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