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ide: update/add my Copyrights
[linux-2.6.git] / drivers / ide / ide.c
blob725187bc60031db90b0c6732f795d9be86214cb0
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 if (!system_bus_speed) {
244 if (idebus_parameter) {
245 /* user supplied value */
246 system_bus_speed = idebus_parameter;
247 } else if (pci_dev_present(pci_default)) {
248 /* safe default value for PCI */
249 system_bus_speed = 33;
250 } else {
251 /* safe default value for VESA and PCI */
252 system_bus_speed = 50;
253 }
254 printk(KERN_INFO "ide: Assuming %dMHz system bus speed "
255 "for PIO modes%s\n", system_bus_speed,
256 idebus_parameter ? "" : "; override with idebus=xx");
257 }
258 return system_bus_speed;
259 }
260
261 ide_hwif_t * ide_find_port(unsigned long base)
262 {
263 ide_hwif_t *hwif;
264 int i;
265
266 for (i = 0; i < MAX_HWIFS; i++) {
267 hwif = &ide_hwifs[i];
268 if (hwif->io_ports[IDE_DATA_OFFSET] == base)
269 goto found;
270 }
271
272 for (i = 0; i < MAX_HWIFS; i++) {
273 hwif = &ide_hwifs[i];
274 if (hwif->io_ports[IDE_DATA_OFFSET] == 0)
275 goto found;
276 }
277
278 hwif = NULL;
279 found:
280 return hwif;
281 }
282
283 EXPORT_SYMBOL_GPL(ide_find_port);
284
285 static struct resource* hwif_request_region(ide_hwif_t *hwif,
286 unsigned long addr, int num)
287 {
288 struct resource *res = request_region(addr, num, hwif->name);
289
290 if (!res)
291 printk(KERN_ERR "%s: I/O resource 0x%lX-0x%lX not free.\n",
292 hwif->name, addr, addr+num-1);
293 return res;
294 }
295
296 /**
297 * ide_hwif_request_regions - request resources for IDE
298 * @hwif: interface to use
299 *
300 * Requests all the needed resources for an interface.
301 * Right now core IDE code does this work which is deeply wrong.
302 * MMIO leaves it to the controller driver,
303 * PIO will migrate this way over time.
304 */
305
306 int ide_hwif_request_regions(ide_hwif_t *hwif)
307 {
308 unsigned long addr;
309 unsigned int i;
310
311 if (hwif->mmio)
312 return 0;
313 addr = hwif->io_ports[IDE_CONTROL_OFFSET];
314 if (addr && !hwif_request_region(hwif, addr, 1))
315 goto control_region_busy;
316 hwif->straight8 = 0;
317 addr = hwif->io_ports[IDE_DATA_OFFSET];
318 if ((addr | 7) == hwif->io_ports[IDE_STATUS_OFFSET]) {
319 if (!hwif_request_region(hwif, addr, 8))
320 goto data_region_busy;
321 hwif->straight8 = 1;
322 return 0;
323 }
324 for (i = IDE_DATA_OFFSET; i <= IDE_STATUS_OFFSET; i++) {
325 addr = hwif->io_ports[i];
326 if (!hwif_request_region(hwif, addr, 1)) {
327 while (--i)
328 release_region(addr, 1);
329 goto data_region_busy;
330 }
331 }
332 return 0;
333
334 data_region_busy:
335 addr = hwif->io_ports[IDE_CONTROL_OFFSET];
336 if (addr)
337 release_region(addr, 1);
338 control_region_busy:
339 /* If any errors are return, we drop the hwif interface. */
340 return -EBUSY;
341 }
342
343 /**
344 * ide_hwif_release_regions - free IDE resources
345 *
346 * Note that we only release the standard ports,
347 * and do not even try to handle any extra ports
348 * allocated for weird IDE interface chipsets.
349 *
350 * Note also that we don't yet handle mmio resources here. More
351 * importantly our caller should be doing this so we need to
352 * restructure this as a helper function for drivers.
353 */
354
355 void ide_hwif_release_regions(ide_hwif_t *hwif)
356 {
357 u32 i = 0;
358
359 if (hwif->mmio)
360 return;
361 if (hwif->io_ports[IDE_CONTROL_OFFSET])
362 release_region(hwif->io_ports[IDE_CONTROL_OFFSET], 1);
363 if (hwif->straight8) {
364 release_region(hwif->io_ports[IDE_DATA_OFFSET], 8);
365 return;
366 }
367 for (i = IDE_DATA_OFFSET; i <= IDE_STATUS_OFFSET; i++)
368 if (hwif->io_ports[i])
369 release_region(hwif->io_ports[i], 1);
370 }
371
372 /**
373 * ide_hwif_restore - restore hwif to template
374 * @hwif: hwif to update
375 * @tmp_hwif: template
376 *
377 * Restore hwif to a previous state by copying most settings
378 * from the template.
379 */
380
381 static void ide_hwif_restore(ide_hwif_t *hwif, ide_hwif_t *tmp_hwif)
382 {
383 hwif->hwgroup = tmp_hwif->hwgroup;
384
385 hwif->gendev.parent = tmp_hwif->gendev.parent;
386
387 hwif->proc = tmp_hwif->proc;
388
389 hwif->major = tmp_hwif->major;
390 hwif->straight8 = tmp_hwif->straight8;
391 hwif->bus_state = tmp_hwif->bus_state;
392
393 hwif->host_flags = tmp_hwif->host_flags;
394
395 hwif->pio_mask = tmp_hwif->pio_mask;
396
397 hwif->ultra_mask = tmp_hwif->ultra_mask;
398 hwif->mwdma_mask = tmp_hwif->mwdma_mask;
399 hwif->swdma_mask = tmp_hwif->swdma_mask;
400
401 hwif->cbl = tmp_hwif->cbl;
402
403 hwif->chipset = tmp_hwif->chipset;
404 hwif->hold = tmp_hwif->hold;
405
406 hwif->dev = tmp_hwif->dev;
407
408 #ifdef CONFIG_BLK_DEV_IDEPCI
409 hwif->cds = tmp_hwif->cds;
410 #endif
411
412 hwif->set_pio_mode = tmp_hwif->set_pio_mode;
413 hwif->set_dma_mode = tmp_hwif->set_dma_mode;
414 hwif->mdma_filter = tmp_hwif->mdma_filter;
415 hwif->udma_filter = tmp_hwif->udma_filter;
416 hwif->selectproc = tmp_hwif->selectproc;
417 hwif->reset_poll = tmp_hwif->reset_poll;
418 hwif->pre_reset = tmp_hwif->pre_reset;
419 hwif->resetproc = tmp_hwif->resetproc;
420 hwif->maskproc = tmp_hwif->maskproc;
421 hwif->quirkproc = tmp_hwif->quirkproc;
422 hwif->busproc = tmp_hwif->busproc;
423
424 hwif->ata_input_data = tmp_hwif->ata_input_data;
425 hwif->ata_output_data = tmp_hwif->ata_output_data;
426 hwif->atapi_input_bytes = tmp_hwif->atapi_input_bytes;
427 hwif->atapi_output_bytes = tmp_hwif->atapi_output_bytes;
428
429 hwif->dma_host_set = tmp_hwif->dma_host_set;
430 hwif->dma_setup = tmp_hwif->dma_setup;
431 hwif->dma_exec_cmd = tmp_hwif->dma_exec_cmd;
432 hwif->dma_start = tmp_hwif->dma_start;
433 hwif->ide_dma_end = tmp_hwif->ide_dma_end;
434 hwif->ide_dma_test_irq = tmp_hwif->ide_dma_test_irq;
435 hwif->ide_dma_clear_irq = tmp_hwif->ide_dma_clear_irq;
436 hwif->dma_lost_irq = tmp_hwif->dma_lost_irq;
437 hwif->dma_timeout = tmp_hwif->dma_timeout;
438
439 hwif->OUTB = tmp_hwif->OUTB;
440 hwif->OUTBSYNC = tmp_hwif->OUTBSYNC;
441 hwif->OUTW = tmp_hwif->OUTW;
442 hwif->OUTSW = tmp_hwif->OUTSW;
443 hwif->OUTSL = tmp_hwif->OUTSL;
444
445 hwif->INB = tmp_hwif->INB;
446 hwif->INW = tmp_hwif->INW;
447 hwif->INSW = tmp_hwif->INSW;
448 hwif->INSL = tmp_hwif->INSL;
449
450 hwif->sg_max_nents = tmp_hwif->sg_max_nents;
451
452 hwif->mmio = tmp_hwif->mmio;
453 hwif->rqsize = tmp_hwif->rqsize;
454
455 #ifndef CONFIG_BLK_DEV_IDECS
456 hwif->irq = tmp_hwif->irq;
457 #endif
458
459 hwif->dma_base = tmp_hwif->dma_base;
460 hwif->dma_command = tmp_hwif->dma_command;
461 hwif->dma_vendor1 = tmp_hwif->dma_vendor1;
462 hwif->dma_status = tmp_hwif->dma_status;
463 hwif->dma_vendor3 = tmp_hwif->dma_vendor3;
464 hwif->dma_prdtable = tmp_hwif->dma_prdtable;
465
466 hwif->config_data = tmp_hwif->config_data;
467 hwif->select_data = tmp_hwif->select_data;
468 hwif->extra_base = tmp_hwif->extra_base;
469 hwif->extra_ports = tmp_hwif->extra_ports;
470
471 hwif->hwif_data = tmp_hwif->hwif_data;
472 }
473
474 /**
475 * ide_unregister - free an IDE interface
476 * @index: index of interface (will change soon to a pointer)
477 *
478 * Perform the final unregister of an IDE interface. At the moment
479 * we don't refcount interfaces so this will also get split up.
480 *
481 * Locking:
482 * The caller must not hold the IDE locks
483 * The drive present/vanishing is not yet properly locked
484 * Take care with the callbacks. These have been split to avoid
485 * deadlocking the IDE layer. The shutdown callback is called
486 * before we take the lock and free resources. It is up to the
487 * caller to be sure there is no pending I/O here, and that
488 * the interface will not be reopened (present/vanishing locking
489 * isn't yet done BTW). After we commit to the final kill we
490 * call the cleanup callback with the ide locks held.
491 *
492 * Unregister restores the hwif structures to the default state.
493 * This is raving bonkers.
494 */
495
496 void ide_unregister(unsigned int index)
497 {
498 ide_drive_t *drive;
499 ide_hwif_t *hwif, *g;
500 static ide_hwif_t tmp_hwif; /* protected by ide_cfg_mtx */
501 ide_hwgroup_t *hwgroup;
502 int irq_count = 0, unit;
503
504 BUG_ON(index >= MAX_HWIFS);
505
506 BUG_ON(in_interrupt());
507 BUG_ON(irqs_disabled());
508 mutex_lock(&ide_cfg_mtx);
509 spin_lock_irq(&ide_lock);
510 hwif = &ide_hwifs[index];
511 if (!hwif->present)
512 goto abort;
513 for (unit = 0; unit < MAX_DRIVES; ++unit) {
514 drive = &hwif->drives[unit];
515 if (!drive->present)
516 continue;
517 spin_unlock_irq(&ide_lock);
518 device_unregister(&drive->gendev);
519 wait_for_completion(&drive->gendev_rel_comp);
520 spin_lock_irq(&ide_lock);
521 }
522 hwif->present = 0;
523
524 spin_unlock_irq(&ide_lock);
525
526 ide_proc_unregister_port(hwif);
527
528 hwgroup = hwif->hwgroup;
529 /*
530 * free the irq if we were the only hwif using it
531 */
532 g = hwgroup->hwif;
533 do {
534 if (g->irq == hwif->irq)
535 ++irq_count;
536 g = g->next;
537 } while (g != hwgroup->hwif);
538 if (irq_count == 1)
539 free_irq(hwif->irq, hwgroup);
540
541 spin_lock_irq(&ide_lock);
542 /*
543 * Note that we only release the standard ports,
544 * and do not even try to handle any extra ports
545 * allocated for weird IDE interface chipsets.
546 */
547 ide_hwif_release_regions(hwif);
548
549 /*
550 * Remove us from the hwgroup, and free
551 * the hwgroup if we were the only member
552 */
553 if (hwif->next == hwif) {
554 BUG_ON(hwgroup->hwif != hwif);
555 kfree(hwgroup);
556 } else {
557 /* There is another interface in hwgroup.
558 * Unlink us, and set hwgroup->drive and ->hwif to
559 * something sane.
560 */
561 g = hwgroup->hwif;
562 while (g->next != hwif)
563 g = g->next;
564 g->next = hwif->next;
565 if (hwgroup->hwif == hwif) {
566 /* Chose a random hwif for hwgroup->hwif.
567 * It's guaranteed that there are no drives
568 * left in the hwgroup.
569 */
570 BUG_ON(hwgroup->drive != NULL);
571 hwgroup->hwif = g;
572 }
573 BUG_ON(hwgroup->hwif == hwif);
574 }
575
576 /* More messed up locking ... */
577 spin_unlock_irq(&ide_lock);
578 device_unregister(&hwif->gendev);
579 wait_for_completion(&hwif->gendev_rel_comp);
580
581 /*
582 * Remove us from the kernel's knowledge
583 */
584 blk_unregister_region(MKDEV(hwif->major, 0), MAX_DRIVES<<PARTN_BITS);
585 kfree(hwif->sg_table);
586 unregister_blkdev(hwif->major, hwif->name);
587 spin_lock_irq(&ide_lock);
588
589 if (hwif->dma_base) {
590 (void) ide_release_dma(hwif);
591
592 hwif->dma_base = 0;
593 hwif->dma_command = 0;
594 hwif->dma_vendor1 = 0;
595 hwif->dma_status = 0;
596 hwif->dma_vendor3 = 0;
597 hwif->dma_prdtable = 0;
598
599 hwif->extra_base = 0;
600 hwif->extra_ports = 0;
601 }
602
603 /* copy original settings */
604 tmp_hwif = *hwif;
605
606 /* restore hwif data to pristine status */
607 ide_init_port_data(hwif, index);
608 init_hwif_default(hwif, index);
609
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
620 /**
621 * ide_setup_ports - set up IDE interface ports
622 * @hw: register descriptions
623 * @base: base register
624 * @offsets: table of register offsets
625 * @ctrl: control register
626 * @ack_irq: IRQ ack
627 * @irq: interrupt lie
628 *
629 * Setup hw_regs_t structure described by parameters. You
630 * may set up the hw structure yourself OR use this routine to
631 * do it for you. This is basically a helper
632 *
633 */
634
635 void ide_setup_ports ( hw_regs_t *hw,
636 unsigned long base, int *offsets,
637 unsigned long ctrl, unsigned long intr,
638 ide_ack_intr_t *ack_intr,
639 /*
640 * ide_io_ops_t *iops,
641 */
642 int irq)
643 {
644 int i;
645
646 memset(hw, 0, sizeof(hw_regs_t));
647 for (i = 0; i < IDE_NR_PORTS; i++) {
648 if (offsets[i] == -1) {
649 switch(i) {
650 case IDE_CONTROL_OFFSET:
651 hw->io_ports[i] = ctrl;
652 break;
653 #if defined(CONFIG_AMIGA) || defined(CONFIG_MAC)
654 case IDE_IRQ_OFFSET:
655 hw->io_ports[i] = intr;
656 break;
657 #endif /* (CONFIG_AMIGA) || (CONFIG_MAC) */
658 default:
659 hw->io_ports[i] = 0;
660 break;
661 }
662 } else {
663 hw->io_ports[i] = base + offsets[i];
664 }
665 }
666 hw->irq = irq;
667 hw->ack_intr = ack_intr;
668 /*
669 * hw->iops = iops;
670 */
671 }
672
673 void ide_init_port_hw(ide_hwif_t *hwif, hw_regs_t *hw)
674 {
675 memcpy(hwif->io_ports, hw->io_ports, sizeof(hwif->io_ports));
676 hwif->irq = hw->irq;
677 hwif->noprobe = 0;
678 hwif->chipset = hw->chipset;
679 hwif->gendev.parent = hw->dev;
680 hwif->ack_intr = hw->ack_intr;
681 }
682 EXPORT_SYMBOL_GPL(ide_init_port_hw);
683
684 /**
685 * ide_register_hw - register IDE interface
686 * @hw: hardware registers
687 * @quirkproc: quirkproc function
688 * @hwifp: pointer to returned hwif
689 *
690 * Register an IDE interface, specifying exactly the registers etc.
691 *
692 * Returns -1 on error.
693 */
694
695 int ide_register_hw(hw_regs_t *hw, void (*quirkproc)(ide_drive_t *),
696 ide_hwif_t **hwifp)
697 {
698 int index, retry = 1;
699 ide_hwif_t *hwif;
700 u8 idx[4] = { 0xff, 0xff, 0xff, 0xff };
701
702 do {
703 for (index = 0; index < MAX_HWIFS; ++index) {
704 hwif = &ide_hwifs[index];
705 if (hwif->io_ports[IDE_DATA_OFFSET] == hw->io_ports[IDE_DATA_OFFSET])
706 goto found;
707 }
708 for (index = 0; index < MAX_HWIFS; ++index) {
709 hwif = &ide_hwifs[index];
710 if (hwif->hold)
711 continue;
712 if (!hwif->present && hwif->mate == NULL)
713 goto found;
714 }
715 for (index = 0; index < MAX_HWIFS; index++)
716 ide_unregister(index);
717 } while (retry--);
718 return -1;
719 found:
720 if (hwif->present)
721 ide_unregister(index);
722 else if (!hwif->hold) {
723 ide_init_port_data(hwif, index);
724 init_hwif_default(hwif, index);
725 }
726 if (hwif->present)
727 return -1;
728
729 ide_init_port_hw(hwif, hw);
730 hwif->quirkproc = quirkproc;
731
732 idx[0] = index;
733
734 ide_device_add(idx);
735
736 if (hwifp)
737 *hwifp = hwif;
738
739 return hwif->present ? index : -1;
740 }
741
742 EXPORT_SYMBOL(ide_register_hw);
743
744 /*
745 * Locks for IDE setting functionality
746 */
747
748 DEFINE_MUTEX(ide_setting_mtx);
749
750 EXPORT_SYMBOL_GPL(ide_setting_mtx);
751
752 /**
753 * ide_spin_wait_hwgroup - wait for group
754 * @drive: drive in the group
755 *
756 * Wait for an IDE device group to go non busy and then return
757 * holding the ide_lock which guards the hwgroup->busy status
758 * and right to use it.
759 */
760
761 int ide_spin_wait_hwgroup (ide_drive_t *drive)
762 {
763 ide_hwgroup_t *hwgroup = HWGROUP(drive);
764 unsigned long timeout = jiffies + (3 * HZ);
765
766 spin_lock_irq(&ide_lock);
767
768 while (hwgroup->busy) {
769 unsigned long lflags;
770 spin_unlock_irq(&ide_lock);
771 local_irq_set(lflags);
772 if (time_after(jiffies, timeout)) {
773 local_irq_restore(lflags);
774 printk(KERN_ERR "%s: channel busy\n", drive->name);
775 return -EBUSY;
776 }
777 local_irq_restore(lflags);
778 spin_lock_irq(&ide_lock);
779 }
780 return 0;
781 }
782
783 EXPORT_SYMBOL(ide_spin_wait_hwgroup);
784
785 int set_io_32bit(ide_drive_t *drive, int arg)
786 {
787 if (drive->no_io_32bit)
788 return -EPERM;
789
790 if (arg < 0 || arg > 1 + (SUPPORT_VLB_SYNC << 1))
791 return -EINVAL;
792
793 if (ide_spin_wait_hwgroup(drive))
794 return -EBUSY;
795
796 drive->io_32bit = arg;
797 #ifdef CONFIG_BLK_DEV_DTC2278
798 if (HWIF(drive)->chipset == ide_dtc2278)
799 HWIF(drive)->drives[!drive->select.b.unit].io_32bit = arg;
800 #endif /* CONFIG_BLK_DEV_DTC2278 */
801
802 spin_unlock_irq(&ide_lock);
803
804 return 0;
805 }
806
807 static int set_ksettings(ide_drive_t *drive, int arg)
808 {
809 if (arg < 0 || arg > 1)
810 return -EINVAL;
811
812 if (ide_spin_wait_hwgroup(drive))
813 return -EBUSY;
814 drive->keep_settings = arg;
815 spin_unlock_irq(&ide_lock);
816
817 return 0;
818 }
819
820 int set_using_dma(ide_drive_t *drive, int arg)
821 {
822 #ifdef CONFIG_BLK_DEV_IDEDMA
823 ide_hwif_t *hwif = drive->hwif;
824 int err = -EPERM;
825
826 if (arg < 0 || arg > 1)
827 return -EINVAL;
828
829 if (!drive->id || !(drive->id->capability & 1))
830 goto out;
831
832 if (hwif->dma_host_set == NULL)
833 goto out;
834
835 err = -EBUSY;
836 if (ide_spin_wait_hwgroup(drive))
837 goto out;
838 /*
839 * set ->busy flag, unlock and let it ride
840 */
841 hwif->hwgroup->busy = 1;
842 spin_unlock_irq(&ide_lock);
843
844 err = 0;
845
846 if (arg) {
847 if (ide_set_dma(drive))
848 err = -EIO;
849 } else
850 ide_dma_off(drive);
851
852 /*
853 * lock, clear ->busy flag and unlock before leaving
854 */
855 spin_lock_irq(&ide_lock);
856 hwif->hwgroup->busy = 0;
857 spin_unlock_irq(&ide_lock);
858 out:
859 return err;
860 #else
861 if (arg < 0 || arg > 1)
862 return -EINVAL;
863
864 return -EPERM;
865 #endif
866 }
867
868 int set_pio_mode(ide_drive_t *drive, int arg)
869 {
870 struct request rq;
871
872 if (arg < 0 || arg > 255)
873 return -EINVAL;
874
875 if (drive->hwif->set_pio_mode == NULL)
876 return -ENOSYS;
877
878 if (drive->special.b.set_tune)
879 return -EBUSY;
880
881 ide_init_drive_cmd(&rq);
882 rq.cmd_type = REQ_TYPE_ATA_TASKFILE;
883
884 drive->tune_req = (u8) arg;
885 drive->special.b.set_tune = 1;
886 (void) ide_do_drive_cmd(drive, &rq, ide_wait);
887 return 0;
888 }
889
890 static int set_unmaskirq(ide_drive_t *drive, int arg)
891 {
892 if (drive->no_unmask)
893 return -EPERM;
894
895 if (arg < 0 || arg > 1)
896 return -EINVAL;
897
898 if (ide_spin_wait_hwgroup(drive))
899 return -EBUSY;
900 drive->unmask = arg;
901 spin_unlock_irq(&ide_lock);
902
903 return 0;
904 }
905
906 /**
907 * system_bus_clock - clock guess
908 *
909 * External version of the bus clock guess used by very old IDE drivers
910 * for things like VLB timings. Should not be used.
911 */
912
913 int system_bus_clock (void)
914 {
915 return((int) ((!system_bus_speed) ? ide_system_bus_speed() : system_bus_speed ));
916 }
917
918 EXPORT_SYMBOL(system_bus_clock);
919
920 static int generic_ide_suspend(struct device *dev, pm_message_t mesg)
921 {
922 ide_drive_t *drive = dev->driver_data;
923 ide_hwif_t *hwif = HWIF(drive);
924 struct request rq;
925 struct request_pm_state rqpm;
926 ide_task_t args;
927 int ret;
928
929 /* Call ACPI _GTM only once */
930 if (!(drive->dn % 2))
931 ide_acpi_get_timing(hwif);
932
933 memset(&rq, 0, sizeof(rq));
934 memset(&rqpm, 0, sizeof(rqpm));
935 memset(&args, 0, sizeof(args));
936 rq.cmd_type = REQ_TYPE_PM_SUSPEND;
937 rq.special = &args;
938 rq.data = &rqpm;
939 rqpm.pm_step = ide_pm_state_start_suspend;
940 if (mesg.event == PM_EVENT_PRETHAW)
941 mesg.event = PM_EVENT_FREEZE;
942 rqpm.pm_state = mesg.event;
943
944 ret = ide_do_drive_cmd(drive, &rq, ide_wait);
945 /* only call ACPI _PS3 after both drivers are suspended */
946 if (!ret && (((drive->dn % 2) && hwif->drives[0].present
947 && hwif->drives[1].present)
948 || !hwif->drives[0].present
949 || !hwif->drives[1].present))
950 ide_acpi_set_state(hwif, 0);
951 return ret;
952 }
953
954 static int generic_ide_resume(struct device *dev)
955 {
956 ide_drive_t *drive = dev->driver_data;
957 ide_hwif_t *hwif = HWIF(drive);
958 struct request rq;
959 struct request_pm_state rqpm;
960 ide_task_t args;
961 int err;
962
963 /* Call ACPI _STM only once */
964 if (!(drive->dn % 2)) {
965 ide_acpi_set_state(hwif, 1);
966 ide_acpi_push_timing(hwif);
967 }
968
969 ide_acpi_exec_tfs(drive);
970
971 memset(&rq, 0, sizeof(rq));
972 memset(&rqpm, 0, sizeof(rqpm));
973 memset(&args, 0, sizeof(args));
974 rq.cmd_type = REQ_TYPE_PM_RESUME;
975 rq.special = &args;
976 rq.data = &rqpm;
977 rqpm.pm_step = ide_pm_state_start_resume;
978 rqpm.pm_state = PM_EVENT_ON;
979
980 err = ide_do_drive_cmd(drive, &rq, ide_head_wait);
981
982 if (err == 0 && dev->driver) {
983 ide_driver_t *drv = to_ide_driver(dev->driver);
984
985 if (drv->resume)
986 drv->resume(drive);
987 }
988
989 return err;
990 }
991
992 int generic_ide_ioctl(ide_drive_t *drive, struct file *file, struct block_device *bdev,
993 unsigned int cmd, unsigned long arg)
994 {
995 unsigned long flags;
996 ide_driver_t *drv;
997 void __user *p = (void __user *)arg;
998 int err = 0, (*setfunc)(ide_drive_t *, int);
999 u8 *val;
1000
1001 switch (cmd) {
1002 case HDIO_GET_32BIT: val = &drive->io_32bit; goto read_val;
1003 case HDIO_GET_KEEPSETTINGS: val = &drive->keep_settings; goto read_val;
1004 case HDIO_GET_UNMASKINTR: val = &drive->unmask; goto read_val;
1005 case HDIO_GET_DMA: val = &drive->using_dma; goto read_val;
1006 case HDIO_SET_32BIT: setfunc = set_io_32bit; goto set_val;
1007 case HDIO_SET_KEEPSETTINGS: setfunc = set_ksettings; goto set_val;
1008 case HDIO_SET_PIO_MODE: setfunc = set_pio_mode; goto set_val;
1009 case HDIO_SET_UNMASKINTR: setfunc = set_unmaskirq; goto set_val;
1010 case HDIO_SET_DMA: setfunc = set_using_dma; goto set_val;
1011 }
1012
1013 switch (cmd) {
1014 case HDIO_OBSOLETE_IDENTITY:
1015 case HDIO_GET_IDENTITY:
1016 if (bdev != bdev->bd_contains)
1017 return -EINVAL;
1018 if (drive->id_read == 0)
1019 return -ENOMSG;
1020 if (copy_to_user(p, drive->id, (cmd == HDIO_GET_IDENTITY) ? sizeof(*drive->id) : 142))
1021 return -EFAULT;
1022 return 0;
1023
1024 case HDIO_GET_NICE:
1025 return put_user(drive->dsc_overlap << IDE_NICE_DSC_OVERLAP |
1026 drive->atapi_overlap << IDE_NICE_ATAPI_OVERLAP |
1027 drive->nice0 << IDE_NICE_0 |
1028 drive->nice1 << IDE_NICE_1 |
1029 drive->nice2 << IDE_NICE_2,
1030 (long __user *) arg);
1031
1032 #ifdef CONFIG_IDE_TASK_IOCTL
1033 case HDIO_DRIVE_TASKFILE:
1034 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
1035 return -EACCES;
1036 switch(drive->media) {
1037 case ide_disk:
1038 return ide_taskfile_ioctl(drive, cmd, arg);
1039 default:
1040 return -ENOMSG;
1041 }
1042 #endif /* CONFIG_IDE_TASK_IOCTL */
1043
1044 case HDIO_DRIVE_CMD:
1045 if (!capable(CAP_SYS_RAWIO))
1046 return -EACCES;
1047 return ide_cmd_ioctl(drive, cmd, arg);
1048
1049 case HDIO_DRIVE_TASK:
1050 if (!capable(CAP_SYS_RAWIO))
1051 return -EACCES;
1052 return ide_task_ioctl(drive, cmd, arg);
1053
1054 case HDIO_SCAN_HWIF:
1055 {
1056 hw_regs_t hw;
1057 int args[3];
1058 if (!capable(CAP_SYS_RAWIO)) return -EACCES;
1059 if (copy_from_user(args, p, 3 * sizeof(int)))
1060 return -EFAULT;
1061 memset(&hw, 0, sizeof(hw));
1062 ide_init_hwif_ports(&hw, (unsigned long) args[0],
1063 (unsigned long) args[1], NULL);
1064 hw.irq = args[2];
1065 if (ide_register_hw(&hw, NULL, NULL) == -1)
1066 return -EIO;
1067 return 0;
1068 }
1069 case HDIO_UNREGISTER_HWIF:
1070 if (!capable(CAP_SYS_RAWIO)) return -EACCES;
1071 /* (arg > MAX_HWIFS) checked in function */
1072 ide_unregister(arg);
1073 return 0;
1074 case HDIO_SET_NICE:
1075 if (!capable(CAP_SYS_ADMIN)) return -EACCES;
1076 if (arg != (arg & ((1 << IDE_NICE_DSC_OVERLAP) | (1 << IDE_NICE_1))))
1077 return -EPERM;
1078 drive->dsc_overlap = (arg >> IDE_NICE_DSC_OVERLAP) & 1;
1079 drv = *(ide_driver_t **)bdev->bd_disk->private_data;
1080 if (drive->dsc_overlap && !drv->supports_dsc_overlap) {
1081 drive->dsc_overlap = 0;
1082 return -EPERM;
1083 }
1084 drive->nice1 = (arg >> IDE_NICE_1) & 1;
1085 return 0;
1086 case HDIO_DRIVE_RESET:
1087 {
1088 unsigned long flags;
1089 if (!capable(CAP_SYS_ADMIN)) return -EACCES;
1090
1091 /*
1092 * Abort the current command on the
1093 * group if there is one, taking
1094 * care not to allow anything else
1095 * to be queued and to die on the
1096 * spot if we miss one somehow
1097 */
1098
1099 spin_lock_irqsave(&ide_lock, flags);
1100
1101 if (HWGROUP(drive)->resetting) {
1102 spin_unlock_irqrestore(&ide_lock, flags);
1103 return -EBUSY;
1104 }
1105
1106 ide_abort(drive, "drive reset");
1107
1108 BUG_ON(HWGROUP(drive)->handler);
1109
1110 /* Ensure nothing gets queued after we
1111 drop the lock. Reset will clear the busy */
1112
1113 HWGROUP(drive)->busy = 1;
1114 spin_unlock_irqrestore(&ide_lock, flags);
1115 (void) ide_do_reset(drive);
1116
1117 return 0;
1118 }
1119
1120 case HDIO_GET_BUSSTATE:
1121 if (!capable(CAP_SYS_ADMIN))
1122 return -EACCES;
1123 if (put_user(HWIF(drive)->bus_state, (long __user *)arg))
1124 return -EFAULT;
1125 return 0;
1126
1127 case HDIO_SET_BUSSTATE:
1128 if (!capable(CAP_SYS_ADMIN))
1129 return -EACCES;
1130 if (HWIF(drive)->busproc)
1131 return HWIF(drive)->busproc(drive, (int)arg);
1132 return -EOPNOTSUPP;
1133 default:
1134 return -EINVAL;
1135 }
1136
1137 read_val:
1138 mutex_lock(&ide_setting_mtx);
1139 spin_lock_irqsave(&ide_lock, flags);
1140 err = *val;
1141 spin_unlock_irqrestore(&ide_lock, flags);
1142 mutex_unlock(&ide_setting_mtx);
1143 return err >= 0 ? put_user(err, (long __user *)arg) : err;
1144
1145 set_val:
1146 if (bdev != bdev->bd_contains)
1147 err = -EINVAL;
1148 else {
1149 if (!capable(CAP_SYS_ADMIN))
1150 err = -EACCES;
1151 else {
1152 mutex_lock(&ide_setting_mtx);
1153 err = setfunc(drive, arg);
1154 mutex_unlock(&ide_setting_mtx);
1155 }
1156 }
1157 return err;
1158 }
1159
1160 EXPORT_SYMBOL(generic_ide_ioctl);
1161
1162 /*
1163 * stridx() returns the offset of c within s,
1164 * or -1 if c is '\0' or not found within s.
1165 */
1166 static int __init stridx (const char *s, char c)
1167 {
1168 char *i = strchr(s, c);
1169 return (i && c) ? i - s : -1;
1170 }
1171
1172 /*
1173 * match_parm() does parsing for ide_setup():
1174 *
1175 * 1. the first char of s must be '='.
1176 * 2. if the remainder matches one of the supplied keywords,
1177 * the index (1 based) of the keyword is negated and returned.
1178 * 3. if the remainder is a series of no more than max_vals numbers
1179 * separated by commas, the numbers are saved in vals[] and a
1180 * count of how many were saved is returned. Base10 is assumed,
1181 * and base16 is allowed when prefixed with "0x".
1182 * 4. otherwise, zero is returned.
1183 */
1184 static int __init match_parm (char *s, const char *keywords[], int vals[], int max_vals)
1185 {
1186 static const char *decimal = "0123456789";
1187 static const char *hex = "0123456789abcdef";
1188 int i, n;
1189
1190 if (*s++ == '=') {
1191 /*
1192 * Try matching against the supplied keywords,
1193 * and return -(index+1) if we match one
1194 */
1195 if (keywords != NULL) {
1196 for (i = 0; *keywords != NULL; ++i) {
1197 if (!strcmp(s, *keywords++))
1198 return -(i+1);
1199 }
1200 }
1201 /*
1202 * Look for a series of no more than "max_vals"
1203 * numeric values separated by commas, in base10,
1204 * or base16 when prefixed with "0x".
1205 * Return a count of how many were found.
1206 */
1207 for (n = 0; (i = stridx(decimal, *s)) >= 0;) {
1208 vals[n] = i;
1209 while ((i = stridx(decimal, *++s)) >= 0)
1210 vals[n] = (vals[n] * 10) + i;
1211 if (*s == 'x' && !vals[n]) {
1212 while ((i = stridx(hex, *++s)) >= 0)
1213 vals[n] = (vals[n] * 0x10) + i;
1214 }
1215 if (++n == max_vals)
1216 break;
1217 if (*s == ',' || *s == ';')
1218 ++s;
1219 }
1220 if (!*s)
1221 return n;
1222 }
1223 return 0; /* zero = nothing matched */
1224 }
1225
1226 extern int probe_ali14xx;
1227 extern int probe_umc8672;
1228 extern int probe_dtc2278;
1229 extern int probe_ht6560b;
1230 extern int probe_qd65xx;
1231 extern int cmd640_vlb;
1232
1233 static int __initdata is_chipset_set[MAX_HWIFS];
1234
1235 /*
1236 * ide_setup() gets called VERY EARLY during initialization,
1237 * to handle kernel "command line" strings beginning with "hdx=" or "ide".
1238 *
1239 * Remember to update Documentation/ide.txt if you change something here.
1240 */
1241 static int __init ide_setup(char *s)
1242 {
1243 int i, vals[3];
1244 ide_hwif_t *hwif;
1245 ide_drive_t *drive;
1246 unsigned int hw, unit;
1247 const char max_drive = 'a' + ((MAX_HWIFS * MAX_DRIVES) - 1);
1248 const char max_hwif = '0' + (MAX_HWIFS - 1);
1249
1250
1251 if (strncmp(s,"hd",2) == 0 && s[2] == '=') /* hd= is for hd.c */
1252 return 0; /* driver and not us */
1253
1254 if (strncmp(s,"ide",3) && strncmp(s,"idebus",6) && strncmp(s,"hd",2))
1255 return 0;
1256
1257 printk(KERN_INFO "ide_setup: %s", s);
1258 init_ide_data ();
1259
1260 #ifdef CONFIG_BLK_DEV_IDEDOUBLER
1261 if (!strcmp(s, "ide=doubler")) {
1262 extern int ide_doubler;
1263
1264 printk(" : Enabled support for IDE doublers\n");
1265 ide_doubler = 1;
1266 return 1;
1267 }
1268 #endif /* CONFIG_BLK_DEV_IDEDOUBLER */
1269
1270 if (!strcmp(s, "ide=nodma")) {
1271 printk(" : Prevented DMA\n");
1272 noautodma = 1;
1273 goto obsolete_option;
1274 }
1275
1276 #ifdef CONFIG_IDEPCI_PCIBUS_ORDER
1277 if (!strcmp(s, "ide=reverse")) {
1278 ide_scan_direction = 1;
1279 printk(" : Enabled support for IDE inverse scan order.\n");
1280 return 1;
1281 }
1282 #endif
1283
1284 #ifdef CONFIG_BLK_DEV_IDEACPI
1285 if (!strcmp(s, "ide=noacpi")) {
1286 //printk(" : Disable IDE ACPI support.\n");
1287 ide_noacpi = 1;
1288 return 1;
1289 }
1290 if (!strcmp(s, "ide=acpigtf")) {
1291 //printk(" : Enable IDE ACPI _GTF support.\n");
1292 ide_noacpitfs = 0;
1293 return 1;
1294 }
1295 if (!strcmp(s, "ide=acpionboot")) {
1296 //printk(" : Call IDE ACPI methods on boot.\n");
1297 ide_noacpionboot = 0;
1298 return 1;
1299 }
1300 #endif /* CONFIG_BLK_DEV_IDEACPI */
1301
1302 /*
1303 * Look for drive options: "hdx="
1304 */
1305 if (s[0] == 'h' && s[1] == 'd' && s[2] >= 'a' && s[2] <= max_drive) {
1306 const char *hd_words[] = {
1307 "none", "noprobe", "nowerr", "cdrom", "nodma",
1308 "autotune", "noautotune", "-8", "-9", "-10",
1309 "noflush", "remap", "remap63", "scsi", NULL };
1310 unit = s[2] - 'a';
1311 hw = unit / MAX_DRIVES;
1312 unit = unit % MAX_DRIVES;
1313 hwif = &ide_hwifs[hw];
1314 drive = &hwif->drives[unit];
1315 if (strncmp(s + 4, "ide-", 4) == 0) {
1316 strlcpy(drive->driver_req, s + 4, sizeof(drive->driver_req));
1317 goto done;
1318 }
1319 switch (match_parm(&s[3], hd_words, vals, 3)) {
1320 case -1: /* "none" */
1321 case -2: /* "noprobe" */
1322 drive->noprobe = 1;
1323 goto done;
1324 case -3: /* "nowerr" */
1325 drive->bad_wstat = BAD_R_STAT;
1326 hwif->noprobe = 0;
1327 goto done;
1328 case -4: /* "cdrom" */
1329 drive->present = 1;
1330 drive->media = ide_cdrom;
1331 /* an ATAPI device ignores DRDY */
1332 drive->ready_stat = 0;
1333 hwif->noprobe = 0;
1334 goto done;
1335 case -5: /* nodma */
1336 drive->nodma = 1;
1337 goto done;
1338 case -6: /* "autotune" */
1339 drive->autotune = IDE_TUNE_AUTO;
1340 goto obsolete_option;
1341 case -7: /* "noautotune" */
1342 drive->autotune = IDE_TUNE_NOAUTO;
1343 goto obsolete_option;
1344 case -11: /* noflush */
1345 drive->noflush = 1;
1346 goto done;
1347 case -12: /* "remap" */
1348 drive->remap_0_to_1 = 1;
1349 goto done;
1350 case -13: /* "remap63" */
1351 drive->sect0 = 63;
1352 goto done;
1353 case -14: /* "scsi" */
1354 drive->scsi = 1;
1355 goto done;
1356 case 3: /* cyl,head,sect */
1357 drive->media = ide_disk;
1358 drive->ready_stat = READY_STAT;
1359 drive->cyl = drive->bios_cyl = vals[0];
1360 drive->head = drive->bios_head = vals[1];
1361 drive->sect = drive->bios_sect = vals[2];
1362 drive->present = 1;
1363 drive->forced_geom = 1;
1364 hwif->noprobe = 0;
1365 goto done;
1366 default:
1367 goto bad_option;
1368 }
1369 }
1370
1371 if (s[0] != 'i' || s[1] != 'd' || s[2] != 'e')
1372 goto bad_option;
1373 /*
1374 * Look for bus speed option: "idebus="
1375 */
1376 if (s[3] == 'b' && s[4] == 'u' && s[5] == 's') {
1377 if (match_parm(&s[6], NULL, vals, 1) != 1)
1378 goto bad_option;
1379 if (vals[0] >= 20 && vals[0] <= 66) {
1380 idebus_parameter = vals[0];
1381 } else
1382 printk(" -- BAD BUS SPEED! Expected value from 20 to 66");
1383 goto done;
1384 }
1385 /*
1386 * Look for interface options: "idex="
1387 */
1388 if (s[3] >= '0' && s[3] <= max_hwif) {
1389 /*
1390 * Be VERY CAREFUL changing this: note hardcoded indexes below
1391 * (-8, -9, -10) are reserved to ease the hardcoding.
1392 */
1393 static const char *ide_words[] = {
1394 "noprobe", "serialize", "minus3", "minus4",
1395 "reset", "minus6", "ata66", "minus8", "minus9",
1396 "minus10", "four", "qd65xx", "ht6560b", "cmd640_vlb",
1397 "dtc2278", "umc8672", "ali14xx", NULL };
1398
1399 hw_regs_t hwregs;
1400
1401 hw = s[3] - '0';
1402 hwif = &ide_hwifs[hw];
1403 i = match_parm(&s[4], ide_words, vals, 3);
1404
1405 /*
1406 * Cryptic check to ensure chipset not already set for hwif.
1407 * Note: we can't depend on hwif->chipset here.
1408 */
1409 if ((i >= -18 && i <= -11) || (i > 0 && i <= 3)) {
1410 /* chipset already specified */
1411 if (is_chipset_set[hw])
1412 goto bad_option;
1413 if (i > -18 && i <= -11) {
1414 /* these drivers are for "ide0=" only */
1415 if (hw != 0)
1416 goto bad_hwif;
1417 /* chipset already specified for 2nd port */
1418 if (is_chipset_set[hw+1])
1419 goto bad_option;
1420 }
1421 is_chipset_set[hw] = 1;
1422 printk("\n");
1423 }
1424
1425 switch (i) {
1426 #ifdef CONFIG_BLK_DEV_ALI14XX
1427 case -17: /* "ali14xx" */
1428 probe_ali14xx = 1;
1429 goto done;
1430 #endif
1431 #ifdef CONFIG_BLK_DEV_UMC8672
1432 case -16: /* "umc8672" */
1433 probe_umc8672 = 1;
1434 goto done;
1435 #endif
1436 #ifdef CONFIG_BLK_DEV_DTC2278
1437 case -15: /* "dtc2278" */
1438 probe_dtc2278 = 1;
1439 goto done;
1440 #endif
1441 #ifdef CONFIG_BLK_DEV_CMD640
1442 case -14: /* "cmd640_vlb" */
1443 cmd640_vlb = 1;
1444 goto done;
1445 #endif
1446 #ifdef CONFIG_BLK_DEV_HT6560B
1447 case -13: /* "ht6560b" */
1448 probe_ht6560b = 1;
1449 goto done;
1450 #endif
1451 #ifdef CONFIG_BLK_DEV_QD65XX
1452 case -12: /* "qd65xx" */
1453 probe_qd65xx = 1;
1454 goto done;
1455 #endif
1456 #ifdef CONFIG_BLK_DEV_4DRIVES
1457 case -11: /* "four" drives on one set of ports */
1458 {
1459 ide_hwif_t *mate = &ide_hwifs[hw^1];
1460 mate->drives[0].select.all ^= 0x20;
1461 mate->drives[1].select.all ^= 0x20;
1462 hwif->chipset = mate->chipset = ide_4drives;
1463 mate->irq = hwif->irq;
1464 memcpy(mate->io_ports, hwif->io_ports, sizeof(hwif->io_ports));
1465 hwif->mate = mate;
1466 mate->mate = hwif;
1467 hwif->serialized = mate->serialized = 1;
1468 goto obsolete_option;
1469 }
1470 #endif /* CONFIG_BLK_DEV_4DRIVES */
1471 case -10: /* minus10 */
1472 case -9: /* minus9 */
1473 case -8: /* minus8 */
1474 case -6:
1475 case -4:
1476 case -3:
1477 goto bad_option;
1478 case -7: /* ata66 */
1479 #ifdef CONFIG_BLK_DEV_IDEPCI
1480 /*
1481 * Use ATA_CBL_PATA40_SHORT so drive side
1482 * cable detection is also overriden.
1483 */
1484 hwif->cbl = ATA_CBL_PATA40_SHORT;
1485 goto obsolete_option;
1486 #else
1487 goto bad_hwif;
1488 #endif
1489 case -5: /* "reset" */
1490 hwif->reset = 1;
1491 goto obsolete_option;
1492 case -2: /* "serialize" */
1493 hwif->mate = &ide_hwifs[hw^1];
1494 hwif->mate->mate = hwif;
1495 hwif->serialized = hwif->mate->serialized = 1;
1496 goto obsolete_option;
1497
1498 case -1: /* "noprobe" */
1499 hwif->noprobe = 1;
1500 goto done;
1501
1502 case 1: /* base */
1503 vals[1] = vals[0] + 0x206; /* default ctl */
1504 case 2: /* base,ctl */
1505 vals[2] = 0; /* default irq = probe for it */
1506 case 3: /* base,ctl,irq */
1507 memset(&hwregs, 0, sizeof(hwregs));
1508 ide_init_hwif_ports(&hwregs, vals[0], vals[1], &hwif->irq);
1509 memcpy(hwif->io_ports, hwregs.io_ports, sizeof(hwif->io_ports));
1510 hwif->irq = vals[2];
1511 hwif->noprobe = 0;
1512 hwif->chipset = ide_forced;
1513 goto obsolete_option;
1514
1515 case 0: goto bad_option;
1516 default:
1517 printk(" -- SUPPORT NOT CONFIGURED IN THIS KERNEL\n");
1518 return 1;
1519 }
1520 }
1521 bad_option:
1522 printk(" -- BAD OPTION\n");
1523 return 1;
1524 obsolete_option:
1525 printk(" -- OBSOLETE OPTION, WILL BE REMOVED SOON!\n");
1526 return 1;
1527 bad_hwif:
1528 printk("-- NOT SUPPORTED ON ide%d", hw);
1529 done:
1530 printk("\n");
1531 return 1;
1532 }
1533
1534 EXPORT_SYMBOL(ide_lock);
1535
1536 static int ide_bus_match(struct device *dev, struct device_driver *drv)
1537 {
1538 return 1;
1539 }
1540
1541 static char *media_string(ide_drive_t *drive)
1542 {
1543 switch (drive->media) {
1544 case ide_disk:
1545 return "disk";
1546 case ide_cdrom:
1547 return "cdrom";
1548 case ide_tape:
1549 return "tape";
1550 case ide_floppy:
1551 return "floppy";
1552 case ide_optical:
1553 return "optical";
1554 default:
1555 return "UNKNOWN";
1556 }
1557 }
1558
1559 static ssize_t media_show(struct device *dev, struct device_attribute *attr, char *buf)
1560 {
1561 ide_drive_t *drive = to_ide_device(dev);
1562 return sprintf(buf, "%s\n", media_string(drive));
1563 }
1564
1565 static ssize_t drivename_show(struct device *dev, struct device_attribute *attr, char *buf)
1566 {
1567 ide_drive_t *drive = to_ide_device(dev);
1568 return sprintf(buf, "%s\n", drive->name);
1569 }
1570
1571 static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf)
1572 {
1573 ide_drive_t *drive = to_ide_device(dev);
1574 return sprintf(buf, "ide:m-%s\n", media_string(drive));
1575 }
1576
1577 static ssize_t model_show(struct device *dev, struct device_attribute *attr,
1578 char *buf)
1579 {
1580 ide_drive_t *drive = to_ide_device(dev);
1581 return sprintf(buf, "%s\n", drive->id->model);
1582 }
1583
1584 static ssize_t firmware_show(struct device *dev, struct device_attribute *attr,
1585 char *buf)
1586 {
1587 ide_drive_t *drive = to_ide_device(dev);
1588 return sprintf(buf, "%s\n", drive->id->fw_rev);
1589 }
1590
1591 static ssize_t serial_show(struct device *dev, struct device_attribute *attr,
1592 char *buf)
1593 {
1594 ide_drive_t *drive = to_ide_device(dev);
1595 return sprintf(buf, "%s\n", drive->id->serial_no);
1596 }
1597
1598 static struct device_attribute ide_dev_attrs[] = {
1599 __ATTR_RO(media),
1600 __ATTR_RO(drivename),
1601 __ATTR_RO(modalias),
1602 __ATTR_RO(model),
1603 __ATTR_RO(firmware),
1604 __ATTR(serial, 0400, serial_show, NULL),
1605 __ATTR_NULL
1606 };
1607
1608 static int ide_uevent(struct device *dev, struct kobj_uevent_env *env)
1609 {
1610 ide_drive_t *drive = to_ide_device(dev);
1611
1612 add_uevent_var(env, "MEDIA=%s", media_string(drive));
1613 add_uevent_var(env, "DRIVENAME=%s", drive->name);
1614 add_uevent_var(env, "MODALIAS=ide:m-%s", media_string(drive));
1615 return 0;
1616 }
1617
1618 static int generic_ide_probe(struct device *dev)
1619 {
1620 ide_drive_t *drive = to_ide_device(dev);
1621 ide_driver_t *drv = to_ide_driver(dev->driver);
1622
1623 return drv->probe ? drv->probe(drive) : -ENODEV;
1624 }
1625
1626 static int generic_ide_remove(struct device *dev)
1627 {
1628 ide_drive_t *drive = to_ide_device(dev);
1629 ide_driver_t *drv = to_ide_driver(dev->driver);
1630
1631 if (drv->remove)
1632 drv->remove(drive);
1633
1634 return 0;
1635 }
1636
1637 static void generic_ide_shutdown(struct device *dev)
1638 {
1639 ide_drive_t *drive = to_ide_device(dev);
1640 ide_driver_t *drv = to_ide_driver(dev->driver);
1641
1642 if (dev->driver && drv->shutdown)
1643 drv->shutdown(drive);
1644 }
1645
1646 struct bus_type ide_bus_type = {
1647 .name = "ide",
1648 .match = ide_bus_match,
1649 .uevent = ide_uevent,
1650 .probe = generic_ide_probe,
1651 .remove = generic_ide_remove,
1652 .shutdown = generic_ide_shutdown,
1653 .dev_attrs = ide_dev_attrs,
1654 .suspend = generic_ide_suspend,
1655 .resume = generic_ide_resume,
1656 };
1657
1658 EXPORT_SYMBOL_GPL(ide_bus_type);
1659
1660 /*
1661 * This is gets invoked once during initialization, to set *everything* up
1662 */
1663 static int __init ide_init(void)
1664 {
1665 int ret;
1666
1667 printk(KERN_INFO "Uniform Multi-Platform E-IDE driver " REVISION "\n");
1668 system_bus_speed = ide_system_bus_speed();
1669
1670 ret = bus_register(&ide_bus_type);
1671 if (ret < 0) {
1672 printk(KERN_WARNING "IDE: bus_register error: %d\n", ret);
1673 return ret;
1674 }
1675
1676 init_ide_data();
1677
1678 proc_ide_create();
1679
1680 return 0;
1681 }
1682
1683 #ifdef MODULE
1684 static char *options = NULL;
1685 module_param(options, charp, 0);
1686 MODULE_LICENSE("GPL");
1687
1688 static void __init parse_options (char *line)
1689 {
1690 char *next = line;
1691
1692 if (line == NULL || !*line)
1693 return;
1694 while ((line = next) != NULL) {
1695 if ((next = strchr(line,' ')) != NULL)
1696 *next++ = 0;
1697 if (!ide_setup(line))
1698 printk (KERN_INFO "Unknown option '%s'\n", line);
1699 }
1700 }
1701
1702 int __init init_module (void)
1703 {
1704 parse_options(options);
1705 return ide_init();
1706 }
1707
1708 void __exit cleanup_module (void)
1709 {
1710 int index;
1711
1712 for (index = 0; index < MAX_HWIFS; ++index)
1713 ide_unregister(index);
1714
1715 proc_ide_destroy();
1716
1717 bus_unregister(&ide_bus_type);
1718 }
1719
1720 #else /* !MODULE */
1721
1722 __setup("", ide_setup);
1723
1724 module_init(ide_init);
1725
1726 #endif /* MODULE */
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