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Merge master.kernel.org:/pub/scm/linux/kernel/git/davej/cpufreq
[deliverable/linux.git] / drivers / ide / ide.c
1 /*
2 * linux/drivers/ide/ide.c Version 7.00beta2 Mar 05 2003
3 *
4 * Copyright (C) 1994-1998 Linus Torvalds & authors (see below)
5 */
6
7 /*
8 * Mostly written by Mark Lord <mlord@pobox.com>
9 * and Gadi Oxman <gadio@netvision.net.il>
10 * and Andre Hedrick <andre@linux-ide.org>
11 *
12 * See linux/MAINTAINERS for address of current maintainer.
13 *
14 * This is the multiple IDE interface driver, as evolved from hd.c.
15 * It supports up to MAX_HWIFS IDE interfaces, on one or more IRQs
16 * (usually 14 & 15).
17 * There can be up to two drives per interface, as per the ATA-2 spec.
18 *
19 * Primary: ide0, port 0x1f0; major=3; hda is minor=0; hdb is minor=64
20 * Secondary: ide1, port 0x170; major=22; hdc is minor=0; hdd is minor=64
21 * Tertiary: ide2, port 0x???; major=33; hde is minor=0; hdf is minor=64
22 * Quaternary: ide3, port 0x???; major=34; hdg is minor=0; hdh is minor=64
23 * ...
24 *
25 * From hd.c:
26 * |
27 * | It traverses the request-list, using interrupts to jump between functions.
28 * | As nearly all functions can be called within interrupts, we may not sleep.
29 * | Special care is recommended. Have Fun!
30 * |
31 * | modified by Drew Eckhardt to check nr of hd's from the CMOS.
32 * |
33 * | Thanks to Branko Lankester, lankeste@fwi.uva.nl, who found a bug
34 * | in the early extended-partition checks and added DM partitions.
35 * |
36 * | Early work on error handling by Mika Liljeberg (liljeber@cs.Helsinki.FI).
37 * |
38 * | IRQ-unmask, drive-id, multiple-mode, support for ">16 heads",
39 * | and general streamlining by Mark Lord (mlord@pobox.com).
40 *
41 * October, 1994 -- Complete line-by-line overhaul for linux 1.1.x, by:
42 *
43 * Mark Lord (mlord@pobox.com) (IDE Perf.Pkg)
44 * Delman Lee (delman@ieee.org) ("Mr. atdisk2")
45 * Scott Snyder (snyder@fnald0.fnal.gov) (ATAPI IDE cd-rom)
46 *
47 * This was a rewrite of just about everything from hd.c, though some original
48 * code is still sprinkled about. Think of it as a major evolution, with
49 * inspiration from lots of linux users, esp. hamish@zot.apana.org.au
50 *
51 * Version 1.0 ALPHA initial code, primary i/f working okay
52 * Version 1.3 BETA dual i/f on shared irq tested & working!
53 * Version 1.4 BETA added auto probing for irq(s)
54 * Version 1.5 BETA added ALPHA (untested) support for IDE cd-roms,
55 * ...
56 * Version 5.50 allow values as small as 20 for idebus=
57 * Version 5.51 force non io_32bit in drive_cmd_intr()
58 * change delay_10ms() to delay_50ms() to fix problems
59 * Version 5.52 fix incorrect invalidation of removable devices
60 * add "hdx=slow" command line option
61 * Version 5.60 start to modularize the driver; the disk and ATAPI
62 * drivers can be compiled as loadable modules.
63 * move IDE probe code to ide-probe.c
64 * move IDE disk code to ide-disk.c
65 * add support for generic IDE device subdrivers
66 * add m68k code from Geert Uytterhoeven
67 * probe all interfaces by default
68 * add ioctl to (re)probe an interface
69 * Version 6.00 use per device request queues
70 * attempt to optimize shared hwgroup performance
71 * add ioctl to manually adjust bandwidth algorithms
72 * add kerneld support for the probe module
73 * fix bug in ide_error()
74 * fix bug in the first ide_get_lock() call for Atari
75 * don't flush leftover data for ATAPI devices
76 * Version 6.01 clear hwgroup->active while the hwgroup sleeps
77 * support HDIO_GETGEO for floppies
78 * Version 6.02 fix ide_ack_intr() call
79 * check partition table on floppies
80 * Version 6.03 handle bad status bit sequencing in ide_wait_stat()
81 * Version 6.10 deleted old entries from this list of updates
82 * replaced triton.c with ide-dma.c generic PCI DMA
83 * added support for BIOS-enabled UltraDMA
84 * rename all "promise" things to "pdc4030"
85 * fix EZ-DRIVE handling on small disks
86 * Version 6.11 fix probe error in ide_scan_devices()
87 * fix ancient "jiffies" polling bugs
88 * mask all hwgroup interrupts on each irq entry
89 * Version 6.12 integrate ioctl and proc interfaces
90 * fix parsing of "idex=" command line parameter
91 * Version 6.13 add support for ide4/ide5 courtesy rjones@orchestream.com
92 * Version 6.14 fixed IRQ sharing among PCI devices
93 * Version 6.15 added SMP awareness to IDE drivers
94 * Version 6.16 fixed various bugs; even more SMP friendly
95 * Version 6.17 fix for newest EZ-Drive problem
96 * Version 6.18 default unpartitioned-disk translation now "BIOS LBA"
97 * Version 6.19 Re-design for a UNIFORM driver for all platforms,
98 * model based on suggestions from Russell King and
99 * Geert Uytterhoeven
100 * Promise DC4030VL now supported.
101 * add support for ide6/ide7
102 * delay_50ms() changed to ide_delay_50ms() and exported.
103 * Version 6.20 Added/Fixed Generic ATA-66 support and hwif detection.
104 * Added hdx=flash to allow for second flash disk
105 * detection w/o the hang loop.
106 * Added support for ide8/ide9
107 * Added idex=ata66 for the quirky chipsets that are
108 * ATA-66 compliant, but have yet to determine a method
109 * of verification of the 80c cable presence.
110 * Specifically Promise's PDC20262 chipset.
111 * Version 6.21 Fixing/Fixed SMP spinlock issue with insight from an old
112 * hat that clarified original low level driver design.
113 * Version 6.30 Added SMP support; fixed multmode issues. -ml
114 * Version 6.31 Debug Share INTR's and request queue streaming
115 * Native ATA-100 support
116 * Prep for Cascades Project
117 * Version 7.00alpha First named revision of ide rearrange
118 *
119 * Some additional driver compile-time options are in ./include/linux/ide.h
120 *
121 * To do, in likely order of completion:
122 * - modify kernel to obtain BIOS geometry for drives on 2nd/3rd/4th i/f
123 *
124 */
125
126 #define REVISION "Revision: 7.00alpha2"
127 #define VERSION "Id: ide.c 7.00a2 20020906"
128
129 #undef REALLY_SLOW_IO /* most systems can safely undef this */
130
131 #define _IDE_C /* Tell ide.h it's really us */
132
133 #include <linux/config.h>
134 #include <linux/module.h>
135 #include <linux/types.h>
136 #include <linux/string.h>
137 #include <linux/kernel.h>
138 #include <linux/timer.h>
139 #include <linux/mm.h>
140 #include <linux/interrupt.h>
141 #include <linux/major.h>
142 #include <linux/errno.h>
143 #include <linux/genhd.h>
144 #include <linux/blkpg.h>
145 #include <linux/slab.h>
146 #include <linux/init.h>
147 #include <linux/pci.h>
148 #include <linux/delay.h>
149 #include <linux/ide.h>
150 #include <linux/devfs_fs_kernel.h>
151 #include <linux/completion.h>
152 #include <linux/reboot.h>
153 #include <linux/cdrom.h>
154 #include <linux/seq_file.h>
155 #include <linux/device.h>
156 #include <linux/bitops.h>
157
158 #include <asm/byteorder.h>
159 #include <asm/irq.h>
160 #include <asm/uaccess.h>
161 #include <asm/io.h>
162
163
164 /* default maximum number of failures */
165 #define IDE_DEFAULT_MAX_FAILURES 1
166
167 static const u8 ide_hwif_to_major[] = { IDE0_MAJOR, IDE1_MAJOR,
168 IDE2_MAJOR, IDE3_MAJOR,
169 IDE4_MAJOR, IDE5_MAJOR,
170 IDE6_MAJOR, IDE7_MAJOR,
171 IDE8_MAJOR, IDE9_MAJOR };
172
173 static int idebus_parameter; /* holds the "idebus=" parameter */
174 static int system_bus_speed; /* holds what we think is VESA/PCI bus speed */
175 static int initializing; /* set while initializing built-in drivers */
176
177 DECLARE_MUTEX(ide_cfg_sem);
178 __cacheline_aligned_in_smp DEFINE_SPINLOCK(ide_lock);
179
180 #ifdef CONFIG_BLK_DEV_IDEPCI
181 static int ide_scan_direction; /* THIS was formerly 2.2.x pci=reverse */
182 #endif
183
184 #ifdef CONFIG_IDEDMA_AUTO
185 int noautodma = 0;
186 #else
187 int noautodma = 1;
188 #endif
189
190 EXPORT_SYMBOL(noautodma);
191
192 /*
193 * This is declared extern in ide.h, for access by other IDE modules:
194 */
195 ide_hwif_t ide_hwifs[MAX_HWIFS]; /* master data repository */
196
197 EXPORT_SYMBOL(ide_hwifs);
198
199 /*
200 * Do not even *think* about calling this!
201 */
202 static void init_hwif_data(ide_hwif_t *hwif, unsigned int index)
203 {
204 unsigned int unit;
205
206 /* bulk initialize hwif & drive info with zeros */
207 memset(hwif, 0, sizeof(ide_hwif_t));
208
209 /* fill in any non-zero initial values */
210 hwif->index = index;
211 hwif->major = ide_hwif_to_major[index];
212
213 hwif->name[0] = 'i';
214 hwif->name[1] = 'd';
215 hwif->name[2] = 'e';
216 hwif->name[3] = '0' + index;
217
218 hwif->bus_state = BUSSTATE_ON;
219
220 hwif->atapi_dma = 0; /* disable all atapi dma */
221 hwif->ultra_mask = 0x80; /* disable all ultra */
222 hwif->mwdma_mask = 0x80; /* disable all mwdma */
223 hwif->swdma_mask = 0x80; /* disable all swdma */
224
225 sema_init(&hwif->gendev_rel_sem, 0);
226
227 default_hwif_iops(hwif);
228 default_hwif_transport(hwif);
229 for (unit = 0; unit < MAX_DRIVES; ++unit) {
230 ide_drive_t *drive = &hwif->drives[unit];
231
232 drive->media = ide_disk;
233 drive->select.all = (unit<<4)|0xa0;
234 drive->hwif = hwif;
235 drive->ctl = 0x08;
236 drive->ready_stat = READY_STAT;
237 drive->bad_wstat = BAD_W_STAT;
238 drive->special.b.recalibrate = 1;
239 drive->special.b.set_geometry = 1;
240 drive->name[0] = 'h';
241 drive->name[1] = 'd';
242 drive->name[2] = 'a' + (index * MAX_DRIVES) + unit;
243 drive->max_failures = IDE_DEFAULT_MAX_FAILURES;
244 drive->using_dma = 0;
245 drive->is_flash = 0;
246 drive->vdma = 0;
247 INIT_LIST_HEAD(&drive->list);
248 sema_init(&drive->gendev_rel_sem, 0);
249 }
250 }
251
252 static void init_hwif_default(ide_hwif_t *hwif, unsigned int index)
253 {
254 hw_regs_t hw;
255
256 memset(&hw, 0, sizeof(hw_regs_t));
257
258 ide_init_hwif_ports(&hw, ide_default_io_base(index), 0, &hwif->irq);
259
260 memcpy(&hwif->hw, &hw, sizeof(hw));
261 memcpy(hwif->io_ports, hw.io_ports, sizeof(hw.io_ports));
262
263 hwif->noprobe = !hwif->io_ports[IDE_DATA_OFFSET];
264 #ifdef CONFIG_BLK_DEV_HD
265 if (hwif->io_ports[IDE_DATA_OFFSET] == HD_DATA)
266 hwif->noprobe = 1; /* may be overridden by ide_setup() */
267 #endif
268 }
269
270 extern void ide_arm_init(void);
271
272 /*
273 * init_ide_data() sets reasonable default values into all fields
274 * of all instances of the hwifs and drives, but only on the first call.
275 * Subsequent calls have no effect (they don't wipe out anything).
276 *
277 * This routine is normally called at driver initialization time,
278 * but may also be called MUCH earlier during kernel "command-line"
279 * parameter processing. As such, we cannot depend on any other parts
280 * of the kernel (such as memory allocation) to be functioning yet.
281 *
282 * This is too bad, as otherwise we could dynamically allocate the
283 * ide_drive_t structs as needed, rather than always consuming memory
284 * for the max possible number (MAX_HWIFS * MAX_DRIVES) of them.
285 *
286 * FIXME: We should stuff the setup data into __init and copy the
287 * relevant hwifs/allocate them properly during boot.
288 */
289 #define MAGIC_COOKIE 0x12345678
290 static void __init init_ide_data (void)
291 {
292 ide_hwif_t *hwif;
293 unsigned int index;
294 static unsigned long magic_cookie = MAGIC_COOKIE;
295
296 if (magic_cookie != MAGIC_COOKIE)
297 return; /* already initialized */
298 magic_cookie = 0;
299
300 /* Initialise all interface structures */
301 for (index = 0; index < MAX_HWIFS; ++index) {
302 hwif = &ide_hwifs[index];
303 init_hwif_data(hwif, index);
304 init_hwif_default(hwif, index);
305 #if !defined(CONFIG_PPC32) || !defined(CONFIG_PCI)
306 hwif->irq = hwif->hw.irq =
307 ide_init_default_irq(hwif->io_ports[IDE_DATA_OFFSET]);
308 #endif
309 }
310 #ifdef CONFIG_IDE_ARM
311 initializing = 1;
312 ide_arm_init();
313 initializing = 0;
314 #endif
315 }
316
317 /**
318 * ide_system_bus_speed - guess bus speed
319 *
320 * ide_system_bus_speed() returns what we think is the system VESA/PCI
321 * bus speed (in MHz). This is used for calculating interface PIO timings.
322 * The default is 40 for known PCI systems, 50 otherwise.
323 * The "idebus=xx" parameter can be used to override this value.
324 * The actual value to be used is computed/displayed the first time
325 * through. Drivers should only use this as a last resort.
326 *
327 * Returns a guessed speed in MHz.
328 */
329
330 static int ide_system_bus_speed(void)
331 {
332 #ifdef CONFIG_PCI
333 static struct pci_device_id pci_default[] = {
334 { PCI_DEVICE(PCI_ANY_ID, PCI_ANY_ID) },
335 { }
336 };
337 #else
338 #define pci_default 0
339 #endif /* CONFIG_PCI */
340
341 if (!system_bus_speed) {
342 if (idebus_parameter) {
343 /* user supplied value */
344 system_bus_speed = idebus_parameter;
345 } else if (pci_dev_present(pci_default)) {
346 /* safe default value for PCI */
347 system_bus_speed = 33;
348 } else {
349 /* safe default value for VESA and PCI */
350 system_bus_speed = 50;
351 }
352 printk(KERN_INFO "ide: Assuming %dMHz system bus speed "
353 "for PIO modes%s\n", system_bus_speed,
354 idebus_parameter ? "" : "; override with idebus=xx");
355 }
356 return system_bus_speed;
357 }
358
359 #ifdef CONFIG_PROC_FS
360 struct proc_dir_entry *proc_ide_root;
361 #endif
362
363 static struct resource* hwif_request_region(ide_hwif_t *hwif,
364 unsigned long addr, int num)
365 {
366 struct resource *res = request_region(addr, num, hwif->name);
367
368 if (!res)
369 printk(KERN_ERR "%s: I/O resource 0x%lX-0x%lX not free.\n",
370 hwif->name, addr, addr+num-1);
371 return res;
372 }
373
374 /**
375 * ide_hwif_request_regions - request resources for IDE
376 * @hwif: interface to use
377 *
378 * Requests all the needed resources for an interface.
379 * Right now core IDE code does this work which is deeply wrong.
380 * MMIO leaves it to the controller driver,
381 * PIO will migrate this way over time.
382 */
383
384 int ide_hwif_request_regions(ide_hwif_t *hwif)
385 {
386 unsigned long addr;
387 unsigned int i;
388
389 if (hwif->mmio == 2)
390 return 0;
391 BUG_ON(hwif->mmio == 1);
392 addr = hwif->io_ports[IDE_CONTROL_OFFSET];
393 if (addr && !hwif_request_region(hwif, addr, 1))
394 goto control_region_busy;
395 hwif->straight8 = 0;
396 addr = hwif->io_ports[IDE_DATA_OFFSET];
397 if ((addr | 7) == hwif->io_ports[IDE_STATUS_OFFSET]) {
398 if (!hwif_request_region(hwif, addr, 8))
399 goto data_region_busy;
400 hwif->straight8 = 1;
401 return 0;
402 }
403 for (i = IDE_DATA_OFFSET; i <= IDE_STATUS_OFFSET; i++) {
404 addr = hwif->io_ports[i];
405 if (!hwif_request_region(hwif, addr, 1)) {
406 while (--i)
407 release_region(addr, 1);
408 goto data_region_busy;
409 }
410 }
411 return 0;
412
413 data_region_busy:
414 addr = hwif->io_ports[IDE_CONTROL_OFFSET];
415 if (addr)
416 release_region(addr, 1);
417 control_region_busy:
418 /* If any errors are return, we drop the hwif interface. */
419 return -EBUSY;
420 }
421
422 /**
423 * ide_hwif_release_regions - free IDE resources
424 *
425 * Note that we only release the standard ports,
426 * and do not even try to handle any extra ports
427 * allocated for weird IDE interface chipsets.
428 *
429 * Note also that we don't yet handle mmio resources here. More
430 * importantly our caller should be doing this so we need to
431 * restructure this as a helper function for drivers.
432 */
433
434 void ide_hwif_release_regions(ide_hwif_t *hwif)
435 {
436 u32 i = 0;
437
438 if (hwif->mmio == 2)
439 return;
440 if (hwif->io_ports[IDE_CONTROL_OFFSET])
441 release_region(hwif->io_ports[IDE_CONTROL_OFFSET], 1);
442 if (hwif->straight8) {
443 release_region(hwif->io_ports[IDE_DATA_OFFSET], 8);
444 return;
445 }
446 for (i = IDE_DATA_OFFSET; i <= IDE_STATUS_OFFSET; i++)
447 if (hwif->io_ports[i])
448 release_region(hwif->io_ports[i], 1);
449 }
450
451 /**
452 * ide_hwif_restore - restore hwif to template
453 * @hwif: hwif to update
454 * @tmp_hwif: template
455 *
456 * Restore hwif to a previous state by copying most settngs
457 * from the template.
458 */
459
460 static void ide_hwif_restore(ide_hwif_t *hwif, ide_hwif_t *tmp_hwif)
461 {
462 hwif->hwgroup = tmp_hwif->hwgroup;
463
464 hwif->gendev.parent = tmp_hwif->gendev.parent;
465
466 hwif->proc = tmp_hwif->proc;
467
468 hwif->major = tmp_hwif->major;
469 hwif->straight8 = tmp_hwif->straight8;
470 hwif->bus_state = tmp_hwif->bus_state;
471
472 hwif->atapi_dma = tmp_hwif->atapi_dma;
473 hwif->ultra_mask = tmp_hwif->ultra_mask;
474 hwif->mwdma_mask = tmp_hwif->mwdma_mask;
475 hwif->swdma_mask = tmp_hwif->swdma_mask;
476
477 hwif->chipset = tmp_hwif->chipset;
478 hwif->hold = tmp_hwif->hold;
479
480 #ifdef CONFIG_BLK_DEV_IDEPCI
481 hwif->pci_dev = tmp_hwif->pci_dev;
482 hwif->cds = tmp_hwif->cds;
483 #endif
484
485 hwif->tuneproc = tmp_hwif->tuneproc;
486 hwif->speedproc = tmp_hwif->speedproc;
487 hwif->selectproc = tmp_hwif->selectproc;
488 hwif->reset_poll = tmp_hwif->reset_poll;
489 hwif->pre_reset = tmp_hwif->pre_reset;
490 hwif->resetproc = tmp_hwif->resetproc;
491 hwif->intrproc = tmp_hwif->intrproc;
492 hwif->maskproc = tmp_hwif->maskproc;
493 hwif->quirkproc = tmp_hwif->quirkproc;
494 hwif->busproc = tmp_hwif->busproc;
495
496 hwif->ata_input_data = tmp_hwif->ata_input_data;
497 hwif->ata_output_data = tmp_hwif->ata_output_data;
498 hwif->atapi_input_bytes = tmp_hwif->atapi_input_bytes;
499 hwif->atapi_output_bytes = tmp_hwif->atapi_output_bytes;
500
501 hwif->dma_setup = tmp_hwif->dma_setup;
502 hwif->dma_exec_cmd = tmp_hwif->dma_exec_cmd;
503 hwif->dma_start = tmp_hwif->dma_start;
504 hwif->ide_dma_end = tmp_hwif->ide_dma_end;
505 hwif->ide_dma_check = tmp_hwif->ide_dma_check;
506 hwif->ide_dma_on = tmp_hwif->ide_dma_on;
507 hwif->ide_dma_off_quietly = tmp_hwif->ide_dma_off_quietly;
508 hwif->ide_dma_test_irq = tmp_hwif->ide_dma_test_irq;
509 hwif->ide_dma_host_on = tmp_hwif->ide_dma_host_on;
510 hwif->ide_dma_host_off = tmp_hwif->ide_dma_host_off;
511 hwif->ide_dma_lostirq = tmp_hwif->ide_dma_lostirq;
512 hwif->ide_dma_timeout = tmp_hwif->ide_dma_timeout;
513
514 hwif->OUTB = tmp_hwif->OUTB;
515 hwif->OUTBSYNC = tmp_hwif->OUTBSYNC;
516 hwif->OUTW = tmp_hwif->OUTW;
517 hwif->OUTL = tmp_hwif->OUTL;
518 hwif->OUTSW = tmp_hwif->OUTSW;
519 hwif->OUTSL = tmp_hwif->OUTSL;
520
521 hwif->INB = tmp_hwif->INB;
522 hwif->INW = tmp_hwif->INW;
523 hwif->INL = tmp_hwif->INL;
524 hwif->INSW = tmp_hwif->INSW;
525 hwif->INSL = tmp_hwif->INSL;
526
527 hwif->sg_max_nents = tmp_hwif->sg_max_nents;
528
529 hwif->mmio = tmp_hwif->mmio;
530 hwif->rqsize = tmp_hwif->rqsize;
531 hwif->no_lba48 = tmp_hwif->no_lba48;
532
533 #ifndef CONFIG_BLK_DEV_IDECS
534 hwif->irq = tmp_hwif->irq;
535 #endif
536
537 hwif->dma_base = tmp_hwif->dma_base;
538 hwif->dma_master = tmp_hwif->dma_master;
539 hwif->dma_command = tmp_hwif->dma_command;
540 hwif->dma_vendor1 = tmp_hwif->dma_vendor1;
541 hwif->dma_status = tmp_hwif->dma_status;
542 hwif->dma_vendor3 = tmp_hwif->dma_vendor3;
543 hwif->dma_prdtable = tmp_hwif->dma_prdtable;
544
545 hwif->dma_extra = tmp_hwif->dma_extra;
546 hwif->config_data = tmp_hwif->config_data;
547 hwif->select_data = tmp_hwif->select_data;
548 hwif->autodma = tmp_hwif->autodma;
549 hwif->udma_four = tmp_hwif->udma_four;
550 hwif->no_dsc = tmp_hwif->no_dsc;
551
552 hwif->hwif_data = tmp_hwif->hwif_data;
553 }
554
555 /**
556 * ide_unregister - free an ide interface
557 * @index: index of interface (will change soon to a pointer)
558 *
559 * Perform the final unregister of an IDE interface. At the moment
560 * we don't refcount interfaces so this will also get split up.
561 *
562 * Locking:
563 * The caller must not hold the IDE locks
564 * The drive present/vanishing is not yet properly locked
565 * Take care with the callbacks. These have been split to avoid
566 * deadlocking the IDE layer. The shutdown callback is called
567 * before we take the lock and free resources. It is up to the
568 * caller to be sure there is no pending I/O here, and that
569 * the interfce will not be reopened (present/vanishing locking
570 * isnt yet done btw). After we commit to the final kill we
571 * call the cleanup callback with the ide locks held.
572 *
573 * Unregister restores the hwif structures to the default state.
574 * This is raving bonkers.
575 */
576
577 void ide_unregister(unsigned int index)
578 {
579 ide_drive_t *drive;
580 ide_hwif_t *hwif, *g;
581 static ide_hwif_t tmp_hwif; /* protected by ide_cfg_sem */
582 ide_hwgroup_t *hwgroup;
583 int irq_count = 0, unit;
584
585 BUG_ON(index >= MAX_HWIFS);
586
587 BUG_ON(in_interrupt());
588 BUG_ON(irqs_disabled());
589 down(&ide_cfg_sem);
590 spin_lock_irq(&ide_lock);
591 hwif = &ide_hwifs[index];
592 if (!hwif->present)
593 goto abort;
594 for (unit = 0; unit < MAX_DRIVES; ++unit) {
595 drive = &hwif->drives[unit];
596 if (!drive->present) {
597 if (drive->devfs_name[0] != '\0') {
598 devfs_remove(drive->devfs_name);
599 drive->devfs_name[0] = '\0';
600 }
601 continue;
602 }
603 spin_unlock_irq(&ide_lock);
604 device_unregister(&drive->gendev);
605 down(&drive->gendev_rel_sem);
606 spin_lock_irq(&ide_lock);
607 }
608 hwif->present = 0;
609
610 spin_unlock_irq(&ide_lock);
611
612 destroy_proc_ide_interface(hwif);
613
614 hwgroup = hwif->hwgroup;
615 /*
616 * free the irq if we were the only hwif using it
617 */
618 g = hwgroup->hwif;
619 do {
620 if (g->irq == hwif->irq)
621 ++irq_count;
622 g = g->next;
623 } while (g != hwgroup->hwif);
624 if (irq_count == 1)
625 free_irq(hwif->irq, hwgroup);
626
627 spin_lock_irq(&ide_lock);
628 /*
629 * Note that we only release the standard ports,
630 * and do not even try to handle any extra ports
631 * allocated for weird IDE interface chipsets.
632 */
633 ide_hwif_release_regions(hwif);
634
635 /*
636 * Remove us from the hwgroup, and free
637 * the hwgroup if we were the only member
638 */
639 if (hwif->next == hwif) {
640 BUG_ON(hwgroup->hwif != hwif);
641 kfree(hwgroup);
642 } else {
643 /* There is another interface in hwgroup.
644 * Unlink us, and set hwgroup->drive and ->hwif to
645 * something sane.
646 */
647 g = hwgroup->hwif;
648 while (g->next != hwif)
649 g = g->next;
650 g->next = hwif->next;
651 if (hwgroup->hwif == hwif) {
652 /* Chose a random hwif for hwgroup->hwif.
653 * It's guaranteed that there are no drives
654 * left in the hwgroup.
655 */
656 BUG_ON(hwgroup->drive != NULL);
657 hwgroup->hwif = g;
658 }
659 BUG_ON(hwgroup->hwif == hwif);
660 }
661
662 /* More messed up locking ... */
663 spin_unlock_irq(&ide_lock);
664 device_unregister(&hwif->gendev);
665 down(&hwif->gendev_rel_sem);
666
667 /*
668 * Remove us from the kernel's knowledge
669 */
670 blk_unregister_region(MKDEV(hwif->major, 0), MAX_DRIVES<<PARTN_BITS);
671 kfree(hwif->sg_table);
672 unregister_blkdev(hwif->major, hwif->name);
673 spin_lock_irq(&ide_lock);
674
675 if (hwif->dma_base) {
676 (void) ide_release_dma(hwif);
677
678 hwif->dma_base = 0;
679 hwif->dma_master = 0;
680 hwif->dma_command = 0;
681 hwif->dma_vendor1 = 0;
682 hwif->dma_status = 0;
683 hwif->dma_vendor3 = 0;
684 hwif->dma_prdtable = 0;
685 }
686
687 /* copy original settings */
688 tmp_hwif = *hwif;
689
690 /* restore hwif data to pristine status */
691 init_hwif_data(hwif, index);
692 init_hwif_default(hwif, index);
693
694 ide_hwif_restore(hwif, &tmp_hwif);
695
696 abort:
697 spin_unlock_irq(&ide_lock);
698 up(&ide_cfg_sem);
699 }
700
701 EXPORT_SYMBOL(ide_unregister);
702
703
704 /**
705 * ide_setup_ports - set up IDE interface ports
706 * @hw: register descriptions
707 * @base: base register
708 * @offsets: table of register offsets
709 * @ctrl: control register
710 * @ack_irq: IRQ ack
711 * @irq: interrupt lie
712 *
713 * Setup hw_regs_t structure described by parameters. You
714 * may set up the hw structure yourself OR use this routine to
715 * do it for you. This is basically a helper
716 *
717 */
718
719 void ide_setup_ports ( hw_regs_t *hw,
720 unsigned long base, int *offsets,
721 unsigned long ctrl, unsigned long intr,
722 ide_ack_intr_t *ack_intr,
723 /*
724 * ide_io_ops_t *iops,
725 */
726 int irq)
727 {
728 int i;
729
730 for (i = 0; i < IDE_NR_PORTS; i++) {
731 if (offsets[i] == -1) {
732 switch(i) {
733 case IDE_CONTROL_OFFSET:
734 hw->io_ports[i] = ctrl;
735 break;
736 #if defined(CONFIG_AMIGA) || defined(CONFIG_MAC)
737 case IDE_IRQ_OFFSET:
738 hw->io_ports[i] = intr;
739 break;
740 #endif /* (CONFIG_AMIGA) || (CONFIG_MAC) */
741 default:
742 hw->io_ports[i] = 0;
743 break;
744 }
745 } else {
746 hw->io_ports[i] = base + offsets[i];
747 }
748 }
749 hw->irq = irq;
750 hw->dma = NO_DMA;
751 hw->ack_intr = ack_intr;
752 /*
753 * hw->iops = iops;
754 */
755 }
756
757 /**
758 * ide_register_hw_with_fixup - register IDE interface
759 * @hw: hardware registers
760 * @hwifp: pointer to returned hwif
761 * @fixup: fixup function
762 *
763 * Register an IDE interface, specifying exactly the registers etc.
764 * Set init=1 iff calling before probes have taken place.
765 *
766 * Returns -1 on error.
767 */
768
769 int ide_register_hw_with_fixup(hw_regs_t *hw, ide_hwif_t **hwifp, void(*fixup)(ide_hwif_t *hwif))
770 {
771 int index, retry = 1;
772 ide_hwif_t *hwif;
773
774 do {
775 for (index = 0; index < MAX_HWIFS; ++index) {
776 hwif = &ide_hwifs[index];
777 if (hwif->hw.io_ports[IDE_DATA_OFFSET] == hw->io_ports[IDE_DATA_OFFSET])
778 goto found;
779 }
780 for (index = 0; index < MAX_HWIFS; ++index) {
781 hwif = &ide_hwifs[index];
782 if (hwif->hold)
783 continue;
784 if ((!hwif->present && !hwif->mate && !initializing) ||
785 (!hwif->hw.io_ports[IDE_DATA_OFFSET] && initializing))
786 goto found;
787 }
788 for (index = 0; index < MAX_HWIFS; index++)
789 ide_unregister(index);
790 } while (retry--);
791 return -1;
792 found:
793 if (hwif->present)
794 ide_unregister(index);
795 else if (!hwif->hold) {
796 init_hwif_data(hwif, index);
797 init_hwif_default(hwif, index);
798 }
799 if (hwif->present)
800 return -1;
801 memcpy(&hwif->hw, hw, sizeof(*hw));
802 memcpy(hwif->io_ports, hwif->hw.io_ports, sizeof(hwif->hw.io_ports));
803 hwif->irq = hw->irq;
804 hwif->noprobe = 0;
805 hwif->chipset = hw->chipset;
806
807 if (!initializing) {
808 probe_hwif_init_with_fixup(hwif, fixup);
809 create_proc_ide_interfaces();
810 }
811
812 if (hwifp)
813 *hwifp = hwif;
814
815 return (initializing || hwif->present) ? index : -1;
816 }
817
818 EXPORT_SYMBOL(ide_register_hw_with_fixup);
819
820 int ide_register_hw(hw_regs_t *hw, ide_hwif_t **hwifp)
821 {
822 return ide_register_hw_with_fixup(hw, hwifp, NULL);
823 }
824
825 EXPORT_SYMBOL(ide_register_hw);
826
827 /*
828 * Locks for IDE setting functionality
829 */
830
831 DECLARE_MUTEX(ide_setting_sem);
832
833 /**
834 * __ide_add_setting - add an ide setting option
835 * @drive: drive to use
836 * @name: setting name
837 * @rw: true if the function is read write
838 * @read_ioctl: function to call on read
839 * @write_ioctl: function to call on write
840 * @data_type: type of data
841 * @min: range minimum
842 * @max: range maximum
843 * @mul_factor: multiplication scale
844 * @div_factor: divison scale
845 * @data: private data field
846 * @set: setting
847 * @auto_remove: setting auto removal flag
848 *
849 * Removes the setting named from the device if it is present.
850 * The function takes the settings_lock to protect against
851 * parallel changes. This function must not be called from IRQ
852 * context. Returns 0 on success or -1 on failure.
853 *
854 * BUGS: This code is seriously over-engineered. There is also
855 * magic about how the driver specific features are setup. If
856 * a driver is attached we assume the driver settings are auto
857 * remove.
858 */
859
860 static int __ide_add_setting(ide_drive_t *drive, const char *name, int rw, int read_ioctl, int write_ioctl, int data_type, int min, int max, int mul_factor, int div_factor, void *data, ide_procset_t *set, int auto_remove)
861 {
862 ide_settings_t **p = (ide_settings_t **) &drive->settings, *setting = NULL;
863
864 down(&ide_setting_sem);
865 while ((*p) && strcmp((*p)->name, name) < 0)
866 p = &((*p)->next);
867 if ((setting = kzalloc(sizeof(*setting), GFP_KERNEL)) == NULL)
868 goto abort;
869 if ((setting->name = kmalloc(strlen(name) + 1, GFP_KERNEL)) == NULL)
870 goto abort;
871 strcpy(setting->name, name);
872 setting->rw = rw;
873 setting->read_ioctl = read_ioctl;
874 setting->write_ioctl = write_ioctl;
875 setting->data_type = data_type;
876 setting->min = min;
877 setting->max = max;
878 setting->mul_factor = mul_factor;
879 setting->div_factor = div_factor;
880 setting->data = data;
881 setting->set = set;
882
883 setting->next = *p;
884 if (auto_remove)
885 setting->auto_remove = 1;
886 *p = setting;
887 up(&ide_setting_sem);
888 return 0;
889 abort:
890 up(&ide_setting_sem);
891 kfree(setting);
892 return -1;
893 }
894
895 int ide_add_setting(ide_drive_t *drive, const char *name, int rw, int read_ioctl, int write_ioctl, int data_type, int min, int max, int mul_factor, int div_factor, void *data, ide_procset_t *set)
896 {
897 return __ide_add_setting(drive, name, rw, read_ioctl, write_ioctl, data_type, min, max, mul_factor, div_factor, data, set, 1);
898 }
899
900 EXPORT_SYMBOL(ide_add_setting);
901
902 /**
903 * __ide_remove_setting - remove an ide setting option
904 * @drive: drive to use
905 * @name: setting name
906 *
907 * Removes the setting named from the device if it is present.
908 * The caller must hold the setting semaphore.
909 */
910
911 static void __ide_remove_setting (ide_drive_t *drive, char *name)
912 {
913 ide_settings_t **p, *setting;
914
915 p = (ide_settings_t **) &drive->settings;
916
917 while ((*p) && strcmp((*p)->name, name))
918 p = &((*p)->next);
919 if ((setting = (*p)) == NULL)
920 return;
921
922 (*p) = setting->next;
923
924 kfree(setting->name);
925 kfree(setting);
926 }
927
928 /**
929 * ide_find_setting_by_ioctl - find a drive specific ioctl
930 * @drive: drive to scan
931 * @cmd: ioctl command to handle
932 *
933 * Scan's the device setting table for a matching entry and returns
934 * this or NULL if no entry is found. The caller must hold the
935 * setting semaphore
936 */
937
938 static ide_settings_t *ide_find_setting_by_ioctl (ide_drive_t *drive, int cmd)
939 {
940 ide_settings_t *setting = drive->settings;
941
942 while (setting) {
943 if (setting->read_ioctl == cmd || setting->write_ioctl == cmd)
944 break;
945 setting = setting->next;
946 }
947
948 return setting;
949 }
950
951 /**
952 * ide_find_setting_by_name - find a drive specific setting
953 * @drive: drive to scan
954 * @name: setting name
955 *
956 * Scan's the device setting table for a matching entry and returns
957 * this or NULL if no entry is found. The caller must hold the
958 * setting semaphore
959 */
960
961 ide_settings_t *ide_find_setting_by_name (ide_drive_t *drive, char *name)
962 {
963 ide_settings_t *setting = drive->settings;
964
965 while (setting) {
966 if (strcmp(setting->name, name) == 0)
967 break;
968 setting = setting->next;
969 }
970 return setting;
971 }
972
973 /**
974 * auto_remove_settings - remove driver specific settings
975 * @drive: drive
976 *
977 * Automatically remove all the driver specific settings for this
978 * drive. This function may sleep and must not be called from IRQ
979 * context. The caller must hold ide_setting_sem.
980 */
981
982 static void auto_remove_settings (ide_drive_t *drive)
983 {
984 ide_settings_t *setting;
985 repeat:
986 setting = drive->settings;
987 while (setting) {
988 if (setting->auto_remove) {
989 __ide_remove_setting(drive, setting->name);
990 goto repeat;
991 }
992 setting = setting->next;
993 }
994 }
995
996 /**
997 * ide_read_setting - read an IDE setting
998 * @drive: drive to read from
999 * @setting: drive setting
1000 *
1001 * Read a drive setting and return the value. The caller
1002 * must hold the ide_setting_sem when making this call.
1003 *
1004 * BUGS: the data return and error are the same return value
1005 * so an error -EINVAL and true return of the same value cannot
1006 * be told apart
1007 */
1008
1009 int ide_read_setting (ide_drive_t *drive, ide_settings_t *setting)
1010 {
1011 int val = -EINVAL;
1012 unsigned long flags;
1013
1014 if ((setting->rw & SETTING_READ)) {
1015 spin_lock_irqsave(&ide_lock, flags);
1016 switch(setting->data_type) {
1017 case TYPE_BYTE:
1018 val = *((u8 *) setting->data);
1019 break;
1020 case TYPE_SHORT:
1021 val = *((u16 *) setting->data);
1022 break;
1023 case TYPE_INT:
1024 case TYPE_INTA:
1025 val = *((u32 *) setting->data);
1026 break;
1027 }
1028 spin_unlock_irqrestore(&ide_lock, flags);
1029 }
1030 return val;
1031 }
1032
1033 /**
1034 * ide_spin_wait_hwgroup - wait for group
1035 * @drive: drive in the group
1036 *
1037 * Wait for an IDE device group to go non busy and then return
1038 * holding the ide_lock which guards the hwgroup->busy status
1039 * and right to use it.
1040 */
1041
1042 int ide_spin_wait_hwgroup (ide_drive_t *drive)
1043 {
1044 ide_hwgroup_t *hwgroup = HWGROUP(drive);
1045 unsigned long timeout = jiffies + (3 * HZ);
1046
1047 spin_lock_irq(&ide_lock);
1048
1049 while (hwgroup->busy) {
1050 unsigned long lflags;
1051 spin_unlock_irq(&ide_lock);
1052 local_irq_set(lflags);
1053 if (time_after(jiffies, timeout)) {
1054 local_irq_restore(lflags);
1055 printk(KERN_ERR "%s: channel busy\n", drive->name);
1056 return -EBUSY;
1057 }
1058 local_irq_restore(lflags);
1059 spin_lock_irq(&ide_lock);
1060 }
1061 return 0;
1062 }
1063
1064 EXPORT_SYMBOL(ide_spin_wait_hwgroup);
1065
1066 /**
1067 * ide_write_setting - read an IDE setting
1068 * @drive: drive to read from
1069 * @setting: drive setting
1070 * @val: value
1071 *
1072 * Write a drive setting if it is possible. The caller
1073 * must hold the ide_setting_sem when making this call.
1074 *
1075 * BUGS: the data return and error are the same return value
1076 * so an error -EINVAL and true return of the same value cannot
1077 * be told apart
1078 *
1079 * FIXME: This should be changed to enqueue a special request
1080 * to the driver to change settings, and then wait on a sema for completion.
1081 * The current scheme of polling is kludgy, though safe enough.
1082 */
1083
1084 int ide_write_setting (ide_drive_t *drive, ide_settings_t *setting, int val)
1085 {
1086 int i;
1087 u32 *p;
1088
1089 if (!capable(CAP_SYS_ADMIN))
1090 return -EACCES;
1091 if (!(setting->rw & SETTING_WRITE))
1092 return -EPERM;
1093 if (val < setting->min || val > setting->max)
1094 return -EINVAL;
1095 if (setting->set)
1096 return setting->set(drive, val);
1097 if (ide_spin_wait_hwgroup(drive))
1098 return -EBUSY;
1099 switch (setting->data_type) {
1100 case TYPE_BYTE:
1101 *((u8 *) setting->data) = val;
1102 break;
1103 case TYPE_SHORT:
1104 *((u16 *) setting->data) = val;
1105 break;
1106 case TYPE_INT:
1107 *((u32 *) setting->data) = val;
1108 break;
1109 case TYPE_INTA:
1110 p = (u32 *) setting->data;
1111 for (i = 0; i < 1 << PARTN_BITS; i++, p++)
1112 *p = val;
1113 break;
1114 }
1115 spin_unlock_irq(&ide_lock);
1116 return 0;
1117 }
1118
1119 static int set_io_32bit(ide_drive_t *drive, int arg)
1120 {
1121 drive->io_32bit = arg;
1122 #ifdef CONFIG_BLK_DEV_DTC2278
1123 if (HWIF(drive)->chipset == ide_dtc2278)
1124 HWIF(drive)->drives[!drive->select.b.unit].io_32bit = arg;
1125 #endif /* CONFIG_BLK_DEV_DTC2278 */
1126 return 0;
1127 }
1128
1129 static int set_using_dma (ide_drive_t *drive, int arg)
1130 {
1131 #ifdef CONFIG_BLK_DEV_IDEDMA
1132 if (!drive->id || !(drive->id->capability & 1))
1133 return -EPERM;
1134 if (HWIF(drive)->ide_dma_check == NULL)
1135 return -EPERM;
1136 if (arg) {
1137 if (HWIF(drive)->ide_dma_check(drive)) return -EIO;
1138 if (HWIF(drive)->ide_dma_on(drive)) return -EIO;
1139 } else {
1140 if (__ide_dma_off(drive))
1141 return -EIO;
1142 }
1143 return 0;
1144 #else
1145 return -EPERM;
1146 #endif
1147 }
1148
1149 static int set_pio_mode (ide_drive_t *drive, int arg)
1150 {
1151 struct request rq;
1152
1153 if (!HWIF(drive)->tuneproc)
1154 return -ENOSYS;
1155 if (drive->special.b.set_tune)
1156 return -EBUSY;
1157 ide_init_drive_cmd(&rq);
1158 drive->tune_req = (u8) arg;
1159 drive->special.b.set_tune = 1;
1160 (void) ide_do_drive_cmd(drive, &rq, ide_wait);
1161 return 0;
1162 }
1163
1164 static int set_xfer_rate (ide_drive_t *drive, int arg)
1165 {
1166 int err = ide_wait_cmd(drive,
1167 WIN_SETFEATURES, (u8) arg,
1168 SETFEATURES_XFER, 0, NULL);
1169
1170 if (!err && arg) {
1171 ide_set_xfer_rate(drive, (u8) arg);
1172 ide_driveid_update(drive);
1173 }
1174 return err;
1175 }
1176
1177 /**
1178 * ide_add_generic_settings - generic ide settings
1179 * @drive: drive being configured
1180 *
1181 * Add the generic parts of the system settings to the /proc files and
1182 * ioctls for this IDE device. The caller must not be holding the
1183 * ide_setting_sem.
1184 */
1185
1186 void ide_add_generic_settings (ide_drive_t *drive)
1187 {
1188 /*
1189 * drive setting name read/write access read ioctl write ioctl data type min max mul_factor div_factor data pointer set function
1190 */
1191 __ide_add_setting(drive, "io_32bit", drive->no_io_32bit ? SETTING_READ : SETTING_RW, HDIO_GET_32BIT, HDIO_SET_32BIT, TYPE_BYTE, 0, 1 + (SUPPORT_VLB_SYNC << 1), 1, 1, &drive->io_32bit, set_io_32bit, 0);
1192 __ide_add_setting(drive, "keepsettings", SETTING_RW, HDIO_GET_KEEPSETTINGS, HDIO_SET_KEEPSETTINGS, TYPE_BYTE, 0, 1, 1, 1, &drive->keep_settings, NULL, 0);
1193 __ide_add_setting(drive, "nice1", SETTING_RW, -1, -1, TYPE_BYTE, 0, 1, 1, 1, &drive->nice1, NULL, 0);
1194 __ide_add_setting(drive, "pio_mode", SETTING_WRITE, -1, HDIO_SET_PIO_MODE, TYPE_BYTE, 0, 255, 1, 1, NULL, set_pio_mode, 0);
1195 __ide_add_setting(drive, "unmaskirq", drive->no_unmask ? SETTING_READ : SETTING_RW, HDIO_GET_UNMASKINTR, HDIO_SET_UNMASKINTR, TYPE_BYTE, 0, 1, 1, 1, &drive->unmask, NULL, 0);
1196 __ide_add_setting(drive, "using_dma", SETTING_RW, HDIO_GET_DMA, HDIO_SET_DMA, TYPE_BYTE, 0, 1, 1, 1, &drive->using_dma, set_using_dma, 0);
1197 __ide_add_setting(drive, "init_speed", SETTING_RW, -1, -1, TYPE_BYTE, 0, 70, 1, 1, &drive->init_speed, NULL, 0);
1198 __ide_add_setting(drive, "current_speed", SETTING_RW, -1, -1, TYPE_BYTE, 0, 70, 1, 1, &drive->current_speed, set_xfer_rate, 0);
1199 __ide_add_setting(drive, "number", SETTING_RW, -1, -1, TYPE_BYTE, 0, 3, 1, 1, &drive->dn, NULL, 0);
1200 }
1201
1202 /**
1203 * system_bus_clock - clock guess
1204 *
1205 * External version of the bus clock guess used by very old IDE drivers
1206 * for things like VLB timings. Should not be used.
1207 */
1208
1209 int system_bus_clock (void)
1210 {
1211 return((int) ((!system_bus_speed) ? ide_system_bus_speed() : system_bus_speed ));
1212 }
1213
1214 EXPORT_SYMBOL(system_bus_clock);
1215
1216 static int generic_ide_suspend(struct device *dev, pm_message_t state)
1217 {
1218 ide_drive_t *drive = dev->driver_data;
1219 struct request rq;
1220 struct request_pm_state rqpm;
1221 ide_task_t args;
1222
1223 memset(&rq, 0, sizeof(rq));
1224 memset(&rqpm, 0, sizeof(rqpm));
1225 memset(&args, 0, sizeof(args));
1226 rq.flags = REQ_PM_SUSPEND;
1227 rq.special = &args;
1228 rq.pm = &rqpm;
1229 rqpm.pm_step = ide_pm_state_start_suspend;
1230 rqpm.pm_state = state.event;
1231
1232 return ide_do_drive_cmd(drive, &rq, ide_wait);
1233 }
1234
1235 static int generic_ide_resume(struct device *dev)
1236 {
1237 ide_drive_t *drive = dev->driver_data;
1238 struct request rq;
1239 struct request_pm_state rqpm;
1240 ide_task_t args;
1241
1242 memset(&rq, 0, sizeof(rq));
1243 memset(&rqpm, 0, sizeof(rqpm));
1244 memset(&args, 0, sizeof(args));
1245 rq.flags = REQ_PM_RESUME;
1246 rq.special = &args;
1247 rq.pm = &rqpm;
1248 rqpm.pm_step = ide_pm_state_start_resume;
1249 rqpm.pm_state = PM_EVENT_ON;
1250
1251 return ide_do_drive_cmd(drive, &rq, ide_head_wait);
1252 }
1253
1254 int generic_ide_ioctl(ide_drive_t *drive, struct file *file, struct block_device *bdev,
1255 unsigned int cmd, unsigned long arg)
1256 {
1257 ide_settings_t *setting;
1258 ide_driver_t *drv;
1259 int err = 0;
1260 void __user *p = (void __user *)arg;
1261
1262 down(&ide_setting_sem);
1263 if ((setting = ide_find_setting_by_ioctl(drive, cmd)) != NULL) {
1264 if (cmd == setting->read_ioctl) {
1265 err = ide_read_setting(drive, setting);
1266 up(&ide_setting_sem);
1267 return err >= 0 ? put_user(err, (long __user *)arg) : err;
1268 } else {
1269 if (bdev != bdev->bd_contains)
1270 err = -EINVAL;
1271 else
1272 err = ide_write_setting(drive, setting, arg);
1273 up(&ide_setting_sem);
1274 return err;
1275 }
1276 }
1277 up(&ide_setting_sem);
1278
1279 switch (cmd) {
1280 case HDIO_GETGEO:
1281 {
1282 struct hd_geometry geom;
1283 if (!p || (drive->media != ide_disk && drive->media != ide_floppy)) return -EINVAL;
1284 geom.heads = drive->bios_head;
1285 geom.sectors = drive->bios_sect;
1286 geom.cylinders = (u16)drive->bios_cyl; /* truncate */
1287 geom.start = get_start_sect(bdev);
1288 if (copy_to_user(p, &geom, sizeof(struct hd_geometry)))
1289 return -EFAULT;
1290 return 0;
1291 }
1292
1293 case HDIO_OBSOLETE_IDENTITY:
1294 case HDIO_GET_IDENTITY:
1295 if (bdev != bdev->bd_contains)
1296 return -EINVAL;
1297 if (drive->id_read == 0)
1298 return -ENOMSG;
1299 if (copy_to_user(p, drive->id, (cmd == HDIO_GET_IDENTITY) ? sizeof(*drive->id) : 142))
1300 return -EFAULT;
1301 return 0;
1302
1303 case HDIO_GET_NICE:
1304 return put_user(drive->dsc_overlap << IDE_NICE_DSC_OVERLAP |
1305 drive->atapi_overlap << IDE_NICE_ATAPI_OVERLAP |
1306 drive->nice0 << IDE_NICE_0 |
1307 drive->nice1 << IDE_NICE_1 |
1308 drive->nice2 << IDE_NICE_2,
1309 (long __user *) arg);
1310
1311 #ifdef CONFIG_IDE_TASK_IOCTL
1312 case HDIO_DRIVE_TASKFILE:
1313 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
1314 return -EACCES;
1315 switch(drive->media) {
1316 case ide_disk:
1317 return ide_taskfile_ioctl(drive, cmd, arg);
1318 default:
1319 return -ENOMSG;
1320 }
1321 #endif /* CONFIG_IDE_TASK_IOCTL */
1322
1323 case HDIO_DRIVE_CMD:
1324 if (!capable(CAP_SYS_RAWIO))
1325 return -EACCES;
1326 return ide_cmd_ioctl(drive, cmd, arg);
1327
1328 case HDIO_DRIVE_TASK:
1329 if (!capable(CAP_SYS_RAWIO))
1330 return -EACCES;
1331 return ide_task_ioctl(drive, cmd, arg);
1332
1333 case HDIO_SCAN_HWIF:
1334 {
1335 hw_regs_t hw;
1336 int args[3];
1337 if (!capable(CAP_SYS_RAWIO)) return -EACCES;
1338 if (copy_from_user(args, p, 3 * sizeof(int)))
1339 return -EFAULT;
1340 memset(&hw, 0, sizeof(hw));
1341 ide_init_hwif_ports(&hw, (unsigned long) args[0],
1342 (unsigned long) args[1], NULL);
1343 hw.irq = args[2];
1344 if (ide_register_hw(&hw, NULL) == -1)
1345 return -EIO;
1346 return 0;
1347 }
1348 case HDIO_UNREGISTER_HWIF:
1349 if (!capable(CAP_SYS_RAWIO)) return -EACCES;
1350 /* (arg > MAX_HWIFS) checked in function */
1351 ide_unregister(arg);
1352 return 0;
1353 case HDIO_SET_NICE:
1354 if (!capable(CAP_SYS_ADMIN)) return -EACCES;
1355 if (arg != (arg & ((1 << IDE_NICE_DSC_OVERLAP) | (1 << IDE_NICE_1))))
1356 return -EPERM;
1357 drive->dsc_overlap = (arg >> IDE_NICE_DSC_OVERLAP) & 1;
1358 drv = *(ide_driver_t **)bdev->bd_disk->private_data;
1359 if (drive->dsc_overlap && !drv->supports_dsc_overlap) {
1360 drive->dsc_overlap = 0;
1361 return -EPERM;
1362 }
1363 drive->nice1 = (arg >> IDE_NICE_1) & 1;
1364 return 0;
1365 case HDIO_DRIVE_RESET:
1366 {
1367 unsigned long flags;
1368 if (!capable(CAP_SYS_ADMIN)) return -EACCES;
1369
1370 /*
1371 * Abort the current command on the
1372 * group if there is one, taking
1373 * care not to allow anything else
1374 * to be queued and to die on the
1375 * spot if we miss one somehow
1376 */
1377
1378 spin_lock_irqsave(&ide_lock, flags);
1379
1380 ide_abort(drive, "drive reset");
1381
1382 if(HWGROUP(drive)->handler)
1383 BUG();
1384
1385 /* Ensure nothing gets queued after we
1386 drop the lock. Reset will clear the busy */
1387
1388 HWGROUP(drive)->busy = 1;
1389 spin_unlock_irqrestore(&ide_lock, flags);
1390 (void) ide_do_reset(drive);
1391
1392 return 0;
1393 }
1394
1395 case CDROMEJECT:
1396 case CDROMCLOSETRAY:
1397 return scsi_cmd_ioctl(file, bdev->bd_disk, cmd, p);
1398
1399 case HDIO_GET_BUSSTATE:
1400 if (!capable(CAP_SYS_ADMIN))
1401 return -EACCES;
1402 if (put_user(HWIF(drive)->bus_state, (long __user *)arg))
1403 return -EFAULT;
1404 return 0;
1405
1406 case HDIO_SET_BUSSTATE:
1407 if (!capable(CAP_SYS_ADMIN))
1408 return -EACCES;
1409 if (HWIF(drive)->busproc)
1410 return HWIF(drive)->busproc(drive, (int)arg);
1411 return -EOPNOTSUPP;
1412 default:
1413 return -EINVAL;
1414 }
1415 }
1416
1417 EXPORT_SYMBOL(generic_ide_ioctl);
1418
1419 /*
1420 * stridx() returns the offset of c within s,
1421 * or -1 if c is '\0' or not found within s.
1422 */
1423 static int __init stridx (const char *s, char c)
1424 {
1425 char *i = strchr(s, c);
1426 return (i && c) ? i - s : -1;
1427 }
1428
1429 /*
1430 * match_parm() does parsing for ide_setup():
1431 *
1432 * 1. the first char of s must be '='.
1433 * 2. if the remainder matches one of the supplied keywords,
1434 * the index (1 based) of the keyword is negated and returned.
1435 * 3. if the remainder is a series of no more than max_vals numbers
1436 * separated by commas, the numbers are saved in vals[] and a
1437 * count of how many were saved is returned. Base10 is assumed,
1438 * and base16 is allowed when prefixed with "0x".
1439 * 4. otherwise, zero is returned.
1440 */
1441 static int __init match_parm (char *s, const char *keywords[], int vals[], int max_vals)
1442 {
1443 static const char *decimal = "0123456789";
1444 static const char *hex = "0123456789abcdef";
1445 int i, n;
1446
1447 if (*s++ == '=') {
1448 /*
1449 * Try matching against the supplied keywords,
1450 * and return -(index+1) if we match one
1451 */
1452 if (keywords != NULL) {
1453 for (i = 0; *keywords != NULL; ++i) {
1454 if (!strcmp(s, *keywords++))
1455 return -(i+1);
1456 }
1457 }
1458 /*
1459 * Look for a series of no more than "max_vals"
1460 * numeric values separated by commas, in base10,
1461 * or base16 when prefixed with "0x".
1462 * Return a count of how many were found.
1463 */
1464 for (n = 0; (i = stridx(decimal, *s)) >= 0;) {
1465 vals[n] = i;
1466 while ((i = stridx(decimal, *++s)) >= 0)
1467 vals[n] = (vals[n] * 10) + i;
1468 if (*s == 'x' && !vals[n]) {
1469 while ((i = stridx(hex, *++s)) >= 0)
1470 vals[n] = (vals[n] * 0x10) + i;
1471 }
1472 if (++n == max_vals)
1473 break;
1474 if (*s == ',' || *s == ';')
1475 ++s;
1476 }
1477 if (!*s)
1478 return n;
1479 }
1480 return 0; /* zero = nothing matched */
1481 }
1482
1483 #ifdef CONFIG_BLK_DEV_ALI14XX
1484 static int __initdata probe_ali14xx;
1485 extern int ali14xx_init(void);
1486 #endif
1487 #ifdef CONFIG_BLK_DEV_UMC8672
1488 static int __initdata probe_umc8672;
1489 extern int umc8672_init(void);
1490 #endif
1491 #ifdef CONFIG_BLK_DEV_DTC2278
1492 static int __initdata probe_dtc2278;
1493 extern int dtc2278_init(void);
1494 #endif
1495 #ifdef CONFIG_BLK_DEV_HT6560B
1496 static int __initdata probe_ht6560b;
1497 extern int ht6560b_init(void);
1498 #endif
1499 #ifdef CONFIG_BLK_DEV_QD65XX
1500 static int __initdata probe_qd65xx;
1501 extern int qd65xx_init(void);
1502 #endif
1503
1504 static int __initdata is_chipset_set[MAX_HWIFS];
1505
1506 /*
1507 * ide_setup() gets called VERY EARLY during initialization,
1508 * to handle kernel "command line" strings beginning with "hdx=" or "ide".
1509 *
1510 * Remember to update Documentation/ide.txt if you change something here.
1511 */
1512 static int __init ide_setup(char *s)
1513 {
1514 int i, vals[3];
1515 ide_hwif_t *hwif;
1516 ide_drive_t *drive;
1517 unsigned int hw, unit;
1518 const char max_drive = 'a' + ((MAX_HWIFS * MAX_DRIVES) - 1);
1519 const char max_hwif = '0' + (MAX_HWIFS - 1);
1520
1521
1522 if (strncmp(s,"hd",2) == 0 && s[2] == '=') /* hd= is for hd.c */
1523 return 0; /* driver and not us */
1524
1525 if (strncmp(s,"ide",3) && strncmp(s,"idebus",6) && strncmp(s,"hd",2))
1526 return 0;
1527
1528 printk(KERN_INFO "ide_setup: %s", s);
1529 init_ide_data ();
1530
1531 #ifdef CONFIG_BLK_DEV_IDEDOUBLER
1532 if (!strcmp(s, "ide=doubler")) {
1533 extern int ide_doubler;
1534
1535 printk(" : Enabled support for IDE doublers\n");
1536 ide_doubler = 1;
1537 return 1;
1538 }
1539 #endif /* CONFIG_BLK_DEV_IDEDOUBLER */
1540
1541 if (!strcmp(s, "ide=nodma")) {
1542 printk(" : Prevented DMA\n");
1543 noautodma = 1;
1544 return 1;
1545 }
1546
1547 #ifdef CONFIG_BLK_DEV_IDEPCI
1548 if (!strcmp(s, "ide=reverse")) {
1549 ide_scan_direction = 1;
1550 printk(" : Enabled support for IDE inverse scan order.\n");
1551 return 1;
1552 }
1553 #endif /* CONFIG_BLK_DEV_IDEPCI */
1554
1555 /*
1556 * Look for drive options: "hdx="
1557 */
1558 if (s[0] == 'h' && s[1] == 'd' && s[2] >= 'a' && s[2] <= max_drive) {
1559 const char *hd_words[] = {
1560 "none", "noprobe", "nowerr", "cdrom", "serialize",
1561 "autotune", "noautotune", "minus8", "swapdata", "bswap",
1562 "minus11", "remap", "remap63", "scsi", NULL };
1563 unit = s[2] - 'a';
1564 hw = unit / MAX_DRIVES;
1565 unit = unit % MAX_DRIVES;
1566 hwif = &ide_hwifs[hw];
1567 drive = &hwif->drives[unit];
1568 if (strncmp(s + 4, "ide-", 4) == 0) {
1569 strlcpy(drive->driver_req, s + 4, sizeof(drive->driver_req));
1570 goto done;
1571 }
1572 switch (match_parm(&s[3], hd_words, vals, 3)) {
1573 case -1: /* "none" */
1574 case -2: /* "noprobe" */
1575 drive->noprobe = 1;
1576 goto done;
1577 case -3: /* "nowerr" */
1578 drive->bad_wstat = BAD_R_STAT;
1579 hwif->noprobe = 0;
1580 goto done;
1581 case -4: /* "cdrom" */
1582 drive->present = 1;
1583 drive->media = ide_cdrom;
1584 /* an ATAPI device ignores DRDY */
1585 drive->ready_stat = 0;
1586 hwif->noprobe = 0;
1587 goto done;
1588 case -5: /* "serialize" */
1589 printk(" -- USE \"ide%d=serialize\" INSTEAD", hw);
1590 goto do_serialize;
1591 case -6: /* "autotune" */
1592 drive->autotune = IDE_TUNE_AUTO;
1593 goto obsolete_option;
1594 case -7: /* "noautotune" */
1595 drive->autotune = IDE_TUNE_NOAUTO;
1596 goto obsolete_option;
1597 case -9: /* "swapdata" */
1598 case -10: /* "bswap" */
1599 drive->bswap = 1;
1600 goto done;
1601 case -12: /* "remap" */
1602 drive->remap_0_to_1 = 1;
1603 goto done;
1604 case -13: /* "remap63" */
1605 drive->sect0 = 63;
1606 goto done;
1607 case -14: /* "scsi" */
1608 drive->scsi = 1;
1609 goto done;
1610 case 3: /* cyl,head,sect */
1611 drive->media = ide_disk;
1612 drive->ready_stat = READY_STAT;
1613 drive->cyl = drive->bios_cyl = vals[0];
1614 drive->head = drive->bios_head = vals[1];
1615 drive->sect = drive->bios_sect = vals[2];
1616 drive->present = 1;
1617 drive->forced_geom = 1;
1618 hwif->noprobe = 0;
1619 goto done;
1620 default:
1621 goto bad_option;
1622 }
1623 }
1624
1625 if (s[0] != 'i' || s[1] != 'd' || s[2] != 'e')
1626 goto bad_option;
1627 /*
1628 * Look for bus speed option: "idebus="
1629 */
1630 if (s[3] == 'b' && s[4] == 'u' && s[5] == 's') {
1631 if (match_parm(&s[6], NULL, vals, 1) != 1)
1632 goto bad_option;
1633 if (vals[0] >= 20 && vals[0] <= 66) {
1634 idebus_parameter = vals[0];
1635 } else
1636 printk(" -- BAD BUS SPEED! Expected value from 20 to 66");
1637 goto done;
1638 }
1639 /*
1640 * Look for interface options: "idex="
1641 */
1642 if (s[3] >= '0' && s[3] <= max_hwif) {
1643 /*
1644 * Be VERY CAREFUL changing this: note hardcoded indexes below
1645 * (-8, -9, -10) are reserved to ease the hardcoding.
1646 */
1647 static const char *ide_words[] = {
1648 "noprobe", "serialize", "autotune", "noautotune",
1649 "reset", "dma", "ata66", "minus8", "minus9",
1650 "minus10", "four", "qd65xx", "ht6560b", "cmd640_vlb",
1651 "dtc2278", "umc8672", "ali14xx", NULL };
1652 hw = s[3] - '0';
1653 hwif = &ide_hwifs[hw];
1654 i = match_parm(&s[4], ide_words, vals, 3);
1655
1656 /*
1657 * Cryptic check to ensure chipset not already set for hwif.
1658 * Note: we can't depend on hwif->chipset here.
1659 */
1660 if ((i >= -18 && i <= -11) || (i > 0 && i <= 3)) {
1661 /* chipset already specified */
1662 if (is_chipset_set[hw])
1663 goto bad_option;
1664 if (i > -18 && i <= -11) {
1665 /* these drivers are for "ide0=" only */
1666 if (hw != 0)
1667 goto bad_hwif;
1668 /* chipset already specified for 2nd port */
1669 if (is_chipset_set[hw+1])
1670 goto bad_option;
1671 }
1672 is_chipset_set[hw] = 1;
1673 printk("\n");
1674 }
1675
1676 switch (i) {
1677 #ifdef CONFIG_BLK_DEV_ALI14XX
1678 case -17: /* "ali14xx" */
1679 probe_ali14xx = 1;
1680 goto done;
1681 #endif
1682 #ifdef CONFIG_BLK_DEV_UMC8672
1683 case -16: /* "umc8672" */
1684 probe_umc8672 = 1;
1685 goto done;
1686 #endif
1687 #ifdef CONFIG_BLK_DEV_DTC2278
1688 case -15: /* "dtc2278" */
1689 probe_dtc2278 = 1;
1690 goto done;
1691 #endif
1692 #ifdef CONFIG_BLK_DEV_CMD640
1693 case -14: /* "cmd640_vlb" */
1694 {
1695 extern int cmd640_vlb; /* flag for cmd640.c */
1696 cmd640_vlb = 1;
1697 goto done;
1698 }
1699 #endif
1700 #ifdef CONFIG_BLK_DEV_HT6560B
1701 case -13: /* "ht6560b" */
1702 probe_ht6560b = 1;
1703 goto done;
1704 #endif
1705 #ifdef CONFIG_BLK_DEV_QD65XX
1706 case -12: /* "qd65xx" */
1707 probe_qd65xx = 1;
1708 goto done;
1709 #endif
1710 #ifdef CONFIG_BLK_DEV_4DRIVES
1711 case -11: /* "four" drives on one set of ports */
1712 {
1713 ide_hwif_t *mate = &ide_hwifs[hw^1];
1714 mate->drives[0].select.all ^= 0x20;
1715 mate->drives[1].select.all ^= 0x20;
1716 hwif->chipset = mate->chipset = ide_4drives;
1717 mate->irq = hwif->irq;
1718 memcpy(mate->io_ports, hwif->io_ports, sizeof(hwif->io_ports));
1719 goto do_serialize;
1720 }
1721 #endif /* CONFIG_BLK_DEV_4DRIVES */
1722 case -10: /* minus10 */
1723 case -9: /* minus9 */
1724 case -8: /* minus8 */
1725 goto bad_option;
1726 case -7: /* ata66 */
1727 #ifdef CONFIG_BLK_DEV_IDEPCI
1728 hwif->udma_four = 1;
1729 goto obsolete_option;
1730 #else
1731 goto bad_hwif;
1732 #endif
1733 case -6: /* dma */
1734 hwif->autodma = 1;
1735 goto obsolete_option;
1736 case -5: /* "reset" */
1737 hwif->reset = 1;
1738 goto obsolete_option;
1739 case -4: /* "noautotune" */
1740 hwif->drives[0].autotune = IDE_TUNE_NOAUTO;
1741 hwif->drives[1].autotune = IDE_TUNE_NOAUTO;
1742 goto obsolete_option;
1743 case -3: /* "autotune" */
1744 hwif->drives[0].autotune = IDE_TUNE_AUTO;
1745 hwif->drives[1].autotune = IDE_TUNE_AUTO;
1746 goto obsolete_option;
1747 case -2: /* "serialize" */
1748 do_serialize:
1749 hwif->mate = &ide_hwifs[hw^1];
1750 hwif->mate->mate = hwif;
1751 hwif->serialized = hwif->mate->serialized = 1;
1752 goto obsolete_option;
1753
1754 case -1: /* "noprobe" */
1755 hwif->noprobe = 1;
1756 goto done;
1757
1758 case 1: /* base */
1759 vals[1] = vals[0] + 0x206; /* default ctl */
1760 case 2: /* base,ctl */
1761 vals[2] = 0; /* default irq = probe for it */
1762 case 3: /* base,ctl,irq */
1763 hwif->hw.irq = vals[2];
1764 ide_init_hwif_ports(&hwif->hw, (unsigned long) vals[0], (unsigned long) vals[1], &hwif->irq);
1765 memcpy(hwif->io_ports, hwif->hw.io_ports, sizeof(hwif->io_ports));
1766 hwif->irq = vals[2];
1767 hwif->noprobe = 0;
1768 hwif->chipset = ide_forced;
1769 goto obsolete_option;
1770
1771 case 0: goto bad_option;
1772 default:
1773 printk(" -- SUPPORT NOT CONFIGURED IN THIS KERNEL\n");
1774 return 1;
1775 }
1776 }
1777 bad_option:
1778 printk(" -- BAD OPTION\n");
1779 return 1;
1780 obsolete_option:
1781 printk(" -- OBSOLETE OPTION, WILL BE REMOVED SOON!\n");
1782 return 1;
1783 bad_hwif:
1784 printk("-- NOT SUPPORTED ON ide%d", hw);
1785 done:
1786 printk("\n");
1787 return 1;
1788 }
1789
1790 extern void pnpide_init(void);
1791 extern void h8300_ide_init(void);
1792
1793 /*
1794 * probe_for_hwifs() finds/initializes "known" IDE interfaces
1795 */
1796 static void __init probe_for_hwifs (void)
1797 {
1798 #ifdef CONFIG_BLK_DEV_IDEPCI
1799 ide_scan_pcibus(ide_scan_direction);
1800 #endif /* CONFIG_BLK_DEV_IDEPCI */
1801
1802 #ifdef CONFIG_ETRAX_IDE
1803 {
1804 extern void init_e100_ide(void);
1805 init_e100_ide();
1806 }
1807 #endif /* CONFIG_ETRAX_IDE */
1808 #ifdef CONFIG_BLK_DEV_CMD640
1809 {
1810 extern void ide_probe_for_cmd640x(void);
1811 ide_probe_for_cmd640x();
1812 }
1813 #endif /* CONFIG_BLK_DEV_CMD640 */
1814 #ifdef CONFIG_BLK_DEV_IDE_PMAC
1815 {
1816 extern void pmac_ide_probe(void);
1817 pmac_ide_probe();
1818 }
1819 #endif /* CONFIG_BLK_DEV_IDE_PMAC */
1820 #ifdef CONFIG_BLK_DEV_GAYLE
1821 {
1822 extern void gayle_init(void);
1823 gayle_init();
1824 }
1825 #endif /* CONFIG_BLK_DEV_GAYLE */
1826 #ifdef CONFIG_BLK_DEV_FALCON_IDE
1827 {
1828 extern void falconide_init(void);
1829 falconide_init();
1830 }
1831 #endif /* CONFIG_BLK_DEV_FALCON_IDE */
1832 #ifdef CONFIG_BLK_DEV_MAC_IDE
1833 {
1834 extern void macide_init(void);
1835 macide_init();
1836 }
1837 #endif /* CONFIG_BLK_DEV_MAC_IDE */
1838 #ifdef CONFIG_BLK_DEV_Q40IDE
1839 {
1840 extern void q40ide_init(void);
1841 q40ide_init();
1842 }
1843 #endif /* CONFIG_BLK_DEV_Q40IDE */
1844 #ifdef CONFIG_BLK_DEV_BUDDHA
1845 {
1846 extern void buddha_init(void);
1847 buddha_init();
1848 }
1849 #endif /* CONFIG_BLK_DEV_BUDDHA */
1850 #ifdef CONFIG_BLK_DEV_IDEPNP
1851 pnpide_init();
1852 #endif
1853 #ifdef CONFIG_H8300
1854 h8300_ide_init();
1855 #endif
1856 }
1857
1858 void ide_register_subdriver(ide_drive_t *drive, ide_driver_t *driver)
1859 {
1860 #ifdef CONFIG_PROC_FS
1861 ide_add_proc_entries(drive->proc, driver->proc, drive);
1862 #endif
1863 }
1864
1865 EXPORT_SYMBOL(ide_register_subdriver);
1866
1867 /**
1868 * ide_unregister_subdriver - disconnect drive from driver
1869 * @drive: drive to unplug
1870 * @driver: driver
1871 *
1872 * Disconnect a drive from the driver it was attached to and then
1873 * clean up the various proc files and other objects attached to it.
1874 *
1875 * Takes ide_setting_sem and ide_lock.
1876 * Caller must hold none of the locks.
1877 */
1878
1879 void ide_unregister_subdriver(ide_drive_t *drive, ide_driver_t *driver)
1880 {
1881 unsigned long flags;
1882
1883 down(&ide_setting_sem);
1884 spin_lock_irqsave(&ide_lock, flags);
1885 #ifdef CONFIG_PROC_FS
1886 ide_remove_proc_entries(drive->proc, driver->proc);
1887 #endif
1888 auto_remove_settings(drive);
1889 spin_unlock_irqrestore(&ide_lock, flags);
1890 up(&ide_setting_sem);
1891 }
1892
1893 EXPORT_SYMBOL(ide_unregister_subdriver);
1894
1895 /*
1896 * Probe module
1897 */
1898
1899 EXPORT_SYMBOL(ide_lock);
1900
1901 static int ide_bus_match(struct device *dev, struct device_driver *drv)
1902 {
1903 return 1;
1904 }
1905
1906 struct bus_type ide_bus_type = {
1907 .name = "ide",
1908 .match = ide_bus_match,
1909 .suspend = generic_ide_suspend,
1910 .resume = generic_ide_resume,
1911 };
1912
1913 EXPORT_SYMBOL_GPL(ide_bus_type);
1914
1915 /*
1916 * This is gets invoked once during initialization, to set *everything* up
1917 */
1918 static int __init ide_init(void)
1919 {
1920 printk(KERN_INFO "Uniform Multi-Platform E-IDE driver " REVISION "\n");
1921 devfs_mk_dir("ide");
1922 system_bus_speed = ide_system_bus_speed();
1923
1924 bus_register(&ide_bus_type);
1925
1926 init_ide_data();
1927
1928 #ifdef CONFIG_PROC_FS
1929 proc_ide_root = proc_mkdir("ide", NULL);
1930 #endif
1931
1932 #ifdef CONFIG_BLK_DEV_ALI14XX
1933 if (probe_ali14xx)
1934 (void)ali14xx_init();
1935 #endif
1936 #ifdef CONFIG_BLK_DEV_UMC8672
1937 if (probe_umc8672)
1938 (void)umc8672_init();
1939 #endif
1940 #ifdef CONFIG_BLK_DEV_DTC2278
1941 if (probe_dtc2278)
1942 (void)dtc2278_init();
1943 #endif
1944 #ifdef CONFIG_BLK_DEV_HT6560B
1945 if (probe_ht6560b)
1946 (void)ht6560b_init();
1947 #endif
1948 #ifdef CONFIG_BLK_DEV_QD65XX
1949 if (probe_qd65xx)
1950 (void)qd65xx_init();
1951 #endif
1952
1953 initializing = 1;
1954 /* Probe for special PCI and other "known" interface chipsets. */
1955 probe_for_hwifs();
1956 initializing = 0;
1957
1958 #ifdef CONFIG_PROC_FS
1959 proc_ide_create();
1960 #endif
1961 return 0;
1962 }
1963
1964 #ifdef MODULE
1965 static char *options = NULL;
1966 module_param(options, charp, 0);
1967 MODULE_LICENSE("GPL");
1968
1969 static void __init parse_options (char *line)
1970 {
1971 char *next = line;
1972
1973 if (line == NULL || !*line)
1974 return;
1975 while ((line = next) != NULL) {
1976 if ((next = strchr(line,' ')) != NULL)
1977 *next++ = 0;
1978 if (!ide_setup(line))
1979 printk (KERN_INFO "Unknown option '%s'\n", line);
1980 }
1981 }
1982
1983 int init_module (void)
1984 {
1985 parse_options(options);
1986 return ide_init();
1987 }
1988
1989 void cleanup_module (void)
1990 {
1991 int index;
1992
1993 for (index = 0; index < MAX_HWIFS; ++index)
1994 ide_unregister(index);
1995
1996 #ifdef CONFIG_PROC_FS
1997 proc_ide_destroy();
1998 #endif
1999 devfs_remove("ide");
2000
2001 bus_unregister(&ide_bus_type);
2002 }
2003
2004 #else /* !MODULE */
2005
2006 __setup("", ide_setup);
2007
2008 module_init(ide_init);
2009
2010 #endif /* MODULE */
Linux kernel - Deliverables
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