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ide: add PIO masks
[mirror_ubuntu-artful-kernel.git] / drivers / ide / ide.c
1 /*
2 * linux/drivers/ide/ide.c Version 7.00beta2 Mar 05 2003
3 *
4 * Copyright (C) 1994-1998 Linus Torvalds & authors (see below)
5 */
6
7 /*
8 * Mostly written by Mark Lord <mlord@pobox.com>
9 * and Gadi Oxman <gadio@netvision.net.il>
10 * and Andre Hedrick <andre@linux-ide.org>
11 *
12 * See linux/MAINTAINERS for address of current maintainer.
13 *
14 * This is the multiple IDE interface driver, as evolved from hd.c.
15 * It supports up to MAX_HWIFS IDE interfaces, on one or more IRQs
16 * (usually 14 & 15).
17 * There can be up to two drives per interface, as per the ATA-2 spec.
18 *
19 * Primary: ide0, port 0x1f0; major=3; hda is minor=0; hdb is minor=64
20 * Secondary: ide1, port 0x170; major=22; hdc is minor=0; hdd is minor=64
21 * Tertiary: ide2, port 0x???; major=33; hde is minor=0; hdf is minor=64
22 * Quaternary: ide3, port 0x???; major=34; hdg is minor=0; hdh is minor=64
23 * ...
24 *
25 * From hd.c:
26 * |
27 * | It traverses the request-list, using interrupts to jump between functions.
28 * | As nearly all functions can be called within interrupts, we may not sleep.
29 * | Special care is recommended. Have Fun!
30 * |
31 * | modified by Drew Eckhardt to check nr of hd's from the CMOS.
32 * |
33 * | Thanks to Branko Lankester, lankeste@fwi.uva.nl, who found a bug
34 * | in the early extended-partition checks and added DM partitions.
35 * |
36 * | Early work on error handling by Mika Liljeberg (liljeber@cs.Helsinki.FI).
37 * |
38 * | IRQ-unmask, drive-id, multiple-mode, support for ">16 heads",
39 * | and general streamlining by Mark Lord (mlord@pobox.com).
40 *
41 * October, 1994 -- Complete line-by-line overhaul for linux 1.1.x, by:
42 *
43 * Mark Lord (mlord@pobox.com) (IDE Perf.Pkg)
44 * Delman Lee (delman@ieee.org) ("Mr. atdisk2")
45 * Scott Snyder (snyder@fnald0.fnal.gov) (ATAPI IDE cd-rom)
46 *
47 * This was a rewrite of just about everything from hd.c, though some original
48 * code is still sprinkled about. Think of it as a major evolution, with
49 * inspiration from lots of linux users, esp. hamish@zot.apana.org.au
50 *
51 * Version 1.0 ALPHA initial code, primary i/f working okay
52 * Version 1.3 BETA dual i/f on shared irq tested & working!
53 * Version 1.4 BETA added auto probing for irq(s)
54 * Version 1.5 BETA added ALPHA (untested) support for IDE cd-roms,
55 * ...
56 * Version 5.50 allow values as small as 20 for idebus=
57 * Version 5.51 force non io_32bit in drive_cmd_intr()
58 * change delay_10ms() to delay_50ms() to fix problems
59 * Version 5.52 fix incorrect invalidation of removable devices
60 * add "hdx=slow" command line option
61 * Version 5.60 start to modularize the driver; the disk and ATAPI
62 * drivers can be compiled as loadable modules.
63 * move IDE probe code to ide-probe.c
64 * move IDE disk code to ide-disk.c
65 * add support for generic IDE device subdrivers
66 * add m68k code from Geert Uytterhoeven
67 * probe all interfaces by default
68 * add ioctl to (re)probe an interface
69 * Version 6.00 use per device request queues
70 * attempt to optimize shared hwgroup performance
71 * add ioctl to manually adjust bandwidth algorithms
72 * add kerneld support for the probe module
73 * fix bug in ide_error()
74 * fix bug in the first ide_get_lock() call for Atari
75 * don't flush leftover data for ATAPI devices
76 * Version 6.01 clear hwgroup->active while the hwgroup sleeps
77 * support HDIO_GETGEO for floppies
78 * Version 6.02 fix ide_ack_intr() call
79 * check partition table on floppies
80 * Version 6.03 handle bad status bit sequencing in ide_wait_stat()
81 * Version 6.10 deleted old entries from this list of updates
82 * replaced triton.c with ide-dma.c generic PCI DMA
83 * added support for BIOS-enabled UltraDMA
84 * rename all "promise" things to "pdc4030"
85 * fix EZ-DRIVE handling on small disks
86 * Version 6.11 fix probe error in ide_scan_devices()
87 * fix ancient "jiffies" polling bugs
88 * mask all hwgroup interrupts on each irq entry
89 * Version 6.12 integrate ioctl and proc interfaces
90 * fix parsing of "idex=" command line parameter
91 * Version 6.13 add support for ide4/ide5 courtesy rjones@orchestream.com
92 * Version 6.14 fixed IRQ sharing among PCI devices
93 * Version 6.15 added SMP awareness to IDE drivers
94 * Version 6.16 fixed various bugs; even more SMP friendly
95 * Version 6.17 fix for newest EZ-Drive problem
96 * Version 6.18 default unpartitioned-disk translation now "BIOS LBA"
97 * Version 6.19 Re-design for a UNIFORM driver for all platforms,
98 * model based on suggestions from Russell King and
99 * Geert Uytterhoeven
100 * Promise DC4030VL now supported.
101 * add support for ide6/ide7
102 * delay_50ms() changed to ide_delay_50ms() and exported.
103 * Version 6.20 Added/Fixed Generic ATA-66 support and hwif detection.
104 * Added hdx=flash to allow for second flash disk
105 * detection w/o the hang loop.
106 * Added support for ide8/ide9
107 * Added idex=ata66 for the quirky chipsets that are
108 * ATA-66 compliant, but have yet to determine a method
109 * of verification of the 80c cable presence.
110 * Specifically Promise's PDC20262 chipset.
111 * Version 6.21 Fixing/Fixed SMP spinlock issue with insight from an old
112 * hat that clarified original low level driver design.
113 * Version 6.30 Added SMP support; fixed multmode issues. -ml
114 * Version 6.31 Debug Share INTR's and request queue streaming
115 * Native ATA-100 support
116 * Prep for Cascades Project
117 * Version 7.00alpha First named revision of ide rearrange
118 *
119 * Some additional driver compile-time options are in ./include/linux/ide.h
120 *
121 * To do, in likely order of completion:
122 * - modify kernel to obtain BIOS geometry for drives on 2nd/3rd/4th i/f
123 *
124 */
125
126 #define REVISION "Revision: 7.00alpha2"
127 #define VERSION "Id: ide.c 7.00a2 20020906"
128
129 #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
172 DEFINE_MUTEX(ide_cfg_mtx);
173 __cacheline_aligned_in_smp DEFINE_SPINLOCK(ide_lock);
174
175 #ifdef CONFIG_IDEPCI_PCIBUS_ORDER
176 static int ide_scan_direction; /* THIS was formerly 2.2.x pci=reverse */
177 #endif
178
179 int noautodma = 0;
180
181 EXPORT_SYMBOL(noautodma);
182
183 #ifdef CONFIG_BLK_DEV_IDEACPI
184 int ide_noacpi = 0;
185 int ide_noacpitfs = 1;
186 int ide_noacpionboot = 1;
187 #endif
188
189 /*
190 * This is declared extern in ide.h, for access by other IDE modules:
191 */
192 ide_hwif_t ide_hwifs[MAX_HWIFS]; /* master data repository */
193
194 EXPORT_SYMBOL(ide_hwifs);
195
196 /*
197 * Do not even *think* about calling this!
198 */
199 static void init_hwif_data(ide_hwif_t *hwif, unsigned int index)
200 {
201 unsigned int unit;
202
203 /* bulk initialize hwif & drive info with zeros */
204 memset(hwif, 0, sizeof(ide_hwif_t));
205
206 /* fill in any non-zero initial values */
207 hwif->index = index;
208 hwif->major = ide_hwif_to_major[index];
209
210 hwif->name[0] = 'i';
211 hwif->name[1] = 'd';
212 hwif->name[2] = 'e';
213 hwif->name[3] = '0' + index;
214
215 hwif->bus_state = BUSSTATE_ON;
216
217 hwif->atapi_dma = 0; /* disable all atapi dma */
218
219 init_completion(&hwif->gendev_rel_comp);
220
221 default_hwif_iops(hwif);
222 default_hwif_transport(hwif);
223 for (unit = 0; unit < MAX_DRIVES; ++unit) {
224 ide_drive_t *drive = &hwif->drives[unit];
225
226 drive->media = ide_disk;
227 drive->select.all = (unit<<4)|0xa0;
228 drive->hwif = hwif;
229 drive->ctl = 0x08;
230 drive->ready_stat = READY_STAT;
231 drive->bad_wstat = BAD_W_STAT;
232 drive->special.b.recalibrate = 1;
233 drive->special.b.set_geometry = 1;
234 drive->name[0] = 'h';
235 drive->name[1] = 'd';
236 drive->name[2] = 'a' + (index * MAX_DRIVES) + unit;
237 drive->max_failures = IDE_DEFAULT_MAX_FAILURES;
238 drive->using_dma = 0;
239 drive->vdma = 0;
240 INIT_LIST_HEAD(&drive->list);
241 init_completion(&drive->gendev_rel_comp);
242 }
243 }
244
245 static void init_hwif_default(ide_hwif_t *hwif, unsigned int index)
246 {
247 hw_regs_t hw;
248
249 memset(&hw, 0, sizeof(hw_regs_t));
250
251 ide_init_hwif_ports(&hw, ide_default_io_base(index), 0, &hwif->irq);
252
253 memcpy(&hwif->hw, &hw, sizeof(hw));
254 memcpy(hwif->io_ports, hw.io_ports, sizeof(hw.io_ports));
255
256 hwif->noprobe = !hwif->io_ports[IDE_DATA_OFFSET];
257 #ifdef CONFIG_BLK_DEV_HD
258 if (hwif->io_ports[IDE_DATA_OFFSET] == HD_DATA)
259 hwif->noprobe = 1; /* may be overridden by ide_setup() */
260 #endif
261 }
262
263 extern void ide_arm_init(void);
264
265 /*
266 * init_ide_data() sets reasonable default values into all fields
267 * of all instances of the hwifs and drives, but only on the first call.
268 * Subsequent calls have no effect (they don't wipe out anything).
269 *
270 * This routine is normally called at driver initialization time,
271 * but may also be called MUCH earlier during kernel "command-line"
272 * parameter processing. As such, we cannot depend on any other parts
273 * of the kernel (such as memory allocation) to be functioning yet.
274 *
275 * This is too bad, as otherwise we could dynamically allocate the
276 * ide_drive_t structs as needed, rather than always consuming memory
277 * for the max possible number (MAX_HWIFS * MAX_DRIVES) of them.
278 *
279 * FIXME: We should stuff the setup data into __init and copy the
280 * relevant hwifs/allocate them properly during boot.
281 */
282 #define MAGIC_COOKIE 0x12345678
283 static void __init init_ide_data (void)
284 {
285 ide_hwif_t *hwif;
286 unsigned int index;
287 static unsigned long magic_cookie = MAGIC_COOKIE;
288
289 if (magic_cookie != MAGIC_COOKIE)
290 return; /* already initialized */
291 magic_cookie = 0;
292
293 /* Initialise all interface structures */
294 for (index = 0; index < MAX_HWIFS; ++index) {
295 hwif = &ide_hwifs[index];
296 init_hwif_data(hwif, index);
297 init_hwif_default(hwif, index);
298 #if !defined(CONFIG_PPC32) || !defined(CONFIG_PCI)
299 hwif->irq = hwif->hw.irq =
300 ide_init_default_irq(hwif->io_ports[IDE_DATA_OFFSET]);
301 #endif
302 }
303 #ifdef CONFIG_IDE_ARM
304 ide_arm_init();
305 #endif
306 }
307
308 /**
309 * ide_system_bus_speed - guess bus speed
310 *
311 * ide_system_bus_speed() returns what we think is the system VESA/PCI
312 * bus speed (in MHz). This is used for calculating interface PIO timings.
313 * The default is 40 for known PCI systems, 50 otherwise.
314 * The "idebus=xx" parameter can be used to override this value.
315 * The actual value to be used is computed/displayed the first time
316 * through. Drivers should only use this as a last resort.
317 *
318 * Returns a guessed speed in MHz.
319 */
320
321 static int ide_system_bus_speed(void)
322 {
323 #ifdef CONFIG_PCI
324 static struct pci_device_id pci_default[] = {
325 { PCI_DEVICE(PCI_ANY_ID, PCI_ANY_ID) },
326 { }
327 };
328 #else
329 #define pci_default 0
330 #endif /* CONFIG_PCI */
331
332 if (!system_bus_speed) {
333 if (idebus_parameter) {
334 /* user supplied value */
335 system_bus_speed = idebus_parameter;
336 } else if (pci_dev_present(pci_default)) {
337 /* safe default value for PCI */
338 system_bus_speed = 33;
339 } else {
340 /* safe default value for VESA and PCI */
341 system_bus_speed = 50;
342 }
343 printk(KERN_INFO "ide: Assuming %dMHz system bus speed "
344 "for PIO modes%s\n", system_bus_speed,
345 idebus_parameter ? "" : "; override with idebus=xx");
346 }
347 return system_bus_speed;
348 }
349
350 static struct resource* hwif_request_region(ide_hwif_t *hwif,
351 unsigned long addr, int num)
352 {
353 struct resource *res = request_region(addr, num, hwif->name);
354
355 if (!res)
356 printk(KERN_ERR "%s: I/O resource 0x%lX-0x%lX not free.\n",
357 hwif->name, addr, addr+num-1);
358 return res;
359 }
360
361 /**
362 * ide_hwif_request_regions - request resources for IDE
363 * @hwif: interface to use
364 *
365 * Requests all the needed resources for an interface.
366 * Right now core IDE code does this work which is deeply wrong.
367 * MMIO leaves it to the controller driver,
368 * PIO will migrate this way over time.
369 */
370
371 int ide_hwif_request_regions(ide_hwif_t *hwif)
372 {
373 unsigned long addr;
374 unsigned int i;
375
376 if (hwif->mmio)
377 return 0;
378 addr = hwif->io_ports[IDE_CONTROL_OFFSET];
379 if (addr && !hwif_request_region(hwif, addr, 1))
380 goto control_region_busy;
381 hwif->straight8 = 0;
382 addr = hwif->io_ports[IDE_DATA_OFFSET];
383 if ((addr | 7) == hwif->io_ports[IDE_STATUS_OFFSET]) {
384 if (!hwif_request_region(hwif, addr, 8))
385 goto data_region_busy;
386 hwif->straight8 = 1;
387 return 0;
388 }
389 for (i = IDE_DATA_OFFSET; i <= IDE_STATUS_OFFSET; i++) {
390 addr = hwif->io_ports[i];
391 if (!hwif_request_region(hwif, addr, 1)) {
392 while (--i)
393 release_region(addr, 1);
394 goto data_region_busy;
395 }
396 }
397 return 0;
398
399 data_region_busy:
400 addr = hwif->io_ports[IDE_CONTROL_OFFSET];
401 if (addr)
402 release_region(addr, 1);
403 control_region_busy:
404 /* If any errors are return, we drop the hwif interface. */
405 return -EBUSY;
406 }
407
408 /**
409 * ide_hwif_release_regions - free IDE resources
410 *
411 * Note that we only release the standard ports,
412 * and do not even try to handle any extra ports
413 * allocated for weird IDE interface chipsets.
414 *
415 * Note also that we don't yet handle mmio resources here. More
416 * importantly our caller should be doing this so we need to
417 * restructure this as a helper function for drivers.
418 */
419
420 void ide_hwif_release_regions(ide_hwif_t *hwif)
421 {
422 u32 i = 0;
423
424 if (hwif->mmio)
425 return;
426 if (hwif->io_ports[IDE_CONTROL_OFFSET])
427 release_region(hwif->io_ports[IDE_CONTROL_OFFSET], 1);
428 if (hwif->straight8) {
429 release_region(hwif->io_ports[IDE_DATA_OFFSET], 8);
430 return;
431 }
432 for (i = IDE_DATA_OFFSET; i <= IDE_STATUS_OFFSET; i++)
433 if (hwif->io_ports[i])
434 release_region(hwif->io_ports[i], 1);
435 }
436
437 /**
438 * ide_hwif_restore - restore hwif to template
439 * @hwif: hwif to update
440 * @tmp_hwif: template
441 *
442 * Restore hwif to a previous state by copying most settings
443 * from the template.
444 */
445
446 static void ide_hwif_restore(ide_hwif_t *hwif, ide_hwif_t *tmp_hwif)
447 {
448 hwif->hwgroup = tmp_hwif->hwgroup;
449
450 hwif->gendev.parent = tmp_hwif->gendev.parent;
451
452 hwif->proc = tmp_hwif->proc;
453
454 hwif->major = tmp_hwif->major;
455 hwif->straight8 = tmp_hwif->straight8;
456 hwif->bus_state = tmp_hwif->bus_state;
457
458 hwif->host_flags = tmp_hwif->host_flags;
459
460 hwif->pio_mask = tmp_hwif->pio_mask;
461
462 hwif->atapi_dma = tmp_hwif->atapi_dma;
463 hwif->ultra_mask = tmp_hwif->ultra_mask;
464 hwif->mwdma_mask = tmp_hwif->mwdma_mask;
465 hwif->swdma_mask = tmp_hwif->swdma_mask;
466
467 hwif->cbl = tmp_hwif->cbl;
468
469 hwif->chipset = tmp_hwif->chipset;
470 hwif->hold = tmp_hwif->hold;
471
472 #ifdef CONFIG_BLK_DEV_IDEPCI
473 hwif->pci_dev = tmp_hwif->pci_dev;
474 hwif->cds = tmp_hwif->cds;
475 #endif
476
477 hwif->tuneproc = tmp_hwif->tuneproc;
478 hwif->speedproc = tmp_hwif->speedproc;
479 hwif->udma_filter = tmp_hwif->udma_filter;
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->dma_lost_irq = tmp_hwif->dma_lost_irq;
506 hwif->dma_timeout = tmp_hwif->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
543 hwif->hwif_data = tmp_hwif->hwif_data;
544 }
545
546 /**
547 * ide_unregister - free an IDE interface
548 * @index: index of interface (will change soon to a pointer)
549 *
550 * Perform the final unregister of an IDE interface. At the moment
551 * we don't refcount interfaces so this will also get split up.
552 *
553 * Locking:
554 * The caller must not hold the IDE locks
555 * The drive present/vanishing is not yet properly locked
556 * Take care with the callbacks. These have been split to avoid
557 * deadlocking the IDE layer. The shutdown callback is called
558 * before we take the lock and free resources. It is up to the
559 * caller to be sure there is no pending I/O here, and that
560 * the interface will not be reopened (present/vanishing locking
561 * isn't yet done BTW). After we commit to the final kill we
562 * call the cleanup callback with the ide locks held.
563 *
564 * Unregister restores the hwif structures to the default state.
565 * This is raving bonkers.
566 */
567
568 void ide_unregister(unsigned int index)
569 {
570 ide_drive_t *drive;
571 ide_hwif_t *hwif, *g;
572 static ide_hwif_t tmp_hwif; /* protected by ide_cfg_mtx */
573 ide_hwgroup_t *hwgroup;
574 int irq_count = 0, unit;
575
576 BUG_ON(index >= MAX_HWIFS);
577
578 BUG_ON(in_interrupt());
579 BUG_ON(irqs_disabled());
580 mutex_lock(&ide_cfg_mtx);
581 spin_lock_irq(&ide_lock);
582 hwif = &ide_hwifs[index];
583 if (!hwif->present)
584 goto abort;
585 for (unit = 0; unit < MAX_DRIVES; ++unit) {
586 drive = &hwif->drives[unit];
587 if (!drive->present)
588 continue;
589 spin_unlock_irq(&ide_lock);
590 device_unregister(&drive->gendev);
591 wait_for_completion(&drive->gendev_rel_comp);
592 spin_lock_irq(&ide_lock);
593 }
594 hwif->present = 0;
595
596 spin_unlock_irq(&ide_lock);
597
598 ide_proc_unregister_port(hwif);
599
600 hwgroup = hwif->hwgroup;
601 /*
602 * free the irq if we were the only hwif using it
603 */
604 g = hwgroup->hwif;
605 do {
606 if (g->irq == hwif->irq)
607 ++irq_count;
608 g = g->next;
609 } while (g != hwgroup->hwif);
610 if (irq_count == 1)
611 free_irq(hwif->irq, hwgroup);
612
613 spin_lock_irq(&ide_lock);
614 /*
615 * Note that we only release the standard ports,
616 * and do not even try to handle any extra ports
617 * allocated for weird IDE interface chipsets.
618 */
619 ide_hwif_release_regions(hwif);
620
621 /*
622 * Remove us from the hwgroup, and free
623 * the hwgroup if we were the only member
624 */
625 if (hwif->next == hwif) {
626 BUG_ON(hwgroup->hwif != hwif);
627 kfree(hwgroup);
628 } else {
629 /* There is another interface in hwgroup.
630 * Unlink us, and set hwgroup->drive and ->hwif to
631 * something sane.
632 */
633 g = hwgroup->hwif;
634 while (g->next != hwif)
635 g = g->next;
636 g->next = hwif->next;
637 if (hwgroup->hwif == hwif) {
638 /* Chose a random hwif for hwgroup->hwif.
639 * It's guaranteed that there are no drives
640 * left in the hwgroup.
641 */
642 BUG_ON(hwgroup->drive != NULL);
643 hwgroup->hwif = g;
644 }
645 BUG_ON(hwgroup->hwif == hwif);
646 }
647
648 /* More messed up locking ... */
649 spin_unlock_irq(&ide_lock);
650 device_unregister(&hwif->gendev);
651 wait_for_completion(&hwif->gendev_rel_comp);
652
653 /*
654 * Remove us from the kernel's knowledge
655 */
656 blk_unregister_region(MKDEV(hwif->major, 0), MAX_DRIVES<<PARTN_BITS);
657 kfree(hwif->sg_table);
658 unregister_blkdev(hwif->major, hwif->name);
659 spin_lock_irq(&ide_lock);
660
661 if (hwif->dma_base) {
662 (void) ide_release_dma(hwif);
663
664 hwif->dma_base = 0;
665 hwif->dma_master = 0;
666 hwif->dma_command = 0;
667 hwif->dma_vendor1 = 0;
668 hwif->dma_status = 0;
669 hwif->dma_vendor3 = 0;
670 hwif->dma_prdtable = 0;
671
672 hwif->extra_base = 0;
673 hwif->extra_ports = 0;
674 }
675
676 /* copy original settings */
677 tmp_hwif = *hwif;
678
679 /* restore hwif data to pristine status */
680 init_hwif_data(hwif, index);
681 init_hwif_default(hwif, index);
682
683 ide_hwif_restore(hwif, &tmp_hwif);
684
685 abort:
686 spin_unlock_irq(&ide_lock);
687 mutex_unlock(&ide_cfg_mtx);
688 }
689
690 EXPORT_SYMBOL(ide_unregister);
691
692
693 /**
694 * ide_setup_ports - set up IDE interface ports
695 * @hw: register descriptions
696 * @base: base register
697 * @offsets: table of register offsets
698 * @ctrl: control register
699 * @ack_irq: IRQ ack
700 * @irq: interrupt lie
701 *
702 * Setup hw_regs_t structure described by parameters. You
703 * may set up the hw structure yourself OR use this routine to
704 * do it for you. This is basically a helper
705 *
706 */
707
708 void ide_setup_ports ( hw_regs_t *hw,
709 unsigned long base, int *offsets,
710 unsigned long ctrl, unsigned long intr,
711 ide_ack_intr_t *ack_intr,
712 /*
713 * ide_io_ops_t *iops,
714 */
715 int irq)
716 {
717 int i;
718
719 memset(hw, 0, sizeof(hw_regs_t));
720 for (i = 0; i < IDE_NR_PORTS; i++) {
721 if (offsets[i] == -1) {
722 switch(i) {
723 case IDE_CONTROL_OFFSET:
724 hw->io_ports[i] = ctrl;
725 break;
726 #if defined(CONFIG_AMIGA) || defined(CONFIG_MAC)
727 case IDE_IRQ_OFFSET:
728 hw->io_ports[i] = intr;
729 break;
730 #endif /* (CONFIG_AMIGA) || (CONFIG_MAC) */
731 default:
732 hw->io_ports[i] = 0;
733 break;
734 }
735 } else {
736 hw->io_ports[i] = base + offsets[i];
737 }
738 }
739 hw->irq = irq;
740 hw->dma = NO_DMA;
741 hw->ack_intr = ack_intr;
742 /*
743 * hw->iops = iops;
744 */
745 }
746
747 /**
748 * ide_register_hw_with_fixup - register IDE interface
749 * @hw: hardware registers
750 * @initializing: set while initializing built-in drivers
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, int initializing,
761 ide_hwif_t **hwifp,
762 void(*fixup)(ide_hwif_t *hwif))
763 {
764 int index, retry = 1;
765 ide_hwif_t *hwif;
766
767 do {
768 for (index = 0; index < MAX_HWIFS; ++index) {
769 hwif = &ide_hwifs[index];
770 if (hwif->hw.io_ports[IDE_DATA_OFFSET] == hw->io_ports[IDE_DATA_OFFSET])
771 goto found;
772 }
773 for (index = 0; index < MAX_HWIFS; ++index) {
774 hwif = &ide_hwifs[index];
775 if (hwif->hold)
776 continue;
777 if ((!hwif->present && !hwif->mate && !initializing) ||
778 (!hwif->hw.io_ports[IDE_DATA_OFFSET] && initializing))
779 goto found;
780 }
781 for (index = 0; index < MAX_HWIFS; index++)
782 ide_unregister(index);
783 } while (retry--);
784 return -1;
785 found:
786 if (hwif->present)
787 ide_unregister(index);
788 else if (!hwif->hold) {
789 init_hwif_data(hwif, index);
790 init_hwif_default(hwif, index);
791 }
792 if (hwif->present)
793 return -1;
794 memcpy(&hwif->hw, hw, sizeof(*hw));
795 memcpy(hwif->io_ports, hwif->hw.io_ports, sizeof(hwif->hw.io_ports));
796 hwif->irq = hw->irq;
797 hwif->noprobe = 0;
798 hwif->chipset = hw->chipset;
799 hwif->gendev.parent = hw->dev;
800
801 if (!initializing) {
802 probe_hwif_init_with_fixup(hwif, fixup);
803 ide_proc_register_port(hwif);
804 }
805
806 if (hwifp)
807 *hwifp = hwif;
808
809 return (initializing || hwif->present) ? index : -1;
810 }
811
812 EXPORT_SYMBOL(ide_register_hw_with_fixup);
813
814 int ide_register_hw(hw_regs_t *hw, int initializing, ide_hwif_t **hwifp)
815 {
816 return ide_register_hw_with_fixup(hw, initializing, hwifp, NULL);
817 }
818
819 EXPORT_SYMBOL(ide_register_hw);
820
821 /*
822 * Locks for IDE setting functionality
823 */
824
825 DEFINE_MUTEX(ide_setting_mtx);
826
827 EXPORT_SYMBOL_GPL(ide_setting_mtx);
828
829 /**
830 * ide_spin_wait_hwgroup - wait for group
831 * @drive: drive in the group
832 *
833 * Wait for an IDE device group to go non busy and then return
834 * holding the ide_lock which guards the hwgroup->busy status
835 * and right to use it.
836 */
837
838 int ide_spin_wait_hwgroup (ide_drive_t *drive)
839 {
840 ide_hwgroup_t *hwgroup = HWGROUP(drive);
841 unsigned long timeout = jiffies + (3 * HZ);
842
843 spin_lock_irq(&ide_lock);
844
845 while (hwgroup->busy) {
846 unsigned long lflags;
847 spin_unlock_irq(&ide_lock);
848 local_irq_set(lflags);
849 if (time_after(jiffies, timeout)) {
850 local_irq_restore(lflags);
851 printk(KERN_ERR "%s: channel busy\n", drive->name);
852 return -EBUSY;
853 }
854 local_irq_restore(lflags);
855 spin_lock_irq(&ide_lock);
856 }
857 return 0;
858 }
859
860 EXPORT_SYMBOL(ide_spin_wait_hwgroup);
861
862 int set_io_32bit(ide_drive_t *drive, int arg)
863 {
864 if (drive->no_io_32bit)
865 return -EPERM;
866
867 if (arg < 0 || arg > 1 + (SUPPORT_VLB_SYNC << 1))
868 return -EINVAL;
869
870 drive->io_32bit = arg;
871 #ifdef CONFIG_BLK_DEV_DTC2278
872 if (HWIF(drive)->chipset == ide_dtc2278)
873 HWIF(drive)->drives[!drive->select.b.unit].io_32bit = arg;
874 #endif /* CONFIG_BLK_DEV_DTC2278 */
875 return 0;
876 }
877
878 static int set_ksettings(ide_drive_t *drive, int arg)
879 {
880 if (arg < 0 || arg > 1)
881 return -EINVAL;
882
883 if (ide_spin_wait_hwgroup(drive))
884 return -EBUSY;
885 drive->keep_settings = arg;
886 spin_unlock_irq(&ide_lock);
887
888 return 0;
889 }
890
891 int set_using_dma(ide_drive_t *drive, int arg)
892 {
893 #ifdef CONFIG_BLK_DEV_IDEDMA
894 ide_hwif_t *hwif = drive->hwif;
895 int err = -EPERM;
896
897 if (arg < 0 || arg > 1)
898 return -EINVAL;
899
900 if (!drive->id || !(drive->id->capability & 1))
901 goto out;
902
903 if (hwif->ide_dma_check == NULL)
904 goto out;
905
906 err = -EBUSY;
907 if (ide_spin_wait_hwgroup(drive))
908 goto out;
909 /*
910 * set ->busy flag, unlock and let it ride
911 */
912 hwif->hwgroup->busy = 1;
913 spin_unlock_irq(&ide_lock);
914
915 err = 0;
916
917 if (arg) {
918 hwif->dma_off_quietly(drive);
919 if (ide_set_dma(drive) || hwif->ide_dma_on(drive))
920 err = -EIO;
921 } else
922 ide_dma_off(drive);
923
924 /*
925 * lock, clear ->busy flag and unlock before leaving
926 */
927 spin_lock_irq(&ide_lock);
928 hwif->hwgroup->busy = 0;
929 spin_unlock_irq(&ide_lock);
930 out:
931 return err;
932 #else
933 if (arg < 0 || arg > 1)
934 return -EINVAL;
935
936 return -EPERM;
937 #endif
938 }
939
940 int set_pio_mode(ide_drive_t *drive, int arg)
941 {
942 struct request rq;
943
944 if (arg < 0 || arg > 255)
945 return -EINVAL;
946
947 if (!HWIF(drive)->tuneproc)
948 return -ENOSYS;
949 if (drive->special.b.set_tune)
950 return -EBUSY;
951 ide_init_drive_cmd(&rq);
952 drive->tune_req = (u8) arg;
953 drive->special.b.set_tune = 1;
954 (void) ide_do_drive_cmd(drive, &rq, ide_wait);
955 return 0;
956 }
957
958 static int set_unmaskirq(ide_drive_t *drive, int arg)
959 {
960 if (drive->no_unmask)
961 return -EPERM;
962
963 if (arg < 0 || arg > 1)
964 return -EINVAL;
965
966 if (ide_spin_wait_hwgroup(drive))
967 return -EBUSY;
968 drive->unmask = arg;
969 spin_unlock_irq(&ide_lock);
970
971 return 0;
972 }
973
974 /**
975 * system_bus_clock - clock guess
976 *
977 * External version of the bus clock guess used by very old IDE drivers
978 * for things like VLB timings. Should not be used.
979 */
980
981 int system_bus_clock (void)
982 {
983 return((int) ((!system_bus_speed) ? ide_system_bus_speed() : system_bus_speed ));
984 }
985
986 EXPORT_SYMBOL(system_bus_clock);
987
988 static int generic_ide_suspend(struct device *dev, pm_message_t mesg)
989 {
990 ide_drive_t *drive = dev->driver_data;
991 ide_hwif_t *hwif = HWIF(drive);
992 struct request rq;
993 struct request_pm_state rqpm;
994 ide_task_t args;
995
996 /* Call ACPI _GTM only once */
997 if (!(drive->dn % 2))
998 ide_acpi_get_timing(hwif);
999
1000 memset(&rq, 0, sizeof(rq));
1001 memset(&rqpm, 0, sizeof(rqpm));
1002 memset(&args, 0, sizeof(args));
1003 rq.cmd_type = REQ_TYPE_PM_SUSPEND;
1004 rq.special = &args;
1005 rq.data = &rqpm;
1006 rqpm.pm_step = ide_pm_state_start_suspend;
1007 if (mesg.event == PM_EVENT_PRETHAW)
1008 mesg.event = PM_EVENT_FREEZE;
1009 rqpm.pm_state = mesg.event;
1010
1011 return ide_do_drive_cmd(drive, &rq, ide_wait);
1012 }
1013
1014 static int generic_ide_resume(struct device *dev)
1015 {
1016 ide_drive_t *drive = dev->driver_data;
1017 ide_hwif_t *hwif = HWIF(drive);
1018 struct request rq;
1019 struct request_pm_state rqpm;
1020 ide_task_t args;
1021 int err;
1022
1023 /* Call ACPI _STM only once */
1024 if (!(drive->dn % 2))
1025 ide_acpi_push_timing(hwif);
1026
1027 ide_acpi_exec_tfs(drive);
1028
1029 memset(&rq, 0, sizeof(rq));
1030 memset(&rqpm, 0, sizeof(rqpm));
1031 memset(&args, 0, sizeof(args));
1032 rq.cmd_type = REQ_TYPE_PM_RESUME;
1033 rq.special = &args;
1034 rq.data = &rqpm;
1035 rqpm.pm_step = ide_pm_state_start_resume;
1036 rqpm.pm_state = PM_EVENT_ON;
1037
1038 err = ide_do_drive_cmd(drive, &rq, ide_head_wait);
1039
1040 if (err == 0 && dev->driver) {
1041 ide_driver_t *drv = to_ide_driver(dev->driver);
1042
1043 if (drv->resume)
1044 drv->resume(drive);
1045 }
1046
1047 return err;
1048 }
1049
1050 int generic_ide_ioctl(ide_drive_t *drive, struct file *file, struct block_device *bdev,
1051 unsigned int cmd, unsigned long arg)
1052 {
1053 unsigned long flags;
1054 ide_driver_t *drv;
1055 void __user *p = (void __user *)arg;
1056 int err = 0, (*setfunc)(ide_drive_t *, int);
1057 u8 *val;
1058
1059 switch (cmd) {
1060 case HDIO_GET_32BIT: val = &drive->io_32bit; goto read_val;
1061 case HDIO_GET_KEEPSETTINGS: val = &drive->keep_settings; goto read_val;
1062 case HDIO_GET_UNMASKINTR: val = &drive->unmask; goto read_val;
1063 case HDIO_GET_DMA: val = &drive->using_dma; goto read_val;
1064 case HDIO_SET_32BIT: setfunc = set_io_32bit; goto set_val;
1065 case HDIO_SET_KEEPSETTINGS: setfunc = set_ksettings; goto set_val;
1066 case HDIO_SET_PIO_MODE: setfunc = set_pio_mode; goto set_val;
1067 case HDIO_SET_UNMASKINTR: setfunc = set_unmaskirq; goto set_val;
1068 case HDIO_SET_DMA: setfunc = set_using_dma; goto set_val;
1069 }
1070
1071 switch (cmd) {
1072 case HDIO_OBSOLETE_IDENTITY:
1073 case HDIO_GET_IDENTITY:
1074 if (bdev != bdev->bd_contains)
1075 return -EINVAL;
1076 if (drive->id_read == 0)
1077 return -ENOMSG;
1078 if (copy_to_user(p, drive->id, (cmd == HDIO_GET_IDENTITY) ? sizeof(*drive->id) : 142))
1079 return -EFAULT;
1080 return 0;
1081
1082 case HDIO_GET_NICE:
1083 return put_user(drive->dsc_overlap << IDE_NICE_DSC_OVERLAP |
1084 drive->atapi_overlap << IDE_NICE_ATAPI_OVERLAP |
1085 drive->nice0 << IDE_NICE_0 |
1086 drive->nice1 << IDE_NICE_1 |
1087 drive->nice2 << IDE_NICE_2,
1088 (long __user *) arg);
1089
1090 #ifdef CONFIG_IDE_TASK_IOCTL
1091 case HDIO_DRIVE_TASKFILE:
1092 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
1093 return -EACCES;
1094 switch(drive->media) {
1095 case ide_disk:
1096 return ide_taskfile_ioctl(drive, cmd, arg);
1097 default:
1098 return -ENOMSG;
1099 }
1100 #endif /* CONFIG_IDE_TASK_IOCTL */
1101
1102 case HDIO_DRIVE_CMD:
1103 if (!capable(CAP_SYS_RAWIO))
1104 return -EACCES;
1105 return ide_cmd_ioctl(drive, cmd, arg);
1106
1107 case HDIO_DRIVE_TASK:
1108 if (!capable(CAP_SYS_RAWIO))
1109 return -EACCES;
1110 return ide_task_ioctl(drive, cmd, arg);
1111
1112 case HDIO_SCAN_HWIF:
1113 {
1114 hw_regs_t hw;
1115 int args[3];
1116 if (!capable(CAP_SYS_RAWIO)) return -EACCES;
1117 if (copy_from_user(args, p, 3 * sizeof(int)))
1118 return -EFAULT;
1119 memset(&hw, 0, sizeof(hw));
1120 ide_init_hwif_ports(&hw, (unsigned long) args[0],
1121 (unsigned long) args[1], NULL);
1122 hw.irq = args[2];
1123 if (ide_register_hw(&hw, 0, NULL) == -1)
1124 return -EIO;
1125 return 0;
1126 }
1127 case HDIO_UNREGISTER_HWIF:
1128 if (!capable(CAP_SYS_RAWIO)) return -EACCES;
1129 /* (arg > MAX_HWIFS) checked in function */
1130 ide_unregister(arg);
1131 return 0;
1132 case HDIO_SET_NICE:
1133 if (!capable(CAP_SYS_ADMIN)) return -EACCES;
1134 if (arg != (arg & ((1 << IDE_NICE_DSC_OVERLAP) | (1 << IDE_NICE_1))))
1135 return -EPERM;
1136 drive->dsc_overlap = (arg >> IDE_NICE_DSC_OVERLAP) & 1;
1137 drv = *(ide_driver_t **)bdev->bd_disk->private_data;
1138 if (drive->dsc_overlap && !drv->supports_dsc_overlap) {
1139 drive->dsc_overlap = 0;
1140 return -EPERM;
1141 }
1142 drive->nice1 = (arg >> IDE_NICE_1) & 1;
1143 return 0;
1144 case HDIO_DRIVE_RESET:
1145 {
1146 unsigned long flags;
1147 if (!capable(CAP_SYS_ADMIN)) return -EACCES;
1148
1149 /*
1150 * Abort the current command on the
1151 * group if there is one, taking
1152 * care not to allow anything else
1153 * to be queued and to die on the
1154 * spot if we miss one somehow
1155 */
1156
1157 spin_lock_irqsave(&ide_lock, flags);
1158
1159 if (HWGROUP(drive)->resetting) {
1160 spin_unlock_irqrestore(&ide_lock, flags);
1161 return -EBUSY;
1162 }
1163
1164 ide_abort(drive, "drive reset");
1165
1166 BUG_ON(HWGROUP(drive)->handler);
1167
1168 /* Ensure nothing gets queued after we
1169 drop the lock. Reset will clear the busy */
1170
1171 HWGROUP(drive)->busy = 1;
1172 spin_unlock_irqrestore(&ide_lock, flags);
1173 (void) ide_do_reset(drive);
1174
1175 return 0;
1176 }
1177
1178 case CDROMEJECT:
1179 case CDROMCLOSETRAY:
1180 return scsi_cmd_ioctl(file, bdev->bd_disk->queue, bdev->bd_disk, cmd, p);
1181
1182 case HDIO_GET_BUSSTATE:
1183 if (!capable(CAP_SYS_ADMIN))
1184 return -EACCES;
1185 if (put_user(HWIF(drive)->bus_state, (long __user *)arg))
1186 return -EFAULT;
1187 return 0;
1188
1189 case HDIO_SET_BUSSTATE:
1190 if (!capable(CAP_SYS_ADMIN))
1191 return -EACCES;
1192 if (HWIF(drive)->busproc)
1193 return HWIF(drive)->busproc(drive, (int)arg);
1194 return -EOPNOTSUPP;
1195 default:
1196 return -EINVAL;
1197 }
1198
1199 read_val:
1200 mutex_lock(&ide_setting_mtx);
1201 spin_lock_irqsave(&ide_lock, flags);
1202 err = *val;
1203 spin_unlock_irqrestore(&ide_lock, flags);
1204 mutex_unlock(&ide_setting_mtx);
1205 return err >= 0 ? put_user(err, (long __user *)arg) : err;
1206
1207 set_val:
1208 if (bdev != bdev->bd_contains)
1209 err = -EINVAL;
1210 else {
1211 if (!capable(CAP_SYS_ADMIN))
1212 err = -EACCES;
1213 else {
1214 mutex_lock(&ide_setting_mtx);
1215 err = setfunc(drive, arg);
1216 mutex_unlock(&ide_setting_mtx);
1217 }
1218 }
1219 return err;
1220 }
1221
1222 EXPORT_SYMBOL(generic_ide_ioctl);
1223
1224 /*
1225 * stridx() returns the offset of c within s,
1226 * or -1 if c is '\0' or not found within s.
1227 */
1228 static int __init stridx (const char *s, char c)
1229 {
1230 char *i = strchr(s, c);
1231 return (i && c) ? i - s : -1;
1232 }
1233
1234 /*
1235 * match_parm() does parsing for ide_setup():
1236 *
1237 * 1. the first char of s must be '='.
1238 * 2. if the remainder matches one of the supplied keywords,
1239 * the index (1 based) of the keyword is negated and returned.
1240 * 3. if the remainder is a series of no more than max_vals numbers
1241 * separated by commas, the numbers are saved in vals[] and a
1242 * count of how many were saved is returned. Base10 is assumed,
1243 * and base16 is allowed when prefixed with "0x".
1244 * 4. otherwise, zero is returned.
1245 */
1246 static int __init match_parm (char *s, const char *keywords[], int vals[], int max_vals)
1247 {
1248 static const char *decimal = "0123456789";
1249 static const char *hex = "0123456789abcdef";
1250 int i, n;
1251
1252 if (*s++ == '=') {
1253 /*
1254 * Try matching against the supplied keywords,
1255 * and return -(index+1) if we match one
1256 */
1257 if (keywords != NULL) {
1258 for (i = 0; *keywords != NULL; ++i) {
1259 if (!strcmp(s, *keywords++))
1260 return -(i+1);
1261 }
1262 }
1263 /*
1264 * Look for a series of no more than "max_vals"
1265 * numeric values separated by commas, in base10,
1266 * or base16 when prefixed with "0x".
1267 * Return a count of how many were found.
1268 */
1269 for (n = 0; (i = stridx(decimal, *s)) >= 0;) {
1270 vals[n] = i;
1271 while ((i = stridx(decimal, *++s)) >= 0)
1272 vals[n] = (vals[n] * 10) + i;
1273 if (*s == 'x' && !vals[n]) {
1274 while ((i = stridx(hex, *++s)) >= 0)
1275 vals[n] = (vals[n] * 0x10) + i;
1276 }
1277 if (++n == max_vals)
1278 break;
1279 if (*s == ',' || *s == ';')
1280 ++s;
1281 }
1282 if (!*s)
1283 return n;
1284 }
1285 return 0; /* zero = nothing matched */
1286 }
1287
1288 #ifdef CONFIG_BLK_DEV_ALI14XX
1289 extern int probe_ali14xx;
1290 extern int ali14xx_init(void);
1291 #endif
1292 #ifdef CONFIG_BLK_DEV_UMC8672
1293 extern int probe_umc8672;
1294 extern int umc8672_init(void);
1295 #endif
1296 #ifdef CONFIG_BLK_DEV_DTC2278
1297 extern int probe_dtc2278;
1298 extern int dtc2278_init(void);
1299 #endif
1300 #ifdef CONFIG_BLK_DEV_HT6560B
1301 extern int probe_ht6560b;
1302 extern int ht6560b_init(void);
1303 #endif
1304 #ifdef CONFIG_BLK_DEV_QD65XX
1305 extern int probe_qd65xx;
1306 extern int qd65xx_init(void);
1307 #endif
1308
1309 static int __initdata is_chipset_set[MAX_HWIFS];
1310
1311 /*
1312 * ide_setup() gets called VERY EARLY during initialization,
1313 * to handle kernel "command line" strings beginning with "hdx=" or "ide".
1314 *
1315 * Remember to update Documentation/ide.txt if you change something here.
1316 */
1317 static int __init ide_setup(char *s)
1318 {
1319 int i, vals[3];
1320 ide_hwif_t *hwif;
1321 ide_drive_t *drive;
1322 unsigned int hw, unit;
1323 const char max_drive = 'a' + ((MAX_HWIFS * MAX_DRIVES) - 1);
1324 const char max_hwif = '0' + (MAX_HWIFS - 1);
1325
1326
1327 if (strncmp(s,"hd",2) == 0 && s[2] == '=') /* hd= is for hd.c */
1328 return 0; /* driver and not us */
1329
1330 if (strncmp(s,"ide",3) && strncmp(s,"idebus",6) && strncmp(s,"hd",2))
1331 return 0;
1332
1333 printk(KERN_INFO "ide_setup: %s", s);
1334 init_ide_data ();
1335
1336 #ifdef CONFIG_BLK_DEV_IDEDOUBLER
1337 if (!strcmp(s, "ide=doubler")) {
1338 extern int ide_doubler;
1339
1340 printk(" : Enabled support for IDE doublers\n");
1341 ide_doubler = 1;
1342 return 1;
1343 }
1344 #endif /* CONFIG_BLK_DEV_IDEDOUBLER */
1345
1346 if (!strcmp(s, "ide=nodma")) {
1347 printk(" : Prevented DMA\n");
1348 noautodma = 1;
1349 return 1;
1350 }
1351
1352 #ifdef CONFIG_IDEPCI_PCIBUS_ORDER
1353 if (!strcmp(s, "ide=reverse")) {
1354 ide_scan_direction = 1;
1355 printk(" : Enabled support for IDE inverse scan order.\n");
1356 return 1;
1357 }
1358 #endif
1359
1360 #ifdef CONFIG_BLK_DEV_IDEACPI
1361 if (!strcmp(s, "ide=noacpi")) {
1362 //printk(" : Disable IDE ACPI support.\n");
1363 ide_noacpi = 1;
1364 return 1;
1365 }
1366 if (!strcmp(s, "ide=acpigtf")) {
1367 //printk(" : Enable IDE ACPI _GTF support.\n");
1368 ide_noacpitfs = 0;
1369 return 1;
1370 }
1371 if (!strcmp(s, "ide=acpionboot")) {
1372 //printk(" : Call IDE ACPI methods on boot.\n");
1373 ide_noacpionboot = 0;
1374 return 1;
1375 }
1376 #endif /* CONFIG_BLK_DEV_IDEACPI */
1377
1378 /*
1379 * Look for drive options: "hdx="
1380 */
1381 if (s[0] == 'h' && s[1] == 'd' && s[2] >= 'a' && s[2] <= max_drive) {
1382 const char *hd_words[] = {
1383 "none", "noprobe", "nowerr", "cdrom", "minus5",
1384 "autotune", "noautotune", "minus8", "swapdata", "bswap",
1385 "noflush", "remap", "remap63", "scsi", NULL };
1386 unit = s[2] - 'a';
1387 hw = unit / MAX_DRIVES;
1388 unit = unit % MAX_DRIVES;
1389 hwif = &ide_hwifs[hw];
1390 drive = &hwif->drives[unit];
1391 if (strncmp(s + 4, "ide-", 4) == 0) {
1392 strlcpy(drive->driver_req, s + 4, sizeof(drive->driver_req));
1393 goto done;
1394 }
1395 switch (match_parm(&s[3], hd_words, vals, 3)) {
1396 case -1: /* "none" */
1397 case -2: /* "noprobe" */
1398 drive->noprobe = 1;
1399 goto done;
1400 case -3: /* "nowerr" */
1401 drive->bad_wstat = BAD_R_STAT;
1402 hwif->noprobe = 0;
1403 goto done;
1404 case -4: /* "cdrom" */
1405 drive->present = 1;
1406 drive->media = ide_cdrom;
1407 /* an ATAPI device ignores DRDY */
1408 drive->ready_stat = 0;
1409 hwif->noprobe = 0;
1410 goto done;
1411 case -6: /* "autotune" */
1412 drive->autotune = IDE_TUNE_AUTO;
1413 goto obsolete_option;
1414 case -7: /* "noautotune" */
1415 drive->autotune = IDE_TUNE_NOAUTO;
1416 goto obsolete_option;
1417 case -9: /* "swapdata" */
1418 case -10: /* "bswap" */
1419 drive->bswap = 1;
1420 goto done;
1421 case -11: /* noflush */
1422 drive->noflush = 1;
1423 goto done;
1424 case -12: /* "remap" */
1425 drive->remap_0_to_1 = 1;
1426 goto done;
1427 case -13: /* "remap63" */
1428 drive->sect0 = 63;
1429 goto done;
1430 case -14: /* "scsi" */
1431 drive->scsi = 1;
1432 goto done;
1433 case 3: /* cyl,head,sect */
1434 drive->media = ide_disk;
1435 drive->ready_stat = READY_STAT;
1436 drive->cyl = drive->bios_cyl = vals[0];
1437 drive->head = drive->bios_head = vals[1];
1438 drive->sect = drive->bios_sect = vals[2];
1439 drive->present = 1;
1440 drive->forced_geom = 1;
1441 hwif->noprobe = 0;
1442 goto done;
1443 default:
1444 goto bad_option;
1445 }
1446 }
1447
1448 if (s[0] != 'i' || s[1] != 'd' || s[2] != 'e')
1449 goto bad_option;
1450 /*
1451 * Look for bus speed option: "idebus="
1452 */
1453 if (s[3] == 'b' && s[4] == 'u' && s[5] == 's') {
1454 if (match_parm(&s[6], NULL, vals, 1) != 1)
1455 goto bad_option;
1456 if (vals[0] >= 20 && vals[0] <= 66) {
1457 idebus_parameter = vals[0];
1458 } else
1459 printk(" -- BAD BUS SPEED! Expected value from 20 to 66");
1460 goto done;
1461 }
1462 /*
1463 * Look for interface options: "idex="
1464 */
1465 if (s[3] >= '0' && s[3] <= max_hwif) {
1466 /*
1467 * Be VERY CAREFUL changing this: note hardcoded indexes below
1468 * (-8, -9, -10) are reserved to ease the hardcoding.
1469 */
1470 static const char *ide_words[] = {
1471 "noprobe", "serialize", "minus3", "minus4",
1472 "reset", "dma", "ata66", "minus8", "minus9",
1473 "minus10", "four", "qd65xx", "ht6560b", "cmd640_vlb",
1474 "dtc2278", "umc8672", "ali14xx", NULL };
1475 hw = s[3] - '0';
1476 hwif = &ide_hwifs[hw];
1477 i = match_parm(&s[4], ide_words, vals, 3);
1478
1479 /*
1480 * Cryptic check to ensure chipset not already set for hwif.
1481 * Note: we can't depend on hwif->chipset here.
1482 */
1483 if ((i >= -18 && i <= -11) || (i > 0 && i <= 3)) {
1484 /* chipset already specified */
1485 if (is_chipset_set[hw])
1486 goto bad_option;
1487 if (i > -18 && i <= -11) {
1488 /* these drivers are for "ide0=" only */
1489 if (hw != 0)
1490 goto bad_hwif;
1491 /* chipset already specified for 2nd port */
1492 if (is_chipset_set[hw+1])
1493 goto bad_option;
1494 }
1495 is_chipset_set[hw] = 1;
1496 printk("\n");
1497 }
1498
1499 switch (i) {
1500 #ifdef CONFIG_BLK_DEV_ALI14XX
1501 case -17: /* "ali14xx" */
1502 probe_ali14xx = 1;
1503 goto done;
1504 #endif
1505 #ifdef CONFIG_BLK_DEV_UMC8672
1506 case -16: /* "umc8672" */
1507 probe_umc8672 = 1;
1508 goto done;
1509 #endif
1510 #ifdef CONFIG_BLK_DEV_DTC2278
1511 case -15: /* "dtc2278" */
1512 probe_dtc2278 = 1;
1513 goto done;
1514 #endif
1515 #ifdef CONFIG_BLK_DEV_CMD640
1516 case -14: /* "cmd640_vlb" */
1517 {
1518 extern int cmd640_vlb; /* flag for cmd640.c */
1519 cmd640_vlb = 1;
1520 goto done;
1521 }
1522 #endif
1523 #ifdef CONFIG_BLK_DEV_HT6560B
1524 case -13: /* "ht6560b" */
1525 probe_ht6560b = 1;
1526 goto done;
1527 #endif
1528 #ifdef CONFIG_BLK_DEV_QD65XX
1529 case -12: /* "qd65xx" */
1530 probe_qd65xx = 1;
1531 goto done;
1532 #endif
1533 #ifdef CONFIG_BLK_DEV_4DRIVES
1534 case -11: /* "four" drives on one set of ports */
1535 {
1536 ide_hwif_t *mate = &ide_hwifs[hw^1];
1537 mate->drives[0].select.all ^= 0x20;
1538 mate->drives[1].select.all ^= 0x20;
1539 hwif->chipset = mate->chipset = ide_4drives;
1540 mate->irq = hwif->irq;
1541 memcpy(mate->io_ports, hwif->io_ports, sizeof(hwif->io_ports));
1542 hwif->mate = mate;
1543 mate->mate = hwif;
1544 hwif->serialized = mate->serialized = 1;
1545 goto obsolete_option;
1546 }
1547 #endif /* CONFIG_BLK_DEV_4DRIVES */
1548 case -10: /* minus10 */
1549 case -9: /* minus9 */
1550 case -8: /* minus8 */
1551 case -4:
1552 case -3:
1553 goto bad_option;
1554 case -7: /* ata66 */
1555 #ifdef CONFIG_BLK_DEV_IDEPCI
1556 /*
1557 * Use ATA_CBL_PATA40_SHORT so drive side
1558 * cable detection is also overriden.
1559 */
1560 hwif->cbl = ATA_CBL_PATA40_SHORT;
1561 goto obsolete_option;
1562 #else
1563 goto bad_hwif;
1564 #endif
1565 case -6: /* dma */
1566 hwif->autodma = 1;
1567 goto obsolete_option;
1568 case -5: /* "reset" */
1569 hwif->reset = 1;
1570 goto obsolete_option;
1571 case -2: /* "serialize" */
1572 hwif->mate = &ide_hwifs[hw^1];
1573 hwif->mate->mate = hwif;
1574 hwif->serialized = hwif->mate->serialized = 1;
1575 goto obsolete_option;
1576
1577 case -1: /* "noprobe" */
1578 hwif->noprobe = 1;
1579 goto done;
1580
1581 case 1: /* base */
1582 vals[1] = vals[0] + 0x206; /* default ctl */
1583 case 2: /* base,ctl */
1584 vals[2] = 0; /* default irq = probe for it */
1585 case 3: /* base,ctl,irq */
1586 hwif->hw.irq = vals[2];
1587 ide_init_hwif_ports(&hwif->hw, (unsigned long) vals[0], (unsigned long) vals[1], &hwif->irq);
1588 memcpy(hwif->io_ports, hwif->hw.io_ports, sizeof(hwif->io_ports));
1589 hwif->irq = vals[2];
1590 hwif->noprobe = 0;
1591 hwif->chipset = ide_forced;
1592 goto obsolete_option;
1593
1594 case 0: goto bad_option;
1595 default:
1596 printk(" -- SUPPORT NOT CONFIGURED IN THIS KERNEL\n");
1597 return 1;
1598 }
1599 }
1600 bad_option:
1601 printk(" -- BAD OPTION\n");
1602 return 1;
1603 obsolete_option:
1604 printk(" -- OBSOLETE OPTION, WILL BE REMOVED SOON!\n");
1605 return 1;
1606 bad_hwif:
1607 printk("-- NOT SUPPORTED ON ide%d", hw);
1608 done:
1609 printk("\n");
1610 return 1;
1611 }
1612
1613 extern void __init pnpide_init(void);
1614 extern void __exit pnpide_exit(void);
1615 extern void __init h8300_ide_init(void);
1616
1617 /*
1618 * probe_for_hwifs() finds/initializes "known" IDE interfaces
1619 */
1620 static void __init probe_for_hwifs (void)
1621 {
1622 #ifdef CONFIG_IDEPCI_PCIBUS_ORDER
1623 ide_scan_pcibus(ide_scan_direction);
1624 #endif
1625
1626 #ifdef CONFIG_ETRAX_IDE
1627 {
1628 extern void init_e100_ide(void);
1629 init_e100_ide();
1630 }
1631 #endif /* CONFIG_ETRAX_IDE */
1632 #ifdef CONFIG_BLK_DEV_CMD640
1633 {
1634 extern void ide_probe_for_cmd640x(void);
1635 ide_probe_for_cmd640x();
1636 }
1637 #endif /* CONFIG_BLK_DEV_CMD640 */
1638 #ifdef CONFIG_BLK_DEV_IDE_PMAC
1639 {
1640 extern int pmac_ide_probe(void);
1641 (void)pmac_ide_probe();
1642 }
1643 #endif /* CONFIG_BLK_DEV_IDE_PMAC */
1644 #ifdef CONFIG_BLK_DEV_GAYLE
1645 {
1646 extern void gayle_init(void);
1647 gayle_init();
1648 }
1649 #endif /* CONFIG_BLK_DEV_GAYLE */
1650 #ifdef CONFIG_BLK_DEV_FALCON_IDE
1651 {
1652 extern void falconide_init(void);
1653 falconide_init();
1654 }
1655 #endif /* CONFIG_BLK_DEV_FALCON_IDE */
1656 #ifdef CONFIG_BLK_DEV_MAC_IDE
1657 {
1658 extern void macide_init(void);
1659 macide_init();
1660 }
1661 #endif /* CONFIG_BLK_DEV_MAC_IDE */
1662 #ifdef CONFIG_BLK_DEV_Q40IDE
1663 {
1664 extern void q40ide_init(void);
1665 q40ide_init();
1666 }
1667 #endif /* CONFIG_BLK_DEV_Q40IDE */
1668 #ifdef CONFIG_BLK_DEV_BUDDHA
1669 {
1670 extern void buddha_init(void);
1671 buddha_init();
1672 }
1673 #endif /* CONFIG_BLK_DEV_BUDDHA */
1674 #ifdef CONFIG_BLK_DEV_IDEPNP
1675 pnpide_init();
1676 #endif
1677 #ifdef CONFIG_H8300
1678 h8300_ide_init();
1679 #endif
1680 }
1681
1682 /*
1683 * Probe module
1684 */
1685
1686 EXPORT_SYMBOL(ide_lock);
1687
1688 static int ide_bus_match(struct device *dev, struct device_driver *drv)
1689 {
1690 return 1;
1691 }
1692
1693 static char *media_string(ide_drive_t *drive)
1694 {
1695 switch (drive->media) {
1696 case ide_disk:
1697 return "disk";
1698 case ide_cdrom:
1699 return "cdrom";
1700 case ide_tape:
1701 return "tape";
1702 case ide_floppy:
1703 return "floppy";
1704 case ide_optical:
1705 return "optical";
1706 default:
1707 return "UNKNOWN";
1708 }
1709 }
1710
1711 static ssize_t media_show(struct device *dev, struct device_attribute *attr, char *buf)
1712 {
1713 ide_drive_t *drive = to_ide_device(dev);
1714 return sprintf(buf, "%s\n", media_string(drive));
1715 }
1716
1717 static ssize_t drivename_show(struct device *dev, struct device_attribute *attr, char *buf)
1718 {
1719 ide_drive_t *drive = to_ide_device(dev);
1720 return sprintf(buf, "%s\n", drive->name);
1721 }
1722
1723 static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf)
1724 {
1725 ide_drive_t *drive = to_ide_device(dev);
1726 return sprintf(buf, "ide:m-%s\n", media_string(drive));
1727 }
1728
1729 static struct device_attribute ide_dev_attrs[] = {
1730 __ATTR_RO(media),
1731 __ATTR_RO(drivename),
1732 __ATTR_RO(modalias),
1733 __ATTR_NULL
1734 };
1735
1736 static int ide_uevent(struct device *dev, char **envp, int num_envp,
1737 char *buffer, int buffer_size)
1738 {
1739 ide_drive_t *drive = to_ide_device(dev);
1740 int i = 0;
1741 int length = 0;
1742
1743 add_uevent_var(envp, num_envp, &i, buffer, buffer_size, &length,
1744 "MEDIA=%s", media_string(drive));
1745 add_uevent_var(envp, num_envp, &i, buffer, buffer_size, &length,
1746 "DRIVENAME=%s", drive->name);
1747 add_uevent_var(envp, num_envp, &i, buffer, buffer_size, &length,
1748 "MODALIAS=ide:m-%s", media_string(drive));
1749 envp[i] = NULL;
1750 return 0;
1751 }
1752
1753 static int generic_ide_probe(struct device *dev)
1754 {
1755 ide_drive_t *drive = to_ide_device(dev);
1756 ide_driver_t *drv = to_ide_driver(dev->driver);
1757
1758 return drv->probe ? drv->probe(drive) : -ENODEV;
1759 }
1760
1761 static int generic_ide_remove(struct device *dev)
1762 {
1763 ide_drive_t *drive = to_ide_device(dev);
1764 ide_driver_t *drv = to_ide_driver(dev->driver);
1765
1766 if (drv->remove)
1767 drv->remove(drive);
1768
1769 return 0;
1770 }
1771
1772 static void generic_ide_shutdown(struct device *dev)
1773 {
1774 ide_drive_t *drive = to_ide_device(dev);
1775 ide_driver_t *drv = to_ide_driver(dev->driver);
1776
1777 if (dev->driver && drv->shutdown)
1778 drv->shutdown(drive);
1779 }
1780
1781 struct bus_type ide_bus_type = {
1782 .name = "ide",
1783 .match = ide_bus_match,
1784 .uevent = ide_uevent,
1785 .probe = generic_ide_probe,
1786 .remove = generic_ide_remove,
1787 .shutdown = generic_ide_shutdown,
1788 .dev_attrs = ide_dev_attrs,
1789 .suspend = generic_ide_suspend,
1790 .resume = generic_ide_resume,
1791 };
1792
1793 EXPORT_SYMBOL_GPL(ide_bus_type);
1794
1795 /*
1796 * This is gets invoked once during initialization, to set *everything* up
1797 */
1798 static int __init ide_init(void)
1799 {
1800 int ret;
1801
1802 printk(KERN_INFO "Uniform Multi-Platform E-IDE driver " REVISION "\n");
1803 system_bus_speed = ide_system_bus_speed();
1804
1805 ret = bus_register(&ide_bus_type);
1806 if (ret < 0) {
1807 printk(KERN_WARNING "IDE: bus_register error: %d\n", ret);
1808 return ret;
1809 }
1810
1811 init_ide_data();
1812
1813 proc_ide_create();
1814
1815 #ifdef CONFIG_BLK_DEV_ALI14XX
1816 if (probe_ali14xx)
1817 (void)ali14xx_init();
1818 #endif
1819 #ifdef CONFIG_BLK_DEV_UMC8672
1820 if (probe_umc8672)
1821 (void)umc8672_init();
1822 #endif
1823 #ifdef CONFIG_BLK_DEV_DTC2278
1824 if (probe_dtc2278)
1825 (void)dtc2278_init();
1826 #endif
1827 #ifdef CONFIG_BLK_DEV_HT6560B
1828 if (probe_ht6560b)
1829 (void)ht6560b_init();
1830 #endif
1831 #ifdef CONFIG_BLK_DEV_QD65XX
1832 if (probe_qd65xx)
1833 (void)qd65xx_init();
1834 #endif
1835
1836 /* Probe for special PCI and other "known" interface chipsets. */
1837 probe_for_hwifs();
1838
1839 return 0;
1840 }
1841
1842 #ifdef MODULE
1843 static char *options = NULL;
1844 module_param(options, charp, 0);
1845 MODULE_LICENSE("GPL");
1846
1847 static void __init parse_options (char *line)
1848 {
1849 char *next = line;
1850
1851 if (line == NULL || !*line)
1852 return;
1853 while ((line = next) != NULL) {
1854 if ((next = strchr(line,' ')) != NULL)
1855 *next++ = 0;
1856 if (!ide_setup(line))
1857 printk (KERN_INFO "Unknown option '%s'\n", line);
1858 }
1859 }
1860
1861 int __init init_module (void)
1862 {
1863 parse_options(options);
1864 return ide_init();
1865 }
1866
1867 void __exit cleanup_module (void)
1868 {
1869 int index;
1870
1871 for (index = 0; index < MAX_HWIFS; ++index)
1872 ide_unregister(index);
1873
1874 #ifdef CONFIG_BLK_DEV_IDEPNP
1875 pnpide_exit();
1876 #endif
1877
1878 proc_ide_destroy();
1879
1880 bus_unregister(&ide_bus_type);
1881 }
1882
1883 #else /* !MODULE */
1884
1885 __setup("", ide_setup);
1886
1887 module_init(ide_init);
1888
1889 #endif /* MODULE */
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