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 inline void do_identify (ide_drive_t
*drive
, u8 cmd
)
116 ide_hwif_t
*hwif
= HWIF(drive
);
118 char *m
= (char *)&id
[ATA_ID_PROD
];
119 int bswap
= 1, is_cfa
;
121 /* read 512 bytes of id info */
122 hwif
->tp_ops
->input_data(drive
, NULL
, id
, SECTOR_SIZE
);
124 drive
->dev_flags
|= IDE_DFLAG_ID_READ
;
128 printk(KERN_INFO
"%s: dumping identify data\n", drive
->name
);
129 ide_dump_identify((u8
*)id
);
134 * ATA_CMD_ID_ATA returns little-endian info,
135 * ATA_CMD_ID_ATAPI *usually* returns little-endian info.
137 if (cmd
== ATA_CMD_ID_ATAPI
) {
138 if ((m
[0] == 'N' && m
[1] == 'E') || /* NEC */
139 (m
[0] == 'F' && m
[1] == 'X') || /* Mitsumi */
140 (m
[0] == 'P' && m
[1] == 'i')) /* Pioneer */
141 /* Vertos drives may still be weird */
145 ide_fixstring(m
, ATA_ID_PROD_LEN
, bswap
);
146 ide_fixstring((char *)&id
[ATA_ID_FW_REV
], ATA_ID_FW_REV_LEN
, bswap
);
147 ide_fixstring((char *)&id
[ATA_ID_SERNO
], ATA_ID_SERNO_LEN
, bswap
);
149 /* we depend on this a lot! */
150 m
[ATA_ID_PROD_LEN
- 1] = '\0';
152 if (strstr(m
, "E X A B Y T E N E S T"))
155 printk(KERN_INFO
"%s: %s, ", drive
->name
, m
);
157 drive
->dev_flags
|= IDE_DFLAG_PRESENT
;
158 drive
->dev_flags
&= ~IDE_DFLAG_DEAD
;
161 * Check for an ATAPI device
163 if (cmd
== ATA_CMD_ID_ATAPI
) {
164 u8 type
= (id
[ATA_ID_CONFIG
] >> 8) & 0x1f;
166 printk(KERN_CONT
"ATAPI ");
169 if (!strstr(m
, "CD-ROM")) {
170 if (!strstr(m
, "oppy") &&
171 !strstr(m
, "poyp") &&
173 printk(KERN_CONT
"cdrom or floppy?, assuming ");
174 if (drive
->media
!= ide_cdrom
) {
175 printk(KERN_CONT
"FLOPPY");
176 drive
->dev_flags
|= IDE_DFLAG_REMOVABLE
;
180 /* Early cdrom models used zero */
183 drive
->dev_flags
|= IDE_DFLAG_REMOVABLE
;
185 /* kludge for Apple PowerBook internal zip */
186 if (!strstr(m
, "CD-ROM") && strstr(m
, "ZIP")) {
187 printk(KERN_CONT
"FLOPPY");
192 printk(KERN_CONT
"CD/DVD-ROM");
195 printk(KERN_CONT
"TAPE");
198 printk(KERN_CONT
"OPTICAL");
199 drive
->dev_flags
|= IDE_DFLAG_REMOVABLE
;
202 printk(KERN_CONT
"UNKNOWN (type %d)", type
);
205 printk(KERN_CONT
" drive\n");
207 /* an ATAPI device ignores DRDY */
208 drive
->ready_stat
= 0;
213 * Not an ATAPI device: looks like a "regular" hard disk
216 is_cfa
= ata_id_is_cfa(id
);
218 /* CF devices are *not* removable in Linux definition of the term */
219 if (is_cfa
== 0 && (id
[ATA_ID_CONFIG
] & (1 << 7)))
220 drive
->dev_flags
|= IDE_DFLAG_REMOVABLE
;
222 drive
->media
= ide_disk
;
224 printk(KERN_CONT
"%s DISK drive\n", is_cfa
? "CFA" : "ATA");
230 drive
->dev_flags
&= ~IDE_DFLAG_PRESENT
;
235 * actual_try_to_identify - send ata/atapi identify
236 * @drive: drive to identify
237 * @cmd: command to use
239 * try_to_identify() sends an ATA(PI) IDENTIFY request to a drive
240 * and waits for a response. It also monitors irqs while this is
241 * happening, in hope of automatically determining which one is
242 * being used by the interface.
244 * Returns: 0 device was identified
245 * 1 device timed-out (no response to identify request)
246 * 2 device aborted the command (refused to identify itself)
249 static int actual_try_to_identify (ide_drive_t
*drive
, u8 cmd
)
251 ide_hwif_t
*hwif
= HWIF(drive
);
252 struct ide_io_ports
*io_ports
= &hwif
->io_ports
;
253 const struct ide_tp_ops
*tp_ops
= hwif
->tp_ops
;
254 int use_altstatus
= 0, rc
;
255 unsigned long timeout
;
258 /* take a deep breath */
261 if (io_ports
->ctl_addr
) {
262 a
= tp_ops
->read_altstatus(hwif
);
263 s
= tp_ops
->read_status(hwif
);
264 if ((a
^ s
) & ~ATA_IDX
)
265 /* ancient Seagate drives, broken interfaces */
266 printk(KERN_INFO
"%s: probing with STATUS(0x%02x) "
267 "instead of ALTSTATUS(0x%02x)\n",
270 /* use non-intrusive polling */
274 /* set features register for atapi
275 * identify command to be sure of reply
277 if (cmd
== ATA_CMD_ID_ATAPI
) {
280 memset(&task
, 0, sizeof(task
));
281 /* disable DMA & overlap */
282 task
.tf_flags
= IDE_TFLAG_OUT_FEATURE
;
284 tp_ops
->tf_load(drive
, &task
);
287 /* ask drive for ID */
288 tp_ops
->exec_command(hwif
, cmd
);
290 timeout
= ((cmd
== ATA_CMD_ID_ATA
) ? WAIT_WORSTCASE
: WAIT_PIDENTIFY
) / 2;
292 if (ide_busy_sleep(hwif
, timeout
, use_altstatus
))
295 /* wait for IRQ and ATA_DRQ */
297 s
= tp_ops
->read_status(hwif
);
299 if (OK_STAT(s
, ATA_DRQ
, BAD_R_STAT
)) {
302 /* local CPU only; some systems need this */
303 local_irq_save(flags
);
304 /* drive returned ID */
305 do_identify(drive
, cmd
);
306 /* drive responded with ID */
308 /* clear drive IRQ */
309 (void)tp_ops
->read_status(hwif
);
310 local_irq_restore(flags
);
312 /* drive refused ID */
319 * try_to_identify - try to identify a drive
320 * @drive: drive to probe
321 * @cmd: command to use
323 * Issue the identify command and then do IRQ probing to
324 * complete the identification when needed by finding the
325 * IRQ the drive is attached to
328 static int try_to_identify (ide_drive_t
*drive
, u8 cmd
)
330 ide_hwif_t
*hwif
= HWIF(drive
);
331 const struct ide_tp_ops
*tp_ops
= hwif
->tp_ops
;
334 unsigned long cookie
= 0;
337 * Disable device irq unless we need to
338 * probe for it. Otherwise we'll get spurious
339 * interrupts during the identify-phase that
340 * the irq handler isn't expecting.
342 if (hwif
->io_ports
.ctl_addr
) {
345 cookie
= probe_irq_on();
347 tp_ops
->set_irq(hwif
, autoprobe
);
350 retval
= actual_try_to_identify(drive
, cmd
);
355 tp_ops
->set_irq(hwif
, 0);
356 /* clear drive IRQ */
357 (void)tp_ops
->read_status(hwif
);
359 irq
= probe_irq_off(cookie
);
364 /* Mmmm.. multiple IRQs..
365 * don't know which was ours
367 printk(KERN_ERR
"%s: IRQ probe failed (0x%lx)\n",
368 drive
->name
, cookie
);
375 int ide_busy_sleep(ide_hwif_t
*hwif
, unsigned long timeout
, int altstatus
)
382 msleep(50); /* give drive a breather */
383 stat
= altstatus
? hwif
->tp_ops
->read_altstatus(hwif
)
384 : hwif
->tp_ops
->read_status(hwif
);
385 if ((stat
& ATA_BUSY
) == 0)
387 } while (time_before(jiffies
, timeout
));
389 return 1; /* drive timed-out */
392 static u8
ide_read_device(ide_drive_t
*drive
)
396 memset(&task
, 0, sizeof(task
));
397 task
.tf_flags
= IDE_TFLAG_IN_DEVICE
;
399 drive
->hwif
->tp_ops
->tf_read(drive
, &task
);
401 return task
.tf
.device
;
405 * do_probe - probe an IDE device
406 * @drive: drive to probe
407 * @cmd: command to use
409 * do_probe() has the difficult job of finding a drive if it exists,
410 * without getting hung up if it doesn't exist, without trampling on
411 * ethernet cards, and without leaving any IRQs dangling to haunt us later.
413 * If a drive is "known" to exist (from CMOS or kernel parameters),
414 * but does not respond right away, the probe will "hang in there"
415 * for the maximum wait time (about 30 seconds), otherwise it will
416 * exit much more quickly.
418 * Returns: 0 device was identified
419 * 1 device timed-out (no response to identify request)
420 * 2 device aborted the command (refused to identify itself)
421 * 3 bad status from device (possible for ATAPI drives)
422 * 4 probe was not attempted because failure was obvious
425 static int do_probe (ide_drive_t
*drive
, u8 cmd
)
427 ide_hwif_t
*hwif
= HWIF(drive
);
428 const struct ide_tp_ops
*tp_ops
= hwif
->tp_ops
;
430 u8 present
= !!(drive
->dev_flags
& IDE_DFLAG_PRESENT
), stat
;
432 /* avoid waiting for inappropriate probes */
433 if (present
&& drive
->media
!= ide_disk
&& cmd
== ATA_CMD_ID_ATA
)
437 printk(KERN_INFO
"probing for %s: present=%d, media=%d, probetype=%s\n",
438 drive
->name
, present
, drive
->media
,
439 (cmd
== ATA_CMD_ID_ATA
) ? "ATA" : "ATAPI");
442 /* needed for some systems
443 * (e.g. crw9624 as drive0 with disk as slave)
449 if (ide_read_device(drive
) != drive
->select
.all
&& present
== 0) {
450 if (drive
->select
.b
.unit
!= 0) {
451 /* exit with drive0 selected */
452 SELECT_DRIVE(&hwif
->drives
[0]);
453 /* allow ATA_BUSY to assert & clear */
456 /* no i/f present: mmm.. this should be a 4 -ml */
460 stat
= tp_ops
->read_status(hwif
);
462 if (OK_STAT(stat
, ATA_DRDY
, ATA_BUSY
) ||
463 present
|| cmd
== ATA_CMD_ID_ATAPI
) {
464 /* send cmd and wait */
465 if ((rc
= try_to_identify(drive
, cmd
))) {
466 /* failed: try again */
467 rc
= try_to_identify(drive
,cmd
);
470 stat
= tp_ops
->read_status(hwif
);
472 if (stat
== (ATA_BUSY
| ATA_DRDY
))
475 if (rc
== 1 && cmd
== ATA_CMD_ID_ATAPI
) {
476 printk(KERN_ERR
"%s: no response (status = 0x%02x), "
477 "resetting drive\n", drive
->name
, stat
);
481 tp_ops
->exec_command(hwif
, ATA_CMD_DEV_RESET
);
482 (void)ide_busy_sleep(hwif
, WAIT_WORSTCASE
, 0);
483 rc
= try_to_identify(drive
, cmd
);
486 /* ensure drive IRQ is clear */
487 stat
= tp_ops
->read_status(hwif
);
490 printk(KERN_ERR
"%s: no response (status = 0x%02x)\n",
493 /* not present or maybe ATAPI */
496 if (drive
->select
.b
.unit
!= 0) {
497 /* exit with drive0 selected */
498 SELECT_DRIVE(&hwif
->drives
[0]);
500 /* ensure drive irq is clear */
501 (void)tp_ops
->read_status(hwif
);
509 static void enable_nest (ide_drive_t
*drive
)
511 ide_hwif_t
*hwif
= HWIF(drive
);
512 const struct ide_tp_ops
*tp_ops
= hwif
->tp_ops
;
515 printk(KERN_INFO
"%s: enabling %s -- ",
516 hwif
->name
, (char *)&drive
->id
[ATA_ID_PROD
]);
520 tp_ops
->exec_command(hwif
, ATA_EXABYTE_ENABLE_NEST
);
522 if (ide_busy_sleep(hwif
, WAIT_WORSTCASE
, 0)) {
523 printk(KERN_CONT
"failed (timeout)\n");
529 stat
= tp_ops
->read_status(hwif
);
531 if (!OK_STAT(stat
, 0, BAD_STAT
))
532 printk(KERN_CONT
"failed (status = 0x%02x)\n", stat
);
534 printk(KERN_CONT
"success\n");
538 * probe_for_drives - upper level drive probe
539 * @drive: drive to probe for
541 * probe_for_drive() tests for existence of a given drive using do_probe()
542 * and presents things to the user as needed.
544 * Returns: 0 no device was found
546 * (note: IDE_DFLAG_PRESENT might still be not set)
549 static inline u8
probe_for_drive (ide_drive_t
*drive
)
554 * In order to keep things simple we have an id
555 * block for all drives at all times. If the device
556 * is pre ATA or refuses ATA/ATAPI identify we
557 * will add faked data to this.
559 * Also note that 0 everywhere means "can't do X"
562 drive
->dev_flags
&= ~IDE_DFLAG_ID_READ
;
564 drive
->id
= kzalloc(SECTOR_SIZE
, GFP_KERNEL
);
565 if (drive
->id
== NULL
) {
566 printk(KERN_ERR
"ide: out of memory for id data.\n");
570 m
= (char *)&drive
->id
[ATA_ID_PROD
];
571 strcpy(m
, "UNKNOWN");
574 if ((drive
->dev_flags
& IDE_DFLAG_NOPROBE
) == 0) {
576 /* if !(success||timed-out) */
577 if (do_probe(drive
, ATA_CMD_ID_ATA
) >= 2)
578 /* look for ATAPI device */
579 (void)do_probe(drive
, ATA_CMD_ID_ATAPI
);
581 if ((drive
->dev_flags
& IDE_DFLAG_PRESENT
) == 0)
582 /* drive not found */
585 if (strstr(m
, "E X A B Y T E N E S T")) {
590 /* identification failed? */
591 if ((drive
->dev_flags
& IDE_DFLAG_ID_READ
) == 0) {
592 if (drive
->media
== ide_disk
) {
593 printk(KERN_INFO
"%s: non-IDE drive, CHS=%d/%d/%d\n",
594 drive
->name
, drive
->cyl
,
595 drive
->head
, drive
->sect
);
596 } else if (drive
->media
== ide_cdrom
) {
597 printk(KERN_INFO
"%s: ATAPI cdrom (?)\n", drive
->name
);
600 printk(KERN_WARNING
"%s: Unknown device on bus refused identification. Ignoring.\n", drive
->name
);
601 drive
->dev_flags
&= ~IDE_DFLAG_PRESENT
;
604 /* drive was found */
607 if ((drive
->dev_flags
& IDE_DFLAG_PRESENT
) == 0)
610 /* The drive wasn't being helpful. Add generic info only */
611 if ((drive
->dev_flags
& IDE_DFLAG_ID_READ
) == 0) {
616 if (drive
->media
== ide_disk
) {
617 ide_disk_init_chs(drive
);
618 ide_disk_init_mult_count(drive
);
621 return !!(drive
->dev_flags
& IDE_DFLAG_PRESENT
);
624 static void hwif_release_dev(struct device
*dev
)
626 ide_hwif_t
*hwif
= container_of(dev
, ide_hwif_t
, gendev
);
628 complete(&hwif
->gendev_rel_comp
);
631 static int ide_register_port(ide_hwif_t
*hwif
)
635 /* register with global device tree */
636 strlcpy(hwif
->gendev
.bus_id
,hwif
->name
,BUS_ID_SIZE
);
637 hwif
->gendev
.driver_data
= hwif
;
638 if (hwif
->gendev
.parent
== NULL
) {
640 hwif
->gendev
.parent
= hwif
->dev
;
642 /* Would like to do = &device_legacy */
643 hwif
->gendev
.parent
= NULL
;
645 hwif
->gendev
.release
= hwif_release_dev
;
646 ret
= device_register(&hwif
->gendev
);
648 printk(KERN_WARNING
"IDE: %s: device_register error: %d\n",
653 hwif
->portdev
= device_create_drvdata(ide_port_class
, &hwif
->gendev
,
654 MKDEV(0, 0), hwif
, hwif
->name
);
655 if (IS_ERR(hwif
->portdev
)) {
656 ret
= PTR_ERR(hwif
->portdev
);
657 device_unregister(&hwif
->gendev
);
664 * ide_port_wait_ready - wait for port to become ready
667 * This is needed on some PPCs and a bunch of BIOS-less embedded
668 * platforms. Typical cases are:
670 * - The firmware hard reset the disk before booting the kernel,
671 * the drive is still doing it's poweron-reset sequence, that
672 * can take up to 30 seconds.
674 * - The firmware does nothing (or no firmware), the device is
675 * still in POST state (same as above actually).
677 * - Some CD/DVD/Writer combo drives tend to drive the bus during
678 * their reset sequence even when they are non-selected slave
679 * devices, thus preventing discovery of the main HD.
681 * Doing this wait-for-non-busy should not harm any existing
682 * configuration and fix some issues like the above.
686 * Returns 0 on success, error code (< 0) otherwise.
689 static int ide_port_wait_ready(ide_hwif_t
*hwif
)
693 printk(KERN_DEBUG
"Probing IDE interface %s...\n", hwif
->name
);
695 /* Let HW settle down a bit from whatever init state we
699 /* Wait for BSY bit to go away, spec timeout is 30 seconds,
700 * I know of at least one disk who takes 31 seconds, I use 35
703 rc
= ide_wait_not_busy(hwif
, 35000);
707 /* Now make sure both master & slave are ready */
708 for (unit
= 0; unit
< MAX_DRIVES
; unit
++) {
709 ide_drive_t
*drive
= &hwif
->drives
[unit
];
711 /* Ignore disks that we will not probe for later. */
712 if ((drive
->dev_flags
& IDE_DFLAG_NOPROBE
) == 0 ||
713 (drive
->dev_flags
& IDE_DFLAG_PRESENT
)) {
715 hwif
->tp_ops
->set_irq(hwif
, 1);
717 rc
= ide_wait_not_busy(hwif
, 35000);
721 printk(KERN_DEBUG
"%s: ide_wait_not_busy() skipped\n",
725 /* Exit function with master reselected (let's be sane) */
727 SELECT_DRIVE(&hwif
->drives
[0]);
733 * ide_undecoded_slave - look for bad CF adapters
734 * @dev1: slave device
736 * Analyse the drives on the interface and attempt to decide if we
737 * have the same drive viewed twice. This occurs with crap CF adapters
738 * and PCMCIA sometimes.
741 void ide_undecoded_slave(ide_drive_t
*dev1
)
743 ide_drive_t
*dev0
= &dev1
->hwif
->drives
[0];
745 if ((dev1
->dn
& 1) == 0 || (dev0
->dev_flags
& IDE_DFLAG_PRESENT
) == 0)
748 /* If the models don't match they are not the same product */
749 if (strcmp((char *)&dev0
->id
[ATA_ID_PROD
],
750 (char *)&dev1
->id
[ATA_ID_PROD
]))
753 /* Serial numbers do not match */
754 if (strncmp((char *)&dev0
->id
[ATA_ID_SERNO
],
755 (char *)&dev1
->id
[ATA_ID_SERNO
], ATA_ID_SERNO_LEN
))
758 /* No serial number, thankfully very rare for CF */
759 if (*(char *)&dev0
->id
[ATA_ID_SERNO
] == 0)
762 /* Appears to be an IDE flash adapter with decode bugs */
763 printk(KERN_WARNING
"ide-probe: ignoring undecoded slave\n");
765 dev1
->dev_flags
&= ~IDE_DFLAG_PRESENT
;
768 EXPORT_SYMBOL_GPL(ide_undecoded_slave
);
770 static int ide_probe_port(ide_hwif_t
*hwif
)
774 int unit
, rc
= -ENODEV
;
776 BUG_ON(hwif
->present
);
778 if ((hwif
->drives
[0].dev_flags
& IDE_DFLAG_NOPROBE
) &&
779 (hwif
->drives
[1].dev_flags
& IDE_DFLAG_NOPROBE
))
783 * We must always disable IRQ, as probe_for_drive will assert IRQ, but
784 * we'll install our IRQ driver much later...
788 disable_irq(hwif
->irq
);
790 local_irq_set(flags
);
792 if (ide_port_wait_ready(hwif
) == -EBUSY
)
793 printk(KERN_DEBUG
"%s: Wait for ready failed before probe !\n", hwif
->name
);
796 * Second drive should only exist if first drive was found,
797 * but a lot of cdrom drives are configured as single slaves.
799 for (unit
= 0; unit
< MAX_DRIVES
; ++unit
) {
800 ide_drive_t
*drive
= &hwif
->drives
[unit
];
801 drive
->dn
= (hwif
->channel
? 2 : 0) + unit
;
802 (void) probe_for_drive(drive
);
803 if (drive
->dev_flags
& IDE_DFLAG_PRESENT
)
807 local_irq_restore(flags
);
810 * Use cached IRQ number. It might be (and is...) changed by probe
819 static void ide_port_tune_devices(ide_hwif_t
*hwif
)
821 const struct ide_port_ops
*port_ops
= hwif
->port_ops
;
824 for (unit
= 0; unit
< MAX_DRIVES
; unit
++) {
825 ide_drive_t
*drive
= &hwif
->drives
[unit
];
827 if (drive
->dev_flags
& IDE_DFLAG_PRESENT
) {
828 if (port_ops
&& port_ops
->quirkproc
)
829 port_ops
->quirkproc(drive
);
833 for (unit
= 0; unit
< MAX_DRIVES
; ++unit
) {
834 ide_drive_t
*drive
= &hwif
->drives
[unit
];
836 if (drive
->dev_flags
& IDE_DFLAG_PRESENT
) {
837 ide_set_max_pio(drive
);
839 drive
->dev_flags
|= IDE_DFLAG_NICE1
;
846 for (unit
= 0; unit
< MAX_DRIVES
; ++unit
) {
847 ide_drive_t
*drive
= &hwif
->drives
[unit
];
849 if ((hwif
->host_flags
& IDE_HFLAG_NO_IO_32BIT
) ||
850 drive
->id
[ATA_ID_DWORD_IO
])
851 drive
->dev_flags
|= IDE_DFLAG_NO_IO_32BIT
;
853 drive
->dev_flags
&= ~IDE_DFLAG_NO_IO_32BIT
;
858 * save_match() is used to simplify logic in init_irq() below.
860 * A loophole here is that we may not know about a particular
861 * hwif's irq until after that hwif is actually probed/initialized..
862 * This could be a problem for the case where an hwif is on a
863 * dual interface that requires serialization (eg. cmd640) and another
864 * hwif using one of the same irqs is initialized beforehand.
866 * This routine detects and reports such situations, but does not fix them.
868 static void save_match(ide_hwif_t
*hwif
, ide_hwif_t
*new, ide_hwif_t
**match
)
870 ide_hwif_t
*m
= *match
;
872 if (m
&& m
->hwgroup
&& m
->hwgroup
!= new->hwgroup
) {
875 printk(KERN_WARNING
"%s: potential IRQ problem with %s and %s\n",
876 hwif
->name
, new->name
, m
->name
);
878 if (!m
|| m
->irq
!= hwif
->irq
) /* don't undo a prior perfect match */
885 static int ide_init_queue(ide_drive_t
*drive
)
887 struct request_queue
*q
;
888 ide_hwif_t
*hwif
= HWIF(drive
);
889 int max_sectors
= 256;
890 int max_sg_entries
= PRD_ENTRIES
;
893 * Our default set up assumes the normal IDE case,
894 * that is 64K segmenting, standard PRD setup
895 * and LBA28. Some drivers then impose their own
896 * limits and LBA48 we could raise it but as yet
900 q
= blk_init_queue_node(do_ide_request
, &ide_lock
, hwif_to_node(hwif
));
904 q
->queuedata
= drive
;
905 blk_queue_segment_boundary(q
, 0xffff);
907 if (hwif
->rqsize
< max_sectors
)
908 max_sectors
= hwif
->rqsize
;
909 blk_queue_max_sectors(q
, max_sectors
);
912 /* When we have an IOMMU, we may have a problem where pci_map_sg()
913 * creates segments that don't completely match our boundary
914 * requirements and thus need to be broken up again. Because it
915 * doesn't align properly either, we may actually have to break up
916 * to more segments than what was we got in the first place, a max
917 * worst case is twice as many.
918 * This will be fixed once we teach pci_map_sg() about our boundary
919 * requirements, hopefully soon. *FIXME*
921 if (!PCI_DMA_BUS_IS_PHYS
)
922 max_sg_entries
>>= 1;
923 #endif /* CONFIG_PCI */
925 blk_queue_max_hw_segments(q
, max_sg_entries
);
926 blk_queue_max_phys_segments(q
, max_sg_entries
);
928 /* assign drive queue */
931 /* needs drive->queue to be set */
932 ide_toggle_bounce(drive
, 1);
937 static void ide_add_drive_to_hwgroup(ide_drive_t
*drive
)
939 ide_hwgroup_t
*hwgroup
= drive
->hwif
->hwgroup
;
941 spin_lock_irq(&ide_lock
);
942 if (!hwgroup
->drive
) {
943 /* first drive for hwgroup. */
945 hwgroup
->drive
= drive
;
946 hwgroup
->hwif
= HWIF(hwgroup
->drive
);
948 drive
->next
= hwgroup
->drive
->next
;
949 hwgroup
->drive
->next
= drive
;
951 spin_unlock_irq(&ide_lock
);
955 * For any present drive:
956 * - allocate the block device queue
957 * - link drive into the hwgroup
959 static void ide_port_setup_devices(ide_hwif_t
*hwif
)
963 mutex_lock(&ide_cfg_mtx
);
964 for (i
= 0; i
< MAX_DRIVES
; i
++) {
965 ide_drive_t
*drive
= &hwif
->drives
[i
];
967 if ((drive
->dev_flags
& IDE_DFLAG_PRESENT
) == 0)
970 if (ide_init_queue(drive
)) {
971 printk(KERN_ERR
"ide: failed to init %s\n",
976 ide_add_drive_to_hwgroup(drive
);
978 mutex_unlock(&ide_cfg_mtx
);
981 static ide_hwif_t
*ide_ports
[MAX_HWIFS
];
983 void ide_remove_port_from_hwgroup(ide_hwif_t
*hwif
)
985 ide_hwgroup_t
*hwgroup
= hwif
->hwgroup
;
987 ide_ports
[hwif
->index
] = NULL
;
989 spin_lock_irq(&ide_lock
);
991 * Remove us from the hwgroup, and free
992 * the hwgroup if we were the only member
994 if (hwif
->next
== hwif
) {
995 BUG_ON(hwgroup
->hwif
!= hwif
);
998 /* There is another interface in hwgroup.
999 * Unlink us, and set hwgroup->drive and ->hwif to
1002 ide_hwif_t
*g
= hwgroup
->hwif
;
1004 while (g
->next
!= hwif
)
1006 g
->next
= hwif
->next
;
1007 if (hwgroup
->hwif
== hwif
) {
1008 /* Chose a random hwif for hwgroup->hwif.
1009 * It's guaranteed that there are no drives
1010 * left in the hwgroup.
1012 BUG_ON(hwgroup
->drive
!= NULL
);
1015 BUG_ON(hwgroup
->hwif
== hwif
);
1017 spin_unlock_irq(&ide_lock
);
1021 * This routine sets up the irq for an ide interface, and creates a new
1022 * hwgroup for the irq/hwif if none was previously assigned.
1024 * Much of the code is for correctly detecting/handling irq sharing
1025 * and irq serialization situations. This is somewhat complex because
1026 * it handles static as well as dynamic (PCMCIA) IDE interfaces.
1028 static int init_irq (ide_hwif_t
*hwif
)
1030 struct ide_io_ports
*io_ports
= &hwif
->io_ports
;
1032 ide_hwgroup_t
*hwgroup
;
1033 ide_hwif_t
*match
= NULL
;
1035 mutex_lock(&ide_cfg_mtx
);
1036 hwif
->hwgroup
= NULL
;
1039 * Group up with any other hwifs that share our irq(s).
1041 for (index
= 0; index
< MAX_HWIFS
; index
++) {
1042 ide_hwif_t
*h
= ide_ports
[index
];
1044 if (h
&& h
->hwgroup
) { /* scan only initialized ports */
1045 if (hwif
->irq
== h
->irq
) {
1046 hwif
->sharing_irq
= h
->sharing_irq
= 1;
1047 if (hwif
->chipset
!= ide_pci
||
1048 h
->chipset
!= ide_pci
) {
1049 save_match(hwif
, h
, &match
);
1052 if (hwif
->serialized
) {
1053 if (hwif
->mate
&& hwif
->mate
->irq
== h
->irq
)
1054 save_match(hwif
, h
, &match
);
1056 if (h
->serialized
) {
1057 if (h
->mate
&& hwif
->irq
== h
->mate
->irq
)
1058 save_match(hwif
, h
, &match
);
1064 * If we are still without a hwgroup, then form a new one
1067 hwgroup
= match
->hwgroup
;
1068 hwif
->hwgroup
= hwgroup
;
1070 * Link us into the hwgroup.
1071 * This must be done early, do ensure that unexpected_intr
1072 * can find the hwif and prevent irq storms.
1073 * No drives are attached to the new hwif, choose_drive
1074 * can't do anything stupid (yet).
1075 * Add ourself as the 2nd entry to the hwgroup->hwif
1076 * linked list, the first entry is the hwif that owns
1077 * hwgroup->handler - do not change that.
1079 spin_lock_irq(&ide_lock
);
1080 hwif
->next
= hwgroup
->hwif
->next
;
1081 hwgroup
->hwif
->next
= hwif
;
1082 BUG_ON(hwif
->next
== hwif
);
1083 spin_unlock_irq(&ide_lock
);
1085 hwgroup
= kmalloc_node(sizeof(*hwgroup
), GFP_KERNEL
|__GFP_ZERO
,
1086 hwif_to_node(hwif
));
1087 if (hwgroup
== NULL
)
1090 hwif
->hwgroup
= hwgroup
;
1091 hwgroup
->hwif
= hwif
->next
= hwif
;
1093 init_timer(&hwgroup
->timer
);
1094 hwgroup
->timer
.function
= &ide_timer_expiry
;
1095 hwgroup
->timer
.data
= (unsigned long) hwgroup
;
1098 ide_ports
[hwif
->index
] = hwif
;
1101 * Allocate the irq, if not already obtained for another hwif
1103 if (!match
|| match
->irq
!= hwif
->irq
) {
1105 #if defined(__mc68000__)
1107 #endif /* __mc68000__ */
1109 if (hwif
->chipset
== ide_pci
|| hwif
->chipset
== ide_cmd646
||
1110 hwif
->chipset
== ide_ali14xx
)
1113 if (io_ports
->ctl_addr
)
1114 hwif
->tp_ops
->set_irq(hwif
, 1);
1116 if (request_irq(hwif
->irq
,&ide_intr
,sa
,hwif
->name
,hwgroup
))
1120 if (!hwif
->rqsize
) {
1121 if ((hwif
->host_flags
& IDE_HFLAG_NO_LBA48
) ||
1122 (hwif
->host_flags
& IDE_HFLAG_NO_LBA48_DMA
))
1125 hwif
->rqsize
= 65536;
1128 #if !defined(__mc68000__)
1129 printk(KERN_INFO
"%s at 0x%03lx-0x%03lx,0x%03lx on irq %d", hwif
->name
,
1130 io_ports
->data_addr
, io_ports
->status_addr
,
1131 io_ports
->ctl_addr
, hwif
->irq
);
1133 printk(KERN_INFO
"%s at 0x%08lx on irq %d", hwif
->name
,
1134 io_ports
->data_addr
, hwif
->irq
);
1135 #endif /* __mc68000__ */
1137 printk(KERN_CONT
" (%sed with %s)",
1138 hwif
->sharing_irq
? "shar" : "serializ", match
->name
);
1139 printk(KERN_CONT
"\n");
1141 mutex_unlock(&ide_cfg_mtx
);
1144 ide_remove_port_from_hwgroup(hwif
);
1146 mutex_unlock(&ide_cfg_mtx
);
1150 static int ata_lock(dev_t dev
, void *data
)
1152 /* FIXME: we want to pin hwif down */
1156 static struct kobject
*ata_probe(dev_t dev
, int *part
, void *data
)
1158 ide_hwif_t
*hwif
= data
;
1159 int unit
= *part
>> PARTN_BITS
;
1160 ide_drive_t
*drive
= &hwif
->drives
[unit
];
1162 if ((drive
->dev_flags
& IDE_DFLAG_PRESENT
) == 0)
1165 if (drive
->media
== ide_disk
)
1166 request_module("ide-disk");
1167 if (drive
->dev_flags
& IDE_DFLAG_SCSI
)
1168 request_module("ide-scsi");
1169 if (drive
->media
== ide_cdrom
|| drive
->media
== ide_optical
)
1170 request_module("ide-cd");
1171 if (drive
->media
== ide_tape
)
1172 request_module("ide-tape");
1173 if (drive
->media
== ide_floppy
)
1174 request_module("ide-floppy");
1179 static struct kobject
*exact_match(dev_t dev
, int *part
, void *data
)
1181 struct gendisk
*p
= data
;
1182 *part
&= (1 << PARTN_BITS
) - 1;
1183 return &disk_to_dev(p
)->kobj
;
1186 static int exact_lock(dev_t dev
, void *data
)
1188 struct gendisk
*p
= data
;
1195 void ide_register_region(struct gendisk
*disk
)
1197 blk_register_region(MKDEV(disk
->major
, disk
->first_minor
),
1198 disk
->minors
, NULL
, exact_match
, exact_lock
, disk
);
1201 EXPORT_SYMBOL_GPL(ide_register_region
);
1203 void ide_unregister_region(struct gendisk
*disk
)
1205 blk_unregister_region(MKDEV(disk
->major
, disk
->first_minor
),
1209 EXPORT_SYMBOL_GPL(ide_unregister_region
);
1211 void ide_init_disk(struct gendisk
*disk
, ide_drive_t
*drive
)
1213 ide_hwif_t
*hwif
= drive
->hwif
;
1214 unsigned int unit
= (drive
->select
.all
>> 4) & 1;
1216 disk
->major
= hwif
->major
;
1217 disk
->first_minor
= unit
<< PARTN_BITS
;
1218 sprintf(disk
->disk_name
, "hd%c", 'a' + hwif
->index
* MAX_DRIVES
+ unit
);
1219 disk
->queue
= drive
->queue
;
1222 EXPORT_SYMBOL_GPL(ide_init_disk
);
1224 static void ide_remove_drive_from_hwgroup(ide_drive_t
*drive
)
1226 ide_hwgroup_t
*hwgroup
= drive
->hwif
->hwgroup
;
1228 if (drive
== drive
->next
) {
1229 /* special case: last drive from hwgroup. */
1230 BUG_ON(hwgroup
->drive
!= drive
);
1231 hwgroup
->drive
= NULL
;
1235 walk
= hwgroup
->drive
;
1236 while (walk
->next
!= drive
)
1238 walk
->next
= drive
->next
;
1239 if (hwgroup
->drive
== drive
) {
1240 hwgroup
->drive
= drive
->next
;
1241 hwgroup
->hwif
= hwgroup
->drive
->hwif
;
1244 BUG_ON(hwgroup
->drive
== drive
);
1247 static void drive_release_dev (struct device
*dev
)
1249 ide_drive_t
*drive
= container_of(dev
, ide_drive_t
, gendev
);
1251 ide_proc_unregister_device(drive
);
1253 spin_lock_irq(&ide_lock
);
1254 ide_remove_drive_from_hwgroup(drive
);
1257 drive
->dev_flags
&= ~IDE_DFLAG_PRESENT
;
1258 /* Messed up locking ... */
1259 spin_unlock_irq(&ide_lock
);
1260 blk_cleanup_queue(drive
->queue
);
1261 spin_lock_irq(&ide_lock
);
1262 drive
->queue
= NULL
;
1263 spin_unlock_irq(&ide_lock
);
1265 complete(&drive
->gendev_rel_comp
);
1268 static int hwif_init(ide_hwif_t
*hwif
)
1273 hwif
->irq
= __ide_default_irq(hwif
->io_ports
.data_addr
);
1275 printk(KERN_ERR
"%s: disabled, no IRQ\n", hwif
->name
);
1280 if (register_blkdev(hwif
->major
, hwif
->name
))
1283 if (!hwif
->sg_max_nents
)
1284 hwif
->sg_max_nents
= PRD_ENTRIES
;
1286 hwif
->sg_table
= kmalloc(sizeof(struct scatterlist
)*hwif
->sg_max_nents
,
1288 if (!hwif
->sg_table
) {
1289 printk(KERN_ERR
"%s: unable to allocate SG table.\n", hwif
->name
);
1293 sg_init_table(hwif
->sg_table
, hwif
->sg_max_nents
);
1295 if (init_irq(hwif
) == 0)
1298 old_irq
= hwif
->irq
;
1300 * It failed to initialise. Find the default IRQ for
1301 * this port and try that.
1303 hwif
->irq
= __ide_default_irq(hwif
->io_ports
.data_addr
);
1305 printk(KERN_ERR
"%s: disabled, unable to get IRQ %d\n",
1306 hwif
->name
, old_irq
);
1309 if (init_irq(hwif
)) {
1310 printk(KERN_ERR
"%s: probed IRQ %d and default IRQ %d failed\n",
1311 hwif
->name
, old_irq
, hwif
->irq
);
1314 printk(KERN_WARNING
"%s: probed IRQ %d failed, using default\n",
1315 hwif
->name
, hwif
->irq
);
1318 blk_register_region(MKDEV(hwif
->major
, 0), MAX_DRIVES
<< PARTN_BITS
,
1319 THIS_MODULE
, ata_probe
, ata_lock
, hwif
);
1323 unregister_blkdev(hwif
->major
, hwif
->name
);
1327 static void hwif_register_devices(ide_hwif_t
*hwif
)
1331 for (i
= 0; i
< MAX_DRIVES
; i
++) {
1332 ide_drive_t
*drive
= &hwif
->drives
[i
];
1333 struct device
*dev
= &drive
->gendev
;
1336 if ((drive
->dev_flags
& IDE_DFLAG_PRESENT
) == 0)
1339 snprintf(dev
->bus_id
, BUS_ID_SIZE
, "%u.%u", hwif
->index
, i
);
1340 dev
->parent
= &hwif
->gendev
;
1341 dev
->bus
= &ide_bus_type
;
1342 dev
->driver_data
= drive
;
1343 dev
->release
= drive_release_dev
;
1345 ret
= device_register(dev
);
1347 printk(KERN_WARNING
"IDE: %s: device_register error: "
1348 "%d\n", __func__
, ret
);
1352 static void ide_port_init_devices(ide_hwif_t
*hwif
)
1354 const struct ide_port_ops
*port_ops
= hwif
->port_ops
;
1357 for (i
= 0; i
< MAX_DRIVES
; i
++) {
1358 ide_drive_t
*drive
= &hwif
->drives
[i
];
1360 if (hwif
->host_flags
& IDE_HFLAG_IO_32BIT
)
1361 drive
->io_32bit
= 1;
1362 if (hwif
->host_flags
& IDE_HFLAG_UNMASK_IRQS
)
1363 drive
->dev_flags
|= IDE_DFLAG_UNMASK
;
1364 if (hwif
->host_flags
& IDE_HFLAG_NO_UNMASK_IRQS
)
1365 drive
->dev_flags
|= IDE_DFLAG_NO_UNMASK
;
1367 if (port_ops
&& port_ops
->init_dev
)
1368 port_ops
->init_dev(drive
);
1372 static void ide_init_port(ide_hwif_t
*hwif
, unsigned int port
,
1373 const struct ide_port_info
*d
)
1375 hwif
->channel
= port
;
1378 hwif
->chipset
= d
->chipset
;
1383 if ((!hwif
->irq
&& (d
->host_flags
& IDE_HFLAG_LEGACY_IRQS
)) ||
1384 (d
->host_flags
& IDE_HFLAG_FORCE_LEGACY_IRQS
))
1385 hwif
->irq
= port
? 15 : 14;
1387 /* ->host_flags may be set by ->init_iops (or even earlier...) */
1388 hwif
->host_flags
|= d
->host_flags
;
1389 hwif
->pio_mask
= d
->pio_mask
;
1392 hwif
->tp_ops
= d
->tp_ops
;
1394 /* ->set_pio_mode for DTC2278 is currently limited to port 0 */
1395 if (hwif
->chipset
!= ide_dtc2278
|| hwif
->channel
== 0)
1396 hwif
->port_ops
= d
->port_ops
;
1398 hwif
->swdma_mask
= d
->swdma_mask
;
1399 hwif
->mwdma_mask
= d
->mwdma_mask
;
1400 hwif
->ultra_mask
= d
->udma_mask
;
1402 if ((d
->host_flags
& IDE_HFLAG_NO_DMA
) == 0) {
1406 rc
= d
->init_dma(hwif
, d
);
1408 rc
= ide_hwif_setup_dma(hwif
, d
);
1411 printk(KERN_INFO
"%s: DMA disabled\n", hwif
->name
);
1413 hwif
->swdma_mask
= 0;
1414 hwif
->mwdma_mask
= 0;
1415 hwif
->ultra_mask
= 0;
1416 } else if (d
->dma_ops
)
1417 hwif
->dma_ops
= d
->dma_ops
;
1420 if ((d
->host_flags
& IDE_HFLAG_SERIALIZE
) ||
1421 ((d
->host_flags
& IDE_HFLAG_SERIALIZE_DMA
) && hwif
->dma_base
)) {
1423 hwif
->mate
->serialized
= hwif
->serialized
= 1;
1426 if (d
->host_flags
& IDE_HFLAG_RQSIZE_256
)
1429 /* call chipset specific routine for each enabled port */
1434 static void ide_port_cable_detect(ide_hwif_t
*hwif
)
1436 const struct ide_port_ops
*port_ops
= hwif
->port_ops
;
1438 if (port_ops
&& port_ops
->cable_detect
&& (hwif
->ultra_mask
& 0x78)) {
1439 if (hwif
->cbl
!= ATA_CBL_PATA40_SHORT
)
1440 hwif
->cbl
= port_ops
->cable_detect(hwif
);
1444 static ssize_t
store_delete_devices(struct device
*portdev
,
1445 struct device_attribute
*attr
,
1446 const char *buf
, size_t n
)
1448 ide_hwif_t
*hwif
= dev_get_drvdata(portdev
);
1450 if (strncmp(buf
, "1", n
))
1453 ide_port_unregister_devices(hwif
);
1458 static DEVICE_ATTR(delete_devices
, S_IWUSR
, NULL
, store_delete_devices
);
1460 static ssize_t
store_scan(struct device
*portdev
,
1461 struct device_attribute
*attr
,
1462 const char *buf
, size_t n
)
1464 ide_hwif_t
*hwif
= dev_get_drvdata(portdev
);
1466 if (strncmp(buf
, "1", n
))
1469 ide_port_unregister_devices(hwif
);
1470 ide_port_scan(hwif
);
1475 static DEVICE_ATTR(scan
, S_IWUSR
, NULL
, store_scan
);
1477 static struct device_attribute
*ide_port_attrs
[] = {
1478 &dev_attr_delete_devices
,
1483 static int ide_sysfs_register_port(ide_hwif_t
*hwif
)
1485 int i
, uninitialized_var(rc
);
1487 for (i
= 0; ide_port_attrs
[i
]; i
++) {
1488 rc
= device_create_file(hwif
->portdev
, ide_port_attrs
[i
]);
1496 static unsigned int ide_indexes
;
1499 * ide_find_port_slot - find free port slot
1502 * Return the new port slot index or -ENOENT if we are out of free slots.
1505 static int ide_find_port_slot(const struct ide_port_info
*d
)
1508 u8 bootable
= (d
&& (d
->host_flags
& IDE_HFLAG_NON_BOOTABLE
)) ? 0 : 1;
1509 u8 i
= (d
&& (d
->host_flags
& IDE_HFLAG_QD_2ND_PORT
)) ? 1 : 0;;
1512 * Claim an unassigned slot.
1514 * Give preference to claiming other slots before claiming ide0/ide1,
1515 * just in case there's another interface yet-to-be-scanned
1516 * which uses ports 0x1f0/0x170 (the ide0/ide1 defaults).
1518 * Unless there is a bootable card that does not use the standard
1519 * ports 0x1f0/0x170 (the ide0/ide1 defaults).
1521 mutex_lock(&ide_cfg_mtx
);
1523 if ((ide_indexes
| i
) != (1 << MAX_HWIFS
) - 1)
1524 idx
= ffz(ide_indexes
| i
);
1526 if ((ide_indexes
| 3) != (1 << MAX_HWIFS
) - 1)
1527 idx
= ffz(ide_indexes
| 3);
1528 else if ((ide_indexes
& 3) != 3)
1529 idx
= ffz(ide_indexes
);
1532 ide_indexes
|= (1 << idx
);
1533 mutex_unlock(&ide_cfg_mtx
);
1538 static void ide_free_port_slot(int idx
)
1540 mutex_lock(&ide_cfg_mtx
);
1541 ide_indexes
&= ~(1 << idx
);
1542 mutex_unlock(&ide_cfg_mtx
);
1545 struct ide_host
*ide_host_alloc_all(const struct ide_port_info
*d
,
1548 struct ide_host
*host
;
1551 host
= kzalloc(sizeof(*host
), GFP_KERNEL
);
1555 for (i
= 0; i
< MAX_HWIFS
; i
++) {
1562 hwif
= kzalloc(sizeof(*hwif
), GFP_KERNEL
);
1566 idx
= ide_find_port_slot(d
);
1568 printk(KERN_ERR
"%s: no free slot for interface\n",
1569 d
? d
->name
: "ide");
1574 ide_init_port_data(hwif
, idx
);
1578 host
->ports
[i
] = hwif
;
1582 if (host
->n_ports
== 0) {
1588 host
->dev
[0] = hws
[0]->dev
;
1591 host
->init_chipset
= d
->init_chipset
;
1592 host
->host_flags
= d
->host_flags
;
1597 EXPORT_SYMBOL_GPL(ide_host_alloc_all
);
1599 struct ide_host
*ide_host_alloc(const struct ide_port_info
*d
, hw_regs_t
**hws
)
1601 hw_regs_t
*hws_all
[MAX_HWIFS
];
1604 for (i
= 0; i
< MAX_HWIFS
; i
++)
1605 hws_all
[i
] = (i
< 4) ? hws
[i
] : NULL
;
1607 return ide_host_alloc_all(d
, hws_all
);
1609 EXPORT_SYMBOL_GPL(ide_host_alloc
);
1611 int ide_host_register(struct ide_host
*host
, const struct ide_port_info
*d
,
1614 ide_hwif_t
*hwif
, *mate
= NULL
;
1617 for (i
= 0; i
< MAX_HWIFS
; i
++) {
1618 hwif
= host
->ports
[i
];
1625 ide_init_port_hw(hwif
, hws
[i
]);
1626 ide_port_apply_params(hwif
);
1633 if ((i
& 1) && mate
) {
1638 mate
= (i
& 1) ? NULL
: hwif
;
1640 ide_init_port(hwif
, i
& 1, d
);
1641 ide_port_cable_detect(hwif
);
1642 ide_port_init_devices(hwif
);
1645 for (i
= 0; i
< MAX_HWIFS
; i
++) {
1646 hwif
= host
->ports
[i
];
1651 if (ide_probe_port(hwif
) == 0)
1654 if (hwif
->chipset
!= ide_4drives
|| !hwif
->mate
||
1655 !hwif
->mate
->present
)
1656 ide_register_port(hwif
);
1659 ide_port_tune_devices(hwif
);
1662 for (i
= 0; i
< MAX_HWIFS
; i
++) {
1663 hwif
= host
->ports
[i
];
1668 if (hwif_init(hwif
) == 0) {
1669 printk(KERN_INFO
"%s: failed to initialize IDE "
1670 "interface\n", hwif
->name
);
1678 ide_port_setup_devices(hwif
);
1680 ide_acpi_init(hwif
);
1683 ide_acpi_port_init_devices(hwif
);
1686 for (i
= 0; i
< MAX_HWIFS
; i
++) {
1687 hwif
= host
->ports
[i
];
1692 if (hwif
->chipset
== ide_unknown
)
1693 hwif
->chipset
= ide_generic
;
1696 hwif_register_devices(hwif
);
1699 for (i
= 0; i
< MAX_HWIFS
; i
++) {
1700 hwif
= host
->ports
[i
];
1705 ide_sysfs_register_port(hwif
);
1706 ide_proc_register_port(hwif
);
1709 ide_proc_port_register_devices(hwif
);
1714 EXPORT_SYMBOL_GPL(ide_host_register
);
1716 int ide_host_add(const struct ide_port_info
*d
, hw_regs_t
**hws
,
1717 struct ide_host
**hostp
)
1719 struct ide_host
*host
;
1722 host
= ide_host_alloc(d
, hws
);
1726 rc
= ide_host_register(host
, d
, hws
);
1728 ide_host_free(host
);
1737 EXPORT_SYMBOL_GPL(ide_host_add
);
1739 void ide_host_free(struct ide_host
*host
)
1744 for (i
= 0; i
< MAX_HWIFS
; i
++) {
1745 hwif
= host
->ports
[i
];
1750 ide_free_port_slot(hwif
->index
);
1756 EXPORT_SYMBOL_GPL(ide_host_free
);
1758 void ide_host_remove(struct ide_host
*host
)
1762 for (i
= 0; i
< MAX_HWIFS
; i
++) {
1764 ide_unregister(host
->ports
[i
]);
1767 ide_host_free(host
);
1769 EXPORT_SYMBOL_GPL(ide_host_remove
);
1771 void ide_port_scan(ide_hwif_t
*hwif
)
1773 ide_port_apply_params(hwif
);
1774 ide_port_cable_detect(hwif
);
1775 ide_port_init_devices(hwif
);
1777 if (ide_probe_port(hwif
) < 0)
1782 ide_port_tune_devices(hwif
);
1783 ide_acpi_port_init_devices(hwif
);
1784 ide_port_setup_devices(hwif
);
1785 hwif_register_devices(hwif
);
1786 ide_proc_port_register_devices(hwif
);
1788 EXPORT_SYMBOL_GPL(ide_port_scan
);
1790 static void ide_legacy_init_one(hw_regs_t
**hws
, hw_regs_t
*hw
,
1791 u8 port_no
, const struct ide_port_info
*d
,
1792 unsigned long config
)
1794 unsigned long base
, ctl
;
1807 if (!request_region(base
, 8, d
->name
)) {
1808 printk(KERN_ERR
"%s: I/O resource 0x%lX-0x%lX not free.\n",
1809 d
->name
, base
, base
+ 7);
1813 if (!request_region(ctl
, 1, d
->name
)) {
1814 printk(KERN_ERR
"%s: I/O resource 0x%lX not free.\n",
1816 release_region(base
, 8);
1820 ide_std_init_ports(hw
, base
, ctl
);
1822 hw
->chipset
= d
->chipset
;
1823 hw
->config
= config
;
1828 int ide_legacy_device_add(const struct ide_port_info
*d
, unsigned long config
)
1830 hw_regs_t hw
[2], *hws
[] = { NULL
, NULL
, NULL
, NULL
};
1832 memset(&hw
, 0, sizeof(hw
));
1834 if ((d
->host_flags
& IDE_HFLAG_QD_2ND_PORT
) == 0)
1835 ide_legacy_init_one(hws
, &hw
[0], 0, d
, config
);
1836 ide_legacy_init_one(hws
, &hw
[1], 1, d
, config
);
1838 if (hws
[0] == NULL
&& hws
[1] == NULL
&&
1839 (d
->host_flags
& IDE_HFLAG_SINGLE
))
1842 return ide_host_add(d
, hws
, NULL
);
1844 EXPORT_SYMBOL_GPL(ide_legacy_device_add
);