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[mirror_ubuntu-bionic-kernel.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_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 if (ide_set_dma(drive) || hwif->ide_dma_on(drive))
914 err = -EIO;
915 } else
916 ide_dma_off(drive);
917
918 /*
919 * lock, clear ->busy flag and unlock before leaving
920 */
921 spin_lock_irq(&ide_lock);
922 hwif->hwgroup->busy = 0;
923 spin_unlock_irq(&ide_lock);
924 out:
925 return err;
926 #else
927 if (arg < 0 || arg > 1)
928 return -EINVAL;
929
930 return -EPERM;
931 #endif
932 }
933
934 int set_pio_mode(ide_drive_t *drive, int arg)
935 {
936 struct request rq;
937
938 if (arg < 0 || arg > 255)
939 return -EINVAL;
940
941 if (!HWIF(drive)->tuneproc)
942 return -ENOSYS;
943 if (drive->special.b.set_tune)
944 return -EBUSY;
945 ide_init_drive_cmd(&rq);
946 drive->tune_req = (u8) arg;
947 drive->special.b.set_tune = 1;
948 (void) ide_do_drive_cmd(drive, &rq, ide_wait);
949 return 0;
950 }
951
952 static int set_unmaskirq(ide_drive_t *drive, int arg)
953 {
954 if (drive->no_unmask)
955 return -EPERM;
956
957 if (arg < 0 || arg > 1)
958 return -EINVAL;
959
960 if (ide_spin_wait_hwgroup(drive))
961 return -EBUSY;
962 drive->unmask = arg;
963 spin_unlock_irq(&ide_lock);
964
965 return 0;
966 }
967
968 /**
969 * system_bus_clock - clock guess
970 *
971 * External version of the bus clock guess used by very old IDE drivers
972 * for things like VLB timings. Should not be used.
973 */
974
975 int system_bus_clock (void)
976 {
977 return((int) ((!system_bus_speed) ? ide_system_bus_speed() : system_bus_speed ));
978 }
979
980 EXPORT_SYMBOL(system_bus_clock);
981
982 static int generic_ide_suspend(struct device *dev, pm_message_t mesg)
983 {
984 ide_drive_t *drive = dev->driver_data;
985 ide_hwif_t *hwif = HWIF(drive);
986 struct request rq;
987 struct request_pm_state rqpm;
988 ide_task_t args;
989
990 /* Call ACPI _GTM only once */
991 if (!(drive->dn % 2))
992 ide_acpi_get_timing(hwif);
993
994 memset(&rq, 0, sizeof(rq));
995 memset(&rqpm, 0, sizeof(rqpm));
996 memset(&args, 0, sizeof(args));
997 rq.cmd_type = REQ_TYPE_PM_SUSPEND;
998 rq.special = &args;
999 rq.data = &rqpm;
1000 rqpm.pm_step = ide_pm_state_start_suspend;
1001 if (mesg.event == PM_EVENT_PRETHAW)
1002 mesg.event = PM_EVENT_FREEZE;
1003 rqpm.pm_state = mesg.event;
1004
1005 return ide_do_drive_cmd(drive, &rq, ide_wait);
1006 }
1007
1008 static int generic_ide_resume(struct device *dev)
1009 {
1010 ide_drive_t *drive = dev->driver_data;
1011 ide_hwif_t *hwif = HWIF(drive);
1012 struct request rq;
1013 struct request_pm_state rqpm;
1014 ide_task_t args;
1015
1016 /* Call ACPI _STM only once */
1017 if (!(drive->dn % 2))
1018 ide_acpi_push_timing(hwif);
1019
1020 ide_acpi_exec_tfs(drive);
1021
1022 memset(&rq, 0, sizeof(rq));
1023 memset(&rqpm, 0, sizeof(rqpm));
1024 memset(&args, 0, sizeof(args));
1025 rq.cmd_type = REQ_TYPE_PM_RESUME;
1026 rq.special = &args;
1027 rq.data = &rqpm;
1028 rqpm.pm_step = ide_pm_state_start_resume;
1029 rqpm.pm_state = PM_EVENT_ON;
1030
1031 return ide_do_drive_cmd(drive, &rq, ide_head_wait);
1032 }
1033
1034 int generic_ide_ioctl(ide_drive_t *drive, struct file *file, struct block_device *bdev,
1035 unsigned int cmd, unsigned long arg)
1036 {
1037 unsigned long flags;
1038 ide_driver_t *drv;
1039 void __user *p = (void __user *)arg;
1040 int err = 0, (*setfunc)(ide_drive_t *, int);
1041 u8 *val;
1042
1043 switch (cmd) {
1044 case HDIO_GET_32BIT: val = &drive->io_32bit; goto read_val;
1045 case HDIO_GET_KEEPSETTINGS: val = &drive->keep_settings; goto read_val;
1046 case HDIO_GET_UNMASKINTR: val = &drive->unmask; goto read_val;
1047 case HDIO_GET_DMA: val = &drive->using_dma; goto read_val;
1048 case HDIO_SET_32BIT: setfunc = set_io_32bit; goto set_val;
1049 case HDIO_SET_KEEPSETTINGS: setfunc = set_ksettings; goto set_val;
1050 case HDIO_SET_PIO_MODE: setfunc = set_pio_mode; goto set_val;
1051 case HDIO_SET_UNMASKINTR: setfunc = set_unmaskirq; goto set_val;
1052 case HDIO_SET_DMA: setfunc = set_using_dma; goto set_val;
1053 }
1054
1055 switch (cmd) {
1056 case HDIO_OBSOLETE_IDENTITY:
1057 case HDIO_GET_IDENTITY:
1058 if (bdev != bdev->bd_contains)
1059 return -EINVAL;
1060 if (drive->id_read == 0)
1061 return -ENOMSG;
1062 if (copy_to_user(p, drive->id, (cmd == HDIO_GET_IDENTITY) ? sizeof(*drive->id) : 142))
1063 return -EFAULT;
1064 return 0;
1065
1066 case HDIO_GET_NICE:
1067 return put_user(drive->dsc_overlap << IDE_NICE_DSC_OVERLAP |
1068 drive->atapi_overlap << IDE_NICE_ATAPI_OVERLAP |
1069 drive->nice0 << IDE_NICE_0 |
1070 drive->nice1 << IDE_NICE_1 |
1071 drive->nice2 << IDE_NICE_2,
1072 (long __user *) arg);
1073
1074 #ifdef CONFIG_IDE_TASK_IOCTL
1075 case HDIO_DRIVE_TASKFILE:
1076 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
1077 return -EACCES;
1078 switch(drive->media) {
1079 case ide_disk:
1080 return ide_taskfile_ioctl(drive, cmd, arg);
1081 default:
1082 return -ENOMSG;
1083 }
1084 #endif /* CONFIG_IDE_TASK_IOCTL */
1085
1086 case HDIO_DRIVE_CMD:
1087 if (!capable(CAP_SYS_RAWIO))
1088 return -EACCES;
1089 return ide_cmd_ioctl(drive, cmd, arg);
1090
1091 case HDIO_DRIVE_TASK:
1092 if (!capable(CAP_SYS_RAWIO))
1093 return -EACCES;
1094 return ide_task_ioctl(drive, cmd, arg);
1095
1096 case HDIO_SCAN_HWIF:
1097 {
1098 hw_regs_t hw;
1099 int args[3];
1100 if (!capable(CAP_SYS_RAWIO)) return -EACCES;
1101 if (copy_from_user(args, p, 3 * sizeof(int)))
1102 return -EFAULT;
1103 memset(&hw, 0, sizeof(hw));
1104 ide_init_hwif_ports(&hw, (unsigned long) args[0],
1105 (unsigned long) args[1], NULL);
1106 hw.irq = args[2];
1107 if (ide_register_hw(&hw, 0, NULL) == -1)
1108 return -EIO;
1109 return 0;
1110 }
1111 case HDIO_UNREGISTER_HWIF:
1112 if (!capable(CAP_SYS_RAWIO)) return -EACCES;
1113 /* (arg > MAX_HWIFS) checked in function */
1114 ide_unregister(arg);
1115 return 0;
1116 case HDIO_SET_NICE:
1117 if (!capable(CAP_SYS_ADMIN)) return -EACCES;
1118 if (arg != (arg & ((1 << IDE_NICE_DSC_OVERLAP) | (1 << IDE_NICE_1))))
1119 return -EPERM;
1120 drive->dsc_overlap = (arg >> IDE_NICE_DSC_OVERLAP) & 1;
1121 drv = *(ide_driver_t **)bdev->bd_disk->private_data;
1122 if (drive->dsc_overlap && !drv->supports_dsc_overlap) {
1123 drive->dsc_overlap = 0;
1124 return -EPERM;
1125 }
1126 drive->nice1 = (arg >> IDE_NICE_1) & 1;
1127 return 0;
1128 case HDIO_DRIVE_RESET:
1129 {
1130 unsigned long flags;
1131 if (!capable(CAP_SYS_ADMIN)) return -EACCES;
1132
1133 /*
1134 * Abort the current command on the
1135 * group if there is one, taking
1136 * care not to allow anything else
1137 * to be queued and to die on the
1138 * spot if we miss one somehow
1139 */
1140
1141 spin_lock_irqsave(&ide_lock, flags);
1142
1143 if (HWGROUP(drive)->resetting) {
1144 spin_unlock_irqrestore(&ide_lock, flags);
1145 return -EBUSY;
1146 }
1147
1148 ide_abort(drive, "drive reset");
1149
1150 BUG_ON(HWGROUP(drive)->handler);
1151
1152 /* Ensure nothing gets queued after we
1153 drop the lock. Reset will clear the busy */
1154
1155 HWGROUP(drive)->busy = 1;
1156 spin_unlock_irqrestore(&ide_lock, flags);
1157 (void) ide_do_reset(drive);
1158
1159 return 0;
1160 }
1161
1162 case CDROMEJECT:
1163 case CDROMCLOSETRAY:
1164 return scsi_cmd_ioctl(file, bdev->bd_disk, cmd, p);
1165
1166 case HDIO_GET_BUSSTATE:
1167 if (!capable(CAP_SYS_ADMIN))
1168 return -EACCES;
1169 if (put_user(HWIF(drive)->bus_state, (long __user *)arg))
1170 return -EFAULT;
1171 return 0;
1172
1173 case HDIO_SET_BUSSTATE:
1174 if (!capable(CAP_SYS_ADMIN))
1175 return -EACCES;
1176 if (HWIF(drive)->busproc)
1177 return HWIF(drive)->busproc(drive, (int)arg);
1178 return -EOPNOTSUPP;
1179 default:
1180 return -EINVAL;
1181 }
1182
1183 read_val:
1184 down(&ide_setting_sem);
1185 spin_lock_irqsave(&ide_lock, flags);
1186 err = *val;
1187 spin_unlock_irqrestore(&ide_lock, flags);
1188 up(&ide_setting_sem);
1189 return err >= 0 ? put_user(err, (long __user *)arg) : err;
1190
1191 set_val:
1192 if (bdev != bdev->bd_contains)
1193 err = -EINVAL;
1194 else {
1195 if (!capable(CAP_SYS_ADMIN))
1196 err = -EACCES;
1197 else {
1198 down(&ide_setting_sem);
1199 err = setfunc(drive, arg);
1200 up(&ide_setting_sem);
1201 }
1202 }
1203 return err;
1204 }
1205
1206 EXPORT_SYMBOL(generic_ide_ioctl);
1207
1208 /*
1209 * stridx() returns the offset of c within s,
1210 * or -1 if c is '\0' or not found within s.
1211 */
1212 static int __init stridx (const char *s, char c)
1213 {
1214 char *i = strchr(s, c);
1215 return (i && c) ? i - s : -1;
1216 }
1217
1218 /*
1219 * match_parm() does parsing for ide_setup():
1220 *
1221 * 1. the first char of s must be '='.
1222 * 2. if the remainder matches one of the supplied keywords,
1223 * the index (1 based) of the keyword is negated and returned.
1224 * 3. if the remainder is a series of no more than max_vals numbers
1225 * separated by commas, the numbers are saved in vals[] and a
1226 * count of how many were saved is returned. Base10 is assumed,
1227 * and base16 is allowed when prefixed with "0x".
1228 * 4. otherwise, zero is returned.
1229 */
1230 static int __init match_parm (char *s, const char *keywords[], int vals[], int max_vals)
1231 {
1232 static const char *decimal = "0123456789";
1233 static const char *hex = "0123456789abcdef";
1234 int i, n;
1235
1236 if (*s++ == '=') {
1237 /*
1238 * Try matching against the supplied keywords,
1239 * and return -(index+1) if we match one
1240 */
1241 if (keywords != NULL) {
1242 for (i = 0; *keywords != NULL; ++i) {
1243 if (!strcmp(s, *keywords++))
1244 return -(i+1);
1245 }
1246 }
1247 /*
1248 * Look for a series of no more than "max_vals"
1249 * numeric values separated by commas, in base10,
1250 * or base16 when prefixed with "0x".
1251 * Return a count of how many were found.
1252 */
1253 for (n = 0; (i = stridx(decimal, *s)) >= 0;) {
1254 vals[n] = i;
1255 while ((i = stridx(decimal, *++s)) >= 0)
1256 vals[n] = (vals[n] * 10) + i;
1257 if (*s == 'x' && !vals[n]) {
1258 while ((i = stridx(hex, *++s)) >= 0)
1259 vals[n] = (vals[n] * 0x10) + i;
1260 }
1261 if (++n == max_vals)
1262 break;
1263 if (*s == ',' || *s == ';')
1264 ++s;
1265 }
1266 if (!*s)
1267 return n;
1268 }
1269 return 0; /* zero = nothing matched */
1270 }
1271
1272 #ifdef CONFIG_BLK_DEV_ALI14XX
1273 extern int probe_ali14xx;
1274 extern int ali14xx_init(void);
1275 #endif
1276 #ifdef CONFIG_BLK_DEV_UMC8672
1277 extern int probe_umc8672;
1278 extern int umc8672_init(void);
1279 #endif
1280 #ifdef CONFIG_BLK_DEV_DTC2278
1281 extern int probe_dtc2278;
1282 extern int dtc2278_init(void);
1283 #endif
1284 #ifdef CONFIG_BLK_DEV_HT6560B
1285 extern int probe_ht6560b;
1286 extern int ht6560b_init(void);
1287 #endif
1288 #ifdef CONFIG_BLK_DEV_QD65XX
1289 extern int probe_qd65xx;
1290 extern int qd65xx_init(void);
1291 #endif
1292
1293 static int __initdata is_chipset_set[MAX_HWIFS];
1294
1295 /*
1296 * ide_setup() gets called VERY EARLY during initialization,
1297 * to handle kernel "command line" strings beginning with "hdx=" or "ide".
1298 *
1299 * Remember to update Documentation/ide.txt if you change something here.
1300 */
1301 static int __init ide_setup(char *s)
1302 {
1303 int i, vals[3];
1304 ide_hwif_t *hwif;
1305 ide_drive_t *drive;
1306 unsigned int hw, unit;
1307 const char max_drive = 'a' + ((MAX_HWIFS * MAX_DRIVES) - 1);
1308 const char max_hwif = '0' + (MAX_HWIFS - 1);
1309
1310
1311 if (strncmp(s,"hd",2) == 0 && s[2] == '=') /* hd= is for hd.c */
1312 return 0; /* driver and not us */
1313
1314 if (strncmp(s,"ide",3) && strncmp(s,"idebus",6) && strncmp(s,"hd",2))
1315 return 0;
1316
1317 printk(KERN_INFO "ide_setup: %s", s);
1318 init_ide_data ();
1319
1320 #ifdef CONFIG_BLK_DEV_IDEDOUBLER
1321 if (!strcmp(s, "ide=doubler")) {
1322 extern int ide_doubler;
1323
1324 printk(" : Enabled support for IDE doublers\n");
1325 ide_doubler = 1;
1326 return 1;
1327 }
1328 #endif /* CONFIG_BLK_DEV_IDEDOUBLER */
1329
1330 if (!strcmp(s, "ide=nodma")) {
1331 printk(" : Prevented DMA\n");
1332 noautodma = 1;
1333 return 1;
1334 }
1335
1336 #ifdef CONFIG_IDEPCI_PCIBUS_ORDER
1337 if (!strcmp(s, "ide=reverse")) {
1338 ide_scan_direction = 1;
1339 printk(" : Enabled support for IDE inverse scan order.\n");
1340 return 1;
1341 }
1342 #endif
1343
1344 #ifdef CONFIG_BLK_DEV_IDEACPI
1345 if (!strcmp(s, "ide=noacpi")) {
1346 //printk(" : Disable IDE ACPI support.\n");
1347 ide_noacpi = 1;
1348 return 1;
1349 }
1350 if (!strcmp(s, "ide=acpigtf")) {
1351 //printk(" : Enable IDE ACPI _GTF support.\n");
1352 ide_noacpitfs = 0;
1353 return 1;
1354 }
1355 if (!strcmp(s, "ide=acpionboot")) {
1356 //printk(" : Call IDE ACPI methods on boot.\n");
1357 ide_noacpionboot = 0;
1358 return 1;
1359 }
1360 #endif /* CONFIG_BLK_DEV_IDEACPI */
1361
1362 /*
1363 * Look for drive options: "hdx="
1364 */
1365 if (s[0] == 'h' && s[1] == 'd' && s[2] >= 'a' && s[2] <= max_drive) {
1366 const char *hd_words[] = {
1367 "none", "noprobe", "nowerr", "cdrom", "minus5",
1368 "autotune", "noautotune", "minus8", "swapdata", "bswap",
1369 "noflush", "remap", "remap63", "scsi", NULL };
1370 unit = s[2] - 'a';
1371 hw = unit / MAX_DRIVES;
1372 unit = unit % MAX_DRIVES;
1373 hwif = &ide_hwifs[hw];
1374 drive = &hwif->drives[unit];
1375 if (strncmp(s + 4, "ide-", 4) == 0) {
1376 strlcpy(drive->driver_req, s + 4, sizeof(drive->driver_req));
1377 goto done;
1378 }
1379 switch (match_parm(&s[3], hd_words, vals, 3)) {
1380 case -1: /* "none" */
1381 case -2: /* "noprobe" */
1382 drive->noprobe = 1;
1383 goto done;
1384 case -3: /* "nowerr" */
1385 drive->bad_wstat = BAD_R_STAT;
1386 hwif->noprobe = 0;
1387 goto done;
1388 case -4: /* "cdrom" */
1389 drive->present = 1;
1390 drive->media = ide_cdrom;
1391 /* an ATAPI device ignores DRDY */
1392 drive->ready_stat = 0;
1393 hwif->noprobe = 0;
1394 goto done;
1395 case -6: /* "autotune" */
1396 drive->autotune = IDE_TUNE_AUTO;
1397 goto obsolete_option;
1398 case -7: /* "noautotune" */
1399 drive->autotune = IDE_TUNE_NOAUTO;
1400 goto obsolete_option;
1401 case -9: /* "swapdata" */
1402 case -10: /* "bswap" */
1403 drive->bswap = 1;
1404 goto done;
1405 case -11: /* noflush */
1406 drive->noflush = 1;
1407 goto done;
1408 case -12: /* "remap" */
1409 drive->remap_0_to_1 = 1;
1410 goto done;
1411 case -13: /* "remap63" */
1412 drive->sect0 = 63;
1413 goto done;
1414 case -14: /* "scsi" */
1415 drive->scsi = 1;
1416 goto done;
1417 case 3: /* cyl,head,sect */
1418 drive->media = ide_disk;
1419 drive->ready_stat = READY_STAT;
1420 drive->cyl = drive->bios_cyl = vals[0];
1421 drive->head = drive->bios_head = vals[1];
1422 drive->sect = drive->bios_sect = vals[2];
1423 drive->present = 1;
1424 drive->forced_geom = 1;
1425 hwif->noprobe = 0;
1426 goto done;
1427 default:
1428 goto bad_option;
1429 }
1430 }
1431
1432 if (s[0] != 'i' || s[1] != 'd' || s[2] != 'e')
1433 goto bad_option;
1434 /*
1435 * Look for bus speed option: "idebus="
1436 */
1437 if (s[3] == 'b' && s[4] == 'u' && s[5] == 's') {
1438 if (match_parm(&s[6], NULL, vals, 1) != 1)
1439 goto bad_option;
1440 if (vals[0] >= 20 && vals[0] <= 66) {
1441 idebus_parameter = vals[0];
1442 } else
1443 printk(" -- BAD BUS SPEED! Expected value from 20 to 66");
1444 goto done;
1445 }
1446 /*
1447 * Look for interface options: "idex="
1448 */
1449 if (s[3] >= '0' && s[3] <= max_hwif) {
1450 /*
1451 * Be VERY CAREFUL changing this: note hardcoded indexes below
1452 * (-8, -9, -10) are reserved to ease the hardcoding.
1453 */
1454 static const char *ide_words[] = {
1455 "noprobe", "serialize", "minus3", "minus4",
1456 "reset", "dma", "ata66", "minus8", "minus9",
1457 "minus10", "four", "qd65xx", "ht6560b", "cmd640_vlb",
1458 "dtc2278", "umc8672", "ali14xx", NULL };
1459 hw = s[3] - '0';
1460 hwif = &ide_hwifs[hw];
1461 i = match_parm(&s[4], ide_words, vals, 3);
1462
1463 /*
1464 * Cryptic check to ensure chipset not already set for hwif.
1465 * Note: we can't depend on hwif->chipset here.
1466 */
1467 if ((i >= -18 && i <= -11) || (i > 0 && i <= 3)) {
1468 /* chipset already specified */
1469 if (is_chipset_set[hw])
1470 goto bad_option;
1471 if (i > -18 && i <= -11) {
1472 /* these drivers are for "ide0=" only */
1473 if (hw != 0)
1474 goto bad_hwif;
1475 /* chipset already specified for 2nd port */
1476 if (is_chipset_set[hw+1])
1477 goto bad_option;
1478 }
1479 is_chipset_set[hw] = 1;
1480 printk("\n");
1481 }
1482
1483 switch (i) {
1484 #ifdef CONFIG_BLK_DEV_ALI14XX
1485 case -17: /* "ali14xx" */
1486 probe_ali14xx = 1;
1487 goto done;
1488 #endif
1489 #ifdef CONFIG_BLK_DEV_UMC8672
1490 case -16: /* "umc8672" */
1491 probe_umc8672 = 1;
1492 goto done;
1493 #endif
1494 #ifdef CONFIG_BLK_DEV_DTC2278
1495 case -15: /* "dtc2278" */
1496 probe_dtc2278 = 1;
1497 goto done;
1498 #endif
1499 #ifdef CONFIG_BLK_DEV_CMD640
1500 case -14: /* "cmd640_vlb" */
1501 {
1502 extern int cmd640_vlb; /* flag for cmd640.c */
1503 cmd640_vlb = 1;
1504 goto done;
1505 }
1506 #endif
1507 #ifdef CONFIG_BLK_DEV_HT6560B
1508 case -13: /* "ht6560b" */
1509 probe_ht6560b = 1;
1510 goto done;
1511 #endif
1512 #ifdef CONFIG_BLK_DEV_QD65XX
1513 case -12: /* "qd65xx" */
1514 probe_qd65xx = 1;
1515 goto done;
1516 #endif
1517 #ifdef CONFIG_BLK_DEV_4DRIVES
1518 case -11: /* "four" drives on one set of ports */
1519 {
1520 ide_hwif_t *mate = &ide_hwifs[hw^1];
1521 mate->drives[0].select.all ^= 0x20;
1522 mate->drives[1].select.all ^= 0x20;
1523 hwif->chipset = mate->chipset = ide_4drives;
1524 mate->irq = hwif->irq;
1525 memcpy(mate->io_ports, hwif->io_ports, sizeof(hwif->io_ports));
1526 hwif->mate = mate;
1527 mate->mate = hwif;
1528 hwif->serialized = mate->serialized = 1;
1529 goto obsolete_option;
1530 }
1531 #endif /* CONFIG_BLK_DEV_4DRIVES */
1532 case -10: /* minus10 */
1533 case -9: /* minus9 */
1534 case -8: /* minus8 */
1535 case -4:
1536 case -3:
1537 goto bad_option;
1538 case -7: /* ata66 */
1539 #ifdef CONFIG_BLK_DEV_IDEPCI
1540 hwif->udma_four = 1;
1541 goto obsolete_option;
1542 #else
1543 goto bad_hwif;
1544 #endif
1545 case -6: /* dma */
1546 hwif->autodma = 1;
1547 goto obsolete_option;
1548 case -5: /* "reset" */
1549 hwif->reset = 1;
1550 goto obsolete_option;
1551 case -2: /* "serialize" */
1552 hwif->mate = &ide_hwifs[hw^1];
1553 hwif->mate->mate = hwif;
1554 hwif->serialized = hwif->mate->serialized = 1;
1555 goto obsolete_option;
1556
1557 case -1: /* "noprobe" */
1558 hwif->noprobe = 1;
1559 goto done;
1560
1561 case 1: /* base */
1562 vals[1] = vals[0] + 0x206; /* default ctl */
1563 case 2: /* base,ctl */
1564 vals[2] = 0; /* default irq = probe for it */
1565 case 3: /* base,ctl,irq */
1566 hwif->hw.irq = vals[2];
1567 ide_init_hwif_ports(&hwif->hw, (unsigned long) vals[0], (unsigned long) vals[1], &hwif->irq);
1568 memcpy(hwif->io_ports, hwif->hw.io_ports, sizeof(hwif->io_ports));
1569 hwif->irq = vals[2];
1570 hwif->noprobe = 0;
1571 hwif->chipset = ide_forced;
1572 goto obsolete_option;
1573
1574 case 0: goto bad_option;
1575 default:
1576 printk(" -- SUPPORT NOT CONFIGURED IN THIS KERNEL\n");
1577 return 1;
1578 }
1579 }
1580 bad_option:
1581 printk(" -- BAD OPTION\n");
1582 return 1;
1583 obsolete_option:
1584 printk(" -- OBSOLETE OPTION, WILL BE REMOVED SOON!\n");
1585 return 1;
1586 bad_hwif:
1587 printk("-- NOT SUPPORTED ON ide%d", hw);
1588 done:
1589 printk("\n");
1590 return 1;
1591 }
1592
1593 extern void __init pnpide_init(void);
1594 extern void __exit pnpide_exit(void);
1595 extern void __init h8300_ide_init(void);
1596
1597 /*
1598 * probe_for_hwifs() finds/initializes "known" IDE interfaces
1599 */
1600 static void __init probe_for_hwifs (void)
1601 {
1602 #ifdef CONFIG_IDEPCI_PCIBUS_ORDER
1603 ide_scan_pcibus(ide_scan_direction);
1604 #endif
1605
1606 #ifdef CONFIG_ETRAX_IDE
1607 {
1608 extern void init_e100_ide(void);
1609 init_e100_ide();
1610 }
1611 #endif /* CONFIG_ETRAX_IDE */
1612 #ifdef CONFIG_BLK_DEV_CMD640
1613 {
1614 extern void ide_probe_for_cmd640x(void);
1615 ide_probe_for_cmd640x();
1616 }
1617 #endif /* CONFIG_BLK_DEV_CMD640 */
1618 #ifdef CONFIG_BLK_DEV_IDE_PMAC
1619 {
1620 extern int pmac_ide_probe(void);
1621 (void)pmac_ide_probe();
1622 }
1623 #endif /* CONFIG_BLK_DEV_IDE_PMAC */
1624 #ifdef CONFIG_BLK_DEV_GAYLE
1625 {
1626 extern void gayle_init(void);
1627 gayle_init();
1628 }
1629 #endif /* CONFIG_BLK_DEV_GAYLE */
1630 #ifdef CONFIG_BLK_DEV_FALCON_IDE
1631 {
1632 extern void falconide_init(void);
1633 falconide_init();
1634 }
1635 #endif /* CONFIG_BLK_DEV_FALCON_IDE */
1636 #ifdef CONFIG_BLK_DEV_MAC_IDE
1637 {
1638 extern void macide_init(void);
1639 macide_init();
1640 }
1641 #endif /* CONFIG_BLK_DEV_MAC_IDE */
1642 #ifdef CONFIG_BLK_DEV_Q40IDE
1643 {
1644 extern void q40ide_init(void);
1645 q40ide_init();
1646 }
1647 #endif /* CONFIG_BLK_DEV_Q40IDE */
1648 #ifdef CONFIG_BLK_DEV_BUDDHA
1649 {
1650 extern void buddha_init(void);
1651 buddha_init();
1652 }
1653 #endif /* CONFIG_BLK_DEV_BUDDHA */
1654 #ifdef CONFIG_BLK_DEV_IDEPNP
1655 pnpide_init();
1656 #endif
1657 #ifdef CONFIG_H8300
1658 h8300_ide_init();
1659 #endif
1660 }
1661
1662 /*
1663 * Probe module
1664 */
1665
1666 EXPORT_SYMBOL(ide_lock);
1667
1668 static int ide_bus_match(struct device *dev, struct device_driver *drv)
1669 {
1670 return 1;
1671 }
1672
1673 static char *media_string(ide_drive_t *drive)
1674 {
1675 switch (drive->media) {
1676 case ide_disk:
1677 return "disk";
1678 case ide_cdrom:
1679 return "cdrom";
1680 case ide_tape:
1681 return "tape";
1682 case ide_floppy:
1683 return "floppy";
1684 case ide_optical:
1685 return "optical";
1686 default:
1687 return "UNKNOWN";
1688 }
1689 }
1690
1691 static ssize_t media_show(struct device *dev, struct device_attribute *attr, char *buf)
1692 {
1693 ide_drive_t *drive = to_ide_device(dev);
1694 return sprintf(buf, "%s\n", media_string(drive));
1695 }
1696
1697 static ssize_t drivename_show(struct device *dev, struct device_attribute *attr, char *buf)
1698 {
1699 ide_drive_t *drive = to_ide_device(dev);
1700 return sprintf(buf, "%s\n", drive->name);
1701 }
1702
1703 static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf)
1704 {
1705 ide_drive_t *drive = to_ide_device(dev);
1706 return sprintf(buf, "ide:m-%s\n", media_string(drive));
1707 }
1708
1709 static struct device_attribute ide_dev_attrs[] = {
1710 __ATTR_RO(media),
1711 __ATTR_RO(drivename),
1712 __ATTR_RO(modalias),
1713 __ATTR_NULL
1714 };
1715
1716 static int ide_uevent(struct device *dev, char **envp, int num_envp,
1717 char *buffer, int buffer_size)
1718 {
1719 ide_drive_t *drive = to_ide_device(dev);
1720 int i = 0;
1721 int length = 0;
1722
1723 add_uevent_var(envp, num_envp, &i, buffer, buffer_size, &length,
1724 "MEDIA=%s", media_string(drive));
1725 add_uevent_var(envp, num_envp, &i, buffer, buffer_size, &length,
1726 "DRIVENAME=%s", drive->name);
1727 add_uevent_var(envp, num_envp, &i, buffer, buffer_size, &length,
1728 "MODALIAS=ide:m-%s", media_string(drive));
1729 envp[i] = NULL;
1730 return 0;
1731 }
1732
1733 static int generic_ide_probe(struct device *dev)
1734 {
1735 ide_drive_t *drive = to_ide_device(dev);
1736 ide_driver_t *drv = to_ide_driver(dev->driver);
1737
1738 return drv->probe ? drv->probe(drive) : -ENODEV;
1739 }
1740
1741 static int generic_ide_remove(struct device *dev)
1742 {
1743 ide_drive_t *drive = to_ide_device(dev);
1744 ide_driver_t *drv = to_ide_driver(dev->driver);
1745
1746 if (drv->remove)
1747 drv->remove(drive);
1748
1749 return 0;
1750 }
1751
1752 static void generic_ide_shutdown(struct device *dev)
1753 {
1754 ide_drive_t *drive = to_ide_device(dev);
1755 ide_driver_t *drv = to_ide_driver(dev->driver);
1756
1757 if (dev->driver && drv->shutdown)
1758 drv->shutdown(drive);
1759 }
1760
1761 struct bus_type ide_bus_type = {
1762 .name = "ide",
1763 .match = ide_bus_match,
1764 .uevent = ide_uevent,
1765 .probe = generic_ide_probe,
1766 .remove = generic_ide_remove,
1767 .shutdown = generic_ide_shutdown,
1768 .dev_attrs = ide_dev_attrs,
1769 .suspend = generic_ide_suspend,
1770 .resume = generic_ide_resume,
1771 };
1772
1773 EXPORT_SYMBOL_GPL(ide_bus_type);
1774
1775 /*
1776 * This is gets invoked once during initialization, to set *everything* up
1777 */
1778 static int __init ide_init(void)
1779 {
1780 int ret;
1781
1782 printk(KERN_INFO "Uniform Multi-Platform E-IDE driver " REVISION "\n");
1783 system_bus_speed = ide_system_bus_speed();
1784
1785 ret = bus_register(&ide_bus_type);
1786 if (ret < 0) {
1787 printk(KERN_WARNING "IDE: bus_register error: %d\n", ret);
1788 return ret;
1789 }
1790
1791 init_ide_data();
1792
1793 proc_ide_create();
1794
1795 #ifdef CONFIG_BLK_DEV_ALI14XX
1796 if (probe_ali14xx)
1797 (void)ali14xx_init();
1798 #endif
1799 #ifdef CONFIG_BLK_DEV_UMC8672
1800 if (probe_umc8672)
1801 (void)umc8672_init();
1802 #endif
1803 #ifdef CONFIG_BLK_DEV_DTC2278
1804 if (probe_dtc2278)
1805 (void)dtc2278_init();
1806 #endif
1807 #ifdef CONFIG_BLK_DEV_HT6560B
1808 if (probe_ht6560b)
1809 (void)ht6560b_init();
1810 #endif
1811 #ifdef CONFIG_BLK_DEV_QD65XX
1812 if (probe_qd65xx)
1813 (void)qd65xx_init();
1814 #endif
1815
1816 /* Probe for special PCI and other "known" interface chipsets. */
1817 probe_for_hwifs();
1818
1819 return 0;
1820 }
1821
1822 #ifdef MODULE
1823 static char *options = NULL;
1824 module_param(options, charp, 0);
1825 MODULE_LICENSE("GPL");
1826
1827 static void __init parse_options (char *line)
1828 {
1829 char *next = line;
1830
1831 if (line == NULL || !*line)
1832 return;
1833 while ((line = next) != NULL) {
1834 if ((next = strchr(line,' ')) != NULL)
1835 *next++ = 0;
1836 if (!ide_setup(line))
1837 printk (KERN_INFO "Unknown option '%s'\n", line);
1838 }
1839 }
1840
1841 int __init init_module (void)
1842 {
1843 parse_options(options);
1844 return ide_init();
1845 }
1846
1847 void __exit cleanup_module (void)
1848 {
1849 int index;
1850
1851 for (index = 0; index < MAX_HWIFS; ++index)
1852 ide_unregister(index);
1853
1854 #ifdef CONFIG_BLK_DEV_IDEPNP
1855 pnpide_exit();
1856 #endif
1857
1858 proc_ide_destroy();
1859
1860 bus_unregister(&ide_bus_type);
1861 }
1862
1863 #else /* !MODULE */
1864
1865 __setup("", ide_setup);
1866
1867 module_init(ide_init);
1868
1869 #endif /* MODULE */
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