?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
dm: fix thaw_bdev
[linux-2.6/btrfs-unstable.git] / drivers / ide / ide.c
blob961e6c897286e7a1245d7c56ba3eda2420374761
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 *
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
46 */
47
48 #define REVISION "Revision: 7.00alpha2"
49 #define VERSION "Id: ide.c 7.00a2 20020906"
50
51 #define _IDE_C /* Tell ide.h it's really us */
52
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>
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
85 static 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
91 static int idebus_parameter; /* holds the "idebus=" parameter */
92 static int system_bus_speed; /* holds what we think is VESA/PCI bus speed */
93
94 DEFINE_MUTEX(ide_cfg_mtx);
95 __cacheline_aligned_in_smp DEFINE_SPINLOCK(ide_lock);
96
97 #ifdef CONFIG_IDEPCI_PCIBUS_ORDER
98 static int ide_scan_direction; /* THIS was formerly 2.2.x pci=reverse */
99 #endif
100
101 int noautodma = 0;
102
103 #ifdef CONFIG_BLK_DEV_IDEACPI
104 int ide_noacpi = 0;
105 int ide_noacpitfs = 1;
106 int ide_noacpionboot = 1;
107 #endif
108
109 /*
110 * This is declared extern in ide.h, for access by other IDE modules:
111 */
112 ide_hwif_t ide_hwifs[MAX_HWIFS]; /* master data repository */
113
114 EXPORT_SYMBOL(ide_hwifs);
115
116 /*
117 * Do not even *think* about calling this!
118 */
119 static void init_hwif_data(ide_hwif_t *hwif, unsigned int index)
120 {
121 unsigned int unit;
122
123 /* bulk initialize hwif & drive info with zeros */
124 memset(hwif, 0, sizeof(ide_hwif_t));
125
126 /* fill in any non-zero initial values */
127 hwif->index = index;
128 hwif->major = ide_hwif_to_major[index];
129
130 hwif->name[0] = 'i';
131 hwif->name[1] = 'd';
132 hwif->name[2] = 'e';
133 hwif->name[3] = '0' + index;
134
135 hwif->bus_state = BUSSTATE_ON;
136
137 init_completion(&hwif->gendev_rel_comp);
138
139 default_hwif_iops(hwif);
140 default_hwif_transport(hwif);
141 for (unit = 0; unit < MAX_DRIVES; ++unit) {
142 ide_drive_t *drive = &hwif->drives[unit];
143
144 drive->media = ide_disk;
145 drive->select.all = (unit<<4)|0xa0;
146 drive->hwif = hwif;
147 drive->ctl = 0x08;
148 drive->ready_stat = READY_STAT;
149 drive->bad_wstat = BAD_W_STAT;
150 drive->special.b.recalibrate = 1;
151 drive->special.b.set_geometry = 1;
152 drive->name[0] = 'h';
153 drive->name[1] = 'd';
154 drive->name[2] = 'a' + (index * MAX_DRIVES) + unit;
155 drive->max_failures = IDE_DEFAULT_MAX_FAILURES;
156 drive->using_dma = 0;
157 drive->vdma = 0;
158 INIT_LIST_HEAD(&drive->list);
159 init_completion(&drive->gendev_rel_comp);
160 }
161 }
162
163 static void init_hwif_default(ide_hwif_t *hwif, unsigned int index)
164 {
165 hw_regs_t hw;
166
167 memset(&hw, 0, sizeof(hw_regs_t));
168
169 ide_init_hwif_ports(&hw, ide_default_io_base(index), 0, &hwif->irq);
170
171 memcpy(&hwif->hw, &hw, sizeof(hw));
172 memcpy(hwif->io_ports, hw.io_ports, sizeof(hw.io_ports));
173
174 hwif->noprobe = !hwif->io_ports[IDE_DATA_OFFSET];
175 #ifdef CONFIG_BLK_DEV_HD
176 if (hwif->io_ports[IDE_DATA_OFFSET] == HD_DATA)
177 hwif->noprobe = 1; /* may be overridden by ide_setup() */
178 #endif
179 }
180
181 extern void ide_arm_init(void);
182
183 /*
184 * init_ide_data() sets reasonable default values into all fields
185 * of all instances of the hwifs and drives, but only on the first call.
186 * Subsequent calls have no effect (they don't wipe out anything).
187 *
188 * This routine is normally called at driver initialization time,
189 * but may also be called MUCH earlier during kernel "command-line"
190 * parameter processing. As such, we cannot depend on any other parts
191 * of the kernel (such as memory allocation) to be functioning yet.
192 *
193 * This is too bad, as otherwise we could dynamically allocate the
194 * ide_drive_t structs as needed, rather than always consuming memory
195 * for the max possible number (MAX_HWIFS * MAX_DRIVES) of them.
196 *
197 * FIXME: We should stuff the setup data into __init and copy the
198 * relevant hwifs/allocate them properly during boot.
199 */
200 #define MAGIC_COOKIE 0x12345678
201 static void __init init_ide_data (void)
202 {
203 ide_hwif_t *hwif;
204 unsigned int index;
205 static unsigned long magic_cookie = MAGIC_COOKIE;
206
207 if (magic_cookie != MAGIC_COOKIE)
208 return; /* already initialized */
209 magic_cookie = 0;
210
211 /* Initialise all interface structures */
212 for (index = 0; index < MAX_HWIFS; ++index) {
213 hwif = &ide_hwifs[index];
214 init_hwif_data(hwif, index);
215 init_hwif_default(hwif, index);
216 #if !defined(CONFIG_PPC32) || !defined(CONFIG_PCI)
217 hwif->irq = hwif->hw.irq =
218 ide_init_default_irq(hwif->io_ports[IDE_DATA_OFFSET]);
219 #endif
220 }
221 #ifdef CONFIG_IDE_ARM
222 ide_arm_init();
223 #endif
224 }
225
226 /**
227 * ide_system_bus_speed - guess bus speed
228 *
229 * ide_system_bus_speed() returns what we think is the system VESA/PCI
230 * bus speed (in MHz). This is used for calculating interface PIO timings.
231 * The default is 40 for known PCI systems, 50 otherwise.
232 * The "idebus=xx" parameter can be used to override this value.
233 * The actual value to be used is computed/displayed the first time
234 * through. Drivers should only use this as a last resort.
235 *
236 * Returns a guessed speed in MHz.
237 */
238
239 static int ide_system_bus_speed(void)
240 {
241 #ifdef CONFIG_PCI
242 static struct pci_device_id pci_default[] = {
243 { PCI_DEVICE(PCI_ANY_ID, PCI_ANY_ID) },
244 { }
245 };
246 #else
247 #define pci_default 0
248 #endif /* CONFIG_PCI */
249
250 if (!system_bus_speed) {
251 if (idebus_parameter) {
252 /* user supplied value */
253 system_bus_speed = idebus_parameter;
254 } else if (pci_dev_present(pci_default)) {
255 /* safe default value for PCI */
256 system_bus_speed = 33;
257 } else {
258 /* safe default value for VESA and PCI */
259 system_bus_speed = 50;
260 }
261 printk(KERN_INFO "ide: Assuming %dMHz system bus speed "
262 "for PIO modes%s\n", system_bus_speed,
263 idebus_parameter ? "" : "; override with idebus=xx");
264 }
265 return system_bus_speed;
266 }
267
268 static struct resource* hwif_request_region(ide_hwif_t *hwif,
269 unsigned long addr, int num)
270 {
271 struct resource *res = request_region(addr, num, hwif->name);
272
273 if (!res)
274 printk(KERN_ERR "%s: I/O resource 0x%lX-0x%lX not free.\n",
275 hwif->name, addr, addr+num-1);
276 return res;
277 }
278
279 /**
280 * ide_hwif_request_regions - request resources for IDE
281 * @hwif: interface to use
282 *
283 * Requests all the needed resources for an interface.
284 * Right now core IDE code does this work which is deeply wrong.
285 * MMIO leaves it to the controller driver,
286 * PIO will migrate this way over time.
287 */
288
289 int ide_hwif_request_regions(ide_hwif_t *hwif)
290 {
291 unsigned long addr;
292 unsigned int i;
293
294 if (hwif->mmio)
295 return 0;
296 addr = hwif->io_ports[IDE_CONTROL_OFFSET];
297 if (addr && !hwif_request_region(hwif, addr, 1))
298 goto control_region_busy;
299 hwif->straight8 = 0;
300 addr = hwif->io_ports[IDE_DATA_OFFSET];
301 if ((addr | 7) == hwif->io_ports[IDE_STATUS_OFFSET]) {
302 if (!hwif_request_region(hwif, addr, 8))
303 goto data_region_busy;
304 hwif->straight8 = 1;
305 return 0;
306 }
307 for (i = IDE_DATA_OFFSET; i <= IDE_STATUS_OFFSET; i++) {
308 addr = hwif->io_ports[i];
309 if (!hwif_request_region(hwif, addr, 1)) {
310 while (--i)
311 release_region(addr, 1);
312 goto data_region_busy;
313 }
314 }
315 return 0;
316
317 data_region_busy:
318 addr = hwif->io_ports[IDE_CONTROL_OFFSET];
319 if (addr)
320 release_region(addr, 1);
321 control_region_busy:
322 /* If any errors are return, we drop the hwif interface. */
323 return -EBUSY;
324 }
325
326 /**
327 * ide_hwif_release_regions - free IDE resources
328 *
329 * Note that we only release the standard ports,
330 * and do not even try to handle any extra ports
331 * allocated for weird IDE interface chipsets.
332 *
333 * Note also that we don't yet handle mmio resources here. More
334 * importantly our caller should be doing this so we need to
335 * restructure this as a helper function for drivers.
336 */
337
338 void ide_hwif_release_regions(ide_hwif_t *hwif)
339 {
340 u32 i = 0;
341
342 if (hwif->mmio)
343 return;
344 if (hwif->io_ports[IDE_CONTROL_OFFSET])
345 release_region(hwif->io_ports[IDE_CONTROL_OFFSET], 1);
346 if (hwif->straight8) {
347 release_region(hwif->io_ports[IDE_DATA_OFFSET], 8);
348 return;
349 }
350 for (i = IDE_DATA_OFFSET; i <= IDE_STATUS_OFFSET; i++)
351 if (hwif->io_ports[i])
352 release_region(hwif->io_ports[i], 1);
353 }
354
355 /**
356 * ide_hwif_restore - restore hwif to template
357 * @hwif: hwif to update
358 * @tmp_hwif: template
359 *
360 * Restore hwif to a previous state by copying most settings
361 * from the template.
362 */
363
364 static void ide_hwif_restore(ide_hwif_t *hwif, ide_hwif_t *tmp_hwif)
365 {
366 hwif->hwgroup = tmp_hwif->hwgroup;
367
368 hwif->gendev.parent = tmp_hwif->gendev.parent;
369
370 hwif->proc = tmp_hwif->proc;
371
372 hwif->major = tmp_hwif->major;
373 hwif->straight8 = tmp_hwif->straight8;
374 hwif->bus_state = tmp_hwif->bus_state;
375
376 hwif->host_flags = tmp_hwif->host_flags;
377
378 hwif->pio_mask = tmp_hwif->pio_mask;
379
380 hwif->ultra_mask = tmp_hwif->ultra_mask;
381 hwif->mwdma_mask = tmp_hwif->mwdma_mask;
382 hwif->swdma_mask = tmp_hwif->swdma_mask;
383
384 hwif->cbl = tmp_hwif->cbl;
385
386 hwif->chipset = tmp_hwif->chipset;
387 hwif->hold = tmp_hwif->hold;
388
389 #ifdef CONFIG_BLK_DEV_IDEPCI
390 hwif->pci_dev = tmp_hwif->pci_dev;
391 hwif->cds = tmp_hwif->cds;
392 #endif
393
394 hwif->set_pio_mode = tmp_hwif->set_pio_mode;
395 hwif->set_dma_mode = tmp_hwif->set_dma_mode;
396 hwif->mdma_filter = tmp_hwif->mdma_filter;
397 hwif->udma_filter = tmp_hwif->udma_filter;
398 hwif->selectproc = tmp_hwif->selectproc;
399 hwif->reset_poll = tmp_hwif->reset_poll;
400 hwif->pre_reset = tmp_hwif->pre_reset;
401 hwif->resetproc = tmp_hwif->resetproc;
402 hwif->intrproc = tmp_hwif->intrproc;
403 hwif->maskproc = tmp_hwif->maskproc;
404 hwif->quirkproc = tmp_hwif->quirkproc;
405 hwif->busproc = tmp_hwif->busproc;
406
407 hwif->ata_input_data = tmp_hwif->ata_input_data;
408 hwif->ata_output_data = tmp_hwif->ata_output_data;
409 hwif->atapi_input_bytes = tmp_hwif->atapi_input_bytes;
410 hwif->atapi_output_bytes = tmp_hwif->atapi_output_bytes;
411
412 hwif->dma_setup = tmp_hwif->dma_setup;
413 hwif->dma_exec_cmd = tmp_hwif->dma_exec_cmd;
414 hwif->dma_start = tmp_hwif->dma_start;
415 hwif->ide_dma_end = tmp_hwif->ide_dma_end;
416 hwif->ide_dma_on = tmp_hwif->ide_dma_on;
417 hwif->dma_off_quietly = tmp_hwif->dma_off_quietly;
418 hwif->ide_dma_test_irq = tmp_hwif->ide_dma_test_irq;
419 hwif->ide_dma_clear_irq = tmp_hwif->ide_dma_clear_irq;
420 hwif->dma_host_on = tmp_hwif->dma_host_on;
421 hwif->dma_host_off = tmp_hwif->dma_host_off;
422 hwif->dma_lost_irq = tmp_hwif->dma_lost_irq;
423 hwif->dma_timeout = tmp_hwif->dma_timeout;
424
425 hwif->OUTB = tmp_hwif->OUTB;
426 hwif->OUTBSYNC = tmp_hwif->OUTBSYNC;
427 hwif->OUTW = tmp_hwif->OUTW;
428 hwif->OUTSW = tmp_hwif->OUTSW;
429 hwif->OUTSL = tmp_hwif->OUTSL;
430
431 hwif->INB = tmp_hwif->INB;
432 hwif->INW = tmp_hwif->INW;
433 hwif->INSW = tmp_hwif->INSW;
434 hwif->INSL = tmp_hwif->INSL;
435
436 hwif->sg_max_nents = tmp_hwif->sg_max_nents;
437
438 hwif->mmio = tmp_hwif->mmio;
439 hwif->rqsize = tmp_hwif->rqsize;
440
441 #ifndef CONFIG_BLK_DEV_IDECS
442 hwif->irq = tmp_hwif->irq;
443 #endif
444
445 hwif->dma_base = tmp_hwif->dma_base;
446 hwif->dma_master = tmp_hwif->dma_master;
447 hwif->dma_command = tmp_hwif->dma_command;
448 hwif->dma_vendor1 = tmp_hwif->dma_vendor1;
449 hwif->dma_status = tmp_hwif->dma_status;
450 hwif->dma_vendor3 = tmp_hwif->dma_vendor3;
451 hwif->dma_prdtable = tmp_hwif->dma_prdtable;
452
453 hwif->config_data = tmp_hwif->config_data;
454 hwif->select_data = tmp_hwif->select_data;
455 hwif->extra_base = tmp_hwif->extra_base;
456 hwif->extra_ports = tmp_hwif->extra_ports;
457
458 hwif->hwif_data = tmp_hwif->hwif_data;
459 }
460
461 /**
462 * ide_unregister - free an IDE interface
463 * @index: index of interface (will change soon to a pointer)
464 *
465 * Perform the final unregister of an IDE interface. At the moment
466 * we don't refcount interfaces so this will also get split up.
467 *
468 * Locking:
469 * The caller must not hold the IDE locks
470 * The drive present/vanishing is not yet properly locked
471 * Take care with the callbacks. These have been split to avoid
472 * deadlocking the IDE layer. The shutdown callback is called
473 * before we take the lock and free resources. It is up to the
474 * caller to be sure there is no pending I/O here, and that
475 * the interface will not be reopened (present/vanishing locking
476 * isn't yet done BTW). After we commit to the final kill we
477 * call the cleanup callback with the ide locks held.
478 *
479 * Unregister restores the hwif structures to the default state.
480 * This is raving bonkers.
481 */
482
483 void ide_unregister(unsigned int index)
484 {
485 ide_drive_t *drive;
486 ide_hwif_t *hwif, *g;
487 static ide_hwif_t tmp_hwif; /* protected by ide_cfg_mtx */
488 ide_hwgroup_t *hwgroup;
489 int irq_count = 0, unit;
490
491 BUG_ON(index >= MAX_HWIFS);
492
493 BUG_ON(in_interrupt());
494 BUG_ON(irqs_disabled());
495 mutex_lock(&ide_cfg_mtx);
496 spin_lock_irq(&ide_lock);
497 hwif = &ide_hwifs[index];
498 if (!hwif->present)
499 goto abort;
500 for (unit = 0; unit < MAX_DRIVES; ++unit) {
501 drive = &hwif->drives[unit];
502 if (!drive->present)
503 continue;
504 spin_unlock_irq(&ide_lock);
505 device_unregister(&drive->gendev);
506 wait_for_completion(&drive->gendev_rel_comp);
507 spin_lock_irq(&ide_lock);
508 }
509 hwif->present = 0;
510
511 spin_unlock_irq(&ide_lock);
512
513 ide_proc_unregister_port(hwif);
514
515 hwgroup = hwif->hwgroup;
516 /*
517 * free the irq if we were the only hwif using it
518 */
519 g = hwgroup->hwif;
520 do {
521 if (g->irq == hwif->irq)
522 ++irq_count;
523 g = g->next;
524 } while (g != hwgroup->hwif);
525 if (irq_count == 1)
526 free_irq(hwif->irq, hwgroup);
527
528 spin_lock_irq(&ide_lock);
529 /*
530 * Note that we only release the standard ports,
531 * and do not even try to handle any extra ports
532 * allocated for weird IDE interface chipsets.
533 */
534 ide_hwif_release_regions(hwif);
535
536 /*
537 * Remove us from the hwgroup, and free
538 * the hwgroup if we were the only member
539 */
540 if (hwif->next == hwif) {
541 BUG_ON(hwgroup->hwif != hwif);
542 kfree(hwgroup);
543 } else {
544 /* There is another interface in hwgroup.
545 * Unlink us, and set hwgroup->drive and ->hwif to
546 * something sane.
547 */
548 g = hwgroup->hwif;
549 while (g->next != hwif)
550 g = g->next;
551 g->next = hwif->next;
552 if (hwgroup->hwif == hwif) {
553 /* Chose a random hwif for hwgroup->hwif.
554 * It's guaranteed that there are no drives
555 * left in the hwgroup.
556 */
557 BUG_ON(hwgroup->drive != NULL);
558 hwgroup->hwif = g;
559 }
560 BUG_ON(hwgroup->hwif == hwif);
561 }
562
563 /* More messed up locking ... */
564 spin_unlock_irq(&ide_lock);
565 device_unregister(&hwif->gendev);
566 wait_for_completion(&hwif->gendev_rel_comp);
567
568 /*
569 * Remove us from the kernel's knowledge
570 */
571 blk_unregister_region(MKDEV(hwif->major, 0), MAX_DRIVES<<PARTN_BITS);
572 kfree(hwif->sg_table);
573 unregister_blkdev(hwif->major, hwif->name);
574 spin_lock_irq(&ide_lock);
575
576 if (hwif->dma_base) {
577 (void) ide_release_dma(hwif);
578
579 hwif->dma_base = 0;
580 hwif->dma_master = 0;
581 hwif->dma_command = 0;
582 hwif->dma_vendor1 = 0;
583 hwif->dma_status = 0;
584 hwif->dma_vendor3 = 0;
585 hwif->dma_prdtable = 0;
586
587 hwif->extra_base = 0;
588 hwif->extra_ports = 0;
589 }
590
591 /* copy original settings */
592 tmp_hwif = *hwif;
593
594 /* restore hwif data to pristine status */
595 init_hwif_data(hwif, index);
596 init_hwif_default(hwif, index);
597
598 ide_hwif_restore(hwif, &tmp_hwif);
599
600 abort:
601 spin_unlock_irq(&ide_lock);
602 mutex_unlock(&ide_cfg_mtx);
603 }
604
605 EXPORT_SYMBOL(ide_unregister);
606
607
608 /**
609 * ide_setup_ports - set up IDE interface ports
610 * @hw: register descriptions
611 * @base: base register
612 * @offsets: table of register offsets
613 * @ctrl: control register
614 * @ack_irq: IRQ ack
615 * @irq: interrupt lie
616 *
617 * Setup hw_regs_t structure described by parameters. You
618 * may set up the hw structure yourself OR use this routine to
619 * do it for you. This is basically a helper
620 *
621 */
622
623 void ide_setup_ports ( hw_regs_t *hw,
624 unsigned long base, int *offsets,
625 unsigned long ctrl, unsigned long intr,
626 ide_ack_intr_t *ack_intr,
627 /*
628 * ide_io_ops_t *iops,
629 */
630 int irq)
631 {
632 int i;
633
634 memset(hw, 0, sizeof(hw_regs_t));
635 for (i = 0; i < IDE_NR_PORTS; i++) {
636 if (offsets[i] == -1) {
637 switch(i) {
638 case IDE_CONTROL_OFFSET:
639 hw->io_ports[i] = ctrl;
640 break;
641 #if defined(CONFIG_AMIGA) || defined(CONFIG_MAC)
642 case IDE_IRQ_OFFSET:
643 hw->io_ports[i] = intr;
644 break;
645 #endif /* (CONFIG_AMIGA) || (CONFIG_MAC) */
646 default:
647 hw->io_ports[i] = 0;
648 break;
649 }
650 } else {
651 hw->io_ports[i] = base + offsets[i];
652 }
653 }
654 hw->irq = irq;
655 hw->dma = NO_DMA;
656 hw->ack_intr = ack_intr;
657 /*
658 * hw->iops = iops;
659 */
660 }
661
662 /**
663 * ide_register_hw_with_fixup - register IDE interface
664 * @hw: hardware registers
665 * @initializing: set while initializing built-in drivers
666 * @hwifp: pointer to returned hwif
667 * @fixup: fixup function
668 *
669 * Register an IDE interface, specifying exactly the registers etc.
670 * Set init=1 iff calling before probes have taken place.
671 *
672 * Returns -1 on error.
673 */
674
675 int ide_register_hw_with_fixup(hw_regs_t *hw, int initializing,
676 ide_hwif_t **hwifp,
677 void(*fixup)(ide_hwif_t *hwif))
678 {
679 int index, retry = 1;
680 ide_hwif_t *hwif;
681
682 do {
683 for (index = 0; index < MAX_HWIFS; ++index) {
684 hwif = &ide_hwifs[index];
685 if (hwif->hw.io_ports[IDE_DATA_OFFSET] == hw->io_ports[IDE_DATA_OFFSET])
686 goto found;
687 }
688 for (index = 0; index < MAX_HWIFS; ++index) {
689 hwif = &ide_hwifs[index];
690 if (hwif->hold)
691 continue;
692 if ((!hwif->present && !hwif->mate && !initializing) ||
693 (!hwif->hw.io_ports[IDE_DATA_OFFSET] && initializing))
694 goto found;
695 }
696 for (index = 0; index < MAX_HWIFS; index++)
697 ide_unregister(index);
698 } while (retry--);
699 return -1;
700 found:
701 if (hwif->present)
702 ide_unregister(index);
703 else if (!hwif->hold) {
704 init_hwif_data(hwif, index);
705 init_hwif_default(hwif, index);
706 }
707 if (hwif->present)
708 return -1;
709 memcpy(&hwif->hw, hw, sizeof(*hw));
710 memcpy(hwif->io_ports, hwif->hw.io_ports, sizeof(hwif->hw.io_ports));
711 hwif->irq = hw->irq;
712 hwif->noprobe = 0;
713 hwif->chipset = hw->chipset;
714 hwif->gendev.parent = hw->dev;
715
716 if (!initializing) {
717 probe_hwif_init_with_fixup(hwif, fixup);
718 ide_proc_register_port(hwif);
719 }
720
721 if (hwifp)
722 *hwifp = hwif;
723
724 return (initializing || hwif->present) ? index : -1;
725 }
726
727 EXPORT_SYMBOL(ide_register_hw_with_fixup);
728
729 int ide_register_hw(hw_regs_t *hw, int initializing, ide_hwif_t **hwifp)
730 {
731 return ide_register_hw_with_fixup(hw, initializing, hwifp, NULL);
732 }
733
734 EXPORT_SYMBOL(ide_register_hw);
735
736 /*
737 * Locks for IDE setting functionality
738 */
739
740 DEFINE_MUTEX(ide_setting_mtx);
741
742 EXPORT_SYMBOL_GPL(ide_setting_mtx);
743
744 /**
745 * ide_spin_wait_hwgroup - wait for group
746 * @drive: drive in the group
747 *
748 * Wait for an IDE device group to go non busy and then return
749 * holding the ide_lock which guards the hwgroup->busy status
750 * and right to use it.
751 */
752
753 int ide_spin_wait_hwgroup (ide_drive_t *drive)
754 {
755 ide_hwgroup_t *hwgroup = HWGROUP(drive);
756 unsigned long timeout = jiffies + (3 * HZ);
757
758 spin_lock_irq(&ide_lock);
759
760 while (hwgroup->busy) {
761 unsigned long lflags;
762 spin_unlock_irq(&ide_lock);
763 local_irq_set(lflags);
764 if (time_after(jiffies, timeout)) {
765 local_irq_restore(lflags);
766 printk(KERN_ERR "%s: channel busy\n", drive->name);
767 return -EBUSY;
768 }
769 local_irq_restore(lflags);
770 spin_lock_irq(&ide_lock);
771 }
772 return 0;
773 }
774
775 EXPORT_SYMBOL(ide_spin_wait_hwgroup);
776
777 int set_io_32bit(ide_drive_t *drive, int arg)
778 {
779 if (drive->no_io_32bit)
780 return -EPERM;
781
782 if (arg < 0 || arg > 1 + (SUPPORT_VLB_SYNC << 1))
783 return -EINVAL;
784
785 drive->io_32bit = arg;
786 #ifdef CONFIG_BLK_DEV_DTC2278
787 if (HWIF(drive)->chipset == ide_dtc2278)
788 HWIF(drive)->drives[!drive->select.b.unit].io_32bit = arg;
789 #endif /* CONFIG_BLK_DEV_DTC2278 */
790 return 0;
791 }
792
793 static int set_ksettings(ide_drive_t *drive, int arg)
794 {
795 if (arg < 0 || arg > 1)
796 return -EINVAL;
797
798 if (ide_spin_wait_hwgroup(drive))
799 return -EBUSY;
800 drive->keep_settings = arg;
801 spin_unlock_irq(&ide_lock);
802
803 return 0;
804 }
805
806 int set_using_dma(ide_drive_t *drive, int arg)
807 {
808 #ifdef CONFIG_BLK_DEV_IDEDMA
809 ide_hwif_t *hwif = drive->hwif;
810 int err = -EPERM;
811
812 if (arg < 0 || arg > 1)
813 return -EINVAL;
814
815 if (!drive->id || !(drive->id->capability & 1))
816 goto out;
817
818 if (hwif->ide_dma_on == NULL)
819 goto out;
820
821 err = -EBUSY;
822 if (ide_spin_wait_hwgroup(drive))
823 goto out;
824 /*
825 * set ->busy flag, unlock and let it ride
826 */
827 hwif->hwgroup->busy = 1;
828 spin_unlock_irq(&ide_lock);
829
830 err = 0;
831
832 if (arg) {
833 hwif->dma_off_quietly(drive);
834 if (ide_set_dma(drive) || hwif->ide_dma_on(drive))
835 err = -EIO;
836 } else
837 ide_dma_off(drive);
838
839 /*
840 * lock, clear ->busy flag and unlock before leaving
841 */
842 spin_lock_irq(&ide_lock);
843 hwif->hwgroup->busy = 0;
844 spin_unlock_irq(&ide_lock);
845 out:
846 return err;
847 #else
848 if (arg < 0 || arg > 1)
849 return -EINVAL;
850
851 return -EPERM;
852 #endif
853 }
854
855 int set_pio_mode(ide_drive_t *drive, int arg)
856 {
857 struct request rq;
858
859 if (arg < 0 || arg > 255)
860 return -EINVAL;
861
862 if (drive->hwif->set_pio_mode == NULL)
863 return -ENOSYS;
864
865 if (drive->special.b.set_tune)
866 return -EBUSY;
867 ide_init_drive_cmd(&rq);
868 drive->tune_req = (u8) arg;
869 drive->special.b.set_tune = 1;
870 (void) ide_do_drive_cmd(drive, &rq, ide_wait);
871 return 0;
872 }
873
874 static int set_unmaskirq(ide_drive_t *drive, int arg)
875 {
876 if (drive->no_unmask)
877 return -EPERM;
878
879 if (arg < 0 || arg > 1)
880 return -EINVAL;
881
882 if (ide_spin_wait_hwgroup(drive))
883 return -EBUSY;
884 drive->unmask = arg;
885 spin_unlock_irq(&ide_lock);
886
887 return 0;
888 }
889
890 /**
891 * system_bus_clock - clock guess
892 *
893 * External version of the bus clock guess used by very old IDE drivers
894 * for things like VLB timings. Should not be used.
895 */
896
897 int system_bus_clock (void)
898 {
899 return((int) ((!system_bus_speed) ? ide_system_bus_speed() : system_bus_speed ));
900 }
901
902 EXPORT_SYMBOL(system_bus_clock);
903
904 static int generic_ide_suspend(struct device *dev, pm_message_t mesg)
905 {
906 ide_drive_t *drive = dev->driver_data;
907 ide_hwif_t *hwif = HWIF(drive);
908 struct request rq;
909 struct request_pm_state rqpm;
910 ide_task_t args;
911 int ret;
912
913 /* Call ACPI _GTM only once */
914 if (!(drive->dn % 2))
915 ide_acpi_get_timing(hwif);
916
917 memset(&rq, 0, sizeof(rq));
918 memset(&rqpm, 0, sizeof(rqpm));
919 memset(&args, 0, sizeof(args));
920 rq.cmd_type = REQ_TYPE_PM_SUSPEND;
921 rq.special = &args;
922 rq.data = &rqpm;
923 rqpm.pm_step = ide_pm_state_start_suspend;
924 if (mesg.event == PM_EVENT_PRETHAW)
925 mesg.event = PM_EVENT_FREEZE;
926 rqpm.pm_state = mesg.event;
927
928 ret = ide_do_drive_cmd(drive, &rq, ide_wait);
929 /* only call ACPI _PS3 after both drivers are suspended */
930 if (!ret && (((drive->dn % 2) && hwif->drives[0].present
931 && hwif->drives[1].present)
932 || !hwif->drives[0].present
933 || !hwif->drives[1].present))
934 ide_acpi_set_state(hwif, 0);
935 return ret;
936 }
937
938 static int generic_ide_resume(struct device *dev)
939 {
940 ide_drive_t *drive = dev->driver_data;
941 ide_hwif_t *hwif = HWIF(drive);
942 struct request rq;
943 struct request_pm_state rqpm;
944 ide_task_t args;
945 int err;
946
947 /* Call ACPI _STM only once */
948 if (!(drive->dn % 2)) {
949 ide_acpi_set_state(hwif, 1);
950 ide_acpi_push_timing(hwif);
951 }
952
953 ide_acpi_exec_tfs(drive);
954
955 memset(&rq, 0, sizeof(rq));
956 memset(&rqpm, 0, sizeof(rqpm));
957 memset(&args, 0, sizeof(args));
958 rq.cmd_type = REQ_TYPE_PM_RESUME;
959 rq.special = &args;
960 rq.data = &rqpm;
961 rqpm.pm_step = ide_pm_state_start_resume;
962 rqpm.pm_state = PM_EVENT_ON;
963
964 err = ide_do_drive_cmd(drive, &rq, ide_head_wait);
965
966 if (err == 0 && dev->driver) {
967 ide_driver_t *drv = to_ide_driver(dev->driver);
968
969 if (drv->resume)
970 drv->resume(drive);
971 }
972
973 return err;
974 }
975
976 int generic_ide_ioctl(ide_drive_t *drive, struct file *file, struct block_device *bdev,
977 unsigned int cmd, unsigned long arg)
978 {
979 unsigned long flags;
980 ide_driver_t *drv;
981 void __user *p = (void __user *)arg;
982 int err = 0, (*setfunc)(ide_drive_t *, int);
983 u8 *val;
984
985 switch (cmd) {
986 case HDIO_GET_32BIT: val = &drive->io_32bit; goto read_val;
987 case HDIO_GET_KEEPSETTINGS: val = &drive->keep_settings; goto read_val;
988 case HDIO_GET_UNMASKINTR: val = &drive->unmask; goto read_val;
989 case HDIO_GET_DMA: val = &drive->using_dma; goto read_val;
990 case HDIO_SET_32BIT: setfunc = set_io_32bit; goto set_val;
991 case HDIO_SET_KEEPSETTINGS: setfunc = set_ksettings; goto set_val;
992 case HDIO_SET_PIO_MODE: setfunc = set_pio_mode; goto set_val;
993 case HDIO_SET_UNMASKINTR: setfunc = set_unmaskirq; goto set_val;
994 case HDIO_SET_DMA: setfunc = set_using_dma; goto set_val;
995 }
996
997 switch (cmd) {
998 case HDIO_OBSOLETE_IDENTITY:
999 case HDIO_GET_IDENTITY:
1000 if (bdev != bdev->bd_contains)
1001 return -EINVAL;
1002 if (drive->id_read == 0)
1003 return -ENOMSG;
1004 if (copy_to_user(p, drive->id, (cmd == HDIO_GET_IDENTITY) ? sizeof(*drive->id) : 142))
1005 return -EFAULT;
1006 return 0;
1007
1008 case HDIO_GET_NICE:
1009 return put_user(drive->dsc_overlap << IDE_NICE_DSC_OVERLAP |
1010 drive->atapi_overlap << IDE_NICE_ATAPI_OVERLAP |
1011 drive->nice0 << IDE_NICE_0 |
1012 drive->nice1 << IDE_NICE_1 |
1013 drive->nice2 << IDE_NICE_2,
1014 (long __user *) arg);
1015
1016 #ifdef CONFIG_IDE_TASK_IOCTL
1017 case HDIO_DRIVE_TASKFILE:
1018 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
1019 return -EACCES;
1020 switch(drive->media) {
1021 case ide_disk:
1022 return ide_taskfile_ioctl(drive, cmd, arg);
1023 default:
1024 return -ENOMSG;
1025 }
1026 #endif /* CONFIG_IDE_TASK_IOCTL */
1027
1028 case HDIO_DRIVE_CMD:
1029 if (!capable(CAP_SYS_RAWIO))
1030 return -EACCES;
1031 return ide_cmd_ioctl(drive, cmd, arg);
1032
1033 case HDIO_DRIVE_TASK:
1034 if (!capable(CAP_SYS_RAWIO))
1035 return -EACCES;
1036 return ide_task_ioctl(drive, cmd, arg);
1037
1038 case HDIO_SCAN_HWIF:
1039 {
1040 hw_regs_t hw;
1041 int args[3];
1042 if (!capable(CAP_SYS_RAWIO)) return -EACCES;
1043 if (copy_from_user(args, p, 3 * sizeof(int)))
1044 return -EFAULT;
1045 memset(&hw, 0, sizeof(hw));
1046 ide_init_hwif_ports(&hw, (unsigned long) args[0],
1047 (unsigned long) args[1], NULL);
1048 hw.irq = args[2];
1049 if (ide_register_hw(&hw, 0, NULL) == -1)
1050 return -EIO;
1051 return 0;
1052 }
1053 case HDIO_UNREGISTER_HWIF:
1054 if (!capable(CAP_SYS_RAWIO)) return -EACCES;
1055 /* (arg > MAX_HWIFS) checked in function */
1056 ide_unregister(arg);
1057 return 0;
1058 case HDIO_SET_NICE:
1059 if (!capable(CAP_SYS_ADMIN)) return -EACCES;
1060 if (arg != (arg & ((1 << IDE_NICE_DSC_OVERLAP) | (1 << IDE_NICE_1))))
1061 return -EPERM;
1062 drive->dsc_overlap = (arg >> IDE_NICE_DSC_OVERLAP) & 1;
1063 drv = *(ide_driver_t **)bdev->bd_disk->private_data;
1064 if (drive->dsc_overlap && !drv->supports_dsc_overlap) {
1065 drive->dsc_overlap = 0;
1066 return -EPERM;
1067 }
1068 drive->nice1 = (arg >> IDE_NICE_1) & 1;
1069 return 0;
1070 case HDIO_DRIVE_RESET:
1071 {
1072 unsigned long flags;
1073 if (!capable(CAP_SYS_ADMIN)) return -EACCES;
1074
1075 /*
1076 * Abort the current command on the
1077 * group if there is one, taking
1078 * care not to allow anything else
1079 * to be queued and to die on the
1080 * spot if we miss one somehow
1081 */
1082
1083 spin_lock_irqsave(&ide_lock, flags);
1084
1085 if (HWGROUP(drive)->resetting) {
1086 spin_unlock_irqrestore(&ide_lock, flags);
1087 return -EBUSY;
1088 }
1089
1090 ide_abort(drive, "drive reset");
1091
1092 BUG_ON(HWGROUP(drive)->handler);
1093
1094 /* Ensure nothing gets queued after we
1095 drop the lock. Reset will clear the busy */
1096
1097 HWGROUP(drive)->busy = 1;
1098 spin_unlock_irqrestore(&ide_lock, flags);
1099 (void) ide_do_reset(drive);
1100
1101 return 0;
1102 }
1103
1104 case HDIO_GET_BUSSTATE:
1105 if (!capable(CAP_SYS_ADMIN))
1106 return -EACCES;
1107 if (put_user(HWIF(drive)->bus_state, (long __user *)arg))
1108 return -EFAULT;
1109 return 0;
1110
1111 case HDIO_SET_BUSSTATE:
1112 if (!capable(CAP_SYS_ADMIN))
1113 return -EACCES;
1114 if (HWIF(drive)->busproc)
1115 return HWIF(drive)->busproc(drive, (int)arg);
1116 return -EOPNOTSUPP;
1117 default:
1118 return -EINVAL;
1119 }
1120
1121 read_val:
1122 mutex_lock(&ide_setting_mtx);
1123 spin_lock_irqsave(&ide_lock, flags);
1124 err = *val;
1125 spin_unlock_irqrestore(&ide_lock, flags);
1126 mutex_unlock(&ide_setting_mtx);
1127 return err >= 0 ? put_user(err, (long __user *)arg) : err;
1128
1129 set_val:
1130 if (bdev != bdev->bd_contains)
1131 err = -EINVAL;
1132 else {
1133 if (!capable(CAP_SYS_ADMIN))
1134 err = -EACCES;
1135 else {
1136 mutex_lock(&ide_setting_mtx);
1137 err = setfunc(drive, arg);
1138 mutex_unlock(&ide_setting_mtx);
1139 }
1140 }
1141 return err;
1142 }
1143
1144 EXPORT_SYMBOL(generic_ide_ioctl);
1145
1146 /*
1147 * stridx() returns the offset of c within s,
1148 * or -1 if c is '\0' or not found within s.
1149 */
1150 static int __init stridx (const char *s, char c)
1151 {
1152 char *i = strchr(s, c);
1153 return (i && c) ? i - s : -1;
1154 }
1155
1156 /*
1157 * match_parm() does parsing for ide_setup():
1158 *
1159 * 1. the first char of s must be '='.
1160 * 2. if the remainder matches one of the supplied keywords,
1161 * the index (1 based) of the keyword is negated and returned.
1162 * 3. if the remainder is a series of no more than max_vals numbers
1163 * separated by commas, the numbers are saved in vals[] and a
1164 * count of how many were saved is returned. Base10 is assumed,
1165 * and base16 is allowed when prefixed with "0x".
1166 * 4. otherwise, zero is returned.
1167 */
1168 static int __init match_parm (char *s, const char *keywords[], int vals[], int max_vals)
1169 {
1170 static const char *decimal = "0123456789";
1171 static const char *hex = "0123456789abcdef";
1172 int i, n;
1173
1174 if (*s++ == '=') {
1175 /*
1176 * Try matching against the supplied keywords,
1177 * and return -(index+1) if we match one
1178 */
1179 if (keywords != NULL) {
1180 for (i = 0; *keywords != NULL; ++i) {
1181 if (!strcmp(s, *keywords++))
1182 return -(i+1);
1183 }
1184 }
1185 /*
1186 * Look for a series of no more than "max_vals"
1187 * numeric values separated by commas, in base10,
1188 * or base16 when prefixed with "0x".
1189 * Return a count of how many were found.
1190 */
1191 for (n = 0; (i = stridx(decimal, *s)) >= 0;) {
1192 vals[n] = i;
1193 while ((i = stridx(decimal, *++s)) >= 0)
1194 vals[n] = (vals[n] * 10) + i;
1195 if (*s == 'x' && !vals[n]) {
1196 while ((i = stridx(hex, *++s)) >= 0)
1197 vals[n] = (vals[n] * 0x10) + i;
1198 }
1199 if (++n == max_vals)
1200 break;
1201 if (*s == ',' || *s == ';')
1202 ++s;
1203 }
1204 if (!*s)
1205 return n;
1206 }
1207 return 0; /* zero = nothing matched */
1208 }
1209
1210 #ifdef CONFIG_BLK_DEV_ALI14XX
1211 extern int probe_ali14xx;
1212 extern int ali14xx_init(void);
1213 #endif
1214 #ifdef CONFIG_BLK_DEV_UMC8672
1215 extern int probe_umc8672;
1216 extern int umc8672_init(void);
1217 #endif
1218 #ifdef CONFIG_BLK_DEV_DTC2278
1219 extern int probe_dtc2278;
1220 extern int dtc2278_init(void);
1221 #endif
1222 #ifdef CONFIG_BLK_DEV_HT6560B
1223 extern int probe_ht6560b;
1224 extern int ht6560b_init(void);
1225 #endif
1226 #ifdef CONFIG_BLK_DEV_QD65XX
1227 extern int probe_qd65xx;
1228 extern int qd65xx_init(void);
1229 #endif
1230
1231 static int __initdata is_chipset_set[MAX_HWIFS];
1232
1233 /*
1234 * ide_setup() gets called VERY EARLY during initialization,
1235 * to handle kernel "command line" strings beginning with "hdx=" or "ide".
1236 *
1237 * Remember to update Documentation/ide.txt if you change something here.
1238 */
1239 static int __init ide_setup(char *s)
1240 {
1241 int i, vals[3];
1242 ide_hwif_t *hwif;
1243 ide_drive_t *drive;
1244 unsigned int hw, unit;
1245 const char max_drive = 'a' + ((MAX_HWIFS * MAX_DRIVES) - 1);
1246 const char max_hwif = '0' + (MAX_HWIFS - 1);
1247
1248
1249 if (strncmp(s,"hd",2) == 0 && s[2] == '=') /* hd= is for hd.c */
1250 return 0; /* driver and not us */
1251
1252 if (strncmp(s,"ide",3) && strncmp(s,"idebus",6) && strncmp(s,"hd",2))
1253 return 0;
1254
1255 printk(KERN_INFO "ide_setup: %s", s);
1256 init_ide_data ();
1257
1258 #ifdef CONFIG_BLK_DEV_IDEDOUBLER
1259 if (!strcmp(s, "ide=doubler")) {
1260 extern int ide_doubler;
1261
1262 printk(" : Enabled support for IDE doublers\n");
1263 ide_doubler = 1;
1264 return 1;
1265 }
1266 #endif /* CONFIG_BLK_DEV_IDEDOUBLER */
1267
1268 if (!strcmp(s, "ide=nodma")) {
1269 printk(" : Prevented DMA\n");
1270 noautodma = 1;
1271 goto obsolete_option;
1272 }
1273
1274 #ifdef CONFIG_IDEPCI_PCIBUS_ORDER
1275 if (!strcmp(s, "ide=reverse")) {
1276 ide_scan_direction = 1;
1277 printk(" : Enabled support for IDE inverse scan order.\n");
1278 return 1;
1279 }
1280 #endif
1281
1282 #ifdef CONFIG_BLK_DEV_IDEACPI
1283 if (!strcmp(s, "ide=noacpi")) {
1284 //printk(" : Disable IDE ACPI support.\n");
1285 ide_noacpi = 1;
1286 return 1;
1287 }
1288 if (!strcmp(s, "ide=acpigtf")) {
1289 //printk(" : Enable IDE ACPI _GTF support.\n");
1290 ide_noacpitfs = 0;
1291 return 1;
1292 }
1293 if (!strcmp(s, "ide=acpionboot")) {
1294 //printk(" : Call IDE ACPI methods on boot.\n");
1295 ide_noacpionboot = 0;
1296 return 1;
1297 }
1298 #endif /* CONFIG_BLK_DEV_IDEACPI */
1299
1300 /*
1301 * Look for drive options: "hdx="
1302 */
1303 if (s[0] == 'h' && s[1] == 'd' && s[2] >= 'a' && s[2] <= max_drive) {
1304 const char *hd_words[] = {
1305 "none", "noprobe", "nowerr", "cdrom", "nodma",
1306 "autotune", "noautotune", "minus8", "swapdata", "bswap",
1307 "noflush", "remap", "remap63", "scsi", NULL };
1308 unit = s[2] - 'a';
1309 hw = unit / MAX_DRIVES;
1310 unit = unit % MAX_DRIVES;
1311 hwif = &ide_hwifs[hw];
1312 drive = &hwif->drives[unit];
1313 if (strncmp(s + 4, "ide-", 4) == 0) {
1314 strlcpy(drive->driver_req, s + 4, sizeof(drive->driver_req));
1315 goto done;
1316 }
1317 switch (match_parm(&s[3], hd_words, vals, 3)) {
1318 case -1: /* "none" */
1319 case -2: /* "noprobe" */
1320 drive->noprobe = 1;
1321 goto done;
1322 case -3: /* "nowerr" */
1323 drive->bad_wstat = BAD_R_STAT;
1324 hwif->noprobe = 0;
1325 goto done;
1326 case -4: /* "cdrom" */
1327 drive->present = 1;
1328 drive->media = ide_cdrom;
1329 /* an ATAPI device ignores DRDY */
1330 drive->ready_stat = 0;
1331 hwif->noprobe = 0;
1332 goto done;
1333 case -5: /* nodma */
1334 drive->nodma = 1;
1335 goto done;
1336 case -6: /* "autotune" */
1337 drive->autotune = IDE_TUNE_AUTO;
1338 goto obsolete_option;
1339 case -7: /* "noautotune" */
1340 drive->autotune = IDE_TUNE_NOAUTO;
1341 goto obsolete_option;
1342 case -9: /* "swapdata" */
1343 case -10: /* "bswap" */
1344 drive->bswap = 1;
1345 goto done;
1346 case -11: /* noflush */
1347 drive->noflush = 1;
1348 goto done;
1349 case -12: /* "remap" */
1350 drive->remap_0_to_1 = 1;
1351 goto done;
1352 case -13: /* "remap63" */
1353 drive->sect0 = 63;
1354 goto done;
1355 case -14: /* "scsi" */
1356 drive->scsi = 1;
1357 goto done;
1358 case 3: /* cyl,head,sect */
1359 drive->media = ide_disk;
1360 drive->ready_stat = READY_STAT;
1361 drive->cyl = drive->bios_cyl = vals[0];
1362 drive->head = drive->bios_head = vals[1];
1363 drive->sect = drive->bios_sect = vals[2];
1364 drive->present = 1;
1365 drive->forced_geom = 1;
1366 hwif->noprobe = 0;
1367 goto done;
1368 default:
1369 goto bad_option;
1370 }
1371 }
1372
1373 if (s[0] != 'i' || s[1] != 'd' || s[2] != 'e')
1374 goto bad_option;
1375 /*
1376 * Look for bus speed option: "idebus="
1377 */
1378 if (s[3] == 'b' && s[4] == 'u' && s[5] == 's') {
1379 if (match_parm(&s[6], NULL, vals, 1) != 1)
1380 goto bad_option;
1381 if (vals[0] >= 20 && vals[0] <= 66) {
1382 idebus_parameter = vals[0];
1383 } else
1384 printk(" -- BAD BUS SPEED! Expected value from 20 to 66");
1385 goto done;
1386 }
1387 /*
1388 * Look for interface options: "idex="
1389 */
1390 if (s[3] >= '0' && s[3] <= max_hwif) {
1391 /*
1392 * Be VERY CAREFUL changing this: note hardcoded indexes below
1393 * (-8, -9, -10) are reserved to ease the hardcoding.
1394 */
1395 static const char *ide_words[] = {
1396 "noprobe", "serialize", "minus3", "minus4",
1397 "reset", "minus6", "ata66", "minus8", "minus9",
1398 "minus10", "four", "qd65xx", "ht6560b", "cmd640_vlb",
1399 "dtc2278", "umc8672", "ali14xx", NULL };
1400 hw = s[3] - '0';
1401 hwif = &ide_hwifs[hw];
1402 i = match_parm(&s[4], ide_words, vals, 3);
1403
1404 /*
1405 * Cryptic check to ensure chipset not already set for hwif.
1406 * Note: we can't depend on hwif->chipset here.
1407 */
1408 if ((i >= -18 && i <= -11) || (i > 0 && i <= 3)) {
1409 /* chipset already specified */
1410 if (is_chipset_set[hw])
1411 goto bad_option;
1412 if (i > -18 && i <= -11) {
1413 /* these drivers are for "ide0=" only */
1414 if (hw != 0)
1415 goto bad_hwif;
1416 /* chipset already specified for 2nd port */
1417 if (is_chipset_set[hw+1])
1418 goto bad_option;
1419 }
1420 is_chipset_set[hw] = 1;
1421 printk("\n");
1422 }
1423
1424 switch (i) {
1425 #ifdef CONFIG_BLK_DEV_ALI14XX
1426 case -17: /* "ali14xx" */
1427 probe_ali14xx = 1;
1428 goto done;
1429 #endif
1430 #ifdef CONFIG_BLK_DEV_UMC8672
1431 case -16: /* "umc8672" */
1432 probe_umc8672 = 1;
1433 goto done;
1434 #endif
1435 #ifdef CONFIG_BLK_DEV_DTC2278
1436 case -15: /* "dtc2278" */
1437 probe_dtc2278 = 1;
1438 goto done;
1439 #endif
1440 #ifdef CONFIG_BLK_DEV_CMD640
1441 case -14: /* "cmd640_vlb" */
1442 {
1443 extern int cmd640_vlb; /* flag for cmd640.c */
1444 cmd640_vlb = 1;
1445 goto done;
1446 }
1447 #endif
1448 #ifdef CONFIG_BLK_DEV_HT6560B
1449 case -13: /* "ht6560b" */
1450 probe_ht6560b = 1;
1451 goto done;
1452 #endif
1453 #ifdef CONFIG_BLK_DEV_QD65XX
1454 case -12: /* "qd65xx" */
1455 probe_qd65xx = 1;
1456 goto done;
1457 #endif
1458 #ifdef CONFIG_BLK_DEV_4DRIVES
1459 case -11: /* "four" drives on one set of ports */
1460 {
1461 ide_hwif_t *mate = &ide_hwifs[hw^1];
1462 mate->drives[0].select.all ^= 0x20;
1463 mate->drives[1].select.all ^= 0x20;
1464 hwif->chipset = mate->chipset = ide_4drives;
1465 mate->irq = hwif->irq;
1466 memcpy(mate->io_ports, hwif->io_ports, sizeof(hwif->io_ports));
1467 hwif->mate = mate;
1468 mate->mate = hwif;
1469 hwif->serialized = mate->serialized = 1;
1470 goto obsolete_option;
1471 }
1472 #endif /* CONFIG_BLK_DEV_4DRIVES */
1473 case -10: /* minus10 */
1474 case -9: /* minus9 */
1475 case -8: /* minus8 */
1476 case -6:
1477 case -4:
1478 case -3:
1479 goto bad_option;
1480 case -7: /* ata66 */
1481 #ifdef CONFIG_BLK_DEV_IDEPCI
1482 /*
1483 * Use ATA_CBL_PATA40_SHORT so drive side
1484 * cable detection is also overriden.
1485 */
1486 hwif->cbl = ATA_CBL_PATA40_SHORT;
1487 goto obsolete_option;
1488 #else
1489 goto bad_hwif;
1490 #endif
1491 case -5: /* "reset" */
1492 hwif->reset = 1;
1493 goto obsolete_option;
1494 case -2: /* "serialize" */
1495 hwif->mate = &ide_hwifs[hw^1];
1496 hwif->mate->mate = hwif;
1497 hwif->serialized = hwif->mate->serialized = 1;
1498 goto obsolete_option;
1499
1500 case -1: /* "noprobe" */
1501 hwif->noprobe = 1;
1502 goto done;
1503
1504 case 1: /* base */
1505 vals[1] = vals[0] + 0x206; /* default ctl */
1506 case 2: /* base,ctl */
1507 vals[2] = 0; /* default irq = probe for it */
1508 case 3: /* base,ctl,irq */
1509 hwif->hw.irq = vals[2];
1510 ide_init_hwif_ports(&hwif->hw, (unsigned long) vals[0], (unsigned long) vals[1], &hwif->irq);
1511 memcpy(hwif->io_ports, hwif->hw.io_ports, sizeof(hwif->io_ports));
1512 hwif->irq = vals[2];
1513 hwif->noprobe = 0;
1514 hwif->chipset = ide_forced;
1515 goto obsolete_option;
1516
1517 case 0: goto bad_option;
1518 default:
1519 printk(" -- SUPPORT NOT CONFIGURED IN THIS KERNEL\n");
1520 return 1;
1521 }
1522 }
1523 bad_option:
1524 printk(" -- BAD OPTION\n");
1525 return 1;
1526 obsolete_option:
1527 printk(" -- OBSOLETE OPTION, WILL BE REMOVED SOON!\n");
1528 return 1;
1529 bad_hwif:
1530 printk("-- NOT SUPPORTED ON ide%d", hw);
1531 done:
1532 printk("\n");
1533 return 1;
1534 }
1535
1536 extern void __init pnpide_init(void);
1537 extern void __exit pnpide_exit(void);
1538 extern void __init h8300_ide_init(void);
1539
1540 /*
1541 * probe_for_hwifs() finds/initializes "known" IDE interfaces
1542 */
1543 static void __init probe_for_hwifs (void)
1544 {
1545 #ifdef CONFIG_IDEPCI_PCIBUS_ORDER
1546 ide_scan_pcibus(ide_scan_direction);
1547 #endif
1548
1549 #ifdef CONFIG_ETRAX_IDE
1550 {
1551 extern void init_e100_ide(void);
1552 init_e100_ide();
1553 }
1554 #endif /* CONFIG_ETRAX_IDE */
1555 #ifdef CONFIG_BLK_DEV_CMD640
1556 {
1557 extern void ide_probe_for_cmd640x(void);
1558 ide_probe_for_cmd640x();
1559 }
1560 #endif /* CONFIG_BLK_DEV_CMD640 */
1561 #ifdef CONFIG_BLK_DEV_IDE_PMAC
1562 {
1563 extern int pmac_ide_probe(void);
1564 (void)pmac_ide_probe();
1565 }
1566 #endif /* CONFIG_BLK_DEV_IDE_PMAC */
1567 #ifdef CONFIG_BLK_DEV_GAYLE
1568 {
1569 extern void gayle_init(void);
1570 gayle_init();
1571 }
1572 #endif /* CONFIG_BLK_DEV_GAYLE */
1573 #ifdef CONFIG_BLK_DEV_FALCON_IDE
1574 {
1575 extern void falconide_init(void);
1576 falconide_init();
1577 }
1578 #endif /* CONFIG_BLK_DEV_FALCON_IDE */
1579 #ifdef CONFIG_BLK_DEV_MAC_IDE
1580 {
1581 extern void macide_init(void);
1582 macide_init();
1583 }
1584 #endif /* CONFIG_BLK_DEV_MAC_IDE */
1585 #ifdef CONFIG_BLK_DEV_Q40IDE
1586 {
1587 extern void q40ide_init(void);
1588 q40ide_init();
1589 }
1590 #endif /* CONFIG_BLK_DEV_Q40IDE */
1591 #ifdef CONFIG_BLK_DEV_BUDDHA
1592 {
1593 extern void buddha_init(void);
1594 buddha_init();
1595 }
1596 #endif /* CONFIG_BLK_DEV_BUDDHA */
1597 #ifdef CONFIG_BLK_DEV_IDEPNP
1598 pnpide_init();
1599 #endif
1600 #ifdef CONFIG_H8300
1601 h8300_ide_init();
1602 #endif
1603 }
1604
1605 /*
1606 * Probe module
1607 */
1608
1609 EXPORT_SYMBOL(ide_lock);
1610
1611 static int ide_bus_match(struct device *dev, struct device_driver *drv)
1612 {
1613 return 1;
1614 }
1615
1616 static char *media_string(ide_drive_t *drive)
1617 {
1618 switch (drive->media) {
1619 case ide_disk:
1620 return "disk";
1621 case ide_cdrom:
1622 return "cdrom";
1623 case ide_tape:
1624 return "tape";
1625 case ide_floppy:
1626 return "floppy";
1627 case ide_optical:
1628 return "optical";
1629 default:
1630 return "UNKNOWN";
1631 }
1632 }
1633
1634 static ssize_t media_show(struct device *dev, struct device_attribute *attr, char *buf)
1635 {
1636 ide_drive_t *drive = to_ide_device(dev);
1637 return sprintf(buf, "%s\n", media_string(drive));
1638 }
1639
1640 static ssize_t drivename_show(struct device *dev, struct device_attribute *attr, char *buf)
1641 {
1642 ide_drive_t *drive = to_ide_device(dev);
1643 return sprintf(buf, "%s\n", drive->name);
1644 }
1645
1646 static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf)
1647 {
1648 ide_drive_t *drive = to_ide_device(dev);
1649 return sprintf(buf, "ide:m-%s\n", media_string(drive));
1650 }
1651
1652 static struct device_attribute ide_dev_attrs[] = {
1653 __ATTR_RO(media),
1654 __ATTR_RO(drivename),
1655 __ATTR_RO(modalias),
1656 __ATTR_NULL
1657 };
1658
1659 static int ide_uevent(struct device *dev, struct kobj_uevent_env *env)
1660 {
1661 ide_drive_t *drive = to_ide_device(dev);
1662
1663 add_uevent_var(env, "MEDIA=%s", media_string(drive));
1664 add_uevent_var(env, "DRIVENAME=%s", drive->name);
1665 add_uevent_var(env, "MODALIAS=ide:m-%s", media_string(drive));
1666 return 0;
1667 }
1668
1669 static int generic_ide_probe(struct device *dev)
1670 {
1671 ide_drive_t *drive = to_ide_device(dev);
1672 ide_driver_t *drv = to_ide_driver(dev->driver);
1673
1674 return drv->probe ? drv->probe(drive) : -ENODEV;
1675 }
1676
1677 static int generic_ide_remove(struct device *dev)
1678 {
1679 ide_drive_t *drive = to_ide_device(dev);
1680 ide_driver_t *drv = to_ide_driver(dev->driver);
1681
1682 if (drv->remove)
1683 drv->remove(drive);
1684
1685 return 0;
1686 }
1687
1688 static void generic_ide_shutdown(struct device *dev)
1689 {
1690 ide_drive_t *drive = to_ide_device(dev);
1691 ide_driver_t *drv = to_ide_driver(dev->driver);
1692
1693 if (dev->driver && drv->shutdown)
1694 drv->shutdown(drive);
1695 }
1696
1697 struct bus_type ide_bus_type = {
1698 .name = "ide",
1699 .match = ide_bus_match,
1700 .uevent = ide_uevent,
1701 .probe = generic_ide_probe,
1702 .remove = generic_ide_remove,
1703 .shutdown = generic_ide_shutdown,
1704 .dev_attrs = ide_dev_attrs,
1705 .suspend = generic_ide_suspend,
1706 .resume = generic_ide_resume,
1707 };
1708
1709 EXPORT_SYMBOL_GPL(ide_bus_type);
1710
1711 /*
1712 * This is gets invoked once during initialization, to set *everything* up
1713 */
1714 static int __init ide_init(void)
1715 {
1716 int ret;
1717
1718 printk(KERN_INFO "Uniform Multi-Platform E-IDE driver " REVISION "\n");
1719 system_bus_speed = ide_system_bus_speed();
1720
1721 ret = bus_register(&ide_bus_type);
1722 if (ret < 0) {
1723 printk(KERN_WARNING "IDE: bus_register error: %d\n", ret);
1724 return ret;
1725 }
1726
1727 init_ide_data();
1728
1729 proc_ide_create();
1730
1731 #ifdef CONFIG_BLK_DEV_ALI14XX
1732 if (probe_ali14xx)
1733 (void)ali14xx_init();
1734 #endif
1735 #ifdef CONFIG_BLK_DEV_UMC8672
1736 if (probe_umc8672)
1737 (void)umc8672_init();
1738 #endif
1739 #ifdef CONFIG_BLK_DEV_DTC2278
1740 if (probe_dtc2278)
1741 (void)dtc2278_init();
1742 #endif
1743 #ifdef CONFIG_BLK_DEV_HT6560B
1744 if (probe_ht6560b)
1745 (void)ht6560b_init();
1746 #endif
1747 #ifdef CONFIG_BLK_DEV_QD65XX
1748 if (probe_qd65xx)
1749 (void)qd65xx_init();
1750 #endif
1751
1752 /* Probe for special PCI and other "known" interface chipsets. */
1753 probe_for_hwifs();
1754
1755 return 0;
1756 }
1757
1758 #ifdef MODULE
1759 static char *options = NULL;
1760 module_param(options, charp, 0);
1761 MODULE_LICENSE("GPL");
1762
1763 static void __init parse_options (char *line)
1764 {
1765 char *next = line;
1766
1767 if (line == NULL || !*line)
1768 return;
1769 while ((line = next) != NULL) {
1770 if ((next = strchr(line,' ')) != NULL)
1771 *next++ = 0;
1772 if (!ide_setup(line))
1773 printk (KERN_INFO "Unknown option '%s'\n", line);
1774 }
1775 }
1776
1777 int __init init_module (void)
1778 {
1779 parse_options(options);
1780 return ide_init();
1781 }
1782
1783 void __exit cleanup_module (void)
1784 {
1785 int index;
1786
1787 for (index = 0; index < MAX_HWIFS; ++index)
1788 ide_unregister(index);
1789
1790 #ifdef CONFIG_BLK_DEV_IDEPNP
1791 pnpide_exit();
1792 #endif
1793
1794 proc_ide_destroy();
1795
1796 bus_unregister(&ide_bus_type);
1797 }
1798
1799 #else /* !MODULE */
1800
1801 __setup("", ide_setup);
1802
1803 module_init(ide_init);
1804
1805 #endif /* MODULE */
(deprecated) Btrfs devel tree