?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
udf: cleanup directory offset handling
[wrt350n-kernel.git] / drivers / ide / ide.c
blobad0e9955f73c9ce38de7485b487bb778b9542e87
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 REVISION "Revision: 7.00alpha2"
48
49 #define _IDE_C /* Tell ide.h it's really us */
50
51 #include <linux/module.h>
52 #include <linux/types.h>
53 #include <linux/string.h>
54 #include <linux/kernel.h>
55 #include <linux/timer.h>
56 #include <linux/mm.h>
57 #include <linux/interrupt.h>
58 #include <linux/major.h>
59 #include <linux/errno.h>
60 #include <linux/genhd.h>
61 #include <linux/blkpg.h>
62 #include <linux/slab.h>
63 #include <linux/init.h>
64 #include <linux/pci.h>
65 #include <linux/delay.h>
66 #include <linux/ide.h>
67 #include <linux/completion.h>
68 #include <linux/reboot.h>
69 #include <linux/cdrom.h>
70 #include <linux/seq_file.h>
71 #include <linux/device.h>
72 #include <linux/bitops.h>
73
74 #include <asm/byteorder.h>
75 #include <asm/irq.h>
76 #include <asm/uaccess.h>
77 #include <asm/io.h>
78
79
80 /* default maximum number of failures */
81 #define IDE_DEFAULT_MAX_FAILURES 1
82
83 static const u8 ide_hwif_to_major[] = { IDE0_MAJOR, IDE1_MAJOR,
84 IDE2_MAJOR, IDE3_MAJOR,
85 IDE4_MAJOR, IDE5_MAJOR,
86 IDE6_MAJOR, IDE7_MAJOR,
87 IDE8_MAJOR, IDE9_MAJOR };
88
89 static int idebus_parameter; /* holds the "idebus=" parameter */
90 static int system_bus_speed; /* holds what we think is VESA/PCI bus speed */
91
92 DEFINE_MUTEX(ide_cfg_mtx);
93 __cacheline_aligned_in_smp DEFINE_SPINLOCK(ide_lock);
94
95 #ifdef CONFIG_IDEPCI_PCIBUS_ORDER
96 int ide_scan_direction; /* THIS was formerly 2.2.x pci=reverse */
97 #endif
98
99 int noautodma = 0;
100
101 #ifdef CONFIG_BLK_DEV_IDEACPI
102 int ide_noacpi = 0;
103 int ide_noacpitfs = 1;
104 int ide_noacpionboot = 1;
105 #endif
106
107 /*
108 * This is declared extern in ide.h, for access by other IDE modules:
109 */
110 ide_hwif_t ide_hwifs[MAX_HWIFS]; /* master data repository */
111
112 EXPORT_SYMBOL(ide_hwifs);
113
114 /*
115 * Do not even *think* about calling this!
116 */
117 void ide_init_port_data(ide_hwif_t *hwif, unsigned int index)
118 {
119 unsigned int unit;
120
121 /* bulk initialize hwif & drive info with zeros */
122 memset(hwif, 0, sizeof(ide_hwif_t));
123
124 /* fill in any non-zero initial values */
125 hwif->index = index;
126 hwif->major = ide_hwif_to_major[index];
127
128 hwif->name[0] = 'i';
129 hwif->name[1] = 'd';
130 hwif->name[2] = 'e';
131 hwif->name[3] = '0' + index;
132
133 hwif->bus_state = BUSSTATE_ON;
134
135 init_completion(&hwif->gendev_rel_comp);
136
137 default_hwif_iops(hwif);
138 default_hwif_transport(hwif);
139 for (unit = 0; unit < MAX_DRIVES; ++unit) {
140 ide_drive_t *drive = &hwif->drives[unit];
141
142 drive->media = ide_disk;
143 drive->select.all = (unit<<4)|0xa0;
144 drive->hwif = hwif;
145 drive->ctl = 0x08;
146 drive->ready_stat = READY_STAT;
147 drive->bad_wstat = BAD_W_STAT;
148 drive->special.b.recalibrate = 1;
149 drive->special.b.set_geometry = 1;
150 drive->name[0] = 'h';
151 drive->name[1] = 'd';
152 drive->name[2] = 'a' + (index * MAX_DRIVES) + unit;
153 drive->max_failures = IDE_DEFAULT_MAX_FAILURES;
154 drive->using_dma = 0;
155 drive->vdma = 0;
156 INIT_LIST_HEAD(&drive->list);
157 init_completion(&drive->gendev_rel_comp);
158 }
159 }
160 EXPORT_SYMBOL_GPL(ide_init_port_data);
161
162 static void init_hwif_default(ide_hwif_t *hwif, unsigned int index)
163 {
164 hw_regs_t hw;
165
166 memset(&hw, 0, sizeof(hw_regs_t));
167
168 ide_init_hwif_ports(&hw, ide_default_io_base(index), 0, &hwif->irq);
169
170 memcpy(hwif->io_ports, hw.io_ports, sizeof(hw.io_ports));
171
172 hwif->noprobe = !hwif->io_ports[IDE_DATA_OFFSET];
173 #ifdef CONFIG_BLK_DEV_HD
174 if (hwif->io_ports[IDE_DATA_OFFSET] == HD_DATA)
175 hwif->noprobe = 1; /* may be overridden by ide_setup() */
176 #endif
177 }
178
179 /*
180 * init_ide_data() sets reasonable default values into all fields
181 * of all instances of the hwifs and drives, but only on the first call.
182 * Subsequent calls have no effect (they don't wipe out anything).
183 *
184 * This routine is normally called at driver initialization time,
185 * but may also be called MUCH earlier during kernel "command-line"
186 * parameter processing. As such, we cannot depend on any other parts
187 * of the kernel (such as memory allocation) to be functioning yet.
188 *
189 * This is too bad, as otherwise we could dynamically allocate the
190 * ide_drive_t structs as needed, rather than always consuming memory
191 * for the max possible number (MAX_HWIFS * MAX_DRIVES) of them.
192 *
193 * FIXME: We should stuff the setup data into __init and copy the
194 * relevant hwifs/allocate them properly during boot.
195 */
196 #define MAGIC_COOKIE 0x12345678
197 static void __init init_ide_data (void)
198 {
199 ide_hwif_t *hwif;
200 unsigned int index;
201 static unsigned long magic_cookie = MAGIC_COOKIE;
202
203 if (magic_cookie != MAGIC_COOKIE)
204 return; /* already initialized */
205 magic_cookie = 0;
206
207 /* Initialise all interface structures */
208 for (index = 0; index < MAX_HWIFS; ++index) {
209 hwif = &ide_hwifs[index];
210 ide_init_port_data(hwif, index);
211 init_hwif_default(hwif, index);
212 #if !defined(CONFIG_PPC32) || !defined(CONFIG_PCI)
213 hwif->irq =
214 ide_init_default_irq(hwif->io_ports[IDE_DATA_OFFSET]);
215 #endif
216 }
217 }
218
219 /**
220 * ide_system_bus_speed - guess bus speed
221 *
222 * ide_system_bus_speed() returns what we think is the system VESA/PCI
223 * bus speed (in MHz). This is used for calculating interface PIO timings.
224 * The default is 40 for known PCI systems, 50 otherwise.
225 * The "idebus=xx" parameter can be used to override this value.
226 * The actual value to be used is computed/displayed the first time
227 * through. Drivers should only use this as a last resort.
228 *
229 * Returns a guessed speed in MHz.
230 */
231
232 static int ide_system_bus_speed(void)
233 {
234 #ifdef CONFIG_PCI
235 static struct pci_device_id pci_default[] = {
236 { PCI_DEVICE(PCI_ANY_ID, PCI_ANY_ID) },
237 { }
238 };
239 #else
240 #define pci_default 0
241 #endif /* CONFIG_PCI */
242
243 /* user supplied value */
244 if (idebus_parameter)
245 return idebus_parameter;
246
247 /* safe default value for PCI or VESA and PCI*/
248 return pci_dev_present(pci_default) ? 33 : 50;
249 }
250
251 ide_hwif_t * ide_find_port(unsigned long base)
252 {
253 ide_hwif_t *hwif;
254 int i;
255
256 for (i = 0; i < MAX_HWIFS; i++) {
257 hwif = &ide_hwifs[i];
258 if (hwif->io_ports[IDE_DATA_OFFSET] == base)
259 goto found;
260 }
261
262 for (i = 0; i < MAX_HWIFS; i++) {
263 hwif = &ide_hwifs[i];
264 if (hwif->io_ports[IDE_DATA_OFFSET] == 0)
265 goto found;
266 }
267
268 hwif = NULL;
269 found:
270 return hwif;
271 }
272
273 EXPORT_SYMBOL_GPL(ide_find_port);
274
275 static struct resource* hwif_request_region(ide_hwif_t *hwif,
276 unsigned long addr, int num)
277 {
278 struct resource *res = request_region(addr, num, hwif->name);
279
280 if (!res)
281 printk(KERN_ERR "%s: I/O resource 0x%lX-0x%lX not free.\n",
282 hwif->name, addr, addr+num-1);
283 return res;
284 }
285
286 /**
287 * ide_hwif_request_regions - request resources for IDE
288 * @hwif: interface to use
289 *
290 * Requests all the needed resources for an interface.
291 * Right now core IDE code does this work which is deeply wrong.
292 * MMIO leaves it to the controller driver,
293 * PIO will migrate this way over time.
294 */
295
296 int ide_hwif_request_regions(ide_hwif_t *hwif)
297 {
298 unsigned long addr;
299 unsigned int i;
300
301 if (hwif->mmio)
302 return 0;
303 addr = hwif->io_ports[IDE_CONTROL_OFFSET];
304 if (addr && !hwif_request_region(hwif, addr, 1))
305 goto control_region_busy;
306 hwif->straight8 = 0;
307 addr = hwif->io_ports[IDE_DATA_OFFSET];
308 if ((addr | 7) == hwif->io_ports[IDE_STATUS_OFFSET]) {
309 if (!hwif_request_region(hwif, addr, 8))
310 goto data_region_busy;
311 hwif->straight8 = 1;
312 return 0;
313 }
314 for (i = IDE_DATA_OFFSET; i <= IDE_STATUS_OFFSET; i++) {
315 addr = hwif->io_ports[i];
316 if (!hwif_request_region(hwif, addr, 1)) {
317 while (--i)
318 release_region(addr, 1);
319 goto data_region_busy;
320 }
321 }
322 return 0;
323
324 data_region_busy:
325 addr = hwif->io_ports[IDE_CONTROL_OFFSET];
326 if (addr)
327 release_region(addr, 1);
328 control_region_busy:
329 /* If any errors are return, we drop the hwif interface. */
330 return -EBUSY;
331 }
332
333 /**
334 * ide_hwif_release_regions - free IDE resources
335 *
336 * Note that we only release the standard ports,
337 * and do not even try to handle any extra ports
338 * allocated for weird IDE interface chipsets.
339 *
340 * Note also that we don't yet handle mmio resources here. More
341 * importantly our caller should be doing this so we need to
342 * restructure this as a helper function for drivers.
343 */
344
345 void ide_hwif_release_regions(ide_hwif_t *hwif)
346 {
347 u32 i = 0;
348
349 if (hwif->mmio)
350 return;
351 if (hwif->io_ports[IDE_CONTROL_OFFSET])
352 release_region(hwif->io_ports[IDE_CONTROL_OFFSET], 1);
353 if (hwif->straight8) {
354 release_region(hwif->io_ports[IDE_DATA_OFFSET], 8);
355 return;
356 }
357 for (i = IDE_DATA_OFFSET; i <= IDE_STATUS_OFFSET; i++)
358 if (hwif->io_ports[i])
359 release_region(hwif->io_ports[i], 1);
360 }
361
362 /**
363 * ide_hwif_restore - restore hwif to template
364 * @hwif: hwif to update
365 * @tmp_hwif: template
366 *
367 * Restore hwif to a previous state by copying most settings
368 * from the template.
369 */
370
371 static void ide_hwif_restore(ide_hwif_t *hwif, ide_hwif_t *tmp_hwif)
372 {
373 hwif->hwgroup = tmp_hwif->hwgroup;
374
375 hwif->gendev.parent = tmp_hwif->gendev.parent;
376
377 hwif->proc = tmp_hwif->proc;
378
379 hwif->major = tmp_hwif->major;
380 hwif->straight8 = tmp_hwif->straight8;
381 hwif->bus_state = tmp_hwif->bus_state;
382
383 hwif->host_flags = tmp_hwif->host_flags;
384
385 hwif->pio_mask = tmp_hwif->pio_mask;
386
387 hwif->ultra_mask = tmp_hwif->ultra_mask;
388 hwif->mwdma_mask = tmp_hwif->mwdma_mask;
389 hwif->swdma_mask = tmp_hwif->swdma_mask;
390
391 hwif->cbl = tmp_hwif->cbl;
392
393 hwif->chipset = tmp_hwif->chipset;
394 hwif->hold = tmp_hwif->hold;
395
396 hwif->dev = tmp_hwif->dev;
397
398 #ifdef CONFIG_BLK_DEV_IDEPCI
399 hwif->cds = tmp_hwif->cds;
400 #endif
401
402 hwif->set_pio_mode = tmp_hwif->set_pio_mode;
403 hwif->set_dma_mode = tmp_hwif->set_dma_mode;
404 hwif->mdma_filter = tmp_hwif->mdma_filter;
405 hwif->udma_filter = tmp_hwif->udma_filter;
406 hwif->selectproc = tmp_hwif->selectproc;
407 hwif->reset_poll = tmp_hwif->reset_poll;
408 hwif->pre_reset = tmp_hwif->pre_reset;
409 hwif->resetproc = tmp_hwif->resetproc;
410 hwif->maskproc = tmp_hwif->maskproc;
411 hwif->quirkproc = tmp_hwif->quirkproc;
412 hwif->busproc = tmp_hwif->busproc;
413
414 hwif->ata_input_data = tmp_hwif->ata_input_data;
415 hwif->ata_output_data = tmp_hwif->ata_output_data;
416 hwif->atapi_input_bytes = tmp_hwif->atapi_input_bytes;
417 hwif->atapi_output_bytes = tmp_hwif->atapi_output_bytes;
418
419 hwif->dma_host_set = tmp_hwif->dma_host_set;
420 hwif->dma_setup = tmp_hwif->dma_setup;
421 hwif->dma_exec_cmd = tmp_hwif->dma_exec_cmd;
422 hwif->dma_start = tmp_hwif->dma_start;
423 hwif->ide_dma_end = tmp_hwif->ide_dma_end;
424 hwif->ide_dma_test_irq = tmp_hwif->ide_dma_test_irq;
425 hwif->ide_dma_clear_irq = tmp_hwif->ide_dma_clear_irq;
426 hwif->dma_lost_irq = tmp_hwif->dma_lost_irq;
427 hwif->dma_timeout = tmp_hwif->dma_timeout;
428
429 hwif->OUTB = tmp_hwif->OUTB;
430 hwif->OUTBSYNC = tmp_hwif->OUTBSYNC;
431 hwif->OUTW = tmp_hwif->OUTW;
432 hwif->OUTSW = tmp_hwif->OUTSW;
433 hwif->OUTSL = tmp_hwif->OUTSL;
434
435 hwif->INB = tmp_hwif->INB;
436 hwif->INW = tmp_hwif->INW;
437 hwif->INSW = tmp_hwif->INSW;
438 hwif->INSL = tmp_hwif->INSL;
439
440 hwif->sg_max_nents = tmp_hwif->sg_max_nents;
441
442 hwif->mmio = tmp_hwif->mmio;
443 hwif->rqsize = tmp_hwif->rqsize;
444
445 #ifndef CONFIG_BLK_DEV_IDECS
446 hwif->irq = tmp_hwif->irq;
447 #endif
448
449 hwif->dma_base = tmp_hwif->dma_base;
450 hwif->dma_command = tmp_hwif->dma_command;
451 hwif->dma_vendor1 = tmp_hwif->dma_vendor1;
452 hwif->dma_status = tmp_hwif->dma_status;
453 hwif->dma_vendor3 = tmp_hwif->dma_vendor3;
454 hwif->dma_prdtable = tmp_hwif->dma_prdtable;
455
456 hwif->config_data = tmp_hwif->config_data;
457 hwif->select_data = tmp_hwif->select_data;
458 hwif->extra_base = tmp_hwif->extra_base;
459 hwif->extra_ports = tmp_hwif->extra_ports;
460
461 hwif->hwif_data = tmp_hwif->hwif_data;
462 }
463
464 void ide_remove_port_from_hwgroup(ide_hwif_t *hwif)
465 {
466 ide_hwgroup_t *hwgroup = hwif->hwgroup;
467
468 spin_lock_irq(&ide_lock);
469 /*
470 * Remove us from the hwgroup, and free
471 * the hwgroup if we were the only member
472 */
473 if (hwif->next == hwif) {
474 BUG_ON(hwgroup->hwif != hwif);
475 kfree(hwgroup);
476 } else {
477 /* There is another interface in hwgroup.
478 * Unlink us, and set hwgroup->drive and ->hwif to
479 * something sane.
480 */
481 ide_hwif_t *g = hwgroup->hwif;
482
483 while (g->next != hwif)
484 g = g->next;
485 g->next = hwif->next;
486 if (hwgroup->hwif == hwif) {
487 /* Chose a random hwif for hwgroup->hwif.
488 * It's guaranteed that there are no drives
489 * left in the hwgroup.
490 */
491 BUG_ON(hwgroup->drive != NULL);
492 hwgroup->hwif = g;
493 }
494 BUG_ON(hwgroup->hwif == hwif);
495 }
496 spin_unlock_irq(&ide_lock);
497 }
498
499 /**
500 * ide_unregister - free an IDE interface
501 * @index: index of interface (will change soon to a pointer)
502 * @init_default: init default hwif flag
503 * @restore: restore hwif flag
504 *
505 * Perform the final unregister of an IDE interface. At the moment
506 * we don't refcount interfaces so this will also get split up.
507 *
508 * Locking:
509 * The caller must not hold the IDE locks
510 * The drive present/vanishing is not yet properly locked
511 * Take care with the callbacks. These have been split to avoid
512 * deadlocking the IDE layer. The shutdown callback is called
513 * before we take the lock and free resources. It is up to the
514 * caller to be sure there is no pending I/O here, and that
515 * the interface will not be reopened (present/vanishing locking
516 * isn't yet done BTW). After we commit to the final kill we
517 * call the cleanup callback with the ide locks held.
518 *
519 * Unregister restores the hwif structures to the default state.
520 * This is raving bonkers.
521 */
522
523 void ide_unregister(unsigned int index, int init_default, int restore)
524 {
525 ide_drive_t *drive;
526 ide_hwif_t *hwif, *g;
527 static ide_hwif_t tmp_hwif; /* protected by ide_cfg_mtx */
528 ide_hwgroup_t *hwgroup;
529 int irq_count = 0, unit;
530
531 BUG_ON(index >= MAX_HWIFS);
532
533 BUG_ON(in_interrupt());
534 BUG_ON(irqs_disabled());
535 mutex_lock(&ide_cfg_mtx);
536 spin_lock_irq(&ide_lock);
537 hwif = &ide_hwifs[index];
538 if (!hwif->present)
539 goto abort;
540 for (unit = 0; unit < MAX_DRIVES; ++unit) {
541 drive = &hwif->drives[unit];
542 if (!drive->present)
543 continue;
544 spin_unlock_irq(&ide_lock);
545 device_unregister(&drive->gendev);
546 wait_for_completion(&drive->gendev_rel_comp);
547 spin_lock_irq(&ide_lock);
548 }
549 hwif->present = 0;
550
551 spin_unlock_irq(&ide_lock);
552
553 ide_proc_unregister_port(hwif);
554
555 hwgroup = hwif->hwgroup;
556 /*
557 * free the irq if we were the only hwif using it
558 */
559 g = hwgroup->hwif;
560 do {
561 if (g->irq == hwif->irq)
562 ++irq_count;
563 g = g->next;
564 } while (g != hwgroup->hwif);
565 if (irq_count == 1)
566 free_irq(hwif->irq, hwgroup);
567
568 ide_remove_port_from_hwgroup(hwif);
569
570 device_unregister(&hwif->gendev);
571 wait_for_completion(&hwif->gendev_rel_comp);
572
573 /*
574 * Remove us from the kernel's knowledge
575 */
576 blk_unregister_region(MKDEV(hwif->major, 0), MAX_DRIVES<<PARTN_BITS);
577 kfree(hwif->sg_table);
578 unregister_blkdev(hwif->major, hwif->name);
579 spin_lock_irq(&ide_lock);
580
581 if (hwif->dma_base) {
582 (void) ide_release_dma(hwif);
583
584 hwif->dma_base = 0;
585 hwif->dma_command = 0;
586 hwif->dma_vendor1 = 0;
587 hwif->dma_status = 0;
588 hwif->dma_vendor3 = 0;
589 hwif->dma_prdtable = 0;
590
591 hwif->extra_base = 0;
592 hwif->extra_ports = 0;
593 }
594
595 /*
596 * Note that we only release the standard ports,
597 * and do not even try to handle any extra ports
598 * allocated for weird IDE interface chipsets.
599 */
600 ide_hwif_release_regions(hwif);
601
602 /* copy original settings */
603 tmp_hwif = *hwif;
604
605 /* restore hwif data to pristine status */
606 ide_init_port_data(hwif, index);
607
608 if (init_default)
609 init_hwif_default(hwif, index);
610
611 if (restore)
612 ide_hwif_restore(hwif, &tmp_hwif);
613
614 abort:
615 spin_unlock_irq(&ide_lock);
616 mutex_unlock(&ide_cfg_mtx);
617 }
618
619 EXPORT_SYMBOL(ide_unregister);
620
621 void ide_init_port_hw(ide_hwif_t *hwif, hw_regs_t *hw)
622 {
623 memcpy(hwif->io_ports, hw->io_ports, sizeof(hwif->io_ports));
624 hwif->irq = hw->irq;
625 hwif->noprobe = 0;
626 hwif->chipset = hw->chipset;
627 hwif->gendev.parent = hw->dev;
628 hwif->ack_intr = hw->ack_intr;
629 }
630 EXPORT_SYMBOL_GPL(ide_init_port_hw);
631
632 ide_hwif_t *ide_deprecated_find_port(unsigned long base)
633 {
634 ide_hwif_t *hwif;
635 int i;
636
637 for (i = 0; i < MAX_HWIFS; i++) {
638 hwif = &ide_hwifs[i];
639 if (hwif->io_ports[IDE_DATA_OFFSET] == base)
640 goto found;
641 }
642
643 for (i = 0; i < MAX_HWIFS; i++) {
644 hwif = &ide_hwifs[i];
645 if (hwif->hold)
646 continue;
647 if (!hwif->present && hwif->mate == NULL)
648 goto found;
649 }
650
651 hwif = NULL;
652 found:
653 return hwif;
654 }
655 EXPORT_SYMBOL_GPL(ide_deprecated_find_port);
656
657 /**
658 * ide_register_hw - register IDE interface
659 * @hw: hardware registers
660 * @quirkproc: quirkproc function
661 * @hwifp: pointer to returned hwif
662 *
663 * Register an IDE interface, specifying exactly the registers etc.
664 *
665 * Returns -1 on error.
666 */
667
668 int ide_register_hw(hw_regs_t *hw, void (*quirkproc)(ide_drive_t *),
669 ide_hwif_t **hwifp)
670 {
671 int index, retry = 1;
672 ide_hwif_t *hwif;
673 u8 idx[4] = { 0xff, 0xff, 0xff, 0xff };
674
675 do {
676 hwif = ide_deprecated_find_port(hw->io_ports[IDE_DATA_OFFSET]);
677 index = hwif->index;
678 if (hwif)
679 goto found;
680 for (index = 0; index < MAX_HWIFS; index++)
681 ide_unregister(index, 1, 1);
682 } while (retry--);
683 return -1;
684 found:
685 if (hwif->present)
686 ide_unregister(index, 0, 1);
687 else if (!hwif->hold)
688 ide_init_port_data(hwif, index);
689
690 ide_init_port_hw(hwif, hw);
691 hwif->quirkproc = quirkproc;
692
693 idx[0] = index;
694
695 ide_device_add(idx, NULL);
696
697 if (hwifp)
698 *hwifp = hwif;
699
700 return hwif->present ? index : -1;
701 }
702
703 EXPORT_SYMBOL(ide_register_hw);
704
705 /*
706 * Locks for IDE setting functionality
707 */
708
709 DEFINE_MUTEX(ide_setting_mtx);
710
711 EXPORT_SYMBOL_GPL(ide_setting_mtx);
712
713 /**
714 * ide_spin_wait_hwgroup - wait for group
715 * @drive: drive in the group
716 *
717 * Wait for an IDE device group to go non busy and then return
718 * holding the ide_lock which guards the hwgroup->busy status
719 * and right to use it.
720 */
721
722 int ide_spin_wait_hwgroup (ide_drive_t *drive)
723 {
724 ide_hwgroup_t *hwgroup = HWGROUP(drive);
725 unsigned long timeout = jiffies + (3 * HZ);
726
727 spin_lock_irq(&ide_lock);
728
729 while (hwgroup->busy) {
730 unsigned long lflags;
731 spin_unlock_irq(&ide_lock);
732 local_irq_set(lflags);
733 if (time_after(jiffies, timeout)) {
734 local_irq_restore(lflags);
735 printk(KERN_ERR "%s: channel busy\n", drive->name);
736 return -EBUSY;
737 }
738 local_irq_restore(lflags);
739 spin_lock_irq(&ide_lock);
740 }
741 return 0;
742 }
743
744 EXPORT_SYMBOL(ide_spin_wait_hwgroup);
745
746 int set_io_32bit(ide_drive_t *drive, int arg)
747 {
748 if (drive->no_io_32bit)
749 return -EPERM;
750
751 if (arg < 0 || arg > 1 + (SUPPORT_VLB_SYNC << 1))
752 return -EINVAL;
753
754 if (ide_spin_wait_hwgroup(drive))
755 return -EBUSY;
756
757 drive->io_32bit = arg;
758
759 spin_unlock_irq(&ide_lock);
760
761 return 0;
762 }
763
764 static int set_ksettings(ide_drive_t *drive, int arg)
765 {
766 if (arg < 0 || arg > 1)
767 return -EINVAL;
768
769 if (ide_spin_wait_hwgroup(drive))
770 return -EBUSY;
771 drive->keep_settings = arg;
772 spin_unlock_irq(&ide_lock);
773
774 return 0;
775 }
776
777 int set_using_dma(ide_drive_t *drive, int arg)
778 {
779 #ifdef CONFIG_BLK_DEV_IDEDMA
780 ide_hwif_t *hwif = drive->hwif;
781 int err = -EPERM;
782
783 if (arg < 0 || arg > 1)
784 return -EINVAL;
785
786 if (!drive->id || !(drive->id->capability & 1))
787 goto out;
788
789 if (hwif->dma_host_set == NULL)
790 goto out;
791
792 err = -EBUSY;
793 if (ide_spin_wait_hwgroup(drive))
794 goto out;
795 /*
796 * set ->busy flag, unlock and let it ride
797 */
798 hwif->hwgroup->busy = 1;
799 spin_unlock_irq(&ide_lock);
800
801 err = 0;
802
803 if (arg) {
804 if (ide_set_dma(drive))
805 err = -EIO;
806 } else
807 ide_dma_off(drive);
808
809 /*
810 * lock, clear ->busy flag and unlock before leaving
811 */
812 spin_lock_irq(&ide_lock);
813 hwif->hwgroup->busy = 0;
814 spin_unlock_irq(&ide_lock);
815 out:
816 return err;
817 #else
818 if (arg < 0 || arg > 1)
819 return -EINVAL;
820
821 return -EPERM;
822 #endif
823 }
824
825 int set_pio_mode(ide_drive_t *drive, int arg)
826 {
827 struct request rq;
828
829 if (arg < 0 || arg > 255)
830 return -EINVAL;
831
832 if (drive->hwif->set_pio_mode == NULL)
833 return -ENOSYS;
834
835 if (drive->special.b.set_tune)
836 return -EBUSY;
837
838 ide_init_drive_cmd(&rq);
839 rq.cmd_type = REQ_TYPE_ATA_TASKFILE;
840
841 drive->tune_req = (u8) arg;
842 drive->special.b.set_tune = 1;
843 (void) ide_do_drive_cmd(drive, &rq, ide_wait);
844 return 0;
845 }
846
847 static int set_unmaskirq(ide_drive_t *drive, int arg)
848 {
849 if (drive->no_unmask)
850 return -EPERM;
851
852 if (arg < 0 || arg > 1)
853 return -EINVAL;
854
855 if (ide_spin_wait_hwgroup(drive))
856 return -EBUSY;
857 drive->unmask = arg;
858 spin_unlock_irq(&ide_lock);
859
860 return 0;
861 }
862
863 /**
864 * system_bus_clock - clock guess
865 *
866 * External version of the bus clock guess used by very old IDE drivers
867 * for things like VLB timings. Should not be used.
868 */
869
870 int system_bus_clock (void)
871 {
872 return system_bus_speed;
873 }
874
875 EXPORT_SYMBOL(system_bus_clock);
876
877 static int generic_ide_suspend(struct device *dev, pm_message_t mesg)
878 {
879 ide_drive_t *drive = dev->driver_data;
880 ide_hwif_t *hwif = HWIF(drive);
881 struct request rq;
882 struct request_pm_state rqpm;
883 ide_task_t args;
884 int ret;
885
886 /* Call ACPI _GTM only once */
887 if (!(drive->dn % 2))
888 ide_acpi_get_timing(hwif);
889
890 memset(&rq, 0, sizeof(rq));
891 memset(&rqpm, 0, sizeof(rqpm));
892 memset(&args, 0, sizeof(args));
893 rq.cmd_type = REQ_TYPE_PM_SUSPEND;
894 rq.special = &args;
895 rq.data = &rqpm;
896 rqpm.pm_step = ide_pm_state_start_suspend;
897 if (mesg.event == PM_EVENT_PRETHAW)
898 mesg.event = PM_EVENT_FREEZE;
899 rqpm.pm_state = mesg.event;
900
901 ret = ide_do_drive_cmd(drive, &rq, ide_wait);
902 /* only call ACPI _PS3 after both drivers are suspended */
903 if (!ret && (((drive->dn % 2) && hwif->drives[0].present
904 && hwif->drives[1].present)
905 || !hwif->drives[0].present
906 || !hwif->drives[1].present))
907 ide_acpi_set_state(hwif, 0);
908 return ret;
909 }
910
911 static int generic_ide_resume(struct device *dev)
912 {
913 ide_drive_t *drive = dev->driver_data;
914 ide_hwif_t *hwif = HWIF(drive);
915 struct request rq;
916 struct request_pm_state rqpm;
917 ide_task_t args;
918 int err;
919
920 /* Call ACPI _STM only once */
921 if (!(drive->dn % 2)) {
922 ide_acpi_set_state(hwif, 1);
923 ide_acpi_push_timing(hwif);
924 }
925
926 ide_acpi_exec_tfs(drive);
927
928 memset(&rq, 0, sizeof(rq));
929 memset(&rqpm, 0, sizeof(rqpm));
930 memset(&args, 0, sizeof(args));
931 rq.cmd_type = REQ_TYPE_PM_RESUME;
932 rq.special = &args;
933 rq.data = &rqpm;
934 rqpm.pm_step = ide_pm_state_start_resume;
935 rqpm.pm_state = PM_EVENT_ON;
936
937 err = ide_do_drive_cmd(drive, &rq, ide_head_wait);
938
939 if (err == 0 && dev->driver) {
940 ide_driver_t *drv = to_ide_driver(dev->driver);
941
942 if (drv->resume)
943 drv->resume(drive);
944 }
945
946 return err;
947 }
948
949 int generic_ide_ioctl(ide_drive_t *drive, struct file *file, struct block_device *bdev,
950 unsigned int cmd, unsigned long arg)
951 {
952 unsigned long flags;
953 ide_driver_t *drv;
954 void __user *p = (void __user *)arg;
955 int err = 0, (*setfunc)(ide_drive_t *, int);
956 u8 *val;
957
958 switch (cmd) {
959 case HDIO_GET_32BIT: val = &drive->io_32bit; goto read_val;
960 case HDIO_GET_KEEPSETTINGS: val = &drive->keep_settings; goto read_val;
961 case HDIO_GET_UNMASKINTR: val = &drive->unmask; goto read_val;
962 case HDIO_GET_DMA: val = &drive->using_dma; goto read_val;
963 case HDIO_SET_32BIT: setfunc = set_io_32bit; goto set_val;
964 case HDIO_SET_KEEPSETTINGS: setfunc = set_ksettings; goto set_val;
965 case HDIO_SET_PIO_MODE: setfunc = set_pio_mode; goto set_val;
966 case HDIO_SET_UNMASKINTR: setfunc = set_unmaskirq; goto set_val;
967 case HDIO_SET_DMA: setfunc = set_using_dma; goto set_val;
968 }
969
970 switch (cmd) {
971 case HDIO_OBSOLETE_IDENTITY:
972 case HDIO_GET_IDENTITY:
973 if (bdev != bdev->bd_contains)
974 return -EINVAL;
975 if (drive->id_read == 0)
976 return -ENOMSG;
977 if (copy_to_user(p, drive->id, (cmd == HDIO_GET_IDENTITY) ? sizeof(*drive->id) : 142))
978 return -EFAULT;
979 return 0;
980
981 case HDIO_GET_NICE:
982 return put_user(drive->dsc_overlap << IDE_NICE_DSC_OVERLAP |
983 drive->atapi_overlap << IDE_NICE_ATAPI_OVERLAP |
984 drive->nice1 << IDE_NICE_1,
985 (long __user *) arg);
986 #ifdef CONFIG_IDE_TASK_IOCTL
987 case HDIO_DRIVE_TASKFILE:
988 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
989 return -EACCES;
990 switch(drive->media) {
991 case ide_disk:
992 return ide_taskfile_ioctl(drive, cmd, arg);
993 default:
994 return -ENOMSG;
995 }
996 #endif /* CONFIG_IDE_TASK_IOCTL */
997
998 case HDIO_DRIVE_CMD:
999 if (!capable(CAP_SYS_RAWIO))
1000 return -EACCES;
1001 return ide_cmd_ioctl(drive, cmd, arg);
1002
1003 case HDIO_DRIVE_TASK:
1004 if (!capable(CAP_SYS_RAWIO))
1005 return -EACCES;
1006 return ide_task_ioctl(drive, cmd, arg);
1007
1008 case HDIO_SCAN_HWIF:
1009 {
1010 hw_regs_t hw;
1011 int args[3];
1012 if (!capable(CAP_SYS_RAWIO)) return -EACCES;
1013 if (copy_from_user(args, p, 3 * sizeof(int)))
1014 return -EFAULT;
1015 memset(&hw, 0, sizeof(hw));
1016 ide_init_hwif_ports(&hw, (unsigned long) args[0],
1017 (unsigned long) args[1], NULL);
1018 hw.irq = args[2];
1019 if (ide_register_hw(&hw, NULL, NULL) == -1)
1020 return -EIO;
1021 return 0;
1022 }
1023 case HDIO_UNREGISTER_HWIF:
1024 if (!capable(CAP_SYS_RAWIO)) return -EACCES;
1025 /* (arg > MAX_HWIFS) checked in function */
1026 ide_unregister(arg, 1, 1);
1027 return 0;
1028 case HDIO_SET_NICE:
1029 if (!capable(CAP_SYS_ADMIN)) return -EACCES;
1030 if (arg != (arg & ((1 << IDE_NICE_DSC_OVERLAP) | (1 << IDE_NICE_1))))
1031 return -EPERM;
1032 drive->dsc_overlap = (arg >> IDE_NICE_DSC_OVERLAP) & 1;
1033 drv = *(ide_driver_t **)bdev->bd_disk->private_data;
1034 if (drive->dsc_overlap && !drv->supports_dsc_overlap) {
1035 drive->dsc_overlap = 0;
1036 return -EPERM;
1037 }
1038 drive->nice1 = (arg >> IDE_NICE_1) & 1;
1039 return 0;
1040 case HDIO_DRIVE_RESET:
1041 {
1042 unsigned long flags;
1043 if (!capable(CAP_SYS_ADMIN)) return -EACCES;
1044
1045 /*
1046 * Abort the current command on the
1047 * group if there is one, taking
1048 * care not to allow anything else
1049 * to be queued and to die on the
1050 * spot if we miss one somehow
1051 */
1052
1053 spin_lock_irqsave(&ide_lock, flags);
1054
1055 if (HWGROUP(drive)->resetting) {
1056 spin_unlock_irqrestore(&ide_lock, flags);
1057 return -EBUSY;
1058 }
1059
1060 ide_abort(drive, "drive reset");
1061
1062 BUG_ON(HWGROUP(drive)->handler);
1063
1064 /* Ensure nothing gets queued after we
1065 drop the lock. Reset will clear the busy */
1066
1067 HWGROUP(drive)->busy = 1;
1068 spin_unlock_irqrestore(&ide_lock, flags);
1069 (void) ide_do_reset(drive);
1070
1071 return 0;
1072 }
1073
1074 case HDIO_GET_BUSSTATE:
1075 if (!capable(CAP_SYS_ADMIN))
1076 return -EACCES;
1077 if (put_user(HWIF(drive)->bus_state, (long __user *)arg))
1078 return -EFAULT;
1079 return 0;
1080
1081 case HDIO_SET_BUSSTATE:
1082 if (!capable(CAP_SYS_ADMIN))
1083 return -EACCES;
1084 if (HWIF(drive)->busproc)
1085 return HWIF(drive)->busproc(drive, (int)arg);
1086 return -EOPNOTSUPP;
1087 default:
1088 return -EINVAL;
1089 }
1090
1091 read_val:
1092 mutex_lock(&ide_setting_mtx);
1093 spin_lock_irqsave(&ide_lock, flags);
1094 err = *val;
1095 spin_unlock_irqrestore(&ide_lock, flags);
1096 mutex_unlock(&ide_setting_mtx);
1097 return err >= 0 ? put_user(err, (long __user *)arg) : err;
1098
1099 set_val:
1100 if (bdev != bdev->bd_contains)
1101 err = -EINVAL;
1102 else {
1103 if (!capable(CAP_SYS_ADMIN))
1104 err = -EACCES;
1105 else {
1106 mutex_lock(&ide_setting_mtx);
1107 err = setfunc(drive, arg);
1108 mutex_unlock(&ide_setting_mtx);
1109 }
1110 }
1111 return err;
1112 }
1113
1114 EXPORT_SYMBOL(generic_ide_ioctl);
1115
1116 /*
1117 * stridx() returns the offset of c within s,
1118 * or -1 if c is '\0' or not found within s.
1119 */
1120 static int __init stridx (const char *s, char c)
1121 {
1122 char *i = strchr(s, c);
1123 return (i && c) ? i - s : -1;
1124 }
1125
1126 /*
1127 * match_parm() does parsing for ide_setup():
1128 *
1129 * 1. the first char of s must be '='.
1130 * 2. if the remainder matches one of the supplied keywords,
1131 * the index (1 based) of the keyword is negated and returned.
1132 * 3. if the remainder is a series of no more than max_vals numbers
1133 * separated by commas, the numbers are saved in vals[] and a
1134 * count of how many were saved is returned. Base10 is assumed,
1135 * and base16 is allowed when prefixed with "0x".
1136 * 4. otherwise, zero is returned.
1137 */
1138 static int __init match_parm (char *s, const char *keywords[], int vals[], int max_vals)
1139 {
1140 static const char *decimal = "0123456789";
1141 static const char *hex = "0123456789abcdef";
1142 int i, n;
1143
1144 if (*s++ == '=') {
1145 /*
1146 * Try matching against the supplied keywords,
1147 * and return -(index+1) if we match one
1148 */
1149 if (keywords != NULL) {
1150 for (i = 0; *keywords != NULL; ++i) {
1151 if (!strcmp(s, *keywords++))
1152 return -(i+1);
1153 }
1154 }
1155 /*
1156 * Look for a series of no more than "max_vals"
1157 * numeric values separated by commas, in base10,
1158 * or base16 when prefixed with "0x".
1159 * Return a count of how many were found.
1160 */
1161 for (n = 0; (i = stridx(decimal, *s)) >= 0;) {
1162 vals[n] = i;
1163 while ((i = stridx(decimal, *++s)) >= 0)
1164 vals[n] = (vals[n] * 10) + i;
1165 if (*s == 'x' && !vals[n]) {
1166 while ((i = stridx(hex, *++s)) >= 0)
1167 vals[n] = (vals[n] * 0x10) + i;
1168 }
1169 if (++n == max_vals)
1170 break;
1171 if (*s == ',' || *s == ';')
1172 ++s;
1173 }
1174 if (!*s)
1175 return n;
1176 }
1177 return 0; /* zero = nothing matched */
1178 }
1179
1180 extern int probe_ali14xx;
1181 extern int probe_umc8672;
1182 extern int probe_dtc2278;
1183 extern int probe_ht6560b;
1184 extern int probe_qd65xx;
1185 extern int cmd640_vlb;
1186
1187 static int __initdata is_chipset_set[MAX_HWIFS];
1188
1189 /*
1190 * ide_setup() gets called VERY EARLY during initialization,
1191 * to handle kernel "command line" strings beginning with "hdx=" or "ide".
1192 *
1193 * Remember to update Documentation/ide.txt if you change something here.
1194 */
1195 static int __init ide_setup(char *s)
1196 {
1197 int i, vals[3];
1198 ide_hwif_t *hwif;
1199 ide_drive_t *drive;
1200 unsigned int hw, unit;
1201 const char max_drive = 'a' + ((MAX_HWIFS * MAX_DRIVES) - 1);
1202 const char max_hwif = '0' + (MAX_HWIFS - 1);
1203
1204
1205 if (strncmp(s,"hd",2) == 0 && s[2] == '=') /* hd= is for hd.c */
1206 return 0; /* driver and not us */
1207
1208 if (strncmp(s,"ide",3) && strncmp(s,"idebus",6) && strncmp(s,"hd",2))
1209 return 0;
1210
1211 printk(KERN_INFO "ide_setup: %s", s);
1212 init_ide_data ();
1213
1214 #ifdef CONFIG_BLK_DEV_IDEDOUBLER
1215 if (!strcmp(s, "ide=doubler")) {
1216 extern int ide_doubler;
1217
1218 printk(" : Enabled support for IDE doublers\n");
1219 ide_doubler = 1;
1220 return 1;
1221 }
1222 #endif /* CONFIG_BLK_DEV_IDEDOUBLER */
1223
1224 if (!strcmp(s, "ide=nodma")) {
1225 printk(" : Prevented DMA\n");
1226 noautodma = 1;
1227 goto obsolete_option;
1228 }
1229
1230 #ifdef CONFIG_IDEPCI_PCIBUS_ORDER
1231 if (!strcmp(s, "ide=reverse")) {
1232 ide_scan_direction = 1;
1233 printk(" : Enabled support for IDE inverse scan order.\n");
1234 return 1;
1235 }
1236 #endif
1237
1238 #ifdef CONFIG_BLK_DEV_IDEACPI
1239 if (!strcmp(s, "ide=noacpi")) {
1240 //printk(" : Disable IDE ACPI support.\n");
1241 ide_noacpi = 1;
1242 return 1;
1243 }
1244 if (!strcmp(s, "ide=acpigtf")) {
1245 //printk(" : Enable IDE ACPI _GTF support.\n");
1246 ide_noacpitfs = 0;
1247 return 1;
1248 }
1249 if (!strcmp(s, "ide=acpionboot")) {
1250 //printk(" : Call IDE ACPI methods on boot.\n");
1251 ide_noacpionboot = 0;
1252 return 1;
1253 }
1254 #endif /* CONFIG_BLK_DEV_IDEACPI */
1255
1256 /*
1257 * Look for drive options: "hdx="
1258 */
1259 if (s[0] == 'h' && s[1] == 'd' && s[2] >= 'a' && s[2] <= max_drive) {
1260 const char *hd_words[] = {
1261 "none", "noprobe", "nowerr", "cdrom", "nodma",
1262 "autotune", "noautotune", "-8", "-9", "-10",
1263 "noflush", "remap", "remap63", "scsi", NULL };
1264 unit = s[2] - 'a';
1265 hw = unit / MAX_DRIVES;
1266 unit = unit % MAX_DRIVES;
1267 hwif = &ide_hwifs[hw];
1268 drive = &hwif->drives[unit];
1269 if (strncmp(s + 4, "ide-", 4) == 0) {
1270 strlcpy(drive->driver_req, s + 4, sizeof(drive->driver_req));
1271 goto done;
1272 }
1273 switch (match_parm(&s[3], hd_words, vals, 3)) {
1274 case -1: /* "none" */
1275 case -2: /* "noprobe" */
1276 drive->noprobe = 1;
1277 goto done;
1278 case -3: /* "nowerr" */
1279 drive->bad_wstat = BAD_R_STAT;
1280 hwif->noprobe = 0;
1281 goto done;
1282 case -4: /* "cdrom" */
1283 drive->present = 1;
1284 drive->media = ide_cdrom;
1285 /* an ATAPI device ignores DRDY */
1286 drive->ready_stat = 0;
1287 hwif->noprobe = 0;
1288 goto done;
1289 case -5: /* nodma */
1290 drive->nodma = 1;
1291 goto done;
1292 case -6: /* "autotune" */
1293 drive->autotune = IDE_TUNE_AUTO;
1294 goto obsolete_option;
1295 case -7: /* "noautotune" */
1296 drive->autotune = IDE_TUNE_NOAUTO;
1297 goto obsolete_option;
1298 case -11: /* noflush */
1299 drive->noflush = 1;
1300 goto done;
1301 case -12: /* "remap" */
1302 drive->remap_0_to_1 = 1;
1303 goto done;
1304 case -13: /* "remap63" */
1305 drive->sect0 = 63;
1306 goto done;
1307 case -14: /* "scsi" */
1308 drive->scsi = 1;
1309 goto done;
1310 case 3: /* cyl,head,sect */
1311 drive->media = ide_disk;
1312 drive->ready_stat = READY_STAT;
1313 drive->cyl = drive->bios_cyl = vals[0];
1314 drive->head = drive->bios_head = vals[1];
1315 drive->sect = drive->bios_sect = vals[2];
1316 drive->present = 1;
1317 drive->forced_geom = 1;
1318 hwif->noprobe = 0;
1319 goto done;
1320 default:
1321 goto bad_option;
1322 }
1323 }
1324
1325 if (s[0] != 'i' || s[1] != 'd' || s[2] != 'e')
1326 goto bad_option;
1327 /*
1328 * Look for bus speed option: "idebus="
1329 */
1330 if (s[3] == 'b' && s[4] == 'u' && s[5] == 's') {
1331 if (match_parm(&s[6], NULL, vals, 1) != 1)
1332 goto bad_option;
1333 if (vals[0] >= 20 && vals[0] <= 66) {
1334 idebus_parameter = vals[0];
1335 } else
1336 printk(" -- BAD BUS SPEED! Expected value from 20 to 66");
1337 goto done;
1338 }
1339 /*
1340 * Look for interface options: "idex="
1341 */
1342 if (s[3] >= '0' && s[3] <= max_hwif) {
1343 /*
1344 * Be VERY CAREFUL changing this: note hardcoded indexes below
1345 * (-8, -9, -10) are reserved to ease the hardcoding.
1346 */
1347 static const char *ide_words[] = {
1348 "noprobe", "serialize", "minus3", "minus4",
1349 "reset", "minus6", "ata66", "minus8", "minus9",
1350 "minus10", "four", "qd65xx", "ht6560b", "cmd640_vlb",
1351 "dtc2278", "umc8672", "ali14xx", NULL };
1352
1353 hw_regs_t hwregs;
1354
1355 hw = s[3] - '0';
1356 hwif = &ide_hwifs[hw];
1357 i = match_parm(&s[4], ide_words, vals, 3);
1358
1359 /*
1360 * Cryptic check to ensure chipset not already set for hwif.
1361 * Note: we can't depend on hwif->chipset here.
1362 */
1363 if ((i >= -18 && i <= -11) || (i > 0 && i <= 3)) {
1364 /* chipset already specified */
1365 if (is_chipset_set[hw])
1366 goto bad_option;
1367 if (i > -18 && i <= -11) {
1368 /* these drivers are for "ide0=" only */
1369 if (hw != 0)
1370 goto bad_hwif;
1371 /* chipset already specified for 2nd port */
1372 if (is_chipset_set[hw+1])
1373 goto bad_option;
1374 }
1375 is_chipset_set[hw] = 1;
1376 printk("\n");
1377 }
1378
1379 switch (i) {
1380 #ifdef CONFIG_BLK_DEV_ALI14XX
1381 case -17: /* "ali14xx" */
1382 probe_ali14xx = 1;
1383 goto done;
1384 #endif
1385 #ifdef CONFIG_BLK_DEV_UMC8672
1386 case -16: /* "umc8672" */
1387 probe_umc8672 = 1;
1388 goto done;
1389 #endif
1390 #ifdef CONFIG_BLK_DEV_DTC2278
1391 case -15: /* "dtc2278" */
1392 probe_dtc2278 = 1;
1393 goto done;
1394 #endif
1395 #ifdef CONFIG_BLK_DEV_CMD640
1396 case -14: /* "cmd640_vlb" */
1397 cmd640_vlb = 1;
1398 goto done;
1399 #endif
1400 #ifdef CONFIG_BLK_DEV_HT6560B
1401 case -13: /* "ht6560b" */
1402 probe_ht6560b = 1;
1403 goto done;
1404 #endif
1405 #ifdef CONFIG_BLK_DEV_QD65XX
1406 case -12: /* "qd65xx" */
1407 probe_qd65xx = 1;
1408 goto done;
1409 #endif
1410 #ifdef CONFIG_BLK_DEV_4DRIVES
1411 case -11: /* "four" drives on one set of ports */
1412 {
1413 ide_hwif_t *mate = &ide_hwifs[hw^1];
1414 mate->drives[0].select.all ^= 0x20;
1415 mate->drives[1].select.all ^= 0x20;
1416 hwif->chipset = mate->chipset = ide_4drives;
1417 mate->irq = hwif->irq;
1418 memcpy(mate->io_ports, hwif->io_ports, sizeof(hwif->io_ports));
1419 hwif->mate = mate;
1420 mate->mate = hwif;
1421 hwif->serialized = mate->serialized = 1;
1422 goto obsolete_option;
1423 }
1424 #endif /* CONFIG_BLK_DEV_4DRIVES */
1425 case -10: /* minus10 */
1426 case -9: /* minus9 */
1427 case -8: /* minus8 */
1428 case -6:
1429 case -4:
1430 case -3:
1431 goto bad_option;
1432 case -7: /* ata66 */
1433 #ifdef CONFIG_BLK_DEV_IDEPCI
1434 /*
1435 * Use ATA_CBL_PATA40_SHORT so drive side
1436 * cable detection is also overriden.
1437 */
1438 hwif->cbl = ATA_CBL_PATA40_SHORT;
1439 goto obsolete_option;
1440 #else
1441 goto bad_hwif;
1442 #endif
1443 case -5: /* "reset" */
1444 hwif->reset = 1;
1445 goto obsolete_option;
1446 case -2: /* "serialize" */
1447 hwif->mate = &ide_hwifs[hw^1];
1448 hwif->mate->mate = hwif;
1449 hwif->serialized = hwif->mate->serialized = 1;
1450 goto obsolete_option;
1451
1452 case -1: /* "noprobe" */
1453 hwif->noprobe = 1;
1454 goto done;
1455
1456 case 1: /* base */
1457 vals[1] = vals[0] + 0x206; /* default ctl */
1458 case 2: /* base,ctl */
1459 vals[2] = 0; /* default irq = probe for it */
1460 case 3: /* base,ctl,irq */
1461 memset(&hwregs, 0, sizeof(hwregs));
1462 ide_init_hwif_ports(&hwregs, vals[0], vals[1], &hwif->irq);
1463 memcpy(hwif->io_ports, hwregs.io_ports, sizeof(hwif->io_ports));
1464 hwif->irq = vals[2];
1465 hwif->noprobe = 0;
1466 hwif->chipset = ide_forced;
1467 goto obsolete_option;
1468
1469 case 0: goto bad_option;
1470 default:
1471 printk(" -- SUPPORT NOT CONFIGURED IN THIS KERNEL\n");
1472 return 1;
1473 }
1474 }
1475 bad_option:
1476 printk(" -- BAD OPTION\n");
1477 return 1;
1478 obsolete_option:
1479 printk(" -- OBSOLETE OPTION, WILL BE REMOVED SOON!\n");
1480 return 1;
1481 bad_hwif:
1482 printk("-- NOT SUPPORTED ON ide%d", hw);
1483 done:
1484 printk("\n");
1485 return 1;
1486 }
1487
1488 EXPORT_SYMBOL(ide_lock);
1489
1490 static int ide_bus_match(struct device *dev, struct device_driver *drv)
1491 {
1492 return 1;
1493 }
1494
1495 static char *media_string(ide_drive_t *drive)
1496 {
1497 switch (drive->media) {
1498 case ide_disk:
1499 return "disk";
1500 case ide_cdrom:
1501 return "cdrom";
1502 case ide_tape:
1503 return "tape";
1504 case ide_floppy:
1505 return "floppy";
1506 case ide_optical:
1507 return "optical";
1508 default:
1509 return "UNKNOWN";
1510 }
1511 }
1512
1513 static ssize_t media_show(struct device *dev, struct device_attribute *attr, char *buf)
1514 {
1515 ide_drive_t *drive = to_ide_device(dev);
1516 return sprintf(buf, "%s\n", media_string(drive));
1517 }
1518
1519 static ssize_t drivename_show(struct device *dev, struct device_attribute *attr, char *buf)
1520 {
1521 ide_drive_t *drive = to_ide_device(dev);
1522 return sprintf(buf, "%s\n", drive->name);
1523 }
1524
1525 static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf)
1526 {
1527 ide_drive_t *drive = to_ide_device(dev);
1528 return sprintf(buf, "ide:m-%s\n", media_string(drive));
1529 }
1530
1531 static ssize_t model_show(struct device *dev, struct device_attribute *attr,
1532 char *buf)
1533 {
1534 ide_drive_t *drive = to_ide_device(dev);
1535 return sprintf(buf, "%s\n", drive->id->model);
1536 }
1537
1538 static ssize_t firmware_show(struct device *dev, struct device_attribute *attr,
1539 char *buf)
1540 {
1541 ide_drive_t *drive = to_ide_device(dev);
1542 return sprintf(buf, "%s\n", drive->id->fw_rev);
1543 }
1544
1545 static ssize_t serial_show(struct device *dev, struct device_attribute *attr,
1546 char *buf)
1547 {
1548 ide_drive_t *drive = to_ide_device(dev);
1549 return sprintf(buf, "%s\n", drive->id->serial_no);
1550 }
1551
1552 static struct device_attribute ide_dev_attrs[] = {
1553 __ATTR_RO(media),
1554 __ATTR_RO(drivename),
1555 __ATTR_RO(modalias),
1556 __ATTR_RO(model),
1557 __ATTR_RO(firmware),
1558 __ATTR(serial, 0400, serial_show, NULL),
1559 __ATTR_NULL
1560 };
1561
1562 static int ide_uevent(struct device *dev, struct kobj_uevent_env *env)
1563 {
1564 ide_drive_t *drive = to_ide_device(dev);
1565
1566 add_uevent_var(env, "MEDIA=%s", media_string(drive));
1567 add_uevent_var(env, "DRIVENAME=%s", drive->name);
1568 add_uevent_var(env, "MODALIAS=ide:m-%s", media_string(drive));
1569 return 0;
1570 }
1571
1572 static int generic_ide_probe(struct device *dev)
1573 {
1574 ide_drive_t *drive = to_ide_device(dev);
1575 ide_driver_t *drv = to_ide_driver(dev->driver);
1576
1577 return drv->probe ? drv->probe(drive) : -ENODEV;
1578 }
1579
1580 static int generic_ide_remove(struct device *dev)
1581 {
1582 ide_drive_t *drive = to_ide_device(dev);
1583 ide_driver_t *drv = to_ide_driver(dev->driver);
1584
1585 if (drv->remove)
1586 drv->remove(drive);
1587
1588 return 0;
1589 }
1590
1591 static void generic_ide_shutdown(struct device *dev)
1592 {
1593 ide_drive_t *drive = to_ide_device(dev);
1594 ide_driver_t *drv = to_ide_driver(dev->driver);
1595
1596 if (dev->driver && drv->shutdown)
1597 drv->shutdown(drive);
1598 }
1599
1600 struct bus_type ide_bus_type = {
1601 .name = "ide",
1602 .match = ide_bus_match,
1603 .uevent = ide_uevent,
1604 .probe = generic_ide_probe,
1605 .remove = generic_ide_remove,
1606 .shutdown = generic_ide_shutdown,
1607 .dev_attrs = ide_dev_attrs,
1608 .suspend = generic_ide_suspend,
1609 .resume = generic_ide_resume,
1610 };
1611
1612 EXPORT_SYMBOL_GPL(ide_bus_type);
1613
1614 /*
1615 * This is gets invoked once during initialization, to set *everything* up
1616 */
1617 static int __init ide_init(void)
1618 {
1619 int ret;
1620
1621 printk(KERN_INFO "Uniform Multi-Platform E-IDE driver " REVISION "\n");
1622 system_bus_speed = ide_system_bus_speed();
1623
1624 printk(KERN_INFO "ide: Assuming %dMHz system bus speed "
1625 "for PIO modes%s\n", system_bus_speed,
1626 idebus_parameter ? "" : "; override with idebus=xx");
1627
1628 ret = bus_register(&ide_bus_type);
1629 if (ret < 0) {
1630 printk(KERN_WARNING "IDE: bus_register error: %d\n", ret);
1631 return ret;
1632 }
1633
1634 init_ide_data();
1635
1636 proc_ide_create();
1637
1638 return 0;
1639 }
1640
1641 #ifdef MODULE
1642 static char *options = NULL;
1643 module_param(options, charp, 0);
1644 MODULE_LICENSE("GPL");
1645
1646 static void __init parse_options (char *line)
1647 {
1648 char *next = line;
1649
1650 if (line == NULL || !*line)
1651 return;
1652 while ((line = next) != NULL) {
1653 if ((next = strchr(line,' ')) != NULL)
1654 *next++ = 0;
1655 if (!ide_setup(line))
1656 printk (KERN_INFO "Unknown option '%s'\n", line);
1657 }
1658 }
1659
1660 int __init init_module (void)
1661 {
1662 parse_options(options);
1663 return ide_init();
1664 }
1665
1666 void __exit cleanup_module (void)
1667 {
1668 int index;
1669
1670 for (index = 0; index < MAX_HWIFS; ++index)
1671 ide_unregister(index, 0, 0);
1672
1673 proc_ide_destroy();
1674
1675 bus_unregister(&ide_bus_type);
1676 }
1677
1678 #else /* !MODULE */
1679
1680 __setup("", ide_setup);
1681
1682 module_init(ide_init);
1683
1684 #endif /* MODULE */
WRT350N Kernel Patches