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
)
53 drive
->id
->cyls
= drive
->cyl
;
54 drive
->id
->heads
= drive
->head
;
55 drive
->id
->sectors
= drive
->sect
;
56 drive
->id
->cur_cyls
= drive
->cyl
;
57 drive
->id
->cur_heads
= drive
->head
;
58 drive
->id
->cur_sectors
= drive
->sect
;
61 static void ide_disk_init_chs(ide_drive_t
*drive
)
63 struct hd_driveid
*id
= drive
->id
;
65 /* Extract geometry if we did not already have one for the drive */
66 if (!drive
->cyl
|| !drive
->head
|| !drive
->sect
) {
67 drive
->cyl
= drive
->bios_cyl
= id
->cyls
;
68 drive
->head
= drive
->bios_head
= id
->heads
;
69 drive
->sect
= drive
->bios_sect
= id
->sectors
;
72 /* Handle logical geometry translation by the drive */
73 if ((id
->field_valid
& 1) && id
->cur_cyls
&&
74 id
->cur_heads
&& (id
->cur_heads
<= 16) && id
->cur_sectors
) {
75 drive
->cyl
= id
->cur_cyls
;
76 drive
->head
= id
->cur_heads
;
77 drive
->sect
= id
->cur_sectors
;
80 /* Use physical geometry if what we have still makes no sense */
81 if (drive
->head
> 16 && id
->heads
&& id
->heads
<= 16) {
82 drive
->cyl
= id
->cyls
;
83 drive
->head
= id
->heads
;
84 drive
->sect
= id
->sectors
;
88 static void ide_disk_init_mult_count(ide_drive_t
*drive
)
90 struct hd_driveid
*id
= drive
->id
;
92 drive
->mult_count
= 0;
93 if (id
->max_multsect
) {
94 #ifdef CONFIG_IDEDISK_MULTI_MODE
95 id
->multsect
= ((id
->max_multsect
/2) > 1) ? id
->max_multsect
: 0;
96 id
->multsect_valid
= id
->multsect
? 1 : 0;
97 drive
->mult_req
= id
->multsect_valid
? id
->max_multsect
: 0;
98 drive
->special
.b
.set_multmode
= drive
->mult_req
? 1 : 0;
99 #else /* original, pre IDE-NFG, per request of AC */
101 if (drive
->mult_req
> id
->max_multsect
)
102 drive
->mult_req
= id
->max_multsect
;
103 if (drive
->mult_req
|| ((id
->multsect_valid
& 1) && id
->multsect
))
104 drive
->special
.b
.set_multmode
= 1;
110 * do_identify - identify a drive
111 * @drive: drive to identify
114 * Called when we have issued a drive identify command to
115 * read and parse the results. This function is run with
116 * interrupts disabled.
119 static inline void do_identify (ide_drive_t
*drive
, u8 cmd
)
121 ide_hwif_t
*hwif
= HWIF(drive
);
123 struct hd_driveid
*id
;
126 /* read 512 bytes of id info */
127 hwif
->tp_ops
->input_data(drive
, NULL
, id
, SECTOR_SIZE
);
132 printk(KERN_INFO
"%s: dumping identify data\n", drive
->name
);
133 ide_dump_identify((u8
*)id
);
137 #if defined (CONFIG_SCSI_EATA_PIO) || defined (CONFIG_SCSI_EATA)
139 * EATA SCSI controllers do a hardware ATA emulation:
140 * Ignore them if there is a driver for them available.
142 if ((id
->model
[0] == 'P' && id
->model
[1] == 'M') ||
143 (id
->model
[0] == 'S' && id
->model
[1] == 'K')) {
144 printk("%s: EATA SCSI HBA %.10s\n", drive
->name
, id
->model
);
147 #endif /* CONFIG_SCSI_EATA || CONFIG_SCSI_EATA_PIO */
150 * WIN_IDENTIFY returns little-endian info,
151 * WIN_PIDENTIFY *usually* returns little-endian info.
153 if (cmd
== WIN_PIDENTIFY
) {
154 if ((id
->model
[0] == 'N' && id
->model
[1] == 'E') /* NEC */
155 || (id
->model
[0] == 'F' && id
->model
[1] == 'X') /* Mitsumi */
156 || (id
->model
[0] == 'P' && id
->model
[1] == 'i'))/* Pioneer */
157 /* Vertos drives may still be weird */
160 ide_fixstring(id
->model
, sizeof(id
->model
), bswap
);
161 ide_fixstring(id
->fw_rev
, sizeof(id
->fw_rev
), bswap
);
162 ide_fixstring(id
->serial_no
, sizeof(id
->serial_no
), bswap
);
164 /* we depend on this a lot! */
165 id
->model
[sizeof(id
->model
)-1] = '\0';
167 if (strstr(id
->model
, "E X A B Y T E N E S T"))
170 printk("%s: %s, ", drive
->name
, id
->model
);
175 * Check for an ATAPI device
177 if (cmd
== WIN_PIDENTIFY
) {
178 u8 type
= (id
->config
>> 8) & 0x1f;
182 if (!strstr(id
->model
, "CD-ROM")) {
183 if (!strstr(id
->model
, "oppy") &&
184 !strstr(id
->model
, "poyp") &&
185 !strstr(id
->model
, "ZIP"))
186 printk("cdrom or floppy?, assuming ");
187 if (drive
->media
!= ide_cdrom
) {
189 drive
->removable
= 1;
193 /* Early cdrom models used zero */
196 drive
->removable
= 1;
198 /* kludge for Apple PowerBook internal zip */
199 if (!strstr(id
->model
, "CD-ROM") &&
200 strstr(id
->model
, "ZIP")) {
206 printk ("CD/DVD-ROM");
213 drive
->removable
= 1;
216 printk("UNKNOWN (type %d)", type
);
221 /* an ATAPI device ignores DRDY */
222 drive
->ready_stat
= 0;
227 * Not an ATAPI device: looks like a "regular" hard disk
231 * 0x848a = CompactFlash device
232 * These are *not* removable in Linux definition of the term
235 if ((id
->config
!= 0x848a) && (id
->config
& (1<<7)))
236 drive
->removable
= 1;
238 drive
->media
= ide_disk
;
239 printk("%s DISK drive\n", (id
->config
== 0x848a) ? "CFA" : "ATA" );
250 * actual_try_to_identify - send ata/atapi identify
251 * @drive: drive to identify
252 * @cmd: command to use
254 * try_to_identify() sends an ATA(PI) IDENTIFY request to a drive
255 * and waits for a response. It also monitors irqs while this is
256 * happening, in hope of automatically determining which one is
257 * being used by the interface.
259 * Returns: 0 device was identified
260 * 1 device timed-out (no response to identify request)
261 * 2 device aborted the command (refused to identify itself)
264 static int actual_try_to_identify (ide_drive_t
*drive
, u8 cmd
)
266 ide_hwif_t
*hwif
= HWIF(drive
);
267 struct ide_io_ports
*io_ports
= &hwif
->io_ports
;
268 const struct ide_tp_ops
*tp_ops
= hwif
->tp_ops
;
269 int use_altstatus
= 0, rc
;
270 unsigned long timeout
;
273 /* take a deep breath */
276 if (io_ports
->ctl_addr
) {
277 a
= tp_ops
->read_altstatus(hwif
);
278 s
= tp_ops
->read_status(hwif
);
279 if ((a
^ s
) & ~INDEX_STAT
)
280 /* ancient Seagate drives, broken interfaces */
281 printk(KERN_INFO
"%s: probing with STATUS(0x%02x) "
282 "instead of ALTSTATUS(0x%02x)\n",
285 /* use non-intrusive polling */
289 /* set features register for atapi
290 * identify command to be sure of reply
292 if (cmd
== WIN_PIDENTIFY
) {
295 memset(&task
, 0, sizeof(task
));
296 /* disable DMA & overlap */
297 task
.tf_flags
= IDE_TFLAG_OUT_FEATURE
;
299 tp_ops
->tf_load(drive
, &task
);
302 /* ask drive for ID */
303 tp_ops
->exec_command(hwif
, cmd
);
305 timeout
= ((cmd
== WIN_IDENTIFY
) ? WAIT_WORSTCASE
: WAIT_PIDENTIFY
) / 2;
308 if (time_after(jiffies
, timeout
)) {
309 /* drive timed-out */
312 /* give drive a breather */
314 s
= use_altstatus
? tp_ops
->read_altstatus(hwif
)
315 : tp_ops
->read_status(hwif
);
316 } while (s
& BUSY_STAT
);
318 /* wait for IRQ and DRQ_STAT */
320 s
= tp_ops
->read_status(hwif
);
322 if (OK_STAT(s
, DRQ_STAT
, BAD_R_STAT
)) {
325 /* local CPU only; some systems need this */
326 local_irq_save(flags
);
327 /* drive returned ID */
328 do_identify(drive
, cmd
);
329 /* drive responded with ID */
331 /* clear drive IRQ */
332 (void)tp_ops
->read_status(hwif
);
333 local_irq_restore(flags
);
335 /* drive refused ID */
342 * try_to_identify - try to identify a drive
343 * @drive: drive to probe
344 * @cmd: command to use
346 * Issue the identify command and then do IRQ probing to
347 * complete the identification when needed by finding the
348 * IRQ the drive is attached to
351 static int try_to_identify (ide_drive_t
*drive
, u8 cmd
)
353 ide_hwif_t
*hwif
= HWIF(drive
);
354 const struct ide_tp_ops
*tp_ops
= hwif
->tp_ops
;
357 unsigned long cookie
= 0;
360 * Disable device irq unless we need to
361 * probe for it. Otherwise we'll get spurious
362 * interrupts during the identify-phase that
363 * the irq handler isn't expecting.
365 if (hwif
->io_ports
.ctl_addr
) {
368 cookie
= probe_irq_on();
370 tp_ops
->set_irq(hwif
, autoprobe
);
373 retval
= actual_try_to_identify(drive
, cmd
);
378 tp_ops
->set_irq(hwif
, 0);
379 /* clear drive IRQ */
380 (void)tp_ops
->read_status(hwif
);
382 irq
= probe_irq_off(cookie
);
387 /* Mmmm.. multiple IRQs..
388 * don't know which was ours
390 printk("%s: IRQ probe failed (0x%lx)\n",
391 drive
->name
, cookie
);
398 static int ide_busy_sleep(ide_hwif_t
*hwif
)
400 unsigned long timeout
= jiffies
+ WAIT_WORSTCASE
;
405 stat
= hwif
->tp_ops
->read_status(hwif
);
406 if ((stat
& BUSY_STAT
) == 0)
408 } while (time_before(jiffies
, timeout
));
413 static u8
ide_read_device(ide_drive_t
*drive
)
417 memset(&task
, 0, sizeof(task
));
418 task
.tf_flags
= IDE_TFLAG_IN_DEVICE
;
420 drive
->hwif
->tp_ops
->tf_read(drive
, &task
);
422 return task
.tf
.device
;
426 * do_probe - probe an IDE device
427 * @drive: drive to probe
428 * @cmd: command to use
430 * do_probe() has the difficult job of finding a drive if it exists,
431 * without getting hung up if it doesn't exist, without trampling on
432 * ethernet cards, and without leaving any IRQs dangling to haunt us later.
434 * If a drive is "known" to exist (from CMOS or kernel parameters),
435 * but does not respond right away, the probe will "hang in there"
436 * for the maximum wait time (about 30 seconds), otherwise it will
437 * exit much more quickly.
439 * Returns: 0 device was identified
440 * 1 device timed-out (no response to identify request)
441 * 2 device aborted the command (refused to identify itself)
442 * 3 bad status from device (possible for ATAPI drives)
443 * 4 probe was not attempted because failure was obvious
446 static int do_probe (ide_drive_t
*drive
, u8 cmd
)
448 ide_hwif_t
*hwif
= HWIF(drive
);
449 const struct ide_tp_ops
*tp_ops
= hwif
->tp_ops
;
453 if (drive
->present
) {
454 /* avoid waiting for inappropriate probes */
455 if ((drive
->media
!= ide_disk
) && (cmd
== WIN_IDENTIFY
))
459 printk("probing for %s: present=%d, media=%d, probetype=%s\n",
460 drive
->name
, drive
->present
, drive
->media
,
461 (cmd
== WIN_IDENTIFY
) ? "ATA" : "ATAPI");
464 /* needed for some systems
465 * (e.g. crw9624 as drive0 with disk as slave)
471 if (ide_read_device(drive
) != drive
->select
.all
&& !drive
->present
) {
472 if (drive
->select
.b
.unit
!= 0) {
473 /* exit with drive0 selected */
474 SELECT_DRIVE(&hwif
->drives
[0]);
475 /* allow BUSY_STAT to assert & clear */
478 /* no i/f present: mmm.. this should be a 4 -ml */
482 stat
= tp_ops
->read_status(hwif
);
484 if (OK_STAT(stat
, READY_STAT
, BUSY_STAT
) ||
485 drive
->present
|| cmd
== WIN_PIDENTIFY
) {
486 /* send cmd and wait */
487 if ((rc
= try_to_identify(drive
, cmd
))) {
488 /* failed: try again */
489 rc
= try_to_identify(drive
,cmd
);
492 stat
= tp_ops
->read_status(hwif
);
494 if (stat
== (BUSY_STAT
| READY_STAT
))
497 if (rc
== 1 && cmd
== WIN_PIDENTIFY
) {
498 printk(KERN_ERR
"%s: no response (status = 0x%02x), "
499 "resetting drive\n", drive
->name
, stat
);
503 tp_ops
->exec_command(hwif
, WIN_SRST
);
504 (void)ide_busy_sleep(hwif
);
505 rc
= try_to_identify(drive
, cmd
);
508 /* ensure drive IRQ is clear */
509 stat
= tp_ops
->read_status(hwif
);
512 printk(KERN_ERR
"%s: no response (status = 0x%02x)\n",
515 /* not present or maybe ATAPI */
518 if (drive
->select
.b
.unit
!= 0) {
519 /* exit with drive0 selected */
520 SELECT_DRIVE(&hwif
->drives
[0]);
522 /* ensure drive irq is clear */
523 (void)tp_ops
->read_status(hwif
);
531 static void enable_nest (ide_drive_t
*drive
)
533 ide_hwif_t
*hwif
= HWIF(drive
);
534 const struct ide_tp_ops
*tp_ops
= hwif
->tp_ops
;
537 printk("%s: enabling %s -- ", hwif
->name
, drive
->id
->model
);
540 tp_ops
->exec_command(hwif
, EXABYTE_ENABLE_NEST
);
542 if (ide_busy_sleep(hwif
)) {
543 printk(KERN_CONT
"failed (timeout)\n");
549 stat
= tp_ops
->read_status(hwif
);
551 if (!OK_STAT(stat
, 0, BAD_STAT
))
552 printk(KERN_CONT
"failed (status = 0x%02x)\n", stat
);
554 printk(KERN_CONT
"success\n");
556 /* if !(success||timed-out) */
557 if (do_probe(drive
, WIN_IDENTIFY
) >= 2) {
558 /* look for ATAPI device */
559 (void) do_probe(drive
, WIN_PIDENTIFY
);
564 * probe_for_drives - upper level drive probe
565 * @drive: drive to probe for
567 * probe_for_drive() tests for existence of a given drive using do_probe()
568 * and presents things to the user as needed.
570 * Returns: 0 no device was found
571 * 1 device was found (note: drive->present might
575 static inline u8
probe_for_drive (ide_drive_t
*drive
)
578 * In order to keep things simple we have an id
579 * block for all drives at all times. If the device
580 * is pre ATA or refuses ATA/ATAPI identify we
581 * will add faked data to this.
583 * Also note that 0 everywhere means "can't do X"
586 drive
->id
= kzalloc(SECTOR_WORDS
*4, GFP_KERNEL
);
588 if(drive
->id
== NULL
)
590 printk(KERN_ERR
"ide: out of memory for id data.\n");
593 strcpy(drive
->id
->model
, "UNKNOWN");
598 /* if !(success||timed-out) */
599 if (do_probe(drive
, WIN_IDENTIFY
) >= 2) {
600 /* look for ATAPI device */
601 (void) do_probe(drive
, WIN_PIDENTIFY
);
604 /* drive not found */
606 if (strstr(drive
->id
->model
, "E X A B Y T E N E S T"))
609 /* identification failed? */
610 if (!drive
->id_read
) {
611 if (drive
->media
== ide_disk
) {
612 printk(KERN_INFO
"%s: non-IDE drive, CHS=%d/%d/%d\n",
613 drive
->name
, drive
->cyl
,
614 drive
->head
, drive
->sect
);
615 } else if (drive
->media
== ide_cdrom
) {
616 printk(KERN_INFO
"%s: ATAPI cdrom (?)\n", drive
->name
);
619 printk(KERN_WARNING
"%s: Unknown device on bus refused identification. Ignoring.\n", drive
->name
);
623 /* drive was found */
627 /* The drive wasn't being helpful. Add generic info only */
628 if (drive
->id_read
== 0) {
633 if (drive
->media
== ide_disk
) {
634 ide_disk_init_chs(drive
);
635 ide_disk_init_mult_count(drive
);
638 return drive
->present
;
641 static void hwif_release_dev(struct device
*dev
)
643 ide_hwif_t
*hwif
= container_of(dev
, ide_hwif_t
, gendev
);
645 complete(&hwif
->gendev_rel_comp
);
648 static int ide_register_port(ide_hwif_t
*hwif
)
652 /* register with global device tree */
653 strlcpy(hwif
->gendev
.bus_id
,hwif
->name
,BUS_ID_SIZE
);
654 hwif
->gendev
.driver_data
= hwif
;
655 if (hwif
->gendev
.parent
== NULL
) {
657 hwif
->gendev
.parent
= hwif
->dev
;
659 /* Would like to do = &device_legacy */
660 hwif
->gendev
.parent
= NULL
;
662 hwif
->gendev
.release
= hwif_release_dev
;
663 ret
= device_register(&hwif
->gendev
);
665 printk(KERN_WARNING
"IDE: %s: device_register error: %d\n",
670 hwif
->portdev
= device_create_drvdata(ide_port_class
, &hwif
->gendev
,
671 MKDEV(0, 0), hwif
, hwif
->name
);
672 if (IS_ERR(hwif
->portdev
)) {
673 ret
= PTR_ERR(hwif
->portdev
);
674 device_unregister(&hwif
->gendev
);
681 * ide_port_wait_ready - wait for port to become ready
684 * This is needed on some PPCs and a bunch of BIOS-less embedded
685 * platforms. Typical cases are:
687 * - The firmware hard reset the disk before booting the kernel,
688 * the drive is still doing it's poweron-reset sequence, that
689 * can take up to 30 seconds.
691 * - The firmware does nothing (or no firmware), the device is
692 * still in POST state (same as above actually).
694 * - Some CD/DVD/Writer combo drives tend to drive the bus during
695 * their reset sequence even when they are non-selected slave
696 * devices, thus preventing discovery of the main HD.
698 * Doing this wait-for-non-busy should not harm any existing
699 * configuration and fix some issues like the above.
703 * Returns 0 on success, error code (< 0) otherwise.
706 static int ide_port_wait_ready(ide_hwif_t
*hwif
)
710 printk(KERN_DEBUG
"Probing IDE interface %s...\n", hwif
->name
);
712 /* Let HW settle down a bit from whatever init state we
716 /* Wait for BSY bit to go away, spec timeout is 30 seconds,
717 * I know of at least one disk who takes 31 seconds, I use 35
720 rc
= ide_wait_not_busy(hwif
, 35000);
724 /* Now make sure both master & slave are ready */
725 for (unit
= 0; unit
< MAX_DRIVES
; unit
++) {
726 ide_drive_t
*drive
= &hwif
->drives
[unit
];
728 /* Ignore disks that we will not probe for later. */
729 if (!drive
->noprobe
|| drive
->present
) {
731 hwif
->tp_ops
->set_irq(hwif
, 1);
733 rc
= ide_wait_not_busy(hwif
, 35000);
737 printk(KERN_DEBUG
"%s: ide_wait_not_busy() skipped\n",
741 /* Exit function with master reselected (let's be sane) */
743 SELECT_DRIVE(&hwif
->drives
[0]);
749 * ide_undecoded_slave - look for bad CF adapters
752 * Analyse the drives on the interface and attempt to decide if we
753 * have the same drive viewed twice. This occurs with crap CF adapters
754 * and PCMCIA sometimes.
757 void ide_undecoded_slave(ide_drive_t
*drive1
)
759 ide_drive_t
*drive0
= &drive1
->hwif
->drives
[0];
761 if ((drive1
->dn
& 1) == 0 || drive0
->present
== 0)
764 /* If the models don't match they are not the same product */
765 if (strcmp(drive0
->id
->model
, drive1
->id
->model
))
768 /* Serial numbers do not match */
769 if (strncmp(drive0
->id
->serial_no
, drive1
->id
->serial_no
, 20))
772 /* No serial number, thankfully very rare for CF */
773 if (drive0
->id
->serial_no
[0] == 0)
776 /* Appears to be an IDE flash adapter with decode bugs */
777 printk(KERN_WARNING
"ide-probe: ignoring undecoded slave\n");
782 EXPORT_SYMBOL_GPL(ide_undecoded_slave
);
784 static int ide_probe_port(ide_hwif_t
*hwif
)
788 int unit
, rc
= -ENODEV
;
790 BUG_ON(hwif
->present
);
792 if (hwif
->drives
[0].noprobe
&& hwif
->drives
[1].noprobe
)
796 * We must always disable IRQ, as probe_for_drive will assert IRQ, but
797 * we'll install our IRQ driver much later...
801 disable_irq(hwif
->irq
);
803 local_irq_set(flags
);
805 if (ide_port_wait_ready(hwif
) == -EBUSY
)
806 printk(KERN_DEBUG
"%s: Wait for ready failed before probe !\n", hwif
->name
);
809 * Second drive should only exist if first drive was found,
810 * but a lot of cdrom drives are configured as single slaves.
812 for (unit
= 0; unit
< MAX_DRIVES
; ++unit
) {
813 ide_drive_t
*drive
= &hwif
->drives
[unit
];
814 drive
->dn
= (hwif
->channel
? 2 : 0) + unit
;
815 (void) probe_for_drive(drive
);
820 local_irq_restore(flags
);
823 * Use cached IRQ number. It might be (and is...) changed by probe
832 static void ide_port_tune_devices(ide_hwif_t
*hwif
)
834 const struct ide_port_ops
*port_ops
= hwif
->port_ops
;
837 for (unit
= 0; unit
< MAX_DRIVES
; unit
++) {
838 ide_drive_t
*drive
= &hwif
->drives
[unit
];
840 if (drive
->present
&& port_ops
&& port_ops
->quirkproc
)
841 port_ops
->quirkproc(drive
);
844 for (unit
= 0; unit
< MAX_DRIVES
; ++unit
) {
845 ide_drive_t
*drive
= &hwif
->drives
[unit
];
847 if (drive
->present
) {
848 ide_set_max_pio(drive
);
857 for (unit
= 0; unit
< MAX_DRIVES
; ++unit
) {
858 ide_drive_t
*drive
= &hwif
->drives
[unit
];
860 if (hwif
->host_flags
& IDE_HFLAG_NO_IO_32BIT
)
861 drive
->no_io_32bit
= 1;
863 drive
->no_io_32bit
= drive
->id
->dword_io
? 1 : 0;
869 * save_match() is used to simplify logic in init_irq() below.
871 * A loophole here is that we may not know about a particular
872 * hwif's irq until after that hwif is actually probed/initialized..
873 * This could be a problem for the case where an hwif is on a
874 * dual interface that requires serialization (eg. cmd640) and another
875 * hwif using one of the same irqs is initialized beforehand.
877 * This routine detects and reports such situations, but does not fix them.
879 static void save_match(ide_hwif_t
*hwif
, ide_hwif_t
*new, ide_hwif_t
**match
)
881 ide_hwif_t
*m
= *match
;
883 if (m
&& m
->hwgroup
&& m
->hwgroup
!= new->hwgroup
) {
886 printk("%s: potential irq problem with %s and %s\n",
887 hwif
->name
, new->name
, m
->name
);
889 if (!m
|| m
->irq
!= hwif
->irq
) /* don't undo a prior perfect match */
892 #endif /* MAX_HWIFS > 1 */
897 static int ide_init_queue(ide_drive_t
*drive
)
899 struct request_queue
*q
;
900 ide_hwif_t
*hwif
= HWIF(drive
);
901 int max_sectors
= 256;
902 int max_sg_entries
= PRD_ENTRIES
;
905 * Our default set up assumes the normal IDE case,
906 * that is 64K segmenting, standard PRD setup
907 * and LBA28. Some drivers then impose their own
908 * limits and LBA48 we could raise it but as yet
912 q
= blk_init_queue_node(do_ide_request
, &ide_lock
, hwif_to_node(hwif
));
916 q
->queuedata
= drive
;
917 blk_queue_segment_boundary(q
, 0xffff);
919 if (hwif
->rqsize
< max_sectors
)
920 max_sectors
= hwif
->rqsize
;
921 blk_queue_max_sectors(q
, max_sectors
);
924 /* When we have an IOMMU, we may have a problem where pci_map_sg()
925 * creates segments that don't completely match our boundary
926 * requirements and thus need to be broken up again. Because it
927 * doesn't align properly either, we may actually have to break up
928 * to more segments than what was we got in the first place, a max
929 * worst case is twice as many.
930 * This will be fixed once we teach pci_map_sg() about our boundary
931 * requirements, hopefully soon. *FIXME*
933 if (!PCI_DMA_BUS_IS_PHYS
)
934 max_sg_entries
>>= 1;
935 #endif /* CONFIG_PCI */
937 blk_queue_max_hw_segments(q
, max_sg_entries
);
938 blk_queue_max_phys_segments(q
, max_sg_entries
);
940 /* assign drive queue */
943 /* needs drive->queue to be set */
944 ide_toggle_bounce(drive
, 1);
949 static void ide_add_drive_to_hwgroup(ide_drive_t
*drive
)
951 ide_hwgroup_t
*hwgroup
= drive
->hwif
->hwgroup
;
953 spin_lock_irq(&ide_lock
);
954 if (!hwgroup
->drive
) {
955 /* first drive for hwgroup. */
957 hwgroup
->drive
= drive
;
958 hwgroup
->hwif
= HWIF(hwgroup
->drive
);
960 drive
->next
= hwgroup
->drive
->next
;
961 hwgroup
->drive
->next
= drive
;
963 spin_unlock_irq(&ide_lock
);
967 * For any present drive:
968 * - allocate the block device queue
969 * - link drive into the hwgroup
971 static void ide_port_setup_devices(ide_hwif_t
*hwif
)
975 mutex_lock(&ide_cfg_mtx
);
976 for (i
= 0; i
< MAX_DRIVES
; i
++) {
977 ide_drive_t
*drive
= &hwif
->drives
[i
];
982 if (ide_init_queue(drive
)) {
983 printk(KERN_ERR
"ide: failed to init %s\n",
988 ide_add_drive_to_hwgroup(drive
);
990 mutex_unlock(&ide_cfg_mtx
);
993 static ide_hwif_t
*ide_ports
[MAX_HWIFS
];
995 void ide_remove_port_from_hwgroup(ide_hwif_t
*hwif
)
997 ide_hwgroup_t
*hwgroup
= hwif
->hwgroup
;
999 ide_ports
[hwif
->index
] = NULL
;
1001 spin_lock_irq(&ide_lock
);
1003 * Remove us from the hwgroup, and free
1004 * the hwgroup if we were the only member
1006 if (hwif
->next
== hwif
) {
1007 BUG_ON(hwgroup
->hwif
!= hwif
);
1010 /* There is another interface in hwgroup.
1011 * Unlink us, and set hwgroup->drive and ->hwif to
1014 ide_hwif_t
*g
= hwgroup
->hwif
;
1016 while (g
->next
!= hwif
)
1018 g
->next
= hwif
->next
;
1019 if (hwgroup
->hwif
== hwif
) {
1020 /* Chose a random hwif for hwgroup->hwif.
1021 * It's guaranteed that there are no drives
1022 * left in the hwgroup.
1024 BUG_ON(hwgroup
->drive
!= NULL
);
1027 BUG_ON(hwgroup
->hwif
== hwif
);
1029 spin_unlock_irq(&ide_lock
);
1033 * This routine sets up the irq for an ide interface, and creates a new
1034 * hwgroup for the irq/hwif if none was previously assigned.
1036 * Much of the code is for correctly detecting/handling irq sharing
1037 * and irq serialization situations. This is somewhat complex because
1038 * it handles static as well as dynamic (PCMCIA) IDE interfaces.
1040 static int init_irq (ide_hwif_t
*hwif
)
1042 struct ide_io_ports
*io_ports
= &hwif
->io_ports
;
1044 ide_hwgroup_t
*hwgroup
;
1045 ide_hwif_t
*match
= NULL
;
1048 BUG_ON(in_interrupt());
1049 BUG_ON(irqs_disabled());
1050 BUG_ON(hwif
== NULL
);
1052 mutex_lock(&ide_cfg_mtx
);
1053 hwif
->hwgroup
= NULL
;
1056 * Group up with any other hwifs that share our irq(s).
1058 for (index
= 0; index
< MAX_HWIFS
; index
++) {
1059 ide_hwif_t
*h
= ide_ports
[index
];
1061 if (h
&& h
->hwgroup
) { /* scan only initialized ports */
1062 if (hwif
->irq
== h
->irq
) {
1063 hwif
->sharing_irq
= h
->sharing_irq
= 1;
1064 if (hwif
->chipset
!= ide_pci
||
1065 h
->chipset
!= ide_pci
) {
1066 save_match(hwif
, h
, &match
);
1069 if (hwif
->serialized
) {
1070 if (hwif
->mate
&& hwif
->mate
->irq
== h
->irq
)
1071 save_match(hwif
, h
, &match
);
1073 if (h
->serialized
) {
1074 if (h
->mate
&& hwif
->irq
== h
->mate
->irq
)
1075 save_match(hwif
, h
, &match
);
1079 #endif /* MAX_HWIFS > 1 */
1081 * If we are still without a hwgroup, then form a new one
1084 hwgroup
= match
->hwgroup
;
1085 hwif
->hwgroup
= hwgroup
;
1087 * Link us into the hwgroup.
1088 * This must be done early, do ensure that unexpected_intr
1089 * can find the hwif and prevent irq storms.
1090 * No drives are attached to the new hwif, choose_drive
1091 * can't do anything stupid (yet).
1092 * Add ourself as the 2nd entry to the hwgroup->hwif
1093 * linked list, the first entry is the hwif that owns
1094 * hwgroup->handler - do not change that.
1096 spin_lock_irq(&ide_lock
);
1097 hwif
->next
= hwgroup
->hwif
->next
;
1098 hwgroup
->hwif
->next
= hwif
;
1099 BUG_ON(hwif
->next
== hwif
);
1100 spin_unlock_irq(&ide_lock
);
1102 hwgroup
= kmalloc_node(sizeof(*hwgroup
), GFP_KERNEL
|__GFP_ZERO
,
1103 hwif_to_node(hwif
));
1104 if (hwgroup
== NULL
)
1107 hwif
->hwgroup
= hwgroup
;
1108 hwgroup
->hwif
= hwif
->next
= hwif
;
1110 init_timer(&hwgroup
->timer
);
1111 hwgroup
->timer
.function
= &ide_timer_expiry
;
1112 hwgroup
->timer
.data
= (unsigned long) hwgroup
;
1115 ide_ports
[hwif
->index
] = hwif
;
1118 * Allocate the irq, if not already obtained for another hwif
1120 if (!match
|| match
->irq
!= hwif
->irq
) {
1122 #if defined(__mc68000__)
1124 #endif /* __mc68000__ */
1126 if (IDE_CHIPSET_IS_PCI(hwif
->chipset
))
1129 if (io_ports
->ctl_addr
)
1130 hwif
->tp_ops
->set_irq(hwif
, 1);
1132 if (request_irq(hwif
->irq
,&ide_intr
,sa
,hwif
->name
,hwgroup
))
1136 if (!hwif
->rqsize
) {
1137 if ((hwif
->host_flags
& IDE_HFLAG_NO_LBA48
) ||
1138 (hwif
->host_flags
& IDE_HFLAG_NO_LBA48_DMA
))
1141 hwif
->rqsize
= 65536;
1144 #if !defined(__mc68000__)
1145 printk("%s at 0x%03lx-0x%03lx,0x%03lx on irq %d", hwif
->name
,
1146 io_ports
->data_addr
, io_ports
->status_addr
,
1147 io_ports
->ctl_addr
, hwif
->irq
);
1149 printk("%s at 0x%08lx on irq %d", hwif
->name
,
1150 io_ports
->data_addr
, hwif
->irq
);
1151 #endif /* __mc68000__ */
1153 printk(" (%sed with %s)",
1154 hwif
->sharing_irq
? "shar" : "serializ", match
->name
);
1157 mutex_unlock(&ide_cfg_mtx
);
1160 ide_remove_port_from_hwgroup(hwif
);
1162 mutex_unlock(&ide_cfg_mtx
);
1166 static int ata_lock(dev_t dev
, void *data
)
1168 /* FIXME: we want to pin hwif down */
1172 static struct kobject
*ata_probe(dev_t dev
, int *part
, void *data
)
1174 ide_hwif_t
*hwif
= data
;
1175 int unit
= *part
>> PARTN_BITS
;
1176 ide_drive_t
*drive
= &hwif
->drives
[unit
];
1177 if (!drive
->present
)
1180 if (drive
->media
== ide_disk
)
1181 request_module("ide-disk");
1183 request_module("ide-scsi");
1184 if (drive
->media
== ide_cdrom
|| drive
->media
== ide_optical
)
1185 request_module("ide-cd");
1186 if (drive
->media
== ide_tape
)
1187 request_module("ide-tape");
1188 if (drive
->media
== ide_floppy
)
1189 request_module("ide-floppy");
1194 static struct kobject
*exact_match(dev_t dev
, int *part
, void *data
)
1196 struct gendisk
*p
= data
;
1197 *part
&= (1 << PARTN_BITS
) - 1;
1198 return &p
->dev
.kobj
;
1201 static int exact_lock(dev_t dev
, void *data
)
1203 struct gendisk
*p
= data
;
1210 void ide_register_region(struct gendisk
*disk
)
1212 blk_register_region(MKDEV(disk
->major
, disk
->first_minor
),
1213 disk
->minors
, NULL
, exact_match
, exact_lock
, disk
);
1216 EXPORT_SYMBOL_GPL(ide_register_region
);
1218 void ide_unregister_region(struct gendisk
*disk
)
1220 blk_unregister_region(MKDEV(disk
->major
, disk
->first_minor
),
1224 EXPORT_SYMBOL_GPL(ide_unregister_region
);
1226 void ide_init_disk(struct gendisk
*disk
, ide_drive_t
*drive
)
1228 ide_hwif_t
*hwif
= drive
->hwif
;
1229 unsigned int unit
= (drive
->select
.all
>> 4) & 1;
1231 disk
->major
= hwif
->major
;
1232 disk
->first_minor
= unit
<< PARTN_BITS
;
1233 sprintf(disk
->disk_name
, "hd%c", 'a' + hwif
->index
* MAX_DRIVES
+ unit
);
1234 disk
->queue
= drive
->queue
;
1237 EXPORT_SYMBOL_GPL(ide_init_disk
);
1239 static void ide_remove_drive_from_hwgroup(ide_drive_t
*drive
)
1241 ide_hwgroup_t
*hwgroup
= drive
->hwif
->hwgroup
;
1243 if (drive
== drive
->next
) {
1244 /* special case: last drive from hwgroup. */
1245 BUG_ON(hwgroup
->drive
!= drive
);
1246 hwgroup
->drive
= NULL
;
1250 walk
= hwgroup
->drive
;
1251 while (walk
->next
!= drive
)
1253 walk
->next
= drive
->next
;
1254 if (hwgroup
->drive
== drive
) {
1255 hwgroup
->drive
= drive
->next
;
1256 hwgroup
->hwif
= hwgroup
->drive
->hwif
;
1259 BUG_ON(hwgroup
->drive
== drive
);
1262 static void drive_release_dev (struct device
*dev
)
1264 ide_drive_t
*drive
= container_of(dev
, ide_drive_t
, gendev
);
1266 ide_proc_unregister_device(drive
);
1268 spin_lock_irq(&ide_lock
);
1269 ide_remove_drive_from_hwgroup(drive
);
1273 /* Messed up locking ... */
1274 spin_unlock_irq(&ide_lock
);
1275 blk_cleanup_queue(drive
->queue
);
1276 spin_lock_irq(&ide_lock
);
1277 drive
->queue
= NULL
;
1278 spin_unlock_irq(&ide_lock
);
1280 complete(&drive
->gendev_rel_comp
);
1283 static int hwif_init(ide_hwif_t
*hwif
)
1288 hwif
->irq
= __ide_default_irq(hwif
->io_ports
.data_addr
);
1290 printk("%s: DISABLED, NO IRQ\n", hwif
->name
);
1295 if (register_blkdev(hwif
->major
, hwif
->name
))
1298 if (!hwif
->sg_max_nents
)
1299 hwif
->sg_max_nents
= PRD_ENTRIES
;
1301 hwif
->sg_table
= kmalloc(sizeof(struct scatterlist
)*hwif
->sg_max_nents
,
1303 if (!hwif
->sg_table
) {
1304 printk(KERN_ERR
"%s: unable to allocate SG table.\n", hwif
->name
);
1308 sg_init_table(hwif
->sg_table
, hwif
->sg_max_nents
);
1310 if (init_irq(hwif
) == 0)
1313 old_irq
= hwif
->irq
;
1315 * It failed to initialise. Find the default IRQ for
1316 * this port and try that.
1318 hwif
->irq
= __ide_default_irq(hwif
->io_ports
.data_addr
);
1320 printk("%s: Disabled unable to get IRQ %d.\n",
1321 hwif
->name
, old_irq
);
1324 if (init_irq(hwif
)) {
1325 printk("%s: probed IRQ %d and default IRQ %d failed.\n",
1326 hwif
->name
, old_irq
, hwif
->irq
);
1329 printk("%s: probed IRQ %d failed, using default.\n",
1330 hwif
->name
, hwif
->irq
);
1333 blk_register_region(MKDEV(hwif
->major
, 0), MAX_DRIVES
<< PARTN_BITS
,
1334 THIS_MODULE
, ata_probe
, ata_lock
, hwif
);
1338 unregister_blkdev(hwif
->major
, hwif
->name
);
1342 static void hwif_register_devices(ide_hwif_t
*hwif
)
1346 for (i
= 0; i
< MAX_DRIVES
; i
++) {
1347 ide_drive_t
*drive
= &hwif
->drives
[i
];
1348 struct device
*dev
= &drive
->gendev
;
1351 if (!drive
->present
)
1354 ide_add_generic_settings(drive
);
1356 snprintf(dev
->bus_id
, BUS_ID_SIZE
, "%u.%u", hwif
->index
, i
);
1357 dev
->parent
= &hwif
->gendev
;
1358 dev
->bus
= &ide_bus_type
;
1359 dev
->driver_data
= drive
;
1360 dev
->release
= drive_release_dev
;
1362 ret
= device_register(dev
);
1364 printk(KERN_WARNING
"IDE: %s: device_register error: "
1365 "%d\n", __func__
, ret
);
1369 static void ide_port_init_devices(ide_hwif_t
*hwif
)
1371 const struct ide_port_ops
*port_ops
= hwif
->port_ops
;
1374 for (i
= 0; i
< MAX_DRIVES
; i
++) {
1375 ide_drive_t
*drive
= &hwif
->drives
[i
];
1377 if (hwif
->host_flags
& IDE_HFLAG_IO_32BIT
)
1378 drive
->io_32bit
= 1;
1379 if (hwif
->host_flags
& IDE_HFLAG_UNMASK_IRQS
)
1381 if (hwif
->host_flags
& IDE_HFLAG_NO_UNMASK_IRQS
)
1382 drive
->no_unmask
= 1;
1384 if (port_ops
&& port_ops
->init_dev
)
1385 port_ops
->init_dev(drive
);
1389 static void ide_init_port(ide_hwif_t
*hwif
, unsigned int port
,
1390 const struct ide_port_info
*d
)
1392 hwif
->channel
= port
;
1395 hwif
->chipset
= d
->chipset
;
1400 if ((!hwif
->irq
&& (d
->host_flags
& IDE_HFLAG_LEGACY_IRQS
)) ||
1401 (d
->host_flags
& IDE_HFLAG_FORCE_LEGACY_IRQS
))
1402 hwif
->irq
= port
? 15 : 14;
1404 /* ->host_flags may be set by ->init_iops (or even earlier...) */
1405 hwif
->host_flags
|= d
->host_flags
;
1406 hwif
->pio_mask
= d
->pio_mask
;
1409 hwif
->tp_ops
= d
->tp_ops
;
1411 /* ->set_pio_mode for DTC2278 is currently limited to port 0 */
1412 if (hwif
->chipset
!= ide_dtc2278
|| hwif
->channel
== 0)
1413 hwif
->port_ops
= d
->port_ops
;
1415 hwif
->swdma_mask
= d
->swdma_mask
;
1416 hwif
->mwdma_mask
= d
->mwdma_mask
;
1417 hwif
->ultra_mask
= d
->udma_mask
;
1419 if ((d
->host_flags
& IDE_HFLAG_NO_DMA
) == 0) {
1423 rc
= d
->init_dma(hwif
, d
);
1425 rc
= ide_hwif_setup_dma(hwif
, d
);
1428 printk(KERN_INFO
"%s: DMA disabled\n", hwif
->name
);
1430 hwif
->swdma_mask
= 0;
1431 hwif
->mwdma_mask
= 0;
1432 hwif
->ultra_mask
= 0;
1433 } else if (d
->dma_ops
)
1434 hwif
->dma_ops
= d
->dma_ops
;
1437 if ((d
->host_flags
& IDE_HFLAG_SERIALIZE
) ||
1438 ((d
->host_flags
& IDE_HFLAG_SERIALIZE_DMA
) && hwif
->dma_base
)) {
1440 hwif
->mate
->serialized
= hwif
->serialized
= 1;
1443 if (d
->host_flags
& IDE_HFLAG_RQSIZE_256
)
1446 /* call chipset specific routine for each enabled port */
1451 static void ide_port_cable_detect(ide_hwif_t
*hwif
)
1453 const struct ide_port_ops
*port_ops
= hwif
->port_ops
;
1455 if (port_ops
&& port_ops
->cable_detect
&& (hwif
->ultra_mask
& 0x78)) {
1456 if (hwif
->cbl
!= ATA_CBL_PATA40_SHORT
)
1457 hwif
->cbl
= port_ops
->cable_detect(hwif
);
1461 static ssize_t
store_delete_devices(struct device
*portdev
,
1462 struct device_attribute
*attr
,
1463 const char *buf
, size_t n
)
1465 ide_hwif_t
*hwif
= dev_get_drvdata(portdev
);
1467 if (strncmp(buf
, "1", n
))
1470 ide_port_unregister_devices(hwif
);
1475 static DEVICE_ATTR(delete_devices
, S_IWUSR
, NULL
, store_delete_devices
);
1477 static ssize_t
store_scan(struct device
*portdev
,
1478 struct device_attribute
*attr
,
1479 const char *buf
, size_t n
)
1481 ide_hwif_t
*hwif
= dev_get_drvdata(portdev
);
1483 if (strncmp(buf
, "1", n
))
1486 ide_port_unregister_devices(hwif
);
1487 ide_port_scan(hwif
);
1492 static DEVICE_ATTR(scan
, S_IWUSR
, NULL
, store_scan
);
1494 static struct device_attribute
*ide_port_attrs
[] = {
1495 &dev_attr_delete_devices
,
1500 static int ide_sysfs_register_port(ide_hwif_t
*hwif
)
1504 for (i
= 0; ide_port_attrs
[i
]; i
++) {
1505 rc
= device_create_file(hwif
->portdev
, ide_port_attrs
[i
]);
1513 static unsigned int ide_indexes
;
1516 * ide_find_port_slot - find free port slot
1519 * Return the new port slot index or -ENOENT if we are out of free slots.
1522 static int ide_find_port_slot(const struct ide_port_info
*d
)
1525 u8 bootable
= (d
&& (d
->host_flags
& IDE_HFLAG_NON_BOOTABLE
)) ? 0 : 1;
1526 u8 i
= (d
&& (d
->host_flags
& IDE_HFLAG_QD_2ND_PORT
)) ? 1 : 0;;
1529 * Claim an unassigned slot.
1531 * Give preference to claiming other slots before claiming ide0/ide1,
1532 * just in case there's another interface yet-to-be-scanned
1533 * which uses ports 0x1f0/0x170 (the ide0/ide1 defaults).
1535 * Unless there is a bootable card that does not use the standard
1536 * ports 0x1f0/0x170 (the ide0/ide1 defaults).
1538 mutex_lock(&ide_cfg_mtx
);
1539 if (MAX_HWIFS
== 1) {
1540 if (ide_indexes
== 0 && i
== 0)
1544 if ((ide_indexes
| i
) != (1 << MAX_HWIFS
) - 1)
1545 idx
= ffz(ide_indexes
| i
);
1547 if ((ide_indexes
| 3) != (1 << MAX_HWIFS
) - 1)
1548 idx
= ffz(ide_indexes
| 3);
1549 else if ((ide_indexes
& 3) != 3)
1550 idx
= ffz(ide_indexes
);
1554 ide_indexes
|= (1 << idx
);
1555 mutex_unlock(&ide_cfg_mtx
);
1560 static void ide_free_port_slot(int idx
)
1562 mutex_lock(&ide_cfg_mtx
);
1563 ide_indexes
&= ~(1 << idx
);
1564 mutex_unlock(&ide_cfg_mtx
);
1567 struct ide_host
*ide_host_alloc_all(const struct ide_port_info
*d
,
1570 struct ide_host
*host
;
1573 host
= kzalloc(sizeof(*host
), GFP_KERNEL
);
1577 for (i
= 0; i
< MAX_HWIFS
; i
++) {
1584 hwif
= kzalloc(sizeof(*hwif
), GFP_KERNEL
);
1588 idx
= ide_find_port_slot(d
);
1590 printk(KERN_ERR
"%s: no free slot for interface\n",
1591 d
? d
->name
: "ide");
1596 ide_init_port_data(hwif
, idx
);
1600 host
->ports
[i
] = hwif
;
1604 if (host
->n_ports
== 0) {
1610 host
->dev
[0] = hws
[0]->dev
;
1614 EXPORT_SYMBOL_GPL(ide_host_alloc_all
);
1616 struct ide_host
*ide_host_alloc(const struct ide_port_info
*d
, hw_regs_t
**hws
)
1618 hw_regs_t
*hws_all
[MAX_HWIFS
];
1621 for (i
= 0; i
< MAX_HWIFS
; i
++)
1622 hws_all
[i
] = (i
< 4) ? hws
[i
] : NULL
;
1624 return ide_host_alloc_all(d
, hws_all
);
1626 EXPORT_SYMBOL_GPL(ide_host_alloc
);
1628 int ide_host_register(struct ide_host
*host
, const struct ide_port_info
*d
,
1631 ide_hwif_t
*hwif
, *mate
= NULL
;
1634 for (i
= 0; i
< MAX_HWIFS
; i
++) {
1635 hwif
= host
->ports
[i
];
1642 ide_init_port_hw(hwif
, hws
[i
]);
1643 ide_port_apply_params(hwif
);
1650 if ((i
& 1) && mate
) {
1655 mate
= (i
& 1) ? NULL
: hwif
;
1657 ide_init_port(hwif
, i
& 1, d
);
1658 ide_port_cable_detect(hwif
);
1659 ide_port_init_devices(hwif
);
1662 for (i
= 0; i
< MAX_HWIFS
; i
++) {
1663 hwif
= host
->ports
[i
];
1668 if (ide_probe_port(hwif
) == 0)
1671 if (hwif
->chipset
!= ide_4drives
|| !hwif
->mate
||
1672 !hwif
->mate
->present
)
1673 ide_register_port(hwif
);
1676 ide_port_tune_devices(hwif
);
1679 for (i
= 0; i
< MAX_HWIFS
; i
++) {
1680 hwif
= host
->ports
[i
];
1685 if (hwif_init(hwif
) == 0) {
1686 printk(KERN_INFO
"%s: failed to initialize IDE "
1687 "interface\n", hwif
->name
);
1695 ide_port_setup_devices(hwif
);
1697 ide_acpi_init(hwif
);
1700 ide_acpi_port_init_devices(hwif
);
1703 for (i
= 0; i
< MAX_HWIFS
; i
++) {
1704 hwif
= host
->ports
[i
];
1709 if (hwif
->chipset
== ide_unknown
)
1710 hwif
->chipset
= ide_generic
;
1713 hwif_register_devices(hwif
);
1716 for (i
= 0; i
< MAX_HWIFS
; i
++) {
1717 hwif
= host
->ports
[i
];
1722 ide_sysfs_register_port(hwif
);
1723 ide_proc_register_port(hwif
);
1726 ide_proc_port_register_devices(hwif
);
1731 EXPORT_SYMBOL_GPL(ide_host_register
);
1733 int ide_host_add(const struct ide_port_info
*d
, hw_regs_t
**hws
,
1734 struct ide_host
**hostp
)
1736 struct ide_host
*host
;
1739 host
= ide_host_alloc(d
, hws
);
1743 rc
= ide_host_register(host
, d
, hws
);
1745 ide_host_free(host
);
1754 EXPORT_SYMBOL_GPL(ide_host_add
);
1756 void ide_host_free(struct ide_host
*host
)
1761 for (i
= 0; i
< MAX_HWIFS
; i
++) {
1762 hwif
= host
->ports
[i
];
1767 ide_free_port_slot(hwif
->index
);
1773 EXPORT_SYMBOL_GPL(ide_host_free
);
1775 void ide_host_remove(struct ide_host
*host
)
1779 for (i
= 0; i
< MAX_HWIFS
; i
++) {
1781 ide_unregister(host
->ports
[i
]);
1784 ide_host_free(host
);
1786 EXPORT_SYMBOL_GPL(ide_host_remove
);
1788 void ide_port_scan(ide_hwif_t
*hwif
)
1790 ide_port_apply_params(hwif
);
1791 ide_port_cable_detect(hwif
);
1792 ide_port_init_devices(hwif
);
1794 if (ide_probe_port(hwif
) < 0)
1799 ide_port_tune_devices(hwif
);
1800 ide_acpi_port_init_devices(hwif
);
1801 ide_port_setup_devices(hwif
);
1802 hwif_register_devices(hwif
);
1803 ide_proc_port_register_devices(hwif
);
1805 EXPORT_SYMBOL_GPL(ide_port_scan
);
1807 static void ide_legacy_init_one(hw_regs_t
**hws
, hw_regs_t
*hw
,
1808 u8 port_no
, const struct ide_port_info
*d
,
1809 unsigned long config
)
1811 unsigned long base
, ctl
;
1824 if (!request_region(base
, 8, d
->name
)) {
1825 printk(KERN_ERR
"%s: I/O resource 0x%lX-0x%lX not free.\n",
1826 d
->name
, base
, base
+ 7);
1830 if (!request_region(ctl
, 1, d
->name
)) {
1831 printk(KERN_ERR
"%s: I/O resource 0x%lX not free.\n",
1833 release_region(base
, 8);
1837 ide_std_init_ports(hw
, base
, ctl
);
1839 hw
->chipset
= d
->chipset
;
1840 hw
->config
= config
;
1845 int ide_legacy_device_add(const struct ide_port_info
*d
, unsigned long config
)
1847 hw_regs_t hw
[2], *hws
[] = { NULL
, NULL
, NULL
, NULL
};
1849 memset(&hw
, 0, sizeof(hw
));
1851 if ((d
->host_flags
& IDE_HFLAG_QD_2ND_PORT
) == 0)
1852 ide_legacy_init_one(hws
, &hw
[0], 0, d
, config
);
1853 ide_legacy_init_one(hws
, &hw
[1], 1, d
, config
);
1855 if (hws
[0] == NULL
&& hws
[1] == NULL
&&
1856 (d
->host_flags
& IDE_HFLAG_SINGLE
))
1859 return ide_host_add(d
, hws
, NULL
);
1861 EXPORT_SYMBOL_GPL(ide_legacy_device_add
);