2 * linux/drivers/ide/ide-probe.c Version 1.11 Mar 05, 2003
4 * Copyright (C) 1994-1998 Linus Torvalds & authors (see below)
8 * Mostly written by Mark Lord <mlord@pobox.com>
9 * and Gadi Oxman <gadio@netvision.net.il>
10 * and Andre Hedrick <andre@linux-ide.org>
12 * See linux/MAINTAINERS for address of current maintainer.
14 * This is the IDE probe module, as evolved from hd.c and ide.c.
16 * Version 1.00 move drive probing code from ide.c to ide-probe.c
17 * Version 1.01 fix compilation problem for m68k
18 * Version 1.02 increase WAIT_PIDENTIFY to avoid CD-ROM locking at boot
20 * Version 1.03 fix for (hwif->chipset == ide_4drives)
21 * Version 1.04 fixed buggy treatments of known flash memory cards
23 * Version 1.05 fix for (hwif->chipset == ide_pdc4030)
25 * allowed for secondary flash card to be detectable
26 * with new flag : drive->ata_flash : 1;
27 * Version 1.06 stream line request queue and prep for cascade project.
28 * Version 1.07 max_sect <= 255; slower disks would get behind and
29 * then fall over when they get to 256. Paul G.
30 * Version 1.10 Update set for new IDE. drive->id is now always
31 * valid after probe time even with noprobe
34 #undef REALLY_SLOW_IO /* most systems can safely undef this */
36 #include <linux/config.h>
37 #include <linux/module.h>
38 #include <linux/types.h>
39 #include <linux/string.h>
40 #include <linux/kernel.h>
41 #include <linux/timer.h>
43 #include <linux/interrupt.h>
44 #include <linux/major.h>
45 #include <linux/errno.h>
46 #include <linux/genhd.h>
47 #include <linux/slab.h>
48 #include <linux/delay.h>
49 #include <linux/ide.h>
50 #include <linux/spinlock.h>
51 #include <linux/kmod.h>
52 #include <linux/pci.h>
54 #include <asm/byteorder.h>
56 #include <asm/uaccess.h>
60 * generic_id - add a generic drive id
61 * @drive: drive to make an ID block for
63 * Add a fake id field to the drive we are passed. This allows
64 * use to skip a ton of NULL checks (which people always miss)
65 * and make drive properties unconditional outside of this file
68 static void generic_id(ide_drive_t
*drive
)
70 drive
->id
->cyls
= drive
->cyl
;
71 drive
->id
->heads
= drive
->head
;
72 drive
->id
->sectors
= drive
->sect
;
73 drive
->id
->cur_cyls
= drive
->cyl
;
74 drive
->id
->cur_heads
= drive
->head
;
75 drive
->id
->cur_sectors
= drive
->sect
;
79 * drive_is_flashcard - check for compact flash
80 * @drive: drive to check
82 * CompactFlash cards and their brethern pretend to be removable
84 * (1) they never have a slave unit, and
85 * (2) they don't have doorlock mechanisms.
86 * This test catches them, and is invoked elsewhere when setting
87 * appropriate config bits.
89 * FIXME: This treatment is probably applicable for *all* PCMCIA (PC CARD)
90 * devices, so in linux 2.3.x we should change this to just treat all
91 * PCMCIA drives this way, and get rid of the model-name tests below
92 * (too big of an interface change for 2.4.x).
93 * At that time, we might also consider parameterizing the timeouts and
94 * retries, since these are MUCH faster than mechanical drives. -M.Lord
97 static inline int drive_is_flashcard (ide_drive_t
*drive
)
99 struct hd_driveid
*id
= drive
->id
;
101 if (drive
->removable
) {
102 if (id
->config
== 0x848a) return 1; /* CompactFlash */
103 if (!strncmp(id
->model
, "KODAK ATA_FLASH", 15) /* Kodak */
104 || !strncmp(id
->model
, "Hitachi CV", 10) /* Hitachi */
105 || !strncmp(id
->model
, "SunDisk SDCFB", 13) /* old SanDisk */
106 || !strncmp(id
->model
, "SanDisk SDCFB", 13) /* SanDisk */
107 || !strncmp(id
->model
, "HAGIWARA HPC", 12) /* Hagiwara */
108 || !strncmp(id
->model
, "LEXAR ATA_FLASH", 15) /* Lexar */
109 || !strncmp(id
->model
, "ATA_FLASH", 9)) /* Simple Tech */
111 return 1; /* yes, it is a flash memory card */
114 return 0; /* no, it is not a flash memory card */
118 * do_identify - identify a drive
119 * @drive: drive to identify
122 * Called when we have issued a drive identify command to
123 * read and parse the results. This function is run with
124 * interrupts disabled.
127 static inline void do_identify (ide_drive_t
*drive
, u8 cmd
)
129 ide_hwif_t
*hwif
= HWIF(drive
);
131 struct hd_driveid
*id
;
134 /* read 512 bytes of id info */
135 hwif
->ata_input_data(drive
, id
, SECTOR_WORDS
);
141 #if defined (CONFIG_SCSI_EATA_DMA) || defined (CONFIG_SCSI_EATA_PIO) || defined (CONFIG_SCSI_EATA)
143 * EATA SCSI controllers do a hardware ATA emulation:
144 * Ignore them if there is a driver for them available.
146 if ((id
->model
[0] == 'P' && id
->model
[1] == 'M') ||
147 (id
->model
[0] == 'S' && id
->model
[1] == 'K')) {
148 printk("%s: EATA SCSI HBA %.10s\n", drive
->name
, id
->model
);
151 #endif /* CONFIG_SCSI_EATA_DMA || CONFIG_SCSI_EATA_PIO */
154 * WIN_IDENTIFY returns little-endian info,
155 * WIN_PIDENTIFY *usually* returns little-endian info.
157 if (cmd
== WIN_PIDENTIFY
) {
158 if ((id
->model
[0] == 'N' && id
->model
[1] == 'E') /* NEC */
159 || (id
->model
[0] == 'F' && id
->model
[1] == 'X') /* Mitsumi */
160 || (id
->model
[0] == 'P' && id
->model
[1] == 'i'))/* Pioneer */
161 /* Vertos drives may still be weird */
164 ide_fixstring(id
->model
, sizeof(id
->model
), bswap
);
165 ide_fixstring(id
->fw_rev
, sizeof(id
->fw_rev
), bswap
);
166 ide_fixstring(id
->serial_no
, sizeof(id
->serial_no
), bswap
);
168 if (strstr(id
->model
, "E X A B Y T E N E S T"))
171 /* we depend on this a lot! */
172 id
->model
[sizeof(id
->model
)-1] = '\0';
173 printk("%s: %s, ", drive
->name
, id
->model
);
178 * Check for an ATAPI device
180 if (cmd
== WIN_PIDENTIFY
) {
181 u8 type
= (id
->config
>> 8) & 0x1f;
185 if (!strstr(id
->model
, "CD-ROM")) {
186 if (!strstr(id
->model
, "oppy") &&
187 !strstr(id
->model
, "poyp") &&
188 !strstr(id
->model
, "ZIP"))
189 printk("cdrom or floppy?, assuming ");
190 if (drive
->media
!= ide_cdrom
) {
192 drive
->removable
= 1;
196 /* Early cdrom models used zero */
199 drive
->removable
= 1;
201 /* kludge for Apple PowerBook internal zip */
202 if (!strstr(id
->model
, "CD-ROM") &&
203 strstr(id
->model
, "ZIP")) {
209 printk ("CD/DVD-ROM");
216 drive
->removable
= 1;
219 printk("UNKNOWN (type %d)", type
);
228 * Not an ATAPI device: looks like a "regular" hard disk
230 if (id
->config
& (1<<7))
231 drive
->removable
= 1;
233 if (drive_is_flashcard(drive
))
235 drive
->media
= ide_disk
;
236 printk("%s DISK drive\n", (drive
->is_flash
) ? "CFA" : "ATA" );
247 * actual_try_to_identify - send ata/atapi identify
248 * @drive: drive to identify
249 * @cmd: command to use
251 * try_to_identify() sends an ATA(PI) IDENTIFY request to a drive
252 * and waits for a response. It also monitors irqs while this is
253 * happening, in hope of automatically determining which one is
254 * being used by the interface.
256 * Returns: 0 device was identified
257 * 1 device timed-out (no response to identify request)
258 * 2 device aborted the command (refused to identify itself)
261 static int actual_try_to_identify (ide_drive_t
*drive
, u8 cmd
)
263 ide_hwif_t
*hwif
= HWIF(drive
);
265 unsigned long hd_status
;
266 unsigned long timeout
;
269 /* take a deep breath */
272 if (IDE_CONTROL_REG
) {
273 a
= hwif
->INB(IDE_ALTSTATUS_REG
);
274 s
= hwif
->INB(IDE_STATUS_REG
);
275 if ((a
^ s
) & ~INDEX_STAT
) {
276 printk(KERN_INFO
"%s: probing with STATUS(0x%02x) instead of "
277 "ALTSTATUS(0x%02x)\n", drive
->name
, s
, a
);
278 /* ancient Seagate drives, broken interfaces */
279 hd_status
= IDE_STATUS_REG
;
281 /* use non-intrusive polling */
282 hd_status
= IDE_ALTSTATUS_REG
;
285 hd_status
= IDE_STATUS_REG
;
287 /* set features register for atapi
288 * identify command to be sure of reply
290 if ((cmd
== WIN_PIDENTIFY
))
291 /* disable dma & overlap */
292 hwif
->OUTB(0, IDE_FEATURE_REG
);
294 /* ask drive for ID */
295 hwif
->OUTB(cmd
, IDE_COMMAND_REG
);
297 timeout
= ((cmd
== WIN_IDENTIFY
) ? WAIT_WORSTCASE
: WAIT_PIDENTIFY
) / 2;
300 if (time_after(jiffies
, timeout
)) {
301 /* drive timed-out */
304 /* give drive a breather */
306 } while ((hwif
->INB(hd_status
)) & BUSY_STAT
);
308 /* wait for IRQ and DRQ_STAT */
310 if (OK_STAT((hwif
->INB(IDE_STATUS_REG
)), DRQ_STAT
, BAD_R_STAT
)) {
313 /* local CPU only; some systems need this */
314 local_irq_save(flags
);
315 /* drive returned ID */
316 do_identify(drive
, cmd
);
317 /* drive responded with ID */
319 /* clear drive IRQ */
320 (void) hwif
->INB(IDE_STATUS_REG
);
321 local_irq_restore(flags
);
323 /* drive refused ID */
330 * try_to_identify - try to identify a drive
331 * @drive: drive to probe
332 * @cmd: command to use
334 * Issue the identify command and then do IRQ probing to
335 * complete the identification when needed by finding the
336 * IRQ the drive is attached to
339 static int try_to_identify (ide_drive_t
*drive
, u8 cmd
)
341 ide_hwif_t
*hwif
= HWIF(drive
);
344 unsigned long cookie
= 0;
347 * Disable device irq unless we need to
348 * probe for it. Otherwise we'll get spurious
349 * interrupts during the identify-phase that
350 * the irq handler isn't expecting.
352 if (IDE_CONTROL_REG
) {
353 u8 ctl
= drive
->ctl
| 2;
356 cookie
= probe_irq_on();
357 /* enable device irq */
360 hwif
->OUTB(ctl
, IDE_CONTROL_REG
);
363 retval
= actual_try_to_identify(drive
, cmd
);
367 /* mask device irq */
368 hwif
->OUTB(drive
->ctl
|2, IDE_CONTROL_REG
);
369 /* clear drive IRQ */
370 (void) hwif
->INB(IDE_STATUS_REG
);
372 irq
= probe_irq_off(cookie
);
377 /* Mmmm.. multiple IRQs..
378 * don't know which was ours
380 printk("%s: IRQ probe failed (0x%lx)\n",
381 drive
->name
, cookie
);
390 * do_probe - probe an IDE device
391 * @drive: drive to probe
392 * @cmd: command to use
394 * do_probe() has the difficult job of finding a drive if it exists,
395 * without getting hung up if it doesn't exist, without trampling on
396 * ethernet cards, and without leaving any IRQs dangling to haunt us later.
398 * If a drive is "known" to exist (from CMOS or kernel parameters),
399 * but does not respond right away, the probe will "hang in there"
400 * for the maximum wait time (about 30 seconds), otherwise it will
401 * exit much more quickly.
403 * Returns: 0 device was identified
404 * 1 device timed-out (no response to identify request)
405 * 2 device aborted the command (refused to identify itself)
406 * 3 bad status from device (possible for ATAPI drives)
407 * 4 probe was not attempted because failure was obvious
410 static int do_probe (ide_drive_t
*drive
, u8 cmd
)
413 ide_hwif_t
*hwif
= HWIF(drive
);
415 if (drive
->present
) {
416 /* avoid waiting for inappropriate probes */
417 if ((drive
->media
!= ide_disk
) && (cmd
== WIN_IDENTIFY
))
421 printk("probing for %s: present=%d, media=%d, probetype=%s\n",
422 drive
->name
, drive
->present
, drive
->media
,
423 (cmd
== WIN_IDENTIFY
) ? "ATA" : "ATAPI");
426 /* needed for some systems
427 * (e.g. crw9624 as drive0 with disk as slave)
432 if (hwif
->INB(IDE_SELECT_REG
) != drive
->select
.all
&& !drive
->present
) {
433 if (drive
->select
.b
.unit
!= 0) {
434 /* exit with drive0 selected */
435 SELECT_DRIVE(&hwif
->drives
[0]);
436 /* allow BUSY_STAT to assert & clear */
439 /* no i/f present: mmm.. this should be a 4 -ml */
443 if (OK_STAT((hwif
->INB(IDE_STATUS_REG
)), READY_STAT
, BUSY_STAT
) ||
444 drive
->present
|| cmd
== WIN_PIDENTIFY
) {
445 /* send cmd and wait */
446 if ((rc
= try_to_identify(drive
, cmd
))) {
447 /* failed: try again */
448 rc
= try_to_identify(drive
,cmd
);
450 if (hwif
->INB(IDE_STATUS_REG
) == (BUSY_STAT
|READY_STAT
))
453 if ((rc
== 1 && cmd
== WIN_PIDENTIFY
) &&
454 ((drive
->autotune
== IDE_TUNE_DEFAULT
) ||
455 (drive
->autotune
== IDE_TUNE_AUTO
))) {
456 unsigned long timeout
;
457 printk("%s: no response (status = 0x%02x), "
458 "resetting drive\n", drive
->name
,
459 hwif
->INB(IDE_STATUS_REG
));
461 hwif
->OUTB(drive
->select
.all
, IDE_SELECT_REG
);
463 hwif
->OUTB(WIN_SRST
, IDE_COMMAND_REG
);
465 while (((hwif
->INB(IDE_STATUS_REG
)) & BUSY_STAT
) &&
466 time_before(jiffies
, timeout
+ WAIT_WORSTCASE
))
468 rc
= try_to_identify(drive
, cmd
);
471 printk("%s: no response (status = 0x%02x)\n",
472 drive
->name
, hwif
->INB(IDE_STATUS_REG
));
473 /* ensure drive irq is clear */
474 (void) hwif
->INB(IDE_STATUS_REG
);
476 /* not present or maybe ATAPI */
479 if (drive
->select
.b
.unit
!= 0) {
480 /* exit with drive0 selected */
481 SELECT_DRIVE(&hwif
->drives
[0]);
483 /* ensure drive irq is clear */
484 (void) hwif
->INB(IDE_STATUS_REG
);
492 static void enable_nest (ide_drive_t
*drive
)
494 ide_hwif_t
*hwif
= HWIF(drive
);
495 unsigned long timeout
;
497 printk("%s: enabling %s -- ", hwif
->name
, drive
->id
->model
);
500 hwif
->OUTB(EXABYTE_ENABLE_NEST
, IDE_COMMAND_REG
);
501 timeout
= jiffies
+ WAIT_WORSTCASE
;
503 if (time_after(jiffies
, timeout
)) {
504 printk("failed (timeout)\n");
508 } while ((hwif
->INB(IDE_STATUS_REG
)) & BUSY_STAT
);
512 if (!OK_STAT((hwif
->INB(IDE_STATUS_REG
)), 0, BAD_STAT
)) {
513 printk("failed (status = 0x%02x)\n", hwif
->INB(IDE_STATUS_REG
));
518 /* if !(success||timed-out) */
519 if (do_probe(drive
, WIN_IDENTIFY
) >= 2) {
520 /* look for ATAPI device */
521 (void) do_probe(drive
, WIN_PIDENTIFY
);
526 * probe_for_drives - upper level drive probe
527 * @drive: drive to probe for
529 * probe_for_drive() tests for existence of a given drive using do_probe()
530 * and presents things to the user as needed.
532 * Returns: 0 no device was found
533 * 1 device was found (note: drive->present might
537 static inline u8
probe_for_drive (ide_drive_t
*drive
)
540 * In order to keep things simple we have an id
541 * block for all drives at all times. If the device
542 * is pre ATA or refuses ATA/ATAPI identify we
543 * will add faked data to this.
545 * Also note that 0 everywhere means "can't do X"
548 drive
->id
= kmalloc(SECTOR_WORDS
*4, GFP_KERNEL
);
550 if(drive
->id
== NULL
)
552 printk(KERN_ERR
"ide: out of memory for id data.\n");
555 memset(drive
->id
, 0, SECTOR_WORDS
* 4);
556 strcpy(drive
->id
->model
, "UNKNOWN");
561 /* if !(success||timed-out) */
562 if (do_probe(drive
, WIN_IDENTIFY
) >= 2) {
563 /* look for ATAPI device */
564 (void) do_probe(drive
, WIN_PIDENTIFY
);
566 if (strstr(drive
->id
->model
, "E X A B Y T E N E S T"))
569 /* drive not found */
572 /* identification failed? */
573 if (!drive
->id_read
) {
574 if (drive
->media
== ide_disk
) {
575 printk(KERN_INFO
"%s: non-IDE drive, CHS=%d/%d/%d\n",
576 drive
->name
, drive
->cyl
,
577 drive
->head
, drive
->sect
);
578 } else if (drive
->media
== ide_cdrom
) {
579 printk(KERN_INFO
"%s: ATAPI cdrom (?)\n", drive
->name
);
582 printk(KERN_WARNING
"%s: Unknown device on bus refused identification. Ignoring.\n", drive
->name
);
586 /* drive was found */
590 /* The drive wasn't being helpful. Add generic info only */
593 return drive
->present
;
596 static void hwif_release_dev (struct device
*dev
)
598 ide_hwif_t
*hwif
= container_of(dev
, ide_hwif_t
, gendev
);
600 up(&hwif
->gendev_rel_sem
);
603 static void hwif_register (ide_hwif_t
*hwif
)
605 /* register with global device tree */
606 strlcpy(hwif
->gendev
.bus_id
,hwif
->name
,BUS_ID_SIZE
);
607 hwif
->gendev
.driver_data
= hwif
;
608 if (hwif
->gendev
.parent
== NULL
) {
610 hwif
->gendev
.parent
= &hwif
->pci_dev
->dev
;
612 /* Would like to do = &device_legacy */
613 hwif
->gendev
.parent
= NULL
;
615 hwif
->gendev
.release
= hwif_release_dev
;
616 device_register(&hwif
->gendev
);
619 static int wait_hwif_ready(ide_hwif_t
*hwif
)
623 printk(KERN_DEBUG
"Probing IDE interface %s...\n", hwif
->name
);
625 /* Let HW settle down a bit from whatever init state we
629 /* Wait for BSY bit to go away, spec timeout is 30 seconds,
630 * I know of at least one disk who takes 31 seconds, I use 35
633 rc
= ide_wait_not_busy(hwif
, 35000);
637 /* Now make sure both master & slave are ready */
638 SELECT_DRIVE(&hwif
->drives
[0]);
639 hwif
->OUTB(8, hwif
->io_ports
[IDE_CONTROL_OFFSET
]);
641 rc
= ide_wait_not_busy(hwif
, 10000);
644 SELECT_DRIVE(&hwif
->drives
[1]);
645 hwif
->OUTB(8, hwif
->io_ports
[IDE_CONTROL_OFFSET
]);
647 rc
= ide_wait_not_busy(hwif
, 10000);
649 /* Exit function with master reselected (let's be sane) */
650 SELECT_DRIVE(&hwif
->drives
[0]);
656 * ide_undecoded_slave - look for bad CF adapters
659 * Analyse the drives on the interface and attempt to decide if we
660 * have the same drive viewed twice. This occurs with crap CF adapters
661 * and PCMCIA sometimes.
664 void ide_undecoded_slave(ide_hwif_t
*hwif
)
666 ide_drive_t
*drive0
= &hwif
->drives
[0];
667 ide_drive_t
*drive1
= &hwif
->drives
[1];
669 if (drive0
->present
== 0 || drive1
->present
== 0)
672 /* If the models don't match they are not the same product */
673 if (strcmp(drive0
->id
->model
, drive1
->id
->model
))
676 /* Serial numbers do not match */
677 if (strncmp(drive0
->id
->serial_no
, drive1
->id
->serial_no
, 20))
680 /* No serial number, thankfully very rare for CF */
681 if (drive0
->id
->serial_no
[0] == 0)
684 /* Appears to be an IDE flash adapter with decode bugs */
685 printk(KERN_WARNING
"ide-probe: ignoring undecoded slave\n");
690 EXPORT_SYMBOL_GPL(ide_undecoded_slave
);
693 * This routine only knows how to look for drive units 0 and 1
694 * on an interface, so any setting of MAX_DRIVES > 2 won't work here.
696 static void probe_hwif(ide_hwif_t
*hwif
)
705 if ((hwif
->chipset
!= ide_4drives
|| !hwif
->mate
|| !hwif
->mate
->present
) &&
706 (ide_hwif_request_regions(hwif
))) {
708 for (unit
= 0; unit
< MAX_DRIVES
; ++unit
) {
709 ide_drive_t
*drive
= &hwif
->drives
[unit
];
710 if (drive
->present
) {
712 printk(KERN_ERR
"%s: ERROR, PORTS ALREADY IN USE\n",
718 printk(KERN_ERR
"%s: ports already in use, skipping probe\n",
724 * We must always disable IRQ, as probe_for_drive will assert IRQ, but
725 * we'll install our IRQ driver much later...
729 disable_irq(hwif
->irq
);
731 local_irq_set(flags
);
733 /* This is needed on some PPCs and a bunch of BIOS-less embedded
734 * platforms. Typical cases are:
736 * - The firmware hard reset the disk before booting the kernel,
737 * the drive is still doing it's poweron-reset sequence, that
738 * can take up to 30 seconds
739 * - The firmware does nothing (or no firmware), the device is
740 * still in POST state (same as above actually).
741 * - Some CD/DVD/Writer combo drives tend to drive the bus during
742 * their reset sequence even when they are non-selected slave
743 * devices, thus preventing discovery of the main HD
745 * Doing this wait-for-busy should not harm any existing configuration
746 * (at least things won't be worse than what current code does, that
747 * is blindly go & talk to the drive) and fix some issues like the
752 if (wait_hwif_ready(hwif
))
753 printk(KERN_DEBUG
"%s: Wait for ready failed before probe !\n", hwif
->name
);
756 * Second drive should only exist if first drive was found,
757 * but a lot of cdrom drives are configured as single slaves.
759 for (unit
= 0; unit
< MAX_DRIVES
; ++unit
) {
760 ide_drive_t
*drive
= &hwif
->drives
[unit
];
761 drive
->dn
= (hwif
->channel
? 2 : 0) + unit
;
762 (void) probe_for_drive(drive
);
763 if (drive
->present
&& !hwif
->present
) {
765 if (hwif
->chipset
!= ide_4drives
||
767 !hwif
->mate
->present
) {
772 if (hwif
->io_ports
[IDE_CONTROL_OFFSET
] && hwif
->reset
) {
773 unsigned long timeout
= jiffies
+ WAIT_WORSTCASE
;
776 printk(KERN_WARNING
"%s: reset\n", hwif
->name
);
777 hwif
->OUTB(12, hwif
->io_ports
[IDE_CONTROL_OFFSET
]);
779 hwif
->OUTB(8, hwif
->io_ports
[IDE_CONTROL_OFFSET
]);
782 stat
= hwif
->INB(hwif
->io_ports
[IDE_STATUS_OFFSET
]);
783 } while ((stat
& BUSY_STAT
) && time_after(timeout
, jiffies
));
786 local_irq_restore(flags
);
788 * Use cached IRQ number. It might be (and is...) changed by probe
794 if (!hwif
->present
) {
795 ide_hwif_release_regions(hwif
);
799 for (unit
= 0; unit
< MAX_DRIVES
; ++unit
) {
800 ide_drive_t
*drive
= &hwif
->drives
[unit
];
802 if (drive
->present
) {
803 if (hwif
->tuneproc
!= NULL
&&
804 drive
->autotune
== IDE_TUNE_AUTO
)
805 /* auto-tune PIO mode */
806 hwif
->tuneproc(drive
, 255);
808 * MAJOR HACK BARF :-/
810 * FIXME: chipsets own this cruft!
813 * Move here to prevent module loading clashing.
815 // drive->autodma = hwif->autodma;
816 if ((hwif
->ide_dma_check
) &&
817 ((drive
->autotune
== IDE_TUNE_DEFAULT
) ||
818 (drive
->autotune
== IDE_TUNE_AUTO
))) {
820 * Force DMAing for the beginning of the check.
821 * Some chipsets appear to do interesting
822 * things, if not checked and cleared.
825 hwif
->ide_dma_off_quietly(drive
);
826 #ifdef CONFIG_IDEDMA_ONLYDISK
827 if (drive
->media
== ide_disk
)
829 hwif
->ide_dma_check(drive
);
835 static int hwif_init(ide_hwif_t
*hwif
);
837 int probe_hwif_init_with_fixup(ide_hwif_t
*hwif
, void (*fixup
)(ide_hwif_t
*hwif
))
848 for (unit
= 0; unit
< MAX_DRIVES
; ++unit
) {
849 ide_drive_t
*drive
= &hwif
->drives
[unit
];
850 /* For now don't attach absent drives, we may
851 want them on default or a new "empty" class
852 for hotplug reprobing ? */
853 if (drive
->present
) {
861 int probe_hwif_init(ide_hwif_t
*hwif
)
863 return probe_hwif_init_with_fixup(hwif
, NULL
);
866 EXPORT_SYMBOL(probe_hwif_init
);
870 * save_match() is used to simplify logic in init_irq() below.
872 * A loophole here is that we may not know about a particular
873 * hwif's irq until after that hwif is actually probed/initialized..
874 * This could be a problem for the case where an hwif is on a
875 * dual interface that requires serialization (eg. cmd640) and another
876 * hwif using one of the same irqs is initialized beforehand.
878 * This routine detects and reports such situations, but does not fix them.
880 static void save_match(ide_hwif_t
*hwif
, ide_hwif_t
*new, ide_hwif_t
**match
)
882 ide_hwif_t
*m
= *match
;
884 if (m
&& m
->hwgroup
&& m
->hwgroup
!= new->hwgroup
) {
887 printk("%s: potential irq problem with %s and %s\n",
888 hwif
->name
, new->name
, m
->name
);
890 if (!m
|| m
->irq
!= hwif
->irq
) /* don't undo a prior perfect match */
893 #endif /* MAX_HWIFS > 1 */
898 static int ide_init_queue(ide_drive_t
*drive
)
901 ide_hwif_t
*hwif
= HWIF(drive
);
902 int max_sectors
= 256;
903 int max_sg_entries
= PRD_ENTRIES
;
906 * Our default set up assumes the normal IDE case,
907 * that is 64K segmenting, standard PRD setup
908 * and LBA28. Some drivers then impose their own
909 * limits and LBA48 we could raise it but as yet
913 q
= blk_init_queue(do_ide_request
, &ide_lock
);
917 q
->queuedata
= drive
;
918 blk_queue_segment_boundary(q
, 0xffff);
921 if (hwif
->no_lba48
|| hwif
->no_lba48_dma
)
924 hwif
->rqsize
= 65536;
926 if (hwif
->rqsize
< max_sectors
)
927 max_sectors
= hwif
->rqsize
;
928 blk_queue_max_sectors(q
, max_sectors
);
931 /* When we have an IOMMU, we may have a problem where pci_map_sg()
932 * creates segments that don't completely match our boundary
933 * requirements and thus need to be broken up again. Because it
934 * doesn't align properly either, we may actually have to break up
935 * to more segments than what was we got in the first place, a max
936 * worst case is twice as many.
937 * This will be fixed once we teach pci_map_sg() about our boundary
938 * requirements, hopefully soon. *FIXME*
940 if (!PCI_DMA_BUS_IS_PHYS
)
941 max_sg_entries
>>= 1;
942 #endif /* CONFIG_PCI */
944 blk_queue_max_hw_segments(q
, max_sg_entries
);
945 blk_queue_max_phys_segments(q
, max_sg_entries
);
947 /* assign drive and gendisk queue */
950 drive
->disk
->queue
= drive
->queue
;
952 /* needs drive->queue to be set */
953 ide_toggle_bounce(drive
, 1);
955 /* enable led activity for disk drives only */
956 if (drive
->media
== ide_disk
&& hwif
->led_act
)
957 blk_queue_activity_fn(q
, hwif
->led_act
, drive
);
963 * This routine sets up the irq for an ide interface, and creates a new
964 * hwgroup for the irq/hwif if none was previously assigned.
966 * Much of the code is for correctly detecting/handling irq sharing
967 * and irq serialization situations. This is somewhat complex because
968 * it handles static as well as dynamic (PCMCIA) IDE interfaces.
970 * The SA_INTERRUPT in sa_flags means ide_intr() is always entered with
971 * interrupts completely disabled. This can be bad for interrupt latency,
972 * but anything else has led to problems on some machines. We re-enable
973 * interrupts as much as we can safely do in most places.
975 static int init_irq (ide_hwif_t
*hwif
)
978 ide_hwgroup_t
*hwgroup
;
979 ide_hwif_t
*match
= NULL
;
982 BUG_ON(in_interrupt());
983 BUG_ON(irqs_disabled());
985 hwif
->hwgroup
= NULL
;
988 * Group up with any other hwifs that share our irq(s).
990 for (index
= 0; index
< MAX_HWIFS
; index
++) {
991 ide_hwif_t
*h
= &ide_hwifs
[index
];
992 if (h
->hwgroup
) { /* scan only initialized hwif's */
993 if (hwif
->irq
== h
->irq
) {
994 hwif
->sharing_irq
= h
->sharing_irq
= 1;
995 if (hwif
->chipset
!= ide_pci
||
996 h
->chipset
!= ide_pci
) {
997 save_match(hwif
, h
, &match
);
1000 if (hwif
->serialized
) {
1001 if (hwif
->mate
&& hwif
->mate
->irq
== h
->irq
)
1002 save_match(hwif
, h
, &match
);
1004 if (h
->serialized
) {
1005 if (h
->mate
&& hwif
->irq
== h
->mate
->irq
)
1006 save_match(hwif
, h
, &match
);
1010 #endif /* MAX_HWIFS > 1 */
1012 * If we are still without a hwgroup, then form a new one
1015 hwgroup
= match
->hwgroup
;
1016 hwif
->hwgroup
= hwgroup
;
1018 * Link us into the hwgroup.
1019 * This must be done early, do ensure that unexpected_intr
1020 * can find the hwif and prevent irq storms.
1021 * No drives are attached to the new hwif, choose_drive
1022 * can't do anything stupid (yet).
1023 * Add ourself as the 2nd entry to the hwgroup->hwif
1024 * linked list, the first entry is the hwif that owns
1025 * hwgroup->handler - do not change that.
1027 spin_lock_irq(&ide_lock
);
1028 hwif
->next
= hwgroup
->hwif
->next
;
1029 hwgroup
->hwif
->next
= hwif
;
1030 spin_unlock_irq(&ide_lock
);
1032 hwgroup
= kmalloc(sizeof(ide_hwgroup_t
),GFP_KERNEL
);
1036 hwif
->hwgroup
= hwgroup
;
1038 memset(hwgroup
, 0, sizeof(ide_hwgroup_t
));
1039 hwgroup
->hwif
= hwif
->next
= hwif
;
1041 hwgroup
->handler
= NULL
;
1042 hwgroup
->drive
= NULL
;
1044 init_timer(&hwgroup
->timer
);
1045 hwgroup
->timer
.function
= &ide_timer_expiry
;
1046 hwgroup
->timer
.data
= (unsigned long) hwgroup
;
1050 * Allocate the irq, if not already obtained for another hwif
1052 if (!match
|| match
->irq
!= hwif
->irq
) {
1053 int sa
= SA_INTERRUPT
;
1054 #if defined(__mc68000__) || defined(CONFIG_APUS)
1056 #endif /* __mc68000__ || CONFIG_APUS */
1058 if (IDE_CHIPSET_IS_PCI(hwif
->chipset
)) {
1060 #ifndef CONFIG_IDEPCI_SHARE_IRQ
1062 #endif /* CONFIG_IDEPCI_SHARE_IRQ */
1065 if (hwif
->io_ports
[IDE_CONTROL_OFFSET
])
1067 hwif
->OUTB(0x08, hwif
->io_ports
[IDE_CONTROL_OFFSET
]);
1069 if (request_irq(hwif
->irq
,&ide_intr
,sa
,hwif
->name
,hwgroup
))
1074 * For any present drive:
1075 * - allocate the block device queue
1076 * - link drive into the hwgroup
1078 for (index
= 0; index
< MAX_DRIVES
; ++index
) {
1079 ide_drive_t
*drive
= &hwif
->drives
[index
];
1080 if (!drive
->present
)
1082 if (ide_init_queue(drive
)) {
1083 printk(KERN_ERR
"ide: failed to init %s\n",drive
->name
);
1086 spin_lock_irq(&ide_lock
);
1087 if (!hwgroup
->drive
) {
1088 /* first drive for hwgroup. */
1089 drive
->next
= drive
;
1090 hwgroup
->drive
= drive
;
1091 hwgroup
->hwif
= HWIF(hwgroup
->drive
);
1093 drive
->next
= hwgroup
->drive
->next
;
1094 hwgroup
->drive
->next
= drive
;
1096 spin_unlock_irq(&ide_lock
);
1099 #if !defined(__mc68000__) && !defined(CONFIG_APUS) && !defined(__sparc__)
1100 printk("%s at 0x%03lx-0x%03lx,0x%03lx on irq %d", hwif
->name
,
1101 hwif
->io_ports
[IDE_DATA_OFFSET
],
1102 hwif
->io_ports
[IDE_DATA_OFFSET
]+7,
1103 hwif
->io_ports
[IDE_CONTROL_OFFSET
], hwif
->irq
);
1104 #elif defined(__sparc__)
1105 printk("%s at 0x%03lx-0x%03lx,0x%03lx on irq %s", hwif
->name
,
1106 hwif
->io_ports
[IDE_DATA_OFFSET
],
1107 hwif
->io_ports
[IDE_DATA_OFFSET
]+7,
1108 hwif
->io_ports
[IDE_CONTROL_OFFSET
], __irq_itoa(hwif
->irq
));
1110 printk("%s at 0x%08lx on irq %d", hwif
->name
,
1111 hwif
->io_ports
[IDE_DATA_OFFSET
], hwif
->irq
);
1112 #endif /* __mc68000__ && CONFIG_APUS */
1114 printk(" (%sed with %s)",
1115 hwif
->sharing_irq
? "shar" : "serializ", match
->name
);
1120 spin_lock_irq(&ide_lock
);
1121 if (hwif
->next
== hwif
) {
1123 BUG_ON(hwgroup
->hwif
!= hwif
);
1128 while (g
->next
!= hwif
)
1130 g
->next
= hwif
->next
;
1131 if (hwgroup
->hwif
== hwif
) {
1133 printk(KERN_ERR
"Duh. Uninitialized hwif listed as active hwif.\n");
1136 BUG_ON(hwgroup
->hwif
== hwif
);
1138 spin_unlock_irq(&ide_lock
);
1144 static int ata_lock(dev_t dev
, void *data
)
1146 /* FIXME: we want to pin hwif down */
1150 extern ide_driver_t idedefault_driver
;
1152 struct kobject
*ata_probe(dev_t dev
, int *part
, void *data
)
1154 ide_hwif_t
*hwif
= data
;
1155 int unit
= *part
>> PARTN_BITS
;
1156 ide_drive_t
*drive
= &hwif
->drives
[unit
];
1157 if (!drive
->present
)
1159 if (drive
->driver
== &idedefault_driver
) {
1160 if (drive
->media
== ide_disk
)
1161 (void) request_module("ide-disk");
1163 (void) request_module("ide-scsi");
1164 if (drive
->media
== ide_cdrom
|| drive
->media
== ide_optical
)
1165 (void) request_module("ide-cd");
1166 if (drive
->media
== ide_tape
)
1167 (void) request_module("ide-tape");
1168 if (drive
->media
== ide_floppy
)
1169 (void) request_module("ide-floppy");
1171 if (drive
->driver
== &idedefault_driver
)
1173 *part
&= (1 << PARTN_BITS
) - 1;
1174 return get_disk(drive
->disk
);
1177 static int alloc_disks(ide_hwif_t
*hwif
)
1180 struct gendisk
*disks
[MAX_DRIVES
];
1182 for (unit
= 0; unit
< MAX_DRIVES
; unit
++) {
1183 disks
[unit
] = alloc_disk(1 << PARTN_BITS
);
1187 for (unit
= 0; unit
< MAX_DRIVES
; ++unit
) {
1188 ide_drive_t
*drive
= &hwif
->drives
[unit
];
1189 struct gendisk
*disk
= disks
[unit
];
1190 disk
->major
= hwif
->major
;
1191 disk
->first_minor
= unit
<< PARTN_BITS
;
1192 sprintf(disk
->disk_name
,"hd%c",'a'+hwif
->index
*MAX_DRIVES
+unit
);
1193 disk
->fops
= ide_fops
;
1194 disk
->private_data
= drive
;
1199 printk(KERN_WARNING
"(ide::init_gendisk) Out of memory\n");
1201 put_disk(disks
[unit
]);
1205 static void drive_release_dev (struct device
*dev
)
1207 ide_drive_t
*drive
= container_of(dev
, ide_drive_t
, gendev
);
1209 up(&drive
->gendev_rel_sem
);
1213 * init_gendisk() (as opposed to ide_geninit) is called for each major device,
1214 * after probing for drives, to allocate partition tables and other data
1215 * structures needed for the routines in genhd.c. ide_geninit() gets called
1216 * somewhat later, during the partition check.
1218 static void init_gendisk (ide_hwif_t
*hwif
)
1222 for (unit
= 0; unit
< MAX_DRIVES
; ++unit
) {
1223 ide_drive_t
* drive
= &hwif
->drives
[unit
];
1224 ide_add_generic_settings(drive
);
1225 snprintf(drive
->gendev
.bus_id
,BUS_ID_SIZE
,"%u.%u",
1227 drive
->gendev
.parent
= &hwif
->gendev
;
1228 drive
->gendev
.bus
= &ide_bus_type
;
1229 drive
->gendev
.driver_data
= drive
;
1230 drive
->gendev
.release
= drive_release_dev
;
1231 if (drive
->present
) {
1232 device_register(&drive
->gendev
);
1233 sprintf(drive
->devfs_name
, "ide/host%d/bus%d/target%d/lun%d",
1234 (hwif
->channel
&& hwif
->mate
) ?
1235 hwif
->mate
->index
: hwif
->index
,
1236 hwif
->channel
, unit
, drive
->lun
);
1239 blk_register_region(MKDEV(hwif
->major
, 0), MAX_DRIVES
<< PARTN_BITS
,
1240 THIS_MODULE
, ata_probe
, ata_lock
, hwif
);
1243 static int hwif_init(ide_hwif_t
*hwif
)
1251 if (!(hwif
->irq
= ide_default_irq(hwif
->io_ports
[IDE_DATA_OFFSET
])))
1253 printk("%s: DISABLED, NO IRQ\n", hwif
->name
);
1254 return (hwif
->present
= 0);
1257 #ifdef CONFIG_BLK_DEV_HD
1258 if (hwif
->irq
== HD_IRQ
&& hwif
->io_ports
[IDE_DATA_OFFSET
] != HD_DATA
) {
1259 printk("%s: CANNOT SHARE IRQ WITH OLD "
1260 "HARDDISK DRIVER (hd.c)\n", hwif
->name
);
1261 return (hwif
->present
= 0);
1263 #endif /* CONFIG_BLK_DEV_HD */
1265 /* we set it back to 1 if all is ok below */
1268 if (register_blkdev(hwif
->major
, hwif
->name
))
1271 if (!hwif
->sg_max_nents
)
1272 hwif
->sg_max_nents
= PRD_ENTRIES
;
1274 hwif
->sg_table
= kmalloc(sizeof(struct scatterlist
)*hwif
->sg_max_nents
,
1276 if (!hwif
->sg_table
) {
1277 printk(KERN_ERR
"%s: unable to allocate SG table.\n", hwif
->name
);
1281 if (alloc_disks(hwif
) < 0)
1284 if (init_irq(hwif
) == 0)
1287 old_irq
= hwif
->irq
;
1289 * It failed to initialise. Find the default IRQ for
1290 * this port and try that.
1292 if (!(hwif
->irq
= ide_default_irq(hwif
->io_ports
[IDE_DATA_OFFSET
]))) {
1293 printk("%s: Disabled unable to get IRQ %d.\n",
1294 hwif
->name
, old_irq
);
1297 if (init_irq(hwif
)) {
1298 printk("%s: probed IRQ %d and default IRQ %d failed.\n",
1299 hwif
->name
, old_irq
, hwif
->irq
);
1302 printk("%s: probed IRQ %d failed, using default.\n",
1303 hwif
->name
, hwif
->irq
);
1307 hwif
->present
= 1; /* success */
1311 for (unit
= 0; unit
< MAX_DRIVES
; unit
++) {
1312 struct gendisk
*disk
= hwif
->drives
[unit
].disk
;
1313 hwif
->drives
[unit
].disk
= NULL
;
1317 unregister_blkdev(hwif
->major
, hwif
->name
);
1321 int ideprobe_init (void)
1324 int probe
[MAX_HWIFS
];
1326 memset(probe
, 0, MAX_HWIFS
* sizeof(int));
1327 for (index
= 0; index
< MAX_HWIFS
; ++index
)
1328 probe
[index
] = !ide_hwifs
[index
].present
;
1331 * Probe for drives in the usual way.. CMOS/BIOS, then poke at ports
1333 for (index
= 0; index
< MAX_HWIFS
; ++index
)
1335 probe_hwif(&ide_hwifs
[index
]);
1336 for (index
= 0; index
< MAX_HWIFS
; ++index
)
1338 hwif_init(&ide_hwifs
[index
]);
1339 for (index
= 0; index
< MAX_HWIFS
; ++index
) {
1341 ide_hwif_t
*hwif
= &ide_hwifs
[index
];
1345 if (hwif
->chipset
== ide_unknown
|| hwif
->chipset
== ide_forced
)
1346 hwif
->chipset
= ide_generic
;
1347 for (unit
= 0; unit
< MAX_DRIVES
; ++unit
)
1348 if (hwif
->drives
[unit
].present
)
1349 ata_attach(&hwif
->drives
[unit
]);
1355 EXPORT_SYMBOL_GPL(ideprobe_init
);