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Merge git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6
[wrt350n-kernel.git] / drivers / ide / ide.c
blobb83dc7b664aea7fd657f823b2d6d228a4712a955
1 /*
2 * Copyright (C) 1994-1998 Linus Torvalds & authors (see below)
3 * Copyrifht (C) 2003-2005, 2007 Bartlomiej Zolnierkiewicz
4 */
5
6 /*
7 * Mostly written by Mark Lord <mlord@pobox.com>
8 * and Gadi Oxman <gadio@netvision.net.il>
9 * and Andre Hedrick <andre@linux-ide.org>
10 *
11 * See linux/MAINTAINERS for address of current maintainer.
12 *
13 * This is the multiple IDE interface driver, as evolved from hd.c.
14 * It supports up to MAX_HWIFS IDE interfaces, on one or more IRQs
15 * (usually 14 & 15).
16 * There can be up to two drives per interface, as per the ATA-2 spec.
17 *
18 * ...
19 *
20 * From hd.c:
21 * |
22 * | It traverses the request-list, using interrupts to jump between functions.
23 * | As nearly all functions can be called within interrupts, we may not sleep.
24 * | Special care is recommended. Have Fun!
25 * |
26 * | modified by Drew Eckhardt to check nr of hd's from the CMOS.
27 * |
28 * | Thanks to Branko Lankester, lankeste@fwi.uva.nl, who found a bug
29 * | in the early extended-partition checks and added DM partitions.
30 * |
31 * | Early work on error handling by Mika Liljeberg (liljeber@cs.Helsinki.FI).
32 * |
33 * | IRQ-unmask, drive-id, multiple-mode, support for ">16 heads",
34 * | and general streamlining by Mark Lord (mlord@pobox.com).
35 *
36 * October, 1994 -- Complete line-by-line overhaul for linux 1.1.x, by:
37 *
38 * Mark Lord (mlord@pobox.com) (IDE Perf.Pkg)
39 * Delman Lee (delman@ieee.org) ("Mr. atdisk2")
40 * Scott Snyder (snyder@fnald0.fnal.gov) (ATAPI IDE cd-rom)
41 *
42 * This was a rewrite of just about everything from hd.c, though some original
43 * code is still sprinkled about. Think of it as a major evolution, with
44 * inspiration from lots of linux users, esp. hamish@zot.apana.org.au
45 */
46
47 #define _IDE_C /* Tell ide.h it's really us */
48
49 #include <linux/module.h>
50 #include <linux/types.h>
51 #include <linux/string.h>
52 #include <linux/kernel.h>
53 #include <linux/timer.h>
54 #include <linux/mm.h>
55 #include <linux/interrupt.h>
56 #include <linux/major.h>
57 #include <linux/errno.h>
58 #include <linux/genhd.h>
59 #include <linux/blkpg.h>
60 #include <linux/slab.h>
61 #include <linux/init.h>
62 #include <linux/pci.h>
63 #include <linux/delay.h>
64 #include <linux/ide.h>
65 #include <linux/completion.h>
66 #include <linux/reboot.h>
67 #include <linux/cdrom.h>
68 #include <linux/seq_file.h>
69 #include <linux/device.h>
70 #include <linux/bitops.h>
71
72 #include <asm/byteorder.h>
73 #include <asm/irq.h>
74 #include <asm/uaccess.h>
75 #include <asm/io.h>
76
77
78 /* default maximum number of failures */
79 #define IDE_DEFAULT_MAX_FAILURES 1
80
81 static const u8 ide_hwif_to_major[] = { IDE0_MAJOR, IDE1_MAJOR,
82 IDE2_MAJOR, IDE3_MAJOR,
83 IDE4_MAJOR, IDE5_MAJOR,
84 IDE6_MAJOR, IDE7_MAJOR,
85 IDE8_MAJOR, IDE9_MAJOR };
86
87 static int idebus_parameter; /* holds the "idebus=" parameter */
88 static int system_bus_speed; /* holds what we think is VESA/PCI bus speed */
89
90 DEFINE_MUTEX(ide_cfg_mtx);
91 __cacheline_aligned_in_smp DEFINE_SPINLOCK(ide_lock);
92
93 #ifdef CONFIG_IDEPCI_PCIBUS_ORDER
94 int ide_scan_direction; /* THIS was formerly 2.2.x pci=reverse */
95 #endif
96
97 int noautodma = 0;
98
99 #ifdef CONFIG_BLK_DEV_IDEACPI
100 int ide_noacpi = 0;
101 int ide_noacpitfs = 1;
102 int ide_noacpionboot = 1;
103 #endif
104
105 /*
106 * This is declared extern in ide.h, for access by other IDE modules:
107 */
108 ide_hwif_t ide_hwifs[MAX_HWIFS]; /* master data repository */
109
110 EXPORT_SYMBOL(ide_hwifs);
111
112 /*
113 * Do not even *think* about calling this!
114 */
115 void ide_init_port_data(ide_hwif_t *hwif, unsigned int index)
116 {
117 unsigned int unit;
118
119 /* bulk initialize hwif & drive info with zeros */
120 memset(hwif, 0, sizeof(ide_hwif_t));
121
122 /* fill in any non-zero initial values */
123 hwif->index = index;
124 hwif->major = ide_hwif_to_major[index];
125
126 hwif->name[0] = 'i';
127 hwif->name[1] = 'd';
128 hwif->name[2] = 'e';
129 hwif->name[3] = '0' + index;
130
131 hwif->bus_state = BUSSTATE_ON;
132
133 init_completion(&hwif->gendev_rel_comp);
134
135 default_hwif_iops(hwif);
136 default_hwif_transport(hwif);
137 for (unit = 0; unit < MAX_DRIVES; ++unit) {
138 ide_drive_t *drive = &hwif->drives[unit];
139
140 drive->media = ide_disk;
141 drive->select.all = (unit<<4)|0xa0;
142 drive->hwif = hwif;
143 drive->ctl = 0x08;
144 drive->ready_stat = READY_STAT;
145 drive->bad_wstat = BAD_W_STAT;
146 drive->special.b.recalibrate = 1;
147 drive->special.b.set_geometry = 1;
148 drive->name[0] = 'h';
149 drive->name[1] = 'd';
150 drive->name[2] = 'a' + (index * MAX_DRIVES) + unit;
151 drive->max_failures = IDE_DEFAULT_MAX_FAILURES;
152 drive->using_dma = 0;
153 drive->vdma = 0;
154 INIT_LIST_HEAD(&drive->list);
155 init_completion(&drive->gendev_rel_comp);
156 }
157 }
158 EXPORT_SYMBOL_GPL(ide_init_port_data);
159
160 static void init_hwif_default(ide_hwif_t *hwif, unsigned int index)
161 {
162 hw_regs_t hw;
163
164 memset(&hw, 0, sizeof(hw_regs_t));
165
166 ide_init_hwif_ports(&hw, ide_default_io_base(index), 0, &hwif->irq);
167
168 memcpy(hwif->io_ports, hw.io_ports, sizeof(hw.io_ports));
169
170 hwif->noprobe = !hwif->io_ports[IDE_DATA_OFFSET];
171 #ifdef CONFIG_BLK_DEV_HD
172 if (hwif->io_ports[IDE_DATA_OFFSET] == HD_DATA)
173 hwif->noprobe = 1; /* may be overridden by ide_setup() */
174 #endif
175 }
176
177 /*
178 * init_ide_data() sets reasonable default values into all fields
179 * of all instances of the hwifs and drives, but only on the first call.
180 * Subsequent calls have no effect (they don't wipe out anything).
181 *
182 * This routine is normally called at driver initialization time,
183 * but may also be called MUCH earlier during kernel "command-line"
184 * parameter processing. As such, we cannot depend on any other parts
185 * of the kernel (such as memory allocation) to be functioning yet.
186 *
187 * This is too bad, as otherwise we could dynamically allocate the
188 * ide_drive_t structs as needed, rather than always consuming memory
189 * for the max possible number (MAX_HWIFS * MAX_DRIVES) of them.
190 *
191 * FIXME: We should stuff the setup data into __init and copy the
192 * relevant hwifs/allocate them properly during boot.
193 */
194 #define MAGIC_COOKIE 0x12345678
195 static void __init init_ide_data (void)
196 {
197 ide_hwif_t *hwif;
198 unsigned int index;
199 static unsigned long magic_cookie = MAGIC_COOKIE;
200
201 if (magic_cookie != MAGIC_COOKIE)
202 return; /* already initialized */
203 magic_cookie = 0;
204
205 /* Initialise all interface structures */
206 for (index = 0; index < MAX_HWIFS; ++index) {
207 hwif = &ide_hwifs[index];
208 ide_init_port_data(hwif, index);
209 init_hwif_default(hwif, index);
210 #if !defined(CONFIG_PPC32) || !defined(CONFIG_PCI)
211 hwif->irq =
212 ide_init_default_irq(hwif->io_ports[IDE_DATA_OFFSET]);
213 #endif
214 }
215 }
216
217 /**
218 * ide_system_bus_speed - guess bus speed
219 *
220 * ide_system_bus_speed() returns what we think is the system VESA/PCI
221 * bus speed (in MHz). This is used for calculating interface PIO timings.
222 * The default is 40 for known PCI systems, 50 otherwise.
223 * The "idebus=xx" parameter can be used to override this value.
224 * The actual value to be used is computed/displayed the first time
225 * through. Drivers should only use this as a last resort.
226 *
227 * Returns a guessed speed in MHz.
228 */
229
230 static int ide_system_bus_speed(void)
231 {
232 #ifdef CONFIG_PCI
233 static struct pci_device_id pci_default[] = {
234 { PCI_DEVICE(PCI_ANY_ID, PCI_ANY_ID) },
235 { }
236 };
237 #else
238 #define pci_default 0
239 #endif /* CONFIG_PCI */
240
241 /* user supplied value */
242 if (idebus_parameter)
243 return idebus_parameter;
244
245 /* safe default value for PCI or VESA and PCI*/
246 return pci_dev_present(pci_default) ? 33 : 50;
247 }
248
249 ide_hwif_t * ide_find_port(unsigned long base)
250 {
251 ide_hwif_t *hwif;
252 int i;
253
254 for (i = 0; i < MAX_HWIFS; i++) {
255 hwif = &ide_hwifs[i];
256 if (hwif->io_ports[IDE_DATA_OFFSET] == base)
257 goto found;
258 }
259
260 for (i = 0; i < MAX_HWIFS; i++) {
261 hwif = &ide_hwifs[i];
262 if (hwif->io_ports[IDE_DATA_OFFSET] == 0)
263 goto found;
264 }
265
266 hwif = NULL;
267 found:
268 return hwif;
269 }
270
271 EXPORT_SYMBOL_GPL(ide_find_port);
272
273 static struct resource* hwif_request_region(ide_hwif_t *hwif,
274 unsigned long addr, int num)
275 {
276 struct resource *res = request_region(addr, num, hwif->name);
277
278 if (!res)
279 printk(KERN_ERR "%s: I/O resource 0x%lX-0x%lX not free.\n",
280 hwif->name, addr, addr+num-1);
281 return res;
282 }
283
284 /**
285 * ide_hwif_request_regions - request resources for IDE
286 * @hwif: interface to use
287 *
288 * Requests all the needed resources for an interface.
289 * Right now core IDE code does this work which is deeply wrong.
290 * MMIO leaves it to the controller driver,
291 * PIO will migrate this way over time.
292 */
293
294 int ide_hwif_request_regions(ide_hwif_t *hwif)
295 {
296 unsigned long addr;
297 unsigned int i;
298
299 if (hwif->mmio)
300 return 0;
301 addr = hwif->io_ports[IDE_CONTROL_OFFSET];
302 if (addr && !hwif_request_region(hwif, addr, 1))
303 goto control_region_busy;
304 hwif->straight8 = 0;
305 addr = hwif->io_ports[IDE_DATA_OFFSET];
306 if ((addr | 7) == hwif->io_ports[IDE_STATUS_OFFSET]) {
307 if (!hwif_request_region(hwif, addr, 8))
308 goto data_region_busy;
309 hwif->straight8 = 1;
310 return 0;
311 }
312 for (i = IDE_DATA_OFFSET; i <= IDE_STATUS_OFFSET; i++) {
313 addr = hwif->io_ports[i];
314 if (!hwif_request_region(hwif, addr, 1)) {
315 while (--i)
316 release_region(addr, 1);
317 goto data_region_busy;
318 }
319 }
320 return 0;
321
322 data_region_busy:
323 addr = hwif->io_ports[IDE_CONTROL_OFFSET];
324 if (addr)
325 release_region(addr, 1);
326 control_region_busy:
327 /* If any errors are return, we drop the hwif interface. */
328 return -EBUSY;
329 }
330
331 /**
332 * ide_hwif_release_regions - free IDE resources
333 *
334 * Note that we only release the standard ports,
335 * and do not even try to handle any extra ports
336 * allocated for weird IDE interface chipsets.
337 *
338 * Note also that we don't yet handle mmio resources here. More
339 * importantly our caller should be doing this so we need to
340 * restructure this as a helper function for drivers.
341 */
342
343 void ide_hwif_release_regions(ide_hwif_t *hwif)
344 {
345 u32 i = 0;
346
347 if (hwif->mmio)
348 return;
349 if (hwif->io_ports[IDE_CONTROL_OFFSET])
350 release_region(hwif->io_ports[IDE_CONTROL_OFFSET], 1);
351 if (hwif->straight8) {
352 release_region(hwif->io_ports[IDE_DATA_OFFSET], 8);
353 return;
354 }
355 for (i = IDE_DATA_OFFSET; i <= IDE_STATUS_OFFSET; i++)
356 if (hwif->io_ports[i])
357 release_region(hwif->io_ports[i], 1);
358 }
359
360 /**
361 * ide_hwif_restore - restore hwif to template
362 * @hwif: hwif to update
363 * @tmp_hwif: template
364 *
365 * Restore hwif to a previous state by copying most settings
366 * from the template.
367 */
368
369 static void ide_hwif_restore(ide_hwif_t *hwif, ide_hwif_t *tmp_hwif)
370 {
371 hwif->hwgroup = tmp_hwif->hwgroup;
372
373 hwif->gendev.parent = tmp_hwif->gendev.parent;
374
375 hwif->proc = tmp_hwif->proc;
376
377 hwif->major = tmp_hwif->major;
378 hwif->straight8 = tmp_hwif->straight8;
379 hwif->bus_state = tmp_hwif->bus_state;
380
381 hwif->host_flags = tmp_hwif->host_flags;
382
383 hwif->pio_mask = tmp_hwif->pio_mask;
384
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
389 hwif->cbl = tmp_hwif->cbl;
390
391 hwif->chipset = tmp_hwif->chipset;
392 hwif->hold = tmp_hwif->hold;
393
394 hwif->dev = tmp_hwif->dev;
395
396 #ifdef CONFIG_BLK_DEV_IDEPCI
397 hwif->cds = tmp_hwif->cds;
398 #endif
399
400 hwif->set_pio_mode = tmp_hwif->set_pio_mode;
401 hwif->set_dma_mode = tmp_hwif->set_dma_mode;
402 hwif->mdma_filter = tmp_hwif->mdma_filter;
403 hwif->udma_filter = tmp_hwif->udma_filter;
404 hwif->selectproc = tmp_hwif->selectproc;
405 hwif->reset_poll = tmp_hwif->reset_poll;
406 hwif->pre_reset = tmp_hwif->pre_reset;
407 hwif->resetproc = tmp_hwif->resetproc;
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_host_set = tmp_hwif->dma_host_set;
418 hwif->dma_setup = tmp_hwif->dma_setup;
419 hwif->dma_exec_cmd = tmp_hwif->dma_exec_cmd;
420 hwif->dma_start = tmp_hwif->dma_start;
421 hwif->ide_dma_end = tmp_hwif->ide_dma_end;
422 hwif->ide_dma_test_irq = tmp_hwif->ide_dma_test_irq;
423 hwif->ide_dma_clear_irq = tmp_hwif->ide_dma_clear_irq;
424 hwif->dma_lost_irq = tmp_hwif->dma_lost_irq;
425 hwif->dma_timeout = tmp_hwif->dma_timeout;
426
427 hwif->OUTB = tmp_hwif->OUTB;
428 hwif->OUTBSYNC = tmp_hwif->OUTBSYNC;
429 hwif->OUTW = tmp_hwif->OUTW;
430 hwif->OUTSW = tmp_hwif->OUTSW;
431 hwif->OUTSL = tmp_hwif->OUTSL;
432
433 hwif->INB = tmp_hwif->INB;
434 hwif->INW = tmp_hwif->INW;
435 hwif->INSW = tmp_hwif->INSW;
436 hwif->INSL = tmp_hwif->INSL;
437
438 hwif->sg_max_nents = tmp_hwif->sg_max_nents;
439
440 hwif->mmio = tmp_hwif->mmio;
441 hwif->rqsize = tmp_hwif->rqsize;
442
443 #ifndef CONFIG_BLK_DEV_IDECS
444 hwif->irq = tmp_hwif->irq;
445 #endif
446
447 hwif->dma_base = tmp_hwif->dma_base;
448 hwif->dma_command = tmp_hwif->dma_command;
449 hwif->dma_vendor1 = tmp_hwif->dma_vendor1;
450 hwif->dma_status = tmp_hwif->dma_status;
451 hwif->dma_vendor3 = tmp_hwif->dma_vendor3;
452 hwif->dma_prdtable = tmp_hwif->dma_prdtable;
453
454 hwif->config_data = tmp_hwif->config_data;
455 hwif->select_data = tmp_hwif->select_data;
456 hwif->extra_base = tmp_hwif->extra_base;
457 hwif->extra_ports = tmp_hwif->extra_ports;
458
459 hwif->hwif_data = tmp_hwif->hwif_data;
460 }
461
462 void ide_remove_port_from_hwgroup(ide_hwif_t *hwif)
463 {
464 ide_hwgroup_t *hwgroup = hwif->hwgroup;
465
466 spin_lock_irq(&ide_lock);
467 /*
468 * Remove us from the hwgroup, and free
469 * the hwgroup if we were the only member
470 */
471 if (hwif->next == hwif) {
472 BUG_ON(hwgroup->hwif != hwif);
473 kfree(hwgroup);
474 } else {
475 /* There is another interface in hwgroup.
476 * Unlink us, and set hwgroup->drive and ->hwif to
477 * something sane.
478 */
479 ide_hwif_t *g = hwgroup->hwif;
480
481 while (g->next != hwif)
482 g = g->next;
483 g->next = hwif->next;
484 if (hwgroup->hwif == hwif) {
485 /* Chose a random hwif for hwgroup->hwif.
486 * It's guaranteed that there are no drives
487 * left in the hwgroup.
488 */
489 BUG_ON(hwgroup->drive != NULL);
490 hwgroup->hwif = g;
491 }
492 BUG_ON(hwgroup->hwif == hwif);
493 }
494 spin_unlock_irq(&ide_lock);
495 }
496
497 /**
498 * ide_unregister - free an IDE interface
499 * @index: index of interface (will change soon to a pointer)
500 * @init_default: init default hwif flag
501 * @restore: restore hwif flag
502 *
503 * Perform the final unregister of an IDE interface. At the moment
504 * we don't refcount interfaces so this will also get split up.
505 *
506 * Locking:
507 * The caller must not hold the IDE locks
508 * The drive present/vanishing is not yet properly locked
509 * Take care with the callbacks. These have been split to avoid
510 * deadlocking the IDE layer. The shutdown callback is called
511 * before we take the lock and free resources. It is up to the
512 * caller to be sure there is no pending I/O here, and that
513 * the interface will not be reopened (present/vanishing locking
514 * isn't yet done BTW). After we commit to the final kill we
515 * call the cleanup callback with the ide locks held.
516 *
517 * Unregister restores the hwif structures to the default state.
518 * This is raving bonkers.
519 */
520
521 void ide_unregister(unsigned int index, int init_default, int restore)
522 {
523 ide_drive_t *drive;
524 ide_hwif_t *hwif, *g;
525 static ide_hwif_t tmp_hwif; /* protected by ide_cfg_mtx */
526 ide_hwgroup_t *hwgroup;
527 int irq_count = 0, unit;
528
529 BUG_ON(index >= MAX_HWIFS);
530
531 BUG_ON(in_interrupt());
532 BUG_ON(irqs_disabled());
533 mutex_lock(&ide_cfg_mtx);
534 spin_lock_irq(&ide_lock);
535 hwif = &ide_hwifs[index];
536 if (!hwif->present)
537 goto abort;
538 for (unit = 0; unit < MAX_DRIVES; ++unit) {
539 drive = &hwif->drives[unit];
540 if (!drive->present)
541 continue;
542 spin_unlock_irq(&ide_lock);
543 device_unregister(&drive->gendev);
544 wait_for_completion(&drive->gendev_rel_comp);
545 spin_lock_irq(&ide_lock);
546 }
547 hwif->present = 0;
548
549 spin_unlock_irq(&ide_lock);
550
551 ide_proc_unregister_port(hwif);
552
553 hwgroup = hwif->hwgroup;
554 /*
555 * free the irq if we were the only hwif using it
556 */
557 g = hwgroup->hwif;
558 do {
559 if (g->irq == hwif->irq)
560 ++irq_count;
561 g = g->next;
562 } while (g != hwgroup->hwif);
563 if (irq_count == 1)
564 free_irq(hwif->irq, hwgroup);
565
566 ide_remove_port_from_hwgroup(hwif);
567
568 device_unregister(&hwif->gendev);
569 wait_for_completion(&hwif->gendev_rel_comp);
570
571 /*
572 * Remove us from the kernel's knowledge
573 */
574 blk_unregister_region(MKDEV(hwif->major, 0), MAX_DRIVES<<PARTN_BITS);
575 kfree(hwif->sg_table);
576 unregister_blkdev(hwif->major, hwif->name);
577 spin_lock_irq(&ide_lock);
578
579 if (hwif->dma_base) {
580 (void) ide_release_dma(hwif);
581
582 hwif->dma_base = 0;
583 hwif->dma_command = 0;
584 hwif->dma_vendor1 = 0;
585 hwif->dma_status = 0;
586 hwif->dma_vendor3 = 0;
587 hwif->dma_prdtable = 0;
588
589 hwif->extra_base = 0;
590 hwif->extra_ports = 0;
591 }
592
593 <<<<<<< HEAD:drivers/ide/ide.c
594 /*
595 * Note that we only release the standard ports,
596 * and do not even try to handle any extra ports
597 * allocated for weird IDE interface chipsets.
598 */
599 =======
600 >>>>>>> 264e3e889d86e552b4191d69bb60f4f3b383135a:drivers/ide/ide.c
601 ide_hwif_release_regions(hwif);
602
603 /* copy original settings */
604 tmp_hwif = *hwif;
605
606 /* restore hwif data to pristine status */
607 ide_init_port_data(hwif, index);
608
609 if (init_default)
610 init_hwif_default(hwif, index);
611
612 if (restore)
613 ide_hwif_restore(hwif, &tmp_hwif);
614
615 abort:
616 spin_unlock_irq(&ide_lock);
617 mutex_unlock(&ide_cfg_mtx);
618 }
619
620 EXPORT_SYMBOL(ide_unregister);
621
622 void ide_init_port_hw(ide_hwif_t *hwif, hw_regs_t *hw)
623 {
624 memcpy(hwif->io_ports, hw->io_ports, sizeof(hwif->io_ports));
625 hwif->irq = hw->irq;
626 hwif->noprobe = 0;
627 hwif->chipset = hw->chipset;
628 hwif->gendev.parent = hw->dev;
629 hwif->ack_intr = hw->ack_intr;
630 }
631 EXPORT_SYMBOL_GPL(ide_init_port_hw);
632
633 ide_hwif_t *ide_deprecated_find_port(unsigned long base)
634 {
635 ide_hwif_t *hwif;
636 int i;
637
638 for (i = 0; i < MAX_HWIFS; i++) {
639 hwif = &ide_hwifs[i];
640 if (hwif->io_ports[IDE_DATA_OFFSET] == base)
641 goto found;
642 }
643
644 for (i = 0; i < MAX_HWIFS; i++) {
645 hwif = &ide_hwifs[i];
646 if (hwif->hold)
647 continue;
648 if (!hwif->present && hwif->mate == NULL)
649 goto found;
650 }
651
652 hwif = NULL;
653 found:
654 return hwif;
655 }
656 EXPORT_SYMBOL_GPL(ide_deprecated_find_port);
657
658 /**
659 * ide_register_hw - register IDE interface
660 * @hw: hardware registers
661 * @quirkproc: quirkproc function
662 * @hwifp: pointer to returned hwif
663 *
664 * Register an IDE interface, specifying exactly the registers etc.
665 *
666 * Returns -1 on error.
667 */
668
669 int ide_register_hw(hw_regs_t *hw, void (*quirkproc)(ide_drive_t *),
670 ide_hwif_t **hwifp)
671 {
672 int index, retry = 1;
673 ide_hwif_t *hwif;
674 u8 idx[4] = { 0xff, 0xff, 0xff, 0xff };
675
676 do {
677 hwif = ide_deprecated_find_port(hw->io_ports[IDE_DATA_OFFSET]);
678 <<<<<<< HEAD:drivers/ide/ide.c
679 index = hwif->index;
680 =======
681 >>>>>>> 264e3e889d86e552b4191d69bb60f4f3b383135a:drivers/ide/ide.c
682 if (hwif)
683 goto found;
684 for (index = 0; index < MAX_HWIFS; index++)
685 ide_unregister(index, 1, 1);
686 } while (retry--);
687 return -1;
688 found:
689 <<<<<<< HEAD:drivers/ide/ide.c
690 =======
691 index = hwif->index;
692 >>>>>>> 264e3e889d86e552b4191d69bb60f4f3b383135a:drivers/ide/ide.c
693 if (hwif->present)
694 ide_unregister(index, 0, 1);
695 else if (!hwif->hold)
696 ide_init_port_data(hwif, index);
697
698 ide_init_port_hw(hwif, hw);
699 hwif->quirkproc = quirkproc;
700
701 idx[0] = index;
702
703 ide_device_add(idx, NULL);
704
705 if (hwifp)
706 *hwifp = hwif;
707
708 return hwif->present ? index : -1;
709 }
710
711 EXPORT_SYMBOL(ide_register_hw);
712
713 /*
714 * Locks for IDE setting functionality
715 */
716
717 DEFINE_MUTEX(ide_setting_mtx);
718
719 EXPORT_SYMBOL_GPL(ide_setting_mtx);
720
721 /**
722 * ide_spin_wait_hwgroup - wait for group
723 * @drive: drive in the group
724 *
725 * Wait for an IDE device group to go non busy and then return
726 * holding the ide_lock which guards the hwgroup->busy status
727 * and right to use it.
728 */
729
730 int ide_spin_wait_hwgroup (ide_drive_t *drive)
731 {
732 ide_hwgroup_t *hwgroup = HWGROUP(drive);
733 unsigned long timeout = jiffies + (3 * HZ);
734
735 spin_lock_irq(&ide_lock);
736
737 while (hwgroup->busy) {
738 unsigned long lflags;
739 spin_unlock_irq(&ide_lock);
740 local_irq_set(lflags);
741 if (time_after(jiffies, timeout)) {
742 local_irq_restore(lflags);
743 printk(KERN_ERR "%s: channel busy\n", drive->name);
744 return -EBUSY;
745 }
746 local_irq_restore(lflags);
747 spin_lock_irq(&ide_lock);
748 }
749 return 0;
750 }
751
752 EXPORT_SYMBOL(ide_spin_wait_hwgroup);
753
754 int set_io_32bit(ide_drive_t *drive, int arg)
755 {
756 if (drive->no_io_32bit)
757 return -EPERM;
758
759 if (arg < 0 || arg > 1 + (SUPPORT_VLB_SYNC << 1))
760 return -EINVAL;
761
762 if (ide_spin_wait_hwgroup(drive))
763 return -EBUSY;
764
765 drive->io_32bit = arg;
766
767 spin_unlock_irq(&ide_lock);
768
769 return 0;
770 }
771
772 static int set_ksettings(ide_drive_t *drive, int arg)
773 {
774 if (arg < 0 || arg > 1)
775 return -EINVAL;
776
777 if (ide_spin_wait_hwgroup(drive))
778 return -EBUSY;
779 drive->keep_settings = arg;
780 spin_unlock_irq(&ide_lock);
781
782 return 0;
783 }
784
785 int set_using_dma(ide_drive_t *drive, int arg)
786 {
787 #ifdef CONFIG_BLK_DEV_IDEDMA
788 ide_hwif_t *hwif = drive->hwif;
789 int err = -EPERM;
790
791 if (arg < 0 || arg > 1)
792 return -EINVAL;
793
794 if (!drive->id || !(drive->id->capability & 1))
795 goto out;
796
797 if (hwif->dma_host_set == NULL)
798 goto out;
799
800 err = -EBUSY;
801 if (ide_spin_wait_hwgroup(drive))
802 goto out;
803 /*
804 * set ->busy flag, unlock and let it ride
805 */
806 hwif->hwgroup->busy = 1;
807 spin_unlock_irq(&ide_lock);
808
809 err = 0;
810
811 if (arg) {
812 if (ide_set_dma(drive))
813 err = -EIO;
814 } else
815 ide_dma_off(drive);
816
817 /*
818 * lock, clear ->busy flag and unlock before leaving
819 */
820 spin_lock_irq(&ide_lock);
821 hwif->hwgroup->busy = 0;
822 spin_unlock_irq(&ide_lock);
823 out:
824 return err;
825 #else
826 if (arg < 0 || arg > 1)
827 return -EINVAL;
828
829 return -EPERM;
830 #endif
831 }
832
833 int set_pio_mode(ide_drive_t *drive, int arg)
834 {
835 struct request rq;
836
837 if (arg < 0 || arg > 255)
838 return -EINVAL;
839
840 if (drive->hwif->set_pio_mode == NULL)
841 return -ENOSYS;
842
843 if (drive->special.b.set_tune)
844 return -EBUSY;
845
846 ide_init_drive_cmd(&rq);
847 rq.cmd_type = REQ_TYPE_ATA_TASKFILE;
848
849 drive->tune_req = (u8) arg;
850 drive->special.b.set_tune = 1;
851 (void) ide_do_drive_cmd(drive, &rq, ide_wait);
852 return 0;
853 }
854
855 static int set_unmaskirq(ide_drive_t *drive, int arg)
856 {
857 if (drive->no_unmask)
858 return -EPERM;
859
860 if (arg < 0 || arg > 1)
861 return -EINVAL;
862
863 if (ide_spin_wait_hwgroup(drive))
864 return -EBUSY;
865 drive->unmask = arg;
866 spin_unlock_irq(&ide_lock);
867
868 return 0;
869 }
870
871 /**
872 * system_bus_clock - clock guess
873 *
874 * External version of the bus clock guess used by very old IDE drivers
875 * for things like VLB timings. Should not be used.
876 */
877
878 int system_bus_clock (void)
879 {
880 return system_bus_speed;
881 }
882
883 EXPORT_SYMBOL(system_bus_clock);
884
885 static int generic_ide_suspend(struct device *dev, pm_message_t mesg)
886 {
887 ide_drive_t *drive = dev->driver_data;
888 ide_hwif_t *hwif = HWIF(drive);
889 struct request rq;
890 struct request_pm_state rqpm;
891 ide_task_t args;
892 int ret;
893
894 /* Call ACPI _GTM only once */
895 if (!(drive->dn % 2))
896 ide_acpi_get_timing(hwif);
897
898 memset(&rq, 0, sizeof(rq));
899 memset(&rqpm, 0, sizeof(rqpm));
900 memset(&args, 0, sizeof(args));
901 rq.cmd_type = REQ_TYPE_PM_SUSPEND;
902 rq.special = &args;
903 rq.data = &rqpm;
904 rqpm.pm_step = ide_pm_state_start_suspend;
905 if (mesg.event == PM_EVENT_PRETHAW)
906 mesg.event = PM_EVENT_FREEZE;
907 rqpm.pm_state = mesg.event;
908
909 ret = ide_do_drive_cmd(drive, &rq, ide_wait);
910 /* only call ACPI _PS3 after both drivers are suspended */
911 if (!ret && (((drive->dn % 2) && hwif->drives[0].present
912 && hwif->drives[1].present)
913 || !hwif->drives[0].present
914 || !hwif->drives[1].present))
915 ide_acpi_set_state(hwif, 0);
916 return ret;
917 }
918
919 static int generic_ide_resume(struct device *dev)
920 {
921 ide_drive_t *drive = dev->driver_data;
922 ide_hwif_t *hwif = HWIF(drive);
923 struct request rq;
924 struct request_pm_state rqpm;
925 ide_task_t args;
926 int err;
927
928 /* Call ACPI _STM only once */
929 if (!(drive->dn % 2)) {
930 ide_acpi_set_state(hwif, 1);
931 ide_acpi_push_timing(hwif);
932 }
933
934 ide_acpi_exec_tfs(drive);
935
936 memset(&rq, 0, sizeof(rq));
937 memset(&rqpm, 0, sizeof(rqpm));
938 memset(&args, 0, sizeof(args));
939 rq.cmd_type = REQ_TYPE_PM_RESUME;
940 rq.special = &args;
941 rq.data = &rqpm;
942 rqpm.pm_step = ide_pm_state_start_resume;
943 rqpm.pm_state = PM_EVENT_ON;
944
945 err = ide_do_drive_cmd(drive, &rq, ide_head_wait);
946
947 if (err == 0 && dev->driver) {
948 ide_driver_t *drv = to_ide_driver(dev->driver);
949
950 if (drv->resume)
951 drv->resume(drive);
952 }
953
954 return err;
955 }
956
957 int generic_ide_ioctl(ide_drive_t *drive, struct file *file, struct block_device *bdev,
958 unsigned int cmd, unsigned long arg)
959 {
960 unsigned long flags;
961 ide_driver_t *drv;
962 void __user *p = (void __user *)arg;
963 int err = 0, (*setfunc)(ide_drive_t *, int);
964 u8 *val;
965
966 switch (cmd) {
967 case HDIO_GET_32BIT: val = &drive->io_32bit; goto read_val;
968 case HDIO_GET_KEEPSETTINGS: val = &drive->keep_settings; goto read_val;
969 case HDIO_GET_UNMASKINTR: val = &drive->unmask; goto read_val;
970 case HDIO_GET_DMA: val = &drive->using_dma; goto read_val;
971 case HDIO_SET_32BIT: setfunc = set_io_32bit; goto set_val;
972 case HDIO_SET_KEEPSETTINGS: setfunc = set_ksettings; goto set_val;
973 case HDIO_SET_PIO_MODE: setfunc = set_pio_mode; goto set_val;
974 case HDIO_SET_UNMASKINTR: setfunc = set_unmaskirq; goto set_val;
975 case HDIO_SET_DMA: setfunc = set_using_dma; goto set_val;
976 }
977
978 switch (cmd) {
979 case HDIO_OBSOLETE_IDENTITY:
980 case HDIO_GET_IDENTITY:
981 if (bdev != bdev->bd_contains)
982 return -EINVAL;
983 if (drive->id_read == 0)
984 return -ENOMSG;
985 if (copy_to_user(p, drive->id, (cmd == HDIO_GET_IDENTITY) ? sizeof(*drive->id) : 142))
986 return -EFAULT;
987 return 0;
988
989 case HDIO_GET_NICE:
990 return put_user(drive->dsc_overlap << IDE_NICE_DSC_OVERLAP |
991 drive->atapi_overlap << IDE_NICE_ATAPI_OVERLAP |
992 drive->nice1 << IDE_NICE_1,
993 (long __user *) arg);
994 #ifdef CONFIG_IDE_TASK_IOCTL
995 case HDIO_DRIVE_TASKFILE:
996 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
997 return -EACCES;
998 switch(drive->media) {
999 case ide_disk:
1000 return ide_taskfile_ioctl(drive, cmd, arg);
1001 default:
1002 return -ENOMSG;
1003 }
1004 #endif /* CONFIG_IDE_TASK_IOCTL */
1005
1006 case HDIO_DRIVE_CMD:
1007 if (!capable(CAP_SYS_RAWIO))
1008 return -EACCES;
1009 return ide_cmd_ioctl(drive, cmd, arg);
1010
1011 case HDIO_DRIVE_TASK:
1012 if (!capable(CAP_SYS_RAWIO))
1013 return -EACCES;
1014 return ide_task_ioctl(drive, cmd, arg);
1015
1016 case HDIO_SCAN_HWIF:
1017 {
1018 hw_regs_t hw;
1019 int args[3];
1020 if (!capable(CAP_SYS_RAWIO)) return -EACCES;
1021 if (copy_from_user(args, p, 3 * sizeof(int)))
1022 return -EFAULT;
1023 memset(&hw, 0, sizeof(hw));
1024 ide_init_hwif_ports(&hw, (unsigned long) args[0],
1025 (unsigned long) args[1], NULL);
1026 hw.irq = args[2];
1027 if (ide_register_hw(&hw, NULL, NULL) == -1)
1028 return -EIO;
1029 return 0;
1030 }
1031 case HDIO_UNREGISTER_HWIF:
1032 if (!capable(CAP_SYS_RAWIO)) return -EACCES;
1033 /* (arg > MAX_HWIFS) checked in function */
1034 ide_unregister(arg, 1, 1);
1035 return 0;
1036 case HDIO_SET_NICE:
1037 if (!capable(CAP_SYS_ADMIN)) return -EACCES;
1038 if (arg != (arg & ((1 << IDE_NICE_DSC_OVERLAP) | (1 << IDE_NICE_1))))
1039 return -EPERM;
1040 drive->dsc_overlap = (arg >> IDE_NICE_DSC_OVERLAP) & 1;
1041 drv = *(ide_driver_t **)bdev->bd_disk->private_data;
1042 if (drive->dsc_overlap && !drv->supports_dsc_overlap) {
1043 drive->dsc_overlap = 0;
1044 return -EPERM;
1045 }
1046 drive->nice1 = (arg >> IDE_NICE_1) & 1;
1047 return 0;
1048 case HDIO_DRIVE_RESET:
1049 <<<<<<< HEAD:drivers/ide/ide.c
1050 {
1051 unsigned long flags;
1052 if (!capable(CAP_SYS_ADMIN)) return -EACCES;
1053
1054 =======
1055 if (!capable(CAP_SYS_ADMIN))
1056 return -EACCES;
1057
1058 >>>>>>> 264e3e889d86e552b4191d69bb60f4f3b383135a:drivers/ide/ide.c
1059 /*
1060 * Abort the current command on the
1061 * group if there is one, taking
1062 * care not to allow anything else
1063 * to be queued and to die on the
1064 * spot if we miss one somehow
1065 */
1066
1067 spin_lock_irqsave(&ide_lock, flags);
1068
1069 if (HWGROUP(drive)->resetting) {
1070 spin_unlock_irqrestore(&ide_lock, flags);
1071 return -EBUSY;
1072 }
1073
1074 ide_abort(drive, "drive reset");
1075
1076 BUG_ON(HWGROUP(drive)->handler);
1077 <<<<<<< HEAD:drivers/ide/ide.c
1078
1079 =======
1080
1081 >>>>>>> 264e3e889d86e552b4191d69bb60f4f3b383135a:drivers/ide/ide.c
1082 /* Ensure nothing gets queued after we
1083 drop the lock. Reset will clear the busy */
1084 <<<<<<< HEAD:drivers/ide/ide.c
1085
1086 =======
1087
1088 >>>>>>> 264e3e889d86e552b4191d69bb60f4f3b383135a:drivers/ide/ide.c
1089 HWGROUP(drive)->busy = 1;
1090 spin_unlock_irqrestore(&ide_lock, flags);
1091 (void) ide_do_reset(drive);
1092
1093 return 0;
1094 <<<<<<< HEAD:drivers/ide/ide.c
1095 }
1096
1097 =======
1098 >>>>>>> 264e3e889d86e552b4191d69bb60f4f3b383135a:drivers/ide/ide.c
1099 case HDIO_GET_BUSSTATE:
1100 if (!capable(CAP_SYS_ADMIN))
1101 return -EACCES;
1102 if (put_user(HWIF(drive)->bus_state, (long __user *)arg))
1103 return -EFAULT;
1104 return 0;
1105
1106 case HDIO_SET_BUSSTATE:
1107 if (!capable(CAP_SYS_ADMIN))
1108 return -EACCES;
1109 if (HWIF(drive)->busproc)
1110 return HWIF(drive)->busproc(drive, (int)arg);
1111 return -EOPNOTSUPP;
1112 default:
1113 return -EINVAL;
1114 }
1115
1116 read_val:
1117 mutex_lock(&ide_setting_mtx);
1118 spin_lock_irqsave(&ide_lock, flags);
1119 err = *val;
1120 spin_unlock_irqrestore(&ide_lock, flags);
1121 mutex_unlock(&ide_setting_mtx);
1122 return err >= 0 ? put_user(err, (long __user *)arg) : err;
1123
1124 set_val:
1125 if (bdev != bdev->bd_contains)
1126 err = -EINVAL;
1127 else {
1128 if (!capable(CAP_SYS_ADMIN))
1129 err = -EACCES;
1130 else {
1131 mutex_lock(&ide_setting_mtx);
1132 err = setfunc(drive, arg);
1133 mutex_unlock(&ide_setting_mtx);
1134 }
1135 }
1136 return err;
1137 }
1138
1139 EXPORT_SYMBOL(generic_ide_ioctl);
1140
1141 /*
1142 * stridx() returns the offset of c within s,
1143 * or -1 if c is '\0' or not found within s.
1144 */
1145 static int __init stridx (const char *s, char c)
1146 {
1147 char *i = strchr(s, c);
1148 return (i && c) ? i - s : -1;
1149 }
1150
1151 /*
1152 * match_parm() does parsing for ide_setup():
1153 *
1154 * 1. the first char of s must be '='.
1155 * 2. if the remainder matches one of the supplied keywords,
1156 * the index (1 based) of the keyword is negated and returned.
1157 * 3. if the remainder is a series of no more than max_vals numbers
1158 * separated by commas, the numbers are saved in vals[] and a
1159 * count of how many were saved is returned. Base10 is assumed,
1160 * and base16 is allowed when prefixed with "0x".
1161 * 4. otherwise, zero is returned.
1162 */
1163 static int __init match_parm (char *s, const char *keywords[], int vals[], int max_vals)
1164 {
1165 static const char *decimal = "0123456789";
1166 static const char *hex = "0123456789abcdef";
1167 int i, n;
1168
1169 if (*s++ == '=') {
1170 /*
1171 * Try matching against the supplied keywords,
1172 * and return -(index+1) if we match one
1173 */
1174 if (keywords != NULL) {
1175 for (i = 0; *keywords != NULL; ++i) {
1176 if (!strcmp(s, *keywords++))
1177 return -(i+1);
1178 }
1179 }
1180 /*
1181 * Look for a series of no more than "max_vals"
1182 * numeric values separated by commas, in base10,
1183 * or base16 when prefixed with "0x".
1184 * Return a count of how many were found.
1185 */
1186 for (n = 0; (i = stridx(decimal, *s)) >= 0;) {
1187 vals[n] = i;
1188 while ((i = stridx(decimal, *++s)) >= 0)
1189 vals[n] = (vals[n] * 10) + i;
1190 if (*s == 'x' && !vals[n]) {
1191 while ((i = stridx(hex, *++s)) >= 0)
1192 vals[n] = (vals[n] * 0x10) + i;
1193 }
1194 if (++n == max_vals)
1195 break;
1196 if (*s == ',' || *s == ';')
1197 ++s;
1198 }
1199 if (!*s)
1200 return n;
1201 }
1202 return 0; /* zero = nothing matched */
1203 }
1204
1205 extern int probe_ali14xx;
1206 extern int probe_umc8672;
1207 extern int probe_dtc2278;
1208 extern int probe_ht6560b;
1209 extern int probe_qd65xx;
1210 extern int cmd640_vlb;
1211
1212 static int __initdata is_chipset_set[MAX_HWIFS];
1213
1214 /*
1215 * ide_setup() gets called VERY EARLY during initialization,
1216 * to handle kernel "command line" strings beginning with "hdx=" or "ide".
1217 *
1218 <<<<<<< HEAD:drivers/ide/ide.c
1219 * Remember to update Documentation/ide.txt if you change something here.
1220 =======
1221 * Remember to update Documentation/ide/ide.txt if you change something here.
1222 >>>>>>> 264e3e889d86e552b4191d69bb60f4f3b383135a:drivers/ide/ide.c
1223 */
1224 static int __init ide_setup(char *s)
1225 {
1226 int i, vals[3];
1227 ide_hwif_t *hwif;
1228 ide_drive_t *drive;
1229 unsigned int hw, unit;
1230 const char max_drive = 'a' + ((MAX_HWIFS * MAX_DRIVES) - 1);
1231 const char max_hwif = '0' + (MAX_HWIFS - 1);
1232
1233
1234 if (strncmp(s,"hd",2) == 0 && s[2] == '=') /* hd= is for hd.c */
1235 return 0; /* driver and not us */
1236
1237 if (strncmp(s,"ide",3) && strncmp(s,"idebus",6) && strncmp(s,"hd",2))
1238 return 0;
1239
1240 printk(KERN_INFO "ide_setup: %s", s);
1241 init_ide_data ();
1242
1243 #ifdef CONFIG_BLK_DEV_IDEDOUBLER
1244 if (!strcmp(s, "ide=doubler")) {
1245 extern int ide_doubler;
1246
1247 printk(" : Enabled support for IDE doublers\n");
1248 ide_doubler = 1;
1249 return 1;
1250 }
1251 #endif /* CONFIG_BLK_DEV_IDEDOUBLER */
1252
1253 if (!strcmp(s, "ide=nodma")) {
1254 printk(" : Prevented DMA\n");
1255 noautodma = 1;
1256 goto obsolete_option;
1257 }
1258
1259 #ifdef CONFIG_IDEPCI_PCIBUS_ORDER
1260 if (!strcmp(s, "ide=reverse")) {
1261 ide_scan_direction = 1;
1262 printk(" : Enabled support for IDE inverse scan order.\n");
1263 <<<<<<< HEAD:drivers/ide/ide.c
1264 return 1;
1265 =======
1266 goto obsolete_option;
1267 >>>>>>> 264e3e889d86e552b4191d69bb60f4f3b383135a:drivers/ide/ide.c
1268 }
1269 #endif
1270
1271 #ifdef CONFIG_BLK_DEV_IDEACPI
1272 if (!strcmp(s, "ide=noacpi")) {
1273 //printk(" : Disable IDE ACPI support.\n");
1274 ide_noacpi = 1;
1275 return 1;
1276 }
1277 if (!strcmp(s, "ide=acpigtf")) {
1278 //printk(" : Enable IDE ACPI _GTF support.\n");
1279 ide_noacpitfs = 0;
1280 return 1;
1281 }
1282 if (!strcmp(s, "ide=acpionboot")) {
1283 //printk(" : Call IDE ACPI methods on boot.\n");
1284 ide_noacpionboot = 0;
1285 return 1;
1286 }
1287 #endif /* CONFIG_BLK_DEV_IDEACPI */
1288
1289 /*
1290 * Look for drive options: "hdx="
1291 */
1292 if (s[0] == 'h' && s[1] == 'd' && s[2] >= 'a' && s[2] <= max_drive) {
1293 const char *hd_words[] = {
1294 "none", "noprobe", "nowerr", "cdrom", "nodma",
1295 "autotune", "noautotune", "-8", "-9", "-10",
1296 "noflush", "remap", "remap63", "scsi", NULL };
1297 unit = s[2] - 'a';
1298 hw = unit / MAX_DRIVES;
1299 unit = unit % MAX_DRIVES;
1300 hwif = &ide_hwifs[hw];
1301 drive = &hwif->drives[unit];
1302 if (strncmp(s + 4, "ide-", 4) == 0) {
1303 strlcpy(drive->driver_req, s + 4, sizeof(drive->driver_req));
1304 goto done;
1305 }
1306 switch (match_parm(&s[3], hd_words, vals, 3)) {
1307 case -1: /* "none" */
1308 case -2: /* "noprobe" */
1309 drive->noprobe = 1;
1310 goto done;
1311 case -3: /* "nowerr" */
1312 drive->bad_wstat = BAD_R_STAT;
1313 hwif->noprobe = 0;
1314 goto done;
1315 case -4: /* "cdrom" */
1316 drive->present = 1;
1317 drive->media = ide_cdrom;
1318 /* an ATAPI device ignores DRDY */
1319 drive->ready_stat = 0;
1320 hwif->noprobe = 0;
1321 goto done;
1322 case -5: /* nodma */
1323 drive->nodma = 1;
1324 goto done;
1325 case -6: /* "autotune" */
1326 drive->autotune = IDE_TUNE_AUTO;
1327 goto obsolete_option;
1328 case -7: /* "noautotune" */
1329 drive->autotune = IDE_TUNE_NOAUTO;
1330 goto obsolete_option;
1331 case -11: /* noflush */
1332 drive->noflush = 1;
1333 goto done;
1334 case -12: /* "remap" */
1335 drive->remap_0_to_1 = 1;
1336 goto done;
1337 case -13: /* "remap63" */
1338 drive->sect0 = 63;
1339 goto done;
1340 case -14: /* "scsi" */
1341 drive->scsi = 1;
1342 goto done;
1343 case 3: /* cyl,head,sect */
1344 drive->media = ide_disk;
1345 drive->ready_stat = READY_STAT;
1346 drive->cyl = drive->bios_cyl = vals[0];
1347 drive->head = drive->bios_head = vals[1];
1348 drive->sect = drive->bios_sect = vals[2];
1349 drive->present = 1;
1350 drive->forced_geom = 1;
1351 hwif->noprobe = 0;
1352 goto done;
1353 default:
1354 goto bad_option;
1355 }
1356 }
1357
1358 if (s[0] != 'i' || s[1] != 'd' || s[2] != 'e')
1359 goto bad_option;
1360 /*
1361 * Look for bus speed option: "idebus="
1362 */
1363 if (s[3] == 'b' && s[4] == 'u' && s[5] == 's') {
1364 if (match_parm(&s[6], NULL, vals, 1) != 1)
1365 goto bad_option;
1366 if (vals[0] >= 20 && vals[0] <= 66) {
1367 idebus_parameter = vals[0];
1368 } else
1369 printk(" -- BAD BUS SPEED! Expected value from 20 to 66");
1370 goto done;
1371 }
1372 /*
1373 * Look for interface options: "idex="
1374 */
1375 if (s[3] >= '0' && s[3] <= max_hwif) {
1376 /*
1377 * Be VERY CAREFUL changing this: note hardcoded indexes below
1378 * (-8, -9, -10) are reserved to ease the hardcoding.
1379 */
1380 static const char *ide_words[] = {
1381 "noprobe", "serialize", "minus3", "minus4",
1382 "reset", "minus6", "ata66", "minus8", "minus9",
1383 "minus10", "four", "qd65xx", "ht6560b", "cmd640_vlb",
1384 "dtc2278", "umc8672", "ali14xx", NULL };
1385
1386 hw_regs_t hwregs;
1387
1388 hw = s[3] - '0';
1389 hwif = &ide_hwifs[hw];
1390 i = match_parm(&s[4], ide_words, vals, 3);
1391
1392 /*
1393 * Cryptic check to ensure chipset not already set for hwif.
1394 * Note: we can't depend on hwif->chipset here.
1395 */
1396 if ((i >= -18 && i <= -11) || (i > 0 && i <= 3)) {
1397 /* chipset already specified */
1398 if (is_chipset_set[hw])
1399 goto bad_option;
1400 if (i > -18 && i <= -11) {
1401 /* these drivers are for "ide0=" only */
1402 if (hw != 0)
1403 goto bad_hwif;
1404 /* chipset already specified for 2nd port */
1405 if (is_chipset_set[hw+1])
1406 goto bad_option;
1407 }
1408 is_chipset_set[hw] = 1;
1409 printk("\n");
1410 }
1411
1412 switch (i) {
1413 #ifdef CONFIG_BLK_DEV_ALI14XX
1414 case -17: /* "ali14xx" */
1415 probe_ali14xx = 1;
1416 goto done;
1417 #endif
1418 #ifdef CONFIG_BLK_DEV_UMC8672
1419 case -16: /* "umc8672" */
1420 probe_umc8672 = 1;
1421 goto done;
1422 #endif
1423 #ifdef CONFIG_BLK_DEV_DTC2278
1424 case -15: /* "dtc2278" */
1425 probe_dtc2278 = 1;
1426 goto done;
1427 #endif
1428 #ifdef CONFIG_BLK_DEV_CMD640
1429 case -14: /* "cmd640_vlb" */
1430 cmd640_vlb = 1;
1431 goto done;
1432 #endif
1433 #ifdef CONFIG_BLK_DEV_HT6560B
1434 case -13: /* "ht6560b" */
1435 probe_ht6560b = 1;
1436 goto done;
1437 #endif
1438 #ifdef CONFIG_BLK_DEV_QD65XX
1439 case -12: /* "qd65xx" */
1440 probe_qd65xx = 1;
1441 goto done;
1442 #endif
1443 #ifdef CONFIG_BLK_DEV_4DRIVES
1444 case -11: /* "four" drives on one set of ports */
1445 {
1446 ide_hwif_t *mate = &ide_hwifs[hw^1];
1447 mate->drives[0].select.all ^= 0x20;
1448 mate->drives[1].select.all ^= 0x20;
1449 hwif->chipset = mate->chipset = ide_4drives;
1450 mate->irq = hwif->irq;
1451 memcpy(mate->io_ports, hwif->io_ports, sizeof(hwif->io_ports));
1452 hwif->mate = mate;
1453 mate->mate = hwif;
1454 hwif->serialized = mate->serialized = 1;
1455 goto obsolete_option;
1456 }
1457 #endif /* CONFIG_BLK_DEV_4DRIVES */
1458 case -10: /* minus10 */
1459 case -9: /* minus9 */
1460 case -8: /* minus8 */
1461 case -6:
1462 case -4:
1463 case -3:
1464 goto bad_option;
1465 case -7: /* ata66 */
1466 #ifdef CONFIG_BLK_DEV_IDEPCI
1467 /*
1468 * Use ATA_CBL_PATA40_SHORT so drive side
1469 * cable detection is also overriden.
1470 */
1471 hwif->cbl = ATA_CBL_PATA40_SHORT;
1472 goto obsolete_option;
1473 #else
1474 goto bad_hwif;
1475 #endif
1476 case -5: /* "reset" */
1477 hwif->reset = 1;
1478 goto obsolete_option;
1479 case -2: /* "serialize" */
1480 hwif->mate = &ide_hwifs[hw^1];
1481 hwif->mate->mate = hwif;
1482 hwif->serialized = hwif->mate->serialized = 1;
1483 goto obsolete_option;
1484
1485 case -1: /* "noprobe" */
1486 hwif->noprobe = 1;
1487 <<<<<<< HEAD:drivers/ide/ide.c
1488 goto done;
1489 =======
1490 goto obsolete_option;
1491 >>>>>>> 264e3e889d86e552b4191d69bb60f4f3b383135a:drivers/ide/ide.c
1492
1493 case 1: /* base */
1494 vals[1] = vals[0] + 0x206; /* default ctl */
1495 case 2: /* base,ctl */
1496 vals[2] = 0; /* default irq = probe for it */
1497 case 3: /* base,ctl,irq */
1498 memset(&hwregs, 0, sizeof(hwregs));
1499 ide_init_hwif_ports(&hwregs, vals[0], vals[1], &hwif->irq);
1500 memcpy(hwif->io_ports, hwregs.io_ports, sizeof(hwif->io_ports));
1501 hwif->irq = vals[2];
1502 hwif->noprobe = 0;
1503 hwif->chipset = ide_forced;
1504 goto obsolete_option;
1505
1506 case 0: goto bad_option;
1507 default:
1508 printk(" -- SUPPORT NOT CONFIGURED IN THIS KERNEL\n");
1509 return 1;
1510 }
1511 }
1512 bad_option:
1513 printk(" -- BAD OPTION\n");
1514 return 1;
1515 obsolete_option:
1516 printk(" -- OBSOLETE OPTION, WILL BE REMOVED SOON!\n");
1517 return 1;
1518 bad_hwif:
1519 printk("-- NOT SUPPORTED ON ide%d", hw);
1520 done:
1521 printk("\n");
1522 return 1;
1523 }
1524
1525 EXPORT_SYMBOL(ide_lock);
1526
1527 static int ide_bus_match(struct device *dev, struct device_driver *drv)
1528 {
1529 return 1;
1530 }
1531
1532 static char *media_string(ide_drive_t *drive)
1533 {
1534 switch (drive->media) {
1535 case ide_disk:
1536 return "disk";
1537 case ide_cdrom:
1538 return "cdrom";
1539 case ide_tape:
1540 return "tape";
1541 case ide_floppy:
1542 return "floppy";
1543 case ide_optical:
1544 return "optical";
1545 default:
1546 return "UNKNOWN";
1547 }
1548 }
1549
1550 static ssize_t media_show(struct device *dev, struct device_attribute *attr, char *buf)
1551 {
1552 ide_drive_t *drive = to_ide_device(dev);
1553 return sprintf(buf, "%s\n", media_string(drive));
1554 }
1555
1556 static ssize_t drivename_show(struct device *dev, struct device_attribute *attr, char *buf)
1557 {
1558 ide_drive_t *drive = to_ide_device(dev);
1559 return sprintf(buf, "%s\n", drive->name);
1560 }
1561
1562 static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf)
1563 {
1564 ide_drive_t *drive = to_ide_device(dev);
1565 return sprintf(buf, "ide:m-%s\n", media_string(drive));
1566 }
1567
1568 static ssize_t model_show(struct device *dev, struct device_attribute *attr,
1569 char *buf)
1570 {
1571 ide_drive_t *drive = to_ide_device(dev);
1572 return sprintf(buf, "%s\n", drive->id->model);
1573 }
1574
1575 static ssize_t firmware_show(struct device *dev, struct device_attribute *attr,
1576 char *buf)
1577 {
1578 ide_drive_t *drive = to_ide_device(dev);
1579 return sprintf(buf, "%s\n", drive->id->fw_rev);
1580 }
1581
1582 static ssize_t serial_show(struct device *dev, struct device_attribute *attr,
1583 char *buf)
1584 {
1585 ide_drive_t *drive = to_ide_device(dev);
1586 return sprintf(buf, "%s\n", drive->id->serial_no);
1587 }
1588
1589 static struct device_attribute ide_dev_attrs[] = {
1590 __ATTR_RO(media),
1591 __ATTR_RO(drivename),
1592 __ATTR_RO(modalias),
1593 __ATTR_RO(model),
1594 __ATTR_RO(firmware),
1595 __ATTR(serial, 0400, serial_show, NULL),
1596 __ATTR_NULL
1597 };
1598
1599 static int ide_uevent(struct device *dev, struct kobj_uevent_env *env)
1600 {
1601 ide_drive_t *drive = to_ide_device(dev);
1602
1603 add_uevent_var(env, "MEDIA=%s", media_string(drive));
1604 add_uevent_var(env, "DRIVENAME=%s", drive->name);
1605 add_uevent_var(env, "MODALIAS=ide:m-%s", media_string(drive));
1606 return 0;
1607 }
1608
1609 static int generic_ide_probe(struct device *dev)
1610 {
1611 ide_drive_t *drive = to_ide_device(dev);
1612 ide_driver_t *drv = to_ide_driver(dev->driver);
1613
1614 return drv->probe ? drv->probe(drive) : -ENODEV;
1615 }
1616
1617 static int generic_ide_remove(struct device *dev)
1618 {
1619 ide_drive_t *drive = to_ide_device(dev);
1620 ide_driver_t *drv = to_ide_driver(dev->driver);
1621
1622 if (drv->remove)
1623 drv->remove(drive);
1624
1625 return 0;
1626 }
1627
1628 static void generic_ide_shutdown(struct device *dev)
1629 {
1630 ide_drive_t *drive = to_ide_device(dev);
1631 ide_driver_t *drv = to_ide_driver(dev->driver);
1632
1633 if (dev->driver && drv->shutdown)
1634 drv->shutdown(drive);
1635 }
1636
1637 struct bus_type ide_bus_type = {
1638 .name = "ide",
1639 .match = ide_bus_match,
1640 .uevent = ide_uevent,
1641 .probe = generic_ide_probe,
1642 .remove = generic_ide_remove,
1643 .shutdown = generic_ide_shutdown,
1644 .dev_attrs = ide_dev_attrs,
1645 .suspend = generic_ide_suspend,
1646 .resume = generic_ide_resume,
1647 };
1648
1649 EXPORT_SYMBOL_GPL(ide_bus_type);
1650
1651 /*
1652 * This is gets invoked once during initialization, to set *everything* up
1653 */
1654 static int __init ide_init(void)
1655 {
1656 int ret;
1657
1658 printk(KERN_INFO "Uniform Multi-Platform E-IDE driver\n");
1659 system_bus_speed = ide_system_bus_speed();
1660
1661 printk(KERN_INFO "ide: Assuming %dMHz system bus speed "
1662 "for PIO modes%s\n", system_bus_speed,
1663 idebus_parameter ? "" : "; override with idebus=xx");
1664
1665 ret = bus_register(&ide_bus_type);
1666 if (ret < 0) {
1667 printk(KERN_WARNING "IDE: bus_register error: %d\n", ret);
1668 return ret;
1669 }
1670
1671 init_ide_data();
1672
1673 proc_ide_create();
1674
1675 return 0;
1676 }
1677
1678 #ifdef MODULE
1679 static char *options = NULL;
1680 module_param(options, charp, 0);
1681 MODULE_LICENSE("GPL");
1682
1683 static void __init parse_options (char *line)
1684 {
1685 char *next = line;
1686
1687 if (line == NULL || !*line)
1688 return;
1689 while ((line = next) != NULL) {
1690 if ((next = strchr(line,' ')) != NULL)
1691 *next++ = 0;
1692 if (!ide_setup(line))
1693 printk (KERN_INFO "Unknown option '%s'\n", line);
1694 }
1695 }
1696
1697 int __init init_module (void)
1698 {
1699 parse_options(options);
1700 return ide_init();
1701 }
1702
1703 void __exit cleanup_module (void)
1704 {
1705 int index;
1706
1707 for (index = 0; index < MAX_HWIFS; ++index)
1708 ide_unregister(index, 0, 0);
1709
1710 proc_ide_destroy();
1711
1712 bus_unregister(&ide_bus_type);
1713 }
1714
1715 #else /* !MODULE */
1716
1717 __setup("", ide_setup);
1718
1719 module_init(ide_init);
1720
1721 #endif /* MODULE */
WRT350N Kernel Patches