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Linux 2.6.22-rc3
[linux-2.6/next.git] / drivers / ide / ide.c
blob6002713a20a1bdfbcf9f7e2a3f000d491baa6802
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 * Primary: ide0, port 0x1f0; major=3; hda is minor=0; hdb is minor=64
20 * Secondary: ide1, port 0x170; major=22; hdc is minor=0; hdd is minor=64
21 * Tertiary: ide2, port 0x???; major=33; hde is minor=0; hdf is minor=64
22 * Quaternary: ide3, port 0x???; major=34; hdg is minor=0; hdh is minor=64
23 * ...
24 *
25 * From hd.c:
26 * |
27 * | It traverses the request-list, using interrupts to jump between functions.
28 * | As nearly all functions can be called within interrupts, we may not sleep.
29 * | Special care is recommended. Have Fun!
30 * |
31 * | modified by Drew Eckhardt to check nr of hd's from the CMOS.
32 * |
33 * | Thanks to Branko Lankester, lankeste@fwi.uva.nl, who found a bug
34 * | in the early extended-partition checks and added DM partitions.
35 * |
36 * | Early work on error handling by Mika Liljeberg (liljeber@cs.Helsinki.FI).
37 * |
38 * | IRQ-unmask, drive-id, multiple-mode, support for ">16 heads",
39 * | and general streamlining by Mark Lord (mlord@pobox.com).
40 *
41 * October, 1994 -- Complete line-by-line overhaul for linux 1.1.x, by:
42 *
43 * Mark Lord (mlord@pobox.com) (IDE Perf.Pkg)
44 * Delman Lee (delman@ieee.org) ("Mr. atdisk2")
45 * Scott Snyder (snyder@fnald0.fnal.gov) (ATAPI IDE cd-rom)
46 *
47 * This was a rewrite of just about everything from hd.c, though some original
48 * code is still sprinkled about. Think of it as a major evolution, with
49 * inspiration from lots of linux users, esp. hamish@zot.apana.org.au
50 *
51 * Version 1.0 ALPHA initial code, primary i/f working okay
52 * Version 1.3 BETA dual i/f on shared irq tested & working!
53 * Version 1.4 BETA added auto probing for irq(s)
54 * Version 1.5 BETA added ALPHA (untested) support for IDE cd-roms,
55 * ...
56 * Version 5.50 allow values as small as 20 for idebus=
57 * Version 5.51 force non io_32bit in drive_cmd_intr()
58 * change delay_10ms() to delay_50ms() to fix problems
59 * Version 5.52 fix incorrect invalidation of removable devices
60 * add "hdx=slow" command line option
61 * Version 5.60 start to modularize the driver; the disk and ATAPI
62 * drivers can be compiled as loadable modules.
63 * move IDE probe code to ide-probe.c
64 * move IDE disk code to ide-disk.c
65 * add support for generic IDE device subdrivers
66 * add m68k code from Geert Uytterhoeven
67 * probe all interfaces by default
68 * add ioctl to (re)probe an interface
69 * Version 6.00 use per device request queues
70 * attempt to optimize shared hwgroup performance
71 * add ioctl to manually adjust bandwidth algorithms
72 * add kerneld support for the probe module
73 * fix bug in ide_error()
74 * fix bug in the first ide_get_lock() call for Atari
75 * don't flush leftover data for ATAPI devices
76 * Version 6.01 clear hwgroup->active while the hwgroup sleeps
77 * support HDIO_GETGEO for floppies
78 * Version 6.02 fix ide_ack_intr() call
79 * check partition table on floppies
80 * Version 6.03 handle bad status bit sequencing in ide_wait_stat()
81 * Version 6.10 deleted old entries from this list of updates
82 * replaced triton.c with ide-dma.c generic PCI DMA
83 * added support for BIOS-enabled UltraDMA
84 * rename all "promise" things to "pdc4030"
85 * fix EZ-DRIVE handling on small disks
86 * Version 6.11 fix probe error in ide_scan_devices()
87 * fix ancient "jiffies" polling bugs
88 * mask all hwgroup interrupts on each irq entry
89 * Version 6.12 integrate ioctl and proc interfaces
90 * fix parsing of "idex=" command line parameter
91 * Version 6.13 add support for ide4/ide5 courtesy rjones@orchestream.com
92 * Version 6.14 fixed IRQ sharing among PCI devices
93 * Version 6.15 added SMP awareness to IDE drivers
94 * Version 6.16 fixed various bugs; even more SMP friendly
95 * Version 6.17 fix for newest EZ-Drive problem
96 * Version 6.18 default unpartitioned-disk translation now "BIOS LBA"
97 * Version 6.19 Re-design for a UNIFORM driver for all platforms,
98 * model based on suggestions from Russell King and
99 * Geert Uytterhoeven
100 * Promise DC4030VL now supported.
101 * add support for ide6/ide7
102 * delay_50ms() changed to ide_delay_50ms() and exported.
103 * Version 6.20 Added/Fixed Generic ATA-66 support and hwif detection.
104 * Added hdx=flash to allow for second flash disk
105 * detection w/o the hang loop.
106 * Added support for ide8/ide9
107 * Added idex=ata66 for the quirky chipsets that are
108 * ATA-66 compliant, but have yet to determine a method
109 * of verification of the 80c cable presence.
110 * Specifically Promise's PDC20262 chipset.
111 * Version 6.21 Fixing/Fixed SMP spinlock issue with insight from an old
112 * hat that clarified original low level driver design.
113 * Version 6.30 Added SMP support; fixed multmode issues. -ml
114 * Version 6.31 Debug Share INTR's and request queue streaming
115 * Native ATA-100 support
116 * Prep for Cascades Project
117 * Version 7.00alpha First named revision of ide rearrange
118 *
119 * Some additional driver compile-time options are in ./include/linux/ide.h
120 *
121 * To do, in likely order of completion:
122 * - modify kernel to obtain BIOS geometry for drives on 2nd/3rd/4th i/f
123 *
124 */
125
126 #define REVISION "Revision: 7.00alpha2"
127 #define VERSION "Id: ide.c 7.00a2 20020906"
128
129 #define _IDE_C /* Tell ide.h it's really us */
130
131 #include <linux/module.h>
132 #include <linux/types.h>
133 #include <linux/string.h>
134 #include <linux/kernel.h>
135 #include <linux/timer.h>
136 #include <linux/mm.h>
137 #include <linux/interrupt.h>
138 #include <linux/major.h>
139 #include <linux/errno.h>
140 #include <linux/genhd.h>
141 #include <linux/blkpg.h>
142 #include <linux/slab.h>
143 #include <linux/init.h>
144 #include <linux/pci.h>
145 #include <linux/delay.h>
146 #include <linux/ide.h>
147 #include <linux/completion.h>
148 #include <linux/reboot.h>
149 #include <linux/cdrom.h>
150 #include <linux/seq_file.h>
151 #include <linux/device.h>
152 #include <linux/bitops.h>
153
154 #include <asm/byteorder.h>
155 #include <asm/irq.h>
156 #include <asm/uaccess.h>
157 #include <asm/io.h>
158
159
160 /* default maximum number of failures */
161 #define IDE_DEFAULT_MAX_FAILURES 1
162
163 static const u8 ide_hwif_to_major[] = { IDE0_MAJOR, IDE1_MAJOR,
164 IDE2_MAJOR, IDE3_MAJOR,
165 IDE4_MAJOR, IDE5_MAJOR,
166 IDE6_MAJOR, IDE7_MAJOR,
167 IDE8_MAJOR, IDE9_MAJOR };
168
169 static int idebus_parameter; /* holds the "idebus=" parameter */
170 static int system_bus_speed; /* holds what we think is VESA/PCI bus speed */
171
172 DECLARE_MUTEX(ide_cfg_sem);
173 __cacheline_aligned_in_smp DEFINE_SPINLOCK(ide_lock);
174
175 #ifdef CONFIG_IDEPCI_PCIBUS_ORDER
176 static int ide_scan_direction; /* THIS was formerly 2.2.x pci=reverse */
177 #endif
178
179 int noautodma = 0;
180
181 EXPORT_SYMBOL(noautodma);
182
183 #ifdef CONFIG_BLK_DEV_IDEACPI
184 int ide_noacpi = 0;
185 int ide_noacpitfs = 1;
186 int ide_noacpionboot = 1;
187 #endif
188
189 /*
190 * This is declared extern in ide.h, for access by other IDE modules:
191 */
192 ide_hwif_t ide_hwifs[MAX_HWIFS]; /* master data repository */
193
194 EXPORT_SYMBOL(ide_hwifs);
195
196 /*
197 * Do not even *think* about calling this!
198 */
199 static void init_hwif_data(ide_hwif_t *hwif, unsigned int index)
200 {
201 unsigned int unit;
202
203 /* bulk initialize hwif & drive info with zeros */
204 memset(hwif, 0, sizeof(ide_hwif_t));
205
206 /* fill in any non-zero initial values */
207 hwif->index = index;
208 hwif->major = ide_hwif_to_major[index];
209
210 hwif->name[0] = 'i';
211 hwif->name[1] = 'd';
212 hwif->name[2] = 'e';
213 hwif->name[3] = '0' + index;
214
215 hwif->bus_state = BUSSTATE_ON;
216
217 hwif->atapi_dma = 0; /* disable all atapi dma */
218
219 init_completion(&hwif->gendev_rel_comp);
220
221 default_hwif_iops(hwif);
222 default_hwif_transport(hwif);
223 for (unit = 0; unit < MAX_DRIVES; ++unit) {
224 ide_drive_t *drive = &hwif->drives[unit];
225
226 drive->media = ide_disk;
227 drive->select.all = (unit<<4)|0xa0;
228 drive->hwif = hwif;
229 drive->ctl = 0x08;
230 drive->ready_stat = READY_STAT;
231 drive->bad_wstat = BAD_W_STAT;
232 drive->special.b.recalibrate = 1;
233 drive->special.b.set_geometry = 1;
234 drive->name[0] = 'h';
235 drive->name[1] = 'd';
236 drive->name[2] = 'a' + (index * MAX_DRIVES) + unit;
237 drive->max_failures = IDE_DEFAULT_MAX_FAILURES;
238 drive->using_dma = 0;
239 drive->vdma = 0;
240 INIT_LIST_HEAD(&drive->list);
241 init_completion(&drive->gendev_rel_comp);
242 }
243 }
244
245 static void init_hwif_default(ide_hwif_t *hwif, unsigned int index)
246 {
247 hw_regs_t hw;
248
249 memset(&hw, 0, sizeof(hw_regs_t));
250
251 ide_init_hwif_ports(&hw, ide_default_io_base(index), 0, &hwif->irq);
252
253 memcpy(&hwif->hw, &hw, sizeof(hw));
254 memcpy(hwif->io_ports, hw.io_ports, sizeof(hw.io_ports));
255
256 hwif->noprobe = !hwif->io_ports[IDE_DATA_OFFSET];
257 #ifdef CONFIG_BLK_DEV_HD
258 if (hwif->io_ports[IDE_DATA_OFFSET] == HD_DATA)
259 hwif->noprobe = 1; /* may be overridden by ide_setup() */
260 #endif
261 }
262
263 extern void ide_arm_init(void);
264
265 /*
266 * init_ide_data() sets reasonable default values into all fields
267 * of all instances of the hwifs and drives, but only on the first call.
268 * Subsequent calls have no effect (they don't wipe out anything).
269 *
270 * This routine is normally called at driver initialization time,
271 * but may also be called MUCH earlier during kernel "command-line"
272 * parameter processing. As such, we cannot depend on any other parts
273 * of the kernel (such as memory allocation) to be functioning yet.
274 *
275 * This is too bad, as otherwise we could dynamically allocate the
276 * ide_drive_t structs as needed, rather than always consuming memory
277 * for the max possible number (MAX_HWIFS * MAX_DRIVES) of them.
278 *
279 * FIXME: We should stuff the setup data into __init and copy the
280 * relevant hwifs/allocate them properly during boot.
281 */
282 #define MAGIC_COOKIE 0x12345678
283 static void __init init_ide_data (void)
284 {
285 ide_hwif_t *hwif;
286 unsigned int index;
287 static unsigned long magic_cookie = MAGIC_COOKIE;
288
289 if (magic_cookie != MAGIC_COOKIE)
290 return; /* already initialized */
291 magic_cookie = 0;
292
293 /* Initialise all interface structures */
294 for (index = 0; index < MAX_HWIFS; ++index) {
295 hwif = &ide_hwifs[index];
296 init_hwif_data(hwif, index);
297 init_hwif_default(hwif, index);
298 #if !defined(CONFIG_PPC32) || !defined(CONFIG_PCI)
299 hwif->irq = hwif->hw.irq =
300 ide_init_default_irq(hwif->io_ports[IDE_DATA_OFFSET]);
301 #endif
302 }
303 #ifdef CONFIG_IDE_ARM
304 ide_arm_init();
305 #endif
306 }
307
308 /**
309 * ide_system_bus_speed - guess bus speed
310 *
311 * ide_system_bus_speed() returns what we think is the system VESA/PCI
312 * bus speed (in MHz). This is used for calculating interface PIO timings.
313 * The default is 40 for known PCI systems, 50 otherwise.
314 * The "idebus=xx" parameter can be used to override this value.
315 * The actual value to be used is computed/displayed the first time
316 * through. Drivers should only use this as a last resort.
317 *
318 * Returns a guessed speed in MHz.
319 */
320
321 static int ide_system_bus_speed(void)
322 {
323 #ifdef CONFIG_PCI
324 static struct pci_device_id pci_default[] = {
325 { PCI_DEVICE(PCI_ANY_ID, PCI_ANY_ID) },
326 { }
327 };
328 #else
329 #define pci_default 0
330 #endif /* CONFIG_PCI */
331
332 if (!system_bus_speed) {
333 if (idebus_parameter) {
334 /* user supplied value */
335 system_bus_speed = idebus_parameter;
336 } else if (pci_dev_present(pci_default)) {
337 /* safe default value for PCI */
338 system_bus_speed = 33;
339 } else {
340 /* safe default value for VESA and PCI */
341 system_bus_speed = 50;
342 }
343 printk(KERN_INFO "ide: Assuming %dMHz system bus speed "
344 "for PIO modes%s\n", system_bus_speed,
345 idebus_parameter ? "" : "; override with idebus=xx");
346 }
347 return system_bus_speed;
348 }
349
350 static struct resource* hwif_request_region(ide_hwif_t *hwif,
351 unsigned long addr, int num)
352 {
353 struct resource *res = request_region(addr, num, hwif->name);
354
355 if (!res)
356 printk(KERN_ERR "%s: I/O resource 0x%lX-0x%lX not free.\n",
357 hwif->name, addr, addr+num-1);
358 return res;
359 }
360
361 /**
362 * ide_hwif_request_regions - request resources for IDE
363 * @hwif: interface to use
364 *
365 * Requests all the needed resources for an interface.
366 * Right now core IDE code does this work which is deeply wrong.
367 * MMIO leaves it to the controller driver,
368 * PIO will migrate this way over time.
369 */
370
371 int ide_hwif_request_regions(ide_hwif_t *hwif)
372 {
373 unsigned long addr;
374 unsigned int i;
375
376 if (hwif->mmio)
377 return 0;
378 addr = hwif->io_ports[IDE_CONTROL_OFFSET];
379 if (addr && !hwif_request_region(hwif, addr, 1))
380 goto control_region_busy;
381 hwif->straight8 = 0;
382 addr = hwif->io_ports[IDE_DATA_OFFSET];
383 if ((addr | 7) == hwif->io_ports[IDE_STATUS_OFFSET]) {
384 if (!hwif_request_region(hwif, addr, 8))
385 goto data_region_busy;
386 hwif->straight8 = 1;
387 return 0;
388 }
389 for (i = IDE_DATA_OFFSET; i <= IDE_STATUS_OFFSET; i++) {
390 addr = hwif->io_ports[i];
391 if (!hwif_request_region(hwif, addr, 1)) {
392 while (--i)
393 release_region(addr, 1);
394 goto data_region_busy;
395 }
396 }
397 return 0;
398
399 data_region_busy:
400 addr = hwif->io_ports[IDE_CONTROL_OFFSET];
401 if (addr)
402 release_region(addr, 1);
403 control_region_busy:
404 /* If any errors are return, we drop the hwif interface. */
405 return -EBUSY;
406 }
407
408 /**
409 * ide_hwif_release_regions - free IDE resources
410 *
411 * Note that we only release the standard ports,
412 * and do not even try to handle any extra ports
413 * allocated for weird IDE interface chipsets.
414 *
415 * Note also that we don't yet handle mmio resources here. More
416 * importantly our caller should be doing this so we need to
417 * restructure this as a helper function for drivers.
418 */
419
420 void ide_hwif_release_regions(ide_hwif_t *hwif)
421 {
422 u32 i = 0;
423
424 if (hwif->mmio)
425 return;
426 if (hwif->io_ports[IDE_CONTROL_OFFSET])
427 release_region(hwif->io_ports[IDE_CONTROL_OFFSET], 1);
428 if (hwif->straight8) {
429 release_region(hwif->io_ports[IDE_DATA_OFFSET], 8);
430 return;
431 }
432 for (i = IDE_DATA_OFFSET; i <= IDE_STATUS_OFFSET; i++)
433 if (hwif->io_ports[i])
434 release_region(hwif->io_ports[i], 1);
435 }
436
437 /**
438 * ide_hwif_restore - restore hwif to template
439 * @hwif: hwif to update
440 * @tmp_hwif: template
441 *
442 * Restore hwif to a previous state by copying most settings
443 * from the template.
444 */
445
446 static void ide_hwif_restore(ide_hwif_t *hwif, ide_hwif_t *tmp_hwif)
447 {
448 hwif->hwgroup = tmp_hwif->hwgroup;
449
450 hwif->gendev.parent = tmp_hwif->gendev.parent;
451
452 hwif->proc = tmp_hwif->proc;
453
454 hwif->major = tmp_hwif->major;
455 hwif->straight8 = tmp_hwif->straight8;
456 hwif->bus_state = tmp_hwif->bus_state;
457
458 hwif->atapi_dma = tmp_hwif->atapi_dma;
459 hwif->ultra_mask = tmp_hwif->ultra_mask;
460 hwif->mwdma_mask = tmp_hwif->mwdma_mask;
461 hwif->swdma_mask = tmp_hwif->swdma_mask;
462
463 hwif->chipset = tmp_hwif->chipset;
464 hwif->hold = tmp_hwif->hold;
465
466 #ifdef CONFIG_BLK_DEV_IDEPCI
467 hwif->pci_dev = tmp_hwif->pci_dev;
468 hwif->cds = tmp_hwif->cds;
469 #endif
470
471 hwif->tuneproc = tmp_hwif->tuneproc;
472 hwif->speedproc = tmp_hwif->speedproc;
473 hwif->udma_filter = tmp_hwif->udma_filter;
474 hwif->selectproc = tmp_hwif->selectproc;
475 hwif->reset_poll = tmp_hwif->reset_poll;
476 hwif->pre_reset = tmp_hwif->pre_reset;
477 hwif->resetproc = tmp_hwif->resetproc;
478 hwif->intrproc = tmp_hwif->intrproc;
479 hwif->maskproc = tmp_hwif->maskproc;
480 hwif->quirkproc = tmp_hwif->quirkproc;
481 hwif->busproc = tmp_hwif->busproc;
482
483 hwif->ata_input_data = tmp_hwif->ata_input_data;
484 hwif->ata_output_data = tmp_hwif->ata_output_data;
485 hwif->atapi_input_bytes = tmp_hwif->atapi_input_bytes;
486 hwif->atapi_output_bytes = tmp_hwif->atapi_output_bytes;
487
488 hwif->dma_setup = tmp_hwif->dma_setup;
489 hwif->dma_exec_cmd = tmp_hwif->dma_exec_cmd;
490 hwif->dma_start = tmp_hwif->dma_start;
491 hwif->ide_dma_end = tmp_hwif->ide_dma_end;
492 hwif->ide_dma_check = tmp_hwif->ide_dma_check;
493 hwif->ide_dma_on = tmp_hwif->ide_dma_on;
494 hwif->dma_off_quietly = tmp_hwif->dma_off_quietly;
495 hwif->ide_dma_test_irq = tmp_hwif->ide_dma_test_irq;
496 hwif->ide_dma_clear_irq = tmp_hwif->ide_dma_clear_irq;
497 hwif->dma_host_on = tmp_hwif->dma_host_on;
498 hwif->dma_host_off = tmp_hwif->dma_host_off;
499 hwif->ide_dma_lostirq = tmp_hwif->ide_dma_lostirq;
500 hwif->ide_dma_timeout = tmp_hwif->ide_dma_timeout;
501
502 hwif->OUTB = tmp_hwif->OUTB;
503 hwif->OUTBSYNC = tmp_hwif->OUTBSYNC;
504 hwif->OUTW = tmp_hwif->OUTW;
505 hwif->OUTSW = tmp_hwif->OUTSW;
506 hwif->OUTSL = tmp_hwif->OUTSL;
507
508 hwif->INB = tmp_hwif->INB;
509 hwif->INW = tmp_hwif->INW;
510 hwif->INSW = tmp_hwif->INSW;
511 hwif->INSL = tmp_hwif->INSL;
512
513 hwif->sg_max_nents = tmp_hwif->sg_max_nents;
514
515 hwif->mmio = tmp_hwif->mmio;
516 hwif->rqsize = tmp_hwif->rqsize;
517 hwif->no_lba48 = tmp_hwif->no_lba48;
518
519 #ifndef CONFIG_BLK_DEV_IDECS
520 hwif->irq = tmp_hwif->irq;
521 #endif
522
523 hwif->dma_base = tmp_hwif->dma_base;
524 hwif->dma_master = tmp_hwif->dma_master;
525 hwif->dma_command = tmp_hwif->dma_command;
526 hwif->dma_vendor1 = tmp_hwif->dma_vendor1;
527 hwif->dma_status = tmp_hwif->dma_status;
528 hwif->dma_vendor3 = tmp_hwif->dma_vendor3;
529 hwif->dma_prdtable = tmp_hwif->dma_prdtable;
530
531 hwif->config_data = tmp_hwif->config_data;
532 hwif->select_data = tmp_hwif->select_data;
533 hwif->extra_base = tmp_hwif->extra_base;
534 hwif->extra_ports = tmp_hwif->extra_ports;
535 hwif->autodma = tmp_hwif->autodma;
536 hwif->udma_four = tmp_hwif->udma_four;
537
538 hwif->hwif_data = tmp_hwif->hwif_data;
539 }
540
541 /**
542 * ide_unregister - free an IDE interface
543 * @index: index of interface (will change soon to a pointer)
544 *
545 * Perform the final unregister of an IDE interface. At the moment
546 * we don't refcount interfaces so this will also get split up.
547 *
548 * Locking:
549 * The caller must not hold the IDE locks
550 * The drive present/vanishing is not yet properly locked
551 * Take care with the callbacks. These have been split to avoid
552 * deadlocking the IDE layer. The shutdown callback is called
553 * before we take the lock and free resources. It is up to the
554 * caller to be sure there is no pending I/O here, and that
555 * the interface will not be reopened (present/vanishing locking
556 * isn't yet done BTW). After we commit to the final kill we
557 * call the cleanup callback with the ide locks held.
558 *
559 * Unregister restores the hwif structures to the default state.
560 * This is raving bonkers.
561 */
562
563 void ide_unregister(unsigned int index)
564 {
565 ide_drive_t *drive;
566 ide_hwif_t *hwif, *g;
567 static ide_hwif_t tmp_hwif; /* protected by ide_cfg_sem */
568 ide_hwgroup_t *hwgroup;
569 int irq_count = 0, unit;
570
571 BUG_ON(index >= MAX_HWIFS);
572
573 BUG_ON(in_interrupt());
574 BUG_ON(irqs_disabled());
575 down(&ide_cfg_sem);
576 spin_lock_irq(&ide_lock);
577 hwif = &ide_hwifs[index];
578 if (!hwif->present)
579 goto abort;
580 for (unit = 0; unit < MAX_DRIVES; ++unit) {
581 drive = &hwif->drives[unit];
582 if (!drive->present)
583 continue;
584 spin_unlock_irq(&ide_lock);
585 device_unregister(&drive->gendev);
586 wait_for_completion(&drive->gendev_rel_comp);
587 spin_lock_irq(&ide_lock);
588 }
589 hwif->present = 0;
590
591 spin_unlock_irq(&ide_lock);
592
593 ide_proc_unregister_port(hwif);
594
595 hwgroup = hwif->hwgroup;
596 /*
597 * free the irq if we were the only hwif using it
598 */
599 g = hwgroup->hwif;
600 do {
601 if (g->irq == hwif->irq)
602 ++irq_count;
603 g = g->next;
604 } while (g != hwgroup->hwif);
605 if (irq_count == 1)
606 free_irq(hwif->irq, hwgroup);
607
608 spin_lock_irq(&ide_lock);
609 /*
610 * Note that we only release the standard ports,
611 * and do not even try to handle any extra ports
612 * allocated for weird IDE interface chipsets.
613 */
614 ide_hwif_release_regions(hwif);
615
616 /*
617 * Remove us from the hwgroup, and free
618 * the hwgroup if we were the only member
619 */
620 if (hwif->next == hwif) {
621 BUG_ON(hwgroup->hwif != hwif);
622 kfree(hwgroup);
623 } else {
624 /* There is another interface in hwgroup.
625 * Unlink us, and set hwgroup->drive and ->hwif to
626 * something sane.
627 */
628 g = hwgroup->hwif;
629 while (g->next != hwif)
630 g = g->next;
631 g->next = hwif->next;
632 if (hwgroup->hwif == hwif) {
633 /* Chose a random hwif for hwgroup->hwif.
634 * It's guaranteed that there are no drives
635 * left in the hwgroup.
636 */
637 BUG_ON(hwgroup->drive != NULL);
638 hwgroup->hwif = g;
639 }
640 BUG_ON(hwgroup->hwif == hwif);
641 }
642
643 /* More messed up locking ... */
644 spin_unlock_irq(&ide_lock);
645 device_unregister(&hwif->gendev);
646 wait_for_completion(&hwif->gendev_rel_comp);
647
648 /*
649 * Remove us from the kernel's knowledge
650 */
651 blk_unregister_region(MKDEV(hwif->major, 0), MAX_DRIVES<<PARTN_BITS);
652 kfree(hwif->sg_table);
653 unregister_blkdev(hwif->major, hwif->name);
654 spin_lock_irq(&ide_lock);
655
656 if (hwif->dma_base) {
657 (void) ide_release_dma(hwif);
658
659 hwif->dma_base = 0;
660 hwif->dma_master = 0;
661 hwif->dma_command = 0;
662 hwif->dma_vendor1 = 0;
663 hwif->dma_status = 0;
664 hwif->dma_vendor3 = 0;
665 hwif->dma_prdtable = 0;
666
667 hwif->extra_base = 0;
668 hwif->extra_ports = 0;
669 }
670
671 /* copy original settings */
672 tmp_hwif = *hwif;
673
674 /* restore hwif data to pristine status */
675 init_hwif_data(hwif, index);
676 init_hwif_default(hwif, index);
677
678 ide_hwif_restore(hwif, &tmp_hwif);
679
680 abort:
681 spin_unlock_irq(&ide_lock);
682 up(&ide_cfg_sem);
683 }
684
685 EXPORT_SYMBOL(ide_unregister);
686
687
688 /**
689 * ide_setup_ports - set up IDE interface ports
690 * @hw: register descriptions
691 * @base: base register
692 * @offsets: table of register offsets
693 * @ctrl: control register
694 * @ack_irq: IRQ ack
695 * @irq: interrupt lie
696 *
697 * Setup hw_regs_t structure described by parameters. You
698 * may set up the hw structure yourself OR use this routine to
699 * do it for you. This is basically a helper
700 *
701 */
702
703 void ide_setup_ports ( hw_regs_t *hw,
704 unsigned long base, int *offsets,
705 unsigned long ctrl, unsigned long intr,
706 ide_ack_intr_t *ack_intr,
707 /*
708 * ide_io_ops_t *iops,
709 */
710 int irq)
711 {
712 int i;
713
714 memset(hw, 0, sizeof(hw_regs_t));
715 for (i = 0; i < IDE_NR_PORTS; i++) {
716 if (offsets[i] == -1) {
717 switch(i) {
718 case IDE_CONTROL_OFFSET:
719 hw->io_ports[i] = ctrl;
720 break;
721 #if defined(CONFIG_AMIGA) || defined(CONFIG_MAC)
722 case IDE_IRQ_OFFSET:
723 hw->io_ports[i] = intr;
724 break;
725 #endif /* (CONFIG_AMIGA) || (CONFIG_MAC) */
726 default:
727 hw->io_ports[i] = 0;
728 break;
729 }
730 } else {
731 hw->io_ports[i] = base + offsets[i];
732 }
733 }
734 hw->irq = irq;
735 hw->dma = NO_DMA;
736 hw->ack_intr = ack_intr;
737 /*
738 * hw->iops = iops;
739 */
740 }
741
742 /**
743 * ide_register_hw_with_fixup - register IDE interface
744 * @hw: hardware registers
745 * @initializing: set while initializing built-in drivers
746 * @hwifp: pointer to returned hwif
747 * @fixup: fixup function
748 *
749 * Register an IDE interface, specifying exactly the registers etc.
750 * Set init=1 iff calling before probes have taken place.
751 *
752 * Returns -1 on error.
753 */
754
755 int ide_register_hw_with_fixup(hw_regs_t *hw, int initializing,
756 ide_hwif_t **hwifp,
757 void(*fixup)(ide_hwif_t *hwif))
758 {
759 int index, retry = 1;
760 ide_hwif_t *hwif;
761
762 do {
763 for (index = 0; index < MAX_HWIFS; ++index) {
764 hwif = &ide_hwifs[index];
765 if (hwif->hw.io_ports[IDE_DATA_OFFSET] == hw->io_ports[IDE_DATA_OFFSET])
766 goto found;
767 }
768 for (index = 0; index < MAX_HWIFS; ++index) {
769 hwif = &ide_hwifs[index];
770 if (hwif->hold)
771 continue;
772 if ((!hwif->present && !hwif->mate && !initializing) ||
773 (!hwif->hw.io_ports[IDE_DATA_OFFSET] && initializing))
774 goto found;
775 }
776 for (index = 0; index < MAX_HWIFS; index++)
777 ide_unregister(index);
778 } while (retry--);
779 return -1;
780 found:
781 if (hwif->present)
782 ide_unregister(index);
783 else if (!hwif->hold) {
784 init_hwif_data(hwif, index);
785 init_hwif_default(hwif, index);
786 }
787 if (hwif->present)
788 return -1;
789 memcpy(&hwif->hw, hw, sizeof(*hw));
790 memcpy(hwif->io_ports, hwif->hw.io_ports, sizeof(hwif->hw.io_ports));
791 hwif->irq = hw->irq;
792 hwif->noprobe = 0;
793 hwif->chipset = hw->chipset;
794 hwif->gendev.parent = hw->dev;
795
796 if (!initializing) {
797 probe_hwif_init_with_fixup(hwif, fixup);
798 ide_proc_register_port(hwif);
799 }
800
801 if (hwifp)
802 *hwifp = hwif;
803
804 return (initializing || hwif->present) ? index : -1;
805 }
806
807 EXPORT_SYMBOL(ide_register_hw_with_fixup);
808
809 int ide_register_hw(hw_regs_t *hw, int initializing, ide_hwif_t **hwifp)
810 {
811 return ide_register_hw_with_fixup(hw, initializing, hwifp, NULL);
812 }
813
814 EXPORT_SYMBOL(ide_register_hw);
815
816 /*
817 * Locks for IDE setting functionality
818 */
819
820 DECLARE_MUTEX(ide_setting_sem);
821
822 EXPORT_SYMBOL_GPL(ide_setting_sem);
823
824 /**
825 * ide_spin_wait_hwgroup - wait for group
826 * @drive: drive in the group
827 *
828 * Wait for an IDE device group to go non busy and then return
829 * holding the ide_lock which guards the hwgroup->busy status
830 * and right to use it.
831 */
832
833 int ide_spin_wait_hwgroup (ide_drive_t *drive)
834 {
835 ide_hwgroup_t *hwgroup = HWGROUP(drive);
836 unsigned long timeout = jiffies + (3 * HZ);
837
838 spin_lock_irq(&ide_lock);
839
840 while (hwgroup->busy) {
841 unsigned long lflags;
842 spin_unlock_irq(&ide_lock);
843 local_irq_set(lflags);
844 if (time_after(jiffies, timeout)) {
845 local_irq_restore(lflags);
846 printk(KERN_ERR "%s: channel busy\n", drive->name);
847 return -EBUSY;
848 }
849 local_irq_restore(lflags);
850 spin_lock_irq(&ide_lock);
851 }
852 return 0;
853 }
854
855 EXPORT_SYMBOL(ide_spin_wait_hwgroup);
856
857 int set_io_32bit(ide_drive_t *drive, int arg)
858 {
859 if (drive->no_io_32bit)
860 return -EPERM;
861
862 if (arg < 0 || arg > 1 + (SUPPORT_VLB_SYNC << 1))
863 return -EINVAL;
864
865 drive->io_32bit = arg;
866 #ifdef CONFIG_BLK_DEV_DTC2278
867 if (HWIF(drive)->chipset == ide_dtc2278)
868 HWIF(drive)->drives[!drive->select.b.unit].io_32bit = arg;
869 #endif /* CONFIG_BLK_DEV_DTC2278 */
870 return 0;
871 }
872
873 static int set_ksettings(ide_drive_t *drive, int arg)
874 {
875 if (arg < 0 || arg > 1)
876 return -EINVAL;
877
878 if (ide_spin_wait_hwgroup(drive))
879 return -EBUSY;
880 drive->keep_settings = arg;
881 spin_unlock_irq(&ide_lock);
882
883 return 0;
884 }
885
886 int set_using_dma(ide_drive_t *drive, int arg)
887 {
888 #ifdef CONFIG_BLK_DEV_IDEDMA
889 ide_hwif_t *hwif = drive->hwif;
890 int err = -EPERM;
891
892 if (arg < 0 || arg > 1)
893 return -EINVAL;
894
895 if (!drive->id || !(drive->id->capability & 1))
896 goto out;
897
898 if (hwif->ide_dma_check == NULL)
899 goto out;
900
901 err = -EBUSY;
902 if (ide_spin_wait_hwgroup(drive))
903 goto out;
904 /*
905 * set ->busy flag, unlock and let it ride
906 */
907 hwif->hwgroup->busy = 1;
908 spin_unlock_irq(&ide_lock);
909
910 err = 0;
911
912 if (arg) {
913 hwif->dma_off_quietly(drive);
914 if (ide_set_dma(drive) || hwif->ide_dma_on(drive))
915 err = -EIO;
916 } else
917 ide_dma_off(drive);
918
919 /*
920 * lock, clear ->busy flag and unlock before leaving
921 */
922 spin_lock_irq(&ide_lock);
923 hwif->hwgroup->busy = 0;
924 spin_unlock_irq(&ide_lock);
925 out:
926 return err;
927 #else
928 if (arg < 0 || arg > 1)
929 return -EINVAL;
930
931 return -EPERM;
932 #endif
933 }
934
935 int set_pio_mode(ide_drive_t *drive, int arg)
936 {
937 struct request rq;
938
939 if (arg < 0 || arg > 255)
940 return -EINVAL;
941
942 if (!HWIF(drive)->tuneproc)
943 return -ENOSYS;
944 if (drive->special.b.set_tune)
945 return -EBUSY;
946 ide_init_drive_cmd(&rq);
947 drive->tune_req = (u8) arg;
948 drive->special.b.set_tune = 1;
949 (void) ide_do_drive_cmd(drive, &rq, ide_wait);
950 return 0;
951 }
952
953 static int set_unmaskirq(ide_drive_t *drive, int arg)
954 {
955 if (drive->no_unmask)
956 return -EPERM;
957
958 if (arg < 0 || arg > 1)
959 return -EINVAL;
960
961 if (ide_spin_wait_hwgroup(drive))
962 return -EBUSY;
963 drive->unmask = arg;
964 spin_unlock_irq(&ide_lock);
965
966 return 0;
967 }
968
969 /**
970 * system_bus_clock - clock guess
971 *
972 * External version of the bus clock guess used by very old IDE drivers
973 * for things like VLB timings. Should not be used.
974 */
975
976 int system_bus_clock (void)
977 {
978 return((int) ((!system_bus_speed) ? ide_system_bus_speed() : system_bus_speed ));
979 }
980
981 EXPORT_SYMBOL(system_bus_clock);
982
983 static int generic_ide_suspend(struct device *dev, pm_message_t mesg)
984 {
985 ide_drive_t *drive = dev->driver_data;
986 ide_hwif_t *hwif = HWIF(drive);
987 struct request rq;
988 struct request_pm_state rqpm;
989 ide_task_t args;
990
991 /* Call ACPI _GTM only once */
992 if (!(drive->dn % 2))
993 ide_acpi_get_timing(hwif);
994
995 memset(&rq, 0, sizeof(rq));
996 memset(&rqpm, 0, sizeof(rqpm));
997 memset(&args, 0, sizeof(args));
998 rq.cmd_type = REQ_TYPE_PM_SUSPEND;
999 rq.special = &args;
1000 rq.data = &rqpm;
1001 rqpm.pm_step = ide_pm_state_start_suspend;
1002 if (mesg.event == PM_EVENT_PRETHAW)
1003 mesg.event = PM_EVENT_FREEZE;
1004 rqpm.pm_state = mesg.event;
1005
1006 return ide_do_drive_cmd(drive, &rq, ide_wait);
1007 }
1008
1009 static int generic_ide_resume(struct device *dev)
1010 {
1011 ide_drive_t *drive = dev->driver_data;
1012 ide_hwif_t *hwif = HWIF(drive);
1013 struct request rq;
1014 struct request_pm_state rqpm;
1015 ide_task_t args;
1016
1017 /* Call ACPI _STM only once */
1018 if (!(drive->dn % 2))
1019 ide_acpi_push_timing(hwif);
1020
1021 ide_acpi_exec_tfs(drive);
1022
1023 memset(&rq, 0, sizeof(rq));
1024 memset(&rqpm, 0, sizeof(rqpm));
1025 memset(&args, 0, sizeof(args));
1026 rq.cmd_type = REQ_TYPE_PM_RESUME;
1027 rq.special = &args;
1028 rq.data = &rqpm;
1029 rqpm.pm_step = ide_pm_state_start_resume;
1030 rqpm.pm_state = PM_EVENT_ON;
1031
1032 return ide_do_drive_cmd(drive, &rq, ide_head_wait);
1033 }
1034
1035 int generic_ide_ioctl(ide_drive_t *drive, struct file *file, struct block_device *bdev,
1036 unsigned int cmd, unsigned long arg)
1037 {
1038 unsigned long flags;
1039 ide_driver_t *drv;
1040 void __user *p = (void __user *)arg;
1041 int err = 0, (*setfunc)(ide_drive_t *, int);
1042 u8 *val;
1043
1044 switch (cmd) {
1045 case HDIO_GET_32BIT: val = &drive->io_32bit; goto read_val;
1046 case HDIO_GET_KEEPSETTINGS: val = &drive->keep_settings; goto read_val;
1047 case HDIO_GET_UNMASKINTR: val = &drive->unmask; goto read_val;
1048 case HDIO_GET_DMA: val = &drive->using_dma; goto read_val;
1049 case HDIO_SET_32BIT: setfunc = set_io_32bit; goto set_val;
1050 case HDIO_SET_KEEPSETTINGS: setfunc = set_ksettings; goto set_val;
1051 case HDIO_SET_PIO_MODE: setfunc = set_pio_mode; goto set_val;
1052 case HDIO_SET_UNMASKINTR: setfunc = set_unmaskirq; goto set_val;
1053 case HDIO_SET_DMA: setfunc = set_using_dma; goto set_val;
1054 }
1055
1056 switch (cmd) {
1057 case HDIO_OBSOLETE_IDENTITY:
1058 case HDIO_GET_IDENTITY:
1059 if (bdev != bdev->bd_contains)
1060 return -EINVAL;
1061 if (drive->id_read == 0)
1062 return -ENOMSG;
1063 if (copy_to_user(p, drive->id, (cmd == HDIO_GET_IDENTITY) ? sizeof(*drive->id) : 142))
1064 return -EFAULT;
1065 return 0;
1066
1067 case HDIO_GET_NICE:
1068 return put_user(drive->dsc_overlap << IDE_NICE_DSC_OVERLAP |
1069 drive->atapi_overlap << IDE_NICE_ATAPI_OVERLAP |
1070 drive->nice0 << IDE_NICE_0 |
1071 drive->nice1 << IDE_NICE_1 |
1072 drive->nice2 << IDE_NICE_2,
1073 (long __user *) arg);
1074
1075 #ifdef CONFIG_IDE_TASK_IOCTL
1076 case HDIO_DRIVE_TASKFILE:
1077 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
1078 return -EACCES;
1079 switch(drive->media) {
1080 case ide_disk:
1081 return ide_taskfile_ioctl(drive, cmd, arg);
1082 default:
1083 return -ENOMSG;
1084 }
1085 #endif /* CONFIG_IDE_TASK_IOCTL */
1086
1087 case HDIO_DRIVE_CMD:
1088 if (!capable(CAP_SYS_RAWIO))
1089 return -EACCES;
1090 return ide_cmd_ioctl(drive, cmd, arg);
1091
1092 case HDIO_DRIVE_TASK:
1093 if (!capable(CAP_SYS_RAWIO))
1094 return -EACCES;
1095 return ide_task_ioctl(drive, cmd, arg);
1096
1097 case HDIO_SCAN_HWIF:
1098 {
1099 hw_regs_t hw;
1100 int args[3];
1101 if (!capable(CAP_SYS_RAWIO)) return -EACCES;
1102 if (copy_from_user(args, p, 3 * sizeof(int)))
1103 return -EFAULT;
1104 memset(&hw, 0, sizeof(hw));
1105 ide_init_hwif_ports(&hw, (unsigned long) args[0],
1106 (unsigned long) args[1], NULL);
1107 hw.irq = args[2];
1108 if (ide_register_hw(&hw, 0, NULL) == -1)
1109 return -EIO;
1110 return 0;
1111 }
1112 case HDIO_UNREGISTER_HWIF:
1113 if (!capable(CAP_SYS_RAWIO)) return -EACCES;
1114 /* (arg > MAX_HWIFS) checked in function */
1115 ide_unregister(arg);
1116 return 0;
1117 case HDIO_SET_NICE:
1118 if (!capable(CAP_SYS_ADMIN)) return -EACCES;
1119 if (arg != (arg & ((1 << IDE_NICE_DSC_OVERLAP) | (1 << IDE_NICE_1))))
1120 return -EPERM;
1121 drive->dsc_overlap = (arg >> IDE_NICE_DSC_OVERLAP) & 1;
1122 drv = *(ide_driver_t **)bdev->bd_disk->private_data;
1123 if (drive->dsc_overlap && !drv->supports_dsc_overlap) {
1124 drive->dsc_overlap = 0;
1125 return -EPERM;
1126 }
1127 drive->nice1 = (arg >> IDE_NICE_1) & 1;
1128 return 0;
1129 case HDIO_DRIVE_RESET:
1130 {
1131 unsigned long flags;
1132 if (!capable(CAP_SYS_ADMIN)) return -EACCES;
1133
1134 /*
1135 * Abort the current command on the
1136 * group if there is one, taking
1137 * care not to allow anything else
1138 * to be queued and to die on the
1139 * spot if we miss one somehow
1140 */
1141
1142 spin_lock_irqsave(&ide_lock, flags);
1143
1144 if (HWGROUP(drive)->resetting) {
1145 spin_unlock_irqrestore(&ide_lock, flags);
1146 return -EBUSY;
1147 }
1148
1149 ide_abort(drive, "drive reset");
1150
1151 BUG_ON(HWGROUP(drive)->handler);
1152
1153 /* Ensure nothing gets queued after we
1154 drop the lock. Reset will clear the busy */
1155
1156 HWGROUP(drive)->busy = 1;
1157 spin_unlock_irqrestore(&ide_lock, flags);
1158 (void) ide_do_reset(drive);
1159
1160 return 0;
1161 }
1162
1163 case CDROMEJECT:
1164 case CDROMCLOSETRAY:
1165 return scsi_cmd_ioctl(file, bdev->bd_disk, cmd, p);
1166
1167 case HDIO_GET_BUSSTATE:
1168 if (!capable(CAP_SYS_ADMIN))
1169 return -EACCES;
1170 if (put_user(HWIF(drive)->bus_state, (long __user *)arg))
1171 return -EFAULT;
1172 return 0;
1173
1174 case HDIO_SET_BUSSTATE:
1175 if (!capable(CAP_SYS_ADMIN))
1176 return -EACCES;
1177 if (HWIF(drive)->busproc)
1178 return HWIF(drive)->busproc(drive, (int)arg);
1179 return -EOPNOTSUPP;
1180 default:
1181 return -EINVAL;
1182 }
1183
1184 read_val:
1185 down(&ide_setting_sem);
1186 spin_lock_irqsave(&ide_lock, flags);
1187 err = *val;
1188 spin_unlock_irqrestore(&ide_lock, flags);
1189 up(&ide_setting_sem);
1190 return err >= 0 ? put_user(err, (long __user *)arg) : err;
1191
1192 set_val:
1193 if (bdev != bdev->bd_contains)
1194 err = -EINVAL;
1195 else {
1196 if (!capable(CAP_SYS_ADMIN))
1197 err = -EACCES;
1198 else {
1199 down(&ide_setting_sem);
1200 err = setfunc(drive, arg);
1201 up(&ide_setting_sem);
1202 }
1203 }
1204 return err;
1205 }
1206
1207 EXPORT_SYMBOL(generic_ide_ioctl);
1208
1209 /*
1210 * stridx() returns the offset of c within s,
1211 * or -1 if c is '\0' or not found within s.
1212 */
1213 static int __init stridx (const char *s, char c)
1214 {
1215 char *i = strchr(s, c);
1216 return (i && c) ? i - s : -1;
1217 }
1218
1219 /*
1220 * match_parm() does parsing for ide_setup():
1221 *
1222 * 1. the first char of s must be '='.
1223 * 2. if the remainder matches one of the supplied keywords,
1224 * the index (1 based) of the keyword is negated and returned.
1225 * 3. if the remainder is a series of no more than max_vals numbers
1226 * separated by commas, the numbers are saved in vals[] and a
1227 * count of how many were saved is returned. Base10 is assumed,
1228 * and base16 is allowed when prefixed with "0x".
1229 * 4. otherwise, zero is returned.
1230 */
1231 static int __init match_parm (char *s, const char *keywords[], int vals[], int max_vals)
1232 {
1233 static const char *decimal = "0123456789";
1234 static const char *hex = "0123456789abcdef";
1235 int i, n;
1236
1237 if (*s++ == '=') {
1238 /*
1239 * Try matching against the supplied keywords,
1240 * and return -(index+1) if we match one
1241 */
1242 if (keywords != NULL) {
1243 for (i = 0; *keywords != NULL; ++i) {
1244 if (!strcmp(s, *keywords++))
1245 return -(i+1);
1246 }
1247 }
1248 /*
1249 * Look for a series of no more than "max_vals"
1250 * numeric values separated by commas, in base10,
1251 * or base16 when prefixed with "0x".
1252 * Return a count of how many were found.
1253 */
1254 for (n = 0; (i = stridx(decimal, *s)) >= 0;) {
1255 vals[n] = i;
1256 while ((i = stridx(decimal, *++s)) >= 0)
1257 vals[n] = (vals[n] * 10) + i;
1258 if (*s == 'x' && !vals[n]) {
1259 while ((i = stridx(hex, *++s)) >= 0)
1260 vals[n] = (vals[n] * 0x10) + i;
1261 }
1262 if (++n == max_vals)
1263 break;
1264 if (*s == ',' || *s == ';')
1265 ++s;
1266 }
1267 if (!*s)
1268 return n;
1269 }
1270 return 0; /* zero = nothing matched */
1271 }
1272
1273 #ifdef CONFIG_BLK_DEV_ALI14XX
1274 extern int probe_ali14xx;
1275 extern int ali14xx_init(void);
1276 #endif
1277 #ifdef CONFIG_BLK_DEV_UMC8672
1278 extern int probe_umc8672;
1279 extern int umc8672_init(void);
1280 #endif
1281 #ifdef CONFIG_BLK_DEV_DTC2278
1282 extern int probe_dtc2278;
1283 extern int dtc2278_init(void);
1284 #endif
1285 #ifdef CONFIG_BLK_DEV_HT6560B
1286 extern int probe_ht6560b;
1287 extern int ht6560b_init(void);
1288 #endif
1289 #ifdef CONFIG_BLK_DEV_QD65XX
1290 extern int probe_qd65xx;
1291 extern int qd65xx_init(void);
1292 #endif
1293
1294 static int __initdata is_chipset_set[MAX_HWIFS];
1295
1296 /*
1297 * ide_setup() gets called VERY EARLY during initialization,
1298 * to handle kernel "command line" strings beginning with "hdx=" or "ide".
1299 *
1300 * Remember to update Documentation/ide.txt if you change something here.
1301 */
1302 static int __init ide_setup(char *s)
1303 {
1304 int i, vals[3];
1305 ide_hwif_t *hwif;
1306 ide_drive_t *drive;
1307 unsigned int hw, unit;
1308 const char max_drive = 'a' + ((MAX_HWIFS * MAX_DRIVES) - 1);
1309 const char max_hwif = '0' + (MAX_HWIFS - 1);
1310
1311
1312 if (strncmp(s,"hd",2) == 0 && s[2] == '=') /* hd= is for hd.c */
1313 return 0; /* driver and not us */
1314
1315 if (strncmp(s,"ide",3) && strncmp(s,"idebus",6) && strncmp(s,"hd",2))
1316 return 0;
1317
1318 printk(KERN_INFO "ide_setup: %s", s);
1319 init_ide_data ();
1320
1321 #ifdef CONFIG_BLK_DEV_IDEDOUBLER
1322 if (!strcmp(s, "ide=doubler")) {
1323 extern int ide_doubler;
1324
1325 printk(" : Enabled support for IDE doublers\n");
1326 ide_doubler = 1;
1327 return 1;
1328 }
1329 #endif /* CONFIG_BLK_DEV_IDEDOUBLER */
1330
1331 if (!strcmp(s, "ide=nodma")) {
1332 printk(" : Prevented DMA\n");
1333 noautodma = 1;
1334 return 1;
1335 }
1336
1337 #ifdef CONFIG_IDEPCI_PCIBUS_ORDER
1338 if (!strcmp(s, "ide=reverse")) {
1339 ide_scan_direction = 1;
1340 printk(" : Enabled support for IDE inverse scan order.\n");
1341 return 1;
1342 }
1343 #endif
1344
1345 #ifdef CONFIG_BLK_DEV_IDEACPI
1346 if (!strcmp(s, "ide=noacpi")) {
1347 //printk(" : Disable IDE ACPI support.\n");
1348 ide_noacpi = 1;
1349 return 1;
1350 }
1351 if (!strcmp(s, "ide=acpigtf")) {
1352 //printk(" : Enable IDE ACPI _GTF support.\n");
1353 ide_noacpitfs = 0;
1354 return 1;
1355 }
1356 if (!strcmp(s, "ide=acpionboot")) {
1357 //printk(" : Call IDE ACPI methods on boot.\n");
1358 ide_noacpionboot = 0;
1359 return 1;
1360 }
1361 #endif /* CONFIG_BLK_DEV_IDEACPI */
1362
1363 /*
1364 * Look for drive options: "hdx="
1365 */
1366 if (s[0] == 'h' && s[1] == 'd' && s[2] >= 'a' && s[2] <= max_drive) {
1367 const char *hd_words[] = {
1368 "none", "noprobe", "nowerr", "cdrom", "minus5",
1369 "autotune", "noautotune", "minus8", "swapdata", "bswap",
1370 "noflush", "remap", "remap63", "scsi", NULL };
1371 unit = s[2] - 'a';
1372 hw = unit / MAX_DRIVES;
1373 unit = unit % MAX_DRIVES;
1374 hwif = &ide_hwifs[hw];
1375 drive = &hwif->drives[unit];
1376 if (strncmp(s + 4, "ide-", 4) == 0) {
1377 strlcpy(drive->driver_req, s + 4, sizeof(drive->driver_req));
1378 goto done;
1379 }
1380 switch (match_parm(&s[3], hd_words, vals, 3)) {
1381 case -1: /* "none" */
1382 case -2: /* "noprobe" */
1383 drive->noprobe = 1;
1384 goto done;
1385 case -3: /* "nowerr" */
1386 drive->bad_wstat = BAD_R_STAT;
1387 hwif->noprobe = 0;
1388 goto done;
1389 case -4: /* "cdrom" */
1390 drive->present = 1;
1391 drive->media = ide_cdrom;
1392 /* an ATAPI device ignores DRDY */
1393 drive->ready_stat = 0;
1394 hwif->noprobe = 0;
1395 goto done;
1396 case -6: /* "autotune" */
1397 drive->autotune = IDE_TUNE_AUTO;
1398 goto obsolete_option;
1399 case -7: /* "noautotune" */
1400 drive->autotune = IDE_TUNE_NOAUTO;
1401 goto obsolete_option;
1402 case -9: /* "swapdata" */
1403 case -10: /* "bswap" */
1404 drive->bswap = 1;
1405 goto done;
1406 case -11: /* noflush */
1407 drive->noflush = 1;
1408 goto done;
1409 case -12: /* "remap" */
1410 drive->remap_0_to_1 = 1;
1411 goto done;
1412 case -13: /* "remap63" */
1413 drive->sect0 = 63;
1414 goto done;
1415 case -14: /* "scsi" */
1416 drive->scsi = 1;
1417 goto done;
1418 case 3: /* cyl,head,sect */
1419 drive->media = ide_disk;
1420 drive->ready_stat = READY_STAT;
1421 drive->cyl = drive->bios_cyl = vals[0];
1422 drive->head = drive->bios_head = vals[1];
1423 drive->sect = drive->bios_sect = vals[2];
1424 drive->present = 1;
1425 drive->forced_geom = 1;
1426 hwif->noprobe = 0;
1427 goto done;
1428 default:
1429 goto bad_option;
1430 }
1431 }
1432
1433 if (s[0] != 'i' || s[1] != 'd' || s[2] != 'e')
1434 goto bad_option;
1435 /*
1436 * Look for bus speed option: "idebus="
1437 */
1438 if (s[3] == 'b' && s[4] == 'u' && s[5] == 's') {
1439 if (match_parm(&s[6], NULL, vals, 1) != 1)
1440 goto bad_option;
1441 if (vals[0] >= 20 && vals[0] <= 66) {
1442 idebus_parameter = vals[0];
1443 } else
1444 printk(" -- BAD BUS SPEED! Expected value from 20 to 66");
1445 goto done;
1446 }
1447 /*
1448 * Look for interface options: "idex="
1449 */
1450 if (s[3] >= '0' && s[3] <= max_hwif) {
1451 /*
1452 * Be VERY CAREFUL changing this: note hardcoded indexes below
1453 * (-8, -9, -10) are reserved to ease the hardcoding.
1454 */
1455 static const char *ide_words[] = {
1456 "noprobe", "serialize", "minus3", "minus4",
1457 "reset", "dma", "ata66", "minus8", "minus9",
1458 "minus10", "four", "qd65xx", "ht6560b", "cmd640_vlb",
1459 "dtc2278", "umc8672", "ali14xx", NULL };
1460 hw = s[3] - '0';
1461 hwif = &ide_hwifs[hw];
1462 i = match_parm(&s[4], ide_words, vals, 3);
1463
1464 /*
1465 * Cryptic check to ensure chipset not already set for hwif.
1466 * Note: we can't depend on hwif->chipset here.
1467 */
1468 if ((i >= -18 && i <= -11) || (i > 0 && i <= 3)) {
1469 /* chipset already specified */
1470 if (is_chipset_set[hw])
1471 goto bad_option;
1472 if (i > -18 && i <= -11) {
1473 /* these drivers are for "ide0=" only */
1474 if (hw != 0)
1475 goto bad_hwif;
1476 /* chipset already specified for 2nd port */
1477 if (is_chipset_set[hw+1])
1478 goto bad_option;
1479 }
1480 is_chipset_set[hw] = 1;
1481 printk("\n");
1482 }
1483
1484 switch (i) {
1485 #ifdef CONFIG_BLK_DEV_ALI14XX
1486 case -17: /* "ali14xx" */
1487 probe_ali14xx = 1;
1488 goto done;
1489 #endif
1490 #ifdef CONFIG_BLK_DEV_UMC8672
1491 case -16: /* "umc8672" */
1492 probe_umc8672 = 1;
1493 goto done;
1494 #endif
1495 #ifdef CONFIG_BLK_DEV_DTC2278
1496 case -15: /* "dtc2278" */
1497 probe_dtc2278 = 1;
1498 goto done;
1499 #endif
1500 #ifdef CONFIG_BLK_DEV_CMD640
1501 case -14: /* "cmd640_vlb" */
1502 {
1503 extern int cmd640_vlb; /* flag for cmd640.c */
1504 cmd640_vlb = 1;
1505 goto done;
1506 }
1507 #endif
1508 #ifdef CONFIG_BLK_DEV_HT6560B
1509 case -13: /* "ht6560b" */
1510 probe_ht6560b = 1;
1511 goto done;
1512 #endif
1513 #ifdef CONFIG_BLK_DEV_QD65XX
1514 case -12: /* "qd65xx" */
1515 probe_qd65xx = 1;
1516 goto done;
1517 #endif
1518 #ifdef CONFIG_BLK_DEV_4DRIVES
1519 case -11: /* "four" drives on one set of ports */
1520 {
1521 ide_hwif_t *mate = &ide_hwifs[hw^1];
1522 mate->drives[0].select.all ^= 0x20;
1523 mate->drives[1].select.all ^= 0x20;
1524 hwif->chipset = mate->chipset = ide_4drives;
1525 mate->irq = hwif->irq;
1526 memcpy(mate->io_ports, hwif->io_ports, sizeof(hwif->io_ports));
1527 hwif->mate = mate;
1528 mate->mate = hwif;
1529 hwif->serialized = mate->serialized = 1;
1530 goto obsolete_option;
1531 }
1532 #endif /* CONFIG_BLK_DEV_4DRIVES */
1533 case -10: /* minus10 */
1534 case -9: /* minus9 */
1535 case -8: /* minus8 */
1536 case -4:
1537 case -3:
1538 goto bad_option;
1539 case -7: /* ata66 */
1540 #ifdef CONFIG_BLK_DEV_IDEPCI
1541 hwif->udma_four = 1;
1542 goto obsolete_option;
1543 #else
1544 goto bad_hwif;
1545 #endif
1546 case -6: /* dma */
1547 hwif->autodma = 1;
1548 goto obsolete_option;
1549 case -5: /* "reset" */
1550 hwif->reset = 1;
1551 goto obsolete_option;
1552 case -2: /* "serialize" */
1553 hwif->mate = &ide_hwifs[hw^1];
1554 hwif->mate->mate = hwif;
1555 hwif->serialized = hwif->mate->serialized = 1;
1556 goto obsolete_option;
1557
1558 case -1: /* "noprobe" */
1559 hwif->noprobe = 1;
1560 goto done;
1561
1562 case 1: /* base */
1563 vals[1] = vals[0] + 0x206; /* default ctl */
1564 case 2: /* base,ctl */
1565 vals[2] = 0; /* default irq = probe for it */
1566 case 3: /* base,ctl,irq */
1567 hwif->hw.irq = vals[2];
1568 ide_init_hwif_ports(&hwif->hw, (unsigned long) vals[0], (unsigned long) vals[1], &hwif->irq);
1569 memcpy(hwif->io_ports, hwif->hw.io_ports, sizeof(hwif->io_ports));
1570 hwif->irq = vals[2];
1571 hwif->noprobe = 0;
1572 hwif->chipset = ide_forced;
1573 goto obsolete_option;
1574
1575 case 0: goto bad_option;
1576 default:
1577 printk(" -- SUPPORT NOT CONFIGURED IN THIS KERNEL\n");
1578 return 1;
1579 }
1580 }
1581 bad_option:
1582 printk(" -- BAD OPTION\n");
1583 return 1;
1584 obsolete_option:
1585 printk(" -- OBSOLETE OPTION, WILL BE REMOVED SOON!\n");
1586 return 1;
1587 bad_hwif:
1588 printk("-- NOT SUPPORTED ON ide%d", hw);
1589 done:
1590 printk("\n");
1591 return 1;
1592 }
1593
1594 extern void __init pnpide_init(void);
1595 extern void __exit pnpide_exit(void);
1596 extern void __init h8300_ide_init(void);
1597
1598 /*
1599 * probe_for_hwifs() finds/initializes "known" IDE interfaces
1600 */
1601 static void __init probe_for_hwifs (void)
1602 {
1603 #ifdef CONFIG_IDEPCI_PCIBUS_ORDER
1604 ide_scan_pcibus(ide_scan_direction);
1605 #endif
1606
1607 #ifdef CONFIG_ETRAX_IDE
1608 {
1609 extern void init_e100_ide(void);
1610 init_e100_ide();
1611 }
1612 #endif /* CONFIG_ETRAX_IDE */
1613 #ifdef CONFIG_BLK_DEV_CMD640
1614 {
1615 extern void ide_probe_for_cmd640x(void);
1616 ide_probe_for_cmd640x();
1617 }
1618 #endif /* CONFIG_BLK_DEV_CMD640 */
1619 #ifdef CONFIG_BLK_DEV_IDE_PMAC
1620 {
1621 extern int pmac_ide_probe(void);
1622 (void)pmac_ide_probe();
1623 }
1624 #endif /* CONFIG_BLK_DEV_IDE_PMAC */
1625 #ifdef CONFIG_BLK_DEV_GAYLE
1626 {
1627 extern void gayle_init(void);
1628 gayle_init();
1629 }
1630 #endif /* CONFIG_BLK_DEV_GAYLE */
1631 #ifdef CONFIG_BLK_DEV_FALCON_IDE
1632 {
1633 extern void falconide_init(void);
1634 falconide_init();
1635 }
1636 #endif /* CONFIG_BLK_DEV_FALCON_IDE */
1637 #ifdef CONFIG_BLK_DEV_MAC_IDE
1638 {
1639 extern void macide_init(void);
1640 macide_init();
1641 }
1642 #endif /* CONFIG_BLK_DEV_MAC_IDE */
1643 #ifdef CONFIG_BLK_DEV_Q40IDE
1644 {
1645 extern void q40ide_init(void);
1646 q40ide_init();
1647 }
1648 #endif /* CONFIG_BLK_DEV_Q40IDE */
1649 #ifdef CONFIG_BLK_DEV_BUDDHA
1650 {
1651 extern void buddha_init(void);
1652 buddha_init();
1653 }
1654 #endif /* CONFIG_BLK_DEV_BUDDHA */
1655 #ifdef CONFIG_BLK_DEV_IDEPNP
1656 pnpide_init();
1657 #endif
1658 #ifdef CONFIG_H8300
1659 h8300_ide_init();
1660 #endif
1661 }
1662
1663 /*
1664 * Probe module
1665 */
1666
1667 EXPORT_SYMBOL(ide_lock);
1668
1669 static int ide_bus_match(struct device *dev, struct device_driver *drv)
1670 {
1671 return 1;
1672 }
1673
1674 static char *media_string(ide_drive_t *drive)
1675 {
1676 switch (drive->media) {
1677 case ide_disk:
1678 return "disk";
1679 case ide_cdrom:
1680 return "cdrom";
1681 case ide_tape:
1682 return "tape";
1683 case ide_floppy:
1684 return "floppy";
1685 case ide_optical:
1686 return "optical";
1687 default:
1688 return "UNKNOWN";
1689 }
1690 }
1691
1692 static ssize_t media_show(struct device *dev, struct device_attribute *attr, char *buf)
1693 {
1694 ide_drive_t *drive = to_ide_device(dev);
1695 return sprintf(buf, "%s\n", media_string(drive));
1696 }
1697
1698 static ssize_t drivename_show(struct device *dev, struct device_attribute *attr, char *buf)
1699 {
1700 ide_drive_t *drive = to_ide_device(dev);
1701 return sprintf(buf, "%s\n", drive->name);
1702 }
1703
1704 static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf)
1705 {
1706 ide_drive_t *drive = to_ide_device(dev);
1707 return sprintf(buf, "ide:m-%s\n", media_string(drive));
1708 }
1709
1710 static struct device_attribute ide_dev_attrs[] = {
1711 __ATTR_RO(media),
1712 __ATTR_RO(drivename),
1713 __ATTR_RO(modalias),
1714 __ATTR_NULL
1715 };
1716
1717 static int ide_uevent(struct device *dev, char **envp, int num_envp,
1718 char *buffer, int buffer_size)
1719 {
1720 ide_drive_t *drive = to_ide_device(dev);
1721 int i = 0;
1722 int length = 0;
1723
1724 add_uevent_var(envp, num_envp, &i, buffer, buffer_size, &length,
1725 "MEDIA=%s", media_string(drive));
1726 add_uevent_var(envp, num_envp, &i, buffer, buffer_size, &length,
1727 "DRIVENAME=%s", drive->name);
1728 add_uevent_var(envp, num_envp, &i, buffer, buffer_size, &length,
1729 "MODALIAS=ide:m-%s", media_string(drive));
1730 envp[i] = NULL;
1731 return 0;
1732 }
1733
1734 static int generic_ide_probe(struct device *dev)
1735 {
1736 ide_drive_t *drive = to_ide_device(dev);
1737 ide_driver_t *drv = to_ide_driver(dev->driver);
1738
1739 return drv->probe ? drv->probe(drive) : -ENODEV;
1740 }
1741
1742 static int generic_ide_remove(struct device *dev)
1743 {
1744 ide_drive_t *drive = to_ide_device(dev);
1745 ide_driver_t *drv = to_ide_driver(dev->driver);
1746
1747 if (drv->remove)
1748 drv->remove(drive);
1749
1750 return 0;
1751 }
1752
1753 static void generic_ide_shutdown(struct device *dev)
1754 {
1755 ide_drive_t *drive = to_ide_device(dev);
1756 ide_driver_t *drv = to_ide_driver(dev->driver);
1757
1758 if (dev->driver && drv->shutdown)
1759 drv->shutdown(drive);
1760 }
1761
1762 struct bus_type ide_bus_type = {
1763 .name = "ide",
1764 .match = ide_bus_match,
1765 .uevent = ide_uevent,
1766 .probe = generic_ide_probe,
1767 .remove = generic_ide_remove,
1768 .shutdown = generic_ide_shutdown,
1769 .dev_attrs = ide_dev_attrs,
1770 .suspend = generic_ide_suspend,
1771 .resume = generic_ide_resume,
1772 };
1773
1774 EXPORT_SYMBOL_GPL(ide_bus_type);
1775
1776 /*
1777 * This is gets invoked once during initialization, to set *everything* up
1778 */
1779 static int __init ide_init(void)
1780 {
1781 int ret;
1782
1783 printk(KERN_INFO "Uniform Multi-Platform E-IDE driver " REVISION "\n");
1784 system_bus_speed = ide_system_bus_speed();
1785
1786 ret = bus_register(&ide_bus_type);
1787 if (ret < 0) {
1788 printk(KERN_WARNING "IDE: bus_register error: %d\n", ret);
1789 return ret;
1790 }
1791
1792 init_ide_data();
1793
1794 proc_ide_create();
1795
1796 #ifdef CONFIG_BLK_DEV_ALI14XX
1797 if (probe_ali14xx)
1798 (void)ali14xx_init();
1799 #endif
1800 #ifdef CONFIG_BLK_DEV_UMC8672
1801 if (probe_umc8672)
1802 (void)umc8672_init();
1803 #endif
1804 #ifdef CONFIG_BLK_DEV_DTC2278
1805 if (probe_dtc2278)
1806 (void)dtc2278_init();
1807 #endif
1808 #ifdef CONFIG_BLK_DEV_HT6560B
1809 if (probe_ht6560b)
1810 (void)ht6560b_init();
1811 #endif
1812 #ifdef CONFIG_BLK_DEV_QD65XX
1813 if (probe_qd65xx)
1814 (void)qd65xx_init();
1815 #endif
1816
1817 /* Probe for special PCI and other "known" interface chipsets. */
1818 probe_for_hwifs();
1819
1820 return 0;
1821 }
1822
1823 #ifdef MODULE
1824 static char *options = NULL;
1825 module_param(options, charp, 0);
1826 MODULE_LICENSE("GPL");
1827
1828 static void __init parse_options (char *line)
1829 {
1830 char *next = line;
1831
1832 if (line == NULL || !*line)
1833 return;
1834 while ((line = next) != NULL) {
1835 if ((next = strchr(line,' ')) != NULL)
1836 *next++ = 0;
1837 if (!ide_setup(line))
1838 printk (KERN_INFO "Unknown option '%s'\n", line);
1839 }
1840 }
1841
1842 int __init init_module (void)
1843 {
1844 parse_options(options);
1845 return ide_init();
1846 }
1847
1848 void __exit cleanup_module (void)
1849 {
1850 int index;
1851
1852 for (index = 0; index < MAX_HWIFS; ++index)
1853 ide_unregister(index);
1854
1855 #ifdef CONFIG_BLK_DEV_IDEPNP
1856 pnpide_exit();
1857 #endif
1858
1859 proc_ide_destroy();
1860
1861 bus_unregister(&ide_bus_type);
1862 }
1863
1864 #else /* !MODULE */
1865
1866 __setup("", ide_setup);
1867
1868 module_init(ide_init);
1869
1870 #endif /* MODULE */
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