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Linux 2.6.20.7
[linux/fpc-iii.git] / drivers / ide / ide.c
blob8e73fe52e21ec51426150ea0fa18bb954c6ca287
1 /*
2 * linux/drivers/ide/ide.c Version 7.00beta2 Mar 05 2003
3 *
4 * Copyright (C) 1994-1998 Linus Torvalds & authors (see below)
5 */
6
7 /*
8 * Mostly written by Mark Lord <mlord@pobox.com>
9 * and Gadi Oxman <gadio@netvision.net.il>
10 * and Andre Hedrick <andre@linux-ide.org>
11 *
12 * See linux/MAINTAINERS for address of current maintainer.
13 *
14 * This is the multiple IDE interface driver, as evolved from hd.c.
15 * It supports up to MAX_HWIFS IDE interfaces, on one or more IRQs
16 * (usually 14 & 15).
17 * There can be up to two drives per interface, as per the ATA-2 spec.
18 *
19 * Primary: ide0, port 0x1f0; major=3; hda is minor=0; hdb is minor=64
20 * Secondary: ide1, port 0x170; major=22; hdc is minor=0; hdd is minor=64
21 * Tertiary: ide2, port 0x???; major=33; hde is minor=0; hdf is minor=64
22 * Quaternary: ide3, port 0x???; major=34; hdg is minor=0; hdh is minor=64
23 * ...
24 *
25 * From hd.c:
26 * |
27 * | It traverses the request-list, using interrupts to jump between functions.
28 * | As nearly all functions can be called within interrupts, we may not sleep.
29 * | Special care is recommended. Have Fun!
30 * |
31 * | modified by Drew Eckhardt to check nr of hd's from the CMOS.
32 * |
33 * | Thanks to Branko Lankester, lankeste@fwi.uva.nl, who found a bug
34 * | in the early extended-partition checks and added DM partitions.
35 * |
36 * | Early work on error handling by Mika Liljeberg (liljeber@cs.Helsinki.FI).
37 * |
38 * | IRQ-unmask, drive-id, multiple-mode, support for ">16 heads",
39 * | and general streamlining by Mark Lord (mlord@pobox.com).
40 *
41 * October, 1994 -- Complete line-by-line overhaul for linux 1.1.x, by:
42 *
43 * Mark Lord (mlord@pobox.com) (IDE Perf.Pkg)
44 * Delman Lee (delman@ieee.org) ("Mr. atdisk2")
45 * Scott Snyder (snyder@fnald0.fnal.gov) (ATAPI IDE cd-rom)
46 *
47 * This was a rewrite of just about everything from hd.c, though some original
48 * code is still sprinkled about. Think of it as a major evolution, with
49 * inspiration from lots of linux users, esp. hamish@zot.apana.org.au
50 *
51 * Version 1.0 ALPHA initial code, primary i/f working okay
52 * Version 1.3 BETA dual i/f on shared irq tested & working!
53 * Version 1.4 BETA added auto probing for irq(s)
54 * Version 1.5 BETA added ALPHA (untested) support for IDE cd-roms,
55 * ...
56 * Version 5.50 allow values as small as 20 for idebus=
57 * Version 5.51 force non io_32bit in drive_cmd_intr()
58 * change delay_10ms() to delay_50ms() to fix problems
59 * Version 5.52 fix incorrect invalidation of removable devices
60 * add "hdx=slow" command line option
61 * Version 5.60 start to modularize the driver; the disk and ATAPI
62 * drivers can be compiled as loadable modules.
63 * move IDE probe code to ide-probe.c
64 * move IDE disk code to ide-disk.c
65 * add support for generic IDE device subdrivers
66 * add m68k code from Geert Uytterhoeven
67 * probe all interfaces by default
68 * add ioctl to (re)probe an interface
69 * Version 6.00 use per device request queues
70 * attempt to optimize shared hwgroup performance
71 * add ioctl to manually adjust bandwidth algorithms
72 * add kerneld support for the probe module
73 * fix bug in ide_error()
74 * fix bug in the first ide_get_lock() call for Atari
75 * don't flush leftover data for ATAPI devices
76 * Version 6.01 clear hwgroup->active while the hwgroup sleeps
77 * support HDIO_GETGEO for floppies
78 * Version 6.02 fix ide_ack_intr() call
79 * check partition table on floppies
80 * Version 6.03 handle bad status bit sequencing in ide_wait_stat()
81 * Version 6.10 deleted old entries from this list of updates
82 * replaced triton.c with ide-dma.c generic PCI DMA
83 * added support for BIOS-enabled UltraDMA
84 * rename all "promise" things to "pdc4030"
85 * fix EZ-DRIVE handling on small disks
86 * Version 6.11 fix probe error in ide_scan_devices()
87 * fix ancient "jiffies" polling bugs
88 * mask all hwgroup interrupts on each irq entry
89 * Version 6.12 integrate ioctl and proc interfaces
90 * fix parsing of "idex=" command line parameter
91 * Version 6.13 add support for ide4/ide5 courtesy rjones@orchestream.com
92 * Version 6.14 fixed IRQ sharing among PCI devices
93 * Version 6.15 added SMP awareness to IDE drivers
94 * Version 6.16 fixed various bugs; even more SMP friendly
95 * Version 6.17 fix for newest EZ-Drive problem
96 * Version 6.18 default unpartitioned-disk translation now "BIOS LBA"
97 * Version 6.19 Re-design for a UNIFORM driver for all platforms,
98 * model based on suggestions from Russell King and
99 * Geert Uytterhoeven
100 * Promise DC4030VL now supported.
101 * add support for ide6/ide7
102 * delay_50ms() changed to ide_delay_50ms() and exported.
103 * Version 6.20 Added/Fixed Generic ATA-66 support and hwif detection.
104 * Added hdx=flash to allow for second flash disk
105 * detection w/o the hang loop.
106 * Added support for ide8/ide9
107 * Added idex=ata66 for the quirky chipsets that are
108 * ATA-66 compliant, but have yet to determine a method
109 * of verification of the 80c cable presence.
110 * Specifically Promise's PDC20262 chipset.
111 * Version 6.21 Fixing/Fixed SMP spinlock issue with insight from an old
112 * hat that clarified original low level driver design.
113 * Version 6.30 Added SMP support; fixed multmode issues. -ml
114 * Version 6.31 Debug Share INTR's and request queue streaming
115 * Native ATA-100 support
116 * Prep for Cascades Project
117 * Version 7.00alpha First named revision of ide rearrange
118 *
119 * Some additional driver compile-time options are in ./include/linux/ide.h
120 *
121 * To do, in likely order of completion:
122 * - modify kernel to obtain BIOS geometry for drives on 2nd/3rd/4th i/f
123 *
124 */
125
126 #define REVISION "Revision: 7.00alpha2"
127 #define VERSION "Id: ide.c 7.00a2 20020906"
128
129 #undef REALLY_SLOW_IO /* most systems can safely undef this */
130
131 #define _IDE_C /* Tell ide.h it's really us */
132
133 #include <linux/module.h>
134 #include <linux/types.h>
135 #include <linux/string.h>
136 #include <linux/kernel.h>
137 #include <linux/timer.h>
138 #include <linux/mm.h>
139 #include <linux/interrupt.h>
140 #include <linux/major.h>
141 #include <linux/errno.h>
142 #include <linux/genhd.h>
143 #include <linux/blkpg.h>
144 #include <linux/slab.h>
145 #include <linux/init.h>
146 #include <linux/pci.h>
147 #include <linux/delay.h>
148 #include <linux/ide.h>
149 #include <linux/completion.h>
150 #include <linux/reboot.h>
151 #include <linux/cdrom.h>
152 #include <linux/seq_file.h>
153 #include <linux/device.h>
154 #include <linux/bitops.h>
155
156 #include <asm/byteorder.h>
157 #include <asm/irq.h>
158 #include <asm/uaccess.h>
159 #include <asm/io.h>
160
161
162 /* default maximum number of failures */
163 #define IDE_DEFAULT_MAX_FAILURES 1
164
165 static const u8 ide_hwif_to_major[] = { IDE0_MAJOR, IDE1_MAJOR,
166 IDE2_MAJOR, IDE3_MAJOR,
167 IDE4_MAJOR, IDE5_MAJOR,
168 IDE6_MAJOR, IDE7_MAJOR,
169 IDE8_MAJOR, IDE9_MAJOR };
170
171 static int idebus_parameter; /* holds the "idebus=" parameter */
172 static int system_bus_speed; /* holds what we think is VESA/PCI bus speed */
173 static int initializing; /* set while initializing built-in drivers */
174
175 DECLARE_MUTEX(ide_cfg_sem);
176 __cacheline_aligned_in_smp DEFINE_SPINLOCK(ide_lock);
177
178 #ifdef CONFIG_BLK_DEV_IDEPCI
179 static int ide_scan_direction; /* THIS was formerly 2.2.x pci=reverse */
180 #endif
181
182 #ifdef CONFIG_IDEDMA_AUTO
183 int noautodma = 0;
184 #else
185 int noautodma = 1;
186 #endif
187
188 EXPORT_SYMBOL(noautodma);
189
190 /*
191 * This is declared extern in ide.h, for access by other IDE modules:
192 */
193 ide_hwif_t ide_hwifs[MAX_HWIFS]; /* master data repository */
194
195 EXPORT_SYMBOL(ide_hwifs);
196
197 /*
198 * Do not even *think* about calling this!
199 */
200 static void init_hwif_data(ide_hwif_t *hwif, unsigned int index)
201 {
202 unsigned int unit;
203
204 /* bulk initialize hwif & drive info with zeros */
205 memset(hwif, 0, sizeof(ide_hwif_t));
206
207 /* fill in any non-zero initial values */
208 hwif->index = index;
209 hwif->major = ide_hwif_to_major[index];
210
211 hwif->name[0] = 'i';
212 hwif->name[1] = 'd';
213 hwif->name[2] = 'e';
214 hwif->name[3] = '0' + index;
215
216 hwif->bus_state = BUSSTATE_ON;
217
218 hwif->atapi_dma = 0; /* disable all atapi dma */
219 hwif->ultra_mask = 0x80; /* disable all ultra */
220 hwif->mwdma_mask = 0x80; /* disable all mwdma */
221 hwif->swdma_mask = 0x80; /* disable all swdma */
222
223 init_completion(&hwif->gendev_rel_comp);
224
225 default_hwif_iops(hwif);
226 default_hwif_transport(hwif);
227 for (unit = 0; unit < MAX_DRIVES; ++unit) {
228 ide_drive_t *drive = &hwif->drives[unit];
229
230 drive->media = ide_disk;
231 drive->select.all = (unit<<4)|0xa0;
232 drive->hwif = hwif;
233 drive->ctl = 0x08;
234 drive->ready_stat = READY_STAT;
235 drive->bad_wstat = BAD_W_STAT;
236 drive->special.b.recalibrate = 1;
237 drive->special.b.set_geometry = 1;
238 drive->name[0] = 'h';
239 drive->name[1] = 'd';
240 drive->name[2] = 'a' + (index * MAX_DRIVES) + unit;
241 drive->max_failures = IDE_DEFAULT_MAX_FAILURES;
242 drive->using_dma = 0;
243 drive->vdma = 0;
244 INIT_LIST_HEAD(&drive->list);
245 init_completion(&drive->gendev_rel_comp);
246 }
247 }
248
249 static void init_hwif_default(ide_hwif_t *hwif, unsigned int index)
250 {
251 hw_regs_t hw;
252
253 memset(&hw, 0, sizeof(hw_regs_t));
254
255 ide_init_hwif_ports(&hw, ide_default_io_base(index), 0, &hwif->irq);
256
257 memcpy(&hwif->hw, &hw, sizeof(hw));
258 memcpy(hwif->io_ports, hw.io_ports, sizeof(hw.io_ports));
259
260 hwif->noprobe = !hwif->io_ports[IDE_DATA_OFFSET];
261 #ifdef CONFIG_BLK_DEV_HD
262 if (hwif->io_ports[IDE_DATA_OFFSET] == HD_DATA)
263 hwif->noprobe = 1; /* may be overridden by ide_setup() */
264 #endif
265 }
266
267 extern void ide_arm_init(void);
268
269 /*
270 * init_ide_data() sets reasonable default values into all fields
271 * of all instances of the hwifs and drives, but only on the first call.
272 * Subsequent calls have no effect (they don't wipe out anything).
273 *
274 * This routine is normally called at driver initialization time,
275 * but may also be called MUCH earlier during kernel "command-line"
276 * parameter processing. As such, we cannot depend on any other parts
277 * of the kernel (such as memory allocation) to be functioning yet.
278 *
279 * This is too bad, as otherwise we could dynamically allocate the
280 * ide_drive_t structs as needed, rather than always consuming memory
281 * for the max possible number (MAX_HWIFS * MAX_DRIVES) of them.
282 *
283 * FIXME: We should stuff the setup data into __init and copy the
284 * relevant hwifs/allocate them properly during boot.
285 */
286 #define MAGIC_COOKIE 0x12345678
287 static void __init init_ide_data (void)
288 {
289 ide_hwif_t *hwif;
290 unsigned int index;
291 static unsigned long magic_cookie = MAGIC_COOKIE;
292
293 if (magic_cookie != MAGIC_COOKIE)
294 return; /* already initialized */
295 magic_cookie = 0;
296
297 /* Initialise all interface structures */
298 for (index = 0; index < MAX_HWIFS; ++index) {
299 hwif = &ide_hwifs[index];
300 init_hwif_data(hwif, index);
301 init_hwif_default(hwif, index);
302 #if !defined(CONFIG_PPC32) || !defined(CONFIG_PCI)
303 hwif->irq = hwif->hw.irq =
304 ide_init_default_irq(hwif->io_ports[IDE_DATA_OFFSET]);
305 #endif
306 }
307 #ifdef CONFIG_IDE_ARM
308 initializing = 1;
309 ide_arm_init();
310 initializing = 0;
311 #endif
312 }
313
314 /**
315 * ide_system_bus_speed - guess bus speed
316 *
317 * ide_system_bus_speed() returns what we think is the system VESA/PCI
318 * bus speed (in MHz). This is used for calculating interface PIO timings.
319 * The default is 40 for known PCI systems, 50 otherwise.
320 * The "idebus=xx" parameter can be used to override this value.
321 * The actual value to be used is computed/displayed the first time
322 * through. Drivers should only use this as a last resort.
323 *
324 * Returns a guessed speed in MHz.
325 */
326
327 static int ide_system_bus_speed(void)
328 {
329 #ifdef CONFIG_PCI
330 static struct pci_device_id pci_default[] = {
331 { PCI_DEVICE(PCI_ANY_ID, PCI_ANY_ID) },
332 { }
333 };
334 #else
335 #define pci_default 0
336 #endif /* CONFIG_PCI */
337
338 if (!system_bus_speed) {
339 if (idebus_parameter) {
340 /* user supplied value */
341 system_bus_speed = idebus_parameter;
342 } else if (pci_dev_present(pci_default)) {
343 /* safe default value for PCI */
344 system_bus_speed = 33;
345 } else {
346 /* safe default value for VESA and PCI */
347 system_bus_speed = 50;
348 }
349 printk(KERN_INFO "ide: Assuming %dMHz system bus speed "
350 "for PIO modes%s\n", system_bus_speed,
351 idebus_parameter ? "" : "; override with idebus=xx");
352 }
353 return system_bus_speed;
354 }
355
356 #ifdef CONFIG_PROC_FS
357 struct proc_dir_entry *proc_ide_root;
358 #endif
359
360 static struct resource* hwif_request_region(ide_hwif_t *hwif,
361 unsigned long addr, int num)
362 {
363 struct resource *res = request_region(addr, num, hwif->name);
364
365 if (!res)
366 printk(KERN_ERR "%s: I/O resource 0x%lX-0x%lX not free.\n",
367 hwif->name, addr, addr+num-1);
368 return res;
369 }
370
371 /**
372 * ide_hwif_request_regions - request resources for IDE
373 * @hwif: interface to use
374 *
375 * Requests all the needed resources for an interface.
376 * Right now core IDE code does this work which is deeply wrong.
377 * MMIO leaves it to the controller driver,
378 * PIO will migrate this way over time.
379 */
380
381 int ide_hwif_request_regions(ide_hwif_t *hwif)
382 {
383 unsigned long addr;
384 unsigned int i;
385
386 if (hwif->mmio == 2)
387 return 0;
388 BUG_ON(hwif->mmio == 1);
389 addr = hwif->io_ports[IDE_CONTROL_OFFSET];
390 if (addr && !hwif_request_region(hwif, addr, 1))
391 goto control_region_busy;
392 hwif->straight8 = 0;
393 addr = hwif->io_ports[IDE_DATA_OFFSET];
394 if ((addr | 7) == hwif->io_ports[IDE_STATUS_OFFSET]) {
395 if (!hwif_request_region(hwif, addr, 8))
396 goto data_region_busy;
397 hwif->straight8 = 1;
398 return 0;
399 }
400 for (i = IDE_DATA_OFFSET; i <= IDE_STATUS_OFFSET; i++) {
401 addr = hwif->io_ports[i];
402 if (!hwif_request_region(hwif, addr, 1)) {
403 while (--i)
404 release_region(addr, 1);
405 goto data_region_busy;
406 }
407 }
408 return 0;
409
410 data_region_busy:
411 addr = hwif->io_ports[IDE_CONTROL_OFFSET];
412 if (addr)
413 release_region(addr, 1);
414 control_region_busy:
415 /* If any errors are return, we drop the hwif interface. */
416 return -EBUSY;
417 }
418
419 /**
420 * ide_hwif_release_regions - free IDE resources
421 *
422 * Note that we only release the standard ports,
423 * and do not even try to handle any extra ports
424 * allocated for weird IDE interface chipsets.
425 *
426 * Note also that we don't yet handle mmio resources here. More
427 * importantly our caller should be doing this so we need to
428 * restructure this as a helper function for drivers.
429 */
430
431 void ide_hwif_release_regions(ide_hwif_t *hwif)
432 {
433 u32 i = 0;
434
435 if (hwif->mmio == 2)
436 return;
437 if (hwif->io_ports[IDE_CONTROL_OFFSET])
438 release_region(hwif->io_ports[IDE_CONTROL_OFFSET], 1);
439 if (hwif->straight8) {
440 release_region(hwif->io_ports[IDE_DATA_OFFSET], 8);
441 return;
442 }
443 for (i = IDE_DATA_OFFSET; i <= IDE_STATUS_OFFSET; i++)
444 if (hwif->io_ports[i])
445 release_region(hwif->io_ports[i], 1);
446 }
447
448 /**
449 * ide_hwif_restore - restore hwif to template
450 * @hwif: hwif to update
451 * @tmp_hwif: template
452 *
453 * Restore hwif to a previous state by copying most settings
454 * from the template.
455 */
456
457 static void ide_hwif_restore(ide_hwif_t *hwif, ide_hwif_t *tmp_hwif)
458 {
459 hwif->hwgroup = tmp_hwif->hwgroup;
460
461 hwif->gendev.parent = tmp_hwif->gendev.parent;
462
463 hwif->proc = tmp_hwif->proc;
464
465 hwif->major = tmp_hwif->major;
466 hwif->straight8 = tmp_hwif->straight8;
467 hwif->bus_state = tmp_hwif->bus_state;
468
469 hwif->atapi_dma = tmp_hwif->atapi_dma;
470 hwif->ultra_mask = tmp_hwif->ultra_mask;
471 hwif->mwdma_mask = tmp_hwif->mwdma_mask;
472 hwif->swdma_mask = tmp_hwif->swdma_mask;
473
474 hwif->chipset = tmp_hwif->chipset;
475 hwif->hold = tmp_hwif->hold;
476
477 #ifdef CONFIG_BLK_DEV_IDEPCI
478 hwif->pci_dev = tmp_hwif->pci_dev;
479 hwif->cds = tmp_hwif->cds;
480 #endif
481
482 hwif->tuneproc = tmp_hwif->tuneproc;
483 hwif->speedproc = tmp_hwif->speedproc;
484 hwif->selectproc = tmp_hwif->selectproc;
485 hwif->reset_poll = tmp_hwif->reset_poll;
486 hwif->pre_reset = tmp_hwif->pre_reset;
487 hwif->resetproc = tmp_hwif->resetproc;
488 hwif->intrproc = tmp_hwif->intrproc;
489 hwif->maskproc = tmp_hwif->maskproc;
490 hwif->quirkproc = tmp_hwif->quirkproc;
491 hwif->busproc = tmp_hwif->busproc;
492
493 hwif->ata_input_data = tmp_hwif->ata_input_data;
494 hwif->ata_output_data = tmp_hwif->ata_output_data;
495 hwif->atapi_input_bytes = tmp_hwif->atapi_input_bytes;
496 hwif->atapi_output_bytes = tmp_hwif->atapi_output_bytes;
497
498 hwif->dma_setup = tmp_hwif->dma_setup;
499 hwif->dma_exec_cmd = tmp_hwif->dma_exec_cmd;
500 hwif->dma_start = tmp_hwif->dma_start;
501 hwif->ide_dma_end = tmp_hwif->ide_dma_end;
502 hwif->ide_dma_check = tmp_hwif->ide_dma_check;
503 hwif->ide_dma_on = tmp_hwif->ide_dma_on;
504 hwif->ide_dma_off_quietly = tmp_hwif->ide_dma_off_quietly;
505 hwif->ide_dma_test_irq = tmp_hwif->ide_dma_test_irq;
506 hwif->ide_dma_clear_irq = tmp_hwif->ide_dma_clear_irq;
507 hwif->ide_dma_host_on = tmp_hwif->ide_dma_host_on;
508 hwif->ide_dma_host_off = tmp_hwif->ide_dma_host_off;
509 hwif->ide_dma_lostirq = tmp_hwif->ide_dma_lostirq;
510 hwif->ide_dma_timeout = tmp_hwif->ide_dma_timeout;
511
512 hwif->OUTB = tmp_hwif->OUTB;
513 hwif->OUTBSYNC = tmp_hwif->OUTBSYNC;
514 hwif->OUTW = tmp_hwif->OUTW;
515 hwif->OUTL = tmp_hwif->OUTL;
516 hwif->OUTSW = tmp_hwif->OUTSW;
517 hwif->OUTSL = tmp_hwif->OUTSL;
518
519 hwif->INB = tmp_hwif->INB;
520 hwif->INW = tmp_hwif->INW;
521 hwif->INL = tmp_hwif->INL;
522 hwif->INSW = tmp_hwif->INSW;
523 hwif->INSL = tmp_hwif->INSL;
524
525 hwif->sg_max_nents = tmp_hwif->sg_max_nents;
526
527 hwif->mmio = tmp_hwif->mmio;
528 hwif->rqsize = tmp_hwif->rqsize;
529 hwif->no_lba48 = tmp_hwif->no_lba48;
530
531 #ifndef CONFIG_BLK_DEV_IDECS
532 hwif->irq = tmp_hwif->irq;
533 #endif
534
535 hwif->dma_base = tmp_hwif->dma_base;
536 hwif->dma_master = tmp_hwif->dma_master;
537 hwif->dma_command = tmp_hwif->dma_command;
538 hwif->dma_vendor1 = tmp_hwif->dma_vendor1;
539 hwif->dma_status = tmp_hwif->dma_status;
540 hwif->dma_vendor3 = tmp_hwif->dma_vendor3;
541 hwif->dma_prdtable = tmp_hwif->dma_prdtable;
542
543 hwif->config_data = tmp_hwif->config_data;
544 hwif->select_data = tmp_hwif->select_data;
545 hwif->extra_base = tmp_hwif->extra_base;
546 hwif->extra_ports = tmp_hwif->extra_ports;
547 hwif->autodma = tmp_hwif->autodma;
548 hwif->udma_four = tmp_hwif->udma_four;
549 hwif->no_dsc = tmp_hwif->no_dsc;
550
551 hwif->hwif_data = tmp_hwif->hwif_data;
552 }
553
554 /**
555 * ide_unregister - free an IDE interface
556 * @index: index of interface (will change soon to a pointer)
557 *
558 * Perform the final unregister of an IDE interface. At the moment
559 * we don't refcount interfaces so this will also get split up.
560 *
561 * Locking:
562 * The caller must not hold the IDE locks
563 * The drive present/vanishing is not yet properly locked
564 * Take care with the callbacks. These have been split to avoid
565 * deadlocking the IDE layer. The shutdown callback is called
566 * before we take the lock and free resources. It is up to the
567 * caller to be sure there is no pending I/O here, and that
568 * the interface will not be reopened (present/vanishing locking
569 * isn't yet done BTW). After we commit to the final kill we
570 * call the cleanup callback with the ide locks held.
571 *
572 * Unregister restores the hwif structures to the default state.
573 * This is raving bonkers.
574 */
575
576 void ide_unregister(unsigned int index)
577 {
578 ide_drive_t *drive;
579 ide_hwif_t *hwif, *g;
580 static ide_hwif_t tmp_hwif; /* protected by ide_cfg_sem */
581 ide_hwgroup_t *hwgroup;
582 int irq_count = 0, unit;
583
584 BUG_ON(index >= MAX_HWIFS);
585
586 BUG_ON(in_interrupt());
587 BUG_ON(irqs_disabled());
588 down(&ide_cfg_sem);
589 spin_lock_irq(&ide_lock);
590 hwif = &ide_hwifs[index];
591 if (!hwif->present)
592 goto abort;
593 for (unit = 0; unit < MAX_DRIVES; ++unit) {
594 drive = &hwif->drives[unit];
595 if (!drive->present)
596 continue;
597 spin_unlock_irq(&ide_lock);
598 device_unregister(&drive->gendev);
599 wait_for_completion(&drive->gendev_rel_comp);
600 spin_lock_irq(&ide_lock);
601 }
602 hwif->present = 0;
603
604 spin_unlock_irq(&ide_lock);
605
606 destroy_proc_ide_interface(hwif);
607
608 hwgroup = hwif->hwgroup;
609 /*
610 * free the irq if we were the only hwif using it
611 */
612 g = hwgroup->hwif;
613 do {
614 if (g->irq == hwif->irq)
615 ++irq_count;
616 g = g->next;
617 } while (g != hwgroup->hwif);
618 if (irq_count == 1)
619 free_irq(hwif->irq, hwgroup);
620
621 spin_lock_irq(&ide_lock);
622 /*
623 * Note that we only release the standard ports,
624 * and do not even try to handle any extra ports
625 * allocated for weird IDE interface chipsets.
626 */
627 ide_hwif_release_regions(hwif);
628
629 /*
630 * Remove us from the hwgroup, and free
631 * the hwgroup if we were the only member
632 */
633 if (hwif->next == hwif) {
634 BUG_ON(hwgroup->hwif != hwif);
635 kfree(hwgroup);
636 } else {
637 /* There is another interface in hwgroup.
638 * Unlink us, and set hwgroup->drive and ->hwif to
639 * something sane.
640 */
641 g = hwgroup->hwif;
642 while (g->next != hwif)
643 g = g->next;
644 g->next = hwif->next;
645 if (hwgroup->hwif == hwif) {
646 /* Chose a random hwif for hwgroup->hwif.
647 * It's guaranteed that there are no drives
648 * left in the hwgroup.
649 */
650 BUG_ON(hwgroup->drive != NULL);
651 hwgroup->hwif = g;
652 }
653 BUG_ON(hwgroup->hwif == hwif);
654 }
655
656 /* More messed up locking ... */
657 spin_unlock_irq(&ide_lock);
658 device_unregister(&hwif->gendev);
659 wait_for_completion(&hwif->gendev_rel_comp);
660
661 /*
662 * Remove us from the kernel's knowledge
663 */
664 blk_unregister_region(MKDEV(hwif->major, 0), MAX_DRIVES<<PARTN_BITS);
665 kfree(hwif->sg_table);
666 unregister_blkdev(hwif->major, hwif->name);
667 spin_lock_irq(&ide_lock);
668
669 if (hwif->dma_base) {
670 (void) ide_release_dma(hwif);
671
672 hwif->dma_base = 0;
673 hwif->dma_master = 0;
674 hwif->dma_command = 0;
675 hwif->dma_vendor1 = 0;
676 hwif->dma_status = 0;
677 hwif->dma_vendor3 = 0;
678 hwif->dma_prdtable = 0;
679
680 hwif->extra_base = 0;
681 hwif->extra_ports = 0;
682 }
683
684 /* copy original settings */
685 tmp_hwif = *hwif;
686
687 /* restore hwif data to pristine status */
688 init_hwif_data(hwif, index);
689 init_hwif_default(hwif, index);
690
691 ide_hwif_restore(hwif, &tmp_hwif);
692
693 abort:
694 spin_unlock_irq(&ide_lock);
695 up(&ide_cfg_sem);
696 }
697
698 EXPORT_SYMBOL(ide_unregister);
699
700
701 /**
702 * ide_setup_ports - set up IDE interface ports
703 * @hw: register descriptions
704 * @base: base register
705 * @offsets: table of register offsets
706 * @ctrl: control register
707 * @ack_irq: IRQ ack
708 * @irq: interrupt lie
709 *
710 * Setup hw_regs_t structure described by parameters. You
711 * may set up the hw structure yourself OR use this routine to
712 * do it for you. This is basically a helper
713 *
714 */
715
716 void ide_setup_ports ( hw_regs_t *hw,
717 unsigned long base, int *offsets,
718 unsigned long ctrl, unsigned long intr,
719 ide_ack_intr_t *ack_intr,
720 /*
721 * ide_io_ops_t *iops,
722 */
723 int irq)
724 {
725 int i;
726
727 memset(hw, 0, sizeof(hw_regs_t));
728 for (i = 0; i < IDE_NR_PORTS; i++) {
729 if (offsets[i] == -1) {
730 switch(i) {
731 case IDE_CONTROL_OFFSET:
732 hw->io_ports[i] = ctrl;
733 break;
734 #if defined(CONFIG_AMIGA) || defined(CONFIG_MAC)
735 case IDE_IRQ_OFFSET:
736 hw->io_ports[i] = intr;
737 break;
738 #endif /* (CONFIG_AMIGA) || (CONFIG_MAC) */
739 default:
740 hw->io_ports[i] = 0;
741 break;
742 }
743 } else {
744 hw->io_ports[i] = base + offsets[i];
745 }
746 }
747 hw->irq = irq;
748 hw->dma = NO_DMA;
749 hw->ack_intr = ack_intr;
750 /*
751 * hw->iops = iops;
752 */
753 }
754
755 /**
756 * ide_register_hw_with_fixup - register IDE interface
757 * @hw: hardware registers
758 * @hwifp: pointer to returned hwif
759 * @fixup: fixup function
760 *
761 * Register an IDE interface, specifying exactly the registers etc.
762 * Set init=1 iff calling before probes have taken place.
763 *
764 * Returns -1 on error.
765 */
766
767 int ide_register_hw_with_fixup(hw_regs_t *hw, ide_hwif_t **hwifp, void(*fixup)(ide_hwif_t *hwif))
768 {
769 int index, retry = 1;
770 ide_hwif_t *hwif;
771
772 do {
773 for (index = 0; index < MAX_HWIFS; ++index) {
774 hwif = &ide_hwifs[index];
775 if (hwif->hw.io_ports[IDE_DATA_OFFSET] == hw->io_ports[IDE_DATA_OFFSET])
776 goto found;
777 }
778 for (index = 0; index < MAX_HWIFS; ++index) {
779 hwif = &ide_hwifs[index];
780 if (hwif->hold)
781 continue;
782 if ((!hwif->present && !hwif->mate && !initializing) ||
783 (!hwif->hw.io_ports[IDE_DATA_OFFSET] && initializing))
784 goto found;
785 }
786 for (index = 0; index < MAX_HWIFS; index++)
787 ide_unregister(index);
788 } while (retry--);
789 return -1;
790 found:
791 if (hwif->present)
792 ide_unregister(index);
793 else if (!hwif->hold) {
794 init_hwif_data(hwif, index);
795 init_hwif_default(hwif, index);
796 }
797 if (hwif->present)
798 return -1;
799 memcpy(&hwif->hw, hw, sizeof(*hw));
800 memcpy(hwif->io_ports, hwif->hw.io_ports, sizeof(hwif->hw.io_ports));
801 hwif->irq = hw->irq;
802 hwif->noprobe = 0;
803 hwif->chipset = hw->chipset;
804 hwif->gendev.parent = hw->dev;
805
806 if (!initializing) {
807 probe_hwif_init_with_fixup(hwif, fixup);
808 create_proc_ide_interfaces();
809 }
810
811 if (hwifp)
812 *hwifp = hwif;
813
814 return (initializing || hwif->present) ? index : -1;
815 }
816
817 EXPORT_SYMBOL(ide_register_hw_with_fixup);
818
819 int ide_register_hw(hw_regs_t *hw, ide_hwif_t **hwifp)
820 {
821 return ide_register_hw_with_fixup(hw, hwifp, NULL);
822 }
823
824 EXPORT_SYMBOL(ide_register_hw);
825
826 /*
827 * Locks for IDE setting functionality
828 */
829
830 DECLARE_MUTEX(ide_setting_sem);
831
832 /**
833 * __ide_add_setting - add an ide setting option
834 * @drive: drive to use
835 * @name: setting name
836 * @rw: true if the function is read write
837 * @read_ioctl: function to call on read
838 * @write_ioctl: function to call on write
839 * @data_type: type of data
840 * @min: range minimum
841 * @max: range maximum
842 * @mul_factor: multiplication scale
843 * @div_factor: divison scale
844 * @data: private data field
845 * @set: setting
846 * @auto_remove: setting auto removal flag
847 *
848 * Removes the setting named from the device if it is present.
849 * The function takes the settings_lock to protect against
850 * parallel changes. This function must not be called from IRQ
851 * context. Returns 0 on success or -1 on failure.
852 *
853 * BUGS: This code is seriously over-engineered. There is also
854 * magic about how the driver specific features are setup. If
855 * a driver is attached we assume the driver settings are auto
856 * remove.
857 */
858
859 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)
860 {
861 ide_settings_t **p = (ide_settings_t **) &drive->settings, *setting = NULL;
862
863 down(&ide_setting_sem);
864 while ((*p) && strcmp((*p)->name, name) < 0)
865 p = &((*p)->next);
866 if ((setting = kzalloc(sizeof(*setting), GFP_KERNEL)) == NULL)
867 goto abort;
868 if ((setting->name = kmalloc(strlen(name) + 1, GFP_KERNEL)) == NULL)
869 goto abort;
870 strcpy(setting->name, name);
871 setting->rw = rw;
872 setting->read_ioctl = read_ioctl;
873 setting->write_ioctl = write_ioctl;
874 setting->data_type = data_type;
875 setting->min = min;
876 setting->max = max;
877 setting->mul_factor = mul_factor;
878 setting->div_factor = div_factor;
879 setting->data = data;
880 setting->set = set;
881
882 setting->next = *p;
883 if (auto_remove)
884 setting->auto_remove = 1;
885 *p = setting;
886 up(&ide_setting_sem);
887 return 0;
888 abort:
889 up(&ide_setting_sem);
890 kfree(setting);
891 return -1;
892 }
893
894 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)
895 {
896 return __ide_add_setting(drive, name, rw, read_ioctl, write_ioctl, data_type, min, max, mul_factor, div_factor, data, set, 1);
897 }
898
899 EXPORT_SYMBOL(ide_add_setting);
900
901 /**
902 * __ide_remove_setting - remove an ide setting option
903 * @drive: drive to use
904 * @name: setting name
905 *
906 * Removes the setting named from the device if it is present.
907 * The caller must hold the setting semaphore.
908 */
909
910 static void __ide_remove_setting (ide_drive_t *drive, char *name)
911 {
912 ide_settings_t **p, *setting;
913
914 p = (ide_settings_t **) &drive->settings;
915
916 while ((*p) && strcmp((*p)->name, name))
917 p = &((*p)->next);
918 if ((setting = (*p)) == NULL)
919 return;
920
921 (*p) = setting->next;
922
923 kfree(setting->name);
924 kfree(setting);
925 }
926
927 /**
928 * ide_find_setting_by_ioctl - find a drive specific ioctl
929 * @drive: drive to scan
930 * @cmd: ioctl command to handle
931 *
932 * Scan's the device setting table for a matching entry and returns
933 * this or NULL if no entry is found. The caller must hold the
934 * setting semaphore
935 */
936
937 static ide_settings_t *ide_find_setting_by_ioctl (ide_drive_t *drive, int cmd)
938 {
939 ide_settings_t *setting = drive->settings;
940
941 while (setting) {
942 if (setting->read_ioctl == cmd || setting->write_ioctl == cmd)
943 break;
944 setting = setting->next;
945 }
946
947 return setting;
948 }
949
950 /**
951 * ide_find_setting_by_name - find a drive specific setting
952 * @drive: drive to scan
953 * @name: setting name
954 *
955 * Scan's the device setting table for a matching entry and returns
956 * this or NULL if no entry is found. The caller must hold the
957 * setting semaphore
958 */
959
960 ide_settings_t *ide_find_setting_by_name (ide_drive_t *drive, char *name)
961 {
962 ide_settings_t *setting = drive->settings;
963
964 while (setting) {
965 if (strcmp(setting->name, name) == 0)
966 break;
967 setting = setting->next;
968 }
969 return setting;
970 }
971
972 /**
973 * auto_remove_settings - remove driver specific settings
974 * @drive: drive
975 *
976 * Automatically remove all the driver specific settings for this
977 * drive. This function may not be called from IRQ context. The
978 * caller must hold ide_setting_sem.
979 */
980
981 static void auto_remove_settings (ide_drive_t *drive)
982 {
983 ide_settings_t *setting;
984 repeat:
985 setting = drive->settings;
986 while (setting) {
987 if (setting->auto_remove) {
988 __ide_remove_setting(drive, setting->name);
989 goto repeat;
990 }
991 setting = setting->next;
992 }
993 }
994
995 /**
996 * ide_read_setting - read an IDE setting
997 * @drive: drive to read from
998 * @setting: drive setting
999 *
1000 * Read a drive setting and return the value. The caller
1001 * must hold the ide_setting_sem when making this call.
1002 *
1003 * BUGS: the data return and error are the same return value
1004 * so an error -EINVAL and true return of the same value cannot
1005 * be told apart
1006 */
1007
1008 int ide_read_setting (ide_drive_t *drive, ide_settings_t *setting)
1009 {
1010 int val = -EINVAL;
1011 unsigned long flags;
1012
1013 if ((setting->rw & SETTING_READ)) {
1014 spin_lock_irqsave(&ide_lock, flags);
1015 switch(setting->data_type) {
1016 case TYPE_BYTE:
1017 val = *((u8 *) setting->data);
1018 break;
1019 case TYPE_SHORT:
1020 val = *((u16 *) setting->data);
1021 break;
1022 case TYPE_INT:
1023 case TYPE_INTA:
1024 val = *((u32 *) setting->data);
1025 break;
1026 }
1027 spin_unlock_irqrestore(&ide_lock, flags);
1028 }
1029 return val;
1030 }
1031
1032 /**
1033 * ide_spin_wait_hwgroup - wait for group
1034 * @drive: drive in the group
1035 *
1036 * Wait for an IDE device group to go non busy and then return
1037 * holding the ide_lock which guards the hwgroup->busy status
1038 * and right to use it.
1039 */
1040
1041 int ide_spin_wait_hwgroup (ide_drive_t *drive)
1042 {
1043 ide_hwgroup_t *hwgroup = HWGROUP(drive);
1044 unsigned long timeout = jiffies + (3 * HZ);
1045
1046 spin_lock_irq(&ide_lock);
1047
1048 while (hwgroup->busy) {
1049 unsigned long lflags;
1050 spin_unlock_irq(&ide_lock);
1051 local_irq_set(lflags);
1052 if (time_after(jiffies, timeout)) {
1053 local_irq_restore(lflags);
1054 printk(KERN_ERR "%s: channel busy\n", drive->name);
1055 return -EBUSY;
1056 }
1057 local_irq_restore(lflags);
1058 spin_lock_irq(&ide_lock);
1059 }
1060 return 0;
1061 }
1062
1063 EXPORT_SYMBOL(ide_spin_wait_hwgroup);
1064
1065 /**
1066 * ide_write_setting - read an IDE setting
1067 * @drive: drive to read from
1068 * @setting: drive setting
1069 * @val: value
1070 *
1071 * Write a drive setting if it is possible. The caller
1072 * must hold the ide_setting_sem when making this call.
1073 *
1074 * BUGS: the data return and error are the same return value
1075 * so an error -EINVAL and true return of the same value cannot
1076 * be told apart
1077 *
1078 * FIXME: This should be changed to enqueue a special request
1079 * to the driver to change settings, and then wait on a sema for completion.
1080 * The current scheme of polling is kludgy, though safe enough.
1081 */
1082
1083 int ide_write_setting (ide_drive_t *drive, ide_settings_t *setting, int val)
1084 {
1085 int i;
1086 u32 *p;
1087
1088 if (!capable(CAP_SYS_ADMIN))
1089 return -EACCES;
1090 if (!(setting->rw & SETTING_WRITE))
1091 return -EPERM;
1092 if (val < setting->min || val > setting->max)
1093 return -EINVAL;
1094 if (setting->set)
1095 return setting->set(drive, val);
1096 if (ide_spin_wait_hwgroup(drive))
1097 return -EBUSY;
1098 switch (setting->data_type) {
1099 case TYPE_BYTE:
1100 *((u8 *) setting->data) = val;
1101 break;
1102 case TYPE_SHORT:
1103 *((u16 *) setting->data) = val;
1104 break;
1105 case TYPE_INT:
1106 *((u32 *) setting->data) = val;
1107 break;
1108 case TYPE_INTA:
1109 p = (u32 *) setting->data;
1110 for (i = 0; i < 1 << PARTN_BITS; i++, p++)
1111 *p = val;
1112 break;
1113 }
1114 spin_unlock_irq(&ide_lock);
1115 return 0;
1116 }
1117
1118 static int set_io_32bit(ide_drive_t *drive, int arg)
1119 {
1120 drive->io_32bit = arg;
1121 #ifdef CONFIG_BLK_DEV_DTC2278
1122 if (HWIF(drive)->chipset == ide_dtc2278)
1123 HWIF(drive)->drives[!drive->select.b.unit].io_32bit = arg;
1124 #endif /* CONFIG_BLK_DEV_DTC2278 */
1125 return 0;
1126 }
1127
1128 static int set_using_dma (ide_drive_t *drive, int arg)
1129 {
1130 #ifdef CONFIG_BLK_DEV_IDEDMA
1131 if (!drive->id || !(drive->id->capability & 1))
1132 return -EPERM;
1133 if (HWIF(drive)->ide_dma_check == NULL)
1134 return -EPERM;
1135 if (arg) {
1136 if (HWIF(drive)->ide_dma_check(drive)) return -EIO;
1137 if (HWIF(drive)->ide_dma_on(drive)) return -EIO;
1138 } else {
1139 if (__ide_dma_off(drive))
1140 return -EIO;
1141 }
1142 return 0;
1143 #else
1144 return -EPERM;
1145 #endif
1146 }
1147
1148 static int set_pio_mode (ide_drive_t *drive, int arg)
1149 {
1150 struct request rq;
1151
1152 if (!HWIF(drive)->tuneproc)
1153 return -ENOSYS;
1154 if (drive->special.b.set_tune)
1155 return -EBUSY;
1156 ide_init_drive_cmd(&rq);
1157 drive->tune_req = (u8) arg;
1158 drive->special.b.set_tune = 1;
1159 (void) ide_do_drive_cmd(drive, &rq, ide_wait);
1160 return 0;
1161 }
1162
1163 static int set_xfer_rate (ide_drive_t *drive, int arg)
1164 {
1165 int err = ide_wait_cmd(drive,
1166 WIN_SETFEATURES, (u8) arg,
1167 SETFEATURES_XFER, 0, NULL);
1168
1169 if (!err && arg) {
1170 ide_set_xfer_rate(drive, (u8) arg);
1171 ide_driveid_update(drive);
1172 }
1173 return err;
1174 }
1175
1176 /**
1177 * ide_add_generic_settings - generic ide settings
1178 * @drive: drive being configured
1179 *
1180 * Add the generic parts of the system settings to the /proc files and
1181 * ioctls for this IDE device. The caller must not be holding the
1182 * ide_setting_sem.
1183 */
1184
1185 void ide_add_generic_settings (ide_drive_t *drive)
1186 {
1187 /*
1188 * drive setting name read/write access read ioctl write ioctl data type min max mul_factor div_factor data pointer set function
1189 */
1190 __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);
1191 __ide_add_setting(drive, "keepsettings", SETTING_RW, HDIO_GET_KEEPSETTINGS, HDIO_SET_KEEPSETTINGS, TYPE_BYTE, 0, 1, 1, 1, &drive->keep_settings, NULL, 0);
1192 __ide_add_setting(drive, "nice1", SETTING_RW, -1, -1, TYPE_BYTE, 0, 1, 1, 1, &drive->nice1, NULL, 0);
1193 __ide_add_setting(drive, "pio_mode", SETTING_WRITE, -1, HDIO_SET_PIO_MODE, TYPE_BYTE, 0, 255, 1, 1, NULL, set_pio_mode, 0);
1194 __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);
1195 __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);
1196 __ide_add_setting(drive, "init_speed", SETTING_RW, -1, -1, TYPE_BYTE, 0, 70, 1, 1, &drive->init_speed, NULL, 0);
1197 __ide_add_setting(drive, "current_speed", SETTING_RW, -1, -1, TYPE_BYTE, 0, 70, 1, 1, &drive->current_speed, set_xfer_rate, 0);
1198 __ide_add_setting(drive, "number", SETTING_RW, -1, -1, TYPE_BYTE, 0, 3, 1, 1, &drive->dn, NULL, 0);
1199 }
1200
1201 /**
1202 * system_bus_clock - clock guess
1203 *
1204 * External version of the bus clock guess used by very old IDE drivers
1205 * for things like VLB timings. Should not be used.
1206 */
1207
1208 int system_bus_clock (void)
1209 {
1210 return((int) ((!system_bus_speed) ? ide_system_bus_speed() : system_bus_speed ));
1211 }
1212
1213 EXPORT_SYMBOL(system_bus_clock);
1214
1215 static int generic_ide_suspend(struct device *dev, pm_message_t mesg)
1216 {
1217 ide_drive_t *drive = dev->driver_data;
1218 struct request rq;
1219 struct request_pm_state rqpm;
1220 ide_task_t args;
1221
1222 memset(&rq, 0, sizeof(rq));
1223 memset(&rqpm, 0, sizeof(rqpm));
1224 memset(&args, 0, sizeof(args));
1225 rq.cmd_type = REQ_TYPE_PM_SUSPEND;
1226 rq.special = &args;
1227 rq.data = &rqpm;
1228 rqpm.pm_step = ide_pm_state_start_suspend;
1229 if (mesg.event == PM_EVENT_PRETHAW)
1230 mesg.event = PM_EVENT_FREEZE;
1231 rqpm.pm_state = mesg.event;
1232
1233 return ide_do_drive_cmd(drive, &rq, ide_wait);
1234 }
1235
1236 static int generic_ide_resume(struct device *dev)
1237 {
1238 ide_drive_t *drive = dev->driver_data;
1239 struct request rq;
1240 struct request_pm_state rqpm;
1241 ide_task_t args;
1242
1243 memset(&rq, 0, sizeof(rq));
1244 memset(&rqpm, 0, sizeof(rqpm));
1245 memset(&args, 0, sizeof(args));
1246 rq.cmd_type = REQ_TYPE_PM_RESUME;
1247 rq.special = &args;
1248 rq.data = &rqpm;
1249 rqpm.pm_step = ide_pm_state_start_resume;
1250 rqpm.pm_state = PM_EVENT_ON;
1251
1252 return ide_do_drive_cmd(drive, &rq, ide_head_wait);
1253 }
1254
1255 int generic_ide_ioctl(ide_drive_t *drive, struct file *file, struct block_device *bdev,
1256 unsigned int cmd, unsigned long arg)
1257 {
1258 ide_settings_t *setting;
1259 ide_driver_t *drv;
1260 int err = 0;
1261 void __user *p = (void __user *)arg;
1262
1263 down(&ide_setting_sem);
1264 if ((setting = ide_find_setting_by_ioctl(drive, cmd)) != NULL) {
1265 if (cmd == setting->read_ioctl) {
1266 err = ide_read_setting(drive, setting);
1267 up(&ide_setting_sem);
1268 return err >= 0 ? put_user(err, (long __user *)arg) : err;
1269 } else {
1270 if (bdev != bdev->bd_contains)
1271 err = -EINVAL;
1272 else
1273 err = ide_write_setting(drive, setting, arg);
1274 up(&ide_setting_sem);
1275 return err;
1276 }
1277 }
1278 up(&ide_setting_sem);
1279
1280 switch (cmd) {
1281 case HDIO_OBSOLETE_IDENTITY:
1282 case HDIO_GET_IDENTITY:
1283 if (bdev != bdev->bd_contains)
1284 return -EINVAL;
1285 if (drive->id_read == 0)
1286 return -ENOMSG;
1287 if (copy_to_user(p, drive->id, (cmd == HDIO_GET_IDENTITY) ? sizeof(*drive->id) : 142))
1288 return -EFAULT;
1289 return 0;
1290
1291 case HDIO_GET_NICE:
1292 return put_user(drive->dsc_overlap << IDE_NICE_DSC_OVERLAP |
1293 drive->atapi_overlap << IDE_NICE_ATAPI_OVERLAP |
1294 drive->nice0 << IDE_NICE_0 |
1295 drive->nice1 << IDE_NICE_1 |
1296 drive->nice2 << IDE_NICE_2,
1297 (long __user *) arg);
1298
1299 #ifdef CONFIG_IDE_TASK_IOCTL
1300 case HDIO_DRIVE_TASKFILE:
1301 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
1302 return -EACCES;
1303 switch(drive->media) {
1304 case ide_disk:
1305 return ide_taskfile_ioctl(drive, cmd, arg);
1306 default:
1307 return -ENOMSG;
1308 }
1309 #endif /* CONFIG_IDE_TASK_IOCTL */
1310
1311 case HDIO_DRIVE_CMD:
1312 if (!capable(CAP_SYS_RAWIO))
1313 return -EACCES;
1314 return ide_cmd_ioctl(drive, cmd, arg);
1315
1316 case HDIO_DRIVE_TASK:
1317 if (!capable(CAP_SYS_RAWIO))
1318 return -EACCES;
1319 return ide_task_ioctl(drive, cmd, arg);
1320
1321 case HDIO_SCAN_HWIF:
1322 {
1323 hw_regs_t hw;
1324 int args[3];
1325 if (!capable(CAP_SYS_RAWIO)) return -EACCES;
1326 if (copy_from_user(args, p, 3 * sizeof(int)))
1327 return -EFAULT;
1328 memset(&hw, 0, sizeof(hw));
1329 ide_init_hwif_ports(&hw, (unsigned long) args[0],
1330 (unsigned long) args[1], NULL);
1331 hw.irq = args[2];
1332 if (ide_register_hw(&hw, NULL) == -1)
1333 return -EIO;
1334 return 0;
1335 }
1336 case HDIO_UNREGISTER_HWIF:
1337 if (!capable(CAP_SYS_RAWIO)) return -EACCES;
1338 /* (arg > MAX_HWIFS) checked in function */
1339 ide_unregister(arg);
1340 return 0;
1341 case HDIO_SET_NICE:
1342 if (!capable(CAP_SYS_ADMIN)) return -EACCES;
1343 if (arg != (arg & ((1 << IDE_NICE_DSC_OVERLAP) | (1 << IDE_NICE_1))))
1344 return -EPERM;
1345 drive->dsc_overlap = (arg >> IDE_NICE_DSC_OVERLAP) & 1;
1346 drv = *(ide_driver_t **)bdev->bd_disk->private_data;
1347 if (drive->dsc_overlap && !drv->supports_dsc_overlap) {
1348 drive->dsc_overlap = 0;
1349 return -EPERM;
1350 }
1351 drive->nice1 = (arg >> IDE_NICE_1) & 1;
1352 return 0;
1353 case HDIO_DRIVE_RESET:
1354 {
1355 unsigned long flags;
1356 if (!capable(CAP_SYS_ADMIN)) return -EACCES;
1357
1358 /*
1359 * Abort the current command on the
1360 * group if there is one, taking
1361 * care not to allow anything else
1362 * to be queued and to die on the
1363 * spot if we miss one somehow
1364 */
1365
1366 spin_lock_irqsave(&ide_lock, flags);
1367
1368 if (HWGROUP(drive)->resetting) {
1369 spin_unlock_irqrestore(&ide_lock, flags);
1370 return -EBUSY;
1371 }
1372
1373 ide_abort(drive, "drive reset");
1374
1375 BUG_ON(HWGROUP(drive)->handler);
1376
1377 /* Ensure nothing gets queued after we
1378 drop the lock. Reset will clear the busy */
1379
1380 HWGROUP(drive)->busy = 1;
1381 spin_unlock_irqrestore(&ide_lock, flags);
1382 (void) ide_do_reset(drive);
1383
1384 return 0;
1385 }
1386
1387 case CDROMEJECT:
1388 case CDROMCLOSETRAY:
1389 return scsi_cmd_ioctl(file, bdev->bd_disk, cmd, p);
1390
1391 case HDIO_GET_BUSSTATE:
1392 if (!capable(CAP_SYS_ADMIN))
1393 return -EACCES;
1394 if (put_user(HWIF(drive)->bus_state, (long __user *)arg))
1395 return -EFAULT;
1396 return 0;
1397
1398 case HDIO_SET_BUSSTATE:
1399 if (!capable(CAP_SYS_ADMIN))
1400 return -EACCES;
1401 if (HWIF(drive)->busproc)
1402 return HWIF(drive)->busproc(drive, (int)arg);
1403 return -EOPNOTSUPP;
1404 default:
1405 return -EINVAL;
1406 }
1407 }
1408
1409 EXPORT_SYMBOL(generic_ide_ioctl);
1410
1411 /*
1412 * stridx() returns the offset of c within s,
1413 * or -1 if c is '\0' or not found within s.
1414 */
1415 static int __init stridx (const char *s, char c)
1416 {
1417 char *i = strchr(s, c);
1418 return (i && c) ? i - s : -1;
1419 }
1420
1421 /*
1422 * match_parm() does parsing for ide_setup():
1423 *
1424 * 1. the first char of s must be '='.
1425 * 2. if the remainder matches one of the supplied keywords,
1426 * the index (1 based) of the keyword is negated and returned.
1427 * 3. if the remainder is a series of no more than max_vals numbers
1428 * separated by commas, the numbers are saved in vals[] and a
1429 * count of how many were saved is returned. Base10 is assumed,
1430 * and base16 is allowed when prefixed with "0x".
1431 * 4. otherwise, zero is returned.
1432 */
1433 static int __init match_parm (char *s, const char *keywords[], int vals[], int max_vals)
1434 {
1435 static const char *decimal = "0123456789";
1436 static const char *hex = "0123456789abcdef";
1437 int i, n;
1438
1439 if (*s++ == '=') {
1440 /*
1441 * Try matching against the supplied keywords,
1442 * and return -(index+1) if we match one
1443 */
1444 if (keywords != NULL) {
1445 for (i = 0; *keywords != NULL; ++i) {
1446 if (!strcmp(s, *keywords++))
1447 return -(i+1);
1448 }
1449 }
1450 /*
1451 * Look for a series of no more than "max_vals"
1452 * numeric values separated by commas, in base10,
1453 * or base16 when prefixed with "0x".
1454 * Return a count of how many were found.
1455 */
1456 for (n = 0; (i = stridx(decimal, *s)) >= 0;) {
1457 vals[n] = i;
1458 while ((i = stridx(decimal, *++s)) >= 0)
1459 vals[n] = (vals[n] * 10) + i;
1460 if (*s == 'x' && !vals[n]) {
1461 while ((i = stridx(hex, *++s)) >= 0)
1462 vals[n] = (vals[n] * 0x10) + i;
1463 }
1464 if (++n == max_vals)
1465 break;
1466 if (*s == ',' || *s == ';')
1467 ++s;
1468 }
1469 if (!*s)
1470 return n;
1471 }
1472 return 0; /* zero = nothing matched */
1473 }
1474
1475 #ifdef CONFIG_BLK_DEV_ALI14XX
1476 static int __initdata probe_ali14xx;
1477 extern int ali14xx_init(void);
1478 #endif
1479 #ifdef CONFIG_BLK_DEV_UMC8672
1480 static int __initdata probe_umc8672;
1481 extern int umc8672_init(void);
1482 #endif
1483 #ifdef CONFIG_BLK_DEV_DTC2278
1484 static int __initdata probe_dtc2278;
1485 extern int dtc2278_init(void);
1486 #endif
1487 #ifdef CONFIG_BLK_DEV_HT6560B
1488 static int __initdata probe_ht6560b;
1489 extern int ht6560b_init(void);
1490 #endif
1491 #ifdef CONFIG_BLK_DEV_QD65XX
1492 static int __initdata probe_qd65xx;
1493 extern int qd65xx_init(void);
1494 #endif
1495
1496 static int __initdata is_chipset_set[MAX_HWIFS];
1497
1498 /*
1499 * ide_setup() gets called VERY EARLY during initialization,
1500 * to handle kernel "command line" strings beginning with "hdx=" or "ide".
1501 *
1502 * Remember to update Documentation/ide.txt if you change something here.
1503 */
1504 static int __init ide_setup(char *s)
1505 {
1506 int i, vals[3];
1507 ide_hwif_t *hwif;
1508 ide_drive_t *drive;
1509 unsigned int hw, unit;
1510 const char max_drive = 'a' + ((MAX_HWIFS * MAX_DRIVES) - 1);
1511 const char max_hwif = '0' + (MAX_HWIFS - 1);
1512
1513
1514 if (strncmp(s,"hd",2) == 0 && s[2] == '=') /* hd= is for hd.c */
1515 return 0; /* driver and not us */
1516
1517 if (strncmp(s,"ide",3) && strncmp(s,"idebus",6) && strncmp(s,"hd",2))
1518 return 0;
1519
1520 printk(KERN_INFO "ide_setup: %s", s);
1521 init_ide_data ();
1522
1523 #ifdef CONFIG_BLK_DEV_IDEDOUBLER
1524 if (!strcmp(s, "ide=doubler")) {
1525 extern int ide_doubler;
1526
1527 printk(" : Enabled support for IDE doublers\n");
1528 ide_doubler = 1;
1529 return 1;
1530 }
1531 #endif /* CONFIG_BLK_DEV_IDEDOUBLER */
1532
1533 if (!strcmp(s, "ide=nodma")) {
1534 printk(" : Prevented DMA\n");
1535 noautodma = 1;
1536 return 1;
1537 }
1538
1539 #ifdef CONFIG_BLK_DEV_IDEPCI
1540 if (!strcmp(s, "ide=reverse")) {
1541 ide_scan_direction = 1;
1542 printk(" : Enabled support for IDE inverse scan order.\n");
1543 return 1;
1544 }
1545 #endif /* CONFIG_BLK_DEV_IDEPCI */
1546
1547 /*
1548 * Look for drive options: "hdx="
1549 */
1550 if (s[0] == 'h' && s[1] == 'd' && s[2] >= 'a' && s[2] <= max_drive) {
1551 const char *hd_words[] = {
1552 "none", "noprobe", "nowerr", "cdrom", "serialize",
1553 "autotune", "noautotune", "minus8", "swapdata", "bswap",
1554 "noflush", "remap", "remap63", "scsi", NULL };
1555 unit = s[2] - 'a';
1556 hw = unit / MAX_DRIVES;
1557 unit = unit % MAX_DRIVES;
1558 hwif = &ide_hwifs[hw];
1559 drive = &hwif->drives[unit];
1560 if (strncmp(s + 4, "ide-", 4) == 0) {
1561 strlcpy(drive->driver_req, s + 4, sizeof(drive->driver_req));
1562 goto done;
1563 }
1564 switch (match_parm(&s[3], hd_words, vals, 3)) {
1565 case -1: /* "none" */
1566 case -2: /* "noprobe" */
1567 drive->noprobe = 1;
1568 goto done;
1569 case -3: /* "nowerr" */
1570 drive->bad_wstat = BAD_R_STAT;
1571 hwif->noprobe = 0;
1572 goto done;
1573 case -4: /* "cdrom" */
1574 drive->present = 1;
1575 drive->media = ide_cdrom;
1576 /* an ATAPI device ignores DRDY */
1577 drive->ready_stat = 0;
1578 hwif->noprobe = 0;
1579 goto done;
1580 case -5: /* "serialize" */
1581 printk(" -- USE \"ide%d=serialize\" INSTEAD", hw);
1582 goto do_serialize;
1583 case -6: /* "autotune" */
1584 drive->autotune = IDE_TUNE_AUTO;
1585 goto obsolete_option;
1586 case -7: /* "noautotune" */
1587 drive->autotune = IDE_TUNE_NOAUTO;
1588 goto obsolete_option;
1589 case -9: /* "swapdata" */
1590 case -10: /* "bswap" */
1591 drive->bswap = 1;
1592 goto done;
1593 case -11: /* noflush */
1594 drive->noflush = 1;
1595 goto done;
1596 case -12: /* "remap" */
1597 drive->remap_0_to_1 = 1;
1598 goto done;
1599 case -13: /* "remap63" */
1600 drive->sect0 = 63;
1601 goto done;
1602 case -14: /* "scsi" */
1603 drive->scsi = 1;
1604 goto done;
1605 case 3: /* cyl,head,sect */
1606 drive->media = ide_disk;
1607 drive->ready_stat = READY_STAT;
1608 drive->cyl = drive->bios_cyl = vals[0];
1609 drive->head = drive->bios_head = vals[1];
1610 drive->sect = drive->bios_sect = vals[2];
1611 drive->present = 1;
1612 drive->forced_geom = 1;
1613 hwif->noprobe = 0;
1614 goto done;
1615 default:
1616 goto bad_option;
1617 }
1618 }
1619
1620 if (s[0] != 'i' || s[1] != 'd' || s[2] != 'e')
1621 goto bad_option;
1622 /*
1623 * Look for bus speed option: "idebus="
1624 */
1625 if (s[3] == 'b' && s[4] == 'u' && s[5] == 's') {
1626 if (match_parm(&s[6], NULL, vals, 1) != 1)
1627 goto bad_option;
1628 if (vals[0] >= 20 && vals[0] <= 66) {
1629 idebus_parameter = vals[0];
1630 } else
1631 printk(" -- BAD BUS SPEED! Expected value from 20 to 66");
1632 goto done;
1633 }
1634 /*
1635 * Look for interface options: "idex="
1636 */
1637 if (s[3] >= '0' && s[3] <= max_hwif) {
1638 /*
1639 * Be VERY CAREFUL changing this: note hardcoded indexes below
1640 * (-8, -9, -10) are reserved to ease the hardcoding.
1641 */
1642 static const char *ide_words[] = {
1643 "noprobe", "serialize", "autotune", "noautotune",
1644 "reset", "dma", "ata66", "minus8", "minus9",
1645 "minus10", "four", "qd65xx", "ht6560b", "cmd640_vlb",
1646 "dtc2278", "umc8672", "ali14xx", NULL };
1647 hw = s[3] - '0';
1648 hwif = &ide_hwifs[hw];
1649 i = match_parm(&s[4], ide_words, vals, 3);
1650
1651 /*
1652 * Cryptic check to ensure chipset not already set for hwif.
1653 * Note: we can't depend on hwif->chipset here.
1654 */
1655 if ((i >= -18 && i <= -11) || (i > 0 && i <= 3)) {
1656 /* chipset already specified */
1657 if (is_chipset_set[hw])
1658 goto bad_option;
1659 if (i > -18 && i <= -11) {
1660 /* these drivers are for "ide0=" only */
1661 if (hw != 0)
1662 goto bad_hwif;
1663 /* chipset already specified for 2nd port */
1664 if (is_chipset_set[hw+1])
1665 goto bad_option;
1666 }
1667 is_chipset_set[hw] = 1;
1668 printk("\n");
1669 }
1670
1671 switch (i) {
1672 #ifdef CONFIG_BLK_DEV_ALI14XX
1673 case -17: /* "ali14xx" */
1674 probe_ali14xx = 1;
1675 goto done;
1676 #endif
1677 #ifdef CONFIG_BLK_DEV_UMC8672
1678 case -16: /* "umc8672" */
1679 probe_umc8672 = 1;
1680 goto done;
1681 #endif
1682 #ifdef CONFIG_BLK_DEV_DTC2278
1683 case -15: /* "dtc2278" */
1684 probe_dtc2278 = 1;
1685 goto done;
1686 #endif
1687 #ifdef CONFIG_BLK_DEV_CMD640
1688 case -14: /* "cmd640_vlb" */
1689 {
1690 extern int cmd640_vlb; /* flag for cmd640.c */
1691 cmd640_vlb = 1;
1692 goto done;
1693 }
1694 #endif
1695 #ifdef CONFIG_BLK_DEV_HT6560B
1696 case -13: /* "ht6560b" */
1697 probe_ht6560b = 1;
1698 goto done;
1699 #endif
1700 #ifdef CONFIG_BLK_DEV_QD65XX
1701 case -12: /* "qd65xx" */
1702 probe_qd65xx = 1;
1703 goto done;
1704 #endif
1705 #ifdef CONFIG_BLK_DEV_4DRIVES
1706 case -11: /* "four" drives on one set of ports */
1707 {
1708 ide_hwif_t *mate = &ide_hwifs[hw^1];
1709 mate->drives[0].select.all ^= 0x20;
1710 mate->drives[1].select.all ^= 0x20;
1711 hwif->chipset = mate->chipset = ide_4drives;
1712 mate->irq = hwif->irq;
1713 memcpy(mate->io_ports, hwif->io_ports, sizeof(hwif->io_ports));
1714 goto do_serialize;
1715 }
1716 #endif /* CONFIG_BLK_DEV_4DRIVES */
1717 case -10: /* minus10 */
1718 case -9: /* minus9 */
1719 case -8: /* minus8 */
1720 goto bad_option;
1721 case -7: /* ata66 */
1722 #ifdef CONFIG_BLK_DEV_IDEPCI
1723 hwif->udma_four = 1;
1724 goto obsolete_option;
1725 #else
1726 goto bad_hwif;
1727 #endif
1728 case -6: /* dma */
1729 hwif->autodma = 1;
1730 goto obsolete_option;
1731 case -5: /* "reset" */
1732 hwif->reset = 1;
1733 goto obsolete_option;
1734 case -4: /* "noautotune" */
1735 hwif->drives[0].autotune = IDE_TUNE_NOAUTO;
1736 hwif->drives[1].autotune = IDE_TUNE_NOAUTO;
1737 goto obsolete_option;
1738 case -3: /* "autotune" */
1739 hwif->drives[0].autotune = IDE_TUNE_AUTO;
1740 hwif->drives[1].autotune = IDE_TUNE_AUTO;
1741 goto obsolete_option;
1742 case -2: /* "serialize" */
1743 do_serialize:
1744 hwif->mate = &ide_hwifs[hw^1];
1745 hwif->mate->mate = hwif;
1746 hwif->serialized = hwif->mate->serialized = 1;
1747 goto obsolete_option;
1748
1749 case -1: /* "noprobe" */
1750 hwif->noprobe = 1;
1751 goto done;
1752
1753 case 1: /* base */
1754 vals[1] = vals[0] + 0x206; /* default ctl */
1755 case 2: /* base,ctl */
1756 vals[2] = 0; /* default irq = probe for it */
1757 case 3: /* base,ctl,irq */
1758 hwif->hw.irq = vals[2];
1759 ide_init_hwif_ports(&hwif->hw, (unsigned long) vals[0], (unsigned long) vals[1], &hwif->irq);
1760 memcpy(hwif->io_ports, hwif->hw.io_ports, sizeof(hwif->io_ports));
1761 hwif->irq = vals[2];
1762 hwif->noprobe = 0;
1763 hwif->chipset = ide_forced;
1764 goto obsolete_option;
1765
1766 case 0: goto bad_option;
1767 default:
1768 printk(" -- SUPPORT NOT CONFIGURED IN THIS KERNEL\n");
1769 return 1;
1770 }
1771 }
1772 bad_option:
1773 printk(" -- BAD OPTION\n");
1774 return 1;
1775 obsolete_option:
1776 printk(" -- OBSOLETE OPTION, WILL BE REMOVED SOON!\n");
1777 return 1;
1778 bad_hwif:
1779 printk("-- NOT SUPPORTED ON ide%d", hw);
1780 done:
1781 printk("\n");
1782 return 1;
1783 }
1784
1785 extern void __init pnpide_init(void);
1786 extern void __exit pnpide_exit(void);
1787 extern void __init h8300_ide_init(void);
1788
1789 /*
1790 * probe_for_hwifs() finds/initializes "known" IDE interfaces
1791 */
1792 static void __init probe_for_hwifs (void)
1793 {
1794 #ifdef CONFIG_BLK_DEV_IDEPCI
1795 ide_scan_pcibus(ide_scan_direction);
1796 #endif /* CONFIG_BLK_DEV_IDEPCI */
1797
1798 #ifdef CONFIG_ETRAX_IDE
1799 {
1800 extern void init_e100_ide(void);
1801 init_e100_ide();
1802 }
1803 #endif /* CONFIG_ETRAX_IDE */
1804 #ifdef CONFIG_BLK_DEV_CMD640
1805 {
1806 extern void ide_probe_for_cmd640x(void);
1807 ide_probe_for_cmd640x();
1808 }
1809 #endif /* CONFIG_BLK_DEV_CMD640 */
1810 #ifdef CONFIG_BLK_DEV_IDE_PMAC
1811 {
1812 extern void pmac_ide_probe(void);
1813 pmac_ide_probe();
1814 }
1815 #endif /* CONFIG_BLK_DEV_IDE_PMAC */
1816 #ifdef CONFIG_BLK_DEV_GAYLE
1817 {
1818 extern void gayle_init(void);
1819 gayle_init();
1820 }
1821 #endif /* CONFIG_BLK_DEV_GAYLE */
1822 #ifdef CONFIG_BLK_DEV_FALCON_IDE
1823 {
1824 extern void falconide_init(void);
1825 falconide_init();
1826 }
1827 #endif /* CONFIG_BLK_DEV_FALCON_IDE */
1828 #ifdef CONFIG_BLK_DEV_MAC_IDE
1829 {
1830 extern void macide_init(void);
1831 macide_init();
1832 }
1833 #endif /* CONFIG_BLK_DEV_MAC_IDE */
1834 #ifdef CONFIG_BLK_DEV_Q40IDE
1835 {
1836 extern void q40ide_init(void);
1837 q40ide_init();
1838 }
1839 #endif /* CONFIG_BLK_DEV_Q40IDE */
1840 #ifdef CONFIG_BLK_DEV_BUDDHA
1841 {
1842 extern void buddha_init(void);
1843 buddha_init();
1844 }
1845 #endif /* CONFIG_BLK_DEV_BUDDHA */
1846 #ifdef CONFIG_BLK_DEV_IDEPNP
1847 pnpide_init();
1848 #endif
1849 #ifdef CONFIG_H8300
1850 h8300_ide_init();
1851 #endif
1852 }
1853
1854 void ide_register_subdriver(ide_drive_t *drive, ide_driver_t *driver)
1855 {
1856 #ifdef CONFIG_PROC_FS
1857 ide_add_proc_entries(drive->proc, driver->proc, drive);
1858 #endif
1859 }
1860
1861 EXPORT_SYMBOL(ide_register_subdriver);
1862
1863 /**
1864 * ide_unregister_subdriver - disconnect drive from driver
1865 * @drive: drive to unplug
1866 * @driver: driver
1867 *
1868 * Disconnect a drive from the driver it was attached to and then
1869 * clean up the various proc files and other objects attached to it.
1870 *
1871 * Takes ide_setting_sem and ide_lock.
1872 * Caller must hold none of the locks.
1873 */
1874
1875 void ide_unregister_subdriver(ide_drive_t *drive, ide_driver_t *driver)
1876 {
1877 unsigned long flags;
1878
1879 #ifdef CONFIG_PROC_FS
1880 ide_remove_proc_entries(drive->proc, driver->proc);
1881 #endif
1882 down(&ide_setting_sem);
1883 spin_lock_irqsave(&ide_lock, flags);
1884 /*
1885 * ide_setting_sem protects the settings list
1886 * ide_lock protects the use of settings
1887 *
1888 * so we need to hold both, ide_settings_sem because we want to
1889 * modify the settings list, and ide_lock because we cannot take
1890 * a setting out that is being used.
1891 *
1892 * OTOH both ide_{read,write}_setting are only ever used under
1893 * ide_setting_sem.
1894 */
1895 auto_remove_settings(drive);
1896 spin_unlock_irqrestore(&ide_lock, flags);
1897 up(&ide_setting_sem);
1898 }
1899
1900 EXPORT_SYMBOL(ide_unregister_subdriver);
1901
1902 /*
1903 * Probe module
1904 */
1905
1906 EXPORT_SYMBOL(ide_lock);
1907
1908 static int ide_bus_match(struct device *dev, struct device_driver *drv)
1909 {
1910 return 1;
1911 }
1912
1913 static char *media_string(ide_drive_t *drive)
1914 {
1915 switch (drive->media) {
1916 case ide_disk:
1917 return "disk";
1918 case ide_cdrom:
1919 return "cdrom";
1920 case ide_tape:
1921 return "tape";
1922 case ide_floppy:
1923 return "floppy";
1924 default:
1925 return "UNKNOWN";
1926 }
1927 }
1928
1929 static ssize_t media_show(struct device *dev, struct device_attribute *attr, char *buf)
1930 {
1931 ide_drive_t *drive = to_ide_device(dev);
1932 return sprintf(buf, "%s\n", media_string(drive));
1933 }
1934
1935 static ssize_t drivename_show(struct device *dev, struct device_attribute *attr, char *buf)
1936 {
1937 ide_drive_t *drive = to_ide_device(dev);
1938 return sprintf(buf, "%s\n", drive->name);
1939 }
1940
1941 static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf)
1942 {
1943 ide_drive_t *drive = to_ide_device(dev);
1944 return sprintf(buf, "ide:m-%s\n", media_string(drive));
1945 }
1946
1947 static struct device_attribute ide_dev_attrs[] = {
1948 __ATTR_RO(media),
1949 __ATTR_RO(drivename),
1950 __ATTR_RO(modalias),
1951 __ATTR_NULL
1952 };
1953
1954 static int ide_uevent(struct device *dev, char **envp, int num_envp,
1955 char *buffer, int buffer_size)
1956 {
1957 ide_drive_t *drive = to_ide_device(dev);
1958 int i = 0;
1959 int length = 0;
1960
1961 add_uevent_var(envp, num_envp, &i, buffer, buffer_size, &length,
1962 "MEDIA=%s", media_string(drive));
1963 add_uevent_var(envp, num_envp, &i, buffer, buffer_size, &length,
1964 "DRIVENAME=%s", drive->name);
1965 add_uevent_var(envp, num_envp, &i, buffer, buffer_size, &length,
1966 "MODALIAS=ide:m-%s", media_string(drive));
1967 envp[i] = NULL;
1968 return 0;
1969 }
1970
1971 static int generic_ide_probe(struct device *dev)
1972 {
1973 ide_drive_t *drive = to_ide_device(dev);
1974 ide_driver_t *drv = to_ide_driver(dev->driver);
1975
1976 return drv->probe ? drv->probe(drive) : -ENODEV;
1977 }
1978
1979 static int generic_ide_remove(struct device *dev)
1980 {
1981 ide_drive_t *drive = to_ide_device(dev);
1982 ide_driver_t *drv = to_ide_driver(dev->driver);
1983
1984 if (drv->remove)
1985 drv->remove(drive);
1986
1987 return 0;
1988 }
1989
1990 static void generic_ide_shutdown(struct device *dev)
1991 {
1992 ide_drive_t *drive = to_ide_device(dev);
1993 ide_driver_t *drv = to_ide_driver(dev->driver);
1994
1995 if (dev->driver && drv->shutdown)
1996 drv->shutdown(drive);
1997 }
1998
1999 struct bus_type ide_bus_type = {
2000 .name = "ide",
2001 .match = ide_bus_match,
2002 .uevent = ide_uevent,
2003 .probe = generic_ide_probe,
2004 .remove = generic_ide_remove,
2005 .shutdown = generic_ide_shutdown,
2006 .dev_attrs = ide_dev_attrs,
2007 .suspend = generic_ide_suspend,
2008 .resume = generic_ide_resume,
2009 };
2010
2011 EXPORT_SYMBOL_GPL(ide_bus_type);
2012
2013 /*
2014 * This is gets invoked once during initialization, to set *everything* up
2015 */
2016 static int __init ide_init(void)
2017 {
2018 int ret;
2019
2020 printk(KERN_INFO "Uniform Multi-Platform E-IDE driver " REVISION "\n");
2021 system_bus_speed = ide_system_bus_speed();
2022
2023 ret = bus_register(&ide_bus_type);
2024 if (ret < 0) {
2025 printk(KERN_WARNING "IDE: bus_register error: %d\n", ret);
2026 return ret;
2027 }
2028
2029 init_ide_data();
2030
2031 #ifdef CONFIG_PROC_FS
2032 proc_ide_root = proc_mkdir("ide", NULL);
2033 #endif
2034
2035 #ifdef CONFIG_BLK_DEV_ALI14XX
2036 if (probe_ali14xx)
2037 (void)ali14xx_init();
2038 #endif
2039 #ifdef CONFIG_BLK_DEV_UMC8672
2040 if (probe_umc8672)
2041 (void)umc8672_init();
2042 #endif
2043 #ifdef CONFIG_BLK_DEV_DTC2278
2044 if (probe_dtc2278)
2045 (void)dtc2278_init();
2046 #endif
2047 #ifdef CONFIG_BLK_DEV_HT6560B
2048 if (probe_ht6560b)
2049 (void)ht6560b_init();
2050 #endif
2051 #ifdef CONFIG_BLK_DEV_QD65XX
2052 if (probe_qd65xx)
2053 (void)qd65xx_init();
2054 #endif
2055
2056 initializing = 1;
2057 /* Probe for special PCI and other "known" interface chipsets. */
2058 probe_for_hwifs();
2059 initializing = 0;
2060
2061 #ifdef CONFIG_PROC_FS
2062 proc_ide_create();
2063 #endif
2064 return 0;
2065 }
2066
2067 #ifdef MODULE
2068 static char *options = NULL;
2069 module_param(options, charp, 0);
2070 MODULE_LICENSE("GPL");
2071
2072 static void __init parse_options (char *line)
2073 {
2074 char *next = line;
2075
2076 if (line == NULL || !*line)
2077 return;
2078 while ((line = next) != NULL) {
2079 if ((next = strchr(line,' ')) != NULL)
2080 *next++ = 0;
2081 if (!ide_setup(line))
2082 printk (KERN_INFO "Unknown option '%s'\n", line);
2083 }
2084 }
2085
2086 int __init init_module (void)
2087 {
2088 parse_options(options);
2089 return ide_init();
2090 }
2091
2092 void __exit cleanup_module (void)
2093 {
2094 int index;
2095
2096 for (index = 0; index < MAX_HWIFS; ++index)
2097 ide_unregister(index);
2098
2099 #ifdef CONFIG_BLK_DEV_IDEPNP
2100 pnpide_exit();
2101 #endif
2102
2103 #ifdef CONFIG_PROC_FS
2104 proc_ide_destroy();
2105 #endif
2106
2107 bus_unregister(&ide_bus_type);
2108 }
2109
2110 #else /* !MODULE */
2111
2112 __setup("", ide_setup);
2113
2114 module_init(ide_init);
2115
2116 #endif /* MODULE */
Linux with added FPC-III support