Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * toshiba_acpi.c - Toshiba Laptop ACPI Extras | |
3 | * | |
4 | * | |
5 | * Copyright (C) 2002-2004 John Belmonte | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License as published by | |
9 | * the Free Software Foundation; either version 2 of the License, or | |
10 | * (at your option) any later version. | |
11 | * | |
12 | * This program is distributed in the hope that it will be useful, | |
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | * GNU General Public License for more details. | |
16 | * | |
17 | * You should have received a copy of the GNU General Public License | |
18 | * along with this program; if not, write to the Free Software | |
19 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
20 | * | |
21 | * | |
22 | * The devolpment page for this driver is located at | |
23 | * http://memebeam.org/toys/ToshibaAcpiDriver. | |
24 | * | |
25 | * Credits: | |
26 | * Jonathan A. Buzzard - Toshiba HCI info, and critical tips on reverse | |
27 | * engineering the Windows drivers | |
28 | * Yasushi Nagato - changes for linux kernel 2.4 -> 2.5 | |
29 | * Rob Miller - TV out and hotkeys help | |
30 | * | |
31 | * | |
32 | * TODO | |
33 | * | |
34 | */ | |
35 | ||
36 | #define TOSHIBA_ACPI_VERSION "0.18" | |
37 | #define PROC_INTERFACE_VERSION 1 | |
38 | ||
39 | #include <linux/kernel.h> | |
40 | #include <linux/module.h> | |
41 | #include <linux/init.h> | |
42 | #include <linux/types.h> | |
43 | #include <linux/proc_fs.h> | |
44 | #include <asm/uaccess.h> | |
45 | ||
46 | #include <acpi/acpi_drivers.h> | |
47 | ||
48 | MODULE_AUTHOR("John Belmonte"); | |
49 | MODULE_DESCRIPTION("Toshiba Laptop ACPI Extras Driver"); | |
50 | MODULE_LICENSE("GPL"); | |
51 | ||
52 | #define MY_LOGPREFIX "toshiba_acpi: " | |
53 | #define MY_ERR KERN_ERR MY_LOGPREFIX | |
54 | #define MY_NOTICE KERN_NOTICE MY_LOGPREFIX | |
55 | #define MY_INFO KERN_INFO MY_LOGPREFIX | |
56 | ||
57 | /* Toshiba ACPI method paths */ | |
58 | #define METHOD_LCD_BRIGHTNESS "\\_SB_.PCI0.VGA_.LCD_._BCM" | |
59 | #define METHOD_HCI_1 "\\_SB_.VALD.GHCI" | |
60 | #define METHOD_HCI_2 "\\_SB_.VALZ.GHCI" | |
61 | #define METHOD_VIDEO_OUT "\\_SB_.VALX.DSSX" | |
62 | ||
63 | /* Toshiba HCI interface definitions | |
64 | * | |
65 | * HCI is Toshiba's "Hardware Control Interface" which is supposed to | |
66 | * be uniform across all their models. Ideally we would just call | |
67 | * dedicated ACPI methods instead of using this primitive interface. | |
68 | * However the ACPI methods seem to be incomplete in some areas (for | |
69 | * example they allow setting, but not reading, the LCD brightness value), | |
70 | * so this is still useful. | |
71 | */ | |
72 | ||
73 | #define HCI_WORDS 6 | |
74 | ||
75 | /* operations */ | |
76 | #define HCI_SET 0xff00 | |
77 | #define HCI_GET 0xfe00 | |
78 | ||
79 | /* return codes */ | |
80 | #define HCI_SUCCESS 0x0000 | |
81 | #define HCI_FAILURE 0x1000 | |
82 | #define HCI_NOT_SUPPORTED 0x8000 | |
83 | #define HCI_EMPTY 0x8c00 | |
84 | ||
85 | /* registers */ | |
86 | #define HCI_FAN 0x0004 | |
87 | #define HCI_SYSTEM_EVENT 0x0016 | |
88 | #define HCI_VIDEO_OUT 0x001c | |
89 | #define HCI_HOTKEY_EVENT 0x001e | |
90 | #define HCI_LCD_BRIGHTNESS 0x002a | |
91 | ||
92 | /* field definitions */ | |
93 | #define HCI_LCD_BRIGHTNESS_BITS 3 | |
94 | #define HCI_LCD_BRIGHTNESS_SHIFT (16-HCI_LCD_BRIGHTNESS_BITS) | |
95 | #define HCI_LCD_BRIGHTNESS_LEVELS (1 << HCI_LCD_BRIGHTNESS_BITS) | |
96 | #define HCI_VIDEO_OUT_LCD 0x1 | |
97 | #define HCI_VIDEO_OUT_CRT 0x2 | |
98 | #define HCI_VIDEO_OUT_TV 0x4 | |
99 | ||
100 | /* utility | |
101 | */ | |
102 | ||
4be44fcd | 103 | static __inline__ void _set_bit(u32 * word, u32 mask, int value) |
1da177e4 LT |
104 | { |
105 | *word = (*word & ~mask) | (mask * value); | |
106 | } | |
107 | ||
108 | /* acpi interface wrappers | |
109 | */ | |
110 | ||
4be44fcd | 111 | static int is_valid_acpi_path(const char *methodName) |
1da177e4 LT |
112 | { |
113 | acpi_handle handle; | |
114 | acpi_status status; | |
115 | ||
4be44fcd | 116 | status = acpi_get_handle(NULL, (char *)methodName, &handle); |
1da177e4 LT |
117 | return !ACPI_FAILURE(status); |
118 | } | |
119 | ||
4be44fcd | 120 | static int write_acpi_int(const char *methodName, int val) |
1da177e4 LT |
121 | { |
122 | struct acpi_object_list params; | |
123 | union acpi_object in_objs[1]; | |
124 | acpi_status status; | |
125 | ||
4be44fcd | 126 | params.count = sizeof(in_objs) / sizeof(in_objs[0]); |
1da177e4 LT |
127 | params.pointer = in_objs; |
128 | in_objs[0].type = ACPI_TYPE_INTEGER; | |
129 | in_objs[0].integer.value = val; | |
130 | ||
4be44fcd | 131 | status = acpi_evaluate_object(NULL, (char *)methodName, ¶ms, NULL); |
1da177e4 LT |
132 | return (status == AE_OK); |
133 | } | |
134 | ||
135 | #if 0 | |
4be44fcd | 136 | static int read_acpi_int(const char *methodName, int *pVal) |
1da177e4 LT |
137 | { |
138 | struct acpi_buffer results; | |
139 | union acpi_object out_objs[1]; | |
140 | acpi_status status; | |
141 | ||
142 | results.length = sizeof(out_objs); | |
143 | results.pointer = out_objs; | |
144 | ||
4be44fcd | 145 | status = acpi_evaluate_object(0, (char *)methodName, 0, &results); |
1da177e4 LT |
146 | *pVal = out_objs[0].integer.value; |
147 | ||
148 | return (status == AE_OK) && (out_objs[0].type == ACPI_TYPE_INTEGER); | |
149 | } | |
150 | #endif | |
151 | ||
4be44fcd | 152 | static const char *method_hci /*= 0*/ ; |
1da177e4 LT |
153 | |
154 | /* Perform a raw HCI call. Here we don't care about input or output buffer | |
155 | * format. | |
156 | */ | |
4be44fcd | 157 | static acpi_status hci_raw(const u32 in[HCI_WORDS], u32 out[HCI_WORDS]) |
1da177e4 LT |
158 | { |
159 | struct acpi_object_list params; | |
160 | union acpi_object in_objs[HCI_WORDS]; | |
161 | struct acpi_buffer results; | |
4be44fcd | 162 | union acpi_object out_objs[HCI_WORDS + 1]; |
1da177e4 LT |
163 | acpi_status status; |
164 | int i; | |
165 | ||
166 | params.count = HCI_WORDS; | |
167 | params.pointer = in_objs; | |
168 | for (i = 0; i < HCI_WORDS; ++i) { | |
169 | in_objs[i].type = ACPI_TYPE_INTEGER; | |
170 | in_objs[i].integer.value = in[i]; | |
171 | } | |
172 | ||
173 | results.length = sizeof(out_objs); | |
174 | results.pointer = out_objs; | |
175 | ||
4be44fcd LB |
176 | status = acpi_evaluate_object(NULL, (char *)method_hci, ¶ms, |
177 | &results); | |
1da177e4 LT |
178 | if ((status == AE_OK) && (out_objs->package.count <= HCI_WORDS)) { |
179 | for (i = 0; i < out_objs->package.count; ++i) { | |
180 | out[i] = out_objs->package.elements[i].integer.value; | |
181 | } | |
182 | } | |
183 | ||
184 | return status; | |
185 | } | |
186 | ||
187 | /* common hci tasks (get or set one value) | |
188 | * | |
189 | * In addition to the ACPI status, the HCI system returns a result which | |
190 | * may be useful (such as "not supported"). | |
191 | */ | |
192 | ||
4be44fcd | 193 | static acpi_status hci_write1(u32 reg, u32 in1, u32 * result) |
1da177e4 LT |
194 | { |
195 | u32 in[HCI_WORDS] = { HCI_SET, reg, in1, 0, 0, 0 }; | |
196 | u32 out[HCI_WORDS]; | |
197 | acpi_status status = hci_raw(in, out); | |
198 | *result = (status == AE_OK) ? out[0] : HCI_FAILURE; | |
199 | return status; | |
200 | } | |
201 | ||
4be44fcd | 202 | static acpi_status hci_read1(u32 reg, u32 * out1, u32 * result) |
1da177e4 LT |
203 | { |
204 | u32 in[HCI_WORDS] = { HCI_GET, reg, 0, 0, 0, 0 }; | |
205 | u32 out[HCI_WORDS]; | |
206 | acpi_status status = hci_raw(in, out); | |
207 | *out1 = out[2]; | |
208 | *result = (status == AE_OK) ? out[0] : HCI_FAILURE; | |
209 | return status; | |
210 | } | |
211 | ||
4be44fcd LB |
212 | static struct proc_dir_entry *toshiba_proc_dir /*= 0*/ ; |
213 | static int force_fan; | |
214 | static int last_key_event; | |
215 | static int key_event_valid; | |
1da177e4 | 216 | |
4be44fcd LB |
217 | typedef struct _ProcItem { |
218 | const char *name; | |
219 | char *(*read_func) (char *); | |
220 | unsigned long (*write_func) (const char *, unsigned long); | |
1da177e4 LT |
221 | } ProcItem; |
222 | ||
223 | /* proc file handlers | |
224 | */ | |
225 | ||
226 | static int | |
4be44fcd LB |
227 | dispatch_read(char *page, char **start, off_t off, int count, int *eof, |
228 | ProcItem * item) | |
1da177e4 | 229 | { |
4be44fcd | 230 | char *p = page; |
1da177e4 LT |
231 | int len; |
232 | ||
233 | if (off == 0) | |
234 | p = item->read_func(p); | |
235 | ||
236 | /* ISSUE: I don't understand this code */ | |
237 | len = (p - page); | |
4be44fcd LB |
238 | if (len <= off + count) |
239 | *eof = 1; | |
1da177e4 LT |
240 | *start = page + off; |
241 | len -= off; | |
4be44fcd LB |
242 | if (len > count) |
243 | len = count; | |
244 | if (len < 0) | |
245 | len = 0; | |
1da177e4 LT |
246 | return len; |
247 | } | |
248 | ||
249 | static int | |
4be44fcd LB |
250 | dispatch_write(struct file *file, const char __user * buffer, |
251 | unsigned long count, ProcItem * item) | |
1da177e4 LT |
252 | { |
253 | int result; | |
4be44fcd | 254 | char *tmp_buffer; |
1da177e4 LT |
255 | |
256 | /* Arg buffer points to userspace memory, which can't be accessed | |
257 | * directly. Since we're making a copy, zero-terminate the | |
258 | * destination so that sscanf can be used on it safely. | |
259 | */ | |
260 | tmp_buffer = kmalloc(count + 1, GFP_KERNEL); | |
4be44fcd | 261 | if (!tmp_buffer) |
f4224153 PI |
262 | return -ENOMEM; |
263 | ||
1da177e4 LT |
264 | if (copy_from_user(tmp_buffer, buffer, count)) { |
265 | result = -EFAULT; | |
4be44fcd | 266 | } else { |
1da177e4 LT |
267 | tmp_buffer[count] = 0; |
268 | result = item->write_func(tmp_buffer, count); | |
269 | } | |
270 | kfree(tmp_buffer); | |
271 | return result; | |
272 | } | |
273 | ||
4be44fcd | 274 | static char *read_lcd(char *p) |
1da177e4 LT |
275 | { |
276 | u32 hci_result; | |
277 | u32 value; | |
278 | ||
279 | hci_read1(HCI_LCD_BRIGHTNESS, &value, &hci_result); | |
280 | if (hci_result == HCI_SUCCESS) { | |
281 | value = value >> HCI_LCD_BRIGHTNESS_SHIFT; | |
282 | p += sprintf(p, "brightness: %d\n", value); | |
283 | p += sprintf(p, "brightness_levels: %d\n", | |
4be44fcd | 284 | HCI_LCD_BRIGHTNESS_LEVELS); |
1da177e4 LT |
285 | } else { |
286 | printk(MY_ERR "Error reading LCD brightness\n"); | |
287 | } | |
288 | ||
289 | return p; | |
290 | } | |
291 | ||
4be44fcd | 292 | static unsigned long write_lcd(const char *buffer, unsigned long count) |
1da177e4 LT |
293 | { |
294 | int value; | |
295 | u32 hci_result; | |
296 | ||
297 | if (sscanf(buffer, " brightness : %i", &value) == 1 && | |
4be44fcd | 298 | value >= 0 && value < HCI_LCD_BRIGHTNESS_LEVELS) { |
1da177e4 LT |
299 | value = value << HCI_LCD_BRIGHTNESS_SHIFT; |
300 | hci_write1(HCI_LCD_BRIGHTNESS, value, &hci_result); | |
301 | if (hci_result != HCI_SUCCESS) | |
302 | return -EFAULT; | |
303 | } else { | |
304 | return -EINVAL; | |
305 | } | |
306 | ||
307 | return count; | |
308 | } | |
309 | ||
4be44fcd | 310 | static char *read_video(char *p) |
1da177e4 LT |
311 | { |
312 | u32 hci_result; | |
313 | u32 value; | |
314 | ||
315 | hci_read1(HCI_VIDEO_OUT, &value, &hci_result); | |
316 | if (hci_result == HCI_SUCCESS) { | |
317 | int is_lcd = (value & HCI_VIDEO_OUT_LCD) ? 1 : 0; | |
318 | int is_crt = (value & HCI_VIDEO_OUT_CRT) ? 1 : 0; | |
4be44fcd | 319 | int is_tv = (value & HCI_VIDEO_OUT_TV) ? 1 : 0; |
1da177e4 LT |
320 | p += sprintf(p, "lcd_out: %d\n", is_lcd); |
321 | p += sprintf(p, "crt_out: %d\n", is_crt); | |
322 | p += sprintf(p, "tv_out: %d\n", is_tv); | |
323 | } else { | |
324 | printk(MY_ERR "Error reading video out status\n"); | |
325 | } | |
326 | ||
327 | return p; | |
328 | } | |
329 | ||
4be44fcd | 330 | static unsigned long write_video(const char *buffer, unsigned long count) |
1da177e4 LT |
331 | { |
332 | int value; | |
333 | int remain = count; | |
334 | int lcd_out = -1; | |
335 | int crt_out = -1; | |
336 | int tv_out = -1; | |
337 | u32 hci_result; | |
338 | int video_out; | |
339 | ||
340 | /* scan expression. Multiple expressions may be delimited with ; | |
341 | * | |
342 | * NOTE: to keep scanning simple, invalid fields are ignored | |
343 | */ | |
344 | while (remain) { | |
345 | if (sscanf(buffer, " lcd_out : %i", &value) == 1) | |
346 | lcd_out = value & 1; | |
347 | else if (sscanf(buffer, " crt_out : %i", &value) == 1) | |
348 | crt_out = value & 1; | |
349 | else if (sscanf(buffer, " tv_out : %i", &value) == 1) | |
350 | tv_out = value & 1; | |
351 | /* advance to one character past the next ; */ | |
352 | do { | |
353 | ++buffer; | |
354 | --remain; | |
355 | } | |
4be44fcd | 356 | while (remain && *(buffer - 1) != ';'); |
1da177e4 LT |
357 | } |
358 | ||
359 | hci_read1(HCI_VIDEO_OUT, &video_out, &hci_result); | |
360 | if (hci_result == HCI_SUCCESS) { | |
361 | int new_video_out = video_out; | |
362 | if (lcd_out != -1) | |
363 | _set_bit(&new_video_out, HCI_VIDEO_OUT_LCD, lcd_out); | |
364 | if (crt_out != -1) | |
365 | _set_bit(&new_video_out, HCI_VIDEO_OUT_CRT, crt_out); | |
366 | if (tv_out != -1) | |
367 | _set_bit(&new_video_out, HCI_VIDEO_OUT_TV, tv_out); | |
368 | /* To avoid unnecessary video disruption, only write the new | |
369 | * video setting if something changed. */ | |
370 | if (new_video_out != video_out) | |
371 | write_acpi_int(METHOD_VIDEO_OUT, new_video_out); | |
372 | } else { | |
373 | return -EFAULT; | |
374 | } | |
375 | ||
376 | return count; | |
377 | } | |
378 | ||
4be44fcd | 379 | static char *read_fan(char *p) |
1da177e4 LT |
380 | { |
381 | u32 hci_result; | |
382 | u32 value; | |
383 | ||
384 | hci_read1(HCI_FAN, &value, &hci_result); | |
385 | if (hci_result == HCI_SUCCESS) { | |
386 | p += sprintf(p, "running: %d\n", (value > 0)); | |
387 | p += sprintf(p, "force_on: %d\n", force_fan); | |
388 | } else { | |
389 | printk(MY_ERR "Error reading fan status\n"); | |
390 | } | |
391 | ||
392 | return p; | |
393 | } | |
394 | ||
4be44fcd | 395 | static unsigned long write_fan(const char *buffer, unsigned long count) |
1da177e4 LT |
396 | { |
397 | int value; | |
398 | u32 hci_result; | |
399 | ||
400 | if (sscanf(buffer, " force_on : %i", &value) == 1 && | |
4be44fcd | 401 | value >= 0 && value <= 1) { |
1da177e4 LT |
402 | hci_write1(HCI_FAN, value, &hci_result); |
403 | if (hci_result != HCI_SUCCESS) | |
404 | return -EFAULT; | |
405 | else | |
406 | force_fan = value; | |
407 | } else { | |
408 | return -EINVAL; | |
409 | } | |
410 | ||
411 | return count; | |
412 | } | |
413 | ||
4be44fcd | 414 | static char *read_keys(char *p) |
1da177e4 LT |
415 | { |
416 | u32 hci_result; | |
417 | u32 value; | |
418 | ||
419 | if (!key_event_valid) { | |
420 | hci_read1(HCI_SYSTEM_EVENT, &value, &hci_result); | |
421 | if (hci_result == HCI_SUCCESS) { | |
422 | key_event_valid = 1; | |
423 | last_key_event = value; | |
424 | } else if (hci_result == HCI_EMPTY) { | |
425 | /* better luck next time */ | |
426 | } else if (hci_result == HCI_NOT_SUPPORTED) { | |
427 | /* This is a workaround for an unresolved issue on | |
428 | * some machines where system events sporadically | |
429 | * become disabled. */ | |
430 | hci_write1(HCI_SYSTEM_EVENT, 1, &hci_result); | |
431 | printk(MY_NOTICE "Re-enabled hotkeys\n"); | |
432 | } else { | |
433 | printk(MY_ERR "Error reading hotkey status\n"); | |
434 | goto end; | |
435 | } | |
436 | } | |
437 | ||
438 | p += sprintf(p, "hotkey_ready: %d\n", key_event_valid); | |
439 | p += sprintf(p, "hotkey: 0x%04x\n", last_key_event); | |
440 | ||
4be44fcd | 441 | end: |
1da177e4 LT |
442 | return p; |
443 | } | |
444 | ||
4be44fcd | 445 | static unsigned long write_keys(const char *buffer, unsigned long count) |
1da177e4 LT |
446 | { |
447 | int value; | |
448 | ||
4be44fcd | 449 | if (sscanf(buffer, " hotkey_ready : %i", &value) == 1 && value == 0) { |
1da177e4 LT |
450 | key_event_valid = 0; |
451 | } else { | |
452 | return -EINVAL; | |
453 | } | |
454 | ||
455 | return count; | |
456 | } | |
457 | ||
4be44fcd | 458 | static char *read_version(char *p) |
1da177e4 LT |
459 | { |
460 | p += sprintf(p, "driver: %s\n", TOSHIBA_ACPI_VERSION); | |
461 | p += sprintf(p, "proc_interface: %d\n", | |
4be44fcd | 462 | PROC_INTERFACE_VERSION); |
1da177e4 LT |
463 | return p; |
464 | } | |
465 | ||
466 | /* proc and module init | |
467 | */ | |
468 | ||
469 | #define PROC_TOSHIBA "toshiba" | |
470 | ||
4be44fcd LB |
471 | static ProcItem proc_items[] = { |
472 | {"lcd", read_lcd, write_lcd}, | |
473 | {"video", read_video, write_video}, | |
474 | {"fan", read_fan, write_fan}, | |
475 | {"keys", read_keys, write_keys}, | |
476 | {"version", read_version, NULL}, | |
477 | {NULL} | |
1da177e4 LT |
478 | }; |
479 | ||
4be44fcd | 480 | static acpi_status __init add_device(void) |
1da177e4 | 481 | { |
4be44fcd LB |
482 | struct proc_dir_entry *proc; |
483 | ProcItem *item; | |
1da177e4 | 484 | |
4be44fcd | 485 | for (item = proc_items; item->name; ++item) { |
1da177e4 | 486 | proc = create_proc_read_entry(item->name, |
4be44fcd LB |
487 | S_IFREG | S_IRUGO | S_IWUSR, |
488 | toshiba_proc_dir, | |
489 | (read_proc_t *) dispatch_read, | |
490 | item); | |
1da177e4 LT |
491 | if (proc) |
492 | proc->owner = THIS_MODULE; | |
493 | if (proc && item->write_func) | |
4be44fcd | 494 | proc->write_proc = (write_proc_t *) dispatch_write; |
1da177e4 LT |
495 | } |
496 | ||
497 | return AE_OK; | |
498 | } | |
499 | ||
4be44fcd | 500 | static acpi_status __exit remove_device(void) |
1da177e4 | 501 | { |
4be44fcd | 502 | ProcItem *item; |
1da177e4 LT |
503 | |
504 | for (item = proc_items; item->name; ++item) | |
505 | remove_proc_entry(item->name, toshiba_proc_dir); | |
506 | return AE_OK; | |
507 | } | |
508 | ||
4be44fcd | 509 | static int __init toshiba_acpi_init(void) |
1da177e4 LT |
510 | { |
511 | acpi_status status = AE_OK; | |
512 | u32 hci_result; | |
513 | ||
514 | if (acpi_disabled) | |
515 | return -ENODEV; | |
fb9802fa | 516 | |
4be44fcd | 517 | if (!acpi_specific_hotkey_enabled) { |
fb9802fa | 518 | printk(MY_INFO "Using generic hotkey driver\n"); |
4be44fcd | 519 | return -ENODEV; |
fb9802fa | 520 | } |
1da177e4 LT |
521 | /* simple device detection: look for HCI method */ |
522 | if (is_valid_acpi_path(METHOD_HCI_1)) | |
523 | method_hci = METHOD_HCI_1; | |
524 | else if (is_valid_acpi_path(METHOD_HCI_2)) | |
525 | method_hci = METHOD_HCI_2; | |
526 | else | |
527 | return -ENODEV; | |
528 | ||
529 | printk(MY_INFO "Toshiba Laptop ACPI Extras version %s\n", | |
4be44fcd | 530 | TOSHIBA_ACPI_VERSION); |
1da177e4 LT |
531 | printk(MY_INFO " HCI method: %s\n", method_hci); |
532 | ||
533 | force_fan = 0; | |
534 | key_event_valid = 0; | |
535 | ||
536 | /* enable event fifo */ | |
537 | hci_write1(HCI_SYSTEM_EVENT, 1, &hci_result); | |
538 | ||
539 | toshiba_proc_dir = proc_mkdir(PROC_TOSHIBA, acpi_root_dir); | |
540 | if (!toshiba_proc_dir) { | |
541 | status = AE_ERROR; | |
542 | } else { | |
543 | toshiba_proc_dir->owner = THIS_MODULE; | |
544 | status = add_device(); | |
545 | if (ACPI_FAILURE(status)) | |
546 | remove_proc_entry(PROC_TOSHIBA, acpi_root_dir); | |
547 | } | |
548 | ||
549 | return (ACPI_SUCCESS(status)) ? 0 : -ENODEV; | |
550 | } | |
551 | ||
4be44fcd | 552 | static void __exit toshiba_acpi_exit(void) |
1da177e4 LT |
553 | { |
554 | remove_device(); | |
555 | ||
556 | if (toshiba_proc_dir) | |
557 | remove_proc_entry(PROC_TOSHIBA, acpi_root_dir); | |
558 | ||
559 | return; | |
560 | } | |
561 | ||
562 | module_init(toshiba_acpi_init); | |
563 | module_exit(toshiba_acpi_exit); |