2 * Copyright (C) 1994-1998 Linus Torvalds & authors (see below)
3 * Copyright (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 #include <linux/module.h>
48 #include <linux/types.h>
49 #include <linux/string.h>
50 #include <linux/kernel.h>
51 #include <linux/interrupt.h>
52 #include <linux/major.h>
53 #include <linux/errno.h>
54 #include <linux/genhd.h>
55 #include <linux/slab.h>
56 #include <linux/init.h>
57 #include <linux/pci.h>
58 #include <linux/ide.h>
59 #include <linux/hdreg.h>
60 #include <linux/completion.h>
61 #include <linux/device.h>
64 /* default maximum number of failures */
65 #define IDE_DEFAULT_MAX_FAILURES 1
67 struct class *ide_port_class
;
69 static const u8 ide_hwif_to_major
[] = { IDE0_MAJOR
, IDE1_MAJOR
,
70 IDE2_MAJOR
, IDE3_MAJOR
,
71 IDE4_MAJOR
, IDE5_MAJOR
,
72 IDE6_MAJOR
, IDE7_MAJOR
,
73 IDE8_MAJOR
, IDE9_MAJOR
};
75 DEFINE_MUTEX(ide_cfg_mtx
);
77 __cacheline_aligned_in_smp
DEFINE_SPINLOCK(ide_lock
);
78 EXPORT_SYMBOL(ide_lock
);
80 static void ide_port_init_devices_data(ide_hwif_t
*);
83 * Do not even *think* about calling this!
85 void ide_init_port_data(ide_hwif_t
*hwif
, unsigned int index
)
87 /* bulk initialize hwif & drive info with zeros */
88 memset(hwif
, 0, sizeof(ide_hwif_t
));
90 /* fill in any non-zero initial values */
92 hwif
->major
= ide_hwif_to_major
[index
];
97 hwif
->name
[3] = '0' + index
;
99 init_completion(&hwif
->gendev_rel_comp
);
101 hwif
->tp_ops
= &default_tp_ops
;
103 ide_port_init_devices_data(hwif
);
106 static void ide_port_init_devices_data(ide_hwif_t
*hwif
)
110 for (unit
= 0; unit
< MAX_DRIVES
; ++unit
) {
111 ide_drive_t
*drive
= &hwif
->drives
[unit
];
112 u8 j
= (hwif
->index
* MAX_DRIVES
) + unit
;
114 memset(drive
, 0, sizeof(*drive
));
116 drive
->media
= ide_disk
;
117 drive
->select
.all
= (unit
<<4)|0xa0;
119 drive
->ready_stat
= ATA_DRDY
;
120 drive
->bad_wstat
= BAD_W_STAT
;
121 drive
->special
.b
.recalibrate
= 1;
122 drive
->special
.b
.set_geometry
= 1;
123 drive
->name
[0] = 'h';
124 drive
->name
[1] = 'd';
125 drive
->name
[2] = 'a' + j
;
126 drive
->max_failures
= IDE_DEFAULT_MAX_FAILURES
;
128 INIT_LIST_HEAD(&drive
->list
);
129 init_completion(&drive
->gendev_rel_comp
);
133 /* Called with ide_lock held. */
134 static void __ide_port_unregister_devices(ide_hwif_t
*hwif
)
138 for (i
= 0; i
< MAX_DRIVES
; i
++) {
139 ide_drive_t
*drive
= &hwif
->drives
[i
];
141 if (drive
->present
) {
142 spin_unlock_irq(&ide_lock
);
143 device_unregister(&drive
->gendev
);
144 wait_for_completion(&drive
->gendev_rel_comp
);
145 spin_lock_irq(&ide_lock
);
150 void ide_port_unregister_devices(ide_hwif_t
*hwif
)
152 mutex_lock(&ide_cfg_mtx
);
153 spin_lock_irq(&ide_lock
);
154 __ide_port_unregister_devices(hwif
);
156 ide_port_init_devices_data(hwif
);
157 spin_unlock_irq(&ide_lock
);
158 mutex_unlock(&ide_cfg_mtx
);
160 EXPORT_SYMBOL_GPL(ide_port_unregister_devices
);
163 * ide_unregister - free an IDE interface
164 * @hwif: IDE interface
166 * Perform the final unregister of an IDE interface. At the moment
167 * we don't refcount interfaces so this will also get split up.
170 * The caller must not hold the IDE locks
171 * The drive present/vanishing is not yet properly locked
172 * Take care with the callbacks. These have been split to avoid
173 * deadlocking the IDE layer. The shutdown callback is called
174 * before we take the lock and free resources. It is up to the
175 * caller to be sure there is no pending I/O here, and that
176 * the interface will not be reopened (present/vanishing locking
177 * isn't yet done BTW). After we commit to the final kill we
178 * call the cleanup callback with the ide locks held.
180 * Unregister restores the hwif structures to the default state.
181 * This is raving bonkers.
184 void ide_unregister(ide_hwif_t
*hwif
)
187 ide_hwgroup_t
*hwgroup
;
190 BUG_ON(in_interrupt());
191 BUG_ON(irqs_disabled());
193 mutex_lock(&ide_cfg_mtx
);
195 spin_lock_irq(&ide_lock
);
197 __ide_port_unregister_devices(hwif
);
200 spin_unlock_irq(&ide_lock
);
202 ide_proc_unregister_port(hwif
);
204 hwgroup
= hwif
->hwgroup
;
206 * free the irq if we were the only hwif using it
210 if (g
->irq
== hwif
->irq
)
213 } while (g
!= hwgroup
->hwif
);
215 free_irq(hwif
->irq
, hwgroup
);
217 ide_remove_port_from_hwgroup(hwif
);
219 device_unregister(hwif
->portdev
);
220 device_unregister(&hwif
->gendev
);
221 wait_for_completion(&hwif
->gendev_rel_comp
);
224 * Remove us from the kernel's knowledge
226 blk_unregister_region(MKDEV(hwif
->major
, 0), MAX_DRIVES
<<PARTN_BITS
);
227 kfree(hwif
->sg_table
);
228 unregister_blkdev(hwif
->major
, hwif
->name
);
231 ide_release_dma_engine(hwif
);
233 mutex_unlock(&ide_cfg_mtx
);
236 void ide_init_port_hw(ide_hwif_t
*hwif
, hw_regs_t
*hw
)
238 memcpy(&hwif
->io_ports
, &hw
->io_ports
, sizeof(hwif
->io_ports
));
240 hwif
->chipset
= hw
->chipset
;
242 hwif
->gendev
.parent
= hw
->parent
? hw
->parent
: hw
->dev
;
243 hwif
->ack_intr
= hw
->ack_intr
;
244 hwif
->config_data
= hw
->config
;
248 * Locks for IDE setting functionality
251 DEFINE_MUTEX(ide_setting_mtx
);
253 ide_devset_get(io_32bit
, io_32bit
);
255 static int set_io_32bit(ide_drive_t
*drive
, int arg
)
257 if (drive
->no_io_32bit
)
260 if (arg
< 0 || arg
> 1 + (SUPPORT_VLB_SYNC
<< 1))
263 drive
->io_32bit
= arg
;
268 ide_devset_get(ksettings
, keep_settings
);
270 static int set_ksettings(ide_drive_t
*drive
, int arg
)
272 if (arg
< 0 || arg
> 1)
275 drive
->keep_settings
= arg
;
280 ide_devset_get(using_dma
, using_dma
);
282 static int set_using_dma(ide_drive_t
*drive
, int arg
)
284 #ifdef CONFIG_BLK_DEV_IDEDMA
287 if (arg
< 0 || arg
> 1)
290 if (ata_id_has_dma(drive
->id
) == 0)
293 if (drive
->hwif
->dma_ops
== NULL
)
299 if (ide_set_dma(drive
))
307 if (arg
< 0 || arg
> 1)
314 static int set_pio_mode(ide_drive_t
*drive
, int arg
)
317 ide_hwif_t
*hwif
= drive
->hwif
;
318 const struct ide_port_ops
*port_ops
= hwif
->port_ops
;
320 if (arg
< 0 || arg
> 255)
323 if (port_ops
== NULL
|| port_ops
->set_pio_mode
== NULL
||
324 (hwif
->host_flags
& IDE_HFLAG_NO_SET_MODE
))
327 if (drive
->special
.b
.set_tune
)
330 rq
= blk_get_request(drive
->queue
, READ
, __GFP_WAIT
);
331 rq
->cmd_type
= REQ_TYPE_ATA_TASKFILE
;
333 drive
->tune_req
= (u8
) arg
;
334 drive
->special
.b
.set_tune
= 1;
336 blk_execute_rq(drive
->queue
, NULL
, rq
, 0);
342 ide_devset_get(unmaskirq
, unmask
);
344 static int set_unmaskirq(ide_drive_t
*drive
, int arg
)
346 if (drive
->no_unmask
)
349 if (arg
< 0 || arg
> 1)
357 #define ide_gen_devset_rw(_name, _func) \
358 __IDE_DEVSET(_name, DS_SYNC, get_##_func, set_##_func)
360 ide_gen_devset_rw(io_32bit
, io_32bit
);
361 ide_gen_devset_rw(keepsettings
, ksettings
);
362 ide_gen_devset_rw(unmaskirq
, unmaskirq
);
363 ide_gen_devset_rw(using_dma
, using_dma
);
364 __IDE_DEVSET(pio_mode
, 0, NULL
, set_pio_mode
);
366 static int generic_ide_suspend(struct device
*dev
, pm_message_t mesg
)
368 ide_drive_t
*drive
= dev
->driver_data
;
369 ide_hwif_t
*hwif
= HWIF(drive
);
371 struct request_pm_state rqpm
;
375 /* Call ACPI _GTM only once */
376 if (!(drive
->dn
% 2))
377 ide_acpi_get_timing(hwif
);
379 memset(&rqpm
, 0, sizeof(rqpm
));
380 memset(&args
, 0, sizeof(args
));
381 rq
= blk_get_request(drive
->queue
, READ
, __GFP_WAIT
);
382 rq
->cmd_type
= REQ_TYPE_PM_SUSPEND
;
385 rqpm
.pm_step
= ide_pm_state_start_suspend
;
386 if (mesg
.event
== PM_EVENT_PRETHAW
)
387 mesg
.event
= PM_EVENT_FREEZE
;
388 rqpm
.pm_state
= mesg
.event
;
390 ret
= blk_execute_rq(drive
->queue
, NULL
, rq
, 0);
392 /* only call ACPI _PS3 after both drivers are suspended */
393 if (!ret
&& (((drive
->dn
% 2) && hwif
->drives
[0].present
394 && hwif
->drives
[1].present
)
395 || !hwif
->drives
[0].present
396 || !hwif
->drives
[1].present
))
397 ide_acpi_set_state(hwif
, 0);
401 static int generic_ide_resume(struct device
*dev
)
403 ide_drive_t
*drive
= dev
->driver_data
;
404 ide_hwif_t
*hwif
= HWIF(drive
);
406 struct request_pm_state rqpm
;
410 /* Call ACPI _STM only once */
411 if (!(drive
->dn
% 2)) {
412 ide_acpi_set_state(hwif
, 1);
413 ide_acpi_push_timing(hwif
);
416 ide_acpi_exec_tfs(drive
);
418 memset(&rqpm
, 0, sizeof(rqpm
));
419 memset(&args
, 0, sizeof(args
));
420 rq
= blk_get_request(drive
->queue
, READ
, __GFP_WAIT
);
421 rq
->cmd_type
= REQ_TYPE_PM_RESUME
;
422 rq
->cmd_flags
|= REQ_PREEMPT
;
425 rqpm
.pm_step
= ide_pm_state_start_resume
;
426 rqpm
.pm_state
= PM_EVENT_ON
;
428 err
= blk_execute_rq(drive
->queue
, NULL
, rq
, 1);
431 if (err
== 0 && dev
->driver
) {
432 ide_driver_t
*drv
= to_ide_driver(dev
->driver
);
442 * ide_device_get - get an additional reference to a ide_drive_t
443 * @drive: device to get a reference to
445 * Gets a reference to the ide_drive_t and increments the use count of the
446 * underlying LLDD module.
448 int ide_device_get(ide_drive_t
*drive
)
450 struct device
*host_dev
;
451 struct module
*module
;
453 if (!get_device(&drive
->gendev
))
456 host_dev
= drive
->hwif
->host
->dev
[0];
457 module
= host_dev
? host_dev
->driver
->owner
: NULL
;
459 if (module
&& !try_module_get(module
)) {
460 put_device(&drive
->gendev
);
466 EXPORT_SYMBOL_GPL(ide_device_get
);
469 * ide_device_put - release a reference to a ide_drive_t
470 * @drive: device to release a reference on
472 * Release a reference to the ide_drive_t and decrements the use count of
473 * the underlying LLDD module.
475 void ide_device_put(ide_drive_t
*drive
)
477 #ifdef CONFIG_MODULE_UNLOAD
478 struct device
*host_dev
= drive
->hwif
->host
->dev
[0];
479 struct module
*module
= host_dev
? host_dev
->driver
->owner
: NULL
;
484 put_device(&drive
->gendev
);
486 EXPORT_SYMBOL_GPL(ide_device_put
);
488 static int ide_bus_match(struct device
*dev
, struct device_driver
*drv
)
493 static char *media_string(ide_drive_t
*drive
)
495 switch (drive
->media
) {
511 static ssize_t
media_show(struct device
*dev
, struct device_attribute
*attr
, char *buf
)
513 ide_drive_t
*drive
= to_ide_device(dev
);
514 return sprintf(buf
, "%s\n", media_string(drive
));
517 static ssize_t
drivename_show(struct device
*dev
, struct device_attribute
*attr
, char *buf
)
519 ide_drive_t
*drive
= to_ide_device(dev
);
520 return sprintf(buf
, "%s\n", drive
->name
);
523 static ssize_t
modalias_show(struct device
*dev
, struct device_attribute
*attr
, char *buf
)
525 ide_drive_t
*drive
= to_ide_device(dev
);
526 return sprintf(buf
, "ide:m-%s\n", media_string(drive
));
529 static ssize_t
model_show(struct device
*dev
, struct device_attribute
*attr
,
532 ide_drive_t
*drive
= to_ide_device(dev
);
533 return sprintf(buf
, "%s\n", (char *)&drive
->id
[ATA_ID_PROD
]);
536 static ssize_t
firmware_show(struct device
*dev
, struct device_attribute
*attr
,
539 ide_drive_t
*drive
= to_ide_device(dev
);
540 return sprintf(buf
, "%s\n", (char *)&drive
->id
[ATA_ID_FW_REV
]);
543 static ssize_t
serial_show(struct device
*dev
, struct device_attribute
*attr
,
546 ide_drive_t
*drive
= to_ide_device(dev
);
547 return sprintf(buf
, "%s\n", (char *)&drive
->id
[ATA_ID_SERNO
]);
550 static struct device_attribute ide_dev_attrs
[] = {
552 __ATTR_RO(drivename
),
556 __ATTR(serial
, 0400, serial_show
, NULL
),
560 static int ide_uevent(struct device
*dev
, struct kobj_uevent_env
*env
)
562 ide_drive_t
*drive
= to_ide_device(dev
);
564 add_uevent_var(env
, "MEDIA=%s", media_string(drive
));
565 add_uevent_var(env
, "DRIVENAME=%s", drive
->name
);
566 add_uevent_var(env
, "MODALIAS=ide:m-%s", media_string(drive
));
570 static int generic_ide_probe(struct device
*dev
)
572 ide_drive_t
*drive
= to_ide_device(dev
);
573 ide_driver_t
*drv
= to_ide_driver(dev
->driver
);
575 return drv
->probe
? drv
->probe(drive
) : -ENODEV
;
578 static int generic_ide_remove(struct device
*dev
)
580 ide_drive_t
*drive
= to_ide_device(dev
);
581 ide_driver_t
*drv
= to_ide_driver(dev
->driver
);
589 static void generic_ide_shutdown(struct device
*dev
)
591 ide_drive_t
*drive
= to_ide_device(dev
);
592 ide_driver_t
*drv
= to_ide_driver(dev
->driver
);
594 if (dev
->driver
&& drv
->shutdown
)
595 drv
->shutdown(drive
);
598 struct bus_type ide_bus_type
= {
600 .match
= ide_bus_match
,
601 .uevent
= ide_uevent
,
602 .probe
= generic_ide_probe
,
603 .remove
= generic_ide_remove
,
604 .shutdown
= generic_ide_shutdown
,
605 .dev_attrs
= ide_dev_attrs
,
606 .suspend
= generic_ide_suspend
,
607 .resume
= generic_ide_resume
,
610 EXPORT_SYMBOL_GPL(ide_bus_type
);
613 EXPORT_SYMBOL_GPL(ide_vlb_clk
);
615 module_param_named(vlb_clock
, ide_vlb_clk
, int, 0);
616 MODULE_PARM_DESC(vlb_clock
, "VLB clock frequency (in MHz)");
619 EXPORT_SYMBOL_GPL(ide_pci_clk
);
621 module_param_named(pci_clock
, ide_pci_clk
, int, 0);
622 MODULE_PARM_DESC(pci_clock
, "PCI bus clock frequency (in MHz)");
624 static int ide_set_dev_param_mask(const char *s
, struct kernel_param
*kp
)
627 unsigned int *dev_param_mask
= (unsigned int *)kp
->arg
;
629 if (sscanf(s
, "%d.%d:%d", &a
, &b
, &j
) != 3 &&
630 sscanf(s
, "%d.%d", &a
, &b
) != 2)
633 i
= a
* MAX_DRIVES
+ b
;
635 if (i
>= MAX_HWIFS
* MAX_DRIVES
|| j
< 0 || j
> 1)
639 *dev_param_mask
|= (1 << i
);
641 *dev_param_mask
&= (1 << i
);
646 static unsigned int ide_nodma
;
648 module_param_call(nodma
, ide_set_dev_param_mask
, NULL
, &ide_nodma
, 0);
649 MODULE_PARM_DESC(nodma
, "disallow DMA for a device");
651 static unsigned int ide_noflush
;
653 module_param_call(noflush
, ide_set_dev_param_mask
, NULL
, &ide_noflush
, 0);
654 MODULE_PARM_DESC(noflush
, "disable flush requests for a device");
656 static unsigned int ide_noprobe
;
658 module_param_call(noprobe
, ide_set_dev_param_mask
, NULL
, &ide_noprobe
, 0);
659 MODULE_PARM_DESC(noprobe
, "skip probing for a device");
661 static unsigned int ide_nowerr
;
663 module_param_call(nowerr
, ide_set_dev_param_mask
, NULL
, &ide_nowerr
, 0);
664 MODULE_PARM_DESC(nowerr
, "ignore the ATA_DF bit for a device");
666 static unsigned int ide_cdroms
;
668 module_param_call(cdrom
, ide_set_dev_param_mask
, NULL
, &ide_cdroms
, 0);
669 MODULE_PARM_DESC(cdrom
, "force device as a CD-ROM");
677 static unsigned int ide_disks
;
678 static struct chs_geom ide_disks_chs
[MAX_HWIFS
* MAX_DRIVES
];
680 static int ide_set_disk_chs(const char *str
, struct kernel_param
*kp
)
682 int a
, b
, c
= 0, h
= 0, s
= 0, i
, j
= 1;
684 if (sscanf(str
, "%d.%d:%d,%d,%d", &a
, &b
, &c
, &h
, &s
) != 5 &&
685 sscanf(str
, "%d.%d:%d", &a
, &b
, &j
) != 3)
688 i
= a
* MAX_DRIVES
+ b
;
690 if (i
>= MAX_HWIFS
* MAX_DRIVES
|| j
< 0 || j
> 1)
693 if (c
> INT_MAX
|| h
> 255 || s
> 255)
697 ide_disks
|= (1 << i
);
699 ide_disks
&= (1 << i
);
701 ide_disks_chs
[i
].cyl
= c
;
702 ide_disks_chs
[i
].head
= h
;
703 ide_disks_chs
[i
].sect
= s
;
708 module_param_call(chs
, ide_set_disk_chs
, NULL
, NULL
, 0);
709 MODULE_PARM_DESC(chs
, "force device as a disk (using CHS)");
711 static void ide_dev_apply_params(ide_drive_t
*drive
)
713 int i
= drive
->hwif
->index
* MAX_DRIVES
+ drive
->select
.b
.unit
;
715 if (ide_nodma
& (1 << i
)) {
716 printk(KERN_INFO
"ide: disallowing DMA for %s\n", drive
->name
);
719 if (ide_noflush
& (1 << i
)) {
720 printk(KERN_INFO
"ide: disabling flush requests for %s\n",
724 if (ide_noprobe
& (1 << i
)) {
725 printk(KERN_INFO
"ide: skipping probe for %s\n", drive
->name
);
728 if (ide_nowerr
& (1 << i
)) {
729 printk(KERN_INFO
"ide: ignoring the ATA_DF bit for %s\n",
731 drive
->bad_wstat
= BAD_R_STAT
;
733 if (ide_cdroms
& (1 << i
)) {
734 printk(KERN_INFO
"ide: forcing %s as a CD-ROM\n", drive
->name
);
736 drive
->media
= ide_cdrom
;
737 /* an ATAPI device ignores DRDY */
738 drive
->ready_stat
= 0;
740 if (ide_disks
& (1 << i
)) {
741 drive
->cyl
= drive
->bios_cyl
= ide_disks_chs
[i
].cyl
;
742 drive
->head
= drive
->bios_head
= ide_disks_chs
[i
].head
;
743 drive
->sect
= drive
->bios_sect
= ide_disks_chs
[i
].sect
;
744 drive
->forced_geom
= 1;
745 printk(KERN_INFO
"ide: forcing %s as a disk (%d/%d/%d)\n",
747 drive
->cyl
, drive
->head
, drive
->sect
);
749 drive
->media
= ide_disk
;
750 drive
->ready_stat
= ATA_DRDY
;
754 static unsigned int ide_ignore_cable
;
756 static int ide_set_ignore_cable(const char *s
, struct kernel_param
*kp
)
760 if (sscanf(s
, "%d:%d", &i
, &j
) != 2 && sscanf(s
, "%d", &i
) != 1)
763 if (i
>= MAX_HWIFS
|| j
< 0 || j
> 1)
767 ide_ignore_cable
|= (1 << i
);
769 ide_ignore_cable
&= (1 << i
);
774 module_param_call(ignore_cable
, ide_set_ignore_cable
, NULL
, NULL
, 0);
775 MODULE_PARM_DESC(ignore_cable
, "ignore cable detection");
777 void ide_port_apply_params(ide_hwif_t
*hwif
)
781 if (ide_ignore_cable
& (1 << hwif
->index
)) {
782 printk(KERN_INFO
"ide: ignoring cable detection for %s\n",
784 hwif
->cbl
= ATA_CBL_PATA40_SHORT
;
787 for (i
= 0; i
< MAX_DRIVES
; i
++)
788 ide_dev_apply_params(&hwif
->drives
[i
]);
792 * This is gets invoked once during initialization, to set *everything* up
794 static int __init
ide_init(void)
798 printk(KERN_INFO
"Uniform Multi-Platform E-IDE driver\n");
800 ret
= bus_register(&ide_bus_type
);
802 printk(KERN_WARNING
"IDE: bus_register error: %d\n", ret
);
806 ide_port_class
= class_create(THIS_MODULE
, "ide_port");
807 if (IS_ERR(ide_port_class
)) {
808 ret
= PTR_ERR(ide_port_class
);
817 bus_unregister(&ide_bus_type
);
822 static void __exit
ide_exit(void)
826 class_destroy(ide_port_class
);
828 bus_unregister(&ide_bus_type
);
831 module_init(ide_init
);
832 module_exit(ide_exit
);
834 MODULE_LICENSE("GPL");