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/interrupt.h>
54 #include <linux/major.h>
55 #include <linux/errno.h>
56 #include <linux/genhd.h>
57 #include <linux/slab.h>
58 #include <linux/init.h>
59 #include <linux/pci.h>
60 #include <linux/ide.h>
61 #include <linux/completion.h>
62 #include <linux/device.h>
65 /* default maximum number of failures */
66 #define IDE_DEFAULT_MAX_FAILURES 1
68 struct class *ide_port_class
;
70 static const u8 ide_hwif_to_major
[] = { IDE0_MAJOR
, IDE1_MAJOR
,
71 IDE2_MAJOR
, IDE3_MAJOR
,
72 IDE4_MAJOR
, IDE5_MAJOR
,
73 IDE6_MAJOR
, IDE7_MAJOR
,
74 IDE8_MAJOR
, IDE9_MAJOR
};
76 DEFINE_MUTEX(ide_cfg_mtx
);
78 __cacheline_aligned_in_smp
DEFINE_SPINLOCK(ide_lock
);
79 EXPORT_SYMBOL(ide_lock
);
81 static void ide_port_init_devices_data(ide_hwif_t
*);
84 * Do not even *think* about calling this!
86 void ide_init_port_data(ide_hwif_t
*hwif
, unsigned int index
)
88 /* bulk initialize hwif & drive info with zeros */
89 memset(hwif
, 0, sizeof(ide_hwif_t
));
91 /* fill in any non-zero initial values */
93 hwif
->major
= ide_hwif_to_major
[index
];
98 hwif
->name
[3] = '0' + index
;
100 hwif
->bus_state
= BUSSTATE_ON
;
102 init_completion(&hwif
->gendev_rel_comp
);
104 default_hwif_iops(hwif
);
105 default_hwif_transport(hwif
);
107 ide_port_init_devices_data(hwif
);
110 static void ide_port_init_devices_data(ide_hwif_t
*hwif
)
114 for (unit
= 0; unit
< MAX_DRIVES
; ++unit
) {
115 ide_drive_t
*drive
= &hwif
->drives
[unit
];
116 u8 j
= (hwif
->index
* MAX_DRIVES
) + unit
;
118 memset(drive
, 0, sizeof(*drive
));
120 drive
->media
= ide_disk
;
121 drive
->select
.all
= (unit
<<4)|0xa0;
123 drive
->ready_stat
= READY_STAT
;
124 drive
->bad_wstat
= BAD_W_STAT
;
125 drive
->special
.b
.recalibrate
= 1;
126 drive
->special
.b
.set_geometry
= 1;
127 drive
->name
[0] = 'h';
128 drive
->name
[1] = 'd';
129 drive
->name
[2] = 'a' + j
;
130 drive
->max_failures
= IDE_DEFAULT_MAX_FAILURES
;
132 INIT_LIST_HEAD(&drive
->list
);
133 init_completion(&drive
->gendev_rel_comp
);
137 void ide_remove_port_from_hwgroup(ide_hwif_t
*hwif
)
139 ide_hwgroup_t
*hwgroup
= hwif
->hwgroup
;
141 spin_lock_irq(&ide_lock
);
143 * Remove us from the hwgroup, and free
144 * the hwgroup if we were the only member
146 if (hwif
->next
== hwif
) {
147 BUG_ON(hwgroup
->hwif
!= hwif
);
150 /* There is another interface in hwgroup.
151 * Unlink us, and set hwgroup->drive and ->hwif to
154 ide_hwif_t
*g
= hwgroup
->hwif
;
156 while (g
->next
!= hwif
)
158 g
->next
= hwif
->next
;
159 if (hwgroup
->hwif
== hwif
) {
160 /* Chose a random hwif for hwgroup->hwif.
161 * It's guaranteed that there are no drives
162 * left in the hwgroup.
164 BUG_ON(hwgroup
->drive
!= NULL
);
167 BUG_ON(hwgroup
->hwif
== hwif
);
169 spin_unlock_irq(&ide_lock
);
172 /* Called with ide_lock held. */
173 static void __ide_port_unregister_devices(ide_hwif_t
*hwif
)
177 for (i
= 0; i
< MAX_DRIVES
; i
++) {
178 ide_drive_t
*drive
= &hwif
->drives
[i
];
180 if (drive
->present
) {
181 spin_unlock_irq(&ide_lock
);
182 device_unregister(&drive
->gendev
);
183 wait_for_completion(&drive
->gendev_rel_comp
);
184 spin_lock_irq(&ide_lock
);
189 void ide_port_unregister_devices(ide_hwif_t
*hwif
)
191 mutex_lock(&ide_cfg_mtx
);
192 spin_lock_irq(&ide_lock
);
193 __ide_port_unregister_devices(hwif
);
195 ide_port_init_devices_data(hwif
);
196 spin_unlock_irq(&ide_lock
);
197 mutex_unlock(&ide_cfg_mtx
);
199 EXPORT_SYMBOL_GPL(ide_port_unregister_devices
);
202 * ide_unregister - free an IDE interface
203 * @hwif: IDE interface
205 * Perform the final unregister of an IDE interface. At the moment
206 * we don't refcount interfaces so this will also get split up.
209 * The caller must not hold the IDE locks
210 * The drive present/vanishing is not yet properly locked
211 * Take care with the callbacks. These have been split to avoid
212 * deadlocking the IDE layer. The shutdown callback is called
213 * before we take the lock and free resources. It is up to the
214 * caller to be sure there is no pending I/O here, and that
215 * the interface will not be reopened (present/vanishing locking
216 * isn't yet done BTW). After we commit to the final kill we
217 * call the cleanup callback with the ide locks held.
219 * Unregister restores the hwif structures to the default state.
220 * This is raving bonkers.
223 void ide_unregister(ide_hwif_t
*hwif
)
226 ide_hwgroup_t
*hwgroup
;
229 BUG_ON(in_interrupt());
230 BUG_ON(irqs_disabled());
232 mutex_lock(&ide_cfg_mtx
);
234 spin_lock_irq(&ide_lock
);
236 __ide_port_unregister_devices(hwif
);
239 spin_unlock_irq(&ide_lock
);
241 ide_proc_unregister_port(hwif
);
243 hwgroup
= hwif
->hwgroup
;
245 * free the irq if we were the only hwif using it
249 if (g
->irq
== hwif
->irq
)
252 } while (g
!= hwgroup
->hwif
);
254 free_irq(hwif
->irq
, hwgroup
);
256 ide_remove_port_from_hwgroup(hwif
);
258 device_unregister(hwif
->portdev
);
259 device_unregister(&hwif
->gendev
);
260 wait_for_completion(&hwif
->gendev_rel_comp
);
263 * Remove us from the kernel's knowledge
265 blk_unregister_region(MKDEV(hwif
->major
, 0), MAX_DRIVES
<<PARTN_BITS
);
266 kfree(hwif
->sg_table
);
267 unregister_blkdev(hwif
->major
, hwif
->name
);
270 ide_release_dma_engine(hwif
);
272 spin_lock_irq(&ide_lock
);
273 /* restore hwif data to pristine status */
274 ide_init_port_data(hwif
, hwif
->index
);
275 spin_unlock_irq(&ide_lock
);
277 mutex_unlock(&ide_cfg_mtx
);
280 EXPORT_SYMBOL(ide_unregister
);
282 void ide_init_port_hw(ide_hwif_t
*hwif
, hw_regs_t
*hw
)
284 memcpy(&hwif
->io_ports
, &hw
->io_ports
, sizeof(hwif
->io_ports
));
286 hwif
->chipset
= hw
->chipset
;
288 hwif
->gendev
.parent
= hw
->parent
? hw
->parent
: hw
->dev
;
289 hwif
->ack_intr
= hw
->ack_intr
;
291 EXPORT_SYMBOL_GPL(ide_init_port_hw
);
294 * Locks for IDE setting functionality
297 DEFINE_MUTEX(ide_setting_mtx
);
299 EXPORT_SYMBOL_GPL(ide_setting_mtx
);
302 * ide_spin_wait_hwgroup - wait for group
303 * @drive: drive in the group
305 * Wait for an IDE device group to go non busy and then return
306 * holding the ide_lock which guards the hwgroup->busy status
307 * and right to use it.
310 int ide_spin_wait_hwgroup (ide_drive_t
*drive
)
312 ide_hwgroup_t
*hwgroup
= HWGROUP(drive
);
313 unsigned long timeout
= jiffies
+ (3 * HZ
);
315 spin_lock_irq(&ide_lock
);
317 while (hwgroup
->busy
) {
318 unsigned long lflags
;
319 spin_unlock_irq(&ide_lock
);
320 local_irq_set(lflags
);
321 if (time_after(jiffies
, timeout
)) {
322 local_irq_restore(lflags
);
323 printk(KERN_ERR
"%s: channel busy\n", drive
->name
);
326 local_irq_restore(lflags
);
327 spin_lock_irq(&ide_lock
);
332 EXPORT_SYMBOL(ide_spin_wait_hwgroup
);
334 int set_io_32bit(ide_drive_t
*drive
, int arg
)
336 if (drive
->no_io_32bit
)
339 if (arg
< 0 || arg
> 1 + (SUPPORT_VLB_SYNC
<< 1))
342 if (ide_spin_wait_hwgroup(drive
))
345 drive
->io_32bit
= arg
;
347 spin_unlock_irq(&ide_lock
);
352 static int set_ksettings(ide_drive_t
*drive
, int arg
)
354 if (arg
< 0 || arg
> 1)
357 if (ide_spin_wait_hwgroup(drive
))
359 drive
->keep_settings
= arg
;
360 spin_unlock_irq(&ide_lock
);
365 int set_using_dma(ide_drive_t
*drive
, int arg
)
367 #ifdef CONFIG_BLK_DEV_IDEDMA
368 ide_hwif_t
*hwif
= drive
->hwif
;
371 if (arg
< 0 || arg
> 1)
374 if (!drive
->id
|| !(drive
->id
->capability
& 1))
377 if (hwif
->dma_ops
== NULL
)
381 if (ide_spin_wait_hwgroup(drive
))
384 * set ->busy flag, unlock and let it ride
386 hwif
->hwgroup
->busy
= 1;
387 spin_unlock_irq(&ide_lock
);
392 if (ide_set_dma(drive
))
398 * lock, clear ->busy flag and unlock before leaving
400 spin_lock_irq(&ide_lock
);
401 hwif
->hwgroup
->busy
= 0;
402 spin_unlock_irq(&ide_lock
);
406 if (arg
< 0 || arg
> 1)
413 int set_pio_mode(ide_drive_t
*drive
, int arg
)
416 ide_hwif_t
*hwif
= drive
->hwif
;
417 const struct ide_port_ops
*port_ops
= hwif
->port_ops
;
419 if (arg
< 0 || arg
> 255)
422 if (port_ops
== NULL
|| port_ops
->set_pio_mode
== NULL
||
423 (hwif
->host_flags
& IDE_HFLAG_NO_SET_MODE
))
426 if (drive
->special
.b
.set_tune
)
429 rq
= blk_get_request(drive
->queue
, READ
, __GFP_WAIT
);
430 rq
->cmd_type
= REQ_TYPE_ATA_TASKFILE
;
432 drive
->tune_req
= (u8
) arg
;
433 drive
->special
.b
.set_tune
= 1;
435 blk_execute_rq(drive
->queue
, NULL
, rq
, 0);
441 static int set_unmaskirq(ide_drive_t
*drive
, int arg
)
443 if (drive
->no_unmask
)
446 if (arg
< 0 || arg
> 1)
449 if (ide_spin_wait_hwgroup(drive
))
452 spin_unlock_irq(&ide_lock
);
457 static int generic_ide_suspend(struct device
*dev
, pm_message_t mesg
)
459 ide_drive_t
*drive
= dev
->driver_data
;
460 ide_hwif_t
*hwif
= HWIF(drive
);
462 struct request_pm_state rqpm
;
466 /* Call ACPI _GTM only once */
467 if (!(drive
->dn
% 2))
468 ide_acpi_get_timing(hwif
);
470 memset(&rqpm
, 0, sizeof(rqpm
));
471 memset(&args
, 0, sizeof(args
));
472 rq
= blk_get_request(drive
->queue
, READ
, __GFP_WAIT
);
473 rq
->cmd_type
= REQ_TYPE_PM_SUSPEND
;
476 rqpm
.pm_step
= ide_pm_state_start_suspend
;
477 if (mesg
.event
== PM_EVENT_PRETHAW
)
478 mesg
.event
= PM_EVENT_FREEZE
;
479 rqpm
.pm_state
= mesg
.event
;
481 ret
= blk_execute_rq(drive
->queue
, NULL
, rq
, 0);
483 /* only call ACPI _PS3 after both drivers are suspended */
484 if (!ret
&& (((drive
->dn
% 2) && hwif
->drives
[0].present
485 && hwif
->drives
[1].present
)
486 || !hwif
->drives
[0].present
487 || !hwif
->drives
[1].present
))
488 ide_acpi_set_state(hwif
, 0);
492 static int generic_ide_resume(struct device
*dev
)
494 ide_drive_t
*drive
= dev
->driver_data
;
495 ide_hwif_t
*hwif
= HWIF(drive
);
497 struct request_pm_state rqpm
;
501 /* Call ACPI _STM only once */
502 if (!(drive
->dn
% 2)) {
503 ide_acpi_set_state(hwif
, 1);
504 ide_acpi_push_timing(hwif
);
507 ide_acpi_exec_tfs(drive
);
509 memset(&rqpm
, 0, sizeof(rqpm
));
510 memset(&args
, 0, sizeof(args
));
511 rq
= blk_get_request(drive
->queue
, READ
, __GFP_WAIT
);
512 rq
->cmd_type
= REQ_TYPE_PM_RESUME
;
513 rq
->cmd_flags
|= REQ_PREEMPT
;
516 rqpm
.pm_step
= ide_pm_state_start_resume
;
517 rqpm
.pm_state
= PM_EVENT_ON
;
519 err
= blk_execute_rq(drive
->queue
, NULL
, rq
, 1);
522 if (err
== 0 && dev
->driver
) {
523 ide_driver_t
*drv
= to_ide_driver(dev
->driver
);
532 static int generic_drive_reset(ide_drive_t
*drive
)
537 rq
= blk_get_request(drive
->queue
, READ
, __GFP_WAIT
);
538 rq
->cmd_type
= REQ_TYPE_SPECIAL
;
540 rq
->cmd
[0] = REQ_DRIVE_RESET
;
541 rq
->cmd_flags
|= REQ_SOFTBARRIER
;
542 if (blk_execute_rq(drive
->queue
, NULL
, rq
, 1))
548 int generic_ide_ioctl(ide_drive_t
*drive
, struct file
*file
, struct block_device
*bdev
,
549 unsigned int cmd
, unsigned long arg
)
553 void __user
*p
= (void __user
*)arg
;
554 int err
= 0, (*setfunc
)(ide_drive_t
*, int);
558 case HDIO_GET_32BIT
: val
= &drive
->io_32bit
; goto read_val
;
559 case HDIO_GET_KEEPSETTINGS
: val
= &drive
->keep_settings
; goto read_val
;
560 case HDIO_GET_UNMASKINTR
: val
= &drive
->unmask
; goto read_val
;
561 case HDIO_GET_DMA
: val
= &drive
->using_dma
; goto read_val
;
562 case HDIO_SET_32BIT
: setfunc
= set_io_32bit
; goto set_val
;
563 case HDIO_SET_KEEPSETTINGS
: setfunc
= set_ksettings
; goto set_val
;
564 case HDIO_SET_PIO_MODE
: setfunc
= set_pio_mode
; goto set_val
;
565 case HDIO_SET_UNMASKINTR
: setfunc
= set_unmaskirq
; goto set_val
;
566 case HDIO_SET_DMA
: setfunc
= set_using_dma
; goto set_val
;
570 case HDIO_OBSOLETE_IDENTITY
:
571 case HDIO_GET_IDENTITY
:
572 if (bdev
!= bdev
->bd_contains
)
574 if (drive
->id_read
== 0)
576 if (copy_to_user(p
, drive
->id
, (cmd
== HDIO_GET_IDENTITY
) ? sizeof(*drive
->id
) : 142))
581 return put_user(drive
->dsc_overlap
<< IDE_NICE_DSC_OVERLAP
|
582 drive
->atapi_overlap
<< IDE_NICE_ATAPI_OVERLAP
|
583 drive
->nice1
<< IDE_NICE_1
,
584 (long __user
*) 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
)) return -EACCES
;
608 if (arg
!= (arg
& ((1 << IDE_NICE_DSC_OVERLAP
) | (1 << IDE_NICE_1
))))
610 drive
->dsc_overlap
= (arg
>> IDE_NICE_DSC_OVERLAP
) & 1;
611 drv
= *(ide_driver_t
**)bdev
->bd_disk
->private_data
;
612 if (drive
->dsc_overlap
&& !drv
->supports_dsc_overlap
) {
613 drive
->dsc_overlap
= 0;
616 drive
->nice1
= (arg
>> IDE_NICE_1
) & 1;
618 case HDIO_DRIVE_RESET
:
619 if (!capable(CAP_SYS_ADMIN
))
622 return generic_drive_reset(drive
);
624 case HDIO_GET_BUSSTATE
:
625 if (!capable(CAP_SYS_ADMIN
))
627 if (put_user(HWIF(drive
)->bus_state
, (long __user
*)arg
))
631 case HDIO_SET_BUSSTATE
:
632 if (!capable(CAP_SYS_ADMIN
))
640 mutex_lock(&ide_setting_mtx
);
641 spin_lock_irqsave(&ide_lock
, flags
);
643 spin_unlock_irqrestore(&ide_lock
, flags
);
644 mutex_unlock(&ide_setting_mtx
);
645 return err
>= 0 ? put_user(err
, (long __user
*)arg
) : err
;
648 if (bdev
!= bdev
->bd_contains
)
651 if (!capable(CAP_SYS_ADMIN
))
654 mutex_lock(&ide_setting_mtx
);
655 err
= setfunc(drive
, arg
);
656 mutex_unlock(&ide_setting_mtx
);
662 EXPORT_SYMBOL(generic_ide_ioctl
);
664 static int ide_bus_match(struct device
*dev
, struct device_driver
*drv
)
669 static char *media_string(ide_drive_t
*drive
)
671 switch (drive
->media
) {
687 static ssize_t
media_show(struct device
*dev
, struct device_attribute
*attr
, char *buf
)
689 ide_drive_t
*drive
= to_ide_device(dev
);
690 return sprintf(buf
, "%s\n", media_string(drive
));
693 static ssize_t
drivename_show(struct device
*dev
, struct device_attribute
*attr
, char *buf
)
695 ide_drive_t
*drive
= to_ide_device(dev
);
696 return sprintf(buf
, "%s\n", drive
->name
);
699 static ssize_t
modalias_show(struct device
*dev
, struct device_attribute
*attr
, char *buf
)
701 ide_drive_t
*drive
= to_ide_device(dev
);
702 return sprintf(buf
, "ide:m-%s\n", media_string(drive
));
705 static ssize_t
model_show(struct device
*dev
, struct device_attribute
*attr
,
708 ide_drive_t
*drive
= to_ide_device(dev
);
709 return sprintf(buf
, "%s\n", drive
->id
->model
);
712 static ssize_t
firmware_show(struct device
*dev
, struct device_attribute
*attr
,
715 ide_drive_t
*drive
= to_ide_device(dev
);
716 return sprintf(buf
, "%s\n", drive
->id
->fw_rev
);
719 static ssize_t
serial_show(struct device
*dev
, struct device_attribute
*attr
,
722 ide_drive_t
*drive
= to_ide_device(dev
);
723 return sprintf(buf
, "%s\n", drive
->id
->serial_no
);
726 static struct device_attribute ide_dev_attrs
[] = {
728 __ATTR_RO(drivename
),
732 __ATTR(serial
, 0400, serial_show
, NULL
),
736 static int ide_uevent(struct device
*dev
, struct kobj_uevent_env
*env
)
738 ide_drive_t
*drive
= to_ide_device(dev
);
740 add_uevent_var(env
, "MEDIA=%s", media_string(drive
));
741 add_uevent_var(env
, "DRIVENAME=%s", drive
->name
);
742 add_uevent_var(env
, "MODALIAS=ide:m-%s", media_string(drive
));
746 static int generic_ide_probe(struct device
*dev
)
748 ide_drive_t
*drive
= to_ide_device(dev
);
749 ide_driver_t
*drv
= to_ide_driver(dev
->driver
);
751 return drv
->probe
? drv
->probe(drive
) : -ENODEV
;
754 static int generic_ide_remove(struct device
*dev
)
756 ide_drive_t
*drive
= to_ide_device(dev
);
757 ide_driver_t
*drv
= to_ide_driver(dev
->driver
);
765 static void generic_ide_shutdown(struct device
*dev
)
767 ide_drive_t
*drive
= to_ide_device(dev
);
768 ide_driver_t
*drv
= to_ide_driver(dev
->driver
);
770 if (dev
->driver
&& drv
->shutdown
)
771 drv
->shutdown(drive
);
774 struct bus_type ide_bus_type
= {
776 .match
= ide_bus_match
,
777 .uevent
= ide_uevent
,
778 .probe
= generic_ide_probe
,
779 .remove
= generic_ide_remove
,
780 .shutdown
= generic_ide_shutdown
,
781 .dev_attrs
= ide_dev_attrs
,
782 .suspend
= generic_ide_suspend
,
783 .resume
= generic_ide_resume
,
786 EXPORT_SYMBOL_GPL(ide_bus_type
);
789 EXPORT_SYMBOL_GPL(ide_vlb_clk
);
791 module_param_named(vlb_clock
, ide_vlb_clk
, int, 0);
792 MODULE_PARM_DESC(vlb_clock
, "VLB clock frequency (in MHz)");
795 EXPORT_SYMBOL_GPL(ide_pci_clk
);
797 module_param_named(pci_clock
, ide_pci_clk
, int, 0);
798 MODULE_PARM_DESC(pci_clock
, "PCI bus clock frequency (in MHz)");
800 static int ide_set_dev_param_mask(const char *s
, struct kernel_param
*kp
)
803 unsigned int *dev_param_mask
= (unsigned int *)kp
->arg
;
805 if (sscanf(s
, "%d.%d:%d", &a
, &b
, &j
) != 3 &&
806 sscanf(s
, "%d.%d", &a
, &b
) != 2)
809 i
= a
* MAX_DRIVES
+ b
;
811 if (i
>= MAX_HWIFS
* MAX_DRIVES
|| j
< 0 || j
> 1)
815 *dev_param_mask
|= (1 << i
);
817 *dev_param_mask
&= (1 << i
);
822 static unsigned int ide_nodma
;
824 module_param_call(nodma
, ide_set_dev_param_mask
, NULL
, &ide_nodma
, 0);
825 MODULE_PARM_DESC(nodma
, "disallow DMA for a device");
827 static unsigned int ide_noflush
;
829 module_param_call(noflush
, ide_set_dev_param_mask
, NULL
, &ide_noflush
, 0);
830 MODULE_PARM_DESC(noflush
, "disable flush requests for a device");
832 static unsigned int ide_noprobe
;
834 module_param_call(noprobe
, ide_set_dev_param_mask
, NULL
, &ide_noprobe
, 0);
835 MODULE_PARM_DESC(noprobe
, "skip probing for a device");
837 static unsigned int ide_nowerr
;
839 module_param_call(nowerr
, ide_set_dev_param_mask
, NULL
, &ide_nowerr
, 0);
840 MODULE_PARM_DESC(nowerr
, "ignore the WRERR_STAT bit for a device");
842 static unsigned int ide_cdroms
;
844 module_param_call(cdrom
, ide_set_dev_param_mask
, NULL
, &ide_cdroms
, 0);
845 MODULE_PARM_DESC(cdrom
, "force device as a CD-ROM");
853 static unsigned int ide_disks
;
854 static struct chs_geom ide_disks_chs
[MAX_HWIFS
* MAX_DRIVES
];
856 static int ide_set_disk_chs(const char *str
, struct kernel_param
*kp
)
858 int a
, b
, c
= 0, h
= 0, s
= 0, i
, j
= 1;
860 if (sscanf(str
, "%d.%d:%d,%d,%d", &a
, &b
, &c
, &h
, &s
) != 5 &&
861 sscanf(str
, "%d.%d:%d", &a
, &b
, &j
) != 3)
864 i
= a
* MAX_DRIVES
+ b
;
866 if (i
>= MAX_HWIFS
* MAX_DRIVES
|| j
< 0 || j
> 1)
869 if (c
> INT_MAX
|| h
> 255 || s
> 255)
873 ide_disks
|= (1 << i
);
875 ide_disks
&= (1 << i
);
877 ide_disks_chs
[i
].cyl
= c
;
878 ide_disks_chs
[i
].head
= h
;
879 ide_disks_chs
[i
].sect
= s
;
884 module_param_call(chs
, ide_set_disk_chs
, NULL
, NULL
, 0);
885 MODULE_PARM_DESC(chs
, "force device as a disk (using CHS)");
887 static void ide_dev_apply_params(ide_drive_t
*drive
)
889 int i
= drive
->hwif
->index
* MAX_DRIVES
+ drive
->select
.b
.unit
;
891 if (ide_nodma
& (1 << i
)) {
892 printk(KERN_INFO
"ide: disallowing DMA for %s\n", drive
->name
);
895 if (ide_noflush
& (1 << i
)) {
896 printk(KERN_INFO
"ide: disabling flush requests for %s\n",
900 if (ide_noprobe
& (1 << i
)) {
901 printk(KERN_INFO
"ide: skipping probe for %s\n", drive
->name
);
904 if (ide_nowerr
& (1 << i
)) {
905 printk(KERN_INFO
"ide: ignoring the WRERR_STAT bit for %s\n",
907 drive
->bad_wstat
= BAD_R_STAT
;
909 if (ide_cdroms
& (1 << i
)) {
910 printk(KERN_INFO
"ide: forcing %s as a CD-ROM\n", drive
->name
);
912 drive
->media
= ide_cdrom
;
913 /* an ATAPI device ignores DRDY */
914 drive
->ready_stat
= 0;
916 if (ide_disks
& (1 << i
)) {
917 drive
->cyl
= drive
->bios_cyl
= ide_disks_chs
[i
].cyl
;
918 drive
->head
= drive
->bios_head
= ide_disks_chs
[i
].head
;
919 drive
->sect
= drive
->bios_sect
= ide_disks_chs
[i
].sect
;
920 drive
->forced_geom
= 1;
921 printk(KERN_INFO
"ide: forcing %s as a disk (%d/%d/%d)\n",
923 drive
->cyl
, drive
->head
, drive
->sect
);
925 drive
->media
= ide_disk
;
926 drive
->ready_stat
= READY_STAT
;
930 static unsigned int ide_ignore_cable
;
932 static int ide_set_ignore_cable(const char *s
, struct kernel_param
*kp
)
936 if (sscanf(s
, "%d:%d", &i
, &j
) != 2 && sscanf(s
, "%d", &i
) != 1)
939 if (i
>= MAX_HWIFS
|| j
< 0 || j
> 1)
943 ide_ignore_cable
|= (1 << i
);
945 ide_ignore_cable
&= (1 << i
);
950 module_param_call(ignore_cable
, ide_set_ignore_cable
, NULL
, NULL
, 0);
951 MODULE_PARM_DESC(ignore_cable
, "ignore cable detection");
953 void ide_port_apply_params(ide_hwif_t
*hwif
)
957 if (ide_ignore_cable
& (1 << hwif
->index
)) {
958 printk(KERN_INFO
"ide: ignoring cable detection for %s\n",
960 hwif
->cbl
= ATA_CBL_PATA40_SHORT
;
963 for (i
= 0; i
< MAX_DRIVES
; i
++)
964 ide_dev_apply_params(&hwif
->drives
[i
]);
968 * This is gets invoked once during initialization, to set *everything* up
970 static int __init
ide_init(void)
974 printk(KERN_INFO
"Uniform Multi-Platform E-IDE driver\n");
976 ret
= bus_register(&ide_bus_type
);
978 printk(KERN_WARNING
"IDE: bus_register error: %d\n", ret
);
982 ide_port_class
= class_create(THIS_MODULE
, "ide_port");
983 if (IS_ERR(ide_port_class
)) {
984 ret
= PTR_ERR(ide_port_class
);
993 bus_unregister(&ide_bus_type
);
998 static void __exit
ide_exit(void)
1002 class_destroy(ide_port_class
);
1004 bus_unregister(&ide_bus_type
);
1007 module_init(ide_init
);
1008 module_exit(ide_exit
);
1010 MODULE_LICENSE("GPL");