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[NetLabel]: tie NetLabel into the Kconfig system
[linux-2.6/openmoko-kernel/knife-kernel.git] / drivers / ide / ide.c
blobdefd4b4bd37488ab38198e8ab86f963c438e2809
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/module.h>
134 #include <linux/types.h>
135 #include <linux/string.h>
136 #include <linux/kernel.h>
137 #include <linux/timer.h>
138 #include <linux/mm.h>
139 #include <linux/interrupt.h>
140 #include <linux/major.h>
141 #include <linux/errno.h>
142 #include <linux/genhd.h>
143 #include <linux/blkpg.h>
144 #include <linux/slab.h>
145 #include <linux/init.h>
146 #include <linux/pci.h>
147 #include <linux/delay.h>
148 #include <linux/ide.h>
149 #include <linux/completion.h>
150 #include <linux/reboot.h>
151 #include <linux/cdrom.h>
152 #include <linux/seq_file.h>
153 #include <linux/device.h>
154 #include <linux/bitops.h>
155
156 #include <asm/byteorder.h>
157 #include <asm/irq.h>
158 #include <asm/uaccess.h>
159 #include <asm/io.h>
160
161
162 /* default maximum number of failures */
163 #define IDE_DEFAULT_MAX_FAILURES 1
164
165 static const u8 ide_hwif_to_major[] = { IDE0_MAJOR, IDE1_MAJOR,
166 IDE2_MAJOR, IDE3_MAJOR,
167 IDE4_MAJOR, IDE5_MAJOR,
168 IDE6_MAJOR, IDE7_MAJOR,
169 IDE8_MAJOR, IDE9_MAJOR };
170
171 static int idebus_parameter; /* holds the "idebus=" parameter */
172 static int system_bus_speed; /* holds what we think is VESA/PCI bus speed */
173 static int initializing; /* set while initializing built-in drivers */
174
175 DECLARE_MUTEX(ide_cfg_sem);
176 __cacheline_aligned_in_smp DEFINE_SPINLOCK(ide_lock);
177
178 #ifdef CONFIG_BLK_DEV_IDEPCI
179 static int ide_scan_direction; /* THIS was formerly 2.2.x pci=reverse */
180 #endif
181
182 #ifdef CONFIG_IDEDMA_AUTO
183 int noautodma = 0;
184 #else
185 int noautodma = 1;
186 #endif
187
188 EXPORT_SYMBOL(noautodma);
189
190 /*
191 * This is declared extern in ide.h, for access by other IDE modules:
192 */
193 ide_hwif_t ide_hwifs[MAX_HWIFS]; /* master data repository */
194
195 EXPORT_SYMBOL(ide_hwifs);
196
197 /*
198 * Do not even *think* about calling this!
199 */
200 static void init_hwif_data(ide_hwif_t *hwif, unsigned int index)
201 {
202 unsigned int unit;
203
204 /* bulk initialize hwif & drive info with zeros */
205 memset(hwif, 0, sizeof(ide_hwif_t));
206
207 /* fill in any non-zero initial values */
208 hwif->index = index;
209 hwif->major = ide_hwif_to_major[index];
210
211 hwif->name[0] = 'i';
212 hwif->name[1] = 'd';
213 hwif->name[2] = 'e';
214 hwif->name[3] = '0' + index;
215
216 hwif->bus_state = BUSSTATE_ON;
217
218 hwif->atapi_dma = 0; /* disable all atapi dma */
219 hwif->ultra_mask = 0x80; /* disable all ultra */
220 hwif->mwdma_mask = 0x80; /* disable all mwdma */
221 hwif->swdma_mask = 0x80; /* disable all swdma */
222
223 init_completion(&hwif->gendev_rel_comp);
224
225 default_hwif_iops(hwif);
226 default_hwif_transport(hwif);
227 for (unit = 0; unit < MAX_DRIVES; ++unit) {
228 ide_drive_t *drive = &hwif->drives[unit];
229
230 drive->media = ide_disk;
231 drive->select.all = (unit<<4)|0xa0;
232 drive->hwif = hwif;
233 drive->ctl = 0x08;
234 drive->ready_stat = READY_STAT;
235 drive->bad_wstat = BAD_W_STAT;
236 drive->special.b.recalibrate = 1;
237 drive->special.b.set_geometry = 1;
238 drive->name[0] = 'h';
239 drive->name[1] = 'd';
240 drive->name[2] = 'a' + (index * MAX_DRIVES) + unit;
241 drive->max_failures = IDE_DEFAULT_MAX_FAILURES;
242 drive->using_dma = 0;
243 drive->vdma = 0;
244 INIT_LIST_HEAD(&drive->list);
245 init_completion(&drive->gendev_rel_comp);
246 }
247 }
248
249 static void init_hwif_default(ide_hwif_t *hwif, unsigned int index)
250 {
251 hw_regs_t hw;
252
253 memset(&hw, 0, sizeof(hw_regs_t));
254
255 ide_init_hwif_ports(&hw, ide_default_io_base(index), 0, &hwif->irq);
256
257 memcpy(&hwif->hw, &hw, sizeof(hw));
258 memcpy(hwif->io_ports, hw.io_ports, sizeof(hw.io_ports));
259
260 hwif->noprobe = !hwif->io_ports[IDE_DATA_OFFSET];
261 #ifdef CONFIG_BLK_DEV_HD
262 if (hwif->io_ports[IDE_DATA_OFFSET] == HD_DATA)
263 hwif->noprobe = 1; /* may be overridden by ide_setup() */
264 #endif
265 }
266
267 extern void ide_arm_init(void);
268
269 /*
270 * init_ide_data() sets reasonable default values into all fields
271 * of all instances of the hwifs and drives, but only on the first call.
272 * Subsequent calls have no effect (they don't wipe out anything).
273 *
274 * This routine is normally called at driver initialization time,
275 * but may also be called MUCH earlier during kernel "command-line"
276 * parameter processing. As such, we cannot depend on any other parts
277 * of the kernel (such as memory allocation) to be functioning yet.
278 *
279 * This is too bad, as otherwise we could dynamically allocate the
280 * ide_drive_t structs as needed, rather than always consuming memory
281 * for the max possible number (MAX_HWIFS * MAX_DRIVES) of them.
282 *
283 * FIXME: We should stuff the setup data into __init and copy the
284 * relevant hwifs/allocate them properly during boot.
285 */
286 #define MAGIC_COOKIE 0x12345678
287 static void __init init_ide_data (void)
288 {
289 ide_hwif_t *hwif;
290 unsigned int index;
291 static unsigned long magic_cookie = MAGIC_COOKIE;
292
293 if (magic_cookie != MAGIC_COOKIE)
294 return; /* already initialized */
295 magic_cookie = 0;
296
297 /* Initialise all interface structures */
298 for (index = 0; index < MAX_HWIFS; ++index) {
299 hwif = &ide_hwifs[index];
300 init_hwif_data(hwif, index);
301 init_hwif_default(hwif, index);
302 #if !defined(CONFIG_PPC32) || !defined(CONFIG_PCI)
303 hwif->irq = hwif->hw.irq =
304 ide_init_default_irq(hwif->io_ports[IDE_DATA_OFFSET]);
305 #endif
306 }
307 #ifdef CONFIG_IDE_ARM
308 initializing = 1;
309 ide_arm_init();
310 initializing = 0;
311 #endif
312 }
313
314 /**
315 * ide_system_bus_speed - guess bus speed
316 *
317 * ide_system_bus_speed() returns what we think is the system VESA/PCI
318 * bus speed (in MHz). This is used for calculating interface PIO timings.
319 * The default is 40 for known PCI systems, 50 otherwise.
320 * The "idebus=xx" parameter can be used to override this value.
321 * The actual value to be used is computed/displayed the first time
322 * through. Drivers should only use this as a last resort.
323 *
324 * Returns a guessed speed in MHz.
325 */
326
327 static int ide_system_bus_speed(void)
328 {
329 #ifdef CONFIG_PCI
330 static struct pci_device_id pci_default[] = {
331 { PCI_DEVICE(PCI_ANY_ID, PCI_ANY_ID) },
332 { }
333 };
334 #else
335 #define pci_default 0
336 #endif /* CONFIG_PCI */
337
338 if (!system_bus_speed) {
339 if (idebus_parameter) {
340 /* user supplied value */
341 system_bus_speed = idebus_parameter;
342 } else if (pci_dev_present(pci_default)) {
343 /* safe default value for PCI */
344 system_bus_speed = 33;
345 } else {
346 /* safe default value for VESA and PCI */
347 system_bus_speed = 50;
348 }
349 printk(KERN_INFO "ide: Assuming %dMHz system bus speed "
350 "for PIO modes%s\n", system_bus_speed,
351 idebus_parameter ? "" : "; override with idebus=xx");
352 }
353 return system_bus_speed;
354 }
355
356 #ifdef CONFIG_PROC_FS
357 struct proc_dir_entry *proc_ide_root;
358 #endif
359
360 static struct resource* hwif_request_region(ide_hwif_t *hwif,
361 unsigned long addr, int num)
362 {
363 struct resource *res = request_region(addr, num, hwif->name);
364
365 if (!res)
366 printk(KERN_ERR "%s: I/O resource 0x%lX-0x%lX not free.\n",
367 hwif->name, addr, addr+num-1);
368 return res;
369 }
370
371 /**
372 * ide_hwif_request_regions - request resources for IDE
373 * @hwif: interface to use
374 *
375 * Requests all the needed resources for an interface.
376 * Right now core IDE code does this work which is deeply wrong.
377 * MMIO leaves it to the controller driver,
378 * PIO will migrate this way over time.
379 */
380
381 int ide_hwif_request_regions(ide_hwif_t *hwif)
382 {
383 unsigned long addr;
384 unsigned int i;
385
386 if (hwif->mmio == 2)
387 return 0;
388 BUG_ON(hwif->mmio == 1);
389 addr = hwif->io_ports[IDE_CONTROL_OFFSET];
390 if (addr && !hwif_request_region(hwif, addr, 1))
391 goto control_region_busy;
392 hwif->straight8 = 0;
393 addr = hwif->io_ports[IDE_DATA_OFFSET];
394 if ((addr | 7) == hwif->io_ports[IDE_STATUS_OFFSET]) {
395 if (!hwif_request_region(hwif, addr, 8))
396 goto data_region_busy;
397 hwif->straight8 = 1;
398 return 0;
399 }
400 for (i = IDE_DATA_OFFSET; i <= IDE_STATUS_OFFSET; i++) {
401 addr = hwif->io_ports[i];
402 if (!hwif_request_region(hwif, addr, 1)) {
403 while (--i)
404 release_region(addr, 1);
405 goto data_region_busy;
406 }
407 }
408 return 0;
409
410 data_region_busy:
411 addr = hwif->io_ports[IDE_CONTROL_OFFSET];
412 if (addr)
413 release_region(addr, 1);
414 control_region_busy:
415 /* If any errors are return, we drop the hwif interface. */
416 return -EBUSY;
417 }
418
419 /**
420 * ide_hwif_release_regions - free IDE resources
421 *
422 * Note that we only release the standard ports,
423 * and do not even try to handle any extra ports
424 * allocated for weird IDE interface chipsets.
425 *
426 * Note also that we don't yet handle mmio resources here. More
427 * importantly our caller should be doing this so we need to
428 * restructure this as a helper function for drivers.
429 */
430
431 void ide_hwif_release_regions(ide_hwif_t *hwif)
432 {
433 u32 i = 0;
434
435 if (hwif->mmio == 2)
436 return;
437 if (hwif->io_ports[IDE_CONTROL_OFFSET])
438 release_region(hwif->io_ports[IDE_CONTROL_OFFSET], 1);
439 if (hwif->straight8) {
440 release_region(hwif->io_ports[IDE_DATA_OFFSET], 8);
441 return;
442 }
443 for (i = IDE_DATA_OFFSET; i <= IDE_STATUS_OFFSET; i++)
444 if (hwif->io_ports[i])
445 release_region(hwif->io_ports[i], 1);
446 }
447
448 /**
449 * ide_hwif_restore - restore hwif to template
450 * @hwif: hwif to update
451 * @tmp_hwif: template
452 *
453 * Restore hwif to a previous state by copying most settngs
454 * from the template.
455 */
456
457 static void ide_hwif_restore(ide_hwif_t *hwif, ide_hwif_t *tmp_hwif)
458 {
459 hwif->hwgroup = tmp_hwif->hwgroup;
460
461 hwif->gendev.parent = tmp_hwif->gendev.parent;
462
463 hwif->proc = tmp_hwif->proc;
464
465 hwif->major = tmp_hwif->major;
466 hwif->straight8 = tmp_hwif->straight8;
467 hwif->bus_state = tmp_hwif->bus_state;
468
469 hwif->atapi_dma = tmp_hwif->atapi_dma;
470 hwif->ultra_mask = tmp_hwif->ultra_mask;
471 hwif->mwdma_mask = tmp_hwif->mwdma_mask;
472 hwif->swdma_mask = tmp_hwif->swdma_mask;
473
474 hwif->chipset = tmp_hwif->chipset;
475 hwif->hold = tmp_hwif->hold;
476
477 #ifdef CONFIG_BLK_DEV_IDEPCI
478 hwif->pci_dev = tmp_hwif->pci_dev;
479 hwif->cds = tmp_hwif->cds;
480 #endif
481
482 hwif->tuneproc = tmp_hwif->tuneproc;
483 hwif->speedproc = tmp_hwif->speedproc;
484 hwif->selectproc = tmp_hwif->selectproc;
485 hwif->reset_poll = tmp_hwif->reset_poll;
486 hwif->pre_reset = tmp_hwif->pre_reset;
487 hwif->resetproc = tmp_hwif->resetproc;
488 hwif->intrproc = tmp_hwif->intrproc;
489 hwif->maskproc = tmp_hwif->maskproc;
490 hwif->quirkproc = tmp_hwif->quirkproc;
491 hwif->busproc = tmp_hwif->busproc;
492
493 hwif->ata_input_data = tmp_hwif->ata_input_data;
494 hwif->ata_output_data = tmp_hwif->ata_output_data;
495 hwif->atapi_input_bytes = tmp_hwif->atapi_input_bytes;
496 hwif->atapi_output_bytes = tmp_hwif->atapi_output_bytes;
497
498 hwif->dma_setup = tmp_hwif->dma_setup;
499 hwif->dma_exec_cmd = tmp_hwif->dma_exec_cmd;
500 hwif->dma_start = tmp_hwif->dma_start;
501 hwif->ide_dma_end = tmp_hwif->ide_dma_end;
502 hwif->ide_dma_check = tmp_hwif->ide_dma_check;
503 hwif->ide_dma_on = tmp_hwif->ide_dma_on;
504 hwif->ide_dma_off_quietly = tmp_hwif->ide_dma_off_quietly;
505 hwif->ide_dma_test_irq = tmp_hwif->ide_dma_test_irq;
506 hwif->ide_dma_host_on = tmp_hwif->ide_dma_host_on;
507 hwif->ide_dma_host_off = tmp_hwif->ide_dma_host_off;
508 hwif->ide_dma_lostirq = tmp_hwif->ide_dma_lostirq;
509 hwif->ide_dma_timeout = tmp_hwif->ide_dma_timeout;
510
511 hwif->OUTB = tmp_hwif->OUTB;
512 hwif->OUTBSYNC = tmp_hwif->OUTBSYNC;
513 hwif->OUTW = tmp_hwif->OUTW;
514 hwif->OUTL = tmp_hwif->OUTL;
515 hwif->OUTSW = tmp_hwif->OUTSW;
516 hwif->OUTSL = tmp_hwif->OUTSL;
517
518 hwif->INB = tmp_hwif->INB;
519 hwif->INW = tmp_hwif->INW;
520 hwif->INL = tmp_hwif->INL;
521 hwif->INSW = tmp_hwif->INSW;
522 hwif->INSL = tmp_hwif->INSL;
523
524 hwif->sg_max_nents = tmp_hwif->sg_max_nents;
525
526 hwif->mmio = tmp_hwif->mmio;
527 hwif->rqsize = tmp_hwif->rqsize;
528 hwif->no_lba48 = tmp_hwif->no_lba48;
529
530 #ifndef CONFIG_BLK_DEV_IDECS
531 hwif->irq = tmp_hwif->irq;
532 #endif
533
534 hwif->dma_base = tmp_hwif->dma_base;
535 hwif->dma_master = tmp_hwif->dma_master;
536 hwif->dma_command = tmp_hwif->dma_command;
537 hwif->dma_vendor1 = tmp_hwif->dma_vendor1;
538 hwif->dma_status = tmp_hwif->dma_status;
539 hwif->dma_vendor3 = tmp_hwif->dma_vendor3;
540 hwif->dma_prdtable = tmp_hwif->dma_prdtable;
541
542 hwif->dma_extra = tmp_hwif->dma_extra;
543 hwif->config_data = tmp_hwif->config_data;
544 hwif->select_data = tmp_hwif->select_data;
545 hwif->autodma = tmp_hwif->autodma;
546 hwif->udma_four = tmp_hwif->udma_four;
547 hwif->no_dsc = tmp_hwif->no_dsc;
548
549 hwif->hwif_data = tmp_hwif->hwif_data;
550 }
551
552 /**
553 * ide_unregister - free an ide interface
554 * @index: index of interface (will change soon to a pointer)
555 *
556 * Perform the final unregister of an IDE interface. At the moment
557 * we don't refcount interfaces so this will also get split up.
558 *
559 * Locking:
560 * The caller must not hold the IDE locks
561 * The drive present/vanishing is not yet properly locked
562 * Take care with the callbacks. These have been split to avoid
563 * deadlocking the IDE layer. The shutdown callback is called
564 * before we take the lock and free resources. It is up to the
565 * caller to be sure there is no pending I/O here, and that
566 * the interfce will not be reopened (present/vanishing locking
567 * isnt yet done btw). After we commit to the final kill we
568 * call the cleanup callback with the ide locks held.
569 *
570 * Unregister restores the hwif structures to the default state.
571 * This is raving bonkers.
572 */
573
574 void ide_unregister(unsigned int index)
575 {
576 ide_drive_t *drive;
577 ide_hwif_t *hwif, *g;
578 static ide_hwif_t tmp_hwif; /* protected by ide_cfg_sem */
579 ide_hwgroup_t *hwgroup;
580 int irq_count = 0, unit;
581
582 BUG_ON(index >= MAX_HWIFS);
583
584 BUG_ON(in_interrupt());
585 BUG_ON(irqs_disabled());
586 down(&ide_cfg_sem);
587 spin_lock_irq(&ide_lock);
588 hwif = &ide_hwifs[index];
589 if (!hwif->present)
590 goto abort;
591 for (unit = 0; unit < MAX_DRIVES; ++unit) {
592 drive = &hwif->drives[unit];
593 if (!drive->present)
594 continue;
595 spin_unlock_irq(&ide_lock);
596 device_unregister(&drive->gendev);
597 wait_for_completion(&drive->gendev_rel_comp);
598 spin_lock_irq(&ide_lock);
599 }
600 hwif->present = 0;
601
602 spin_unlock_irq(&ide_lock);
603
604 destroy_proc_ide_interface(hwif);
605
606 hwgroup = hwif->hwgroup;
607 /*
608 * free the irq if we were the only hwif using it
609 */
610 g = hwgroup->hwif;
611 do {
612 if (g->irq == hwif->irq)
613 ++irq_count;
614 g = g->next;
615 } while (g != hwgroup->hwif);
616 if (irq_count == 1)
617 free_irq(hwif->irq, hwgroup);
618
619 spin_lock_irq(&ide_lock);
620 /*
621 * Note that we only release the standard ports,
622 * and do not even try to handle any extra ports
623 * allocated for weird IDE interface chipsets.
624 */
625 ide_hwif_release_regions(hwif);
626
627 /*
628 * Remove us from the hwgroup, and free
629 * the hwgroup if we were the only member
630 */
631 if (hwif->next == hwif) {
632 BUG_ON(hwgroup->hwif != hwif);
633 kfree(hwgroup);
634 } else {
635 /* There is another interface in hwgroup.
636 * Unlink us, and set hwgroup->drive and ->hwif to
637 * something sane.
638 */
639 g = hwgroup->hwif;
640 while (g->next != hwif)
641 g = g->next;
642 g->next = hwif->next;
643 if (hwgroup->hwif == hwif) {
644 /* Chose a random hwif for hwgroup->hwif.
645 * It's guaranteed that there are no drives
646 * left in the hwgroup.
647 */
648 BUG_ON(hwgroup->drive != NULL);
649 hwgroup->hwif = g;
650 }
651 BUG_ON(hwgroup->hwif == hwif);
652 }
653
654 /* More messed up locking ... */
655 spin_unlock_irq(&ide_lock);
656 device_unregister(&hwif->gendev);
657 wait_for_completion(&hwif->gendev_rel_comp);
658
659 /*
660 * Remove us from the kernel's knowledge
661 */
662 blk_unregister_region(MKDEV(hwif->major, 0), MAX_DRIVES<<PARTN_BITS);
663 kfree(hwif->sg_table);
664 unregister_blkdev(hwif->major, hwif->name);
665 spin_lock_irq(&ide_lock);
666
667 if (hwif->dma_base) {
668 (void) ide_release_dma(hwif);
669
670 hwif->dma_base = 0;
671 hwif->dma_master = 0;
672 hwif->dma_command = 0;
673 hwif->dma_vendor1 = 0;
674 hwif->dma_status = 0;
675 hwif->dma_vendor3 = 0;
676 hwif->dma_prdtable = 0;
677 }
678
679 /* copy original settings */
680 tmp_hwif = *hwif;
681
682 /* restore hwif data to pristine status */
683 init_hwif_data(hwif, index);
684 init_hwif_default(hwif, index);
685
686 ide_hwif_restore(hwif, &tmp_hwif);
687
688 abort:
689 spin_unlock_irq(&ide_lock);
690 up(&ide_cfg_sem);
691 }
692
693 EXPORT_SYMBOL(ide_unregister);
694
695
696 /**
697 * ide_setup_ports - set up IDE interface ports
698 * @hw: register descriptions
699 * @base: base register
700 * @offsets: table of register offsets
701 * @ctrl: control register
702 * @ack_irq: IRQ ack
703 * @irq: interrupt lie
704 *
705 * Setup hw_regs_t structure described by parameters. You
706 * may set up the hw structure yourself OR use this routine to
707 * do it for you. This is basically a helper
708 *
709 */
710
711 void ide_setup_ports ( hw_regs_t *hw,
712 unsigned long base, int *offsets,
713 unsigned long ctrl, unsigned long intr,
714 ide_ack_intr_t *ack_intr,
715 /*
716 * ide_io_ops_t *iops,
717 */
718 int irq)
719 {
720 int i;
721
722 memset(hw, 0, sizeof(hw_regs_t));
723 for (i = 0; i < IDE_NR_PORTS; i++) {
724 if (offsets[i] == -1) {
725 switch(i) {
726 case IDE_CONTROL_OFFSET:
727 hw->io_ports[i] = ctrl;
728 break;
729 #if defined(CONFIG_AMIGA) || defined(CONFIG_MAC)
730 case IDE_IRQ_OFFSET:
731 hw->io_ports[i] = intr;
732 break;
733 #endif /* (CONFIG_AMIGA) || (CONFIG_MAC) */
734 default:
735 hw->io_ports[i] = 0;
736 break;
737 }
738 } else {
739 hw->io_ports[i] = base + offsets[i];
740 }
741 }
742 hw->irq = irq;
743 hw->dma = NO_DMA;
744 hw->ack_intr = ack_intr;
745 /*
746 * hw->iops = iops;
747 */
748 }
749
750 /**
751 * ide_register_hw_with_fixup - register IDE interface
752 * @hw: hardware registers
753 * @hwifp: pointer to returned hwif
754 * @fixup: fixup function
755 *
756 * Register an IDE interface, specifying exactly the registers etc.
757 * Set init=1 iff calling before probes have taken place.
758 *
759 * Returns -1 on error.
760 */
761
762 int ide_register_hw_with_fixup(hw_regs_t *hw, ide_hwif_t **hwifp, void(*fixup)(ide_hwif_t *hwif))
763 {
764 int index, retry = 1;
765 ide_hwif_t *hwif;
766
767 do {
768 for (index = 0; index < MAX_HWIFS; ++index) {
769 hwif = &ide_hwifs[index];
770 if (hwif->hw.io_ports[IDE_DATA_OFFSET] == hw->io_ports[IDE_DATA_OFFSET])
771 goto found;
772 }
773 for (index = 0; index < MAX_HWIFS; ++index) {
774 hwif = &ide_hwifs[index];
775 if (hwif->hold)
776 continue;
777 if ((!hwif->present && !hwif->mate && !initializing) ||
778 (!hwif->hw.io_ports[IDE_DATA_OFFSET] && initializing))
779 goto found;
780 }
781 for (index = 0; index < MAX_HWIFS; index++)
782 ide_unregister(index);
783 } while (retry--);
784 return -1;
785 found:
786 if (hwif->present)
787 ide_unregister(index);
788 else if (!hwif->hold) {
789 init_hwif_data(hwif, index);
790 init_hwif_default(hwif, index);
791 }
792 if (hwif->present)
793 return -1;
794 memcpy(&hwif->hw, hw, sizeof(*hw));
795 memcpy(hwif->io_ports, hwif->hw.io_ports, sizeof(hwif->hw.io_ports));
796 hwif->irq = hw->irq;
797 hwif->noprobe = 0;
798 hwif->chipset = hw->chipset;
799 hwif->gendev.parent = hw->dev;
800
801 if (!initializing) {
802 probe_hwif_init_with_fixup(hwif, fixup);
803 create_proc_ide_interfaces();
804 }
805
806 if (hwifp)
807 *hwifp = hwif;
808
809 return (initializing || hwif->present) ? index : -1;
810 }
811
812 EXPORT_SYMBOL(ide_register_hw_with_fixup);
813
814 int ide_register_hw(hw_regs_t *hw, ide_hwif_t **hwifp)
815 {
816 return ide_register_hw_with_fixup(hw, hwifp, NULL);
817 }
818
819 EXPORT_SYMBOL(ide_register_hw);
820
821 /*
822 * Locks for IDE setting functionality
823 */
824
825 DECLARE_MUTEX(ide_setting_sem);
826
827 /**
828 * __ide_add_setting - add an ide setting option
829 * @drive: drive to use
830 * @name: setting name
831 * @rw: true if the function is read write
832 * @read_ioctl: function to call on read
833 * @write_ioctl: function to call on write
834 * @data_type: type of data
835 * @min: range minimum
836 * @max: range maximum
837 * @mul_factor: multiplication scale
838 * @div_factor: divison scale
839 * @data: private data field
840 * @set: setting
841 * @auto_remove: setting auto removal flag
842 *
843 * Removes the setting named from the device if it is present.
844 * The function takes the settings_lock to protect against
845 * parallel changes. This function must not be called from IRQ
846 * context. Returns 0 on success or -1 on failure.
847 *
848 * BUGS: This code is seriously over-engineered. There is also
849 * magic about how the driver specific features are setup. If
850 * a driver is attached we assume the driver settings are auto
851 * remove.
852 */
853
854 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)
855 {
856 ide_settings_t **p = (ide_settings_t **) &drive->settings, *setting = NULL;
857
858 down(&ide_setting_sem);
859 while ((*p) && strcmp((*p)->name, name) < 0)
860 p = &((*p)->next);
861 if ((setting = kzalloc(sizeof(*setting), GFP_KERNEL)) == NULL)
862 goto abort;
863 if ((setting->name = kmalloc(strlen(name) + 1, GFP_KERNEL)) == NULL)
864 goto abort;
865 strcpy(setting->name, name);
866 setting->rw = rw;
867 setting->read_ioctl = read_ioctl;
868 setting->write_ioctl = write_ioctl;
869 setting->data_type = data_type;
870 setting->min = min;
871 setting->max = max;
872 setting->mul_factor = mul_factor;
873 setting->div_factor = div_factor;
874 setting->data = data;
875 setting->set = set;
876
877 setting->next = *p;
878 if (auto_remove)
879 setting->auto_remove = 1;
880 *p = setting;
881 up(&ide_setting_sem);
882 return 0;
883 abort:
884 up(&ide_setting_sem);
885 kfree(setting);
886 return -1;
887 }
888
889 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)
890 {
891 return __ide_add_setting(drive, name, rw, read_ioctl, write_ioctl, data_type, min, max, mul_factor, div_factor, data, set, 1);
892 }
893
894 EXPORT_SYMBOL(ide_add_setting);
895
896 /**
897 * __ide_remove_setting - remove an ide setting option
898 * @drive: drive to use
899 * @name: setting name
900 *
901 * Removes the setting named from the device if it is present.
902 * The caller must hold the setting semaphore.
903 */
904
905 static void __ide_remove_setting (ide_drive_t *drive, char *name)
906 {
907 ide_settings_t **p, *setting;
908
909 p = (ide_settings_t **) &drive->settings;
910
911 while ((*p) && strcmp((*p)->name, name))
912 p = &((*p)->next);
913 if ((setting = (*p)) == NULL)
914 return;
915
916 (*p) = setting->next;
917
918 kfree(setting->name);
919 kfree(setting);
920 }
921
922 /**
923 * ide_find_setting_by_ioctl - find a drive specific ioctl
924 * @drive: drive to scan
925 * @cmd: ioctl command to handle
926 *
927 * Scan's the device setting table for a matching entry and returns
928 * this or NULL if no entry is found. The caller must hold the
929 * setting semaphore
930 */
931
932 static ide_settings_t *ide_find_setting_by_ioctl (ide_drive_t *drive, int cmd)
933 {
934 ide_settings_t *setting = drive->settings;
935
936 while (setting) {
937 if (setting->read_ioctl == cmd || setting->write_ioctl == cmd)
938 break;
939 setting = setting->next;
940 }
941
942 return setting;
943 }
944
945 /**
946 * ide_find_setting_by_name - find a drive specific setting
947 * @drive: drive to scan
948 * @name: setting name
949 *
950 * Scan's the device setting table for a matching entry and returns
951 * this or NULL if no entry is found. The caller must hold the
952 * setting semaphore
953 */
954
955 ide_settings_t *ide_find_setting_by_name (ide_drive_t *drive, char *name)
956 {
957 ide_settings_t *setting = drive->settings;
958
959 while (setting) {
960 if (strcmp(setting->name, name) == 0)
961 break;
962 setting = setting->next;
963 }
964 return setting;
965 }
966
967 /**
968 * auto_remove_settings - remove driver specific settings
969 * @drive: drive
970 *
971 * Automatically remove all the driver specific settings for this
972 * drive. This function may sleep and must not be called from IRQ
973 * context. The caller must hold ide_setting_sem.
974 */
975
976 static void auto_remove_settings (ide_drive_t *drive)
977 {
978 ide_settings_t *setting;
979 repeat:
980 setting = drive->settings;
981 while (setting) {
982 if (setting->auto_remove) {
983 __ide_remove_setting(drive, setting->name);
984 goto repeat;
985 }
986 setting = setting->next;
987 }
988 }
989
990 /**
991 * ide_read_setting - read an IDE setting
992 * @drive: drive to read from
993 * @setting: drive setting
994 *
995 * Read a drive setting and return the value. The caller
996 * must hold the ide_setting_sem when making this call.
997 *
998 * BUGS: the data return and error are the same return value
999 * so an error -EINVAL and true return of the same value cannot
1000 * be told apart
1001 */
1002
1003 int ide_read_setting (ide_drive_t *drive, ide_settings_t *setting)
1004 {
1005 int val = -EINVAL;
1006 unsigned long flags;
1007
1008 if ((setting->rw & SETTING_READ)) {
1009 spin_lock_irqsave(&ide_lock, flags);
1010 switch(setting->data_type) {
1011 case TYPE_BYTE:
1012 val = *((u8 *) setting->data);
1013 break;
1014 case TYPE_SHORT:
1015 val = *((u16 *) setting->data);
1016 break;
1017 case TYPE_INT:
1018 case TYPE_INTA:
1019 val = *((u32 *) setting->data);
1020 break;
1021 }
1022 spin_unlock_irqrestore(&ide_lock, flags);
1023 }
1024 return val;
1025 }
1026
1027 /**
1028 * ide_spin_wait_hwgroup - wait for group
1029 * @drive: drive in the group
1030 *
1031 * Wait for an IDE device group to go non busy and then return
1032 * holding the ide_lock which guards the hwgroup->busy status
1033 * and right to use it.
1034 */
1035
1036 int ide_spin_wait_hwgroup (ide_drive_t *drive)
1037 {
1038 ide_hwgroup_t *hwgroup = HWGROUP(drive);
1039 unsigned long timeout = jiffies + (3 * HZ);
1040
1041 spin_lock_irq(&ide_lock);
1042
1043 while (hwgroup->busy) {
1044 unsigned long lflags;
1045 spin_unlock_irq(&ide_lock);
1046 local_irq_set(lflags);
1047 if (time_after(jiffies, timeout)) {
1048 local_irq_restore(lflags);
1049 printk(KERN_ERR "%s: channel busy\n", drive->name);
1050 return -EBUSY;
1051 }
1052 local_irq_restore(lflags);
1053 spin_lock_irq(&ide_lock);
1054 }
1055 return 0;
1056 }
1057
1058 EXPORT_SYMBOL(ide_spin_wait_hwgroup);
1059
1060 /**
1061 * ide_write_setting - read an IDE setting
1062 * @drive: drive to read from
1063 * @setting: drive setting
1064 * @val: value
1065 *
1066 * Write a drive setting if it is possible. The caller
1067 * must hold the ide_setting_sem when making this call.
1068 *
1069 * BUGS: the data return and error are the same return value
1070 * so an error -EINVAL and true return of the same value cannot
1071 * be told apart
1072 *
1073 * FIXME: This should be changed to enqueue a special request
1074 * to the driver to change settings, and then wait on a sema for completion.
1075 * The current scheme of polling is kludgy, though safe enough.
1076 */
1077
1078 int ide_write_setting (ide_drive_t *drive, ide_settings_t *setting, int val)
1079 {
1080 int i;
1081 u32 *p;
1082
1083 if (!capable(CAP_SYS_ADMIN))
1084 return -EACCES;
1085 if (!(setting->rw & SETTING_WRITE))
1086 return -EPERM;
1087 if (val < setting->min || val > setting->max)
1088 return -EINVAL;
1089 if (setting->set)
1090 return setting->set(drive, val);
1091 if (ide_spin_wait_hwgroup(drive))
1092 return -EBUSY;
1093 switch (setting->data_type) {
1094 case TYPE_BYTE:
1095 *((u8 *) setting->data) = val;
1096 break;
1097 case TYPE_SHORT:
1098 *((u16 *) setting->data) = val;
1099 break;
1100 case TYPE_INT:
1101 *((u32 *) setting->data) = val;
1102 break;
1103 case TYPE_INTA:
1104 p = (u32 *) setting->data;
1105 for (i = 0; i < 1 << PARTN_BITS; i++, p++)
1106 *p = val;
1107 break;
1108 }
1109 spin_unlock_irq(&ide_lock);
1110 return 0;
1111 }
1112
1113 static int set_io_32bit(ide_drive_t *drive, int arg)
1114 {
1115 drive->io_32bit = arg;
1116 #ifdef CONFIG_BLK_DEV_DTC2278
1117 if (HWIF(drive)->chipset == ide_dtc2278)
1118 HWIF(drive)->drives[!drive->select.b.unit].io_32bit = arg;
1119 #endif /* CONFIG_BLK_DEV_DTC2278 */
1120 return 0;
1121 }
1122
1123 static int set_using_dma (ide_drive_t *drive, int arg)
1124 {
1125 #ifdef CONFIG_BLK_DEV_IDEDMA
1126 if (!drive->id || !(drive->id->capability & 1))
1127 return -EPERM;
1128 if (HWIF(drive)->ide_dma_check == NULL)
1129 return -EPERM;
1130 if (arg) {
1131 if (HWIF(drive)->ide_dma_check(drive)) return -EIO;
1132 if (HWIF(drive)->ide_dma_on(drive)) return -EIO;
1133 } else {
1134 if (__ide_dma_off(drive))
1135 return -EIO;
1136 }
1137 return 0;
1138 #else
1139 return -EPERM;
1140 #endif
1141 }
1142
1143 static int set_pio_mode (ide_drive_t *drive, int arg)
1144 {
1145 struct request rq;
1146
1147 if (!HWIF(drive)->tuneproc)
1148 return -ENOSYS;
1149 if (drive->special.b.set_tune)
1150 return -EBUSY;
1151 ide_init_drive_cmd(&rq);
1152 drive->tune_req = (u8) arg;
1153 drive->special.b.set_tune = 1;
1154 (void) ide_do_drive_cmd(drive, &rq, ide_wait);
1155 return 0;
1156 }
1157
1158 static int set_xfer_rate (ide_drive_t *drive, int arg)
1159 {
1160 int err = ide_wait_cmd(drive,
1161 WIN_SETFEATURES, (u8) arg,
1162 SETFEATURES_XFER, 0, NULL);
1163
1164 if (!err && arg) {
1165 ide_set_xfer_rate(drive, (u8) arg);
1166 ide_driveid_update(drive);
1167 }
1168 return err;
1169 }
1170
1171 /**
1172 * ide_add_generic_settings - generic ide settings
1173 * @drive: drive being configured
1174 *
1175 * Add the generic parts of the system settings to the /proc files and
1176 * ioctls for this IDE device. The caller must not be holding the
1177 * ide_setting_sem.
1178 */
1179
1180 void ide_add_generic_settings (ide_drive_t *drive)
1181 {
1182 /*
1183 * drive setting name read/write access read ioctl write ioctl data type min max mul_factor div_factor data pointer set function
1184 */
1185 __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);
1186 __ide_add_setting(drive, "keepsettings", SETTING_RW, HDIO_GET_KEEPSETTINGS, HDIO_SET_KEEPSETTINGS, TYPE_BYTE, 0, 1, 1, 1, &drive->keep_settings, NULL, 0);
1187 __ide_add_setting(drive, "nice1", SETTING_RW, -1, -1, TYPE_BYTE, 0, 1, 1, 1, &drive->nice1, NULL, 0);
1188 __ide_add_setting(drive, "pio_mode", SETTING_WRITE, -1, HDIO_SET_PIO_MODE, TYPE_BYTE, 0, 255, 1, 1, NULL, set_pio_mode, 0);
1189 __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);
1190 __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);
1191 __ide_add_setting(drive, "init_speed", SETTING_RW, -1, -1, TYPE_BYTE, 0, 70, 1, 1, &drive->init_speed, NULL, 0);
1192 __ide_add_setting(drive, "current_speed", SETTING_RW, -1, -1, TYPE_BYTE, 0, 70, 1, 1, &drive->current_speed, set_xfer_rate, 0);
1193 __ide_add_setting(drive, "number", SETTING_RW, -1, -1, TYPE_BYTE, 0, 3, 1, 1, &drive->dn, NULL, 0);
1194 }
1195
1196 /**
1197 * system_bus_clock - clock guess
1198 *
1199 * External version of the bus clock guess used by very old IDE drivers
1200 * for things like VLB timings. Should not be used.
1201 */
1202
1203 int system_bus_clock (void)
1204 {
1205 return((int) ((!system_bus_speed) ? ide_system_bus_speed() : system_bus_speed ));
1206 }
1207
1208 EXPORT_SYMBOL(system_bus_clock);
1209
1210 static int generic_ide_suspend(struct device *dev, pm_message_t state)
1211 {
1212 ide_drive_t *drive = dev->driver_data;
1213 struct request rq;
1214 struct request_pm_state rqpm;
1215 ide_task_t args;
1216
1217 memset(&rq, 0, sizeof(rq));
1218 memset(&rqpm, 0, sizeof(rqpm));
1219 memset(&args, 0, sizeof(args));
1220 rq.flags = REQ_PM_SUSPEND;
1221 rq.special = &args;
1222 rq.end_io_data = &rqpm;
1223 rqpm.pm_step = ide_pm_state_start_suspend;
1224 rqpm.pm_state = state.event;
1225
1226 return ide_do_drive_cmd(drive, &rq, ide_wait);
1227 }
1228
1229 static int generic_ide_resume(struct device *dev)
1230 {
1231 ide_drive_t *drive = dev->driver_data;
1232 struct request rq;
1233 struct request_pm_state rqpm;
1234 ide_task_t args;
1235
1236 memset(&rq, 0, sizeof(rq));
1237 memset(&rqpm, 0, sizeof(rqpm));
1238 memset(&args, 0, sizeof(args));
1239 rq.flags = REQ_PM_RESUME;
1240 rq.special = &args;
1241 rq.end_io_data = &rqpm;
1242 rqpm.pm_step = ide_pm_state_start_resume;
1243 rqpm.pm_state = PM_EVENT_ON;
1244
1245 return ide_do_drive_cmd(drive, &rq, ide_head_wait);
1246 }
1247
1248 int generic_ide_ioctl(ide_drive_t *drive, struct file *file, struct block_device *bdev,
1249 unsigned int cmd, unsigned long arg)
1250 {
1251 ide_settings_t *setting;
1252 ide_driver_t *drv;
1253 int err = 0;
1254 void __user *p = (void __user *)arg;
1255
1256 down(&ide_setting_sem);
1257 if ((setting = ide_find_setting_by_ioctl(drive, cmd)) != NULL) {
1258 if (cmd == setting->read_ioctl) {
1259 err = ide_read_setting(drive, setting);
1260 up(&ide_setting_sem);
1261 return err >= 0 ? put_user(err, (long __user *)arg) : err;
1262 } else {
1263 if (bdev != bdev->bd_contains)
1264 err = -EINVAL;
1265 else
1266 err = ide_write_setting(drive, setting, arg);
1267 up(&ide_setting_sem);
1268 return err;
1269 }
1270 }
1271 up(&ide_setting_sem);
1272
1273 switch (cmd) {
1274 case HDIO_OBSOLETE_IDENTITY:
1275 case HDIO_GET_IDENTITY:
1276 if (bdev != bdev->bd_contains)
1277 return -EINVAL;
1278 if (drive->id_read == 0)
1279 return -ENOMSG;
1280 if (copy_to_user(p, drive->id, (cmd == HDIO_GET_IDENTITY) ? sizeof(*drive->id) : 142))
1281 return -EFAULT;
1282 return 0;
1283
1284 case HDIO_GET_NICE:
1285 return put_user(drive->dsc_overlap << IDE_NICE_DSC_OVERLAP |
1286 drive->atapi_overlap << IDE_NICE_ATAPI_OVERLAP |
1287 drive->nice0 << IDE_NICE_0 |
1288 drive->nice1 << IDE_NICE_1 |
1289 drive->nice2 << IDE_NICE_2,
1290 (long __user *) arg);
1291
1292 #ifdef CONFIG_IDE_TASK_IOCTL
1293 case HDIO_DRIVE_TASKFILE:
1294 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
1295 return -EACCES;
1296 switch(drive->media) {
1297 case ide_disk:
1298 return ide_taskfile_ioctl(drive, cmd, arg);
1299 default:
1300 return -ENOMSG;
1301 }
1302 #endif /* CONFIG_IDE_TASK_IOCTL */
1303
1304 case HDIO_DRIVE_CMD:
1305 if (!capable(CAP_SYS_RAWIO))
1306 return -EACCES;
1307 return ide_cmd_ioctl(drive, cmd, arg);
1308
1309 case HDIO_DRIVE_TASK:
1310 if (!capable(CAP_SYS_RAWIO))
1311 return -EACCES;
1312 return ide_task_ioctl(drive, cmd, arg);
1313
1314 case HDIO_SCAN_HWIF:
1315 {
1316 hw_regs_t hw;
1317 int args[3];
1318 if (!capable(CAP_SYS_RAWIO)) return -EACCES;
1319 if (copy_from_user(args, p, 3 * sizeof(int)))
1320 return -EFAULT;
1321 memset(&hw, 0, sizeof(hw));
1322 ide_init_hwif_ports(&hw, (unsigned long) args[0],
1323 (unsigned long) args[1], NULL);
1324 hw.irq = args[2];
1325 if (ide_register_hw(&hw, NULL) == -1)
1326 return -EIO;
1327 return 0;
1328 }
1329 case HDIO_UNREGISTER_HWIF:
1330 if (!capable(CAP_SYS_RAWIO)) return -EACCES;
1331 /* (arg > MAX_HWIFS) checked in function */
1332 ide_unregister(arg);
1333 return 0;
1334 case HDIO_SET_NICE:
1335 if (!capable(CAP_SYS_ADMIN)) return -EACCES;
1336 if (arg != (arg & ((1 << IDE_NICE_DSC_OVERLAP) | (1 << IDE_NICE_1))))
1337 return -EPERM;
1338 drive->dsc_overlap = (arg >> IDE_NICE_DSC_OVERLAP) & 1;
1339 drv = *(ide_driver_t **)bdev->bd_disk->private_data;
1340 if (drive->dsc_overlap && !drv->supports_dsc_overlap) {
1341 drive->dsc_overlap = 0;
1342 return -EPERM;
1343 }
1344 drive->nice1 = (arg >> IDE_NICE_1) & 1;
1345 return 0;
1346 case HDIO_DRIVE_RESET:
1347 {
1348 unsigned long flags;
1349 if (!capable(CAP_SYS_ADMIN)) return -EACCES;
1350
1351 /*
1352 * Abort the current command on the
1353 * group if there is one, taking
1354 * care not to allow anything else
1355 * to be queued and to die on the
1356 * spot if we miss one somehow
1357 */
1358
1359 spin_lock_irqsave(&ide_lock, flags);
1360
1361 ide_abort(drive, "drive reset");
1362
1363 BUG_ON(HWGROUP(drive)->handler);
1364
1365 /* Ensure nothing gets queued after we
1366 drop the lock. Reset will clear the busy */
1367
1368 HWGROUP(drive)->busy = 1;
1369 spin_unlock_irqrestore(&ide_lock, flags);
1370 (void) ide_do_reset(drive);
1371
1372 return 0;
1373 }
1374
1375 case CDROMEJECT:
1376 case CDROMCLOSETRAY:
1377 return scsi_cmd_ioctl(file, bdev->bd_disk, cmd, p);
1378
1379 case HDIO_GET_BUSSTATE:
1380 if (!capable(CAP_SYS_ADMIN))
1381 return -EACCES;
1382 if (put_user(HWIF(drive)->bus_state, (long __user *)arg))
1383 return -EFAULT;
1384 return 0;
1385
1386 case HDIO_SET_BUSSTATE:
1387 if (!capable(CAP_SYS_ADMIN))
1388 return -EACCES;
1389 if (HWIF(drive)->busproc)
1390 return HWIF(drive)->busproc(drive, (int)arg);
1391 return -EOPNOTSUPP;
1392 default:
1393 return -EINVAL;
1394 }
1395 }
1396
1397 EXPORT_SYMBOL(generic_ide_ioctl);
1398
1399 /*
1400 * stridx() returns the offset of c within s,
1401 * or -1 if c is '\0' or not found within s.
1402 */
1403 static int __init stridx (const char *s, char c)
1404 {
1405 char *i = strchr(s, c);
1406 return (i && c) ? i - s : -1;
1407 }
1408
1409 /*
1410 * match_parm() does parsing for ide_setup():
1411 *
1412 * 1. the first char of s must be '='.
1413 * 2. if the remainder matches one of the supplied keywords,
1414 * the index (1 based) of the keyword is negated and returned.
1415 * 3. if the remainder is a series of no more than max_vals numbers
1416 * separated by commas, the numbers are saved in vals[] and a
1417 * count of how many were saved is returned. Base10 is assumed,
1418 * and base16 is allowed when prefixed with "0x".
1419 * 4. otherwise, zero is returned.
1420 */
1421 static int __init match_parm (char *s, const char *keywords[], int vals[], int max_vals)
1422 {
1423 static const char *decimal = "0123456789";
1424 static const char *hex = "0123456789abcdef";
1425 int i, n;
1426
1427 if (*s++ == '=') {
1428 /*
1429 * Try matching against the supplied keywords,
1430 * and return -(index+1) if we match one
1431 */
1432 if (keywords != NULL) {
1433 for (i = 0; *keywords != NULL; ++i) {
1434 if (!strcmp(s, *keywords++))
1435 return -(i+1);
1436 }
1437 }
1438 /*
1439 * Look for a series of no more than "max_vals"
1440 * numeric values separated by commas, in base10,
1441 * or base16 when prefixed with "0x".
1442 * Return a count of how many were found.
1443 */
1444 for (n = 0; (i = stridx(decimal, *s)) >= 0;) {
1445 vals[n] = i;
1446 while ((i = stridx(decimal, *++s)) >= 0)
1447 vals[n] = (vals[n] * 10) + i;
1448 if (*s == 'x' && !vals[n]) {
1449 while ((i = stridx(hex, *++s)) >= 0)
1450 vals[n] = (vals[n] * 0x10) + i;
1451 }
1452 if (++n == max_vals)
1453 break;
1454 if (*s == ',' || *s == ';')
1455 ++s;
1456 }
1457 if (!*s)
1458 return n;
1459 }
1460 return 0; /* zero = nothing matched */
1461 }
1462
1463 #ifdef CONFIG_BLK_DEV_ALI14XX
1464 static int __initdata probe_ali14xx;
1465 extern int ali14xx_init(void);
1466 #endif
1467 #ifdef CONFIG_BLK_DEV_UMC8672
1468 static int __initdata probe_umc8672;
1469 extern int umc8672_init(void);
1470 #endif
1471 #ifdef CONFIG_BLK_DEV_DTC2278
1472 static int __initdata probe_dtc2278;
1473 extern int dtc2278_init(void);
1474 #endif
1475 #ifdef CONFIG_BLK_DEV_HT6560B
1476 static int __initdata probe_ht6560b;
1477 extern int ht6560b_init(void);
1478 #endif
1479 #ifdef CONFIG_BLK_DEV_QD65XX
1480 static int __initdata probe_qd65xx;
1481 extern int qd65xx_init(void);
1482 #endif
1483
1484 static int __initdata is_chipset_set[MAX_HWIFS];
1485
1486 /*
1487 * ide_setup() gets called VERY EARLY during initialization,
1488 * to handle kernel "command line" strings beginning with "hdx=" or "ide".
1489 *
1490 * Remember to update Documentation/ide.txt if you change something here.
1491 */
1492 static int __init ide_setup(char *s)
1493 {
1494 int i, vals[3];
1495 ide_hwif_t *hwif;
1496 ide_drive_t *drive;
1497 unsigned int hw, unit;
1498 const char max_drive = 'a' + ((MAX_HWIFS * MAX_DRIVES) - 1);
1499 const char max_hwif = '0' + (MAX_HWIFS - 1);
1500
1501
1502 if (strncmp(s,"hd",2) == 0 && s[2] == '=') /* hd= is for hd.c */
1503 return 0; /* driver and not us */
1504
1505 if (strncmp(s,"ide",3) && strncmp(s,"idebus",6) && strncmp(s,"hd",2))
1506 return 0;
1507
1508 printk(KERN_INFO "ide_setup: %s", s);
1509 init_ide_data ();
1510
1511 #ifdef CONFIG_BLK_DEV_IDEDOUBLER
1512 if (!strcmp(s, "ide=doubler")) {
1513 extern int ide_doubler;
1514
1515 printk(" : Enabled support for IDE doublers\n");
1516 ide_doubler = 1;
1517 return 1;
1518 }
1519 #endif /* CONFIG_BLK_DEV_IDEDOUBLER */
1520
1521 if (!strcmp(s, "ide=nodma")) {
1522 printk(" : Prevented DMA\n");
1523 noautodma = 1;
1524 return 1;
1525 }
1526
1527 #ifdef CONFIG_BLK_DEV_IDEPCI
1528 if (!strcmp(s, "ide=reverse")) {
1529 ide_scan_direction = 1;
1530 printk(" : Enabled support for IDE inverse scan order.\n");
1531 return 1;
1532 }
1533 #endif /* CONFIG_BLK_DEV_IDEPCI */
1534
1535 /*
1536 * Look for drive options: "hdx="
1537 */
1538 if (s[0] == 'h' && s[1] == 'd' && s[2] >= 'a' && s[2] <= max_drive) {
1539 const char *hd_words[] = {
1540 "none", "noprobe", "nowerr", "cdrom", "serialize",
1541 "autotune", "noautotune", "minus8", "swapdata", "bswap",
1542 "noflush", "remap", "remap63", "scsi", NULL };
1543 unit = s[2] - 'a';
1544 hw = unit / MAX_DRIVES;
1545 unit = unit % MAX_DRIVES;
1546 hwif = &ide_hwifs[hw];
1547 drive = &hwif->drives[unit];
1548 if (strncmp(s + 4, "ide-", 4) == 0) {
1549 strlcpy(drive->driver_req, s + 4, sizeof(drive->driver_req));
1550 goto done;
1551 }
1552 switch (match_parm(&s[3], hd_words, vals, 3)) {
1553 case -1: /* "none" */
1554 case -2: /* "noprobe" */
1555 drive->noprobe = 1;
1556 goto done;
1557 case -3: /* "nowerr" */
1558 drive->bad_wstat = BAD_R_STAT;
1559 hwif->noprobe = 0;
1560 goto done;
1561 case -4: /* "cdrom" */
1562 drive->present = 1;
1563 drive->media = ide_cdrom;
1564 /* an ATAPI device ignores DRDY */
1565 drive->ready_stat = 0;
1566 hwif->noprobe = 0;
1567 goto done;
1568 case -5: /* "serialize" */
1569 printk(" -- USE \"ide%d=serialize\" INSTEAD", hw);
1570 goto do_serialize;
1571 case -6: /* "autotune" */
1572 drive->autotune = IDE_TUNE_AUTO;
1573 goto obsolete_option;
1574 case -7: /* "noautotune" */
1575 drive->autotune = IDE_TUNE_NOAUTO;
1576 goto obsolete_option;
1577 case -9: /* "swapdata" */
1578 case -10: /* "bswap" */
1579 drive->bswap = 1;
1580 goto done;
1581 case -11: /* noflush */
1582 drive->noflush = 1;
1583 goto done;
1584 case -12: /* "remap" */
1585 drive->remap_0_to_1 = 1;
1586 goto done;
1587 case -13: /* "remap63" */
1588 drive->sect0 = 63;
1589 goto done;
1590 case -14: /* "scsi" */
1591 drive->scsi = 1;
1592 goto done;
1593 case 3: /* cyl,head,sect */
1594 drive->media = ide_disk;
1595 drive->ready_stat = READY_STAT;
1596 drive->cyl = drive->bios_cyl = vals[0];
1597 drive->head = drive->bios_head = vals[1];
1598 drive->sect = drive->bios_sect = vals[2];
1599 drive->present = 1;
1600 drive->forced_geom = 1;
1601 hwif->noprobe = 0;
1602 goto done;
1603 default:
1604 goto bad_option;
1605 }
1606 }
1607
1608 if (s[0] != 'i' || s[1] != 'd' || s[2] != 'e')
1609 goto bad_option;
1610 /*
1611 * Look for bus speed option: "idebus="
1612 */
1613 if (s[3] == 'b' && s[4] == 'u' && s[5] == 's') {
1614 if (match_parm(&s[6], NULL, vals, 1) != 1)
1615 goto bad_option;
1616 if (vals[0] >= 20 && vals[0] <= 66) {
1617 idebus_parameter = vals[0];
1618 } else
1619 printk(" -- BAD BUS SPEED! Expected value from 20 to 66");
1620 goto done;
1621 }
1622 /*
1623 * Look for interface options: "idex="
1624 */
1625 if (s[3] >= '0' && s[3] <= max_hwif) {
1626 /*
1627 * Be VERY CAREFUL changing this: note hardcoded indexes below
1628 * (-8, -9, -10) are reserved to ease the hardcoding.
1629 */
1630 static const char *ide_words[] = {
1631 "noprobe", "serialize", "autotune", "noautotune",
1632 "reset", "dma", "ata66", "minus8", "minus9",
1633 "minus10", "four", "qd65xx", "ht6560b", "cmd640_vlb",
1634 "dtc2278", "umc8672", "ali14xx", NULL };
1635 hw = s[3] - '0';
1636 hwif = &ide_hwifs[hw];
1637 i = match_parm(&s[4], ide_words, vals, 3);
1638
1639 /*
1640 * Cryptic check to ensure chipset not already set for hwif.
1641 * Note: we can't depend on hwif->chipset here.
1642 */
1643 if ((i >= -18 && i <= -11) || (i > 0 && i <= 3)) {
1644 /* chipset already specified */
1645 if (is_chipset_set[hw])
1646 goto bad_option;
1647 if (i > -18 && i <= -11) {
1648 /* these drivers are for "ide0=" only */
1649 if (hw != 0)
1650 goto bad_hwif;
1651 /* chipset already specified for 2nd port */
1652 if (is_chipset_set[hw+1])
1653 goto bad_option;
1654 }
1655 is_chipset_set[hw] = 1;
1656 printk("\n");
1657 }
1658
1659 switch (i) {
1660 #ifdef CONFIG_BLK_DEV_ALI14XX
1661 case -17: /* "ali14xx" */
1662 probe_ali14xx = 1;
1663 goto done;
1664 #endif
1665 #ifdef CONFIG_BLK_DEV_UMC8672
1666 case -16: /* "umc8672" */
1667 probe_umc8672 = 1;
1668 goto done;
1669 #endif
1670 #ifdef CONFIG_BLK_DEV_DTC2278
1671 case -15: /* "dtc2278" */
1672 probe_dtc2278 = 1;
1673 goto done;
1674 #endif
1675 #ifdef CONFIG_BLK_DEV_CMD640
1676 case -14: /* "cmd640_vlb" */
1677 {
1678 extern int cmd640_vlb; /* flag for cmd640.c */
1679 cmd640_vlb = 1;
1680 goto done;
1681 }
1682 #endif
1683 #ifdef CONFIG_BLK_DEV_HT6560B
1684 case -13: /* "ht6560b" */
1685 probe_ht6560b = 1;
1686 goto done;
1687 #endif
1688 #ifdef CONFIG_BLK_DEV_QD65XX
1689 case -12: /* "qd65xx" */
1690 probe_qd65xx = 1;
1691 goto done;
1692 #endif
1693 #ifdef CONFIG_BLK_DEV_4DRIVES
1694 case -11: /* "four" drives on one set of ports */
1695 {
1696 ide_hwif_t *mate = &ide_hwifs[hw^1];
1697 mate->drives[0].select.all ^= 0x20;
1698 mate->drives[1].select.all ^= 0x20;
1699 hwif->chipset = mate->chipset = ide_4drives;
1700 mate->irq = hwif->irq;
1701 memcpy(mate->io_ports, hwif->io_ports, sizeof(hwif->io_ports));
1702 goto do_serialize;
1703 }
1704 #endif /* CONFIG_BLK_DEV_4DRIVES */
1705 case -10: /* minus10 */
1706 case -9: /* minus9 */
1707 case -8: /* minus8 */
1708 goto bad_option;
1709 case -7: /* ata66 */
1710 #ifdef CONFIG_BLK_DEV_IDEPCI
1711 hwif->udma_four = 1;
1712 goto obsolete_option;
1713 #else
1714 goto bad_hwif;
1715 #endif
1716 case -6: /* dma */
1717 hwif->autodma = 1;
1718 goto obsolete_option;
1719 case -5: /* "reset" */
1720 hwif->reset = 1;
1721 goto obsolete_option;
1722 case -4: /* "noautotune" */
1723 hwif->drives[0].autotune = IDE_TUNE_NOAUTO;
1724 hwif->drives[1].autotune = IDE_TUNE_NOAUTO;
1725 goto obsolete_option;
1726 case -3: /* "autotune" */
1727 hwif->drives[0].autotune = IDE_TUNE_AUTO;
1728 hwif->drives[1].autotune = IDE_TUNE_AUTO;
1729 goto obsolete_option;
1730 case -2: /* "serialize" */
1731 do_serialize:
1732 hwif->mate = &ide_hwifs[hw^1];
1733 hwif->mate->mate = hwif;
1734 hwif->serialized = hwif->mate->serialized = 1;
1735 goto obsolete_option;
1736
1737 case -1: /* "noprobe" */
1738 hwif->noprobe = 1;
1739 goto done;
1740
1741 case 1: /* base */
1742 vals[1] = vals[0] + 0x206; /* default ctl */
1743 case 2: /* base,ctl */
1744 vals[2] = 0; /* default irq = probe for it */
1745 case 3: /* base,ctl,irq */
1746 hwif->hw.irq = vals[2];
1747 ide_init_hwif_ports(&hwif->hw, (unsigned long) vals[0], (unsigned long) vals[1], &hwif->irq);
1748 memcpy(hwif->io_ports, hwif->hw.io_ports, sizeof(hwif->io_ports));
1749 hwif->irq = vals[2];
1750 hwif->noprobe = 0;
1751 hwif->chipset = ide_forced;
1752 goto obsolete_option;
1753
1754 case 0: goto bad_option;
1755 default:
1756 printk(" -- SUPPORT NOT CONFIGURED IN THIS KERNEL\n");
1757 return 1;
1758 }
1759 }
1760 bad_option:
1761 printk(" -- BAD OPTION\n");
1762 return 1;
1763 obsolete_option:
1764 printk(" -- OBSOLETE OPTION, WILL BE REMOVED SOON!\n");
1765 return 1;
1766 bad_hwif:
1767 printk("-- NOT SUPPORTED ON ide%d", hw);
1768 done:
1769 printk("\n");
1770 return 1;
1771 }
1772
1773 extern void pnpide_init(void);
1774 extern void h8300_ide_init(void);
1775
1776 /*
1777 * probe_for_hwifs() finds/initializes "known" IDE interfaces
1778 */
1779 static void __init probe_for_hwifs (void)
1780 {
1781 #ifdef CONFIG_BLK_DEV_IDEPCI
1782 ide_scan_pcibus(ide_scan_direction);
1783 #endif /* CONFIG_BLK_DEV_IDEPCI */
1784
1785 #ifdef CONFIG_ETRAX_IDE
1786 {
1787 extern void init_e100_ide(void);
1788 init_e100_ide();
1789 }
1790 #endif /* CONFIG_ETRAX_IDE */
1791 #ifdef CONFIG_BLK_DEV_CMD640
1792 {
1793 extern void ide_probe_for_cmd640x(void);
1794 ide_probe_for_cmd640x();
1795 }
1796 #endif /* CONFIG_BLK_DEV_CMD640 */
1797 #ifdef CONFIG_BLK_DEV_IDE_PMAC
1798 {
1799 extern void pmac_ide_probe(void);
1800 pmac_ide_probe();
1801 }
1802 #endif /* CONFIG_BLK_DEV_IDE_PMAC */
1803 #ifdef CONFIG_BLK_DEV_GAYLE
1804 {
1805 extern void gayle_init(void);
1806 gayle_init();
1807 }
1808 #endif /* CONFIG_BLK_DEV_GAYLE */
1809 #ifdef CONFIG_BLK_DEV_FALCON_IDE
1810 {
1811 extern void falconide_init(void);
1812 falconide_init();
1813 }
1814 #endif /* CONFIG_BLK_DEV_FALCON_IDE */
1815 #ifdef CONFIG_BLK_DEV_MAC_IDE
1816 {
1817 extern void macide_init(void);
1818 macide_init();
1819 }
1820 #endif /* CONFIG_BLK_DEV_MAC_IDE */
1821 #ifdef CONFIG_BLK_DEV_Q40IDE
1822 {
1823 extern void q40ide_init(void);
1824 q40ide_init();
1825 }
1826 #endif /* CONFIG_BLK_DEV_Q40IDE */
1827 #ifdef CONFIG_BLK_DEV_BUDDHA
1828 {
1829 extern void buddha_init(void);
1830 buddha_init();
1831 }
1832 #endif /* CONFIG_BLK_DEV_BUDDHA */
1833 #ifdef CONFIG_BLK_DEV_IDEPNP
1834 pnpide_init();
1835 #endif
1836 #ifdef CONFIG_H8300
1837 h8300_ide_init();
1838 #endif
1839 }
1840
1841 void ide_register_subdriver(ide_drive_t *drive, ide_driver_t *driver)
1842 {
1843 #ifdef CONFIG_PROC_FS
1844 ide_add_proc_entries(drive->proc, driver->proc, drive);
1845 #endif
1846 }
1847
1848 EXPORT_SYMBOL(ide_register_subdriver);
1849
1850 /**
1851 * ide_unregister_subdriver - disconnect drive from driver
1852 * @drive: drive to unplug
1853 * @driver: driver
1854 *
1855 * Disconnect a drive from the driver it was attached to and then
1856 * clean up the various proc files and other objects attached to it.
1857 *
1858 * Takes ide_setting_sem and ide_lock.
1859 * Caller must hold none of the locks.
1860 */
1861
1862 void ide_unregister_subdriver(ide_drive_t *drive, ide_driver_t *driver)
1863 {
1864 unsigned long flags;
1865
1866 down(&ide_setting_sem);
1867 spin_lock_irqsave(&ide_lock, flags);
1868 #ifdef CONFIG_PROC_FS
1869 ide_remove_proc_entries(drive->proc, driver->proc);
1870 #endif
1871 auto_remove_settings(drive);
1872 spin_unlock_irqrestore(&ide_lock, flags);
1873 up(&ide_setting_sem);
1874 }
1875
1876 EXPORT_SYMBOL(ide_unregister_subdriver);
1877
1878 /*
1879 * Probe module
1880 */
1881
1882 EXPORT_SYMBOL(ide_lock);
1883
1884 static int ide_bus_match(struct device *dev, struct device_driver *drv)
1885 {
1886 return 1;
1887 }
1888
1889 static char *media_string(ide_drive_t *drive)
1890 {
1891 switch (drive->media) {
1892 case ide_disk:
1893 return "disk";
1894 case ide_cdrom:
1895 return "cdrom";
1896 case ide_tape:
1897 return "tape";
1898 case ide_floppy:
1899 return "floppy";
1900 default:
1901 return "UNKNOWN";
1902 }
1903 }
1904
1905 static ssize_t media_show(struct device *dev, struct device_attribute *attr, char *buf)
1906 {
1907 ide_drive_t *drive = to_ide_device(dev);
1908 return sprintf(buf, "%s\n", media_string(drive));
1909 }
1910
1911 static ssize_t drivename_show(struct device *dev, struct device_attribute *attr, char *buf)
1912 {
1913 ide_drive_t *drive = to_ide_device(dev);
1914 return sprintf(buf, "%s\n", drive->name);
1915 }
1916
1917 static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf)
1918 {
1919 ide_drive_t *drive = to_ide_device(dev);
1920 return sprintf(buf, "ide:m-%s\n", media_string(drive));
1921 }
1922
1923 static struct device_attribute ide_dev_attrs[] = {
1924 __ATTR_RO(media),
1925 __ATTR_RO(drivename),
1926 __ATTR_RO(modalias),
1927 __ATTR_NULL
1928 };
1929
1930 static int ide_uevent(struct device *dev, char **envp, int num_envp,
1931 char *buffer, int buffer_size)
1932 {
1933 ide_drive_t *drive = to_ide_device(dev);
1934 int i = 0;
1935 int length = 0;
1936
1937 add_uevent_var(envp, num_envp, &i, buffer, buffer_size, &length,
1938 "MEDIA=%s", media_string(drive));
1939 add_uevent_var(envp, num_envp, &i, buffer, buffer_size, &length,
1940 "DRIVENAME=%s", drive->name);
1941 add_uevent_var(envp, num_envp, &i, buffer, buffer_size, &length,
1942 "MODALIAS=ide:m-%s", media_string(drive));
1943 envp[i] = NULL;
1944 return 0;
1945 }
1946
1947 static int generic_ide_probe(struct device *dev)
1948 {
1949 ide_drive_t *drive = to_ide_device(dev);
1950 ide_driver_t *drv = to_ide_driver(dev->driver);
1951
1952 return drv->probe ? drv->probe(drive) : -ENODEV;
1953 }
1954
1955 static int generic_ide_remove(struct device *dev)
1956 {
1957 ide_drive_t *drive = to_ide_device(dev);
1958 ide_driver_t *drv = to_ide_driver(dev->driver);
1959
1960 if (drv->remove)
1961 drv->remove(drive);
1962
1963 return 0;
1964 }
1965
1966 static void generic_ide_shutdown(struct device *dev)
1967 {
1968 ide_drive_t *drive = to_ide_device(dev);
1969 ide_driver_t *drv = to_ide_driver(dev->driver);
1970
1971 if (dev->driver && drv->shutdown)
1972 drv->shutdown(drive);
1973 }
1974
1975 struct bus_type ide_bus_type = {
1976 .name = "ide",
1977 .match = ide_bus_match,
1978 .uevent = ide_uevent,
1979 .probe = generic_ide_probe,
1980 .remove = generic_ide_remove,
1981 .shutdown = generic_ide_shutdown,
1982 .dev_attrs = ide_dev_attrs,
1983 .suspend = generic_ide_suspend,
1984 .resume = generic_ide_resume,
1985 };
1986
1987 EXPORT_SYMBOL_GPL(ide_bus_type);
1988
1989 /*
1990 * This is gets invoked once during initialization, to set *everything* up
1991 */
1992 static int __init ide_init(void)
1993 {
1994 printk(KERN_INFO "Uniform Multi-Platform E-IDE driver " REVISION "\n");
1995 system_bus_speed = ide_system_bus_speed();
1996
1997 bus_register(&ide_bus_type);
1998
1999 init_ide_data();
2000
2001 #ifdef CONFIG_PROC_FS
2002 proc_ide_root = proc_mkdir("ide", NULL);
2003 #endif
2004
2005 #ifdef CONFIG_BLK_DEV_ALI14XX
2006 if (probe_ali14xx)
2007 (void)ali14xx_init();
2008 #endif
2009 #ifdef CONFIG_BLK_DEV_UMC8672
2010 if (probe_umc8672)
2011 (void)umc8672_init();
2012 #endif
2013 #ifdef CONFIG_BLK_DEV_DTC2278
2014 if (probe_dtc2278)
2015 (void)dtc2278_init();
2016 #endif
2017 #ifdef CONFIG_BLK_DEV_HT6560B
2018 if (probe_ht6560b)
2019 (void)ht6560b_init();
2020 #endif
2021 #ifdef CONFIG_BLK_DEV_QD65XX
2022 if (probe_qd65xx)
2023 (void)qd65xx_init();
2024 #endif
2025
2026 initializing = 1;
2027 /* Probe for special PCI and other "known" interface chipsets. */
2028 probe_for_hwifs();
2029 initializing = 0;
2030
2031 #ifdef CONFIG_PROC_FS
2032 proc_ide_create();
2033 #endif
2034 return 0;
2035 }
2036
2037 #ifdef MODULE
2038 static char *options = NULL;
2039 module_param(options, charp, 0);
2040 MODULE_LICENSE("GPL");
2041
2042 static void __init parse_options (char *line)
2043 {
2044 char *next = line;
2045
2046 if (line == NULL || !*line)
2047 return;
2048 while ((line = next) != NULL) {
2049 if ((next = strchr(line,' ')) != NULL)
2050 *next++ = 0;
2051 if (!ide_setup(line))
2052 printk (KERN_INFO "Unknown option '%s'\n", line);
2053 }
2054 }
2055
2056 int __init init_module (void)
2057 {
2058 parse_options(options);
2059 return ide_init();
2060 }
2061
2062 void cleanup_module (void)
2063 {
2064 int index;
2065
2066 for (index = 0; index < MAX_HWIFS; ++index)
2067 ide_unregister(index);
2068
2069 #ifdef CONFIG_PROC_FS
2070 proc_ide_destroy();
2071 #endif
2072
2073 bus_unregister(&ide_bus_type);
2074 }
2075
2076 #else /* !MODULE */
2077
2078 __setup("", ide_setup);
2079
2080 module_init(ide_init);
2081
2082 #endif /* MODULE */
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