1 /*
2 * linux/drivers/ide/ide.c Version 6.31 June 9, 2000
3 *
4 * Copyright (C) 1994-1998 Linus Torvalds & authors (see below)
5 */
6
7 /*
8 * Mostly written by Mark Lord <mlord@pobox.com>
9 * and Gadi Oxman <gadio@netvision.net.il>
10 * and Andre Hedrick <andre@linux-ide.org>
11 *
12 * See linux/MAINTAINERS for address of current maintainer.
13 *
14 * This is the multiple IDE interface driver, as evolved from hd.c.
15 * It supports up to MAX_HWIFS IDE interfaces, on one or more IRQs (usually 14 & 15).
16 * There can be up to two drives per interface, as per the ATA-2 spec.
17 *
18 * Primary: ide0, port 0x1f0; major=3; hda is minor=0; hdb is minor=64
19 * Secondary: ide1, port 0x170; major=22; hdc is minor=0; hdd is minor=64
20 * Tertiary: ide2, port 0x???; major=33; hde is minor=0; hdf is minor=64
21 * Quaternary: ide3, port 0x???; major=34; hdg is minor=0; hdh is minor=64
22 * ...
23 *
24 * From hd.c:
25 * |
26 * | It traverses the request-list, using interrupts to jump between functions.
27 * | As nearly all functions can be called within interrupts, we may not sleep.
28 * | Special care is recommended. Have Fun!
29 * |
30 * | modified by Drew Eckhardt to check nr of hd's from the CMOS.
31 * |
32 * | Thanks to Branko Lankester, lankeste@fwi.uva.nl, who found a bug
33 * | in the early extended-partition checks and added DM partitions.
34 * |
35 * | Early work on error handling by Mika Liljeberg (liljeber@cs.Helsinki.FI).
36 * |
37 * | IRQ-unmask, drive-id, multiple-mode, support for ">16 heads",
38 * | and general streamlining by Mark Lord (mlord@pobox.com).
39 *
40 * October, 1994 -- Complete line-by-line overhaul for linux 1.1.x, by:
41 *
42 * Mark Lord (mlord@pobox.com) (IDE Perf.Pkg)
43 * Delman Lee (delman@ieee.org) ("Mr. atdisk2")
44 * Scott Snyder (snyder@fnald0.fnal.gov) (ATAPI IDE cd-rom)
45 *
46 * This was a rewrite of just about everything from hd.c, though some original
47 * code is still sprinkled about. Think of it as a major evolution, with
48 * inspiration from lots of linux users, esp. hamish@zot.apana.org.au
49 *
50 * Version 1.0 ALPHA initial code, primary i/f working okay
51 * Version 1.3 BETA dual i/f on shared irq tested & working!
52 * Version 1.4 BETA added auto probing for irq(s)
53 * Version 1.5 BETA added ALPHA (untested) support for IDE cd-roms,
54 * ...
55 * Version 5.50 allow values as small as 20 for idebus=
56 * Version 5.51 force non io_32bit in drive_cmd_intr()
57 * change delay_10ms() to delay_50ms() to fix problems
58 * Version 5.52 fix incorrect invalidation of removable devices
59 * add "hdx=slow" command line option
60 * Version 5.60 start to modularize the driver; the disk and ATAPI
61 * drivers can be compiled as loadable modules.
62 * move IDE probe code to ide-probe.c
63 * move IDE disk code to ide-disk.c
64 * add support for generic IDE device subdrivers
65 * add m68k code from Geert Uytterhoeven
66 * probe all interfaces by default
67 * add ioctl to (re)probe an interface
68 * Version 6.00 use per device request queues
69 * attempt to optimize shared hwgroup performance
70 * add ioctl to manually adjust bandwidth algorithms
71 * add kerneld support for the probe module
72 * fix bug in ide_error()
73 * fix bug in the first ide_get_lock() call for Atari
74 * don't flush leftover data for ATAPI devices
75 * Version 6.01 clear hwgroup->active while the hwgroup sleeps
76 * support HDIO_GETGEO for floppies
77 * Version 6.02 fix ide_ack_intr() call
78 * check partition table on floppies
79 * Version 6.03 handle bad status bit sequencing in ide_wait_stat()
80 * Version 6.10 deleted old entries from this list of updates
81 * replaced triton.c with ide-dma.c generic PCI DMA
82 * added support for BIOS-enabled UltraDMA
83 * rename all "promise" things to "pdc4030"
84 * fix EZ-DRIVE handling on small disks
85 * Version 6.11 fix probe error in ide_scan_devices()
86 * fix ancient "jiffies" polling bugs
87 * mask all hwgroup interrupts on each irq entry
88 * Version 6.12 integrate ioctl and proc interfaces
89 * fix parsing of "idex=" command line parameter
90 * Version 6.13 add support for ide4/ide5 courtesy rjones@orchestream.com
91 * Version 6.14 fixed IRQ sharing among PCI devices
92 * Version 6.15 added SMP awareness to IDE drivers
93 * Version 6.16 fixed various bugs; even more SMP friendly
94 * Version 6.17 fix for newest EZ-Drive problem
95 * Version 6.18 default unpartitioned-disk translation now "BIOS LBA"
96 * Version 6.19 Re-design for a UNIFORM driver for all platforms,
97 * model based on suggestions from Russell King and
98 * Geert Uytterhoeven
99 * Promise DC4030VL now supported.
100 * add support for ide6/ide7
101 * delay_50ms() changed to ide_delay_50ms() and exported.
102 * Version 6.20 Added/Fixed Generic ATA-66 support and hwif detection.
103 * Added hdx=flash to allow for second flash disk
104 * detection w/o the hang loop.
105 * Added support for ide8/ide9
106 * Added idex=ata66 for the quirky chipsets that are
107 * ATA-66 compliant, but have yet to determine a method
108 * of verification of the 80c cable presence.
109 * Specifically Promise's PDC20262 chipset.
110 * Version 6.21 Fixing/Fixed SMP spinlock issue with insight from an old
111 * hat that clarified original low level driver design.
112 * Version 6.30 Added SMP support; fixed multmode issues. -ml
113 * Version 6.31 Debug Share INTR's and request queue streaming
114 * Native ATA-100 support
115 * Prep for Cascades Project
116 *
117 * Some additional driver compile-time options are in ./include/linux/ide.h
118 *
119 * To do, in likely order of completion:
120 * - modify kernel to obtain BIOS geometry for drives on 2nd/3rd/4th i/f
121 *
122 */
123
124 #define REVISION "Revision: 6.31"
125 #define VERSION "Id: ide.c 6.31 2000/06/09"
126
127 #undef REALLY_SLOW_IO /* most systems can safely undef this */
128
129 #define _IDE_C /* Tell ide.h it's really us */
130
131 #include <linux/config.h>
132 #include <linux/module.h>
133 #include <linux/types.h>
134 #include <linux/string.h>
135 #include <linux/kernel.h>
136 #include <linux/timer.h>
137 #include <linux/mm.h>
138 #include <linux/interrupt.h>
139 #include <linux/major.h>
140 #include <linux/errno.h>
141 #include <linux/genhd.h>
142 #include <linux/blkpg.h>
143 #include <linux/malloc.h>
144 #ifndef MODULE
145 #include <linux/init.h>
146 #endif /* MODULE */
147 #include <linux/pci.h>
148 #include <linux/delay.h>
149 #include <linux/ide.h>
150 #include <linux/devfs_fs_kernel.h>
151
152 #include <asm/byteorder.h>
153 #include <asm/irq.h>
154 #include <asm/uaccess.h>
155 #include <asm/io.h>
156 #include <asm/bitops.h>
157
158 #include "ide_modes.h"
159
160 #ifdef CONFIG_KMOD
161 #include <linux/kmod.h>
162 #endif /* CONFIG_KMOD */
163
164 static const byte ide_hwif_to_major[] = { IDE0_MAJOR, IDE1_MAJOR, IDE2_MAJOR, IDE3_MAJOR, IDE4_MAJOR, IDE5_MAJOR, IDE6_MAJOR, IDE7_MAJOR, IDE8_MAJOR, IDE9_MAJOR };
165
166 static int idebus_parameter; /* holds the "idebus=" parameter */
167 static int system_bus_speed; /* holds what we think is VESA/PCI bus speed */
168 static int initializing; /* set while initializing built-in drivers */
169
170 #ifdef CONFIG_BLK_DEV_IDEPCI
171 static int ide_scan_direction; /* THIS was formerly 2.2.x pci=reverse */
172 #endif /* CONFIG_BLK_DEV_IDEPCI */
173
174 #if defined(__mc68000__) || defined(CONFIG_APUS)
175 /*
176 * ide_lock is used by the Atari code to obtain access to the IDE interrupt,
177 * which is shared between several drivers.
178 */
179 static int ide_lock;
180 #endif /* __mc68000__ || CONFIG_APUS */
181
182 /*
183 * ide_modules keeps track of the available IDE chipset/probe/driver modules.
184 */
185 ide_module_t *ide_modules;
186 ide_module_t *ide_probe;
187
188 /*
189 * This is declared extern in ide.h, for access by other IDE modules:
190 */
191 ide_hwif_t ide_hwifs[MAX_HWIFS]; /* master data repository */
192
193 #if (DISK_RECOVERY_TIME > 0)
194 /*
195 * For really screwy hardware (hey, at least it *can* be used with Linux)
196 * we can enforce a minimum delay time between successive operations.
197 */
198 static unsigned long read_timer (void)
199 {
200 unsigned long t, flags;
201 int i;
202
203 __save_flags(flags); /* local CPU only */
204 __cli(); /* local CPU only */
205 t = jiffies * 11932;
206 outb_p(0, 0x43);
207 i = inb_p(0x40);
208 i |= inb(0x40) << 8;
209 __restore_flags(flags); /* local CPU only */
210 return (t - i);
211 }
212 #endif /* DISK_RECOVERY_TIME */
213
214 static inline void set_recovery_timer (ide_hwif_t *hwif)
215 {
216 #if (DISK_RECOVERY_TIME > 0)
217 hwif->last_time = read_timer();
218 #endif /* DISK_RECOVERY_TIME */
219 }
220
221 /*
222 * Do not even *think* about calling this!
223 */
224 static void init_hwif_data (unsigned int index)
225 {
226 unsigned int unit;
227 hw_regs_t hw;
228 ide_hwif_t *hwif = &ide_hwifs[index];
229
230 /* bulk initialize hwif & drive info with zeros */
231 memset(hwif, 0, sizeof(ide_hwif_t));
232 memset(&hw, 0, sizeof(hw_regs_t));
233
234 /* fill in any non-zero initial values */
235 hwif->index = index;
236 ide_init_hwif_ports(&hw, ide_default_io_base(index), 0, &hwif->irq);
237 memcpy(&hwif->hw, &hw, sizeof(hw));
238 memcpy(hwif->io_ports, hw.io_ports, sizeof(hw.io_ports));
239 hwif->noprobe = !hwif->io_ports[IDE_DATA_OFFSET];
240 #ifdef CONFIG_BLK_DEV_HD
241 if (hwif->io_ports[IDE_DATA_OFFSET] == HD_DATA)
242 hwif->noprobe = 1; /* may be overridden by ide_setup() */
243 #endif /* CONFIG_BLK_DEV_HD */
244 hwif->major = ide_hwif_to_major[index];
245 hwif->name[0] = 'i';
246 hwif->name[1] = 'd';
247 hwif->name[2] = 'e';
248 hwif->name[3] = '' + index;
249 for (unit = 0; unit < MAX_DRIVES; ++unit) {
250 ide_drive_t *drive = &hwif->drives[unit];
251
252 drive->media = ide_disk;
253 drive->select.all = (unit<<4)|0xa0;
254 drive->hwif = hwif;
255 drive->ctl = 0x08;
256 drive->ready_stat = READY_STAT;
257 drive->bad_wstat = BAD_W_STAT;
258 drive->special.b.recalibrate = 1;
259 drive->special.b.set_geometry = 1;
260 drive->name[0] = 'h';
261 drive->name[1] = 'd';
262 drive->name[2] = 'a' + (index * MAX_DRIVES) + unit;
263 init_waitqueue_head(&drive->wqueue);
264 }
265 }
266
267 /*
268 * init_ide_data() sets reasonable default values into all fields
269 * of all instances of the hwifs and drives, but only on the first call.
270 * Subsequent calls have no effect (they don't wipe out anything).
271 *
272 * This routine is normally called at driver initialization time,
273 * but may also be called MUCH earlier during kernel "command-line"
274 * parameter processing. As such, we cannot depend on any other parts
275 * of the kernel (such as memory allocation) to be functioning yet.
276 *
277 * This is too bad, as otherwise we could dynamically allocate the
278 * ide_drive_t structs as needed, rather than always consuming memory
279 * for the max possible number (MAX_HWIFS * MAX_DRIVES) of them.
280 */
281 #define MAGIC_COOKIE 0x12345678
282 static void __init init_ide_data (void)
283 {
284 unsigned int index;
285 static unsigned long magic_cookie = MAGIC_COOKIE;
286
287 if (magic_cookie != MAGIC_COOKIE)
288 return; /* already initialized */
289 magic_cookie = 0;
290
291 /* Initialise all interface structures */
292 for (index = 0; index < MAX_HWIFS; ++index)
293 init_hwif_data(index);
294
295 /* Add default hw interfaces */
296 ide_init_default_hwifs();
297
298 idebus_parameter = 0;
299 system_bus_speed = 0;
300 }
301
302 /*
303 * CompactFlash cards and their brethern pretend to be removable hard disks, except:
304 * (1) they never have a slave unit, and
305 * (2) they don't have doorlock mechanisms.
306 * This test catches them, and is invoked elsewhere when setting appropriate config bits.
307 *
308 * FIXME: This treatment is probably applicable for *all* PCMCIA (PC CARD) devices,
309 * so in linux 2.3.x we should change this to just treat all PCMCIA drives this way,
310 * and get rid of the model-name tests below (too big of an interface change for 2.2.x).
311 * At that time, we might also consider parameterizing the timeouts and retries,
312 * since these are MUCH faster than mechanical drives. -M.Lord
313 */
314 int drive_is_flashcard (ide_drive_t *drive)
315 {
316 struct hd_driveid *id = drive->id;
317
318 if (drive->removable && id != NULL) {
319 if (id->config == 0x848a) return 1; /* CompactFlash */
320 if (!strncmp(id->model, "KODAK ATA_FLASH", 15) /* Kodak */
321 || !strncmp(id->model, "Hitachi CV", 10) /* Hitachi */
322 || !strncmp(id->model, "SunDisk SDCFB", 13) /* SunDisk */
323 || !strncmp(id->model, "HAGIWARA HPC", 12) /* Hagiwara */
324 || !strncmp(id->model, "LEXAR ATA_FLASH", 15) /* Lexar */
325 || !strncmp(id->model, "ATA_FLASH", 9)) /* Simple Tech */
326 {
327 return 1; /* yes, it is a flash memory card */
328 }
329 }
330 return 0; /* no, it is not a flash memory card */
331 }
332
333 /*
334 * ide_system_bus_speed() returns what we think is the system VESA/PCI
335 * bus speed (in MHz). This is used for calculating interface PIO timings.
336 * The default is 40 for known PCI systems, 50 otherwise.
337 * The "idebus=xx" parameter can be used to override this value.
338 * The actual value to be used is computed/displayed the first time through.
339 */
340 int ide_system_bus_speed (void)
341 {
342 if (!system_bus_speed) {
343 if (idebus_parameter)
344 system_bus_speed = idebus_parameter; /* user supplied value */
345 #ifdef CONFIG_PCI
346 else if (pci_present())
347 system_bus_speed = 33; /* safe default value for PCI */
348 #endif /* CONFIG_PCI */
349 else
350 system_bus_speed = 50; /* safe default value for VESA and PCI */
351 printk("ide: Assuming %dMHz system bus speed for PIO modes%s\n", system_bus_speed,
352 idebus_parameter ? "" : "; override with idebus=xx");
353 }
354 return system_bus_speed;
355 }
356
357 #if SUPPORT_VLB_SYNC
358 /*
359 * Some localbus EIDE interfaces require a special access sequence
360 * when using 32-bit I/O instructions to transfer data. We call this
361 * the "vlb_sync" sequence, which consists of three successive reads
362 * of the sector count register location, with interrupts disabled
363 * to ensure that the reads all happen together.
364 */
365 static inline void do_vlb_sync (ide_ioreg_t port) {
366 (void) inb (port);
367 (void) inb (port);
368 (void) inb (port);
369 }
370 #endif /* SUPPORT_VLB_SYNC */
371
372 /*
373 * This is used for most PIO data transfers *from* the IDE interface
374 */
375 void ide_input_data (ide_drive_t *drive, void *buffer, unsigned int wcount)
376 {
377 byte io_32bit = drive->io_32bit;
378
379 if (io_32bit) {
380 #if SUPPORT_VLB_SYNC
381 if (io_32bit & 2) {
382 unsigned long flags;
383 __save_flags(flags); /* local CPU only */
384 __cli(); /* local CPU only */
385 do_vlb_sync(IDE_NSECTOR_REG);
386 insl(IDE_DATA_REG, buffer, wcount);
387 __restore_flags(flags); /* local CPU only */
388 } else
389 #endif /* SUPPORT_VLB_SYNC */
390 insl(IDE_DATA_REG, buffer, wcount);
391 } else {
392 #if SUPPORT_SLOW_DATA_PORTS
393 if (drive->slow) {
394 unsigned short *ptr = (unsigned short *) buffer;
395 while (wcount--) {
396 *ptr++ = inw_p(IDE_DATA_REG);
397 *ptr++ = inw_p(IDE_DATA_REG);
398 }
399 } else
400 #endif /* SUPPORT_SLOW_DATA_PORTS */
401 insw(IDE_DATA_REG, buffer, wcount<<1);
402 }
403 }
404
405 /*
406 * This is used for most PIO data transfers *to* the IDE interface
407 */
408 void ide_output_data (ide_drive_t *drive, void *buffer, unsigned int wcount)
409 {
410 byte io_32bit = drive->io_32bit;
411
412 if (io_32bit) {
413 #if SUPPORT_VLB_SYNC
414 if (io_32bit & 2) {
415 unsigned long flags;
416 __save_flags(flags); /* local CPU only */
417 __cli(); /* local CPU only */
418 do_vlb_sync(IDE_NSECTOR_REG);
419 outsl(IDE_DATA_REG, buffer, wcount);
420 __restore_flags(flags); /* local CPU only */
421 } else
422 #endif /* SUPPORT_VLB_SYNC */
423 outsl(IDE_DATA_REG, buffer, wcount);
424 } else {
425 #if SUPPORT_SLOW_DATA_PORTS
426 if (drive->slow) {
427 unsigned short *ptr = (unsigned short *) buffer;
428 while (wcount--) {
429 outw_p(*ptr++, IDE_DATA_REG);
430 outw_p(*ptr++, IDE_DATA_REG);
431 }
432 } else
433 #endif /* SUPPORT_SLOW_DATA_PORTS */
434 outsw(IDE_DATA_REG, buffer, wcount<<1);
435 }
436 }
437
438 /*
439 * The following routines are mainly used by the ATAPI drivers.
440 *
441 * These routines will round up any request for an odd number of bytes,
442 * so if an odd bytecount is specified, be sure that there's at least one
443 * extra byte allocated for the buffer.
444 */
445 void atapi_input_bytes (ide_drive_t *drive, void *buffer, unsigned int bytecount)
446 {
447 ++bytecount;
448 #if defined(CONFIG_ATARI) || defined(CONFIG_Q40)
449 if (MACH_IS_ATARI || MACH_IS_Q40) {
450 /* Atari has a byte-swapped IDE interface */
451 insw_swapw(IDE_DATA_REG, buffer, bytecount / 2);
452 return;
453 }
454 #endif /* CONFIG_ATARI */
455 ide_input_data (drive, buffer, bytecount / 4);
456 if ((bytecount & 0x03) >= 2)
457 insw (IDE_DATA_REG, ((byte *)buffer) + (bytecount & ~0x03), 1);
458 }
459
460 void atapi_output_bytes (ide_drive_t *drive, void *buffer, unsigned int bytecount)
461 {
462 ++bytecount;
463 #if defined(CONFIG_ATARI) || defined(CONFIG_Q40)
464 if (MACH_IS_ATARI || MACH_IS_Q40) {
465 /* Atari has a byte-swapped IDE interface */
466 outsw_swapw(IDE_DATA_REG, buffer, bytecount / 2);
467 return;
468 }
469 #endif /* CONFIG_ATARI */
470 ide_output_data (drive, buffer, bytecount / 4);
471 if ((bytecount & 0x03) >= 2)
472 outsw (IDE_DATA_REG, ((byte *)buffer) + (bytecount & ~0x03), 1);
473 }
474
475 /*
476 * Needed for PCI irq sharing
477 */
478 static inline int drive_is_ready (ide_drive_t *drive)
479 {
480 byte stat = 0;
481 if (drive->waiting_for_dma)
482 return HWIF(drive)->dmaproc(ide_dma_test_irq, drive);
483 #if 0
484 udelay(1); /* need to guarantee 400ns since last command was issued */
485 #endif
486
487 #ifdef CONFIG_IDEPCI_SHARE_IRQ
488 /*
489 * We do a passive status test under shared PCI interrupts on
490 * cards that truly share the ATA side interrupt, but may also share
491 * an interrupt with another pci card/device. We make no assumptions
492 * about possible isa-pnp and pci-pnp issues yet.
493 */
494 if (IDE_CONTROL_REG)
495 stat = GET_ALTSTAT();
496 else
497 #endif /* CONFIG_IDEPCI_SHARE_IRQ */
498 stat = GET_STAT(); /* Note: this may clear a pending IRQ!! */
499
500 if (stat & BUSY_STAT)
501 return 0; /* drive busy: definitely not interrupting */
502 return 1; /* drive ready: *might* be interrupting */
503 }
504
505 /*
506 * This is our end_request replacement function.
507 */
508 void ide_end_request (byte uptodate, ide_hwgroup_t *hwgroup)
509 {
510 struct request *rq;
511 unsigned long flags;
512
513 spin_lock_irqsave(&io_request_lock, flags);
514 rq = hwgroup->rq;
515
516 if (!end_that_request_first(rq, uptodate, hwgroup->drive->name)) {
517 add_blkdev_randomness(MAJOR(rq->rq_dev));
518 blkdev_dequeue_request(rq);
519 hwgroup->rq = NULL;
520 end_that_request_last(rq);
521 }
522 spin_unlock_irqrestore(&io_request_lock, flags);
523 }
524
525 /*
526 * This should get invoked any time we exit the driver to
527 * wait for an interrupt response from a drive. handler() points
528 * at the appropriate code to handle the next interrupt, and a
529 * timer is started to prevent us from waiting forever in case
530 * something goes wrong (see the ide_timer_expiry() handler later on).
531 */
532 void ide_set_handler (ide_drive_t *drive, ide_handler_t *handler,
533 unsigned int timeout, ide_expiry_t *expiry)
534 {
535 unsigned long flags;
536 ide_hwgroup_t *hwgroup = HWGROUP(drive);
537
538 spin_lock_irqsave(&io_request_lock, flags);
539 if (hwgroup->handler != NULL) {
540 printk("%s: ide_set_handler: handler not null; old=%p, new=%p\n",
541 drive->name, hwgroup->handler, handler);
542 }
543 hwgroup->handler = handler;
544 hwgroup->expiry = expiry;
545 hwgroup->timer.expires = jiffies + timeout;
546 add_timer(&hwgroup->timer);
547 spin_unlock_irqrestore(&io_request_lock, flags);
548 }
549
550 /*
551 * current_capacity() returns the capacity (in sectors) of a drive
552 * according to its current geometry/LBA settings.
553 */
554 unsigned long current_capacity (ide_drive_t *drive)
555 {
556 if (!drive->present)
557 return 0;
558 if (drive->driver != NULL)
559 return DRIVER(drive)->capacity(drive);
560 return 0;
561 }
562
563 extern struct block_device_operations ide_fops[];
564 /*
565 * ide_geninit() is called exactly *once* for each interface.
566 */
567 void ide_geninit (ide_hwif_t *hwif)
568 {
569 unsigned int unit;
570 struct gendisk *gd = hwif->gd;
571
572 for (unit = 0; unit < MAX_DRIVES; ++unit) {
573 ide_drive_t *drive = &hwif->drives[unit];
574
575 if (!drive->present)
576 continue;
577 if (drive->media!=ide_disk && drive->media!=ide_floppy)
578 continue;
579 register_disk(gd,MKDEV(hwif->major,unit<<PARTN_BITS),
580 #ifdef CONFIG_BLK_DEV_ISAPNP
581 (drive->forced_geom && drive->noprobe) ? 1 :
582 #endif /* CONFIG_BLK_DEV_ISAPNP */
583 1<<PARTN_BITS, ide_fops,
584 current_capacity(drive));
585 }
586 }
587
588 static ide_startstop_t do_reset1 (ide_drive_t *, int); /* needed below */
589
590 /*
591 * atapi_reset_pollfunc() gets invoked to poll the interface for completion every 50ms
592 * during an atapi drive reset operation. If the drive has not yet responded,
593 * and we have not yet hit our maximum waiting time, then the timer is restarted
594 * for another 50ms.
595 */
596 static ide_startstop_t atapi_reset_pollfunc (ide_drive_t *drive)
597 {
598 ide_hwgroup_t *hwgroup = HWGROUP(drive);
599 byte stat;
600
601 SELECT_DRIVE(HWIF(drive),drive);
602 udelay (10);
603
604 if (OK_STAT(stat=GET_STAT(), 0, BUSY_STAT)) {
605 printk("%s: ATAPI reset complete\n", drive->name);
606 } else {
607 if (0 < (signed long)(hwgroup->poll_timeout - jiffies)) {
608 ide_set_handler (drive, &atapi_reset_pollfunc, HZ/20, NULL);
609 return ide_started; /* continue polling */
610 }
611 hwgroup->poll_timeout = 0; /* end of polling */
612 printk("%s: ATAPI reset timed-out, status=0x%02x\n", drive->name, stat);
613 return do_reset1 (drive, 1); /* do it the old fashioned way */
614 }
615 hwgroup->poll_timeout = 0; /* done polling */
616 return ide_stopped;
617 }
618
619 /*
620 * reset_pollfunc() gets invoked to poll the interface for completion every 50ms
621 * during an ide reset operation. If the drives have not yet responded,
622 * and we have not yet hit our maximum waiting time, then the timer is restarted
623 * for another 50ms.
624 */
625 static ide_startstop_t reset_pollfunc (ide_drive_t *drive)
626 {
627 ide_hwgroup_t *hwgroup = HWGROUP(drive);
628 ide_hwif_t *hwif = HWIF(drive);
629 byte tmp;
630
631 if (!OK_STAT(tmp=GET_STAT(), 0, BUSY_STAT)) {
632 if (0 < (signed long)(hwgroup->poll_timeout - jiffies)) {
633 ide_set_handler (drive, &reset_pollfunc, HZ/20, NULL);
634 return ide_started; /* continue polling */
635 }
636 printk("%s: reset timed-out, status=0x%02x\n", hwif->name, tmp);
637 } else {
638 printk("%s: reset: ", hwif->name);
639 if ((tmp = GET_ERR()) == 1)
640 printk("success\n");
641 else {
642 #if FANCY_STATUS_DUMPS
643 printk("master: ");
644 switch (tmp & 0x7f) {
645 case 1: printk("passed");
646 break;
647 case 2: printk("formatter device error");
648 break;
649 case 3: printk("sector buffer error");
650 break;
651 case 4: printk("ECC circuitry error");
652 break;
653 case 5: printk("controlling MPU error");
654 break;
655 default:printk("error (0x%02x?)", tmp);
656 }
657 if (tmp & 0x80)
658 printk("; slave: failed");
659 printk("\n");
660 #else
661 printk("failed\n");
662 #endif /* FANCY_STATUS_DUMPS */
663 }
664 }
665 hwgroup->poll_timeout = 0; /* done polling */
666 return ide_stopped;
667 }
668
669 static void check_dma_crc (ide_drive_t *drive)
670 {
671 if (drive->crc_count) {
672 (void) HWIF(drive)->dmaproc(ide_dma_off_quietly, drive);
673 if ((HWIF(drive)->speedproc) != NULL)
674 HWIF(drive)->speedproc(drive, ide_auto_reduce_xfer(drive));
675 if (drive->current_speed >= XFER_SW_DMA_0)
676 (void) HWIF(drive)->dmaproc(ide_dma_on, drive);
677 } else {
678 (void) HWIF(drive)->dmaproc(ide_dma_off, drive);
679 }
680 }
681
682 static void pre_reset (ide_drive_t *drive)
683 {
684 if (drive->driver != NULL)
685 DRIVER(drive)->pre_reset(drive);
686
687 if (!drive->keep_settings) {
688 if (drive->using_dma) {
689 check_dma_crc(drive);
690 } else {
691 drive->unmask = 0;
692 drive->io_32bit = 0;
693 }
694 return;
695 }
696 if (drive->using_dma)
697 check_dma_crc(drive);
698 }
699
700 /*
701 * do_reset1() attempts to recover a confused drive by resetting it.
702 * Unfortunately, resetting a disk drive actually resets all devices on
703 * the same interface, so it can really be thought of as resetting the
704 * interface rather than resetting the drive.
705 *
706 * ATAPI devices have their own reset mechanism which allows them to be
707 * individually reset without clobbering other devices on the same interface.
708 *
709 * Unfortunately, the IDE interface does not generate an interrupt to let
710 * us know when the reset operation has finished, so we must poll for this.
711 * Equally poor, though, is the fact that this may a very long time to complete,
712 * (up to 30 seconds worstcase). So, instead of busy-waiting here for it,
713 * we set a timer to poll at 50ms intervals.
714 */
715 static ide_startstop_t do_reset1 (ide_drive_t *drive, int do_not_try_atapi)
716 {
717 unsigned int unit;
718 unsigned long flags;
719 ide_hwif_t *hwif = HWIF(drive);
720 ide_hwgroup_t *hwgroup = HWGROUP(drive);
721
722 __save_flags(flags); /* local CPU only */
723 __cli(); /* local CPU only */
724
725 /* For an ATAPI device, first try an ATAPI SRST. */
726 if (drive->media != ide_disk && !do_not_try_atapi) {
727 pre_reset(drive);
728 SELECT_DRIVE(hwif,drive);
729 udelay (20);
730 OUT_BYTE (WIN_SRST, IDE_COMMAND_REG);
731 hwgroup->poll_timeout = jiffies + WAIT_WORSTCASE;
732 ide_set_handler (drive, &atapi_reset_pollfunc, HZ/20, NULL);
733 __restore_flags (flags); /* local CPU only */
734 return ide_started;
735 }
736
737 /*
738 * First, reset any device state data we were maintaining
739 * for any of the drives on this interface.
740 */
741 for (unit = 0; unit < MAX_DRIVES; ++unit)
742 pre_reset(&hwif->drives[unit]);
743
744 #if OK_TO_RESET_CONTROLLER
745 if (!IDE_CONTROL_REG) {
746 __restore_flags(flags);
747 return ide_stopped;
748 }
749 /*
750 * Note that we also set nIEN while resetting the device,
751 * to mask unwanted interrupts from the interface during the reset.
752 * However, due to the design of PC hardware, this will cause an
753 * immediate interrupt due to the edge transition it produces.
754 * This single interrupt gives us a "fast poll" for drives that
755 * recover from reset very quickly, saving us the first 50ms wait time.
756 */
757 OUT_BYTE(drive->ctl|6,IDE_CONTROL_REG); /* set SRST and nIEN */
758 udelay(10); /* more than enough time */
759 OUT_BYTE(drive->ctl|2,IDE_CONTROL_REG); /* clear SRST, leave nIEN */
760 udelay(10); /* more than enough time */
761 hwgroup->poll_timeout = jiffies + WAIT_WORSTCASE;
762 ide_set_handler (drive, &reset_pollfunc, HZ/20, NULL);
763
764 /*
765 * Some weird controller like resetting themselves to a strange
766 * state when the disks are reset this way. At least, the Winbond
767 * 553 documentation says that
768 */
769 if (hwif->resetproc != NULL)
770 hwif->resetproc(drive);
771
772 #endif /* OK_TO_RESET_CONTROLLER */
773
774 __restore_flags (flags); /* local CPU only */
775 return ide_started;
776 }
777
778 /*
779 * ide_do_reset() is the entry point to the drive/interface reset code.
780 */
781 ide_startstop_t ide_do_reset (ide_drive_t *drive)
782 {
783 return do_reset1 (drive, 0);
784 }
785
786 /*
787 * Clean up after success/failure of an explicit drive cmd
788 */
789 void ide_end_drive_cmd (ide_drive_t *drive, byte stat, byte err)
790 {
791 unsigned long flags;
792 struct request *rq = HWGROUP(drive)->rq;
793
794 if (rq->cmd == IDE_DRIVE_CMD) {
795 byte *args = (byte *) rq->buffer;
796 rq->errors = !OK_STAT(stat,READY_STAT,BAD_STAT);
797 if (args) {
798 args[0] = stat;
799 args[1] = err;
800 args[2] = IN_BYTE(IDE_NSECTOR_REG);
801 }
802 } else if (rq->cmd == IDE_DRIVE_TASK) {
803 byte *args = (byte *) rq->buffer;
804 rq->errors = !OK_STAT(stat,READY_STAT,BAD_STAT);
805 if (args) {
806 args[0] = stat;
807 args[1] = err;
808 args[2] = IN_BYTE(IDE_NSECTOR_REG);
809 args[3] = IN_BYTE(IDE_SECTOR_REG);
810 args[4] = IN_BYTE(IDE_LCYL_REG);
811 args[5] = IN_BYTE(IDE_HCYL_REG);
812 args[6] = IN_BYTE(IDE_SELECT_REG);
813 }
814 }
815 spin_lock_irqsave(&io_request_lock, flags);
816 blkdev_dequeue_request(rq);
817 HWGROUP(drive)->rq = NULL;
818 blkdev_release_request(rq);
819 spin_unlock_irqrestore(&io_request_lock, flags);
820 if (rq->sem != NULL)
821 up(rq->sem); /* inform originator that rq has been serviced */
822 }
823
824 /*
825 * Error reporting, in human readable form (luxurious, but a memory hog).
826 */
827 byte ide_dump_status (ide_drive_t *drive, const char *msg, byte stat)
828 {
829 unsigned long flags;
830 byte err = 0;
831
832 __save_flags (flags); /* local CPU only */
833 ide__sti(); /* local CPU only */
834 printk("%s: %s: status=0x%02x", drive->name, msg, stat);
835 #if FANCY_STATUS_DUMPS
836 printk(" { ");
837 if (stat & BUSY_STAT)
838 printk("Busy ");
839 else {
840 if (stat & READY_STAT) printk("DriveReady ");
841 if (stat & WRERR_STAT) printk("DeviceFault ");
842 if (stat & SEEK_STAT) printk("SeekComplete ");
843 if (stat & DRQ_STAT) printk("DataRequest ");
844 if (stat & ECC_STAT) printk("CorrectedError ");
845 if (stat & INDEX_STAT) printk("Index ");
846 if (stat & ERR_STAT) printk("Error ");
847 }
848 printk("}");
849 #endif /* FANCY_STATUS_DUMPS */
850 printk("\n");
851 if ((stat & (BUSY_STAT|ERR_STAT)) == ERR_STAT) {
852 err = GET_ERR();
853 printk("%s: %s: error=0x%02x", drive->name, msg, err);
854 #if FANCY_STATUS_DUMPS
855 if (drive->media == ide_disk) {
856 printk(" { ");
857 if (err & ABRT_ERR) printk("DriveStatusError ");
858 if (err & ICRC_ERR) printk("%s", (err & ABRT_ERR) ? "BadCRC " : "BadSector ");
859 if (err & ECC_ERR) printk("UncorrectableError ");
860 if (err & ID_ERR) printk("SectorIdNotFound ");
861 if (err & TRK0_ERR) printk("TrackZeroNotFound ");
862 if (err & MARK_ERR) printk("AddrMarkNotFound ");
863 printk("}");
864 if ((err & (BBD_ERR | ABRT_ERR)) == BBD_ERR || (err & (ECC_ERR|ID_ERR|MARK_ERR))) {
865 byte cur = IN_BYTE(IDE_SELECT_REG);
866 if (cur & 0x40) { /* using LBA? */
867 printk(", LBAsect=%ld", (unsigned long)
868 ((cur&0xf)<<24)
869 |(IN_BYTE(IDE_HCYL_REG)<<16)
870 |(IN_BYTE(IDE_LCYL_REG)<<8)
871 | IN_BYTE(IDE_SECTOR_REG));
872 } else {
873 printk(", CHS=%d/%d/%d",
874 (IN_BYTE(IDE_HCYL_REG)<<8) +
875 IN_BYTE(IDE_LCYL_REG),
876 cur & 0xf,
877 IN_BYTE(IDE_SECTOR_REG));
878 }
879 if (HWGROUP(drive)->rq)
880 printk(", sector=%ld", HWGROUP(drive)->rq->sector);
881 }
882 }
883 #endif /* FANCY_STATUS_DUMPS */
884 printk("\n");
885 }
886 __restore_flags (flags); /* local CPU only */
887 return err;
888 }
889
890 /*
891 * try_to_flush_leftover_data() is invoked in response to a drive
892 * unexpectedly having its DRQ_STAT bit set. As an alternative to
893 * resetting the drive, this routine tries to clear the condition
894 * by read a sector's worth of data from the drive. Of course,
895 * this may not help if the drive is *waiting* for data from *us*.
896 */
897 static void try_to_flush_leftover_data (ide_drive_t *drive)
898 {
899 int i = (drive->mult_count ? drive->mult_count : 1) * SECTOR_WORDS;
900
901 if (drive->media != ide_disk)
902 return;
903 while (i > 0) {
904 u32 buffer[16];
905 unsigned int wcount = (i > 16) ? 16 : i;
906 i -= wcount;
907 ide_input_data (drive, buffer, wcount);
908 }
909 }
910
911 /*
912 * ide_error() takes action based on the error returned by the drive.
913 */
914 ide_startstop_t ide_error (ide_drive_t *drive, const char *msg, byte stat)
915 {
916 struct request *rq;
917 byte err;
918
919 err = ide_dump_status(drive, msg, stat);
920 if (drive == NULL || (rq = HWGROUP(drive)->rq) == NULL)
921 return ide_stopped;
922 /* retry only "normal" I/O: */
923 if (rq->cmd == IDE_DRIVE_CMD || rq->cmd == IDE_DRIVE_TASK) {
924 rq->errors = 1;
925 ide_end_drive_cmd(drive, stat, err);
926 return ide_stopped;
927 }
928 if (stat & BUSY_STAT || ((stat & WRERR_STAT) && !drive->nowerr)) { /* other bits are useless when BUSY */
929 rq->errors |= ERROR_RESET;
930 } else {
931 if (drive->media == ide_disk && (stat & ERR_STAT)) {
932 /* err has different meaning on cdrom and tape */
933 if (err == ABRT_ERR) {
934 if (drive->select.b.lba && IN_BYTE(IDE_COMMAND_REG) == WIN_SPECIFY)
935 return ide_stopped; /* some newer drives don't support WIN_SPECIFY */
936 } else if ((err & (ABRT_ERR | ICRC_ERR)) == (ABRT_ERR | ICRC_ERR)) {
937 drive->crc_count++; /* UDMA crc error -- just retry the operation */
938 } else if (err & (BBD_ERR | ECC_ERR)) /* retries won't help these */
939 rq->errors = ERROR_MAX;
940 else if (err & TRK0_ERR) /* help it find track zero */
941 rq->errors |= ERROR_RECAL;
942 }
943 if ((stat & DRQ_STAT) && rq->cmd != WRITE)
944 try_to_flush_leftover_data(drive);
945 }
946 if (GET_STAT() & (BUSY_STAT|DRQ_STAT))
947 OUT_BYTE(WIN_IDLEIMMEDIATE,IDE_COMMAND_REG); /* force an abort */
948
949 if (rq->errors >= ERROR_MAX) {
950 if (drive->driver != NULL)
951 DRIVER(drive)->end_request(0, HWGROUP(drive));
952 else
953 ide_end_request(0, HWGROUP(drive));
954 } else {
955 if ((rq->errors & ERROR_RESET) == ERROR_RESET) {
956 ++rq->errors;
957 return ide_do_reset(drive);
958 }
959 if ((rq->errors & ERROR_RECAL) == ERROR_RECAL)
960 drive->special.b.recalibrate = 1;
961 ++rq->errors;
962 }
963 return ide_stopped;
964 }
965
966 /*
967 * Issue a simple drive command
968 * The drive must be selected beforehand.
969 */
970 void ide_cmd (ide_drive_t *drive, byte cmd, byte nsect, ide_handler_t *handler)
971 {
972 ide_set_handler (drive, handler, WAIT_CMD, NULL);
973 if (IDE_CONTROL_REG)
974 OUT_BYTE(drive->ctl,IDE_CONTROL_REG); /* clear nIEN */
975 SELECT_MASK(HWIF(drive),drive,0);
976 OUT_BYTE(nsect,IDE_NSECTOR_REG);
977 OUT_BYTE(cmd,IDE_COMMAND_REG);
978 }
979
980 /*
981 * drive_cmd_intr() is invoked on completion of a special DRIVE_CMD.
982 */
983 static ide_startstop_t drive_cmd_intr (ide_drive_t *drive)
984 {
985 struct request *rq = HWGROUP(drive)->rq;
986 byte *args = (byte *) rq->buffer;
987 byte stat = GET_STAT();
988 int retries = 10;
989
990 ide__sti(); /* local CPU only */
991 if ((stat & DRQ_STAT) && args && args[3]) {
992 byte io_32bit = drive->io_32bit;
993 drive->io_32bit = 0;
994 ide_input_data(drive, &args[4], args[3] * SECTOR_WORDS);
995 drive->io_32bit = io_32bit;
996 while (((stat = GET_STAT()) & BUSY_STAT) && retries--)
997 udelay(100);
998 }
999
1000 if (!OK_STAT(stat, READY_STAT, BAD_STAT))
1001 return ide_error(drive, "drive_cmd", stat); /* calls ide_end_drive_cmd */
1002 ide_end_drive_cmd (drive, stat, GET_ERR());
1003 return ide_stopped;
1004 }
1005
1006 /*
1007 * do_special() is used to issue WIN_SPECIFY, WIN_RESTORE, and WIN_SETMULT
1008 * commands to a drive. It used to do much more, but has been scaled back.
1009 */
1010 static ide_startstop_t do_special (ide_drive_t *drive)
1011 {
1012 special_t *s = &drive->special;
1013
1014 #ifdef DEBUG
1015 printk("%s: do_special: 0x%02x\n", drive->name, s->all);
1016 #endif
1017 if (s->b.set_tune) {
1018 ide_tuneproc_t *tuneproc = HWIF(drive)->tuneproc;
1019 s->b.set_tune = 0;
1020 if (tuneproc != NULL)
1021 tuneproc(drive, drive->tune_req);
1022 } else if (drive->driver != NULL) {
1023 return DRIVER(drive)->special(drive);
1024 } else if (s->all) {
1025 printk("%s: bad special flag: 0x%02x\n", drive->name, s->all);
1026 s->all = 0;
1027 }
1028 return ide_stopped;
1029 }
1030
1031 /*
1032 * This routine busy-waits for the drive status to be not "busy".
1033 * It then checks the status for all of the "good" bits and none
1034 * of the "bad" bits, and if all is okay it returns 0. All other
1035 * cases return 1 after invoking ide_error() -- caller should just return.
1036 *
1037 * This routine should get fixed to not hog the cpu during extra long waits..
1038 * That could be done by busy-waiting for the first jiffy or two, and then
1039 * setting a timer to wake up at half second intervals thereafter,
1040 * until timeout is achieved, before timing out.
1041 */
1042 int ide_wait_stat (ide_startstop_t *startstop, ide_drive_t *drive, byte good, byte bad, unsigned long timeout) {
1043 byte stat;
1044 int i;
1045 unsigned long flags;
1046
1047 udelay(1); /* spec allows drive 400ns to assert "BUSY" */
1048 if ((stat = GET_STAT()) & BUSY_STAT) {
1049 __save_flags(flags); /* local CPU only */
1050 ide__sti(); /* local CPU only */
1051 timeout += jiffies;
1052 while ((stat = GET_STAT()) & BUSY_STAT) {
1053 if (0 < (signed long)(jiffies - timeout)) {
1054 __restore_flags(flags); /* local CPU only */
1055 *startstop = ide_error(drive, "status timeout", stat);
1056 return 1;
1057 }
1058 }
1059 __restore_flags(flags); /* local CPU only */
1060 }
1061 /*
1062 * Allow status to settle, then read it again.
1063 * A few rare drives vastly violate the 400ns spec here,
1064 * so we'll wait up to 10usec for a "good" status
1065 * rather than expensively fail things immediately.
1066 * This fix courtesy of Matthew Faupel & Niccolo Rigacci.
1067 */
1068 for (i = 0; i < 10; i++) {
1069 udelay(1);
1070 if (OK_STAT((stat = GET_STAT()), good, bad))
1071 return 0;
1072 }
1073 *startstop = ide_error(drive, "status error", stat);
1074 return 1;
1075 }
1076
1077 /*
1078 * execute_drive_cmd() issues a special drive command,
1079 * usually initiated by ioctl() from the external hdparm program.
1080 */
1081 static ide_startstop_t execute_drive_cmd (ide_drive_t *drive, struct request *rq)
1082 {
1083 byte *args = rq->buffer;
1084 if (args && rq->cmd == IDE_DRIVE_TASK) {
1085 byte sel;
1086 #ifdef DEBUG
1087 printk("%s: DRIVE_TASK_CMD data=x%02x cmd=0x%02x fr=0x%02x ns=0x%02x sc=0x%02x lcyl=0x%02x hcyl=0x%02x sel=0x%02x\n",
1088 drive->name, args[0], args[1], args[2], args[3], args[4], args[5], args[6]);
1089 #endif
1090 OUT_BYTE(args[1], IDE_FEATURE_REG);
1091 OUT_BYTE(args[3], IDE_SECTOR_REG);
1092 OUT_BYTE(args[4], IDE_LCYL_REG);
1093 OUT_BYTE(args[5], IDE_HCYL_REG);
1094 sel = (args[6] & ~0x10);
1095 if (drive->select.b.unit)
1096 sel |= 0x10;
1097 OUT_BYTE(sel, IDE_SELECT_REG);
1098 ide_cmd(drive, args[0], args[2], &drive_cmd_intr);
1099 return ide_started;
1100 } else if (args) {
1101 #ifdef DEBUG
1102 printk("%s: DRIVE_CMD cmd=0x%02x sc=0x%02x fr=0x%02x xx=0x%02x\n",
1103 drive->name, args[0], args[1], args[2], args[3]);
1104 #endif
1105 if (args[0] == WIN_SMART) {
1106 OUT_BYTE(0x4f, IDE_LCYL_REG);
1107 OUT_BYTE(0xc2, IDE_HCYL_REG);
1108 OUT_BYTE(args[2],IDE_FEATURE_REG);
1109 OUT_BYTE(args[1],IDE_SECTOR_REG);
1110 ide_cmd(drive, args[0], args[3], &drive_cmd_intr);
1111 return ide_started;
1112 }
1113 OUT_BYTE(args[2],IDE_FEATURE_REG);
1114 ide_cmd(drive, args[0], args[1], &drive_cmd_intr);
1115 return ide_started;
1116 } else {
1117 /*
1118 * NULL is actually a valid way of waiting for
1119 * all current requests to be flushed from the queue.
1120 */
1121 #ifdef DEBUG
1122 printk("%s: DRIVE_CMD (null)\n", drive->name);
1123 #endif
1124 ide_end_drive_cmd(drive, GET_STAT(), GET_ERR());
1125 return ide_stopped;
1126 }
1127 }
1128
1129 /*
1130 * start_request() initiates handling of a new I/O request
1131 */
1132 static ide_startstop_t start_request (ide_drive_t *drive)
1133 {
1134 ide_startstop_t startstop;
1135 unsigned long block, blockend;
1136 struct request *rq = blkdev_entry_next_request(&drive->queue.queue_head);
1137 unsigned int minor = MINOR(rq->rq_dev), unit = minor >> PARTN_BITS;
1138 ide_hwif_t *hwif = HWIF(drive);
1139
1140 #ifdef DEBUG
1141 printk("%s: start_request: current=0x%08lx\n", hwif->name, (unsigned long) rq);
1142 #endif
1143 if (unit >= MAX_DRIVES) {
1144 printk("%s: bad device number: %s\n", hwif->name, kdevname(rq->rq_dev));
1145 goto kill_rq;
1146 }
1147 #ifdef DEBUG
1148 if (rq->bh && !buffer_locked(rq->bh)) {
1149 printk("%s: block not locked\n", drive->name);
1150 goto kill_rq;
1151 }
1152 #endif
1153 block = rq->sector;
1154 blockend = block + rq->nr_sectors;
1155
1156 if ((rq->cmd == READ || rq->cmd == WRITE) &&
1157 (drive->media == ide_disk || drive->media == ide_floppy)) {
1158 if ((blockend < block) || (blockend > drive->part[minor&PARTN_MASK].nr_sects)) {
1159 printk("%s%c: bad access: block=%ld, count=%ld\n", drive->name,
1160 (minor&PARTN_MASK)?''+(minor&PARTN_MASK):' ', block, rq->nr_sectors);
1161 goto kill_rq;
1162 }
1163 block += drive->part[minor&PARTN_MASK].start_sect + drive->sect0;
1164 }
1165 /* Yecch - this will shift the entire interval,
1166 possibly killing some innocent following sector */
1167 if (block == 0 && drive->remap_0_to_1 == 1)
1168 block = 1; /* redirect MBR access to EZ-Drive partn table */
1169
1170 #if (DISK_RECOVERY_TIME > 0)
1171 while ((read_timer() - hwif->last_time) < DISK_RECOVERY_TIME);
1172 #endif
1173
1174 SELECT_DRIVE(hwif, drive);
1175 if (ide_wait_stat(&startstop, drive, drive->ready_stat, BUSY_STAT|DRQ_STAT, WAIT_READY)) {
1176 printk("%s: drive not ready for command\n", drive->name);
1177 return startstop;
1178 }
1179 if (!drive->special.all) {
1180 if (rq->cmd == IDE_DRIVE_CMD || rq->cmd == IDE_DRIVE_TASK) {
1181 return execute_drive_cmd(drive, rq);
1182 }
1183 if (drive->driver != NULL) {
1184 return (DRIVER(drive)->do_request(drive, rq, block));
1185 }
1186 printk("%s: media type %d not supported\n", drive->name, drive->media);
1187 goto kill_rq;
1188 }
1189 return do_special(drive);
1190 kill_rq:
1191 if (drive->driver != NULL)
1192 DRIVER(drive)->end_request(0, HWGROUP(drive));
1193 else
1194 ide_end_request(0, HWGROUP(drive));
1195 return ide_stopped;
1196 }
1197
1198 /*
1199 * ide_stall_queue() can be used by a drive to give excess bandwidth back
1200 * to the hwgroup by sleeping for timeout jiffies.
1201 */
1202 void ide_stall_queue (ide_drive_t *drive, unsigned long timeout)
1203 {
1204 if (timeout > WAIT_WORSTCASE)
1205 timeout = WAIT_WORSTCASE;
1206 drive->sleep = timeout + jiffies;
1207 }
1208
1209 #define WAKEUP(drive) ((drive)->service_start + 2 * (drive)->service_time)
1210
1211 /*
1212 * choose_drive() selects the next drive which will be serviced.
1213 */
1214 static inline ide_drive_t *choose_drive (ide_hwgroup_t *hwgroup)
1215 {
1216 ide_drive_t *drive, *best;
1217
1218 repeat:
1219 best = NULL;
1220 drive = hwgroup->drive;
1221 do {
1222 if (!list_empty(&drive->queue.queue_head) && (!drive->sleep || 0 <= (signed long)(jiffies - drive->sleep))) {
1223 if (!best
1224 || (drive->sleep && (!best->sleep || 0 < (signed long)(best->sleep - drive->sleep)))
1225 || (!best->sleep && 0 < (signed long)(WAKEUP(best) - WAKEUP(drive))))
1226 {
1227 if( !drive->queue.plugged )
1228 best = drive;
1229 }
1230 }
1231 } while ((drive = drive->next) != hwgroup->drive);
1232 if (best && best->nice1 && !best->sleep && best != hwgroup->drive && best->service_time > WAIT_MIN_SLEEP) {
1233 long t = (signed long)(WAKEUP(best) - jiffies);
1234 if (t >= WAIT_MIN_SLEEP) {
1235 /*
1236 * We *may* have some time to spare, but first let's see if
1237 * someone can potentially benefit from our nice mood today..
1238 */
1239 drive = best->next;
1240 do {
1241 if (!drive->sleep
1242 && 0 < (signed long)(WAKEUP(drive) - (jiffies - best->service_time))
1243 && 0 < (signed long)((jiffies + t) - WAKEUP(drive)))
1244 {
1245 ide_stall_queue(best, IDE_MIN(t, 10 * WAIT_MIN_SLEEP));
1246 goto repeat;
1247 }
1248 } while ((drive = drive->next) != best);
1249 }
1250 }
1251 return best;
1252 }
1253
1254 /*
1255 * Issue a new request to a drive from hwgroup
1256 * Caller must have already done spin_lock_irqsave(&io_request_lock, ..);
1257 *
1258 * A hwgroup is a serialized group of IDE interfaces. Usually there is
1259 * exactly one hwif (interface) per hwgroup, but buggy controllers (eg. CMD640)
1260 * may have both interfaces in a single hwgroup to "serialize" access.
1261 * Or possibly multiple ISA interfaces can share a common IRQ by being grouped
1262 * together into one hwgroup for serialized access.
1263 *
1264 * Note also that several hwgroups can end up sharing a single IRQ,
1265 * possibly along with many other devices. This is especially common in
1266 * PCI-based systems with off-board IDE controller cards.
1267 *
1268 * The IDE driver uses the single global io_request_lock spinlock to protect
1269 * access to the request queues, and to protect the hwgroup->busy flag.
1270 *
1271 * The first thread into the driver for a particular hwgroup sets the
1272 * hwgroup->busy flag to indicate that this hwgroup is now active,
1273 * and then initiates processing of the top request from the request queue.
1274 *
1275 * Other threads attempting entry notice the busy setting, and will simply
1276 * queue their new requests and exit immediately. Note that hwgroup->busy
1277 * remains set even when the driver is merely awaiting the next interrupt.
1278 * Thus, the meaning is "this hwgroup is busy processing a request".
1279 *
1280 * When processing of a request completes, the completing thread or IRQ-handler
1281 * will start the next request from the queue. If no more work remains,
1282 * the driver will clear the hwgroup->busy flag and exit.
1283 *
1284 * The io_request_lock (spinlock) is used to protect all access to the
1285 * hwgroup->busy flag, but is otherwise not needed for most processing in
1286 * the driver. This makes the driver much more friendlier to shared IRQs
1287 * than previous designs, while remaining 100% (?) SMP safe and capable.
1288 */
1289 static void ide_do_request(ide_hwgroup_t *hwgroup, int masked_irq)
1290 {
1291 ide_drive_t *drive;
1292 ide_hwif_t *hwif;
1293 ide_startstop_t startstop;
1294
1295 ide_get_lock(&ide_lock, ide_intr, hwgroup); /* for atari only: POSSIBLY BROKEN HERE(?) */
1296
1297 __cli(); /* necessary paranoia: ensure IRQs are masked on local CPU */
1298
1299 while (!hwgroup->busy) {
1300 hwgroup->busy = 1;
1301 drive = choose_drive(hwgroup);
1302 if (drive == NULL) {
1303 unsigned long sleep = 0;
1304 hwgroup->rq = NULL;
1305 drive = hwgroup->drive;
1306 do {
1307 if (drive->sleep && (!sleep || 0 < (signed long)(sleep - drive->sleep)))
1308 sleep = drive->sleep;
1309 } while ((drive = drive->next) != hwgroup->drive);
1310 if (sleep) {
1311 /*
1312 * Take a short snooze, and then wake up this hwgroup again.
1313 * This gives other hwgroups on the same a chance to
1314 * play fairly with us, just in case there are big differences
1315 * in relative throughputs.. don't want to hog the cpu too much.
1316 */
1317 if (0 < (signed long)(jiffies + WAIT_MIN_SLEEP - sleep))
1318 sleep = jiffies + WAIT_MIN_SLEEP;
1319 #if 1
1320 if (timer_pending(&hwgroup->timer))
1321 printk("ide_set_handler: timer already active\n");
1322 #endif
1323 hwgroup->sleeping = 1; /* so that ide_timer_expiry knows what to do */
1324 mod_timer(&hwgroup->timer, sleep);
1325 /* we purposely leave hwgroup->busy==1 while sleeping */
1326 } else {
1327 /* Ugly, but how can we sleep for the lock otherwise? perhaps from tq_disk? */
1328 ide_release_lock(&ide_lock); /* for atari only */
1329 hwgroup->busy = 0;
1330 }
1331 return; /* no more work for this hwgroup (for now) */
1332 }
1333 hwif = HWIF(drive);
1334 if (hwgroup->hwif->sharing_irq && hwif != hwgroup->hwif && hwif->io_ports[IDE_CONTROL_OFFSET]) {
1335 /* set nIEN for previous hwif */
1336 SELECT_INTERRUPT(hwif, drive);
1337 }
1338 hwgroup->hwif = hwif;
1339 hwgroup->drive = drive;
1340 drive->sleep = 0;
1341 drive->service_start = jiffies;
1342
1343 if ( drive->queue.plugged ) /* paranoia */
1344 printk("%s: Huh? nuking plugged queue\n", drive->name);
1345 hwgroup->rq = blkdev_entry_next_request(&drive->queue.queue_head);
1346 /*
1347 * Some systems have trouble with IDE IRQs arriving while
1348 * the driver is still setting things up. So, here we disable
1349 * the IRQ used by this interface while the request is being started.
1350 * This may look bad at first, but pretty much the same thing
1351 * happens anyway when any interrupt comes in, IDE or otherwise
1352 * -- the kernel masks the IRQ while it is being handled.
1353 */
1354 if (masked_irq && hwif->irq != masked_irq)
1355 disable_irq_nosync(hwif->irq);
1356 spin_unlock(&io_request_lock);
1357 ide__sti(); /* allow other IRQs while we start this request */
1358 startstop = start_request(drive);
1359 spin_lock_irq(&io_request_lock);
1360 if (masked_irq && hwif->irq != masked_irq)
1361 enable_irq(hwif->irq);
1362 if (startstop == ide_stopped)
1363 hwgroup->busy = 0;
1364 }
1365 }
1366
1367 /*
1368 * ide_get_queue() returns the queue which corresponds to a given device.
1369 */
1370 request_queue_t *ide_get_queue (kdev_t dev)
1371 {
1372 ide_hwif_t *hwif = (ide_hwif_t *)blk_dev[MAJOR(dev)].data;
1373
1374 return &hwif->drives[DEVICE_NR(dev) & 1].queue;
1375 }
1376
1377 /*
1378 * Passes the stuff to ide_do_request
1379 */
1380 void do_ide_request(request_queue_t *q)
1381 {
1382 ide_do_request(q->queuedata, 0);
1383 }
1384
1385 /*
1386 * ide_timer_expiry() is our timeout function for all drive operations.
1387 * But note that it can also be invoked as a result of a "sleep" operation
1388 * triggered by the mod_timer() call in ide_do_request.
1389 */
1390 void ide_timer_expiry (unsigned long data)
1391 {
1392 ide_hwgroup_t *hwgroup = (ide_hwgroup_t *) data;
1393 ide_handler_t *handler;
1394 ide_expiry_t *expiry;
1395 unsigned long flags;
1396 unsigned long wait;
1397
1398 spin_lock_irqsave(&io_request_lock, flags);
1399 del_timer(&hwgroup->timer);
1400
1401 if ((handler = hwgroup->handler) == NULL) {
1402 /*
1403 * Either a marginal timeout occured
1404 * (got the interrupt just as timer expired),
1405 * or we were "sleeping" to give other devices a chance.
1406 * Either way, we don't really want to complain about anything.
1407 */
1408 if (hwgroup->sleeping) {
1409 hwgroup->sleeping = 0;
1410 hwgroup->busy = 0;
1411 }
1412 } else {
1413 ide_drive_t *drive = hwgroup->drive;
1414 if (!drive) {
1415 printk("ide_timer_expiry: hwgroup->drive was NULL\n");
1416 hwgroup->handler = NULL;
1417 } else {
1418 ide_hwif_t *hwif;
1419 ide_startstop_t startstop;
1420 if (!hwgroup->busy) {
1421 hwgroup->busy = 1; /* paranoia */
1422 printk("%s: ide_timer_expiry: hwgroup->busy was 0 ??\n", drive->name);
1423 }
1424 if ((expiry = hwgroup->expiry) != NULL) {
1425 /* continue */
1426 if ((wait = expiry(drive)) != 0) {
1427 /* reset timer */
1428 hwgroup->timer.expires = jiffies + wait;
1429 add_timer(&hwgroup->timer);
1430 spin_unlock_irqrestore(&io_request_lock, flags);
1431 return;
1432 }
1433 }
1434 hwgroup->handler = NULL;
1435 /*
1436 * We need to simulate a real interrupt when invoking
1437 * the handler() function, which means we need to globally
1438 * mask the specific IRQ:
1439 */
1440 spin_unlock(&io_request_lock);
1441 hwif = HWIF(drive);
1442 #if DISABLE_IRQ_NOSYNC
1443 disable_irq_nosync(hwif->irq);
1444 #else
1445 disable_irq(hwif->irq); /* disable_irq_nosync ?? */
1446 #endif /* DISABLE_IRQ_NOSYNC */
1447 __cli(); /* local CPU only, as if we were handling an interrupt */
1448 if (hwgroup->poll_timeout != 0) {
1449 startstop = handler(drive);
1450 } else if (drive_is_ready(drive)) {
1451 if (drive->waiting_for_dma)
1452 (void) hwgroup->hwif->dmaproc(ide_dma_lostirq, drive);
1453 (void)ide_ack_intr(hwif);
1454 printk("%s: lost interrupt\n", drive->name);
1455 startstop = handler(drive);
1456 } else {
1457 if (drive->waiting_for_dma) {
1458 (void) hwgroup->hwif->dmaproc(ide_dma_end, drive);
1459 printk("%s: timeout waiting for DMA\n", drive->name);
1460 (void) hwgroup->hwif->dmaproc(ide_dma_timeout, drive);
1461 }
1462 startstop = ide_error(drive, "irq timeout", GET_STAT());
1463 }
1464 set_recovery_timer(hwif);
1465 drive->service_time = jiffies - drive->service_start;
1466 enable_irq(hwif->irq);
1467 spin_lock_irq(&io_request_lock);
1468 if (startstop == ide_stopped)
1469 hwgroup->busy = 0;
1470 }
1471 }
1472 ide_do_request(hwgroup, 0);
1473 spin_unlock_irqrestore(&io_request_lock, flags);
1474 }
1475
1476 /*
1477 * There's nothing really useful we can do with an unexpected interrupt,
1478 * other than reading the status register (to clear it), and logging it.
1479 * There should be no way that an irq can happen before we're ready for it,
1480 * so we needn't worry much about losing an "important" interrupt here.
1481 *
1482 * On laptops (and "green" PCs), an unexpected interrupt occurs whenever the
1483 * drive enters "idle", "standby", or "sleep" mode, so if the status looks
1484 * "good", we just ignore the interrupt completely.
1485 *
1486 * This routine assumes __cli() is in effect when called.
1487 *
1488 * If an unexpected interrupt happens on irq15 while we are handling irq14
1489 * and if the two interfaces are "serialized" (CMD640), then it looks like
1490 * we could screw up by interfering with a new request being set up for irq15.
1491 *
1492 * In reality, this is a non-issue. The new command is not sent unless the
1493 * drive is ready to accept one, in which case we know the drive is not
1494 * trying to interrupt us. And ide_set_handler() is always invoked before
1495 * completing the issuance of any new drive command, so we will not be
1496 * accidently invoked as a result of any valid command completion interrupt.
1497 *
1498 */
1499 static void unexpected_intr (int irq, ide_hwgroup_t *hwgroup)
1500 {
1501 byte stat;
1502 ide_hwif_t *hwif = hwgroup->hwif;
1503
1504 /*
1505 * handle the unexpected interrupt
1506 */
1507 do {
1508 if (hwif->irq == irq) {
1509 stat = IN_BYTE(hwif->io_ports[IDE_STATUS_OFFSET]);
1510 if (!OK_STAT(stat, READY_STAT, BAD_STAT)) {
1511 /* Try to not flood the console with msgs */
1512 static unsigned long last_msgtime, count;
1513 ++count;
1514 if (0 < (signed long)(jiffies - (last_msgtime + HZ))) {
1515 last_msgtime = jiffies;
1516 printk("%s%s: unexpected interrupt, status=0x%02x, count=%ld\n",
1517 hwif->name, (hwif->next == hwgroup->hwif) ? "" : "(?)", stat, count);
1518 }
1519 }
1520 }
1521 } while ((hwif = hwif->next) != hwgroup->hwif);
1522 }
1523
1524 /*
1525 * entry point for all interrupts, caller does __cli() for us
1526 */
1527 void ide_intr (int irq, void *dev_id, struct pt_regs *regs)
1528 {
1529 unsigned long flags;
1530 ide_hwgroup_t *hwgroup = (ide_hwgroup_t *)dev_id;
1531 ide_hwif_t *hwif;
1532 ide_drive_t *drive;
1533 ide_handler_t *handler;
1534 ide_startstop_t startstop;
1535
1536 spin_lock_irqsave(&io_request_lock, flags);
1537 hwif = hwgroup->hwif;
1538
1539 if (!ide_ack_intr(hwif)) {
1540 spin_unlock_irqrestore(&io_request_lock, flags);
1541 return;
1542 }
1543
1544 if ((handler = hwgroup->handler) == NULL || hwgroup->poll_timeout != 0) {
1545 /*
1546 * Not expecting an interrupt from this drive.
1547 * That means this could be:
1548 * (1) an interrupt from another PCI device
1549 * sharing the same PCI INT# as us.
1550 * or (2) a drive just entered sleep or standby mode,
1551 * and is interrupting to let us know.
1552 * or (3) a spurious interrupt of unknown origin.
1553 *
1554 * For PCI, we cannot tell the difference,
1555 * so in that case we just ignore it and hope it goes away.
1556 */
1557 #ifdef CONFIG_BLK_DEV_IDEPCI
1558 if (IDE_PCI_DEVID_EQ(hwif->pci_devid, IDE_PCI_DEVID_NULL))
1559 #endif /* CONFIG_BLK_DEV_IDEPCI */
1560 {
1561 /*
1562 * Probably not a shared PCI interrupt,
1563 * so we can safely try to do something about it:
1564 */
1565 unexpected_intr(irq, hwgroup);
1566 #ifdef CONFIG_BLK_DEV_IDEPCI
1567 } else {
1568 /*
1569 * Whack the status register, just in case we have a leftover pending IRQ.
1570 */
1571 (void) IN_BYTE(hwif->io_ports[IDE_STATUS_OFFSET]);
1572 #endif /* CONFIG_BLK_DEV_IDEPCI */
1573 }
1574 spin_unlock_irqrestore(&io_request_lock, flags);
1575 return;
1576 }
1577 drive = hwgroup->drive;
1578 if (!drive) {
1579 /*
1580 * This should NEVER happen, and there isn't much we could do about it here.
1581 */
1582 spin_unlock_irqrestore(&io_request_lock, flags);
1583 return;
1584 }
1585 if (!drive_is_ready(drive)) {
1586 /*
1587 * This happens regularly when we share a PCI IRQ with another device.
1588 * Unfortunately, it can also happen with some buggy drives that trigger
1589 * the IRQ before their status register is up to date. Hopefully we have
1590 * enough advance overhead that the latter isn't a problem.
1591 */
1592 spin_unlock_irqrestore(&io_request_lock, flags);
1593 return;
1594 }
1595 if (!hwgroup->busy) {
1596 hwgroup->busy = 1; /* paranoia */
1597 printk("%s: ide_intr: hwgroup->busy was 0 ??\n", drive->name);
1598 }
1599 hwgroup->handler = NULL;
1600 del_timer(&hwgroup->timer);
1601 spin_unlock(&io_request_lock);
1602
1603 if (drive->unmask)
1604 ide__sti(); /* local CPU only */
1605 startstop = handler(drive); /* service this interrupt, may set handler for next interrupt */
1606 spin_lock_irq(&io_request_lock);
1607
1608 /*
1609 * Note that handler() may have set things up for another
1610 * interrupt to occur soon, but it cannot happen until
1611 * we exit from this routine, because it will be the
1612 * same irq as is currently being serviced here, and Linux
1613 * won't allow another of the same (on any CPU) until we return.
1614 */
1615 set_recovery_timer(HWIF(drive));
1616 drive->service_time = jiffies - drive->service_start;
1617 if (startstop == ide_stopped) {
1618 if (hwgroup->handler == NULL) { /* paranoia */
1619 hwgroup->busy = 0;
1620 ide_do_request(hwgroup, hwif->irq);
1621 } else {
1622 printk("%s: ide_intr: huh? expected NULL handler on exit\n", drive->name);
1623 }
1624 }
1625 spin_unlock_irqrestore(&io_request_lock, flags);
1626 }
1627
1628 /*
1629 * get_info_ptr() returns the (ide_drive_t *) for a given device number.
1630 * It returns NULL if the given device number does not match any present drives.
1631 */
1632 ide_drive_t *get_info_ptr (kdev_t i_rdev)
1633 {
1634 int major = MAJOR(i_rdev);
1635 #if 0
1636 int minor = MINOR(i_rdev) & PARTN_MASK;
1637 #endif
1638 unsigned int h;
1639
1640 for (h = 0; h < MAX_HWIFS; ++h) {
1641 ide_hwif_t *hwif = &ide_hwifs[h];
1642 if (hwif->present && major == hwif->major) {
1643 unsigned unit = DEVICE_NR(i_rdev);
1644 if (unit < MAX_DRIVES) {
1645 ide_drive_t *drive = &hwif->drives[unit];
1646 #if 0
1647 if ((drive->present) && (drive->part[minor].nr_sects))
1648 #else
1649 if (drive->present)
1650 #endif
1651 return drive;
1652 }
1653 break;
1654 }
1655 }
1656 return NULL;
1657 }
1658
1659 /*
1660 * This function is intended to be used prior to invoking ide_do_drive_cmd().
1661 */
1662 void ide_init_drive_cmd (struct request *rq)
1663 {
1664 memset(rq, 0, sizeof(*rq));
1665 rq->cmd = IDE_DRIVE_CMD;
1666 }
1667
1668 /*
1669 * This function issues a special IDE device request
1670 * onto the request queue.
1671 *
1672 * If action is ide_wait, then the rq is queued at the end of the
1673 * request queue, and the function sleeps until it has been processed.
1674 * This is for use when invoked from an ioctl handler.
1675 *
1676 * If action is ide_preempt, then the rq is queued at the head of
1677 * the request queue, displacing the currently-being-processed
1678 * request and this function returns immediately without waiting
1679 * for the new rq to be completed. This is VERY DANGEROUS, and is
1680 * intended for careful use by the ATAPI tape/cdrom driver code.
1681 *
1682 * If action is ide_next, then the rq is queued immediately after
1683 * the currently-being-processed-request (if any), and the function
1684 * returns without waiting for the new rq to be completed. As above,
1685 * This is VERY DANGEROUS, and is intended for careful use by the
1686 * ATAPI tape/cdrom driver code.
1687 *
1688 * If action is ide_end, then the rq is queued at the end of the
1689 * request queue, and the function returns immediately without waiting
1690 * for the new rq to be completed. This is again intended for careful
1691 * use by the ATAPI tape/cdrom driver code.
1692 */
1693 int ide_do_drive_cmd (ide_drive_t *drive, struct request *rq, ide_action_t action)
1694 {
1695 unsigned long flags;
1696 ide_hwgroup_t *hwgroup = HWGROUP(drive);
1697 unsigned int major = HWIF(drive)->major;
1698 struct list_head * queue_head;
1699 DECLARE_MUTEX_LOCKED(sem);
1700
1701 #ifdef CONFIG_BLK_DEV_PDC4030
1702 if (HWIF(drive)->chipset == ide_pdc4030 && rq->buffer != NULL)
1703 return -ENOSYS; /* special drive cmds not supported */
1704 #endif
1705 rq->errors = 0;
1706 rq->rq_status = RQ_ACTIVE;
1707 rq->rq_dev = MKDEV(major,(drive->select.b.unit)<<PARTN_BITS);
1708 if (action == ide_wait)
1709 rq->sem = &sem;
1710 spin_lock_irqsave(&io_request_lock, flags);
1711 queue_head = &drive->queue.queue_head;
1712 if (list_empty(queue_head) || action == ide_preempt) {
1713 if (action == ide_preempt)
1714 hwgroup->rq = NULL;
1715 } else {
1716 if (action == ide_wait || action == ide_end) {
1717 queue_head = queue_head->prev;
1718 } else
1719 queue_head = queue_head->next;
1720 }
1721 list_add(&rq->queue, queue_head);
1722 ide_do_request(hwgroup, 0);
1723 spin_unlock_irqrestore(&io_request_lock, flags);
1724 if (action == ide_wait) {
1725 down(&sem); /* wait for it to be serviced */
1726 return rq->errors ? -EIO : 0; /* return -EIO if errors */
1727 }
1728 return 0;
1729
1730 }
1731
1732 /*
1733 * This routine is called to flush all partitions and partition tables
1734 * for a changed disk, and then re-read the new partition table.
1735 * If we are revalidating a disk because of a media change, then we
1736 * enter with usage == 0. If we are using an ioctl, we automatically have
1737 * usage == 1 (we need an open channel to use an ioctl :-), so this
1738 * is our limit.
1739 */
1740 int ide_revalidate_disk (kdev_t i_rdev)
1741 {
1742 ide_drive_t *drive;
1743 ide_hwgroup_t *hwgroup;
1744 unsigned int p, major, minor;
1745 long flags;
1746
1747 if ((drive = get_info_ptr(i_rdev)) == NULL)
1748 return -ENODEV;
1749 major = MAJOR(i_rdev);
1750 minor = drive->select.b.unit << PARTN_BITS;
1751 hwgroup = HWGROUP(drive);
1752 spin_lock_irqsave(&io_request_lock, flags);
1753 if (drive->busy || (drive->usage > 1)) {
1754 spin_unlock_irqrestore(&io_request_lock, flags);
1755 return -EBUSY;
1756 };
1757 drive->busy = 1;
1758 MOD_INC_USE_COUNT;
1759 spin_unlock_irqrestore(&io_request_lock, flags);
1760
1761 for (p = 0; p < (1<<PARTN_BITS); ++p) {
1762 if (drive->part[p].nr_sects > 0) {
1763 kdev_t devp = MKDEV(major, minor+p);
1764 struct super_block * sb = get_super(devp);
1765 fsync_dev (devp);
1766 if (sb)
1767 invalidate_inodes(sb);
1768 invalidate_buffers (devp);
1769 set_blocksize(devp, 1024);
1770 }
1771 drive->part[p].start_sect = 0;
1772 drive->part[p].nr_sects = 0;
1773 };
1774
1775 if (DRIVER(drive)->revalidate)
1776 DRIVER(drive)->revalidate(drive);
1777
1778 drive->busy = 0;
1779 wake_up(&drive->wqueue);
1780 MOD_DEC_USE_COUNT;
1781 return 0;
1782 }
1783
1784 static void revalidate_drives (void)
1785 {
1786 ide_hwif_t *hwif;
1787 ide_drive_t *drive;
1788 int index, unit;
1789
1790 for (index = 0; index < MAX_HWIFS; ++index) {
1791 hwif = &ide_hwifs[index];
1792 for (unit = 0; unit < MAX_DRIVES; ++unit) {
1793 drive = &ide_hwifs[index].drives[unit];
1794 if (drive->revalidate) {
1795 drive->revalidate = 0;
1796 if (!initializing)
1797 (void) ide_revalidate_disk(MKDEV(hwif->major, unit<<PARTN_BITS));
1798 }
1799 }
1800 }
1801 }
1802
1803 static void ide_probe_module (void)
1804 {
1805 if (!ide_probe) {
1806 #if defined(CONFIG_KMOD) && defined(CONFIG_BLK_DEV_IDE_MODULE)
1807 (void) request_module("ide-probe-mod");
1808 #endif /* (CONFIG_KMOD) && (CONFIG_BLK_DEV_IDE_MODULE) */
1809 } else {
1810 (void) ide_probe->init();
1811 }
1812 revalidate_drives();
1813 }
1814
1815 static void ide_driver_module (void)
1816 {
1817 int index;
1818 ide_module_t *module = ide_modules;
1819
1820 for (index = 0; index < MAX_HWIFS; ++index)
1821 if (ide_hwifs[index].present)
1822 goto search;
1823 ide_probe_module();
1824 search:
1825 while (module) {
1826 (void) module->init();
1827 module = module->next;
1828 }
1829 revalidate_drives();
1830 }
1831
1832 static int ide_open (struct inode * inode, struct file * filp)
1833 {
1834 ide_drive_t *drive;
1835 int rc;
1836
1837 if ((drive = get_info_ptr(inode->i_rdev)) == NULL)
1838 return -ENXIO;
1839 MOD_INC_USE_COUNT;
1840 if (drive->driver == NULL)
1841 ide_driver_module();
1842 #ifdef CONFIG_KMOD
1843 if (drive->driver == NULL) {
1844 if (drive->media == ide_disk)
1845 (void) request_module("ide-disk");
1846 if (drive->media == ide_cdrom)
1847 (void) request_module("ide-cd");
1848 if (drive->media == ide_tape)
1849 (void) request_module("ide-tape");
1850 if (drive->media == ide_floppy)
1851 (void) request_module("ide-floppy");
1852 }
1853 #endif /* CONFIG_KMOD */
1854 while (drive->busy)
1855 sleep_on(&drive->wqueue);
1856 drive->usage++;
1857 if (drive->driver != NULL) {
1858 if ((rc = DRIVER(drive)->open(inode, filp, drive)))
1859 MOD_DEC_USE_COUNT;
1860 return rc;
1861 }
1862 printk ("%s: driver not present\n", drive->name);
1863 drive->usage--;
1864 MOD_DEC_USE_COUNT;
1865 return -ENXIO;
1866 }
1867
1868 /*
1869 * Releasing a block device means we sync() it, so that it can safely
1870 * be forgotten about...
1871 */
1872 static int ide_release (struct inode * inode, struct file * file)
1873 {
1874 ide_drive_t *drive;
1875
1876 if ((drive = get_info_ptr(inode->i_rdev)) != NULL) {
1877 drive->usage--;
1878 if (drive->driver != NULL)
1879 DRIVER(drive)->release(inode, file, drive);
1880 MOD_DEC_USE_COUNT;
1881 }
1882 return 0;
1883 }
1884
1885 int ide_replace_subdriver (ide_drive_t *drive, const char *driver)
1886 {
1887 if (!drive->present || drive->busy || drive->usage)
1888 goto abort;
1889 if (drive->driver != NULL && DRIVER(drive)->cleanup(drive))
1890 goto abort;
1891 strncpy(drive->driver_req, driver, 9);
1892 ide_driver_module();
1893 drive->driver_req[0] = 0;
1894 ide_driver_module();
1895 if (DRIVER(drive) && !strcmp(DRIVER(drive)->name, driver))
1896 return 0;
1897 abort:
1898 return 1;
1899 }
1900
1901 #ifdef CONFIG_PROC_FS
1902 ide_proc_entry_t generic_subdriver_entries[] = {
1903 { "capacity", S_IFREG|S_IRUGO, proc_ide_read_capacity, NULL },
1904 { NULL, 0, NULL, NULL }
1905 };
1906 #endif
1907
1908 /*
1909 * Note that we only release the standard ports,
1910 * and do not even try to handle any extra ports
1911 * allocated for weird IDE interface chipsets.
1912 */
1913 void hwif_unregister (ide_hwif_t *hwif)
1914 {
1915 if (hwif->straight8) {
1916 ide_release_region(hwif->io_ports[IDE_DATA_OFFSET], 8);
1917 goto jump_eight;
1918 }
1919 if (hwif->io_ports[IDE_DATA_OFFSET])
1920 ide_release_region(hwif->io_ports[IDE_DATA_OFFSET], 1);
1921 if (hwif->io_ports[IDE_ERROR_OFFSET])
1922 ide_release_region(hwif->io_ports[IDE_ERROR_OFFSET], 1);
1923 if (hwif->io_ports[IDE_NSECTOR_OFFSET])
1924 ide_release_region(hwif->io_ports[IDE_NSECTOR_OFFSET], 1);
1925 if (hwif->io_ports[IDE_SECTOR_OFFSET])
1926 ide_release_region(hwif->io_ports[IDE_SECTOR_OFFSET], 1);
1927 if (hwif->io_ports[IDE_LCYL_OFFSET])
1928 ide_release_region(hwif->io_ports[IDE_LCYL_OFFSET], 1);
1929 if (hwif->io_ports[IDE_HCYL_OFFSET])
1930 ide_release_region(hwif->io_ports[IDE_HCYL_OFFSET], 1);
1931 if (hwif->io_ports[IDE_SELECT_OFFSET])
1932 ide_release_region(hwif->io_ports[IDE_SELECT_OFFSET], 1);
1933 if (hwif->io_ports[IDE_STATUS_OFFSET])
1934 ide_release_region(hwif->io_ports[IDE_STATUS_OFFSET], 1);
1935 jump_eight:
1936 if (hwif->io_ports[IDE_CONTROL_OFFSET])
1937 ide_release_region(hwif->io_ports[IDE_CONTROL_OFFSET], 1);
1938 #if defined(CONFIG_AMIGA) || defined(CONFIG_MAC)
1939 if (hwif->io_ports[IDE_IRQ_OFFSET])
1940 ide_release_region(hwif->io_ports[IDE_IRQ_OFFSET], 1);
1941 #endif /* (CONFIG_AMIGA) || (CONFIG_MAC) */
1942 }
1943
1944 void ide_unregister (unsigned int index)
1945 {
1946 struct gendisk *gd, **gdp;
1947 ide_drive_t *drive, *d;
1948 ide_hwif_t *hwif, *g;
1949 ide_hwgroup_t *hwgroup;
1950 int irq_count = 0, unit, i;
1951 unsigned long flags;
1952 unsigned int p, minor;
1953 ide_hwif_t old_hwif;
1954
1955 if (index >= MAX_HWIFS)
1956 return;
1957 save_flags(flags); /* all CPUs */
1958 cli(); /* all CPUs */
1959 hwif = &ide_hwifs[index];
1960 if (!hwif->present)
1961 goto abort;
1962 for (unit = 0; unit < MAX_DRIVES; ++unit) {
1963 drive = &hwif->drives[unit];
1964 if (!drive->present)
1965 continue;
1966 if (drive->busy || drive->usage)
1967 goto abort;
1968 if (drive->driver != NULL && DRIVER(drive)->cleanup(drive))
1969 goto abort;
1970 }
1971 hwif->present = 0;
1972
1973 /*
1974 * All clear? Then blow away the buffer cache
1975 */
1976 sti();
1977 for (unit = 0; unit < MAX_DRIVES; ++unit) {
1978 drive = &hwif->drives[unit];
1979 if (!drive->present)
1980 continue;
1981 minor = drive->select.b.unit << PARTN_BITS;
1982 for (p = 0; p < (1<<PARTN_BITS); ++p) {
1983 if (drive->part[p].nr_sects > 0) {
1984 kdev_t devp = MKDEV(hwif->major, minor+p);
1985 struct super_block * sb = get_super(devp);
1986 if (sb) invalidate_inodes(sb);
1987 invalidate_buffers (devp);
1988 }
1989 }
1990 #ifdef CONFIG_PROC_FS
1991 destroy_proc_ide_drives(hwif);
1992 #endif
1993 }
1994 cli();
1995 hwgroup = hwif->hwgroup;
1996
1997 /*
1998 * free the irq if we were the only hwif using it
1999 */
2000 g = hwgroup->hwif;
2001 do {
2002 if (g->irq == hwif->irq)
2003 ++irq_count;
2004 g = g->next;
2005 } while (g != hwgroup->hwif);
2006 if (irq_count == 1)
2007 free_irq(hwif->irq, hwgroup);
2008
2009 /*
2010 * Note that we only release the standard ports,
2011 * and do not even try to handle any extra ports
2012 * allocated for weird IDE interface chipsets.
2013 */
2014 hwif_unregister(hwif);
2015
2016 /*
2017 * Remove us from the hwgroup, and free
2018 * the hwgroup if we were the only member
2019 */
2020 d = hwgroup->drive;
2021 for (i = 0; i < MAX_DRIVES; ++i) {
2022 drive = &hwif->drives[i];
2023 if (drive->de) {
2024 devfs_unregister (drive->de);
2025 drive->de = NULL;
2026 }
2027 if (!drive->present)
2028 continue;
2029 while (hwgroup->drive->next != drive)
2030 hwgroup->drive = hwgroup->drive->next;
2031 hwgroup->drive->next = drive->next;
2032 if (hwgroup->drive == drive)
2033 hwgroup->drive = NULL;
2034 if (drive->id != NULL) {
2035 kfree(drive->id);
2036 drive->id = NULL;
2037 }
2038 drive->present = 0;
2039 blk_cleanup_queue(&drive->queue);
2040 }
2041 if (d->present)
2042 hwgroup->drive = d;
2043 while (hwgroup->hwif->next != hwif)
2044 hwgroup->hwif = hwgroup->hwif->next;
2045 hwgroup->hwif->next = hwif->next;
2046 if (hwgroup->hwif == hwif)
2047 kfree(hwgroup);
2048 else
2049 hwgroup->hwif = HWIF(hwgroup->drive);
2050
2051 #if defined(CONFIG_BLK_DEV_IDEDMA) && !defined(CONFIG_DMA_NONPCI)
2052 if (hwif->dma_base) {
2053 (void) ide_release_dma(hwif);
2054 hwif->dma_base = 0;
2055 }
2056 #endif /* (CONFIG_BLK_DEV_IDEDMA) && !(CONFIG_DMA_NONPCI) */
2057
2058 /*
2059 * Remove us from the kernel's knowledge
2060 */
2061 unregister_blkdev(hwif->major, hwif->name);
2062 kfree(blksize_size[hwif->major]);
2063 kfree(max_sectors[hwif->major]);
2064 kfree(max_readahead[hwif->major]);
2065 blk_dev[hwif->major].data = NULL;
2066 blk_dev[hwif->major].queue = NULL;
2067 blksize_size[hwif->major] = NULL;
2068 for (gdp = &gendisk_head; *gdp; gdp = &((*gdp)->next))
2069 if (*gdp == hwif->gd)
2070 break;
2071 if (*gdp == NULL)
2072 printk("gd not in disk chain!\n");
2073 else {
2074 gd = *gdp; *gdp = gd->next;
2075 kfree(gd->sizes);
2076 kfree(gd->part);
2077 if (gd->de_arr)
2078 kfree (gd->de_arr);
2079 if (gd->flags)
2080 kfree (gd->flags);
2081 kfree(gd);
2082 }
2083 old_hwif = *hwif;
2084 init_hwif_data (index); /* restore hwif data to pristine status */
2085 hwif->hwgroup = old_hwif.hwgroup;
2086 hwif->tuneproc = old_hwif.tuneproc;
2087 hwif->speedproc = old_hwif.speedproc;
2088 hwif->selectproc = old_hwif.selectproc;
2089 hwif->resetproc = old_hwif.resetproc;
2090 hwif->intrproc = old_hwif.intrproc;
2091 hwif->maskproc = old_hwif.maskproc;
2092 hwif->quirkproc = old_hwif.quirkproc;
2093 hwif->rwproc = old_hwif.rwproc;
2094 hwif->dmaproc = old_hwif.dmaproc;
2095 hwif->dma_base = old_hwif.dma_base;
2096 hwif->dma_extra = old_hwif.dma_extra;
2097 hwif->config_data = old_hwif.config_data;
2098 hwif->select_data = old_hwif.select_data;
2099 hwif->proc = old_hwif.proc;
2100 #ifndef CONFIG_BLK_DEV_IDECS
2101 hwif->irq = old_hwif.irq;
2102 #endif /* CONFIG_BLK_DEV_IDECS */
2103 hwif->major = old_hwif.major;
2104 hwif->chipset = old_hwif.chipset;
2105 hwif->autodma = old_hwif.autodma;
2106 hwif->udma_four = old_hwif.udma_four;
2107 #ifdef CONFIG_BLK_DEV_IDEPCI
2108 hwif->pci_dev = old_hwif.pci_dev;
2109 hwif->pci_devid = old_hwif.pci_devid;
2110 #endif /* CONFIG_BLK_DEV_IDEPCI */
2111 hwif->straight8 = old_hwif.straight8;
2112 hwif->hwif_data = old_hwif.hwif_data;
2113 abort:
2114 restore_flags(flags); /* all CPUs */
2115 }
2116
2117 /*
2118 * Setup hw_regs_t structure described by parameters. You
2119 * may set up the hw structure yourself OR use this routine to
2120 * do it for you.
2121 */
2122 void ide_setup_ports ( hw_regs_t *hw,
2123 ide_ioreg_t base, int *offsets,
2124 ide_ioreg_t ctrl, ide_ioreg_t intr,
2125 ide_ack_intr_t *ack_intr, int irq)
2126 {
2127 int i;
2128
2129 for (i = 0; i < IDE_NR_PORTS; i++) {
2130 if (offsets[i] == -1) {
2131 switch(i) {
2132 case IDE_CONTROL_OFFSET:
2133 hw->io_ports[i] = ctrl;
2134 break;
2135 #if defined(CONFIG_AMIGA) || defined(CONFIG_MAC)
2136 case IDE_IRQ_OFFSET:
2137 hw->io_ports[i] = intr;
2138 break;
2139 #endif /* (CONFIG_AMIGA) || (CONFIG_MAC) */
2140 default:
2141 hw->io_ports[i] = 0;
2142 break;
2143 }
2144 } else {
2145 hw->io_ports[i] = base + offsets[i];
2146 }
2147 }
2148 hw->irq = irq;
2149 hw->dma = NO_DMA;
2150 hw->ack_intr = ack_intr;
2151 }
2152
2153 /*
2154 * Register an IDE interface, specifing exactly the registers etc
2155 * Set init=1 iff calling before probes have taken place.
2156 */
2157 int ide_register_hw (hw_regs_t *hw, ide_hwif_t **hwifp)
2158 {
2159 int index, retry = 1;
2160 ide_hwif_t *hwif;
2161
2162 do {
2163 for (index = 0; index < MAX_HWIFS; ++index) {
2164 hwif = &ide_hwifs[index];
2165 if (hwif->hw.io_ports[IDE_DATA_OFFSET] == hw->io_ports[IDE_DATA_OFFSET])
2166 goto found;
2167 }
2168 for (index = 0; index < MAX_HWIFS; ++index) {
2169 hwif = &ide_hwifs[index];
2170 if ((!hwif->present && !hwif->mate && !initializing) ||
2171 (!hwif->hw.io_ports[IDE_DATA_OFFSET] && initializing))
2172 goto found;
2173 }
2174 for (index = 0; index < MAX_HWIFS; index++)
2175 ide_unregister(index);
2176 } while (retry--);
2177 return -1;
2178 found:
2179 if (hwif->present)
2180 ide_unregister(index);
2181 if (hwif->present)
2182 return -1;
2183 memcpy(&hwif->hw, hw, sizeof(*hw));
2184 memcpy(hwif->io_ports, hwif->hw.io_ports, sizeof(hwif->hw.io_ports));
2185 hwif->irq = hw->irq;
2186 hwif->noprobe = 0;
2187
2188 if (!initializing) {
2189 ide_probe_module();
2190 #ifdef CONFIG_PROC_FS
2191 create_proc_ide_interfaces();
2192 #endif
2193 ide_driver_module();
2194 }
2195
2196 if (hwifp)
2197 *hwifp = hwif;
2198
2199 return (initializing || hwif->present) ? index : -1;
2200 }
2201
2202 /*
2203 * Compatability function with existing drivers. If you want
2204 * something different, use the function above.
2205 */
2206 int ide_register (int arg1, int arg2, int irq)
2207 {
2208 hw_regs_t hw;
2209 ide_init_hwif_ports(&hw, (ide_ioreg_t) arg1, (ide_ioreg_t) arg2, NULL);
2210 hw.irq = irq;
2211 return ide_register_hw(&hw, NULL);
2212 }
2213
2214 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)
2215 {
2216 ide_settings_t **p = (ide_settings_t **) &drive->settings, *setting = NULL;
2217
2218 while ((*p) && strcmp((*p)->name, name) < 0)
2219 p = &((*p)->next);
2220 if ((setting = kmalloc(sizeof(*setting), GFP_KERNEL)) == NULL)
2221 goto abort;
2222 memset(setting, 0, sizeof(*setting));
2223 if ((setting->name = kmalloc(strlen(name) + 1, GFP_KERNEL)) == NULL)
2224 goto abort;
2225 strcpy(setting->name, name); setting->rw = rw;
2226 setting->read_ioctl = read_ioctl; setting->write_ioctl = write_ioctl;
2227 setting->data_type = data_type; setting->min = min;
2228 setting->max = max; setting->mul_factor = mul_factor;
2229 setting->div_factor = div_factor; setting->data = data;
2230 setting->set = set; setting->next = *p;
2231 if (drive->driver)
2232 setting->auto_remove = 1;
2233 *p = setting;
2234 return;
2235 abort:
2236 if (setting)
2237 kfree(setting);
2238 }
2239
2240 void ide_remove_setting (ide_drive_t *drive, char *name)
2241 {
2242 ide_settings_t **p = (ide_settings_t **) &drive->settings, *setting;
2243
2244 while ((*p) && strcmp((*p)->name, name))
2245 p = &((*p)->next);
2246 if ((setting = (*p)) == NULL)
2247 return;
2248 (*p) = setting->next;
2249 kfree(setting->name);
2250 kfree(setting);
2251 }
2252
2253 static ide_settings_t *ide_find_setting_by_ioctl (ide_drive_t *drive, int cmd)
2254 {
2255 ide_settings_t *setting = drive->settings;
2256
2257 while (setting) {
2258 if (setting->read_ioctl == cmd || setting->write_ioctl == cmd)
2259 break;
2260 setting = setting->next;
2261 }
2262 return setting;
2263 }
2264
2265 ide_settings_t *ide_find_setting_by_name (ide_drive_t *drive, char *name)
2266 {
2267 ide_settings_t *setting = drive->settings;
2268
2269 while (setting) {
2270 if (strcmp(setting->name, name) == 0)
2271 break;
2272 setting = setting->next;
2273 }
2274 return setting;
2275 }
2276
2277 static void auto_remove_settings (ide_drive_t *drive)
2278 {
2279 ide_settings_t *setting;
2280 repeat:
2281 setting = drive->settings;
2282 while (setting) {
2283 if (setting->auto_remove) {
2284 ide_remove_setting(drive, setting->name);
2285 goto repeat;
2286 }
2287 setting = setting->next;
2288 }
2289 }
2290
2291 int ide_read_setting (ide_drive_t *drive, ide_settings_t *setting)
2292 {
2293 int val = -EINVAL;
2294 unsigned long flags;
2295
2296 if ((setting->rw & SETTING_READ)) {
2297 spin_lock_irqsave(&io_request_lock, flags);
2298 switch(setting->data_type) {
2299 case TYPE_BYTE:
2300 val = *((u8 *) setting->data);
2301 break;
2302 case TYPE_SHORT:
2303 val = *((u16 *) setting->data);
2304 break;
2305 case TYPE_INT:
2306 case TYPE_INTA:
2307 val = *((u32 *) setting->data);
2308 break;
2309 }
2310 spin_unlock_irqrestore(&io_request_lock, flags);
2311 }
2312 return val;
2313 }
2314
2315 int ide_spin_wait_hwgroup (ide_drive_t *drive)
2316 {
2317 ide_hwgroup_t *hwgroup = HWGROUP(drive);
2318 unsigned long timeout = jiffies + (3 * HZ);
2319
2320 spin_lock_irq(&io_request_lock);
2321
2322 while (hwgroup->busy) {
2323 unsigned long lflags;
2324 spin_unlock_irq(&io_request_lock);
2325 __save_flags(lflags); /* local CPU only */
2326 __sti(); /* local CPU only; needed for jiffies */
2327 if (0 < (signed long)(jiffies - timeout)) {
2328 __restore_flags(lflags); /* local CPU only */
2329 printk("%s: channel busy\n", drive->name);
2330 return -EBUSY;
2331 }
2332 __restore_flags(lflags); /* local CPU only */
2333 spin_lock_irq(&io_request_lock);
2334 }
2335 return 0;
2336 }
2337
2338 /*
2339 * FIXME: This should be changed to enqueue a special request
2340 * to the driver to change settings, and then wait on a sema for completion.
2341 * The current scheme of polling is kludgey, though safe enough.
2342 */
2343 int ide_write_setting (ide_drive_t *drive, ide_settings_t *setting, int val)
2344 {
2345 int i;
2346 u32 *p;
2347
2348 if (!capable(CAP_SYS_ADMIN))
2349 return -EACCES;
2350 if (!(setting->rw & SETTING_WRITE))
2351 return -EPERM;
2352 if (val < setting->min || val > setting->max)
2353 return -EINVAL;
2354 if (setting->set)
2355 return setting->set(drive, val);
2356 if (ide_spin_wait_hwgroup(drive))
2357 return -EBUSY;
2358 switch (setting->data_type) {
2359 case TYPE_BYTE:
2360 *((u8 *) setting->data) = val;
2361 break;
2362 case TYPE_SHORT:
2363 *((u16 *) setting->data) = val;
2364 break;
2365 case TYPE_INT:
2366 *((u32 *) setting->data) = val;
2367 break;
2368 case TYPE_INTA:
2369 p = (u32 *) setting->data;
2370 for (i = 0; i < 1 << PARTN_BITS; i++, p++)
2371 *p = val;
2372 break;
2373 }
2374 spin_unlock_irq(&io_request_lock);
2375 return 0;
2376 }
2377
2378 static int set_io_32bit(ide_drive_t *drive, int arg)
2379 {
2380 drive->io_32bit = arg;
2381 #ifdef CONFIG_BLK_DEV_DTC2278
2382 if (HWIF(drive)->chipset == ide_dtc2278)
2383 HWIF(drive)->drives[!drive->select.b.unit].io_32bit = arg;
2384 #endif /* CONFIG_BLK_DEV_DTC2278 */
2385 return 0;
2386 }
2387
2388 static int set_using_dma (ide_drive_t *drive, int arg)
2389 {
2390 if (!drive->driver || !DRIVER(drive)->supports_dma)
2391 return -EPERM;
2392 if (!drive->id || !(drive->id->capability & 1) || !HWIF(drive)->dmaproc)
2393 return -EPERM;
2394 if (HWIF(drive)->dmaproc(arg ? ide_dma_on : ide_dma_off, drive))
2395 return -EIO;
2396 return 0;
2397 }
2398
2399 static int set_pio_mode (ide_drive_t *drive, int arg)
2400 {
2401 struct request rq;
2402
2403 if (!HWIF(drive)->tuneproc)
2404 return -ENOSYS;
2405 if (drive->special.b.set_tune)
2406 return -EBUSY;
2407 ide_init_drive_cmd(&rq);
2408 drive->tune_req = (byte) arg;
2409 drive->special.b.set_tune = 1;
2410 (void) ide_do_drive_cmd (drive, &rq, ide_wait);
2411 return 0;
2412 }
2413
2414 void ide_add_generic_settings (ide_drive_t *drive)
2415 {
2416 /*
2417 * drive setting name read/write access read ioctl write ioctl data type min max mul_factor div_factor data pointer set function
2418 */
2419 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);
2420 ide_add_setting(drive, "keepsettings", SETTING_RW, HDIO_GET_KEEPSETTINGS, HDIO_SET_KEEPSETTINGS, TYPE_BYTE, 0, 1, 1, 1, &drive->keep_settings, NULL);
2421 ide_add_setting(drive, "nice1", SETTING_RW, -1, -1, TYPE_BYTE, 0, 1, 1, 1, &drive->nice1, NULL);
2422 ide_add_setting(drive, "pio_mode", SETTING_WRITE, -1, HDIO_SET_PIO_MODE, TYPE_BYTE, 0, 255, 1, 1, NULL, set_pio_mode);
2423 ide_add_setting(drive, "slow", SETTING_RW, -1, -1, TYPE_BYTE, 0, 1, 1, 1, &drive->slow, NULL);
2424 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);
2425 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);
2426 ide_add_setting(drive, "ide_scsi", SETTING_RW, -1, -1, TYPE_BYTE, 0, 1, 1, 1, &drive->scsi, NULL);
2427 ide_add_setting(drive, "init_speed", SETTING_RW, -1, -1, TYPE_BYTE, 0, 69, 1, 1, &drive->init_speed, NULL);
2428 ide_add_setting(drive, "current_speed", SETTING_RW, -1, -1, TYPE_BYTE, 0, 69, 1, 1, &drive->current_speed, NULL);
2429 ide_add_setting(drive, "number", SETTING_RW, -1, -1, TYPE_BYTE, 0, 3, 1, 1, &drive->dn, NULL);
2430 }
2431
2432 int ide_wait_cmd (ide_drive_t *drive, int cmd, int nsect, int feature, int sectors, byte *buf)
2433 {
2434 struct request rq;
2435 byte buffer[4];
2436
2437 if (!buf)
2438 buf = buffer;
2439 memset(buf, 0, 4 + SECTOR_WORDS * 4 * sectors);
2440 ide_init_drive_cmd(&rq);
2441 rq.buffer = buf;
2442 *buf++ = cmd;
2443 *buf++ = nsect;
2444 *buf++ = feature;
2445 *buf++ = sectors;
2446 return ide_do_drive_cmd(drive, &rq, ide_wait);
2447 }
2448
2449 int ide_wait_cmd_task (ide_drive_t *drive, byte *buf)
2450 {
2451 struct request rq;
2452
2453 ide_init_drive_cmd(&rq);
2454 rq.cmd = IDE_DRIVE_TASK;
2455 rq.buffer = buf;
2456 return ide_do_drive_cmd(drive, &rq, ide_wait);
2457 }
2458
2459 /*
2460 * Delay for *at least* 50ms. As we don't know how much time is left
2461 * until the next tick occurs, we wait an extra tick to be safe.
2462 * This is used only during the probing/polling for drives at boot time.
2463 *
2464 * However, its usefullness may be needed in other places, thus we export it now.
2465 * The future may change this to a millisecond setable delay.
2466 */
2467 void ide_delay_50ms (void)
2468 {
2469 #ifndef CONFIG_BLK_DEV_IDECS
2470 unsigned long timeout = jiffies + ((HZ + 19)/20) + 1;
2471 while (0 < (signed long)(timeout - jiffies));
2472 #else
2473 __set_current_state(TASK_UNINTERRUPTIBLE);
2474 schedule_timeout(HZ/20);
2475 #endif /* CONFIG_BLK_DEV_IDECS */
2476 }
2477
2478 int system_bus_clock (void)
2479 {
2480 return((int) ((!system_bus_speed) ? ide_system_bus_speed() : system_bus_speed ));
2481 }
2482
2483 static int ide_ioctl (struct inode *inode, struct file *file,
2484 unsigned int cmd, unsigned long arg)
2485 {
2486 int err = 0, major, minor;
2487 ide_drive_t *drive;
2488 struct request rq;
2489 kdev_t dev;
2490 ide_settings_t *setting;
2491
2492 if (!inode || !(dev = inode->i_rdev))
2493 return -EINVAL;
2494 major = MAJOR(dev); minor = MINOR(dev);
2495 if ((drive = get_info_ptr(inode->i_rdev)) == NULL)
2496 return -ENODEV;
2497
2498 if ((setting = ide_find_setting_by_ioctl(drive, cmd)) != NULL) {
2499 if (cmd == setting->read_ioctl) {
2500 err = ide_read_setting(drive, setting);
2501 return err >= 0 ? put_user(err, (long *) arg) : err;
2502 } else {
2503 if ((MINOR(inode->i_rdev) & PARTN_MASK))
2504 return -EINVAL;
2505 return ide_write_setting(drive, setting, arg);
2506 }
2507 }
2508
2509 ide_init_drive_cmd (&rq);
2510 switch (cmd) {
2511 case HDIO_GETGEO:
2512 {
2513 struct hd_geometry *loc = (struct hd_geometry *) arg;
2514 unsigned short bios_cyl = drive->bios_cyl; /* truncate */
2515 if (!loc || (drive->media != ide_disk && drive->media != ide_floppy)) return -EINVAL;
2516 if (put_user(drive->bios_head, (byte *) &loc->heads)) return -EFAULT;
2517 if (put_user(drive->bios_sect, (byte *) &loc->sectors)) return -EFAULT;
2518 if (put_user(bios_cyl, (unsigned short *) &loc->cylinders)) return -EFAULT;
2519 if (put_user((unsigned)drive->part[MINOR(inode->i_rdev)&PARTN_MASK].start_sect,
2520 (unsigned long *) &loc->start)) return -EFAULT;
2521 return 0;
2522 }
2523
2524 case HDIO_GETGEO_BIG:
2525 {
2526 struct hd_big_geometry *loc = (struct hd_big_geometry *) arg;
2527 if (!loc || (drive->media != ide_disk && drive->media != ide_floppy)) return -EINVAL;
2528 if (put_user(drive->bios_head, (byte *) &loc->heads)) return -EFAULT;
2529 if (put_user(drive->bios_sect, (byte *) &loc->sectors)) return -EFAULT;
2530 if (put_user(drive->bios_cyl, (unsigned int *) &loc->cylinders)) return -EFAULT;
2531 if (put_user((unsigned)drive->part[MINOR(inode->i_rdev)&PARTN_MASK].start_sect,
2532 (unsigned long *) &loc->start)) return -EFAULT;
2533 return 0;
2534 }
2535
2536 case HDIO_GETGEO_BIG_RAW:
2537 {
2538 struct hd_big_geometry *loc = (struct hd_big_geometry *) arg;
2539 if (!loc || (drive->media != ide_disk && drive->media != ide_floppy)) return -EINVAL;
2540 if (put_user(drive->head, (byte *) &loc->heads)) return -EFAULT;
2541 if (put_user(drive->sect, (byte *) &loc->sectors)) return -EFAULT;
2542 if (put_user(drive->cyl, (unsigned int *) &loc->cylinders)) return -EFAULT;
2543 if (put_user((unsigned)drive->part[MINOR(inode->i_rdev)&PARTN_MASK].start_sect,
2544 (unsigned long *) &loc->start)) return -EFAULT;
2545 return 0;
2546 }
2547
2548 case BLKGETSIZE: /* Return device size */
2549 return put_user(drive->part[MINOR(inode->i_rdev)&PARTN_MASK].nr_sects, (long *) arg);
2550
2551 case BLKRRPART: /* Re-read partition tables */
2552 if (!capable(CAP_SYS_ADMIN)) return -EACCES;
2553 return ide_revalidate_disk(inode->i_rdev);
2554
2555 case HDIO_OBSOLETE_IDENTITY:
2556 case HDIO_GET_IDENTITY:
2557 if (MINOR(inode->i_rdev) & PARTN_MASK)
2558 return -EINVAL;
2559 if (drive->id == NULL)
2560 return -ENOMSG;
2561 if (copy_to_user((char *)arg, (char *)drive->id, (cmd == HDIO_GET_IDENTITY) ? sizeof(*drive->id) : 142))
2562 return -EFAULT;
2563 return 0;
2564
2565 case HDIO_GET_NICE:
2566 return put_user(drive->dsc_overlap << IDE_NICE_DSC_OVERLAP |
2567 drive->atapi_overlap << IDE_NICE_ATAPI_OVERLAP |
2568 drive->nice0 << IDE_NICE_0 |
2569 drive->nice1 << IDE_NICE_1 |
2570 drive->nice2 << IDE_NICE_2,
2571 (long *) arg);
2572 case HDIO_DRIVE_CMD:
2573 {
2574 byte args[4], *argbuf = args;
2575 byte xfer_rate = 0;
2576 int argsize = 4;
2577 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO)) return -EACCES;
2578 if (NULL == (void *) arg)
2579 return ide_do_drive_cmd(drive, &rq, ide_wait);
2580 if (copy_from_user(args, (void *)arg, 4))
2581 return -EFAULT;
2582 if (args[3]) {
2583 argsize = 4 + (SECTOR_WORDS * 4 * args[3]);
2584 argbuf = kmalloc(argsize, GFP_KERNEL);
2585 if (argbuf == NULL)
2586 return -ENOMEM;
2587 memcpy(argbuf, args, 4);
2588 }
2589
2590 if (set_transfer(drive, args[0], args[1], args[2])) {
2591 xfer_rate = args[1];
2592 if (ide_ata66_check(drive, args[0], args[1], args[2]))
2593 goto abort;
2594 }
2595
2596 err = ide_wait_cmd(drive, args[0], args[1], args[2], args[3], argbuf);
2597
2598 if (!err && xfer_rate) {
2599 /* active-retuning-calls future */
2600 if ((HWIF(drive)->speedproc) != NULL)
2601 HWIF(drive)->speedproc(drive, xfer_rate);
2602 ide_driveid_update(drive);
2603 }
2604 abort:
2605 if (copy_to_user((void *)arg, argbuf, argsize))
2606 err = -EFAULT;
2607 if (argsize > 4)
2608 kfree(argbuf);
2609 return err;
2610 }
2611 case HDIO_DRIVE_TASK:
2612 {
2613 byte args[7], *argbuf = args;
2614 int argsize = 7;
2615 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO)) return -EACCES;
2616 if (copy_from_user(args, (void *)arg, 7))
2617 return -EFAULT;
2618 err = ide_wait_cmd_task(drive, argbuf);
2619 if (copy_to_user((void *)arg, argbuf, argsize))
2620 err = -EFAULT;
2621 return err;
2622 }
2623 case HDIO_SCAN_HWIF:
2624 {
2625 int args[3];
2626 if (!capable(CAP_SYS_ADMIN)) return -EACCES;
2627 if (copy_from_user(args, (void *)arg, 3 * sizeof(int)))
2628 return -EFAULT;
2629 if (ide_register(args[0], args[1], args[2]) == -1)
2630 return -EIO;
2631 return 0;
2632 }
2633 case HDIO_UNREGISTER_HWIF:
2634 if (!capable(CAP_SYS_ADMIN)) return -EACCES;
2635 /* (arg > MAX_HWIFS) checked in function */
2636 ide_unregister(arg);
2637 return 0;
2638 case HDIO_SET_NICE:
2639 if (!capable(CAP_SYS_ADMIN)) return -EACCES;
2640 if (drive->driver == NULL)
2641 return -EPERM;
2642 if (arg != (arg & ((1 << IDE_NICE_DSC_OVERLAP) | (1 << IDE_NICE_1))))
2643 return -EPERM;
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;
2647 return -EPERM;
2648 }
2649 drive->nice1 = (arg >> IDE_NICE_1) & 1;
2650 return 0;
2651 case HDIO_DRIVE_RESET:
2652 if (!capable(CAP_SYS_ADMIN)) return -EACCES;
2653 (void) ide_do_reset(drive);
2654 if (drive->suspend_reset) {
2655 /*
2656 * APM WAKE UP todo !!
2657 * int nogoodpower = 1;
2658 * while(nogoodpower) {
2659 * check_power1() or check_power2()
2660 * nogoodpower = 0;
2661 * }
2662 * HWIF(drive)->multiproc(drive);
2663 */
2664 return ide_revalidate_disk(inode->i_rdev);
2665 }
2666 return 0;
2667
2668 case BLKROSET:
2669 case BLKROGET:
2670 case BLKFLSBUF:
2671 case BLKSSZGET:
2672 case BLKPG:
2673 case BLKELVGET:
2674 case BLKELVSET:
2675 return blk_ioctl(inode->i_rdev, cmd, arg);
2676
2677 default:
2678 if (drive->driver != NULL)
2679 return DRIVER(drive)->ioctl(drive, inode, file, cmd, arg);
2680 return -EPERM;
2681 }
2682 }
2683
2684 static int ide_check_media_change (kdev_t i_rdev)
2685 {
2686 ide_drive_t *drive;
2687
2688 if ((drive = get_info_ptr(i_rdev)) == NULL)
2689 return -ENODEV;
2690 if (drive->driver != NULL)
2691 return DRIVER(drive)->media_change(drive);
2692 return 0;
2693 }
2694
2695 void ide_fixstring (byte *s, const int bytecount, const int byteswap)
2696 {
2697 byte *p = s, *end = &s[bytecount & ~1]; /* bytecount must be even */
2698
2699 if (byteswap) {
2700 /* convert from big-endian to host byte order */
2701 for (p = end ; p != s;) {
2702 unsigned short *pp = (unsigned short *) (p -= 2);
2703 *pp = ntohs(*pp);
2704 }
2705 }
2706
2707 /* strip leading blanks */
2708 while (s != end && *s == ' ')
2709 ++s;
2710
2711 /* compress internal blanks and strip trailing blanks */
2712 while (s != end && *s) {
2713 if (*s++ != ' ' || (s != end && *s && *s != ' '))
2714 *p++ = *(s-1);
2715 }
2716
2717 /* wipe out trailing garbage */
2718 while (p != end)
2719 *p++ = '\0';
2720 }
2721
2722 /*
2723 * stridx() returns the offset of c within s,
2724 * or -1 if c is '\0' or not found within s.
2725 */
2726 static int __init stridx (const char *s, char c)
2727 {
2728 char *i = strchr(s, c);
2729 return (i && c) ? i - s : -1;
2730 }
2731
2732 /*
2733 * match_parm() does parsing for ide_setup():
2734 *
2735 * 1. the first char of s must be '='.
2736 * 2. if the remainder matches one of the supplied keywords,
2737 * the index (1 based) of the keyword is negated and returned.
2738 * 3. if the remainder is a series of no more than max_vals numbers
2739 * separated by commas, the numbers are saved in vals[] and a
2740 * count of how many were saved is returned. Base10 is assumed,
2741 * and base16 is allowed when prefixed with "0x".
2742 * 4. otherwise, zero is returned.
2743 */
2744 static int __init match_parm (char *s, const char *keywords[], int vals[], int max_vals)
2745 {
2746 static const char *decimal = "0123456789";
2747 static const char *hex = "0123456789abcdef";
2748 int i, n;
2749
2750 if (*s++ == '=') {
2751 /*
2752 * Try matching against the supplied keywords,
2753 * and return -(index+1) if we match one
2754 */
2755 if (keywords != NULL) {
2756 for (i = 0; *keywords != NULL; ++i) {
2757 if (!strcmp(s, *keywords++))
2758 return -(i+1);
2759 }
2760 }
2761 /*
2762 * Look for a series of no more than "max_vals"
2763 * numeric values separated by commas, in base10,
2764 * or base16 when prefixed with "0x".
2765 * Return a count of how many were found.
2766 */
2767 for (n = 0; (i = stridx(decimal, *s)) >= 0;) {
2768 vals[n] = i;
2769 while ((i = stridx(decimal, *++s)) >= 0)
2770 vals[n] = (vals[n] * 10) + i;
2771 if (*s == 'x' && !vals[n]) {
2772 while ((i = stridx(hex, *++s)) >= 0)
2773 vals[n] = (vals[n] * 0x10) + i;
2774 }
2775 if (++n == max_vals)
2776 break;
2777 if (*s == ',' || *s == ';')
2778 ++s;
2779 }
2780 if (!*s)
2781 return n;
2782 }
2783 return 0; /* zero = nothing matched */
2784 }
2785
2786 /*
2787 * ide_setup() gets called VERY EARLY during initialization,
2788 * to handle kernel "command line" strings beginning with "hdx="
2789 * or "ide". Here is the complete set currently supported:
2790 *
2791 * "hdx=" is recognized for all "x" from "a" to "h", such as "hdc".
2792 * "idex=" is recognized for all "x" from "" to "3", such as "ide1".
2793 *
2794 * "hdx=noprobe" : drive may be present, but do not probe for it
2795 * "hdx=none" : drive is NOT present, ignore cmos and do not probe
2796 * "hdx=nowerr" : ignore the WRERR_STAT bit on this drive
2797 * "hdx=cdrom" : drive is present, and is a cdrom drive
2798 * "hdx=cyl,head,sect" : disk drive is present, with specified geometry
2799 * "hdx=noremap" : do not remap 0->1 even though EZD was detected
2800 * "hdx=autotune" : driver will attempt to tune interface speed
2801 * to the fastest PIO mode supported,
2802 * if possible for this drive only.
2803 * Not fully supported by all chipset types,
2804 * and quite likely to cause trouble with
2805 * older/odd IDE drives.
2806 *
2807 * "hdx=slow" : insert a huge pause after each access to the data
2808 * port. Should be used only as a last resort.
2809 *
2810 * "hdx=swapdata" : when the drive is a disk, byte swap all data
2811 * "hdx=bswap" : same as above..........
2812 * "hdxlun=xx" : set the drive last logical unit.
2813 * "hdx=flash" : allows for more than one ata_flash disk to be
2814 * registered. In most cases, only one device
2815 * will be present.
2816 * "hdx=scsi" : the return of the ide-scsi flag, this is useful for
2817 * allowwing ide-floppy, ide-tape, and ide-cdrom|writers
2818 * to use ide-scsi emulation on a device specific option.
2819 * "idebus=xx" : inform IDE driver of VESA/PCI bus speed in MHz,
2820 * where "xx" is between 20 and 66 inclusive,
2821 * used when tuning chipset PIO modes.
2822 * For PCI bus, 25 is correct for a P75 system,
2823 * 30 is correct for P90,P120,P180 systems,
2824 * and 33 is used for P100,P133,P166 systems.
2825 * If in doubt, use idebus=33 for PCI.
2826 * As for VLB, it is safest to not specify it.
2827 *
2828 * "idex=noprobe" : do not attempt to access/use this interface
2829 * "idex=base" : probe for an interface at the addr specified,
2830 * where "base" is usually 0x1f0 or 0x170
2831 * and "ctl" is assumed to be "base"+0x206
2832 * "idex=base,ctl" : specify both base and ctl
2833 * "idex=base,ctl,irq" : specify base, ctl, and irq number
2834 * "idex=autotune" : driver will attempt to tune interface speed
2835 * to the fastest PIO mode supported,
2836 * for all drives on this interface.
2837 * Not fully supported by all chipset types,
2838 * and quite likely to cause trouble with
2839 * older/odd IDE drives.
2840 * "idex=noautotune" : driver will NOT attempt to tune interface speed
2841 * This is the default for most chipsets,
2842 * except the cmd640.
2843 * "idex=serialize" : do not overlap operations on idex and ide(x^1)
2844 * "idex=four" : four drives on idex and ide(x^1) share same ports
2845 * "idex=reset" : reset interface before first use
2846 * "idex=dma" : enable DMA by default on both drives if possible
2847 * "idex=ata66" : informs the interface that it has an 80c cable
2848 * for chipsets that are ATA-66 capable, but
2849 * the ablity to bit test for detection is
2850 * currently unknown.
2851 * "ide=reverse" : Formerly called to pci sub-system, but now local.
2852 *
2853 * The following are valid ONLY on ide0, (except dc4030)
2854 * and the defaults for the base,ctl ports must not be altered.
2855 *
2856 * "ide0=dtc2278" : probe/support DTC2278 interface
2857 * "ide0=ht6560b" : probe/support HT6560B interface
2858 * "ide0=cmd640_vlb" : *REQUIRED* for VLB cards with the CMD640 chip
2859 * (not for PCI -- automatically detected)
2860 * "ide0=qd6580" : probe/support qd6580 interface
2861 * "ide0=ali14xx" : probe/support ali14xx chipsets (ALI M1439, M1443, M1445)
2862 * "ide0=umc8672" : probe/support umc8672 chipsets
2863 * "idex=dc4030" : probe/support Promise DC4030VL interface
2864 * "ide=doubler" : probe/support IDE doublers on Amiga
2865 */
2866 int __init ide_setup (char *s)
2867 {
2868 int i, vals[3];
2869 ide_hwif_t *hwif;
2870 ide_drive_t *drive;
2871 unsigned int hw, unit;
2872 const char max_drive = 'a' + ((MAX_HWIFS * MAX_DRIVES) - 1);
2873 const char max_hwif = '' + (MAX_HWIFS - 1);
2874
2875
2876 if (strncmp(s,"hd",2) == 0 && s[2] == '=') /* hd= is for hd.c */
2877 return 0; /* driver and not us */
2878
2879 if (strncmp(s,"ide",3) &&
2880 strncmp(s,"idebus",6) &&
2881 strncmp(s,"hd",2)) /* hdx= & hdxlun= */
2882 return 0;
2883
2884 printk("ide_setup: %s", s);
2885 init_ide_data ();
2886
2887 #ifdef CONFIG_BLK_DEV_IDEDOUBLER
2888 if (!strcmp(s, "ide=doubler")) {
2889 extern int ide_doubler;
2890
2891 printk(" : Enabled support for IDE doublers\n");
2892 ide_doubler = 1;
2893 return 1;
2894 }
2895 #endif /* CONFIG_BLK_DEV_IDEDOUBLER */
2896
2897 #ifdef CONFIG_BLK_DEV_IDEPCI
2898 if (!strcmp(s, "ide=reverse")) {
2899 ide_scan_direction = 1;
2900 printk(" : Enabled support for IDE inverse scan order.\n");
2901 return 1;
2902 }
2903 #endif /* CONFIG_BLK_DEV_IDEPCI */
2904
2905 /*
2906 * Look for drive options: "hdx="
2907 */
2908 if (s[0] == 'h' && s[1] == 'd' && s[2] >= 'a' && s[2] <= max_drive) {
2909 const char *hd_words[] = {"none", "noprobe", "nowerr", "cdrom",
2910 "serialize", "autotune", "noautotune",
2911 "slow", "swapdata", "bswap", "flash",
2912 "remap", "noremap", "scsi", NULL};
2913 unit = s[2] - 'a';
2914 hw = unit / MAX_DRIVES;
2915 unit = unit % MAX_DRIVES;
2916 hwif = &ide_hwifs[hw];
2917 drive = &hwif->drives[unit];
2918 if (strncmp(s + 4, "ide-", 4) == 0) {
2919 strncpy(drive->driver_req, s + 4, 9);
2920 goto done;
2921 }
2922 /*
2923 * Look for last lun option: "hdxlun="
2924 */
2925 if (s[3] == 'l' && s[4] == 'u' && s[5] == 'n') {
2926 if (match_parm(&s[6], NULL, vals, 1) != 1)
2927 goto bad_option;
2928 if (vals[0] >= 0 && vals[0] <= 7) {
2929 drive->last_lun = vals[0];
2930 drive->forced_lun = 1;
2931 } else
2932 printk(" -- BAD LAST LUN! Expected value from 0 to 7");
2933 goto done;
2934 }
2935 switch (match_parm(&s[3], hd_words, vals, 3)) {
2936 case -1: /* "none" */
2937 drive->nobios = 1; /* drop into "noprobe" */
2938 case -2: /* "noprobe" */
2939 drive->noprobe = 1;
2940 goto done;
2941 case -3: /* "nowerr" */
2942 drive->bad_wstat = BAD_R_STAT;
2943 hwif->noprobe = 0;
2944 goto done;
2945 case -4: /* "cdrom" */
2946 drive->present = 1;
2947 drive->media = ide_cdrom;
2948 hwif->noprobe = 0;
2949 goto done;
2950 case -5: /* "serialize" */
2951 printk(" -- USE \"ide%d=serialize\" INSTEAD", hw);
2952 goto do_serialize;
2953 case -6: /* "autotune" */
2954 drive->autotune = 1;
2955 goto done;
2956 case -7: /* "noautotune" */
2957 drive->autotune = 2;
2958 goto done;
2959 case -8: /* "slow" */
2960 drive->slow = 1;
2961 goto done;
2962 case -9: /* "swapdata" or "bswap" */
2963 case -10:
2964 drive->bswap = 1;
2965 goto done;
2966 case -11: /* "flash" */
2967 drive->ata_flash = 1;
2968 goto done;
2969 case -12: /* "remap" */
2970 drive->remap_0_to_1 = 1;
2971 goto done;
2972 case -13: /* "noremap" */
2973 drive->remap_0_to_1 = 2;
2974 goto done;
2975 case -14: /* "scsi" */
2976 #if defined(CONFIG_BLK_DEV_IDESCSI) && defined(CONFIG_SCSI)
2977 drive->scsi = 1;
2978 goto done;
2979 #else
2980 drive->scsi = 0;
2981 goto bad_option;
2982 #endif /* defined(CONFIG_BLK_DEV_IDESCSI) && defined(CONFIG_SCSI) */
2983 case 3: /* cyl,head,sect */
2984 drive->media = ide_disk;
2985 drive->cyl = drive->bios_cyl = vals[0];
2986 drive->head = drive->bios_head = vals[1];
2987 drive->sect = drive->bios_sect = vals[2];
2988 drive->present = 1;
2989 drive->forced_geom = 1;
2990 hwif->noprobe = 0;
2991 goto done;
2992 default:
2993 goto bad_option;
2994 }
2995 }
2996
2997 if (s[0] != 'i' || s[1] != 'd' || s[2] != 'e')
2998 goto bad_option;
2999 /*
3000 * Look for bus speed option: "idebus="
3001 */
3002 if (s[3] == 'b' && s[4] == 'u' && s[5] == 's') {
3003 if (match_parm(&s[6], NULL, vals, 1) != 1)
3004 goto bad_option;
3005 if (vals[0] >= 20 && vals[0] <= 66) {
3006 idebus_parameter = vals[0];
3007 } else
3008 printk(" -- BAD BUS SPEED! Expected value from 20 to 66");
3009 goto done;
3010 }
3011 /*
3012 * Look for interface options: "idex="
3013 */
3014 if (s[3] >= '' && s[3] <= max_hwif) {
3015 /*
3016 * Be VERY CAREFUL changing this: note hardcoded indexes below
3017 * -8,-9,-10 : are reserved for future idex calls to ease the hardcoding.
3018 */
3019 const char *ide_words[] = {
3020 "noprobe", "serialize", "autotune", "noautotune", "reset", "dma", "ata66",
3021 "minus8", "minus9", "minus10",
3022 "four", "qd6580", "ht6560b", "cmd640_vlb", "dtc2278", "umc8672", "ali14xx", "dc4030", NULL };
3023 hw = s[3] - '';
3024 hwif = &ide_hwifs[hw];
3025 i = match_parm(&s[4], ide_words, vals, 3);
3026
3027 /*
3028 * Cryptic check to ensure chipset not already set for hwif:
3029 */
3030 if (i > 0 || i <= -11) { /* is parameter a chipset name? */
3031 if (hwif->chipset != ide_unknown)
3032 goto bad_option; /* chipset already specified */
3033 if (i <= -11 && i != -18 && hw != 0)
3034 goto bad_hwif; /* chipset drivers are for "ide0=" only */
3035 if (i <= -11 && i != -18 && ide_hwifs[hw+1].chipset != ide_unknown)
3036 goto bad_option; /* chipset for 2nd port already specified */
3037 printk("\n");
3038 }
3039
3040 switch (i) {
3041 #ifdef CONFIG_BLK_DEV_PDC4030
3042 case -18: /* "dc4030" */
3043 {
3044 extern void init_pdc4030(void);
3045 init_pdc4030();
3046 goto done;
3047 }
3048 #endif /* CONFIG_BLK_DEV_PDC4030 */
3049 #ifdef CONFIG_BLK_DEV_ALI14XX
3050 case -17: /* "ali14xx" */
3051 {
3052 extern void init_ali14xx (void);
3053 init_ali14xx();
3054 goto done;
3055 }
3056 #endif /* CONFIG_BLK_DEV_ALI14XX */
3057 #ifdef CONFIG_BLK_DEV_UMC8672
3058 case -16: /* "umc8672" */
3059 {
3060 extern void init_umc8672 (void);
3061 init_umc8672();
3062 goto done;
3063 }
3064 #endif /* CONFIG_BLK_DEV_UMC8672 */
3065 #ifdef CONFIG_BLK_DEV_DTC2278
3066 case -15: /* "dtc2278" */
3067 {
3068 extern void init_dtc2278 (void);
3069 init_dtc2278();
3070 goto done;
3071 }
3072 #endif /* CONFIG_BLK_DEV_DTC2278 */
3073 #ifdef CONFIG_BLK_DEV_CMD640
3074 case -14: /* "cmd640_vlb" */
3075 {
3076 extern int cmd640_vlb; /* flag for cmd640.c */
3077 cmd640_vlb = 1;
3078 goto done;
3079 }
3080 #endif /* CONFIG_BLK_DEV_CMD640 */
3081 #ifdef CONFIG_BLK_DEV_HT6560B
3082 case -13: /* "ht6560b" */
3083 {
3084 extern void init_ht6560b (void);
3085 init_ht6560b();
3086 goto done;
3087 }
3088 #endif /* CONFIG_BLK_DEV_HT6560B */
3089 #if CONFIG_BLK_DEV_QD6580
3090 case -12: /* "qd6580" */
3091 {
3092 extern void init_qd6580 (void);
3093 init_qd6580();
3094 goto done;
3095 }
3096 #endif /* CONFIG_BLK_DEV_QD6580 */
3097 #ifdef CONFIG_BLK_DEV_4DRIVES
3098 case -11: /* "four" drives on one set of ports */
3099 {
3100 ide_hwif_t *mate = &ide_hwifs[hw^1];
3101 mate->drives[0].select.all ^= 0x20;
3102 mate->drives[1].select.all ^= 0x20;
3103 hwif->chipset = mate->chipset = ide_4drives;
3104 mate->irq = hwif->irq;
3105 memcpy(mate->io_ports, hwif->io_ports, sizeof(hwif->io_ports));
3106 goto do_serialize;
3107 }
3108 #endif /* CONFIG_BLK_DEV_4DRIVES */
3109 case -10: /* minus10 */
3110 case -9: /* minus9 */
3111 case -8: /* minus8 */
3112 goto bad_option;
3113 case -7: /* ata66 */
3114 #ifdef CONFIG_BLK_DEV_IDEPCI
3115 hwif->udma_four = 1;
3116 goto done;
3117 #else /* !CONFIG_BLK_DEV_IDEPCI */
3118 hwif->udma_four = 0;
3119 goto bad_hwif;
3120 #endif /* CONFIG_BLK_DEV_IDEPCI */
3121 case -6: /* dma */
3122 hwif->autodma = 1;
3123 goto done;
3124 case -5: /* "reset" */
3125 hwif->reset = 1;
3126 goto done;
3127 case -4: /* "noautotune" */
3128 hwif->drives[0].autotune = 2;
3129 hwif->drives[1].autotune = 2;
3130 goto done;
3131 case -3: /* "autotune" */
3132 hwif->drives[0].autotune = 1;
3133 hwif->drives[1].autotune = 1;
3134 goto done;
3135 case -2: /* "serialize" */
3136 do_serialize:
3137 hwif->mate = &ide_hwifs[hw^1];
3138 hwif->mate->mate = hwif;
3139 hwif->serialized = hwif->mate->serialized = 1;
3140 goto done;
3141
3142 case -1: /* "noprobe" */
3143 hwif->noprobe = 1;
3144 goto done;
3145
3146 case 1: /* base */
3147 vals[1] = vals[0] + 0x206; /* default ctl */
3148 case 2: /* base,ctl */
3149 vals[2] = 0; /* default irq = probe for it */
3150 case 3: /* base,ctl,irq */
3151 hwif->hw.irq = vals[2];
3152 ide_init_hwif_ports(&hwif->hw, (ide_ioreg_t) vals[0], (ide_ioreg_t) vals[1], &hwif->irq);
3153 memcpy(hwif->io_ports, hwif->hw.io_ports, sizeof(hwif->io_ports));
3154 hwif->irq = vals[2];
3155 hwif->noprobe = 0;
3156 hwif->chipset = ide_generic;
3157 goto done;
3158
3159 case 0: goto bad_option;
3160 default:
3161 printk(" -- SUPPORT NOT CONFIGURED IN THIS KERNEL\n");
3162 return 1;
3163 }
3164 }
3165 bad_option:
3166 printk(" -- BAD OPTION\n");
3167 return 1;
3168 bad_hwif:
3169 printk("-- NOT SUPPORTED ON ide%d", hw);
3170 done:
3171 printk("\n");
3172 return 1;
3173 }
3174
3175 /*
3176 * probe_for_hwifs() finds/initializes "known" IDE interfaces
3177 */
3178 static void __init probe_for_hwifs (void)
3179 {
3180 #ifdef CONFIG_PCI
3181 if (pci_present())
3182 {
3183 #ifdef CONFIG_BLK_DEV_IDEPCI
3184 ide_scan_pcibus(ide_scan_direction);
3185 #else
3186 #ifdef CONFIG_BLK_DEV_RZ1000
3187 {
3188 extern void ide_probe_for_rz100x(void);
3189 ide_probe_for_rz100x();
3190 }
3191 #endif /* CONFIG_BLK_DEV_RZ1000 */
3192 #endif /* CONFIG_BLK_DEV_IDEPCI */
3193 }
3194 #endif /* CONFIG_PCI */
3195
3196 #ifdef CONFIG_BLK_DEV_CMD640
3197 {
3198 extern void ide_probe_for_cmd640x(void);
3199 ide_probe_for_cmd640x();
3200 }
3201 #endif /* CONFIG_BLK_DEV_CMD640 */
3202 #ifdef CONFIG_BLK_DEV_PDC4030
3203 {
3204 extern int ide_probe_for_pdc4030(void);
3205 (void) ide_probe_for_pdc4030();
3206 }
3207 #endif /* CONFIG_BLK_DEV_PDC4030 */
3208 #ifdef CONFIG_BLK_DEV_IDE_PMAC
3209 {
3210 extern void pmac_ide_probe(void);
3211 pmac_ide_probe();
3212 }
3213 #endif /* CONFIG_BLK_DEV_IDE_PMAC */
3214 #ifdef CONFIG_BLK_DEV_IDE_ICSIDE
3215 {
3216 extern void icside_init(void);
3217 icside_init();
3218 }
3219 #endif /* CONFIG_BLK_DEV_IDE_ICSIDE */
3220 #ifdef CONFIG_BLK_DEV_IDE_RAPIDE
3221 {
3222 extern void rapide_init(void);
3223 rapide_init();
3224 }
3225 #endif /* CONFIG_BLK_DEV_IDE_RAPIDE */
3226 #ifdef CONFIG_BLK_DEV_GAYLE
3227 {
3228 extern void gayle_init(void);
3229 gayle_init();
3230 }
3231 #endif /* CONFIG_BLK_DEV_GAYLE */
3232 #ifdef CONFIG_BLK_DEV_FALCON_IDE
3233 {
3234 extern void falconide_init(void);
3235 falconide_init();
3236 }
3237 #endif /* CONFIG_BLK_DEV_FALCON_IDE */
3238 #ifdef CONFIG_BLK_DEV_MAC_IDE
3239 {
3240 extern void macide_init(void);
3241 macide_init();
3242 }
3243 #endif /* CONFIG_BLK_DEV_MAC_IDE */
3244 #ifdef CONFIG_BLK_DEV_Q40IDE
3245 {
3246 extern void q40ide_init(void);
3247 q40ide_init();
3248 }
3249 #endif /* CONFIG_BLK_DEV_Q40IDE */
3250 #ifdef CONFIG_BLK_DEV_BUDDHA
3251 {
3252 extern void buddha_init(void);
3253 buddha_init();
3254 }
3255 #endif /* CONFIG_BLK_DEV_BUDDHA */
3256 #if defined(CONFIG_BLK_DEV_ISAPNP) && defined(CONFIG_ISAPNP)
3257 {
3258 extern void pnpide_init(int enable);
3259 pnpide_init(1);
3260 }
3261 #endif /* CONFIG_BLK_DEV_ISAPNP */
3262 }
3263
3264 void __init ide_init_builtin_drivers (void)
3265 {
3266 /*
3267 * Probe for special PCI and other "known" interface chipsets
3268 */
3269 probe_for_hwifs ();
3270
3271 #ifdef CONFIG_BLK_DEV_IDE
3272 #if defined(__mc68000__) || defined(CONFIG_APUS)
3273 if (ide_hwifs[0].io_ports[IDE_DATA_OFFSET]) {
3274 ide_get_lock(&ide_lock, NULL, NULL); /* for atari only */
3275 disable_irq(ide_hwifs[0].irq); /* disable_irq_nosync ?? */
3276 // disable_irq_nosync(ide_hwifs[0].irq);
3277 }
3278 #endif /* __mc68000__ || CONFIG_APUS */
3279
3280 (void) ideprobe_init();
3281
3282 #if defined(__mc68000__) || defined(CONFIG_APUS)
3283 if (ide_hwifs[0].io_ports[IDE_DATA_OFFSET]) {
3284 enable_irq(ide_hwifs[0].irq);
3285 ide_release_lock(&ide_lock); /* for atari only */
3286 }
3287 #endif /* __mc68000__ || CONFIG_APUS */
3288 #endif /* CONFIG_BLK_DEV_IDE */
3289
3290 #ifdef CONFIG_PROC_FS
3291 proc_ide_create();
3292 #endif
3293
3294 /*
3295 * Attempt to match drivers for the available drives
3296 */
3297 #ifdef CONFIG_BLK_DEV_IDEDISK
3298 (void) idedisk_init();
3299 #endif /* CONFIG_BLK_DEV_IDEDISK */
3300 #ifdef CONFIG_BLK_DEV_IDECD
3301 (void) ide_cdrom_init();
3302 #endif /* CONFIG_BLK_DEV_IDECD */
3303 #ifdef CONFIG_BLK_DEV_IDETAPE
3304 (void) idetape_init();
3305 #endif /* CONFIG_BLK_DEV_IDETAPE */
3306 #ifdef CONFIG_BLK_DEV_IDEFLOPPY
3307 (void) idefloppy_init();
3308 #endif /* CONFIG_BLK_DEV_IDEFLOPPY */
3309 #ifdef CONFIG_BLK_DEV_IDESCSI
3310 #ifdef CONFIG_SCSI
3311 (void) idescsi_init();
3312 #else
3313 #warning ide scsi-emulation selected but no SCSI-subsystem in kernel
3314 #endif
3315 #endif /* CONFIG_BLK_DEV_IDESCSI */
3316 }
3317
3318 static int default_cleanup (ide_drive_t *drive)
3319 {
3320 return ide_unregister_subdriver(drive);
3321 }
3322
3323 static ide_startstop_t default_do_request(ide_drive_t *drive, struct request *rq, unsigned long block)
3324 {
3325 ide_end_request(0, HWGROUP(drive));
3326 return ide_stopped;
3327 }
3328
3329 static void default_end_request (byte uptodate, ide_hwgroup_t *hwgroup)
3330 {
3331 ide_end_request(uptodate, hwgroup);
3332 }
3333
3334 static int default_ioctl (ide_drive_t *drive, struct inode *inode, struct file *file,
3335 unsigned int cmd, unsigned long arg)
3336 {
3337 return -EIO;
3338 }
3339
3340 static int default_open (struct inode *inode, struct file *filp, ide_drive_t *drive)
3341 {
3342 drive->usage--;
3343 return -EIO;
3344 }
3345
3346 static void default_release (struct inode *inode, struct file *filp, ide_drive_t *drive)
3347 {
3348 }
3349
3350 static int default_check_media_change (ide_drive_t *drive)
3351 {
3352 return 1;
3353 }
3354
3355 static void default_pre_reset (ide_drive_t *drive)
3356 {
3357 }
3358
3359 static unsigned long default_capacity (ide_drive_t *drive)
3360 {
3361 return 0x7fffffff;
3362 }
3363
3364 static ide_startstop_t default_special (ide_drive_t *drive)
3365 {
3366 special_t *s = &drive->special;
3367
3368 s->all = 0;
3369 drive->mult_req = 0;
3370 return ide_stopped;
3371 }
3372
3373 static void setup_driver_defaults (ide_drive_t *drive)
3374 {
3375 ide_driver_t *d = drive->driver;
3376
3377 if (d->cleanup == NULL) d->cleanup = default_cleanup;
3378 if (d->do_request == NULL) d->do_request = default_do_request;
3379 if (d->end_request == NULL) d->end_request = default_end_request;
3380 if (d->ioctl == NULL) d->ioctl = default_ioctl;
3381 if (d->open == NULL) d->open = default_open;
3382 if (d->release == NULL) d->release = default_release;
3383 if (d->media_change == NULL) d->media_change = default_check_media_change;
3384 if (d->pre_reset == NULL) d->pre_reset = default_pre_reset;
3385 if (d->capacity == NULL) d->capacity = default_capacity;
3386 if (d->special == NULL) d->special = default_special;
3387 }
3388
3389 ide_drive_t *ide_scan_devices (byte media, const char *name, ide_driver_t *driver, int n)
3390 {
3391 unsigned int unit, index, i;
3392
3393 for (index = 0, i = 0; index < MAX_HWIFS; ++index) {
3394 ide_hwif_t *hwif = &ide_hwifs[index];
3395 if (!hwif->present)
3396 continue;
3397 for (unit = 0; unit < MAX_DRIVES; ++unit) {
3398 ide_drive_t *drive = &hwif->drives[unit];
3399 char *req = drive->driver_req;
3400 if (*req && !strstr(name, req))
3401 continue;
3402 if (drive->present && drive->media == media && drive->driver == driver && ++i > n)
3403 return drive;
3404 }
3405 }
3406 return NULL;
3407 }
3408
3409 int ide_register_subdriver (ide_drive_t *drive, ide_driver_t *driver, int version)
3410 {
3411 unsigned long flags;
3412
3413 save_flags(flags); /* all CPUs */
3414 cli(); /* all CPUs */
3415 if (version != IDE_SUBDRIVER_VERSION || !drive->present || drive->driver != NULL || drive->busy || drive->usage) {
3416 restore_flags(flags); /* all CPUs */
3417 return 1;
3418 }
3419 drive->driver = driver;
3420 setup_driver_defaults(drive);
3421 restore_flags(flags); /* all CPUs */
3422 if (drive->autotune != 2) {
3423 if (driver->supports_dma && HWIF(drive)->dmaproc != NULL) {
3424 /*
3425 * Force DMAing for the beginning of the check.
3426 * Some chipsets appear to do interesting things,
3427 * if not checked and cleared.
3428 * PARANOIA!!!
3429 */
3430 (void) (HWIF(drive)->dmaproc(ide_dma_off_quietly, drive));
3431 (void) (HWIF(drive)->dmaproc(ide_dma_check, drive));
3432 }
3433 drive->dsc_overlap = (drive->next != drive && driver->supports_dsc_overlap);
3434 drive->nice1 = 1;
3435 }
3436 drive->revalidate = 1;
3437 drive->suspend_reset = 0;
3438 #ifdef CONFIG_PROC_FS
3439 ide_add_proc_entries(drive->proc, generic_subdriver_entries, drive);
3440 ide_add_proc_entries(drive->proc, driver->proc, drive);
3441 #endif
3442 return 0;
3443 }
3444
3445 int ide_unregister_subdriver (ide_drive_t *drive)
3446 {
3447 unsigned long flags;
3448
3449 save_flags(flags); /* all CPUs */
3450 cli(); /* all CPUs */
3451 if (drive->usage || drive->busy || drive->driver == NULL || DRIVER(drive)->busy) {
3452 restore_flags(flags); /* all CPUs */
3453 return 1;
3454 }
3455 #if defined(CONFIG_BLK_DEV_ISAPNP) && defined(CONFIG_ISAPNP) && defined(MODULE)
3456 pnpide_init(0);
3457 #endif /* CONFIG_BLK_DEV_ISAPNP */
3458 #ifdef CONFIG_PROC_FS
3459 ide_remove_proc_entries(drive->proc, DRIVER(drive)->proc);
3460 ide_remove_proc_entries(drive->proc, generic_subdriver_entries);
3461 #endif
3462 auto_remove_settings(drive);
3463 drive->driver = NULL;
3464 restore_flags(flags); /* all CPUs */
3465 return 0;
3466 }
3467
3468 int ide_register_module (ide_module_t *module)
3469 {
3470 ide_module_t *p = ide_modules;
3471
3472 while (p) {
3473 if (p == module)
3474 return 1;
3475 p = p->next;
3476 }
3477 module->next = ide_modules;
3478 ide_modules = module;
3479 revalidate_drives();
3480 return 0;
3481 }
3482
3483 void ide_unregister_module (ide_module_t *module)
3484 {
3485 ide_module_t **p;
3486
3487 for (p = &ide_modules; (*p) && (*p) != module; p = &((*p)->next));
3488 if (*p)
3489 *p = (*p)->next;
3490 }
3491
3492 struct block_device_operations ide_fops[] = {{
3493 open: ide_open,
3494 release: ide_release,
3495 ioctl: ide_ioctl,
3496 check_media_change: ide_check_media_change,
3497 revalidate: ide_revalidate_disk
3498 }};
3499
3500 EXPORT_SYMBOL(ide_hwifs);
3501 EXPORT_SYMBOL(ide_register_module);
3502 EXPORT_SYMBOL(ide_unregister_module);
3503 EXPORT_SYMBOL(ide_spin_wait_hwgroup);
3504
3505 /*
3506 * Probe module
3507 */
3508 devfs_handle_t ide_devfs_handle;
3509
3510 EXPORT_SYMBOL(ide_probe);
3511 EXPORT_SYMBOL(drive_is_flashcard);
3512 EXPORT_SYMBOL(ide_timer_expiry);
3513 EXPORT_SYMBOL(ide_intr);
3514 EXPORT_SYMBOL(ide_fops);
3515 EXPORT_SYMBOL(ide_get_queue);
3516 EXPORT_SYMBOL(ide_add_generic_settings);
3517 EXPORT_SYMBOL(ide_devfs_handle);
3518 EXPORT_SYMBOL(do_ide_request);
3519 /*
3520 * Driver module
3521 */
3522 EXPORT_SYMBOL(ide_scan_devices);
3523 EXPORT_SYMBOL(ide_register_subdriver);
3524 EXPORT_SYMBOL(ide_unregister_subdriver);
3525 EXPORT_SYMBOL(ide_replace_subdriver);
3526 EXPORT_SYMBOL(ide_input_data);
3527 EXPORT_SYMBOL(ide_output_data);
3528 EXPORT_SYMBOL(atapi_input_bytes);
3529 EXPORT_SYMBOL(atapi_output_bytes);
3530 EXPORT_SYMBOL(ide_set_handler);
3531 EXPORT_SYMBOL(ide_dump_status);
3532 EXPORT_SYMBOL(ide_error);
3533 EXPORT_SYMBOL(ide_fixstring);
3534 EXPORT_SYMBOL(ide_wait_stat);
3535 EXPORT_SYMBOL(ide_do_reset);
3536 EXPORT_SYMBOL(ide_init_drive_cmd);
3537 EXPORT_SYMBOL(ide_do_drive_cmd);
3538 EXPORT_SYMBOL(ide_end_drive_cmd);
3539 EXPORT_SYMBOL(ide_end_request);
3540 EXPORT_SYMBOL(ide_revalidate_disk);
3541 EXPORT_SYMBOL(ide_cmd);
3542 EXPORT_SYMBOL(ide_wait_cmd);
3543 EXPORT_SYMBOL(ide_wait_cmd_task);
3544 EXPORT_SYMBOL(ide_delay_50ms);
3545 EXPORT_SYMBOL(ide_stall_queue);
3546 #ifdef CONFIG_PROC_FS
3547 EXPORT_SYMBOL(ide_add_proc_entries);
3548 EXPORT_SYMBOL(ide_remove_proc_entries);
3549 EXPORT_SYMBOL(proc_ide_read_geometry);
3550 EXPORT_SYMBOL(create_proc_ide_interfaces);
3551 #endif
3552 EXPORT_SYMBOL(ide_add_setting);
3553 EXPORT_SYMBOL(ide_remove_setting);
3554
3555 EXPORT_SYMBOL(ide_register_hw);
3556 EXPORT_SYMBOL(ide_register);
3557 EXPORT_SYMBOL(ide_unregister);
3558 EXPORT_SYMBOL(ide_setup_ports);
3559 EXPORT_SYMBOL(hwif_unregister);
3560 EXPORT_SYMBOL(get_info_ptr);
3561 EXPORT_SYMBOL(current_capacity);
3562
3563 EXPORT_SYMBOL(system_bus_clock);
3564
3565 /*
3566 * This is gets invoked once during initialization, to set *everything* up
3567 */
3568 int __init ide_init (void)
3569 {
3570 static char banner_printed;
3571 int i;
3572
3573 if (!banner_printed) {
3574 printk(KERN_INFO "Uniform Multi-Platform E-IDE driver " REVISION "\n");
3575 ide_devfs_handle = devfs_mk_dir (NULL, "ide", NULL);
3576 system_bus_speed = ide_system_bus_speed();
3577 banner_printed = 1;
3578 }
3579
3580 init_ide_data ();
3581
3582 initializing = 1;
3583 ide_init_builtin_drivers();
3584 initializing = 0;
3585
3586 for (i = 0; i < MAX_HWIFS; ++i) {
3587 ide_hwif_t *hwif = &ide_hwifs[i];
3588 if (hwif->present)
3589 ide_geninit(hwif);
3590 }
3591
3592 return 0;
3593 }
3594
3595 #ifdef MODULE
3596 char *options = NULL;
3597 MODULE_PARM(options,"s");
3598
3599 static void __init parse_options (char *line)
3600 {
3601 char *next = line;
3602
3603 if (line == NULL || !*line)
3604 return;
3605 while ((line = next) != NULL) {
3606 if ((next = strchr(line,' ')) != NULL)
3607 *next++ = 0;
3608 if (!ide_setup(line))
3609 printk ("Unknown option '%s'\n", line);
3610 }
3611 }
3612
3613 int init_module (void)
3614 {
3615 parse_options(options);
3616 return ide_init();
3617 }
3618
3619 void cleanup_module (void)
3620 {
3621 int index;
3622
3623 for (index = 0; index < MAX_HWIFS; ++index) {
3624 ide_unregister(index);
3625 #if defined(CONFIG_BLK_DEV_IDEDMA) && !defined(CONFIG_DMA_NONPCI)
3626 if (ide_hwifs[index].dma_base)
3627 (void) ide_release_dma(&ide_hwifs[index]);
3628 #endif /* (CONFIG_BLK_DEV_IDEDMA) && !(CONFIG_DMA_NONPCI) */
3629 }
3630
3631 #ifdef CONFIG_PROC_FS
3632 proc_ide_destroy();
3633 #endif
3634 devfs_unregister (ide_devfs_handle);
3635 }
3636
3637 #else /* !MODULE */
3638
3639 __setup("", ide_setup);
3640
3641 #endif /* MODULE */
3642
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