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ide: keep pointer to struct device instead of struct pci_dev in ide_hwif_t
[mirror_ubuntu-bionic-kernel.git] / drivers / ide / ide.c
1 /*
2 * linux/drivers/ide/ide.c Version 7.00beta2 Mar 05 2003
3 *
4 * Copyright (C) 1994-1998 Linus Torvalds & authors (see below)
5 */
6
7 /*
8 * Mostly written by Mark Lord <mlord@pobox.com>
9 * and Gadi Oxman <gadio@netvision.net.il>
10 * and Andre Hedrick <andre@linux-ide.org>
11 *
12 * See linux/MAINTAINERS for address of current maintainer.
13 *
14 * This is the multiple IDE interface driver, as evolved from hd.c.
15 * It supports up to MAX_HWIFS IDE interfaces, on one or more IRQs
16 * (usually 14 & 15).
17 * There can be up to two drives per interface, as per the ATA-2 spec.
18 *
19 * ...
20 *
21 * From hd.c:
22 * |
23 * | It traverses the request-list, using interrupts to jump between functions.
24 * | As nearly all functions can be called within interrupts, we may not sleep.
25 * | Special care is recommended. Have Fun!
26 * |
27 * | modified by Drew Eckhardt to check nr of hd's from the CMOS.
28 * |
29 * | Thanks to Branko Lankester, lankeste@fwi.uva.nl, who found a bug
30 * | in the early extended-partition checks and added DM partitions.
31 * |
32 * | Early work on error handling by Mika Liljeberg (liljeber@cs.Helsinki.FI).
33 * |
34 * | IRQ-unmask, drive-id, multiple-mode, support for ">16 heads",
35 * | and general streamlining by Mark Lord (mlord@pobox.com).
36 *
37 * October, 1994 -- Complete line-by-line overhaul for linux 1.1.x, by:
38 *
39 * Mark Lord (mlord@pobox.com) (IDE Perf.Pkg)
40 * Delman Lee (delman@ieee.org) ("Mr. atdisk2")
41 * Scott Snyder (snyder@fnald0.fnal.gov) (ATAPI IDE cd-rom)
42 *
43 * This was a rewrite of just about everything from hd.c, though some original
44 * code is still sprinkled about. Think of it as a major evolution, with
45 * inspiration from lots of linux users, esp. hamish@zot.apana.org.au
46 */
47
48 #define REVISION "Revision: 7.00alpha2"
49 #define VERSION "Id: ide.c 7.00a2 20020906"
50
51 #define _IDE_C /* Tell ide.h it's really us */
52
53 #include <linux/module.h>
54 #include <linux/types.h>
55 #include <linux/string.h>
56 #include <linux/kernel.h>
57 #include <linux/timer.h>
58 #include <linux/mm.h>
59 #include <linux/interrupt.h>
60 #include <linux/major.h>
61 #include <linux/errno.h>
62 #include <linux/genhd.h>
63 #include <linux/blkpg.h>
64 #include <linux/slab.h>
65 #include <linux/init.h>
66 #include <linux/pci.h>
67 #include <linux/delay.h>
68 #include <linux/ide.h>
69 #include <linux/completion.h>
70 #include <linux/reboot.h>
71 #include <linux/cdrom.h>
72 #include <linux/seq_file.h>
73 #include <linux/device.h>
74 #include <linux/bitops.h>
75
76 #include <asm/byteorder.h>
77 #include <asm/irq.h>
78 #include <asm/uaccess.h>
79 #include <asm/io.h>
80
81
82 /* default maximum number of failures */
83 #define IDE_DEFAULT_MAX_FAILURES 1
84
85 static const u8 ide_hwif_to_major[] = { IDE0_MAJOR, IDE1_MAJOR,
86 IDE2_MAJOR, IDE3_MAJOR,
87 IDE4_MAJOR, IDE5_MAJOR,
88 IDE6_MAJOR, IDE7_MAJOR,
89 IDE8_MAJOR, IDE9_MAJOR };
90
91 static int idebus_parameter; /* holds the "idebus=" parameter */
92 static int system_bus_speed; /* holds what we think is VESA/PCI bus speed */
93
94 DEFINE_MUTEX(ide_cfg_mtx);
95 __cacheline_aligned_in_smp DEFINE_SPINLOCK(ide_lock);
96
97 #ifdef CONFIG_IDEPCI_PCIBUS_ORDER
98 int ide_scan_direction; /* THIS was formerly 2.2.x pci=reverse */
99 #endif
100
101 int noautodma = 0;
102
103 #ifdef CONFIG_BLK_DEV_IDEACPI
104 int ide_noacpi = 0;
105 int ide_noacpitfs = 1;
106 int ide_noacpionboot = 1;
107 #endif
108
109 /*
110 * This is declared extern in ide.h, for access by other IDE modules:
111 */
112 ide_hwif_t ide_hwifs[MAX_HWIFS]; /* master data repository */
113
114 EXPORT_SYMBOL(ide_hwifs);
115
116 /*
117 * Do not even *think* about calling this!
118 */
119 void ide_init_port_data(ide_hwif_t *hwif, unsigned int index)
120 {
121 unsigned int unit;
122
123 /* bulk initialize hwif & drive info with zeros */
124 memset(hwif, 0, sizeof(ide_hwif_t));
125
126 /* fill in any non-zero initial values */
127 hwif->index = index;
128 hwif->major = ide_hwif_to_major[index];
129
130 hwif->name[0] = 'i';
131 hwif->name[1] = 'd';
132 hwif->name[2] = 'e';
133 hwif->name[3] = '0' + index;
134
135 hwif->bus_state = BUSSTATE_ON;
136
137 init_completion(&hwif->gendev_rel_comp);
138
139 default_hwif_iops(hwif);
140 default_hwif_transport(hwif);
141 for (unit = 0; unit < MAX_DRIVES; ++unit) {
142 ide_drive_t *drive = &hwif->drives[unit];
143
144 drive->media = ide_disk;
145 drive->select.all = (unit<<4)|0xa0;
146 drive->hwif = hwif;
147 drive->ctl = 0x08;
148 drive->ready_stat = READY_STAT;
149 drive->bad_wstat = BAD_W_STAT;
150 drive->special.b.recalibrate = 1;
151 drive->special.b.set_geometry = 1;
152 drive->name[0] = 'h';
153 drive->name[1] = 'd';
154 drive->name[2] = 'a' + (index * MAX_DRIVES) + unit;
155 drive->max_failures = IDE_DEFAULT_MAX_FAILURES;
156 drive->using_dma = 0;
157 drive->vdma = 0;
158 INIT_LIST_HEAD(&drive->list);
159 init_completion(&drive->gendev_rel_comp);
160 }
161 }
162 EXPORT_SYMBOL_GPL(ide_init_port_data);
163
164 static void init_hwif_default(ide_hwif_t *hwif, unsigned int index)
165 {
166 hw_regs_t hw;
167
168 memset(&hw, 0, sizeof(hw_regs_t));
169
170 ide_init_hwif_ports(&hw, ide_default_io_base(index), 0, &hwif->irq);
171
172 memcpy(hwif->io_ports, hw.io_ports, sizeof(hw.io_ports));
173
174 hwif->noprobe = !hwif->io_ports[IDE_DATA_OFFSET];
175 #ifdef CONFIG_BLK_DEV_HD
176 if (hwif->io_ports[IDE_DATA_OFFSET] == HD_DATA)
177 hwif->noprobe = 1; /* may be overridden by ide_setup() */
178 #endif
179 }
180
181 /*
182 * init_ide_data() sets reasonable default values into all fields
183 * of all instances of the hwifs and drives, but only on the first call.
184 * Subsequent calls have no effect (they don't wipe out anything).
185 *
186 * This routine is normally called at driver initialization time,
187 * but may also be called MUCH earlier during kernel "command-line"
188 * parameter processing. As such, we cannot depend on any other parts
189 * of the kernel (such as memory allocation) to be functioning yet.
190 *
191 * This is too bad, as otherwise we could dynamically allocate the
192 * ide_drive_t structs as needed, rather than always consuming memory
193 * for the max possible number (MAX_HWIFS * MAX_DRIVES) of them.
194 *
195 * FIXME: We should stuff the setup data into __init and copy the
196 * relevant hwifs/allocate them properly during boot.
197 */
198 #define MAGIC_COOKIE 0x12345678
199 static void __init init_ide_data (void)
200 {
201 ide_hwif_t *hwif;
202 unsigned int index;
203 static unsigned long magic_cookie = MAGIC_COOKIE;
204
205 if (magic_cookie != MAGIC_COOKIE)
206 return; /* already initialized */
207 magic_cookie = 0;
208
209 /* Initialise all interface structures */
210 for (index = 0; index < MAX_HWIFS; ++index) {
211 hwif = &ide_hwifs[index];
212 ide_init_port_data(hwif, index);
213 init_hwif_default(hwif, index);
214 #if !defined(CONFIG_PPC32) || !defined(CONFIG_PCI)
215 hwif->irq =
216 ide_init_default_irq(hwif->io_ports[IDE_DATA_OFFSET]);
217 #endif
218 }
219 }
220
221 /**
222 * ide_system_bus_speed - guess bus speed
223 *
224 * ide_system_bus_speed() returns what we think is the system VESA/PCI
225 * bus speed (in MHz). This is used for calculating interface PIO timings.
226 * The default is 40 for known PCI systems, 50 otherwise.
227 * The "idebus=xx" parameter can be used to override this value.
228 * The actual value to be used is computed/displayed the first time
229 * through. Drivers should only use this as a last resort.
230 *
231 * Returns a guessed speed in MHz.
232 */
233
234 static int ide_system_bus_speed(void)
235 {
236 #ifdef CONFIG_PCI
237 static struct pci_device_id pci_default[] = {
238 { PCI_DEVICE(PCI_ANY_ID, PCI_ANY_ID) },
239 { }
240 };
241 #else
242 #define pci_default 0
243 #endif /* CONFIG_PCI */
244
245 if (!system_bus_speed) {
246 if (idebus_parameter) {
247 /* user supplied value */
248 system_bus_speed = idebus_parameter;
249 } else if (pci_dev_present(pci_default)) {
250 /* safe default value for PCI */
251 system_bus_speed = 33;
252 } else {
253 /* safe default value for VESA and PCI */
254 system_bus_speed = 50;
255 }
256 printk(KERN_INFO "ide: Assuming %dMHz system bus speed "
257 "for PIO modes%s\n", system_bus_speed,
258 idebus_parameter ? "" : "; override with idebus=xx");
259 }
260 return system_bus_speed;
261 }
262
263 ide_hwif_t * ide_find_port(unsigned long base)
264 {
265 ide_hwif_t *hwif;
266 int i;
267
268 for (i = 0; i < MAX_HWIFS; i++) {
269 hwif = &ide_hwifs[i];
270 if (hwif->io_ports[IDE_DATA_OFFSET] == base)
271 goto found;
272 }
273
274 for (i = 0; i < MAX_HWIFS; i++) {
275 hwif = &ide_hwifs[i];
276 if (hwif->io_ports[IDE_DATA_OFFSET] == 0)
277 goto found;
278 }
279
280 hwif = NULL;
281 found:
282 return hwif;
283 }
284
285 EXPORT_SYMBOL_GPL(ide_find_port);
286
287 static struct resource* hwif_request_region(ide_hwif_t *hwif,
288 unsigned long addr, int num)
289 {
290 struct resource *res = request_region(addr, num, hwif->name);
291
292 if (!res)
293 printk(KERN_ERR "%s: I/O resource 0x%lX-0x%lX not free.\n",
294 hwif->name, addr, addr+num-1);
295 return res;
296 }
297
298 /**
299 * ide_hwif_request_regions - request resources for IDE
300 * @hwif: interface to use
301 *
302 * Requests all the needed resources for an interface.
303 * Right now core IDE code does this work which is deeply wrong.
304 * MMIO leaves it to the controller driver,
305 * PIO will migrate this way over time.
306 */
307
308 int ide_hwif_request_regions(ide_hwif_t *hwif)
309 {
310 unsigned long addr;
311 unsigned int i;
312
313 if (hwif->mmio)
314 return 0;
315 addr = hwif->io_ports[IDE_CONTROL_OFFSET];
316 if (addr && !hwif_request_region(hwif, addr, 1))
317 goto control_region_busy;
318 hwif->straight8 = 0;
319 addr = hwif->io_ports[IDE_DATA_OFFSET];
320 if ((addr | 7) == hwif->io_ports[IDE_STATUS_OFFSET]) {
321 if (!hwif_request_region(hwif, addr, 8))
322 goto data_region_busy;
323 hwif->straight8 = 1;
324 return 0;
325 }
326 for (i = IDE_DATA_OFFSET; i <= IDE_STATUS_OFFSET; i++) {
327 addr = hwif->io_ports[i];
328 if (!hwif_request_region(hwif, addr, 1)) {
329 while (--i)
330 release_region(addr, 1);
331 goto data_region_busy;
332 }
333 }
334 return 0;
335
336 data_region_busy:
337 addr = hwif->io_ports[IDE_CONTROL_OFFSET];
338 if (addr)
339 release_region(addr, 1);
340 control_region_busy:
341 /* If any errors are return, we drop the hwif interface. */
342 return -EBUSY;
343 }
344
345 /**
346 * ide_hwif_release_regions - free IDE resources
347 *
348 * Note that we only release the standard ports,
349 * and do not even try to handle any extra ports
350 * allocated for weird IDE interface chipsets.
351 *
352 * Note also that we don't yet handle mmio resources here. More
353 * importantly our caller should be doing this so we need to
354 * restructure this as a helper function for drivers.
355 */
356
357 void ide_hwif_release_regions(ide_hwif_t *hwif)
358 {
359 u32 i = 0;
360
361 if (hwif->mmio)
362 return;
363 if (hwif->io_ports[IDE_CONTROL_OFFSET])
364 release_region(hwif->io_ports[IDE_CONTROL_OFFSET], 1);
365 if (hwif->straight8) {
366 release_region(hwif->io_ports[IDE_DATA_OFFSET], 8);
367 return;
368 }
369 for (i = IDE_DATA_OFFSET; i <= IDE_STATUS_OFFSET; i++)
370 if (hwif->io_ports[i])
371 release_region(hwif->io_ports[i], 1);
372 }
373
374 /**
375 * ide_hwif_restore - restore hwif to template
376 * @hwif: hwif to update
377 * @tmp_hwif: template
378 *
379 * Restore hwif to a previous state by copying most settings
380 * from the template.
381 */
382
383 static void ide_hwif_restore(ide_hwif_t *hwif, ide_hwif_t *tmp_hwif)
384 {
385 hwif->hwgroup = tmp_hwif->hwgroup;
386
387 hwif->gendev.parent = tmp_hwif->gendev.parent;
388
389 hwif->proc = tmp_hwif->proc;
390
391 hwif->major = tmp_hwif->major;
392 hwif->straight8 = tmp_hwif->straight8;
393 hwif->bus_state = tmp_hwif->bus_state;
394
395 hwif->host_flags = tmp_hwif->host_flags;
396
397 hwif->pio_mask = tmp_hwif->pio_mask;
398
399 hwif->ultra_mask = tmp_hwif->ultra_mask;
400 hwif->mwdma_mask = tmp_hwif->mwdma_mask;
401 hwif->swdma_mask = tmp_hwif->swdma_mask;
402
403 hwif->cbl = tmp_hwif->cbl;
404
405 hwif->chipset = tmp_hwif->chipset;
406 hwif->hold = tmp_hwif->hold;
407
408 hwif->dev = tmp_hwif->dev;
409
410 #ifdef CONFIG_BLK_DEV_IDEPCI
411 hwif->cds = tmp_hwif->cds;
412 #endif
413
414 hwif->set_pio_mode = tmp_hwif->set_pio_mode;
415 hwif->set_dma_mode = tmp_hwif->set_dma_mode;
416 hwif->mdma_filter = tmp_hwif->mdma_filter;
417 hwif->udma_filter = tmp_hwif->udma_filter;
418 hwif->selectproc = tmp_hwif->selectproc;
419 hwif->reset_poll = tmp_hwif->reset_poll;
420 hwif->pre_reset = tmp_hwif->pre_reset;
421 hwif->resetproc = tmp_hwif->resetproc;
422 hwif->maskproc = tmp_hwif->maskproc;
423 hwif->quirkproc = tmp_hwif->quirkproc;
424 hwif->busproc = tmp_hwif->busproc;
425
426 hwif->ata_input_data = tmp_hwif->ata_input_data;
427 hwif->ata_output_data = tmp_hwif->ata_output_data;
428 hwif->atapi_input_bytes = tmp_hwif->atapi_input_bytes;
429 hwif->atapi_output_bytes = tmp_hwif->atapi_output_bytes;
430
431 hwif->dma_host_set = tmp_hwif->dma_host_set;
432 hwif->dma_setup = tmp_hwif->dma_setup;
433 hwif->dma_exec_cmd = tmp_hwif->dma_exec_cmd;
434 hwif->dma_start = tmp_hwif->dma_start;
435 hwif->ide_dma_end = tmp_hwif->ide_dma_end;
436 hwif->ide_dma_test_irq = tmp_hwif->ide_dma_test_irq;
437 hwif->ide_dma_clear_irq = tmp_hwif->ide_dma_clear_irq;
438 hwif->dma_lost_irq = tmp_hwif->dma_lost_irq;
439 hwif->dma_timeout = tmp_hwif->dma_timeout;
440
441 hwif->OUTB = tmp_hwif->OUTB;
442 hwif->OUTBSYNC = tmp_hwif->OUTBSYNC;
443 hwif->OUTW = tmp_hwif->OUTW;
444 hwif->OUTSW = tmp_hwif->OUTSW;
445 hwif->OUTSL = tmp_hwif->OUTSL;
446
447 hwif->INB = tmp_hwif->INB;
448 hwif->INW = tmp_hwif->INW;
449 hwif->INSW = tmp_hwif->INSW;
450 hwif->INSL = tmp_hwif->INSL;
451
452 hwif->sg_max_nents = tmp_hwif->sg_max_nents;
453
454 hwif->mmio = tmp_hwif->mmio;
455 hwif->rqsize = tmp_hwif->rqsize;
456
457 #ifndef CONFIG_BLK_DEV_IDECS
458 hwif->irq = tmp_hwif->irq;
459 #endif
460
461 hwif->dma_base = tmp_hwif->dma_base;
462 hwif->dma_command = tmp_hwif->dma_command;
463 hwif->dma_vendor1 = tmp_hwif->dma_vendor1;
464 hwif->dma_status = tmp_hwif->dma_status;
465 hwif->dma_vendor3 = tmp_hwif->dma_vendor3;
466 hwif->dma_prdtable = tmp_hwif->dma_prdtable;
467
468 hwif->config_data = tmp_hwif->config_data;
469 hwif->select_data = tmp_hwif->select_data;
470 hwif->extra_base = tmp_hwif->extra_base;
471 hwif->extra_ports = tmp_hwif->extra_ports;
472
473 hwif->hwif_data = tmp_hwif->hwif_data;
474 }
475
476 /**
477 * ide_unregister - free an IDE interface
478 * @index: index of interface (will change soon to a pointer)
479 *
480 * Perform the final unregister of an IDE interface. At the moment
481 * we don't refcount interfaces so this will also get split up.
482 *
483 * Locking:
484 * The caller must not hold the IDE locks
485 * The drive present/vanishing is not yet properly locked
486 * Take care with the callbacks. These have been split to avoid
487 * deadlocking the IDE layer. The shutdown callback is called
488 * before we take the lock and free resources. It is up to the
489 * caller to be sure there is no pending I/O here, and that
490 * the interface will not be reopened (present/vanishing locking
491 * isn't yet done BTW). After we commit to the final kill we
492 * call the cleanup callback with the ide locks held.
493 *
494 * Unregister restores the hwif structures to the default state.
495 * This is raving bonkers.
496 */
497
498 void ide_unregister(unsigned int index)
499 {
500 ide_drive_t *drive;
501 ide_hwif_t *hwif, *g;
502 static ide_hwif_t tmp_hwif; /* protected by ide_cfg_mtx */
503 ide_hwgroup_t *hwgroup;
504 int irq_count = 0, unit;
505
506 BUG_ON(index >= MAX_HWIFS);
507
508 BUG_ON(in_interrupt());
509 BUG_ON(irqs_disabled());
510 mutex_lock(&ide_cfg_mtx);
511 spin_lock_irq(&ide_lock);
512 hwif = &ide_hwifs[index];
513 if (!hwif->present)
514 goto abort;
515 for (unit = 0; unit < MAX_DRIVES; ++unit) {
516 drive = &hwif->drives[unit];
517 if (!drive->present)
518 continue;
519 spin_unlock_irq(&ide_lock);
520 device_unregister(&drive->gendev);
521 wait_for_completion(&drive->gendev_rel_comp);
522 spin_lock_irq(&ide_lock);
523 }
524 hwif->present = 0;
525
526 spin_unlock_irq(&ide_lock);
527
528 ide_proc_unregister_port(hwif);
529
530 hwgroup = hwif->hwgroup;
531 /*
532 * free the irq if we were the only hwif using it
533 */
534 g = hwgroup->hwif;
535 do {
536 if (g->irq == hwif->irq)
537 ++irq_count;
538 g = g->next;
539 } while (g != hwgroup->hwif);
540 if (irq_count == 1)
541 free_irq(hwif->irq, hwgroup);
542
543 spin_lock_irq(&ide_lock);
544 /*
545 * Note that we only release the standard ports,
546 * and do not even try to handle any extra ports
547 * allocated for weird IDE interface chipsets.
548 */
549 ide_hwif_release_regions(hwif);
550
551 /*
552 * Remove us from the hwgroup, and free
553 * the hwgroup if we were the only member
554 */
555 if (hwif->next == hwif) {
556 BUG_ON(hwgroup->hwif != hwif);
557 kfree(hwgroup);
558 } else {
559 /* There is another interface in hwgroup.
560 * Unlink us, and set hwgroup->drive and ->hwif to
561 * something sane.
562 */
563 g = hwgroup->hwif;
564 while (g->next != hwif)
565 g = g->next;
566 g->next = hwif->next;
567 if (hwgroup->hwif == hwif) {
568 /* Chose a random hwif for hwgroup->hwif.
569 * It's guaranteed that there are no drives
570 * left in the hwgroup.
571 */
572 BUG_ON(hwgroup->drive != NULL);
573 hwgroup->hwif = g;
574 }
575 BUG_ON(hwgroup->hwif == hwif);
576 }
577
578 /* More messed up locking ... */
579 spin_unlock_irq(&ide_lock);
580 device_unregister(&hwif->gendev);
581 wait_for_completion(&hwif->gendev_rel_comp);
582
583 /*
584 * Remove us from the kernel's knowledge
585 */
586 blk_unregister_region(MKDEV(hwif->major, 0), MAX_DRIVES<<PARTN_BITS);
587 kfree(hwif->sg_table);
588 unregister_blkdev(hwif->major, hwif->name);
589 spin_lock_irq(&ide_lock);
590
591 if (hwif->dma_base) {
592 (void) ide_release_dma(hwif);
593
594 hwif->dma_base = 0;
595 hwif->dma_command = 0;
596 hwif->dma_vendor1 = 0;
597 hwif->dma_status = 0;
598 hwif->dma_vendor3 = 0;
599 hwif->dma_prdtable = 0;
600
601 hwif->extra_base = 0;
602 hwif->extra_ports = 0;
603 }
604
605 /* copy original settings */
606 tmp_hwif = *hwif;
607
608 /* restore hwif data to pristine status */
609 ide_init_port_data(hwif, index);
610 init_hwif_default(hwif, index);
611
612 ide_hwif_restore(hwif, &tmp_hwif);
613
614 abort:
615 spin_unlock_irq(&ide_lock);
616 mutex_unlock(&ide_cfg_mtx);
617 }
618
619 EXPORT_SYMBOL(ide_unregister);
620
621
622 /**
623 * ide_setup_ports - set up IDE interface ports
624 * @hw: register descriptions
625 * @base: base register
626 * @offsets: table of register offsets
627 * @ctrl: control register
628 * @ack_irq: IRQ ack
629 * @irq: interrupt lie
630 *
631 * Setup hw_regs_t structure described by parameters. You
632 * may set up the hw structure yourself OR use this routine to
633 * do it for you. This is basically a helper
634 *
635 */
636
637 void ide_setup_ports ( hw_regs_t *hw,
638 unsigned long base, int *offsets,
639 unsigned long ctrl, unsigned long intr,
640 ide_ack_intr_t *ack_intr,
641 /*
642 * ide_io_ops_t *iops,
643 */
644 int irq)
645 {
646 int i;
647
648 memset(hw, 0, sizeof(hw_regs_t));
649 for (i = 0; i < IDE_NR_PORTS; i++) {
650 if (offsets[i] == -1) {
651 switch(i) {
652 case IDE_CONTROL_OFFSET:
653 hw->io_ports[i] = ctrl;
654 break;
655 #if defined(CONFIG_AMIGA) || defined(CONFIG_MAC)
656 case IDE_IRQ_OFFSET:
657 hw->io_ports[i] = intr;
658 break;
659 #endif /* (CONFIG_AMIGA) || (CONFIG_MAC) */
660 default:
661 hw->io_ports[i] = 0;
662 break;
663 }
664 } else {
665 hw->io_ports[i] = base + offsets[i];
666 }
667 }
668 hw->irq = irq;
669 hw->ack_intr = ack_intr;
670 /*
671 * hw->iops = iops;
672 */
673 }
674
675 void ide_init_port_hw(ide_hwif_t *hwif, hw_regs_t *hw)
676 {
677 memcpy(hwif->io_ports, hw->io_ports, sizeof(hwif->io_ports));
678 hwif->irq = hw->irq;
679 hwif->noprobe = 0;
680 hwif->chipset = hw->chipset;
681 hwif->gendev.parent = hw->dev;
682 hwif->ack_intr = hw->ack_intr;
683 }
684 EXPORT_SYMBOL_GPL(ide_init_port_hw);
685
686 /**
687 * ide_register_hw - register IDE interface
688 * @hw: hardware registers
689 * @quirkproc: quirkproc function
690 * @hwifp: pointer to returned hwif
691 *
692 * Register an IDE interface, specifying exactly the registers etc.
693 *
694 * Returns -1 on error.
695 */
696
697 int ide_register_hw(hw_regs_t *hw, void (*quirkproc)(ide_drive_t *),
698 ide_hwif_t **hwifp)
699 {
700 int index, retry = 1;
701 ide_hwif_t *hwif;
702 u8 idx[4] = { 0xff, 0xff, 0xff, 0xff };
703
704 do {
705 for (index = 0; index < MAX_HWIFS; ++index) {
706 hwif = &ide_hwifs[index];
707 if (hwif->io_ports[IDE_DATA_OFFSET] == hw->io_ports[IDE_DATA_OFFSET])
708 goto found;
709 }
710 for (index = 0; index < MAX_HWIFS; ++index) {
711 hwif = &ide_hwifs[index];
712 if (hwif->hold)
713 continue;
714 if (!hwif->present && hwif->mate == NULL)
715 goto found;
716 }
717 for (index = 0; index < MAX_HWIFS; index++)
718 ide_unregister(index);
719 } while (retry--);
720 return -1;
721 found:
722 if (hwif->present)
723 ide_unregister(index);
724 else if (!hwif->hold) {
725 ide_init_port_data(hwif, index);
726 init_hwif_default(hwif, index);
727 }
728 if (hwif->present)
729 return -1;
730
731 ide_init_port_hw(hwif, hw);
732 hwif->quirkproc = quirkproc;
733
734 idx[0] = index;
735
736 ide_device_add(idx);
737
738 if (hwifp)
739 *hwifp = hwif;
740
741 return hwif->present ? index : -1;
742 }
743
744 EXPORT_SYMBOL(ide_register_hw);
745
746 /*
747 * Locks for IDE setting functionality
748 */
749
750 DEFINE_MUTEX(ide_setting_mtx);
751
752 EXPORT_SYMBOL_GPL(ide_setting_mtx);
753
754 /**
755 * ide_spin_wait_hwgroup - wait for group
756 * @drive: drive in the group
757 *
758 * Wait for an IDE device group to go non busy and then return
759 * holding the ide_lock which guards the hwgroup->busy status
760 * and right to use it.
761 */
762
763 int ide_spin_wait_hwgroup (ide_drive_t *drive)
764 {
765 ide_hwgroup_t *hwgroup = HWGROUP(drive);
766 unsigned long timeout = jiffies + (3 * HZ);
767
768 spin_lock_irq(&ide_lock);
769
770 while (hwgroup->busy) {
771 unsigned long lflags;
772 spin_unlock_irq(&ide_lock);
773 local_irq_set(lflags);
774 if (time_after(jiffies, timeout)) {
775 local_irq_restore(lflags);
776 printk(KERN_ERR "%s: channel busy\n", drive->name);
777 return -EBUSY;
778 }
779 local_irq_restore(lflags);
780 spin_lock_irq(&ide_lock);
781 }
782 return 0;
783 }
784
785 EXPORT_SYMBOL(ide_spin_wait_hwgroup);
786
787 int set_io_32bit(ide_drive_t *drive, int arg)
788 {
789 if (drive->no_io_32bit)
790 return -EPERM;
791
792 if (arg < 0 || arg > 1 + (SUPPORT_VLB_SYNC << 1))
793 return -EINVAL;
794
795 if (ide_spin_wait_hwgroup(drive))
796 return -EBUSY;
797
798 drive->io_32bit = arg;
799 #ifdef CONFIG_BLK_DEV_DTC2278
800 if (HWIF(drive)->chipset == ide_dtc2278)
801 HWIF(drive)->drives[!drive->select.b.unit].io_32bit = arg;
802 #endif /* CONFIG_BLK_DEV_DTC2278 */
803
804 spin_unlock_irq(&ide_lock);
805
806 return 0;
807 }
808
809 static int set_ksettings(ide_drive_t *drive, int arg)
810 {
811 if (arg < 0 || arg > 1)
812 return -EINVAL;
813
814 if (ide_spin_wait_hwgroup(drive))
815 return -EBUSY;
816 drive->keep_settings = arg;
817 spin_unlock_irq(&ide_lock);
818
819 return 0;
820 }
821
822 int set_using_dma(ide_drive_t *drive, int arg)
823 {
824 #ifdef CONFIG_BLK_DEV_IDEDMA
825 ide_hwif_t *hwif = drive->hwif;
826 int err = -EPERM;
827
828 if (arg < 0 || arg > 1)
829 return -EINVAL;
830
831 if (!drive->id || !(drive->id->capability & 1))
832 goto out;
833
834 if (hwif->dma_host_set == NULL)
835 goto out;
836
837 err = -EBUSY;
838 if (ide_spin_wait_hwgroup(drive))
839 goto out;
840 /*
841 * set ->busy flag, unlock and let it ride
842 */
843 hwif->hwgroup->busy = 1;
844 spin_unlock_irq(&ide_lock);
845
846 err = 0;
847
848 if (arg) {
849 if (ide_set_dma(drive))
850 err = -EIO;
851 } else
852 ide_dma_off(drive);
853
854 /*
855 * lock, clear ->busy flag and unlock before leaving
856 */
857 spin_lock_irq(&ide_lock);
858 hwif->hwgroup->busy = 0;
859 spin_unlock_irq(&ide_lock);
860 out:
861 return err;
862 #else
863 if (arg < 0 || arg > 1)
864 return -EINVAL;
865
866 return -EPERM;
867 #endif
868 }
869
870 int set_pio_mode(ide_drive_t *drive, int arg)
871 {
872 struct request rq;
873
874 if (arg < 0 || arg > 255)
875 return -EINVAL;
876
877 if (drive->hwif->set_pio_mode == NULL)
878 return -ENOSYS;
879
880 if (drive->special.b.set_tune)
881 return -EBUSY;
882
883 ide_init_drive_cmd(&rq);
884 rq.cmd_type = REQ_TYPE_ATA_TASKFILE;
885
886 drive->tune_req = (u8) arg;
887 drive->special.b.set_tune = 1;
888 (void) ide_do_drive_cmd(drive, &rq, ide_wait);
889 return 0;
890 }
891
892 static int set_unmaskirq(ide_drive_t *drive, int arg)
893 {
894 if (drive->no_unmask)
895 return -EPERM;
896
897 if (arg < 0 || arg > 1)
898 return -EINVAL;
899
900 if (ide_spin_wait_hwgroup(drive))
901 return -EBUSY;
902 drive->unmask = arg;
903 spin_unlock_irq(&ide_lock);
904
905 return 0;
906 }
907
908 /**
909 * system_bus_clock - clock guess
910 *
911 * External version of the bus clock guess used by very old IDE drivers
912 * for things like VLB timings. Should not be used.
913 */
914
915 int system_bus_clock (void)
916 {
917 return((int) ((!system_bus_speed) ? ide_system_bus_speed() : system_bus_speed ));
918 }
919
920 EXPORT_SYMBOL(system_bus_clock);
921
922 static int generic_ide_suspend(struct device *dev, pm_message_t mesg)
923 {
924 ide_drive_t *drive = dev->driver_data;
925 ide_hwif_t *hwif = HWIF(drive);
926 struct request rq;
927 struct request_pm_state rqpm;
928 ide_task_t args;
929 int ret;
930
931 /* Call ACPI _GTM only once */
932 if (!(drive->dn % 2))
933 ide_acpi_get_timing(hwif);
934
935 memset(&rq, 0, sizeof(rq));
936 memset(&rqpm, 0, sizeof(rqpm));
937 memset(&args, 0, sizeof(args));
938 rq.cmd_type = REQ_TYPE_PM_SUSPEND;
939 rq.special = &args;
940 rq.data = &rqpm;
941 rqpm.pm_step = ide_pm_state_start_suspend;
942 if (mesg.event == PM_EVENT_PRETHAW)
943 mesg.event = PM_EVENT_FREEZE;
944 rqpm.pm_state = mesg.event;
945
946 ret = ide_do_drive_cmd(drive, &rq, ide_wait);
947 /* only call ACPI _PS3 after both drivers are suspended */
948 if (!ret && (((drive->dn % 2) && hwif->drives[0].present
949 && hwif->drives[1].present)
950 || !hwif->drives[0].present
951 || !hwif->drives[1].present))
952 ide_acpi_set_state(hwif, 0);
953 return ret;
954 }
955
956 static int generic_ide_resume(struct device *dev)
957 {
958 ide_drive_t *drive = dev->driver_data;
959 ide_hwif_t *hwif = HWIF(drive);
960 struct request rq;
961 struct request_pm_state rqpm;
962 ide_task_t args;
963 int err;
964
965 /* Call ACPI _STM only once */
966 if (!(drive->dn % 2)) {
967 ide_acpi_set_state(hwif, 1);
968 ide_acpi_push_timing(hwif);
969 }
970
971 ide_acpi_exec_tfs(drive);
972
973 memset(&rq, 0, sizeof(rq));
974 memset(&rqpm, 0, sizeof(rqpm));
975 memset(&args, 0, sizeof(args));
976 rq.cmd_type = REQ_TYPE_PM_RESUME;
977 rq.special = &args;
978 rq.data = &rqpm;
979 rqpm.pm_step = ide_pm_state_start_resume;
980 rqpm.pm_state = PM_EVENT_ON;
981
982 err = ide_do_drive_cmd(drive, &rq, ide_head_wait);
983
984 if (err == 0 && dev->driver) {
985 ide_driver_t *drv = to_ide_driver(dev->driver);
986
987 if (drv->resume)
988 drv->resume(drive);
989 }
990
991 return err;
992 }
993
994 int generic_ide_ioctl(ide_drive_t *drive, struct file *file, struct block_device *bdev,
995 unsigned int cmd, unsigned long arg)
996 {
997 unsigned long flags;
998 ide_driver_t *drv;
999 void __user *p = (void __user *)arg;
1000 int err = 0, (*setfunc)(ide_drive_t *, int);
1001 u8 *val;
1002
1003 switch (cmd) {
1004 case HDIO_GET_32BIT: val = &drive->io_32bit; goto read_val;
1005 case HDIO_GET_KEEPSETTINGS: val = &drive->keep_settings; goto read_val;
1006 case HDIO_GET_UNMASKINTR: val = &drive->unmask; goto read_val;
1007 case HDIO_GET_DMA: val = &drive->using_dma; goto read_val;
1008 case HDIO_SET_32BIT: setfunc = set_io_32bit; goto set_val;
1009 case HDIO_SET_KEEPSETTINGS: setfunc = set_ksettings; goto set_val;
1010 case HDIO_SET_PIO_MODE: setfunc = set_pio_mode; goto set_val;
1011 case HDIO_SET_UNMASKINTR: setfunc = set_unmaskirq; goto set_val;
1012 case HDIO_SET_DMA: setfunc = set_using_dma; goto set_val;
1013 }
1014
1015 switch (cmd) {
1016 case HDIO_OBSOLETE_IDENTITY:
1017 case HDIO_GET_IDENTITY:
1018 if (bdev != bdev->bd_contains)
1019 return -EINVAL;
1020 if (drive->id_read == 0)
1021 return -ENOMSG;
1022 if (copy_to_user(p, drive->id, (cmd == HDIO_GET_IDENTITY) ? sizeof(*drive->id) : 142))
1023 return -EFAULT;
1024 return 0;
1025
1026 case HDIO_GET_NICE:
1027 return put_user(drive->dsc_overlap << IDE_NICE_DSC_OVERLAP |
1028 drive->atapi_overlap << IDE_NICE_ATAPI_OVERLAP |
1029 drive->nice0 << IDE_NICE_0 |
1030 drive->nice1 << IDE_NICE_1 |
1031 drive->nice2 << IDE_NICE_2,
1032 (long __user *) arg);
1033
1034 #ifdef CONFIG_IDE_TASK_IOCTL
1035 case HDIO_DRIVE_TASKFILE:
1036 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
1037 return -EACCES;
1038 switch(drive->media) {
1039 case ide_disk:
1040 return ide_taskfile_ioctl(drive, cmd, arg);
1041 default:
1042 return -ENOMSG;
1043 }
1044 #endif /* CONFIG_IDE_TASK_IOCTL */
1045
1046 case HDIO_DRIVE_CMD:
1047 if (!capable(CAP_SYS_RAWIO))
1048 return -EACCES;
1049 return ide_cmd_ioctl(drive, cmd, arg);
1050
1051 case HDIO_DRIVE_TASK:
1052 if (!capable(CAP_SYS_RAWIO))
1053 return -EACCES;
1054 return ide_task_ioctl(drive, cmd, arg);
1055
1056 case HDIO_SCAN_HWIF:
1057 {
1058 hw_regs_t hw;
1059 int args[3];
1060 if (!capable(CAP_SYS_RAWIO)) return -EACCES;
1061 if (copy_from_user(args, p, 3 * sizeof(int)))
1062 return -EFAULT;
1063 memset(&hw, 0, sizeof(hw));
1064 ide_init_hwif_ports(&hw, (unsigned long) args[0],
1065 (unsigned long) args[1], NULL);
1066 hw.irq = args[2];
1067 if (ide_register_hw(&hw, NULL, NULL) == -1)
1068 return -EIO;
1069 return 0;
1070 }
1071 case HDIO_UNREGISTER_HWIF:
1072 if (!capable(CAP_SYS_RAWIO)) return -EACCES;
1073 /* (arg > MAX_HWIFS) checked in function */
1074 ide_unregister(arg);
1075 return 0;
1076 case HDIO_SET_NICE:
1077 if (!capable(CAP_SYS_ADMIN)) return -EACCES;
1078 if (arg != (arg & ((1 << IDE_NICE_DSC_OVERLAP) | (1 << IDE_NICE_1))))
1079 return -EPERM;
1080 drive->dsc_overlap = (arg >> IDE_NICE_DSC_OVERLAP) & 1;
1081 drv = *(ide_driver_t **)bdev->bd_disk->private_data;
1082 if (drive->dsc_overlap && !drv->supports_dsc_overlap) {
1083 drive->dsc_overlap = 0;
1084 return -EPERM;
1085 }
1086 drive->nice1 = (arg >> IDE_NICE_1) & 1;
1087 return 0;
1088 case HDIO_DRIVE_RESET:
1089 {
1090 unsigned long flags;
1091 if (!capable(CAP_SYS_ADMIN)) return -EACCES;
1092
1093 /*
1094 * Abort the current command on the
1095 * group if there is one, taking
1096 * care not to allow anything else
1097 * to be queued and to die on the
1098 * spot if we miss one somehow
1099 */
1100
1101 spin_lock_irqsave(&ide_lock, flags);
1102
1103 if (HWGROUP(drive)->resetting) {
1104 spin_unlock_irqrestore(&ide_lock, flags);
1105 return -EBUSY;
1106 }
1107
1108 ide_abort(drive, "drive reset");
1109
1110 BUG_ON(HWGROUP(drive)->handler);
1111
1112 /* Ensure nothing gets queued after we
1113 drop the lock. Reset will clear the busy */
1114
1115 HWGROUP(drive)->busy = 1;
1116 spin_unlock_irqrestore(&ide_lock, flags);
1117 (void) ide_do_reset(drive);
1118
1119 return 0;
1120 }
1121
1122 case HDIO_GET_BUSSTATE:
1123 if (!capable(CAP_SYS_ADMIN))
1124 return -EACCES;
1125 if (put_user(HWIF(drive)->bus_state, (long __user *)arg))
1126 return -EFAULT;
1127 return 0;
1128
1129 case HDIO_SET_BUSSTATE:
1130 if (!capable(CAP_SYS_ADMIN))
1131 return -EACCES;
1132 if (HWIF(drive)->busproc)
1133 return HWIF(drive)->busproc(drive, (int)arg);
1134 return -EOPNOTSUPP;
1135 default:
1136 return -EINVAL;
1137 }
1138
1139 read_val:
1140 mutex_lock(&ide_setting_mtx);
1141 spin_lock_irqsave(&ide_lock, flags);
1142 err = *val;
1143 spin_unlock_irqrestore(&ide_lock, flags);
1144 mutex_unlock(&ide_setting_mtx);
1145 return err >= 0 ? put_user(err, (long __user *)arg) : err;
1146
1147 set_val:
1148 if (bdev != bdev->bd_contains)
1149 err = -EINVAL;
1150 else {
1151 if (!capable(CAP_SYS_ADMIN))
1152 err = -EACCES;
1153 else {
1154 mutex_lock(&ide_setting_mtx);
1155 err = setfunc(drive, arg);
1156 mutex_unlock(&ide_setting_mtx);
1157 }
1158 }
1159 return err;
1160 }
1161
1162 EXPORT_SYMBOL(generic_ide_ioctl);
1163
1164 /*
1165 * stridx() returns the offset of c within s,
1166 * or -1 if c is '\0' or not found within s.
1167 */
1168 static int __init stridx (const char *s, char c)
1169 {
1170 char *i = strchr(s, c);
1171 return (i && c) ? i - s : -1;
1172 }
1173
1174 /*
1175 * match_parm() does parsing for ide_setup():
1176 *
1177 * 1. the first char of s must be '='.
1178 * 2. if the remainder matches one of the supplied keywords,
1179 * the index (1 based) of the keyword is negated and returned.
1180 * 3. if the remainder is a series of no more than max_vals numbers
1181 * separated by commas, the numbers are saved in vals[] and a
1182 * count of how many were saved is returned. Base10 is assumed,
1183 * and base16 is allowed when prefixed with "0x".
1184 * 4. otherwise, zero is returned.
1185 */
1186 static int __init match_parm (char *s, const char *keywords[], int vals[], int max_vals)
1187 {
1188 static const char *decimal = "0123456789";
1189 static const char *hex = "0123456789abcdef";
1190 int i, n;
1191
1192 if (*s++ == '=') {
1193 /*
1194 * Try matching against the supplied keywords,
1195 * and return -(index+1) if we match one
1196 */
1197 if (keywords != NULL) {
1198 for (i = 0; *keywords != NULL; ++i) {
1199 if (!strcmp(s, *keywords++))
1200 return -(i+1);
1201 }
1202 }
1203 /*
1204 * Look for a series of no more than "max_vals"
1205 * numeric values separated by commas, in base10,
1206 * or base16 when prefixed with "0x".
1207 * Return a count of how many were found.
1208 */
1209 for (n = 0; (i = stridx(decimal, *s)) >= 0;) {
1210 vals[n] = i;
1211 while ((i = stridx(decimal, *++s)) >= 0)
1212 vals[n] = (vals[n] * 10) + i;
1213 if (*s == 'x' && !vals[n]) {
1214 while ((i = stridx(hex, *++s)) >= 0)
1215 vals[n] = (vals[n] * 0x10) + i;
1216 }
1217 if (++n == max_vals)
1218 break;
1219 if (*s == ',' || *s == ';')
1220 ++s;
1221 }
1222 if (!*s)
1223 return n;
1224 }
1225 return 0; /* zero = nothing matched */
1226 }
1227
1228 extern int probe_ali14xx;
1229 extern int probe_umc8672;
1230 extern int probe_dtc2278;
1231 extern int probe_ht6560b;
1232 extern int probe_qd65xx;
1233 extern int cmd640_vlb;
1234
1235 static int __initdata is_chipset_set[MAX_HWIFS];
1236
1237 /*
1238 * ide_setup() gets called VERY EARLY during initialization,
1239 * to handle kernel "command line" strings beginning with "hdx=" or "ide".
1240 *
1241 * Remember to update Documentation/ide.txt if you change something here.
1242 */
1243 static int __init ide_setup(char *s)
1244 {
1245 int i, vals[3];
1246 ide_hwif_t *hwif;
1247 ide_drive_t *drive;
1248 unsigned int hw, unit;
1249 const char max_drive = 'a' + ((MAX_HWIFS * MAX_DRIVES) - 1);
1250 const char max_hwif = '0' + (MAX_HWIFS - 1);
1251
1252
1253 if (strncmp(s,"hd",2) == 0 && s[2] == '=') /* hd= is for hd.c */
1254 return 0; /* driver and not us */
1255
1256 if (strncmp(s,"ide",3) && strncmp(s,"idebus",6) && strncmp(s,"hd",2))
1257 return 0;
1258
1259 printk(KERN_INFO "ide_setup: %s", s);
1260 init_ide_data ();
1261
1262 #ifdef CONFIG_BLK_DEV_IDEDOUBLER
1263 if (!strcmp(s, "ide=doubler")) {
1264 extern int ide_doubler;
1265
1266 printk(" : Enabled support for IDE doublers\n");
1267 ide_doubler = 1;
1268 return 1;
1269 }
1270 #endif /* CONFIG_BLK_DEV_IDEDOUBLER */
1271
1272 if (!strcmp(s, "ide=nodma")) {
1273 printk(" : Prevented DMA\n");
1274 noautodma = 1;
1275 goto obsolete_option;
1276 }
1277
1278 #ifdef CONFIG_IDEPCI_PCIBUS_ORDER
1279 if (!strcmp(s, "ide=reverse")) {
1280 ide_scan_direction = 1;
1281 printk(" : Enabled support for IDE inverse scan order.\n");
1282 return 1;
1283 }
1284 #endif
1285
1286 #ifdef CONFIG_BLK_DEV_IDEACPI
1287 if (!strcmp(s, "ide=noacpi")) {
1288 //printk(" : Disable IDE ACPI support.\n");
1289 ide_noacpi = 1;
1290 return 1;
1291 }
1292 if (!strcmp(s, "ide=acpigtf")) {
1293 //printk(" : Enable IDE ACPI _GTF support.\n");
1294 ide_noacpitfs = 0;
1295 return 1;
1296 }
1297 if (!strcmp(s, "ide=acpionboot")) {
1298 //printk(" : Call IDE ACPI methods on boot.\n");
1299 ide_noacpionboot = 0;
1300 return 1;
1301 }
1302 #endif /* CONFIG_BLK_DEV_IDEACPI */
1303
1304 /*
1305 * Look for drive options: "hdx="
1306 */
1307 if (s[0] == 'h' && s[1] == 'd' && s[2] >= 'a' && s[2] <= max_drive) {
1308 const char *hd_words[] = {
1309 "none", "noprobe", "nowerr", "cdrom", "nodma",
1310 "autotune", "noautotune", "-8", "-9", "-10",
1311 "noflush", "remap", "remap63", "scsi", NULL };
1312 unit = s[2] - 'a';
1313 hw = unit / MAX_DRIVES;
1314 unit = unit % MAX_DRIVES;
1315 hwif = &ide_hwifs[hw];
1316 drive = &hwif->drives[unit];
1317 if (strncmp(s + 4, "ide-", 4) == 0) {
1318 strlcpy(drive->driver_req, s + 4, sizeof(drive->driver_req));
1319 goto done;
1320 }
1321 switch (match_parm(&s[3], hd_words, vals, 3)) {
1322 case -1: /* "none" */
1323 case -2: /* "noprobe" */
1324 drive->noprobe = 1;
1325 goto done;
1326 case -3: /* "nowerr" */
1327 drive->bad_wstat = BAD_R_STAT;
1328 hwif->noprobe = 0;
1329 goto done;
1330 case -4: /* "cdrom" */
1331 drive->present = 1;
1332 drive->media = ide_cdrom;
1333 /* an ATAPI device ignores DRDY */
1334 drive->ready_stat = 0;
1335 hwif->noprobe = 0;
1336 goto done;
1337 case -5: /* nodma */
1338 drive->nodma = 1;
1339 goto done;
1340 case -6: /* "autotune" */
1341 drive->autotune = IDE_TUNE_AUTO;
1342 goto obsolete_option;
1343 case -7: /* "noautotune" */
1344 drive->autotune = IDE_TUNE_NOAUTO;
1345 goto obsolete_option;
1346 case -11: /* noflush */
1347 drive->noflush = 1;
1348 goto done;
1349 case -12: /* "remap" */
1350 drive->remap_0_to_1 = 1;
1351 goto done;
1352 case -13: /* "remap63" */
1353 drive->sect0 = 63;
1354 goto done;
1355 case -14: /* "scsi" */
1356 drive->scsi = 1;
1357 goto done;
1358 case 3: /* cyl,head,sect */
1359 drive->media = ide_disk;
1360 drive->ready_stat = READY_STAT;
1361 drive->cyl = drive->bios_cyl = vals[0];
1362 drive->head = drive->bios_head = vals[1];
1363 drive->sect = drive->bios_sect = vals[2];
1364 drive->present = 1;
1365 drive->forced_geom = 1;
1366 hwif->noprobe = 0;
1367 goto done;
1368 default:
1369 goto bad_option;
1370 }
1371 }
1372
1373 if (s[0] != 'i' || s[1] != 'd' || s[2] != 'e')
1374 goto bad_option;
1375 /*
1376 * Look for bus speed option: "idebus="
1377 */
1378 if (s[3] == 'b' && s[4] == 'u' && s[5] == 's') {
1379 if (match_parm(&s[6], NULL, vals, 1) != 1)
1380 goto bad_option;
1381 if (vals[0] >= 20 && vals[0] <= 66) {
1382 idebus_parameter = vals[0];
1383 } else
1384 printk(" -- BAD BUS SPEED! Expected value from 20 to 66");
1385 goto done;
1386 }
1387 /*
1388 * Look for interface options: "idex="
1389 */
1390 if (s[3] >= '0' && s[3] <= max_hwif) {
1391 /*
1392 * Be VERY CAREFUL changing this: note hardcoded indexes below
1393 * (-8, -9, -10) are reserved to ease the hardcoding.
1394 */
1395 static const char *ide_words[] = {
1396 "noprobe", "serialize", "minus3", "minus4",
1397 "reset", "minus6", "ata66", "minus8", "minus9",
1398 "minus10", "four", "qd65xx", "ht6560b", "cmd640_vlb",
1399 "dtc2278", "umc8672", "ali14xx", NULL };
1400
1401 hw_regs_t hwregs;
1402
1403 hw = s[3] - '0';
1404 hwif = &ide_hwifs[hw];
1405 i = match_parm(&s[4], ide_words, vals, 3);
1406
1407 /*
1408 * Cryptic check to ensure chipset not already set for hwif.
1409 * Note: we can't depend on hwif->chipset here.
1410 */
1411 if ((i >= -18 && i <= -11) || (i > 0 && i <= 3)) {
1412 /* chipset already specified */
1413 if (is_chipset_set[hw])
1414 goto bad_option;
1415 if (i > -18 && i <= -11) {
1416 /* these drivers are for "ide0=" only */
1417 if (hw != 0)
1418 goto bad_hwif;
1419 /* chipset already specified for 2nd port */
1420 if (is_chipset_set[hw+1])
1421 goto bad_option;
1422 }
1423 is_chipset_set[hw] = 1;
1424 printk("\n");
1425 }
1426
1427 switch (i) {
1428 #ifdef CONFIG_BLK_DEV_ALI14XX
1429 case -17: /* "ali14xx" */
1430 probe_ali14xx = 1;
1431 goto done;
1432 #endif
1433 #ifdef CONFIG_BLK_DEV_UMC8672
1434 case -16: /* "umc8672" */
1435 probe_umc8672 = 1;
1436 goto done;
1437 #endif
1438 #ifdef CONFIG_BLK_DEV_DTC2278
1439 case -15: /* "dtc2278" */
1440 probe_dtc2278 = 1;
1441 goto done;
1442 #endif
1443 #ifdef CONFIG_BLK_DEV_CMD640
1444 case -14: /* "cmd640_vlb" */
1445 cmd640_vlb = 1;
1446 goto done;
1447 #endif
1448 #ifdef CONFIG_BLK_DEV_HT6560B
1449 case -13: /* "ht6560b" */
1450 probe_ht6560b = 1;
1451 goto done;
1452 #endif
1453 #ifdef CONFIG_BLK_DEV_QD65XX
1454 case -12: /* "qd65xx" */
1455 probe_qd65xx = 1;
1456 goto done;
1457 #endif
1458 #ifdef CONFIG_BLK_DEV_4DRIVES
1459 case -11: /* "four" drives on one set of ports */
1460 {
1461 ide_hwif_t *mate = &ide_hwifs[hw^1];
1462 mate->drives[0].select.all ^= 0x20;
1463 mate->drives[1].select.all ^= 0x20;
1464 hwif->chipset = mate->chipset = ide_4drives;
1465 mate->irq = hwif->irq;
1466 memcpy(mate->io_ports, hwif->io_ports, sizeof(hwif->io_ports));
1467 hwif->mate = mate;
1468 mate->mate = hwif;
1469 hwif->serialized = mate->serialized = 1;
1470 goto obsolete_option;
1471 }
1472 #endif /* CONFIG_BLK_DEV_4DRIVES */
1473 case -10: /* minus10 */
1474 case -9: /* minus9 */
1475 case -8: /* minus8 */
1476 case -6:
1477 case -4:
1478 case -3:
1479 goto bad_option;
1480 case -7: /* ata66 */
1481 #ifdef CONFIG_BLK_DEV_IDEPCI
1482 /*
1483 * Use ATA_CBL_PATA40_SHORT so drive side
1484 * cable detection is also overriden.
1485 */
1486 hwif->cbl = ATA_CBL_PATA40_SHORT;
1487 goto obsolete_option;
1488 #else
1489 goto bad_hwif;
1490 #endif
1491 case -5: /* "reset" */
1492 hwif->reset = 1;
1493 goto obsolete_option;
1494 case -2: /* "serialize" */
1495 hwif->mate = &ide_hwifs[hw^1];
1496 hwif->mate->mate = hwif;
1497 hwif->serialized = hwif->mate->serialized = 1;
1498 goto obsolete_option;
1499
1500 case -1: /* "noprobe" */
1501 hwif->noprobe = 1;
1502 goto done;
1503
1504 case 1: /* base */
1505 vals[1] = vals[0] + 0x206; /* default ctl */
1506 case 2: /* base,ctl */
1507 vals[2] = 0; /* default irq = probe for it */
1508 case 3: /* base,ctl,irq */
1509 memset(&hwregs, 0, sizeof(hwregs));
1510 ide_init_hwif_ports(&hwregs, vals[0], vals[1], &hwif->irq);
1511 memcpy(hwif->io_ports, hwregs.io_ports, sizeof(hwif->io_ports));
1512 hwif->irq = vals[2];
1513 hwif->noprobe = 0;
1514 hwif->chipset = ide_forced;
1515 goto obsolete_option;
1516
1517 case 0: goto bad_option;
1518 default:
1519 printk(" -- SUPPORT NOT CONFIGURED IN THIS KERNEL\n");
1520 return 1;
1521 }
1522 }
1523 bad_option:
1524 printk(" -- BAD OPTION\n");
1525 return 1;
1526 obsolete_option:
1527 printk(" -- OBSOLETE OPTION, WILL BE REMOVED SOON!\n");
1528 return 1;
1529 bad_hwif:
1530 printk("-- NOT SUPPORTED ON ide%d", hw);
1531 done:
1532 printk("\n");
1533 return 1;
1534 }
1535
1536 EXPORT_SYMBOL(ide_lock);
1537
1538 static int ide_bus_match(struct device *dev, struct device_driver *drv)
1539 {
1540 return 1;
1541 }
1542
1543 static char *media_string(ide_drive_t *drive)
1544 {
1545 switch (drive->media) {
1546 case ide_disk:
1547 return "disk";
1548 case ide_cdrom:
1549 return "cdrom";
1550 case ide_tape:
1551 return "tape";
1552 case ide_floppy:
1553 return "floppy";
1554 case ide_optical:
1555 return "optical";
1556 default:
1557 return "UNKNOWN";
1558 }
1559 }
1560
1561 static ssize_t media_show(struct device *dev, struct device_attribute *attr, char *buf)
1562 {
1563 ide_drive_t *drive = to_ide_device(dev);
1564 return sprintf(buf, "%s\n", media_string(drive));
1565 }
1566
1567 static ssize_t drivename_show(struct device *dev, struct device_attribute *attr, char *buf)
1568 {
1569 ide_drive_t *drive = to_ide_device(dev);
1570 return sprintf(buf, "%s\n", drive->name);
1571 }
1572
1573 static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf)
1574 {
1575 ide_drive_t *drive = to_ide_device(dev);
1576 return sprintf(buf, "ide:m-%s\n", media_string(drive));
1577 }
1578
1579 static ssize_t model_show(struct device *dev, struct device_attribute *attr,
1580 char *buf)
1581 {
1582 ide_drive_t *drive = to_ide_device(dev);
1583 return sprintf(buf, "%s\n", drive->id->model);
1584 }
1585
1586 static ssize_t firmware_show(struct device *dev, struct device_attribute *attr,
1587 char *buf)
1588 {
1589 ide_drive_t *drive = to_ide_device(dev);
1590 return sprintf(buf, "%s\n", drive->id->fw_rev);
1591 }
1592
1593 static ssize_t serial_show(struct device *dev, struct device_attribute *attr,
1594 char *buf)
1595 {
1596 ide_drive_t *drive = to_ide_device(dev);
1597 return sprintf(buf, "%s\n", drive->id->serial_no);
1598 }
1599
1600 static struct device_attribute ide_dev_attrs[] = {
1601 __ATTR_RO(media),
1602 __ATTR_RO(drivename),
1603 __ATTR_RO(modalias),
1604 __ATTR_RO(model),
1605 __ATTR_RO(firmware),
1606 __ATTR(serial, 0400, serial_show, NULL),
1607 __ATTR_NULL
1608 };
1609
1610 static int ide_uevent(struct device *dev, struct kobj_uevent_env *env)
1611 {
1612 ide_drive_t *drive = to_ide_device(dev);
1613
1614 add_uevent_var(env, "MEDIA=%s", media_string(drive));
1615 add_uevent_var(env, "DRIVENAME=%s", drive->name);
1616 add_uevent_var(env, "MODALIAS=ide:m-%s", media_string(drive));
1617 return 0;
1618 }
1619
1620 static int generic_ide_probe(struct device *dev)
1621 {
1622 ide_drive_t *drive = to_ide_device(dev);
1623 ide_driver_t *drv = to_ide_driver(dev->driver);
1624
1625 return drv->probe ? drv->probe(drive) : -ENODEV;
1626 }
1627
1628 static int generic_ide_remove(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 (drv->remove)
1634 drv->remove(drive);
1635
1636 return 0;
1637 }
1638
1639 static void generic_ide_shutdown(struct device *dev)
1640 {
1641 ide_drive_t *drive = to_ide_device(dev);
1642 ide_driver_t *drv = to_ide_driver(dev->driver);
1643
1644 if (dev->driver && drv->shutdown)
1645 drv->shutdown(drive);
1646 }
1647
1648 struct bus_type ide_bus_type = {
1649 .name = "ide",
1650 .match = ide_bus_match,
1651 .uevent = ide_uevent,
1652 .probe = generic_ide_probe,
1653 .remove = generic_ide_remove,
1654 .shutdown = generic_ide_shutdown,
1655 .dev_attrs = ide_dev_attrs,
1656 .suspend = generic_ide_suspend,
1657 .resume = generic_ide_resume,
1658 };
1659
1660 EXPORT_SYMBOL_GPL(ide_bus_type);
1661
1662 /*
1663 * This is gets invoked once during initialization, to set *everything* up
1664 */
1665 static int __init ide_init(void)
1666 {
1667 int ret;
1668
1669 printk(KERN_INFO "Uniform Multi-Platform E-IDE driver " REVISION "\n");
1670 system_bus_speed = ide_system_bus_speed();
1671
1672 ret = bus_register(&ide_bus_type);
1673 if (ret < 0) {
1674 printk(KERN_WARNING "IDE: bus_register error: %d\n", ret);
1675 return ret;
1676 }
1677
1678 init_ide_data();
1679
1680 proc_ide_create();
1681
1682 return 0;
1683 }
1684
1685 #ifdef MODULE
1686 static char *options = NULL;
1687 module_param(options, charp, 0);
1688 MODULE_LICENSE("GPL");
1689
1690 static void __init parse_options (char *line)
1691 {
1692 char *next = line;
1693
1694 if (line == NULL || !*line)
1695 return;
1696 while ((line = next) != NULL) {
1697 if ((next = strchr(line,' ')) != NULL)
1698 *next++ = 0;
1699 if (!ide_setup(line))
1700 printk (KERN_INFO "Unknown option '%s'\n", line);
1701 }
1702 }
1703
1704 int __init init_module (void)
1705 {
1706 parse_options(options);
1707 return ide_init();
1708 }
1709
1710 void __exit cleanup_module (void)
1711 {
1712 int index;
1713
1714 for (index = 0; index < MAX_HWIFS; ++index)
1715 ide_unregister(index);
1716
1717 proc_ide_destroy();
1718
1719 bus_unregister(&ide_bus_type);
1720 }
1721
1722 #else /* !MODULE */
1723
1724 __setup("", ide_setup);
1725
1726 module_init(ide_init);
1727
1728 #endif /* MODULE */
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