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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 | |
43514ed1 BZ |
77 | static void ide_port_init_devices_data(ide_hwif_t *); |
78 | ||
1da177e4 LT |
79 | /* |
80 | * Do not even *think* about calling this! | |
81 | */ | |
cbb010c1 | 82 | void ide_init_port_data(ide_hwif_t *hwif, unsigned int index) |
1da177e4 | 83 | { |
1da177e4 LT |
84 | /* bulk initialize hwif & drive info with zeros */ |
85 | memset(hwif, 0, sizeof(ide_hwif_t)); | |
86 | ||
87 | /* fill in any non-zero initial values */ | |
88 | hwif->index = index; | |
89 | hwif->major = ide_hwif_to_major[index]; | |
90 | ||
91 | hwif->name[0] = 'i'; | |
92 | hwif->name[1] = 'd'; | |
93 | hwif->name[2] = 'e'; | |
94 | hwif->name[3] = '0' + index; | |
95 | ||
f36d4024 | 96 | init_completion(&hwif->gendev_rel_comp); |
1da177e4 | 97 | |
374e042c | 98 | hwif->tp_ops = &default_tp_ops; |
43514ed1 BZ |
99 | |
100 | ide_port_init_devices_data(hwif); | |
101 | } | |
43514ed1 BZ |
102 | |
103 | static void ide_port_init_devices_data(ide_hwif_t *hwif) | |
104 | { | |
105 | int unit; | |
106 | ||
1da177e4 LT |
107 | for (unit = 0; unit < MAX_DRIVES; ++unit) { |
108 | ide_drive_t *drive = &hwif->drives[unit]; | |
43514ed1 BZ |
109 | u8 j = (hwif->index * MAX_DRIVES) + unit; |
110 | ||
111 | memset(drive, 0, sizeof(*drive)); | |
1da177e4 LT |
112 | |
113 | drive->media = ide_disk; | |
7f612f27 | 114 | drive->select = (unit << 4) | ATA_DEVICE_OBS; |
1da177e4 | 115 | drive->hwif = hwif; |
3a7d2484 | 116 | drive->ready_stat = ATA_DRDY; |
1da177e4 LT |
117 | drive->bad_wstat = BAD_W_STAT; |
118 | drive->special.b.recalibrate = 1; | |
119 | drive->special.b.set_geometry = 1; | |
120 | drive->name[0] = 'h'; | |
121 | drive->name[1] = 'd'; | |
43514ed1 | 122 | drive->name[2] = 'a' + j; |
1da177e4 | 123 | drive->max_failures = IDE_DEFAULT_MAX_FAILURES; |
43514ed1 | 124 | |
1da177e4 | 125 | INIT_LIST_HEAD(&drive->list); |
f36d4024 | 126 | init_completion(&drive->gendev_rel_comp); |
1da177e4 LT |
127 | } |
128 | } | |
43514ed1 | 129 | |
2dde7861 | 130 | static void __ide_port_unregister_devices(ide_hwif_t *hwif) |
71bf9f6f BZ |
131 | { |
132 | int i; | |
133 | ||
134 | for (i = 0; i < MAX_DRIVES; i++) { | |
135 | ide_drive_t *drive = &hwif->drives[i]; | |
136 | ||
97100fc8 | 137 | if (drive->dev_flags & IDE_DFLAG_PRESENT) { |
71bf9f6f BZ |
138 | device_unregister(&drive->gendev); |
139 | wait_for_completion(&drive->gendev_rel_comp); | |
71bf9f6f BZ |
140 | } |
141 | } | |
142 | } | |
143 | ||
2dde7861 BZ |
144 | void ide_port_unregister_devices(ide_hwif_t *hwif) |
145 | { | |
146 | mutex_lock(&ide_cfg_mtx); | |
2dde7861 BZ |
147 | __ide_port_unregister_devices(hwif); |
148 | hwif->present = 0; | |
149 | ide_port_init_devices_data(hwif); | |
2dde7861 BZ |
150 | mutex_unlock(&ide_cfg_mtx); |
151 | } | |
152 | EXPORT_SYMBOL_GPL(ide_port_unregister_devices); | |
153 | ||
1da177e4 | 154 | /** |
020e322d | 155 | * ide_unregister - free an IDE interface |
387750c3 | 156 | * @hwif: IDE interface |
1da177e4 LT |
157 | * |
158 | * Perform the final unregister of an IDE interface. At the moment | |
159 | * we don't refcount interfaces so this will also get split up. | |
160 | * | |
161 | * Locking: | |
162 | * The caller must not hold the IDE locks | |
163 | * The drive present/vanishing is not yet properly locked | |
164 | * Take care with the callbacks. These have been split to avoid | |
165 | * deadlocking the IDE layer. The shutdown callback is called | |
166 | * before we take the lock and free resources. It is up to the | |
167 | * caller to be sure there is no pending I/O here, and that | |
020e322d SS |
168 | * the interface will not be reopened (present/vanishing locking |
169 | * isn't yet done BTW). After we commit to the final kill we | |
1da177e4 LT |
170 | * call the cleanup callback with the ide locks held. |
171 | * | |
172 | * Unregister restores the hwif structures to the default state. | |
173 | * This is raving bonkers. | |
174 | */ | |
175 | ||
387750c3 | 176 | void ide_unregister(ide_hwif_t *hwif) |
1da177e4 | 177 | { |
387750c3 | 178 | ide_hwif_t *g; |
1da177e4 | 179 | ide_hwgroup_t *hwgroup; |
71bf9f6f | 180 | int irq_count = 0; |
1da177e4 | 181 | |
1da177e4 LT |
182 | BUG_ON(in_interrupt()); |
183 | BUG_ON(irqs_disabled()); | |
bd8a59e2 | 184 | |
ef29888e | 185 | mutex_lock(&ide_cfg_mtx); |
1da177e4 | 186 | |
bd8a59e2 BZ |
187 | if (hwif->present) { |
188 | __ide_port_unregister_devices(hwif); | |
189 | hwif->present = 0; | |
190 | } | |
1da177e4 | 191 | |
5cbf79cd | 192 | ide_proc_unregister_port(hwif); |
1da177e4 LT |
193 | |
194 | hwgroup = hwif->hwgroup; | |
195 | /* | |
196 | * free the irq if we were the only hwif using it | |
197 | */ | |
198 | g = hwgroup->hwif; | |
199 | do { | |
200 | if (g->irq == hwif->irq) | |
201 | ++irq_count; | |
202 | g = g->next; | |
203 | } while (g != hwgroup->hwif); | |
204 | if (irq_count == 1) | |
205 | free_irq(hwif->irq, hwgroup); | |
206 | ||
96e5ad30 | 207 | ide_remove_port_from_hwgroup(hwif); |
1da177e4 | 208 | |
f74c9141 | 209 | device_unregister(hwif->portdev); |
1da177e4 | 210 | device_unregister(&hwif->gendev); |
f36d4024 | 211 | wait_for_completion(&hwif->gendev_rel_comp); |
1da177e4 LT |
212 | |
213 | /* | |
214 | * Remove us from the kernel's knowledge | |
215 | */ | |
216 | blk_unregister_region(MKDEV(hwif->major, 0), MAX_DRIVES<<PARTN_BITS); | |
217 | kfree(hwif->sg_table); | |
218 | unregister_blkdev(hwif->major, hwif->name); | |
1da177e4 | 219 | |
2bbd57ca | 220 | ide_release_dma_engine(hwif); |
1da177e4 | 221 | |
ef29888e | 222 | mutex_unlock(&ide_cfg_mtx); |
1da177e4 LT |
223 | } |
224 | ||
57c802e8 BZ |
225 | void ide_init_port_hw(ide_hwif_t *hwif, hw_regs_t *hw) |
226 | { | |
4c3032d8 | 227 | memcpy(&hwif->io_ports, &hw->io_ports, sizeof(hwif->io_ports)); |
57c802e8 | 228 | hwif->irq = hw->irq; |
57c802e8 | 229 | hwif->chipset = hw->chipset; |
c56c5648 BZ |
230 | hwif->dev = hw->dev; |
231 | hwif->gendev.parent = hw->parent ? hw->parent : hw->dev; | |
57c802e8 | 232 | hwif->ack_intr = hw->ack_intr; |
d6276b5f | 233 | hwif->config_data = hw->config; |
57c802e8 | 234 | } |
57c802e8 | 235 | |
1da177e4 LT |
236 | /* |
237 | * Locks for IDE setting functionality | |
238 | */ | |
239 | ||
f9383c42 | 240 | DEFINE_MUTEX(ide_setting_mtx); |
1da177e4 | 241 | |
8185d5aa BZ |
242 | ide_devset_get(io_32bit, io_32bit); |
243 | ||
92f1f8fd | 244 | static int set_io_32bit(ide_drive_t *drive, int arg) |
1da177e4 | 245 | { |
97100fc8 | 246 | if (drive->dev_flags & IDE_DFLAG_NO_IO_32BIT) |
1497943e BZ |
247 | return -EPERM; |
248 | ||
249 | if (arg < 0 || arg > 1 + (SUPPORT_VLB_SYNC << 1)) | |
250 | return -EINVAL; | |
251 | ||
1da177e4 | 252 | drive->io_32bit = arg; |
644a9d76 | 253 | |
1da177e4 LT |
254 | return 0; |
255 | } | |
256 | ||
97100fc8 | 257 | ide_devset_get_flag(ksettings, IDE_DFLAG_KEEP_SETTINGS); |
8185d5aa | 258 | |
92f1f8fd | 259 | static int set_ksettings(ide_drive_t *drive, int arg) |
1497943e BZ |
260 | { |
261 | if (arg < 0 || arg > 1) | |
262 | return -EINVAL; | |
263 | ||
97100fc8 BZ |
264 | if (arg) |
265 | drive->dev_flags |= IDE_DFLAG_KEEP_SETTINGS; | |
266 | else | |
267 | drive->dev_flags &= ~IDE_DFLAG_KEEP_SETTINGS; | |
1497943e BZ |
268 | |
269 | return 0; | |
270 | } | |
271 | ||
97100fc8 | 272 | ide_devset_get_flag(using_dma, IDE_DFLAG_USING_DMA); |
8185d5aa | 273 | |
92f1f8fd | 274 | static int set_using_dma(ide_drive_t *drive, int arg) |
1da177e4 LT |
275 | { |
276 | #ifdef CONFIG_BLK_DEV_IDEDMA | |
87996204 BZ |
277 | int err = -EPERM; |
278 | ||
1497943e BZ |
279 | if (arg < 0 || arg > 1) |
280 | return -EINVAL; | |
281 | ||
48fb2688 | 282 | if (ata_id_has_dma(drive->id) == 0) |
87996204 BZ |
283 | goto out; |
284 | ||
92f1f8fd | 285 | if (drive->hwif->dma_ops == NULL) |
87996204 BZ |
286 | goto out; |
287 | ||
87996204 BZ |
288 | err = 0; |
289 | ||
1da177e4 | 290 | if (arg) { |
23b1bd45 | 291 | if (ide_set_dma(drive)) |
87996204 | 292 | err = -EIO; |
7469aaf6 BZ |
293 | } else |
294 | ide_dma_off(drive); | |
87996204 | 295 | |
87996204 BZ |
296 | out: |
297 | return err; | |
1da177e4 | 298 | #else |
1497943e BZ |
299 | if (arg < 0 || arg > 1) |
300 | return -EINVAL; | |
301 | ||
1da177e4 LT |
302 | return -EPERM; |
303 | #endif | |
304 | } | |
305 | ||
6982daf7 BZ |
306 | /* |
307 | * handle HDIO_SET_PIO_MODE ioctl abusers here, eventually it will go away | |
308 | */ | |
309 | static int set_pio_mode_abuse(ide_hwif_t *hwif, u8 req_pio) | |
310 | { | |
311 | switch (req_pio) { | |
312 | case 202: | |
313 | case 201: | |
314 | case 200: | |
315 | case 102: | |
316 | case 101: | |
317 | case 100: | |
318 | return (hwif->host_flags & IDE_HFLAG_ABUSE_DMA_MODES) ? 1 : 0; | |
319 | case 9: | |
320 | case 8: | |
321 | return (hwif->host_flags & IDE_HFLAG_ABUSE_PREFETCH) ? 1 : 0; | |
322 | case 7: | |
323 | case 6: | |
324 | return (hwif->host_flags & IDE_HFLAG_ABUSE_FAST_DEVSEL) ? 1 : 0; | |
325 | default: | |
326 | return 0; | |
327 | } | |
328 | } | |
329 | ||
92f1f8fd | 330 | static int set_pio_mode(ide_drive_t *drive, int arg) |
1da177e4 | 331 | { |
784506cb | 332 | ide_hwif_t *hwif = drive->hwif; |
2a2ca6a9 | 333 | ide_hwgroup_t *hwgroup = hwif->hwgroup; |
ac95beed | 334 | const struct ide_port_ops *port_ops = hwif->port_ops; |
1da177e4 | 335 | |
1497943e BZ |
336 | if (arg < 0 || arg > 255) |
337 | return -EINVAL; | |
338 | ||
ac95beed | 339 | if (port_ops == NULL || port_ops->set_pio_mode == NULL || |
784506cb | 340 | (hwif->host_flags & IDE_HFLAG_NO_SET_MODE)) |
1da177e4 | 341 | return -ENOSYS; |
26bcb879 | 342 | |
6982daf7 BZ |
343 | if (set_pio_mode_abuse(drive->hwif, arg)) { |
344 | if (arg == 8 || arg == 9) { | |
345 | unsigned long flags; | |
145b75e9 | 346 | |
6982daf7 | 347 | /* take lock for IDE_DFLAG_[NO_]UNMASK/[NO_]IO_32BIT */ |
2a2ca6a9 | 348 | spin_lock_irqsave(&hwgroup->lock, flags); |
6982daf7 | 349 | port_ops->set_pio_mode(drive, arg); |
2a2ca6a9 | 350 | spin_unlock_irqrestore(&hwgroup->lock, flags); |
6982daf7 BZ |
351 | } else |
352 | port_ops->set_pio_mode(drive, arg); | |
353 | } else { | |
354 | int keep_dma = !!(drive->dev_flags & IDE_DFLAG_USING_DMA); | |
145b75e9 | 355 | |
6982daf7 | 356 | ide_set_pio(drive, arg); |
5b114715 | 357 | |
6982daf7 BZ |
358 | if (hwif->host_flags & IDE_HFLAG_SET_PIO_MODE_KEEP_DMA) { |
359 | if (keep_dma) | |
360 | ide_dma_on(drive); | |
361 | } | |
362 | } | |
5b114715 | 363 | |
1da177e4 LT |
364 | return 0; |
365 | } | |
366 | ||
97100fc8 | 367 | ide_devset_get_flag(unmaskirq, IDE_DFLAG_UNMASK); |
8185d5aa | 368 | |
92f1f8fd | 369 | static int set_unmaskirq(ide_drive_t *drive, int arg) |
1497943e | 370 | { |
97100fc8 | 371 | if (drive->dev_flags & IDE_DFLAG_NO_UNMASK) |
1497943e BZ |
372 | return -EPERM; |
373 | ||
374 | if (arg < 0 || arg > 1) | |
375 | return -EINVAL; | |
376 | ||
97100fc8 BZ |
377 | if (arg) |
378 | drive->dev_flags |= IDE_DFLAG_UNMASK; | |
379 | else | |
380 | drive->dev_flags &= ~IDE_DFLAG_UNMASK; | |
1497943e BZ |
381 | |
382 | return 0; | |
383 | } | |
384 | ||
f8790489 BZ |
385 | ide_ext_devset_rw_sync(io_32bit, io_32bit); |
386 | ide_ext_devset_rw_sync(keepsettings, ksettings); | |
387 | ide_ext_devset_rw_sync(unmaskirq, unmaskirq); | |
388 | ide_ext_devset_rw_sync(using_dma, using_dma); | |
6982daf7 | 389 | __IDE_DEVSET(pio_mode, DS_SYNC, NULL, set_pio_mode); |
92f1f8fd | 390 | |
b887d2e6 | 391 | static int generic_ide_suspend(struct device *dev, pm_message_t mesg) |
1da177e4 | 392 | { |
1ea1031c | 393 | ide_drive_t *drive = dev->driver_data, *pair = ide_get_pair_dev(drive); |
e3a59b4d | 394 | ide_hwif_t *hwif = HWIF(drive); |
5b114715 | 395 | struct request *rq; |
1da177e4 LT |
396 | struct request_pm_state rqpm; |
397 | ide_task_t args; | |
5e32132b | 398 | int ret; |
1da177e4 | 399 | |
1ea1031c BZ |
400 | /* call ACPI _GTM only once */ |
401 | if ((drive->dn & 1) == 0 || pair == NULL) | |
e3a59b4d HR |
402 | ide_acpi_get_timing(hwif); |
403 | ||
1da177e4 LT |
404 | memset(&rqpm, 0, sizeof(rqpm)); |
405 | memset(&args, 0, sizeof(args)); | |
5b114715 FT |
406 | rq = blk_get_request(drive->queue, READ, __GFP_WAIT); |
407 | rq->cmd_type = REQ_TYPE_PM_SUSPEND; | |
408 | rq->special = &args; | |
409 | rq->data = &rqpm; | |
0d346ba0 | 410 | rqpm.pm_step = IDE_PM_START_SUSPEND; |
b887d2e6 DB |
411 | if (mesg.event == PM_EVENT_PRETHAW) |
412 | mesg.event = PM_EVENT_FREEZE; | |
413 | rqpm.pm_state = mesg.event; | |
1da177e4 | 414 | |
5b114715 FT |
415 | ret = blk_execute_rq(drive->queue, NULL, rq, 0); |
416 | blk_put_request(rq); | |
1ea1031c BZ |
417 | |
418 | /* call ACPI _PS3 only after both devices are suspended */ | |
419 | if (ret == 0 && ((drive->dn & 1) || pair == NULL)) | |
5e32132b | 420 | ide_acpi_set_state(hwif, 0); |
1ea1031c | 421 | |
5e32132b | 422 | return ret; |
1da177e4 LT |
423 | } |
424 | ||
425 | static int generic_ide_resume(struct device *dev) | |
426 | { | |
1ea1031c | 427 | ide_drive_t *drive = dev->driver_data, *pair = ide_get_pair_dev(drive); |
e3a59b4d | 428 | ide_hwif_t *hwif = HWIF(drive); |
5b114715 | 429 | struct request *rq; |
1da177e4 LT |
430 | struct request_pm_state rqpm; |
431 | ide_task_t args; | |
0d2157f7 | 432 | int err; |
1da177e4 | 433 | |
1ea1031c BZ |
434 | /* call ACPI _PS0 / _STM only once */ |
435 | if ((drive->dn & 1) == 0 || pair == NULL) { | |
5e32132b | 436 | ide_acpi_set_state(hwif, 1); |
e3a59b4d | 437 | ide_acpi_push_timing(hwif); |
5e32132b | 438 | } |
e3a59b4d HR |
439 | |
440 | ide_acpi_exec_tfs(drive); | |
441 | ||
1da177e4 LT |
442 | memset(&rqpm, 0, sizeof(rqpm)); |
443 | memset(&args, 0, sizeof(args)); | |
5b114715 FT |
444 | rq = blk_get_request(drive->queue, READ, __GFP_WAIT); |
445 | rq->cmd_type = REQ_TYPE_PM_RESUME; | |
446 | rq->cmd_flags |= REQ_PREEMPT; | |
447 | rq->special = &args; | |
448 | rq->data = &rqpm; | |
0d346ba0 | 449 | rqpm.pm_step = IDE_PM_START_RESUME; |
ca078bae | 450 | rqpm.pm_state = PM_EVENT_ON; |
1da177e4 | 451 | |
5b114715 FT |
452 | err = blk_execute_rq(drive->queue, NULL, rq, 1); |
453 | blk_put_request(rq); | |
0d2157f7 | 454 | |
ce9b2b0a RW |
455 | if (err == 0 && dev->driver) { |
456 | ide_driver_t *drv = to_ide_driver(dev->driver); | |
457 | ||
458 | if (drv->resume) | |
459 | drv->resume(drive); | |
460 | } | |
0d2157f7 LT |
461 | |
462 | return err; | |
1da177e4 LT |
463 | } |
464 | ||
08da591e BZ |
465 | /** |
466 | * ide_device_get - get an additional reference to a ide_drive_t | |
467 | * @drive: device to get a reference to | |
468 | * | |
469 | * Gets a reference to the ide_drive_t and increments the use count of the | |
470 | * underlying LLDD module. | |
471 | */ | |
472 | int ide_device_get(ide_drive_t *drive) | |
473 | { | |
474 | struct device *host_dev; | |
475 | struct module *module; | |
476 | ||
477 | if (!get_device(&drive->gendev)) | |
478 | return -ENXIO; | |
479 | ||
480 | host_dev = drive->hwif->host->dev[0]; | |
481 | module = host_dev ? host_dev->driver->owner : NULL; | |
482 | ||
483 | if (module && !try_module_get(module)) { | |
484 | put_device(&drive->gendev); | |
485 | return -ENXIO; | |
486 | } | |
487 | ||
488 | return 0; | |
489 | } | |
490 | EXPORT_SYMBOL_GPL(ide_device_get); | |
491 | ||
492 | /** | |
493 | * ide_device_put - release a reference to a ide_drive_t | |
494 | * @drive: device to release a reference on | |
495 | * | |
496 | * Release a reference to the ide_drive_t and decrements the use count of | |
497 | * the underlying LLDD module. | |
498 | */ | |
499 | void ide_device_put(ide_drive_t *drive) | |
500 | { | |
501 | #ifdef CONFIG_MODULE_UNLOAD | |
502 | struct device *host_dev = drive->hwif->host->dev[0]; | |
503 | struct module *module = host_dev ? host_dev->driver->owner : NULL; | |
504 | ||
505 | if (module) | |
506 | module_put(module); | |
507 | #endif | |
508 | put_device(&drive->gendev); | |
509 | } | |
510 | EXPORT_SYMBOL_GPL(ide_device_put); | |
511 | ||
8604affd BZ |
512 | static int ide_bus_match(struct device *dev, struct device_driver *drv) |
513 | { | |
514 | return 1; | |
515 | } | |
516 | ||
263756ec KS |
517 | static char *media_string(ide_drive_t *drive) |
518 | { | |
519 | switch (drive->media) { | |
520 | case ide_disk: | |
521 | return "disk"; | |
522 | case ide_cdrom: | |
523 | return "cdrom"; | |
524 | case ide_tape: | |
525 | return "tape"; | |
526 | case ide_floppy: | |
527 | return "floppy"; | |
a7a832de DK |
528 | case ide_optical: |
529 | return "optical"; | |
263756ec KS |
530 | default: |
531 | return "UNKNOWN"; | |
532 | } | |
533 | } | |
534 | ||
535 | static ssize_t media_show(struct device *dev, struct device_attribute *attr, char *buf) | |
536 | { | |
537 | ide_drive_t *drive = to_ide_device(dev); | |
538 | return sprintf(buf, "%s\n", media_string(drive)); | |
539 | } | |
540 | ||
541 | static ssize_t drivename_show(struct device *dev, struct device_attribute *attr, char *buf) | |
542 | { | |
543 | ide_drive_t *drive = to_ide_device(dev); | |
544 | return sprintf(buf, "%s\n", drive->name); | |
545 | } | |
546 | ||
547 | static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf) | |
548 | { | |
549 | ide_drive_t *drive = to_ide_device(dev); | |
550 | return sprintf(buf, "ide:m-%s\n", media_string(drive)); | |
551 | } | |
552 | ||
e11b9035 BZ |
553 | static ssize_t model_show(struct device *dev, struct device_attribute *attr, |
554 | char *buf) | |
555 | { | |
556 | ide_drive_t *drive = to_ide_device(dev); | |
4dde4492 | 557 | return sprintf(buf, "%s\n", (char *)&drive->id[ATA_ID_PROD]); |
e11b9035 BZ |
558 | } |
559 | ||
560 | static ssize_t firmware_show(struct device *dev, struct device_attribute *attr, | |
561 | char *buf) | |
562 | { | |
563 | ide_drive_t *drive = to_ide_device(dev); | |
4dde4492 | 564 | return sprintf(buf, "%s\n", (char *)&drive->id[ATA_ID_FW_REV]); |
e11b9035 BZ |
565 | } |
566 | ||
567 | static ssize_t serial_show(struct device *dev, struct device_attribute *attr, | |
568 | char *buf) | |
569 | { | |
570 | ide_drive_t *drive = to_ide_device(dev); | |
4dde4492 | 571 | return sprintf(buf, "%s\n", (char *)&drive->id[ATA_ID_SERNO]); |
e11b9035 BZ |
572 | } |
573 | ||
263756ec KS |
574 | static struct device_attribute ide_dev_attrs[] = { |
575 | __ATTR_RO(media), | |
576 | __ATTR_RO(drivename), | |
577 | __ATTR_RO(modalias), | |
e11b9035 BZ |
578 | __ATTR_RO(model), |
579 | __ATTR_RO(firmware), | |
580 | __ATTR(serial, 0400, serial_show, NULL), | |
4abdc6ee | 581 | __ATTR(unload_heads, 0644, ide_park_show, ide_park_store), |
263756ec KS |
582 | __ATTR_NULL |
583 | }; | |
584 | ||
7eff2e7a | 585 | static int ide_uevent(struct device *dev, struct kobj_uevent_env *env) |
263756ec KS |
586 | { |
587 | ide_drive_t *drive = to_ide_device(dev); | |
7eff2e7a KS |
588 | |
589 | add_uevent_var(env, "MEDIA=%s", media_string(drive)); | |
590 | add_uevent_var(env, "DRIVENAME=%s", drive->name); | |
591 | add_uevent_var(env, "MODALIAS=ide:m-%s", media_string(drive)); | |
263756ec KS |
592 | return 0; |
593 | } | |
594 | ||
4031bbe4 RK |
595 | static int generic_ide_probe(struct device *dev) |
596 | { | |
597 | ide_drive_t *drive = to_ide_device(dev); | |
598 | ide_driver_t *drv = to_ide_driver(dev->driver); | |
599 | ||
600 | return drv->probe ? drv->probe(drive) : -ENODEV; | |
601 | } | |
602 | ||
603 | static int generic_ide_remove(struct device *dev) | |
604 | { | |
605 | ide_drive_t *drive = to_ide_device(dev); | |
606 | ide_driver_t *drv = to_ide_driver(dev->driver); | |
607 | ||
608 | if (drv->remove) | |
609 | drv->remove(drive); | |
610 | ||
611 | return 0; | |
612 | } | |
613 | ||
614 | static void generic_ide_shutdown(struct device *dev) | |
615 | { | |
616 | ide_drive_t *drive = to_ide_device(dev); | |
617 | ide_driver_t *drv = to_ide_driver(dev->driver); | |
618 | ||
619 | if (dev->driver && drv->shutdown) | |
620 | drv->shutdown(drive); | |
621 | } | |
622 | ||
1da177e4 LT |
623 | struct bus_type ide_bus_type = { |
624 | .name = "ide", | |
8604affd | 625 | .match = ide_bus_match, |
263756ec | 626 | .uevent = ide_uevent, |
4031bbe4 RK |
627 | .probe = generic_ide_probe, |
628 | .remove = generic_ide_remove, | |
629 | .shutdown = generic_ide_shutdown, | |
263756ec | 630 | .dev_attrs = ide_dev_attrs, |
1da177e4 LT |
631 | .suspend = generic_ide_suspend, |
632 | .resume = generic_ide_resume, | |
633 | }; | |
634 | ||
8604affd BZ |
635 | EXPORT_SYMBOL_GPL(ide_bus_type); |
636 | ||
ebae41a5 BZ |
637 | int ide_vlb_clk; |
638 | EXPORT_SYMBOL_GPL(ide_vlb_clk); | |
639 | ||
640 | module_param_named(vlb_clock, ide_vlb_clk, int, 0); | |
641 | MODULE_PARM_DESC(vlb_clock, "VLB clock frequency (in MHz)"); | |
642 | ||
643 | int ide_pci_clk; | |
644 | EXPORT_SYMBOL_GPL(ide_pci_clk); | |
645 | ||
646 | module_param_named(pci_clock, ide_pci_clk, int, 0); | |
647 | MODULE_PARM_DESC(pci_clock, "PCI bus clock frequency (in MHz)"); | |
648 | ||
6e87543a BZ |
649 | static int ide_set_dev_param_mask(const char *s, struct kernel_param *kp) |
650 | { | |
651 | int a, b, i, j = 1; | |
652 | unsigned int *dev_param_mask = (unsigned int *)kp->arg; | |
653 | ||
654 | if (sscanf(s, "%d.%d:%d", &a, &b, &j) != 3 && | |
655 | sscanf(s, "%d.%d", &a, &b) != 2) | |
656 | return -EINVAL; | |
657 | ||
658 | i = a * MAX_DRIVES + b; | |
659 | ||
660 | if (i >= MAX_HWIFS * MAX_DRIVES || j < 0 || j > 1) | |
661 | return -EINVAL; | |
662 | ||
663 | if (j) | |
664 | *dev_param_mask |= (1 << i); | |
665 | else | |
666 | *dev_param_mask &= (1 << i); | |
667 | ||
668 | return 0; | |
669 | } | |
670 | ||
671 | static unsigned int ide_nodma; | |
672 | ||
673 | module_param_call(nodma, ide_set_dev_param_mask, NULL, &ide_nodma, 0); | |
674 | MODULE_PARM_DESC(nodma, "disallow DMA for a device"); | |
675 | ||
676 | static unsigned int ide_noflush; | |
677 | ||
678 | module_param_call(noflush, ide_set_dev_param_mask, NULL, &ide_noflush, 0); | |
679 | MODULE_PARM_DESC(noflush, "disable flush requests for a device"); | |
680 | ||
681 | static unsigned int ide_noprobe; | |
682 | ||
683 | module_param_call(noprobe, ide_set_dev_param_mask, NULL, &ide_noprobe, 0); | |
684 | MODULE_PARM_DESC(noprobe, "skip probing for a device"); | |
685 | ||
686 | static unsigned int ide_nowerr; | |
687 | ||
688 | module_param_call(nowerr, ide_set_dev_param_mask, NULL, &ide_nowerr, 0); | |
3a7d2484 | 689 | MODULE_PARM_DESC(nowerr, "ignore the ATA_DF bit for a device"); |
6e87543a | 690 | |
4706a7e0 BZ |
691 | static unsigned int ide_cdroms; |
692 | ||
693 | module_param_call(cdrom, ide_set_dev_param_mask, NULL, &ide_cdroms, 0); | |
694 | MODULE_PARM_DESC(cdrom, "force device as a CD-ROM"); | |
695 | ||
696 | struct chs_geom { | |
697 | unsigned int cyl; | |
698 | u8 head; | |
699 | u8 sect; | |
700 | }; | |
701 | ||
702 | static unsigned int ide_disks; | |
703 | static struct chs_geom ide_disks_chs[MAX_HWIFS * MAX_DRIVES]; | |
704 | ||
705 | static int ide_set_disk_chs(const char *str, struct kernel_param *kp) | |
706 | { | |
707 | int a, b, c = 0, h = 0, s = 0, i, j = 1; | |
708 | ||
709 | if (sscanf(str, "%d.%d:%d,%d,%d", &a, &b, &c, &h, &s) != 5 && | |
710 | sscanf(str, "%d.%d:%d", &a, &b, &j) != 3) | |
711 | return -EINVAL; | |
712 | ||
713 | i = a * MAX_DRIVES + b; | |
714 | ||
715 | if (i >= MAX_HWIFS * MAX_DRIVES || j < 0 || j > 1) | |
716 | return -EINVAL; | |
717 | ||
718 | if (c > INT_MAX || h > 255 || s > 255) | |
719 | return -EINVAL; | |
720 | ||
721 | if (j) | |
722 | ide_disks |= (1 << i); | |
723 | else | |
724 | ide_disks &= (1 << i); | |
725 | ||
726 | ide_disks_chs[i].cyl = c; | |
727 | ide_disks_chs[i].head = h; | |
728 | ide_disks_chs[i].sect = s; | |
729 | ||
730 | return 0; | |
731 | } | |
732 | ||
733 | module_param_call(chs, ide_set_disk_chs, NULL, NULL, 0); | |
734 | MODULE_PARM_DESC(chs, "force device as a disk (using CHS)"); | |
735 | ||
123995b9 | 736 | static void ide_dev_apply_params(ide_drive_t *drive, u8 unit) |
6e87543a | 737 | { |
123995b9 | 738 | int i = drive->hwif->index * MAX_DRIVES + unit; |
6e87543a BZ |
739 | |
740 | if (ide_nodma & (1 << i)) { | |
741 | printk(KERN_INFO "ide: disallowing DMA for %s\n", drive->name); | |
97100fc8 | 742 | drive->dev_flags |= IDE_DFLAG_NODMA; |
6e87543a BZ |
743 | } |
744 | if (ide_noflush & (1 << i)) { | |
745 | printk(KERN_INFO "ide: disabling flush requests for %s\n", | |
746 | drive->name); | |
97100fc8 | 747 | drive->dev_flags |= IDE_DFLAG_NOFLUSH; |
6e87543a BZ |
748 | } |
749 | if (ide_noprobe & (1 << i)) { | |
750 | printk(KERN_INFO "ide: skipping probe for %s\n", drive->name); | |
97100fc8 | 751 | drive->dev_flags |= IDE_DFLAG_NOPROBE; |
6e87543a BZ |
752 | } |
753 | if (ide_nowerr & (1 << i)) { | |
3a7d2484 | 754 | printk(KERN_INFO "ide: ignoring the ATA_DF bit for %s\n", |
6e87543a BZ |
755 | drive->name); |
756 | drive->bad_wstat = BAD_R_STAT; | |
757 | } | |
4706a7e0 BZ |
758 | if (ide_cdroms & (1 << i)) { |
759 | printk(KERN_INFO "ide: forcing %s as a CD-ROM\n", drive->name); | |
97100fc8 | 760 | drive->dev_flags |= IDE_DFLAG_PRESENT; |
4706a7e0 BZ |
761 | drive->media = ide_cdrom; |
762 | /* an ATAPI device ignores DRDY */ | |
763 | drive->ready_stat = 0; | |
764 | } | |
765 | if (ide_disks & (1 << i)) { | |
766 | drive->cyl = drive->bios_cyl = ide_disks_chs[i].cyl; | |
767 | drive->head = drive->bios_head = ide_disks_chs[i].head; | |
768 | drive->sect = drive->bios_sect = ide_disks_chs[i].sect; | |
97100fc8 | 769 | |
4706a7e0 BZ |
770 | printk(KERN_INFO "ide: forcing %s as a disk (%d/%d/%d)\n", |
771 | drive->name, | |
772 | drive->cyl, drive->head, drive->sect); | |
97100fc8 BZ |
773 | |
774 | drive->dev_flags |= IDE_DFLAG_FORCED_GEOM | IDE_DFLAG_PRESENT; | |
4706a7e0 | 775 | drive->media = ide_disk; |
3a7d2484 | 776 | drive->ready_stat = ATA_DRDY; |
4706a7e0 | 777 | } |
6e87543a BZ |
778 | } |
779 | ||
9fd91d95 BZ |
780 | static unsigned int ide_ignore_cable; |
781 | ||
782 | static int ide_set_ignore_cable(const char *s, struct kernel_param *kp) | |
783 | { | |
784 | int i, j = 1; | |
785 | ||
786 | if (sscanf(s, "%d:%d", &i, &j) != 2 && sscanf(s, "%d", &i) != 1) | |
787 | return -EINVAL; | |
788 | ||
789 | if (i >= MAX_HWIFS || j < 0 || j > 1) | |
790 | return -EINVAL; | |
791 | ||
792 | if (j) | |
793 | ide_ignore_cable |= (1 << i); | |
794 | else | |
795 | ide_ignore_cable &= (1 << i); | |
796 | ||
797 | return 0; | |
798 | } | |
799 | ||
800 | module_param_call(ignore_cable, ide_set_ignore_cable, NULL, NULL, 0); | |
801 | MODULE_PARM_DESC(ignore_cable, "ignore cable detection"); | |
802 | ||
803 | void ide_port_apply_params(ide_hwif_t *hwif) | |
804 | { | |
6e87543a BZ |
805 | int i; |
806 | ||
9fd91d95 BZ |
807 | if (ide_ignore_cable & (1 << hwif->index)) { |
808 | printk(KERN_INFO "ide: ignoring cable detection for %s\n", | |
809 | hwif->name); | |
810 | hwif->cbl = ATA_CBL_PATA40_SHORT; | |
811 | } | |
6e87543a BZ |
812 | |
813 | for (i = 0; i < MAX_DRIVES; i++) | |
123995b9 | 814 | ide_dev_apply_params(&hwif->drives[i], i); |
9fd91d95 BZ |
815 | } |
816 | ||
1da177e4 LT |
817 | /* |
818 | * This is gets invoked once during initialization, to set *everything* up | |
819 | */ | |
820 | static int __init ide_init(void) | |
821 | { | |
349ae23f RD |
822 | int ret; |
823 | ||
eba8ff94 | 824 | printk(KERN_INFO "Uniform Multi-Platform E-IDE driver\n"); |
537f06c5 | 825 | |
349ae23f RD |
826 | ret = bus_register(&ide_bus_type); |
827 | if (ret < 0) { | |
828 | printk(KERN_WARNING "IDE: bus_register error: %d\n", ret); | |
829 | return ret; | |
830 | } | |
1da177e4 | 831 | |
f74c9141 BZ |
832 | ide_port_class = class_create(THIS_MODULE, "ide_port"); |
833 | if (IS_ERR(ide_port_class)) { | |
834 | ret = PTR_ERR(ide_port_class); | |
835 | goto out_port_class; | |
836 | } | |
f74c9141 | 837 | |
5cbf79cd | 838 | proc_ide_create(); |
1da177e4 | 839 | |
1da177e4 | 840 | return 0; |
f74c9141 BZ |
841 | |
842 | out_port_class: | |
843 | bus_unregister(&ide_bus_type); | |
844 | ||
845 | return ret; | |
1da177e4 LT |
846 | } |
847 | ||
931ee0dc | 848 | static void __exit ide_exit(void) |
1da177e4 | 849 | { |
1da177e4 | 850 | proc_ide_destroy(); |
1da177e4 | 851 | |
f74c9141 BZ |
852 | class_destroy(ide_port_class); |
853 | ||
1da177e4 LT |
854 | bus_unregister(&ide_bus_type); |
855 | } | |
856 | ||
1da177e4 | 857 | module_init(ide_init); |
931ee0dc | 858 | module_exit(ide_exit); |
1da177e4 | 859 | |
931ee0dc | 860 | MODULE_LICENSE("GPL"); |