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ide: remove ->ide_dma_check (take 2)
[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 static int ide_scan_direction; /* THIS was formerly 2.2.x pci=reverse */
99 #endif
100
101 int noautodma = 0;
102
103 EXPORT_SYMBOL(noautodma);
104
105 #ifdef CONFIG_BLK_DEV_IDEACPI
106 int ide_noacpi = 0;
107 int ide_noacpitfs = 1;
108 int ide_noacpionboot = 1;
109 #endif
110
111 /*
112 * This is declared extern in ide.h, for access by other IDE modules:
113 */
114 ide_hwif_t ide_hwifs[MAX_HWIFS]; /* master data repository */
115
116 EXPORT_SYMBOL(ide_hwifs);
117
118 /*
119 * Do not even *think* about calling this!
120 */
121 static void init_hwif_data(ide_hwif_t *hwif, unsigned int index)
122 {
123 unsigned int unit;
124
125 /* bulk initialize hwif & drive info with zeros */
126 memset(hwif, 0, sizeof(ide_hwif_t));
127
128 /* fill in any non-zero initial values */
129 hwif->index = index;
130 hwif->major = ide_hwif_to_major[index];
131
132 hwif->name[0] = 'i';
133 hwif->name[1] = 'd';
134 hwif->name[2] = 'e';
135 hwif->name[3] = '0' + index;
136
137 hwif->bus_state = BUSSTATE_ON;
138
139 hwif->atapi_dma = 0; /* disable all atapi dma */
140
141 init_completion(&hwif->gendev_rel_comp);
142
143 default_hwif_iops(hwif);
144 default_hwif_transport(hwif);
145 for (unit = 0; unit < MAX_DRIVES; ++unit) {
146 ide_drive_t *drive = &hwif->drives[unit];
147
148 drive->media = ide_disk;
149 drive->select.all = (unit<<4)|0xa0;
150 drive->hwif = hwif;
151 drive->ctl = 0x08;
152 drive->ready_stat = READY_STAT;
153 drive->bad_wstat = BAD_W_STAT;
154 drive->special.b.recalibrate = 1;
155 drive->special.b.set_geometry = 1;
156 drive->name[0] = 'h';
157 drive->name[1] = 'd';
158 drive->name[2] = 'a' + (index * MAX_DRIVES) + unit;
159 drive->max_failures = IDE_DEFAULT_MAX_FAILURES;
160 drive->using_dma = 0;
161 drive->vdma = 0;
162 INIT_LIST_HEAD(&drive->list);
163 init_completion(&drive->gendev_rel_comp);
164 }
165 }
166
167 static void init_hwif_default(ide_hwif_t *hwif, unsigned int index)
168 {
169 hw_regs_t hw;
170
171 memset(&hw, 0, sizeof(hw_regs_t));
172
173 ide_init_hwif_ports(&hw, ide_default_io_base(index), 0, &hwif->irq);
174
175 memcpy(&hwif->hw, &hw, sizeof(hw));
176 memcpy(hwif->io_ports, hw.io_ports, sizeof(hw.io_ports));
177
178 hwif->noprobe = !hwif->io_ports[IDE_DATA_OFFSET];
179 #ifdef CONFIG_BLK_DEV_HD
180 if (hwif->io_ports[IDE_DATA_OFFSET] == HD_DATA)
181 hwif->noprobe = 1; /* may be overridden by ide_setup() */
182 #endif
183 }
184
185 extern void ide_arm_init(void);
186
187 /*
188 * init_ide_data() sets reasonable default values into all fields
189 * of all instances of the hwifs and drives, but only on the first call.
190 * Subsequent calls have no effect (they don't wipe out anything).
191 *
192 * This routine is normally called at driver initialization time,
193 * but may also be called MUCH earlier during kernel "command-line"
194 * parameter processing. As such, we cannot depend on any other parts
195 * of the kernel (such as memory allocation) to be functioning yet.
196 *
197 * This is too bad, as otherwise we could dynamically allocate the
198 * ide_drive_t structs as needed, rather than always consuming memory
199 * for the max possible number (MAX_HWIFS * MAX_DRIVES) of them.
200 *
201 * FIXME: We should stuff the setup data into __init and copy the
202 * relevant hwifs/allocate them properly during boot.
203 */
204 #define MAGIC_COOKIE 0x12345678
205 static void __init init_ide_data (void)
206 {
207 ide_hwif_t *hwif;
208 unsigned int index;
209 static unsigned long magic_cookie = MAGIC_COOKIE;
210
211 if (magic_cookie != MAGIC_COOKIE)
212 return; /* already initialized */
213 magic_cookie = 0;
214
215 /* Initialise all interface structures */
216 for (index = 0; index < MAX_HWIFS; ++index) {
217 hwif = &ide_hwifs[index];
218 init_hwif_data(hwif, index);
219 init_hwif_default(hwif, index);
220 #if !defined(CONFIG_PPC32) || !defined(CONFIG_PCI)
221 hwif->irq = hwif->hw.irq =
222 ide_init_default_irq(hwif->io_ports[IDE_DATA_OFFSET]);
223 #endif
224 }
225 #ifdef CONFIG_IDE_ARM
226 ide_arm_init();
227 #endif
228 }
229
230 /**
231 * ide_system_bus_speed - guess bus speed
232 *
233 * ide_system_bus_speed() returns what we think is the system VESA/PCI
234 * bus speed (in MHz). This is used for calculating interface PIO timings.
235 * The default is 40 for known PCI systems, 50 otherwise.
236 * The "idebus=xx" parameter can be used to override this value.
237 * The actual value to be used is computed/displayed the first time
238 * through. Drivers should only use this as a last resort.
239 *
240 * Returns a guessed speed in MHz.
241 */
242
243 static int ide_system_bus_speed(void)
244 {
245 #ifdef CONFIG_PCI
246 static struct pci_device_id pci_default[] = {
247 { PCI_DEVICE(PCI_ANY_ID, PCI_ANY_ID) },
248 { }
249 };
250 #else
251 #define pci_default 0
252 #endif /* CONFIG_PCI */
253
254 if (!system_bus_speed) {
255 if (idebus_parameter) {
256 /* user supplied value */
257 system_bus_speed = idebus_parameter;
258 } else if (pci_dev_present(pci_default)) {
259 /* safe default value for PCI */
260 system_bus_speed = 33;
261 } else {
262 /* safe default value for VESA and PCI */
263 system_bus_speed = 50;
264 }
265 printk(KERN_INFO "ide: Assuming %dMHz system bus speed "
266 "for PIO modes%s\n", system_bus_speed,
267 idebus_parameter ? "" : "; override with idebus=xx");
268 }
269 return system_bus_speed;
270 }
271
272 static struct resource* hwif_request_region(ide_hwif_t *hwif,
273 unsigned long addr, int num)
274 {
275 struct resource *res = request_region(addr, num, hwif->name);
276
277 if (!res)
278 printk(KERN_ERR "%s: I/O resource 0x%lX-0x%lX not free.\n",
279 hwif->name, addr, addr+num-1);
280 return res;
281 }
282
283 /**
284 * ide_hwif_request_regions - request resources for IDE
285 * @hwif: interface to use
286 *
287 * Requests all the needed resources for an interface.
288 * Right now core IDE code does this work which is deeply wrong.
289 * MMIO leaves it to the controller driver,
290 * PIO will migrate this way over time.
291 */
292
293 int ide_hwif_request_regions(ide_hwif_t *hwif)
294 {
295 unsigned long addr;
296 unsigned int i;
297
298 if (hwif->mmio)
299 return 0;
300 addr = hwif->io_ports[IDE_CONTROL_OFFSET];
301 if (addr && !hwif_request_region(hwif, addr, 1))
302 goto control_region_busy;
303 hwif->straight8 = 0;
304 addr = hwif->io_ports[IDE_DATA_OFFSET];
305 if ((addr | 7) == hwif->io_ports[IDE_STATUS_OFFSET]) {
306 if (!hwif_request_region(hwif, addr, 8))
307 goto data_region_busy;
308 hwif->straight8 = 1;
309 return 0;
310 }
311 for (i = IDE_DATA_OFFSET; i <= IDE_STATUS_OFFSET; i++) {
312 addr = hwif->io_ports[i];
313 if (!hwif_request_region(hwif, addr, 1)) {
314 while (--i)
315 release_region(addr, 1);
316 goto data_region_busy;
317 }
318 }
319 return 0;
320
321 data_region_busy:
322 addr = hwif->io_ports[IDE_CONTROL_OFFSET];
323 if (addr)
324 release_region(addr, 1);
325 control_region_busy:
326 /* If any errors are return, we drop the hwif interface. */
327 return -EBUSY;
328 }
329
330 /**
331 * ide_hwif_release_regions - free IDE resources
332 *
333 * Note that we only release the standard ports,
334 * and do not even try to handle any extra ports
335 * allocated for weird IDE interface chipsets.
336 *
337 * Note also that we don't yet handle mmio resources here. More
338 * importantly our caller should be doing this so we need to
339 * restructure this as a helper function for drivers.
340 */
341
342 void ide_hwif_release_regions(ide_hwif_t *hwif)
343 {
344 u32 i = 0;
345
346 if (hwif->mmio)
347 return;
348 if (hwif->io_ports[IDE_CONTROL_OFFSET])
349 release_region(hwif->io_ports[IDE_CONTROL_OFFSET], 1);
350 if (hwif->straight8) {
351 release_region(hwif->io_ports[IDE_DATA_OFFSET], 8);
352 return;
353 }
354 for (i = IDE_DATA_OFFSET; i <= IDE_STATUS_OFFSET; i++)
355 if (hwif->io_ports[i])
356 release_region(hwif->io_ports[i], 1);
357 }
358
359 /**
360 * ide_hwif_restore - restore hwif to template
361 * @hwif: hwif to update
362 * @tmp_hwif: template
363 *
364 * Restore hwif to a previous state by copying most settings
365 * from the template.
366 */
367
368 static void ide_hwif_restore(ide_hwif_t *hwif, ide_hwif_t *tmp_hwif)
369 {
370 hwif->hwgroup = tmp_hwif->hwgroup;
371
372 hwif->gendev.parent = tmp_hwif->gendev.parent;
373
374 hwif->proc = tmp_hwif->proc;
375
376 hwif->major = tmp_hwif->major;
377 hwif->straight8 = tmp_hwif->straight8;
378 hwif->bus_state = tmp_hwif->bus_state;
379
380 hwif->host_flags = tmp_hwif->host_flags;
381
382 hwif->pio_mask = tmp_hwif->pio_mask;
383
384 hwif->atapi_dma = tmp_hwif->atapi_dma;
385 hwif->ultra_mask = tmp_hwif->ultra_mask;
386 hwif->mwdma_mask = tmp_hwif->mwdma_mask;
387 hwif->swdma_mask = tmp_hwif->swdma_mask;
388
389 hwif->cbl = tmp_hwif->cbl;
390
391 hwif->chipset = tmp_hwif->chipset;
392 hwif->hold = tmp_hwif->hold;
393
394 #ifdef CONFIG_BLK_DEV_IDEPCI
395 hwif->pci_dev = tmp_hwif->pci_dev;
396 hwif->cds = tmp_hwif->cds;
397 #endif
398
399 hwif->set_pio_mode = tmp_hwif->set_pio_mode;
400 hwif->set_dma_mode = tmp_hwif->set_dma_mode;
401 hwif->mdma_filter = tmp_hwif->mdma_filter;
402 hwif->udma_filter = tmp_hwif->udma_filter;
403 hwif->selectproc = tmp_hwif->selectproc;
404 hwif->reset_poll = tmp_hwif->reset_poll;
405 hwif->pre_reset = tmp_hwif->pre_reset;
406 hwif->resetproc = tmp_hwif->resetproc;
407 hwif->intrproc = tmp_hwif->intrproc;
408 hwif->maskproc = tmp_hwif->maskproc;
409 hwif->quirkproc = tmp_hwif->quirkproc;
410 hwif->busproc = tmp_hwif->busproc;
411
412 hwif->ata_input_data = tmp_hwif->ata_input_data;
413 hwif->ata_output_data = tmp_hwif->ata_output_data;
414 hwif->atapi_input_bytes = tmp_hwif->atapi_input_bytes;
415 hwif->atapi_output_bytes = tmp_hwif->atapi_output_bytes;
416
417 hwif->dma_setup = tmp_hwif->dma_setup;
418 hwif->dma_exec_cmd = tmp_hwif->dma_exec_cmd;
419 hwif->dma_start = tmp_hwif->dma_start;
420 hwif->ide_dma_end = tmp_hwif->ide_dma_end;
421 hwif->ide_dma_on = tmp_hwif->ide_dma_on;
422 hwif->dma_off_quietly = tmp_hwif->dma_off_quietly;
423 hwif->ide_dma_test_irq = tmp_hwif->ide_dma_test_irq;
424 hwif->ide_dma_clear_irq = tmp_hwif->ide_dma_clear_irq;
425 hwif->dma_host_on = tmp_hwif->dma_host_on;
426 hwif->dma_host_off = tmp_hwif->dma_host_off;
427 hwif->dma_lost_irq = tmp_hwif->dma_lost_irq;
428 hwif->dma_timeout = tmp_hwif->dma_timeout;
429
430 hwif->OUTB = tmp_hwif->OUTB;
431 hwif->OUTBSYNC = tmp_hwif->OUTBSYNC;
432 hwif->OUTW = tmp_hwif->OUTW;
433 hwif->OUTSW = tmp_hwif->OUTSW;
434 hwif->OUTSL = tmp_hwif->OUTSL;
435
436 hwif->INB = tmp_hwif->INB;
437 hwif->INW = tmp_hwif->INW;
438 hwif->INSW = tmp_hwif->INSW;
439 hwif->INSL = tmp_hwif->INSL;
440
441 hwif->sg_max_nents = tmp_hwif->sg_max_nents;
442
443 hwif->mmio = tmp_hwif->mmio;
444 hwif->rqsize = tmp_hwif->rqsize;
445 hwif->no_lba48 = tmp_hwif->no_lba48;
446
447 #ifndef CONFIG_BLK_DEV_IDECS
448 hwif->irq = tmp_hwif->irq;
449 #endif
450
451 hwif->dma_base = tmp_hwif->dma_base;
452 hwif->dma_master = tmp_hwif->dma_master;
453 hwif->dma_command = tmp_hwif->dma_command;
454 hwif->dma_vendor1 = tmp_hwif->dma_vendor1;
455 hwif->dma_status = tmp_hwif->dma_status;
456 hwif->dma_vendor3 = tmp_hwif->dma_vendor3;
457 hwif->dma_prdtable = tmp_hwif->dma_prdtable;
458
459 hwif->config_data = tmp_hwif->config_data;
460 hwif->select_data = tmp_hwif->select_data;
461 hwif->extra_base = tmp_hwif->extra_base;
462 hwif->extra_ports = tmp_hwif->extra_ports;
463 hwif->autodma = tmp_hwif->autodma;
464
465 hwif->hwif_data = tmp_hwif->hwif_data;
466 }
467
468 /**
469 * ide_unregister - free an IDE interface
470 * @index: index of interface (will change soon to a pointer)
471 *
472 * Perform the final unregister of an IDE interface. At the moment
473 * we don't refcount interfaces so this will also get split up.
474 *
475 * Locking:
476 * The caller must not hold the IDE locks
477 * The drive present/vanishing is not yet properly locked
478 * Take care with the callbacks. These have been split to avoid
479 * deadlocking the IDE layer. The shutdown callback is called
480 * before we take the lock and free resources. It is up to the
481 * caller to be sure there is no pending I/O here, and that
482 * the interface will not be reopened (present/vanishing locking
483 * isn't yet done BTW). After we commit to the final kill we
484 * call the cleanup callback with the ide locks held.
485 *
486 * Unregister restores the hwif structures to the default state.
487 * This is raving bonkers.
488 */
489
490 void ide_unregister(unsigned int index)
491 {
492 ide_drive_t *drive;
493 ide_hwif_t *hwif, *g;
494 static ide_hwif_t tmp_hwif; /* protected by ide_cfg_mtx */
495 ide_hwgroup_t *hwgroup;
496 int irq_count = 0, unit;
497
498 BUG_ON(index >= MAX_HWIFS);
499
500 BUG_ON(in_interrupt());
501 BUG_ON(irqs_disabled());
502 mutex_lock(&ide_cfg_mtx);
503 spin_lock_irq(&ide_lock);
504 hwif = &ide_hwifs[index];
505 if (!hwif->present)
506 goto abort;
507 for (unit = 0; unit < MAX_DRIVES; ++unit) {
508 drive = &hwif->drives[unit];
509 if (!drive->present)
510 continue;
511 spin_unlock_irq(&ide_lock);
512 device_unregister(&drive->gendev);
513 wait_for_completion(&drive->gendev_rel_comp);
514 spin_lock_irq(&ide_lock);
515 }
516 hwif->present = 0;
517
518 spin_unlock_irq(&ide_lock);
519
520 ide_proc_unregister_port(hwif);
521
522 hwgroup = hwif->hwgroup;
523 /*
524 * free the irq if we were the only hwif using it
525 */
526 g = hwgroup->hwif;
527 do {
528 if (g->irq == hwif->irq)
529 ++irq_count;
530 g = g->next;
531 } while (g != hwgroup->hwif);
532 if (irq_count == 1)
533 free_irq(hwif->irq, hwgroup);
534
535 spin_lock_irq(&ide_lock);
536 /*
537 * Note that we only release the standard ports,
538 * and do not even try to handle any extra ports
539 * allocated for weird IDE interface chipsets.
540 */
541 ide_hwif_release_regions(hwif);
542
543 /*
544 * Remove us from the hwgroup, and free
545 * the hwgroup if we were the only member
546 */
547 if (hwif->next == hwif) {
548 BUG_ON(hwgroup->hwif != hwif);
549 kfree(hwgroup);
550 } else {
551 /* There is another interface in hwgroup.
552 * Unlink us, and set hwgroup->drive and ->hwif to
553 * something sane.
554 */
555 g = hwgroup->hwif;
556 while (g->next != hwif)
557 g = g->next;
558 g->next = hwif->next;
559 if (hwgroup->hwif == hwif) {
560 /* Chose a random hwif for hwgroup->hwif.
561 * It's guaranteed that there are no drives
562 * left in the hwgroup.
563 */
564 BUG_ON(hwgroup->drive != NULL);
565 hwgroup->hwif = g;
566 }
567 BUG_ON(hwgroup->hwif == hwif);
568 }
569
570 /* More messed up locking ... */
571 spin_unlock_irq(&ide_lock);
572 device_unregister(&hwif->gendev);
573 wait_for_completion(&hwif->gendev_rel_comp);
574
575 /*
576 * Remove us from the kernel's knowledge
577 */
578 blk_unregister_region(MKDEV(hwif->major, 0), MAX_DRIVES<<PARTN_BITS);
579 kfree(hwif->sg_table);
580 unregister_blkdev(hwif->major, hwif->name);
581 spin_lock_irq(&ide_lock);
582
583 if (hwif->dma_base) {
584 (void) ide_release_dma(hwif);
585
586 hwif->dma_base = 0;
587 hwif->dma_master = 0;
588 hwif->dma_command = 0;
589 hwif->dma_vendor1 = 0;
590 hwif->dma_status = 0;
591 hwif->dma_vendor3 = 0;
592 hwif->dma_prdtable = 0;
593
594 hwif->extra_base = 0;
595 hwif->extra_ports = 0;
596 }
597
598 /* copy original settings */
599 tmp_hwif = *hwif;
600
601 /* restore hwif data to pristine status */
602 init_hwif_data(hwif, index);
603 init_hwif_default(hwif, index);
604
605 ide_hwif_restore(hwif, &tmp_hwif);
606
607 abort:
608 spin_unlock_irq(&ide_lock);
609 mutex_unlock(&ide_cfg_mtx);
610 }
611
612 EXPORT_SYMBOL(ide_unregister);
613
614
615 /**
616 * ide_setup_ports - set up IDE interface ports
617 * @hw: register descriptions
618 * @base: base register
619 * @offsets: table of register offsets
620 * @ctrl: control register
621 * @ack_irq: IRQ ack
622 * @irq: interrupt lie
623 *
624 * Setup hw_regs_t structure described by parameters. You
625 * may set up the hw structure yourself OR use this routine to
626 * do it for you. This is basically a helper
627 *
628 */
629
630 void ide_setup_ports ( hw_regs_t *hw,
631 unsigned long base, int *offsets,
632 unsigned long ctrl, unsigned long intr,
633 ide_ack_intr_t *ack_intr,
634 /*
635 * ide_io_ops_t *iops,
636 */
637 int irq)
638 {
639 int i;
640
641 memset(hw, 0, sizeof(hw_regs_t));
642 for (i = 0; i < IDE_NR_PORTS; i++) {
643 if (offsets[i] == -1) {
644 switch(i) {
645 case IDE_CONTROL_OFFSET:
646 hw->io_ports[i] = ctrl;
647 break;
648 #if defined(CONFIG_AMIGA) || defined(CONFIG_MAC)
649 case IDE_IRQ_OFFSET:
650 hw->io_ports[i] = intr;
651 break;
652 #endif /* (CONFIG_AMIGA) || (CONFIG_MAC) */
653 default:
654 hw->io_ports[i] = 0;
655 break;
656 }
657 } else {
658 hw->io_ports[i] = base + offsets[i];
659 }
660 }
661 hw->irq = irq;
662 hw->dma = NO_DMA;
663 hw->ack_intr = ack_intr;
664 /*
665 * hw->iops = iops;
666 */
667 }
668
669 /**
670 * ide_register_hw_with_fixup - register IDE interface
671 * @hw: hardware registers
672 * @initializing: set while initializing built-in drivers
673 * @hwifp: pointer to returned hwif
674 * @fixup: fixup function
675 *
676 * Register an IDE interface, specifying exactly the registers etc.
677 * Set init=1 iff calling before probes have taken place.
678 *
679 * Returns -1 on error.
680 */
681
682 int ide_register_hw_with_fixup(hw_regs_t *hw, int initializing,
683 ide_hwif_t **hwifp,
684 void(*fixup)(ide_hwif_t *hwif))
685 {
686 int index, retry = 1;
687 ide_hwif_t *hwif;
688
689 do {
690 for (index = 0; index < MAX_HWIFS; ++index) {
691 hwif = &ide_hwifs[index];
692 if (hwif->hw.io_ports[IDE_DATA_OFFSET] == hw->io_ports[IDE_DATA_OFFSET])
693 goto found;
694 }
695 for (index = 0; index < MAX_HWIFS; ++index) {
696 hwif = &ide_hwifs[index];
697 if (hwif->hold)
698 continue;
699 if ((!hwif->present && !hwif->mate && !initializing) ||
700 (!hwif->hw.io_ports[IDE_DATA_OFFSET] && initializing))
701 goto found;
702 }
703 for (index = 0; index < MAX_HWIFS; index++)
704 ide_unregister(index);
705 } while (retry--);
706 return -1;
707 found:
708 if (hwif->present)
709 ide_unregister(index);
710 else if (!hwif->hold) {
711 init_hwif_data(hwif, index);
712 init_hwif_default(hwif, index);
713 }
714 if (hwif->present)
715 return -1;
716 memcpy(&hwif->hw, hw, sizeof(*hw));
717 memcpy(hwif->io_ports, hwif->hw.io_ports, sizeof(hwif->hw.io_ports));
718 hwif->irq = hw->irq;
719 hwif->noprobe = 0;
720 hwif->chipset = hw->chipset;
721 hwif->gendev.parent = hw->dev;
722
723 if (!initializing) {
724 probe_hwif_init_with_fixup(hwif, fixup);
725 ide_proc_register_port(hwif);
726 }
727
728 if (hwifp)
729 *hwifp = hwif;
730
731 return (initializing || hwif->present) ? index : -1;
732 }
733
734 EXPORT_SYMBOL(ide_register_hw_with_fixup);
735
736 int ide_register_hw(hw_regs_t *hw, int initializing, ide_hwif_t **hwifp)
737 {
738 return ide_register_hw_with_fixup(hw, initializing, hwifp, NULL);
739 }
740
741 EXPORT_SYMBOL(ide_register_hw);
742
743 /*
744 * Locks for IDE setting functionality
745 */
746
747 DEFINE_MUTEX(ide_setting_mtx);
748
749 EXPORT_SYMBOL_GPL(ide_setting_mtx);
750
751 /**
752 * ide_spin_wait_hwgroup - wait for group
753 * @drive: drive in the group
754 *
755 * Wait for an IDE device group to go non busy and then return
756 * holding the ide_lock which guards the hwgroup->busy status
757 * and right to use it.
758 */
759
760 int ide_spin_wait_hwgroup (ide_drive_t *drive)
761 {
762 ide_hwgroup_t *hwgroup = HWGROUP(drive);
763 unsigned long timeout = jiffies + (3 * HZ);
764
765 spin_lock_irq(&ide_lock);
766
767 while (hwgroup->busy) {
768 unsigned long lflags;
769 spin_unlock_irq(&ide_lock);
770 local_irq_set(lflags);
771 if (time_after(jiffies, timeout)) {
772 local_irq_restore(lflags);
773 printk(KERN_ERR "%s: channel busy\n", drive->name);
774 return -EBUSY;
775 }
776 local_irq_restore(lflags);
777 spin_lock_irq(&ide_lock);
778 }
779 return 0;
780 }
781
782 EXPORT_SYMBOL(ide_spin_wait_hwgroup);
783
784 int set_io_32bit(ide_drive_t *drive, int arg)
785 {
786 if (drive->no_io_32bit)
787 return -EPERM;
788
789 if (arg < 0 || arg > 1 + (SUPPORT_VLB_SYNC << 1))
790 return -EINVAL;
791
792 drive->io_32bit = arg;
793 #ifdef CONFIG_BLK_DEV_DTC2278
794 if (HWIF(drive)->chipset == ide_dtc2278)
795 HWIF(drive)->drives[!drive->select.b.unit].io_32bit = arg;
796 #endif /* CONFIG_BLK_DEV_DTC2278 */
797 return 0;
798 }
799
800 static int set_ksettings(ide_drive_t *drive, int arg)
801 {
802 if (arg < 0 || arg > 1)
803 return -EINVAL;
804
805 if (ide_spin_wait_hwgroup(drive))
806 return -EBUSY;
807 drive->keep_settings = arg;
808 spin_unlock_irq(&ide_lock);
809
810 return 0;
811 }
812
813 int set_using_dma(ide_drive_t *drive, int arg)
814 {
815 #ifdef CONFIG_BLK_DEV_IDEDMA
816 ide_hwif_t *hwif = drive->hwif;
817 int err = -EPERM;
818
819 if (arg < 0 || arg > 1)
820 return -EINVAL;
821
822 if (!drive->id || !(drive->id->capability & 1))
823 goto out;
824
825 if (hwif->ide_dma_on == NULL)
826 goto out;
827
828 err = -EBUSY;
829 if (ide_spin_wait_hwgroup(drive))
830 goto out;
831 /*
832 * set ->busy flag, unlock and let it ride
833 */
834 hwif->hwgroup->busy = 1;
835 spin_unlock_irq(&ide_lock);
836
837 err = 0;
838
839 if (arg) {
840 hwif->dma_off_quietly(drive);
841 if (ide_set_dma(drive) || hwif->ide_dma_on(drive))
842 err = -EIO;
843 } else
844 ide_dma_off(drive);
845
846 /*
847 * lock, clear ->busy flag and unlock before leaving
848 */
849 spin_lock_irq(&ide_lock);
850 hwif->hwgroup->busy = 0;
851 spin_unlock_irq(&ide_lock);
852 out:
853 return err;
854 #else
855 if (arg < 0 || arg > 1)
856 return -EINVAL;
857
858 return -EPERM;
859 #endif
860 }
861
862 int set_pio_mode(ide_drive_t *drive, int arg)
863 {
864 struct request rq;
865
866 if (arg < 0 || arg > 255)
867 return -EINVAL;
868
869 if (drive->hwif->set_pio_mode == NULL)
870 return -ENOSYS;
871
872 if (drive->special.b.set_tune)
873 return -EBUSY;
874 ide_init_drive_cmd(&rq);
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((int) ((!system_bus_speed) ? ide_system_bus_speed() : 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, 0, 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 #ifdef CONFIG_BLK_DEV_ALI14XX
1218 extern int probe_ali14xx;
1219 extern int ali14xx_init(void);
1220 #endif
1221 #ifdef CONFIG_BLK_DEV_UMC8672
1222 extern int probe_umc8672;
1223 extern int umc8672_init(void);
1224 #endif
1225 #ifdef CONFIG_BLK_DEV_DTC2278
1226 extern int probe_dtc2278;
1227 extern int dtc2278_init(void);
1228 #endif
1229 #ifdef CONFIG_BLK_DEV_HT6560B
1230 extern int probe_ht6560b;
1231 extern int ht6560b_init(void);
1232 #endif
1233 #ifdef CONFIG_BLK_DEV_QD65XX
1234 extern int probe_qd65xx;
1235 extern int qd65xx_init(void);
1236 #endif
1237
1238 static int __initdata is_chipset_set[MAX_HWIFS];
1239
1240 /*
1241 * ide_setup() gets called VERY EARLY during initialization,
1242 * to handle kernel "command line" strings beginning with "hdx=" or "ide".
1243 *
1244 * Remember to update Documentation/ide.txt if you change something here.
1245 */
1246 static int __init ide_setup(char *s)
1247 {
1248 int i, vals[3];
1249 ide_hwif_t *hwif;
1250 ide_drive_t *drive;
1251 unsigned int hw, unit;
1252 const char max_drive = 'a' + ((MAX_HWIFS * MAX_DRIVES) - 1);
1253 const char max_hwif = '0' + (MAX_HWIFS - 1);
1254
1255
1256 if (strncmp(s,"hd",2) == 0 && s[2] == '=') /* hd= is for hd.c */
1257 return 0; /* driver and not us */
1258
1259 if (strncmp(s,"ide",3) && strncmp(s,"idebus",6) && strncmp(s,"hd",2))
1260 return 0;
1261
1262 printk(KERN_INFO "ide_setup: %s", s);
1263 init_ide_data ();
1264
1265 #ifdef CONFIG_BLK_DEV_IDEDOUBLER
1266 if (!strcmp(s, "ide=doubler")) {
1267 extern int ide_doubler;
1268
1269 printk(" : Enabled support for IDE doublers\n");
1270 ide_doubler = 1;
1271 return 1;
1272 }
1273 #endif /* CONFIG_BLK_DEV_IDEDOUBLER */
1274
1275 if (!strcmp(s, "ide=nodma")) {
1276 printk(" : Prevented DMA\n");
1277 noautodma = 1;
1278 return 1;
1279 }
1280
1281 #ifdef CONFIG_IDEPCI_PCIBUS_ORDER
1282 if (!strcmp(s, "ide=reverse")) {
1283 ide_scan_direction = 1;
1284 printk(" : Enabled support for IDE inverse scan order.\n");
1285 return 1;
1286 }
1287 #endif
1288
1289 #ifdef CONFIG_BLK_DEV_IDEACPI
1290 if (!strcmp(s, "ide=noacpi")) {
1291 //printk(" : Disable IDE ACPI support.\n");
1292 ide_noacpi = 1;
1293 return 1;
1294 }
1295 if (!strcmp(s, "ide=acpigtf")) {
1296 //printk(" : Enable IDE ACPI _GTF support.\n");
1297 ide_noacpitfs = 0;
1298 return 1;
1299 }
1300 if (!strcmp(s, "ide=acpionboot")) {
1301 //printk(" : Call IDE ACPI methods on boot.\n");
1302 ide_noacpionboot = 0;
1303 return 1;
1304 }
1305 #endif /* CONFIG_BLK_DEV_IDEACPI */
1306
1307 /*
1308 * Look for drive options: "hdx="
1309 */
1310 if (s[0] == 'h' && s[1] == 'd' && s[2] >= 'a' && s[2] <= max_drive) {
1311 const char *hd_words[] = {
1312 "none", "noprobe", "nowerr", "cdrom", "minus5",
1313 "autotune", "noautotune", "minus8", "swapdata", "bswap",
1314 "noflush", "remap", "remap63", "scsi", NULL };
1315 unit = s[2] - 'a';
1316 hw = unit / MAX_DRIVES;
1317 unit = unit % MAX_DRIVES;
1318 hwif = &ide_hwifs[hw];
1319 drive = &hwif->drives[unit];
1320 if (strncmp(s + 4, "ide-", 4) == 0) {
1321 strlcpy(drive->driver_req, s + 4, sizeof(drive->driver_req));
1322 goto done;
1323 }
1324 switch (match_parm(&s[3], hd_words, vals, 3)) {
1325 case -1: /* "none" */
1326 case -2: /* "noprobe" */
1327 drive->noprobe = 1;
1328 goto done;
1329 case -3: /* "nowerr" */
1330 drive->bad_wstat = BAD_R_STAT;
1331 hwif->noprobe = 0;
1332 goto done;
1333 case -4: /* "cdrom" */
1334 drive->present = 1;
1335 drive->media = ide_cdrom;
1336 /* an ATAPI device ignores DRDY */
1337 drive->ready_stat = 0;
1338 hwif->noprobe = 0;
1339 goto done;
1340 case -6: /* "autotune" */
1341 drive->autotune = IDE_TUNE_AUTO;
1342 goto obsolete_option;
1343 case -7: /* "noautotune" */
1344 drive->autotune = IDE_TUNE_NOAUTO;
1345 goto obsolete_option;
1346 case -9: /* "swapdata" */
1347 case -10: /* "bswap" */
1348 drive->bswap = 1;
1349 goto done;
1350 case -11: /* noflush */
1351 drive->noflush = 1;
1352 goto done;
1353 case -12: /* "remap" */
1354 drive->remap_0_to_1 = 1;
1355 goto done;
1356 case -13: /* "remap63" */
1357 drive->sect0 = 63;
1358 goto done;
1359 case -14: /* "scsi" */
1360 drive->scsi = 1;
1361 goto done;
1362 case 3: /* cyl,head,sect */
1363 drive->media = ide_disk;
1364 drive->ready_stat = READY_STAT;
1365 drive->cyl = drive->bios_cyl = vals[0];
1366 drive->head = drive->bios_head = vals[1];
1367 drive->sect = drive->bios_sect = vals[2];
1368 drive->present = 1;
1369 drive->forced_geom = 1;
1370 hwif->noprobe = 0;
1371 goto done;
1372 default:
1373 goto bad_option;
1374 }
1375 }
1376
1377 if (s[0] != 'i' || s[1] != 'd' || s[2] != 'e')
1378 goto bad_option;
1379 /*
1380 * Look for bus speed option: "idebus="
1381 */
1382 if (s[3] == 'b' && s[4] == 'u' && s[5] == 's') {
1383 if (match_parm(&s[6], NULL, vals, 1) != 1)
1384 goto bad_option;
1385 if (vals[0] >= 20 && vals[0] <= 66) {
1386 idebus_parameter = vals[0];
1387 } else
1388 printk(" -- BAD BUS SPEED! Expected value from 20 to 66");
1389 goto done;
1390 }
1391 /*
1392 * Look for interface options: "idex="
1393 */
1394 if (s[3] >= '0' && s[3] <= max_hwif) {
1395 /*
1396 * Be VERY CAREFUL changing this: note hardcoded indexes below
1397 * (-8, -9, -10) are reserved to ease the hardcoding.
1398 */
1399 static const char *ide_words[] = {
1400 "noprobe", "serialize", "minus3", "minus4",
1401 "reset", "dma", "ata66", "minus8", "minus9",
1402 "minus10", "four", "qd65xx", "ht6560b", "cmd640_vlb",
1403 "dtc2278", "umc8672", "ali14xx", NULL };
1404 hw = s[3] - '0';
1405 hwif = &ide_hwifs[hw];
1406 i = match_parm(&s[4], ide_words, vals, 3);
1407
1408 /*
1409 * Cryptic check to ensure chipset not already set for hwif.
1410 * Note: we can't depend on hwif->chipset here.
1411 */
1412 if ((i >= -18 && i <= -11) || (i > 0 && i <= 3)) {
1413 /* chipset already specified */
1414 if (is_chipset_set[hw])
1415 goto bad_option;
1416 if (i > -18 && i <= -11) {
1417 /* these drivers are for "ide0=" only */
1418 if (hw != 0)
1419 goto bad_hwif;
1420 /* chipset already specified for 2nd port */
1421 if (is_chipset_set[hw+1])
1422 goto bad_option;
1423 }
1424 is_chipset_set[hw] = 1;
1425 printk("\n");
1426 }
1427
1428 switch (i) {
1429 #ifdef CONFIG_BLK_DEV_ALI14XX
1430 case -17: /* "ali14xx" */
1431 probe_ali14xx = 1;
1432 goto done;
1433 #endif
1434 #ifdef CONFIG_BLK_DEV_UMC8672
1435 case -16: /* "umc8672" */
1436 probe_umc8672 = 1;
1437 goto done;
1438 #endif
1439 #ifdef CONFIG_BLK_DEV_DTC2278
1440 case -15: /* "dtc2278" */
1441 probe_dtc2278 = 1;
1442 goto done;
1443 #endif
1444 #ifdef CONFIG_BLK_DEV_CMD640
1445 case -14: /* "cmd640_vlb" */
1446 {
1447 extern int cmd640_vlb; /* flag for cmd640.c */
1448 cmd640_vlb = 1;
1449 goto done;
1450 }
1451 #endif
1452 #ifdef CONFIG_BLK_DEV_HT6560B
1453 case -13: /* "ht6560b" */
1454 probe_ht6560b = 1;
1455 goto done;
1456 #endif
1457 #ifdef CONFIG_BLK_DEV_QD65XX
1458 case -12: /* "qd65xx" */
1459 probe_qd65xx = 1;
1460 goto done;
1461 #endif
1462 #ifdef CONFIG_BLK_DEV_4DRIVES
1463 case -11: /* "four" drives on one set of ports */
1464 {
1465 ide_hwif_t *mate = &ide_hwifs[hw^1];
1466 mate->drives[0].select.all ^= 0x20;
1467 mate->drives[1].select.all ^= 0x20;
1468 hwif->chipset = mate->chipset = ide_4drives;
1469 mate->irq = hwif->irq;
1470 memcpy(mate->io_ports, hwif->io_ports, sizeof(hwif->io_ports));
1471 hwif->mate = mate;
1472 mate->mate = hwif;
1473 hwif->serialized = mate->serialized = 1;
1474 goto obsolete_option;
1475 }
1476 #endif /* CONFIG_BLK_DEV_4DRIVES */
1477 case -10: /* minus10 */
1478 case -9: /* minus9 */
1479 case -8: /* minus8 */
1480 case -4:
1481 case -3:
1482 goto bad_option;
1483 case -7: /* ata66 */
1484 #ifdef CONFIG_BLK_DEV_IDEPCI
1485 /*
1486 * Use ATA_CBL_PATA40_SHORT so drive side
1487 * cable detection is also overriden.
1488 */
1489 hwif->cbl = ATA_CBL_PATA40_SHORT;
1490 goto obsolete_option;
1491 #else
1492 goto bad_hwif;
1493 #endif
1494 case -6: /* dma */
1495 hwif->autodma = 1;
1496 goto obsolete_option;
1497 case -5: /* "reset" */
1498 hwif->reset = 1;
1499 goto obsolete_option;
1500 case -2: /* "serialize" */
1501 hwif->mate = &ide_hwifs[hw^1];
1502 hwif->mate->mate = hwif;
1503 hwif->serialized = hwif->mate->serialized = 1;
1504 goto obsolete_option;
1505
1506 case -1: /* "noprobe" */
1507 hwif->noprobe = 1;
1508 goto done;
1509
1510 case 1: /* base */
1511 vals[1] = vals[0] + 0x206; /* default ctl */
1512 case 2: /* base,ctl */
1513 vals[2] = 0; /* default irq = probe for it */
1514 case 3: /* base,ctl,irq */
1515 hwif->hw.irq = vals[2];
1516 ide_init_hwif_ports(&hwif->hw, (unsigned long) vals[0], (unsigned long) vals[1], &hwif->irq);
1517 memcpy(hwif->io_ports, hwif->hw.io_ports, sizeof(hwif->io_ports));
1518 hwif->irq = vals[2];
1519 hwif->noprobe = 0;
1520 hwif->chipset = ide_forced;
1521 goto obsolete_option;
1522
1523 case 0: goto bad_option;
1524 default:
1525 printk(" -- SUPPORT NOT CONFIGURED IN THIS KERNEL\n");
1526 return 1;
1527 }
1528 }
1529 bad_option:
1530 printk(" -- BAD OPTION\n");
1531 return 1;
1532 obsolete_option:
1533 printk(" -- OBSOLETE OPTION, WILL BE REMOVED SOON!\n");
1534 return 1;
1535 bad_hwif:
1536 printk("-- NOT SUPPORTED ON ide%d", hw);
1537 done:
1538 printk("\n");
1539 return 1;
1540 }
1541
1542 extern void __init pnpide_init(void);
1543 extern void __exit pnpide_exit(void);
1544 extern void __init h8300_ide_init(void);
1545
1546 /*
1547 * probe_for_hwifs() finds/initializes "known" IDE interfaces
1548 */
1549 static void __init probe_for_hwifs (void)
1550 {
1551 #ifdef CONFIG_IDEPCI_PCIBUS_ORDER
1552 ide_scan_pcibus(ide_scan_direction);
1553 #endif
1554
1555 #ifdef CONFIG_ETRAX_IDE
1556 {
1557 extern void init_e100_ide(void);
1558 init_e100_ide();
1559 }
1560 #endif /* CONFIG_ETRAX_IDE */
1561 #ifdef CONFIG_BLK_DEV_CMD640
1562 {
1563 extern void ide_probe_for_cmd640x(void);
1564 ide_probe_for_cmd640x();
1565 }
1566 #endif /* CONFIG_BLK_DEV_CMD640 */
1567 #ifdef CONFIG_BLK_DEV_IDE_PMAC
1568 {
1569 extern int pmac_ide_probe(void);
1570 (void)pmac_ide_probe();
1571 }
1572 #endif /* CONFIG_BLK_DEV_IDE_PMAC */
1573 #ifdef CONFIG_BLK_DEV_GAYLE
1574 {
1575 extern void gayle_init(void);
1576 gayle_init();
1577 }
1578 #endif /* CONFIG_BLK_DEV_GAYLE */
1579 #ifdef CONFIG_BLK_DEV_FALCON_IDE
1580 {
1581 extern void falconide_init(void);
1582 falconide_init();
1583 }
1584 #endif /* CONFIG_BLK_DEV_FALCON_IDE */
1585 #ifdef CONFIG_BLK_DEV_MAC_IDE
1586 {
1587 extern void macide_init(void);
1588 macide_init();
1589 }
1590 #endif /* CONFIG_BLK_DEV_MAC_IDE */
1591 #ifdef CONFIG_BLK_DEV_Q40IDE
1592 {
1593 extern void q40ide_init(void);
1594 q40ide_init();
1595 }
1596 #endif /* CONFIG_BLK_DEV_Q40IDE */
1597 #ifdef CONFIG_BLK_DEV_BUDDHA
1598 {
1599 extern void buddha_init(void);
1600 buddha_init();
1601 }
1602 #endif /* CONFIG_BLK_DEV_BUDDHA */
1603 #ifdef CONFIG_BLK_DEV_IDEPNP
1604 pnpide_init();
1605 #endif
1606 #ifdef CONFIG_H8300
1607 h8300_ide_init();
1608 #endif
1609 }
1610
1611 /*
1612 * Probe module
1613 */
1614
1615 EXPORT_SYMBOL(ide_lock);
1616
1617 static int ide_bus_match(struct device *dev, struct device_driver *drv)
1618 {
1619 return 1;
1620 }
1621
1622 static char *media_string(ide_drive_t *drive)
1623 {
1624 switch (drive->media) {
1625 case ide_disk:
1626 return "disk";
1627 case ide_cdrom:
1628 return "cdrom";
1629 case ide_tape:
1630 return "tape";
1631 case ide_floppy:
1632 return "floppy";
1633 case ide_optical:
1634 return "optical";
1635 default:
1636 return "UNKNOWN";
1637 }
1638 }
1639
1640 static ssize_t media_show(struct device *dev, struct device_attribute *attr, char *buf)
1641 {
1642 ide_drive_t *drive = to_ide_device(dev);
1643 return sprintf(buf, "%s\n", media_string(drive));
1644 }
1645
1646 static ssize_t drivename_show(struct device *dev, struct device_attribute *attr, char *buf)
1647 {
1648 ide_drive_t *drive = to_ide_device(dev);
1649 return sprintf(buf, "%s\n", drive->name);
1650 }
1651
1652 static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf)
1653 {
1654 ide_drive_t *drive = to_ide_device(dev);
1655 return sprintf(buf, "ide:m-%s\n", media_string(drive));
1656 }
1657
1658 static struct device_attribute ide_dev_attrs[] = {
1659 __ATTR_RO(media),
1660 __ATTR_RO(drivename),
1661 __ATTR_RO(modalias),
1662 __ATTR_NULL
1663 };
1664
1665 static int ide_uevent(struct device *dev, struct kobj_uevent_env *env)
1666 {
1667 ide_drive_t *drive = to_ide_device(dev);
1668
1669 add_uevent_var(env, "MEDIA=%s", media_string(drive));
1670 add_uevent_var(env, "DRIVENAME=%s", drive->name);
1671 add_uevent_var(env, "MODALIAS=ide:m-%s", media_string(drive));
1672 return 0;
1673 }
1674
1675 static int generic_ide_probe(struct device *dev)
1676 {
1677 ide_drive_t *drive = to_ide_device(dev);
1678 ide_driver_t *drv = to_ide_driver(dev->driver);
1679
1680 return drv->probe ? drv->probe(drive) : -ENODEV;
1681 }
1682
1683 static int generic_ide_remove(struct device *dev)
1684 {
1685 ide_drive_t *drive = to_ide_device(dev);
1686 ide_driver_t *drv = to_ide_driver(dev->driver);
1687
1688 if (drv->remove)
1689 drv->remove(drive);
1690
1691 return 0;
1692 }
1693
1694 static void generic_ide_shutdown(struct device *dev)
1695 {
1696 ide_drive_t *drive = to_ide_device(dev);
1697 ide_driver_t *drv = to_ide_driver(dev->driver);
1698
1699 if (dev->driver && drv->shutdown)
1700 drv->shutdown(drive);
1701 }
1702
1703 struct bus_type ide_bus_type = {
1704 .name = "ide",
1705 .match = ide_bus_match,
1706 .uevent = ide_uevent,
1707 .probe = generic_ide_probe,
1708 .remove = generic_ide_remove,
1709 .shutdown = generic_ide_shutdown,
1710 .dev_attrs = ide_dev_attrs,
1711 .suspend = generic_ide_suspend,
1712 .resume = generic_ide_resume,
1713 };
1714
1715 EXPORT_SYMBOL_GPL(ide_bus_type);
1716
1717 /*
1718 * This is gets invoked once during initialization, to set *everything* up
1719 */
1720 static int __init ide_init(void)
1721 {
1722 int ret;
1723
1724 printk(KERN_INFO "Uniform Multi-Platform E-IDE driver " REVISION "\n");
1725 system_bus_speed = ide_system_bus_speed();
1726
1727 ret = bus_register(&ide_bus_type);
1728 if (ret < 0) {
1729 printk(KERN_WARNING "IDE: bus_register error: %d\n", ret);
1730 return ret;
1731 }
1732
1733 init_ide_data();
1734
1735 proc_ide_create();
1736
1737 #ifdef CONFIG_BLK_DEV_ALI14XX
1738 if (probe_ali14xx)
1739 (void)ali14xx_init();
1740 #endif
1741 #ifdef CONFIG_BLK_DEV_UMC8672
1742 if (probe_umc8672)
1743 (void)umc8672_init();
1744 #endif
1745 #ifdef CONFIG_BLK_DEV_DTC2278
1746 if (probe_dtc2278)
1747 (void)dtc2278_init();
1748 #endif
1749 #ifdef CONFIG_BLK_DEV_HT6560B
1750 if (probe_ht6560b)
1751 (void)ht6560b_init();
1752 #endif
1753 #ifdef CONFIG_BLK_DEV_QD65XX
1754 if (probe_qd65xx)
1755 (void)qd65xx_init();
1756 #endif
1757
1758 /* Probe for special PCI and other "known" interface chipsets. */
1759 probe_for_hwifs();
1760
1761 return 0;
1762 }
1763
1764 #ifdef MODULE
1765 static char *options = NULL;
1766 module_param(options, charp, 0);
1767 MODULE_LICENSE("GPL");
1768
1769 static void __init parse_options (char *line)
1770 {
1771 char *next = line;
1772
1773 if (line == NULL || !*line)
1774 return;
1775 while ((line = next) != NULL) {
1776 if ((next = strchr(line,' ')) != NULL)
1777 *next++ = 0;
1778 if (!ide_setup(line))
1779 printk (KERN_INFO "Unknown option '%s'\n", line);
1780 }
1781 }
1782
1783 int __init init_module (void)
1784 {
1785 parse_options(options);
1786 return ide_init();
1787 }
1788
1789 void __exit cleanup_module (void)
1790 {
1791 int index;
1792
1793 for (index = 0; index < MAX_HWIFS; ++index)
1794 ide_unregister(index);
1795
1796 #ifdef CONFIG_BLK_DEV_IDEPNP
1797 pnpide_exit();
1798 #endif
1799
1800 proc_ide_destroy();
1801
1802 bus_unregister(&ide_bus_type);
1803 }
1804
1805 #else /* !MODULE */
1806
1807 __setup("", ide_setup);
1808
1809 module_init(ide_init);
1810
1811 #endif /* MODULE */
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