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Commit | Line | Data |
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1da177e4 | 1 | /* |
59bca8cc BZ |
2 | * Copyright (C) 1994-1998 Linus Torvalds & authors (see below) |
3 | * Copyrifht (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 | #define _IDE_C /* Tell ide.h it's really us */ |
48 | ||
1da177e4 LT |
49 | #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> | |
1da177e4 LT |
65 | #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 | ||
f74c9141 BZ |
81 | struct class *ide_port_class; |
82 | ||
1da177e4 LT |
83 | static 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 | ||
89 | static int idebus_parameter; /* holds the "idebus=" parameter */ | |
90 | static int system_bus_speed; /* holds what we think is VESA/PCI bus speed */ | |
1da177e4 | 91 | |
ef29888e | 92 | DEFINE_MUTEX(ide_cfg_mtx); |
1da177e4 LT |
93 | __cacheline_aligned_in_smp DEFINE_SPINLOCK(ide_lock); |
94 | ||
1da177e4 | 95 | int noautodma = 0; |
1da177e4 | 96 | |
1da177e4 | 97 | ide_hwif_t ide_hwifs[MAX_HWIFS]; /* master data repository */ |
1da177e4 | 98 | |
43514ed1 BZ |
99 | static void ide_port_init_devices_data(ide_hwif_t *); |
100 | ||
1da177e4 LT |
101 | /* |
102 | * Do not even *think* about calling this! | |
103 | */ | |
cbb010c1 | 104 | void ide_init_port_data(ide_hwif_t *hwif, unsigned int index) |
1da177e4 | 105 | { |
1da177e4 LT |
106 | /* 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 | ||
f36d4024 | 120 | init_completion(&hwif->gendev_rel_comp); |
1da177e4 LT |
121 | |
122 | default_hwif_iops(hwif); | |
123 | default_hwif_transport(hwif); | |
43514ed1 BZ |
124 | |
125 | ide_port_init_devices_data(hwif); | |
126 | } | |
127 | EXPORT_SYMBOL_GPL(ide_init_port_data); | |
128 | ||
129 | static void ide_port_init_devices_data(ide_hwif_t *hwif) | |
130 | { | |
131 | int unit; | |
132 | ||
1da177e4 LT |
133 | for (unit = 0; unit < MAX_DRIVES; ++unit) { |
134 | ide_drive_t *drive = &hwif->drives[unit]; | |
43514ed1 BZ |
135 | u8 j = (hwif->index * MAX_DRIVES) + unit; |
136 | ||
137 | memset(drive, 0, sizeof(*drive)); | |
1da177e4 LT |
138 | |
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'; | |
43514ed1 | 149 | drive->name[2] = 'a' + j; |
1da177e4 | 150 | drive->max_failures = IDE_DEFAULT_MAX_FAILURES; |
43514ed1 | 151 | |
1da177e4 | 152 | INIT_LIST_HEAD(&drive->list); |
f36d4024 | 153 | init_completion(&drive->gendev_rel_comp); |
1da177e4 LT |
154 | } |
155 | } | |
43514ed1 | 156 | |
1da177e4 LT |
157 | /* |
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 | |
175 | static void __init init_ide_data (void) | |
176 | { | |
1da177e4 LT |
177 | 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) { | |
05734266 BZ |
186 | ide_hwif_t *hwif = &ide_hwifs[index]; |
187 | ||
cbb010c1 | 188 | ide_init_port_data(hwif, index); |
1da177e4 | 189 | } |
1da177e4 LT |
190 | } |
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 | ||
205 | static 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 | ||
537f06c5 BZ |
216 | /* 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; | |
1da177e4 LT |
222 | } |
223 | ||
fbd13088 | 224 | void ide_remove_port_from_hwgroup(ide_hwif_t *hwif) |
96e5ad30 BZ |
225 | { |
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 | ||
71bf9f6f | 259 | /* Called with ide_lock held. */ |
2dde7861 | 260 | static void __ide_port_unregister_devices(ide_hwif_t *hwif) |
71bf9f6f BZ |
261 | { |
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 | ||
2dde7861 BZ |
276 | void 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 | } | |
286 | EXPORT_SYMBOL_GPL(ide_port_unregister_devices); | |
287 | ||
1da177e4 | 288 | /** |
020e322d | 289 | * ide_unregister - free an IDE interface |
387750c3 | 290 | * @hwif: IDE interface |
1da177e4 LT |
291 | * |
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 | |
020e322d SS |
302 | * the interface will not be reopened (present/vanishing locking |
303 | * isn't yet done BTW). After we commit to the final kill we | |
1da177e4 LT |
304 | * 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 | ||
387750c3 | 310 | void ide_unregister(ide_hwif_t *hwif) |
1da177e4 | 311 | { |
387750c3 | 312 | ide_hwif_t *g; |
1da177e4 | 313 | ide_hwgroup_t *hwgroup; |
71bf9f6f | 314 | int irq_count = 0; |
1da177e4 | 315 | |
1da177e4 LT |
316 | BUG_ON(in_interrupt()); |
317 | BUG_ON(irqs_disabled()); | |
ef29888e | 318 | mutex_lock(&ide_cfg_mtx); |
1da177e4 | 319 | spin_lock_irq(&ide_lock); |
1da177e4 LT |
320 | if (!hwif->present) |
321 | goto abort; | |
2dde7861 | 322 | __ide_port_unregister_devices(hwif); |
1da177e4 LT |
323 | hwif->present = 0; |
324 | ||
325 | spin_unlock_irq(&ide_lock); | |
326 | ||
5cbf79cd | 327 | ide_proc_unregister_port(hwif); |
1da177e4 LT |
328 | |
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 | ||
96e5ad30 | 342 | ide_remove_port_from_hwgroup(hwif); |
1da177e4 | 343 | |
f74c9141 | 344 | device_unregister(hwif->portdev); |
1da177e4 | 345 | device_unregister(&hwif->gendev); |
f36d4024 | 346 | wait_for_completion(&hwif->gendev_rel_comp); |
1da177e4 LT |
347 | |
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 | ||
93de00fd | 356 | if (hwif->dma_base) |
0d1bad21 | 357 | ide_release_dma_engine(hwif); |
1da177e4 | 358 | |
1da177e4 | 359 | /* restore hwif data to pristine status */ |
387750c3 | 360 | ide_init_port_data(hwif, hwif->index); |
1da177e4 | 361 | |
1da177e4 LT |
362 | abort: |
363 | spin_unlock_irq(&ide_lock); | |
ef29888e | 364 | mutex_unlock(&ide_cfg_mtx); |
1da177e4 LT |
365 | } |
366 | ||
367 | EXPORT_SYMBOL(ide_unregister); | |
368 | ||
57c802e8 BZ |
369 | void ide_init_port_hw(ide_hwif_t *hwif, hw_regs_t *hw) |
370 | { | |
4c3032d8 | 371 | memcpy(&hwif->io_ports, &hw->io_ports, sizeof(hwif->io_ports)); |
57c802e8 | 372 | hwif->irq = hw->irq; |
57c802e8 BZ |
373 | hwif->chipset = hw->chipset; |
374 | hwif->gendev.parent = hw->dev; | |
375 | hwif->ack_intr = hw->ack_intr; | |
376 | } | |
377 | EXPORT_SYMBOL_GPL(ide_init_port_hw); | |
378 | ||
1da177e4 LT |
379 | /* |
380 | * Locks for IDE setting functionality | |
381 | */ | |
382 | ||
f9383c42 | 383 | DEFINE_MUTEX(ide_setting_mtx); |
1da177e4 | 384 | |
f9383c42 | 385 | EXPORT_SYMBOL_GPL(ide_setting_mtx); |
1497943e | 386 | |
1da177e4 LT |
387 | /** |
388 | * 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 | ||
396 | int 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 | ||
418 | EXPORT_SYMBOL(ide_spin_wait_hwgroup); | |
419 | ||
7662d046 | 420 | int set_io_32bit(ide_drive_t *drive, int arg) |
1da177e4 | 421 | { |
1497943e BZ |
422 | if (drive->no_io_32bit) |
423 | return -EPERM; | |
424 | ||
425 | if (arg < 0 || arg > 1 + (SUPPORT_VLB_SYNC << 1)) | |
426 | return -EINVAL; | |
427 | ||
644a9d76 BZ |
428 | if (ide_spin_wait_hwgroup(drive)) |
429 | return -EBUSY; | |
430 | ||
1da177e4 | 431 | drive->io_32bit = arg; |
644a9d76 BZ |
432 | |
433 | spin_unlock_irq(&ide_lock); | |
434 | ||
1da177e4 LT |
435 | return 0; |
436 | } | |
437 | ||
1497943e BZ |
438 | static 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 | ||
7662d046 | 451 | int set_using_dma(ide_drive_t *drive, int arg) |
1da177e4 LT |
452 | { |
453 | #ifdef CONFIG_BLK_DEV_IDEDMA | |
87996204 BZ |
454 | ide_hwif_t *hwif = drive->hwif; |
455 | int err = -EPERM; | |
456 | ||
1497943e BZ |
457 | if (arg < 0 || arg > 1) |
458 | return -EINVAL; | |
459 | ||
1da177e4 | 460 | if (!drive->id || !(drive->id->capability & 1)) |
87996204 BZ |
461 | goto out; |
462 | ||
5e37bdc0 | 463 | if (hwif->dma_ops == NULL) |
87996204 BZ |
464 | 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 | ||
1da177e4 | 477 | if (arg) { |
23b1bd45 | 478 | if (ide_set_dma(drive)) |
87996204 | 479 | err = -EIO; |
7469aaf6 BZ |
480 | } else |
481 | ide_dma_off(drive); | |
87996204 BZ |
482 | |
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); | |
489 | out: | |
490 | return err; | |
1da177e4 | 491 | #else |
1497943e BZ |
492 | if (arg < 0 || arg > 1) |
493 | return -EINVAL; | |
494 | ||
1da177e4 LT |
495 | return -EPERM; |
496 | #endif | |
497 | } | |
498 | ||
7662d046 | 499 | int set_pio_mode(ide_drive_t *drive, int arg) |
1da177e4 LT |
500 | { |
501 | struct request rq; | |
784506cb | 502 | ide_hwif_t *hwif = drive->hwif; |
ac95beed | 503 | const struct ide_port_ops *port_ops = hwif->port_ops; |
1da177e4 | 504 | |
1497943e BZ |
505 | if (arg < 0 || arg > 255) |
506 | return -EINVAL; | |
507 | ||
ac95beed | 508 | if (port_ops == NULL || port_ops->set_pio_mode == NULL || |
784506cb | 509 | (hwif->host_flags & IDE_HFLAG_NO_SET_MODE)) |
1da177e4 | 510 | return -ENOSYS; |
26bcb879 | 511 | |
1da177e4 LT |
512 | if (drive->special.b.set_tune) |
513 | return -EBUSY; | |
145b75e9 | 514 | |
1da177e4 | 515 | ide_init_drive_cmd(&rq); |
852738f3 | 516 | rq.cmd_type = REQ_TYPE_ATA_TASKFILE; |
145b75e9 | 517 | |
1da177e4 LT |
518 | 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 | ||
1497943e BZ |
524 | static 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 | ||
1da177e4 LT |
540 | /** |
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 | ||
547 | int system_bus_clock (void) | |
548 | { | |
537f06c5 | 549 | return system_bus_speed; |
1da177e4 LT |
550 | } |
551 | ||
552 | EXPORT_SYMBOL(system_bus_clock); | |
553 | ||
b887d2e6 | 554 | static int generic_ide_suspend(struct device *dev, pm_message_t mesg) |
1da177e4 LT |
555 | { |
556 | ide_drive_t *drive = dev->driver_data; | |
e3a59b4d | 557 | ide_hwif_t *hwif = HWIF(drive); |
1da177e4 LT |
558 | struct request rq; |
559 | struct request_pm_state rqpm; | |
560 | ide_task_t args; | |
5e32132b | 561 | int ret; |
1da177e4 | 562 | |
e3a59b4d HR |
563 | /* Call ACPI _GTM only once */ |
564 | if (!(drive->dn % 2)) | |
565 | ide_acpi_get_timing(hwif); | |
566 | ||
e7b241a7 | 567 | blk_rq_init(NULL, &rq); |
1da177e4 LT |
568 | memset(&rqpm, 0, sizeof(rqpm)); |
569 | memset(&args, 0, sizeof(args)); | |
4aff5e23 | 570 | rq.cmd_type = REQ_TYPE_PM_SUSPEND; |
1da177e4 | 571 | rq.special = &args; |
c00895ab | 572 | rq.data = &rqpm; |
1da177e4 | 573 | rqpm.pm_step = ide_pm_state_start_suspend; |
b887d2e6 DB |
574 | if (mesg.event == PM_EVENT_PRETHAW) |
575 | mesg.event = PM_EVENT_FREEZE; | |
576 | rqpm.pm_state = mesg.event; | |
1da177e4 | 577 | |
5e32132b SL |
578 | 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; | |
1da177e4 LT |
586 | } |
587 | ||
588 | static int generic_ide_resume(struct device *dev) | |
589 | { | |
590 | ide_drive_t *drive = dev->driver_data; | |
e3a59b4d | 591 | ide_hwif_t *hwif = HWIF(drive); |
1da177e4 LT |
592 | struct request rq; |
593 | struct request_pm_state rqpm; | |
594 | ide_task_t args; | |
0d2157f7 | 595 | int err; |
1da177e4 | 596 | |
e3a59b4d | 597 | /* Call ACPI _STM only once */ |
5e32132b SL |
598 | if (!(drive->dn % 2)) { |
599 | ide_acpi_set_state(hwif, 1); | |
e3a59b4d | 600 | ide_acpi_push_timing(hwif); |
5e32132b | 601 | } |
e3a59b4d HR |
602 | |
603 | ide_acpi_exec_tfs(drive); | |
604 | ||
e7b241a7 | 605 | blk_rq_init(NULL, &rq); |
1da177e4 LT |
606 | memset(&rqpm, 0, sizeof(rqpm)); |
607 | memset(&args, 0, sizeof(args)); | |
4aff5e23 | 608 | rq.cmd_type = REQ_TYPE_PM_RESUME; |
1da177e4 | 609 | rq.special = &args; |
c00895ab | 610 | rq.data = &rqpm; |
1da177e4 | 611 | rqpm.pm_step = ide_pm_state_start_resume; |
ca078bae | 612 | rqpm.pm_state = PM_EVENT_ON; |
1da177e4 | 613 | |
0d2157f7 LT |
614 | err = ide_do_drive_cmd(drive, &rq, ide_head_wait); |
615 | ||
ce9b2b0a RW |
616 | 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 | } | |
0d2157f7 LT |
622 | |
623 | return err; | |
1da177e4 LT |
624 | } |
625 | ||
626 | int generic_ide_ioctl(ide_drive_t *drive, struct file *file, struct block_device *bdev, | |
627 | unsigned int cmd, unsigned long arg) | |
628 | { | |
1497943e | 629 | unsigned long flags; |
1da177e4 | 630 | ide_driver_t *drv; |
1da177e4 | 631 | void __user *p = (void __user *)arg; |
1985026d | 632 | int err = 0, (*setfunc)(ide_drive_t *, int); |
1497943e | 633 | u8 *val; |
1da177e4 | 634 | |
1497943e BZ |
635 | 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; | |
1da177e4 | 645 | } |
1da177e4 LT |
646 | |
647 | switch (cmd) { | |
1da177e4 LT |
648 | 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 | | |
92b83c8f | 661 | drive->nice1 << IDE_NICE_1, |
1da177e4 | 662 | (long __user *) arg); |
1da177e4 LT |
663 | #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); | |
1da177e4 LT |
684 | 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: | |
dbecebca BZ |
697 | if (!capable(CAP_SYS_ADMIN)) |
698 | return -EACCES; | |
699 | ||
1da177e4 LT |
700 | /* |
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 | ||
913759ac AC |
710 | if (HWGROUP(drive)->resetting) { |
711 | spin_unlock_irqrestore(&ide_lock, flags); | |
712 | return -EBUSY; | |
713 | } | |
714 | ||
1da177e4 LT |
715 | ide_abort(drive, "drive reset"); |
716 | ||
125e1874 | 717 | BUG_ON(HWGROUP(drive)->handler); |
dbecebca | 718 | |
1da177e4 LT |
719 | /* Ensure nothing gets queued after we |
720 | drop the lock. Reset will clear the busy */ | |
dbecebca | 721 | |
1da177e4 LT |
722 | HWGROUP(drive)->busy = 1; |
723 | spin_unlock_irqrestore(&ide_lock, flags); | |
724 | (void) ide_do_reset(drive); | |
725 | ||
726 | return 0; | |
1da177e4 LT |
727 | 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; | |
1da177e4 LT |
737 | return -EOPNOTSUPP; |
738 | default: | |
739 | return -EINVAL; | |
740 | } | |
1497943e BZ |
741 | |
742 | read_val: | |
f9383c42 | 743 | mutex_lock(&ide_setting_mtx); |
1497943e BZ |
744 | spin_lock_irqsave(&ide_lock, flags); |
745 | err = *val; | |
746 | spin_unlock_irqrestore(&ide_lock, flags); | |
f9383c42 | 747 | mutex_unlock(&ide_setting_mtx); |
1497943e BZ |
748 | return err >= 0 ? put_user(err, (long __user *)arg) : err; |
749 | ||
750 | set_val: | |
751 | if (bdev != bdev->bd_contains) | |
752 | err = -EINVAL; | |
753 | else { | |
754 | if (!capable(CAP_SYS_ADMIN)) | |
755 | err = -EACCES; | |
756 | else { | |
f9383c42 | 757 | mutex_lock(&ide_setting_mtx); |
1497943e | 758 | err = setfunc(drive, arg); |
f9383c42 | 759 | mutex_unlock(&ide_setting_mtx); |
1497943e BZ |
760 | } |
761 | } | |
762 | return err; | |
1da177e4 LT |
763 | } |
764 | ||
765 | EXPORT_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 | */ | |
771 | static 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 | */ | |
789 | static 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 | ||
1da177e4 LT |
831 | /* |
832 | * ide_setup() gets called VERY EARLY during initialization, | |
833 | * to handle kernel "command line" strings beginning with "hdx=" or "ide". | |
834 | * | |
1c10e938 | 835 | * Remember to update Documentation/ide/ide.txt if you change something here. |
1da177e4 LT |
836 | */ |
837 | static int __init ide_setup(char *s) | |
838 | { | |
1da177e4 LT |
839 | ide_hwif_t *hwif; |
840 | ide_drive_t *drive; | |
841 | unsigned int hw, unit; | |
ef87f8d0 | 842 | int vals[3]; |
1da177e4 | 843 | const char max_drive = 'a' + ((MAX_HWIFS * MAX_DRIVES) - 1); |
1da177e4 | 844 | |
1da177e4 LT |
845 | 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; | |
9dcba7f2 | 860 | goto obsolete_option; |
1da177e4 LT |
861 | } |
862 | #endif /* CONFIG_BLK_DEV_IDEDOUBLER */ | |
863 | ||
864 | if (!strcmp(s, "ide=nodma")) { | |
865 | printk(" : Prevented DMA\n"); | |
866 | noautodma = 1; | |
c223701c | 867 | goto obsolete_option; |
1da177e4 LT |
868 | } |
869 | ||
e3a59b4d HR |
870 | #ifdef CONFIG_BLK_DEV_IDEACPI |
871 | if (!strcmp(s, "ide=noacpi")) { | |
872 | //printk(" : Disable IDE ACPI support.\n"); | |
873 | ide_noacpi = 1; | |
1dbfeb4b | 874 | goto obsolete_option; |
e3a59b4d HR |
875 | } |
876 | if (!strcmp(s, "ide=acpigtf")) { | |
877 | //printk(" : Enable IDE ACPI _GTF support.\n"); | |
1dbfeb4b BZ |
878 | ide_acpigtf = 1; |
879 | goto obsolete_option; | |
e3a59b4d HR |
880 | } |
881 | if (!strcmp(s, "ide=acpionboot")) { | |
882 | //printk(" : Call IDE ACPI methods on boot.\n"); | |
1dbfeb4b BZ |
883 | ide_acpionboot = 1; |
884 | goto obsolete_option; | |
e3a59b4d HR |
885 | } |
886 | #endif /* CONFIG_BLK_DEV_IDEACPI */ | |
887 | ||
1da177e4 LT |
888 | /* |
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[] = { | |
c223701c | 893 | "none", "noprobe", "nowerr", "cdrom", "nodma", |
207daeaa | 894 | "-6", "-7", "-8", "-9", "-10", |
36193484 | 895 | "noflush", "remap", "remap63", "scsi", NULL }; |
1da177e4 LT |
896 | 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)); | |
15220d9b | 903 | goto obsolete_option; |
1da177e4 LT |
904 | } |
905 | switch (match_parm(&s[3], hd_words, vals, 3)) { | |
906 | case -1: /* "none" */ | |
907 | case -2: /* "noprobe" */ | |
908 | drive->noprobe = 1; | |
6e87543a | 909 | goto obsolete_option; |
1da177e4 LT |
910 | case -3: /* "nowerr" */ |
911 | drive->bad_wstat = BAD_R_STAT; | |
6e87543a | 912 | goto obsolete_option; |
1da177e4 LT |
913 | case -4: /* "cdrom" */ |
914 | drive->present = 1; | |
915 | drive->media = ide_cdrom; | |
916 | /* an ATAPI device ignores DRDY */ | |
917 | drive->ready_stat = 0; | |
4706a7e0 | 918 | goto obsolete_option; |
c223701c BZ |
919 | case -5: /* nodma */ |
920 | drive->nodma = 1; | |
6e87543a | 921 | goto obsolete_option; |
36193484 JA |
922 | case -11: /* noflush */ |
923 | drive->noflush = 1; | |
6e87543a | 924 | goto obsolete_option; |
1da177e4 LT |
925 | case -12: /* "remap" */ |
926 | drive->remap_0_to_1 = 1; | |
d708c40d | 927 | goto obsolete_option; |
1da177e4 LT |
928 | case -13: /* "remap63" */ |
929 | drive->sect0 = 63; | |
d708c40d | 930 | goto obsolete_option; |
1da177e4 LT |
931 | case -14: /* "scsi" */ |
932 | drive->scsi = 1; | |
15220d9b | 933 | goto obsolete_option; |
1da177e4 LT |
934 | 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; | |
4706a7e0 | 942 | goto obsolete_option; |
1da177e4 LT |
943 | 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"); | |
73f1ad86 | 960 | goto obsolete_option; |
1da177e4 | 961 | } |
1da177e4 | 962 | |
1da177e4 LT |
963 | bad_option: |
964 | printk(" -- BAD OPTION\n"); | |
965 | return 1; | |
966 | obsolete_option: | |
967 | printk(" -- OBSOLETE OPTION, WILL BE REMOVED SOON!\n"); | |
968 | return 1; | |
1da177e4 LT |
969 | } |
970 | ||
1da177e4 LT |
971 | EXPORT_SYMBOL(ide_lock); |
972 | ||
8604affd BZ |
973 | static int ide_bus_match(struct device *dev, struct device_driver *drv) |
974 | { | |
975 | return 1; | |
976 | } | |
977 | ||
263756ec KS |
978 | static 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"; | |
a7a832de DK |
989 | case ide_optical: |
990 | return "optical"; | |
263756ec KS |
991 | default: |
992 | return "UNKNOWN"; | |
993 | } | |
994 | } | |
995 | ||
996 | static 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 | ||
1002 | static 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 | ||
1008 | static 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 | ||
e11b9035 BZ |
1014 | static 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 | ||
1021 | static 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 | ||
1028 | static 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 | ||
263756ec KS |
1035 | static struct device_attribute ide_dev_attrs[] = { |
1036 | __ATTR_RO(media), | |
1037 | __ATTR_RO(drivename), | |
1038 | __ATTR_RO(modalias), | |
e11b9035 BZ |
1039 | __ATTR_RO(model), |
1040 | __ATTR_RO(firmware), | |
1041 | __ATTR(serial, 0400, serial_show, NULL), | |
263756ec KS |
1042 | __ATTR_NULL |
1043 | }; | |
1044 | ||
7eff2e7a | 1045 | static int ide_uevent(struct device *dev, struct kobj_uevent_env *env) |
263756ec KS |
1046 | { |
1047 | ide_drive_t *drive = to_ide_device(dev); | |
7eff2e7a KS |
1048 | |
1049 | 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)); | |
263756ec KS |
1052 | return 0; |
1053 | } | |
1054 | ||
4031bbe4 RK |
1055 | static 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 | ||
1063 | static 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 | ||
1074 | static 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 | ||
1da177e4 LT |
1083 | struct bus_type ide_bus_type = { |
1084 | .name = "ide", | |
8604affd | 1085 | .match = ide_bus_match, |
263756ec | 1086 | .uevent = ide_uevent, |
4031bbe4 RK |
1087 | .probe = generic_ide_probe, |
1088 | .remove = generic_ide_remove, | |
1089 | .shutdown = generic_ide_shutdown, | |
263756ec | 1090 | .dev_attrs = ide_dev_attrs, |
1da177e4 LT |
1091 | .suspend = generic_ide_suspend, |
1092 | .resume = generic_ide_resume, | |
1093 | }; | |
1094 | ||
8604affd BZ |
1095 | EXPORT_SYMBOL_GPL(ide_bus_type); |
1096 | ||
ebae41a5 BZ |
1097 | int ide_vlb_clk; |
1098 | EXPORT_SYMBOL_GPL(ide_vlb_clk); | |
1099 | ||
1100 | module_param_named(vlb_clock, ide_vlb_clk, int, 0); | |
1101 | MODULE_PARM_DESC(vlb_clock, "VLB clock frequency (in MHz)"); | |
1102 | ||
1103 | int ide_pci_clk; | |
1104 | EXPORT_SYMBOL_GPL(ide_pci_clk); | |
1105 | ||
1106 | module_param_named(pci_clock, ide_pci_clk, int, 0); | |
1107 | MODULE_PARM_DESC(pci_clock, "PCI bus clock frequency (in MHz)"); | |
1108 | ||
6e87543a BZ |
1109 | static int ide_set_dev_param_mask(const char *s, struct kernel_param *kp) |
1110 | { | |
1111 | int a, b, i, j = 1; | |
1112 | unsigned int *dev_param_mask = (unsigned int *)kp->arg; | |
1113 | ||
1114 | if (sscanf(s, "%d.%d:%d", &a, &b, &j) != 3 && | |
1115 | sscanf(s, "%d.%d", &a, &b) != 2) | |
1116 | return -EINVAL; | |
1117 | ||
1118 | i = a * MAX_DRIVES + b; | |
1119 | ||
1120 | if (i >= MAX_HWIFS * MAX_DRIVES || j < 0 || j > 1) | |
1121 | return -EINVAL; | |
1122 | ||
1123 | if (j) | |
1124 | *dev_param_mask |= (1 << i); | |
1125 | else | |
1126 | *dev_param_mask &= (1 << i); | |
1127 | ||
1128 | return 0; | |
1129 | } | |
1130 | ||
1131 | static unsigned int ide_nodma; | |
1132 | ||
1133 | module_param_call(nodma, ide_set_dev_param_mask, NULL, &ide_nodma, 0); | |
1134 | MODULE_PARM_DESC(nodma, "disallow DMA for a device"); | |
1135 | ||
1136 | static unsigned int ide_noflush; | |
1137 | ||
1138 | module_param_call(noflush, ide_set_dev_param_mask, NULL, &ide_noflush, 0); | |
1139 | MODULE_PARM_DESC(noflush, "disable flush requests for a device"); | |
1140 | ||
1141 | static unsigned int ide_noprobe; | |
1142 | ||
1143 | module_param_call(noprobe, ide_set_dev_param_mask, NULL, &ide_noprobe, 0); | |
1144 | MODULE_PARM_DESC(noprobe, "skip probing for a device"); | |
1145 | ||
1146 | static unsigned int ide_nowerr; | |
1147 | ||
1148 | module_param_call(nowerr, ide_set_dev_param_mask, NULL, &ide_nowerr, 0); | |
1149 | MODULE_PARM_DESC(nowerr, "ignore the WRERR_STAT bit for a device"); | |
1150 | ||
4706a7e0 BZ |
1151 | static unsigned int ide_cdroms; |
1152 | ||
1153 | module_param_call(cdrom, ide_set_dev_param_mask, NULL, &ide_cdroms, 0); | |
1154 | MODULE_PARM_DESC(cdrom, "force device as a CD-ROM"); | |
1155 | ||
1156 | struct chs_geom { | |
1157 | unsigned int cyl; | |
1158 | u8 head; | |
1159 | u8 sect; | |
1160 | }; | |
1161 | ||
1162 | static unsigned int ide_disks; | |
1163 | static struct chs_geom ide_disks_chs[MAX_HWIFS * MAX_DRIVES]; | |
1164 | ||
1165 | static int ide_set_disk_chs(const char *str, struct kernel_param *kp) | |
1166 | { | |
1167 | int a, b, c = 0, h = 0, s = 0, i, j = 1; | |
1168 | ||
1169 | if (sscanf(str, "%d.%d:%d,%d,%d", &a, &b, &c, &h, &s) != 5 && | |
1170 | sscanf(str, "%d.%d:%d", &a, &b, &j) != 3) | |
1171 | return -EINVAL; | |
1172 | ||
1173 | i = a * MAX_DRIVES + b; | |
1174 | ||
1175 | if (i >= MAX_HWIFS * MAX_DRIVES || j < 0 || j > 1) | |
1176 | return -EINVAL; | |
1177 | ||
1178 | if (c > INT_MAX || h > 255 || s > 255) | |
1179 | return -EINVAL; | |
1180 | ||
1181 | if (j) | |
1182 | ide_disks |= (1 << i); | |
1183 | else | |
1184 | ide_disks &= (1 << i); | |
1185 | ||
1186 | ide_disks_chs[i].cyl = c; | |
1187 | ide_disks_chs[i].head = h; | |
1188 | ide_disks_chs[i].sect = s; | |
1189 | ||
1190 | return 0; | |
1191 | } | |
1192 | ||
1193 | module_param_call(chs, ide_set_disk_chs, NULL, NULL, 0); | |
1194 | MODULE_PARM_DESC(chs, "force device as a disk (using CHS)"); | |
1195 | ||
6e87543a BZ |
1196 | static void ide_dev_apply_params(ide_drive_t *drive) |
1197 | { | |
1198 | int i = drive->hwif->index * MAX_DRIVES + drive->select.b.unit; | |
1199 | ||
1200 | if (ide_nodma & (1 << i)) { | |
1201 | printk(KERN_INFO "ide: disallowing DMA for %s\n", drive->name); | |
1202 | drive->nodma = 1; | |
1203 | } | |
1204 | if (ide_noflush & (1 << i)) { | |
1205 | printk(KERN_INFO "ide: disabling flush requests for %s\n", | |
1206 | drive->name); | |
1207 | drive->noflush = 1; | |
1208 | } | |
1209 | if (ide_noprobe & (1 << i)) { | |
1210 | printk(KERN_INFO "ide: skipping probe for %s\n", drive->name); | |
1211 | drive->noprobe = 1; | |
1212 | } | |
1213 | if (ide_nowerr & (1 << i)) { | |
1214 | printk(KERN_INFO "ide: ignoring the WRERR_STAT bit for %s\n", | |
1215 | drive->name); | |
1216 | drive->bad_wstat = BAD_R_STAT; | |
1217 | } | |
4706a7e0 BZ |
1218 | if (ide_cdroms & (1 << i)) { |
1219 | printk(KERN_INFO "ide: forcing %s as a CD-ROM\n", drive->name); | |
1220 | drive->present = 1; | |
1221 | drive->media = ide_cdrom; | |
1222 | /* an ATAPI device ignores DRDY */ | |
1223 | drive->ready_stat = 0; | |
1224 | } | |
1225 | if (ide_disks & (1 << i)) { | |
1226 | drive->cyl = drive->bios_cyl = ide_disks_chs[i].cyl; | |
1227 | drive->head = drive->bios_head = ide_disks_chs[i].head; | |
1228 | drive->sect = drive->bios_sect = ide_disks_chs[i].sect; | |
1229 | drive->forced_geom = 1; | |
1230 | printk(KERN_INFO "ide: forcing %s as a disk (%d/%d/%d)\n", | |
1231 | drive->name, | |
1232 | drive->cyl, drive->head, drive->sect); | |
1233 | drive->present = 1; | |
1234 | drive->media = ide_disk; | |
1235 | drive->ready_stat = READY_STAT; | |
1236 | } | |
6e87543a BZ |
1237 | } |
1238 | ||
9fd91d95 BZ |
1239 | static unsigned int ide_ignore_cable; |
1240 | ||
1241 | static int ide_set_ignore_cable(const char *s, struct kernel_param *kp) | |
1242 | { | |
1243 | int i, j = 1; | |
1244 | ||
1245 | if (sscanf(s, "%d:%d", &i, &j) != 2 && sscanf(s, "%d", &i) != 1) | |
1246 | return -EINVAL; | |
1247 | ||
1248 | if (i >= MAX_HWIFS || j < 0 || j > 1) | |
1249 | return -EINVAL; | |
1250 | ||
1251 | if (j) | |
1252 | ide_ignore_cable |= (1 << i); | |
1253 | else | |
1254 | ide_ignore_cable &= (1 << i); | |
1255 | ||
1256 | return 0; | |
1257 | } | |
1258 | ||
1259 | module_param_call(ignore_cable, ide_set_ignore_cable, NULL, NULL, 0); | |
1260 | MODULE_PARM_DESC(ignore_cable, "ignore cable detection"); | |
1261 | ||
1262 | void ide_port_apply_params(ide_hwif_t *hwif) | |
1263 | { | |
6e87543a BZ |
1264 | int i; |
1265 | ||
9fd91d95 BZ |
1266 | if (ide_ignore_cable & (1 << hwif->index)) { |
1267 | printk(KERN_INFO "ide: ignoring cable detection for %s\n", | |
1268 | hwif->name); | |
1269 | hwif->cbl = ATA_CBL_PATA40_SHORT; | |
1270 | } | |
6e87543a BZ |
1271 | |
1272 | for (i = 0; i < MAX_DRIVES; i++) | |
1273 | ide_dev_apply_params(&hwif->drives[i]); | |
9fd91d95 BZ |
1274 | } |
1275 | ||
1da177e4 LT |
1276 | /* |
1277 | * This is gets invoked once during initialization, to set *everything* up | |
1278 | */ | |
1279 | static int __init ide_init(void) | |
1280 | { | |
349ae23f RD |
1281 | int ret; |
1282 | ||
eba8ff94 | 1283 | printk(KERN_INFO "Uniform Multi-Platform E-IDE driver\n"); |
1da177e4 LT |
1284 | system_bus_speed = ide_system_bus_speed(); |
1285 | ||
537f06c5 BZ |
1286 | printk(KERN_INFO "ide: Assuming %dMHz system bus speed " |
1287 | "for PIO modes%s\n", system_bus_speed, | |
1288 | idebus_parameter ? "" : "; override with idebus=xx"); | |
1289 | ||
349ae23f RD |
1290 | ret = bus_register(&ide_bus_type); |
1291 | if (ret < 0) { | |
1292 | printk(KERN_WARNING "IDE: bus_register error: %d\n", ret); | |
1293 | return ret; | |
1294 | } | |
1da177e4 | 1295 | |
f74c9141 BZ |
1296 | ide_port_class = class_create(THIS_MODULE, "ide_port"); |
1297 | if (IS_ERR(ide_port_class)) { | |
1298 | ret = PTR_ERR(ide_port_class); | |
1299 | goto out_port_class; | |
1300 | } | |
f74c9141 | 1301 | |
1da177e4 LT |
1302 | init_ide_data(); |
1303 | ||
5cbf79cd | 1304 | proc_ide_create(); |
1da177e4 | 1305 | |
1da177e4 | 1306 | return 0; |
f74c9141 BZ |
1307 | |
1308 | out_port_class: | |
1309 | bus_unregister(&ide_bus_type); | |
1310 | ||
1311 | return ret; | |
1da177e4 LT |
1312 | } |
1313 | ||
1314 | #ifdef MODULE | |
1315 | static char *options = NULL; | |
1316 | module_param(options, charp, 0); | |
1317 | MODULE_LICENSE("GPL"); | |
1318 | ||
1319 | static void __init parse_options (char *line) | |
1320 | { | |
1321 | char *next = line; | |
1322 | ||
1323 | if (line == NULL || !*line) | |
1324 | return; | |
1325 | while ((line = next) != NULL) { | |
1326 | if ((next = strchr(line,' ')) != NULL) | |
1327 | *next++ = 0; | |
1328 | if (!ide_setup(line)) | |
1329 | printk (KERN_INFO "Unknown option '%s'\n", line); | |
1330 | } | |
1331 | } | |
1332 | ||
fbd8ad30 | 1333 | int __init init_module (void) |
1da177e4 LT |
1334 | { |
1335 | parse_options(options); | |
1336 | return ide_init(); | |
1337 | } | |
1338 | ||
eb797227 | 1339 | void __exit cleanup_module (void) |
1da177e4 | 1340 | { |
1da177e4 | 1341 | proc_ide_destroy(); |
1da177e4 | 1342 | |
f74c9141 BZ |
1343 | class_destroy(ide_port_class); |
1344 | ||
1da177e4 LT |
1345 | bus_unregister(&ide_bus_type); |
1346 | } | |
1347 | ||
1348 | #else /* !MODULE */ | |
1349 | ||
1350 | __setup("", ide_setup); | |
1351 | ||
1352 | module_init(ide_init); | |
1353 | ||
1354 | #endif /* MODULE */ |