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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
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/config.h>
134#include <linux/module.h>
135#include <linux/types.h>
136#include <linux/string.h>
137#include <linux/kernel.h>
138#include <linux/timer.h>
139#include <linux/mm.h>
140#include <linux/interrupt.h>
141#include <linux/major.h>
142#include <linux/errno.h>
143#include <linux/genhd.h>
144#include <linux/blkpg.h>
145#include <linux/slab.h>
146#include <linux/init.h>
147#include <linux/pci.h>
148#include <linux/delay.h>
149#include <linux/ide.h>
150#include <linux/devfs_fs_kernel.h>
151#include <linux/completion.h>
152#include <linux/reboot.h>
153#include <linux/cdrom.h>
154#include <linux/seq_file.h>
155#include <linux/device.h>
156#include <linux/bitops.h>
157
158#include <asm/byteorder.h>
159#include <asm/irq.h>
160#include <asm/uaccess.h>
161#include <asm/io.h>
162
163
164/* default maximum number of failures */
165#define IDE_DEFAULT_MAX_FAILURES 1
166
167static const u8 ide_hwif_to_major[] = { IDE0_MAJOR, IDE1_MAJOR,
168 IDE2_MAJOR, IDE3_MAJOR,
169 IDE4_MAJOR, IDE5_MAJOR,
170 IDE6_MAJOR, IDE7_MAJOR,
171 IDE8_MAJOR, IDE9_MAJOR };
172
173static int idebus_parameter; /* holds the "idebus=" parameter */
174static int system_bus_speed; /* holds what we think is VESA/PCI bus speed */
175static int initializing; /* set while initializing built-in drivers */
176
177DECLARE_MUTEX(ide_cfg_sem);
178 __cacheline_aligned_in_smp DEFINE_SPINLOCK(ide_lock);
179
180#ifdef CONFIG_BLK_DEV_IDEPCI
181static int ide_scan_direction; /* THIS was formerly 2.2.x pci=reverse */
182#endif
183
184#ifdef CONFIG_IDEDMA_AUTO
185int noautodma = 0;
186#else
187int noautodma = 1;
188#endif
189
190EXPORT_SYMBOL(noautodma);
191
192/*
193 * This is declared extern in ide.h, for access by other IDE modules:
194 */
195ide_hwif_t ide_hwifs[MAX_HWIFS]; /* master data repository */
196
197EXPORT_SYMBOL(ide_hwifs);
198
Linus Torvalds1da177e2005-04-16 15:20:36 -0700199/*
200 * Do not even *think* about calling this!
201 */
202static void init_hwif_data(ide_hwif_t *hwif, unsigned int index)
203{
204 unsigned int unit;
205
206 /* bulk initialize hwif & drive info with zeros */
207 memset(hwif, 0, sizeof(ide_hwif_t));
208
209 /* fill in any non-zero initial values */
210 hwif->index = index;
211 hwif->major = ide_hwif_to_major[index];
212
213 hwif->name[0] = 'i';
214 hwif->name[1] = 'd';
215 hwif->name[2] = 'e';
216 hwif->name[3] = '0' + index;
217
218 hwif->bus_state = BUSSTATE_ON;
219
220 hwif->atapi_dma = 0; /* disable all atapi dma */
221 hwif->ultra_mask = 0x80; /* disable all ultra */
222 hwif->mwdma_mask = 0x80; /* disable all mwdma */
223 hwif->swdma_mask = 0x80; /* disable all swdma */
224
225 sema_init(&hwif->gendev_rel_sem, 0);
226
227 default_hwif_iops(hwif);
228 default_hwif_transport(hwif);
229 for (unit = 0; unit < MAX_DRIVES; ++unit) {
230 ide_drive_t *drive = &hwif->drives[unit];
231
232 drive->media = ide_disk;
233 drive->select.all = (unit<<4)|0xa0;
234 drive->hwif = hwif;
235 drive->ctl = 0x08;
236 drive->ready_stat = READY_STAT;
237 drive->bad_wstat = BAD_W_STAT;
238 drive->special.b.recalibrate = 1;
239 drive->special.b.set_geometry = 1;
240 drive->name[0] = 'h';
241 drive->name[1] = 'd';
242 drive->name[2] = 'a' + (index * MAX_DRIVES) + unit;
243 drive->max_failures = IDE_DEFAULT_MAX_FAILURES;
244 drive->using_dma = 0;
245 drive->is_flash = 0;
246 drive->vdma = 0;
247 INIT_LIST_HEAD(&drive->list);
248 sema_init(&drive->gendev_rel_sem, 0);
249 }
250}
251
252static void init_hwif_default(ide_hwif_t *hwif, unsigned int index)
253{
254 hw_regs_t hw;
255
256 memset(&hw, 0, sizeof(hw_regs_t));
257
258 ide_init_hwif_ports(&hw, ide_default_io_base(index), 0, &hwif->irq);
259
260 memcpy(&hwif->hw, &hw, sizeof(hw));
261 memcpy(hwif->io_ports, hw.io_ports, sizeof(hw.io_ports));
262
263 hwif->noprobe = !hwif->io_ports[IDE_DATA_OFFSET];
264#ifdef CONFIG_BLK_DEV_HD
265 if (hwif->io_ports[IDE_DATA_OFFSET] == HD_DATA)
266 hwif->noprobe = 1; /* may be overridden by ide_setup() */
267#endif
268}
269
270extern void ide_arm_init(void);
271
272/*
273 * init_ide_data() sets reasonable default values into all fields
274 * of all instances of the hwifs and drives, but only on the first call.
275 * Subsequent calls have no effect (they don't wipe out anything).
276 *
277 * This routine is normally called at driver initialization time,
278 * but may also be called MUCH earlier during kernel "command-line"
279 * parameter processing. As such, we cannot depend on any other parts
280 * of the kernel (such as memory allocation) to be functioning yet.
281 *
282 * This is too bad, as otherwise we could dynamically allocate the
283 * ide_drive_t structs as needed, rather than always consuming memory
284 * for the max possible number (MAX_HWIFS * MAX_DRIVES) of them.
285 *
286 * FIXME: We should stuff the setup data into __init and copy the
287 * relevant hwifs/allocate them properly during boot.
288 */
289#define MAGIC_COOKIE 0x12345678
290static void __init init_ide_data (void)
291{
292 ide_hwif_t *hwif;
293 unsigned int index;
294 static unsigned long magic_cookie = MAGIC_COOKIE;
295
296 if (magic_cookie != MAGIC_COOKIE)
297 return; /* already initialized */
298 magic_cookie = 0;
299
300 /* Initialise all interface structures */
301 for (index = 0; index < MAX_HWIFS; ++index) {
302 hwif = &ide_hwifs[index];
303 init_hwif_data(hwif, index);
304 init_hwif_default(hwif, index);
305#if !defined(CONFIG_PPC32) || !defined(CONFIG_PCI)
306 hwif->irq = hwif->hw.irq =
307 ide_init_default_irq(hwif->io_ports[IDE_DATA_OFFSET]);
308#endif
309 }
310#ifdef CONFIG_IDE_ARM
311 initializing = 1;
312 ide_arm_init();
313 initializing = 0;
314#endif
315}
316
317/**
318 * ide_system_bus_speed - guess bus speed
319 *
320 * ide_system_bus_speed() returns what we think is the system VESA/PCI
321 * bus speed (in MHz). This is used for calculating interface PIO timings.
322 * The default is 40 for known PCI systems, 50 otherwise.
323 * The "idebus=xx" parameter can be used to override this value.
324 * The actual value to be used is computed/displayed the first time
325 * through. Drivers should only use this as a last resort.
326 *
327 * Returns a guessed speed in MHz.
328 */
329
330static int ide_system_bus_speed(void)
331{
332#ifdef CONFIG_PCI
333 static struct pci_device_id pci_default[] = {
334 { PCI_DEVICE(PCI_ANY_ID, PCI_ANY_ID) },
335 { }
336 };
337#else
338#define pci_default 0
339#endif /* CONFIG_PCI */
340
341 if (!system_bus_speed) {
342 if (idebus_parameter) {
343 /* user supplied value */
344 system_bus_speed = idebus_parameter;
345 } else if (pci_dev_present(pci_default)) {
346 /* safe default value for PCI */
347 system_bus_speed = 33;
348 } else {
349 /* safe default value for VESA and PCI */
350 system_bus_speed = 50;
351 }
352 printk(KERN_INFO "ide: Assuming %dMHz system bus speed "
353 "for PIO modes%s\n", system_bus_speed,
354 idebus_parameter ? "" : "; override with idebus=xx");
355 }
356 return system_bus_speed;
357}
358
Linus Torvalds1da177e2005-04-16 15:20:36 -0700359#ifdef CONFIG_PROC_FS
360struct proc_dir_entry *proc_ide_root;
361#endif
362
363static struct resource* hwif_request_region(ide_hwif_t *hwif,
364 unsigned long addr, int num)
365{
366 struct resource *res = request_region(addr, num, hwif->name);
367
368 if (!res)
369 printk(KERN_ERR "%s: I/O resource 0x%lX-0x%lX not free.\n",
370 hwif->name, addr, addr+num-1);
371 return res;
372}
373
374/**
375 * ide_hwif_request_regions - request resources for IDE
376 * @hwif: interface to use
377 *
378 * Requests all the needed resources for an interface.
379 * Right now core IDE code does this work which is deeply wrong.
380 * MMIO leaves it to the controller driver,
381 * PIO will migrate this way over time.
382 */
383
384int ide_hwif_request_regions(ide_hwif_t *hwif)
385{
386 unsigned long addr;
387 unsigned int i;
388
389 if (hwif->mmio == 2)
390 return 0;
391 BUG_ON(hwif->mmio == 1);
392 addr = hwif->io_ports[IDE_CONTROL_OFFSET];
393 if (addr && !hwif_request_region(hwif, addr, 1))
394 goto control_region_busy;
395 hwif->straight8 = 0;
396 addr = hwif->io_ports[IDE_DATA_OFFSET];
397 if ((addr | 7) == hwif->io_ports[IDE_STATUS_OFFSET]) {
398 if (!hwif_request_region(hwif, addr, 8))
399 goto data_region_busy;
400 hwif->straight8 = 1;
401 return 0;
402 }
403 for (i = IDE_DATA_OFFSET; i <= IDE_STATUS_OFFSET; i++) {
404 addr = hwif->io_ports[i];
405 if (!hwif_request_region(hwif, addr, 1)) {
406 while (--i)
407 release_region(addr, 1);
408 goto data_region_busy;
409 }
410 }
411 return 0;
412
413data_region_busy:
414 addr = hwif->io_ports[IDE_CONTROL_OFFSET];
415 if (addr)
416 release_region(addr, 1);
417control_region_busy:
418 /* If any errors are return, we drop the hwif interface. */
419 return -EBUSY;
420}
421
422/**
423 * ide_hwif_release_regions - free IDE resources
424 *
425 * Note that we only release the standard ports,
426 * and do not even try to handle any extra ports
427 * allocated for weird IDE interface chipsets.
428 *
429 * Note also that we don't yet handle mmio resources here. More
430 * importantly our caller should be doing this so we need to
431 * restructure this as a helper function for drivers.
432 */
433
434void ide_hwif_release_regions(ide_hwif_t *hwif)
435{
436 u32 i = 0;
437
438 if (hwif->mmio == 2)
439 return;
440 if (hwif->io_ports[IDE_CONTROL_OFFSET])
441 release_region(hwif->io_ports[IDE_CONTROL_OFFSET], 1);
442 if (hwif->straight8) {
443 release_region(hwif->io_ports[IDE_DATA_OFFSET], 8);
444 return;
445 }
446 for (i = IDE_DATA_OFFSET; i <= IDE_STATUS_OFFSET; i++)
447 if (hwif->io_ports[i])
448 release_region(hwif->io_ports[i], 1);
449}
450
451/**
452 * ide_hwif_restore - restore hwif to template
453 * @hwif: hwif to update
454 * @tmp_hwif: template
455 *
456 * Restore hwif to a previous state by copying most settngs
457 * from the template.
458 */
459
460static void ide_hwif_restore(ide_hwif_t *hwif, ide_hwif_t *tmp_hwif)
461{
462 hwif->hwgroup = tmp_hwif->hwgroup;
463
464 hwif->gendev.parent = tmp_hwif->gendev.parent;
465
466 hwif->proc = tmp_hwif->proc;
467
468 hwif->major = tmp_hwif->major;
469 hwif->straight8 = tmp_hwif->straight8;
470 hwif->bus_state = tmp_hwif->bus_state;
471
472 hwif->atapi_dma = tmp_hwif->atapi_dma;
473 hwif->ultra_mask = tmp_hwif->ultra_mask;
474 hwif->mwdma_mask = tmp_hwif->mwdma_mask;
475 hwif->swdma_mask = tmp_hwif->swdma_mask;
476
477 hwif->chipset = tmp_hwif->chipset;
478 hwif->hold = tmp_hwif->hold;
479
480#ifdef CONFIG_BLK_DEV_IDEPCI
481 hwif->pci_dev = tmp_hwif->pci_dev;
482 hwif->cds = tmp_hwif->cds;
483#endif
484
485 hwif->tuneproc = tmp_hwif->tuneproc;
486 hwif->speedproc = tmp_hwif->speedproc;
487 hwif->selectproc = tmp_hwif->selectproc;
488 hwif->reset_poll = tmp_hwif->reset_poll;
489 hwif->pre_reset = tmp_hwif->pre_reset;
490 hwif->resetproc = tmp_hwif->resetproc;
491 hwif->intrproc = tmp_hwif->intrproc;
492 hwif->maskproc = tmp_hwif->maskproc;
493 hwif->quirkproc = tmp_hwif->quirkproc;
494 hwif->busproc = tmp_hwif->busproc;
495
496 hwif->ata_input_data = tmp_hwif->ata_input_data;
497 hwif->ata_output_data = tmp_hwif->ata_output_data;
498 hwif->atapi_input_bytes = tmp_hwif->atapi_input_bytes;
499 hwif->atapi_output_bytes = tmp_hwif->atapi_output_bytes;
500
501 hwif->dma_setup = tmp_hwif->dma_setup;
502 hwif->dma_exec_cmd = tmp_hwif->dma_exec_cmd;
503 hwif->dma_start = tmp_hwif->dma_start;
504 hwif->ide_dma_end = tmp_hwif->ide_dma_end;
505 hwif->ide_dma_check = tmp_hwif->ide_dma_check;
506 hwif->ide_dma_on = tmp_hwif->ide_dma_on;
507 hwif->ide_dma_off_quietly = tmp_hwif->ide_dma_off_quietly;
508 hwif->ide_dma_test_irq = tmp_hwif->ide_dma_test_irq;
509 hwif->ide_dma_host_on = tmp_hwif->ide_dma_host_on;
510 hwif->ide_dma_host_off = tmp_hwif->ide_dma_host_off;
511 hwif->ide_dma_lostirq = tmp_hwif->ide_dma_lostirq;
512 hwif->ide_dma_timeout = tmp_hwif->ide_dma_timeout;
513
514 hwif->OUTB = tmp_hwif->OUTB;
515 hwif->OUTBSYNC = tmp_hwif->OUTBSYNC;
516 hwif->OUTW = tmp_hwif->OUTW;
517 hwif->OUTL = tmp_hwif->OUTL;
518 hwif->OUTSW = tmp_hwif->OUTSW;
519 hwif->OUTSL = tmp_hwif->OUTSL;
520
521 hwif->INB = tmp_hwif->INB;
522 hwif->INW = tmp_hwif->INW;
523 hwif->INL = tmp_hwif->INL;
524 hwif->INSW = tmp_hwif->INSW;
525 hwif->INSL = tmp_hwif->INSL;
526
527 hwif->sg_max_nents = tmp_hwif->sg_max_nents;
528
529 hwif->mmio = tmp_hwif->mmio;
530 hwif->rqsize = tmp_hwif->rqsize;
531 hwif->no_lba48 = tmp_hwif->no_lba48;
532
533#ifndef CONFIG_BLK_DEV_IDECS
534 hwif->irq = tmp_hwif->irq;
535#endif
536
537 hwif->dma_base = tmp_hwif->dma_base;
538 hwif->dma_master = tmp_hwif->dma_master;
539 hwif->dma_command = tmp_hwif->dma_command;
540 hwif->dma_vendor1 = tmp_hwif->dma_vendor1;
541 hwif->dma_status = tmp_hwif->dma_status;
542 hwif->dma_vendor3 = tmp_hwif->dma_vendor3;
543 hwif->dma_prdtable = tmp_hwif->dma_prdtable;
544
545 hwif->dma_extra = tmp_hwif->dma_extra;
546 hwif->config_data = tmp_hwif->config_data;
547 hwif->select_data = tmp_hwif->select_data;
548 hwif->autodma = tmp_hwif->autodma;
549 hwif->udma_four = tmp_hwif->udma_four;
550 hwif->no_dsc = tmp_hwif->no_dsc;
551
552 hwif->hwif_data = tmp_hwif->hwif_data;
553}
554
555/**
556 * ide_unregister - free an ide interface
557 * @index: index of interface (will change soon to a pointer)
558 *
559 * Perform the final unregister of an IDE interface. At the moment
560 * we don't refcount interfaces so this will also get split up.
561 *
562 * Locking:
563 * The caller must not hold the IDE locks
564 * The drive present/vanishing is not yet properly locked
565 * Take care with the callbacks. These have been split to avoid
566 * deadlocking the IDE layer. The shutdown callback is called
567 * before we take the lock and free resources. It is up to the
568 * caller to be sure there is no pending I/O here, and that
569 * the interfce will not be reopened (present/vanishing locking
570 * isnt yet done btw). After we commit to the final kill we
571 * call the cleanup callback with the ide locks held.
572 *
573 * Unregister restores the hwif structures to the default state.
574 * This is raving bonkers.
575 */
576
577void ide_unregister(unsigned int index)
578{
579 ide_drive_t *drive;
580 ide_hwif_t *hwif, *g;
581 static ide_hwif_t tmp_hwif; /* protected by ide_cfg_sem */
582 ide_hwgroup_t *hwgroup;
Bartlomiej Zolnierkiewicz8604aff2005-05-26 14:55:34 +0200583 int irq_count = 0, unit;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700584
585 BUG_ON(index >= MAX_HWIFS);
586
587 BUG_ON(in_interrupt());
588 BUG_ON(irqs_disabled());
589 down(&ide_cfg_sem);
590 spin_lock_irq(&ide_lock);
591 hwif = &ide_hwifs[index];
592 if (!hwif->present)
593 goto abort;
594 for (unit = 0; unit < MAX_DRIVES; ++unit) {
595 drive = &hwif->drives[unit];
Bartlomiej Zolnierkiewicz8604aff2005-05-26 14:55:34 +0200596 if (!drive->present) {
597 if (drive->devfs_name[0] != '\0') {
598 devfs_remove(drive->devfs_name);
599 drive->devfs_name[0] = '\0';
600 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700601 continue;
Bartlomiej Zolnierkiewicz8604aff2005-05-26 14:55:34 +0200602 }
603 spin_unlock_irq(&ide_lock);
604 device_unregister(&drive->gendev);
605 down(&drive->gendev_rel_sem);
606 spin_lock_irq(&ide_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700607 }
608 hwif->present = 0;
609
610 spin_unlock_irq(&ide_lock);
611
Linus Torvalds1da177e2005-04-16 15:20:36 -0700612 destroy_proc_ide_interface(hwif);
613
614 hwgroup = hwif->hwgroup;
615 /*
616 * free the irq if we were the only hwif using it
617 */
618 g = hwgroup->hwif;
619 do {
620 if (g->irq == hwif->irq)
621 ++irq_count;
622 g = g->next;
623 } while (g != hwgroup->hwif);
624 if (irq_count == 1)
625 free_irq(hwif->irq, hwgroup);
626
627 spin_lock_irq(&ide_lock);
628 /*
629 * Note that we only release the standard ports,
630 * and do not even try to handle any extra ports
631 * allocated for weird IDE interface chipsets.
632 */
633 ide_hwif_release_regions(hwif);
634
635 /*
636 * Remove us from the hwgroup, and free
637 * the hwgroup if we were the only member
638 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700639 if (hwif->next == hwif) {
640 BUG_ON(hwgroup->hwif != hwif);
641 kfree(hwgroup);
642 } else {
643 /* There is another interface in hwgroup.
644 * Unlink us, and set hwgroup->drive and ->hwif to
645 * something sane.
646 */
647 g = hwgroup->hwif;
648 while (g->next != hwif)
649 g = g->next;
650 g->next = hwif->next;
651 if (hwgroup->hwif == hwif) {
652 /* Chose a random hwif for hwgroup->hwif.
653 * It's guaranteed that there are no drives
654 * left in the hwgroup.
655 */
656 BUG_ON(hwgroup->drive != NULL);
657 hwgroup->hwif = g;
658 }
659 BUG_ON(hwgroup->hwif == hwif);
660 }
661
662 /* More messed up locking ... */
663 spin_unlock_irq(&ide_lock);
664 device_unregister(&hwif->gendev);
665 down(&hwif->gendev_rel_sem);
666
667 /*
668 * Remove us from the kernel's knowledge
669 */
670 blk_unregister_region(MKDEV(hwif->major, 0), MAX_DRIVES<<PARTN_BITS);
671 kfree(hwif->sg_table);
672 unregister_blkdev(hwif->major, hwif->name);
673 spin_lock_irq(&ide_lock);
674
675 if (hwif->dma_base) {
676 (void) ide_release_dma(hwif);
677
678 hwif->dma_base = 0;
679 hwif->dma_master = 0;
680 hwif->dma_command = 0;
681 hwif->dma_vendor1 = 0;
682 hwif->dma_status = 0;
683 hwif->dma_vendor3 = 0;
684 hwif->dma_prdtable = 0;
685 }
686
687 /* copy original settings */
688 tmp_hwif = *hwif;
689
690 /* restore hwif data to pristine status */
691 init_hwif_data(hwif, index);
692 init_hwif_default(hwif, index);
693
694 ide_hwif_restore(hwif, &tmp_hwif);
695
696abort:
697 spin_unlock_irq(&ide_lock);
698 up(&ide_cfg_sem);
699}
700
701EXPORT_SYMBOL(ide_unregister);
702
703
704/**
705 * ide_setup_ports - set up IDE interface ports
706 * @hw: register descriptions
707 * @base: base register
708 * @offsets: table of register offsets
709 * @ctrl: control register
710 * @ack_irq: IRQ ack
711 * @irq: interrupt lie
712 *
713 * Setup hw_regs_t structure described by parameters. You
714 * may set up the hw structure yourself OR use this routine to
715 * do it for you. This is basically a helper
716 *
717 */
718
719void ide_setup_ports ( hw_regs_t *hw,
720 unsigned long base, int *offsets,
721 unsigned long ctrl, unsigned long intr,
722 ide_ack_intr_t *ack_intr,
723/*
724 * ide_io_ops_t *iops,
725 */
726 int irq)
727{
728 int i;
729
730 for (i = 0; i < IDE_NR_PORTS; i++) {
731 if (offsets[i] == -1) {
732 switch(i) {
733 case IDE_CONTROL_OFFSET:
734 hw->io_ports[i] = ctrl;
735 break;
736#if defined(CONFIG_AMIGA) || defined(CONFIG_MAC)
737 case IDE_IRQ_OFFSET:
738 hw->io_ports[i] = intr;
739 break;
740#endif /* (CONFIG_AMIGA) || (CONFIG_MAC) */
741 default:
742 hw->io_ports[i] = 0;
743 break;
744 }
745 } else {
746 hw->io_ports[i] = base + offsets[i];
747 }
748 }
749 hw->irq = irq;
750 hw->dma = NO_DMA;
751 hw->ack_intr = ack_intr;
752/*
753 * hw->iops = iops;
754 */
755}
756
757/**
758 * ide_register_hw_with_fixup - register IDE interface
759 * @hw: hardware registers
760 * @hwifp: pointer to returned hwif
761 * @fixup: fixup function
762 *
763 * Register an IDE interface, specifying exactly the registers etc.
764 * Set init=1 iff calling before probes have taken place.
765 *
766 * Returns -1 on error.
767 */
768
769int ide_register_hw_with_fixup(hw_regs_t *hw, ide_hwif_t **hwifp, void(*fixup)(ide_hwif_t *hwif))
770{
771 int index, retry = 1;
772 ide_hwif_t *hwif;
773
774 do {
775 for (index = 0; index < MAX_HWIFS; ++index) {
776 hwif = &ide_hwifs[index];
777 if (hwif->hw.io_ports[IDE_DATA_OFFSET] == hw->io_ports[IDE_DATA_OFFSET])
778 goto found;
779 }
780 for (index = 0; index < MAX_HWIFS; ++index) {
781 hwif = &ide_hwifs[index];
782 if (hwif->hold)
783 continue;
784 if ((!hwif->present && !hwif->mate && !initializing) ||
785 (!hwif->hw.io_ports[IDE_DATA_OFFSET] && initializing))
786 goto found;
787 }
788 for (index = 0; index < MAX_HWIFS; index++)
789 ide_unregister(index);
790 } while (retry--);
791 return -1;
792found:
793 if (hwif->present)
794 ide_unregister(index);
795 else if (!hwif->hold) {
796 init_hwif_data(hwif, index);
797 init_hwif_default(hwif, index);
798 }
799 if (hwif->present)
800 return -1;
801 memcpy(&hwif->hw, hw, sizeof(*hw));
802 memcpy(hwif->io_ports, hwif->hw.io_ports, sizeof(hwif->hw.io_ports));
803 hwif->irq = hw->irq;
804 hwif->noprobe = 0;
805 hwif->chipset = hw->chipset;
806
807 if (!initializing) {
808 probe_hwif_init_with_fixup(hwif, fixup);
809 create_proc_ide_interfaces();
810 }
811
812 if (hwifp)
813 *hwifp = hwif;
814
815 return (initializing || hwif->present) ? index : -1;
816}
817
818EXPORT_SYMBOL(ide_register_hw_with_fixup);
819
820int ide_register_hw(hw_regs_t *hw, ide_hwif_t **hwifp)
821{
822 return ide_register_hw_with_fixup(hw, hwifp, NULL);
823}
824
825EXPORT_SYMBOL(ide_register_hw);
826
827/*
828 * Locks for IDE setting functionality
829 */
830
831DECLARE_MUTEX(ide_setting_sem);
832
833/**
834 * __ide_add_setting - add an ide setting option
835 * @drive: drive to use
836 * @name: setting name
837 * @rw: true if the function is read write
838 * @read_ioctl: function to call on read
839 * @write_ioctl: function to call on write
840 * @data_type: type of data
841 * @min: range minimum
842 * @max: range maximum
843 * @mul_factor: multiplication scale
844 * @div_factor: divison scale
845 * @data: private data field
846 * @set: setting
847 * @auto_remove: setting auto removal flag
848 *
849 * Removes the setting named from the device if it is present.
850 * The function takes the settings_lock to protect against
851 * parallel changes. This function must not be called from IRQ
852 * context. Returns 0 on success or -1 on failure.
853 *
854 * BUGS: This code is seriously over-engineered. There is also
855 * magic about how the driver specific features are setup. If
856 * a driver is attached we assume the driver settings are auto
857 * remove.
858 */
859
860static 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)
861{
862 ide_settings_t **p = (ide_settings_t **) &drive->settings, *setting = NULL;
863
864 down(&ide_setting_sem);
865 while ((*p) && strcmp((*p)->name, name) < 0)
866 p = &((*p)->next);
867 if ((setting = kmalloc(sizeof(*setting), GFP_KERNEL)) == NULL)
868 goto abort;
869 memset(setting, 0, sizeof(*setting));
870 if ((setting->name = kmalloc(strlen(name) + 1, GFP_KERNEL)) == NULL)
871 goto abort;
872 strcpy(setting->name, name);
873 setting->rw = rw;
874 setting->read_ioctl = read_ioctl;
875 setting->write_ioctl = write_ioctl;
876 setting->data_type = data_type;
877 setting->min = min;
878 setting->max = max;
879 setting->mul_factor = mul_factor;
880 setting->div_factor = div_factor;
881 setting->data = data;
882 setting->set = set;
883
884 setting->next = *p;
885 if (auto_remove)
886 setting->auto_remove = 1;
887 *p = setting;
888 up(&ide_setting_sem);
889 return 0;
890abort:
891 up(&ide_setting_sem);
892 if (setting)
893 kfree(setting);
894 return -1;
895}
896
897int 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)
898{
899 return __ide_add_setting(drive, name, rw, read_ioctl, write_ioctl, data_type, min, max, mul_factor, div_factor, data, set, 1);
900}
901
902EXPORT_SYMBOL(ide_add_setting);
903
904/**
905 * __ide_remove_setting - remove an ide setting option
906 * @drive: drive to use
907 * @name: setting name
908 *
909 * Removes the setting named from the device if it is present.
910 * The caller must hold the setting semaphore.
911 */
912
913static void __ide_remove_setting (ide_drive_t *drive, char *name)
914{
915 ide_settings_t **p, *setting;
916
917 p = (ide_settings_t **) &drive->settings;
918
919 while ((*p) && strcmp((*p)->name, name))
920 p = &((*p)->next);
921 if ((setting = (*p)) == NULL)
922 return;
923
924 (*p) = setting->next;
925
926 kfree(setting->name);
927 kfree(setting);
928}
929
930/**
931 * ide_find_setting_by_ioctl - find a drive specific ioctl
932 * @drive: drive to scan
933 * @cmd: ioctl command to handle
934 *
935 * Scan's the device setting table for a matching entry and returns
936 * this or NULL if no entry is found. The caller must hold the
937 * setting semaphore
938 */
939
940static ide_settings_t *ide_find_setting_by_ioctl (ide_drive_t *drive, int cmd)
941{
942 ide_settings_t *setting = drive->settings;
943
944 while (setting) {
945 if (setting->read_ioctl == cmd || setting->write_ioctl == cmd)
946 break;
947 setting = setting->next;
948 }
949
950 return setting;
951}
952
953/**
954 * ide_find_setting_by_name - find a drive specific setting
955 * @drive: drive to scan
956 * @name: setting name
957 *
958 * Scan's the device setting table for a matching entry and returns
959 * this or NULL if no entry is found. The caller must hold the
960 * setting semaphore
961 */
962
963ide_settings_t *ide_find_setting_by_name (ide_drive_t *drive, char *name)
964{
965 ide_settings_t *setting = drive->settings;
966
967 while (setting) {
968 if (strcmp(setting->name, name) == 0)
969 break;
970 setting = setting->next;
971 }
972 return setting;
973}
974
975/**
976 * auto_remove_settings - remove driver specific settings
977 * @drive: drive
978 *
979 * Automatically remove all the driver specific settings for this
980 * drive. This function may sleep and must not be called from IRQ
981 * context. The caller must hold ide_setting_sem.
982 */
983
984static void auto_remove_settings (ide_drive_t *drive)
985{
986 ide_settings_t *setting;
987repeat:
988 setting = drive->settings;
989 while (setting) {
990 if (setting->auto_remove) {
991 __ide_remove_setting(drive, setting->name);
992 goto repeat;
993 }
994 setting = setting->next;
995 }
996}
997
998/**
999 * ide_read_setting - read an IDE setting
1000 * @drive: drive to read from
1001 * @setting: drive setting
1002 *
1003 * Read a drive setting and return the value. The caller
1004 * must hold the ide_setting_sem when making this call.
1005 *
1006 * BUGS: the data return and error are the same return value
1007 * so an error -EINVAL and true return of the same value cannot
1008 * be told apart
1009 */
1010
1011int ide_read_setting (ide_drive_t *drive, ide_settings_t *setting)
1012{
1013 int val = -EINVAL;
1014 unsigned long flags;
1015
1016 if ((setting->rw & SETTING_READ)) {
1017 spin_lock_irqsave(&ide_lock, flags);
1018 switch(setting->data_type) {
1019 case TYPE_BYTE:
1020 val = *((u8 *) setting->data);
1021 break;
1022 case TYPE_SHORT:
1023 val = *((u16 *) setting->data);
1024 break;
1025 case TYPE_INT:
1026 case TYPE_INTA:
1027 val = *((u32 *) setting->data);
1028 break;
1029 }
1030 spin_unlock_irqrestore(&ide_lock, flags);
1031 }
1032 return val;
1033}
1034
1035/**
1036 * ide_spin_wait_hwgroup - wait for group
1037 * @drive: drive in the group
1038 *
1039 * Wait for an IDE device group to go non busy and then return
1040 * holding the ide_lock which guards the hwgroup->busy status
1041 * and right to use it.
1042 */
1043
1044int ide_spin_wait_hwgroup (ide_drive_t *drive)
1045{
1046 ide_hwgroup_t *hwgroup = HWGROUP(drive);
1047 unsigned long timeout = jiffies + (3 * HZ);
1048
1049 spin_lock_irq(&ide_lock);
1050
1051 while (hwgroup->busy) {
1052 unsigned long lflags;
1053 spin_unlock_irq(&ide_lock);
1054 local_irq_set(lflags);
1055 if (time_after(jiffies, timeout)) {
1056 local_irq_restore(lflags);
1057 printk(KERN_ERR "%s: channel busy\n", drive->name);
1058 return -EBUSY;
1059 }
1060 local_irq_restore(lflags);
1061 spin_lock_irq(&ide_lock);
1062 }
1063 return 0;
1064}
1065
1066EXPORT_SYMBOL(ide_spin_wait_hwgroup);
1067
1068/**
1069 * ide_write_setting - read an IDE setting
1070 * @drive: drive to read from
1071 * @setting: drive setting
1072 * @val: value
1073 *
1074 * Write a drive setting if it is possible. The caller
1075 * must hold the ide_setting_sem when making this call.
1076 *
1077 * BUGS: the data return and error are the same return value
1078 * so an error -EINVAL and true return of the same value cannot
1079 * be told apart
1080 *
1081 * FIXME: This should be changed to enqueue a special request
1082 * to the driver to change settings, and then wait on a sema for completion.
1083 * The current scheme of polling is kludgy, though safe enough.
1084 */
1085
1086int ide_write_setting (ide_drive_t *drive, ide_settings_t *setting, int val)
1087{
1088 int i;
1089 u32 *p;
1090
1091 if (!capable(CAP_SYS_ADMIN))
1092 return -EACCES;
1093 if (!(setting->rw & SETTING_WRITE))
1094 return -EPERM;
1095 if (val < setting->min || val > setting->max)
1096 return -EINVAL;
1097 if (setting->set)
1098 return setting->set(drive, val);
1099 if (ide_spin_wait_hwgroup(drive))
1100 return -EBUSY;
1101 switch (setting->data_type) {
1102 case TYPE_BYTE:
1103 *((u8 *) setting->data) = val;
1104 break;
1105 case TYPE_SHORT:
1106 *((u16 *) setting->data) = val;
1107 break;
1108 case TYPE_INT:
1109 *((u32 *) setting->data) = val;
1110 break;
1111 case TYPE_INTA:
1112 p = (u32 *) setting->data;
1113 for (i = 0; i < 1 << PARTN_BITS; i++, p++)
1114 *p = val;
1115 break;
1116 }
1117 spin_unlock_irq(&ide_lock);
1118 return 0;
1119}
1120
1121static int set_io_32bit(ide_drive_t *drive, int arg)
1122{
1123 drive->io_32bit = arg;
1124#ifdef CONFIG_BLK_DEV_DTC2278
1125 if (HWIF(drive)->chipset == ide_dtc2278)
1126 HWIF(drive)->drives[!drive->select.b.unit].io_32bit = arg;
1127#endif /* CONFIG_BLK_DEV_DTC2278 */
1128 return 0;
1129}
1130
1131static int set_using_dma (ide_drive_t *drive, int arg)
1132{
1133#ifdef CONFIG_BLK_DEV_IDEDMA
1134 if (!drive->id || !(drive->id->capability & 1))
1135 return -EPERM;
1136 if (HWIF(drive)->ide_dma_check == NULL)
1137 return -EPERM;
1138 if (arg) {
1139 if (HWIF(drive)->ide_dma_check(drive)) return -EIO;
1140 if (HWIF(drive)->ide_dma_on(drive)) return -EIO;
1141 } else {
1142 if (__ide_dma_off(drive))
1143 return -EIO;
1144 }
1145 return 0;
1146#else
1147 return -EPERM;
1148#endif
1149}
1150
1151static int set_pio_mode (ide_drive_t *drive, int arg)
1152{
1153 struct request rq;
1154
1155 if (!HWIF(drive)->tuneproc)
1156 return -ENOSYS;
1157 if (drive->special.b.set_tune)
1158 return -EBUSY;
1159 ide_init_drive_cmd(&rq);
1160 drive->tune_req = (u8) arg;
1161 drive->special.b.set_tune = 1;
1162 (void) ide_do_drive_cmd(drive, &rq, ide_wait);
1163 return 0;
1164}
1165
1166static int set_xfer_rate (ide_drive_t *drive, int arg)
1167{
1168 int err = ide_wait_cmd(drive,
1169 WIN_SETFEATURES, (u8) arg,
1170 SETFEATURES_XFER, 0, NULL);
1171
1172 if (!err && arg) {
1173 ide_set_xfer_rate(drive, (u8) arg);
1174 ide_driveid_update(drive);
1175 }
1176 return err;
1177}
1178
1179/**
1180 * ide_add_generic_settings - generic ide settings
1181 * @drive: drive being configured
1182 *
1183 * Add the generic parts of the system settings to the /proc files and
1184 * ioctls for this IDE device. The caller must not be holding the
1185 * ide_setting_sem.
1186 */
1187
1188void ide_add_generic_settings (ide_drive_t *drive)
1189{
1190/*
1191 * drive setting name read/write access read ioctl write ioctl data type min max mul_factor div_factor data pointer set function
1192 */
1193 __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);
1194 __ide_add_setting(drive, "keepsettings", SETTING_RW, HDIO_GET_KEEPSETTINGS, HDIO_SET_KEEPSETTINGS, TYPE_BYTE, 0, 1, 1, 1, &drive->keep_settings, NULL, 0);
1195 __ide_add_setting(drive, "nice1", SETTING_RW, -1, -1, TYPE_BYTE, 0, 1, 1, 1, &drive->nice1, NULL, 0);
1196 __ide_add_setting(drive, "pio_mode", SETTING_WRITE, -1, HDIO_SET_PIO_MODE, TYPE_BYTE, 0, 255, 1, 1, NULL, set_pio_mode, 0);
1197 __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);
1198 __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);
1199 __ide_add_setting(drive, "init_speed", SETTING_RW, -1, -1, TYPE_BYTE, 0, 70, 1, 1, &drive->init_speed, NULL, 0);
1200 __ide_add_setting(drive, "current_speed", SETTING_RW, -1, -1, TYPE_BYTE, 0, 70, 1, 1, &drive->current_speed, set_xfer_rate, 0);
1201 __ide_add_setting(drive, "number", SETTING_RW, -1, -1, TYPE_BYTE, 0, 3, 1, 1, &drive->dn, NULL, 0);
1202}
1203
1204/**
1205 * system_bus_clock - clock guess
1206 *
1207 * External version of the bus clock guess used by very old IDE drivers
1208 * for things like VLB timings. Should not be used.
1209 */
1210
1211int system_bus_clock (void)
1212{
1213 return((int) ((!system_bus_speed) ? ide_system_bus_speed() : system_bus_speed ));
1214}
1215
1216EXPORT_SYMBOL(system_bus_clock);
1217
Linus Torvalds1da177e2005-04-16 15:20:36 -07001218static int generic_ide_suspend(struct device *dev, pm_message_t state)
1219{
1220 ide_drive_t *drive = dev->driver_data;
1221 struct request rq;
1222 struct request_pm_state rqpm;
1223 ide_task_t args;
1224
1225 memset(&rq, 0, sizeof(rq));
1226 memset(&rqpm, 0, sizeof(rqpm));
1227 memset(&args, 0, sizeof(args));
1228 rq.flags = REQ_PM_SUSPEND;
1229 rq.special = &args;
1230 rq.pm = &rqpm;
1231 rqpm.pm_step = ide_pm_state_start_suspend;
Pavel Machekca078ba2005-09-03 15:56:57 -07001232 rqpm.pm_state = state.event;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001233
1234 return ide_do_drive_cmd(drive, &rq, ide_wait);
1235}
1236
1237static int generic_ide_resume(struct device *dev)
1238{
1239 ide_drive_t *drive = dev->driver_data;
1240 struct request rq;
1241 struct request_pm_state rqpm;
1242 ide_task_t args;
1243
1244 memset(&rq, 0, sizeof(rq));
1245 memset(&rqpm, 0, sizeof(rqpm));
1246 memset(&args, 0, sizeof(args));
1247 rq.flags = REQ_PM_RESUME;
1248 rq.special = &args;
1249 rq.pm = &rqpm;
1250 rqpm.pm_step = ide_pm_state_start_resume;
Pavel Machekca078ba2005-09-03 15:56:57 -07001251 rqpm.pm_state = PM_EVENT_ON;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001252
1253 return ide_do_drive_cmd(drive, &rq, ide_head_wait);
1254}
1255
1256int generic_ide_ioctl(ide_drive_t *drive, struct file *file, struct block_device *bdev,
1257 unsigned int cmd, unsigned long arg)
1258{
1259 ide_settings_t *setting;
1260 ide_driver_t *drv;
1261 int err = 0;
1262 void __user *p = (void __user *)arg;
1263
1264 down(&ide_setting_sem);
1265 if ((setting = ide_find_setting_by_ioctl(drive, cmd)) != NULL) {
1266 if (cmd == setting->read_ioctl) {
1267 err = ide_read_setting(drive, setting);
1268 up(&ide_setting_sem);
1269 return err >= 0 ? put_user(err, (long __user *)arg) : err;
1270 } else {
1271 if (bdev != bdev->bd_contains)
1272 err = -EINVAL;
1273 else
1274 err = ide_write_setting(drive, setting, arg);
1275 up(&ide_setting_sem);
1276 return err;
1277 }
1278 }
1279 up(&ide_setting_sem);
1280
1281 switch (cmd) {
1282 case HDIO_GETGEO:
1283 {
1284 struct hd_geometry geom;
1285 if (!p || (drive->media != ide_disk && drive->media != ide_floppy)) return -EINVAL;
1286 geom.heads = drive->bios_head;
1287 geom.sectors = drive->bios_sect;
1288 geom.cylinders = (u16)drive->bios_cyl; /* truncate */
1289 geom.start = get_start_sect(bdev);
1290 if (copy_to_user(p, &geom, sizeof(struct hd_geometry)))
1291 return -EFAULT;
1292 return 0;
1293 }
1294
1295 case HDIO_OBSOLETE_IDENTITY:
1296 case HDIO_GET_IDENTITY:
1297 if (bdev != bdev->bd_contains)
1298 return -EINVAL;
1299 if (drive->id_read == 0)
1300 return -ENOMSG;
1301 if (copy_to_user(p, drive->id, (cmd == HDIO_GET_IDENTITY) ? sizeof(*drive->id) : 142))
1302 return -EFAULT;
1303 return 0;
1304
1305 case HDIO_GET_NICE:
1306 return put_user(drive->dsc_overlap << IDE_NICE_DSC_OVERLAP |
1307 drive->atapi_overlap << IDE_NICE_ATAPI_OVERLAP |
1308 drive->nice0 << IDE_NICE_0 |
1309 drive->nice1 << IDE_NICE_1 |
1310 drive->nice2 << IDE_NICE_2,
1311 (long __user *) arg);
1312
1313#ifdef CONFIG_IDE_TASK_IOCTL
1314 case HDIO_DRIVE_TASKFILE:
1315 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
1316 return -EACCES;
1317 switch(drive->media) {
1318 case ide_disk:
1319 return ide_taskfile_ioctl(drive, cmd, arg);
1320 default:
1321 return -ENOMSG;
1322 }
1323#endif /* CONFIG_IDE_TASK_IOCTL */
1324
1325 case HDIO_DRIVE_CMD:
1326 if (!capable(CAP_SYS_RAWIO))
1327 return -EACCES;
1328 return ide_cmd_ioctl(drive, cmd, arg);
1329
1330 case HDIO_DRIVE_TASK:
1331 if (!capable(CAP_SYS_RAWIO))
1332 return -EACCES;
1333 return ide_task_ioctl(drive, cmd, arg);
1334
1335 case HDIO_SCAN_HWIF:
1336 {
1337 hw_regs_t hw;
1338 int args[3];
1339 if (!capable(CAP_SYS_RAWIO)) return -EACCES;
1340 if (copy_from_user(args, p, 3 * sizeof(int)))
1341 return -EFAULT;
1342 memset(&hw, 0, sizeof(hw));
1343 ide_init_hwif_ports(&hw, (unsigned long) args[0],
1344 (unsigned long) args[1], NULL);
1345 hw.irq = args[2];
1346 if (ide_register_hw(&hw, NULL) == -1)
1347 return -EIO;
1348 return 0;
1349 }
1350 case HDIO_UNREGISTER_HWIF:
1351 if (!capable(CAP_SYS_RAWIO)) return -EACCES;
1352 /* (arg > MAX_HWIFS) checked in function */
1353 ide_unregister(arg);
1354 return 0;
1355 case HDIO_SET_NICE:
1356 if (!capable(CAP_SYS_ADMIN)) return -EACCES;
1357 if (arg != (arg & ((1 << IDE_NICE_DSC_OVERLAP) | (1 << IDE_NICE_1))))
1358 return -EPERM;
1359 drive->dsc_overlap = (arg >> IDE_NICE_DSC_OVERLAP) & 1;
1360 drv = *(ide_driver_t **)bdev->bd_disk->private_data;
1361 if (drive->dsc_overlap && !drv->supports_dsc_overlap) {
1362 drive->dsc_overlap = 0;
1363 return -EPERM;
1364 }
1365 drive->nice1 = (arg >> IDE_NICE_1) & 1;
1366 return 0;
1367 case HDIO_DRIVE_RESET:
1368 {
1369 unsigned long flags;
1370 if (!capable(CAP_SYS_ADMIN)) return -EACCES;
1371
1372 /*
1373 * Abort the current command on the
1374 * group if there is one, taking
1375 * care not to allow anything else
1376 * to be queued and to die on the
1377 * spot if we miss one somehow
1378 */
1379
1380 spin_lock_irqsave(&ide_lock, flags);
1381
1382 ide_abort(drive, "drive reset");
1383
1384 if(HWGROUP(drive)->handler)
1385 BUG();
1386
1387 /* Ensure nothing gets queued after we
1388 drop the lock. Reset will clear the busy */
1389
1390 HWGROUP(drive)->busy = 1;
1391 spin_unlock_irqrestore(&ide_lock, flags);
1392 (void) ide_do_reset(drive);
1393
1394 return 0;
1395 }
1396
1397 case CDROMEJECT:
1398 case CDROMCLOSETRAY:
1399 return scsi_cmd_ioctl(file, bdev->bd_disk, cmd, p);
1400
1401 case HDIO_GET_BUSSTATE:
1402 if (!capable(CAP_SYS_ADMIN))
1403 return -EACCES;
1404 if (put_user(HWIF(drive)->bus_state, (long __user *)arg))
1405 return -EFAULT;
1406 return 0;
1407
1408 case HDIO_SET_BUSSTATE:
1409 if (!capable(CAP_SYS_ADMIN))
1410 return -EACCES;
1411 if (HWIF(drive)->busproc)
1412 return HWIF(drive)->busproc(drive, (int)arg);
1413 return -EOPNOTSUPP;
1414 default:
1415 return -EINVAL;
1416 }
1417}
1418
1419EXPORT_SYMBOL(generic_ide_ioctl);
1420
1421/*
1422 * stridx() returns the offset of c within s,
1423 * or -1 if c is '\0' or not found within s.
1424 */
1425static int __init stridx (const char *s, char c)
1426{
1427 char *i = strchr(s, c);
1428 return (i && c) ? i - s : -1;
1429}
1430
1431/*
1432 * match_parm() does parsing for ide_setup():
1433 *
1434 * 1. the first char of s must be '='.
1435 * 2. if the remainder matches one of the supplied keywords,
1436 * the index (1 based) of the keyword is negated and returned.
1437 * 3. if the remainder is a series of no more than max_vals numbers
1438 * separated by commas, the numbers are saved in vals[] and a
1439 * count of how many were saved is returned. Base10 is assumed,
1440 * and base16 is allowed when prefixed with "0x".
1441 * 4. otherwise, zero is returned.
1442 */
1443static int __init match_parm (char *s, const char *keywords[], int vals[], int max_vals)
1444{
1445 static const char *decimal = "0123456789";
1446 static const char *hex = "0123456789abcdef";
1447 int i, n;
1448
1449 if (*s++ == '=') {
1450 /*
1451 * Try matching against the supplied keywords,
1452 * and return -(index+1) if we match one
1453 */
1454 if (keywords != NULL) {
1455 for (i = 0; *keywords != NULL; ++i) {
1456 if (!strcmp(s, *keywords++))
1457 return -(i+1);
1458 }
1459 }
1460 /*
1461 * Look for a series of no more than "max_vals"
1462 * numeric values separated by commas, in base10,
1463 * or base16 when prefixed with "0x".
1464 * Return a count of how many were found.
1465 */
1466 for (n = 0; (i = stridx(decimal, *s)) >= 0;) {
1467 vals[n] = i;
1468 while ((i = stridx(decimal, *++s)) >= 0)
1469 vals[n] = (vals[n] * 10) + i;
1470 if (*s == 'x' && !vals[n]) {
1471 while ((i = stridx(hex, *++s)) >= 0)
1472 vals[n] = (vals[n] * 0x10) + i;
1473 }
1474 if (++n == max_vals)
1475 break;
1476 if (*s == ',' || *s == ';')
1477 ++s;
1478 }
1479 if (!*s)
1480 return n;
1481 }
1482 return 0; /* zero = nothing matched */
1483}
1484
1485#ifdef CONFIG_BLK_DEV_ALI14XX
1486static int __initdata probe_ali14xx;
1487extern int ali14xx_init(void);
1488#endif
1489#ifdef CONFIG_BLK_DEV_UMC8672
1490static int __initdata probe_umc8672;
1491extern int umc8672_init(void);
1492#endif
1493#ifdef CONFIG_BLK_DEV_DTC2278
1494static int __initdata probe_dtc2278;
1495extern int dtc2278_init(void);
1496#endif
1497#ifdef CONFIG_BLK_DEV_HT6560B
1498static int __initdata probe_ht6560b;
1499extern int ht6560b_init(void);
1500#endif
1501#ifdef CONFIG_BLK_DEV_QD65XX
1502static int __initdata probe_qd65xx;
1503extern int qd65xx_init(void);
1504#endif
1505
1506static int __initdata is_chipset_set[MAX_HWIFS];
1507
1508/*
1509 * ide_setup() gets called VERY EARLY during initialization,
1510 * to handle kernel "command line" strings beginning with "hdx=" or "ide".
1511 *
1512 * Remember to update Documentation/ide.txt if you change something here.
1513 */
1514static int __init ide_setup(char *s)
1515{
1516 int i, vals[3];
1517 ide_hwif_t *hwif;
1518 ide_drive_t *drive;
1519 unsigned int hw, unit;
1520 const char max_drive = 'a' + ((MAX_HWIFS * MAX_DRIVES) - 1);
1521 const char max_hwif = '0' + (MAX_HWIFS - 1);
1522
1523
1524 if (strncmp(s,"hd",2) == 0 && s[2] == '=') /* hd= is for hd.c */
1525 return 0; /* driver and not us */
1526
1527 if (strncmp(s,"ide",3) && strncmp(s,"idebus",6) && strncmp(s,"hd",2))
1528 return 0;
1529
1530 printk(KERN_INFO "ide_setup: %s", s);
1531 init_ide_data ();
1532
1533#ifdef CONFIG_BLK_DEV_IDEDOUBLER
1534 if (!strcmp(s, "ide=doubler")) {
1535 extern int ide_doubler;
1536
1537 printk(" : Enabled support for IDE doublers\n");
1538 ide_doubler = 1;
1539 return 1;
1540 }
1541#endif /* CONFIG_BLK_DEV_IDEDOUBLER */
1542
1543 if (!strcmp(s, "ide=nodma")) {
1544 printk(" : Prevented DMA\n");
1545 noautodma = 1;
1546 return 1;
1547 }
1548
1549#ifdef CONFIG_BLK_DEV_IDEPCI
1550 if (!strcmp(s, "ide=reverse")) {
1551 ide_scan_direction = 1;
1552 printk(" : Enabled support for IDE inverse scan order.\n");
1553 return 1;
1554 }
1555#endif /* CONFIG_BLK_DEV_IDEPCI */
1556
1557 /*
1558 * Look for drive options: "hdx="
1559 */
1560 if (s[0] == 'h' && s[1] == 'd' && s[2] >= 'a' && s[2] <= max_drive) {
1561 const char *hd_words[] = {
1562 "none", "noprobe", "nowerr", "cdrom", "serialize",
1563 "autotune", "noautotune", "minus8", "swapdata", "bswap",
1564 "minus11", "remap", "remap63", "scsi", NULL };
1565 unit = s[2] - 'a';
1566 hw = unit / MAX_DRIVES;
1567 unit = unit % MAX_DRIVES;
1568 hwif = &ide_hwifs[hw];
1569 drive = &hwif->drives[unit];
1570 if (strncmp(s + 4, "ide-", 4) == 0) {
1571 strlcpy(drive->driver_req, s + 4, sizeof(drive->driver_req));
1572 goto done;
1573 }
1574 switch (match_parm(&s[3], hd_words, vals, 3)) {
1575 case -1: /* "none" */
1576 case -2: /* "noprobe" */
1577 drive->noprobe = 1;
1578 goto done;
1579 case -3: /* "nowerr" */
1580 drive->bad_wstat = BAD_R_STAT;
1581 hwif->noprobe = 0;
1582 goto done;
1583 case -4: /* "cdrom" */
1584 drive->present = 1;
1585 drive->media = ide_cdrom;
1586 /* an ATAPI device ignores DRDY */
1587 drive->ready_stat = 0;
1588 hwif->noprobe = 0;
1589 goto done;
1590 case -5: /* "serialize" */
1591 printk(" -- USE \"ide%d=serialize\" INSTEAD", hw);
1592 goto do_serialize;
1593 case -6: /* "autotune" */
1594 drive->autotune = IDE_TUNE_AUTO;
1595 goto obsolete_option;
1596 case -7: /* "noautotune" */
1597 drive->autotune = IDE_TUNE_NOAUTO;
1598 goto obsolete_option;
1599 case -9: /* "swapdata" */
1600 case -10: /* "bswap" */
1601 drive->bswap = 1;
1602 goto done;
1603 case -12: /* "remap" */
1604 drive->remap_0_to_1 = 1;
1605 goto done;
1606 case -13: /* "remap63" */
1607 drive->sect0 = 63;
1608 goto done;
1609 case -14: /* "scsi" */
1610 drive->scsi = 1;
1611 goto done;
1612 case 3: /* cyl,head,sect */
1613 drive->media = ide_disk;
1614 drive->ready_stat = READY_STAT;
1615 drive->cyl = drive->bios_cyl = vals[0];
1616 drive->head = drive->bios_head = vals[1];
1617 drive->sect = drive->bios_sect = vals[2];
1618 drive->present = 1;
1619 drive->forced_geom = 1;
1620 hwif->noprobe = 0;
1621 goto done;
1622 default:
1623 goto bad_option;
1624 }
1625 }
1626
1627 if (s[0] != 'i' || s[1] != 'd' || s[2] != 'e')
1628 goto bad_option;
1629 /*
1630 * Look for bus speed option: "idebus="
1631 */
1632 if (s[3] == 'b' && s[4] == 'u' && s[5] == 's') {
1633 if (match_parm(&s[6], NULL, vals, 1) != 1)
1634 goto bad_option;
1635 if (vals[0] >= 20 && vals[0] <= 66) {
1636 idebus_parameter = vals[0];
1637 } else
1638 printk(" -- BAD BUS SPEED! Expected value from 20 to 66");
1639 goto done;
1640 }
1641 /*
1642 * Look for interface options: "idex="
1643 */
1644 if (s[3] >= '0' && s[3] <= max_hwif) {
1645 /*
1646 * Be VERY CAREFUL changing this: note hardcoded indexes below
1647 * (-8, -9, -10) are reserved to ease the hardcoding.
1648 */
1649 static const char *ide_words[] = {
1650 "noprobe", "serialize", "autotune", "noautotune",
1651 "reset", "dma", "ata66", "minus8", "minus9",
1652 "minus10", "four", "qd65xx", "ht6560b", "cmd640_vlb",
1653 "dtc2278", "umc8672", "ali14xx", NULL };
1654 hw = s[3] - '0';
1655 hwif = &ide_hwifs[hw];
1656 i = match_parm(&s[4], ide_words, vals, 3);
1657
1658 /*
1659 * Cryptic check to ensure chipset not already set for hwif.
1660 * Note: we can't depend on hwif->chipset here.
1661 */
1662 if ((i >= -18 && i <= -11) || (i > 0 && i <= 3)) {
1663 /* chipset already specified */
1664 if (is_chipset_set[hw])
1665 goto bad_option;
1666 if (i > -18 && i <= -11) {
1667 /* these drivers are for "ide0=" only */
1668 if (hw != 0)
1669 goto bad_hwif;
1670 /* chipset already specified for 2nd port */
1671 if (is_chipset_set[hw+1])
1672 goto bad_option;
1673 }
1674 is_chipset_set[hw] = 1;
1675 printk("\n");
1676 }
1677
1678 switch (i) {
1679#ifdef CONFIG_BLK_DEV_ALI14XX
1680 case -17: /* "ali14xx" */
1681 probe_ali14xx = 1;
1682 goto done;
1683#endif
1684#ifdef CONFIG_BLK_DEV_UMC8672
1685 case -16: /* "umc8672" */
1686 probe_umc8672 = 1;
1687 goto done;
1688#endif
1689#ifdef CONFIG_BLK_DEV_DTC2278
1690 case -15: /* "dtc2278" */
1691 probe_dtc2278 = 1;
1692 goto done;
1693#endif
1694#ifdef CONFIG_BLK_DEV_CMD640
1695 case -14: /* "cmd640_vlb" */
1696 {
1697 extern int cmd640_vlb; /* flag for cmd640.c */
1698 cmd640_vlb = 1;
1699 goto done;
1700 }
1701#endif
1702#ifdef CONFIG_BLK_DEV_HT6560B
1703 case -13: /* "ht6560b" */
1704 probe_ht6560b = 1;
1705 goto done;
1706#endif
1707#ifdef CONFIG_BLK_DEV_QD65XX
1708 case -12: /* "qd65xx" */
1709 probe_qd65xx = 1;
1710 goto done;
1711#endif
1712#ifdef CONFIG_BLK_DEV_4DRIVES
1713 case -11: /* "four" drives on one set of ports */
1714 {
1715 ide_hwif_t *mate = &ide_hwifs[hw^1];
1716 mate->drives[0].select.all ^= 0x20;
1717 mate->drives[1].select.all ^= 0x20;
1718 hwif->chipset = mate->chipset = ide_4drives;
1719 mate->irq = hwif->irq;
1720 memcpy(mate->io_ports, hwif->io_ports, sizeof(hwif->io_ports));
1721 goto do_serialize;
1722 }
1723#endif /* CONFIG_BLK_DEV_4DRIVES */
1724 case -10: /* minus10 */
1725 case -9: /* minus9 */
1726 case -8: /* minus8 */
1727 goto bad_option;
1728 case -7: /* ata66 */
1729#ifdef CONFIG_BLK_DEV_IDEPCI
1730 hwif->udma_four = 1;
1731 goto obsolete_option;
1732#else
1733 goto bad_hwif;
1734#endif
1735 case -6: /* dma */
1736 hwif->autodma = 1;
1737 goto obsolete_option;
1738 case -5: /* "reset" */
1739 hwif->reset = 1;
1740 goto obsolete_option;
1741 case -4: /* "noautotune" */
1742 hwif->drives[0].autotune = IDE_TUNE_NOAUTO;
1743 hwif->drives[1].autotune = IDE_TUNE_NOAUTO;
1744 goto obsolete_option;
1745 case -3: /* "autotune" */
1746 hwif->drives[0].autotune = IDE_TUNE_AUTO;
1747 hwif->drives[1].autotune = IDE_TUNE_AUTO;
1748 goto obsolete_option;
1749 case -2: /* "serialize" */
1750 do_serialize:
1751 hwif->mate = &ide_hwifs[hw^1];
1752 hwif->mate->mate = hwif;
1753 hwif->serialized = hwif->mate->serialized = 1;
1754 goto obsolete_option;
1755
1756 case -1: /* "noprobe" */
1757 hwif->noprobe = 1;
1758 goto done;
1759
1760 case 1: /* base */
1761 vals[1] = vals[0] + 0x206; /* default ctl */
1762 case 2: /* base,ctl */
1763 vals[2] = 0; /* default irq = probe for it */
1764 case 3: /* base,ctl,irq */
1765 hwif->hw.irq = vals[2];
1766 ide_init_hwif_ports(&hwif->hw, (unsigned long) vals[0], (unsigned long) vals[1], &hwif->irq);
1767 memcpy(hwif->io_ports, hwif->hw.io_ports, sizeof(hwif->io_ports));
1768 hwif->irq = vals[2];
1769 hwif->noprobe = 0;
1770 hwif->chipset = ide_forced;
1771 goto obsolete_option;
1772
1773 case 0: goto bad_option;
1774 default:
1775 printk(" -- SUPPORT NOT CONFIGURED IN THIS KERNEL\n");
1776 return 1;
1777 }
1778 }
1779bad_option:
1780 printk(" -- BAD OPTION\n");
1781 return 1;
1782obsolete_option:
1783 printk(" -- OBSOLETE OPTION, WILL BE REMOVED SOON!\n");
1784 return 1;
1785bad_hwif:
1786 printk("-- NOT SUPPORTED ON ide%d", hw);
1787done:
1788 printk("\n");
1789 return 1;
1790}
1791
1792extern void pnpide_init(void);
1793extern void h8300_ide_init(void);
1794
1795/*
1796 * probe_for_hwifs() finds/initializes "known" IDE interfaces
1797 */
1798static void __init probe_for_hwifs (void)
1799{
1800#ifdef CONFIG_BLK_DEV_IDEPCI
1801 ide_scan_pcibus(ide_scan_direction);
1802#endif /* CONFIG_BLK_DEV_IDEPCI */
1803
1804#ifdef CONFIG_ETRAX_IDE
1805 {
1806 extern void init_e100_ide(void);
1807 init_e100_ide();
1808 }
1809#endif /* CONFIG_ETRAX_IDE */
1810#ifdef CONFIG_BLK_DEV_CMD640
1811 {
1812 extern void ide_probe_for_cmd640x(void);
1813 ide_probe_for_cmd640x();
1814 }
1815#endif /* CONFIG_BLK_DEV_CMD640 */
1816#ifdef CONFIG_BLK_DEV_IDE_PMAC
1817 {
1818 extern void pmac_ide_probe(void);
1819 pmac_ide_probe();
1820 }
1821#endif /* CONFIG_BLK_DEV_IDE_PMAC */
1822#ifdef CONFIG_BLK_DEV_GAYLE
1823 {
1824 extern void gayle_init(void);
1825 gayle_init();
1826 }
1827#endif /* CONFIG_BLK_DEV_GAYLE */
1828#ifdef CONFIG_BLK_DEV_FALCON_IDE
1829 {
1830 extern void falconide_init(void);
1831 falconide_init();
1832 }
1833#endif /* CONFIG_BLK_DEV_FALCON_IDE */
1834#ifdef CONFIG_BLK_DEV_MAC_IDE
1835 {
1836 extern void macide_init(void);
1837 macide_init();
1838 }
1839#endif /* CONFIG_BLK_DEV_MAC_IDE */
1840#ifdef CONFIG_BLK_DEV_Q40IDE
1841 {
1842 extern void q40ide_init(void);
1843 q40ide_init();
1844 }
1845#endif /* CONFIG_BLK_DEV_Q40IDE */
1846#ifdef CONFIG_BLK_DEV_BUDDHA
1847 {
1848 extern void buddha_init(void);
1849 buddha_init();
1850 }
1851#endif /* CONFIG_BLK_DEV_BUDDHA */
1852#ifdef CONFIG_BLK_DEV_IDEPNP
1853 pnpide_init();
1854#endif
1855#ifdef CONFIG_H8300
1856 h8300_ide_init();
1857#endif
1858}
1859
Bartlomiej Zolnierkiewicz8604aff2005-05-26 14:55:34 +02001860void ide_register_subdriver(ide_drive_t *drive, ide_driver_t *driver)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001861{
Linus Torvalds1da177e2005-04-16 15:20:36 -07001862#ifdef CONFIG_PROC_FS
Bartlomiej Zolnierkiewicz8604aff2005-05-26 14:55:34 +02001863 ide_add_proc_entries(drive->proc, driver->proc, drive);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001864#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07001865}
1866
1867EXPORT_SYMBOL(ide_register_subdriver);
1868
1869/**
1870 * ide_unregister_subdriver - disconnect drive from driver
1871 * @drive: drive to unplug
Bartlomiej Zolnierkiewicz8604aff2005-05-26 14:55:34 +02001872 * @driver: driver
Linus Torvalds1da177e2005-04-16 15:20:36 -07001873 *
1874 * Disconnect a drive from the driver it was attached to and then
1875 * clean up the various proc files and other objects attached to it.
1876 *
Bartlomiej Zolnierkiewicz8604aff2005-05-26 14:55:34 +02001877 * Takes ide_setting_sem and ide_lock.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001878 * Caller must hold none of the locks.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001879 */
1880
Bartlomiej Zolnierkiewicz8604aff2005-05-26 14:55:34 +02001881void ide_unregister_subdriver(ide_drive_t *drive, ide_driver_t *driver)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001882{
1883 unsigned long flags;
1884
1885 down(&ide_setting_sem);
1886 spin_lock_irqsave(&ide_lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001887#ifdef CONFIG_PROC_FS
Bartlomiej Zolnierkiewicz8604aff2005-05-26 14:55:34 +02001888 ide_remove_proc_entries(drive->proc, driver->proc);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001889#endif
1890 auto_remove_settings(drive);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001891 spin_unlock_irqrestore(&ide_lock, flags);
1892 up(&ide_setting_sem);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001893}
1894
1895EXPORT_SYMBOL(ide_unregister_subdriver);
1896
Linus Torvalds1da177e2005-04-16 15:20:36 -07001897/*
1898 * Probe module
1899 */
1900
1901EXPORT_SYMBOL(ide_lock);
1902
Bartlomiej Zolnierkiewicz8604aff2005-05-26 14:55:34 +02001903static int ide_bus_match(struct device *dev, struct device_driver *drv)
1904{
1905 return 1;
1906}
1907
Linus Torvalds1da177e2005-04-16 15:20:36 -07001908struct bus_type ide_bus_type = {
1909 .name = "ide",
Bartlomiej Zolnierkiewicz8604aff2005-05-26 14:55:34 +02001910 .match = ide_bus_match,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001911 .suspend = generic_ide_suspend,
1912 .resume = generic_ide_resume,
1913};
1914
Bartlomiej Zolnierkiewicz8604aff2005-05-26 14:55:34 +02001915EXPORT_SYMBOL_GPL(ide_bus_type);
1916
Linus Torvalds1da177e2005-04-16 15:20:36 -07001917/*
1918 * This is gets invoked once during initialization, to set *everything* up
1919 */
1920static int __init ide_init(void)
1921{
1922 printk(KERN_INFO "Uniform Multi-Platform E-IDE driver " REVISION "\n");
1923 devfs_mk_dir("ide");
1924 system_bus_speed = ide_system_bus_speed();
1925
1926 bus_register(&ide_bus_type);
1927
1928 init_ide_data();
1929
1930#ifdef CONFIG_PROC_FS
1931 proc_ide_root = proc_mkdir("ide", NULL);
1932#endif
1933
1934#ifdef CONFIG_BLK_DEV_ALI14XX
1935 if (probe_ali14xx)
1936 (void)ali14xx_init();
1937#endif
1938#ifdef CONFIG_BLK_DEV_UMC8672
1939 if (probe_umc8672)
1940 (void)umc8672_init();
1941#endif
1942#ifdef CONFIG_BLK_DEV_DTC2278
1943 if (probe_dtc2278)
1944 (void)dtc2278_init();
1945#endif
1946#ifdef CONFIG_BLK_DEV_HT6560B
1947 if (probe_ht6560b)
1948 (void)ht6560b_init();
1949#endif
1950#ifdef CONFIG_BLK_DEV_QD65XX
1951 if (probe_qd65xx)
1952 (void)qd65xx_init();
1953#endif
1954
1955 initializing = 1;
1956 /* Probe for special PCI and other "known" interface chipsets. */
1957 probe_for_hwifs();
1958 initializing = 0;
1959
1960#ifdef CONFIG_PROC_FS
1961 proc_ide_create();
1962#endif
1963 return 0;
1964}
1965
1966#ifdef MODULE
1967static char *options = NULL;
1968module_param(options, charp, 0);
1969MODULE_LICENSE("GPL");
1970
1971static void __init parse_options (char *line)
1972{
1973 char *next = line;
1974
1975 if (line == NULL || !*line)
1976 return;
1977 while ((line = next) != NULL) {
1978 if ((next = strchr(line,' ')) != NULL)
1979 *next++ = 0;
1980 if (!ide_setup(line))
1981 printk (KERN_INFO "Unknown option '%s'\n", line);
1982 }
1983}
1984
1985int init_module (void)
1986{
1987 parse_options(options);
1988 return ide_init();
1989}
1990
1991void cleanup_module (void)
1992{
1993 int index;
1994
1995 for (index = 0; index < MAX_HWIFS; ++index)
1996 ide_unregister(index);
1997
1998#ifdef CONFIG_PROC_FS
1999 proc_ide_destroy();
2000#endif
2001 devfs_remove("ide");
2002
2003 bus_unregister(&ide_bus_type);
2004}
2005
2006#else /* !MODULE */
2007
2008__setup("", ide_setup);
2009
2010module_init(ide_init);
2011
2012#endif /* MODULE */