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[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / ide / ide.c
1 /*
2 * linux/drivers/ide/ide.c Version 7.00beta2 Mar 05 2003
3 *
4 * Copyright (C) 1994-1998 Linus Torvalds & authors (see below)
5 */
6
7 /*
8 * Mostly written by Mark Lord <mlord@pobox.com>
9 * and Gadi Oxman <gadio@netvision.net.il>
10 * and Andre Hedrick <andre@linux-ide.org>
11 *
12 * See linux/MAINTAINERS for address of current maintainer.
13 *
14 * This is the multiple IDE interface driver, as evolved from hd.c.
15 * It supports up to MAX_HWIFS IDE interfaces, on one or more IRQs
16 * (usually 14 & 15).
17 * There can be up to two drives per interface, as per the ATA-2 spec.
18 *
19 * ...
20 *
21 * From hd.c:
22 * |
23 * | It traverses the request-list, using interrupts to jump between functions.
24 * | As nearly all functions can be called within interrupts, we may not sleep.
25 * | Special care is recommended. Have Fun!
26 * |
27 * | modified by Drew Eckhardt to check nr of hd's from the CMOS.
28 * |
29 * | Thanks to Branko Lankester, lankeste@fwi.uva.nl, who found a bug
30 * | in the early extended-partition checks and added DM partitions.
31 * |
32 * | Early work on error handling by Mika Liljeberg (liljeber@cs.Helsinki.FI).
33 * |
34 * | IRQ-unmask, drive-id, multiple-mode, support for ">16 heads",
35 * | and general streamlining by Mark Lord (mlord@pobox.com).
36 *
37 * October, 1994 -- Complete line-by-line overhaul for linux 1.1.x, by:
38 *
39 * Mark Lord (mlord@pobox.com) (IDE Perf.Pkg)
40 * Delman Lee (delman@ieee.org) ("Mr. atdisk2")
41 * Scott Snyder (snyder@fnald0.fnal.gov) (ATAPI IDE cd-rom)
42 *
43 * This was a rewrite of just about everything from hd.c, though some original
44 * code is still sprinkled about. Think of it as a major evolution, with
45 * inspiration from lots of linux users, esp. hamish@zot.apana.org.au
46 */
47
48 #define REVISION "Revision: 7.00alpha2"
49 #define VERSION "Id: ide.c 7.00a2 20020906"
50
51 #define _IDE_C /* Tell ide.h it's really us */
52
53 #include <linux/module.h>
54 #include <linux/types.h>
55 #include <linux/string.h>
56 #include <linux/kernel.h>
57 #include <linux/timer.h>
58 #include <linux/mm.h>
59 #include <linux/interrupt.h>
60 #include <linux/major.h>
61 #include <linux/errno.h>
62 #include <linux/genhd.h>
63 #include <linux/blkpg.h>
64 #include <linux/slab.h>
65 #include <linux/init.h>
66 #include <linux/pci.h>
67 #include <linux/delay.h>
68 #include <linux/ide.h>
69 #include <linux/completion.h>
70 #include <linux/reboot.h>
71 #include <linux/cdrom.h>
72 #include <linux/seq_file.h>
73 #include <linux/device.h>
74 #include <linux/bitops.h>
75
76 #include <asm/byteorder.h>
77 #include <asm/irq.h>
78 #include <asm/uaccess.h>
79 #include <asm/io.h>
80
81
82 /* default maximum number of failures */
83 #define IDE_DEFAULT_MAX_FAILURES 1
84
85 static const u8 ide_hwif_to_major[] = { IDE0_MAJOR, IDE1_MAJOR,
86 IDE2_MAJOR, IDE3_MAJOR,
87 IDE4_MAJOR, IDE5_MAJOR,
88 IDE6_MAJOR, IDE7_MAJOR,
89 IDE8_MAJOR, IDE9_MAJOR };
90
91 static int idebus_parameter; /* holds the "idebus=" parameter */
92 static int system_bus_speed; /* holds what we think is VESA/PCI bus speed */
93
94 DEFINE_MUTEX(ide_cfg_mtx);
95 __cacheline_aligned_in_smp DEFINE_SPINLOCK(ide_lock);
96
97 #ifdef CONFIG_IDEPCI_PCIBUS_ORDER
98 static int ide_scan_direction; /* THIS was formerly 2.2.x pci=reverse */
99 #endif
100
101 int noautodma = 0;
102
103 #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 }
222
223 /**
224 * ide_system_bus_speed - guess bus speed
225 *
226 * ide_system_bus_speed() returns what we think is the system VESA/PCI
227 * bus speed (in MHz). This is used for calculating interface PIO timings.
228 * The default is 40 for known PCI systems, 50 otherwise.
229 * The "idebus=xx" parameter can be used to override this value.
230 * The actual value to be used is computed/displayed the first time
231 * through. Drivers should only use this as a last resort.
232 *
233 * Returns a guessed speed in MHz.
234 */
235
236 static int ide_system_bus_speed(void)
237 {
238 #ifdef CONFIG_PCI
239 static struct pci_device_id pci_default[] = {
240 { PCI_DEVICE(PCI_ANY_ID, PCI_ANY_ID) },
241 { }
242 };
243 #else
244 #define pci_default 0
245 #endif /* CONFIG_PCI */
246
247 if (!system_bus_speed) {
248 if (idebus_parameter) {
249 /* user supplied value */
250 system_bus_speed = idebus_parameter;
251 } else if (pci_dev_present(pci_default)) {
252 /* safe default value for PCI */
253 system_bus_speed = 33;
254 } else {
255 /* safe default value for VESA and PCI */
256 system_bus_speed = 50;
257 }
258 printk(KERN_INFO "ide: Assuming %dMHz system bus speed "
259 "for PIO modes%s\n", system_bus_speed,
260 idebus_parameter ? "" : "; override with idebus=xx");
261 }
262 return system_bus_speed;
263 }
264
265 ide_hwif_t * ide_find_port(unsigned long base)
266 {
267 ide_hwif_t *hwif;
268 int i;
269
270 for (i = 0; i < MAX_HWIFS; i++) {
271 hwif = &ide_hwifs[i];
272 if (hwif->io_ports[IDE_DATA_OFFSET] == base)
273 goto found;
274 }
275
276 for (i = 0; i < MAX_HWIFS; i++) {
277 hwif = &ide_hwifs[i];
278 if (hwif->io_ports[IDE_DATA_OFFSET] == 0)
279 goto found;
280 }
281
282 hwif = NULL;
283 found:
284 return hwif;
285 }
286
287 EXPORT_SYMBOL_GPL(ide_find_port);
288
289 static struct resource* hwif_request_region(ide_hwif_t *hwif,
290 unsigned long addr, int num)
291 {
292 struct resource *res = request_region(addr, num, hwif->name);
293
294 if (!res)
295 printk(KERN_ERR "%s: I/O resource 0x%lX-0x%lX not free.\n",
296 hwif->name, addr, addr+num-1);
297 return res;
298 }
299
300 /**
301 * ide_hwif_request_regions - request resources for IDE
302 * @hwif: interface to use
303 *
304 * Requests all the needed resources for an interface.
305 * Right now core IDE code does this work which is deeply wrong.
306 * MMIO leaves it to the controller driver,
307 * PIO will migrate this way over time.
308 */
309
310 int ide_hwif_request_regions(ide_hwif_t *hwif)
311 {
312 unsigned long addr;
313 unsigned int i;
314
315 if (hwif->mmio)
316 return 0;
317 addr = hwif->io_ports[IDE_CONTROL_OFFSET];
318 if (addr && !hwif_request_region(hwif, addr, 1))
319 goto control_region_busy;
320 hwif->straight8 = 0;
321 addr = hwif->io_ports[IDE_DATA_OFFSET];
322 if ((addr | 7) == hwif->io_ports[IDE_STATUS_OFFSET]) {
323 if (!hwif_request_region(hwif, addr, 8))
324 goto data_region_busy;
325 hwif->straight8 = 1;
326 return 0;
327 }
328 for (i = IDE_DATA_OFFSET; i <= IDE_STATUS_OFFSET; i++) {
329 addr = hwif->io_ports[i];
330 if (!hwif_request_region(hwif, addr, 1)) {
331 while (--i)
332 release_region(addr, 1);
333 goto data_region_busy;
334 }
335 }
336 return 0;
337
338 data_region_busy:
339 addr = hwif->io_ports[IDE_CONTROL_OFFSET];
340 if (addr)
341 release_region(addr, 1);
342 control_region_busy:
343 /* If any errors are return, we drop the hwif interface. */
344 return -EBUSY;
345 }
346
347 /**
348 * ide_hwif_release_regions - free IDE resources
349 *
350 * Note that we only release the standard ports,
351 * and do not even try to handle any extra ports
352 * allocated for weird IDE interface chipsets.
353 *
354 * Note also that we don't yet handle mmio resources here. More
355 * importantly our caller should be doing this so we need to
356 * restructure this as a helper function for drivers.
357 */
358
359 void ide_hwif_release_regions(ide_hwif_t *hwif)
360 {
361 u32 i = 0;
362
363 if (hwif->mmio)
364 return;
365 if (hwif->io_ports[IDE_CONTROL_OFFSET])
366 release_region(hwif->io_ports[IDE_CONTROL_OFFSET], 1);
367 if (hwif->straight8) {
368 release_region(hwif->io_ports[IDE_DATA_OFFSET], 8);
369 return;
370 }
371 for (i = IDE_DATA_OFFSET; i <= IDE_STATUS_OFFSET; i++)
372 if (hwif->io_ports[i])
373 release_region(hwif->io_ports[i], 1);
374 }
375
376 /**
377 * ide_hwif_restore - restore hwif to template
378 * @hwif: hwif to update
379 * @tmp_hwif: template
380 *
381 * Restore hwif to a previous state by copying most settings
382 * from the template.
383 */
384
385 static void ide_hwif_restore(ide_hwif_t *hwif, ide_hwif_t *tmp_hwif)
386 {
387 hwif->hwgroup = tmp_hwif->hwgroup;
388
389 hwif->gendev.parent = tmp_hwif->gendev.parent;
390
391 hwif->proc = tmp_hwif->proc;
392
393 hwif->major = tmp_hwif->major;
394 hwif->straight8 = tmp_hwif->straight8;
395 hwif->bus_state = tmp_hwif->bus_state;
396
397 hwif->host_flags = tmp_hwif->host_flags;
398
399 hwif->pio_mask = tmp_hwif->pio_mask;
400
401 hwif->ultra_mask = tmp_hwif->ultra_mask;
402 hwif->mwdma_mask = tmp_hwif->mwdma_mask;
403 hwif->swdma_mask = tmp_hwif->swdma_mask;
404
405 hwif->cbl = tmp_hwif->cbl;
406
407 hwif->chipset = tmp_hwif->chipset;
408 hwif->hold = tmp_hwif->hold;
409
410 #ifdef CONFIG_BLK_DEV_IDEPCI
411 hwif->pci_dev = tmp_hwif->pci_dev;
412 hwif->cds = tmp_hwif->cds;
413 #endif
414
415 hwif->set_pio_mode = tmp_hwif->set_pio_mode;
416 hwif->set_dma_mode = tmp_hwif->set_dma_mode;
417 hwif->mdma_filter = tmp_hwif->mdma_filter;
418 hwif->udma_filter = tmp_hwif->udma_filter;
419 hwif->selectproc = tmp_hwif->selectproc;
420 hwif->reset_poll = tmp_hwif->reset_poll;
421 hwif->pre_reset = tmp_hwif->pre_reset;
422 hwif->resetproc = tmp_hwif->resetproc;
423 hwif->maskproc = tmp_hwif->maskproc;
424 hwif->quirkproc = tmp_hwif->quirkproc;
425 hwif->busproc = tmp_hwif->busproc;
426
427 hwif->ata_input_data = tmp_hwif->ata_input_data;
428 hwif->ata_output_data = tmp_hwif->ata_output_data;
429 hwif->atapi_input_bytes = tmp_hwif->atapi_input_bytes;
430 hwif->atapi_output_bytes = tmp_hwif->atapi_output_bytes;
431
432 hwif->dma_host_set = tmp_hwif->dma_host_set;
433 hwif->dma_setup = tmp_hwif->dma_setup;
434 hwif->dma_exec_cmd = tmp_hwif->dma_exec_cmd;
435 hwif->dma_start = tmp_hwif->dma_start;
436 hwif->ide_dma_end = tmp_hwif->ide_dma_end;
437 hwif->ide_dma_test_irq = tmp_hwif->ide_dma_test_irq;
438 hwif->ide_dma_clear_irq = tmp_hwif->ide_dma_clear_irq;
439 hwif->dma_lost_irq = tmp_hwif->dma_lost_irq;
440 hwif->dma_timeout = tmp_hwif->dma_timeout;
441
442 hwif->OUTB = tmp_hwif->OUTB;
443 hwif->OUTBSYNC = tmp_hwif->OUTBSYNC;
444 hwif->OUTW = tmp_hwif->OUTW;
445 hwif->OUTSW = tmp_hwif->OUTSW;
446 hwif->OUTSL = tmp_hwif->OUTSL;
447
448 hwif->INB = tmp_hwif->INB;
449 hwif->INW = tmp_hwif->INW;
450 hwif->INSW = tmp_hwif->INSW;
451 hwif->INSL = tmp_hwif->INSL;
452
453 hwif->sg_max_nents = tmp_hwif->sg_max_nents;
454
455 hwif->mmio = tmp_hwif->mmio;
456 hwif->rqsize = tmp_hwif->rqsize;
457
458 #ifndef CONFIG_BLK_DEV_IDECS
459 hwif->irq = tmp_hwif->irq;
460 #endif
461
462 hwif->dma_base = tmp_hwif->dma_base;
463 hwif->dma_command = tmp_hwif->dma_command;
464 hwif->dma_vendor1 = tmp_hwif->dma_vendor1;
465 hwif->dma_status = tmp_hwif->dma_status;
466 hwif->dma_vendor3 = tmp_hwif->dma_vendor3;
467 hwif->dma_prdtable = tmp_hwif->dma_prdtable;
468
469 hwif->config_data = tmp_hwif->config_data;
470 hwif->select_data = tmp_hwif->select_data;
471 hwif->extra_base = tmp_hwif->extra_base;
472 hwif->extra_ports = tmp_hwif->extra_ports;
473
474 hwif->hwif_data = tmp_hwif->hwif_data;
475 }
476
477 /**
478 * ide_unregister - free an IDE interface
479 * @index: index of interface (will change soon to a pointer)
480 *
481 * Perform the final unregister of an IDE interface. At the moment
482 * we don't refcount interfaces so this will also get split up.
483 *
484 * Locking:
485 * The caller must not hold the IDE locks
486 * The drive present/vanishing is not yet properly locked
487 * Take care with the callbacks. These have been split to avoid
488 * deadlocking the IDE layer. The shutdown callback is called
489 * before we take the lock and free resources. It is up to the
490 * caller to be sure there is no pending I/O here, and that
491 * the interface will not be reopened (present/vanishing locking
492 * isn't yet done BTW). After we commit to the final kill we
493 * call the cleanup callback with the ide locks held.
494 *
495 * Unregister restores the hwif structures to the default state.
496 * This is raving bonkers.
497 */
498
499 void ide_unregister(unsigned int index)
500 {
501 ide_drive_t *drive;
502 ide_hwif_t *hwif, *g;
503 static ide_hwif_t tmp_hwif; /* protected by ide_cfg_mtx */
504 ide_hwgroup_t *hwgroup;
505 int irq_count = 0, unit;
506
507 BUG_ON(index >= MAX_HWIFS);
508
509 BUG_ON(in_interrupt());
510 BUG_ON(irqs_disabled());
511 mutex_lock(&ide_cfg_mtx);
512 spin_lock_irq(&ide_lock);
513 hwif = &ide_hwifs[index];
514 if (!hwif->present)
515 goto abort;
516 for (unit = 0; unit < MAX_DRIVES; ++unit) {
517 drive = &hwif->drives[unit];
518 if (!drive->present)
519 continue;
520 spin_unlock_irq(&ide_lock);
521 device_unregister(&drive->gendev);
522 wait_for_completion(&drive->gendev_rel_comp);
523 spin_lock_irq(&ide_lock);
524 }
525 hwif->present = 0;
526
527 spin_unlock_irq(&ide_lock);
528
529 ide_proc_unregister_port(hwif);
530
531 hwgroup = hwif->hwgroup;
532 /*
533 * free the irq if we were the only hwif using it
534 */
535 g = hwgroup->hwif;
536 do {
537 if (g->irq == hwif->irq)
538 ++irq_count;
539 g = g->next;
540 } while (g != hwgroup->hwif);
541 if (irq_count == 1)
542 free_irq(hwif->irq, hwgroup);
543
544 spin_lock_irq(&ide_lock);
545 /*
546 * Note that we only release the standard ports,
547 * and do not even try to handle any extra ports
548 * allocated for weird IDE interface chipsets.
549 */
550 ide_hwif_release_regions(hwif);
551
552 /*
553 * Remove us from the hwgroup, and free
554 * the hwgroup if we were the only member
555 */
556 if (hwif->next == hwif) {
557 BUG_ON(hwgroup->hwif != hwif);
558 kfree(hwgroup);
559 } else {
560 /* There is another interface in hwgroup.
561 * Unlink us, and set hwgroup->drive and ->hwif to
562 * something sane.
563 */
564 g = hwgroup->hwif;
565 while (g->next != hwif)
566 g = g->next;
567 g->next = hwif->next;
568 if (hwgroup->hwif == hwif) {
569 /* Chose a random hwif for hwgroup->hwif.
570 * It's guaranteed that there are no drives
571 * left in the hwgroup.
572 */
573 BUG_ON(hwgroup->drive != NULL);
574 hwgroup->hwif = g;
575 }
576 BUG_ON(hwgroup->hwif == hwif);
577 }
578
579 /* More messed up locking ... */
580 spin_unlock_irq(&ide_lock);
581 device_unregister(&hwif->gendev);
582 wait_for_completion(&hwif->gendev_rel_comp);
583
584 /*
585 * Remove us from the kernel's knowledge
586 */
587 blk_unregister_region(MKDEV(hwif->major, 0), MAX_DRIVES<<PARTN_BITS);
588 kfree(hwif->sg_table);
589 unregister_blkdev(hwif->major, hwif->name);
590 spin_lock_irq(&ide_lock);
591
592 if (hwif->dma_base) {
593 (void) ide_release_dma(hwif);
594
595 hwif->dma_base = 0;
596 hwif->dma_command = 0;
597 hwif->dma_vendor1 = 0;
598 hwif->dma_status = 0;
599 hwif->dma_vendor3 = 0;
600 hwif->dma_prdtable = 0;
601
602 hwif->extra_base = 0;
603 hwif->extra_ports = 0;
604 }
605
606 /* copy original settings */
607 tmp_hwif = *hwif;
608
609 /* restore hwif data to pristine status */
610 ide_init_port_data(hwif, index);
611 init_hwif_default(hwif, index);
612
613 ide_hwif_restore(hwif, &tmp_hwif);
614
615 abort:
616 spin_unlock_irq(&ide_lock);
617 mutex_unlock(&ide_cfg_mtx);
618 }
619
620 EXPORT_SYMBOL(ide_unregister);
621
622
623 /**
624 * ide_setup_ports - set up IDE interface ports
625 * @hw: register descriptions
626 * @base: base register
627 * @offsets: table of register offsets
628 * @ctrl: control register
629 * @ack_irq: IRQ ack
630 * @irq: interrupt lie
631 *
632 * Setup hw_regs_t structure described by parameters. You
633 * may set up the hw structure yourself OR use this routine to
634 * do it for you. This is basically a helper
635 *
636 */
637
638 void ide_setup_ports ( hw_regs_t *hw,
639 unsigned long base, int *offsets,
640 unsigned long ctrl, unsigned long intr,
641 ide_ack_intr_t *ack_intr,
642 /*
643 * ide_io_ops_t *iops,
644 */
645 int irq)
646 {
647 int i;
648
649 memset(hw, 0, sizeof(hw_regs_t));
650 for (i = 0; i < IDE_NR_PORTS; i++) {
651 if (offsets[i] == -1) {
652 switch(i) {
653 case IDE_CONTROL_OFFSET:
654 hw->io_ports[i] = ctrl;
655 break;
656 #if defined(CONFIG_AMIGA) || defined(CONFIG_MAC)
657 case IDE_IRQ_OFFSET:
658 hw->io_ports[i] = intr;
659 break;
660 #endif /* (CONFIG_AMIGA) || (CONFIG_MAC) */
661 default:
662 hw->io_ports[i] = 0;
663 break;
664 }
665 } else {
666 hw->io_ports[i] = base + offsets[i];
667 }
668 }
669 hw->irq = irq;
670 hw->ack_intr = ack_intr;
671 /*
672 * hw->iops = iops;
673 */
674 }
675
676 void ide_init_port_hw(ide_hwif_t *hwif, hw_regs_t *hw)
677 {
678 memcpy(hwif->io_ports, hw->io_ports, sizeof(hwif->io_ports));
679 hwif->irq = hw->irq;
680 hwif->noprobe = 0;
681 hwif->chipset = hw->chipset;
682 hwif->gendev.parent = hw->dev;
683 hwif->ack_intr = hw->ack_intr;
684 }
685 EXPORT_SYMBOL_GPL(ide_init_port_hw);
686
687 /**
688 * ide_register_hw - register IDE interface
689 * @hw: hardware registers
690 * @quirkproc: quirkproc function
691 * @hwifp: pointer to returned hwif
692 *
693 * Register an IDE interface, specifying exactly the registers etc.
694 *
695 * Returns -1 on error.
696 */
697
698 int ide_register_hw(hw_regs_t *hw, void (*quirkproc)(ide_drive_t *),
699 ide_hwif_t **hwifp)
700 {
701 int index, retry = 1;
702 ide_hwif_t *hwif;
703 u8 idx[4] = { 0xff, 0xff, 0xff, 0xff };
704
705 do {
706 for (index = 0; index < MAX_HWIFS; ++index) {
707 hwif = &ide_hwifs[index];
708 if (hwif->io_ports[IDE_DATA_OFFSET] == hw->io_ports[IDE_DATA_OFFSET])
709 goto found;
710 }
711 for (index = 0; index < MAX_HWIFS; ++index) {
712 hwif = &ide_hwifs[index];
713 if (hwif->hold)
714 continue;
715 if (!hwif->present && hwif->mate == NULL)
716 goto found;
717 }
718 for (index = 0; index < MAX_HWIFS; index++)
719 ide_unregister(index);
720 } while (retry--);
721 return -1;
722 found:
723 if (hwif->present)
724 ide_unregister(index);
725 else if (!hwif->hold) {
726 ide_init_port_data(hwif, index);
727 init_hwif_default(hwif, index);
728 }
729 if (hwif->present)
730 return -1;
731
732 ide_init_port_hw(hwif, hw);
733 hwif->quirkproc = quirkproc;
734
735 idx[0] = index;
736
737 ide_device_add(idx);
738
739 if (hwifp)
740 *hwifp = hwif;
741
742 return hwif->present ? index : -1;
743 }
744
745 EXPORT_SYMBOL(ide_register_hw);
746
747 /*
748 * Locks for IDE setting functionality
749 */
750
751 DEFINE_MUTEX(ide_setting_mtx);
752
753 EXPORT_SYMBOL_GPL(ide_setting_mtx);
754
755 /**
756 * ide_spin_wait_hwgroup - wait for group
757 * @drive: drive in the group
758 *
759 * Wait for an IDE device group to go non busy and then return
760 * holding the ide_lock which guards the hwgroup->busy status
761 * and right to use it.
762 */
763
764 int ide_spin_wait_hwgroup (ide_drive_t *drive)
765 {
766 ide_hwgroup_t *hwgroup = HWGROUP(drive);
767 unsigned long timeout = jiffies + (3 * HZ);
768
769 spin_lock_irq(&ide_lock);
770
771 while (hwgroup->busy) {
772 unsigned long lflags;
773 spin_unlock_irq(&ide_lock);
774 local_irq_set(lflags);
775 if (time_after(jiffies, timeout)) {
776 local_irq_restore(lflags);
777 printk(KERN_ERR "%s: channel busy\n", drive->name);
778 return -EBUSY;
779 }
780 local_irq_restore(lflags);
781 spin_lock_irq(&ide_lock);
782 }
783 return 0;
784 }
785
786 EXPORT_SYMBOL(ide_spin_wait_hwgroup);
787
788 int set_io_32bit(ide_drive_t *drive, int arg)
789 {
790 if (drive->no_io_32bit)
791 return -EPERM;
792
793 if (arg < 0 || arg > 1 + (SUPPORT_VLB_SYNC << 1))
794 return -EINVAL;
795
796 if (ide_spin_wait_hwgroup(drive))
797 return -EBUSY;
798
799 drive->io_32bit = arg;
800 #ifdef CONFIG_BLK_DEV_DTC2278
801 if (HWIF(drive)->chipset == ide_dtc2278)
802 HWIF(drive)->drives[!drive->select.b.unit].io_32bit = arg;
803 #endif /* CONFIG_BLK_DEV_DTC2278 */
804
805 spin_unlock_irq(&ide_lock);
806
807 return 0;
808 }
809
810 static int set_ksettings(ide_drive_t *drive, int arg)
811 {
812 if (arg < 0 || arg > 1)
813 return -EINVAL;
814
815 if (ide_spin_wait_hwgroup(drive))
816 return -EBUSY;
817 drive->keep_settings = arg;
818 spin_unlock_irq(&ide_lock);
819
820 return 0;
821 }
822
823 int set_using_dma(ide_drive_t *drive, int arg)
824 {
825 #ifdef CONFIG_BLK_DEV_IDEDMA
826 ide_hwif_t *hwif = drive->hwif;
827 int err = -EPERM;
828
829 if (arg < 0 || arg > 1)
830 return -EINVAL;
831
832 if (!drive->id || !(drive->id->capability & 1))
833 goto out;
834
835 if (hwif->dma_host_set == NULL)
836 goto out;
837
838 err = -EBUSY;
839 if (ide_spin_wait_hwgroup(drive))
840 goto out;
841 /*
842 * set ->busy flag, unlock and let it ride
843 */
844 hwif->hwgroup->busy = 1;
845 spin_unlock_irq(&ide_lock);
846
847 err = 0;
848
849 if (arg) {
850 if (ide_set_dma(drive))
851 err = -EIO;
852 } else
853 ide_dma_off(drive);
854
855 /*
856 * lock, clear ->busy flag and unlock before leaving
857 */
858 spin_lock_irq(&ide_lock);
859 hwif->hwgroup->busy = 0;
860 spin_unlock_irq(&ide_lock);
861 out:
862 return err;
863 #else
864 if (arg < 0 || arg > 1)
865 return -EINVAL;
866
867 return -EPERM;
868 #endif
869 }
870
871 int set_pio_mode(ide_drive_t *drive, int arg)
872 {
873 struct request rq;
874
875 if (arg < 0 || arg > 255)
876 return -EINVAL;
877
878 if (drive->hwif->set_pio_mode == NULL)
879 return -ENOSYS;
880
881 if (drive->special.b.set_tune)
882 return -EBUSY;
883 ide_init_drive_cmd(&rq);
884 drive->tune_req = (u8) arg;
885 drive->special.b.set_tune = 1;
886 (void) ide_do_drive_cmd(drive, &rq, ide_wait);
887 return 0;
888 }
889
890 static int set_unmaskirq(ide_drive_t *drive, int arg)
891 {
892 if (drive->no_unmask)
893 return -EPERM;
894
895 if (arg < 0 || arg > 1)
896 return -EINVAL;
897
898 if (ide_spin_wait_hwgroup(drive))
899 return -EBUSY;
900 drive->unmask = arg;
901 spin_unlock_irq(&ide_lock);
902
903 return 0;
904 }
905
906 /**
907 * system_bus_clock - clock guess
908 *
909 * External version of the bus clock guess used by very old IDE drivers
910 * for things like VLB timings. Should not be used.
911 */
912
913 int system_bus_clock (void)
914 {
915 return((int) ((!system_bus_speed) ? ide_system_bus_speed() : system_bus_speed ));
916 }
917
918 EXPORT_SYMBOL(system_bus_clock);
919
920 static int generic_ide_suspend(struct device *dev, pm_message_t mesg)
921 {
922 ide_drive_t *drive = dev->driver_data;
923 ide_hwif_t *hwif = HWIF(drive);
924 struct request rq;
925 struct request_pm_state rqpm;
926 ide_task_t args;
927 int ret;
928
929 /* Call ACPI _GTM only once */
930 if (!(drive->dn % 2))
931 ide_acpi_get_timing(hwif);
932
933 memset(&rq, 0, sizeof(rq));
934 memset(&rqpm, 0, sizeof(rqpm));
935 memset(&args, 0, sizeof(args));
936 rq.cmd_type = REQ_TYPE_PM_SUSPEND;
937 rq.special = &args;
938 rq.data = &rqpm;
939 rqpm.pm_step = ide_pm_state_start_suspend;
940 if (mesg.event == PM_EVENT_PRETHAW)
941 mesg.event = PM_EVENT_FREEZE;
942 rqpm.pm_state = mesg.event;
943
944 ret = ide_do_drive_cmd(drive, &rq, ide_wait);
945 /* only call ACPI _PS3 after both drivers are suspended */
946 if (!ret && (((drive->dn % 2) && hwif->drives[0].present
947 && hwif->drives[1].present)
948 || !hwif->drives[0].present
949 || !hwif->drives[1].present))
950 ide_acpi_set_state(hwif, 0);
951 return ret;
952 }
953
954 static int generic_ide_resume(struct device *dev)
955 {
956 ide_drive_t *drive = dev->driver_data;
957 ide_hwif_t *hwif = HWIF(drive);
958 struct request rq;
959 struct request_pm_state rqpm;
960 ide_task_t args;
961 int err;
962
963 /* Call ACPI _STM only once */
964 if (!(drive->dn % 2)) {
965 ide_acpi_set_state(hwif, 1);
966 ide_acpi_push_timing(hwif);
967 }
968
969 ide_acpi_exec_tfs(drive);
970
971 memset(&rq, 0, sizeof(rq));
972 memset(&rqpm, 0, sizeof(rqpm));
973 memset(&args, 0, sizeof(args));
974 rq.cmd_type = REQ_TYPE_PM_RESUME;
975 rq.special = &args;
976 rq.data = &rqpm;
977 rqpm.pm_step = ide_pm_state_start_resume;
978 rqpm.pm_state = PM_EVENT_ON;
979
980 err = ide_do_drive_cmd(drive, &rq, ide_head_wait);
981
982 if (err == 0 && dev->driver) {
983 ide_driver_t *drv = to_ide_driver(dev->driver);
984
985 if (drv->resume)
986 drv->resume(drive);
987 }
988
989 return err;
990 }
991
992 int generic_ide_ioctl(ide_drive_t *drive, struct file *file, struct block_device *bdev,
993 unsigned int cmd, unsigned long arg)
994 {
995 unsigned long flags;
996 ide_driver_t *drv;
997 void __user *p = (void __user *)arg;
998 int err = 0, (*setfunc)(ide_drive_t *, int);
999 u8 *val;
1000
1001 switch (cmd) {
1002 case HDIO_GET_32BIT: val = &drive->io_32bit; goto read_val;
1003 case HDIO_GET_KEEPSETTINGS: val = &drive->keep_settings; goto read_val;
1004 case HDIO_GET_UNMASKINTR: val = &drive->unmask; goto read_val;
1005 case HDIO_GET_DMA: val = &drive->using_dma; goto read_val;
1006 case HDIO_SET_32BIT: setfunc = set_io_32bit; goto set_val;
1007 case HDIO_SET_KEEPSETTINGS: setfunc = set_ksettings; goto set_val;
1008 case HDIO_SET_PIO_MODE: setfunc = set_pio_mode; goto set_val;
1009 case HDIO_SET_UNMASKINTR: setfunc = set_unmaskirq; goto set_val;
1010 case HDIO_SET_DMA: setfunc = set_using_dma; goto set_val;
1011 }
1012
1013 switch (cmd) {
1014 case HDIO_OBSOLETE_IDENTITY:
1015 case HDIO_GET_IDENTITY:
1016 if (bdev != bdev->bd_contains)
1017 return -EINVAL;
1018 if (drive->id_read == 0)
1019 return -ENOMSG;
1020 if (copy_to_user(p, drive->id, (cmd == HDIO_GET_IDENTITY) ? sizeof(*drive->id) : 142))
1021 return -EFAULT;
1022 return 0;
1023
1024 case HDIO_GET_NICE:
1025 return put_user(drive->dsc_overlap << IDE_NICE_DSC_OVERLAP |
1026 drive->atapi_overlap << IDE_NICE_ATAPI_OVERLAP |
1027 drive->nice0 << IDE_NICE_0 |
1028 drive->nice1 << IDE_NICE_1 |
1029 drive->nice2 << IDE_NICE_2,
1030 (long __user *) arg);
1031
1032 #ifdef CONFIG_IDE_TASK_IOCTL
1033 case HDIO_DRIVE_TASKFILE:
1034 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
1035 return -EACCES;
1036 switch(drive->media) {
1037 case ide_disk:
1038 return ide_taskfile_ioctl(drive, cmd, arg);
1039 default:
1040 return -ENOMSG;
1041 }
1042 #endif /* CONFIG_IDE_TASK_IOCTL */
1043
1044 case HDIO_DRIVE_CMD:
1045 if (!capable(CAP_SYS_RAWIO))
1046 return -EACCES;
1047 return ide_cmd_ioctl(drive, cmd, arg);
1048
1049 case HDIO_DRIVE_TASK:
1050 if (!capable(CAP_SYS_RAWIO))
1051 return -EACCES;
1052 return ide_task_ioctl(drive, cmd, arg);
1053
1054 case HDIO_SCAN_HWIF:
1055 {
1056 hw_regs_t hw;
1057 int args[3];
1058 if (!capable(CAP_SYS_RAWIO)) return -EACCES;
1059 if (copy_from_user(args, p, 3 * sizeof(int)))
1060 return -EFAULT;
1061 memset(&hw, 0, sizeof(hw));
1062 ide_init_hwif_ports(&hw, (unsigned long) args[0],
1063 (unsigned long) args[1], NULL);
1064 hw.irq = args[2];
1065 if (ide_register_hw(&hw, NULL, NULL) == -1)
1066 return -EIO;
1067 return 0;
1068 }
1069 case HDIO_UNREGISTER_HWIF:
1070 if (!capable(CAP_SYS_RAWIO)) return -EACCES;
1071 /* (arg > MAX_HWIFS) checked in function */
1072 ide_unregister(arg);
1073 return 0;
1074 case HDIO_SET_NICE:
1075 if (!capable(CAP_SYS_ADMIN)) return -EACCES;
1076 if (arg != (arg & ((1 << IDE_NICE_DSC_OVERLAP) | (1 << IDE_NICE_1))))
1077 return -EPERM;
1078 drive->dsc_overlap = (arg >> IDE_NICE_DSC_OVERLAP) & 1;
1079 drv = *(ide_driver_t **)bdev->bd_disk->private_data;
1080 if (drive->dsc_overlap && !drv->supports_dsc_overlap) {
1081 drive->dsc_overlap = 0;
1082 return -EPERM;
1083 }
1084 drive->nice1 = (arg >> IDE_NICE_1) & 1;
1085 return 0;
1086 case HDIO_DRIVE_RESET:
1087 {
1088 unsigned long flags;
1089 if (!capable(CAP_SYS_ADMIN)) return -EACCES;
1090
1091 /*
1092 * Abort the current command on the
1093 * group if there is one, taking
1094 * care not to allow anything else
1095 * to be queued and to die on the
1096 * spot if we miss one somehow
1097 */
1098
1099 spin_lock_irqsave(&ide_lock, flags);
1100
1101 if (HWGROUP(drive)->resetting) {
1102 spin_unlock_irqrestore(&ide_lock, flags);
1103 return -EBUSY;
1104 }
1105
1106 ide_abort(drive, "drive reset");
1107
1108 BUG_ON(HWGROUP(drive)->handler);
1109
1110 /* Ensure nothing gets queued after we
1111 drop the lock. Reset will clear the busy */
1112
1113 HWGROUP(drive)->busy = 1;
1114 spin_unlock_irqrestore(&ide_lock, flags);
1115 (void) ide_do_reset(drive);
1116
1117 return 0;
1118 }
1119
1120 case HDIO_GET_BUSSTATE:
1121 if (!capable(CAP_SYS_ADMIN))
1122 return -EACCES;
1123 if (put_user(HWIF(drive)->bus_state, (long __user *)arg))
1124 return -EFAULT;
1125 return 0;
1126
1127 case HDIO_SET_BUSSTATE:
1128 if (!capable(CAP_SYS_ADMIN))
1129 return -EACCES;
1130 if (HWIF(drive)->busproc)
1131 return HWIF(drive)->busproc(drive, (int)arg);
1132 return -EOPNOTSUPP;
1133 default:
1134 return -EINVAL;
1135 }
1136
1137 read_val:
1138 mutex_lock(&ide_setting_mtx);
1139 spin_lock_irqsave(&ide_lock, flags);
1140 err = *val;
1141 spin_unlock_irqrestore(&ide_lock, flags);
1142 mutex_unlock(&ide_setting_mtx);
1143 return err >= 0 ? put_user(err, (long __user *)arg) : err;
1144
1145 set_val:
1146 if (bdev != bdev->bd_contains)
1147 err = -EINVAL;
1148 else {
1149 if (!capable(CAP_SYS_ADMIN))
1150 err = -EACCES;
1151 else {
1152 mutex_lock(&ide_setting_mtx);
1153 err = setfunc(drive, arg);
1154 mutex_unlock(&ide_setting_mtx);
1155 }
1156 }
1157 return err;
1158 }
1159
1160 EXPORT_SYMBOL(generic_ide_ioctl);
1161
1162 /*
1163 * stridx() returns the offset of c within s,
1164 * or -1 if c is '\0' or not found within s.
1165 */
1166 static int __init stridx (const char *s, char c)
1167 {
1168 char *i = strchr(s, c);
1169 return (i && c) ? i - s : -1;
1170 }
1171
1172 /*
1173 * match_parm() does parsing for ide_setup():
1174 *
1175 * 1. the first char of s must be '='.
1176 * 2. if the remainder matches one of the supplied keywords,
1177 * the index (1 based) of the keyword is negated and returned.
1178 * 3. if the remainder is a series of no more than max_vals numbers
1179 * separated by commas, the numbers are saved in vals[] and a
1180 * count of how many were saved is returned. Base10 is assumed,
1181 * and base16 is allowed when prefixed with "0x".
1182 * 4. otherwise, zero is returned.
1183 */
1184 static int __init match_parm (char *s, const char *keywords[], int vals[], int max_vals)
1185 {
1186 static const char *decimal = "0123456789";
1187 static const char *hex = "0123456789abcdef";
1188 int i, n;
1189
1190 if (*s++ == '=') {
1191 /*
1192 * Try matching against the supplied keywords,
1193 * and return -(index+1) if we match one
1194 */
1195 if (keywords != NULL) {
1196 for (i = 0; *keywords != NULL; ++i) {
1197 if (!strcmp(s, *keywords++))
1198 return -(i+1);
1199 }
1200 }
1201 /*
1202 * Look for a series of no more than "max_vals"
1203 * numeric values separated by commas, in base10,
1204 * or base16 when prefixed with "0x".
1205 * Return a count of how many were found.
1206 */
1207 for (n = 0; (i = stridx(decimal, *s)) >= 0;) {
1208 vals[n] = i;
1209 while ((i = stridx(decimal, *++s)) >= 0)
1210 vals[n] = (vals[n] * 10) + i;
1211 if (*s == 'x' && !vals[n]) {
1212 while ((i = stridx(hex, *++s)) >= 0)
1213 vals[n] = (vals[n] * 0x10) + i;
1214 }
1215 if (++n == max_vals)
1216 break;
1217 if (*s == ',' || *s == ';')
1218 ++s;
1219 }
1220 if (!*s)
1221 return n;
1222 }
1223 return 0; /* zero = nothing matched */
1224 }
1225
1226 #ifdef CONFIG_BLK_DEV_ALI14XX
1227 extern int probe_ali14xx;
1228 extern int ali14xx_init(void);
1229 #endif
1230 #ifdef CONFIG_BLK_DEV_UMC8672
1231 extern int probe_umc8672;
1232 extern int umc8672_init(void);
1233 #endif
1234 #ifdef CONFIG_BLK_DEV_DTC2278
1235 extern int probe_dtc2278;
1236 extern int dtc2278_init(void);
1237 #endif
1238 #ifdef CONFIG_BLK_DEV_HT6560B
1239 extern int probe_ht6560b;
1240 extern int ht6560b_init(void);
1241 #endif
1242 #ifdef CONFIG_BLK_DEV_QD65XX
1243 extern int probe_qd65xx;
1244 extern int qd65xx_init(void);
1245 #endif
1246
1247 static int __initdata is_chipset_set[MAX_HWIFS];
1248
1249 /*
1250 * ide_setup() gets called VERY EARLY during initialization,
1251 * to handle kernel "command line" strings beginning with "hdx=" or "ide".
1252 *
1253 * Remember to update Documentation/ide.txt if you change something here.
1254 */
1255 static int __init ide_setup(char *s)
1256 {
1257 int i, vals[3];
1258 ide_hwif_t *hwif;
1259 ide_drive_t *drive;
1260 unsigned int hw, unit;
1261 const char max_drive = 'a' + ((MAX_HWIFS * MAX_DRIVES) - 1);
1262 const char max_hwif = '0' + (MAX_HWIFS - 1);
1263
1264
1265 if (strncmp(s,"hd",2) == 0 && s[2] == '=') /* hd= is for hd.c */
1266 return 0; /* driver and not us */
1267
1268 if (strncmp(s,"ide",3) && strncmp(s,"idebus",6) && strncmp(s,"hd",2))
1269 return 0;
1270
1271 printk(KERN_INFO "ide_setup: %s", s);
1272 init_ide_data ();
1273
1274 #ifdef CONFIG_BLK_DEV_IDEDOUBLER
1275 if (!strcmp(s, "ide=doubler")) {
1276 extern int ide_doubler;
1277
1278 printk(" : Enabled support for IDE doublers\n");
1279 ide_doubler = 1;
1280 return 1;
1281 }
1282 #endif /* CONFIG_BLK_DEV_IDEDOUBLER */
1283
1284 if (!strcmp(s, "ide=nodma")) {
1285 printk(" : Prevented DMA\n");
1286 noautodma = 1;
1287 goto obsolete_option;
1288 }
1289
1290 #ifdef CONFIG_IDEPCI_PCIBUS_ORDER
1291 if (!strcmp(s, "ide=reverse")) {
1292 ide_scan_direction = 1;
1293 printk(" : Enabled support for IDE inverse scan order.\n");
1294 return 1;
1295 }
1296 #endif
1297
1298 #ifdef CONFIG_BLK_DEV_IDEACPI
1299 if (!strcmp(s, "ide=noacpi")) {
1300 //printk(" : Disable IDE ACPI support.\n");
1301 ide_noacpi = 1;
1302 return 1;
1303 }
1304 if (!strcmp(s, "ide=acpigtf")) {
1305 //printk(" : Enable IDE ACPI _GTF support.\n");
1306 ide_noacpitfs = 0;
1307 return 1;
1308 }
1309 if (!strcmp(s, "ide=acpionboot")) {
1310 //printk(" : Call IDE ACPI methods on boot.\n");
1311 ide_noacpionboot = 0;
1312 return 1;
1313 }
1314 #endif /* CONFIG_BLK_DEV_IDEACPI */
1315
1316 /*
1317 * Look for drive options: "hdx="
1318 */
1319 if (s[0] == 'h' && s[1] == 'd' && s[2] >= 'a' && s[2] <= max_drive) {
1320 const char *hd_words[] = {
1321 "none", "noprobe", "nowerr", "cdrom", "nodma",
1322 "autotune", "noautotune", "minus8", "swapdata", "bswap",
1323 "noflush", "remap", "remap63", "scsi", NULL };
1324 unit = s[2] - 'a';
1325 hw = unit / MAX_DRIVES;
1326 unit = unit % MAX_DRIVES;
1327 hwif = &ide_hwifs[hw];
1328 drive = &hwif->drives[unit];
1329 if (strncmp(s + 4, "ide-", 4) == 0) {
1330 strlcpy(drive->driver_req, s + 4, sizeof(drive->driver_req));
1331 goto done;
1332 }
1333 switch (match_parm(&s[3], hd_words, vals, 3)) {
1334 case -1: /* "none" */
1335 case -2: /* "noprobe" */
1336 drive->noprobe = 1;
1337 goto done;
1338 case -3: /* "nowerr" */
1339 drive->bad_wstat = BAD_R_STAT;
1340 hwif->noprobe = 0;
1341 goto done;
1342 case -4: /* "cdrom" */
1343 drive->present = 1;
1344 drive->media = ide_cdrom;
1345 /* an ATAPI device ignores DRDY */
1346 drive->ready_stat = 0;
1347 hwif->noprobe = 0;
1348 goto done;
1349 case -5: /* nodma */
1350 drive->nodma = 1;
1351 goto done;
1352 case -6: /* "autotune" */
1353 drive->autotune = IDE_TUNE_AUTO;
1354 goto obsolete_option;
1355 case -7: /* "noautotune" */
1356 drive->autotune = IDE_TUNE_NOAUTO;
1357 goto obsolete_option;
1358 case -9: /* "swapdata" */
1359 case -10: /* "bswap" */
1360 drive->bswap = 1;
1361 goto done;
1362 case -11: /* noflush */
1363 drive->noflush = 1;
1364 goto done;
1365 case -12: /* "remap" */
1366 drive->remap_0_to_1 = 1;
1367 goto done;
1368 case -13: /* "remap63" */
1369 drive->sect0 = 63;
1370 goto done;
1371 case -14: /* "scsi" */
1372 drive->scsi = 1;
1373 goto done;
1374 case 3: /* cyl,head,sect */
1375 drive->media = ide_disk;
1376 drive->ready_stat = READY_STAT;
1377 drive->cyl = drive->bios_cyl = vals[0];
1378 drive->head = drive->bios_head = vals[1];
1379 drive->sect = drive->bios_sect = vals[2];
1380 drive->present = 1;
1381 drive->forced_geom = 1;
1382 hwif->noprobe = 0;
1383 goto done;
1384 default:
1385 goto bad_option;
1386 }
1387 }
1388
1389 if (s[0] != 'i' || s[1] != 'd' || s[2] != 'e')
1390 goto bad_option;
1391 /*
1392 * Look for bus speed option: "idebus="
1393 */
1394 if (s[3] == 'b' && s[4] == 'u' && s[5] == 's') {
1395 if (match_parm(&s[6], NULL, vals, 1) != 1)
1396 goto bad_option;
1397 if (vals[0] >= 20 && vals[0] <= 66) {
1398 idebus_parameter = vals[0];
1399 } else
1400 printk(" -- BAD BUS SPEED! Expected value from 20 to 66");
1401 goto done;
1402 }
1403 /*
1404 * Look for interface options: "idex="
1405 */
1406 if (s[3] >= '0' && s[3] <= max_hwif) {
1407 /*
1408 * Be VERY CAREFUL changing this: note hardcoded indexes below
1409 * (-8, -9, -10) are reserved to ease the hardcoding.
1410 */
1411 static const char *ide_words[] = {
1412 "noprobe", "serialize", "minus3", "minus4",
1413 "reset", "minus6", "ata66", "minus8", "minus9",
1414 "minus10", "four", "qd65xx", "ht6560b", "cmd640_vlb",
1415 "dtc2278", "umc8672", "ali14xx", NULL };
1416
1417 hw_regs_t hwregs;
1418
1419 hw = s[3] - '0';
1420 hwif = &ide_hwifs[hw];
1421 i = match_parm(&s[4], ide_words, vals, 3);
1422
1423 /*
1424 * Cryptic check to ensure chipset not already set for hwif.
1425 * Note: we can't depend on hwif->chipset here.
1426 */
1427 if ((i >= -18 && i <= -11) || (i > 0 && i <= 3)) {
1428 /* chipset already specified */
1429 if (is_chipset_set[hw])
1430 goto bad_option;
1431 if (i > -18 && i <= -11) {
1432 /* these drivers are for "ide0=" only */
1433 if (hw != 0)
1434 goto bad_hwif;
1435 /* chipset already specified for 2nd port */
1436 if (is_chipset_set[hw+1])
1437 goto bad_option;
1438 }
1439 is_chipset_set[hw] = 1;
1440 printk("\n");
1441 }
1442
1443 switch (i) {
1444 #ifdef CONFIG_BLK_DEV_ALI14XX
1445 case -17: /* "ali14xx" */
1446 probe_ali14xx = 1;
1447 goto done;
1448 #endif
1449 #ifdef CONFIG_BLK_DEV_UMC8672
1450 case -16: /* "umc8672" */
1451 probe_umc8672 = 1;
1452 goto done;
1453 #endif
1454 #ifdef CONFIG_BLK_DEV_DTC2278
1455 case -15: /* "dtc2278" */
1456 probe_dtc2278 = 1;
1457 goto done;
1458 #endif
1459 #ifdef CONFIG_BLK_DEV_CMD640
1460 case -14: /* "cmd640_vlb" */
1461 {
1462 extern int cmd640_vlb; /* flag for cmd640.c */
1463 cmd640_vlb = 1;
1464 goto done;
1465 }
1466 #endif
1467 #ifdef CONFIG_BLK_DEV_HT6560B
1468 case -13: /* "ht6560b" */
1469 probe_ht6560b = 1;
1470 goto done;
1471 #endif
1472 #ifdef CONFIG_BLK_DEV_QD65XX
1473 case -12: /* "qd65xx" */
1474 probe_qd65xx = 1;
1475 goto done;
1476 #endif
1477 #ifdef CONFIG_BLK_DEV_4DRIVES
1478 case -11: /* "four" drives on one set of ports */
1479 {
1480 ide_hwif_t *mate = &ide_hwifs[hw^1];
1481 mate->drives[0].select.all ^= 0x20;
1482 mate->drives[1].select.all ^= 0x20;
1483 hwif->chipset = mate->chipset = ide_4drives;
1484 mate->irq = hwif->irq;
1485 memcpy(mate->io_ports, hwif->io_ports, sizeof(hwif->io_ports));
1486 hwif->mate = mate;
1487 mate->mate = hwif;
1488 hwif->serialized = mate->serialized = 1;
1489 goto obsolete_option;
1490 }
1491 #endif /* CONFIG_BLK_DEV_4DRIVES */
1492 case -10: /* minus10 */
1493 case -9: /* minus9 */
1494 case -8: /* minus8 */
1495 case -6:
1496 case -4:
1497 case -3:
1498 goto bad_option;
1499 case -7: /* ata66 */
1500 #ifdef CONFIG_BLK_DEV_IDEPCI
1501 /*
1502 * Use ATA_CBL_PATA40_SHORT so drive side
1503 * cable detection is also overriden.
1504 */
1505 hwif->cbl = ATA_CBL_PATA40_SHORT;
1506 goto obsolete_option;
1507 #else
1508 goto bad_hwif;
1509 #endif
1510 case -5: /* "reset" */
1511 hwif->reset = 1;
1512 goto obsolete_option;
1513 case -2: /* "serialize" */
1514 hwif->mate = &ide_hwifs[hw^1];
1515 hwif->mate->mate = hwif;
1516 hwif->serialized = hwif->mate->serialized = 1;
1517 goto obsolete_option;
1518
1519 case -1: /* "noprobe" */
1520 hwif->noprobe = 1;
1521 goto done;
1522
1523 case 1: /* base */
1524 vals[1] = vals[0] + 0x206; /* default ctl */
1525 case 2: /* base,ctl */
1526 vals[2] = 0; /* default irq = probe for it */
1527 case 3: /* base,ctl,irq */
1528 memset(&hwregs, 0, sizeof(hwregs));
1529 ide_init_hwif_ports(&hwregs, vals[0], vals[1], &hwif->irq);
1530 memcpy(hwif->io_ports, hwregs.io_ports, sizeof(hwif->io_ports));
1531 hwif->irq = vals[2];
1532 hwif->noprobe = 0;
1533 hwif->chipset = ide_forced;
1534 goto obsolete_option;
1535
1536 case 0: goto bad_option;
1537 default:
1538 printk(" -- SUPPORT NOT CONFIGURED IN THIS KERNEL\n");
1539 return 1;
1540 }
1541 }
1542 bad_option:
1543 printk(" -- BAD OPTION\n");
1544 return 1;
1545 obsolete_option:
1546 printk(" -- OBSOLETE OPTION, WILL BE REMOVED SOON!\n");
1547 return 1;
1548 bad_hwif:
1549 printk("-- NOT SUPPORTED ON ide%d", hw);
1550 done:
1551 printk("\n");
1552 return 1;
1553 }
1554
1555 extern void __init pnpide_init(void);
1556 extern void __exit pnpide_exit(void);
1557 extern void __init h8300_ide_init(void);
1558
1559 /*
1560 * probe_for_hwifs() finds/initializes "known" IDE interfaces
1561 */
1562 static void __init probe_for_hwifs (void)
1563 {
1564 #ifdef CONFIG_IDEPCI_PCIBUS_ORDER
1565 ide_scan_pcibus(ide_scan_direction);
1566 #endif
1567
1568 #ifdef CONFIG_ETRAX_IDE
1569 {
1570 extern void init_e100_ide(void);
1571 init_e100_ide();
1572 }
1573 #endif /* CONFIG_ETRAX_IDE */
1574 #ifdef CONFIG_BLK_DEV_CMD640
1575 {
1576 extern void ide_probe_for_cmd640x(void);
1577 ide_probe_for_cmd640x();
1578 }
1579 #endif /* CONFIG_BLK_DEV_CMD640 */
1580 #ifdef CONFIG_BLK_DEV_IDE_PMAC
1581 {
1582 extern int pmac_ide_probe(void);
1583 (void)pmac_ide_probe();
1584 }
1585 #endif /* CONFIG_BLK_DEV_IDE_PMAC */
1586 #ifdef CONFIG_BLK_DEV_GAYLE
1587 {
1588 extern void gayle_init(void);
1589 gayle_init();
1590 }
1591 #endif /* CONFIG_BLK_DEV_GAYLE */
1592 #ifdef CONFIG_BLK_DEV_FALCON_IDE
1593 {
1594 extern void falconide_init(void);
1595 falconide_init();
1596 }
1597 #endif /* CONFIG_BLK_DEV_FALCON_IDE */
1598 #ifdef CONFIG_BLK_DEV_MAC_IDE
1599 {
1600 extern void macide_init(void);
1601 macide_init();
1602 }
1603 #endif /* CONFIG_BLK_DEV_MAC_IDE */
1604 #ifdef CONFIG_BLK_DEV_Q40IDE
1605 {
1606 extern void q40ide_init(void);
1607 q40ide_init();
1608 }
1609 #endif /* CONFIG_BLK_DEV_Q40IDE */
1610 #ifdef CONFIG_BLK_DEV_BUDDHA
1611 {
1612 extern void buddha_init(void);
1613 buddha_init();
1614 }
1615 #endif /* CONFIG_BLK_DEV_BUDDHA */
1616 #ifdef CONFIG_BLK_DEV_IDEPNP
1617 pnpide_init();
1618 #endif
1619 #ifdef CONFIG_H8300
1620 h8300_ide_init();
1621 #endif
1622 }
1623
1624 /*
1625 * Probe module
1626 */
1627
1628 EXPORT_SYMBOL(ide_lock);
1629
1630 static int ide_bus_match(struct device *dev, struct device_driver *drv)
1631 {
1632 return 1;
1633 }
1634
1635 static char *media_string(ide_drive_t *drive)
1636 {
1637 switch (drive->media) {
1638 case ide_disk:
1639 return "disk";
1640 case ide_cdrom:
1641 return "cdrom";
1642 case ide_tape:
1643 return "tape";
1644 case ide_floppy:
1645 return "floppy";
1646 case ide_optical:
1647 return "optical";
1648 default:
1649 return "UNKNOWN";
1650 }
1651 }
1652
1653 static ssize_t media_show(struct device *dev, struct device_attribute *attr, char *buf)
1654 {
1655 ide_drive_t *drive = to_ide_device(dev);
1656 return sprintf(buf, "%s\n", media_string(drive));
1657 }
1658
1659 static ssize_t drivename_show(struct device *dev, struct device_attribute *attr, char *buf)
1660 {
1661 ide_drive_t *drive = to_ide_device(dev);
1662 return sprintf(buf, "%s\n", drive->name);
1663 }
1664
1665 static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf)
1666 {
1667 ide_drive_t *drive = to_ide_device(dev);
1668 return sprintf(buf, "ide:m-%s\n", media_string(drive));
1669 }
1670
1671 static ssize_t model_show(struct device *dev, struct device_attribute *attr,
1672 char *buf)
1673 {
1674 ide_drive_t *drive = to_ide_device(dev);
1675 return sprintf(buf, "%s\n", drive->id->model);
1676 }
1677
1678 static ssize_t firmware_show(struct device *dev, struct device_attribute *attr,
1679 char *buf)
1680 {
1681 ide_drive_t *drive = to_ide_device(dev);
1682 return sprintf(buf, "%s\n", drive->id->fw_rev);
1683 }
1684
1685 static ssize_t serial_show(struct device *dev, struct device_attribute *attr,
1686 char *buf)
1687 {
1688 ide_drive_t *drive = to_ide_device(dev);
1689 return sprintf(buf, "%s\n", drive->id->serial_no);
1690 }
1691
1692 static struct device_attribute ide_dev_attrs[] = {
1693 __ATTR_RO(media),
1694 __ATTR_RO(drivename),
1695 __ATTR_RO(modalias),
1696 __ATTR_RO(model),
1697 __ATTR_RO(firmware),
1698 __ATTR(serial, 0400, serial_show, NULL),
1699 __ATTR_NULL
1700 };
1701
1702 static int ide_uevent(struct device *dev, struct kobj_uevent_env *env)
1703 {
1704 ide_drive_t *drive = to_ide_device(dev);
1705
1706 add_uevent_var(env, "MEDIA=%s", media_string(drive));
1707 add_uevent_var(env, "DRIVENAME=%s", drive->name);
1708 add_uevent_var(env, "MODALIAS=ide:m-%s", media_string(drive));
1709 return 0;
1710 }
1711
1712 static int generic_ide_probe(struct device *dev)
1713 {
1714 ide_drive_t *drive = to_ide_device(dev);
1715 ide_driver_t *drv = to_ide_driver(dev->driver);
1716
1717 return drv->probe ? drv->probe(drive) : -ENODEV;
1718 }
1719
1720 static int generic_ide_remove(struct device *dev)
1721 {
1722 ide_drive_t *drive = to_ide_device(dev);
1723 ide_driver_t *drv = to_ide_driver(dev->driver);
1724
1725 if (drv->remove)
1726 drv->remove(drive);
1727
1728 return 0;
1729 }
1730
1731 static void generic_ide_shutdown(struct device *dev)
1732 {
1733 ide_drive_t *drive = to_ide_device(dev);
1734 ide_driver_t *drv = to_ide_driver(dev->driver);
1735
1736 if (dev->driver && drv->shutdown)
1737 drv->shutdown(drive);
1738 }
1739
1740 struct bus_type ide_bus_type = {
1741 .name = "ide",
1742 .match = ide_bus_match,
1743 .uevent = ide_uevent,
1744 .probe = generic_ide_probe,
1745 .remove = generic_ide_remove,
1746 .shutdown = generic_ide_shutdown,
1747 .dev_attrs = ide_dev_attrs,
1748 .suspend = generic_ide_suspend,
1749 .resume = generic_ide_resume,
1750 };
1751
1752 EXPORT_SYMBOL_GPL(ide_bus_type);
1753
1754 /*
1755 * This is gets invoked once during initialization, to set *everything* up
1756 */
1757 static int __init ide_init(void)
1758 {
1759 int ret;
1760
1761 printk(KERN_INFO "Uniform Multi-Platform E-IDE driver " REVISION "\n");
1762 system_bus_speed = ide_system_bus_speed();
1763
1764 ret = bus_register(&ide_bus_type);
1765 if (ret < 0) {
1766 printk(KERN_WARNING "IDE: bus_register error: %d\n", ret);
1767 return ret;
1768 }
1769
1770 init_ide_data();
1771
1772 proc_ide_create();
1773
1774 #ifdef CONFIG_IDE_ARM
1775 ide_arm_init();
1776 #endif
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 */
kernel source for telekom puls (alcatel/mediatek)