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[linux-2.6-block.git] / drivers / ide / ide.c
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1da177e4
LT		 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/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
1da177e4
LT		 199/*
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
f36d4024 225 init_completion(&hwif->gendev_rel_comp);
1da177e4
LT		 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;
1da177e4
LT		 245 drive->vdma = 0;
246 INIT_LIST_HEAD(&drive->list);
f36d4024 247 init_completion(&drive->gendev_rel_comp);
1da177e4
LT		 248 }
249}
250
251static void init_hwif_default(ide_hwif_t *hwif, unsigned int index)
252{
253 hw_regs_t hw;
254
255 memset(&hw, 0, sizeof(hw_regs_t));
256
257 ide_init_hwif_ports(&hw, ide_default_io_base(index), 0, &hwif->irq);
258
259 memcpy(&hwif->hw, &hw, sizeof(hw));
260 memcpy(hwif->io_ports, hw.io_ports, sizeof(hw.io_ports));
261
262 hwif->noprobe = !hwif->io_ports[IDE_DATA_OFFSET];
263#ifdef CONFIG_BLK_DEV_HD
264 if (hwif->io_ports[IDE_DATA_OFFSET] == HD_DATA)
265 hwif->noprobe = 1; /* may be overridden by ide_setup() */
266#endif
267}
268
269extern void ide_arm_init(void);
270
271/*
272 * init_ide_data() sets reasonable default values into all fields
273 * of all instances of the hwifs and drives, but only on the first call.
274 * Subsequent calls have no effect (they don't wipe out anything).
275 *
276 * This routine is normally called at driver initialization time,
277 * but may also be called MUCH earlier during kernel "command-line"
278 * parameter processing. As such, we cannot depend on any other parts
279 * of the kernel (such as memory allocation) to be functioning yet.
280 *
281 * This is too bad, as otherwise we could dynamically allocate the
282 * ide_drive_t structs as needed, rather than always consuming memory
283 * for the max possible number (MAX_HWIFS * MAX_DRIVES) of them.
284 *
285 * FIXME: We should stuff the setup data into __init and copy the
286 * relevant hwifs/allocate them properly during boot.
287 */
288#define MAGIC_COOKIE 0x12345678
289static void __init init_ide_data (void)
290{
291 ide_hwif_t *hwif;
292 unsigned int index;
293 static unsigned long magic_cookie = MAGIC_COOKIE;
294
295 if (magic_cookie != MAGIC_COOKIE)
296 return; /* already initialized */
297 magic_cookie = 0;
298
299 /* Initialise all interface structures */
300 for (index = 0; index < MAX_HWIFS; ++index) {
301 hwif = &ide_hwifs[index];
302 init_hwif_data(hwif, index);
303 init_hwif_default(hwif, index);
304#if !defined(CONFIG_PPC32) || !defined(CONFIG_PCI)
305 hwif->irq = hwif->hw.irq =
306 ide_init_default_irq(hwif->io_ports[IDE_DATA_OFFSET]);
307#endif
308 }
309#ifdef CONFIG_IDE_ARM
310 initializing = 1;
311 ide_arm_init();
312 initializing = 0;
313#endif
314}
315
316/**
317 * ide_system_bus_speed - guess bus speed
318 *
319 * ide_system_bus_speed() returns what we think is the system VESA/PCI
320 * bus speed (in MHz). This is used for calculating interface PIO timings.
321 * The default is 40 for known PCI systems, 50 otherwise.
322 * The "idebus=xx" parameter can be used to override this value.
323 * The actual value to be used is computed/displayed the first time
324 * through. Drivers should only use this as a last resort.
325 *
326 * Returns a guessed speed in MHz.
327 */
328
329static int ide_system_bus_speed(void)
330{
331#ifdef CONFIG_PCI
332 static struct pci_device_id pci_default[] = {
333 { PCI_DEVICE(PCI_ANY_ID, PCI_ANY_ID) },
334 { }
335 };
336#else
337#define pci_default 0
338#endif /* CONFIG_PCI */
339
340 if (!system_bus_speed) {
341 if (idebus_parameter) {
342 /* user supplied value */
343 system_bus_speed = idebus_parameter;
344 } else if (pci_dev_present(pci_default)) {
345 /* safe default value for PCI */
346 system_bus_speed = 33;
347 } else {
348 /* safe default value for VESA and PCI */
349 system_bus_speed = 50;
350 }
351 printk(KERN_INFO "ide: Assuming %dMHz system bus speed "
352 "for PIO modes%s\n", system_bus_speed,
353 idebus_parameter ? "" : "; override with idebus=xx");
354 }
355 return system_bus_speed;
356}
357
1da177e4
LT		 358#ifdef CONFIG_PROC_FS
359struct proc_dir_entry *proc_ide_root;
360#endif
361
362static struct resource* hwif_request_region(ide_hwif_t *hwif,
363 unsigned long addr, int num)
364{
365 struct resource *res = request_region(addr, num, hwif->name);
366
367 if (!res)
368 printk(KERN_ERR "%s: I/O resource 0x%lX-0x%lX not free.\n",
369 hwif->name, addr, addr+num-1);
370 return res;
371}
372
373/**
374 * ide_hwif_request_regions - request resources for IDE
375 * @hwif: interface to use
376 *
377 * Requests all the needed resources for an interface.
378 * Right now core IDE code does this work which is deeply wrong.
379 * MMIO leaves it to the controller driver,
380 * PIO will migrate this way over time.
381 */
382
383int ide_hwif_request_regions(ide_hwif_t *hwif)
384{
385 unsigned long addr;
386 unsigned int i;
387
388 if (hwif->mmio == 2)
389 return 0;
390 BUG_ON(hwif->mmio == 1);
391 addr = hwif->io_ports[IDE_CONTROL_OFFSET];
392 if (addr && !hwif_request_region(hwif, addr, 1))
393 goto control_region_busy;
394 hwif->straight8 = 0;
395 addr = hwif->io_ports[IDE_DATA_OFFSET];
396 if ((addr | 7) == hwif->io_ports[IDE_STATUS_OFFSET]) {
397 if (!hwif_request_region(hwif, addr, 8))
398 goto data_region_busy;
399 hwif->straight8 = 1;
400 return 0;
401 }
402 for (i = IDE_DATA_OFFSET; i <= IDE_STATUS_OFFSET; i++) {
403 addr = hwif->io_ports[i];
404 if (!hwif_request_region(hwif, addr, 1)) {
405 while (--i)
406 release_region(addr, 1);
407 goto data_region_busy;
408 }
409 }
410 return 0;
411
412data_region_busy:
413 addr = hwif->io_ports[IDE_CONTROL_OFFSET];
414 if (addr)
415 release_region(addr, 1);
416control_region_busy:
417 /* If any errors are return, we drop the hwif interface. */
418 return -EBUSY;
419}
420
421/**
422 * ide_hwif_release_regions - free IDE resources
423 *
424 * Note that we only release the standard ports,
425 * and do not even try to handle any extra ports
426 * allocated for weird IDE interface chipsets.
427 *
428 * Note also that we don't yet handle mmio resources here. More
429 * importantly our caller should be doing this so we need to
430 * restructure this as a helper function for drivers.
431 */
432
433void ide_hwif_release_regions(ide_hwif_t *hwif)
434{
435 u32 i = 0;
436
437 if (hwif->mmio == 2)
438 return;
439 if (hwif->io_ports[IDE_CONTROL_OFFSET])
440 release_region(hwif->io_ports[IDE_CONTROL_OFFSET], 1);
441 if (hwif->straight8) {
442 release_region(hwif->io_ports[IDE_DATA_OFFSET], 8);
443 return;
444 }
445 for (i = IDE_DATA_OFFSET; i <= IDE_STATUS_OFFSET; i++)
446 if (hwif->io_ports[i])
447 release_region(hwif->io_ports[i], 1);
448}
449
450/**
451 * ide_hwif_restore - restore hwif to template
452 * @hwif: hwif to update
453 * @tmp_hwif: template
454 *
455 * Restore hwif to a previous state by copying most settngs
456 * from the template.
457 */
458
459static void ide_hwif_restore(ide_hwif_t *hwif, ide_hwif_t *tmp_hwif)
460{
461 hwif->hwgroup = tmp_hwif->hwgroup;
462
463 hwif->gendev.parent = tmp_hwif->gendev.parent;
464
465 hwif->proc = tmp_hwif->proc;
466
467 hwif->major = tmp_hwif->major;
468 hwif->straight8 = tmp_hwif->straight8;
469 hwif->bus_state = tmp_hwif->bus_state;
470
471 hwif->atapi_dma = tmp_hwif->atapi_dma;
472 hwif->ultra_mask = tmp_hwif->ultra_mask;
473 hwif->mwdma_mask = tmp_hwif->mwdma_mask;
474 hwif->swdma_mask = tmp_hwif->swdma_mask;
475
476 hwif->chipset = tmp_hwif->chipset;
477 hwif->hold = tmp_hwif->hold;
478
479#ifdef CONFIG_BLK_DEV_IDEPCI
480 hwif->pci_dev = tmp_hwif->pci_dev;
481 hwif->cds = tmp_hwif->cds;
482#endif
483
484 hwif->tuneproc = tmp_hwif->tuneproc;
485 hwif->speedproc = tmp_hwif->speedproc;
486 hwif->selectproc = tmp_hwif->selectproc;
487 hwif->reset_poll = tmp_hwif->reset_poll;
488 hwif->pre_reset = tmp_hwif->pre_reset;
489 hwif->resetproc = tmp_hwif->resetproc;
490 hwif->intrproc = tmp_hwif->intrproc;
491 hwif->maskproc = tmp_hwif->maskproc;
492 hwif->quirkproc = tmp_hwif->quirkproc;
493 hwif->busproc = tmp_hwif->busproc;
494
495 hwif->ata_input_data = tmp_hwif->ata_input_data;
496 hwif->ata_output_data = tmp_hwif->ata_output_data;
497 hwif->atapi_input_bytes = tmp_hwif->atapi_input_bytes;
498 hwif->atapi_output_bytes = tmp_hwif->atapi_output_bytes;
499
500 hwif->dma_setup = tmp_hwif->dma_setup;
501 hwif->dma_exec_cmd = tmp_hwif->dma_exec_cmd;
502 hwif->dma_start = tmp_hwif->dma_start;
503 hwif->ide_dma_end = tmp_hwif->ide_dma_end;
504 hwif->ide_dma_check = tmp_hwif->ide_dma_check;
505 hwif->ide_dma_on = tmp_hwif->ide_dma_on;
506 hwif->ide_dma_off_quietly = tmp_hwif->ide_dma_off_quietly;
507 hwif->ide_dma_test_irq = tmp_hwif->ide_dma_test_irq;
508 hwif->ide_dma_host_on = tmp_hwif->ide_dma_host_on;
509 hwif->ide_dma_host_off = tmp_hwif->ide_dma_host_off;
510 hwif->ide_dma_lostirq = tmp_hwif->ide_dma_lostirq;
511 hwif->ide_dma_timeout = tmp_hwif->ide_dma_timeout;
512
513 hwif->OUTB = tmp_hwif->OUTB;
514 hwif->OUTBSYNC = tmp_hwif->OUTBSYNC;
515 hwif->OUTW = tmp_hwif->OUTW;
516 hwif->OUTL = tmp_hwif->OUTL;
517 hwif->OUTSW = tmp_hwif->OUTSW;
518 hwif->OUTSL = tmp_hwif->OUTSL;
519
520 hwif->INB = tmp_hwif->INB;
521 hwif->INW = tmp_hwif->INW;
522 hwif->INL = tmp_hwif->INL;
523 hwif->INSW = tmp_hwif->INSW;
524 hwif->INSL = tmp_hwif->INSL;
525
526 hwif->sg_max_nents = tmp_hwif->sg_max_nents;
527
528 hwif->mmio = tmp_hwif->mmio;
529 hwif->rqsize = tmp_hwif->rqsize;
530 hwif->no_lba48 = tmp_hwif->no_lba48;
531
532#ifndef CONFIG_BLK_DEV_IDECS
533 hwif->irq = tmp_hwif->irq;
534#endif
535
536 hwif->dma_base = tmp_hwif->dma_base;
537 hwif->dma_master = tmp_hwif->dma_master;
538 hwif->dma_command = tmp_hwif->dma_command;
539 hwif->dma_vendor1 = tmp_hwif->dma_vendor1;
540 hwif->dma_status = tmp_hwif->dma_status;
541 hwif->dma_vendor3 = tmp_hwif->dma_vendor3;
542 hwif->dma_prdtable = tmp_hwif->dma_prdtable;
543
544 hwif->dma_extra = tmp_hwif->dma_extra;
545 hwif->config_data = tmp_hwif->config_data;
546 hwif->select_data = tmp_hwif->select_data;
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 interfce will not be reopened (present/vanishing locking
569 * isnt 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
576void 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;
8604affd 582 int irq_count = 0, unit;
1da177e4
LT		 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];
8604affd
BZ		 595 if (!drive->present) {
596 if (drive->devfs_name[0] != '\0') {
597 devfs_remove(drive->devfs_name);
598 drive->devfs_name[0] = '\0';
599 }
1da177e4 600 continue;
8604affd
BZ		 601 }
602 spin_unlock_irq(&ide_lock);
603 device_unregister(&drive->gendev);
f36d4024 604 wait_for_completion(&drive->gendev_rel_comp);
8604affd 605 spin_lock_irq(&ide_lock);
1da177e4
LT		 606 }
607 hwif->present = 0;
608
609 spin_unlock_irq(&ide_lock);
610
1da177e4
LT		 611 destroy_proc_ide_interface(hwif);
612
613 hwgroup = hwif->hwgroup;
614 /*
615 * free the irq if we were the only hwif using it
616 */
617 g = hwgroup->hwif;
618 do {
619 if (g->irq == hwif->irq)
620 ++irq_count;
621 g = g->next;
622 } while (g != hwgroup->hwif);
623 if (irq_count == 1)
624 free_irq(hwif->irq, hwgroup);
625
626 spin_lock_irq(&ide_lock);
627 /*
628 * Note that we only release the standard ports,
629 * and do not even try to handle any extra ports
630 * allocated for weird IDE interface chipsets.
631 */
632 ide_hwif_release_regions(hwif);
633
634 /*
635 * Remove us from the hwgroup, and free
636 * the hwgroup if we were the only member
637 */
1da177e4
LT		 638 if (hwif->next == hwif) {
639 BUG_ON(hwgroup->hwif != hwif);
640 kfree(hwgroup);
641 } else {
642 /* There is another interface in hwgroup.
643 * Unlink us, and set hwgroup->drive and ->hwif to
644 * something sane.
645 */
646 g = hwgroup->hwif;
647 while (g->next != hwif)
648 g = g->next;
649 g->next = hwif->next;
650 if (hwgroup->hwif == hwif) {
651 /* Chose a random hwif for hwgroup->hwif.
652 * It's guaranteed that there are no drives
653 * left in the hwgroup.
654 */
655 BUG_ON(hwgroup->drive != NULL);
656 hwgroup->hwif = g;
657 }
658 BUG_ON(hwgroup->hwif == hwif);
659 }
660
661 /* More messed up locking ... */
662 spin_unlock_irq(&ide_lock);
663 device_unregister(&hwif->gendev);
f36d4024 664 wait_for_completion(&hwif->gendev_rel_comp);
1da177e4
LT		 665
666 /*
667 * Remove us from the kernel's knowledge
668 */
669 blk_unregister_region(MKDEV(hwif->major, 0), MAX_DRIVES<<PARTN_BITS);
670 kfree(hwif->sg_table);
671 unregister_blkdev(hwif->major, hwif->name);
672 spin_lock_irq(&ide_lock);
673
674 if (hwif->dma_base) {
675 (void) ide_release_dma(hwif);
676
677 hwif->dma_base = 0;
678 hwif->dma_master = 0;
679 hwif->dma_command = 0;
680 hwif->dma_vendor1 = 0;
681 hwif->dma_status = 0;
682 hwif->dma_vendor3 = 0;
683 hwif->dma_prdtable = 0;
684 }
685
686 /* copy original settings */
687 tmp_hwif = *hwif;
688
689 /* restore hwif data to pristine status */
690 init_hwif_data(hwif, index);
691 init_hwif_default(hwif, index);
692
693 ide_hwif_restore(hwif, &tmp_hwif);
694
695abort:
696 spin_unlock_irq(&ide_lock);
697 up(&ide_cfg_sem);
698}
699
700EXPORT_SYMBOL(ide_unregister);
701
702
703/**
704 * ide_setup_ports - set up IDE interface ports
705 * @hw: register descriptions
706 * @base: base register
707 * @offsets: table of register offsets
708 * @ctrl: control register
709 * @ack_irq: IRQ ack
710 * @irq: interrupt lie
711 *
712 * Setup hw_regs_t structure described by parameters. You
713 * may set up the hw structure yourself OR use this routine to
714 * do it for you. This is basically a helper
715 *
716 */
717
718void ide_setup_ports ( hw_regs_t *hw,
719 unsigned long base, int *offsets,
720 unsigned long ctrl, unsigned long intr,
721 ide_ack_intr_t *ack_intr,
722/*
723 * ide_io_ops_t *iops,
724 */
725 int irq)
726{
727 int i;
728
2c3e0262 729 memset(hw, 0, sizeof(hw_regs_t));
1da177e4
LT		 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;
4349d5cd 806 hwif->gendev.parent = hw->dev;
1da177e4
LT		 807
808 if (!initializing) {
809 probe_hwif_init_with_fixup(hwif, fixup);
810 create_proc_ide_interfaces();
811 }
812
813 if (hwifp)
814 *hwifp = hwif;
815
816 return (initializing || hwif->present) ? index : -1;
817}
818
819EXPORT_SYMBOL(ide_register_hw_with_fixup);
820
821int ide_register_hw(hw_regs_t *hw, ide_hwif_t **hwifp)
822{
823 return ide_register_hw_with_fixup(hw, hwifp, NULL);
824}
825
826EXPORT_SYMBOL(ide_register_hw);
827
828/*
829 * Locks for IDE setting functionality
830 */
831
832DECLARE_MUTEX(ide_setting_sem);
833
834/**
835 * __ide_add_setting - add an ide setting option
836 * @drive: drive to use
837 * @name: setting name
838 * @rw: true if the function is read write
839 * @read_ioctl: function to call on read
840 * @write_ioctl: function to call on write
841 * @data_type: type of data
842 * @min: range minimum
843 * @max: range maximum
844 * @mul_factor: multiplication scale
845 * @div_factor: divison scale
846 * @data: private data field
847 * @set: setting
848 * @auto_remove: setting auto removal flag
849 *
850 * Removes the setting named from the device if it is present.
851 * The function takes the settings_lock to protect against
852 * parallel changes. This function must not be called from IRQ
853 * context. Returns 0 on success or -1 on failure.
854 *
855 * BUGS: This code is seriously over-engineered. There is also
856 * magic about how the driver specific features are setup. If
857 * a driver is attached we assume the driver settings are auto
858 * remove.
859 */
860
861static 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)
862{
863 ide_settings_t **p = (ide_settings_t **) &drive->settings, *setting = NULL;
864
865 down(&ide_setting_sem);
866 while ((*p) && strcmp((*p)->name, name) < 0)
867 p = &((*p)->next);
f5e3c2fa 868 if ((setting = kzalloc(sizeof(*setting), GFP_KERNEL)) == NULL)
1da177e4 869 goto abort;
1da177e4
LT		 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);
6044ec88 892 kfree(setting);
1da177e4
LT		 893 return -1;
894}
895
896int 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)
897{
898 return __ide_add_setting(drive, name, rw, read_ioctl, write_ioctl, data_type, min, max, mul_factor, div_factor, data, set, 1);
899}
900
901EXPORT_SYMBOL(ide_add_setting);
902
903/**
904 * __ide_remove_setting - remove an ide setting option
905 * @drive: drive to use
906 * @name: setting name
907 *
908 * Removes the setting named from the device if it is present.
909 * The caller must hold the setting semaphore.
910 */
911
912static void __ide_remove_setting (ide_drive_t *drive, char *name)
913{
914 ide_settings_t **p, *setting;
915
916 p = (ide_settings_t **) &drive->settings;
917
918 while ((*p) && strcmp((*p)->name, name))
919 p = &((*p)->next);
920 if ((setting = (*p)) == NULL)
921 return;
922
923 (*p) = setting->next;
924
925 kfree(setting->name);
926 kfree(setting);
927}
928
929/**
930 * ide_find_setting_by_ioctl - find a drive specific ioctl
931 * @drive: drive to scan
932 * @cmd: ioctl command to handle
933 *
934 * Scan's the device setting table for a matching entry and returns
935 * this or NULL if no entry is found. The caller must hold the
936 * setting semaphore
937 */
938
939static ide_settings_t *ide_find_setting_by_ioctl (ide_drive_t *drive, int cmd)
940{
941 ide_settings_t *setting = drive->settings;
942
943 while (setting) {
944 if (setting->read_ioctl == cmd || setting->write_ioctl == cmd)
945 break;
946 setting = setting->next;
947 }
948
949 return setting;
950}
951
952/**
953 * ide_find_setting_by_name - find a drive specific setting
954 * @drive: drive to scan
955 * @name: setting name
956 *
957 * Scan's the device setting table for a matching entry and returns
958 * this or NULL if no entry is found. The caller must hold the
959 * setting semaphore
960 */
961
962ide_settings_t *ide_find_setting_by_name (ide_drive_t *drive, char *name)
963{
964 ide_settings_t *setting = drive->settings;
965
966 while (setting) {
967 if (strcmp(setting->name, name) == 0)
968 break;
969 setting = setting->next;
970 }
971 return setting;
972}
973
974/**
975 * auto_remove_settings - remove driver specific settings
976 * @drive: drive
977 *
978 * Automatically remove all the driver specific settings for this
979 * drive. This function may sleep and must not be called from IRQ
980 * context. The caller must hold ide_setting_sem.
981 */
982
983static void auto_remove_settings (ide_drive_t *drive)
984{
985 ide_settings_t *setting;
986repeat:
987 setting = drive->settings;
988 while (setting) {
989 if (setting->auto_remove) {
990 __ide_remove_setting(drive, setting->name);
991 goto repeat;
992 }
993 setting = setting->next;
994 }
995}
996
997/**
998 * ide_read_setting - read an IDE setting
999 * @drive: drive to read from
1000 * @setting: drive setting
1001 *
1002 * Read a drive setting and return the value. The caller
1003 * must hold the ide_setting_sem when making this call.
1004 *
1005 * BUGS: the data return and error are the same return value
1006 * so an error -EINVAL and true return of the same value cannot
1007 * be told apart
1008 */
1009
1010int ide_read_setting (ide_drive_t *drive, ide_settings_t *setting)
1011{
1012 int val = -EINVAL;
1013 unsigned long flags;
1014
1015 if ((setting->rw & SETTING_READ)) {
1016 spin_lock_irqsave(&ide_lock, flags);
1017 switch(setting->data_type) {
1018 case TYPE_BYTE:
1019 val = *((u8 *) setting->data);
1020 break;
1021 case TYPE_SHORT:
1022 val = *((u16 *) setting->data);
1023 break;
1024 case TYPE_INT:
1025 case TYPE_INTA:
1026 val = *((u32 *) setting->data);
1027 break;
1028 }
1029 spin_unlock_irqrestore(&ide_lock, flags);
1030 }
1031 return val;
1032}
1033
1034/**
1035 * ide_spin_wait_hwgroup - wait for group
1036 * @drive: drive in the group
1037 *
1038 * Wait for an IDE device group to go non busy and then return
1039 * holding the ide_lock which guards the hwgroup->busy status
1040 * and right to use it.
1041 */
1042
1043int ide_spin_wait_hwgroup (ide_drive_t *drive)
1044{
1045 ide_hwgroup_t *hwgroup = HWGROUP(drive);
1046 unsigned long timeout = jiffies + (3 * HZ);
1047
1048 spin_lock_irq(&ide_lock);
1049
1050 while (hwgroup->busy) {
1051 unsigned long lflags;
1052 spin_unlock_irq(&ide_lock);
1053 local_irq_set(lflags);
1054 if (time_after(jiffies, timeout)) {
1055 local_irq_restore(lflags);
1056 printk(KERN_ERR "%s: channel busy\n", drive->name);
1057 return -EBUSY;
1058 }
1059 local_irq_restore(lflags);
1060 spin_lock_irq(&ide_lock);
1061 }
1062 return 0;
1063}
1064
1065EXPORT_SYMBOL(ide_spin_wait_hwgroup);
1066
1067/**
1068 * ide_write_setting - read an IDE setting
1069 * @drive: drive to read from
1070 * @setting: drive setting
1071 * @val: value
1072 *
1073 * Write a drive setting if it is possible. The caller
1074 * must hold the ide_setting_sem when making this call.
1075 *
1076 * BUGS: the data return and error are the same return value
1077 * so an error -EINVAL and true return of the same value cannot
1078 * be told apart
1079 *
1080 * FIXME: This should be changed to enqueue a special request
1081 * to the driver to change settings, and then wait on a sema for completion.
1082 * The current scheme of polling is kludgy, though safe enough.
1083 */
1084
1085int ide_write_setting (ide_drive_t *drive, ide_settings_t *setting, int val)
1086{
1087 int i;
1088 u32 *p;
1089
1090 if (!capable(CAP_SYS_ADMIN))
1091 return -EACCES;
1092 if (!(setting->rw & SETTING_WRITE))
1093 return -EPERM;
1094 if (val < setting->min || val > setting->max)
1095 return -EINVAL;
1096 if (setting->set)
1097 return setting->set(drive, val);
1098 if (ide_spin_wait_hwgroup(drive))
1099 return -EBUSY;
1100 switch (setting->data_type) {
1101 case TYPE_BYTE:
1102 *((u8 *) setting->data) = val;
1103 break;
1104 case TYPE_SHORT:
1105 *((u16 *) setting->data) = val;
1106 break;
1107 case TYPE_INT:
1108 *((u32 *) setting->data) = val;
1109 break;
1110 case TYPE_INTA:
1111 p = (u32 *) setting->data;
1112 for (i = 0; i < 1 << PARTN_BITS; i++, p++)
1113 *p = val;
1114 break;
1115 }
1116 spin_unlock_irq(&ide_lock);
1117 return 0;
1118}
1119
1120static int set_io_32bit(ide_drive_t *drive, int arg)
1121{
1122 drive->io_32bit = arg;
1123#ifdef CONFIG_BLK_DEV_DTC2278
1124 if (HWIF(drive)->chipset == ide_dtc2278)
1125 HWIF(drive)->drives[!drive->select.b.unit].io_32bit = arg;
1126#endif /* CONFIG_BLK_DEV_DTC2278 */
1127 return 0;
1128}
1129
1130static int set_using_dma (ide_drive_t *drive, int arg)
1131{
1132#ifdef CONFIG_BLK_DEV_IDEDMA
1133 if (!drive->id || !(drive->id->capability & 1))
1134 return -EPERM;
1135 if (HWIF(drive)->ide_dma_check == NULL)
1136 return -EPERM;
1137 if (arg) {
1138 if (HWIF(drive)->ide_dma_check(drive)) return -EIO;
1139 if (HWIF(drive)->ide_dma_on(drive)) return -EIO;
1140 } else {
1141 if (__ide_dma_off(drive))
1142 return -EIO;
1143 }
1144 return 0;
1145#else
1146 return -EPERM;
1147#endif
1148}
1149
1150static int set_pio_mode (ide_drive_t *drive, int arg)
1151{
1152 struct request rq;
1153
1154 if (!HWIF(drive)->tuneproc)
1155 return -ENOSYS;
1156 if (drive->special.b.set_tune)
1157 return -EBUSY;
1158 ide_init_drive_cmd(&rq);
1159 drive->tune_req = (u8) arg;
1160 drive->special.b.set_tune = 1;
1161 (void) ide_do_drive_cmd(drive, &rq, ide_wait);
1162 return 0;
1163}
1164
1165static int set_xfer_rate (ide_drive_t *drive, int arg)
1166{
1167 int err = ide_wait_cmd(drive,
1168 WIN_SETFEATURES, (u8) arg,
1169 SETFEATURES_XFER, 0, NULL);
1170
1171 if (!err && arg) {
1172 ide_set_xfer_rate(drive, (u8) arg);
1173 ide_driveid_update(drive);
1174 }
1175 return err;
1176}
1177
1178/**
1179 * ide_add_generic_settings - generic ide settings
1180 * @drive: drive being configured
1181 *
1182 * Add the generic parts of the system settings to the /proc files and
1183 * ioctls for this IDE device. The caller must not be holding the
1184 * ide_setting_sem.
1185 */
1186
1187void ide_add_generic_settings (ide_drive_t *drive)
1188{
1189/*
1190 * drive setting name read/write access read ioctl write ioctl data type min max mul_factor div_factor data pointer set function
1191 */
1192 __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);
1193 __ide_add_setting(drive, "keepsettings", SETTING_RW, HDIO_GET_KEEPSETTINGS, HDIO_SET_KEEPSETTINGS, TYPE_BYTE, 0, 1, 1, 1, &drive->keep_settings, NULL, 0);
1194 __ide_add_setting(drive, "nice1", SETTING_RW, -1, -1, TYPE_BYTE, 0, 1, 1, 1, &drive->nice1, NULL, 0);
1195 __ide_add_setting(drive, "pio_mode", SETTING_WRITE, -1, HDIO_SET_PIO_MODE, TYPE_BYTE, 0, 255, 1, 1, NULL, set_pio_mode, 0);
1196 __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);
1197 __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);
1198 __ide_add_setting(drive, "init_speed", SETTING_RW, -1, -1, TYPE_BYTE, 0, 70, 1, 1, &drive->init_speed, NULL, 0);
1199 __ide_add_setting(drive, "current_speed", SETTING_RW, -1, -1, TYPE_BYTE, 0, 70, 1, 1, &drive->current_speed, set_xfer_rate, 0);
1200 __ide_add_setting(drive, "number", SETTING_RW, -1, -1, TYPE_BYTE, 0, 3, 1, 1, &drive->dn, NULL, 0);
1201}
1202
1203/**
1204 * system_bus_clock - clock guess
1205 *
1206 * External version of the bus clock guess used by very old IDE drivers
1207 * for things like VLB timings. Should not be used.
1208 */
1209
1210int system_bus_clock (void)
1211{
1212 return((int) ((!system_bus_speed) ? ide_system_bus_speed() : system_bus_speed ));
1213}
1214
1215EXPORT_SYMBOL(system_bus_clock);
1216
1da177e4
LT		 1217static int generic_ide_suspend(struct device *dev, pm_message_t state)
1218{
1219 ide_drive_t *drive = dev->driver_data;
1220 struct request rq;
1221 struct request_pm_state rqpm;
1222 ide_task_t args;
1223
1224 memset(&rq, 0, sizeof(rq));
1225 memset(&rqpm, 0, sizeof(rqpm));
1226 memset(&args, 0, sizeof(args));
1227 rq.flags = REQ_PM_SUSPEND;
1228 rq.special = &args;
1229 rq.pm = &rqpm;
1230 rqpm.pm_step = ide_pm_state_start_suspend;
ca078bae 1231 rqpm.pm_state = state.event;
1da177e4
LT		 1232
1233 return ide_do_drive_cmd(drive, &rq, ide_wait);
1234}
1235
1236static 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.flags = REQ_PM_RESUME;
1247 rq.special = &args;
1248 rq.pm = &rqpm;
1249 rqpm.pm_step = ide_pm_state_start_resume;
ca078bae 1250 rqpm.pm_state = PM_EVENT_ON;
1da177e4
LT		 1251
1252 return ide_do_drive_cmd(drive, &rq, ide_head_wait);
1253}
1254
1255int 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) {
1da177e4
LT		 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 ide_abort(drive, "drive reset");
1369
125e1874 1370 BUG_ON(HWGROUP(drive)->handler);
1da177e4
LT		 1371
1372 /* Ensure nothing gets queued after we
1373 drop the lock. Reset will clear the busy */
1374
1375 HWGROUP(drive)->busy = 1;
1376 spin_unlock_irqrestore(&ide_lock, flags);
1377 (void) ide_do_reset(drive);
1378
1379 return 0;
1380 }
1381
1382 case CDROMEJECT:
1383 case CDROMCLOSETRAY:
1384 return scsi_cmd_ioctl(file, bdev->bd_disk, cmd, p);
1385
1386 case HDIO_GET_BUSSTATE:
1387 if (!capable(CAP_SYS_ADMIN))
1388 return -EACCES;
1389 if (put_user(HWIF(drive)->bus_state, (long __user *)arg))
1390 return -EFAULT;
1391 return 0;
1392
1393 case HDIO_SET_BUSSTATE:
1394 if (!capable(CAP_SYS_ADMIN))
1395 return -EACCES;
1396 if (HWIF(drive)->busproc)
1397 return HWIF(drive)->busproc(drive, (int)arg);
1398 return -EOPNOTSUPP;
1399 default:
1400 return -EINVAL;
1401 }
1402}
1403
1404EXPORT_SYMBOL(generic_ide_ioctl);
1405
1406/*
1407 * stridx() returns the offset of c within s,
1408 * or -1 if c is '\0' or not found within s.
1409 */
1410static int __init stridx (const char *s, char c)
1411{
1412 char *i = strchr(s, c);
1413 return (i && c) ? i - s : -1;
1414}
1415
1416/*
1417 * match_parm() does parsing for ide_setup():
1418 *
1419 * 1. the first char of s must be '='.
1420 * 2. if the remainder matches one of the supplied keywords,
1421 * the index (1 based) of the keyword is negated and returned.
1422 * 3. if the remainder is a series of no more than max_vals numbers
1423 * separated by commas, the numbers are saved in vals[] and a
1424 * count of how many were saved is returned. Base10 is assumed,
1425 * and base16 is allowed when prefixed with "0x".
1426 * 4. otherwise, zero is returned.
1427 */
1428static int __init match_parm (char *s, const char *keywords[], int vals[], int max_vals)
1429{
1430 static const char *decimal = "0123456789";
1431 static const char *hex = "0123456789abcdef";
1432 int i, n;
1433
1434 if (*s++ == '=') {
1435 /*
1436 * Try matching against the supplied keywords,
1437 * and return -(index+1) if we match one
1438 */
1439 if (keywords != NULL) {
1440 for (i = 0; *keywords != NULL; ++i) {
1441 if (!strcmp(s, *keywords++))
1442 return -(i+1);
1443 }
1444 }
1445 /*
1446 * Look for a series of no more than "max_vals"
1447 * numeric values separated by commas, in base10,
1448 * or base16 when prefixed with "0x".
1449 * Return a count of how many were found.
1450 */
1451 for (n = 0; (i = stridx(decimal, *s)) >= 0;) {
1452 vals[n] = i;
1453 while ((i = stridx(decimal, *++s)) >= 0)
1454 vals[n] = (vals[n] * 10) + i;
1455 if (*s == 'x' && !vals[n]) {
1456 while ((i = stridx(hex, *++s)) >= 0)
1457 vals[n] = (vals[n] * 0x10) + i;
1458 }
1459 if (++n == max_vals)
1460 break;
1461 if (*s == ',' || *s == ';')
1462 ++s;
1463 }
1464 if (!*s)
1465 return n;
1466 }
1467 return 0; /* zero = nothing matched */
1468}
1469
1470#ifdef CONFIG_BLK_DEV_ALI14XX
1471static int __initdata probe_ali14xx;
1472extern int ali14xx_init(void);
1473#endif
1474#ifdef CONFIG_BLK_DEV_UMC8672
1475static int __initdata probe_umc8672;
1476extern int umc8672_init(void);
1477#endif
1478#ifdef CONFIG_BLK_DEV_DTC2278
1479static int __initdata probe_dtc2278;
1480extern int dtc2278_init(void);
1481#endif
1482#ifdef CONFIG_BLK_DEV_HT6560B
1483static int __initdata probe_ht6560b;
1484extern int ht6560b_init(void);
1485#endif
1486#ifdef CONFIG_BLK_DEV_QD65XX
1487static int __initdata probe_qd65xx;
1488extern int qd65xx_init(void);
1489#endif
1490
1491static int __initdata is_chipset_set[MAX_HWIFS];
1492
1493/*
1494 * ide_setup() gets called VERY EARLY during initialization,
1495 * to handle kernel "command line" strings beginning with "hdx=" or "ide".
1496 *
1497 * Remember to update Documentation/ide.txt if you change something here.
1498 */
1499static int __init ide_setup(char *s)
1500{
1501 int i, vals[3];
1502 ide_hwif_t *hwif;
1503 ide_drive_t *drive;
1504 unsigned int hw, unit;
1505 const char max_drive = 'a' + ((MAX_HWIFS * MAX_DRIVES) - 1);
1506 const char max_hwif = '0' + (MAX_HWIFS - 1);
1507
1508
1509 if (strncmp(s,"hd",2) == 0 && s[2] == '=') /* hd= is for hd.c */
1510 return 0; /* driver and not us */
1511
1512 if (strncmp(s,"ide",3) && strncmp(s,"idebus",6) && strncmp(s,"hd",2))
1513 return 0;
1514
1515 printk(KERN_INFO "ide_setup: %s", s);
1516 init_ide_data ();
1517
1518#ifdef CONFIG_BLK_DEV_IDEDOUBLER
1519 if (!strcmp(s, "ide=doubler")) {
1520 extern int ide_doubler;
1521
1522 printk(" : Enabled support for IDE doublers\n");
1523 ide_doubler = 1;
1524 return 1;
1525 }
1526#endif /* CONFIG_BLK_DEV_IDEDOUBLER */
1527
1528 if (!strcmp(s, "ide=nodma")) {
1529 printk(" : Prevented DMA\n");
1530 noautodma = 1;
1531 return 1;
1532 }
1533
1534#ifdef CONFIG_BLK_DEV_IDEPCI
1535 if (!strcmp(s, "ide=reverse")) {
1536 ide_scan_direction = 1;
1537 printk(" : Enabled support for IDE inverse scan order.\n");
1538 return 1;
1539 }
1540#endif /* CONFIG_BLK_DEV_IDEPCI */
1541
1542 /*
1543 * Look for drive options: "hdx="
1544 */
1545 if (s[0] == 'h' && s[1] == 'd' && s[2] >= 'a' && s[2] <= max_drive) {
1546 const char *hd_words[] = {
1547 "none", "noprobe", "nowerr", "cdrom", "serialize",
1548 "autotune", "noautotune", "minus8", "swapdata", "bswap",
1549 "minus11", "remap", "remap63", "scsi", NULL };
1550 unit = s[2] - 'a';
1551 hw = unit / MAX_DRIVES;
1552 unit = unit % MAX_DRIVES;
1553 hwif = &ide_hwifs[hw];
1554 drive = &hwif->drives[unit];
1555 if (strncmp(s + 4, "ide-", 4) == 0) {
1556 strlcpy(drive->driver_req, s + 4, sizeof(drive->driver_req));
1557 goto done;
1558 }
1559 switch (match_parm(&s[3], hd_words, vals, 3)) {
1560 case -1: /* "none" */
1561 case -2: /* "noprobe" */
1562 drive->noprobe = 1;
1563 goto done;
1564 case -3: /* "nowerr" */
1565 drive->bad_wstat = BAD_R_STAT;
1566 hwif->noprobe = 0;
1567 goto done;
1568 case -4: /* "cdrom" */
1569 drive->present = 1;
1570 drive->media = ide_cdrom;
1571 /* an ATAPI device ignores DRDY */
1572 drive->ready_stat = 0;
1573 hwif->noprobe = 0;
1574 goto done;
1575 case -5: /* "serialize" */
1576 printk(" -- USE \"ide%d=serialize\" INSTEAD", hw);
1577 goto do_serialize;
1578 case -6: /* "autotune" */
1579 drive->autotune = IDE_TUNE_AUTO;
1580 goto obsolete_option;
1581 case -7: /* "noautotune" */
1582 drive->autotune = IDE_TUNE_NOAUTO;
1583 goto obsolete_option;
1584 case -9: /* "swapdata" */
1585 case -10: /* "bswap" */
1586 drive->bswap = 1;
1587 goto done;
1588 case -12: /* "remap" */
1589 drive->remap_0_to_1 = 1;
1590 goto done;
1591 case -13: /* "remap63" */
1592 drive->sect0 = 63;
1593 goto done;
1594 case -14: /* "scsi" */
1595 drive->scsi = 1;
1596 goto done;
1597 case 3: /* cyl,head,sect */
1598 drive->media = ide_disk;
1599 drive->ready_stat = READY_STAT;
1600 drive->cyl = drive->bios_cyl = vals[0];
1601 drive->head = drive->bios_head = vals[1];
1602 drive->sect = drive->bios_sect = vals[2];
1603 drive->present = 1;
1604 drive->forced_geom = 1;
1605 hwif->noprobe = 0;
1606 goto done;
1607 default:
1608 goto bad_option;
1609 }
1610 }
1611
1612 if (s[0] != 'i' || s[1] != 'd' || s[2] != 'e')
1613 goto bad_option;
1614 /*
1615 * Look for bus speed option: "idebus="
1616 */
1617 if (s[3] == 'b' && s[4] == 'u' && s[5] == 's') {
1618 if (match_parm(&s[6], NULL, vals, 1) != 1)
1619 goto bad_option;
1620 if (vals[0] >= 20 && vals[0] <= 66) {
1621 idebus_parameter = vals[0];
1622 } else
1623 printk(" -- BAD BUS SPEED! Expected value from 20 to 66");
1624 goto done;
1625 }
1626 /*
1627 * Look for interface options: "idex="
1628 */
1629 if (s[3] >= '0' && s[3] <= max_hwif) {
1630 /*
1631 * Be VERY CAREFUL changing this: note hardcoded indexes below
1632 * (-8, -9, -10) are reserved to ease the hardcoding.
1633 */
1634 static const char *ide_words[] = {
1635 "noprobe", "serialize", "autotune", "noautotune",
1636 "reset", "dma", "ata66", "minus8", "minus9",
1637 "minus10", "four", "qd65xx", "ht6560b", "cmd640_vlb",
1638 "dtc2278", "umc8672", "ali14xx", NULL };
1639 hw = s[3] - '0';
1640 hwif = &ide_hwifs[hw];
1641 i = match_parm(&s[4], ide_words, vals, 3);
1642
1643 /*
1644 * Cryptic check to ensure chipset not already set for hwif.
1645 * Note: we can't depend on hwif->chipset here.
1646 */
1647 if ((i >= -18 && i <= -11) || (i > 0 && i <= 3)) {
1648 /* chipset already specified */
1649 if (is_chipset_set[hw])
1650 goto bad_option;
1651 if (i > -18 && i <= -11) {
1652 /* these drivers are for "ide0=" only */
1653 if (hw != 0)
1654 goto bad_hwif;
1655 /* chipset already specified for 2nd port */
1656 if (is_chipset_set[hw+1])
1657 goto bad_option;
1658 }
1659 is_chipset_set[hw] = 1;
1660 printk("\n");
1661 }
1662
1663 switch (i) {
1664#ifdef CONFIG_BLK_DEV_ALI14XX
1665 case -17: /* "ali14xx" */
1666 probe_ali14xx = 1;
1667 goto done;
1668#endif
1669#ifdef CONFIG_BLK_DEV_UMC8672
1670 case -16: /* "umc8672" */
1671 probe_umc8672 = 1;
1672 goto done;
1673#endif
1674#ifdef CONFIG_BLK_DEV_DTC2278
1675 case -15: /* "dtc2278" */
1676 probe_dtc2278 = 1;
1677 goto done;
1678#endif
1679#ifdef CONFIG_BLK_DEV_CMD640
1680 case -14: /* "cmd640_vlb" */
1681 {
1682 extern int cmd640_vlb; /* flag for cmd640.c */
1683 cmd640_vlb = 1;
1684 goto done;
1685 }
1686#endif
1687#ifdef CONFIG_BLK_DEV_HT6560B
1688 case -13: /* "ht6560b" */
1689 probe_ht6560b = 1;
1690 goto done;
1691#endif
1692#ifdef CONFIG_BLK_DEV_QD65XX
1693 case -12: /* "qd65xx" */
1694 probe_qd65xx = 1;
1695 goto done;
1696#endif
1697#ifdef CONFIG_BLK_DEV_4DRIVES
1698 case -11: /* "four" drives on one set of ports */
1699 {
1700 ide_hwif_t *mate = &ide_hwifs[hw^1];
1701 mate->drives[0].select.all ^= 0x20;
1702 mate->drives[1].select.all ^= 0x20;
1703 hwif->chipset = mate->chipset = ide_4drives;
1704 mate->irq = hwif->irq;
1705 memcpy(mate->io_ports, hwif->io_ports, sizeof(hwif->io_ports));
1706 goto do_serialize;
1707 }
1708#endif /* CONFIG_BLK_DEV_4DRIVES */
1709 case -10: /* minus10 */
1710 case -9: /* minus9 */
1711 case -8: /* minus8 */
1712 goto bad_option;
1713 case -7: /* ata66 */
1714#ifdef CONFIG_BLK_DEV_IDEPCI
1715 hwif->udma_four = 1;
1716 goto obsolete_option;
1717#else
1718 goto bad_hwif;
1719#endif
1720 case -6: /* dma */
1721 hwif->autodma = 1;
1722 goto obsolete_option;
1723 case -5: /* "reset" */
1724 hwif->reset = 1;
1725 goto obsolete_option;
1726 case -4: /* "noautotune" */
1727 hwif->drives[0].autotune = IDE_TUNE_NOAUTO;
1728 hwif->drives[1].autotune = IDE_TUNE_NOAUTO;
1729 goto obsolete_option;
1730 case -3: /* "autotune" */
1731 hwif->drives[0].autotune = IDE_TUNE_AUTO;
1732 hwif->drives[1].autotune = IDE_TUNE_AUTO;
1733 goto obsolete_option;
1734 case -2: /* "serialize" */
1735 do_serialize:
1736 hwif->mate = &ide_hwifs[hw^1];
1737 hwif->mate->mate = hwif;
1738 hwif->serialized = hwif->mate->serialized = 1;
1739 goto obsolete_option;
1740
1741 case -1: /* "noprobe" */
1742 hwif->noprobe = 1;
1743 goto done;
1744
1745 case 1: /* base */
1746 vals[1] = vals[0] + 0x206; /* default ctl */
1747 case 2: /* base,ctl */
1748 vals[2] = 0; /* default irq = probe for it */
1749 case 3: /* base,ctl,irq */
1750 hwif->hw.irq = vals[2];
1751 ide_init_hwif_ports(&hwif->hw, (unsigned long) vals[0], (unsigned long) vals[1], &hwif->irq);
1752 memcpy(hwif->io_ports, hwif->hw.io_ports, sizeof(hwif->io_ports));
1753 hwif->irq = vals[2];
1754 hwif->noprobe = 0;
1755 hwif->chipset = ide_forced;
1756 goto obsolete_option;
1757
1758 case 0: goto bad_option;
1759 default:
1760 printk(" -- SUPPORT NOT CONFIGURED IN THIS KERNEL\n");
1761 return 1;
1762 }
1763 }
1764bad_option:
1765 printk(" -- BAD OPTION\n");
1766 return 1;
1767obsolete_option:
1768 printk(" -- OBSOLETE OPTION, WILL BE REMOVED SOON!\n");
1769 return 1;
1770bad_hwif:
1771 printk("-- NOT SUPPORTED ON ide%d", hw);
1772done:
1773 printk("\n");
1774 return 1;
1775}
1776
1777extern void pnpide_init(void);
1778extern void h8300_ide_init(void);
1779
1780/*
1781 * probe_for_hwifs() finds/initializes "known" IDE interfaces
1782 */
1783static void __init probe_for_hwifs (void)
1784{
1785#ifdef CONFIG_BLK_DEV_IDEPCI
1786 ide_scan_pcibus(ide_scan_direction);
1787#endif /* CONFIG_BLK_DEV_IDEPCI */
1788
1789#ifdef CONFIG_ETRAX_IDE
1790 {
1791 extern void init_e100_ide(void);
1792 init_e100_ide();
1793 }
1794#endif /* CONFIG_ETRAX_IDE */
1795#ifdef CONFIG_BLK_DEV_CMD640
1796 {
1797 extern void ide_probe_for_cmd640x(void);
1798 ide_probe_for_cmd640x();
1799 }
1800#endif /* CONFIG_BLK_DEV_CMD640 */
1801#ifdef CONFIG_BLK_DEV_IDE_PMAC
1802 {
1803 extern void pmac_ide_probe(void);
1804 pmac_ide_probe();
1805 }
1806#endif /* CONFIG_BLK_DEV_IDE_PMAC */
1807#ifdef CONFIG_BLK_DEV_GAYLE
1808 {
1809 extern void gayle_init(void);
1810 gayle_init();
1811 }
1812#endif /* CONFIG_BLK_DEV_GAYLE */
1813#ifdef CONFIG_BLK_DEV_FALCON_IDE
1814 {
1815 extern void falconide_init(void);
1816 falconide_init();
1817 }
1818#endif /* CONFIG_BLK_DEV_FALCON_IDE */
1819#ifdef CONFIG_BLK_DEV_MAC_IDE
1820 {
1821 extern void macide_init(void);
1822 macide_init();
1823 }
1824#endif /* CONFIG_BLK_DEV_MAC_IDE */
1825#ifdef CONFIG_BLK_DEV_Q40IDE
1826 {
1827 extern void q40ide_init(void);
1828 q40ide_init();
1829 }
1830#endif /* CONFIG_BLK_DEV_Q40IDE */
1831#ifdef CONFIG_BLK_DEV_BUDDHA
1832 {
1833 extern void buddha_init(void);
1834 buddha_init();
1835 }
1836#endif /* CONFIG_BLK_DEV_BUDDHA */
1837#ifdef CONFIG_BLK_DEV_IDEPNP
1838 pnpide_init();
1839#endif
1840#ifdef CONFIG_H8300
1841 h8300_ide_init();
1842#endif
1843}
1844
8604affd 1845void ide_register_subdriver(ide_drive_t *drive, ide_driver_t *driver)
1da177e4 1846{
1da177e4 1847#ifdef CONFIG_PROC_FS
8604affd 1848 ide_add_proc_entries(drive->proc, driver->proc, drive);
1da177e4 1849#endif
1da177e4
LT		 1850}
1851
1852EXPORT_SYMBOL(ide_register_subdriver);
1853
1854/**
1855 * ide_unregister_subdriver - disconnect drive from driver
1856 * @drive: drive to unplug
8604affd 1857 * @driver: driver
1da177e4
LT		 1858 *
1859 * Disconnect a drive from the driver it was attached to and then
1860 * clean up the various proc files and other objects attached to it.
1861 *
8604affd 1862 * Takes ide_setting_sem and ide_lock.
1da177e4 1863 * Caller must hold none of the locks.
1da177e4
LT		 1864 */
1865
8604affd 1866void ide_unregister_subdriver(ide_drive_t *drive, ide_driver_t *driver)
1da177e4
LT		 1867{
1868 unsigned long flags;
1869
1870 down(&ide_setting_sem);
1871 spin_lock_irqsave(&ide_lock, flags);
1da177e4 1872#ifdef CONFIG_PROC_FS
8604affd 1873 ide_remove_proc_entries(drive->proc, driver->proc);
1da177e4
LT		 1874#endif
1875 auto_remove_settings(drive);
1da177e4
LT		 1876 spin_unlock_irqrestore(&ide_lock, flags);
1877 up(&ide_setting_sem);
1da177e4
LT		 1878}
1879
1880EXPORT_SYMBOL(ide_unregister_subdriver);
1881
1da177e4
LT		 1882/*
1883 * Probe module
1884 */
1885
1886EXPORT_SYMBOL(ide_lock);
1887
8604affd
BZ		 1888static int ide_bus_match(struct device *dev, struct device_driver *drv)
1889{
1890 return 1;
1891}
1892
263756ec
KS		 1893static char *media_string(ide_drive_t *drive)
1894{
1895 switch (drive->media) {
1896 case ide_disk:
1897 return "disk";
1898 case ide_cdrom:
1899 return "cdrom";
1900 case ide_tape:
1901 return "tape";
1902 case ide_floppy:
1903 return "floppy";
1904 default:
1905 return "UNKNOWN";
1906 }
1907}
1908
1909static ssize_t media_show(struct device *dev, struct device_attribute *attr, char *buf)
1910{
1911 ide_drive_t *drive = to_ide_device(dev);
1912 return sprintf(buf, "%s\n", media_string(drive));
1913}
1914
1915static ssize_t drivename_show(struct device *dev, struct device_attribute *attr, char *buf)
1916{
1917 ide_drive_t *drive = to_ide_device(dev);
1918 return sprintf(buf, "%s\n", drive->name);
1919}
1920
1921static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf)
1922{
1923 ide_drive_t *drive = to_ide_device(dev);
1924 return sprintf(buf, "ide:m-%s\n", media_string(drive));
1925}
1926
1927static struct device_attribute ide_dev_attrs[] = {
1928 __ATTR_RO(media),
1929 __ATTR_RO(drivename),
1930 __ATTR_RO(modalias),
1931 __ATTR_NULL
1932};
1933
1934static int ide_uevent(struct device *dev, char **envp, int num_envp,
1935 char *buffer, int buffer_size)
1936{
1937 ide_drive_t *drive = to_ide_device(dev);
1938 int i = 0;
1939 int length = 0;
1940
1941 add_uevent_var(envp, num_envp, &i, buffer, buffer_size, &length,
1942 "MEDIA=%s", media_string(drive));
1943 add_uevent_var(envp, num_envp, &i, buffer, buffer_size, &length,
1944 "DRIVENAME=%s", drive->name);
1945 add_uevent_var(envp, num_envp, &i, buffer, buffer_size, &length,
1946 "MODALIAS=ide:m-%s", media_string(drive));
1947 envp[i] = NULL;
1948 return 0;
1949}
1950
4031bbe4
RK		 1951static int generic_ide_probe(struct device *dev)
1952{
1953 ide_drive_t *drive = to_ide_device(dev);
1954 ide_driver_t *drv = to_ide_driver(dev->driver);
1955
1956 return drv->probe ? drv->probe(drive) : -ENODEV;
1957}
1958
1959static int generic_ide_remove(struct device *dev)
1960{
1961 ide_drive_t *drive = to_ide_device(dev);
1962 ide_driver_t *drv = to_ide_driver(dev->driver);
1963
1964 if (drv->remove)
1965 drv->remove(drive);
1966
1967 return 0;
1968}
1969
1970static void generic_ide_shutdown(struct device *dev)
1971{
1972 ide_drive_t *drive = to_ide_device(dev);
1973 ide_driver_t *drv = to_ide_driver(dev->driver);
1974
1975 if (dev->driver && drv->shutdown)
1976 drv->shutdown(drive);
1977}
1978
1da177e4
LT		 1979struct bus_type ide_bus_type = {
1980 .name = "ide",
8604affd 1981 .match = ide_bus_match,
263756ec 1982 .uevent = ide_uevent,
4031bbe4
RK		 1983 .probe = generic_ide_probe,
1984 .remove = generic_ide_remove,
1985 .shutdown = generic_ide_shutdown,
263756ec 1986 .dev_attrs = ide_dev_attrs,
1da177e4
LT		 1987 .suspend = generic_ide_suspend,
1988 .resume = generic_ide_resume,
1989};
1990
8604affd
BZ		 1991EXPORT_SYMBOL_GPL(ide_bus_type);
1992
1da177e4
LT		 1993/*
1994 * This is gets invoked once during initialization, to set *everything* up
1995 */
1996static int __init ide_init(void)
1997{
1998 printk(KERN_INFO "Uniform Multi-Platform E-IDE driver " REVISION "\n");
1999 devfs_mk_dir("ide");
2000 system_bus_speed = ide_system_bus_speed();
2001
2002 bus_register(&ide_bus_type);
2003
2004 init_ide_data();
2005
2006#ifdef CONFIG_PROC_FS
2007 proc_ide_root = proc_mkdir("ide", NULL);
2008#endif
2009
2010#ifdef CONFIG_BLK_DEV_ALI14XX
2011 if (probe_ali14xx)
2012 (void)ali14xx_init();
2013#endif
2014#ifdef CONFIG_BLK_DEV_UMC8672
2015 if (probe_umc8672)
2016 (void)umc8672_init();
2017#endif
2018#ifdef CONFIG_BLK_DEV_DTC2278
2019 if (probe_dtc2278)
2020 (void)dtc2278_init();
2021#endif
2022#ifdef CONFIG_BLK_DEV_HT6560B
2023 if (probe_ht6560b)
2024 (void)ht6560b_init();
2025#endif
2026#ifdef CONFIG_BLK_DEV_QD65XX
2027 if (probe_qd65xx)
2028 (void)qd65xx_init();
2029#endif
2030
2031 initializing = 1;
2032 /* Probe for special PCI and other "known" interface chipsets. */
2033 probe_for_hwifs();
2034 initializing = 0;
2035
2036#ifdef CONFIG_PROC_FS
2037 proc_ide_create();
2038#endif
2039 return 0;
2040}
2041
2042#ifdef MODULE
2043static char *options = NULL;
2044module_param(options, charp, 0);
2045MODULE_LICENSE("GPL");
2046
2047static void __init parse_options (char *line)
2048{
2049 char *next = line;
2050
2051 if (line == NULL || !*line)
2052 return;
2053 while ((line = next) != NULL) {
2054 if ((next = strchr(line,' ')) != NULL)
2055 *next++ = 0;
2056 if (!ide_setup(line))
2057 printk (KERN_INFO "Unknown option '%s'\n", line);
2058 }
2059}
2060
fbd8ad30 2061int __init init_module (void)
1da177e4
LT		 2062{
2063 parse_options(options);
2064 return ide_init();
2065}
2066
2067void cleanup_module (void)
2068{
2069 int index;
2070
2071 for (index = 0; index < MAX_HWIFS; ++index)
2072 ide_unregister(index);
2073
2074#ifdef CONFIG_PROC_FS
2075 proc_ide_destroy();
2076#endif
2077 devfs_remove("ide");
2078
2079 bus_unregister(&ide_bus_type);
2080}
2081
2082#else /* !MODULE */
2083
2084__setup("", ide_setup);
2085
2086module_init(ide_init);
2087
2088#endif /* MODULE */
Linux 6.x block layer and io_uring tree(s)