WAIT_PIDENTIFY to avoid CD-ROM locking at boot
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>
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>
37 #include <asm/byteorder.h>
39 #include <asm/uaccess.h>
43 * generic_id - add a generic drive id
44 * @drive: drive to make an ID block for
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
51 static void generic_id(ide_drive_t
*drive
)
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
;
60 static void ide_disk_init_chs(ide_drive_t
*drive
)
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
];
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
];
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
];
86 static void ide_disk_init_mult_count(ide_drive_t
*drive
)
89 u8 max_multsect
= id
[ATA_ID_MAX_MULTSECT
] & 0xff;
92 if ((max_multsect
/ 2) > 1)
93 id
[ATA_ID_MULTSECT
] = max_multsect
| 0x100;
95 id
[ATA_ID_MULTSECT
] &= ~0x1ff;
97 drive
->mult_req
= id
[ATA_ID_MULTSECT
] & 0xff;
100 drive
->special
.b
.set_multmode
= 1;
105 * do_identify - identify a drive
106 * @drive: drive to identify
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.
114 static void do_identify(ide_drive_t
*drive
, u8 cmd
)
116 ide_hwif_t
*hwif
= HWIF(drive
);
118 char *m
= (char *)&id
[ATA_ID_PROD
];
120 int bswap
= 1, is_cfa
;
122 /* local CPU only; some systems need this */
123 local_irq_save(flags
);
124 /* read 512 bytes of id info */
125 hwif
->tp_ops
->input_data(drive
, NULL
, id
, SECTOR_SIZE
);
126 local_irq_restore(flags
);
128 drive
->dev_flags
|= IDE_DFLAG_ID_READ
;
130 printk(KERN_INFO
"%s: dumping identify data\n", drive
->name
);
131 ide_dump_identify((u8
*)id
);
136 * ATA_CMD_ID_ATA returns little-endian info,
137 * ATA_CMD_ID_ATAPI *usually* returns little-endian info.
139 if (cmd
== ATA_CMD_ID_ATAPI
) {
140 if ((m
[0] == 'N' && m
[1] == 'E') || /* NEC */
141 (m
[0] == 'F' && m
[1] == 'X') || /* Mitsumi */
142 (m
[0] == 'P' && m
[1] == 'i')) /* Pioneer */
143 /* Vertos drives may still be weird */
147 ide_fixstring(m
, ATA_ID_PROD_LEN
, bswap
);
148 ide_fixstring((char *)&id
[ATA_ID_FW_REV
], ATA_ID_FW_REV_LEN
, bswap
);
149 ide_fixstring((char *)&id
[ATA_ID_SERNO
], ATA_ID_SERNO_LEN
, bswap
);
151 /* we depend on this a lot! */
152 m
[ATA_ID_PROD_LEN
- 1] = '\0';
154 if (strstr(m
, "E X A B Y T E N E S T"))
157 printk(KERN_INFO
"%s: %s, ", drive
->name
, m
);
159 drive
->dev_flags
|= IDE_DFLAG_PRESENT
;
160 drive
->dev_flags
&= ~IDE_DFLAG_DEAD
;
163 * Check for an ATAPI device
165 if (cmd
== ATA_CMD_ID_ATAPI
) {
166 u8 type
= (id
[ATA_ID_CONFIG
] >> 8) & 0x1f;
168 printk(KERN_CONT
"ATAPI ");
171 if (!strstr(m
, "CD-ROM")) {
172 if (!strstr(m
, "oppy") &&
173 !strstr(m
, "poyp") &&
175 printk(KERN_CONT
"cdrom or floppy?, assuming ");
176 if (drive
->media
!= ide_cdrom
) {
177 printk(KERN_CONT
"FLOPPY");
178 drive
->dev_flags
|= IDE_DFLAG_REMOVABLE
;
182 /* Early cdrom models used zero */
185 drive
->dev_flags
|= IDE_DFLAG_REMOVABLE
;
187 /* kludge for Apple PowerBook internal zip */
188 if (!strstr(m
, "CD-ROM") && strstr(m
, "ZIP")) {
189 printk(KERN_CONT
"FLOPPY");
194 printk(KERN_CONT
"CD/DVD-ROM");
197 printk(KERN_CONT
"TAPE");
200 printk(KERN_CONT
"OPTICAL");
201 drive
->dev_flags
|= IDE_DFLAG_REMOVABLE
;
204 printk(KERN_CONT
"UNKNOWN (type %d)", type
);
207 printk(KERN_CONT
" drive\n");
209 /* an ATAPI device ignores DRDY */
210 drive
->ready_stat
= 0;
211 if (ata_id_cdb_intr(id
))
212 drive
->atapi_flags
|= IDE_AFLAG_DRQ_INTERRUPT
;
213 drive
->dev_flags
|= IDE_DFLAG_DOORLOCKING
;
214 /* we don't do head unloading on ATAPI devices */
215 drive
->dev_flags
|= IDE_DFLAG_NO_UNLOAD
;
220 * Not an ATAPI device: looks like a "regular" hard disk
223 is_cfa
= ata_id_is_cfa(id
);
225 /* CF devices are *not* removable in Linux definition of the term */
226 if (is_cfa
== 0 && (id
[ATA_ID_CONFIG
] & (1 << 7)))
227 drive
->dev_flags
|= IDE_DFLAG_REMOVABLE
;
229 drive
->media
= ide_disk
;
231 if (!ata_id_has_unload(drive
->id
))
232 drive
->dev_flags
|= IDE_DFLAG_NO_UNLOAD
;
234 printk(KERN_CONT
"%s DISK drive\n", is_cfa
? "CFA" : "ATA");
240 drive
->dev_flags
&= ~IDE_DFLAG_PRESENT
;
245 * actual_try_to_identify - send ata/atapi identify
246 * @drive: drive to identify
247 * @cmd: command to use
249 * try_to_identify() sends an ATA(PI) IDENTIFY request to a drive
250 * and waits for a response. It also monitors irqs while this is
251 * happening, in hope of automatically determining which one is
252 * being used by the interface.
254 * Returns: 0 device was identified
255 * 1 device timed-out (no response to identify request)
256 * 2 device aborted the command (refused to identify itself)
259 static int actual_try_to_identify (ide_drive_t
*drive
, u8 cmd
)
261 ide_hwif_t
*hwif
= HWIF(drive
);
262 struct ide_io_ports
*io_ports
= &hwif
->io_ports
;
263 const struct ide_tp_ops
*tp_ops
= hwif
->tp_ops
;
264 int use_altstatus
= 0, rc
;
265 unsigned long timeout
;
268 /* take a deep breath */
271 if (io_ports
->ctl_addr
&&
272 (hwif
->host_flags
& IDE_HFLAG_BROKEN_ALTSTATUS
) == 0) {
273 a
= tp_ops
->read_altstatus(hwif
);
274 s
= tp_ops
->read_status(hwif
);
275 if ((a
^ s
) & ~ATA_IDX
)
276 /* ancient Seagate drives, broken interfaces */
277 printk(KERN_INFO
"%s: probing with STATUS(0x%02x) "
278 "instead of ALTSTATUS(0x%02x)\n",
281 /* use non-intrusive polling */
285 /* set features register for atapi
286 * identify command to be sure of reply
288 if (cmd
== ATA_CMD_ID_ATAPI
) {
291 memset(&task
, 0, sizeof(task
));
292 /* disable DMA & overlap */
293 task
.tf_flags
= IDE_TFLAG_OUT_FEATURE
;
295 tp_ops
->tf_load(drive
, &task
);
298 /* ask drive for ID */
299 tp_ops
->exec_command(hwif
, cmd
);
301 timeout
= ((cmd
== ATA_CMD_ID_ATA
) ? WAIT_WORSTCASE
: WAIT_PIDENTIFY
) / 2;
303 if (ide_busy_sleep(hwif
, timeout
, use_altstatus
))
306 /* wait for IRQ and ATA_DRQ */
308 s
= tp_ops
->read_status(hwif
);
310 if (OK_STAT(s
, ATA_DRQ
, BAD_R_STAT
)) {
311 /* drive returned ID */
312 do_identify(drive
, cmd
);
313 /* drive responded with ID */
315 /* clear drive IRQ */
316 (void)tp_ops
->read_status(hwif
);
318 /* drive refused ID */
325 * try_to_identify - try to identify a drive
326 * @drive: drive to probe
327 * @cmd: command to use
329 * Issue the identify command and then do IRQ probing to
330 * complete the identification when needed by finding the
331 * IRQ the drive is attached to
334 static int try_to_identify (ide_drive_t
*drive
, u8 cmd
)
336 ide_hwif_t
*hwif
= HWIF(drive
);
337 const struct ide_tp_ops
*tp_ops
= hwif
->tp_ops
;
340 unsigned long cookie
= 0;
343 * Disable device irq unless we need to
344 * probe for it. Otherwise we'll get spurious
345 * interrupts during the identify-phase that
346 * the irq handler isn't expecting.
348 if (hwif
->io_ports
.ctl_addr
) {
351 cookie
= probe_irq_on();
353 tp_ops
->set_irq(hwif
, autoprobe
);
356 retval
= actual_try_to_identify(drive
, cmd
);
361 tp_ops
->set_irq(hwif
, 0);
362 /* clear drive IRQ */
363 (void)tp_ops
->read_status(hwif
);
365 irq
= probe_irq_off(cookie
);
370 /* Mmmm.. multiple IRQs..
371 * don't know which was ours
373 printk(KERN_ERR
"%s: IRQ probe failed (0x%lx)\n",
374 drive
->name
, cookie
);
381 int ide_busy_sleep(ide_hwif_t
*hwif
, unsigned long timeout
, int altstatus
)
388 msleep(50); /* give drive a breather */
389 stat
= altstatus
? hwif
->tp_ops
->read_altstatus(hwif
)
390 : hwif
->tp_ops
->read_status(hwif
);
391 if ((stat
& ATA_BUSY
) == 0)
393 } while (time_before(jiffies
, timeout
));
395 return 1; /* drive timed-out */
398 static u8
ide_read_device(ide_drive_t
*drive
)
402 memset(&task
, 0, sizeof(task
));
403 task
.tf_flags
= IDE_TFLAG_IN_DEVICE
;
405 drive
->hwif
->tp_ops
->tf_read(drive
, &task
);
407 return task
.tf
.device
;
411 * do_probe - probe an IDE device
412 * @drive: drive to probe
413 * @cmd: command to use
415 * do_probe() has the difficult job of finding a drive if it exists,
416 * without getting hung up if it doesn't exist, without trampling on
417 * ethernet cards, and without leaving any IRQs dangling to haunt us later.
419 * If a drive is "known" to exist (from CMOS or kernel parameters),
420 * but does not respond right away, the probe will "hang in there"
421 * for the maximum wait time (about 30 seconds), otherwise it will
422 * exit much more quickly.
424 * Returns: 0 device was identified
425 * 1 device timed-out (no response to identify request)
426 * 2 device aborted the command (refused to identify itself)
427 * 3 bad status from device (possible for ATAPI drives)
428 * 4 probe was not attempted because failure was obvious
431 static int do_probe (ide_drive_t
*drive
, u8 cmd
)
433 ide_hwif_t
*hwif
= HWIF(drive
);
434 const struct ide_tp_ops
*tp_ops
= hwif
->tp_ops
;
436 u8 present
= !!(drive
->dev_flags
& IDE_DFLAG_PRESENT
), stat
;
438 /* avoid waiting for inappropriate probes */
439 if (present
&& drive
->media
!= ide_disk
&& cmd
== ATA_CMD_ID_ATA
)
443 printk(KERN_INFO
"probing for %s: present=%d, media=%d, probetype=%s\n",
444 drive
->name
, present
, drive
->media
,
445 (cmd
== ATA_CMD_ID_ATA
) ? "ATA" : "ATAPI");
448 /* needed for some systems
449 * (e.g. crw9624 as drive0 with disk as slave)
455 if (ide_read_device(drive
) != drive
->select
&& present
== 0) {
457 /* exit with drive0 selected */
458 SELECT_DRIVE(&hwif
->drives
[0]);
459 /* allow ATA_BUSY to assert & clear */
462 /* no i/f present: mmm.. this should be a 4 -ml */
466 stat
= tp_ops
->read_status(hwif
);
468 if (OK_STAT(stat
, ATA_DRDY
, ATA_BUSY
) ||
469 present
|| cmd
== ATA_CMD_ID_ATAPI
) {
470 /* send cmd and wait */
471 if ((rc
= try_to_identify(drive
, cmd
))) {
472 /* failed: try again */
473 rc
= try_to_identify(drive
,cmd
);
476 stat
= tp_ops
->read_status(hwif
);
478 if (stat
== (ATA_BUSY
| ATA_DRDY
))
481 if (rc
== 1 && cmd
== ATA_CMD_ID_ATAPI
) {
482 printk(KERN_ERR
"%s: no response (status = 0x%02x), "
483 "resetting drive\n", drive
->name
, stat
);
487 tp_ops
->exec_command(hwif
, ATA_CMD_DEV_RESET
);
488 (void)ide_busy_sleep(hwif
, WAIT_WORSTCASE
, 0);
489 rc
= try_to_identify(drive
, cmd
);
492 /* ensure drive IRQ is clear */
493 stat
= tp_ops
->read_status(hwif
);
496 printk(KERN_ERR
"%s: no response (status = 0x%02x)\n",
499 /* not present or maybe ATAPI */
503 /* exit with drive0 selected */
504 SELECT_DRIVE(&hwif
->drives
[0]);
506 /* ensure drive irq is clear */
507 (void)tp_ops
->read_status(hwif
);
515 static void enable_nest (ide_drive_t
*drive
)
517 ide_hwif_t
*hwif
= HWIF(drive
);
518 const struct ide_tp_ops
*tp_ops
= hwif
->tp_ops
;
521 printk(KERN_INFO
"%s: enabling %s -- ",
522 hwif
->name
, (char *)&drive
->id
[ATA_ID_PROD
]);
526 tp_ops
->exec_command(hwif
, ATA_EXABYTE_ENABLE_NEST
);
528 if (ide_busy_sleep(hwif
, WAIT_WORSTCASE
, 0)) {
529 printk(KERN_CONT
"failed (timeout)\n");
535 stat
= tp_ops
->read_status(hwif
);
537 if (!OK_STAT(stat
, 0, BAD_STAT
))
538 printk(KERN_CONT
"failed (status = 0x%02x)\n", stat
);
540 printk(KERN_CONT
"success\n");
544 * probe_for_drives - upper level drive probe
545 * @drive: drive to probe for
547 * probe_for_drive() tests for existence of a given drive using do_probe()
548 * and presents things to the user as needed.
550 * Returns: 0 no device was found
552 * (note: IDE_DFLAG_PRESENT might still be not set)
555 static u8
probe_for_drive(ide_drive_t
*drive
)
560 * In order to keep things simple we have an id
561 * block for all drives at all times. If the device
562 * is pre ATA or refuses ATA/ATAPI identify we
563 * will add faked data to this.
565 * Also note that 0 everywhere means "can't do X"
568 drive
->dev_flags
&= ~IDE_DFLAG_ID_READ
;
570 drive
->id
= kzalloc(SECTOR_SIZE
, GFP_KERNEL
);
571 if (drive
->id
== NULL
) {
572 printk(KERN_ERR
"ide: out of memory for id data.\n");
576 m
= (char *)&drive
->id
[ATA_ID_PROD
];
577 strcpy(m
, "UNKNOWN");
580 if ((drive
->dev_flags
& IDE_DFLAG_NOPROBE
) == 0) {
582 /* if !(success||timed-out) */
583 if (do_probe(drive
, ATA_CMD_ID_ATA
) >= 2)
584 /* look for ATAPI device */
585 (void)do_probe(drive
, ATA_CMD_ID_ATAPI
);
587 if ((drive
->dev_flags
& IDE_DFLAG_PRESENT
) == 0)
588 /* drive not found */
591 if (strstr(m
, "E X A B Y T E N E S T")) {
596 /* identification failed? */
597 if ((drive
->dev_flags
& IDE_DFLAG_ID_READ
) == 0) {
598 if (drive
->media
== ide_disk
) {
599 printk(KERN_INFO
"%s: non-IDE drive, CHS=%d/%d/%d\n",
600 drive
->name
, drive
->cyl
,
601 drive
->head
, drive
->sect
);
602 } else if (drive
->media
== ide_cdrom
) {
603 printk(KERN_INFO
"%s: ATAPI cdrom (?)\n", drive
->name
);
606 printk(KERN_WARNING
"%s: Unknown device on bus refused identification. Ignoring.\n", drive
->name
);
607 drive
->dev_flags
&= ~IDE_DFLAG_PRESENT
;
610 /* drive was found */
613 if ((drive
->dev_flags
& IDE_DFLAG_PRESENT
) == 0)
616 /* The drive wasn't being helpful. Add generic info only */
617 if ((drive
->dev_flags
& IDE_DFLAG_ID_READ
) == 0) {
622 if (drive
->media
== ide_disk
) {
623 ide_disk_init_chs(drive
);
624 ide_disk_init_mult_count(drive
);
627 return !!(drive
->dev_flags
& IDE_DFLAG_PRESENT
);
630 static void hwif_release_dev(struct device
*dev
)
632 ide_hwif_t
*hwif
= container_of(dev
, ide_hwif_t
, gendev
);
634 complete(&hwif
->gendev_rel_comp
);
637 static int ide_register_port(ide_hwif_t
*hwif
)
641 /* register with global device tree */
642 dev_set_name(&hwif
->gendev
, hwif
->name
);
643 hwif
->gendev
.driver_data
= hwif
;
644 if (hwif
->gendev
.parent
== NULL
) {
646 hwif
->gendev
.parent
= hwif
->dev
;
648 /* Would like to do = &device_legacy */
649 hwif
->gendev
.parent
= NULL
;
651 hwif
->gendev
.release
= hwif_release_dev
;
652 ret
= device_register(&hwif
->gendev
);
654 printk(KERN_WARNING
"IDE: %s: device_register error: %d\n",
659 hwif
->portdev
= device_create(ide_port_class
, &hwif
->gendev
,
660 MKDEV(0, 0), hwif
, hwif
->name
);
661 if (IS_ERR(hwif
->portdev
)) {
662 ret
= PTR_ERR(hwif
->portdev
);
663 device_unregister(&hwif
->gendev
);
670 * ide_port_wait_ready - wait for port to become ready
673 * This is needed on some PPCs and a bunch of BIOS-less embedded
674 * platforms. Typical cases are:
676 * - The firmware hard reset the disk before booting the kernel,
677 * the drive is still doing it's poweron-reset sequence, that
678 * can take up to 30 seconds.
680 * - The firmware does nothing (or no firmware), the device is
681 * still in POST state (same as above actually).
683 * - Some CD/DVD/Writer combo drives tend to drive the bus during
684 * their reset sequence even when they are non-selected slave
685 * devices, thus preventing discovery of the main HD.
687 * Doing this wait-for-non-busy should not harm any existing
688 * configuration and fix some issues like the above.
692 * Returns 0 on success, error code (< 0) otherwise.
695 static int ide_port_wait_ready(ide_hwif_t
*hwif
)
699 printk(KERN_DEBUG
"Probing IDE interface %s...\n", hwif
->name
);
701 /* Let HW settle down a bit from whatever init state we
705 /* Wait for BSY bit to go away, spec timeout is 30 seconds,
706 * I know of at least one disk who takes 31 seconds, I use 35
709 rc
= ide_wait_not_busy(hwif
, 35000);
713 /* Now make sure both master & slave are ready */
714 for (unit
= 0; unit
< MAX_DRIVES
; unit
++) {
715 ide_drive_t
*drive
= &hwif
->drives
[unit
];
717 /* Ignore disks that we will not probe for later. */
718 if ((drive
->dev_flags
& IDE_DFLAG_NOPROBE
) == 0 ||
719 (drive
->dev_flags
& IDE_DFLAG_PRESENT
)) {
721 hwif
->tp_ops
->set_irq(hwif
, 1);
723 rc
= ide_wait_not_busy(hwif
, 35000);
727 printk(KERN_DEBUG
"%s: ide_wait_not_busy() skipped\n",
731 /* Exit function with master reselected (let's be sane) */
733 SELECT_DRIVE(&hwif
->drives
[0]);
739 * ide_undecoded_slave - look for bad CF adapters
740 * @dev1: slave device
742 * Analyse the drives on the interface and attempt to decide if we
743 * have the same drive viewed twice. This occurs with crap CF adapters
744 * and PCMCIA sometimes.
747 void ide_undecoded_slave(ide_drive_t
*dev1
)
749 ide_drive_t
*dev0
= &dev1
->hwif
->drives
[0];
751 if ((dev1
->dn
& 1) == 0 || (dev0
->dev_flags
& IDE_DFLAG_PRESENT
) == 0)
754 /* If the models don't match they are not the same product */
755 if (strcmp((char *)&dev0
->id
[ATA_ID_PROD
],
756 (char *)&dev1
->id
[ATA_ID_PROD
]))
759 /* Serial numbers do not match */
760 if (strncmp((char *)&dev0
->id
[ATA_ID_SERNO
],
761 (char *)&dev1
->id
[ATA_ID_SERNO
], ATA_ID_SERNO_LEN
))
764 /* No serial number, thankfully very rare for CF */
765 if (*(char *)&dev0
->id
[ATA_ID_SERNO
] == 0)
768 /* Appears to be an IDE flash adapter with decode bugs */
769 printk(KERN_WARNING
"ide-probe: ignoring undecoded slave\n");
771 dev1
->dev_flags
&= ~IDE_DFLAG_PRESENT
;
774 EXPORT_SYMBOL_GPL(ide_undecoded_slave
);
776 static int ide_probe_port(ide_hwif_t
*hwif
)
780 int unit
, rc
= -ENODEV
;
782 BUG_ON(hwif
->present
);
784 if ((hwif
->drives
[0].dev_flags
& IDE_DFLAG_NOPROBE
) &&
785 (hwif
->drives
[1].dev_flags
& IDE_DFLAG_NOPROBE
))
789 * We must always disable IRQ, as probe_for_drive will assert IRQ, but
790 * we'll install our IRQ driver much later...
794 disable_irq(hwif
->irq
);
796 local_irq_set(flags
);
798 if (ide_port_wait_ready(hwif
) == -EBUSY
)
799 printk(KERN_DEBUG
"%s: Wait for ready failed before probe !\n", hwif
->name
);
802 * Second drive should only exist if first drive was found,
803 * but a lot of cdrom drives are configured as single slaves.
805 for (unit
= 0; unit
< MAX_DRIVES
; ++unit
) {
806 ide_drive_t
*drive
= &hwif
->drives
[unit
];
808 (void) probe_for_drive(drive
);
809 if (drive
->dev_flags
& IDE_DFLAG_PRESENT
)
813 local_irq_restore(flags
);
816 * Use cached IRQ number. It might be (and is...) changed by probe
825 static void ide_port_tune_devices(ide_hwif_t
*hwif
)
827 const struct ide_port_ops
*port_ops
= hwif
->port_ops
;
830 for (unit
= 0; unit
< MAX_DRIVES
; unit
++) {
831 ide_drive_t
*drive
= &hwif
->drives
[unit
];
833 if (drive
->dev_flags
& IDE_DFLAG_PRESENT
) {
834 if (port_ops
&& port_ops
->quirkproc
)
835 port_ops
->quirkproc(drive
);
839 for (unit
= 0; unit
< MAX_DRIVES
; ++unit
) {
840 ide_drive_t
*drive
= &hwif
->drives
[unit
];
842 if (drive
->dev_flags
& IDE_DFLAG_PRESENT
) {
843 ide_set_max_pio(drive
);
845 drive
->dev_flags
|= IDE_DFLAG_NICE1
;
852 for (unit
= 0; unit
< MAX_DRIVES
; ++unit
) {
853 ide_drive_t
*drive
= &hwif
->drives
[unit
];
855 if ((hwif
->host_flags
& IDE_HFLAG_NO_IO_32BIT
) ||
856 drive
->id
[ATA_ID_DWORD_IO
])
857 drive
->dev_flags
|= IDE_DFLAG_NO_IO_32BIT
;
859 drive
->dev_flags
&= ~IDE_DFLAG_NO_IO_32BIT
;
866 static int ide_init_queue(ide_drive_t
*drive
)
868 struct request_queue
*q
;
869 ide_hwif_t
*hwif
= HWIF(drive
);
870 int max_sectors
= 256;
871 int max_sg_entries
= PRD_ENTRIES
;
874 * Our default set up assumes the normal IDE case,
875 * that is 64K segmenting, standard PRD setup
876 * and LBA28. Some drivers then impose their own
877 * limits and LBA48 we could raise it but as yet
881 q
= blk_init_queue_node(do_ide_request
, &hwif
->hwgroup
->lock
,
886 q
->queuedata
= drive
;
887 blk_queue_segment_boundary(q
, 0xffff);
889 if (hwif
->rqsize
< max_sectors
)
890 max_sectors
= hwif
->rqsize
;
891 blk_queue_max_sectors(q
, max_sectors
);
894 /* When we have an IOMMU, we may have a problem where pci_map_sg()
895 * creates segments that don't completely match our boundary
896 * requirements and thus need to be broken up again. Because it
897 * doesn't align properly either, we may actually have to break up
898 * to more segments than what was we got in the first place, a max
899 * worst case is twice as many.
900 * This will be fixed once we teach pci_map_sg() about our boundary
901 * requirements, hopefully soon. *FIXME*
903 if (!PCI_DMA_BUS_IS_PHYS
)
904 max_sg_entries
>>= 1;
905 #endif /* CONFIG_PCI */
907 blk_queue_max_hw_segments(q
, max_sg_entries
);
908 blk_queue_max_phys_segments(q
, max_sg_entries
);
910 /* assign drive queue */
913 /* needs drive->queue to be set */
914 ide_toggle_bounce(drive
, 1);
919 static void ide_add_drive_to_hwgroup(ide_drive_t
*drive
)
921 ide_hwgroup_t
*hwgroup
= drive
->hwif
->hwgroup
;
923 spin_lock_irq(&hwgroup
->lock
);
924 if (!hwgroup
->drive
) {
925 /* first drive for hwgroup. */
927 hwgroup
->drive
= drive
;
928 hwgroup
->hwif
= HWIF(hwgroup
->drive
);
930 drive
->next
= hwgroup
->drive
->next
;
931 hwgroup
->drive
->next
= drive
;
933 spin_unlock_irq(&hwgroup
->lock
);
937 * For any present drive:
938 * - allocate the block device queue
939 * - link drive into the hwgroup
941 static int ide_port_setup_devices(ide_hwif_t
*hwif
)
945 mutex_lock(&ide_cfg_mtx
);
946 for (i
= 0; i
< MAX_DRIVES
; i
++) {
947 ide_drive_t
*drive
= &hwif
->drives
[i
];
949 if ((drive
->dev_flags
& IDE_DFLAG_PRESENT
) == 0)
952 if (ide_init_queue(drive
)) {
953 printk(KERN_ERR
"ide: failed to init %s\n",
957 drive
->dev_flags
&= ~IDE_DFLAG_PRESENT
;
963 ide_add_drive_to_hwgroup(drive
);
965 mutex_unlock(&ide_cfg_mtx
);
970 static ide_hwif_t
*ide_ports
[MAX_HWIFS
];
972 void ide_remove_port_from_hwgroup(ide_hwif_t
*hwif
)
974 ide_hwgroup_t
*hwgroup
= hwif
->hwgroup
;
976 ide_ports
[hwif
->index
] = NULL
;
978 spin_lock_irq(&hwgroup
->lock
);
980 * Remove us from the hwgroup, and free
981 * the hwgroup if we were the only member
983 if (hwif
->next
== hwif
) {
984 BUG_ON(hwgroup
->hwif
!= hwif
);
987 /* There is another interface in hwgroup.
988 * Unlink us, and set hwgroup->drive and ->hwif to
991 ide_hwif_t
*g
= hwgroup
->hwif
;
993 while (g
->next
!= hwif
)
995 g
->next
= hwif
->next
;
996 if (hwgroup
->hwif
== hwif
) {
997 /* Chose a random hwif for hwgroup->hwif.
998 * It's guaranteed that there are no drives
999 * left in the hwgroup.
1001 BUG_ON(hwgroup
->drive
!= NULL
);
1004 BUG_ON(hwgroup
->hwif
== hwif
);
1006 spin_unlock_irq(&hwgroup
->lock
);
1010 * This routine sets up the irq for an ide interface, and creates a new
1011 * hwgroup for the irq/hwif if none was previously assigned.
1013 * Much of the code is for correctly detecting/handling irq sharing
1014 * and irq serialization situations. This is somewhat complex because
1015 * it handles static as well as dynamic (PCMCIA) IDE interfaces.
1017 static int init_irq (ide_hwif_t
*hwif
)
1019 struct ide_io_ports
*io_ports
= &hwif
->io_ports
;
1021 ide_hwgroup_t
*hwgroup
;
1022 ide_hwif_t
*match
= NULL
;
1024 mutex_lock(&ide_cfg_mtx
);
1025 hwif
->hwgroup
= NULL
;
1027 for (index
= 0; index
< MAX_HWIFS
; index
++) {
1028 ide_hwif_t
*h
= ide_ports
[index
];
1030 if (h
&& h
->hwgroup
) { /* scan only initialized ports */
1031 if (hwif
->host
->host_flags
& IDE_HFLAG_SERIALIZE
) {
1032 if (hwif
->host
== h
->host
)
1039 * If we are still without a hwgroup, then form a new one
1042 hwgroup
= match
->hwgroup
;
1043 hwif
->hwgroup
= hwgroup
;
1045 * Link us into the hwgroup.
1046 * This must be done early, do ensure that unexpected_intr
1047 * can find the hwif and prevent irq storms.
1048 * No drives are attached to the new hwif, choose_drive
1049 * can't do anything stupid (yet).
1050 * Add ourself as the 2nd entry to the hwgroup->hwif
1051 * linked list, the first entry is the hwif that owns
1052 * hwgroup->handler - do not change that.
1054 spin_lock_irq(&hwgroup
->lock
);
1055 hwif
->next
= hwgroup
->hwif
->next
;
1056 hwgroup
->hwif
->next
= hwif
;
1057 BUG_ON(hwif
->next
== hwif
);
1058 spin_unlock_irq(&hwgroup
->lock
);
1060 hwgroup
= kmalloc_node(sizeof(*hwgroup
), GFP_KERNEL
|__GFP_ZERO
,
1061 hwif_to_node(hwif
));
1062 if (hwgroup
== NULL
)
1065 spin_lock_init(&hwgroup
->lock
);
1067 hwif
->hwgroup
= hwgroup
;
1068 hwgroup
->hwif
= hwif
->next
= hwif
;
1070 init_timer(&hwgroup
->timer
);
1071 hwgroup
->timer
.function
= &ide_timer_expiry
;
1072 hwgroup
->timer
.data
= (unsigned long) hwgroup
;
1075 ide_ports
[hwif
->index
] = hwif
;
1078 * Allocate the irq, if not already obtained for another hwif
1080 if (!match
|| match
->irq
!= hwif
->irq
) {
1082 #if defined(__mc68000__)
1084 #endif /* __mc68000__ */
1086 if (hwif
->chipset
== ide_pci
)
1089 if (io_ports
->ctl_addr
)
1090 hwif
->tp_ops
->set_irq(hwif
, 1);
1092 if (request_irq(hwif
->irq
,&ide_intr
,sa
,hwif
->name
,hwgroup
))
1096 if (!hwif
->rqsize
) {
1097 if ((hwif
->host_flags
& IDE_HFLAG_NO_LBA48
) ||
1098 (hwif
->host_flags
& IDE_HFLAG_NO_LBA48_DMA
))
1101 hwif
->rqsize
= 65536;
1104 #if !defined(__mc68000__)
1105 printk(KERN_INFO
"%s at 0x%03lx-0x%03lx,0x%03lx on irq %d", hwif
->name
,
1106 io_ports
->data_addr
, io_ports
->status_addr
,
1107 io_ports
->ctl_addr
, hwif
->irq
);
1109 printk(KERN_INFO
"%s at 0x%08lx on irq %d", hwif
->name
,
1110 io_ports
->data_addr
, hwif
->irq
);
1111 #endif /* __mc68000__ */
1113 printk(KERN_CONT
" (serialized with %s)", match
->name
);
1114 printk(KERN_CONT
"\n");
1116 mutex_unlock(&ide_cfg_mtx
);
1119 ide_remove_port_from_hwgroup(hwif
);
1121 mutex_unlock(&ide_cfg_mtx
);
1125 static int ata_lock(dev_t dev
, void *data
)
1127 /* FIXME: we want to pin hwif down */
1131 static struct kobject
*ata_probe(dev_t dev
, int *part
, void *data
)
1133 ide_hwif_t
*hwif
= data
;
1134 int unit
= *part
>> PARTN_BITS
;
1135 ide_drive_t
*drive
= &hwif
->drives
[unit
];
1137 if ((drive
->dev_flags
& IDE_DFLAG_PRESENT
) == 0)
1140 if (drive
->media
== ide_disk
)
1141 request_module("ide-disk");
1142 if (drive
->dev_flags
& IDE_DFLAG_SCSI
)
1143 request_module("ide-scsi");
1144 if (drive
->media
== ide_cdrom
|| drive
->media
== ide_optical
)
1145 request_module("ide-cd");
1146 if (drive
->media
== ide_tape
)
1147 request_module("ide-tape");
1148 if (drive
->media
== ide_floppy
)
1149 request_module("ide-floppy");
1154 static struct kobject
*exact_match(dev_t dev
, int *part
, void *data
)
1156 struct gendisk
*p
= data
;
1157 *part
&= (1 << PARTN_BITS
) - 1;
1158 return &disk_to_dev(p
)->kobj
;
1161 static int exact_lock(dev_t dev
, void *data
)
1163 struct gendisk
*p
= data
;
1170 void ide_register_region(struct gendisk
*disk
)
1172 blk_register_region(MKDEV(disk
->major
, disk
->first_minor
),
1173 disk
->minors
, NULL
, exact_match
, exact_lock
, disk
);
1176 EXPORT_SYMBOL_GPL(ide_register_region
);
1178 void ide_unregister_region(struct gendisk
*disk
)
1180 blk_unregister_region(MKDEV(disk
->major
, disk
->first_minor
),
1184 EXPORT_SYMBOL_GPL(ide_unregister_region
);
1186 void ide_init_disk(struct gendisk
*disk
, ide_drive_t
*drive
)
1188 ide_hwif_t
*hwif
= drive
->hwif
;
1189 unsigned int unit
= drive
->dn
& 1;
1191 disk
->major
= hwif
->major
;
1192 disk
->first_minor
= unit
<< PARTN_BITS
;
1193 sprintf(disk
->disk_name
, "hd%c", 'a' + hwif
->index
* MAX_DRIVES
+ unit
);
1194 disk
->queue
= drive
->queue
;
1197 EXPORT_SYMBOL_GPL(ide_init_disk
);
1199 static void ide_remove_drive_from_hwgroup(ide_drive_t
*drive
)
1201 ide_hwgroup_t
*hwgroup
= drive
->hwif
->hwgroup
;
1203 if (drive
== drive
->next
) {
1204 /* special case: last drive from hwgroup. */
1205 BUG_ON(hwgroup
->drive
!= drive
);
1206 hwgroup
->drive
= NULL
;
1210 walk
= hwgroup
->drive
;
1211 while (walk
->next
!= drive
)
1213 walk
->next
= drive
->next
;
1214 if (hwgroup
->drive
== drive
) {
1215 hwgroup
->drive
= drive
->next
;
1216 hwgroup
->hwif
= hwgroup
->drive
->hwif
;
1219 BUG_ON(hwgroup
->drive
== drive
);
1222 static void drive_release_dev (struct device
*dev
)
1224 ide_drive_t
*drive
= container_of(dev
, ide_drive_t
, gendev
);
1225 ide_hwgroup_t
*hwgroup
= drive
->hwif
->hwgroup
;
1227 ide_proc_unregister_device(drive
);
1229 spin_lock_irq(&hwgroup
->lock
);
1230 ide_remove_drive_from_hwgroup(drive
);
1233 drive
->dev_flags
&= ~IDE_DFLAG_PRESENT
;
1234 /* Messed up locking ... */
1235 spin_unlock_irq(&hwgroup
->lock
);
1236 blk_cleanup_queue(drive
->queue
);
1237 spin_lock_irq(&hwgroup
->lock
);
1238 drive
->queue
= NULL
;
1239 spin_unlock_irq(&hwgroup
->lock
);
1241 complete(&drive
->gendev_rel_comp
);
1244 static int hwif_init(ide_hwif_t
*hwif
)
1249 hwif
->irq
= __ide_default_irq(hwif
->io_ports
.data_addr
);
1251 printk(KERN_ERR
"%s: disabled, no IRQ\n", hwif
->name
);
1256 if (register_blkdev(hwif
->major
, hwif
->name
))
1259 if (!hwif
->sg_max_nents
)
1260 hwif
->sg_max_nents
= PRD_ENTRIES
;
1262 hwif
->sg_table
= kmalloc(sizeof(struct scatterlist
)*hwif
->sg_max_nents
,
1264 if (!hwif
->sg_table
) {
1265 printk(KERN_ERR
"%s: unable to allocate SG table.\n", hwif
->name
);
1269 sg_init_table(hwif
->sg_table
, hwif
->sg_max_nents
);
1271 if (init_irq(hwif
) == 0)
1274 old_irq
= hwif
->irq
;
1276 * It failed to initialise. Find the default IRQ for
1277 * this port and try that.
1279 hwif
->irq
= __ide_default_irq(hwif
->io_ports
.data_addr
);
1281 printk(KERN_ERR
"%s: disabled, unable to get IRQ %d\n",
1282 hwif
->name
, old_irq
);
1285 if (init_irq(hwif
)) {
1286 printk(KERN_ERR
"%s: probed IRQ %d and default IRQ %d failed\n",
1287 hwif
->name
, old_irq
, hwif
->irq
);
1290 printk(KERN_WARNING
"%s: probed IRQ %d failed, using default\n",
1291 hwif
->name
, hwif
->irq
);
1294 blk_register_region(MKDEV(hwif
->major
, 0), MAX_DRIVES
<< PARTN_BITS
,
1295 THIS_MODULE
, ata_probe
, ata_lock
, hwif
);
1299 unregister_blkdev(hwif
->major
, hwif
->name
);
1303 static void hwif_register_devices(ide_hwif_t
*hwif
)
1307 for (i
= 0; i
< MAX_DRIVES
; i
++) {
1308 ide_drive_t
*drive
= &hwif
->drives
[i
];
1309 struct device
*dev
= &drive
->gendev
;
1312 if ((drive
->dev_flags
& IDE_DFLAG_PRESENT
) == 0)
1315 dev_set_name(dev
, "%u.%u", hwif
->index
, i
);
1316 dev
->parent
= &hwif
->gendev
;
1317 dev
->bus
= &ide_bus_type
;
1318 dev
->driver_data
= drive
;
1319 dev
->release
= drive_release_dev
;
1321 ret
= device_register(dev
);
1323 printk(KERN_WARNING
"IDE: %s: device_register error: "
1324 "%d\n", __func__
, ret
);
1328 static void ide_port_init_devices(ide_hwif_t
*hwif
)
1330 const struct ide_port_ops
*port_ops
= hwif
->port_ops
;
1333 for (i
= 0; i
< MAX_DRIVES
; i
++) {
1334 ide_drive_t
*drive
= &hwif
->drives
[i
];
1336 drive
->dn
= i
+ hwif
->channel
* 2;
1338 if (hwif
->host_flags
& IDE_HFLAG_IO_32BIT
)
1339 drive
->io_32bit
= 1;
1340 if (hwif
->host_flags
& IDE_HFLAG_UNMASK_IRQS
)
1341 drive
->dev_flags
|= IDE_DFLAG_UNMASK
;
1342 if (hwif
->host_flags
& IDE_HFLAG_NO_UNMASK_IRQS
)
1343 drive
->dev_flags
|= IDE_DFLAG_NO_UNMASK
;
1345 if (port_ops
&& port_ops
->init_dev
)
1346 port_ops
->init_dev(drive
);
1350 static void ide_init_port(ide_hwif_t
*hwif
, unsigned int port
,
1351 const struct ide_port_info
*d
)
1353 hwif
->channel
= port
;
1356 hwif
->chipset
= d
->chipset
;
1361 if ((!hwif
->irq
&& (d
->host_flags
& IDE_HFLAG_LEGACY_IRQS
)) ||
1362 (d
->host_flags
& IDE_HFLAG_FORCE_LEGACY_IRQS
))
1363 hwif
->irq
= port
? 15 : 14;
1365 /* ->host_flags may be set by ->init_iops (or even earlier...) */
1366 hwif
->host_flags
|= d
->host_flags
;
1367 hwif
->pio_mask
= d
->pio_mask
;
1370 hwif
->tp_ops
= d
->tp_ops
;
1372 /* ->set_pio_mode for DTC2278 is currently limited to port 0 */
1373 if (hwif
->chipset
!= ide_dtc2278
|| hwif
->channel
== 0)
1374 hwif
->port_ops
= d
->port_ops
;
1376 hwif
->swdma_mask
= d
->swdma_mask
;
1377 hwif
->mwdma_mask
= d
->mwdma_mask
;
1378 hwif
->ultra_mask
= d
->udma_mask
;
1380 if ((d
->host_flags
& IDE_HFLAG_NO_DMA
) == 0) {
1384 rc
= d
->init_dma(hwif
, d
);
1386 rc
= ide_hwif_setup_dma(hwif
, d
);
1389 printk(KERN_INFO
"%s: DMA disabled\n", hwif
->name
);
1391 hwif
->swdma_mask
= 0;
1392 hwif
->mwdma_mask
= 0;
1393 hwif
->ultra_mask
= 0;
1394 } else if (d
->dma_ops
)
1395 hwif
->dma_ops
= d
->dma_ops
;
1398 if ((d
->host_flags
& IDE_HFLAG_SERIALIZE
) ||
1399 ((d
->host_flags
& IDE_HFLAG_SERIALIZE_DMA
) && hwif
->dma_base
))
1400 hwif
->host
->host_flags
|= IDE_HFLAG_SERIALIZE
;
1403 hwif
->rqsize
= d
->max_sectors
;
1405 /* call chipset specific routine for each enabled port */
1410 static void ide_port_cable_detect(ide_hwif_t
*hwif
)
1412 const struct ide_port_ops
*port_ops
= hwif
->port_ops
;
1414 if (port_ops
&& port_ops
->cable_detect
&& (hwif
->ultra_mask
& 0x78)) {
1415 if (hwif
->cbl
!= ATA_CBL_PATA40_SHORT
)
1416 hwif
->cbl
= port_ops
->cable_detect(hwif
);
1420 static ssize_t
store_delete_devices(struct device
*portdev
,
1421 struct device_attribute
*attr
,
1422 const char *buf
, size_t n
)
1424 ide_hwif_t
*hwif
= dev_get_drvdata(portdev
);
1426 if (strncmp(buf
, "1", n
))
1429 ide_port_unregister_devices(hwif
);
1434 static DEVICE_ATTR(delete_devices
, S_IWUSR
, NULL
, store_delete_devices
);
1436 static ssize_t
store_scan(struct device
*portdev
,
1437 struct device_attribute
*attr
,
1438 const char *buf
, size_t n
)
1440 ide_hwif_t
*hwif
= dev_get_drvdata(portdev
);
1442 if (strncmp(buf
, "1", n
))
1445 ide_port_unregister_devices(hwif
);
1446 ide_port_scan(hwif
);
1451 static DEVICE_ATTR(scan
, S_IWUSR
, NULL
, store_scan
);
1453 static struct device_attribute
*ide_port_attrs
[] = {
1454 &dev_attr_delete_devices
,
1459 static int ide_sysfs_register_port(ide_hwif_t
*hwif
)
1461 int i
, uninitialized_var(rc
);
1463 for (i
= 0; ide_port_attrs
[i
]; i
++) {
1464 rc
= device_create_file(hwif
->portdev
, ide_port_attrs
[i
]);
1472 static unsigned int ide_indexes
;
1475 * ide_find_port_slot - find free port slot
1478 * Return the new port slot index or -ENOENT if we are out of free slots.
1481 static int ide_find_port_slot(const struct ide_port_info
*d
)
1484 u8 bootable
= (d
&& (d
->host_flags
& IDE_HFLAG_NON_BOOTABLE
)) ? 0 : 1;
1485 u8 i
= (d
&& (d
->host_flags
& IDE_HFLAG_QD_2ND_PORT
)) ? 1 : 0;;
1488 * Claim an unassigned slot.
1490 * Give preference to claiming other slots before claiming ide0/ide1,
1491 * just in case there's another interface yet-to-be-scanned
1492 * which uses ports 0x1f0/0x170 (the ide0/ide1 defaults).
1494 * Unless there is a bootable card that does not use the standard
1495 * ports 0x1f0/0x170 (the ide0/ide1 defaults).
1497 mutex_lock(&ide_cfg_mtx
);
1499 if ((ide_indexes
| i
) != (1 << MAX_HWIFS
) - 1)
1500 idx
= ffz(ide_indexes
| i
);
1502 if ((ide_indexes
| 3) != (1 << MAX_HWIFS
) - 1)
1503 idx
= ffz(ide_indexes
| 3);
1504 else if ((ide_indexes
& 3) != 3)
1505 idx
= ffz(ide_indexes
);
1508 ide_indexes
|= (1 << idx
);
1509 mutex_unlock(&ide_cfg_mtx
);
1514 static void ide_free_port_slot(int idx
)
1516 mutex_lock(&ide_cfg_mtx
);
1517 ide_indexes
&= ~(1 << idx
);
1518 mutex_unlock(&ide_cfg_mtx
);
1521 struct ide_host
*ide_host_alloc(const struct ide_port_info
*d
, hw_regs_t
**hws
)
1523 struct ide_host
*host
;
1526 host
= kzalloc(sizeof(*host
), GFP_KERNEL
);
1530 for (i
= 0; i
< MAX_HOST_PORTS
; i
++) {
1537 hwif
= kzalloc(sizeof(*hwif
), GFP_KERNEL
);
1541 idx
= ide_find_port_slot(d
);
1543 printk(KERN_ERR
"%s: no free slot for interface\n",
1544 d
? d
->name
: "ide");
1549 ide_init_port_data(hwif
, idx
);
1553 host
->ports
[i
] = hwif
;
1557 if (host
->n_ports
== 0) {
1563 host
->dev
[0] = hws
[0]->dev
;
1566 host
->init_chipset
= d
->init_chipset
;
1567 host
->host_flags
= d
->host_flags
;
1572 EXPORT_SYMBOL_GPL(ide_host_alloc
);
1574 int ide_host_register(struct ide_host
*host
, const struct ide_port_info
*d
,
1577 ide_hwif_t
*hwif
, *mate
= NULL
;
1580 for (i
= 0; i
< MAX_HOST_PORTS
; i
++) {
1581 hwif
= host
->ports
[i
];
1588 ide_init_port_hw(hwif
, hws
[i
]);
1589 ide_port_apply_params(hwif
);
1594 if ((i
& 1) && mate
) {
1599 mate
= (i
& 1) ? NULL
: hwif
;
1601 ide_init_port(hwif
, i
& 1, d
);
1602 ide_port_cable_detect(hwif
);
1605 ide_port_init_devices(hwif
);
1608 for (i
= 0; i
< MAX_HOST_PORTS
; i
++) {
1609 hwif
= host
->ports
[i
];
1614 if (ide_probe_port(hwif
) == 0)
1617 if (hwif
->chipset
!= ide_4drives
|| !hwif
->mate
||
1618 !hwif
->mate
->present
)
1619 ide_register_port(hwif
);
1622 ide_port_tune_devices(hwif
);
1625 for (i
= 0; i
< MAX_HOST_PORTS
; i
++) {
1626 hwif
= host
->ports
[i
];
1631 if (hwif_init(hwif
) == 0) {
1632 printk(KERN_INFO
"%s: failed to initialize IDE "
1633 "interface\n", hwif
->name
);
1639 if (ide_port_setup_devices(hwif
) == 0) {
1646 ide_acpi_init(hwif
);
1649 ide_acpi_port_init_devices(hwif
);
1652 for (i
= 0; i
< MAX_HOST_PORTS
; i
++) {
1653 hwif
= host
->ports
[i
];
1658 if (hwif
->chipset
== ide_unknown
)
1659 hwif
->chipset
= ide_generic
;
1662 hwif_register_devices(hwif
);
1665 for (i
= 0; i
< MAX_HOST_PORTS
; i
++) {
1666 hwif
= host
->ports
[i
];
1671 ide_sysfs_register_port(hwif
);
1672 ide_proc_register_port(hwif
);
1675 ide_proc_port_register_devices(hwif
);
1680 EXPORT_SYMBOL_GPL(ide_host_register
);
1682 int ide_host_add(const struct ide_port_info
*d
, hw_regs_t
**hws
,
1683 struct ide_host
**hostp
)
1685 struct ide_host
*host
;
1688 host
= ide_host_alloc(d
, hws
);
1692 rc
= ide_host_register(host
, d
, hws
);
1694 ide_host_free(host
);
1703 EXPORT_SYMBOL_GPL(ide_host_add
);
1705 void ide_host_free(struct ide_host
*host
)
1710 for (i
= 0; i
< MAX_HOST_PORTS
; i
++) {
1711 hwif
= host
->ports
[i
];
1716 ide_free_port_slot(hwif
->index
);
1722 EXPORT_SYMBOL_GPL(ide_host_free
);
1724 void ide_host_remove(struct ide_host
*host
)
1728 for (i
= 0; i
< MAX_HOST_PORTS
; i
++) {
1730 ide_unregister(host
->ports
[i
]);
1733 ide_host_free(host
);
1735 EXPORT_SYMBOL_GPL(ide_host_remove
);
1737 void ide_port_scan(ide_hwif_t
*hwif
)
1739 ide_port_apply_params(hwif
);
1740 ide_port_cable_detect(hwif
);
1741 ide_port_init_devices(hwif
);
1743 if (ide_probe_port(hwif
) < 0)
1748 ide_port_tune_devices(hwif
);
1749 ide_acpi_port_init_devices(hwif
);
1750 ide_port_setup_devices(hwif
);
1751 hwif_register_devices(hwif
);
1752 ide_proc_port_register_devices(hwif
);
1754 EXPORT_SYMBOL_GPL(ide_port_scan
);