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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 | 62 | |
f74c9141 BZ |
63 | struct class *ide_port_class; |
64 | ||
08da591e BZ |
65 | /** |
66 | * ide_device_get - get an additional reference to a ide_drive_t | |
67 | * @drive: device to get a reference to | |
68 | * | |
69 | * Gets a reference to the ide_drive_t and increments the use count of the | |
70 | * underlying LLDD module. | |
71 | */ | |
72 | int ide_device_get(ide_drive_t *drive) | |
73 | { | |
74 | struct device *host_dev; | |
75 | struct module *module; | |
76 | ||
77 | if (!get_device(&drive->gendev)) | |
78 | return -ENXIO; | |
79 | ||
80 | host_dev = drive->hwif->host->dev[0]; | |
81 | module = host_dev ? host_dev->driver->owner : NULL; | |
82 | ||
83 | if (module && !try_module_get(module)) { | |
84 | put_device(&drive->gendev); | |
85 | return -ENXIO; | |
86 | } | |
87 | ||
88 | return 0; | |
89 | } | |
90 | EXPORT_SYMBOL_GPL(ide_device_get); | |
91 | ||
92 | /** | |
93 | * ide_device_put - release a reference to a ide_drive_t | |
94 | * @drive: device to release a reference on | |
95 | * | |
96 | * Release a reference to the ide_drive_t and decrements the use count of | |
97 | * the underlying LLDD module. | |
98 | */ | |
99 | void ide_device_put(ide_drive_t *drive) | |
100 | { | |
101 | #ifdef CONFIG_MODULE_UNLOAD | |
102 | struct device *host_dev = drive->hwif->host->dev[0]; | |
103 | struct module *module = host_dev ? host_dev->driver->owner : NULL; | |
104 | ||
105 | if (module) | |
106 | module_put(module); | |
107 | #endif | |
108 | put_device(&drive->gendev); | |
109 | } | |
110 | EXPORT_SYMBOL_GPL(ide_device_put); | |
111 | ||
8604affd BZ |
112 | static int ide_bus_match(struct device *dev, struct device_driver *drv) |
113 | { | |
114 | return 1; | |
115 | } | |
116 | ||
7eff2e7a | 117 | static int ide_uevent(struct device *dev, struct kobj_uevent_env *env) |
263756ec KS |
118 | { |
119 | ide_drive_t *drive = to_ide_device(dev); | |
7eff2e7a | 120 | |
ebdab07d | 121 | add_uevent_var(env, "MEDIA=%s", ide_media_string(drive)); |
7eff2e7a | 122 | add_uevent_var(env, "DRIVENAME=%s", drive->name); |
ebdab07d | 123 | add_uevent_var(env, "MODALIAS=ide:m-%s", ide_media_string(drive)); |
263756ec KS |
124 | return 0; |
125 | } | |
126 | ||
4031bbe4 RK |
127 | static int generic_ide_probe(struct device *dev) |
128 | { | |
129 | ide_drive_t *drive = to_ide_device(dev); | |
7f3c868b | 130 | struct ide_driver *drv = to_ide_driver(dev->driver); |
4031bbe4 RK |
131 | |
132 | return drv->probe ? drv->probe(drive) : -ENODEV; | |
133 | } | |
134 | ||
135 | static int generic_ide_remove(struct device *dev) | |
136 | { | |
137 | ide_drive_t *drive = to_ide_device(dev); | |
7f3c868b | 138 | struct ide_driver *drv = to_ide_driver(dev->driver); |
4031bbe4 RK |
139 | |
140 | if (drv->remove) | |
141 | drv->remove(drive); | |
142 | ||
143 | return 0; | |
144 | } | |
145 | ||
146 | static void generic_ide_shutdown(struct device *dev) | |
147 | { | |
148 | ide_drive_t *drive = to_ide_device(dev); | |
7f3c868b | 149 | struct ide_driver *drv = to_ide_driver(dev->driver); |
4031bbe4 RK |
150 | |
151 | if (dev->driver && drv->shutdown) | |
152 | drv->shutdown(drive); | |
153 | } | |
154 | ||
1da177e4 LT |
155 | struct bus_type ide_bus_type = { |
156 | .name = "ide", | |
8604affd | 157 | .match = ide_bus_match, |
263756ec | 158 | .uevent = ide_uevent, |
4031bbe4 RK |
159 | .probe = generic_ide_probe, |
160 | .remove = generic_ide_remove, | |
161 | .shutdown = generic_ide_shutdown, | |
263756ec | 162 | .dev_attrs = ide_dev_attrs, |
1da177e4 LT |
163 | .suspend = generic_ide_suspend, |
164 | .resume = generic_ide_resume, | |
165 | }; | |
166 | ||
8604affd BZ |
167 | EXPORT_SYMBOL_GPL(ide_bus_type); |
168 | ||
ebae41a5 BZ |
169 | int ide_vlb_clk; |
170 | EXPORT_SYMBOL_GPL(ide_vlb_clk); | |
171 | ||
172 | module_param_named(vlb_clock, ide_vlb_clk, int, 0); | |
173 | MODULE_PARM_DESC(vlb_clock, "VLB clock frequency (in MHz)"); | |
174 | ||
175 | int ide_pci_clk; | |
176 | EXPORT_SYMBOL_GPL(ide_pci_clk); | |
177 | ||
178 | module_param_named(pci_clock, ide_pci_clk, int, 0); | |
179 | MODULE_PARM_DESC(pci_clock, "PCI bus clock frequency (in MHz)"); | |
180 | ||
6e87543a BZ |
181 | static int ide_set_dev_param_mask(const char *s, struct kernel_param *kp) |
182 | { | |
183 | int a, b, i, j = 1; | |
184 | unsigned int *dev_param_mask = (unsigned int *)kp->arg; | |
185 | ||
0af80c04 | 186 | /* controller . device (0 or 1) [ : 1 (set) | 0 (clear) ] */ |
6e87543a BZ |
187 | if (sscanf(s, "%d.%d:%d", &a, &b, &j) != 3 && |
188 | sscanf(s, "%d.%d", &a, &b) != 2) | |
189 | return -EINVAL; | |
190 | ||
191 | i = a * MAX_DRIVES + b; | |
192 | ||
193 | if (i >= MAX_HWIFS * MAX_DRIVES || j < 0 || j > 1) | |
194 | return -EINVAL; | |
195 | ||
196 | if (j) | |
197 | *dev_param_mask |= (1 << i); | |
198 | else | |
0af80c04 | 199 | *dev_param_mask &= ~(1 << i); |
6e87543a BZ |
200 | |
201 | return 0; | |
202 | } | |
203 | ||
204 | static unsigned int ide_nodma; | |
205 | ||
206 | module_param_call(nodma, ide_set_dev_param_mask, NULL, &ide_nodma, 0); | |
207 | MODULE_PARM_DESC(nodma, "disallow DMA for a device"); | |
208 | ||
209 | static unsigned int ide_noflush; | |
210 | ||
211 | module_param_call(noflush, ide_set_dev_param_mask, NULL, &ide_noflush, 0); | |
212 | MODULE_PARM_DESC(noflush, "disable flush requests for a device"); | |
213 | ||
214 | static unsigned int ide_noprobe; | |
215 | ||
216 | module_param_call(noprobe, ide_set_dev_param_mask, NULL, &ide_noprobe, 0); | |
217 | MODULE_PARM_DESC(noprobe, "skip probing for a device"); | |
218 | ||
219 | static unsigned int ide_nowerr; | |
220 | ||
221 | module_param_call(nowerr, ide_set_dev_param_mask, NULL, &ide_nowerr, 0); | |
3a7d2484 | 222 | MODULE_PARM_DESC(nowerr, "ignore the ATA_DF bit for a device"); |
6e87543a | 223 | |
4706a7e0 BZ |
224 | static unsigned int ide_cdroms; |
225 | ||
226 | module_param_call(cdrom, ide_set_dev_param_mask, NULL, &ide_cdroms, 0); | |
227 | MODULE_PARM_DESC(cdrom, "force device as a CD-ROM"); | |
228 | ||
229 | struct chs_geom { | |
230 | unsigned int cyl; | |
231 | u8 head; | |
232 | u8 sect; | |
233 | }; | |
234 | ||
235 | static unsigned int ide_disks; | |
236 | static struct chs_geom ide_disks_chs[MAX_HWIFS * MAX_DRIVES]; | |
237 | ||
238 | static int ide_set_disk_chs(const char *str, struct kernel_param *kp) | |
239 | { | |
240 | int a, b, c = 0, h = 0, s = 0, i, j = 1; | |
241 | ||
0af80c04 DF |
242 | /* controller . device (0 or 1) : Cylinders , Heads , Sectors */ |
243 | /* controller . device (0 or 1) : 1 (use CHS) | 0 (ignore CHS) */ | |
4706a7e0 BZ |
244 | if (sscanf(str, "%d.%d:%d,%d,%d", &a, &b, &c, &h, &s) != 5 && |
245 | sscanf(str, "%d.%d:%d", &a, &b, &j) != 3) | |
246 | return -EINVAL; | |
247 | ||
248 | i = a * MAX_DRIVES + b; | |
249 | ||
250 | if (i >= MAX_HWIFS * MAX_DRIVES || j < 0 || j > 1) | |
251 | return -EINVAL; | |
252 | ||
253 | if (c > INT_MAX || h > 255 || s > 255) | |
254 | return -EINVAL; | |
255 | ||
256 | if (j) | |
257 | ide_disks |= (1 << i); | |
258 | else | |
0af80c04 | 259 | ide_disks &= ~(1 << i); |
4706a7e0 BZ |
260 | |
261 | ide_disks_chs[i].cyl = c; | |
262 | ide_disks_chs[i].head = h; | |
263 | ide_disks_chs[i].sect = s; | |
264 | ||
265 | return 0; | |
266 | } | |
267 | ||
268 | module_param_call(chs, ide_set_disk_chs, NULL, NULL, 0); | |
269 | MODULE_PARM_DESC(chs, "force device as a disk (using CHS)"); | |
270 | ||
123995b9 | 271 | static void ide_dev_apply_params(ide_drive_t *drive, u8 unit) |
6e87543a | 272 | { |
123995b9 | 273 | int i = drive->hwif->index * MAX_DRIVES + unit; |
6e87543a BZ |
274 | |
275 | if (ide_nodma & (1 << i)) { | |
276 | printk(KERN_INFO "ide: disallowing DMA for %s\n", drive->name); | |
97100fc8 | 277 | drive->dev_flags |= IDE_DFLAG_NODMA; |
6e87543a BZ |
278 | } |
279 | if (ide_noflush & (1 << i)) { | |
280 | printk(KERN_INFO "ide: disabling flush requests for %s\n", | |
281 | drive->name); | |
97100fc8 | 282 | drive->dev_flags |= IDE_DFLAG_NOFLUSH; |
6e87543a BZ |
283 | } |
284 | if (ide_noprobe & (1 << i)) { | |
285 | printk(KERN_INFO "ide: skipping probe for %s\n", drive->name); | |
97100fc8 | 286 | drive->dev_flags |= IDE_DFLAG_NOPROBE; |
6e87543a BZ |
287 | } |
288 | if (ide_nowerr & (1 << i)) { | |
3a7d2484 | 289 | printk(KERN_INFO "ide: ignoring the ATA_DF bit for %s\n", |
6e87543a BZ |
290 | drive->name); |
291 | drive->bad_wstat = BAD_R_STAT; | |
292 | } | |
4706a7e0 BZ |
293 | if (ide_cdroms & (1 << i)) { |
294 | printk(KERN_INFO "ide: forcing %s as a CD-ROM\n", drive->name); | |
97100fc8 | 295 | drive->dev_flags |= IDE_DFLAG_PRESENT; |
4706a7e0 BZ |
296 | drive->media = ide_cdrom; |
297 | /* an ATAPI device ignores DRDY */ | |
298 | drive->ready_stat = 0; | |
299 | } | |
300 | if (ide_disks & (1 << i)) { | |
301 | drive->cyl = drive->bios_cyl = ide_disks_chs[i].cyl; | |
302 | drive->head = drive->bios_head = ide_disks_chs[i].head; | |
303 | drive->sect = drive->bios_sect = ide_disks_chs[i].sect; | |
97100fc8 | 304 | |
4706a7e0 BZ |
305 | printk(KERN_INFO "ide: forcing %s as a disk (%d/%d/%d)\n", |
306 | drive->name, | |
307 | drive->cyl, drive->head, drive->sect); | |
97100fc8 BZ |
308 | |
309 | drive->dev_flags |= IDE_DFLAG_FORCED_GEOM | IDE_DFLAG_PRESENT; | |
4706a7e0 | 310 | drive->media = ide_disk; |
3a7d2484 | 311 | drive->ready_stat = ATA_DRDY; |
4706a7e0 | 312 | } |
6e87543a BZ |
313 | } |
314 | ||
9fd91d95 BZ |
315 | static unsigned int ide_ignore_cable; |
316 | ||
317 | static int ide_set_ignore_cable(const char *s, struct kernel_param *kp) | |
318 | { | |
319 | int i, j = 1; | |
320 | ||
0af80c04 DF |
321 | /* controller (ignore) */ |
322 | /* controller : 1 (ignore) | 0 (use) */ | |
9fd91d95 BZ |
323 | if (sscanf(s, "%d:%d", &i, &j) != 2 && sscanf(s, "%d", &i) != 1) |
324 | return -EINVAL; | |
325 | ||
326 | if (i >= MAX_HWIFS || j < 0 || j > 1) | |
327 | return -EINVAL; | |
328 | ||
329 | if (j) | |
330 | ide_ignore_cable |= (1 << i); | |
331 | else | |
0af80c04 | 332 | ide_ignore_cable &= ~(1 << i); |
9fd91d95 BZ |
333 | |
334 | return 0; | |
335 | } | |
336 | ||
337 | module_param_call(ignore_cable, ide_set_ignore_cable, NULL, NULL, 0); | |
338 | MODULE_PARM_DESC(ignore_cable, "ignore cable detection"); | |
339 | ||
340 | void ide_port_apply_params(ide_hwif_t *hwif) | |
341 | { | |
2bd24a1c | 342 | ide_drive_t *drive; |
6e87543a BZ |
343 | int i; |
344 | ||
9fd91d95 BZ |
345 | if (ide_ignore_cable & (1 << hwif->index)) { |
346 | printk(KERN_INFO "ide: ignoring cable detection for %s\n", | |
347 | hwif->name); | |
348 | hwif->cbl = ATA_CBL_PATA40_SHORT; | |
349 | } | |
6e87543a | 350 | |
2bd24a1c BZ |
351 | ide_port_for_each_dev(i, drive, hwif) |
352 | ide_dev_apply_params(drive, i); | |
9fd91d95 BZ |
353 | } |
354 | ||
1da177e4 LT |
355 | /* |
356 | * This is gets invoked once during initialization, to set *everything* up | |
357 | */ | |
358 | static int __init ide_init(void) | |
359 | { | |
349ae23f RD |
360 | int ret; |
361 | ||
eba8ff94 | 362 | printk(KERN_INFO "Uniform Multi-Platform E-IDE driver\n"); |
537f06c5 | 363 | |
349ae23f RD |
364 | ret = bus_register(&ide_bus_type); |
365 | if (ret < 0) { | |
366 | printk(KERN_WARNING "IDE: bus_register error: %d\n", ret); | |
367 | return ret; | |
368 | } | |
1da177e4 | 369 | |
f74c9141 BZ |
370 | ide_port_class = class_create(THIS_MODULE, "ide_port"); |
371 | if (IS_ERR(ide_port_class)) { | |
372 | ret = PTR_ERR(ide_port_class); | |
373 | goto out_port_class; | |
374 | } | |
f74c9141 | 375 | |
8b803bd1 BZ |
376 | ide_acpi_init(); |
377 | ||
5cbf79cd | 378 | proc_ide_create(); |
1da177e4 | 379 | |
1da177e4 | 380 | return 0; |
f74c9141 BZ |
381 | |
382 | out_port_class: | |
383 | bus_unregister(&ide_bus_type); | |
384 | ||
385 | return ret; | |
1da177e4 LT |
386 | } |
387 | ||
931ee0dc | 388 | static void __exit ide_exit(void) |
1da177e4 | 389 | { |
1da177e4 | 390 | proc_ide_destroy(); |
1da177e4 | 391 | |
f74c9141 BZ |
392 | class_destroy(ide_port_class); |
393 | ||
1da177e4 LT |
394 | bus_unregister(&ide_bus_type); |
395 | } | |
396 | ||
1da177e4 | 397 | module_init(ide_init); |
931ee0dc | 398 | module_exit(ide_exit); |
1da177e4 | 399 | |
931ee0dc | 400 | MODULE_LICENSE("GPL"); |