2 * Copyright (C) 1994-1998 Linus Torvalds & authors (see below)
3 * Copyrifht (C) 2003-2005, 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 multiple IDE interface driver, as evolved from hd.c.
14 * It supports up to MAX_HWIFS IDE interfaces, on one or more IRQs
16 * There can be up to two drives per interface, as per the ATA-2 spec.
22 * | It traverses the request-list, using interrupts to jump between functions.
23 * | As nearly all functions can be called within interrupts, we may not sleep.
24 * | Special care is recommended. Have Fun!
26 * | modified by Drew Eckhardt to check nr of hd's from the CMOS.
28 * | Thanks to Branko Lankester, lankeste@fwi.uva.nl, who found a bug
29 * | in the early extended-partition checks and added DM partitions.
31 * | Early work on error handling by Mika Liljeberg (liljeber@cs.Helsinki.FI).
33 * | IRQ-unmask, drive-id, multiple-mode, support for ">16 heads",
34 * | and general streamlining by Mark Lord (mlord@pobox.com).
36 * October, 1994 -- Complete line-by-line overhaul for linux 1.1.x, by:
38 * Mark Lord (mlord@pobox.com) (IDE Perf.Pkg)
39 * Delman Lee (delman@ieee.org) ("Mr. atdisk2")
40 * Scott Snyder (snyder@fnald0.fnal.gov) (ATAPI IDE cd-rom)
42 * This was a rewrite of just about everything from hd.c, though some original
43 * code is still sprinkled about. Think of it as a major evolution, with
44 * inspiration from lots of linux users, esp. hamish@zot.apana.org.au
47 #define _IDE_C /* Tell ide.h it's really us */
49 #include <linux/module.h>
50 #include <linux/types.h>
51 #include <linux/string.h>
52 #include <linux/kernel.h>
53 #include <linux/timer.h>
55 #include <linux/interrupt.h>
56 #include <linux/major.h>
57 #include <linux/errno.h>
58 #include <linux/genhd.h>
59 #include <linux/blkpg.h>
60 #include <linux/slab.h>
61 #include <linux/init.h>
62 #include <linux/pci.h>
63 #include <linux/delay.h>
64 #include <linux/ide.h>
65 #include <linux/completion.h>
66 #include <linux/reboot.h>
67 #include <linux/cdrom.h>
68 #include <linux/seq_file.h>
69 #include <linux/device.h>
70 #include <linux/bitops.h>
72 #include <asm/byteorder.h>
74 #include <asm/uaccess.h>
78 /* default maximum number of failures */
79 #define IDE_DEFAULT_MAX_FAILURES 1
81 struct class *ide_port_class
;
83 static const u8 ide_hwif_to_major
[] = { IDE0_MAJOR
, IDE1_MAJOR
,
84 IDE2_MAJOR
, IDE3_MAJOR
,
85 IDE4_MAJOR
, IDE5_MAJOR
,
86 IDE6_MAJOR
, IDE7_MAJOR
,
87 IDE8_MAJOR
, IDE9_MAJOR
};
89 DEFINE_MUTEX(ide_cfg_mtx
);
91 __cacheline_aligned_in_smp
DEFINE_SPINLOCK(ide_lock
);
92 EXPORT_SYMBOL(ide_lock
);
94 ide_hwif_t ide_hwifs
[MAX_HWIFS
]; /* master data repository */
96 static void ide_port_init_devices_data(ide_hwif_t
*);
99 * Do not even *think* about calling this!
101 void ide_init_port_data(ide_hwif_t
*hwif
, unsigned int index
)
103 /* bulk initialize hwif & drive info with zeros */
104 memset(hwif
, 0, sizeof(ide_hwif_t
));
106 /* fill in any non-zero initial values */
108 hwif
->major
= ide_hwif_to_major
[index
];
113 hwif
->name
[3] = '0' + index
;
115 hwif
->bus_state
= BUSSTATE_ON
;
117 init_completion(&hwif
->gendev_rel_comp
);
119 default_hwif_iops(hwif
);
120 default_hwif_transport(hwif
);
122 ide_port_init_devices_data(hwif
);
124 EXPORT_SYMBOL_GPL(ide_init_port_data
);
126 static void ide_port_init_devices_data(ide_hwif_t
*hwif
)
130 for (unit
= 0; unit
< MAX_DRIVES
; ++unit
) {
131 ide_drive_t
*drive
= &hwif
->drives
[unit
];
132 u8 j
= (hwif
->index
* MAX_DRIVES
) + unit
;
134 memset(drive
, 0, sizeof(*drive
));
136 drive
->media
= ide_disk
;
137 drive
->select
.all
= (unit
<<4)|0xa0;
139 drive
->ready_stat
= READY_STAT
;
140 drive
->bad_wstat
= BAD_W_STAT
;
141 drive
->special
.b
.recalibrate
= 1;
142 drive
->special
.b
.set_geometry
= 1;
143 drive
->name
[0] = 'h';
144 drive
->name
[1] = 'd';
145 drive
->name
[2] = 'a' + j
;
146 drive
->max_failures
= IDE_DEFAULT_MAX_FAILURES
;
148 INIT_LIST_HEAD(&drive
->list
);
149 init_completion(&drive
->gendev_rel_comp
);
153 static void __init
init_ide_data (void)
157 /* Initialise all interface structures */
158 for (index
= 0; index
< MAX_HWIFS
; ++index
) {
159 ide_hwif_t
*hwif
= &ide_hwifs
[index
];
161 ide_init_port_data(hwif
, index
);
165 void ide_remove_port_from_hwgroup(ide_hwif_t
*hwif
)
167 ide_hwgroup_t
*hwgroup
= hwif
->hwgroup
;
169 spin_lock_irq(&ide_lock
);
171 * Remove us from the hwgroup, and free
172 * the hwgroup if we were the only member
174 if (hwif
->next
== hwif
) {
175 BUG_ON(hwgroup
->hwif
!= hwif
);
178 /* There is another interface in hwgroup.
179 * Unlink us, and set hwgroup->drive and ->hwif to
182 ide_hwif_t
*g
= hwgroup
->hwif
;
184 while (g
->next
!= hwif
)
186 g
->next
= hwif
->next
;
187 if (hwgroup
->hwif
== hwif
) {
188 /* Chose a random hwif for hwgroup->hwif.
189 * It's guaranteed that there are no drives
190 * left in the hwgroup.
192 BUG_ON(hwgroup
->drive
!= NULL
);
195 BUG_ON(hwgroup
->hwif
== hwif
);
197 spin_unlock_irq(&ide_lock
);
200 /* Called with ide_lock held. */
201 static void __ide_port_unregister_devices(ide_hwif_t
*hwif
)
205 for (i
= 0; i
< MAX_DRIVES
; i
++) {
206 ide_drive_t
*drive
= &hwif
->drives
[i
];
208 if (drive
->present
) {
209 spin_unlock_irq(&ide_lock
);
210 device_unregister(&drive
->gendev
);
211 wait_for_completion(&drive
->gendev_rel_comp
);
212 spin_lock_irq(&ide_lock
);
217 void ide_port_unregister_devices(ide_hwif_t
*hwif
)
219 mutex_lock(&ide_cfg_mtx
);
220 spin_lock_irq(&ide_lock
);
221 __ide_port_unregister_devices(hwif
);
223 ide_port_init_devices_data(hwif
);
224 spin_unlock_irq(&ide_lock
);
225 mutex_unlock(&ide_cfg_mtx
);
227 EXPORT_SYMBOL_GPL(ide_port_unregister_devices
);
230 * ide_unregister - free an IDE interface
231 * @hwif: IDE interface
233 * Perform the final unregister of an IDE interface. At the moment
234 * we don't refcount interfaces so this will also get split up.
237 * The caller must not hold the IDE locks
238 * The drive present/vanishing is not yet properly locked
239 * Take care with the callbacks. These have been split to avoid
240 * deadlocking the IDE layer. The shutdown callback is called
241 * before we take the lock and free resources. It is up to the
242 * caller to be sure there is no pending I/O here, and that
243 * the interface will not be reopened (present/vanishing locking
244 * isn't yet done BTW). After we commit to the final kill we
245 * call the cleanup callback with the ide locks held.
247 * Unregister restores the hwif structures to the default state.
248 * This is raving bonkers.
251 void ide_unregister(ide_hwif_t
*hwif
)
254 ide_hwgroup_t
*hwgroup
;
257 BUG_ON(in_interrupt());
258 BUG_ON(irqs_disabled());
260 mutex_lock(&ide_cfg_mtx
);
262 spin_lock_irq(&ide_lock
);
264 __ide_port_unregister_devices(hwif
);
267 spin_unlock_irq(&ide_lock
);
269 ide_proc_unregister_port(hwif
);
271 hwgroup
= hwif
->hwgroup
;
273 * free the irq if we were the only hwif using it
277 if (g
->irq
== hwif
->irq
)
280 } while (g
!= hwgroup
->hwif
);
282 free_irq(hwif
->irq
, hwgroup
);
284 ide_remove_port_from_hwgroup(hwif
);
286 device_unregister(hwif
->portdev
);
287 device_unregister(&hwif
->gendev
);
288 wait_for_completion(&hwif
->gendev_rel_comp
);
291 * Remove us from the kernel's knowledge
293 blk_unregister_region(MKDEV(hwif
->major
, 0), MAX_DRIVES
<<PARTN_BITS
);
294 kfree(hwif
->sg_table
);
295 unregister_blkdev(hwif
->major
, hwif
->name
);
298 ide_release_dma_engine(hwif
);
300 spin_lock_irq(&ide_lock
);
301 /* restore hwif data to pristine status */
302 ide_init_port_data(hwif
, hwif
->index
);
303 spin_unlock_irq(&ide_lock
);
305 mutex_unlock(&ide_cfg_mtx
);
308 EXPORT_SYMBOL(ide_unregister
);
310 void ide_init_port_hw(ide_hwif_t
*hwif
, hw_regs_t
*hw
)
312 memcpy(&hwif
->io_ports
, &hw
->io_ports
, sizeof(hwif
->io_ports
));
314 hwif
->chipset
= hw
->chipset
;
315 hwif
->gendev
.parent
= hw
->dev
;
316 hwif
->ack_intr
= hw
->ack_intr
;
318 EXPORT_SYMBOL_GPL(ide_init_port_hw
);
321 * Locks for IDE setting functionality
324 DEFINE_MUTEX(ide_setting_mtx
);
326 EXPORT_SYMBOL_GPL(ide_setting_mtx
);
329 * ide_spin_wait_hwgroup - wait for group
330 * @drive: drive in the group
332 * Wait for an IDE device group to go non busy and then return
333 * holding the ide_lock which guards the hwgroup->busy status
334 * and right to use it.
337 int ide_spin_wait_hwgroup (ide_drive_t
*drive
)
339 ide_hwgroup_t
*hwgroup
= HWGROUP(drive
);
340 unsigned long timeout
= jiffies
+ (3 * HZ
);
342 spin_lock_irq(&ide_lock
);
344 while (hwgroup
->busy
) {
345 unsigned long lflags
;
346 spin_unlock_irq(&ide_lock
);
347 local_irq_set(lflags
);
348 if (time_after(jiffies
, timeout
)) {
349 local_irq_restore(lflags
);
350 printk(KERN_ERR
"%s: channel busy\n", drive
->name
);
353 local_irq_restore(lflags
);
354 spin_lock_irq(&ide_lock
);
359 EXPORT_SYMBOL(ide_spin_wait_hwgroup
);
361 int set_io_32bit(ide_drive_t
*drive
, int arg
)
363 if (drive
->no_io_32bit
)
366 if (arg
< 0 || arg
> 1 + (SUPPORT_VLB_SYNC
<< 1))
369 if (ide_spin_wait_hwgroup(drive
))
372 drive
->io_32bit
= arg
;
374 spin_unlock_irq(&ide_lock
);
379 static int set_ksettings(ide_drive_t
*drive
, int arg
)
381 if (arg
< 0 || arg
> 1)
384 if (ide_spin_wait_hwgroup(drive
))
386 drive
->keep_settings
= arg
;
387 spin_unlock_irq(&ide_lock
);
392 int set_using_dma(ide_drive_t
*drive
, int arg
)
394 #ifdef CONFIG_BLK_DEV_IDEDMA
395 ide_hwif_t
*hwif
= drive
->hwif
;
398 if (arg
< 0 || arg
> 1)
401 if (!drive
->id
|| !(drive
->id
->capability
& 1))
404 if (hwif
->dma_ops
== NULL
)
408 if (ide_spin_wait_hwgroup(drive
))
411 * set ->busy flag, unlock and let it ride
413 hwif
->hwgroup
->busy
= 1;
414 spin_unlock_irq(&ide_lock
);
419 if (ide_set_dma(drive
))
425 * lock, clear ->busy flag and unlock before leaving
427 spin_lock_irq(&ide_lock
);
428 hwif
->hwgroup
->busy
= 0;
429 spin_unlock_irq(&ide_lock
);
433 if (arg
< 0 || arg
> 1)
440 int set_pio_mode(ide_drive_t
*drive
, int arg
)
443 ide_hwif_t
*hwif
= drive
->hwif
;
444 const struct ide_port_ops
*port_ops
= hwif
->port_ops
;
446 if (arg
< 0 || arg
> 255)
449 if (port_ops
== NULL
|| port_ops
->set_pio_mode
== NULL
||
450 (hwif
->host_flags
& IDE_HFLAG_NO_SET_MODE
))
453 if (drive
->special
.b
.set_tune
)
456 rq
= blk_get_request(drive
->queue
, READ
, __GFP_WAIT
);
457 rq
->cmd_type
= REQ_TYPE_ATA_TASKFILE
;
459 drive
->tune_req
= (u8
) arg
;
460 drive
->special
.b
.set_tune
= 1;
462 blk_execute_rq(drive
->queue
, NULL
, rq
, 0);
468 static int set_unmaskirq(ide_drive_t
*drive
, int arg
)
470 if (drive
->no_unmask
)
473 if (arg
< 0 || arg
> 1)
476 if (ide_spin_wait_hwgroup(drive
))
479 spin_unlock_irq(&ide_lock
);
484 static int generic_ide_suspend(struct device
*dev
, pm_message_t mesg
)
486 ide_drive_t
*drive
= dev
->driver_data
;
487 ide_hwif_t
*hwif
= HWIF(drive
);
489 struct request_pm_state rqpm
;
493 /* Call ACPI _GTM only once */
494 if (!(drive
->dn
% 2))
495 ide_acpi_get_timing(hwif
);
497 memset(&rqpm
, 0, sizeof(rqpm
));
498 memset(&args
, 0, sizeof(args
));
499 rq
= blk_get_request(drive
->queue
, READ
, __GFP_WAIT
);
500 rq
->cmd_type
= REQ_TYPE_PM_SUSPEND
;
503 rqpm
.pm_step
= ide_pm_state_start_suspend
;
504 if (mesg
.event
== PM_EVENT_PRETHAW
)
505 mesg
.event
= PM_EVENT_FREEZE
;
506 rqpm
.pm_state
= mesg
.event
;
508 ret
= blk_execute_rq(drive
->queue
, NULL
, rq
, 0);
510 /* only call ACPI _PS3 after both drivers are suspended */
511 if (!ret
&& (((drive
->dn
% 2) && hwif
->drives
[0].present
512 && hwif
->drives
[1].present
)
513 || !hwif
->drives
[0].present
514 || !hwif
->drives
[1].present
))
515 ide_acpi_set_state(hwif
, 0);
519 static int generic_ide_resume(struct device
*dev
)
521 ide_drive_t
*drive
= dev
->driver_data
;
522 ide_hwif_t
*hwif
= HWIF(drive
);
524 struct request_pm_state rqpm
;
528 /* Call ACPI _STM only once */
529 if (!(drive
->dn
% 2)) {
530 ide_acpi_set_state(hwif
, 1);
531 ide_acpi_push_timing(hwif
);
534 ide_acpi_exec_tfs(drive
);
536 memset(&rqpm
, 0, sizeof(rqpm
));
537 memset(&args
, 0, sizeof(args
));
538 rq
= blk_get_request(drive
->queue
, READ
, __GFP_WAIT
);
539 rq
->cmd_type
= REQ_TYPE_PM_RESUME
;
540 rq
->cmd_flags
|= REQ_PREEMPT
;
543 rqpm
.pm_step
= ide_pm_state_start_resume
;
544 rqpm
.pm_state
= PM_EVENT_ON
;
546 err
= blk_execute_rq(drive
->queue
, NULL
, rq
, 1);
549 if (err
== 0 && dev
->driver
) {
550 ide_driver_t
*drv
= to_ide_driver(dev
->driver
);
559 int generic_ide_ioctl(ide_drive_t
*drive
, struct file
*file
, struct block_device
*bdev
,
560 unsigned int cmd
, unsigned long arg
)
564 void __user
*p
= (void __user
*)arg
;
565 int err
= 0, (*setfunc
)(ide_drive_t
*, int);
569 case HDIO_GET_32BIT
: val
= &drive
->io_32bit
; goto read_val
;
570 case HDIO_GET_KEEPSETTINGS
: val
= &drive
->keep_settings
; goto read_val
;
571 case HDIO_GET_UNMASKINTR
: val
= &drive
->unmask
; goto read_val
;
572 case HDIO_GET_DMA
: val
= &drive
->using_dma
; goto read_val
;
573 case HDIO_SET_32BIT
: setfunc
= set_io_32bit
; goto set_val
;
574 case HDIO_SET_KEEPSETTINGS
: setfunc
= set_ksettings
; goto set_val
;
575 case HDIO_SET_PIO_MODE
: setfunc
= set_pio_mode
; goto set_val
;
576 case HDIO_SET_UNMASKINTR
: setfunc
= set_unmaskirq
; goto set_val
;
577 case HDIO_SET_DMA
: setfunc
= set_using_dma
; goto set_val
;
581 case HDIO_OBSOLETE_IDENTITY
:
582 case HDIO_GET_IDENTITY
:
583 if (bdev
!= bdev
->bd_contains
)
585 if (drive
->id_read
== 0)
587 if (copy_to_user(p
, drive
->id
, (cmd
== HDIO_GET_IDENTITY
) ? sizeof(*drive
->id
) : 142))
592 return put_user(drive
->dsc_overlap
<< IDE_NICE_DSC_OVERLAP
|
593 drive
->atapi_overlap
<< IDE_NICE_ATAPI_OVERLAP
|
594 drive
->nice1
<< IDE_NICE_1
,
595 (long __user
*) arg
);
596 #ifdef CONFIG_IDE_TASK_IOCTL
597 case HDIO_DRIVE_TASKFILE
:
598 if (!capable(CAP_SYS_ADMIN
) || !capable(CAP_SYS_RAWIO
))
600 switch(drive
->media
) {
602 return ide_taskfile_ioctl(drive
, cmd
, arg
);
606 #endif /* CONFIG_IDE_TASK_IOCTL */
609 if (!capable(CAP_SYS_RAWIO
))
611 return ide_cmd_ioctl(drive
, cmd
, arg
);
613 case HDIO_DRIVE_TASK
:
614 if (!capable(CAP_SYS_RAWIO
))
616 return ide_task_ioctl(drive
, cmd
, arg
);
618 if (!capable(CAP_SYS_ADMIN
)) return -EACCES
;
619 if (arg
!= (arg
& ((1 << IDE_NICE_DSC_OVERLAP
) | (1 << IDE_NICE_1
))))
621 drive
->dsc_overlap
= (arg
>> IDE_NICE_DSC_OVERLAP
) & 1;
622 drv
= *(ide_driver_t
**)bdev
->bd_disk
->private_data
;
623 if (drive
->dsc_overlap
&& !drv
->supports_dsc_overlap
) {
624 drive
->dsc_overlap
= 0;
627 drive
->nice1
= (arg
>> IDE_NICE_1
) & 1;
629 case HDIO_DRIVE_RESET
:
630 if (!capable(CAP_SYS_ADMIN
))
634 * Abort the current command on the
635 * group if there is one, taking
636 * care not to allow anything else
637 * to be queued and to die on the
638 * spot if we miss one somehow
641 spin_lock_irqsave(&ide_lock
, flags
);
643 if (HWGROUP(drive
)->resetting
) {
644 spin_unlock_irqrestore(&ide_lock
, flags
);
648 ide_abort(drive
, "drive reset");
650 BUG_ON(HWGROUP(drive
)->handler
);
652 /* Ensure nothing gets queued after we
653 drop the lock. Reset will clear the busy */
655 HWGROUP(drive
)->busy
= 1;
656 spin_unlock_irqrestore(&ide_lock
, flags
);
657 (void) ide_do_reset(drive
);
660 case HDIO_GET_BUSSTATE
:
661 if (!capable(CAP_SYS_ADMIN
))
663 if (put_user(HWIF(drive
)->bus_state
, (long __user
*)arg
))
667 case HDIO_SET_BUSSTATE
:
668 if (!capable(CAP_SYS_ADMIN
))
676 mutex_lock(&ide_setting_mtx
);
677 spin_lock_irqsave(&ide_lock
, flags
);
679 spin_unlock_irqrestore(&ide_lock
, flags
);
680 mutex_unlock(&ide_setting_mtx
);
681 return err
>= 0 ? put_user(err
, (long __user
*)arg
) : err
;
684 if (bdev
!= bdev
->bd_contains
)
687 if (!capable(CAP_SYS_ADMIN
))
690 mutex_lock(&ide_setting_mtx
);
691 err
= setfunc(drive
, arg
);
692 mutex_unlock(&ide_setting_mtx
);
698 EXPORT_SYMBOL(generic_ide_ioctl
);
700 static int ide_bus_match(struct device
*dev
, struct device_driver
*drv
)
705 static char *media_string(ide_drive_t
*drive
)
707 switch (drive
->media
) {
723 static ssize_t
media_show(struct device
*dev
, struct device_attribute
*attr
, char *buf
)
725 ide_drive_t
*drive
= to_ide_device(dev
);
726 return sprintf(buf
, "%s\n", media_string(drive
));
729 static ssize_t
drivename_show(struct device
*dev
, struct device_attribute
*attr
, char *buf
)
731 ide_drive_t
*drive
= to_ide_device(dev
);
732 return sprintf(buf
, "%s\n", drive
->name
);
735 static ssize_t
modalias_show(struct device
*dev
, struct device_attribute
*attr
, char *buf
)
737 ide_drive_t
*drive
= to_ide_device(dev
);
738 return sprintf(buf
, "ide:m-%s\n", media_string(drive
));
741 static ssize_t
model_show(struct device
*dev
, struct device_attribute
*attr
,
744 ide_drive_t
*drive
= to_ide_device(dev
);
745 return sprintf(buf
, "%s\n", drive
->id
->model
);
748 static ssize_t
firmware_show(struct device
*dev
, struct device_attribute
*attr
,
751 ide_drive_t
*drive
= to_ide_device(dev
);
752 return sprintf(buf
, "%s\n", drive
->id
->fw_rev
);
755 static ssize_t
serial_show(struct device
*dev
, struct device_attribute
*attr
,
758 ide_drive_t
*drive
= to_ide_device(dev
);
759 return sprintf(buf
, "%s\n", drive
->id
->serial_no
);
762 static struct device_attribute ide_dev_attrs
[] = {
764 __ATTR_RO(drivename
),
768 __ATTR(serial
, 0400, serial_show
, NULL
),
772 static int ide_uevent(struct device
*dev
, struct kobj_uevent_env
*env
)
774 ide_drive_t
*drive
= to_ide_device(dev
);
776 add_uevent_var(env
, "MEDIA=%s", media_string(drive
));
777 add_uevent_var(env
, "DRIVENAME=%s", drive
->name
);
778 add_uevent_var(env
, "MODALIAS=ide:m-%s", media_string(drive
));
782 static int generic_ide_probe(struct device
*dev
)
784 ide_drive_t
*drive
= to_ide_device(dev
);
785 ide_driver_t
*drv
= to_ide_driver(dev
->driver
);
787 return drv
->probe
? drv
->probe(drive
) : -ENODEV
;
790 static int generic_ide_remove(struct device
*dev
)
792 ide_drive_t
*drive
= to_ide_device(dev
);
793 ide_driver_t
*drv
= to_ide_driver(dev
->driver
);
801 static void generic_ide_shutdown(struct device
*dev
)
803 ide_drive_t
*drive
= to_ide_device(dev
);
804 ide_driver_t
*drv
= to_ide_driver(dev
->driver
);
806 if (dev
->driver
&& drv
->shutdown
)
807 drv
->shutdown(drive
);
810 struct bus_type ide_bus_type
= {
812 .match
= ide_bus_match
,
813 .uevent
= ide_uevent
,
814 .probe
= generic_ide_probe
,
815 .remove
= generic_ide_remove
,
816 .shutdown
= generic_ide_shutdown
,
817 .dev_attrs
= ide_dev_attrs
,
818 .suspend
= generic_ide_suspend
,
819 .resume
= generic_ide_resume
,
822 EXPORT_SYMBOL_GPL(ide_bus_type
);
825 EXPORT_SYMBOL_GPL(ide_vlb_clk
);
827 module_param_named(vlb_clock
, ide_vlb_clk
, int, 0);
828 MODULE_PARM_DESC(vlb_clock
, "VLB clock frequency (in MHz)");
831 EXPORT_SYMBOL_GPL(ide_pci_clk
);
833 module_param_named(pci_clock
, ide_pci_clk
, int, 0);
834 MODULE_PARM_DESC(pci_clock
, "PCI bus clock frequency (in MHz)");
836 static int ide_set_dev_param_mask(const char *s
, struct kernel_param
*kp
)
839 unsigned int *dev_param_mask
= (unsigned int *)kp
->arg
;
841 if (sscanf(s
, "%d.%d:%d", &a
, &b
, &j
) != 3 &&
842 sscanf(s
, "%d.%d", &a
, &b
) != 2)
845 i
= a
* MAX_DRIVES
+ b
;
847 if (i
>= MAX_HWIFS
* MAX_DRIVES
|| j
< 0 || j
> 1)
851 *dev_param_mask
|= (1 << i
);
853 *dev_param_mask
&= (1 << i
);
858 static unsigned int ide_nodma
;
860 module_param_call(nodma
, ide_set_dev_param_mask
, NULL
, &ide_nodma
, 0);
861 MODULE_PARM_DESC(nodma
, "disallow DMA for a device");
863 static unsigned int ide_noflush
;
865 module_param_call(noflush
, ide_set_dev_param_mask
, NULL
, &ide_noflush
, 0);
866 MODULE_PARM_DESC(noflush
, "disable flush requests for a device");
868 static unsigned int ide_noprobe
;
870 module_param_call(noprobe
, ide_set_dev_param_mask
, NULL
, &ide_noprobe
, 0);
871 MODULE_PARM_DESC(noprobe
, "skip probing for a device");
873 static unsigned int ide_nowerr
;
875 module_param_call(nowerr
, ide_set_dev_param_mask
, NULL
, &ide_nowerr
, 0);
876 MODULE_PARM_DESC(nowerr
, "ignore the WRERR_STAT bit for a device");
878 static unsigned int ide_cdroms
;
880 module_param_call(cdrom
, ide_set_dev_param_mask
, NULL
, &ide_cdroms
, 0);
881 MODULE_PARM_DESC(cdrom
, "force device as a CD-ROM");
889 static unsigned int ide_disks
;
890 static struct chs_geom ide_disks_chs
[MAX_HWIFS
* MAX_DRIVES
];
892 static int ide_set_disk_chs(const char *str
, struct kernel_param
*kp
)
894 int a
, b
, c
= 0, h
= 0, s
= 0, i
, j
= 1;
896 if (sscanf(str
, "%d.%d:%d,%d,%d", &a
, &b
, &c
, &h
, &s
) != 5 &&
897 sscanf(str
, "%d.%d:%d", &a
, &b
, &j
) != 3)
900 i
= a
* MAX_DRIVES
+ b
;
902 if (i
>= MAX_HWIFS
* MAX_DRIVES
|| j
< 0 || j
> 1)
905 if (c
> INT_MAX
|| h
> 255 || s
> 255)
909 ide_disks
|= (1 << i
);
911 ide_disks
&= (1 << i
);
913 ide_disks_chs
[i
].cyl
= c
;
914 ide_disks_chs
[i
].head
= h
;
915 ide_disks_chs
[i
].sect
= s
;
920 module_param_call(chs
, ide_set_disk_chs
, NULL
, NULL
, 0);
921 MODULE_PARM_DESC(chs
, "force device as a disk (using CHS)");
923 static void ide_dev_apply_params(ide_drive_t
*drive
)
925 int i
= drive
->hwif
->index
* MAX_DRIVES
+ drive
->select
.b
.unit
;
927 if (ide_nodma
& (1 << i
)) {
928 printk(KERN_INFO
"ide: disallowing DMA for %s\n", drive
->name
);
931 if (ide_noflush
& (1 << i
)) {
932 printk(KERN_INFO
"ide: disabling flush requests for %s\n",
936 if (ide_noprobe
& (1 << i
)) {
937 printk(KERN_INFO
"ide: skipping probe for %s\n", drive
->name
);
940 if (ide_nowerr
& (1 << i
)) {
941 printk(KERN_INFO
"ide: ignoring the WRERR_STAT bit for %s\n",
943 drive
->bad_wstat
= BAD_R_STAT
;
945 if (ide_cdroms
& (1 << i
)) {
946 printk(KERN_INFO
"ide: forcing %s as a CD-ROM\n", drive
->name
);
948 drive
->media
= ide_cdrom
;
949 /* an ATAPI device ignores DRDY */
950 drive
->ready_stat
= 0;
952 if (ide_disks
& (1 << i
)) {
953 drive
->cyl
= drive
->bios_cyl
= ide_disks_chs
[i
].cyl
;
954 drive
->head
= drive
->bios_head
= ide_disks_chs
[i
].head
;
955 drive
->sect
= drive
->bios_sect
= ide_disks_chs
[i
].sect
;
956 drive
->forced_geom
= 1;
957 printk(KERN_INFO
"ide: forcing %s as a disk (%d/%d/%d)\n",
959 drive
->cyl
, drive
->head
, drive
->sect
);
961 drive
->media
= ide_disk
;
962 drive
->ready_stat
= READY_STAT
;
966 static unsigned int ide_ignore_cable
;
968 static int ide_set_ignore_cable(const char *s
, struct kernel_param
*kp
)
972 if (sscanf(s
, "%d:%d", &i
, &j
) != 2 && sscanf(s
, "%d", &i
) != 1)
975 if (i
>= MAX_HWIFS
|| j
< 0 || j
> 1)
979 ide_ignore_cable
|= (1 << i
);
981 ide_ignore_cable
&= (1 << i
);
986 module_param_call(ignore_cable
, ide_set_ignore_cable
, NULL
, NULL
, 0);
987 MODULE_PARM_DESC(ignore_cable
, "ignore cable detection");
989 void ide_port_apply_params(ide_hwif_t
*hwif
)
993 if (ide_ignore_cable
& (1 << hwif
->index
)) {
994 printk(KERN_INFO
"ide: ignoring cable detection for %s\n",
996 hwif
->cbl
= ATA_CBL_PATA40_SHORT
;
999 for (i
= 0; i
< MAX_DRIVES
; i
++)
1000 ide_dev_apply_params(&hwif
->drives
[i
]);
1004 * This is gets invoked once during initialization, to set *everything* up
1006 static int __init
ide_init(void)
1010 printk(KERN_INFO
"Uniform Multi-Platform E-IDE driver\n");
1012 ret
= bus_register(&ide_bus_type
);
1014 printk(KERN_WARNING
"IDE: bus_register error: %d\n", ret
);
1018 ide_port_class
= class_create(THIS_MODULE
, "ide_port");
1019 if (IS_ERR(ide_port_class
)) {
1020 ret
= PTR_ERR(ide_port_class
);
1021 goto out_port_class
;
1031 bus_unregister(&ide_bus_type
);
1036 static void __exit
ide_exit(void)
1040 class_destroy(ide_port_class
);
1042 bus_unregister(&ide_bus_type
);
1045 module_init(ide_init
);
1046 module_exit(ide_exit
);
1048 MODULE_LICENSE("GPL");