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Merge branch 'for-linus' of git://linux-nfs.org/~bfields/linux
[linux-2.6/cjktty.git] / drivers / ide / ide.c
blob4a8952a6c3daa2433c8cc7c876c5d4b55388daf1
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 /*
594 * Note that we only release the standard ports,
595 * and do not even try to handle any extra ports
596 * allocated for weird IDE interface chipsets.
597 */
598 ide_hwif_release_regions(hwif);
599
600 /* copy original settings */
601 tmp_hwif = *hwif;
602
603 /* restore hwif data to pristine status */
604 ide_init_port_data(hwif, index);
605
606 if (init_default)
607 init_hwif_default(hwif, index);
608
609 if (restore)
610 ide_hwif_restore(hwif, &tmp_hwif);
611
612 abort:
613 spin_unlock_irq(&ide_lock);
614 mutex_unlock(&ide_cfg_mtx);
615 }
616
617 EXPORT_SYMBOL(ide_unregister);
618
619 void ide_init_port_hw(ide_hwif_t *hwif, hw_regs_t *hw)
620 {
621 memcpy(hwif->io_ports, hw->io_ports, sizeof(hwif->io_ports));
622 hwif->irq = hw->irq;
623 hwif->noprobe = 0;
624 hwif->chipset = hw->chipset;
625 hwif->gendev.parent = hw->dev;
626 hwif->ack_intr = hw->ack_intr;
627 }
628 EXPORT_SYMBOL_GPL(ide_init_port_hw);
629
630 ide_hwif_t *ide_deprecated_find_port(unsigned long base)
631 {
632 ide_hwif_t *hwif;
633 int i;
634
635 for (i = 0; i < MAX_HWIFS; i++) {
636 hwif = &ide_hwifs[i];
637 if (hwif->io_ports[IDE_DATA_OFFSET] == base)
638 goto found;
639 }
640
641 for (i = 0; i < MAX_HWIFS; i++) {
642 hwif = &ide_hwifs[i];
643 if (hwif->hold)
644 continue;
645 if (!hwif->present && hwif->mate == NULL)
646 goto found;
647 }
648
649 hwif = NULL;
650 found:
651 return hwif;
652 }
653 EXPORT_SYMBOL_GPL(ide_deprecated_find_port);
654
655 /**
656 * ide_register_hw - register IDE interface
657 * @hw: hardware registers
658 * @quirkproc: quirkproc function
659 * @hwifp: pointer to returned hwif
660 *
661 * Register an IDE interface, specifying exactly the registers etc.
662 *
663 * Returns -1 on error.
664 */
665
666 int ide_register_hw(hw_regs_t *hw, void (*quirkproc)(ide_drive_t *),
667 ide_hwif_t **hwifp)
668 {
669 int index, retry = 1;
670 ide_hwif_t *hwif;
671 u8 idx[4] = { 0xff, 0xff, 0xff, 0xff };
672
673 do {
674 hwif = ide_deprecated_find_port(hw->io_ports[IDE_DATA_OFFSET]);
675 index = hwif->index;
676 if (hwif)
677 goto found;
678 for (index = 0; index < MAX_HWIFS; index++)
679 ide_unregister(index, 1, 1);
680 } while (retry--);
681 return -1;
682 found:
683 if (hwif->present)
684 ide_unregister(index, 0, 1);
685 else if (!hwif->hold)
686 ide_init_port_data(hwif, index);
687
688 ide_init_port_hw(hwif, hw);
689 hwif->quirkproc = quirkproc;
690
691 idx[0] = index;
692
693 ide_device_add(idx, NULL);
694
695 if (hwifp)
696 *hwifp = hwif;
697
698 return hwif->present ? index : -1;
699 }
700
701 EXPORT_SYMBOL(ide_register_hw);
702
703 /*
704 * Locks for IDE setting functionality
705 */
706
707 DEFINE_MUTEX(ide_setting_mtx);
708
709 EXPORT_SYMBOL_GPL(ide_setting_mtx);
710
711 /**
712 * ide_spin_wait_hwgroup - wait for group
713 * @drive: drive in the group
714 *
715 * Wait for an IDE device group to go non busy and then return
716 * holding the ide_lock which guards the hwgroup->busy status
717 * and right to use it.
718 */
719
720 int ide_spin_wait_hwgroup (ide_drive_t *drive)
721 {
722 ide_hwgroup_t *hwgroup = HWGROUP(drive);
723 unsigned long timeout = jiffies + (3 * HZ);
724
725 spin_lock_irq(&ide_lock);
726
727 while (hwgroup->busy) {
728 unsigned long lflags;
729 spin_unlock_irq(&ide_lock);
730 local_irq_set(lflags);
731 if (time_after(jiffies, timeout)) {
732 local_irq_restore(lflags);
733 printk(KERN_ERR "%s: channel busy\n", drive->name);
734 return -EBUSY;
735 }
736 local_irq_restore(lflags);
737 spin_lock_irq(&ide_lock);
738 }
739 return 0;
740 }
741
742 EXPORT_SYMBOL(ide_spin_wait_hwgroup);
743
744 int set_io_32bit(ide_drive_t *drive, int arg)
745 {
746 if (drive->no_io_32bit)
747 return -EPERM;
748
749 if (arg < 0 || arg > 1 + (SUPPORT_VLB_SYNC << 1))
750 return -EINVAL;
751
752 if (ide_spin_wait_hwgroup(drive))
753 return -EBUSY;
754
755 drive->io_32bit = arg;
756
757 spin_unlock_irq(&ide_lock);
758
759 return 0;
760 }
761
762 static int set_ksettings(ide_drive_t *drive, int arg)
763 {
764 if (arg < 0 || arg > 1)
765 return -EINVAL;
766
767 if (ide_spin_wait_hwgroup(drive))
768 return -EBUSY;
769 drive->keep_settings = arg;
770 spin_unlock_irq(&ide_lock);
771
772 return 0;
773 }
774
775 int set_using_dma(ide_drive_t *drive, int arg)
776 {
777 #ifdef CONFIG_BLK_DEV_IDEDMA
778 ide_hwif_t *hwif = drive->hwif;
779 int err = -EPERM;
780
781 if (arg < 0 || arg > 1)
782 return -EINVAL;
783
784 if (!drive->id || !(drive->id->capability & 1))
785 goto out;
786
787 if (hwif->dma_host_set == NULL)
788 goto out;
789
790 err = -EBUSY;
791 if (ide_spin_wait_hwgroup(drive))
792 goto out;
793 /*
794 * set ->busy flag, unlock and let it ride
795 */
796 hwif->hwgroup->busy = 1;
797 spin_unlock_irq(&ide_lock);
798
799 err = 0;
800
801 if (arg) {
802 if (ide_set_dma(drive))
803 err = -EIO;
804 } else
805 ide_dma_off(drive);
806
807 /*
808 * lock, clear ->busy flag and unlock before leaving
809 */
810 spin_lock_irq(&ide_lock);
811 hwif->hwgroup->busy = 0;
812 spin_unlock_irq(&ide_lock);
813 out:
814 return err;
815 #else
816 if (arg < 0 || arg > 1)
817 return -EINVAL;
818
819 return -EPERM;
820 #endif
821 }
822
823 int set_pio_mode(ide_drive_t *drive, int arg)
824 {
825 struct request rq;
826
827 if (arg < 0 || arg > 255)
828 return -EINVAL;
829
830 if (drive->hwif->set_pio_mode == NULL)
831 return -ENOSYS;
832
833 if (drive->special.b.set_tune)
834 return -EBUSY;
835
836 ide_init_drive_cmd(&rq);
837 rq.cmd_type = REQ_TYPE_ATA_TASKFILE;
838
839 drive->tune_req = (u8) arg;
840 drive->special.b.set_tune = 1;
841 (void) ide_do_drive_cmd(drive, &rq, ide_wait);
842 return 0;
843 }
844
845 static int set_unmaskirq(ide_drive_t *drive, int arg)
846 {
847 if (drive->no_unmask)
848 return -EPERM;
849
850 if (arg < 0 || arg > 1)
851 return -EINVAL;
852
853 if (ide_spin_wait_hwgroup(drive))
854 return -EBUSY;
855 drive->unmask = arg;
856 spin_unlock_irq(&ide_lock);
857
858 return 0;
859 }
860
861 /**
862 * system_bus_clock - clock guess
863 *
864 * External version of the bus clock guess used by very old IDE drivers
865 * for things like VLB timings. Should not be used.
866 */
867
868 int system_bus_clock (void)
869 {
870 return system_bus_speed;
871 }
872
873 EXPORT_SYMBOL(system_bus_clock);
874
875 static int generic_ide_suspend(struct device *dev, pm_message_t mesg)
876 {
877 ide_drive_t *drive = dev->driver_data;
878 ide_hwif_t *hwif = HWIF(drive);
879 struct request rq;
880 struct request_pm_state rqpm;
881 ide_task_t args;
882 int ret;
883
884 /* Call ACPI _GTM only once */
885 if (!(drive->dn % 2))
886 ide_acpi_get_timing(hwif);
887
888 memset(&rq, 0, sizeof(rq));
889 memset(&rqpm, 0, sizeof(rqpm));
890 memset(&args, 0, sizeof(args));
891 rq.cmd_type = REQ_TYPE_PM_SUSPEND;
892 rq.special = &args;
893 rq.data = &rqpm;
894 rqpm.pm_step = ide_pm_state_start_suspend;
895 if (mesg.event == PM_EVENT_PRETHAW)
896 mesg.event = PM_EVENT_FREEZE;
897 rqpm.pm_state = mesg.event;
898
899 ret = ide_do_drive_cmd(drive, &rq, ide_wait);
900 /* only call ACPI _PS3 after both drivers are suspended */
901 if (!ret && (((drive->dn % 2) && hwif->drives[0].present
902 && hwif->drives[1].present)
903 || !hwif->drives[0].present
904 || !hwif->drives[1].present))
905 ide_acpi_set_state(hwif, 0);
906 return ret;
907 }
908
909 static int generic_ide_resume(struct device *dev)
910 {
911 ide_drive_t *drive = dev->driver_data;
912 ide_hwif_t *hwif = HWIF(drive);
913 struct request rq;
914 struct request_pm_state rqpm;
915 ide_task_t args;
916 int err;
917
918 /* Call ACPI _STM only once */
919 if (!(drive->dn % 2)) {
920 ide_acpi_set_state(hwif, 1);
921 ide_acpi_push_timing(hwif);
922 }
923
924 ide_acpi_exec_tfs(drive);
925
926 memset(&rq, 0, sizeof(rq));
927 memset(&rqpm, 0, sizeof(rqpm));
928 memset(&args, 0, sizeof(args));
929 rq.cmd_type = REQ_TYPE_PM_RESUME;
930 rq.special = &args;
931 rq.data = &rqpm;
932 rqpm.pm_step = ide_pm_state_start_resume;
933 rqpm.pm_state = PM_EVENT_ON;
934
935 err = ide_do_drive_cmd(drive, &rq, ide_head_wait);
936
937 if (err == 0 && dev->driver) {
938 ide_driver_t *drv = to_ide_driver(dev->driver);
939
940 if (drv->resume)
941 drv->resume(drive);
942 }
943
944 return err;
945 }
946
947 int generic_ide_ioctl(ide_drive_t *drive, struct file *file, struct block_device *bdev,
948 unsigned int cmd, unsigned long arg)
949 {
950 unsigned long flags;
951 ide_driver_t *drv;
952 void __user *p = (void __user *)arg;
953 int err = 0, (*setfunc)(ide_drive_t *, int);
954 u8 *val;
955
956 switch (cmd) {
957 case HDIO_GET_32BIT: val = &drive->io_32bit; goto read_val;
958 case HDIO_GET_KEEPSETTINGS: val = &drive->keep_settings; goto read_val;
959 case HDIO_GET_UNMASKINTR: val = &drive->unmask; goto read_val;
960 case HDIO_GET_DMA: val = &drive->using_dma; goto read_val;
961 case HDIO_SET_32BIT: setfunc = set_io_32bit; goto set_val;
962 case HDIO_SET_KEEPSETTINGS: setfunc = set_ksettings; goto set_val;
963 case HDIO_SET_PIO_MODE: setfunc = set_pio_mode; goto set_val;
964 case HDIO_SET_UNMASKINTR: setfunc = set_unmaskirq; goto set_val;
965 case HDIO_SET_DMA: setfunc = set_using_dma; goto set_val;
966 }
967
968 switch (cmd) {
969 case HDIO_OBSOLETE_IDENTITY:
970 case HDIO_GET_IDENTITY:
971 if (bdev != bdev->bd_contains)
972 return -EINVAL;
973 if (drive->id_read == 0)
974 return -ENOMSG;
975 if (copy_to_user(p, drive->id, (cmd == HDIO_GET_IDENTITY) ? sizeof(*drive->id) : 142))
976 return -EFAULT;
977 return 0;
978
979 case HDIO_GET_NICE:
980 return put_user(drive->dsc_overlap << IDE_NICE_DSC_OVERLAP |
981 drive->atapi_overlap << IDE_NICE_ATAPI_OVERLAP |
982 drive->nice1 << IDE_NICE_1,
983 (long __user *) arg);
984 #ifdef CONFIG_IDE_TASK_IOCTL
985 case HDIO_DRIVE_TASKFILE:
986 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
987 return -EACCES;
988 switch(drive->media) {
989 case ide_disk:
990 return ide_taskfile_ioctl(drive, cmd, arg);
991 default:
992 return -ENOMSG;
993 }
994 #endif /* CONFIG_IDE_TASK_IOCTL */
995
996 case HDIO_DRIVE_CMD:
997 if (!capable(CAP_SYS_RAWIO))
998 return -EACCES;
999 return ide_cmd_ioctl(drive, cmd, arg);
1000
1001 case HDIO_DRIVE_TASK:
1002 if (!capable(CAP_SYS_RAWIO))
1003 return -EACCES;
1004 return ide_task_ioctl(drive, cmd, arg);
1005
1006 case HDIO_SCAN_HWIF:
1007 {
1008 hw_regs_t hw;
1009 int args[3];
1010 if (!capable(CAP_SYS_RAWIO)) return -EACCES;
1011 if (copy_from_user(args, p, 3 * sizeof(int)))
1012 return -EFAULT;
1013 memset(&hw, 0, sizeof(hw));
1014 ide_init_hwif_ports(&hw, (unsigned long) args[0],
1015 (unsigned long) args[1], NULL);
1016 hw.irq = args[2];
1017 if (ide_register_hw(&hw, NULL, NULL) == -1)
1018 return -EIO;
1019 return 0;
1020 }
1021 case HDIO_UNREGISTER_HWIF:
1022 if (!capable(CAP_SYS_RAWIO)) return -EACCES;
1023 /* (arg > MAX_HWIFS) checked in function */
1024 ide_unregister(arg, 1, 1);
1025 return 0;
1026 case HDIO_SET_NICE:
1027 if (!capable(CAP_SYS_ADMIN)) return -EACCES;
1028 if (arg != (arg & ((1 << IDE_NICE_DSC_OVERLAP) | (1 << IDE_NICE_1))))
1029 return -EPERM;
1030 drive->dsc_overlap = (arg >> IDE_NICE_DSC_OVERLAP) & 1;
1031 drv = *(ide_driver_t **)bdev->bd_disk->private_data;
1032 if (drive->dsc_overlap && !drv->supports_dsc_overlap) {
1033 drive->dsc_overlap = 0;
1034 return -EPERM;
1035 }
1036 drive->nice1 = (arg >> IDE_NICE_1) & 1;
1037 return 0;
1038 case HDIO_DRIVE_RESET:
1039 {
1040 unsigned long flags;
1041 if (!capable(CAP_SYS_ADMIN)) return -EACCES;
1042
1043 /*
1044 * Abort the current command on the
1045 * group if there is one, taking
1046 * care not to allow anything else
1047 * to be queued and to die on the
1048 * spot if we miss one somehow
1049 */
1050
1051 spin_lock_irqsave(&ide_lock, flags);
1052
1053 if (HWGROUP(drive)->resetting) {
1054 spin_unlock_irqrestore(&ide_lock, flags);
1055 return -EBUSY;
1056 }
1057
1058 ide_abort(drive, "drive reset");
1059
1060 BUG_ON(HWGROUP(drive)->handler);
1061
1062 /* Ensure nothing gets queued after we
1063 drop the lock. Reset will clear the busy */
1064
1065 HWGROUP(drive)->busy = 1;
1066 spin_unlock_irqrestore(&ide_lock, flags);
1067 (void) ide_do_reset(drive);
1068
1069 return 0;
1070 }
1071
1072 case HDIO_GET_BUSSTATE:
1073 if (!capable(CAP_SYS_ADMIN))
1074 return -EACCES;
1075 if (put_user(HWIF(drive)->bus_state, (long __user *)arg))
1076 return -EFAULT;
1077 return 0;
1078
1079 case HDIO_SET_BUSSTATE:
1080 if (!capable(CAP_SYS_ADMIN))
1081 return -EACCES;
1082 if (HWIF(drive)->busproc)
1083 return HWIF(drive)->busproc(drive, (int)arg);
1084 return -EOPNOTSUPP;
1085 default:
1086 return -EINVAL;
1087 }
1088
1089 read_val:
1090 mutex_lock(&ide_setting_mtx);
1091 spin_lock_irqsave(&ide_lock, flags);
1092 err = *val;
1093 spin_unlock_irqrestore(&ide_lock, flags);
1094 mutex_unlock(&ide_setting_mtx);
1095 return err >= 0 ? put_user(err, (long __user *)arg) : err;
1096
1097 set_val:
1098 if (bdev != bdev->bd_contains)
1099 err = -EINVAL;
1100 else {
1101 if (!capable(CAP_SYS_ADMIN))
1102 err = -EACCES;
1103 else {
1104 mutex_lock(&ide_setting_mtx);
1105 err = setfunc(drive, arg);
1106 mutex_unlock(&ide_setting_mtx);
1107 }
1108 }
1109 return err;
1110 }
1111
1112 EXPORT_SYMBOL(generic_ide_ioctl);
1113
1114 /*
1115 * stridx() returns the offset of c within s,
1116 * or -1 if c is '\0' or not found within s.
1117 */
1118 static int __init stridx (const char *s, char c)
1119 {
1120 char *i = strchr(s, c);
1121 return (i && c) ? i - s : -1;
1122 }
1123
1124 /*
1125 * match_parm() does parsing for ide_setup():
1126 *
1127 * 1. the first char of s must be '='.
1128 * 2. if the remainder matches one of the supplied keywords,
1129 * the index (1 based) of the keyword is negated and returned.
1130 * 3. if the remainder is a series of no more than max_vals numbers
1131 * separated by commas, the numbers are saved in vals[] and a
1132 * count of how many were saved is returned. Base10 is assumed,
1133 * and base16 is allowed when prefixed with "0x".
1134 * 4. otherwise, zero is returned.
1135 */
1136 static int __init match_parm (char *s, const char *keywords[], int vals[], int max_vals)
1137 {
1138 static const char *decimal = "0123456789";
1139 static const char *hex = "0123456789abcdef";
1140 int i, n;
1141
1142 if (*s++ == '=') {
1143 /*
1144 * Try matching against the supplied keywords,
1145 * and return -(index+1) if we match one
1146 */
1147 if (keywords != NULL) {
1148 for (i = 0; *keywords != NULL; ++i) {
1149 if (!strcmp(s, *keywords++))
1150 return -(i+1);
1151 }
1152 }
1153 /*
1154 * Look for a series of no more than "max_vals"
1155 * numeric values separated by commas, in base10,
1156 * or base16 when prefixed with "0x".
1157 * Return a count of how many were found.
1158 */
1159 for (n = 0; (i = stridx(decimal, *s)) >= 0;) {
1160 vals[n] = i;
1161 while ((i = stridx(decimal, *++s)) >= 0)
1162 vals[n] = (vals[n] * 10) + i;
1163 if (*s == 'x' && !vals[n]) {
1164 while ((i = stridx(hex, *++s)) >= 0)
1165 vals[n] = (vals[n] * 0x10) + i;
1166 }
1167 if (++n == max_vals)
1168 break;
1169 if (*s == ',' || *s == ';')
1170 ++s;
1171 }
1172 if (!*s)
1173 return n;
1174 }
1175 return 0; /* zero = nothing matched */
1176 }
1177
1178 extern int probe_ali14xx;
1179 extern int probe_umc8672;
1180 extern int probe_dtc2278;
1181 extern int probe_ht6560b;
1182 extern int probe_qd65xx;
1183 extern int cmd640_vlb;
1184
1185 static int __initdata is_chipset_set[MAX_HWIFS];
1186
1187 /*
1188 * ide_setup() gets called VERY EARLY during initialization,
1189 * to handle kernel "command line" strings beginning with "hdx=" or "ide".
1190 *
1191 * Remember to update Documentation/ide.txt if you change something here.
1192 */
1193 static int __init ide_setup(char *s)
1194 {
1195 int i, vals[3];
1196 ide_hwif_t *hwif;
1197 ide_drive_t *drive;
1198 unsigned int hw, unit;
1199 const char max_drive = 'a' + ((MAX_HWIFS * MAX_DRIVES) - 1);
1200 const char max_hwif = '0' + (MAX_HWIFS - 1);
1201
1202
1203 if (strncmp(s,"hd",2) == 0 && s[2] == '=') /* hd= is for hd.c */
1204 return 0; /* driver and not us */
1205
1206 if (strncmp(s,"ide",3) && strncmp(s,"idebus",6) && strncmp(s,"hd",2))
1207 return 0;
1208
1209 printk(KERN_INFO "ide_setup: %s", s);
1210 init_ide_data ();
1211
1212 #ifdef CONFIG_BLK_DEV_IDEDOUBLER
1213 if (!strcmp(s, "ide=doubler")) {
1214 extern int ide_doubler;
1215
1216 printk(" : Enabled support for IDE doublers\n");
1217 ide_doubler = 1;
1218 return 1;
1219 }
1220 #endif /* CONFIG_BLK_DEV_IDEDOUBLER */
1221
1222 if (!strcmp(s, "ide=nodma")) {
1223 printk(" : Prevented DMA\n");
1224 noautodma = 1;
1225 goto obsolete_option;
1226 }
1227
1228 #ifdef CONFIG_IDEPCI_PCIBUS_ORDER
1229 if (!strcmp(s, "ide=reverse")) {
1230 ide_scan_direction = 1;
1231 printk(" : Enabled support for IDE inverse scan order.\n");
1232 return 1;
1233 }
1234 #endif
1235
1236 #ifdef CONFIG_BLK_DEV_IDEACPI
1237 if (!strcmp(s, "ide=noacpi")) {
1238 //printk(" : Disable IDE ACPI support.\n");
1239 ide_noacpi = 1;
1240 return 1;
1241 }
1242 if (!strcmp(s, "ide=acpigtf")) {
1243 //printk(" : Enable IDE ACPI _GTF support.\n");
1244 ide_noacpitfs = 0;
1245 return 1;
1246 }
1247 if (!strcmp(s, "ide=acpionboot")) {
1248 //printk(" : Call IDE ACPI methods on boot.\n");
1249 ide_noacpionboot = 0;
1250 return 1;
1251 }
1252 #endif /* CONFIG_BLK_DEV_IDEACPI */
1253
1254 /*
1255 * Look for drive options: "hdx="
1256 */
1257 if (s[0] == 'h' && s[1] == 'd' && s[2] >= 'a' && s[2] <= max_drive) {
1258 const char *hd_words[] = {
1259 "none", "noprobe", "nowerr", "cdrom", "nodma",
1260 "autotune", "noautotune", "-8", "-9", "-10",
1261 "noflush", "remap", "remap63", "scsi", NULL };
1262 unit = s[2] - 'a';
1263 hw = unit / MAX_DRIVES;
1264 unit = unit % MAX_DRIVES;
1265 hwif = &ide_hwifs[hw];
1266 drive = &hwif->drives[unit];
1267 if (strncmp(s + 4, "ide-", 4) == 0) {
1268 strlcpy(drive->driver_req, s + 4, sizeof(drive->driver_req));
1269 goto done;
1270 }
1271 switch (match_parm(&s[3], hd_words, vals, 3)) {
1272 case -1: /* "none" */
1273 case -2: /* "noprobe" */
1274 drive->noprobe = 1;
1275 goto done;
1276 case -3: /* "nowerr" */
1277 drive->bad_wstat = BAD_R_STAT;
1278 hwif->noprobe = 0;
1279 goto done;
1280 case -4: /* "cdrom" */
1281 drive->present = 1;
1282 drive->media = ide_cdrom;
1283 /* an ATAPI device ignores DRDY */
1284 drive->ready_stat = 0;
1285 hwif->noprobe = 0;
1286 goto done;
1287 case -5: /* nodma */
1288 drive->nodma = 1;
1289 goto done;
1290 case -6: /* "autotune" */
1291 drive->autotune = IDE_TUNE_AUTO;
1292 goto obsolete_option;
1293 case -7: /* "noautotune" */
1294 drive->autotune = IDE_TUNE_NOAUTO;
1295 goto obsolete_option;
1296 case -11: /* noflush */
1297 drive->noflush = 1;
1298 goto done;
1299 case -12: /* "remap" */
1300 drive->remap_0_to_1 = 1;
1301 goto done;
1302 case -13: /* "remap63" */
1303 drive->sect0 = 63;
1304 goto done;
1305 case -14: /* "scsi" */
1306 drive->scsi = 1;
1307 goto done;
1308 case 3: /* cyl,head,sect */
1309 drive->media = ide_disk;
1310 drive->ready_stat = READY_STAT;
1311 drive->cyl = drive->bios_cyl = vals[0];
1312 drive->head = drive->bios_head = vals[1];
1313 drive->sect = drive->bios_sect = vals[2];
1314 drive->present = 1;
1315 drive->forced_geom = 1;
1316 hwif->noprobe = 0;
1317 goto done;
1318 default:
1319 goto bad_option;
1320 }
1321 }
1322
1323 if (s[0] != 'i' || s[1] != 'd' || s[2] != 'e')
1324 goto bad_option;
1325 /*
1326 * Look for bus speed option: "idebus="
1327 */
1328 if (s[3] == 'b' && s[4] == 'u' && s[5] == 's') {
1329 if (match_parm(&s[6], NULL, vals, 1) != 1)
1330 goto bad_option;
1331 if (vals[0] >= 20 && vals[0] <= 66) {
1332 idebus_parameter = vals[0];
1333 } else
1334 printk(" -- BAD BUS SPEED! Expected value from 20 to 66");
1335 goto done;
1336 }
1337 /*
1338 * Look for interface options: "idex="
1339 */
1340 if (s[3] >= '0' && s[3] <= max_hwif) {
1341 /*
1342 * Be VERY CAREFUL changing this: note hardcoded indexes below
1343 * (-8, -9, -10) are reserved to ease the hardcoding.
1344 */
1345 static const char *ide_words[] = {
1346 "noprobe", "serialize", "minus3", "minus4",
1347 "reset", "minus6", "ata66", "minus8", "minus9",
1348 "minus10", "four", "qd65xx", "ht6560b", "cmd640_vlb",
1349 "dtc2278", "umc8672", "ali14xx", NULL };
1350
1351 hw_regs_t hwregs;
1352
1353 hw = s[3] - '0';
1354 hwif = &ide_hwifs[hw];
1355 i = match_parm(&s[4], ide_words, vals, 3);
1356
1357 /*
1358 * Cryptic check to ensure chipset not already set for hwif.
1359 * Note: we can't depend on hwif->chipset here.
1360 */
1361 if ((i >= -18 && i <= -11) || (i > 0 && i <= 3)) {
1362 /* chipset already specified */
1363 if (is_chipset_set[hw])
1364 goto bad_option;
1365 if (i > -18 && i <= -11) {
1366 /* these drivers are for "ide0=" only */
1367 if (hw != 0)
1368 goto bad_hwif;
1369 /* chipset already specified for 2nd port */
1370 if (is_chipset_set[hw+1])
1371 goto bad_option;
1372 }
1373 is_chipset_set[hw] = 1;
1374 printk("\n");
1375 }
1376
1377 switch (i) {
1378 #ifdef CONFIG_BLK_DEV_ALI14XX
1379 case -17: /* "ali14xx" */
1380 probe_ali14xx = 1;
1381 goto done;
1382 #endif
1383 #ifdef CONFIG_BLK_DEV_UMC8672
1384 case -16: /* "umc8672" */
1385 probe_umc8672 = 1;
1386 goto done;
1387 #endif
1388 #ifdef CONFIG_BLK_DEV_DTC2278
1389 case -15: /* "dtc2278" */
1390 probe_dtc2278 = 1;
1391 goto done;
1392 #endif
1393 #ifdef CONFIG_BLK_DEV_CMD640
1394 case -14: /* "cmd640_vlb" */
1395 cmd640_vlb = 1;
1396 goto done;
1397 #endif
1398 #ifdef CONFIG_BLK_DEV_HT6560B
1399 case -13: /* "ht6560b" */
1400 probe_ht6560b = 1;
1401 goto done;
1402 #endif
1403 #ifdef CONFIG_BLK_DEV_QD65XX
1404 case -12: /* "qd65xx" */
1405 probe_qd65xx = 1;
1406 goto done;
1407 #endif
1408 #ifdef CONFIG_BLK_DEV_4DRIVES
1409 case -11: /* "four" drives on one set of ports */
1410 {
1411 ide_hwif_t *mate = &ide_hwifs[hw^1];
1412 mate->drives[0].select.all ^= 0x20;
1413 mate->drives[1].select.all ^= 0x20;
1414 hwif->chipset = mate->chipset = ide_4drives;
1415 mate->irq = hwif->irq;
1416 memcpy(mate->io_ports, hwif->io_ports, sizeof(hwif->io_ports));
1417 hwif->mate = mate;
1418 mate->mate = hwif;
1419 hwif->serialized = mate->serialized = 1;
1420 goto obsolete_option;
1421 }
1422 #endif /* CONFIG_BLK_DEV_4DRIVES */
1423 case -10: /* minus10 */
1424 case -9: /* minus9 */
1425 case -8: /* minus8 */
1426 case -6:
1427 case -4:
1428 case -3:
1429 goto bad_option;
1430 case -7: /* ata66 */
1431 #ifdef CONFIG_BLK_DEV_IDEPCI
1432 /*
1433 * Use ATA_CBL_PATA40_SHORT so drive side
1434 * cable detection is also overriden.
1435 */
1436 hwif->cbl = ATA_CBL_PATA40_SHORT;
1437 goto obsolete_option;
1438 #else
1439 goto bad_hwif;
1440 #endif
1441 case -5: /* "reset" */
1442 hwif->reset = 1;
1443 goto obsolete_option;
1444 case -2: /* "serialize" */
1445 hwif->mate = &ide_hwifs[hw^1];
1446 hwif->mate->mate = hwif;
1447 hwif->serialized = hwif->mate->serialized = 1;
1448 goto obsolete_option;
1449
1450 case -1: /* "noprobe" */
1451 hwif->noprobe = 1;
1452 goto done;
1453
1454 case 1: /* base */
1455 vals[1] = vals[0] + 0x206; /* default ctl */
1456 case 2: /* base,ctl */
1457 vals[2] = 0; /* default irq = probe for it */
1458 case 3: /* base,ctl,irq */
1459 memset(&hwregs, 0, sizeof(hwregs));
1460 ide_init_hwif_ports(&hwregs, vals[0], vals[1], &hwif->irq);
1461 memcpy(hwif->io_ports, hwregs.io_ports, sizeof(hwif->io_ports));
1462 hwif->irq = vals[2];
1463 hwif->noprobe = 0;
1464 hwif->chipset = ide_forced;
1465 goto obsolete_option;
1466
1467 case 0: goto bad_option;
1468 default:
1469 printk(" -- SUPPORT NOT CONFIGURED IN THIS KERNEL\n");
1470 return 1;
1471 }
1472 }
1473 bad_option:
1474 printk(" -- BAD OPTION\n");
1475 return 1;
1476 obsolete_option:
1477 printk(" -- OBSOLETE OPTION, WILL BE REMOVED SOON!\n");
1478 return 1;
1479 bad_hwif:
1480 printk("-- NOT SUPPORTED ON ide%d", hw);
1481 done:
1482 printk("\n");
1483 return 1;
1484 }
1485
1486 EXPORT_SYMBOL(ide_lock);
1487
1488 static int ide_bus_match(struct device *dev, struct device_driver *drv)
1489 {
1490 return 1;
1491 }
1492
1493 static char *media_string(ide_drive_t *drive)
1494 {
1495 switch (drive->media) {
1496 case ide_disk:
1497 return "disk";
1498 case ide_cdrom:
1499 return "cdrom";
1500 case ide_tape:
1501 return "tape";
1502 case ide_floppy:
1503 return "floppy";
1504 case ide_optical:
1505 return "optical";
1506 default:
1507 return "UNKNOWN";
1508 }
1509 }
1510
1511 static ssize_t media_show(struct device *dev, struct device_attribute *attr, char *buf)
1512 {
1513 ide_drive_t *drive = to_ide_device(dev);
1514 return sprintf(buf, "%s\n", media_string(drive));
1515 }
1516
1517 static ssize_t drivename_show(struct device *dev, struct device_attribute *attr, char *buf)
1518 {
1519 ide_drive_t *drive = to_ide_device(dev);
1520 return sprintf(buf, "%s\n", drive->name);
1521 }
1522
1523 static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf)
1524 {
1525 ide_drive_t *drive = to_ide_device(dev);
1526 return sprintf(buf, "ide:m-%s\n", media_string(drive));
1527 }
1528
1529 static ssize_t model_show(struct device *dev, struct device_attribute *attr,
1530 char *buf)
1531 {
1532 ide_drive_t *drive = to_ide_device(dev);
1533 return sprintf(buf, "%s\n", drive->id->model);
1534 }
1535
1536 static ssize_t firmware_show(struct device *dev, struct device_attribute *attr,
1537 char *buf)
1538 {
1539 ide_drive_t *drive = to_ide_device(dev);
1540 return sprintf(buf, "%s\n", drive->id->fw_rev);
1541 }
1542
1543 static ssize_t serial_show(struct device *dev, struct device_attribute *attr,
1544 char *buf)
1545 {
1546 ide_drive_t *drive = to_ide_device(dev);
1547 return sprintf(buf, "%s\n", drive->id->serial_no);
1548 }
1549
1550 static struct device_attribute ide_dev_attrs[] = {
1551 __ATTR_RO(media),
1552 __ATTR_RO(drivename),
1553 __ATTR_RO(modalias),
1554 __ATTR_RO(model),
1555 __ATTR_RO(firmware),
1556 __ATTR(serial, 0400, serial_show, NULL),
1557 __ATTR_NULL
1558 };
1559
1560 static int ide_uevent(struct device *dev, struct kobj_uevent_env *env)
1561 {
1562 ide_drive_t *drive = to_ide_device(dev);
1563
1564 add_uevent_var(env, "MEDIA=%s", media_string(drive));
1565 add_uevent_var(env, "DRIVENAME=%s", drive->name);
1566 add_uevent_var(env, "MODALIAS=ide:m-%s", media_string(drive));
1567 return 0;
1568 }
1569
1570 static int generic_ide_probe(struct device *dev)
1571 {
1572 ide_drive_t *drive = to_ide_device(dev);
1573 ide_driver_t *drv = to_ide_driver(dev->driver);
1574
1575 return drv->probe ? drv->probe(drive) : -ENODEV;
1576 }
1577
1578 static int generic_ide_remove(struct device *dev)
1579 {
1580 ide_drive_t *drive = to_ide_device(dev);
1581 ide_driver_t *drv = to_ide_driver(dev->driver);
1582
1583 if (drv->remove)
1584 drv->remove(drive);
1585
1586 return 0;
1587 }
1588
1589 static void generic_ide_shutdown(struct device *dev)
1590 {
1591 ide_drive_t *drive = to_ide_device(dev);
1592 ide_driver_t *drv = to_ide_driver(dev->driver);
1593
1594 if (dev->driver && drv->shutdown)
1595 drv->shutdown(drive);
1596 }
1597
1598 struct bus_type ide_bus_type = {
1599 .name = "ide",
1600 .match = ide_bus_match,
1601 .uevent = ide_uevent,
1602 .probe = generic_ide_probe,
1603 .remove = generic_ide_remove,
1604 .shutdown = generic_ide_shutdown,
1605 .dev_attrs = ide_dev_attrs,
1606 .suspend = generic_ide_suspend,
1607 .resume = generic_ide_resume,
1608 };
1609
1610 EXPORT_SYMBOL_GPL(ide_bus_type);
1611
1612 /*
1613 * This is gets invoked once during initialization, to set *everything* up
1614 */
1615 static int __init ide_init(void)
1616 {
1617 int ret;
1618
1619 printk(KERN_INFO "Uniform Multi-Platform E-IDE driver\n");
1620 system_bus_speed = ide_system_bus_speed();
1621
1622 printk(KERN_INFO "ide: Assuming %dMHz system bus speed "
1623 "for PIO modes%s\n", system_bus_speed,
1624 idebus_parameter ? "" : "; override with idebus=xx");
1625
1626 ret = bus_register(&ide_bus_type);
1627 if (ret < 0) {
1628 printk(KERN_WARNING "IDE: bus_register error: %d\n", ret);
1629 return ret;
1630 }
1631
1632 init_ide_data();
1633
1634 proc_ide_create();
1635
1636 return 0;
1637 }
1638
1639 #ifdef MODULE
1640 static char *options = NULL;
1641 module_param(options, charp, 0);
1642 MODULE_LICENSE("GPL");
1643
1644 static void __init parse_options (char *line)
1645 {
1646 char *next = line;
1647
1648 if (line == NULL || !*line)
1649 return;
1650 while ((line = next) != NULL) {
1651 if ((next = strchr(line,' ')) != NULL)
1652 *next++ = 0;
1653 if (!ide_setup(line))
1654 printk (KERN_INFO "Unknown option '%s'\n", line);
1655 }
1656 }
1657
1658 int __init init_module (void)
1659 {
1660 parse_options(options);
1661 return ide_init();
1662 }
1663
1664 void __exit cleanup_module (void)
1665 {
1666 int index;
1667
1668 for (index = 0; index < MAX_HWIFS; ++index)
1669 ide_unregister(index, 0, 0);
1670
1671 proc_ide_destroy();
1672
1673 bus_unregister(&ide_bus_type);
1674 }
1675
1676 #else /* !MODULE */
1677
1678 __setup("", ide_setup);
1679
1680 module_init(ide_init);
1681
1682 #endif /* MODULE */
CJK support for tty framebuffer vt