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Merge branch 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux-2.6
[deliverable/linux.git] / drivers / ide / ide.c
CommitLineData
1da177e4
LT		 1/*
2 * linux/drivers/ide/ide.c Version 7.00beta2 Mar 05 2003
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
16 * (usually 14 & 15).
17 * There can be up to two drives per interface, as per the ATA-2 spec.
18 *
1da177e4
LT		 19 * ...
20 *
21 * From hd.c:
22 * |
23 * | It traverses the request-list, using interrupts to jump between functions.
24 * | As nearly all functions can be called within interrupts, we may not sleep.
25 * | Special care is recommended. Have Fun!
26 * |
27 * | modified by Drew Eckhardt to check nr of hd's from the CMOS.
28 * |
29 * | Thanks to Branko Lankester, lankeste@fwi.uva.nl, who found a bug
30 * | in the early extended-partition checks and added DM partitions.
31 * |
32 * | Early work on error handling by Mika Liljeberg (liljeber@cs.Helsinki.FI).
33 * |
34 * | IRQ-unmask, drive-id, multiple-mode, support for ">16 heads",
35 * | and general streamlining by Mark Lord (mlord@pobox.com).
36 *
37 * October, 1994 -- Complete line-by-line overhaul for linux 1.1.x, by:
38 *
39 * Mark Lord (mlord@pobox.com) (IDE Perf.Pkg)
40 * Delman Lee (delman@ieee.org) ("Mr. atdisk2")
41 * Scott Snyder (snyder@fnald0.fnal.gov) (ATAPI IDE cd-rom)
42 *
43 * This was a rewrite of just about everything from hd.c, though some original
44 * code is still sprinkled about. Think of it as a major evolution, with
45 * inspiration from lots of linux users, esp. hamish@zot.apana.org.au
1da177e4
LT		 46 */
47
48#define REVISION "Revision: 7.00alpha2"
49#define VERSION "Id: ide.c 7.00a2 20020906"
50
1da177e4
LT		 51#define _IDE_C /* Tell ide.h it's really us */
52
1da177e4
LT		 53#include <linux/module.h>
54#include <linux/types.h>
55#include <linux/string.h>
56#include <linux/kernel.h>
57#include <linux/timer.h>
58#include <linux/mm.h>
59#include <linux/interrupt.h>
60#include <linux/major.h>
61#include <linux/errno.h>
62#include <linux/genhd.h>
63#include <linux/blkpg.h>
64#include <linux/slab.h>
65#include <linux/init.h>
66#include <linux/pci.h>
67#include <linux/delay.h>
68#include <linux/ide.h>
1da177e4
LT		 69#include <linux/completion.h>
70#include <linux/reboot.h>
71#include <linux/cdrom.h>
72#include <linux/seq_file.h>
73#include <linux/device.h>
74#include <linux/bitops.h>
75
76#include <asm/byteorder.h>
77#include <asm/irq.h>
78#include <asm/uaccess.h>
79#include <asm/io.h>
80
81
82/* default maximum number of failures */
83#define IDE_DEFAULT_MAX_FAILURES 1
84
85static const u8 ide_hwif_to_major[] = { IDE0_MAJOR, IDE1_MAJOR,
86 IDE2_MAJOR, IDE3_MAJOR,
87 IDE4_MAJOR, IDE5_MAJOR,
88 IDE6_MAJOR, IDE7_MAJOR,
89 IDE8_MAJOR, IDE9_MAJOR };
90
91static int idebus_parameter; /* holds the "idebus=" parameter */
92static int system_bus_speed; /* holds what we think is VESA/PCI bus speed */
1da177e4 93
ef29888e 94DEFINE_MUTEX(ide_cfg_mtx);
1da177e4
LT		 95 __cacheline_aligned_in_smp DEFINE_SPINLOCK(ide_lock);
96
6d208b39 97#ifdef CONFIG_IDEPCI_PCIBUS_ORDER
1da177e4
LT		 98static int ide_scan_direction; /* THIS was formerly 2.2.x pci=reverse */
99#endif
100
1da177e4 101int noautodma = 0;
1da177e4
LT		 102
103EXPORT_SYMBOL(noautodma);
104
e3a59b4d
HR		 105#ifdef CONFIG_BLK_DEV_IDEACPI
106int ide_noacpi = 0;
107int ide_noacpitfs = 1;
108int ide_noacpionboot = 1;
109#endif
110
1da177e4
LT		 111/*
112 * This is declared extern in ide.h, for access by other IDE modules:
113 */
114ide_hwif_t ide_hwifs[MAX_HWIFS]; /* master data repository */
115
116EXPORT_SYMBOL(ide_hwifs);
117
1da177e4
LT		 118/*
119 * Do not even *think* about calling this!
120 */
121static void init_hwif_data(ide_hwif_t *hwif, unsigned int index)
122{
123 unsigned int unit;
124
125 /* bulk initialize hwif & drive info with zeros */
126 memset(hwif, 0, sizeof(ide_hwif_t));
127
128 /* fill in any non-zero initial values */
129 hwif->index = index;
130 hwif->major = ide_hwif_to_major[index];
131
132 hwif->name[0] = 'i';
133 hwif->name[1] = 'd';
134 hwif->name[2] = 'e';
135 hwif->name[3] = '0' + index;
136
137 hwif->bus_state = BUSSTATE_ON;
138
139 hwif->atapi_dma = 0; /* disable all atapi dma */
1da177e4 140
f36d4024 141 init_completion(&hwif->gendev_rel_comp);
1da177e4
LT		 142
143 default_hwif_iops(hwif);
144 default_hwif_transport(hwif);
145 for (unit = 0; unit < MAX_DRIVES; ++unit) {
146 ide_drive_t *drive = &hwif->drives[unit];
147
148 drive->media = ide_disk;
149 drive->select.all = (unit<<4)|0xa0;
150 drive->hwif = hwif;
151 drive->ctl = 0x08;
152 drive->ready_stat = READY_STAT;
153 drive->bad_wstat = BAD_W_STAT;
154 drive->special.b.recalibrate = 1;
155 drive->special.b.set_geometry = 1;
156 drive->name[0] = 'h';
157 drive->name[1] = 'd';
158 drive->name[2] = 'a' + (index * MAX_DRIVES) + unit;
159 drive->max_failures = IDE_DEFAULT_MAX_FAILURES;
160 drive->using_dma = 0;
1da177e4
LT		 161 drive->vdma = 0;
162 INIT_LIST_HEAD(&drive->list);
f36d4024 163 init_completion(&drive->gendev_rel_comp);
1da177e4
LT		 164 }
165}
166
167static void init_hwif_default(ide_hwif_t *hwif, unsigned int index)
168{
169 hw_regs_t hw;
170
171 memset(&hw, 0, sizeof(hw_regs_t));
172
173 ide_init_hwif_ports(&hw, ide_default_io_base(index), 0, &hwif->irq);
174
175 memcpy(&hwif->hw, &hw, sizeof(hw));
176 memcpy(hwif->io_ports, hw.io_ports, sizeof(hw.io_ports));
177
178 hwif->noprobe = !hwif->io_ports[IDE_DATA_OFFSET];
179#ifdef CONFIG_BLK_DEV_HD
180 if (hwif->io_ports[IDE_DATA_OFFSET] == HD_DATA)
181 hwif->noprobe = 1; /* may be overridden by ide_setup() */
182#endif
183}
184
185extern void ide_arm_init(void);
186
187/*
188 * init_ide_data() sets reasonable default values into all fields
189 * of all instances of the hwifs and drives, but only on the first call.
190 * Subsequent calls have no effect (they don't wipe out anything).
191 *
192 * This routine is normally called at driver initialization time,
193 * but may also be called MUCH earlier during kernel "command-line"
194 * parameter processing. As such, we cannot depend on any other parts
195 * of the kernel (such as memory allocation) to be functioning yet.
196 *
197 * This is too bad, as otherwise we could dynamically allocate the
198 * ide_drive_t structs as needed, rather than always consuming memory
199 * for the max possible number (MAX_HWIFS * MAX_DRIVES) of them.
200 *
201 * FIXME: We should stuff the setup data into __init and copy the
202 * relevant hwifs/allocate them properly during boot.
203 */
204#define MAGIC_COOKIE 0x12345678
205static void __init init_ide_data (void)
206{
207 ide_hwif_t *hwif;
208 unsigned int index;
209 static unsigned long magic_cookie = MAGIC_COOKIE;
210
211 if (magic_cookie != MAGIC_COOKIE)
212 return; /* already initialized */
213 magic_cookie = 0;
214
215 /* Initialise all interface structures */
216 for (index = 0; index < MAX_HWIFS; ++index) {
217 hwif = &ide_hwifs[index];
218 init_hwif_data(hwif, index);
219 init_hwif_default(hwif, index);
220#if !defined(CONFIG_PPC32) || !defined(CONFIG_PCI)
221 hwif->irq = hwif->hw.irq =
222 ide_init_default_irq(hwif->io_ports[IDE_DATA_OFFSET]);
223#endif
224 }
225#ifdef CONFIG_IDE_ARM
1da177e4 226 ide_arm_init();
1da177e4
LT		 227#endif
228}
229
230/**
231 * ide_system_bus_speed - guess bus speed
232 *
233 * ide_system_bus_speed() returns what we think is the system VESA/PCI
234 * bus speed (in MHz). This is used for calculating interface PIO timings.
235 * The default is 40 for known PCI systems, 50 otherwise.
236 * The "idebus=xx" parameter can be used to override this value.
237 * The actual value to be used is computed/displayed the first time
238 * through. Drivers should only use this as a last resort.
239 *
240 * Returns a guessed speed in MHz.
241 */
242
243static int ide_system_bus_speed(void)
244{
245#ifdef CONFIG_PCI
246 static struct pci_device_id pci_default[] = {
247 { PCI_DEVICE(PCI_ANY_ID, PCI_ANY_ID) },
248 { }
249 };
250#else
251#define pci_default 0
252#endif /* CONFIG_PCI */
253
254 if (!system_bus_speed) {
255 if (idebus_parameter) {
256 /* user supplied value */
257 system_bus_speed = idebus_parameter;
258 } else if (pci_dev_present(pci_default)) {
259 /* safe default value for PCI */
260 system_bus_speed = 33;
261 } else {
262 /* safe default value for VESA and PCI */
263 system_bus_speed = 50;
264 }
265 printk(KERN_INFO "ide: Assuming %dMHz system bus speed "
266 "for PIO modes%s\n", system_bus_speed,
267 idebus_parameter ? "" : "; override with idebus=xx");
268 }
269 return system_bus_speed;
270}
271
1da177e4
LT		 272static struct resource* hwif_request_region(ide_hwif_t *hwif,
273 unsigned long addr, int num)
274{
275 struct resource *res = request_region(addr, num, hwif->name);
276
277 if (!res)
278 printk(KERN_ERR "%s: I/O resource 0x%lX-0x%lX not free.\n",
279 hwif->name, addr, addr+num-1);
280 return res;
281}
282
283/**
284 * ide_hwif_request_regions - request resources for IDE
285 * @hwif: interface to use
286 *
287 * Requests all the needed resources for an interface.
288 * Right now core IDE code does this work which is deeply wrong.
289 * MMIO leaves it to the controller driver,
290 * PIO will migrate this way over time.
291 */
292
293int ide_hwif_request_regions(ide_hwif_t *hwif)
294{
295 unsigned long addr;
296 unsigned int i;
297
2ad1e558 298 if (hwif->mmio)
1da177e4 299 return 0;
1da177e4
LT		 300 addr = hwif->io_ports[IDE_CONTROL_OFFSET];
301 if (addr && !hwif_request_region(hwif, addr, 1))
302 goto control_region_busy;
303 hwif->straight8 = 0;
304 addr = hwif->io_ports[IDE_DATA_OFFSET];
305 if ((addr | 7) == hwif->io_ports[IDE_STATUS_OFFSET]) {
306 if (!hwif_request_region(hwif, addr, 8))
307 goto data_region_busy;
308 hwif->straight8 = 1;
309 return 0;
310 }
311 for (i = IDE_DATA_OFFSET; i <= IDE_STATUS_OFFSET; i++) {
312 addr = hwif->io_ports[i];
313 if (!hwif_request_region(hwif, addr, 1)) {
314 while (--i)
315 release_region(addr, 1);
316 goto data_region_busy;
317 }
318 }
319 return 0;
320
321data_region_busy:
322 addr = hwif->io_ports[IDE_CONTROL_OFFSET];
323 if (addr)
324 release_region(addr, 1);
325control_region_busy:
326 /* If any errors are return, we drop the hwif interface. */
327 return -EBUSY;
328}
329
330/**
331 * ide_hwif_release_regions - free IDE resources
332 *
333 * Note that we only release the standard ports,
334 * and do not even try to handle any extra ports
335 * allocated for weird IDE interface chipsets.
336 *
337 * Note also that we don't yet handle mmio resources here. More
338 * importantly our caller should be doing this so we need to
339 * restructure this as a helper function for drivers.
340 */
341
342void ide_hwif_release_regions(ide_hwif_t *hwif)
343{
344 u32 i = 0;
345
2ad1e558 346 if (hwif->mmio)
1da177e4
LT		 347 return;
348 if (hwif->io_ports[IDE_CONTROL_OFFSET])
349 release_region(hwif->io_ports[IDE_CONTROL_OFFSET], 1);
350 if (hwif->straight8) {
351 release_region(hwif->io_ports[IDE_DATA_OFFSET], 8);
352 return;
353 }
354 for (i = IDE_DATA_OFFSET; i <= IDE_STATUS_OFFSET; i++)
355 if (hwif->io_ports[i])
356 release_region(hwif->io_ports[i], 1);
357}
358
359/**
360 * ide_hwif_restore - restore hwif to template
361 * @hwif: hwif to update
362 * @tmp_hwif: template
363 *
020e322d 364 * Restore hwif to a previous state by copying most settings
1da177e4
LT		 365 * from the template.
366 */
367
368static void ide_hwif_restore(ide_hwif_t *hwif, ide_hwif_t *tmp_hwif)
369{
370 hwif->hwgroup = tmp_hwif->hwgroup;
371
372 hwif->gendev.parent = tmp_hwif->gendev.parent;
373
374 hwif->proc = tmp_hwif->proc;
375
376 hwif->major = tmp_hwif->major;
377 hwif->straight8 = tmp_hwif->straight8;
378 hwif->bus_state = tmp_hwif->bus_state;
379
6a824c92
BZ		 380 hwif->host_flags = tmp_hwif->host_flags;
381
4099d143
BZ		 382 hwif->pio_mask = tmp_hwif->pio_mask;
383
1da177e4
LT		 384 hwif->atapi_dma = tmp_hwif->atapi_dma;
385 hwif->ultra_mask = tmp_hwif->ultra_mask;
386 hwif->mwdma_mask = tmp_hwif->mwdma_mask;
387 hwif->swdma_mask = tmp_hwif->swdma_mask;
388
49521f97
BZ		 389 hwif->cbl = tmp_hwif->cbl;
390
1da177e4
LT		 391 hwif->chipset = tmp_hwif->chipset;
392 hwif->hold = tmp_hwif->hold;
393
394#ifdef CONFIG_BLK_DEV_IDEPCI
395 hwif->pci_dev = tmp_hwif->pci_dev;
396 hwif->cds = tmp_hwif->cds;
397#endif
398
26bcb879 399 hwif->set_pio_mode = tmp_hwif->set_pio_mode;
88b2b32b 400 hwif->set_dma_mode = tmp_hwif->set_dma_mode;
b4e44369 401 hwif->mdma_filter = tmp_hwif->mdma_filter;
2d5eaa6d 402 hwif->udma_filter = tmp_hwif->udma_filter;
1da177e4
LT		 403 hwif->selectproc = tmp_hwif->selectproc;
404 hwif->reset_poll = tmp_hwif->reset_poll;
405 hwif->pre_reset = tmp_hwif->pre_reset;
406 hwif->resetproc = tmp_hwif->resetproc;
407 hwif->intrproc = tmp_hwif->intrproc;
408 hwif->maskproc = tmp_hwif->maskproc;
409 hwif->quirkproc = tmp_hwif->quirkproc;
410 hwif->busproc = tmp_hwif->busproc;
411
412 hwif->ata_input_data = tmp_hwif->ata_input_data;
413 hwif->ata_output_data = tmp_hwif->ata_output_data;
414 hwif->atapi_input_bytes = tmp_hwif->atapi_input_bytes;
415 hwif->atapi_output_bytes = tmp_hwif->atapi_output_bytes;
416
417 hwif->dma_setup = tmp_hwif->dma_setup;
418 hwif->dma_exec_cmd = tmp_hwif->dma_exec_cmd;
419 hwif->dma_start = tmp_hwif->dma_start;
420 hwif->ide_dma_end = tmp_hwif->ide_dma_end;
421 hwif->ide_dma_check = tmp_hwif->ide_dma_check;
422 hwif->ide_dma_on = tmp_hwif->ide_dma_on;
7469aaf6 423 hwif->dma_off_quietly = tmp_hwif->dma_off_quietly;
1da177e4 424 hwif->ide_dma_test_irq = tmp_hwif->ide_dma_test_irq;
f0dd8712 425 hwif->ide_dma_clear_irq = tmp_hwif->ide_dma_clear_irq;
ccf35289 426 hwif->dma_host_on = tmp_hwif->dma_host_on;
7469aaf6 427 hwif->dma_host_off = tmp_hwif->dma_host_off;
841d2a9b 428 hwif->dma_lost_irq = tmp_hwif->dma_lost_irq;
c283f5db 429 hwif->dma_timeout = tmp_hwif->dma_timeout;
1da177e4
LT		 430
431 hwif->OUTB = tmp_hwif->OUTB;
432 hwif->OUTBSYNC = tmp_hwif->OUTBSYNC;
433 hwif->OUTW = tmp_hwif->OUTW;
1da177e4
LT		 434 hwif->OUTSW = tmp_hwif->OUTSW;
435 hwif->OUTSL = tmp_hwif->OUTSL;
436
437 hwif->INB = tmp_hwif->INB;
438 hwif->INW = tmp_hwif->INW;
1da177e4
LT		 439 hwif->INSW = tmp_hwif->INSW;
440 hwif->INSL = tmp_hwif->INSL;
441
442 hwif->sg_max_nents = tmp_hwif->sg_max_nents;
443
444 hwif->mmio = tmp_hwif->mmio;
445 hwif->rqsize = tmp_hwif->rqsize;
446 hwif->no_lba48 = tmp_hwif->no_lba48;
447
448#ifndef CONFIG_BLK_DEV_IDECS
449 hwif->irq = tmp_hwif->irq;
450#endif
451
452 hwif->dma_base = tmp_hwif->dma_base;
453 hwif->dma_master = tmp_hwif->dma_master;
454 hwif->dma_command = tmp_hwif->dma_command;
455 hwif->dma_vendor1 = tmp_hwif->dma_vendor1;
456 hwif->dma_status = tmp_hwif->dma_status;
457 hwif->dma_vendor3 = tmp_hwif->dma_vendor3;
458 hwif->dma_prdtable = tmp_hwif->dma_prdtable;
459
1da177e4
LT		 460 hwif->config_data = tmp_hwif->config_data;
461 hwif->select_data = tmp_hwif->select_data;
020e322d
SS		 462 hwif->extra_base = tmp_hwif->extra_base;
463 hwif->extra_ports = tmp_hwif->extra_ports;
1da177e4 464 hwif->autodma = tmp_hwif->autodma;
1da177e4
LT		 465
466 hwif->hwif_data = tmp_hwif->hwif_data;
467}
468
469/**
020e322d 470 * ide_unregister - free an IDE interface
1da177e4
LT		 471 * @index: index of interface (will change soon to a pointer)
472 *
473 * Perform the final unregister of an IDE interface. At the moment
474 * we don't refcount interfaces so this will also get split up.
475 *
476 * Locking:
477 * The caller must not hold the IDE locks
478 * The drive present/vanishing is not yet properly locked
479 * Take care with the callbacks. These have been split to avoid
480 * deadlocking the IDE layer. The shutdown callback is called
481 * before we take the lock and free resources. It is up to the
482 * caller to be sure there is no pending I/O here, and that
020e322d
SS		 483 * the interface will not be reopened (present/vanishing locking
484 * isn't yet done BTW). After we commit to the final kill we
1da177e4
LT		 485 * call the cleanup callback with the ide locks held.
486 *
487 * Unregister restores the hwif structures to the default state.
488 * This is raving bonkers.
489 */
490
491void ide_unregister(unsigned int index)
492{
493 ide_drive_t *drive;
494 ide_hwif_t *hwif, *g;
ef29888e 495 static ide_hwif_t tmp_hwif; /* protected by ide_cfg_mtx */
1da177e4 496 ide_hwgroup_t *hwgroup;
8604affd 497 int irq_count = 0, unit;
1da177e4
LT		 498
499 BUG_ON(index >= MAX_HWIFS);
500
501 BUG_ON(in_interrupt());
502 BUG_ON(irqs_disabled());
ef29888e 503 mutex_lock(&ide_cfg_mtx);
1da177e4
LT		 504 spin_lock_irq(&ide_lock);
505 hwif = &ide_hwifs[index];
506 if (!hwif->present)
507 goto abort;
508 for (unit = 0; unit < MAX_DRIVES; ++unit) {
509 drive = &hwif->drives[unit];
94f6c59d 510 if (!drive->present)
1da177e4 511 continue;
8604affd
BZ		 512 spin_unlock_irq(&ide_lock);
513 device_unregister(&drive->gendev);
f36d4024 514 wait_for_completion(&drive->gendev_rel_comp);
8604affd 515 spin_lock_irq(&ide_lock);
1da177e4
LT		 516 }
517 hwif->present = 0;
518
519 spin_unlock_irq(&ide_lock);
520
5cbf79cd 521 ide_proc_unregister_port(hwif);
1da177e4
LT		 522
523 hwgroup = hwif->hwgroup;
524 /*
525 * free the irq if we were the only hwif using it
526 */
527 g = hwgroup->hwif;
528 do {
529 if (g->irq == hwif->irq)
530 ++irq_count;
531 g = g->next;
532 } while (g != hwgroup->hwif);
533 if (irq_count == 1)
534 free_irq(hwif->irq, hwgroup);
535
536 spin_lock_irq(&ide_lock);
537 /*
538 * Note that we only release the standard ports,
539 * and do not even try to handle any extra ports
540 * allocated for weird IDE interface chipsets.
541 */
542 ide_hwif_release_regions(hwif);
543
544 /*
545 * Remove us from the hwgroup, and free
546 * the hwgroup if we were the only member
547 */
1da177e4
LT		 548 if (hwif->next == hwif) {
549 BUG_ON(hwgroup->hwif != hwif);
550 kfree(hwgroup);
551 } else {
552 /* There is another interface in hwgroup.
553 * Unlink us, and set hwgroup->drive and ->hwif to
554 * something sane.
555 */
556 g = hwgroup->hwif;
557 while (g->next != hwif)
558 g = g->next;
559 g->next = hwif->next;
560 if (hwgroup->hwif == hwif) {
561 /* Chose a random hwif for hwgroup->hwif.
562 * It's guaranteed that there are no drives
563 * left in the hwgroup.
564 */
565 BUG_ON(hwgroup->drive != NULL);
566 hwgroup->hwif = g;
567 }
568 BUG_ON(hwgroup->hwif == hwif);
569 }
570
571 /* More messed up locking ... */
572 spin_unlock_irq(&ide_lock);
573 device_unregister(&hwif->gendev);
f36d4024 574 wait_for_completion(&hwif->gendev_rel_comp);
1da177e4
LT		 575
576 /*
577 * Remove us from the kernel's knowledge
578 */
579 blk_unregister_region(MKDEV(hwif->major, 0), MAX_DRIVES<<PARTN_BITS);
580 kfree(hwif->sg_table);
581 unregister_blkdev(hwif->major, hwif->name);
582 spin_lock_irq(&ide_lock);
583
584 if (hwif->dma_base) {
585 (void) ide_release_dma(hwif);
586
587 hwif->dma_base = 0;
588 hwif->dma_master = 0;
589 hwif->dma_command = 0;
590 hwif->dma_vendor1 = 0;
591 hwif->dma_status = 0;
592 hwif->dma_vendor3 = 0;
593 hwif->dma_prdtable = 0;
020e322d
SS		 594
595 hwif->extra_base = 0;
596 hwif->extra_ports = 0;
1da177e4
LT		 597 }
598
599 /* copy original settings */
600 tmp_hwif = *hwif;
601
602 /* restore hwif data to pristine status */
603 init_hwif_data(hwif, index);
604 init_hwif_default(hwif, index);
605
606 ide_hwif_restore(hwif, &tmp_hwif);
607
608abort:
609 spin_unlock_irq(&ide_lock);
ef29888e 610 mutex_unlock(&ide_cfg_mtx);
1da177e4
LT		 611}
612
613EXPORT_SYMBOL(ide_unregister);
614
615
616/**
617 * ide_setup_ports - set up IDE interface ports
618 * @hw: register descriptions
619 * @base: base register
620 * @offsets: table of register offsets
621 * @ctrl: control register
622 * @ack_irq: IRQ ack
623 * @irq: interrupt lie
624 *
625 * Setup hw_regs_t structure described by parameters. You
626 * may set up the hw structure yourself OR use this routine to
627 * do it for you. This is basically a helper
628 *
629 */
630
631void ide_setup_ports ( hw_regs_t *hw,
632 unsigned long base, int *offsets,
633 unsigned long ctrl, unsigned long intr,
634 ide_ack_intr_t *ack_intr,
635/*
636 * ide_io_ops_t *iops,
637 */
638 int irq)
639{
640 int i;
641
2c3e0262 642 memset(hw, 0, sizeof(hw_regs_t));
1da177e4
LT		 643 for (i = 0; i < IDE_NR_PORTS; i++) {
644 if (offsets[i] == -1) {
645 switch(i) {
646 case IDE_CONTROL_OFFSET:
647 hw->io_ports[i] = ctrl;
648 break;
649#if defined(CONFIG_AMIGA) || defined(CONFIG_MAC)
650 case IDE_IRQ_OFFSET:
651 hw->io_ports[i] = intr;
652 break;
653#endif /* (CONFIG_AMIGA) || (CONFIG_MAC) */
654 default:
655 hw->io_ports[i] = 0;
656 break;
657 }
658 } else {
659 hw->io_ports[i] = base + offsets[i];
660 }
661 }
662 hw->irq = irq;
663 hw->dma = NO_DMA;
664 hw->ack_intr = ack_intr;
665/*
666 * hw->iops = iops;
667 */
668}
669
670/**
671 * ide_register_hw_with_fixup - register IDE interface
672 * @hw: hardware registers
869c56ee 673 * @initializing: set while initializing built-in drivers
1da177e4
LT		 674 * @hwifp: pointer to returned hwif
675 * @fixup: fixup function
676 *
677 * Register an IDE interface, specifying exactly the registers etc.
678 * Set init=1 iff calling before probes have taken place.
679 *
680 * Returns -1 on error.
681 */
682
869c56ee
BZ		 683int ide_register_hw_with_fixup(hw_regs_t *hw, int initializing,
684 ide_hwif_t **hwifp,
685 void(*fixup)(ide_hwif_t *hwif))
1da177e4
LT		 686{
687 int index, retry = 1;
688 ide_hwif_t *hwif;
689
690 do {
691 for (index = 0; index < MAX_HWIFS; ++index) {
692 hwif = &ide_hwifs[index];
693 if (hwif->hw.io_ports[IDE_DATA_OFFSET] == hw->io_ports[IDE_DATA_OFFSET])
694 goto found;
695 }
696 for (index = 0; index < MAX_HWIFS; ++index) {
697 hwif = &ide_hwifs[index];
698 if (hwif->hold)
699 continue;
700 if ((!hwif->present && !hwif->mate && !initializing) ||
701 (!hwif->hw.io_ports[IDE_DATA_OFFSET] && initializing))
702 goto found;
703 }
704 for (index = 0; index < MAX_HWIFS; index++)
705 ide_unregister(index);
706 } while (retry--);
707 return -1;
708found:
709 if (hwif->present)
710 ide_unregister(index);
711 else if (!hwif->hold) {
712 init_hwif_data(hwif, index);
713 init_hwif_default(hwif, index);
714 }
715 if (hwif->present)
716 return -1;
717 memcpy(&hwif->hw, hw, sizeof(*hw));
718 memcpy(hwif->io_ports, hwif->hw.io_ports, sizeof(hwif->hw.io_ports));
719 hwif->irq = hw->irq;
720 hwif->noprobe = 0;
721 hwif->chipset = hw->chipset;
4349d5cd 722 hwif->gendev.parent = hw->dev;
1da177e4
LT		 723
724 if (!initializing) {
725 probe_hwif_init_with_fixup(hwif, fixup);
5cbf79cd 726 ide_proc_register_port(hwif);
1da177e4
LT		 727 }
728
729 if (hwifp)
730 *hwifp = hwif;
731
732 return (initializing || hwif->present) ? index : -1;
733}
734
735EXPORT_SYMBOL(ide_register_hw_with_fixup);
736
869c56ee 737int ide_register_hw(hw_regs_t *hw, int initializing, ide_hwif_t **hwifp)
1da177e4 738{
869c56ee 739 return ide_register_hw_with_fixup(hw, initializing, hwifp, NULL);
1da177e4
LT		 740}
741
742EXPORT_SYMBOL(ide_register_hw);
743
744/*
745 * Locks for IDE setting functionality
746 */
747
f9383c42 748DEFINE_MUTEX(ide_setting_mtx);
1da177e4 749
f9383c42 750EXPORT_SYMBOL_GPL(ide_setting_mtx);
1497943e 751
1da177e4
LT		 752/**
753 * ide_spin_wait_hwgroup - wait for group
754 * @drive: drive in the group
755 *
756 * Wait for an IDE device group to go non busy and then return
757 * holding the ide_lock which guards the hwgroup->busy status
758 * and right to use it.
759 */
760
761int ide_spin_wait_hwgroup (ide_drive_t *drive)
762{
763 ide_hwgroup_t *hwgroup = HWGROUP(drive);
764 unsigned long timeout = jiffies + (3 * HZ);
765
766 spin_lock_irq(&ide_lock);
767
768 while (hwgroup->busy) {
769 unsigned long lflags;
770 spin_unlock_irq(&ide_lock);
771 local_irq_set(lflags);
772 if (time_after(jiffies, timeout)) {
773 local_irq_restore(lflags);
774 printk(KERN_ERR "%s: channel busy\n", drive->name);
775 return -EBUSY;
776 }
777 local_irq_restore(lflags);
778 spin_lock_irq(&ide_lock);
779 }
780 return 0;
781}
782
783EXPORT_SYMBOL(ide_spin_wait_hwgroup);
784
7662d046 785int set_io_32bit(ide_drive_t *drive, int arg)
1da177e4 786{
1497943e
BZ		 787 if (drive->no_io_32bit)
788 return -EPERM;
789
790 if (arg < 0 || arg > 1 + (SUPPORT_VLB_SYNC << 1))
791 return -EINVAL;
792
1da177e4
LT		 793 drive->io_32bit = arg;
794#ifdef CONFIG_BLK_DEV_DTC2278
795 if (HWIF(drive)->chipset == ide_dtc2278)
796 HWIF(drive)->drives[!drive->select.b.unit].io_32bit = arg;
797#endif /* CONFIG_BLK_DEV_DTC2278 */
798 return 0;
799}
800
1497943e
BZ		 801static int set_ksettings(ide_drive_t *drive, int arg)
802{
803 if (arg < 0 || arg > 1)
804 return -EINVAL;
805
806 if (ide_spin_wait_hwgroup(drive))
807 return -EBUSY;
808 drive->keep_settings = arg;
809 spin_unlock_irq(&ide_lock);
810
811 return 0;
812}
813
7662d046 814int set_using_dma(ide_drive_t *drive, int arg)
1da177e4
LT		 815{
816#ifdef CONFIG_BLK_DEV_IDEDMA
87996204
BZ		 817 ide_hwif_t *hwif = drive->hwif;
818 int err = -EPERM;
819
1497943e
BZ		 820 if (arg < 0 || arg > 1)
821 return -EINVAL;
822
1da177e4 823 if (!drive->id || !(drive->id->capability & 1))
87996204
BZ		 824 goto out;
825
826 if (hwif->ide_dma_check == NULL)
827 goto out;
828
829 err = -EBUSY;
830 if (ide_spin_wait_hwgroup(drive))
831 goto out;
832 /*
833 * set ->busy flag, unlock and let it ride
834 */
835 hwif->hwgroup->busy = 1;
836 spin_unlock_irq(&ide_lock);
837
838 err = 0;
839
1da177e4 840 if (arg) {
793a9722 841 hwif->dma_off_quietly(drive);
87996204
BZ		 842 if (ide_set_dma(drive) || hwif->ide_dma_on(drive))
843 err = -EIO;
7469aaf6
BZ		 844 } else
845 ide_dma_off(drive);
87996204
BZ		 846
847 /*
848 * lock, clear ->busy flag and unlock before leaving
849 */
850 spin_lock_irq(&ide_lock);
851 hwif->hwgroup->busy = 0;
852 spin_unlock_irq(&ide_lock);
853out:
854 return err;
1da177e4 855#else
1497943e
BZ		 856 if (arg < 0 || arg > 1)
857 return -EINVAL;
858
1da177e4
LT		 859 return -EPERM;
860#endif
861}
862
7662d046 863int set_pio_mode(ide_drive_t *drive, int arg)
1da177e4
LT		 864{
865 struct request rq;
866
1497943e
BZ		 867 if (arg < 0 || arg > 255)
868 return -EINVAL;
869
26bcb879 870 if (drive->hwif->set_pio_mode == NULL)
1da177e4 871 return -ENOSYS;
26bcb879 872
1da177e4
LT		 873 if (drive->special.b.set_tune)
874 return -EBUSY;
875 ide_init_drive_cmd(&rq);
876 drive->tune_req = (u8) arg;
877 drive->special.b.set_tune = 1;
878 (void) ide_do_drive_cmd(drive, &rq, ide_wait);
879 return 0;
880}
881
1497943e
BZ		 882static int set_unmaskirq(ide_drive_t *drive, int arg)
883{
884 if (drive->no_unmask)
885 return -EPERM;
886
887 if (arg < 0 || arg > 1)
888 return -EINVAL;
889
890 if (ide_spin_wait_hwgroup(drive))
891 return -EBUSY;
892 drive->unmask = arg;
893 spin_unlock_irq(&ide_lock);
894
895 return 0;
896}
897
1da177e4
LT		 898/**
899 * system_bus_clock - clock guess
900 *
901 * External version of the bus clock guess used by very old IDE drivers
902 * for things like VLB timings. Should not be used.
903 */
904
905int system_bus_clock (void)
906{
907 return((int) ((!system_bus_speed) ? ide_system_bus_speed() : system_bus_speed ));
908}
909
910EXPORT_SYMBOL(system_bus_clock);
911
b887d2e6 912static int generic_ide_suspend(struct device *dev, pm_message_t mesg)
1da177e4
LT		 913{
914 ide_drive_t *drive = dev->driver_data;
e3a59b4d 915 ide_hwif_t *hwif = HWIF(drive);
1da177e4
LT		 916 struct request rq;
917 struct request_pm_state rqpm;
918 ide_task_t args;
5e32132b 919 int ret;
1da177e4 920
e3a59b4d
HR		 921 /* Call ACPI _GTM only once */
922 if (!(drive->dn % 2))
923 ide_acpi_get_timing(hwif);
924
1da177e4
LT		 925 memset(&rq, 0, sizeof(rq));
926 memset(&rqpm, 0, sizeof(rqpm));
927 memset(&args, 0, sizeof(args));
4aff5e23 928 rq.cmd_type = REQ_TYPE_PM_SUSPEND;
1da177e4 929 rq.special = &args;
c00895ab 930 rq.data = &rqpm;
1da177e4 931 rqpm.pm_step = ide_pm_state_start_suspend;
b887d2e6
DB		 932 if (mesg.event == PM_EVENT_PRETHAW)
933 mesg.event = PM_EVENT_FREEZE;
934 rqpm.pm_state = mesg.event;
1da177e4 935
5e32132b
SL		 936 ret = ide_do_drive_cmd(drive, &rq, ide_wait);
937 /* only call ACPI _PS3 after both drivers are suspended */
938 if (!ret && (((drive->dn % 2) && hwif->drives[0].present
939 && hwif->drives[1].present)
940 || !hwif->drives[0].present
941 || !hwif->drives[1].present))
942 ide_acpi_set_state(hwif, 0);
943 return ret;
1da177e4
LT		 944}
945
946static int generic_ide_resume(struct device *dev)
947{
948 ide_drive_t *drive = dev->driver_data;
e3a59b4d 949 ide_hwif_t *hwif = HWIF(drive);
1da177e4
LT		 950 struct request rq;
951 struct request_pm_state rqpm;
952 ide_task_t args;
0d2157f7 953 int err;
1da177e4 954
e3a59b4d 955 /* Call ACPI _STM only once */
5e32132b
SL		 956 if (!(drive->dn % 2)) {
957 ide_acpi_set_state(hwif, 1);
e3a59b4d 958 ide_acpi_push_timing(hwif);
5e32132b 959 }
e3a59b4d
HR		 960
961 ide_acpi_exec_tfs(drive);
962
1da177e4
LT		 963 memset(&rq, 0, sizeof(rq));
964 memset(&rqpm, 0, sizeof(rqpm));
965 memset(&args, 0, sizeof(args));
4aff5e23 966 rq.cmd_type = REQ_TYPE_PM_RESUME;
1da177e4 967 rq.special = &args;
c00895ab 968 rq.data = &rqpm;
1da177e4 969 rqpm.pm_step = ide_pm_state_start_resume;
ca078bae 970 rqpm.pm_state = PM_EVENT_ON;
1da177e4 971
0d2157f7
LT		 972 err = ide_do_drive_cmd(drive, &rq, ide_head_wait);
973
ce9b2b0a
RW		 974 if (err == 0 && dev->driver) {
975 ide_driver_t *drv = to_ide_driver(dev->driver);
976
977 if (drv->resume)
978 drv->resume(drive);
979 }
0d2157f7
LT		 980
981 return err;
1da177e4
LT		 982}
983
984int generic_ide_ioctl(ide_drive_t *drive, struct file *file, struct block_device *bdev,
985 unsigned int cmd, unsigned long arg)
986{
1497943e 987 unsigned long flags;
1da177e4 988 ide_driver_t *drv;
1da177e4 989 void __user *p = (void __user *)arg;
1985026d 990 int err = 0, (*setfunc)(ide_drive_t *, int);
1497943e 991 u8 *val;
1da177e4 992
1497943e
BZ		 993 switch (cmd) {
994 case HDIO_GET_32BIT: val = &drive->io_32bit; goto read_val;
995 case HDIO_GET_KEEPSETTINGS: val = &drive->keep_settings; goto read_val;
996 case HDIO_GET_UNMASKINTR: val = &drive->unmask; goto read_val;
997 case HDIO_GET_DMA: val = &drive->using_dma; goto read_val;
998 case HDIO_SET_32BIT: setfunc = set_io_32bit; goto set_val;
999 case HDIO_SET_KEEPSETTINGS: setfunc = set_ksettings; goto set_val;
1000 case HDIO_SET_PIO_MODE: setfunc = set_pio_mode; goto set_val;
1001 case HDIO_SET_UNMASKINTR: setfunc = set_unmaskirq; goto set_val;
1002 case HDIO_SET_DMA: setfunc = set_using_dma; goto set_val;
1da177e4 1003 }
1da177e4
LT		 1004
1005 switch (cmd) {
1da177e4
LT		 1006 case HDIO_OBSOLETE_IDENTITY:
1007 case HDIO_GET_IDENTITY:
1008 if (bdev != bdev->bd_contains)
1009 return -EINVAL;
1010 if (drive->id_read == 0)
1011 return -ENOMSG;
1012 if (copy_to_user(p, drive->id, (cmd == HDIO_GET_IDENTITY) ? sizeof(*drive->id) : 142))
1013 return -EFAULT;
1014 return 0;
1015
1016 case HDIO_GET_NICE:
1017 return put_user(drive->dsc_overlap << IDE_NICE_DSC_OVERLAP |
1018 drive->atapi_overlap << IDE_NICE_ATAPI_OVERLAP |
1019 drive->nice0 << IDE_NICE_0 |
1020 drive->nice1 << IDE_NICE_1 |
1021 drive->nice2 << IDE_NICE_2,
1022 (long __user *) arg);
1023
1024#ifdef CONFIG_IDE_TASK_IOCTL
1025 case HDIO_DRIVE_TASKFILE:
1026 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
1027 return -EACCES;
1028 switch(drive->media) {
1029 case ide_disk:
1030 return ide_taskfile_ioctl(drive, cmd, arg);
1031 default:
1032 return -ENOMSG;
1033 }
1034#endif /* CONFIG_IDE_TASK_IOCTL */
1035
1036 case HDIO_DRIVE_CMD:
1037 if (!capable(CAP_SYS_RAWIO))
1038 return -EACCES;
1039 return ide_cmd_ioctl(drive, cmd, arg);
1040
1041 case HDIO_DRIVE_TASK:
1042 if (!capable(CAP_SYS_RAWIO))
1043 return -EACCES;
1044 return ide_task_ioctl(drive, cmd, arg);
1045
1046 case HDIO_SCAN_HWIF:
1047 {
1048 hw_regs_t hw;
1049 int args[3];
1050 if (!capable(CAP_SYS_RAWIO)) return -EACCES;
1051 if (copy_from_user(args, p, 3 * sizeof(int)))
1052 return -EFAULT;
1053 memset(&hw, 0, sizeof(hw));
1054 ide_init_hwif_ports(&hw, (unsigned long) args[0],
1055 (unsigned long) args[1], NULL);
1056 hw.irq = args[2];
869c56ee 1057 if (ide_register_hw(&hw, 0, NULL) == -1)
1da177e4
LT		 1058 return -EIO;
1059 return 0;
1060 }
1061 case HDIO_UNREGISTER_HWIF:
1062 if (!capable(CAP_SYS_RAWIO)) return -EACCES;
1063 /* (arg > MAX_HWIFS) checked in function */
1064 ide_unregister(arg);
1065 return 0;
1066 case HDIO_SET_NICE:
1067 if (!capable(CAP_SYS_ADMIN)) return -EACCES;
1068 if (arg != (arg & ((1 << IDE_NICE_DSC_OVERLAP) | (1 << IDE_NICE_1))))
1069 return -EPERM;
1070 drive->dsc_overlap = (arg >> IDE_NICE_DSC_OVERLAP) & 1;
1071 drv = *(ide_driver_t **)bdev->bd_disk->private_data;
1072 if (drive->dsc_overlap && !drv->supports_dsc_overlap) {
1073 drive->dsc_overlap = 0;
1074 return -EPERM;
1075 }
1076 drive->nice1 = (arg >> IDE_NICE_1) & 1;
1077 return 0;
1078 case HDIO_DRIVE_RESET:
1079 {
1080 unsigned long flags;
1081 if (!capable(CAP_SYS_ADMIN)) return -EACCES;
1082
1083 /*
1084 * Abort the current command on the
1085 * group if there is one, taking
1086 * care not to allow anything else
1087 * to be queued and to die on the
1088 * spot if we miss one somehow
1089 */
1090
1091 spin_lock_irqsave(&ide_lock, flags);
1092
913759ac
AC		 1093 if (HWGROUP(drive)->resetting) {
1094 spin_unlock_irqrestore(&ide_lock, flags);
1095 return -EBUSY;
1096 }
1097
1da177e4
LT		 1098 ide_abort(drive, "drive reset");
1099
125e1874 1100 BUG_ON(HWGROUP(drive)->handler);
1da177e4
LT		 1101
1102 /* Ensure nothing gets queued after we
1103 drop the lock. Reset will clear the busy */
1104
1105 HWGROUP(drive)->busy = 1;
1106 spin_unlock_irqrestore(&ide_lock, flags);
1107 (void) ide_do_reset(drive);
1108
1109 return 0;
1110 }
1111
1da177e4
LT		 1112 case HDIO_GET_BUSSTATE:
1113 if (!capable(CAP_SYS_ADMIN))
1114 return -EACCES;
1115 if (put_user(HWIF(drive)->bus_state, (long __user *)arg))
1116 return -EFAULT;
1117 return 0;
1118
1119 case HDIO_SET_BUSSTATE:
1120 if (!capable(CAP_SYS_ADMIN))
1121 return -EACCES;
1122 if (HWIF(drive)->busproc)
1123 return HWIF(drive)->busproc(drive, (int)arg);
1124 return -EOPNOTSUPP;
1125 default:
1126 return -EINVAL;
1127 }
1497943e
BZ		 1128
1129read_val:
f9383c42 1130 mutex_lock(&ide_setting_mtx);
1497943e
BZ		 1131 spin_lock_irqsave(&ide_lock, flags);
1132 err = *val;
1133 spin_unlock_irqrestore(&ide_lock, flags);
f9383c42 1134 mutex_unlock(&ide_setting_mtx);
1497943e
BZ		 1135 return err >= 0 ? put_user(err, (long __user *)arg) : err;
1136
1137set_val:
1138 if (bdev != bdev->bd_contains)
1139 err = -EINVAL;
1140 else {
1141 if (!capable(CAP_SYS_ADMIN))
1142 err = -EACCES;
1143 else {
f9383c42 1144 mutex_lock(&ide_setting_mtx);
1497943e 1145 err = setfunc(drive, arg);
f9383c42 1146 mutex_unlock(&ide_setting_mtx);
1497943e
BZ		 1147 }
1148 }
1149 return err;
1da177e4
LT		 1150}
1151
1152EXPORT_SYMBOL(generic_ide_ioctl);
1153
1154/*
1155 * stridx() returns the offset of c within s,
1156 * or -1 if c is '\0' or not found within s.
1157 */
1158static int __init stridx (const char *s, char c)
1159{
1160 char *i = strchr(s, c);
1161 return (i && c) ? i - s : -1;
1162}
1163
1164/*
1165 * match_parm() does parsing for ide_setup():
1166 *
1167 * 1. the first char of s must be '='.
1168 * 2. if the remainder matches one of the supplied keywords,
1169 * the index (1 based) of the keyword is negated and returned.
1170 * 3. if the remainder is a series of no more than max_vals numbers
1171 * separated by commas, the numbers are saved in vals[] and a
1172 * count of how many were saved is returned. Base10 is assumed,
1173 * and base16 is allowed when prefixed with "0x".
1174 * 4. otherwise, zero is returned.
1175 */
1176static int __init match_parm (char *s, const char *keywords[], int vals[], int max_vals)
1177{
1178 static const char *decimal = "0123456789";
1179 static const char *hex = "0123456789abcdef";
1180 int i, n;
1181
1182 if (*s++ == '=') {
1183 /*
1184 * Try matching against the supplied keywords,
1185 * and return -(index+1) if we match one
1186 */
1187 if (keywords != NULL) {
1188 for (i = 0; *keywords != NULL; ++i) {
1189 if (!strcmp(s, *keywords++))
1190 return -(i+1);
1191 }
1192 }
1193 /*
1194 * Look for a series of no more than "max_vals"
1195 * numeric values separated by commas, in base10,
1196 * or base16 when prefixed with "0x".
1197 * Return a count of how many were found.
1198 */
1199 for (n = 0; (i = stridx(decimal, *s)) >= 0;) {
1200 vals[n] = i;
1201 while ((i = stridx(decimal, *++s)) >= 0)
1202 vals[n] = (vals[n] * 10) + i;
1203 if (*s == 'x' && !vals[n]) {
1204 while ((i = stridx(hex, *++s)) >= 0)
1205 vals[n] = (vals[n] * 0x10) + i;
1206 }
1207 if (++n == max_vals)
1208 break;
1209 if (*s == ',' || *s == ';')
1210 ++s;
1211 }
1212 if (!*s)
1213 return n;
1214 }
1215 return 0; /* zero = nothing matched */
1216}
1217
1218#ifdef CONFIG_BLK_DEV_ALI14XX
84913882 1219extern int probe_ali14xx;
1da177e4
LT		 1220extern int ali14xx_init(void);
1221#endif
1222#ifdef CONFIG_BLK_DEV_UMC8672
84913882 1223extern int probe_umc8672;
1da177e4
LT		 1224extern int umc8672_init(void);
1225#endif
1226#ifdef CONFIG_BLK_DEV_DTC2278
84913882 1227extern int probe_dtc2278;
1da177e4
LT		 1228extern int dtc2278_init(void);
1229#endif
1230#ifdef CONFIG_BLK_DEV_HT6560B
84913882 1231extern int probe_ht6560b;
1da177e4
LT		 1232extern int ht6560b_init(void);
1233#endif
1234#ifdef CONFIG_BLK_DEV_QD65XX
84913882 1235extern int probe_qd65xx;
1da177e4
LT		 1236extern int qd65xx_init(void);
1237#endif
1238
1239static int __initdata is_chipset_set[MAX_HWIFS];
1240
1241/*
1242 * ide_setup() gets called VERY EARLY during initialization,
1243 * to handle kernel "command line" strings beginning with "hdx=" or "ide".
1244 *
1245 * Remember to update Documentation/ide.txt if you change something here.
1246 */
1247static int __init ide_setup(char *s)
1248{
1249 int i, vals[3];
1250 ide_hwif_t *hwif;
1251 ide_drive_t *drive;
1252 unsigned int hw, unit;
1253 const char max_drive = 'a' + ((MAX_HWIFS * MAX_DRIVES) - 1);
1254 const char max_hwif = '0' + (MAX_HWIFS - 1);
1255
1256
1257 if (strncmp(s,"hd",2) == 0 && s[2] == '=') /* hd= is for hd.c */
1258 return 0; /* driver and not us */
1259
1260 if (strncmp(s,"ide",3) && strncmp(s,"idebus",6) && strncmp(s,"hd",2))
1261 return 0;
1262
1263 printk(KERN_INFO "ide_setup: %s", s);
1264 init_ide_data ();
1265
1266#ifdef CONFIG_BLK_DEV_IDEDOUBLER
1267 if (!strcmp(s, "ide=doubler")) {
1268 extern int ide_doubler;
1269
1270 printk(" : Enabled support for IDE doublers\n");
1271 ide_doubler = 1;
1272 return 1;
1273 }
1274#endif /* CONFIG_BLK_DEV_IDEDOUBLER */
1275
1276 if (!strcmp(s, "ide=nodma")) {
1277 printk(" : Prevented DMA\n");
1278 noautodma = 1;
1279 return 1;
1280 }
1281
6d208b39 1282#ifdef CONFIG_IDEPCI_PCIBUS_ORDER
1da177e4
LT		 1283 if (!strcmp(s, "ide=reverse")) {
1284 ide_scan_direction = 1;
1285 printk(" : Enabled support for IDE inverse scan order.\n");
1286 return 1;
1287 }
6d208b39 1288#endif
1da177e4 1289
e3a59b4d
HR		 1290#ifdef CONFIG_BLK_DEV_IDEACPI
1291 if (!strcmp(s, "ide=noacpi")) {
1292 //printk(" : Disable IDE ACPI support.\n");
1293 ide_noacpi = 1;
1294 return 1;
1295 }
1296 if (!strcmp(s, "ide=acpigtf")) {
1297 //printk(" : Enable IDE ACPI _GTF support.\n");
1298 ide_noacpitfs = 0;
1299 return 1;
1300 }
1301 if (!strcmp(s, "ide=acpionboot")) {
1302 //printk(" : Call IDE ACPI methods on boot.\n");
1303 ide_noacpionboot = 0;
1304 return 1;
1305 }
1306#endif /* CONFIG_BLK_DEV_IDEACPI */
1307
1da177e4
LT		 1308 /*
1309 * Look for drive options: "hdx="
1310 */
1311 if (s[0] == 'h' && s[1] == 'd' && s[2] >= 'a' && s[2] <= max_drive) {
1312 const char *hd_words[] = {
b6209a90 1313 "none", "noprobe", "nowerr", "cdrom", "minus5",
1da177e4 1314 "autotune", "noautotune", "minus8", "swapdata", "bswap",
36193484 1315 "noflush", "remap", "remap63", "scsi", NULL };
1da177e4
LT		 1316 unit = s[2] - 'a';
1317 hw = unit / MAX_DRIVES;
1318 unit = unit % MAX_DRIVES;
1319 hwif = &ide_hwifs[hw];
1320 drive = &hwif->drives[unit];
1321 if (strncmp(s + 4, "ide-", 4) == 0) {
1322 strlcpy(drive->driver_req, s + 4, sizeof(drive->driver_req));
1323 goto done;
1324 }
1325 switch (match_parm(&s[3], hd_words, vals, 3)) {
1326 case -1: /* "none" */
1327 case -2: /* "noprobe" */
1328 drive->noprobe = 1;
1329 goto done;
1330 case -3: /* "nowerr" */
1331 drive->bad_wstat = BAD_R_STAT;
1332 hwif->noprobe = 0;
1333 goto done;
1334 case -4: /* "cdrom" */
1335 drive->present = 1;
1336 drive->media = ide_cdrom;
1337 /* an ATAPI device ignores DRDY */
1338 drive->ready_stat = 0;
1339 hwif->noprobe = 0;
1340 goto done;
1da177e4
LT		 1341 case -6: /* "autotune" */
1342 drive->autotune = IDE_TUNE_AUTO;
1343 goto obsolete_option;
1344 case -7: /* "noautotune" */
1345 drive->autotune = IDE_TUNE_NOAUTO;
1346 goto obsolete_option;
1347 case -9: /* "swapdata" */
1348 case -10: /* "bswap" */
1349 drive->bswap = 1;
1350 goto done;
36193484
JA		 1351 case -11: /* noflush */
1352 drive->noflush = 1;
1353 goto done;
1da177e4
LT		 1354 case -12: /* "remap" */
1355 drive->remap_0_to_1 = 1;
1356 goto done;
1357 case -13: /* "remap63" */
1358 drive->sect0 = 63;
1359 goto done;
1360 case -14: /* "scsi" */
1361 drive->scsi = 1;
1362 goto done;
1363 case 3: /* cyl,head,sect */
1364 drive->media = ide_disk;
1365 drive->ready_stat = READY_STAT;
1366 drive->cyl = drive->bios_cyl = vals[0];
1367 drive->head = drive->bios_head = vals[1];
1368 drive->sect = drive->bios_sect = vals[2];
1369 drive->present = 1;
1370 drive->forced_geom = 1;
1371 hwif->noprobe = 0;
1372 goto done;
1373 default:
1374 goto bad_option;
1375 }
1376 }
1377
1378 if (s[0] != 'i' || s[1] != 'd' || s[2] != 'e')
1379 goto bad_option;
1380 /*
1381 * Look for bus speed option: "idebus="
1382 */
1383 if (s[3] == 'b' && s[4] == 'u' && s[5] == 's') {
1384 if (match_parm(&s[6], NULL, vals, 1) != 1)
1385 goto bad_option;
1386 if (vals[0] >= 20 && vals[0] <= 66) {
1387 idebus_parameter = vals[0];
1388 } else
1389 printk(" -- BAD BUS SPEED! Expected value from 20 to 66");
1390 goto done;
1391 }
1392 /*
1393 * Look for interface options: "idex="
1394 */
1395 if (s[3] >= '0' && s[3] <= max_hwif) {
1396 /*
1397 * Be VERY CAREFUL changing this: note hardcoded indexes below
1398 * (-8, -9, -10) are reserved to ease the hardcoding.
1399 */
1400 static const char *ide_words[] = {
b6209a90 1401 "noprobe", "serialize", "minus3", "minus4",
1da177e4
LT		 1402 "reset", "dma", "ata66", "minus8", "minus9",
1403 "minus10", "four", "qd65xx", "ht6560b", "cmd640_vlb",
1404 "dtc2278", "umc8672", "ali14xx", NULL };
1405 hw = s[3] - '0';
1406 hwif = &ide_hwifs[hw];
1407 i = match_parm(&s[4], ide_words, vals, 3);
1408
1409 /*
1410 * Cryptic check to ensure chipset not already set for hwif.
1411 * Note: we can't depend on hwif->chipset here.
1412 */
1413 if ((i >= -18 && i <= -11) || (i > 0 && i <= 3)) {
1414 /* chipset already specified */
1415 if (is_chipset_set[hw])
1416 goto bad_option;
1417 if (i > -18 && i <= -11) {
1418 /* these drivers are for "ide0=" only */
1419 if (hw != 0)
1420 goto bad_hwif;
1421 /* chipset already specified for 2nd port */
1422 if (is_chipset_set[hw+1])
1423 goto bad_option;
1424 }
1425 is_chipset_set[hw] = 1;
1426 printk("\n");
1427 }
1428
1429 switch (i) {
1430#ifdef CONFIG_BLK_DEV_ALI14XX
1431 case -17: /* "ali14xx" */
1432 probe_ali14xx = 1;
1433 goto done;
1434#endif
1435#ifdef CONFIG_BLK_DEV_UMC8672
1436 case -16: /* "umc8672" */
1437 probe_umc8672 = 1;
1438 goto done;
1439#endif
1440#ifdef CONFIG_BLK_DEV_DTC2278
1441 case -15: /* "dtc2278" */
1442 probe_dtc2278 = 1;
1443 goto done;
1444#endif
1445#ifdef CONFIG_BLK_DEV_CMD640
1446 case -14: /* "cmd640_vlb" */
1447 {
1448 extern int cmd640_vlb; /* flag for cmd640.c */
1449 cmd640_vlb = 1;
1450 goto done;
1451 }
1452#endif
1453#ifdef CONFIG_BLK_DEV_HT6560B
1454 case -13: /* "ht6560b" */
1455 probe_ht6560b = 1;
1456 goto done;
1457#endif
1458#ifdef CONFIG_BLK_DEV_QD65XX
1459 case -12: /* "qd65xx" */
1460 probe_qd65xx = 1;
1461 goto done;
1462#endif
1463#ifdef CONFIG_BLK_DEV_4DRIVES
1464 case -11: /* "four" drives on one set of ports */
1465 {
1466 ide_hwif_t *mate = &ide_hwifs[hw^1];
1467 mate->drives[0].select.all ^= 0x20;
1468 mate->drives[1].select.all ^= 0x20;
1469 hwif->chipset = mate->chipset = ide_4drives;
1470 mate->irq = hwif->irq;
1471 memcpy(mate->io_ports, hwif->io_ports, sizeof(hwif->io_ports));
b6209a90
BZ		 1472 hwif->mate = mate;
1473 mate->mate = hwif;
1474 hwif->serialized = mate->serialized = 1;
1475 goto obsolete_option;
1da177e4
LT		 1476 }
1477#endif /* CONFIG_BLK_DEV_4DRIVES */
1478 case -10: /* minus10 */
1479 case -9: /* minus9 */
1480 case -8: /* minus8 */
b6209a90
BZ		 1481 case -4:
1482 case -3:
1da177e4
LT		 1483 goto bad_option;
1484 case -7: /* ata66 */
1485#ifdef CONFIG_BLK_DEV_IDEPCI
49521f97
BZ		 1486 /*
1487 * Use ATA_CBL_PATA40_SHORT so drive side
1488 * cable detection is also overriden.
1489 */
1490 hwif->cbl = ATA_CBL_PATA40_SHORT;
1da177e4
LT		 1491 goto obsolete_option;
1492#else
1493 goto bad_hwif;
1494#endif
1495 case -6: /* dma */
1496 hwif->autodma = 1;
1497 goto obsolete_option;
1498 case -5: /* "reset" */
1499 hwif->reset = 1;
1500 goto obsolete_option;
1da177e4 1501 case -2: /* "serialize" */
1da177e4
LT		 1502 hwif->mate = &ide_hwifs[hw^1];
1503 hwif->mate->mate = hwif;
1504 hwif->serialized = hwif->mate->serialized = 1;
1505 goto obsolete_option;
1506
1507 case -1: /* "noprobe" */
1508 hwif->noprobe = 1;
1509 goto done;
1510
1511 case 1: /* base */
1512 vals[1] = vals[0] + 0x206; /* default ctl */
1513 case 2: /* base,ctl */
1514 vals[2] = 0; /* default irq = probe for it */
1515 case 3: /* base,ctl,irq */
1516 hwif->hw.irq = vals[2];
1517 ide_init_hwif_ports(&hwif->hw, (unsigned long) vals[0], (unsigned long) vals[1], &hwif->irq);
1518 memcpy(hwif->io_ports, hwif->hw.io_ports, sizeof(hwif->io_ports));
1519 hwif->irq = vals[2];
1520 hwif->noprobe = 0;
1521 hwif->chipset = ide_forced;
1522 goto obsolete_option;
1523
1524 case 0: goto bad_option;
1525 default:
1526 printk(" -- SUPPORT NOT CONFIGURED IN THIS KERNEL\n");
1527 return 1;
1528 }
1529 }
1530bad_option:
1531 printk(" -- BAD OPTION\n");
1532 return 1;
1533obsolete_option:
1534 printk(" -- OBSOLETE OPTION, WILL BE REMOVED SOON!\n");
1535 return 1;
1536bad_hwif:
1537 printk("-- NOT SUPPORTED ON ide%d", hw);
1538done:
1539 printk("\n");
1540 return 1;
1541}
1542
eb797227
AV		 1543extern void __init pnpide_init(void);
1544extern void __exit pnpide_exit(void);
1545extern void __init h8300_ide_init(void);
1da177e4
LT		 1546
1547/*
1548 * probe_for_hwifs() finds/initializes "known" IDE interfaces
1549 */
1550static void __init probe_for_hwifs (void)
1551{
6d208b39 1552#ifdef CONFIG_IDEPCI_PCIBUS_ORDER
1da177e4 1553 ide_scan_pcibus(ide_scan_direction);
6d208b39 1554#endif
1da177e4
LT		 1555
1556#ifdef CONFIG_ETRAX_IDE
1557 {
1558 extern void init_e100_ide(void);
1559 init_e100_ide();
1560 }
1561#endif /* CONFIG_ETRAX_IDE */
1562#ifdef CONFIG_BLK_DEV_CMD640
1563 {
1564 extern void ide_probe_for_cmd640x(void);
1565 ide_probe_for_cmd640x();
1566 }
1567#endif /* CONFIG_BLK_DEV_CMD640 */
1568#ifdef CONFIG_BLK_DEV_IDE_PMAC
1569 {
9e5755bc
AM		 1570 extern int pmac_ide_probe(void);
1571 (void)pmac_ide_probe();
1da177e4
LT		 1572 }
1573#endif /* CONFIG_BLK_DEV_IDE_PMAC */
1574#ifdef CONFIG_BLK_DEV_GAYLE
1575 {
1576 extern void gayle_init(void);
1577 gayle_init();
1578 }
1579#endif /* CONFIG_BLK_DEV_GAYLE */
1580#ifdef CONFIG_BLK_DEV_FALCON_IDE
1581 {
1582 extern void falconide_init(void);
1583 falconide_init();
1584 }
1585#endif /* CONFIG_BLK_DEV_FALCON_IDE */
1586#ifdef CONFIG_BLK_DEV_MAC_IDE
1587 {
1588 extern void macide_init(void);
1589 macide_init();
1590 }
1591#endif /* CONFIG_BLK_DEV_MAC_IDE */
1592#ifdef CONFIG_BLK_DEV_Q40IDE
1593 {
1594 extern void q40ide_init(void);
1595 q40ide_init();
1596 }
1597#endif /* CONFIG_BLK_DEV_Q40IDE */
1598#ifdef CONFIG_BLK_DEV_BUDDHA
1599 {
1600 extern void buddha_init(void);
1601 buddha_init();
1602 }
1603#endif /* CONFIG_BLK_DEV_BUDDHA */
1604#ifdef CONFIG_BLK_DEV_IDEPNP
1605 pnpide_init();
1606#endif
1607#ifdef CONFIG_H8300
1608 h8300_ide_init();
1609#endif
1610}
1611
1da177e4
LT		 1612/*
1613 * Probe module
1614 */
1615
1616EXPORT_SYMBOL(ide_lock);
1617
8604affd
BZ		 1618static int ide_bus_match(struct device *dev, struct device_driver *drv)
1619{
1620 return 1;
1621}
1622
263756ec
KS		 1623static char *media_string(ide_drive_t *drive)
1624{
1625 switch (drive->media) {
1626 case ide_disk:
1627 return "disk";
1628 case ide_cdrom:
1629 return "cdrom";
1630 case ide_tape:
1631 return "tape";
1632 case ide_floppy:
1633 return "floppy";
a7a832de
DK		 1634 case ide_optical:
1635 return "optical";
263756ec
KS		 1636 default:
1637 return "UNKNOWN";
1638 }
1639}
1640
1641static ssize_t media_show(struct device *dev, struct device_attribute *attr, char *buf)
1642{
1643 ide_drive_t *drive = to_ide_device(dev);
1644 return sprintf(buf, "%s\n", media_string(drive));
1645}
1646
1647static ssize_t drivename_show(struct device *dev, struct device_attribute *attr, char *buf)
1648{
1649 ide_drive_t *drive = to_ide_device(dev);
1650 return sprintf(buf, "%s\n", drive->name);
1651}
1652
1653static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf)
1654{
1655 ide_drive_t *drive = to_ide_device(dev);
1656 return sprintf(buf, "ide:m-%s\n", media_string(drive));
1657}
1658
1659static struct device_attribute ide_dev_attrs[] = {
1660 __ATTR_RO(media),
1661 __ATTR_RO(drivename),
1662 __ATTR_RO(modalias),
1663 __ATTR_NULL
1664};
1665
7eff2e7a 1666static int ide_uevent(struct device *dev, struct kobj_uevent_env *env)
263756ec
KS		 1667{
1668 ide_drive_t *drive = to_ide_device(dev);
7eff2e7a
KS		 1669
1670 add_uevent_var(env, "MEDIA=%s", media_string(drive));
1671 add_uevent_var(env, "DRIVENAME=%s", drive->name);
1672 add_uevent_var(env, "MODALIAS=ide:m-%s", media_string(drive));
263756ec
KS		 1673 return 0;
1674}
1675
4031bbe4
RK		 1676static int generic_ide_probe(struct device *dev)
1677{
1678 ide_drive_t *drive = to_ide_device(dev);
1679 ide_driver_t *drv = to_ide_driver(dev->driver);
1680
1681 return drv->probe ? drv->probe(drive) : -ENODEV;
1682}
1683
1684static int generic_ide_remove(struct device *dev)
1685{
1686 ide_drive_t *drive = to_ide_device(dev);
1687 ide_driver_t *drv = to_ide_driver(dev->driver);
1688
1689 if (drv->remove)
1690 drv->remove(drive);
1691
1692 return 0;
1693}
1694
1695static void generic_ide_shutdown(struct device *dev)
1696{
1697 ide_drive_t *drive = to_ide_device(dev);
1698 ide_driver_t *drv = to_ide_driver(dev->driver);
1699
1700 if (dev->driver && drv->shutdown)
1701 drv->shutdown(drive);
1702}
1703
1da177e4
LT		 1704struct bus_type ide_bus_type = {
1705 .name = "ide",
8604affd 1706 .match = ide_bus_match,
263756ec 1707 .uevent = ide_uevent,
4031bbe4
RK		 1708 .probe = generic_ide_probe,
1709 .remove = generic_ide_remove,
1710 .shutdown = generic_ide_shutdown,
263756ec 1711 .dev_attrs = ide_dev_attrs,
1da177e4
LT		 1712 .suspend = generic_ide_suspend,
1713 .resume = generic_ide_resume,
1714};
1715
8604affd
BZ		 1716EXPORT_SYMBOL_GPL(ide_bus_type);
1717
1da177e4
LT		 1718/*
1719 * This is gets invoked once during initialization, to set *everything* up
1720 */
1721static int __init ide_init(void)
1722{
349ae23f
RD		 1723 int ret;
1724
1da177e4 1725 printk(KERN_INFO "Uniform Multi-Platform E-IDE driver " REVISION "\n");
1da177e4
LT		 1726 system_bus_speed = ide_system_bus_speed();
1727
349ae23f
RD		 1728 ret = bus_register(&ide_bus_type);
1729 if (ret < 0) {
1730 printk(KERN_WARNING "IDE: bus_register error: %d\n", ret);
1731 return ret;
1732 }
1da177e4
LT		 1733
1734 init_ide_data();
1735
5cbf79cd 1736 proc_ide_create();
1da177e4
LT		 1737
1738#ifdef CONFIG_BLK_DEV_ALI14XX
1739 if (probe_ali14xx)
1740 (void)ali14xx_init();
1741#endif
1742#ifdef CONFIG_BLK_DEV_UMC8672
1743 if (probe_umc8672)
1744 (void)umc8672_init();
1745#endif
1746#ifdef CONFIG_BLK_DEV_DTC2278
1747 if (probe_dtc2278)
1748 (void)dtc2278_init();
1749#endif
1750#ifdef CONFIG_BLK_DEV_HT6560B
1751 if (probe_ht6560b)
1752 (void)ht6560b_init();
1753#endif
1754#ifdef CONFIG_BLK_DEV_QD65XX
1755 if (probe_qd65xx)
1756 (void)qd65xx_init();
1757#endif
1758
1da177e4
LT		 1759 /* Probe for special PCI and other "known" interface chipsets. */
1760 probe_for_hwifs();
1da177e4 1761
1da177e4
LT		 1762 return 0;
1763}
1764
1765#ifdef MODULE
1766static char *options = NULL;
1767module_param(options, charp, 0);
1768MODULE_LICENSE("GPL");
1769
1770static void __init parse_options (char *line)
1771{
1772 char *next = line;
1773
1774 if (line == NULL || !*line)
1775 return;
1776 while ((line = next) != NULL) {
1777 if ((next = strchr(line,' ')) != NULL)
1778 *next++ = 0;
1779 if (!ide_setup(line))
1780 printk (KERN_INFO "Unknown option '%s'\n", line);
1781 }
1782}
1783
fbd8ad30 1784int __init init_module (void)
1da177e4
LT		 1785{
1786 parse_options(options);
1787 return ide_init();
1788}
1789
eb797227 1790void __exit cleanup_module (void)
1da177e4
LT		 1791{
1792 int index;
1793
1794 for (index = 0; index < MAX_HWIFS; ++index)
1795 ide_unregister(index);
1796
6855036a
TH		 1797#ifdef CONFIG_BLK_DEV_IDEPNP
1798 pnpide_exit();
1799#endif
1800
1da177e4 1801 proc_ide_destroy();
1da177e4
LT		 1802
1803 bus_unregister(&ide_bus_type);
1804}
1805
1806#else /* !MODULE */
1807
1808__setup("", ide_setup);
1809
1810module_init(ide_init);
1811
1812#endif /* MODULE */
Linux kernel - Deliverables
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