?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
[EBTABLES]: Fix wraparounds in ebt_entries verification.
[linux-2.6/linux-mips.git] / drivers / ide / ide.c
blob287a66201150a0bd32432817a4357705b767329c
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 settings
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->config_data = tmp_hwif->config_data;
543 hwif->select_data = tmp_hwif->select_data;
544 hwif->extra_base = tmp_hwif->extra_base;
545 hwif->extra_ports = tmp_hwif->extra_ports;
546 hwif->autodma = tmp_hwif->autodma;
547 hwif->udma_four = tmp_hwif->udma_four;
548 hwif->no_dsc = tmp_hwif->no_dsc;
549
550 hwif->hwif_data = tmp_hwif->hwif_data;
551 }
552
553 /**
554 * ide_unregister - free an IDE interface
555 * @index: index of interface (will change soon to a pointer)
556 *
557 * Perform the final unregister of an IDE interface. At the moment
558 * we don't refcount interfaces so this will also get split up.
559 *
560 * Locking:
561 * The caller must not hold the IDE locks
562 * The drive present/vanishing is not yet properly locked
563 * Take care with the callbacks. These have been split to avoid
564 * deadlocking the IDE layer. The shutdown callback is called
565 * before we take the lock and free resources. It is up to the
566 * caller to be sure there is no pending I/O here, and that
567 * the interface will not be reopened (present/vanishing locking
568 * isn't yet done BTW). After we commit to the final kill we
569 * call the cleanup callback with the ide locks held.
570 *
571 * Unregister restores the hwif structures to the default state.
572 * This is raving bonkers.
573 */
574
575 void ide_unregister(unsigned int index)
576 {
577 ide_drive_t *drive;
578 ide_hwif_t *hwif, *g;
579 static ide_hwif_t tmp_hwif; /* protected by ide_cfg_sem */
580 ide_hwgroup_t *hwgroup;
581 int irq_count = 0, unit;
582
583 BUG_ON(index >= MAX_HWIFS);
584
585 BUG_ON(in_interrupt());
586 BUG_ON(irqs_disabled());
587 down(&ide_cfg_sem);
588 spin_lock_irq(&ide_lock);
589 hwif = &ide_hwifs[index];
590 if (!hwif->present)
591 goto abort;
592 for (unit = 0; unit < MAX_DRIVES; ++unit) {
593 drive = &hwif->drives[unit];
594 if (!drive->present)
595 continue;
596 spin_unlock_irq(&ide_lock);
597 device_unregister(&drive->gendev);
598 wait_for_completion(&drive->gendev_rel_comp);
599 spin_lock_irq(&ide_lock);
600 }
601 hwif->present = 0;
602
603 spin_unlock_irq(&ide_lock);
604
605 destroy_proc_ide_interface(hwif);
606
607 hwgroup = hwif->hwgroup;
608 /*
609 * free the irq if we were the only hwif using it
610 */
611 g = hwgroup->hwif;
612 do {
613 if (g->irq == hwif->irq)
614 ++irq_count;
615 g = g->next;
616 } while (g != hwgroup->hwif);
617 if (irq_count == 1)
618 free_irq(hwif->irq, hwgroup);
619
620 spin_lock_irq(&ide_lock);
621 /*
622 * Note that we only release the standard ports,
623 * and do not even try to handle any extra ports
624 * allocated for weird IDE interface chipsets.
625 */
626 ide_hwif_release_regions(hwif);
627
628 /*
629 * Remove us from the hwgroup, and free
630 * the hwgroup if we were the only member
631 */
632 if (hwif->next == hwif) {
633 BUG_ON(hwgroup->hwif != hwif);
634 kfree(hwgroup);
635 } else {
636 /* There is another interface in hwgroup.
637 * Unlink us, and set hwgroup->drive and ->hwif to
638 * something sane.
639 */
640 g = hwgroup->hwif;
641 while (g->next != hwif)
642 g = g->next;
643 g->next = hwif->next;
644 if (hwgroup->hwif == hwif) {
645 /* Chose a random hwif for hwgroup->hwif.
646 * It's guaranteed that there are no drives
647 * left in the hwgroup.
648 */
649 BUG_ON(hwgroup->drive != NULL);
650 hwgroup->hwif = g;
651 }
652 BUG_ON(hwgroup->hwif == hwif);
653 }
654
655 /* More messed up locking ... */
656 spin_unlock_irq(&ide_lock);
657 device_unregister(&hwif->gendev);
658 wait_for_completion(&hwif->gendev_rel_comp);
659
660 /*
661 * Remove us from the kernel's knowledge
662 */
663 blk_unregister_region(MKDEV(hwif->major, 0), MAX_DRIVES<<PARTN_BITS);
664 kfree(hwif->sg_table);
665 unregister_blkdev(hwif->major, hwif->name);
666 spin_lock_irq(&ide_lock);
667
668 if (hwif->dma_base) {
669 (void) ide_release_dma(hwif);
670
671 hwif->dma_base = 0;
672 hwif->dma_master = 0;
673 hwif->dma_command = 0;
674 hwif->dma_vendor1 = 0;
675 hwif->dma_status = 0;
676 hwif->dma_vendor3 = 0;
677 hwif->dma_prdtable = 0;
678
679 hwif->extra_base = 0;
680 hwif->extra_ports = 0;
681 }
682
683 /* copy original settings */
684 tmp_hwif = *hwif;
685
686 /* restore hwif data to pristine status */
687 init_hwif_data(hwif, index);
688 init_hwif_default(hwif, index);
689
690 ide_hwif_restore(hwif, &tmp_hwif);
691
692 abort:
693 spin_unlock_irq(&ide_lock);
694 up(&ide_cfg_sem);
695 }
696
697 EXPORT_SYMBOL(ide_unregister);
698
699
700 /**
701 * ide_setup_ports - set up IDE interface ports
702 * @hw: register descriptions
703 * @base: base register
704 * @offsets: table of register offsets
705 * @ctrl: control register
706 * @ack_irq: IRQ ack
707 * @irq: interrupt lie
708 *
709 * Setup hw_regs_t structure described by parameters. You
710 * may set up the hw structure yourself OR use this routine to
711 * do it for you. This is basically a helper
712 *
713 */
714
715 void ide_setup_ports ( hw_regs_t *hw,
716 unsigned long base, int *offsets,
717 unsigned long ctrl, unsigned long intr,
718 ide_ack_intr_t *ack_intr,
719 /*
720 * ide_io_ops_t *iops,
721 */
722 int irq)
723 {
724 int i;
725
726 memset(hw, 0, sizeof(hw_regs_t));
727 for (i = 0; i < IDE_NR_PORTS; i++) {
728 if (offsets[i] == -1) {
729 switch(i) {
730 case IDE_CONTROL_OFFSET:
731 hw->io_ports[i] = ctrl;
732 break;
733 #if defined(CONFIG_AMIGA) || defined(CONFIG_MAC)
734 case IDE_IRQ_OFFSET:
735 hw->io_ports[i] = intr;
736 break;
737 #endif /* (CONFIG_AMIGA) || (CONFIG_MAC) */
738 default:
739 hw->io_ports[i] = 0;
740 break;
741 }
742 } else {
743 hw->io_ports[i] = base + offsets[i];
744 }
745 }
746 hw->irq = irq;
747 hw->dma = NO_DMA;
748 hw->ack_intr = ack_intr;
749 /*
750 * hw->iops = iops;
751 */
752 }
753
754 /**
755 * ide_register_hw_with_fixup - register IDE interface
756 * @hw: hardware registers
757 * @hwifp: pointer to returned hwif
758 * @fixup: fixup function
759 *
760 * Register an IDE interface, specifying exactly the registers etc.
761 * Set init=1 iff calling before probes have taken place.
762 *
763 * Returns -1 on error.
764 */
765
766 int ide_register_hw_with_fixup(hw_regs_t *hw, ide_hwif_t **hwifp, void(*fixup)(ide_hwif_t *hwif))
767 {
768 int index, retry = 1;
769 ide_hwif_t *hwif;
770
771 do {
772 for (index = 0; index < MAX_HWIFS; ++index) {
773 hwif = &ide_hwifs[index];
774 if (hwif->hw.io_ports[IDE_DATA_OFFSET] == hw->io_ports[IDE_DATA_OFFSET])
775 goto found;
776 }
777 for (index = 0; index < MAX_HWIFS; ++index) {
778 hwif = &ide_hwifs[index];
779 if (hwif->hold)
780 continue;
781 if ((!hwif->present && !hwif->mate && !initializing) ||
782 (!hwif->hw.io_ports[IDE_DATA_OFFSET] && initializing))
783 goto found;
784 }
785 for (index = 0; index < MAX_HWIFS; index++)
786 ide_unregister(index);
787 } while (retry--);
788 return -1;
789 found:
790 if (hwif->present)
791 ide_unregister(index);
792 else if (!hwif->hold) {
793 init_hwif_data(hwif, index);
794 init_hwif_default(hwif, index);
795 }
796 if (hwif->present)
797 return -1;
798 memcpy(&hwif->hw, hw, sizeof(*hw));
799 memcpy(hwif->io_ports, hwif->hw.io_ports, sizeof(hwif->hw.io_ports));
800 hwif->irq = hw->irq;
801 hwif->noprobe = 0;
802 hwif->chipset = hw->chipset;
803 hwif->gendev.parent = hw->dev;
804
805 if (!initializing) {
806 probe_hwif_init_with_fixup(hwif, fixup);
807 create_proc_ide_interfaces();
808 }
809
810 if (hwifp)
811 *hwifp = hwif;
812
813 return (initializing || hwif->present) ? index : -1;
814 }
815
816 EXPORT_SYMBOL(ide_register_hw_with_fixup);
817
818 int ide_register_hw(hw_regs_t *hw, ide_hwif_t **hwifp)
819 {
820 return ide_register_hw_with_fixup(hw, hwifp, NULL);
821 }
822
823 EXPORT_SYMBOL(ide_register_hw);
824
825 /*
826 * Locks for IDE setting functionality
827 */
828
829 DECLARE_MUTEX(ide_setting_sem);
830
831 /**
832 * __ide_add_setting - add an ide setting option
833 * @drive: drive to use
834 * @name: setting name
835 * @rw: true if the function is read write
836 * @read_ioctl: function to call on read
837 * @write_ioctl: function to call on write
838 * @data_type: type of data
839 * @min: range minimum
840 * @max: range maximum
841 * @mul_factor: multiplication scale
842 * @div_factor: divison scale
843 * @data: private data field
844 * @set: setting
845 * @auto_remove: setting auto removal flag
846 *
847 * Removes the setting named from the device if it is present.
848 * The function takes the settings_lock to protect against
849 * parallel changes. This function must not be called from IRQ
850 * context. Returns 0 on success or -1 on failure.
851 *
852 * BUGS: This code is seriously over-engineered. There is also
853 * magic about how the driver specific features are setup. If
854 * a driver is attached we assume the driver settings are auto
855 * remove.
856 */
857
858 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)
859 {
860 ide_settings_t **p = (ide_settings_t **) &drive->settings, *setting = NULL;
861
862 down(&ide_setting_sem);
863 while ((*p) && strcmp((*p)->name, name) < 0)
864 p = &((*p)->next);
865 if ((setting = kzalloc(sizeof(*setting), GFP_KERNEL)) == NULL)
866 goto abort;
867 if ((setting->name = kmalloc(strlen(name) + 1, GFP_KERNEL)) == NULL)
868 goto abort;
869 strcpy(setting->name, name);
870 setting->rw = rw;
871 setting->read_ioctl = read_ioctl;
872 setting->write_ioctl = write_ioctl;
873 setting->data_type = data_type;
874 setting->min = min;
875 setting->max = max;
876 setting->mul_factor = mul_factor;
877 setting->div_factor = div_factor;
878 setting->data = data;
879 setting->set = set;
880
881 setting->next = *p;
882 if (auto_remove)
883 setting->auto_remove = 1;
884 *p = setting;
885 up(&ide_setting_sem);
886 return 0;
887 abort:
888 up(&ide_setting_sem);
889 kfree(setting);
890 return -1;
891 }
892
893 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)
894 {
895 return __ide_add_setting(drive, name, rw, read_ioctl, write_ioctl, data_type, min, max, mul_factor, div_factor, data, set, 1);
896 }
897
898 EXPORT_SYMBOL(ide_add_setting);
899
900 /**
901 * __ide_remove_setting - remove an ide setting option
902 * @drive: drive to use
903 * @name: setting name
904 *
905 * Removes the setting named from the device if it is present.
906 * The caller must hold the setting semaphore.
907 */
908
909 static void __ide_remove_setting (ide_drive_t *drive, char *name)
910 {
911 ide_settings_t **p, *setting;
912
913 p = (ide_settings_t **) &drive->settings;
914
915 while ((*p) && strcmp((*p)->name, name))
916 p = &((*p)->next);
917 if ((setting = (*p)) == NULL)
918 return;
919
920 (*p) = setting->next;
921
922 kfree(setting->name);
923 kfree(setting);
924 }
925
926 /**
927 * ide_find_setting_by_ioctl - find a drive specific ioctl
928 * @drive: drive to scan
929 * @cmd: ioctl command to handle
930 *
931 * Scan's the device setting table for a matching entry and returns
932 * this or NULL if no entry is found. The caller must hold the
933 * setting semaphore
934 */
935
936 static ide_settings_t *ide_find_setting_by_ioctl (ide_drive_t *drive, int cmd)
937 {
938 ide_settings_t *setting = drive->settings;
939
940 while (setting) {
941 if (setting->read_ioctl == cmd || setting->write_ioctl == cmd)
942 break;
943 setting = setting->next;
944 }
945
946 return setting;
947 }
948
949 /**
950 * ide_find_setting_by_name - find a drive specific setting
951 * @drive: drive to scan
952 * @name: setting name
953 *
954 * Scan's the device setting table for a matching entry and returns
955 * this or NULL if no entry is found. The caller must hold the
956 * setting semaphore
957 */
958
959 ide_settings_t *ide_find_setting_by_name (ide_drive_t *drive, char *name)
960 {
961 ide_settings_t *setting = drive->settings;
962
963 while (setting) {
964 if (strcmp(setting->name, name) == 0)
965 break;
966 setting = setting->next;
967 }
968 return setting;
969 }
970
971 /**
972 * auto_remove_settings - remove driver specific settings
973 * @drive: drive
974 *
975 * Automatically remove all the driver specific settings for this
976 * drive. This function may sleep and must not be called from IRQ
977 * context. The caller must hold ide_setting_sem.
978 */
979
980 static void auto_remove_settings (ide_drive_t *drive)
981 {
982 ide_settings_t *setting;
983 repeat:
984 setting = drive->settings;
985 while (setting) {
986 if (setting->auto_remove) {
987 __ide_remove_setting(drive, setting->name);
988 goto repeat;
989 }
990 setting = setting->next;
991 }
992 }
993
994 /**
995 * ide_read_setting - read an IDE setting
996 * @drive: drive to read from
997 * @setting: drive setting
998 *
999 * Read a drive setting and return the value. The caller
1000 * must hold the ide_setting_sem when making this call.
1001 *
1002 * BUGS: the data return and error are the same return value
1003 * so an error -EINVAL and true return of the same value cannot
1004 * be told apart
1005 */
1006
1007 int ide_read_setting (ide_drive_t *drive, ide_settings_t *setting)
1008 {
1009 int val = -EINVAL;
1010 unsigned long flags;
1011
1012 if ((setting->rw & SETTING_READ)) {
1013 spin_lock_irqsave(&ide_lock, flags);
1014 switch(setting->data_type) {
1015 case TYPE_BYTE:
1016 val = *((u8 *) setting->data);
1017 break;
1018 case TYPE_SHORT:
1019 val = *((u16 *) setting->data);
1020 break;
1021 case TYPE_INT:
1022 case TYPE_INTA:
1023 val = *((u32 *) setting->data);
1024 break;
1025 }
1026 spin_unlock_irqrestore(&ide_lock, flags);
1027 }
1028 return val;
1029 }
1030
1031 /**
1032 * ide_spin_wait_hwgroup - wait for group
1033 * @drive: drive in the group
1034 *
1035 * Wait for an IDE device group to go non busy and then return
1036 * holding the ide_lock which guards the hwgroup->busy status
1037 * and right to use it.
1038 */
1039
1040 int ide_spin_wait_hwgroup (ide_drive_t *drive)
1041 {
1042 ide_hwgroup_t *hwgroup = HWGROUP(drive);
1043 unsigned long timeout = jiffies + (3 * HZ);
1044
1045 spin_lock_irq(&ide_lock);
1046
1047 while (hwgroup->busy) {
1048 unsigned long lflags;
1049 spin_unlock_irq(&ide_lock);
1050 local_irq_set(lflags);
1051 if (time_after(jiffies, timeout)) {
1052 local_irq_restore(lflags);
1053 printk(KERN_ERR "%s: channel busy\n", drive->name);
1054 return -EBUSY;
1055 }
1056 local_irq_restore(lflags);
1057 spin_lock_irq(&ide_lock);
1058 }
1059 return 0;
1060 }
1061
1062 EXPORT_SYMBOL(ide_spin_wait_hwgroup);
1063
1064 /**
1065 * ide_write_setting - read an IDE setting
1066 * @drive: drive to read from
1067 * @setting: drive setting
1068 * @val: value
1069 *
1070 * Write a drive setting if it is possible. The caller
1071 * must hold the ide_setting_sem when making this call.
1072 *
1073 * BUGS: the data return and error are the same return value
1074 * so an error -EINVAL and true return of the same value cannot
1075 * be told apart
1076 *
1077 * FIXME: This should be changed to enqueue a special request
1078 * to the driver to change settings, and then wait on a sema for completion.
1079 * The current scheme of polling is kludgy, though safe enough.
1080 */
1081
1082 int ide_write_setting (ide_drive_t *drive, ide_settings_t *setting, int val)
1083 {
1084 int i;
1085 u32 *p;
1086
1087 if (!capable(CAP_SYS_ADMIN))
1088 return -EACCES;
1089 if (!(setting->rw & SETTING_WRITE))
1090 return -EPERM;
1091 if (val < setting->min || val > setting->max)
1092 return -EINVAL;
1093 if (setting->set)
1094 return setting->set(drive, val);
1095 if (ide_spin_wait_hwgroup(drive))
1096 return -EBUSY;
1097 switch (setting->data_type) {
1098 case TYPE_BYTE:
1099 *((u8 *) setting->data) = val;
1100 break;
1101 case TYPE_SHORT:
1102 *((u16 *) setting->data) = val;
1103 break;
1104 case TYPE_INT:
1105 *((u32 *) setting->data) = val;
1106 break;
1107 case TYPE_INTA:
1108 p = (u32 *) setting->data;
1109 for (i = 0; i < 1 << PARTN_BITS; i++, p++)
1110 *p = val;
1111 break;
1112 }
1113 spin_unlock_irq(&ide_lock);
1114 return 0;
1115 }
1116
1117 static int set_io_32bit(ide_drive_t *drive, int arg)
1118 {
1119 drive->io_32bit = arg;
1120 #ifdef CONFIG_BLK_DEV_DTC2278
1121 if (HWIF(drive)->chipset == ide_dtc2278)
1122 HWIF(drive)->drives[!drive->select.b.unit].io_32bit = arg;
1123 #endif /* CONFIG_BLK_DEV_DTC2278 */
1124 return 0;
1125 }
1126
1127 static int set_using_dma (ide_drive_t *drive, int arg)
1128 {
1129 #ifdef CONFIG_BLK_DEV_IDEDMA
1130 if (!drive->id || !(drive->id->capability & 1))
1131 return -EPERM;
1132 if (HWIF(drive)->ide_dma_check == NULL)
1133 return -EPERM;
1134 if (arg) {
1135 if (HWIF(drive)->ide_dma_check(drive)) return -EIO;
1136 if (HWIF(drive)->ide_dma_on(drive)) return -EIO;
1137 } else {
1138 if (__ide_dma_off(drive))
1139 return -EIO;
1140 }
1141 return 0;
1142 #else
1143 return -EPERM;
1144 #endif
1145 }
1146
1147 static int set_pio_mode (ide_drive_t *drive, int arg)
1148 {
1149 struct request rq;
1150
1151 if (!HWIF(drive)->tuneproc)
1152 return -ENOSYS;
1153 if (drive->special.b.set_tune)
1154 return -EBUSY;
1155 ide_init_drive_cmd(&rq);
1156 drive->tune_req = (u8) arg;
1157 drive->special.b.set_tune = 1;
1158 (void) ide_do_drive_cmd(drive, &rq, ide_wait);
1159 return 0;
1160 }
1161
1162 static int set_xfer_rate (ide_drive_t *drive, int arg)
1163 {
1164 int err = ide_wait_cmd(drive,
1165 WIN_SETFEATURES, (u8) arg,
1166 SETFEATURES_XFER, 0, NULL);
1167
1168 if (!err && arg) {
1169 ide_set_xfer_rate(drive, (u8) arg);
1170 ide_driveid_update(drive);
1171 }
1172 return err;
1173 }
1174
1175 /**
1176 * ide_add_generic_settings - generic ide settings
1177 * @drive: drive being configured
1178 *
1179 * Add the generic parts of the system settings to the /proc files and
1180 * ioctls for this IDE device. The caller must not be holding the
1181 * ide_setting_sem.
1182 */
1183
1184 void ide_add_generic_settings (ide_drive_t *drive)
1185 {
1186 /*
1187 * drive setting name read/write access read ioctl write ioctl data type min max mul_factor div_factor data pointer set function
1188 */
1189 __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);
1190 __ide_add_setting(drive, "keepsettings", SETTING_RW, HDIO_GET_KEEPSETTINGS, HDIO_SET_KEEPSETTINGS, TYPE_BYTE, 0, 1, 1, 1, &drive->keep_settings, NULL, 0);
1191 __ide_add_setting(drive, "nice1", SETTING_RW, -1, -1, TYPE_BYTE, 0, 1, 1, 1, &drive->nice1, NULL, 0);
1192 __ide_add_setting(drive, "pio_mode", SETTING_WRITE, -1, HDIO_SET_PIO_MODE, TYPE_BYTE, 0, 255, 1, 1, NULL, set_pio_mode, 0);
1193 __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);
1194 __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);
1195 __ide_add_setting(drive, "init_speed", SETTING_RW, -1, -1, TYPE_BYTE, 0, 70, 1, 1, &drive->init_speed, NULL, 0);
1196 __ide_add_setting(drive, "current_speed", SETTING_RW, -1, -1, TYPE_BYTE, 0, 70, 1, 1, &drive->current_speed, set_xfer_rate, 0);
1197 __ide_add_setting(drive, "number", SETTING_RW, -1, -1, TYPE_BYTE, 0, 3, 1, 1, &drive->dn, NULL, 0);
1198 }
1199
1200 /**
1201 * system_bus_clock - clock guess
1202 *
1203 * External version of the bus clock guess used by very old IDE drivers
1204 * for things like VLB timings. Should not be used.
1205 */
1206
1207 int system_bus_clock (void)
1208 {
1209 return((int) ((!system_bus_speed) ? ide_system_bus_speed() : system_bus_speed ));
1210 }
1211
1212 EXPORT_SYMBOL(system_bus_clock);
1213
1214 static int generic_ide_suspend(struct device *dev, pm_message_t mesg)
1215 {
1216 ide_drive_t *drive = dev->driver_data;
1217 struct request rq;
1218 struct request_pm_state rqpm;
1219 ide_task_t args;
1220
1221 memset(&rq, 0, sizeof(rq));
1222 memset(&rqpm, 0, sizeof(rqpm));
1223 memset(&args, 0, sizeof(args));
1224 rq.cmd_type = REQ_TYPE_PM_SUSPEND;
1225 rq.special = &args;
1226 rq.data = &rqpm;
1227 rqpm.pm_step = ide_pm_state_start_suspend;
1228 if (mesg.event == PM_EVENT_PRETHAW)
1229 mesg.event = PM_EVENT_FREEZE;
1230 rqpm.pm_state = mesg.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.cmd_type = REQ_TYPE_PM_RESUME;
1246 rq.special = &args;
1247 rq.data = &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_OBSOLETE_IDENTITY:
1281 case HDIO_GET_IDENTITY:
1282 if (bdev != bdev->bd_contains)
1283 return -EINVAL;
1284 if (drive->id_read == 0)
1285 return -ENOMSG;
1286 if (copy_to_user(p, drive->id, (cmd == HDIO_GET_IDENTITY) ? sizeof(*drive->id) : 142))
1287 return -EFAULT;
1288 return 0;
1289
1290 case HDIO_GET_NICE:
1291 return put_user(drive->dsc_overlap << IDE_NICE_DSC_OVERLAP |
1292 drive->atapi_overlap << IDE_NICE_ATAPI_OVERLAP |
1293 drive->nice0 << IDE_NICE_0 |
1294 drive->nice1 << IDE_NICE_1 |
1295 drive->nice2 << IDE_NICE_2,
1296 (long __user *) arg);
1297
1298 #ifdef CONFIG_IDE_TASK_IOCTL
1299 case HDIO_DRIVE_TASKFILE:
1300 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
1301 return -EACCES;
1302 switch(drive->media) {
1303 case ide_disk:
1304 return ide_taskfile_ioctl(drive, cmd, arg);
1305 default:
1306 return -ENOMSG;
1307 }
1308 #endif /* CONFIG_IDE_TASK_IOCTL */
1309
1310 case HDIO_DRIVE_CMD:
1311 if (!capable(CAP_SYS_RAWIO))
1312 return -EACCES;
1313 return ide_cmd_ioctl(drive, cmd, arg);
1314
1315 case HDIO_DRIVE_TASK:
1316 if (!capable(CAP_SYS_RAWIO))
1317 return -EACCES;
1318 return ide_task_ioctl(drive, cmd, arg);
1319
1320 case HDIO_SCAN_HWIF:
1321 {
1322 hw_regs_t hw;
1323 int args[3];
1324 if (!capable(CAP_SYS_RAWIO)) return -EACCES;
1325 if (copy_from_user(args, p, 3 * sizeof(int)))
1326 return -EFAULT;
1327 memset(&hw, 0, sizeof(hw));
1328 ide_init_hwif_ports(&hw, (unsigned long) args[0],
1329 (unsigned long) args[1], NULL);
1330 hw.irq = args[2];
1331 if (ide_register_hw(&hw, NULL) == -1)
1332 return -EIO;
1333 return 0;
1334 }
1335 case HDIO_UNREGISTER_HWIF:
1336 if (!capable(CAP_SYS_RAWIO)) return -EACCES;
1337 /* (arg > MAX_HWIFS) checked in function */
1338 ide_unregister(arg);
1339 return 0;
1340 case HDIO_SET_NICE:
1341 if (!capable(CAP_SYS_ADMIN)) return -EACCES;
1342 if (arg != (arg & ((1 << IDE_NICE_DSC_OVERLAP) | (1 << IDE_NICE_1))))
1343 return -EPERM;
1344 drive->dsc_overlap = (arg >> IDE_NICE_DSC_OVERLAP) & 1;
1345 drv = *(ide_driver_t **)bdev->bd_disk->private_data;
1346 if (drive->dsc_overlap && !drv->supports_dsc_overlap) {
1347 drive->dsc_overlap = 0;
1348 return -EPERM;
1349 }
1350 drive->nice1 = (arg >> IDE_NICE_1) & 1;
1351 return 0;
1352 case HDIO_DRIVE_RESET:
1353 {
1354 unsigned long flags;
1355 if (!capable(CAP_SYS_ADMIN)) return -EACCES;
1356
1357 /*
1358 * Abort the current command on the
1359 * group if there is one, taking
1360 * care not to allow anything else
1361 * to be queued and to die on the
1362 * spot if we miss one somehow
1363 */
1364
1365 spin_lock_irqsave(&ide_lock, flags);
1366
1367 if (HWGROUP(drive)->resetting) {
1368 spin_unlock_irqrestore(&ide_lock, flags);
1369 return -EBUSY;
1370 }
1371
1372 ide_abort(drive, "drive reset");
1373
1374 BUG_ON(HWGROUP(drive)->handler);
1375
1376 /* Ensure nothing gets queued after we
1377 drop the lock. Reset will clear the busy */
1378
1379 HWGROUP(drive)->busy = 1;
1380 spin_unlock_irqrestore(&ide_lock, flags);
1381 (void) ide_do_reset(drive);
1382
1383 return 0;
1384 }
1385
1386 case CDROMEJECT:
1387 case CDROMCLOSETRAY:
1388 return scsi_cmd_ioctl(file, bdev->bd_disk, cmd, p);
1389
1390 case HDIO_GET_BUSSTATE:
1391 if (!capable(CAP_SYS_ADMIN))
1392 return -EACCES;
1393 if (put_user(HWIF(drive)->bus_state, (long __user *)arg))
1394 return -EFAULT;
1395 return 0;
1396
1397 case HDIO_SET_BUSSTATE:
1398 if (!capable(CAP_SYS_ADMIN))
1399 return -EACCES;
1400 if (HWIF(drive)->busproc)
1401 return HWIF(drive)->busproc(drive, (int)arg);
1402 return -EOPNOTSUPP;
1403 default:
1404 return -EINVAL;
1405 }
1406 }
1407
1408 EXPORT_SYMBOL(generic_ide_ioctl);
1409
1410 /*
1411 * stridx() returns the offset of c within s,
1412 * or -1 if c is '\0' or not found within s.
1413 */
1414 static int __init stridx (const char *s, char c)
1415 {
1416 char *i = strchr(s, c);
1417 return (i && c) ? i - s : -1;
1418 }
1419
1420 /*
1421 * match_parm() does parsing for ide_setup():
1422 *
1423 * 1. the first char of s must be '='.
1424 * 2. if the remainder matches one of the supplied keywords,
1425 * the index (1 based) of the keyword is negated and returned.
1426 * 3. if the remainder is a series of no more than max_vals numbers
1427 * separated by commas, the numbers are saved in vals[] and a
1428 * count of how many were saved is returned. Base10 is assumed,
1429 * and base16 is allowed when prefixed with "0x".
1430 * 4. otherwise, zero is returned.
1431 */
1432 static int __init match_parm (char *s, const char *keywords[], int vals[], int max_vals)
1433 {
1434 static const char *decimal = "0123456789";
1435 static const char *hex = "0123456789abcdef";
1436 int i, n;
1437
1438 if (*s++ == '=') {
1439 /*
1440 * Try matching against the supplied keywords,
1441 * and return -(index+1) if we match one
1442 */
1443 if (keywords != NULL) {
1444 for (i = 0; *keywords != NULL; ++i) {
1445 if (!strcmp(s, *keywords++))
1446 return -(i+1);
1447 }
1448 }
1449 /*
1450 * Look for a series of no more than "max_vals"
1451 * numeric values separated by commas, in base10,
1452 * or base16 when prefixed with "0x".
1453 * Return a count of how many were found.
1454 */
1455 for (n = 0; (i = stridx(decimal, *s)) >= 0;) {
1456 vals[n] = i;
1457 while ((i = stridx(decimal, *++s)) >= 0)
1458 vals[n] = (vals[n] * 10) + i;
1459 if (*s == 'x' && !vals[n]) {
1460 while ((i = stridx(hex, *++s)) >= 0)
1461 vals[n] = (vals[n] * 0x10) + i;
1462 }
1463 if (++n == max_vals)
1464 break;
1465 if (*s == ',' || *s == ';')
1466 ++s;
1467 }
1468 if (!*s)
1469 return n;
1470 }
1471 return 0; /* zero = nothing matched */
1472 }
1473
1474 #ifdef CONFIG_BLK_DEV_ALI14XX
1475 static int __initdata probe_ali14xx;
1476 extern int ali14xx_init(void);
1477 #endif
1478 #ifdef CONFIG_BLK_DEV_UMC8672
1479 static int __initdata probe_umc8672;
1480 extern int umc8672_init(void);
1481 #endif
1482 #ifdef CONFIG_BLK_DEV_DTC2278
1483 static int __initdata probe_dtc2278;
1484 extern int dtc2278_init(void);
1485 #endif
1486 #ifdef CONFIG_BLK_DEV_HT6560B
1487 static int __initdata probe_ht6560b;
1488 extern int ht6560b_init(void);
1489 #endif
1490 #ifdef CONFIG_BLK_DEV_QD65XX
1491 static int __initdata probe_qd65xx;
1492 extern int qd65xx_init(void);
1493 #endif
1494
1495 static int __initdata is_chipset_set[MAX_HWIFS];
1496
1497 /*
1498 * ide_setup() gets called VERY EARLY during initialization,
1499 * to handle kernel "command line" strings beginning with "hdx=" or "ide".
1500 *
1501 * Remember to update Documentation/ide.txt if you change something here.
1502 */
1503 static int __init ide_setup(char *s)
1504 {
1505 int i, vals[3];
1506 ide_hwif_t *hwif;
1507 ide_drive_t *drive;
1508 unsigned int hw, unit;
1509 const char max_drive = 'a' + ((MAX_HWIFS * MAX_DRIVES) - 1);
1510 const char max_hwif = '0' + (MAX_HWIFS - 1);
1511
1512
1513 if (strncmp(s,"hd",2) == 0 && s[2] == '=') /* hd= is for hd.c */
1514 return 0; /* driver and not us */
1515
1516 if (strncmp(s,"ide",3) && strncmp(s,"idebus",6) && strncmp(s,"hd",2))
1517 return 0;
1518
1519 printk(KERN_INFO "ide_setup: %s", s);
1520 init_ide_data ();
1521
1522 #ifdef CONFIG_BLK_DEV_IDEDOUBLER
1523 if (!strcmp(s, "ide=doubler")) {
1524 extern int ide_doubler;
1525
1526 printk(" : Enabled support for IDE doublers\n");
1527 ide_doubler = 1;
1528 return 1;
1529 }
1530 #endif /* CONFIG_BLK_DEV_IDEDOUBLER */
1531
1532 if (!strcmp(s, "ide=nodma")) {
1533 printk(" : Prevented DMA\n");
1534 noautodma = 1;
1535 return 1;
1536 }
1537
1538 #ifdef CONFIG_BLK_DEV_IDEPCI
1539 if (!strcmp(s, "ide=reverse")) {
1540 ide_scan_direction = 1;
1541 printk(" : Enabled support for IDE inverse scan order.\n");
1542 return 1;
1543 }
1544 #endif /* CONFIG_BLK_DEV_IDEPCI */
1545
1546 /*
1547 * Look for drive options: "hdx="
1548 */
1549 if (s[0] == 'h' && s[1] == 'd' && s[2] >= 'a' && s[2] <= max_drive) {
1550 const char *hd_words[] = {
1551 "none", "noprobe", "nowerr", "cdrom", "serialize",
1552 "autotune", "noautotune", "minus8", "swapdata", "bswap",
1553 "noflush", "remap", "remap63", "scsi", NULL };
1554 unit = s[2] - 'a';
1555 hw = unit / MAX_DRIVES;
1556 unit = unit % MAX_DRIVES;
1557 hwif = &ide_hwifs[hw];
1558 drive = &hwif->drives[unit];
1559 if (strncmp(s + 4, "ide-", 4) == 0) {
1560 strlcpy(drive->driver_req, s + 4, sizeof(drive->driver_req));
1561 goto done;
1562 }
1563 switch (match_parm(&s[3], hd_words, vals, 3)) {
1564 case -1: /* "none" */
1565 case -2: /* "noprobe" */
1566 drive->noprobe = 1;
1567 goto done;
1568 case -3: /* "nowerr" */
1569 drive->bad_wstat = BAD_R_STAT;
1570 hwif->noprobe = 0;
1571 goto done;
1572 case -4: /* "cdrom" */
1573 drive->present = 1;
1574 drive->media = ide_cdrom;
1575 /* an ATAPI device ignores DRDY */
1576 drive->ready_stat = 0;
1577 hwif->noprobe = 0;
1578 goto done;
1579 case -5: /* "serialize" */
1580 printk(" -- USE \"ide%d=serialize\" INSTEAD", hw);
1581 goto do_serialize;
1582 case -6: /* "autotune" */
1583 drive->autotune = IDE_TUNE_AUTO;
1584 goto obsolete_option;
1585 case -7: /* "noautotune" */
1586 drive->autotune = IDE_TUNE_NOAUTO;
1587 goto obsolete_option;
1588 case -9: /* "swapdata" */
1589 case -10: /* "bswap" */
1590 drive->bswap = 1;
1591 goto done;
1592 case -11: /* noflush */
1593 drive->noflush = 1;
1594 goto done;
1595 case -12: /* "remap" */
1596 drive->remap_0_to_1 = 1;
1597 goto done;
1598 case -13: /* "remap63" */
1599 drive->sect0 = 63;
1600 goto done;
1601 case -14: /* "scsi" */
1602 drive->scsi = 1;
1603 goto done;
1604 case 3: /* cyl,head,sect */
1605 drive->media = ide_disk;
1606 drive->ready_stat = READY_STAT;
1607 drive->cyl = drive->bios_cyl = vals[0];
1608 drive->head = drive->bios_head = vals[1];
1609 drive->sect = drive->bios_sect = vals[2];
1610 drive->present = 1;
1611 drive->forced_geom = 1;
1612 hwif->noprobe = 0;
1613 goto done;
1614 default:
1615 goto bad_option;
1616 }
1617 }
1618
1619 if (s[0] != 'i' || s[1] != 'd' || s[2] != 'e')
1620 goto bad_option;
1621 /*
1622 * Look for bus speed option: "idebus="
1623 */
1624 if (s[3] == 'b' && s[4] == 'u' && s[5] == 's') {
1625 if (match_parm(&s[6], NULL, vals, 1) != 1)
1626 goto bad_option;
1627 if (vals[0] >= 20 && vals[0] <= 66) {
1628 idebus_parameter = vals[0];
1629 } else
1630 printk(" -- BAD BUS SPEED! Expected value from 20 to 66");
1631 goto done;
1632 }
1633 /*
1634 * Look for interface options: "idex="
1635 */
1636 if (s[3] >= '0' && s[3] <= max_hwif) {
1637 /*
1638 * Be VERY CAREFUL changing this: note hardcoded indexes below
1639 * (-8, -9, -10) are reserved to ease the hardcoding.
1640 */
1641 static const char *ide_words[] = {
1642 "noprobe", "serialize", "autotune", "noautotune",
1643 "reset", "dma", "ata66", "minus8", "minus9",
1644 "minus10", "four", "qd65xx", "ht6560b", "cmd640_vlb",
1645 "dtc2278", "umc8672", "ali14xx", NULL };
1646 hw = s[3] - '0';
1647 hwif = &ide_hwifs[hw];
1648 i = match_parm(&s[4], ide_words, vals, 3);
1649
1650 /*
1651 * Cryptic check to ensure chipset not already set for hwif.
1652 * Note: we can't depend on hwif->chipset here.
1653 */
1654 if ((i >= -18 && i <= -11) || (i > 0 && i <= 3)) {
1655 /* chipset already specified */
1656 if (is_chipset_set[hw])
1657 goto bad_option;
1658 if (i > -18 && i <= -11) {
1659 /* these drivers are for "ide0=" only */
1660 if (hw != 0)
1661 goto bad_hwif;
1662 /* chipset already specified for 2nd port */
1663 if (is_chipset_set[hw+1])
1664 goto bad_option;
1665 }
1666 is_chipset_set[hw] = 1;
1667 printk("\n");
1668 }
1669
1670 switch (i) {
1671 #ifdef CONFIG_BLK_DEV_ALI14XX
1672 case -17: /* "ali14xx" */
1673 probe_ali14xx = 1;
1674 goto done;
1675 #endif
1676 #ifdef CONFIG_BLK_DEV_UMC8672
1677 case -16: /* "umc8672" */
1678 probe_umc8672 = 1;
1679 goto done;
1680 #endif
1681 #ifdef CONFIG_BLK_DEV_DTC2278
1682 case -15: /* "dtc2278" */
1683 probe_dtc2278 = 1;
1684 goto done;
1685 #endif
1686 #ifdef CONFIG_BLK_DEV_CMD640
1687 case -14: /* "cmd640_vlb" */
1688 {
1689 extern int cmd640_vlb; /* flag for cmd640.c */
1690 cmd640_vlb = 1;
1691 goto done;
1692 }
1693 #endif
1694 #ifdef CONFIG_BLK_DEV_HT6560B
1695 case -13: /* "ht6560b" */
1696 probe_ht6560b = 1;
1697 goto done;
1698 #endif
1699 #ifdef CONFIG_BLK_DEV_QD65XX
1700 case -12: /* "qd65xx" */
1701 probe_qd65xx = 1;
1702 goto done;
1703 #endif
1704 #ifdef CONFIG_BLK_DEV_4DRIVES
1705 case -11: /* "four" drives on one set of ports */
1706 {
1707 ide_hwif_t *mate = &ide_hwifs[hw^1];
1708 mate->drives[0].select.all ^= 0x20;
1709 mate->drives[1].select.all ^= 0x20;
1710 hwif->chipset = mate->chipset = ide_4drives;
1711 mate->irq = hwif->irq;
1712 memcpy(mate->io_ports, hwif->io_ports, sizeof(hwif->io_ports));
1713 goto do_serialize;
1714 }
1715 #endif /* CONFIG_BLK_DEV_4DRIVES */
1716 case -10: /* minus10 */
1717 case -9: /* minus9 */
1718 case -8: /* minus8 */
1719 goto bad_option;
1720 case -7: /* ata66 */
1721 #ifdef CONFIG_BLK_DEV_IDEPCI
1722 hwif->udma_four = 1;
1723 goto obsolete_option;
1724 #else
1725 goto bad_hwif;
1726 #endif
1727 case -6: /* dma */
1728 hwif->autodma = 1;
1729 goto obsolete_option;
1730 case -5: /* "reset" */
1731 hwif->reset = 1;
1732 goto obsolete_option;
1733 case -4: /* "noautotune" */
1734 hwif->drives[0].autotune = IDE_TUNE_NOAUTO;
1735 hwif->drives[1].autotune = IDE_TUNE_NOAUTO;
1736 goto obsolete_option;
1737 case -3: /* "autotune" */
1738 hwif->drives[0].autotune = IDE_TUNE_AUTO;
1739 hwif->drives[1].autotune = IDE_TUNE_AUTO;
1740 goto obsolete_option;
1741 case -2: /* "serialize" */
1742 do_serialize:
1743 hwif->mate = &ide_hwifs[hw^1];
1744 hwif->mate->mate = hwif;
1745 hwif->serialized = hwif->mate->serialized = 1;
1746 goto obsolete_option;
1747
1748 case -1: /* "noprobe" */
1749 hwif->noprobe = 1;
1750 goto done;
1751
1752 case 1: /* base */
1753 vals[1] = vals[0] + 0x206; /* default ctl */
1754 case 2: /* base,ctl */
1755 vals[2] = 0; /* default irq = probe for it */
1756 case 3: /* base,ctl,irq */
1757 hwif->hw.irq = vals[2];
1758 ide_init_hwif_ports(&hwif->hw, (unsigned long) vals[0], (unsigned long) vals[1], &hwif->irq);
1759 memcpy(hwif->io_ports, hwif->hw.io_ports, sizeof(hwif->io_ports));
1760 hwif->irq = vals[2];
1761 hwif->noprobe = 0;
1762 hwif->chipset = ide_forced;
1763 goto obsolete_option;
1764
1765 case 0: goto bad_option;
1766 default:
1767 printk(" -- SUPPORT NOT CONFIGURED IN THIS KERNEL\n");
1768 return 1;
1769 }
1770 }
1771 bad_option:
1772 printk(" -- BAD OPTION\n");
1773 return 1;
1774 obsolete_option:
1775 printk(" -- OBSOLETE OPTION, WILL BE REMOVED SOON!\n");
1776 return 1;
1777 bad_hwif:
1778 printk("-- NOT SUPPORTED ON ide%d", hw);
1779 done:
1780 printk("\n");
1781 return 1;
1782 }
1783
1784 extern void pnpide_init(void);
1785 extern void h8300_ide_init(void);
1786
1787 /*
1788 * probe_for_hwifs() finds/initializes "known" IDE interfaces
1789 */
1790 static void __init probe_for_hwifs (void)
1791 {
1792 #ifdef CONFIG_BLK_DEV_IDEPCI
1793 ide_scan_pcibus(ide_scan_direction);
1794 #endif /* CONFIG_BLK_DEV_IDEPCI */
1795
1796 #ifdef CONFIG_ETRAX_IDE
1797 {
1798 extern void init_e100_ide(void);
1799 init_e100_ide();
1800 }
1801 #endif /* CONFIG_ETRAX_IDE */
1802 #ifdef CONFIG_BLK_DEV_CMD640
1803 {
1804 extern void ide_probe_for_cmd640x(void);
1805 ide_probe_for_cmd640x();
1806 }
1807 #endif /* CONFIG_BLK_DEV_CMD640 */
1808 #ifdef CONFIG_BLK_DEV_IDE_PMAC
1809 {
1810 extern void pmac_ide_probe(void);
1811 pmac_ide_probe();
1812 }
1813 #endif /* CONFIG_BLK_DEV_IDE_PMAC */
1814 #ifdef CONFIG_BLK_DEV_GAYLE
1815 {
1816 extern void gayle_init(void);
1817 gayle_init();
1818 }
1819 #endif /* CONFIG_BLK_DEV_GAYLE */
1820 #ifdef CONFIG_BLK_DEV_FALCON_IDE
1821 {
1822 extern void falconide_init(void);
1823 falconide_init();
1824 }
1825 #endif /* CONFIG_BLK_DEV_FALCON_IDE */
1826 #ifdef CONFIG_BLK_DEV_MAC_IDE
1827 {
1828 extern void macide_init(void);
1829 macide_init();
1830 }
1831 #endif /* CONFIG_BLK_DEV_MAC_IDE */
1832 #ifdef CONFIG_BLK_DEV_Q40IDE
1833 {
1834 extern void q40ide_init(void);
1835 q40ide_init();
1836 }
1837 #endif /* CONFIG_BLK_DEV_Q40IDE */
1838 #ifdef CONFIG_BLK_DEV_BUDDHA
1839 {
1840 extern void buddha_init(void);
1841 buddha_init();
1842 }
1843 #endif /* CONFIG_BLK_DEV_BUDDHA */
1844 #ifdef CONFIG_BLK_DEV_IDEPNP
1845 pnpide_init();
1846 #endif
1847 #ifdef CONFIG_H8300
1848 h8300_ide_init();
1849 #endif
1850 }
1851
1852 void ide_register_subdriver(ide_drive_t *drive, ide_driver_t *driver)
1853 {
1854 #ifdef CONFIG_PROC_FS
1855 ide_add_proc_entries(drive->proc, driver->proc, drive);
1856 #endif
1857 }
1858
1859 EXPORT_SYMBOL(ide_register_subdriver);
1860
1861 /**
1862 * ide_unregister_subdriver - disconnect drive from driver
1863 * @drive: drive to unplug
1864 * @driver: driver
1865 *
1866 * Disconnect a drive from the driver it was attached to and then
1867 * clean up the various proc files and other objects attached to it.
1868 *
1869 * Takes ide_setting_sem and ide_lock.
1870 * Caller must hold none of the locks.
1871 */
1872
1873 void ide_unregister_subdriver(ide_drive_t *drive, ide_driver_t *driver)
1874 {
1875 unsigned long flags;
1876
1877 down(&ide_setting_sem);
1878 spin_lock_irqsave(&ide_lock, flags);
1879 #ifdef CONFIG_PROC_FS
1880 ide_remove_proc_entries(drive->proc, driver->proc);
1881 #endif
1882 auto_remove_settings(drive);
1883 spin_unlock_irqrestore(&ide_lock, flags);
1884 up(&ide_setting_sem);
1885 }
1886
1887 EXPORT_SYMBOL(ide_unregister_subdriver);
1888
1889 /*
1890 * Probe module
1891 */
1892
1893 EXPORT_SYMBOL(ide_lock);
1894
1895 static int ide_bus_match(struct device *dev, struct device_driver *drv)
1896 {
1897 return 1;
1898 }
1899
1900 static char *media_string(ide_drive_t *drive)
1901 {
1902 switch (drive->media) {
1903 case ide_disk:
1904 return "disk";
1905 case ide_cdrom:
1906 return "cdrom";
1907 case ide_tape:
1908 return "tape";
1909 case ide_floppy:
1910 return "floppy";
1911 default:
1912 return "UNKNOWN";
1913 }
1914 }
1915
1916 static ssize_t media_show(struct device *dev, struct device_attribute *attr, char *buf)
1917 {
1918 ide_drive_t *drive = to_ide_device(dev);
1919 return sprintf(buf, "%s\n", media_string(drive));
1920 }
1921
1922 static ssize_t drivename_show(struct device *dev, struct device_attribute *attr, char *buf)
1923 {
1924 ide_drive_t *drive = to_ide_device(dev);
1925 return sprintf(buf, "%s\n", drive->name);
1926 }
1927
1928 static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf)
1929 {
1930 ide_drive_t *drive = to_ide_device(dev);
1931 return sprintf(buf, "ide:m-%s\n", media_string(drive));
1932 }
1933
1934 static struct device_attribute ide_dev_attrs[] = {
1935 __ATTR_RO(media),
1936 __ATTR_RO(drivename),
1937 __ATTR_RO(modalias),
1938 __ATTR_NULL
1939 };
1940
1941 static int ide_uevent(struct device *dev, char **envp, int num_envp,
1942 char *buffer, int buffer_size)
1943 {
1944 ide_drive_t *drive = to_ide_device(dev);
1945 int i = 0;
1946 int length = 0;
1947
1948 add_uevent_var(envp, num_envp, &i, buffer, buffer_size, &length,
1949 "MEDIA=%s", media_string(drive));
1950 add_uevent_var(envp, num_envp, &i, buffer, buffer_size, &length,
1951 "DRIVENAME=%s", drive->name);
1952 add_uevent_var(envp, num_envp, &i, buffer, buffer_size, &length,
1953 "MODALIAS=ide:m-%s", media_string(drive));
1954 envp[i] = NULL;
1955 return 0;
1956 }
1957
1958 static int generic_ide_probe(struct device *dev)
1959 {
1960 ide_drive_t *drive = to_ide_device(dev);
1961 ide_driver_t *drv = to_ide_driver(dev->driver);
1962
1963 return drv->probe ? drv->probe(drive) : -ENODEV;
1964 }
1965
1966 static int generic_ide_remove(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 (drv->remove)
1972 drv->remove(drive);
1973
1974 return 0;
1975 }
1976
1977 static void generic_ide_shutdown(struct device *dev)
1978 {
1979 ide_drive_t *drive = to_ide_device(dev);
1980 ide_driver_t *drv = to_ide_driver(dev->driver);
1981
1982 if (dev->driver && drv->shutdown)
1983 drv->shutdown(drive);
1984 }
1985
1986 struct bus_type ide_bus_type = {
1987 .name = "ide",
1988 .match = ide_bus_match,
1989 .uevent = ide_uevent,
1990 .probe = generic_ide_probe,
1991 .remove = generic_ide_remove,
1992 .shutdown = generic_ide_shutdown,
1993 .dev_attrs = ide_dev_attrs,
1994 .suspend = generic_ide_suspend,
1995 .resume = generic_ide_resume,
1996 };
1997
1998 EXPORT_SYMBOL_GPL(ide_bus_type);
1999
2000 /*
2001 * This is gets invoked once during initialization, to set *everything* up
2002 */
2003 static int __init ide_init(void)
2004 {
2005 int ret;
2006
2007 printk(KERN_INFO "Uniform Multi-Platform E-IDE driver " REVISION "\n");
2008 system_bus_speed = ide_system_bus_speed();
2009
2010 ret = bus_register(&ide_bus_type);
2011 if (ret < 0) {
2012 printk(KERN_WARNING "IDE: bus_register error: %d\n", ret);
2013 return ret;
2014 }
2015
2016 init_ide_data();
2017
2018 #ifdef CONFIG_PROC_FS
2019 proc_ide_root = proc_mkdir("ide", NULL);
2020 #endif
2021
2022 #ifdef CONFIG_BLK_DEV_ALI14XX
2023 if (probe_ali14xx)
2024 (void)ali14xx_init();
2025 #endif
2026 #ifdef CONFIG_BLK_DEV_UMC8672
2027 if (probe_umc8672)
2028 (void)umc8672_init();
2029 #endif
2030 #ifdef CONFIG_BLK_DEV_DTC2278
2031 if (probe_dtc2278)
2032 (void)dtc2278_init();
2033 #endif
2034 #ifdef CONFIG_BLK_DEV_HT6560B
2035 if (probe_ht6560b)
2036 (void)ht6560b_init();
2037 #endif
2038 #ifdef CONFIG_BLK_DEV_QD65XX
2039 if (probe_qd65xx)
2040 (void)qd65xx_init();
2041 #endif
2042
2043 initializing = 1;
2044 /* Probe for special PCI and other "known" interface chipsets. */
2045 probe_for_hwifs();
2046 initializing = 0;
2047
2048 #ifdef CONFIG_PROC_FS
2049 proc_ide_create();
2050 #endif
2051 return 0;
2052 }
2053
2054 #ifdef MODULE
2055 static char *options = NULL;
2056 module_param(options, charp, 0);
2057 MODULE_LICENSE("GPL");
2058
2059 static void __init parse_options (char *line)
2060 {
2061 char *next = line;
2062
2063 if (line == NULL || !*line)
2064 return;
2065 while ((line = next) != NULL) {
2066 if ((next = strchr(line,' ')) != NULL)
2067 *next++ = 0;
2068 if (!ide_setup(line))
2069 printk (KERN_INFO "Unknown option '%s'\n", line);
2070 }
2071 }
2072
2073 int __init init_module (void)
2074 {
2075 parse_options(options);
2076 return ide_init();
2077 }
2078
2079 void cleanup_module (void)
2080 {
2081 int index;
2082
2083 for (index = 0; index < MAX_HWIFS; ++index)
2084 ide_unregister(index);
2085
2086 #ifdef CONFIG_PROC_FS
2087 proc_ide_destroy();
2088 #endif
2089
2090 bus_unregister(&ide_bus_type);
2091 }
2092
2093 #else /* !MODULE */
2094
2095 __setup("", ide_setup);
2096
2097 module_init(ide_init);
2098
2099 #endif /* MODULE */
Mirror of the linux-mips.org kernel tree