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ide: remove redundant init_hwif_default() call from ide_register_hw()
[deliverable/linux.git] / drivers / ide / ide.c
1 /*
2 * Copyright (C) 1994-1998 Linus Torvalds & authors (see below)
3 * Copyrifht (C) 2003-2005, 2007 Bartlomiej Zolnierkiewicz
4 */
5
6 /*
7 * Mostly written by Mark Lord <mlord@pobox.com>
8 * and Gadi Oxman <gadio@netvision.net.il>
9 * and Andre Hedrick <andre@linux-ide.org>
10 *
11 * See linux/MAINTAINERS for address of current maintainer.
12 *
13 * This is the multiple IDE interface driver, as evolved from hd.c.
14 * It supports up to MAX_HWIFS IDE interfaces, on one or more IRQs
15 * (usually 14 & 15).
16 * There can be up to two drives per interface, as per the ATA-2 spec.
17 *
18 * ...
19 *
20 * From hd.c:
21 * |
22 * | It traverses the request-list, using interrupts to jump between functions.
23 * | As nearly all functions can be called within interrupts, we may not sleep.
24 * | Special care is recommended. Have Fun!
25 * |
26 * | modified by Drew Eckhardt to check nr of hd's from the CMOS.
27 * |
28 * | Thanks to Branko Lankester, lankeste@fwi.uva.nl, who found a bug
29 * | in the early extended-partition checks and added DM partitions.
30 * |
31 * | Early work on error handling by Mika Liljeberg (liljeber@cs.Helsinki.FI).
32 * |
33 * | IRQ-unmask, drive-id, multiple-mode, support for ">16 heads",
34 * | and general streamlining by Mark Lord (mlord@pobox.com).
35 *
36 * October, 1994 -- Complete line-by-line overhaul for linux 1.1.x, by:
37 *
38 * Mark Lord (mlord@pobox.com) (IDE Perf.Pkg)
39 * Delman Lee (delman@ieee.org) ("Mr. atdisk2")
40 * Scott Snyder (snyder@fnald0.fnal.gov) (ATAPI IDE cd-rom)
41 *
42 * This was a rewrite of just about everything from hd.c, though some original
43 * code is still sprinkled about. Think of it as a major evolution, with
44 * inspiration from lots of linux users, esp. hamish@zot.apana.org.au
45 */
46
47 #define REVISION "Revision: 7.00alpha2"
48
49 #define _IDE_C /* Tell ide.h it's really us */
50
51 #include <linux/module.h>
52 #include <linux/types.h>
53 #include <linux/string.h>
54 #include <linux/kernel.h>
55 #include <linux/timer.h>
56 #include <linux/mm.h>
57 #include <linux/interrupt.h>
58 #include <linux/major.h>
59 #include <linux/errno.h>
60 #include <linux/genhd.h>
61 #include <linux/blkpg.h>
62 #include <linux/slab.h>
63 #include <linux/init.h>
64 #include <linux/pci.h>
65 #include <linux/delay.h>
66 #include <linux/ide.h>
67 #include <linux/completion.h>
68 #include <linux/reboot.h>
69 #include <linux/cdrom.h>
70 #include <linux/seq_file.h>
71 #include <linux/device.h>
72 #include <linux/bitops.h>
73
74 #include <asm/byteorder.h>
75 #include <asm/irq.h>
76 #include <asm/uaccess.h>
77 #include <asm/io.h>
78
79
80 /* default maximum number of failures */
81 #define IDE_DEFAULT_MAX_FAILURES 1
82
83 static const u8 ide_hwif_to_major[] = { IDE0_MAJOR, IDE1_MAJOR,
84 IDE2_MAJOR, IDE3_MAJOR,
85 IDE4_MAJOR, IDE5_MAJOR,
86 IDE6_MAJOR, IDE7_MAJOR,
87 IDE8_MAJOR, IDE9_MAJOR };
88
89 static int idebus_parameter; /* holds the "idebus=" parameter */
90 static int system_bus_speed; /* holds what we think is VESA/PCI bus speed */
91
92 DEFINE_MUTEX(ide_cfg_mtx);
93 __cacheline_aligned_in_smp DEFINE_SPINLOCK(ide_lock);
94
95 #ifdef CONFIG_IDEPCI_PCIBUS_ORDER
96 int ide_scan_direction; /* THIS was formerly 2.2.x pci=reverse */
97 #endif
98
99 int noautodma = 0;
100
101 #ifdef CONFIG_BLK_DEV_IDEACPI
102 int ide_noacpi = 0;
103 int ide_noacpitfs = 1;
104 int ide_noacpionboot = 1;
105 #endif
106
107 /*
108 * This is declared extern in ide.h, for access by other IDE modules:
109 */
110 ide_hwif_t ide_hwifs[MAX_HWIFS]; /* master data repository */
111
112 EXPORT_SYMBOL(ide_hwifs);
113
114 /*
115 * Do not even *think* about calling this!
116 */
117 void ide_init_port_data(ide_hwif_t *hwif, unsigned int index)
118 {
119 unsigned int unit;
120
121 /* bulk initialize hwif & drive info with zeros */
122 memset(hwif, 0, sizeof(ide_hwif_t));
123
124 /* fill in any non-zero initial values */
125 hwif->index = index;
126 hwif->major = ide_hwif_to_major[index];
127
128 hwif->name[0] = 'i';
129 hwif->name[1] = 'd';
130 hwif->name[2] = 'e';
131 hwif->name[3] = '0' + index;
132
133 hwif->bus_state = BUSSTATE_ON;
134
135 init_completion(&hwif->gendev_rel_comp);
136
137 default_hwif_iops(hwif);
138 default_hwif_transport(hwif);
139 for (unit = 0; unit < MAX_DRIVES; ++unit) {
140 ide_drive_t *drive = &hwif->drives[unit];
141
142 drive->media = ide_disk;
143 drive->select.all = (unit<<4)|0xa0;
144 drive->hwif = hwif;
145 drive->ctl = 0x08;
146 drive->ready_stat = READY_STAT;
147 drive->bad_wstat = BAD_W_STAT;
148 drive->special.b.recalibrate = 1;
149 drive->special.b.set_geometry = 1;
150 drive->name[0] = 'h';
151 drive->name[1] = 'd';
152 drive->name[2] = 'a' + (index * MAX_DRIVES) + unit;
153 drive->max_failures = IDE_DEFAULT_MAX_FAILURES;
154 drive->using_dma = 0;
155 drive->vdma = 0;
156 INIT_LIST_HEAD(&drive->list);
157 init_completion(&drive->gendev_rel_comp);
158 }
159 }
160 EXPORT_SYMBOL_GPL(ide_init_port_data);
161
162 static void init_hwif_default(ide_hwif_t *hwif, unsigned int index)
163 {
164 hw_regs_t hw;
165
166 memset(&hw, 0, sizeof(hw_regs_t));
167
168 ide_init_hwif_ports(&hw, ide_default_io_base(index), 0, &hwif->irq);
169
170 memcpy(hwif->io_ports, hw.io_ports, sizeof(hw.io_ports));
171
172 hwif->noprobe = !hwif->io_ports[IDE_DATA_OFFSET];
173 #ifdef CONFIG_BLK_DEV_HD
174 if (hwif->io_ports[IDE_DATA_OFFSET] == HD_DATA)
175 hwif->noprobe = 1; /* may be overridden by ide_setup() */
176 #endif
177 }
178
179 /*
180 * init_ide_data() sets reasonable default values into all fields
181 * of all instances of the hwifs and drives, but only on the first call.
182 * Subsequent calls have no effect (they don't wipe out anything).
183 *
184 * This routine is normally called at driver initialization time,
185 * but may also be called MUCH earlier during kernel "command-line"
186 * parameter processing. As such, we cannot depend on any other parts
187 * of the kernel (such as memory allocation) to be functioning yet.
188 *
189 * This is too bad, as otherwise we could dynamically allocate the
190 * ide_drive_t structs as needed, rather than always consuming memory
191 * for the max possible number (MAX_HWIFS * MAX_DRIVES) of them.
192 *
193 * FIXME: We should stuff the setup data into __init and copy the
194 * relevant hwifs/allocate them properly during boot.
195 */
196 #define MAGIC_COOKIE 0x12345678
197 static void __init init_ide_data (void)
198 {
199 ide_hwif_t *hwif;
200 unsigned int index;
201 static unsigned long magic_cookie = MAGIC_COOKIE;
202
203 if (magic_cookie != MAGIC_COOKIE)
204 return; /* already initialized */
205 magic_cookie = 0;
206
207 /* Initialise all interface structures */
208 for (index = 0; index < MAX_HWIFS; ++index) {
209 hwif = &ide_hwifs[index];
210 ide_init_port_data(hwif, index);
211 init_hwif_default(hwif, index);
212 #if !defined(CONFIG_PPC32) || !defined(CONFIG_PCI)
213 hwif->irq =
214 ide_init_default_irq(hwif->io_ports[IDE_DATA_OFFSET]);
215 #endif
216 }
217 }
218
219 /**
220 * ide_system_bus_speed - guess bus speed
221 *
222 * ide_system_bus_speed() returns what we think is the system VESA/PCI
223 * bus speed (in MHz). This is used for calculating interface PIO timings.
224 * The default is 40 for known PCI systems, 50 otherwise.
225 * The "idebus=xx" parameter can be used to override this value.
226 * The actual value to be used is computed/displayed the first time
227 * through. Drivers should only use this as a last resort.
228 *
229 * Returns a guessed speed in MHz.
230 */
231
232 static int ide_system_bus_speed(void)
233 {
234 #ifdef CONFIG_PCI
235 static struct pci_device_id pci_default[] = {
236 { PCI_DEVICE(PCI_ANY_ID, PCI_ANY_ID) },
237 { }
238 };
239 #else
240 #define pci_default 0
241 #endif /* CONFIG_PCI */
242
243 /* user supplied value */
244 if (idebus_parameter)
245 return idebus_parameter;
246
247 /* safe default value for PCI or VESA and PCI*/
248 return pci_dev_present(pci_default) ? 33 : 50;
249 }
250
251 ide_hwif_t * ide_find_port(unsigned long base)
252 {
253 ide_hwif_t *hwif;
254 int i;
255
256 for (i = 0; i < MAX_HWIFS; i++) {
257 hwif = &ide_hwifs[i];
258 if (hwif->io_ports[IDE_DATA_OFFSET] == base)
259 goto found;
260 }
261
262 for (i = 0; i < MAX_HWIFS; i++) {
263 hwif = &ide_hwifs[i];
264 if (hwif->io_ports[IDE_DATA_OFFSET] == 0)
265 goto found;
266 }
267
268 hwif = NULL;
269 found:
270 return hwif;
271 }
272
273 EXPORT_SYMBOL_GPL(ide_find_port);
274
275 static struct resource* hwif_request_region(ide_hwif_t *hwif,
276 unsigned long addr, int num)
277 {
278 struct resource *res = request_region(addr, num, hwif->name);
279
280 if (!res)
281 printk(KERN_ERR "%s: I/O resource 0x%lX-0x%lX not free.\n",
282 hwif->name, addr, addr+num-1);
283 return res;
284 }
285
286 /**
287 * ide_hwif_request_regions - request resources for IDE
288 * @hwif: interface to use
289 *
290 * Requests all the needed resources for an interface.
291 * Right now core IDE code does this work which is deeply wrong.
292 * MMIO leaves it to the controller driver,
293 * PIO will migrate this way over time.
294 */
295
296 int ide_hwif_request_regions(ide_hwif_t *hwif)
297 {
298 unsigned long addr;
299 unsigned int i;
300
301 if (hwif->mmio)
302 return 0;
303 addr = hwif->io_ports[IDE_CONTROL_OFFSET];
304 if (addr && !hwif_request_region(hwif, addr, 1))
305 goto control_region_busy;
306 hwif->straight8 = 0;
307 addr = hwif->io_ports[IDE_DATA_OFFSET];
308 if ((addr | 7) == hwif->io_ports[IDE_STATUS_OFFSET]) {
309 if (!hwif_request_region(hwif, addr, 8))
310 goto data_region_busy;
311 hwif->straight8 = 1;
312 return 0;
313 }
314 for (i = IDE_DATA_OFFSET; i <= IDE_STATUS_OFFSET; i++) {
315 addr = hwif->io_ports[i];
316 if (!hwif_request_region(hwif, addr, 1)) {
317 while (--i)
318 release_region(addr, 1);
319 goto data_region_busy;
320 }
321 }
322 return 0;
323
324 data_region_busy:
325 addr = hwif->io_ports[IDE_CONTROL_OFFSET];
326 if (addr)
327 release_region(addr, 1);
328 control_region_busy:
329 /* If any errors are return, we drop the hwif interface. */
330 return -EBUSY;
331 }
332
333 /**
334 * ide_hwif_release_regions - free IDE resources
335 *
336 * Note that we only release the standard ports,
337 * and do not even try to handle any extra ports
338 * allocated for weird IDE interface chipsets.
339 *
340 * Note also that we don't yet handle mmio resources here. More
341 * importantly our caller should be doing this so we need to
342 * restructure this as a helper function for drivers.
343 */
344
345 void ide_hwif_release_regions(ide_hwif_t *hwif)
346 {
347 u32 i = 0;
348
349 if (hwif->mmio)
350 return;
351 if (hwif->io_ports[IDE_CONTROL_OFFSET])
352 release_region(hwif->io_ports[IDE_CONTROL_OFFSET], 1);
353 if (hwif->straight8) {
354 release_region(hwif->io_ports[IDE_DATA_OFFSET], 8);
355 return;
356 }
357 for (i = IDE_DATA_OFFSET; i <= IDE_STATUS_OFFSET; i++)
358 if (hwif->io_ports[i])
359 release_region(hwif->io_ports[i], 1);
360 }
361
362 /**
363 * ide_hwif_restore - restore hwif to template
364 * @hwif: hwif to update
365 * @tmp_hwif: template
366 *
367 * Restore hwif to a previous state by copying most settings
368 * from the template.
369 */
370
371 static void ide_hwif_restore(ide_hwif_t *hwif, ide_hwif_t *tmp_hwif)
372 {
373 hwif->hwgroup = tmp_hwif->hwgroup;
374
375 hwif->gendev.parent = tmp_hwif->gendev.parent;
376
377 hwif->proc = tmp_hwif->proc;
378
379 hwif->major = tmp_hwif->major;
380 hwif->straight8 = tmp_hwif->straight8;
381 hwif->bus_state = tmp_hwif->bus_state;
382
383 hwif->host_flags = tmp_hwif->host_flags;
384
385 hwif->pio_mask = tmp_hwif->pio_mask;
386
387 hwif->ultra_mask = tmp_hwif->ultra_mask;
388 hwif->mwdma_mask = tmp_hwif->mwdma_mask;
389 hwif->swdma_mask = tmp_hwif->swdma_mask;
390
391 hwif->cbl = tmp_hwif->cbl;
392
393 hwif->chipset = tmp_hwif->chipset;
394 hwif->hold = tmp_hwif->hold;
395
396 hwif->dev = tmp_hwif->dev;
397
398 #ifdef CONFIG_BLK_DEV_IDEPCI
399 hwif->cds = tmp_hwif->cds;
400 #endif
401
402 hwif->set_pio_mode = tmp_hwif->set_pio_mode;
403 hwif->set_dma_mode = tmp_hwif->set_dma_mode;
404 hwif->mdma_filter = tmp_hwif->mdma_filter;
405 hwif->udma_filter = tmp_hwif->udma_filter;
406 hwif->selectproc = tmp_hwif->selectproc;
407 hwif->reset_poll = tmp_hwif->reset_poll;
408 hwif->pre_reset = tmp_hwif->pre_reset;
409 hwif->resetproc = tmp_hwif->resetproc;
410 hwif->maskproc = tmp_hwif->maskproc;
411 hwif->quirkproc = tmp_hwif->quirkproc;
412 hwif->busproc = tmp_hwif->busproc;
413
414 hwif->ata_input_data = tmp_hwif->ata_input_data;
415 hwif->ata_output_data = tmp_hwif->ata_output_data;
416 hwif->atapi_input_bytes = tmp_hwif->atapi_input_bytes;
417 hwif->atapi_output_bytes = tmp_hwif->atapi_output_bytes;
418
419 hwif->dma_host_set = tmp_hwif->dma_host_set;
420 hwif->dma_setup = tmp_hwif->dma_setup;
421 hwif->dma_exec_cmd = tmp_hwif->dma_exec_cmd;
422 hwif->dma_start = tmp_hwif->dma_start;
423 hwif->ide_dma_end = tmp_hwif->ide_dma_end;
424 hwif->ide_dma_test_irq = tmp_hwif->ide_dma_test_irq;
425 hwif->ide_dma_clear_irq = tmp_hwif->ide_dma_clear_irq;
426 hwif->dma_lost_irq = tmp_hwif->dma_lost_irq;
427 hwif->dma_timeout = tmp_hwif->dma_timeout;
428
429 hwif->OUTB = tmp_hwif->OUTB;
430 hwif->OUTBSYNC = tmp_hwif->OUTBSYNC;
431 hwif->OUTW = tmp_hwif->OUTW;
432 hwif->OUTSW = tmp_hwif->OUTSW;
433 hwif->OUTSL = tmp_hwif->OUTSL;
434
435 hwif->INB = tmp_hwif->INB;
436 hwif->INW = tmp_hwif->INW;
437 hwif->INSW = tmp_hwif->INSW;
438 hwif->INSL = tmp_hwif->INSL;
439
440 hwif->sg_max_nents = tmp_hwif->sg_max_nents;
441
442 hwif->mmio = tmp_hwif->mmio;
443 hwif->rqsize = tmp_hwif->rqsize;
444
445 #ifndef CONFIG_BLK_DEV_IDECS
446 hwif->irq = tmp_hwif->irq;
447 #endif
448
449 hwif->dma_base = tmp_hwif->dma_base;
450 hwif->dma_command = tmp_hwif->dma_command;
451 hwif->dma_vendor1 = tmp_hwif->dma_vendor1;
452 hwif->dma_status = tmp_hwif->dma_status;
453 hwif->dma_vendor3 = tmp_hwif->dma_vendor3;
454 hwif->dma_prdtable = tmp_hwif->dma_prdtable;
455
456 hwif->config_data = tmp_hwif->config_data;
457 hwif->select_data = tmp_hwif->select_data;
458 hwif->extra_base = tmp_hwif->extra_base;
459 hwif->extra_ports = tmp_hwif->extra_ports;
460
461 hwif->hwif_data = tmp_hwif->hwif_data;
462 }
463
464 void ide_remove_port_from_hwgroup(ide_hwif_t *hwif)
465 {
466 ide_hwgroup_t *hwgroup = hwif->hwgroup;
467
468 spin_lock_irq(&ide_lock);
469 /*
470 * Remove us from the hwgroup, and free
471 * the hwgroup if we were the only member
472 */
473 if (hwif->next == hwif) {
474 BUG_ON(hwgroup->hwif != hwif);
475 kfree(hwgroup);
476 } else {
477 /* There is another interface in hwgroup.
478 * Unlink us, and set hwgroup->drive and ->hwif to
479 * something sane.
480 */
481 ide_hwif_t *g = hwgroup->hwif;
482
483 while (g->next != hwif)
484 g = g->next;
485 g->next = hwif->next;
486 if (hwgroup->hwif == hwif) {
487 /* Chose a random hwif for hwgroup->hwif.
488 * It's guaranteed that there are no drives
489 * left in the hwgroup.
490 */
491 BUG_ON(hwgroup->drive != NULL);
492 hwgroup->hwif = g;
493 }
494 BUG_ON(hwgroup->hwif == hwif);
495 }
496 spin_unlock_irq(&ide_lock);
497 }
498
499 /**
500 * ide_unregister - free an IDE interface
501 * @index: index of interface (will change soon to a pointer)
502 *
503 * Perform the final unregister of an IDE interface. At the moment
504 * we don't refcount interfaces so this will also get split up.
505 *
506 * Locking:
507 * The caller must not hold the IDE locks
508 * The drive present/vanishing is not yet properly locked
509 * Take care with the callbacks. These have been split to avoid
510 * deadlocking the IDE layer. The shutdown callback is called
511 * before we take the lock and free resources. It is up to the
512 * caller to be sure there is no pending I/O here, and that
513 * the interface will not be reopened (present/vanishing locking
514 * isn't yet done BTW). After we commit to the final kill we
515 * call the cleanup callback with the ide locks held.
516 *
517 * Unregister restores the hwif structures to the default state.
518 * This is raving bonkers.
519 */
520
521 void ide_unregister(unsigned int index)
522 {
523 ide_drive_t *drive;
524 ide_hwif_t *hwif, *g;
525 static ide_hwif_t tmp_hwif; /* protected by ide_cfg_mtx */
526 ide_hwgroup_t *hwgroup;
527 int irq_count = 0, unit;
528
529 BUG_ON(index >= MAX_HWIFS);
530
531 BUG_ON(in_interrupt());
532 BUG_ON(irqs_disabled());
533 mutex_lock(&ide_cfg_mtx);
534 spin_lock_irq(&ide_lock);
535 hwif = &ide_hwifs[index];
536 if (!hwif->present)
537 goto abort;
538 for (unit = 0; unit < MAX_DRIVES; ++unit) {
539 drive = &hwif->drives[unit];
540 if (!drive->present)
541 continue;
542 spin_unlock_irq(&ide_lock);
543 device_unregister(&drive->gendev);
544 wait_for_completion(&drive->gendev_rel_comp);
545 spin_lock_irq(&ide_lock);
546 }
547 hwif->present = 0;
548
549 spin_unlock_irq(&ide_lock);
550
551 ide_proc_unregister_port(hwif);
552
553 hwgroup = hwif->hwgroup;
554 /*
555 * free the irq if we were the only hwif using it
556 */
557 g = hwgroup->hwif;
558 do {
559 if (g->irq == hwif->irq)
560 ++irq_count;
561 g = g->next;
562 } while (g != hwgroup->hwif);
563 if (irq_count == 1)
564 free_irq(hwif->irq, hwgroup);
565
566 ide_remove_port_from_hwgroup(hwif);
567
568 device_unregister(&hwif->gendev);
569 wait_for_completion(&hwif->gendev_rel_comp);
570
571 /*
572 * Remove us from the kernel's knowledge
573 */
574 blk_unregister_region(MKDEV(hwif->major, 0), MAX_DRIVES<<PARTN_BITS);
575 kfree(hwif->sg_table);
576 unregister_blkdev(hwif->major, hwif->name);
577 spin_lock_irq(&ide_lock);
578
579 if (hwif->dma_base) {
580 (void) ide_release_dma(hwif);
581
582 hwif->dma_base = 0;
583 hwif->dma_command = 0;
584 hwif->dma_vendor1 = 0;
585 hwif->dma_status = 0;
586 hwif->dma_vendor3 = 0;
587 hwif->dma_prdtable = 0;
588
589 hwif->extra_base = 0;
590 hwif->extra_ports = 0;
591 }
592
593 /*
594 * Note that we only release the standard ports,
595 * and do not even try to handle any extra ports
596 * allocated for weird IDE interface chipsets.
597 */
598 ide_hwif_release_regions(hwif);
599
600 /* copy original settings */
601 tmp_hwif = *hwif;
602
603 /* restore hwif data to pristine status */
604 ide_init_port_data(hwif, index);
605 init_hwif_default(hwif, index);
606
607 ide_hwif_restore(hwif, &tmp_hwif);
608
609 abort:
610 spin_unlock_irq(&ide_lock);
611 mutex_unlock(&ide_cfg_mtx);
612 }
613
614 EXPORT_SYMBOL(ide_unregister);
615
616
617 /**
618 * ide_setup_ports - set up IDE interface ports
619 * @hw: register descriptions
620 * @base: base register
621 * @offsets: table of register offsets
622 * @ctrl: control register
623 * @ack_irq: IRQ ack
624 * @irq: interrupt lie
625 *
626 * Setup hw_regs_t structure described by parameters. You
627 * may set up the hw structure yourself OR use this routine to
628 * do it for you. This is basically a helper
629 *
630 */
631
632 void ide_setup_ports ( hw_regs_t *hw,
633 unsigned long base, int *offsets,
634 unsigned long ctrl, unsigned long intr,
635 ide_ack_intr_t *ack_intr,
636 /*
637 * ide_io_ops_t *iops,
638 */
639 int irq)
640 {
641 int i;
642
643 memset(hw, 0, sizeof(hw_regs_t));
644 for (i = 0; i < IDE_NR_PORTS; i++) {
645 if (offsets[i] == -1) {
646 switch(i) {
647 case IDE_CONTROL_OFFSET:
648 hw->io_ports[i] = ctrl;
649 break;
650 #if defined(CONFIG_AMIGA) || defined(CONFIG_MAC)
651 case IDE_IRQ_OFFSET:
652 hw->io_ports[i] = intr;
653 break;
654 #endif /* (CONFIG_AMIGA) || (CONFIG_MAC) */
655 default:
656 hw->io_ports[i] = 0;
657 break;
658 }
659 } else {
660 hw->io_ports[i] = base + offsets[i];
661 }
662 }
663 hw->irq = irq;
664 hw->ack_intr = ack_intr;
665 /*
666 * hw->iops = iops;
667 */
668 }
669
670 void ide_init_port_hw(ide_hwif_t *hwif, hw_regs_t *hw)
671 {
672 memcpy(hwif->io_ports, hw->io_ports, sizeof(hwif->io_ports));
673 hwif->irq = hw->irq;
674 hwif->noprobe = 0;
675 hwif->chipset = hw->chipset;
676 hwif->gendev.parent = hw->dev;
677 hwif->ack_intr = hw->ack_intr;
678 }
679 EXPORT_SYMBOL_GPL(ide_init_port_hw);
680
681 /**
682 * ide_register_hw - register IDE interface
683 * @hw: hardware registers
684 * @quirkproc: quirkproc function
685 * @hwifp: pointer to returned hwif
686 *
687 * Register an IDE interface, specifying exactly the registers etc.
688 *
689 * Returns -1 on error.
690 */
691
692 int ide_register_hw(hw_regs_t *hw, void (*quirkproc)(ide_drive_t *),
693 ide_hwif_t **hwifp)
694 {
695 int index, retry = 1;
696 ide_hwif_t *hwif;
697 u8 idx[4] = { 0xff, 0xff, 0xff, 0xff };
698
699 do {
700 for (index = 0; index < MAX_HWIFS; ++index) {
701 hwif = &ide_hwifs[index];
702 if (hwif->io_ports[IDE_DATA_OFFSET] == hw->io_ports[IDE_DATA_OFFSET])
703 goto found;
704 }
705 for (index = 0; index < MAX_HWIFS; ++index) {
706 hwif = &ide_hwifs[index];
707 if (hwif->hold)
708 continue;
709 if (!hwif->present && hwif->mate == NULL)
710 goto found;
711 }
712 for (index = 0; index < MAX_HWIFS; index++)
713 ide_unregister(index);
714 } while (retry--);
715 return -1;
716 found:
717 if (hwif->present)
718 ide_unregister(index);
719 else if (!hwif->hold)
720 ide_init_port_data(hwif, index);
721
722 ide_init_port_hw(hwif, hw);
723 hwif->quirkproc = quirkproc;
724
725 idx[0] = index;
726
727 ide_device_add(idx, NULL);
728
729 if (hwifp)
730 *hwifp = hwif;
731
732 return hwif->present ? index : -1;
733 }
734
735 EXPORT_SYMBOL(ide_register_hw);
736
737 /*
738 * Locks for IDE setting functionality
739 */
740
741 DEFINE_MUTEX(ide_setting_mtx);
742
743 EXPORT_SYMBOL_GPL(ide_setting_mtx);
744
745 /**
746 * ide_spin_wait_hwgroup - wait for group
747 * @drive: drive in the group
748 *
749 * Wait for an IDE device group to go non busy and then return
750 * holding the ide_lock which guards the hwgroup->busy status
751 * and right to use it.
752 */
753
754 int ide_spin_wait_hwgroup (ide_drive_t *drive)
755 {
756 ide_hwgroup_t *hwgroup = HWGROUP(drive);
757 unsigned long timeout = jiffies + (3 * HZ);
758
759 spin_lock_irq(&ide_lock);
760
761 while (hwgroup->busy) {
762 unsigned long lflags;
763 spin_unlock_irq(&ide_lock);
764 local_irq_set(lflags);
765 if (time_after(jiffies, timeout)) {
766 local_irq_restore(lflags);
767 printk(KERN_ERR "%s: channel busy\n", drive->name);
768 return -EBUSY;
769 }
770 local_irq_restore(lflags);
771 spin_lock_irq(&ide_lock);
772 }
773 return 0;
774 }
775
776 EXPORT_SYMBOL(ide_spin_wait_hwgroup);
777
778 int set_io_32bit(ide_drive_t *drive, int arg)
779 {
780 if (drive->no_io_32bit)
781 return -EPERM;
782
783 if (arg < 0 || arg > 1 + (SUPPORT_VLB_SYNC << 1))
784 return -EINVAL;
785
786 if (ide_spin_wait_hwgroup(drive))
787 return -EBUSY;
788
789 drive->io_32bit = arg;
790
791 spin_unlock_irq(&ide_lock);
792
793 return 0;
794 }
795
796 static int set_ksettings(ide_drive_t *drive, int arg)
797 {
798 if (arg < 0 || arg > 1)
799 return -EINVAL;
800
801 if (ide_spin_wait_hwgroup(drive))
802 return -EBUSY;
803 drive->keep_settings = arg;
804 spin_unlock_irq(&ide_lock);
805
806 return 0;
807 }
808
809 int set_using_dma(ide_drive_t *drive, int arg)
810 {
811 #ifdef CONFIG_BLK_DEV_IDEDMA
812 ide_hwif_t *hwif = drive->hwif;
813 int err = -EPERM;
814
815 if (arg < 0 || arg > 1)
816 return -EINVAL;
817
818 if (!drive->id || !(drive->id->capability & 1))
819 goto out;
820
821 if (hwif->dma_host_set == NULL)
822 goto out;
823
824 err = -EBUSY;
825 if (ide_spin_wait_hwgroup(drive))
826 goto out;
827 /*
828 * set ->busy flag, unlock and let it ride
829 */
830 hwif->hwgroup->busy = 1;
831 spin_unlock_irq(&ide_lock);
832
833 err = 0;
834
835 if (arg) {
836 if (ide_set_dma(drive))
837 err = -EIO;
838 } else
839 ide_dma_off(drive);
840
841 /*
842 * lock, clear ->busy flag and unlock before leaving
843 */
844 spin_lock_irq(&ide_lock);
845 hwif->hwgroup->busy = 0;
846 spin_unlock_irq(&ide_lock);
847 out:
848 return err;
849 #else
850 if (arg < 0 || arg > 1)
851 return -EINVAL;
852
853 return -EPERM;
854 #endif
855 }
856
857 int set_pio_mode(ide_drive_t *drive, int arg)
858 {
859 struct request rq;
860
861 if (arg < 0 || arg > 255)
862 return -EINVAL;
863
864 if (drive->hwif->set_pio_mode == NULL)
865 return -ENOSYS;
866
867 if (drive->special.b.set_tune)
868 return -EBUSY;
869
870 ide_init_drive_cmd(&rq);
871 rq.cmd_type = REQ_TYPE_ATA_TASKFILE;
872
873 drive->tune_req = (u8) arg;
874 drive->special.b.set_tune = 1;
875 (void) ide_do_drive_cmd(drive, &rq, ide_wait);
876 return 0;
877 }
878
879 static int set_unmaskirq(ide_drive_t *drive, int arg)
880 {
881 if (drive->no_unmask)
882 return -EPERM;
883
884 if (arg < 0 || arg > 1)
885 return -EINVAL;
886
887 if (ide_spin_wait_hwgroup(drive))
888 return -EBUSY;
889 drive->unmask = arg;
890 spin_unlock_irq(&ide_lock);
891
892 return 0;
893 }
894
895 /**
896 * system_bus_clock - clock guess
897 *
898 * External version of the bus clock guess used by very old IDE drivers
899 * for things like VLB timings. Should not be used.
900 */
901
902 int system_bus_clock (void)
903 {
904 return system_bus_speed;
905 }
906
907 EXPORT_SYMBOL(system_bus_clock);
908
909 static int generic_ide_suspend(struct device *dev, pm_message_t mesg)
910 {
911 ide_drive_t *drive = dev->driver_data;
912 ide_hwif_t *hwif = HWIF(drive);
913 struct request rq;
914 struct request_pm_state rqpm;
915 ide_task_t args;
916 int ret;
917
918 /* Call ACPI _GTM only once */
919 if (!(drive->dn % 2))
920 ide_acpi_get_timing(hwif);
921
922 memset(&rq, 0, sizeof(rq));
923 memset(&rqpm, 0, sizeof(rqpm));
924 memset(&args, 0, sizeof(args));
925 rq.cmd_type = REQ_TYPE_PM_SUSPEND;
926 rq.special = &args;
927 rq.data = &rqpm;
928 rqpm.pm_step = ide_pm_state_start_suspend;
929 if (mesg.event == PM_EVENT_PRETHAW)
930 mesg.event = PM_EVENT_FREEZE;
931 rqpm.pm_state = mesg.event;
932
933 ret = ide_do_drive_cmd(drive, &rq, ide_wait);
934 /* only call ACPI _PS3 after both drivers are suspended */
935 if (!ret && (((drive->dn % 2) && hwif->drives[0].present
936 && hwif->drives[1].present)
937 || !hwif->drives[0].present
938 || !hwif->drives[1].present))
939 ide_acpi_set_state(hwif, 0);
940 return ret;
941 }
942
943 static int generic_ide_resume(struct device *dev)
944 {
945 ide_drive_t *drive = dev->driver_data;
946 ide_hwif_t *hwif = HWIF(drive);
947 struct request rq;
948 struct request_pm_state rqpm;
949 ide_task_t args;
950 int err;
951
952 /* Call ACPI _STM only once */
953 if (!(drive->dn % 2)) {
954 ide_acpi_set_state(hwif, 1);
955 ide_acpi_push_timing(hwif);
956 }
957
958 ide_acpi_exec_tfs(drive);
959
960 memset(&rq, 0, sizeof(rq));
961 memset(&rqpm, 0, sizeof(rqpm));
962 memset(&args, 0, sizeof(args));
963 rq.cmd_type = REQ_TYPE_PM_RESUME;
964 rq.special = &args;
965 rq.data = &rqpm;
966 rqpm.pm_step = ide_pm_state_start_resume;
967 rqpm.pm_state = PM_EVENT_ON;
968
969 err = ide_do_drive_cmd(drive, &rq, ide_head_wait);
970
971 if (err == 0 && dev->driver) {
972 ide_driver_t *drv = to_ide_driver(dev->driver);
973
974 if (drv->resume)
975 drv->resume(drive);
976 }
977
978 return err;
979 }
980
981 int generic_ide_ioctl(ide_drive_t *drive, struct file *file, struct block_device *bdev,
982 unsigned int cmd, unsigned long arg)
983 {
984 unsigned long flags;
985 ide_driver_t *drv;
986 void __user *p = (void __user *)arg;
987 int err = 0, (*setfunc)(ide_drive_t *, int);
988 u8 *val;
989
990 switch (cmd) {
991 case HDIO_GET_32BIT: val = &drive->io_32bit; goto read_val;
992 case HDIO_GET_KEEPSETTINGS: val = &drive->keep_settings; goto read_val;
993 case HDIO_GET_UNMASKINTR: val = &drive->unmask; goto read_val;
994 case HDIO_GET_DMA: val = &drive->using_dma; goto read_val;
995 case HDIO_SET_32BIT: setfunc = set_io_32bit; goto set_val;
996 case HDIO_SET_KEEPSETTINGS: setfunc = set_ksettings; goto set_val;
997 case HDIO_SET_PIO_MODE: setfunc = set_pio_mode; goto set_val;
998 case HDIO_SET_UNMASKINTR: setfunc = set_unmaskirq; goto set_val;
999 case HDIO_SET_DMA: setfunc = set_using_dma; goto set_val;
1000 }
1001
1002 switch (cmd) {
1003 case HDIO_OBSOLETE_IDENTITY:
1004 case HDIO_GET_IDENTITY:
1005 if (bdev != bdev->bd_contains)
1006 return -EINVAL;
1007 if (drive->id_read == 0)
1008 return -ENOMSG;
1009 if (copy_to_user(p, drive->id, (cmd == HDIO_GET_IDENTITY) ? sizeof(*drive->id) : 142))
1010 return -EFAULT;
1011 return 0;
1012
1013 case HDIO_GET_NICE:
1014 return put_user(drive->dsc_overlap << IDE_NICE_DSC_OVERLAP |
1015 drive->atapi_overlap << IDE_NICE_ATAPI_OVERLAP |
1016 drive->nice0 << IDE_NICE_0 |
1017 drive->nice1 << IDE_NICE_1 |
1018 drive->nice2 << IDE_NICE_2,
1019 (long __user *) arg);
1020
1021 #ifdef CONFIG_IDE_TASK_IOCTL
1022 case HDIO_DRIVE_TASKFILE:
1023 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
1024 return -EACCES;
1025 switch(drive->media) {
1026 case ide_disk:
1027 return ide_taskfile_ioctl(drive, cmd, arg);
1028 default:
1029 return -ENOMSG;
1030 }
1031 #endif /* CONFIG_IDE_TASK_IOCTL */
1032
1033 case HDIO_DRIVE_CMD:
1034 if (!capable(CAP_SYS_RAWIO))
1035 return -EACCES;
1036 return ide_cmd_ioctl(drive, cmd, arg);
1037
1038 case HDIO_DRIVE_TASK:
1039 if (!capable(CAP_SYS_RAWIO))
1040 return -EACCES;
1041 return ide_task_ioctl(drive, cmd, arg);
1042
1043 case HDIO_SCAN_HWIF:
1044 {
1045 hw_regs_t hw;
1046 int args[3];
1047 if (!capable(CAP_SYS_RAWIO)) return -EACCES;
1048 if (copy_from_user(args, p, 3 * sizeof(int)))
1049 return -EFAULT;
1050 memset(&hw, 0, sizeof(hw));
1051 ide_init_hwif_ports(&hw, (unsigned long) args[0],
1052 (unsigned long) args[1], NULL);
1053 hw.irq = args[2];
1054 if (ide_register_hw(&hw, NULL, NULL) == -1)
1055 return -EIO;
1056 return 0;
1057 }
1058 case HDIO_UNREGISTER_HWIF:
1059 if (!capable(CAP_SYS_RAWIO)) return -EACCES;
1060 /* (arg > MAX_HWIFS) checked in function */
1061 ide_unregister(arg);
1062 return 0;
1063 case HDIO_SET_NICE:
1064 if (!capable(CAP_SYS_ADMIN)) return -EACCES;
1065 if (arg != (arg & ((1 << IDE_NICE_DSC_OVERLAP) | (1 << IDE_NICE_1))))
1066 return -EPERM;
1067 drive->dsc_overlap = (arg >> IDE_NICE_DSC_OVERLAP) & 1;
1068 drv = *(ide_driver_t **)bdev->bd_disk->private_data;
1069 if (drive->dsc_overlap && !drv->supports_dsc_overlap) {
1070 drive->dsc_overlap = 0;
1071 return -EPERM;
1072 }
1073 drive->nice1 = (arg >> IDE_NICE_1) & 1;
1074 return 0;
1075 case HDIO_DRIVE_RESET:
1076 {
1077 unsigned long flags;
1078 if (!capable(CAP_SYS_ADMIN)) return -EACCES;
1079
1080 /*
1081 * Abort the current command on the
1082 * group if there is one, taking
1083 * care not to allow anything else
1084 * to be queued and to die on the
1085 * spot if we miss one somehow
1086 */
1087
1088 spin_lock_irqsave(&ide_lock, flags);
1089
1090 if (HWGROUP(drive)->resetting) {
1091 spin_unlock_irqrestore(&ide_lock, flags);
1092 return -EBUSY;
1093 }
1094
1095 ide_abort(drive, "drive reset");
1096
1097 BUG_ON(HWGROUP(drive)->handler);
1098
1099 /* Ensure nothing gets queued after we
1100 drop the lock. Reset will clear the busy */
1101
1102 HWGROUP(drive)->busy = 1;
1103 spin_unlock_irqrestore(&ide_lock, flags);
1104 (void) ide_do_reset(drive);
1105
1106 return 0;
1107 }
1108
1109 case HDIO_GET_BUSSTATE:
1110 if (!capable(CAP_SYS_ADMIN))
1111 return -EACCES;
1112 if (put_user(HWIF(drive)->bus_state, (long __user *)arg))
1113 return -EFAULT;
1114 return 0;
1115
1116 case HDIO_SET_BUSSTATE:
1117 if (!capable(CAP_SYS_ADMIN))
1118 return -EACCES;
1119 if (HWIF(drive)->busproc)
1120 return HWIF(drive)->busproc(drive, (int)arg);
1121 return -EOPNOTSUPP;
1122 default:
1123 return -EINVAL;
1124 }
1125
1126 read_val:
1127 mutex_lock(&ide_setting_mtx);
1128 spin_lock_irqsave(&ide_lock, flags);
1129 err = *val;
1130 spin_unlock_irqrestore(&ide_lock, flags);
1131 mutex_unlock(&ide_setting_mtx);
1132 return err >= 0 ? put_user(err, (long __user *)arg) : err;
1133
1134 set_val:
1135 if (bdev != bdev->bd_contains)
1136 err = -EINVAL;
1137 else {
1138 if (!capable(CAP_SYS_ADMIN))
1139 err = -EACCES;
1140 else {
1141 mutex_lock(&ide_setting_mtx);
1142 err = setfunc(drive, arg);
1143 mutex_unlock(&ide_setting_mtx);
1144 }
1145 }
1146 return err;
1147 }
1148
1149 EXPORT_SYMBOL(generic_ide_ioctl);
1150
1151 /*
1152 * stridx() returns the offset of c within s,
1153 * or -1 if c is '\0' or not found within s.
1154 */
1155 static int __init stridx (const char *s, char c)
1156 {
1157 char *i = strchr(s, c);
1158 return (i && c) ? i - s : -1;
1159 }
1160
1161 /*
1162 * match_parm() does parsing for ide_setup():
1163 *
1164 * 1. the first char of s must be '='.
1165 * 2. if the remainder matches one of the supplied keywords,
1166 * the index (1 based) of the keyword is negated and returned.
1167 * 3. if the remainder is a series of no more than max_vals numbers
1168 * separated by commas, the numbers are saved in vals[] and a
1169 * count of how many were saved is returned. Base10 is assumed,
1170 * and base16 is allowed when prefixed with "0x".
1171 * 4. otherwise, zero is returned.
1172 */
1173 static int __init match_parm (char *s, const char *keywords[], int vals[], int max_vals)
1174 {
1175 static const char *decimal = "0123456789";
1176 static const char *hex = "0123456789abcdef";
1177 int i, n;
1178
1179 if (*s++ == '=') {
1180 /*
1181 * Try matching against the supplied keywords,
1182 * and return -(index+1) if we match one
1183 */
1184 if (keywords != NULL) {
1185 for (i = 0; *keywords != NULL; ++i) {
1186 if (!strcmp(s, *keywords++))
1187 return -(i+1);
1188 }
1189 }
1190 /*
1191 * Look for a series of no more than "max_vals"
1192 * numeric values separated by commas, in base10,
1193 * or base16 when prefixed with "0x".
1194 * Return a count of how many were found.
1195 */
1196 for (n = 0; (i = stridx(decimal, *s)) >= 0;) {
1197 vals[n] = i;
1198 while ((i = stridx(decimal, *++s)) >= 0)
1199 vals[n] = (vals[n] * 10) + i;
1200 if (*s == 'x' && !vals[n]) {
1201 while ((i = stridx(hex, *++s)) >= 0)
1202 vals[n] = (vals[n] * 0x10) + i;
1203 }
1204 if (++n == max_vals)
1205 break;
1206 if (*s == ',' || *s == ';')
1207 ++s;
1208 }
1209 if (!*s)
1210 return n;
1211 }
1212 return 0; /* zero = nothing matched */
1213 }
1214
1215 extern int probe_ali14xx;
1216 extern int probe_umc8672;
1217 extern int probe_dtc2278;
1218 extern int probe_ht6560b;
1219 extern int probe_qd65xx;
1220 extern int cmd640_vlb;
1221
1222 static int __initdata is_chipset_set[MAX_HWIFS];
1223
1224 /*
1225 * ide_setup() gets called VERY EARLY during initialization,
1226 * to handle kernel "command line" strings beginning with "hdx=" or "ide".
1227 *
1228 * Remember to update Documentation/ide.txt if you change something here.
1229 */
1230 static int __init ide_setup(char *s)
1231 {
1232 int i, vals[3];
1233 ide_hwif_t *hwif;
1234 ide_drive_t *drive;
1235 unsigned int hw, unit;
1236 const char max_drive = 'a' + ((MAX_HWIFS * MAX_DRIVES) - 1);
1237 const char max_hwif = '0' + (MAX_HWIFS - 1);
1238
1239
1240 if (strncmp(s,"hd",2) == 0 && s[2] == '=') /* hd= is for hd.c */
1241 return 0; /* driver and not us */
1242
1243 if (strncmp(s,"ide",3) && strncmp(s,"idebus",6) && strncmp(s,"hd",2))
1244 return 0;
1245
1246 printk(KERN_INFO "ide_setup: %s", s);
1247 init_ide_data ();
1248
1249 #ifdef CONFIG_BLK_DEV_IDEDOUBLER
1250 if (!strcmp(s, "ide=doubler")) {
1251 extern int ide_doubler;
1252
1253 printk(" : Enabled support for IDE doublers\n");
1254 ide_doubler = 1;
1255 return 1;
1256 }
1257 #endif /* CONFIG_BLK_DEV_IDEDOUBLER */
1258
1259 if (!strcmp(s, "ide=nodma")) {
1260 printk(" : Prevented DMA\n");
1261 noautodma = 1;
1262 goto obsolete_option;
1263 }
1264
1265 #ifdef CONFIG_IDEPCI_PCIBUS_ORDER
1266 if (!strcmp(s, "ide=reverse")) {
1267 ide_scan_direction = 1;
1268 printk(" : Enabled support for IDE inverse scan order.\n");
1269 return 1;
1270 }
1271 #endif
1272
1273 #ifdef CONFIG_BLK_DEV_IDEACPI
1274 if (!strcmp(s, "ide=noacpi")) {
1275 //printk(" : Disable IDE ACPI support.\n");
1276 ide_noacpi = 1;
1277 return 1;
1278 }
1279 if (!strcmp(s, "ide=acpigtf")) {
1280 //printk(" : Enable IDE ACPI _GTF support.\n");
1281 ide_noacpitfs = 0;
1282 return 1;
1283 }
1284 if (!strcmp(s, "ide=acpionboot")) {
1285 //printk(" : Call IDE ACPI methods on boot.\n");
1286 ide_noacpionboot = 0;
1287 return 1;
1288 }
1289 #endif /* CONFIG_BLK_DEV_IDEACPI */
1290
1291 /*
1292 * Look for drive options: "hdx="
1293 */
1294 if (s[0] == 'h' && s[1] == 'd' && s[2] >= 'a' && s[2] <= max_drive) {
1295 const char *hd_words[] = {
1296 "none", "noprobe", "nowerr", "cdrom", "nodma",
1297 "autotune", "noautotune", "-8", "-9", "-10",
1298 "noflush", "remap", "remap63", "scsi", NULL };
1299 unit = s[2] - 'a';
1300 hw = unit / MAX_DRIVES;
1301 unit = unit % MAX_DRIVES;
1302 hwif = &ide_hwifs[hw];
1303 drive = &hwif->drives[unit];
1304 if (strncmp(s + 4, "ide-", 4) == 0) {
1305 strlcpy(drive->driver_req, s + 4, sizeof(drive->driver_req));
1306 goto done;
1307 }
1308 switch (match_parm(&s[3], hd_words, vals, 3)) {
1309 case -1: /* "none" */
1310 case -2: /* "noprobe" */
1311 drive->noprobe = 1;
1312 goto done;
1313 case -3: /* "nowerr" */
1314 drive->bad_wstat = BAD_R_STAT;
1315 hwif->noprobe = 0;
1316 goto done;
1317 case -4: /* "cdrom" */
1318 drive->present = 1;
1319 drive->media = ide_cdrom;
1320 /* an ATAPI device ignores DRDY */
1321 drive->ready_stat = 0;
1322 hwif->noprobe = 0;
1323 goto done;
1324 case -5: /* nodma */
1325 drive->nodma = 1;
1326 goto done;
1327 case -6: /* "autotune" */
1328 drive->autotune = IDE_TUNE_AUTO;
1329 goto obsolete_option;
1330 case -7: /* "noautotune" */
1331 drive->autotune = IDE_TUNE_NOAUTO;
1332 goto obsolete_option;
1333 case -11: /* noflush */
1334 drive->noflush = 1;
1335 goto done;
1336 case -12: /* "remap" */
1337 drive->remap_0_to_1 = 1;
1338 goto done;
1339 case -13: /* "remap63" */
1340 drive->sect0 = 63;
1341 goto done;
1342 case -14: /* "scsi" */
1343 drive->scsi = 1;
1344 goto done;
1345 case 3: /* cyl,head,sect */
1346 drive->media = ide_disk;
1347 drive->ready_stat = READY_STAT;
1348 drive->cyl = drive->bios_cyl = vals[0];
1349 drive->head = drive->bios_head = vals[1];
1350 drive->sect = drive->bios_sect = vals[2];
1351 drive->present = 1;
1352 drive->forced_geom = 1;
1353 hwif->noprobe = 0;
1354 goto done;
1355 default:
1356 goto bad_option;
1357 }
1358 }
1359
1360 if (s[0] != 'i' || s[1] != 'd' || s[2] != 'e')
1361 goto bad_option;
1362 /*
1363 * Look for bus speed option: "idebus="
1364 */
1365 if (s[3] == 'b' && s[4] == 'u' && s[5] == 's') {
1366 if (match_parm(&s[6], NULL, vals, 1) != 1)
1367 goto bad_option;
1368 if (vals[0] >= 20 && vals[0] <= 66) {
1369 idebus_parameter = vals[0];
1370 } else
1371 printk(" -- BAD BUS SPEED! Expected value from 20 to 66");
1372 goto done;
1373 }
1374 /*
1375 * Look for interface options: "idex="
1376 */
1377 if (s[3] >= '0' && s[3] <= max_hwif) {
1378 /*
1379 * Be VERY CAREFUL changing this: note hardcoded indexes below
1380 * (-8, -9, -10) are reserved to ease the hardcoding.
1381 */
1382 static const char *ide_words[] = {
1383 "noprobe", "serialize", "minus3", "minus4",
1384 "reset", "minus6", "ata66", "minus8", "minus9",
1385 "minus10", "four", "qd65xx", "ht6560b", "cmd640_vlb",
1386 "dtc2278", "umc8672", "ali14xx", NULL };
1387
1388 hw_regs_t hwregs;
1389
1390 hw = s[3] - '0';
1391 hwif = &ide_hwifs[hw];
1392 i = match_parm(&s[4], ide_words, vals, 3);
1393
1394 /*
1395 * Cryptic check to ensure chipset not already set for hwif.
1396 * Note: we can't depend on hwif->chipset here.
1397 */
1398 if ((i >= -18 && i <= -11) || (i > 0 && i <= 3)) {
1399 /* chipset already specified */
1400 if (is_chipset_set[hw])
1401 goto bad_option;
1402 if (i > -18 && i <= -11) {
1403 /* these drivers are for "ide0=" only */
1404 if (hw != 0)
1405 goto bad_hwif;
1406 /* chipset already specified for 2nd port */
1407 if (is_chipset_set[hw+1])
1408 goto bad_option;
1409 }
1410 is_chipset_set[hw] = 1;
1411 printk("\n");
1412 }
1413
1414 switch (i) {
1415 #ifdef CONFIG_BLK_DEV_ALI14XX
1416 case -17: /* "ali14xx" */
1417 probe_ali14xx = 1;
1418 goto done;
1419 #endif
1420 #ifdef CONFIG_BLK_DEV_UMC8672
1421 case -16: /* "umc8672" */
1422 probe_umc8672 = 1;
1423 goto done;
1424 #endif
1425 #ifdef CONFIG_BLK_DEV_DTC2278
1426 case -15: /* "dtc2278" */
1427 probe_dtc2278 = 1;
1428 goto done;
1429 #endif
1430 #ifdef CONFIG_BLK_DEV_CMD640
1431 case -14: /* "cmd640_vlb" */
1432 cmd640_vlb = 1;
1433 goto done;
1434 #endif
1435 #ifdef CONFIG_BLK_DEV_HT6560B
1436 case -13: /* "ht6560b" */
1437 probe_ht6560b = 1;
1438 goto done;
1439 #endif
1440 #ifdef CONFIG_BLK_DEV_QD65XX
1441 case -12: /* "qd65xx" */
1442 probe_qd65xx = 1;
1443 goto done;
1444 #endif
1445 #ifdef CONFIG_BLK_DEV_4DRIVES
1446 case -11: /* "four" drives on one set of ports */
1447 {
1448 ide_hwif_t *mate = &ide_hwifs[hw^1];
1449 mate->drives[0].select.all ^= 0x20;
1450 mate->drives[1].select.all ^= 0x20;
1451 hwif->chipset = mate->chipset = ide_4drives;
1452 mate->irq = hwif->irq;
1453 memcpy(mate->io_ports, hwif->io_ports, sizeof(hwif->io_ports));
1454 hwif->mate = mate;
1455 mate->mate = hwif;
1456 hwif->serialized = mate->serialized = 1;
1457 goto obsolete_option;
1458 }
1459 #endif /* CONFIG_BLK_DEV_4DRIVES */
1460 case -10: /* minus10 */
1461 case -9: /* minus9 */
1462 case -8: /* minus8 */
1463 case -6:
1464 case -4:
1465 case -3:
1466 goto bad_option;
1467 case -7: /* ata66 */
1468 #ifdef CONFIG_BLK_DEV_IDEPCI
1469 /*
1470 * Use ATA_CBL_PATA40_SHORT so drive side
1471 * cable detection is also overriden.
1472 */
1473 hwif->cbl = ATA_CBL_PATA40_SHORT;
1474 goto obsolete_option;
1475 #else
1476 goto bad_hwif;
1477 #endif
1478 case -5: /* "reset" */
1479 hwif->reset = 1;
1480 goto obsolete_option;
1481 case -2: /* "serialize" */
1482 hwif->mate = &ide_hwifs[hw^1];
1483 hwif->mate->mate = hwif;
1484 hwif->serialized = hwif->mate->serialized = 1;
1485 goto obsolete_option;
1486
1487 case -1: /* "noprobe" */
1488 hwif->noprobe = 1;
1489 goto done;
1490
1491 case 1: /* base */
1492 vals[1] = vals[0] + 0x206; /* default ctl */
1493 case 2: /* base,ctl */
1494 vals[2] = 0; /* default irq = probe for it */
1495 case 3: /* base,ctl,irq */
1496 memset(&hwregs, 0, sizeof(hwregs));
1497 ide_init_hwif_ports(&hwregs, vals[0], vals[1], &hwif->irq);
1498 memcpy(hwif->io_ports, hwregs.io_ports, sizeof(hwif->io_ports));
1499 hwif->irq = vals[2];
1500 hwif->noprobe = 0;
1501 hwif->chipset = ide_forced;
1502 goto obsolete_option;
1503
1504 case 0: goto bad_option;
1505 default:
1506 printk(" -- SUPPORT NOT CONFIGURED IN THIS KERNEL\n");
1507 return 1;
1508 }
1509 }
1510 bad_option:
1511 printk(" -- BAD OPTION\n");
1512 return 1;
1513 obsolete_option:
1514 printk(" -- OBSOLETE OPTION, WILL BE REMOVED SOON!\n");
1515 return 1;
1516 bad_hwif:
1517 printk("-- NOT SUPPORTED ON ide%d", hw);
1518 done:
1519 printk("\n");
1520 return 1;
1521 }
1522
1523 EXPORT_SYMBOL(ide_lock);
1524
1525 static int ide_bus_match(struct device *dev, struct device_driver *drv)
1526 {
1527 return 1;
1528 }
1529
1530 static char *media_string(ide_drive_t *drive)
1531 {
1532 switch (drive->media) {
1533 case ide_disk:
1534 return "disk";
1535 case ide_cdrom:
1536 return "cdrom";
1537 case ide_tape:
1538 return "tape";
1539 case ide_floppy:
1540 return "floppy";
1541 case ide_optical:
1542 return "optical";
1543 default:
1544 return "UNKNOWN";
1545 }
1546 }
1547
1548 static ssize_t media_show(struct device *dev, struct device_attribute *attr, char *buf)
1549 {
1550 ide_drive_t *drive = to_ide_device(dev);
1551 return sprintf(buf, "%s\n", media_string(drive));
1552 }
1553
1554 static ssize_t drivename_show(struct device *dev, struct device_attribute *attr, char *buf)
1555 {
1556 ide_drive_t *drive = to_ide_device(dev);
1557 return sprintf(buf, "%s\n", drive->name);
1558 }
1559
1560 static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf)
1561 {
1562 ide_drive_t *drive = to_ide_device(dev);
1563 return sprintf(buf, "ide:m-%s\n", media_string(drive));
1564 }
1565
1566 static ssize_t model_show(struct device *dev, struct device_attribute *attr,
1567 char *buf)
1568 {
1569 ide_drive_t *drive = to_ide_device(dev);
1570 return sprintf(buf, "%s\n", drive->id->model);
1571 }
1572
1573 static ssize_t firmware_show(struct device *dev, struct device_attribute *attr,
1574 char *buf)
1575 {
1576 ide_drive_t *drive = to_ide_device(dev);
1577 return sprintf(buf, "%s\n", drive->id->fw_rev);
1578 }
1579
1580 static ssize_t serial_show(struct device *dev, struct device_attribute *attr,
1581 char *buf)
1582 {
1583 ide_drive_t *drive = to_ide_device(dev);
1584 return sprintf(buf, "%s\n", drive->id->serial_no);
1585 }
1586
1587 static struct device_attribute ide_dev_attrs[] = {
1588 __ATTR_RO(media),
1589 __ATTR_RO(drivename),
1590 __ATTR_RO(modalias),
1591 __ATTR_RO(model),
1592 __ATTR_RO(firmware),
1593 __ATTR(serial, 0400, serial_show, NULL),
1594 __ATTR_NULL
1595 };
1596
1597 static int ide_uevent(struct device *dev, struct kobj_uevent_env *env)
1598 {
1599 ide_drive_t *drive = to_ide_device(dev);
1600
1601 add_uevent_var(env, "MEDIA=%s", media_string(drive));
1602 add_uevent_var(env, "DRIVENAME=%s", drive->name);
1603 add_uevent_var(env, "MODALIAS=ide:m-%s", media_string(drive));
1604 return 0;
1605 }
1606
1607 static int generic_ide_probe(struct device *dev)
1608 {
1609 ide_drive_t *drive = to_ide_device(dev);
1610 ide_driver_t *drv = to_ide_driver(dev->driver);
1611
1612 return drv->probe ? drv->probe(drive) : -ENODEV;
1613 }
1614
1615 static int generic_ide_remove(struct device *dev)
1616 {
1617 ide_drive_t *drive = to_ide_device(dev);
1618 ide_driver_t *drv = to_ide_driver(dev->driver);
1619
1620 if (drv->remove)
1621 drv->remove(drive);
1622
1623 return 0;
1624 }
1625
1626 static void generic_ide_shutdown(struct device *dev)
1627 {
1628 ide_drive_t *drive = to_ide_device(dev);
1629 ide_driver_t *drv = to_ide_driver(dev->driver);
1630
1631 if (dev->driver && drv->shutdown)
1632 drv->shutdown(drive);
1633 }
1634
1635 struct bus_type ide_bus_type = {
1636 .name = "ide",
1637 .match = ide_bus_match,
1638 .uevent = ide_uevent,
1639 .probe = generic_ide_probe,
1640 .remove = generic_ide_remove,
1641 .shutdown = generic_ide_shutdown,
1642 .dev_attrs = ide_dev_attrs,
1643 .suspend = generic_ide_suspend,
1644 .resume = generic_ide_resume,
1645 };
1646
1647 EXPORT_SYMBOL_GPL(ide_bus_type);
1648
1649 /*
1650 * This is gets invoked once during initialization, to set *everything* up
1651 */
1652 static int __init ide_init(void)
1653 {
1654 int ret;
1655
1656 printk(KERN_INFO "Uniform Multi-Platform E-IDE driver " REVISION "\n");
1657 system_bus_speed = ide_system_bus_speed();
1658
1659 printk(KERN_INFO "ide: Assuming %dMHz system bus speed "
1660 "for PIO modes%s\n", system_bus_speed,
1661 idebus_parameter ? "" : "; override with idebus=xx");
1662
1663 ret = bus_register(&ide_bus_type);
1664 if (ret < 0) {
1665 printk(KERN_WARNING "IDE: bus_register error: %d\n", ret);
1666 return ret;
1667 }
1668
1669 init_ide_data();
1670
1671 proc_ide_create();
1672
1673 return 0;
1674 }
1675
1676 #ifdef MODULE
1677 static char *options = NULL;
1678 module_param(options, charp, 0);
1679 MODULE_LICENSE("GPL");
1680
1681 static void __init parse_options (char *line)
1682 {
1683 char *next = line;
1684
1685 if (line == NULL || !*line)
1686 return;
1687 while ((line = next) != NULL) {
1688 if ((next = strchr(line,' ')) != NULL)
1689 *next++ = 0;
1690 if (!ide_setup(line))
1691 printk (KERN_INFO "Unknown option '%s'\n", line);
1692 }
1693 }
1694
1695 int __init init_module (void)
1696 {
1697 parse_options(options);
1698 return ide_init();
1699 }
1700
1701 void __exit cleanup_module (void)
1702 {
1703 int index;
1704
1705 for (index = 0; index < MAX_HWIFS; ++index)
1706 ide_unregister(index);
1707
1708 proc_ide_destroy();
1709
1710 bus_unregister(&ide_bus_type);
1711 }
1712
1713 #else /* !MODULE */
1714
1715 __setup("", ide_setup);
1716
1717 module_init(ide_init);
1718
1719 #endif /* MODULE */
Linux kernel - Deliverables
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