blob: 27d5d6a1625f52e132dcd56410a86205c7bdfc97 [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)
Pavel Machekfc410692008-07-23 19:56:02 +02003 * Copyright (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#include <linux/module.h>
48#include <linux/types.h>
49#include <linux/string.h>
50#include <linux/kernel.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070051#include <linux/interrupt.h>
52#include <linux/major.h>
53#include <linux/errno.h>
54#include <linux/genhd.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070055#include <linux/slab.h>
56#include <linux/init.h>
57#include <linux/pci.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070058#include <linux/ide.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070059#include <linux/completion.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070060#include <linux/device.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070061
62
63/* default maximum number of failures */
64#define IDE_DEFAULT_MAX_FAILURES 1
65
Bartlomiej Zolnierkiewiczf74c9142008-04-18 00:46:23 +020066struct class *ide_port_class;
67
Linus Torvalds1da177e2005-04-16 15:20:36 -070068static const u8 ide_hwif_to_major[] = { IDE0_MAJOR, IDE1_MAJOR,
69 IDE2_MAJOR, IDE3_MAJOR,
70 IDE4_MAJOR, IDE5_MAJOR,
71 IDE6_MAJOR, IDE7_MAJOR,
72 IDE8_MAJOR, IDE9_MAJOR };
73
Matthias Kaehlckeef298882007-07-09 23:17:55 +020074DEFINE_MUTEX(ide_cfg_mtx);
Linus Torvalds1da177e2005-04-16 15:20:36 -070075
Bartlomiej Zolnierkiewicz931ee0d2008-07-15 21:21:47 +020076__cacheline_aligned_in_smp DEFINE_SPINLOCK(ide_lock);
77EXPORT_SYMBOL(ide_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -070078
Bartlomiej Zolnierkiewicz43514ed2008-04-18 00:46:22 +020079static void ide_port_init_devices_data(ide_hwif_t *);
80
Linus Torvalds1da177e2005-04-16 15:20:36 -070081/*
82 * Do not even *think* about calling this!
83 */
Bartlomiej Zolnierkiewiczcbb010c2008-01-26 20:13:06 +010084void ide_init_port_data(ide_hwif_t *hwif, unsigned int index)
Linus Torvalds1da177e2005-04-16 15:20:36 -070085{
Linus Torvalds1da177e2005-04-16 15:20:36 -070086 /* bulk initialize hwif & drive info with zeros */
87 memset(hwif, 0, sizeof(ide_hwif_t));
88
89 /* fill in any non-zero initial values */
90 hwif->index = index;
91 hwif->major = ide_hwif_to_major[index];
92
93 hwif->name[0] = 'i';
94 hwif->name[1] = 'd';
95 hwif->name[2] = 'e';
96 hwif->name[3] = '0' + index;
97
98 hwif->bus_state = BUSSTATE_ON;
99
Aleksey Makarovf36d4022006-01-09 15:59:27 -0800100 init_completion(&hwif->gendev_rel_comp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700101
Bartlomiej Zolnierkiewicz374e0422008-07-23 19:55:56 +0200102 hwif->tp_ops = &default_tp_ops;
Bartlomiej Zolnierkiewicz43514ed2008-04-18 00:46:22 +0200103
104 ide_port_init_devices_data(hwif);
105}
Bartlomiej Zolnierkiewicz43514ed2008-04-18 00:46:22 +0200106
107static void ide_port_init_devices_data(ide_hwif_t *hwif)
108{
109 int unit;
110
Linus Torvalds1da177e2005-04-16 15:20:36 -0700111 for (unit = 0; unit < MAX_DRIVES; ++unit) {
112 ide_drive_t *drive = &hwif->drives[unit];
Bartlomiej Zolnierkiewicz43514ed2008-04-18 00:46:22 +0200113 u8 j = (hwif->index * MAX_DRIVES) + unit;
114
115 memset(drive, 0, sizeof(*drive));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700116
117 drive->media = ide_disk;
118 drive->select.all = (unit<<4)|0xa0;
119 drive->hwif = hwif;
Bartlomiej Zolnierkiewicz3a7d2482008-10-10 22:39:21 +0200120 drive->ready_stat = ATA_DRDY;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700121 drive->bad_wstat = BAD_W_STAT;
122 drive->special.b.recalibrate = 1;
123 drive->special.b.set_geometry = 1;
124 drive->name[0] = 'h';
125 drive->name[1] = 'd';
Bartlomiej Zolnierkiewicz43514ed2008-04-18 00:46:22 +0200126 drive->name[2] = 'a' + j;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700127 drive->max_failures = IDE_DEFAULT_MAX_FAILURES;
Bartlomiej Zolnierkiewicz43514ed2008-04-18 00:46:22 +0200128
Linus Torvalds1da177e2005-04-16 15:20:36 -0700129 INIT_LIST_HEAD(&drive->list);
Aleksey Makarovf36d4022006-01-09 15:59:27 -0800130 init_completion(&drive->gendev_rel_comp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700131 }
132}
Bartlomiej Zolnierkiewicz43514ed2008-04-18 00:46:22 +0200133
Bartlomiej Zolnierkiewicz71bf9f62008-04-18 00:46:22 +0200134/* Called with ide_lock held. */
Bartlomiej Zolnierkiewicz2dde7862008-04-18 00:46:23 +0200135static void __ide_port_unregister_devices(ide_hwif_t *hwif)
Bartlomiej Zolnierkiewicz71bf9f62008-04-18 00:46:22 +0200136{
137 int i;
138
139 for (i = 0; i < MAX_DRIVES; i++) {
140 ide_drive_t *drive = &hwif->drives[i];
141
142 if (drive->present) {
143 spin_unlock_irq(&ide_lock);
144 device_unregister(&drive->gendev);
145 wait_for_completion(&drive->gendev_rel_comp);
146 spin_lock_irq(&ide_lock);
147 }
148 }
149}
150
Bartlomiej Zolnierkiewicz2dde7862008-04-18 00:46:23 +0200151void ide_port_unregister_devices(ide_hwif_t *hwif)
152{
153 mutex_lock(&ide_cfg_mtx);
154 spin_lock_irq(&ide_lock);
155 __ide_port_unregister_devices(hwif);
156 hwif->present = 0;
157 ide_port_init_devices_data(hwif);
158 spin_unlock_irq(&ide_lock);
159 mutex_unlock(&ide_cfg_mtx);
160}
161EXPORT_SYMBOL_GPL(ide_port_unregister_devices);
162
Linus Torvalds1da177e2005-04-16 15:20:36 -0700163/**
Sergei Shtylylov020e3222006-10-03 01:14:13 -0700164 * ide_unregister - free an IDE interface
Bartlomiej Zolnierkiewicz387750c2008-04-27 15:38:31 +0200165 * @hwif: IDE interface
Linus Torvalds1da177e2005-04-16 15:20:36 -0700166 *
167 * Perform the final unregister of an IDE interface. At the moment
168 * we don't refcount interfaces so this will also get split up.
169 *
170 * Locking:
171 * The caller must not hold the IDE locks
172 * The drive present/vanishing is not yet properly locked
173 * Take care with the callbacks. These have been split to avoid
174 * deadlocking the IDE layer. The shutdown callback is called
175 * before we take the lock and free resources. It is up to the
176 * caller to be sure there is no pending I/O here, and that
Sergei Shtylylov020e3222006-10-03 01:14:13 -0700177 * the interface will not be reopened (present/vanishing locking
178 * isn't yet done BTW). After we commit to the final kill we
Linus Torvalds1da177e2005-04-16 15:20:36 -0700179 * call the cleanup callback with the ide locks held.
180 *
181 * Unregister restores the hwif structures to the default state.
182 * This is raving bonkers.
183 */
184
Bartlomiej Zolnierkiewicz387750c2008-04-27 15:38:31 +0200185void ide_unregister(ide_hwif_t *hwif)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700186{
Bartlomiej Zolnierkiewicz387750c2008-04-27 15:38:31 +0200187 ide_hwif_t *g;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700188 ide_hwgroup_t *hwgroup;
Bartlomiej Zolnierkiewicz71bf9f62008-04-18 00:46:22 +0200189 int irq_count = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700190
Linus Torvalds1da177e2005-04-16 15:20:36 -0700191 BUG_ON(in_interrupt());
192 BUG_ON(irqs_disabled());
Linus Torvalds1da177e2005-04-16 15:20:36 -0700193
Bartlomiej Zolnierkiewiczbd8a59e2008-07-05 20:30:51 +0200194 mutex_lock(&ide_cfg_mtx);
195
196 spin_lock_irq(&ide_lock);
197 if (hwif->present) {
198 __ide_port_unregister_devices(hwif);
199 hwif->present = 0;
200 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700201 spin_unlock_irq(&ide_lock);
202
Bartlomiej Zolnierkiewicz5cbf79c2007-05-10 00:01:11 +0200203 ide_proc_unregister_port(hwif);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700204
205 hwgroup = hwif->hwgroup;
206 /*
207 * free the irq if we were the only hwif using it
208 */
209 g = hwgroup->hwif;
210 do {
211 if (g->irq == hwif->irq)
212 ++irq_count;
213 g = g->next;
214 } while (g != hwgroup->hwif);
215 if (irq_count == 1)
216 free_irq(hwif->irq, hwgroup);
217
Bartlomiej Zolnierkiewicz96e5ad32008-02-01 23:09:35 +0100218 ide_remove_port_from_hwgroup(hwif);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700219
Bartlomiej Zolnierkiewiczf74c9142008-04-18 00:46:23 +0200220 device_unregister(hwif->portdev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700221 device_unregister(&hwif->gendev);
Aleksey Makarovf36d4022006-01-09 15:59:27 -0800222 wait_for_completion(&hwif->gendev_rel_comp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700223
224 /*
225 * Remove us from the kernel's knowledge
226 */
227 blk_unregister_region(MKDEV(hwif->major, 0), MAX_DRIVES<<PARTN_BITS);
228 kfree(hwif->sg_table);
229 unregister_blkdev(hwif->major, hwif->name);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700230
Bartlomiej Zolnierkiewicz93de00f2008-04-18 00:46:24 +0200231 if (hwif->dma_base)
Bartlomiej Zolnierkiewicz0d1bad22008-04-26 22:25:19 +0200232 ide_release_dma_engine(hwif);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700233
Matthias Kaehlckeef298882007-07-09 23:17:55 +0200234 mutex_unlock(&ide_cfg_mtx);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700235}
236
Bartlomiej Zolnierkiewicz57c802e2008-01-26 20:13:05 +0100237void ide_init_port_hw(ide_hwif_t *hwif, hw_regs_t *hw)
238{
Bartlomiej Zolnierkiewicz4c3032d2008-04-27 15:38:32 +0200239 memcpy(&hwif->io_ports, &hw->io_ports, sizeof(hwif->io_ports));
Bartlomiej Zolnierkiewicz57c802e2008-01-26 20:13:05 +0100240 hwif->irq = hw->irq;
Bartlomiej Zolnierkiewicz57c802e2008-01-26 20:13:05 +0100241 hwif->chipset = hw->chipset;
Bartlomiej Zolnierkiewiczc56c5642008-07-16 20:33:40 +0200242 hwif->dev = hw->dev;
243 hwif->gendev.parent = hw->parent ? hw->parent : hw->dev;
Bartlomiej Zolnierkiewicz57c802e2008-01-26 20:13:05 +0100244 hwif->ack_intr = hw->ack_intr;
Bartlomiej Zolnierkiewiczd6276b52008-07-23 19:55:56 +0200245 hwif->config_data = hw->config;
Bartlomiej Zolnierkiewicz57c802e2008-01-26 20:13:05 +0100246}
Bartlomiej Zolnierkiewicz57c802e2008-01-26 20:13:05 +0100247
Linus Torvalds1da177e2005-04-16 15:20:36 -0700248/*
249 * Locks for IDE setting functionality
250 */
251
Matthias Kaehlckef9383c42007-07-09 23:17:56 +0200252DEFINE_MUTEX(ide_setting_mtx);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700253
Matthias Kaehlckef9383c42007-07-09 23:17:56 +0200254EXPORT_SYMBOL_GPL(ide_setting_mtx);
Bartlomiej Zolnierkiewicz14979432007-05-10 00:01:10 +0200255
Linus Torvalds1da177e2005-04-16 15:20:36 -0700256/**
Linus Torvalds1da177e2005-04-16 15:20:36 -0700257 * ide_spin_wait_hwgroup - wait for group
258 * @drive: drive in the group
259 *
260 * Wait for an IDE device group to go non busy and then return
261 * holding the ide_lock which guards the hwgroup->busy status
262 * and right to use it.
263 */
264
265int ide_spin_wait_hwgroup (ide_drive_t *drive)
266{
267 ide_hwgroup_t *hwgroup = HWGROUP(drive);
268 unsigned long timeout = jiffies + (3 * HZ);
269
270 spin_lock_irq(&ide_lock);
271
272 while (hwgroup->busy) {
273 unsigned long lflags;
274 spin_unlock_irq(&ide_lock);
275 local_irq_set(lflags);
276 if (time_after(jiffies, timeout)) {
277 local_irq_restore(lflags);
278 printk(KERN_ERR "%s: channel busy\n", drive->name);
279 return -EBUSY;
280 }
281 local_irq_restore(lflags);
282 spin_lock_irq(&ide_lock);
283 }
284 return 0;
285}
286
287EXPORT_SYMBOL(ide_spin_wait_hwgroup);
288
Bartlomiej Zolnierkiewicz7662d042007-05-10 00:01:10 +0200289int set_io_32bit(ide_drive_t *drive, int arg)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700290{
Bartlomiej Zolnierkiewicz14979432007-05-10 00:01:10 +0200291 if (drive->no_io_32bit)
292 return -EPERM;
293
294 if (arg < 0 || arg > 1 + (SUPPORT_VLB_SYNC << 1))
295 return -EINVAL;
296
Bartlomiej Zolnierkiewicz644a9d72007-12-12 23:32:00 +0100297 if (ide_spin_wait_hwgroup(drive))
298 return -EBUSY;
299
Linus Torvalds1da177e2005-04-16 15:20:36 -0700300 drive->io_32bit = arg;
Bartlomiej Zolnierkiewicz644a9d72007-12-12 23:32:00 +0100301
302 spin_unlock_irq(&ide_lock);
303
Linus Torvalds1da177e2005-04-16 15:20:36 -0700304 return 0;
305}
306
Bartlomiej Zolnierkiewicz14979432007-05-10 00:01:10 +0200307static int set_ksettings(ide_drive_t *drive, int arg)
308{
309 if (arg < 0 || arg > 1)
310 return -EINVAL;
311
312 if (ide_spin_wait_hwgroup(drive))
313 return -EBUSY;
314 drive->keep_settings = arg;
315 spin_unlock_irq(&ide_lock);
316
317 return 0;
318}
319
Bartlomiej Zolnierkiewicz7662d042007-05-10 00:01:10 +0200320int set_using_dma(ide_drive_t *drive, int arg)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700321{
322#ifdef CONFIG_BLK_DEV_IDEDMA
Bartlomiej Zolnierkiewicz87996202007-03-26 23:03:19 +0200323 ide_hwif_t *hwif = drive->hwif;
324 int err = -EPERM;
325
Bartlomiej Zolnierkiewicz14979432007-05-10 00:01:10 +0200326 if (arg < 0 || arg > 1)
327 return -EINVAL;
328
Bartlomiej Zolnierkiewicz48fb2682008-10-10 22:39:19 +0200329 if (ata_id_has_dma(drive->id) == 0)
Bartlomiej Zolnierkiewicz87996202007-03-26 23:03:19 +0200330 goto out;
331
Bartlomiej Zolnierkiewicz5e37bdc2008-04-26 22:25:24 +0200332 if (hwif->dma_ops == NULL)
Bartlomiej Zolnierkiewicz87996202007-03-26 23:03:19 +0200333 goto out;
334
335 err = -EBUSY;
336 if (ide_spin_wait_hwgroup(drive))
337 goto out;
338 /*
339 * set ->busy flag, unlock and let it ride
340 */
341 hwif->hwgroup->busy = 1;
342 spin_unlock_irq(&ide_lock);
343
344 err = 0;
345
Linus Torvalds1da177e2005-04-16 15:20:36 -0700346 if (arg) {
Bartlomiej Zolnierkiewicz23b1bd42008-01-25 22:17:19 +0100347 if (ide_set_dma(drive))
Bartlomiej Zolnierkiewicz87996202007-03-26 23:03:19 +0200348 err = -EIO;
Bartlomiej Zolnierkiewicz7469aaf2007-02-17 02:40:26 +0100349 } else
350 ide_dma_off(drive);
Bartlomiej Zolnierkiewicz87996202007-03-26 23:03:19 +0200351
352 /*
353 * lock, clear ->busy flag and unlock before leaving
354 */
355 spin_lock_irq(&ide_lock);
356 hwif->hwgroup->busy = 0;
357 spin_unlock_irq(&ide_lock);
358out:
359 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700360#else
Bartlomiej Zolnierkiewicz14979432007-05-10 00:01:10 +0200361 if (arg < 0 || arg > 1)
362 return -EINVAL;
363
Linus Torvalds1da177e2005-04-16 15:20:36 -0700364 return -EPERM;
365#endif
366}
367
Bartlomiej Zolnierkiewicz7662d042007-05-10 00:01:10 +0200368int set_pio_mode(ide_drive_t *drive, int arg)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700369{
FUJITA Tomonori5b114712008-07-15 21:21:44 +0200370 struct request *rq;
Bartlomiej Zolnierkiewicz784506c2008-04-26 17:36:43 +0200371 ide_hwif_t *hwif = drive->hwif;
Bartlomiej Zolnierkiewiczac95bee2008-04-26 22:25:14 +0200372 const struct ide_port_ops *port_ops = hwif->port_ops;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700373
Bartlomiej Zolnierkiewicz14979432007-05-10 00:01:10 +0200374 if (arg < 0 || arg > 255)
375 return -EINVAL;
376
Bartlomiej Zolnierkiewiczac95bee2008-04-26 22:25:14 +0200377 if (port_ops == NULL || port_ops->set_pio_mode == NULL ||
Bartlomiej Zolnierkiewicz784506c2008-04-26 17:36:43 +0200378 (hwif->host_flags & IDE_HFLAG_NO_SET_MODE))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700379 return -ENOSYS;
Bartlomiej Zolnierkiewicz26bcb872007-10-11 23:54:00 +0200380
Linus Torvalds1da177e2005-04-16 15:20:36 -0700381 if (drive->special.b.set_tune)
382 return -EBUSY;
Bartlomiej Zolnierkiewicz145b75e2008-01-26 20:13:11 +0100383
FUJITA Tomonori5b114712008-07-15 21:21:44 +0200384 rq = blk_get_request(drive->queue, READ, __GFP_WAIT);
385 rq->cmd_type = REQ_TYPE_ATA_TASKFILE;
Bartlomiej Zolnierkiewicz145b75e2008-01-26 20:13:11 +0100386
Linus Torvalds1da177e2005-04-16 15:20:36 -0700387 drive->tune_req = (u8) arg;
388 drive->special.b.set_tune = 1;
FUJITA Tomonori5b114712008-07-15 21:21:44 +0200389
390 blk_execute_rq(drive->queue, NULL, rq, 0);
391 blk_put_request(rq);
392
Linus Torvalds1da177e2005-04-16 15:20:36 -0700393 return 0;
394}
395
Bartlomiej Zolnierkiewicz14979432007-05-10 00:01:10 +0200396static int set_unmaskirq(ide_drive_t *drive, int arg)
397{
398 if (drive->no_unmask)
399 return -EPERM;
400
401 if (arg < 0 || arg > 1)
402 return -EINVAL;
403
404 if (ide_spin_wait_hwgroup(drive))
405 return -EBUSY;
406 drive->unmask = arg;
407 spin_unlock_irq(&ide_lock);
408
409 return 0;
410}
411
David Brownellb887d2e2006-08-14 23:11:05 -0700412static int generic_ide_suspend(struct device *dev, pm_message_t mesg)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700413{
414 ide_drive_t *drive = dev->driver_data;
Hannes Reineckee3a59b42007-02-07 18:19:37 +0100415 ide_hwif_t *hwif = HWIF(drive);
FUJITA Tomonori5b114712008-07-15 21:21:44 +0200416 struct request *rq;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700417 struct request_pm_state rqpm;
418 ide_task_t args;
Shaohua Li5e321322007-10-11 23:53:58 +0200419 int ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700420
Hannes Reineckee3a59b42007-02-07 18:19:37 +0100421 /* Call ACPI _GTM only once */
422 if (!(drive->dn % 2))
423 ide_acpi_get_timing(hwif);
424
Linus Torvalds1da177e2005-04-16 15:20:36 -0700425 memset(&rqpm, 0, sizeof(rqpm));
426 memset(&args, 0, sizeof(args));
FUJITA Tomonori5b114712008-07-15 21:21:44 +0200427 rq = blk_get_request(drive->queue, READ, __GFP_WAIT);
428 rq->cmd_type = REQ_TYPE_PM_SUSPEND;
429 rq->special = &args;
430 rq->data = &rqpm;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700431 rqpm.pm_step = ide_pm_state_start_suspend;
David Brownellb887d2e2006-08-14 23:11:05 -0700432 if (mesg.event == PM_EVENT_PRETHAW)
433 mesg.event = PM_EVENT_FREEZE;
434 rqpm.pm_state = mesg.event;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700435
FUJITA Tomonori5b114712008-07-15 21:21:44 +0200436 ret = blk_execute_rq(drive->queue, NULL, rq, 0);
437 blk_put_request(rq);
Shaohua Li5e321322007-10-11 23:53:58 +0200438 /* only call ACPI _PS3 after both drivers are suspended */
439 if (!ret && (((drive->dn % 2) && hwif->drives[0].present
440 && hwif->drives[1].present)
441 || !hwif->drives[0].present
442 || !hwif->drives[1].present))
443 ide_acpi_set_state(hwif, 0);
444 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700445}
446
447static int generic_ide_resume(struct device *dev)
448{
449 ide_drive_t *drive = dev->driver_data;
Hannes Reineckee3a59b42007-02-07 18:19:37 +0100450 ide_hwif_t *hwif = HWIF(drive);
FUJITA Tomonori5b114712008-07-15 21:21:44 +0200451 struct request *rq;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700452 struct request_pm_state rqpm;
453 ide_task_t args;
Lee Trager0d2157f2007-06-08 15:14:30 +0200454 int err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700455
Hannes Reineckee3a59b42007-02-07 18:19:37 +0100456 /* Call ACPI _STM only once */
Shaohua Li5e321322007-10-11 23:53:58 +0200457 if (!(drive->dn % 2)) {
458 ide_acpi_set_state(hwif, 1);
Hannes Reineckee3a59b42007-02-07 18:19:37 +0100459 ide_acpi_push_timing(hwif);
Shaohua Li5e321322007-10-11 23:53:58 +0200460 }
Hannes Reineckee3a59b42007-02-07 18:19:37 +0100461
462 ide_acpi_exec_tfs(drive);
463
Linus Torvalds1da177e2005-04-16 15:20:36 -0700464 memset(&rqpm, 0, sizeof(rqpm));
465 memset(&args, 0, sizeof(args));
FUJITA Tomonori5b114712008-07-15 21:21:44 +0200466 rq = blk_get_request(drive->queue, READ, __GFP_WAIT);
467 rq->cmd_type = REQ_TYPE_PM_RESUME;
468 rq->cmd_flags |= REQ_PREEMPT;
469 rq->special = &args;
470 rq->data = &rqpm;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700471 rqpm.pm_step = ide_pm_state_start_resume;
Pavel Machekca078ba2005-09-03 15:56:57 -0700472 rqpm.pm_state = PM_EVENT_ON;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700473
FUJITA Tomonori5b114712008-07-15 21:21:44 +0200474 err = blk_execute_rq(drive->queue, NULL, rq, 1);
475 blk_put_request(rq);
Lee Trager0d2157f2007-06-08 15:14:30 +0200476
Rafael J. Wysockice9b2b02007-06-16 02:24:43 +0200477 if (err == 0 && dev->driver) {
478 ide_driver_t *drv = to_ide_driver(dev->driver);
479
480 if (drv->resume)
481 drv->resume(drive);
482 }
Lee Trager0d2157f2007-06-08 15:14:30 +0200483
484 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700485}
486
Elias Oltmanns64a8f002008-07-16 20:33:48 +0200487static int generic_drive_reset(ide_drive_t *drive)
Elias Oltmanns79e36a92008-07-16 20:33:48 +0200488{
489 struct request *rq;
Elias Oltmanns64a8f002008-07-16 20:33:48 +0200490 int ret = 0;
Elias Oltmanns79e36a92008-07-16 20:33:48 +0200491
492 rq = blk_get_request(drive->queue, READ, __GFP_WAIT);
493 rq->cmd_type = REQ_TYPE_SPECIAL;
494 rq->cmd_len = 1;
495 rq->cmd[0] = REQ_DRIVE_RESET;
496 rq->cmd_flags |= REQ_SOFTBARRIER;
Elias Oltmanns64a8f002008-07-16 20:33:48 +0200497 if (blk_execute_rq(drive->queue, NULL, rq, 1))
498 ret = rq->errors;
Elias Oltmanns79e36a92008-07-16 20:33:48 +0200499 blk_put_request(rq);
Elias Oltmanns64a8f002008-07-16 20:33:48 +0200500 return ret;
Elias Oltmanns79e36a92008-07-16 20:33:48 +0200501}
502
Bartlomiej Zolnierkiewicz48fb2682008-10-10 22:39:19 +0200503static inline void ide_id_to_hd_driveid(u16 *id)
504{
505#ifdef __BIG_ENDIAN
506 /* accessed in struct hd_driveid as 8-bit values */
507 id[ATA_ID_MAX_MULTSECT] = __cpu_to_le16(id[ATA_ID_MAX_MULTSECT]);
508 id[ATA_ID_CAPABILITY] = __cpu_to_le16(id[ATA_ID_CAPABILITY]);
509 id[ATA_ID_OLD_PIO_MODES] = __cpu_to_le16(id[ATA_ID_OLD_PIO_MODES]);
510 id[ATA_ID_OLD_DMA_MODES] = __cpu_to_le16(id[ATA_ID_OLD_DMA_MODES]);
511 id[ATA_ID_MULTSECT] = __cpu_to_le16(id[ATA_ID_MULTSECT]);
512
513 /* as 32-bit values */
514 *(u32 *)&id[ATA_ID_LBA_CAPACITY] = ata_id_u32(id, ATA_ID_LBA_CAPACITY);
515 *(u32 *)&id[ATA_ID_SPG] = ata_id_u32(id, ATA_ID_SPG);
516
517 /* as 64-bit value */
518 *(u64 *)&id[ATA_ID_LBA_CAPACITY_2] =
519 ata_id_u64(id, ATA_ID_LBA_CAPACITY_2);
520#endif
521}
522
523static int ide_get_identity_ioctl(ide_drive_t *drive, unsigned int cmd,
524 unsigned long arg)
525{
526 u16 *id = NULL;
527 int size = (cmd == HDIO_GET_IDENTITY) ? (ATA_ID_WORDS * 2) : 142;
528 int rc = 0;
529
530 if (drive->id_read == 0) {
531 rc = -ENOMSG;
532 goto out;
533 }
534
535 id = kmalloc(size, GFP_KERNEL);
536 if (id == NULL) {
537 rc = -ENOMEM;
538 goto out;
539 }
540
541 memcpy(id, drive->id, size);
542 ide_id_to_hd_driveid(id);
543
544 if (copy_to_user((void __user *)arg, id, size))
545 rc = -EFAULT;
546
547 kfree(id);
548out:
549 return rc;
550}
551
Linus Torvalds1da177e2005-04-16 15:20:36 -0700552int generic_ide_ioctl(ide_drive_t *drive, struct file *file, struct block_device *bdev,
553 unsigned int cmd, unsigned long arg)
554{
Bartlomiej Zolnierkiewicz14979432007-05-10 00:01:10 +0200555 unsigned long flags;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700556 ide_driver_t *drv;
Linus Torvalds19850262007-07-17 15:57:42 -0700557 int err = 0, (*setfunc)(ide_drive_t *, int);
Bartlomiej Zolnierkiewicz14979432007-05-10 00:01:10 +0200558 u8 *val;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700559
Bartlomiej Zolnierkiewicz14979432007-05-10 00:01:10 +0200560 switch (cmd) {
561 case HDIO_GET_32BIT: val = &drive->io_32bit; goto read_val;
562 case HDIO_GET_KEEPSETTINGS: val = &drive->keep_settings; goto read_val;
563 case HDIO_GET_UNMASKINTR: val = &drive->unmask; goto read_val;
564 case HDIO_GET_DMA: val = &drive->using_dma; goto read_val;
565 case HDIO_SET_32BIT: setfunc = set_io_32bit; goto set_val;
566 case HDIO_SET_KEEPSETTINGS: setfunc = set_ksettings; goto set_val;
567 case HDIO_SET_PIO_MODE: setfunc = set_pio_mode; goto set_val;
568 case HDIO_SET_UNMASKINTR: setfunc = set_unmaskirq; goto set_val;
569 case HDIO_SET_DMA: setfunc = set_using_dma; goto set_val;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700570 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700571
572 switch (cmd) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700573 case HDIO_OBSOLETE_IDENTITY:
574 case HDIO_GET_IDENTITY:
575 if (bdev != bdev->bd_contains)
576 return -EINVAL;
Bartlomiej Zolnierkiewicz48fb2682008-10-10 22:39:19 +0200577 return ide_get_identity_ioctl(drive, cmd, arg);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700578 case HDIO_GET_NICE:
579 return put_user(drive->dsc_overlap << IDE_NICE_DSC_OVERLAP |
580 drive->atapi_overlap << IDE_NICE_ATAPI_OVERLAP |
Bartlomiej Zolnierkiewicz92b83c82008-02-02 19:56:45 +0100581 drive->nice1 << IDE_NICE_1,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700582 (long __user *) arg);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700583#ifdef CONFIG_IDE_TASK_IOCTL
584 case HDIO_DRIVE_TASKFILE:
585 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
586 return -EACCES;
587 switch(drive->media) {
588 case ide_disk:
589 return ide_taskfile_ioctl(drive, cmd, arg);
590 default:
591 return -ENOMSG;
592 }
593#endif /* CONFIG_IDE_TASK_IOCTL */
594
595 case HDIO_DRIVE_CMD:
596 if (!capable(CAP_SYS_RAWIO))
597 return -EACCES;
598 return ide_cmd_ioctl(drive, cmd, arg);
599
600 case HDIO_DRIVE_TASK:
601 if (!capable(CAP_SYS_RAWIO))
602 return -EACCES;
603 return ide_task_ioctl(drive, cmd, arg);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700604 case HDIO_SET_NICE:
605 if (!capable(CAP_SYS_ADMIN)) return -EACCES;
606 if (arg != (arg & ((1 << IDE_NICE_DSC_OVERLAP) | (1 << IDE_NICE_1))))
607 return -EPERM;
608 drive->dsc_overlap = (arg >> IDE_NICE_DSC_OVERLAP) & 1;
609 drv = *(ide_driver_t **)bdev->bd_disk->private_data;
610 if (drive->dsc_overlap && !drv->supports_dsc_overlap) {
611 drive->dsc_overlap = 0;
612 return -EPERM;
613 }
614 drive->nice1 = (arg >> IDE_NICE_1) & 1;
615 return 0;
616 case HDIO_DRIVE_RESET:
Bartlomiej Zolnierkiewiczdbecebc2008-02-26 21:50:35 +0100617 if (!capable(CAP_SYS_ADMIN))
618 return -EACCES;
619
Elias Oltmanns64a8f002008-07-16 20:33:48 +0200620 return generic_drive_reset(drive);
Elias Oltmanns79e36a92008-07-16 20:33:48 +0200621
Linus Torvalds1da177e2005-04-16 15:20:36 -0700622 case HDIO_GET_BUSSTATE:
623 if (!capable(CAP_SYS_ADMIN))
624 return -EACCES;
625 if (put_user(HWIF(drive)->bus_state, (long __user *)arg))
626 return -EFAULT;
627 return 0;
628
629 case HDIO_SET_BUSSTATE:
630 if (!capable(CAP_SYS_ADMIN))
631 return -EACCES;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700632 return -EOPNOTSUPP;
633 default:
634 return -EINVAL;
635 }
Bartlomiej Zolnierkiewicz14979432007-05-10 00:01:10 +0200636
637read_val:
Matthias Kaehlckef9383c42007-07-09 23:17:56 +0200638 mutex_lock(&ide_setting_mtx);
Bartlomiej Zolnierkiewicz14979432007-05-10 00:01:10 +0200639 spin_lock_irqsave(&ide_lock, flags);
640 err = *val;
641 spin_unlock_irqrestore(&ide_lock, flags);
Matthias Kaehlckef9383c42007-07-09 23:17:56 +0200642 mutex_unlock(&ide_setting_mtx);
Bartlomiej Zolnierkiewicz14979432007-05-10 00:01:10 +0200643 return err >= 0 ? put_user(err, (long __user *)arg) : err;
644
645set_val:
646 if (bdev != bdev->bd_contains)
647 err = -EINVAL;
648 else {
649 if (!capable(CAP_SYS_ADMIN))
650 err = -EACCES;
651 else {
Matthias Kaehlckef9383c42007-07-09 23:17:56 +0200652 mutex_lock(&ide_setting_mtx);
Bartlomiej Zolnierkiewicz14979432007-05-10 00:01:10 +0200653 err = setfunc(drive, arg);
Matthias Kaehlckef9383c42007-07-09 23:17:56 +0200654 mutex_unlock(&ide_setting_mtx);
Bartlomiej Zolnierkiewicz14979432007-05-10 00:01:10 +0200655 }
656 }
657 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700658}
659
660EXPORT_SYMBOL(generic_ide_ioctl);
661
Bartlomiej Zolnierkiewicz08da5912008-07-24 22:53:15 +0200662/**
663 * ide_device_get - get an additional reference to a ide_drive_t
664 * @drive: device to get a reference to
665 *
666 * Gets a reference to the ide_drive_t and increments the use count of the
667 * underlying LLDD module.
668 */
669int ide_device_get(ide_drive_t *drive)
670{
671 struct device *host_dev;
672 struct module *module;
673
674 if (!get_device(&drive->gendev))
675 return -ENXIO;
676
677 host_dev = drive->hwif->host->dev[0];
678 module = host_dev ? host_dev->driver->owner : NULL;
679
680 if (module && !try_module_get(module)) {
681 put_device(&drive->gendev);
682 return -ENXIO;
683 }
684
685 return 0;
686}
687EXPORT_SYMBOL_GPL(ide_device_get);
688
689/**
690 * ide_device_put - release a reference to a ide_drive_t
691 * @drive: device to release a reference on
692 *
693 * Release a reference to the ide_drive_t and decrements the use count of
694 * the underlying LLDD module.
695 */
696void ide_device_put(ide_drive_t *drive)
697{
698#ifdef CONFIG_MODULE_UNLOAD
699 struct device *host_dev = drive->hwif->host->dev[0];
700 struct module *module = host_dev ? host_dev->driver->owner : NULL;
701
702 if (module)
703 module_put(module);
704#endif
705 put_device(&drive->gendev);
706}
707EXPORT_SYMBOL_GPL(ide_device_put);
708
Bartlomiej Zolnierkiewicz8604aff2005-05-26 14:55:34 +0200709static int ide_bus_match(struct device *dev, struct device_driver *drv)
710{
711 return 1;
712}
713
Kay Sievers263756e2005-12-12 18:03:44 +0100714static char *media_string(ide_drive_t *drive)
715{
716 switch (drive->media) {
717 case ide_disk:
718 return "disk";
719 case ide_cdrom:
720 return "cdrom";
721 case ide_tape:
722 return "tape";
723 case ide_floppy:
724 return "floppy";
Danny Kukawkaa7a832d2007-04-10 22:39:14 +0200725 case ide_optical:
726 return "optical";
Kay Sievers263756e2005-12-12 18:03:44 +0100727 default:
728 return "UNKNOWN";
729 }
730}
731
732static ssize_t media_show(struct device *dev, struct device_attribute *attr, char *buf)
733{
734 ide_drive_t *drive = to_ide_device(dev);
735 return sprintf(buf, "%s\n", media_string(drive));
736}
737
738static ssize_t drivename_show(struct device *dev, struct device_attribute *attr, char *buf)
739{
740 ide_drive_t *drive = to_ide_device(dev);
741 return sprintf(buf, "%s\n", drive->name);
742}
743
744static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf)
745{
746 ide_drive_t *drive = to_ide_device(dev);
747 return sprintf(buf, "ide:m-%s\n", media_string(drive));
748}
749
Bartlomiej Zolnierkiewicze11b9032007-12-12 23:31:58 +0100750static ssize_t model_show(struct device *dev, struct device_attribute *attr,
751 char *buf)
752{
753 ide_drive_t *drive = to_ide_device(dev);
Bartlomiej Zolnierkiewicz4dde4492008-10-10 22:39:19 +0200754 return sprintf(buf, "%s\n", (char *)&drive->id[ATA_ID_PROD]);
Bartlomiej Zolnierkiewicze11b9032007-12-12 23:31:58 +0100755}
756
757static ssize_t firmware_show(struct device *dev, struct device_attribute *attr,
758 char *buf)
759{
760 ide_drive_t *drive = to_ide_device(dev);
Bartlomiej Zolnierkiewicz4dde4492008-10-10 22:39:19 +0200761 return sprintf(buf, "%s\n", (char *)&drive->id[ATA_ID_FW_REV]);
Bartlomiej Zolnierkiewicze11b9032007-12-12 23:31:58 +0100762}
763
764static ssize_t serial_show(struct device *dev, struct device_attribute *attr,
765 char *buf)
766{
767 ide_drive_t *drive = to_ide_device(dev);
Bartlomiej Zolnierkiewicz4dde4492008-10-10 22:39:19 +0200768 return sprintf(buf, "%s\n", (char *)&drive->id[ATA_ID_SERNO]);
Bartlomiej Zolnierkiewicze11b9032007-12-12 23:31:58 +0100769}
770
Kay Sievers263756e2005-12-12 18:03:44 +0100771static struct device_attribute ide_dev_attrs[] = {
772 __ATTR_RO(media),
773 __ATTR_RO(drivename),
774 __ATTR_RO(modalias),
Bartlomiej Zolnierkiewicze11b9032007-12-12 23:31:58 +0100775 __ATTR_RO(model),
776 __ATTR_RO(firmware),
777 __ATTR(serial, 0400, serial_show, NULL),
Kay Sievers263756e2005-12-12 18:03:44 +0100778 __ATTR_NULL
779};
780
Kay Sievers7eff2e72007-08-14 15:15:12 +0200781static int ide_uevent(struct device *dev, struct kobj_uevent_env *env)
Kay Sievers263756e2005-12-12 18:03:44 +0100782{
783 ide_drive_t *drive = to_ide_device(dev);
Kay Sievers263756e2005-12-12 18:03:44 +0100784
Kay Sievers7eff2e72007-08-14 15:15:12 +0200785 add_uevent_var(env, "MEDIA=%s", media_string(drive));
786 add_uevent_var(env, "DRIVENAME=%s", drive->name);
787 add_uevent_var(env, "MODALIAS=ide:m-%s", media_string(drive));
Kay Sievers263756e2005-12-12 18:03:44 +0100788 return 0;
789}
790
Russell King4031bbe2006-01-06 11:41:00 +0000791static int generic_ide_probe(struct device *dev)
792{
793 ide_drive_t *drive = to_ide_device(dev);
794 ide_driver_t *drv = to_ide_driver(dev->driver);
795
796 return drv->probe ? drv->probe(drive) : -ENODEV;
797}
798
799static int generic_ide_remove(struct device *dev)
800{
801 ide_drive_t *drive = to_ide_device(dev);
802 ide_driver_t *drv = to_ide_driver(dev->driver);
803
804 if (drv->remove)
805 drv->remove(drive);
806
807 return 0;
808}
809
810static void generic_ide_shutdown(struct device *dev)
811{
812 ide_drive_t *drive = to_ide_device(dev);
813 ide_driver_t *drv = to_ide_driver(dev->driver);
814
815 if (dev->driver && drv->shutdown)
816 drv->shutdown(drive);
817}
818
Linus Torvalds1da177e2005-04-16 15:20:36 -0700819struct bus_type ide_bus_type = {
820 .name = "ide",
Bartlomiej Zolnierkiewicz8604aff2005-05-26 14:55:34 +0200821 .match = ide_bus_match,
Kay Sievers263756e2005-12-12 18:03:44 +0100822 .uevent = ide_uevent,
Russell King4031bbe2006-01-06 11:41:00 +0000823 .probe = generic_ide_probe,
824 .remove = generic_ide_remove,
825 .shutdown = generic_ide_shutdown,
Kay Sievers263756e2005-12-12 18:03:44 +0100826 .dev_attrs = ide_dev_attrs,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700827 .suspend = generic_ide_suspend,
828 .resume = generic_ide_resume,
829};
830
Bartlomiej Zolnierkiewicz8604aff2005-05-26 14:55:34 +0200831EXPORT_SYMBOL_GPL(ide_bus_type);
832
Bartlomiej Zolnierkiewiczebae41a2008-04-27 15:38:29 +0200833int ide_vlb_clk;
834EXPORT_SYMBOL_GPL(ide_vlb_clk);
835
836module_param_named(vlb_clock, ide_vlb_clk, int, 0);
837MODULE_PARM_DESC(vlb_clock, "VLB clock frequency (in MHz)");
838
839int ide_pci_clk;
840EXPORT_SYMBOL_GPL(ide_pci_clk);
841
842module_param_named(pci_clock, ide_pci_clk, int, 0);
843MODULE_PARM_DESC(pci_clock, "PCI bus clock frequency (in MHz)");
844
Bartlomiej Zolnierkiewicz6e875432008-04-27 15:38:30 +0200845static int ide_set_dev_param_mask(const char *s, struct kernel_param *kp)
846{
847 int a, b, i, j = 1;
848 unsigned int *dev_param_mask = (unsigned int *)kp->arg;
849
850 if (sscanf(s, "%d.%d:%d", &a, &b, &j) != 3 &&
851 sscanf(s, "%d.%d", &a, &b) != 2)
852 return -EINVAL;
853
854 i = a * MAX_DRIVES + b;
855
856 if (i >= MAX_HWIFS * MAX_DRIVES || j < 0 || j > 1)
857 return -EINVAL;
858
859 if (j)
860 *dev_param_mask |= (1 << i);
861 else
862 *dev_param_mask &= (1 << i);
863
864 return 0;
865}
866
867static unsigned int ide_nodma;
868
869module_param_call(nodma, ide_set_dev_param_mask, NULL, &ide_nodma, 0);
870MODULE_PARM_DESC(nodma, "disallow DMA for a device");
871
872static unsigned int ide_noflush;
873
874module_param_call(noflush, ide_set_dev_param_mask, NULL, &ide_noflush, 0);
875MODULE_PARM_DESC(noflush, "disable flush requests for a device");
876
877static unsigned int ide_noprobe;
878
879module_param_call(noprobe, ide_set_dev_param_mask, NULL, &ide_noprobe, 0);
880MODULE_PARM_DESC(noprobe, "skip probing for a device");
881
882static unsigned int ide_nowerr;
883
884module_param_call(nowerr, ide_set_dev_param_mask, NULL, &ide_nowerr, 0);
Bartlomiej Zolnierkiewicz3a7d2482008-10-10 22:39:21 +0200885MODULE_PARM_DESC(nowerr, "ignore the ATA_DF bit for a device");
Bartlomiej Zolnierkiewicz6e875432008-04-27 15:38:30 +0200886
Bartlomiej Zolnierkiewicz4706a7e2008-04-27 15:38:30 +0200887static unsigned int ide_cdroms;
888
889module_param_call(cdrom, ide_set_dev_param_mask, NULL, &ide_cdroms, 0);
890MODULE_PARM_DESC(cdrom, "force device as a CD-ROM");
891
892struct chs_geom {
893 unsigned int cyl;
894 u8 head;
895 u8 sect;
896};
897
898static unsigned int ide_disks;
899static struct chs_geom ide_disks_chs[MAX_HWIFS * MAX_DRIVES];
900
901static int ide_set_disk_chs(const char *str, struct kernel_param *kp)
902{
903 int a, b, c = 0, h = 0, s = 0, i, j = 1;
904
905 if (sscanf(str, "%d.%d:%d,%d,%d", &a, &b, &c, &h, &s) != 5 &&
906 sscanf(str, "%d.%d:%d", &a, &b, &j) != 3)
907 return -EINVAL;
908
909 i = a * MAX_DRIVES + b;
910
911 if (i >= MAX_HWIFS * MAX_DRIVES || j < 0 || j > 1)
912 return -EINVAL;
913
914 if (c > INT_MAX || h > 255 || s > 255)
915 return -EINVAL;
916
917 if (j)
918 ide_disks |= (1 << i);
919 else
920 ide_disks &= (1 << i);
921
922 ide_disks_chs[i].cyl = c;
923 ide_disks_chs[i].head = h;
924 ide_disks_chs[i].sect = s;
925
926 return 0;
927}
928
929module_param_call(chs, ide_set_disk_chs, NULL, NULL, 0);
930MODULE_PARM_DESC(chs, "force device as a disk (using CHS)");
931
Bartlomiej Zolnierkiewicz6e875432008-04-27 15:38:30 +0200932static void ide_dev_apply_params(ide_drive_t *drive)
933{
934 int i = drive->hwif->index * MAX_DRIVES + drive->select.b.unit;
935
936 if (ide_nodma & (1 << i)) {
937 printk(KERN_INFO "ide: disallowing DMA for %s\n", drive->name);
938 drive->nodma = 1;
939 }
940 if (ide_noflush & (1 << i)) {
941 printk(KERN_INFO "ide: disabling flush requests for %s\n",
942 drive->name);
943 drive->noflush = 1;
944 }
945 if (ide_noprobe & (1 << i)) {
946 printk(KERN_INFO "ide: skipping probe for %s\n", drive->name);
947 drive->noprobe = 1;
948 }
949 if (ide_nowerr & (1 << i)) {
Bartlomiej Zolnierkiewicz3a7d2482008-10-10 22:39:21 +0200950 printk(KERN_INFO "ide: ignoring the ATA_DF bit for %s\n",
Bartlomiej Zolnierkiewicz6e875432008-04-27 15:38:30 +0200951 drive->name);
952 drive->bad_wstat = BAD_R_STAT;
953 }
Bartlomiej Zolnierkiewicz4706a7e2008-04-27 15:38:30 +0200954 if (ide_cdroms & (1 << i)) {
955 printk(KERN_INFO "ide: forcing %s as a CD-ROM\n", drive->name);
956 drive->present = 1;
957 drive->media = ide_cdrom;
958 /* an ATAPI device ignores DRDY */
959 drive->ready_stat = 0;
960 }
961 if (ide_disks & (1 << i)) {
962 drive->cyl = drive->bios_cyl = ide_disks_chs[i].cyl;
963 drive->head = drive->bios_head = ide_disks_chs[i].head;
964 drive->sect = drive->bios_sect = ide_disks_chs[i].sect;
965 drive->forced_geom = 1;
966 printk(KERN_INFO "ide: forcing %s as a disk (%d/%d/%d)\n",
967 drive->name,
968 drive->cyl, drive->head, drive->sect);
969 drive->present = 1;
970 drive->media = ide_disk;
Bartlomiej Zolnierkiewicz3a7d2482008-10-10 22:39:21 +0200971 drive->ready_stat = ATA_DRDY;
Bartlomiej Zolnierkiewicz4706a7e2008-04-27 15:38:30 +0200972 }
Bartlomiej Zolnierkiewicz6e875432008-04-27 15:38:30 +0200973}
974
Bartlomiej Zolnierkiewicz9fd91d92008-04-27 15:38:23 +0200975static unsigned int ide_ignore_cable;
976
977static int ide_set_ignore_cable(const char *s, struct kernel_param *kp)
978{
979 int i, j = 1;
980
981 if (sscanf(s, "%d:%d", &i, &j) != 2 && sscanf(s, "%d", &i) != 1)
982 return -EINVAL;
983
984 if (i >= MAX_HWIFS || j < 0 || j > 1)
985 return -EINVAL;
986
987 if (j)
988 ide_ignore_cable |= (1 << i);
989 else
990 ide_ignore_cable &= (1 << i);
991
992 return 0;
993}
994
995module_param_call(ignore_cable, ide_set_ignore_cable, NULL, NULL, 0);
996MODULE_PARM_DESC(ignore_cable, "ignore cable detection");
997
998void ide_port_apply_params(ide_hwif_t *hwif)
999{
Bartlomiej Zolnierkiewicz6e875432008-04-27 15:38:30 +02001000 int i;
1001
Bartlomiej Zolnierkiewicz9fd91d92008-04-27 15:38:23 +02001002 if (ide_ignore_cable & (1 << hwif->index)) {
1003 printk(KERN_INFO "ide: ignoring cable detection for %s\n",
1004 hwif->name);
1005 hwif->cbl = ATA_CBL_PATA40_SHORT;
1006 }
Bartlomiej Zolnierkiewicz6e875432008-04-27 15:38:30 +02001007
1008 for (i = 0; i < MAX_DRIVES; i++)
1009 ide_dev_apply_params(&hwif->drives[i]);
Bartlomiej Zolnierkiewicz9fd91d92008-04-27 15:38:23 +02001010}
1011
Linus Torvalds1da177e2005-04-16 15:20:36 -07001012/*
1013 * This is gets invoked once during initialization, to set *everything* up
1014 */
1015static int __init ide_init(void)
1016{
Randy Dunlap349ae232006-10-03 01:14:23 -07001017 int ret;
1018
Bartlomiej Zolnierkiewiczeba8ff92008-02-11 00:32:13 +01001019 printk(KERN_INFO "Uniform Multi-Platform E-IDE driver\n");
Bartlomiej Zolnierkiewicz537f06c2008-02-01 23:09:35 +01001020
Randy Dunlap349ae232006-10-03 01:14:23 -07001021 ret = bus_register(&ide_bus_type);
1022 if (ret < 0) {
1023 printk(KERN_WARNING "IDE: bus_register error: %d\n", ret);
1024 return ret;
1025 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001026
Bartlomiej Zolnierkiewiczf74c9142008-04-18 00:46:23 +02001027 ide_port_class = class_create(THIS_MODULE, "ide_port");
1028 if (IS_ERR(ide_port_class)) {
1029 ret = PTR_ERR(ide_port_class);
1030 goto out_port_class;
1031 }
Bartlomiej Zolnierkiewiczf74c9142008-04-18 00:46:23 +02001032
Bartlomiej Zolnierkiewicz5cbf79c2007-05-10 00:01:11 +02001033 proc_ide_create();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001034
Linus Torvalds1da177e2005-04-16 15:20:36 -07001035 return 0;
Bartlomiej Zolnierkiewiczf74c9142008-04-18 00:46:23 +02001036
1037out_port_class:
1038 bus_unregister(&ide_bus_type);
1039
1040 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001041}
1042
Bartlomiej Zolnierkiewicz931ee0d2008-07-15 21:21:47 +02001043static void __exit ide_exit(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001044{
Linus Torvalds1da177e2005-04-16 15:20:36 -07001045 proc_ide_destroy();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001046
Bartlomiej Zolnierkiewiczf74c9142008-04-18 00:46:23 +02001047 class_destroy(ide_port_class);
1048
Linus Torvalds1da177e2005-04-16 15:20:36 -07001049 bus_unregister(&ide_bus_type);
1050}
1051
Linus Torvalds1da177e2005-04-16 15:20:36 -07001052module_init(ide_init);
Bartlomiej Zolnierkiewicz931ee0d2008-07-15 21:21:47 +02001053module_exit(ide_exit);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001054
Bartlomiej Zolnierkiewicz931ee0d2008-07-15 21:21:47 +02001055MODULE_LICENSE("GPL");