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 static int idebus_parameter
; /* holds the "idebus=" parameter */
90 static int system_bus_speed
; /* holds what we think is VESA/PCI bus speed */
92 DEFINE_MUTEX(ide_cfg_mtx
);
93 __cacheline_aligned_in_smp
DEFINE_SPINLOCK(ide_lock
);
97 ide_hwif_t ide_hwifs
[MAX_HWIFS
]; /* master data repository */
99 static void ide_port_init_devices_data(ide_hwif_t
*);
102 * Do not even *think* about calling this!
104 void ide_init_port_data(ide_hwif_t
*hwif
, unsigned int index
)
106 /* bulk initialize hwif & drive info with zeros */
107 memset(hwif
, 0, sizeof(ide_hwif_t
));
109 /* fill in any non-zero initial values */
111 hwif
->major
= ide_hwif_to_major
[index
];
116 hwif
->name
[3] = '0' + index
;
118 hwif
->bus_state
= BUSSTATE_ON
;
120 init_completion(&hwif
->gendev_rel_comp
);
122 default_hwif_iops(hwif
);
123 default_hwif_transport(hwif
);
125 ide_port_init_devices_data(hwif
);
127 EXPORT_SYMBOL_GPL(ide_init_port_data
);
129 static void ide_port_init_devices_data(ide_hwif_t
*hwif
)
133 for (unit
= 0; unit
< MAX_DRIVES
; ++unit
) {
134 ide_drive_t
*drive
= &hwif
->drives
[unit
];
135 u8 j
= (hwif
->index
* MAX_DRIVES
) + unit
;
137 memset(drive
, 0, sizeof(*drive
));
139 drive
->media
= ide_disk
;
140 drive
->select
.all
= (unit
<<4)|0xa0;
143 drive
->ready_stat
= READY_STAT
;
144 drive
->bad_wstat
= BAD_W_STAT
;
145 drive
->special
.b
.recalibrate
= 1;
146 drive
->special
.b
.set_geometry
= 1;
147 drive
->name
[0] = 'h';
148 drive
->name
[1] = 'd';
149 drive
->name
[2] = 'a' + j
;
150 drive
->max_failures
= IDE_DEFAULT_MAX_FAILURES
;
152 INIT_LIST_HEAD(&drive
->list
);
153 init_completion(&drive
->gendev_rel_comp
);
158 * init_ide_data() sets reasonable default values into all fields
159 * of all instances of the hwifs and drives, but only on the first call.
160 * Subsequent calls have no effect (they don't wipe out anything).
162 * This routine is normally called at driver initialization time,
163 * but may also be called MUCH earlier during kernel "command-line"
164 * parameter processing. As such, we cannot depend on any other parts
165 * of the kernel (such as memory allocation) to be functioning yet.
167 * This is too bad, as otherwise we could dynamically allocate the
168 * ide_drive_t structs as needed, rather than always consuming memory
169 * for the max possible number (MAX_HWIFS * MAX_DRIVES) of them.
171 * FIXME: We should stuff the setup data into __init and copy the
172 * relevant hwifs/allocate them properly during boot.
174 #define MAGIC_COOKIE 0x12345678
175 static void __init
init_ide_data (void)
178 static unsigned long magic_cookie
= MAGIC_COOKIE
;
180 if (magic_cookie
!= MAGIC_COOKIE
)
181 return; /* already initialized */
184 /* Initialise all interface structures */
185 for (index
= 0; index
< MAX_HWIFS
; ++index
) {
186 ide_hwif_t
*hwif
= &ide_hwifs
[index
];
188 ide_init_port_data(hwif
, index
);
193 * ide_system_bus_speed - guess bus speed
195 * ide_system_bus_speed() returns what we think is the system VESA/PCI
196 * bus speed (in MHz). This is used for calculating interface PIO timings.
197 * The default is 40 for known PCI systems, 50 otherwise.
198 * The "idebus=xx" parameter can be used to override this value.
199 * The actual value to be used is computed/displayed the first time
200 * through. Drivers should only use this as a last resort.
202 * Returns a guessed speed in MHz.
205 static int ide_system_bus_speed(void)
208 static struct pci_device_id pci_default
[] = {
209 { PCI_DEVICE(PCI_ANY_ID
, PCI_ANY_ID
) },
213 #define pci_default 0
214 #endif /* CONFIG_PCI */
216 /* user supplied value */
217 if (idebus_parameter
)
218 return idebus_parameter
;
220 /* safe default value for PCI or VESA and PCI*/
221 return pci_dev_present(pci_default
) ? 33 : 50;
224 void ide_remove_port_from_hwgroup(ide_hwif_t
*hwif
)
226 ide_hwgroup_t
*hwgroup
= hwif
->hwgroup
;
228 spin_lock_irq(&ide_lock
);
230 * Remove us from the hwgroup, and free
231 * the hwgroup if we were the only member
233 if (hwif
->next
== hwif
) {
234 BUG_ON(hwgroup
->hwif
!= hwif
);
237 /* There is another interface in hwgroup.
238 * Unlink us, and set hwgroup->drive and ->hwif to
241 ide_hwif_t
*g
= hwgroup
->hwif
;
243 while (g
->next
!= hwif
)
245 g
->next
= hwif
->next
;
246 if (hwgroup
->hwif
== hwif
) {
247 /* Chose a random hwif for hwgroup->hwif.
248 * It's guaranteed that there are no drives
249 * left in the hwgroup.
251 BUG_ON(hwgroup
->drive
!= NULL
);
254 BUG_ON(hwgroup
->hwif
== hwif
);
256 spin_unlock_irq(&ide_lock
);
259 /* Called with ide_lock held. */
260 static void __ide_port_unregister_devices(ide_hwif_t
*hwif
)
264 for (i
= 0; i
< MAX_DRIVES
; i
++) {
265 ide_drive_t
*drive
= &hwif
->drives
[i
];
267 if (drive
->present
) {
268 spin_unlock_irq(&ide_lock
);
269 device_unregister(&drive
->gendev
);
270 wait_for_completion(&drive
->gendev_rel_comp
);
271 spin_lock_irq(&ide_lock
);
276 void ide_port_unregister_devices(ide_hwif_t
*hwif
)
278 mutex_lock(&ide_cfg_mtx
);
279 spin_lock_irq(&ide_lock
);
280 __ide_port_unregister_devices(hwif
);
282 ide_port_init_devices_data(hwif
);
283 spin_unlock_irq(&ide_lock
);
284 mutex_unlock(&ide_cfg_mtx
);
286 EXPORT_SYMBOL_GPL(ide_port_unregister_devices
);
289 * ide_unregister - free an IDE interface
290 * @hwif: IDE interface
292 * Perform the final unregister of an IDE interface. At the moment
293 * we don't refcount interfaces so this will also get split up.
296 * The caller must not hold the IDE locks
297 * The drive present/vanishing is not yet properly locked
298 * Take care with the callbacks. These have been split to avoid
299 * deadlocking the IDE layer. The shutdown callback is called
300 * before we take the lock and free resources. It is up to the
301 * caller to be sure there is no pending I/O here, and that
302 * the interface will not be reopened (present/vanishing locking
303 * isn't yet done BTW). After we commit to the final kill we
304 * call the cleanup callback with the ide locks held.
306 * Unregister restores the hwif structures to the default state.
307 * This is raving bonkers.
310 void ide_unregister(ide_hwif_t
*hwif
)
313 ide_hwgroup_t
*hwgroup
;
316 BUG_ON(in_interrupt());
317 BUG_ON(irqs_disabled());
319 mutex_lock(&ide_cfg_mtx
);
321 spin_lock_irq(&ide_lock
);
323 __ide_port_unregister_devices(hwif
);
326 spin_unlock_irq(&ide_lock
);
328 ide_proc_unregister_port(hwif
);
330 hwgroup
= hwif
->hwgroup
;
332 * free the irq if we were the only hwif using it
336 if (g
->irq
== hwif
->irq
)
339 } while (g
!= hwgroup
->hwif
);
341 free_irq(hwif
->irq
, hwgroup
);
343 ide_remove_port_from_hwgroup(hwif
);
345 device_unregister(hwif
->portdev
);
346 device_unregister(&hwif
->gendev
);
347 wait_for_completion(&hwif
->gendev_rel_comp
);
350 * Remove us from the kernel's knowledge
352 blk_unregister_region(MKDEV(hwif
->major
, 0), MAX_DRIVES
<<PARTN_BITS
);
353 kfree(hwif
->sg_table
);
354 unregister_blkdev(hwif
->major
, hwif
->name
);
357 ide_release_dma_engine(hwif
);
359 spin_lock_irq(&ide_lock
);
360 /* restore hwif data to pristine status */
361 ide_init_port_data(hwif
, hwif
->index
);
362 spin_unlock_irq(&ide_lock
);
364 mutex_unlock(&ide_cfg_mtx
);
367 EXPORT_SYMBOL(ide_unregister
);
369 void ide_init_port_hw(ide_hwif_t
*hwif
, hw_regs_t
*hw
)
371 memcpy(&hwif
->io_ports
, &hw
->io_ports
, sizeof(hwif
->io_ports
));
373 hwif
->chipset
= hw
->chipset
;
374 hwif
->gendev
.parent
= hw
->dev
;
375 hwif
->ack_intr
= hw
->ack_intr
;
377 EXPORT_SYMBOL_GPL(ide_init_port_hw
);
380 * Locks for IDE setting functionality
383 DEFINE_MUTEX(ide_setting_mtx
);
385 EXPORT_SYMBOL_GPL(ide_setting_mtx
);
388 * ide_spin_wait_hwgroup - wait for group
389 * @drive: drive in the group
391 * Wait for an IDE device group to go non busy and then return
392 * holding the ide_lock which guards the hwgroup->busy status
393 * and right to use it.
396 int ide_spin_wait_hwgroup (ide_drive_t
*drive
)
398 ide_hwgroup_t
*hwgroup
= HWGROUP(drive
);
399 unsigned long timeout
= jiffies
+ (3 * HZ
);
401 spin_lock_irq(&ide_lock
);
403 while (hwgroup
->busy
) {
404 unsigned long lflags
;
405 spin_unlock_irq(&ide_lock
);
406 local_irq_set(lflags
);
407 if (time_after(jiffies
, timeout
)) {
408 local_irq_restore(lflags
);
409 printk(KERN_ERR
"%s: channel busy\n", drive
->name
);
412 local_irq_restore(lflags
);
413 spin_lock_irq(&ide_lock
);
418 EXPORT_SYMBOL(ide_spin_wait_hwgroup
);
420 int set_io_32bit(ide_drive_t
*drive
, int arg
)
422 if (drive
->no_io_32bit
)
425 if (arg
< 0 || arg
> 1 + (SUPPORT_VLB_SYNC
<< 1))
428 if (ide_spin_wait_hwgroup(drive
))
431 drive
->io_32bit
= arg
;
433 spin_unlock_irq(&ide_lock
);
438 static int set_ksettings(ide_drive_t
*drive
, int arg
)
440 if (arg
< 0 || arg
> 1)
443 if (ide_spin_wait_hwgroup(drive
))
445 drive
->keep_settings
= arg
;
446 spin_unlock_irq(&ide_lock
);
451 int set_using_dma(ide_drive_t
*drive
, int arg
)
453 #ifdef CONFIG_BLK_DEV_IDEDMA
454 ide_hwif_t
*hwif
= drive
->hwif
;
457 if (arg
< 0 || arg
> 1)
460 if (!drive
->id
|| !(drive
->id
->capability
& 1))
463 if (hwif
->dma_ops
== NULL
)
467 if (ide_spin_wait_hwgroup(drive
))
470 * set ->busy flag, unlock and let it ride
472 hwif
->hwgroup
->busy
= 1;
473 spin_unlock_irq(&ide_lock
);
478 if (ide_set_dma(drive
))
484 * lock, clear ->busy flag and unlock before leaving
486 spin_lock_irq(&ide_lock
);
487 hwif
->hwgroup
->busy
= 0;
488 spin_unlock_irq(&ide_lock
);
492 if (arg
< 0 || arg
> 1)
499 int set_pio_mode(ide_drive_t
*drive
, int arg
)
502 ide_hwif_t
*hwif
= drive
->hwif
;
503 const struct ide_port_ops
*port_ops
= hwif
->port_ops
;
505 if (arg
< 0 || arg
> 255)
508 if (port_ops
== NULL
|| port_ops
->set_pio_mode
== NULL
||
509 (hwif
->host_flags
& IDE_HFLAG_NO_SET_MODE
))
512 if (drive
->special
.b
.set_tune
)
515 ide_init_drive_cmd(&rq
);
516 rq
.cmd_type
= REQ_TYPE_ATA_TASKFILE
;
518 drive
->tune_req
= (u8
) arg
;
519 drive
->special
.b
.set_tune
= 1;
520 (void) ide_do_drive_cmd(drive
, &rq
, ide_wait
);
524 static int set_unmaskirq(ide_drive_t
*drive
, int arg
)
526 if (drive
->no_unmask
)
529 if (arg
< 0 || arg
> 1)
532 if (ide_spin_wait_hwgroup(drive
))
535 spin_unlock_irq(&ide_lock
);
541 * system_bus_clock - clock guess
543 * External version of the bus clock guess used by very old IDE drivers
544 * for things like VLB timings. Should not be used.
547 int system_bus_clock (void)
549 return system_bus_speed
;
552 EXPORT_SYMBOL(system_bus_clock
);
554 static int generic_ide_suspend(struct device
*dev
, pm_message_t mesg
)
556 ide_drive_t
*drive
= dev
->driver_data
;
557 ide_hwif_t
*hwif
= HWIF(drive
);
559 struct request_pm_state rqpm
;
563 /* Call ACPI _GTM only once */
564 if (!(drive
->dn
% 2))
565 ide_acpi_get_timing(hwif
);
567 blk_rq_init(NULL
, &rq
);
568 memset(&rqpm
, 0, sizeof(rqpm
));
569 memset(&args
, 0, sizeof(args
));
570 rq
.cmd_type
= REQ_TYPE_PM_SUSPEND
;
573 rqpm
.pm_step
= ide_pm_state_start_suspend
;
574 if (mesg
.event
== PM_EVENT_PRETHAW
)
575 mesg
.event
= PM_EVENT_FREEZE
;
576 rqpm
.pm_state
= mesg
.event
;
578 ret
= ide_do_drive_cmd(drive
, &rq
, ide_wait
);
579 /* only call ACPI _PS3 after both drivers are suspended */
580 if (!ret
&& (((drive
->dn
% 2) && hwif
->drives
[0].present
581 && hwif
->drives
[1].present
)
582 || !hwif
->drives
[0].present
583 || !hwif
->drives
[1].present
))
584 ide_acpi_set_state(hwif
, 0);
588 static int generic_ide_resume(struct device
*dev
)
590 ide_drive_t
*drive
= dev
->driver_data
;
591 ide_hwif_t
*hwif
= HWIF(drive
);
593 struct request_pm_state rqpm
;
597 /* Call ACPI _STM only once */
598 if (!(drive
->dn
% 2)) {
599 ide_acpi_set_state(hwif
, 1);
600 ide_acpi_push_timing(hwif
);
603 ide_acpi_exec_tfs(drive
);
605 blk_rq_init(NULL
, &rq
);
606 memset(&rqpm
, 0, sizeof(rqpm
));
607 memset(&args
, 0, sizeof(args
));
608 rq
.cmd_type
= REQ_TYPE_PM_RESUME
;
609 rq
.cmd_flags
|= REQ_PREEMPT
;
612 rqpm
.pm_step
= ide_pm_state_start_resume
;
613 rqpm
.pm_state
= PM_EVENT_ON
;
615 err
= ide_do_drive_cmd(drive
, &rq
, ide_head_wait
);
617 if (err
== 0 && dev
->driver
) {
618 ide_driver_t
*drv
= to_ide_driver(dev
->driver
);
627 int generic_ide_ioctl(ide_drive_t
*drive
, struct file
*file
, struct block_device
*bdev
,
628 unsigned int cmd
, unsigned long arg
)
632 void __user
*p
= (void __user
*)arg
;
633 int err
= 0, (*setfunc
)(ide_drive_t
*, int);
637 case HDIO_GET_32BIT
: val
= &drive
->io_32bit
; goto read_val
;
638 case HDIO_GET_KEEPSETTINGS
: val
= &drive
->keep_settings
; goto read_val
;
639 case HDIO_GET_UNMASKINTR
: val
= &drive
->unmask
; goto read_val
;
640 case HDIO_GET_DMA
: val
= &drive
->using_dma
; goto read_val
;
641 case HDIO_SET_32BIT
: setfunc
= set_io_32bit
; goto set_val
;
642 case HDIO_SET_KEEPSETTINGS
: setfunc
= set_ksettings
; goto set_val
;
643 case HDIO_SET_PIO_MODE
: setfunc
= set_pio_mode
; goto set_val
;
644 case HDIO_SET_UNMASKINTR
: setfunc
= set_unmaskirq
; goto set_val
;
645 case HDIO_SET_DMA
: setfunc
= set_using_dma
; goto set_val
;
649 case HDIO_OBSOLETE_IDENTITY
:
650 case HDIO_GET_IDENTITY
:
651 if (bdev
!= bdev
->bd_contains
)
653 if (drive
->id_read
== 0)
655 if (copy_to_user(p
, drive
->id
, (cmd
== HDIO_GET_IDENTITY
) ? sizeof(*drive
->id
) : 142))
660 return put_user(drive
->dsc_overlap
<< IDE_NICE_DSC_OVERLAP
|
661 drive
->atapi_overlap
<< IDE_NICE_ATAPI_OVERLAP
|
662 drive
->nice1
<< IDE_NICE_1
,
663 (long __user
*) arg
);
664 #ifdef CONFIG_IDE_TASK_IOCTL
665 case HDIO_DRIVE_TASKFILE
:
666 if (!capable(CAP_SYS_ADMIN
) || !capable(CAP_SYS_RAWIO
))
668 switch(drive
->media
) {
670 return ide_taskfile_ioctl(drive
, cmd
, arg
);
674 #endif /* CONFIG_IDE_TASK_IOCTL */
677 if (!capable(CAP_SYS_RAWIO
))
679 return ide_cmd_ioctl(drive
, cmd
, arg
);
681 case HDIO_DRIVE_TASK
:
682 if (!capable(CAP_SYS_RAWIO
))
684 return ide_task_ioctl(drive
, cmd
, arg
);
686 if (!capable(CAP_SYS_ADMIN
)) return -EACCES
;
687 if (arg
!= (arg
& ((1 << IDE_NICE_DSC_OVERLAP
) | (1 << IDE_NICE_1
))))
689 drive
->dsc_overlap
= (arg
>> IDE_NICE_DSC_OVERLAP
) & 1;
690 drv
= *(ide_driver_t
**)bdev
->bd_disk
->private_data
;
691 if (drive
->dsc_overlap
&& !drv
->supports_dsc_overlap
) {
692 drive
->dsc_overlap
= 0;
695 drive
->nice1
= (arg
>> IDE_NICE_1
) & 1;
697 case HDIO_DRIVE_RESET
:
698 if (!capable(CAP_SYS_ADMIN
))
702 * Abort the current command on the
703 * group if there is one, taking
704 * care not to allow anything else
705 * to be queued and to die on the
706 * spot if we miss one somehow
709 spin_lock_irqsave(&ide_lock
, flags
);
711 if (HWGROUP(drive
)->resetting
) {
712 spin_unlock_irqrestore(&ide_lock
, flags
);
716 ide_abort(drive
, "drive reset");
718 BUG_ON(HWGROUP(drive
)->handler
);
720 /* Ensure nothing gets queued after we
721 drop the lock. Reset will clear the busy */
723 HWGROUP(drive
)->busy
= 1;
724 spin_unlock_irqrestore(&ide_lock
, flags
);
725 (void) ide_do_reset(drive
);
728 case HDIO_GET_BUSSTATE
:
729 if (!capable(CAP_SYS_ADMIN
))
731 if (put_user(HWIF(drive
)->bus_state
, (long __user
*)arg
))
735 case HDIO_SET_BUSSTATE
:
736 if (!capable(CAP_SYS_ADMIN
))
744 mutex_lock(&ide_setting_mtx
);
745 spin_lock_irqsave(&ide_lock
, flags
);
747 spin_unlock_irqrestore(&ide_lock
, flags
);
748 mutex_unlock(&ide_setting_mtx
);
749 return err
>= 0 ? put_user(err
, (long __user
*)arg
) : err
;
752 if (bdev
!= bdev
->bd_contains
)
755 if (!capable(CAP_SYS_ADMIN
))
758 mutex_lock(&ide_setting_mtx
);
759 err
= setfunc(drive
, arg
);
760 mutex_unlock(&ide_setting_mtx
);
766 EXPORT_SYMBOL(generic_ide_ioctl
);
769 * stridx() returns the offset of c within s,
770 * or -1 if c is '\0' or not found within s.
772 static int __init
stridx (const char *s
, char c
)
774 char *i
= strchr(s
, c
);
775 return (i
&& c
) ? i
- s
: -1;
779 * match_parm() does parsing for ide_setup():
781 * 1. the first char of s must be '='.
782 * 2. if the remainder matches one of the supplied keywords,
783 * the index (1 based) of the keyword is negated and returned.
784 * 3. if the remainder is a series of no more than max_vals numbers
785 * separated by commas, the numbers are saved in vals[] and a
786 * count of how many were saved is returned. Base10 is assumed,
787 * and base16 is allowed when prefixed with "0x".
788 * 4. otherwise, zero is returned.
790 static int __init
match_parm (char *s
, const char *keywords
[], int vals
[], int max_vals
)
792 static const char *decimal
= "0123456789";
793 static const char *hex
= "0123456789abcdef";
798 * Try matching against the supplied keywords,
799 * and return -(index+1) if we match one
801 if (keywords
!= NULL
) {
802 for (i
= 0; *keywords
!= NULL
; ++i
) {
803 if (!strcmp(s
, *keywords
++))
808 * Look for a series of no more than "max_vals"
809 * numeric values separated by commas, in base10,
810 * or base16 when prefixed with "0x".
811 * Return a count of how many were found.
813 for (n
= 0; (i
= stridx(decimal
, *s
)) >= 0;) {
815 while ((i
= stridx(decimal
, *++s
)) >= 0)
816 vals
[n
] = (vals
[n
] * 10) + i
;
817 if (*s
== 'x' && !vals
[n
]) {
818 while ((i
= stridx(hex
, *++s
)) >= 0)
819 vals
[n
] = (vals
[n
] * 0x10) + i
;
823 if (*s
== ',' || *s
== ';')
829 return 0; /* zero = nothing matched */
833 * ide_setup() gets called VERY EARLY during initialization,
834 * to handle kernel "command line" strings beginning with "hdx=" or "ide".
836 * Remember to update Documentation/ide/ide.txt if you change something here.
838 static int __init
ide_setup(char *s
)
842 unsigned int hw
, unit
;
844 const char max_drive
= 'a' + ((MAX_HWIFS
* MAX_DRIVES
) - 1);
846 if (strncmp(s
,"hd",2) == 0 && s
[2] == '=') /* hd= is for hd.c */
847 return 0; /* driver and not us */
849 if (strncmp(s
,"ide",3) && strncmp(s
,"idebus",6) && strncmp(s
,"hd",2))
852 printk(KERN_INFO
"ide_setup: %s", s
);
855 #ifdef CONFIG_BLK_DEV_IDEDOUBLER
856 if (!strcmp(s
, "ide=doubler")) {
857 extern int ide_doubler
;
859 printk(" : Enabled support for IDE doublers\n");
861 goto obsolete_option
;
863 #endif /* CONFIG_BLK_DEV_IDEDOUBLER */
865 if (!strcmp(s
, "ide=nodma")) {
866 printk(" : Prevented DMA\n");
868 goto obsolete_option
;
871 #ifdef CONFIG_BLK_DEV_IDEACPI
872 if (!strcmp(s
, "ide=noacpi")) {
873 //printk(" : Disable IDE ACPI support.\n");
875 goto obsolete_option
;
877 if (!strcmp(s
, "ide=acpigtf")) {
878 //printk(" : Enable IDE ACPI _GTF support.\n");
880 goto obsolete_option
;
882 if (!strcmp(s
, "ide=acpionboot")) {
883 //printk(" : Call IDE ACPI methods on boot.\n");
885 goto obsolete_option
;
887 #endif /* CONFIG_BLK_DEV_IDEACPI */
890 * Look for drive options: "hdx="
892 if (s
[0] == 'h' && s
[1] == 'd' && s
[2] >= 'a' && s
[2] <= max_drive
) {
893 const char *hd_words
[] = {
894 "none", "noprobe", "nowerr", "cdrom", "nodma",
895 "-6", "-7", "-8", "-9", "-10",
896 "noflush", "remap", "remap63", "scsi", NULL
};
898 hw
= unit
/ MAX_DRIVES
;
899 unit
= unit
% MAX_DRIVES
;
900 hwif
= &ide_hwifs
[hw
];
901 drive
= &hwif
->drives
[unit
];
902 if (strncmp(s
+ 4, "ide-", 4) == 0) {
903 strlcpy(drive
->driver_req
, s
+ 4, sizeof(drive
->driver_req
));
904 goto obsolete_option
;
906 switch (match_parm(&s
[3], hd_words
, vals
, 3)) {
907 case -1: /* "none" */
908 case -2: /* "noprobe" */
910 goto obsolete_option
;
911 case -3: /* "nowerr" */
912 drive
->bad_wstat
= BAD_R_STAT
;
913 goto obsolete_option
;
914 case -4: /* "cdrom" */
916 drive
->media
= ide_cdrom
;
917 /* an ATAPI device ignores DRDY */
918 drive
->ready_stat
= 0;
919 goto obsolete_option
;
922 goto obsolete_option
;
923 case -11: /* noflush */
925 goto obsolete_option
;
926 case -12: /* "remap" */
927 drive
->remap_0_to_1
= 1;
928 goto obsolete_option
;
929 case -13: /* "remap63" */
931 goto obsolete_option
;
932 case -14: /* "scsi" */
934 goto obsolete_option
;
935 case 3: /* cyl,head,sect */
936 drive
->media
= ide_disk
;
937 drive
->ready_stat
= READY_STAT
;
938 drive
->cyl
= drive
->bios_cyl
= vals
[0];
939 drive
->head
= drive
->bios_head
= vals
[1];
940 drive
->sect
= drive
->bios_sect
= vals
[2];
942 drive
->forced_geom
= 1;
943 goto obsolete_option
;
949 if (s
[0] != 'i' || s
[1] != 'd' || s
[2] != 'e')
952 * Look for bus speed option: "idebus="
954 if (s
[3] == 'b' && s
[4] == 'u' && s
[5] == 's') {
955 if (match_parm(&s
[6], NULL
, vals
, 1) != 1)
957 if (vals
[0] >= 20 && vals
[0] <= 66) {
958 idebus_parameter
= vals
[0];
960 printk(" -- BAD BUS SPEED! Expected value from 20 to 66");
961 goto obsolete_option
;
965 printk(" -- BAD OPTION\n");
968 printk(" -- OBSOLETE OPTION, WILL BE REMOVED SOON!\n");
972 EXPORT_SYMBOL(ide_lock
);
974 static int ide_bus_match(struct device
*dev
, struct device_driver
*drv
)
979 static char *media_string(ide_drive_t
*drive
)
981 switch (drive
->media
) {
997 static ssize_t
media_show(struct device
*dev
, struct device_attribute
*attr
, char *buf
)
999 ide_drive_t
*drive
= to_ide_device(dev
);
1000 return sprintf(buf
, "%s\n", media_string(drive
));
1003 static ssize_t
drivename_show(struct device
*dev
, struct device_attribute
*attr
, char *buf
)
1005 ide_drive_t
*drive
= to_ide_device(dev
);
1006 return sprintf(buf
, "%s\n", drive
->name
);
1009 static ssize_t
modalias_show(struct device
*dev
, struct device_attribute
*attr
, char *buf
)
1011 ide_drive_t
*drive
= to_ide_device(dev
);
1012 return sprintf(buf
, "ide:m-%s\n", media_string(drive
));
1015 static ssize_t
model_show(struct device
*dev
, struct device_attribute
*attr
,
1018 ide_drive_t
*drive
= to_ide_device(dev
);
1019 return sprintf(buf
, "%s\n", drive
->id
->model
);
1022 static ssize_t
firmware_show(struct device
*dev
, struct device_attribute
*attr
,
1025 ide_drive_t
*drive
= to_ide_device(dev
);
1026 return sprintf(buf
, "%s\n", drive
->id
->fw_rev
);
1029 static ssize_t
serial_show(struct device
*dev
, struct device_attribute
*attr
,
1032 ide_drive_t
*drive
= to_ide_device(dev
);
1033 return sprintf(buf
, "%s\n", drive
->id
->serial_no
);
1036 static struct device_attribute ide_dev_attrs
[] = {
1038 __ATTR_RO(drivename
),
1039 __ATTR_RO(modalias
),
1041 __ATTR_RO(firmware
),
1042 __ATTR(serial
, 0400, serial_show
, NULL
),
1046 static int ide_uevent(struct device
*dev
, struct kobj_uevent_env
*env
)
1048 ide_drive_t
*drive
= to_ide_device(dev
);
1050 add_uevent_var(env
, "MEDIA=%s", media_string(drive
));
1051 add_uevent_var(env
, "DRIVENAME=%s", drive
->name
);
1052 add_uevent_var(env
, "MODALIAS=ide:m-%s", media_string(drive
));
1056 static int generic_ide_probe(struct device
*dev
)
1058 ide_drive_t
*drive
= to_ide_device(dev
);
1059 ide_driver_t
*drv
= to_ide_driver(dev
->driver
);
1061 return drv
->probe
? drv
->probe(drive
) : -ENODEV
;
1064 static int generic_ide_remove(struct device
*dev
)
1066 ide_drive_t
*drive
= to_ide_device(dev
);
1067 ide_driver_t
*drv
= to_ide_driver(dev
->driver
);
1075 static void generic_ide_shutdown(struct device
*dev
)
1077 ide_drive_t
*drive
= to_ide_device(dev
);
1078 ide_driver_t
*drv
= to_ide_driver(dev
->driver
);
1080 if (dev
->driver
&& drv
->shutdown
)
1081 drv
->shutdown(drive
);
1084 struct bus_type ide_bus_type
= {
1086 .match
= ide_bus_match
,
1087 .uevent
= ide_uevent
,
1088 .probe
= generic_ide_probe
,
1089 .remove
= generic_ide_remove
,
1090 .shutdown
= generic_ide_shutdown
,
1091 .dev_attrs
= ide_dev_attrs
,
1092 .suspend
= generic_ide_suspend
,
1093 .resume
= generic_ide_resume
,
1096 EXPORT_SYMBOL_GPL(ide_bus_type
);
1099 EXPORT_SYMBOL_GPL(ide_vlb_clk
);
1101 module_param_named(vlb_clock
, ide_vlb_clk
, int, 0);
1102 MODULE_PARM_DESC(vlb_clock
, "VLB clock frequency (in MHz)");
1105 EXPORT_SYMBOL_GPL(ide_pci_clk
);
1107 module_param_named(pci_clock
, ide_pci_clk
, int, 0);
1108 MODULE_PARM_DESC(pci_clock
, "PCI bus clock frequency (in MHz)");
1110 static int ide_set_dev_param_mask(const char *s
, struct kernel_param
*kp
)
1113 unsigned int *dev_param_mask
= (unsigned int *)kp
->arg
;
1115 if (sscanf(s
, "%d.%d:%d", &a
, &b
, &j
) != 3 &&
1116 sscanf(s
, "%d.%d", &a
, &b
) != 2)
1119 i
= a
* MAX_DRIVES
+ b
;
1121 if (i
>= MAX_HWIFS
* MAX_DRIVES
|| j
< 0 || j
> 1)
1125 *dev_param_mask
|= (1 << i
);
1127 *dev_param_mask
&= (1 << i
);
1132 static unsigned int ide_nodma
;
1134 module_param_call(nodma
, ide_set_dev_param_mask
, NULL
, &ide_nodma
, 0);
1135 MODULE_PARM_DESC(nodma
, "disallow DMA for a device");
1137 static unsigned int ide_noflush
;
1139 module_param_call(noflush
, ide_set_dev_param_mask
, NULL
, &ide_noflush
, 0);
1140 MODULE_PARM_DESC(noflush
, "disable flush requests for a device");
1142 static unsigned int ide_noprobe
;
1144 module_param_call(noprobe
, ide_set_dev_param_mask
, NULL
, &ide_noprobe
, 0);
1145 MODULE_PARM_DESC(noprobe
, "skip probing for a device");
1147 static unsigned int ide_nowerr
;
1149 module_param_call(nowerr
, ide_set_dev_param_mask
, NULL
, &ide_nowerr
, 0);
1150 MODULE_PARM_DESC(nowerr
, "ignore the WRERR_STAT bit for a device");
1152 static unsigned int ide_cdroms
;
1154 module_param_call(cdrom
, ide_set_dev_param_mask
, NULL
, &ide_cdroms
, 0);
1155 MODULE_PARM_DESC(cdrom
, "force device as a CD-ROM");
1163 static unsigned int ide_disks
;
1164 static struct chs_geom ide_disks_chs
[MAX_HWIFS
* MAX_DRIVES
];
1166 static int ide_set_disk_chs(const char *str
, struct kernel_param
*kp
)
1168 int a
, b
, c
= 0, h
= 0, s
= 0, i
, j
= 1;
1170 if (sscanf(str
, "%d.%d:%d,%d,%d", &a
, &b
, &c
, &h
, &s
) != 5 &&
1171 sscanf(str
, "%d.%d:%d", &a
, &b
, &j
) != 3)
1174 i
= a
* MAX_DRIVES
+ b
;
1176 if (i
>= MAX_HWIFS
* MAX_DRIVES
|| j
< 0 || j
> 1)
1179 if (c
> INT_MAX
|| h
> 255 || s
> 255)
1183 ide_disks
|= (1 << i
);
1185 ide_disks
&= (1 << i
);
1187 ide_disks_chs
[i
].cyl
= c
;
1188 ide_disks_chs
[i
].head
= h
;
1189 ide_disks_chs
[i
].sect
= s
;
1194 module_param_call(chs
, ide_set_disk_chs
, NULL
, NULL
, 0);
1195 MODULE_PARM_DESC(chs
, "force device as a disk (using CHS)");
1197 static void ide_dev_apply_params(ide_drive_t
*drive
)
1199 int i
= drive
->hwif
->index
* MAX_DRIVES
+ drive
->select
.b
.unit
;
1201 if (ide_nodma
& (1 << i
)) {
1202 printk(KERN_INFO
"ide: disallowing DMA for %s\n", drive
->name
);
1205 if (ide_noflush
& (1 << i
)) {
1206 printk(KERN_INFO
"ide: disabling flush requests for %s\n",
1210 if (ide_noprobe
& (1 << i
)) {
1211 printk(KERN_INFO
"ide: skipping probe for %s\n", drive
->name
);
1214 if (ide_nowerr
& (1 << i
)) {
1215 printk(KERN_INFO
"ide: ignoring the WRERR_STAT bit for %s\n",
1217 drive
->bad_wstat
= BAD_R_STAT
;
1219 if (ide_cdroms
& (1 << i
)) {
1220 printk(KERN_INFO
"ide: forcing %s as a CD-ROM\n", drive
->name
);
1222 drive
->media
= ide_cdrom
;
1223 /* an ATAPI device ignores DRDY */
1224 drive
->ready_stat
= 0;
1226 if (ide_disks
& (1 << i
)) {
1227 drive
->cyl
= drive
->bios_cyl
= ide_disks_chs
[i
].cyl
;
1228 drive
->head
= drive
->bios_head
= ide_disks_chs
[i
].head
;
1229 drive
->sect
= drive
->bios_sect
= ide_disks_chs
[i
].sect
;
1230 drive
->forced_geom
= 1;
1231 printk(KERN_INFO
"ide: forcing %s as a disk (%d/%d/%d)\n",
1233 drive
->cyl
, drive
->head
, drive
->sect
);
1235 drive
->media
= ide_disk
;
1236 drive
->ready_stat
= READY_STAT
;
1240 static unsigned int ide_ignore_cable
;
1242 static int ide_set_ignore_cable(const char *s
, struct kernel_param
*kp
)
1246 if (sscanf(s
, "%d:%d", &i
, &j
) != 2 && sscanf(s
, "%d", &i
) != 1)
1249 if (i
>= MAX_HWIFS
|| j
< 0 || j
> 1)
1253 ide_ignore_cable
|= (1 << i
);
1255 ide_ignore_cable
&= (1 << i
);
1260 module_param_call(ignore_cable
, ide_set_ignore_cable
, NULL
, NULL
, 0);
1261 MODULE_PARM_DESC(ignore_cable
, "ignore cable detection");
1263 void ide_port_apply_params(ide_hwif_t
*hwif
)
1267 if (ide_ignore_cable
& (1 << hwif
->index
)) {
1268 printk(KERN_INFO
"ide: ignoring cable detection for %s\n",
1270 hwif
->cbl
= ATA_CBL_PATA40_SHORT
;
1273 for (i
= 0; i
< MAX_DRIVES
; i
++)
1274 ide_dev_apply_params(&hwif
->drives
[i
]);
1278 * This is gets invoked once during initialization, to set *everything* up
1280 static int __init
ide_init(void)
1284 printk(KERN_INFO
"Uniform Multi-Platform E-IDE driver\n");
1285 system_bus_speed
= ide_system_bus_speed();
1287 printk(KERN_INFO
"ide: Assuming %dMHz system bus speed "
1288 "for PIO modes%s\n", system_bus_speed
,
1289 idebus_parameter
? "" : "; override with idebus=xx");
1291 ret
= bus_register(&ide_bus_type
);
1293 printk(KERN_WARNING
"IDE: bus_register error: %d\n", ret
);
1297 ide_port_class
= class_create(THIS_MODULE
, "ide_port");
1298 if (IS_ERR(ide_port_class
)) {
1299 ret
= PTR_ERR(ide_port_class
);
1300 goto out_port_class
;
1310 bus_unregister(&ide_bus_type
);
1316 static char *options
= NULL
;
1317 module_param(options
, charp
, 0);
1318 MODULE_LICENSE("GPL");
1320 static void __init
parse_options (char *line
)
1324 if (line
== NULL
|| !*line
)
1326 while ((line
= next
) != NULL
) {
1327 if ((next
= strchr(line
,' ')) != NULL
)
1329 if (!ide_setup(line
))
1330 printk (KERN_INFO
"Unknown option '%s'\n", line
);
1334 int __init
init_module (void)
1336 parse_options(options
);
1340 void __exit
cleanup_module (void)
1344 class_destroy(ide_port_class
);
1346 bus_unregister(&ide_bus_type
);
1351 __setup("", ide_setup
);
1353 module_init(ide_init
);