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Commit | Line | Data |
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1da177e4 | 1 | /* |
59bca8cc | 2 | * Copyright (C) 1994-1998 Linus Torvalds & authors (see below) |
fc410698 | 3 | * Copyright (C) 2003-2005, 2007 Bartlomiej Zolnierkiewicz |
1da177e4 LT |
4 | */ |
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 | * | |
1da177e4 LT |
18 | * ... |
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 | |
1da177e4 LT |
45 | */ |
46 | ||
1da177e4 LT |
47 | #include <linux/module.h> |
48 | #include <linux/types.h> | |
49 | #include <linux/string.h> | |
50 | #include <linux/kernel.h> | |
1da177e4 LT |
51 | #include <linux/interrupt.h> |
52 | #include <linux/major.h> | |
53 | #include <linux/errno.h> | |
54 | #include <linux/genhd.h> | |
1da177e4 LT |
55 | #include <linux/slab.h> |
56 | #include <linux/init.h> | |
57 | #include <linux/pci.h> | |
1da177e4 | 58 | #include <linux/ide.h> |
3ceca727 | 59 | #include <linux/hdreg.h> |
1da177e4 | 60 | #include <linux/completion.h> |
1da177e4 | 61 | #include <linux/device.h> |
1da177e4 LT |
62 | |
63 | ||
64 | /* default maximum number of failures */ | |
65 | #define IDE_DEFAULT_MAX_FAILURES 1 | |
66 | ||
f74c9141 BZ |
67 | struct class *ide_port_class; |
68 | ||
1da177e4 LT |
69 | static const u8 ide_hwif_to_major[] = { IDE0_MAJOR, IDE1_MAJOR, |
70 | IDE2_MAJOR, IDE3_MAJOR, | |
71 | IDE4_MAJOR, IDE5_MAJOR, | |
72 | IDE6_MAJOR, IDE7_MAJOR, | |
73 | IDE8_MAJOR, IDE9_MAJOR }; | |
74 | ||
ef29888e | 75 | DEFINE_MUTEX(ide_cfg_mtx); |
1da177e4 | 76 | |
931ee0dc BZ |
77 | __cacheline_aligned_in_smp DEFINE_SPINLOCK(ide_lock); |
78 | EXPORT_SYMBOL(ide_lock); | |
1da177e4 | 79 | |
43514ed1 BZ |
80 | static void ide_port_init_devices_data(ide_hwif_t *); |
81 | ||
1da177e4 LT |
82 | /* |
83 | * Do not even *think* about calling this! | |
84 | */ | |
cbb010c1 | 85 | void ide_init_port_data(ide_hwif_t *hwif, unsigned int index) |
1da177e4 | 86 | { |
1da177e4 LT |
87 | /* bulk initialize hwif & drive info with zeros */ |
88 | memset(hwif, 0, sizeof(ide_hwif_t)); | |
89 | ||
90 | /* fill in any non-zero initial values */ | |
91 | hwif->index = index; | |
92 | hwif->major = ide_hwif_to_major[index]; | |
93 | ||
94 | hwif->name[0] = 'i'; | |
95 | hwif->name[1] = 'd'; | |
96 | hwif->name[2] = 'e'; | |
97 | hwif->name[3] = '0' + index; | |
98 | ||
f36d4024 | 99 | init_completion(&hwif->gendev_rel_comp); |
1da177e4 | 100 | |
374e042c | 101 | hwif->tp_ops = &default_tp_ops; |
43514ed1 BZ |
102 | |
103 | ide_port_init_devices_data(hwif); | |
104 | } | |
43514ed1 BZ |
105 | |
106 | static void ide_port_init_devices_data(ide_hwif_t *hwif) | |
107 | { | |
108 | int unit; | |
109 | ||
1da177e4 LT |
110 | for (unit = 0; unit < MAX_DRIVES; ++unit) { |
111 | ide_drive_t *drive = &hwif->drives[unit]; | |
43514ed1 BZ |
112 | u8 j = (hwif->index * MAX_DRIVES) + unit; |
113 | ||
114 | memset(drive, 0, sizeof(*drive)); | |
1da177e4 LT |
115 | |
116 | drive->media = ide_disk; | |
117 | drive->select.all = (unit<<4)|0xa0; | |
118 | drive->hwif = hwif; | |
3a7d2484 | 119 | drive->ready_stat = ATA_DRDY; |
1da177e4 LT |
120 | drive->bad_wstat = BAD_W_STAT; |
121 | drive->special.b.recalibrate = 1; | |
122 | drive->special.b.set_geometry = 1; | |
123 | drive->name[0] = 'h'; | |
124 | drive->name[1] = 'd'; | |
43514ed1 | 125 | drive->name[2] = 'a' + j; |
1da177e4 | 126 | drive->max_failures = IDE_DEFAULT_MAX_FAILURES; |
43514ed1 | 127 | |
1da177e4 | 128 | INIT_LIST_HEAD(&drive->list); |
f36d4024 | 129 | init_completion(&drive->gendev_rel_comp); |
1da177e4 LT |
130 | } |
131 | } | |
43514ed1 | 132 | |
71bf9f6f | 133 | /* Called with ide_lock held. */ |
2dde7861 | 134 | static void __ide_port_unregister_devices(ide_hwif_t *hwif) |
71bf9f6f BZ |
135 | { |
136 | int i; | |
137 | ||
138 | for (i = 0; i < MAX_DRIVES; i++) { | |
139 | ide_drive_t *drive = &hwif->drives[i]; | |
140 | ||
141 | if (drive->present) { | |
142 | spin_unlock_irq(&ide_lock); | |
143 | device_unregister(&drive->gendev); | |
144 | wait_for_completion(&drive->gendev_rel_comp); | |
145 | spin_lock_irq(&ide_lock); | |
146 | } | |
147 | } | |
148 | } | |
149 | ||
2dde7861 BZ |
150 | void ide_port_unregister_devices(ide_hwif_t *hwif) |
151 | { | |
152 | mutex_lock(&ide_cfg_mtx); | |
153 | spin_lock_irq(&ide_lock); | |
154 | __ide_port_unregister_devices(hwif); | |
155 | hwif->present = 0; | |
156 | ide_port_init_devices_data(hwif); | |
157 | spin_unlock_irq(&ide_lock); | |
158 | mutex_unlock(&ide_cfg_mtx); | |
159 | } | |
160 | EXPORT_SYMBOL_GPL(ide_port_unregister_devices); | |
161 | ||
1da177e4 | 162 | /** |
020e322d | 163 | * ide_unregister - free an IDE interface |
387750c3 | 164 | * @hwif: IDE interface |
1da177e4 LT |
165 | * |
166 | * Perform the final unregister of an IDE interface. At the moment | |
167 | * we don't refcount interfaces so this will also get split up. | |
168 | * | |
169 | * Locking: | |
170 | * The caller must not hold the IDE locks | |
171 | * The drive present/vanishing is not yet properly locked | |
172 | * Take care with the callbacks. These have been split to avoid | |
173 | * deadlocking the IDE layer. The shutdown callback is called | |
174 | * before we take the lock and free resources. It is up to the | |
175 | * caller to be sure there is no pending I/O here, and that | |
020e322d SS |
176 | * the interface will not be reopened (present/vanishing locking |
177 | * isn't yet done BTW). After we commit to the final kill we | |
1da177e4 LT |
178 | * call the cleanup callback with the ide locks held. |
179 | * | |
180 | * Unregister restores the hwif structures to the default state. | |
181 | * This is raving bonkers. | |
182 | */ | |
183 | ||
387750c3 | 184 | void ide_unregister(ide_hwif_t *hwif) |
1da177e4 | 185 | { |
387750c3 | 186 | ide_hwif_t *g; |
1da177e4 | 187 | ide_hwgroup_t *hwgroup; |
71bf9f6f | 188 | int irq_count = 0; |
1da177e4 | 189 | |
1da177e4 LT |
190 | BUG_ON(in_interrupt()); |
191 | BUG_ON(irqs_disabled()); | |
bd8a59e2 | 192 | |
ef29888e | 193 | mutex_lock(&ide_cfg_mtx); |
1da177e4 | 194 | |
bd8a59e2 BZ |
195 | spin_lock_irq(&ide_lock); |
196 | if (hwif->present) { | |
197 | __ide_port_unregister_devices(hwif); | |
198 | hwif->present = 0; | |
199 | } | |
1da177e4 LT |
200 | spin_unlock_irq(&ide_lock); |
201 | ||
5cbf79cd | 202 | ide_proc_unregister_port(hwif); |
1da177e4 LT |
203 | |
204 | hwgroup = hwif->hwgroup; | |
205 | /* | |
206 | * free the irq if we were the only hwif using it | |
207 | */ | |
208 | g = hwgroup->hwif; | |
209 | do { | |
210 | if (g->irq == hwif->irq) | |
211 | ++irq_count; | |
212 | g = g->next; | |
213 | } while (g != hwgroup->hwif); | |
214 | if (irq_count == 1) | |
215 | free_irq(hwif->irq, hwgroup); | |
216 | ||
96e5ad30 | 217 | ide_remove_port_from_hwgroup(hwif); |
1da177e4 | 218 | |
f74c9141 | 219 | device_unregister(hwif->portdev); |
1da177e4 | 220 | device_unregister(&hwif->gendev); |
f36d4024 | 221 | wait_for_completion(&hwif->gendev_rel_comp); |
1da177e4 LT |
222 | |
223 | /* | |
224 | * Remove us from the kernel's knowledge | |
225 | */ | |
226 | blk_unregister_region(MKDEV(hwif->major, 0), MAX_DRIVES<<PARTN_BITS); | |
227 | kfree(hwif->sg_table); | |
228 | unregister_blkdev(hwif->major, hwif->name); | |
1da177e4 | 229 | |
93de00fd | 230 | if (hwif->dma_base) |
0d1bad21 | 231 | ide_release_dma_engine(hwif); |
1da177e4 | 232 | |
ef29888e | 233 | mutex_unlock(&ide_cfg_mtx); |
1da177e4 LT |
234 | } |
235 | ||
57c802e8 BZ |
236 | void ide_init_port_hw(ide_hwif_t *hwif, hw_regs_t *hw) |
237 | { | |
4c3032d8 | 238 | memcpy(&hwif->io_ports, &hw->io_ports, sizeof(hwif->io_ports)); |
57c802e8 | 239 | hwif->irq = hw->irq; |
57c802e8 | 240 | hwif->chipset = hw->chipset; |
c56c5648 BZ |
241 | hwif->dev = hw->dev; |
242 | hwif->gendev.parent = hw->parent ? hw->parent : hw->dev; | |
57c802e8 | 243 | hwif->ack_intr = hw->ack_intr; |
d6276b5f | 244 | hwif->config_data = hw->config; |
57c802e8 | 245 | } |
57c802e8 | 246 | |
1da177e4 LT |
247 | /* |
248 | * Locks for IDE setting functionality | |
249 | */ | |
250 | ||
f9383c42 | 251 | DEFINE_MUTEX(ide_setting_mtx); |
1da177e4 | 252 | |
1da177e4 LT |
253 | /** |
254 | * ide_spin_wait_hwgroup - wait for group | |
255 | * @drive: drive in the group | |
256 | * | |
257 | * Wait for an IDE device group to go non busy and then return | |
258 | * holding the ide_lock which guards the hwgroup->busy status | |
259 | * and right to use it. | |
260 | */ | |
261 | ||
262 | int ide_spin_wait_hwgroup (ide_drive_t *drive) | |
263 | { | |
264 | ide_hwgroup_t *hwgroup = HWGROUP(drive); | |
265 | unsigned long timeout = jiffies + (3 * HZ); | |
266 | ||
267 | spin_lock_irq(&ide_lock); | |
268 | ||
269 | while (hwgroup->busy) { | |
270 | unsigned long lflags; | |
271 | spin_unlock_irq(&ide_lock); | |
272 | local_irq_set(lflags); | |
273 | if (time_after(jiffies, timeout)) { | |
274 | local_irq_restore(lflags); | |
275 | printk(KERN_ERR "%s: channel busy\n", drive->name); | |
276 | return -EBUSY; | |
277 | } | |
278 | local_irq_restore(lflags); | |
279 | spin_lock_irq(&ide_lock); | |
280 | } | |
281 | return 0; | |
282 | } | |
283 | ||
284 | EXPORT_SYMBOL(ide_spin_wait_hwgroup); | |
285 | ||
8185d5aa BZ |
286 | ide_devset_get(io_32bit, io_32bit); |
287 | ||
7662d046 | 288 | int set_io_32bit(ide_drive_t *drive, int arg) |
1da177e4 | 289 | { |
1497943e BZ |
290 | if (drive->no_io_32bit) |
291 | return -EPERM; | |
292 | ||
293 | if (arg < 0 || arg > 1 + (SUPPORT_VLB_SYNC << 1)) | |
294 | return -EINVAL; | |
295 | ||
644a9d76 BZ |
296 | if (ide_spin_wait_hwgroup(drive)) |
297 | return -EBUSY; | |
298 | ||
1da177e4 | 299 | drive->io_32bit = arg; |
644a9d76 BZ |
300 | |
301 | spin_unlock_irq(&ide_lock); | |
302 | ||
1da177e4 LT |
303 | return 0; |
304 | } | |
305 | ||
8185d5aa BZ |
306 | ide_devset_get(ksettings, keep_settings); |
307 | ||
263138a0 | 308 | int set_ksettings(ide_drive_t *drive, int arg) |
1497943e BZ |
309 | { |
310 | if (arg < 0 || arg > 1) | |
311 | return -EINVAL; | |
312 | ||
313 | if (ide_spin_wait_hwgroup(drive)) | |
314 | return -EBUSY; | |
315 | drive->keep_settings = arg; | |
316 | spin_unlock_irq(&ide_lock); | |
317 | ||
318 | return 0; | |
319 | } | |
320 | ||
8185d5aa BZ |
321 | ide_devset_get(using_dma, using_dma); |
322 | ||
7662d046 | 323 | int set_using_dma(ide_drive_t *drive, int arg) |
1da177e4 LT |
324 | { |
325 | #ifdef CONFIG_BLK_DEV_IDEDMA | |
87996204 BZ |
326 | ide_hwif_t *hwif = drive->hwif; |
327 | int err = -EPERM; | |
328 | ||
1497943e BZ |
329 | if (arg < 0 || arg > 1) |
330 | return -EINVAL; | |
331 | ||
48fb2688 | 332 | if (ata_id_has_dma(drive->id) == 0) |
87996204 BZ |
333 | goto out; |
334 | ||
5e37bdc0 | 335 | if (hwif->dma_ops == NULL) |
87996204 BZ |
336 | goto out; |
337 | ||
338 | err = -EBUSY; | |
339 | if (ide_spin_wait_hwgroup(drive)) | |
340 | goto out; | |
341 | /* | |
342 | * set ->busy flag, unlock and let it ride | |
343 | */ | |
344 | hwif->hwgroup->busy = 1; | |
345 | spin_unlock_irq(&ide_lock); | |
346 | ||
347 | err = 0; | |
348 | ||
1da177e4 | 349 | if (arg) { |
23b1bd45 | 350 | if (ide_set_dma(drive)) |
87996204 | 351 | err = -EIO; |
7469aaf6 BZ |
352 | } else |
353 | ide_dma_off(drive); | |
87996204 BZ |
354 | |
355 | /* | |
356 | * lock, clear ->busy flag and unlock before leaving | |
357 | */ | |
358 | spin_lock_irq(&ide_lock); | |
359 | hwif->hwgroup->busy = 0; | |
360 | spin_unlock_irq(&ide_lock); | |
361 | out: | |
362 | return err; | |
1da177e4 | 363 | #else |
1497943e BZ |
364 | if (arg < 0 || arg > 1) |
365 | return -EINVAL; | |
366 | ||
1da177e4 LT |
367 | return -EPERM; |
368 | #endif | |
369 | } | |
370 | ||
7662d046 | 371 | int set_pio_mode(ide_drive_t *drive, int arg) |
1da177e4 | 372 | { |
5b114715 | 373 | struct request *rq; |
784506cb | 374 | ide_hwif_t *hwif = drive->hwif; |
ac95beed | 375 | const struct ide_port_ops *port_ops = hwif->port_ops; |
1da177e4 | 376 | |
1497943e BZ |
377 | if (arg < 0 || arg > 255) |
378 | return -EINVAL; | |
379 | ||
ac95beed | 380 | if (port_ops == NULL || port_ops->set_pio_mode == NULL || |
784506cb | 381 | (hwif->host_flags & IDE_HFLAG_NO_SET_MODE)) |
1da177e4 | 382 | return -ENOSYS; |
26bcb879 | 383 | |
1da177e4 LT |
384 | if (drive->special.b.set_tune) |
385 | return -EBUSY; | |
145b75e9 | 386 | |
5b114715 FT |
387 | rq = blk_get_request(drive->queue, READ, __GFP_WAIT); |
388 | rq->cmd_type = REQ_TYPE_ATA_TASKFILE; | |
145b75e9 | 389 | |
1da177e4 LT |
390 | drive->tune_req = (u8) arg; |
391 | drive->special.b.set_tune = 1; | |
5b114715 FT |
392 | |
393 | blk_execute_rq(drive->queue, NULL, rq, 0); | |
394 | blk_put_request(rq); | |
395 | ||
1da177e4 LT |
396 | return 0; |
397 | } | |
398 | ||
8185d5aa BZ |
399 | ide_devset_get(unmaskirq, unmask); |
400 | ||
263138a0 | 401 | int set_unmaskirq(ide_drive_t *drive, int arg) |
1497943e BZ |
402 | { |
403 | if (drive->no_unmask) | |
404 | return -EPERM; | |
405 | ||
406 | if (arg < 0 || arg > 1) | |
407 | return -EINVAL; | |
408 | ||
409 | if (ide_spin_wait_hwgroup(drive)) | |
410 | return -EBUSY; | |
411 | drive->unmask = arg; | |
412 | spin_unlock_irq(&ide_lock); | |
413 | ||
414 | return 0; | |
415 | } | |
416 | ||
b887d2e6 | 417 | static int generic_ide_suspend(struct device *dev, pm_message_t mesg) |
1da177e4 LT |
418 | { |
419 | ide_drive_t *drive = dev->driver_data; | |
e3a59b4d | 420 | ide_hwif_t *hwif = HWIF(drive); |
5b114715 | 421 | struct request *rq; |
1da177e4 LT |
422 | struct request_pm_state rqpm; |
423 | ide_task_t args; | |
5e32132b | 424 | int ret; |
1da177e4 | 425 | |
e3a59b4d HR |
426 | /* Call ACPI _GTM only once */ |
427 | if (!(drive->dn % 2)) | |
428 | ide_acpi_get_timing(hwif); | |
429 | ||
1da177e4 LT |
430 | memset(&rqpm, 0, sizeof(rqpm)); |
431 | memset(&args, 0, sizeof(args)); | |
5b114715 FT |
432 | rq = blk_get_request(drive->queue, READ, __GFP_WAIT); |
433 | rq->cmd_type = REQ_TYPE_PM_SUSPEND; | |
434 | rq->special = &args; | |
435 | rq->data = &rqpm; | |
1da177e4 | 436 | rqpm.pm_step = ide_pm_state_start_suspend; |
b887d2e6 DB |
437 | if (mesg.event == PM_EVENT_PRETHAW) |
438 | mesg.event = PM_EVENT_FREEZE; | |
439 | rqpm.pm_state = mesg.event; | |
1da177e4 | 440 | |
5b114715 FT |
441 | ret = blk_execute_rq(drive->queue, NULL, rq, 0); |
442 | blk_put_request(rq); | |
5e32132b SL |
443 | /* only call ACPI _PS3 after both drivers are suspended */ |
444 | if (!ret && (((drive->dn % 2) && hwif->drives[0].present | |
445 | && hwif->drives[1].present) | |
446 | || !hwif->drives[0].present | |
447 | || !hwif->drives[1].present)) | |
448 | ide_acpi_set_state(hwif, 0); | |
449 | return ret; | |
1da177e4 LT |
450 | } |
451 | ||
452 | static int generic_ide_resume(struct device *dev) | |
453 | { | |
454 | ide_drive_t *drive = dev->driver_data; | |
e3a59b4d | 455 | ide_hwif_t *hwif = HWIF(drive); |
5b114715 | 456 | struct request *rq; |
1da177e4 LT |
457 | struct request_pm_state rqpm; |
458 | ide_task_t args; | |
0d2157f7 | 459 | int err; |
1da177e4 | 460 | |
e3a59b4d | 461 | /* Call ACPI _STM only once */ |
5e32132b SL |
462 | if (!(drive->dn % 2)) { |
463 | ide_acpi_set_state(hwif, 1); | |
e3a59b4d | 464 | ide_acpi_push_timing(hwif); |
5e32132b | 465 | } |
e3a59b4d HR |
466 | |
467 | ide_acpi_exec_tfs(drive); | |
468 | ||
1da177e4 LT |
469 | memset(&rqpm, 0, sizeof(rqpm)); |
470 | memset(&args, 0, sizeof(args)); | |
5b114715 FT |
471 | rq = blk_get_request(drive->queue, READ, __GFP_WAIT); |
472 | rq->cmd_type = REQ_TYPE_PM_RESUME; | |
473 | rq->cmd_flags |= REQ_PREEMPT; | |
474 | rq->special = &args; | |
475 | rq->data = &rqpm; | |
1da177e4 | 476 | rqpm.pm_step = ide_pm_state_start_resume; |
ca078bae | 477 | rqpm.pm_state = PM_EVENT_ON; |
1da177e4 | 478 | |
5b114715 FT |
479 | err = blk_execute_rq(drive->queue, NULL, rq, 1); |
480 | blk_put_request(rq); | |
0d2157f7 | 481 | |
ce9b2b0a RW |
482 | if (err == 0 && dev->driver) { |
483 | ide_driver_t *drv = to_ide_driver(dev->driver); | |
484 | ||
485 | if (drv->resume) | |
486 | drv->resume(drive); | |
487 | } | |
0d2157f7 LT |
488 | |
489 | return err; | |
1da177e4 LT |
490 | } |
491 | ||
08da591e BZ |
492 | /** |
493 | * ide_device_get - get an additional reference to a ide_drive_t | |
494 | * @drive: device to get a reference to | |
495 | * | |
496 | * Gets a reference to the ide_drive_t and increments the use count of the | |
497 | * underlying LLDD module. | |
498 | */ | |
499 | int ide_device_get(ide_drive_t *drive) | |
500 | { | |
501 | struct device *host_dev; | |
502 | struct module *module; | |
503 | ||
504 | if (!get_device(&drive->gendev)) | |
505 | return -ENXIO; | |
506 | ||
507 | host_dev = drive->hwif->host->dev[0]; | |
508 | module = host_dev ? host_dev->driver->owner : NULL; | |
509 | ||
510 | if (module && !try_module_get(module)) { | |
511 | put_device(&drive->gendev); | |
512 | return -ENXIO; | |
513 | } | |
514 | ||
515 | return 0; | |
516 | } | |
517 | EXPORT_SYMBOL_GPL(ide_device_get); | |
518 | ||
519 | /** | |
520 | * ide_device_put - release a reference to a ide_drive_t | |
521 | * @drive: device to release a reference on | |
522 | * | |
523 | * Release a reference to the ide_drive_t and decrements the use count of | |
524 | * the underlying LLDD module. | |
525 | */ | |
526 | void ide_device_put(ide_drive_t *drive) | |
527 | { | |
528 | #ifdef CONFIG_MODULE_UNLOAD | |
529 | struct device *host_dev = drive->hwif->host->dev[0]; | |
530 | struct module *module = host_dev ? host_dev->driver->owner : NULL; | |
531 | ||
532 | if (module) | |
533 | module_put(module); | |
534 | #endif | |
535 | put_device(&drive->gendev); | |
536 | } | |
537 | EXPORT_SYMBOL_GPL(ide_device_put); | |
538 | ||
8604affd BZ |
539 | static int ide_bus_match(struct device *dev, struct device_driver *drv) |
540 | { | |
541 | return 1; | |
542 | } | |
543 | ||
263756ec KS |
544 | static char *media_string(ide_drive_t *drive) |
545 | { | |
546 | switch (drive->media) { | |
547 | case ide_disk: | |
548 | return "disk"; | |
549 | case ide_cdrom: | |
550 | return "cdrom"; | |
551 | case ide_tape: | |
552 | return "tape"; | |
553 | case ide_floppy: | |
554 | return "floppy"; | |
a7a832de DK |
555 | case ide_optical: |
556 | return "optical"; | |
263756ec KS |
557 | default: |
558 | return "UNKNOWN"; | |
559 | } | |
560 | } | |
561 | ||
562 | static ssize_t media_show(struct device *dev, struct device_attribute *attr, char *buf) | |
563 | { | |
564 | ide_drive_t *drive = to_ide_device(dev); | |
565 | return sprintf(buf, "%s\n", media_string(drive)); | |
566 | } | |
567 | ||
568 | static ssize_t drivename_show(struct device *dev, struct device_attribute *attr, char *buf) | |
569 | { | |
570 | ide_drive_t *drive = to_ide_device(dev); | |
571 | return sprintf(buf, "%s\n", drive->name); | |
572 | } | |
573 | ||
574 | static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf) | |
575 | { | |
576 | ide_drive_t *drive = to_ide_device(dev); | |
577 | return sprintf(buf, "ide:m-%s\n", media_string(drive)); | |
578 | } | |
579 | ||
e11b9035 BZ |
580 | static ssize_t model_show(struct device *dev, struct device_attribute *attr, |
581 | char *buf) | |
582 | { | |
583 | ide_drive_t *drive = to_ide_device(dev); | |
4dde4492 | 584 | return sprintf(buf, "%s\n", (char *)&drive->id[ATA_ID_PROD]); |
e11b9035 BZ |
585 | } |
586 | ||
587 | static ssize_t firmware_show(struct device *dev, struct device_attribute *attr, | |
588 | char *buf) | |
589 | { | |
590 | ide_drive_t *drive = to_ide_device(dev); | |
4dde4492 | 591 | return sprintf(buf, "%s\n", (char *)&drive->id[ATA_ID_FW_REV]); |
e11b9035 BZ |
592 | } |
593 | ||
594 | static ssize_t serial_show(struct device *dev, struct device_attribute *attr, | |
595 | char *buf) | |
596 | { | |
597 | ide_drive_t *drive = to_ide_device(dev); | |
4dde4492 | 598 | return sprintf(buf, "%s\n", (char *)&drive->id[ATA_ID_SERNO]); |
e11b9035 BZ |
599 | } |
600 | ||
263756ec KS |
601 | static struct device_attribute ide_dev_attrs[] = { |
602 | __ATTR_RO(media), | |
603 | __ATTR_RO(drivename), | |
604 | __ATTR_RO(modalias), | |
e11b9035 BZ |
605 | __ATTR_RO(model), |
606 | __ATTR_RO(firmware), | |
607 | __ATTR(serial, 0400, serial_show, NULL), | |
263756ec KS |
608 | __ATTR_NULL |
609 | }; | |
610 | ||
7eff2e7a | 611 | static int ide_uevent(struct device *dev, struct kobj_uevent_env *env) |
263756ec KS |
612 | { |
613 | ide_drive_t *drive = to_ide_device(dev); | |
7eff2e7a KS |
614 | |
615 | add_uevent_var(env, "MEDIA=%s", media_string(drive)); | |
616 | add_uevent_var(env, "DRIVENAME=%s", drive->name); | |
617 | add_uevent_var(env, "MODALIAS=ide:m-%s", media_string(drive)); | |
263756ec KS |
618 | return 0; |
619 | } | |
620 | ||
4031bbe4 RK |
621 | static int generic_ide_probe(struct device *dev) |
622 | { | |
623 | ide_drive_t *drive = to_ide_device(dev); | |
624 | ide_driver_t *drv = to_ide_driver(dev->driver); | |
625 | ||
626 | return drv->probe ? drv->probe(drive) : -ENODEV; | |
627 | } | |
628 | ||
629 | static int generic_ide_remove(struct device *dev) | |
630 | { | |
631 | ide_drive_t *drive = to_ide_device(dev); | |
632 | ide_driver_t *drv = to_ide_driver(dev->driver); | |
633 | ||
634 | if (drv->remove) | |
635 | drv->remove(drive); | |
636 | ||
637 | return 0; | |
638 | } | |
639 | ||
640 | static void generic_ide_shutdown(struct device *dev) | |
641 | { | |
642 | ide_drive_t *drive = to_ide_device(dev); | |
643 | ide_driver_t *drv = to_ide_driver(dev->driver); | |
644 | ||
645 | if (dev->driver && drv->shutdown) | |
646 | drv->shutdown(drive); | |
647 | } | |
648 | ||
1da177e4 LT |
649 | struct bus_type ide_bus_type = { |
650 | .name = "ide", | |
8604affd | 651 | .match = ide_bus_match, |
263756ec | 652 | .uevent = ide_uevent, |
4031bbe4 RK |
653 | .probe = generic_ide_probe, |
654 | .remove = generic_ide_remove, | |
655 | .shutdown = generic_ide_shutdown, | |
263756ec | 656 | .dev_attrs = ide_dev_attrs, |
1da177e4 LT |
657 | .suspend = generic_ide_suspend, |
658 | .resume = generic_ide_resume, | |
659 | }; | |
660 | ||
8604affd BZ |
661 | EXPORT_SYMBOL_GPL(ide_bus_type); |
662 | ||
ebae41a5 BZ |
663 | int ide_vlb_clk; |
664 | EXPORT_SYMBOL_GPL(ide_vlb_clk); | |
665 | ||
666 | module_param_named(vlb_clock, ide_vlb_clk, int, 0); | |
667 | MODULE_PARM_DESC(vlb_clock, "VLB clock frequency (in MHz)"); | |
668 | ||
669 | int ide_pci_clk; | |
670 | EXPORT_SYMBOL_GPL(ide_pci_clk); | |
671 | ||
672 | module_param_named(pci_clock, ide_pci_clk, int, 0); | |
673 | MODULE_PARM_DESC(pci_clock, "PCI bus clock frequency (in MHz)"); | |
674 | ||
6e87543a BZ |
675 | static int ide_set_dev_param_mask(const char *s, struct kernel_param *kp) |
676 | { | |
677 | int a, b, i, j = 1; | |
678 | unsigned int *dev_param_mask = (unsigned int *)kp->arg; | |
679 | ||
680 | if (sscanf(s, "%d.%d:%d", &a, &b, &j) != 3 && | |
681 | sscanf(s, "%d.%d", &a, &b) != 2) | |
682 | return -EINVAL; | |
683 | ||
684 | i = a * MAX_DRIVES + b; | |
685 | ||
686 | if (i >= MAX_HWIFS * MAX_DRIVES || j < 0 || j > 1) | |
687 | return -EINVAL; | |
688 | ||
689 | if (j) | |
690 | *dev_param_mask |= (1 << i); | |
691 | else | |
692 | *dev_param_mask &= (1 << i); | |
693 | ||
694 | return 0; | |
695 | } | |
696 | ||
697 | static unsigned int ide_nodma; | |
698 | ||
699 | module_param_call(nodma, ide_set_dev_param_mask, NULL, &ide_nodma, 0); | |
700 | MODULE_PARM_DESC(nodma, "disallow DMA for a device"); | |
701 | ||
702 | static unsigned int ide_noflush; | |
703 | ||
704 | module_param_call(noflush, ide_set_dev_param_mask, NULL, &ide_noflush, 0); | |
705 | MODULE_PARM_DESC(noflush, "disable flush requests for a device"); | |
706 | ||
707 | static unsigned int ide_noprobe; | |
708 | ||
709 | module_param_call(noprobe, ide_set_dev_param_mask, NULL, &ide_noprobe, 0); | |
710 | MODULE_PARM_DESC(noprobe, "skip probing for a device"); | |
711 | ||
712 | static unsigned int ide_nowerr; | |
713 | ||
714 | module_param_call(nowerr, ide_set_dev_param_mask, NULL, &ide_nowerr, 0); | |
3a7d2484 | 715 | MODULE_PARM_DESC(nowerr, "ignore the ATA_DF bit for a device"); |
6e87543a | 716 | |
4706a7e0 BZ |
717 | static unsigned int ide_cdroms; |
718 | ||
719 | module_param_call(cdrom, ide_set_dev_param_mask, NULL, &ide_cdroms, 0); | |
720 | MODULE_PARM_DESC(cdrom, "force device as a CD-ROM"); | |
721 | ||
722 | struct chs_geom { | |
723 | unsigned int cyl; | |
724 | u8 head; | |
725 | u8 sect; | |
726 | }; | |
727 | ||
728 | static unsigned int ide_disks; | |
729 | static struct chs_geom ide_disks_chs[MAX_HWIFS * MAX_DRIVES]; | |
730 | ||
731 | static int ide_set_disk_chs(const char *str, struct kernel_param *kp) | |
732 | { | |
733 | int a, b, c = 0, h = 0, s = 0, i, j = 1; | |
734 | ||
735 | if (sscanf(str, "%d.%d:%d,%d,%d", &a, &b, &c, &h, &s) != 5 && | |
736 | sscanf(str, "%d.%d:%d", &a, &b, &j) != 3) | |
737 | return -EINVAL; | |
738 | ||
739 | i = a * MAX_DRIVES + b; | |
740 | ||
741 | if (i >= MAX_HWIFS * MAX_DRIVES || j < 0 || j > 1) | |
742 | return -EINVAL; | |
743 | ||
744 | if (c > INT_MAX || h > 255 || s > 255) | |
745 | return -EINVAL; | |
746 | ||
747 | if (j) | |
748 | ide_disks |= (1 << i); | |
749 | else | |
750 | ide_disks &= (1 << i); | |
751 | ||
752 | ide_disks_chs[i].cyl = c; | |
753 | ide_disks_chs[i].head = h; | |
754 | ide_disks_chs[i].sect = s; | |
755 | ||
756 | return 0; | |
757 | } | |
758 | ||
759 | module_param_call(chs, ide_set_disk_chs, NULL, NULL, 0); | |
760 | MODULE_PARM_DESC(chs, "force device as a disk (using CHS)"); | |
761 | ||
6e87543a BZ |
762 | static void ide_dev_apply_params(ide_drive_t *drive) |
763 | { | |
764 | int i = drive->hwif->index * MAX_DRIVES + drive->select.b.unit; | |
765 | ||
766 | if (ide_nodma & (1 << i)) { | |
767 | printk(KERN_INFO "ide: disallowing DMA for %s\n", drive->name); | |
768 | drive->nodma = 1; | |
769 | } | |
770 | if (ide_noflush & (1 << i)) { | |
771 | printk(KERN_INFO "ide: disabling flush requests for %s\n", | |
772 | drive->name); | |
773 | drive->noflush = 1; | |
774 | } | |
775 | if (ide_noprobe & (1 << i)) { | |
776 | printk(KERN_INFO "ide: skipping probe for %s\n", drive->name); | |
777 | drive->noprobe = 1; | |
778 | } | |
779 | if (ide_nowerr & (1 << i)) { | |
3a7d2484 | 780 | printk(KERN_INFO "ide: ignoring the ATA_DF bit for %s\n", |
6e87543a BZ |
781 | drive->name); |
782 | drive->bad_wstat = BAD_R_STAT; | |
783 | } | |
4706a7e0 BZ |
784 | if (ide_cdroms & (1 << i)) { |
785 | printk(KERN_INFO "ide: forcing %s as a CD-ROM\n", drive->name); | |
786 | drive->present = 1; | |
787 | drive->media = ide_cdrom; | |
788 | /* an ATAPI device ignores DRDY */ | |
789 | drive->ready_stat = 0; | |
790 | } | |
791 | if (ide_disks & (1 << i)) { | |
792 | drive->cyl = drive->bios_cyl = ide_disks_chs[i].cyl; | |
793 | drive->head = drive->bios_head = ide_disks_chs[i].head; | |
794 | drive->sect = drive->bios_sect = ide_disks_chs[i].sect; | |
795 | drive->forced_geom = 1; | |
796 | printk(KERN_INFO "ide: forcing %s as a disk (%d/%d/%d)\n", | |
797 | drive->name, | |
798 | drive->cyl, drive->head, drive->sect); | |
799 | drive->present = 1; | |
800 | drive->media = ide_disk; | |
3a7d2484 | 801 | drive->ready_stat = ATA_DRDY; |
4706a7e0 | 802 | } |
6e87543a BZ |
803 | } |
804 | ||
9fd91d95 BZ |
805 | static unsigned int ide_ignore_cable; |
806 | ||
807 | static int ide_set_ignore_cable(const char *s, struct kernel_param *kp) | |
808 | { | |
809 | int i, j = 1; | |
810 | ||
811 | if (sscanf(s, "%d:%d", &i, &j) != 2 && sscanf(s, "%d", &i) != 1) | |
812 | return -EINVAL; | |
813 | ||
814 | if (i >= MAX_HWIFS || j < 0 || j > 1) | |
815 | return -EINVAL; | |
816 | ||
817 | if (j) | |
818 | ide_ignore_cable |= (1 << i); | |
819 | else | |
820 | ide_ignore_cable &= (1 << i); | |
821 | ||
822 | return 0; | |
823 | } | |
824 | ||
825 | module_param_call(ignore_cable, ide_set_ignore_cable, NULL, NULL, 0); | |
826 | MODULE_PARM_DESC(ignore_cable, "ignore cable detection"); | |
827 | ||
828 | void ide_port_apply_params(ide_hwif_t *hwif) | |
829 | { | |
6e87543a BZ |
830 | int i; |
831 | ||
9fd91d95 BZ |
832 | if (ide_ignore_cable & (1 << hwif->index)) { |
833 | printk(KERN_INFO "ide: ignoring cable detection for %s\n", | |
834 | hwif->name); | |
835 | hwif->cbl = ATA_CBL_PATA40_SHORT; | |
836 | } | |
6e87543a BZ |
837 | |
838 | for (i = 0; i < MAX_DRIVES; i++) | |
839 | ide_dev_apply_params(&hwif->drives[i]); | |
9fd91d95 BZ |
840 | } |
841 | ||
1da177e4 LT |
842 | /* |
843 | * This is gets invoked once during initialization, to set *everything* up | |
844 | */ | |
845 | static int __init ide_init(void) | |
846 | { | |
349ae23f RD |
847 | int ret; |
848 | ||
eba8ff94 | 849 | printk(KERN_INFO "Uniform Multi-Platform E-IDE driver\n"); |
537f06c5 | 850 | |
349ae23f RD |
851 | ret = bus_register(&ide_bus_type); |
852 | if (ret < 0) { | |
853 | printk(KERN_WARNING "IDE: bus_register error: %d\n", ret); | |
854 | return ret; | |
855 | } | |
1da177e4 | 856 | |
f74c9141 BZ |
857 | ide_port_class = class_create(THIS_MODULE, "ide_port"); |
858 | if (IS_ERR(ide_port_class)) { | |
859 | ret = PTR_ERR(ide_port_class); | |
860 | goto out_port_class; | |
861 | } | |
f74c9141 | 862 | |
5cbf79cd | 863 | proc_ide_create(); |
1da177e4 | 864 | |
1da177e4 | 865 | return 0; |
f74c9141 BZ |
866 | |
867 | out_port_class: | |
868 | bus_unregister(&ide_bus_type); | |
869 | ||
870 | return ret; | |
1da177e4 LT |
871 | } |
872 | ||
931ee0dc | 873 | static void __exit ide_exit(void) |
1da177e4 | 874 | { |
1da177e4 | 875 | proc_ide_destroy(); |
1da177e4 | 876 | |
f74c9141 BZ |
877 | class_destroy(ide_port_class); |
878 | ||
1da177e4 LT |
879 | bus_unregister(&ide_bus_type); |
880 | } | |
881 | ||
1da177e4 | 882 | module_init(ide_init); |
931ee0dc | 883 | module_exit(ide_exit); |
1da177e4 | 884 | |
931ee0dc | 885 | MODULE_LICENSE("GPL"); |