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ide: fix UDMA/MWDMA/SWDMA masks (v3)
[linux-2.6/mini2440.git] / drivers / ide / ide.c
blobc06424fe647ba86e6e388a67db863a4f3d1953f2
1 /*
2 * linux/drivers/ide/ide.c Version 7.00beta2 Mar 05 2003
3 *
4 * Copyright (C) 1994-1998 Linus Torvalds & authors (see below)
5 */
6
7 /*
8 * Mostly written by Mark Lord <mlord@pobox.com>
9 * and Gadi Oxman <gadio@netvision.net.il>
10 * and Andre Hedrick <andre@linux-ide.org>
11 *
12 * See linux/MAINTAINERS for address of current maintainer.
13 *
14 * This is the multiple IDE interface driver, as evolved from hd.c.
15 * It supports up to MAX_HWIFS IDE interfaces, on one or more IRQs
16 * (usually 14 & 15).
17 * There can be up to two drives per interface, as per the ATA-2 spec.
18 *
19 * Primary: ide0, port 0x1f0; major=3; hda is minor=0; hdb is minor=64
20 * Secondary: ide1, port 0x170; major=22; hdc is minor=0; hdd is minor=64
21 * Tertiary: ide2, port 0x???; major=33; hde is minor=0; hdf is minor=64
22 * Quaternary: ide3, port 0x???; major=34; hdg is minor=0; hdh is minor=64
23 * ...
24 *
25 * From hd.c:
26 * |
27 * | It traverses the request-list, using interrupts to jump between functions.
28 * | As nearly all functions can be called within interrupts, we may not sleep.
29 * | Special care is recommended. Have Fun!
30 * |
31 * | modified by Drew Eckhardt to check nr of hd's from the CMOS.
32 * |
33 * | Thanks to Branko Lankester, lankeste@fwi.uva.nl, who found a bug
34 * | in the early extended-partition checks and added DM partitions.
35 * |
36 * | Early work on error handling by Mika Liljeberg (liljeber@cs.Helsinki.FI).
37 * |
38 * | IRQ-unmask, drive-id, multiple-mode, support for ">16 heads",
39 * | and general streamlining by Mark Lord (mlord@pobox.com).
40 *
41 * October, 1994 -- Complete line-by-line overhaul for linux 1.1.x, by:
42 *
43 * Mark Lord (mlord@pobox.com) (IDE Perf.Pkg)
44 * Delman Lee (delman@ieee.org) ("Mr. atdisk2")
45 * Scott Snyder (snyder@fnald0.fnal.gov) (ATAPI IDE cd-rom)
46 *
47 * This was a rewrite of just about everything from hd.c, though some original
48 * code is still sprinkled about. Think of it as a major evolution, with
49 * inspiration from lots of linux users, esp. hamish@zot.apana.org.au
50 *
51 * Version 1.0 ALPHA initial code, primary i/f working okay
52 * Version 1.3 BETA dual i/f on shared irq tested & working!
53 * Version 1.4 BETA added auto probing for irq(s)
54 * Version 1.5 BETA added ALPHA (untested) support for IDE cd-roms,
55 * ...
56 * Version 5.50 allow values as small as 20 for idebus=
57 * Version 5.51 force non io_32bit in drive_cmd_intr()
58 * change delay_10ms() to delay_50ms() to fix problems
59 * Version 5.52 fix incorrect invalidation of removable devices
60 * add "hdx=slow" command line option
61 * Version 5.60 start to modularize the driver; the disk and ATAPI
62 * drivers can be compiled as loadable modules.
63 * move IDE probe code to ide-probe.c
64 * move IDE disk code to ide-disk.c
65 * add support for generic IDE device subdrivers
66 * add m68k code from Geert Uytterhoeven
67 * probe all interfaces by default
68 * add ioctl to (re)probe an interface
69 * Version 6.00 use per device request queues
70 * attempt to optimize shared hwgroup performance
71 * add ioctl to manually adjust bandwidth algorithms
72 * add kerneld support for the probe module
73 * fix bug in ide_error()
74 * fix bug in the first ide_get_lock() call for Atari
75 * don't flush leftover data for ATAPI devices
76 * Version 6.01 clear hwgroup->active while the hwgroup sleeps
77 * support HDIO_GETGEO for floppies
78 * Version 6.02 fix ide_ack_intr() call
79 * check partition table on floppies
80 * Version 6.03 handle bad status bit sequencing in ide_wait_stat()
81 * Version 6.10 deleted old entries from this list of updates
82 * replaced triton.c with ide-dma.c generic PCI DMA
83 * added support for BIOS-enabled UltraDMA
84 * rename all "promise" things to "pdc4030"
85 * fix EZ-DRIVE handling on small disks
86 * Version 6.11 fix probe error in ide_scan_devices()
87 * fix ancient "jiffies" polling bugs
88 * mask all hwgroup interrupts on each irq entry
89 * Version 6.12 integrate ioctl and proc interfaces
90 * fix parsing of "idex=" command line parameter
91 * Version 6.13 add support for ide4/ide5 courtesy rjones@orchestream.com
92 * Version 6.14 fixed IRQ sharing among PCI devices
93 * Version 6.15 added SMP awareness to IDE drivers
94 * Version 6.16 fixed various bugs; even more SMP friendly
95 * Version 6.17 fix for newest EZ-Drive problem
96 * Version 6.18 default unpartitioned-disk translation now "BIOS LBA"
97 * Version 6.19 Re-design for a UNIFORM driver for all platforms,
98 * model based on suggestions from Russell King and
99 * Geert Uytterhoeven
100 * Promise DC4030VL now supported.
101 * add support for ide6/ide7
102 * delay_50ms() changed to ide_delay_50ms() and exported.
103 * Version 6.20 Added/Fixed Generic ATA-66 support and hwif detection.
104 * Added hdx=flash to allow for second flash disk
105 * detection w/o the hang loop.
106 * Added support for ide8/ide9
107 * Added idex=ata66 for the quirky chipsets that are
108 * ATA-66 compliant, but have yet to determine a method
109 * of verification of the 80c cable presence.
110 * Specifically Promise's PDC20262 chipset.
111 * Version 6.21 Fixing/Fixed SMP spinlock issue with insight from an old
112 * hat that clarified original low level driver design.
113 * Version 6.30 Added SMP support; fixed multmode issues. -ml
114 * Version 6.31 Debug Share INTR's and request queue streaming
115 * Native ATA-100 support
116 * Prep for Cascades Project
117 * Version 7.00alpha First named revision of ide rearrange
118 *
119 * Some additional driver compile-time options are in ./include/linux/ide.h
120 *
121 * To do, in likely order of completion:
122 * - modify kernel to obtain BIOS geometry for drives on 2nd/3rd/4th i/f
123 *
124 */
125
126 #define REVISION "Revision: 7.00alpha2"
127 #define VERSION "Id: ide.c 7.00a2 20020906"
128
129 #define _IDE_C /* Tell ide.h it's really us */
130
131 #include <linux/module.h>
132 #include <linux/types.h>
133 #include <linux/string.h>
134 #include <linux/kernel.h>
135 #include <linux/timer.h>
136 #include <linux/mm.h>
137 #include <linux/interrupt.h>
138 #include <linux/major.h>
139 #include <linux/errno.h>
140 #include <linux/genhd.h>
141 #include <linux/blkpg.h>
142 #include <linux/slab.h>
143 #include <linux/init.h>
144 #include <linux/pci.h>
145 #include <linux/delay.h>
146 #include <linux/ide.h>
147 #include <linux/completion.h>
148 #include <linux/reboot.h>
149 #include <linux/cdrom.h>
150 #include <linux/seq_file.h>
151 #include <linux/device.h>
152 #include <linux/bitops.h>
153
154 #include <asm/byteorder.h>
155 #include <asm/irq.h>
156 #include <asm/uaccess.h>
157 #include <asm/io.h>
158
159
160 /* default maximum number of failures */
161 #define IDE_DEFAULT_MAX_FAILURES 1
162
163 static const u8 ide_hwif_to_major[] = { IDE0_MAJOR, IDE1_MAJOR,
164 IDE2_MAJOR, IDE3_MAJOR,
165 IDE4_MAJOR, IDE5_MAJOR,
166 IDE6_MAJOR, IDE7_MAJOR,
167 IDE8_MAJOR, IDE9_MAJOR };
168
169 static int idebus_parameter; /* holds the "idebus=" parameter */
170 static int system_bus_speed; /* holds what we think is VESA/PCI bus speed */
171 static int initializing; /* set while initializing built-in drivers */
172
173 DECLARE_MUTEX(ide_cfg_sem);
174 __cacheline_aligned_in_smp DEFINE_SPINLOCK(ide_lock);
175
176 #ifdef CONFIG_BLK_DEV_IDEPCI
177 static int ide_scan_direction; /* THIS was formerly 2.2.x pci=reverse */
178 #endif
179
180 int noautodma = 0;
181
182 EXPORT_SYMBOL(noautodma);
183
184 #ifdef CONFIG_BLK_DEV_IDEACPI
185 int ide_noacpi = 0;
186 int ide_noacpitfs = 1;
187 int ide_noacpionboot = 1;
188 #endif
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
220 init_completion(&hwif->gendev_rel_comp);
221
222 default_hwif_iops(hwif);
223 default_hwif_transport(hwif);
224 for (unit = 0; unit < MAX_DRIVES; ++unit) {
225 ide_drive_t *drive = &hwif->drives[unit];
226
227 drive->media = ide_disk;
228 drive->select.all = (unit<<4)|0xa0;
229 drive->hwif = hwif;
230 drive->ctl = 0x08;
231 drive->ready_stat = READY_STAT;
232 drive->bad_wstat = BAD_W_STAT;
233 drive->special.b.recalibrate = 1;
234 drive->special.b.set_geometry = 1;
235 drive->name[0] = 'h';
236 drive->name[1] = 'd';
237 drive->name[2] = 'a' + (index * MAX_DRIVES) + unit;
238 drive->max_failures = IDE_DEFAULT_MAX_FAILURES;
239 drive->using_dma = 0;
240 drive->vdma = 0;
241 INIT_LIST_HEAD(&drive->list);
242 init_completion(&drive->gendev_rel_comp);
243 }
244 }
245
246 static void init_hwif_default(ide_hwif_t *hwif, unsigned int index)
247 {
248 hw_regs_t hw;
249
250 memset(&hw, 0, sizeof(hw_regs_t));
251
252 ide_init_hwif_ports(&hw, ide_default_io_base(index), 0, &hwif->irq);
253
254 memcpy(&hwif->hw, &hw, sizeof(hw));
255 memcpy(hwif->io_ports, hw.io_ports, sizeof(hw.io_ports));
256
257 hwif->noprobe = !hwif->io_ports[IDE_DATA_OFFSET];
258 #ifdef CONFIG_BLK_DEV_HD
259 if (hwif->io_ports[IDE_DATA_OFFSET] == HD_DATA)
260 hwif->noprobe = 1; /* may be overridden by ide_setup() */
261 #endif
262 }
263
264 extern void ide_arm_init(void);
265
266 /*
267 * init_ide_data() sets reasonable default values into all fields
268 * of all instances of the hwifs and drives, but only on the first call.
269 * Subsequent calls have no effect (they don't wipe out anything).
270 *
271 * This routine is normally called at driver initialization time,
272 * but may also be called MUCH earlier during kernel "command-line"
273 * parameter processing. As such, we cannot depend on any other parts
274 * of the kernel (such as memory allocation) to be functioning yet.
275 *
276 * This is too bad, as otherwise we could dynamically allocate the
277 * ide_drive_t structs as needed, rather than always consuming memory
278 * for the max possible number (MAX_HWIFS * MAX_DRIVES) of them.
279 *
280 * FIXME: We should stuff the setup data into __init and copy the
281 * relevant hwifs/allocate them properly during boot.
282 */
283 #define MAGIC_COOKIE 0x12345678
284 static void __init init_ide_data (void)
285 {
286 ide_hwif_t *hwif;
287 unsigned int index;
288 static unsigned long magic_cookie = MAGIC_COOKIE;
289
290 if (magic_cookie != MAGIC_COOKIE)
291 return; /* already initialized */
292 magic_cookie = 0;
293
294 /* Initialise all interface structures */
295 for (index = 0; index < MAX_HWIFS; ++index) {
296 hwif = &ide_hwifs[index];
297 init_hwif_data(hwif, index);
298 init_hwif_default(hwif, index);
299 #if !defined(CONFIG_PPC32) || !defined(CONFIG_PCI)
300 hwif->irq = hwif->hw.irq =
301 ide_init_default_irq(hwif->io_ports[IDE_DATA_OFFSET]);
302 #endif
303 }
304 #ifdef CONFIG_IDE_ARM
305 initializing = 1;
306 ide_arm_init();
307 initializing = 0;
308 #endif
309 }
310
311 /**
312 * ide_system_bus_speed - guess bus speed
313 *
314 * ide_system_bus_speed() returns what we think is the system VESA/PCI
315 * bus speed (in MHz). This is used for calculating interface PIO timings.
316 * The default is 40 for known PCI systems, 50 otherwise.
317 * The "idebus=xx" parameter can be used to override this value.
318 * The actual value to be used is computed/displayed the first time
319 * through. Drivers should only use this as a last resort.
320 *
321 * Returns a guessed speed in MHz.
322 */
323
324 static int ide_system_bus_speed(void)
325 {
326 #ifdef CONFIG_PCI
327 static struct pci_device_id pci_default[] = {
328 { PCI_DEVICE(PCI_ANY_ID, PCI_ANY_ID) },
329 { }
330 };
331 #else
332 #define pci_default 0
333 #endif /* CONFIG_PCI */
334
335 if (!system_bus_speed) {
336 if (idebus_parameter) {
337 /* user supplied value */
338 system_bus_speed = idebus_parameter;
339 } else if (pci_dev_present(pci_default)) {
340 /* safe default value for PCI */
341 system_bus_speed = 33;
342 } else {
343 /* safe default value for VESA and PCI */
344 system_bus_speed = 50;
345 }
346 printk(KERN_INFO "ide: Assuming %dMHz system bus speed "
347 "for PIO modes%s\n", system_bus_speed,
348 idebus_parameter ? "" : "; override with idebus=xx");
349 }
350 return system_bus_speed;
351 }
352
353 #ifdef CONFIG_PROC_FS
354 struct proc_dir_entry *proc_ide_root;
355 #endif
356
357 static struct resource* hwif_request_region(ide_hwif_t *hwif,
358 unsigned long addr, int num)
359 {
360 struct resource *res = request_region(addr, num, hwif->name);
361
362 if (!res)
363 printk(KERN_ERR "%s: I/O resource 0x%lX-0x%lX not free.\n",
364 hwif->name, addr, addr+num-1);
365 return res;
366 }
367
368 /**
369 * ide_hwif_request_regions - request resources for IDE
370 * @hwif: interface to use
371 *
372 * Requests all the needed resources for an interface.
373 * Right now core IDE code does this work which is deeply wrong.
374 * MMIO leaves it to the controller driver,
375 * PIO will migrate this way over time.
376 */
377
378 int ide_hwif_request_regions(ide_hwif_t *hwif)
379 {
380 unsigned long addr;
381 unsigned int i;
382
383 if (hwif->mmio)
384 return 0;
385 addr = hwif->io_ports[IDE_CONTROL_OFFSET];
386 if (addr && !hwif_request_region(hwif, addr, 1))
387 goto control_region_busy;
388 hwif->straight8 = 0;
389 addr = hwif->io_ports[IDE_DATA_OFFSET];
390 if ((addr | 7) == hwif->io_ports[IDE_STATUS_OFFSET]) {
391 if (!hwif_request_region(hwif, addr, 8))
392 goto data_region_busy;
393 hwif->straight8 = 1;
394 return 0;
395 }
396 for (i = IDE_DATA_OFFSET; i <= IDE_STATUS_OFFSET; i++) {
397 addr = hwif->io_ports[i];
398 if (!hwif_request_region(hwif, addr, 1)) {
399 while (--i)
400 release_region(addr, 1);
401 goto data_region_busy;
402 }
403 }
404 return 0;
405
406 data_region_busy:
407 addr = hwif->io_ports[IDE_CONTROL_OFFSET];
408 if (addr)
409 release_region(addr, 1);
410 control_region_busy:
411 /* If any errors are return, we drop the hwif interface. */
412 return -EBUSY;
413 }
414
415 /**
416 * ide_hwif_release_regions - free IDE resources
417 *
418 * Note that we only release the standard ports,
419 * and do not even try to handle any extra ports
420 * allocated for weird IDE interface chipsets.
421 *
422 * Note also that we don't yet handle mmio resources here. More
423 * importantly our caller should be doing this so we need to
424 * restructure this as a helper function for drivers.
425 */
426
427 void ide_hwif_release_regions(ide_hwif_t *hwif)
428 {
429 u32 i = 0;
430
431 if (hwif->mmio)
432 return;
433 if (hwif->io_ports[IDE_CONTROL_OFFSET])
434 release_region(hwif->io_ports[IDE_CONTROL_OFFSET], 1);
435 if (hwif->straight8) {
436 release_region(hwif->io_ports[IDE_DATA_OFFSET], 8);
437 return;
438 }
439 for (i = IDE_DATA_OFFSET; i <= IDE_STATUS_OFFSET; i++)
440 if (hwif->io_ports[i])
441 release_region(hwif->io_ports[i], 1);
442 }
443
444 /**
445 * ide_hwif_restore - restore hwif to template
446 * @hwif: hwif to update
447 * @tmp_hwif: template
448 *
449 * Restore hwif to a previous state by copying most settings
450 * from the template.
451 */
452
453 static void ide_hwif_restore(ide_hwif_t *hwif, ide_hwif_t *tmp_hwif)
454 {
455 hwif->hwgroup = tmp_hwif->hwgroup;
456
457 hwif->gendev.parent = tmp_hwif->gendev.parent;
458
459 hwif->proc = tmp_hwif->proc;
460
461 hwif->major = tmp_hwif->major;
462 hwif->straight8 = tmp_hwif->straight8;
463 hwif->bus_state = tmp_hwif->bus_state;
464
465 hwif->atapi_dma = tmp_hwif->atapi_dma;
466 hwif->ultra_mask = tmp_hwif->ultra_mask;
467 hwif->mwdma_mask = tmp_hwif->mwdma_mask;
468 hwif->swdma_mask = tmp_hwif->swdma_mask;
469
470 hwif->chipset = tmp_hwif->chipset;
471 hwif->hold = tmp_hwif->hold;
472
473 #ifdef CONFIG_BLK_DEV_IDEPCI
474 hwif->pci_dev = tmp_hwif->pci_dev;
475 hwif->cds = tmp_hwif->cds;
476 #endif
477
478 hwif->tuneproc = tmp_hwif->tuneproc;
479 hwif->speedproc = tmp_hwif->speedproc;
480 hwif->selectproc = tmp_hwif->selectproc;
481 hwif->reset_poll = tmp_hwif->reset_poll;
482 hwif->pre_reset = tmp_hwif->pre_reset;
483 hwif->resetproc = tmp_hwif->resetproc;
484 hwif->intrproc = tmp_hwif->intrproc;
485 hwif->maskproc = tmp_hwif->maskproc;
486 hwif->quirkproc = tmp_hwif->quirkproc;
487 hwif->busproc = tmp_hwif->busproc;
488
489 hwif->ata_input_data = tmp_hwif->ata_input_data;
490 hwif->ata_output_data = tmp_hwif->ata_output_data;
491 hwif->atapi_input_bytes = tmp_hwif->atapi_input_bytes;
492 hwif->atapi_output_bytes = tmp_hwif->atapi_output_bytes;
493
494 hwif->dma_setup = tmp_hwif->dma_setup;
495 hwif->dma_exec_cmd = tmp_hwif->dma_exec_cmd;
496 hwif->dma_start = tmp_hwif->dma_start;
497 hwif->ide_dma_end = tmp_hwif->ide_dma_end;
498 hwif->ide_dma_check = tmp_hwif->ide_dma_check;
499 hwif->ide_dma_on = tmp_hwif->ide_dma_on;
500 hwif->dma_off_quietly = tmp_hwif->dma_off_quietly;
501 hwif->ide_dma_test_irq = tmp_hwif->ide_dma_test_irq;
502 hwif->ide_dma_clear_irq = tmp_hwif->ide_dma_clear_irq;
503 hwif->dma_host_on = tmp_hwif->dma_host_on;
504 hwif->dma_host_off = tmp_hwif->dma_host_off;
505 hwif->ide_dma_lostirq = tmp_hwif->ide_dma_lostirq;
506 hwif->ide_dma_timeout = tmp_hwif->ide_dma_timeout;
507
508 hwif->OUTB = tmp_hwif->OUTB;
509 hwif->OUTBSYNC = tmp_hwif->OUTBSYNC;
510 hwif->OUTW = tmp_hwif->OUTW;
511 hwif->OUTSW = tmp_hwif->OUTSW;
512 hwif->OUTSL = tmp_hwif->OUTSL;
513
514 hwif->INB = tmp_hwif->INB;
515 hwif->INW = tmp_hwif->INW;
516 hwif->INSW = tmp_hwif->INSW;
517 hwif->INSL = tmp_hwif->INSL;
518
519 hwif->sg_max_nents = tmp_hwif->sg_max_nents;
520
521 hwif->mmio = tmp_hwif->mmio;
522 hwif->rqsize = tmp_hwif->rqsize;
523 hwif->no_lba48 = tmp_hwif->no_lba48;
524
525 #ifndef CONFIG_BLK_DEV_IDECS
526 hwif->irq = tmp_hwif->irq;
527 #endif
528
529 hwif->dma_base = tmp_hwif->dma_base;
530 hwif->dma_master = tmp_hwif->dma_master;
531 hwif->dma_command = tmp_hwif->dma_command;
532 hwif->dma_vendor1 = tmp_hwif->dma_vendor1;
533 hwif->dma_status = tmp_hwif->dma_status;
534 hwif->dma_vendor3 = tmp_hwif->dma_vendor3;
535 hwif->dma_prdtable = tmp_hwif->dma_prdtable;
536
537 hwif->config_data = tmp_hwif->config_data;
538 hwif->select_data = tmp_hwif->select_data;
539 hwif->extra_base = tmp_hwif->extra_base;
540 hwif->extra_ports = tmp_hwif->extra_ports;
541 hwif->autodma = tmp_hwif->autodma;
542 hwif->udma_four = tmp_hwif->udma_four;
543
544 hwif->hwif_data = tmp_hwif->hwif_data;
545 }
546
547 /**
548 * ide_unregister - free an IDE interface
549 * @index: index of interface (will change soon to a pointer)
550 *
551 * Perform the final unregister of an IDE interface. At the moment
552 * we don't refcount interfaces so this will also get split up.
553 *
554 * Locking:
555 * The caller must not hold the IDE locks
556 * The drive present/vanishing is not yet properly locked
557 * Take care with the callbacks. These have been split to avoid
558 * deadlocking the IDE layer. The shutdown callback is called
559 * before we take the lock and free resources. It is up to the
560 * caller to be sure there is no pending I/O here, and that
561 * the interface will not be reopened (present/vanishing locking
562 * isn't yet done BTW). After we commit to the final kill we
563 * call the cleanup callback with the ide locks held.
564 *
565 * Unregister restores the hwif structures to the default state.
566 * This is raving bonkers.
567 */
568
569 void ide_unregister(unsigned int index)
570 {
571 ide_drive_t *drive;
572 ide_hwif_t *hwif, *g;
573 static ide_hwif_t tmp_hwif; /* protected by ide_cfg_sem */
574 ide_hwgroup_t *hwgroup;
575 int irq_count = 0, unit;
576
577 BUG_ON(index >= MAX_HWIFS);
578
579 BUG_ON(in_interrupt());
580 BUG_ON(irqs_disabled());
581 down(&ide_cfg_sem);
582 spin_lock_irq(&ide_lock);
583 hwif = &ide_hwifs[index];
584 if (!hwif->present)
585 goto abort;
586 for (unit = 0; unit < MAX_DRIVES; ++unit) {
587 drive = &hwif->drives[unit];
588 if (!drive->present)
589 continue;
590 spin_unlock_irq(&ide_lock);
591 device_unregister(&drive->gendev);
592 wait_for_completion(&drive->gendev_rel_comp);
593 spin_lock_irq(&ide_lock);
594 }
595 hwif->present = 0;
596
597 spin_unlock_irq(&ide_lock);
598
599 destroy_proc_ide_interface(hwif);
600
601 hwgroup = hwif->hwgroup;
602 /*
603 * free the irq if we were the only hwif using it
604 */
605 g = hwgroup->hwif;
606 do {
607 if (g->irq == hwif->irq)
608 ++irq_count;
609 g = g->next;
610 } while (g != hwgroup->hwif);
611 if (irq_count == 1)
612 free_irq(hwif->irq, hwgroup);
613
614 spin_lock_irq(&ide_lock);
615 /*
616 * Note that we only release the standard ports,
617 * and do not even try to handle any extra ports
618 * allocated for weird IDE interface chipsets.
619 */
620 ide_hwif_release_regions(hwif);
621
622 /*
623 * Remove us from the hwgroup, and free
624 * the hwgroup if we were the only member
625 */
626 if (hwif->next == hwif) {
627 BUG_ON(hwgroup->hwif != hwif);
628 kfree(hwgroup);
629 } else {
630 /* There is another interface in hwgroup.
631 * Unlink us, and set hwgroup->drive and ->hwif to
632 * something sane.
633 */
634 g = hwgroup->hwif;
635 while (g->next != hwif)
636 g = g->next;
637 g->next = hwif->next;
638 if (hwgroup->hwif == hwif) {
639 /* Chose a random hwif for hwgroup->hwif.
640 * It's guaranteed that there are no drives
641 * left in the hwgroup.
642 */
643 BUG_ON(hwgroup->drive != NULL);
644 hwgroup->hwif = g;
645 }
646 BUG_ON(hwgroup->hwif == hwif);
647 }
648
649 /* More messed up locking ... */
650 spin_unlock_irq(&ide_lock);
651 device_unregister(&hwif->gendev);
652 wait_for_completion(&hwif->gendev_rel_comp);
653
654 /*
655 * Remove us from the kernel's knowledge
656 */
657 blk_unregister_region(MKDEV(hwif->major, 0), MAX_DRIVES<<PARTN_BITS);
658 kfree(hwif->sg_table);
659 unregister_blkdev(hwif->major, hwif->name);
660 spin_lock_irq(&ide_lock);
661
662 if (hwif->dma_base) {
663 (void) ide_release_dma(hwif);
664
665 hwif->dma_base = 0;
666 hwif->dma_master = 0;
667 hwif->dma_command = 0;
668 hwif->dma_vendor1 = 0;
669 hwif->dma_status = 0;
670 hwif->dma_vendor3 = 0;
671 hwif->dma_prdtable = 0;
672
673 hwif->extra_base = 0;
674 hwif->extra_ports = 0;
675 }
676
677 /* copy original settings */
678 tmp_hwif = *hwif;
679
680 /* restore hwif data to pristine status */
681 init_hwif_data(hwif, index);
682 init_hwif_default(hwif, index);
683
684 ide_hwif_restore(hwif, &tmp_hwif);
685
686 abort:
687 spin_unlock_irq(&ide_lock);
688 up(&ide_cfg_sem);
689 }
690
691 EXPORT_SYMBOL(ide_unregister);
692
693
694 /**
695 * ide_setup_ports - set up IDE interface ports
696 * @hw: register descriptions
697 * @base: base register
698 * @offsets: table of register offsets
699 * @ctrl: control register
700 * @ack_irq: IRQ ack
701 * @irq: interrupt lie
702 *
703 * Setup hw_regs_t structure described by parameters. You
704 * may set up the hw structure yourself OR use this routine to
705 * do it for you. This is basically a helper
706 *
707 */
708
709 void ide_setup_ports ( hw_regs_t *hw,
710 unsigned long base, int *offsets,
711 unsigned long ctrl, unsigned long intr,
712 ide_ack_intr_t *ack_intr,
713 /*
714 * ide_io_ops_t *iops,
715 */
716 int irq)
717 {
718 int i;
719
720 memset(hw, 0, sizeof(hw_regs_t));
721 for (i = 0; i < IDE_NR_PORTS; i++) {
722 if (offsets[i] == -1) {
723 switch(i) {
724 case IDE_CONTROL_OFFSET:
725 hw->io_ports[i] = ctrl;
726 break;
727 #if defined(CONFIG_AMIGA) || defined(CONFIG_MAC)
728 case IDE_IRQ_OFFSET:
729 hw->io_ports[i] = intr;
730 break;
731 #endif /* (CONFIG_AMIGA) || (CONFIG_MAC) */
732 default:
733 hw->io_ports[i] = 0;
734 break;
735 }
736 } else {
737 hw->io_ports[i] = base + offsets[i];
738 }
739 }
740 hw->irq = irq;
741 hw->dma = NO_DMA;
742 hw->ack_intr = ack_intr;
743 /*
744 * hw->iops = iops;
745 */
746 }
747
748 /**
749 * ide_register_hw_with_fixup - register IDE interface
750 * @hw: hardware registers
751 * @hwifp: pointer to returned hwif
752 * @fixup: fixup function
753 *
754 * Register an IDE interface, specifying exactly the registers etc.
755 * Set init=1 iff calling before probes have taken place.
756 *
757 * Returns -1 on error.
758 */
759
760 int ide_register_hw_with_fixup(hw_regs_t *hw, ide_hwif_t **hwifp, void(*fixup)(ide_hwif_t *hwif))
761 {
762 int index, retry = 1;
763 ide_hwif_t *hwif;
764
765 do {
766 for (index = 0; index < MAX_HWIFS; ++index) {
767 hwif = &ide_hwifs[index];
768 if (hwif->hw.io_ports[IDE_DATA_OFFSET] == hw->io_ports[IDE_DATA_OFFSET])
769 goto found;
770 }
771 for (index = 0; index < MAX_HWIFS; ++index) {
772 hwif = &ide_hwifs[index];
773 if (hwif->hold)
774 continue;
775 if ((!hwif->present && !hwif->mate && !initializing) ||
776 (!hwif->hw.io_ports[IDE_DATA_OFFSET] && initializing))
777 goto found;
778 }
779 for (index = 0; index < MAX_HWIFS; index++)
780 ide_unregister(index);
781 } while (retry--);
782 return -1;
783 found:
784 if (hwif->present)
785 ide_unregister(index);
786 else if (!hwif->hold) {
787 init_hwif_data(hwif, index);
788 init_hwif_default(hwif, index);
789 }
790 if (hwif->present)
791 return -1;
792 memcpy(&hwif->hw, hw, sizeof(*hw));
793 memcpy(hwif->io_ports, hwif->hw.io_ports, sizeof(hwif->hw.io_ports));
794 hwif->irq = hw->irq;
795 hwif->noprobe = 0;
796 hwif->chipset = hw->chipset;
797 hwif->gendev.parent = hw->dev;
798
799 if (!initializing) {
800 probe_hwif_init_with_fixup(hwif, fixup);
801 create_proc_ide_interfaces();
802 }
803
804 if (hwifp)
805 *hwifp = hwif;
806
807 return (initializing || hwif->present) ? index : -1;
808 }
809
810 EXPORT_SYMBOL(ide_register_hw_with_fixup);
811
812 int ide_register_hw(hw_regs_t *hw, ide_hwif_t **hwifp)
813 {
814 return ide_register_hw_with_fixup(hw, hwifp, NULL);
815 }
816
817 EXPORT_SYMBOL(ide_register_hw);
818
819 /*
820 * Locks for IDE setting functionality
821 */
822
823 DECLARE_MUTEX(ide_setting_sem);
824
825 /**
826 * __ide_add_setting - add an ide setting option
827 * @drive: drive to use
828 * @name: setting name
829 * @rw: true if the function is read write
830 * @read_ioctl: function to call on read
831 * @write_ioctl: function to call on write
832 * @data_type: type of data
833 * @min: range minimum
834 * @max: range maximum
835 * @mul_factor: multiplication scale
836 * @div_factor: divison scale
837 * @data: private data field
838 * @set: setting
839 * @auto_remove: setting auto removal flag
840 *
841 * Removes the setting named from the device if it is present.
842 * The function takes the settings_lock to protect against
843 * parallel changes. This function must not be called from IRQ
844 * context. Returns 0 on success or -1 on failure.
845 *
846 * BUGS: This code is seriously over-engineered. There is also
847 * magic about how the driver specific features are setup. If
848 * a driver is attached we assume the driver settings are auto
849 * remove.
850 */
851
852 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)
853 {
854 ide_settings_t **p = (ide_settings_t **) &drive->settings, *setting = NULL;
855
856 down(&ide_setting_sem);
857 while ((*p) && strcmp((*p)->name, name) < 0)
858 p = &((*p)->next);
859 if ((setting = kzalloc(sizeof(*setting), GFP_KERNEL)) == NULL)
860 goto abort;
861 if ((setting->name = kmalloc(strlen(name) + 1, GFP_KERNEL)) == NULL)
862 goto abort;
863 strcpy(setting->name, name);
864 setting->rw = rw;
865 setting->read_ioctl = read_ioctl;
866 setting->write_ioctl = write_ioctl;
867 setting->data_type = data_type;
868 setting->min = min;
869 setting->max = max;
870 setting->mul_factor = mul_factor;
871 setting->div_factor = div_factor;
872 setting->data = data;
873 setting->set = set;
874
875 setting->next = *p;
876 if (auto_remove)
877 setting->auto_remove = 1;
878 *p = setting;
879 up(&ide_setting_sem);
880 return 0;
881 abort:
882 up(&ide_setting_sem);
883 kfree(setting);
884 return -1;
885 }
886
887 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)
888 {
889 return __ide_add_setting(drive, name, rw, read_ioctl, write_ioctl, data_type, min, max, mul_factor, div_factor, data, set, 1);
890 }
891
892 EXPORT_SYMBOL(ide_add_setting);
893
894 /**
895 * __ide_remove_setting - remove an ide setting option
896 * @drive: drive to use
897 * @name: setting name
898 *
899 * Removes the setting named from the device if it is present.
900 * The caller must hold the setting semaphore.
901 */
902
903 static void __ide_remove_setting (ide_drive_t *drive, char *name)
904 {
905 ide_settings_t **p, *setting;
906
907 p = (ide_settings_t **) &drive->settings;
908
909 while ((*p) && strcmp((*p)->name, name))
910 p = &((*p)->next);
911 if ((setting = (*p)) == NULL)
912 return;
913
914 (*p) = setting->next;
915
916 kfree(setting->name);
917 kfree(setting);
918 }
919
920 /**
921 * ide_find_setting_by_ioctl - find a drive specific ioctl
922 * @drive: drive to scan
923 * @cmd: ioctl command to handle
924 *
925 * Scan's the device setting table for a matching entry and returns
926 * this or NULL if no entry is found. The caller must hold the
927 * setting semaphore
928 */
929
930 static ide_settings_t *ide_find_setting_by_ioctl (ide_drive_t *drive, int cmd)
931 {
932 ide_settings_t *setting = drive->settings;
933
934 while (setting) {
935 if (setting->read_ioctl == cmd || setting->write_ioctl == cmd)
936 break;
937 setting = setting->next;
938 }
939
940 return setting;
941 }
942
943 /**
944 * ide_find_setting_by_name - find a drive specific setting
945 * @drive: drive to scan
946 * @name: setting name
947 *
948 * Scan's the device setting table for a matching entry and returns
949 * this or NULL if no entry is found. The caller must hold the
950 * setting semaphore
951 */
952
953 ide_settings_t *ide_find_setting_by_name (ide_drive_t *drive, char *name)
954 {
955 ide_settings_t *setting = drive->settings;
956
957 while (setting) {
958 if (strcmp(setting->name, name) == 0)
959 break;
960 setting = setting->next;
961 }
962 return setting;
963 }
964
965 /**
966 * auto_remove_settings - remove driver specific settings
967 * @drive: drive
968 *
969 * Automatically remove all the driver specific settings for this
970 * drive. This function may not be called from IRQ context. The
971 * caller must hold ide_setting_sem.
972 */
973
974 static void auto_remove_settings (ide_drive_t *drive)
975 {
976 ide_settings_t *setting;
977 repeat:
978 setting = drive->settings;
979 while (setting) {
980 if (setting->auto_remove) {
981 __ide_remove_setting(drive, setting->name);
982 goto repeat;
983 }
984 setting = setting->next;
985 }
986 }
987
988 /**
989 * ide_read_setting - read an IDE setting
990 * @drive: drive to read from
991 * @setting: drive setting
992 *
993 * Read a drive setting and return the value. The caller
994 * must hold the ide_setting_sem when making this call.
995 *
996 * BUGS: the data return and error are the same return value
997 * so an error -EINVAL and true return of the same value cannot
998 * be told apart
999 */
1000
1001 int ide_read_setting (ide_drive_t *drive, ide_settings_t *setting)
1002 {
1003 int val = -EINVAL;
1004 unsigned long flags;
1005
1006 if ((setting->rw & SETTING_READ)) {
1007 spin_lock_irqsave(&ide_lock, flags);
1008 switch(setting->data_type) {
1009 case TYPE_BYTE:
1010 val = *((u8 *) setting->data);
1011 break;
1012 case TYPE_SHORT:
1013 val = *((u16 *) setting->data);
1014 break;
1015 case TYPE_INT:
1016 case TYPE_INTA:
1017 val = *((u32 *) setting->data);
1018 break;
1019 }
1020 spin_unlock_irqrestore(&ide_lock, flags);
1021 }
1022 return val;
1023 }
1024
1025 /**
1026 * ide_spin_wait_hwgroup - wait for group
1027 * @drive: drive in the group
1028 *
1029 * Wait for an IDE device group to go non busy and then return
1030 * holding the ide_lock which guards the hwgroup->busy status
1031 * and right to use it.
1032 */
1033
1034 int ide_spin_wait_hwgroup (ide_drive_t *drive)
1035 {
1036 ide_hwgroup_t *hwgroup = HWGROUP(drive);
1037 unsigned long timeout = jiffies + (3 * HZ);
1038
1039 spin_lock_irq(&ide_lock);
1040
1041 while (hwgroup->busy) {
1042 unsigned long lflags;
1043 spin_unlock_irq(&ide_lock);
1044 local_irq_set(lflags);
1045 if (time_after(jiffies, timeout)) {
1046 local_irq_restore(lflags);
1047 printk(KERN_ERR "%s: channel busy\n", drive->name);
1048 return -EBUSY;
1049 }
1050 local_irq_restore(lflags);
1051 spin_lock_irq(&ide_lock);
1052 }
1053 return 0;
1054 }
1055
1056 EXPORT_SYMBOL(ide_spin_wait_hwgroup);
1057
1058 /**
1059 * ide_write_setting - read an IDE setting
1060 * @drive: drive to read from
1061 * @setting: drive setting
1062 * @val: value
1063 *
1064 * Write a drive setting if it is possible. The caller
1065 * must hold the ide_setting_sem when making this call.
1066 *
1067 * BUGS: the data return and error are the same return value
1068 * so an error -EINVAL and true return of the same value cannot
1069 * be told apart
1070 *
1071 * FIXME: This should be changed to enqueue a special request
1072 * to the driver to change settings, and then wait on a sema for completion.
1073 * The current scheme of polling is kludgy, though safe enough.
1074 */
1075
1076 int ide_write_setting (ide_drive_t *drive, ide_settings_t *setting, int val)
1077 {
1078 int i;
1079 u32 *p;
1080
1081 if (!capable(CAP_SYS_ADMIN))
1082 return -EACCES;
1083 if (!(setting->rw & SETTING_WRITE))
1084 return -EPERM;
1085 if (val < setting->min || val > setting->max)
1086 return -EINVAL;
1087 if (setting->set)
1088 return setting->set(drive, val);
1089 if (ide_spin_wait_hwgroup(drive))
1090 return -EBUSY;
1091 switch (setting->data_type) {
1092 case TYPE_BYTE:
1093 *((u8 *) setting->data) = val;
1094 break;
1095 case TYPE_SHORT:
1096 *((u16 *) setting->data) = val;
1097 break;
1098 case TYPE_INT:
1099 *((u32 *) setting->data) = val;
1100 break;
1101 case TYPE_INTA:
1102 p = (u32 *) setting->data;
1103 for (i = 0; i < 1 << PARTN_BITS; i++, p++)
1104 *p = val;
1105 break;
1106 }
1107 spin_unlock_irq(&ide_lock);
1108 return 0;
1109 }
1110
1111 static int set_io_32bit(ide_drive_t *drive, int arg)
1112 {
1113 drive->io_32bit = arg;
1114 #ifdef CONFIG_BLK_DEV_DTC2278
1115 if (HWIF(drive)->chipset == ide_dtc2278)
1116 HWIF(drive)->drives[!drive->select.b.unit].io_32bit = arg;
1117 #endif /* CONFIG_BLK_DEV_DTC2278 */
1118 return 0;
1119 }
1120
1121 static int set_using_dma (ide_drive_t *drive, int arg)
1122 {
1123 #ifdef CONFIG_BLK_DEV_IDEDMA
1124 ide_hwif_t *hwif = drive->hwif;
1125 int err = -EPERM;
1126
1127 if (!drive->id || !(drive->id->capability & 1))
1128 goto out;
1129
1130 if (hwif->ide_dma_check == NULL)
1131 goto out;
1132
1133 err = -EBUSY;
1134 if (ide_spin_wait_hwgroup(drive))
1135 goto out;
1136 /*
1137 * set ->busy flag, unlock and let it ride
1138 */
1139 hwif->hwgroup->busy = 1;
1140 spin_unlock_irq(&ide_lock);
1141
1142 err = 0;
1143
1144 if (arg) {
1145 if (ide_set_dma(drive) || hwif->ide_dma_on(drive))
1146 err = -EIO;
1147 } else
1148 ide_dma_off(drive);
1149
1150 /*
1151 * lock, clear ->busy flag and unlock before leaving
1152 */
1153 spin_lock_irq(&ide_lock);
1154 hwif->hwgroup->busy = 0;
1155 spin_unlock_irq(&ide_lock);
1156 out:
1157 return err;
1158 #else
1159 return -EPERM;
1160 #endif
1161 }
1162
1163 static int set_pio_mode (ide_drive_t *drive, int arg)
1164 {
1165 struct request rq;
1166
1167 if (!HWIF(drive)->tuneproc)
1168 return -ENOSYS;
1169 if (drive->special.b.set_tune)
1170 return -EBUSY;
1171 ide_init_drive_cmd(&rq);
1172 drive->tune_req = (u8) arg;
1173 drive->special.b.set_tune = 1;
1174 (void) ide_do_drive_cmd(drive, &rq, ide_wait);
1175 return 0;
1176 }
1177
1178 static int set_xfer_rate (ide_drive_t *drive, int arg)
1179 {
1180 int err = ide_wait_cmd(drive,
1181 WIN_SETFEATURES, (u8) arg,
1182 SETFEATURES_XFER, 0, NULL);
1183
1184 if (!err && arg) {
1185 ide_set_xfer_rate(drive, (u8) arg);
1186 ide_driveid_update(drive);
1187 }
1188 return err;
1189 }
1190
1191 /**
1192 * ide_add_generic_settings - generic ide settings
1193 * @drive: drive being configured
1194 *
1195 * Add the generic parts of the system settings to the /proc files and
1196 * ioctls for this IDE device. The caller must not be holding the
1197 * ide_setting_sem.
1198 */
1199
1200 void ide_add_generic_settings (ide_drive_t *drive)
1201 {
1202 /*
1203 * drive setting name read/write access read ioctl write ioctl data type min max mul_factor div_factor data pointer set function
1204 */
1205 __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);
1206 __ide_add_setting(drive, "keepsettings", SETTING_RW, HDIO_GET_KEEPSETTINGS, HDIO_SET_KEEPSETTINGS, TYPE_BYTE, 0, 1, 1, 1, &drive->keep_settings, NULL, 0);
1207 __ide_add_setting(drive, "nice1", SETTING_RW, -1, -1, TYPE_BYTE, 0, 1, 1, 1, &drive->nice1, NULL, 0);
1208 __ide_add_setting(drive, "pio_mode", SETTING_WRITE, -1, HDIO_SET_PIO_MODE, TYPE_BYTE, 0, 255, 1, 1, NULL, set_pio_mode, 0);
1209 __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);
1210 __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);
1211 __ide_add_setting(drive, "init_speed", SETTING_RW, -1, -1, TYPE_BYTE, 0, 70, 1, 1, &drive->init_speed, NULL, 0);
1212 __ide_add_setting(drive, "current_speed", SETTING_RW, -1, -1, TYPE_BYTE, 0, 70, 1, 1, &drive->current_speed, set_xfer_rate, 0);
1213 __ide_add_setting(drive, "number", SETTING_RW, -1, -1, TYPE_BYTE, 0, 3, 1, 1, &drive->dn, NULL, 0);
1214 }
1215
1216 /**
1217 * system_bus_clock - clock guess
1218 *
1219 * External version of the bus clock guess used by very old IDE drivers
1220 * for things like VLB timings. Should not be used.
1221 */
1222
1223 int system_bus_clock (void)
1224 {
1225 return((int) ((!system_bus_speed) ? ide_system_bus_speed() : system_bus_speed ));
1226 }
1227
1228 EXPORT_SYMBOL(system_bus_clock);
1229
1230 static int generic_ide_suspend(struct device *dev, pm_message_t mesg)
1231 {
1232 ide_drive_t *drive = dev->driver_data;
1233 ide_hwif_t *hwif = HWIF(drive);
1234 struct request rq;
1235 struct request_pm_state rqpm;
1236 ide_task_t args;
1237
1238 /* Call ACPI _GTM only once */
1239 if (!(drive->dn % 2))
1240 ide_acpi_get_timing(hwif);
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_SUSPEND;
1246 rq.special = &args;
1247 rq.data = &rqpm;
1248 rqpm.pm_step = ide_pm_state_start_suspend;
1249 if (mesg.event == PM_EVENT_PRETHAW)
1250 mesg.event = PM_EVENT_FREEZE;
1251 rqpm.pm_state = mesg.event;
1252
1253 return ide_do_drive_cmd(drive, &rq, ide_wait);
1254 }
1255
1256 static int generic_ide_resume(struct device *dev)
1257 {
1258 ide_drive_t *drive = dev->driver_data;
1259 ide_hwif_t *hwif = HWIF(drive);
1260 struct request rq;
1261 struct request_pm_state rqpm;
1262 ide_task_t args;
1263
1264 /* Call ACPI _STM only once */
1265 if (!(drive->dn % 2))
1266 ide_acpi_push_timing(hwif);
1267
1268 ide_acpi_exec_tfs(drive);
1269
1270 memset(&rq, 0, sizeof(rq));
1271 memset(&rqpm, 0, sizeof(rqpm));
1272 memset(&args, 0, sizeof(args));
1273 rq.cmd_type = REQ_TYPE_PM_RESUME;
1274 rq.special = &args;
1275 rq.data = &rqpm;
1276 rqpm.pm_step = ide_pm_state_start_resume;
1277 rqpm.pm_state = PM_EVENT_ON;
1278
1279 return ide_do_drive_cmd(drive, &rq, ide_head_wait);
1280 }
1281
1282 int generic_ide_ioctl(ide_drive_t *drive, struct file *file, struct block_device *bdev,
1283 unsigned int cmd, unsigned long arg)
1284 {
1285 ide_settings_t *setting;
1286 ide_driver_t *drv;
1287 int err = 0;
1288 void __user *p = (void __user *)arg;
1289
1290 down(&ide_setting_sem);
1291 if ((setting = ide_find_setting_by_ioctl(drive, cmd)) != NULL) {
1292 if (cmd == setting->read_ioctl) {
1293 err = ide_read_setting(drive, setting);
1294 up(&ide_setting_sem);
1295 return err >= 0 ? put_user(err, (long __user *)arg) : err;
1296 } else {
1297 if (bdev != bdev->bd_contains)
1298 err = -EINVAL;
1299 else
1300 err = ide_write_setting(drive, setting, arg);
1301 up(&ide_setting_sem);
1302 return err;
1303 }
1304 }
1305 up(&ide_setting_sem);
1306
1307 switch (cmd) {
1308 case HDIO_OBSOLETE_IDENTITY:
1309 case HDIO_GET_IDENTITY:
1310 if (bdev != bdev->bd_contains)
1311 return -EINVAL;
1312 if (drive->id_read == 0)
1313 return -ENOMSG;
1314 if (copy_to_user(p, drive->id, (cmd == HDIO_GET_IDENTITY) ? sizeof(*drive->id) : 142))
1315 return -EFAULT;
1316 return 0;
1317
1318 case HDIO_GET_NICE:
1319 return put_user(drive->dsc_overlap << IDE_NICE_DSC_OVERLAP |
1320 drive->atapi_overlap << IDE_NICE_ATAPI_OVERLAP |
1321 drive->nice0 << IDE_NICE_0 |
1322 drive->nice1 << IDE_NICE_1 |
1323 drive->nice2 << IDE_NICE_2,
1324 (long __user *) arg);
1325
1326 #ifdef CONFIG_IDE_TASK_IOCTL
1327 case HDIO_DRIVE_TASKFILE:
1328 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
1329 return -EACCES;
1330 switch(drive->media) {
1331 case ide_disk:
1332 return ide_taskfile_ioctl(drive, cmd, arg);
1333 default:
1334 return -ENOMSG;
1335 }
1336 #endif /* CONFIG_IDE_TASK_IOCTL */
1337
1338 case HDIO_DRIVE_CMD:
1339 if (!capable(CAP_SYS_RAWIO))
1340 return -EACCES;
1341 return ide_cmd_ioctl(drive, cmd, arg);
1342
1343 case HDIO_DRIVE_TASK:
1344 if (!capable(CAP_SYS_RAWIO))
1345 return -EACCES;
1346 return ide_task_ioctl(drive, cmd, arg);
1347
1348 case HDIO_SCAN_HWIF:
1349 {
1350 hw_regs_t hw;
1351 int args[3];
1352 if (!capable(CAP_SYS_RAWIO)) return -EACCES;
1353 if (copy_from_user(args, p, 3 * sizeof(int)))
1354 return -EFAULT;
1355 memset(&hw, 0, sizeof(hw));
1356 ide_init_hwif_ports(&hw, (unsigned long) args[0],
1357 (unsigned long) args[1], NULL);
1358 hw.irq = args[2];
1359 if (ide_register_hw(&hw, NULL) == -1)
1360 return -EIO;
1361 return 0;
1362 }
1363 case HDIO_UNREGISTER_HWIF:
1364 if (!capable(CAP_SYS_RAWIO)) return -EACCES;
1365 /* (arg > MAX_HWIFS) checked in function */
1366 ide_unregister(arg);
1367 return 0;
1368 case HDIO_SET_NICE:
1369 if (!capable(CAP_SYS_ADMIN)) return -EACCES;
1370 if (arg != (arg & ((1 << IDE_NICE_DSC_OVERLAP) | (1 << IDE_NICE_1))))
1371 return -EPERM;
1372 drive->dsc_overlap = (arg >> IDE_NICE_DSC_OVERLAP) & 1;
1373 drv = *(ide_driver_t **)bdev->bd_disk->private_data;
1374 if (drive->dsc_overlap && !drv->supports_dsc_overlap) {
1375 drive->dsc_overlap = 0;
1376 return -EPERM;
1377 }
1378 drive->nice1 = (arg >> IDE_NICE_1) & 1;
1379 return 0;
1380 case HDIO_DRIVE_RESET:
1381 {
1382 unsigned long flags;
1383 if (!capable(CAP_SYS_ADMIN)) return -EACCES;
1384
1385 /*
1386 * Abort the current command on the
1387 * group if there is one, taking
1388 * care not to allow anything else
1389 * to be queued and to die on the
1390 * spot if we miss one somehow
1391 */
1392
1393 spin_lock_irqsave(&ide_lock, flags);
1394
1395 if (HWGROUP(drive)->resetting) {
1396 spin_unlock_irqrestore(&ide_lock, flags);
1397 return -EBUSY;
1398 }
1399
1400 ide_abort(drive, "drive reset");
1401
1402 BUG_ON(HWGROUP(drive)->handler);
1403
1404 /* Ensure nothing gets queued after we
1405 drop the lock. Reset will clear the busy */
1406
1407 HWGROUP(drive)->busy = 1;
1408 spin_unlock_irqrestore(&ide_lock, flags);
1409 (void) ide_do_reset(drive);
1410
1411 return 0;
1412 }
1413
1414 case CDROMEJECT:
1415 case CDROMCLOSETRAY:
1416 return scsi_cmd_ioctl(file, bdev->bd_disk, cmd, p);
1417
1418 case HDIO_GET_BUSSTATE:
1419 if (!capable(CAP_SYS_ADMIN))
1420 return -EACCES;
1421 if (put_user(HWIF(drive)->bus_state, (long __user *)arg))
1422 return -EFAULT;
1423 return 0;
1424
1425 case HDIO_SET_BUSSTATE:
1426 if (!capable(CAP_SYS_ADMIN))
1427 return -EACCES;
1428 if (HWIF(drive)->busproc)
1429 return HWIF(drive)->busproc(drive, (int)arg);
1430 return -EOPNOTSUPP;
1431 default:
1432 return -EINVAL;
1433 }
1434 }
1435
1436 EXPORT_SYMBOL(generic_ide_ioctl);
1437
1438 /*
1439 * stridx() returns the offset of c within s,
1440 * or -1 if c is '\0' or not found within s.
1441 */
1442 static int __init stridx (const char *s, char c)
1443 {
1444 char *i = strchr(s, c);
1445 return (i && c) ? i - s : -1;
1446 }
1447
1448 /*
1449 * match_parm() does parsing for ide_setup():
1450 *
1451 * 1. the first char of s must be '='.
1452 * 2. if the remainder matches one of the supplied keywords,
1453 * the index (1 based) of the keyword is negated and returned.
1454 * 3. if the remainder is a series of no more than max_vals numbers
1455 * separated by commas, the numbers are saved in vals[] and a
1456 * count of how many were saved is returned. Base10 is assumed,
1457 * and base16 is allowed when prefixed with "0x".
1458 * 4. otherwise, zero is returned.
1459 */
1460 static int __init match_parm (char *s, const char *keywords[], int vals[], int max_vals)
1461 {
1462 static const char *decimal = "0123456789";
1463 static const char *hex = "0123456789abcdef";
1464 int i, n;
1465
1466 if (*s++ == '=') {
1467 /*
1468 * Try matching against the supplied keywords,
1469 * and return -(index+1) if we match one
1470 */
1471 if (keywords != NULL) {
1472 for (i = 0; *keywords != NULL; ++i) {
1473 if (!strcmp(s, *keywords++))
1474 return -(i+1);
1475 }
1476 }
1477 /*
1478 * Look for a series of no more than "max_vals"
1479 * numeric values separated by commas, in base10,
1480 * or base16 when prefixed with "0x".
1481 * Return a count of how many were found.
1482 */
1483 for (n = 0; (i = stridx(decimal, *s)) >= 0;) {
1484 vals[n] = i;
1485 while ((i = stridx(decimal, *++s)) >= 0)
1486 vals[n] = (vals[n] * 10) + i;
1487 if (*s == 'x' && !vals[n]) {
1488 while ((i = stridx(hex, *++s)) >= 0)
1489 vals[n] = (vals[n] * 0x10) + i;
1490 }
1491 if (++n == max_vals)
1492 break;
1493 if (*s == ',' || *s == ';')
1494 ++s;
1495 }
1496 if (!*s)
1497 return n;
1498 }
1499 return 0; /* zero = nothing matched */
1500 }
1501
1502 #ifdef CONFIG_BLK_DEV_ALI14XX
1503 extern int probe_ali14xx;
1504 extern int ali14xx_init(void);
1505 #endif
1506 #ifdef CONFIG_BLK_DEV_UMC8672
1507 extern int probe_umc8672;
1508 extern int umc8672_init(void);
1509 #endif
1510 #ifdef CONFIG_BLK_DEV_DTC2278
1511 extern int probe_dtc2278;
1512 extern int dtc2278_init(void);
1513 #endif
1514 #ifdef CONFIG_BLK_DEV_HT6560B
1515 extern int probe_ht6560b;
1516 extern int ht6560b_init(void);
1517 #endif
1518 #ifdef CONFIG_BLK_DEV_QD65XX
1519 extern int probe_qd65xx;
1520 extern int qd65xx_init(void);
1521 #endif
1522
1523 static int __initdata is_chipset_set[MAX_HWIFS];
1524
1525 /*
1526 * ide_setup() gets called VERY EARLY during initialization,
1527 * to handle kernel "command line" strings beginning with "hdx=" or "ide".
1528 *
1529 * Remember to update Documentation/ide.txt if you change something here.
1530 */
1531 static int __init ide_setup(char *s)
1532 {
1533 int i, vals[3];
1534 ide_hwif_t *hwif;
1535 ide_drive_t *drive;
1536 unsigned int hw, unit;
1537 const char max_drive = 'a' + ((MAX_HWIFS * MAX_DRIVES) - 1);
1538 const char max_hwif = '0' + (MAX_HWIFS - 1);
1539
1540
1541 if (strncmp(s,"hd",2) == 0 && s[2] == '=') /* hd= is for hd.c */
1542 return 0; /* driver and not us */
1543
1544 if (strncmp(s,"ide",3) && strncmp(s,"idebus",6) && strncmp(s,"hd",2))
1545 return 0;
1546
1547 printk(KERN_INFO "ide_setup: %s", s);
1548 init_ide_data ();
1549
1550 #ifdef CONFIG_BLK_DEV_IDEDOUBLER
1551 if (!strcmp(s, "ide=doubler")) {
1552 extern int ide_doubler;
1553
1554 printk(" : Enabled support for IDE doublers\n");
1555 ide_doubler = 1;
1556 return 1;
1557 }
1558 #endif /* CONFIG_BLK_DEV_IDEDOUBLER */
1559
1560 if (!strcmp(s, "ide=nodma")) {
1561 printk(" : Prevented DMA\n");
1562 noautodma = 1;
1563 return 1;
1564 }
1565
1566 #ifdef CONFIG_BLK_DEV_IDEPCI
1567 if (!strcmp(s, "ide=reverse")) {
1568 ide_scan_direction = 1;
1569 printk(" : Enabled support for IDE inverse scan order.\n");
1570 return 1;
1571 }
1572 #endif /* CONFIG_BLK_DEV_IDEPCI */
1573
1574 #ifdef CONFIG_BLK_DEV_IDEACPI
1575 if (!strcmp(s, "ide=noacpi")) {
1576 //printk(" : Disable IDE ACPI support.\n");
1577 ide_noacpi = 1;
1578 return 1;
1579 }
1580 if (!strcmp(s, "ide=acpigtf")) {
1581 //printk(" : Enable IDE ACPI _GTF support.\n");
1582 ide_noacpitfs = 0;
1583 return 1;
1584 }
1585 if (!strcmp(s, "ide=acpionboot")) {
1586 //printk(" : Call IDE ACPI methods on boot.\n");
1587 ide_noacpionboot = 0;
1588 return 1;
1589 }
1590 #endif /* CONFIG_BLK_DEV_IDEACPI */
1591
1592 /*
1593 * Look for drive options: "hdx="
1594 */
1595 if (s[0] == 'h' && s[1] == 'd' && s[2] >= 'a' && s[2] <= max_drive) {
1596 const char *hd_words[] = {
1597 "none", "noprobe", "nowerr", "cdrom", "minus5",
1598 "autotune", "noautotune", "minus8", "swapdata", "bswap",
1599 "noflush", "remap", "remap63", "scsi", NULL };
1600 unit = s[2] - 'a';
1601 hw = unit / MAX_DRIVES;
1602 unit = unit % MAX_DRIVES;
1603 hwif = &ide_hwifs[hw];
1604 drive = &hwif->drives[unit];
1605 if (strncmp(s + 4, "ide-", 4) == 0) {
1606 strlcpy(drive->driver_req, s + 4, sizeof(drive->driver_req));
1607 goto done;
1608 }
1609 switch (match_parm(&s[3], hd_words, vals, 3)) {
1610 case -1: /* "none" */
1611 case -2: /* "noprobe" */
1612 drive->noprobe = 1;
1613 goto done;
1614 case -3: /* "nowerr" */
1615 drive->bad_wstat = BAD_R_STAT;
1616 hwif->noprobe = 0;
1617 goto done;
1618 case -4: /* "cdrom" */
1619 drive->present = 1;
1620 drive->media = ide_cdrom;
1621 /* an ATAPI device ignores DRDY */
1622 drive->ready_stat = 0;
1623 hwif->noprobe = 0;
1624 goto done;
1625 case -6: /* "autotune" */
1626 drive->autotune = IDE_TUNE_AUTO;
1627 goto obsolete_option;
1628 case -7: /* "noautotune" */
1629 drive->autotune = IDE_TUNE_NOAUTO;
1630 goto obsolete_option;
1631 case -9: /* "swapdata" */
1632 case -10: /* "bswap" */
1633 drive->bswap = 1;
1634 goto done;
1635 case -11: /* noflush */
1636 drive->noflush = 1;
1637 goto done;
1638 case -12: /* "remap" */
1639 drive->remap_0_to_1 = 1;
1640 goto done;
1641 case -13: /* "remap63" */
1642 drive->sect0 = 63;
1643 goto done;
1644 case -14: /* "scsi" */
1645 drive->scsi = 1;
1646 goto done;
1647 case 3: /* cyl,head,sect */
1648 drive->media = ide_disk;
1649 drive->ready_stat = READY_STAT;
1650 drive->cyl = drive->bios_cyl = vals[0];
1651 drive->head = drive->bios_head = vals[1];
1652 drive->sect = drive->bios_sect = vals[2];
1653 drive->present = 1;
1654 drive->forced_geom = 1;
1655 hwif->noprobe = 0;
1656 goto done;
1657 default:
1658 goto bad_option;
1659 }
1660 }
1661
1662 if (s[0] != 'i' || s[1] != 'd' || s[2] != 'e')
1663 goto bad_option;
1664 /*
1665 * Look for bus speed option: "idebus="
1666 */
1667 if (s[3] == 'b' && s[4] == 'u' && s[5] == 's') {
1668 if (match_parm(&s[6], NULL, vals, 1) != 1)
1669 goto bad_option;
1670 if (vals[0] >= 20 && vals[0] <= 66) {
1671 idebus_parameter = vals[0];
1672 } else
1673 printk(" -- BAD BUS SPEED! Expected value from 20 to 66");
1674 goto done;
1675 }
1676 /*
1677 * Look for interface options: "idex="
1678 */
1679 if (s[3] >= '0' && s[3] <= max_hwif) {
1680 /*
1681 * Be VERY CAREFUL changing this: note hardcoded indexes below
1682 * (-8, -9, -10) are reserved to ease the hardcoding.
1683 */
1684 static const char *ide_words[] = {
1685 "noprobe", "serialize", "minus3", "minus4",
1686 "reset", "dma", "ata66", "minus8", "minus9",
1687 "minus10", "four", "qd65xx", "ht6560b", "cmd640_vlb",
1688 "dtc2278", "umc8672", "ali14xx", NULL };
1689 hw = s[3] - '0';
1690 hwif = &ide_hwifs[hw];
1691 i = match_parm(&s[4], ide_words, vals, 3);
1692
1693 /*
1694 * Cryptic check to ensure chipset not already set for hwif.
1695 * Note: we can't depend on hwif->chipset here.
1696 */
1697 if ((i >= -18 && i <= -11) || (i > 0 && i <= 3)) {
1698 /* chipset already specified */
1699 if (is_chipset_set[hw])
1700 goto bad_option;
1701 if (i > -18 && i <= -11) {
1702 /* these drivers are for "ide0=" only */
1703 if (hw != 0)
1704 goto bad_hwif;
1705 /* chipset already specified for 2nd port */
1706 if (is_chipset_set[hw+1])
1707 goto bad_option;
1708 }
1709 is_chipset_set[hw] = 1;
1710 printk("\n");
1711 }
1712
1713 switch (i) {
1714 #ifdef CONFIG_BLK_DEV_ALI14XX
1715 case -17: /* "ali14xx" */
1716 probe_ali14xx = 1;
1717 goto done;
1718 #endif
1719 #ifdef CONFIG_BLK_DEV_UMC8672
1720 case -16: /* "umc8672" */
1721 probe_umc8672 = 1;
1722 goto done;
1723 #endif
1724 #ifdef CONFIG_BLK_DEV_DTC2278
1725 case -15: /* "dtc2278" */
1726 probe_dtc2278 = 1;
1727 goto done;
1728 #endif
1729 #ifdef CONFIG_BLK_DEV_CMD640
1730 case -14: /* "cmd640_vlb" */
1731 {
1732 extern int cmd640_vlb; /* flag for cmd640.c */
1733 cmd640_vlb = 1;
1734 goto done;
1735 }
1736 #endif
1737 #ifdef CONFIG_BLK_DEV_HT6560B
1738 case -13: /* "ht6560b" */
1739 probe_ht6560b = 1;
1740 goto done;
1741 #endif
1742 #ifdef CONFIG_BLK_DEV_QD65XX
1743 case -12: /* "qd65xx" */
1744 probe_qd65xx = 1;
1745 goto done;
1746 #endif
1747 #ifdef CONFIG_BLK_DEV_4DRIVES
1748 case -11: /* "four" drives on one set of ports */
1749 {
1750 ide_hwif_t *mate = &ide_hwifs[hw^1];
1751 mate->drives[0].select.all ^= 0x20;
1752 mate->drives[1].select.all ^= 0x20;
1753 hwif->chipset = mate->chipset = ide_4drives;
1754 mate->irq = hwif->irq;
1755 memcpy(mate->io_ports, hwif->io_ports, sizeof(hwif->io_ports));
1756 hwif->mate = mate;
1757 mate->mate = hwif;
1758 hwif->serialized = mate->serialized = 1;
1759 goto obsolete_option;
1760 }
1761 #endif /* CONFIG_BLK_DEV_4DRIVES */
1762 case -10: /* minus10 */
1763 case -9: /* minus9 */
1764 case -8: /* minus8 */
1765 case -4:
1766 case -3:
1767 goto bad_option;
1768 case -7: /* ata66 */
1769 #ifdef CONFIG_BLK_DEV_IDEPCI
1770 hwif->udma_four = 1;
1771 goto obsolete_option;
1772 #else
1773 goto bad_hwif;
1774 #endif
1775 case -6: /* dma */
1776 hwif->autodma = 1;
1777 goto obsolete_option;
1778 case -5: /* "reset" */
1779 hwif->reset = 1;
1780 goto obsolete_option;
1781 case -2: /* "serialize" */
1782 hwif->mate = &ide_hwifs[hw^1];
1783 hwif->mate->mate = hwif;
1784 hwif->serialized = hwif->mate->serialized = 1;
1785 goto obsolete_option;
1786
1787 case -1: /* "noprobe" */
1788 hwif->noprobe = 1;
1789 goto done;
1790
1791 case 1: /* base */
1792 vals[1] = vals[0] + 0x206; /* default ctl */
1793 case 2: /* base,ctl */
1794 vals[2] = 0; /* default irq = probe for it */
1795 case 3: /* base,ctl,irq */
1796 hwif->hw.irq = vals[2];
1797 ide_init_hwif_ports(&hwif->hw, (unsigned long) vals[0], (unsigned long) vals[1], &hwif->irq);
1798 memcpy(hwif->io_ports, hwif->hw.io_ports, sizeof(hwif->io_ports));
1799 hwif->irq = vals[2];
1800 hwif->noprobe = 0;
1801 hwif->chipset = ide_forced;
1802 goto obsolete_option;
1803
1804 case 0: goto bad_option;
1805 default:
1806 printk(" -- SUPPORT NOT CONFIGURED IN THIS KERNEL\n");
1807 return 1;
1808 }
1809 }
1810 bad_option:
1811 printk(" -- BAD OPTION\n");
1812 return 1;
1813 obsolete_option:
1814 printk(" -- OBSOLETE OPTION, WILL BE REMOVED SOON!\n");
1815 return 1;
1816 bad_hwif:
1817 printk("-- NOT SUPPORTED ON ide%d", hw);
1818 done:
1819 printk("\n");
1820 return 1;
1821 }
1822
1823 extern void __init pnpide_init(void);
1824 extern void __exit pnpide_exit(void);
1825 extern void __init h8300_ide_init(void);
1826
1827 /*
1828 * probe_for_hwifs() finds/initializes "known" IDE interfaces
1829 */
1830 static void __init probe_for_hwifs (void)
1831 {
1832 #ifdef CONFIG_BLK_DEV_IDEPCI
1833 ide_scan_pcibus(ide_scan_direction);
1834 #endif /* CONFIG_BLK_DEV_IDEPCI */
1835
1836 #ifdef CONFIG_ETRAX_IDE
1837 {
1838 extern void init_e100_ide(void);
1839 init_e100_ide();
1840 }
1841 #endif /* CONFIG_ETRAX_IDE */
1842 #ifdef CONFIG_BLK_DEV_CMD640
1843 {
1844 extern void ide_probe_for_cmd640x(void);
1845 ide_probe_for_cmd640x();
1846 }
1847 #endif /* CONFIG_BLK_DEV_CMD640 */
1848 #ifdef CONFIG_BLK_DEV_IDE_PMAC
1849 {
1850 extern int pmac_ide_probe(void);
1851 (void)pmac_ide_probe();
1852 }
1853 #endif /* CONFIG_BLK_DEV_IDE_PMAC */
1854 #ifdef CONFIG_BLK_DEV_GAYLE
1855 {
1856 extern void gayle_init(void);
1857 gayle_init();
1858 }
1859 #endif /* CONFIG_BLK_DEV_GAYLE */
1860 #ifdef CONFIG_BLK_DEV_FALCON_IDE
1861 {
1862 extern void falconide_init(void);
1863 falconide_init();
1864 }
1865 #endif /* CONFIG_BLK_DEV_FALCON_IDE */
1866 #ifdef CONFIG_BLK_DEV_MAC_IDE
1867 {
1868 extern void macide_init(void);
1869 macide_init();
1870 }
1871 #endif /* CONFIG_BLK_DEV_MAC_IDE */
1872 #ifdef CONFIG_BLK_DEV_Q40IDE
1873 {
1874 extern void q40ide_init(void);
1875 q40ide_init();
1876 }
1877 #endif /* CONFIG_BLK_DEV_Q40IDE */
1878 #ifdef CONFIG_BLK_DEV_BUDDHA
1879 {
1880 extern void buddha_init(void);
1881 buddha_init();
1882 }
1883 #endif /* CONFIG_BLK_DEV_BUDDHA */
1884 #ifdef CONFIG_BLK_DEV_IDEPNP
1885 pnpide_init();
1886 #endif
1887 #ifdef CONFIG_H8300
1888 h8300_ide_init();
1889 #endif
1890 }
1891
1892 void ide_register_subdriver(ide_drive_t *drive, ide_driver_t *driver)
1893 {
1894 #ifdef CONFIG_PROC_FS
1895 ide_add_proc_entries(drive->proc, driver->proc, drive);
1896 #endif
1897 }
1898
1899 EXPORT_SYMBOL(ide_register_subdriver);
1900
1901 /**
1902 * ide_unregister_subdriver - disconnect drive from driver
1903 * @drive: drive to unplug
1904 * @driver: driver
1905 *
1906 * Disconnect a drive from the driver it was attached to and then
1907 * clean up the various proc files and other objects attached to it.
1908 *
1909 * Takes ide_setting_sem and ide_lock.
1910 * Caller must hold none of the locks.
1911 */
1912
1913 void ide_unregister_subdriver(ide_drive_t *drive, ide_driver_t *driver)
1914 {
1915 unsigned long flags;
1916
1917 #ifdef CONFIG_PROC_FS
1918 ide_remove_proc_entries(drive->proc, driver->proc);
1919 #endif
1920 down(&ide_setting_sem);
1921 spin_lock_irqsave(&ide_lock, flags);
1922 /*
1923 * ide_setting_sem protects the settings list
1924 * ide_lock protects the use of settings
1925 *
1926 * so we need to hold both, ide_settings_sem because we want to
1927 * modify the settings list, and ide_lock because we cannot take
1928 * a setting out that is being used.
1929 *
1930 * OTOH both ide_{read,write}_setting are only ever used under
1931 * ide_setting_sem.
1932 */
1933 auto_remove_settings(drive);
1934 spin_unlock_irqrestore(&ide_lock, flags);
1935 up(&ide_setting_sem);
1936 }
1937
1938 EXPORT_SYMBOL(ide_unregister_subdriver);
1939
1940 /*
1941 * Probe module
1942 */
1943
1944 EXPORT_SYMBOL(ide_lock);
1945
1946 static int ide_bus_match(struct device *dev, struct device_driver *drv)
1947 {
1948 return 1;
1949 }
1950
1951 static char *media_string(ide_drive_t *drive)
1952 {
1953 switch (drive->media) {
1954 case ide_disk:
1955 return "disk";
1956 case ide_cdrom:
1957 return "cdrom";
1958 case ide_tape:
1959 return "tape";
1960 case ide_floppy:
1961 return "floppy";
1962 case ide_optical:
1963 return "optical";
1964 default:
1965 return "UNKNOWN";
1966 }
1967 }
1968
1969 static ssize_t media_show(struct device *dev, struct device_attribute *attr, char *buf)
1970 {
1971 ide_drive_t *drive = to_ide_device(dev);
1972 return sprintf(buf, "%s\n", media_string(drive));
1973 }
1974
1975 static ssize_t drivename_show(struct device *dev, struct device_attribute *attr, char *buf)
1976 {
1977 ide_drive_t *drive = to_ide_device(dev);
1978 return sprintf(buf, "%s\n", drive->name);
1979 }
1980
1981 static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf)
1982 {
1983 ide_drive_t *drive = to_ide_device(dev);
1984 return sprintf(buf, "ide:m-%s\n", media_string(drive));
1985 }
1986
1987 static struct device_attribute ide_dev_attrs[] = {
1988 __ATTR_RO(media),
1989 __ATTR_RO(drivename),
1990 __ATTR_RO(modalias),
1991 __ATTR_NULL
1992 };
1993
1994 static int ide_uevent(struct device *dev, char **envp, int num_envp,
1995 char *buffer, int buffer_size)
1996 {
1997 ide_drive_t *drive = to_ide_device(dev);
1998 int i = 0;
1999 int length = 0;
2000
2001 add_uevent_var(envp, num_envp, &i, buffer, buffer_size, &length,
2002 "MEDIA=%s", media_string(drive));
2003 add_uevent_var(envp, num_envp, &i, buffer, buffer_size, &length,
2004 "DRIVENAME=%s", drive->name);
2005 add_uevent_var(envp, num_envp, &i, buffer, buffer_size, &length,
2006 "MODALIAS=ide:m-%s", media_string(drive));
2007 envp[i] = NULL;
2008 return 0;
2009 }
2010
2011 static int generic_ide_probe(struct device *dev)
2012 {
2013 ide_drive_t *drive = to_ide_device(dev);
2014 ide_driver_t *drv = to_ide_driver(dev->driver);
2015
2016 return drv->probe ? drv->probe(drive) : -ENODEV;
2017 }
2018
2019 static int generic_ide_remove(struct device *dev)
2020 {
2021 ide_drive_t *drive = to_ide_device(dev);
2022 ide_driver_t *drv = to_ide_driver(dev->driver);
2023
2024 if (drv->remove)
2025 drv->remove(drive);
2026
2027 return 0;
2028 }
2029
2030 static void generic_ide_shutdown(struct device *dev)
2031 {
2032 ide_drive_t *drive = to_ide_device(dev);
2033 ide_driver_t *drv = to_ide_driver(dev->driver);
2034
2035 if (dev->driver && drv->shutdown)
2036 drv->shutdown(drive);
2037 }
2038
2039 struct bus_type ide_bus_type = {
2040 .name = "ide",
2041 .match = ide_bus_match,
2042 .uevent = ide_uevent,
2043 .probe = generic_ide_probe,
2044 .remove = generic_ide_remove,
2045 .shutdown = generic_ide_shutdown,
2046 .dev_attrs = ide_dev_attrs,
2047 .suspend = generic_ide_suspend,
2048 .resume = generic_ide_resume,
2049 };
2050
2051 EXPORT_SYMBOL_GPL(ide_bus_type);
2052
2053 /*
2054 * This is gets invoked once during initialization, to set *everything* up
2055 */
2056 static int __init ide_init(void)
2057 {
2058 int ret;
2059
2060 printk(KERN_INFO "Uniform Multi-Platform E-IDE driver " REVISION "\n");
2061 system_bus_speed = ide_system_bus_speed();
2062
2063 ret = bus_register(&ide_bus_type);
2064 if (ret < 0) {
2065 printk(KERN_WARNING "IDE: bus_register error: %d\n", ret);
2066 return ret;
2067 }
2068
2069 init_ide_data();
2070
2071 #ifdef CONFIG_PROC_FS
2072 proc_ide_root = proc_mkdir("ide", NULL);
2073 #endif
2074
2075 #ifdef CONFIG_BLK_DEV_ALI14XX
2076 if (probe_ali14xx)
2077 (void)ali14xx_init();
2078 #endif
2079 #ifdef CONFIG_BLK_DEV_UMC8672
2080 if (probe_umc8672)
2081 (void)umc8672_init();
2082 #endif
2083 #ifdef CONFIG_BLK_DEV_DTC2278
2084 if (probe_dtc2278)
2085 (void)dtc2278_init();
2086 #endif
2087 #ifdef CONFIG_BLK_DEV_HT6560B
2088 if (probe_ht6560b)
2089 (void)ht6560b_init();
2090 #endif
2091 #ifdef CONFIG_BLK_DEV_QD65XX
2092 if (probe_qd65xx)
2093 (void)qd65xx_init();
2094 #endif
2095
2096 initializing = 1;
2097 /* Probe for special PCI and other "known" interface chipsets. */
2098 probe_for_hwifs();
2099 initializing = 0;
2100
2101 #ifdef CONFIG_PROC_FS
2102 proc_ide_create();
2103 #endif
2104 return 0;
2105 }
2106
2107 #ifdef MODULE
2108 static char *options = NULL;
2109 module_param(options, charp, 0);
2110 MODULE_LICENSE("GPL");
2111
2112 static void __init parse_options (char *line)
2113 {
2114 char *next = line;
2115
2116 if (line == NULL || !*line)
2117 return;
2118 while ((line = next) != NULL) {
2119 if ((next = strchr(line,' ')) != NULL)
2120 *next++ = 0;
2121 if (!ide_setup(line))
2122 printk (KERN_INFO "Unknown option '%s'\n", line);
2123 }
2124 }
2125
2126 int __init init_module (void)
2127 {
2128 parse_options(options);
2129 return ide_init();
2130 }
2131
2132 void __exit cleanup_module (void)
2133 {
2134 int index;
2135
2136 for (index = 0; index < MAX_HWIFS; ++index)
2137 ide_unregister(index);
2138
2139 #ifdef CONFIG_BLK_DEV_IDEPNP
2140 pnpide_exit();
2141 #endif
2142
2143 #ifdef CONFIG_PROC_FS
2144 proc_ide_destroy();
2145 #endif
2146
2147 bus_unregister(&ide_bus_type);
2148 }
2149
2150 #else /* !MODULE */
2151
2152 __setup("", ide_setup);
2153
2154 module_init(ide_init);
2155
2156 #endif /* MODULE */
Support for the Chinese Samsung S3C2440 based development boards