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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * linux/drivers/ide/ide.c Version 7.00beta2 Mar 05 2003
3 *
4 * Copyright (C) 1994-1998 Linus Torvalds & authors (see below)
5 */
6
7/*
8 * Mostly written by Mark Lord <mlord@pobox.com>
9 * and Gadi Oxman <gadio@netvision.net.il>
10 * and Andre Hedrick <andre@linux-ide.org>
11 *
12 * See linux/MAINTAINERS for address of current maintainer.
13 *
14 * This is the multiple IDE interface driver, as evolved from hd.c.
15 * It supports up to MAX_HWIFS IDE interfaces, on one or more IRQs
16 * (usually 14 & 15).
17 * There can be up to two drives per interface, as per the ATA-2 spec.
18 *
19 * Primary: ide0, port 0x1f0; major=3; hda is minor=0; hdb is minor=64
20 * Secondary: ide1, port 0x170; major=22; hdc is minor=0; hdd is minor=64
21 * Tertiary: ide2, port 0x???; major=33; hde is minor=0; hdf is minor=64
22 * Quaternary: ide3, port 0x???; major=34; hdg is minor=0; hdh is minor=64
23 * ...
24 *
25 * From hd.c:
26 * |
27 * | It traverses the request-list, using interrupts to jump between functions.
28 * | As nearly all functions can be called within interrupts, we may not sleep.
29 * | Special care is recommended. Have Fun!
30 * |
31 * | modified by Drew Eckhardt to check nr of hd's from the CMOS.
32 * |
33 * | Thanks to Branko Lankester, lankeste@fwi.uva.nl, who found a bug
34 * | in the early extended-partition checks and added DM partitions.
35 * |
36 * | Early work on error handling by Mika Liljeberg (liljeber@cs.Helsinki.FI).
37 * |
38 * | IRQ-unmask, drive-id, multiple-mode, support for ">16 heads",
39 * | and general streamlining by Mark Lord (mlord@pobox.com).
40 *
41 * October, 1994 -- Complete line-by-line overhaul for linux 1.1.x, by:
42 *
43 * Mark Lord (mlord@pobox.com) (IDE Perf.Pkg)
44 * Delman Lee (delman@ieee.org) ("Mr. atdisk2")
45 * Scott Snyder (snyder@fnald0.fnal.gov) (ATAPI IDE cd-rom)
46 *
47 * This was a rewrite of just about everything from hd.c, though some original
48 * code is still sprinkled about. Think of it as a major evolution, with
49 * inspiration from lots of linux users, esp. hamish@zot.apana.org.au
50 *
51 * Version 1.0 ALPHA initial code, primary i/f working okay
52 * Version 1.3 BETA dual i/f on shared irq tested & working!
53 * Version 1.4 BETA added auto probing for irq(s)
54 * Version 1.5 BETA added ALPHA (untested) support for IDE cd-roms,
55 * ...
56 * Version 5.50 allow values as small as 20 for idebus=
57 * Version 5.51 force non io_32bit in drive_cmd_intr()
58 * change delay_10ms() to delay_50ms() to fix problems
59 * Version 5.52 fix incorrect invalidation of removable devices
60 * add "hdx=slow" command line option
61 * Version 5.60 start to modularize the driver; the disk and ATAPI
62 * drivers can be compiled as loadable modules.
63 * move IDE probe code to ide-probe.c
64 * move IDE disk code to ide-disk.c
65 * add support for generic IDE device subdrivers
66 * add m68k code from Geert Uytterhoeven
67 * probe all interfaces by default
68 * add ioctl to (re)probe an interface
69 * Version 6.00 use per device request queues
70 * attempt to optimize shared hwgroup performance
71 * add ioctl to manually adjust bandwidth algorithms
72 * add kerneld support for the probe module
73 * fix bug in ide_error()
74 * fix bug in the first ide_get_lock() call for Atari
75 * don't flush leftover data for ATAPI devices
76 * Version 6.01 clear hwgroup->active while the hwgroup sleeps
77 * support HDIO_GETGEO for floppies
78 * Version 6.02 fix ide_ack_intr() call
79 * check partition table on floppies
80 * Version 6.03 handle bad status bit sequencing in ide_wait_stat()
81 * Version 6.10 deleted old entries from this list of updates
82 * replaced triton.c with ide-dma.c generic PCI DMA
83 * added support for BIOS-enabled UltraDMA
84 * rename all "promise" things to "pdc4030"
85 * fix EZ-DRIVE handling on small disks
86 * Version 6.11 fix probe error in ide_scan_devices()
87 * fix ancient "jiffies" polling bugs
88 * mask all hwgroup interrupts on each irq entry
89 * Version 6.12 integrate ioctl and proc interfaces
90 * fix parsing of "idex=" command line parameter
91 * Version 6.13 add support for ide4/ide5 courtesy rjones@orchestream.com
92 * Version 6.14 fixed IRQ sharing among PCI devices
93 * Version 6.15 added SMP awareness to IDE drivers
94 * Version 6.16 fixed various bugs; even more SMP friendly
95 * Version 6.17 fix for newest EZ-Drive problem
96 * Version 6.18 default unpartitioned-disk translation now "BIOS LBA"
97 * Version 6.19 Re-design for a UNIFORM driver for all platforms,
98 * model based on suggestions from Russell King and
99 * Geert Uytterhoeven
100 * Promise DC4030VL now supported.
101 * add support for ide6/ide7
102 * delay_50ms() changed to ide_delay_50ms() and exported.
103 * Version 6.20 Added/Fixed Generic ATA-66 support and hwif detection.
104 * Added hdx=flash to allow for second flash disk
105 * detection w/o the hang loop.
106 * Added support for ide8/ide9
107 * Added idex=ata66 for the quirky chipsets that are
108 * ATA-66 compliant, but have yet to determine a method
109 * of verification of the 80c cable presence.
110 * Specifically Promise's PDC20262 chipset.
111 * Version 6.21 Fixing/Fixed SMP spinlock issue with insight from an old
112 * hat that clarified original low level driver design.
113 * Version 6.30 Added SMP support; fixed multmode issues. -ml
114 * Version 6.31 Debug Share INTR's and request queue streaming
115 * Native ATA-100 support
116 * Prep for Cascades Project
117 * Version 7.00alpha First named revision of ide rearrange
118 *
119 * Some additional driver compile-time options are in ./include/linux/ide.h
120 *
121 * To do, in likely order of completion:
122 * - modify kernel to obtain BIOS geometry for drives on 2nd/3rd/4th i/f
123 *
124 */
125
126#define REVISION "Revision: 7.00alpha2"
127#define VERSION "Id: ide.c 7.00a2 20020906"
128
129#undef REALLY_SLOW_IO /* most systems can safely undef this */
130
131#define _IDE_C /* Tell ide.h it's really us */
132
Linus Torvalds1da177e2005-04-16 15:20:36 -0700133#include <linux/module.h>
134#include <linux/types.h>
135#include <linux/string.h>
136#include <linux/kernel.h>
137#include <linux/timer.h>
138#include <linux/mm.h>
139#include <linux/interrupt.h>
140#include <linux/major.h>
141#include <linux/errno.h>
142#include <linux/genhd.h>
143#include <linux/blkpg.h>
144#include <linux/slab.h>
145#include <linux/init.h>
146#include <linux/pci.h>
147#include <linux/delay.h>
148#include <linux/ide.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -0700149#include <linux/completion.h>
150#include <linux/reboot.h>
151#include <linux/cdrom.h>
152#include <linux/seq_file.h>
153#include <linux/device.h>
154#include <linux/bitops.h>
155
156#include <asm/byteorder.h>
157#include <asm/irq.h>
158#include <asm/uaccess.h>
159#include <asm/io.h>
160
161
162/* default maximum number of failures */
163#define IDE_DEFAULT_MAX_FAILURES 1
164
165static const u8 ide_hwif_to_major[] = { IDE0_MAJOR, IDE1_MAJOR,
166 IDE2_MAJOR, IDE3_MAJOR,
167 IDE4_MAJOR, IDE5_MAJOR,
168 IDE6_MAJOR, IDE7_MAJOR,
169 IDE8_MAJOR, IDE9_MAJOR };
170
171static int idebus_parameter; /* holds the "idebus=" parameter */
172static int system_bus_speed; /* holds what we think is VESA/PCI bus speed */
173static int initializing; /* set while initializing built-in drivers */
174
175DECLARE_MUTEX(ide_cfg_sem);
176 __cacheline_aligned_in_smp DEFINE_SPINLOCK(ide_lock);
177
178#ifdef CONFIG_BLK_DEV_IDEPCI
179static int ide_scan_direction; /* THIS was formerly 2.2.x pci=reverse */
180#endif
181
182#ifdef CONFIG_IDEDMA_AUTO
183int noautodma = 0;
184#else
185int noautodma = 1;
186#endif
187
188EXPORT_SYMBOL(noautodma);
189
Hannes Reineckee3a59b42007-02-07 18:19:37 +0100190#ifdef CONFIG_BLK_DEV_IDEACPI
191int ide_noacpi = 0;
192int ide_noacpitfs = 1;
193int ide_noacpionboot = 1;
194#endif
195
Linus Torvalds1da177e2005-04-16 15:20:36 -0700196/*
197 * This is declared extern in ide.h, for access by other IDE modules:
198 */
199ide_hwif_t ide_hwifs[MAX_HWIFS]; /* master data repository */
200
201EXPORT_SYMBOL(ide_hwifs);
202
Linus Torvalds1da177e2005-04-16 15:20:36 -0700203/*
204 * Do not even *think* about calling this!
205 */
206static void init_hwif_data(ide_hwif_t *hwif, unsigned int index)
207{
208 unsigned int unit;
209
210 /* bulk initialize hwif & drive info with zeros */
211 memset(hwif, 0, sizeof(ide_hwif_t));
212
213 /* fill in any non-zero initial values */
214 hwif->index = index;
215 hwif->major = ide_hwif_to_major[index];
216
217 hwif->name[0] = 'i';
218 hwif->name[1] = 'd';
219 hwif->name[2] = 'e';
220 hwif->name[3] = '0' + index;
221
222 hwif->bus_state = BUSSTATE_ON;
223
224 hwif->atapi_dma = 0; /* disable all atapi dma */
225 hwif->ultra_mask = 0x80; /* disable all ultra */
226 hwif->mwdma_mask = 0x80; /* disable all mwdma */
227 hwif->swdma_mask = 0x80; /* disable all swdma */
228
Aleksey Makarovf36d4022006-01-09 15:59:27 -0800229 init_completion(&hwif->gendev_rel_comp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700230
231 default_hwif_iops(hwif);
232 default_hwif_transport(hwif);
233 for (unit = 0; unit < MAX_DRIVES; ++unit) {
234 ide_drive_t *drive = &hwif->drives[unit];
235
236 drive->media = ide_disk;
237 drive->select.all = (unit<<4)|0xa0;
238 drive->hwif = hwif;
239 drive->ctl = 0x08;
240 drive->ready_stat = READY_STAT;
241 drive->bad_wstat = BAD_W_STAT;
242 drive->special.b.recalibrate = 1;
243 drive->special.b.set_geometry = 1;
244 drive->name[0] = 'h';
245 drive->name[1] = 'd';
246 drive->name[2] = 'a' + (index * MAX_DRIVES) + unit;
247 drive->max_failures = IDE_DEFAULT_MAX_FAILURES;
248 drive->using_dma = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700249 drive->vdma = 0;
250 INIT_LIST_HEAD(&drive->list);
Aleksey Makarovf36d4022006-01-09 15:59:27 -0800251 init_completion(&drive->gendev_rel_comp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700252 }
253}
254
255static void init_hwif_default(ide_hwif_t *hwif, unsigned int index)
256{
257 hw_regs_t hw;
258
259 memset(&hw, 0, sizeof(hw_regs_t));
260
261 ide_init_hwif_ports(&hw, ide_default_io_base(index), 0, &hwif->irq);
262
263 memcpy(&hwif->hw, &hw, sizeof(hw));
264 memcpy(hwif->io_ports, hw.io_ports, sizeof(hw.io_ports));
265
266 hwif->noprobe = !hwif->io_ports[IDE_DATA_OFFSET];
267#ifdef CONFIG_BLK_DEV_HD
268 if (hwif->io_ports[IDE_DATA_OFFSET] == HD_DATA)
269 hwif->noprobe = 1; /* may be overridden by ide_setup() */
270#endif
271}
272
273extern void ide_arm_init(void);
274
275/*
276 * init_ide_data() sets reasonable default values into all fields
277 * of all instances of the hwifs and drives, but only on the first call.
278 * Subsequent calls have no effect (they don't wipe out anything).
279 *
280 * This routine is normally called at driver initialization time,
281 * but may also be called MUCH earlier during kernel "command-line"
282 * parameter processing. As such, we cannot depend on any other parts
283 * of the kernel (such as memory allocation) to be functioning yet.
284 *
285 * This is too bad, as otherwise we could dynamically allocate the
286 * ide_drive_t structs as needed, rather than always consuming memory
287 * for the max possible number (MAX_HWIFS * MAX_DRIVES) of them.
288 *
289 * FIXME: We should stuff the setup data into __init and copy the
290 * relevant hwifs/allocate them properly during boot.
291 */
292#define MAGIC_COOKIE 0x12345678
293static void __init init_ide_data (void)
294{
295 ide_hwif_t *hwif;
296 unsigned int index;
297 static unsigned long magic_cookie = MAGIC_COOKIE;
298
299 if (magic_cookie != MAGIC_COOKIE)
300 return; /* already initialized */
301 magic_cookie = 0;
302
303 /* Initialise all interface structures */
304 for (index = 0; index < MAX_HWIFS; ++index) {
305 hwif = &ide_hwifs[index];
306 init_hwif_data(hwif, index);
307 init_hwif_default(hwif, index);
308#if !defined(CONFIG_PPC32) || !defined(CONFIG_PCI)
309 hwif->irq = hwif->hw.irq =
310 ide_init_default_irq(hwif->io_ports[IDE_DATA_OFFSET]);
311#endif
312 }
313#ifdef CONFIG_IDE_ARM
314 initializing = 1;
315 ide_arm_init();
316 initializing = 0;
317#endif
318}
319
320/**
321 * ide_system_bus_speed - guess bus speed
322 *
323 * ide_system_bus_speed() returns what we think is the system VESA/PCI
324 * bus speed (in MHz). This is used for calculating interface PIO timings.
325 * The default is 40 for known PCI systems, 50 otherwise.
326 * The "idebus=xx" parameter can be used to override this value.
327 * The actual value to be used is computed/displayed the first time
328 * through. Drivers should only use this as a last resort.
329 *
330 * Returns a guessed speed in MHz.
331 */
332
333static int ide_system_bus_speed(void)
334{
335#ifdef CONFIG_PCI
336 static struct pci_device_id pci_default[] = {
337 { PCI_DEVICE(PCI_ANY_ID, PCI_ANY_ID) },
338 { }
339 };
340#else
341#define pci_default 0
342#endif /* CONFIG_PCI */
343
344 if (!system_bus_speed) {
345 if (idebus_parameter) {
346 /* user supplied value */
347 system_bus_speed = idebus_parameter;
348 } else if (pci_dev_present(pci_default)) {
349 /* safe default value for PCI */
350 system_bus_speed = 33;
351 } else {
352 /* safe default value for VESA and PCI */
353 system_bus_speed = 50;
354 }
355 printk(KERN_INFO "ide: Assuming %dMHz system bus speed "
356 "for PIO modes%s\n", system_bus_speed,
357 idebus_parameter ? "" : "; override with idebus=xx");
358 }
359 return system_bus_speed;
360}
361
Linus Torvalds1da177e2005-04-16 15:20:36 -0700362#ifdef CONFIG_PROC_FS
363struct proc_dir_entry *proc_ide_root;
364#endif
365
366static struct resource* hwif_request_region(ide_hwif_t *hwif,
367 unsigned long addr, int num)
368{
369 struct resource *res = request_region(addr, num, hwif->name);
370
371 if (!res)
372 printk(KERN_ERR "%s: I/O resource 0x%lX-0x%lX not free.\n",
373 hwif->name, addr, addr+num-1);
374 return res;
375}
376
377/**
378 * ide_hwif_request_regions - request resources for IDE
379 * @hwif: interface to use
380 *
381 * Requests all the needed resources for an interface.
382 * Right now core IDE code does this work which is deeply wrong.
383 * MMIO leaves it to the controller driver,
384 * PIO will migrate this way over time.
385 */
386
387int ide_hwif_request_regions(ide_hwif_t *hwif)
388{
389 unsigned long addr;
390 unsigned int i;
391
392 if (hwif->mmio == 2)
393 return 0;
394 BUG_ON(hwif->mmio == 1);
395 addr = hwif->io_ports[IDE_CONTROL_OFFSET];
396 if (addr && !hwif_request_region(hwif, addr, 1))
397 goto control_region_busy;
398 hwif->straight8 = 0;
399 addr = hwif->io_ports[IDE_DATA_OFFSET];
400 if ((addr | 7) == hwif->io_ports[IDE_STATUS_OFFSET]) {
401 if (!hwif_request_region(hwif, addr, 8))
402 goto data_region_busy;
403 hwif->straight8 = 1;
404 return 0;
405 }
406 for (i = IDE_DATA_OFFSET; i <= IDE_STATUS_OFFSET; i++) {
407 addr = hwif->io_ports[i];
408 if (!hwif_request_region(hwif, addr, 1)) {
409 while (--i)
410 release_region(addr, 1);
411 goto data_region_busy;
412 }
413 }
414 return 0;
415
416data_region_busy:
417 addr = hwif->io_ports[IDE_CONTROL_OFFSET];
418 if (addr)
419 release_region(addr, 1);
420control_region_busy:
421 /* If any errors are return, we drop the hwif interface. */
422 return -EBUSY;
423}
424
425/**
426 * ide_hwif_release_regions - free IDE resources
427 *
428 * Note that we only release the standard ports,
429 * and do not even try to handle any extra ports
430 * allocated for weird IDE interface chipsets.
431 *
432 * Note also that we don't yet handle mmio resources here. More
433 * importantly our caller should be doing this so we need to
434 * restructure this as a helper function for drivers.
435 */
436
437void ide_hwif_release_regions(ide_hwif_t *hwif)
438{
439 u32 i = 0;
440
441 if (hwif->mmio == 2)
442 return;
443 if (hwif->io_ports[IDE_CONTROL_OFFSET])
444 release_region(hwif->io_ports[IDE_CONTROL_OFFSET], 1);
445 if (hwif->straight8) {
446 release_region(hwif->io_ports[IDE_DATA_OFFSET], 8);
447 return;
448 }
449 for (i = IDE_DATA_OFFSET; i <= IDE_STATUS_OFFSET; i++)
450 if (hwif->io_ports[i])
451 release_region(hwif->io_ports[i], 1);
452}
453
454/**
455 * ide_hwif_restore - restore hwif to template
456 * @hwif: hwif to update
457 * @tmp_hwif: template
458 *
Sergei Shtylylov020e3222006-10-03 01:14:13 -0700459 * Restore hwif to a previous state by copying most settings
Linus Torvalds1da177e2005-04-16 15:20:36 -0700460 * from the template.
461 */
462
463static void ide_hwif_restore(ide_hwif_t *hwif, ide_hwif_t *tmp_hwif)
464{
465 hwif->hwgroup = tmp_hwif->hwgroup;
466
467 hwif->gendev.parent = tmp_hwif->gendev.parent;
468
469 hwif->proc = tmp_hwif->proc;
470
471 hwif->major = tmp_hwif->major;
472 hwif->straight8 = tmp_hwif->straight8;
473 hwif->bus_state = tmp_hwif->bus_state;
474
475 hwif->atapi_dma = tmp_hwif->atapi_dma;
476 hwif->ultra_mask = tmp_hwif->ultra_mask;
477 hwif->mwdma_mask = tmp_hwif->mwdma_mask;
478 hwif->swdma_mask = tmp_hwif->swdma_mask;
479
480 hwif->chipset = tmp_hwif->chipset;
481 hwif->hold = tmp_hwif->hold;
482
483#ifdef CONFIG_BLK_DEV_IDEPCI
484 hwif->pci_dev = tmp_hwif->pci_dev;
485 hwif->cds = tmp_hwif->cds;
486#endif
487
488 hwif->tuneproc = tmp_hwif->tuneproc;
489 hwif->speedproc = tmp_hwif->speedproc;
490 hwif->selectproc = tmp_hwif->selectproc;
491 hwif->reset_poll = tmp_hwif->reset_poll;
492 hwif->pre_reset = tmp_hwif->pre_reset;
493 hwif->resetproc = tmp_hwif->resetproc;
494 hwif->intrproc = tmp_hwif->intrproc;
495 hwif->maskproc = tmp_hwif->maskproc;
496 hwif->quirkproc = tmp_hwif->quirkproc;
497 hwif->busproc = tmp_hwif->busproc;
498
499 hwif->ata_input_data = tmp_hwif->ata_input_data;
500 hwif->ata_output_data = tmp_hwif->ata_output_data;
501 hwif->atapi_input_bytes = tmp_hwif->atapi_input_bytes;
502 hwif->atapi_output_bytes = tmp_hwif->atapi_output_bytes;
503
504 hwif->dma_setup = tmp_hwif->dma_setup;
505 hwif->dma_exec_cmd = tmp_hwif->dma_exec_cmd;
506 hwif->dma_start = tmp_hwif->dma_start;
507 hwif->ide_dma_end = tmp_hwif->ide_dma_end;
508 hwif->ide_dma_check = tmp_hwif->ide_dma_check;
509 hwif->ide_dma_on = tmp_hwif->ide_dma_on;
510 hwif->ide_dma_off_quietly = tmp_hwif->ide_dma_off_quietly;
511 hwif->ide_dma_test_irq = tmp_hwif->ide_dma_test_irq;
512 hwif->ide_dma_host_on = tmp_hwif->ide_dma_host_on;
513 hwif->ide_dma_host_off = tmp_hwif->ide_dma_host_off;
514 hwif->ide_dma_lostirq = tmp_hwif->ide_dma_lostirq;
515 hwif->ide_dma_timeout = tmp_hwif->ide_dma_timeout;
516
517 hwif->OUTB = tmp_hwif->OUTB;
518 hwif->OUTBSYNC = tmp_hwif->OUTBSYNC;
519 hwif->OUTW = tmp_hwif->OUTW;
520 hwif->OUTL = tmp_hwif->OUTL;
521 hwif->OUTSW = tmp_hwif->OUTSW;
522 hwif->OUTSL = tmp_hwif->OUTSL;
523
524 hwif->INB = tmp_hwif->INB;
525 hwif->INW = tmp_hwif->INW;
526 hwif->INL = tmp_hwif->INL;
527 hwif->INSW = tmp_hwif->INSW;
528 hwif->INSL = tmp_hwif->INSL;
529
530 hwif->sg_max_nents = tmp_hwif->sg_max_nents;
531
532 hwif->mmio = tmp_hwif->mmio;
533 hwif->rqsize = tmp_hwif->rqsize;
534 hwif->no_lba48 = tmp_hwif->no_lba48;
535
536#ifndef CONFIG_BLK_DEV_IDECS
537 hwif->irq = tmp_hwif->irq;
538#endif
539
540 hwif->dma_base = tmp_hwif->dma_base;
541 hwif->dma_master = tmp_hwif->dma_master;
542 hwif->dma_command = tmp_hwif->dma_command;
543 hwif->dma_vendor1 = tmp_hwif->dma_vendor1;
544 hwif->dma_status = tmp_hwif->dma_status;
545 hwif->dma_vendor3 = tmp_hwif->dma_vendor3;
546 hwif->dma_prdtable = tmp_hwif->dma_prdtable;
547
Linus Torvalds1da177e2005-04-16 15:20:36 -0700548 hwif->config_data = tmp_hwif->config_data;
549 hwif->select_data = tmp_hwif->select_data;
Sergei Shtylylov020e3222006-10-03 01:14:13 -0700550 hwif->extra_base = tmp_hwif->extra_base;
551 hwif->extra_ports = tmp_hwif->extra_ports;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700552 hwif->autodma = tmp_hwif->autodma;
553 hwif->udma_four = tmp_hwif->udma_four;
554 hwif->no_dsc = tmp_hwif->no_dsc;
555
556 hwif->hwif_data = tmp_hwif->hwif_data;
557}
558
559/**
Sergei Shtylylov020e3222006-10-03 01:14:13 -0700560 * ide_unregister - free an IDE interface
Linus Torvalds1da177e2005-04-16 15:20:36 -0700561 * @index: index of interface (will change soon to a pointer)
562 *
563 * Perform the final unregister of an IDE interface. At the moment
564 * we don't refcount interfaces so this will also get split up.
565 *
566 * Locking:
567 * The caller must not hold the IDE locks
568 * The drive present/vanishing is not yet properly locked
569 * Take care with the callbacks. These have been split to avoid
570 * deadlocking the IDE layer. The shutdown callback is called
571 * before we take the lock and free resources. It is up to the
572 * caller to be sure there is no pending I/O here, and that
Sergei Shtylylov020e3222006-10-03 01:14:13 -0700573 * the interface will not be reopened (present/vanishing locking
574 * isn't yet done BTW). After we commit to the final kill we
Linus Torvalds1da177e2005-04-16 15:20:36 -0700575 * call the cleanup callback with the ide locks held.
576 *
577 * Unregister restores the hwif structures to the default state.
578 * This is raving bonkers.
579 */
580
581void ide_unregister(unsigned int index)
582{
583 ide_drive_t *drive;
584 ide_hwif_t *hwif, *g;
585 static ide_hwif_t tmp_hwif; /* protected by ide_cfg_sem */
586 ide_hwgroup_t *hwgroup;
Bartlomiej Zolnierkiewicz8604aff2005-05-26 14:55:34 +0200587 int irq_count = 0, unit;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700588
589 BUG_ON(index >= MAX_HWIFS);
590
591 BUG_ON(in_interrupt());
592 BUG_ON(irqs_disabled());
593 down(&ide_cfg_sem);
594 spin_lock_irq(&ide_lock);
595 hwif = &ide_hwifs[index];
596 if (!hwif->present)
597 goto abort;
598 for (unit = 0; unit < MAX_DRIVES; ++unit) {
599 drive = &hwif->drives[unit];
Greg Kroah-Hartman94f6c592005-06-20 21:15:16 -0700600 if (!drive->present)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700601 continue;
Bartlomiej Zolnierkiewicz8604aff2005-05-26 14:55:34 +0200602 spin_unlock_irq(&ide_lock);
603 device_unregister(&drive->gendev);
Aleksey Makarovf36d4022006-01-09 15:59:27 -0800604 wait_for_completion(&drive->gendev_rel_comp);
Bartlomiej Zolnierkiewicz8604aff2005-05-26 14:55:34 +0200605 spin_lock_irq(&ide_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700606 }
607 hwif->present = 0;
608
609 spin_unlock_irq(&ide_lock);
610
Linus Torvalds1da177e2005-04-16 15:20:36 -0700611 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 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700638 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);
Aleksey Makarovf36d4022006-01-09 15:59:27 -0800664 wait_for_completion(&hwif->gendev_rel_comp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700665
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;
Sergei Shtylylov020e3222006-10-03 01:14:13 -0700684
685 hwif->extra_base = 0;
686 hwif->extra_ports = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700687 }
688
689 /* copy original settings */
690 tmp_hwif = *hwif;
691
692 /* restore hwif data to pristine status */
693 init_hwif_data(hwif, index);
694 init_hwif_default(hwif, index);
695
696 ide_hwif_restore(hwif, &tmp_hwif);
697
698abort:
699 spin_unlock_irq(&ide_lock);
700 up(&ide_cfg_sem);
701}
702
703EXPORT_SYMBOL(ide_unregister);
704
705
706/**
707 * ide_setup_ports - set up IDE interface ports
708 * @hw: register descriptions
709 * @base: base register
710 * @offsets: table of register offsets
711 * @ctrl: control register
712 * @ack_irq: IRQ ack
713 * @irq: interrupt lie
714 *
715 * Setup hw_regs_t structure described by parameters. You
716 * may set up the hw structure yourself OR use this routine to
717 * do it for you. This is basically a helper
718 *
719 */
720
721void ide_setup_ports ( hw_regs_t *hw,
722 unsigned long base, int *offsets,
723 unsigned long ctrl, unsigned long intr,
724 ide_ack_intr_t *ack_intr,
725/*
726 * ide_io_ops_t *iops,
727 */
728 int irq)
729{
730 int i;
731
Roman Zippel2c3e0262006-06-23 02:04:51 -0700732 memset(hw, 0, sizeof(hw_regs_t));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700733 for (i = 0; i < IDE_NR_PORTS; i++) {
734 if (offsets[i] == -1) {
735 switch(i) {
736 case IDE_CONTROL_OFFSET:
737 hw->io_ports[i] = ctrl;
738 break;
739#if defined(CONFIG_AMIGA) || defined(CONFIG_MAC)
740 case IDE_IRQ_OFFSET:
741 hw->io_ports[i] = intr;
742 break;
743#endif /* (CONFIG_AMIGA) || (CONFIG_MAC) */
744 default:
745 hw->io_ports[i] = 0;
746 break;
747 }
748 } else {
749 hw->io_ports[i] = base + offsets[i];
750 }
751 }
752 hw->irq = irq;
753 hw->dma = NO_DMA;
754 hw->ack_intr = ack_intr;
755/*
756 * hw->iops = iops;
757 */
758}
759
760/**
761 * ide_register_hw_with_fixup - register IDE interface
762 * @hw: hardware registers
763 * @hwifp: pointer to returned hwif
764 * @fixup: fixup function
765 *
766 * Register an IDE interface, specifying exactly the registers etc.
767 * Set init=1 iff calling before probes have taken place.
768 *
769 * Returns -1 on error.
770 */
771
772int ide_register_hw_with_fixup(hw_regs_t *hw, ide_hwif_t **hwifp, void(*fixup)(ide_hwif_t *hwif))
773{
774 int index, retry = 1;
775 ide_hwif_t *hwif;
776
777 do {
778 for (index = 0; index < MAX_HWIFS; ++index) {
779 hwif = &ide_hwifs[index];
780 if (hwif->hw.io_ports[IDE_DATA_OFFSET] == hw->io_ports[IDE_DATA_OFFSET])
781 goto found;
782 }
783 for (index = 0; index < MAX_HWIFS; ++index) {
784 hwif = &ide_hwifs[index];
785 if (hwif->hold)
786 continue;
787 if ((!hwif->present && !hwif->mate && !initializing) ||
788 (!hwif->hw.io_ports[IDE_DATA_OFFSET] && initializing))
789 goto found;
790 }
791 for (index = 0; index < MAX_HWIFS; index++)
792 ide_unregister(index);
793 } while (retry--);
794 return -1;
795found:
796 if (hwif->present)
797 ide_unregister(index);
798 else if (!hwif->hold) {
799 init_hwif_data(hwif, index);
800 init_hwif_default(hwif, index);
801 }
802 if (hwif->present)
803 return -1;
804 memcpy(&hwif->hw, hw, sizeof(*hw));
805 memcpy(hwif->io_ports, hwif->hw.io_ports, sizeof(hwif->hw.io_ports));
806 hwif->irq = hw->irq;
807 hwif->noprobe = 0;
808 hwif->chipset = hw->chipset;
Hannes Reinecke4349d5c2005-11-09 22:47:18 +0100809 hwif->gendev.parent = hw->dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700810
811 if (!initializing) {
812 probe_hwif_init_with_fixup(hwif, fixup);
813 create_proc_ide_interfaces();
814 }
815
816 if (hwifp)
817 *hwifp = hwif;
818
819 return (initializing || hwif->present) ? index : -1;
820}
821
822EXPORT_SYMBOL(ide_register_hw_with_fixup);
823
824int ide_register_hw(hw_regs_t *hw, ide_hwif_t **hwifp)
825{
826 return ide_register_hw_with_fixup(hw, hwifp, NULL);
827}
828
829EXPORT_SYMBOL(ide_register_hw);
830
831/*
832 * Locks for IDE setting functionality
833 */
834
835DECLARE_MUTEX(ide_setting_sem);
836
837/**
838 * __ide_add_setting - add an ide setting option
839 * @drive: drive to use
840 * @name: setting name
841 * @rw: true if the function is read write
842 * @read_ioctl: function to call on read
843 * @write_ioctl: function to call on write
844 * @data_type: type of data
845 * @min: range minimum
846 * @max: range maximum
847 * @mul_factor: multiplication scale
848 * @div_factor: divison scale
849 * @data: private data field
850 * @set: setting
851 * @auto_remove: setting auto removal flag
852 *
853 * Removes the setting named from the device if it is present.
854 * The function takes the settings_lock to protect against
855 * parallel changes. This function must not be called from IRQ
856 * context. Returns 0 on success or -1 on failure.
857 *
858 * BUGS: This code is seriously over-engineered. There is also
859 * magic about how the driver specific features are setup. If
860 * a driver is attached we assume the driver settings are auto
861 * remove.
862 */
863
864static 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)
865{
866 ide_settings_t **p = (ide_settings_t **) &drive->settings, *setting = NULL;
867
868 down(&ide_setting_sem);
869 while ((*p) && strcmp((*p)->name, name) < 0)
870 p = &((*p)->next);
Deepak Saxenaf5e3c2f2005-11-07 01:01:25 -0800871 if ((setting = kzalloc(sizeof(*setting), GFP_KERNEL)) == NULL)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700872 goto abort;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700873 if ((setting->name = kmalloc(strlen(name) + 1, GFP_KERNEL)) == NULL)
874 goto abort;
875 strcpy(setting->name, name);
876 setting->rw = rw;
877 setting->read_ioctl = read_ioctl;
878 setting->write_ioctl = write_ioctl;
879 setting->data_type = data_type;
880 setting->min = min;
881 setting->max = max;
882 setting->mul_factor = mul_factor;
883 setting->div_factor = div_factor;
884 setting->data = data;
885 setting->set = set;
886
887 setting->next = *p;
888 if (auto_remove)
889 setting->auto_remove = 1;
890 *p = setting;
891 up(&ide_setting_sem);
892 return 0;
893abort:
894 up(&ide_setting_sem);
Jesper Juhl6044ec82005-11-07 01:01:32 -0800895 kfree(setting);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700896 return -1;
897}
898
899int 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)
900{
901 return __ide_add_setting(drive, name, rw, read_ioctl, write_ioctl, data_type, min, max, mul_factor, div_factor, data, set, 1);
902}
903
904EXPORT_SYMBOL(ide_add_setting);
905
906/**
907 * __ide_remove_setting - remove an ide setting option
908 * @drive: drive to use
909 * @name: setting name
910 *
911 * Removes the setting named from the device if it is present.
912 * The caller must hold the setting semaphore.
913 */
914
915static void __ide_remove_setting (ide_drive_t *drive, char *name)
916{
917 ide_settings_t **p, *setting;
918
919 p = (ide_settings_t **) &drive->settings;
920
921 while ((*p) && strcmp((*p)->name, name))
922 p = &((*p)->next);
923 if ((setting = (*p)) == NULL)
924 return;
925
926 (*p) = setting->next;
927
928 kfree(setting->name);
929 kfree(setting);
930}
931
932/**
933 * ide_find_setting_by_ioctl - find a drive specific ioctl
934 * @drive: drive to scan
935 * @cmd: ioctl command to handle
936 *
937 * Scan's the device setting table for a matching entry and returns
938 * this or NULL if no entry is found. The caller must hold the
939 * setting semaphore
940 */
941
942static ide_settings_t *ide_find_setting_by_ioctl (ide_drive_t *drive, int cmd)
943{
944 ide_settings_t *setting = drive->settings;
945
946 while (setting) {
947 if (setting->read_ioctl == cmd || setting->write_ioctl == cmd)
948 break;
949 setting = setting->next;
950 }
951
952 return setting;
953}
954
955/**
956 * ide_find_setting_by_name - find a drive specific setting
957 * @drive: drive to scan
958 * @name: setting name
959 *
960 * Scan's the device setting table for a matching entry and returns
961 * this or NULL if no entry is found. The caller must hold the
962 * setting semaphore
963 */
964
965ide_settings_t *ide_find_setting_by_name (ide_drive_t *drive, char *name)
966{
967 ide_settings_t *setting = drive->settings;
968
969 while (setting) {
970 if (strcmp(setting->name, name) == 0)
971 break;
972 setting = setting->next;
973 }
974 return setting;
975}
976
977/**
978 * auto_remove_settings - remove driver specific settings
979 * @drive: drive
980 *
981 * Automatically remove all the driver specific settings for this
Peter Zijlstra9a2239b2006-12-06 20:36:13 -0800982 * drive. This function may not be called from IRQ context. The
983 * caller must hold ide_setting_sem.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700984 */
985
986static void auto_remove_settings (ide_drive_t *drive)
987{
988 ide_settings_t *setting;
989repeat:
990 setting = drive->settings;
991 while (setting) {
992 if (setting->auto_remove) {
993 __ide_remove_setting(drive, setting->name);
994 goto repeat;
995 }
996 setting = setting->next;
997 }
998}
999
1000/**
1001 * ide_read_setting - read an IDE setting
1002 * @drive: drive to read from
1003 * @setting: drive setting
1004 *
1005 * Read a drive setting and return the value. The caller
1006 * must hold the ide_setting_sem when making this call.
1007 *
1008 * BUGS: the data return and error are the same return value
1009 * so an error -EINVAL and true return of the same value cannot
1010 * be told apart
1011 */
1012
1013int ide_read_setting (ide_drive_t *drive, ide_settings_t *setting)
1014{
1015 int val = -EINVAL;
1016 unsigned long flags;
1017
1018 if ((setting->rw & SETTING_READ)) {
1019 spin_lock_irqsave(&ide_lock, flags);
1020 switch(setting->data_type) {
1021 case TYPE_BYTE:
1022 val = *((u8 *) setting->data);
1023 break;
1024 case TYPE_SHORT:
1025 val = *((u16 *) setting->data);
1026 break;
1027 case TYPE_INT:
1028 case TYPE_INTA:
1029 val = *((u32 *) setting->data);
1030 break;
1031 }
1032 spin_unlock_irqrestore(&ide_lock, flags);
1033 }
1034 return val;
1035}
1036
1037/**
1038 * ide_spin_wait_hwgroup - wait for group
1039 * @drive: drive in the group
1040 *
1041 * Wait for an IDE device group to go non busy and then return
1042 * holding the ide_lock which guards the hwgroup->busy status
1043 * and right to use it.
1044 */
1045
1046int ide_spin_wait_hwgroup (ide_drive_t *drive)
1047{
1048 ide_hwgroup_t *hwgroup = HWGROUP(drive);
1049 unsigned long timeout = jiffies + (3 * HZ);
1050
1051 spin_lock_irq(&ide_lock);
1052
1053 while (hwgroup->busy) {
1054 unsigned long lflags;
1055 spin_unlock_irq(&ide_lock);
1056 local_irq_set(lflags);
1057 if (time_after(jiffies, timeout)) {
1058 local_irq_restore(lflags);
1059 printk(KERN_ERR "%s: channel busy\n", drive->name);
1060 return -EBUSY;
1061 }
1062 local_irq_restore(lflags);
1063 spin_lock_irq(&ide_lock);
1064 }
1065 return 0;
1066}
1067
1068EXPORT_SYMBOL(ide_spin_wait_hwgroup);
1069
1070/**
1071 * ide_write_setting - read an IDE setting
1072 * @drive: drive to read from
1073 * @setting: drive setting
1074 * @val: value
1075 *
1076 * Write a drive setting if it is possible. The caller
1077 * must hold the ide_setting_sem when making this call.
1078 *
1079 * BUGS: the data return and error are the same return value
1080 * so an error -EINVAL and true return of the same value cannot
1081 * be told apart
1082 *
1083 * FIXME: This should be changed to enqueue a special request
1084 * to the driver to change settings, and then wait on a sema for completion.
1085 * The current scheme of polling is kludgy, though safe enough.
1086 */
1087
1088int ide_write_setting (ide_drive_t *drive, ide_settings_t *setting, int val)
1089{
1090 int i;
1091 u32 *p;
1092
1093 if (!capable(CAP_SYS_ADMIN))
1094 return -EACCES;
1095 if (!(setting->rw & SETTING_WRITE))
1096 return -EPERM;
1097 if (val < setting->min || val > setting->max)
1098 return -EINVAL;
1099 if (setting->set)
1100 return setting->set(drive, val);
1101 if (ide_spin_wait_hwgroup(drive))
1102 return -EBUSY;
1103 switch (setting->data_type) {
1104 case TYPE_BYTE:
1105 *((u8 *) setting->data) = val;
1106 break;
1107 case TYPE_SHORT:
1108 *((u16 *) setting->data) = val;
1109 break;
1110 case TYPE_INT:
1111 *((u32 *) setting->data) = val;
1112 break;
1113 case TYPE_INTA:
1114 p = (u32 *) setting->data;
1115 for (i = 0; i < 1 << PARTN_BITS; i++, p++)
1116 *p = val;
1117 break;
1118 }
1119 spin_unlock_irq(&ide_lock);
1120 return 0;
1121}
1122
1123static int set_io_32bit(ide_drive_t *drive, int arg)
1124{
1125 drive->io_32bit = arg;
1126#ifdef CONFIG_BLK_DEV_DTC2278
1127 if (HWIF(drive)->chipset == ide_dtc2278)
1128 HWIF(drive)->drives[!drive->select.b.unit].io_32bit = arg;
1129#endif /* CONFIG_BLK_DEV_DTC2278 */
1130 return 0;
1131}
1132
1133static int set_using_dma (ide_drive_t *drive, int arg)
1134{
1135#ifdef CONFIG_BLK_DEV_IDEDMA
1136 if (!drive->id || !(drive->id->capability & 1))
1137 return -EPERM;
1138 if (HWIF(drive)->ide_dma_check == NULL)
1139 return -EPERM;
1140 if (arg) {
1141 if (HWIF(drive)->ide_dma_check(drive)) return -EIO;
1142 if (HWIF(drive)->ide_dma_on(drive)) return -EIO;
1143 } else {
1144 if (__ide_dma_off(drive))
1145 return -EIO;
1146 }
1147 return 0;
1148#else
1149 return -EPERM;
1150#endif
1151}
1152
1153static int set_pio_mode (ide_drive_t *drive, int arg)
1154{
1155 struct request rq;
1156
1157 if (!HWIF(drive)->tuneproc)
1158 return -ENOSYS;
1159 if (drive->special.b.set_tune)
1160 return -EBUSY;
1161 ide_init_drive_cmd(&rq);
1162 drive->tune_req = (u8) arg;
1163 drive->special.b.set_tune = 1;
1164 (void) ide_do_drive_cmd(drive, &rq, ide_wait);
1165 return 0;
1166}
1167
1168static int set_xfer_rate (ide_drive_t *drive, int arg)
1169{
1170 int err = ide_wait_cmd(drive,
1171 WIN_SETFEATURES, (u8) arg,
1172 SETFEATURES_XFER, 0, NULL);
1173
1174 if (!err && arg) {
1175 ide_set_xfer_rate(drive, (u8) arg);
1176 ide_driveid_update(drive);
1177 }
1178 return err;
1179}
1180
1181/**
1182 * ide_add_generic_settings - generic ide settings
1183 * @drive: drive being configured
1184 *
1185 * Add the generic parts of the system settings to the /proc files and
1186 * ioctls for this IDE device. The caller must not be holding the
1187 * ide_setting_sem.
1188 */
1189
1190void ide_add_generic_settings (ide_drive_t *drive)
1191{
1192/*
1193 * drive setting name read/write access read ioctl write ioctl data type min max mul_factor div_factor data pointer set function
1194 */
1195 __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);
1196 __ide_add_setting(drive, "keepsettings", SETTING_RW, HDIO_GET_KEEPSETTINGS, HDIO_SET_KEEPSETTINGS, TYPE_BYTE, 0, 1, 1, 1, &drive->keep_settings, NULL, 0);
1197 __ide_add_setting(drive, "nice1", SETTING_RW, -1, -1, TYPE_BYTE, 0, 1, 1, 1, &drive->nice1, NULL, 0);
1198 __ide_add_setting(drive, "pio_mode", SETTING_WRITE, -1, HDIO_SET_PIO_MODE, TYPE_BYTE, 0, 255, 1, 1, NULL, set_pio_mode, 0);
1199 __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);
1200 __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);
1201 __ide_add_setting(drive, "init_speed", SETTING_RW, -1, -1, TYPE_BYTE, 0, 70, 1, 1, &drive->init_speed, NULL, 0);
1202 __ide_add_setting(drive, "current_speed", SETTING_RW, -1, -1, TYPE_BYTE, 0, 70, 1, 1, &drive->current_speed, set_xfer_rate, 0);
1203 __ide_add_setting(drive, "number", SETTING_RW, -1, -1, TYPE_BYTE, 0, 3, 1, 1, &drive->dn, NULL, 0);
1204}
1205
1206/**
1207 * system_bus_clock - clock guess
1208 *
1209 * External version of the bus clock guess used by very old IDE drivers
1210 * for things like VLB timings. Should not be used.
1211 */
1212
1213int system_bus_clock (void)
1214{
1215 return((int) ((!system_bus_speed) ? ide_system_bus_speed() : system_bus_speed ));
1216}
1217
1218EXPORT_SYMBOL(system_bus_clock);
1219
David Brownellb887d2e2006-08-14 23:11:05 -07001220static int generic_ide_suspend(struct device *dev, pm_message_t mesg)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001221{
1222 ide_drive_t *drive = dev->driver_data;
Hannes Reineckee3a59b42007-02-07 18:19:37 +01001223 ide_hwif_t *hwif = HWIF(drive);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001224 struct request rq;
1225 struct request_pm_state rqpm;
1226 ide_task_t args;
1227
Hannes Reineckee3a59b42007-02-07 18:19:37 +01001228 /* Call ACPI _GTM only once */
1229 if (!(drive->dn % 2))
1230 ide_acpi_get_timing(hwif);
1231
Linus Torvalds1da177e2005-04-16 15:20:36 -07001232 memset(&rq, 0, sizeof(rq));
1233 memset(&rqpm, 0, sizeof(rqpm));
1234 memset(&args, 0, sizeof(args));
Jens Axboe4aff5e22006-08-10 08:44:47 +02001235 rq.cmd_type = REQ_TYPE_PM_SUSPEND;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001236 rq.special = &args;
Jens Axboec00895a2006-09-30 20:29:12 +02001237 rq.data = &rqpm;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001238 rqpm.pm_step = ide_pm_state_start_suspend;
David Brownellb887d2e2006-08-14 23:11:05 -07001239 if (mesg.event == PM_EVENT_PRETHAW)
1240 mesg.event = PM_EVENT_FREEZE;
1241 rqpm.pm_state = mesg.event;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001242
1243 return ide_do_drive_cmd(drive, &rq, ide_wait);
1244}
1245
1246static int generic_ide_resume(struct device *dev)
1247{
1248 ide_drive_t *drive = dev->driver_data;
Hannes Reineckee3a59b42007-02-07 18:19:37 +01001249 ide_hwif_t *hwif = HWIF(drive);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001250 struct request rq;
1251 struct request_pm_state rqpm;
1252 ide_task_t args;
1253
Hannes Reineckee3a59b42007-02-07 18:19:37 +01001254 /* Call ACPI _STM only once */
1255 if (!(drive->dn % 2))
1256 ide_acpi_push_timing(hwif);
1257
1258 ide_acpi_exec_tfs(drive);
1259
Linus Torvalds1da177e2005-04-16 15:20:36 -07001260 memset(&rq, 0, sizeof(rq));
1261 memset(&rqpm, 0, sizeof(rqpm));
1262 memset(&args, 0, sizeof(args));
Jens Axboe4aff5e22006-08-10 08:44:47 +02001263 rq.cmd_type = REQ_TYPE_PM_RESUME;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001264 rq.special = &args;
Jens Axboec00895a2006-09-30 20:29:12 +02001265 rq.data = &rqpm;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001266 rqpm.pm_step = ide_pm_state_start_resume;
Pavel Machekca078ba2005-09-03 15:56:57 -07001267 rqpm.pm_state = PM_EVENT_ON;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001268
1269 return ide_do_drive_cmd(drive, &rq, ide_head_wait);
1270}
1271
1272int generic_ide_ioctl(ide_drive_t *drive, struct file *file, struct block_device *bdev,
1273 unsigned int cmd, unsigned long arg)
1274{
1275 ide_settings_t *setting;
1276 ide_driver_t *drv;
1277 int err = 0;
1278 void __user *p = (void __user *)arg;
1279
1280 down(&ide_setting_sem);
1281 if ((setting = ide_find_setting_by_ioctl(drive, cmd)) != NULL) {
1282 if (cmd == setting->read_ioctl) {
1283 err = ide_read_setting(drive, setting);
1284 up(&ide_setting_sem);
1285 return err >= 0 ? put_user(err, (long __user *)arg) : err;
1286 } else {
1287 if (bdev != bdev->bd_contains)
1288 err = -EINVAL;
1289 else
1290 err = ide_write_setting(drive, setting, arg);
1291 up(&ide_setting_sem);
1292 return err;
1293 }
1294 }
1295 up(&ide_setting_sem);
1296
1297 switch (cmd) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001298 case HDIO_OBSOLETE_IDENTITY:
1299 case HDIO_GET_IDENTITY:
1300 if (bdev != bdev->bd_contains)
1301 return -EINVAL;
1302 if (drive->id_read == 0)
1303 return -ENOMSG;
1304 if (copy_to_user(p, drive->id, (cmd == HDIO_GET_IDENTITY) ? sizeof(*drive->id) : 142))
1305 return -EFAULT;
1306 return 0;
1307
1308 case HDIO_GET_NICE:
1309 return put_user(drive->dsc_overlap << IDE_NICE_DSC_OVERLAP |
1310 drive->atapi_overlap << IDE_NICE_ATAPI_OVERLAP |
1311 drive->nice0 << IDE_NICE_0 |
1312 drive->nice1 << IDE_NICE_1 |
1313 drive->nice2 << IDE_NICE_2,
1314 (long __user *) arg);
1315
1316#ifdef CONFIG_IDE_TASK_IOCTL
1317 case HDIO_DRIVE_TASKFILE:
1318 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
1319 return -EACCES;
1320 switch(drive->media) {
1321 case ide_disk:
1322 return ide_taskfile_ioctl(drive, cmd, arg);
1323 default:
1324 return -ENOMSG;
1325 }
1326#endif /* CONFIG_IDE_TASK_IOCTL */
1327
1328 case HDIO_DRIVE_CMD:
1329 if (!capable(CAP_SYS_RAWIO))
1330 return -EACCES;
1331 return ide_cmd_ioctl(drive, cmd, arg);
1332
1333 case HDIO_DRIVE_TASK:
1334 if (!capable(CAP_SYS_RAWIO))
1335 return -EACCES;
1336 return ide_task_ioctl(drive, cmd, arg);
1337
1338 case HDIO_SCAN_HWIF:
1339 {
1340 hw_regs_t hw;
1341 int args[3];
1342 if (!capable(CAP_SYS_RAWIO)) return -EACCES;
1343 if (copy_from_user(args, p, 3 * sizeof(int)))
1344 return -EFAULT;
1345 memset(&hw, 0, sizeof(hw));
1346 ide_init_hwif_ports(&hw, (unsigned long) args[0],
1347 (unsigned long) args[1], NULL);
1348 hw.irq = args[2];
1349 if (ide_register_hw(&hw, NULL) == -1)
1350 return -EIO;
1351 return 0;
1352 }
1353 case HDIO_UNREGISTER_HWIF:
1354 if (!capable(CAP_SYS_RAWIO)) return -EACCES;
1355 /* (arg > MAX_HWIFS) checked in function */
1356 ide_unregister(arg);
1357 return 0;
1358 case HDIO_SET_NICE:
1359 if (!capable(CAP_SYS_ADMIN)) return -EACCES;
1360 if (arg != (arg & ((1 << IDE_NICE_DSC_OVERLAP) | (1 << IDE_NICE_1))))
1361 return -EPERM;
1362 drive->dsc_overlap = (arg >> IDE_NICE_DSC_OVERLAP) & 1;
1363 drv = *(ide_driver_t **)bdev->bd_disk->private_data;
1364 if (drive->dsc_overlap && !drv->supports_dsc_overlap) {
1365 drive->dsc_overlap = 0;
1366 return -EPERM;
1367 }
1368 drive->nice1 = (arg >> IDE_NICE_1) & 1;
1369 return 0;
1370 case HDIO_DRIVE_RESET:
1371 {
1372 unsigned long flags;
1373 if (!capable(CAP_SYS_ADMIN)) return -EACCES;
1374
1375 /*
1376 * Abort the current command on the
1377 * group if there is one, taking
1378 * care not to allow anything else
1379 * to be queued and to die on the
1380 * spot if we miss one somehow
1381 */
1382
1383 spin_lock_irqsave(&ide_lock, flags);
1384
Alan Cox913759a2006-10-03 01:14:33 -07001385 if (HWGROUP(drive)->resetting) {
1386 spin_unlock_irqrestore(&ide_lock, flags);
1387 return -EBUSY;
1388 }
1389
Linus Torvalds1da177e2005-04-16 15:20:36 -07001390 ide_abort(drive, "drive reset");
1391
Eric Sesterhenn125e1872006-06-23 02:06:06 -07001392 BUG_ON(HWGROUP(drive)->handler);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001393
1394 /* Ensure nothing gets queued after we
1395 drop the lock. Reset will clear the busy */
1396
1397 HWGROUP(drive)->busy = 1;
1398 spin_unlock_irqrestore(&ide_lock, flags);
1399 (void) ide_do_reset(drive);
1400
1401 return 0;
1402 }
1403
1404 case CDROMEJECT:
1405 case CDROMCLOSETRAY:
1406 return scsi_cmd_ioctl(file, bdev->bd_disk, cmd, p);
1407
1408 case HDIO_GET_BUSSTATE:
1409 if (!capable(CAP_SYS_ADMIN))
1410 return -EACCES;
1411 if (put_user(HWIF(drive)->bus_state, (long __user *)arg))
1412 return -EFAULT;
1413 return 0;
1414
1415 case HDIO_SET_BUSSTATE:
1416 if (!capable(CAP_SYS_ADMIN))
1417 return -EACCES;
1418 if (HWIF(drive)->busproc)
1419 return HWIF(drive)->busproc(drive, (int)arg);
1420 return -EOPNOTSUPP;
1421 default:
1422 return -EINVAL;
1423 }
1424}
1425
1426EXPORT_SYMBOL(generic_ide_ioctl);
1427
1428/*
1429 * stridx() returns the offset of c within s,
1430 * or -1 if c is '\0' or not found within s.
1431 */
1432static int __init stridx (const char *s, char c)
1433{
1434 char *i = strchr(s, c);
1435 return (i && c) ? i - s : -1;
1436}
1437
1438/*
1439 * match_parm() does parsing for ide_setup():
1440 *
1441 * 1. the first char of s must be '='.
1442 * 2. if the remainder matches one of the supplied keywords,
1443 * the index (1 based) of the keyword is negated and returned.
1444 * 3. if the remainder is a series of no more than max_vals numbers
1445 * separated by commas, the numbers are saved in vals[] and a
1446 * count of how many were saved is returned. Base10 is assumed,
1447 * and base16 is allowed when prefixed with "0x".
1448 * 4. otherwise, zero is returned.
1449 */
1450static int __init match_parm (char *s, const char *keywords[], int vals[], int max_vals)
1451{
1452 static const char *decimal = "0123456789";
1453 static const char *hex = "0123456789abcdef";
1454 int i, n;
1455
1456 if (*s++ == '=') {
1457 /*
1458 * Try matching against the supplied keywords,
1459 * and return -(index+1) if we match one
1460 */
1461 if (keywords != NULL) {
1462 for (i = 0; *keywords != NULL; ++i) {
1463 if (!strcmp(s, *keywords++))
1464 return -(i+1);
1465 }
1466 }
1467 /*
1468 * Look for a series of no more than "max_vals"
1469 * numeric values separated by commas, in base10,
1470 * or base16 when prefixed with "0x".
1471 * Return a count of how many were found.
1472 */
1473 for (n = 0; (i = stridx(decimal, *s)) >= 0;) {
1474 vals[n] = i;
1475 while ((i = stridx(decimal, *++s)) >= 0)
1476 vals[n] = (vals[n] * 10) + i;
1477 if (*s == 'x' && !vals[n]) {
1478 while ((i = stridx(hex, *++s)) >= 0)
1479 vals[n] = (vals[n] * 0x10) + i;
1480 }
1481 if (++n == max_vals)
1482 break;
1483 if (*s == ',' || *s == ';')
1484 ++s;
1485 }
1486 if (!*s)
1487 return n;
1488 }
1489 return 0; /* zero = nothing matched */
1490}
1491
1492#ifdef CONFIG_BLK_DEV_ALI14XX
1493static int __initdata probe_ali14xx;
1494extern int ali14xx_init(void);
1495#endif
1496#ifdef CONFIG_BLK_DEV_UMC8672
1497static int __initdata probe_umc8672;
1498extern int umc8672_init(void);
1499#endif
1500#ifdef CONFIG_BLK_DEV_DTC2278
1501static int __initdata probe_dtc2278;
1502extern int dtc2278_init(void);
1503#endif
1504#ifdef CONFIG_BLK_DEV_HT6560B
1505static int __initdata probe_ht6560b;
1506extern int ht6560b_init(void);
1507#endif
1508#ifdef CONFIG_BLK_DEV_QD65XX
1509static int __initdata probe_qd65xx;
1510extern int qd65xx_init(void);
1511#endif
1512
1513static int __initdata is_chipset_set[MAX_HWIFS];
1514
1515/*
1516 * ide_setup() gets called VERY EARLY during initialization,
1517 * to handle kernel "command line" strings beginning with "hdx=" or "ide".
1518 *
1519 * Remember to update Documentation/ide.txt if you change something here.
1520 */
1521static int __init ide_setup(char *s)
1522{
1523 int i, vals[3];
1524 ide_hwif_t *hwif;
1525 ide_drive_t *drive;
1526 unsigned int hw, unit;
1527 const char max_drive = 'a' + ((MAX_HWIFS * MAX_DRIVES) - 1);
1528 const char max_hwif = '0' + (MAX_HWIFS - 1);
1529
1530
1531 if (strncmp(s,"hd",2) == 0 && s[2] == '=') /* hd= is for hd.c */
1532 return 0; /* driver and not us */
1533
1534 if (strncmp(s,"ide",3) && strncmp(s,"idebus",6) && strncmp(s,"hd",2))
1535 return 0;
1536
1537 printk(KERN_INFO "ide_setup: %s", s);
1538 init_ide_data ();
1539
1540#ifdef CONFIG_BLK_DEV_IDEDOUBLER
1541 if (!strcmp(s, "ide=doubler")) {
1542 extern int ide_doubler;
1543
1544 printk(" : Enabled support for IDE doublers\n");
1545 ide_doubler = 1;
1546 return 1;
1547 }
1548#endif /* CONFIG_BLK_DEV_IDEDOUBLER */
1549
1550 if (!strcmp(s, "ide=nodma")) {
1551 printk(" : Prevented DMA\n");
1552 noautodma = 1;
1553 return 1;
1554 }
1555
1556#ifdef CONFIG_BLK_DEV_IDEPCI
1557 if (!strcmp(s, "ide=reverse")) {
1558 ide_scan_direction = 1;
1559 printk(" : Enabled support for IDE inverse scan order.\n");
1560 return 1;
1561 }
1562#endif /* CONFIG_BLK_DEV_IDEPCI */
1563
Hannes Reineckee3a59b42007-02-07 18:19:37 +01001564#ifdef CONFIG_BLK_DEV_IDEACPI
1565 if (!strcmp(s, "ide=noacpi")) {
1566 //printk(" : Disable IDE ACPI support.\n");
1567 ide_noacpi = 1;
1568 return 1;
1569 }
1570 if (!strcmp(s, "ide=acpigtf")) {
1571 //printk(" : Enable IDE ACPI _GTF support.\n");
1572 ide_noacpitfs = 0;
1573 return 1;
1574 }
1575 if (!strcmp(s, "ide=acpionboot")) {
1576 //printk(" : Call IDE ACPI methods on boot.\n");
1577 ide_noacpionboot = 0;
1578 return 1;
1579 }
1580#endif /* CONFIG_BLK_DEV_IDEACPI */
1581
Linus Torvalds1da177e2005-04-16 15:20:36 -07001582 /*
1583 * Look for drive options: "hdx="
1584 */
1585 if (s[0] == 'h' && s[1] == 'd' && s[2] >= 'a' && s[2] <= max_drive) {
1586 const char *hd_words[] = {
1587 "none", "noprobe", "nowerr", "cdrom", "serialize",
1588 "autotune", "noautotune", "minus8", "swapdata", "bswap",
Jens Axboe36193482006-07-28 08:54:59 +02001589 "noflush", "remap", "remap63", "scsi", NULL };
Linus Torvalds1da177e2005-04-16 15:20:36 -07001590 unit = s[2] - 'a';
1591 hw = unit / MAX_DRIVES;
1592 unit = unit % MAX_DRIVES;
1593 hwif = &ide_hwifs[hw];
1594 drive = &hwif->drives[unit];
1595 if (strncmp(s + 4, "ide-", 4) == 0) {
1596 strlcpy(drive->driver_req, s + 4, sizeof(drive->driver_req));
1597 goto done;
1598 }
1599 switch (match_parm(&s[3], hd_words, vals, 3)) {
1600 case -1: /* "none" */
1601 case -2: /* "noprobe" */
1602 drive->noprobe = 1;
1603 goto done;
1604 case -3: /* "nowerr" */
1605 drive->bad_wstat = BAD_R_STAT;
1606 hwif->noprobe = 0;
1607 goto done;
1608 case -4: /* "cdrom" */
1609 drive->present = 1;
1610 drive->media = ide_cdrom;
1611 /* an ATAPI device ignores DRDY */
1612 drive->ready_stat = 0;
1613 hwif->noprobe = 0;
1614 goto done;
1615 case -5: /* "serialize" */
1616 printk(" -- USE \"ide%d=serialize\" INSTEAD", hw);
1617 goto do_serialize;
1618 case -6: /* "autotune" */
1619 drive->autotune = IDE_TUNE_AUTO;
1620 goto obsolete_option;
1621 case -7: /* "noautotune" */
1622 drive->autotune = IDE_TUNE_NOAUTO;
1623 goto obsolete_option;
1624 case -9: /* "swapdata" */
1625 case -10: /* "bswap" */
1626 drive->bswap = 1;
1627 goto done;
Jens Axboe36193482006-07-28 08:54:59 +02001628 case -11: /* noflush */
1629 drive->noflush = 1;
1630 goto done;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001631 case -12: /* "remap" */
1632 drive->remap_0_to_1 = 1;
1633 goto done;
1634 case -13: /* "remap63" */
1635 drive->sect0 = 63;
1636 goto done;
1637 case -14: /* "scsi" */
1638 drive->scsi = 1;
1639 goto done;
1640 case 3: /* cyl,head,sect */
1641 drive->media = ide_disk;
1642 drive->ready_stat = READY_STAT;
1643 drive->cyl = drive->bios_cyl = vals[0];
1644 drive->head = drive->bios_head = vals[1];
1645 drive->sect = drive->bios_sect = vals[2];
1646 drive->present = 1;
1647 drive->forced_geom = 1;
1648 hwif->noprobe = 0;
1649 goto done;
1650 default:
1651 goto bad_option;
1652 }
1653 }
1654
1655 if (s[0] != 'i' || s[1] != 'd' || s[2] != 'e')
1656 goto bad_option;
1657 /*
1658 * Look for bus speed option: "idebus="
1659 */
1660 if (s[3] == 'b' && s[4] == 'u' && s[5] == 's') {
1661 if (match_parm(&s[6], NULL, vals, 1) != 1)
1662 goto bad_option;
1663 if (vals[0] >= 20 && vals[0] <= 66) {
1664 idebus_parameter = vals[0];
1665 } else
1666 printk(" -- BAD BUS SPEED! Expected value from 20 to 66");
1667 goto done;
1668 }
1669 /*
1670 * Look for interface options: "idex="
1671 */
1672 if (s[3] >= '0' && s[3] <= max_hwif) {
1673 /*
1674 * Be VERY CAREFUL changing this: note hardcoded indexes below
1675 * (-8, -9, -10) are reserved to ease the hardcoding.
1676 */
1677 static const char *ide_words[] = {
1678 "noprobe", "serialize", "autotune", "noautotune",
1679 "reset", "dma", "ata66", "minus8", "minus9",
1680 "minus10", "four", "qd65xx", "ht6560b", "cmd640_vlb",
1681 "dtc2278", "umc8672", "ali14xx", NULL };
1682 hw = s[3] - '0';
1683 hwif = &ide_hwifs[hw];
1684 i = match_parm(&s[4], ide_words, vals, 3);
1685
1686 /*
1687 * Cryptic check to ensure chipset not already set for hwif.
1688 * Note: we can't depend on hwif->chipset here.
1689 */
1690 if ((i >= -18 && i <= -11) || (i > 0 && i <= 3)) {
1691 /* chipset already specified */
1692 if (is_chipset_set[hw])
1693 goto bad_option;
1694 if (i > -18 && i <= -11) {
1695 /* these drivers are for "ide0=" only */
1696 if (hw != 0)
1697 goto bad_hwif;
1698 /* chipset already specified for 2nd port */
1699 if (is_chipset_set[hw+1])
1700 goto bad_option;
1701 }
1702 is_chipset_set[hw] = 1;
1703 printk("\n");
1704 }
1705
1706 switch (i) {
1707#ifdef CONFIG_BLK_DEV_ALI14XX
1708 case -17: /* "ali14xx" */
1709 probe_ali14xx = 1;
1710 goto done;
1711#endif
1712#ifdef CONFIG_BLK_DEV_UMC8672
1713 case -16: /* "umc8672" */
1714 probe_umc8672 = 1;
1715 goto done;
1716#endif
1717#ifdef CONFIG_BLK_DEV_DTC2278
1718 case -15: /* "dtc2278" */
1719 probe_dtc2278 = 1;
1720 goto done;
1721#endif
1722#ifdef CONFIG_BLK_DEV_CMD640
1723 case -14: /* "cmd640_vlb" */
1724 {
1725 extern int cmd640_vlb; /* flag for cmd640.c */
1726 cmd640_vlb = 1;
1727 goto done;
1728 }
1729#endif
1730#ifdef CONFIG_BLK_DEV_HT6560B
1731 case -13: /* "ht6560b" */
1732 probe_ht6560b = 1;
1733 goto done;
1734#endif
1735#ifdef CONFIG_BLK_DEV_QD65XX
1736 case -12: /* "qd65xx" */
1737 probe_qd65xx = 1;
1738 goto done;
1739#endif
1740#ifdef CONFIG_BLK_DEV_4DRIVES
1741 case -11: /* "four" drives on one set of ports */
1742 {
1743 ide_hwif_t *mate = &ide_hwifs[hw^1];
1744 mate->drives[0].select.all ^= 0x20;
1745 mate->drives[1].select.all ^= 0x20;
1746 hwif->chipset = mate->chipset = ide_4drives;
1747 mate->irq = hwif->irq;
1748 memcpy(mate->io_ports, hwif->io_ports, sizeof(hwif->io_ports));
1749 goto do_serialize;
1750 }
1751#endif /* CONFIG_BLK_DEV_4DRIVES */
1752 case -10: /* minus10 */
1753 case -9: /* minus9 */
1754 case -8: /* minus8 */
1755 goto bad_option;
1756 case -7: /* ata66 */
1757#ifdef CONFIG_BLK_DEV_IDEPCI
1758 hwif->udma_four = 1;
1759 goto obsolete_option;
1760#else
1761 goto bad_hwif;
1762#endif
1763 case -6: /* dma */
1764 hwif->autodma = 1;
1765 goto obsolete_option;
1766 case -5: /* "reset" */
1767 hwif->reset = 1;
1768 goto obsolete_option;
1769 case -4: /* "noautotune" */
1770 hwif->drives[0].autotune = IDE_TUNE_NOAUTO;
1771 hwif->drives[1].autotune = IDE_TUNE_NOAUTO;
1772 goto obsolete_option;
1773 case -3: /* "autotune" */
1774 hwif->drives[0].autotune = IDE_TUNE_AUTO;
1775 hwif->drives[1].autotune = IDE_TUNE_AUTO;
1776 goto obsolete_option;
1777 case -2: /* "serialize" */
1778 do_serialize:
1779 hwif->mate = &ide_hwifs[hw^1];
1780 hwif->mate->mate = hwif;
1781 hwif->serialized = hwif->mate->serialized = 1;
1782 goto obsolete_option;
1783
1784 case -1: /* "noprobe" */
1785 hwif->noprobe = 1;
1786 goto done;
1787
1788 case 1: /* base */
1789 vals[1] = vals[0] + 0x206; /* default ctl */
1790 case 2: /* base,ctl */
1791 vals[2] = 0; /* default irq = probe for it */
1792 case 3: /* base,ctl,irq */
1793 hwif->hw.irq = vals[2];
1794 ide_init_hwif_ports(&hwif->hw, (unsigned long) vals[0], (unsigned long) vals[1], &hwif->irq);
1795 memcpy(hwif->io_ports, hwif->hw.io_ports, sizeof(hwif->io_ports));
1796 hwif->irq = vals[2];
1797 hwif->noprobe = 0;
1798 hwif->chipset = ide_forced;
1799 goto obsolete_option;
1800
1801 case 0: goto bad_option;
1802 default:
1803 printk(" -- SUPPORT NOT CONFIGURED IN THIS KERNEL\n");
1804 return 1;
1805 }
1806 }
1807bad_option:
1808 printk(" -- BAD OPTION\n");
1809 return 1;
1810obsolete_option:
1811 printk(" -- OBSOLETE OPTION, WILL BE REMOVED SOON!\n");
1812 return 1;
1813bad_hwif:
1814 printk("-- NOT SUPPORTED ON ide%d", hw);
1815done:
1816 printk("\n");
1817 return 1;
1818}
1819
Al Viroeb797222007-02-01 13:52:38 +00001820extern void __init pnpide_init(void);
1821extern void __exit pnpide_exit(void);
1822extern void __init h8300_ide_init(void);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001823
1824/*
1825 * probe_for_hwifs() finds/initializes "known" IDE interfaces
1826 */
1827static void __init probe_for_hwifs (void)
1828{
1829#ifdef CONFIG_BLK_DEV_IDEPCI
1830 ide_scan_pcibus(ide_scan_direction);
1831#endif /* CONFIG_BLK_DEV_IDEPCI */
1832
1833#ifdef CONFIG_ETRAX_IDE
1834 {
1835 extern void init_e100_ide(void);
1836 init_e100_ide();
1837 }
1838#endif /* CONFIG_ETRAX_IDE */
1839#ifdef CONFIG_BLK_DEV_CMD640
1840 {
1841 extern void ide_probe_for_cmd640x(void);
1842 ide_probe_for_cmd640x();
1843 }
1844#endif /* CONFIG_BLK_DEV_CMD640 */
1845#ifdef CONFIG_BLK_DEV_IDE_PMAC
1846 {
1847 extern void pmac_ide_probe(void);
1848 pmac_ide_probe();
1849 }
1850#endif /* CONFIG_BLK_DEV_IDE_PMAC */
1851#ifdef CONFIG_BLK_DEV_GAYLE
1852 {
1853 extern void gayle_init(void);
1854 gayle_init();
1855 }
1856#endif /* CONFIG_BLK_DEV_GAYLE */
1857#ifdef CONFIG_BLK_DEV_FALCON_IDE
1858 {
1859 extern void falconide_init(void);
1860 falconide_init();
1861 }
1862#endif /* CONFIG_BLK_DEV_FALCON_IDE */
1863#ifdef CONFIG_BLK_DEV_MAC_IDE
1864 {
1865 extern void macide_init(void);
1866 macide_init();
1867 }
1868#endif /* CONFIG_BLK_DEV_MAC_IDE */
1869#ifdef CONFIG_BLK_DEV_Q40IDE
1870 {
1871 extern void q40ide_init(void);
1872 q40ide_init();
1873 }
1874#endif /* CONFIG_BLK_DEV_Q40IDE */
1875#ifdef CONFIG_BLK_DEV_BUDDHA
1876 {
1877 extern void buddha_init(void);
1878 buddha_init();
1879 }
1880#endif /* CONFIG_BLK_DEV_BUDDHA */
1881#ifdef CONFIG_BLK_DEV_IDEPNP
1882 pnpide_init();
1883#endif
1884#ifdef CONFIG_H8300
1885 h8300_ide_init();
1886#endif
1887}
1888
Bartlomiej Zolnierkiewicz8604aff2005-05-26 14:55:34 +02001889void ide_register_subdriver(ide_drive_t *drive, ide_driver_t *driver)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001890{
Linus Torvalds1da177e2005-04-16 15:20:36 -07001891#ifdef CONFIG_PROC_FS
Bartlomiej Zolnierkiewicz8604aff2005-05-26 14:55:34 +02001892 ide_add_proc_entries(drive->proc, driver->proc, drive);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001893#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07001894}
1895
1896EXPORT_SYMBOL(ide_register_subdriver);
1897
1898/**
1899 * ide_unregister_subdriver - disconnect drive from driver
1900 * @drive: drive to unplug
Bartlomiej Zolnierkiewicz8604aff2005-05-26 14:55:34 +02001901 * @driver: driver
Linus Torvalds1da177e2005-04-16 15:20:36 -07001902 *
1903 * Disconnect a drive from the driver it was attached to and then
1904 * clean up the various proc files and other objects attached to it.
1905 *
Bartlomiej Zolnierkiewicz8604aff2005-05-26 14:55:34 +02001906 * Takes ide_setting_sem and ide_lock.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001907 * Caller must hold none of the locks.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001908 */
1909
Bartlomiej Zolnierkiewicz8604aff2005-05-26 14:55:34 +02001910void ide_unregister_subdriver(ide_drive_t *drive, ide_driver_t *driver)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001911{
1912 unsigned long flags;
1913
Linus Torvalds1da177e2005-04-16 15:20:36 -07001914#ifdef CONFIG_PROC_FS
Bartlomiej Zolnierkiewicz8604aff2005-05-26 14:55:34 +02001915 ide_remove_proc_entries(drive->proc, driver->proc);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001916#endif
Peter Zijlstra9a2239b2006-12-06 20:36:13 -08001917 down(&ide_setting_sem);
1918 spin_lock_irqsave(&ide_lock, flags);
1919 /*
1920 * ide_setting_sem protects the settings list
1921 * ide_lock protects the use of settings
1922 *
1923 * so we need to hold both, ide_settings_sem because we want to
1924 * modify the settings list, and ide_lock because we cannot take
1925 * a setting out that is being used.
1926 *
1927 * OTOH both ide_{read,write}_setting are only ever used under
1928 * ide_setting_sem.
1929 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001930 auto_remove_settings(drive);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001931 spin_unlock_irqrestore(&ide_lock, flags);
1932 up(&ide_setting_sem);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001933}
1934
1935EXPORT_SYMBOL(ide_unregister_subdriver);
1936
Linus Torvalds1da177e2005-04-16 15:20:36 -07001937/*
1938 * Probe module
1939 */
1940
1941EXPORT_SYMBOL(ide_lock);
1942
Bartlomiej Zolnierkiewicz8604aff2005-05-26 14:55:34 +02001943static int ide_bus_match(struct device *dev, struct device_driver *drv)
1944{
1945 return 1;
1946}
1947
Kay Sievers263756e2005-12-12 18:03:44 +01001948static char *media_string(ide_drive_t *drive)
1949{
1950 switch (drive->media) {
1951 case ide_disk:
1952 return "disk";
1953 case ide_cdrom:
1954 return "cdrom";
1955 case ide_tape:
1956 return "tape";
1957 case ide_floppy:
1958 return "floppy";
1959 default:
1960 return "UNKNOWN";
1961 }
1962}
1963
1964static ssize_t media_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", media_string(drive));
1968}
1969
1970static ssize_t drivename_show(struct device *dev, struct device_attribute *attr, char *buf)
1971{
1972 ide_drive_t *drive = to_ide_device(dev);
1973 return sprintf(buf, "%s\n", drive->name);
1974}
1975
1976static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf)
1977{
1978 ide_drive_t *drive = to_ide_device(dev);
1979 return sprintf(buf, "ide:m-%s\n", media_string(drive));
1980}
1981
1982static struct device_attribute ide_dev_attrs[] = {
1983 __ATTR_RO(media),
1984 __ATTR_RO(drivename),
1985 __ATTR_RO(modalias),
1986 __ATTR_NULL
1987};
1988
1989static int ide_uevent(struct device *dev, char **envp, int num_envp,
1990 char *buffer, int buffer_size)
1991{
1992 ide_drive_t *drive = to_ide_device(dev);
1993 int i = 0;
1994 int length = 0;
1995
1996 add_uevent_var(envp, num_envp, &i, buffer, buffer_size, &length,
1997 "MEDIA=%s", media_string(drive));
1998 add_uevent_var(envp, num_envp, &i, buffer, buffer_size, &length,
1999 "DRIVENAME=%s", drive->name);
2000 add_uevent_var(envp, num_envp, &i, buffer, buffer_size, &length,
2001 "MODALIAS=ide:m-%s", media_string(drive));
2002 envp[i] = NULL;
2003 return 0;
2004}
2005
Russell King4031bbe2006-01-06 11:41:00 +00002006static int generic_ide_probe(struct device *dev)
2007{
2008 ide_drive_t *drive = to_ide_device(dev);
2009 ide_driver_t *drv = to_ide_driver(dev->driver);
2010
2011 return drv->probe ? drv->probe(drive) : -ENODEV;
2012}
2013
2014static int generic_ide_remove(struct device *dev)
2015{
2016 ide_drive_t *drive = to_ide_device(dev);
2017 ide_driver_t *drv = to_ide_driver(dev->driver);
2018
2019 if (drv->remove)
2020 drv->remove(drive);
2021
2022 return 0;
2023}
2024
2025static void generic_ide_shutdown(struct device *dev)
2026{
2027 ide_drive_t *drive = to_ide_device(dev);
2028 ide_driver_t *drv = to_ide_driver(dev->driver);
2029
2030 if (dev->driver && drv->shutdown)
2031 drv->shutdown(drive);
2032}
2033
Linus Torvalds1da177e2005-04-16 15:20:36 -07002034struct bus_type ide_bus_type = {
2035 .name = "ide",
Bartlomiej Zolnierkiewicz8604aff2005-05-26 14:55:34 +02002036 .match = ide_bus_match,
Kay Sievers263756e2005-12-12 18:03:44 +01002037 .uevent = ide_uevent,
Russell King4031bbe2006-01-06 11:41:00 +00002038 .probe = generic_ide_probe,
2039 .remove = generic_ide_remove,
2040 .shutdown = generic_ide_shutdown,
Kay Sievers263756e2005-12-12 18:03:44 +01002041 .dev_attrs = ide_dev_attrs,
Linus Torvalds1da177e2005-04-16 15:20:36 -07002042 .suspend = generic_ide_suspend,
2043 .resume = generic_ide_resume,
2044};
2045
Bartlomiej Zolnierkiewicz8604aff2005-05-26 14:55:34 +02002046EXPORT_SYMBOL_GPL(ide_bus_type);
2047
Linus Torvalds1da177e2005-04-16 15:20:36 -07002048/*
2049 * This is gets invoked once during initialization, to set *everything* up
2050 */
2051static int __init ide_init(void)
2052{
Randy Dunlap349ae232006-10-03 01:14:23 -07002053 int ret;
2054
Linus Torvalds1da177e2005-04-16 15:20:36 -07002055 printk(KERN_INFO "Uniform Multi-Platform E-IDE driver " REVISION "\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07002056 system_bus_speed = ide_system_bus_speed();
2057
Randy Dunlap349ae232006-10-03 01:14:23 -07002058 ret = bus_register(&ide_bus_type);
2059 if (ret < 0) {
2060 printk(KERN_WARNING "IDE: bus_register error: %d\n", ret);
2061 return ret;
2062 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002063
2064 init_ide_data();
2065
2066#ifdef CONFIG_PROC_FS
2067 proc_ide_root = proc_mkdir("ide", NULL);
2068#endif
2069
2070#ifdef CONFIG_BLK_DEV_ALI14XX
2071 if (probe_ali14xx)
2072 (void)ali14xx_init();
2073#endif
2074#ifdef CONFIG_BLK_DEV_UMC8672
2075 if (probe_umc8672)
2076 (void)umc8672_init();
2077#endif
2078#ifdef CONFIG_BLK_DEV_DTC2278
2079 if (probe_dtc2278)
2080 (void)dtc2278_init();
2081#endif
2082#ifdef CONFIG_BLK_DEV_HT6560B
2083 if (probe_ht6560b)
2084 (void)ht6560b_init();
2085#endif
2086#ifdef CONFIG_BLK_DEV_QD65XX
2087 if (probe_qd65xx)
2088 (void)qd65xx_init();
2089#endif
2090
2091 initializing = 1;
2092 /* Probe for special PCI and other "known" interface chipsets. */
2093 probe_for_hwifs();
2094 initializing = 0;
2095
2096#ifdef CONFIG_PROC_FS
2097 proc_ide_create();
2098#endif
2099 return 0;
2100}
2101
2102#ifdef MODULE
2103static char *options = NULL;
2104module_param(options, charp, 0);
2105MODULE_LICENSE("GPL");
2106
2107static void __init parse_options (char *line)
2108{
2109 char *next = line;
2110
2111 if (line == NULL || !*line)
2112 return;
2113 while ((line = next) != NULL) {
2114 if ((next = strchr(line,' ')) != NULL)
2115 *next++ = 0;
2116 if (!ide_setup(line))
2117 printk (KERN_INFO "Unknown option '%s'\n", line);
2118 }
2119}
2120
Sam Ravnborgfbd8ad32006-03-25 03:07:11 -08002121int __init init_module (void)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002122{
2123 parse_options(options);
2124 return ide_init();
2125}
2126
Al Viroeb797222007-02-01 13:52:38 +00002127void __exit cleanup_module (void)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002128{
2129 int index;
2130
2131 for (index = 0; index < MAX_HWIFS; ++index)
2132 ide_unregister(index);
2133
Tejun Heo68550362007-01-27 13:47:02 +01002134#ifdef CONFIG_BLK_DEV_IDEPNP
2135 pnpide_exit();
2136#endif
2137
Linus Torvalds1da177e2005-04-16 15:20:36 -07002138#ifdef CONFIG_PROC_FS
2139 proc_ide_destroy();
2140#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07002141
2142 bus_unregister(&ide_bus_type);
2143}
2144
2145#else /* !MODULE */
2146
2147__setup("", ide_setup);
2148
2149module_init(ide_init);
2150
2151#endif /* MODULE */