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Add a 00-INDEX file to Documentation/sysctl/
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / ide / ide.c
blob5b090662683ed25031b69e10593fc8582951c941
1 /*
2 * linux/drivers/ide/ide.c Version 7.00beta2 Mar 05 2003
3 *
4 * Copyright (C) 1994-1998 Linus Torvalds & authors (see below)
5 */
6
7 /*
8 * Mostly written by Mark Lord <mlord@pobox.com>
9 * and Gadi Oxman <gadio@netvision.net.il>
10 * and Andre Hedrick <andre@linux-ide.org>
11 *
12 * See linux/MAINTAINERS for address of current maintainer.
13 *
14 * This is the multiple IDE interface driver, as evolved from hd.c.
15 * It supports up to MAX_HWIFS IDE interfaces, on one or more IRQs
16 * (usually 14 & 15).
17 * There can be up to two drives per interface, as per the ATA-2 spec.
18 *
19 * ...
20 *
21 * From hd.c:
22 * |
23 * | It traverses the request-list, using interrupts to jump between functions.
24 * | As nearly all functions can be called within interrupts, we may not sleep.
25 * | Special care is recommended. Have Fun!
26 * |
27 * | modified by Drew Eckhardt to check nr of hd's from the CMOS.
28 * |
29 * | Thanks to Branko Lankester, lankeste@fwi.uva.nl, who found a bug
30 * | in the early extended-partition checks and added DM partitions.
31 * |
32 * | Early work on error handling by Mika Liljeberg (liljeber@cs.Helsinki.FI).
33 * |
34 * | IRQ-unmask, drive-id, multiple-mode, support for ">16 heads",
35 * | and general streamlining by Mark Lord (mlord@pobox.com).
36 *
37 * October, 1994 -- Complete line-by-line overhaul for linux 1.1.x, by:
38 *
39 * Mark Lord (mlord@pobox.com) (IDE Perf.Pkg)
40 * Delman Lee (delman@ieee.org) ("Mr. atdisk2")
41 * Scott Snyder (snyder@fnald0.fnal.gov) (ATAPI IDE cd-rom)
42 *
43 * This was a rewrite of just about everything from hd.c, though some original
44 * code is still sprinkled about. Think of it as a major evolution, with
45 * inspiration from lots of linux users, esp. hamish@zot.apana.org.au
46 */
47
48 #define REVISION "Revision: 7.00alpha2"
49 #define VERSION "Id: ide.c 7.00a2 20020906"
50
51 #define _IDE_C /* Tell ide.h it's really us */
52
53 #include <linux/module.h>
54 #include <linux/types.h>
55 #include <linux/string.h>
56 #include <linux/kernel.h>
57 #include <linux/timer.h>
58 #include <linux/mm.h>
59 #include <linux/interrupt.h>
60 #include <linux/major.h>
61 #include <linux/errno.h>
62 #include <linux/genhd.h>
63 #include <linux/blkpg.h>
64 #include <linux/slab.h>
65 #include <linux/init.h>
66 #include <linux/pci.h>
67 #include <linux/delay.h>
68 #include <linux/ide.h>
69 #include <linux/completion.h>
70 #include <linux/reboot.h>
71 #include <linux/cdrom.h>
72 #include <linux/seq_file.h>
73 #include <linux/device.h>
74 #include <linux/bitops.h>
75
76 #include <asm/byteorder.h>
77 #include <asm/irq.h>
78 #include <asm/uaccess.h>
79 #include <asm/io.h>
80
81
82 /* default maximum number of failures */
83 #define IDE_DEFAULT_MAX_FAILURES 1
84
85 static const u8 ide_hwif_to_major[] = { IDE0_MAJOR, IDE1_MAJOR,
86 IDE2_MAJOR, IDE3_MAJOR,
87 IDE4_MAJOR, IDE5_MAJOR,
88 IDE6_MAJOR, IDE7_MAJOR,
89 IDE8_MAJOR, IDE9_MAJOR };
90
91 static int idebus_parameter; /* holds the "idebus=" parameter */
92 static int system_bus_speed; /* holds what we think is VESA/PCI bus speed */
93
94 DEFINE_MUTEX(ide_cfg_mtx);
95 __cacheline_aligned_in_smp DEFINE_SPINLOCK(ide_lock);
96
97 #ifdef CONFIG_IDEPCI_PCIBUS_ORDER
98 static int ide_scan_direction; /* THIS was formerly 2.2.x pci=reverse */
99 #endif
100
101 int noautodma = 0;
102
103 #ifdef CONFIG_BLK_DEV_IDEACPI
104 int ide_noacpi = 0;
105 int ide_noacpitfs = 1;
106 int ide_noacpionboot = 1;
107 #endif
108
109 /*
110 * This is declared extern in ide.h, for access by other IDE modules:
111 */
112 ide_hwif_t ide_hwifs[MAX_HWIFS]; /* master data repository */
113
114 EXPORT_SYMBOL(ide_hwifs);
115
116 /*
117 * Do not even *think* about calling this!
118 */
119 static void init_hwif_data(ide_hwif_t *hwif, unsigned int index)
120 {
121 unsigned int unit;
122
123 /* bulk initialize hwif & drive info with zeros */
124 memset(hwif, 0, sizeof(ide_hwif_t));
125
126 /* fill in any non-zero initial values */
127 hwif->index = index;
128 hwif->major = ide_hwif_to_major[index];
129
130 hwif->name[0] = 'i';
131 hwif->name[1] = 'd';
132 hwif->name[2] = 'e';
133 hwif->name[3] = '0' + index;
134
135 hwif->bus_state = BUSSTATE_ON;
136
137 hwif->atapi_dma = 0; /* disable all atapi dma */
138
139 init_completion(&hwif->gendev_rel_comp);
140
141 default_hwif_iops(hwif);
142 default_hwif_transport(hwif);
143 for (unit = 0; unit < MAX_DRIVES; ++unit) {
144 ide_drive_t *drive = &hwif->drives[unit];
145
146 drive->media = ide_disk;
147 drive->select.all = (unit<<4)|0xa0;
148 drive->hwif = hwif;
149 drive->ctl = 0x08;
150 drive->ready_stat = READY_STAT;
151 drive->bad_wstat = BAD_W_STAT;
152 drive->special.b.recalibrate = 1;
153 drive->special.b.set_geometry = 1;
154 drive->name[0] = 'h';
155 drive->name[1] = 'd';
156 drive->name[2] = 'a' + (index * MAX_DRIVES) + unit;
157 drive->max_failures = IDE_DEFAULT_MAX_FAILURES;
158 drive->using_dma = 0;
159 drive->vdma = 0;
160 INIT_LIST_HEAD(&drive->list);
161 init_completion(&drive->gendev_rel_comp);
162 }
163 }
164
165 static void init_hwif_default(ide_hwif_t *hwif, unsigned int index)
166 {
167 hw_regs_t hw;
168
169 memset(&hw, 0, sizeof(hw_regs_t));
170
171 ide_init_hwif_ports(&hw, ide_default_io_base(index), 0, &hwif->irq);
172
173 memcpy(&hwif->hw, &hw, sizeof(hw));
174 memcpy(hwif->io_ports, hw.io_ports, sizeof(hw.io_ports));
175
176 hwif->noprobe = !hwif->io_ports[IDE_DATA_OFFSET];
177 #ifdef CONFIG_BLK_DEV_HD
178 if (hwif->io_ports[IDE_DATA_OFFSET] == HD_DATA)
179 hwif->noprobe = 1; /* may be overridden by ide_setup() */
180 #endif
181 }
182
183 extern void ide_arm_init(void);
184
185 /*
186 * init_ide_data() sets reasonable default values into all fields
187 * of all instances of the hwifs and drives, but only on the first call.
188 * Subsequent calls have no effect (they don't wipe out anything).
189 *
190 * This routine is normally called at driver initialization time,
191 * but may also be called MUCH earlier during kernel "command-line"
192 * parameter processing. As such, we cannot depend on any other parts
193 * of the kernel (such as memory allocation) to be functioning yet.
194 *
195 * This is too bad, as otherwise we could dynamically allocate the
196 * ide_drive_t structs as needed, rather than always consuming memory
197 * for the max possible number (MAX_HWIFS * MAX_DRIVES) of them.
198 *
199 * FIXME: We should stuff the setup data into __init and copy the
200 * relevant hwifs/allocate them properly during boot.
201 */
202 #define MAGIC_COOKIE 0x12345678
203 static void __init init_ide_data (void)
204 {
205 ide_hwif_t *hwif;
206 unsigned int index;
207 static unsigned long magic_cookie = MAGIC_COOKIE;
208
209 if (magic_cookie != MAGIC_COOKIE)
210 return; /* already initialized */
211 magic_cookie = 0;
212
213 /* Initialise all interface structures */
214 for (index = 0; index < MAX_HWIFS; ++index) {
215 hwif = &ide_hwifs[index];
216 init_hwif_data(hwif, index);
217 init_hwif_default(hwif, index);
218 #if !defined(CONFIG_PPC32) || !defined(CONFIG_PCI)
219 hwif->irq = hwif->hw.irq =
220 ide_init_default_irq(hwif->io_ports[IDE_DATA_OFFSET]);
221 #endif
222 }
223 #ifdef CONFIG_IDE_ARM
224 ide_arm_init();
225 #endif
226 }
227
228 /**
229 * ide_system_bus_speed - guess bus speed
230 *
231 * ide_system_bus_speed() returns what we think is the system VESA/PCI
232 * bus speed (in MHz). This is used for calculating interface PIO timings.
233 * The default is 40 for known PCI systems, 50 otherwise.
234 * The "idebus=xx" parameter can be used to override this value.
235 * The actual value to be used is computed/displayed the first time
236 * through. Drivers should only use this as a last resort.
237 *
238 * Returns a guessed speed in MHz.
239 */
240
241 static int ide_system_bus_speed(void)
242 {
243 #ifdef CONFIG_PCI
244 static struct pci_device_id pci_default[] = {
245 { PCI_DEVICE(PCI_ANY_ID, PCI_ANY_ID) },
246 { }
247 };
248 #else
249 #define pci_default 0
250 #endif /* CONFIG_PCI */
251
252 if (!system_bus_speed) {
253 if (idebus_parameter) {
254 /* user supplied value */
255 system_bus_speed = idebus_parameter;
256 } else if (pci_dev_present(pci_default)) {
257 /* safe default value for PCI */
258 system_bus_speed = 33;
259 } else {
260 /* safe default value for VESA and PCI */
261 system_bus_speed = 50;
262 }
263 printk(KERN_INFO "ide: Assuming %dMHz system bus speed "
264 "for PIO modes%s\n", system_bus_speed,
265 idebus_parameter ? "" : "; override with idebus=xx");
266 }
267 return system_bus_speed;
268 }
269
270 static struct resource* hwif_request_region(ide_hwif_t *hwif,
271 unsigned long addr, int num)
272 {
273 struct resource *res = request_region(addr, num, hwif->name);
274
275 if (!res)
276 printk(KERN_ERR "%s: I/O resource 0x%lX-0x%lX not free.\n",
277 hwif->name, addr, addr+num-1);
278 return res;
279 }
280
281 /**
282 * ide_hwif_request_regions - request resources for IDE
283 * @hwif: interface to use
284 *
285 * Requests all the needed resources for an interface.
286 * Right now core IDE code does this work which is deeply wrong.
287 * MMIO leaves it to the controller driver,
288 * PIO will migrate this way over time.
289 */
290
291 int ide_hwif_request_regions(ide_hwif_t *hwif)
292 {
293 unsigned long addr;
294 unsigned int i;
295
296 if (hwif->mmio)
297 return 0;
298 addr = hwif->io_ports[IDE_CONTROL_OFFSET];
299 if (addr && !hwif_request_region(hwif, addr, 1))
300 goto control_region_busy;
301 hwif->straight8 = 0;
302 addr = hwif->io_ports[IDE_DATA_OFFSET];
303 if ((addr | 7) == hwif->io_ports[IDE_STATUS_OFFSET]) {
304 if (!hwif_request_region(hwif, addr, 8))
305 goto data_region_busy;
306 hwif->straight8 = 1;
307 return 0;
308 }
309 for (i = IDE_DATA_OFFSET; i <= IDE_STATUS_OFFSET; i++) {
310 addr = hwif->io_ports[i];
311 if (!hwif_request_region(hwif, addr, 1)) {
312 while (--i)
313 release_region(addr, 1);
314 goto data_region_busy;
315 }
316 }
317 return 0;
318
319 data_region_busy:
320 addr = hwif->io_ports[IDE_CONTROL_OFFSET];
321 if (addr)
322 release_region(addr, 1);
323 control_region_busy:
324 /* If any errors are return, we drop the hwif interface. */
325 return -EBUSY;
326 }
327
328 /**
329 * ide_hwif_release_regions - free IDE resources
330 *
331 * Note that we only release the standard ports,
332 * and do not even try to handle any extra ports
333 * allocated for weird IDE interface chipsets.
334 *
335 * Note also that we don't yet handle mmio resources here. More
336 * importantly our caller should be doing this so we need to
337 * restructure this as a helper function for drivers.
338 */
339
340 void ide_hwif_release_regions(ide_hwif_t *hwif)
341 {
342 u32 i = 0;
343
344 if (hwif->mmio)
345 return;
346 if (hwif->io_ports[IDE_CONTROL_OFFSET])
347 release_region(hwif->io_ports[IDE_CONTROL_OFFSET], 1);
348 if (hwif->straight8) {
349 release_region(hwif->io_ports[IDE_DATA_OFFSET], 8);
350 return;
351 }
352 for (i = IDE_DATA_OFFSET; i <= IDE_STATUS_OFFSET; i++)
353 if (hwif->io_ports[i])
354 release_region(hwif->io_ports[i], 1);
355 }
356
357 /**
358 * ide_hwif_restore - restore hwif to template
359 * @hwif: hwif to update
360 * @tmp_hwif: template
361 *
362 * Restore hwif to a previous state by copying most settings
363 * from the template.
364 */
365
366 static void ide_hwif_restore(ide_hwif_t *hwif, ide_hwif_t *tmp_hwif)
367 {
368 hwif->hwgroup = tmp_hwif->hwgroup;
369
370 hwif->gendev.parent = tmp_hwif->gendev.parent;
371
372 hwif->proc = tmp_hwif->proc;
373
374 hwif->major = tmp_hwif->major;
375 hwif->straight8 = tmp_hwif->straight8;
376 hwif->bus_state = tmp_hwif->bus_state;
377
378 hwif->host_flags = tmp_hwif->host_flags;
379
380 hwif->pio_mask = tmp_hwif->pio_mask;
381
382 hwif->atapi_dma = tmp_hwif->atapi_dma;
383 hwif->ultra_mask = tmp_hwif->ultra_mask;
384 hwif->mwdma_mask = tmp_hwif->mwdma_mask;
385 hwif->swdma_mask = tmp_hwif->swdma_mask;
386
387 hwif->cbl = tmp_hwif->cbl;
388
389 hwif->chipset = tmp_hwif->chipset;
390 hwif->hold = tmp_hwif->hold;
391
392 #ifdef CONFIG_BLK_DEV_IDEPCI
393 hwif->pci_dev = tmp_hwif->pci_dev;
394 hwif->cds = tmp_hwif->cds;
395 #endif
396
397 hwif->set_pio_mode = tmp_hwif->set_pio_mode;
398 hwif->set_dma_mode = tmp_hwif->set_dma_mode;
399 hwif->mdma_filter = tmp_hwif->mdma_filter;
400 hwif->udma_filter = tmp_hwif->udma_filter;
401 hwif->selectproc = tmp_hwif->selectproc;
402 hwif->reset_poll = tmp_hwif->reset_poll;
403 hwif->pre_reset = tmp_hwif->pre_reset;
404 hwif->resetproc = tmp_hwif->resetproc;
405 hwif->intrproc = tmp_hwif->intrproc;
406 hwif->maskproc = tmp_hwif->maskproc;
407 hwif->quirkproc = tmp_hwif->quirkproc;
408 hwif->busproc = tmp_hwif->busproc;
409
410 hwif->ata_input_data = tmp_hwif->ata_input_data;
411 hwif->ata_output_data = tmp_hwif->ata_output_data;
412 hwif->atapi_input_bytes = tmp_hwif->atapi_input_bytes;
413 hwif->atapi_output_bytes = tmp_hwif->atapi_output_bytes;
414
415 hwif->dma_setup = tmp_hwif->dma_setup;
416 hwif->dma_exec_cmd = tmp_hwif->dma_exec_cmd;
417 hwif->dma_start = tmp_hwif->dma_start;
418 hwif->ide_dma_end = tmp_hwif->ide_dma_end;
419 hwif->ide_dma_on = tmp_hwif->ide_dma_on;
420 hwif->dma_off_quietly = tmp_hwif->dma_off_quietly;
421 hwif->ide_dma_test_irq = tmp_hwif->ide_dma_test_irq;
422 hwif->ide_dma_clear_irq = tmp_hwif->ide_dma_clear_irq;
423 hwif->dma_host_on = tmp_hwif->dma_host_on;
424 hwif->dma_host_off = tmp_hwif->dma_host_off;
425 hwif->dma_lost_irq = tmp_hwif->dma_lost_irq;
426 hwif->dma_timeout = tmp_hwif->dma_timeout;
427
428 hwif->OUTB = tmp_hwif->OUTB;
429 hwif->OUTBSYNC = tmp_hwif->OUTBSYNC;
430 hwif->OUTW = tmp_hwif->OUTW;
431 hwif->OUTSW = tmp_hwif->OUTSW;
432 hwif->OUTSL = tmp_hwif->OUTSL;
433
434 hwif->INB = tmp_hwif->INB;
435 hwif->INW = tmp_hwif->INW;
436 hwif->INSW = tmp_hwif->INSW;
437 hwif->INSL = tmp_hwif->INSL;
438
439 hwif->sg_max_nents = tmp_hwif->sg_max_nents;
440
441 hwif->mmio = tmp_hwif->mmio;
442 hwif->rqsize = tmp_hwif->rqsize;
443 hwif->no_lba48 = tmp_hwif->no_lba48;
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_master = tmp_hwif->dma_master;
451 hwif->dma_command = tmp_hwif->dma_command;
452 hwif->dma_vendor1 = tmp_hwif->dma_vendor1;
453 hwif->dma_status = tmp_hwif->dma_status;
454 hwif->dma_vendor3 = tmp_hwif->dma_vendor3;
455 hwif->dma_prdtable = tmp_hwif->dma_prdtable;
456
457 hwif->config_data = tmp_hwif->config_data;
458 hwif->select_data = tmp_hwif->select_data;
459 hwif->extra_base = tmp_hwif->extra_base;
460 hwif->extra_ports = tmp_hwif->extra_ports;
461
462 hwif->hwif_data = tmp_hwif->hwif_data;
463 }
464
465 /**
466 * ide_unregister - free an IDE interface
467 * @index: index of interface (will change soon to a pointer)
468 *
469 * Perform the final unregister of an IDE interface. At the moment
470 * we don't refcount interfaces so this will also get split up.
471 *
472 * Locking:
473 * The caller must not hold the IDE locks
474 * The drive present/vanishing is not yet properly locked
475 * Take care with the callbacks. These have been split to avoid
476 * deadlocking the IDE layer. The shutdown callback is called
477 * before we take the lock and free resources. It is up to the
478 * caller to be sure there is no pending I/O here, and that
479 * the interface will not be reopened (present/vanishing locking
480 * isn't yet done BTW). After we commit to the final kill we
481 * call the cleanup callback with the ide locks held.
482 *
483 * Unregister restores the hwif structures to the default state.
484 * This is raving bonkers.
485 */
486
487 void ide_unregister(unsigned int index)
488 {
489 ide_drive_t *drive;
490 ide_hwif_t *hwif, *g;
491 static ide_hwif_t tmp_hwif; /* protected by ide_cfg_mtx */
492 ide_hwgroup_t *hwgroup;
493 int irq_count = 0, unit;
494
495 BUG_ON(index >= MAX_HWIFS);
496
497 BUG_ON(in_interrupt());
498 BUG_ON(irqs_disabled());
499 mutex_lock(&ide_cfg_mtx);
500 spin_lock_irq(&ide_lock);
501 hwif = &ide_hwifs[index];
502 if (!hwif->present)
503 goto abort;
504 for (unit = 0; unit < MAX_DRIVES; ++unit) {
505 drive = &hwif->drives[unit];
506 if (!drive->present)
507 continue;
508 spin_unlock_irq(&ide_lock);
509 device_unregister(&drive->gendev);
510 wait_for_completion(&drive->gendev_rel_comp);
511 spin_lock_irq(&ide_lock);
512 }
513 hwif->present = 0;
514
515 spin_unlock_irq(&ide_lock);
516
517 ide_proc_unregister_port(hwif);
518
519 hwgroup = hwif->hwgroup;
520 /*
521 * free the irq if we were the only hwif using it
522 */
523 g = hwgroup->hwif;
524 do {
525 if (g->irq == hwif->irq)
526 ++irq_count;
527 g = g->next;
528 } while (g != hwgroup->hwif);
529 if (irq_count == 1)
530 free_irq(hwif->irq, hwgroup);
531
532 spin_lock_irq(&ide_lock);
533 /*
534 * Note that we only release the standard ports,
535 * and do not even try to handle any extra ports
536 * allocated for weird IDE interface chipsets.
537 */
538 ide_hwif_release_regions(hwif);
539
540 /*
541 * Remove us from the hwgroup, and free
542 * the hwgroup if we were the only member
543 */
544 if (hwif->next == hwif) {
545 BUG_ON(hwgroup->hwif != hwif);
546 kfree(hwgroup);
547 } else {
548 /* There is another interface in hwgroup.
549 * Unlink us, and set hwgroup->drive and ->hwif to
550 * something sane.
551 */
552 g = hwgroup->hwif;
553 while (g->next != hwif)
554 g = g->next;
555 g->next = hwif->next;
556 if (hwgroup->hwif == hwif) {
557 /* Chose a random hwif for hwgroup->hwif.
558 * It's guaranteed that there are no drives
559 * left in the hwgroup.
560 */
561 BUG_ON(hwgroup->drive != NULL);
562 hwgroup->hwif = g;
563 }
564 BUG_ON(hwgroup->hwif == hwif);
565 }
566
567 /* More messed up locking ... */
568 spin_unlock_irq(&ide_lock);
569 device_unregister(&hwif->gendev);
570 wait_for_completion(&hwif->gendev_rel_comp);
571
572 /*
573 * Remove us from the kernel's knowledge
574 */
575 blk_unregister_region(MKDEV(hwif->major, 0), MAX_DRIVES<<PARTN_BITS);
576 kfree(hwif->sg_table);
577 unregister_blkdev(hwif->major, hwif->name);
578 spin_lock_irq(&ide_lock);
579
580 if (hwif->dma_base) {
581 (void) ide_release_dma(hwif);
582
583 hwif->dma_base = 0;
584 hwif->dma_master = 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 /* copy original settings */
596 tmp_hwif = *hwif;
597
598 /* restore hwif data to pristine status */
599 init_hwif_data(hwif, index);
600 init_hwif_default(hwif, index);
601
602 ide_hwif_restore(hwif, &tmp_hwif);
603
604 abort:
605 spin_unlock_irq(&ide_lock);
606 mutex_unlock(&ide_cfg_mtx);
607 }
608
609 EXPORT_SYMBOL(ide_unregister);
610
611
612 /**
613 * ide_setup_ports - set up IDE interface ports
614 * @hw: register descriptions
615 * @base: base register
616 * @offsets: table of register offsets
617 * @ctrl: control register
618 * @ack_irq: IRQ ack
619 * @irq: interrupt lie
620 *
621 * Setup hw_regs_t structure described by parameters. You
622 * may set up the hw structure yourself OR use this routine to
623 * do it for you. This is basically a helper
624 *
625 */
626
627 void ide_setup_ports ( hw_regs_t *hw,
628 unsigned long base, int *offsets,
629 unsigned long ctrl, unsigned long intr,
630 ide_ack_intr_t *ack_intr,
631 /*
632 * ide_io_ops_t *iops,
633 */
634 int irq)
635 {
636 int i;
637
638 memset(hw, 0, sizeof(hw_regs_t));
639 for (i = 0; i < IDE_NR_PORTS; i++) {
640 if (offsets[i] == -1) {
641 switch(i) {
642 case IDE_CONTROL_OFFSET:
643 hw->io_ports[i] = ctrl;
644 break;
645 #if defined(CONFIG_AMIGA) || defined(CONFIG_MAC)
646 case IDE_IRQ_OFFSET:
647 hw->io_ports[i] = intr;
648 break;
649 #endif /* (CONFIG_AMIGA) || (CONFIG_MAC) */
650 default:
651 hw->io_ports[i] = 0;
652 break;
653 }
654 } else {
655 hw->io_ports[i] = base + offsets[i];
656 }
657 }
658 hw->irq = irq;
659 hw->dma = NO_DMA;
660 hw->ack_intr = ack_intr;
661 /*
662 * hw->iops = iops;
663 */
664 }
665
666 /**
667 * ide_register_hw_with_fixup - register IDE interface
668 * @hw: hardware registers
669 * @initializing: set while initializing built-in drivers
670 * @hwifp: pointer to returned hwif
671 * @fixup: fixup function
672 *
673 * Register an IDE interface, specifying exactly the registers etc.
674 * Set init=1 iff calling before probes have taken place.
675 *
676 * Returns -1 on error.
677 */
678
679 int ide_register_hw_with_fixup(hw_regs_t *hw, int initializing,
680 ide_hwif_t **hwifp,
681 void(*fixup)(ide_hwif_t *hwif))
682 {
683 int index, retry = 1;
684 ide_hwif_t *hwif;
685
686 do {
687 for (index = 0; index < MAX_HWIFS; ++index) {
688 hwif = &ide_hwifs[index];
689 if (hwif->hw.io_ports[IDE_DATA_OFFSET] == hw->io_ports[IDE_DATA_OFFSET])
690 goto found;
691 }
692 for (index = 0; index < MAX_HWIFS; ++index) {
693 hwif = &ide_hwifs[index];
694 if (hwif->hold)
695 continue;
696 if ((!hwif->present && !hwif->mate && !initializing) ||
697 (!hwif->hw.io_ports[IDE_DATA_OFFSET] && initializing))
698 goto found;
699 }
700 for (index = 0; index < MAX_HWIFS; index++)
701 ide_unregister(index);
702 } while (retry--);
703 return -1;
704 found:
705 if (hwif->present)
706 ide_unregister(index);
707 else if (!hwif->hold) {
708 init_hwif_data(hwif, index);
709 init_hwif_default(hwif, index);
710 }
711 if (hwif->present)
712 return -1;
713 memcpy(&hwif->hw, hw, sizeof(*hw));
714 memcpy(hwif->io_ports, hwif->hw.io_ports, sizeof(hwif->hw.io_ports));
715 hwif->irq = hw->irq;
716 hwif->noprobe = 0;
717 hwif->chipset = hw->chipset;
718 hwif->gendev.parent = hw->dev;
719
720 if (!initializing) {
721 probe_hwif_init_with_fixup(hwif, fixup);
722 ide_proc_register_port(hwif);
723 }
724
725 if (hwifp)
726 *hwifp = hwif;
727
728 return (initializing || hwif->present) ? index : -1;
729 }
730
731 EXPORT_SYMBOL(ide_register_hw_with_fixup);
732
733 int ide_register_hw(hw_regs_t *hw, int initializing, ide_hwif_t **hwifp)
734 {
735 return ide_register_hw_with_fixup(hw, initializing, hwifp, NULL);
736 }
737
738 EXPORT_SYMBOL(ide_register_hw);
739
740 /*
741 * Locks for IDE setting functionality
742 */
743
744 DEFINE_MUTEX(ide_setting_mtx);
745
746 EXPORT_SYMBOL_GPL(ide_setting_mtx);
747
748 /**
749 * ide_spin_wait_hwgroup - wait for group
750 * @drive: drive in the group
751 *
752 * Wait for an IDE device group to go non busy and then return
753 * holding the ide_lock which guards the hwgroup->busy status
754 * and right to use it.
755 */
756
757 int ide_spin_wait_hwgroup (ide_drive_t *drive)
758 {
759 ide_hwgroup_t *hwgroup = HWGROUP(drive);
760 unsigned long timeout = jiffies + (3 * HZ);
761
762 spin_lock_irq(&ide_lock);
763
764 while (hwgroup->busy) {
765 unsigned long lflags;
766 spin_unlock_irq(&ide_lock);
767 local_irq_set(lflags);
768 if (time_after(jiffies, timeout)) {
769 local_irq_restore(lflags);
770 printk(KERN_ERR "%s: channel busy\n", drive->name);
771 return -EBUSY;
772 }
773 local_irq_restore(lflags);
774 spin_lock_irq(&ide_lock);
775 }
776 return 0;
777 }
778
779 EXPORT_SYMBOL(ide_spin_wait_hwgroup);
780
781 int set_io_32bit(ide_drive_t *drive, int arg)
782 {
783 if (drive->no_io_32bit)
784 return -EPERM;
785
786 if (arg < 0 || arg > 1 + (SUPPORT_VLB_SYNC << 1))
787 return -EINVAL;
788
789 drive->io_32bit = arg;
790 #ifdef CONFIG_BLK_DEV_DTC2278
791 if (HWIF(drive)->chipset == ide_dtc2278)
792 HWIF(drive)->drives[!drive->select.b.unit].io_32bit = arg;
793 #endif /* CONFIG_BLK_DEV_DTC2278 */
794 return 0;
795 }
796
797 static int set_ksettings(ide_drive_t *drive, int arg)
798 {
799 if (arg < 0 || arg > 1)
800 return -EINVAL;
801
802 if (ide_spin_wait_hwgroup(drive))
803 return -EBUSY;
804 drive->keep_settings = arg;
805 spin_unlock_irq(&ide_lock);
806
807 return 0;
808 }
809
810 int set_using_dma(ide_drive_t *drive, int arg)
811 {
812 #ifdef CONFIG_BLK_DEV_IDEDMA
813 ide_hwif_t *hwif = drive->hwif;
814 int err = -EPERM;
815
816 if (arg < 0 || arg > 1)
817 return -EINVAL;
818
819 if (!drive->id || !(drive->id->capability & 1))
820 goto out;
821
822 if (hwif->ide_dma_on == NULL)
823 goto out;
824
825 err = -EBUSY;
826 if (ide_spin_wait_hwgroup(drive))
827 goto out;
828 /*
829 * set ->busy flag, unlock and let it ride
830 */
831 hwif->hwgroup->busy = 1;
832 spin_unlock_irq(&ide_lock);
833
834 err = 0;
835
836 if (arg) {
837 hwif->dma_off_quietly(drive);
838 if (ide_set_dma(drive) || hwif->ide_dma_on(drive))
839 err = -EIO;
840 } else
841 ide_dma_off(drive);
842
843 /*
844 * lock, clear ->busy flag and unlock before leaving
845 */
846 spin_lock_irq(&ide_lock);
847 hwif->hwgroup->busy = 0;
848 spin_unlock_irq(&ide_lock);
849 out:
850 return err;
851 #else
852 if (arg < 0 || arg > 1)
853 return -EINVAL;
854
855 return -EPERM;
856 #endif
857 }
858
859 int set_pio_mode(ide_drive_t *drive, int arg)
860 {
861 struct request rq;
862
863 if (arg < 0 || arg > 255)
864 return -EINVAL;
865
866 if (drive->hwif->set_pio_mode == NULL)
867 return -ENOSYS;
868
869 if (drive->special.b.set_tune)
870 return -EBUSY;
871 ide_init_drive_cmd(&rq);
872 drive->tune_req = (u8) arg;
873 drive->special.b.set_tune = 1;
874 (void) ide_do_drive_cmd(drive, &rq, ide_wait);
875 return 0;
876 }
877
878 static int set_unmaskirq(ide_drive_t *drive, int arg)
879 {
880 if (drive->no_unmask)
881 return -EPERM;
882
883 if (arg < 0 || arg > 1)
884 return -EINVAL;
885
886 if (ide_spin_wait_hwgroup(drive))
887 return -EBUSY;
888 drive->unmask = arg;
889 spin_unlock_irq(&ide_lock);
890
891 return 0;
892 }
893
894 /**
895 * system_bus_clock - clock guess
896 *
897 * External version of the bus clock guess used by very old IDE drivers
898 * for things like VLB timings. Should not be used.
899 */
900
901 int system_bus_clock (void)
902 {
903 return((int) ((!system_bus_speed) ? ide_system_bus_speed() : system_bus_speed ));
904 }
905
906 EXPORT_SYMBOL(system_bus_clock);
907
908 static int generic_ide_suspend(struct device *dev, pm_message_t mesg)
909 {
910 ide_drive_t *drive = dev->driver_data;
911 ide_hwif_t *hwif = HWIF(drive);
912 struct request rq;
913 struct request_pm_state rqpm;
914 ide_task_t args;
915 int ret;
916
917 /* Call ACPI _GTM only once */
918 if (!(drive->dn % 2))
919 ide_acpi_get_timing(hwif);
920
921 memset(&rq, 0, sizeof(rq));
922 memset(&rqpm, 0, sizeof(rqpm));
923 memset(&args, 0, sizeof(args));
924 rq.cmd_type = REQ_TYPE_PM_SUSPEND;
925 rq.special = &args;
926 rq.data = &rqpm;
927 rqpm.pm_step = ide_pm_state_start_suspend;
928 if (mesg.event == PM_EVENT_PRETHAW)
929 mesg.event = PM_EVENT_FREEZE;
930 rqpm.pm_state = mesg.event;
931
932 ret = ide_do_drive_cmd(drive, &rq, ide_wait);
933 /* only call ACPI _PS3 after both drivers are suspended */
934 if (!ret && (((drive->dn % 2) && hwif->drives[0].present
935 && hwif->drives[1].present)
936 || !hwif->drives[0].present
937 || !hwif->drives[1].present))
938 ide_acpi_set_state(hwif, 0);
939 return ret;
940 }
941
942 static int generic_ide_resume(struct device *dev)
943 {
944 ide_drive_t *drive = dev->driver_data;
945 ide_hwif_t *hwif = HWIF(drive);
946 struct request rq;
947 struct request_pm_state rqpm;
948 ide_task_t args;
949 int err;
950
951 /* Call ACPI _STM only once */
952 if (!(drive->dn % 2)) {
953 ide_acpi_set_state(hwif, 1);
954 ide_acpi_push_timing(hwif);
955 }
956
957 ide_acpi_exec_tfs(drive);
958
959 memset(&rq, 0, sizeof(rq));
960 memset(&rqpm, 0, sizeof(rqpm));
961 memset(&args, 0, sizeof(args));
962 rq.cmd_type = REQ_TYPE_PM_RESUME;
963 rq.special = &args;
964 rq.data = &rqpm;
965 rqpm.pm_step = ide_pm_state_start_resume;
966 rqpm.pm_state = PM_EVENT_ON;
967
968 err = ide_do_drive_cmd(drive, &rq, ide_head_wait);
969
970 if (err == 0 && dev->driver) {
971 ide_driver_t *drv = to_ide_driver(dev->driver);
972
973 if (drv->resume)
974 drv->resume(drive);
975 }
976
977 return err;
978 }
979
980 int generic_ide_ioctl(ide_drive_t *drive, struct file *file, struct block_device *bdev,
981 unsigned int cmd, unsigned long arg)
982 {
983 unsigned long flags;
984 ide_driver_t *drv;
985 void __user *p = (void __user *)arg;
986 int err = 0, (*setfunc)(ide_drive_t *, int);
987 u8 *val;
988
989 switch (cmd) {
990 case HDIO_GET_32BIT: val = &drive->io_32bit; goto read_val;
991 case HDIO_GET_KEEPSETTINGS: val = &drive->keep_settings; goto read_val;
992 case HDIO_GET_UNMASKINTR: val = &drive->unmask; goto read_val;
993 case HDIO_GET_DMA: val = &drive->using_dma; goto read_val;
994 case HDIO_SET_32BIT: setfunc = set_io_32bit; goto set_val;
995 case HDIO_SET_KEEPSETTINGS: setfunc = set_ksettings; goto set_val;
996 case HDIO_SET_PIO_MODE: setfunc = set_pio_mode; goto set_val;
997 case HDIO_SET_UNMASKINTR: setfunc = set_unmaskirq; goto set_val;
998 case HDIO_SET_DMA: setfunc = set_using_dma; goto set_val;
999 }
1000
1001 switch (cmd) {
1002 case HDIO_OBSOLETE_IDENTITY:
1003 case HDIO_GET_IDENTITY:
1004 if (bdev != bdev->bd_contains)
1005 return -EINVAL;
1006 if (drive->id_read == 0)
1007 return -ENOMSG;
1008 if (copy_to_user(p, drive->id, (cmd == HDIO_GET_IDENTITY) ? sizeof(*drive->id) : 142))
1009 return -EFAULT;
1010 return 0;
1011
1012 case HDIO_GET_NICE:
1013 return put_user(drive->dsc_overlap << IDE_NICE_DSC_OVERLAP |
1014 drive->atapi_overlap << IDE_NICE_ATAPI_OVERLAP |
1015 drive->nice0 << IDE_NICE_0 |
1016 drive->nice1 << IDE_NICE_1 |
1017 drive->nice2 << IDE_NICE_2,
1018 (long __user *) arg);
1019
1020 #ifdef CONFIG_IDE_TASK_IOCTL
1021 case HDIO_DRIVE_TASKFILE:
1022 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
1023 return -EACCES;
1024 switch(drive->media) {
1025 case ide_disk:
1026 return ide_taskfile_ioctl(drive, cmd, arg);
1027 default:
1028 return -ENOMSG;
1029 }
1030 #endif /* CONFIG_IDE_TASK_IOCTL */
1031
1032 case HDIO_DRIVE_CMD:
1033 if (!capable(CAP_SYS_RAWIO))
1034 return -EACCES;
1035 return ide_cmd_ioctl(drive, cmd, arg);
1036
1037 case HDIO_DRIVE_TASK:
1038 if (!capable(CAP_SYS_RAWIO))
1039 return -EACCES;
1040 return ide_task_ioctl(drive, cmd, arg);
1041
1042 case HDIO_SCAN_HWIF:
1043 {
1044 hw_regs_t hw;
1045 int args[3];
1046 if (!capable(CAP_SYS_RAWIO)) return -EACCES;
1047 if (copy_from_user(args, p, 3 * sizeof(int)))
1048 return -EFAULT;
1049 memset(&hw, 0, sizeof(hw));
1050 ide_init_hwif_ports(&hw, (unsigned long) args[0],
1051 (unsigned long) args[1], NULL);
1052 hw.irq = args[2];
1053 if (ide_register_hw(&hw, 0, NULL) == -1)
1054 return -EIO;
1055 return 0;
1056 }
1057 case HDIO_UNREGISTER_HWIF:
1058 if (!capable(CAP_SYS_RAWIO)) return -EACCES;
1059 /* (arg > MAX_HWIFS) checked in function */
1060 ide_unregister(arg);
1061 return 0;
1062 case HDIO_SET_NICE:
1063 if (!capable(CAP_SYS_ADMIN)) return -EACCES;
1064 if (arg != (arg & ((1 << IDE_NICE_DSC_OVERLAP) | (1 << IDE_NICE_1))))
1065 return -EPERM;
1066 drive->dsc_overlap = (arg >> IDE_NICE_DSC_OVERLAP) & 1;
1067 drv = *(ide_driver_t **)bdev->bd_disk->private_data;
1068 if (drive->dsc_overlap && !drv->supports_dsc_overlap) {
1069 drive->dsc_overlap = 0;
1070 return -EPERM;
1071 }
1072 drive->nice1 = (arg >> IDE_NICE_1) & 1;
1073 return 0;
1074 case HDIO_DRIVE_RESET:
1075 {
1076 unsigned long flags;
1077 if (!capable(CAP_SYS_ADMIN)) return -EACCES;
1078
1079 /*
1080 * Abort the current command on the
1081 * group if there is one, taking
1082 * care not to allow anything else
1083 * to be queued and to die on the
1084 * spot if we miss one somehow
1085 */
1086
1087 spin_lock_irqsave(&ide_lock, flags);
1088
1089 if (HWGROUP(drive)->resetting) {
1090 spin_unlock_irqrestore(&ide_lock, flags);
1091 return -EBUSY;
1092 }
1093
1094 ide_abort(drive, "drive reset");
1095
1096 BUG_ON(HWGROUP(drive)->handler);
1097
1098 /* Ensure nothing gets queued after we
1099 drop the lock. Reset will clear the busy */
1100
1101 HWGROUP(drive)->busy = 1;
1102 spin_unlock_irqrestore(&ide_lock, flags);
1103 (void) ide_do_reset(drive);
1104
1105 return 0;
1106 }
1107
1108 case HDIO_GET_BUSSTATE:
1109 if (!capable(CAP_SYS_ADMIN))
1110 return -EACCES;
1111 if (put_user(HWIF(drive)->bus_state, (long __user *)arg))
1112 return -EFAULT;
1113 return 0;
1114
1115 case HDIO_SET_BUSSTATE:
1116 if (!capable(CAP_SYS_ADMIN))
1117 return -EACCES;
1118 if (HWIF(drive)->busproc)
1119 return HWIF(drive)->busproc(drive, (int)arg);
1120 return -EOPNOTSUPP;
1121 default:
1122 return -EINVAL;
1123 }
1124
1125 read_val:
1126 mutex_lock(&ide_setting_mtx);
1127 spin_lock_irqsave(&ide_lock, flags);
1128 err = *val;
1129 spin_unlock_irqrestore(&ide_lock, flags);
1130 mutex_unlock(&ide_setting_mtx);
1131 return err >= 0 ? put_user(err, (long __user *)arg) : err;
1132
1133 set_val:
1134 if (bdev != bdev->bd_contains)
1135 err = -EINVAL;
1136 else {
1137 if (!capable(CAP_SYS_ADMIN))
1138 err = -EACCES;
1139 else {
1140 mutex_lock(&ide_setting_mtx);
1141 err = setfunc(drive, arg);
1142 mutex_unlock(&ide_setting_mtx);
1143 }
1144 }
1145 return err;
1146 }
1147
1148 EXPORT_SYMBOL(generic_ide_ioctl);
1149
1150 /*
1151 * stridx() returns the offset of c within s,
1152 * or -1 if c is '\0' or not found within s.
1153 */
1154 static int __init stridx (const char *s, char c)
1155 {
1156 char *i = strchr(s, c);
1157 return (i && c) ? i - s : -1;
1158 }
1159
1160 /*
1161 * match_parm() does parsing for ide_setup():
1162 *
1163 * 1. the first char of s must be '='.
1164 * 2. if the remainder matches one of the supplied keywords,
1165 * the index (1 based) of the keyword is negated and returned.
1166 * 3. if the remainder is a series of no more than max_vals numbers
1167 * separated by commas, the numbers are saved in vals[] and a
1168 * count of how many were saved is returned. Base10 is assumed,
1169 * and base16 is allowed when prefixed with "0x".
1170 * 4. otherwise, zero is returned.
1171 */
1172 static int __init match_parm (char *s, const char *keywords[], int vals[], int max_vals)
1173 {
1174 static const char *decimal = "0123456789";
1175 static const char *hex = "0123456789abcdef";
1176 int i, n;
1177
1178 if (*s++ == '=') {
1179 /*
1180 * Try matching against the supplied keywords,
1181 * and return -(index+1) if we match one
1182 */
1183 if (keywords != NULL) {
1184 for (i = 0; *keywords != NULL; ++i) {
1185 if (!strcmp(s, *keywords++))
1186 return -(i+1);
1187 }
1188 }
1189 /*
1190 * Look for a series of no more than "max_vals"
1191 * numeric values separated by commas, in base10,
1192 * or base16 when prefixed with "0x".
1193 * Return a count of how many were found.
1194 */
1195 for (n = 0; (i = stridx(decimal, *s)) >= 0;) {
1196 vals[n] = i;
1197 while ((i = stridx(decimal, *++s)) >= 0)
1198 vals[n] = (vals[n] * 10) + i;
1199 if (*s == 'x' && !vals[n]) {
1200 while ((i = stridx(hex, *++s)) >= 0)
1201 vals[n] = (vals[n] * 0x10) + i;
1202 }
1203 if (++n == max_vals)
1204 break;
1205 if (*s == ',' || *s == ';')
1206 ++s;
1207 }
1208 if (!*s)
1209 return n;
1210 }
1211 return 0; /* zero = nothing matched */
1212 }
1213
1214 #ifdef CONFIG_BLK_DEV_ALI14XX
1215 extern int probe_ali14xx;
1216 extern int ali14xx_init(void);
1217 #endif
1218 #ifdef CONFIG_BLK_DEV_UMC8672
1219 extern int probe_umc8672;
1220 extern int umc8672_init(void);
1221 #endif
1222 #ifdef CONFIG_BLK_DEV_DTC2278
1223 extern int probe_dtc2278;
1224 extern int dtc2278_init(void);
1225 #endif
1226 #ifdef CONFIG_BLK_DEV_HT6560B
1227 extern int probe_ht6560b;
1228 extern int ht6560b_init(void);
1229 #endif
1230 #ifdef CONFIG_BLK_DEV_QD65XX
1231 extern int probe_qd65xx;
1232 extern int qd65xx_init(void);
1233 #endif
1234
1235 static int __initdata is_chipset_set[MAX_HWIFS];
1236
1237 /*
1238 * ide_setup() gets called VERY EARLY during initialization,
1239 * to handle kernel "command line" strings beginning with "hdx=" or "ide".
1240 *
1241 * Remember to update Documentation/ide.txt if you change something here.
1242 */
1243 static int __init ide_setup(char *s)
1244 {
1245 int i, vals[3];
1246 ide_hwif_t *hwif;
1247 ide_drive_t *drive;
1248 unsigned int hw, unit;
1249 const char max_drive = 'a' + ((MAX_HWIFS * MAX_DRIVES) - 1);
1250 const char max_hwif = '0' + (MAX_HWIFS - 1);
1251
1252
1253 if (strncmp(s,"hd",2) == 0 && s[2] == '=') /* hd= is for hd.c */
1254 return 0; /* driver and not us */
1255
1256 if (strncmp(s,"ide",3) && strncmp(s,"idebus",6) && strncmp(s,"hd",2))
1257 return 0;
1258
1259 printk(KERN_INFO "ide_setup: %s", s);
1260 init_ide_data ();
1261
1262 #ifdef CONFIG_BLK_DEV_IDEDOUBLER
1263 if (!strcmp(s, "ide=doubler")) {
1264 extern int ide_doubler;
1265
1266 printk(" : Enabled support for IDE doublers\n");
1267 ide_doubler = 1;
1268 return 1;
1269 }
1270 #endif /* CONFIG_BLK_DEV_IDEDOUBLER */
1271
1272 if (!strcmp(s, "ide=nodma")) {
1273 printk(" : Prevented DMA\n");
1274 noautodma = 1;
1275 goto obsolete_option;
1276 }
1277
1278 #ifdef CONFIG_IDEPCI_PCIBUS_ORDER
1279 if (!strcmp(s, "ide=reverse")) {
1280 ide_scan_direction = 1;
1281 printk(" : Enabled support for IDE inverse scan order.\n");
1282 return 1;
1283 }
1284 #endif
1285
1286 #ifdef CONFIG_BLK_DEV_IDEACPI
1287 if (!strcmp(s, "ide=noacpi")) {
1288 //printk(" : Disable IDE ACPI support.\n");
1289 ide_noacpi = 1;
1290 return 1;
1291 }
1292 if (!strcmp(s, "ide=acpigtf")) {
1293 //printk(" : Enable IDE ACPI _GTF support.\n");
1294 ide_noacpitfs = 0;
1295 return 1;
1296 }
1297 if (!strcmp(s, "ide=acpionboot")) {
1298 //printk(" : Call IDE ACPI methods on boot.\n");
1299 ide_noacpionboot = 0;
1300 return 1;
1301 }
1302 #endif /* CONFIG_BLK_DEV_IDEACPI */
1303
1304 /*
1305 * Look for drive options: "hdx="
1306 */
1307 if (s[0] == 'h' && s[1] == 'd' && s[2] >= 'a' && s[2] <= max_drive) {
1308 const char *hd_words[] = {
1309 "none", "noprobe", "nowerr", "cdrom", "nodma",
1310 "autotune", "noautotune", "minus8", "swapdata", "bswap",
1311 "noflush", "remap", "remap63", "scsi", NULL };
1312 unit = s[2] - 'a';
1313 hw = unit / MAX_DRIVES;
1314 unit = unit % MAX_DRIVES;
1315 hwif = &ide_hwifs[hw];
1316 drive = &hwif->drives[unit];
1317 if (strncmp(s + 4, "ide-", 4) == 0) {
1318 strlcpy(drive->driver_req, s + 4, sizeof(drive->driver_req));
1319 goto done;
1320 }
1321 switch (match_parm(&s[3], hd_words, vals, 3)) {
1322 case -1: /* "none" */
1323 case -2: /* "noprobe" */
1324 drive->noprobe = 1;
1325 goto done;
1326 case -3: /* "nowerr" */
1327 drive->bad_wstat = BAD_R_STAT;
1328 hwif->noprobe = 0;
1329 goto done;
1330 case -4: /* "cdrom" */
1331 drive->present = 1;
1332 drive->media = ide_cdrom;
1333 /* an ATAPI device ignores DRDY */
1334 drive->ready_stat = 0;
1335 hwif->noprobe = 0;
1336 goto done;
1337 case -5: /* nodma */
1338 drive->nodma = 1;
1339 goto done;
1340 case -6: /* "autotune" */
1341 drive->autotune = IDE_TUNE_AUTO;
1342 goto obsolete_option;
1343 case -7: /* "noautotune" */
1344 drive->autotune = IDE_TUNE_NOAUTO;
1345 goto obsolete_option;
1346 case -9: /* "swapdata" */
1347 case -10: /* "bswap" */
1348 drive->bswap = 1;
1349 goto done;
1350 case -11: /* noflush */
1351 drive->noflush = 1;
1352 goto done;
1353 case -12: /* "remap" */
1354 drive->remap_0_to_1 = 1;
1355 goto done;
1356 case -13: /* "remap63" */
1357 drive->sect0 = 63;
1358 goto done;
1359 case -14: /* "scsi" */
1360 drive->scsi = 1;
1361 goto done;
1362 case 3: /* cyl,head,sect */
1363 drive->media = ide_disk;
1364 drive->ready_stat = READY_STAT;
1365 drive->cyl = drive->bios_cyl = vals[0];
1366 drive->head = drive->bios_head = vals[1];
1367 drive->sect = drive->bios_sect = vals[2];
1368 drive->present = 1;
1369 drive->forced_geom = 1;
1370 hwif->noprobe = 0;
1371 goto done;
1372 default:
1373 goto bad_option;
1374 }
1375 }
1376
1377 if (s[0] != 'i' || s[1] != 'd' || s[2] != 'e')
1378 goto bad_option;
1379 /*
1380 * Look for bus speed option: "idebus="
1381 */
1382 if (s[3] == 'b' && s[4] == 'u' && s[5] == 's') {
1383 if (match_parm(&s[6], NULL, vals, 1) != 1)
1384 goto bad_option;
1385 if (vals[0] >= 20 && vals[0] <= 66) {
1386 idebus_parameter = vals[0];
1387 } else
1388 printk(" -- BAD BUS SPEED! Expected value from 20 to 66");
1389 goto done;
1390 }
1391 /*
1392 * Look for interface options: "idex="
1393 */
1394 if (s[3] >= '0' && s[3] <= max_hwif) {
1395 /*
1396 * Be VERY CAREFUL changing this: note hardcoded indexes below
1397 * (-8, -9, -10) are reserved to ease the hardcoding.
1398 */
1399 static const char *ide_words[] = {
1400 "noprobe", "serialize", "minus3", "minus4",
1401 "reset", "minus6", "ata66", "minus8", "minus9",
1402 "minus10", "four", "qd65xx", "ht6560b", "cmd640_vlb",
1403 "dtc2278", "umc8672", "ali14xx", NULL };
1404 hw = s[3] - '0';
1405 hwif = &ide_hwifs[hw];
1406 i = match_parm(&s[4], ide_words, vals, 3);
1407
1408 /*
1409 * Cryptic check to ensure chipset not already set for hwif.
1410 * Note: we can't depend on hwif->chipset here.
1411 */
1412 if ((i >= -18 && i <= -11) || (i > 0 && i <= 3)) {
1413 /* chipset already specified */
1414 if (is_chipset_set[hw])
1415 goto bad_option;
1416 if (i > -18 && i <= -11) {
1417 /* these drivers are for "ide0=" only */
1418 if (hw != 0)
1419 goto bad_hwif;
1420 /* chipset already specified for 2nd port */
1421 if (is_chipset_set[hw+1])
1422 goto bad_option;
1423 }
1424 is_chipset_set[hw] = 1;
1425 printk("\n");
1426 }
1427
1428 switch (i) {
1429 #ifdef CONFIG_BLK_DEV_ALI14XX
1430 case -17: /* "ali14xx" */
1431 probe_ali14xx = 1;
1432 goto done;
1433 #endif
1434 #ifdef CONFIG_BLK_DEV_UMC8672
1435 case -16: /* "umc8672" */
1436 probe_umc8672 = 1;
1437 goto done;
1438 #endif
1439 #ifdef CONFIG_BLK_DEV_DTC2278
1440 case -15: /* "dtc2278" */
1441 probe_dtc2278 = 1;
1442 goto done;
1443 #endif
1444 #ifdef CONFIG_BLK_DEV_CMD640
1445 case -14: /* "cmd640_vlb" */
1446 {
1447 extern int cmd640_vlb; /* flag for cmd640.c */
1448 cmd640_vlb = 1;
1449 goto done;
1450 }
1451 #endif
1452 #ifdef CONFIG_BLK_DEV_HT6560B
1453 case -13: /* "ht6560b" */
1454 probe_ht6560b = 1;
1455 goto done;
1456 #endif
1457 #ifdef CONFIG_BLK_DEV_QD65XX
1458 case -12: /* "qd65xx" */
1459 probe_qd65xx = 1;
1460 goto done;
1461 #endif
1462 #ifdef CONFIG_BLK_DEV_4DRIVES
1463 case -11: /* "four" drives on one set of ports */
1464 {
1465 ide_hwif_t *mate = &ide_hwifs[hw^1];
1466 mate->drives[0].select.all ^= 0x20;
1467 mate->drives[1].select.all ^= 0x20;
1468 hwif->chipset = mate->chipset = ide_4drives;
1469 mate->irq = hwif->irq;
1470 memcpy(mate->io_ports, hwif->io_ports, sizeof(hwif->io_ports));
1471 hwif->mate = mate;
1472 mate->mate = hwif;
1473 hwif->serialized = mate->serialized = 1;
1474 goto obsolete_option;
1475 }
1476 #endif /* CONFIG_BLK_DEV_4DRIVES */
1477 case -10: /* minus10 */
1478 case -9: /* minus9 */
1479 case -8: /* minus8 */
1480 case -6:
1481 case -4:
1482 case -3:
1483 goto bad_option;
1484 case -7: /* ata66 */
1485 #ifdef CONFIG_BLK_DEV_IDEPCI
1486 /*
1487 * Use ATA_CBL_PATA40_SHORT so drive side
1488 * cable detection is also overriden.
1489 */
1490 hwif->cbl = ATA_CBL_PATA40_SHORT;
1491 goto obsolete_option;
1492 #else
1493 goto bad_hwif;
1494 #endif
1495 case -5: /* "reset" */
1496 hwif->reset = 1;
1497 goto obsolete_option;
1498 case -2: /* "serialize" */
1499 hwif->mate = &ide_hwifs[hw^1];
1500 hwif->mate->mate = hwif;
1501 hwif->serialized = hwif->mate->serialized = 1;
1502 goto obsolete_option;
1503
1504 case -1: /* "noprobe" */
1505 hwif->noprobe = 1;
1506 goto done;
1507
1508 case 1: /* base */
1509 vals[1] = vals[0] + 0x206; /* default ctl */
1510 case 2: /* base,ctl */
1511 vals[2] = 0; /* default irq = probe for it */
1512 case 3: /* base,ctl,irq */
1513 hwif->hw.irq = vals[2];
1514 ide_init_hwif_ports(&hwif->hw, (unsigned long) vals[0], (unsigned long) vals[1], &hwif->irq);
1515 memcpy(hwif->io_ports, hwif->hw.io_ports, sizeof(hwif->io_ports));
1516 hwif->irq = vals[2];
1517 hwif->noprobe = 0;
1518 hwif->chipset = ide_forced;
1519 goto obsolete_option;
1520
1521 case 0: goto bad_option;
1522 default:
1523 printk(" -- SUPPORT NOT CONFIGURED IN THIS KERNEL\n");
1524 return 1;
1525 }
1526 }
1527 bad_option:
1528 printk(" -- BAD OPTION\n");
1529 return 1;
1530 obsolete_option:
1531 printk(" -- OBSOLETE OPTION, WILL BE REMOVED SOON!\n");
1532 return 1;
1533 bad_hwif:
1534 printk("-- NOT SUPPORTED ON ide%d", hw);
1535 done:
1536 printk("\n");
1537 return 1;
1538 }
1539
1540 extern void __init pnpide_init(void);
1541 extern void __exit pnpide_exit(void);
1542 extern void __init h8300_ide_init(void);
1543
1544 /*
1545 * probe_for_hwifs() finds/initializes "known" IDE interfaces
1546 */
1547 static void __init probe_for_hwifs (void)
1548 {
1549 #ifdef CONFIG_IDEPCI_PCIBUS_ORDER
1550 ide_scan_pcibus(ide_scan_direction);
1551 #endif
1552
1553 #ifdef CONFIG_ETRAX_IDE
1554 {
1555 extern void init_e100_ide(void);
1556 init_e100_ide();
1557 }
1558 #endif /* CONFIG_ETRAX_IDE */
1559 #ifdef CONFIG_BLK_DEV_CMD640
1560 {
1561 extern void ide_probe_for_cmd640x(void);
1562 ide_probe_for_cmd640x();
1563 }
1564 #endif /* CONFIG_BLK_DEV_CMD640 */
1565 #ifdef CONFIG_BLK_DEV_IDE_PMAC
1566 {
1567 extern int pmac_ide_probe(void);
1568 (void)pmac_ide_probe();
1569 }
1570 #endif /* CONFIG_BLK_DEV_IDE_PMAC */
1571 #ifdef CONFIG_BLK_DEV_GAYLE
1572 {
1573 extern void gayle_init(void);
1574 gayle_init();
1575 }
1576 #endif /* CONFIG_BLK_DEV_GAYLE */
1577 #ifdef CONFIG_BLK_DEV_FALCON_IDE
1578 {
1579 extern void falconide_init(void);
1580 falconide_init();
1581 }
1582 #endif /* CONFIG_BLK_DEV_FALCON_IDE */
1583 #ifdef CONFIG_BLK_DEV_MAC_IDE
1584 {
1585 extern void macide_init(void);
1586 macide_init();
1587 }
1588 #endif /* CONFIG_BLK_DEV_MAC_IDE */
1589 #ifdef CONFIG_BLK_DEV_Q40IDE
1590 {
1591 extern void q40ide_init(void);
1592 q40ide_init();
1593 }
1594 #endif /* CONFIG_BLK_DEV_Q40IDE */
1595 #ifdef CONFIG_BLK_DEV_BUDDHA
1596 {
1597 extern void buddha_init(void);
1598 buddha_init();
1599 }
1600 #endif /* CONFIG_BLK_DEV_BUDDHA */
1601 #ifdef CONFIG_BLK_DEV_IDEPNP
1602 pnpide_init();
1603 #endif
1604 #ifdef CONFIG_H8300
1605 h8300_ide_init();
1606 #endif
1607 }
1608
1609 /*
1610 * Probe module
1611 */
1612
1613 EXPORT_SYMBOL(ide_lock);
1614
1615 static int ide_bus_match(struct device *dev, struct device_driver *drv)
1616 {
1617 return 1;
1618 }
1619
1620 static char *media_string(ide_drive_t *drive)
1621 {
1622 switch (drive->media) {
1623 case ide_disk:
1624 return "disk";
1625 case ide_cdrom:
1626 return "cdrom";
1627 case ide_tape:
1628 return "tape";
1629 case ide_floppy:
1630 return "floppy";
1631 case ide_optical:
1632 return "optical";
1633 default:
1634 return "UNKNOWN";
1635 }
1636 }
1637
1638 static ssize_t media_show(struct device *dev, struct device_attribute *attr, char *buf)
1639 {
1640 ide_drive_t *drive = to_ide_device(dev);
1641 return sprintf(buf, "%s\n", media_string(drive));
1642 }
1643
1644 static ssize_t drivename_show(struct device *dev, struct device_attribute *attr, char *buf)
1645 {
1646 ide_drive_t *drive = to_ide_device(dev);
1647 return sprintf(buf, "%s\n", drive->name);
1648 }
1649
1650 static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf)
1651 {
1652 ide_drive_t *drive = to_ide_device(dev);
1653 return sprintf(buf, "ide:m-%s\n", media_string(drive));
1654 }
1655
1656 static struct device_attribute ide_dev_attrs[] = {
1657 __ATTR_RO(media),
1658 __ATTR_RO(drivename),
1659 __ATTR_RO(modalias),
1660 __ATTR_NULL
1661 };
1662
1663 static int ide_uevent(struct device *dev, struct kobj_uevent_env *env)
1664 {
1665 ide_drive_t *drive = to_ide_device(dev);
1666
1667 add_uevent_var(env, "MEDIA=%s", media_string(drive));
1668 add_uevent_var(env, "DRIVENAME=%s", drive->name);
1669 add_uevent_var(env, "MODALIAS=ide:m-%s", media_string(drive));
1670 return 0;
1671 }
1672
1673 static int generic_ide_probe(struct device *dev)
1674 {
1675 ide_drive_t *drive = to_ide_device(dev);
1676 ide_driver_t *drv = to_ide_driver(dev->driver);
1677
1678 return drv->probe ? drv->probe(drive) : -ENODEV;
1679 }
1680
1681 static int generic_ide_remove(struct device *dev)
1682 {
1683 ide_drive_t *drive = to_ide_device(dev);
1684 ide_driver_t *drv = to_ide_driver(dev->driver);
1685
1686 if (drv->remove)
1687 drv->remove(drive);
1688
1689 return 0;
1690 }
1691
1692 static void generic_ide_shutdown(struct device *dev)
1693 {
1694 ide_drive_t *drive = to_ide_device(dev);
1695 ide_driver_t *drv = to_ide_driver(dev->driver);
1696
1697 if (dev->driver && drv->shutdown)
1698 drv->shutdown(drive);
1699 }
1700
1701 struct bus_type ide_bus_type = {
1702 .name = "ide",
1703 .match = ide_bus_match,
1704 .uevent = ide_uevent,
1705 .probe = generic_ide_probe,
1706 .remove = generic_ide_remove,
1707 .shutdown = generic_ide_shutdown,
1708 .dev_attrs = ide_dev_attrs,
1709 .suspend = generic_ide_suspend,
1710 .resume = generic_ide_resume,
1711 };
1712
1713 EXPORT_SYMBOL_GPL(ide_bus_type);
1714
1715 /*
1716 * This is gets invoked once during initialization, to set *everything* up
1717 */
1718 static int __init ide_init(void)
1719 {
1720 int ret;
1721
1722 printk(KERN_INFO "Uniform Multi-Platform E-IDE driver " REVISION "\n");
1723 system_bus_speed = ide_system_bus_speed();
1724
1725 ret = bus_register(&ide_bus_type);
1726 if (ret < 0) {
1727 printk(KERN_WARNING "IDE: bus_register error: %d\n", ret);
1728 return ret;
1729 }
1730
1731 init_ide_data();
1732
1733 proc_ide_create();
1734
1735 #ifdef CONFIG_BLK_DEV_ALI14XX
1736 if (probe_ali14xx)
1737 (void)ali14xx_init();
1738 #endif
1739 #ifdef CONFIG_BLK_DEV_UMC8672
1740 if (probe_umc8672)
1741 (void)umc8672_init();
1742 #endif
1743 #ifdef CONFIG_BLK_DEV_DTC2278
1744 if (probe_dtc2278)
1745 (void)dtc2278_init();
1746 #endif
1747 #ifdef CONFIG_BLK_DEV_HT6560B
1748 if (probe_ht6560b)
1749 (void)ht6560b_init();
1750 #endif
1751 #ifdef CONFIG_BLK_DEV_QD65XX
1752 if (probe_qd65xx)
1753 (void)qd65xx_init();
1754 #endif
1755
1756 /* Probe for special PCI and other "known" interface chipsets. */
1757 probe_for_hwifs();
1758
1759 return 0;
1760 }
1761
1762 #ifdef MODULE
1763 static char *options = NULL;
1764 module_param(options, charp, 0);
1765 MODULE_LICENSE("GPL");
1766
1767 static void __init parse_options (char *line)
1768 {
1769 char *next = line;
1770
1771 if (line == NULL || !*line)
1772 return;
1773 while ((line = next) != NULL) {
1774 if ((next = strchr(line,' ')) != NULL)
1775 *next++ = 0;
1776 if (!ide_setup(line))
1777 printk (KERN_INFO "Unknown option '%s'\n", line);
1778 }
1779 }
1780
1781 int __init init_module (void)
1782 {
1783 parse_options(options);
1784 return ide_init();
1785 }
1786
1787 void __exit cleanup_module (void)
1788 {
1789 int index;
1790
1791 for (index = 0; index < MAX_HWIFS; ++index)
1792 ide_unregister(index);
1793
1794 #ifdef CONFIG_BLK_DEV_IDEPNP
1795 pnpide_exit();
1796 #endif
1797
1798 proc_ide_destroy();
1799
1800 bus_unregister(&ide_bus_type);
1801 }
1802
1803 #else /* !MODULE */
1804
1805 __setup("", ide_setup);
1806
1807 module_init(ide_init);
1808
1809 #endif /* MODULE */
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree