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1 /*
2 * linux/drivers/ide/ide.c Version 7.00beta2 Mar 05 2003
3 *
4 * Copyright (C) 1994-1998 Linus Torvalds & authors (see below)
5 */
6
7 /*
8 * Mostly written by Mark Lord <mlord@pobox.com>
9 * and Gadi Oxman <gadio@netvision.net.il>
10 * and Andre Hedrick <andre@linux-ide.org>
11 *
12 * See linux/MAINTAINERS for address of current maintainer.
13 *
14 * This is the multiple IDE interface driver, as evolved from hd.c.
15 * It supports up to MAX_HWIFS IDE interfaces, on one or more IRQs
16 * (usually 14 & 15).
17 * There can be up to two drives per interface, as per the ATA-2 spec.
18 *
19 * ...
20 *
21 * From hd.c:
22 * |
23 * | It traverses the request-list, using interrupts to jump between functions.
24 * | As nearly all functions can be called within interrupts, we may not sleep.
25 * | Special care is recommended. Have Fun!
26 * |
27 * | modified by Drew Eckhardt to check nr of hd's from the CMOS.
28 * |
29 * | Thanks to Branko Lankester, lankeste@fwi.uva.nl, who found a bug
30 * | in the early extended-partition checks and added DM partitions.
31 * |
32 * | Early work on error handling by Mika Liljeberg (liljeber@cs.Helsinki.FI).
33 * |
34 * | IRQ-unmask, drive-id, multiple-mode, support for ">16 heads",
35 * | and general streamlining by Mark Lord (mlord@pobox.com).
36 *
37 * October, 1994 -- Complete line-by-line overhaul for linux 1.1.x, by:
38 *
39 * Mark Lord (mlord@pobox.com) (IDE Perf.Pkg)
40 * Delman Lee (delman@ieee.org) ("Mr. atdisk2")
41 * Scott Snyder (snyder@fnald0.fnal.gov) (ATAPI IDE cd-rom)
42 *
43 * This was a rewrite of just about everything from hd.c, though some original
44 * code is still sprinkled about. Think of it as a major evolution, with
45 * inspiration from lots of linux users, esp. hamish@zot.apana.org.au
46 */
47
48 #define REVISION "Revision: 7.00alpha2"
49 #define VERSION "Id: ide.c 7.00a2 20020906"
50
51 #define _IDE_C /* Tell ide.h it's really us */
52
53 #include <linux/module.h>
54 #include <linux/types.h>
55 #include <linux/string.h>
56 #include <linux/kernel.h>
57 #include <linux/timer.h>
58 #include <linux/mm.h>
59 #include <linux/interrupt.h>
60 #include <linux/major.h>
61 #include <linux/errno.h>
62 #include <linux/genhd.h>
63 #include <linux/blkpg.h>
64 #include <linux/slab.h>
65 #include <linux/init.h>
66 #include <linux/pci.h>
67 #include <linux/delay.h>
68 #include <linux/ide.h>
69 #include <linux/completion.h>
70 #include <linux/reboot.h>
71 #include <linux/cdrom.h>
72 #include <linux/seq_file.h>
73 #include <linux/device.h>
74 #include <linux/bitops.h>
75
76 #include <asm/byteorder.h>
77 #include <asm/irq.h>
78 #include <asm/uaccess.h>
79 #include <asm/io.h>
80
81
82 /* default maximum number of failures */
83 #define IDE_DEFAULT_MAX_FAILURES 1
84
85 static const u8 ide_hwif_to_major[] = { IDE0_MAJOR, IDE1_MAJOR,
86 IDE2_MAJOR, IDE3_MAJOR,
87 IDE4_MAJOR, IDE5_MAJOR,
88 IDE6_MAJOR, IDE7_MAJOR,
89 IDE8_MAJOR, IDE9_MAJOR };
90
91 static int idebus_parameter; /* holds the "idebus=" parameter */
92 static int system_bus_speed; /* holds what we think is VESA/PCI bus speed */
93
94 DEFINE_MUTEX(ide_cfg_mtx);
95 __cacheline_aligned_in_smp DEFINE_SPINLOCK(ide_lock);
96
97 #ifdef CONFIG_IDEPCI_PCIBUS_ORDER
98 static int ide_scan_direction; /* THIS was formerly 2.2.x pci=reverse */
99 #endif
100
101 int noautodma = 0;
102
103 #ifdef CONFIG_BLK_DEV_IDEACPI
104 int ide_noacpi = 0;
105 int ide_noacpitfs = 1;
106 int ide_noacpionboot = 1;
107 #endif
108
109 /*
110 * This is declared extern in ide.h, for access by other IDE modules:
111 */
112 ide_hwif_t ide_hwifs[MAX_HWIFS]; /* master data repository */
113
114 EXPORT_SYMBOL(ide_hwifs);
115
116 /*
117 * Do not even *think* about calling this!
118 */
119 static void init_hwif_data(ide_hwif_t *hwif, unsigned int index)
120 {
121 unsigned int unit;
122
123 /* bulk initialize hwif & drive info with zeros */
124 memset(hwif, 0, sizeof(ide_hwif_t));
125
126 /* fill in any non-zero initial values */
127 hwif->index = index;
128 hwif->major = ide_hwif_to_major[index];
129
130 hwif->name[0] = 'i';
131 hwif->name[1] = 'd';
132 hwif->name[2] = 'e';
133 hwif->name[3] = '0' + index;
134
135 hwif->bus_state = BUSSTATE_ON;
136
137 init_completion(&hwif->gendev_rel_comp);
138
139 default_hwif_iops(hwif);
140 default_hwif_transport(hwif);
141 for (unit = 0; unit < MAX_DRIVES; ++unit) {
142 ide_drive_t *drive = &hwif->drives[unit];
143
144 drive->media = ide_disk;
145 drive->select.all = (unit<<4)|0xa0;
146 drive->hwif = hwif;
147 drive->ctl = 0x08;
148 drive->ready_stat = READY_STAT;
149 drive->bad_wstat = BAD_W_STAT;
150 drive->special.b.recalibrate = 1;
151 drive->special.b.set_geometry = 1;
152 drive->name[0] = 'h';
153 drive->name[1] = 'd';
154 drive->name[2] = 'a' + (index * MAX_DRIVES) + unit;
155 drive->max_failures = IDE_DEFAULT_MAX_FAILURES;
156 drive->using_dma = 0;
157 drive->vdma = 0;
158 INIT_LIST_HEAD(&drive->list);
159 init_completion(&drive->gendev_rel_comp);
160 }
161 }
162
163 static void init_hwif_default(ide_hwif_t *hwif, unsigned int index)
164 {
165 hw_regs_t hw;
166
167 memset(&hw, 0, sizeof(hw_regs_t));
168
169 ide_init_hwif_ports(&hw, ide_default_io_base(index), 0, &hwif->irq);
170
171 memcpy(hwif->io_ports, hw.io_ports, sizeof(hw.io_ports));
172
173 hwif->noprobe = !hwif->io_ports[IDE_DATA_OFFSET];
174 #ifdef CONFIG_BLK_DEV_HD
175 if (hwif->io_ports[IDE_DATA_OFFSET] == HD_DATA)
176 hwif->noprobe = 1; /* may be overridden by ide_setup() */
177 #endif
178 }
179
180 extern void ide_arm_init(void);
181
182 /*
183 * init_ide_data() sets reasonable default values into all fields
184 * of all instances of the hwifs and drives, but only on the first call.
185 * Subsequent calls have no effect (they don't wipe out anything).
186 *
187 * This routine is normally called at driver initialization time,
188 * but may also be called MUCH earlier during kernel "command-line"
189 * parameter processing. As such, we cannot depend on any other parts
190 * of the kernel (such as memory allocation) to be functioning yet.
191 *
192 * This is too bad, as otherwise we could dynamically allocate the
193 * ide_drive_t structs as needed, rather than always consuming memory
194 * for the max possible number (MAX_HWIFS * MAX_DRIVES) of them.
195 *
196 * FIXME: We should stuff the setup data into __init and copy the
197 * relevant hwifs/allocate them properly during boot.
198 */
199 #define MAGIC_COOKIE 0x12345678
200 static void __init init_ide_data (void)
201 {
202 ide_hwif_t *hwif;
203 unsigned int index;
204 static unsigned long magic_cookie = MAGIC_COOKIE;
205
206 if (magic_cookie != MAGIC_COOKIE)
207 return; /* already initialized */
208 magic_cookie = 0;
209
210 /* Initialise all interface structures */
211 for (index = 0; index < MAX_HWIFS; ++index) {
212 hwif = &ide_hwifs[index];
213 init_hwif_data(hwif, index);
214 init_hwif_default(hwif, index);
215 #if !defined(CONFIG_PPC32) || !defined(CONFIG_PCI)
216 hwif->irq =
217 ide_init_default_irq(hwif->io_ports[IDE_DATA_OFFSET]);
218 #endif
219 }
220 #ifdef CONFIG_IDE_ARM
221 ide_arm_init();
222 #endif
223 }
224
225 /**
226 * ide_system_bus_speed - guess bus speed
227 *
228 * ide_system_bus_speed() returns what we think is the system VESA/PCI
229 * bus speed (in MHz). This is used for calculating interface PIO timings.
230 * The default is 40 for known PCI systems, 50 otherwise.
231 * The "idebus=xx" parameter can be used to override this value.
232 * The actual value to be used is computed/displayed the first time
233 * through. Drivers should only use this as a last resort.
234 *
235 * Returns a guessed speed in MHz.
236 */
237
238 static int ide_system_bus_speed(void)
239 {
240 #ifdef CONFIG_PCI
241 static struct pci_device_id pci_default[] = {
242 { PCI_DEVICE(PCI_ANY_ID, PCI_ANY_ID) },
243 { }
244 };
245 #else
246 #define pci_default 0
247 #endif /* CONFIG_PCI */
248
249 if (!system_bus_speed) {
250 if (idebus_parameter) {
251 /* user supplied value */
252 system_bus_speed = idebus_parameter;
253 } else if (pci_dev_present(pci_default)) {
254 /* safe default value for PCI */
255 system_bus_speed = 33;
256 } else {
257 /* safe default value for VESA and PCI */
258 system_bus_speed = 50;
259 }
260 printk(KERN_INFO "ide: Assuming %dMHz system bus speed "
261 "for PIO modes%s\n", system_bus_speed,
262 idebus_parameter ? "" : "; override with idebus=xx");
263 }
264 return system_bus_speed;
265 }
266
267 ide_hwif_t * ide_find_port(unsigned long base)
268 {
269 ide_hwif_t *hwif;
270 int i;
271
272 for (i = 0; i < MAX_HWIFS; i++) {
273 hwif = &ide_hwifs[i];
274 if (hwif->io_ports[IDE_DATA_OFFSET] == base)
275 goto found;
276 }
277
278 for (i = 0; i < MAX_HWIFS; i++) {
279 hwif = &ide_hwifs[i];
280 if (hwif->io_ports[IDE_DATA_OFFSET] == 0)
281 goto found;
282 }
283
284 hwif = NULL;
285 found:
286 return hwif;
287 }
288
289 EXPORT_SYMBOL_GPL(ide_find_port);
290
291 static struct resource* hwif_request_region(ide_hwif_t *hwif,
292 unsigned long addr, int num)
293 {
294 struct resource *res = request_region(addr, num, hwif->name);
295
296 if (!res)
297 printk(KERN_ERR "%s: I/O resource 0x%lX-0x%lX not free.\n",
298 hwif->name, addr, addr+num-1);
299 return res;
300 }
301
302 /**
303 * ide_hwif_request_regions - request resources for IDE
304 * @hwif: interface to use
305 *
306 * Requests all the needed resources for an interface.
307 * Right now core IDE code does this work which is deeply wrong.
308 * MMIO leaves it to the controller driver,
309 * PIO will migrate this way over time.
310 */
311
312 int ide_hwif_request_regions(ide_hwif_t *hwif)
313 {
314 unsigned long addr;
315 unsigned int i;
316
317 if (hwif->mmio)
318 return 0;
319 addr = hwif->io_ports[IDE_CONTROL_OFFSET];
320 if (addr && !hwif_request_region(hwif, addr, 1))
321 goto control_region_busy;
322 hwif->straight8 = 0;
323 addr = hwif->io_ports[IDE_DATA_OFFSET];
324 if ((addr | 7) == hwif->io_ports[IDE_STATUS_OFFSET]) {
325 if (!hwif_request_region(hwif, addr, 8))
326 goto data_region_busy;
327 hwif->straight8 = 1;
328 return 0;
329 }
330 for (i = IDE_DATA_OFFSET; i <= IDE_STATUS_OFFSET; i++) {
331 addr = hwif->io_ports[i];
332 if (!hwif_request_region(hwif, addr, 1)) {
333 while (--i)
334 release_region(addr, 1);
335 goto data_region_busy;
336 }
337 }
338 return 0;
339
340 data_region_busy:
341 addr = hwif->io_ports[IDE_CONTROL_OFFSET];
342 if (addr)
343 release_region(addr, 1);
344 control_region_busy:
345 /* If any errors are return, we drop the hwif interface. */
346 return -EBUSY;
347 }
348
349 /**
350 * ide_hwif_release_regions - free IDE resources
351 *
352 * Note that we only release the standard ports,
353 * and do not even try to handle any extra ports
354 * allocated for weird IDE interface chipsets.
355 *
356 * Note also that we don't yet handle mmio resources here. More
357 * importantly our caller should be doing this so we need to
358 * restructure this as a helper function for drivers.
359 */
360
361 void ide_hwif_release_regions(ide_hwif_t *hwif)
362 {
363 u32 i = 0;
364
365 if (hwif->mmio)
366 return;
367 if (hwif->io_ports[IDE_CONTROL_OFFSET])
368 release_region(hwif->io_ports[IDE_CONTROL_OFFSET], 1);
369 if (hwif->straight8) {
370 release_region(hwif->io_ports[IDE_DATA_OFFSET], 8);
371 return;
372 }
373 for (i = IDE_DATA_OFFSET; i <= IDE_STATUS_OFFSET; i++)
374 if (hwif->io_ports[i])
375 release_region(hwif->io_ports[i], 1);
376 }
377
378 /**
379 * ide_hwif_restore - restore hwif to template
380 * @hwif: hwif to update
381 * @tmp_hwif: template
382 *
383 * Restore hwif to a previous state by copying most settings
384 * from the template.
385 */
386
387 static void ide_hwif_restore(ide_hwif_t *hwif, ide_hwif_t *tmp_hwif)
388 {
389 hwif->hwgroup = tmp_hwif->hwgroup;
390
391 hwif->gendev.parent = tmp_hwif->gendev.parent;
392
393 hwif->proc = tmp_hwif->proc;
394
395 hwif->major = tmp_hwif->major;
396 hwif->straight8 = tmp_hwif->straight8;
397 hwif->bus_state = tmp_hwif->bus_state;
398
399 hwif->host_flags = tmp_hwif->host_flags;
400
401 hwif->pio_mask = tmp_hwif->pio_mask;
402
403 hwif->ultra_mask = tmp_hwif->ultra_mask;
404 hwif->mwdma_mask = tmp_hwif->mwdma_mask;
405 hwif->swdma_mask = tmp_hwif->swdma_mask;
406
407 hwif->cbl = tmp_hwif->cbl;
408
409 hwif->chipset = tmp_hwif->chipset;
410 hwif->hold = tmp_hwif->hold;
411
412 #ifdef CONFIG_BLK_DEV_IDEPCI
413 hwif->pci_dev = tmp_hwif->pci_dev;
414 hwif->cds = tmp_hwif->cds;
415 #endif
416
417 hwif->fixup = tmp_hwif->fixup;
418
419 hwif->set_pio_mode = tmp_hwif->set_pio_mode;
420 hwif->set_dma_mode = tmp_hwif->set_dma_mode;
421 hwif->mdma_filter = tmp_hwif->mdma_filter;
422 hwif->udma_filter = tmp_hwif->udma_filter;
423 hwif->selectproc = tmp_hwif->selectproc;
424 hwif->reset_poll = tmp_hwif->reset_poll;
425 hwif->pre_reset = tmp_hwif->pre_reset;
426 hwif->resetproc = tmp_hwif->resetproc;
427 hwif->maskproc = tmp_hwif->maskproc;
428 hwif->quirkproc = tmp_hwif->quirkproc;
429 hwif->busproc = tmp_hwif->busproc;
430
431 hwif->ata_input_data = tmp_hwif->ata_input_data;
432 hwif->ata_output_data = tmp_hwif->ata_output_data;
433 hwif->atapi_input_bytes = tmp_hwif->atapi_input_bytes;
434 hwif->atapi_output_bytes = tmp_hwif->atapi_output_bytes;
435
436 hwif->dma_setup = tmp_hwif->dma_setup;
437 hwif->dma_exec_cmd = tmp_hwif->dma_exec_cmd;
438 hwif->dma_start = tmp_hwif->dma_start;
439 hwif->ide_dma_end = tmp_hwif->ide_dma_end;
440 hwif->ide_dma_on = tmp_hwif->ide_dma_on;
441 hwif->dma_off_quietly = tmp_hwif->dma_off_quietly;
442 hwif->ide_dma_test_irq = tmp_hwif->ide_dma_test_irq;
443 hwif->ide_dma_clear_irq = tmp_hwif->ide_dma_clear_irq;
444 hwif->dma_host_on = tmp_hwif->dma_host_on;
445 hwif->dma_host_off = tmp_hwif->dma_host_off;
446 hwif->dma_lost_irq = tmp_hwif->dma_lost_irq;
447 hwif->dma_timeout = tmp_hwif->dma_timeout;
448
449 hwif->OUTB = tmp_hwif->OUTB;
450 hwif->OUTBSYNC = tmp_hwif->OUTBSYNC;
451 hwif->OUTW = tmp_hwif->OUTW;
452 hwif->OUTSW = tmp_hwif->OUTSW;
453 hwif->OUTSL = tmp_hwif->OUTSL;
454
455 hwif->INB = tmp_hwif->INB;
456 hwif->INW = tmp_hwif->INW;
457 hwif->INSW = tmp_hwif->INSW;
458 hwif->INSL = tmp_hwif->INSL;
459
460 hwif->sg_max_nents = tmp_hwif->sg_max_nents;
461
462 hwif->mmio = tmp_hwif->mmio;
463 hwif->rqsize = tmp_hwif->rqsize;
464
465 #ifndef CONFIG_BLK_DEV_IDECS
466 hwif->irq = tmp_hwif->irq;
467 #endif
468
469 hwif->dma_base = tmp_hwif->dma_base;
470 hwif->dma_command = tmp_hwif->dma_command;
471 hwif->dma_vendor1 = tmp_hwif->dma_vendor1;
472 hwif->dma_status = tmp_hwif->dma_status;
473 hwif->dma_vendor3 = tmp_hwif->dma_vendor3;
474 hwif->dma_prdtable = tmp_hwif->dma_prdtable;
475
476 hwif->config_data = tmp_hwif->config_data;
477 hwif->select_data = tmp_hwif->select_data;
478 hwif->extra_base = tmp_hwif->extra_base;
479 hwif->extra_ports = tmp_hwif->extra_ports;
480
481 hwif->hwif_data = tmp_hwif->hwif_data;
482 }
483
484 /**
485 * ide_unregister - free an IDE interface
486 * @index: index of interface (will change soon to a pointer)
487 *
488 * Perform the final unregister of an IDE interface. At the moment
489 * we don't refcount interfaces so this will also get split up.
490 *
491 * Locking:
492 * The caller must not hold the IDE locks
493 * The drive present/vanishing is not yet properly locked
494 * Take care with the callbacks. These have been split to avoid
495 * deadlocking the IDE layer. The shutdown callback is called
496 * before we take the lock and free resources. It is up to the
497 * caller to be sure there is no pending I/O here, and that
498 * the interface will not be reopened (present/vanishing locking
499 * isn't yet done BTW). After we commit to the final kill we
500 * call the cleanup callback with the ide locks held.
501 *
502 * Unregister restores the hwif structures to the default state.
503 * This is raving bonkers.
504 */
505
506 void ide_unregister(unsigned int index)
507 {
508 ide_drive_t *drive;
509 ide_hwif_t *hwif, *g;
510 static ide_hwif_t tmp_hwif; /* protected by ide_cfg_mtx */
511 ide_hwgroup_t *hwgroup;
512 int irq_count = 0, unit;
513
514 BUG_ON(index >= MAX_HWIFS);
515
516 BUG_ON(in_interrupt());
517 BUG_ON(irqs_disabled());
518 mutex_lock(&ide_cfg_mtx);
519 spin_lock_irq(&ide_lock);
520 hwif = &ide_hwifs[index];
521 if (!hwif->present)
522 goto abort;
523 for (unit = 0; unit < MAX_DRIVES; ++unit) {
524 drive = &hwif->drives[unit];
525 if (!drive->present)
526 continue;
527 spin_unlock_irq(&ide_lock);
528 device_unregister(&drive->gendev);
529 wait_for_completion(&drive->gendev_rel_comp);
530 spin_lock_irq(&ide_lock);
531 }
532 hwif->present = 0;
533
534 spin_unlock_irq(&ide_lock);
535
536 ide_proc_unregister_port(hwif);
537
538 hwgroup = hwif->hwgroup;
539 /*
540 * free the irq if we were the only hwif using it
541 */
542 g = hwgroup->hwif;
543 do {
544 if (g->irq == hwif->irq)
545 ++irq_count;
546 g = g->next;
547 } while (g != hwgroup->hwif);
548 if (irq_count == 1)
549 free_irq(hwif->irq, hwgroup);
550
551 spin_lock_irq(&ide_lock);
552 /*
553 * Note that we only release the standard ports,
554 * and do not even try to handle any extra ports
555 * allocated for weird IDE interface chipsets.
556 */
557 ide_hwif_release_regions(hwif);
558
559 /*
560 * Remove us from the hwgroup, and free
561 * the hwgroup if we were the only member
562 */
563 if (hwif->next == hwif) {
564 BUG_ON(hwgroup->hwif != hwif);
565 kfree(hwgroup);
566 } else {
567 /* There is another interface in hwgroup.
568 * Unlink us, and set hwgroup->drive and ->hwif to
569 * something sane.
570 */
571 g = hwgroup->hwif;
572 while (g->next != hwif)
573 g = g->next;
574 g->next = hwif->next;
575 if (hwgroup->hwif == hwif) {
576 /* Chose a random hwif for hwgroup->hwif.
577 * It's guaranteed that there are no drives
578 * left in the hwgroup.
579 */
580 BUG_ON(hwgroup->drive != NULL);
581 hwgroup->hwif = g;
582 }
583 BUG_ON(hwgroup->hwif == hwif);
584 }
585
586 /* More messed up locking ... */
587 spin_unlock_irq(&ide_lock);
588 device_unregister(&hwif->gendev);
589 wait_for_completion(&hwif->gendev_rel_comp);
590
591 /*
592 * Remove us from the kernel's knowledge
593 */
594 blk_unregister_region(MKDEV(hwif->major, 0), MAX_DRIVES<<PARTN_BITS);
595 kfree(hwif->sg_table);
596 unregister_blkdev(hwif->major, hwif->name);
597 spin_lock_irq(&ide_lock);
598
599 if (hwif->dma_base) {
600 (void) ide_release_dma(hwif);
601
602 hwif->dma_base = 0;
603 hwif->dma_command = 0;
604 hwif->dma_vendor1 = 0;
605 hwif->dma_status = 0;
606 hwif->dma_vendor3 = 0;
607 hwif->dma_prdtable = 0;
608
609 hwif->extra_base = 0;
610 hwif->extra_ports = 0;
611 }
612
613 /* copy original settings */
614 tmp_hwif = *hwif;
615
616 /* restore hwif data to pristine status */
617 init_hwif_data(hwif, index);
618 init_hwif_default(hwif, index);
619
620 ide_hwif_restore(hwif, &tmp_hwif);
621
622 abort:
623 spin_unlock_irq(&ide_lock);
624 mutex_unlock(&ide_cfg_mtx);
625 }
626
627 EXPORT_SYMBOL(ide_unregister);
628
629
630 /**
631 * ide_setup_ports - set up IDE interface ports
632 * @hw: register descriptions
633 * @base: base register
634 * @offsets: table of register offsets
635 * @ctrl: control register
636 * @ack_irq: IRQ ack
637 * @irq: interrupt lie
638 *
639 * Setup hw_regs_t structure described by parameters. You
640 * may set up the hw structure yourself OR use this routine to
641 * do it for you. This is basically a helper
642 *
643 */
644
645 void ide_setup_ports ( hw_regs_t *hw,
646 unsigned long base, int *offsets,
647 unsigned long ctrl, unsigned long intr,
648 ide_ack_intr_t *ack_intr,
649 /*
650 * ide_io_ops_t *iops,
651 */
652 int irq)
653 {
654 int i;
655
656 memset(hw, 0, sizeof(hw_regs_t));
657 for (i = 0; i < IDE_NR_PORTS; i++) {
658 if (offsets[i] == -1) {
659 switch(i) {
660 case IDE_CONTROL_OFFSET:
661 hw->io_ports[i] = ctrl;
662 break;
663 #if defined(CONFIG_AMIGA) || defined(CONFIG_MAC)
664 case IDE_IRQ_OFFSET:
665 hw->io_ports[i] = intr;
666 break;
667 #endif /* (CONFIG_AMIGA) || (CONFIG_MAC) */
668 default:
669 hw->io_ports[i] = 0;
670 break;
671 }
672 } else {
673 hw->io_ports[i] = base + offsets[i];
674 }
675 }
676 hw->irq = irq;
677 hw->ack_intr = ack_intr;
678 /*
679 * hw->iops = iops;
680 */
681 }
682
683 /**
684 * ide_register_hw - register IDE interface
685 * @hw: hardware registers
686 * @fixup: fixup function
687 * @initializing: set while initializing built-in drivers
688 * @hwifp: pointer to returned hwif
689 *
690 * Register an IDE interface, specifying exactly the registers etc.
691 * Set init=1 iff calling before probes have taken place.
692 *
693 * Returns -1 on error.
694 */
695
696 int ide_register_hw(hw_regs_t *hw, void (*fixup)(ide_hwif_t *),
697 int initializing, ide_hwif_t **hwifp)
698 {
699 int index, retry = 1;
700 ide_hwif_t *hwif;
701
702 do {
703 for (index = 0; index < MAX_HWIFS; ++index) {
704 hwif = &ide_hwifs[index];
705 if (hwif->io_ports[IDE_DATA_OFFSET] == hw->io_ports[IDE_DATA_OFFSET])
706 goto found;
707 }
708 for (index = 0; index < MAX_HWIFS; ++index) {
709 hwif = &ide_hwifs[index];
710 if (hwif->hold)
711 continue;
712 if ((!hwif->present && !hwif->mate && !initializing) ||
713 (!hwif->io_ports[IDE_DATA_OFFSET] && initializing))
714 goto found;
715 }
716 for (index = 0; index < MAX_HWIFS; index++)
717 ide_unregister(index);
718 } while (retry--);
719 return -1;
720 found:
721 if (hwif->present)
722 ide_unregister(index);
723 else if (!hwif->hold) {
724 init_hwif_data(hwif, index);
725 init_hwif_default(hwif, index);
726 }
727 if (hwif->present)
728 return -1;
729 memcpy(hwif->io_ports, hw->io_ports, sizeof(hwif->io_ports));
730 hwif->irq = hw->irq;
731 hwif->noprobe = 0;
732 hwif->fixup = fixup;
733 hwif->chipset = hw->chipset;
734 hwif->gendev.parent = hw->dev;
735 hwif->ack_intr = hw->ack_intr;
736
737 if (initializing == 0) {
738 u8 idx[4] = { index, 0xff, 0xff, 0xff };
739
740 ide_device_add(idx);
741 }
742
743 if (hwifp)
744 *hwifp = hwif;
745
746 return (initializing || hwif->present) ? index : -1;
747 }
748
749 EXPORT_SYMBOL(ide_register_hw);
750
751 /*
752 * Locks for IDE setting functionality
753 */
754
755 DEFINE_MUTEX(ide_setting_mtx);
756
757 EXPORT_SYMBOL_GPL(ide_setting_mtx);
758
759 /**
760 * ide_spin_wait_hwgroup - wait for group
761 * @drive: drive in the group
762 *
763 * Wait for an IDE device group to go non busy and then return
764 * holding the ide_lock which guards the hwgroup->busy status
765 * and right to use it.
766 */
767
768 int ide_spin_wait_hwgroup (ide_drive_t *drive)
769 {
770 ide_hwgroup_t *hwgroup = HWGROUP(drive);
771 unsigned long timeout = jiffies + (3 * HZ);
772
773 spin_lock_irq(&ide_lock);
774
775 while (hwgroup->busy) {
776 unsigned long lflags;
777 spin_unlock_irq(&ide_lock);
778 local_irq_set(lflags);
779 if (time_after(jiffies, timeout)) {
780 local_irq_restore(lflags);
781 printk(KERN_ERR "%s: channel busy\n", drive->name);
782 return -EBUSY;
783 }
784 local_irq_restore(lflags);
785 spin_lock_irq(&ide_lock);
786 }
787 return 0;
788 }
789
790 EXPORT_SYMBOL(ide_spin_wait_hwgroup);
791
792 int set_io_32bit(ide_drive_t *drive, int arg)
793 {
794 if (drive->no_io_32bit)
795 return -EPERM;
796
797 if (arg < 0 || arg > 1 + (SUPPORT_VLB_SYNC << 1))
798 return -EINVAL;
799
800 if (ide_spin_wait_hwgroup(drive))
801 return -EBUSY;
802
803 drive->io_32bit = arg;
804 #ifdef CONFIG_BLK_DEV_DTC2278
805 if (HWIF(drive)->chipset == ide_dtc2278)
806 HWIF(drive)->drives[!drive->select.b.unit].io_32bit = arg;
807 #endif /* CONFIG_BLK_DEV_DTC2278 */
808
809 spin_unlock_irq(&ide_lock);
810
811 return 0;
812 }
813
814 static int set_ksettings(ide_drive_t *drive, int arg)
815 {
816 if (arg < 0 || arg > 1)
817 return -EINVAL;
818
819 if (ide_spin_wait_hwgroup(drive))
820 return -EBUSY;
821 drive->keep_settings = arg;
822 spin_unlock_irq(&ide_lock);
823
824 return 0;
825 }
826
827 int set_using_dma(ide_drive_t *drive, int arg)
828 {
829 #ifdef CONFIG_BLK_DEV_IDEDMA
830 ide_hwif_t *hwif = drive->hwif;
831 int err = -EPERM;
832
833 if (arg < 0 || arg > 1)
834 return -EINVAL;
835
836 if (!drive->id || !(drive->id->capability & 1))
837 goto out;
838
839 if (hwif->ide_dma_on == NULL)
840 goto out;
841
842 err = -EBUSY;
843 if (ide_spin_wait_hwgroup(drive))
844 goto out;
845 /*
846 * set ->busy flag, unlock and let it ride
847 */
848 hwif->hwgroup->busy = 1;
849 spin_unlock_irq(&ide_lock);
850
851 err = 0;
852
853 if (arg) {
854 if (ide_set_dma(drive))
855 err = -EIO;
856 } else
857 ide_dma_off(drive);
858
859 /*
860 * lock, clear ->busy flag and unlock before leaving
861 */
862 spin_lock_irq(&ide_lock);
863 hwif->hwgroup->busy = 0;
864 spin_unlock_irq(&ide_lock);
865 out:
866 return err;
867 #else
868 if (arg < 0 || arg > 1)
869 return -EINVAL;
870
871 return -EPERM;
872 #endif
873 }
874
875 int set_pio_mode(ide_drive_t *drive, int arg)
876 {
877 struct request rq;
878
879 if (arg < 0 || arg > 255)
880 return -EINVAL;
881
882 if (drive->hwif->set_pio_mode == NULL)
883 return -ENOSYS;
884
885 if (drive->special.b.set_tune)
886 return -EBUSY;
887 ide_init_drive_cmd(&rq);
888 drive->tune_req = (u8) arg;
889 drive->special.b.set_tune = 1;
890 (void) ide_do_drive_cmd(drive, &rq, ide_wait);
891 return 0;
892 }
893
894 static int set_unmaskirq(ide_drive_t *drive, int arg)
895 {
896 if (drive->no_unmask)
897 return -EPERM;
898
899 if (arg < 0 || arg > 1)
900 return -EINVAL;
901
902 if (ide_spin_wait_hwgroup(drive))
903 return -EBUSY;
904 drive->unmask = arg;
905 spin_unlock_irq(&ide_lock);
906
907 return 0;
908 }
909
910 /**
911 * system_bus_clock - clock guess
912 *
913 * External version of the bus clock guess used by very old IDE drivers
914 * for things like VLB timings. Should not be used.
915 */
916
917 int system_bus_clock (void)
918 {
919 return((int) ((!system_bus_speed) ? ide_system_bus_speed() : system_bus_speed ));
920 }
921
922 EXPORT_SYMBOL(system_bus_clock);
923
924 static int generic_ide_suspend(struct device *dev, pm_message_t mesg)
925 {
926 ide_drive_t *drive = dev->driver_data;
927 ide_hwif_t *hwif = HWIF(drive);
928 struct request rq;
929 struct request_pm_state rqpm;
930 ide_task_t args;
931 int ret;
932
933 /* Call ACPI _GTM only once */
934 if (!(drive->dn % 2))
935 ide_acpi_get_timing(hwif);
936
937 memset(&rq, 0, sizeof(rq));
938 memset(&rqpm, 0, sizeof(rqpm));
939 memset(&args, 0, sizeof(args));
940 rq.cmd_type = REQ_TYPE_PM_SUSPEND;
941 rq.special = &args;
942 rq.data = &rqpm;
943 rqpm.pm_step = ide_pm_state_start_suspend;
944 if (mesg.event == PM_EVENT_PRETHAW)
945 mesg.event = PM_EVENT_FREEZE;
946 rqpm.pm_state = mesg.event;
947
948 ret = ide_do_drive_cmd(drive, &rq, ide_wait);
949 /* only call ACPI _PS3 after both drivers are suspended */
950 if (!ret && (((drive->dn % 2) && hwif->drives[0].present
951 && hwif->drives[1].present)
952 || !hwif->drives[0].present
953 || !hwif->drives[1].present))
954 ide_acpi_set_state(hwif, 0);
955 return ret;
956 }
957
958 static int generic_ide_resume(struct device *dev)
959 {
960 ide_drive_t *drive = dev->driver_data;
961 ide_hwif_t *hwif = HWIF(drive);
962 struct request rq;
963 struct request_pm_state rqpm;
964 ide_task_t args;
965 int err;
966
967 /* Call ACPI _STM only once */
968 if (!(drive->dn % 2)) {
969 ide_acpi_set_state(hwif, 1);
970 ide_acpi_push_timing(hwif);
971 }
972
973 ide_acpi_exec_tfs(drive);
974
975 memset(&rq, 0, sizeof(rq));
976 memset(&rqpm, 0, sizeof(rqpm));
977 memset(&args, 0, sizeof(args));
978 rq.cmd_type = REQ_TYPE_PM_RESUME;
979 rq.special = &args;
980 rq.data = &rqpm;
981 rqpm.pm_step = ide_pm_state_start_resume;
982 rqpm.pm_state = PM_EVENT_ON;
983
984 err = ide_do_drive_cmd(drive, &rq, ide_head_wait);
985
986 if (err == 0 && dev->driver) {
987 ide_driver_t *drv = to_ide_driver(dev->driver);
988
989 if (drv->resume)
990 drv->resume(drive);
991 }
992
993 return err;
994 }
995
996 int generic_ide_ioctl(ide_drive_t *drive, struct file *file, struct block_device *bdev,
997 unsigned int cmd, unsigned long arg)
998 {
999 unsigned long flags;
1000 ide_driver_t *drv;
1001 void __user *p = (void __user *)arg;
1002 int err = 0, (*setfunc)(ide_drive_t *, int);
1003 u8 *val;
1004
1005 switch (cmd) {
1006 case HDIO_GET_32BIT: val = &drive->io_32bit; goto read_val;
1007 case HDIO_GET_KEEPSETTINGS: val = &drive->keep_settings; goto read_val;
1008 case HDIO_GET_UNMASKINTR: val = &drive->unmask; goto read_val;
1009 case HDIO_GET_DMA: val = &drive->using_dma; goto read_val;
1010 case HDIO_SET_32BIT: setfunc = set_io_32bit; goto set_val;
1011 case HDIO_SET_KEEPSETTINGS: setfunc = set_ksettings; goto set_val;
1012 case HDIO_SET_PIO_MODE: setfunc = set_pio_mode; goto set_val;
1013 case HDIO_SET_UNMASKINTR: setfunc = set_unmaskirq; goto set_val;
1014 case HDIO_SET_DMA: setfunc = set_using_dma; goto set_val;
1015 }
1016
1017 switch (cmd) {
1018 case HDIO_OBSOLETE_IDENTITY:
1019 case HDIO_GET_IDENTITY:
1020 if (bdev != bdev->bd_contains)
1021 return -EINVAL;
1022 if (drive->id_read == 0)
1023 return -ENOMSG;
1024 if (copy_to_user(p, drive->id, (cmd == HDIO_GET_IDENTITY) ? sizeof(*drive->id) : 142))
1025 return -EFAULT;
1026 return 0;
1027
1028 case HDIO_GET_NICE:
1029 return put_user(drive->dsc_overlap << IDE_NICE_DSC_OVERLAP |
1030 drive->atapi_overlap << IDE_NICE_ATAPI_OVERLAP |
1031 drive->nice0 << IDE_NICE_0 |
1032 drive->nice1 << IDE_NICE_1 |
1033 drive->nice2 << IDE_NICE_2,
1034 (long __user *) arg);
1035
1036 #ifdef CONFIG_IDE_TASK_IOCTL
1037 case HDIO_DRIVE_TASKFILE:
1038 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
1039 return -EACCES;
1040 switch(drive->media) {
1041 case ide_disk:
1042 return ide_taskfile_ioctl(drive, cmd, arg);
1043 default:
1044 return -ENOMSG;
1045 }
1046 #endif /* CONFIG_IDE_TASK_IOCTL */
1047
1048 case HDIO_DRIVE_CMD:
1049 if (!capable(CAP_SYS_RAWIO))
1050 return -EACCES;
1051 return ide_cmd_ioctl(drive, cmd, arg);
1052
1053 case HDIO_DRIVE_TASK:
1054 if (!capable(CAP_SYS_RAWIO))
1055 return -EACCES;
1056 return ide_task_ioctl(drive, cmd, arg);
1057
1058 case HDIO_SCAN_HWIF:
1059 {
1060 hw_regs_t hw;
1061 int args[3];
1062 if (!capable(CAP_SYS_RAWIO)) return -EACCES;
1063 if (copy_from_user(args, p, 3 * sizeof(int)))
1064 return -EFAULT;
1065 memset(&hw, 0, sizeof(hw));
1066 ide_init_hwif_ports(&hw, (unsigned long) args[0],
1067 (unsigned long) args[1], NULL);
1068 hw.irq = args[2];
1069 if (ide_register_hw(&hw, NULL, 0, NULL) == -1)
1070 return -EIO;
1071 return 0;
1072 }
1073 case HDIO_UNREGISTER_HWIF:
1074 if (!capable(CAP_SYS_RAWIO)) return -EACCES;
1075 /* (arg > MAX_HWIFS) checked in function */
1076 ide_unregister(arg);
1077 return 0;
1078 case HDIO_SET_NICE:
1079 if (!capable(CAP_SYS_ADMIN)) return -EACCES;
1080 if (arg != (arg & ((1 << IDE_NICE_DSC_OVERLAP) | (1 << IDE_NICE_1))))
1081 return -EPERM;
1082 drive->dsc_overlap = (arg >> IDE_NICE_DSC_OVERLAP) & 1;
1083 drv = *(ide_driver_t **)bdev->bd_disk->private_data;
1084 if (drive->dsc_overlap && !drv->supports_dsc_overlap) {
1085 drive->dsc_overlap = 0;
1086 return -EPERM;
1087 }
1088 drive->nice1 = (arg >> IDE_NICE_1) & 1;
1089 return 0;
1090 case HDIO_DRIVE_RESET:
1091 {
1092 unsigned long flags;
1093 if (!capable(CAP_SYS_ADMIN)) return -EACCES;
1094
1095 /*
1096 * Abort the current command on the
1097 * group if there is one, taking
1098 * care not to allow anything else
1099 * to be queued and to die on the
1100 * spot if we miss one somehow
1101 */
1102
1103 spin_lock_irqsave(&ide_lock, flags);
1104
1105 if (HWGROUP(drive)->resetting) {
1106 spin_unlock_irqrestore(&ide_lock, flags);
1107 return -EBUSY;
1108 }
1109
1110 ide_abort(drive, "drive reset");
1111
1112 BUG_ON(HWGROUP(drive)->handler);
1113
1114 /* Ensure nothing gets queued after we
1115 drop the lock. Reset will clear the busy */
1116
1117 HWGROUP(drive)->busy = 1;
1118 spin_unlock_irqrestore(&ide_lock, flags);
1119 (void) ide_do_reset(drive);
1120
1121 return 0;
1122 }
1123
1124 case HDIO_GET_BUSSTATE:
1125 if (!capable(CAP_SYS_ADMIN))
1126 return -EACCES;
1127 if (put_user(HWIF(drive)->bus_state, (long __user *)arg))
1128 return -EFAULT;
1129 return 0;
1130
1131 case HDIO_SET_BUSSTATE:
1132 if (!capable(CAP_SYS_ADMIN))
1133 return -EACCES;
1134 if (HWIF(drive)->busproc)
1135 return HWIF(drive)->busproc(drive, (int)arg);
1136 return -EOPNOTSUPP;
1137 default:
1138 return -EINVAL;
1139 }
1140
1141 read_val:
1142 mutex_lock(&ide_setting_mtx);
1143 spin_lock_irqsave(&ide_lock, flags);
1144 err = *val;
1145 spin_unlock_irqrestore(&ide_lock, flags);
1146 mutex_unlock(&ide_setting_mtx);
1147 return err >= 0 ? put_user(err, (long __user *)arg) : err;
1148
1149 set_val:
1150 if (bdev != bdev->bd_contains)
1151 err = -EINVAL;
1152 else {
1153 if (!capable(CAP_SYS_ADMIN))
1154 err = -EACCES;
1155 else {
1156 mutex_lock(&ide_setting_mtx);
1157 err = setfunc(drive, arg);
1158 mutex_unlock(&ide_setting_mtx);
1159 }
1160 }
1161 return err;
1162 }
1163
1164 EXPORT_SYMBOL(generic_ide_ioctl);
1165
1166 /*
1167 * stridx() returns the offset of c within s,
1168 * or -1 if c is '\0' or not found within s.
1169 */
1170 static int __init stridx (const char *s, char c)
1171 {
1172 char *i = strchr(s, c);
1173 return (i && c) ? i - s : -1;
1174 }
1175
1176 /*
1177 * match_parm() does parsing for ide_setup():
1178 *
1179 * 1. the first char of s must be '='.
1180 * 2. if the remainder matches one of the supplied keywords,
1181 * the index (1 based) of the keyword is negated and returned.
1182 * 3. if the remainder is a series of no more than max_vals numbers
1183 * separated by commas, the numbers are saved in vals[] and a
1184 * count of how many were saved is returned. Base10 is assumed,
1185 * and base16 is allowed when prefixed with "0x".
1186 * 4. otherwise, zero is returned.
1187 */
1188 static int __init match_parm (char *s, const char *keywords[], int vals[], int max_vals)
1189 {
1190 static const char *decimal = "0123456789";
1191 static const char *hex = "0123456789abcdef";
1192 int i, n;
1193
1194 if (*s++ == '=') {
1195 /*
1196 * Try matching against the supplied keywords,
1197 * and return -(index+1) if we match one
1198 */
1199 if (keywords != NULL) {
1200 for (i = 0; *keywords != NULL; ++i) {
1201 if (!strcmp(s, *keywords++))
1202 return -(i+1);
1203 }
1204 }
1205 /*
1206 * Look for a series of no more than "max_vals"
1207 * numeric values separated by commas, in base10,
1208 * or base16 when prefixed with "0x".
1209 * Return a count of how many were found.
1210 */
1211 for (n = 0; (i = stridx(decimal, *s)) >= 0;) {
1212 vals[n] = i;
1213 while ((i = stridx(decimal, *++s)) >= 0)
1214 vals[n] = (vals[n] * 10) + i;
1215 if (*s == 'x' && !vals[n]) {
1216 while ((i = stridx(hex, *++s)) >= 0)
1217 vals[n] = (vals[n] * 0x10) + i;
1218 }
1219 if (++n == max_vals)
1220 break;
1221 if (*s == ',' || *s == ';')
1222 ++s;
1223 }
1224 if (!*s)
1225 return n;
1226 }
1227 return 0; /* zero = nothing matched */
1228 }
1229
1230 #ifdef CONFIG_BLK_DEV_ALI14XX
1231 extern int probe_ali14xx;
1232 extern int ali14xx_init(void);
1233 #endif
1234 #ifdef CONFIG_BLK_DEV_UMC8672
1235 extern int probe_umc8672;
1236 extern int umc8672_init(void);
1237 #endif
1238 #ifdef CONFIG_BLK_DEV_DTC2278
1239 extern int probe_dtc2278;
1240 extern int dtc2278_init(void);
1241 #endif
1242 #ifdef CONFIG_BLK_DEV_HT6560B
1243 extern int probe_ht6560b;
1244 extern int ht6560b_init(void);
1245 #endif
1246 #ifdef CONFIG_BLK_DEV_QD65XX
1247 extern int probe_qd65xx;
1248 extern int qd65xx_init(void);
1249 #endif
1250
1251 static int __initdata is_chipset_set[MAX_HWIFS];
1252
1253 /*
1254 * ide_setup() gets called VERY EARLY during initialization,
1255 * to handle kernel "command line" strings beginning with "hdx=" or "ide".
1256 *
1257 * Remember to update Documentation/ide.txt if you change something here.
1258 */
1259 static int __init ide_setup(char *s)
1260 {
1261 int i, vals[3];
1262 ide_hwif_t *hwif;
1263 ide_drive_t *drive;
1264 unsigned int hw, unit;
1265 const char max_drive = 'a' + ((MAX_HWIFS * MAX_DRIVES) - 1);
1266 const char max_hwif = '0' + (MAX_HWIFS - 1);
1267
1268
1269 if (strncmp(s,"hd",2) == 0 && s[2] == '=') /* hd= is for hd.c */
1270 return 0; /* driver and not us */
1271
1272 if (strncmp(s,"ide",3) && strncmp(s,"idebus",6) && strncmp(s,"hd",2))
1273 return 0;
1274
1275 printk(KERN_INFO "ide_setup: %s", s);
1276 init_ide_data ();
1277
1278 #ifdef CONFIG_BLK_DEV_IDEDOUBLER
1279 if (!strcmp(s, "ide=doubler")) {
1280 extern int ide_doubler;
1281
1282 printk(" : Enabled support for IDE doublers\n");
1283 ide_doubler = 1;
1284 return 1;
1285 }
1286 #endif /* CONFIG_BLK_DEV_IDEDOUBLER */
1287
1288 if (!strcmp(s, "ide=nodma")) {
1289 printk(" : Prevented DMA\n");
1290 noautodma = 1;
1291 goto obsolete_option;
1292 }
1293
1294 #ifdef CONFIG_IDEPCI_PCIBUS_ORDER
1295 if (!strcmp(s, "ide=reverse")) {
1296 ide_scan_direction = 1;
1297 printk(" : Enabled support for IDE inverse scan order.\n");
1298 return 1;
1299 }
1300 #endif
1301
1302 #ifdef CONFIG_BLK_DEV_IDEACPI
1303 if (!strcmp(s, "ide=noacpi")) {
1304 //printk(" : Disable IDE ACPI support.\n");
1305 ide_noacpi = 1;
1306 return 1;
1307 }
1308 if (!strcmp(s, "ide=acpigtf")) {
1309 //printk(" : Enable IDE ACPI _GTF support.\n");
1310 ide_noacpitfs = 0;
1311 return 1;
1312 }
1313 if (!strcmp(s, "ide=acpionboot")) {
1314 //printk(" : Call IDE ACPI methods on boot.\n");
1315 ide_noacpionboot = 0;
1316 return 1;
1317 }
1318 #endif /* CONFIG_BLK_DEV_IDEACPI */
1319
1320 /*
1321 * Look for drive options: "hdx="
1322 */
1323 if (s[0] == 'h' && s[1] == 'd' && s[2] >= 'a' && s[2] <= max_drive) {
1324 const char *hd_words[] = {
1325 "none", "noprobe", "nowerr", "cdrom", "nodma",
1326 "autotune", "noautotune", "minus8", "swapdata", "bswap",
1327 "noflush", "remap", "remap63", "scsi", NULL };
1328 unit = s[2] - 'a';
1329 hw = unit / MAX_DRIVES;
1330 unit = unit % MAX_DRIVES;
1331 hwif = &ide_hwifs[hw];
1332 drive = &hwif->drives[unit];
1333 if (strncmp(s + 4, "ide-", 4) == 0) {
1334 strlcpy(drive->driver_req, s + 4, sizeof(drive->driver_req));
1335 goto done;
1336 }
1337 switch (match_parm(&s[3], hd_words, vals, 3)) {
1338 case -1: /* "none" */
1339 case -2: /* "noprobe" */
1340 drive->noprobe = 1;
1341 goto done;
1342 case -3: /* "nowerr" */
1343 drive->bad_wstat = BAD_R_STAT;
1344 hwif->noprobe = 0;
1345 goto done;
1346 case -4: /* "cdrom" */
1347 drive->present = 1;
1348 drive->media = ide_cdrom;
1349 /* an ATAPI device ignores DRDY */
1350 drive->ready_stat = 0;
1351 hwif->noprobe = 0;
1352 goto done;
1353 case -5: /* nodma */
1354 drive->nodma = 1;
1355 goto done;
1356 case -6: /* "autotune" */
1357 drive->autotune = IDE_TUNE_AUTO;
1358 goto obsolete_option;
1359 case -7: /* "noautotune" */
1360 drive->autotune = IDE_TUNE_NOAUTO;
1361 goto obsolete_option;
1362 case -9: /* "swapdata" */
1363 case -10: /* "bswap" */
1364 drive->bswap = 1;
1365 goto done;
1366 case -11: /* noflush */
1367 drive->noflush = 1;
1368 goto done;
1369 case -12: /* "remap" */
1370 drive->remap_0_to_1 = 1;
1371 goto done;
1372 case -13: /* "remap63" */
1373 drive->sect0 = 63;
1374 goto done;
1375 case -14: /* "scsi" */
1376 drive->scsi = 1;
1377 goto done;
1378 case 3: /* cyl,head,sect */
1379 drive->media = ide_disk;
1380 drive->ready_stat = READY_STAT;
1381 drive->cyl = drive->bios_cyl = vals[0];
1382 drive->head = drive->bios_head = vals[1];
1383 drive->sect = drive->bios_sect = vals[2];
1384 drive->present = 1;
1385 drive->forced_geom = 1;
1386 hwif->noprobe = 0;
1387 goto done;
1388 default:
1389 goto bad_option;
1390 }
1391 }
1392
1393 if (s[0] != 'i' || s[1] != 'd' || s[2] != 'e')
1394 goto bad_option;
1395 /*
1396 * Look for bus speed option: "idebus="
1397 */
1398 if (s[3] == 'b' && s[4] == 'u' && s[5] == 's') {
1399 if (match_parm(&s[6], NULL, vals, 1) != 1)
1400 goto bad_option;
1401 if (vals[0] >= 20 && vals[0] <= 66) {
1402 idebus_parameter = vals[0];
1403 } else
1404 printk(" -- BAD BUS SPEED! Expected value from 20 to 66");
1405 goto done;
1406 }
1407 /*
1408 * Look for interface options: "idex="
1409 */
1410 if (s[3] >= '0' && s[3] <= max_hwif) {
1411 /*
1412 * Be VERY CAREFUL changing this: note hardcoded indexes below
1413 * (-8, -9, -10) are reserved to ease the hardcoding.
1414 */
1415 static const char *ide_words[] = {
1416 "noprobe", "serialize", "minus3", "minus4",
1417 "reset", "minus6", "ata66", "minus8", "minus9",
1418 "minus10", "four", "qd65xx", "ht6560b", "cmd640_vlb",
1419 "dtc2278", "umc8672", "ali14xx", NULL };
1420
1421 hw_regs_t hwregs;
1422
1423 hw = s[3] - '0';
1424 hwif = &ide_hwifs[hw];
1425 i = match_parm(&s[4], ide_words, vals, 3);
1426
1427 /*
1428 * Cryptic check to ensure chipset not already set for hwif.
1429 * Note: we can't depend on hwif->chipset here.
1430 */
1431 if ((i >= -18 && i <= -11) || (i > 0 && i <= 3)) {
1432 /* chipset already specified */
1433 if (is_chipset_set[hw])
1434 goto bad_option;
1435 if (i > -18 && i <= -11) {
1436 /* these drivers are for "ide0=" only */
1437 if (hw != 0)
1438 goto bad_hwif;
1439 /* chipset already specified for 2nd port */
1440 if (is_chipset_set[hw+1])
1441 goto bad_option;
1442 }
1443 is_chipset_set[hw] = 1;
1444 printk("\n");
1445 }
1446
1447 switch (i) {
1448 #ifdef CONFIG_BLK_DEV_ALI14XX
1449 case -17: /* "ali14xx" */
1450 probe_ali14xx = 1;
1451 goto done;
1452 #endif
1453 #ifdef CONFIG_BLK_DEV_UMC8672
1454 case -16: /* "umc8672" */
1455 probe_umc8672 = 1;
1456 goto done;
1457 #endif
1458 #ifdef CONFIG_BLK_DEV_DTC2278
1459 case -15: /* "dtc2278" */
1460 probe_dtc2278 = 1;
1461 goto done;
1462 #endif
1463 #ifdef CONFIG_BLK_DEV_CMD640
1464 case -14: /* "cmd640_vlb" */
1465 {
1466 extern int cmd640_vlb; /* flag for cmd640.c */
1467 cmd640_vlb = 1;
1468 goto done;
1469 }
1470 #endif
1471 #ifdef CONFIG_BLK_DEV_HT6560B
1472 case -13: /* "ht6560b" */
1473 probe_ht6560b = 1;
1474 goto done;
1475 #endif
1476 #ifdef CONFIG_BLK_DEV_QD65XX
1477 case -12: /* "qd65xx" */
1478 probe_qd65xx = 1;
1479 goto done;
1480 #endif
1481 #ifdef CONFIG_BLK_DEV_4DRIVES
1482 case -11: /* "four" drives on one set of ports */
1483 {
1484 ide_hwif_t *mate = &ide_hwifs[hw^1];
1485 mate->drives[0].select.all ^= 0x20;
1486 mate->drives[1].select.all ^= 0x20;
1487 hwif->chipset = mate->chipset = ide_4drives;
1488 mate->irq = hwif->irq;
1489 memcpy(mate->io_ports, hwif->io_ports, sizeof(hwif->io_ports));
1490 hwif->mate = mate;
1491 mate->mate = hwif;
1492 hwif->serialized = mate->serialized = 1;
1493 goto obsolete_option;
1494 }
1495 #endif /* CONFIG_BLK_DEV_4DRIVES */
1496 case -10: /* minus10 */
1497 case -9: /* minus9 */
1498 case -8: /* minus8 */
1499 case -6:
1500 case -4:
1501 case -3:
1502 goto bad_option;
1503 case -7: /* ata66 */
1504 #ifdef CONFIG_BLK_DEV_IDEPCI
1505 /*
1506 * Use ATA_CBL_PATA40_SHORT so drive side
1507 * cable detection is also overriden.
1508 */
1509 hwif->cbl = ATA_CBL_PATA40_SHORT;
1510 goto obsolete_option;
1511 #else
1512 goto bad_hwif;
1513 #endif
1514 case -5: /* "reset" */
1515 hwif->reset = 1;
1516 goto obsolete_option;
1517 case -2: /* "serialize" */
1518 hwif->mate = &ide_hwifs[hw^1];
1519 hwif->mate->mate = hwif;
1520 hwif->serialized = hwif->mate->serialized = 1;
1521 goto obsolete_option;
1522
1523 case -1: /* "noprobe" */
1524 hwif->noprobe = 1;
1525 goto done;
1526
1527 case 1: /* base */
1528 vals[1] = vals[0] + 0x206; /* default ctl */
1529 case 2: /* base,ctl */
1530 vals[2] = 0; /* default irq = probe for it */
1531 case 3: /* base,ctl,irq */
1532 memset(&hwregs, 0, sizeof(hwregs));
1533 ide_init_hwif_ports(&hwregs, vals[0], vals[1], &hwif->irq);
1534 memcpy(hwif->io_ports, hwregs.io_ports, sizeof(hwif->io_ports));
1535 hwif->irq = vals[2];
1536 hwif->noprobe = 0;
1537 hwif->chipset = ide_forced;
1538 goto obsolete_option;
1539
1540 case 0: goto bad_option;
1541 default:
1542 printk(" -- SUPPORT NOT CONFIGURED IN THIS KERNEL\n");
1543 return 1;
1544 }
1545 }
1546 bad_option:
1547 printk(" -- BAD OPTION\n");
1548 return 1;
1549 obsolete_option:
1550 printk(" -- OBSOLETE OPTION, WILL BE REMOVED SOON!\n");
1551 return 1;
1552 bad_hwif:
1553 printk("-- NOT SUPPORTED ON ide%d", hw);
1554 done:
1555 printk("\n");
1556 return 1;
1557 }
1558
1559 extern void __init pnpide_init(void);
1560 extern void __exit pnpide_exit(void);
1561 extern void __init h8300_ide_init(void);
1562
1563 /*
1564 * probe_for_hwifs() finds/initializes "known" IDE interfaces
1565 */
1566 static void __init probe_for_hwifs (void)
1567 {
1568 #ifdef CONFIG_IDEPCI_PCIBUS_ORDER
1569 ide_scan_pcibus(ide_scan_direction);
1570 #endif
1571
1572 #ifdef CONFIG_ETRAX_IDE
1573 {
1574 extern void init_e100_ide(void);
1575 init_e100_ide();
1576 }
1577 #endif /* CONFIG_ETRAX_IDE */
1578 #ifdef CONFIG_BLK_DEV_CMD640
1579 {
1580 extern void ide_probe_for_cmd640x(void);
1581 ide_probe_for_cmd640x();
1582 }
1583 #endif /* CONFIG_BLK_DEV_CMD640 */
1584 #ifdef CONFIG_BLK_DEV_IDE_PMAC
1585 {
1586 extern int pmac_ide_probe(void);
1587 (void)pmac_ide_probe();
1588 }
1589 #endif /* CONFIG_BLK_DEV_IDE_PMAC */
1590 #ifdef CONFIG_BLK_DEV_GAYLE
1591 {
1592 extern void gayle_init(void);
1593 gayle_init();
1594 }
1595 #endif /* CONFIG_BLK_DEV_GAYLE */
1596 #ifdef CONFIG_BLK_DEV_FALCON_IDE
1597 {
1598 extern void falconide_init(void);
1599 falconide_init();
1600 }
1601 #endif /* CONFIG_BLK_DEV_FALCON_IDE */
1602 #ifdef CONFIG_BLK_DEV_MAC_IDE
1603 {
1604 extern void macide_init(void);
1605 macide_init();
1606 }
1607 #endif /* CONFIG_BLK_DEV_MAC_IDE */
1608 #ifdef CONFIG_BLK_DEV_Q40IDE
1609 {
1610 extern void q40ide_init(void);
1611 q40ide_init();
1612 }
1613 #endif /* CONFIG_BLK_DEV_Q40IDE */
1614 #ifdef CONFIG_BLK_DEV_BUDDHA
1615 {
1616 extern void buddha_init(void);
1617 buddha_init();
1618 }
1619 #endif /* CONFIG_BLK_DEV_BUDDHA */
1620 #ifdef CONFIG_BLK_DEV_IDEPNP
1621 pnpide_init();
1622 #endif
1623 #ifdef CONFIG_H8300
1624 h8300_ide_init();
1625 #endif
1626 }
1627
1628 /*
1629 * Probe module
1630 */
1631
1632 EXPORT_SYMBOL(ide_lock);
1633
1634 static int ide_bus_match(struct device *dev, struct device_driver *drv)
1635 {
1636 return 1;
1637 }
1638
1639 static char *media_string(ide_drive_t *drive)
1640 {
1641 switch (drive->media) {
1642 case ide_disk:
1643 return "disk";
1644 case ide_cdrom:
1645 return "cdrom";
1646 case ide_tape:
1647 return "tape";
1648 case ide_floppy:
1649 return "floppy";
1650 case ide_optical:
1651 return "optical";
1652 default:
1653 return "UNKNOWN";
1654 }
1655 }
1656
1657 static ssize_t media_show(struct device *dev, struct device_attribute *attr, char *buf)
1658 {
1659 ide_drive_t *drive = to_ide_device(dev);
1660 return sprintf(buf, "%s\n", media_string(drive));
1661 }
1662
1663 static ssize_t drivename_show(struct device *dev, struct device_attribute *attr, char *buf)
1664 {
1665 ide_drive_t *drive = to_ide_device(dev);
1666 return sprintf(buf, "%s\n", drive->name);
1667 }
1668
1669 static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf)
1670 {
1671 ide_drive_t *drive = to_ide_device(dev);
1672 return sprintf(buf, "ide:m-%s\n", media_string(drive));
1673 }
1674
1675 static ssize_t model_show(struct device *dev, struct device_attribute *attr,
1676 char *buf)
1677 {
1678 ide_drive_t *drive = to_ide_device(dev);
1679 return sprintf(buf, "%s\n", drive->id->model);
1680 }
1681
1682 static ssize_t firmware_show(struct device *dev, struct device_attribute *attr,
1683 char *buf)
1684 {
1685 ide_drive_t *drive = to_ide_device(dev);
1686 return sprintf(buf, "%s\n", drive->id->fw_rev);
1687 }
1688
1689 static ssize_t serial_show(struct device *dev, struct device_attribute *attr,
1690 char *buf)
1691 {
1692 ide_drive_t *drive = to_ide_device(dev);
1693 return sprintf(buf, "%s\n", drive->id->serial_no);
1694 }
1695
1696 static struct device_attribute ide_dev_attrs[] = {
1697 __ATTR_RO(media),
1698 __ATTR_RO(drivename),
1699 __ATTR_RO(modalias),
1700 __ATTR_RO(model),
1701 __ATTR_RO(firmware),
1702 __ATTR(serial, 0400, serial_show, NULL),
1703 __ATTR_NULL
1704 };
1705
1706 static int ide_uevent(struct device *dev, struct kobj_uevent_env *env)
1707 {
1708 ide_drive_t *drive = to_ide_device(dev);
1709
1710 add_uevent_var(env, "MEDIA=%s", media_string(drive));
1711 add_uevent_var(env, "DRIVENAME=%s", drive->name);
1712 add_uevent_var(env, "MODALIAS=ide:m-%s", media_string(drive));
1713 return 0;
1714 }
1715
1716 static int generic_ide_probe(struct device *dev)
1717 {
1718 ide_drive_t *drive = to_ide_device(dev);
1719 ide_driver_t *drv = to_ide_driver(dev->driver);
1720
1721 return drv->probe ? drv->probe(drive) : -ENODEV;
1722 }
1723
1724 static int generic_ide_remove(struct device *dev)
1725 {
1726 ide_drive_t *drive = to_ide_device(dev);
1727 ide_driver_t *drv = to_ide_driver(dev->driver);
1728
1729 if (drv->remove)
1730 drv->remove(drive);
1731
1732 return 0;
1733 }
1734
1735 static void generic_ide_shutdown(struct device *dev)
1736 {
1737 ide_drive_t *drive = to_ide_device(dev);
1738 ide_driver_t *drv = to_ide_driver(dev->driver);
1739
1740 if (dev->driver && drv->shutdown)
1741 drv->shutdown(drive);
1742 }
1743
1744 struct bus_type ide_bus_type = {
1745 .name = "ide",
1746 .match = ide_bus_match,
1747 .uevent = ide_uevent,
1748 .probe = generic_ide_probe,
1749 .remove = generic_ide_remove,
1750 .shutdown = generic_ide_shutdown,
1751 .dev_attrs = ide_dev_attrs,
1752 .suspend = generic_ide_suspend,
1753 .resume = generic_ide_resume,
1754 };
1755
1756 EXPORT_SYMBOL_GPL(ide_bus_type);
1757
1758 /*
1759 * This is gets invoked once during initialization, to set *everything* up
1760 */
1761 static int __init ide_init(void)
1762 {
1763 int ret;
1764
1765 printk(KERN_INFO "Uniform Multi-Platform E-IDE driver " REVISION "\n");
1766 system_bus_speed = ide_system_bus_speed();
1767
1768 ret = bus_register(&ide_bus_type);
1769 if (ret < 0) {
1770 printk(KERN_WARNING "IDE: bus_register error: %d\n", ret);
1771 return ret;
1772 }
1773
1774 init_ide_data();
1775
1776 proc_ide_create();
1777
1778 #ifdef CONFIG_BLK_DEV_ALI14XX
1779 if (probe_ali14xx)
1780 (void)ali14xx_init();
1781 #endif
1782 #ifdef CONFIG_BLK_DEV_UMC8672
1783 if (probe_umc8672)
1784 (void)umc8672_init();
1785 #endif
1786 #ifdef CONFIG_BLK_DEV_DTC2278
1787 if (probe_dtc2278)
1788 (void)dtc2278_init();
1789 #endif
1790 #ifdef CONFIG_BLK_DEV_HT6560B
1791 if (probe_ht6560b)
1792 (void)ht6560b_init();
1793 #endif
1794 #ifdef CONFIG_BLK_DEV_QD65XX
1795 if (probe_qd65xx)
1796 (void)qd65xx_init();
1797 #endif
1798
1799 /* Probe for special PCI and other "known" interface chipsets. */
1800 probe_for_hwifs();
1801
1802 return 0;
1803 }
1804
1805 #ifdef MODULE
1806 static char *options = NULL;
1807 module_param(options, charp, 0);
1808 MODULE_LICENSE("GPL");
1809
1810 static void __init parse_options (char *line)
1811 {
1812 char *next = line;
1813
1814 if (line == NULL || !*line)
1815 return;
1816 while ((line = next) != NULL) {
1817 if ((next = strchr(line,' ')) != NULL)
1818 *next++ = 0;
1819 if (!ide_setup(line))
1820 printk (KERN_INFO "Unknown option '%s'\n", line);
1821 }
1822 }
1823
1824 int __init init_module (void)
1825 {
1826 parse_options(options);
1827 return ide_init();
1828 }
1829
1830 void __exit cleanup_module (void)
1831 {
1832 int index;
1833
1834 for (index = 0; index < MAX_HWIFS; ++index)
1835 ide_unregister(index);
1836
1837 #ifdef CONFIG_BLK_DEV_IDEPNP
1838 pnpide_exit();
1839 #endif
1840
1841 proc_ide_destroy();
1842
1843 bus_unregister(&ide_bus_type);
1844 }
1845
1846 #else /* !MODULE */
1847
1848 __setup("", ide_setup);
1849
1850 module_init(ide_init);
1851
1852 #endif /* MODULE */
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