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
);
254 * ide_spin_wait_hwgroup - wait for group
255 * @drive: drive in the group
257 * Wait for an IDE device group to go non busy and then return
258 * holding the ide_lock which guards the hwgroup->busy status
259 * and right to use it.
262 int ide_spin_wait_hwgroup (ide_drive_t
*drive
)
264 ide_hwgroup_t
*hwgroup
= HWGROUP(drive
);
265 unsigned long timeout
= jiffies
+ (3 * HZ
);
267 spin_lock_irq(&ide_lock
);
269 while (hwgroup
->busy
) {
270 unsigned long lflags
;
271 spin_unlock_irq(&ide_lock
);
272 local_irq_set(lflags
);
273 if (time_after(jiffies
, timeout
)) {
274 local_irq_restore(lflags
);
275 printk(KERN_ERR
"%s: channel busy\n", drive
->name
);
278 local_irq_restore(lflags
);
279 spin_lock_irq(&ide_lock
);
284 EXPORT_SYMBOL(ide_spin_wait_hwgroup
);
286 ide_devset_get(io_32bit
, io_32bit
);
288 int set_io_32bit(ide_drive_t
*drive
, int arg
)
290 if (drive
->no_io_32bit
)
293 if (arg
< 0 || arg
> 1 + (SUPPORT_VLB_SYNC
<< 1))
296 if (ide_spin_wait_hwgroup(drive
))
299 drive
->io_32bit
= arg
;
301 spin_unlock_irq(&ide_lock
);
306 ide_devset_get(ksettings
, keep_settings
);
308 int set_ksettings(ide_drive_t
*drive
, int arg
)
310 if (arg
< 0 || arg
> 1)
313 if (ide_spin_wait_hwgroup(drive
))
315 drive
->keep_settings
= arg
;
316 spin_unlock_irq(&ide_lock
);
321 ide_devset_get(using_dma
, using_dma
);
323 int set_using_dma(ide_drive_t
*drive
, int arg
)
325 #ifdef CONFIG_BLK_DEV_IDEDMA
326 ide_hwif_t
*hwif
= drive
->hwif
;
329 if (arg
< 0 || arg
> 1)
332 if (ata_id_has_dma(drive
->id
) == 0)
335 if (hwif
->dma_ops
== NULL
)
339 if (ide_spin_wait_hwgroup(drive
))
342 * set ->busy flag, unlock and let it ride
344 hwif
->hwgroup
->busy
= 1;
345 spin_unlock_irq(&ide_lock
);
350 if (ide_set_dma(drive
))
356 * lock, clear ->busy flag and unlock before leaving
358 spin_lock_irq(&ide_lock
);
359 hwif
->hwgroup
->busy
= 0;
360 spin_unlock_irq(&ide_lock
);
364 if (arg
< 0 || arg
> 1)
371 int set_pio_mode(ide_drive_t
*drive
, int arg
)
374 ide_hwif_t
*hwif
= drive
->hwif
;
375 const struct ide_port_ops
*port_ops
= hwif
->port_ops
;
377 if (arg
< 0 || arg
> 255)
380 if (port_ops
== NULL
|| port_ops
->set_pio_mode
== NULL
||
381 (hwif
->host_flags
& IDE_HFLAG_NO_SET_MODE
))
384 if (drive
->special
.b
.set_tune
)
387 rq
= blk_get_request(drive
->queue
, READ
, __GFP_WAIT
);
388 rq
->cmd_type
= REQ_TYPE_ATA_TASKFILE
;
390 drive
->tune_req
= (u8
) arg
;
391 drive
->special
.b
.set_tune
= 1;
393 blk_execute_rq(drive
->queue
, NULL
, rq
, 0);
399 ide_devset_get(unmaskirq
, unmask
);
401 int set_unmaskirq(ide_drive_t
*drive
, int arg
)
403 if (drive
->no_unmask
)
406 if (arg
< 0 || arg
> 1)
409 if (ide_spin_wait_hwgroup(drive
))
412 spin_unlock_irq(&ide_lock
);
417 static int generic_ide_suspend(struct device
*dev
, pm_message_t mesg
)
419 ide_drive_t
*drive
= dev
->driver_data
;
420 ide_hwif_t
*hwif
= HWIF(drive
);
422 struct request_pm_state rqpm
;
426 /* Call ACPI _GTM only once */
427 if (!(drive
->dn
% 2))
428 ide_acpi_get_timing(hwif
);
430 memset(&rqpm
, 0, sizeof(rqpm
));
431 memset(&args
, 0, sizeof(args
));
432 rq
= blk_get_request(drive
->queue
, READ
, __GFP_WAIT
);
433 rq
->cmd_type
= REQ_TYPE_PM_SUSPEND
;
436 rqpm
.pm_step
= ide_pm_state_start_suspend
;
437 if (mesg
.event
== PM_EVENT_PRETHAW
)
438 mesg
.event
= PM_EVENT_FREEZE
;
439 rqpm
.pm_state
= mesg
.event
;
441 ret
= blk_execute_rq(drive
->queue
, NULL
, rq
, 0);
443 /* only call ACPI _PS3 after both drivers are suspended */
444 if (!ret
&& (((drive
->dn
% 2) && hwif
->drives
[0].present
445 && hwif
->drives
[1].present
)
446 || !hwif
->drives
[0].present
447 || !hwif
->drives
[1].present
))
448 ide_acpi_set_state(hwif
, 0);
452 static int generic_ide_resume(struct device
*dev
)
454 ide_drive_t
*drive
= dev
->driver_data
;
455 ide_hwif_t
*hwif
= HWIF(drive
);
457 struct request_pm_state rqpm
;
461 /* Call ACPI _STM only once */
462 if (!(drive
->dn
% 2)) {
463 ide_acpi_set_state(hwif
, 1);
464 ide_acpi_push_timing(hwif
);
467 ide_acpi_exec_tfs(drive
);
469 memset(&rqpm
, 0, sizeof(rqpm
));
470 memset(&args
, 0, sizeof(args
));
471 rq
= blk_get_request(drive
->queue
, READ
, __GFP_WAIT
);
472 rq
->cmd_type
= REQ_TYPE_PM_RESUME
;
473 rq
->cmd_flags
|= REQ_PREEMPT
;
476 rqpm
.pm_step
= ide_pm_state_start_resume
;
477 rqpm
.pm_state
= PM_EVENT_ON
;
479 err
= blk_execute_rq(drive
->queue
, NULL
, rq
, 1);
482 if (err
== 0 && dev
->driver
) {
483 ide_driver_t
*drv
= to_ide_driver(dev
->driver
);
492 static int generic_drive_reset(ide_drive_t
*drive
)
497 rq
= blk_get_request(drive
->queue
, READ
, __GFP_WAIT
);
498 rq
->cmd_type
= REQ_TYPE_SPECIAL
;
500 rq
->cmd
[0] = REQ_DRIVE_RESET
;
501 rq
->cmd_flags
|= REQ_SOFTBARRIER
;
502 if (blk_execute_rq(drive
->queue
, NULL
, rq
, 1))
508 static int ide_get_identity_ioctl(ide_drive_t
*drive
, unsigned int cmd
,
512 int size
= (cmd
== HDIO_GET_IDENTITY
) ? (ATA_ID_WORDS
* 2) : 142;
515 if (drive
->id_read
== 0) {
520 id
= kmalloc(size
, GFP_KERNEL
);
526 memcpy(id
, drive
->id
, size
);
527 ata_id_to_hd_driveid(id
);
529 if (copy_to_user((void __user
*)arg
, id
, size
))
537 static int ide_get_nice_ioctl(ide_drive_t
*drive
, unsigned long arg
)
539 return put_user((drive
->dsc_overlap
<< IDE_NICE_DSC_OVERLAP
) |
540 (drive
->nice1
<< IDE_NICE_1
), (long __user
*)arg
);
543 static int ide_set_nice_ioctl(ide_drive_t
*drive
, unsigned long arg
)
545 if (arg
!= (arg
& ((1 << IDE_NICE_DSC_OVERLAP
) | (1 << IDE_NICE_1
))))
548 if (((arg
>> IDE_NICE_DSC_OVERLAP
) & 1) &&
549 (drive
->media
== ide_disk
|| drive
->media
== ide_floppy
||
553 drive
->dsc_overlap
= (arg
>> IDE_NICE_DSC_OVERLAP
) & 1;
554 drive
->nice1
= (arg
>> IDE_NICE_1
) & 1;
559 static const struct ide_ioctl_devset ide_ioctl_settings
[] = {
560 { HDIO_GET_32BIT
, HDIO_SET_32BIT
, get_io_32bit
, set_io_32bit
},
561 { HDIO_GET_KEEPSETTINGS
, HDIO_SET_KEEPSETTINGS
, get_ksettings
, set_ksettings
},
562 { HDIO_GET_UNMASKINTR
, HDIO_SET_UNMASKINTR
, get_unmaskirq
, set_unmaskirq
},
563 { HDIO_GET_DMA
, HDIO_SET_DMA
, get_using_dma
, set_using_dma
},
564 { -1, HDIO_SET_PIO_MODE
, NULL
, set_pio_mode
},
568 int generic_ide_ioctl(ide_drive_t
*drive
, struct file
*file
, struct block_device
*bdev
,
569 unsigned int cmd
, unsigned long arg
)
573 err
= ide_setting_ioctl(drive
, bdev
, cmd
, arg
, ide_ioctl_settings
);
574 if (err
!= -EOPNOTSUPP
)
578 case HDIO_OBSOLETE_IDENTITY
:
579 case HDIO_GET_IDENTITY
:
580 if (bdev
!= bdev
->bd_contains
)
582 return ide_get_identity_ioctl(drive
, cmd
, arg
);
584 return ide_get_nice_ioctl(drive
, arg
);
585 #ifdef CONFIG_IDE_TASK_IOCTL
586 case HDIO_DRIVE_TASKFILE
:
587 if (!capable(CAP_SYS_ADMIN
) || !capable(CAP_SYS_RAWIO
))
589 switch(drive
->media
) {
591 return ide_taskfile_ioctl(drive
, cmd
, arg
);
595 #endif /* CONFIG_IDE_TASK_IOCTL */
598 if (!capable(CAP_SYS_RAWIO
))
600 return ide_cmd_ioctl(drive
, cmd
, arg
);
602 case HDIO_DRIVE_TASK
:
603 if (!capable(CAP_SYS_RAWIO
))
605 return ide_task_ioctl(drive
, cmd
, arg
);
607 if (!capable(CAP_SYS_ADMIN
))
609 return ide_set_nice_ioctl(drive
, arg
);
610 case HDIO_DRIVE_RESET
:
611 if (!capable(CAP_SYS_ADMIN
))
614 return generic_drive_reset(drive
);
616 case HDIO_GET_BUSSTATE
:
617 if (!capable(CAP_SYS_ADMIN
))
619 if (put_user(BUSSTATE_ON
, (long __user
*)arg
))
623 case HDIO_SET_BUSSTATE
:
624 if (!capable(CAP_SYS_ADMIN
))
631 EXPORT_SYMBOL(generic_ide_ioctl
);
633 int ide_setting_ioctl(ide_drive_t
*drive
, struct block_device
*bdev
,
634 unsigned int cmd
, unsigned long arg
,
635 const struct ide_ioctl_devset
*s
)
638 int err
= -EOPNOTSUPP
;
640 for (; s
->get_ioctl
; s
++) {
641 if (s
->get
&& s
->get_ioctl
== cmd
)
643 else if (s
->set
&& s
->set_ioctl
== cmd
)
650 mutex_lock(&ide_setting_mtx
);
651 spin_lock_irqsave(&ide_lock
, flags
);
653 spin_unlock_irqrestore(&ide_lock
, flags
);
654 mutex_unlock(&ide_setting_mtx
);
655 return err
>= 0 ? put_user(err
, (long __user
*)arg
) : err
;
658 if (bdev
!= bdev
->bd_contains
)
661 if (!capable(CAP_SYS_ADMIN
))
664 mutex_lock(&ide_setting_mtx
);
665 err
= s
->set(drive
, arg
);
666 mutex_unlock(&ide_setting_mtx
);
671 EXPORT_SYMBOL_GPL(ide_setting_ioctl
);
674 * ide_device_get - get an additional reference to a ide_drive_t
675 * @drive: device to get a reference to
677 * Gets a reference to the ide_drive_t and increments the use count of the
678 * underlying LLDD module.
680 int ide_device_get(ide_drive_t
*drive
)
682 struct device
*host_dev
;
683 struct module
*module
;
685 if (!get_device(&drive
->gendev
))
688 host_dev
= drive
->hwif
->host
->dev
[0];
689 module
= host_dev
? host_dev
->driver
->owner
: NULL
;
691 if (module
&& !try_module_get(module
)) {
692 put_device(&drive
->gendev
);
698 EXPORT_SYMBOL_GPL(ide_device_get
);
701 * ide_device_put - release a reference to a ide_drive_t
702 * @drive: device to release a reference on
704 * Release a reference to the ide_drive_t and decrements the use count of
705 * the underlying LLDD module.
707 void ide_device_put(ide_drive_t
*drive
)
709 #ifdef CONFIG_MODULE_UNLOAD
710 struct device
*host_dev
= drive
->hwif
->host
->dev
[0];
711 struct module
*module
= host_dev
? host_dev
->driver
->owner
: NULL
;
716 put_device(&drive
->gendev
);
718 EXPORT_SYMBOL_GPL(ide_device_put
);
720 static int ide_bus_match(struct device
*dev
, struct device_driver
*drv
)
725 static char *media_string(ide_drive_t
*drive
)
727 switch (drive
->media
) {
743 static ssize_t
media_show(struct device
*dev
, struct device_attribute
*attr
, char *buf
)
745 ide_drive_t
*drive
= to_ide_device(dev
);
746 return sprintf(buf
, "%s\n", media_string(drive
));
749 static ssize_t
drivename_show(struct device
*dev
, struct device_attribute
*attr
, char *buf
)
751 ide_drive_t
*drive
= to_ide_device(dev
);
752 return sprintf(buf
, "%s\n", drive
->name
);
755 static ssize_t
modalias_show(struct device
*dev
, struct device_attribute
*attr
, char *buf
)
757 ide_drive_t
*drive
= to_ide_device(dev
);
758 return sprintf(buf
, "ide:m-%s\n", media_string(drive
));
761 static ssize_t
model_show(struct device
*dev
, struct device_attribute
*attr
,
764 ide_drive_t
*drive
= to_ide_device(dev
);
765 return sprintf(buf
, "%s\n", (char *)&drive
->id
[ATA_ID_PROD
]);
768 static ssize_t
firmware_show(struct device
*dev
, struct device_attribute
*attr
,
771 ide_drive_t
*drive
= to_ide_device(dev
);
772 return sprintf(buf
, "%s\n", (char *)&drive
->id
[ATA_ID_FW_REV
]);
775 static ssize_t
serial_show(struct device
*dev
, struct device_attribute
*attr
,
778 ide_drive_t
*drive
= to_ide_device(dev
);
779 return sprintf(buf
, "%s\n", (char *)&drive
->id
[ATA_ID_SERNO
]);
782 static struct device_attribute ide_dev_attrs
[] = {
784 __ATTR_RO(drivename
),
788 __ATTR(serial
, 0400, serial_show
, NULL
),
792 static int ide_uevent(struct device
*dev
, struct kobj_uevent_env
*env
)
794 ide_drive_t
*drive
= to_ide_device(dev
);
796 add_uevent_var(env
, "MEDIA=%s", media_string(drive
));
797 add_uevent_var(env
, "DRIVENAME=%s", drive
->name
);
798 add_uevent_var(env
, "MODALIAS=ide:m-%s", media_string(drive
));
802 static int generic_ide_probe(struct device
*dev
)
804 ide_drive_t
*drive
= to_ide_device(dev
);
805 ide_driver_t
*drv
= to_ide_driver(dev
->driver
);
807 return drv
->probe
? drv
->probe(drive
) : -ENODEV
;
810 static int generic_ide_remove(struct device
*dev
)
812 ide_drive_t
*drive
= to_ide_device(dev
);
813 ide_driver_t
*drv
= to_ide_driver(dev
->driver
);
821 static void generic_ide_shutdown(struct device
*dev
)
823 ide_drive_t
*drive
= to_ide_device(dev
);
824 ide_driver_t
*drv
= to_ide_driver(dev
->driver
);
826 if (dev
->driver
&& drv
->shutdown
)
827 drv
->shutdown(drive
);
830 struct bus_type ide_bus_type
= {
832 .match
= ide_bus_match
,
833 .uevent
= ide_uevent
,
834 .probe
= generic_ide_probe
,
835 .remove
= generic_ide_remove
,
836 .shutdown
= generic_ide_shutdown
,
837 .dev_attrs
= ide_dev_attrs
,
838 .suspend
= generic_ide_suspend
,
839 .resume
= generic_ide_resume
,
842 EXPORT_SYMBOL_GPL(ide_bus_type
);
845 EXPORT_SYMBOL_GPL(ide_vlb_clk
);
847 module_param_named(vlb_clock
, ide_vlb_clk
, int, 0);
848 MODULE_PARM_DESC(vlb_clock
, "VLB clock frequency (in MHz)");
851 EXPORT_SYMBOL_GPL(ide_pci_clk
);
853 module_param_named(pci_clock
, ide_pci_clk
, int, 0);
854 MODULE_PARM_DESC(pci_clock
, "PCI bus clock frequency (in MHz)");
856 static int ide_set_dev_param_mask(const char *s
, struct kernel_param
*kp
)
859 unsigned int *dev_param_mask
= (unsigned int *)kp
->arg
;
861 if (sscanf(s
, "%d.%d:%d", &a
, &b
, &j
) != 3 &&
862 sscanf(s
, "%d.%d", &a
, &b
) != 2)
865 i
= a
* MAX_DRIVES
+ b
;
867 if (i
>= MAX_HWIFS
* MAX_DRIVES
|| j
< 0 || j
> 1)
871 *dev_param_mask
|= (1 << i
);
873 *dev_param_mask
&= (1 << i
);
878 static unsigned int ide_nodma
;
880 module_param_call(nodma
, ide_set_dev_param_mask
, NULL
, &ide_nodma
, 0);
881 MODULE_PARM_DESC(nodma
, "disallow DMA for a device");
883 static unsigned int ide_noflush
;
885 module_param_call(noflush
, ide_set_dev_param_mask
, NULL
, &ide_noflush
, 0);
886 MODULE_PARM_DESC(noflush
, "disable flush requests for a device");
888 static unsigned int ide_noprobe
;
890 module_param_call(noprobe
, ide_set_dev_param_mask
, NULL
, &ide_noprobe
, 0);
891 MODULE_PARM_DESC(noprobe
, "skip probing for a device");
893 static unsigned int ide_nowerr
;
895 module_param_call(nowerr
, ide_set_dev_param_mask
, NULL
, &ide_nowerr
, 0);
896 MODULE_PARM_DESC(nowerr
, "ignore the ATA_DF bit for a device");
898 static unsigned int ide_cdroms
;
900 module_param_call(cdrom
, ide_set_dev_param_mask
, NULL
, &ide_cdroms
, 0);
901 MODULE_PARM_DESC(cdrom
, "force device as a CD-ROM");
909 static unsigned int ide_disks
;
910 static struct chs_geom ide_disks_chs
[MAX_HWIFS
* MAX_DRIVES
];
912 static int ide_set_disk_chs(const char *str
, struct kernel_param
*kp
)
914 int a
, b
, c
= 0, h
= 0, s
= 0, i
, j
= 1;
916 if (sscanf(str
, "%d.%d:%d,%d,%d", &a
, &b
, &c
, &h
, &s
) != 5 &&
917 sscanf(str
, "%d.%d:%d", &a
, &b
, &j
) != 3)
920 i
= a
* MAX_DRIVES
+ b
;
922 if (i
>= MAX_HWIFS
* MAX_DRIVES
|| j
< 0 || j
> 1)
925 if (c
> INT_MAX
|| h
> 255 || s
> 255)
929 ide_disks
|= (1 << i
);
931 ide_disks
&= (1 << i
);
933 ide_disks_chs
[i
].cyl
= c
;
934 ide_disks_chs
[i
].head
= h
;
935 ide_disks_chs
[i
].sect
= s
;
940 module_param_call(chs
, ide_set_disk_chs
, NULL
, NULL
, 0);
941 MODULE_PARM_DESC(chs
, "force device as a disk (using CHS)");
943 static void ide_dev_apply_params(ide_drive_t
*drive
)
945 int i
= drive
->hwif
->index
* MAX_DRIVES
+ drive
->select
.b
.unit
;
947 if (ide_nodma
& (1 << i
)) {
948 printk(KERN_INFO
"ide: disallowing DMA for %s\n", drive
->name
);
951 if (ide_noflush
& (1 << i
)) {
952 printk(KERN_INFO
"ide: disabling flush requests for %s\n",
956 if (ide_noprobe
& (1 << i
)) {
957 printk(KERN_INFO
"ide: skipping probe for %s\n", drive
->name
);
960 if (ide_nowerr
& (1 << i
)) {
961 printk(KERN_INFO
"ide: ignoring the ATA_DF bit for %s\n",
963 drive
->bad_wstat
= BAD_R_STAT
;
965 if (ide_cdroms
& (1 << i
)) {
966 printk(KERN_INFO
"ide: forcing %s as a CD-ROM\n", drive
->name
);
968 drive
->media
= ide_cdrom
;
969 /* an ATAPI device ignores DRDY */
970 drive
->ready_stat
= 0;
972 if (ide_disks
& (1 << i
)) {
973 drive
->cyl
= drive
->bios_cyl
= ide_disks_chs
[i
].cyl
;
974 drive
->head
= drive
->bios_head
= ide_disks_chs
[i
].head
;
975 drive
->sect
= drive
->bios_sect
= ide_disks_chs
[i
].sect
;
976 drive
->forced_geom
= 1;
977 printk(KERN_INFO
"ide: forcing %s as a disk (%d/%d/%d)\n",
979 drive
->cyl
, drive
->head
, drive
->sect
);
981 drive
->media
= ide_disk
;
982 drive
->ready_stat
= ATA_DRDY
;
986 static unsigned int ide_ignore_cable
;
988 static int ide_set_ignore_cable(const char *s
, struct kernel_param
*kp
)
992 if (sscanf(s
, "%d:%d", &i
, &j
) != 2 && sscanf(s
, "%d", &i
) != 1)
995 if (i
>= MAX_HWIFS
|| j
< 0 || j
> 1)
999 ide_ignore_cable
|= (1 << i
);
1001 ide_ignore_cable
&= (1 << i
);
1006 module_param_call(ignore_cable
, ide_set_ignore_cable
, NULL
, NULL
, 0);
1007 MODULE_PARM_DESC(ignore_cable
, "ignore cable detection");
1009 void ide_port_apply_params(ide_hwif_t
*hwif
)
1013 if (ide_ignore_cable
& (1 << hwif
->index
)) {
1014 printk(KERN_INFO
"ide: ignoring cable detection for %s\n",
1016 hwif
->cbl
= ATA_CBL_PATA40_SHORT
;
1019 for (i
= 0; i
< MAX_DRIVES
; i
++)
1020 ide_dev_apply_params(&hwif
->drives
[i
]);
1024 * This is gets invoked once during initialization, to set *everything* up
1026 static int __init
ide_init(void)
1030 printk(KERN_INFO
"Uniform Multi-Platform E-IDE driver\n");
1032 ret
= bus_register(&ide_bus_type
);
1034 printk(KERN_WARNING
"IDE: bus_register error: %d\n", ret
);
1038 ide_port_class
= class_create(THIS_MODULE
, "ide_port");
1039 if (IS_ERR(ide_port_class
)) {
1040 ret
= PTR_ERR(ide_port_class
);
1041 goto out_port_class
;
1049 bus_unregister(&ide_bus_type
);
1054 static void __exit
ide_exit(void)
1058 class_destroy(ide_port_class
);
1060 bus_unregister(&ide_bus_type
);
1063 module_init(ide_init
);
1064 module_exit(ide_exit
);
1066 MODULE_LICENSE("GPL");