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