Commit | Line | Data |
---|---|---|
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 | { |
1da177e4 LT |
178 | BUG_ON(in_interrupt()); |
179 | BUG_ON(irqs_disabled()); | |
bd8a59e2 | 180 | |
ef29888e | 181 | mutex_lock(&ide_cfg_mtx); |
1da177e4 | 182 | |
bd8a59e2 BZ |
183 | if (hwif->present) { |
184 | __ide_port_unregister_devices(hwif); | |
185 | hwif->present = 0; | |
186 | } | |
1da177e4 | 187 | |
5cbf79cd | 188 | ide_proc_unregister_port(hwif); |
1da177e4 | 189 | |
ae86afae | 190 | free_irq(hwif->irq, hwif); |
1da177e4 | 191 | |
96e5ad30 | 192 | ide_remove_port_from_hwgroup(hwif); |
1da177e4 | 193 | |
f74c9141 | 194 | device_unregister(hwif->portdev); |
1da177e4 | 195 | device_unregister(&hwif->gendev); |
f36d4024 | 196 | wait_for_completion(&hwif->gendev_rel_comp); |
1da177e4 LT |
197 | |
198 | /* | |
199 | * Remove us from the kernel's knowledge | |
200 | */ | |
201 | blk_unregister_region(MKDEV(hwif->major, 0), MAX_DRIVES<<PARTN_BITS); | |
202 | kfree(hwif->sg_table); | |
203 | unregister_blkdev(hwif->major, hwif->name); | |
1da177e4 | 204 | |
2bbd57ca | 205 | ide_release_dma_engine(hwif); |
1da177e4 | 206 | |
ef29888e | 207 | mutex_unlock(&ide_cfg_mtx); |
1da177e4 LT |
208 | } |
209 | ||
57c802e8 BZ |
210 | void ide_init_port_hw(ide_hwif_t *hwif, hw_regs_t *hw) |
211 | { | |
4c3032d8 | 212 | memcpy(&hwif->io_ports, &hw->io_ports, sizeof(hwif->io_ports)); |
57c802e8 | 213 | hwif->irq = hw->irq; |
57c802e8 | 214 | hwif->chipset = hw->chipset; |
c56c5648 BZ |
215 | hwif->dev = hw->dev; |
216 | hwif->gendev.parent = hw->parent ? hw->parent : hw->dev; | |
57c802e8 | 217 | hwif->ack_intr = hw->ack_intr; |
d6276b5f | 218 | hwif->config_data = hw->config; |
57c802e8 | 219 | } |
57c802e8 | 220 | |
1da177e4 LT |
221 | /* |
222 | * Locks for IDE setting functionality | |
223 | */ | |
224 | ||
f9383c42 | 225 | DEFINE_MUTEX(ide_setting_mtx); |
1da177e4 | 226 | |
8185d5aa BZ |
227 | ide_devset_get(io_32bit, io_32bit); |
228 | ||
92f1f8fd | 229 | static int set_io_32bit(ide_drive_t *drive, int arg) |
1da177e4 | 230 | { |
97100fc8 | 231 | if (drive->dev_flags & IDE_DFLAG_NO_IO_32BIT) |
1497943e BZ |
232 | return -EPERM; |
233 | ||
234 | if (arg < 0 || arg > 1 + (SUPPORT_VLB_SYNC << 1)) | |
235 | return -EINVAL; | |
236 | ||
1da177e4 | 237 | drive->io_32bit = arg; |
644a9d76 | 238 | |
1da177e4 LT |
239 | return 0; |
240 | } | |
241 | ||
97100fc8 | 242 | ide_devset_get_flag(ksettings, IDE_DFLAG_KEEP_SETTINGS); |
8185d5aa | 243 | |
92f1f8fd | 244 | static int set_ksettings(ide_drive_t *drive, int arg) |
1497943e BZ |
245 | { |
246 | if (arg < 0 || arg > 1) | |
247 | return -EINVAL; | |
248 | ||
97100fc8 BZ |
249 | if (arg) |
250 | drive->dev_flags |= IDE_DFLAG_KEEP_SETTINGS; | |
251 | else | |
252 | drive->dev_flags &= ~IDE_DFLAG_KEEP_SETTINGS; | |
1497943e BZ |
253 | |
254 | return 0; | |
255 | } | |
256 | ||
97100fc8 | 257 | ide_devset_get_flag(using_dma, IDE_DFLAG_USING_DMA); |
8185d5aa | 258 | |
92f1f8fd | 259 | static int set_using_dma(ide_drive_t *drive, int arg) |
1da177e4 LT |
260 | { |
261 | #ifdef CONFIG_BLK_DEV_IDEDMA | |
87996204 BZ |
262 | int err = -EPERM; |
263 | ||
1497943e BZ |
264 | if (arg < 0 || arg > 1) |
265 | return -EINVAL; | |
266 | ||
48fb2688 | 267 | if (ata_id_has_dma(drive->id) == 0) |
87996204 BZ |
268 | goto out; |
269 | ||
92f1f8fd | 270 | if (drive->hwif->dma_ops == NULL) |
87996204 BZ |
271 | goto out; |
272 | ||
87996204 BZ |
273 | err = 0; |
274 | ||
1da177e4 | 275 | if (arg) { |
23b1bd45 | 276 | if (ide_set_dma(drive)) |
87996204 | 277 | err = -EIO; |
7469aaf6 BZ |
278 | } else |
279 | ide_dma_off(drive); | |
87996204 | 280 | |
87996204 BZ |
281 | out: |
282 | return err; | |
1da177e4 | 283 | #else |
1497943e BZ |
284 | if (arg < 0 || arg > 1) |
285 | return -EINVAL; | |
286 | ||
1da177e4 LT |
287 | return -EPERM; |
288 | #endif | |
289 | } | |
290 | ||
6982daf7 BZ |
291 | /* |
292 | * handle HDIO_SET_PIO_MODE ioctl abusers here, eventually it will go away | |
293 | */ | |
294 | static int set_pio_mode_abuse(ide_hwif_t *hwif, u8 req_pio) | |
295 | { | |
296 | switch (req_pio) { | |
297 | case 202: | |
298 | case 201: | |
299 | case 200: | |
300 | case 102: | |
301 | case 101: | |
302 | case 100: | |
303 | return (hwif->host_flags & IDE_HFLAG_ABUSE_DMA_MODES) ? 1 : 0; | |
304 | case 9: | |
305 | case 8: | |
306 | return (hwif->host_flags & IDE_HFLAG_ABUSE_PREFETCH) ? 1 : 0; | |
307 | case 7: | |
308 | case 6: | |
309 | return (hwif->host_flags & IDE_HFLAG_ABUSE_FAST_DEVSEL) ? 1 : 0; | |
310 | default: | |
311 | return 0; | |
312 | } | |
313 | } | |
314 | ||
92f1f8fd | 315 | static int set_pio_mode(ide_drive_t *drive, int arg) |
1da177e4 | 316 | { |
784506cb | 317 | ide_hwif_t *hwif = drive->hwif; |
2a2ca6a9 | 318 | ide_hwgroup_t *hwgroup = hwif->hwgroup; |
ac95beed | 319 | const struct ide_port_ops *port_ops = hwif->port_ops; |
1da177e4 | 320 | |
1497943e BZ |
321 | if (arg < 0 || arg > 255) |
322 | return -EINVAL; | |
323 | ||
ac95beed | 324 | if (port_ops == NULL || port_ops->set_pio_mode == NULL || |
784506cb | 325 | (hwif->host_flags & IDE_HFLAG_NO_SET_MODE)) |
1da177e4 | 326 | return -ENOSYS; |
26bcb879 | 327 | |
6982daf7 BZ |
328 | if (set_pio_mode_abuse(drive->hwif, arg)) { |
329 | if (arg == 8 || arg == 9) { | |
330 | unsigned long flags; | |
145b75e9 | 331 | |
6982daf7 | 332 | /* take lock for IDE_DFLAG_[NO_]UNMASK/[NO_]IO_32BIT */ |
2a2ca6a9 | 333 | spin_lock_irqsave(&hwgroup->lock, flags); |
6982daf7 | 334 | port_ops->set_pio_mode(drive, arg); |
2a2ca6a9 | 335 | spin_unlock_irqrestore(&hwgroup->lock, flags); |
6982daf7 BZ |
336 | } else |
337 | port_ops->set_pio_mode(drive, arg); | |
338 | } else { | |
339 | int keep_dma = !!(drive->dev_flags & IDE_DFLAG_USING_DMA); | |
145b75e9 | 340 | |
6982daf7 | 341 | ide_set_pio(drive, arg); |
5b114715 | 342 | |
6982daf7 BZ |
343 | if (hwif->host_flags & IDE_HFLAG_SET_PIO_MODE_KEEP_DMA) { |
344 | if (keep_dma) | |
345 | ide_dma_on(drive); | |
346 | } | |
347 | } | |
5b114715 | 348 | |
1da177e4 LT |
349 | return 0; |
350 | } | |
351 | ||
97100fc8 | 352 | ide_devset_get_flag(unmaskirq, IDE_DFLAG_UNMASK); |
8185d5aa | 353 | |
92f1f8fd | 354 | static int set_unmaskirq(ide_drive_t *drive, int arg) |
1497943e | 355 | { |
97100fc8 | 356 | if (drive->dev_flags & IDE_DFLAG_NO_UNMASK) |
1497943e BZ |
357 | return -EPERM; |
358 | ||
359 | if (arg < 0 || arg > 1) | |
360 | return -EINVAL; | |
361 | ||
97100fc8 BZ |
362 | if (arg) |
363 | drive->dev_flags |= IDE_DFLAG_UNMASK; | |
364 | else | |
365 | drive->dev_flags &= ~IDE_DFLAG_UNMASK; | |
1497943e BZ |
366 | |
367 | return 0; | |
368 | } | |
369 | ||
f8790489 BZ |
370 | ide_ext_devset_rw_sync(io_32bit, io_32bit); |
371 | ide_ext_devset_rw_sync(keepsettings, ksettings); | |
372 | ide_ext_devset_rw_sync(unmaskirq, unmaskirq); | |
373 | ide_ext_devset_rw_sync(using_dma, using_dma); | |
6982daf7 | 374 | __IDE_DEVSET(pio_mode, DS_SYNC, NULL, set_pio_mode); |
92f1f8fd | 375 | |
08da591e BZ |
376 | /** |
377 | * ide_device_get - get an additional reference to a ide_drive_t | |
378 | * @drive: device to get a reference to | |
379 | * | |
380 | * Gets a reference to the ide_drive_t and increments the use count of the | |
381 | * underlying LLDD module. | |
382 | */ | |
383 | int ide_device_get(ide_drive_t *drive) | |
384 | { | |
385 | struct device *host_dev; | |
386 | struct module *module; | |
387 | ||
388 | if (!get_device(&drive->gendev)) | |
389 | return -ENXIO; | |
390 | ||
391 | host_dev = drive->hwif->host->dev[0]; | |
392 | module = host_dev ? host_dev->driver->owner : NULL; | |
393 | ||
394 | if (module && !try_module_get(module)) { | |
395 | put_device(&drive->gendev); | |
396 | return -ENXIO; | |
397 | } | |
398 | ||
399 | return 0; | |
400 | } | |
401 | EXPORT_SYMBOL_GPL(ide_device_get); | |
402 | ||
403 | /** | |
404 | * ide_device_put - release a reference to a ide_drive_t | |
405 | * @drive: device to release a reference on | |
406 | * | |
407 | * Release a reference to the ide_drive_t and decrements the use count of | |
408 | * the underlying LLDD module. | |
409 | */ | |
410 | void ide_device_put(ide_drive_t *drive) | |
411 | { | |
412 | #ifdef CONFIG_MODULE_UNLOAD | |
413 | struct device *host_dev = drive->hwif->host->dev[0]; | |
414 | struct module *module = host_dev ? host_dev->driver->owner : NULL; | |
415 | ||
416 | if (module) | |
417 | module_put(module); | |
418 | #endif | |
419 | put_device(&drive->gendev); | |
420 | } | |
421 | EXPORT_SYMBOL_GPL(ide_device_put); | |
422 | ||
8604affd BZ |
423 | static int ide_bus_match(struct device *dev, struct device_driver *drv) |
424 | { | |
425 | return 1; | |
426 | } | |
427 | ||
7eff2e7a | 428 | static int ide_uevent(struct device *dev, struct kobj_uevent_env *env) |
263756ec KS |
429 | { |
430 | ide_drive_t *drive = to_ide_device(dev); | |
7eff2e7a | 431 | |
ebdab07d | 432 | add_uevent_var(env, "MEDIA=%s", ide_media_string(drive)); |
7eff2e7a | 433 | add_uevent_var(env, "DRIVENAME=%s", drive->name); |
ebdab07d | 434 | add_uevent_var(env, "MODALIAS=ide:m-%s", ide_media_string(drive)); |
263756ec KS |
435 | return 0; |
436 | } | |
437 | ||
4031bbe4 RK |
438 | static int generic_ide_probe(struct device *dev) |
439 | { | |
440 | ide_drive_t *drive = to_ide_device(dev); | |
441 | ide_driver_t *drv = to_ide_driver(dev->driver); | |
442 | ||
443 | return drv->probe ? drv->probe(drive) : -ENODEV; | |
444 | } | |
445 | ||
446 | static int generic_ide_remove(struct device *dev) | |
447 | { | |
448 | ide_drive_t *drive = to_ide_device(dev); | |
449 | ide_driver_t *drv = to_ide_driver(dev->driver); | |
450 | ||
451 | if (drv->remove) | |
452 | drv->remove(drive); | |
453 | ||
454 | return 0; | |
455 | } | |
456 | ||
457 | static void generic_ide_shutdown(struct device *dev) | |
458 | { | |
459 | ide_drive_t *drive = to_ide_device(dev); | |
460 | ide_driver_t *drv = to_ide_driver(dev->driver); | |
461 | ||
462 | if (dev->driver && drv->shutdown) | |
463 | drv->shutdown(drive); | |
464 | } | |
465 | ||
1da177e4 LT |
466 | struct bus_type ide_bus_type = { |
467 | .name = "ide", | |
8604affd | 468 | .match = ide_bus_match, |
263756ec | 469 | .uevent = ide_uevent, |
4031bbe4 RK |
470 | .probe = generic_ide_probe, |
471 | .remove = generic_ide_remove, | |
472 | .shutdown = generic_ide_shutdown, | |
263756ec | 473 | .dev_attrs = ide_dev_attrs, |
1da177e4 LT |
474 | .suspend = generic_ide_suspend, |
475 | .resume = generic_ide_resume, | |
476 | }; | |
477 | ||
8604affd BZ |
478 | EXPORT_SYMBOL_GPL(ide_bus_type); |
479 | ||
ebae41a5 BZ |
480 | int ide_vlb_clk; |
481 | EXPORT_SYMBOL_GPL(ide_vlb_clk); | |
482 | ||
483 | module_param_named(vlb_clock, ide_vlb_clk, int, 0); | |
484 | MODULE_PARM_DESC(vlb_clock, "VLB clock frequency (in MHz)"); | |
485 | ||
486 | int ide_pci_clk; | |
487 | EXPORT_SYMBOL_GPL(ide_pci_clk); | |
488 | ||
489 | module_param_named(pci_clock, ide_pci_clk, int, 0); | |
490 | MODULE_PARM_DESC(pci_clock, "PCI bus clock frequency (in MHz)"); | |
491 | ||
6e87543a BZ |
492 | static int ide_set_dev_param_mask(const char *s, struct kernel_param *kp) |
493 | { | |
494 | int a, b, i, j = 1; | |
495 | unsigned int *dev_param_mask = (unsigned int *)kp->arg; | |
496 | ||
497 | if (sscanf(s, "%d.%d:%d", &a, &b, &j) != 3 && | |
498 | sscanf(s, "%d.%d", &a, &b) != 2) | |
499 | return -EINVAL; | |
500 | ||
501 | i = a * MAX_DRIVES + b; | |
502 | ||
503 | if (i >= MAX_HWIFS * MAX_DRIVES || j < 0 || j > 1) | |
504 | return -EINVAL; | |
505 | ||
506 | if (j) | |
507 | *dev_param_mask |= (1 << i); | |
508 | else | |
509 | *dev_param_mask &= (1 << i); | |
510 | ||
511 | return 0; | |
512 | } | |
513 | ||
514 | static unsigned int ide_nodma; | |
515 | ||
516 | module_param_call(nodma, ide_set_dev_param_mask, NULL, &ide_nodma, 0); | |
517 | MODULE_PARM_DESC(nodma, "disallow DMA for a device"); | |
518 | ||
519 | static unsigned int ide_noflush; | |
520 | ||
521 | module_param_call(noflush, ide_set_dev_param_mask, NULL, &ide_noflush, 0); | |
522 | MODULE_PARM_DESC(noflush, "disable flush requests for a device"); | |
523 | ||
524 | static unsigned int ide_noprobe; | |
525 | ||
526 | module_param_call(noprobe, ide_set_dev_param_mask, NULL, &ide_noprobe, 0); | |
527 | MODULE_PARM_DESC(noprobe, "skip probing for a device"); | |
528 | ||
529 | static unsigned int ide_nowerr; | |
530 | ||
531 | module_param_call(nowerr, ide_set_dev_param_mask, NULL, &ide_nowerr, 0); | |
3a7d2484 | 532 | MODULE_PARM_DESC(nowerr, "ignore the ATA_DF bit for a device"); |
6e87543a | 533 | |
4706a7e0 BZ |
534 | static unsigned int ide_cdroms; |
535 | ||
536 | module_param_call(cdrom, ide_set_dev_param_mask, NULL, &ide_cdroms, 0); | |
537 | MODULE_PARM_DESC(cdrom, "force device as a CD-ROM"); | |
538 | ||
539 | struct chs_geom { | |
540 | unsigned int cyl; | |
541 | u8 head; | |
542 | u8 sect; | |
543 | }; | |
544 | ||
545 | static unsigned int ide_disks; | |
546 | static struct chs_geom ide_disks_chs[MAX_HWIFS * MAX_DRIVES]; | |
547 | ||
548 | static int ide_set_disk_chs(const char *str, struct kernel_param *kp) | |
549 | { | |
550 | int a, b, c = 0, h = 0, s = 0, i, j = 1; | |
551 | ||
552 | if (sscanf(str, "%d.%d:%d,%d,%d", &a, &b, &c, &h, &s) != 5 && | |
553 | sscanf(str, "%d.%d:%d", &a, &b, &j) != 3) | |
554 | return -EINVAL; | |
555 | ||
556 | i = a * MAX_DRIVES + b; | |
557 | ||
558 | if (i >= MAX_HWIFS * MAX_DRIVES || j < 0 || j > 1) | |
559 | return -EINVAL; | |
560 | ||
561 | if (c > INT_MAX || h > 255 || s > 255) | |
562 | return -EINVAL; | |
563 | ||
564 | if (j) | |
565 | ide_disks |= (1 << i); | |
566 | else | |
567 | ide_disks &= (1 << i); | |
568 | ||
569 | ide_disks_chs[i].cyl = c; | |
570 | ide_disks_chs[i].head = h; | |
571 | ide_disks_chs[i].sect = s; | |
572 | ||
573 | return 0; | |
574 | } | |
575 | ||
576 | module_param_call(chs, ide_set_disk_chs, NULL, NULL, 0); | |
577 | MODULE_PARM_DESC(chs, "force device as a disk (using CHS)"); | |
578 | ||
123995b9 | 579 | static void ide_dev_apply_params(ide_drive_t *drive, u8 unit) |
6e87543a | 580 | { |
123995b9 | 581 | int i = drive->hwif->index * MAX_DRIVES + unit; |
6e87543a BZ |
582 | |
583 | if (ide_nodma & (1 << i)) { | |
584 | printk(KERN_INFO "ide: disallowing DMA for %s\n", drive->name); | |
97100fc8 | 585 | drive->dev_flags |= IDE_DFLAG_NODMA; |
6e87543a BZ |
586 | } |
587 | if (ide_noflush & (1 << i)) { | |
588 | printk(KERN_INFO "ide: disabling flush requests for %s\n", | |
589 | drive->name); | |
97100fc8 | 590 | drive->dev_flags |= IDE_DFLAG_NOFLUSH; |
6e87543a BZ |
591 | } |
592 | if (ide_noprobe & (1 << i)) { | |
593 | printk(KERN_INFO "ide: skipping probe for %s\n", drive->name); | |
97100fc8 | 594 | drive->dev_flags |= IDE_DFLAG_NOPROBE; |
6e87543a BZ |
595 | } |
596 | if (ide_nowerr & (1 << i)) { | |
3a7d2484 | 597 | printk(KERN_INFO "ide: ignoring the ATA_DF bit for %s\n", |
6e87543a BZ |
598 | drive->name); |
599 | drive->bad_wstat = BAD_R_STAT; | |
600 | } | |
4706a7e0 BZ |
601 | if (ide_cdroms & (1 << i)) { |
602 | printk(KERN_INFO "ide: forcing %s as a CD-ROM\n", drive->name); | |
97100fc8 | 603 | drive->dev_flags |= IDE_DFLAG_PRESENT; |
4706a7e0 BZ |
604 | drive->media = ide_cdrom; |
605 | /* an ATAPI device ignores DRDY */ | |
606 | drive->ready_stat = 0; | |
607 | } | |
608 | if (ide_disks & (1 << i)) { | |
609 | drive->cyl = drive->bios_cyl = ide_disks_chs[i].cyl; | |
610 | drive->head = drive->bios_head = ide_disks_chs[i].head; | |
611 | drive->sect = drive->bios_sect = ide_disks_chs[i].sect; | |
97100fc8 | 612 | |
4706a7e0 BZ |
613 | printk(KERN_INFO "ide: forcing %s as a disk (%d/%d/%d)\n", |
614 | drive->name, | |
615 | drive->cyl, drive->head, drive->sect); | |
97100fc8 BZ |
616 | |
617 | drive->dev_flags |= IDE_DFLAG_FORCED_GEOM | IDE_DFLAG_PRESENT; | |
4706a7e0 | 618 | drive->media = ide_disk; |
3a7d2484 | 619 | drive->ready_stat = ATA_DRDY; |
4706a7e0 | 620 | } |
6e87543a BZ |
621 | } |
622 | ||
9fd91d95 BZ |
623 | static unsigned int ide_ignore_cable; |
624 | ||
625 | static int ide_set_ignore_cable(const char *s, struct kernel_param *kp) | |
626 | { | |
627 | int i, j = 1; | |
628 | ||
629 | if (sscanf(s, "%d:%d", &i, &j) != 2 && sscanf(s, "%d", &i) != 1) | |
630 | return -EINVAL; | |
631 | ||
632 | if (i >= MAX_HWIFS || j < 0 || j > 1) | |
633 | return -EINVAL; | |
634 | ||
635 | if (j) | |
636 | ide_ignore_cable |= (1 << i); | |
637 | else | |
638 | ide_ignore_cable &= (1 << i); | |
639 | ||
640 | return 0; | |
641 | } | |
642 | ||
643 | module_param_call(ignore_cable, ide_set_ignore_cable, NULL, NULL, 0); | |
644 | MODULE_PARM_DESC(ignore_cable, "ignore cable detection"); | |
645 | ||
646 | void ide_port_apply_params(ide_hwif_t *hwif) | |
647 | { | |
6e87543a BZ |
648 | int i; |
649 | ||
9fd91d95 BZ |
650 | if (ide_ignore_cable & (1 << hwif->index)) { |
651 | printk(KERN_INFO "ide: ignoring cable detection for %s\n", | |
652 | hwif->name); | |
653 | hwif->cbl = ATA_CBL_PATA40_SHORT; | |
654 | } | |
6e87543a BZ |
655 | |
656 | for (i = 0; i < MAX_DRIVES; i++) | |
123995b9 | 657 | ide_dev_apply_params(&hwif->drives[i], i); |
9fd91d95 BZ |
658 | } |
659 | ||
1da177e4 LT |
660 | /* |
661 | * This is gets invoked once during initialization, to set *everything* up | |
662 | */ | |
663 | static int __init ide_init(void) | |
664 | { | |
349ae23f RD |
665 | int ret; |
666 | ||
eba8ff94 | 667 | printk(KERN_INFO "Uniform Multi-Platform E-IDE driver\n"); |
537f06c5 | 668 | |
349ae23f RD |
669 | ret = bus_register(&ide_bus_type); |
670 | if (ret < 0) { | |
671 | printk(KERN_WARNING "IDE: bus_register error: %d\n", ret); | |
672 | return ret; | |
673 | } | |
1da177e4 | 674 | |
f74c9141 BZ |
675 | ide_port_class = class_create(THIS_MODULE, "ide_port"); |
676 | if (IS_ERR(ide_port_class)) { | |
677 | ret = PTR_ERR(ide_port_class); | |
678 | goto out_port_class; | |
679 | } | |
f74c9141 | 680 | |
5cbf79cd | 681 | proc_ide_create(); |
1da177e4 | 682 | |
1da177e4 | 683 | return 0; |
f74c9141 BZ |
684 | |
685 | out_port_class: | |
686 | bus_unregister(&ide_bus_type); | |
687 | ||
688 | return ret; | |
1da177e4 LT |
689 | } |
690 | ||
931ee0dc | 691 | static void __exit ide_exit(void) |
1da177e4 | 692 | { |
1da177e4 | 693 | proc_ide_destroy(); |
1da177e4 | 694 | |
f74c9141 BZ |
695 | class_destroy(ide_port_class); |
696 | ||
1da177e4 LT |
697 | bus_unregister(&ide_bus_type); |
698 | } | |
699 | ||
1da177e4 | 700 | module_init(ide_init); |
931ee0dc | 701 | module_exit(ide_exit); |
1da177e4 | 702 | |
931ee0dc | 703 | MODULE_LICENSE("GPL"); |