projects / deliverable / linux.git / blob
? search:
summary | shortlog | log | commit | commitdiff | tree
blame | history | raw | HEAD
ide: remove redundant hwif->present check 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 init_hwif_default(hwif, index);
722 }
723
724 ide_init_port_hw(hwif, hw);
725 hwif->quirkproc = quirkproc;
726
727 idx[0] = index;
728
729 ide_device_add(idx, NULL);
730
731 if (hwifp)
732 *hwifp = hwif;
733
734 return hwif->present ? index : -1;
735 }
736
737 EXPORT_SYMBOL(ide_register_hw);
738
739 /*
740 * Locks for IDE setting functionality
741 */
742
743 DEFINE_MUTEX(ide_setting_mtx);
744
745 EXPORT_SYMBOL_GPL(ide_setting_mtx);
746
747 /**
748 * ide_spin_wait_hwgroup - wait for group
749 * @drive: drive in the group
750 *
751 * Wait for an IDE device group to go non busy and then return
752 * holding the ide_lock which guards the hwgroup->busy status
753 * and right to use it.
754 */
755
756 int ide_spin_wait_hwgroup (ide_drive_t *drive)
757 {
758 ide_hwgroup_t *hwgroup = HWGROUP(drive);
759 unsigned long timeout = jiffies + (3 * HZ);
760
761 spin_lock_irq(&ide_lock);
762
763 while (hwgroup->busy) {
764 unsigned long lflags;
765 spin_unlock_irq(&ide_lock);
766 local_irq_set(lflags);
767 if (time_after(jiffies, timeout)) {
768 local_irq_restore(lflags);
769 printk(KERN_ERR "%s: channel busy\n", drive->name);
770 return -EBUSY;
771 }
772 local_irq_restore(lflags);
773 spin_lock_irq(&ide_lock);
774 }
775 return 0;
776 }
777
778 EXPORT_SYMBOL(ide_spin_wait_hwgroup);
779
780 int set_io_32bit(ide_drive_t *drive, int arg)
781 {
782 if (drive->no_io_32bit)
783 return -EPERM;
784
785 if (arg < 0 || arg > 1 + (SUPPORT_VLB_SYNC << 1))
786 return -EINVAL;
787
788 if (ide_spin_wait_hwgroup(drive))
789 return -EBUSY;
790
791 drive->io_32bit = arg;
792
793 spin_unlock_irq(&ide_lock);
794
795 return 0;
796 }
797
798 static int set_ksettings(ide_drive_t *drive, int arg)
799 {
800 if (arg < 0 || arg > 1)
801 return -EINVAL;
802
803 if (ide_spin_wait_hwgroup(drive))
804 return -EBUSY;
805 drive->keep_settings = arg;
806 spin_unlock_irq(&ide_lock);
807
808 return 0;
809 }
810
811 int set_using_dma(ide_drive_t *drive, int arg)
812 {
813 #ifdef CONFIG_BLK_DEV_IDEDMA
814 ide_hwif_t *hwif = drive->hwif;
815 int err = -EPERM;
816
817 if (arg < 0 || arg > 1)
818 return -EINVAL;
819
820 if (!drive->id || !(drive->id->capability & 1))
821 goto out;
822
823 if (hwif->dma_host_set == NULL)
824 goto out;
825
826 err = -EBUSY;
827 if (ide_spin_wait_hwgroup(drive))
828 goto out;
829 /*
830 * set ->busy flag, unlock and let it ride
831 */
832 hwif->hwgroup->busy = 1;
833 spin_unlock_irq(&ide_lock);
834
835 err = 0;
836
837 if (arg) {
838 if (ide_set_dma(drive))
839 err = -EIO;
840 } else
841 ide_dma_off(drive);
842
843 /*
844 * lock, clear ->busy flag and unlock before leaving
845 */
846 spin_lock_irq(&ide_lock);
847 hwif->hwgroup->busy = 0;
848 spin_unlock_irq(&ide_lock);
849 out:
850 return err;
851 #else
852 if (arg < 0 || arg > 1)
853 return -EINVAL;
854
855 return -EPERM;
856 #endif
857 }
858
859 int set_pio_mode(ide_drive_t *drive, int arg)
860 {
861 struct request rq;
862
863 if (arg < 0 || arg > 255)
864 return -EINVAL;
865
866 if (drive->hwif->set_pio_mode == NULL)
867 return -ENOSYS;
868
869 if (drive->special.b.set_tune)
870 return -EBUSY;
871
872 ide_init_drive_cmd(&rq);
873 rq.cmd_type = REQ_TYPE_ATA_TASKFILE;
874
875 drive->tune_req = (u8) arg;
876 drive->special.b.set_tune = 1;
877 (void) ide_do_drive_cmd(drive, &rq, ide_wait);
878 return 0;
879 }
880
881 static int set_unmaskirq(ide_drive_t *drive, int arg)
882 {
883 if (drive->no_unmask)
884 return -EPERM;
885
886 if (arg < 0 || arg > 1)
887 return -EINVAL;
888
889 if (ide_spin_wait_hwgroup(drive))
890 return -EBUSY;
891 drive->unmask = arg;
892 spin_unlock_irq(&ide_lock);
893
894 return 0;
895 }
896
897 /**
898 * system_bus_clock - clock guess
899 *
900 * External version of the bus clock guess used by very old IDE drivers
901 * for things like VLB timings. Should not be used.
902 */
903
904 int system_bus_clock (void)
905 {
906 return system_bus_speed;
907 }
908
909 EXPORT_SYMBOL(system_bus_clock);
910
911 static int generic_ide_suspend(struct device *dev, pm_message_t mesg)
912 {
913 ide_drive_t *drive = dev->driver_data;
914 ide_hwif_t *hwif = HWIF(drive);
915 struct request rq;
916 struct request_pm_state rqpm;
917 ide_task_t args;
918 int ret;
919
920 /* Call ACPI _GTM only once */
921 if (!(drive->dn % 2))
922 ide_acpi_get_timing(hwif);
923
924 memset(&rq, 0, sizeof(rq));
925 memset(&rqpm, 0, sizeof(rqpm));
926 memset(&args, 0, sizeof(args));
927 rq.cmd_type = REQ_TYPE_PM_SUSPEND;
928 rq.special = &args;
929 rq.data = &rqpm;
930 rqpm.pm_step = ide_pm_state_start_suspend;
931 if (mesg.event == PM_EVENT_PRETHAW)
932 mesg.event = PM_EVENT_FREEZE;
933 rqpm.pm_state = mesg.event;
934
935 ret = ide_do_drive_cmd(drive, &rq, ide_wait);
936 /* only call ACPI _PS3 after both drivers are suspended */
937 if (!ret && (((drive->dn % 2) && hwif->drives[0].present
938 && hwif->drives[1].present)
939 || !hwif->drives[0].present
940 || !hwif->drives[1].present))
941 ide_acpi_set_state(hwif, 0);
942 return ret;
943 }
944
945 static int generic_ide_resume(struct device *dev)
946 {
947 ide_drive_t *drive = dev->driver_data;
948 ide_hwif_t *hwif = HWIF(drive);
949 struct request rq;
950 struct request_pm_state rqpm;
951 ide_task_t args;
952 int err;
953
954 /* Call ACPI _STM only once */
955 if (!(drive->dn % 2)) {
956 ide_acpi_set_state(hwif, 1);
957 ide_acpi_push_timing(hwif);
958 }
959
960 ide_acpi_exec_tfs(drive);
961
962 memset(&rq, 0, sizeof(rq));
963 memset(&rqpm, 0, sizeof(rqpm));
964 memset(&args, 0, sizeof(args));
965 rq.cmd_type = REQ_TYPE_PM_RESUME;
966 rq.special = &args;
967 rq.data = &rqpm;
968 rqpm.pm_step = ide_pm_state_start_resume;
969 rqpm.pm_state = PM_EVENT_ON;
970
971 err = ide_do_drive_cmd(drive, &rq, ide_head_wait);
972
973 if (err == 0 && dev->driver) {
974 ide_driver_t *drv = to_ide_driver(dev->driver);
975
976 if (drv->resume)
977 drv->resume(drive);
978 }
979
980 return err;
981 }
982
983 int generic_ide_ioctl(ide_drive_t *drive, struct file *file, struct block_device *bdev,
984 unsigned int cmd, unsigned long arg)
985 {
986 unsigned long flags;
987 ide_driver_t *drv;
988 void __user *p = (void __user *)arg;
989 int err = 0, (*setfunc)(ide_drive_t *, int);
990 u8 *val;
991
992 switch (cmd) {
993 case HDIO_GET_32BIT: val = &drive->io_32bit; goto read_val;
994 case HDIO_GET_KEEPSETTINGS: val = &drive->keep_settings; goto read_val;
995 case HDIO_GET_UNMASKINTR: val = &drive->unmask; goto read_val;
996 case HDIO_GET_DMA: val = &drive->using_dma; goto read_val;
997 case HDIO_SET_32BIT: setfunc = set_io_32bit; goto set_val;
998 case HDIO_SET_KEEPSETTINGS: setfunc = set_ksettings; goto set_val;
999 case HDIO_SET_PIO_MODE: setfunc = set_pio_mode; goto set_val;
1000 case HDIO_SET_UNMASKINTR: setfunc = set_unmaskirq; goto set_val;
1001 case HDIO_SET_DMA: setfunc = set_using_dma; goto set_val;
1002 }
1003
1004 switch (cmd) {
1005 case HDIO_OBSOLETE_IDENTITY:
1006 case HDIO_GET_IDENTITY:
1007 if (bdev != bdev->bd_contains)
1008 return -EINVAL;
1009 if (drive->id_read == 0)
1010 return -ENOMSG;
1011 if (copy_to_user(p, drive->id, (cmd == HDIO_GET_IDENTITY) ? sizeof(*drive->id) : 142))
1012 return -EFAULT;
1013 return 0;
1014
1015 case HDIO_GET_NICE:
1016 return put_user(drive->dsc_overlap << IDE_NICE_DSC_OVERLAP |
1017 drive->atapi_overlap << IDE_NICE_ATAPI_OVERLAP |
1018 drive->nice0 << IDE_NICE_0 |
1019 drive->nice1 << IDE_NICE_1 |
1020 drive->nice2 << IDE_NICE_2,
1021 (long __user *) arg);
1022
1023 #ifdef CONFIG_IDE_TASK_IOCTL
1024 case HDIO_DRIVE_TASKFILE:
1025 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
1026 return -EACCES;
1027 switch(drive->media) {
1028 case ide_disk:
1029 return ide_taskfile_ioctl(drive, cmd, arg);
1030 default:
1031 return -ENOMSG;
1032 }
1033 #endif /* CONFIG_IDE_TASK_IOCTL */
1034
1035 case HDIO_DRIVE_CMD:
1036 if (!capable(CAP_SYS_RAWIO))
1037 return -EACCES;
1038 return ide_cmd_ioctl(drive, cmd, arg);
1039
1040 case HDIO_DRIVE_TASK:
1041 if (!capable(CAP_SYS_RAWIO))
1042 return -EACCES;
1043 return ide_task_ioctl(drive, cmd, arg);
1044
1045 case HDIO_SCAN_HWIF:
1046 {
1047 hw_regs_t hw;
1048 int args[3];
1049 if (!capable(CAP_SYS_RAWIO)) return -EACCES;
1050 if (copy_from_user(args, p, 3 * sizeof(int)))
1051 return -EFAULT;
1052 memset(&hw, 0, sizeof(hw));
1053 ide_init_hwif_ports(&hw, (unsigned long) args[0],
1054 (unsigned long) args[1], NULL);
1055 hw.irq = args[2];
1056 if (ide_register_hw(&hw, NULL, NULL) == -1)
1057 return -EIO;
1058 return 0;
1059 }
1060 case HDIO_UNREGISTER_HWIF:
1061 if (!capable(CAP_SYS_RAWIO)) return -EACCES;
1062 /* (arg > MAX_HWIFS) checked in function */
1063 ide_unregister(arg);
1064 return 0;
1065 case HDIO_SET_NICE:
1066 if (!capable(CAP_SYS_ADMIN)) return -EACCES;
1067 if (arg != (arg & ((1 << IDE_NICE_DSC_OVERLAP) | (1 << IDE_NICE_1))))
1068 return -EPERM;
1069 drive->dsc_overlap = (arg >> IDE_NICE_DSC_OVERLAP) & 1;
1070 drv = *(ide_driver_t **)bdev->bd_disk->private_data;
1071 if (drive->dsc_overlap && !drv->supports_dsc_overlap) {
1072 drive->dsc_overlap = 0;
1073 return -EPERM;
1074 }
1075 drive->nice1 = (arg >> IDE_NICE_1) & 1;
1076 return 0;
1077 case HDIO_DRIVE_RESET:
1078 {
1079 unsigned long flags;
1080 if (!capable(CAP_SYS_ADMIN)) return -EACCES;
1081
1082 /*
1083 * Abort the current command on the
1084 * group if there is one, taking
1085 * care not to allow anything else
1086 * to be queued and to die on the
1087 * spot if we miss one somehow
1088 */
1089
1090 spin_lock_irqsave(&ide_lock, flags);
1091
1092 if (HWGROUP(drive)->resetting) {
1093 spin_unlock_irqrestore(&ide_lock, flags);
1094 return -EBUSY;
1095 }
1096
1097 ide_abort(drive, "drive reset");
1098
1099 BUG_ON(HWGROUP(drive)->handler);
1100
1101 /* Ensure nothing gets queued after we
1102 drop the lock. Reset will clear the busy */
1103
1104 HWGROUP(drive)->busy = 1;
1105 spin_unlock_irqrestore(&ide_lock, flags);
1106 (void) ide_do_reset(drive);
1107
1108 return 0;
1109 }
1110
1111 case HDIO_GET_BUSSTATE:
1112 if (!capable(CAP_SYS_ADMIN))
1113 return -EACCES;
1114 if (put_user(HWIF(drive)->bus_state, (long __user *)arg))
1115 return -EFAULT;
1116 return 0;
1117
1118 case HDIO_SET_BUSSTATE:
1119 if (!capable(CAP_SYS_ADMIN))
1120 return -EACCES;
1121 if (HWIF(drive)->busproc)
1122 return HWIF(drive)->busproc(drive, (int)arg);
1123 return -EOPNOTSUPP;
1124 default:
1125 return -EINVAL;
1126 }
1127
1128 read_val:
1129 mutex_lock(&ide_setting_mtx);
1130 spin_lock_irqsave(&ide_lock, flags);
1131 err = *val;
1132 spin_unlock_irqrestore(&ide_lock, flags);
1133 mutex_unlock(&ide_setting_mtx);
1134 return err >= 0 ? put_user(err, (long __user *)arg) : err;
1135
1136 set_val:
1137 if (bdev != bdev->bd_contains)
1138 err = -EINVAL;
1139 else {
1140 if (!capable(CAP_SYS_ADMIN))
1141 err = -EACCES;
1142 else {
1143 mutex_lock(&ide_setting_mtx);
1144 err = setfunc(drive, arg);
1145 mutex_unlock(&ide_setting_mtx);
1146 }
1147 }
1148 return err;
1149 }
1150
1151 EXPORT_SYMBOL(generic_ide_ioctl);
1152
1153 /*
1154 * stridx() returns the offset of c within s,
1155 * or -1 if c is '\0' or not found within s.
1156 */
1157 static int __init stridx (const char *s, char c)
1158 {
1159 char *i = strchr(s, c);
1160 return (i && c) ? i - s : -1;
1161 }
1162
1163 /*
1164 * match_parm() does parsing for ide_setup():
1165 *
1166 * 1. the first char of s must be '='.
1167 * 2. if the remainder matches one of the supplied keywords,
1168 * the index (1 based) of the keyword is negated and returned.
1169 * 3. if the remainder is a series of no more than max_vals numbers
1170 * separated by commas, the numbers are saved in vals[] and a
1171 * count of how many were saved is returned. Base10 is assumed,
1172 * and base16 is allowed when prefixed with "0x".
1173 * 4. otherwise, zero is returned.
1174 */
1175 static int __init match_parm (char *s, const char *keywords[], int vals[], int max_vals)
1176 {
1177 static const char *decimal = "0123456789";
1178 static const char *hex = "0123456789abcdef";
1179 int i, n;
1180
1181 if (*s++ == '=') {
1182 /*
1183 * Try matching against the supplied keywords,
1184 * and return -(index+1) if we match one
1185 */
1186 if (keywords != NULL) {
1187 for (i = 0; *keywords != NULL; ++i) {
1188 if (!strcmp(s, *keywords++))
1189 return -(i+1);
1190 }
1191 }
1192 /*
1193 * Look for a series of no more than "max_vals"
1194 * numeric values separated by commas, in base10,
1195 * or base16 when prefixed with "0x".
1196 * Return a count of how many were found.
1197 */
1198 for (n = 0; (i = stridx(decimal, *s)) >= 0;) {
1199 vals[n] = i;
1200 while ((i = stridx(decimal, *++s)) >= 0)
1201 vals[n] = (vals[n] * 10) + i;
1202 if (*s == 'x' && !vals[n]) {
1203 while ((i = stridx(hex, *++s)) >= 0)
1204 vals[n] = (vals[n] * 0x10) + i;
1205 }
1206 if (++n == max_vals)
1207 break;
1208 if (*s == ',' || *s == ';')
1209 ++s;
1210 }
1211 if (!*s)
1212 return n;
1213 }
1214 return 0; /* zero = nothing matched */
1215 }
1216
1217 extern int probe_ali14xx;
1218 extern int probe_umc8672;
1219 extern int probe_dtc2278;
1220 extern int probe_ht6560b;
1221 extern int probe_qd65xx;
1222 extern int cmd640_vlb;
1223
1224 static int __initdata is_chipset_set[MAX_HWIFS];
1225
1226 /*
1227 * ide_setup() gets called VERY EARLY during initialization,
1228 * to handle kernel "command line" strings beginning with "hdx=" or "ide".
1229 *
1230 * Remember to update Documentation/ide.txt if you change something here.
1231 */
1232 static int __init ide_setup(char *s)
1233 {
1234 int i, vals[3];
1235 ide_hwif_t *hwif;
1236 ide_drive_t *drive;
1237 unsigned int hw, unit;
1238 const char max_drive = 'a' + ((MAX_HWIFS * MAX_DRIVES) - 1);
1239 const char max_hwif = '0' + (MAX_HWIFS - 1);
1240
1241
1242 if (strncmp(s,"hd",2) == 0 && s[2] == '=') /* hd= is for hd.c */
1243 return 0; /* driver and not us */
1244
1245 if (strncmp(s,"ide",3) && strncmp(s,"idebus",6) && strncmp(s,"hd",2))
1246 return 0;
1247
1248 printk(KERN_INFO "ide_setup: %s", s);
1249 init_ide_data ();
1250
1251 #ifdef CONFIG_BLK_DEV_IDEDOUBLER
1252 if (!strcmp(s, "ide=doubler")) {
1253 extern int ide_doubler;
1254
1255 printk(" : Enabled support for IDE doublers\n");
1256 ide_doubler = 1;
1257 return 1;
1258 }
1259 #endif /* CONFIG_BLK_DEV_IDEDOUBLER */
1260
1261 if (!strcmp(s, "ide=nodma")) {
1262 printk(" : Prevented DMA\n");
1263 noautodma = 1;
1264 goto obsolete_option;
1265 }
1266
1267 #ifdef CONFIG_IDEPCI_PCIBUS_ORDER
1268 if (!strcmp(s, "ide=reverse")) {
1269 ide_scan_direction = 1;
1270 printk(" : Enabled support for IDE inverse scan order.\n");
1271 return 1;
1272 }
1273 #endif
1274
1275 #ifdef CONFIG_BLK_DEV_IDEACPI
1276 if (!strcmp(s, "ide=noacpi")) {
1277 //printk(" : Disable IDE ACPI support.\n");
1278 ide_noacpi = 1;
1279 return 1;
1280 }
1281 if (!strcmp(s, "ide=acpigtf")) {
1282 //printk(" : Enable IDE ACPI _GTF support.\n");
1283 ide_noacpitfs = 0;
1284 return 1;
1285 }
1286 if (!strcmp(s, "ide=acpionboot")) {
1287 //printk(" : Call IDE ACPI methods on boot.\n");
1288 ide_noacpionboot = 0;
1289 return 1;
1290 }
1291 #endif /* CONFIG_BLK_DEV_IDEACPI */
1292
1293 /*
1294 * Look for drive options: "hdx="
1295 */
1296 if (s[0] == 'h' && s[1] == 'd' && s[2] >= 'a' && s[2] <= max_drive) {
1297 const char *hd_words[] = {
1298 "none", "noprobe", "nowerr", "cdrom", "nodma",
1299 "autotune", "noautotune", "-8", "-9", "-10",
1300 "noflush", "remap", "remap63", "scsi", NULL };
1301 unit = s[2] - 'a';
1302 hw = unit / MAX_DRIVES;
1303 unit = unit % MAX_DRIVES;
1304 hwif = &ide_hwifs[hw];
1305 drive = &hwif->drives[unit];
1306 if (strncmp(s + 4, "ide-", 4) == 0) {
1307 strlcpy(drive->driver_req, s + 4, sizeof(drive->driver_req));
1308 goto done;
1309 }
1310 switch (match_parm(&s[3], hd_words, vals, 3)) {
1311 case -1: /* "none" */
1312 case -2: /* "noprobe" */
1313 drive->noprobe = 1;
1314 goto done;
1315 case -3: /* "nowerr" */
1316 drive->bad_wstat = BAD_R_STAT;
1317 hwif->noprobe = 0;
1318 goto done;
1319 case -4: /* "cdrom" */
1320 drive->present = 1;
1321 drive->media = ide_cdrom;
1322 /* an ATAPI device ignores DRDY */
1323 drive->ready_stat = 0;
1324 hwif->noprobe = 0;
1325 goto done;
1326 case -5: /* nodma */
1327 drive->nodma = 1;
1328 goto done;
1329 case -6: /* "autotune" */
1330 drive->autotune = IDE_TUNE_AUTO;
1331 goto obsolete_option;
1332 case -7: /* "noautotune" */
1333 drive->autotune = IDE_TUNE_NOAUTO;
1334 goto obsolete_option;
1335 case -11: /* noflush */
1336 drive->noflush = 1;
1337 goto done;
1338 case -12: /* "remap" */
1339 drive->remap_0_to_1 = 1;
1340 goto done;
1341 case -13: /* "remap63" */
1342 drive->sect0 = 63;
1343 goto done;
1344 case -14: /* "scsi" */
1345 drive->scsi = 1;
1346 goto done;
1347 case 3: /* cyl,head,sect */
1348 drive->media = ide_disk;
1349 drive->ready_stat = READY_STAT;
1350 drive->cyl = drive->bios_cyl = vals[0];
1351 drive->head = drive->bios_head = vals[1];
1352 drive->sect = drive->bios_sect = vals[2];
1353 drive->present = 1;
1354 drive->forced_geom = 1;
1355 hwif->noprobe = 0;
1356 goto done;
1357 default:
1358 goto bad_option;
1359 }
1360 }
1361
1362 if (s[0] != 'i' || s[1] != 'd' || s[2] != 'e')
1363 goto bad_option;
1364 /*
1365 * Look for bus speed option: "idebus="
1366 */
1367 if (s[3] == 'b' && s[4] == 'u' && s[5] == 's') {
1368 if (match_parm(&s[6], NULL, vals, 1) != 1)
1369 goto bad_option;
1370 if (vals[0] >= 20 && vals[0] <= 66) {
1371 idebus_parameter = vals[0];
1372 } else
1373 printk(" -- BAD BUS SPEED! Expected value from 20 to 66");
1374 goto done;
1375 }
1376 /*
1377 * Look for interface options: "idex="
1378 */
1379 if (s[3] >= '0' && s[3] <= max_hwif) {
1380 /*
1381 * Be VERY CAREFUL changing this: note hardcoded indexes below
1382 * (-8, -9, -10) are reserved to ease the hardcoding.
1383 */
1384 static const char *ide_words[] = {
1385 "noprobe", "serialize", "minus3", "minus4",
1386 "reset", "minus6", "ata66", "minus8", "minus9",
1387 "minus10", "four", "qd65xx", "ht6560b", "cmd640_vlb",
1388 "dtc2278", "umc8672", "ali14xx", NULL };
1389
1390 hw_regs_t hwregs;
1391
1392 hw = s[3] - '0';
1393 hwif = &ide_hwifs[hw];
1394 i = match_parm(&s[4], ide_words, vals, 3);
1395
1396 /*
1397 * Cryptic check to ensure chipset not already set for hwif.
1398 * Note: we can't depend on hwif->chipset here.
1399 */
1400 if ((i >= -18 && i <= -11) || (i > 0 && i <= 3)) {
1401 /* chipset already specified */
1402 if (is_chipset_set[hw])
1403 goto bad_option;
1404 if (i > -18 && i <= -11) {
1405 /* these drivers are for "ide0=" only */
1406 if (hw != 0)
1407 goto bad_hwif;
1408 /* chipset already specified for 2nd port */
1409 if (is_chipset_set[hw+1])
1410 goto bad_option;
1411 }
1412 is_chipset_set[hw] = 1;
1413 printk("\n");
1414 }
1415
1416 switch (i) {
1417 #ifdef CONFIG_BLK_DEV_ALI14XX
1418 case -17: /* "ali14xx" */
1419 probe_ali14xx = 1;
1420 goto done;
1421 #endif
1422 #ifdef CONFIG_BLK_DEV_UMC8672
1423 case -16: /* "umc8672" */
1424 probe_umc8672 = 1;
1425 goto done;
1426 #endif
1427 #ifdef CONFIG_BLK_DEV_DTC2278
1428 case -15: /* "dtc2278" */
1429 probe_dtc2278 = 1;
1430 goto done;
1431 #endif
1432 #ifdef CONFIG_BLK_DEV_CMD640
1433 case -14: /* "cmd640_vlb" */
1434 cmd640_vlb = 1;
1435 goto done;
1436 #endif
1437 #ifdef CONFIG_BLK_DEV_HT6560B
1438 case -13: /* "ht6560b" */
1439 probe_ht6560b = 1;
1440 goto done;
1441 #endif
1442 #ifdef CONFIG_BLK_DEV_QD65XX
1443 case -12: /* "qd65xx" */
1444 probe_qd65xx = 1;
1445 goto done;
1446 #endif
1447 #ifdef CONFIG_BLK_DEV_4DRIVES
1448 case -11: /* "four" drives on one set of ports */
1449 {
1450 ide_hwif_t *mate = &ide_hwifs[hw^1];
1451 mate->drives[0].select.all ^= 0x20;
1452 mate->drives[1].select.all ^= 0x20;
1453 hwif->chipset = mate->chipset = ide_4drives;
1454 mate->irq = hwif->irq;
1455 memcpy(mate->io_ports, hwif->io_ports, sizeof(hwif->io_ports));
1456 hwif->mate = mate;
1457 mate->mate = hwif;
1458 hwif->serialized = mate->serialized = 1;
1459 goto obsolete_option;
1460 }
1461 #endif /* CONFIG_BLK_DEV_4DRIVES */
1462 case -10: /* minus10 */
1463 case -9: /* minus9 */
1464 case -8: /* minus8 */
1465 case -6:
1466 case -4:
1467 case -3:
1468 goto bad_option;
1469 case -7: /* ata66 */
1470 #ifdef CONFIG_BLK_DEV_IDEPCI
1471 /*
1472 * Use ATA_CBL_PATA40_SHORT so drive side
1473 * cable detection is also overriden.
1474 */
1475 hwif->cbl = ATA_CBL_PATA40_SHORT;
1476 goto obsolete_option;
1477 #else
1478 goto bad_hwif;
1479 #endif
1480 case -5: /* "reset" */
1481 hwif->reset = 1;
1482 goto obsolete_option;
1483 case -2: /* "serialize" */
1484 hwif->mate = &ide_hwifs[hw^1];
1485 hwif->mate->mate = hwif;
1486 hwif->serialized = hwif->mate->serialized = 1;
1487 goto obsolete_option;
1488
1489 case -1: /* "noprobe" */
1490 hwif->noprobe = 1;
1491 goto done;
1492
1493 case 1: /* base */
1494 vals[1] = vals[0] + 0x206; /* default ctl */
1495 case 2: /* base,ctl */
1496 vals[2] = 0; /* default irq = probe for it */
1497 case 3: /* base,ctl,irq */
1498 memset(&hwregs, 0, sizeof(hwregs));
1499 ide_init_hwif_ports(&hwregs, vals[0], vals[1], &hwif->irq);
1500 memcpy(hwif->io_ports, hwregs.io_ports, sizeof(hwif->io_ports));
1501 hwif->irq = vals[2];
1502 hwif->noprobe = 0;
1503 hwif->chipset = ide_forced;
1504 goto obsolete_option;
1505
1506 case 0: goto bad_option;
1507 default:
1508 printk(" -- SUPPORT NOT CONFIGURED IN THIS KERNEL\n");
1509 return 1;
1510 }
1511 }
1512 bad_option:
1513 printk(" -- BAD OPTION\n");
1514 return 1;
1515 obsolete_option:
1516 printk(" -- OBSOLETE OPTION, WILL BE REMOVED SOON!\n");
1517 return 1;
1518 bad_hwif:
1519 printk("-- NOT SUPPORTED ON ide%d", hw);
1520 done:
1521 printk("\n");
1522 return 1;
1523 }
1524
1525 EXPORT_SYMBOL(ide_lock);
1526
1527 static int ide_bus_match(struct device *dev, struct device_driver *drv)
1528 {
1529 return 1;
1530 }
1531
1532 static char *media_string(ide_drive_t *drive)
1533 {
1534 switch (drive->media) {
1535 case ide_disk:
1536 return "disk";
1537 case ide_cdrom:
1538 return "cdrom";
1539 case ide_tape:
1540 return "tape";
1541 case ide_floppy:
1542 return "floppy";
1543 case ide_optical:
1544 return "optical";
1545 default:
1546 return "UNKNOWN";
1547 }
1548 }
1549
1550 static ssize_t media_show(struct device *dev, struct device_attribute *attr, char *buf)
1551 {
1552 ide_drive_t *drive = to_ide_device(dev);
1553 return sprintf(buf, "%s\n", media_string(drive));
1554 }
1555
1556 static ssize_t drivename_show(struct device *dev, struct device_attribute *attr, char *buf)
1557 {
1558 ide_drive_t *drive = to_ide_device(dev);
1559 return sprintf(buf, "%s\n", drive->name);
1560 }
1561
1562 static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf)
1563 {
1564 ide_drive_t *drive = to_ide_device(dev);
1565 return sprintf(buf, "ide:m-%s\n", media_string(drive));
1566 }
1567
1568 static ssize_t model_show(struct device *dev, struct device_attribute *attr,
1569 char *buf)
1570 {
1571 ide_drive_t *drive = to_ide_device(dev);
1572 return sprintf(buf, "%s\n", drive->id->model);
1573 }
1574
1575 static ssize_t firmware_show(struct device *dev, struct device_attribute *attr,
1576 char *buf)
1577 {
1578 ide_drive_t *drive = to_ide_device(dev);
1579 return sprintf(buf, "%s\n", drive->id->fw_rev);
1580 }
1581
1582 static ssize_t serial_show(struct device *dev, struct device_attribute *attr,
1583 char *buf)
1584 {
1585 ide_drive_t *drive = to_ide_device(dev);
1586 return sprintf(buf, "%s\n", drive->id->serial_no);
1587 }
1588
1589 static struct device_attribute ide_dev_attrs[] = {
1590 __ATTR_RO(media),
1591 __ATTR_RO(drivename),
1592 __ATTR_RO(modalias),
1593 __ATTR_RO(model),
1594 __ATTR_RO(firmware),
1595 __ATTR(serial, 0400, serial_show, NULL),
1596 __ATTR_NULL
1597 };
1598
1599 static int ide_uevent(struct device *dev, struct kobj_uevent_env *env)
1600 {
1601 ide_drive_t *drive = to_ide_device(dev);
1602
1603 add_uevent_var(env, "MEDIA=%s", media_string(drive));
1604 add_uevent_var(env, "DRIVENAME=%s", drive->name);
1605 add_uevent_var(env, "MODALIAS=ide:m-%s", media_string(drive));
1606 return 0;
1607 }
1608
1609 static int generic_ide_probe(struct device *dev)
1610 {
1611 ide_drive_t *drive = to_ide_device(dev);
1612 ide_driver_t *drv = to_ide_driver(dev->driver);
1613
1614 return drv->probe ? drv->probe(drive) : -ENODEV;
1615 }
1616
1617 static int generic_ide_remove(struct device *dev)
1618 {
1619 ide_drive_t *drive = to_ide_device(dev);
1620 ide_driver_t *drv = to_ide_driver(dev->driver);
1621
1622 if (drv->remove)
1623 drv->remove(drive);
1624
1625 return 0;
1626 }
1627
1628 static void generic_ide_shutdown(struct device *dev)
1629 {
1630 ide_drive_t *drive = to_ide_device(dev);
1631 ide_driver_t *drv = to_ide_driver(dev->driver);
1632
1633 if (dev->driver && drv->shutdown)
1634 drv->shutdown(drive);
1635 }
1636
1637 struct bus_type ide_bus_type = {
1638 .name = "ide",
1639 .match = ide_bus_match,
1640 .uevent = ide_uevent,
1641 .probe = generic_ide_probe,
1642 .remove = generic_ide_remove,
1643 .shutdown = generic_ide_shutdown,
1644 .dev_attrs = ide_dev_attrs,
1645 .suspend = generic_ide_suspend,
1646 .resume = generic_ide_resume,
1647 };
1648
1649 EXPORT_SYMBOL_GPL(ide_bus_type);
1650
1651 /*
1652 * This is gets invoked once during initialization, to set *everything* up
1653 */
1654 static int __init ide_init(void)
1655 {
1656 int ret;
1657
1658 printk(KERN_INFO "Uniform Multi-Platform E-IDE driver " REVISION "\n");
1659 system_bus_speed = ide_system_bus_speed();
1660
1661 printk(KERN_INFO "ide: Assuming %dMHz system bus speed "
1662 "for PIO modes%s\n", system_bus_speed,
1663 idebus_parameter ? "" : "; override with idebus=xx");
1664
1665 ret = bus_register(&ide_bus_type);
1666 if (ret < 0) {
1667 printk(KERN_WARNING "IDE: bus_register error: %d\n", ret);
1668 return ret;
1669 }
1670
1671 init_ide_data();
1672
1673 proc_ide_create();
1674
1675 return 0;
1676 }
1677
1678 #ifdef MODULE
1679 static char *options = NULL;
1680 module_param(options, charp, 0);
1681 MODULE_LICENSE("GPL");
1682
1683 static void __init parse_options (char *line)
1684 {
1685 char *next = line;
1686
1687 if (line == NULL || !*line)
1688 return;
1689 while ((line = next) != NULL) {
1690 if ((next = strchr(line,' ')) != NULL)
1691 *next++ = 0;
1692 if (!ide_setup(line))
1693 printk (KERN_INFO "Unknown option '%s'\n", line);
1694 }
1695 }
1696
1697 int __init init_module (void)
1698 {
1699 parse_options(options);
1700 return ide_init();
1701 }
1702
1703 void __exit cleanup_module (void)
1704 {
1705 int index;
1706
1707 for (index = 0; index < MAX_HWIFS; ++index)
1708 ide_unregister(index);
1709
1710 proc_ide_destroy();
1711
1712 bus_unregister(&ide_bus_type);
1713 }
1714
1715 #else /* !MODULE */
1716
1717 __setup("", ide_setup);
1718
1719 module_init(ide_init);
1720
1721 #endif /* MODULE */
Linux kernel - Deliverables
This page took 0.09004 seconds and 5 git commands to generate.