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[ARM] 4494/1: iop13xx: fix up elf_hwcap compile breakage
[linux-2.6/s3c2410-cpufreq.git] / drivers / ide / ide.c
blob5e88a060df06da4c22f7e399a35ee60e9ccae5a0
1 /*
2 * linux/drivers/ide/ide.c Version 7.00beta2 Mar 05 2003
3 *
4 * Copyright (C) 1994-1998 Linus Torvalds & authors (see below)
5 */
6
7 /*
8 * Mostly written by Mark Lord <mlord@pobox.com>
9 * and Gadi Oxman <gadio@netvision.net.il>
10 * and Andre Hedrick <andre@linux-ide.org>
11 *
12 * See linux/MAINTAINERS for address of current maintainer.
13 *
14 * This is the multiple IDE interface driver, as evolved from hd.c.
15 * It supports up to MAX_HWIFS IDE interfaces, on one or more IRQs
16 * (usually 14 & 15).
17 * There can be up to two drives per interface, as per the ATA-2 spec.
18 *
19 * ...
20 *
21 * From hd.c:
22 * |
23 * | It traverses the request-list, using interrupts to jump between functions.
24 * | As nearly all functions can be called within interrupts, we may not sleep.
25 * | Special care is recommended. Have Fun!
26 * |
27 * | modified by Drew Eckhardt to check nr of hd's from the CMOS.
28 * |
29 * | Thanks to Branko Lankester, lankeste@fwi.uva.nl, who found a bug
30 * | in the early extended-partition checks and added DM partitions.
31 * |
32 * | Early work on error handling by Mika Liljeberg (liljeber@cs.Helsinki.FI).
33 * |
34 * | IRQ-unmask, drive-id, multiple-mode, support for ">16 heads",
35 * | and general streamlining by Mark Lord (mlord@pobox.com).
36 *
37 * October, 1994 -- Complete line-by-line overhaul for linux 1.1.x, by:
38 *
39 * Mark Lord (mlord@pobox.com) (IDE Perf.Pkg)
40 * Delman Lee (delman@ieee.org) ("Mr. atdisk2")
41 * Scott Snyder (snyder@fnald0.fnal.gov) (ATAPI IDE cd-rom)
42 *
43 * This was a rewrite of just about everything from hd.c, though some original
44 * code is still sprinkled about. Think of it as a major evolution, with
45 * inspiration from lots of linux users, esp. hamish@zot.apana.org.au
46 */
47
48 #define REVISION "Revision: 7.00alpha2"
49 #define VERSION "Id: ide.c 7.00a2 20020906"
50
51 #define _IDE_C /* Tell ide.h it's really us */
52
53 #include <linux/module.h>
54 #include <linux/types.h>
55 #include <linux/string.h>
56 #include <linux/kernel.h>
57 #include <linux/timer.h>
58 #include <linux/mm.h>
59 #include <linux/interrupt.h>
60 #include <linux/major.h>
61 #include <linux/errno.h>
62 #include <linux/genhd.h>
63 #include <linux/blkpg.h>
64 #include <linux/slab.h>
65 #include <linux/init.h>
66 #include <linux/pci.h>
67 #include <linux/delay.h>
68 #include <linux/ide.h>
69 #include <linux/completion.h>
70 #include <linux/reboot.h>
71 #include <linux/cdrom.h>
72 #include <linux/seq_file.h>
73 #include <linux/device.h>
74 #include <linux/bitops.h>
75
76 #include <asm/byteorder.h>
77 #include <asm/irq.h>
78 #include <asm/uaccess.h>
79 #include <asm/io.h>
80
81
82 /* default maximum number of failures */
83 #define IDE_DEFAULT_MAX_FAILURES 1
84
85 static const u8 ide_hwif_to_major[] = { IDE0_MAJOR, IDE1_MAJOR,
86 IDE2_MAJOR, IDE3_MAJOR,
87 IDE4_MAJOR, IDE5_MAJOR,
88 IDE6_MAJOR, IDE7_MAJOR,
89 IDE8_MAJOR, IDE9_MAJOR };
90
91 static int idebus_parameter; /* holds the "idebus=" parameter */
92 static int system_bus_speed; /* holds what we think is VESA/PCI bus speed */
93
94 DEFINE_MUTEX(ide_cfg_mtx);
95 __cacheline_aligned_in_smp DEFINE_SPINLOCK(ide_lock);
96
97 #ifdef CONFIG_IDEPCI_PCIBUS_ORDER
98 static int ide_scan_direction; /* THIS was formerly 2.2.x pci=reverse */
99 #endif
100
101 int noautodma = 0;
102
103 EXPORT_SYMBOL(noautodma);
104
105 #ifdef CONFIG_BLK_DEV_IDEACPI
106 int ide_noacpi = 0;
107 int ide_noacpitfs = 1;
108 int ide_noacpionboot = 1;
109 #endif
110
111 /*
112 * This is declared extern in ide.h, for access by other IDE modules:
113 */
114 ide_hwif_t ide_hwifs[MAX_HWIFS]; /* master data repository */
115
116 EXPORT_SYMBOL(ide_hwifs);
117
118 /*
119 * Do not even *think* about calling this!
120 */
121 static void init_hwif_data(ide_hwif_t *hwif, unsigned int index)
122 {
123 unsigned int unit;
124
125 /* bulk initialize hwif & drive info with zeros */
126 memset(hwif, 0, sizeof(ide_hwif_t));
127
128 /* fill in any non-zero initial values */
129 hwif->index = index;
130 hwif->major = ide_hwif_to_major[index];
131
132 hwif->name[0] = 'i';
133 hwif->name[1] = 'd';
134 hwif->name[2] = 'e';
135 hwif->name[3] = '0' + index;
136
137 hwif->bus_state = BUSSTATE_ON;
138
139 hwif->atapi_dma = 0; /* disable all atapi dma */
140
141 init_completion(&hwif->gendev_rel_comp);
142
143 default_hwif_iops(hwif);
144 default_hwif_transport(hwif);
145 for (unit = 0; unit < MAX_DRIVES; ++unit) {
146 ide_drive_t *drive = &hwif->drives[unit];
147
148 drive->media = ide_disk;
149 drive->select.all = (unit<<4)|0xa0;
150 drive->hwif = hwif;
151 drive->ctl = 0x08;
152 drive->ready_stat = READY_STAT;
153 drive->bad_wstat = BAD_W_STAT;
154 drive->special.b.recalibrate = 1;
155 drive->special.b.set_geometry = 1;
156 drive->name[0] = 'h';
157 drive->name[1] = 'd';
158 drive->name[2] = 'a' + (index * MAX_DRIVES) + unit;
159 drive->max_failures = IDE_DEFAULT_MAX_FAILURES;
160 drive->using_dma = 0;
161 drive->vdma = 0;
162 INIT_LIST_HEAD(&drive->list);
163 init_completion(&drive->gendev_rel_comp);
164 }
165 }
166
167 static void init_hwif_default(ide_hwif_t *hwif, unsigned int index)
168 {
169 hw_regs_t hw;
170
171 memset(&hw, 0, sizeof(hw_regs_t));
172
173 ide_init_hwif_ports(&hw, ide_default_io_base(index), 0, &hwif->irq);
174
175 memcpy(&hwif->hw, &hw, sizeof(hw));
176 memcpy(hwif->io_ports, hw.io_ports, sizeof(hw.io_ports));
177
178 hwif->noprobe = !hwif->io_ports[IDE_DATA_OFFSET];
179 #ifdef CONFIG_BLK_DEV_HD
180 if (hwif->io_ports[IDE_DATA_OFFSET] == HD_DATA)
181 hwif->noprobe = 1; /* may be overridden by ide_setup() */
182 #endif
183 }
184
185 extern void ide_arm_init(void);
186
187 /*
188 * init_ide_data() sets reasonable default values into all fields
189 * of all instances of the hwifs and drives, but only on the first call.
190 * Subsequent calls have no effect (they don't wipe out anything).
191 *
192 * This routine is normally called at driver initialization time,
193 * but may also be called MUCH earlier during kernel "command-line"
194 * parameter processing. As such, we cannot depend on any other parts
195 * of the kernel (such as memory allocation) to be functioning yet.
196 *
197 * This is too bad, as otherwise we could dynamically allocate the
198 * ide_drive_t structs as needed, rather than always consuming memory
199 * for the max possible number (MAX_HWIFS * MAX_DRIVES) of them.
200 *
201 * FIXME: We should stuff the setup data into __init and copy the
202 * relevant hwifs/allocate them properly during boot.
203 */
204 #define MAGIC_COOKIE 0x12345678
205 static void __init init_ide_data (void)
206 {
207 ide_hwif_t *hwif;
208 unsigned int index;
209 static unsigned long magic_cookie = MAGIC_COOKIE;
210
211 if (magic_cookie != MAGIC_COOKIE)
212 return; /* already initialized */
213 magic_cookie = 0;
214
215 /* Initialise all interface structures */
216 for (index = 0; index < MAX_HWIFS; ++index) {
217 hwif = &ide_hwifs[index];
218 init_hwif_data(hwif, index);
219 init_hwif_default(hwif, index);
220 #if !defined(CONFIG_PPC32) || !defined(CONFIG_PCI)
221 hwif->irq = hwif->hw.irq =
222 ide_init_default_irq(hwif->io_ports[IDE_DATA_OFFSET]);
223 #endif
224 }
225 #ifdef CONFIG_IDE_ARM
226 ide_arm_init();
227 #endif
228 }
229
230 /**
231 * ide_system_bus_speed - guess bus speed
232 *
233 * ide_system_bus_speed() returns what we think is the system VESA/PCI
234 * bus speed (in MHz). This is used for calculating interface PIO timings.
235 * The default is 40 for known PCI systems, 50 otherwise.
236 * The "idebus=xx" parameter can be used to override this value.
237 * The actual value to be used is computed/displayed the first time
238 * through. Drivers should only use this as a last resort.
239 *
240 * Returns a guessed speed in MHz.
241 */
242
243 static int ide_system_bus_speed(void)
244 {
245 #ifdef CONFIG_PCI
246 static struct pci_device_id pci_default[] = {
247 { PCI_DEVICE(PCI_ANY_ID, PCI_ANY_ID) },
248 { }
249 };
250 #else
251 #define pci_default 0
252 #endif /* CONFIG_PCI */
253
254 if (!system_bus_speed) {
255 if (idebus_parameter) {
256 /* user supplied value */
257 system_bus_speed = idebus_parameter;
258 } else if (pci_dev_present(pci_default)) {
259 /* safe default value for PCI */
260 system_bus_speed = 33;
261 } else {
262 /* safe default value for VESA and PCI */
263 system_bus_speed = 50;
264 }
265 printk(KERN_INFO "ide: Assuming %dMHz system bus speed "
266 "for PIO modes%s\n", system_bus_speed,
267 idebus_parameter ? "" : "; override with idebus=xx");
268 }
269 return system_bus_speed;
270 }
271
272 static struct resource* hwif_request_region(ide_hwif_t *hwif,
273 unsigned long addr, int num)
274 {
275 struct resource *res = request_region(addr, num, hwif->name);
276
277 if (!res)
278 printk(KERN_ERR "%s: I/O resource 0x%lX-0x%lX not free.\n",
279 hwif->name, addr, addr+num-1);
280 return res;
281 }
282
283 /**
284 * ide_hwif_request_regions - request resources for IDE
285 * @hwif: interface to use
286 *
287 * Requests all the needed resources for an interface.
288 * Right now core IDE code does this work which is deeply wrong.
289 * MMIO leaves it to the controller driver,
290 * PIO will migrate this way over time.
291 */
292
293 int ide_hwif_request_regions(ide_hwif_t *hwif)
294 {
295 unsigned long addr;
296 unsigned int i;
297
298 if (hwif->mmio)
299 return 0;
300 addr = hwif->io_ports[IDE_CONTROL_OFFSET];
301 if (addr && !hwif_request_region(hwif, addr, 1))
302 goto control_region_busy;
303 hwif->straight8 = 0;
304 addr = hwif->io_ports[IDE_DATA_OFFSET];
305 if ((addr | 7) == hwif->io_ports[IDE_STATUS_OFFSET]) {
306 if (!hwif_request_region(hwif, addr, 8))
307 goto data_region_busy;
308 hwif->straight8 = 1;
309 return 0;
310 }
311 for (i = IDE_DATA_OFFSET; i <= IDE_STATUS_OFFSET; i++) {
312 addr = hwif->io_ports[i];
313 if (!hwif_request_region(hwif, addr, 1)) {
314 while (--i)
315 release_region(addr, 1);
316 goto data_region_busy;
317 }
318 }
319 return 0;
320
321 data_region_busy:
322 addr = hwif->io_ports[IDE_CONTROL_OFFSET];
323 if (addr)
324 release_region(addr, 1);
325 control_region_busy:
326 /* If any errors are return, we drop the hwif interface. */
327 return -EBUSY;
328 }
329
330 /**
331 * ide_hwif_release_regions - free IDE resources
332 *
333 * Note that we only release the standard ports,
334 * and do not even try to handle any extra ports
335 * allocated for weird IDE interface chipsets.
336 *
337 * Note also that we don't yet handle mmio resources here. More
338 * importantly our caller should be doing this so we need to
339 * restructure this as a helper function for drivers.
340 */
341
342 void ide_hwif_release_regions(ide_hwif_t *hwif)
343 {
344 u32 i = 0;
345
346 if (hwif->mmio)
347 return;
348 if (hwif->io_ports[IDE_CONTROL_OFFSET])
349 release_region(hwif->io_ports[IDE_CONTROL_OFFSET], 1);
350 if (hwif->straight8) {
351 release_region(hwif->io_ports[IDE_DATA_OFFSET], 8);
352 return;
353 }
354 for (i = IDE_DATA_OFFSET; i <= IDE_STATUS_OFFSET; i++)
355 if (hwif->io_ports[i])
356 release_region(hwif->io_ports[i], 1);
357 }
358
359 /**
360 * ide_hwif_restore - restore hwif to template
361 * @hwif: hwif to update
362 * @tmp_hwif: template
363 *
364 * Restore hwif to a previous state by copying most settings
365 * from the template.
366 */
367
368 static void ide_hwif_restore(ide_hwif_t *hwif, ide_hwif_t *tmp_hwif)
369 {
370 hwif->hwgroup = tmp_hwif->hwgroup;
371
372 hwif->gendev.parent = tmp_hwif->gendev.parent;
373
374 hwif->proc = tmp_hwif->proc;
375
376 hwif->major = tmp_hwif->major;
377 hwif->straight8 = tmp_hwif->straight8;
378 hwif->bus_state = tmp_hwif->bus_state;
379
380 hwif->host_flags = tmp_hwif->host_flags;
381
382 hwif->pio_mask = tmp_hwif->pio_mask;
383
384 hwif->atapi_dma = tmp_hwif->atapi_dma;
385 hwif->ultra_mask = tmp_hwif->ultra_mask;
386 hwif->mwdma_mask = tmp_hwif->mwdma_mask;
387 hwif->swdma_mask = tmp_hwif->swdma_mask;
388
389 hwif->cbl = tmp_hwif->cbl;
390
391 hwif->chipset = tmp_hwif->chipset;
392 hwif->hold = tmp_hwif->hold;
393
394 #ifdef CONFIG_BLK_DEV_IDEPCI
395 hwif->pci_dev = tmp_hwif->pci_dev;
396 hwif->cds = tmp_hwif->cds;
397 #endif
398
399 hwif->tuneproc = tmp_hwif->tuneproc;
400 hwif->speedproc = tmp_hwif->speedproc;
401 hwif->udma_filter = tmp_hwif->udma_filter;
402 hwif->selectproc = tmp_hwif->selectproc;
403 hwif->reset_poll = tmp_hwif->reset_poll;
404 hwif->pre_reset = tmp_hwif->pre_reset;
405 hwif->resetproc = tmp_hwif->resetproc;
406 hwif->intrproc = tmp_hwif->intrproc;
407 hwif->maskproc = tmp_hwif->maskproc;
408 hwif->quirkproc = tmp_hwif->quirkproc;
409 hwif->busproc = tmp_hwif->busproc;
410
411 hwif->ata_input_data = tmp_hwif->ata_input_data;
412 hwif->ata_output_data = tmp_hwif->ata_output_data;
413 hwif->atapi_input_bytes = tmp_hwif->atapi_input_bytes;
414 hwif->atapi_output_bytes = tmp_hwif->atapi_output_bytes;
415
416 hwif->dma_setup = tmp_hwif->dma_setup;
417 hwif->dma_exec_cmd = tmp_hwif->dma_exec_cmd;
418 hwif->dma_start = tmp_hwif->dma_start;
419 hwif->ide_dma_end = tmp_hwif->ide_dma_end;
420 hwif->ide_dma_check = tmp_hwif->ide_dma_check;
421 hwif->ide_dma_on = tmp_hwif->ide_dma_on;
422 hwif->dma_off_quietly = tmp_hwif->dma_off_quietly;
423 hwif->ide_dma_test_irq = tmp_hwif->ide_dma_test_irq;
424 hwif->ide_dma_clear_irq = tmp_hwif->ide_dma_clear_irq;
425 hwif->dma_host_on = tmp_hwif->dma_host_on;
426 hwif->dma_host_off = tmp_hwif->dma_host_off;
427 hwif->dma_lost_irq = tmp_hwif->dma_lost_irq;
428 hwif->dma_timeout = tmp_hwif->dma_timeout;
429
430 hwif->OUTB = tmp_hwif->OUTB;
431 hwif->OUTBSYNC = tmp_hwif->OUTBSYNC;
432 hwif->OUTW = tmp_hwif->OUTW;
433 hwif->OUTSW = tmp_hwif->OUTSW;
434 hwif->OUTSL = tmp_hwif->OUTSL;
435
436 hwif->INB = tmp_hwif->INB;
437 hwif->INW = tmp_hwif->INW;
438 hwif->INSW = tmp_hwif->INSW;
439 hwif->INSL = tmp_hwif->INSL;
440
441 hwif->sg_max_nents = tmp_hwif->sg_max_nents;
442
443 hwif->mmio = tmp_hwif->mmio;
444 hwif->rqsize = tmp_hwif->rqsize;
445 hwif->no_lba48 = tmp_hwif->no_lba48;
446
447 #ifndef CONFIG_BLK_DEV_IDECS
448 hwif->irq = tmp_hwif->irq;
449 #endif
450
451 hwif->dma_base = tmp_hwif->dma_base;
452 hwif->dma_master = tmp_hwif->dma_master;
453 hwif->dma_command = tmp_hwif->dma_command;
454 hwif->dma_vendor1 = tmp_hwif->dma_vendor1;
455 hwif->dma_status = tmp_hwif->dma_status;
456 hwif->dma_vendor3 = tmp_hwif->dma_vendor3;
457 hwif->dma_prdtable = tmp_hwif->dma_prdtable;
458
459 hwif->config_data = tmp_hwif->config_data;
460 hwif->select_data = tmp_hwif->select_data;
461 hwif->extra_base = tmp_hwif->extra_base;
462 hwif->extra_ports = tmp_hwif->extra_ports;
463 hwif->autodma = tmp_hwif->autodma;
464
465 hwif->hwif_data = tmp_hwif->hwif_data;
466 }
467
468 /**
469 * ide_unregister - free an IDE interface
470 * @index: index of interface (will change soon to a pointer)
471 *
472 * Perform the final unregister of an IDE interface. At the moment
473 * we don't refcount interfaces so this will also get split up.
474 *
475 * Locking:
476 * The caller must not hold the IDE locks
477 * The drive present/vanishing is not yet properly locked
478 * Take care with the callbacks. These have been split to avoid
479 * deadlocking the IDE layer. The shutdown callback is called
480 * before we take the lock and free resources. It is up to the
481 * caller to be sure there is no pending I/O here, and that
482 * the interface will not be reopened (present/vanishing locking
483 * isn't yet done BTW). After we commit to the final kill we
484 * call the cleanup callback with the ide locks held.
485 *
486 * Unregister restores the hwif structures to the default state.
487 * This is raving bonkers.
488 */
489
490 void ide_unregister(unsigned int index)
491 {
492 ide_drive_t *drive;
493 ide_hwif_t *hwif, *g;
494 static ide_hwif_t tmp_hwif; /* protected by ide_cfg_mtx */
495 ide_hwgroup_t *hwgroup;
496 int irq_count = 0, unit;
497
498 BUG_ON(index >= MAX_HWIFS);
499
500 BUG_ON(in_interrupt());
501 BUG_ON(irqs_disabled());
502 mutex_lock(&ide_cfg_mtx);
503 spin_lock_irq(&ide_lock);
504 hwif = &ide_hwifs[index];
505 if (!hwif->present)
506 goto abort;
507 for (unit = 0; unit < MAX_DRIVES; ++unit) {
508 drive = &hwif->drives[unit];
509 if (!drive->present)
510 continue;
511 spin_unlock_irq(&ide_lock);
512 device_unregister(&drive->gendev);
513 wait_for_completion(&drive->gendev_rel_comp);
514 spin_lock_irq(&ide_lock);
515 }
516 hwif->present = 0;
517
518 spin_unlock_irq(&ide_lock);
519
520 ide_proc_unregister_port(hwif);
521
522 hwgroup = hwif->hwgroup;
523 /*
524 * free the irq if we were the only hwif using it
525 */
526 g = hwgroup->hwif;
527 do {
528 if (g->irq == hwif->irq)
529 ++irq_count;
530 g = g->next;
531 } while (g != hwgroup->hwif);
532 if (irq_count == 1)
533 free_irq(hwif->irq, hwgroup);
534
535 spin_lock_irq(&ide_lock);
536 /*
537 * Note that we only release the standard ports,
538 * and do not even try to handle any extra ports
539 * allocated for weird IDE interface chipsets.
540 */
541 ide_hwif_release_regions(hwif);
542
543 /*
544 * Remove us from the hwgroup, and free
545 * the hwgroup if we were the only member
546 */
547 if (hwif->next == hwif) {
548 BUG_ON(hwgroup->hwif != hwif);
549 kfree(hwgroup);
550 } else {
551 /* There is another interface in hwgroup.
552 * Unlink us, and set hwgroup->drive and ->hwif to
553 * something sane.
554 */
555 g = hwgroup->hwif;
556 while (g->next != hwif)
557 g = g->next;
558 g->next = hwif->next;
559 if (hwgroup->hwif == hwif) {
560 /* Chose a random hwif for hwgroup->hwif.
561 * It's guaranteed that there are no drives
562 * left in the hwgroup.
563 */
564 BUG_ON(hwgroup->drive != NULL);
565 hwgroup->hwif = g;
566 }
567 BUG_ON(hwgroup->hwif == hwif);
568 }
569
570 /* More messed up locking ... */
571 spin_unlock_irq(&ide_lock);
572 device_unregister(&hwif->gendev);
573 wait_for_completion(&hwif->gendev_rel_comp);
574
575 /*
576 * Remove us from the kernel's knowledge
577 */
578 blk_unregister_region(MKDEV(hwif->major, 0), MAX_DRIVES<<PARTN_BITS);
579 kfree(hwif->sg_table);
580 unregister_blkdev(hwif->major, hwif->name);
581 spin_lock_irq(&ide_lock);
582
583 if (hwif->dma_base) {
584 (void) ide_release_dma(hwif);
585
586 hwif->dma_base = 0;
587 hwif->dma_master = 0;
588 hwif->dma_command = 0;
589 hwif->dma_vendor1 = 0;
590 hwif->dma_status = 0;
591 hwif->dma_vendor3 = 0;
592 hwif->dma_prdtable = 0;
593
594 hwif->extra_base = 0;
595 hwif->extra_ports = 0;
596 }
597
598 /* copy original settings */
599 tmp_hwif = *hwif;
600
601 /* restore hwif data to pristine status */
602 init_hwif_data(hwif, index);
603 init_hwif_default(hwif, index);
604
605 ide_hwif_restore(hwif, &tmp_hwif);
606
607 abort:
608 spin_unlock_irq(&ide_lock);
609 mutex_unlock(&ide_cfg_mtx);
610 }
611
612 EXPORT_SYMBOL(ide_unregister);
613
614
615 /**
616 * ide_setup_ports - set up IDE interface ports
617 * @hw: register descriptions
618 * @base: base register
619 * @offsets: table of register offsets
620 * @ctrl: control register
621 * @ack_irq: IRQ ack
622 * @irq: interrupt lie
623 *
624 * Setup hw_regs_t structure described by parameters. You
625 * may set up the hw structure yourself OR use this routine to
626 * do it for you. This is basically a helper
627 *
628 */
629
630 void ide_setup_ports ( hw_regs_t *hw,
631 unsigned long base, int *offsets,
632 unsigned long ctrl, unsigned long intr,
633 ide_ack_intr_t *ack_intr,
634 /*
635 * ide_io_ops_t *iops,
636 */
637 int irq)
638 {
639 int i;
640
641 memset(hw, 0, sizeof(hw_regs_t));
642 for (i = 0; i < IDE_NR_PORTS; i++) {
643 if (offsets[i] == -1) {
644 switch(i) {
645 case IDE_CONTROL_OFFSET:
646 hw->io_ports[i] = ctrl;
647 break;
648 #if defined(CONFIG_AMIGA) || defined(CONFIG_MAC)
649 case IDE_IRQ_OFFSET:
650 hw->io_ports[i] = intr;
651 break;
652 #endif /* (CONFIG_AMIGA) || (CONFIG_MAC) */
653 default:
654 hw->io_ports[i] = 0;
655 break;
656 }
657 } else {
658 hw->io_ports[i] = base + offsets[i];
659 }
660 }
661 hw->irq = irq;
662 hw->dma = NO_DMA;
663 hw->ack_intr = ack_intr;
664 /*
665 * hw->iops = iops;
666 */
667 }
668
669 /**
670 * ide_register_hw_with_fixup - register IDE interface
671 * @hw: hardware registers
672 * @initializing: set while initializing built-in drivers
673 * @hwifp: pointer to returned hwif
674 * @fixup: fixup function
675 *
676 * Register an IDE interface, specifying exactly the registers etc.
677 * Set init=1 iff calling before probes have taken place.
678 *
679 * Returns -1 on error.
680 */
681
682 int ide_register_hw_with_fixup(hw_regs_t *hw, int initializing,
683 ide_hwif_t **hwifp,
684 void(*fixup)(ide_hwif_t *hwif))
685 {
686 int index, retry = 1;
687 ide_hwif_t *hwif;
688
689 do {
690 for (index = 0; index < MAX_HWIFS; ++index) {
691 hwif = &ide_hwifs[index];
692 if (hwif->hw.io_ports[IDE_DATA_OFFSET] == hw->io_ports[IDE_DATA_OFFSET])
693 goto found;
694 }
695 for (index = 0; index < MAX_HWIFS; ++index) {
696 hwif = &ide_hwifs[index];
697 if (hwif->hold)
698 continue;
699 if ((!hwif->present && !hwif->mate && !initializing) ||
700 (!hwif->hw.io_ports[IDE_DATA_OFFSET] && initializing))
701 goto found;
702 }
703 for (index = 0; index < MAX_HWIFS; index++)
704 ide_unregister(index);
705 } while (retry--);
706 return -1;
707 found:
708 if (hwif->present)
709 ide_unregister(index);
710 else if (!hwif->hold) {
711 init_hwif_data(hwif, index);
712 init_hwif_default(hwif, index);
713 }
714 if (hwif->present)
715 return -1;
716 memcpy(&hwif->hw, hw, sizeof(*hw));
717 memcpy(hwif->io_ports, hwif->hw.io_ports, sizeof(hwif->hw.io_ports));
718 hwif->irq = hw->irq;
719 hwif->noprobe = 0;
720 hwif->chipset = hw->chipset;
721 hwif->gendev.parent = hw->dev;
722
723 if (!initializing) {
724 probe_hwif_init_with_fixup(hwif, fixup);
725 ide_proc_register_port(hwif);
726 }
727
728 if (hwifp)
729 *hwifp = hwif;
730
731 return (initializing || hwif->present) ? index : -1;
732 }
733
734 EXPORT_SYMBOL(ide_register_hw_with_fixup);
735
736 int ide_register_hw(hw_regs_t *hw, int initializing, ide_hwif_t **hwifp)
737 {
738 return ide_register_hw_with_fixup(hw, initializing, hwifp, NULL);
739 }
740
741 EXPORT_SYMBOL(ide_register_hw);
742
743 /*
744 * Locks for IDE setting functionality
745 */
746
747 DEFINE_MUTEX(ide_setting_mtx);
748
749 EXPORT_SYMBOL_GPL(ide_setting_mtx);
750
751 /**
752 * ide_spin_wait_hwgroup - wait for group
753 * @drive: drive in the group
754 *
755 * Wait for an IDE device group to go non busy and then return
756 * holding the ide_lock which guards the hwgroup->busy status
757 * and right to use it.
758 */
759
760 int ide_spin_wait_hwgroup (ide_drive_t *drive)
761 {
762 ide_hwgroup_t *hwgroup = HWGROUP(drive);
763 unsigned long timeout = jiffies + (3 * HZ);
764
765 spin_lock_irq(&ide_lock);
766
767 while (hwgroup->busy) {
768 unsigned long lflags;
769 spin_unlock_irq(&ide_lock);
770 local_irq_set(lflags);
771 if (time_after(jiffies, timeout)) {
772 local_irq_restore(lflags);
773 printk(KERN_ERR "%s: channel busy\n", drive->name);
774 return -EBUSY;
775 }
776 local_irq_restore(lflags);
777 spin_lock_irq(&ide_lock);
778 }
779 return 0;
780 }
781
782 EXPORT_SYMBOL(ide_spin_wait_hwgroup);
783
784 int set_io_32bit(ide_drive_t *drive, int arg)
785 {
786 if (drive->no_io_32bit)
787 return -EPERM;
788
789 if (arg < 0 || arg > 1 + (SUPPORT_VLB_SYNC << 1))
790 return -EINVAL;
791
792 drive->io_32bit = arg;
793 #ifdef CONFIG_BLK_DEV_DTC2278
794 if (HWIF(drive)->chipset == ide_dtc2278)
795 HWIF(drive)->drives[!drive->select.b.unit].io_32bit = arg;
796 #endif /* CONFIG_BLK_DEV_DTC2278 */
797 return 0;
798 }
799
800 static int set_ksettings(ide_drive_t *drive, int arg)
801 {
802 if (arg < 0 || arg > 1)
803 return -EINVAL;
804
805 if (ide_spin_wait_hwgroup(drive))
806 return -EBUSY;
807 drive->keep_settings = arg;
808 spin_unlock_irq(&ide_lock);
809
810 return 0;
811 }
812
813 int set_using_dma(ide_drive_t *drive, int arg)
814 {
815 #ifdef CONFIG_BLK_DEV_IDEDMA
816 ide_hwif_t *hwif = drive->hwif;
817 int err = -EPERM;
818
819 if (arg < 0 || arg > 1)
820 return -EINVAL;
821
822 if (!drive->id || !(drive->id->capability & 1))
823 goto out;
824
825 if (hwif->ide_dma_check == NULL)
826 goto out;
827
828 err = -EBUSY;
829 if (ide_spin_wait_hwgroup(drive))
830 goto out;
831 /*
832 * set ->busy flag, unlock and let it ride
833 */
834 hwif->hwgroup->busy = 1;
835 spin_unlock_irq(&ide_lock);
836
837 err = 0;
838
839 if (arg) {
840 hwif->dma_off_quietly(drive);
841 if (ide_set_dma(drive) || hwif->ide_dma_on(drive))
842 err = -EIO;
843 } else
844 ide_dma_off(drive);
845
846 /*
847 * lock, clear ->busy flag and unlock before leaving
848 */
849 spin_lock_irq(&ide_lock);
850 hwif->hwgroup->busy = 0;
851 spin_unlock_irq(&ide_lock);
852 out:
853 return err;
854 #else
855 if (arg < 0 || arg > 1)
856 return -EINVAL;
857
858 return -EPERM;
859 #endif
860 }
861
862 int set_pio_mode(ide_drive_t *drive, int arg)
863 {
864 struct request rq;
865
866 if (arg < 0 || arg > 255)
867 return -EINVAL;
868
869 if (!HWIF(drive)->tuneproc)
870 return -ENOSYS;
871 if (drive->special.b.set_tune)
872 return -EBUSY;
873 ide_init_drive_cmd(&rq);
874 drive->tune_req = (u8) arg;
875 drive->special.b.set_tune = 1;
876 (void) ide_do_drive_cmd(drive, &rq, ide_wait);
877 return 0;
878 }
879
880 static int set_unmaskirq(ide_drive_t *drive, int arg)
881 {
882 if (drive->no_unmask)
883 return -EPERM;
884
885 if (arg < 0 || arg > 1)
886 return -EINVAL;
887
888 if (ide_spin_wait_hwgroup(drive))
889 return -EBUSY;
890 drive->unmask = arg;
891 spin_unlock_irq(&ide_lock);
892
893 return 0;
894 }
895
896 /**
897 * system_bus_clock - clock guess
898 *
899 * External version of the bus clock guess used by very old IDE drivers
900 * for things like VLB timings. Should not be used.
901 */
902
903 int system_bus_clock (void)
904 {
905 return((int) ((!system_bus_speed) ? ide_system_bus_speed() : system_bus_speed ));
906 }
907
908 EXPORT_SYMBOL(system_bus_clock);
909
910 static int generic_ide_suspend(struct device *dev, pm_message_t mesg)
911 {
912 ide_drive_t *drive = dev->driver_data;
913 ide_hwif_t *hwif = HWIF(drive);
914 struct request rq;
915 struct request_pm_state rqpm;
916 ide_task_t args;
917
918 /* Call ACPI _GTM only once */
919 if (!(drive->dn % 2))
920 ide_acpi_get_timing(hwif);
921
922 memset(&rq, 0, sizeof(rq));
923 memset(&rqpm, 0, sizeof(rqpm));
924 memset(&args, 0, sizeof(args));
925 rq.cmd_type = REQ_TYPE_PM_SUSPEND;
926 rq.special = &args;
927 rq.data = &rqpm;
928 rqpm.pm_step = ide_pm_state_start_suspend;
929 if (mesg.event == PM_EVENT_PRETHAW)
930 mesg.event = PM_EVENT_FREEZE;
931 rqpm.pm_state = mesg.event;
932
933 return ide_do_drive_cmd(drive, &rq, ide_wait);
934 }
935
936 static int generic_ide_resume(struct device *dev)
937 {
938 ide_drive_t *drive = dev->driver_data;
939 ide_hwif_t *hwif = HWIF(drive);
940 struct request rq;
941 struct request_pm_state rqpm;
942 ide_task_t args;
943 int err;
944
945 /* Call ACPI _STM only once */
946 if (!(drive->dn % 2))
947 ide_acpi_push_timing(hwif);
948
949 ide_acpi_exec_tfs(drive);
950
951 memset(&rq, 0, sizeof(rq));
952 memset(&rqpm, 0, sizeof(rqpm));
953 memset(&args, 0, sizeof(args));
954 rq.cmd_type = REQ_TYPE_PM_RESUME;
955 rq.special = &args;
956 rq.data = &rqpm;
957 rqpm.pm_step = ide_pm_state_start_resume;
958 rqpm.pm_state = PM_EVENT_ON;
959
960 err = ide_do_drive_cmd(drive, &rq, ide_head_wait);
961
962 if (err == 0 && dev->driver) {
963 ide_driver_t *drv = to_ide_driver(dev->driver);
964
965 if (drv->resume)
966 drv->resume(drive);
967 }
968
969 return err;
970 }
971
972 int generic_ide_ioctl(ide_drive_t *drive, struct file *file, struct block_device *bdev,
973 unsigned int cmd, unsigned long arg)
974 {
975 unsigned long flags;
976 ide_driver_t *drv;
977 void __user *p = (void __user *)arg;
978 int err = 0, (*setfunc)(ide_drive_t *, int);
979 u8 *val;
980
981 switch (cmd) {
982 case HDIO_GET_32BIT: val = &drive->io_32bit; goto read_val;
983 case HDIO_GET_KEEPSETTINGS: val = &drive->keep_settings; goto read_val;
984 case HDIO_GET_UNMASKINTR: val = &drive->unmask; goto read_val;
985 case HDIO_GET_DMA: val = &drive->using_dma; goto read_val;
986 case HDIO_SET_32BIT: setfunc = set_io_32bit; goto set_val;
987 case HDIO_SET_KEEPSETTINGS: setfunc = set_ksettings; goto set_val;
988 case HDIO_SET_PIO_MODE: setfunc = set_pio_mode; goto set_val;
989 case HDIO_SET_UNMASKINTR: setfunc = set_unmaskirq; goto set_val;
990 case HDIO_SET_DMA: setfunc = set_using_dma; goto set_val;
991 }
992
993 switch (cmd) {
994 case HDIO_OBSOLETE_IDENTITY:
995 case HDIO_GET_IDENTITY:
996 if (bdev != bdev->bd_contains)
997 return -EINVAL;
998 if (drive->id_read == 0)
999 return -ENOMSG;
1000 if (copy_to_user(p, drive->id, (cmd == HDIO_GET_IDENTITY) ? sizeof(*drive->id) : 142))
1001 return -EFAULT;
1002 return 0;
1003
1004 case HDIO_GET_NICE:
1005 return put_user(drive->dsc_overlap << IDE_NICE_DSC_OVERLAP |
1006 drive->atapi_overlap << IDE_NICE_ATAPI_OVERLAP |
1007 drive->nice0 << IDE_NICE_0 |
1008 drive->nice1 << IDE_NICE_1 |
1009 drive->nice2 << IDE_NICE_2,
1010 (long __user *) arg);
1011
1012 #ifdef CONFIG_IDE_TASK_IOCTL
1013 case HDIO_DRIVE_TASKFILE:
1014 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
1015 return -EACCES;
1016 switch(drive->media) {
1017 case ide_disk:
1018 return ide_taskfile_ioctl(drive, cmd, arg);
1019 default:
1020 return -ENOMSG;
1021 }
1022 #endif /* CONFIG_IDE_TASK_IOCTL */
1023
1024 case HDIO_DRIVE_CMD:
1025 if (!capable(CAP_SYS_RAWIO))
1026 return -EACCES;
1027 return ide_cmd_ioctl(drive, cmd, arg);
1028
1029 case HDIO_DRIVE_TASK:
1030 if (!capable(CAP_SYS_RAWIO))
1031 return -EACCES;
1032 return ide_task_ioctl(drive, cmd, arg);
1033
1034 case HDIO_SCAN_HWIF:
1035 {
1036 hw_regs_t hw;
1037 int args[3];
1038 if (!capable(CAP_SYS_RAWIO)) return -EACCES;
1039 if (copy_from_user(args, p, 3 * sizeof(int)))
1040 return -EFAULT;
1041 memset(&hw, 0, sizeof(hw));
1042 ide_init_hwif_ports(&hw, (unsigned long) args[0],
1043 (unsigned long) args[1], NULL);
1044 hw.irq = args[2];
1045 if (ide_register_hw(&hw, 0, NULL) == -1)
1046 return -EIO;
1047 return 0;
1048 }
1049 case HDIO_UNREGISTER_HWIF:
1050 if (!capable(CAP_SYS_RAWIO)) return -EACCES;
1051 /* (arg > MAX_HWIFS) checked in function */
1052 ide_unregister(arg);
1053 return 0;
1054 case HDIO_SET_NICE:
1055 if (!capable(CAP_SYS_ADMIN)) return -EACCES;
1056 if (arg != (arg & ((1 << IDE_NICE_DSC_OVERLAP) | (1 << IDE_NICE_1))))
1057 return -EPERM;
1058 drive->dsc_overlap = (arg >> IDE_NICE_DSC_OVERLAP) & 1;
1059 drv = *(ide_driver_t **)bdev->bd_disk->private_data;
1060 if (drive->dsc_overlap && !drv->supports_dsc_overlap) {
1061 drive->dsc_overlap = 0;
1062 return -EPERM;
1063 }
1064 drive->nice1 = (arg >> IDE_NICE_1) & 1;
1065 return 0;
1066 case HDIO_DRIVE_RESET:
1067 {
1068 unsigned long flags;
1069 if (!capable(CAP_SYS_ADMIN)) return -EACCES;
1070
1071 /*
1072 * Abort the current command on the
1073 * group if there is one, taking
1074 * care not to allow anything else
1075 * to be queued and to die on the
1076 * spot if we miss one somehow
1077 */
1078
1079 spin_lock_irqsave(&ide_lock, flags);
1080
1081 if (HWGROUP(drive)->resetting) {
1082 spin_unlock_irqrestore(&ide_lock, flags);
1083 return -EBUSY;
1084 }
1085
1086 ide_abort(drive, "drive reset");
1087
1088 BUG_ON(HWGROUP(drive)->handler);
1089
1090 /* Ensure nothing gets queued after we
1091 drop the lock. Reset will clear the busy */
1092
1093 HWGROUP(drive)->busy = 1;
1094 spin_unlock_irqrestore(&ide_lock, flags);
1095 (void) ide_do_reset(drive);
1096
1097 return 0;
1098 }
1099
1100 case HDIO_GET_BUSSTATE:
1101 if (!capable(CAP_SYS_ADMIN))
1102 return -EACCES;
1103 if (put_user(HWIF(drive)->bus_state, (long __user *)arg))
1104 return -EFAULT;
1105 return 0;
1106
1107 case HDIO_SET_BUSSTATE:
1108 if (!capable(CAP_SYS_ADMIN))
1109 return -EACCES;
1110 if (HWIF(drive)->busproc)
1111 return HWIF(drive)->busproc(drive, (int)arg);
1112 return -EOPNOTSUPP;
1113 default:
1114 return -EINVAL;
1115 }
1116
1117 read_val:
1118 mutex_lock(&ide_setting_mtx);
1119 spin_lock_irqsave(&ide_lock, flags);
1120 err = *val;
1121 spin_unlock_irqrestore(&ide_lock, flags);
1122 mutex_unlock(&ide_setting_mtx);
1123 return err >= 0 ? put_user(err, (long __user *)arg) : err;
1124
1125 set_val:
1126 if (bdev != bdev->bd_contains)
1127 err = -EINVAL;
1128 else {
1129 if (!capable(CAP_SYS_ADMIN))
1130 err = -EACCES;
1131 else {
1132 mutex_lock(&ide_setting_mtx);
1133 err = setfunc(drive, arg);
1134 mutex_unlock(&ide_setting_mtx);
1135 }
1136 }
1137 return err;
1138 }
1139
1140 EXPORT_SYMBOL(generic_ide_ioctl);
1141
1142 /*
1143 * stridx() returns the offset of c within s,
1144 * or -1 if c is '\0' or not found within s.
1145 */
1146 static int __init stridx (const char *s, char c)
1147 {
1148 char *i = strchr(s, c);
1149 return (i && c) ? i - s : -1;
1150 }
1151
1152 /*
1153 * match_parm() does parsing for ide_setup():
1154 *
1155 * 1. the first char of s must be '='.
1156 * 2. if the remainder matches one of the supplied keywords,
1157 * the index (1 based) of the keyword is negated and returned.
1158 * 3. if the remainder is a series of no more than max_vals numbers
1159 * separated by commas, the numbers are saved in vals[] and a
1160 * count of how many were saved is returned. Base10 is assumed,
1161 * and base16 is allowed when prefixed with "0x".
1162 * 4. otherwise, zero is returned.
1163 */
1164 static int __init match_parm (char *s, const char *keywords[], int vals[], int max_vals)
1165 {
1166 static const char *decimal = "0123456789";
1167 static const char *hex = "0123456789abcdef";
1168 int i, n;
1169
1170 if (*s++ == '=') {
1171 /*
1172 * Try matching against the supplied keywords,
1173 * and return -(index+1) if we match one
1174 */
1175 if (keywords != NULL) {
1176 for (i = 0; *keywords != NULL; ++i) {
1177 if (!strcmp(s, *keywords++))
1178 return -(i+1);
1179 }
1180 }
1181 /*
1182 * Look for a series of no more than "max_vals"
1183 * numeric values separated by commas, in base10,
1184 * or base16 when prefixed with "0x".
1185 * Return a count of how many were found.
1186 */
1187 for (n = 0; (i = stridx(decimal, *s)) >= 0;) {
1188 vals[n] = i;
1189 while ((i = stridx(decimal, *++s)) >= 0)
1190 vals[n] = (vals[n] * 10) + i;
1191 if (*s == 'x' && !vals[n]) {
1192 while ((i = stridx(hex, *++s)) >= 0)
1193 vals[n] = (vals[n] * 0x10) + i;
1194 }
1195 if (++n == max_vals)
1196 break;
1197 if (*s == ',' || *s == ';')
1198 ++s;
1199 }
1200 if (!*s)
1201 return n;
1202 }
1203 return 0; /* zero = nothing matched */
1204 }
1205
1206 #ifdef CONFIG_BLK_DEV_ALI14XX
1207 extern int probe_ali14xx;
1208 extern int ali14xx_init(void);
1209 #endif
1210 #ifdef CONFIG_BLK_DEV_UMC8672
1211 extern int probe_umc8672;
1212 extern int umc8672_init(void);
1213 #endif
1214 #ifdef CONFIG_BLK_DEV_DTC2278
1215 extern int probe_dtc2278;
1216 extern int dtc2278_init(void);
1217 #endif
1218 #ifdef CONFIG_BLK_DEV_HT6560B
1219 extern int probe_ht6560b;
1220 extern int ht6560b_init(void);
1221 #endif
1222 #ifdef CONFIG_BLK_DEV_QD65XX
1223 extern int probe_qd65xx;
1224 extern int qd65xx_init(void);
1225 #endif
1226
1227 static int __initdata is_chipset_set[MAX_HWIFS];
1228
1229 /*
1230 * ide_setup() gets called VERY EARLY during initialization,
1231 * to handle kernel "command line" strings beginning with "hdx=" or "ide".
1232 *
1233 * Remember to update Documentation/ide.txt if you change something here.
1234 */
1235 static int __init ide_setup(char *s)
1236 {
1237 int i, vals[3];
1238 ide_hwif_t *hwif;
1239 ide_drive_t *drive;
1240 unsigned int hw, unit;
1241 const char max_drive = 'a' + ((MAX_HWIFS * MAX_DRIVES) - 1);
1242 const char max_hwif = '0' + (MAX_HWIFS - 1);
1243
1244
1245 if (strncmp(s,"hd",2) == 0 && s[2] == '=') /* hd= is for hd.c */
1246 return 0; /* driver and not us */
1247
1248 if (strncmp(s,"ide",3) && strncmp(s,"idebus",6) && strncmp(s,"hd",2))
1249 return 0;
1250
1251 printk(KERN_INFO "ide_setup: %s", s);
1252 init_ide_data ();
1253
1254 #ifdef CONFIG_BLK_DEV_IDEDOUBLER
1255 if (!strcmp(s, "ide=doubler")) {
1256 extern int ide_doubler;
1257
1258 printk(" : Enabled support for IDE doublers\n");
1259 ide_doubler = 1;
1260 return 1;
1261 }
1262 #endif /* CONFIG_BLK_DEV_IDEDOUBLER */
1263
1264 if (!strcmp(s, "ide=nodma")) {
1265 printk(" : Prevented DMA\n");
1266 noautodma = 1;
1267 return 1;
1268 }
1269
1270 #ifdef CONFIG_IDEPCI_PCIBUS_ORDER
1271 if (!strcmp(s, "ide=reverse")) {
1272 ide_scan_direction = 1;
1273 printk(" : Enabled support for IDE inverse scan order.\n");
1274 return 1;
1275 }
1276 #endif
1277
1278 #ifdef CONFIG_BLK_DEV_IDEACPI
1279 if (!strcmp(s, "ide=noacpi")) {
1280 //printk(" : Disable IDE ACPI support.\n");
1281 ide_noacpi = 1;
1282 return 1;
1283 }
1284 if (!strcmp(s, "ide=acpigtf")) {
1285 //printk(" : Enable IDE ACPI _GTF support.\n");
1286 ide_noacpitfs = 0;
1287 return 1;
1288 }
1289 if (!strcmp(s, "ide=acpionboot")) {
1290 //printk(" : Call IDE ACPI methods on boot.\n");
1291 ide_noacpionboot = 0;
1292 return 1;
1293 }
1294 #endif /* CONFIG_BLK_DEV_IDEACPI */
1295
1296 /*
1297 * Look for drive options: "hdx="
1298 */
1299 if (s[0] == 'h' && s[1] == 'd' && s[2] >= 'a' && s[2] <= max_drive) {
1300 const char *hd_words[] = {
1301 "none", "noprobe", "nowerr", "cdrom", "minus5",
1302 "autotune", "noautotune", "minus8", "swapdata", "bswap",
1303 "noflush", "remap", "remap63", "scsi", NULL };
1304 unit = s[2] - 'a';
1305 hw = unit / MAX_DRIVES;
1306 unit = unit % MAX_DRIVES;
1307 hwif = &ide_hwifs[hw];
1308 drive = &hwif->drives[unit];
1309 if (strncmp(s + 4, "ide-", 4) == 0) {
1310 strlcpy(drive->driver_req, s + 4, sizeof(drive->driver_req));
1311 goto done;
1312 }
1313 switch (match_parm(&s[3], hd_words, vals, 3)) {
1314 case -1: /* "none" */
1315 case -2: /* "noprobe" */
1316 drive->noprobe = 1;
1317 goto done;
1318 case -3: /* "nowerr" */
1319 drive->bad_wstat = BAD_R_STAT;
1320 hwif->noprobe = 0;
1321 goto done;
1322 case -4: /* "cdrom" */
1323 drive->present = 1;
1324 drive->media = ide_cdrom;
1325 /* an ATAPI device ignores DRDY */
1326 drive->ready_stat = 0;
1327 hwif->noprobe = 0;
1328 goto done;
1329 case -6: /* "autotune" */
1330 drive->autotune = IDE_TUNE_AUTO;
1331 goto obsolete_option;
1332 case -7: /* "noautotune" */
1333 drive->autotune = IDE_TUNE_NOAUTO;
1334 goto obsolete_option;
1335 case -9: /* "swapdata" */
1336 case -10: /* "bswap" */
1337 drive->bswap = 1;
1338 goto done;
1339 case -11: /* noflush */
1340 drive->noflush = 1;
1341 goto done;
1342 case -12: /* "remap" */
1343 drive->remap_0_to_1 = 1;
1344 goto done;
1345 case -13: /* "remap63" */
1346 drive->sect0 = 63;
1347 goto done;
1348 case -14: /* "scsi" */
1349 drive->scsi = 1;
1350 goto done;
1351 case 3: /* cyl,head,sect */
1352 drive->media = ide_disk;
1353 drive->ready_stat = READY_STAT;
1354 drive->cyl = drive->bios_cyl = vals[0];
1355 drive->head = drive->bios_head = vals[1];
1356 drive->sect = drive->bios_sect = vals[2];
1357 drive->present = 1;
1358 drive->forced_geom = 1;
1359 hwif->noprobe = 0;
1360 goto done;
1361 default:
1362 goto bad_option;
1363 }
1364 }
1365
1366 if (s[0] != 'i' || s[1] != 'd' || s[2] != 'e')
1367 goto bad_option;
1368 /*
1369 * Look for bus speed option: "idebus="
1370 */
1371 if (s[3] == 'b' && s[4] == 'u' && s[5] == 's') {
1372 if (match_parm(&s[6], NULL, vals, 1) != 1)
1373 goto bad_option;
1374 if (vals[0] >= 20 && vals[0] <= 66) {
1375 idebus_parameter = vals[0];
1376 } else
1377 printk(" -- BAD BUS SPEED! Expected value from 20 to 66");
1378 goto done;
1379 }
1380 /*
1381 * Look for interface options: "idex="
1382 */
1383 if (s[3] >= '0' && s[3] <= max_hwif) {
1384 /*
1385 * Be VERY CAREFUL changing this: note hardcoded indexes below
1386 * (-8, -9, -10) are reserved to ease the hardcoding.
1387 */
1388 static const char *ide_words[] = {
1389 "noprobe", "serialize", "minus3", "minus4",
1390 "reset", "dma", "ata66", "minus8", "minus9",
1391 "minus10", "four", "qd65xx", "ht6560b", "cmd640_vlb",
1392 "dtc2278", "umc8672", "ali14xx", NULL };
1393 hw = s[3] - '0';
1394 hwif = &ide_hwifs[hw];
1395 i = match_parm(&s[4], ide_words, vals, 3);
1396
1397 /*
1398 * Cryptic check to ensure chipset not already set for hwif.
1399 * Note: we can't depend on hwif->chipset here.
1400 */
1401 if ((i >= -18 && i <= -11) || (i > 0 && i <= 3)) {
1402 /* chipset already specified */
1403 if (is_chipset_set[hw])
1404 goto bad_option;
1405 if (i > -18 && i <= -11) {
1406 /* these drivers are for "ide0=" only */
1407 if (hw != 0)
1408 goto bad_hwif;
1409 /* chipset already specified for 2nd port */
1410 if (is_chipset_set[hw+1])
1411 goto bad_option;
1412 }
1413 is_chipset_set[hw] = 1;
1414 printk("\n");
1415 }
1416
1417 switch (i) {
1418 #ifdef CONFIG_BLK_DEV_ALI14XX
1419 case -17: /* "ali14xx" */
1420 probe_ali14xx = 1;
1421 goto done;
1422 #endif
1423 #ifdef CONFIG_BLK_DEV_UMC8672
1424 case -16: /* "umc8672" */
1425 probe_umc8672 = 1;
1426 goto done;
1427 #endif
1428 #ifdef CONFIG_BLK_DEV_DTC2278
1429 case -15: /* "dtc2278" */
1430 probe_dtc2278 = 1;
1431 goto done;
1432 #endif
1433 #ifdef CONFIG_BLK_DEV_CMD640
1434 case -14: /* "cmd640_vlb" */
1435 {
1436 extern int cmd640_vlb; /* flag for cmd640.c */
1437 cmd640_vlb = 1;
1438 goto done;
1439 }
1440 #endif
1441 #ifdef CONFIG_BLK_DEV_HT6560B
1442 case -13: /* "ht6560b" */
1443 probe_ht6560b = 1;
1444 goto done;
1445 #endif
1446 #ifdef CONFIG_BLK_DEV_QD65XX
1447 case -12: /* "qd65xx" */
1448 probe_qd65xx = 1;
1449 goto done;
1450 #endif
1451 #ifdef CONFIG_BLK_DEV_4DRIVES
1452 case -11: /* "four" drives on one set of ports */
1453 {
1454 ide_hwif_t *mate = &ide_hwifs[hw^1];
1455 mate->drives[0].select.all ^= 0x20;
1456 mate->drives[1].select.all ^= 0x20;
1457 hwif->chipset = mate->chipset = ide_4drives;
1458 mate->irq = hwif->irq;
1459 memcpy(mate->io_ports, hwif->io_ports, sizeof(hwif->io_ports));
1460 hwif->mate = mate;
1461 mate->mate = hwif;
1462 hwif->serialized = mate->serialized = 1;
1463 goto obsolete_option;
1464 }
1465 #endif /* CONFIG_BLK_DEV_4DRIVES */
1466 case -10: /* minus10 */
1467 case -9: /* minus9 */
1468 case -8: /* minus8 */
1469 case -4:
1470 case -3:
1471 goto bad_option;
1472 case -7: /* ata66 */
1473 #ifdef CONFIG_BLK_DEV_IDEPCI
1474 /*
1475 * Use ATA_CBL_PATA40_SHORT so drive side
1476 * cable detection is also overriden.
1477 */
1478 hwif->cbl = ATA_CBL_PATA40_SHORT;
1479 goto obsolete_option;
1480 #else
1481 goto bad_hwif;
1482 #endif
1483 case -6: /* dma */
1484 hwif->autodma = 1;
1485 goto obsolete_option;
1486 case -5: /* "reset" */
1487 hwif->reset = 1;
1488 goto obsolete_option;
1489 case -2: /* "serialize" */
1490 hwif->mate = &ide_hwifs[hw^1];
1491 hwif->mate->mate = hwif;
1492 hwif->serialized = hwif->mate->serialized = 1;
1493 goto obsolete_option;
1494
1495 case -1: /* "noprobe" */
1496 hwif->noprobe = 1;
1497 goto done;
1498
1499 case 1: /* base */
1500 vals[1] = vals[0] + 0x206; /* default ctl */
1501 case 2: /* base,ctl */
1502 vals[2] = 0; /* default irq = probe for it */
1503 case 3: /* base,ctl,irq */
1504 hwif->hw.irq = vals[2];
1505 ide_init_hwif_ports(&hwif->hw, (unsigned long) vals[0], (unsigned long) vals[1], &hwif->irq);
1506 memcpy(hwif->io_ports, hwif->hw.io_ports, sizeof(hwif->io_ports));
1507 hwif->irq = vals[2];
1508 hwif->noprobe = 0;
1509 hwif->chipset = ide_forced;
1510 goto obsolete_option;
1511
1512 case 0: goto bad_option;
1513 default:
1514 printk(" -- SUPPORT NOT CONFIGURED IN THIS KERNEL\n");
1515 return 1;
1516 }
1517 }
1518 bad_option:
1519 printk(" -- BAD OPTION\n");
1520 return 1;
1521 obsolete_option:
1522 printk(" -- OBSOLETE OPTION, WILL BE REMOVED SOON!\n");
1523 return 1;
1524 bad_hwif:
1525 printk("-- NOT SUPPORTED ON ide%d", hw);
1526 done:
1527 printk("\n");
1528 return 1;
1529 }
1530
1531 extern void __init pnpide_init(void);
1532 extern void __exit pnpide_exit(void);
1533 extern void __init h8300_ide_init(void);
1534
1535 /*
1536 * probe_for_hwifs() finds/initializes "known" IDE interfaces
1537 */
1538 static void __init probe_for_hwifs (void)
1539 {
1540 #ifdef CONFIG_IDEPCI_PCIBUS_ORDER
1541 ide_scan_pcibus(ide_scan_direction);
1542 #endif
1543
1544 #ifdef CONFIG_ETRAX_IDE
1545 {
1546 extern void init_e100_ide(void);
1547 init_e100_ide();
1548 }
1549 #endif /* CONFIG_ETRAX_IDE */
1550 #ifdef CONFIG_BLK_DEV_CMD640
1551 {
1552 extern void ide_probe_for_cmd640x(void);
1553 ide_probe_for_cmd640x();
1554 }
1555 #endif /* CONFIG_BLK_DEV_CMD640 */
1556 #ifdef CONFIG_BLK_DEV_IDE_PMAC
1557 {
1558 extern int pmac_ide_probe(void);
1559 (void)pmac_ide_probe();
1560 }
1561 #endif /* CONFIG_BLK_DEV_IDE_PMAC */
1562 #ifdef CONFIG_BLK_DEV_GAYLE
1563 {
1564 extern void gayle_init(void);
1565 gayle_init();
1566 }
1567 #endif /* CONFIG_BLK_DEV_GAYLE */
1568 #ifdef CONFIG_BLK_DEV_FALCON_IDE
1569 {
1570 extern void falconide_init(void);
1571 falconide_init();
1572 }
1573 #endif /* CONFIG_BLK_DEV_FALCON_IDE */
1574 #ifdef CONFIG_BLK_DEV_MAC_IDE
1575 {
1576 extern void macide_init(void);
1577 macide_init();
1578 }
1579 #endif /* CONFIG_BLK_DEV_MAC_IDE */
1580 #ifdef CONFIG_BLK_DEV_Q40IDE
1581 {
1582 extern void q40ide_init(void);
1583 q40ide_init();
1584 }
1585 #endif /* CONFIG_BLK_DEV_Q40IDE */
1586 #ifdef CONFIG_BLK_DEV_BUDDHA
1587 {
1588 extern void buddha_init(void);
1589 buddha_init();
1590 }
1591 #endif /* CONFIG_BLK_DEV_BUDDHA */
1592 #ifdef CONFIG_BLK_DEV_IDEPNP
1593 pnpide_init();
1594 #endif
1595 #ifdef CONFIG_H8300
1596 h8300_ide_init();
1597 #endif
1598 }
1599
1600 /*
1601 * Probe module
1602 */
1603
1604 EXPORT_SYMBOL(ide_lock);
1605
1606 static int ide_bus_match(struct device *dev, struct device_driver *drv)
1607 {
1608 return 1;
1609 }
1610
1611 static char *media_string(ide_drive_t *drive)
1612 {
1613 switch (drive->media) {
1614 case ide_disk:
1615 return "disk";
1616 case ide_cdrom:
1617 return "cdrom";
1618 case ide_tape:
1619 return "tape";
1620 case ide_floppy:
1621 return "floppy";
1622 case ide_optical:
1623 return "optical";
1624 default:
1625 return "UNKNOWN";
1626 }
1627 }
1628
1629 static ssize_t media_show(struct device *dev, struct device_attribute *attr, char *buf)
1630 {
1631 ide_drive_t *drive = to_ide_device(dev);
1632 return sprintf(buf, "%s\n", media_string(drive));
1633 }
1634
1635 static ssize_t drivename_show(struct device *dev, struct device_attribute *attr, char *buf)
1636 {
1637 ide_drive_t *drive = to_ide_device(dev);
1638 return sprintf(buf, "%s\n", drive->name);
1639 }
1640
1641 static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf)
1642 {
1643 ide_drive_t *drive = to_ide_device(dev);
1644 return sprintf(buf, "ide:m-%s\n", media_string(drive));
1645 }
1646
1647 static struct device_attribute ide_dev_attrs[] = {
1648 __ATTR_RO(media),
1649 __ATTR_RO(drivename),
1650 __ATTR_RO(modalias),
1651 __ATTR_NULL
1652 };
1653
1654 static int ide_uevent(struct device *dev, char **envp, int num_envp,
1655 char *buffer, int buffer_size)
1656 {
1657 ide_drive_t *drive = to_ide_device(dev);
1658 int i = 0;
1659 int length = 0;
1660
1661 add_uevent_var(envp, num_envp, &i, buffer, buffer_size, &length,
1662 "MEDIA=%s", media_string(drive));
1663 add_uevent_var(envp, num_envp, &i, buffer, buffer_size, &length,
1664 "DRIVENAME=%s", drive->name);
1665 add_uevent_var(envp, num_envp, &i, buffer, buffer_size, &length,
1666 "MODALIAS=ide:m-%s", media_string(drive));
1667 envp[i] = NULL;
1668 return 0;
1669 }
1670
1671 static int generic_ide_probe(struct device *dev)
1672 {
1673 ide_drive_t *drive = to_ide_device(dev);
1674 ide_driver_t *drv = to_ide_driver(dev->driver);
1675
1676 return drv->probe ? drv->probe(drive) : -ENODEV;
1677 }
1678
1679 static int generic_ide_remove(struct device *dev)
1680 {
1681 ide_drive_t *drive = to_ide_device(dev);
1682 ide_driver_t *drv = to_ide_driver(dev->driver);
1683
1684 if (drv->remove)
1685 drv->remove(drive);
1686
1687 return 0;
1688 }
1689
1690 static void generic_ide_shutdown(struct device *dev)
1691 {
1692 ide_drive_t *drive = to_ide_device(dev);
1693 ide_driver_t *drv = to_ide_driver(dev->driver);
1694
1695 if (dev->driver && drv->shutdown)
1696 drv->shutdown(drive);
1697 }
1698
1699 struct bus_type ide_bus_type = {
1700 .name = "ide",
1701 .match = ide_bus_match,
1702 .uevent = ide_uevent,
1703 .probe = generic_ide_probe,
1704 .remove = generic_ide_remove,
1705 .shutdown = generic_ide_shutdown,
1706 .dev_attrs = ide_dev_attrs,
1707 .suspend = generic_ide_suspend,
1708 .resume = generic_ide_resume,
1709 };
1710
1711 EXPORT_SYMBOL_GPL(ide_bus_type);
1712
1713 /*
1714 * This is gets invoked once during initialization, to set *everything* up
1715 */
1716 static int __init ide_init(void)
1717 {
1718 int ret;
1719
1720 printk(KERN_INFO "Uniform Multi-Platform E-IDE driver " REVISION "\n");
1721 system_bus_speed = ide_system_bus_speed();
1722
1723 ret = bus_register(&ide_bus_type);
1724 if (ret < 0) {
1725 printk(KERN_WARNING "IDE: bus_register error: %d\n", ret);
1726 return ret;
1727 }
1728
1729 init_ide_data();
1730
1731 proc_ide_create();
1732
1733 #ifdef CONFIG_BLK_DEV_ALI14XX
1734 if (probe_ali14xx)
1735 (void)ali14xx_init();
1736 #endif
1737 #ifdef CONFIG_BLK_DEV_UMC8672
1738 if (probe_umc8672)
1739 (void)umc8672_init();
1740 #endif
1741 #ifdef CONFIG_BLK_DEV_DTC2278
1742 if (probe_dtc2278)
1743 (void)dtc2278_init();
1744 #endif
1745 #ifdef CONFIG_BLK_DEV_HT6560B
1746 if (probe_ht6560b)
1747 (void)ht6560b_init();
1748 #endif
1749 #ifdef CONFIG_BLK_DEV_QD65XX
1750 if (probe_qd65xx)
1751 (void)qd65xx_init();
1752 #endif
1753
1754 /* Probe for special PCI and other "known" interface chipsets. */
1755 probe_for_hwifs();
1756
1757 return 0;
1758 }
1759
1760 #ifdef MODULE
1761 static char *options = NULL;
1762 module_param(options, charp, 0);
1763 MODULE_LICENSE("GPL");
1764
1765 static void __init parse_options (char *line)
1766 {
1767 char *next = line;
1768
1769 if (line == NULL || !*line)
1770 return;
1771 while ((line = next) != NULL) {
1772 if ((next = strchr(line,' ')) != NULL)
1773 *next++ = 0;
1774 if (!ide_setup(line))
1775 printk (KERN_INFO "Unknown option '%s'\n", line);
1776 }
1777 }
1778
1779 int __init init_module (void)
1780 {
1781 parse_options(options);
1782 return ide_init();
1783 }
1784
1785 void __exit cleanup_module (void)
1786 {
1787 int index;
1788
1789 for (index = 0; index < MAX_HWIFS; ++index)
1790 ide_unregister(index);
1791
1792 #ifdef CONFIG_BLK_DEV_IDEPNP
1793 pnpide_exit();
1794 #endif
1795
1796 proc_ide_destroy();
1797
1798 bus_unregister(&ide_bus_type);
1799 }
1800
1801 #else /* !MODULE */
1802
1803 __setup("", ide_setup);
1804
1805 module_init(ide_init);
1806
1807 #endif /* MODULE */
cpufreq for S3C2410