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ide/pci/delkin_cb.c: pci_module_init to pci_register_driver
[deliverable/linux.git] / drivers / ide / ide.c
CommitLineData
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
1da177e4
LT		 129#define _IDE_C /* Tell ide.h it's really us */
130
1da177e4
LT		 131#include <linux/module.h>
132#include <linux/types.h>
133#include <linux/string.h>
134#include <linux/kernel.h>
135#include <linux/timer.h>
136#include <linux/mm.h>
137#include <linux/interrupt.h>
138#include <linux/major.h>
139#include <linux/errno.h>
140#include <linux/genhd.h>
141#include <linux/blkpg.h>
142#include <linux/slab.h>
143#include <linux/init.h>
144#include <linux/pci.h>
145#include <linux/delay.h>
146#include <linux/ide.h>
1da177e4
LT		 147#include <linux/completion.h>
148#include <linux/reboot.h>
149#include <linux/cdrom.h>
150#include <linux/seq_file.h>
151#include <linux/device.h>
152#include <linux/bitops.h>
153
154#include <asm/byteorder.h>
155#include <asm/irq.h>
156#include <asm/uaccess.h>
157#include <asm/io.h>
158
159
160/* default maximum number of failures */
161#define IDE_DEFAULT_MAX_FAILURES 1
162
163static const u8 ide_hwif_to_major[] = { IDE0_MAJOR, IDE1_MAJOR,
164 IDE2_MAJOR, IDE3_MAJOR,
165 IDE4_MAJOR, IDE5_MAJOR,
166 IDE6_MAJOR, IDE7_MAJOR,
167 IDE8_MAJOR, IDE9_MAJOR };
168
169static int idebus_parameter; /* holds the "idebus=" parameter */
170static int system_bus_speed; /* holds what we think is VESA/PCI bus speed */
171static int initializing; /* set while initializing built-in drivers */
172
173DECLARE_MUTEX(ide_cfg_sem);
174 __cacheline_aligned_in_smp DEFINE_SPINLOCK(ide_lock);
175
176#ifdef CONFIG_BLK_DEV_IDEPCI
177static int ide_scan_direction; /* THIS was formerly 2.2.x pci=reverse */
178#endif
179
180#ifdef CONFIG_IDEDMA_AUTO
181int noautodma = 0;
182#else
183int noautodma = 1;
184#endif
185
186EXPORT_SYMBOL(noautodma);
187
e3a59b4d
HR		 188#ifdef CONFIG_BLK_DEV_IDEACPI
189int ide_noacpi = 0;
190int ide_noacpitfs = 1;
191int ide_noacpionboot = 1;
192#endif
193
1da177e4
LT		 194/*
195 * This is declared extern in ide.h, for access by other IDE modules:
196 */
197ide_hwif_t ide_hwifs[MAX_HWIFS]; /* master data repository */
198
199EXPORT_SYMBOL(ide_hwifs);
200
1da177e4
LT		 201/*
202 * Do not even *think* about calling this!
203 */
204static void init_hwif_data(ide_hwif_t *hwif, unsigned int index)
205{
206 unsigned int unit;
207
208 /* bulk initialize hwif & drive info with zeros */
209 memset(hwif, 0, sizeof(ide_hwif_t));
210
211 /* fill in any non-zero initial values */
212 hwif->index = index;
213 hwif->major = ide_hwif_to_major[index];
214
215 hwif->name[0] = 'i';
216 hwif->name[1] = 'd';
217 hwif->name[2] = 'e';
218 hwif->name[3] = '0' + index;
219
220 hwif->bus_state = BUSSTATE_ON;
221
222 hwif->atapi_dma = 0; /* disable all atapi dma */
223 hwif->ultra_mask = 0x80; /* disable all ultra */
224 hwif->mwdma_mask = 0x80; /* disable all mwdma */
225 hwif->swdma_mask = 0x80; /* disable all swdma */
226
f36d4024 227 init_completion(&hwif->gendev_rel_comp);
1da177e4
LT		 228
229 default_hwif_iops(hwif);
230 default_hwif_transport(hwif);
231 for (unit = 0; unit < MAX_DRIVES; ++unit) {
232 ide_drive_t *drive = &hwif->drives[unit];
233
234 drive->media = ide_disk;
235 drive->select.all = (unit<<4)|0xa0;
236 drive->hwif = hwif;
237 drive->ctl = 0x08;
238 drive->ready_stat = READY_STAT;
239 drive->bad_wstat = BAD_W_STAT;
240 drive->special.b.recalibrate = 1;
241 drive->special.b.set_geometry = 1;
242 drive->name[0] = 'h';
243 drive->name[1] = 'd';
244 drive->name[2] = 'a' + (index * MAX_DRIVES) + unit;
245 drive->max_failures = IDE_DEFAULT_MAX_FAILURES;
246 drive->using_dma = 0;
1da177e4
LT		 247 drive->vdma = 0;
248 INIT_LIST_HEAD(&drive->list);
f36d4024 249 init_completion(&drive->gendev_rel_comp);
1da177e4
LT		 250 }
251}
252
253static void init_hwif_default(ide_hwif_t *hwif, unsigned int index)
254{
255 hw_regs_t hw;
256
257 memset(&hw, 0, sizeof(hw_regs_t));
258
259 ide_init_hwif_ports(&hw, ide_default_io_base(index), 0, &hwif->irq);
260
261 memcpy(&hwif->hw, &hw, sizeof(hw));
262 memcpy(hwif->io_ports, hw.io_ports, sizeof(hw.io_ports));
263
264 hwif->noprobe = !hwif->io_ports[IDE_DATA_OFFSET];
265#ifdef CONFIG_BLK_DEV_HD
266 if (hwif->io_ports[IDE_DATA_OFFSET] == HD_DATA)
267 hwif->noprobe = 1; /* may be overridden by ide_setup() */
268#endif
269}
270
271extern void ide_arm_init(void);
272
273/*
274 * init_ide_data() sets reasonable default values into all fields
275 * of all instances of the hwifs and drives, but only on the first call.
276 * Subsequent calls have no effect (they don't wipe out anything).
277 *
278 * This routine is normally called at driver initialization time,
279 * but may also be called MUCH earlier during kernel "command-line"
280 * parameter processing. As such, we cannot depend on any other parts
281 * of the kernel (such as memory allocation) to be functioning yet.
282 *
283 * This is too bad, as otherwise we could dynamically allocate the
284 * ide_drive_t structs as needed, rather than always consuming memory
285 * for the max possible number (MAX_HWIFS * MAX_DRIVES) of them.
286 *
287 * FIXME: We should stuff the setup data into __init and copy the
288 * relevant hwifs/allocate them properly during boot.
289 */
290#define MAGIC_COOKIE 0x12345678
291static void __init init_ide_data (void)
292{
293 ide_hwif_t *hwif;
294 unsigned int index;
295 static unsigned long magic_cookie = MAGIC_COOKIE;
296
297 if (magic_cookie != MAGIC_COOKIE)
298 return; /* already initialized */
299 magic_cookie = 0;
300
301 /* Initialise all interface structures */
302 for (index = 0; index < MAX_HWIFS; ++index) {
303 hwif = &ide_hwifs[index];
304 init_hwif_data(hwif, index);
305 init_hwif_default(hwif, index);
306#if !defined(CONFIG_PPC32) || !defined(CONFIG_PCI)
307 hwif->irq = hwif->hw.irq =
308 ide_init_default_irq(hwif->io_ports[IDE_DATA_OFFSET]);
309#endif
310 }
311#ifdef CONFIG_IDE_ARM
312 initializing = 1;
313 ide_arm_init();
314 initializing = 0;
315#endif
316}
317
318/**
319 * ide_system_bus_speed - guess bus speed
320 *
321 * ide_system_bus_speed() returns what we think is the system VESA/PCI
322 * bus speed (in MHz). This is used for calculating interface PIO timings.
323 * The default is 40 for known PCI systems, 50 otherwise.
324 * The "idebus=xx" parameter can be used to override this value.
325 * The actual value to be used is computed/displayed the first time
326 * through. Drivers should only use this as a last resort.
327 *
328 * Returns a guessed speed in MHz.
329 */
330
331static int ide_system_bus_speed(void)
332{
333#ifdef CONFIG_PCI
334 static struct pci_device_id pci_default[] = {
335 { PCI_DEVICE(PCI_ANY_ID, PCI_ANY_ID) },
336 { }
337 };
338#else
339#define pci_default 0
340#endif /* CONFIG_PCI */
341
342 if (!system_bus_speed) {
343 if (idebus_parameter) {
344 /* user supplied value */
345 system_bus_speed = idebus_parameter;
346 } else if (pci_dev_present(pci_default)) {
347 /* safe default value for PCI */
348 system_bus_speed = 33;
349 } else {
350 /* safe default value for VESA and PCI */
351 system_bus_speed = 50;
352 }
353 printk(KERN_INFO "ide: Assuming %dMHz system bus speed "
354 "for PIO modes%s\n", system_bus_speed,
355 idebus_parameter ? "" : "; override with idebus=xx");
356 }
357 return system_bus_speed;
358}
359
1da177e4
LT		 360#ifdef CONFIG_PROC_FS
361struct proc_dir_entry *proc_ide_root;
362#endif
363
364static struct resource* hwif_request_region(ide_hwif_t *hwif,
365 unsigned long addr, int num)
366{
367 struct resource *res = request_region(addr, num, hwif->name);
368
369 if (!res)
370 printk(KERN_ERR "%s: I/O resource 0x%lX-0x%lX not free.\n",
371 hwif->name, addr, addr+num-1);
372 return res;
373}
374
375/**
376 * ide_hwif_request_regions - request resources for IDE
377 * @hwif: interface to use
378 *
379 * Requests all the needed resources for an interface.
380 * Right now core IDE code does this work which is deeply wrong.
381 * MMIO leaves it to the controller driver,
382 * PIO will migrate this way over time.
383 */
384
385int ide_hwif_request_regions(ide_hwif_t *hwif)
386{
387 unsigned long addr;
388 unsigned int i;
389
2ad1e558 390 if (hwif->mmio)
1da177e4 391 return 0;
1da177e4
LT		 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
2ad1e558 438 if (hwif->mmio)
1da177e4
LT		 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 *
020e322d 456 * Restore hwif to a previous state by copying most settings
1da177e4
LT		 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;
7469aaf6 507 hwif->dma_off_quietly = tmp_hwif->dma_off_quietly;
1da177e4 508 hwif->ide_dma_test_irq = tmp_hwif->ide_dma_test_irq;
f0dd8712 509 hwif->ide_dma_clear_irq = tmp_hwif->ide_dma_clear_irq;
ccf35289 510 hwif->dma_host_on = tmp_hwif->dma_host_on;
7469aaf6 511 hwif->dma_host_off = tmp_hwif->dma_host_off;
1da177e4
LT		 512 hwif->ide_dma_lostirq = tmp_hwif->ide_dma_lostirq;
513 hwif->ide_dma_timeout = tmp_hwif->ide_dma_timeout;
514
515 hwif->OUTB = tmp_hwif->OUTB;
516 hwif->OUTBSYNC = tmp_hwif->OUTBSYNC;
517 hwif->OUTW = tmp_hwif->OUTW;
1da177e4
LT		 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;
1da177e4
LT		 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
1da177e4
LT		 544 hwif->config_data = tmp_hwif->config_data;
545 hwif->select_data = tmp_hwif->select_data;
020e322d
SS		 546 hwif->extra_base = tmp_hwif->extra_base;
547 hwif->extra_ports = tmp_hwif->extra_ports;
1da177e4
LT		 548 hwif->autodma = tmp_hwif->autodma;
549 hwif->udma_four = tmp_hwif->udma_four;
1da177e4
LT		 550
551 hwif->hwif_data = tmp_hwif->hwif_data;
552}
553
554/**
020e322d 555 * ide_unregister - free an IDE interface
1da177e4
LT		 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
020e322d
SS		 568 * the interface will not be reopened (present/vanishing locking
569 * isn't yet done BTW). After we commit to the final kill we
1da177e4
LT		 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];
94f6c59d 595 if (!drive->present)
1da177e4 596 continue;
8604affd
BZ		 597 spin_unlock_irq(&ide_lock);
598 device_unregister(&drive->gendev);
f36d4024 599 wait_for_completion(&drive->gendev_rel_comp);
8604affd 600 spin_lock_irq(&ide_lock);
1da177e4
LT		 601 }
602 hwif->present = 0;
603
604 spin_unlock_irq(&ide_lock);
605
1da177e4
LT		 606 destroy_proc_ide_interface(hwif);
607
608 hwgroup = hwif->hwgroup;
609 /*
610 * free the irq if we were the only hwif using it
611 */
612 g = hwgroup->hwif;
613 do {
614 if (g->irq == hwif->irq)
615 ++irq_count;
616 g = g->next;
617 } while (g != hwgroup->hwif);
618 if (irq_count == 1)
619 free_irq(hwif->irq, hwgroup);
620
621 spin_lock_irq(&ide_lock);
622 /*
623 * Note that we only release the standard ports,
624 * and do not even try to handle any extra ports
625 * allocated for weird IDE interface chipsets.
626 */
627 ide_hwif_release_regions(hwif);
628
629 /*
630 * Remove us from the hwgroup, and free
631 * the hwgroup if we were the only member
632 */
1da177e4
LT		 633 if (hwif->next == hwif) {
634 BUG_ON(hwgroup->hwif != hwif);
635 kfree(hwgroup);
636 } else {
637 /* There is another interface in hwgroup.
638 * Unlink us, and set hwgroup->drive and ->hwif to
639 * something sane.
640 */
641 g = hwgroup->hwif;
642 while (g->next != hwif)
643 g = g->next;
644 g->next = hwif->next;
645 if (hwgroup->hwif == hwif) {
646 /* Chose a random hwif for hwgroup->hwif.
647 * It's guaranteed that there are no drives
648 * left in the hwgroup.
649 */
650 BUG_ON(hwgroup->drive != NULL);
651 hwgroup->hwif = g;
652 }
653 BUG_ON(hwgroup->hwif == hwif);
654 }
655
656 /* More messed up locking ... */
657 spin_unlock_irq(&ide_lock);
658 device_unregister(&hwif->gendev);
f36d4024 659 wait_for_completion(&hwif->gendev_rel_comp);
1da177e4
LT		 660
661 /*
662 * Remove us from the kernel's knowledge
663 */
664 blk_unregister_region(MKDEV(hwif->major, 0), MAX_DRIVES<<PARTN_BITS);
665 kfree(hwif->sg_table);
666 unregister_blkdev(hwif->major, hwif->name);
667 spin_lock_irq(&ide_lock);
668
669 if (hwif->dma_base) {
670 (void) ide_release_dma(hwif);
671
672 hwif->dma_base = 0;
673 hwif->dma_master = 0;
674 hwif->dma_command = 0;
675 hwif->dma_vendor1 = 0;
676 hwif->dma_status = 0;
677 hwif->dma_vendor3 = 0;
678 hwif->dma_prdtable = 0;
020e322d
SS		 679
680 hwif->extra_base = 0;
681 hwif->extra_ports = 0;
1da177e4
LT		 682 }
683
684 /* copy original settings */
685 tmp_hwif = *hwif;
686
687 /* restore hwif data to pristine status */
688 init_hwif_data(hwif, index);
689 init_hwif_default(hwif, index);
690
691 ide_hwif_restore(hwif, &tmp_hwif);
692
693abort:
694 spin_unlock_irq(&ide_lock);
695 up(&ide_cfg_sem);
696}
697
698EXPORT_SYMBOL(ide_unregister);
699
700
701/**
702 * ide_setup_ports - set up IDE interface ports
703 * @hw: register descriptions
704 * @base: base register
705 * @offsets: table of register offsets
706 * @ctrl: control register
707 * @ack_irq: IRQ ack
708 * @irq: interrupt lie
709 *
710 * Setup hw_regs_t structure described by parameters. You
711 * may set up the hw structure yourself OR use this routine to
712 * do it for you. This is basically a helper
713 *
714 */
715
716void ide_setup_ports ( hw_regs_t *hw,
717 unsigned long base, int *offsets,
718 unsigned long ctrl, unsigned long intr,
719 ide_ack_intr_t *ack_intr,
720/*
721 * ide_io_ops_t *iops,
722 */
723 int irq)
724{
725 int i;
726
2c3e0262 727 memset(hw, 0, sizeof(hw_regs_t));
1da177e4
LT		 728 for (i = 0; i < IDE_NR_PORTS; i++) {
729 if (offsets[i] == -1) {
730 switch(i) {
731 case IDE_CONTROL_OFFSET:
732 hw->io_ports[i] = ctrl;
733 break;
734#if defined(CONFIG_AMIGA) || defined(CONFIG_MAC)
735 case IDE_IRQ_OFFSET:
736 hw->io_ports[i] = intr;
737 break;
738#endif /* (CONFIG_AMIGA) || (CONFIG_MAC) */
739 default:
740 hw->io_ports[i] = 0;
741 break;
742 }
743 } else {
744 hw->io_ports[i] = base + offsets[i];
745 }
746 }
747 hw->irq = irq;
748 hw->dma = NO_DMA;
749 hw->ack_intr = ack_intr;
750/*
751 * hw->iops = iops;
752 */
753}
754
755/**
756 * ide_register_hw_with_fixup - register IDE interface
757 * @hw: hardware registers
758 * @hwifp: pointer to returned hwif
759 * @fixup: fixup function
760 *
761 * Register an IDE interface, specifying exactly the registers etc.
762 * Set init=1 iff calling before probes have taken place.
763 *
764 * Returns -1 on error.
765 */
766
767int ide_register_hw_with_fixup(hw_regs_t *hw, ide_hwif_t **hwifp, void(*fixup)(ide_hwif_t *hwif))
768{
769 int index, retry = 1;
770 ide_hwif_t *hwif;
771
772 do {
773 for (index = 0; index < MAX_HWIFS; ++index) {
774 hwif = &ide_hwifs[index];
775 if (hwif->hw.io_ports[IDE_DATA_OFFSET] == hw->io_ports[IDE_DATA_OFFSET])
776 goto found;
777 }
778 for (index = 0; index < MAX_HWIFS; ++index) {
779 hwif = &ide_hwifs[index];
780 if (hwif->hold)
781 continue;
782 if ((!hwif->present && !hwif->mate && !initializing) ||
783 (!hwif->hw.io_ports[IDE_DATA_OFFSET] && initializing))
784 goto found;
785 }
786 for (index = 0; index < MAX_HWIFS; index++)
787 ide_unregister(index);
788 } while (retry--);
789 return -1;
790found:
791 if (hwif->present)
792 ide_unregister(index);
793 else if (!hwif->hold) {
794 init_hwif_data(hwif, index);
795 init_hwif_default(hwif, index);
796 }
797 if (hwif->present)
798 return -1;
799 memcpy(&hwif->hw, hw, sizeof(*hw));
800 memcpy(hwif->io_ports, hwif->hw.io_ports, sizeof(hwif->hw.io_ports));
801 hwif->irq = hw->irq;
802 hwif->noprobe = 0;
803 hwif->chipset = hw->chipset;
4349d5cd 804 hwif->gendev.parent = hw->dev;
1da177e4
LT		 805
806 if (!initializing) {
807 probe_hwif_init_with_fixup(hwif, fixup);
808 create_proc_ide_interfaces();
809 }
810
811 if (hwifp)
812 *hwifp = hwif;
813
814 return (initializing || hwif->present) ? index : -1;
815}
816
817EXPORT_SYMBOL(ide_register_hw_with_fixup);
818
819int ide_register_hw(hw_regs_t *hw, ide_hwif_t **hwifp)
820{
821 return ide_register_hw_with_fixup(hw, hwifp, NULL);
822}
823
824EXPORT_SYMBOL(ide_register_hw);
825
826/*
827 * Locks for IDE setting functionality
828 */
829
830DECLARE_MUTEX(ide_setting_sem);
831
832/**
833 * __ide_add_setting - add an ide setting option
834 * @drive: drive to use
835 * @name: setting name
836 * @rw: true if the function is read write
837 * @read_ioctl: function to call on read
838 * @write_ioctl: function to call on write
839 * @data_type: type of data
840 * @min: range minimum
841 * @max: range maximum
842 * @mul_factor: multiplication scale
843 * @div_factor: divison scale
844 * @data: private data field
845 * @set: setting
846 * @auto_remove: setting auto removal flag
847 *
848 * Removes the setting named from the device if it is present.
849 * The function takes the settings_lock to protect against
850 * parallel changes. This function must not be called from IRQ
851 * context. Returns 0 on success or -1 on failure.
852 *
853 * BUGS: This code is seriously over-engineered. There is also
854 * magic about how the driver specific features are setup. If
855 * a driver is attached we assume the driver settings are auto
856 * remove.
857 */
858
859static int __ide_add_setting(ide_drive_t *drive, const char *name, int rw, int read_ioctl, int write_ioctl, int data_type, int min, int max, int mul_factor, int div_factor, void *data, ide_procset_t *set, int auto_remove)
860{
861 ide_settings_t **p = (ide_settings_t **) &drive->settings, *setting = NULL;
862
863 down(&ide_setting_sem);
864 while ((*p) && strcmp((*p)->name, name) < 0)
865 p = &((*p)->next);
f5e3c2fa 866 if ((setting = kzalloc(sizeof(*setting), GFP_KERNEL)) == NULL)
1da177e4 867 goto abort;
1da177e4
LT		 868 if ((setting->name = kmalloc(strlen(name) + 1, GFP_KERNEL)) == NULL)
869 goto abort;
870 strcpy(setting->name, name);
871 setting->rw = rw;
872 setting->read_ioctl = read_ioctl;
873 setting->write_ioctl = write_ioctl;
874 setting->data_type = data_type;
875 setting->min = min;
876 setting->max = max;
877 setting->mul_factor = mul_factor;
878 setting->div_factor = div_factor;
879 setting->data = data;
880 setting->set = set;
881
882 setting->next = *p;
883 if (auto_remove)
884 setting->auto_remove = 1;
885 *p = setting;
886 up(&ide_setting_sem);
887 return 0;
888abort:
889 up(&ide_setting_sem);
6044ec88 890 kfree(setting);
1da177e4
LT		 891 return -1;
892}
893
894int ide_add_setting(ide_drive_t *drive, const char *name, int rw, int read_ioctl, int write_ioctl, int data_type, int min, int max, int mul_factor, int div_factor, void *data, ide_procset_t *set)
895{
896 return __ide_add_setting(drive, name, rw, read_ioctl, write_ioctl, data_type, min, max, mul_factor, div_factor, data, set, 1);
897}
898
899EXPORT_SYMBOL(ide_add_setting);
900
901/**
902 * __ide_remove_setting - remove an ide setting option
903 * @drive: drive to use
904 * @name: setting name
905 *
906 * Removes the setting named from the device if it is present.
907 * The caller must hold the setting semaphore.
908 */
909
910static void __ide_remove_setting (ide_drive_t *drive, char *name)
911{
912 ide_settings_t **p, *setting;
913
914 p = (ide_settings_t **) &drive->settings;
915
916 while ((*p) && strcmp((*p)->name, name))
917 p = &((*p)->next);
918 if ((setting = (*p)) == NULL)
919 return;
920
921 (*p) = setting->next;
922
923 kfree(setting->name);
924 kfree(setting);
925}
926
927/**
928 * ide_find_setting_by_ioctl - find a drive specific ioctl
929 * @drive: drive to scan
930 * @cmd: ioctl command to handle
931 *
932 * Scan's the device setting table for a matching entry and returns
933 * this or NULL if no entry is found. The caller must hold the
934 * setting semaphore
935 */
936
937static ide_settings_t *ide_find_setting_by_ioctl (ide_drive_t *drive, int cmd)
938{
939 ide_settings_t *setting = drive->settings;
940
941 while (setting) {
942 if (setting->read_ioctl == cmd || setting->write_ioctl == cmd)
943 break;
944 setting = setting->next;
945 }
946
947 return setting;
948}
949
950/**
951 * ide_find_setting_by_name - find a drive specific setting
952 * @drive: drive to scan
953 * @name: setting name
954 *
955 * Scan's the device setting table for a matching entry and returns
956 * this or NULL if no entry is found. The caller must hold the
957 * setting semaphore
958 */
959
960ide_settings_t *ide_find_setting_by_name (ide_drive_t *drive, char *name)
961{
962 ide_settings_t *setting = drive->settings;
963
964 while (setting) {
965 if (strcmp(setting->name, name) == 0)
966 break;
967 setting = setting->next;
968 }
969 return setting;
970}
971
972/**
973 * auto_remove_settings - remove driver specific settings
974 * @drive: drive
975 *
976 * Automatically remove all the driver specific settings for this
9a2239b1
PZ		 977 * drive. This function may not be called from IRQ context. The
978 * caller must hold ide_setting_sem.
1da177e4
LT		 979 */
980
981static void auto_remove_settings (ide_drive_t *drive)
982{
983 ide_settings_t *setting;
984repeat:
985 setting = drive->settings;
986 while (setting) {
987 if (setting->auto_remove) {
988 __ide_remove_setting(drive, setting->name);
989 goto repeat;
990 }
991 setting = setting->next;
992 }
993}
994
995/**
996 * ide_read_setting - read an IDE setting
997 * @drive: drive to read from
998 * @setting: drive setting
999 *
1000 * Read a drive setting and return the value. The caller
1001 * must hold the ide_setting_sem when making this call.
1002 *
1003 * BUGS: the data return and error are the same return value
1004 * so an error -EINVAL and true return of the same value cannot
1005 * be told apart
1006 */
1007
1008int ide_read_setting (ide_drive_t *drive, ide_settings_t *setting)
1009{
1010 int val = -EINVAL;
1011 unsigned long flags;
1012
1013 if ((setting->rw & SETTING_READ)) {
1014 spin_lock_irqsave(&ide_lock, flags);
1015 switch(setting->data_type) {
1016 case TYPE_BYTE:
1017 val = *((u8 *) setting->data);
1018 break;
1019 case TYPE_SHORT:
1020 val = *((u16 *) setting->data);
1021 break;
1022 case TYPE_INT:
1023 case TYPE_INTA:
1024 val = *((u32 *) setting->data);
1025 break;
1026 }
1027 spin_unlock_irqrestore(&ide_lock, flags);
1028 }
1029 return val;
1030}
1031
1032/**
1033 * ide_spin_wait_hwgroup - wait for group
1034 * @drive: drive in the group
1035 *
1036 * Wait for an IDE device group to go non busy and then return
1037 * holding the ide_lock which guards the hwgroup->busy status
1038 * and right to use it.
1039 */
1040
1041int ide_spin_wait_hwgroup (ide_drive_t *drive)
1042{
1043 ide_hwgroup_t *hwgroup = HWGROUP(drive);
1044 unsigned long timeout = jiffies + (3 * HZ);
1045
1046 spin_lock_irq(&ide_lock);
1047
1048 while (hwgroup->busy) {
1049 unsigned long lflags;
1050 spin_unlock_irq(&ide_lock);
1051 local_irq_set(lflags);
1052 if (time_after(jiffies, timeout)) {
1053 local_irq_restore(lflags);
1054 printk(KERN_ERR "%s: channel busy\n", drive->name);
1055 return -EBUSY;
1056 }
1057 local_irq_restore(lflags);
1058 spin_lock_irq(&ide_lock);
1059 }
1060 return 0;
1061}
1062
1063EXPORT_SYMBOL(ide_spin_wait_hwgroup);
1064
1065/**
1066 * ide_write_setting - read an IDE setting
1067 * @drive: drive to read from
1068 * @setting: drive setting
1069 * @val: value
1070 *
1071 * Write a drive setting if it is possible. The caller
1072 * must hold the ide_setting_sem when making this call.
1073 *
1074 * BUGS: the data return and error are the same return value
1075 * so an error -EINVAL and true return of the same value cannot
1076 * be told apart
1077 *
1078 * FIXME: This should be changed to enqueue a special request
1079 * to the driver to change settings, and then wait on a sema for completion.
1080 * The current scheme of polling is kludgy, though safe enough.
1081 */
1082
1083int ide_write_setting (ide_drive_t *drive, ide_settings_t *setting, int val)
1084{
1085 int i;
1086 u32 *p;
1087
1088 if (!capable(CAP_SYS_ADMIN))
1089 return -EACCES;
1090 if (!(setting->rw & SETTING_WRITE))
1091 return -EPERM;
1092 if (val < setting->min || val > setting->max)
1093 return -EINVAL;
1094 if (setting->set)
1095 return setting->set(drive, val);
1096 if (ide_spin_wait_hwgroup(drive))
1097 return -EBUSY;
1098 switch (setting->data_type) {
1099 case TYPE_BYTE:
1100 *((u8 *) setting->data) = val;
1101 break;
1102 case TYPE_SHORT:
1103 *((u16 *) setting->data) = val;
1104 break;
1105 case TYPE_INT:
1106 *((u32 *) setting->data) = val;
1107 break;
1108 case TYPE_INTA:
1109 p = (u32 *) setting->data;
1110 for (i = 0; i < 1 << PARTN_BITS; i++, p++)
1111 *p = val;
1112 break;
1113 }
1114 spin_unlock_irq(&ide_lock);
1115 return 0;
1116}
1117
1118static int set_io_32bit(ide_drive_t *drive, int arg)
1119{
1120 drive->io_32bit = arg;
1121#ifdef CONFIG_BLK_DEV_DTC2278
1122 if (HWIF(drive)->chipset == ide_dtc2278)
1123 HWIF(drive)->drives[!drive->select.b.unit].io_32bit = arg;
1124#endif /* CONFIG_BLK_DEV_DTC2278 */
1125 return 0;
1126}
1127
1128static int set_using_dma (ide_drive_t *drive, int arg)
1129{
1130#ifdef CONFIG_BLK_DEV_IDEDMA
1131 if (!drive->id || !(drive->id->capability & 1))
1132 return -EPERM;
1133 if (HWIF(drive)->ide_dma_check == NULL)
1134 return -EPERM;
1135 if (arg) {
3608b5d7
BZ		 1136 if (ide_set_dma(drive))
1137 return -EIO;
1da177e4 1138 if (HWIF(drive)->ide_dma_on(drive)) return -EIO;
7469aaf6
BZ		 1139 } else
1140 ide_dma_off(drive);
1da177e4
LT		 1141 return 0;
1142#else
1143 return -EPERM;
1144#endif
1145}
1146
1147static int set_pio_mode (ide_drive_t *drive, int arg)
1148{
1149 struct request rq;
1150
1151 if (!HWIF(drive)->tuneproc)
1152 return -ENOSYS;
1153 if (drive->special.b.set_tune)
1154 return -EBUSY;
1155 ide_init_drive_cmd(&rq);
1156 drive->tune_req = (u8) arg;
1157 drive->special.b.set_tune = 1;
1158 (void) ide_do_drive_cmd(drive, &rq, ide_wait);
1159 return 0;
1160}
1161
1162static int set_xfer_rate (ide_drive_t *drive, int arg)
1163{
1164 int err = ide_wait_cmd(drive,
1165 WIN_SETFEATURES, (u8) arg,
1166 SETFEATURES_XFER, 0, NULL);
1167
1168 if (!err && arg) {
1169 ide_set_xfer_rate(drive, (u8) arg);
1170 ide_driveid_update(drive);
1171 }
1172 return err;
1173}
1174
1175/**
1176 * ide_add_generic_settings - generic ide settings
1177 * @drive: drive being configured
1178 *
1179 * Add the generic parts of the system settings to the /proc files and
1180 * ioctls for this IDE device. The caller must not be holding the
1181 * ide_setting_sem.
1182 */
1183
1184void ide_add_generic_settings (ide_drive_t *drive)
1185{
1186/*
1187 * drive setting name read/write access read ioctl write ioctl data type min max mul_factor div_factor data pointer set function
1188 */
1189 __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);
1190 __ide_add_setting(drive, "keepsettings", SETTING_RW, HDIO_GET_KEEPSETTINGS, HDIO_SET_KEEPSETTINGS, TYPE_BYTE, 0, 1, 1, 1, &drive->keep_settings, NULL, 0);
1191 __ide_add_setting(drive, "nice1", SETTING_RW, -1, -1, TYPE_BYTE, 0, 1, 1, 1, &drive->nice1, NULL, 0);
1192 __ide_add_setting(drive, "pio_mode", SETTING_WRITE, -1, HDIO_SET_PIO_MODE, TYPE_BYTE, 0, 255, 1, 1, NULL, set_pio_mode, 0);
1193 __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);
1194 __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);
1195 __ide_add_setting(drive, "init_speed", SETTING_RW, -1, -1, TYPE_BYTE, 0, 70, 1, 1, &drive->init_speed, NULL, 0);
1196 __ide_add_setting(drive, "current_speed", SETTING_RW, -1, -1, TYPE_BYTE, 0, 70, 1, 1, &drive->current_speed, set_xfer_rate, 0);
1197 __ide_add_setting(drive, "number", SETTING_RW, -1, -1, TYPE_BYTE, 0, 3, 1, 1, &drive->dn, NULL, 0);
1198}
1199
1200/**
1201 * system_bus_clock - clock guess
1202 *
1203 * External version of the bus clock guess used by very old IDE drivers
1204 * for things like VLB timings. Should not be used.
1205 */
1206
1207int system_bus_clock (void)
1208{
1209 return((int) ((!system_bus_speed) ? ide_system_bus_speed() : system_bus_speed ));
1210}
1211
1212EXPORT_SYMBOL(system_bus_clock);
1213
b887d2e6 1214static int generic_ide_suspend(struct device *dev, pm_message_t mesg)
1da177e4
LT		 1215{
1216 ide_drive_t *drive = dev->driver_data;
e3a59b4d 1217 ide_hwif_t *hwif = HWIF(drive);
1da177e4
LT		 1218 struct request rq;
1219 struct request_pm_state rqpm;
1220 ide_task_t args;
1221
e3a59b4d
HR		 1222 /* Call ACPI _GTM only once */
1223 if (!(drive->dn % 2))
1224 ide_acpi_get_timing(hwif);
1225
1da177e4
LT		 1226 memset(&rq, 0, sizeof(rq));
1227 memset(&rqpm, 0, sizeof(rqpm));
1228 memset(&args, 0, sizeof(args));
4aff5e23 1229 rq.cmd_type = REQ_TYPE_PM_SUSPEND;
1da177e4 1230 rq.special = &args;
c00895ab 1231 rq.data = &rqpm;
1da177e4 1232 rqpm.pm_step = ide_pm_state_start_suspend;
b887d2e6
DB		 1233 if (mesg.event == PM_EVENT_PRETHAW)
1234 mesg.event = PM_EVENT_FREEZE;
1235 rqpm.pm_state = mesg.event;
1da177e4
LT		 1236
1237 return ide_do_drive_cmd(drive, &rq, ide_wait);
1238}
1239
1240static int generic_ide_resume(struct device *dev)
1241{
1242 ide_drive_t *drive = dev->driver_data;
e3a59b4d 1243 ide_hwif_t *hwif = HWIF(drive);
1da177e4
LT		 1244 struct request rq;
1245 struct request_pm_state rqpm;
1246 ide_task_t args;
1247
e3a59b4d
HR		 1248 /* Call ACPI _STM only once */
1249 if (!(drive->dn % 2))
1250 ide_acpi_push_timing(hwif);
1251
1252 ide_acpi_exec_tfs(drive);
1253
1da177e4
LT		 1254 memset(&rq, 0, sizeof(rq));
1255 memset(&rqpm, 0, sizeof(rqpm));
1256 memset(&args, 0, sizeof(args));
4aff5e23 1257 rq.cmd_type = REQ_TYPE_PM_RESUME;
1da177e4 1258 rq.special = &args;
c00895ab 1259 rq.data = &rqpm;
1da177e4 1260 rqpm.pm_step = ide_pm_state_start_resume;
ca078bae 1261 rqpm.pm_state = PM_EVENT_ON;
1da177e4
LT		 1262
1263 return ide_do_drive_cmd(drive, &rq, ide_head_wait);
1264}
1265
1266int generic_ide_ioctl(ide_drive_t *drive, struct file *file, struct block_device *bdev,
1267 unsigned int cmd, unsigned long arg)
1268{
1269 ide_settings_t *setting;
1270 ide_driver_t *drv;
1271 int err = 0;
1272 void __user *p = (void __user *)arg;
1273
1274 down(&ide_setting_sem);
1275 if ((setting = ide_find_setting_by_ioctl(drive, cmd)) != NULL) {
1276 if (cmd == setting->read_ioctl) {
1277 err = ide_read_setting(drive, setting);
1278 up(&ide_setting_sem);
1279 return err >= 0 ? put_user(err, (long __user *)arg) : err;
1280 } else {
1281 if (bdev != bdev->bd_contains)
1282 err = -EINVAL;
1283 else
1284 err = ide_write_setting(drive, setting, arg);
1285 up(&ide_setting_sem);
1286 return err;
1287 }
1288 }
1289 up(&ide_setting_sem);
1290
1291 switch (cmd) {
1da177e4
LT		 1292 case HDIO_OBSOLETE_IDENTITY:
1293 case HDIO_GET_IDENTITY:
1294 if (bdev != bdev->bd_contains)
1295 return -EINVAL;
1296 if (drive->id_read == 0)
1297 return -ENOMSG;
1298 if (copy_to_user(p, drive->id, (cmd == HDIO_GET_IDENTITY) ? sizeof(*drive->id) : 142))
1299 return -EFAULT;
1300 return 0;
1301
1302 case HDIO_GET_NICE:
1303 return put_user(drive->dsc_overlap << IDE_NICE_DSC_OVERLAP |
1304 drive->atapi_overlap << IDE_NICE_ATAPI_OVERLAP |
1305 drive->nice0 << IDE_NICE_0 |
1306 drive->nice1 << IDE_NICE_1 |
1307 drive->nice2 << IDE_NICE_2,
1308 (long __user *) arg);
1309
1310#ifdef CONFIG_IDE_TASK_IOCTL
1311 case HDIO_DRIVE_TASKFILE:
1312 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
1313 return -EACCES;
1314 switch(drive->media) {
1315 case ide_disk:
1316 return ide_taskfile_ioctl(drive, cmd, arg);
1317 default:
1318 return -ENOMSG;
1319 }
1320#endif /* CONFIG_IDE_TASK_IOCTL */
1321
1322 case HDIO_DRIVE_CMD:
1323 if (!capable(CAP_SYS_RAWIO))
1324 return -EACCES;
1325 return ide_cmd_ioctl(drive, cmd, arg);
1326
1327 case HDIO_DRIVE_TASK:
1328 if (!capable(CAP_SYS_RAWIO))
1329 return -EACCES;
1330 return ide_task_ioctl(drive, cmd, arg);
1331
1332 case HDIO_SCAN_HWIF:
1333 {
1334 hw_regs_t hw;
1335 int args[3];
1336 if (!capable(CAP_SYS_RAWIO)) return -EACCES;
1337 if (copy_from_user(args, p, 3 * sizeof(int)))
1338 return -EFAULT;
1339 memset(&hw, 0, sizeof(hw));
1340 ide_init_hwif_ports(&hw, (unsigned long) args[0],
1341 (unsigned long) args[1], NULL);
1342 hw.irq = args[2];
1343 if (ide_register_hw(&hw, NULL) == -1)
1344 return -EIO;
1345 return 0;
1346 }
1347 case HDIO_UNREGISTER_HWIF:
1348 if (!capable(CAP_SYS_RAWIO)) return -EACCES;
1349 /* (arg > MAX_HWIFS) checked in function */
1350 ide_unregister(arg);
1351 return 0;
1352 case HDIO_SET_NICE:
1353 if (!capable(CAP_SYS_ADMIN)) return -EACCES;
1354 if (arg != (arg & ((1 << IDE_NICE_DSC_OVERLAP) | (1 << IDE_NICE_1))))
1355 return -EPERM;
1356 drive->dsc_overlap = (arg >> IDE_NICE_DSC_OVERLAP) & 1;
1357 drv = *(ide_driver_t **)bdev->bd_disk->private_data;
1358 if (drive->dsc_overlap && !drv->supports_dsc_overlap) {
1359 drive->dsc_overlap = 0;
1360 return -EPERM;
1361 }
1362 drive->nice1 = (arg >> IDE_NICE_1) & 1;
1363 return 0;
1364 case HDIO_DRIVE_RESET:
1365 {
1366 unsigned long flags;
1367 if (!capable(CAP_SYS_ADMIN)) return -EACCES;
1368
1369 /*
1370 * Abort the current command on the
1371 * group if there is one, taking
1372 * care not to allow anything else
1373 * to be queued and to die on the
1374 * spot if we miss one somehow
1375 */
1376
1377 spin_lock_irqsave(&ide_lock, flags);
1378
913759ac
AC		 1379 if (HWGROUP(drive)->resetting) {
1380 spin_unlock_irqrestore(&ide_lock, flags);
1381 return -EBUSY;
1382 }
1383
1da177e4
LT		 1384 ide_abort(drive, "drive reset");
1385
125e1874 1386 BUG_ON(HWGROUP(drive)->handler);
1da177e4
LT		 1387
1388 /* Ensure nothing gets queued after we
1389 drop the lock. Reset will clear the busy */
1390
1391 HWGROUP(drive)->busy = 1;
1392 spin_unlock_irqrestore(&ide_lock, flags);
1393 (void) ide_do_reset(drive);
1394
1395 return 0;
1396 }
1397
1398 case CDROMEJECT:
1399 case CDROMCLOSETRAY:
1400 return scsi_cmd_ioctl(file, bdev->bd_disk, cmd, p);
1401
1402 case HDIO_GET_BUSSTATE:
1403 if (!capable(CAP_SYS_ADMIN))
1404 return -EACCES;
1405 if (put_user(HWIF(drive)->bus_state, (long __user *)arg))
1406 return -EFAULT;
1407 return 0;
1408
1409 case HDIO_SET_BUSSTATE:
1410 if (!capable(CAP_SYS_ADMIN))
1411 return -EACCES;
1412 if (HWIF(drive)->busproc)
1413 return HWIF(drive)->busproc(drive, (int)arg);
1414 return -EOPNOTSUPP;
1415 default:
1416 return -EINVAL;
1417 }
1418}
1419
1420EXPORT_SYMBOL(generic_ide_ioctl);
1421
1422/*
1423 * stridx() returns the offset of c within s,
1424 * or -1 if c is '\0' or not found within s.
1425 */
1426static int __init stridx (const char *s, char c)
1427{
1428 char *i = strchr(s, c);
1429 return (i && c) ? i - s : -1;
1430}
1431
1432/*
1433 * match_parm() does parsing for ide_setup():
1434 *
1435 * 1. the first char of s must be '='.
1436 * 2. if the remainder matches one of the supplied keywords,
1437 * the index (1 based) of the keyword is negated and returned.
1438 * 3. if the remainder is a series of no more than max_vals numbers
1439 * separated by commas, the numbers are saved in vals[] and a
1440 * count of how many were saved is returned. Base10 is assumed,
1441 * and base16 is allowed when prefixed with "0x".
1442 * 4. otherwise, zero is returned.
1443 */
1444static int __init match_parm (char *s, const char *keywords[], int vals[], int max_vals)
1445{
1446 static const char *decimal = "0123456789";
1447 static const char *hex = "0123456789abcdef";
1448 int i, n;
1449
1450 if (*s++ == '=') {
1451 /*
1452 * Try matching against the supplied keywords,
1453 * and return -(index+1) if we match one
1454 */
1455 if (keywords != NULL) {
1456 for (i = 0; *keywords != NULL; ++i) {
1457 if (!strcmp(s, *keywords++))
1458 return -(i+1);
1459 }
1460 }
1461 /*
1462 * Look for a series of no more than "max_vals"
1463 * numeric values separated by commas, in base10,
1464 * or base16 when prefixed with "0x".
1465 * Return a count of how many were found.
1466 */
1467 for (n = 0; (i = stridx(decimal, *s)) >= 0;) {
1468 vals[n] = i;
1469 while ((i = stridx(decimal, *++s)) >= 0)
1470 vals[n] = (vals[n] * 10) + i;
1471 if (*s == 'x' && !vals[n]) {
1472 while ((i = stridx(hex, *++s)) >= 0)
1473 vals[n] = (vals[n] * 0x10) + i;
1474 }
1475 if (++n == max_vals)
1476 break;
1477 if (*s == ',' || *s == ';')
1478 ++s;
1479 }
1480 if (!*s)
1481 return n;
1482 }
1483 return 0; /* zero = nothing matched */
1484}
1485
1486#ifdef CONFIG_BLK_DEV_ALI14XX
1487static int __initdata probe_ali14xx;
1488extern int ali14xx_init(void);
1489#endif
1490#ifdef CONFIG_BLK_DEV_UMC8672
1491static int __initdata probe_umc8672;
1492extern int umc8672_init(void);
1493#endif
1494#ifdef CONFIG_BLK_DEV_DTC2278
1495static int __initdata probe_dtc2278;
1496extern int dtc2278_init(void);
1497#endif
1498#ifdef CONFIG_BLK_DEV_HT6560B
1499static int __initdata probe_ht6560b;
1500extern int ht6560b_init(void);
1501#endif
1502#ifdef CONFIG_BLK_DEV_QD65XX
1503static int __initdata probe_qd65xx;
1504extern int qd65xx_init(void);
1505#endif
1506
1507static int __initdata is_chipset_set[MAX_HWIFS];
1508
1509/*
1510 * ide_setup() gets called VERY EARLY during initialization,
1511 * to handle kernel "command line" strings beginning with "hdx=" or "ide".
1512 *
1513 * Remember to update Documentation/ide.txt if you change something here.
1514 */
1515static int __init ide_setup(char *s)
1516{
1517 int i, vals[3];
1518 ide_hwif_t *hwif;
1519 ide_drive_t *drive;
1520 unsigned int hw, unit;
1521 const char max_drive = 'a' + ((MAX_HWIFS * MAX_DRIVES) - 1);
1522 const char max_hwif = '0' + (MAX_HWIFS - 1);
1523
1524
1525 if (strncmp(s,"hd",2) == 0 && s[2] == '=') /* hd= is for hd.c */
1526 return 0; /* driver and not us */
1527
1528 if (strncmp(s,"ide",3) && strncmp(s,"idebus",6) && strncmp(s,"hd",2))
1529 return 0;
1530
1531 printk(KERN_INFO "ide_setup: %s", s);
1532 init_ide_data ();
1533
1534#ifdef CONFIG_BLK_DEV_IDEDOUBLER
1535 if (!strcmp(s, "ide=doubler")) {
1536 extern int ide_doubler;
1537
1538 printk(" : Enabled support for IDE doublers\n");
1539 ide_doubler = 1;
1540 return 1;
1541 }
1542#endif /* CONFIG_BLK_DEV_IDEDOUBLER */
1543
1544 if (!strcmp(s, "ide=nodma")) {
1545 printk(" : Prevented DMA\n");
1546 noautodma = 1;
1547 return 1;
1548 }
1549
1550#ifdef CONFIG_BLK_DEV_IDEPCI
1551 if (!strcmp(s, "ide=reverse")) {
1552 ide_scan_direction = 1;
1553 printk(" : Enabled support for IDE inverse scan order.\n");
1554 return 1;
1555 }
1556#endif /* CONFIG_BLK_DEV_IDEPCI */
1557
e3a59b4d
HR		 1558#ifdef CONFIG_BLK_DEV_IDEACPI
1559 if (!strcmp(s, "ide=noacpi")) {
1560 //printk(" : Disable IDE ACPI support.\n");
1561 ide_noacpi = 1;
1562 return 1;
1563 }
1564 if (!strcmp(s, "ide=acpigtf")) {
1565 //printk(" : Enable IDE ACPI _GTF support.\n");
1566 ide_noacpitfs = 0;
1567 return 1;
1568 }
1569 if (!strcmp(s, "ide=acpionboot")) {
1570 //printk(" : Call IDE ACPI methods on boot.\n");
1571 ide_noacpionboot = 0;
1572 return 1;
1573 }
1574#endif /* CONFIG_BLK_DEV_IDEACPI */
1575
1da177e4
LT		 1576 /*
1577 * Look for drive options: "hdx="
1578 */
1579 if (s[0] == 'h' && s[1] == 'd' && s[2] >= 'a' && s[2] <= max_drive) {
1580 const char *hd_words[] = {
1581 "none", "noprobe", "nowerr", "cdrom", "serialize",
1582 "autotune", "noautotune", "minus8", "swapdata", "bswap",
36193484 1583 "noflush", "remap", "remap63", "scsi", NULL };
1da177e4
LT		 1584 unit = s[2] - 'a';
1585 hw = unit / MAX_DRIVES;
1586 unit = unit % MAX_DRIVES;
1587 hwif = &ide_hwifs[hw];
1588 drive = &hwif->drives[unit];
1589 if (strncmp(s + 4, "ide-", 4) == 0) {
1590 strlcpy(drive->driver_req, s + 4, sizeof(drive->driver_req));
1591 goto done;
1592 }
1593 switch (match_parm(&s[3], hd_words, vals, 3)) {
1594 case -1: /* "none" */
1595 case -2: /* "noprobe" */
1596 drive->noprobe = 1;
1597 goto done;
1598 case -3: /* "nowerr" */
1599 drive->bad_wstat = BAD_R_STAT;
1600 hwif->noprobe = 0;
1601 goto done;
1602 case -4: /* "cdrom" */
1603 drive->present = 1;
1604 drive->media = ide_cdrom;
1605 /* an ATAPI device ignores DRDY */
1606 drive->ready_stat = 0;
1607 hwif->noprobe = 0;
1608 goto done;
1609 case -5: /* "serialize" */
1610 printk(" -- USE \"ide%d=serialize\" INSTEAD", hw);
1611 goto do_serialize;
1612 case -6: /* "autotune" */
1613 drive->autotune = IDE_TUNE_AUTO;
1614 goto obsolete_option;
1615 case -7: /* "noautotune" */
1616 drive->autotune = IDE_TUNE_NOAUTO;
1617 goto obsolete_option;
1618 case -9: /* "swapdata" */
1619 case -10: /* "bswap" */
1620 drive->bswap = 1;
1621 goto done;
36193484
JA		 1622 case -11: /* noflush */
1623 drive->noflush = 1;
1624 goto done;
1da177e4
LT		 1625 case -12: /* "remap" */
1626 drive->remap_0_to_1 = 1;
1627 goto done;
1628 case -13: /* "remap63" */
1629 drive->sect0 = 63;
1630 goto done;
1631 case -14: /* "scsi" */
1632 drive->scsi = 1;
1633 goto done;
1634 case 3: /* cyl,head,sect */
1635 drive->media = ide_disk;
1636 drive->ready_stat = READY_STAT;
1637 drive->cyl = drive->bios_cyl = vals[0];
1638 drive->head = drive->bios_head = vals[1];
1639 drive->sect = drive->bios_sect = vals[2];
1640 drive->present = 1;
1641 drive->forced_geom = 1;
1642 hwif->noprobe = 0;
1643 goto done;
1644 default:
1645 goto bad_option;
1646 }
1647 }
1648
1649 if (s[0] != 'i' || s[1] != 'd' || s[2] != 'e')
1650 goto bad_option;
1651 /*
1652 * Look for bus speed option: "idebus="
1653 */
1654 if (s[3] == 'b' && s[4] == 'u' && s[5] == 's') {
1655 if (match_parm(&s[6], NULL, vals, 1) != 1)
1656 goto bad_option;
1657 if (vals[0] >= 20 && vals[0] <= 66) {
1658 idebus_parameter = vals[0];
1659 } else
1660 printk(" -- BAD BUS SPEED! Expected value from 20 to 66");
1661 goto done;
1662 }
1663 /*
1664 * Look for interface options: "idex="
1665 */
1666 if (s[3] >= '0' && s[3] <= max_hwif) {
1667 /*
1668 * Be VERY CAREFUL changing this: note hardcoded indexes below
1669 * (-8, -9, -10) are reserved to ease the hardcoding.
1670 */
1671 static const char *ide_words[] = {
1672 "noprobe", "serialize", "autotune", "noautotune",
1673 "reset", "dma", "ata66", "minus8", "minus9",
1674 "minus10", "four", "qd65xx", "ht6560b", "cmd640_vlb",
1675 "dtc2278", "umc8672", "ali14xx", NULL };
1676 hw = s[3] - '0';
1677 hwif = &ide_hwifs[hw];
1678 i = match_parm(&s[4], ide_words, vals, 3);
1679
1680 /*
1681 * Cryptic check to ensure chipset not already set for hwif.
1682 * Note: we can't depend on hwif->chipset here.
1683 */
1684 if ((i >= -18 && i <= -11) || (i > 0 && i <= 3)) {
1685 /* chipset already specified */
1686 if (is_chipset_set[hw])
1687 goto bad_option;
1688 if (i > -18 && i <= -11) {
1689 /* these drivers are for "ide0=" only */
1690 if (hw != 0)
1691 goto bad_hwif;
1692 /* chipset already specified for 2nd port */
1693 if (is_chipset_set[hw+1])
1694 goto bad_option;
1695 }
1696 is_chipset_set[hw] = 1;
1697 printk("\n");
1698 }
1699
1700 switch (i) {
1701#ifdef CONFIG_BLK_DEV_ALI14XX
1702 case -17: /* "ali14xx" */
1703 probe_ali14xx = 1;
1704 goto done;
1705#endif
1706#ifdef CONFIG_BLK_DEV_UMC8672
1707 case -16: /* "umc8672" */
1708 probe_umc8672 = 1;
1709 goto done;
1710#endif
1711#ifdef CONFIG_BLK_DEV_DTC2278
1712 case -15: /* "dtc2278" */
1713 probe_dtc2278 = 1;
1714 goto done;
1715#endif
1716#ifdef CONFIG_BLK_DEV_CMD640
1717 case -14: /* "cmd640_vlb" */
1718 {
1719 extern int cmd640_vlb; /* flag for cmd640.c */
1720 cmd640_vlb = 1;
1721 goto done;
1722 }
1723#endif
1724#ifdef CONFIG_BLK_DEV_HT6560B
1725 case -13: /* "ht6560b" */
1726 probe_ht6560b = 1;
1727 goto done;
1728#endif
1729#ifdef CONFIG_BLK_DEV_QD65XX
1730 case -12: /* "qd65xx" */
1731 probe_qd65xx = 1;
1732 goto done;
1733#endif
1734#ifdef CONFIG_BLK_DEV_4DRIVES
1735 case -11: /* "four" drives on one set of ports */
1736 {
1737 ide_hwif_t *mate = &ide_hwifs[hw^1];
1738 mate->drives[0].select.all ^= 0x20;
1739 mate->drives[1].select.all ^= 0x20;
1740 hwif->chipset = mate->chipset = ide_4drives;
1741 mate->irq = hwif->irq;
1742 memcpy(mate->io_ports, hwif->io_ports, sizeof(hwif->io_ports));
1743 goto do_serialize;
1744 }
1745#endif /* CONFIG_BLK_DEV_4DRIVES */
1746 case -10: /* minus10 */
1747 case -9: /* minus9 */
1748 case -8: /* minus8 */
1749 goto bad_option;
1750 case -7: /* ata66 */
1751#ifdef CONFIG_BLK_DEV_IDEPCI
1752 hwif->udma_four = 1;
1753 goto obsolete_option;
1754#else
1755 goto bad_hwif;
1756#endif
1757 case -6: /* dma */
1758 hwif->autodma = 1;
1759 goto obsolete_option;
1760 case -5: /* "reset" */
1761 hwif->reset = 1;
1762 goto obsolete_option;
1763 case -4: /* "noautotune" */
1764 hwif->drives[0].autotune = IDE_TUNE_NOAUTO;
1765 hwif->drives[1].autotune = IDE_TUNE_NOAUTO;
1766 goto obsolete_option;
1767 case -3: /* "autotune" */
1768 hwif->drives[0].autotune = IDE_TUNE_AUTO;
1769 hwif->drives[1].autotune = IDE_TUNE_AUTO;
1770 goto obsolete_option;
1771 case -2: /* "serialize" */
1772 do_serialize:
1773 hwif->mate = &ide_hwifs[hw^1];
1774 hwif->mate->mate = hwif;
1775 hwif->serialized = hwif->mate->serialized = 1;
1776 goto obsolete_option;
1777
1778 case -1: /* "noprobe" */
1779 hwif->noprobe = 1;
1780 goto done;
1781
1782 case 1: /* base */
1783 vals[1] = vals[0] + 0x206; /* default ctl */
1784 case 2: /* base,ctl */
1785 vals[2] = 0; /* default irq = probe for it */
1786 case 3: /* base,ctl,irq */
1787 hwif->hw.irq = vals[2];
1788 ide_init_hwif_ports(&hwif->hw, (unsigned long) vals[0], (unsigned long) vals[1], &hwif->irq);
1789 memcpy(hwif->io_ports, hwif->hw.io_ports, sizeof(hwif->io_ports));
1790 hwif->irq = vals[2];
1791 hwif->noprobe = 0;
1792 hwif->chipset = ide_forced;
1793 goto obsolete_option;
1794
1795 case 0: goto bad_option;
1796 default:
1797 printk(" -- SUPPORT NOT CONFIGURED IN THIS KERNEL\n");
1798 return 1;
1799 }
1800 }
1801bad_option:
1802 printk(" -- BAD OPTION\n");
1803 return 1;
1804obsolete_option:
1805 printk(" -- OBSOLETE OPTION, WILL BE REMOVED SOON!\n");
1806 return 1;
1807bad_hwif:
1808 printk("-- NOT SUPPORTED ON ide%d", hw);
1809done:
1810 printk("\n");
1811 return 1;
1812}
1813
eb797227
AV		 1814extern void __init pnpide_init(void);
1815extern void __exit pnpide_exit(void);
1816extern void __init h8300_ide_init(void);
1da177e4
LT		 1817
1818/*
1819 * probe_for_hwifs() finds/initializes "known" IDE interfaces
1820 */
1821static void __init probe_for_hwifs (void)
1822{
1823#ifdef CONFIG_BLK_DEV_IDEPCI
1824 ide_scan_pcibus(ide_scan_direction);
1825#endif /* CONFIG_BLK_DEV_IDEPCI */
1826
1827#ifdef CONFIG_ETRAX_IDE
1828 {
1829 extern void init_e100_ide(void);
1830 init_e100_ide();
1831 }
1832#endif /* CONFIG_ETRAX_IDE */
1833#ifdef CONFIG_BLK_DEV_CMD640
1834 {
1835 extern void ide_probe_for_cmd640x(void);
1836 ide_probe_for_cmd640x();
1837 }
1838#endif /* CONFIG_BLK_DEV_CMD640 */
1839#ifdef CONFIG_BLK_DEV_IDE_PMAC
1840 {
9e5755bc
AM		 1841 extern int pmac_ide_probe(void);
1842 (void)pmac_ide_probe();
1da177e4
LT		 1843 }
1844#endif /* CONFIG_BLK_DEV_IDE_PMAC */
1845#ifdef CONFIG_BLK_DEV_GAYLE
1846 {
1847 extern void gayle_init(void);
1848 gayle_init();
1849 }
1850#endif /* CONFIG_BLK_DEV_GAYLE */
1851#ifdef CONFIG_BLK_DEV_FALCON_IDE
1852 {
1853 extern void falconide_init(void);
1854 falconide_init();
1855 }
1856#endif /* CONFIG_BLK_DEV_FALCON_IDE */
1857#ifdef CONFIG_BLK_DEV_MAC_IDE
1858 {
1859 extern void macide_init(void);
1860 macide_init();
1861 }
1862#endif /* CONFIG_BLK_DEV_MAC_IDE */
1863#ifdef CONFIG_BLK_DEV_Q40IDE
1864 {
1865 extern void q40ide_init(void);
1866 q40ide_init();
1867 }
1868#endif /* CONFIG_BLK_DEV_Q40IDE */
1869#ifdef CONFIG_BLK_DEV_BUDDHA
1870 {
1871 extern void buddha_init(void);
1872 buddha_init();
1873 }
1874#endif /* CONFIG_BLK_DEV_BUDDHA */
1875#ifdef CONFIG_BLK_DEV_IDEPNP
1876 pnpide_init();
1877#endif
1878#ifdef CONFIG_H8300
1879 h8300_ide_init();
1880#endif
1881}
1882
8604affd 1883void ide_register_subdriver(ide_drive_t *drive, ide_driver_t *driver)
1da177e4 1884{
1da177e4 1885#ifdef CONFIG_PROC_FS
8604affd 1886 ide_add_proc_entries(drive->proc, driver->proc, drive);
1da177e4 1887#endif
1da177e4
LT		 1888}
1889
1890EXPORT_SYMBOL(ide_register_subdriver);
1891
1892/**
1893 * ide_unregister_subdriver - disconnect drive from driver
1894 * @drive: drive to unplug
8604affd 1895 * @driver: driver
1da177e4
LT		 1896 *
1897 * Disconnect a drive from the driver it was attached to and then
1898 * clean up the various proc files and other objects attached to it.
1899 *
8604affd 1900 * Takes ide_setting_sem and ide_lock.
1da177e4 1901 * Caller must hold none of the locks.
1da177e4
LT		 1902 */
1903
8604affd 1904void ide_unregister_subdriver(ide_drive_t *drive, ide_driver_t *driver)
1da177e4
LT		 1905{
1906 unsigned long flags;
1907
1da177e4 1908#ifdef CONFIG_PROC_FS
8604affd 1909 ide_remove_proc_entries(drive->proc, driver->proc);
1da177e4 1910#endif
9a2239b1
PZ		 1911 down(&ide_setting_sem);
1912 spin_lock_irqsave(&ide_lock, flags);
1913 /*
1914 * ide_setting_sem protects the settings list
1915 * ide_lock protects the use of settings
1916 *
1917 * so we need to hold both, ide_settings_sem because we want to
1918 * modify the settings list, and ide_lock because we cannot take
1919 * a setting out that is being used.
1920 *
1921 * OTOH both ide_{read,write}_setting are only ever used under
1922 * ide_setting_sem.
1923 */
1da177e4 1924 auto_remove_settings(drive);
1da177e4
LT		 1925 spin_unlock_irqrestore(&ide_lock, flags);
1926 up(&ide_setting_sem);
1da177e4
LT		 1927}
1928
1929EXPORT_SYMBOL(ide_unregister_subdriver);
1930
1da177e4
LT		 1931/*
1932 * Probe module
1933 */
1934
1935EXPORT_SYMBOL(ide_lock);
1936
8604affd
BZ		 1937static int ide_bus_match(struct device *dev, struct device_driver *drv)
1938{
1939 return 1;
1940}
1941
263756ec
KS		 1942static char *media_string(ide_drive_t *drive)
1943{
1944 switch (drive->media) {
1945 case ide_disk:
1946 return "disk";
1947 case ide_cdrom:
1948 return "cdrom";
1949 case ide_tape:
1950 return "tape";
1951 case ide_floppy:
1952 return "floppy";
1953 default:
1954 return "UNKNOWN";
1955 }
1956}
1957
1958static ssize_t media_show(struct device *dev, struct device_attribute *attr, char *buf)
1959{
1960 ide_drive_t *drive = to_ide_device(dev);
1961 return sprintf(buf, "%s\n", media_string(drive));
1962}
1963
1964static ssize_t drivename_show(struct device *dev, struct device_attribute *attr, char *buf)
1965{
1966 ide_drive_t *drive = to_ide_device(dev);
1967 return sprintf(buf, "%s\n", drive->name);
1968}
1969
1970static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf)
1971{
1972 ide_drive_t *drive = to_ide_device(dev);
1973 return sprintf(buf, "ide:m-%s\n", media_string(drive));
1974}
1975
1976static struct device_attribute ide_dev_attrs[] = {
1977 __ATTR_RO(media),
1978 __ATTR_RO(drivename),
1979 __ATTR_RO(modalias),
1980 __ATTR_NULL
1981};
1982
1983static int ide_uevent(struct device *dev, char **envp, int num_envp,
1984 char *buffer, int buffer_size)
1985{
1986 ide_drive_t *drive = to_ide_device(dev);
1987 int i = 0;
1988 int length = 0;
1989
1990 add_uevent_var(envp, num_envp, &i, buffer, buffer_size, &length,
1991 "MEDIA=%s", media_string(drive));
1992 add_uevent_var(envp, num_envp, &i, buffer, buffer_size, &length,
1993 "DRIVENAME=%s", drive->name);
1994 add_uevent_var(envp, num_envp, &i, buffer, buffer_size, &length,
1995 "MODALIAS=ide:m-%s", media_string(drive));
1996 envp[i] = NULL;
1997 return 0;
1998}
1999
4031bbe4
RK		 2000static int generic_ide_probe(struct device *dev)
2001{
2002 ide_drive_t *drive = to_ide_device(dev);
2003 ide_driver_t *drv = to_ide_driver(dev->driver);
2004
2005 return drv->probe ? drv->probe(drive) : -ENODEV;
2006}
2007
2008static int generic_ide_remove(struct device *dev)
2009{
2010 ide_drive_t *drive = to_ide_device(dev);
2011 ide_driver_t *drv = to_ide_driver(dev->driver);
2012
2013 if (drv->remove)
2014 drv->remove(drive);
2015
2016 return 0;
2017}
2018
2019static void generic_ide_shutdown(struct device *dev)
2020{
2021 ide_drive_t *drive = to_ide_device(dev);
2022 ide_driver_t *drv = to_ide_driver(dev->driver);
2023
2024 if (dev->driver && drv->shutdown)
2025 drv->shutdown(drive);
2026}
2027
1da177e4
LT		 2028struct bus_type ide_bus_type = {
2029 .name = "ide",
8604affd 2030 .match = ide_bus_match,
263756ec 2031 .uevent = ide_uevent,
4031bbe4
RK		 2032 .probe = generic_ide_probe,
2033 .remove = generic_ide_remove,
2034 .shutdown = generic_ide_shutdown,
263756ec 2035 .dev_attrs = ide_dev_attrs,
1da177e4
LT		 2036 .suspend = generic_ide_suspend,
2037 .resume = generic_ide_resume,
2038};
2039
8604affd
BZ		 2040EXPORT_SYMBOL_GPL(ide_bus_type);
2041
1da177e4
LT		 2042/*
2043 * This is gets invoked once during initialization, to set *everything* up
2044 */
2045static int __init ide_init(void)
2046{
349ae23f
RD		 2047 int ret;
2048
1da177e4 2049 printk(KERN_INFO "Uniform Multi-Platform E-IDE driver " REVISION "\n");
1da177e4
LT		 2050 system_bus_speed = ide_system_bus_speed();
2051
349ae23f
RD		 2052 ret = bus_register(&ide_bus_type);
2053 if (ret < 0) {
2054 printk(KERN_WARNING "IDE: bus_register error: %d\n", ret);
2055 return ret;
2056 }
1da177e4
LT		 2057
2058 init_ide_data();
2059
2060#ifdef CONFIG_PROC_FS
2061 proc_ide_root = proc_mkdir("ide", NULL);
2062#endif
2063
2064#ifdef CONFIG_BLK_DEV_ALI14XX
2065 if (probe_ali14xx)
2066 (void)ali14xx_init();
2067#endif
2068#ifdef CONFIG_BLK_DEV_UMC8672
2069 if (probe_umc8672)
2070 (void)umc8672_init();
2071#endif
2072#ifdef CONFIG_BLK_DEV_DTC2278
2073 if (probe_dtc2278)
2074 (void)dtc2278_init();
2075#endif
2076#ifdef CONFIG_BLK_DEV_HT6560B
2077 if (probe_ht6560b)
2078 (void)ht6560b_init();
2079#endif
2080#ifdef CONFIG_BLK_DEV_QD65XX
2081 if (probe_qd65xx)
2082 (void)qd65xx_init();
2083#endif
2084
2085 initializing = 1;
2086 /* Probe for special PCI and other "known" interface chipsets. */
2087 probe_for_hwifs();
2088 initializing = 0;
2089
2090#ifdef CONFIG_PROC_FS
2091 proc_ide_create();
2092#endif
2093 return 0;
2094}
2095
2096#ifdef MODULE
2097static char *options = NULL;
2098module_param(options, charp, 0);
2099MODULE_LICENSE("GPL");
2100
2101static void __init parse_options (char *line)
2102{
2103 char *next = line;
2104
2105 if (line == NULL || !*line)
2106 return;
2107 while ((line = next) != NULL) {
2108 if ((next = strchr(line,' ')) != NULL)
2109 *next++ = 0;
2110 if (!ide_setup(line))
2111 printk (KERN_INFO "Unknown option '%s'\n", line);
2112 }
2113}
2114
fbd8ad30 2115int __init init_module (void)
1da177e4
LT		 2116{
2117 parse_options(options);
2118 return ide_init();
2119}
2120
eb797227 2121void __exit cleanup_module (void)
1da177e4
LT		 2122{
2123 int index;
2124
2125 for (index = 0; index < MAX_HWIFS; ++index)
2126 ide_unregister(index);
2127
6855036a
TH		 2128#ifdef CONFIG_BLK_DEV_IDEPNP
2129 pnpide_exit();
2130#endif
2131
1da177e4
LT		 2132#ifdef CONFIG_PROC_FS
2133 proc_ide_destroy();
2134#endif
1da177e4
LT		 2135
2136 bus_unregister(&ide_bus_type);
2137}
2138
2139#else /* !MODULE */
2140
2141__setup("", ide_setup);
2142
2143module_init(ide_init);
2144
2145#endif /* MODULE */
Linux kernel - Deliverables
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