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 #ifdef CONFIG_BLK_DEV_IDEACPI
99 int ide_noacpitfs
= 1;
100 int ide_noacpionboot
= 1;
103 ide_hwif_t ide_hwifs
[MAX_HWIFS
]; /* master data repository */
105 static void ide_port_init_devices_data(ide_hwif_t
*);
108 * Do not even *think* about calling this!
110 void ide_init_port_data(ide_hwif_t
*hwif
, unsigned int index
)
112 /* bulk initialize hwif & drive info with zeros */
113 memset(hwif
, 0, sizeof(ide_hwif_t
));
115 /* fill in any non-zero initial values */
117 hwif
->major
= ide_hwif_to_major
[index
];
122 hwif
->name
[3] = '0' + index
;
124 hwif
->bus_state
= BUSSTATE_ON
;
126 init_completion(&hwif
->gendev_rel_comp
);
128 default_hwif_iops(hwif
);
129 default_hwif_transport(hwif
);
131 ide_port_init_devices_data(hwif
);
133 EXPORT_SYMBOL_GPL(ide_init_port_data
);
135 static void ide_port_init_devices_data(ide_hwif_t
*hwif
)
139 for (unit
= 0; unit
< MAX_DRIVES
; ++unit
) {
140 ide_drive_t
*drive
= &hwif
->drives
[unit
];
141 u8 j
= (hwif
->index
* MAX_DRIVES
) + unit
;
143 memset(drive
, 0, sizeof(*drive
));
145 drive
->media
= ide_disk
;
146 drive
->select
.all
= (unit
<<4)|0xa0;
149 drive
->ready_stat
= READY_STAT
;
150 drive
->bad_wstat
= BAD_W_STAT
;
151 drive
->special
.b
.recalibrate
= 1;
152 drive
->special
.b
.set_geometry
= 1;
153 drive
->name
[0] = 'h';
154 drive
->name
[1] = 'd';
155 drive
->name
[2] = 'a' + j
;
156 drive
->max_failures
= IDE_DEFAULT_MAX_FAILURES
;
158 INIT_LIST_HEAD(&drive
->list
);
159 init_completion(&drive
->gendev_rel_comp
);
164 * init_ide_data() sets reasonable default values into all fields
165 * of all instances of the hwifs and drives, but only on the first call.
166 * Subsequent calls have no effect (they don't wipe out anything).
168 * This routine is normally called at driver initialization time,
169 * but may also be called MUCH earlier during kernel "command-line"
170 * parameter processing. As such, we cannot depend on any other parts
171 * of the kernel (such as memory allocation) to be functioning yet.
173 * This is too bad, as otherwise we could dynamically allocate the
174 * ide_drive_t structs as needed, rather than always consuming memory
175 * for the max possible number (MAX_HWIFS * MAX_DRIVES) of them.
177 * FIXME: We should stuff the setup data into __init and copy the
178 * relevant hwifs/allocate them properly during boot.
180 #define MAGIC_COOKIE 0x12345678
181 static void __init
init_ide_data (void)
184 static unsigned long magic_cookie
= MAGIC_COOKIE
;
186 if (magic_cookie
!= MAGIC_COOKIE
)
187 return; /* already initialized */
190 /* Initialise all interface structures */
191 for (index
= 0; index
< MAX_HWIFS
; ++index
) {
192 ide_hwif_t
*hwif
= &ide_hwifs
[index
];
194 ide_init_port_data(hwif
, index
);
199 * ide_system_bus_speed - guess bus speed
201 * ide_system_bus_speed() returns what we think is the system VESA/PCI
202 * bus speed (in MHz). This is used for calculating interface PIO timings.
203 * The default is 40 for known PCI systems, 50 otherwise.
204 * The "idebus=xx" parameter can be used to override this value.
205 * The actual value to be used is computed/displayed the first time
206 * through. Drivers should only use this as a last resort.
208 * Returns a guessed speed in MHz.
211 static int ide_system_bus_speed(void)
214 static struct pci_device_id pci_default
[] = {
215 { PCI_DEVICE(PCI_ANY_ID
, PCI_ANY_ID
) },
219 #define pci_default 0
220 #endif /* CONFIG_PCI */
222 /* user supplied value */
223 if (idebus_parameter
)
224 return idebus_parameter
;
226 /* safe default value for PCI or VESA and PCI*/
227 return pci_dev_present(pci_default
) ? 33 : 50;
230 void ide_remove_port_from_hwgroup(ide_hwif_t
*hwif
)
232 ide_hwgroup_t
*hwgroup
= hwif
->hwgroup
;
234 spin_lock_irq(&ide_lock
);
236 * Remove us from the hwgroup, and free
237 * the hwgroup if we were the only member
239 if (hwif
->next
== hwif
) {
240 BUG_ON(hwgroup
->hwif
!= hwif
);
243 /* There is another interface in hwgroup.
244 * Unlink us, and set hwgroup->drive and ->hwif to
247 ide_hwif_t
*g
= hwgroup
->hwif
;
249 while (g
->next
!= hwif
)
251 g
->next
= hwif
->next
;
252 if (hwgroup
->hwif
== hwif
) {
253 /* Chose a random hwif for hwgroup->hwif.
254 * It's guaranteed that there are no drives
255 * left in the hwgroup.
257 BUG_ON(hwgroup
->drive
!= NULL
);
260 BUG_ON(hwgroup
->hwif
== hwif
);
262 spin_unlock_irq(&ide_lock
);
265 /* Called with ide_lock held. */
266 static void __ide_port_unregister_devices(ide_hwif_t
*hwif
)
270 for (i
= 0; i
< MAX_DRIVES
; i
++) {
271 ide_drive_t
*drive
= &hwif
->drives
[i
];
273 if (drive
->present
) {
274 spin_unlock_irq(&ide_lock
);
275 device_unregister(&drive
->gendev
);
276 wait_for_completion(&drive
->gendev_rel_comp
);
277 spin_lock_irq(&ide_lock
);
282 void ide_port_unregister_devices(ide_hwif_t
*hwif
)
284 mutex_lock(&ide_cfg_mtx
);
285 spin_lock_irq(&ide_lock
);
286 __ide_port_unregister_devices(hwif
);
288 ide_port_init_devices_data(hwif
);
289 spin_unlock_irq(&ide_lock
);
290 mutex_unlock(&ide_cfg_mtx
);
292 EXPORT_SYMBOL_GPL(ide_port_unregister_devices
);
295 * ide_unregister - free an IDE interface
296 * @index: index of interface (will change soon to a pointer)
298 * Perform the final unregister of an IDE interface. At the moment
299 * we don't refcount interfaces so this will also get split up.
302 * The caller must not hold the IDE locks
303 * The drive present/vanishing is not yet properly locked
304 * Take care with the callbacks. These have been split to avoid
305 * deadlocking the IDE layer. The shutdown callback is called
306 * before we take the lock and free resources. It is up to the
307 * caller to be sure there is no pending I/O here, and that
308 * the interface will not be reopened (present/vanishing locking
309 * isn't yet done BTW). After we commit to the final kill we
310 * call the cleanup callback with the ide locks held.
312 * Unregister restores the hwif structures to the default state.
313 * This is raving bonkers.
316 void ide_unregister(unsigned int index
)
318 ide_hwif_t
*hwif
, *g
;
319 ide_hwgroup_t
*hwgroup
;
322 BUG_ON(index
>= MAX_HWIFS
);
324 BUG_ON(in_interrupt());
325 BUG_ON(irqs_disabled());
326 mutex_lock(&ide_cfg_mtx
);
327 spin_lock_irq(&ide_lock
);
328 hwif
= &ide_hwifs
[index
];
331 __ide_port_unregister_devices(hwif
);
334 spin_unlock_irq(&ide_lock
);
336 ide_proc_unregister_port(hwif
);
338 hwgroup
= hwif
->hwgroup
;
340 * free the irq if we were the only hwif using it
344 if (g
->irq
== hwif
->irq
)
347 } while (g
!= hwgroup
->hwif
);
349 free_irq(hwif
->irq
, hwgroup
);
351 ide_remove_port_from_hwgroup(hwif
);
353 device_unregister(hwif
->portdev
);
354 device_unregister(&hwif
->gendev
);
355 wait_for_completion(&hwif
->gendev_rel_comp
);
358 * Remove us from the kernel's knowledge
360 blk_unregister_region(MKDEV(hwif
->major
, 0), MAX_DRIVES
<<PARTN_BITS
);
361 kfree(hwif
->sg_table
);
362 unregister_blkdev(hwif
->major
, hwif
->name
);
363 spin_lock_irq(&ide_lock
);
366 ide_release_dma_engine(hwif
);
368 /* restore hwif data to pristine status */
369 ide_init_port_data(hwif
, index
);
372 spin_unlock_irq(&ide_lock
);
373 mutex_unlock(&ide_cfg_mtx
);
376 EXPORT_SYMBOL(ide_unregister
);
378 void ide_init_port_hw(ide_hwif_t
*hwif
, hw_regs_t
*hw
)
380 memcpy(hwif
->io_ports
, hw
->io_ports
, sizeof(hwif
->io_ports
));
382 hwif
->chipset
= hw
->chipset
;
383 hwif
->gendev
.parent
= hw
->dev
;
384 hwif
->ack_intr
= hw
->ack_intr
;
386 EXPORT_SYMBOL_GPL(ide_init_port_hw
);
389 * Locks for IDE setting functionality
392 DEFINE_MUTEX(ide_setting_mtx
);
394 EXPORT_SYMBOL_GPL(ide_setting_mtx
);
397 * ide_spin_wait_hwgroup - wait for group
398 * @drive: drive in the group
400 * Wait for an IDE device group to go non busy and then return
401 * holding the ide_lock which guards the hwgroup->busy status
402 * and right to use it.
405 int ide_spin_wait_hwgroup (ide_drive_t
*drive
)
407 ide_hwgroup_t
*hwgroup
= HWGROUP(drive
);
408 unsigned long timeout
= jiffies
+ (3 * HZ
);
410 spin_lock_irq(&ide_lock
);
412 while (hwgroup
->busy
) {
413 unsigned long lflags
;
414 spin_unlock_irq(&ide_lock
);
415 local_irq_set(lflags
);
416 if (time_after(jiffies
, timeout
)) {
417 local_irq_restore(lflags
);
418 printk(KERN_ERR
"%s: channel busy\n", drive
->name
);
421 local_irq_restore(lflags
);
422 spin_lock_irq(&ide_lock
);
427 EXPORT_SYMBOL(ide_spin_wait_hwgroup
);
429 int set_io_32bit(ide_drive_t
*drive
, int arg
)
431 if (drive
->no_io_32bit
)
434 if (arg
< 0 || arg
> 1 + (SUPPORT_VLB_SYNC
<< 1))
437 if (ide_spin_wait_hwgroup(drive
))
440 drive
->io_32bit
= arg
;
442 spin_unlock_irq(&ide_lock
);
447 static int set_ksettings(ide_drive_t
*drive
, int arg
)
449 if (arg
< 0 || arg
> 1)
452 if (ide_spin_wait_hwgroup(drive
))
454 drive
->keep_settings
= arg
;
455 spin_unlock_irq(&ide_lock
);
460 int set_using_dma(ide_drive_t
*drive
, int arg
)
462 #ifdef CONFIG_BLK_DEV_IDEDMA
463 ide_hwif_t
*hwif
= drive
->hwif
;
466 if (arg
< 0 || arg
> 1)
469 if (!drive
->id
|| !(drive
->id
->capability
& 1))
472 if (hwif
->dma_ops
== NULL
)
476 if (ide_spin_wait_hwgroup(drive
))
479 * set ->busy flag, unlock and let it ride
481 hwif
->hwgroup
->busy
= 1;
482 spin_unlock_irq(&ide_lock
);
487 if (ide_set_dma(drive
))
493 * lock, clear ->busy flag and unlock before leaving
495 spin_lock_irq(&ide_lock
);
496 hwif
->hwgroup
->busy
= 0;
497 spin_unlock_irq(&ide_lock
);
501 if (arg
< 0 || arg
> 1)
508 int set_pio_mode(ide_drive_t
*drive
, int arg
)
511 ide_hwif_t
*hwif
= drive
->hwif
;
512 const struct ide_port_ops
*port_ops
= hwif
->port_ops
;
514 if (arg
< 0 || arg
> 255)
517 if (port_ops
== NULL
|| port_ops
->set_pio_mode
== NULL
||
518 (hwif
->host_flags
& IDE_HFLAG_NO_SET_MODE
))
521 if (drive
->special
.b
.set_tune
)
524 ide_init_drive_cmd(&rq
);
525 rq
.cmd_type
= REQ_TYPE_ATA_TASKFILE
;
527 drive
->tune_req
= (u8
) arg
;
528 drive
->special
.b
.set_tune
= 1;
529 (void) ide_do_drive_cmd(drive
, &rq
, ide_wait
);
533 static int set_unmaskirq(ide_drive_t
*drive
, int arg
)
535 if (drive
->no_unmask
)
538 if (arg
< 0 || arg
> 1)
541 if (ide_spin_wait_hwgroup(drive
))
544 spin_unlock_irq(&ide_lock
);
550 * system_bus_clock - clock guess
552 * External version of the bus clock guess used by very old IDE drivers
553 * for things like VLB timings. Should not be used.
556 int system_bus_clock (void)
558 return system_bus_speed
;
561 EXPORT_SYMBOL(system_bus_clock
);
563 static int generic_ide_suspend(struct device
*dev
, pm_message_t mesg
)
565 ide_drive_t
*drive
= dev
->driver_data
;
566 ide_hwif_t
*hwif
= HWIF(drive
);
568 struct request_pm_state rqpm
;
572 /* Call ACPI _GTM only once */
573 if (!(drive
->dn
% 2))
574 ide_acpi_get_timing(hwif
);
576 memset(&rq
, 0, sizeof(rq
));
577 memset(&rqpm
, 0, sizeof(rqpm
));
578 memset(&args
, 0, sizeof(args
));
579 rq
.cmd_type
= REQ_TYPE_PM_SUSPEND
;
582 rqpm
.pm_step
= ide_pm_state_start_suspend
;
583 if (mesg
.event
== PM_EVENT_PRETHAW
)
584 mesg
.event
= PM_EVENT_FREEZE
;
585 rqpm
.pm_state
= mesg
.event
;
587 ret
= ide_do_drive_cmd(drive
, &rq
, ide_wait
);
588 /* only call ACPI _PS3 after both drivers are suspended */
589 if (!ret
&& (((drive
->dn
% 2) && hwif
->drives
[0].present
590 && hwif
->drives
[1].present
)
591 || !hwif
->drives
[0].present
592 || !hwif
->drives
[1].present
))
593 ide_acpi_set_state(hwif
, 0);
597 static int generic_ide_resume(struct device
*dev
)
599 ide_drive_t
*drive
= dev
->driver_data
;
600 ide_hwif_t
*hwif
= HWIF(drive
);
602 struct request_pm_state rqpm
;
606 /* Call ACPI _STM only once */
607 if (!(drive
->dn
% 2)) {
608 ide_acpi_set_state(hwif
, 1);
609 ide_acpi_push_timing(hwif
);
612 ide_acpi_exec_tfs(drive
);
614 memset(&rq
, 0, sizeof(rq
));
615 memset(&rqpm
, 0, sizeof(rqpm
));
616 memset(&args
, 0, sizeof(args
));
617 rq
.cmd_type
= REQ_TYPE_PM_RESUME
;
620 rqpm
.pm_step
= ide_pm_state_start_resume
;
621 rqpm
.pm_state
= PM_EVENT_ON
;
623 err
= ide_do_drive_cmd(drive
, &rq
, ide_head_wait
);
625 if (err
== 0 && dev
->driver
) {
626 ide_driver_t
*drv
= to_ide_driver(dev
->driver
);
635 int generic_ide_ioctl(ide_drive_t
*drive
, struct file
*file
, struct block_device
*bdev
,
636 unsigned int cmd
, unsigned long arg
)
640 void __user
*p
= (void __user
*)arg
;
641 int err
= 0, (*setfunc
)(ide_drive_t
*, int);
645 case HDIO_GET_32BIT
: val
= &drive
->io_32bit
; goto read_val
;
646 case HDIO_GET_KEEPSETTINGS
: val
= &drive
->keep_settings
; goto read_val
;
647 case HDIO_GET_UNMASKINTR
: val
= &drive
->unmask
; goto read_val
;
648 case HDIO_GET_DMA
: val
= &drive
->using_dma
; goto read_val
;
649 case HDIO_SET_32BIT
: setfunc
= set_io_32bit
; goto set_val
;
650 case HDIO_SET_KEEPSETTINGS
: setfunc
= set_ksettings
; goto set_val
;
651 case HDIO_SET_PIO_MODE
: setfunc
= set_pio_mode
; goto set_val
;
652 case HDIO_SET_UNMASKINTR
: setfunc
= set_unmaskirq
; goto set_val
;
653 case HDIO_SET_DMA
: setfunc
= set_using_dma
; goto set_val
;
657 case HDIO_OBSOLETE_IDENTITY
:
658 case HDIO_GET_IDENTITY
:
659 if (bdev
!= bdev
->bd_contains
)
661 if (drive
->id_read
== 0)
663 if (copy_to_user(p
, drive
->id
, (cmd
== HDIO_GET_IDENTITY
) ? sizeof(*drive
->id
) : 142))
668 return put_user(drive
->dsc_overlap
<< IDE_NICE_DSC_OVERLAP
|
669 drive
->atapi_overlap
<< IDE_NICE_ATAPI_OVERLAP
|
670 drive
->nice1
<< IDE_NICE_1
,
671 (long __user
*) arg
);
672 #ifdef CONFIG_IDE_TASK_IOCTL
673 case HDIO_DRIVE_TASKFILE
:
674 if (!capable(CAP_SYS_ADMIN
) || !capable(CAP_SYS_RAWIO
))
676 switch(drive
->media
) {
678 return ide_taskfile_ioctl(drive
, cmd
, arg
);
682 #endif /* CONFIG_IDE_TASK_IOCTL */
685 if (!capable(CAP_SYS_RAWIO
))
687 return ide_cmd_ioctl(drive
, cmd
, arg
);
689 case HDIO_DRIVE_TASK
:
690 if (!capable(CAP_SYS_RAWIO
))
692 return ide_task_ioctl(drive
, cmd
, arg
);
694 if (!capable(CAP_SYS_ADMIN
)) return -EACCES
;
695 if (arg
!= (arg
& ((1 << IDE_NICE_DSC_OVERLAP
) | (1 << IDE_NICE_1
))))
697 drive
->dsc_overlap
= (arg
>> IDE_NICE_DSC_OVERLAP
) & 1;
698 drv
= *(ide_driver_t
**)bdev
->bd_disk
->private_data
;
699 if (drive
->dsc_overlap
&& !drv
->supports_dsc_overlap
) {
700 drive
->dsc_overlap
= 0;
703 drive
->nice1
= (arg
>> IDE_NICE_1
) & 1;
705 case HDIO_DRIVE_RESET
:
706 if (!capable(CAP_SYS_ADMIN
))
710 * Abort the current command on the
711 * group if there is one, taking
712 * care not to allow anything else
713 * to be queued and to die on the
714 * spot if we miss one somehow
717 spin_lock_irqsave(&ide_lock
, flags
);
719 if (HWGROUP(drive
)->resetting
) {
720 spin_unlock_irqrestore(&ide_lock
, flags
);
724 ide_abort(drive
, "drive reset");
726 BUG_ON(HWGROUP(drive
)->handler
);
728 /* Ensure nothing gets queued after we
729 drop the lock. Reset will clear the busy */
731 HWGROUP(drive
)->busy
= 1;
732 spin_unlock_irqrestore(&ide_lock
, flags
);
733 (void) ide_do_reset(drive
);
736 case HDIO_GET_BUSSTATE
:
737 if (!capable(CAP_SYS_ADMIN
))
739 if (put_user(HWIF(drive
)->bus_state
, (long __user
*)arg
))
743 case HDIO_SET_BUSSTATE
:
744 if (!capable(CAP_SYS_ADMIN
))
752 mutex_lock(&ide_setting_mtx
);
753 spin_lock_irqsave(&ide_lock
, flags
);
755 spin_unlock_irqrestore(&ide_lock
, flags
);
756 mutex_unlock(&ide_setting_mtx
);
757 return err
>= 0 ? put_user(err
, (long __user
*)arg
) : err
;
760 if (bdev
!= bdev
->bd_contains
)
763 if (!capable(CAP_SYS_ADMIN
))
766 mutex_lock(&ide_setting_mtx
);
767 err
= setfunc(drive
, arg
);
768 mutex_unlock(&ide_setting_mtx
);
774 EXPORT_SYMBOL(generic_ide_ioctl
);
777 * stridx() returns the offset of c within s,
778 * or -1 if c is '\0' or not found within s.
780 static int __init
stridx (const char *s
, char c
)
782 char *i
= strchr(s
, c
);
783 return (i
&& c
) ? i
- s
: -1;
787 * match_parm() does parsing for ide_setup():
789 * 1. the first char of s must be '='.
790 * 2. if the remainder matches one of the supplied keywords,
791 * the index (1 based) of the keyword is negated and returned.
792 * 3. if the remainder is a series of no more than max_vals numbers
793 * separated by commas, the numbers are saved in vals[] and a
794 * count of how many were saved is returned. Base10 is assumed,
795 * and base16 is allowed when prefixed with "0x".
796 * 4. otherwise, zero is returned.
798 static int __init
match_parm (char *s
, const char *keywords
[], int vals
[], int max_vals
)
800 static const char *decimal
= "0123456789";
801 static const char *hex
= "0123456789abcdef";
806 * Try matching against the supplied keywords,
807 * and return -(index+1) if we match one
809 if (keywords
!= NULL
) {
810 for (i
= 0; *keywords
!= NULL
; ++i
) {
811 if (!strcmp(s
, *keywords
++))
816 * Look for a series of no more than "max_vals"
817 * numeric values separated by commas, in base10,
818 * or base16 when prefixed with "0x".
819 * Return a count of how many were found.
821 for (n
= 0; (i
= stridx(decimal
, *s
)) >= 0;) {
823 while ((i
= stridx(decimal
, *++s
)) >= 0)
824 vals
[n
] = (vals
[n
] * 10) + i
;
825 if (*s
== 'x' && !vals
[n
]) {
826 while ((i
= stridx(hex
, *++s
)) >= 0)
827 vals
[n
] = (vals
[n
] * 0x10) + i
;
831 if (*s
== ',' || *s
== ';')
837 return 0; /* zero = nothing matched */
841 * ide_setup() gets called VERY EARLY during initialization,
842 * to handle kernel "command line" strings beginning with "hdx=" or "ide".
844 * Remember to update Documentation/ide/ide.txt if you change something here.
846 static int __init
ide_setup(char *s
)
850 unsigned int hw
, unit
;
852 const char max_drive
= 'a' + ((MAX_HWIFS
* MAX_DRIVES
) - 1);
854 if (strncmp(s
,"hd",2) == 0 && s
[2] == '=') /* hd= is for hd.c */
855 return 0; /* driver and not us */
857 if (strncmp(s
,"ide",3) && strncmp(s
,"idebus",6) && strncmp(s
,"hd",2))
860 printk(KERN_INFO
"ide_setup: %s", s
);
863 #ifdef CONFIG_BLK_DEV_IDEDOUBLER
864 if (!strcmp(s
, "ide=doubler")) {
865 extern int ide_doubler
;
867 printk(" : Enabled support for IDE doublers\n");
871 #endif /* CONFIG_BLK_DEV_IDEDOUBLER */
873 if (!strcmp(s
, "ide=nodma")) {
874 printk(" : Prevented DMA\n");
876 goto obsolete_option
;
879 #ifdef CONFIG_BLK_DEV_IDEACPI
880 if (!strcmp(s
, "ide=noacpi")) {
881 //printk(" : Disable IDE ACPI support.\n");
885 if (!strcmp(s
, "ide=acpigtf")) {
886 //printk(" : Enable IDE ACPI _GTF support.\n");
890 if (!strcmp(s
, "ide=acpionboot")) {
891 //printk(" : Call IDE ACPI methods on boot.\n");
892 ide_noacpionboot
= 0;
895 #endif /* CONFIG_BLK_DEV_IDEACPI */
898 * Look for drive options: "hdx="
900 if (s
[0] == 'h' && s
[1] == 'd' && s
[2] >= 'a' && s
[2] <= max_drive
) {
901 const char *hd_words
[] = {
902 "none", "noprobe", "nowerr", "cdrom", "nodma",
903 "autotune", "-7", "-8", "-9", "-10",
904 "noflush", "remap", "remap63", "scsi", NULL
};
906 hw
= unit
/ MAX_DRIVES
;
907 unit
= unit
% MAX_DRIVES
;
908 hwif
= &ide_hwifs
[hw
];
909 drive
= &hwif
->drives
[unit
];
910 if (strncmp(s
+ 4, "ide-", 4) == 0) {
911 strlcpy(drive
->driver_req
, s
+ 4, sizeof(drive
->driver_req
));
912 goto obsolete_option
;
914 switch (match_parm(&s
[3], hd_words
, vals
, 3)) {
915 case -1: /* "none" */
916 case -2: /* "noprobe" */
919 case -3: /* "nowerr" */
920 drive
->bad_wstat
= BAD_R_STAT
;
922 case -4: /* "cdrom" */
924 drive
->media
= ide_cdrom
;
925 /* an ATAPI device ignores DRDY */
926 drive
->ready_stat
= 0;
931 case -6: /* "autotune" */
933 goto obsolete_option
;
934 case -11: /* noflush */
937 case -12: /* "remap" */
938 drive
->remap_0_to_1
= 1;
939 goto obsolete_option
;
940 case -13: /* "remap63" */
942 goto obsolete_option
;
943 case -14: /* "scsi" */
945 goto obsolete_option
;
946 case 3: /* cyl,head,sect */
947 drive
->media
= ide_disk
;
948 drive
->ready_stat
= READY_STAT
;
949 drive
->cyl
= drive
->bios_cyl
= vals
[0];
950 drive
->head
= drive
->bios_head
= vals
[1];
951 drive
->sect
= drive
->bios_sect
= vals
[2];
953 drive
->forced_geom
= 1;
960 if (s
[0] != 'i' || s
[1] != 'd' || s
[2] != 'e')
963 * Look for bus speed option: "idebus="
965 if (s
[3] == 'b' && s
[4] == 'u' && s
[5] == 's') {
966 if (match_parm(&s
[6], NULL
, vals
, 1) != 1)
968 if (vals
[0] >= 20 && vals
[0] <= 66) {
969 idebus_parameter
= vals
[0];
971 printk(" -- BAD BUS SPEED! Expected value from 20 to 66");
976 printk(" -- BAD OPTION\n");
979 printk(" -- OBSOLETE OPTION, WILL BE REMOVED SOON!\n");
986 EXPORT_SYMBOL(ide_lock
);
988 static int ide_bus_match(struct device
*dev
, struct device_driver
*drv
)
993 static char *media_string(ide_drive_t
*drive
)
995 switch (drive
->media
) {
1011 static ssize_t
media_show(struct device
*dev
, struct device_attribute
*attr
, char *buf
)
1013 ide_drive_t
*drive
= to_ide_device(dev
);
1014 return sprintf(buf
, "%s\n", media_string(drive
));
1017 static ssize_t
drivename_show(struct device
*dev
, struct device_attribute
*attr
, char *buf
)
1019 ide_drive_t
*drive
= to_ide_device(dev
);
1020 return sprintf(buf
, "%s\n", drive
->name
);
1023 static ssize_t
modalias_show(struct device
*dev
, struct device_attribute
*attr
, char *buf
)
1025 ide_drive_t
*drive
= to_ide_device(dev
);
1026 return sprintf(buf
, "ide:m-%s\n", media_string(drive
));
1029 static ssize_t
model_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
->model
);
1036 static ssize_t
firmware_show(struct device
*dev
, struct device_attribute
*attr
,
1039 ide_drive_t
*drive
= to_ide_device(dev
);
1040 return sprintf(buf
, "%s\n", drive
->id
->fw_rev
);
1043 static ssize_t
serial_show(struct device
*dev
, struct device_attribute
*attr
,
1046 ide_drive_t
*drive
= to_ide_device(dev
);
1047 return sprintf(buf
, "%s\n", drive
->id
->serial_no
);
1050 static struct device_attribute ide_dev_attrs
[] = {
1052 __ATTR_RO(drivename
),
1053 __ATTR_RO(modalias
),
1055 __ATTR_RO(firmware
),
1056 __ATTR(serial
, 0400, serial_show
, NULL
),
1060 static int ide_uevent(struct device
*dev
, struct kobj_uevent_env
*env
)
1062 ide_drive_t
*drive
= to_ide_device(dev
);
1064 add_uevent_var(env
, "MEDIA=%s", media_string(drive
));
1065 add_uevent_var(env
, "DRIVENAME=%s", drive
->name
);
1066 add_uevent_var(env
, "MODALIAS=ide:m-%s", media_string(drive
));
1070 static int generic_ide_probe(struct device
*dev
)
1072 ide_drive_t
*drive
= to_ide_device(dev
);
1073 ide_driver_t
*drv
= to_ide_driver(dev
->driver
);
1075 return drv
->probe
? drv
->probe(drive
) : -ENODEV
;
1078 static int generic_ide_remove(struct device
*dev
)
1080 ide_drive_t
*drive
= to_ide_device(dev
);
1081 ide_driver_t
*drv
= to_ide_driver(dev
->driver
);
1089 static void generic_ide_shutdown(struct device
*dev
)
1091 ide_drive_t
*drive
= to_ide_device(dev
);
1092 ide_driver_t
*drv
= to_ide_driver(dev
->driver
);
1094 if (dev
->driver
&& drv
->shutdown
)
1095 drv
->shutdown(drive
);
1098 struct bus_type ide_bus_type
= {
1100 .match
= ide_bus_match
,
1101 .uevent
= ide_uevent
,
1102 .probe
= generic_ide_probe
,
1103 .remove
= generic_ide_remove
,
1104 .shutdown
= generic_ide_shutdown
,
1105 .dev_attrs
= ide_dev_attrs
,
1106 .suspend
= generic_ide_suspend
,
1107 .resume
= generic_ide_resume
,
1110 EXPORT_SYMBOL_GPL(ide_bus_type
);
1112 static void ide_port_class_release(struct device
*portdev
)
1114 ide_hwif_t
*hwif
= dev_get_drvdata(portdev
);
1116 put_device(&hwif
->gendev
);
1119 static unsigned int ide_ignore_cable
;
1121 static int ide_set_ignore_cable(const char *s
, struct kernel_param
*kp
)
1125 if (sscanf(s
, "%d:%d", &i
, &j
) != 2 && sscanf(s
, "%d", &i
) != 1)
1128 if (i
>= MAX_HWIFS
|| j
< 0 || j
> 1)
1132 ide_ignore_cable
|= (1 << i
);
1134 ide_ignore_cable
&= (1 << i
);
1139 module_param_call(ignore_cable
, ide_set_ignore_cable
, NULL
, NULL
, 0);
1140 MODULE_PARM_DESC(ignore_cable
, "ignore cable detection");
1142 void ide_port_apply_params(ide_hwif_t
*hwif
)
1144 if (ide_ignore_cable
& (1 << hwif
->index
)) {
1145 printk(KERN_INFO
"ide: ignoring cable detection for %s\n",
1147 hwif
->cbl
= ATA_CBL_PATA40_SHORT
;
1152 * This is gets invoked once during initialization, to set *everything* up
1154 static int __init
ide_init(void)
1158 printk(KERN_INFO
"Uniform Multi-Platform E-IDE driver\n");
1159 system_bus_speed
= ide_system_bus_speed();
1161 printk(KERN_INFO
"ide: Assuming %dMHz system bus speed "
1162 "for PIO modes%s\n", system_bus_speed
,
1163 idebus_parameter
? "" : "; override with idebus=xx");
1165 ret
= bus_register(&ide_bus_type
);
1167 printk(KERN_WARNING
"IDE: bus_register error: %d\n", ret
);
1171 ide_port_class
= class_create(THIS_MODULE
, "ide_port");
1172 if (IS_ERR(ide_port_class
)) {
1173 ret
= PTR_ERR(ide_port_class
);
1174 goto out_port_class
;
1176 ide_port_class
->dev_release
= ide_port_class_release
;
1185 bus_unregister(&ide_bus_type
);
1191 static char *options
= NULL
;
1192 module_param(options
, charp
, 0);
1193 MODULE_LICENSE("GPL");
1195 static void __init
parse_options (char *line
)
1199 if (line
== NULL
|| !*line
)
1201 while ((line
= next
) != NULL
) {
1202 if ((next
= strchr(line
,' ')) != NULL
)
1204 if (!ide_setup(line
))
1205 printk (KERN_INFO
"Unknown option '%s'\n", line
);
1209 int __init
init_module (void)
1211 parse_options(options
);
1215 void __exit
cleanup_module (void)
1219 for (index
= 0; index
< MAX_HWIFS
; ++index
)
1220 ide_unregister(index
);
1224 class_destroy(ide_port_class
);
1226 bus_unregister(&ide_bus_type
);
1231 __setup("", ide_setup
);
1233 module_init(ide_init
);