blob: c758dcb13b14209a97bfdca02ef056ee113712a7 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
Bartlomiej Zolnierkiewicz59bca8c2008-02-01 23:09:33 +01002 * Copyright (C) 1994-1998 Linus Torvalds & authors (see below)
3 * Copyrifht (C) 2003-2005, 2007 Bartlomiej Zolnierkiewicz
Linus Torvalds1da177e2005-04-16 15:20:36 -07004 */
5
6/*
7 * Mostly written by Mark Lord <mlord@pobox.com>
8 * and Gadi Oxman <gadio@netvision.net.il>
9 * and Andre Hedrick <andre@linux-ide.org>
10 *
11 * See linux/MAINTAINERS for address of current maintainer.
12 *
13 * This is the multiple IDE interface driver, as evolved from hd.c.
14 * It supports up to MAX_HWIFS IDE interfaces, on one or more IRQs
15 * (usually 14 & 15).
16 * There can be up to two drives per interface, as per the ATA-2 spec.
17 *
Linus Torvalds1da177e2005-04-16 15:20:36 -070018 * ...
19 *
20 * From hd.c:
21 * |
22 * | It traverses the request-list, using interrupts to jump between functions.
23 * | As nearly all functions can be called within interrupts, we may not sleep.
24 * | Special care is recommended. Have Fun!
25 * |
26 * | modified by Drew Eckhardt to check nr of hd's from the CMOS.
27 * |
28 * | Thanks to Branko Lankester, lankeste@fwi.uva.nl, who found a bug
29 * | in the early extended-partition checks and added DM partitions.
30 * |
31 * | Early work on error handling by Mika Liljeberg (liljeber@cs.Helsinki.FI).
32 * |
33 * | IRQ-unmask, drive-id, multiple-mode, support for ">16 heads",
34 * | and general streamlining by Mark Lord (mlord@pobox.com).
35 *
36 * October, 1994 -- Complete line-by-line overhaul for linux 1.1.x, by:
37 *
38 * Mark Lord (mlord@pobox.com) (IDE Perf.Pkg)
39 * Delman Lee (delman@ieee.org) ("Mr. atdisk2")
40 * Scott Snyder (snyder@fnald0.fnal.gov) (ATAPI IDE cd-rom)
41 *
42 * This was a rewrite of just about everything from hd.c, though some original
43 * code is still sprinkled about. Think of it as a major evolution, with
44 * inspiration from lots of linux users, esp. hamish@zot.apana.org.au
Linus Torvalds1da177e2005-04-16 15:20:36 -070045 */
46
Linus Torvalds1da177e2005-04-16 15:20:36 -070047#define _IDE_C /* Tell ide.h it's really us */
48
Linus Torvalds1da177e2005-04-16 15:20:36 -070049#include <linux/module.h>
50#include <linux/types.h>
51#include <linux/string.h>
52#include <linux/kernel.h>
53#include <linux/timer.h>
54#include <linux/mm.h>
55#include <linux/interrupt.h>
56#include <linux/major.h>
57#include <linux/errno.h>
58#include <linux/genhd.h>
59#include <linux/blkpg.h>
60#include <linux/slab.h>
61#include <linux/init.h>
62#include <linux/pci.h>
63#include <linux/delay.h>
64#include <linux/ide.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070065#include <linux/completion.h>
66#include <linux/reboot.h>
67#include <linux/cdrom.h>
68#include <linux/seq_file.h>
69#include <linux/device.h>
70#include <linux/bitops.h>
71
72#include <asm/byteorder.h>
73#include <asm/irq.h>
74#include <asm/uaccess.h>
75#include <asm/io.h>
76
77
78/* default maximum number of failures */
79#define IDE_DEFAULT_MAX_FAILURES 1
80
Bartlomiej Zolnierkiewiczf74c9142008-04-18 00:46:23 +020081struct class *ide_port_class;
82
Linus Torvalds1da177e2005-04-16 15:20:36 -070083static const u8 ide_hwif_to_major[] = { IDE0_MAJOR, IDE1_MAJOR,
84 IDE2_MAJOR, IDE3_MAJOR,
85 IDE4_MAJOR, IDE5_MAJOR,
86 IDE6_MAJOR, IDE7_MAJOR,
87 IDE8_MAJOR, IDE9_MAJOR };
88
89static int idebus_parameter; /* holds the "idebus=" parameter */
90static int system_bus_speed; /* holds what we think is VESA/PCI bus speed */
Linus Torvalds1da177e2005-04-16 15:20:36 -070091
Matthias Kaehlckeef298882007-07-09 23:17:55 +020092DEFINE_MUTEX(ide_cfg_mtx);
Linus Torvalds1da177e2005-04-16 15:20:36 -070093 __cacheline_aligned_in_smp DEFINE_SPINLOCK(ide_lock);
94
Linus Torvalds1da177e2005-04-16 15:20:36 -070095int noautodma = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -070096
Linus Torvalds1da177e2005-04-16 15:20:36 -070097ide_hwif_t ide_hwifs[MAX_HWIFS]; /* master data repository */
98
Bartlomiej Zolnierkiewicz43514ed2008-04-18 00:46:22 +020099static void ide_port_init_devices_data(ide_hwif_t *);
100
Linus Torvalds1da177e2005-04-16 15:20:36 -0700101/*
102 * Do not even *think* about calling this!
103 */
Bartlomiej Zolnierkiewiczcbb010c2008-01-26 20:13:06 +0100104void ide_init_port_data(ide_hwif_t *hwif, unsigned int index)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700105{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700106 /* bulk initialize hwif & drive info with zeros */
107 memset(hwif, 0, sizeof(ide_hwif_t));
108
109 /* fill in any non-zero initial values */
110 hwif->index = index;
111 hwif->major = ide_hwif_to_major[index];
112
113 hwif->name[0] = 'i';
114 hwif->name[1] = 'd';
115 hwif->name[2] = 'e';
116 hwif->name[3] = '0' + index;
117
118 hwif->bus_state = BUSSTATE_ON;
119
Aleksey Makarovf36d4022006-01-09 15:59:27 -0800120 init_completion(&hwif->gendev_rel_comp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700121
122 default_hwif_iops(hwif);
123 default_hwif_transport(hwif);
Bartlomiej Zolnierkiewicz43514ed2008-04-18 00:46:22 +0200124
125 ide_port_init_devices_data(hwif);
126}
127EXPORT_SYMBOL_GPL(ide_init_port_data);
128
129static void ide_port_init_devices_data(ide_hwif_t *hwif)
130{
131 int unit;
132
Linus Torvalds1da177e2005-04-16 15:20:36 -0700133 for (unit = 0; unit < MAX_DRIVES; ++unit) {
134 ide_drive_t *drive = &hwif->drives[unit];
Bartlomiej Zolnierkiewicz43514ed2008-04-18 00:46:22 +0200135 u8 j = (hwif->index * MAX_DRIVES) + unit;
136
137 memset(drive, 0, sizeof(*drive));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700138
139 drive->media = ide_disk;
140 drive->select.all = (unit<<4)|0xa0;
141 drive->hwif = hwif;
142 drive->ctl = 0x08;
143 drive->ready_stat = READY_STAT;
144 drive->bad_wstat = BAD_W_STAT;
145 drive->special.b.recalibrate = 1;
146 drive->special.b.set_geometry = 1;
147 drive->name[0] = 'h';
148 drive->name[1] = 'd';
Bartlomiej Zolnierkiewicz43514ed2008-04-18 00:46:22 +0200149 drive->name[2] = 'a' + j;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700150 drive->max_failures = IDE_DEFAULT_MAX_FAILURES;
Bartlomiej Zolnierkiewicz43514ed2008-04-18 00:46:22 +0200151
Linus Torvalds1da177e2005-04-16 15:20:36 -0700152 INIT_LIST_HEAD(&drive->list);
Aleksey Makarovf36d4022006-01-09 15:59:27 -0800153 init_completion(&drive->gendev_rel_comp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700154 }
155}
Bartlomiej Zolnierkiewicz43514ed2008-04-18 00:46:22 +0200156
Linus Torvalds1da177e2005-04-16 15:20:36 -0700157/*
158 * init_ide_data() sets reasonable default values into all fields
159 * of all instances of the hwifs and drives, but only on the first call.
160 * Subsequent calls have no effect (they don't wipe out anything).
161 *
162 * This routine is normally called at driver initialization time,
163 * but may also be called MUCH earlier during kernel "command-line"
164 * parameter processing. As such, we cannot depend on any other parts
165 * of the kernel (such as memory allocation) to be functioning yet.
166 *
167 * This is too bad, as otherwise we could dynamically allocate the
168 * ide_drive_t structs as needed, rather than always consuming memory
169 * for the max possible number (MAX_HWIFS * MAX_DRIVES) of them.
170 *
171 * FIXME: We should stuff the setup data into __init and copy the
172 * relevant hwifs/allocate them properly during boot.
173 */
174#define MAGIC_COOKIE 0x12345678
175static void __init init_ide_data (void)
176{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700177 unsigned int index;
178 static unsigned long magic_cookie = MAGIC_COOKIE;
179
180 if (magic_cookie != MAGIC_COOKIE)
181 return; /* already initialized */
182 magic_cookie = 0;
183
184 /* Initialise all interface structures */
185 for (index = 0; index < MAX_HWIFS; ++index) {
Bartlomiej Zolnierkiewicz05734262008-04-18 00:46:25 +0200186 ide_hwif_t *hwif = &ide_hwifs[index];
187
Bartlomiej Zolnierkiewiczcbb010c2008-01-26 20:13:06 +0100188 ide_init_port_data(hwif, index);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700189 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700190}
191
192/**
193 * ide_system_bus_speed - guess bus speed
194 *
195 * ide_system_bus_speed() returns what we think is the system VESA/PCI
196 * bus speed (in MHz). This is used for calculating interface PIO timings.
197 * The default is 40 for known PCI systems, 50 otherwise.
198 * The "idebus=xx" parameter can be used to override this value.
199 * The actual value to be used is computed/displayed the first time
200 * through. Drivers should only use this as a last resort.
201 *
202 * Returns a guessed speed in MHz.
203 */
204
205static int ide_system_bus_speed(void)
206{
207#ifdef CONFIG_PCI
208 static struct pci_device_id pci_default[] = {
209 { PCI_DEVICE(PCI_ANY_ID, PCI_ANY_ID) },
210 { }
211 };
212#else
213#define pci_default 0
214#endif /* CONFIG_PCI */
215
Bartlomiej Zolnierkiewicz537f06c2008-02-01 23:09:35 +0100216 /* user supplied value */
217 if (idebus_parameter)
218 return idebus_parameter;
219
220 /* safe default value for PCI or VESA and PCI*/
221 return pci_dev_present(pci_default) ? 33 : 50;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700222}
223
Bartlomiej Zolnierkiewiczfbd13082008-02-01 23:09:36 +0100224void ide_remove_port_from_hwgroup(ide_hwif_t *hwif)
Bartlomiej Zolnierkiewicz96e5ad32008-02-01 23:09:35 +0100225{
226 ide_hwgroup_t *hwgroup = hwif->hwgroup;
227
228 spin_lock_irq(&ide_lock);
229 /*
230 * Remove us from the hwgroup, and free
231 * the hwgroup if we were the only member
232 */
233 if (hwif->next == hwif) {
234 BUG_ON(hwgroup->hwif != hwif);
235 kfree(hwgroup);
236 } else {
237 /* There is another interface in hwgroup.
238 * Unlink us, and set hwgroup->drive and ->hwif to
239 * something sane.
240 */
241 ide_hwif_t *g = hwgroup->hwif;
242
243 while (g->next != hwif)
244 g = g->next;
245 g->next = hwif->next;
246 if (hwgroup->hwif == hwif) {
247 /* Chose a random hwif for hwgroup->hwif.
248 * It's guaranteed that there are no drives
249 * left in the hwgroup.
250 */
251 BUG_ON(hwgroup->drive != NULL);
252 hwgroup->hwif = g;
253 }
254 BUG_ON(hwgroup->hwif == hwif);
255 }
256 spin_unlock_irq(&ide_lock);
257}
258
Bartlomiej Zolnierkiewicz71bf9f62008-04-18 00:46:22 +0200259/* Called with ide_lock held. */
Bartlomiej Zolnierkiewicz2dde7862008-04-18 00:46:23 +0200260static void __ide_port_unregister_devices(ide_hwif_t *hwif)
Bartlomiej Zolnierkiewicz71bf9f62008-04-18 00:46:22 +0200261{
262 int i;
263
264 for (i = 0; i < MAX_DRIVES; i++) {
265 ide_drive_t *drive = &hwif->drives[i];
266
267 if (drive->present) {
268 spin_unlock_irq(&ide_lock);
269 device_unregister(&drive->gendev);
270 wait_for_completion(&drive->gendev_rel_comp);
271 spin_lock_irq(&ide_lock);
272 }
273 }
274}
275
Bartlomiej Zolnierkiewicz2dde7862008-04-18 00:46:23 +0200276void ide_port_unregister_devices(ide_hwif_t *hwif)
277{
278 mutex_lock(&ide_cfg_mtx);
279 spin_lock_irq(&ide_lock);
280 __ide_port_unregister_devices(hwif);
281 hwif->present = 0;
282 ide_port_init_devices_data(hwif);
283 spin_unlock_irq(&ide_lock);
284 mutex_unlock(&ide_cfg_mtx);
285}
286EXPORT_SYMBOL_GPL(ide_port_unregister_devices);
287
Linus Torvalds1da177e2005-04-16 15:20:36 -0700288/**
Sergei Shtylylov020e3222006-10-03 01:14:13 -0700289 * ide_unregister - free an IDE interface
Bartlomiej Zolnierkiewicz387750c2008-04-27 15:38:31 +0200290 * @hwif: IDE interface
Linus Torvalds1da177e2005-04-16 15:20:36 -0700291 *
292 * Perform the final unregister of an IDE interface. At the moment
293 * we don't refcount interfaces so this will also get split up.
294 *
295 * Locking:
296 * The caller must not hold the IDE locks
297 * The drive present/vanishing is not yet properly locked
298 * Take care with the callbacks. These have been split to avoid
299 * deadlocking the IDE layer. The shutdown callback is called
300 * before we take the lock and free resources. It is up to the
301 * caller to be sure there is no pending I/O here, and that
Sergei Shtylylov020e3222006-10-03 01:14:13 -0700302 * the interface will not be reopened (present/vanishing locking
303 * isn't yet done BTW). After we commit to the final kill we
Linus Torvalds1da177e2005-04-16 15:20:36 -0700304 * call the cleanup callback with the ide locks held.
305 *
306 * Unregister restores the hwif structures to the default state.
307 * This is raving bonkers.
308 */
309
Bartlomiej Zolnierkiewicz387750c2008-04-27 15:38:31 +0200310void ide_unregister(ide_hwif_t *hwif)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700311{
Bartlomiej Zolnierkiewicz387750c2008-04-27 15:38:31 +0200312 ide_hwif_t *g;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700313 ide_hwgroup_t *hwgroup;
Bartlomiej Zolnierkiewicz71bf9f62008-04-18 00:46:22 +0200314 int irq_count = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700315
Linus Torvalds1da177e2005-04-16 15:20:36 -0700316 BUG_ON(in_interrupt());
317 BUG_ON(irqs_disabled());
Matthias Kaehlckeef298882007-07-09 23:17:55 +0200318 mutex_lock(&ide_cfg_mtx);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700319 spin_lock_irq(&ide_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700320 if (!hwif->present)
321 goto abort;
Bartlomiej Zolnierkiewicz2dde7862008-04-18 00:46:23 +0200322 __ide_port_unregister_devices(hwif);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700323 hwif->present = 0;
324
325 spin_unlock_irq(&ide_lock);
326
Bartlomiej Zolnierkiewicz5cbf79c2007-05-10 00:01:11 +0200327 ide_proc_unregister_port(hwif);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700328
329 hwgroup = hwif->hwgroup;
330 /*
331 * free the irq if we were the only hwif using it
332 */
333 g = hwgroup->hwif;
334 do {
335 if (g->irq == hwif->irq)
336 ++irq_count;
337 g = g->next;
338 } while (g != hwgroup->hwif);
339 if (irq_count == 1)
340 free_irq(hwif->irq, hwgroup);
341
Bartlomiej Zolnierkiewicz96e5ad32008-02-01 23:09:35 +0100342 ide_remove_port_from_hwgroup(hwif);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700343
Bartlomiej Zolnierkiewiczf74c9142008-04-18 00:46:23 +0200344 device_unregister(hwif->portdev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700345 device_unregister(&hwif->gendev);
Aleksey Makarovf36d4022006-01-09 15:59:27 -0800346 wait_for_completion(&hwif->gendev_rel_comp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700347
348 /*
349 * Remove us from the kernel's knowledge
350 */
351 blk_unregister_region(MKDEV(hwif->major, 0), MAX_DRIVES<<PARTN_BITS);
352 kfree(hwif->sg_table);
353 unregister_blkdev(hwif->major, hwif->name);
354 spin_lock_irq(&ide_lock);
355
Bartlomiej Zolnierkiewicz93de00f2008-04-18 00:46:24 +0200356 if (hwif->dma_base)
Bartlomiej Zolnierkiewicz0d1bad22008-04-26 22:25:19 +0200357 ide_release_dma_engine(hwif);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700358
Linus Torvalds1da177e2005-04-16 15:20:36 -0700359 /* restore hwif data to pristine status */
Bartlomiej Zolnierkiewicz387750c2008-04-27 15:38:31 +0200360 ide_init_port_data(hwif, hwif->index);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700361
Linus Torvalds1da177e2005-04-16 15:20:36 -0700362abort:
363 spin_unlock_irq(&ide_lock);
Matthias Kaehlckeef298882007-07-09 23:17:55 +0200364 mutex_unlock(&ide_cfg_mtx);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700365}
366
367EXPORT_SYMBOL(ide_unregister);
368
Bartlomiej Zolnierkiewicz57c802e2008-01-26 20:13:05 +0100369void ide_init_port_hw(ide_hwif_t *hwif, hw_regs_t *hw)
370{
Bartlomiej Zolnierkiewicz4c3032d2008-04-27 15:38:32 +0200371 memcpy(&hwif->io_ports, &hw->io_ports, sizeof(hwif->io_ports));
Bartlomiej Zolnierkiewicz57c802e2008-01-26 20:13:05 +0100372 hwif->irq = hw->irq;
Bartlomiej Zolnierkiewicz57c802e2008-01-26 20:13:05 +0100373 hwif->chipset = hw->chipset;
374 hwif->gendev.parent = hw->dev;
375 hwif->ack_intr = hw->ack_intr;
376}
377EXPORT_SYMBOL_GPL(ide_init_port_hw);
378
Linus Torvalds1da177e2005-04-16 15:20:36 -0700379/*
380 * Locks for IDE setting functionality
381 */
382
Matthias Kaehlckef9383c42007-07-09 23:17:56 +0200383DEFINE_MUTEX(ide_setting_mtx);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700384
Matthias Kaehlckef9383c42007-07-09 23:17:56 +0200385EXPORT_SYMBOL_GPL(ide_setting_mtx);
Bartlomiej Zolnierkiewicz14979432007-05-10 00:01:10 +0200386
Linus Torvalds1da177e2005-04-16 15:20:36 -0700387/**
Linus Torvalds1da177e2005-04-16 15:20:36 -0700388 * ide_spin_wait_hwgroup - wait for group
389 * @drive: drive in the group
390 *
391 * Wait for an IDE device group to go non busy and then return
392 * holding the ide_lock which guards the hwgroup->busy status
393 * and right to use it.
394 */
395
396int ide_spin_wait_hwgroup (ide_drive_t *drive)
397{
398 ide_hwgroup_t *hwgroup = HWGROUP(drive);
399 unsigned long timeout = jiffies + (3 * HZ);
400
401 spin_lock_irq(&ide_lock);
402
403 while (hwgroup->busy) {
404 unsigned long lflags;
405 spin_unlock_irq(&ide_lock);
406 local_irq_set(lflags);
407 if (time_after(jiffies, timeout)) {
408 local_irq_restore(lflags);
409 printk(KERN_ERR "%s: channel busy\n", drive->name);
410 return -EBUSY;
411 }
412 local_irq_restore(lflags);
413 spin_lock_irq(&ide_lock);
414 }
415 return 0;
416}
417
418EXPORT_SYMBOL(ide_spin_wait_hwgroup);
419
Bartlomiej Zolnierkiewicz7662d042007-05-10 00:01:10 +0200420int set_io_32bit(ide_drive_t *drive, int arg)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700421{
Bartlomiej Zolnierkiewicz14979432007-05-10 00:01:10 +0200422 if (drive->no_io_32bit)
423 return -EPERM;
424
425 if (arg < 0 || arg > 1 + (SUPPORT_VLB_SYNC << 1))
426 return -EINVAL;
427
Bartlomiej Zolnierkiewicz644a9d72007-12-12 23:32:00 +0100428 if (ide_spin_wait_hwgroup(drive))
429 return -EBUSY;
430
Linus Torvalds1da177e2005-04-16 15:20:36 -0700431 drive->io_32bit = arg;
Bartlomiej Zolnierkiewicz644a9d72007-12-12 23:32:00 +0100432
433 spin_unlock_irq(&ide_lock);
434
Linus Torvalds1da177e2005-04-16 15:20:36 -0700435 return 0;
436}
437
Bartlomiej Zolnierkiewicz14979432007-05-10 00:01:10 +0200438static int set_ksettings(ide_drive_t *drive, int arg)
439{
440 if (arg < 0 || arg > 1)
441 return -EINVAL;
442
443 if (ide_spin_wait_hwgroup(drive))
444 return -EBUSY;
445 drive->keep_settings = arg;
446 spin_unlock_irq(&ide_lock);
447
448 return 0;
449}
450
Bartlomiej Zolnierkiewicz7662d042007-05-10 00:01:10 +0200451int set_using_dma(ide_drive_t *drive, int arg)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700452{
453#ifdef CONFIG_BLK_DEV_IDEDMA
Bartlomiej Zolnierkiewicz87996202007-03-26 23:03:19 +0200454 ide_hwif_t *hwif = drive->hwif;
455 int err = -EPERM;
456
Bartlomiej Zolnierkiewicz14979432007-05-10 00:01:10 +0200457 if (arg < 0 || arg > 1)
458 return -EINVAL;
459
Linus Torvalds1da177e2005-04-16 15:20:36 -0700460 if (!drive->id || !(drive->id->capability & 1))
Bartlomiej Zolnierkiewicz87996202007-03-26 23:03:19 +0200461 goto out;
462
Bartlomiej Zolnierkiewicz5e37bdc2008-04-26 22:25:24 +0200463 if (hwif->dma_ops == NULL)
Bartlomiej Zolnierkiewicz87996202007-03-26 23:03:19 +0200464 goto out;
465
466 err = -EBUSY;
467 if (ide_spin_wait_hwgroup(drive))
468 goto out;
469 /*
470 * set ->busy flag, unlock and let it ride
471 */
472 hwif->hwgroup->busy = 1;
473 spin_unlock_irq(&ide_lock);
474
475 err = 0;
476
Linus Torvalds1da177e2005-04-16 15:20:36 -0700477 if (arg) {
Bartlomiej Zolnierkiewicz23b1bd42008-01-25 22:17:19 +0100478 if (ide_set_dma(drive))
Bartlomiej Zolnierkiewicz87996202007-03-26 23:03:19 +0200479 err = -EIO;
Bartlomiej Zolnierkiewicz7469aaf2007-02-17 02:40:26 +0100480 } else
481 ide_dma_off(drive);
Bartlomiej Zolnierkiewicz87996202007-03-26 23:03:19 +0200482
483 /*
484 * lock, clear ->busy flag and unlock before leaving
485 */
486 spin_lock_irq(&ide_lock);
487 hwif->hwgroup->busy = 0;
488 spin_unlock_irq(&ide_lock);
489out:
490 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700491#else
Bartlomiej Zolnierkiewicz14979432007-05-10 00:01:10 +0200492 if (arg < 0 || arg > 1)
493 return -EINVAL;
494
Linus Torvalds1da177e2005-04-16 15:20:36 -0700495 return -EPERM;
496#endif
497}
498
Bartlomiej Zolnierkiewicz7662d042007-05-10 00:01:10 +0200499int set_pio_mode(ide_drive_t *drive, int arg)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700500{
501 struct request rq;
Bartlomiej Zolnierkiewicz784506c2008-04-26 17:36:43 +0200502 ide_hwif_t *hwif = drive->hwif;
Bartlomiej Zolnierkiewiczac95bee2008-04-26 22:25:14 +0200503 const struct ide_port_ops *port_ops = hwif->port_ops;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700504
Bartlomiej Zolnierkiewicz14979432007-05-10 00:01:10 +0200505 if (arg < 0 || arg > 255)
506 return -EINVAL;
507
Bartlomiej Zolnierkiewiczac95bee2008-04-26 22:25:14 +0200508 if (port_ops == NULL || port_ops->set_pio_mode == NULL ||
Bartlomiej Zolnierkiewicz784506c2008-04-26 17:36:43 +0200509 (hwif->host_flags & IDE_HFLAG_NO_SET_MODE))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700510 return -ENOSYS;
Bartlomiej Zolnierkiewicz26bcb872007-10-11 23:54:00 +0200511
Linus Torvalds1da177e2005-04-16 15:20:36 -0700512 if (drive->special.b.set_tune)
513 return -EBUSY;
Bartlomiej Zolnierkiewicz145b75e2008-01-26 20:13:11 +0100514
Linus Torvalds1da177e2005-04-16 15:20:36 -0700515 ide_init_drive_cmd(&rq);
Bartlomiej Zolnierkiewicz852738f2008-01-26 20:13:12 +0100516 rq.cmd_type = REQ_TYPE_ATA_TASKFILE;
Bartlomiej Zolnierkiewicz145b75e2008-01-26 20:13:11 +0100517
Linus Torvalds1da177e2005-04-16 15:20:36 -0700518 drive->tune_req = (u8) arg;
519 drive->special.b.set_tune = 1;
520 (void) ide_do_drive_cmd(drive, &rq, ide_wait);
521 return 0;
522}
523
Bartlomiej Zolnierkiewicz14979432007-05-10 00:01:10 +0200524static int set_unmaskirq(ide_drive_t *drive, int arg)
525{
526 if (drive->no_unmask)
527 return -EPERM;
528
529 if (arg < 0 || arg > 1)
530 return -EINVAL;
531
532 if (ide_spin_wait_hwgroup(drive))
533 return -EBUSY;
534 drive->unmask = arg;
535 spin_unlock_irq(&ide_lock);
536
537 return 0;
538}
539
Linus Torvalds1da177e2005-04-16 15:20:36 -0700540/**
541 * system_bus_clock - clock guess
542 *
543 * External version of the bus clock guess used by very old IDE drivers
544 * for things like VLB timings. Should not be used.
545 */
546
547int system_bus_clock (void)
548{
Bartlomiej Zolnierkiewicz537f06c2008-02-01 23:09:35 +0100549 return system_bus_speed;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700550}
551
552EXPORT_SYMBOL(system_bus_clock);
553
David Brownellb887d2e2006-08-14 23:11:05 -0700554static int generic_ide_suspend(struct device *dev, pm_message_t mesg)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700555{
556 ide_drive_t *drive = dev->driver_data;
Hannes Reineckee3a59b42007-02-07 18:19:37 +0100557 ide_hwif_t *hwif = HWIF(drive);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700558 struct request rq;
559 struct request_pm_state rqpm;
560 ide_task_t args;
Shaohua Li5e321322007-10-11 23:53:58 +0200561 int ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700562
Hannes Reineckee3a59b42007-02-07 18:19:37 +0100563 /* Call ACPI _GTM only once */
564 if (!(drive->dn % 2))
565 ide_acpi_get_timing(hwif);
566
FUJITA Tomonorie7b241a2008-04-29 09:54:38 +0200567 blk_rq_init(NULL, &rq);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700568 memset(&rqpm, 0, sizeof(rqpm));
569 memset(&args, 0, sizeof(args));
Jens Axboe4aff5e22006-08-10 08:44:47 +0200570 rq.cmd_type = REQ_TYPE_PM_SUSPEND;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700571 rq.special = &args;
Jens Axboec00895a2006-09-30 20:29:12 +0200572 rq.data = &rqpm;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700573 rqpm.pm_step = ide_pm_state_start_suspend;
David Brownellb887d2e2006-08-14 23:11:05 -0700574 if (mesg.event == PM_EVENT_PRETHAW)
575 mesg.event = PM_EVENT_FREEZE;
576 rqpm.pm_state = mesg.event;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700577
Shaohua Li5e321322007-10-11 23:53:58 +0200578 ret = ide_do_drive_cmd(drive, &rq, ide_wait);
579 /* only call ACPI _PS3 after both drivers are suspended */
580 if (!ret && (((drive->dn % 2) && hwif->drives[0].present
581 && hwif->drives[1].present)
582 || !hwif->drives[0].present
583 || !hwif->drives[1].present))
584 ide_acpi_set_state(hwif, 0);
585 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700586}
587
588static int generic_ide_resume(struct device *dev)
589{
590 ide_drive_t *drive = dev->driver_data;
Hannes Reineckee3a59b42007-02-07 18:19:37 +0100591 ide_hwif_t *hwif = HWIF(drive);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700592 struct request rq;
593 struct request_pm_state rqpm;
594 ide_task_t args;
Lee Trager0d2157f2007-06-08 15:14:30 +0200595 int err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700596
Hannes Reineckee3a59b42007-02-07 18:19:37 +0100597 /* Call ACPI _STM only once */
Shaohua Li5e321322007-10-11 23:53:58 +0200598 if (!(drive->dn % 2)) {
599 ide_acpi_set_state(hwif, 1);
Hannes Reineckee3a59b42007-02-07 18:19:37 +0100600 ide_acpi_push_timing(hwif);
Shaohua Li5e321322007-10-11 23:53:58 +0200601 }
Hannes Reineckee3a59b42007-02-07 18:19:37 +0100602
603 ide_acpi_exec_tfs(drive);
604
FUJITA Tomonorie7b241a2008-04-29 09:54:38 +0200605 blk_rq_init(NULL, &rq);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700606 memset(&rqpm, 0, sizeof(rqpm));
607 memset(&args, 0, sizeof(args));
Jens Axboe4aff5e22006-08-10 08:44:47 +0200608 rq.cmd_type = REQ_TYPE_PM_RESUME;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700609 rq.special = &args;
Jens Axboec00895a2006-09-30 20:29:12 +0200610 rq.data = &rqpm;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700611 rqpm.pm_step = ide_pm_state_start_resume;
Pavel Machekca078ba2005-09-03 15:56:57 -0700612 rqpm.pm_state = PM_EVENT_ON;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700613
Lee Trager0d2157f2007-06-08 15:14:30 +0200614 err = ide_do_drive_cmd(drive, &rq, ide_head_wait);
615
Rafael J. Wysockice9b2b02007-06-16 02:24:43 +0200616 if (err == 0 && dev->driver) {
617 ide_driver_t *drv = to_ide_driver(dev->driver);
618
619 if (drv->resume)
620 drv->resume(drive);
621 }
Lee Trager0d2157f2007-06-08 15:14:30 +0200622
623 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700624}
625
626int generic_ide_ioctl(ide_drive_t *drive, struct file *file, struct block_device *bdev,
627 unsigned int cmd, unsigned long arg)
628{
Bartlomiej Zolnierkiewicz14979432007-05-10 00:01:10 +0200629 unsigned long flags;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700630 ide_driver_t *drv;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700631 void __user *p = (void __user *)arg;
Linus Torvalds19850262007-07-17 15:57:42 -0700632 int err = 0, (*setfunc)(ide_drive_t *, int);
Bartlomiej Zolnierkiewicz14979432007-05-10 00:01:10 +0200633 u8 *val;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700634
Bartlomiej Zolnierkiewicz14979432007-05-10 00:01:10 +0200635 switch (cmd) {
636 case HDIO_GET_32BIT: val = &drive->io_32bit; goto read_val;
637 case HDIO_GET_KEEPSETTINGS: val = &drive->keep_settings; goto read_val;
638 case HDIO_GET_UNMASKINTR: val = &drive->unmask; goto read_val;
639 case HDIO_GET_DMA: val = &drive->using_dma; goto read_val;
640 case HDIO_SET_32BIT: setfunc = set_io_32bit; goto set_val;
641 case HDIO_SET_KEEPSETTINGS: setfunc = set_ksettings; goto set_val;
642 case HDIO_SET_PIO_MODE: setfunc = set_pio_mode; goto set_val;
643 case HDIO_SET_UNMASKINTR: setfunc = set_unmaskirq; goto set_val;
644 case HDIO_SET_DMA: setfunc = set_using_dma; goto set_val;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700645 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700646
647 switch (cmd) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700648 case HDIO_OBSOLETE_IDENTITY:
649 case HDIO_GET_IDENTITY:
650 if (bdev != bdev->bd_contains)
651 return -EINVAL;
652 if (drive->id_read == 0)
653 return -ENOMSG;
654 if (copy_to_user(p, drive->id, (cmd == HDIO_GET_IDENTITY) ? sizeof(*drive->id) : 142))
655 return -EFAULT;
656 return 0;
657
658 case HDIO_GET_NICE:
659 return put_user(drive->dsc_overlap << IDE_NICE_DSC_OVERLAP |
660 drive->atapi_overlap << IDE_NICE_ATAPI_OVERLAP |
Bartlomiej Zolnierkiewicz92b83c82008-02-02 19:56:45 +0100661 drive->nice1 << IDE_NICE_1,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700662 (long __user *) arg);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700663#ifdef CONFIG_IDE_TASK_IOCTL
664 case HDIO_DRIVE_TASKFILE:
665 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
666 return -EACCES;
667 switch(drive->media) {
668 case ide_disk:
669 return ide_taskfile_ioctl(drive, cmd, arg);
670 default:
671 return -ENOMSG;
672 }
673#endif /* CONFIG_IDE_TASK_IOCTL */
674
675 case HDIO_DRIVE_CMD:
676 if (!capable(CAP_SYS_RAWIO))
677 return -EACCES;
678 return ide_cmd_ioctl(drive, cmd, arg);
679
680 case HDIO_DRIVE_TASK:
681 if (!capable(CAP_SYS_RAWIO))
682 return -EACCES;
683 return ide_task_ioctl(drive, cmd, arg);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700684 case HDIO_SET_NICE:
685 if (!capable(CAP_SYS_ADMIN)) return -EACCES;
686 if (arg != (arg & ((1 << IDE_NICE_DSC_OVERLAP) | (1 << IDE_NICE_1))))
687 return -EPERM;
688 drive->dsc_overlap = (arg >> IDE_NICE_DSC_OVERLAP) & 1;
689 drv = *(ide_driver_t **)bdev->bd_disk->private_data;
690 if (drive->dsc_overlap && !drv->supports_dsc_overlap) {
691 drive->dsc_overlap = 0;
692 return -EPERM;
693 }
694 drive->nice1 = (arg >> IDE_NICE_1) & 1;
695 return 0;
696 case HDIO_DRIVE_RESET:
Bartlomiej Zolnierkiewiczdbecebc2008-02-26 21:50:35 +0100697 if (!capable(CAP_SYS_ADMIN))
698 return -EACCES;
699
Linus Torvalds1da177e2005-04-16 15:20:36 -0700700 /*
701 * Abort the current command on the
702 * group if there is one, taking
703 * care not to allow anything else
704 * to be queued and to die on the
705 * spot if we miss one somehow
706 */
707
708 spin_lock_irqsave(&ide_lock, flags);
709
Alan Cox913759a2006-10-03 01:14:33 -0700710 if (HWGROUP(drive)->resetting) {
711 spin_unlock_irqrestore(&ide_lock, flags);
712 return -EBUSY;
713 }
714
Linus Torvalds1da177e2005-04-16 15:20:36 -0700715 ide_abort(drive, "drive reset");
716
Eric Sesterhenn125e1872006-06-23 02:06:06 -0700717 BUG_ON(HWGROUP(drive)->handler);
Bartlomiej Zolnierkiewiczdbecebc2008-02-26 21:50:35 +0100718
Linus Torvalds1da177e2005-04-16 15:20:36 -0700719 /* Ensure nothing gets queued after we
720 drop the lock. Reset will clear the busy */
Bartlomiej Zolnierkiewiczdbecebc2008-02-26 21:50:35 +0100721
Linus Torvalds1da177e2005-04-16 15:20:36 -0700722 HWGROUP(drive)->busy = 1;
723 spin_unlock_irqrestore(&ide_lock, flags);
724 (void) ide_do_reset(drive);
725
726 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700727 case HDIO_GET_BUSSTATE:
728 if (!capable(CAP_SYS_ADMIN))
729 return -EACCES;
730 if (put_user(HWIF(drive)->bus_state, (long __user *)arg))
731 return -EFAULT;
732 return 0;
733
734 case HDIO_SET_BUSSTATE:
735 if (!capable(CAP_SYS_ADMIN))
736 return -EACCES;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700737 return -EOPNOTSUPP;
738 default:
739 return -EINVAL;
740 }
Bartlomiej Zolnierkiewicz14979432007-05-10 00:01:10 +0200741
742read_val:
Matthias Kaehlckef9383c42007-07-09 23:17:56 +0200743 mutex_lock(&ide_setting_mtx);
Bartlomiej Zolnierkiewicz14979432007-05-10 00:01:10 +0200744 spin_lock_irqsave(&ide_lock, flags);
745 err = *val;
746 spin_unlock_irqrestore(&ide_lock, flags);
Matthias Kaehlckef9383c42007-07-09 23:17:56 +0200747 mutex_unlock(&ide_setting_mtx);
Bartlomiej Zolnierkiewicz14979432007-05-10 00:01:10 +0200748 return err >= 0 ? put_user(err, (long __user *)arg) : err;
749
750set_val:
751 if (bdev != bdev->bd_contains)
752 err = -EINVAL;
753 else {
754 if (!capable(CAP_SYS_ADMIN))
755 err = -EACCES;
756 else {
Matthias Kaehlckef9383c42007-07-09 23:17:56 +0200757 mutex_lock(&ide_setting_mtx);
Bartlomiej Zolnierkiewicz14979432007-05-10 00:01:10 +0200758 err = setfunc(drive, arg);
Matthias Kaehlckef9383c42007-07-09 23:17:56 +0200759 mutex_unlock(&ide_setting_mtx);
Bartlomiej Zolnierkiewicz14979432007-05-10 00:01:10 +0200760 }
761 }
762 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700763}
764
765EXPORT_SYMBOL(generic_ide_ioctl);
766
767/*
768 * stridx() returns the offset of c within s,
769 * or -1 if c is '\0' or not found within s.
770 */
771static int __init stridx (const char *s, char c)
772{
773 char *i = strchr(s, c);
774 return (i && c) ? i - s : -1;
775}
776
777/*
778 * match_parm() does parsing for ide_setup():
779 *
780 * 1. the first char of s must be '='.
781 * 2. if the remainder matches one of the supplied keywords,
782 * the index (1 based) of the keyword is negated and returned.
783 * 3. if the remainder is a series of no more than max_vals numbers
784 * separated by commas, the numbers are saved in vals[] and a
785 * count of how many were saved is returned. Base10 is assumed,
786 * and base16 is allowed when prefixed with "0x".
787 * 4. otherwise, zero is returned.
788 */
789static int __init match_parm (char *s, const char *keywords[], int vals[], int max_vals)
790{
791 static const char *decimal = "0123456789";
792 static const char *hex = "0123456789abcdef";
793 int i, n;
794
795 if (*s++ == '=') {
796 /*
797 * Try matching against the supplied keywords,
798 * and return -(index+1) if we match one
799 */
800 if (keywords != NULL) {
801 for (i = 0; *keywords != NULL; ++i) {
802 if (!strcmp(s, *keywords++))
803 return -(i+1);
804 }
805 }
806 /*
807 * Look for a series of no more than "max_vals"
808 * numeric values separated by commas, in base10,
809 * or base16 when prefixed with "0x".
810 * Return a count of how many were found.
811 */
812 for (n = 0; (i = stridx(decimal, *s)) >= 0;) {
813 vals[n] = i;
814 while ((i = stridx(decimal, *++s)) >= 0)
815 vals[n] = (vals[n] * 10) + i;
816 if (*s == 'x' && !vals[n]) {
817 while ((i = stridx(hex, *++s)) >= 0)
818 vals[n] = (vals[n] * 0x10) + i;
819 }
820 if (++n == max_vals)
821 break;
822 if (*s == ',' || *s == ';')
823 ++s;
824 }
825 if (!*s)
826 return n;
827 }
828 return 0; /* zero = nothing matched */
829}
830
Linus Torvalds1da177e2005-04-16 15:20:36 -0700831/*
832 * ide_setup() gets called VERY EARLY during initialization,
833 * to handle kernel "command line" strings beginning with "hdx=" or "ide".
834 *
Randy Dunlap1c10e932008-03-07 21:53:50 +0100835 * Remember to update Documentation/ide/ide.txt if you change something here.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700836 */
837static int __init ide_setup(char *s)
838{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700839 ide_hwif_t *hwif;
840 ide_drive_t *drive;
841 unsigned int hw, unit;
Bartlomiej Zolnierkiewiczef87f8d2008-04-27 15:38:24 +0200842 int vals[3];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700843 const char max_drive = 'a' + ((MAX_HWIFS * MAX_DRIVES) - 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700844
Linus Torvalds1da177e2005-04-16 15:20:36 -0700845 if (strncmp(s,"hd",2) == 0 && s[2] == '=') /* hd= is for hd.c */
846 return 0; /* driver and not us */
847
848 if (strncmp(s,"ide",3) && strncmp(s,"idebus",6) && strncmp(s,"hd",2))
849 return 0;
850
851 printk(KERN_INFO "ide_setup: %s", s);
852 init_ide_data ();
853
854#ifdef CONFIG_BLK_DEV_IDEDOUBLER
855 if (!strcmp(s, "ide=doubler")) {
856 extern int ide_doubler;
857
858 printk(" : Enabled support for IDE doublers\n");
859 ide_doubler = 1;
Bartlomiej Zolnierkiewicz9dcba7f2008-04-27 15:38:30 +0200860 goto obsolete_option;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700861 }
862#endif /* CONFIG_BLK_DEV_IDEDOUBLER */
863
864 if (!strcmp(s, "ide=nodma")) {
865 printk(" : Prevented DMA\n");
866 noautodma = 1;
Bartlomiej Zolnierkiewiczc2237012007-10-16 22:29:58 +0200867 goto obsolete_option;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700868 }
869
Hannes Reineckee3a59b42007-02-07 18:19:37 +0100870#ifdef CONFIG_BLK_DEV_IDEACPI
871 if (!strcmp(s, "ide=noacpi")) {
872 //printk(" : Disable IDE ACPI support.\n");
873 ide_noacpi = 1;
Bartlomiej Zolnierkiewicz1dbfeb42008-04-27 15:38:30 +0200874 goto obsolete_option;
Hannes Reineckee3a59b42007-02-07 18:19:37 +0100875 }
876 if (!strcmp(s, "ide=acpigtf")) {
877 //printk(" : Enable IDE ACPI _GTF support.\n");
Bartlomiej Zolnierkiewicz1dbfeb42008-04-27 15:38:30 +0200878 ide_acpigtf = 1;
879 goto obsolete_option;
Hannes Reineckee3a59b42007-02-07 18:19:37 +0100880 }
881 if (!strcmp(s, "ide=acpionboot")) {
882 //printk(" : Call IDE ACPI methods on boot.\n");
Bartlomiej Zolnierkiewicz1dbfeb42008-04-27 15:38:30 +0200883 ide_acpionboot = 1;
884 goto obsolete_option;
Hannes Reineckee3a59b42007-02-07 18:19:37 +0100885 }
886#endif /* CONFIG_BLK_DEV_IDEACPI */
887
Linus Torvalds1da177e2005-04-16 15:20:36 -0700888 /*
889 * Look for drive options: "hdx="
890 */
891 if (s[0] == 'h' && s[1] == 'd' && s[2] >= 'a' && s[2] <= max_drive) {
892 const char *hd_words[] = {
Bartlomiej Zolnierkiewiczc2237012007-10-16 22:29:58 +0200893 "none", "noprobe", "nowerr", "cdrom", "nodma",
Bartlomiej Zolnierkiewicz207daea2008-04-27 15:38:29 +0200894 "-6", "-7", "-8", "-9", "-10",
Jens Axboe36193482006-07-28 08:54:59 +0200895 "noflush", "remap", "remap63", "scsi", NULL };
Linus Torvalds1da177e2005-04-16 15:20:36 -0700896 unit = s[2] - 'a';
897 hw = unit / MAX_DRIVES;
898 unit = unit % MAX_DRIVES;
899 hwif = &ide_hwifs[hw];
900 drive = &hwif->drives[unit];
901 if (strncmp(s + 4, "ide-", 4) == 0) {
902 strlcpy(drive->driver_req, s + 4, sizeof(drive->driver_req));
Bartlomiej Zolnierkiewicz15220d92008-03-22 16:40:21 +0100903 goto obsolete_option;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700904 }
905 switch (match_parm(&s[3], hd_words, vals, 3)) {
906 case -1: /* "none" */
907 case -2: /* "noprobe" */
908 drive->noprobe = 1;
Bartlomiej Zolnierkiewicz6e875432008-04-27 15:38:30 +0200909 goto obsolete_option;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700910 case -3: /* "nowerr" */
911 drive->bad_wstat = BAD_R_STAT;
Bartlomiej Zolnierkiewicz6e875432008-04-27 15:38:30 +0200912 goto obsolete_option;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700913 case -4: /* "cdrom" */
914 drive->present = 1;
915 drive->media = ide_cdrom;
916 /* an ATAPI device ignores DRDY */
917 drive->ready_stat = 0;
Bartlomiej Zolnierkiewicz4706a7e2008-04-27 15:38:30 +0200918 goto obsolete_option;
Bartlomiej Zolnierkiewiczc2237012007-10-16 22:29:58 +0200919 case -5: /* nodma */
920 drive->nodma = 1;
Bartlomiej Zolnierkiewicz6e875432008-04-27 15:38:30 +0200921 goto obsolete_option;
Jens Axboe36193482006-07-28 08:54:59 +0200922 case -11: /* noflush */
923 drive->noflush = 1;
Bartlomiej Zolnierkiewicz6e875432008-04-27 15:38:30 +0200924 goto obsolete_option;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700925 case -12: /* "remap" */
926 drive->remap_0_to_1 = 1;
Bartlomiej Zolnierkiewiczd708c402008-03-22 16:40:22 +0100927 goto obsolete_option;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700928 case -13: /* "remap63" */
929 drive->sect0 = 63;
Bartlomiej Zolnierkiewiczd708c402008-03-22 16:40:22 +0100930 goto obsolete_option;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700931 case -14: /* "scsi" */
932 drive->scsi = 1;
Bartlomiej Zolnierkiewicz15220d92008-03-22 16:40:21 +0100933 goto obsolete_option;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700934 case 3: /* cyl,head,sect */
935 drive->media = ide_disk;
936 drive->ready_stat = READY_STAT;
937 drive->cyl = drive->bios_cyl = vals[0];
938 drive->head = drive->bios_head = vals[1];
939 drive->sect = drive->bios_sect = vals[2];
940 drive->present = 1;
941 drive->forced_geom = 1;
Bartlomiej Zolnierkiewicz4706a7e2008-04-27 15:38:30 +0200942 goto obsolete_option;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700943 default:
944 goto bad_option;
945 }
946 }
947
948 if (s[0] != 'i' || s[1] != 'd' || s[2] != 'e')
949 goto bad_option;
950 /*
951 * Look for bus speed option: "idebus="
952 */
953 if (s[3] == 'b' && s[4] == 'u' && s[5] == 's') {
954 if (match_parm(&s[6], NULL, vals, 1) != 1)
955 goto bad_option;
956 if (vals[0] >= 20 && vals[0] <= 66) {
957 idebus_parameter = vals[0];
958 } else
959 printk(" -- BAD BUS SPEED! Expected value from 20 to 66");
Bartlomiej Zolnierkiewicz73f1ad82008-04-27 15:38:29 +0200960 goto obsolete_option;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700961 }
Bartlomiej Zolnierkiewicz9239b332007-10-20 00:32:33 +0200962
Linus Torvalds1da177e2005-04-16 15:20:36 -0700963bad_option:
964 printk(" -- BAD OPTION\n");
965 return 1;
966obsolete_option:
967 printk(" -- OBSOLETE OPTION, WILL BE REMOVED SOON!\n");
968 return 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700969}
970
Linus Torvalds1da177e2005-04-16 15:20:36 -0700971EXPORT_SYMBOL(ide_lock);
972
Bartlomiej Zolnierkiewicz8604aff2005-05-26 14:55:34 +0200973static int ide_bus_match(struct device *dev, struct device_driver *drv)
974{
975 return 1;
976}
977
Kay Sievers263756e2005-12-12 18:03:44 +0100978static char *media_string(ide_drive_t *drive)
979{
980 switch (drive->media) {
981 case ide_disk:
982 return "disk";
983 case ide_cdrom:
984 return "cdrom";
985 case ide_tape:
986 return "tape";
987 case ide_floppy:
988 return "floppy";
Danny Kukawkaa7a832d2007-04-10 22:39:14 +0200989 case ide_optical:
990 return "optical";
Kay Sievers263756e2005-12-12 18:03:44 +0100991 default:
992 return "UNKNOWN";
993 }
994}
995
996static ssize_t media_show(struct device *dev, struct device_attribute *attr, char *buf)
997{
998 ide_drive_t *drive = to_ide_device(dev);
999 return sprintf(buf, "%s\n", media_string(drive));
1000}
1001
1002static ssize_t drivename_show(struct device *dev, struct device_attribute *attr, char *buf)
1003{
1004 ide_drive_t *drive = to_ide_device(dev);
1005 return sprintf(buf, "%s\n", drive->name);
1006}
1007
1008static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf)
1009{
1010 ide_drive_t *drive = to_ide_device(dev);
1011 return sprintf(buf, "ide:m-%s\n", media_string(drive));
1012}
1013
Bartlomiej Zolnierkiewicze11b9032007-12-12 23:31:58 +01001014static ssize_t model_show(struct device *dev, struct device_attribute *attr,
1015 char *buf)
1016{
1017 ide_drive_t *drive = to_ide_device(dev);
1018 return sprintf(buf, "%s\n", drive->id->model);
1019}
1020
1021static ssize_t firmware_show(struct device *dev, struct device_attribute *attr,
1022 char *buf)
1023{
1024 ide_drive_t *drive = to_ide_device(dev);
1025 return sprintf(buf, "%s\n", drive->id->fw_rev);
1026}
1027
1028static ssize_t serial_show(struct device *dev, struct device_attribute *attr,
1029 char *buf)
1030{
1031 ide_drive_t *drive = to_ide_device(dev);
1032 return sprintf(buf, "%s\n", drive->id->serial_no);
1033}
1034
Kay Sievers263756e2005-12-12 18:03:44 +01001035static struct device_attribute ide_dev_attrs[] = {
1036 __ATTR_RO(media),
1037 __ATTR_RO(drivename),
1038 __ATTR_RO(modalias),
Bartlomiej Zolnierkiewicze11b9032007-12-12 23:31:58 +01001039 __ATTR_RO(model),
1040 __ATTR_RO(firmware),
1041 __ATTR(serial, 0400, serial_show, NULL),
Kay Sievers263756e2005-12-12 18:03:44 +01001042 __ATTR_NULL
1043};
1044
Kay Sievers7eff2e72007-08-14 15:15:12 +02001045static int ide_uevent(struct device *dev, struct kobj_uevent_env *env)
Kay Sievers263756e2005-12-12 18:03:44 +01001046{
1047 ide_drive_t *drive = to_ide_device(dev);
Kay Sievers263756e2005-12-12 18:03:44 +01001048
Kay Sievers7eff2e72007-08-14 15:15:12 +02001049 add_uevent_var(env, "MEDIA=%s", media_string(drive));
1050 add_uevent_var(env, "DRIVENAME=%s", drive->name);
1051 add_uevent_var(env, "MODALIAS=ide:m-%s", media_string(drive));
Kay Sievers263756e2005-12-12 18:03:44 +01001052 return 0;
1053}
1054
Russell King4031bbe2006-01-06 11:41:00 +00001055static int generic_ide_probe(struct device *dev)
1056{
1057 ide_drive_t *drive = to_ide_device(dev);
1058 ide_driver_t *drv = to_ide_driver(dev->driver);
1059
1060 return drv->probe ? drv->probe(drive) : -ENODEV;
1061}
1062
1063static int generic_ide_remove(struct device *dev)
1064{
1065 ide_drive_t *drive = to_ide_device(dev);
1066 ide_driver_t *drv = to_ide_driver(dev->driver);
1067
1068 if (drv->remove)
1069 drv->remove(drive);
1070
1071 return 0;
1072}
1073
1074static void generic_ide_shutdown(struct device *dev)
1075{
1076 ide_drive_t *drive = to_ide_device(dev);
1077 ide_driver_t *drv = to_ide_driver(dev->driver);
1078
1079 if (dev->driver && drv->shutdown)
1080 drv->shutdown(drive);
1081}
1082
Linus Torvalds1da177e2005-04-16 15:20:36 -07001083struct bus_type ide_bus_type = {
1084 .name = "ide",
Bartlomiej Zolnierkiewicz8604aff2005-05-26 14:55:34 +02001085 .match = ide_bus_match,
Kay Sievers263756e2005-12-12 18:03:44 +01001086 .uevent = ide_uevent,
Russell King4031bbe2006-01-06 11:41:00 +00001087 .probe = generic_ide_probe,
1088 .remove = generic_ide_remove,
1089 .shutdown = generic_ide_shutdown,
Kay Sievers263756e2005-12-12 18:03:44 +01001090 .dev_attrs = ide_dev_attrs,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001091 .suspend = generic_ide_suspend,
1092 .resume = generic_ide_resume,
1093};
1094
Bartlomiej Zolnierkiewicz8604aff2005-05-26 14:55:34 +02001095EXPORT_SYMBOL_GPL(ide_bus_type);
1096
Bartlomiej Zolnierkiewiczf74c9142008-04-18 00:46:23 +02001097static void ide_port_class_release(struct device *portdev)
1098{
1099 ide_hwif_t *hwif = dev_get_drvdata(portdev);
1100
1101 put_device(&hwif->gendev);
1102}
1103
Bartlomiej Zolnierkiewiczebae41a2008-04-27 15:38:29 +02001104int ide_vlb_clk;
1105EXPORT_SYMBOL_GPL(ide_vlb_clk);
1106
1107module_param_named(vlb_clock, ide_vlb_clk, int, 0);
1108MODULE_PARM_DESC(vlb_clock, "VLB clock frequency (in MHz)");
1109
1110int ide_pci_clk;
1111EXPORT_SYMBOL_GPL(ide_pci_clk);
1112
1113module_param_named(pci_clock, ide_pci_clk, int, 0);
1114MODULE_PARM_DESC(pci_clock, "PCI bus clock frequency (in MHz)");
1115
Bartlomiej Zolnierkiewicz6e875432008-04-27 15:38:30 +02001116static int ide_set_dev_param_mask(const char *s, struct kernel_param *kp)
1117{
1118 int a, b, i, j = 1;
1119 unsigned int *dev_param_mask = (unsigned int *)kp->arg;
1120
1121 if (sscanf(s, "%d.%d:%d", &a, &b, &j) != 3 &&
1122 sscanf(s, "%d.%d", &a, &b) != 2)
1123 return -EINVAL;
1124
1125 i = a * MAX_DRIVES + b;
1126
1127 if (i >= MAX_HWIFS * MAX_DRIVES || j < 0 || j > 1)
1128 return -EINVAL;
1129
1130 if (j)
1131 *dev_param_mask |= (1 << i);
1132 else
1133 *dev_param_mask &= (1 << i);
1134
1135 return 0;
1136}
1137
1138static unsigned int ide_nodma;
1139
1140module_param_call(nodma, ide_set_dev_param_mask, NULL, &ide_nodma, 0);
1141MODULE_PARM_DESC(nodma, "disallow DMA for a device");
1142
1143static unsigned int ide_noflush;
1144
1145module_param_call(noflush, ide_set_dev_param_mask, NULL, &ide_noflush, 0);
1146MODULE_PARM_DESC(noflush, "disable flush requests for a device");
1147
1148static unsigned int ide_noprobe;
1149
1150module_param_call(noprobe, ide_set_dev_param_mask, NULL, &ide_noprobe, 0);
1151MODULE_PARM_DESC(noprobe, "skip probing for a device");
1152
1153static unsigned int ide_nowerr;
1154
1155module_param_call(nowerr, ide_set_dev_param_mask, NULL, &ide_nowerr, 0);
1156MODULE_PARM_DESC(nowerr, "ignore the WRERR_STAT bit for a device");
1157
Bartlomiej Zolnierkiewicz4706a7e2008-04-27 15:38:30 +02001158static unsigned int ide_cdroms;
1159
1160module_param_call(cdrom, ide_set_dev_param_mask, NULL, &ide_cdroms, 0);
1161MODULE_PARM_DESC(cdrom, "force device as a CD-ROM");
1162
1163struct chs_geom {
1164 unsigned int cyl;
1165 u8 head;
1166 u8 sect;
1167};
1168
1169static unsigned int ide_disks;
1170static struct chs_geom ide_disks_chs[MAX_HWIFS * MAX_DRIVES];
1171
1172static int ide_set_disk_chs(const char *str, struct kernel_param *kp)
1173{
1174 int a, b, c = 0, h = 0, s = 0, i, j = 1;
1175
1176 if (sscanf(str, "%d.%d:%d,%d,%d", &a, &b, &c, &h, &s) != 5 &&
1177 sscanf(str, "%d.%d:%d", &a, &b, &j) != 3)
1178 return -EINVAL;
1179
1180 i = a * MAX_DRIVES + b;
1181
1182 if (i >= MAX_HWIFS * MAX_DRIVES || j < 0 || j > 1)
1183 return -EINVAL;
1184
1185 if (c > INT_MAX || h > 255 || s > 255)
1186 return -EINVAL;
1187
1188 if (j)
1189 ide_disks |= (1 << i);
1190 else
1191 ide_disks &= (1 << i);
1192
1193 ide_disks_chs[i].cyl = c;
1194 ide_disks_chs[i].head = h;
1195 ide_disks_chs[i].sect = s;
1196
1197 return 0;
1198}
1199
1200module_param_call(chs, ide_set_disk_chs, NULL, NULL, 0);
1201MODULE_PARM_DESC(chs, "force device as a disk (using CHS)");
1202
Bartlomiej Zolnierkiewicz6e875432008-04-27 15:38:30 +02001203static void ide_dev_apply_params(ide_drive_t *drive)
1204{
1205 int i = drive->hwif->index * MAX_DRIVES + drive->select.b.unit;
1206
1207 if (ide_nodma & (1 << i)) {
1208 printk(KERN_INFO "ide: disallowing DMA for %s\n", drive->name);
1209 drive->nodma = 1;
1210 }
1211 if (ide_noflush & (1 << i)) {
1212 printk(KERN_INFO "ide: disabling flush requests for %s\n",
1213 drive->name);
1214 drive->noflush = 1;
1215 }
1216 if (ide_noprobe & (1 << i)) {
1217 printk(KERN_INFO "ide: skipping probe for %s\n", drive->name);
1218 drive->noprobe = 1;
1219 }
1220 if (ide_nowerr & (1 << i)) {
1221 printk(KERN_INFO "ide: ignoring the WRERR_STAT bit for %s\n",
1222 drive->name);
1223 drive->bad_wstat = BAD_R_STAT;
1224 }
Bartlomiej Zolnierkiewicz4706a7e2008-04-27 15:38:30 +02001225 if (ide_cdroms & (1 << i)) {
1226 printk(KERN_INFO "ide: forcing %s as a CD-ROM\n", drive->name);
1227 drive->present = 1;
1228 drive->media = ide_cdrom;
1229 /* an ATAPI device ignores DRDY */
1230 drive->ready_stat = 0;
1231 }
1232 if (ide_disks & (1 << i)) {
1233 drive->cyl = drive->bios_cyl = ide_disks_chs[i].cyl;
1234 drive->head = drive->bios_head = ide_disks_chs[i].head;
1235 drive->sect = drive->bios_sect = ide_disks_chs[i].sect;
1236 drive->forced_geom = 1;
1237 printk(KERN_INFO "ide: forcing %s as a disk (%d/%d/%d)\n",
1238 drive->name,
1239 drive->cyl, drive->head, drive->sect);
1240 drive->present = 1;
1241 drive->media = ide_disk;
1242 drive->ready_stat = READY_STAT;
1243 }
Bartlomiej Zolnierkiewicz6e875432008-04-27 15:38:30 +02001244}
1245
Bartlomiej Zolnierkiewicz9fd91d92008-04-27 15:38:23 +02001246static unsigned int ide_ignore_cable;
1247
1248static int ide_set_ignore_cable(const char *s, struct kernel_param *kp)
1249{
1250 int i, j = 1;
1251
1252 if (sscanf(s, "%d:%d", &i, &j) != 2 && sscanf(s, "%d", &i) != 1)
1253 return -EINVAL;
1254
1255 if (i >= MAX_HWIFS || j < 0 || j > 1)
1256 return -EINVAL;
1257
1258 if (j)
1259 ide_ignore_cable |= (1 << i);
1260 else
1261 ide_ignore_cable &= (1 << i);
1262
1263 return 0;
1264}
1265
1266module_param_call(ignore_cable, ide_set_ignore_cable, NULL, NULL, 0);
1267MODULE_PARM_DESC(ignore_cable, "ignore cable detection");
1268
1269void ide_port_apply_params(ide_hwif_t *hwif)
1270{
Bartlomiej Zolnierkiewicz6e875432008-04-27 15:38:30 +02001271 int i;
1272
Bartlomiej Zolnierkiewicz9fd91d92008-04-27 15:38:23 +02001273 if (ide_ignore_cable & (1 << hwif->index)) {
1274 printk(KERN_INFO "ide: ignoring cable detection for %s\n",
1275 hwif->name);
1276 hwif->cbl = ATA_CBL_PATA40_SHORT;
1277 }
Bartlomiej Zolnierkiewicz6e875432008-04-27 15:38:30 +02001278
1279 for (i = 0; i < MAX_DRIVES; i++)
1280 ide_dev_apply_params(&hwif->drives[i]);
Bartlomiej Zolnierkiewicz9fd91d92008-04-27 15:38:23 +02001281}
1282
Linus Torvalds1da177e2005-04-16 15:20:36 -07001283/*
1284 * This is gets invoked once during initialization, to set *everything* up
1285 */
1286static int __init ide_init(void)
1287{
Randy Dunlap349ae232006-10-03 01:14:23 -07001288 int ret;
1289
Bartlomiej Zolnierkiewiczeba8ff92008-02-11 00:32:13 +01001290 printk(KERN_INFO "Uniform Multi-Platform E-IDE driver\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001291 system_bus_speed = ide_system_bus_speed();
1292
Bartlomiej Zolnierkiewicz537f06c2008-02-01 23:09:35 +01001293 printk(KERN_INFO "ide: Assuming %dMHz system bus speed "
1294 "for PIO modes%s\n", system_bus_speed,
1295 idebus_parameter ? "" : "; override with idebus=xx");
1296
Randy Dunlap349ae232006-10-03 01:14:23 -07001297 ret = bus_register(&ide_bus_type);
1298 if (ret < 0) {
1299 printk(KERN_WARNING "IDE: bus_register error: %d\n", ret);
1300 return ret;
1301 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001302
Bartlomiej Zolnierkiewiczf74c9142008-04-18 00:46:23 +02001303 ide_port_class = class_create(THIS_MODULE, "ide_port");
1304 if (IS_ERR(ide_port_class)) {
1305 ret = PTR_ERR(ide_port_class);
1306 goto out_port_class;
1307 }
1308 ide_port_class->dev_release = ide_port_class_release;
1309
Linus Torvalds1da177e2005-04-16 15:20:36 -07001310 init_ide_data();
1311
Bartlomiej Zolnierkiewicz5cbf79c2007-05-10 00:01:11 +02001312 proc_ide_create();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001313
Linus Torvalds1da177e2005-04-16 15:20:36 -07001314 return 0;
Bartlomiej Zolnierkiewiczf74c9142008-04-18 00:46:23 +02001315
1316out_port_class:
1317 bus_unregister(&ide_bus_type);
1318
1319 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001320}
1321
1322#ifdef MODULE
1323static char *options = NULL;
1324module_param(options, charp, 0);
1325MODULE_LICENSE("GPL");
1326
1327static void __init parse_options (char *line)
1328{
1329 char *next = line;
1330
1331 if (line == NULL || !*line)
1332 return;
1333 while ((line = next) != NULL) {
1334 if ((next = strchr(line,' ')) != NULL)
1335 *next++ = 0;
1336 if (!ide_setup(line))
1337 printk (KERN_INFO "Unknown option '%s'\n", line);
1338 }
1339}
1340
Sam Ravnborgfbd8ad32006-03-25 03:07:11 -08001341int __init init_module (void)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001342{
1343 parse_options(options);
1344 return ide_init();
1345}
1346
Al Viroeb797222007-02-01 13:52:38 +00001347void __exit cleanup_module (void)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001348{
Linus Torvalds1da177e2005-04-16 15:20:36 -07001349 proc_ide_destroy();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001350
Bartlomiej Zolnierkiewiczf74c9142008-04-18 00:46:23 +02001351 class_destroy(ide_port_class);
1352
Linus Torvalds1da177e2005-04-16 15:20:36 -07001353 bus_unregister(&ide_bus_type);
1354}
1355
1356#else /* !MODULE */
1357
1358__setup("", ide_setup);
1359
1360module_init(ide_init);
1361
1362#endif /* MODULE */