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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; | |
7f612f27 | 117 | drive->select = (unit << 4) | ATA_DEVICE_OBS; |
1da177e4 | 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 | ||
97100fc8 | 141 | if (drive->dev_flags & IDE_DFLAG_PRESENT) { |
71bf9f6f BZ |
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 | |
8185d5aa BZ |
253 | ide_devset_get(io_32bit, io_32bit); |
254 | ||
92f1f8fd | 255 | static int set_io_32bit(ide_drive_t *drive, int arg) |
1da177e4 | 256 | { |
97100fc8 | 257 | if (drive->dev_flags & IDE_DFLAG_NO_IO_32BIT) |
1497943e BZ |
258 | return -EPERM; |
259 | ||
260 | if (arg < 0 || arg > 1 + (SUPPORT_VLB_SYNC << 1)) | |
261 | return -EINVAL; | |
262 | ||
1da177e4 | 263 | drive->io_32bit = arg; |
644a9d76 | 264 | |
1da177e4 LT |
265 | return 0; |
266 | } | |
267 | ||
97100fc8 | 268 | ide_devset_get_flag(ksettings, IDE_DFLAG_KEEP_SETTINGS); |
8185d5aa | 269 | |
92f1f8fd | 270 | static int set_ksettings(ide_drive_t *drive, int arg) |
1497943e BZ |
271 | { |
272 | if (arg < 0 || arg > 1) | |
273 | return -EINVAL; | |
274 | ||
97100fc8 BZ |
275 | if (arg) |
276 | drive->dev_flags |= IDE_DFLAG_KEEP_SETTINGS; | |
277 | else | |
278 | drive->dev_flags &= ~IDE_DFLAG_KEEP_SETTINGS; | |
1497943e BZ |
279 | |
280 | return 0; | |
281 | } | |
282 | ||
97100fc8 | 283 | ide_devset_get_flag(using_dma, IDE_DFLAG_USING_DMA); |
8185d5aa | 284 | |
92f1f8fd | 285 | static int set_using_dma(ide_drive_t *drive, int arg) |
1da177e4 LT |
286 | { |
287 | #ifdef CONFIG_BLK_DEV_IDEDMA | |
87996204 BZ |
288 | int err = -EPERM; |
289 | ||
1497943e BZ |
290 | if (arg < 0 || arg > 1) |
291 | return -EINVAL; | |
292 | ||
48fb2688 | 293 | if (ata_id_has_dma(drive->id) == 0) |
87996204 BZ |
294 | goto out; |
295 | ||
92f1f8fd | 296 | if (drive->hwif->dma_ops == NULL) |
87996204 BZ |
297 | goto out; |
298 | ||
87996204 BZ |
299 | err = 0; |
300 | ||
1da177e4 | 301 | if (arg) { |
23b1bd45 | 302 | if (ide_set_dma(drive)) |
87996204 | 303 | err = -EIO; |
7469aaf6 BZ |
304 | } else |
305 | ide_dma_off(drive); | |
87996204 | 306 | |
87996204 BZ |
307 | out: |
308 | return err; | |
1da177e4 | 309 | #else |
1497943e BZ |
310 | if (arg < 0 || arg > 1) |
311 | return -EINVAL; | |
312 | ||
1da177e4 LT |
313 | return -EPERM; |
314 | #endif | |
315 | } | |
316 | ||
6982daf7 BZ |
317 | /* |
318 | * handle HDIO_SET_PIO_MODE ioctl abusers here, eventually it will go away | |
319 | */ | |
320 | static int set_pio_mode_abuse(ide_hwif_t *hwif, u8 req_pio) | |
321 | { | |
322 | switch (req_pio) { | |
323 | case 202: | |
324 | case 201: | |
325 | case 200: | |
326 | case 102: | |
327 | case 101: | |
328 | case 100: | |
329 | return (hwif->host_flags & IDE_HFLAG_ABUSE_DMA_MODES) ? 1 : 0; | |
330 | case 9: | |
331 | case 8: | |
332 | return (hwif->host_flags & IDE_HFLAG_ABUSE_PREFETCH) ? 1 : 0; | |
333 | case 7: | |
334 | case 6: | |
335 | return (hwif->host_flags & IDE_HFLAG_ABUSE_FAST_DEVSEL) ? 1 : 0; | |
336 | default: | |
337 | return 0; | |
338 | } | |
339 | } | |
340 | ||
92f1f8fd | 341 | static int set_pio_mode(ide_drive_t *drive, int arg) |
1da177e4 | 342 | { |
784506cb | 343 | ide_hwif_t *hwif = drive->hwif; |
ac95beed | 344 | const struct ide_port_ops *port_ops = hwif->port_ops; |
1da177e4 | 345 | |
1497943e BZ |
346 | if (arg < 0 || arg > 255) |
347 | return -EINVAL; | |
348 | ||
ac95beed | 349 | if (port_ops == NULL || port_ops->set_pio_mode == NULL || |
784506cb | 350 | (hwif->host_flags & IDE_HFLAG_NO_SET_MODE)) |
1da177e4 | 351 | return -ENOSYS; |
26bcb879 | 352 | |
6982daf7 BZ |
353 | if (set_pio_mode_abuse(drive->hwif, arg)) { |
354 | if (arg == 8 || arg == 9) { | |
355 | unsigned long flags; | |
145b75e9 | 356 | |
6982daf7 BZ |
357 | /* take lock for IDE_DFLAG_[NO_]UNMASK/[NO_]IO_32BIT */ |
358 | spin_lock_irqsave(&ide_lock, flags); | |
359 | port_ops->set_pio_mode(drive, arg); | |
360 | spin_unlock_irqrestore(&ide_lock, flags); | |
361 | } else | |
362 | port_ops->set_pio_mode(drive, arg); | |
363 | } else { | |
364 | int keep_dma = !!(drive->dev_flags & IDE_DFLAG_USING_DMA); | |
145b75e9 | 365 | |
6982daf7 | 366 | ide_set_pio(drive, arg); |
5b114715 | 367 | |
6982daf7 BZ |
368 | if (hwif->host_flags & IDE_HFLAG_SET_PIO_MODE_KEEP_DMA) { |
369 | if (keep_dma) | |
370 | ide_dma_on(drive); | |
371 | } | |
372 | } | |
5b114715 | 373 | |
1da177e4 LT |
374 | return 0; |
375 | } | |
376 | ||
97100fc8 | 377 | ide_devset_get_flag(unmaskirq, IDE_DFLAG_UNMASK); |
8185d5aa | 378 | |
92f1f8fd | 379 | static int set_unmaskirq(ide_drive_t *drive, int arg) |
1497943e | 380 | { |
97100fc8 | 381 | if (drive->dev_flags & IDE_DFLAG_NO_UNMASK) |
1497943e BZ |
382 | return -EPERM; |
383 | ||
384 | if (arg < 0 || arg > 1) | |
385 | return -EINVAL; | |
386 | ||
97100fc8 BZ |
387 | if (arg) |
388 | drive->dev_flags |= IDE_DFLAG_UNMASK; | |
389 | else | |
390 | drive->dev_flags &= ~IDE_DFLAG_UNMASK; | |
1497943e BZ |
391 | |
392 | return 0; | |
393 | } | |
394 | ||
92f1f8fd EO |
395 | #define ide_gen_devset_rw(_name, _func) \ |
396 | __IDE_DEVSET(_name, DS_SYNC, get_##_func, set_##_func) | |
397 | ||
398 | ide_gen_devset_rw(io_32bit, io_32bit); | |
399 | ide_gen_devset_rw(keepsettings, ksettings); | |
400 | ide_gen_devset_rw(unmaskirq, unmaskirq); | |
401 | ide_gen_devset_rw(using_dma, using_dma); | |
6982daf7 | 402 | __IDE_DEVSET(pio_mode, DS_SYNC, NULL, set_pio_mode); |
92f1f8fd | 403 | |
b887d2e6 | 404 | static int generic_ide_suspend(struct device *dev, pm_message_t mesg) |
1da177e4 | 405 | { |
1ea1031c | 406 | ide_drive_t *drive = dev->driver_data, *pair = ide_get_pair_dev(drive); |
e3a59b4d | 407 | ide_hwif_t *hwif = HWIF(drive); |
5b114715 | 408 | struct request *rq; |
1da177e4 LT |
409 | struct request_pm_state rqpm; |
410 | ide_task_t args; | |
5e32132b | 411 | int ret; |
1da177e4 | 412 | |
1ea1031c BZ |
413 | /* call ACPI _GTM only once */ |
414 | if ((drive->dn & 1) == 0 || pair == NULL) | |
e3a59b4d HR |
415 | ide_acpi_get_timing(hwif); |
416 | ||
1da177e4 LT |
417 | memset(&rqpm, 0, sizeof(rqpm)); |
418 | memset(&args, 0, sizeof(args)); | |
5b114715 FT |
419 | rq = blk_get_request(drive->queue, READ, __GFP_WAIT); |
420 | rq->cmd_type = REQ_TYPE_PM_SUSPEND; | |
421 | rq->special = &args; | |
422 | rq->data = &rqpm; | |
0d346ba0 | 423 | rqpm.pm_step = IDE_PM_START_SUSPEND; |
b887d2e6 DB |
424 | if (mesg.event == PM_EVENT_PRETHAW) |
425 | mesg.event = PM_EVENT_FREEZE; | |
426 | rqpm.pm_state = mesg.event; | |
1da177e4 | 427 | |
5b114715 FT |
428 | ret = blk_execute_rq(drive->queue, NULL, rq, 0); |
429 | blk_put_request(rq); | |
1ea1031c BZ |
430 | |
431 | /* call ACPI _PS3 only after both devices are suspended */ | |
432 | if (ret == 0 && ((drive->dn & 1) || pair == NULL)) | |
5e32132b | 433 | ide_acpi_set_state(hwif, 0); |
1ea1031c | 434 | |
5e32132b | 435 | return ret; |
1da177e4 LT |
436 | } |
437 | ||
438 | static int generic_ide_resume(struct device *dev) | |
439 | { | |
1ea1031c | 440 | ide_drive_t *drive = dev->driver_data, *pair = ide_get_pair_dev(drive); |
e3a59b4d | 441 | ide_hwif_t *hwif = HWIF(drive); |
5b114715 | 442 | struct request *rq; |
1da177e4 LT |
443 | struct request_pm_state rqpm; |
444 | ide_task_t args; | |
0d2157f7 | 445 | int err; |
1da177e4 | 446 | |
1ea1031c BZ |
447 | /* call ACPI _PS0 / _STM only once */ |
448 | if ((drive->dn & 1) == 0 || pair == NULL) { | |
5e32132b | 449 | ide_acpi_set_state(hwif, 1); |
e3a59b4d | 450 | ide_acpi_push_timing(hwif); |
5e32132b | 451 | } |
e3a59b4d HR |
452 | |
453 | ide_acpi_exec_tfs(drive); | |
454 | ||
1da177e4 LT |
455 | memset(&rqpm, 0, sizeof(rqpm)); |
456 | memset(&args, 0, sizeof(args)); | |
5b114715 FT |
457 | rq = blk_get_request(drive->queue, READ, __GFP_WAIT); |
458 | rq->cmd_type = REQ_TYPE_PM_RESUME; | |
459 | rq->cmd_flags |= REQ_PREEMPT; | |
460 | rq->special = &args; | |
461 | rq->data = &rqpm; | |
0d346ba0 | 462 | rqpm.pm_step = IDE_PM_START_RESUME; |
ca078bae | 463 | rqpm.pm_state = PM_EVENT_ON; |
1da177e4 | 464 | |
5b114715 FT |
465 | err = blk_execute_rq(drive->queue, NULL, rq, 1); |
466 | blk_put_request(rq); | |
0d2157f7 | 467 | |
ce9b2b0a RW |
468 | if (err == 0 && dev->driver) { |
469 | ide_driver_t *drv = to_ide_driver(dev->driver); | |
470 | ||
471 | if (drv->resume) | |
472 | drv->resume(drive); | |
473 | } | |
0d2157f7 LT |
474 | |
475 | return err; | |
1da177e4 LT |
476 | } |
477 | ||
08da591e BZ |
478 | /** |
479 | * ide_device_get - get an additional reference to a ide_drive_t | |
480 | * @drive: device to get a reference to | |
481 | * | |
482 | * Gets a reference to the ide_drive_t and increments the use count of the | |
483 | * underlying LLDD module. | |
484 | */ | |
485 | int ide_device_get(ide_drive_t *drive) | |
486 | { | |
487 | struct device *host_dev; | |
488 | struct module *module; | |
489 | ||
490 | if (!get_device(&drive->gendev)) | |
491 | return -ENXIO; | |
492 | ||
493 | host_dev = drive->hwif->host->dev[0]; | |
494 | module = host_dev ? host_dev->driver->owner : NULL; | |
495 | ||
496 | if (module && !try_module_get(module)) { | |
497 | put_device(&drive->gendev); | |
498 | return -ENXIO; | |
499 | } | |
500 | ||
501 | return 0; | |
502 | } | |
503 | EXPORT_SYMBOL_GPL(ide_device_get); | |
504 | ||
505 | /** | |
506 | * ide_device_put - release a reference to a ide_drive_t | |
507 | * @drive: device to release a reference on | |
508 | * | |
509 | * Release a reference to the ide_drive_t and decrements the use count of | |
510 | * the underlying LLDD module. | |
511 | */ | |
512 | void ide_device_put(ide_drive_t *drive) | |
513 | { | |
514 | #ifdef CONFIG_MODULE_UNLOAD | |
515 | struct device *host_dev = drive->hwif->host->dev[0]; | |
516 | struct module *module = host_dev ? host_dev->driver->owner : NULL; | |
517 | ||
518 | if (module) | |
519 | module_put(module); | |
520 | #endif | |
521 | put_device(&drive->gendev); | |
522 | } | |
523 | EXPORT_SYMBOL_GPL(ide_device_put); | |
524 | ||
8604affd BZ |
525 | static int ide_bus_match(struct device *dev, struct device_driver *drv) |
526 | { | |
527 | return 1; | |
528 | } | |
529 | ||
263756ec KS |
530 | static char *media_string(ide_drive_t *drive) |
531 | { | |
532 | switch (drive->media) { | |
533 | case ide_disk: | |
534 | return "disk"; | |
535 | case ide_cdrom: | |
536 | return "cdrom"; | |
537 | case ide_tape: | |
538 | return "tape"; | |
539 | case ide_floppy: | |
540 | return "floppy"; | |
a7a832de DK |
541 | case ide_optical: |
542 | return "optical"; | |
263756ec KS |
543 | default: |
544 | return "UNKNOWN"; | |
545 | } | |
546 | } | |
547 | ||
548 | static ssize_t media_show(struct device *dev, struct device_attribute *attr, char *buf) | |
549 | { | |
550 | ide_drive_t *drive = to_ide_device(dev); | |
551 | return sprintf(buf, "%s\n", media_string(drive)); | |
552 | } | |
553 | ||
554 | static ssize_t drivename_show(struct device *dev, struct device_attribute *attr, char *buf) | |
555 | { | |
556 | ide_drive_t *drive = to_ide_device(dev); | |
557 | return sprintf(buf, "%s\n", drive->name); | |
558 | } | |
559 | ||
560 | static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf) | |
561 | { | |
562 | ide_drive_t *drive = to_ide_device(dev); | |
563 | return sprintf(buf, "ide:m-%s\n", media_string(drive)); | |
564 | } | |
565 | ||
e11b9035 BZ |
566 | static ssize_t model_show(struct device *dev, struct device_attribute *attr, |
567 | char *buf) | |
568 | { | |
569 | ide_drive_t *drive = to_ide_device(dev); | |
4dde4492 | 570 | return sprintf(buf, "%s\n", (char *)&drive->id[ATA_ID_PROD]); |
e11b9035 BZ |
571 | } |
572 | ||
573 | static ssize_t firmware_show(struct device *dev, struct device_attribute *attr, | |
574 | char *buf) | |
575 | { | |
576 | ide_drive_t *drive = to_ide_device(dev); | |
4dde4492 | 577 | return sprintf(buf, "%s\n", (char *)&drive->id[ATA_ID_FW_REV]); |
e11b9035 BZ |
578 | } |
579 | ||
580 | static ssize_t serial_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_SERNO]); |
e11b9035 BZ |
585 | } |
586 | ||
263756ec KS |
587 | static struct device_attribute ide_dev_attrs[] = { |
588 | __ATTR_RO(media), | |
589 | __ATTR_RO(drivename), | |
590 | __ATTR_RO(modalias), | |
e11b9035 BZ |
591 | __ATTR_RO(model), |
592 | __ATTR_RO(firmware), | |
593 | __ATTR(serial, 0400, serial_show, NULL), | |
263756ec KS |
594 | __ATTR_NULL |
595 | }; | |
596 | ||
7eff2e7a | 597 | static int ide_uevent(struct device *dev, struct kobj_uevent_env *env) |
263756ec KS |
598 | { |
599 | ide_drive_t *drive = to_ide_device(dev); | |
7eff2e7a KS |
600 | |
601 | add_uevent_var(env, "MEDIA=%s", media_string(drive)); | |
602 | add_uevent_var(env, "DRIVENAME=%s", drive->name); | |
603 | add_uevent_var(env, "MODALIAS=ide:m-%s", media_string(drive)); | |
263756ec KS |
604 | return 0; |
605 | } | |
606 | ||
4031bbe4 RK |
607 | static int generic_ide_probe(struct device *dev) |
608 | { | |
609 | ide_drive_t *drive = to_ide_device(dev); | |
610 | ide_driver_t *drv = to_ide_driver(dev->driver); | |
611 | ||
612 | return drv->probe ? drv->probe(drive) : -ENODEV; | |
613 | } | |
614 | ||
615 | static int generic_ide_remove(struct device *dev) | |
616 | { | |
617 | ide_drive_t *drive = to_ide_device(dev); | |
618 | ide_driver_t *drv = to_ide_driver(dev->driver); | |
619 | ||
620 | if (drv->remove) | |
621 | drv->remove(drive); | |
622 | ||
623 | return 0; | |
624 | } | |
625 | ||
626 | static void generic_ide_shutdown(struct device *dev) | |
627 | { | |
628 | ide_drive_t *drive = to_ide_device(dev); | |
629 | ide_driver_t *drv = to_ide_driver(dev->driver); | |
630 | ||
631 | if (dev->driver && drv->shutdown) | |
632 | drv->shutdown(drive); | |
633 | } | |
634 | ||
1da177e4 LT |
635 | struct bus_type ide_bus_type = { |
636 | .name = "ide", | |
8604affd | 637 | .match = ide_bus_match, |
263756ec | 638 | .uevent = ide_uevent, |
4031bbe4 RK |
639 | .probe = generic_ide_probe, |
640 | .remove = generic_ide_remove, | |
641 | .shutdown = generic_ide_shutdown, | |
263756ec | 642 | .dev_attrs = ide_dev_attrs, |
1da177e4 LT |
643 | .suspend = generic_ide_suspend, |
644 | .resume = generic_ide_resume, | |
645 | }; | |
646 | ||
8604affd BZ |
647 | EXPORT_SYMBOL_GPL(ide_bus_type); |
648 | ||
ebae41a5 BZ |
649 | int ide_vlb_clk; |
650 | EXPORT_SYMBOL_GPL(ide_vlb_clk); | |
651 | ||
652 | module_param_named(vlb_clock, ide_vlb_clk, int, 0); | |
653 | MODULE_PARM_DESC(vlb_clock, "VLB clock frequency (in MHz)"); | |
654 | ||
655 | int ide_pci_clk; | |
656 | EXPORT_SYMBOL_GPL(ide_pci_clk); | |
657 | ||
658 | module_param_named(pci_clock, ide_pci_clk, int, 0); | |
659 | MODULE_PARM_DESC(pci_clock, "PCI bus clock frequency (in MHz)"); | |
660 | ||
6e87543a BZ |
661 | static int ide_set_dev_param_mask(const char *s, struct kernel_param *kp) |
662 | { | |
663 | int a, b, i, j = 1; | |
664 | unsigned int *dev_param_mask = (unsigned int *)kp->arg; | |
665 | ||
666 | if (sscanf(s, "%d.%d:%d", &a, &b, &j) != 3 && | |
667 | sscanf(s, "%d.%d", &a, &b) != 2) | |
668 | return -EINVAL; | |
669 | ||
670 | i = a * MAX_DRIVES + b; | |
671 | ||
672 | if (i >= MAX_HWIFS * MAX_DRIVES || j < 0 || j > 1) | |
673 | return -EINVAL; | |
674 | ||
675 | if (j) | |
676 | *dev_param_mask |= (1 << i); | |
677 | else | |
678 | *dev_param_mask &= (1 << i); | |
679 | ||
680 | return 0; | |
681 | } | |
682 | ||
683 | static unsigned int ide_nodma; | |
684 | ||
685 | module_param_call(nodma, ide_set_dev_param_mask, NULL, &ide_nodma, 0); | |
686 | MODULE_PARM_DESC(nodma, "disallow DMA for a device"); | |
687 | ||
688 | static unsigned int ide_noflush; | |
689 | ||
690 | module_param_call(noflush, ide_set_dev_param_mask, NULL, &ide_noflush, 0); | |
691 | MODULE_PARM_DESC(noflush, "disable flush requests for a device"); | |
692 | ||
693 | static unsigned int ide_noprobe; | |
694 | ||
695 | module_param_call(noprobe, ide_set_dev_param_mask, NULL, &ide_noprobe, 0); | |
696 | MODULE_PARM_DESC(noprobe, "skip probing for a device"); | |
697 | ||
698 | static unsigned int ide_nowerr; | |
699 | ||
700 | module_param_call(nowerr, ide_set_dev_param_mask, NULL, &ide_nowerr, 0); | |
3a7d2484 | 701 | MODULE_PARM_DESC(nowerr, "ignore the ATA_DF bit for a device"); |
6e87543a | 702 | |
4706a7e0 BZ |
703 | static unsigned int ide_cdroms; |
704 | ||
705 | module_param_call(cdrom, ide_set_dev_param_mask, NULL, &ide_cdroms, 0); | |
706 | MODULE_PARM_DESC(cdrom, "force device as a CD-ROM"); | |
707 | ||
708 | struct chs_geom { | |
709 | unsigned int cyl; | |
710 | u8 head; | |
711 | u8 sect; | |
712 | }; | |
713 | ||
714 | static unsigned int ide_disks; | |
715 | static struct chs_geom ide_disks_chs[MAX_HWIFS * MAX_DRIVES]; | |
716 | ||
717 | static int ide_set_disk_chs(const char *str, struct kernel_param *kp) | |
718 | { | |
719 | int a, b, c = 0, h = 0, s = 0, i, j = 1; | |
720 | ||
721 | if (sscanf(str, "%d.%d:%d,%d,%d", &a, &b, &c, &h, &s) != 5 && | |
722 | sscanf(str, "%d.%d:%d", &a, &b, &j) != 3) | |
723 | return -EINVAL; | |
724 | ||
725 | i = a * MAX_DRIVES + b; | |
726 | ||
727 | if (i >= MAX_HWIFS * MAX_DRIVES || j < 0 || j > 1) | |
728 | return -EINVAL; | |
729 | ||
730 | if (c > INT_MAX || h > 255 || s > 255) | |
731 | return -EINVAL; | |
732 | ||
733 | if (j) | |
734 | ide_disks |= (1 << i); | |
735 | else | |
736 | ide_disks &= (1 << i); | |
737 | ||
738 | ide_disks_chs[i].cyl = c; | |
739 | ide_disks_chs[i].head = h; | |
740 | ide_disks_chs[i].sect = s; | |
741 | ||
742 | return 0; | |
743 | } | |
744 | ||
745 | module_param_call(chs, ide_set_disk_chs, NULL, NULL, 0); | |
746 | MODULE_PARM_DESC(chs, "force device as a disk (using CHS)"); | |
747 | ||
123995b9 | 748 | static void ide_dev_apply_params(ide_drive_t *drive, u8 unit) |
6e87543a | 749 | { |
123995b9 | 750 | int i = drive->hwif->index * MAX_DRIVES + unit; |
6e87543a BZ |
751 | |
752 | if (ide_nodma & (1 << i)) { | |
753 | printk(KERN_INFO "ide: disallowing DMA for %s\n", drive->name); | |
97100fc8 | 754 | drive->dev_flags |= IDE_DFLAG_NODMA; |
6e87543a BZ |
755 | } |
756 | if (ide_noflush & (1 << i)) { | |
757 | printk(KERN_INFO "ide: disabling flush requests for %s\n", | |
758 | drive->name); | |
97100fc8 | 759 | drive->dev_flags |= IDE_DFLAG_NOFLUSH; |
6e87543a BZ |
760 | } |
761 | if (ide_noprobe & (1 << i)) { | |
762 | printk(KERN_INFO "ide: skipping probe for %s\n", drive->name); | |
97100fc8 | 763 | drive->dev_flags |= IDE_DFLAG_NOPROBE; |
6e87543a BZ |
764 | } |
765 | if (ide_nowerr & (1 << i)) { | |
3a7d2484 | 766 | printk(KERN_INFO "ide: ignoring the ATA_DF bit for %s\n", |
6e87543a BZ |
767 | drive->name); |
768 | drive->bad_wstat = BAD_R_STAT; | |
769 | } | |
4706a7e0 BZ |
770 | if (ide_cdroms & (1 << i)) { |
771 | printk(KERN_INFO "ide: forcing %s as a CD-ROM\n", drive->name); | |
97100fc8 | 772 | drive->dev_flags |= IDE_DFLAG_PRESENT; |
4706a7e0 BZ |
773 | drive->media = ide_cdrom; |
774 | /* an ATAPI device ignores DRDY */ | |
775 | drive->ready_stat = 0; | |
776 | } | |
777 | if (ide_disks & (1 << i)) { | |
778 | drive->cyl = drive->bios_cyl = ide_disks_chs[i].cyl; | |
779 | drive->head = drive->bios_head = ide_disks_chs[i].head; | |
780 | drive->sect = drive->bios_sect = ide_disks_chs[i].sect; | |
97100fc8 | 781 | |
4706a7e0 BZ |
782 | printk(KERN_INFO "ide: forcing %s as a disk (%d/%d/%d)\n", |
783 | drive->name, | |
784 | drive->cyl, drive->head, drive->sect); | |
97100fc8 BZ |
785 | |
786 | drive->dev_flags |= IDE_DFLAG_FORCED_GEOM | IDE_DFLAG_PRESENT; | |
4706a7e0 | 787 | drive->media = ide_disk; |
3a7d2484 | 788 | drive->ready_stat = ATA_DRDY; |
4706a7e0 | 789 | } |
6e87543a BZ |
790 | } |
791 | ||
9fd91d95 BZ |
792 | static unsigned int ide_ignore_cable; |
793 | ||
794 | static int ide_set_ignore_cable(const char *s, struct kernel_param *kp) | |
795 | { | |
796 | int i, j = 1; | |
797 | ||
798 | if (sscanf(s, "%d:%d", &i, &j) != 2 && sscanf(s, "%d", &i) != 1) | |
799 | return -EINVAL; | |
800 | ||
801 | if (i >= MAX_HWIFS || j < 0 || j > 1) | |
802 | return -EINVAL; | |
803 | ||
804 | if (j) | |
805 | ide_ignore_cable |= (1 << i); | |
806 | else | |
807 | ide_ignore_cable &= (1 << i); | |
808 | ||
809 | return 0; | |
810 | } | |
811 | ||
812 | module_param_call(ignore_cable, ide_set_ignore_cable, NULL, NULL, 0); | |
813 | MODULE_PARM_DESC(ignore_cable, "ignore cable detection"); | |
814 | ||
815 | void ide_port_apply_params(ide_hwif_t *hwif) | |
816 | { | |
6e87543a BZ |
817 | int i; |
818 | ||
9fd91d95 BZ |
819 | if (ide_ignore_cable & (1 << hwif->index)) { |
820 | printk(KERN_INFO "ide: ignoring cable detection for %s\n", | |
821 | hwif->name); | |
822 | hwif->cbl = ATA_CBL_PATA40_SHORT; | |
823 | } | |
6e87543a BZ |
824 | |
825 | for (i = 0; i < MAX_DRIVES; i++) | |
123995b9 | 826 | ide_dev_apply_params(&hwif->drives[i], i); |
9fd91d95 BZ |
827 | } |
828 | ||
1da177e4 LT |
829 | /* |
830 | * This is gets invoked once during initialization, to set *everything* up | |
831 | */ | |
832 | static int __init ide_init(void) | |
833 | { | |
349ae23f RD |
834 | int ret; |
835 | ||
eba8ff94 | 836 | printk(KERN_INFO "Uniform Multi-Platform E-IDE driver\n"); |
537f06c5 | 837 | |
349ae23f RD |
838 | ret = bus_register(&ide_bus_type); |
839 | if (ret < 0) { | |
840 | printk(KERN_WARNING "IDE: bus_register error: %d\n", ret); | |
841 | return ret; | |
842 | } | |
1da177e4 | 843 | |
f74c9141 BZ |
844 | ide_port_class = class_create(THIS_MODULE, "ide_port"); |
845 | if (IS_ERR(ide_port_class)) { | |
846 | ret = PTR_ERR(ide_port_class); | |
847 | goto out_port_class; | |
848 | } | |
f74c9141 | 849 | |
5cbf79cd | 850 | proc_ide_create(); |
1da177e4 | 851 | |
1da177e4 | 852 | return 0; |
f74c9141 BZ |
853 | |
854 | out_port_class: | |
855 | bus_unregister(&ide_bus_type); | |
856 | ||
857 | return ret; | |
1da177e4 LT |
858 | } |
859 | ||
931ee0dc | 860 | static void __exit ide_exit(void) |
1da177e4 | 861 | { |
1da177e4 | 862 | proc_ide_destroy(); |
1da177e4 | 863 | |
f74c9141 BZ |
864 | class_destroy(ide_port_class); |
865 | ||
1da177e4 LT |
866 | bus_unregister(&ide_bus_type); |
867 | } | |
868 | ||
1da177e4 | 869 | module_init(ide_init); |
931ee0dc | 870 | module_exit(ide_exit); |
1da177e4 | 871 | |
931ee0dc | 872 | MODULE_LICENSE("GPL"); |