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[deliverable/linux.git] / drivers / ide / ide.c
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1da177e4
LT		 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
1da177e4
LT		 129#define _IDE_C /* Tell ide.h it's really us */
130
1da177e4
LT		 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>
1da177e4
LT		 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
163static 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
169static int idebus_parameter; /* holds the "idebus=" parameter */
170static int system_bus_speed; /* holds what we think is VESA/PCI bus speed */
1da177e4
LT		 171
172DECLARE_MUTEX(ide_cfg_sem);
173 __cacheline_aligned_in_smp DEFINE_SPINLOCK(ide_lock);
174
6d208b39 175#ifdef CONFIG_IDEPCI_PCIBUS_ORDER
1da177e4
LT		 176static int ide_scan_direction; /* THIS was formerly 2.2.x pci=reverse */
177#endif
178
1da177e4 179int noautodma = 0;
1da177e4
LT		 180
181EXPORT_SYMBOL(noautodma);
182
e3a59b4d
HR		 183#ifdef CONFIG_BLK_DEV_IDEACPI
184int ide_noacpi = 0;
185int ide_noacpitfs = 1;
186int ide_noacpionboot = 1;
187#endif
188
1da177e4
LT		 189/*
190 * This is declared extern in ide.h, for access by other IDE modules:
191 */
192ide_hwif_t ide_hwifs[MAX_HWIFS]; /* master data repository */
193
194EXPORT_SYMBOL(ide_hwifs);
195
1da177e4
LT		 196/*
197 * Do not even *think* about calling this!
198 */
199static 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 */
1da177e4 218
f36d4024 219 init_completion(&hwif->gendev_rel_comp);
1da177e4
LT		 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;
1da177e4
LT		 239 drive->vdma = 0;
240 INIT_LIST_HEAD(&drive->list);
f36d4024 241 init_completion(&drive->gendev_rel_comp);
1da177e4
LT		 242 }
243}
244
245static 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
263extern 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
283static 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
1da177e4 304 ide_arm_init();
1da177e4
LT		 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
321static 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
1da177e4
LT		 350static 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
371int ide_hwif_request_regions(ide_hwif_t *hwif)
372{
373 unsigned long addr;
374 unsigned int i;
375
2ad1e558 376 if (hwif->mmio)
1da177e4 377 return 0;
1da177e4
LT		 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
399data_region_busy:
400 addr = hwif->io_ports[IDE_CONTROL_OFFSET];
401 if (addr)
402 release_region(addr, 1);
403control_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
420void ide_hwif_release_regions(ide_hwif_t *hwif)
421{
422 u32 i = 0;
423
2ad1e558 424 if (hwif->mmio)
1da177e4
LT		 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 *
020e322d 442 * Restore hwif to a previous state by copying most settings
1da177e4
LT		 443 * from the template.
444 */
445
446static 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;
2d5eaa6d 473 hwif->udma_filter = tmp_hwif->udma_filter;
1da177e4
LT		 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;
7469aaf6 494 hwif->dma_off_quietly = tmp_hwif->dma_off_quietly;
1da177e4 495 hwif->ide_dma_test_irq = tmp_hwif->ide_dma_test_irq;
f0dd8712 496 hwif->ide_dma_clear_irq = tmp_hwif->ide_dma_clear_irq;
ccf35289 497 hwif->dma_host_on = tmp_hwif->dma_host_on;
7469aaf6 498 hwif->dma_host_off = tmp_hwif->dma_host_off;
1da177e4
LT		 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;
1da177e4
LT		 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;
1da177e4
LT		 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
1da177e4
LT		 531 hwif->config_data = tmp_hwif->config_data;
532 hwif->select_data = tmp_hwif->select_data;
020e322d
SS		 533 hwif->extra_base = tmp_hwif->extra_base;
534 hwif->extra_ports = tmp_hwif->extra_ports;
1da177e4
LT		 535 hwif->autodma = tmp_hwif->autodma;
536 hwif->udma_four = tmp_hwif->udma_four;
1da177e4
LT		 537
538 hwif->hwif_data = tmp_hwif->hwif_data;
539}
540
541/**
020e322d 542 * ide_unregister - free an IDE interface
1da177e4
LT		 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
020e322d
SS		 555 * the interface will not be reopened (present/vanishing locking
556 * isn't yet done BTW). After we commit to the final kill we
1da177e4
LT		 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
563void 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;
8604affd 569 int irq_count = 0, unit;
1da177e4
LT		 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];
94f6c59d 582 if (!drive->present)
1da177e4 583 continue;
8604affd
BZ		 584 spin_unlock_irq(&ide_lock);
585 device_unregister(&drive->gendev);
f36d4024 586 wait_for_completion(&drive->gendev_rel_comp);
8604affd 587 spin_lock_irq(&ide_lock);
1da177e4
LT		 588 }
589 hwif->present = 0;
590
591 spin_unlock_irq(&ide_lock);
592
5cbf79cd 593 ide_proc_unregister_port(hwif);
1da177e4
LT		 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 */
1da177e4
LT		 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);
f36d4024 646 wait_for_completion(&hwif->gendev_rel_comp);
1da177e4
LT		 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;
020e322d
SS		 666
667 hwif->extra_base = 0;
668 hwif->extra_ports = 0;
1da177e4
LT		 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
680abort:
681 spin_unlock_irq(&ide_lock);
682 up(&ide_cfg_sem);
683}
684
685EXPORT_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
703void 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
2c3e0262 714 memset(hw, 0, sizeof(hw_regs_t));
1da177e4
LT		 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
869c56ee 745 * @initializing: set while initializing built-in drivers
1da177e4
LT		 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
869c56ee
BZ		 755int ide_register_hw_with_fixup(hw_regs_t *hw, int initializing,
756 ide_hwif_t **hwifp,
757 void(*fixup)(ide_hwif_t *hwif))
1da177e4
LT		 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;
780found:
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;
4349d5cd 794 hwif->gendev.parent = hw->dev;
1da177e4
LT		 795
796 if (!initializing) {
797 probe_hwif_init_with_fixup(hwif, fixup);
5cbf79cd 798 ide_proc_register_port(hwif);
1da177e4
LT		 799 }
800
801 if (hwifp)
802 *hwifp = hwif;
803
804 return (initializing || hwif->present) ? index : -1;
805}
806
807EXPORT_SYMBOL(ide_register_hw_with_fixup);
808
869c56ee 809int ide_register_hw(hw_regs_t *hw, int initializing, ide_hwif_t **hwifp)
1da177e4 810{
869c56ee 811 return ide_register_hw_with_fixup(hw, initializing, hwifp, NULL);
1da177e4
LT		 812}
813
814EXPORT_SYMBOL(ide_register_hw);
815
816/*
817 * Locks for IDE setting functionality
818 */
819
820DECLARE_MUTEX(ide_setting_sem);
821
1497943e
BZ		 822EXPORT_SYMBOL_GPL(ide_setting_sem);
823
1da177e4
LT		 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
833int 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
855EXPORT_SYMBOL(ide_spin_wait_hwgroup);
856
7662d046 857int set_io_32bit(ide_drive_t *drive, int arg)
1da177e4 858{
1497943e
BZ		 859 if (drive->no_io_32bit)
860 return -EPERM;
861
862 if (arg < 0 || arg > 1 + (SUPPORT_VLB_SYNC << 1))
863 return -EINVAL;
864
1da177e4
LT		 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
1497943e
BZ		 873static 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
7662d046 886int set_using_dma(ide_drive_t *drive, int arg)
1da177e4
LT		 887{
888#ifdef CONFIG_BLK_DEV_IDEDMA
87996204
BZ		 889 ide_hwif_t *hwif = drive->hwif;
890 int err = -EPERM;
891
1497943e
BZ		 892 if (arg < 0 || arg > 1)
893 return -EINVAL;
894
1da177e4 895 if (!drive->id || !(drive->id->capability & 1))
87996204
BZ		 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
1da177e4 912 if (arg) {
793a9722 913 hwif->dma_off_quietly(drive);
87996204
BZ		 914 if (ide_set_dma(drive) || hwif->ide_dma_on(drive))
915 err = -EIO;
7469aaf6
BZ		 916 } else
917 ide_dma_off(drive);
87996204
BZ		 918
919 /*
920 * lock, clear ->busy flag and unlock before leaving
921 */
922 spin_lock_irq(&ide_lock);
923 hwif->hwgroup->busy = 0;
924 spin_unlock_irq(&ide_lock);
925out:
926 return err;
1da177e4 927#else
1497943e
BZ		 928 if (arg < 0 || arg > 1)
929 return -EINVAL;
930
1da177e4
LT		 931 return -EPERM;
932#endif
933}
934
7662d046 935int set_pio_mode(ide_drive_t *drive, int arg)
1da177e4
LT		 936{
937 struct request rq;
938
1497943e
BZ		 939 if (arg < 0 || arg > 255)
940 return -EINVAL;
941
1da177e4
LT		 942 if (!HWIF(drive)->tuneproc)
943 return -ENOSYS;
944 if (drive->special.b.set_tune)
945 return -EBUSY;
946 ide_init_drive_cmd(&rq);
947 drive->tune_req = (u8) arg;
948 drive->special.b.set_tune = 1;
949 (void) ide_do_drive_cmd(drive, &rq, ide_wait);
950 return 0;
951}
952
1497943e
BZ		 953static int set_unmaskirq(ide_drive_t *drive, int arg)
954{
955 if (drive->no_unmask)
956 return -EPERM;
957
958 if (arg < 0 || arg > 1)
959 return -EINVAL;
960
961 if (ide_spin_wait_hwgroup(drive))
962 return -EBUSY;
963 drive->unmask = arg;
964 spin_unlock_irq(&ide_lock);
965
966 return 0;
967}
968
1da177e4
LT		 969/**
970 * system_bus_clock - clock guess
971 *
972 * External version of the bus clock guess used by very old IDE drivers
973 * for things like VLB timings. Should not be used.
974 */
975
976int system_bus_clock (void)
977{
978 return((int) ((!system_bus_speed) ? ide_system_bus_speed() : system_bus_speed ));
979}
980
981EXPORT_SYMBOL(system_bus_clock);
982
b887d2e6 983static int generic_ide_suspend(struct device *dev, pm_message_t mesg)
1da177e4
LT		 984{
985 ide_drive_t *drive = dev->driver_data;
e3a59b4d 986 ide_hwif_t *hwif = HWIF(drive);
1da177e4
LT		 987 struct request rq;
988 struct request_pm_state rqpm;
989 ide_task_t args;
990
e3a59b4d
HR		 991 /* Call ACPI _GTM only once */
992 if (!(drive->dn % 2))
993 ide_acpi_get_timing(hwif);
994
1da177e4
LT		 995 memset(&rq, 0, sizeof(rq));
996 memset(&rqpm, 0, sizeof(rqpm));
997 memset(&args, 0, sizeof(args));
4aff5e23 998 rq.cmd_type = REQ_TYPE_PM_SUSPEND;
1da177e4 999 rq.special = &args;
c00895ab 1000 rq.data = &rqpm;
1da177e4 1001 rqpm.pm_step = ide_pm_state_start_suspend;
b887d2e6
DB		 1002 if (mesg.event == PM_EVENT_PRETHAW)
1003 mesg.event = PM_EVENT_FREEZE;
1004 rqpm.pm_state = mesg.event;
1da177e4
LT		 1005
1006 return ide_do_drive_cmd(drive, &rq, ide_wait);
1007}
1008
1009static int generic_ide_resume(struct device *dev)
1010{
1011 ide_drive_t *drive = dev->driver_data;
e3a59b4d 1012 ide_hwif_t *hwif = HWIF(drive);
1da177e4
LT		 1013 struct request rq;
1014 struct request_pm_state rqpm;
1015 ide_task_t args;
0d2157f7 1016 int err;
1da177e4 1017
e3a59b4d
HR		 1018 /* Call ACPI _STM only once */
1019 if (!(drive->dn % 2))
1020 ide_acpi_push_timing(hwif);
1021
1022 ide_acpi_exec_tfs(drive);
1023
1da177e4
LT		 1024 memset(&rq, 0, sizeof(rq));
1025 memset(&rqpm, 0, sizeof(rqpm));
1026 memset(&args, 0, sizeof(args));
4aff5e23 1027 rq.cmd_type = REQ_TYPE_PM_RESUME;
1da177e4 1028 rq.special = &args;
c00895ab 1029 rq.data = &rqpm;
1da177e4 1030 rqpm.pm_step = ide_pm_state_start_resume;
ca078bae 1031 rqpm.pm_state = PM_EVENT_ON;
1da177e4 1032
0d2157f7
LT		 1033 err = ide_do_drive_cmd(drive, &rq, ide_head_wait);
1034
ce9b2b0a
RW		 1035 if (err == 0 && dev->driver) {
1036 ide_driver_t *drv = to_ide_driver(dev->driver);
1037
1038 if (drv->resume)
1039 drv->resume(drive);
1040 }
0d2157f7
LT		 1041
1042 return err;
1da177e4
LT		 1043}
1044
1045int generic_ide_ioctl(ide_drive_t *drive, struct file *file, struct block_device *bdev,
1046 unsigned int cmd, unsigned long arg)
1047{
1497943e 1048 unsigned long flags;
1da177e4 1049 ide_driver_t *drv;
1da177e4 1050 void __user *p = (void __user *)arg;
1497943e
BZ		 1051 int err = 0, (*setfunc)(ide_drive_t *, int);
1052 u8 *val;
1da177e4 1053
1497943e
BZ		 1054 switch (cmd) {
1055 case HDIO_GET_32BIT: val = &drive->io_32bit; goto read_val;
1056 case HDIO_GET_KEEPSETTINGS: val = &drive->keep_settings; goto read_val;
1057 case HDIO_GET_UNMASKINTR: val = &drive->unmask; goto read_val;
1058 case HDIO_GET_DMA: val = &drive->using_dma; goto read_val;
1059 case HDIO_SET_32BIT: setfunc = set_io_32bit; goto set_val;
1060 case HDIO_SET_KEEPSETTINGS: setfunc = set_ksettings; goto set_val;
1061 case HDIO_SET_PIO_MODE: setfunc = set_pio_mode; goto set_val;
1062 case HDIO_SET_UNMASKINTR: setfunc = set_unmaskirq; goto set_val;
1063 case HDIO_SET_DMA: setfunc = set_using_dma; goto set_val;
1da177e4 1064 }
1da177e4
LT		 1065
1066 switch (cmd) {
1da177e4
LT		 1067 case HDIO_OBSOLETE_IDENTITY:
1068 case HDIO_GET_IDENTITY:
1069 if (bdev != bdev->bd_contains)
1070 return -EINVAL;
1071 if (drive->id_read == 0)
1072 return -ENOMSG;
1073 if (copy_to_user(p, drive->id, (cmd == HDIO_GET_IDENTITY) ? sizeof(*drive->id) : 142))
1074 return -EFAULT;
1075 return 0;
1076
1077 case HDIO_GET_NICE:
1078 return put_user(drive->dsc_overlap << IDE_NICE_DSC_OVERLAP |
1079 drive->atapi_overlap << IDE_NICE_ATAPI_OVERLAP |
1080 drive->nice0 << IDE_NICE_0 |
1081 drive->nice1 << IDE_NICE_1 |
1082 drive->nice2 << IDE_NICE_2,
1083 (long __user *) arg);
1084
1085#ifdef CONFIG_IDE_TASK_IOCTL
1086 case HDIO_DRIVE_TASKFILE:
1087 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
1088 return -EACCES;
1089 switch(drive->media) {
1090 case ide_disk:
1091 return ide_taskfile_ioctl(drive, cmd, arg);
1092 default:
1093 return -ENOMSG;
1094 }
1095#endif /* CONFIG_IDE_TASK_IOCTL */
1096
1097 case HDIO_DRIVE_CMD:
1098 if (!capable(CAP_SYS_RAWIO))
1099 return -EACCES;
1100 return ide_cmd_ioctl(drive, cmd, arg);
1101
1102 case HDIO_DRIVE_TASK:
1103 if (!capable(CAP_SYS_RAWIO))
1104 return -EACCES;
1105 return ide_task_ioctl(drive, cmd, arg);
1106
1107 case HDIO_SCAN_HWIF:
1108 {
1109 hw_regs_t hw;
1110 int args[3];
1111 if (!capable(CAP_SYS_RAWIO)) return -EACCES;
1112 if (copy_from_user(args, p, 3 * sizeof(int)))
1113 return -EFAULT;
1114 memset(&hw, 0, sizeof(hw));
1115 ide_init_hwif_ports(&hw, (unsigned long) args[0],
1116 (unsigned long) args[1], NULL);
1117 hw.irq = args[2];
869c56ee 1118 if (ide_register_hw(&hw, 0, NULL) == -1)
1da177e4
LT		 1119 return -EIO;
1120 return 0;
1121 }
1122 case HDIO_UNREGISTER_HWIF:
1123 if (!capable(CAP_SYS_RAWIO)) return -EACCES;
1124 /* (arg > MAX_HWIFS) checked in function */
1125 ide_unregister(arg);
1126 return 0;
1127 case HDIO_SET_NICE:
1128 if (!capable(CAP_SYS_ADMIN)) return -EACCES;
1129 if (arg != (arg & ((1 << IDE_NICE_DSC_OVERLAP) | (1 << IDE_NICE_1))))
1130 return -EPERM;
1131 drive->dsc_overlap = (arg >> IDE_NICE_DSC_OVERLAP) & 1;
1132 drv = *(ide_driver_t **)bdev->bd_disk->private_data;
1133 if (drive->dsc_overlap && !drv->supports_dsc_overlap) {
1134 drive->dsc_overlap = 0;
1135 return -EPERM;
1136 }
1137 drive->nice1 = (arg >> IDE_NICE_1) & 1;
1138 return 0;
1139 case HDIO_DRIVE_RESET:
1140 {
1141 unsigned long flags;
1142 if (!capable(CAP_SYS_ADMIN)) return -EACCES;
1143
1144 /*
1145 * Abort the current command on the
1146 * group if there is one, taking
1147 * care not to allow anything else
1148 * to be queued and to die on the
1149 * spot if we miss one somehow
1150 */
1151
1152 spin_lock_irqsave(&ide_lock, flags);
1153
913759ac
AC		 1154 if (HWGROUP(drive)->resetting) {
1155 spin_unlock_irqrestore(&ide_lock, flags);
1156 return -EBUSY;
1157 }
1158
1da177e4
LT		 1159 ide_abort(drive, "drive reset");
1160
125e1874 1161 BUG_ON(HWGROUP(drive)->handler);
1da177e4
LT		 1162
1163 /* Ensure nothing gets queued after we
1164 drop the lock. Reset will clear the busy */
1165
1166 HWGROUP(drive)->busy = 1;
1167 spin_unlock_irqrestore(&ide_lock, flags);
1168 (void) ide_do_reset(drive);
1169
1170 return 0;
1171 }
1172
1173 case CDROMEJECT:
1174 case CDROMCLOSETRAY:
1175 return scsi_cmd_ioctl(file, bdev->bd_disk, cmd, p);
1176
1177 case HDIO_GET_BUSSTATE:
1178 if (!capable(CAP_SYS_ADMIN))
1179 return -EACCES;
1180 if (put_user(HWIF(drive)->bus_state, (long __user *)arg))
1181 return -EFAULT;
1182 return 0;
1183
1184 case HDIO_SET_BUSSTATE:
1185 if (!capable(CAP_SYS_ADMIN))
1186 return -EACCES;
1187 if (HWIF(drive)->busproc)
1188 return HWIF(drive)->busproc(drive, (int)arg);
1189 return -EOPNOTSUPP;
1190 default:
1191 return -EINVAL;
1192 }
1497943e
BZ		 1193
1194read_val:
1195 down(&ide_setting_sem);
1196 spin_lock_irqsave(&ide_lock, flags);
1197 err = *val;
1198 spin_unlock_irqrestore(&ide_lock, flags);
1199 up(&ide_setting_sem);
1200 return err >= 0 ? put_user(err, (long __user *)arg) : err;
1201
1202set_val:
1203 if (bdev != bdev->bd_contains)
1204 err = -EINVAL;
1205 else {
1206 if (!capable(CAP_SYS_ADMIN))
1207 err = -EACCES;
1208 else {
1209 down(&ide_setting_sem);
1210 err = setfunc(drive, arg);
1211 up(&ide_setting_sem);
1212 }
1213 }
1214 return err;
1da177e4
LT		 1215}
1216
1217EXPORT_SYMBOL(generic_ide_ioctl);
1218
1219/*
1220 * stridx() returns the offset of c within s,
1221 * or -1 if c is '\0' or not found within s.
1222 */
1223static int __init stridx (const char *s, char c)
1224{
1225 char *i = strchr(s, c);
1226 return (i && c) ? i - s : -1;
1227}
1228
1229/*
1230 * match_parm() does parsing for ide_setup():
1231 *
1232 * 1. the first char of s must be '='.
1233 * 2. if the remainder matches one of the supplied keywords,
1234 * the index (1 based) of the keyword is negated and returned.
1235 * 3. if the remainder is a series of no more than max_vals numbers
1236 * separated by commas, the numbers are saved in vals[] and a
1237 * count of how many were saved is returned. Base10 is assumed,
1238 * and base16 is allowed when prefixed with "0x".
1239 * 4. otherwise, zero is returned.
1240 */
1241static int __init match_parm (char *s, const char *keywords[], int vals[], int max_vals)
1242{
1243 static const char *decimal = "0123456789";
1244 static const char *hex = "0123456789abcdef";
1245 int i, n;
1246
1247 if (*s++ == '=') {
1248 /*
1249 * Try matching against the supplied keywords,
1250 * and return -(index+1) if we match one
1251 */
1252 if (keywords != NULL) {
1253 for (i = 0; *keywords != NULL; ++i) {
1254 if (!strcmp(s, *keywords++))
1255 return -(i+1);
1256 }
1257 }
1258 /*
1259 * Look for a series of no more than "max_vals"
1260 * numeric values separated by commas, in base10,
1261 * or base16 when prefixed with "0x".
1262 * Return a count of how many were found.
1263 */
1264 for (n = 0; (i = stridx(decimal, *s)) >= 0;) {
1265 vals[n] = i;
1266 while ((i = stridx(decimal, *++s)) >= 0)
1267 vals[n] = (vals[n] * 10) + i;
1268 if (*s == 'x' && !vals[n]) {
1269 while ((i = stridx(hex, *++s)) >= 0)
1270 vals[n] = (vals[n] * 0x10) + i;
1271 }
1272 if (++n == max_vals)
1273 break;
1274 if (*s == ',' || *s == ';')
1275 ++s;
1276 }
1277 if (!*s)
1278 return n;
1279 }
1280 return 0; /* zero = nothing matched */
1281}
1282
1283#ifdef CONFIG_BLK_DEV_ALI14XX
84913882 1284extern int probe_ali14xx;
1da177e4
LT		 1285extern int ali14xx_init(void);
1286#endif
1287#ifdef CONFIG_BLK_DEV_UMC8672
84913882 1288extern int probe_umc8672;
1da177e4
LT		 1289extern int umc8672_init(void);
1290#endif
1291#ifdef CONFIG_BLK_DEV_DTC2278
84913882 1292extern int probe_dtc2278;
1da177e4
LT		 1293extern int dtc2278_init(void);
1294#endif
1295#ifdef CONFIG_BLK_DEV_HT6560B
84913882 1296extern int probe_ht6560b;
1da177e4
LT		 1297extern int ht6560b_init(void);
1298#endif
1299#ifdef CONFIG_BLK_DEV_QD65XX
84913882 1300extern int probe_qd65xx;
1da177e4
LT		 1301extern int qd65xx_init(void);
1302#endif
1303
1304static int __initdata is_chipset_set[MAX_HWIFS];
1305
1306/*
1307 * ide_setup() gets called VERY EARLY during initialization,
1308 * to handle kernel "command line" strings beginning with "hdx=" or "ide".
1309 *
1310 * Remember to update Documentation/ide.txt if you change something here.
1311 */
1312static int __init ide_setup(char *s)
1313{
1314 int i, vals[3];
1315 ide_hwif_t *hwif;
1316 ide_drive_t *drive;
1317 unsigned int hw, unit;
1318 const char max_drive = 'a' + ((MAX_HWIFS * MAX_DRIVES) - 1);
1319 const char max_hwif = '0' + (MAX_HWIFS - 1);
1320
1321
1322 if (strncmp(s,"hd",2) == 0 && s[2] == '=') /* hd= is for hd.c */
1323 return 0; /* driver and not us */
1324
1325 if (strncmp(s,"ide",3) && strncmp(s,"idebus",6) && strncmp(s,"hd",2))
1326 return 0;
1327
1328 printk(KERN_INFO "ide_setup: %s", s);
1329 init_ide_data ();
1330
1331#ifdef CONFIG_BLK_DEV_IDEDOUBLER
1332 if (!strcmp(s, "ide=doubler")) {
1333 extern int ide_doubler;
1334
1335 printk(" : Enabled support for IDE doublers\n");
1336 ide_doubler = 1;
1337 return 1;
1338 }
1339#endif /* CONFIG_BLK_DEV_IDEDOUBLER */
1340
1341 if (!strcmp(s, "ide=nodma")) {
1342 printk(" : Prevented DMA\n");
1343 noautodma = 1;
1344 return 1;
1345 }
1346
6d208b39 1347#ifdef CONFIG_IDEPCI_PCIBUS_ORDER
1da177e4
LT		 1348 if (!strcmp(s, "ide=reverse")) {
1349 ide_scan_direction = 1;
1350 printk(" : Enabled support for IDE inverse scan order.\n");
1351 return 1;
1352 }
6d208b39 1353#endif
1da177e4 1354
e3a59b4d
HR		 1355#ifdef CONFIG_BLK_DEV_IDEACPI
1356 if (!strcmp(s, "ide=noacpi")) {
1357 //printk(" : Disable IDE ACPI support.\n");
1358 ide_noacpi = 1;
1359 return 1;
1360 }
1361 if (!strcmp(s, "ide=acpigtf")) {
1362 //printk(" : Enable IDE ACPI _GTF support.\n");
1363 ide_noacpitfs = 0;
1364 return 1;
1365 }
1366 if (!strcmp(s, "ide=acpionboot")) {
1367 //printk(" : Call IDE ACPI methods on boot.\n");
1368 ide_noacpionboot = 0;
1369 return 1;
1370 }
1371#endif /* CONFIG_BLK_DEV_IDEACPI */
1372
1da177e4
LT		 1373 /*
1374 * Look for drive options: "hdx="
1375 */
1376 if (s[0] == 'h' && s[1] == 'd' && s[2] >= 'a' && s[2] <= max_drive) {
1377 const char *hd_words[] = {
b6209a90 1378 "none", "noprobe", "nowerr", "cdrom", "minus5",
1da177e4 1379 "autotune", "noautotune", "minus8", "swapdata", "bswap",
36193484 1380 "noflush", "remap", "remap63", "scsi", NULL };
1da177e4
LT		 1381 unit = s[2] - 'a';
1382 hw = unit / MAX_DRIVES;
1383 unit = unit % MAX_DRIVES;
1384 hwif = &ide_hwifs[hw];
1385 drive = &hwif->drives[unit];
1386 if (strncmp(s + 4, "ide-", 4) == 0) {
1387 strlcpy(drive->driver_req, s + 4, sizeof(drive->driver_req));
1388 goto done;
1389 }
1390 switch (match_parm(&s[3], hd_words, vals, 3)) {
1391 case -1: /* "none" */
1392 case -2: /* "noprobe" */
1393 drive->noprobe = 1;
1394 goto done;
1395 case -3: /* "nowerr" */
1396 drive->bad_wstat = BAD_R_STAT;
1397 hwif->noprobe = 0;
1398 goto done;
1399 case -4: /* "cdrom" */
1400 drive->present = 1;
1401 drive->media = ide_cdrom;
1402 /* an ATAPI device ignores DRDY */
1403 drive->ready_stat = 0;
1404 hwif->noprobe = 0;
1405 goto done;
1da177e4
LT		 1406 case -6: /* "autotune" */
1407 drive->autotune = IDE_TUNE_AUTO;
1408 goto obsolete_option;
1409 case -7: /* "noautotune" */
1410 drive->autotune = IDE_TUNE_NOAUTO;
1411 goto obsolete_option;
1412 case -9: /* "swapdata" */
1413 case -10: /* "bswap" */
1414 drive->bswap = 1;
1415 goto done;
36193484
JA		 1416 case -11: /* noflush */
1417 drive->noflush = 1;
1418 goto done;
1da177e4
LT		 1419 case -12: /* "remap" */
1420 drive->remap_0_to_1 = 1;
1421 goto done;
1422 case -13: /* "remap63" */
1423 drive->sect0 = 63;
1424 goto done;
1425 case -14: /* "scsi" */
1426 drive->scsi = 1;
1427 goto done;
1428 case 3: /* cyl,head,sect */
1429 drive->media = ide_disk;
1430 drive->ready_stat = READY_STAT;
1431 drive->cyl = drive->bios_cyl = vals[0];
1432 drive->head = drive->bios_head = vals[1];
1433 drive->sect = drive->bios_sect = vals[2];
1434 drive->present = 1;
1435 drive->forced_geom = 1;
1436 hwif->noprobe = 0;
1437 goto done;
1438 default:
1439 goto bad_option;
1440 }
1441 }
1442
1443 if (s[0] != 'i' || s[1] != 'd' || s[2] != 'e')
1444 goto bad_option;
1445 /*
1446 * Look for bus speed option: "idebus="
1447 */
1448 if (s[3] == 'b' && s[4] == 'u' && s[5] == 's') {
1449 if (match_parm(&s[6], NULL, vals, 1) != 1)
1450 goto bad_option;
1451 if (vals[0] >= 20 && vals[0] <= 66) {
1452 idebus_parameter = vals[0];
1453 } else
1454 printk(" -- BAD BUS SPEED! Expected value from 20 to 66");
1455 goto done;
1456 }
1457 /*
1458 * Look for interface options: "idex="
1459 */
1460 if (s[3] >= '0' && s[3] <= max_hwif) {
1461 /*
1462 * Be VERY CAREFUL changing this: note hardcoded indexes below
1463 * (-8, -9, -10) are reserved to ease the hardcoding.
1464 */
1465 static const char *ide_words[] = {
b6209a90 1466 "noprobe", "serialize", "minus3", "minus4",
1da177e4
LT		 1467 "reset", "dma", "ata66", "minus8", "minus9",
1468 "minus10", "four", "qd65xx", "ht6560b", "cmd640_vlb",
1469 "dtc2278", "umc8672", "ali14xx", NULL };
1470 hw = s[3] - '0';
1471 hwif = &ide_hwifs[hw];
1472 i = match_parm(&s[4], ide_words, vals, 3);
1473
1474 /*
1475 * Cryptic check to ensure chipset not already set for hwif.
1476 * Note: we can't depend on hwif->chipset here.
1477 */
1478 if ((i >= -18 && i <= -11) || (i > 0 && i <= 3)) {
1479 /* chipset already specified */
1480 if (is_chipset_set[hw])
1481 goto bad_option;
1482 if (i > -18 && i <= -11) {
1483 /* these drivers are for "ide0=" only */
1484 if (hw != 0)
1485 goto bad_hwif;
1486 /* chipset already specified for 2nd port */
1487 if (is_chipset_set[hw+1])
1488 goto bad_option;
1489 }
1490 is_chipset_set[hw] = 1;
1491 printk("\n");
1492 }
1493
1494 switch (i) {
1495#ifdef CONFIG_BLK_DEV_ALI14XX
1496 case -17: /* "ali14xx" */
1497 probe_ali14xx = 1;
1498 goto done;
1499#endif
1500#ifdef CONFIG_BLK_DEV_UMC8672
1501 case -16: /* "umc8672" */
1502 probe_umc8672 = 1;
1503 goto done;
1504#endif
1505#ifdef CONFIG_BLK_DEV_DTC2278
1506 case -15: /* "dtc2278" */
1507 probe_dtc2278 = 1;
1508 goto done;
1509#endif
1510#ifdef CONFIG_BLK_DEV_CMD640
1511 case -14: /* "cmd640_vlb" */
1512 {
1513 extern int cmd640_vlb; /* flag for cmd640.c */
1514 cmd640_vlb = 1;
1515 goto done;
1516 }
1517#endif
1518#ifdef CONFIG_BLK_DEV_HT6560B
1519 case -13: /* "ht6560b" */
1520 probe_ht6560b = 1;
1521 goto done;
1522#endif
1523#ifdef CONFIG_BLK_DEV_QD65XX
1524 case -12: /* "qd65xx" */
1525 probe_qd65xx = 1;
1526 goto done;
1527#endif
1528#ifdef CONFIG_BLK_DEV_4DRIVES
1529 case -11: /* "four" drives on one set of ports */
1530 {
1531 ide_hwif_t *mate = &ide_hwifs[hw^1];
1532 mate->drives[0].select.all ^= 0x20;
1533 mate->drives[1].select.all ^= 0x20;
1534 hwif->chipset = mate->chipset = ide_4drives;
1535 mate->irq = hwif->irq;
1536 memcpy(mate->io_ports, hwif->io_ports, sizeof(hwif->io_ports));
b6209a90
BZ		 1537 hwif->mate = mate;
1538 mate->mate = hwif;
1539 hwif->serialized = mate->serialized = 1;
1540 goto obsolete_option;
1da177e4
LT		 1541 }
1542#endif /* CONFIG_BLK_DEV_4DRIVES */
1543 case -10: /* minus10 */
1544 case -9: /* minus9 */
1545 case -8: /* minus8 */
b6209a90
BZ		 1546 case -4:
1547 case -3:
1da177e4
LT		 1548 goto bad_option;
1549 case -7: /* ata66 */
1550#ifdef CONFIG_BLK_DEV_IDEPCI
1551 hwif->udma_four = 1;
1552 goto obsolete_option;
1553#else
1554 goto bad_hwif;
1555#endif
1556 case -6: /* dma */
1557 hwif->autodma = 1;
1558 goto obsolete_option;
1559 case -5: /* "reset" */
1560 hwif->reset = 1;
1561 goto obsolete_option;
1da177e4 1562 case -2: /* "serialize" */
1da177e4
LT		 1563 hwif->mate = &ide_hwifs[hw^1];
1564 hwif->mate->mate = hwif;
1565 hwif->serialized = hwif->mate->serialized = 1;
1566 goto obsolete_option;
1567
1568 case -1: /* "noprobe" */
1569 hwif->noprobe = 1;
1570 goto done;
1571
1572 case 1: /* base */
1573 vals[1] = vals[0] + 0x206; /* default ctl */
1574 case 2: /* base,ctl */
1575 vals[2] = 0; /* default irq = probe for it */
1576 case 3: /* base,ctl,irq */
1577 hwif->hw.irq = vals[2];
1578 ide_init_hwif_ports(&hwif->hw, (unsigned long) vals[0], (unsigned long) vals[1], &hwif->irq);
1579 memcpy(hwif->io_ports, hwif->hw.io_ports, sizeof(hwif->io_ports));
1580 hwif->irq = vals[2];
1581 hwif->noprobe = 0;
1582 hwif->chipset = ide_forced;
1583 goto obsolete_option;
1584
1585 case 0: goto bad_option;
1586 default:
1587 printk(" -- SUPPORT NOT CONFIGURED IN THIS KERNEL\n");
1588 return 1;
1589 }
1590 }
1591bad_option:
1592 printk(" -- BAD OPTION\n");
1593 return 1;
1594obsolete_option:
1595 printk(" -- OBSOLETE OPTION, WILL BE REMOVED SOON!\n");
1596 return 1;
1597bad_hwif:
1598 printk("-- NOT SUPPORTED ON ide%d", hw);
1599done:
1600 printk("\n");
1601 return 1;
1602}
1603
eb797227
AV		 1604extern void __init pnpide_init(void);
1605extern void __exit pnpide_exit(void);
1606extern void __init h8300_ide_init(void);
1da177e4
LT		 1607
1608/*
1609 * probe_for_hwifs() finds/initializes "known" IDE interfaces
1610 */
1611static void __init probe_for_hwifs (void)
1612{
6d208b39 1613#ifdef CONFIG_IDEPCI_PCIBUS_ORDER
1da177e4 1614 ide_scan_pcibus(ide_scan_direction);
6d208b39 1615#endif
1da177e4
LT		 1616
1617#ifdef CONFIG_ETRAX_IDE
1618 {
1619 extern void init_e100_ide(void);
1620 init_e100_ide();
1621 }
1622#endif /* CONFIG_ETRAX_IDE */
1623#ifdef CONFIG_BLK_DEV_CMD640
1624 {
1625 extern void ide_probe_for_cmd640x(void);
1626 ide_probe_for_cmd640x();
1627 }
1628#endif /* CONFIG_BLK_DEV_CMD640 */
1629#ifdef CONFIG_BLK_DEV_IDE_PMAC
1630 {
9e5755bc
AM		 1631 extern int pmac_ide_probe(void);
1632 (void)pmac_ide_probe();
1da177e4
LT		 1633 }
1634#endif /* CONFIG_BLK_DEV_IDE_PMAC */
1635#ifdef CONFIG_BLK_DEV_GAYLE
1636 {
1637 extern void gayle_init(void);
1638 gayle_init();
1639 }
1640#endif /* CONFIG_BLK_DEV_GAYLE */
1641#ifdef CONFIG_BLK_DEV_FALCON_IDE
1642 {
1643 extern void falconide_init(void);
1644 falconide_init();
1645 }
1646#endif /* CONFIG_BLK_DEV_FALCON_IDE */
1647#ifdef CONFIG_BLK_DEV_MAC_IDE
1648 {
1649 extern void macide_init(void);
1650 macide_init();
1651 }
1652#endif /* CONFIG_BLK_DEV_MAC_IDE */
1653#ifdef CONFIG_BLK_DEV_Q40IDE
1654 {
1655 extern void q40ide_init(void);
1656 q40ide_init();
1657 }
1658#endif /* CONFIG_BLK_DEV_Q40IDE */
1659#ifdef CONFIG_BLK_DEV_BUDDHA
1660 {
1661 extern void buddha_init(void);
1662 buddha_init();
1663 }
1664#endif /* CONFIG_BLK_DEV_BUDDHA */
1665#ifdef CONFIG_BLK_DEV_IDEPNP
1666 pnpide_init();
1667#endif
1668#ifdef CONFIG_H8300
1669 h8300_ide_init();
1670#endif
1671}
1672
1da177e4
LT		 1673/*
1674 * Probe module
1675 */
1676
1677EXPORT_SYMBOL(ide_lock);
1678
8604affd
BZ		 1679static int ide_bus_match(struct device *dev, struct device_driver *drv)
1680{
1681 return 1;
1682}
1683
263756ec
KS		 1684static char *media_string(ide_drive_t *drive)
1685{
1686 switch (drive->media) {
1687 case ide_disk:
1688 return "disk";
1689 case ide_cdrom:
1690 return "cdrom";
1691 case ide_tape:
1692 return "tape";
1693 case ide_floppy:
1694 return "floppy";
a7a832de
DK		 1695 case ide_optical:
1696 return "optical";
263756ec
KS		 1697 default:
1698 return "UNKNOWN";
1699 }
1700}
1701
1702static ssize_t media_show(struct device *dev, struct device_attribute *attr, char *buf)
1703{
1704 ide_drive_t *drive = to_ide_device(dev);
1705 return sprintf(buf, "%s\n", media_string(drive));
1706}
1707
1708static ssize_t drivename_show(struct device *dev, struct device_attribute *attr, char *buf)
1709{
1710 ide_drive_t *drive = to_ide_device(dev);
1711 return sprintf(buf, "%s\n", drive->name);
1712}
1713
1714static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf)
1715{
1716 ide_drive_t *drive = to_ide_device(dev);
1717 return sprintf(buf, "ide:m-%s\n", media_string(drive));
1718}
1719
1720static struct device_attribute ide_dev_attrs[] = {
1721 __ATTR_RO(media),
1722 __ATTR_RO(drivename),
1723 __ATTR_RO(modalias),
1724 __ATTR_NULL
1725};
1726
1727static int ide_uevent(struct device *dev, char **envp, int num_envp,
1728 char *buffer, int buffer_size)
1729{
1730 ide_drive_t *drive = to_ide_device(dev);
1731 int i = 0;
1732 int length = 0;
1733
1734 add_uevent_var(envp, num_envp, &i, buffer, buffer_size, &length,
1735 "MEDIA=%s", media_string(drive));
1736 add_uevent_var(envp, num_envp, &i, buffer, buffer_size, &length,
1737 "DRIVENAME=%s", drive->name);
1738 add_uevent_var(envp, num_envp, &i, buffer, buffer_size, &length,
1739 "MODALIAS=ide:m-%s", media_string(drive));
1740 envp[i] = NULL;
1741 return 0;
1742}
1743
4031bbe4
RK		 1744static int generic_ide_probe(struct device *dev)
1745{
1746 ide_drive_t *drive = to_ide_device(dev);
1747 ide_driver_t *drv = to_ide_driver(dev->driver);
1748
1749 return drv->probe ? drv->probe(drive) : -ENODEV;
1750}
1751
1752static int generic_ide_remove(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 (drv->remove)
1758 drv->remove(drive);
1759
1760 return 0;
1761}
1762
1763static void generic_ide_shutdown(struct device *dev)
1764{
1765 ide_drive_t *drive = to_ide_device(dev);
1766 ide_driver_t *drv = to_ide_driver(dev->driver);
1767
1768 if (dev->driver && drv->shutdown)
1769 drv->shutdown(drive);
1770}
1771
1da177e4
LT		 1772struct bus_type ide_bus_type = {
1773 .name = "ide",
8604affd 1774 .match = ide_bus_match,
263756ec 1775 .uevent = ide_uevent,
4031bbe4
RK		 1776 .probe = generic_ide_probe,
1777 .remove = generic_ide_remove,
1778 .shutdown = generic_ide_shutdown,
263756ec 1779 .dev_attrs = ide_dev_attrs,
1da177e4
LT		 1780 .suspend = generic_ide_suspend,
1781 .resume = generic_ide_resume,
1782};
1783
8604affd
BZ		 1784EXPORT_SYMBOL_GPL(ide_bus_type);
1785
1da177e4
LT		 1786/*
1787 * This is gets invoked once during initialization, to set *everything* up
1788 */
1789static int __init ide_init(void)
1790{
349ae23f
RD		 1791 int ret;
1792
1da177e4 1793 printk(KERN_INFO "Uniform Multi-Platform E-IDE driver " REVISION "\n");
1da177e4
LT		 1794 system_bus_speed = ide_system_bus_speed();
1795
349ae23f
RD		 1796 ret = bus_register(&ide_bus_type);
1797 if (ret < 0) {
1798 printk(KERN_WARNING "IDE: bus_register error: %d\n", ret);
1799 return ret;
1800 }
1da177e4
LT		 1801
1802 init_ide_data();
1803
5cbf79cd 1804 proc_ide_create();
1da177e4
LT		 1805
1806#ifdef CONFIG_BLK_DEV_ALI14XX
1807 if (probe_ali14xx)
1808 (void)ali14xx_init();
1809#endif
1810#ifdef CONFIG_BLK_DEV_UMC8672
1811 if (probe_umc8672)
1812 (void)umc8672_init();
1813#endif
1814#ifdef CONFIG_BLK_DEV_DTC2278
1815 if (probe_dtc2278)
1816 (void)dtc2278_init();
1817#endif
1818#ifdef CONFIG_BLK_DEV_HT6560B
1819 if (probe_ht6560b)
1820 (void)ht6560b_init();
1821#endif
1822#ifdef CONFIG_BLK_DEV_QD65XX
1823 if (probe_qd65xx)
1824 (void)qd65xx_init();
1825#endif
1826
1da177e4
LT		 1827 /* Probe for special PCI and other "known" interface chipsets. */
1828 probe_for_hwifs();
1da177e4 1829
1da177e4
LT		 1830 return 0;
1831}
1832
1833#ifdef MODULE
1834static char *options = NULL;
1835module_param(options, charp, 0);
1836MODULE_LICENSE("GPL");
1837
1838static void __init parse_options (char *line)
1839{
1840 char *next = line;
1841
1842 if (line == NULL || !*line)
1843 return;
1844 while ((line = next) != NULL) {
1845 if ((next = strchr(line,' ')) != NULL)
1846 *next++ = 0;
1847 if (!ide_setup(line))
1848 printk (KERN_INFO "Unknown option '%s'\n", line);
1849 }
1850}
1851
fbd8ad30 1852int __init init_module (void)
1da177e4
LT		 1853{
1854 parse_options(options);
1855 return ide_init();
1856}
1857
eb797227 1858void __exit cleanup_module (void)
1da177e4
LT		 1859{
1860 int index;
1861
1862 for (index = 0; index < MAX_HWIFS; ++index)
1863 ide_unregister(index);
1864
6855036a
TH		 1865#ifdef CONFIG_BLK_DEV_IDEPNP
1866 pnpide_exit();
1867#endif
1868
1da177e4 1869 proc_ide_destroy();
1da177e4
LT		 1870
1871 bus_unregister(&ide_bus_type);
1872}
1873
1874#else /* !MODULE */
1875
1876__setup("", ide_setup);
1877
1878module_init(ide_init);
1879
1880#endif /* MODULE */
Linux kernel - Deliverables
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