2 * linux/drivers/block/ide.c Version 6.21 November 9, 1999
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>
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 (usually 14 & 15).
15 * There can be up to two drives per interface, as per the ATA-2 spec.
17 * Primary: ide0, port 0x1f0; major=3; hda is minor=0; hdb is minor=64
18 * Secondary: ide1, port 0x170; major=22; hdc is minor=0; hdd is minor=64
19 * Tertiary: ide2, port 0x???; major=33; hde is minor=0; hdf is minor=64
20 * Quaternary: ide3, port 0x???; major=34; hdg is minor=0; hdh is minor=64
25 * | It traverses the request-list, using interrupts to jump between functions.
26 * | As nearly all functions can be called within interrupts, we may not sleep.
27 * | Special care is recommended. Have Fun!
29 * | modified by Drew Eckhardt to check nr of hd's from the CMOS.
31 * | Thanks to Branko Lankester, lankeste@fwi.uva.nl, who found a bug
32 * | in the early extended-partition checks and added DM partitions.
34 * | Early work on error handling by Mika Liljeberg (liljeber@cs.Helsinki.FI).
36 * | IRQ-unmask, drive-id, multiple-mode, support for ">16 heads",
37 * | and general streamlining by Mark Lord (mlord@pobox.com).
39 * October, 1994 -- Complete line-by-line overhaul for linux 1.1.x, by:
41 * Mark Lord (mlord@pobox.com) (IDE Perf.Pkg)
42 * Delman Lee (delman@ieee.org) ("Mr. atdisk2")
43 * Scott Snyder (snyder@fnald0.fnal.gov) (ATAPI IDE cd-rom)
45 * This was a rewrite of just about everything from hd.c, though some original
46 * code is still sprinkled about. Think of it as a major evolution, with
47 * inspiration from lots of linux users, esp. hamish@zot.apana.org.au
49 * Version 1.0 ALPHA initial code, primary i/f working okay
50 * Version 1.3 BETA dual i/f on shared irq tested & working!
51 * Version 1.4 BETA added auto probing for irq(s)
52 * Version 1.5 BETA added ALPHA (untested) support for IDE cd-roms,
54 * Version 5.50 allow values as small as 20 for idebus=
55 * Version 5.51 force non io_32bit in drive_cmd_intr()
56 * change delay_10ms() to delay_50ms() to fix problems
57 * Version 5.52 fix incorrect invalidation of removable devices
58 * add "hdx=slow" command line option
59 * Version 5.60 start to modularize the driver; the disk and ATAPI
60 * drivers can be compiled as loadable modules.
61 * move IDE probe code to ide-probe.c
62 * move IDE disk code to ide-disk.c
63 * add support for generic IDE device subdrivers
64 * add m68k code from Geert Uytterhoeven
65 * probe all interfaces by default
66 * add ioctl to (re)probe an interface
67 * Version 6.00 use per device request queues
68 * attempt to optimize shared hwgroup performance
69 * add ioctl to manually adjust bandwidth algorithms
70 * add kerneld support for the probe module
71 * fix bug in ide_error()
72 * fix bug in the first ide_get_lock() call for Atari
73 * don't flush leftover data for ATAPI devices
74 * Version 6.01 clear hwgroup->active while the hwgroup sleeps
75 * support HDIO_GETGEO for floppies
76 * Version 6.02 fix ide_ack_intr() call
77 * check partition table on floppies
78 * Version 6.03 handle bad status bit sequencing in ide_wait_stat()
79 * Version 6.10 deleted old entries from this list of updates
80 * replaced triton.c with ide-dma.c generic PCI DMA
81 * added support for BIOS-enabled UltraDMA
82 * rename all "promise" things to "pdc4030"
83 * fix EZ-DRIVE handling on small disks
84 * Version 6.11 fix probe error in ide_scan_devices()
85 * fix ancient "jiffies" polling bugs
86 * mask all hwgroup interrupts on each irq entry
87 * Version 6.12 integrate ioctl and proc interfaces
88 * fix parsing of "idex=" command line parameter
89 * Version 6.13 add support for ide4/ide5 courtesy rjones@orchestream.com
90 * Version 6.14 fixed IRQ sharing among PCI devices
91 * Version 6.15 added SMP awareness to IDE drivers
92 * Version 6.16 fixed various bugs; even more SMP friendly
93 * Version 6.17 fix for newest EZ-Drive problem
94 * Version 6.18 default unpartitioned-disk translation now "BIOS LBA"
95 * Version 6.19 Re-design for a UNIFORM driver for all platforms,
96 * model based on suggestions from Russell King and
98 * Promise DC4030VL now supported.
99 * add support for ide6/ide7
100 * delay_50ms() changed to ide_delay_50ms() and exported.
101 * Version 6.20 Added/Fixed Generic ATA-66 support and hwif detection.
102 * Added hdx=flash to allow for second flash disk
103 * detection w/o the hang loop.
104 * Added support for ide8/ide9
105 * Added idex=ata66 for the quirky chipsets that are
106 * ATA-66 compliant, but have yet to determine a method
107 * of verification of the 80c cable presence.
108 * Specifically Promise's PDC20262 chipset.
109 * Version 6.21 Fixing/Fixed SMP spinlock issue with insight from an old
110 * hat that clarified original low level driver design.
112 * Some additional driver compile-time options are in ./include/linux/ide.h
114 * To do, in likely order of completion:
115 * - modify kernel to obtain BIOS geometry for drives on 2nd/3rd/4th i/f
119 #define REVISION "Revision: 6.21"
120 #define VERSION "Id: ide.c 6.21 1999/11/10"
122 #undef REALLY_SLOW_IO /* most systems can safely undef this */
124 #define _IDE_C /* Tell ide.h it's really us */
126 #include <linux/config.h>
127 #include <linux/module.h>
128 #include <linux/types.h>
129 #include <linux/string.h>
130 #include <linux/kernel.h>
131 #include <linux/timer.h>
132 #include <linux/mm.h>
133 #include <linux/interrupt.h>
134 #include <linux/major.h>
135 #include <linux/errno.h>
136 #include <linux/genhd.h>
137 #include <linux/blkpg.h>
138 #include <linux/malloc.h>
140 #include <linux/init.h>
142 #include <linux/pci.h>
143 #include <linux/delay.h>
144 #include <linux/ide.h>
146 #include <asm/byteorder.h>
148 #include <asm/uaccess.h>
150 #include <asm/bitops.h>
152 #include "ide_modes.h"
155 #include <linux/kmod.h>
156 #endif /* CONFIG_KMOD */
158 #ifdef CONFIG_BLK_DEV_VIA82CXXX
159 extern byte fifoconfig
; /* defined in via82cxxx.c used by ide_setup() */
160 #endif /* CONFIG_BLK_DEV_VIA82CXXX */
162 static const byte ide_hwif_to_major
[] = { IDE0_MAJOR
, IDE1_MAJOR
,
163 IDE2_MAJOR
, IDE3_MAJOR
,
164 IDE4_MAJOR
, IDE5_MAJOR
,
165 IDE6_MAJOR
, IDE7_MAJOR
,
166 IDE8_MAJOR
, IDE9_MAJOR
};
168 static int idebus_parameter
; /* holds the "idebus=" parameter */
169 static int system_bus_speed
; /* holds what we think is VESA/PCI bus speed */
170 static int initializing
; /* set while initializing built-in drivers */
172 #if defined(__mc68000__) || defined(CONFIG_APUS)
174 * ide_lock is used by the Atari code to obtain access to the IDE interrupt,
175 * which is shared between several drivers.
177 static int ide_lock
= 0;
178 #endif /* __mc68000__ || CONFIG_APUS */
181 * ide_modules keeps track of the available IDE chipset/probe/driver modules.
183 ide_module_t
*ide_modules
= NULL
;
186 * This is declared extern in ide.h, for access by other IDE modules:
188 ide_hwif_t ide_hwifs
[MAX_HWIFS
]; /* master data repository */
190 #if (DISK_RECOVERY_TIME > 0)
192 * For really screwy hardware (hey, at least it *can* be used with Linux)
193 * we can enforce a minimum delay time between successive operations.
195 static unsigned long read_timer (void)
197 unsigned long t
, flags
;
200 __save_flags(flags
); /* local CPU only */
201 __cli(); /* local CPU only */
206 __restore_flags(flags
); /* local CPU only */
209 #endif /* DISK_RECOVERY_TIME */
211 static inline void set_recovery_timer (ide_hwif_t
*hwif
)
213 #if (DISK_RECOVERY_TIME > 0)
214 hwif
->last_time
= read_timer();
215 #endif /* DISK_RECOVERY_TIME */
219 * Do not even *think* about calling this!
221 static void init_hwif_data (unsigned int index
)
225 ide_hwif_t
*hwif
= &ide_hwifs
[index
];
227 /* bulk initialize hwif & drive info with zeros */
228 memset(hwif
, 0, sizeof(ide_hwif_t
));
229 memset(&hw
, 0, sizeof(hw_regs_t
));
231 /* fill in any non-zero initial values */
233 ide_init_hwif_ports(&hw
, ide_default_io_base(index
), 0, &hwif
->irq
);
234 memcpy(&hwif
->hw
, &hw
, sizeof(hw
));
235 memcpy(hwif
->io_ports
, hw
.io_ports
, sizeof(hw
.io_ports
));
236 hwif
->noprobe
= !hwif
->io_ports
[IDE_DATA_OFFSET
];
237 #ifdef CONFIG_BLK_DEV_HD
238 if (hwif
->io_ports
[IDE_DATA_OFFSET
] == HD_DATA
)
239 hwif
->noprobe
= 1; /* may be overridden by ide_setup() */
240 #endif /* CONFIG_BLK_DEV_HD */
241 hwif
->major
= ide_hwif_to_major
[index
];
245 hwif
->name
[3] = '0' + index
;
246 for (unit
= 0; unit
< MAX_DRIVES
; ++unit
) {
247 ide_drive_t
*drive
= &hwif
->drives
[unit
];
249 drive
->media
= ide_disk
;
250 drive
->select
.all
= (unit
<<4)|0xa0;
253 drive
->ready_stat
= READY_STAT
;
254 drive
->bad_wstat
= BAD_W_STAT
;
255 drive
->special
.b
.recalibrate
= 1;
256 drive
->special
.b
.set_geometry
= 1;
257 drive
->name
[0] = 'h';
258 drive
->name
[1] = 'd';
259 drive
->name
[2] = 'a' + (index
* MAX_DRIVES
) + unit
;
260 init_waitqueue_head(&drive
->wqueue
);
265 * init_ide_data() sets reasonable default values into all fields
266 * of all instances of the hwifs and drives, but only on the first call.
267 * Subsequent calls have no effect (they don't wipe out anything).
269 * This routine is normally called at driver initialization time,
270 * but may also be called MUCH earlier during kernel "command-line"
271 * parameter processing. As such, we cannot depend on any other parts
272 * of the kernel (such as memory allocation) to be functioning yet.
274 * This is too bad, as otherwise we could dynamically allocate the
275 * ide_drive_t structs as needed, rather than always consuming memory
276 * for the max possible number (MAX_HWIFS * MAX_DRIVES) of them.
278 #define MAGIC_COOKIE 0x12345678
279 static void init_ide_data (void)
282 static unsigned long magic_cookie
= MAGIC_COOKIE
;
284 if (magic_cookie
!= MAGIC_COOKIE
)
285 return; /* already initialized */
288 /* Initialise all interface structures */
289 for (index
= 0; index
< MAX_HWIFS
; ++index
)
290 init_hwif_data(index
);
292 /* Add default hw interfaces */
293 ide_init_default_hwifs();
295 idebus_parameter
= 0;
296 system_bus_speed
= 0;
300 * CompactFlash cards and their brethern pretend to be removable hard disks, except:
301 * (1) they never have a slave unit, and
302 * (2) they don't have doorlock mechanisms.
303 * This test catches them, and is invoked elsewhere when setting appropriate config bits.
305 * FIXME: This treatment is probably applicable for *all* PCMCIA (PC CARD) devices,
306 * so in linux 2.3.x we should change this to just treat all PCMCIA drives this way,
307 * and get rid of the model-name tests below (too big of an interface change for 2.2.x).
308 * At that time, we might also consider parameterizing the timeouts and retries,
309 * since these are MUCH faster than mechanical drives. -M.Lord
311 int drive_is_flashcard (ide_drive_t
*drive
)
313 struct hd_driveid
*id
= drive
->id
;
315 if (drive
->removable
&& id
!= NULL
) {
316 if (id
->config
== 0x848a) return 1; /* CompactFlash */
317 if (!strncmp(id
->model
, "KODAK ATA_FLASH", 15) /* Kodak */
318 || !strncmp(id
->model
, "Hitachi CV", 10) /* Hitachi */
319 || !strncmp(id
->model
, "SunDisk SDCFB", 13) /* SunDisk */
320 || !strncmp(id
->model
, "HAGIWARA HPC", 12) /* Hagiwara */
321 || !strncmp(id
->model
, "ATA_FLASH", 9)) /* Simple Tech */
323 return 1; /* yes, it is a flash memory card */
326 return 0; /* no, it is not a flash memory card */
330 * ide_system_bus_speed() returns what we think is the system VESA/PCI
331 * bus speed (in MHz). This is used for calculating interface PIO timings.
332 * The default is 40 for known PCI systems, 50 otherwise.
333 * The "idebus=xx" parameter can be used to override this value.
334 * The actual value to be used is computed/displayed the first time through.
336 int ide_system_bus_speed (void)
338 if (!system_bus_speed
) {
339 if (idebus_parameter
)
340 system_bus_speed
= idebus_parameter
; /* user supplied value */
342 else if (pci_present())
343 system_bus_speed
= 40; /* safe default value for PCI */
344 #endif /* CONFIG_PCI */
346 system_bus_speed
= 50; /* safe default value for VESA and PCI */
347 printk("ide: Assuming %dMHz system bus speed for PIO modes%s\n", system_bus_speed
,
348 idebus_parameter
? "" : "; override with idebus=xx");
350 return system_bus_speed
;
355 * Some localbus EIDE interfaces require a special access sequence
356 * when using 32-bit I/O instructions to transfer data. We call this
357 * the "vlb_sync" sequence, which consists of three successive reads
358 * of the sector count register location, with interrupts disabled
359 * to ensure that the reads all happen together.
361 static inline void do_vlb_sync (ide_ioreg_t port
) {
366 #endif /* SUPPORT_VLB_SYNC */
369 * This is used for most PIO data transfers *from* the IDE interface
371 void ide_input_data (ide_drive_t
*drive
, void *buffer
, unsigned int wcount
)
373 byte io_32bit
= drive
->io_32bit
;
379 __save_flags(flags
); /* local CPU only */
380 __cli(); /* local CPU only */
381 do_vlb_sync(IDE_NSECTOR_REG
);
382 insl(IDE_DATA_REG
, buffer
, wcount
);
383 __restore_flags(flags
); /* local CPU only */
385 #endif /* SUPPORT_VLB_SYNC */
386 insl(IDE_DATA_REG
, buffer
, wcount
);
388 #if SUPPORT_SLOW_DATA_PORTS
390 unsigned short *ptr
= (unsigned short *) buffer
;
392 *ptr
++ = inw_p(IDE_DATA_REG
);
393 *ptr
++ = inw_p(IDE_DATA_REG
);
396 #endif /* SUPPORT_SLOW_DATA_PORTS */
397 insw(IDE_DATA_REG
, buffer
, wcount
<<1);
402 * This is used for most PIO data transfers *to* the IDE interface
404 void ide_output_data (ide_drive_t
*drive
, void *buffer
, unsigned int wcount
)
406 byte io_32bit
= drive
->io_32bit
;
412 __save_flags(flags
); /* local CPU only */
413 __cli(); /* local CPU only */
414 do_vlb_sync(IDE_NSECTOR_REG
);
415 outsl(IDE_DATA_REG
, buffer
, wcount
);
416 __restore_flags(flags
); /* local CPU only */
418 #endif /* SUPPORT_VLB_SYNC */
419 outsl(IDE_DATA_REG
, buffer
, wcount
);
421 #if SUPPORT_SLOW_DATA_PORTS
423 unsigned short *ptr
= (unsigned short *) buffer
;
425 outw_p(*ptr
++, IDE_DATA_REG
);
426 outw_p(*ptr
++, IDE_DATA_REG
);
429 #endif /* SUPPORT_SLOW_DATA_PORTS */
430 outsw(IDE_DATA_REG
, buffer
, wcount
<<1);
435 * The following routines are mainly used by the ATAPI drivers.
437 * These routines will round up any request for an odd number of bytes,
438 * so if an odd bytecount is specified, be sure that there's at least one
439 * extra byte allocated for the buffer.
441 void atapi_input_bytes (ide_drive_t
*drive
, void *buffer
, unsigned int bytecount
)
444 #if defined(CONFIG_ATARI) || defined(CONFIG_Q40)
445 if (MACH_IS_ATARI
|| MACH_IS_Q40
) {
446 /* Atari has a byte-swapped IDE interface */
447 insw_swapw(IDE_DATA_REG
, buffer
, bytecount
/ 2);
450 #endif /* CONFIG_ATARI */
451 ide_input_data (drive
, buffer
, bytecount
/ 4);
452 if ((bytecount
& 0x03) >= 2)
453 insw (IDE_DATA_REG
, ((byte
*)buffer
) + (bytecount
& ~0x03), 1);
456 void atapi_output_bytes (ide_drive_t
*drive
, void *buffer
, unsigned int bytecount
)
459 #if defined(CONFIG_ATARI) || defined(CONFIG_Q40)
460 if (MACH_IS_ATARI
|| MACH_IS_Q40
) {
461 /* Atari has a byte-swapped IDE interface */
462 outsw_swapw(IDE_DATA_REG
, buffer
, bytecount
/ 2);
465 #endif /* CONFIG_ATARI */
466 ide_output_data (drive
, buffer
, bytecount
/ 4);
467 if ((bytecount
& 0x03) >= 2)
468 outsw (IDE_DATA_REG
, ((byte
*)buffer
) + (bytecount
& ~0x03), 1);
472 * Needed for PCI irq sharing
474 static inline int drive_is_ready (ide_drive_t
*drive
)
476 if (drive
->waiting_for_dma
)
477 return HWIF(drive
)->dmaproc(ide_dma_test_irq
, drive
);
479 udelay(1); /* need to guarantee 400ns since last command was issued */
481 if (GET_STAT() & BUSY_STAT
) /* Note: this may clear a pending IRQ!! */
482 return 0; /* drive busy: definitely not interrupting */
483 return 1; /* drive ready: *might* be interrupting */
487 * This is our end_request replacement function.
489 void ide_end_request (byte uptodate
, ide_hwgroup_t
*hwgroup
)
494 spin_lock_irqsave(&io_request_lock
, flags
);
497 if (!end_that_request_first(rq
, uptodate
, hwgroup
->drive
->name
)) {
498 add_blkdev_randomness(MAJOR(rq
->rq_dev
));
499 hwgroup
->drive
->queue
.current_request
= rq
->next
;
500 blk_dev
[MAJOR(rq
->rq_dev
)].request_queue
.current_request
= NULL
;
502 end_that_request_last(rq
);
504 spin_unlock_irqrestore(&io_request_lock
, flags
);
508 * This should get invoked any time we exit the driver to
509 * wait for an interrupt response from a drive. handler() points
510 * at the appropriate code to handle the next interrupt, and a
511 * timer is started to prevent us from waiting forever in case
512 * something goes wrong (see the ide_timer_expiry() handler later on).
514 void ide_set_handler (ide_drive_t
*drive
, ide_handler_t
*handler
,
515 unsigned int timeout
, ide_expiry_t
*expiry
)
518 ide_hwgroup_t
*hwgroup
= HWGROUP(drive
);
520 spin_lock_irqsave(&io_request_lock
, flags
);
521 if (hwgroup
->handler
!= NULL
) {
522 printk("%s: ide_set_handler: handler not null; old=%p, new=%p\n",
523 drive
->name
, hwgroup
->handler
, handler
);
525 hwgroup
->handler
= handler
;
526 hwgroup
->expiry
= expiry
;
527 hwgroup
->timer
.expires
= jiffies
+ timeout
;
528 add_timer(&hwgroup
->timer
);
529 spin_unlock_irqrestore(&io_request_lock
, flags
);
533 * current_capacity() returns the capacity (in sectors) of a drive
534 * according to its current geometry/LBA settings.
536 unsigned long current_capacity (ide_drive_t
*drive
)
540 if (drive
->driver
!= NULL
)
541 return DRIVER(drive
)->capacity(drive
);
546 * ide_geninit() is called exactly *once* for each major, from genhd.c,
547 * at the beginning of the initial partition check for the drives.
549 void ide_geninit (struct gendisk
*gd
)
552 ide_hwif_t
*hwif
= gd
->real_devices
;
554 for (unit
= 0; unit
< gd
->nr_real
; ++unit
) {
555 ide_drive_t
*drive
= &hwif
->drives
[unit
];
557 drive
->part
[0].nr_sects
= current_capacity(drive
);
558 if (!drive
->present
|| (drive
->media
!= ide_disk
&& drive
->media
!= ide_floppy
) ||
559 drive
->driver
== NULL
|| !drive
->part
[0].nr_sects
)
560 drive
->part
[0].start_sect
= -1; /* skip partition check */
564 static ide_startstop_t
do_reset1 (ide_drive_t
*, int); /* needed below */
567 * atapi_reset_pollfunc() gets invoked to poll the interface for completion every 50ms
568 * during an atapi drive reset operation. If the drive has not yet responded,
569 * and we have not yet hit our maximum waiting time, then the timer is restarted
572 static ide_startstop_t
atapi_reset_pollfunc (ide_drive_t
*drive
)
574 ide_hwgroup_t
*hwgroup
= HWGROUP(drive
);
577 SELECT_DRIVE(HWIF(drive
),drive
);
580 if (OK_STAT(stat
=GET_STAT(), 0, BUSY_STAT
)) {
581 printk("%s: ATAPI reset complete\n", drive
->name
);
583 if (0 < (signed long)(hwgroup
->poll_timeout
- jiffies
)) {
584 ide_set_handler (drive
, &atapi_reset_pollfunc
, HZ
/20, NULL
);
585 return ide_started
; /* continue polling */
587 hwgroup
->poll_timeout
= 0; /* end of polling */
588 printk("%s: ATAPI reset timed-out, status=0x%02x\n", drive
->name
, stat
);
589 return do_reset1 (drive
, 1); /* do it the old fashioned way */
591 hwgroup
->poll_timeout
= 0; /* done polling */
596 * reset_pollfunc() gets invoked to poll the interface for completion every 50ms
597 * during an ide reset operation. If the drives have not yet responded,
598 * and we have not yet hit our maximum waiting time, then the timer is restarted
601 static ide_startstop_t
reset_pollfunc (ide_drive_t
*drive
)
603 ide_hwgroup_t
*hwgroup
= HWGROUP(drive
);
604 ide_hwif_t
*hwif
= HWIF(drive
);
607 if (!OK_STAT(tmp
=GET_STAT(), 0, BUSY_STAT
)) {
608 if (0 < (signed long)(hwgroup
->poll_timeout
- jiffies
)) {
609 ide_set_handler (drive
, &reset_pollfunc
, HZ
/20, NULL
);
610 return ide_started
; /* continue polling */
612 printk("%s: reset timed-out, status=0x%02x\n", hwif
->name
, tmp
);
614 printk("%s: reset: ", hwif
->name
);
615 if ((tmp
= GET_ERR()) == 1)
618 #if FANCY_STATUS_DUMPS
620 switch (tmp
& 0x7f) {
621 case 1: printk("passed");
623 case 2: printk("formatter device error");
625 case 3: printk("sector buffer error");
627 case 4: printk("ECC circuitry error");
629 case 5: printk("controlling MPU error");
631 default:printk("error (0x%02x?)", tmp
);
634 printk("; slave: failed");
638 #endif /* FANCY_STATUS_DUMPS */
641 hwgroup
->poll_timeout
= 0; /* done polling */
645 static void pre_reset (ide_drive_t
*drive
)
647 if (!drive
->keep_settings
) {
650 if (drive
->using_dma
)
651 (void) HWIF(drive
)->dmaproc(ide_dma_off
, drive
);
653 if (drive
->driver
!= NULL
)
654 DRIVER(drive
)->pre_reset(drive
);
658 * do_reset1() attempts to recover a confused drive by resetting it.
659 * Unfortunately, resetting a disk drive actually resets all devices on
660 * the same interface, so it can really be thought of as resetting the
661 * interface rather than resetting the drive.
663 * ATAPI devices have their own reset mechanism which allows them to be
664 * individually reset without clobbering other devices on the same interface.
666 * Unfortunately, the IDE interface does not generate an interrupt to let
667 * us know when the reset operation has finished, so we must poll for this.
668 * Equally poor, though, is the fact that this may a very long time to complete,
669 * (up to 30 seconds worstcase). So, instead of busy-waiting here for it,
670 * we set a timer to poll at 50ms intervals.
672 static ide_startstop_t
do_reset1 (ide_drive_t
*drive
, int do_not_try_atapi
)
676 ide_hwif_t
*hwif
= HWIF(drive
);
677 ide_hwgroup_t
*hwgroup
= HWGROUP(drive
);
679 __save_flags(flags
); /* local CPU only */
680 __cli(); /* local CPU only */
682 /* For an ATAPI device, first try an ATAPI SRST. */
683 if (drive
->media
!= ide_disk
&& !do_not_try_atapi
) {
685 SELECT_DRIVE(hwif
,drive
);
687 OUT_BYTE (WIN_SRST
, IDE_COMMAND_REG
);
688 hwgroup
->poll_timeout
= jiffies
+ WAIT_WORSTCASE
;
689 ide_set_handler (drive
, &atapi_reset_pollfunc
, HZ
/20, NULL
);
690 __restore_flags (flags
); /* local CPU only */
695 * First, reset any device state data we were maintaining
696 * for any of the drives on this interface.
698 for (unit
= 0; unit
< MAX_DRIVES
; ++unit
)
699 pre_reset(&hwif
->drives
[unit
]);
701 #if OK_TO_RESET_CONTROLLER
702 if (!IDE_CONTROL_REG
) {
703 __restore_flags(flags
);
707 * Note that we also set nIEN while resetting the device,
708 * to mask unwanted interrupts from the interface during the reset.
709 * However, due to the design of PC hardware, this will cause an
710 * immediate interrupt due to the edge transition it produces.
711 * This single interrupt gives us a "fast poll" for drives that
712 * recover from reset very quickly, saving us the first 50ms wait time.
714 OUT_BYTE(drive
->ctl
|6,IDE_CONTROL_REG
); /* set SRST and nIEN */
715 udelay(10); /* more than enough time */
716 OUT_BYTE(drive
->ctl
|2,IDE_CONTROL_REG
); /* clear SRST, leave nIEN */
717 udelay(10); /* more than enough time */
718 hwgroup
->poll_timeout
= jiffies
+ WAIT_WORSTCASE
;
719 ide_set_handler (drive
, &reset_pollfunc
, HZ
/20, NULL
);
722 * Some weird controller like resetting themselves to a strange
723 * state when the disks are reset this way. At least, the Winbond
724 * 553 documentation says that
726 if (hwif
->resetproc
!= NULL
)
727 hwif
->resetproc(drive
);
729 #endif /* OK_TO_RESET_CONTROLLER */
731 __restore_flags (flags
); /* local CPU only */
736 * ide_do_reset() is the entry point to the drive/interface reset code.
738 ide_startstop_t
ide_do_reset (ide_drive_t
*drive
)
740 return do_reset1 (drive
, 0);
744 * Clean up after success/failure of an explicit drive cmd
746 void ide_end_drive_cmd (ide_drive_t
*drive
, byte stat
, byte err
)
749 struct request
*rq
= HWGROUP(drive
)->rq
;
751 if (rq
->cmd
== IDE_DRIVE_CMD
) {
752 byte
*args
= (byte
*) rq
->buffer
;
753 rq
->errors
= !OK_STAT(stat
,READY_STAT
,BAD_STAT
);
757 args
[2] = IN_BYTE(IDE_NSECTOR_REG
);
760 spin_lock_irqsave(&io_request_lock
, flags
);
761 drive
->queue
.current_request
= rq
->next
;
762 blk_dev
[MAJOR(rq
->rq_dev
)].request_queue
.current_request
= NULL
;
763 HWGROUP(drive
)->rq
= NULL
;
764 rq
->rq_status
= RQ_INACTIVE
;
765 spin_unlock_irqrestore(&io_request_lock
, flags
);
767 up(rq
->sem
); /* inform originator that rq has been serviced */
771 * Error reporting, in human readable form (luxurious, but a memory hog).
773 byte
ide_dump_status (ide_drive_t
*drive
, const char *msg
, byte stat
)
778 __save_flags (flags
); /* local CPU only */
779 ide__sti(); /* local CPU only */
780 printk("%s: %s: status=0x%02x", drive
->name
, msg
, stat
);
781 #if FANCY_STATUS_DUMPS
783 if (stat
& BUSY_STAT
)
786 if (stat
& READY_STAT
) printk("DriveReady ");
787 if (stat
& WRERR_STAT
) printk("DeviceFault ");
788 if (stat
& SEEK_STAT
) printk("SeekComplete ");
789 if (stat
& DRQ_STAT
) printk("DataRequest ");
790 if (stat
& ECC_STAT
) printk("CorrectedError ");
791 if (stat
& INDEX_STAT
) printk("Index ");
792 if (stat
& ERR_STAT
) printk("Error ");
795 #endif /* FANCY_STATUS_DUMPS */
797 if ((stat
& (BUSY_STAT
|ERR_STAT
)) == ERR_STAT
) {
799 printk("%s: %s: error=0x%02x", drive
->name
, msg
, err
);
800 #if FANCY_STATUS_DUMPS
801 if (drive
->media
== ide_disk
) {
803 if (err
& ABRT_ERR
) printk("DriveStatusError ");
804 if (err
& ICRC_ERR
) printk((err
& ABRT_ERR
) ? "BadCRC " : "BadSector ");
805 if (err
& ECC_ERR
) printk("UncorrectableError ");
806 if (err
& ID_ERR
) printk("SectorIdNotFound ");
807 if (err
& TRK0_ERR
) printk("TrackZeroNotFound ");
808 if (err
& MARK_ERR
) printk("AddrMarkNotFound ");
810 if ((err
& (BBD_ERR
| ABRT_ERR
)) == BBD_ERR
|| (err
& (ECC_ERR
|ID_ERR
|MARK_ERR
))) {
811 byte cur
= IN_BYTE(IDE_SELECT_REG
);
812 if (cur
& 0x40) { /* using LBA? */
813 printk(", LBAsect=%ld", (unsigned long)
815 |(IN_BYTE(IDE_HCYL_REG
)<<16)
816 |(IN_BYTE(IDE_LCYL_REG
)<<8)
817 | IN_BYTE(IDE_SECTOR_REG
));
819 printk(", CHS=%d/%d/%d",
820 (IN_BYTE(IDE_HCYL_REG
)<<8) +
821 IN_BYTE(IDE_LCYL_REG
),
823 IN_BYTE(IDE_SECTOR_REG
));
825 if (HWGROUP(drive
)->rq
)
826 printk(", sector=%ld", HWGROUP(drive
)->rq
->sector
);
829 #endif /* FANCY_STATUS_DUMPS */
832 __restore_flags (flags
); /* local CPU only */
837 * try_to_flush_leftover_data() is invoked in response to a drive
838 * unexpectedly having its DRQ_STAT bit set. As an alternative to
839 * resetting the drive, this routine tries to clear the condition
840 * by read a sector's worth of data from the drive. Of course,
841 * this may not help if the drive is *waiting* for data from *us*.
843 static void try_to_flush_leftover_data (ide_drive_t
*drive
)
845 int i
= (drive
->mult_count
? drive
->mult_count
: 1) * SECTOR_WORDS
;
847 if (drive
->media
!= ide_disk
)
850 unsigned long buffer
[16];
851 unsigned int wcount
= (i
> 16) ? 16 : i
;
853 ide_input_data (drive
, buffer
, wcount
);
858 * ide_error() takes action based on the error returned by the drive.
860 ide_startstop_t
ide_error (ide_drive_t
*drive
, const char *msg
, byte stat
)
865 err
= ide_dump_status(drive
, msg
, stat
);
866 if (drive
== NULL
|| (rq
= HWGROUP(drive
)->rq
) == NULL
)
868 /* retry only "normal" I/O: */
869 if (rq
->cmd
== IDE_DRIVE_CMD
) {
871 ide_end_drive_cmd(drive
, stat
, err
);
874 if (stat
& BUSY_STAT
|| ((stat
& WRERR_STAT
) && !drive
->nowerr
)) { /* other bits are useless when BUSY */
875 rq
->errors
|= ERROR_RESET
;
877 if (drive
->media
== ide_disk
&& (stat
& ERR_STAT
)) {
878 /* err has different meaning on cdrom and tape */
879 if (err
== ABRT_ERR
) {
880 if (drive
->select
.b
.lba
&& IN_BYTE(IDE_COMMAND_REG
) == WIN_SPECIFY
)
881 return ide_stopped
; /* some newer drives don't support WIN_SPECIFY */
882 } else if ((err
& (ABRT_ERR
| ICRC_ERR
)) == (ABRT_ERR
| ICRC_ERR
))
883 ; /* UDMA crc error -- just retry the operation */
884 else if (err
& (BBD_ERR
| ECC_ERR
)) /* retries won't help these */
885 rq
->errors
= ERROR_MAX
;
886 else if (err
& TRK0_ERR
) /* help it find track zero */
887 rq
->errors
|= ERROR_RECAL
;
889 if ((stat
& DRQ_STAT
) && rq
->cmd
!= WRITE
)
890 try_to_flush_leftover_data(drive
);
892 if (GET_STAT() & (BUSY_STAT
|DRQ_STAT
))
893 rq
->errors
|= ERROR_RESET
; /* Mmmm.. timing problem */
895 if (rq
->errors
>= ERROR_MAX
) {
896 if (drive
->driver
!= NULL
)
897 DRIVER(drive
)->end_request(0, HWGROUP(drive
));
899 ide_end_request(0, HWGROUP(drive
));
901 if ((rq
->errors
& ERROR_RESET
) == ERROR_RESET
) {
903 return ide_do_reset(drive
);
905 if ((rq
->errors
& ERROR_RECAL
) == ERROR_RECAL
)
906 drive
->special
.b
.recalibrate
= 1;
913 * Issue a simple drive command
914 * The drive must be selected beforehand.
916 void ide_cmd (ide_drive_t
*drive
, byte cmd
, byte nsect
, ide_handler_t
*handler
)
918 ide_set_handler (drive
, handler
, WAIT_CMD
, NULL
);
920 OUT_BYTE(drive
->ctl
,IDE_CONTROL_REG
); /* clear nIEN */
921 OUT_BYTE(nsect
,IDE_NSECTOR_REG
);
922 OUT_BYTE(cmd
,IDE_COMMAND_REG
);
926 * drive_cmd_intr() is invoked on completion of a special DRIVE_CMD.
928 static ide_startstop_t
drive_cmd_intr (ide_drive_t
*drive
)
930 struct request
*rq
= HWGROUP(drive
)->rq
;
931 byte
*args
= (byte
*) rq
->buffer
;
932 byte stat
= GET_STAT();
935 ide__sti(); /* local CPU only */
936 if ((stat
& DRQ_STAT
) && args
&& args
[3]) {
937 byte io_32bit
= drive
->io_32bit
;
939 ide_input_data(drive
, &args
[4], args
[3] * SECTOR_WORDS
);
940 drive
->io_32bit
= io_32bit
;
941 while (((stat
= GET_STAT()) & BUSY_STAT
) && retries
--)
945 if (!OK_STAT(stat
, READY_STAT
, BAD_STAT
))
946 return ide_error(drive
, "drive_cmd", stat
); /* calls ide_end_drive_cmd */
947 ide_end_drive_cmd (drive
, stat
, GET_ERR());
952 * do_special() is used to issue WIN_SPECIFY, WIN_RESTORE, and WIN_SETMULT
953 * commands to a drive. It used to do much more, but has been scaled back.
955 static ide_startstop_t
do_special (ide_drive_t
*drive
)
957 special_t
*s
= &drive
->special
;
960 printk("%s: do_special: 0x%02x\n", drive
->name
, s
->all
);
963 ide_tuneproc_t
*tuneproc
= HWIF(drive
)->tuneproc
;
965 if (tuneproc
!= NULL
)
966 tuneproc(drive
, drive
->tune_req
);
967 } else if (drive
->driver
!= NULL
) {
968 return DRIVER(drive
)->special(drive
);
970 printk("%s: bad special flag: 0x%02x\n", drive
->name
, s
->all
);
977 * This routine busy-waits for the drive status to be not "busy".
978 * It then checks the status for all of the "good" bits and none
979 * of the "bad" bits, and if all is okay it returns 0. All other
980 * cases return 1 after invoking ide_error() -- caller should just return.
982 * This routine should get fixed to not hog the cpu during extra long waits..
983 * That could be done by busy-waiting for the first jiffy or two, and then
984 * setting a timer to wake up at half second intervals thereafter,
985 * until timeout is achieved, before timing out.
987 int ide_wait_stat (ide_startstop_t
*startstop
, ide_drive_t
*drive
, byte good
, byte bad
, unsigned long timeout
) {
992 udelay(1); /* spec allows drive 400ns to assert "BUSY" */
993 if ((stat
= GET_STAT()) & BUSY_STAT
) {
994 __save_flags(flags
); /* local CPU only */
995 ide__sti(); /* local CPU only */
997 while ((stat
= GET_STAT()) & BUSY_STAT
) {
998 if (0 < (signed long)(jiffies
- timeout
)) {
999 __restore_flags(flags
); /* local CPU only */
1000 *startstop
= ide_error(drive
, "status timeout", stat
);
1004 __restore_flags(flags
); /* local CPU only */
1007 * Allow status to settle, then read it again.
1008 * A few rare drives vastly violate the 400ns spec here,
1009 * so we'll wait up to 10usec for a "good" status
1010 * rather than expensively fail things immediately.
1011 * This fix courtesy of Matthew Faupel & Niccolo Rigacci.
1013 for (i
= 0; i
< 10; i
++) {
1015 if (OK_STAT((stat
= GET_STAT()), good
, bad
))
1018 *startstop
= ide_error(drive
, "status error", stat
);
1023 * execute_drive_cmd() issues a special drive command,
1024 * usually initiated by ioctl() from the external hdparm program.
1026 static ide_startstop_t
execute_drive_cmd (ide_drive_t
*drive
, struct request
*rq
)
1028 byte
*args
= rq
->buffer
;
1031 printk("%s: DRIVE_CMD cmd=0x%02x sc=0x%02x fr=0x%02x xx=0x%02x\n",
1032 drive
->name
, args
[0], args
[1], args
[2], args
[3]);
1034 if (args
[0] == WIN_SMART
) {
1035 OUT_BYTE(0x4f, IDE_LCYL_REG
);
1036 OUT_BYTE(0xc2, IDE_HCYL_REG
);
1037 OUT_BYTE(args
[2],IDE_FEATURE_REG
);
1038 OUT_BYTE(args
[1],IDE_SECTOR_REG
);
1039 ide_cmd(drive
, args
[0], args
[3], &drive_cmd_intr
);
1042 OUT_BYTE(args
[2],IDE_FEATURE_REG
);
1043 ide_cmd(drive
, args
[0], args
[1], &drive_cmd_intr
);
1047 * NULL is actually a valid way of waiting for
1048 * all current requests to be flushed from the queue.
1051 printk("%s: DRIVE_CMD (null)\n", drive
->name
);
1053 ide_end_drive_cmd(drive
, GET_STAT(), GET_ERR());
1059 * start_request() initiates handling of a new I/O request
1061 static ide_startstop_t
start_request (ide_drive_t
*drive
)
1063 ide_startstop_t startstop
;
1064 unsigned long block
, blockend
;
1065 struct request
*rq
= drive
->queue
.current_request
;
1066 unsigned int minor
= MINOR(rq
->rq_dev
), unit
= minor
>> PARTN_BITS
;
1067 ide_hwif_t
*hwif
= HWIF(drive
);
1070 printk("%s: start_request: current=0x%08lx\n", hwif
->name
, (unsigned long) rq
);
1072 if (unit
>= MAX_DRIVES
) {
1073 printk("%s: bad device number: %s\n", hwif
->name
, kdevname(rq
->rq_dev
));
1077 if (rq
->bh
&& !buffer_locked(rq
->bh
)) {
1078 printk("%s: block not locked\n", drive
->name
);
1083 blockend
= block
+ rq
->nr_sectors
;
1084 if ((blockend
< block
) || (blockend
> drive
->part
[minor
&PARTN_MASK
].nr_sects
)) {
1085 printk("%s%c: bad access: block=%ld, count=%ld\n", drive
->name
,
1086 (minor
&PARTN_MASK
)?'0'+(minor
&PARTN_MASK
):' ', block
, rq
->nr_sectors
);
1089 block
+= drive
->part
[minor
&PARTN_MASK
].start_sect
+ drive
->sect0
;
1091 /* Yecch - this will shift the entire interval,
1092 possibly killing some innocent following sector */
1093 if (block
== 0 && drive
->remap_0_to_1
== 1)
1094 block
= 1; /* redirect MBR access to EZ-Drive partn table */
1096 #if (DISK_RECOVERY_TIME > 0)
1097 while ((read_timer() - hwif
->last_time
) < DISK_RECOVERY_TIME
);
1100 SELECT_DRIVE(hwif
, drive
);
1101 if (ide_wait_stat(&startstop
, drive
, drive
->ready_stat
, BUSY_STAT
|DRQ_STAT
, WAIT_READY
)) {
1102 printk("%s: drive not ready for command\n", drive
->name
);
1105 if (!drive
->special
.all
) {
1106 if (rq
->cmd
== IDE_DRIVE_CMD
) {
1107 return execute_drive_cmd(drive
, rq
);
1109 if (drive
->driver
!= NULL
) {
1110 return (DRIVER(drive
)->do_request(drive
, rq
, block
));
1112 printk("%s: media type %d not supported\n", drive
->name
, drive
->media
);
1115 return do_special(drive
);
1117 if (drive
->driver
!= NULL
)
1118 DRIVER(drive
)->end_request(0, HWGROUP(drive
));
1120 ide_end_request(0, HWGROUP(drive
));
1125 * ide_stall_queue() can be used by a drive to give excess bandwidth back
1126 * to the hwgroup by sleeping for timeout jiffies.
1128 void ide_stall_queue (ide_drive_t
*drive
, unsigned long timeout
)
1130 if (timeout
> WAIT_WORSTCASE
)
1131 timeout
= WAIT_WORSTCASE
;
1132 drive
->sleep
= timeout
+ jiffies
;
1135 #define WAKEUP(drive) ((drive)->service_start + 2 * (drive)->service_time)
1138 * choose_drive() selects the next drive which will be serviced.
1140 static inline ide_drive_t
*choose_drive (ide_hwgroup_t
*hwgroup
)
1142 ide_drive_t
*drive
, *best
;
1146 drive
= hwgroup
->drive
;
1148 if (drive
->queue
.current_request
&& (!drive
->sleep
|| 0 <= (signed long)(jiffies
- drive
->sleep
))) {
1150 || (drive
->sleep
&& (!best
->sleep
|| 0 < (signed long)(best
->sleep
- drive
->sleep
)))
1151 || (!best
->sleep
&& 0 < (signed long)(WAKEUP(best
) - WAKEUP(drive
))))
1153 struct blk_dev_struct
*bdev
= &blk_dev
[HWIF(drive
)->major
];
1154 if( !bdev
->request_queue
.plugged
)
1158 } while ((drive
= drive
->next
) != hwgroup
->drive
);
1159 if (best
&& best
->nice1
&& !best
->sleep
&& best
!= hwgroup
->drive
&& best
->service_time
> WAIT_MIN_SLEEP
) {
1160 long t
= (signed long)(WAKEUP(best
) - jiffies
);
1161 if (t
>= WAIT_MIN_SLEEP
) {
1163 * We *may* have some time to spare, but first let's see if
1164 * someone can potentially benefit from our nice mood today..
1169 && 0 < (signed long)(WAKEUP(drive
) - (jiffies
- best
->service_time
))
1170 && 0 < (signed long)((jiffies
+ t
) - WAKEUP(drive
)))
1172 ide_stall_queue(best
, IDE_MIN(t
, 10 * WAIT_MIN_SLEEP
));
1175 } while ((drive
= drive
->next
) != best
);
1182 * Issue a new request to a drive from hwgroup
1183 * Caller must have already done spin_lock_irqsave(&io_request_lock, ..);
1185 * A hwgroup is a serialized group of IDE interfaces. Usually there is
1186 * exactly one hwif (interface) per hwgroup, but buggy controllers (eg. CMD640)
1187 * may have both interfaces in a single hwgroup to "serialize" access.
1188 * Or possibly multiple ISA interfaces can share a common IRQ by being grouped
1189 * together into one hwgroup for serialized access.
1191 * Note also that several hwgroups can end up sharing a single IRQ,
1192 * possibly along with many other devices. This is especially common in
1193 * PCI-based systems with off-board IDE controller cards.
1195 * The IDE driver uses the single global io_request_lock spinlock to protect
1196 * access to the request queues, and to protect the hwgroup->busy flag.
1198 * The first thread into the driver for a particular hwgroup sets the
1199 * hwgroup->busy flag to indicate that this hwgroup is now active,
1200 * and then initiates processing of the top request from the request queue.
1202 * Other threads attempting entry notice the busy setting, and will simply
1203 * queue their new requests and exit immediately. Note that hwgroup->busy
1204 * remains set even when the driver is merely awaiting the next interrupt.
1205 * Thus, the meaning is "this hwgroup is busy processing a request".
1207 * When processing of a request completes, the completing thread or IRQ-handler
1208 * will start the next request from the queue. If no more work remains,
1209 * the driver will clear the hwgroup->busy flag and exit.
1211 * The io_request_lock (spinlock) is used to protect all access to the
1212 * hwgroup->busy flag, but is otherwise not needed for most processing in
1213 * the driver. This makes the driver much more friendlier to shared IRQs
1214 * than previous designs, while remaining 100% (?) SMP safe and capable.
1216 static void ide_do_request (ide_hwgroup_t
*hwgroup
)
1218 struct blk_dev_struct
*bdev
;
1221 ide_startstop_t startstop
;
1223 ide_get_lock(&ide_lock
, ide_intr
, hwgroup
); /* for atari only: POSSIBLY BROKEN HERE(?) */
1225 __cli(); /* necessary paranoia: ensure IRQs are masked on local CPU */
1227 while (!hwgroup
->busy
) {
1229 drive
= choose_drive(hwgroup
);
1230 if (drive
== NULL
) {
1231 unsigned long sleep
= 0;
1233 drive
= hwgroup
->drive
;
1235 bdev
= &blk_dev
[HWIF(drive
)->major
];
1236 if( !bdev
->request_queue
.plugged
)
1237 bdev
->request_queue
.current_request
= NULL
; /* (broken since patch-2.1.15) */
1238 if (drive
->sleep
&& (!sleep
|| 0 < (signed long)(sleep
- drive
->sleep
)))
1239 sleep
= drive
->sleep
;
1240 } while ((drive
= drive
->next
) != hwgroup
->drive
);
1243 * Take a short snooze, and then wake up this hwgroup again.
1244 * This gives other hwgroups on the same a chance to
1245 * play fairly with us, just in case there are big differences
1246 * in relative throughputs.. don't want to hog the cpu too much.
1248 if (0 < (signed long)(jiffies
+ WAIT_MIN_SLEEP
- sleep
))
1249 sleep
= jiffies
+ WAIT_MIN_SLEEP
;
1251 if (hwgroup
->timer
.next
|| hwgroup
->timer
.prev
)
1252 printk("ide_set_handler: timer already active\n");
1254 hwgroup
->sleeping
= 1; /* so that ide_timer_expiry knows what to do */
1255 mod_timer(&hwgroup
->timer
, sleep
);
1256 /* we purposely leave hwgroup->busy==1 while sleeping */
1258 /* Ugly, but how can we sleep for the lock otherwise? perhaps from tq_scheduler? */
1259 ide_release_lock(&ide_lock
); /* for atari only */
1262 return; /* no more work for this hwgroup (for now) */
1265 if (hwgroup
->hwif
->sharing_irq
&& hwif
!= hwgroup
->hwif
&& hwif
->io_ports
[IDE_CONTROL_OFFSET
]) {
1266 /* set nIEN for previous hwif */
1267 OUT_BYTE(hwgroup
->drive
->ctl
|2, hwgroup
->hwif
->io_ports
[IDE_CONTROL_OFFSET
]);
1269 hwgroup
->hwif
= hwif
;
1270 hwgroup
->drive
= drive
;
1272 drive
->service_start
= jiffies
;
1274 bdev
= &blk_dev
[hwif
->major
];
1275 if( bdev
->request_queue
.plugged
) /* FIXME: paranoia */
1276 printk("%s: Huh? nuking plugged queue\n", drive
->name
);
1277 bdev
->request_queue
.current_request
= hwgroup
->rq
= drive
->queue
.current_request
;
1278 spin_unlock(&io_request_lock
);
1279 if (!hwif
->serialized
) /* play it safe with buggy hardware */
1281 startstop
= start_request(drive
);
1282 spin_lock_irq(&io_request_lock
);
1283 if (startstop
== ide_stopped
)
1289 * ide_get_queue() returns the queue which corresponds to a given device.
1291 request_queue_t
*ide_get_queue (kdev_t dev
)
1293 ide_hwif_t
*hwif
= (ide_hwif_t
*)blk_dev
[MAJOR(dev
)].data
;
1295 return &hwif
->drives
[DEVICE_NR(dev
) & 1].queue
;
1298 void do_ide0_request (request_queue_t
*q
)
1300 ide_do_request (ide_hwifs
[0].hwgroup
);
1304 void do_ide1_request (request_queue_t
*q
)
1306 ide_do_request (ide_hwifs
[1].hwgroup
);
1308 #endif /* MAX_HWIFS > 1 */
1311 void do_ide2_request (request_queue_t
*q
)
1313 ide_do_request (ide_hwifs
[2].hwgroup
);
1315 #endif /* MAX_HWIFS > 2 */
1318 void do_ide3_request (request_queue_t
*q
)
1320 ide_do_request (ide_hwifs
[3].hwgroup
);
1322 #endif /* MAX_HWIFS > 3 */
1325 void do_ide4_request (request_queue_t
*q
)
1327 ide_do_request (ide_hwifs
[4].hwgroup
);
1329 #endif /* MAX_HWIFS > 4 */
1332 void do_ide5_request (request_queue_t
*q
)
1334 ide_do_request (ide_hwifs
[5].hwgroup
);
1336 #endif /* MAX_HWIFS > 5 */
1339 void do_ide6_request (request_queue_t
*q
)
1341 ide_do_request (ide_hwifs
[6].hwgroup
);
1343 #endif /* MAX_HWIFS > 6 */
1346 void do_ide7_request (request_queue_t
*q
)
1348 ide_do_request (ide_hwifs
[7].hwgroup
);
1350 #endif /* MAX_HWIFS > 7 */
1353 void do_ide8_request (request_queue_t
*q
)
1355 ide_do_request (ide_hwifs
[8].hwgroup
);
1357 #endif /* MAX_HWIFS > 8 */
1360 void do_ide9_request (request_queue_t
*q
)
1362 ide_do_request (ide_hwifs
[9].hwgroup
);
1364 #endif /* MAX_HWIFS > 9 */
1367 * ide_timer_expiry() is our timeout function for all drive operations.
1368 * But note that it can also be invoked as a result of a "sleep" operation
1369 * triggered by the mod_timer() call in ide_do_request.
1371 void ide_timer_expiry (unsigned long data
)
1373 ide_hwgroup_t
*hwgroup
= (ide_hwgroup_t
*) data
;
1374 ide_handler_t
*handler
;
1375 ide_expiry_t
*expiry
;
1376 unsigned long flags
;
1379 spin_lock_irqsave(&io_request_lock
, flags
);
1380 del_timer(&hwgroup
->timer
);
1382 if ((handler
= hwgroup
->handler
) == NULL
) {
1384 * Either a marginal timeout occured
1385 * (got the interrupt just as timer expired),
1386 * or we were "sleeping" to give other devices a chance.
1387 * Either way, we don't really want to complain about anything.
1389 if (hwgroup
->sleeping
) {
1390 hwgroup
->sleeping
= 0;
1394 ide_drive_t
*drive
= hwgroup
->drive
;
1395 hwgroup
->handler
= NULL
;
1397 printk("ide_timer_expiry: hwgroup->drive was NULL\n");
1400 ide_startstop_t startstop
;
1401 if (!hwgroup
->busy
) {
1402 hwgroup
->busy
= 1; /* paranoia */
1403 printk("%s: ide_timer_expiry: hwgroup->busy was 0 ??\n", drive
->name
);
1405 if ((expiry
= hwgroup
->expiry
) != NULL
) {
1407 if ((wait
= expiry(drive
)) != 0) {
1409 hwgroup
->timer
.expires
= jiffies
+ wait
;
1410 add_timer(&hwgroup
->timer
);
1411 spin_unlock_irqrestore(&io_request_lock
, flags
);
1416 * We need to simulate a real interrupt when invoking
1417 * the handler() function, which means we need to globally
1418 * mask the specific IRQ:
1420 spin_unlock(&io_request_lock
);
1422 disable_irq(hwif
->irq
);
1423 __cli(); /* local CPU only, as if we were handling an interrupt */
1424 if (hwgroup
->poll_timeout
!= 0) {
1425 startstop
= handler(drive
);
1426 } else if (drive_is_ready(drive
)) {
1427 if (drive
->waiting_for_dma
)
1428 (void) hwgroup
->hwif
->dmaproc(ide_dma_lostirq
, drive
);
1429 (void)ide_ack_intr(hwif
);
1430 printk("%s: lost interrupt\n", drive
->name
);
1431 startstop
= handler(drive
);
1433 if (drive
->waiting_for_dma
) {
1434 (void) hwgroup
->hwif
->dmaproc(ide_dma_end
, drive
);
1435 printk("%s: timeout waiting for DMA\n", drive
->name
);
1436 (void) hwgroup
->hwif
->dmaproc(ide_dma_timeout
, drive
);
1438 startstop
= ide_error(drive
, "irq timeout", GET_STAT());
1440 set_recovery_timer(hwif
);
1441 drive
->service_time
= jiffies
- drive
->service_start
;
1442 enable_irq(hwif
->irq
);
1443 spin_lock_irq(&io_request_lock
);
1444 if (startstop
== ide_stopped
)
1448 ide_do_request(hwgroup
);
1449 spin_unlock_irqrestore(&io_request_lock
, flags
);
1453 * There's nothing really useful we can do with an unexpected interrupt,
1454 * other than reading the status register (to clear it), and logging it.
1455 * There should be no way that an irq can happen before we're ready for it,
1456 * so we needn't worry much about losing an "important" interrupt here.
1458 * On laptops (and "green" PCs), an unexpected interrupt occurs whenever the
1459 * drive enters "idle", "standby", or "sleep" mode, so if the status looks
1460 * "good", we just ignore the interrupt completely.
1462 * This routine assumes __cli() is in effect when called.
1464 * If an unexpected interrupt happens on irq15 while we are handling irq14
1465 * and if the two interfaces are "serialized" (CMD640), then it looks like
1466 * we could screw up by interfering with a new request being set up for irq15.
1468 * In reality, this is a non-issue. The new command is not sent unless the
1469 * drive is ready to accept one, in which case we know the drive is not
1470 * trying to interrupt us. And ide_set_handler() is always invoked before
1471 * completing the issuance of any new drive command, so we will not be
1472 * accidently invoked as a result of any valid command completion interrupt.
1475 static void unexpected_intr (int irq
, ide_hwgroup_t
*hwgroup
)
1478 ide_hwif_t
*hwif
= hwgroup
->hwif
;
1481 * handle the unexpected interrupt
1484 if (hwif
->irq
== irq
) {
1485 stat
= IN_BYTE(hwif
->io_ports
[IDE_STATUS_OFFSET
]);
1486 if (!OK_STAT(stat
, READY_STAT
, BAD_STAT
)) {
1487 /* Try to not flood the console with msgs */
1488 static unsigned long last_msgtime
= 0, count
= 0;
1490 if (0 < (signed long)(jiffies
- (last_msgtime
+ HZ
))) {
1491 last_msgtime
= jiffies
;
1492 printk("%s%s: unexpected interrupt, status=0x%02x, count=%ld\n",
1493 hwif
->name
, (hwif
->next
== hwgroup
->hwif
) ? "" : "(?)", stat
, count
);
1497 } while ((hwif
= hwif
->next
) != hwgroup
->hwif
);
1501 * entry point for all interrupts, caller does __cli() for us
1503 void ide_intr (int irq
, void *dev_id
, struct pt_regs
*regs
)
1505 unsigned long flags
;
1506 ide_hwgroup_t
*hwgroup
= (ide_hwgroup_t
*)dev_id
;
1509 ide_handler_t
*handler
;
1510 ide_startstop_t startstop
;
1512 spin_lock_irqsave(&io_request_lock
, flags
);
1513 hwif
= hwgroup
->hwif
;
1515 if (!ide_ack_intr(hwif
)) {
1516 spin_unlock_irqrestore(&io_request_lock
, flags
);
1520 if ((handler
= hwgroup
->handler
) == NULL
|| hwgroup
->poll_timeout
!= 0) {
1522 * Not expecting an interrupt from this drive.
1523 * That means this could be:
1524 * (1) an interrupt from another PCI device
1525 * sharing the same PCI INT# as us.
1526 * or (2) a drive just entered sleep or standby mode,
1527 * and is interrupting to let us know.
1528 * or (3) a spurious interrupt of unknown origin.
1530 * For PCI, we cannot tell the difference,
1531 * so in that case we just ignore it and hope it goes away.
1533 #ifdef CONFIG_BLK_DEV_IDEPCI
1534 if (IDE_PCI_DEVID_EQ(hwif
->pci_devid
, IDE_PCI_DEVID_NULL
))
1535 #endif /* CONFIG_BLK_DEV_IDEPCI */
1538 * Probably not a shared PCI interrupt,
1539 * so we can safely try to do something about it:
1541 unexpected_intr(irq
, hwgroup
);
1542 #ifdef CONFIG_BLK_DEV_IDEPCI
1545 * Whack the status register, just in case we have a leftover pending IRQ.
1547 (void) IN_BYTE(hwif
->io_ports
[IDE_STATUS_OFFSET
]);
1548 #endif /* CONFIG_BLK_DEV_IDEPCI */
1550 spin_unlock_irqrestore(&io_request_lock
, flags
);
1553 drive
= hwgroup
->drive
;
1556 * This should NEVER happen, and there isn't much we could do about it here.
1558 spin_unlock_irqrestore(&io_request_lock
, flags
);
1561 if (!drive_is_ready(drive
)) {
1563 * This happens regularly when we share a PCI IRQ with another device.
1564 * Unfortunately, it can also happen with some buggy drives that trigger
1565 * the IRQ before their status register is up to date. Hopefully we have
1566 * enough advance overhead that the latter isn't a problem.
1568 spin_unlock_irqrestore(&io_request_lock
, flags
);
1571 if (!hwgroup
->busy
) {
1572 hwgroup
->busy
= 1; /* paranoia */
1573 printk("%s: ide_intr: hwgroup->busy was 0 ??\n", drive
->name
);
1575 hwgroup
->handler
= NULL
;
1576 del_timer(&hwgroup
->timer
);
1577 spin_unlock(&io_request_lock
);
1580 ide__sti(); /* local CPU only */
1581 startstop
= handler(drive
); /* service this interrupt, may set handler for next interrupt */
1582 spin_lock_irq(&io_request_lock
);
1585 * Note that handler() may have set things up for another
1586 * interrupt to occur soon, but it cannot happen until
1587 * we exit from this routine, because it will be the
1588 * same irq as is currently being serviced here, and Linux
1589 * won't allow another of the same (on any CPU) until we return.
1591 set_recovery_timer(HWIF(drive
));
1592 drive
->service_time
= jiffies
- drive
->service_start
;
1593 if (startstop
== ide_stopped
) {
1594 if (hwgroup
->handler
== NULL
) { /* paranoia */
1596 ide_do_request(hwgroup
);
1598 printk("%s: ide_intr: huh? expected NULL handler on exit\n", drive
->name
);
1601 spin_unlock_irqrestore(&io_request_lock
, flags
);
1605 * get_info_ptr() returns the (ide_drive_t *) for a given device number.
1606 * It returns NULL if the given device number does not match any present drives.
1608 ide_drive_t
*get_info_ptr (kdev_t i_rdev
)
1610 int major
= MAJOR(i_rdev
);
1613 for (h
= 0; h
< MAX_HWIFS
; ++h
) {
1614 ide_hwif_t
*hwif
= &ide_hwifs
[h
];
1615 if (hwif
->present
&& major
== hwif
->major
) {
1616 unsigned unit
= DEVICE_NR(i_rdev
);
1617 if (unit
< MAX_DRIVES
) {
1618 ide_drive_t
*drive
= &hwif
->drives
[unit
];
1629 * This function is intended to be used prior to invoking ide_do_drive_cmd().
1631 void ide_init_drive_cmd (struct request
*rq
)
1634 rq
->cmd
= IDE_DRIVE_CMD
;
1637 rq
->current_nr_sectors
= 0;
1645 * This function issues a special IDE device request
1646 * onto the request queue.
1648 * If action is ide_wait, then the rq is queued at the end of the
1649 * request queue, and the function sleeps until it has been processed.
1650 * This is for use when invoked from an ioctl handler.
1652 * If action is ide_preempt, then the rq is queued at the head of
1653 * the request queue, displacing the currently-being-processed
1654 * request and this function returns immediately without waiting
1655 * for the new rq to be completed. This is VERY DANGEROUS, and is
1656 * intended for careful use by the ATAPI tape/cdrom driver code.
1658 * If action is ide_next, then the rq is queued immediately after
1659 * the currently-being-processed-request (if any), and the function
1660 * returns without waiting for the new rq to be completed. As above,
1661 * This is VERY DANGEROUS, and is intended for careful use by the
1662 * ATAPI tape/cdrom driver code.
1664 * If action is ide_end, then the rq is queued at the end of the
1665 * request queue, and the function returns immediately without waiting
1666 * for the new rq to be completed. This is again intended for careful
1667 * use by the ATAPI tape/cdrom driver code.
1669 int ide_do_drive_cmd (ide_drive_t
*drive
, struct request
*rq
, ide_action_t action
)
1671 unsigned long flags
;
1672 ide_hwgroup_t
*hwgroup
= HWGROUP(drive
);
1673 unsigned int major
= HWIF(drive
)->major
;
1674 struct request
*cur_rq
;
1675 DECLARE_MUTEX_LOCKED(sem
);
1677 #ifdef CONFIG_BLK_DEV_PDC4030
1678 if (HWIF(drive
)->chipset
== ide_pdc4030
&& rq
->buffer
!= NULL
)
1679 return -ENOSYS
; /* special drive cmds not supported */
1682 rq
->rq_status
= RQ_ACTIVE
;
1683 rq
->rq_dev
= MKDEV(major
,(drive
->select
.b
.unit
)<<PARTN_BITS
);
1684 if (action
== ide_wait
)
1686 spin_lock_irqsave(&io_request_lock
, flags
);
1687 cur_rq
= drive
->queue
.current_request
;
1688 if (cur_rq
== NULL
|| action
== ide_preempt
) {
1690 drive
->queue
.current_request
= rq
;
1691 if (action
== ide_preempt
)
1694 if (action
== ide_wait
|| action
== ide_end
) {
1695 while (cur_rq
->next
!= NULL
) /* find end of list */
1696 cur_rq
= cur_rq
->next
;
1698 rq
->next
= cur_rq
->next
;
1701 ide_do_request(hwgroup
);
1702 spin_unlock_irqrestore(&io_request_lock
, flags
);
1703 if (action
== ide_wait
) {
1704 down(&sem
); /* wait for it to be serviced */
1705 return rq
->errors
? -EIO
: 0; /* return -EIO if errors */
1712 * This routine is called to flush all partitions and partition tables
1713 * for a changed disk, and then re-read the new partition table.
1714 * If we are revalidating a disk because of a media change, then we
1715 * enter with usage == 0. If we are using an ioctl, we automatically have
1716 * usage == 1 (we need an open channel to use an ioctl :-), so this
1719 int ide_revalidate_disk (kdev_t i_rdev
)
1722 ide_hwgroup_t
*hwgroup
;
1723 unsigned int p
, major
, minor
;
1726 if ((drive
= get_info_ptr(i_rdev
)) == NULL
)
1728 major
= MAJOR(i_rdev
);
1729 minor
= drive
->select
.b
.unit
<< PARTN_BITS
;
1730 hwgroup
= HWGROUP(drive
);
1731 spin_lock_irqsave(&io_request_lock
, flags
);
1732 if (drive
->busy
|| (drive
->usage
> 1)) {
1733 spin_unlock_irqrestore(&io_request_lock
, flags
);
1738 spin_unlock_irqrestore(&io_request_lock
, flags
);
1740 for (p
= 0; p
< (1<<PARTN_BITS
); ++p
) {
1741 if (drive
->part
[p
].nr_sects
> 0) {
1742 kdev_t devp
= MKDEV(major
, minor
+p
);
1743 struct super_block
* sb
= get_super(devp
);
1746 invalidate_inodes(sb
);
1747 invalidate_buffers (devp
);
1748 set_blocksize(devp
, 1024);
1750 drive
->part
[p
].start_sect
= 0;
1751 drive
->part
[p
].nr_sects
= 0;
1754 drive
->part
[0].nr_sects
= current_capacity(drive
);
1755 if ((drive
->media
!= ide_disk
&& drive
->media
!= ide_floppy
) ||
1756 drive
->driver
== NULL
|| !drive
->part
[0].nr_sects
)
1757 drive
->part
[0].start_sect
= -1;
1758 resetup_one_dev(HWIF(drive
)->gd
, drive
->select
.b
.unit
);
1761 wake_up(&drive
->wqueue
);
1766 static void revalidate_drives (void)
1772 for (index
= 0; index
< MAX_HWIFS
; ++index
) {
1773 hwif
= &ide_hwifs
[index
];
1774 for (unit
= 0; unit
< MAX_DRIVES
; ++unit
) {
1775 drive
= &ide_hwifs
[index
].drives
[unit
];
1776 if (drive
->revalidate
) {
1777 drive
->revalidate
= 0;
1779 (void) ide_revalidate_disk(MKDEV(hwif
->major
, unit
<<PARTN_BITS
));
1785 static void ide_init_module (int type
)
1788 ide_module_t
*module
= ide_modules
;
1791 if (module
->type
== type
) {
1793 (void) module
->init();
1795 module
= module
->next
;
1797 revalidate_drives();
1799 if (!found
&& type
== IDE_PROBE_MODULE
)
1800 (void) request_module("ide-probe");
1801 #endif /* CONFIG_KMOD */
1804 static int ide_open (struct inode
* inode
, struct file
* filp
)
1809 if ((drive
= get_info_ptr(inode
->i_rdev
)) == NULL
)
1812 if (drive
->driver
== NULL
)
1813 ide_init_module(IDE_DRIVER_MODULE
);
1815 if (drive
->driver
== NULL
) {
1816 if (drive
->media
== ide_disk
)
1817 (void) request_module("ide-disk");
1818 if (drive
->media
== ide_cdrom
)
1819 (void) request_module("ide-cd");
1820 if (drive
->media
== ide_tape
)
1821 (void) request_module("ide-tape");
1822 if (drive
->media
== ide_floppy
)
1823 (void) request_module("ide-floppy");
1825 #endif /* CONFIG_KMOD */
1827 sleep_on(&drive
->wqueue
);
1829 if (drive
->driver
!= NULL
) {
1830 if ((rc
= DRIVER(drive
)->open(inode
, filp
, drive
)))
1834 printk ("%s: driver not present\n", drive
->name
);
1841 * Releasing a block device means we sync() it, so that it can safely
1842 * be forgotten about...
1844 static int ide_release (struct inode
* inode
, struct file
* file
)
1848 if ((drive
= get_info_ptr(inode
->i_rdev
)) != NULL
) {
1850 if (drive
->driver
!= NULL
)
1851 DRIVER(drive
)->release(inode
, file
, drive
);
1857 int ide_replace_subdriver (ide_drive_t
*drive
, const char *driver
)
1859 if (!drive
->present
|| drive
->busy
|| drive
->usage
)
1861 if (drive
->driver
!= NULL
&& DRIVER(drive
)->cleanup(drive
))
1863 strncpy(drive
->driver_req
, driver
, 9);
1864 ide_init_module(IDE_DRIVER_MODULE
);
1865 drive
->driver_req
[0] = 0;
1866 ide_init_module(IDE_DRIVER_MODULE
);
1867 if (DRIVER(drive
) && !strcmp(DRIVER(drive
)->name
, driver
))
1873 #ifdef CONFIG_PROC_FS
1874 ide_proc_entry_t generic_subdriver_entries
[] = {
1875 { "capacity", S_IFREG
|S_IRUGO
, proc_ide_read_capacity
, NULL
},
1876 { NULL
, 0, NULL
, NULL
}
1880 void ide_unregister (unsigned int index
)
1882 struct gendisk
*gd
, **gdp
;
1883 ide_drive_t
*drive
, *d
;
1884 ide_hwif_t
*hwif
, *g
;
1885 ide_hwgroup_t
*hwgroup
;
1886 int irq_count
= 0, unit
, i
;
1887 unsigned long flags
;
1888 unsigned int p
, minor
;
1889 ide_hwif_t old_hwif
;
1891 if (index
>= MAX_HWIFS
)
1893 save_flags(flags
); /* all CPUs */
1894 cli(); /* all CPUs */
1895 hwif
= &ide_hwifs
[index
];
1898 for (unit
= 0; unit
< MAX_DRIVES
; ++unit
) {
1899 drive
= &hwif
->drives
[unit
];
1900 if (!drive
->present
)
1902 if (drive
->busy
|| drive
->usage
)
1904 if (drive
->driver
!= NULL
&& DRIVER(drive
)->cleanup(drive
))
1910 * All clear? Then blow away the buffer cache
1913 for (unit
= 0; unit
< MAX_DRIVES
; ++unit
) {
1914 drive
= &hwif
->drives
[unit
];
1915 if (!drive
->present
)
1917 minor
= drive
->select
.b
.unit
<< PARTN_BITS
;
1918 for (p
= 0; p
< (1<<PARTN_BITS
); ++p
) {
1919 if (drive
->part
[p
].nr_sects
> 0) {
1920 kdev_t devp
= MKDEV(hwif
->major
, minor
+p
);
1921 struct super_block
* sb
= get_super(devp
);
1922 if (sb
) invalidate_inodes(sb
);
1923 invalidate_buffers (devp
);
1926 #ifdef CONFIG_PROC_FS
1927 destroy_proc_ide_drives(hwif
);
1931 hwgroup
= hwif
->hwgroup
;
1934 * free the irq if we were the only hwif using it
1938 if (g
->irq
== hwif
->irq
)
1941 } while (g
!= hwgroup
->hwif
);
1943 free_irq(hwif
->irq
, hwgroup
);
1946 * Note that we only release the standard ports,
1947 * and do not even try to handle any extra ports
1948 * allocated for weird IDE interface chipsets.
1950 ide_release_region(hwif
->io_ports
[IDE_DATA_OFFSET
], 8);
1951 if (hwif
->io_ports
[IDE_CONTROL_OFFSET
])
1952 ide_release_region(hwif
->io_ports
[IDE_CONTROL_OFFSET
], 1);
1955 * Remove us from the hwgroup, and free
1956 * the hwgroup if we were the only member
1959 for (i
= 0; i
< MAX_DRIVES
; ++i
) {
1960 drive
= &hwif
->drives
[i
];
1961 if (!drive
->present
)
1963 while (hwgroup
->drive
->next
!= drive
)
1964 hwgroup
->drive
= hwgroup
->drive
->next
;
1965 hwgroup
->drive
->next
= drive
->next
;
1966 if (hwgroup
->drive
== drive
)
1967 hwgroup
->drive
= NULL
;
1968 if (drive
->id
!= NULL
) {
1976 while (hwgroup
->hwif
->next
!= hwif
)
1977 hwgroup
->hwif
= hwgroup
->hwif
->next
;
1978 hwgroup
->hwif
->next
= hwif
->next
;
1979 if (hwgroup
->hwif
== hwif
)
1982 hwgroup
->hwif
= HWIF(hwgroup
->drive
);
1984 #ifdef CONFIG_BLK_DEV_IDEDMA
1986 (void) ide_release_dma(hwif
);
1987 #endif /* CONFIG_BLK_DEV_IDEDMA */
1990 * Remove us from the kernel's knowledge
1992 unregister_blkdev(hwif
->major
, hwif
->name
);
1993 kfree(blksize_size
[hwif
->major
]);
1994 kfree(max_sectors
[hwif
->major
]);
1995 kfree(max_readahead
[hwif
->major
]);
1996 blk_cleanup_queue(BLK_DEFAULT_QUEUE(hwif
->major
));
1997 blk_dev
[hwif
->major
].data
= NULL
;
1998 blk_dev
[hwif
->major
].queue
= NULL
;
1999 blksize_size
[hwif
->major
] = NULL
;
2000 for (gdp
= &gendisk_head
; *gdp
; gdp
= &((*gdp
)->next
))
2001 if (*gdp
== hwif
->gd
)
2004 printk("gd not in disk chain!\n");
2006 gd
= *gdp
; *gdp
= gd
->next
;
2012 init_hwif_data (index
); /* restore hwif data to pristine status */
2013 hwif
->hwgroup
= old_hwif
.hwgroup
;
2014 hwif
->tuneproc
= old_hwif
.tuneproc
;
2015 hwif
->resetproc
= old_hwif
.resetproc
;
2016 hwif
->dmaproc
= old_hwif
.dmaproc
;
2017 hwif
->dma_base
= old_hwif
.dma_base
;
2018 hwif
->dma_extra
= old_hwif
.dma_extra
;
2019 hwif
->config_data
= old_hwif
.config_data
;
2020 hwif
->select_data
= old_hwif
.select_data
;
2021 hwif
->irq
= old_hwif
.irq
;
2022 hwif
->major
= old_hwif
.major
;
2023 hwif
->proc
= old_hwif
.proc
;
2024 hwif
->udma_four
= old_hwif
.udma_four
;
2025 hwif
->chipset
= old_hwif
.chipset
;
2026 hwif
->pci_dev
= old_hwif
.pci_dev
;
2027 hwif
->pci_devid
= old_hwif
.pci_devid
;
2029 restore_flags(flags
); /* all CPUs */
2033 * Setup hw_regs_t structure described by parameters. You
2034 * may set up the hw structure yourself OR use this routine to
2037 void ide_setup_ports ( hw_regs_t
*hw
,
2038 ide_ioreg_t base
, int *offsets
,
2039 ide_ioreg_t ctrl
, ide_ioreg_t intr
,
2040 ide_ack_intr_t
*ack_intr
, int irq
)
2044 for (i
= 0; i
< IDE_NR_PORTS
; i
++) {
2045 if (offsets
[i
] == -1) {
2047 case IDE_CONTROL_OFFSET
:
2048 hw
->io_ports
[i
] = ctrl
;
2050 case IDE_IRQ_OFFSET
:
2051 hw
->io_ports
[i
] = intr
;
2054 hw
->io_ports
[i
] = 0;
2058 hw
->io_ports
[i
] = base
+ offsets
[i
];
2062 hw
->ack_intr
= ack_intr
;
2066 * Register an IDE interface, specifing exactly the registers etc
2067 * Set init=1 iff calling before probes have taken place.
2069 int ide_register_hw (hw_regs_t
*hw
, ide_hwif_t
**hwifp
)
2071 int index
, retry
= 1;
2075 for (index
= 0; index
< MAX_HWIFS
; ++index
) {
2076 hwif
= &ide_hwifs
[index
];
2077 if (hwif
->hw
.io_ports
[IDE_DATA_OFFSET
] == hw
->io_ports
[IDE_DATA_OFFSET
])
2080 for (index
= 0; index
< MAX_HWIFS
; ++index
) {
2081 hwif
= &ide_hwifs
[index
];
2082 if ((!hwif
->present
&& !hwif
->mate
&& !initializing
) ||
2083 (!hwif
->hw
.io_ports
[IDE_DATA_OFFSET
] && initializing
))
2086 for (index
= 0; index
< MAX_HWIFS
; index
++)
2087 ide_unregister(index
);
2092 ide_unregister(index
);
2095 memcpy(&hwif
->hw
, hw
, sizeof(*hw
));
2096 memcpy(hwif
->io_ports
, hwif
->hw
.io_ports
, sizeof(hwif
->hw
.io_ports
));
2097 hwif
->irq
= hw
->irq
;
2100 if (!initializing
) {
2101 ide_init_module(IDE_PROBE_MODULE
);
2102 #ifdef CONFIG_PROC_FS
2103 create_proc_ide_interfaces();
2105 ide_init_module(IDE_DRIVER_MODULE
);
2111 return (initializing
|| hwif
->present
) ? index
: -1;
2115 * Compatability function with existing drivers. If you want
2116 * something different, use the function above.
2118 int ide_register (int arg1
, int arg2
, int irq
)
2121 ide_init_hwif_ports(&hw
, (ide_ioreg_t
) arg1
, (ide_ioreg_t
) arg2
, NULL
);
2123 return ide_register_hw(&hw
, NULL
);
2126 void 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
)
2128 ide_settings_t
**p
= (ide_settings_t
**) &drive
->settings
, *setting
= NULL
;
2130 while ((*p
) && strcmp((*p
)->name
, name
) < 0)
2132 if ((setting
= kmalloc(sizeof(*setting
), GFP_KERNEL
)) == NULL
)
2134 memset(setting
, 0, sizeof(*setting
));
2135 if ((setting
->name
= kmalloc(strlen(name
) + 1, GFP_KERNEL
)) == NULL
)
2137 strcpy(setting
->name
, name
); setting
->rw
= rw
;
2138 setting
->read_ioctl
= read_ioctl
; setting
->write_ioctl
= write_ioctl
;
2139 setting
->data_type
= data_type
; setting
->min
= min
;
2140 setting
->max
= max
; setting
->mul_factor
= mul_factor
;
2141 setting
->div_factor
= div_factor
; setting
->data
= data
;
2142 setting
->set
= set
; setting
->next
= *p
;
2144 setting
->auto_remove
= 1;
2152 void ide_remove_setting (ide_drive_t
*drive
, char *name
)
2154 ide_settings_t
**p
= (ide_settings_t
**) &drive
->settings
, *setting
;
2156 while ((*p
) && strcmp((*p
)->name
, name
))
2158 if ((setting
= (*p
)) == NULL
)
2160 (*p
) = setting
->next
;
2161 kfree(setting
->name
);
2165 static ide_settings_t
*ide_find_setting_by_ioctl (ide_drive_t
*drive
, int cmd
)
2167 ide_settings_t
*setting
= drive
->settings
;
2170 if (setting
->read_ioctl
== cmd
|| setting
->write_ioctl
== cmd
)
2172 setting
= setting
->next
;
2177 ide_settings_t
*ide_find_setting_by_name (ide_drive_t
*drive
, char *name
)
2179 ide_settings_t
*setting
= drive
->settings
;
2182 if (strcmp(setting
->name
, name
) == 0)
2184 setting
= setting
->next
;
2189 static void auto_remove_settings (ide_drive_t
*drive
)
2191 ide_settings_t
*setting
;
2193 setting
= drive
->settings
;
2195 if (setting
->auto_remove
) {
2196 ide_remove_setting(drive
, setting
->name
);
2199 setting
= setting
->next
;
2203 int ide_read_setting (ide_drive_t
*drive
, ide_settings_t
*setting
)
2206 unsigned long flags
;
2208 if ((setting
->rw
& SETTING_READ
)) {
2209 spin_lock_irqsave(&io_request_lock
, flags
);
2210 switch(setting
->data_type
) {
2212 val
= *((u8
*) setting
->data
);
2215 val
= *((u16
*) setting
->data
);
2219 val
= *((u32
*) setting
->data
);
2222 spin_unlock_irqrestore(&io_request_lock
, flags
);
2227 int ide_spin_wait_hwgroup (ide_drive_t
*drive
, unsigned long *flags
)
2229 ide_hwgroup_t
*hwgroup
= HWGROUP(drive
);
2230 unsigned long timeout
= jiffies
+ (3 * HZ
);
2232 spin_lock_irqsave(&io_request_lock
, *flags
);
2233 while (hwgroup
->busy
) {
2234 unsigned long lflags
;
2235 spin_unlock_irqrestore(&io_request_lock
, *flags
);
2236 __save_flags(lflags
); /* local CPU only */
2237 __sti(); /* local CPU only; needed for jiffies */
2238 if (0 < (signed long)(jiffies
- timeout
)) {
2239 __restore_flags(lflags
); /* local CPU only */
2240 printk("%s: channel busy\n", drive
->name
);
2243 __restore_flags(lflags
); /* local CPU only */
2244 spin_lock_irqsave(&io_request_lock
, *flags
);
2250 * FIXME: This should be changed to enqueue a special request
2251 * to the driver to change settings, and then wait on a sema for completion.
2252 * The current scheme of polling is kludgey, though safe enough.
2254 int ide_write_setting (ide_drive_t
*drive
, ide_settings_t
*setting
, int val
)
2256 unsigned long flags
;
2260 if (!capable(CAP_SYS_ADMIN
))
2262 if (!(setting
->rw
& SETTING_WRITE
))
2264 if (val
< setting
->min
|| val
> setting
->max
)
2267 return setting
->set(drive
, val
);
2268 if (ide_spin_wait_hwgroup(drive
, &flags
))
2270 switch (setting
->data_type
) {
2272 *((u8
*) setting
->data
) = val
;
2275 *((u16
*) setting
->data
) = val
;
2278 *((u32
*) setting
->data
) = val
;
2281 p
= (u32
*) setting
->data
;
2282 for (i
= 0; i
< 1 << PARTN_BITS
; i
++, p
++)
2286 spin_unlock_irqrestore(&io_request_lock
, flags
);
2290 static int set_io_32bit(ide_drive_t
*drive
, int arg
)
2292 drive
->io_32bit
= arg
;
2293 #ifdef CONFIG_BLK_DEV_DTC2278
2294 if (HWIF(drive
)->chipset
== ide_dtc2278
)
2295 HWIF(drive
)->drives
[!drive
->select
.b
.unit
].io_32bit
= arg
;
2296 #endif /* CONFIG_BLK_DEV_DTC2278 */
2300 static int set_using_dma (ide_drive_t
*drive
, int arg
)
2302 if (!drive
->driver
|| !DRIVER(drive
)->supports_dma
)
2304 if (!drive
->id
|| !(drive
->id
->capability
& 1) || !HWIF(drive
)->dmaproc
)
2306 if (HWIF(drive
)->dmaproc(arg
? ide_dma_on
: ide_dma_off
, drive
))
2311 static int set_pio_mode (ide_drive_t
*drive
, int arg
)
2315 if (!HWIF(drive
)->tuneproc
)
2317 if (drive
->special
.b
.set_tune
)
2319 ide_init_drive_cmd(&rq
);
2320 drive
->tune_req
= (byte
) arg
;
2321 drive
->special
.b
.set_tune
= 1;
2322 (void) ide_do_drive_cmd (drive
, &rq
, ide_wait
);
2326 void ide_add_generic_settings (ide_drive_t
*drive
)
2329 * drive setting name read/write access read ioctl write ioctl data type min max mul_factor div_factor data pointer set function
2331 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
);
2332 ide_add_setting(drive
, "keepsettings", SETTING_RW
, HDIO_GET_KEEPSETTINGS
, HDIO_SET_KEEPSETTINGS
, TYPE_BYTE
, 0, 1, 1, 1, &drive
->keep_settings
, NULL
);
2333 ide_add_setting(drive
, "nice1", SETTING_RW
, -1, -1, TYPE_BYTE
, 0, 1, 1, 1, &drive
->nice1
, NULL
);
2334 ide_add_setting(drive
, "pio_mode", SETTING_WRITE
, -1, HDIO_SET_PIO_MODE
, TYPE_BYTE
, 0, 255, 1, 1, NULL
, set_pio_mode
);
2335 ide_add_setting(drive
, "slow", SETTING_RW
, -1, -1, TYPE_BYTE
, 0, 1, 1, 1, &drive
->slow
, NULL
);
2336 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
);
2337 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
);
2338 ide_add_setting(drive
, "ide_scsi", SETTING_RW
, -1, -1, TYPE_BYTE
, 0, 1, 1, 1, &drive
->scsi
, NULL
);
2341 int ide_wait_cmd (ide_drive_t
*drive
, int cmd
, int nsect
, int feature
, int sectors
, byte
*buf
)
2348 memset(buf
, 0, 4 + SECTOR_WORDS
* 4 * sectors
);
2349 ide_init_drive_cmd(&rq
);
2355 return ide_do_drive_cmd(drive
, &rq
, ide_wait
);
2359 * Delay for *at least* 50ms. As we don't know how much time is left
2360 * until the next tick occurs, we wait an extra tick to be safe.
2361 * This is used only during the probing/polling for drives at boot time.
2363 * However, its usefullness may be needed in other places, thus we export it now.
2364 * The future may change this to a millisecond setable delay.
2366 void ide_delay_50ms (void)
2368 unsigned long timeout
= jiffies
+ ((HZ
+ 19)/20) + 1;
2369 while (0 < (signed long)(timeout
- jiffies
));
2372 static int ide_ioctl (struct inode
*inode
, struct file
*file
,
2373 unsigned int cmd
, unsigned long arg
)
2375 int err
= 0, major
, minor
;
2379 ide_settings_t
*setting
;
2381 if (!inode
|| !(dev
= inode
->i_rdev
))
2383 major
= MAJOR(dev
); minor
= MINOR(dev
);
2384 if ((drive
= get_info_ptr(inode
->i_rdev
)) == NULL
)
2387 if ((setting
= ide_find_setting_by_ioctl(drive
, cmd
)) != NULL
) {
2388 if (cmd
== setting
->read_ioctl
) {
2389 err
= ide_read_setting(drive
, setting
);
2390 return err
>= 0 ? put_user(err
, (long *) arg
) : err
;
2392 if ((MINOR(inode
->i_rdev
) & PARTN_MASK
))
2394 return ide_write_setting(drive
, setting
, arg
);
2398 ide_init_drive_cmd (&rq
);
2402 struct hd_geometry
*loc
= (struct hd_geometry
*) arg
;
2403 unsigned short bios_cyl
= drive
->bios_cyl
; /* truncate */
2404 if (!loc
|| (drive
->media
!= ide_disk
&& drive
->media
!= ide_floppy
)) return -EINVAL
;
2405 if (put_user(drive
->bios_head
, (byte
*) &loc
->heads
)) return -EFAULT
;
2406 if (put_user(drive
->bios_sect
, (byte
*) &loc
->sectors
)) return -EFAULT
;
2407 if (put_user(bios_cyl
, (unsigned short *) &loc
->cylinders
)) return -EFAULT
;
2408 if (put_user((unsigned)drive
->part
[MINOR(inode
->i_rdev
)&PARTN_MASK
].start_sect
,
2409 (unsigned long *) &loc
->start
)) return -EFAULT
;
2413 case BLKGETSIZE
: /* Return device size */
2414 return put_user(drive
->part
[MINOR(inode
->i_rdev
)&PARTN_MASK
].nr_sects
, (long *) arg
);
2416 case BLKRRPART
: /* Re-read partition tables */
2417 if (!capable(CAP_SYS_ADMIN
)) return -EACCES
;
2418 return ide_revalidate_disk(inode
->i_rdev
);
2420 case HDIO_OBSOLETE_IDENTITY
:
2421 case HDIO_GET_IDENTITY
:
2422 if (MINOR(inode
->i_rdev
) & PARTN_MASK
)
2424 if (drive
->id
== NULL
)
2426 if (copy_to_user((char *)arg
, (char *)drive
->id
, (cmd
== HDIO_GET_IDENTITY
) ? sizeof(*drive
->id
) : 142))
2431 return put_user(drive
->dsc_overlap
<< IDE_NICE_DSC_OVERLAP
|
2432 drive
->atapi_overlap
<< IDE_NICE_ATAPI_OVERLAP
|
2433 drive
->nice0
<< IDE_NICE_0
|
2434 drive
->nice1
<< IDE_NICE_1
|
2435 drive
->nice2
<< IDE_NICE_2
,
2437 case HDIO_DRIVE_CMD
:
2439 byte args
[4], *argbuf
= args
;
2441 if (!capable(CAP_SYS_ADMIN
)) return -EACCES
;
2442 if (NULL
== (void *) arg
)
2443 return ide_do_drive_cmd(drive
, &rq
, ide_wait
);
2444 if (copy_from_user(args
, (void *)arg
, 4))
2447 argsize
= 4 + (SECTOR_WORDS
* 4 * args
[3]);
2448 argbuf
= kmalloc(argsize
, GFP_KERNEL
);
2451 memcpy(argbuf
, args
, 4);
2453 if (ide_ata66_check(drive
, args
[0], args
[1], args
[2]))
2456 err
= ide_wait_cmd(drive
, args
[0], args
[1], args
[2], args
[3], argbuf
);
2458 if (!err
&& set_transfer(drive
, args
[0], args
[1], args
[2])) {
2459 ide_driveid_update(drive
);
2462 if (copy_to_user((void *)arg
, argbuf
, argsize
))
2469 case HDIO_SCAN_HWIF
:
2472 if (!capable(CAP_SYS_ADMIN
)) return -EACCES
;
2473 if (copy_from_user(args
, (void *)arg
, 3 * sizeof(int)))
2475 if (ide_register(args
[0], args
[1], args
[2]) == -1)
2479 case HDIO_UNREGISTER_HWIF
:
2480 if (!capable(CAP_SYS_ADMIN
)) return -EACCES
;
2481 /* should I check here for arg > MAX_HWIFS, or
2482 just let ide_unregister fail silently? -- shaver */
2483 ide_unregister(arg
);
2486 if (!capable(CAP_SYS_ADMIN
)) return -EACCES
;
2487 if (drive
->driver
== NULL
)
2489 if (arg
!= (arg
& ((1 << IDE_NICE_DSC_OVERLAP
) | (1 << IDE_NICE_1
))))
2491 drive
->dsc_overlap
= (arg
>> IDE_NICE_DSC_OVERLAP
) & 1;
2492 if (drive
->dsc_overlap
&& !DRIVER(drive
)->supports_dsc_overlap
) {
2493 drive
->dsc_overlap
= 0;
2496 drive
->nice1
= (arg
>> IDE_NICE_1
) & 1;
2504 return blk_ioctl(inode
->i_rdev
, cmd
, arg
);
2507 if (drive
->driver
!= NULL
)
2508 return DRIVER(drive
)->ioctl(drive
, inode
, file
, cmd
, arg
);
2513 static int ide_check_media_change (kdev_t i_rdev
)
2517 if ((drive
= get_info_ptr(i_rdev
)) == NULL
)
2519 if (drive
->driver
!= NULL
)
2520 return DRIVER(drive
)->media_change(drive
);
2524 void ide_fixstring (byte
*s
, const int bytecount
, const int byteswap
)
2526 byte
*p
= s
, *end
= &s
[bytecount
& ~1]; /* bytecount must be even */
2529 /* convert from big-endian to host byte order */
2530 for (p
= end
; p
!= s
;) {
2531 unsigned short *pp
= (unsigned short *) (p
-= 2);
2536 /* strip leading blanks */
2537 while (s
!= end
&& *s
== ' ')
2540 /* compress internal blanks and strip trailing blanks */
2541 while (s
!= end
&& *s
) {
2542 if (*s
++ != ' ' || (s
!= end
&& *s
&& *s
!= ' '))
2546 /* wipe out trailing garbage */
2552 * stridx() returns the offset of c within s,
2553 * or -1 if c is '\0' or not found within s.
2555 static int __init
stridx (const char *s
, char c
)
2557 char *i
= strchr(s
, c
);
2558 return (i
&& c
) ? i
- s
: -1;
2562 * match_parm() does parsing for ide_setup():
2564 * 1. the first char of s must be '='.
2565 * 2. if the remainder matches one of the supplied keywords,
2566 * the index (1 based) of the keyword is negated and returned.
2567 * 3. if the remainder is a series of no more than max_vals numbers
2568 * separated by commas, the numbers are saved in vals[] and a
2569 * count of how many were saved is returned. Base10 is assumed,
2570 * and base16 is allowed when prefixed with "0x".
2571 * 4. otherwise, zero is returned.
2573 static int __init
match_parm (char *s
, const char *keywords
[], int vals
[], int max_vals
)
2575 static const char *decimal
= "0123456789";
2576 static const char *hex
= "0123456789abcdef";
2581 * Try matching against the supplied keywords,
2582 * and return -(index+1) if we match one
2584 if (keywords
!= NULL
) {
2585 for (i
= 0; *keywords
!= NULL
; ++i
) {
2586 if (!strcmp(s
, *keywords
++))
2591 * Look for a series of no more than "max_vals"
2592 * numeric values separated by commas, in base10,
2593 * or base16 when prefixed with "0x".
2594 * Return a count of how many were found.
2596 for (n
= 0; (i
= stridx(decimal
, *s
)) >= 0;) {
2598 while ((i
= stridx(decimal
, *++s
)) >= 0)
2599 vals
[n
] = (vals
[n
] * 10) + i
;
2600 if (*s
== 'x' && !vals
[n
]) {
2601 while ((i
= stridx(hex
, *++s
)) >= 0)
2602 vals
[n
] = (vals
[n
] * 0x10) + i
;
2604 if (++n
== max_vals
)
2606 if (*s
== ',' || *s
== ';')
2612 return 0; /* zero = nothing matched */
2616 * ide_setup() gets called VERY EARLY during initialization,
2617 * to handle kernel "command line" strings beginning with "hdx="
2618 * or "ide". Here is the complete set currently supported:
2620 * "hdx=" is recognized for all "x" from "a" to "h", such as "hdc".
2621 * "idex=" is recognized for all "x" from "0" to "3", such as "ide1".
2623 * "hdx=noprobe" : drive may be present, but do not probe for it
2624 * "hdx=none" : drive is NOT present, ignore cmos and do not probe
2625 * "hdx=nowerr" : ignore the WRERR_STAT bit on this drive
2626 * "hdx=cdrom" : drive is present, and is a cdrom drive
2627 * "hdx=cyl,head,sect" : disk drive is present, with specified geometry
2628 * "hdx=noremap" : do not remap 0->1 even though EZD was detected
2629 * "hdx=autotune" : driver will attempt to tune interface speed
2630 * to the fastest PIO mode supported,
2631 * if possible for this drive only.
2632 * Not fully supported by all chipset types,
2633 * and quite likely to cause trouble with
2634 * older/odd IDE drives.
2636 * "hdx=slow" : insert a huge pause after each access to the data
2637 * port. Should be used only as a last resort.
2639 * "hdx=swapdata" : when the drive is a disk, byte swap all data
2640 * "hdx=bswap" : same as above..........
2641 * "hdxlun=xx" : set the drive last logical unit.
2642 * "hdx=flash" : allows for more than one ata_flash disk to be
2643 * registered. In most cases, only one device
2645 * "hdx=scsi" : the return of the ide-scsi flag, this is useful for
2646 * allowwing ide-floppy, ide-tape, and ide-cdrom|writers
2647 * to use ide-scsi emulation on a device specific option.
2648 * "idebus=xx" : inform IDE driver of VESA/PCI bus speed in MHz,
2649 * where "xx" is between 20 and 66 inclusive,
2650 * used when tuning chipset PIO modes.
2651 * For PCI bus, 25 is correct for a P75 system,
2652 * 30 is correct for P90,P120,P180 systems,
2653 * and 33 is used for P100,P133,P166 systems.
2654 * If in doubt, use idebus=33 for PCI.
2655 * As for VLB, it is safest to not specify it.
2657 * "idex=noprobe" : do not attempt to access/use this interface
2658 * "idex=base" : probe for an interface at the addr specified,
2659 * where "base" is usually 0x1f0 or 0x170
2660 * and "ctl" is assumed to be "base"+0x206
2661 * "idex=base,ctl" : specify both base and ctl
2662 * "idex=base,ctl,irq" : specify base, ctl, and irq number
2663 * "idex=autotune" : driver will attempt to tune interface speed
2664 * to the fastest PIO mode supported,
2665 * for all drives on this interface.
2666 * Not fully supported by all chipset types,
2667 * and quite likely to cause trouble with
2668 * older/odd IDE drives.
2669 * "idex=noautotune" : driver will NOT attempt to tune interface speed
2670 * This is the default for most chipsets,
2671 * except the cmd640.
2672 * "idex=serialize" : do not overlap operations on idex and ide(x^1)
2673 * "idex=four" : four drives on idex and ide(x^1) share same ports
2674 * "idex=reset" : reset interface before first use
2675 * "idex=dma" : enable DMA by default on both drives if possible
2676 * "idex=ata66" : informs the interface that it has an 80c cable
2677 * for chipsets that are ATA-66 capable, but
2678 * the ablity to bit test for detection is
2679 * currently unknown.
2681 * "splitfifo=betweenChan"
2682 * : FIFO Configuration of VIA 82c586(<nothing>,"A"or"B").
2683 * --see what follows...
2684 * "splitfifo=betweenChan,thresholdprim,thresholdsec"
2685 * : FIFO Configuration of VIA 82c586(<nothing>,"A" or "B").
2686 * betweenChan = 1(all FIFO's to primary channel)
2687 * , 2(all FIFO's to secondary channel)
2688 * , 3 or 4(evenly shared between them).
2689 * note: without FIFO, a channel is (u)dma disabled!
2690 * thresholdprim = 4, 3, 2 or 1
2691 * (standing for 1, 3/4, 1/2, 1/4).
2692 * Sets the threshold of FIFO to begin dma
2693 * transfer on the primary channel.
2694 * thresholdsec = cf upper, but for secondary channel.
2696 * The following are valid ONLY on ide0, (except dc4030)
2697 * and the defaults for the base,ctl ports must not be altered.
2699 * "ide0=dtc2278" : probe/support DTC2278 interface
2700 * "ide0=ht6560b" : probe/support HT6560B interface
2701 * "ide0=cmd640_vlb" : *REQUIRED* for VLB cards with the CMD640 chip
2702 * (not for PCI -- automatically detected)
2703 * "ide0=qd6580" : probe/support qd6580 interface
2704 * "ide0=ali14xx" : probe/support ali14xx chipsets (ALI M1439, M1443, M1445)
2705 * "ide0=umc8672" : probe/support umc8672 chipsets
2706 * "idex=dc4030" : probe/support Promise DC4030VL interface
2707 * "ide=doubler" : probe/support IDE doublers on Amiga
2709 int __init
ide_setup (char *s
)
2714 unsigned int hw
, unit
;
2715 const char max_drive
= 'a' + ((MAX_HWIFS
* MAX_DRIVES
) - 1);
2716 const char max_hwif
= '0' + (MAX_HWIFS
- 1);
2718 printk("ide_setup: %s", s
);
2720 #ifdef CONFIG_BLK_DEV_IDEDOUBLER
2721 if (!strcmp(s
, "ide=doubler")) {
2722 extern int ide_doubler
;
2724 printk("ide: Enabled support for IDE doublers\n");
2728 #endif /* CONFIG_BLK_DEV_IDEDOUBLER */
2733 * Look for drive options: "hdx="
2735 if (s
[0] == 'h' && s
[1] == 'd' && s
[2] >= 'a' && s
[2] <= max_drive
) {
2736 const char *hd_words
[] = {"none", "noprobe", "nowerr", "cdrom",
2737 "serialize", "autotune", "noautotune",
2738 "slow", "swapdata", "bswap", "flash",
2739 "remap", "noremap", "scsi", NULL
};
2741 hw
= unit
/ MAX_DRIVES
;
2742 unit
= unit
% MAX_DRIVES
;
2743 hwif
= &ide_hwifs
[hw
];
2744 drive
= &hwif
->drives
[unit
];
2745 if (strncmp(s
+ 4, "ide-", 4) == 0) {
2746 strncpy(drive
->driver_req
, s
+ 4, 9);
2750 * Look for last lun option: "hdxlun="
2752 if (s
[3] == 'l' && s
[4] == 'u' && s
[5] == 'n') {
2753 if (match_parm(&s
[6], NULL
, vals
, 1) != 1)
2755 if (vals
[0] >= 0 && vals
[0] <= 7) {
2756 drive
->last_lun
= vals
[0];
2757 drive
->forced_lun
= 1;
2759 printk(" -- BAD LAST LUN! Expected value from 0 to 7");
2762 switch (match_parm(&s
[3], hd_words
, vals
, 3)) {
2763 case -1: /* "none" */
2764 drive
->nobios
= 1; /* drop into "noprobe" */
2765 case -2: /* "noprobe" */
2768 case -3: /* "nowerr" */
2769 drive
->bad_wstat
= BAD_R_STAT
;
2772 case -4: /* "cdrom" */
2774 drive
->media
= ide_cdrom
;
2777 case -5: /* "serialize" */
2778 printk(" -- USE \"ide%d=serialize\" INSTEAD", hw
);
2780 case -6: /* "autotune" */
2781 drive
->autotune
= 1;
2783 case -7: /* "noautotune" */
2784 drive
->autotune
= 2;
2786 case -8: /* "slow" */
2789 case -9: /* "swapdata" or "bswap" */
2793 case -11: /* "flash" */
2794 drive
->ata_flash
= 1;
2796 case -12: /* "remap" */
2797 drive
->remap_0_to_1
= 1;
2799 case -13: /* "noremap" */
2800 drive
->remap_0_to_1
= 2;
2802 case -14: /* "scsi" */
2803 #if defined(CONFIG_BLK_DEV_IDESCSI) && defined(CONFIG_SCSI)
2809 #endif /* defined(CONFIG_BLK_DEV_IDESCSI) && defined(CONFIG_SCSI) */
2810 case 3: /* cyl,head,sect */
2811 drive
->media
= ide_disk
;
2812 drive
->cyl
= drive
->bios_cyl
= vals
[0];
2813 drive
->head
= drive
->bios_head
= vals
[1];
2814 drive
->sect
= drive
->bios_sect
= vals
[2];
2816 drive
->forced_geom
= 1;
2824 #if defined(CONFIG_BLK_DEV_VIA82CXXX)
2826 * Look for drive option "splitfifo=..."
2829 if (s
[0] == 's' && s
[1] == 'p' && s
[2] == 'l' &&
2830 s
[3] == 'i' && s
[4] == 't' && s
[5] == 'f' &&
2831 s
[6] == 'i' && s
[7] == 'f' && s
[8] == 'o') {
2832 byte tmp
= 0x3a; /* default config byte */
2834 i
= match_parm(&s
[9], NULL
, vals
, 3);
2838 if ((vals
[1] > 0) && (vals
[1] < 5)) {
2839 /* sets threshold for primary Channel: */
2840 byte x
= 4 - vals
[1];
2845 if ((vals
[2] > 0) && (vals
[2] < 5)) {
2846 /* sets threshold for secondary Channel: */
2847 byte x
= 4 - vals
[2];
2853 /* set the FIFO config between channels to 0: */
2855 /* set the needed FIFO config between channels: */
2856 if (vals
[0] == 1) /* primary fifo only */
2858 else if (vals
[0] == 2) /* secondary fifo only */
2860 else if (vals
[0] == 4) /* other shared fifo config */
2862 else if (vals
[0] == 3) /* default config */
2870 /* set the found option in fifoconfig */
2874 #endif /* defined(CONFIG_BLK_DEV_VIA82CXXX) */
2876 if (s
[0] != 'i' || s
[1] != 'd' || s
[2] != 'e')
2879 * Look for bus speed option: "idebus="
2881 if (s
[3] == 'b' && s
[4] == 'u' && s
[5] == 's') {
2882 if (match_parm(&s
[6], NULL
, vals
, 1) != 1)
2884 if (vals
[0] >= 20 && vals
[0] <= 66)
2885 idebus_parameter
= vals
[0];
2887 printk(" -- BAD BUS SPEED! Expected value from 20 to 66");
2891 * Look for interface options: "idex="
2893 if (s
[3] >= '0' && s
[3] <= max_hwif
) {
2895 * Be VERY CAREFUL changing this: note hardcoded indexes below
2896 * -8,-9,-10 : are reserved for future idex calls to ease the hardcoding.
2898 const char *ide_words
[] = {
2899 "noprobe", "serialize", "autotune", "noautotune", "reset", "dma", "ata66",
2900 "minus8", "minus9", "minus10",
2901 "four", "qd6580", "ht6560b", "cmd640_vlb", "dtc2278", "umc8672", "ali14xx", "dc4030", NULL
};
2903 hwif
= &ide_hwifs
[hw
];
2904 i
= match_parm(&s
[4], ide_words
, vals
, 3);
2907 * Cryptic check to ensure chipset not already set for hwif:
2909 if (i
> 0 || i
<= -11) { /* is parameter a chipset name? */
2910 if (hwif
->chipset
!= ide_unknown
)
2911 goto bad_option
; /* chipset already specified */
2912 if (i
<= -11 && i
!= -18 && hw
!= 0)
2913 goto bad_hwif
; /* chipset drivers are for "ide0=" only */
2914 if (i
<= -11 && i
!= -18 && ide_hwifs
[hw
+1].chipset
!= ide_unknown
)
2915 goto bad_option
; /* chipset for 2nd port already specified */
2920 #ifdef CONFIG_BLK_DEV_PDC4030
2921 case -18: /* "dc4030" */
2923 extern void init_pdc4030(void);
2927 #endif /* CONFIG_BLK_DEV_PDC4030 */
2928 #ifdef CONFIG_BLK_DEV_ALI14XX
2929 case -17: /* "ali14xx" */
2931 extern void init_ali14xx (void);
2935 #endif /* CONFIG_BLK_DEV_ALI14XX */
2936 #ifdef CONFIG_BLK_DEV_UMC8672
2937 case -16: /* "umc8672" */
2939 extern void init_umc8672 (void);
2943 #endif /* CONFIG_BLK_DEV_UMC8672 */
2944 #ifdef CONFIG_BLK_DEV_DTC2278
2945 case -15: /* "dtc2278" */
2947 extern void init_dtc2278 (void);
2951 #endif /* CONFIG_BLK_DEV_DTC2278 */
2952 #ifdef CONFIG_BLK_DEV_CMD640
2953 case -14: /* "cmd640_vlb" */
2955 extern int cmd640_vlb
; /* flag for cmd640.c */
2959 #endif /* CONFIG_BLK_DEV_CMD640 */
2960 #ifdef CONFIG_BLK_DEV_HT6560B
2961 case -13: /* "ht6560b" */
2963 extern void init_ht6560b (void);
2967 #endif /* CONFIG_BLK_DEV_HT6560B */
2968 #if CONFIG_BLK_DEV_QD6580
2969 case -12: /* "qd6580" */
2971 extern void init_qd6580 (void);
2975 #endif /* CONFIG_BLK_DEV_QD6580 */
2976 #ifdef CONFIG_BLK_DEV_4DRIVES
2977 case -11: /* "four" drives on one set of ports */
2979 ide_hwif_t
*mate
= &ide_hwifs
[hw
^1];
2980 mate
->drives
[0].select
.all
^= 0x20;
2981 mate
->drives
[1].select
.all
^= 0x20;
2982 hwif
->chipset
= mate
->chipset
= ide_4drives
;
2983 mate
->irq
= hwif
->irq
;
2984 memcpy(mate
->io_ports
, hwif
->io_ports
, sizeof(hwif
->io_ports
));
2987 #endif /* CONFIG_BLK_DEV_4DRIVES */
2988 case -10: /* minus10 */
2989 case -9: /* minus9 */
2990 case -8: /* minus8 */
2992 case -7: /* ata66 */
2993 #ifdef CONFIG_BLK_DEV_IDEPCI
2994 hwif
->udma_four
= 1;
2996 #else /* !CONFIG_BLK_DEV_IDEPCI */
2997 hwif
->udma_four
= 0;
2999 #endif /* CONFIG_BLK_DEV_IDEPCI */
3003 case -5: /* "reset" */
3006 case -4: /* "noautotune" */
3007 hwif
->drives
[0].autotune
= 2;
3008 hwif
->drives
[1].autotune
= 2;
3010 case -3: /* "autotune" */
3011 hwif
->drives
[0].autotune
= 1;
3012 hwif
->drives
[1].autotune
= 1;
3014 case -2: /* "serialize" */
3016 hwif
->mate
= &ide_hwifs
[hw
^1];
3017 hwif
->mate
->mate
= hwif
;
3018 hwif
->serialized
= hwif
->mate
->serialized
= 1;
3021 case -1: /* "noprobe" */
3026 vals
[1] = vals
[0] + 0x206; /* default ctl */
3027 case 2: /* base,ctl */
3028 vals
[2] = 0; /* default irq = probe for it */
3029 case 3: /* base,ctl,irq */
3030 hwif
->hw
.irq
= vals
[2];
3031 ide_init_hwif_ports(&hwif
->hw
, (ide_ioreg_t
) vals
[0], (ide_ioreg_t
) vals
[1], &hwif
->irq
);
3032 memcpy(hwif
->io_ports
, hwif
->hw
.io_ports
, sizeof(hwif
->io_ports
));
3033 hwif
->irq
= vals
[2];
3035 hwif
->chipset
= ide_generic
;
3038 case 0: goto bad_option
;
3040 printk(" -- SUPPORT NOT CONFIGURED IN THIS KERNEL\n");
3045 printk(" -- BAD OPTION\n");
3048 printk("-- NOT SUPPORTED ON ide%d", hw
);
3055 * probe_for_hwifs() finds/initializes "known" IDE interfaces
3057 static void __init
probe_for_hwifs (void)
3062 #ifdef CONFIG_BLK_DEV_IDEPCI
3065 #ifdef CONFIG_BLK_DEV_RZ1000
3067 extern void ide_probe_for_rz100x(void);
3068 ide_probe_for_rz100x();
3070 #endif /* CONFIG_BLK_DEV_RZ1000 */
3071 #endif /* CONFIG_BLK_DEV_IDEPCI */
3073 #endif /* CONFIG_PCI */
3075 #ifdef CONFIG_BLK_DEV_CMD640
3077 extern void ide_probe_for_cmd640x(void);
3078 ide_probe_for_cmd640x();
3080 #endif /* CONFIG_BLK_DEV_CMD640 */
3081 #ifdef CONFIG_BLK_DEV_PDC4030
3083 extern int ide_probe_for_pdc4030(void);
3084 (void) ide_probe_for_pdc4030();
3086 #endif /* CONFIG_BLK_DEV_PDC4030 */
3087 #ifdef CONFIG_BLK_DEV_IDE_PMAC
3089 extern void pmac_ide_probe(void);
3092 #endif /* CONFIG_BLK_DEV_IDE_PMAC */
3093 #ifdef CONFIG_BLK_DEV_IDE_ICSIDE
3095 extern void icside_init(void);
3098 #endif /* CONFIG_BLK_DEV_IDE_ICSIDE */
3099 #ifdef CONFIG_BLK_DEV_IDE_RAPIDE
3101 extern void rapide_init(void);
3104 #endif /* CONFIG_BLK_DEV_IDE_RAPIDE */
3105 #ifdef CONFIG_BLK_DEV_GAYLE
3107 extern void gayle_init(void);
3110 #endif /* CONFIG_BLK_DEV_GAYLE */
3111 #ifdef CONFIG_BLK_DEV_FALCON_IDE
3113 extern void falconide_init(void);
3116 #endif /* CONFIG_BLK_DEV_FALCON_IDE */
3117 #ifdef CONFIG_BLK_DEV_MAC_IDE
3119 extern void macide_init(void);
3122 #endif /* CONFIG_BLK_DEV_MAC_IDE */
3123 #ifdef CONFIG_BLK_DEV_BUDDHA
3125 extern void buddha_init(void);
3128 #endif /* CONFIG_BLK_DEV_BUDDHA */
3131 void __init
ide_init_builtin_drivers (void)
3134 * Probe for special PCI and other "known" interface chipsets
3138 #ifdef CONFIG_BLK_DEV_IDE
3139 #if defined(__mc68000__) || defined(CONFIG_APUS)
3140 if (ide_hwifs
[0].io_ports
[IDE_DATA_OFFSET
]) {
3141 ide_get_lock(&ide_lock
, NULL
, NULL
); /* for atari only */
3142 disable_irq(ide_hwifs
[0].irq
);
3144 #endif /* __mc68000__ || CONFIG_APUS */
3146 (void) ideprobe_init();
3148 #if defined(__mc68000__) || defined(CONFIG_APUS)
3149 if (ide_hwifs
[0].io_ports
[IDE_DATA_OFFSET
]) {
3150 enable_irq(ide_hwifs
[0].irq
);
3151 ide_release_lock(&ide_lock
); /* for atari only */
3153 #endif /* __mc68000__ || CONFIG_APUS */
3154 #endif /* CONFIG_BLK_DEV_IDE */
3156 #ifdef CONFIG_PROC_FS
3161 * Attempt to match drivers for the available drives
3163 #ifdef CONFIG_BLK_DEV_IDEDISK
3164 (void) idedisk_init();
3165 #endif /* CONFIG_BLK_DEV_IDEDISK */
3166 #ifdef CONFIG_BLK_DEV_IDECD
3167 (void) ide_cdrom_init();
3168 #endif /* CONFIG_BLK_DEV_IDECD */
3169 #ifdef CONFIG_BLK_DEV_IDETAPE
3170 (void) idetape_init();
3171 #endif /* CONFIG_BLK_DEV_IDETAPE */
3172 #ifdef CONFIG_BLK_DEV_IDEFLOPPY
3173 (void) idefloppy_init();
3174 #endif /* CONFIG_BLK_DEV_IDEFLOPPY */
3175 #ifdef CONFIG_BLK_DEV_IDESCSI
3177 (void) idescsi_init();
3179 #warning ide scsi-emulation selected but no SCSI-subsystem in kernel
3181 #endif /* CONFIG_BLK_DEV_IDESCSI */
3184 static int default_cleanup (ide_drive_t
*drive
)
3186 return ide_unregister_subdriver(drive
);
3189 static ide_startstop_t
default_do_request(ide_drive_t
*drive
, struct request
*rq
, unsigned long block
)
3191 ide_end_request(0, HWGROUP(drive
));
3195 static void default_end_request (byte uptodate
, ide_hwgroup_t
*hwgroup
)
3197 ide_end_request(uptodate
, hwgroup
);
3200 static int default_ioctl (ide_drive_t
*drive
, struct inode
*inode
, struct file
*file
,
3201 unsigned int cmd
, unsigned long arg
)
3206 static int default_open (struct inode
*inode
, struct file
*filp
, ide_drive_t
*drive
)
3212 static void default_release (struct inode
*inode
, struct file
*filp
, ide_drive_t
*drive
)
3216 static int default_check_media_change (ide_drive_t
*drive
)
3221 static void default_pre_reset (ide_drive_t
*drive
)
3225 static unsigned long default_capacity (ide_drive_t
*drive
)
3227 return 0x7fffffff; /* cdrom or tape */
3230 static ide_startstop_t
default_special (ide_drive_t
*drive
)
3232 special_t
*s
= &drive
->special
;
3235 drive
->mult_req
= 0;
3239 static void setup_driver_defaults (ide_drive_t
*drive
)
3241 ide_driver_t
*d
= drive
->driver
;
3243 if (d
->cleanup
== NULL
) d
->cleanup
= default_cleanup
;
3244 if (d
->do_request
== NULL
) d
->do_request
= default_do_request
;
3245 if (d
->end_request
== NULL
) d
->end_request
= default_end_request
;
3246 if (d
->ioctl
== NULL
) d
->ioctl
= default_ioctl
;
3247 if (d
->open
== NULL
) d
->open
= default_open
;
3248 if (d
->release
== NULL
) d
->release
= default_release
;
3249 if (d
->media_change
== NULL
) d
->media_change
= default_check_media_change
;
3250 if (d
->pre_reset
== NULL
) d
->pre_reset
= default_pre_reset
;
3251 if (d
->capacity
== NULL
) d
->capacity
= default_capacity
;
3252 if (d
->special
== NULL
) d
->special
= default_special
;
3255 ide_drive_t
*ide_scan_devices (byte media
, const char *name
, ide_driver_t
*driver
, int n
)
3257 unsigned int unit
, index
, i
;
3259 for (index
= 0; index
< MAX_HWIFS
; ++index
)
3260 if (ide_hwifs
[index
].present
) goto search
;
3261 ide_init_module(IDE_PROBE_MODULE
);
3263 for (index
= 0, i
= 0; index
< MAX_HWIFS
; ++index
) {
3264 ide_hwif_t
*hwif
= &ide_hwifs
[index
];
3267 for (unit
= 0; unit
< MAX_DRIVES
; ++unit
) {
3268 ide_drive_t
*drive
= &hwif
->drives
[unit
];
3269 char *req
= drive
->driver_req
;
3270 if (*req
&& !strstr(name
, req
))
3272 if (drive
->present
&& drive
->media
== media
&& drive
->driver
== driver
&& ++i
> n
)
3279 int ide_register_subdriver (ide_drive_t
*drive
, ide_driver_t
*driver
, int version
)
3281 unsigned long flags
;
3283 save_flags(flags
); /* all CPUs */
3284 cli(); /* all CPUs */
3285 if (version
!= IDE_SUBDRIVER_VERSION
|| !drive
->present
|| drive
->driver
!= NULL
|| drive
->busy
|| drive
->usage
) {
3286 restore_flags(flags
); /* all CPUs */
3289 drive
->driver
= driver
;
3290 setup_driver_defaults(drive
);
3291 restore_flags(flags
); /* all CPUs */
3292 if (drive
->autotune
!= 2) {
3293 if (driver
->supports_dma
&& HWIF(drive
)->dmaproc
!= NULL
)
3294 (void) (HWIF(drive
)->dmaproc(ide_dma_check
, drive
));
3295 drive
->dsc_overlap
= (drive
->next
!= drive
&& driver
->supports_dsc_overlap
);
3298 drive
->revalidate
= 1;
3299 #ifdef CONFIG_PROC_FS
3300 ide_add_proc_entries(drive
->proc
, generic_subdriver_entries
, drive
);
3301 ide_add_proc_entries(drive
->proc
, driver
->proc
, drive
);
3306 int ide_unregister_subdriver (ide_drive_t
*drive
)
3308 unsigned long flags
;
3310 save_flags(flags
); /* all CPUs */
3311 cli(); /* all CPUs */
3312 if (drive
->usage
|| drive
->busy
|| drive
->driver
== NULL
|| DRIVER(drive
)->busy
) {
3313 restore_flags(flags
); /* all CPUs */
3316 #ifdef CONFIG_PROC_FS
3317 ide_remove_proc_entries(drive
->proc
, DRIVER(drive
)->proc
);
3318 ide_remove_proc_entries(drive
->proc
, generic_subdriver_entries
);
3320 auto_remove_settings(drive
);
3321 drive
->driver
= NULL
;
3322 restore_flags(flags
); /* all CPUs */
3326 int ide_register_module (ide_module_t
*module
)
3328 ide_module_t
*p
= ide_modules
;
3335 module
->next
= ide_modules
;
3336 ide_modules
= module
;
3337 revalidate_drives();
3341 void ide_unregister_module (ide_module_t
*module
)
3345 for (p
= &ide_modules
; (*p
) && (*p
) != module
; p
= &((*p
)->next
));
3350 struct block_device_operations ide_fops
[] = {{
3352 release
: ide_release
,
3354 check_media_change
: ide_check_media_change
,
3355 revalidate
: ide_revalidate_disk
3358 EXPORT_SYMBOL(ide_hwifs
);
3359 EXPORT_SYMBOL(ide_register_module
);
3360 EXPORT_SYMBOL(ide_unregister_module
);
3361 EXPORT_SYMBOL(ide_spin_wait_hwgroup
);
3366 EXPORT_SYMBOL(drive_is_flashcard
);
3367 EXPORT_SYMBOL(ide_timer_expiry
);
3368 EXPORT_SYMBOL(ide_intr
);
3369 EXPORT_SYMBOL(ide_geninit
);
3370 EXPORT_SYMBOL(ide_fops
);
3371 EXPORT_SYMBOL(ide_get_queue
);
3372 EXPORT_SYMBOL(do_ide0_request
);
3373 EXPORT_SYMBOL(ide_add_generic_settings
);
3375 EXPORT_SYMBOL(do_ide1_request
);
3376 #endif /* MAX_HWIFS > 1 */
3378 EXPORT_SYMBOL(do_ide2_request
);
3379 #endif /* MAX_HWIFS > 2 */
3381 EXPORT_SYMBOL(do_ide3_request
);
3382 #endif /* MAX_HWIFS > 3 */
3384 EXPORT_SYMBOL(do_ide4_request
);
3385 #endif /* MAX_HWIFS > 4 */
3387 EXPORT_SYMBOL(do_ide5_request
);
3388 #endif /* MAX_HWIFS > 5 */
3390 EXPORT_SYMBOL(do_ide6_request
);
3391 #endif /* MAX_HWIFS > 6 */
3393 EXPORT_SYMBOL(do_ide7_request
);
3394 #endif /* MAX_HWIFS > 7 */
3396 EXPORT_SYMBOL(do_ide8_request
);
3397 #endif /* MAX_HWIFS > 8 */
3399 EXPORT_SYMBOL(do_ide9_request
);
3400 #endif /* MAX_HWIFS > 9 */
3405 EXPORT_SYMBOL(ide_scan_devices
);
3406 EXPORT_SYMBOL(ide_register_subdriver
);
3407 EXPORT_SYMBOL(ide_unregister_subdriver
);
3408 EXPORT_SYMBOL(ide_replace_subdriver
);
3409 EXPORT_SYMBOL(ide_input_data
);
3410 EXPORT_SYMBOL(ide_output_data
);
3411 EXPORT_SYMBOL(atapi_input_bytes
);
3412 EXPORT_SYMBOL(atapi_output_bytes
);
3413 EXPORT_SYMBOL(ide_set_handler
);
3414 EXPORT_SYMBOL(ide_dump_status
);
3415 EXPORT_SYMBOL(ide_error
);
3416 EXPORT_SYMBOL(ide_fixstring
);
3417 EXPORT_SYMBOL(ide_wait_stat
);
3418 EXPORT_SYMBOL(ide_do_reset
);
3419 EXPORT_SYMBOL(ide_init_drive_cmd
);
3420 EXPORT_SYMBOL(ide_do_drive_cmd
);
3421 EXPORT_SYMBOL(ide_end_drive_cmd
);
3422 EXPORT_SYMBOL(ide_end_request
);
3423 EXPORT_SYMBOL(ide_revalidate_disk
);
3424 EXPORT_SYMBOL(ide_cmd
);
3425 EXPORT_SYMBOL(ide_wait_cmd
);
3426 EXPORT_SYMBOL(ide_delay_50ms
);
3427 EXPORT_SYMBOL(ide_stall_queue
);
3428 #ifdef CONFIG_PROC_FS
3429 EXPORT_SYMBOL(ide_add_proc_entries
);
3430 EXPORT_SYMBOL(ide_remove_proc_entries
);
3431 EXPORT_SYMBOL(proc_ide_read_geometry
);
3432 EXPORT_SYMBOL(create_proc_ide_interfaces
);
3434 EXPORT_SYMBOL(ide_add_setting
);
3435 EXPORT_SYMBOL(ide_remove_setting
);
3437 EXPORT_SYMBOL(ide_register_hw
);
3438 EXPORT_SYMBOL(ide_register
);
3439 EXPORT_SYMBOL(ide_unregister
);
3440 EXPORT_SYMBOL(ide_setup_ports
);
3442 EXPORT_SYMBOL(get_info_ptr
);
3443 EXPORT_SYMBOL(current_capacity
);
3446 * This is gets invoked once during initialization, to set *everything* up
3448 int __init
ide_init (void)
3450 static char banner_printed
= 0;
3452 if (!banner_printed
) {
3453 printk(KERN_INFO
"Uniform Multi-Platform E-IDE driver " REVISION
"\n");
3460 ide_init_builtin_drivers();
3466 static void __init
parse_options (char *line
)
3470 if (line
== NULL
|| !*line
)
3472 while ((line
= next
) != NULL
) {
3473 if ((next
= strchr(line
,' ')) != NULL
)
3475 if (!strncmp(line
,"ide",3) ||
3476 #ifdef CONFIG_BLK_DEV_VIA82CXXX
3477 !strncmp(line
,"splitfifo",9) ||
3478 #endif /* CONFIG_BLK_DEV_VIA82CXXX */
3479 !strncmp(line
,"hdxlun",6) ||
3480 (!strncmp(line
,"hd",2) && line
[2] != '='))
3481 (void) ide_setup(line
);
3486 char *options
= NULL
;
3487 MODULE_PARM(options
,"s");
3489 int init_module (void)
3491 parse_options(options
);
3495 void cleanup_module (void)
3499 for (index
= 0; index
< MAX_HWIFS
; ++index
) {
3500 ide_unregister(index
);
3501 #ifdef CONFIG_BLK_DEV_IDEDMA
3502 if (ide_hwifs
[index
].dma_base
)
3503 (void) ide_release_dma(&ide_hwifs
[index
]);
3504 #endif /* CONFIG_BLK_DEV_IDEDMA */
3506 #ifdef CONFIG_PROC_FS
3513 static int parse_ide_setup (char *line
)
3515 parse_options(line
);
3518 __setup("", parse_ide_setup
);