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