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[deliverable/linux.git] / drivers / ide / ide.c
1 /*
2 * linux/drivers/ide/ide.c Version 7.00beta2 Mar 05 2003
3 *
4 * Copyright (C) 1994-1998 Linus Torvalds & authors (see below)
5 */
6
7 /*
8 * Mostly written by Mark Lord <mlord@pobox.com>
9 * and Gadi Oxman <gadio@netvision.net.il>
10 * and Andre Hedrick <andre@linux-ide.org>
11 *
12 * See linux/MAINTAINERS for address of current maintainer.
13 *
14 * This is the multiple IDE interface driver, as evolved from hd.c.
15 * It supports up to MAX_HWIFS IDE interfaces, on one or more IRQs
16 * (usually 14 & 15).
17 * There can be up to two drives per interface, as per the ATA-2 spec.
18 *
19 * 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_BLK_DEV_IDEPCI
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 #ifdef CONFIG_IDE_PROC_FS
351 struct proc_dir_entry *proc_ide_root;
352 #endif
353
354 static struct resource* hwif_request_region(ide_hwif_t *hwif,
355 unsigned long addr, int num)
356 {
357 struct resource *res = request_region(addr, num, hwif->name);
358
359 if (!res)
360 printk(KERN_ERR "%s: I/O resource 0x%lX-0x%lX not free.\n",
361 hwif->name, addr, addr+num-1);
362 return res;
363 }
364
365 /**
366 * ide_hwif_request_regions - request resources for IDE
367 * @hwif: interface to use
368 *
369 * Requests all the needed resources for an interface.
370 * Right now core IDE code does this work which is deeply wrong.
371 * MMIO leaves it to the controller driver,
372 * PIO will migrate this way over time.
373 */
374
375 int ide_hwif_request_regions(ide_hwif_t *hwif)
376 {
377 unsigned long addr;
378 unsigned int i;
379
380 if (hwif->mmio)
381 return 0;
382 addr = hwif->io_ports[IDE_CONTROL_OFFSET];
383 if (addr && !hwif_request_region(hwif, addr, 1))
384 goto control_region_busy;
385 hwif->straight8 = 0;
386 addr = hwif->io_ports[IDE_DATA_OFFSET];
387 if ((addr | 7) == hwif->io_ports[IDE_STATUS_OFFSET]) {
388 if (!hwif_request_region(hwif, addr, 8))
389 goto data_region_busy;
390 hwif->straight8 = 1;
391 return 0;
392 }
393 for (i = IDE_DATA_OFFSET; i <= IDE_STATUS_OFFSET; i++) {
394 addr = hwif->io_ports[i];
395 if (!hwif_request_region(hwif, addr, 1)) {
396 while (--i)
397 release_region(addr, 1);
398 goto data_region_busy;
399 }
400 }
401 return 0;
402
403 data_region_busy:
404 addr = hwif->io_ports[IDE_CONTROL_OFFSET];
405 if (addr)
406 release_region(addr, 1);
407 control_region_busy:
408 /* If any errors are return, we drop the hwif interface. */
409 return -EBUSY;
410 }
411
412 /**
413 * ide_hwif_release_regions - free IDE resources
414 *
415 * Note that we only release the standard ports,
416 * and do not even try to handle any extra ports
417 * allocated for weird IDE interface chipsets.
418 *
419 * Note also that we don't yet handle mmio resources here. More
420 * importantly our caller should be doing this so we need to
421 * restructure this as a helper function for drivers.
422 */
423
424 void ide_hwif_release_regions(ide_hwif_t *hwif)
425 {
426 u32 i = 0;
427
428 if (hwif->mmio)
429 return;
430 if (hwif->io_ports[IDE_CONTROL_OFFSET])
431 release_region(hwif->io_ports[IDE_CONTROL_OFFSET], 1);
432 if (hwif->straight8) {
433 release_region(hwif->io_ports[IDE_DATA_OFFSET], 8);
434 return;
435 }
436 for (i = IDE_DATA_OFFSET; i <= IDE_STATUS_OFFSET; i++)
437 if (hwif->io_ports[i])
438 release_region(hwif->io_ports[i], 1);
439 }
440
441 /**
442 * ide_hwif_restore - restore hwif to template
443 * @hwif: hwif to update
444 * @tmp_hwif: template
445 *
446 * Restore hwif to a previous state by copying most settings
447 * from the template.
448 */
449
450 static void ide_hwif_restore(ide_hwif_t *hwif, ide_hwif_t *tmp_hwif)
451 {
452 hwif->hwgroup = tmp_hwif->hwgroup;
453
454 hwif->gendev.parent = tmp_hwif->gendev.parent;
455
456 hwif->proc = tmp_hwif->proc;
457
458 hwif->major = tmp_hwif->major;
459 hwif->straight8 = tmp_hwif->straight8;
460 hwif->bus_state = tmp_hwif->bus_state;
461
462 hwif->atapi_dma = tmp_hwif->atapi_dma;
463 hwif->ultra_mask = tmp_hwif->ultra_mask;
464 hwif->mwdma_mask = tmp_hwif->mwdma_mask;
465 hwif->swdma_mask = tmp_hwif->swdma_mask;
466
467 hwif->chipset = tmp_hwif->chipset;
468 hwif->hold = tmp_hwif->hold;
469
470 #ifdef CONFIG_BLK_DEV_IDEPCI
471 hwif->pci_dev = tmp_hwif->pci_dev;
472 hwif->cds = tmp_hwif->cds;
473 #endif
474
475 hwif->tuneproc = tmp_hwif->tuneproc;
476 hwif->speedproc = tmp_hwif->speedproc;
477 hwif->udma_filter = tmp_hwif->udma_filter;
478 hwif->selectproc = tmp_hwif->selectproc;
479 hwif->reset_poll = tmp_hwif->reset_poll;
480 hwif->pre_reset = tmp_hwif->pre_reset;
481 hwif->resetproc = tmp_hwif->resetproc;
482 hwif->intrproc = tmp_hwif->intrproc;
483 hwif->maskproc = tmp_hwif->maskproc;
484 hwif->quirkproc = tmp_hwif->quirkproc;
485 hwif->busproc = tmp_hwif->busproc;
486
487 hwif->ata_input_data = tmp_hwif->ata_input_data;
488 hwif->ata_output_data = tmp_hwif->ata_output_data;
489 hwif->atapi_input_bytes = tmp_hwif->atapi_input_bytes;
490 hwif->atapi_output_bytes = tmp_hwif->atapi_output_bytes;
491
492 hwif->dma_setup = tmp_hwif->dma_setup;
493 hwif->dma_exec_cmd = tmp_hwif->dma_exec_cmd;
494 hwif->dma_start = tmp_hwif->dma_start;
495 hwif->ide_dma_end = tmp_hwif->ide_dma_end;
496 hwif->ide_dma_check = tmp_hwif->ide_dma_check;
497 hwif->ide_dma_on = tmp_hwif->ide_dma_on;
498 hwif->dma_off_quietly = tmp_hwif->dma_off_quietly;
499 hwif->ide_dma_test_irq = tmp_hwif->ide_dma_test_irq;
500 hwif->ide_dma_clear_irq = tmp_hwif->ide_dma_clear_irq;
501 hwif->dma_host_on = tmp_hwif->dma_host_on;
502 hwif->dma_host_off = tmp_hwif->dma_host_off;
503 hwif->ide_dma_lostirq = tmp_hwif->ide_dma_lostirq;
504 hwif->ide_dma_timeout = tmp_hwif->ide_dma_timeout;
505
506 hwif->OUTB = tmp_hwif->OUTB;
507 hwif->OUTBSYNC = tmp_hwif->OUTBSYNC;
508 hwif->OUTW = tmp_hwif->OUTW;
509 hwif->OUTSW = tmp_hwif->OUTSW;
510 hwif->OUTSL = tmp_hwif->OUTSL;
511
512 hwif->INB = tmp_hwif->INB;
513 hwif->INW = tmp_hwif->INW;
514 hwif->INSW = tmp_hwif->INSW;
515 hwif->INSL = tmp_hwif->INSL;
516
517 hwif->sg_max_nents = tmp_hwif->sg_max_nents;
518
519 hwif->mmio = tmp_hwif->mmio;
520 hwif->rqsize = tmp_hwif->rqsize;
521 hwif->no_lba48 = tmp_hwif->no_lba48;
522
523 #ifndef CONFIG_BLK_DEV_IDECS
524 hwif->irq = tmp_hwif->irq;
525 #endif
526
527 hwif->dma_base = tmp_hwif->dma_base;
528 hwif->dma_master = tmp_hwif->dma_master;
529 hwif->dma_command = tmp_hwif->dma_command;
530 hwif->dma_vendor1 = tmp_hwif->dma_vendor1;
531 hwif->dma_status = tmp_hwif->dma_status;
532 hwif->dma_vendor3 = tmp_hwif->dma_vendor3;
533 hwif->dma_prdtable = tmp_hwif->dma_prdtable;
534
535 hwif->config_data = tmp_hwif->config_data;
536 hwif->select_data = tmp_hwif->select_data;
537 hwif->extra_base = tmp_hwif->extra_base;
538 hwif->extra_ports = tmp_hwif->extra_ports;
539 hwif->autodma = tmp_hwif->autodma;
540 hwif->udma_four = tmp_hwif->udma_four;
541
542 hwif->hwif_data = tmp_hwif->hwif_data;
543 }
544
545 /**
546 * ide_unregister - free an IDE interface
547 * @index: index of interface (will change soon to a pointer)
548 *
549 * Perform the final unregister of an IDE interface. At the moment
550 * we don't refcount interfaces so this will also get split up.
551 *
552 * Locking:
553 * The caller must not hold the IDE locks
554 * The drive present/vanishing is not yet properly locked
555 * Take care with the callbacks. These have been split to avoid
556 * deadlocking the IDE layer. The shutdown callback is called
557 * before we take the lock and free resources. It is up to the
558 * caller to be sure there is no pending I/O here, and that
559 * the interface will not be reopened (present/vanishing locking
560 * isn't yet done BTW). After we commit to the final kill we
561 * call the cleanup callback with the ide locks held.
562 *
563 * Unregister restores the hwif structures to the default state.
564 * This is raving bonkers.
565 */
566
567 void ide_unregister(unsigned int index)
568 {
569 ide_drive_t *drive;
570 ide_hwif_t *hwif, *g;
571 static ide_hwif_t tmp_hwif; /* protected by ide_cfg_sem */
572 ide_hwgroup_t *hwgroup;
573 int irq_count = 0, unit;
574
575 BUG_ON(index >= MAX_HWIFS);
576
577 BUG_ON(in_interrupt());
578 BUG_ON(irqs_disabled());
579 down(&ide_cfg_sem);
580 spin_lock_irq(&ide_lock);
581 hwif = &ide_hwifs[index];
582 if (!hwif->present)
583 goto abort;
584 for (unit = 0; unit < MAX_DRIVES; ++unit) {
585 drive = &hwif->drives[unit];
586 if (!drive->present)
587 continue;
588 spin_unlock_irq(&ide_lock);
589 device_unregister(&drive->gendev);
590 wait_for_completion(&drive->gendev_rel_comp);
591 spin_lock_irq(&ide_lock);
592 }
593 hwif->present = 0;
594
595 spin_unlock_irq(&ide_lock);
596
597 destroy_proc_ide_interface(hwif);
598
599 hwgroup = hwif->hwgroup;
600 /*
601 * free the irq if we were the only hwif using it
602 */
603 g = hwgroup->hwif;
604 do {
605 if (g->irq == hwif->irq)
606 ++irq_count;
607 g = g->next;
608 } while (g != hwgroup->hwif);
609 if (irq_count == 1)
610 free_irq(hwif->irq, hwgroup);
611
612 spin_lock_irq(&ide_lock);
613 /*
614 * Note that we only release the standard ports,
615 * and do not even try to handle any extra ports
616 * allocated for weird IDE interface chipsets.
617 */
618 ide_hwif_release_regions(hwif);
619
620 /*
621 * Remove us from the hwgroup, and free
622 * the hwgroup if we were the only member
623 */
624 if (hwif->next == hwif) {
625 BUG_ON(hwgroup->hwif != hwif);
626 kfree(hwgroup);
627 } else {
628 /* There is another interface in hwgroup.
629 * Unlink us, and set hwgroup->drive and ->hwif to
630 * something sane.
631 */
632 g = hwgroup->hwif;
633 while (g->next != hwif)
634 g = g->next;
635 g->next = hwif->next;
636 if (hwgroup->hwif == hwif) {
637 /* Chose a random hwif for hwgroup->hwif.
638 * It's guaranteed that there are no drives
639 * left in the hwgroup.
640 */
641 BUG_ON(hwgroup->drive != NULL);
642 hwgroup->hwif = g;
643 }
644 BUG_ON(hwgroup->hwif == hwif);
645 }
646
647 /* More messed up locking ... */
648 spin_unlock_irq(&ide_lock);
649 device_unregister(&hwif->gendev);
650 wait_for_completion(&hwif->gendev_rel_comp);
651
652 /*
653 * Remove us from the kernel's knowledge
654 */
655 blk_unregister_region(MKDEV(hwif->major, 0), MAX_DRIVES<<PARTN_BITS);
656 kfree(hwif->sg_table);
657 unregister_blkdev(hwif->major, hwif->name);
658 spin_lock_irq(&ide_lock);
659
660 if (hwif->dma_base) {
661 (void) ide_release_dma(hwif);
662
663 hwif->dma_base = 0;
664 hwif->dma_master = 0;
665 hwif->dma_command = 0;
666 hwif->dma_vendor1 = 0;
667 hwif->dma_status = 0;
668 hwif->dma_vendor3 = 0;
669 hwif->dma_prdtable = 0;
670
671 hwif->extra_base = 0;
672 hwif->extra_ports = 0;
673 }
674
675 /* copy original settings */
676 tmp_hwif = *hwif;
677
678 /* restore hwif data to pristine status */
679 init_hwif_data(hwif, index);
680 init_hwif_default(hwif, index);
681
682 ide_hwif_restore(hwif, &tmp_hwif);
683
684 abort:
685 spin_unlock_irq(&ide_lock);
686 up(&ide_cfg_sem);
687 }
688
689 EXPORT_SYMBOL(ide_unregister);
690
691
692 /**
693 * ide_setup_ports - set up IDE interface ports
694 * @hw: register descriptions
695 * @base: base register
696 * @offsets: table of register offsets
697 * @ctrl: control register
698 * @ack_irq: IRQ ack
699 * @irq: interrupt lie
700 *
701 * Setup hw_regs_t structure described by parameters. You
702 * may set up the hw structure yourself OR use this routine to
703 * do it for you. This is basically a helper
704 *
705 */
706
707 void ide_setup_ports ( hw_regs_t *hw,
708 unsigned long base, int *offsets,
709 unsigned long ctrl, unsigned long intr,
710 ide_ack_intr_t *ack_intr,
711 /*
712 * ide_io_ops_t *iops,
713 */
714 int irq)
715 {
716 int i;
717
718 memset(hw, 0, sizeof(hw_regs_t));
719 for (i = 0; i < IDE_NR_PORTS; i++) {
720 if (offsets[i] == -1) {
721 switch(i) {
722 case IDE_CONTROL_OFFSET:
723 hw->io_ports[i] = ctrl;
724 break;
725 #if defined(CONFIG_AMIGA) || defined(CONFIG_MAC)
726 case IDE_IRQ_OFFSET:
727 hw->io_ports[i] = intr;
728 break;
729 #endif /* (CONFIG_AMIGA) || (CONFIG_MAC) */
730 default:
731 hw->io_ports[i] = 0;
732 break;
733 }
734 } else {
735 hw->io_ports[i] = base + offsets[i];
736 }
737 }
738 hw->irq = irq;
739 hw->dma = NO_DMA;
740 hw->ack_intr = ack_intr;
741 /*
742 * hw->iops = iops;
743 */
744 }
745
746 /**
747 * ide_register_hw_with_fixup - register IDE interface
748 * @hw: hardware registers
749 * @initializing: set while initializing built-in drivers
750 * @hwifp: pointer to returned hwif
751 * @fixup: fixup function
752 *
753 * Register an IDE interface, specifying exactly the registers etc.
754 * Set init=1 iff calling before probes have taken place.
755 *
756 * Returns -1 on error.
757 */
758
759 int ide_register_hw_with_fixup(hw_regs_t *hw, int initializing,
760 ide_hwif_t **hwifp,
761 void(*fixup)(ide_hwif_t *hwif))
762 {
763 int index, retry = 1;
764 ide_hwif_t *hwif;
765
766 do {
767 for (index = 0; index < MAX_HWIFS; ++index) {
768 hwif = &ide_hwifs[index];
769 if (hwif->hw.io_ports[IDE_DATA_OFFSET] == hw->io_ports[IDE_DATA_OFFSET])
770 goto found;
771 }
772 for (index = 0; index < MAX_HWIFS; ++index) {
773 hwif = &ide_hwifs[index];
774 if (hwif->hold)
775 continue;
776 if ((!hwif->present && !hwif->mate && !initializing) ||
777 (!hwif->hw.io_ports[IDE_DATA_OFFSET] && initializing))
778 goto found;
779 }
780 for (index = 0; index < MAX_HWIFS; index++)
781 ide_unregister(index);
782 } while (retry--);
783 return -1;
784 found:
785 if (hwif->present)
786 ide_unregister(index);
787 else if (!hwif->hold) {
788 init_hwif_data(hwif, index);
789 init_hwif_default(hwif, index);
790 }
791 if (hwif->present)
792 return -1;
793 memcpy(&hwif->hw, hw, sizeof(*hw));
794 memcpy(hwif->io_ports, hwif->hw.io_ports, sizeof(hwif->hw.io_ports));
795 hwif->irq = hw->irq;
796 hwif->noprobe = 0;
797 hwif->chipset = hw->chipset;
798 hwif->gendev.parent = hw->dev;
799
800 if (!initializing) {
801 probe_hwif_init_with_fixup(hwif, fixup);
802 create_proc_ide_interfaces();
803 }
804
805 if (hwifp)
806 *hwifp = hwif;
807
808 return (initializing || hwif->present) ? index : -1;
809 }
810
811 EXPORT_SYMBOL(ide_register_hw_with_fixup);
812
813 int ide_register_hw(hw_regs_t *hw, int initializing, ide_hwif_t **hwifp)
814 {
815 return ide_register_hw_with_fixup(hw, initializing, hwifp, NULL);
816 }
817
818 EXPORT_SYMBOL(ide_register_hw);
819
820 /*
821 * Locks for IDE setting functionality
822 */
823
824 DECLARE_MUTEX(ide_setting_sem);
825
826 EXPORT_SYMBOL_GPL(ide_setting_sem);
827
828 /**
829 * ide_spin_wait_hwgroup - wait for group
830 * @drive: drive in the group
831 *
832 * Wait for an IDE device group to go non busy and then return
833 * holding the ide_lock which guards the hwgroup->busy status
834 * and right to use it.
835 */
836
837 int ide_spin_wait_hwgroup (ide_drive_t *drive)
838 {
839 ide_hwgroup_t *hwgroup = HWGROUP(drive);
840 unsigned long timeout = jiffies + (3 * HZ);
841
842 spin_lock_irq(&ide_lock);
843
844 while (hwgroup->busy) {
845 unsigned long lflags;
846 spin_unlock_irq(&ide_lock);
847 local_irq_set(lflags);
848 if (time_after(jiffies, timeout)) {
849 local_irq_restore(lflags);
850 printk(KERN_ERR "%s: channel busy\n", drive->name);
851 return -EBUSY;
852 }
853 local_irq_restore(lflags);
854 spin_lock_irq(&ide_lock);
855 }
856 return 0;
857 }
858
859 EXPORT_SYMBOL(ide_spin_wait_hwgroup);
860
861 int set_io_32bit(ide_drive_t *drive, int arg)
862 {
863 if (drive->no_io_32bit)
864 return -EPERM;
865
866 if (arg < 0 || arg > 1 + (SUPPORT_VLB_SYNC << 1))
867 return -EINVAL;
868
869 drive->io_32bit = arg;
870 #ifdef CONFIG_BLK_DEV_DTC2278
871 if (HWIF(drive)->chipset == ide_dtc2278)
872 HWIF(drive)->drives[!drive->select.b.unit].io_32bit = arg;
873 #endif /* CONFIG_BLK_DEV_DTC2278 */
874 return 0;
875 }
876
877 static int set_ksettings(ide_drive_t *drive, int arg)
878 {
879 if (arg < 0 || arg > 1)
880 return -EINVAL;
881
882 if (ide_spin_wait_hwgroup(drive))
883 return -EBUSY;
884 drive->keep_settings = arg;
885 spin_unlock_irq(&ide_lock);
886
887 return 0;
888 }
889
890 int set_using_dma(ide_drive_t *drive, int arg)
891 {
892 #ifdef CONFIG_BLK_DEV_IDEDMA
893 ide_hwif_t *hwif = drive->hwif;
894 int err = -EPERM;
895
896 if (arg < 0 || arg > 1)
897 return -EINVAL;
898
899 if (!drive->id || !(drive->id->capability & 1))
900 goto out;
901
902 if (hwif->ide_dma_check == NULL)
903 goto out;
904
905 err = -EBUSY;
906 if (ide_spin_wait_hwgroup(drive))
907 goto out;
908 /*
909 * set ->busy flag, unlock and let it ride
910 */
911 hwif->hwgroup->busy = 1;
912 spin_unlock_irq(&ide_lock);
913
914 err = 0;
915
916 if (arg) {
917 if (ide_set_dma(drive) || hwif->ide_dma_on(drive))
918 err = -EIO;
919 } else
920 ide_dma_off(drive);
921
922 /*
923 * lock, clear ->busy flag and unlock before leaving
924 */
925 spin_lock_irq(&ide_lock);
926 hwif->hwgroup->busy = 0;
927 spin_unlock_irq(&ide_lock);
928 out:
929 return err;
930 #else
931 if (arg < 0 || arg > 1)
932 return -EINVAL;
933
934 return -EPERM;
935 #endif
936 }
937
938 int set_pio_mode(ide_drive_t *drive, int arg)
939 {
940 struct request rq;
941
942 if (arg < 0 || arg > 255)
943 return -EINVAL;
944
945 if (!HWIF(drive)->tuneproc)
946 return -ENOSYS;
947 if (drive->special.b.set_tune)
948 return -EBUSY;
949 ide_init_drive_cmd(&rq);
950 drive->tune_req = (u8) arg;
951 drive->special.b.set_tune = 1;
952 (void) ide_do_drive_cmd(drive, &rq, ide_wait);
953 return 0;
954 }
955
956 static int set_unmaskirq(ide_drive_t *drive, int arg)
957 {
958 if (drive->no_unmask)
959 return -EPERM;
960
961 if (arg < 0 || arg > 1)
962 return -EINVAL;
963
964 if (ide_spin_wait_hwgroup(drive))
965 return -EBUSY;
966 drive->unmask = arg;
967 spin_unlock_irq(&ide_lock);
968
969 return 0;
970 }
971
972 /**
973 * system_bus_clock - clock guess
974 *
975 * External version of the bus clock guess used by very old IDE drivers
976 * for things like VLB timings. Should not be used.
977 */
978
979 int system_bus_clock (void)
980 {
981 return((int) ((!system_bus_speed) ? ide_system_bus_speed() : system_bus_speed ));
982 }
983
984 EXPORT_SYMBOL(system_bus_clock);
985
986 static int generic_ide_suspend(struct device *dev, pm_message_t mesg)
987 {
988 ide_drive_t *drive = dev->driver_data;
989 ide_hwif_t *hwif = HWIF(drive);
990 struct request rq;
991 struct request_pm_state rqpm;
992 ide_task_t args;
993
994 /* Call ACPI _GTM only once */
995 if (!(drive->dn % 2))
996 ide_acpi_get_timing(hwif);
997
998 memset(&rq, 0, sizeof(rq));
999 memset(&rqpm, 0, sizeof(rqpm));
1000 memset(&args, 0, sizeof(args));
1001 rq.cmd_type = REQ_TYPE_PM_SUSPEND;
1002 rq.special = &args;
1003 rq.data = &rqpm;
1004 rqpm.pm_step = ide_pm_state_start_suspend;
1005 if (mesg.event == PM_EVENT_PRETHAW)
1006 mesg.event = PM_EVENT_FREEZE;
1007 rqpm.pm_state = mesg.event;
1008
1009 return ide_do_drive_cmd(drive, &rq, ide_wait);
1010 }
1011
1012 static int generic_ide_resume(struct device *dev)
1013 {
1014 ide_drive_t *drive = dev->driver_data;
1015 ide_hwif_t *hwif = HWIF(drive);
1016 struct request rq;
1017 struct request_pm_state rqpm;
1018 ide_task_t args;
1019
1020 /* Call ACPI _STM only once */
1021 if (!(drive->dn % 2))
1022 ide_acpi_push_timing(hwif);
1023
1024 ide_acpi_exec_tfs(drive);
1025
1026 memset(&rq, 0, sizeof(rq));
1027 memset(&rqpm, 0, sizeof(rqpm));
1028 memset(&args, 0, sizeof(args));
1029 rq.cmd_type = REQ_TYPE_PM_RESUME;
1030 rq.special = &args;
1031 rq.data = &rqpm;
1032 rqpm.pm_step = ide_pm_state_start_resume;
1033 rqpm.pm_state = PM_EVENT_ON;
1034
1035 return ide_do_drive_cmd(drive, &rq, ide_head_wait);
1036 }
1037
1038 int generic_ide_ioctl(ide_drive_t *drive, struct file *file, struct block_device *bdev,
1039 unsigned int cmd, unsigned long arg)
1040 {
1041 unsigned long flags;
1042 ide_driver_t *drv;
1043 void __user *p = (void __user *)arg;
1044 int err = 0, (*setfunc)(ide_drive_t *, int);
1045 u8 *val;
1046
1047 switch (cmd) {
1048 case HDIO_GET_32BIT: val = &drive->io_32bit; goto read_val;
1049 case HDIO_GET_KEEPSETTINGS: val = &drive->keep_settings; goto read_val;
1050 case HDIO_GET_UNMASKINTR: val = &drive->unmask; goto read_val;
1051 case HDIO_GET_DMA: val = &drive->using_dma; goto read_val;
1052 case HDIO_SET_32BIT: setfunc = set_io_32bit; goto set_val;
1053 case HDIO_SET_KEEPSETTINGS: setfunc = set_ksettings; goto set_val;
1054 case HDIO_SET_PIO_MODE: setfunc = set_pio_mode; goto set_val;
1055 case HDIO_SET_UNMASKINTR: setfunc = set_unmaskirq; goto set_val;
1056 case HDIO_SET_DMA: setfunc = set_using_dma; goto set_val;
1057 }
1058
1059 switch (cmd) {
1060 case HDIO_OBSOLETE_IDENTITY:
1061 case HDIO_GET_IDENTITY:
1062 if (bdev != bdev->bd_contains)
1063 return -EINVAL;
1064 if (drive->id_read == 0)
1065 return -ENOMSG;
1066 if (copy_to_user(p, drive->id, (cmd == HDIO_GET_IDENTITY) ? sizeof(*drive->id) : 142))
1067 return -EFAULT;
1068 return 0;
1069
1070 case HDIO_GET_NICE:
1071 return put_user(drive->dsc_overlap << IDE_NICE_DSC_OVERLAP |
1072 drive->atapi_overlap << IDE_NICE_ATAPI_OVERLAP |
1073 drive->nice0 << IDE_NICE_0 |
1074 drive->nice1 << IDE_NICE_1 |
1075 drive->nice2 << IDE_NICE_2,
1076 (long __user *) arg);
1077
1078 #ifdef CONFIG_IDE_TASK_IOCTL
1079 case HDIO_DRIVE_TASKFILE:
1080 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
1081 return -EACCES;
1082 switch(drive->media) {
1083 case ide_disk:
1084 return ide_taskfile_ioctl(drive, cmd, arg);
1085 default:
1086 return -ENOMSG;
1087 }
1088 #endif /* CONFIG_IDE_TASK_IOCTL */
1089
1090 case HDIO_DRIVE_CMD:
1091 if (!capable(CAP_SYS_RAWIO))
1092 return -EACCES;
1093 return ide_cmd_ioctl(drive, cmd, arg);
1094
1095 case HDIO_DRIVE_TASK:
1096 if (!capable(CAP_SYS_RAWIO))
1097 return -EACCES;
1098 return ide_task_ioctl(drive, cmd, arg);
1099
1100 case HDIO_SCAN_HWIF:
1101 {
1102 hw_regs_t hw;
1103 int args[3];
1104 if (!capable(CAP_SYS_RAWIO)) return -EACCES;
1105 if (copy_from_user(args, p, 3 * sizeof(int)))
1106 return -EFAULT;
1107 memset(&hw, 0, sizeof(hw));
1108 ide_init_hwif_ports(&hw, (unsigned long) args[0],
1109 (unsigned long) args[1], NULL);
1110 hw.irq = args[2];
1111 if (ide_register_hw(&hw, 0, NULL) == -1)
1112 return -EIO;
1113 return 0;
1114 }
1115 case HDIO_UNREGISTER_HWIF:
1116 if (!capable(CAP_SYS_RAWIO)) return -EACCES;
1117 /* (arg > MAX_HWIFS) checked in function */
1118 ide_unregister(arg);
1119 return 0;
1120 case HDIO_SET_NICE:
1121 if (!capable(CAP_SYS_ADMIN)) return -EACCES;
1122 if (arg != (arg & ((1 << IDE_NICE_DSC_OVERLAP) | (1 << IDE_NICE_1))))
1123 return -EPERM;
1124 drive->dsc_overlap = (arg >> IDE_NICE_DSC_OVERLAP) & 1;
1125 drv = *(ide_driver_t **)bdev->bd_disk->private_data;
1126 if (drive->dsc_overlap && !drv->supports_dsc_overlap) {
1127 drive->dsc_overlap = 0;
1128 return -EPERM;
1129 }
1130 drive->nice1 = (arg >> IDE_NICE_1) & 1;
1131 return 0;
1132 case HDIO_DRIVE_RESET:
1133 {
1134 unsigned long flags;
1135 if (!capable(CAP_SYS_ADMIN)) return -EACCES;
1136
1137 /*
1138 * Abort the current command on the
1139 * group if there is one, taking
1140 * care not to allow anything else
1141 * to be queued and to die on the
1142 * spot if we miss one somehow
1143 */
1144
1145 spin_lock_irqsave(&ide_lock, flags);
1146
1147 if (HWGROUP(drive)->resetting) {
1148 spin_unlock_irqrestore(&ide_lock, flags);
1149 return -EBUSY;
1150 }
1151
1152 ide_abort(drive, "drive reset");
1153
1154 BUG_ON(HWGROUP(drive)->handler);
1155
1156 /* Ensure nothing gets queued after we
1157 drop the lock. Reset will clear the busy */
1158
1159 HWGROUP(drive)->busy = 1;
1160 spin_unlock_irqrestore(&ide_lock, flags);
1161 (void) ide_do_reset(drive);
1162
1163 return 0;
1164 }
1165
1166 case CDROMEJECT:
1167 case CDROMCLOSETRAY:
1168 return scsi_cmd_ioctl(file, bdev->bd_disk, cmd, p);
1169
1170 case HDIO_GET_BUSSTATE:
1171 if (!capable(CAP_SYS_ADMIN))
1172 return -EACCES;
1173 if (put_user(HWIF(drive)->bus_state, (long __user *)arg))
1174 return -EFAULT;
1175 return 0;
1176
1177 case HDIO_SET_BUSSTATE:
1178 if (!capable(CAP_SYS_ADMIN))
1179 return -EACCES;
1180 if (HWIF(drive)->busproc)
1181 return HWIF(drive)->busproc(drive, (int)arg);
1182 return -EOPNOTSUPP;
1183 default:
1184 return -EINVAL;
1185 }
1186
1187 read_val:
1188 down(&ide_setting_sem);
1189 spin_lock_irqsave(&ide_lock, flags);
1190 err = *val;
1191 spin_unlock_irqrestore(&ide_lock, flags);
1192 up(&ide_setting_sem);
1193 return err >= 0 ? put_user(err, (long __user *)arg) : err;
1194
1195 set_val:
1196 if (bdev != bdev->bd_contains)
1197 err = -EINVAL;
1198 else {
1199 if (!capable(CAP_SYS_ADMIN))
1200 err = -EACCES;
1201 else {
1202 down(&ide_setting_sem);
1203 err = setfunc(drive, arg);
1204 up(&ide_setting_sem);
1205 }
1206 }
1207 return err;
1208 }
1209
1210 EXPORT_SYMBOL(generic_ide_ioctl);
1211
1212 /*
1213 * stridx() returns the offset of c within s,
1214 * or -1 if c is '\0' or not found within s.
1215 */
1216 static int __init stridx (const char *s, char c)
1217 {
1218 char *i = strchr(s, c);
1219 return (i && c) ? i - s : -1;
1220 }
1221
1222 /*
1223 * match_parm() does parsing for ide_setup():
1224 *
1225 * 1. the first char of s must be '='.
1226 * 2. if the remainder matches one of the supplied keywords,
1227 * the index (1 based) of the keyword is negated and returned.
1228 * 3. if the remainder is a series of no more than max_vals numbers
1229 * separated by commas, the numbers are saved in vals[] and a
1230 * count of how many were saved is returned. Base10 is assumed,
1231 * and base16 is allowed when prefixed with "0x".
1232 * 4. otherwise, zero is returned.
1233 */
1234 static int __init match_parm (char *s, const char *keywords[], int vals[], int max_vals)
1235 {
1236 static const char *decimal = "0123456789";
1237 static const char *hex = "0123456789abcdef";
1238 int i, n;
1239
1240 if (*s++ == '=') {
1241 /*
1242 * Try matching against the supplied keywords,
1243 * and return -(index+1) if we match one
1244 */
1245 if (keywords != NULL) {
1246 for (i = 0; *keywords != NULL; ++i) {
1247 if (!strcmp(s, *keywords++))
1248 return -(i+1);
1249 }
1250 }
1251 /*
1252 * Look for a series of no more than "max_vals"
1253 * numeric values separated by commas, in base10,
1254 * or base16 when prefixed with "0x".
1255 * Return a count of how many were found.
1256 */
1257 for (n = 0; (i = stridx(decimal, *s)) >= 0;) {
1258 vals[n] = i;
1259 while ((i = stridx(decimal, *++s)) >= 0)
1260 vals[n] = (vals[n] * 10) + i;
1261 if (*s == 'x' && !vals[n]) {
1262 while ((i = stridx(hex, *++s)) >= 0)
1263 vals[n] = (vals[n] * 0x10) + i;
1264 }
1265 if (++n == max_vals)
1266 break;
1267 if (*s == ',' || *s == ';')
1268 ++s;
1269 }
1270 if (!*s)
1271 return n;
1272 }
1273 return 0; /* zero = nothing matched */
1274 }
1275
1276 #ifdef CONFIG_BLK_DEV_ALI14XX
1277 extern int probe_ali14xx;
1278 extern int ali14xx_init(void);
1279 #endif
1280 #ifdef CONFIG_BLK_DEV_UMC8672
1281 extern int probe_umc8672;
1282 extern int umc8672_init(void);
1283 #endif
1284 #ifdef CONFIG_BLK_DEV_DTC2278
1285 extern int probe_dtc2278;
1286 extern int dtc2278_init(void);
1287 #endif
1288 #ifdef CONFIG_BLK_DEV_HT6560B
1289 extern int probe_ht6560b;
1290 extern int ht6560b_init(void);
1291 #endif
1292 #ifdef CONFIG_BLK_DEV_QD65XX
1293 extern int probe_qd65xx;
1294 extern int qd65xx_init(void);
1295 #endif
1296
1297 static int __initdata is_chipset_set[MAX_HWIFS];
1298
1299 /*
1300 * ide_setup() gets called VERY EARLY during initialization,
1301 * to handle kernel "command line" strings beginning with "hdx=" or "ide".
1302 *
1303 * Remember to update Documentation/ide.txt if you change something here.
1304 */
1305 static int __init ide_setup(char *s)
1306 {
1307 int i, vals[3];
1308 ide_hwif_t *hwif;
1309 ide_drive_t *drive;
1310 unsigned int hw, unit;
1311 const char max_drive = 'a' + ((MAX_HWIFS * MAX_DRIVES) - 1);
1312 const char max_hwif = '0' + (MAX_HWIFS - 1);
1313
1314
1315 if (strncmp(s,"hd",2) == 0 && s[2] == '=') /* hd= is for hd.c */
1316 return 0; /* driver and not us */
1317
1318 if (strncmp(s,"ide",3) && strncmp(s,"idebus",6) && strncmp(s,"hd",2))
1319 return 0;
1320
1321 printk(KERN_INFO "ide_setup: %s", s);
1322 init_ide_data ();
1323
1324 #ifdef CONFIG_BLK_DEV_IDEDOUBLER
1325 if (!strcmp(s, "ide=doubler")) {
1326 extern int ide_doubler;
1327
1328 printk(" : Enabled support for IDE doublers\n");
1329 ide_doubler = 1;
1330 return 1;
1331 }
1332 #endif /* CONFIG_BLK_DEV_IDEDOUBLER */
1333
1334 if (!strcmp(s, "ide=nodma")) {
1335 printk(" : Prevented DMA\n");
1336 noautodma = 1;
1337 return 1;
1338 }
1339
1340 #ifdef CONFIG_BLK_DEV_IDEPCI
1341 if (!strcmp(s, "ide=reverse")) {
1342 ide_scan_direction = 1;
1343 printk(" : Enabled support for IDE inverse scan order.\n");
1344 return 1;
1345 }
1346 #endif /* CONFIG_BLK_DEV_IDEPCI */
1347
1348 #ifdef CONFIG_BLK_DEV_IDEACPI
1349 if (!strcmp(s, "ide=noacpi")) {
1350 //printk(" : Disable IDE ACPI support.\n");
1351 ide_noacpi = 1;
1352 return 1;
1353 }
1354 if (!strcmp(s, "ide=acpigtf")) {
1355 //printk(" : Enable IDE ACPI _GTF support.\n");
1356 ide_noacpitfs = 0;
1357 return 1;
1358 }
1359 if (!strcmp(s, "ide=acpionboot")) {
1360 //printk(" : Call IDE ACPI methods on boot.\n");
1361 ide_noacpionboot = 0;
1362 return 1;
1363 }
1364 #endif /* CONFIG_BLK_DEV_IDEACPI */
1365
1366 /*
1367 * Look for drive options: "hdx="
1368 */
1369 if (s[0] == 'h' && s[1] == 'd' && s[2] >= 'a' && s[2] <= max_drive) {
1370 const char *hd_words[] = {
1371 "none", "noprobe", "nowerr", "cdrom", "minus5",
1372 "autotune", "noautotune", "minus8", "swapdata", "bswap",
1373 "noflush", "remap", "remap63", "scsi", NULL };
1374 unit = s[2] - 'a';
1375 hw = unit / MAX_DRIVES;
1376 unit = unit % MAX_DRIVES;
1377 hwif = &ide_hwifs[hw];
1378 drive = &hwif->drives[unit];
1379 if (strncmp(s + 4, "ide-", 4) == 0) {
1380 strlcpy(drive->driver_req, s + 4, sizeof(drive->driver_req));
1381 goto done;
1382 }
1383 switch (match_parm(&s[3], hd_words, vals, 3)) {
1384 case -1: /* "none" */
1385 case -2: /* "noprobe" */
1386 drive->noprobe = 1;
1387 goto done;
1388 case -3: /* "nowerr" */
1389 drive->bad_wstat = BAD_R_STAT;
1390 hwif->noprobe = 0;
1391 goto done;
1392 case -4: /* "cdrom" */
1393 drive->present = 1;
1394 drive->media = ide_cdrom;
1395 /* an ATAPI device ignores DRDY */
1396 drive->ready_stat = 0;
1397 hwif->noprobe = 0;
1398 goto done;
1399 case -6: /* "autotune" */
1400 drive->autotune = IDE_TUNE_AUTO;
1401 goto obsolete_option;
1402 case -7: /* "noautotune" */
1403 drive->autotune = IDE_TUNE_NOAUTO;
1404 goto obsolete_option;
1405 case -9: /* "swapdata" */
1406 case -10: /* "bswap" */
1407 drive->bswap = 1;
1408 goto done;
1409 case -11: /* noflush */
1410 drive->noflush = 1;
1411 goto done;
1412 case -12: /* "remap" */
1413 drive->remap_0_to_1 = 1;
1414 goto done;
1415 case -13: /* "remap63" */
1416 drive->sect0 = 63;
1417 goto done;
1418 case -14: /* "scsi" */
1419 drive->scsi = 1;
1420 goto done;
1421 case 3: /* cyl,head,sect */
1422 drive->media = ide_disk;
1423 drive->ready_stat = READY_STAT;
1424 drive->cyl = drive->bios_cyl = vals[0];
1425 drive->head = drive->bios_head = vals[1];
1426 drive->sect = drive->bios_sect = vals[2];
1427 drive->present = 1;
1428 drive->forced_geom = 1;
1429 hwif->noprobe = 0;
1430 goto done;
1431 default:
1432 goto bad_option;
1433 }
1434 }
1435
1436 if (s[0] != 'i' || s[1] != 'd' || s[2] != 'e')
1437 goto bad_option;
1438 /*
1439 * Look for bus speed option: "idebus="
1440 */
1441 if (s[3] == 'b' && s[4] == 'u' && s[5] == 's') {
1442 if (match_parm(&s[6], NULL, vals, 1) != 1)
1443 goto bad_option;
1444 if (vals[0] >= 20 && vals[0] <= 66) {
1445 idebus_parameter = vals[0];
1446 } else
1447 printk(" -- BAD BUS SPEED! Expected value from 20 to 66");
1448 goto done;
1449 }
1450 /*
1451 * Look for interface options: "idex="
1452 */
1453 if (s[3] >= '0' && s[3] <= max_hwif) {
1454 /*
1455 * Be VERY CAREFUL changing this: note hardcoded indexes below
1456 * (-8, -9, -10) are reserved to ease the hardcoding.
1457 */
1458 static const char *ide_words[] = {
1459 "noprobe", "serialize", "minus3", "minus4",
1460 "reset", "dma", "ata66", "minus8", "minus9",
1461 "minus10", "four", "qd65xx", "ht6560b", "cmd640_vlb",
1462 "dtc2278", "umc8672", "ali14xx", NULL };
1463 hw = s[3] - '0';
1464 hwif = &ide_hwifs[hw];
1465 i = match_parm(&s[4], ide_words, vals, 3);
1466
1467 /*
1468 * Cryptic check to ensure chipset not already set for hwif.
1469 * Note: we can't depend on hwif->chipset here.
1470 */
1471 if ((i >= -18 && i <= -11) || (i > 0 && i <= 3)) {
1472 /* chipset already specified */
1473 if (is_chipset_set[hw])
1474 goto bad_option;
1475 if (i > -18 && i <= -11) {
1476 /* these drivers are for "ide0=" only */
1477 if (hw != 0)
1478 goto bad_hwif;
1479 /* chipset already specified for 2nd port */
1480 if (is_chipset_set[hw+1])
1481 goto bad_option;
1482 }
1483 is_chipset_set[hw] = 1;
1484 printk("\n");
1485 }
1486
1487 switch (i) {
1488 #ifdef CONFIG_BLK_DEV_ALI14XX
1489 case -17: /* "ali14xx" */
1490 probe_ali14xx = 1;
1491 goto done;
1492 #endif
1493 #ifdef CONFIG_BLK_DEV_UMC8672
1494 case -16: /* "umc8672" */
1495 probe_umc8672 = 1;
1496 goto done;
1497 #endif
1498 #ifdef CONFIG_BLK_DEV_DTC2278
1499 case -15: /* "dtc2278" */
1500 probe_dtc2278 = 1;
1501 goto done;
1502 #endif
1503 #ifdef CONFIG_BLK_DEV_CMD640
1504 case -14: /* "cmd640_vlb" */
1505 {
1506 extern int cmd640_vlb; /* flag for cmd640.c */
1507 cmd640_vlb = 1;
1508 goto done;
1509 }
1510 #endif
1511 #ifdef CONFIG_BLK_DEV_HT6560B
1512 case -13: /* "ht6560b" */
1513 probe_ht6560b = 1;
1514 goto done;
1515 #endif
1516 #ifdef CONFIG_BLK_DEV_QD65XX
1517 case -12: /* "qd65xx" */
1518 probe_qd65xx = 1;
1519 goto done;
1520 #endif
1521 #ifdef CONFIG_BLK_DEV_4DRIVES
1522 case -11: /* "four" drives on one set of ports */
1523 {
1524 ide_hwif_t *mate = &ide_hwifs[hw^1];
1525 mate->drives[0].select.all ^= 0x20;
1526 mate->drives[1].select.all ^= 0x20;
1527 hwif->chipset = mate->chipset = ide_4drives;
1528 mate->irq = hwif->irq;
1529 memcpy(mate->io_ports, hwif->io_ports, sizeof(hwif->io_ports));
1530 hwif->mate = mate;
1531 mate->mate = hwif;
1532 hwif->serialized = mate->serialized = 1;
1533 goto obsolete_option;
1534 }
1535 #endif /* CONFIG_BLK_DEV_4DRIVES */
1536 case -10: /* minus10 */
1537 case -9: /* minus9 */
1538 case -8: /* minus8 */
1539 case -4:
1540 case -3:
1541 goto bad_option;
1542 case -7: /* ata66 */
1543 #ifdef CONFIG_BLK_DEV_IDEPCI
1544 hwif->udma_four = 1;
1545 goto obsolete_option;
1546 #else
1547 goto bad_hwif;
1548 #endif
1549 case -6: /* dma */
1550 hwif->autodma = 1;
1551 goto obsolete_option;
1552 case -5: /* "reset" */
1553 hwif->reset = 1;
1554 goto obsolete_option;
1555 case -2: /* "serialize" */
1556 hwif->mate = &ide_hwifs[hw^1];
1557 hwif->mate->mate = hwif;
1558 hwif->serialized = hwif->mate->serialized = 1;
1559 goto obsolete_option;
1560
1561 case -1: /* "noprobe" */
1562 hwif->noprobe = 1;
1563 goto done;
1564
1565 case 1: /* base */
1566 vals[1] = vals[0] + 0x206; /* default ctl */
1567 case 2: /* base,ctl */
1568 vals[2] = 0; /* default irq = probe for it */
1569 case 3: /* base,ctl,irq */
1570 hwif->hw.irq = vals[2];
1571 ide_init_hwif_ports(&hwif->hw, (unsigned long) vals[0], (unsigned long) vals[1], &hwif->irq);
1572 memcpy(hwif->io_ports, hwif->hw.io_ports, sizeof(hwif->io_ports));
1573 hwif->irq = vals[2];
1574 hwif->noprobe = 0;
1575 hwif->chipset = ide_forced;
1576 goto obsolete_option;
1577
1578 case 0: goto bad_option;
1579 default:
1580 printk(" -- SUPPORT NOT CONFIGURED IN THIS KERNEL\n");
1581 return 1;
1582 }
1583 }
1584 bad_option:
1585 printk(" -- BAD OPTION\n");
1586 return 1;
1587 obsolete_option:
1588 printk(" -- OBSOLETE OPTION, WILL BE REMOVED SOON!\n");
1589 return 1;
1590 bad_hwif:
1591 printk("-- NOT SUPPORTED ON ide%d", hw);
1592 done:
1593 printk("\n");
1594 return 1;
1595 }
1596
1597 extern void __init pnpide_init(void);
1598 extern void __exit pnpide_exit(void);
1599 extern void __init h8300_ide_init(void);
1600
1601 /*
1602 * probe_for_hwifs() finds/initializes "known" IDE interfaces
1603 */
1604 static void __init probe_for_hwifs (void)
1605 {
1606 #ifdef CONFIG_BLK_DEV_IDEPCI
1607 ide_scan_pcibus(ide_scan_direction);
1608 #endif /* CONFIG_BLK_DEV_IDEPCI */
1609
1610 #ifdef CONFIG_ETRAX_IDE
1611 {
1612 extern void init_e100_ide(void);
1613 init_e100_ide();
1614 }
1615 #endif /* CONFIG_ETRAX_IDE */
1616 #ifdef CONFIG_BLK_DEV_CMD640
1617 {
1618 extern void ide_probe_for_cmd640x(void);
1619 ide_probe_for_cmd640x();
1620 }
1621 #endif /* CONFIG_BLK_DEV_CMD640 */
1622 #ifdef CONFIG_BLK_DEV_IDE_PMAC
1623 {
1624 extern int pmac_ide_probe(void);
1625 (void)pmac_ide_probe();
1626 }
1627 #endif /* CONFIG_BLK_DEV_IDE_PMAC */
1628 #ifdef CONFIG_BLK_DEV_GAYLE
1629 {
1630 extern void gayle_init(void);
1631 gayle_init();
1632 }
1633 #endif /* CONFIG_BLK_DEV_GAYLE */
1634 #ifdef CONFIG_BLK_DEV_FALCON_IDE
1635 {
1636 extern void falconide_init(void);
1637 falconide_init();
1638 }
1639 #endif /* CONFIG_BLK_DEV_FALCON_IDE */
1640 #ifdef CONFIG_BLK_DEV_MAC_IDE
1641 {
1642 extern void macide_init(void);
1643 macide_init();
1644 }
1645 #endif /* CONFIG_BLK_DEV_MAC_IDE */
1646 #ifdef CONFIG_BLK_DEV_Q40IDE
1647 {
1648 extern void q40ide_init(void);
1649 q40ide_init();
1650 }
1651 #endif /* CONFIG_BLK_DEV_Q40IDE */
1652 #ifdef CONFIG_BLK_DEV_BUDDHA
1653 {
1654 extern void buddha_init(void);
1655 buddha_init();
1656 }
1657 #endif /* CONFIG_BLK_DEV_BUDDHA */
1658 #ifdef CONFIG_BLK_DEV_IDEPNP
1659 pnpide_init();
1660 #endif
1661 #ifdef CONFIG_H8300
1662 h8300_ide_init();
1663 #endif
1664 }
1665
1666 /*
1667 * Probe module
1668 */
1669
1670 EXPORT_SYMBOL(ide_lock);
1671
1672 static int ide_bus_match(struct device *dev, struct device_driver *drv)
1673 {
1674 return 1;
1675 }
1676
1677 static char *media_string(ide_drive_t *drive)
1678 {
1679 switch (drive->media) {
1680 case ide_disk:
1681 return "disk";
1682 case ide_cdrom:
1683 return "cdrom";
1684 case ide_tape:
1685 return "tape";
1686 case ide_floppy:
1687 return "floppy";
1688 case ide_optical:
1689 return "optical";
1690 default:
1691 return "UNKNOWN";
1692 }
1693 }
1694
1695 static ssize_t media_show(struct device *dev, struct device_attribute *attr, char *buf)
1696 {
1697 ide_drive_t *drive = to_ide_device(dev);
1698 return sprintf(buf, "%s\n", media_string(drive));
1699 }
1700
1701 static ssize_t drivename_show(struct device *dev, struct device_attribute *attr, char *buf)
1702 {
1703 ide_drive_t *drive = to_ide_device(dev);
1704 return sprintf(buf, "%s\n", drive->name);
1705 }
1706
1707 static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf)
1708 {
1709 ide_drive_t *drive = to_ide_device(dev);
1710 return sprintf(buf, "ide:m-%s\n", media_string(drive));
1711 }
1712
1713 static struct device_attribute ide_dev_attrs[] = {
1714 __ATTR_RO(media),
1715 __ATTR_RO(drivename),
1716 __ATTR_RO(modalias),
1717 __ATTR_NULL
1718 };
1719
1720 static int ide_uevent(struct device *dev, char **envp, int num_envp,
1721 char *buffer, int buffer_size)
1722 {
1723 ide_drive_t *drive = to_ide_device(dev);
1724 int i = 0;
1725 int length = 0;
1726
1727 add_uevent_var(envp, num_envp, &i, buffer, buffer_size, &length,
1728 "MEDIA=%s", media_string(drive));
1729 add_uevent_var(envp, num_envp, &i, buffer, buffer_size, &length,
1730 "DRIVENAME=%s", drive->name);
1731 add_uevent_var(envp, num_envp, &i, buffer, buffer_size, &length,
1732 "MODALIAS=ide:m-%s", media_string(drive));
1733 envp[i] = NULL;
1734 return 0;
1735 }
1736
1737 static int generic_ide_probe(struct device *dev)
1738 {
1739 ide_drive_t *drive = to_ide_device(dev);
1740 ide_driver_t *drv = to_ide_driver(dev->driver);
1741
1742 return drv->probe ? drv->probe(drive) : -ENODEV;
1743 }
1744
1745 static int generic_ide_remove(struct device *dev)
1746 {
1747 ide_drive_t *drive = to_ide_device(dev);
1748 ide_driver_t *drv = to_ide_driver(dev->driver);
1749
1750 if (drv->remove)
1751 drv->remove(drive);
1752
1753 return 0;
1754 }
1755
1756 static void generic_ide_shutdown(struct device *dev)
1757 {
1758 ide_drive_t *drive = to_ide_device(dev);
1759 ide_driver_t *drv = to_ide_driver(dev->driver);
1760
1761 if (dev->driver && drv->shutdown)
1762 drv->shutdown(drive);
1763 }
1764
1765 struct bus_type ide_bus_type = {
1766 .name = "ide",
1767 .match = ide_bus_match,
1768 .uevent = ide_uevent,
1769 .probe = generic_ide_probe,
1770 .remove = generic_ide_remove,
1771 .shutdown = generic_ide_shutdown,
1772 .dev_attrs = ide_dev_attrs,
1773 .suspend = generic_ide_suspend,
1774 .resume = generic_ide_resume,
1775 };
1776
1777 EXPORT_SYMBOL_GPL(ide_bus_type);
1778
1779 /*
1780 * This is gets invoked once during initialization, to set *everything* up
1781 */
1782 static int __init ide_init(void)
1783 {
1784 int ret;
1785
1786 printk(KERN_INFO "Uniform Multi-Platform E-IDE driver " REVISION "\n");
1787 system_bus_speed = ide_system_bus_speed();
1788
1789 ret = bus_register(&ide_bus_type);
1790 if (ret < 0) {
1791 printk(KERN_WARNING "IDE: bus_register error: %d\n", ret);
1792 return ret;
1793 }
1794
1795 init_ide_data();
1796
1797 #ifdef CONFIG_IDE_PROC_FS
1798 proc_ide_root = proc_mkdir("ide", NULL);
1799 #endif
1800
1801 #ifdef CONFIG_BLK_DEV_ALI14XX
1802 if (probe_ali14xx)
1803 (void)ali14xx_init();
1804 #endif
1805 #ifdef CONFIG_BLK_DEV_UMC8672
1806 if (probe_umc8672)
1807 (void)umc8672_init();
1808 #endif
1809 #ifdef CONFIG_BLK_DEV_DTC2278
1810 if (probe_dtc2278)
1811 (void)dtc2278_init();
1812 #endif
1813 #ifdef CONFIG_BLK_DEV_HT6560B
1814 if (probe_ht6560b)
1815 (void)ht6560b_init();
1816 #endif
1817 #ifdef CONFIG_BLK_DEV_QD65XX
1818 if (probe_qd65xx)
1819 (void)qd65xx_init();
1820 #endif
1821
1822 /* Probe for special PCI and other "known" interface chipsets. */
1823 probe_for_hwifs();
1824
1825 proc_ide_create();
1826
1827 return 0;
1828 }
1829
1830 #ifdef MODULE
1831 static char *options = NULL;
1832 module_param(options, charp, 0);
1833 MODULE_LICENSE("GPL");
1834
1835 static void __init parse_options (char *line)
1836 {
1837 char *next = line;
1838
1839 if (line == NULL || !*line)
1840 return;
1841 while ((line = next) != NULL) {
1842 if ((next = strchr(line,' ')) != NULL)
1843 *next++ = 0;
1844 if (!ide_setup(line))
1845 printk (KERN_INFO "Unknown option '%s'\n", line);
1846 }
1847 }
1848
1849 int __init init_module (void)
1850 {
1851 parse_options(options);
1852 return ide_init();
1853 }
1854
1855 void __exit cleanup_module (void)
1856 {
1857 int index;
1858
1859 for (index = 0; index < MAX_HWIFS; ++index)
1860 ide_unregister(index);
1861
1862 #ifdef CONFIG_BLK_DEV_IDEPNP
1863 pnpide_exit();
1864 #endif
1865
1866 proc_ide_destroy();
1867
1868 bus_unregister(&ide_bus_type);
1869 }
1870
1871 #else /* !MODULE */
1872
1873 __setup("", ide_setup);
1874
1875 module_init(ide_init);
1876
1877 #endif /* MODULE */
Linux kernel - Deliverables
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