2 * linux/drivers/ide/ide.c Version 7.00beta2 Mar 05 2003
4 * Copyright (C) 1994-1998 Linus Torvalds & authors (see below)
8 * Mostly written by Mark Lord <mlord@pobox.com>
9 * and Gadi Oxman <gadio@netvision.net.il>
10 * and Andre Hedrick <andre@linux-ide.org>
12 * See linux/MAINTAINERS for address of current maintainer.
14 * This is the multiple IDE interface driver, as evolved from hd.c.
15 * It supports up to MAX_HWIFS IDE interfaces, on one or more IRQs
17 * There can be up to two drives per interface, as per the ATA-2 spec.
19 * Primary: ide0, port 0x1f0; major=3; hda is minor=0; hdb is minor=64
20 * Secondary: ide1, port 0x170; major=22; hdc is minor=0; hdd is minor=64
21 * Tertiary: ide2, port 0x???; major=33; hde is minor=0; hdf is minor=64
22 * Quaternary: ide3, port 0x???; major=34; hdg is minor=0; hdh is minor=64
27 * | It traverses the request-list, using interrupts to jump between functions.
28 * | As nearly all functions can be called within interrupts, we may not sleep.
29 * | Special care is recommended. Have Fun!
31 * | modified by Drew Eckhardt to check nr of hd's from the CMOS.
33 * | Thanks to Branko Lankester, lankeste@fwi.uva.nl, who found a bug
34 * | in the early extended-partition checks and added DM partitions.
36 * | Early work on error handling by Mika Liljeberg (liljeber@cs.Helsinki.FI).
38 * | IRQ-unmask, drive-id, multiple-mode, support for ">16 heads",
39 * | and general streamlining by Mark Lord (mlord@pobox.com).
41 * October, 1994 -- Complete line-by-line overhaul for linux 1.1.x, by:
43 * Mark Lord (mlord@pobox.com) (IDE Perf.Pkg)
44 * Delman Lee (delman@ieee.org) ("Mr. atdisk2")
45 * Scott Snyder (snyder@fnald0.fnal.gov) (ATAPI IDE cd-rom)
47 * This was a rewrite of just about everything from hd.c, though some original
48 * code is still sprinkled about. Think of it as a major evolution, with
49 * inspiration from lots of linux users, esp. hamish@zot.apana.org.au
51 * Version 1.0 ALPHA initial code, primary i/f working okay
52 * Version 1.3 BETA dual i/f on shared irq tested & working!
53 * Version 1.4 BETA added auto probing for irq(s)
54 * Version 1.5 BETA added ALPHA (untested) support for IDE cd-roms,
56 * Version 5.50 allow values as small as 20 for idebus=
57 * Version 5.51 force non io_32bit in drive_cmd_intr()
58 * change delay_10ms() to delay_50ms() to fix problems
59 * Version 5.52 fix incorrect invalidation of removable devices
60 * add "hdx=slow" command line option
61 * Version 5.60 start to modularize the driver; the disk and ATAPI
62 * drivers can be compiled as loadable modules.
63 * move IDE probe code to ide-probe.c
64 * move IDE disk code to ide-disk.c
65 * add support for generic IDE device subdrivers
66 * add m68k code from Geert Uytterhoeven
67 * probe all interfaces by default
68 * add ioctl to (re)probe an interface
69 * Version 6.00 use per device request queues
70 * attempt to optimize shared hwgroup performance
71 * add ioctl to manually adjust bandwidth algorithms
72 * add kerneld support for the probe module
73 * fix bug in ide_error()
74 * fix bug in the first ide_get_lock() call for Atari
75 * don't flush leftover data for ATAPI devices
76 * Version 6.01 clear hwgroup->active while the hwgroup sleeps
77 * support HDIO_GETGEO for floppies
78 * Version 6.02 fix ide_ack_intr() call
79 * check partition table on floppies
80 * Version 6.03 handle bad status bit sequencing in ide_wait_stat()
81 * Version 6.10 deleted old entries from this list of updates
82 * replaced triton.c with ide-dma.c generic PCI DMA
83 * added support for BIOS-enabled UltraDMA
84 * rename all "promise" things to "pdc4030"
85 * fix EZ-DRIVE handling on small disks
86 * Version 6.11 fix probe error in ide_scan_devices()
87 * fix ancient "jiffies" polling bugs
88 * mask all hwgroup interrupts on each irq entry
89 * Version 6.12 integrate ioctl and proc interfaces
90 * fix parsing of "idex=" command line parameter
91 * Version 6.13 add support for ide4/ide5 courtesy rjones@orchestream.com
92 * Version 6.14 fixed IRQ sharing among PCI devices
93 * Version 6.15 added SMP awareness to IDE drivers
94 * Version 6.16 fixed various bugs; even more SMP friendly
95 * Version 6.17 fix for newest EZ-Drive problem
96 * Version 6.18 default unpartitioned-disk translation now "BIOS LBA"
97 * Version 6.19 Re-design for a UNIFORM driver for all platforms,
98 * model based on suggestions from Russell King and
100 * Promise DC4030VL now supported.
101 * add support for ide6/ide7
102 * delay_50ms() changed to ide_delay_50ms() and exported.
103 * Version 6.20 Added/Fixed Generic ATA-66 support and hwif detection.
104 * Added hdx=flash to allow for second flash disk
105 * detection w/o the hang loop.
106 * Added support for ide8/ide9
107 * Added idex=ata66 for the quirky chipsets that are
108 * ATA-66 compliant, but have yet to determine a method
109 * of verification of the 80c cable presence.
110 * Specifically Promise's PDC20262 chipset.
111 * Version 6.21 Fixing/Fixed SMP spinlock issue with insight from an old
112 * hat that clarified original low level driver design.
113 * Version 6.30 Added SMP support; fixed multmode issues. -ml
114 * Version 6.31 Debug Share INTR's and request queue streaming
115 * Native ATA-100 support
116 * Prep for Cascades Project
117 * Version 7.00alpha First named revision of ide rearrange
119 * Some additional driver compile-time options are in ./include/linux/ide.h
121 * To do, in likely order of completion:
122 * - modify kernel to obtain BIOS geometry for drives on 2nd/3rd/4th i/f
126 #define REVISION "Revision: 7.00alpha2"
127 #define VERSION "Id: ide.c 7.00a2 20020906"
129 #undef REALLY_SLOW_IO /* most systems can safely undef this */
131 #define _IDE_C /* Tell ide.h it's really us */
133 #include <linux/module.h>
134 #include <linux/types.h>
135 #include <linux/string.h>
136 #include <linux/kernel.h>
137 #include <linux/timer.h>
138 #include <linux/mm.h>
139 #include <linux/interrupt.h>
140 #include <linux/major.h>
141 #include <linux/errno.h>
142 #include <linux/genhd.h>
143 #include <linux/blkpg.h>
144 #include <linux/slab.h>
145 #include <linux/init.h>
146 #include <linux/pci.h>
147 #include <linux/delay.h>
148 #include <linux/ide.h>
149 #include <linux/completion.h>
150 #include <linux/reboot.h>
151 #include <linux/cdrom.h>
152 #include <linux/seq_file.h>
153 #include <linux/device.h>
154 #include <linux/bitops.h>
156 #include <asm/byteorder.h>
158 #include <asm/uaccess.h>
162 /* default maximum number of failures */
163 #define IDE_DEFAULT_MAX_FAILURES 1
165 static const u8 ide_hwif_to_major
[] = { IDE0_MAJOR
, IDE1_MAJOR
,
166 IDE2_MAJOR
, IDE3_MAJOR
,
167 IDE4_MAJOR
, IDE5_MAJOR
,
168 IDE6_MAJOR
, IDE7_MAJOR
,
169 IDE8_MAJOR
, IDE9_MAJOR
};
171 static int idebus_parameter
; /* holds the "idebus=" parameter */
172 static int system_bus_speed
; /* holds what we think is VESA/PCI bus speed */
173 static int initializing
; /* set while initializing built-in drivers */
175 DECLARE_MUTEX(ide_cfg_sem
);
176 __cacheline_aligned_in_smp
DEFINE_SPINLOCK(ide_lock
);
178 #ifdef CONFIG_BLK_DEV_IDEPCI
179 static int ide_scan_direction
; /* THIS was formerly 2.2.x pci=reverse */
182 #ifdef CONFIG_IDEDMA_AUTO
188 EXPORT_SYMBOL(noautodma
);
191 * This is declared extern in ide.h, for access by other IDE modules:
193 ide_hwif_t ide_hwifs
[MAX_HWIFS
]; /* master data repository */
195 EXPORT_SYMBOL(ide_hwifs
);
198 * Do not even *think* about calling this!
200 static void init_hwif_data(ide_hwif_t
*hwif
, unsigned int index
)
204 /* bulk initialize hwif & drive info with zeros */
205 memset(hwif
, 0, sizeof(ide_hwif_t
));
207 /* fill in any non-zero initial values */
209 hwif
->major
= ide_hwif_to_major
[index
];
214 hwif
->name
[3] = '0' + index
;
216 hwif
->bus_state
= BUSSTATE_ON
;
218 hwif
->atapi_dma
= 0; /* disable all atapi dma */
219 hwif
->ultra_mask
= 0x80; /* disable all ultra */
220 hwif
->mwdma_mask
= 0x80; /* disable all mwdma */
221 hwif
->swdma_mask
= 0x80; /* disable all swdma */
223 init_completion(&hwif
->gendev_rel_comp
);
225 default_hwif_iops(hwif
);
226 default_hwif_transport(hwif
);
227 for (unit
= 0; unit
< MAX_DRIVES
; ++unit
) {
228 ide_drive_t
*drive
= &hwif
->drives
[unit
];
230 drive
->media
= ide_disk
;
231 drive
->select
.all
= (unit
<<4)|0xa0;
234 drive
->ready_stat
= READY_STAT
;
235 drive
->bad_wstat
= BAD_W_STAT
;
236 drive
->special
.b
.recalibrate
= 1;
237 drive
->special
.b
.set_geometry
= 1;
238 drive
->name
[0] = 'h';
239 drive
->name
[1] = 'd';
240 drive
->name
[2] = 'a' + (index
* MAX_DRIVES
) + unit
;
241 drive
->max_failures
= IDE_DEFAULT_MAX_FAILURES
;
242 drive
->using_dma
= 0;
244 INIT_LIST_HEAD(&drive
->list
);
245 init_completion(&drive
->gendev_rel_comp
);
249 static void init_hwif_default(ide_hwif_t
*hwif
, unsigned int index
)
253 memset(&hw
, 0, sizeof(hw_regs_t
));
255 ide_init_hwif_ports(&hw
, ide_default_io_base(index
), 0, &hwif
->irq
);
257 memcpy(&hwif
->hw
, &hw
, sizeof(hw
));
258 memcpy(hwif
->io_ports
, hw
.io_ports
, sizeof(hw
.io_ports
));
260 hwif
->noprobe
= !hwif
->io_ports
[IDE_DATA_OFFSET
];
261 #ifdef CONFIG_BLK_DEV_HD
262 if (hwif
->io_ports
[IDE_DATA_OFFSET
] == HD_DATA
)
263 hwif
->noprobe
= 1; /* may be overridden by ide_setup() */
267 extern void ide_arm_init(void);
270 * init_ide_data() sets reasonable default values into all fields
271 * of all instances of the hwifs and drives, but only on the first call.
272 * Subsequent calls have no effect (they don't wipe out anything).
274 * This routine is normally called at driver initialization time,
275 * but may also be called MUCH earlier during kernel "command-line"
276 * parameter processing. As such, we cannot depend on any other parts
277 * of the kernel (such as memory allocation) to be functioning yet.
279 * This is too bad, as otherwise we could dynamically allocate the
280 * ide_drive_t structs as needed, rather than always consuming memory
281 * for the max possible number (MAX_HWIFS * MAX_DRIVES) of them.
283 * FIXME: We should stuff the setup data into __init and copy the
284 * relevant hwifs/allocate them properly during boot.
286 #define MAGIC_COOKIE 0x12345678
287 static void __init
init_ide_data (void)
291 static unsigned long magic_cookie
= MAGIC_COOKIE
;
293 if (magic_cookie
!= MAGIC_COOKIE
)
294 return; /* already initialized */
297 /* Initialise all interface structures */
298 for (index
= 0; index
< MAX_HWIFS
; ++index
) {
299 hwif
= &ide_hwifs
[index
];
300 init_hwif_data(hwif
, index
);
301 init_hwif_default(hwif
, index
);
302 #if !defined(CONFIG_PPC32) || !defined(CONFIG_PCI)
303 hwif
->irq
= hwif
->hw
.irq
=
304 ide_init_default_irq(hwif
->io_ports
[IDE_DATA_OFFSET
]);
307 #ifdef CONFIG_IDE_ARM
315 * ide_system_bus_speed - guess bus speed
317 * ide_system_bus_speed() returns what we think is the system VESA/PCI
318 * bus speed (in MHz). This is used for calculating interface PIO timings.
319 * The default is 40 for known PCI systems, 50 otherwise.
320 * The "idebus=xx" parameter can be used to override this value.
321 * The actual value to be used is computed/displayed the first time
322 * through. Drivers should only use this as a last resort.
324 * Returns a guessed speed in MHz.
327 static int ide_system_bus_speed(void)
330 static struct pci_device_id pci_default
[] = {
331 { PCI_DEVICE(PCI_ANY_ID
, PCI_ANY_ID
) },
335 #define pci_default 0
336 #endif /* CONFIG_PCI */
338 if (!system_bus_speed
) {
339 if (idebus_parameter
) {
340 /* user supplied value */
341 system_bus_speed
= idebus_parameter
;
342 } else if (pci_dev_present(pci_default
)) {
343 /* safe default value for PCI */
344 system_bus_speed
= 33;
346 /* safe default value for VESA and PCI */
347 system_bus_speed
= 50;
349 printk(KERN_INFO
"ide: Assuming %dMHz system bus speed "
350 "for PIO modes%s\n", system_bus_speed
,
351 idebus_parameter
? "" : "; override with idebus=xx");
353 return system_bus_speed
;
356 #ifdef CONFIG_PROC_FS
357 struct proc_dir_entry
*proc_ide_root
;
360 static struct resource
* hwif_request_region(ide_hwif_t
*hwif
,
361 unsigned long addr
, int num
)
363 struct resource
*res
= request_region(addr
, num
, hwif
->name
);
366 printk(KERN_ERR
"%s: I/O resource 0x%lX-0x%lX not free.\n",
367 hwif
->name
, addr
, addr
+num
-1);
372 * ide_hwif_request_regions - request resources for IDE
373 * @hwif: interface to use
375 * Requests all the needed resources for an interface.
376 * Right now core IDE code does this work which is deeply wrong.
377 * MMIO leaves it to the controller driver,
378 * PIO will migrate this way over time.
381 int ide_hwif_request_regions(ide_hwif_t
*hwif
)
388 BUG_ON(hwif
->mmio
== 1);
389 addr
= hwif
->io_ports
[IDE_CONTROL_OFFSET
];
390 if (addr
&& !hwif_request_region(hwif
, addr
, 1))
391 goto control_region_busy
;
393 addr
= hwif
->io_ports
[IDE_DATA_OFFSET
];
394 if ((addr
| 7) == hwif
->io_ports
[IDE_STATUS_OFFSET
]) {
395 if (!hwif_request_region(hwif
, addr
, 8))
396 goto data_region_busy
;
400 for (i
= IDE_DATA_OFFSET
; i
<= IDE_STATUS_OFFSET
; i
++) {
401 addr
= hwif
->io_ports
[i
];
402 if (!hwif_request_region(hwif
, addr
, 1)) {
404 release_region(addr
, 1);
405 goto data_region_busy
;
411 addr
= hwif
->io_ports
[IDE_CONTROL_OFFSET
];
413 release_region(addr
, 1);
415 /* If any errors are return, we drop the hwif interface. */
420 * ide_hwif_release_regions - free IDE resources
422 * Note that we only release the standard ports,
423 * and do not even try to handle any extra ports
424 * allocated for weird IDE interface chipsets.
426 * Note also that we don't yet handle mmio resources here. More
427 * importantly our caller should be doing this so we need to
428 * restructure this as a helper function for drivers.
431 void ide_hwif_release_regions(ide_hwif_t
*hwif
)
437 if (hwif
->io_ports
[IDE_CONTROL_OFFSET
])
438 release_region(hwif
->io_ports
[IDE_CONTROL_OFFSET
], 1);
439 if (hwif
->straight8
) {
440 release_region(hwif
->io_ports
[IDE_DATA_OFFSET
], 8);
443 for (i
= IDE_DATA_OFFSET
; i
<= IDE_STATUS_OFFSET
; i
++)
444 if (hwif
->io_ports
[i
])
445 release_region(hwif
->io_ports
[i
], 1);
449 * ide_hwif_restore - restore hwif to template
450 * @hwif: hwif to update
451 * @tmp_hwif: template
453 * Restore hwif to a previous state by copying most settngs
457 static void ide_hwif_restore(ide_hwif_t
*hwif
, ide_hwif_t
*tmp_hwif
)
459 hwif
->hwgroup
= tmp_hwif
->hwgroup
;
461 hwif
->gendev
.parent
= tmp_hwif
->gendev
.parent
;
463 hwif
->proc
= tmp_hwif
->proc
;
465 hwif
->major
= tmp_hwif
->major
;
466 hwif
->straight8
= tmp_hwif
->straight8
;
467 hwif
->bus_state
= tmp_hwif
->bus_state
;
469 hwif
->atapi_dma
= tmp_hwif
->atapi_dma
;
470 hwif
->ultra_mask
= tmp_hwif
->ultra_mask
;
471 hwif
->mwdma_mask
= tmp_hwif
->mwdma_mask
;
472 hwif
->swdma_mask
= tmp_hwif
->swdma_mask
;
474 hwif
->chipset
= tmp_hwif
->chipset
;
475 hwif
->hold
= tmp_hwif
->hold
;
477 #ifdef CONFIG_BLK_DEV_IDEPCI
478 hwif
->pci_dev
= tmp_hwif
->pci_dev
;
479 hwif
->cds
= tmp_hwif
->cds
;
482 hwif
->tuneproc
= tmp_hwif
->tuneproc
;
483 hwif
->speedproc
= tmp_hwif
->speedproc
;
484 hwif
->selectproc
= tmp_hwif
->selectproc
;
485 hwif
->reset_poll
= tmp_hwif
->reset_poll
;
486 hwif
->pre_reset
= tmp_hwif
->pre_reset
;
487 hwif
->resetproc
= tmp_hwif
->resetproc
;
488 hwif
->intrproc
= tmp_hwif
->intrproc
;
489 hwif
->maskproc
= tmp_hwif
->maskproc
;
490 hwif
->quirkproc
= tmp_hwif
->quirkproc
;
491 hwif
->busproc
= tmp_hwif
->busproc
;
493 hwif
->ata_input_data
= tmp_hwif
->ata_input_data
;
494 hwif
->ata_output_data
= tmp_hwif
->ata_output_data
;
495 hwif
->atapi_input_bytes
= tmp_hwif
->atapi_input_bytes
;
496 hwif
->atapi_output_bytes
= tmp_hwif
->atapi_output_bytes
;
498 hwif
->dma_setup
= tmp_hwif
->dma_setup
;
499 hwif
->dma_exec_cmd
= tmp_hwif
->dma_exec_cmd
;
500 hwif
->dma_start
= tmp_hwif
->dma_start
;
501 hwif
->ide_dma_end
= tmp_hwif
->ide_dma_end
;
502 hwif
->ide_dma_check
= tmp_hwif
->ide_dma_check
;
503 hwif
->ide_dma_on
= tmp_hwif
->ide_dma_on
;
504 hwif
->ide_dma_off_quietly
= tmp_hwif
->ide_dma_off_quietly
;
505 hwif
->ide_dma_test_irq
= tmp_hwif
->ide_dma_test_irq
;
506 hwif
->ide_dma_host_on
= tmp_hwif
->ide_dma_host_on
;
507 hwif
->ide_dma_host_off
= tmp_hwif
->ide_dma_host_off
;
508 hwif
->ide_dma_lostirq
= tmp_hwif
->ide_dma_lostirq
;
509 hwif
->ide_dma_timeout
= tmp_hwif
->ide_dma_timeout
;
511 hwif
->OUTB
= tmp_hwif
->OUTB
;
512 hwif
->OUTBSYNC
= tmp_hwif
->OUTBSYNC
;
513 hwif
->OUTW
= tmp_hwif
->OUTW
;
514 hwif
->OUTL
= tmp_hwif
->OUTL
;
515 hwif
->OUTSW
= tmp_hwif
->OUTSW
;
516 hwif
->OUTSL
= tmp_hwif
->OUTSL
;
518 hwif
->INB
= tmp_hwif
->INB
;
519 hwif
->INW
= tmp_hwif
->INW
;
520 hwif
->INL
= tmp_hwif
->INL
;
521 hwif
->INSW
= tmp_hwif
->INSW
;
522 hwif
->INSL
= tmp_hwif
->INSL
;
524 hwif
->sg_max_nents
= tmp_hwif
->sg_max_nents
;
526 hwif
->mmio
= tmp_hwif
->mmio
;
527 hwif
->rqsize
= tmp_hwif
->rqsize
;
528 hwif
->no_lba48
= tmp_hwif
->no_lba48
;
530 #ifndef CONFIG_BLK_DEV_IDECS
531 hwif
->irq
= tmp_hwif
->irq
;
534 hwif
->dma_base
= tmp_hwif
->dma_base
;
535 hwif
->dma_master
= tmp_hwif
->dma_master
;
536 hwif
->dma_command
= tmp_hwif
->dma_command
;
537 hwif
->dma_vendor1
= tmp_hwif
->dma_vendor1
;
538 hwif
->dma_status
= tmp_hwif
->dma_status
;
539 hwif
->dma_vendor3
= tmp_hwif
->dma_vendor3
;
540 hwif
->dma_prdtable
= tmp_hwif
->dma_prdtable
;
542 hwif
->dma_extra
= tmp_hwif
->dma_extra
;
543 hwif
->config_data
= tmp_hwif
->config_data
;
544 hwif
->select_data
= tmp_hwif
->select_data
;
545 hwif
->autodma
= tmp_hwif
->autodma
;
546 hwif
->udma_four
= tmp_hwif
->udma_four
;
547 hwif
->no_dsc
= tmp_hwif
->no_dsc
;
549 hwif
->hwif_data
= tmp_hwif
->hwif_data
;
553 * ide_unregister - free an ide interface
554 * @index: index of interface (will change soon to a pointer)
556 * Perform the final unregister of an IDE interface. At the moment
557 * we don't refcount interfaces so this will also get split up.
560 * The caller must not hold the IDE locks
561 * The drive present/vanishing is not yet properly locked
562 * Take care with the callbacks. These have been split to avoid
563 * deadlocking the IDE layer. The shutdown callback is called
564 * before we take the lock and free resources. It is up to the
565 * caller to be sure there is no pending I/O here, and that
566 * the interfce will not be reopened (present/vanishing locking
567 * isnt yet done btw). After we commit to the final kill we
568 * call the cleanup callback with the ide locks held.
570 * Unregister restores the hwif structures to the default state.
571 * This is raving bonkers.
574 void ide_unregister(unsigned int index
)
577 ide_hwif_t
*hwif
, *g
;
578 static ide_hwif_t tmp_hwif
; /* protected by ide_cfg_sem */
579 ide_hwgroup_t
*hwgroup
;
580 int irq_count
= 0, unit
;
582 BUG_ON(index
>= MAX_HWIFS
);
584 BUG_ON(in_interrupt());
585 BUG_ON(irqs_disabled());
587 spin_lock_irq(&ide_lock
);
588 hwif
= &ide_hwifs
[index
];
591 for (unit
= 0; unit
< MAX_DRIVES
; ++unit
) {
592 drive
= &hwif
->drives
[unit
];
595 spin_unlock_irq(&ide_lock
);
596 device_unregister(&drive
->gendev
);
597 wait_for_completion(&drive
->gendev_rel_comp
);
598 spin_lock_irq(&ide_lock
);
602 spin_unlock_irq(&ide_lock
);
604 destroy_proc_ide_interface(hwif
);
606 hwgroup
= hwif
->hwgroup
;
608 * free the irq if we were the only hwif using it
612 if (g
->irq
== hwif
->irq
)
615 } while (g
!= hwgroup
->hwif
);
617 free_irq(hwif
->irq
, hwgroup
);
619 spin_lock_irq(&ide_lock
);
621 * Note that we only release the standard ports,
622 * and do not even try to handle any extra ports
623 * allocated for weird IDE interface chipsets.
625 ide_hwif_release_regions(hwif
);
628 * Remove us from the hwgroup, and free
629 * the hwgroup if we were the only member
631 if (hwif
->next
== hwif
) {
632 BUG_ON(hwgroup
->hwif
!= hwif
);
635 /* There is another interface in hwgroup.
636 * Unlink us, and set hwgroup->drive and ->hwif to
640 while (g
->next
!= hwif
)
642 g
->next
= hwif
->next
;
643 if (hwgroup
->hwif
== hwif
) {
644 /* Chose a random hwif for hwgroup->hwif.
645 * It's guaranteed that there are no drives
646 * left in the hwgroup.
648 BUG_ON(hwgroup
->drive
!= NULL
);
651 BUG_ON(hwgroup
->hwif
== hwif
);
654 /* More messed up locking ... */
655 spin_unlock_irq(&ide_lock
);
656 device_unregister(&hwif
->gendev
);
657 wait_for_completion(&hwif
->gendev_rel_comp
);
660 * Remove us from the kernel's knowledge
662 blk_unregister_region(MKDEV(hwif
->major
, 0), MAX_DRIVES
<<PARTN_BITS
);
663 kfree(hwif
->sg_table
);
664 unregister_blkdev(hwif
->major
, hwif
->name
);
665 spin_lock_irq(&ide_lock
);
667 if (hwif
->dma_base
) {
668 (void) ide_release_dma(hwif
);
671 hwif
->dma_master
= 0;
672 hwif
->dma_command
= 0;
673 hwif
->dma_vendor1
= 0;
674 hwif
->dma_status
= 0;
675 hwif
->dma_vendor3
= 0;
676 hwif
->dma_prdtable
= 0;
679 /* copy original settings */
682 /* restore hwif data to pristine status */
683 init_hwif_data(hwif
, index
);
684 init_hwif_default(hwif
, index
);
686 ide_hwif_restore(hwif
, &tmp_hwif
);
689 spin_unlock_irq(&ide_lock
);
693 EXPORT_SYMBOL(ide_unregister
);
697 * ide_setup_ports - set up IDE interface ports
698 * @hw: register descriptions
699 * @base: base register
700 * @offsets: table of register offsets
701 * @ctrl: control register
703 * @irq: interrupt lie
705 * Setup hw_regs_t structure described by parameters. You
706 * may set up the hw structure yourself OR use this routine to
707 * do it for you. This is basically a helper
711 void ide_setup_ports ( hw_regs_t
*hw
,
712 unsigned long base
, int *offsets
,
713 unsigned long ctrl
, unsigned long intr
,
714 ide_ack_intr_t
*ack_intr
,
716 * ide_io_ops_t *iops,
722 memset(hw
, 0, sizeof(hw_regs_t
));
723 for (i
= 0; i
< IDE_NR_PORTS
; i
++) {
724 if (offsets
[i
] == -1) {
726 case IDE_CONTROL_OFFSET
:
727 hw
->io_ports
[i
] = ctrl
;
729 #if defined(CONFIG_AMIGA) || defined(CONFIG_MAC)
731 hw
->io_ports
[i
] = intr
;
733 #endif /* (CONFIG_AMIGA) || (CONFIG_MAC) */
739 hw
->io_ports
[i
] = base
+ offsets
[i
];
744 hw
->ack_intr
= ack_intr
;
751 * ide_register_hw_with_fixup - register IDE interface
752 * @hw: hardware registers
753 * @hwifp: pointer to returned hwif
754 * @fixup: fixup function
756 * Register an IDE interface, specifying exactly the registers etc.
757 * Set init=1 iff calling before probes have taken place.
759 * Returns -1 on error.
762 int ide_register_hw_with_fixup(hw_regs_t
*hw
, ide_hwif_t
**hwifp
, void(*fixup
)(ide_hwif_t
*hwif
))
764 int index
, retry
= 1;
768 for (index
= 0; index
< MAX_HWIFS
; ++index
) {
769 hwif
= &ide_hwifs
[index
];
770 if (hwif
->hw
.io_ports
[IDE_DATA_OFFSET
] == hw
->io_ports
[IDE_DATA_OFFSET
])
773 for (index
= 0; index
< MAX_HWIFS
; ++index
) {
774 hwif
= &ide_hwifs
[index
];
777 if ((!hwif
->present
&& !hwif
->mate
&& !initializing
) ||
778 (!hwif
->hw
.io_ports
[IDE_DATA_OFFSET
] && initializing
))
781 for (index
= 0; index
< MAX_HWIFS
; index
++)
782 ide_unregister(index
);
787 ide_unregister(index
);
788 else if (!hwif
->hold
) {
789 init_hwif_data(hwif
, index
);
790 init_hwif_default(hwif
, index
);
794 memcpy(&hwif
->hw
, hw
, sizeof(*hw
));
795 memcpy(hwif
->io_ports
, hwif
->hw
.io_ports
, sizeof(hwif
->hw
.io_ports
));
798 hwif
->chipset
= hw
->chipset
;
799 hwif
->gendev
.parent
= hw
->dev
;
802 probe_hwif_init_with_fixup(hwif
, fixup
);
803 create_proc_ide_interfaces();
809 return (initializing
|| hwif
->present
) ? index
: -1;
812 EXPORT_SYMBOL(ide_register_hw_with_fixup
);
814 int ide_register_hw(hw_regs_t
*hw
, ide_hwif_t
**hwifp
)
816 return ide_register_hw_with_fixup(hw
, hwifp
, NULL
);
819 EXPORT_SYMBOL(ide_register_hw
);
822 * Locks for IDE setting functionality
825 DECLARE_MUTEX(ide_setting_sem
);
828 * __ide_add_setting - add an ide setting option
829 * @drive: drive to use
830 * @name: setting name
831 * @rw: true if the function is read write
832 * @read_ioctl: function to call on read
833 * @write_ioctl: function to call on write
834 * @data_type: type of data
835 * @min: range minimum
836 * @max: range maximum
837 * @mul_factor: multiplication scale
838 * @div_factor: divison scale
839 * @data: private data field
841 * @auto_remove: setting auto removal flag
843 * Removes the setting named from the device if it is present.
844 * The function takes the settings_lock to protect against
845 * parallel changes. This function must not be called from IRQ
846 * context. Returns 0 on success or -1 on failure.
848 * BUGS: This code is seriously over-engineered. There is also
849 * magic about how the driver specific features are setup. If
850 * a driver is attached we assume the driver settings are auto
854 static int __ide_add_setting(ide_drive_t
*drive
, const char *name
, int rw
, int read_ioctl
, int write_ioctl
, int data_type
, int min
, int max
, int mul_factor
, int div_factor
, void *data
, ide_procset_t
*set
, int auto_remove
)
856 ide_settings_t
**p
= (ide_settings_t
**) &drive
->settings
, *setting
= NULL
;
858 down(&ide_setting_sem
);
859 while ((*p
) && strcmp((*p
)->name
, name
) < 0)
861 if ((setting
= kzalloc(sizeof(*setting
), GFP_KERNEL
)) == NULL
)
863 if ((setting
->name
= kmalloc(strlen(name
) + 1, GFP_KERNEL
)) == NULL
)
865 strcpy(setting
->name
, name
);
867 setting
->read_ioctl
= read_ioctl
;
868 setting
->write_ioctl
= write_ioctl
;
869 setting
->data_type
= data_type
;
872 setting
->mul_factor
= mul_factor
;
873 setting
->div_factor
= div_factor
;
874 setting
->data
= data
;
879 setting
->auto_remove
= 1;
881 up(&ide_setting_sem
);
884 up(&ide_setting_sem
);
889 int ide_add_setting(ide_drive_t
*drive
, const char *name
, int rw
, int read_ioctl
, int write_ioctl
, int data_type
, int min
, int max
, int mul_factor
, int div_factor
, void *data
, ide_procset_t
*set
)
891 return __ide_add_setting(drive
, name
, rw
, read_ioctl
, write_ioctl
, data_type
, min
, max
, mul_factor
, div_factor
, data
, set
, 1);
894 EXPORT_SYMBOL(ide_add_setting
);
897 * __ide_remove_setting - remove an ide setting option
898 * @drive: drive to use
899 * @name: setting name
901 * Removes the setting named from the device if it is present.
902 * The caller must hold the setting semaphore.
905 static void __ide_remove_setting (ide_drive_t
*drive
, char *name
)
907 ide_settings_t
**p
, *setting
;
909 p
= (ide_settings_t
**) &drive
->settings
;
911 while ((*p
) && strcmp((*p
)->name
, name
))
913 if ((setting
= (*p
)) == NULL
)
916 (*p
) = setting
->next
;
918 kfree(setting
->name
);
923 * ide_find_setting_by_ioctl - find a drive specific ioctl
924 * @drive: drive to scan
925 * @cmd: ioctl command to handle
927 * Scan's the device setting table for a matching entry and returns
928 * this or NULL if no entry is found. The caller must hold the
932 static ide_settings_t
*ide_find_setting_by_ioctl (ide_drive_t
*drive
, int cmd
)
934 ide_settings_t
*setting
= drive
->settings
;
937 if (setting
->read_ioctl
== cmd
|| setting
->write_ioctl
== cmd
)
939 setting
= setting
->next
;
946 * ide_find_setting_by_name - find a drive specific setting
947 * @drive: drive to scan
948 * @name: setting name
950 * Scan's the device setting table for a matching entry and returns
951 * this or NULL if no entry is found. The caller must hold the
955 ide_settings_t
*ide_find_setting_by_name (ide_drive_t
*drive
, char *name
)
957 ide_settings_t
*setting
= drive
->settings
;
960 if (strcmp(setting
->name
, name
) == 0)
962 setting
= setting
->next
;
968 * auto_remove_settings - remove driver specific settings
971 * Automatically remove all the driver specific settings for this
972 * drive. This function may sleep and must not be called from IRQ
973 * context. The caller must hold ide_setting_sem.
976 static void auto_remove_settings (ide_drive_t
*drive
)
978 ide_settings_t
*setting
;
980 setting
= drive
->settings
;
982 if (setting
->auto_remove
) {
983 __ide_remove_setting(drive
, setting
->name
);
986 setting
= setting
->next
;
991 * ide_read_setting - read an IDE setting
992 * @drive: drive to read from
993 * @setting: drive setting
995 * Read a drive setting and return the value. The caller
996 * must hold the ide_setting_sem when making this call.
998 * BUGS: the data return and error are the same return value
999 * so an error -EINVAL and true return of the same value cannot
1003 int ide_read_setting (ide_drive_t
*drive
, ide_settings_t
*setting
)
1006 unsigned long flags
;
1008 if ((setting
->rw
& SETTING_READ
)) {
1009 spin_lock_irqsave(&ide_lock
, flags
);
1010 switch(setting
->data_type
) {
1012 val
= *((u8
*) setting
->data
);
1015 val
= *((u16
*) setting
->data
);
1019 val
= *((u32
*) setting
->data
);
1022 spin_unlock_irqrestore(&ide_lock
, flags
);
1028 * ide_spin_wait_hwgroup - wait for group
1029 * @drive: drive in the group
1031 * Wait for an IDE device group to go non busy and then return
1032 * holding the ide_lock which guards the hwgroup->busy status
1033 * and right to use it.
1036 int ide_spin_wait_hwgroup (ide_drive_t
*drive
)
1038 ide_hwgroup_t
*hwgroup
= HWGROUP(drive
);
1039 unsigned long timeout
= jiffies
+ (3 * HZ
);
1041 spin_lock_irq(&ide_lock
);
1043 while (hwgroup
->busy
) {
1044 unsigned long lflags
;
1045 spin_unlock_irq(&ide_lock
);
1046 local_irq_set(lflags
);
1047 if (time_after(jiffies
, timeout
)) {
1048 local_irq_restore(lflags
);
1049 printk(KERN_ERR
"%s: channel busy\n", drive
->name
);
1052 local_irq_restore(lflags
);
1053 spin_lock_irq(&ide_lock
);
1058 EXPORT_SYMBOL(ide_spin_wait_hwgroup
);
1061 * ide_write_setting - read an IDE setting
1062 * @drive: drive to read from
1063 * @setting: drive setting
1066 * Write a drive setting if it is possible. The caller
1067 * must hold the ide_setting_sem when making this call.
1069 * BUGS: the data return and error are the same return value
1070 * so an error -EINVAL and true return of the same value cannot
1073 * FIXME: This should be changed to enqueue a special request
1074 * to the driver to change settings, and then wait on a sema for completion.
1075 * The current scheme of polling is kludgy, though safe enough.
1078 int ide_write_setting (ide_drive_t
*drive
, ide_settings_t
*setting
, int val
)
1083 if (!capable(CAP_SYS_ADMIN
))
1085 if (!(setting
->rw
& SETTING_WRITE
))
1087 if (val
< setting
->min
|| val
> setting
->max
)
1090 return setting
->set(drive
, val
);
1091 if (ide_spin_wait_hwgroup(drive
))
1093 switch (setting
->data_type
) {
1095 *((u8
*) setting
->data
) = val
;
1098 *((u16
*) setting
->data
) = val
;
1101 *((u32
*) setting
->data
) = val
;
1104 p
= (u32
*) setting
->data
;
1105 for (i
= 0; i
< 1 << PARTN_BITS
; i
++, p
++)
1109 spin_unlock_irq(&ide_lock
);
1113 static int set_io_32bit(ide_drive_t
*drive
, int arg
)
1115 drive
->io_32bit
= arg
;
1116 #ifdef CONFIG_BLK_DEV_DTC2278
1117 if (HWIF(drive
)->chipset
== ide_dtc2278
)
1118 HWIF(drive
)->drives
[!drive
->select
.b
.unit
].io_32bit
= arg
;
1119 #endif /* CONFIG_BLK_DEV_DTC2278 */
1123 static int set_using_dma (ide_drive_t
*drive
, int arg
)
1125 #ifdef CONFIG_BLK_DEV_IDEDMA
1126 if (!drive
->id
|| !(drive
->id
->capability
& 1))
1128 if (HWIF(drive
)->ide_dma_check
== NULL
)
1131 if (HWIF(drive
)->ide_dma_check(drive
)) return -EIO
;
1132 if (HWIF(drive
)->ide_dma_on(drive
)) return -EIO
;
1134 if (__ide_dma_off(drive
))
1143 static int set_pio_mode (ide_drive_t
*drive
, int arg
)
1147 if (!HWIF(drive
)->tuneproc
)
1149 if (drive
->special
.b
.set_tune
)
1151 ide_init_drive_cmd(&rq
);
1152 drive
->tune_req
= (u8
) arg
;
1153 drive
->special
.b
.set_tune
= 1;
1154 (void) ide_do_drive_cmd(drive
, &rq
, ide_wait
);
1158 static int set_xfer_rate (ide_drive_t
*drive
, int arg
)
1160 int err
= ide_wait_cmd(drive
,
1161 WIN_SETFEATURES
, (u8
) arg
,
1162 SETFEATURES_XFER
, 0, NULL
);
1165 ide_set_xfer_rate(drive
, (u8
) arg
);
1166 ide_driveid_update(drive
);
1172 * ide_add_generic_settings - generic ide settings
1173 * @drive: drive being configured
1175 * Add the generic parts of the system settings to the /proc files and
1176 * ioctls for this IDE device. The caller must not be holding the
1180 void ide_add_generic_settings (ide_drive_t
*drive
)
1183 * drive setting name read/write access read ioctl write ioctl data type min max mul_factor div_factor data pointer set function
1185 __ide_add_setting(drive
, "io_32bit", drive
->no_io_32bit
? SETTING_READ
: SETTING_RW
, HDIO_GET_32BIT
, HDIO_SET_32BIT
, TYPE_BYTE
, 0, 1 + (SUPPORT_VLB_SYNC
<< 1), 1, 1, &drive
->io_32bit
, set_io_32bit
, 0);
1186 __ide_add_setting(drive
, "keepsettings", SETTING_RW
, HDIO_GET_KEEPSETTINGS
, HDIO_SET_KEEPSETTINGS
, TYPE_BYTE
, 0, 1, 1, 1, &drive
->keep_settings
, NULL
, 0);
1187 __ide_add_setting(drive
, "nice1", SETTING_RW
, -1, -1, TYPE_BYTE
, 0, 1, 1, 1, &drive
->nice1
, NULL
, 0);
1188 __ide_add_setting(drive
, "pio_mode", SETTING_WRITE
, -1, HDIO_SET_PIO_MODE
, TYPE_BYTE
, 0, 255, 1, 1, NULL
, set_pio_mode
, 0);
1189 __ide_add_setting(drive
, "unmaskirq", drive
->no_unmask
? SETTING_READ
: SETTING_RW
, HDIO_GET_UNMASKINTR
, HDIO_SET_UNMASKINTR
, TYPE_BYTE
, 0, 1, 1, 1, &drive
->unmask
, NULL
, 0);
1190 __ide_add_setting(drive
, "using_dma", SETTING_RW
, HDIO_GET_DMA
, HDIO_SET_DMA
, TYPE_BYTE
, 0, 1, 1, 1, &drive
->using_dma
, set_using_dma
, 0);
1191 __ide_add_setting(drive
, "init_speed", SETTING_RW
, -1, -1, TYPE_BYTE
, 0, 70, 1, 1, &drive
->init_speed
, NULL
, 0);
1192 __ide_add_setting(drive
, "current_speed", SETTING_RW
, -1, -1, TYPE_BYTE
, 0, 70, 1, 1, &drive
->current_speed
, set_xfer_rate
, 0);
1193 __ide_add_setting(drive
, "number", SETTING_RW
, -1, -1, TYPE_BYTE
, 0, 3, 1, 1, &drive
->dn
, NULL
, 0);
1197 * system_bus_clock - clock guess
1199 * External version of the bus clock guess used by very old IDE drivers
1200 * for things like VLB timings. Should not be used.
1203 int system_bus_clock (void)
1205 return((int) ((!system_bus_speed
) ? ide_system_bus_speed() : system_bus_speed
));
1208 EXPORT_SYMBOL(system_bus_clock
);
1210 static int generic_ide_suspend(struct device
*dev
, pm_message_t state
)
1212 ide_drive_t
*drive
= dev
->driver_data
;
1214 struct request_pm_state rqpm
;
1217 memset(&rq
, 0, sizeof(rq
));
1218 memset(&rqpm
, 0, sizeof(rqpm
));
1219 memset(&args
, 0, sizeof(args
));
1220 rq
.flags
= REQ_PM_SUSPEND
;
1222 rq
.end_io_data
= &rqpm
;
1223 rqpm
.pm_step
= ide_pm_state_start_suspend
;
1224 rqpm
.pm_state
= state
.event
;
1226 return ide_do_drive_cmd(drive
, &rq
, ide_wait
);
1229 static int generic_ide_resume(struct device
*dev
)
1231 ide_drive_t
*drive
= dev
->driver_data
;
1233 struct request_pm_state rqpm
;
1236 memset(&rq
, 0, sizeof(rq
));
1237 memset(&rqpm
, 0, sizeof(rqpm
));
1238 memset(&args
, 0, sizeof(args
));
1239 rq
.flags
= REQ_PM_RESUME
;
1241 rq
.end_io_data
= &rqpm
;
1242 rqpm
.pm_step
= ide_pm_state_start_resume
;
1243 rqpm
.pm_state
= PM_EVENT_ON
;
1245 return ide_do_drive_cmd(drive
, &rq
, ide_head_wait
);
1248 int generic_ide_ioctl(ide_drive_t
*drive
, struct file
*file
, struct block_device
*bdev
,
1249 unsigned int cmd
, unsigned long arg
)
1251 ide_settings_t
*setting
;
1254 void __user
*p
= (void __user
*)arg
;
1256 down(&ide_setting_sem
);
1257 if ((setting
= ide_find_setting_by_ioctl(drive
, cmd
)) != NULL
) {
1258 if (cmd
== setting
->read_ioctl
) {
1259 err
= ide_read_setting(drive
, setting
);
1260 up(&ide_setting_sem
);
1261 return err
>= 0 ? put_user(err
, (long __user
*)arg
) : err
;
1263 if (bdev
!= bdev
->bd_contains
)
1266 err
= ide_write_setting(drive
, setting
, arg
);
1267 up(&ide_setting_sem
);
1271 up(&ide_setting_sem
);
1274 case HDIO_OBSOLETE_IDENTITY
:
1275 case HDIO_GET_IDENTITY
:
1276 if (bdev
!= bdev
->bd_contains
)
1278 if (drive
->id_read
== 0)
1280 if (copy_to_user(p
, drive
->id
, (cmd
== HDIO_GET_IDENTITY
) ? sizeof(*drive
->id
) : 142))
1285 return put_user(drive
->dsc_overlap
<< IDE_NICE_DSC_OVERLAP
|
1286 drive
->atapi_overlap
<< IDE_NICE_ATAPI_OVERLAP
|
1287 drive
->nice0
<< IDE_NICE_0
|
1288 drive
->nice1
<< IDE_NICE_1
|
1289 drive
->nice2
<< IDE_NICE_2
,
1290 (long __user
*) arg
);
1292 #ifdef CONFIG_IDE_TASK_IOCTL
1293 case HDIO_DRIVE_TASKFILE
:
1294 if (!capable(CAP_SYS_ADMIN
) || !capable(CAP_SYS_RAWIO
))
1296 switch(drive
->media
) {
1298 return ide_taskfile_ioctl(drive
, cmd
, arg
);
1302 #endif /* CONFIG_IDE_TASK_IOCTL */
1304 case HDIO_DRIVE_CMD
:
1305 if (!capable(CAP_SYS_RAWIO
))
1307 return ide_cmd_ioctl(drive
, cmd
, arg
);
1309 case HDIO_DRIVE_TASK
:
1310 if (!capable(CAP_SYS_RAWIO
))
1312 return ide_task_ioctl(drive
, cmd
, arg
);
1314 case HDIO_SCAN_HWIF
:
1318 if (!capable(CAP_SYS_RAWIO
)) return -EACCES
;
1319 if (copy_from_user(args
, p
, 3 * sizeof(int)))
1321 memset(&hw
, 0, sizeof(hw
));
1322 ide_init_hwif_ports(&hw
, (unsigned long) args
[0],
1323 (unsigned long) args
[1], NULL
);
1325 if (ide_register_hw(&hw
, NULL
) == -1)
1329 case HDIO_UNREGISTER_HWIF
:
1330 if (!capable(CAP_SYS_RAWIO
)) return -EACCES
;
1331 /* (arg > MAX_HWIFS) checked in function */
1332 ide_unregister(arg
);
1335 if (!capable(CAP_SYS_ADMIN
)) return -EACCES
;
1336 if (arg
!= (arg
& ((1 << IDE_NICE_DSC_OVERLAP
) | (1 << IDE_NICE_1
))))
1338 drive
->dsc_overlap
= (arg
>> IDE_NICE_DSC_OVERLAP
) & 1;
1339 drv
= *(ide_driver_t
**)bdev
->bd_disk
->private_data
;
1340 if (drive
->dsc_overlap
&& !drv
->supports_dsc_overlap
) {
1341 drive
->dsc_overlap
= 0;
1344 drive
->nice1
= (arg
>> IDE_NICE_1
) & 1;
1346 case HDIO_DRIVE_RESET
:
1348 unsigned long flags
;
1349 if (!capable(CAP_SYS_ADMIN
)) return -EACCES
;
1352 * Abort the current command on the
1353 * group if there is one, taking
1354 * care not to allow anything else
1355 * to be queued and to die on the
1356 * spot if we miss one somehow
1359 spin_lock_irqsave(&ide_lock
, flags
);
1361 ide_abort(drive
, "drive reset");
1363 BUG_ON(HWGROUP(drive
)->handler
);
1365 /* Ensure nothing gets queued after we
1366 drop the lock. Reset will clear the busy */
1368 HWGROUP(drive
)->busy
= 1;
1369 spin_unlock_irqrestore(&ide_lock
, flags
);
1370 (void) ide_do_reset(drive
);
1376 case CDROMCLOSETRAY
:
1377 return scsi_cmd_ioctl(file
, bdev
->bd_disk
, cmd
, p
);
1379 case HDIO_GET_BUSSTATE
:
1380 if (!capable(CAP_SYS_ADMIN
))
1382 if (put_user(HWIF(drive
)->bus_state
, (long __user
*)arg
))
1386 case HDIO_SET_BUSSTATE
:
1387 if (!capable(CAP_SYS_ADMIN
))
1389 if (HWIF(drive
)->busproc
)
1390 return HWIF(drive
)->busproc(drive
, (int)arg
);
1397 EXPORT_SYMBOL(generic_ide_ioctl
);
1400 * stridx() returns the offset of c within s,
1401 * or -1 if c is '\0' or not found within s.
1403 static int __init
stridx (const char *s
, char c
)
1405 char *i
= strchr(s
, c
);
1406 return (i
&& c
) ? i
- s
: -1;
1410 * match_parm() does parsing for ide_setup():
1412 * 1. the first char of s must be '='.
1413 * 2. if the remainder matches one of the supplied keywords,
1414 * the index (1 based) of the keyword is negated and returned.
1415 * 3. if the remainder is a series of no more than max_vals numbers
1416 * separated by commas, the numbers are saved in vals[] and a
1417 * count of how many were saved is returned. Base10 is assumed,
1418 * and base16 is allowed when prefixed with "0x".
1419 * 4. otherwise, zero is returned.
1421 static int __init
match_parm (char *s
, const char *keywords
[], int vals
[], int max_vals
)
1423 static const char *decimal
= "0123456789";
1424 static const char *hex
= "0123456789abcdef";
1429 * Try matching against the supplied keywords,
1430 * and return -(index+1) if we match one
1432 if (keywords
!= NULL
) {
1433 for (i
= 0; *keywords
!= NULL
; ++i
) {
1434 if (!strcmp(s
, *keywords
++))
1439 * Look for a series of no more than "max_vals"
1440 * numeric values separated by commas, in base10,
1441 * or base16 when prefixed with "0x".
1442 * Return a count of how many were found.
1444 for (n
= 0; (i
= stridx(decimal
, *s
)) >= 0;) {
1446 while ((i
= stridx(decimal
, *++s
)) >= 0)
1447 vals
[n
] = (vals
[n
] * 10) + i
;
1448 if (*s
== 'x' && !vals
[n
]) {
1449 while ((i
= stridx(hex
, *++s
)) >= 0)
1450 vals
[n
] = (vals
[n
] * 0x10) + i
;
1452 if (++n
== max_vals
)
1454 if (*s
== ',' || *s
== ';')
1460 return 0; /* zero = nothing matched */
1463 #ifdef CONFIG_BLK_DEV_ALI14XX
1464 static int __initdata probe_ali14xx
;
1465 extern int ali14xx_init(void);
1467 #ifdef CONFIG_BLK_DEV_UMC8672
1468 static int __initdata probe_umc8672
;
1469 extern int umc8672_init(void);
1471 #ifdef CONFIG_BLK_DEV_DTC2278
1472 static int __initdata probe_dtc2278
;
1473 extern int dtc2278_init(void);
1475 #ifdef CONFIG_BLK_DEV_HT6560B
1476 static int __initdata probe_ht6560b
;
1477 extern int ht6560b_init(void);
1479 #ifdef CONFIG_BLK_DEV_QD65XX
1480 static int __initdata probe_qd65xx
;
1481 extern int qd65xx_init(void);
1484 static int __initdata is_chipset_set
[MAX_HWIFS
];
1487 * ide_setup() gets called VERY EARLY during initialization,
1488 * to handle kernel "command line" strings beginning with "hdx=" or "ide".
1490 * Remember to update Documentation/ide.txt if you change something here.
1492 static int __init
ide_setup(char *s
)
1497 unsigned int hw
, unit
;
1498 const char max_drive
= 'a' + ((MAX_HWIFS
* MAX_DRIVES
) - 1);
1499 const char max_hwif
= '0' + (MAX_HWIFS
- 1);
1502 if (strncmp(s
,"hd",2) == 0 && s
[2] == '=') /* hd= is for hd.c */
1503 return 0; /* driver and not us */
1505 if (strncmp(s
,"ide",3) && strncmp(s
,"idebus",6) && strncmp(s
,"hd",2))
1508 printk(KERN_INFO
"ide_setup: %s", s
);
1511 #ifdef CONFIG_BLK_DEV_IDEDOUBLER
1512 if (!strcmp(s
, "ide=doubler")) {
1513 extern int ide_doubler
;
1515 printk(" : Enabled support for IDE doublers\n");
1519 #endif /* CONFIG_BLK_DEV_IDEDOUBLER */
1521 if (!strcmp(s
, "ide=nodma")) {
1522 printk(" : Prevented DMA\n");
1527 #ifdef CONFIG_BLK_DEV_IDEPCI
1528 if (!strcmp(s
, "ide=reverse")) {
1529 ide_scan_direction
= 1;
1530 printk(" : Enabled support for IDE inverse scan order.\n");
1533 #endif /* CONFIG_BLK_DEV_IDEPCI */
1536 * Look for drive options: "hdx="
1538 if (s
[0] == 'h' && s
[1] == 'd' && s
[2] >= 'a' && s
[2] <= max_drive
) {
1539 const char *hd_words
[] = {
1540 "none", "noprobe", "nowerr", "cdrom", "serialize",
1541 "autotune", "noautotune", "minus8", "swapdata", "bswap",
1542 "minus11", "remap", "remap63", "scsi", NULL
};
1544 hw
= unit
/ MAX_DRIVES
;
1545 unit
= unit
% MAX_DRIVES
;
1546 hwif
= &ide_hwifs
[hw
];
1547 drive
= &hwif
->drives
[unit
];
1548 if (strncmp(s
+ 4, "ide-", 4) == 0) {
1549 strlcpy(drive
->driver_req
, s
+ 4, sizeof(drive
->driver_req
));
1552 switch (match_parm(&s
[3], hd_words
, vals
, 3)) {
1553 case -1: /* "none" */
1554 case -2: /* "noprobe" */
1557 case -3: /* "nowerr" */
1558 drive
->bad_wstat
= BAD_R_STAT
;
1561 case -4: /* "cdrom" */
1563 drive
->media
= ide_cdrom
;
1564 /* an ATAPI device ignores DRDY */
1565 drive
->ready_stat
= 0;
1568 case -5: /* "serialize" */
1569 printk(" -- USE \"ide%d=serialize\" INSTEAD", hw
);
1571 case -6: /* "autotune" */
1572 drive
->autotune
= IDE_TUNE_AUTO
;
1573 goto obsolete_option
;
1574 case -7: /* "noautotune" */
1575 drive
->autotune
= IDE_TUNE_NOAUTO
;
1576 goto obsolete_option
;
1577 case -9: /* "swapdata" */
1578 case -10: /* "bswap" */
1581 case -12: /* "remap" */
1582 drive
->remap_0_to_1
= 1;
1584 case -13: /* "remap63" */
1587 case -14: /* "scsi" */
1590 case 3: /* cyl,head,sect */
1591 drive
->media
= ide_disk
;
1592 drive
->ready_stat
= READY_STAT
;
1593 drive
->cyl
= drive
->bios_cyl
= vals
[0];
1594 drive
->head
= drive
->bios_head
= vals
[1];
1595 drive
->sect
= drive
->bios_sect
= vals
[2];
1597 drive
->forced_geom
= 1;
1605 if (s
[0] != 'i' || s
[1] != 'd' || s
[2] != 'e')
1608 * Look for bus speed option: "idebus="
1610 if (s
[3] == 'b' && s
[4] == 'u' && s
[5] == 's') {
1611 if (match_parm(&s
[6], NULL
, vals
, 1) != 1)
1613 if (vals
[0] >= 20 && vals
[0] <= 66) {
1614 idebus_parameter
= vals
[0];
1616 printk(" -- BAD BUS SPEED! Expected value from 20 to 66");
1620 * Look for interface options: "idex="
1622 if (s
[3] >= '0' && s
[3] <= max_hwif
) {
1624 * Be VERY CAREFUL changing this: note hardcoded indexes below
1625 * (-8, -9, -10) are reserved to ease the hardcoding.
1627 static const char *ide_words
[] = {
1628 "noprobe", "serialize", "autotune", "noautotune",
1629 "reset", "dma", "ata66", "minus8", "minus9",
1630 "minus10", "four", "qd65xx", "ht6560b", "cmd640_vlb",
1631 "dtc2278", "umc8672", "ali14xx", NULL
};
1633 hwif
= &ide_hwifs
[hw
];
1634 i
= match_parm(&s
[4], ide_words
, vals
, 3);
1637 * Cryptic check to ensure chipset not already set for hwif.
1638 * Note: we can't depend on hwif->chipset here.
1640 if ((i
>= -18 && i
<= -11) || (i
> 0 && i
<= 3)) {
1641 /* chipset already specified */
1642 if (is_chipset_set
[hw
])
1644 if (i
> -18 && i
<= -11) {
1645 /* these drivers are for "ide0=" only */
1648 /* chipset already specified for 2nd port */
1649 if (is_chipset_set
[hw
+1])
1652 is_chipset_set
[hw
] = 1;
1657 #ifdef CONFIG_BLK_DEV_ALI14XX
1658 case -17: /* "ali14xx" */
1662 #ifdef CONFIG_BLK_DEV_UMC8672
1663 case -16: /* "umc8672" */
1667 #ifdef CONFIG_BLK_DEV_DTC2278
1668 case -15: /* "dtc2278" */
1672 #ifdef CONFIG_BLK_DEV_CMD640
1673 case -14: /* "cmd640_vlb" */
1675 extern int cmd640_vlb
; /* flag for cmd640.c */
1680 #ifdef CONFIG_BLK_DEV_HT6560B
1681 case -13: /* "ht6560b" */
1685 #ifdef CONFIG_BLK_DEV_QD65XX
1686 case -12: /* "qd65xx" */
1690 #ifdef CONFIG_BLK_DEV_4DRIVES
1691 case -11: /* "four" drives on one set of ports */
1693 ide_hwif_t
*mate
= &ide_hwifs
[hw
^1];
1694 mate
->drives
[0].select
.all
^= 0x20;
1695 mate
->drives
[1].select
.all
^= 0x20;
1696 hwif
->chipset
= mate
->chipset
= ide_4drives
;
1697 mate
->irq
= hwif
->irq
;
1698 memcpy(mate
->io_ports
, hwif
->io_ports
, sizeof(hwif
->io_ports
));
1701 #endif /* CONFIG_BLK_DEV_4DRIVES */
1702 case -10: /* minus10 */
1703 case -9: /* minus9 */
1704 case -8: /* minus8 */
1706 case -7: /* ata66 */
1707 #ifdef CONFIG_BLK_DEV_IDEPCI
1708 hwif
->udma_four
= 1;
1709 goto obsolete_option
;
1715 goto obsolete_option
;
1716 case -5: /* "reset" */
1718 goto obsolete_option
;
1719 case -4: /* "noautotune" */
1720 hwif
->drives
[0].autotune
= IDE_TUNE_NOAUTO
;
1721 hwif
->drives
[1].autotune
= IDE_TUNE_NOAUTO
;
1722 goto obsolete_option
;
1723 case -3: /* "autotune" */
1724 hwif
->drives
[0].autotune
= IDE_TUNE_AUTO
;
1725 hwif
->drives
[1].autotune
= IDE_TUNE_AUTO
;
1726 goto obsolete_option
;
1727 case -2: /* "serialize" */
1729 hwif
->mate
= &ide_hwifs
[hw
^1];
1730 hwif
->mate
->mate
= hwif
;
1731 hwif
->serialized
= hwif
->mate
->serialized
= 1;
1732 goto obsolete_option
;
1734 case -1: /* "noprobe" */
1739 vals
[1] = vals
[0] + 0x206; /* default ctl */
1740 case 2: /* base,ctl */
1741 vals
[2] = 0; /* default irq = probe for it */
1742 case 3: /* base,ctl,irq */
1743 hwif
->hw
.irq
= vals
[2];
1744 ide_init_hwif_ports(&hwif
->hw
, (unsigned long) vals
[0], (unsigned long) vals
[1], &hwif
->irq
);
1745 memcpy(hwif
->io_ports
, hwif
->hw
.io_ports
, sizeof(hwif
->io_ports
));
1746 hwif
->irq
= vals
[2];
1748 hwif
->chipset
= ide_forced
;
1749 goto obsolete_option
;
1751 case 0: goto bad_option
;
1753 printk(" -- SUPPORT NOT CONFIGURED IN THIS KERNEL\n");
1758 printk(" -- BAD OPTION\n");
1761 printk(" -- OBSOLETE OPTION, WILL BE REMOVED SOON!\n");
1764 printk("-- NOT SUPPORTED ON ide%d", hw
);
1770 extern void pnpide_init(void);
1771 extern void h8300_ide_init(void);
1774 * probe_for_hwifs() finds/initializes "known" IDE interfaces
1776 static void __init
probe_for_hwifs (void)
1778 #ifdef CONFIG_BLK_DEV_IDEPCI
1779 ide_scan_pcibus(ide_scan_direction
);
1780 #endif /* CONFIG_BLK_DEV_IDEPCI */
1782 #ifdef CONFIG_ETRAX_IDE
1784 extern void init_e100_ide(void);
1787 #endif /* CONFIG_ETRAX_IDE */
1788 #ifdef CONFIG_BLK_DEV_CMD640
1790 extern void ide_probe_for_cmd640x(void);
1791 ide_probe_for_cmd640x();
1793 #endif /* CONFIG_BLK_DEV_CMD640 */
1794 #ifdef CONFIG_BLK_DEV_IDE_PMAC
1796 extern void pmac_ide_probe(void);
1799 #endif /* CONFIG_BLK_DEV_IDE_PMAC */
1800 #ifdef CONFIG_BLK_DEV_GAYLE
1802 extern void gayle_init(void);
1805 #endif /* CONFIG_BLK_DEV_GAYLE */
1806 #ifdef CONFIG_BLK_DEV_FALCON_IDE
1808 extern void falconide_init(void);
1811 #endif /* CONFIG_BLK_DEV_FALCON_IDE */
1812 #ifdef CONFIG_BLK_DEV_MAC_IDE
1814 extern void macide_init(void);
1817 #endif /* CONFIG_BLK_DEV_MAC_IDE */
1818 #ifdef CONFIG_BLK_DEV_Q40IDE
1820 extern void q40ide_init(void);
1823 #endif /* CONFIG_BLK_DEV_Q40IDE */
1824 #ifdef CONFIG_BLK_DEV_BUDDHA
1826 extern void buddha_init(void);
1829 #endif /* CONFIG_BLK_DEV_BUDDHA */
1830 #ifdef CONFIG_BLK_DEV_IDEPNP
1838 void ide_register_subdriver(ide_drive_t
*drive
, ide_driver_t
*driver
)
1840 #ifdef CONFIG_PROC_FS
1841 ide_add_proc_entries(drive
->proc
, driver
->proc
, drive
);
1845 EXPORT_SYMBOL(ide_register_subdriver
);
1848 * ide_unregister_subdriver - disconnect drive from driver
1849 * @drive: drive to unplug
1852 * Disconnect a drive from the driver it was attached to and then
1853 * clean up the various proc files and other objects attached to it.
1855 * Takes ide_setting_sem and ide_lock.
1856 * Caller must hold none of the locks.
1859 void ide_unregister_subdriver(ide_drive_t
*drive
, ide_driver_t
*driver
)
1861 unsigned long flags
;
1863 down(&ide_setting_sem
);
1864 spin_lock_irqsave(&ide_lock
, flags
);
1865 #ifdef CONFIG_PROC_FS
1866 ide_remove_proc_entries(drive
->proc
, driver
->proc
);
1868 auto_remove_settings(drive
);
1869 spin_unlock_irqrestore(&ide_lock
, flags
);
1870 up(&ide_setting_sem
);
1873 EXPORT_SYMBOL(ide_unregister_subdriver
);
1879 EXPORT_SYMBOL(ide_lock
);
1881 static int ide_bus_match(struct device
*dev
, struct device_driver
*drv
)
1886 static char *media_string(ide_drive_t
*drive
)
1888 switch (drive
->media
) {
1902 static ssize_t
media_show(struct device
*dev
, struct device_attribute
*attr
, char *buf
)
1904 ide_drive_t
*drive
= to_ide_device(dev
);
1905 return sprintf(buf
, "%s\n", media_string(drive
));
1908 static ssize_t
drivename_show(struct device
*dev
, struct device_attribute
*attr
, char *buf
)
1910 ide_drive_t
*drive
= to_ide_device(dev
);
1911 return sprintf(buf
, "%s\n", drive
->name
);
1914 static ssize_t
modalias_show(struct device
*dev
, struct device_attribute
*attr
, char *buf
)
1916 ide_drive_t
*drive
= to_ide_device(dev
);
1917 return sprintf(buf
, "ide:m-%s\n", media_string(drive
));
1920 static struct device_attribute ide_dev_attrs
[] = {
1922 __ATTR_RO(drivename
),
1923 __ATTR_RO(modalias
),
1927 static int ide_uevent(struct device
*dev
, char **envp
, int num_envp
,
1928 char *buffer
, int buffer_size
)
1930 ide_drive_t
*drive
= to_ide_device(dev
);
1934 add_uevent_var(envp
, num_envp
, &i
, buffer
, buffer_size
, &length
,
1935 "MEDIA=%s", media_string(drive
));
1936 add_uevent_var(envp
, num_envp
, &i
, buffer
, buffer_size
, &length
,
1937 "DRIVENAME=%s", drive
->name
);
1938 add_uevent_var(envp
, num_envp
, &i
, buffer
, buffer_size
, &length
,
1939 "MODALIAS=ide:m-%s", media_string(drive
));
1944 static int generic_ide_probe(struct device
*dev
)
1946 ide_drive_t
*drive
= to_ide_device(dev
);
1947 ide_driver_t
*drv
= to_ide_driver(dev
->driver
);
1949 return drv
->probe
? drv
->probe(drive
) : -ENODEV
;
1952 static int generic_ide_remove(struct device
*dev
)
1954 ide_drive_t
*drive
= to_ide_device(dev
);
1955 ide_driver_t
*drv
= to_ide_driver(dev
->driver
);
1963 static void generic_ide_shutdown(struct device
*dev
)
1965 ide_drive_t
*drive
= to_ide_device(dev
);
1966 ide_driver_t
*drv
= to_ide_driver(dev
->driver
);
1968 if (dev
->driver
&& drv
->shutdown
)
1969 drv
->shutdown(drive
);
1972 struct bus_type ide_bus_type
= {
1974 .match
= ide_bus_match
,
1975 .uevent
= ide_uevent
,
1976 .probe
= generic_ide_probe
,
1977 .remove
= generic_ide_remove
,
1978 .shutdown
= generic_ide_shutdown
,
1979 .dev_attrs
= ide_dev_attrs
,
1980 .suspend
= generic_ide_suspend
,
1981 .resume
= generic_ide_resume
,
1984 EXPORT_SYMBOL_GPL(ide_bus_type
);
1987 * This is gets invoked once during initialization, to set *everything* up
1989 static int __init
ide_init(void)
1991 printk(KERN_INFO
"Uniform Multi-Platform E-IDE driver " REVISION
"\n");
1992 system_bus_speed
= ide_system_bus_speed();
1994 bus_register(&ide_bus_type
);
1998 #ifdef CONFIG_PROC_FS
1999 proc_ide_root
= proc_mkdir("ide", NULL
);
2002 #ifdef CONFIG_BLK_DEV_ALI14XX
2004 (void)ali14xx_init();
2006 #ifdef CONFIG_BLK_DEV_UMC8672
2008 (void)umc8672_init();
2010 #ifdef CONFIG_BLK_DEV_DTC2278
2012 (void)dtc2278_init();
2014 #ifdef CONFIG_BLK_DEV_HT6560B
2016 (void)ht6560b_init();
2018 #ifdef CONFIG_BLK_DEV_QD65XX
2020 (void)qd65xx_init();
2024 /* Probe for special PCI and other "known" interface chipsets. */
2028 #ifdef CONFIG_PROC_FS
2035 static char *options
= NULL
;
2036 module_param(options
, charp
, 0);
2037 MODULE_LICENSE("GPL");
2039 static void __init
parse_options (char *line
)
2043 if (line
== NULL
|| !*line
)
2045 while ((line
= next
) != NULL
) {
2046 if ((next
= strchr(line
,' ')) != NULL
)
2048 if (!ide_setup(line
))
2049 printk (KERN_INFO
"Unknown option '%s'\n", line
);
2053 int __init
init_module (void)
2055 parse_options(options
);
2059 void cleanup_module (void)
2063 for (index
= 0; index
< MAX_HWIFS
; ++index
)
2064 ide_unregister(index
);
2066 #ifdef CONFIG_PROC_FS
2070 bus_unregister(&ide_bus_type
);
2075 __setup("", ide_setup
);
2077 module_init(ide_init
);