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V4L/DVB (6665b): add ivtv to MAINTAINERS
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / ide / ide.c
blob54943da6e4e5cfa45c80ac73a86f6c9de3a10769
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 init_completion(&hwif->gendev_rel_comp);
138
139 default_hwif_iops(hwif);
140 default_hwif_transport(hwif);
141 for (unit = 0; unit < MAX_DRIVES; ++unit) {
142 ide_drive_t *drive = &hwif->drives[unit];
143
144 drive->media = ide_disk;
145 drive->select.all = (unit<<4)|0xa0;
146 drive->hwif = hwif;
147 drive->ctl = 0x08;
148 drive->ready_stat = READY_STAT;
149 drive->bad_wstat = BAD_W_STAT;
150 drive->special.b.recalibrate = 1;
151 drive->special.b.set_geometry = 1;
152 drive->name[0] = 'h';
153 drive->name[1] = 'd';
154 drive->name[2] = 'a' + (index * MAX_DRIVES) + unit;
155 drive->max_failures = IDE_DEFAULT_MAX_FAILURES;
156 drive->using_dma = 0;
157 drive->vdma = 0;
158 INIT_LIST_HEAD(&drive->list);
159 init_completion(&drive->gendev_rel_comp);
160 }
161 }
162
163 static void init_hwif_default(ide_hwif_t *hwif, unsigned int index)
164 {
165 hw_regs_t hw;
166
167 memset(&hw, 0, sizeof(hw_regs_t));
168
169 ide_init_hwif_ports(&hw, ide_default_io_base(index), 0, &hwif->irq);
170
171 memcpy(hwif->io_ports, hw.io_ports, sizeof(hw.io_ports));
172
173 hwif->noprobe = !hwif->io_ports[IDE_DATA_OFFSET];
174 #ifdef CONFIG_BLK_DEV_HD
175 if (hwif->io_ports[IDE_DATA_OFFSET] == HD_DATA)
176 hwif->noprobe = 1; /* may be overridden by ide_setup() */
177 #endif
178 }
179
180 extern void ide_arm_init(void);
181
182 /*
183 * init_ide_data() sets reasonable default values into all fields
184 * of all instances of the hwifs and drives, but only on the first call.
185 * Subsequent calls have no effect (they don't wipe out anything).
186 *
187 * This routine is normally called at driver initialization time,
188 * but may also be called MUCH earlier during kernel "command-line"
189 * parameter processing. As such, we cannot depend on any other parts
190 * of the kernel (such as memory allocation) to be functioning yet.
191 *
192 * This is too bad, as otherwise we could dynamically allocate the
193 * ide_drive_t structs as needed, rather than always consuming memory
194 * for the max possible number (MAX_HWIFS * MAX_DRIVES) of them.
195 *
196 * FIXME: We should stuff the setup data into __init and copy the
197 * relevant hwifs/allocate them properly during boot.
198 */
199 #define MAGIC_COOKIE 0x12345678
200 static void __init init_ide_data (void)
201 {
202 ide_hwif_t *hwif;
203 unsigned int index;
204 static unsigned long magic_cookie = MAGIC_COOKIE;
205
206 if (magic_cookie != MAGIC_COOKIE)
207 return; /* already initialized */
208 magic_cookie = 0;
209
210 /* Initialise all interface structures */
211 for (index = 0; index < MAX_HWIFS; ++index) {
212 hwif = &ide_hwifs[index];
213 init_hwif_data(hwif, index);
214 init_hwif_default(hwif, index);
215 #if !defined(CONFIG_PPC32) || !defined(CONFIG_PCI)
216 hwif->irq =
217 ide_init_default_irq(hwif->io_ports[IDE_DATA_OFFSET]);
218 #endif
219 }
220 #ifdef CONFIG_IDE_ARM
221 ide_arm_init();
222 #endif
223 }
224
225 /**
226 * ide_system_bus_speed - guess bus speed
227 *
228 * ide_system_bus_speed() returns what we think is the system VESA/PCI
229 * bus speed (in MHz). This is used for calculating interface PIO timings.
230 * The default is 40 for known PCI systems, 50 otherwise.
231 * The "idebus=xx" parameter can be used to override this value.
232 * The actual value to be used is computed/displayed the first time
233 * through. Drivers should only use this as a last resort.
234 *
235 * Returns a guessed speed in MHz.
236 */
237
238 static int ide_system_bus_speed(void)
239 {
240 #ifdef CONFIG_PCI
241 static struct pci_device_id pci_default[] = {
242 { PCI_DEVICE(PCI_ANY_ID, PCI_ANY_ID) },
243 { }
244 };
245 #else
246 #define pci_default 0
247 #endif /* CONFIG_PCI */
248
249 if (!system_bus_speed) {
250 if (idebus_parameter) {
251 /* user supplied value */
252 system_bus_speed = idebus_parameter;
253 } else if (pci_dev_present(pci_default)) {
254 /* safe default value for PCI */
255 system_bus_speed = 33;
256 } else {
257 /* safe default value for VESA and PCI */
258 system_bus_speed = 50;
259 }
260 printk(KERN_INFO "ide: Assuming %dMHz system bus speed "
261 "for PIO modes%s\n", system_bus_speed,
262 idebus_parameter ? "" : "; override with idebus=xx");
263 }
264 return system_bus_speed;
265 }
266
267 ide_hwif_t * ide_find_port(unsigned long base)
268 {
269 ide_hwif_t *hwif;
270 int i;
271
272 for (i = 0; i < MAX_HWIFS; i++) {
273 hwif = &ide_hwifs[i];
274 if (hwif->io_ports[IDE_DATA_OFFSET] == base)
275 goto found;
276 }
277
278 for (i = 0; i < MAX_HWIFS; i++) {
279 hwif = &ide_hwifs[i];
280 if (hwif->io_ports[IDE_DATA_OFFSET] == 0)
281 goto found;
282 }
283
284 hwif = NULL;
285 found:
286 return hwif;
287 }
288
289 EXPORT_SYMBOL_GPL(ide_find_port);
290
291 static struct resource* hwif_request_region(ide_hwif_t *hwif,
292 unsigned long addr, int num)
293 {
294 struct resource *res = request_region(addr, num, hwif->name);
295
296 if (!res)
297 printk(KERN_ERR "%s: I/O resource 0x%lX-0x%lX not free.\n",
298 hwif->name, addr, addr+num-1);
299 return res;
300 }
301
302 /**
303 * ide_hwif_request_regions - request resources for IDE
304 * @hwif: interface to use
305 *
306 * Requests all the needed resources for an interface.
307 * Right now core IDE code does this work which is deeply wrong.
308 * MMIO leaves it to the controller driver,
309 * PIO will migrate this way over time.
310 */
311
312 int ide_hwif_request_regions(ide_hwif_t *hwif)
313 {
314 unsigned long addr;
315 unsigned int i;
316
317 if (hwif->mmio)
318 return 0;
319 addr = hwif->io_ports[IDE_CONTROL_OFFSET];
320 if (addr && !hwif_request_region(hwif, addr, 1))
321 goto control_region_busy;
322 hwif->straight8 = 0;
323 addr = hwif->io_ports[IDE_DATA_OFFSET];
324 if ((addr | 7) == hwif->io_ports[IDE_STATUS_OFFSET]) {
325 if (!hwif_request_region(hwif, addr, 8))
326 goto data_region_busy;
327 hwif->straight8 = 1;
328 return 0;
329 }
330 for (i = IDE_DATA_OFFSET; i <= IDE_STATUS_OFFSET; i++) {
331 addr = hwif->io_ports[i];
332 if (!hwif_request_region(hwif, addr, 1)) {
333 while (--i)
334 release_region(addr, 1);
335 goto data_region_busy;
336 }
337 }
338 return 0;
339
340 data_region_busy:
341 addr = hwif->io_ports[IDE_CONTROL_OFFSET];
342 if (addr)
343 release_region(addr, 1);
344 control_region_busy:
345 /* If any errors are return, we drop the hwif interface. */
346 return -EBUSY;
347 }
348
349 /**
350 * ide_hwif_release_regions - free IDE resources
351 *
352 * Note that we only release the standard ports,
353 * and do not even try to handle any extra ports
354 * allocated for weird IDE interface chipsets.
355 *
356 * Note also that we don't yet handle mmio resources here. More
357 * importantly our caller should be doing this so we need to
358 * restructure this as a helper function for drivers.
359 */
360
361 void ide_hwif_release_regions(ide_hwif_t *hwif)
362 {
363 u32 i = 0;
364
365 if (hwif->mmio)
366 return;
367 if (hwif->io_ports[IDE_CONTROL_OFFSET])
368 release_region(hwif->io_ports[IDE_CONTROL_OFFSET], 1);
369 if (hwif->straight8) {
370 release_region(hwif->io_ports[IDE_DATA_OFFSET], 8);
371 return;
372 }
373 for (i = IDE_DATA_OFFSET; i <= IDE_STATUS_OFFSET; i++)
374 if (hwif->io_ports[i])
375 release_region(hwif->io_ports[i], 1);
376 }
377
378 /**
379 * ide_hwif_restore - restore hwif to template
380 * @hwif: hwif to update
381 * @tmp_hwif: template
382 *
383 * Restore hwif to a previous state by copying most settings
384 * from the template.
385 */
386
387 static void ide_hwif_restore(ide_hwif_t *hwif, ide_hwif_t *tmp_hwif)
388 {
389 hwif->hwgroup = tmp_hwif->hwgroup;
390
391 hwif->gendev.parent = tmp_hwif->gendev.parent;
392
393 hwif->proc = tmp_hwif->proc;
394
395 hwif->major = tmp_hwif->major;
396 hwif->straight8 = tmp_hwif->straight8;
397 hwif->bus_state = tmp_hwif->bus_state;
398
399 hwif->host_flags = tmp_hwif->host_flags;
400
401 hwif->pio_mask = tmp_hwif->pio_mask;
402
403 hwif->ultra_mask = tmp_hwif->ultra_mask;
404 hwif->mwdma_mask = tmp_hwif->mwdma_mask;
405 hwif->swdma_mask = tmp_hwif->swdma_mask;
406
407 hwif->cbl = tmp_hwif->cbl;
408
409 hwif->chipset = tmp_hwif->chipset;
410 hwif->hold = tmp_hwif->hold;
411
412 #ifdef CONFIG_BLK_DEV_IDEPCI
413 hwif->pci_dev = tmp_hwif->pci_dev;
414 hwif->cds = tmp_hwif->cds;
415 #endif
416
417 hwif->fixup = tmp_hwif->fixup;
418
419 hwif->set_pio_mode = tmp_hwif->set_pio_mode;
420 hwif->set_dma_mode = tmp_hwif->set_dma_mode;
421 hwif->mdma_filter = tmp_hwif->mdma_filter;
422 hwif->udma_filter = tmp_hwif->udma_filter;
423 hwif->selectproc = tmp_hwif->selectproc;
424 hwif->reset_poll = tmp_hwif->reset_poll;
425 hwif->pre_reset = tmp_hwif->pre_reset;
426 hwif->resetproc = tmp_hwif->resetproc;
427 hwif->intrproc = tmp_hwif->intrproc;
428 hwif->maskproc = tmp_hwif->maskproc;
429 hwif->quirkproc = tmp_hwif->quirkproc;
430 hwif->busproc = tmp_hwif->busproc;
431
432 hwif->ata_input_data = tmp_hwif->ata_input_data;
433 hwif->ata_output_data = tmp_hwif->ata_output_data;
434 hwif->atapi_input_bytes = tmp_hwif->atapi_input_bytes;
435 hwif->atapi_output_bytes = tmp_hwif->atapi_output_bytes;
436
437 hwif->dma_setup = tmp_hwif->dma_setup;
438 hwif->dma_exec_cmd = tmp_hwif->dma_exec_cmd;
439 hwif->dma_start = tmp_hwif->dma_start;
440 hwif->ide_dma_end = tmp_hwif->ide_dma_end;
441 hwif->ide_dma_on = tmp_hwif->ide_dma_on;
442 hwif->dma_off_quietly = tmp_hwif->dma_off_quietly;
443 hwif->ide_dma_test_irq = tmp_hwif->ide_dma_test_irq;
444 hwif->ide_dma_clear_irq = tmp_hwif->ide_dma_clear_irq;
445 hwif->dma_host_on = tmp_hwif->dma_host_on;
446 hwif->dma_host_off = tmp_hwif->dma_host_off;
447 hwif->dma_lost_irq = tmp_hwif->dma_lost_irq;
448 hwif->dma_timeout = tmp_hwif->dma_timeout;
449
450 hwif->OUTB = tmp_hwif->OUTB;
451 hwif->OUTBSYNC = tmp_hwif->OUTBSYNC;
452 hwif->OUTW = tmp_hwif->OUTW;
453 hwif->OUTSW = tmp_hwif->OUTSW;
454 hwif->OUTSL = tmp_hwif->OUTSL;
455
456 hwif->INB = tmp_hwif->INB;
457 hwif->INW = tmp_hwif->INW;
458 hwif->INSW = tmp_hwif->INSW;
459 hwif->INSL = tmp_hwif->INSL;
460
461 hwif->sg_max_nents = tmp_hwif->sg_max_nents;
462
463 hwif->mmio = tmp_hwif->mmio;
464 hwif->rqsize = tmp_hwif->rqsize;
465
466 #ifndef CONFIG_BLK_DEV_IDECS
467 hwif->irq = tmp_hwif->irq;
468 #endif
469
470 hwif->dma_base = tmp_hwif->dma_base;
471 hwif->dma_master = tmp_hwif->dma_master;
472 hwif->dma_command = tmp_hwif->dma_command;
473 hwif->dma_vendor1 = tmp_hwif->dma_vendor1;
474 hwif->dma_status = tmp_hwif->dma_status;
475 hwif->dma_vendor3 = tmp_hwif->dma_vendor3;
476 hwif->dma_prdtable = tmp_hwif->dma_prdtable;
477
478 hwif->config_data = tmp_hwif->config_data;
479 hwif->select_data = tmp_hwif->select_data;
480 hwif->extra_base = tmp_hwif->extra_base;
481 hwif->extra_ports = tmp_hwif->extra_ports;
482
483 hwif->hwif_data = tmp_hwif->hwif_data;
484 }
485
486 /**
487 * ide_unregister - free an IDE interface
488 * @index: index of interface (will change soon to a pointer)
489 *
490 * Perform the final unregister of an IDE interface. At the moment
491 * we don't refcount interfaces so this will also get split up.
492 *
493 * Locking:
494 * The caller must not hold the IDE locks
495 * The drive present/vanishing is not yet properly locked
496 * Take care with the callbacks. These have been split to avoid
497 * deadlocking the IDE layer. The shutdown callback is called
498 * before we take the lock and free resources. It is up to the
499 * caller to be sure there is no pending I/O here, and that
500 * the interface will not be reopened (present/vanishing locking
501 * isn't yet done BTW). After we commit to the final kill we
502 * call the cleanup callback with the ide locks held.
503 *
504 * Unregister restores the hwif structures to the default state.
505 * This is raving bonkers.
506 */
507
508 void ide_unregister(unsigned int index)
509 {
510 ide_drive_t *drive;
511 ide_hwif_t *hwif, *g;
512 static ide_hwif_t tmp_hwif; /* protected by ide_cfg_mtx */
513 ide_hwgroup_t *hwgroup;
514 int irq_count = 0, unit;
515
516 BUG_ON(index >= MAX_HWIFS);
517
518 BUG_ON(in_interrupt());
519 BUG_ON(irqs_disabled());
520 mutex_lock(&ide_cfg_mtx);
521 spin_lock_irq(&ide_lock);
522 hwif = &ide_hwifs[index];
523 if (!hwif->present)
524 goto abort;
525 for (unit = 0; unit < MAX_DRIVES; ++unit) {
526 drive = &hwif->drives[unit];
527 if (!drive->present)
528 continue;
529 spin_unlock_irq(&ide_lock);
530 device_unregister(&drive->gendev);
531 wait_for_completion(&drive->gendev_rel_comp);
532 spin_lock_irq(&ide_lock);
533 }
534 hwif->present = 0;
535
536 spin_unlock_irq(&ide_lock);
537
538 ide_proc_unregister_port(hwif);
539
540 hwgroup = hwif->hwgroup;
541 /*
542 * free the irq if we were the only hwif using it
543 */
544 g = hwgroup->hwif;
545 do {
546 if (g->irq == hwif->irq)
547 ++irq_count;
548 g = g->next;
549 } while (g != hwgroup->hwif);
550 if (irq_count == 1)
551 free_irq(hwif->irq, hwgroup);
552
553 spin_lock_irq(&ide_lock);
554 /*
555 * Note that we only release the standard ports,
556 * and do not even try to handle any extra ports
557 * allocated for weird IDE interface chipsets.
558 */
559 ide_hwif_release_regions(hwif);
560
561 /*
562 * Remove us from the hwgroup, and free
563 * the hwgroup if we were the only member
564 */
565 if (hwif->next == hwif) {
566 BUG_ON(hwgroup->hwif != hwif);
567 kfree(hwgroup);
568 } else {
569 /* There is another interface in hwgroup.
570 * Unlink us, and set hwgroup->drive and ->hwif to
571 * something sane.
572 */
573 g = hwgroup->hwif;
574 while (g->next != hwif)
575 g = g->next;
576 g->next = hwif->next;
577 if (hwgroup->hwif == hwif) {
578 /* Chose a random hwif for hwgroup->hwif.
579 * It's guaranteed that there are no drives
580 * left in the hwgroup.
581 */
582 BUG_ON(hwgroup->drive != NULL);
583 hwgroup->hwif = g;
584 }
585 BUG_ON(hwgroup->hwif == hwif);
586 }
587
588 /* More messed up locking ... */
589 spin_unlock_irq(&ide_lock);
590 device_unregister(&hwif->gendev);
591 wait_for_completion(&hwif->gendev_rel_comp);
592
593 /*
594 * Remove us from the kernel's knowledge
595 */
596 blk_unregister_region(MKDEV(hwif->major, 0), MAX_DRIVES<<PARTN_BITS);
597 kfree(hwif->sg_table);
598 unregister_blkdev(hwif->major, hwif->name);
599 spin_lock_irq(&ide_lock);
600
601 if (hwif->dma_base) {
602 (void) ide_release_dma(hwif);
603
604 hwif->dma_base = 0;
605 hwif->dma_master = 0;
606 hwif->dma_command = 0;
607 hwif->dma_vendor1 = 0;
608 hwif->dma_status = 0;
609 hwif->dma_vendor3 = 0;
610 hwif->dma_prdtable = 0;
611
612 hwif->extra_base = 0;
613 hwif->extra_ports = 0;
614 }
615
616 /* copy original settings */
617 tmp_hwif = *hwif;
618
619 /* restore hwif data to pristine status */
620 init_hwif_data(hwif, index);
621 init_hwif_default(hwif, index);
622
623 ide_hwif_restore(hwif, &tmp_hwif);
624
625 abort:
626 spin_unlock_irq(&ide_lock);
627 mutex_unlock(&ide_cfg_mtx);
628 }
629
630 EXPORT_SYMBOL(ide_unregister);
631
632
633 /**
634 * ide_setup_ports - set up IDE interface ports
635 * @hw: register descriptions
636 * @base: base register
637 * @offsets: table of register offsets
638 * @ctrl: control register
639 * @ack_irq: IRQ ack
640 * @irq: interrupt lie
641 *
642 * Setup hw_regs_t structure described by parameters. You
643 * may set up the hw structure yourself OR use this routine to
644 * do it for you. This is basically a helper
645 *
646 */
647
648 void ide_setup_ports ( hw_regs_t *hw,
649 unsigned long base, int *offsets,
650 unsigned long ctrl, unsigned long intr,
651 ide_ack_intr_t *ack_intr,
652 /*
653 * ide_io_ops_t *iops,
654 */
655 int irq)
656 {
657 int i;
658
659 memset(hw, 0, sizeof(hw_regs_t));
660 for (i = 0; i < IDE_NR_PORTS; i++) {
661 if (offsets[i] == -1) {
662 switch(i) {
663 case IDE_CONTROL_OFFSET:
664 hw->io_ports[i] = ctrl;
665 break;
666 #if defined(CONFIG_AMIGA) || defined(CONFIG_MAC)
667 case IDE_IRQ_OFFSET:
668 hw->io_ports[i] = intr;
669 break;
670 #endif /* (CONFIG_AMIGA) || (CONFIG_MAC) */
671 default:
672 hw->io_ports[i] = 0;
673 break;
674 }
675 } else {
676 hw->io_ports[i] = base + offsets[i];
677 }
678 }
679 hw->irq = irq;
680 hw->ack_intr = ack_intr;
681 /*
682 * hw->iops = iops;
683 */
684 }
685
686 /**
687 * ide_register_hw - register IDE interface
688 * @hw: hardware registers
689 * @fixup: fixup function
690 * @initializing: set while initializing built-in drivers
691 * @hwifp: pointer to returned hwif
692 *
693 * Register an IDE interface, specifying exactly the registers etc.
694 * Set init=1 iff calling before probes have taken place.
695 *
696 * Returns -1 on error.
697 */
698
699 int ide_register_hw(hw_regs_t *hw, void (*fixup)(ide_hwif_t *),
700 int initializing, ide_hwif_t **hwifp)
701 {
702 int index, retry = 1;
703 ide_hwif_t *hwif;
704
705 do {
706 for (index = 0; index < MAX_HWIFS; ++index) {
707 hwif = &ide_hwifs[index];
708 if (hwif->io_ports[IDE_DATA_OFFSET] == hw->io_ports[IDE_DATA_OFFSET])
709 goto found;
710 }
711 for (index = 0; index < MAX_HWIFS; ++index) {
712 hwif = &ide_hwifs[index];
713 if (hwif->hold)
714 continue;
715 if ((!hwif->present && !hwif->mate && !initializing) ||
716 (!hwif->io_ports[IDE_DATA_OFFSET] && initializing))
717 goto found;
718 }
719 for (index = 0; index < MAX_HWIFS; index++)
720 ide_unregister(index);
721 } while (retry--);
722 return -1;
723 found:
724 if (hwif->present)
725 ide_unregister(index);
726 else if (!hwif->hold) {
727 init_hwif_data(hwif, index);
728 init_hwif_default(hwif, index);
729 }
730 if (hwif->present)
731 return -1;
732 memcpy(hwif->io_ports, hw->io_ports, sizeof(hwif->io_ports));
733 hwif->irq = hw->irq;
734 hwif->noprobe = 0;
735 hwif->fixup = fixup;
736 hwif->chipset = hw->chipset;
737 hwif->gendev.parent = hw->dev;
738 hwif->ack_intr = hw->ack_intr;
739
740 if (initializing == 0) {
741 u8 idx[4] = { index, 0xff, 0xff, 0xff };
742
743 ide_device_add(idx);
744 }
745
746 if (hwifp)
747 *hwifp = hwif;
748
749 return (initializing || hwif->present) ? index : -1;
750 }
751
752 EXPORT_SYMBOL(ide_register_hw);
753
754 /*
755 * Locks for IDE setting functionality
756 */
757
758 DEFINE_MUTEX(ide_setting_mtx);
759
760 EXPORT_SYMBOL_GPL(ide_setting_mtx);
761
762 /**
763 * ide_spin_wait_hwgroup - wait for group
764 * @drive: drive in the group
765 *
766 * Wait for an IDE device group to go non busy and then return
767 * holding the ide_lock which guards the hwgroup->busy status
768 * and right to use it.
769 */
770
771 int ide_spin_wait_hwgroup (ide_drive_t *drive)
772 {
773 ide_hwgroup_t *hwgroup = HWGROUP(drive);
774 unsigned long timeout = jiffies + (3 * HZ);
775
776 spin_lock_irq(&ide_lock);
777
778 while (hwgroup->busy) {
779 unsigned long lflags;
780 spin_unlock_irq(&ide_lock);
781 local_irq_set(lflags);
782 if (time_after(jiffies, timeout)) {
783 local_irq_restore(lflags);
784 printk(KERN_ERR "%s: channel busy\n", drive->name);
785 return -EBUSY;
786 }
787 local_irq_restore(lflags);
788 spin_lock_irq(&ide_lock);
789 }
790 return 0;
791 }
792
793 EXPORT_SYMBOL(ide_spin_wait_hwgroup);
794
795 int set_io_32bit(ide_drive_t *drive, int arg)
796 {
797 if (drive->no_io_32bit)
798 return -EPERM;
799
800 if (arg < 0 || arg > 1 + (SUPPORT_VLB_SYNC << 1))
801 return -EINVAL;
802
803 if (ide_spin_wait_hwgroup(drive))
804 return -EBUSY;
805
806 drive->io_32bit = arg;
807 #ifdef CONFIG_BLK_DEV_DTC2278
808 if (HWIF(drive)->chipset == ide_dtc2278)
809 HWIF(drive)->drives[!drive->select.b.unit].io_32bit = arg;
810 #endif /* CONFIG_BLK_DEV_DTC2278 */
811
812 spin_unlock_irq(&ide_lock);
813
814 return 0;
815 }
816
817 static int set_ksettings(ide_drive_t *drive, int arg)
818 {
819 if (arg < 0 || arg > 1)
820 return -EINVAL;
821
822 if (ide_spin_wait_hwgroup(drive))
823 return -EBUSY;
824 drive->keep_settings = arg;
825 spin_unlock_irq(&ide_lock);
826
827 return 0;
828 }
829
830 int set_using_dma(ide_drive_t *drive, int arg)
831 {
832 #ifdef CONFIG_BLK_DEV_IDEDMA
833 ide_hwif_t *hwif = drive->hwif;
834 int err = -EPERM;
835
836 if (arg < 0 || arg > 1)
837 return -EINVAL;
838
839 if (!drive->id || !(drive->id->capability & 1))
840 goto out;
841
842 if (hwif->ide_dma_on == NULL)
843 goto out;
844
845 err = -EBUSY;
846 if (ide_spin_wait_hwgroup(drive))
847 goto out;
848 /*
849 * set ->busy flag, unlock and let it ride
850 */
851 hwif->hwgroup->busy = 1;
852 spin_unlock_irq(&ide_lock);
853
854 err = 0;
855
856 if (arg) {
857 hwif->dma_off_quietly(drive);
858 if (ide_set_dma(drive) || hwif->ide_dma_on(drive))
859 err = -EIO;
860 } else
861 ide_dma_off(drive);
862
863 /*
864 * lock, clear ->busy flag and unlock before leaving
865 */
866 spin_lock_irq(&ide_lock);
867 hwif->hwgroup->busy = 0;
868 spin_unlock_irq(&ide_lock);
869 out:
870 return err;
871 #else
872 if (arg < 0 || arg > 1)
873 return -EINVAL;
874
875 return -EPERM;
876 #endif
877 }
878
879 int set_pio_mode(ide_drive_t *drive, int arg)
880 {
881 struct request rq;
882
883 if (arg < 0 || arg > 255)
884 return -EINVAL;
885
886 if (drive->hwif->set_pio_mode == NULL)
887 return -ENOSYS;
888
889 if (drive->special.b.set_tune)
890 return -EBUSY;
891 ide_init_drive_cmd(&rq);
892 drive->tune_req = (u8) arg;
893 drive->special.b.set_tune = 1;
894 (void) ide_do_drive_cmd(drive, &rq, ide_wait);
895 return 0;
896 }
897
898 static int set_unmaskirq(ide_drive_t *drive, int arg)
899 {
900 if (drive->no_unmask)
901 return -EPERM;
902
903 if (arg < 0 || arg > 1)
904 return -EINVAL;
905
906 if (ide_spin_wait_hwgroup(drive))
907 return -EBUSY;
908 drive->unmask = arg;
909 spin_unlock_irq(&ide_lock);
910
911 return 0;
912 }
913
914 /**
915 * system_bus_clock - clock guess
916 *
917 * External version of the bus clock guess used by very old IDE drivers
918 * for things like VLB timings. Should not be used.
919 */
920
921 int system_bus_clock (void)
922 {
923 return((int) ((!system_bus_speed) ? ide_system_bus_speed() : system_bus_speed ));
924 }
925
926 EXPORT_SYMBOL(system_bus_clock);
927
928 static int generic_ide_suspend(struct device *dev, pm_message_t mesg)
929 {
930 ide_drive_t *drive = dev->driver_data;
931 ide_hwif_t *hwif = HWIF(drive);
932 struct request rq;
933 struct request_pm_state rqpm;
934 ide_task_t args;
935 int ret;
936
937 /* Call ACPI _GTM only once */
938 if (!(drive->dn % 2))
939 ide_acpi_get_timing(hwif);
940
941 memset(&rq, 0, sizeof(rq));
942 memset(&rqpm, 0, sizeof(rqpm));
943 memset(&args, 0, sizeof(args));
944 rq.cmd_type = REQ_TYPE_PM_SUSPEND;
945 rq.special = &args;
946 rq.data = &rqpm;
947 rqpm.pm_step = ide_pm_state_start_suspend;
948 if (mesg.event == PM_EVENT_PRETHAW)
949 mesg.event = PM_EVENT_FREEZE;
950 rqpm.pm_state = mesg.event;
951
952 ret = ide_do_drive_cmd(drive, &rq, ide_wait);
953 /* only call ACPI _PS3 after both drivers are suspended */
954 if (!ret && (((drive->dn % 2) && hwif->drives[0].present
955 && hwif->drives[1].present)
956 || !hwif->drives[0].present
957 || !hwif->drives[1].present))
958 ide_acpi_set_state(hwif, 0);
959 return ret;
960 }
961
962 static int generic_ide_resume(struct device *dev)
963 {
964 ide_drive_t *drive = dev->driver_data;
965 ide_hwif_t *hwif = HWIF(drive);
966 struct request rq;
967 struct request_pm_state rqpm;
968 ide_task_t args;
969 int err;
970
971 /* Call ACPI _STM only once */
972 if (!(drive->dn % 2)) {
973 ide_acpi_set_state(hwif, 1);
974 ide_acpi_push_timing(hwif);
975 }
976
977 ide_acpi_exec_tfs(drive);
978
979 memset(&rq, 0, sizeof(rq));
980 memset(&rqpm, 0, sizeof(rqpm));
981 memset(&args, 0, sizeof(args));
982 rq.cmd_type = REQ_TYPE_PM_RESUME;
983 rq.special = &args;
984 rq.data = &rqpm;
985 rqpm.pm_step = ide_pm_state_start_resume;
986 rqpm.pm_state = PM_EVENT_ON;
987
988 err = ide_do_drive_cmd(drive, &rq, ide_head_wait);
989
990 if (err == 0 && dev->driver) {
991 ide_driver_t *drv = to_ide_driver(dev->driver);
992
993 if (drv->resume)
994 drv->resume(drive);
995 }
996
997 return err;
998 }
999
1000 int generic_ide_ioctl(ide_drive_t *drive, struct file *file, struct block_device *bdev,
1001 unsigned int cmd, unsigned long arg)
1002 {
1003 unsigned long flags;
1004 ide_driver_t *drv;
1005 void __user *p = (void __user *)arg;
1006 int err = 0, (*setfunc)(ide_drive_t *, int);
1007 u8 *val;
1008
1009 switch (cmd) {
1010 case HDIO_GET_32BIT: val = &drive->io_32bit; goto read_val;
1011 case HDIO_GET_KEEPSETTINGS: val = &drive->keep_settings; goto read_val;
1012 case HDIO_GET_UNMASKINTR: val = &drive->unmask; goto read_val;
1013 case HDIO_GET_DMA: val = &drive->using_dma; goto read_val;
1014 case HDIO_SET_32BIT: setfunc = set_io_32bit; goto set_val;
1015 case HDIO_SET_KEEPSETTINGS: setfunc = set_ksettings; goto set_val;
1016 case HDIO_SET_PIO_MODE: setfunc = set_pio_mode; goto set_val;
1017 case HDIO_SET_UNMASKINTR: setfunc = set_unmaskirq; goto set_val;
1018 case HDIO_SET_DMA: setfunc = set_using_dma; goto set_val;
1019 }
1020
1021 switch (cmd) {
1022 case HDIO_OBSOLETE_IDENTITY:
1023 case HDIO_GET_IDENTITY:
1024 if (bdev != bdev->bd_contains)
1025 return -EINVAL;
1026 if (drive->id_read == 0)
1027 return -ENOMSG;
1028 if (copy_to_user(p, drive->id, (cmd == HDIO_GET_IDENTITY) ? sizeof(*drive->id) : 142))
1029 return -EFAULT;
1030 return 0;
1031
1032 case HDIO_GET_NICE:
1033 return put_user(drive->dsc_overlap << IDE_NICE_DSC_OVERLAP |
1034 drive->atapi_overlap << IDE_NICE_ATAPI_OVERLAP |
1035 drive->nice0 << IDE_NICE_0 |
1036 drive->nice1 << IDE_NICE_1 |
1037 drive->nice2 << IDE_NICE_2,
1038 (long __user *) arg);
1039
1040 #ifdef CONFIG_IDE_TASK_IOCTL
1041 case HDIO_DRIVE_TASKFILE:
1042 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
1043 return -EACCES;
1044 switch(drive->media) {
1045 case ide_disk:
1046 return ide_taskfile_ioctl(drive, cmd, arg);
1047 default:
1048 return -ENOMSG;
1049 }
1050 #endif /* CONFIG_IDE_TASK_IOCTL */
1051
1052 case HDIO_DRIVE_CMD:
1053 if (!capable(CAP_SYS_RAWIO))
1054 return -EACCES;
1055 return ide_cmd_ioctl(drive, cmd, arg);
1056
1057 case HDIO_DRIVE_TASK:
1058 if (!capable(CAP_SYS_RAWIO))
1059 return -EACCES;
1060 return ide_task_ioctl(drive, cmd, arg);
1061
1062 case HDIO_SCAN_HWIF:
1063 {
1064 hw_regs_t hw;
1065 int args[3];
1066 if (!capable(CAP_SYS_RAWIO)) return -EACCES;
1067 if (copy_from_user(args, p, 3 * sizeof(int)))
1068 return -EFAULT;
1069 memset(&hw, 0, sizeof(hw));
1070 ide_init_hwif_ports(&hw, (unsigned long) args[0],
1071 (unsigned long) args[1], NULL);
1072 hw.irq = args[2];
1073 if (ide_register_hw(&hw, NULL, 0, NULL) == -1)
1074 return -EIO;
1075 return 0;
1076 }
1077 case HDIO_UNREGISTER_HWIF:
1078 if (!capable(CAP_SYS_RAWIO)) return -EACCES;
1079 /* (arg > MAX_HWIFS) checked in function */
1080 ide_unregister(arg);
1081 return 0;
1082 case HDIO_SET_NICE:
1083 if (!capable(CAP_SYS_ADMIN)) return -EACCES;
1084 if (arg != (arg & ((1 << IDE_NICE_DSC_OVERLAP) | (1 << IDE_NICE_1))))
1085 return -EPERM;
1086 drive->dsc_overlap = (arg >> IDE_NICE_DSC_OVERLAP) & 1;
1087 drv = *(ide_driver_t **)bdev->bd_disk->private_data;
1088 if (drive->dsc_overlap && !drv->supports_dsc_overlap) {
1089 drive->dsc_overlap = 0;
1090 return -EPERM;
1091 }
1092 drive->nice1 = (arg >> IDE_NICE_1) & 1;
1093 return 0;
1094 case HDIO_DRIVE_RESET:
1095 {
1096 unsigned long flags;
1097 if (!capable(CAP_SYS_ADMIN)) return -EACCES;
1098
1099 /*
1100 * Abort the current command on the
1101 * group if there is one, taking
1102 * care not to allow anything else
1103 * to be queued and to die on the
1104 * spot if we miss one somehow
1105 */
1106
1107 spin_lock_irqsave(&ide_lock, flags);
1108
1109 if (HWGROUP(drive)->resetting) {
1110 spin_unlock_irqrestore(&ide_lock, flags);
1111 return -EBUSY;
1112 }
1113
1114 ide_abort(drive, "drive reset");
1115
1116 BUG_ON(HWGROUP(drive)->handler);
1117
1118 /* Ensure nothing gets queued after we
1119 drop the lock. Reset will clear the busy */
1120
1121 HWGROUP(drive)->busy = 1;
1122 spin_unlock_irqrestore(&ide_lock, flags);
1123 (void) ide_do_reset(drive);
1124
1125 return 0;
1126 }
1127
1128 case HDIO_GET_BUSSTATE:
1129 if (!capable(CAP_SYS_ADMIN))
1130 return -EACCES;
1131 if (put_user(HWIF(drive)->bus_state, (long __user *)arg))
1132 return -EFAULT;
1133 return 0;
1134
1135 case HDIO_SET_BUSSTATE:
1136 if (!capable(CAP_SYS_ADMIN))
1137 return -EACCES;
1138 if (HWIF(drive)->busproc)
1139 return HWIF(drive)->busproc(drive, (int)arg);
1140 return -EOPNOTSUPP;
1141 default:
1142 return -EINVAL;
1143 }
1144
1145 read_val:
1146 mutex_lock(&ide_setting_mtx);
1147 spin_lock_irqsave(&ide_lock, flags);
1148 err = *val;
1149 spin_unlock_irqrestore(&ide_lock, flags);
1150 mutex_unlock(&ide_setting_mtx);
1151 return err >= 0 ? put_user(err, (long __user *)arg) : err;
1152
1153 set_val:
1154 if (bdev != bdev->bd_contains)
1155 err = -EINVAL;
1156 else {
1157 if (!capable(CAP_SYS_ADMIN))
1158 err = -EACCES;
1159 else {
1160 mutex_lock(&ide_setting_mtx);
1161 err = setfunc(drive, arg);
1162 mutex_unlock(&ide_setting_mtx);
1163 }
1164 }
1165 return err;
1166 }
1167
1168 EXPORT_SYMBOL(generic_ide_ioctl);
1169
1170 /*
1171 * stridx() returns the offset of c within s,
1172 * or -1 if c is '\0' or not found within s.
1173 */
1174 static int __init stridx (const char *s, char c)
1175 {
1176 char *i = strchr(s, c);
1177 return (i && c) ? i - s : -1;
1178 }
1179
1180 /*
1181 * match_parm() does parsing for ide_setup():
1182 *
1183 * 1. the first char of s must be '='.
1184 * 2. if the remainder matches one of the supplied keywords,
1185 * the index (1 based) of the keyword is negated and returned.
1186 * 3. if the remainder is a series of no more than max_vals numbers
1187 * separated by commas, the numbers are saved in vals[] and a
1188 * count of how many were saved is returned. Base10 is assumed,
1189 * and base16 is allowed when prefixed with "0x".
1190 * 4. otherwise, zero is returned.
1191 */
1192 static int __init match_parm (char *s, const char *keywords[], int vals[], int max_vals)
1193 {
1194 static const char *decimal = "0123456789";
1195 static const char *hex = "0123456789abcdef";
1196 int i, n;
1197
1198 if (*s++ == '=') {
1199 /*
1200 * Try matching against the supplied keywords,
1201 * and return -(index+1) if we match one
1202 */
1203 if (keywords != NULL) {
1204 for (i = 0; *keywords != NULL; ++i) {
1205 if (!strcmp(s, *keywords++))
1206 return -(i+1);
1207 }
1208 }
1209 /*
1210 * Look for a series of no more than "max_vals"
1211 * numeric values separated by commas, in base10,
1212 * or base16 when prefixed with "0x".
1213 * Return a count of how many were found.
1214 */
1215 for (n = 0; (i = stridx(decimal, *s)) >= 0;) {
1216 vals[n] = i;
1217 while ((i = stridx(decimal, *++s)) >= 0)
1218 vals[n] = (vals[n] * 10) + i;
1219 if (*s == 'x' && !vals[n]) {
1220 while ((i = stridx(hex, *++s)) >= 0)
1221 vals[n] = (vals[n] * 0x10) + i;
1222 }
1223 if (++n == max_vals)
1224 break;
1225 if (*s == ',' || *s == ';')
1226 ++s;
1227 }
1228 if (!*s)
1229 return n;
1230 }
1231 return 0; /* zero = nothing matched */
1232 }
1233
1234 #ifdef CONFIG_BLK_DEV_ALI14XX
1235 extern int probe_ali14xx;
1236 extern int ali14xx_init(void);
1237 #endif
1238 #ifdef CONFIG_BLK_DEV_UMC8672
1239 extern int probe_umc8672;
1240 extern int umc8672_init(void);
1241 #endif
1242 #ifdef CONFIG_BLK_DEV_DTC2278
1243 extern int probe_dtc2278;
1244 extern int dtc2278_init(void);
1245 #endif
1246 #ifdef CONFIG_BLK_DEV_HT6560B
1247 extern int probe_ht6560b;
1248 extern int ht6560b_init(void);
1249 #endif
1250 #ifdef CONFIG_BLK_DEV_QD65XX
1251 extern int probe_qd65xx;
1252 extern int qd65xx_init(void);
1253 #endif
1254
1255 static int __initdata is_chipset_set[MAX_HWIFS];
1256
1257 /*
1258 * ide_setup() gets called VERY EARLY during initialization,
1259 * to handle kernel "command line" strings beginning with "hdx=" or "ide".
1260 *
1261 * Remember to update Documentation/ide.txt if you change something here.
1262 */
1263 static int __init ide_setup(char *s)
1264 {
1265 int i, vals[3];
1266 ide_hwif_t *hwif;
1267 ide_drive_t *drive;
1268 unsigned int hw, unit;
1269 const char max_drive = 'a' + ((MAX_HWIFS * MAX_DRIVES) - 1);
1270 const char max_hwif = '0' + (MAX_HWIFS - 1);
1271
1272
1273 if (strncmp(s,"hd",2) == 0 && s[2] == '=') /* hd= is for hd.c */
1274 return 0; /* driver and not us */
1275
1276 if (strncmp(s,"ide",3) && strncmp(s,"idebus",6) && strncmp(s,"hd",2))
1277 return 0;
1278
1279 printk(KERN_INFO "ide_setup: %s", s);
1280 init_ide_data ();
1281
1282 #ifdef CONFIG_BLK_DEV_IDEDOUBLER
1283 if (!strcmp(s, "ide=doubler")) {
1284 extern int ide_doubler;
1285
1286 printk(" : Enabled support for IDE doublers\n");
1287 ide_doubler = 1;
1288 return 1;
1289 }
1290 #endif /* CONFIG_BLK_DEV_IDEDOUBLER */
1291
1292 if (!strcmp(s, "ide=nodma")) {
1293 printk(" : Prevented DMA\n");
1294 noautodma = 1;
1295 goto obsolete_option;
1296 }
1297
1298 #ifdef CONFIG_IDEPCI_PCIBUS_ORDER
1299 if (!strcmp(s, "ide=reverse")) {
1300 ide_scan_direction = 1;
1301 printk(" : Enabled support for IDE inverse scan order.\n");
1302 return 1;
1303 }
1304 #endif
1305
1306 #ifdef CONFIG_BLK_DEV_IDEACPI
1307 if (!strcmp(s, "ide=noacpi")) {
1308 //printk(" : Disable IDE ACPI support.\n");
1309 ide_noacpi = 1;
1310 return 1;
1311 }
1312 if (!strcmp(s, "ide=acpigtf")) {
1313 //printk(" : Enable IDE ACPI _GTF support.\n");
1314 ide_noacpitfs = 0;
1315 return 1;
1316 }
1317 if (!strcmp(s, "ide=acpionboot")) {
1318 //printk(" : Call IDE ACPI methods on boot.\n");
1319 ide_noacpionboot = 0;
1320 return 1;
1321 }
1322 #endif /* CONFIG_BLK_DEV_IDEACPI */
1323
1324 /*
1325 * Look for drive options: "hdx="
1326 */
1327 if (s[0] == 'h' && s[1] == 'd' && s[2] >= 'a' && s[2] <= max_drive) {
1328 const char *hd_words[] = {
1329 "none", "noprobe", "nowerr", "cdrom", "nodma",
1330 "autotune", "noautotune", "minus8", "swapdata", "bswap",
1331 "noflush", "remap", "remap63", "scsi", NULL };
1332 unit = s[2] - 'a';
1333 hw = unit / MAX_DRIVES;
1334 unit = unit % MAX_DRIVES;
1335 hwif = &ide_hwifs[hw];
1336 drive = &hwif->drives[unit];
1337 if (strncmp(s + 4, "ide-", 4) == 0) {
1338 strlcpy(drive->driver_req, s + 4, sizeof(drive->driver_req));
1339 goto done;
1340 }
1341 switch (match_parm(&s[3], hd_words, vals, 3)) {
1342 case -1: /* "none" */
1343 case -2: /* "noprobe" */
1344 drive->noprobe = 1;
1345 goto done;
1346 case -3: /* "nowerr" */
1347 drive->bad_wstat = BAD_R_STAT;
1348 hwif->noprobe = 0;
1349 goto done;
1350 case -4: /* "cdrom" */
1351 drive->present = 1;
1352 drive->media = ide_cdrom;
1353 /* an ATAPI device ignores DRDY */
1354 drive->ready_stat = 0;
1355 hwif->noprobe = 0;
1356 goto done;
1357 case -5: /* nodma */
1358 drive->nodma = 1;
1359 goto done;
1360 case -6: /* "autotune" */
1361 drive->autotune = IDE_TUNE_AUTO;
1362 goto obsolete_option;
1363 case -7: /* "noautotune" */
1364 drive->autotune = IDE_TUNE_NOAUTO;
1365 goto obsolete_option;
1366 case -9: /* "swapdata" */
1367 case -10: /* "bswap" */
1368 drive->bswap = 1;
1369 goto done;
1370 case -11: /* noflush */
1371 drive->noflush = 1;
1372 goto done;
1373 case -12: /* "remap" */
1374 drive->remap_0_to_1 = 1;
1375 goto done;
1376 case -13: /* "remap63" */
1377 drive->sect0 = 63;
1378 goto done;
1379 case -14: /* "scsi" */
1380 drive->scsi = 1;
1381 goto done;
1382 case 3: /* cyl,head,sect */
1383 drive->media = ide_disk;
1384 drive->ready_stat = READY_STAT;
1385 drive->cyl = drive->bios_cyl = vals[0];
1386 drive->head = drive->bios_head = vals[1];
1387 drive->sect = drive->bios_sect = vals[2];
1388 drive->present = 1;
1389 drive->forced_geom = 1;
1390 hwif->noprobe = 0;
1391 goto done;
1392 default:
1393 goto bad_option;
1394 }
1395 }
1396
1397 if (s[0] != 'i' || s[1] != 'd' || s[2] != 'e')
1398 goto bad_option;
1399 /*
1400 * Look for bus speed option: "idebus="
1401 */
1402 if (s[3] == 'b' && s[4] == 'u' && s[5] == 's') {
1403 if (match_parm(&s[6], NULL, vals, 1) != 1)
1404 goto bad_option;
1405 if (vals[0] >= 20 && vals[0] <= 66) {
1406 idebus_parameter = vals[0];
1407 } else
1408 printk(" -- BAD BUS SPEED! Expected value from 20 to 66");
1409 goto done;
1410 }
1411 /*
1412 * Look for interface options: "idex="
1413 */
1414 if (s[3] >= '0' && s[3] <= max_hwif) {
1415 /*
1416 * Be VERY CAREFUL changing this: note hardcoded indexes below
1417 * (-8, -9, -10) are reserved to ease the hardcoding.
1418 */
1419 static const char *ide_words[] = {
1420 "noprobe", "serialize", "minus3", "minus4",
1421 "reset", "minus6", "ata66", "minus8", "minus9",
1422 "minus10", "four", "qd65xx", "ht6560b", "cmd640_vlb",
1423 "dtc2278", "umc8672", "ali14xx", NULL };
1424
1425 hw_regs_t hwregs;
1426
1427 hw = s[3] - '0';
1428 hwif = &ide_hwifs[hw];
1429 i = match_parm(&s[4], ide_words, vals, 3);
1430
1431 /*
1432 * Cryptic check to ensure chipset not already set for hwif.
1433 * Note: we can't depend on hwif->chipset here.
1434 */
1435 if ((i >= -18 && i <= -11) || (i > 0 && i <= 3)) {
1436 /* chipset already specified */
1437 if (is_chipset_set[hw])
1438 goto bad_option;
1439 if (i > -18 && i <= -11) {
1440 /* these drivers are for "ide0=" only */
1441 if (hw != 0)
1442 goto bad_hwif;
1443 /* chipset already specified for 2nd port */
1444 if (is_chipset_set[hw+1])
1445 goto bad_option;
1446 }
1447 is_chipset_set[hw] = 1;
1448 printk("\n");
1449 }
1450
1451 switch (i) {
1452 #ifdef CONFIG_BLK_DEV_ALI14XX
1453 case -17: /* "ali14xx" */
1454 probe_ali14xx = 1;
1455 goto done;
1456 #endif
1457 #ifdef CONFIG_BLK_DEV_UMC8672
1458 case -16: /* "umc8672" */
1459 probe_umc8672 = 1;
1460 goto done;
1461 #endif
1462 #ifdef CONFIG_BLK_DEV_DTC2278
1463 case -15: /* "dtc2278" */
1464 probe_dtc2278 = 1;
1465 goto done;
1466 #endif
1467 #ifdef CONFIG_BLK_DEV_CMD640
1468 case -14: /* "cmd640_vlb" */
1469 {
1470 extern int cmd640_vlb; /* flag for cmd640.c */
1471 cmd640_vlb = 1;
1472 goto done;
1473 }
1474 #endif
1475 #ifdef CONFIG_BLK_DEV_HT6560B
1476 case -13: /* "ht6560b" */
1477 probe_ht6560b = 1;
1478 goto done;
1479 #endif
1480 #ifdef CONFIG_BLK_DEV_QD65XX
1481 case -12: /* "qd65xx" */
1482 probe_qd65xx = 1;
1483 goto done;
1484 #endif
1485 #ifdef CONFIG_BLK_DEV_4DRIVES
1486 case -11: /* "four" drives on one set of ports */
1487 {
1488 ide_hwif_t *mate = &ide_hwifs[hw^1];
1489 mate->drives[0].select.all ^= 0x20;
1490 mate->drives[1].select.all ^= 0x20;
1491 hwif->chipset = mate->chipset = ide_4drives;
1492 mate->irq = hwif->irq;
1493 memcpy(mate->io_ports, hwif->io_ports, sizeof(hwif->io_ports));
1494 hwif->mate = mate;
1495 mate->mate = hwif;
1496 hwif->serialized = mate->serialized = 1;
1497 goto obsolete_option;
1498 }
1499 #endif /* CONFIG_BLK_DEV_4DRIVES */
1500 case -10: /* minus10 */
1501 case -9: /* minus9 */
1502 case -8: /* minus8 */
1503 case -6:
1504 case -4:
1505 case -3:
1506 goto bad_option;
1507 case -7: /* ata66 */
1508 #ifdef CONFIG_BLK_DEV_IDEPCI
1509 /*
1510 * Use ATA_CBL_PATA40_SHORT so drive side
1511 * cable detection is also overriden.
1512 */
1513 hwif->cbl = ATA_CBL_PATA40_SHORT;
1514 goto obsolete_option;
1515 #else
1516 goto bad_hwif;
1517 #endif
1518 case -5: /* "reset" */
1519 hwif->reset = 1;
1520 goto obsolete_option;
1521 case -2: /* "serialize" */
1522 hwif->mate = &ide_hwifs[hw^1];
1523 hwif->mate->mate = hwif;
1524 hwif->serialized = hwif->mate->serialized = 1;
1525 goto obsolete_option;
1526
1527 case -1: /* "noprobe" */
1528 hwif->noprobe = 1;
1529 goto done;
1530
1531 case 1: /* base */
1532 vals[1] = vals[0] + 0x206; /* default ctl */
1533 case 2: /* base,ctl */
1534 vals[2] = 0; /* default irq = probe for it */
1535 case 3: /* base,ctl,irq */
1536 memset(&hwregs, 0, sizeof(hwregs));
1537 ide_init_hwif_ports(&hwregs, vals[0], vals[1], &hwif->irq);
1538 memcpy(hwif->io_ports, hwregs.io_ports, sizeof(hwif->io_ports));
1539 hwif->irq = vals[2];
1540 hwif->noprobe = 0;
1541 hwif->chipset = ide_forced;
1542 goto obsolete_option;
1543
1544 case 0: goto bad_option;
1545 default:
1546 printk(" -- SUPPORT NOT CONFIGURED IN THIS KERNEL\n");
1547 return 1;
1548 }
1549 }
1550 bad_option:
1551 printk(" -- BAD OPTION\n");
1552 return 1;
1553 obsolete_option:
1554 printk(" -- OBSOLETE OPTION, WILL BE REMOVED SOON!\n");
1555 return 1;
1556 bad_hwif:
1557 printk("-- NOT SUPPORTED ON ide%d", hw);
1558 done:
1559 printk("\n");
1560 return 1;
1561 }
1562
1563 extern void __init pnpide_init(void);
1564 extern void __exit pnpide_exit(void);
1565 extern void __init h8300_ide_init(void);
1566
1567 /*
1568 * probe_for_hwifs() finds/initializes "known" IDE interfaces
1569 */
1570 static void __init probe_for_hwifs (void)
1571 {
1572 #ifdef CONFIG_IDEPCI_PCIBUS_ORDER
1573 ide_scan_pcibus(ide_scan_direction);
1574 #endif
1575
1576 #ifdef CONFIG_ETRAX_IDE
1577 {
1578 extern void init_e100_ide(void);
1579 init_e100_ide();
1580 }
1581 #endif /* CONFIG_ETRAX_IDE */
1582 #ifdef CONFIG_BLK_DEV_CMD640
1583 {
1584 extern void ide_probe_for_cmd640x(void);
1585 ide_probe_for_cmd640x();
1586 }
1587 #endif /* CONFIG_BLK_DEV_CMD640 */
1588 #ifdef CONFIG_BLK_DEV_IDE_PMAC
1589 {
1590 extern int pmac_ide_probe(void);
1591 (void)pmac_ide_probe();
1592 }
1593 #endif /* CONFIG_BLK_DEV_IDE_PMAC */
1594 #ifdef CONFIG_BLK_DEV_GAYLE
1595 {
1596 extern void gayle_init(void);
1597 gayle_init();
1598 }
1599 #endif /* CONFIG_BLK_DEV_GAYLE */
1600 #ifdef CONFIG_BLK_DEV_FALCON_IDE
1601 {
1602 extern void falconide_init(void);
1603 falconide_init();
1604 }
1605 #endif /* CONFIG_BLK_DEV_FALCON_IDE */
1606 #ifdef CONFIG_BLK_DEV_MAC_IDE
1607 {
1608 extern void macide_init(void);
1609 macide_init();
1610 }
1611 #endif /* CONFIG_BLK_DEV_MAC_IDE */
1612 #ifdef CONFIG_BLK_DEV_Q40IDE
1613 {
1614 extern void q40ide_init(void);
1615 q40ide_init();
1616 }
1617 #endif /* CONFIG_BLK_DEV_Q40IDE */
1618 #ifdef CONFIG_BLK_DEV_BUDDHA
1619 {
1620 extern void buddha_init(void);
1621 buddha_init();
1622 }
1623 #endif /* CONFIG_BLK_DEV_BUDDHA */
1624 #ifdef CONFIG_BLK_DEV_IDEPNP
1625 pnpide_init();
1626 #endif
1627 #ifdef CONFIG_H8300
1628 h8300_ide_init();
1629 #endif
1630 }
1631
1632 /*
1633 * Probe module
1634 */
1635
1636 EXPORT_SYMBOL(ide_lock);
1637
1638 static int ide_bus_match(struct device *dev, struct device_driver *drv)
1639 {
1640 return 1;
1641 }
1642
1643 static char *media_string(ide_drive_t *drive)
1644 {
1645 switch (drive->media) {
1646 case ide_disk:
1647 return "disk";
1648 case ide_cdrom:
1649 return "cdrom";
1650 case ide_tape:
1651 return "tape";
1652 case ide_floppy:
1653 return "floppy";
1654 case ide_optical:
1655 return "optical";
1656 default:
1657 return "UNKNOWN";
1658 }
1659 }
1660
1661 static ssize_t media_show(struct device *dev, struct device_attribute *attr, char *buf)
1662 {
1663 ide_drive_t *drive = to_ide_device(dev);
1664 return sprintf(buf, "%s\n", media_string(drive));
1665 }
1666
1667 static ssize_t drivename_show(struct device *dev, struct device_attribute *attr, char *buf)
1668 {
1669 ide_drive_t *drive = to_ide_device(dev);
1670 return sprintf(buf, "%s\n", drive->name);
1671 }
1672
1673 static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf)
1674 {
1675 ide_drive_t *drive = to_ide_device(dev);
1676 return sprintf(buf, "ide:m-%s\n", media_string(drive));
1677 }
1678
1679 static ssize_t model_show(struct device *dev, struct device_attribute *attr,
1680 char *buf)
1681 {
1682 ide_drive_t *drive = to_ide_device(dev);
1683 return sprintf(buf, "%s\n", drive->id->model);
1684 }
1685
1686 static ssize_t firmware_show(struct device *dev, struct device_attribute *attr,
1687 char *buf)
1688 {
1689 ide_drive_t *drive = to_ide_device(dev);
1690 return sprintf(buf, "%s\n", drive->id->fw_rev);
1691 }
1692
1693 static ssize_t serial_show(struct device *dev, struct device_attribute *attr,
1694 char *buf)
1695 {
1696 ide_drive_t *drive = to_ide_device(dev);
1697 return sprintf(buf, "%s\n", drive->id->serial_no);
1698 }
1699
1700 static struct device_attribute ide_dev_attrs[] = {
1701 __ATTR_RO(media),
1702 __ATTR_RO(drivename),
1703 __ATTR_RO(modalias),
1704 __ATTR_RO(model),
1705 __ATTR_RO(firmware),
1706 __ATTR(serial, 0400, serial_show, NULL),
1707 __ATTR_NULL
1708 };
1709
1710 static int ide_uevent(struct device *dev, struct kobj_uevent_env *env)
1711 {
1712 ide_drive_t *drive = to_ide_device(dev);
1713
1714 add_uevent_var(env, "MEDIA=%s", media_string(drive));
1715 add_uevent_var(env, "DRIVENAME=%s", drive->name);
1716 add_uevent_var(env, "MODALIAS=ide:m-%s", media_string(drive));
1717 return 0;
1718 }
1719
1720 static int generic_ide_probe(struct device *dev)
1721 {
1722 ide_drive_t *drive = to_ide_device(dev);
1723 ide_driver_t *drv = to_ide_driver(dev->driver);
1724
1725 return drv->probe ? drv->probe(drive) : -ENODEV;
1726 }
1727
1728 static int generic_ide_remove(struct device *dev)
1729 {
1730 ide_drive_t *drive = to_ide_device(dev);
1731 ide_driver_t *drv = to_ide_driver(dev->driver);
1732
1733 if (drv->remove)
1734 drv->remove(drive);
1735
1736 return 0;
1737 }
1738
1739 static void generic_ide_shutdown(struct device *dev)
1740 {
1741 ide_drive_t *drive = to_ide_device(dev);
1742 ide_driver_t *drv = to_ide_driver(dev->driver);
1743
1744 if (dev->driver && drv->shutdown)
1745 drv->shutdown(drive);
1746 }
1747
1748 struct bus_type ide_bus_type = {
1749 .name = "ide",
1750 .match = ide_bus_match,
1751 .uevent = ide_uevent,
1752 .probe = generic_ide_probe,
1753 .remove = generic_ide_remove,
1754 .shutdown = generic_ide_shutdown,
1755 .dev_attrs = ide_dev_attrs,
1756 .suspend = generic_ide_suspend,
1757 .resume = generic_ide_resume,
1758 };
1759
1760 EXPORT_SYMBOL_GPL(ide_bus_type);
1761
1762 /*
1763 * This is gets invoked once during initialization, to set *everything* up
1764 */
1765 static int __init ide_init(void)
1766 {
1767 int ret;
1768
1769 printk(KERN_INFO "Uniform Multi-Platform E-IDE driver " REVISION "\n");
1770 system_bus_speed = ide_system_bus_speed();
1771
1772 ret = bus_register(&ide_bus_type);
1773 if (ret < 0) {
1774 printk(KERN_WARNING "IDE: bus_register error: %d\n", ret);
1775 return ret;
1776 }
1777
1778 init_ide_data();
1779
1780 proc_ide_create();
1781
1782 #ifdef CONFIG_BLK_DEV_ALI14XX
1783 if (probe_ali14xx)
1784 (void)ali14xx_init();
1785 #endif
1786 #ifdef CONFIG_BLK_DEV_UMC8672
1787 if (probe_umc8672)
1788 (void)umc8672_init();
1789 #endif
1790 #ifdef CONFIG_BLK_DEV_DTC2278
1791 if (probe_dtc2278)
1792 (void)dtc2278_init();
1793 #endif
1794 #ifdef CONFIG_BLK_DEV_HT6560B
1795 if (probe_ht6560b)
1796 (void)ht6560b_init();
1797 #endif
1798 #ifdef CONFIG_BLK_DEV_QD65XX
1799 if (probe_qd65xx)
1800 (void)qd65xx_init();
1801 #endif
1802
1803 /* Probe for special PCI and other "known" interface chipsets. */
1804 probe_for_hwifs();
1805
1806 return 0;
1807 }
1808
1809 #ifdef MODULE
1810 static char *options = NULL;
1811 module_param(options, charp, 0);
1812 MODULE_LICENSE("GPL");
1813
1814 static void __init parse_options (char *line)
1815 {
1816 char *next = line;
1817
1818 if (line == NULL || !*line)
1819 return;
1820 while ((line = next) != NULL) {
1821 if ((next = strchr(line,' ')) != NULL)
1822 *next++ = 0;
1823 if (!ide_setup(line))
1824 printk (KERN_INFO "Unknown option '%s'\n", line);
1825 }
1826 }
1827
1828 int __init init_module (void)
1829 {
1830 parse_options(options);
1831 return ide_init();
1832 }
1833
1834 void __exit cleanup_module (void)
1835 {
1836 int index;
1837
1838 for (index = 0; index < MAX_HWIFS; ++index)
1839 ide_unregister(index);
1840
1841 #ifdef CONFIG_BLK_DEV_IDEPNP
1842 pnpide_exit();
1843 #endif
1844
1845 proc_ide_destroy();
1846
1847 bus_unregister(&ide_bus_type);
1848 }
1849
1850 #else /* !MODULE */
1851
1852 __setup("", ide_setup);
1853
1854 module_init(ide_init);
1855
1856 #endif /* MODULE */
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree