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 #ifdef CONFIG_IDEDISK_MULTI_MODE
93 if ((max_multsect
/ 2) > 1)
94 id
[ATA_ID_MULTSECT
] = max_multsect
| 0x100;
96 id
[ATA_ID_MULTSECT
] &= ~0x1ff;
98 drive
->mult_req
= id
[ATA_ID_MULTSECT
] & 0xff;
100 if ((id
[ATA_ID_MULTSECT
] & 0x100) &&
101 (id
[ATA_ID_MULTSECT
] & 0xff))
102 drive
->special
.b
.set_multmode
= 1;
107 * do_identify - identify a drive
108 * @drive: drive to identify
111 * Called when we have issued a drive identify command to
112 * read and parse the results. This function is run with
113 * interrupts disabled.
116 static inline void do_identify (ide_drive_t
*drive
, u8 cmd
)
118 ide_hwif_t
*hwif
= HWIF(drive
);
120 char *m
= (char *)&id
[ATA_ID_PROD
];
123 /* read 512 bytes of id info */
124 hwif
->tp_ops
->input_data(drive
, NULL
, id
, SECTOR_SIZE
);
129 printk(KERN_INFO
"%s: dumping identify data\n", drive
->name
);
130 ide_dump_identify((u8
*)id
);
135 * ATA_CMD_ID_ATA returns little-endian info,
136 * ATA_CMD_ID_ATAPI *usually* returns little-endian info.
138 if (cmd
== ATA_CMD_ID_ATAPI
) {
139 if ((m
[0] == 'N' && m
[1] == 'E') || /* NEC */
140 (m
[0] == 'F' && m
[1] == 'X') || /* Mitsumi */
141 (m
[0] == 'P' && m
[1] == 'i')) /* Pioneer */
142 /* Vertos drives may still be weird */
146 ide_fixstring(m
, ATA_ID_PROD_LEN
, bswap
);
147 ide_fixstring((char *)&id
[ATA_ID_FW_REV
], ATA_ID_FW_REV_LEN
, bswap
);
148 ide_fixstring((char *)&id
[ATA_ID_SERNO
], ATA_ID_SERNO_LEN
, bswap
);
150 /* we depend on this a lot! */
151 m
[ATA_ID_PROD_LEN
- 1] = '\0';
153 if (strstr(m
, "E X A B Y T E N E S T"))
156 printk(KERN_INFO
"%s: %s, ", drive
->name
, m
);
162 * Check for an ATAPI device
164 if (cmd
== ATA_CMD_ID_ATAPI
) {
165 u8 type
= (id
[ATA_ID_CONFIG
] >> 8) & 0x1f;
167 printk(KERN_CONT
"ATAPI ");
170 if (!strstr(m
, "CD-ROM")) {
171 if (!strstr(m
, "oppy") &&
172 !strstr(m
, "poyp") &&
174 printk(KERN_CONT
"cdrom or floppy?, assuming ");
175 if (drive
->media
!= ide_cdrom
) {
176 printk(KERN_CONT
"FLOPPY");
177 drive
->removable
= 1;
181 /* Early cdrom models used zero */
184 drive
->removable
= 1;
186 /* kludge for Apple PowerBook internal zip */
187 if (!strstr(m
, "CD-ROM") && strstr(m
, "ZIP")) {
188 printk(KERN_CONT
"FLOPPY");
193 printk(KERN_CONT
"CD/DVD-ROM");
196 printk(KERN_CONT
"TAPE");
199 printk(KERN_CONT
"OPTICAL");
200 drive
->removable
= 1;
203 printk(KERN_CONT
"UNKNOWN (type %d)", type
);
206 printk(KERN_CONT
" drive\n");
208 /* an ATAPI device ignores DRDY */
209 drive
->ready_stat
= 0;
214 * Not an ATAPI device: looks like a "regular" hard disk
218 * 0x848a = CompactFlash device
219 * These are *not* removable in Linux definition of the term
221 if (id
[ATA_ID_CONFIG
] != 0x848a && (id
[ATA_ID_CONFIG
] & (1 << 7)))
222 drive
->removable
= 1;
224 drive
->media
= ide_disk
;
226 printk(KERN_CONT
"%s DISK drive\n",
227 (id
[ATA_ID_CONFIG
] == 0x848a) ? "CFA" : "ATA");
238 * actual_try_to_identify - send ata/atapi identify
239 * @drive: drive to identify
240 * @cmd: command to use
242 * try_to_identify() sends an ATA(PI) IDENTIFY request to a drive
243 * and waits for a response. It also monitors irqs while this is
244 * happening, in hope of automatically determining which one is
245 * being used by the interface.
247 * Returns: 0 device was identified
248 * 1 device timed-out (no response to identify request)
249 * 2 device aborted the command (refused to identify itself)
252 static int actual_try_to_identify (ide_drive_t
*drive
, u8 cmd
)
254 ide_hwif_t
*hwif
= HWIF(drive
);
255 struct ide_io_ports
*io_ports
= &hwif
->io_ports
;
256 const struct ide_tp_ops
*tp_ops
= hwif
->tp_ops
;
257 int use_altstatus
= 0, rc
;
258 unsigned long timeout
;
261 /* take a deep breath */
264 if (io_ports
->ctl_addr
) {
265 a
= tp_ops
->read_altstatus(hwif
);
266 s
= tp_ops
->read_status(hwif
);
267 if ((a
^ s
) & ~ATA_IDX
)
268 /* ancient Seagate drives, broken interfaces */
269 printk(KERN_INFO
"%s: probing with STATUS(0x%02x) "
270 "instead of ALTSTATUS(0x%02x)\n",
273 /* use non-intrusive polling */
277 /* set features register for atapi
278 * identify command to be sure of reply
280 if (cmd
== ATA_CMD_ID_ATAPI
) {
283 memset(&task
, 0, sizeof(task
));
284 /* disable DMA & overlap */
285 task
.tf_flags
= IDE_TFLAG_OUT_FEATURE
;
287 tp_ops
->tf_load(drive
, &task
);
290 /* ask drive for ID */
291 tp_ops
->exec_command(hwif
, cmd
);
293 timeout
= ((cmd
== ATA_CMD_ID_ATA
) ? WAIT_WORSTCASE
: WAIT_PIDENTIFY
) / 2;
296 if (time_after(jiffies
, timeout
)) {
297 /* drive timed-out */
300 /* give drive a breather */
302 s
= use_altstatus
? tp_ops
->read_altstatus(hwif
)
303 : tp_ops
->read_status(hwif
);
304 } while (s
& ATA_BUSY
);
306 /* wait for IRQ and ATA_DRQ */
308 s
= tp_ops
->read_status(hwif
);
310 if (OK_STAT(s
, ATA_DRQ
, 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)tp_ops
->read_status(hwif
);
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
);
342 const struct ide_tp_ops
*tp_ops
= hwif
->tp_ops
;
345 unsigned long cookie
= 0;
348 * Disable device irq unless we need to
349 * probe for it. Otherwise we'll get spurious
350 * interrupts during the identify-phase that
351 * the irq handler isn't expecting.
353 if (hwif
->io_ports
.ctl_addr
) {
356 cookie
= probe_irq_on();
358 tp_ops
->set_irq(hwif
, autoprobe
);
361 retval
= actual_try_to_identify(drive
, cmd
);
366 tp_ops
->set_irq(hwif
, 0);
367 /* clear drive IRQ */
368 (void)tp_ops
->read_status(hwif
);
370 irq
= probe_irq_off(cookie
);
375 /* Mmmm.. multiple IRQs..
376 * don't know which was ours
378 printk(KERN_ERR
"%s: IRQ probe failed (0x%lx)\n",
379 drive
->name
, cookie
);
386 static int ide_busy_sleep(ide_hwif_t
*hwif
)
388 unsigned long timeout
= jiffies
+ WAIT_WORSTCASE
;
393 stat
= hwif
->tp_ops
->read_status(hwif
);
394 if ((stat
& ATA_BUSY
) == 0)
396 } while (time_before(jiffies
, timeout
));
401 static u8
ide_read_device(ide_drive_t
*drive
)
405 memset(&task
, 0, sizeof(task
));
406 task
.tf_flags
= IDE_TFLAG_IN_DEVICE
;
408 drive
->hwif
->tp_ops
->tf_read(drive
, &task
);
410 return task
.tf
.device
;
414 * do_probe - probe an IDE device
415 * @drive: drive to probe
416 * @cmd: command to use
418 * do_probe() has the difficult job of finding a drive if it exists,
419 * without getting hung up if it doesn't exist, without trampling on
420 * ethernet cards, and without leaving any IRQs dangling to haunt us later.
422 * If a drive is "known" to exist (from CMOS or kernel parameters),
423 * but does not respond right away, the probe will "hang in there"
424 * for the maximum wait time (about 30 seconds), otherwise it will
425 * exit much more quickly.
427 * Returns: 0 device was identified
428 * 1 device timed-out (no response to identify request)
429 * 2 device aborted the command (refused to identify itself)
430 * 3 bad status from device (possible for ATAPI drives)
431 * 4 probe was not attempted because failure was obvious
434 static int do_probe (ide_drive_t
*drive
, u8 cmd
)
436 ide_hwif_t
*hwif
= HWIF(drive
);
437 const struct ide_tp_ops
*tp_ops
= hwif
->tp_ops
;
441 if (drive
->present
) {
442 /* avoid waiting for inappropriate probes */
443 if (drive
->media
!= ide_disk
&& cmd
== ATA_CMD_ID_ATA
)
447 printk(KERN_INFO
"probing for %s: present=%d, media=%d, probetype=%s\n",
448 drive
->name
, drive
->present
, drive
->media
,
449 (cmd
== ATA_CMD_ID_ATA
) ? "ATA" : "ATAPI");
452 /* needed for some systems
453 * (e.g. crw9624 as drive0 with disk as slave)
459 if (ide_read_device(drive
) != drive
->select
.all
&& !drive
->present
) {
460 if (drive
->select
.b
.unit
!= 0) {
461 /* exit with drive0 selected */
462 SELECT_DRIVE(&hwif
->drives
[0]);
463 /* allow ATA_BUSY to assert & clear */
466 /* no i/f present: mmm.. this should be a 4 -ml */
470 stat
= tp_ops
->read_status(hwif
);
472 if (OK_STAT(stat
, ATA_DRDY
, ATA_BUSY
) ||
473 drive
->present
|| cmd
== ATA_CMD_ID_ATAPI
) {
474 /* send cmd and wait */
475 if ((rc
= try_to_identify(drive
, cmd
))) {
476 /* failed: try again */
477 rc
= try_to_identify(drive
,cmd
);
480 stat
= tp_ops
->read_status(hwif
);
482 if (stat
== (ATA_BUSY
| ATA_DRDY
))
485 if (rc
== 1 && cmd
== ATA_CMD_ID_ATAPI
) {
486 printk(KERN_ERR
"%s: no response (status = 0x%02x), "
487 "resetting drive\n", drive
->name
, stat
);
491 tp_ops
->exec_command(hwif
, ATA_CMD_DEV_RESET
);
492 (void)ide_busy_sleep(hwif
);
493 rc
= try_to_identify(drive
, cmd
);
496 /* ensure drive IRQ is clear */
497 stat
= tp_ops
->read_status(hwif
);
500 printk(KERN_ERR
"%s: no response (status = 0x%02x)\n",
503 /* not present or maybe ATAPI */
506 if (drive
->select
.b
.unit
!= 0) {
507 /* exit with drive0 selected */
508 SELECT_DRIVE(&hwif
->drives
[0]);
510 /* ensure drive irq is clear */
511 (void)tp_ops
->read_status(hwif
);
519 static void enable_nest (ide_drive_t
*drive
)
521 ide_hwif_t
*hwif
= HWIF(drive
);
522 const struct ide_tp_ops
*tp_ops
= hwif
->tp_ops
;
525 printk(KERN_INFO
"%s: enabling %s -- ",
526 hwif
->name
, (char *)&drive
->id
[ATA_ID_PROD
]);
530 tp_ops
->exec_command(hwif
, ATA_EXABYTE_ENABLE_NEST
);
532 if (ide_busy_sleep(hwif
)) {
533 printk(KERN_CONT
"failed (timeout)\n");
539 stat
= tp_ops
->read_status(hwif
);
541 if (!OK_STAT(stat
, 0, BAD_STAT
))
542 printk(KERN_CONT
"failed (status = 0x%02x)\n", stat
);
544 printk(KERN_CONT
"success\n");
546 /* if !(success||timed-out) */
547 if (do_probe(drive
, ATA_CMD_ID_ATA
) >= 2)
548 /* look for ATAPI device */
549 (void)do_probe(drive
, ATA_CMD_ID_ATAPI
);
553 * probe_for_drives - upper level drive probe
554 * @drive: drive to probe for
556 * probe_for_drive() tests for existence of a given drive using do_probe()
557 * and presents things to the user as needed.
559 * Returns: 0 no device was found
560 * 1 device was found (note: drive->present might
564 static inline u8
probe_for_drive (ide_drive_t
*drive
)
569 * In order to keep things simple we have an id
570 * block for all drives at all times. If the device
571 * is pre ATA or refuses ATA/ATAPI identify we
572 * will add faked data to this.
574 * Also note that 0 everywhere means "can't do X"
577 drive
->id
= kzalloc(SECTOR_WORDS
*4, GFP_KERNEL
);
579 if(drive
->id
== NULL
)
581 printk(KERN_ERR
"ide: out of memory for id data.\n");
585 m
= (char *)&drive
->id
[ATA_ID_PROD
];
586 strcpy(m
, "UNKNOWN");
591 /* if !(success||timed-out) */
592 if (do_probe(drive
, ATA_CMD_ID_ATA
) >= 2)
593 /* look for ATAPI device */
594 (void)do_probe(drive
, ATA_CMD_ID_ATAPI
);
596 /* drive not found */
599 if (strstr(m
, "E X A B Y T E N E S T"))
602 /* identification failed? */
603 if (!drive
->id_read
) {
604 if (drive
->media
== ide_disk
) {
605 printk(KERN_INFO
"%s: non-IDE drive, CHS=%d/%d/%d\n",
606 drive
->name
, drive
->cyl
,
607 drive
->head
, drive
->sect
);
608 } else if (drive
->media
== ide_cdrom
) {
609 printk(KERN_INFO
"%s: ATAPI cdrom (?)\n", drive
->name
);
612 printk(KERN_WARNING
"%s: Unknown device on bus refused identification. Ignoring.\n", drive
->name
);
616 /* drive was found */
620 /* The drive wasn't being helpful. Add generic info only */
621 if (drive
->id_read
== 0) {
626 if (drive
->media
== ide_disk
) {
627 ide_disk_init_chs(drive
);
628 ide_disk_init_mult_count(drive
);
631 return drive
->present
;
634 static void hwif_release_dev(struct device
*dev
)
636 ide_hwif_t
*hwif
= container_of(dev
, ide_hwif_t
, gendev
);
638 complete(&hwif
->gendev_rel_comp
);
641 static int ide_register_port(ide_hwif_t
*hwif
)
645 /* register with global device tree */
646 strlcpy(hwif
->gendev
.bus_id
,hwif
->name
,BUS_ID_SIZE
);
647 hwif
->gendev
.driver_data
= hwif
;
648 if (hwif
->gendev
.parent
== NULL
) {
650 hwif
->gendev
.parent
= hwif
->dev
;
652 /* Would like to do = &device_legacy */
653 hwif
->gendev
.parent
= NULL
;
655 hwif
->gendev
.release
= hwif_release_dev
;
656 ret
= device_register(&hwif
->gendev
);
658 printk(KERN_WARNING
"IDE: %s: device_register error: %d\n",
663 hwif
->portdev
= device_create_drvdata(ide_port_class
, &hwif
->gendev
,
664 MKDEV(0, 0), hwif
, hwif
->name
);
665 if (IS_ERR(hwif
->portdev
)) {
666 ret
= PTR_ERR(hwif
->portdev
);
667 device_unregister(&hwif
->gendev
);
674 * ide_port_wait_ready - wait for port to become ready
677 * This is needed on some PPCs and a bunch of BIOS-less embedded
678 * platforms. Typical cases are:
680 * - The firmware hard reset the disk before booting the kernel,
681 * the drive is still doing it's poweron-reset sequence, that
682 * can take up to 30 seconds.
684 * - The firmware does nothing (or no firmware), the device is
685 * still in POST state (same as above actually).
687 * - Some CD/DVD/Writer combo drives tend to drive the bus during
688 * their reset sequence even when they are non-selected slave
689 * devices, thus preventing discovery of the main HD.
691 * Doing this wait-for-non-busy should not harm any existing
692 * configuration and fix some issues like the above.
696 * Returns 0 on success, error code (< 0) otherwise.
699 static int ide_port_wait_ready(ide_hwif_t
*hwif
)
703 printk(KERN_DEBUG
"Probing IDE interface %s...\n", hwif
->name
);
705 /* Let HW settle down a bit from whatever init state we
709 /* Wait for BSY bit to go away, spec timeout is 30 seconds,
710 * I know of at least one disk who takes 31 seconds, I use 35
713 rc
= ide_wait_not_busy(hwif
, 35000);
717 /* Now make sure both master & slave are ready */
718 for (unit
= 0; unit
< MAX_DRIVES
; unit
++) {
719 ide_drive_t
*drive
= &hwif
->drives
[unit
];
721 /* Ignore disks that we will not probe for later. */
722 if (!drive
->noprobe
|| drive
->present
) {
724 hwif
->tp_ops
->set_irq(hwif
, 1);
726 rc
= ide_wait_not_busy(hwif
, 35000);
730 printk(KERN_DEBUG
"%s: ide_wait_not_busy() skipped\n",
734 /* Exit function with master reselected (let's be sane) */
736 SELECT_DRIVE(&hwif
->drives
[0]);
742 * ide_undecoded_slave - look for bad CF adapters
743 * @dev1: slave device
745 * Analyse the drives on the interface and attempt to decide if we
746 * have the same drive viewed twice. This occurs with crap CF adapters
747 * and PCMCIA sometimes.
750 void ide_undecoded_slave(ide_drive_t
*dev1
)
752 ide_drive_t
*dev0
= &dev1
->hwif
->drives
[0];
754 if ((dev1
->dn
& 1) == 0 || dev0
->present
== 0)
757 /* If the models don't match they are not the same product */
758 if (strcmp((char *)&dev0
->id
[ATA_ID_PROD
],
759 (char *)&dev1
->id
[ATA_ID_PROD
]))
762 /* Serial numbers do not match */
763 if (strncmp((char *)&dev0
->id
[ATA_ID_SERNO
],
764 (char *)&dev1
->id
[ATA_ID_SERNO
], ATA_ID_SERNO_LEN
))
767 /* No serial number, thankfully very rare for CF */
768 if (*(char *)&dev0
->id
[ATA_ID_SERNO
] == 0)
771 /* Appears to be an IDE flash adapter with decode bugs */
772 printk(KERN_WARNING
"ide-probe: ignoring undecoded slave\n");
777 EXPORT_SYMBOL_GPL(ide_undecoded_slave
);
779 static int ide_probe_port(ide_hwif_t
*hwif
)
783 int unit
, rc
= -ENODEV
;
785 BUG_ON(hwif
->present
);
787 if (hwif
->drives
[0].noprobe
&& hwif
->drives
[1].noprobe
)
791 * We must always disable IRQ, as probe_for_drive will assert IRQ, but
792 * we'll install our IRQ driver much later...
796 disable_irq(hwif
->irq
);
798 local_irq_set(flags
);
800 if (ide_port_wait_ready(hwif
) == -EBUSY
)
801 printk(KERN_DEBUG
"%s: Wait for ready failed before probe !\n", hwif
->name
);
804 * Second drive should only exist if first drive was found,
805 * but a lot of cdrom drives are configured as single slaves.
807 for (unit
= 0; unit
< MAX_DRIVES
; ++unit
) {
808 ide_drive_t
*drive
= &hwif
->drives
[unit
];
809 drive
->dn
= (hwif
->channel
? 2 : 0) + unit
;
810 (void) probe_for_drive(drive
);
815 local_irq_restore(flags
);
818 * Use cached IRQ number. It might be (and is...) changed by probe
827 static void ide_port_tune_devices(ide_hwif_t
*hwif
)
829 const struct ide_port_ops
*port_ops
= hwif
->port_ops
;
832 for (unit
= 0; unit
< MAX_DRIVES
; unit
++) {
833 ide_drive_t
*drive
= &hwif
->drives
[unit
];
835 if (drive
->present
&& port_ops
&& port_ops
->quirkproc
)
836 port_ops
->quirkproc(drive
);
839 for (unit
= 0; unit
< MAX_DRIVES
; ++unit
) {
840 ide_drive_t
*drive
= &hwif
->drives
[unit
];
842 if (drive
->present
) {
843 ide_set_max_pio(drive
);
852 for (unit
= 0; unit
< MAX_DRIVES
; ++unit
) {
853 ide_drive_t
*drive
= &hwif
->drives
[unit
];
855 if (hwif
->host_flags
& IDE_HFLAG_NO_IO_32BIT
)
856 drive
->no_io_32bit
= 1;
858 drive
->no_io_32bit
= drive
->id
[ATA_ID_DWORD_IO
] ? 1 : 0;
864 * save_match() is used to simplify logic in init_irq() below.
866 * A loophole here is that we may not know about a particular
867 * hwif's irq until after that hwif is actually probed/initialized..
868 * This could be a problem for the case where an hwif is on a
869 * dual interface that requires serialization (eg. cmd640) and another
870 * hwif using one of the same irqs is initialized beforehand.
872 * This routine detects and reports such situations, but does not fix them.
874 static void save_match(ide_hwif_t
*hwif
, ide_hwif_t
*new, ide_hwif_t
**match
)
876 ide_hwif_t
*m
= *match
;
878 if (m
&& m
->hwgroup
&& m
->hwgroup
!= new->hwgroup
) {
881 printk(KERN_WARNING
"%s: potential IRQ problem with %s and %s\n",
882 hwif
->name
, new->name
, m
->name
);
884 if (!m
|| m
->irq
!= hwif
->irq
) /* don't undo a prior perfect match */
887 #endif /* MAX_HWIFS > 1 */
892 static int ide_init_queue(ide_drive_t
*drive
)
894 struct request_queue
*q
;
895 ide_hwif_t
*hwif
= HWIF(drive
);
896 int max_sectors
= 256;
897 int max_sg_entries
= PRD_ENTRIES
;
900 * Our default set up assumes the normal IDE case,
901 * that is 64K segmenting, standard PRD setup
902 * and LBA28. Some drivers then impose their own
903 * limits and LBA48 we could raise it but as yet
907 q
= blk_init_queue_node(do_ide_request
, &ide_lock
, hwif_to_node(hwif
));
911 q
->queuedata
= drive
;
912 blk_queue_segment_boundary(q
, 0xffff);
914 if (hwif
->rqsize
< max_sectors
)
915 max_sectors
= hwif
->rqsize
;
916 blk_queue_max_sectors(q
, max_sectors
);
919 /* When we have an IOMMU, we may have a problem where pci_map_sg()
920 * creates segments that don't completely match our boundary
921 * requirements and thus need to be broken up again. Because it
922 * doesn't align properly either, we may actually have to break up
923 * to more segments than what was we got in the first place, a max
924 * worst case is twice as many.
925 * This will be fixed once we teach pci_map_sg() about our boundary
926 * requirements, hopefully soon. *FIXME*
928 if (!PCI_DMA_BUS_IS_PHYS
)
929 max_sg_entries
>>= 1;
930 #endif /* CONFIG_PCI */
932 blk_queue_max_hw_segments(q
, max_sg_entries
);
933 blk_queue_max_phys_segments(q
, max_sg_entries
);
935 /* assign drive queue */
938 /* needs drive->queue to be set */
939 ide_toggle_bounce(drive
, 1);
944 static void ide_add_drive_to_hwgroup(ide_drive_t
*drive
)
946 ide_hwgroup_t
*hwgroup
= drive
->hwif
->hwgroup
;
948 spin_lock_irq(&ide_lock
);
949 if (!hwgroup
->drive
) {
950 /* first drive for hwgroup. */
952 hwgroup
->drive
= drive
;
953 hwgroup
->hwif
= HWIF(hwgroup
->drive
);
955 drive
->next
= hwgroup
->drive
->next
;
956 hwgroup
->drive
->next
= drive
;
958 spin_unlock_irq(&ide_lock
);
962 * For any present drive:
963 * - allocate the block device queue
964 * - link drive into the hwgroup
966 static void ide_port_setup_devices(ide_hwif_t
*hwif
)
970 mutex_lock(&ide_cfg_mtx
);
971 for (i
= 0; i
< MAX_DRIVES
; i
++) {
972 ide_drive_t
*drive
= &hwif
->drives
[i
];
977 if (ide_init_queue(drive
)) {
978 printk(KERN_ERR
"ide: failed to init %s\n",
983 ide_add_drive_to_hwgroup(drive
);
985 mutex_unlock(&ide_cfg_mtx
);
988 static ide_hwif_t
*ide_ports
[MAX_HWIFS
];
990 void ide_remove_port_from_hwgroup(ide_hwif_t
*hwif
)
992 ide_hwgroup_t
*hwgroup
= hwif
->hwgroup
;
994 ide_ports
[hwif
->index
] = NULL
;
996 spin_lock_irq(&ide_lock
);
998 * Remove us from the hwgroup, and free
999 * the hwgroup if we were the only member
1001 if (hwif
->next
== hwif
) {
1002 BUG_ON(hwgroup
->hwif
!= hwif
);
1005 /* There is another interface in hwgroup.
1006 * Unlink us, and set hwgroup->drive and ->hwif to
1009 ide_hwif_t
*g
= hwgroup
->hwif
;
1011 while (g
->next
!= hwif
)
1013 g
->next
= hwif
->next
;
1014 if (hwgroup
->hwif
== hwif
) {
1015 /* Chose a random hwif for hwgroup->hwif.
1016 * It's guaranteed that there are no drives
1017 * left in the hwgroup.
1019 BUG_ON(hwgroup
->drive
!= NULL
);
1022 BUG_ON(hwgroup
->hwif
== hwif
);
1024 spin_unlock_irq(&ide_lock
);
1028 * This routine sets up the irq for an ide interface, and creates a new
1029 * hwgroup for the irq/hwif if none was previously assigned.
1031 * Much of the code is for correctly detecting/handling irq sharing
1032 * and irq serialization situations. This is somewhat complex because
1033 * it handles static as well as dynamic (PCMCIA) IDE interfaces.
1035 static int init_irq (ide_hwif_t
*hwif
)
1037 struct ide_io_ports
*io_ports
= &hwif
->io_ports
;
1039 ide_hwgroup_t
*hwgroup
;
1040 ide_hwif_t
*match
= NULL
;
1043 BUG_ON(in_interrupt());
1044 BUG_ON(irqs_disabled());
1045 BUG_ON(hwif
== NULL
);
1047 mutex_lock(&ide_cfg_mtx
);
1048 hwif
->hwgroup
= NULL
;
1051 * Group up with any other hwifs that share our irq(s).
1053 for (index
= 0; index
< MAX_HWIFS
; index
++) {
1054 ide_hwif_t
*h
= ide_ports
[index
];
1056 if (h
&& h
->hwgroup
) { /* scan only initialized ports */
1057 if (hwif
->irq
== h
->irq
) {
1058 hwif
->sharing_irq
= h
->sharing_irq
= 1;
1059 if (hwif
->chipset
!= ide_pci
||
1060 h
->chipset
!= ide_pci
) {
1061 save_match(hwif
, h
, &match
);
1064 if (hwif
->serialized
) {
1065 if (hwif
->mate
&& hwif
->mate
->irq
== h
->irq
)
1066 save_match(hwif
, h
, &match
);
1068 if (h
->serialized
) {
1069 if (h
->mate
&& hwif
->irq
== h
->mate
->irq
)
1070 save_match(hwif
, h
, &match
);
1074 #endif /* MAX_HWIFS > 1 */
1076 * If we are still without a hwgroup, then form a new one
1079 hwgroup
= match
->hwgroup
;
1080 hwif
->hwgroup
= hwgroup
;
1082 * Link us into the hwgroup.
1083 * This must be done early, do ensure that unexpected_intr
1084 * can find the hwif and prevent irq storms.
1085 * No drives are attached to the new hwif, choose_drive
1086 * can't do anything stupid (yet).
1087 * Add ourself as the 2nd entry to the hwgroup->hwif
1088 * linked list, the first entry is the hwif that owns
1089 * hwgroup->handler - do not change that.
1091 spin_lock_irq(&ide_lock
);
1092 hwif
->next
= hwgroup
->hwif
->next
;
1093 hwgroup
->hwif
->next
= hwif
;
1094 BUG_ON(hwif
->next
== hwif
);
1095 spin_unlock_irq(&ide_lock
);
1097 hwgroup
= kmalloc_node(sizeof(*hwgroup
), GFP_KERNEL
|__GFP_ZERO
,
1098 hwif_to_node(hwif
));
1099 if (hwgroup
== NULL
)
1102 hwif
->hwgroup
= hwgroup
;
1103 hwgroup
->hwif
= hwif
->next
= hwif
;
1105 init_timer(&hwgroup
->timer
);
1106 hwgroup
->timer
.function
= &ide_timer_expiry
;
1107 hwgroup
->timer
.data
= (unsigned long) hwgroup
;
1110 ide_ports
[hwif
->index
] = hwif
;
1113 * Allocate the irq, if not already obtained for another hwif
1115 if (!match
|| match
->irq
!= hwif
->irq
) {
1117 #if defined(__mc68000__)
1119 #endif /* __mc68000__ */
1121 if (IDE_CHIPSET_IS_PCI(hwif
->chipset
))
1124 if (io_ports
->ctl_addr
)
1125 hwif
->tp_ops
->set_irq(hwif
, 1);
1127 if (request_irq(hwif
->irq
,&ide_intr
,sa
,hwif
->name
,hwgroup
))
1131 if (!hwif
->rqsize
) {
1132 if ((hwif
->host_flags
& IDE_HFLAG_NO_LBA48
) ||
1133 (hwif
->host_flags
& IDE_HFLAG_NO_LBA48_DMA
))
1136 hwif
->rqsize
= 65536;
1139 #if !defined(__mc68000__)
1140 printk(KERN_INFO
"%s at 0x%03lx-0x%03lx,0x%03lx on irq %d", hwif
->name
,
1141 io_ports
->data_addr
, io_ports
->status_addr
,
1142 io_ports
->ctl_addr
, hwif
->irq
);
1144 printk(KERN_INFO
"%s at 0x%08lx on irq %d", hwif
->name
,
1145 io_ports
->data_addr
, hwif
->irq
);
1146 #endif /* __mc68000__ */
1148 printk(KERN_CONT
" (%sed with %s)",
1149 hwif
->sharing_irq
? "shar" : "serializ", match
->name
);
1150 printk(KERN_CONT
"\n");
1152 mutex_unlock(&ide_cfg_mtx
);
1155 ide_remove_port_from_hwgroup(hwif
);
1157 mutex_unlock(&ide_cfg_mtx
);
1161 static int ata_lock(dev_t dev
, void *data
)
1163 /* FIXME: we want to pin hwif down */
1167 static struct kobject
*ata_probe(dev_t dev
, int *part
, void *data
)
1169 ide_hwif_t
*hwif
= data
;
1170 int unit
= *part
>> PARTN_BITS
;
1171 ide_drive_t
*drive
= &hwif
->drives
[unit
];
1172 if (!drive
->present
)
1175 if (drive
->media
== ide_disk
)
1176 request_module("ide-disk");
1178 request_module("ide-scsi");
1179 if (drive
->media
== ide_cdrom
|| drive
->media
== ide_optical
)
1180 request_module("ide-cd");
1181 if (drive
->media
== ide_tape
)
1182 request_module("ide-tape");
1183 if (drive
->media
== ide_floppy
)
1184 request_module("ide-floppy");
1189 static struct kobject
*exact_match(dev_t dev
, int *part
, void *data
)
1191 struct gendisk
*p
= data
;
1192 *part
&= (1 << PARTN_BITS
) - 1;
1193 return &disk_to_dev(p
)->kobj
;
1196 static int exact_lock(dev_t dev
, void *data
)
1198 struct gendisk
*p
= data
;
1205 void ide_register_region(struct gendisk
*disk
)
1207 blk_register_region(MKDEV(disk
->major
, disk
->first_minor
),
1208 disk
->minors
, NULL
, exact_match
, exact_lock
, disk
);
1211 EXPORT_SYMBOL_GPL(ide_register_region
);
1213 void ide_unregister_region(struct gendisk
*disk
)
1215 blk_unregister_region(MKDEV(disk
->major
, disk
->first_minor
),
1219 EXPORT_SYMBOL_GPL(ide_unregister_region
);
1221 void ide_init_disk(struct gendisk
*disk
, ide_drive_t
*drive
)
1223 ide_hwif_t
*hwif
= drive
->hwif
;
1224 unsigned int unit
= (drive
->select
.all
>> 4) & 1;
1226 disk
->major
= hwif
->major
;
1227 disk
->first_minor
= unit
<< PARTN_BITS
;
1228 sprintf(disk
->disk_name
, "hd%c", 'a' + hwif
->index
* MAX_DRIVES
+ unit
);
1229 disk
->queue
= drive
->queue
;
1232 EXPORT_SYMBOL_GPL(ide_init_disk
);
1234 static void ide_remove_drive_from_hwgroup(ide_drive_t
*drive
)
1236 ide_hwgroup_t
*hwgroup
= drive
->hwif
->hwgroup
;
1238 if (drive
== drive
->next
) {
1239 /* special case: last drive from hwgroup. */
1240 BUG_ON(hwgroup
->drive
!= drive
);
1241 hwgroup
->drive
= NULL
;
1245 walk
= hwgroup
->drive
;
1246 while (walk
->next
!= drive
)
1248 walk
->next
= drive
->next
;
1249 if (hwgroup
->drive
== drive
) {
1250 hwgroup
->drive
= drive
->next
;
1251 hwgroup
->hwif
= hwgroup
->drive
->hwif
;
1254 BUG_ON(hwgroup
->drive
== drive
);
1257 static void drive_release_dev (struct device
*dev
)
1259 ide_drive_t
*drive
= container_of(dev
, ide_drive_t
, gendev
);
1261 ide_proc_unregister_device(drive
);
1263 spin_lock_irq(&ide_lock
);
1264 ide_remove_drive_from_hwgroup(drive
);
1268 /* Messed up locking ... */
1269 spin_unlock_irq(&ide_lock
);
1270 blk_cleanup_queue(drive
->queue
);
1271 spin_lock_irq(&ide_lock
);
1272 drive
->queue
= NULL
;
1273 spin_unlock_irq(&ide_lock
);
1275 complete(&drive
->gendev_rel_comp
);
1278 static int hwif_init(ide_hwif_t
*hwif
)
1283 hwif
->irq
= __ide_default_irq(hwif
->io_ports
.data_addr
);
1285 printk(KERN_ERR
"%s: disabled, no IRQ\n", hwif
->name
);
1290 if (register_blkdev(hwif
->major
, hwif
->name
))
1293 if (!hwif
->sg_max_nents
)
1294 hwif
->sg_max_nents
= PRD_ENTRIES
;
1296 hwif
->sg_table
= kmalloc(sizeof(struct scatterlist
)*hwif
->sg_max_nents
,
1298 if (!hwif
->sg_table
) {
1299 printk(KERN_ERR
"%s: unable to allocate SG table.\n", hwif
->name
);
1303 sg_init_table(hwif
->sg_table
, hwif
->sg_max_nents
);
1305 if (init_irq(hwif
) == 0)
1308 old_irq
= hwif
->irq
;
1310 * It failed to initialise. Find the default IRQ for
1311 * this port and try that.
1313 hwif
->irq
= __ide_default_irq(hwif
->io_ports
.data_addr
);
1315 printk(KERN_ERR
"%s: disabled, unable to get IRQ %d\n",
1316 hwif
->name
, old_irq
);
1319 if (init_irq(hwif
)) {
1320 printk(KERN_ERR
"%s: probed IRQ %d and default IRQ %d failed\n",
1321 hwif
->name
, old_irq
, hwif
->irq
);
1324 printk(KERN_WARNING
"%s: probed IRQ %d failed, using default\n",
1325 hwif
->name
, hwif
->irq
);
1328 blk_register_region(MKDEV(hwif
->major
, 0), MAX_DRIVES
<< PARTN_BITS
,
1329 THIS_MODULE
, ata_probe
, ata_lock
, hwif
);
1333 unregister_blkdev(hwif
->major
, hwif
->name
);
1337 static void hwif_register_devices(ide_hwif_t
*hwif
)
1341 for (i
= 0; i
< MAX_DRIVES
; i
++) {
1342 ide_drive_t
*drive
= &hwif
->drives
[i
];
1343 struct device
*dev
= &drive
->gendev
;
1346 if (!drive
->present
)
1349 ide_add_generic_settings(drive
);
1351 snprintf(dev
->bus_id
, BUS_ID_SIZE
, "%u.%u", hwif
->index
, i
);
1352 dev
->parent
= &hwif
->gendev
;
1353 dev
->bus
= &ide_bus_type
;
1354 dev
->driver_data
= drive
;
1355 dev
->release
= drive_release_dev
;
1357 ret
= device_register(dev
);
1359 printk(KERN_WARNING
"IDE: %s: device_register error: "
1360 "%d\n", __func__
, ret
);
1364 static void ide_port_init_devices(ide_hwif_t
*hwif
)
1366 const struct ide_port_ops
*port_ops
= hwif
->port_ops
;
1369 for (i
= 0; i
< MAX_DRIVES
; i
++) {
1370 ide_drive_t
*drive
= &hwif
->drives
[i
];
1372 if (hwif
->host_flags
& IDE_HFLAG_IO_32BIT
)
1373 drive
->io_32bit
= 1;
1374 if (hwif
->host_flags
& IDE_HFLAG_UNMASK_IRQS
)
1376 if (hwif
->host_flags
& IDE_HFLAG_NO_UNMASK_IRQS
)
1377 drive
->no_unmask
= 1;
1379 if (port_ops
&& port_ops
->init_dev
)
1380 port_ops
->init_dev(drive
);
1384 static void ide_init_port(ide_hwif_t
*hwif
, unsigned int port
,
1385 const struct ide_port_info
*d
)
1387 hwif
->channel
= port
;
1390 hwif
->chipset
= d
->chipset
;
1395 if ((!hwif
->irq
&& (d
->host_flags
& IDE_HFLAG_LEGACY_IRQS
)) ||
1396 (d
->host_flags
& IDE_HFLAG_FORCE_LEGACY_IRQS
))
1397 hwif
->irq
= port
? 15 : 14;
1399 /* ->host_flags may be set by ->init_iops (or even earlier...) */
1400 hwif
->host_flags
|= d
->host_flags
;
1401 hwif
->pio_mask
= d
->pio_mask
;
1404 hwif
->tp_ops
= d
->tp_ops
;
1406 /* ->set_pio_mode for DTC2278 is currently limited to port 0 */
1407 if (hwif
->chipset
!= ide_dtc2278
|| hwif
->channel
== 0)
1408 hwif
->port_ops
= d
->port_ops
;
1410 hwif
->swdma_mask
= d
->swdma_mask
;
1411 hwif
->mwdma_mask
= d
->mwdma_mask
;
1412 hwif
->ultra_mask
= d
->udma_mask
;
1414 if ((d
->host_flags
& IDE_HFLAG_NO_DMA
) == 0) {
1418 rc
= d
->init_dma(hwif
, d
);
1420 rc
= ide_hwif_setup_dma(hwif
, d
);
1423 printk(KERN_INFO
"%s: DMA disabled\n", hwif
->name
);
1425 hwif
->swdma_mask
= 0;
1426 hwif
->mwdma_mask
= 0;
1427 hwif
->ultra_mask
= 0;
1428 } else if (d
->dma_ops
)
1429 hwif
->dma_ops
= d
->dma_ops
;
1432 if ((d
->host_flags
& IDE_HFLAG_SERIALIZE
) ||
1433 ((d
->host_flags
& IDE_HFLAG_SERIALIZE_DMA
) && hwif
->dma_base
)) {
1435 hwif
->mate
->serialized
= hwif
->serialized
= 1;
1438 if (d
->host_flags
& IDE_HFLAG_RQSIZE_256
)
1441 /* call chipset specific routine for each enabled port */
1446 static void ide_port_cable_detect(ide_hwif_t
*hwif
)
1448 const struct ide_port_ops
*port_ops
= hwif
->port_ops
;
1450 if (port_ops
&& port_ops
->cable_detect
&& (hwif
->ultra_mask
& 0x78)) {
1451 if (hwif
->cbl
!= ATA_CBL_PATA40_SHORT
)
1452 hwif
->cbl
= port_ops
->cable_detect(hwif
);
1456 static ssize_t
store_delete_devices(struct device
*portdev
,
1457 struct device_attribute
*attr
,
1458 const char *buf
, size_t n
)
1460 ide_hwif_t
*hwif
= dev_get_drvdata(portdev
);
1462 if (strncmp(buf
, "1", n
))
1465 ide_port_unregister_devices(hwif
);
1470 static DEVICE_ATTR(delete_devices
, S_IWUSR
, NULL
, store_delete_devices
);
1472 static ssize_t
store_scan(struct device
*portdev
,
1473 struct device_attribute
*attr
,
1474 const char *buf
, size_t n
)
1476 ide_hwif_t
*hwif
= dev_get_drvdata(portdev
);
1478 if (strncmp(buf
, "1", n
))
1481 ide_port_unregister_devices(hwif
);
1482 ide_port_scan(hwif
);
1487 static DEVICE_ATTR(scan
, S_IWUSR
, NULL
, store_scan
);
1489 static struct device_attribute
*ide_port_attrs
[] = {
1490 &dev_attr_delete_devices
,
1495 static int ide_sysfs_register_port(ide_hwif_t
*hwif
)
1497 int i
, uninitialized_var(rc
);
1499 for (i
= 0; ide_port_attrs
[i
]; i
++) {
1500 rc
= device_create_file(hwif
->portdev
, ide_port_attrs
[i
]);
1508 static unsigned int ide_indexes
;
1511 * ide_find_port_slot - find free port slot
1514 * Return the new port slot index or -ENOENT if we are out of free slots.
1517 static int ide_find_port_slot(const struct ide_port_info
*d
)
1520 u8 bootable
= (d
&& (d
->host_flags
& IDE_HFLAG_NON_BOOTABLE
)) ? 0 : 1;
1521 u8 i
= (d
&& (d
->host_flags
& IDE_HFLAG_QD_2ND_PORT
)) ? 1 : 0;;
1524 * Claim an unassigned slot.
1526 * Give preference to claiming other slots before claiming ide0/ide1,
1527 * just in case there's another interface yet-to-be-scanned
1528 * which uses ports 0x1f0/0x170 (the ide0/ide1 defaults).
1530 * Unless there is a bootable card that does not use the standard
1531 * ports 0x1f0/0x170 (the ide0/ide1 defaults).
1533 mutex_lock(&ide_cfg_mtx
);
1534 if (MAX_HWIFS
== 1) {
1535 if (ide_indexes
== 0 && i
== 0)
1539 if ((ide_indexes
| i
) != (1 << MAX_HWIFS
) - 1)
1540 idx
= ffz(ide_indexes
| i
);
1542 if ((ide_indexes
| 3) != (1 << MAX_HWIFS
) - 1)
1543 idx
= ffz(ide_indexes
| 3);
1544 else if ((ide_indexes
& 3) != 3)
1545 idx
= ffz(ide_indexes
);
1549 ide_indexes
|= (1 << idx
);
1550 mutex_unlock(&ide_cfg_mtx
);
1555 static void ide_free_port_slot(int idx
)
1557 mutex_lock(&ide_cfg_mtx
);
1558 ide_indexes
&= ~(1 << idx
);
1559 mutex_unlock(&ide_cfg_mtx
);
1562 struct ide_host
*ide_host_alloc_all(const struct ide_port_info
*d
,
1565 struct ide_host
*host
;
1568 host
= kzalloc(sizeof(*host
), GFP_KERNEL
);
1572 for (i
= 0; i
< MAX_HWIFS
; i
++) {
1579 hwif
= kzalloc(sizeof(*hwif
), GFP_KERNEL
);
1583 idx
= ide_find_port_slot(d
);
1585 printk(KERN_ERR
"%s: no free slot for interface\n",
1586 d
? d
->name
: "ide");
1591 ide_init_port_data(hwif
, idx
);
1595 host
->ports
[i
] = hwif
;
1599 if (host
->n_ports
== 0) {
1605 host
->dev
[0] = hws
[0]->dev
;
1608 host
->host_flags
= d
->host_flags
;
1612 EXPORT_SYMBOL_GPL(ide_host_alloc_all
);
1614 struct ide_host
*ide_host_alloc(const struct ide_port_info
*d
, hw_regs_t
**hws
)
1616 hw_regs_t
*hws_all
[MAX_HWIFS
];
1619 for (i
= 0; i
< MAX_HWIFS
; i
++)
1620 hws_all
[i
] = (i
< 4) ? hws
[i
] : NULL
;
1622 return ide_host_alloc_all(d
, hws_all
);
1624 EXPORT_SYMBOL_GPL(ide_host_alloc
);
1626 int ide_host_register(struct ide_host
*host
, const struct ide_port_info
*d
,
1629 ide_hwif_t
*hwif
, *mate
= NULL
;
1632 for (i
= 0; i
< MAX_HWIFS
; i
++) {
1633 hwif
= host
->ports
[i
];
1640 ide_init_port_hw(hwif
, hws
[i
]);
1641 ide_port_apply_params(hwif
);
1648 if ((i
& 1) && mate
) {
1653 mate
= (i
& 1) ? NULL
: hwif
;
1655 ide_init_port(hwif
, i
& 1, d
);
1656 ide_port_cable_detect(hwif
);
1657 ide_port_init_devices(hwif
);
1660 for (i
= 0; i
< MAX_HWIFS
; i
++) {
1661 hwif
= host
->ports
[i
];
1666 if (ide_probe_port(hwif
) == 0)
1669 if (hwif
->chipset
!= ide_4drives
|| !hwif
->mate
||
1670 !hwif
->mate
->present
)
1671 ide_register_port(hwif
);
1674 ide_port_tune_devices(hwif
);
1677 for (i
= 0; i
< MAX_HWIFS
; i
++) {
1678 hwif
= host
->ports
[i
];
1683 if (hwif_init(hwif
) == 0) {
1684 printk(KERN_INFO
"%s: failed to initialize IDE "
1685 "interface\n", hwif
->name
);
1693 ide_port_setup_devices(hwif
);
1695 ide_acpi_init(hwif
);
1698 ide_acpi_port_init_devices(hwif
);
1701 for (i
= 0; i
< MAX_HWIFS
; i
++) {
1702 hwif
= host
->ports
[i
];
1707 if (hwif
->chipset
== ide_unknown
)
1708 hwif
->chipset
= ide_generic
;
1711 hwif_register_devices(hwif
);
1714 for (i
= 0; i
< MAX_HWIFS
; i
++) {
1715 hwif
= host
->ports
[i
];
1720 ide_sysfs_register_port(hwif
);
1721 ide_proc_register_port(hwif
);
1724 ide_proc_port_register_devices(hwif
);
1729 EXPORT_SYMBOL_GPL(ide_host_register
);
1731 int ide_host_add(const struct ide_port_info
*d
, hw_regs_t
**hws
,
1732 struct ide_host
**hostp
)
1734 struct ide_host
*host
;
1737 host
= ide_host_alloc(d
, hws
);
1741 rc
= ide_host_register(host
, d
, hws
);
1743 ide_host_free(host
);
1752 EXPORT_SYMBOL_GPL(ide_host_add
);
1754 void ide_host_free(struct ide_host
*host
)
1759 for (i
= 0; i
< MAX_HWIFS
; i
++) {
1760 hwif
= host
->ports
[i
];
1765 ide_free_port_slot(hwif
->index
);
1771 EXPORT_SYMBOL_GPL(ide_host_free
);
1773 void ide_host_remove(struct ide_host
*host
)
1777 for (i
= 0; i
< MAX_HWIFS
; i
++) {
1779 ide_unregister(host
->ports
[i
]);
1782 ide_host_free(host
);
1784 EXPORT_SYMBOL_GPL(ide_host_remove
);
1786 void ide_port_scan(ide_hwif_t
*hwif
)
1788 ide_port_apply_params(hwif
);
1789 ide_port_cable_detect(hwif
);
1790 ide_port_init_devices(hwif
);
1792 if (ide_probe_port(hwif
) < 0)
1797 ide_port_tune_devices(hwif
);
1798 ide_acpi_port_init_devices(hwif
);
1799 ide_port_setup_devices(hwif
);
1800 hwif_register_devices(hwif
);
1801 ide_proc_port_register_devices(hwif
);
1803 EXPORT_SYMBOL_GPL(ide_port_scan
);
1805 static void ide_legacy_init_one(hw_regs_t
**hws
, hw_regs_t
*hw
,
1806 u8 port_no
, const struct ide_port_info
*d
,
1807 unsigned long config
)
1809 unsigned long base
, ctl
;
1822 if (!request_region(base
, 8, d
->name
)) {
1823 printk(KERN_ERR
"%s: I/O resource 0x%lX-0x%lX not free.\n",
1824 d
->name
, base
, base
+ 7);
1828 if (!request_region(ctl
, 1, d
->name
)) {
1829 printk(KERN_ERR
"%s: I/O resource 0x%lX not free.\n",
1831 release_region(base
, 8);
1835 ide_std_init_ports(hw
, base
, ctl
);
1837 hw
->chipset
= d
->chipset
;
1838 hw
->config
= config
;
1843 int ide_legacy_device_add(const struct ide_port_info
*d
, unsigned long config
)
1845 hw_regs_t hw
[2], *hws
[] = { NULL
, NULL
, NULL
, NULL
};
1847 memset(&hw
, 0, sizeof(hw
));
1849 if ((d
->host_flags
& IDE_HFLAG_QD_2ND_PORT
) == 0)
1850 ide_legacy_init_one(hws
, &hw
[0], 0, d
, config
);
1851 ide_legacy_init_one(hws
, &hw
[1], 1, d
, config
);
1853 if (hws
[0] == NULL
&& hws
[1] == NULL
&&
1854 (d
->host_flags
& IDE_HFLAG_SINGLE
))
1857 return ide_host_add(d
, hws
, NULL
);
1859 EXPORT_SYMBOL_GPL(ide_legacy_device_add
);