2 * linux/drivers/block/ide.c Version 6.20 July 10, 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.
110 * Some additional driver compile-time options are in ./include/linux/ide.h
112 * To do, in likely order of completion:
113 * - modify kernel to obtain BIOS geometry for drives on 2nd/3rd/4th i/f
116 #define REVISION "Revision: 6.20"
117 #define VERSION "Id: ide.c 6.20 1999/07/10"
119 #undef REALLY_SLOW_IO /* most systems can safely undef this */
121 #define _IDE_C /* Tell ide.h it's really us */
123 #include <linux/config.h>
124 #include <linux/module.h>
125 #include <linux/types.h>
126 #include <linux/string.h>
127 #include <linux/kernel.h>
128 #include <linux/timer.h>
129 #include <linux/mm.h>
130 #include <linux/interrupt.h>
131 #include <linux/major.h>
132 #include <linux/errno.h>
133 #include <linux/genhd.h>
134 #include <linux/blkpg.h>
135 #include <linux/malloc.h>
136 #include <linux/pci.h>
137 #include <linux/delay.h>
138 #include <linux/ide.h>
140 #include <asm/byteorder.h>
142 #include <asm/uaccess.h>
144 #include <asm/bitops.h>
146 #include "ide_modes.h"
149 #include <linux/kmod.h>
150 #endif /* CONFIG_KMOD */
152 #ifdef CONFIG_BLK_DEV_VIA82CXXX
153 extern byte fifoconfig
; /* defined in via82cxxx.c used by ide_setup() */
154 #endif /* CONFIG_BLK_DEV_VIA82CXXX */
156 static const byte ide_hwif_to_major
[] = { IDE0_MAJOR
, IDE1_MAJOR
,
157 IDE2_MAJOR
, IDE3_MAJOR
,
158 IDE4_MAJOR
, IDE5_MAJOR
,
159 IDE6_MAJOR
, IDE7_MAJOR
,
160 IDE8_MAJOR
, IDE9_MAJOR
};
162 static int idebus_parameter
; /* holds the "idebus=" parameter */
163 static int system_bus_speed
; /* holds what we think is VESA/PCI bus speed */
164 static int initializing
; /* set while initializing built-in drivers */
166 #if defined(__mc68000__) || defined(CONFIG_APUS)
168 * ide_lock is used by the Atari code to obtain access to the IDE interrupt,
169 * which is shared between several drivers.
171 static int ide_lock
= 0;
172 #endif /* __mc68000__ || CONFIG_APUS */
175 * ide_modules keeps track of the available IDE chipset/probe/driver modules.
177 ide_module_t
*ide_modules
= NULL
;
180 * This is declared extern in ide.h, for access by other IDE modules:
182 ide_hwif_t ide_hwifs
[MAX_HWIFS
]; /* master data repository */
184 #if (DISK_RECOVERY_TIME > 0)
186 * For really screwy hardware (hey, at least it *can* be used with Linux)
187 * we can enforce a minimum delay time between successive operations.
189 static unsigned long read_timer(void)
191 unsigned long t
, flags
;
194 __save_flags(flags
); /* local CPU only */
195 __cli(); /* local CPU only */
200 __restore_flags(flags
); /* local CPU only */
203 #endif /* DISK_RECOVERY_TIME */
205 static inline void set_recovery_timer (ide_hwif_t
*hwif
)
207 #if (DISK_RECOVERY_TIME > 0)
208 hwif
->last_time
= read_timer();
209 #endif /* DISK_RECOVERY_TIME */
213 * Do not even *think* about calling this!
215 static void init_hwif_data (unsigned int index
)
219 ide_hwif_t
*hwif
= &ide_hwifs
[index
];
221 /* bulk initialize hwif & drive info with zeros */
222 memset(hwif
, 0, sizeof(ide_hwif_t
));
223 memset(&hw
, 0, sizeof(hw_regs_t
));
225 /* fill in any non-zero initial values */
227 ide_init_hwif_ports(&hw
, ide_default_io_base(index
), 0, &hwif
->irq
);
228 memcpy(&hwif
->hw
, &hw
, sizeof(hw
));
229 memcpy(hwif
->io_ports
, hw
.io_ports
, sizeof(hw
.io_ports
));
230 hwif
->noprobe
= !hwif
->io_ports
[IDE_DATA_OFFSET
];
231 #ifdef CONFIG_BLK_DEV_HD
232 if (hwif
->io_ports
[IDE_DATA_OFFSET
] == HD_DATA
)
233 hwif
->noprobe
= 1; /* may be overridden by ide_setup() */
234 #endif /* CONFIG_BLK_DEV_HD */
235 hwif
->major
= ide_hwif_to_major
[index
];
239 hwif
->name
[3] = '0' + index
;
240 for (unit
= 0; unit
< MAX_DRIVES
; ++unit
) {
241 ide_drive_t
*drive
= &hwif
->drives
[unit
];
243 drive
->media
= ide_disk
;
244 drive
->select
.all
= (unit
<<4)|0xa0;
247 drive
->ready_stat
= READY_STAT
;
248 drive
->bad_wstat
= BAD_W_STAT
;
249 drive
->special
.b
.recalibrate
= 1;
250 drive
->special
.b
.set_geometry
= 1;
251 drive
->name
[0] = 'h';
252 drive
->name
[1] = 'd';
253 drive
->name
[2] = 'a' + (index
* MAX_DRIVES
) + unit
;
254 init_waitqueue_head(&drive
->wqueue
);
259 * init_ide_data() sets reasonable default values into all fields
260 * of all instances of the hwifs and drives, but only on the first call.
261 * Subsequent calls have no effect (they don't wipe out anything).
263 * This routine is normally called at driver initialization time,
264 * but may also be called MUCH earlier during kernel "command-line"
265 * parameter processing. As such, we cannot depend on any other parts
266 * of the kernel (such as memory allocation) to be functioning yet.
268 * This is too bad, as otherwise we could dynamically allocate the
269 * ide_drive_t structs as needed, rather than always consuming memory
270 * for the max possible number (MAX_HWIFS * MAX_DRIVES) of them.
272 #define MAGIC_COOKIE 0x12345678
273 static void init_ide_data (void)
276 static unsigned long magic_cookie
= MAGIC_COOKIE
;
278 if (magic_cookie
!= MAGIC_COOKIE
)
279 return; /* already initialized */
282 /* Initialise all interface structures */
283 for (index
= 0; index
< MAX_HWIFS
; ++index
)
284 init_hwif_data(index
);
286 /* Add default hw interfaces */
287 ide_init_default_hwifs();
289 idebus_parameter
= 0;
290 system_bus_speed
= 0;
294 * CompactFlash cards and their brethern pretend to be removable hard disks, except:
295 * (1) they never have a slave unit, and
296 * (2) they don't have doorlock mechanisms.
297 * This test catches them, and is invoked elsewhere when setting appropriate config bits.
299 * FIXME: This treatment is probably applicable for *all* PCMCIA (PC CARD) devices,
300 * so in linux 2.3.x we should change this to just treat all PCMCIA drives this way,
301 * and get rid of the model-name tests below (too big of an interface change for 2.2.x).
302 * At that time, we might also consider parameterizing the timeouts and retries,
303 * since these are MUCH faster than mechanical drives. -M.Lord
305 int drive_is_flashcard (ide_drive_t
*drive
)
307 struct hd_driveid
*id
= drive
->id
;
309 if (drive
->removable
&& id
!= NULL
) {
310 if (!strncmp(id
->model
, "KODAK ATA_FLASH", 15) /* Kodak */
311 || !strncmp(id
->model
, "Hitachi CV", 10) /* Hitachi */
312 || !strncmp(id
->model
, "SunDisk SDCFB", 13) /* SunDisk */
313 || !strncmp(id
->model
, "HAGIWARA HPC", 12) /* Hagiwara */
314 || !strncmp(id
->model
, "ATA_FLASH", 9)) /* Simple Tech */
316 return 1; /* yes, it is a flash memory card */
319 return 0; /* no, it is not a flash memory card */
323 * ide_system_bus_speed() returns what we think is the system VESA/PCI
324 * bus speed (in MHz). This is used for calculating interface PIO timings.
325 * The default is 40 for known PCI systems, 50 otherwise.
326 * The "idebus=xx" parameter can be used to override this value.
327 * The actual value to be used is computed/displayed the first time through.
329 int ide_system_bus_speed (void)
331 if (!system_bus_speed
) {
332 if (idebus_parameter
)
333 system_bus_speed
= idebus_parameter
; /* user supplied value */
335 else if (pci_present())
336 system_bus_speed
= 40; /* safe default value for PCI */
337 #endif /* CONFIG_PCI */
339 system_bus_speed
= 50; /* safe default value for VESA and PCI */
340 printk("ide: Assuming %dMHz system bus speed for PIO modes%s\n", system_bus_speed
,
341 idebus_parameter
? "" : "; override with idebus=xx");
343 return system_bus_speed
;
348 * Some localbus EIDE interfaces require a special access sequence
349 * when using 32-bit I/O instructions to transfer data. We call this
350 * the "vlb_sync" sequence, which consists of three successive reads
351 * of the sector count register location, with interrupts disabled
352 * to ensure that the reads all happen together.
354 static inline void do_vlb_sync (ide_ioreg_t port
) {
359 #endif /* SUPPORT_VLB_SYNC */
362 * This is used for most PIO data transfers *from* the IDE interface
364 void ide_input_data (ide_drive_t
*drive
, void *buffer
, unsigned int wcount
)
366 byte io_32bit
= drive
->io_32bit
;
372 __save_flags(flags
); /* local CPU only */
373 __cli(); /* local CPU only */
374 do_vlb_sync(IDE_NSECTOR_REG
);
375 insl(IDE_DATA_REG
, buffer
, wcount
);
376 __restore_flags(flags
); /* local CPU only */
378 #endif /* SUPPORT_VLB_SYNC */
379 insl(IDE_DATA_REG
, buffer
, wcount
);
381 #if SUPPORT_SLOW_DATA_PORTS
383 unsigned short *ptr
= (unsigned short *) buffer
;
385 *ptr
++ = inw_p(IDE_DATA_REG
);
386 *ptr
++ = inw_p(IDE_DATA_REG
);
389 #endif /* SUPPORT_SLOW_DATA_PORTS */
390 insw(IDE_DATA_REG
, buffer
, wcount
<<1);
395 * This is used for most PIO data transfers *to* the IDE interface
397 void ide_output_data (ide_drive_t
*drive
, void *buffer
, unsigned int wcount
)
399 byte io_32bit
= drive
->io_32bit
;
405 __save_flags(flags
); /* local CPU only */
406 __cli(); /* local CPU only */
407 do_vlb_sync(IDE_NSECTOR_REG
);
408 outsl(IDE_DATA_REG
, buffer
, wcount
);
409 __restore_flags(flags
); /* local CPU only */
411 #endif /* SUPPORT_VLB_SYNC */
412 outsl(IDE_DATA_REG
, buffer
, wcount
);
414 #if SUPPORT_SLOW_DATA_PORTS
416 unsigned short *ptr
= (unsigned short *) buffer
;
418 outw_p(*ptr
++, IDE_DATA_REG
);
419 outw_p(*ptr
++, IDE_DATA_REG
);
422 #endif /* SUPPORT_SLOW_DATA_PORTS */
423 outsw(IDE_DATA_REG
, buffer
, wcount
<<1);
428 * The following routines are mainly used by the ATAPI drivers.
430 * These routines will round up any request for an odd number of bytes,
431 * so if an odd bytecount is specified, be sure that there's at least one
432 * extra byte allocated for the buffer.
434 void atapi_input_bytes (ide_drive_t
*drive
, void *buffer
, unsigned int bytecount
)
437 #if defined(CONFIG_ATARI) || defined(CONFIG_Q40)
438 if (MACH_IS_ATARI
|| MACH_IS_Q40
) {
439 /* Atari has a byte-swapped IDE interface */
440 insw_swapw(IDE_DATA_REG
, buffer
, bytecount
/ 2);
443 #endif /* CONFIG_ATARI */
444 ide_input_data (drive
, buffer
, bytecount
/ 4);
445 if ((bytecount
& 0x03) >= 2)
446 insw (IDE_DATA_REG
, ((byte
*)buffer
) + (bytecount
& ~0x03), 1);
449 void atapi_output_bytes (ide_drive_t
*drive
, void *buffer
, unsigned int bytecount
)
452 #if defined(CONFIG_ATARI) || defined(CONFIG_Q40)
453 if (MACH_IS_ATARI
|| MACH_IS_Q40
) {
454 /* Atari has a byte-swapped IDE interface */
455 outsw_swapw(IDE_DATA_REG
, buffer
, bytecount
/ 2);
458 #endif /* CONFIG_ATARI */
459 ide_output_data (drive
, buffer
, bytecount
/ 4);
460 if ((bytecount
& 0x03) >= 2)
461 outsw (IDE_DATA_REG
, ((byte
*)buffer
) + (bytecount
& ~0x03), 1);
465 * Needed for PCI irq sharing
467 static inline int drive_is_ready (ide_drive_t
*drive
)
469 if (drive
->waiting_for_dma
)
470 return HWIF(drive
)->dmaproc(ide_dma_test_irq
, drive
);
472 udelay(1); /* need to guarantee 400ns since last command was issued */
474 if (GET_STAT() & BUSY_STAT
)
475 return 0; /* drive busy: definitely not interrupting */
476 return 1; /* drive ready: *might* be interrupting */
480 * This is our end_request replacement function.
482 void ide_end_request(byte uptodate
, ide_hwgroup_t
*hwgroup
)
487 spin_lock_irqsave(&io_request_lock
, flags
);
490 if (!end_that_request_first(rq
, uptodate
, hwgroup
->drive
->name
)) {
491 add_blkdev_randomness(MAJOR(rq
->rq_dev
));
492 hwgroup
->drive
->queue
= rq
->next
;
493 blk_dev
[MAJOR(rq
->rq_dev
)].current_request
= NULL
;
495 end_that_request_last(rq
);
497 spin_unlock_irqrestore(&io_request_lock
, flags
);
501 * The below two are helpers used when modifying the drive timeout.
503 static inline unsigned long set_timeout(ide_drive_t
*drive
, unsigned long timeout
)
505 unsigned long foo
= drive
->timeout
;
506 drive
->timeout
= timeout
;
510 #define restore_timeout(drive, old) (drive->timeout = old)
513 * This should get invoked any time we exit the driver to
514 * wait for an interrupt response from a drive. handler() points
515 * at the appropriate code to handle the next interrupt, and a
516 * timer is started to prevent us from waiting forever in case
517 * something goes wrong (see the ide_timer_expiry() handler later on).
519 void ide_set_handler (ide_drive_t
*drive
, ide_handler_t
*handler
)
522 ide_hwgroup_t
*hwgroup
= HWGROUP(drive
);
524 spin_lock_irqsave(&hwgroup
->spinlock
, flags
);
526 if (hwgroup
->handler
!= NULL
) {
527 printk("%s: ide_set_handler: handler not null; old=%p, new=%p\n",
528 drive
->name
, hwgroup
->handler
, handler
);
531 hwgroup
->handler
= handler
;
532 /* 0 means don't timeout */
533 if (drive
->timeout
&& !timer_pending(&hwgroup
->timer
)) {
534 hwgroup
->timer
.expires
= jiffies
+ drive
->timeout
;
535 add_timer(&(hwgroup
->timer
));
537 spin_unlock_irqrestore(&hwgroup
->spinlock
, flags
);
541 * current_capacity() returns the capacity (in sectors) of a drive
542 * according to its current geometry/LBA settings.
544 unsigned long current_capacity (ide_drive_t
*drive
)
548 if (drive
->driver
!= NULL
)
549 return DRIVER(drive
)->capacity(drive
);
554 * ide_geninit() is called exactly *once* for each major, from genhd.c,
555 * at the beginning of the initial partition check for the drives.
557 void ide_geninit (struct gendisk
*gd
)
560 ide_hwif_t
*hwif
= gd
->real_devices
;
562 for (unit
= 0; unit
< gd
->nr_real
; ++unit
) {
563 ide_drive_t
*drive
= &hwif
->drives
[unit
];
565 drive
->part
[0].nr_sects
= current_capacity(drive
);
566 if (!drive
->present
|| (drive
->media
!= ide_disk
&& drive
->media
!= ide_floppy
) ||
567 drive
->driver
== NULL
|| !drive
->part
[0].nr_sects
)
568 drive
->part
[0].start_sect
= -1; /* skip partition check */
572 static void do_reset1 (ide_drive_t
*, int); /* needed below */
575 * atapi_reset_pollfunc() gets invoked to poll the interface for completion every 50ms
576 * during an atapi drive reset operation. If the drive has not yet responded,
577 * and we have not yet hit our maximum waiting time, then the timer is restarted
580 static void atapi_reset_pollfunc (ide_drive_t
*drive
)
582 ide_hwgroup_t
*hwgroup
= HWGROUP(drive
);
583 unsigned long old_timeout
;
586 SELECT_DRIVE(HWIF(drive
),drive
);
589 if (OK_STAT(stat
=GET_STAT(), 0, BUSY_STAT
)) {
590 printk("%s: ATAPI reset complete\n", drive
->name
);
592 if (0 < (signed long)(hwgroup
->poll_timeout
- jiffies
)) {
593 old_timeout
= set_timeout(drive
, HZ
/ 20);
594 ide_set_handler (drive
, &atapi_reset_pollfunc
);
595 restore_timeout(drive
, old_timeout
);
596 return; /* continue polling */
598 hwgroup
->poll_timeout
= 0; /* end of polling */
599 printk("%s: ATAPI reset timed-out, status=0x%02x\n", drive
->name
, stat
);
600 do_reset1 (drive
, 1); /* do it the old fashioned way */
603 hwgroup
->poll_timeout
= 0; /* done polling */
607 * reset_pollfunc() gets invoked to poll the interface for completion every 50ms
608 * during an ide reset operation. If the drives have not yet responded,
609 * and we have not yet hit our maximum waiting time, then the timer is restarted
612 static void reset_pollfunc (ide_drive_t
*drive
)
614 ide_hwgroup_t
*hwgroup
= HWGROUP(drive
);
615 ide_hwif_t
*hwif
= HWIF(drive
);
616 unsigned long old_timeout
;
619 if (!OK_STAT(tmp
=GET_STAT(), 0, BUSY_STAT
)) {
620 if (0 < (signed long)(hwgroup
->poll_timeout
- jiffies
)) {
621 old_timeout
= set_timeout(drive
, HZ
/ 20);
622 ide_set_handler (drive
, &reset_pollfunc
);
623 restore_timeout(drive
, old_timeout
);
624 return; /* continue polling */
626 printk("%s: reset timed-out, status=0x%02x\n", hwif
->name
, tmp
);
628 printk("%s: reset: ", hwif
->name
);
629 if ((tmp
= GET_ERR()) == 1)
632 #if FANCY_STATUS_DUMPS
634 switch (tmp
& 0x7f) {
635 case 1: printk("passed");
637 case 2: printk("formatter device error");
639 case 3: printk("sector buffer error");
641 case 4: printk("ECC circuitry error");
643 case 5: printk("controlling MPU error");
645 default:printk("error (0x%02x?)", tmp
);
648 printk("; slave: failed");
652 #endif /* FANCY_STATUS_DUMPS */
655 hwgroup
->poll_timeout
= 0; /* done polling */
658 static void pre_reset (ide_drive_t
*drive
)
660 if (!drive
->keep_settings
) {
663 if (drive
->using_dma
)
664 (void) HWIF(drive
)->dmaproc(ide_dma_off
, drive
);
666 if (drive
->driver
!= NULL
)
667 DRIVER(drive
)->pre_reset(drive
);
671 * do_reset1() attempts to recover a confused drive by resetting it.
672 * Unfortunately, resetting a disk drive actually resets all devices on
673 * the same interface, so it can really be thought of as resetting the
674 * interface rather than resetting the drive.
676 * ATAPI devices have their own reset mechanism which allows them to be
677 * individually reset without clobbering other devices on the same interface.
679 * Unfortunately, the IDE interface does not generate an interrupt to let
680 * us know when the reset operation has finished, so we must poll for this.
681 * Equally poor, though, is the fact that this may a very long time to complete,
682 * (up to 30 seconds worstcase). So, instead of busy-waiting here for it,
683 * we set a timer to poll at 50ms intervals.
685 static void do_reset1 (ide_drive_t
*drive
, int do_not_try_atapi
)
689 ide_hwif_t
*hwif
= HWIF(drive
);
690 ide_hwgroup_t
*hwgroup
= HWGROUP(drive
);
691 unsigned long old_timeout
;
693 __save_flags(flags
); /* local CPU only */
694 __cli(); /* local CPU only */
696 /* For an ATAPI device, first try an ATAPI SRST. */
697 if (drive
->media
!= ide_disk
&& !do_not_try_atapi
) {
699 SELECT_DRIVE(hwif
,drive
);
701 OUT_BYTE (WIN_SRST
, IDE_COMMAND_REG
);
702 hwgroup
->poll_timeout
= jiffies
+ WAIT_WORSTCASE
;
703 old_timeout
= set_timeout(drive
, HZ
/ 20);
704 ide_set_handler (drive
, &atapi_reset_pollfunc
);
705 restore_timeout(drive
, old_timeout
);
706 __restore_flags (flags
); /* local CPU only */
711 * First, reset any device state data we were maintaining
712 * for any of the drives on this interface.
714 for (unit
= 0; unit
< MAX_DRIVES
; ++unit
)
715 pre_reset(&hwif
->drives
[unit
]);
717 #if OK_TO_RESET_CONTROLLER
718 if (!IDE_CONTROL_REG
) {
719 __restore_flags(flags
);
723 * Note that we also set nIEN while resetting the device,
724 * to mask unwanted interrupts from the interface during the reset.
725 * However, due to the design of PC hardware, this will cause an
726 * immediate interrupt due to the edge transition it produces.
727 * This single interrupt gives us a "fast poll" for drives that
728 * recover from reset very quickly, saving us the first 50ms wait time.
730 OUT_BYTE(drive
->ctl
|6,IDE_CONTROL_REG
); /* set SRST and nIEN */
731 udelay(10); /* more than enough time */
732 OUT_BYTE(drive
->ctl
|2,IDE_CONTROL_REG
); /* clear SRST, leave nIEN */
733 udelay(10); /* more than enough time */
734 hwgroup
->poll_timeout
= jiffies
+ WAIT_WORSTCASE
;
735 old_timeout
= set_timeout(drive
, HZ
/ 20);
736 ide_set_handler (drive
, &reset_pollfunc
);
737 restore_timeout(drive
, old_timeout
);
740 * Some weird controller like resetting themselves to a strange
741 * state when the disks are reset this way. At least, the Winbond
742 * 553 documentation says that
744 if (hwif
->resetproc
!= NULL
)
745 hwif
->resetproc(drive
);
747 #endif /* OK_TO_RESET_CONTROLLER */
749 __restore_flags (flags
); /* local CPU only */
753 * ide_do_reset() is the entry point to the drive/interface reset code.
755 void ide_do_reset (ide_drive_t
*drive
)
757 do_reset1 (drive
, 0);
761 * Clean up after success/failure of an explicit drive cmd
763 void ide_end_drive_cmd (ide_drive_t
*drive
, byte stat
, byte err
)
766 struct request
*rq
= HWGROUP(drive
)->rq
;
768 if (rq
->cmd
== IDE_DRIVE_CMD
) {
769 byte
*args
= (byte
*) rq
->buffer
;
770 rq
->errors
= !OK_STAT(stat
,READY_STAT
,BAD_STAT
);
774 args
[2] = IN_BYTE(IDE_NSECTOR_REG
);
777 spin_lock_irqsave(&io_request_lock
, flags
);
778 drive
->queue
= rq
->next
;
779 blk_dev
[MAJOR(rq
->rq_dev
)].current_request
= NULL
;
780 HWGROUP(drive
)->rq
= NULL
;
781 rq
->rq_status
= RQ_INACTIVE
;
782 spin_unlock_irqrestore(&io_request_lock
, flags
);
783 save_flags(flags
); /* all CPUs; overkill? */
784 cli(); /* all CPUs; overkill? */
786 up(rq
->sem
); /* inform originator that rq has been serviced */
787 restore_flags(flags
); /* all CPUs; overkill? */
791 * Error reporting, in human readable form (luxurious, but a memory hog).
793 byte
ide_dump_status (ide_drive_t
*drive
, const char *msg
, byte stat
)
798 __save_flags (flags
); /* local CPU only */
799 ide__sti(); /* local CPU only */
800 printk("%s: %s: status=0x%02x", drive
->name
, msg
, stat
);
801 #if FANCY_STATUS_DUMPS
803 if (stat
& BUSY_STAT
)
806 if (stat
& READY_STAT
) printk("DriveReady ");
807 if (stat
& WRERR_STAT
) printk("DeviceFault ");
808 if (stat
& SEEK_STAT
) printk("SeekComplete ");
809 if (stat
& DRQ_STAT
) printk("DataRequest ");
810 if (stat
& ECC_STAT
) printk("CorrectedError ");
811 if (stat
& INDEX_STAT
) printk("Index ");
812 if (stat
& ERR_STAT
) printk("Error ");
815 #endif /* FANCY_STATUS_DUMPS */
817 if ((stat
& (BUSY_STAT
|ERR_STAT
)) == ERR_STAT
) {
819 printk("%s: %s: error=0x%02x", drive
->name
, msg
, err
);
820 #if FANCY_STATUS_DUMPS
821 if (drive
->media
== ide_disk
) {
823 if (err
& ABRT_ERR
) printk("DriveStatusError ");
824 if (err
& ICRC_ERR
) printk((err
& ABRT_ERR
) ? "BadCRC " : "BadSector ");
825 if (err
& ECC_ERR
) printk("UncorrectableError ");
826 if (err
& ID_ERR
) printk("SectorIdNotFound ");
827 if (err
& TRK0_ERR
) printk("TrackZeroNotFound ");
828 if (err
& MARK_ERR
) printk("AddrMarkNotFound ");
830 if ((err
& (BBD_ERR
| ABRT_ERR
)) == BBD_ERR
|| (err
& (ECC_ERR
|ID_ERR
|MARK_ERR
))) {
831 byte cur
= IN_BYTE(IDE_SELECT_REG
);
832 if (cur
& 0x40) { /* using LBA? */
833 printk(", LBAsect=%ld", (unsigned long)
835 |(IN_BYTE(IDE_HCYL_REG
)<<16)
836 |(IN_BYTE(IDE_LCYL_REG
)<<8)
837 | IN_BYTE(IDE_SECTOR_REG
));
839 printk(", CHS=%d/%d/%d",
840 (IN_BYTE(IDE_HCYL_REG
)<<8) +
841 IN_BYTE(IDE_LCYL_REG
),
843 IN_BYTE(IDE_SECTOR_REG
));
845 if (HWGROUP(drive
)->rq
)
846 printk(", sector=%ld", HWGROUP(drive
)->rq
->sector
);
849 #endif /* FANCY_STATUS_DUMPS */
852 __restore_flags (flags
); /* local CPU only */
857 * try_to_flush_leftover_data() is invoked in response to a drive
858 * unexpectedly having its DRQ_STAT bit set. As an alternative to
859 * resetting the drive, this routine tries to clear the condition
860 * by read a sector's worth of data from the drive. Of course,
861 * this may not help if the drive is *waiting* for data from *us*.
863 static void try_to_flush_leftover_data (ide_drive_t
*drive
)
865 int i
= (drive
->mult_count
? drive
->mult_count
: 1) * SECTOR_WORDS
;
867 if (drive
->media
!= ide_disk
)
870 unsigned long buffer
[16];
871 unsigned int wcount
= (i
> 16) ? 16 : i
;
873 ide_input_data (drive
, buffer
, wcount
);
878 * ide_error() takes action based on the error returned by the drive.
880 void ide_error (ide_drive_t
*drive
, const char *msg
, byte stat
)
885 err
= ide_dump_status(drive
, msg
, stat
);
886 if (drive
== NULL
|| (rq
= HWGROUP(drive
)->rq
) == NULL
)
888 /* retry only "normal" I/O: */
889 if (rq
->cmd
== IDE_DRIVE_CMD
) {
891 ide_end_drive_cmd(drive
, stat
, err
);
894 if (stat
& BUSY_STAT
|| ((stat
& WRERR_STAT
) && !drive
->nowerr
)) { /* other bits are useless when BUSY */
895 rq
->errors
|= ERROR_RESET
;
897 if (drive
->media
== ide_disk
&& (stat
& ERR_STAT
)) {
898 /* err has different meaning on cdrom and tape */
899 if (err
== ABRT_ERR
) {
900 if (drive
->select
.b
.lba
&& IN_BYTE(IDE_COMMAND_REG
) == WIN_SPECIFY
)
901 return; /* some newer drives don't support WIN_SPECIFY */
902 } else if ((err
& (ABRT_ERR
| ICRC_ERR
)) == (ABRT_ERR
| ICRC_ERR
))
903 ; /* UDMA crc error -- just retry the operation */
904 else if (err
& (BBD_ERR
| ECC_ERR
)) /* retries won't help these */
905 rq
->errors
= ERROR_MAX
;
906 else if (err
& TRK0_ERR
) /* help it find track zero */
907 rq
->errors
|= ERROR_RECAL
;
909 if ((stat
& DRQ_STAT
) && rq
->cmd
!= WRITE
)
910 try_to_flush_leftover_data(drive
);
912 if (GET_STAT() & (BUSY_STAT
|DRQ_STAT
))
913 rq
->errors
|= ERROR_RESET
; /* Mmmm.. timing problem */
915 if (rq
->errors
>= ERROR_MAX
) {
916 if (drive
->driver
!= NULL
)
917 DRIVER(drive
)->end_request(0, HWGROUP(drive
));
919 ide_end_request(0, HWGROUP(drive
));
921 if ((rq
->errors
& ERROR_RESET
) == ERROR_RESET
) {
925 } else if ((rq
->errors
& ERROR_RECAL
) == ERROR_RECAL
)
926 drive
->special
.b
.recalibrate
= 1;
932 * Issue a simple drive command
933 * The drive must be selected beforehand.
935 void ide_cmd(ide_drive_t
*drive
, byte cmd
, byte nsect
, ide_handler_t
*handler
)
937 ide_set_handler (drive
, handler
);
939 OUT_BYTE(drive
->ctl
,IDE_CONTROL_REG
); /* clear nIEN */
940 OUT_BYTE(nsect
,IDE_NSECTOR_REG
);
941 OUT_BYTE(cmd
,IDE_COMMAND_REG
);
945 * drive_cmd_intr() is invoked on completion of a special DRIVE_CMD.
947 static void drive_cmd_intr (ide_drive_t
*drive
)
949 struct request
*rq
= HWGROUP(drive
)->rq
;
950 byte
*args
= (byte
*) rq
->buffer
;
951 byte stat
= GET_STAT();
954 ide__sti(); /* local CPU only */
955 if ((stat
& DRQ_STAT
) && args
&& args
[3]) {
956 byte io_32bit
= drive
->io_32bit
;
958 ide_input_data(drive
, &args
[4], args
[3] * SECTOR_WORDS
);
959 drive
->io_32bit
= io_32bit
;
960 while (((stat
= GET_STAT()) & BUSY_STAT
) && retries
--)
964 if (OK_STAT(stat
, READY_STAT
, BAD_STAT
))
965 ide_end_drive_cmd (drive
, stat
, GET_ERR());
967 ide_error(drive
, "drive_cmd", stat
); /* calls ide_end_drive_cmd */
971 * do_special() is used to issue WIN_SPECIFY, WIN_RESTORE, and WIN_SETMULT
972 * commands to a drive. It used to do much more, but has been scaled back.
974 static inline void do_special (ide_drive_t
*drive
)
976 special_t
*s
= &drive
->special
;
979 printk("%s: do_special: 0x%02x\n", drive
->name
, s
->all
);
982 ide_tuneproc_t
*tuneproc
= HWIF(drive
)->tuneproc
;
984 if (tuneproc
!= NULL
)
985 tuneproc(drive
, drive
->tune_req
);
986 } else if (drive
->driver
!= NULL
) {
987 DRIVER(drive
)->special(drive
);
989 printk("%s: bad special flag: 0x%02x\n", drive
->name
, s
->all
);
995 * This routine busy-waits for the drive status to be not "busy".
996 * It then checks the status for all of the "good" bits and none
997 * of the "bad" bits, and if all is okay it returns 0. All other
998 * cases return 1 after invoking ide_error() -- caller should just return.
1000 * This routine should get fixed to not hog the cpu during extra long waits..
1001 * That could be done by busy-waiting for the first jiffy or two, and then
1002 * setting a timer to wake up at half second intervals thereafter,
1003 * until timeout is achieved, before timing out.
1005 int ide_wait_stat (ide_drive_t
*drive
, byte good
, byte bad
, unsigned long timeout
)
1009 unsigned long flags
;
1011 udelay(1); /* spec allows drive 400ns to assert "BUSY" */
1012 if ((stat
= GET_STAT()) & BUSY_STAT
) {
1013 __save_flags(flags
); /* local CPU only */
1014 ide__sti(); /* local CPU only */
1016 while ((stat
= GET_STAT()) & BUSY_STAT
) {
1017 if (0 < (signed long)(jiffies
- timeout
)) {
1018 __restore_flags(flags
); /* local CPU only */
1019 ide_error(drive
, "status timeout", stat
);
1023 __restore_flags(flags
); /* local CPU only */
1026 * Allow status to settle, then read it again.
1027 * A few rare drives vastly violate the 400ns spec here,
1028 * so we'll wait up to 10usec for a "good" status
1029 * rather than expensively fail things immediately.
1030 * This fix courtesy of Matthew Faupel & Niccolo Rigacci.
1032 for (i
= 0; i
< 10; i
++) {
1034 if (OK_STAT((stat
= GET_STAT()), good
, bad
))
1037 ide_error(drive
, "status error", stat
);
1042 * execute_drive_cmd() issues a special drive command,
1043 * usually initiated by ioctl() from the external hdparm program.
1045 static void execute_drive_cmd (ide_drive_t
*drive
, struct request
*rq
)
1047 byte
*args
= rq
->buffer
;
1050 printk("%s: DRIVE_CMD cmd=0x%02x sc=0x%02x fr=0x%02x xx=0x%02x\n",
1051 drive
->name
, args
[0], args
[1], args
[2], args
[3]);
1053 if (args
[0] == WIN_SMART
) {
1054 OUT_BYTE(0x4f, IDE_LCYL_REG
);
1055 OUT_BYTE(0xc2, IDE_HCYL_REG
);
1056 OUT_BYTE(args
[2],IDE_FEATURE_REG
);
1057 OUT_BYTE(args
[1],IDE_SECTOR_REG
);
1058 ide_cmd(drive
, args
[0], args
[3], &drive_cmd_intr
);
1061 OUT_BYTE(args
[2],IDE_FEATURE_REG
);
1062 ide_cmd(drive
, args
[0], args
[1], &drive_cmd_intr
);
1066 * NULL is actually a valid way of waiting for
1067 * all current requests to be flushed from the queue.
1070 printk("%s: DRIVE_CMD (null)\n", drive
->name
);
1072 ide_end_drive_cmd(drive
, GET_STAT(), GET_ERR());
1078 * start_request() initiates handling of a new I/O request
1080 static inline void start_request (ide_drive_t
*drive
)
1082 unsigned long block
, blockend
;
1083 struct request
*rq
= drive
->queue
;
1084 unsigned int minor
= MINOR(rq
->rq_dev
), unit
= minor
>> PARTN_BITS
;
1085 ide_hwif_t
*hwif
= HWIF(drive
);
1087 ide__sti(); /* local CPU only */
1089 printk("%s: start_request: current=0x%08lx\n", hwif
->name
, (unsigned long) rq
);
1091 if (unit
>= MAX_DRIVES
) {
1092 printk("%s: bad device number: %s\n", hwif
->name
, kdevname(rq
->rq_dev
));
1096 if (rq
->bh
&& !buffer_locked(rq
->bh
)) {
1097 printk("%s: block not locked\n", drive
->name
);
1102 blockend
= block
+ rq
->nr_sectors
;
1103 if ((blockend
< block
) || (blockend
> drive
->part
[minor
&PARTN_MASK
].nr_sects
)) {
1104 printk("%s%c: bad access: block=%ld, count=%ld\n", drive
->name
,
1105 (minor
&PARTN_MASK
)?'0'+(minor
&PARTN_MASK
):' ', block
, rq
->nr_sectors
);
1108 block
+= drive
->part
[minor
&PARTN_MASK
].start_sect
+ drive
->sect0
;
1110 /* Yecch - this will shift the entire interval,
1111 possibly killing some innocent following sector */
1112 if (block
== 0 && drive
->remap_0_to_1
== 1)
1113 block
= 1; /* redirect MBR access to EZ-Drive partn table */
1115 #if (DISK_RECOVERY_TIME > 0)
1116 while ((read_timer() - hwif
->last_time
) < DISK_RECOVERY_TIME
);
1119 SELECT_DRIVE(hwif
, drive
);
1120 if (ide_wait_stat(drive
, drive
->ready_stat
, BUSY_STAT
|DRQ_STAT
, WAIT_READY
)) {
1121 printk("%s: drive not ready for command\n", drive
->name
);
1124 if (!drive
->special
.all
) {
1125 if (rq
->cmd
== IDE_DRIVE_CMD
) {
1126 execute_drive_cmd(drive
, rq
);
1129 if (drive
->driver
!= NULL
) {
1130 DRIVER(drive
)->do_request(drive
, rq
, block
);
1133 printk("%s: media type %d not supported\n", drive
->name
, drive
->media
);
1139 if (drive
->driver
!= NULL
)
1140 DRIVER(drive
)->end_request(0, HWGROUP(drive
));
1142 ide_end_request(0, HWGROUP(drive
));
1146 * ide_stall_queue() can be used by a drive to give excess bandwidth back
1147 * to the hwgroup by sleeping for timeout jiffies.
1149 void ide_stall_queue (ide_drive_t
*drive
, unsigned long timeout
)
1151 if (timeout
> WAIT_WORSTCASE
)
1152 timeout
= WAIT_WORSTCASE
;
1153 drive
->sleep
= timeout
+ jiffies
;
1156 #define WAKEUP(drive) ((drive)->service_start + 2 * (drive)->service_time)
1159 * choose_drive() selects the next drive which will be serviced.
1161 static inline ide_drive_t
*choose_drive (ide_hwgroup_t
*hwgroup
)
1163 ide_drive_t
*drive
, *best
;
1167 drive
= hwgroup
->drive
;
1169 if (drive
->queue
&& (!drive
->sleep
|| 0 <= (signed long)(jiffies
- drive
->sleep
))) {
1171 || (drive
->sleep
&& (!best
->sleep
|| 0 < (signed long)(best
->sleep
- drive
->sleep
)))
1172 || (!best
->sleep
&& 0 < (signed long)(WAKEUP(best
) - WAKEUP(drive
))))
1174 struct blk_dev_struct
*bdev
= &blk_dev
[HWIF(drive
)->major
];
1175 if (bdev
->current_request
!= &bdev
->plug
)
1179 } while ((drive
= drive
->next
) != hwgroup
->drive
);
1180 if (best
&& best
->nice1
&& !best
->sleep
&& best
!= hwgroup
->drive
&& best
->service_time
> WAIT_MIN_SLEEP
) {
1181 long t
= (signed long)(WAKEUP(best
) - jiffies
);
1182 if (t
>= WAIT_MIN_SLEEP
) {
1184 * We *may* have some time to spare, but first let's see if
1185 * someone can potentially benefit from our nice mood today..
1190 && 0 < (signed long)(WAKEUP(drive
) - (jiffies
- best
->service_time
))
1191 && 0 < (signed long)((jiffies
+ t
) - WAKEUP(drive
)))
1193 ide_stall_queue(best
, IDE_MIN(t
, 10 * WAIT_MIN_SLEEP
));
1196 } while ((drive
= drive
->next
) != best
);
1203 * Caller must have already acquired spinlock using *spinflags
1205 static void ide_do_request (ide_hwgroup_t
*hwgroup
, unsigned long *hwgroup_flags
, int masked_irq
)
1207 struct blk_dev_struct
*bdev
;
1210 unsigned long io_flags
;
1213 while (hwgroup
->handler
== NULL
) {
1214 spin_lock_irqsave(&io_request_lock
, io_flags
);
1215 drive
= choose_drive(hwgroup
);
1216 if (drive
== NULL
) {
1217 unsigned long sleep
= 0;
1220 drive
= hwgroup
->drive
;
1222 bdev
= &blk_dev
[HWIF(drive
)->major
];
1223 if (bdev
->current_request
!= &bdev
->plug
) /* FIXME: this will do for now */
1224 bdev
->current_request
= NULL
; /* (broken since patch-2.1.15) */
1225 if (drive
->sleep
&& (!sleep
|| 0 < (signed long)(sleep
- drive
->sleep
)))
1226 sleep
= drive
->sleep
;
1227 } while ((drive
= drive
->next
) != hwgroup
->drive
);
1228 spin_unlock_irqrestore(&io_request_lock
, io_flags
);
1230 if (0 < (signed long)(jiffies
+ WAIT_MIN_SLEEP
- sleep
))
1231 sleep
= jiffies
+ WAIT_MIN_SLEEP
;
1233 if (hwgroup
->timer
.next
|| hwgroup
->timer
.prev
)
1234 printk("ide_set_handler: timer already active\n");
1236 mod_timer(&hwgroup
->timer
, sleep
);
1238 /* Ugly, but how can we sleep for the lock otherwise? perhaps from tq_scheduler? */
1239 ide_release_lock(&ide_lock
); /* for atari only */
1245 if (hwgroup
->hwif
->sharing_irq
&& hwif
!= hwgroup
->hwif
&&
1246 hwif
->io_ports
[IDE_CONTROL_OFFSET
])
1247 /* set nIEN for previous hwif */
1248 OUT_BYTE(hwgroup
->drive
->ctl
|2, hwgroup
->hwif
->io_ports
[IDE_CONTROL_OFFSET
]);
1249 hwgroup
->hwif
= hwif
;
1250 hwgroup
->drive
= drive
;
1252 drive
->service_start
= jiffies
;
1254 bdev
= &blk_dev
[hwif
->major
];
1255 if (bdev
->current_request
== &bdev
->plug
) /* FIXME: paranoia */
1256 printk("%s: Huh? nuking plugged queue\n", drive
->name
);
1257 bdev
->current_request
= hwgroup
->rq
= drive
->queue
;
1258 spin_unlock_irqrestore(&io_request_lock
, io_flags
);
1261 if (hwif
->irq
!= masked_irq
)
1262 disable_irq_nosync(hwif
->irq
);
1263 spin_unlock_irqrestore(&hwgroup
->spinlock
, *hwgroup_flags
);
1264 start_request(drive
);
1265 spin_lock_irqsave(&hwgroup
->spinlock
, *hwgroup_flags
);
1266 if (hwif
->irq
!= masked_irq
)
1267 enable_irq(hwif
->irq
);
1270 if (masked_irq
&& hwif
->irq
!= masked_irq
) {
1271 printk("%s: (disable_irq) %smasked_irq %d\n",
1273 masked_irq
? "" : "un_", hwif
->irq
);
1276 disable_irq(hwif
->irq
);
1278 disable_irq_nosync(hwif
->irq
);
1281 spin_unlock_irqrestore(&hwgroup
->spinlock
, *hwgroup_flags
);
1282 start_request(drive
);
1283 spin_lock_irqsave(&hwgroup
->spinlock
, *hwgroup_flags
);
1284 if (masked_irq
&& hwif
->irq
!= masked_irq
) {
1285 printk("%s: (enable_irq) %smasked_irq %d\n",
1287 masked_irq
? "" : "un_", hwif
->irq
);
1288 enable_irq(hwif
->irq
);
1295 * ide_get_queue() returns the queue which corresponds to a given device.
1297 struct request
**ide_get_queue (kdev_t dev
)
1299 ide_hwif_t
*hwif
= (ide_hwif_t
*)blk_dev
[MAJOR(dev
)].data
;
1301 return &hwif
->drives
[DEVICE_NR(dev
) & 1].queue
;
1305 * do_hwgroup_request() invokes ide_do_request() after claiming hwgroup->busy.
1307 static void do_hwgroup_request (ide_hwgroup_t
*hwgroup
)
1309 unsigned long flags
;
1311 spin_lock_irqsave(&hwgroup
->spinlock
, flags
);
1312 if (hwgroup
->busy
) {
1313 spin_unlock_irqrestore(&hwgroup
->spinlock
, flags
);
1316 del_timer(&hwgroup
->timer
);
1317 ide_get_lock(&ide_lock
, ide_intr
, hwgroup
); /* for atari only */
1318 ide_do_request(hwgroup
, &flags
, 0);
1319 spin_unlock_irqrestore(&hwgroup
->spinlock
, flags
);
1323 * ll_rw_blk.c invokes our do_idex_request() function
1324 * with the io_request_spinlock already grabbed.
1325 * Since we need to do our own spinlock's internally,
1326 * on paths that don't necessarily originate through the
1327 * do_idex_request() path, we have to undo the spinlock on entry,
1328 * and restore it again on exit.
1329 * Fortunately, this is mostly a nop for non-SMP kernels.
1331 static inline void unlock_do_hwgroup_request (ide_hwgroup_t
*hwgroup
)
1333 spin_unlock(&io_request_lock
);
1334 do_hwgroup_request (hwgroup
);
1335 spin_lock_irq(&io_request_lock
);
1338 void do_ide0_request (void)
1340 unlock_do_hwgroup_request (ide_hwifs
[0].hwgroup
);
1344 void do_ide1_request (void)
1346 unlock_do_hwgroup_request (ide_hwifs
[1].hwgroup
);
1348 #endif /* MAX_HWIFS > 1 */
1351 void do_ide2_request (void)
1353 unlock_do_hwgroup_request (ide_hwifs
[2].hwgroup
);
1355 #endif /* MAX_HWIFS > 2 */
1358 void do_ide3_request (void)
1360 unlock_do_hwgroup_request (ide_hwifs
[3].hwgroup
);
1362 #endif /* MAX_HWIFS > 3 */
1365 void do_ide4_request (void)
1367 unlock_do_hwgroup_request (ide_hwifs
[4].hwgroup
);
1369 #endif /* MAX_HWIFS > 4 */
1372 void do_ide5_request (void)
1374 unlock_do_hwgroup_request (ide_hwifs
[5].hwgroup
);
1376 #endif /* MAX_HWIFS > 5 */
1379 void do_ide6_request (void)
1381 unlock_do_hwgroup_request (ide_hwifs
[6].hwgroup
);
1383 #endif /* MAX_HWIFS > 6 */
1386 void do_ide7_request (void)
1388 unlock_do_hwgroup_request (ide_hwifs
[7].hwgroup
);
1390 #endif /* MAX_HWIFS > 7 */
1393 void do_ide8_request (void)
1395 unlock_do_hwgroup_request (ide_hwifs
[8].hwgroup
);
1397 #endif /* MAX_HWIFS > 8 */
1400 void do_ide9_request (void)
1402 unlock_do_hwgroup_request (ide_hwifs
[9].hwgroup
);
1404 #endif /* MAX_HWIFS > 9 */
1406 static void start_next_request (ide_hwgroup_t
*hwgroup
, int masked_irq
)
1408 unsigned long flags
;
1411 spin_lock_irqsave(&hwgroup
->spinlock
, flags
);
1412 if (hwgroup
->handler
!= NULL
) {
1413 spin_unlock_irqrestore(&hwgroup
->spinlock
, flags
);
1416 drive
= hwgroup
->drive
;
1417 set_recovery_timer(HWIF(drive
));
1418 drive
->service_time
= jiffies
- drive
->service_start
;
1419 ide_do_request(hwgroup
, &flags
, masked_irq
);
1420 spin_unlock_irqrestore(&hwgroup
->spinlock
, flags
);
1423 void ide_timer_expiry (unsigned long data
)
1425 ide_hwgroup_t
*hwgroup
= (ide_hwgroup_t
*) data
;
1427 ide_handler_t
*handler
;
1428 unsigned long flags
;
1430 spin_lock_irqsave(&hwgroup
->spinlock
, flags
);
1431 drive
= hwgroup
->drive
;
1432 if ((handler
= hwgroup
->handler
) == NULL
) {
1433 spin_unlock_irqrestore(&hwgroup
->spinlock
, flags
);
1434 do_hwgroup_request(hwgroup
);
1437 hwgroup
->busy
= 1; /* should already be "1" */
1438 hwgroup
->handler
= NULL
;
1439 /* polling in progress or just don't timeout */
1440 if (hwgroup
->poll_timeout
!= 0) {
1441 spin_unlock_irqrestore(&hwgroup
->spinlock
, flags
);
1443 } else if (drive_is_ready(drive
)) {
1444 printk("%s: lost interrupt\n", drive
->name
);
1445 (void) hwgroup
->hwif
->dmaproc(ide_dma_lostirq
, drive
);
1446 spin_unlock_irqrestore(&hwgroup
->spinlock
, flags
);
1449 if (drive
->waiting_for_dma
) {
1450 (void) hwgroup
->hwif
->dmaproc(ide_dma_end
, drive
);
1451 printk("%s: timeout waiting for DMA\n", drive
->name
);
1453 * need something here for HPT34X.......AMH
1454 * irq timeout: status=0x58 { DriveReady SeekComplete DataRequest }
1456 (void) hwgroup
->hwif
->dmaproc(ide_dma_timeout
, drive
);
1458 spin_unlock_irqrestore(&hwgroup
->spinlock
, flags
);
1459 ide_error(drive
, "irq timeout", GET_STAT());
1461 start_next_request(hwgroup
, 0);
1465 * There's nothing really useful we can do with an unexpected interrupt,
1466 * other than reading the status register (to clear it), and logging it.
1467 * There should be no way that an irq can happen before we're ready for it,
1468 * so we needn't worry much about losing an "important" interrupt here.
1470 * On laptops (and "green" PCs), an unexpected interrupt occurs whenever the
1471 * drive enters "idle", "standby", or "sleep" mode, so if the status looks
1472 * "good", we just ignore the interrupt completely.
1474 * This routine assumes __cli() is in effect when called.
1476 * If an unexpected interrupt happens on irq15 while we are handling irq14
1477 * and if the two interfaces are "serialized" (CMD640), then it looks like
1478 * we could screw up by interfering with a new request being set up for irq15.
1480 * In reality, this is a non-issue. The new command is not sent unless the
1481 * drive is ready to accept one, in which case we know the drive is not
1482 * trying to interrupt us. And ide_set_handler() is always invoked before
1483 * completing the issuance of any new drive command, so we will not be
1484 * accidently invoked as a result of any valid command completion interrupt.
1487 static void unexpected_intr (int irq
, ide_hwgroup_t
*hwgroup
)
1490 ide_hwif_t
*hwif
= hwgroup
->hwif
;
1493 * handle the unexpected interrupt
1496 if (hwif
->irq
== irq
) {
1497 stat
= IN_BYTE(hwif
->io_ports
[IDE_STATUS_OFFSET
]);
1498 if (!OK_STAT(stat
, READY_STAT
, BAD_STAT
)) {
1499 /* Try to not flood the console with msgs */
1500 static unsigned long last_msgtime
= 0, count
= 0;
1502 if (0 < (signed long)(jiffies
- (last_msgtime
+ HZ
))) {
1503 last_msgtime
= jiffies
;
1504 printk("%s%s: unexpected interrupt, status=0x%02x, count=%ld\n",
1505 hwif
->name
, (hwif
->next
== hwgroup
->hwif
) ? "" : "(?)", stat
, count
);
1509 } while ((hwif
= hwif
->next
) != hwgroup
->hwif
);
1512 * entry point for all interrupts, caller does __cli() for us
1514 void ide_intr (int irq
, void *dev_id
, struct pt_regs
*regs
)
1516 unsigned long flags
;
1517 ide_hwgroup_t
*hwgroup
= (ide_hwgroup_t
*)dev_id
;
1520 ide_handler_t
*handler
;
1522 __cli(); /* local CPU only */
1523 spin_lock_irqsave(&hwgroup
->spinlock
, flags
);
1524 hwif
= hwgroup
->hwif
;
1526 if (!ide_ack_intr(hwif
)) {
1527 spin_unlock_irqrestore(&hwgroup
->spinlock
, flags
);
1531 if ((handler
= hwgroup
->handler
) == NULL
|| hwgroup
->poll_timeout
!= 0) {
1533 * Not expecting an interrupt from this drive.
1534 * That means this could be:
1535 * (1) an interrupt from another PCI device
1536 * sharing the same PCI INT# as us.
1537 * or (2) a drive just entered sleep or standby mode,
1538 * and is interrupting to let us know.
1539 * or (3) a spurious interrupt of unknown origin.
1541 * For PCI, we cannot tell the difference,
1542 * so in that case we just ignore it and hope it goes away.
1544 #ifdef CONFIG_BLK_DEV_IDEPCI
1545 if (IDE_PCI_DEVID_EQ(hwif
->pci_devid
, IDE_PCI_DEVID_NULL
))
1546 #endif /* CONFIG_BLK_DEV_IDEPCI */
1549 * Probably not a shared PCI interrupt,
1550 * so we can safely try to do something about it:
1552 unexpected_intr(irq
, hwgroup
);
1554 spin_unlock_irqrestore(&hwgroup
->spinlock
, flags
);
1557 drive
= hwgroup
->drive
;
1558 if (!drive
|| !drive_is_ready(drive
)) {
1559 spin_unlock_irqrestore(&hwgroup
->spinlock
, flags
);
1562 hwgroup
->handler
= NULL
;
1563 del_timer(&(hwgroup
->timer
));
1564 spin_unlock_irqrestore(&hwgroup
->spinlock
, flags
);
1566 ide__sti(); /* local CPU only */
1567 handler(drive
); /* service this interrupt, may set handler for next interrupt */
1569 * Note that handler() may have set things up for another
1570 * interrupt to occur soon, but it cannot happen until
1571 * we exit from this routine, because it will be the
1572 * same irq as is currently being serviced here,
1573 * and Linux won't allow another (on any CPU) until we return.
1575 start_next_request(hwgroup
, hwif
->irq
);
1579 * get_info_ptr() returns the (ide_drive_t *) for a given device number.
1580 * It returns NULL if the given device number does not match any present drives.
1582 ide_drive_t
*get_info_ptr (kdev_t i_rdev
)
1584 int major
= MAJOR(i_rdev
);
1587 for (h
= 0; h
< MAX_HWIFS
; ++h
) {
1588 ide_hwif_t
*hwif
= &ide_hwifs
[h
];
1589 if (hwif
->present
&& major
== hwif
->major
) {
1590 unsigned unit
= DEVICE_NR(i_rdev
);
1591 if (unit
< MAX_DRIVES
) {
1592 ide_drive_t
*drive
= &hwif
->drives
[unit
];
1603 * This function is intended to be used prior to invoking ide_do_drive_cmd().
1605 void ide_init_drive_cmd (struct request
*rq
)
1608 rq
->cmd
= IDE_DRIVE_CMD
;
1611 rq
->current_nr_sectors
= 0;
1619 * This function issues a special IDE device request
1620 * onto the request queue.
1622 * If action is ide_wait, then the rq is queued at the end of the
1623 * request queue, and the function sleeps until it has been processed.
1624 * This is for use when invoked from an ioctl handler.
1626 * If action is ide_preempt, then the rq is queued at the head of
1627 * the request queue, displacing the currently-being-processed
1628 * request and this function returns immediately without waiting
1629 * for the new rq to be completed. This is VERY DANGEROUS, and is
1630 * intended for careful use by the ATAPI tape/cdrom driver code.
1632 * If action is ide_next, then the rq is queued immediately after
1633 * the currently-being-processed-request (if any), and the function
1634 * returns without waiting for the new rq to be completed. As above,
1635 * This is VERY DANGEROUS, and is intended for careful use by the
1636 * ATAPI tape/cdrom driver code.
1638 * If action is ide_end, then the rq is queued at the end of the
1639 * request queue, and the function returns immediately without waiting
1640 * for the new rq to be completed. This is again intended for careful
1641 * use by the ATAPI tape/cdrom driver code.
1643 int ide_do_drive_cmd (ide_drive_t
*drive
, struct request
*rq
, ide_action_t action
)
1645 unsigned long flags
;
1646 ide_hwgroup_t
*hwgroup
= HWGROUP(drive
);
1647 unsigned int major
= HWIF(drive
)->major
;
1648 struct request
*cur_rq
;
1649 DECLARE_MUTEX_LOCKED(sem
);
1651 #ifdef CONFIG_BLK_DEV_PDC4030
1652 if (HWIF(drive
)->chipset
== ide_pdc4030
&& rq
->buffer
!= NULL
)
1653 return -ENOSYS
; /* special drive cmds not supported */
1656 rq
->rq_status
= RQ_ACTIVE
;
1657 rq
->rq_dev
= MKDEV(major
,(drive
->select
.b
.unit
)<<PARTN_BITS
);
1658 if (action
== ide_wait
)
1661 spin_lock_irqsave(&io_request_lock
, flags
);
1662 cur_rq
= drive
->queue
;
1663 if (cur_rq
== NULL
|| action
== ide_preempt
) {
1666 if (action
== ide_preempt
)
1669 if (action
== ide_wait
|| action
== ide_end
) {
1670 while (cur_rq
->next
!= NULL
) /* find end of list */
1671 cur_rq
= cur_rq
->next
;
1673 rq
->next
= cur_rq
->next
;
1676 spin_unlock_irqrestore(&io_request_lock
, flags
);
1677 do_hwgroup_request(hwgroup
);
1678 if (action
== ide_wait
) {
1679 down(&sem
); /* wait for it to be serviced */
1682 return rq
->errors
? -EIO
: 0; /* return -EIO if errors */
1686 * This routine is called to flush all partitions and partition tables
1687 * for a changed disk, and then re-read the new partition table.
1688 * If we are revalidating a disk because of a media change, then we
1689 * enter with usage == 0. If we are using an ioctl, we automatically have
1690 * usage == 1 (we need an open channel to use an ioctl :-), so this
1693 int ide_revalidate_disk(kdev_t i_rdev
)
1696 ide_hwgroup_t
*hwgroup
;
1697 unsigned int p
, major
, minor
;
1700 if ((drive
= get_info_ptr(i_rdev
)) == NULL
)
1702 major
= MAJOR(i_rdev
);
1703 minor
= drive
->select
.b
.unit
<< PARTN_BITS
;
1704 hwgroup
= HWGROUP(drive
);
1705 spin_lock_irqsave(&hwgroup
->spinlock
, flags
);
1706 if (drive
->busy
|| (drive
->usage
> 1)) {
1707 spin_unlock_irqrestore(&hwgroup
->spinlock
, flags
);
1712 spin_unlock_irqrestore(&hwgroup
->spinlock
, flags
);
1714 for (p
= 0; p
< (1<<PARTN_BITS
); ++p
) {
1715 if (drive
->part
[p
].nr_sects
> 0) {
1716 kdev_t devp
= MKDEV(major
, minor
+p
);
1717 struct super_block
* sb
= get_super(devp
);
1720 invalidate_inodes(sb
);
1721 invalidate_buffers (devp
);
1722 set_blocksize(devp
, 1024);
1724 drive
->part
[p
].start_sect
= 0;
1725 drive
->part
[p
].nr_sects
= 0;
1728 drive
->part
[0].nr_sects
= current_capacity(drive
);
1729 if ((drive
->media
!= ide_disk
&& drive
->media
!= ide_floppy
) ||
1730 drive
->driver
== NULL
|| !drive
->part
[0].nr_sects
)
1731 drive
->part
[0].start_sect
= -1;
1732 resetup_one_dev(HWIF(drive
)->gd
, drive
->select
.b
.unit
);
1735 wake_up(&drive
->wqueue
);
1740 static void revalidate_drives (void)
1746 for (index
= 0; index
< MAX_HWIFS
; ++index
) {
1747 hwif
= &ide_hwifs
[index
];
1748 for (unit
= 0; unit
< MAX_DRIVES
; ++unit
) {
1749 drive
= &ide_hwifs
[index
].drives
[unit
];
1750 if (drive
->revalidate
) {
1751 drive
->revalidate
= 0;
1753 (void) ide_revalidate_disk(MKDEV(hwif
->major
, unit
<<PARTN_BITS
));
1759 static void ide_init_module (int type
)
1762 ide_module_t
*module
= ide_modules
;
1765 if (module
->type
== type
) {
1767 (void) module
->init();
1769 module
= module
->next
;
1771 revalidate_drives();
1773 if (!found
&& type
== IDE_PROBE_MODULE
)
1774 (void) request_module("ide-probe");
1775 #endif /* CONFIG_KMOD */
1778 static int ide_open(struct inode
* inode
, struct file
* filp
)
1783 if ((drive
= get_info_ptr(inode
->i_rdev
)) == NULL
)
1786 if (drive
->driver
== NULL
)
1787 ide_init_module(IDE_DRIVER_MODULE
);
1789 if (drive
->driver
== NULL
) {
1790 if (drive
->media
== ide_disk
)
1791 (void) request_module("ide-disk");
1792 if (drive
->media
== ide_cdrom
)
1793 (void) request_module("ide-cd");
1794 if (drive
->media
== ide_tape
)
1795 (void) request_module("ide-tape");
1796 if (drive
->media
== ide_floppy
)
1797 (void) request_module("ide-floppy");
1799 #endif /* CONFIG_KMOD */
1801 sleep_on(&drive
->wqueue
);
1803 if (drive
->driver
!= NULL
) {
1804 if ((rc
= DRIVER(drive
)->open(inode
, filp
, drive
)))
1808 printk ("%s: driver not present\n", drive
->name
);
1815 * Releasing a block device means we sync() it, so that it can safely
1816 * be forgotten about...
1818 static int ide_release(struct inode
* inode
, struct file
* file
)
1822 if ((drive
= get_info_ptr(inode
->i_rdev
)) != NULL
) {
1823 fsync_dev(inode
->i_rdev
);
1825 if (drive
->driver
!= NULL
)
1826 DRIVER(drive
)->release(inode
, file
, drive
);
1832 int ide_replace_subdriver(ide_drive_t
*drive
, const char *driver
)
1834 if (!drive
->present
|| drive
->busy
|| drive
->usage
)
1836 if (drive
->driver
!= NULL
&& DRIVER(drive
)->cleanup(drive
))
1838 strncpy(drive
->driver_req
, driver
, 9);
1839 ide_init_module(IDE_DRIVER_MODULE
);
1840 drive
->driver_req
[0] = 0;
1841 ide_init_module(IDE_DRIVER_MODULE
);
1842 if (DRIVER(drive
) && !strcmp(DRIVER(drive
)->name
, driver
))
1848 #ifdef CONFIG_PROC_FS
1849 ide_proc_entry_t generic_subdriver_entries
[] = {
1850 { "capacity", S_IFREG
|S_IRUGO
, proc_ide_read_capacity
, NULL
},
1851 { NULL
, 0, NULL
, NULL
}
1855 void ide_unregister (unsigned int index
)
1857 struct gendisk
*gd
, **gdp
;
1858 ide_drive_t
*drive
, *d
;
1859 ide_hwif_t
*hwif
, *g
;
1860 ide_hwgroup_t
*hwgroup
;
1861 int irq_count
= 0, unit
, i
;
1862 unsigned long flags
;
1863 unsigned int p
, minor
;
1864 ide_hwif_t old_hwif
;
1866 if (index
>= MAX_HWIFS
)
1868 save_flags(flags
); /* all CPUs */
1869 cli(); /* all CPUs */
1870 hwif
= &ide_hwifs
[index
];
1873 for (unit
= 0; unit
< MAX_DRIVES
; ++unit
) {
1874 drive
= &hwif
->drives
[unit
];
1875 if (!drive
->present
)
1877 if (drive
->busy
|| drive
->usage
)
1879 if (drive
->driver
!= NULL
&& DRIVER(drive
)->cleanup(drive
))
1885 * All clear? Then blow away the buffer cache
1888 for (unit
= 0; unit
< MAX_DRIVES
; ++unit
) {
1889 drive
= &hwif
->drives
[unit
];
1890 if (!drive
->present
)
1892 minor
= drive
->select
.b
.unit
<< PARTN_BITS
;
1893 for (p
= 0; p
< (1<<PARTN_BITS
); ++p
) {
1894 if (drive
->part
[p
].nr_sects
> 0) {
1895 kdev_t devp
= MKDEV(hwif
->major
, minor
+p
);
1896 struct super_block
* sb
= get_super(devp
);
1897 if (sb
) invalidate_inodes(sb
);
1898 invalidate_buffers (devp
);
1901 #ifdef CONFIG_PROC_FS
1902 destroy_proc_ide_drives(hwif
);
1906 hwgroup
= hwif
->hwgroup
;
1909 * free the irq if we were the only hwif using it
1913 if (g
->irq
== hwif
->irq
)
1916 } while (g
!= hwgroup
->hwif
);
1918 free_irq(hwif
->irq
, hwgroup
);
1921 * Note that we only release the standard ports,
1922 * and do not even try to handle any extra ports
1923 * allocated for weird IDE interface chipsets.
1925 ide_release_region(hwif
->io_ports
[IDE_DATA_OFFSET
], 8);
1926 if (hwif
->io_ports
[IDE_CONTROL_OFFSET
])
1927 ide_release_region(hwif
->io_ports
[IDE_CONTROL_OFFSET
], 1);
1930 * Remove us from the hwgroup, and free
1931 * the hwgroup if we were the only member
1934 for (i
= 0; i
< MAX_DRIVES
; ++i
) {
1935 drive
= &hwif
->drives
[i
];
1936 if (!drive
->present
)
1938 while (hwgroup
->drive
->next
!= drive
)
1939 hwgroup
->drive
= hwgroup
->drive
->next
;
1940 hwgroup
->drive
->next
= drive
->next
;
1941 if (hwgroup
->drive
== drive
)
1942 hwgroup
->drive
= NULL
;
1943 if (drive
->id
!= NULL
) {
1951 while (hwgroup
->hwif
->next
!= hwif
)
1952 hwgroup
->hwif
= hwgroup
->hwif
->next
;
1953 hwgroup
->hwif
->next
= hwif
->next
;
1954 if (hwgroup
->hwif
== hwif
)
1957 hwgroup
->hwif
= HWIF(hwgroup
->drive
);
1959 #ifdef CONFIG_BLK_DEV_IDEDMA
1961 (void) ide_release_dma(hwif
);
1962 #endif /* CONFIG_BLK_DEV_IDEDMA */
1965 * Remove us from the kernel's knowledge
1967 unregister_blkdev(hwif
->major
, hwif
->name
);
1968 kfree(blksize_size
[hwif
->major
]);
1969 kfree(max_sectors
[hwif
->major
]);
1970 kfree(max_readahead
[hwif
->major
]);
1971 blk_dev
[hwif
->major
].request_fn
= NULL
;
1972 blk_dev
[hwif
->major
].data
= NULL
;
1973 blk_dev
[hwif
->major
].queue
= NULL
;
1974 blksize_size
[hwif
->major
] = NULL
;
1975 for (gdp
= &gendisk_head
; *gdp
; gdp
= &((*gdp
)->next
))
1976 if (*gdp
== hwif
->gd
)
1979 printk("gd not in disk chain!\n");
1981 gd
= *gdp
; *gdp
= gd
->next
;
1987 init_hwif_data (index
); /* restore hwif data to pristine status */
1988 hwif
->hwgroup
= old_hwif
.hwgroup
;
1989 hwif
->tuneproc
= old_hwif
.tuneproc
;
1990 hwif
->dmaproc
= old_hwif
.dmaproc
;
1991 hwif
->dma_base
= old_hwif
.dma_base
;
1992 hwif
->dma_extra
= old_hwif
.dma_extra
;
1993 hwif
->config_data
= old_hwif
.config_data
;
1994 hwif
->select_data
= old_hwif
.select_data
;
1995 hwif
->irq
= old_hwif
.irq
;
1996 hwif
->major
= old_hwif
.major
;
1997 hwif
->proc
= old_hwif
.proc
;
1998 hwif
->udma_four
= old_hwif
.udma_four
;
1999 hwif
->chipset
= old_hwif
.chipset
;
2000 hwif
->pci_dev
= old_hwif
.pci_dev
;
2001 hwif
->pci_devid
= old_hwif
.pci_devid
;
2003 restore_flags(flags
); /* all CPUs */
2007 * Setup hw_regs_t structure described by parameters. You
2008 * may set up the hw structure yourself OR use this routine to
2011 void ide_setup_ports ( hw_regs_t
*hw
,
2012 ide_ioreg_t base
, int *offsets
,
2013 ide_ioreg_t ctrl
, ide_ioreg_t intr
,
2014 ide_ack_intr_t
*ack_intr
, int irq
)
2018 for (i
= 0; i
< IDE_NR_PORTS
; i
++) {
2019 if (offsets
[i
] == -1) {
2021 case IDE_CONTROL_OFFSET
:
2022 hw
->io_ports
[i
] = ctrl
;
2024 case IDE_IRQ_OFFSET
:
2025 hw
->io_ports
[i
] = intr
;
2028 hw
->io_ports
[i
] = 0;
2032 hw
->io_ports
[i
] = base
+ offsets
[i
];
2036 hw
->ack_intr
= ack_intr
;
2040 * Register an IDE interface, specifing exactly the registers etc
2041 * Set init=1 iff calling before probes have taken place.
2043 int ide_register_hw (hw_regs_t
*hw
, ide_hwif_t
**hwifp
)
2045 int index
, retry
= 1;
2049 for (index
= 0; index
< MAX_HWIFS
; ++index
) {
2050 hwif
= &ide_hwifs
[index
];
2051 if (hwif
->hw
.io_ports
[IDE_DATA_OFFSET
] == hw
->io_ports
[IDE_DATA_OFFSET
])
2054 for (index
= 0; index
< MAX_HWIFS
; ++index
) {
2055 hwif
= &ide_hwifs
[index
];
2056 if ((!hwif
->present
&& !hwif
->mate
&& !initializing
) ||
2057 (!hwif
->hw
.io_ports
[IDE_DATA_OFFSET
] && initializing
))
2060 for (index
= 0; index
< MAX_HWIFS
; index
++)
2061 ide_unregister(index
);
2066 ide_unregister(index
);
2069 memcpy(&hwif
->hw
, hw
, sizeof(*hw
));
2070 memcpy(hwif
->io_ports
, hwif
->hw
.io_ports
, sizeof(hwif
->hw
.io_ports
));
2071 hwif
->irq
= hw
->irq
;
2074 if (!initializing
) {
2075 ide_init_module(IDE_PROBE_MODULE
);
2076 #ifdef CONFIG_PROC_FS
2077 create_proc_ide_interfaces();
2079 ide_init_module(IDE_DRIVER_MODULE
);
2085 return (initializing
|| hwif
->present
) ? index
: -1;
2089 * Compatability function with existing drivers. If you want
2090 * something different, use the function above.
2092 int ide_register (int arg1
, int arg2
, int irq
)
2095 ide_init_hwif_ports(&hw
, (ide_ioreg_t
) arg1
, (ide_ioreg_t
) arg2
, NULL
);
2097 return ide_register_hw(&hw
, NULL
);
2100 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
)
2102 ide_settings_t
**p
= (ide_settings_t
**) &drive
->settings
, *setting
= NULL
;
2104 while ((*p
) && strcmp((*p
)->name
, name
) < 0)
2106 if ((setting
= kmalloc(sizeof(*setting
), GFP_KERNEL
)) == NULL
)
2108 memset(setting
, 0, sizeof(*setting
));
2109 if ((setting
->name
= kmalloc(strlen(name
) + 1, GFP_KERNEL
)) == NULL
)
2111 strcpy(setting
->name
, name
); setting
->rw
= rw
;
2112 setting
->read_ioctl
= read_ioctl
; setting
->write_ioctl
= write_ioctl
;
2113 setting
->data_type
= data_type
; setting
->min
= min
;
2114 setting
->max
= max
; setting
->mul_factor
= mul_factor
;
2115 setting
->div_factor
= div_factor
; setting
->data
= data
;
2116 setting
->set
= set
; setting
->next
= *p
;
2118 setting
->auto_remove
= 1;
2126 void ide_remove_setting(ide_drive_t
*drive
, char *name
)
2128 ide_settings_t
**p
= (ide_settings_t
**) &drive
->settings
, *setting
;
2130 while ((*p
) && strcmp((*p
)->name
, name
))
2132 if ((setting
= (*p
)) == NULL
)
2134 (*p
) = setting
->next
;
2135 kfree(setting
->name
);
2139 static ide_settings_t
*ide_find_setting_by_ioctl(ide_drive_t
*drive
, int cmd
)
2141 ide_settings_t
*setting
= drive
->settings
;
2144 if (setting
->read_ioctl
== cmd
|| setting
->write_ioctl
== cmd
)
2146 setting
= setting
->next
;
2151 ide_settings_t
*ide_find_setting_by_name(ide_drive_t
*drive
, char *name
)
2153 ide_settings_t
*setting
= drive
->settings
;
2156 if (strcmp(setting
->name
, name
) == 0)
2158 setting
= setting
->next
;
2163 static void auto_remove_settings(ide_drive_t
*drive
)
2165 ide_settings_t
*setting
;
2167 setting
= drive
->settings
;
2169 if (setting
->auto_remove
) {
2170 ide_remove_setting(drive
, setting
->name
);
2173 setting
= setting
->next
;
2177 int ide_read_setting(ide_drive_t
*drive
, ide_settings_t
*setting
)
2180 unsigned long flags
;
2182 if ((setting
->rw
& SETTING_READ
)) {
2183 spin_lock_irqsave(&HWGROUP(drive
)->spinlock
, flags
);
2184 switch(setting
->data_type
) {
2186 val
= *((u8
*) setting
->data
);
2189 val
= *((u16
*) setting
->data
);
2193 val
= *((u32
*) setting
->data
);
2196 spin_unlock_irqrestore(&HWGROUP(drive
)->spinlock
, flags
);
2201 int ide_spin_wait_hwgroup (ide_drive_t
*drive
, unsigned long *flags
)
2203 ide_hwgroup_t
*hwgroup
= HWGROUP(drive
);
2204 unsigned long timeout
= jiffies
+ (3 * HZ
);
2206 spin_lock_irqsave(&hwgroup
->spinlock
, *flags
);
2207 while (hwgroup
->busy
) {
2208 spin_unlock_irqrestore(&hwgroup
->spinlock
, *flags
);
2209 __sti(); /* local CPU only; needed for jiffies */
2210 if (0 < (signed long)(jiffies
- timeout
)) {
2211 printk("%s: channel busy\n", drive
->name
);
2214 spin_lock_irqsave(&hwgroup
->spinlock
, *flags
);
2219 int ide_write_setting(ide_drive_t
*drive
, ide_settings_t
*setting
, int val
)
2221 unsigned long flags
;
2225 if (!capable(CAP_SYS_ADMIN
))
2227 if (!(setting
->rw
& SETTING_WRITE
))
2229 if (val
< setting
->min
|| val
> setting
->max
)
2232 return setting
->set(drive
, val
);
2233 if (ide_spin_wait_hwgroup(drive
, &flags
))
2235 switch (setting
->data_type
) {
2237 *((u8
*) setting
->data
) = val
;
2240 *((u16
*) setting
->data
) = val
;
2243 *((u32
*) setting
->data
) = val
;
2246 p
= (u32
*) setting
->data
;
2247 for (i
= 0; i
< 1 << PARTN_BITS
; i
++, p
++)
2251 spin_unlock_irqrestore(&HWGROUP(drive
)->spinlock
, flags
);
2255 static int set_io_32bit(ide_drive_t
*drive
, int arg
)
2257 drive
->io_32bit
= arg
;
2258 #ifdef CONFIG_BLK_DEV_DTC2278
2259 if (HWIF(drive
)->chipset
== ide_dtc2278
)
2260 HWIF(drive
)->drives
[!drive
->select
.b
.unit
].io_32bit
= arg
;
2261 #endif /* CONFIG_BLK_DEV_DTC2278 */
2265 static int set_using_dma(ide_drive_t
*drive
, int arg
)
2267 if (!drive
->driver
|| !DRIVER(drive
)->supports_dma
)
2269 if (!drive
->id
|| !(drive
->id
->capability
& 1) || !HWIF(drive
)->dmaproc
)
2271 if (HWIF(drive
)->dmaproc(arg
? ide_dma_on
: ide_dma_off
, drive
))
2276 static int set_pio_mode(ide_drive_t
*drive
, int arg
)
2280 if (!HWIF(drive
)->tuneproc
)
2282 if (drive
->special
.b
.set_tune
)
2284 ide_init_drive_cmd(&rq
);
2285 drive
->tune_req
= (byte
) arg
;
2286 drive
->special
.b
.set_tune
= 1;
2287 (void) ide_do_drive_cmd (drive
, &rq
, ide_wait
);
2291 void ide_add_generic_settings(ide_drive_t
*drive
)
2294 * drive setting name read/write access read ioctl write ioctl data type min max mul_factor div_factor data pointer set function
2296 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
);
2297 ide_add_setting(drive
, "keepsettings", SETTING_RW
, HDIO_GET_KEEPSETTINGS
, HDIO_SET_KEEPSETTINGS
, TYPE_BYTE
, 0, 1, 1, 1, &drive
->keep_settings
, NULL
);
2298 ide_add_setting(drive
, "nice1", SETTING_RW
, -1, -1, TYPE_BYTE
, 0, 1, 1, 1, &drive
->nice1
, NULL
);
2299 ide_add_setting(drive
, "pio_mode", SETTING_WRITE
, -1, HDIO_SET_PIO_MODE
, TYPE_BYTE
, 0, 255, 1, 1, NULL
, set_pio_mode
);
2300 ide_add_setting(drive
, "slow", SETTING_RW
, -1, -1, TYPE_BYTE
, 0, 1, 1, 1, &drive
->slow
, NULL
);
2301 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
);
2302 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
);
2305 int ide_wait_cmd (ide_drive_t
*drive
, int cmd
, int nsect
, int feature
, int sectors
, byte
*buf
)
2312 memset(buf
, 0, 4 + SECTOR_WORDS
* 4 * sectors
);
2313 ide_init_drive_cmd(&rq
);
2319 return ide_do_drive_cmd(drive
, &rq
, ide_wait
);
2323 * Delay for *at least* 50ms. As we don't know how much time is left
2324 * until the next tick occurs, we wait an extra tick to be safe.
2325 * This is used only during the probing/polling for drives at boot time.
2327 * However, its usefullness may be needed in other places, thus we export it now.
2328 * The future may change this to a millisecond setable delay.
2330 void ide_delay_50ms (void)
2332 unsigned long timeout
= jiffies
+ ((HZ
+ 19)/20) + 1;
2333 while (0 < (signed long)(timeout
- jiffies
));
2336 int ide_config_drive_speed (ide_drive_t
*drive
, byte speed
)
2338 struct hd_driveid
*id
= drive
->id
;
2339 unsigned long flags
;
2342 __save_flags(flags
); /* local CPU only */
2343 __cli(); /* local CPU only */
2346 * Don't use ide_wait_cmd here - it will
2347 * attempt to set_geometry and recalibrate,
2348 * but for some reason these don't work at
2349 * this point (lost interrupt).
2351 SELECT_DRIVE(HWIF(drive
), drive
);
2352 if (IDE_CONTROL_REG
)
2353 OUT_BYTE(drive
->ctl
| 2, IDE_CONTROL_REG
);
2354 OUT_BYTE(speed
, IDE_NSECTOR_REG
);
2355 OUT_BYTE(SETFEATURES_XFER
, IDE_FEATURE_REG
);
2356 OUT_BYTE(WIN_SETFEATURES
, IDE_COMMAND_REG
);
2358 err
= ide_wait_stat(drive
, DRIVE_READY
, BUSY_STAT
|DRQ_STAT
|ERR_STAT
, WAIT_CMD
);
2361 if (IDE_CONTROL_REG
)
2362 OUT_BYTE(drive
->ctl
, IDE_CONTROL_REG
);
2365 __restore_flags(flags
); /* local CPU only */
2369 if (!((id
->dma_ultra
>> 8) & 16)) {
2370 drive
->id
->dma_ultra
&= ~0xFF00;
2371 drive
->id
->dma_ultra
|= 0x1010;
2373 drive
->id
->dma_mword
&= ~0x0F00;
2374 drive
->id
->dma_1word
&= ~0x0F00;
2377 if (!((id
->dma_ultra
>> 8) & 8)) {
2378 drive
->id
->dma_ultra
&= ~0xFF00;
2379 drive
->id
->dma_ultra
|= 0x0808;
2381 drive
->id
->dma_mword
&= ~0x0F00;
2382 drive
->id
->dma_1word
&= ~0x0F00;
2385 if (!((id
->dma_ultra
>> 8) & 4)) {
2386 drive
->id
->dma_ultra
&= ~0xFF00;
2387 drive
->id
->dma_ultra
|= 0x0404;
2389 drive
->id
->dma_mword
&= ~0x0F00;
2390 drive
->id
->dma_1word
&= ~0x0F00;
2393 if (!((id
->dma_ultra
>> 8) & 2)) {
2394 drive
->id
->dma_ultra
&= ~0xFF00;
2395 drive
->id
->dma_ultra
|= 0x0202;
2397 drive
->id
->dma_mword
&= ~0x0F00;
2398 drive
->id
->dma_1word
&= ~0x0F00;
2401 if (!((id
->dma_ultra
>> 8) & 1)) {
2402 drive
->id
->dma_ultra
&= ~0xFF00;
2403 drive
->id
->dma_ultra
|= 0x0101;
2405 drive
->id
->dma_mword
&= ~0x0F00;
2406 drive
->id
->dma_1word
&= ~0x0F00;
2409 drive
->id
->dma_ultra
&= ~0xFF00;
2410 if (!((id
->dma_mword
>> 8) & 4)) {
2411 drive
->id
->dma_mword
&= ~0x0F00;
2412 drive
->id
->dma_mword
|= 0x0404;
2414 drive
->id
->dma_1word
&= ~0x0F00;
2417 drive
->id
->dma_ultra
&= ~0xFF00;
2418 if (!((id
->dma_mword
>> 8) & 2)) {
2419 drive
->id
->dma_mword
&= ~0x0F00;
2420 drive
->id
->dma_mword
|= 0x0202;
2422 drive
->id
->dma_1word
&= ~0x0F00;
2425 drive
->id
->dma_ultra
&= ~0xFF00;
2426 if (!((id
->dma_mword
>> 8) & 1)) {
2427 drive
->id
->dma_mword
&= ~0x0F00;
2428 drive
->id
->dma_mword
|= 0x0101;
2430 drive
->id
->dma_1word
&= ~0x0F00;
2433 drive
->id
->dma_ultra
&= ~0xFF00;
2434 drive
->id
->dma_mword
&= ~0x0F00;
2435 if (!((id
->dma_1word
>> 8) & 4)) {
2436 drive
->id
->dma_1word
&= ~0x0F00;
2437 drive
->id
->dma_1word
|= 0x0404;
2441 drive
->id
->dma_ultra
&= ~0xFF00;
2442 drive
->id
->dma_mword
&= ~0x0F00;
2443 if (!((id
->dma_1word
>> 8) & 2)) {
2444 drive
->id
->dma_1word
&= ~0x0F00;
2445 drive
->id
->dma_1word
|= 0x0202;
2449 drive
->id
->dma_ultra
&= ~0xFF00;
2450 drive
->id
->dma_mword
&= ~0x0F00;
2451 if (!((id
->dma_1word
>> 8) & 1)) {
2452 drive
->id
->dma_1word
&= ~0x0F00;
2453 drive
->id
->dma_1word
|= 0x0101;
2457 drive
->id
->dma_ultra
&= ~0xFF00;
2458 drive
->id
->dma_mword
&= ~0x0F00;
2459 drive
->id
->dma_1word
&= ~0x0F00;
2466 static int ide_ioctl (struct inode
*inode
, struct file
*file
,
2467 unsigned int cmd
, unsigned long arg
)
2469 int err
= 0, major
, minor
;
2473 ide_settings_t
*setting
;
2475 if (!inode
|| !(dev
= inode
->i_rdev
))
2477 major
= MAJOR(dev
); minor
= MINOR(dev
);
2478 if ((drive
= get_info_ptr(inode
->i_rdev
)) == NULL
)
2481 if ((setting
= ide_find_setting_by_ioctl(drive
, cmd
)) != NULL
) {
2482 if (cmd
== setting
->read_ioctl
) {
2483 err
= ide_read_setting(drive
, setting
);
2484 return err
>= 0 ? put_user(err
, (long *) arg
) : err
;
2486 if ((MINOR(inode
->i_rdev
) & PARTN_MASK
))
2488 return ide_write_setting(drive
, setting
, arg
);
2492 ide_init_drive_cmd (&rq
);
2496 struct hd_geometry
*loc
= (struct hd_geometry
*) arg
;
2497 unsigned short bios_cyl
= drive
->bios_cyl
; /* truncate */
2498 if (!loc
|| (drive
->media
!= ide_disk
&& drive
->media
!= ide_floppy
)) return -EINVAL
;
2499 if (put_user(drive
->bios_head
, (byte
*) &loc
->heads
)) return -EFAULT
;
2500 if (put_user(drive
->bios_sect
, (byte
*) &loc
->sectors
)) return -EFAULT
;
2501 if (put_user(bios_cyl
, (unsigned short *) &loc
->cylinders
)) return -EFAULT
;
2502 if (put_user((unsigned)drive
->part
[MINOR(inode
->i_rdev
)&PARTN_MASK
].start_sect
,
2503 (unsigned long *) &loc
->start
)) return -EFAULT
;
2507 case BLKGETSIZE
: /* Return device size */
2508 return put_user(drive
->part
[MINOR(inode
->i_rdev
)&PARTN_MASK
].nr_sects
, (long *) arg
);
2510 case BLKRRPART
: /* Re-read partition tables */
2511 if (!capable(CAP_SYS_ADMIN
)) return -EACCES
;
2512 return ide_revalidate_disk(inode
->i_rdev
);
2514 case HDIO_OBSOLETE_IDENTITY
:
2515 case HDIO_GET_IDENTITY
:
2516 if (MINOR(inode
->i_rdev
) & PARTN_MASK
)
2518 if (drive
->id
== NULL
)
2520 if (copy_to_user((char *)arg
, (char *)drive
->id
,
2521 (cmd
== HDIO_GET_IDENTITY
) ? sizeof(*drive
->id
) : 142))
2526 return put_user(drive
->dsc_overlap
<< IDE_NICE_DSC_OVERLAP
|
2527 drive
->atapi_overlap
<< IDE_NICE_ATAPI_OVERLAP
|
2528 drive
->nice0
<< IDE_NICE_0
|
2529 drive
->nice1
<< IDE_NICE_1
|
2530 drive
->nice2
<< IDE_NICE_2
,
2532 case HDIO_DRIVE_CMD
:
2534 byte args
[4], *argbuf
= args
;
2536 if (!capable(CAP_SYS_ADMIN
)) return -EACCES
;
2537 if (NULL
== (void *) arg
)
2538 return ide_do_drive_cmd(drive
, &rq
, ide_wait
);
2539 if (copy_from_user(args
, (void *)arg
, 4))
2542 argsize
= 4 + (SECTOR_WORDS
* 4 * args
[3]);
2543 argbuf
= kmalloc(argsize
, GFP_KERNEL
);
2546 memcpy(argbuf
, args
, 4);
2548 if ((((byte
*)arg
)[0] == WIN_SETFEATURES
) &&
2549 (((byte
*)arg
)[1] > 66) &&
2550 (((byte
*)arg
)[2] == 3)) {
2551 if (!HWIF(drive
)->udma_four
) {
2552 printk("%s: Speed warnings UDMA 3/4 is not functional.\n", HWIF(drive
)->name
);
2555 if ((drive
->id
->word93
& 0x2000) == 0) {
2556 printk("%s: Speed warnings UDMA 3/4 is not functional.\n", drive
->name
);
2560 err
= ide_wait_cmd(drive
, args
[0], args
[1], args
[2], args
[3], argbuf
);
2562 (((byte
*)arg
)[0] == WIN_SETFEATURES
) &&
2563 (((byte
*)arg
)[1] >= 16) &&
2564 (((byte
*)arg
)[2] == 3) &&
2565 (drive
->id
->dma_ultra
||
2566 drive
->id
->dma_mword
||
2567 drive
->id
->dma_1word
)) {
2570 * Re-read drive->id for possible DMA mode
2571 * change (copied from ide-probe.c)
2573 struct hd_driveid
*id
;
2574 unsigned long timeout
, irqs
, flags
;
2576 probe_irq_off(probe_irq_on());
2577 irqs
= probe_irq_on();
2578 if (IDE_CONTROL_REG
)
2579 OUT_BYTE(drive
->ctl
,IDE_CONTROL_REG
);
2581 OUT_BYTE(WIN_IDENTIFY
, IDE_COMMAND_REG
);
2582 timeout
= jiffies
+ WAIT_WORSTCASE
;
2584 if (0 < (signed long)(jiffies
- timeout
)) {
2586 (void) probe_irq_off(irqs
);
2587 goto abort
; /* drive timed-out */
2589 ide_delay_50ms(); /* give drive a breather */
2590 } while (IN_BYTE(IDE_ALTSTATUS_REG
) & BUSY_STAT
);
2591 ide_delay_50ms(); /* wait for IRQ and DRQ_STAT */
2592 if (!OK_STAT(GET_STAT(),DRQ_STAT
,BAD_R_STAT
))
2594 __save_flags(flags
); /* local CPU only */
2595 __cli(); /* local CPU only; some systems need this */
2596 id
= kmalloc(SECTOR_WORDS
*4, GFP_ATOMIC
);
2597 ide_input_data(drive
, id
, SECTOR_WORDS
);
2598 (void) GET_STAT(); /* clear drive IRQ */
2599 ide__sti(); /* local CPU only */
2600 __restore_flags(flags
); /* local CPU only */
2601 ide_fix_driveid(id
);
2602 if (id
&& id
->cyls
) {
2603 drive
->id
->dma_ultra
= id
->dma_ultra
;
2604 drive
->id
->dma_mword
= id
->dma_mword
;
2605 drive
->id
->dma_1word
= id
->dma_1word
;
2606 /* anything more ? */
2608 printk("%s: dma_ultra=%04X, dma_mword=%04X, dma_1word=%04X\n",
2609 drive
->name
, id
->dma_ultra
, id
->dma_mword
, id
->dma_1word
);
2615 if (copy_to_user((void *)arg
, argbuf
, argsize
))
2622 case HDIO_SCAN_HWIF
:
2625 if (!capable(CAP_SYS_ADMIN
)) return -EACCES
;
2626 if (copy_from_user(args
, (void *)arg
, 3 * sizeof(int)))
2628 if (ide_register(args
[0], args
[1], args
[2]) == -1)
2632 case HDIO_UNREGISTER_HWIF
:
2633 if (!capable(CAP_SYS_ADMIN
)) return -EACCES
;
2634 /* should I check here for arg > MAX_HWIFS, or
2635 just let ide_unregister fail silently? -- shaver */
2636 ide_unregister(arg
);
2639 if (!capable(CAP_SYS_ADMIN
)) return -EACCES
;
2640 if (drive
->driver
== NULL
)
2642 if (arg
!= (arg
& ((1 << IDE_NICE_DSC_OVERLAP
) | (1 << IDE_NICE_1
))))
2644 drive
->dsc_overlap
= (arg
>> IDE_NICE_DSC_OVERLAP
) & 1;
2645 if (drive
->dsc_overlap
&& !DRIVER(drive
)->supports_dsc_overlap
) {
2646 drive
->dsc_overlap
= 0;
2649 drive
->nice1
= (arg
>> IDE_NICE_1
) & 1;
2657 return blk_ioctl(inode
->i_rdev
, cmd
, arg
);
2660 if (drive
->driver
!= NULL
)
2661 return DRIVER(drive
)->ioctl(drive
, inode
, file
, cmd
, arg
);
2666 static int ide_check_media_change (kdev_t i_rdev
)
2670 if ((drive
= get_info_ptr(i_rdev
)) == NULL
)
2672 if (drive
->driver
!= NULL
)
2673 return DRIVER(drive
)->media_change(drive
);
2677 void ide_fixstring (byte
*s
, const int bytecount
, const int byteswap
)
2679 byte
*p
= s
, *end
= &s
[bytecount
& ~1]; /* bytecount must be even */
2682 /* convert from big-endian to host byte order */
2683 for (p
= end
; p
!= s
;) {
2684 unsigned short *pp
= (unsigned short *) (p
-= 2);
2689 /* strip leading blanks */
2690 while (s
!= end
&& *s
== ' ')
2693 /* compress internal blanks and strip trailing blanks */
2694 while (s
!= end
&& *s
) {
2695 if (*s
++ != ' ' || (s
!= end
&& *s
&& *s
!= ' '))
2699 /* wipe out trailing garbage */
2707 char *ide_xfer_verbose (byte xfer_rate
) {
2709 case XFER_UDMA_4
: return("UDMA 4");
2710 case XFER_UDMA_3
: return("UDMA 3");
2711 case XFER_UDMA_2
: return("UDMA 2");
2712 case XFER_UDMA_1
: return("UDMA 1");
2713 case XFER_UDMA_0
: return("UDMA 0");
2714 case XFER_MW_DMA_2
: return("MW DMA 2");
2715 case XFER_MW_DMA_1
: return("MW DMA 1");
2716 case XFER_MW_DMA_0
: return("MW DMA 0");
2717 case XFER_SW_DMA_2
: return("SW DMA 2");
2718 case XFER_SW_DMA_1
: return("SW DMA 1");
2719 case XFER_SW_DMA_0
: return("SW DMA 0");
2720 case XFER_PIO_4
: return("PIO 4");
2721 case XFER_PIO_3
: return("PIO 3");
2722 case XFER_PIO_2
: return("PIO 2");
2723 case XFER_PIO_1
: return("PIO 1");
2724 case XFER_PIO_0
: return("PIO 0");
2725 case XFER_PIO_SLOW
: return("PIO SLOW");
2726 default: return("XFER ERROR");
2731 * stridx() returns the offset of c within s,
2732 * or -1 if c is '\0' or not found within s.
2734 static int __init
stridx (const char *s
, char c
)
2736 char *i
= strchr(s
, c
);
2737 return (i
&& c
) ? i
- s
: -1;
2741 * match_parm() does parsing for ide_setup():
2743 * 1. the first char of s must be '='.
2744 * 2. if the remainder matches one of the supplied keywords,
2745 * the index (1 based) of the keyword is negated and returned.
2746 * 3. if the remainder is a series of no more than max_vals numbers
2747 * separated by commas, the numbers are saved in vals[] and a
2748 * count of how many were saved is returned. Base10 is assumed,
2749 * and base16 is allowed when prefixed with "0x".
2750 * 4. otherwise, zero is returned.
2752 static int __init
match_parm (char *s
, const char *keywords
[], int vals
[], int max_vals
)
2754 static const char *decimal
= "0123456789";
2755 static const char *hex
= "0123456789abcdef";
2760 * Try matching against the supplied keywords,
2761 * and return -(index+1) if we match one
2763 if (keywords
!= NULL
) {
2764 for (i
= 0; *keywords
!= NULL
; ++i
) {
2765 if (!strcmp(s
, *keywords
++))
2770 * Look for a series of no more than "max_vals"
2771 * numeric values separated by commas, in base10,
2772 * or base16 when prefixed with "0x".
2773 * Return a count of how many were found.
2775 for (n
= 0; (i
= stridx(decimal
, *s
)) >= 0;) {
2777 while ((i
= stridx(decimal
, *++s
)) >= 0)
2778 vals
[n
] = (vals
[n
] * 10) + i
;
2779 if (*s
== 'x' && !vals
[n
]) {
2780 while ((i
= stridx(hex
, *++s
)) >= 0)
2781 vals
[n
] = (vals
[n
] * 0x10) + i
;
2783 if (++n
== max_vals
)
2785 if (*s
== ',' || *s
== ';')
2791 return 0; /* zero = nothing matched */
2795 * ide_setup() gets called VERY EARLY during initialization,
2796 * to handle kernel "command line" strings beginning with "hdx="
2797 * or "ide". Here is the complete set currently supported:
2799 * "hdx=" is recognized for all "x" from "a" to "h", such as "hdc".
2800 * "idex=" is recognized for all "x" from "0" to "3", such as "ide1".
2802 * "hdx=noprobe" : drive may be present, but do not probe for it
2803 * "hdx=none" : drive is NOT present, ignore cmos and do not probe
2804 * "hdx=nowerr" : ignore the WRERR_STAT bit on this drive
2805 * "hdx=cdrom" : drive is present, and is a cdrom drive
2806 * "hdx=cyl,head,sect" : disk drive is present, with specified geometry
2807 * "hdx=noremap" : do not remap 0->1 even though EZD was detected
2808 * "hdx=autotune" : driver will attempt to tune interface speed
2809 * to the fastest PIO mode supported,
2810 * if possible for this drive only.
2811 * Not fully supported by all chipset types,
2812 * and quite likely to cause trouble with
2813 * older/odd IDE drives.
2815 * "hdx=slow" : insert a huge pause after each access to the data
2816 * port. Should be used only as a last resort.
2818 * "hdx=swapdata" : when the drive is a disk, byte swap all data
2819 * "hdx=bswap" : same as above..........
2820 * "hdx=flash" : allows for more than one ata_flash disk to be
2821 * registered. In most cases, only one device
2824 * "idebus=xx" : inform IDE driver of VESA/PCI bus speed in MHz,
2825 * where "xx" is between 20 and 66 inclusive,
2826 * used when tuning chipset PIO modes.
2827 * For PCI bus, 25 is correct for a P75 system,
2828 * 30 is correct for P90,P120,P180 systems,
2829 * and 33 is used for P100,P133,P166 systems.
2830 * If in doubt, use idebus=33 for PCI.
2831 * As for VLB, it is safest to not specify it.
2833 * "idex=noprobe" : do not attempt to access/use this interface
2834 * "idex=base" : probe for an interface at the addr specified,
2835 * where "base" is usually 0x1f0 or 0x170
2836 * and "ctl" is assumed to be "base"+0x206
2837 * "idex=base,ctl" : specify both base and ctl
2838 * "idex=base,ctl,irq" : specify base, ctl, and irq number
2839 * "idex=autotune" : driver will attempt to tune interface speed
2840 * to the fastest PIO mode supported,
2841 * for all drives on this interface.
2842 * Not fully supported by all chipset types,
2843 * and quite likely to cause trouble with
2844 * older/odd IDE drives.
2845 * "idex=noautotune" : driver will NOT attempt to tune interface speed
2846 * This is the default for most chipsets,
2847 * except the cmd640.
2848 * "idex=serialize" : do not overlap operations on idex and ide(x^1)
2849 * "idex=four" : four drives on idex and ide(x^1) share same ports
2850 * "idex=reset" : reset interface before first use
2851 * "idex=dma" : enable DMA by default on both drives if possible
2852 * "idex=ata66" : informs the interface that it has an 80c cable
2853 * for chipsets that are ATA-66 capable, but
2854 * the ablity to bit test for detection is
2855 * currently unknown.
2857 * "splitfifo=betweenChan"
2858 * : FIFO Configuration of VIA 82c586(<nothing>,"A"or"B").
2859 * --see what follows...
2860 * "splitfifo=betweenChan,thresholdprim,thresholdsec"
2861 * : FIFO Configuration of VIA 82c586(<nothing>,"A" or "B").
2862 * betweenChan = 1(all FIFO's to primary channel)
2863 * , 2(all FIFO's to secondary channel)
2864 * , 3 or 4(evenly shared between them).
2865 * note: without FIFO, a channel is (u)dma disabled!
2866 * thresholdprim = 4, 3, 2 or 1
2867 * (standing for 1, 3/4, 1/2, 1/4).
2868 * Sets the threshold of FIFO to begin dma
2869 * transfer on the primary channel.
2870 * thresholdsec = cf upper, but for secondary channel.
2872 * The following are valid ONLY on ide0, (except dc4030)
2873 * and the defaults for the base,ctl ports must not be altered.
2875 * "ide0=dtc2278" : probe/support DTC2278 interface
2876 * "ide0=ht6560b" : probe/support HT6560B interface
2877 * "ide0=cmd640_vlb" : *REQUIRED* for VLB cards with the CMD640 chip
2878 * (not for PCI -- automatically detected)
2879 * "ide0=qd6580" : probe/support qd6580 interface
2880 * "ide0=ali14xx" : probe/support ali14xx chipsets (ALI M1439, M1443, M1445)
2881 * "ide0=umc8672" : probe/support umc8672 chipsets
2882 * "idex=dc4030" : probe/support Promise DC4030VL interface
2883 * "ide=doubler" : probe/support IDE doublers on Amiga
2885 void __init
ide_setup (char *s
)
2890 unsigned int hw
, unit
;
2891 const char max_drive
= 'a' + ((MAX_HWIFS
* MAX_DRIVES
) - 1);
2892 const char max_hwif
= '0' + (MAX_HWIFS
- 1);
2894 printk("ide_setup: %s", s
);
2896 #ifdef CONFIG_BLK_DEV_IDEDOUBLER
2897 if (!strcmp(s
, "ide=doubler")) {
2898 extern int ide_doubler
;
2900 printk("ide: Enabled support for IDE doublers\n");
2904 #endif /* CONFIG_BLK_DEV_IDEDOUBLER */
2909 * Look for drive options: "hdx="
2911 if (s
[0] == 'h' && s
[1] == 'd' && s
[2] >= 'a' && s
[2] <= max_drive
) {
2912 const char *hd_words
[] = {"none", "noprobe", "nowerr", "cdrom",
2913 "serialize", "autotune", "noautotune",
2914 "slow", "swapdata", "bswap", "flash",
2915 "remap", "noremap", NULL
};
2917 hw
= unit
/ MAX_DRIVES
;
2918 unit
= unit
% MAX_DRIVES
;
2919 hwif
= &ide_hwifs
[hw
];
2920 drive
= &hwif
->drives
[unit
];
2921 if (strncmp(s
+ 4, "ide-", 4) == 0) {
2922 strncpy(drive
->driver_req
, s
+ 4, 9);
2925 switch (match_parm(&s
[3], hd_words
, vals
, 3)) {
2926 case -1: /* "none" */
2927 drive
->nobios
= 1; /* drop into "noprobe" */
2928 case -2: /* "noprobe" */
2931 case -3: /* "nowerr" */
2932 drive
->bad_wstat
= BAD_R_STAT
;
2935 case -4: /* "cdrom" */
2937 drive
->media
= ide_cdrom
;
2940 case -5: /* "serialize" */
2941 printk(" -- USE \"ide%d=serialize\" INSTEAD", hw
);
2943 case -6: /* "autotune" */
2944 drive
->autotune
= 1;
2946 case -7: /* "noautotune" */
2947 drive
->autotune
= 2;
2949 case -8: /* "slow" */
2952 case -9: /* "swapdata" or "bswap" */
2956 case -11: /* "flash" */
2957 drive
->ata_flash
= 1;
2959 case -12: /* "remap" */
2960 drive
->remap_0_to_1
= 1;
2962 case -13: /* "noremap" */
2963 drive
->remap_0_to_1
= 2;
2965 case 3: /* cyl,head,sect */
2966 drive
->media
= ide_disk
;
2967 drive
->cyl
= drive
->bios_cyl
= vals
[0];
2968 drive
->head
= drive
->bios_head
= vals
[1];
2969 drive
->sect
= drive
->bios_sect
= vals
[2];
2971 drive
->forced_geom
= 1;
2979 #if defined(CONFIG_BLK_DEV_VIA82CXXX)
2981 * Look for drive option "splitfifo=..."
2984 if (s
[0] == 's' && s
[1] == 'p' && s
[2] == 'l' &&
2985 s
[3] == 'i' && s
[4] == 't' && s
[5] == 'f' &&
2986 s
[6] == 'i' && s
[7] == 'f' && s
[8] == 'o') {
2987 byte tmp
= 0x3a; /* default config byte */
2989 i
= match_parm(&s
[9], NULL
, vals
, 3);
2993 if ((vals
[1] > 0) && (vals
[1] < 5)) {
2994 /* sets threshold for primary Channel: */
2995 byte x
= 4 - vals
[1];
3000 if ((vals
[2] > 0) && (vals
[2] < 5)) {
3001 /* sets threshold for secondary Channel: */
3002 byte x
= 4 - vals
[2];
3008 /* set the FIFO config between channels to 0: */
3010 /* set the needed FIFO config between channels: */
3011 if (vals
[0] == 1) /* primary fifo only */
3013 else if (vals
[0] == 2) /* secondary fifo only */
3015 else if (vals
[0] == 4) /* other shared fifo config */
3017 else if (vals
[0] == 3) /* default config */
3025 /* set the found option in fifoconfig */
3029 #endif /* defined(CONFIG_BLK_DEV_VIA82CXXX) */
3031 if (s
[0] != 'i' || s
[1] != 'd' || s
[2] != 'e')
3034 * Look for bus speed option: "idebus="
3036 if (s
[3] == 'b' && s
[4] == 'u' && s
[5] == 's') {
3037 if (match_parm(&s
[6], NULL
, vals
, 1) != 1)
3039 if (vals
[0] >= 20 && vals
[0] <= 66)
3040 idebus_parameter
= vals
[0];
3042 printk(" -- BAD BUS SPEED! Expected value from 20 to 66");
3046 * Look for interface options: "idex="
3048 if (s
[3] >= '0' && s
[3] <= max_hwif
) {
3050 * Be VERY CAREFUL changing this: note hardcoded indexes below
3051 * -8,-9,-10 : are reserved for future idex calls to ease the hardcoding.
3053 const char *ide_words
[] = {
3054 "noprobe", "serialize", "autotune", "noautotune", "reset", "dma", "ata66",
3055 "minus8", "minus9", "minus10",
3056 "four", "qd6580", "ht6560b", "cmd640_vlb", "dtc2278", "umc8672", "ali14xx", "dc4030", NULL
};
3058 hwif
= &ide_hwifs
[hw
];
3059 i
= match_parm(&s
[4], ide_words
, vals
, 3);
3062 * Cryptic check to ensure chipset not already set for hwif:
3064 if (i
> 0 || i
<= -11) { /* is parameter a chipset name? */
3065 if (hwif
->chipset
!= ide_unknown
)
3066 goto bad_option
; /* chipset already specified */
3067 if (i
<= -11 && i
!= -18 && hw
!= 0)
3068 goto bad_hwif
; /* chipset drivers are for "ide0=" only */
3069 if (i
<= -11 && i
!= -18 && ide_hwifs
[hw
+1].chipset
!= ide_unknown
)
3070 goto bad_option
; /* chipset for 2nd port already specified */
3075 #ifdef CONFIG_BLK_DEV_PDC4030
3076 case -18: /* "dc4030" */
3078 extern void init_pdc4030(void);
3082 #endif /* CONFIG_BLK_DEV_PDC4030 */
3083 #ifdef CONFIG_BLK_DEV_ALI14XX
3084 case -17: /* "ali14xx" */
3086 extern void init_ali14xx (void);
3090 #endif /* CONFIG_BLK_DEV_ALI14XX */
3091 #ifdef CONFIG_BLK_DEV_UMC8672
3092 case -16: /* "umc8672" */
3094 extern void init_umc8672 (void);
3098 #endif /* CONFIG_BLK_DEV_UMC8672 */
3099 #ifdef CONFIG_BLK_DEV_DTC2278
3100 case -15: /* "dtc2278" */
3102 extern void init_dtc2278 (void);
3106 #endif /* CONFIG_BLK_DEV_DTC2278 */
3107 #ifdef CONFIG_BLK_DEV_CMD640
3108 case -14: /* "cmd640_vlb" */
3110 extern int cmd640_vlb
; /* flag for cmd640.c */
3114 #endif /* CONFIG_BLK_DEV_CMD640 */
3115 #ifdef CONFIG_BLK_DEV_HT6560B
3116 case -13: /* "ht6560b" */
3118 extern void init_ht6560b (void);
3122 #endif /* CONFIG_BLK_DEV_HT6560B */
3123 #if CONFIG_BLK_DEV_QD6580
3124 case -12: /* "qd6580" */
3126 extern void init_qd6580 (void);
3130 #endif /* CONFIG_BLK_DEV_QD6580 */
3131 #ifdef CONFIG_BLK_DEV_4DRIVES
3132 case -11: /* "four" drives on one set of ports */
3134 ide_hwif_t
*mate
= &ide_hwifs
[hw
^1];
3135 mate
->drives
[0].select
.all
^= 0x20;
3136 mate
->drives
[1].select
.all
^= 0x20;
3137 hwif
->chipset
= mate
->chipset
= ide_4drives
;
3138 mate
->irq
= hwif
->irq
;
3139 memcpy(mate
->io_ports
, hwif
->io_ports
, sizeof(hwif
->io_ports
));
3142 #endif /* CONFIG_BLK_DEV_4DRIVES */
3143 case -10: /* minus10 */
3144 case -9: /* minus9 */
3145 case -8: /* minus8 */
3147 case -7: /* ata66 */
3148 #ifdef CONFIG_BLK_DEV_IDEPCI
3149 hwif
->udma_four
= 1;
3151 #else /* !CONFIG_BLK_DEV_IDEPCI */
3152 hwif
->udma_four
= 0;
3154 #endif /* CONFIG_BLK_DEV_IDEPCI */
3158 case -5: /* "reset" */
3161 case -4: /* "noautotune" */
3162 hwif
->drives
[0].autotune
= 2;
3163 hwif
->drives
[1].autotune
= 2;
3165 case -3: /* "autotune" */
3166 hwif
->drives
[0].autotune
= 1;
3167 hwif
->drives
[1].autotune
= 1;
3169 case -2: /* "serialize" */
3171 hwif
->mate
= &ide_hwifs
[hw
^1];
3172 hwif
->mate
->mate
= hwif
;
3173 hwif
->serialized
= hwif
->mate
->serialized
= 1;
3176 case -1: /* "noprobe" */
3181 vals
[1] = vals
[0] + 0x206; /* default ctl */
3182 case 2: /* base,ctl */
3183 vals
[2] = 0; /* default irq = probe for it */
3184 case 3: /* base,ctl,irq */
3185 hwif
->hw
.irq
= vals
[2];
3186 ide_init_hwif_ports(&hwif
->hw
, (ide_ioreg_t
) vals
[0], (ide_ioreg_t
) vals
[1], &hwif
->irq
);
3187 memcpy(hwif
->io_ports
, hwif
->hw
.io_ports
, sizeof(hwif
->io_ports
));
3188 hwif
->irq
= vals
[2];
3190 hwif
->chipset
= ide_generic
;
3193 case 0: goto bad_option
;
3195 printk(" -- SUPPORT NOT CONFIGURED IN THIS KERNEL\n");
3200 printk(" -- BAD OPTION\n");
3203 printk("-- NOT SUPPORTED ON ide%d", hw
);
3209 * probe_for_hwifs() finds/initializes "known" IDE interfaces
3211 static void __init
probe_for_hwifs (void)
3216 #ifdef CONFIG_BLK_DEV_IDEPCI
3219 #ifdef CONFIG_BLK_DEV_RZ1000
3221 extern void ide_probe_for_rz100x(void);
3222 ide_probe_for_rz100x();
3224 #endif /* CONFIG_BLK_DEV_RZ1000 */
3225 #endif /* CONFIG_BLK_DEV_IDEPCI */
3227 #endif /* CONFIG_PCI */
3229 #ifdef CONFIG_BLK_DEV_CMD640
3231 extern void ide_probe_for_cmd640x(void);
3232 ide_probe_for_cmd640x();
3234 #endif /* CONFIG_BLK_DEV_CMD640 */
3235 #ifdef CONFIG_BLK_DEV_PDC4030
3237 extern int ide_probe_for_pdc4030(void);
3238 (void) ide_probe_for_pdc4030();
3240 #endif /* CONFIG_BLK_DEV_PDC4030 */
3241 #ifdef CONFIG_BLK_DEV_IDE_PMAC
3243 extern void pmac_ide_probe(void);
3246 #endif /* CONFIG_BLK_DEV_IDE_PMAC */
3247 #ifdef CONFIG_BLK_DEV_IDE_ICSIDE
3249 extern void icside_init(void);
3252 #endif /* CONFIG_BLK_DEV_IDE_ICSIDE */
3253 #ifdef CONFIG_BLK_DEV_IDE_RAPIDE
3255 extern void rapide_init(void);
3258 #endif /* CONFIG_BLK_DEV_IDE_RAPIDE */
3259 #ifdef CONFIG_BLK_DEV_GAYLE
3261 extern void gayle_init(void);
3264 #endif /* CONFIG_BLK_DEV_GAYLE */
3265 #ifdef CONFIG_BLK_DEV_FALCON_IDE
3267 extern void falconide_init(void);
3270 #endif /* CONFIG_BLK_DEV_FALCON_IDE */
3271 #ifdef CONFIG_BLK_DEV_MAC_IDE
3273 extern void macide_init(void);
3276 #endif /* CONFIG_BLK_DEV_MAC_IDE */
3277 #ifdef CONFIG_BLK_DEV_BUDDHA
3279 extern void buddha_init(void);
3282 #endif /* CONFIG_BLK_DEV_BUDDHA */
3285 void __init
ide_init_builtin_drivers (void)
3288 * Probe for special PCI and other "known" interface chipsets
3292 #ifdef CONFIG_BLK_DEV_IDE
3293 #if defined(__mc68000__) || defined(CONFIG_APUS)
3294 if (ide_hwifs
[0].io_ports
[IDE_DATA_OFFSET
]) {
3295 ide_get_lock(&ide_lock
, NULL
, NULL
); /* for atari only */
3296 disable_irq(ide_hwifs
[0].irq
);
3298 #endif /* __mc68000__ || CONFIG_APUS */
3300 (void) ideprobe_init();
3302 #if defined(__mc68000__) || defined(CONFIG_APUS)
3303 if (ide_hwifs
[0].io_ports
[IDE_DATA_OFFSET
]) {
3304 enable_irq(ide_hwifs
[0].irq
);
3305 ide_release_lock(&ide_lock
); /* for atari only */
3307 #endif /* __mc68000__ || CONFIG_APUS */
3308 #endif /* CONFIG_BLK_DEV_IDE */
3310 #ifdef CONFIG_PROC_FS
3315 * Attempt to match drivers for the available drives
3317 #ifdef CONFIG_BLK_DEV_IDEDISK
3318 (void) idedisk_init();
3319 #endif /* CONFIG_BLK_DEV_IDEDISK */
3320 #ifdef CONFIG_BLK_DEV_IDECD
3321 (void) ide_cdrom_init();
3322 #endif /* CONFIG_BLK_DEV_IDECD */
3323 #ifdef CONFIG_BLK_DEV_IDETAPE
3324 (void) idetape_init();
3325 #endif /* CONFIG_BLK_DEV_IDETAPE */
3326 #ifdef CONFIG_BLK_DEV_IDEFLOPPY
3327 (void) idefloppy_init();
3328 #endif /* CONFIG_BLK_DEV_IDEFLOPPY */
3329 #ifdef CONFIG_BLK_DEV_IDESCSI
3331 (void) idescsi_init();
3333 #warning ide scsi-emulation selected but no SCSI-subsystem in kernel
3335 #endif /* CONFIG_BLK_DEV_IDESCSI */
3338 static int default_cleanup (ide_drive_t
*drive
)
3340 return ide_unregister_subdriver(drive
);
3343 static void default_do_request(ide_drive_t
*drive
, struct request
*rq
, unsigned long block
)
3345 ide_end_request(0, HWGROUP(drive
));
3348 static void default_end_request (byte uptodate
, ide_hwgroup_t
*hwgroup
)
3350 ide_end_request(uptodate
, hwgroup
);
3353 static int default_ioctl (ide_drive_t
*drive
, struct inode
*inode
, struct file
*file
,
3354 unsigned int cmd
, unsigned long arg
)
3359 static int default_open (struct inode
*inode
, struct file
*filp
, ide_drive_t
*drive
)
3365 static void default_release (struct inode
*inode
, struct file
*filp
, ide_drive_t
*drive
)
3369 static int default_check_media_change (ide_drive_t
*drive
)
3374 static void default_pre_reset (ide_drive_t
*drive
)
3378 static unsigned long default_capacity (ide_drive_t
*drive
)
3380 return 0x7fffffff; /* cdrom or tape */
3383 static void default_special (ide_drive_t
*drive
)
3385 special_t
*s
= &drive
->special
;
3388 drive
->mult_req
= 0;
3391 static void setup_driver_defaults (ide_drive_t
*drive
)
3393 ide_driver_t
*d
= drive
->driver
;
3395 if (d
->cleanup
== NULL
) d
->cleanup
= default_cleanup
;
3396 if (d
->do_request
== NULL
) d
->do_request
= default_do_request
;
3397 if (d
->end_request
== NULL
) d
->end_request
= default_end_request
;
3398 if (d
->ioctl
== NULL
) d
->ioctl
= default_ioctl
;
3399 if (d
->open
== NULL
) d
->open
= default_open
;
3400 if (d
->release
== NULL
) d
->release
= default_release
;
3401 if (d
->media_change
== NULL
) d
->media_change
= default_check_media_change
;
3402 if (d
->pre_reset
== NULL
) d
->pre_reset
= default_pre_reset
;
3403 if (d
->capacity
== NULL
) d
->capacity
= default_capacity
;
3404 if (d
->special
== NULL
) d
->special
= default_special
;
3407 ide_drive_t
*ide_scan_devices (byte media
, const char *name
, ide_driver_t
*driver
, int n
)
3409 unsigned int unit
, index
, i
;
3411 for (index
= 0; index
< MAX_HWIFS
; ++index
)
3412 if (ide_hwifs
[index
].present
) goto search
;
3413 ide_init_module(IDE_PROBE_MODULE
);
3415 for (index
= 0, i
= 0; index
< MAX_HWIFS
; ++index
) {
3416 ide_hwif_t
*hwif
= &ide_hwifs
[index
];
3419 for (unit
= 0; unit
< MAX_DRIVES
; ++unit
) {
3420 ide_drive_t
*drive
= &hwif
->drives
[unit
];
3421 char *req
= drive
->driver_req
;
3422 if (*req
&& !strstr(name
, req
))
3424 if (drive
->present
&& drive
->media
== media
&& drive
->driver
== driver
&& ++i
> n
)
3431 int ide_register_subdriver (ide_drive_t
*drive
, ide_driver_t
*driver
, int version
)
3433 unsigned long flags
;
3435 save_flags(flags
); /* all CPUs */
3436 cli(); /* all CPUs */
3437 if (version
!= IDE_SUBDRIVER_VERSION
|| !drive
->present
|| drive
->driver
!= NULL
|| drive
->busy
|| drive
->usage
) {
3438 restore_flags(flags
); /* all CPUs */
3441 drive
->driver
= driver
;
3442 setup_driver_defaults(drive
);
3443 restore_flags(flags
); /* all CPUs */
3444 if (drive
->autotune
!= 2) {
3445 if (driver
->supports_dma
&& HWIF(drive
)->dmaproc
!= NULL
)
3446 (void) (HWIF(drive
)->dmaproc(ide_dma_check
, drive
));
3447 drive
->dsc_overlap
= (drive
->next
!= drive
&& driver
->supports_dsc_overlap
);
3450 drive
->revalidate
= 1;
3451 #ifdef CONFIG_PROC_FS
3452 ide_add_proc_entries(drive
->proc
, generic_subdriver_entries
, drive
);
3453 ide_add_proc_entries(drive
->proc
, driver
->proc
, drive
);
3458 int ide_unregister_subdriver (ide_drive_t
*drive
)
3460 unsigned long flags
;
3462 save_flags(flags
); /* all CPUs */
3463 cli(); /* all CPUs */
3464 if (drive
->usage
|| drive
->busy
|| drive
->driver
== NULL
|| DRIVER(drive
)->busy
) {
3465 restore_flags(flags
); /* all CPUs */
3468 #ifdef CONFIG_PROC_FS
3469 ide_remove_proc_entries(drive
->proc
, DRIVER(drive
)->proc
);
3470 ide_remove_proc_entries(drive
->proc
, generic_subdriver_entries
);
3472 auto_remove_settings(drive
);
3473 drive
->driver
= NULL
;
3474 restore_flags(flags
); /* all CPUs */
3478 int ide_register_module (ide_module_t
*module
)
3480 ide_module_t
*p
= ide_modules
;
3487 module
->next
= ide_modules
;
3488 ide_modules
= module
;
3489 revalidate_drives();
3493 void ide_unregister_module (ide_module_t
*module
)
3497 for (p
= &ide_modules
; (*p
) && (*p
) != module
; p
= &((*p
)->next
));
3502 struct file_operations ide_fops
[] = {{
3503 NULL
, /* lseek - default */
3504 block_read
, /* read - general block-dev read */
3505 block_write
, /* write - general block-dev write */
3506 NULL
, /* readdir - bad */
3508 ide_ioctl
, /* ioctl */
3510 ide_open
, /* open */
3512 ide_release
, /* release */
3513 block_fsync
, /* fsync */
3515 ide_check_media_change
, /* check_media_change */
3516 ide_revalidate_disk
/* revalidate */
3519 EXPORT_SYMBOL(ide_hwifs
);
3520 EXPORT_SYMBOL(ide_register_module
);
3521 EXPORT_SYMBOL(ide_unregister_module
);
3522 EXPORT_SYMBOL(ide_spin_wait_hwgroup
);
3527 EXPORT_SYMBOL(drive_is_flashcard
);
3528 EXPORT_SYMBOL(ide_timer_expiry
);
3529 EXPORT_SYMBOL(ide_intr
);
3530 EXPORT_SYMBOL(ide_geninit
);
3531 EXPORT_SYMBOL(ide_fops
);
3532 EXPORT_SYMBOL(ide_get_queue
);
3533 EXPORT_SYMBOL(do_ide0_request
);
3534 EXPORT_SYMBOL(ide_add_generic_settings
);
3536 EXPORT_SYMBOL(do_ide1_request
);
3537 #endif /* MAX_HWIFS > 1 */
3539 EXPORT_SYMBOL(do_ide2_request
);
3540 #endif /* MAX_HWIFS > 2 */
3542 EXPORT_SYMBOL(do_ide3_request
);
3543 #endif /* MAX_HWIFS > 3 */
3545 EXPORT_SYMBOL(do_ide4_request
);
3546 #endif /* MAX_HWIFS > 4 */
3548 EXPORT_SYMBOL(do_ide5_request
);
3549 #endif /* MAX_HWIFS > 5 */
3551 EXPORT_SYMBOL(do_ide6_request
);
3552 #endif /* MAX_HWIFS > 6 */
3554 EXPORT_SYMBOL(do_ide7_request
);
3555 #endif /* MAX_HWIFS > 7 */
3557 EXPORT_SYMBOL(do_ide8_request
);
3558 #endif /* MAX_HWIFS > 8 */
3560 EXPORT_SYMBOL(do_ide9_request
);
3561 #endif /* MAX_HWIFS > 9 */
3566 EXPORT_SYMBOL(ide_scan_devices
);
3567 EXPORT_SYMBOL(ide_register_subdriver
);
3568 EXPORT_SYMBOL(ide_unregister_subdriver
);
3569 EXPORT_SYMBOL(ide_replace_subdriver
);
3570 EXPORT_SYMBOL(ide_input_data
);
3571 EXPORT_SYMBOL(ide_output_data
);
3572 EXPORT_SYMBOL(atapi_input_bytes
);
3573 EXPORT_SYMBOL(atapi_output_bytes
);
3574 EXPORT_SYMBOL(ide_set_handler
);
3575 EXPORT_SYMBOL(ide_dump_status
);
3576 EXPORT_SYMBOL(ide_error
);
3577 EXPORT_SYMBOL(ide_fixstring
);
3578 EXPORT_SYMBOL(ide_wait_stat
);
3579 EXPORT_SYMBOL(ide_do_reset
);
3580 EXPORT_SYMBOL(ide_init_drive_cmd
);
3581 EXPORT_SYMBOL(ide_do_drive_cmd
);
3582 EXPORT_SYMBOL(ide_end_drive_cmd
);
3583 EXPORT_SYMBOL(ide_end_request
);
3584 EXPORT_SYMBOL(ide_revalidate_disk
);
3585 EXPORT_SYMBOL(ide_cmd
);
3586 EXPORT_SYMBOL(ide_wait_cmd
);
3587 EXPORT_SYMBOL(ide_delay_50ms
);
3588 EXPORT_SYMBOL(ide_config_drive_speed
);
3589 EXPORT_SYMBOL(ide_stall_queue
);
3590 #ifdef CONFIG_PROC_FS
3591 EXPORT_SYMBOL(ide_add_proc_entries
);
3592 EXPORT_SYMBOL(ide_remove_proc_entries
);
3593 EXPORT_SYMBOL(proc_ide_read_geometry
);
3594 EXPORT_SYMBOL(create_proc_ide_interfaces
);
3596 EXPORT_SYMBOL(ide_add_setting
);
3597 EXPORT_SYMBOL(ide_remove_setting
);
3599 EXPORT_SYMBOL(ide_register_hw
);
3600 EXPORT_SYMBOL(ide_register
);
3601 EXPORT_SYMBOL(ide_unregister
);
3602 EXPORT_SYMBOL(ide_setup_ports
);
3604 EXPORT_SYMBOL(get_info_ptr
);
3605 EXPORT_SYMBOL(current_capacity
);
3608 * This is gets invoked once during initialization, to set *everything* up
3610 int __init
ide_init (void)
3612 static char banner_printed
= 0;
3614 if (!banner_printed
) {
3615 printk(KERN_INFO
"Uniform Multi-Platform E-IDE driver " REVISION
"\n");
3622 ide_init_builtin_drivers();
3629 char *options
= NULL
;
3630 MODULE_PARM(options
,"s");
3632 static void __init
parse_options (char *line
)
3636 if (line
== NULL
|| !*line
)
3638 while ((line
= next
) != NULL
) {
3639 if ((next
= strchr(line
,' ')) != NULL
)
3641 if (!strncmp(line
,"ide",3) ||
3642 #ifdef CONFIG_BLK_DEV_VIA82CXXX
3643 !strncmp(line
,"splitfifo",9) ||
3644 #endif /* CONFIG_BLK_DEV_VIA82CXXX */
3645 (!strncmp(line
,"hd",2) && line
[2] != '='))
3650 int init_module (void)
3652 parse_options(options
);
3656 void cleanup_module (void)
3660 for (index
= 0; index
< MAX_HWIFS
; ++index
) {
3661 ide_unregister(index
);
3662 #ifdef CONFIG_BLK_DEV_IDEDMA
3663 if (ide_hwifs
[index
].dma_base
)
3664 (void) ide_release_dma(&ide_hwifs
[index
]);
3665 #endif /* CONFIG_BLK_DEV_IDEDMA */
3667 #ifdef CONFIG_PROC_FS