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1da177e4 LT |
1 | /* |
2 | * acpi_ec.c - ACPI Embedded Controller Driver ($Revision: 38 $) | |
3 | * | |
4 | * Copyright (C) 2004 Luming Yu <luming.yu@intel.com> | |
5 | * Copyright (C) 2001, 2002 Andy Grover <andrew.grover@intel.com> | |
6 | * Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com> | |
7 | * | |
8 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | |
9 | * | |
10 | * This program is free software; you can redistribute it and/or modify | |
11 | * it under the terms of the GNU General Public License as published by | |
12 | * the Free Software Foundation; either version 2 of the License, or (at | |
13 | * your option) any later version. | |
14 | * | |
15 | * This program is distributed in the hope that it will be useful, but | |
16 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
18 | * General Public License for more details. | |
19 | * | |
20 | * You should have received a copy of the GNU General Public License along | |
21 | * with this program; if not, write to the Free Software Foundation, Inc., | |
22 | * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. | |
23 | * | |
24 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | |
25 | */ | |
26 | ||
27 | #include <linux/kernel.h> | |
28 | #include <linux/module.h> | |
29 | #include <linux/init.h> | |
30 | #include <linux/types.h> | |
31 | #include <linux/delay.h> | |
32 | #include <linux/proc_fs.h> | |
33 | #include <linux/seq_file.h> | |
451566f4 | 34 | #include <linux/interrupt.h> |
1da177e4 LT |
35 | #include <asm/io.h> |
36 | #include <acpi/acpi_bus.h> | |
37 | #include <acpi/acpi_drivers.h> | |
38 | #include <acpi/actypes.h> | |
39 | ||
40 | #define _COMPONENT ACPI_EC_COMPONENT | |
50526df6 | 41 | ACPI_MODULE_NAME("acpi_ec") |
1da177e4 LT |
42 | #define ACPI_EC_COMPONENT 0x00100000 |
43 | #define ACPI_EC_CLASS "embedded_controller" | |
44 | #define ACPI_EC_HID "PNP0C09" | |
45 | #define ACPI_EC_DRIVER_NAME "ACPI Embedded Controller Driver" | |
46 | #define ACPI_EC_DEVICE_NAME "Embedded Controller" | |
47 | #define ACPI_EC_FILE_INFO "info" | |
703959d4 | 48 | |
af3fd140 AS |
49 | #undef PREFIX |
50 | #define PREFIX "ACPI: EC: " | |
51 | ||
703959d4 | 52 | /* EC status register */ |
1da177e4 LT |
53 | #define ACPI_EC_FLAG_OBF 0x01 /* Output buffer full */ |
54 | #define ACPI_EC_FLAG_IBF 0x02 /* Input buffer full */ | |
451566f4 | 55 | #define ACPI_EC_FLAG_BURST 0x10 /* burst mode */ |
1da177e4 | 56 | #define ACPI_EC_FLAG_SCI 0x20 /* EC-SCI occurred */ |
703959d4 DS |
57 | |
58 | /* EC commands */ | |
3261ff4d AS |
59 | enum ec_command { |
60 | ACPI_EC_COMMAND_READ = 0x80, | |
61 | ACPI_EC_COMMAND_WRITE = 0x81, | |
62 | ACPI_EC_BURST_ENABLE = 0x82, | |
63 | ACPI_EC_BURST_DISABLE = 0x83, | |
64 | ACPI_EC_COMMAND_QUERY = 0x84, | |
65 | }; | |
703959d4 | 66 | /* EC events */ |
3261ff4d | 67 | enum ec_event { |
703959d4 DS |
68 | ACPI_EC_EVENT_OBF_1 = 1, /* Output buffer full */ |
69 | ACPI_EC_EVENT_IBF_0, /* Input buffer empty */ | |
70 | }; | |
71 | ||
5c406412 | 72 | #define ACPI_EC_DELAY 500 /* Wait 500ms max. during EC ops */ |
703959d4 | 73 | #define ACPI_EC_UDELAY_GLK 1000 /* Wait 1ms max. to get global lock */ |
703959d4 | 74 | |
3261ff4d | 75 | static enum ec_mode { |
703959d4 | 76 | EC_INTR = 1, /* Output buffer full */ |
6ffb221a | 77 | EC_POLL, /* Input buffer empty */ |
3261ff4d | 78 | } acpi_ec_mode = EC_INTR; |
703959d4 | 79 | |
50526df6 LB |
80 | static int acpi_ec_remove(struct acpi_device *device, int type); |
81 | static int acpi_ec_start(struct acpi_device *device); | |
82 | static int acpi_ec_stop(struct acpi_device *device, int type); | |
703959d4 | 83 | static int acpi_ec_add(struct acpi_device *device); |
1da177e4 LT |
84 | |
85 | static struct acpi_driver acpi_ec_driver = { | |
50526df6 LB |
86 | .name = ACPI_EC_DRIVER_NAME, |
87 | .class = ACPI_EC_CLASS, | |
88 | .ids = ACPI_EC_HID, | |
89 | .ops = { | |
703959d4 | 90 | .add = acpi_ec_add, |
50526df6 LB |
91 | .remove = acpi_ec_remove, |
92 | .start = acpi_ec_start, | |
93 | .stop = acpi_ec_stop, | |
94 | }, | |
1da177e4 | 95 | }; |
6ffb221a DS |
96 | |
97 | /* If we find an EC via the ECDT, we need to keep a ptr to its context */ | |
703959d4 DS |
98 | struct acpi_ec { |
99 | acpi_handle handle; | |
100 | unsigned long uid; | |
a86e2772 | 101 | unsigned long gpe; |
6ffb221a DS |
102 | unsigned long command_addr; |
103 | unsigned long data_addr; | |
703959d4 | 104 | unsigned long global_lock; |
c787a855 | 105 | struct mutex lock; |
5d0c288b | 106 | atomic_t query_pending; |
703959d4 DS |
107 | atomic_t leaving_burst; /* 0 : No, 1 : Yes, 2: abort */ |
108 | wait_queue_head_t wait; | |
6ffb221a | 109 | } *ec_ecdt; |
703959d4 DS |
110 | |
111 | /* External interfaces use first EC only, so remember */ | |
112 | static struct acpi_device *first_ec; | |
703959d4 | 113 | |
1da177e4 LT |
114 | /* -------------------------------------------------------------------------- |
115 | Transaction Management | |
116 | -------------------------------------------------------------------------- */ | |
117 | ||
6ffb221a | 118 | static inline u8 acpi_ec_read_status(struct acpi_ec *ec) |
1da177e4 | 119 | { |
6ffb221a | 120 | return inb(ec->command_addr); |
451566f4 DT |
121 | } |
122 | ||
6ffb221a | 123 | static inline u8 acpi_ec_read_data(struct acpi_ec *ec) |
703959d4 | 124 | { |
6ffb221a | 125 | return inb(ec->data_addr); |
7c6db5e5 DS |
126 | } |
127 | ||
6ffb221a | 128 | static inline void acpi_ec_write_cmd(struct acpi_ec *ec, u8 command) |
45bea155 | 129 | { |
6ffb221a | 130 | outb(command, ec->command_addr); |
45bea155 LY |
131 | } |
132 | ||
6ffb221a | 133 | static inline void acpi_ec_write_data(struct acpi_ec *ec, u8 data) |
45bea155 | 134 | { |
6ffb221a | 135 | outb(data, ec->data_addr); |
703959d4 | 136 | } |
45bea155 | 137 | |
3261ff4d | 138 | static inline int acpi_ec_check_status(struct acpi_ec *ec, enum ec_event event) |
6ffb221a | 139 | { |
bec5a1e0 | 140 | u8 status = acpi_ec_read_status(ec); |
78d0af33 AS |
141 | |
142 | if (event == ACPI_EC_EVENT_OBF_1) { | |
703959d4 DS |
143 | if (status & ACPI_EC_FLAG_OBF) |
144 | return 1; | |
78d0af33 | 145 | } else if (event == ACPI_EC_EVENT_IBF_0) { |
703959d4 DS |
146 | if (!(status & ACPI_EC_FLAG_IBF)) |
147 | return 1; | |
45bea155 LY |
148 | } |
149 | ||
703959d4 | 150 | return 0; |
45bea155 | 151 | } |
451566f4 | 152 | |
3261ff4d | 153 | static int acpi_ec_wait(struct acpi_ec *ec, enum ec_event event) |
7c6db5e5 | 154 | { |
af3fd140 | 155 | if (acpi_ec_mode == EC_POLL) { |
50c1e113 AS |
156 | unsigned long delay = jiffies + msecs_to_jiffies(ACPI_EC_DELAY); |
157 | while (time_before(jiffies, delay)) { | |
af3fd140 | 158 | if (acpi_ec_check_status(ec, event)) |
7c6db5e5 DS |
159 | return 0; |
160 | } | |
af3fd140 AS |
161 | } else { |
162 | if (wait_event_timeout(ec->wait, | |
163 | acpi_ec_check_status(ec, event), | |
164 | msecs_to_jiffies(ACPI_EC_DELAY)) || | |
165 | acpi_ec_check_status(ec, event)) { | |
703959d4 | 166 | return 0; |
af3fd140 AS |
167 | } else { |
168 | printk(KERN_ERR PREFIX "acpi_ec_wait timeout," | |
169 | " status = %d, expect_event = %d\n", | |
170 | acpi_ec_read_status(ec), event); | |
703959d4 | 171 | } |
af3fd140 | 172 | } |
1da177e4 | 173 | |
d550d98d | 174 | return -ETIME; |
1da177e4 LT |
175 | } |
176 | ||
02b28a33 | 177 | #ifdef ACPI_FUTURE_USAGE |
06a2a385 LY |
178 | /* |
179 | * Note: samsung nv5000 doesn't work with ec burst mode. | |
180 | * http://bugzilla.kernel.org/show_bug.cgi?id=4980 | |
181 | */ | |
703959d4 | 182 | int acpi_ec_enter_burst_mode(struct acpi_ec *ec) |
451566f4 | 183 | { |
6ffb221a DS |
184 | u8 tmp = 0; |
185 | u8 status = 0; | |
451566f4 | 186 | |
451566f4 DT |
187 | |
188 | status = acpi_ec_read_status(ec); | |
50526df6 | 189 | if (status != -EINVAL && !(status & ACPI_EC_FLAG_BURST)) { |
703959d4 | 190 | status = acpi_ec_wait(ec, ACPI_EC_EVENT_IBF_0); |
50526df6 | 191 | if (status) |
716e084e | 192 | goto end; |
703959d4 DS |
193 | acpi_ec_write_cmd(ec, ACPI_EC_BURST_ENABLE); |
194 | status = acpi_ec_wait(ec, ACPI_EC_EVENT_OBF_1); | |
195 | tmp = acpi_ec_read_data(ec); | |
50526df6 | 196 | if (tmp != 0x90) { /* Burst ACK byte */ |
d550d98d | 197 | return -EINVAL; |
451566f4 | 198 | } |
668d74c0 LY |
199 | } |
200 | ||
703959d4 | 201 | atomic_set(&ec->leaving_burst, 0); |
d550d98d | 202 | return 0; |
703959d4 DS |
203 | end: |
204 | ACPI_EXCEPTION((AE_INFO, status, "EC wait, burst mode")); | |
d550d98d | 205 | return -1; |
451566f4 DT |
206 | } |
207 | ||
703959d4 | 208 | int acpi_ec_leave_burst_mode(struct acpi_ec *ec) |
451566f4 | 209 | { |
6ffb221a | 210 | u8 status = 0; |
451566f4 | 211 | |
451566f4 | 212 | |
06a2a385 LY |
213 | status = acpi_ec_read_status(ec); |
214 | if (status != -EINVAL && (status & ACPI_EC_FLAG_BURST)){ | |
703959d4 | 215 | status = acpi_ec_wait(ec, ACPI_EC_EVENT_IBF_0); |
06a2a385 LY |
216 | if(status) |
217 | goto end; | |
703959d4 DS |
218 | acpi_ec_write_cmd(ec, ACPI_EC_BURST_DISABLE); |
219 | acpi_ec_wait(ec, ACPI_EC_EVENT_IBF_0); | |
7c6db5e5 | 220 | } |
703959d4 | 221 | atomic_set(&ec->leaving_burst, 1); |
d550d98d | 222 | return 0; |
703959d4 DS |
223 | end: |
224 | ACPI_EXCEPTION((AE_INFO, status, "EC leave burst mode")); | |
d550d98d | 225 | return -1; |
451566f4 | 226 | } |
02b28a33 | 227 | #endif /* ACPI_FUTURE_USAGE */ |
451566f4 | 228 | |
703959d4 | 229 | static int acpi_ec_transaction_unlocked(struct acpi_ec *ec, u8 command, |
3576cf61 DS |
230 | const u8 *wdata, unsigned wdata_len, |
231 | u8 *rdata, unsigned rdata_len) | |
45bea155 | 232 | { |
af3fd140 | 233 | int result = 0; |
45bea155 | 234 | |
703959d4 | 235 | acpi_ec_write_cmd(ec, command); |
45bea155 | 236 | |
78d0af33 | 237 | for (; wdata_len > 0; --wdata_len) { |
703959d4 | 238 | result = acpi_ec_wait(ec, ACPI_EC_EVENT_IBF_0); |
af3fd140 AS |
239 | if (result) { |
240 | printk(KERN_ERR PREFIX "write_cmd timeout, command = %d\n", | |
241 | command); | |
242 | goto end; | |
243 | } | |
703959d4 | 244 | acpi_ec_write_data(ec, *(wdata++)); |
3576cf61 | 245 | } |
45bea155 | 246 | |
d91df1aa | 247 | if (!rdata_len) { |
703959d4 | 248 | result = acpi_ec_wait(ec, ACPI_EC_EVENT_IBF_0); |
af3fd140 AS |
249 | if (result) { |
250 | printk(KERN_ERR PREFIX "finish-write timeout, command = %d\n", | |
251 | command); | |
252 | goto end; | |
253 | } | |
5d0c288b AS |
254 | } else if (command == ACPI_EC_COMMAND_QUERY) { |
255 | atomic_set(&ec->query_pending, 0); | |
7c6db5e5 | 256 | } |
45bea155 | 257 | |
78d0af33 | 258 | for (; rdata_len > 0; --rdata_len) { |
703959d4 | 259 | result = acpi_ec_wait(ec, ACPI_EC_EVENT_OBF_1); |
af3fd140 AS |
260 | if (result) { |
261 | printk(KERN_ERR PREFIX "read timeout, command = %d\n", | |
262 | command); | |
263 | goto end; | |
264 | } | |
50526df6 | 265 | |
6ffb221a | 266 | *(rdata++) = acpi_ec_read_data(ec); |
7c6db5e5 | 267 | } |
af3fd140 AS |
268 | end: |
269 | return result; | |
45bea155 LY |
270 | } |
271 | ||
3576cf61 DS |
272 | static int acpi_ec_transaction(struct acpi_ec *ec, u8 command, |
273 | const u8 *wdata, unsigned wdata_len, | |
274 | u8 *rdata, unsigned rdata_len) | |
1da177e4 | 275 | { |
d7a76e4c | 276 | int status; |
50526df6 | 277 | u32 glk; |
1da177e4 | 278 | |
d7a76e4c | 279 | if (!ec || (wdata_len && !wdata) || (rdata_len && !rdata)) |
d550d98d | 280 | return -EINVAL; |
1da177e4 | 281 | |
d7a76e4c LP |
282 | if (rdata) |
283 | memset(rdata, 0, rdata_len); | |
1da177e4 | 284 | |
523953b4 | 285 | mutex_lock(&ec->lock); |
703959d4 | 286 | if (ec->global_lock) { |
1da177e4 LT |
287 | status = acpi_acquire_global_lock(ACPI_EC_UDELAY_GLK, &glk); |
288 | if (ACPI_FAILURE(status)) | |
d550d98d | 289 | return -ENODEV; |
1da177e4 | 290 | } |
451566f4 | 291 | |
5d57a6a5 | 292 | /* Make sure GPE is enabled before doing transaction */ |
a86e2772 | 293 | acpi_enable_gpe(NULL, ec->gpe, ACPI_NOT_ISR); |
5d57a6a5 | 294 | |
703959d4 | 295 | status = acpi_ec_wait(ec, ACPI_EC_EVENT_IBF_0); |
716e084e | 296 | if (status) { |
3576cf61 | 297 | printk(KERN_DEBUG PREFIX "read EC, IB not empty\n"); |
451566f4 | 298 | goto end; |
716e084e | 299 | } |
1da177e4 | 300 | |
d7a76e4c LP |
301 | status = acpi_ec_transaction_unlocked(ec, command, |
302 | wdata, wdata_len, | |
303 | rdata, rdata_len); | |
1da177e4 | 304 | |
d7a76e4c | 305 | end: |
1da177e4 | 306 | |
703959d4 | 307 | if (ec->global_lock) |
1da177e4 | 308 | acpi_release_global_lock(glk); |
523953b4 | 309 | mutex_unlock(&ec->lock); |
1da177e4 | 310 | |
d550d98d | 311 | return status; |
1da177e4 LT |
312 | } |
313 | ||
6ffb221a | 314 | static int acpi_ec_read(struct acpi_ec *ec, u8 address, u8 *data) |
3576cf61 DS |
315 | { |
316 | int result; | |
317 | u8 d; | |
318 | ||
319 | result = acpi_ec_transaction(ec, ACPI_EC_COMMAND_READ, | |
320 | &address, 1, &d, 1); | |
321 | *data = d; | |
322 | return result; | |
323 | } | |
6ffb221a | 324 | |
3576cf61 DS |
325 | static int acpi_ec_write(struct acpi_ec *ec, u8 address, u8 data) |
326 | { | |
327 | u8 wdata[2] = { address, data }; | |
328 | return acpi_ec_transaction(ec, ACPI_EC_COMMAND_WRITE, | |
329 | wdata, 2, NULL, 0); | |
330 | } | |
331 | ||
1da177e4 LT |
332 | /* |
333 | * Externally callable EC access functions. For now, assume 1 EC only | |
334 | */ | |
6ffb221a | 335 | int ec_read(u8 addr, u8 *val) |
1da177e4 | 336 | { |
703959d4 | 337 | struct acpi_ec *ec; |
1da177e4 | 338 | int err; |
6ffb221a | 339 | u8 temp_data; |
1da177e4 LT |
340 | |
341 | if (!first_ec) | |
342 | return -ENODEV; | |
343 | ||
344 | ec = acpi_driver_data(first_ec); | |
345 | ||
346 | err = acpi_ec_read(ec, addr, &temp_data); | |
347 | ||
348 | if (!err) { | |
349 | *val = temp_data; | |
350 | return 0; | |
50526df6 | 351 | } else |
1da177e4 LT |
352 | return err; |
353 | } | |
50526df6 | 354 | |
1da177e4 LT |
355 | EXPORT_SYMBOL(ec_read); |
356 | ||
50526df6 | 357 | int ec_write(u8 addr, u8 val) |
1da177e4 | 358 | { |
703959d4 | 359 | struct acpi_ec *ec; |
1da177e4 LT |
360 | int err; |
361 | ||
362 | if (!first_ec) | |
363 | return -ENODEV; | |
364 | ||
365 | ec = acpi_driver_data(first_ec); | |
366 | ||
367 | err = acpi_ec_write(ec, addr, val); | |
368 | ||
369 | return err; | |
370 | } | |
50526df6 | 371 | |
1da177e4 LT |
372 | EXPORT_SYMBOL(ec_write); |
373 | ||
d7a76e4c LP |
374 | extern int ec_transaction(u8 command, |
375 | const u8 *wdata, unsigned wdata_len, | |
376 | u8 *rdata, unsigned rdata_len) | |
45bea155 | 377 | { |
703959d4 | 378 | struct acpi_ec *ec; |
45bea155 | 379 | |
d7a76e4c LP |
380 | if (!first_ec) |
381 | return -ENODEV; | |
45bea155 | 382 | |
d7a76e4c | 383 | ec = acpi_driver_data(first_ec); |
45bea155 | 384 | |
3576cf61 DS |
385 | return acpi_ec_transaction(ec, command, wdata, |
386 | wdata_len, rdata, rdata_len); | |
45bea155 | 387 | } |
1da177e4 | 388 | |
ab9e43c6 LP |
389 | EXPORT_SYMBOL(ec_transaction); |
390 | ||
6ffb221a | 391 | static int acpi_ec_query(struct acpi_ec *ec, u8 *data) |
3576cf61 DS |
392 | { |
393 | int result; | |
d7a76e4c | 394 | u8 d; |
1da177e4 | 395 | |
d7a76e4c LP |
396 | if (!ec || !data) |
397 | return -EINVAL; | |
1da177e4 | 398 | |
d7a76e4c LP |
399 | /* |
400 | * Query the EC to find out which _Qxx method we need to evaluate. | |
401 | * Note that successful completion of the query causes the ACPI_EC_SCI | |
402 | * bit to be cleared (and thus clearing the interrupt source). | |
403 | */ | |
716e084e | 404 | |
d7a76e4c LP |
405 | result = acpi_ec_transaction(ec, ACPI_EC_COMMAND_QUERY, NULL, 0, &d, 1); |
406 | if (result) | |
407 | return result; | |
1da177e4 | 408 | |
d7a76e4c LP |
409 | if (!d) |
410 | return -ENODATA; | |
1da177e4 | 411 | |
d7a76e4c LP |
412 | *data = d; |
413 | return 0; | |
1da177e4 LT |
414 | } |
415 | ||
1da177e4 LT |
416 | /* -------------------------------------------------------------------------- |
417 | Event Management | |
418 | -------------------------------------------------------------------------- */ | |
419 | ||
50526df6 | 420 | static void acpi_ec_gpe_query(void *ec_cxt) |
45bea155 | 421 | { |
703959d4 | 422 | struct acpi_ec *ec = (struct acpi_ec *)ec_cxt; |
6ffb221a | 423 | u8 value = 0; |
5d0c288b | 424 | char object_name[8]; |
45bea155 | 425 | |
5d0c288b | 426 | if (!ec || acpi_ec_query(ec, &value)) |
e41334c0 | 427 | return; |
45bea155 | 428 | |
6ffb221a | 429 | snprintf(object_name, 8, "_Q%2.2X", value); |
45bea155 | 430 | |
af3fd140 | 431 | printk(KERN_INFO PREFIX "evaluating %s\n", object_name); |
45bea155 | 432 | |
703959d4 | 433 | acpi_evaluate_object(ec->handle, object_name, NULL, NULL); |
45bea155 | 434 | } |
1da177e4 | 435 | |
50526df6 | 436 | static u32 acpi_ec_gpe_handler(void *data) |
1da177e4 | 437 | { |
50526df6 | 438 | acpi_status status = AE_OK; |
6ffb221a | 439 | u8 value; |
703959d4 | 440 | struct acpi_ec *ec = (struct acpi_ec *)data; |
1da177e4 | 441 | |
1da177e4 | 442 | |
8e0341ba | 443 | if (acpi_ec_mode == EC_INTR) { |
af3fd140 | 444 | wake_up(&ec->wait); |
451566f4 DT |
445 | } |
446 | ||
bec5a1e0 | 447 | value = acpi_ec_read_status(ec); |
5d0c288b AS |
448 | if ((value & ACPI_EC_FLAG_SCI) && !atomic_read(&ec->query_pending)) { |
449 | atomic_set(&ec->query_pending, 1); | |
6ffb221a | 450 | status = acpi_os_execute(OSL_EC_BURST_HANDLER, acpi_ec_gpe_query, ec); |
50526df6 | 451 | } |
e41334c0 | 452 | |
451566f4 | 453 | return status == AE_OK ? |
50526df6 | 454 | ACPI_INTERRUPT_HANDLED : ACPI_INTERRUPT_NOT_HANDLED; |
1da177e4 LT |
455 | } |
456 | ||
457 | /* -------------------------------------------------------------------------- | |
458 | Address Space Management | |
459 | -------------------------------------------------------------------------- */ | |
460 | ||
461 | static acpi_status | |
50526df6 LB |
462 | acpi_ec_space_setup(acpi_handle region_handle, |
463 | u32 function, void *handler_context, void **return_context) | |
1da177e4 LT |
464 | { |
465 | /* | |
466 | * The EC object is in the handler context and is needed | |
467 | * when calling the acpi_ec_space_handler. | |
468 | */ | |
50526df6 LB |
469 | *return_context = (function != ACPI_REGION_DEACTIVATE) ? |
470 | handler_context : NULL; | |
1da177e4 LT |
471 | |
472 | return AE_OK; | |
473 | } | |
474 | ||
1da177e4 | 475 | static acpi_status |
50526df6 LB |
476 | acpi_ec_space_handler(u32 function, |
477 | acpi_physical_address address, | |
478 | u32 bit_width, | |
479 | acpi_integer * value, | |
480 | void *handler_context, void *region_context) | |
1da177e4 | 481 | { |
50526df6 | 482 | int result = 0; |
703959d4 | 483 | struct acpi_ec *ec = NULL; |
50526df6 LB |
484 | u64 temp = *value; |
485 | acpi_integer f_v = 0; | |
486 | int i = 0; | |
1da177e4 | 487 | |
1da177e4 LT |
488 | |
489 | if ((address > 0xFF) || !value || !handler_context) | |
d550d98d | 490 | return AE_BAD_PARAMETER; |
1da177e4 | 491 | |
fa9cd547 | 492 | if (bit_width != 8 && acpi_strict) { |
d550d98d | 493 | return AE_BAD_PARAMETER; |
1da177e4 LT |
494 | } |
495 | ||
703959d4 | 496 | ec = (struct acpi_ec *)handler_context; |
1da177e4 | 497 | |
50526df6 | 498 | next_byte: |
1da177e4 LT |
499 | switch (function) { |
500 | case ACPI_READ: | |
fa9cd547 | 501 | temp = 0; |
6ffb221a | 502 | result = acpi_ec_read(ec, (u8) address, (u8 *) &temp); |
1da177e4 LT |
503 | break; |
504 | case ACPI_WRITE: | |
fa9cd547 | 505 | result = acpi_ec_write(ec, (u8) address, (u8) temp); |
1da177e4 LT |
506 | break; |
507 | default: | |
508 | result = -EINVAL; | |
509 | goto out; | |
510 | break; | |
511 | } | |
512 | ||
513 | bit_width -= 8; | |
fa9cd547 LY |
514 | if (bit_width) { |
515 | if (function == ACPI_READ) | |
516 | f_v |= temp << 8 * i; | |
517 | if (function == ACPI_WRITE) | |
518 | temp >>= 8; | |
1da177e4 | 519 | i++; |
83ea7445 | 520 | address++; |
1da177e4 LT |
521 | goto next_byte; |
522 | } | |
523 | ||
fa9cd547 LY |
524 | if (function == ACPI_READ) { |
525 | f_v |= temp << 8 * i; | |
1da177e4 LT |
526 | *value = f_v; |
527 | } | |
528 | ||
50526df6 | 529 | out: |
1da177e4 LT |
530 | switch (result) { |
531 | case -EINVAL: | |
d550d98d | 532 | return AE_BAD_PARAMETER; |
1da177e4 LT |
533 | break; |
534 | case -ENODEV: | |
d550d98d | 535 | return AE_NOT_FOUND; |
1da177e4 LT |
536 | break; |
537 | case -ETIME: | |
d550d98d | 538 | return AE_TIME; |
1da177e4 LT |
539 | break; |
540 | default: | |
d550d98d | 541 | return AE_OK; |
1da177e4 | 542 | } |
1da177e4 LT |
543 | } |
544 | ||
1da177e4 LT |
545 | /* -------------------------------------------------------------------------- |
546 | FS Interface (/proc) | |
547 | -------------------------------------------------------------------------- */ | |
548 | ||
50526df6 | 549 | static struct proc_dir_entry *acpi_ec_dir; |
1da177e4 | 550 | |
50526df6 | 551 | static int acpi_ec_read_info(struct seq_file *seq, void *offset) |
1da177e4 | 552 | { |
703959d4 | 553 | struct acpi_ec *ec = (struct acpi_ec *)seq->private; |
1da177e4 | 554 | |
1da177e4 LT |
555 | |
556 | if (!ec) | |
557 | goto end; | |
558 | ||
a86e2772 AS |
559 | seq_printf(seq, "gpe: 0x%02x\n", |
560 | (u32) ec->gpe); | |
1da177e4 | 561 | seq_printf(seq, "ports: 0x%02x, 0x%02x\n", |
6ffb221a DS |
562 | (u32) ec->command_addr, |
563 | (u32) ec->data_addr); | |
1da177e4 | 564 | seq_printf(seq, "use global lock: %s\n", |
703959d4 | 565 | ec->global_lock ? "yes" : "no"); |
a86e2772 | 566 | acpi_enable_gpe(NULL, ec->gpe, ACPI_NOT_ISR); |
1da177e4 | 567 | |
50526df6 | 568 | end: |
d550d98d | 569 | return 0; |
1da177e4 LT |
570 | } |
571 | ||
572 | static int acpi_ec_info_open_fs(struct inode *inode, struct file *file) | |
573 | { | |
574 | return single_open(file, acpi_ec_read_info, PDE(inode)->data); | |
575 | } | |
576 | ||
703959d4 | 577 | static struct file_operations acpi_ec_info_ops = { |
50526df6 LB |
578 | .open = acpi_ec_info_open_fs, |
579 | .read = seq_read, | |
580 | .llseek = seq_lseek, | |
581 | .release = single_release, | |
1da177e4 LT |
582 | .owner = THIS_MODULE, |
583 | }; | |
584 | ||
50526df6 | 585 | static int acpi_ec_add_fs(struct acpi_device *device) |
1da177e4 | 586 | { |
50526df6 | 587 | struct proc_dir_entry *entry = NULL; |
1da177e4 | 588 | |
1da177e4 LT |
589 | |
590 | if (!acpi_device_dir(device)) { | |
591 | acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device), | |
50526df6 | 592 | acpi_ec_dir); |
1da177e4 | 593 | if (!acpi_device_dir(device)) |
d550d98d | 594 | return -ENODEV; |
1da177e4 LT |
595 | } |
596 | ||
597 | entry = create_proc_entry(ACPI_EC_FILE_INFO, S_IRUGO, | |
50526df6 | 598 | acpi_device_dir(device)); |
1da177e4 | 599 | if (!entry) |
d550d98d | 600 | return -ENODEV; |
1da177e4 LT |
601 | else { |
602 | entry->proc_fops = &acpi_ec_info_ops; | |
603 | entry->data = acpi_driver_data(device); | |
604 | entry->owner = THIS_MODULE; | |
605 | } | |
606 | ||
d550d98d | 607 | return 0; |
1da177e4 LT |
608 | } |
609 | ||
50526df6 | 610 | static int acpi_ec_remove_fs(struct acpi_device *device) |
1da177e4 | 611 | { |
1da177e4 LT |
612 | |
613 | if (acpi_device_dir(device)) { | |
614 | remove_proc_entry(ACPI_EC_FILE_INFO, acpi_device_dir(device)); | |
615 | remove_proc_entry(acpi_device_bid(device), acpi_ec_dir); | |
616 | acpi_device_dir(device) = NULL; | |
617 | } | |
618 | ||
d550d98d | 619 | return 0; |
1da177e4 LT |
620 | } |
621 | ||
1da177e4 LT |
622 | /* -------------------------------------------------------------------------- |
623 | Driver Interface | |
624 | -------------------------------------------------------------------------- */ | |
625 | ||
703959d4 | 626 | static int acpi_ec_add(struct acpi_device *device) |
1da177e4 | 627 | { |
50526df6 LB |
628 | int result = 0; |
629 | acpi_status status = AE_OK; | |
703959d4 | 630 | struct acpi_ec *ec = NULL; |
45bea155 | 631 | |
45bea155 LY |
632 | |
633 | if (!device) | |
d550d98d | 634 | return -EINVAL; |
45bea155 | 635 | |
703959d4 | 636 | ec = kmalloc(sizeof(struct acpi_ec), GFP_KERNEL); |
45bea155 | 637 | if (!ec) |
d550d98d | 638 | return -ENOMEM; |
703959d4 DS |
639 | memset(ec, 0, sizeof(struct acpi_ec)); |
640 | ||
641 | ec->handle = device->handle; | |
642 | ec->uid = -1; | |
c787a855 | 643 | mutex_init(&ec->lock); |
5d0c288b | 644 | atomic_set(&ec->query_pending, 0); |
703959d4 DS |
645 | if (acpi_ec_mode == EC_INTR) { |
646 | atomic_set(&ec->leaving_burst, 1); | |
647 | init_waitqueue_head(&ec->wait); | |
45bea155 | 648 | } |
1da177e4 LT |
649 | strcpy(acpi_device_name(device), ACPI_EC_DEVICE_NAME); |
650 | strcpy(acpi_device_class(device), ACPI_EC_CLASS); | |
651 | acpi_driver_data(device) = ec; | |
652 | ||
653 | /* Use the global lock for all EC transactions? */ | |
703959d4 DS |
654 | acpi_evaluate_integer(ec->handle, "_GLK", NULL, |
655 | &ec->global_lock); | |
1da177e4 | 656 | |
ff2fc3e9 JS |
657 | /* XXX we don't test uids, because on some boxes ecdt uid = 0, see: |
658 | http://bugzilla.kernel.org/show_bug.cgi?id=6111 */ | |
659 | if (ec_ecdt) { | |
1da177e4 | 660 | acpi_remove_address_space_handler(ACPI_ROOT_OBJECT, |
50526df6 LB |
661 | ACPI_ADR_SPACE_EC, |
662 | &acpi_ec_space_handler); | |
451566f4 | 663 | |
a86e2772 | 664 | acpi_remove_gpe_handler(NULL, ec_ecdt->gpe, |
50526df6 | 665 | &acpi_ec_gpe_handler); |
1da177e4 LT |
666 | |
667 | kfree(ec_ecdt); | |
668 | } | |
669 | ||
670 | /* Get GPE bit assignment (EC events). */ | |
671 | /* TODO: Add support for _GPE returning a package */ | |
50526df6 | 672 | status = |
703959d4 | 673 | acpi_evaluate_integer(ec->handle, "_GPE", NULL, |
a86e2772 | 674 | &ec->gpe); |
1da177e4 | 675 | if (ACPI_FAILURE(status)) { |
703959d4 | 676 | ACPI_EXCEPTION((AE_INFO, status, "Obtaining GPE bit assignment")); |
1da177e4 LT |
677 | result = -ENODEV; |
678 | goto end; | |
679 | } | |
680 | ||
681 | result = acpi_ec_add_fs(device); | |
682 | if (result) | |
683 | goto end; | |
684 | ||
703959d4 | 685 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "%s [%s] (gpe %d) interrupt mode.", |
50526df6 | 686 | acpi_device_name(device), acpi_device_bid(device), |
a86e2772 | 687 | (u32) ec->gpe)); |
1da177e4 LT |
688 | |
689 | if (!first_ec) | |
690 | first_ec = device; | |
691 | ||
703959d4 | 692 | end: |
1da177e4 LT |
693 | if (result) |
694 | kfree(ec); | |
695 | ||
d550d98d | 696 | return result; |
1da177e4 LT |
697 | } |
698 | ||
50526df6 | 699 | static int acpi_ec_remove(struct acpi_device *device, int type) |
1da177e4 | 700 | { |
703959d4 | 701 | struct acpi_ec *ec = NULL; |
1da177e4 | 702 | |
1da177e4 LT |
703 | |
704 | if (!device) | |
d550d98d | 705 | return -EINVAL; |
1da177e4 LT |
706 | |
707 | ec = acpi_driver_data(device); | |
708 | ||
709 | acpi_ec_remove_fs(device); | |
710 | ||
711 | kfree(ec); | |
712 | ||
d550d98d | 713 | return 0; |
1da177e4 LT |
714 | } |
715 | ||
1da177e4 | 716 | static acpi_status |
50526df6 | 717 | acpi_ec_io_ports(struct acpi_resource *resource, void *context) |
1da177e4 | 718 | { |
703959d4 | 719 | struct acpi_ec *ec = (struct acpi_ec *)context; |
1da177e4 | 720 | |
50eca3eb | 721 | if (resource->type != ACPI_RESOURCE_TYPE_IO) { |
1da177e4 LT |
722 | return AE_OK; |
723 | } | |
724 | ||
725 | /* | |
726 | * The first address region returned is the data port, and | |
727 | * the second address region returned is the status/command | |
728 | * port. | |
729 | */ | |
6ffb221a DS |
730 | if (ec->data_addr == 0) { |
731 | ec->data_addr = resource->data.io.minimum; | |
732 | } else if (ec->command_addr == 0) { | |
733 | ec->command_addr = resource->data.io.minimum; | |
1da177e4 LT |
734 | } else { |
735 | return AE_CTRL_TERMINATE; | |
736 | } | |
737 | ||
1da177e4 LT |
738 | return AE_OK; |
739 | } | |
740 | ||
50526df6 | 741 | static int acpi_ec_start(struct acpi_device *device) |
1da177e4 | 742 | { |
50526df6 | 743 | acpi_status status = AE_OK; |
703959d4 | 744 | struct acpi_ec *ec = NULL; |
1da177e4 | 745 | |
1da177e4 LT |
746 | |
747 | if (!device) | |
d550d98d | 748 | return -EINVAL; |
1da177e4 LT |
749 | |
750 | ec = acpi_driver_data(device); | |
751 | ||
752 | if (!ec) | |
d550d98d | 753 | return -EINVAL; |
1da177e4 LT |
754 | |
755 | /* | |
756 | * Get I/O port addresses. Convert to GAS format. | |
757 | */ | |
703959d4 | 758 | status = acpi_walk_resources(ec->handle, METHOD_NAME__CRS, |
50526df6 | 759 | acpi_ec_io_ports, ec); |
6ffb221a | 760 | if (ACPI_FAILURE(status) || ec->command_addr == 0) { |
703959d4 DS |
761 | ACPI_EXCEPTION((AE_INFO, status, |
762 | "Error getting I/O port addresses")); | |
d550d98d | 763 | return -ENODEV; |
1da177e4 LT |
764 | } |
765 | ||
6ffb221a | 766 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "gpe=0x%02lx, ports=0x%2lx,0x%2lx", |
a86e2772 | 767 | ec->gpe, ec->command_addr, ec->data_addr)); |
1da177e4 LT |
768 | |
769 | /* | |
770 | * Install GPE handler | |
771 | */ | |
a86e2772 | 772 | status = acpi_install_gpe_handler(NULL, ec->gpe, |
50526df6 LB |
773 | ACPI_GPE_EDGE_TRIGGERED, |
774 | &acpi_ec_gpe_handler, ec); | |
1da177e4 | 775 | if (ACPI_FAILURE(status)) { |
d550d98d | 776 | return -ENODEV; |
1da177e4 | 777 | } |
a86e2772 AS |
778 | acpi_set_gpe_type(NULL, ec->gpe, ACPI_GPE_TYPE_RUNTIME); |
779 | acpi_enable_gpe(NULL, ec->gpe, ACPI_NOT_ISR); | |
1da177e4 | 780 | |
703959d4 | 781 | status = acpi_install_address_space_handler(ec->handle, |
50526df6 LB |
782 | ACPI_ADR_SPACE_EC, |
783 | &acpi_ec_space_handler, | |
784 | &acpi_ec_space_setup, ec); | |
1da177e4 | 785 | if (ACPI_FAILURE(status)) { |
a86e2772 | 786 | acpi_remove_gpe_handler(NULL, ec->gpe, |
50526df6 | 787 | &acpi_ec_gpe_handler); |
d550d98d | 788 | return -ENODEV; |
1da177e4 LT |
789 | } |
790 | ||
d550d98d | 791 | return AE_OK; |
1da177e4 LT |
792 | } |
793 | ||
50526df6 | 794 | static int acpi_ec_stop(struct acpi_device *device, int type) |
1da177e4 | 795 | { |
50526df6 | 796 | acpi_status status = AE_OK; |
703959d4 | 797 | struct acpi_ec *ec = NULL; |
1da177e4 | 798 | |
1da177e4 LT |
799 | |
800 | if (!device) | |
d550d98d | 801 | return -EINVAL; |
1da177e4 LT |
802 | |
803 | ec = acpi_driver_data(device); | |
804 | ||
703959d4 | 805 | status = acpi_remove_address_space_handler(ec->handle, |
50526df6 LB |
806 | ACPI_ADR_SPACE_EC, |
807 | &acpi_ec_space_handler); | |
1da177e4 | 808 | if (ACPI_FAILURE(status)) |
d550d98d | 809 | return -ENODEV; |
1da177e4 | 810 | |
50526df6 | 811 | status = |
a86e2772 | 812 | acpi_remove_gpe_handler(NULL, ec->gpe, |
50526df6 | 813 | &acpi_ec_gpe_handler); |
1da177e4 | 814 | if (ACPI_FAILURE(status)) |
d550d98d | 815 | return -ENODEV; |
1da177e4 | 816 | |
d550d98d | 817 | return 0; |
1da177e4 LT |
818 | } |
819 | ||
820 | static acpi_status __init | |
50526df6 LB |
821 | acpi_fake_ecdt_callback(acpi_handle handle, |
822 | u32 Level, void *context, void **retval) | |
1da177e4 | 823 | { |
50526df6 | 824 | acpi_status status; |
1da177e4 | 825 | |
c787a855 | 826 | mutex_init(&ec_ecdt->lock); |
703959d4 DS |
827 | if (acpi_ec_mode == EC_INTR) { |
828 | init_waitqueue_head(&ec_ecdt->wait); | |
829 | } | |
1da177e4 | 830 | status = acpi_walk_resources(handle, METHOD_NAME__CRS, |
50526df6 | 831 | acpi_ec_io_ports, ec_ecdt); |
1da177e4 LT |
832 | if (ACPI_FAILURE(status)) |
833 | return status; | |
1da177e4 | 834 | |
703959d4 DS |
835 | ec_ecdt->uid = -1; |
836 | acpi_evaluate_integer(handle, "_UID", NULL, &ec_ecdt->uid); | |
1da177e4 | 837 | |
50526df6 LB |
838 | status = |
839 | acpi_evaluate_integer(handle, "_GPE", NULL, | |
a86e2772 | 840 | &ec_ecdt->gpe); |
1da177e4 LT |
841 | if (ACPI_FAILURE(status)) |
842 | return status; | |
703959d4 DS |
843 | ec_ecdt->global_lock = TRUE; |
844 | ec_ecdt->handle = handle; | |
1da177e4 | 845 | |
6ffb221a | 846 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "GPE=0x%02lx, ports=0x%2lx, 0x%2lx", |
a86e2772 | 847 | ec_ecdt->gpe, ec_ecdt->command_addr, ec_ecdt->data_addr)); |
1da177e4 LT |
848 | |
849 | return AE_CTRL_TERMINATE; | |
850 | } | |
851 | ||
852 | /* | |
853 | * Some BIOS (such as some from Gateway laptops) access EC region very early | |
854 | * such as in BAT0._INI or EC._INI before an EC device is found and | |
855 | * do not provide an ECDT. According to ACPI spec, ECDT isn't mandatorily | |
856 | * required, but if EC regison is accessed early, it is required. | |
857 | * The routine tries to workaround the BIOS bug by pre-scan EC device | |
858 | * It assumes that _CRS, _HID, _GPE, _UID methods of EC don't touch any | |
859 | * op region (since _REG isn't invoked yet). The assumption is true for | |
860 | * all systems found. | |
861 | */ | |
50526df6 | 862 | static int __init acpi_ec_fake_ecdt(void) |
1da177e4 | 863 | { |
50526df6 LB |
864 | acpi_status status; |
865 | int ret = 0; | |
1da177e4 | 866 | |
703959d4 | 867 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Try to make an fake ECDT")); |
1da177e4 | 868 | |
703959d4 | 869 | ec_ecdt = kmalloc(sizeof(struct acpi_ec), GFP_KERNEL); |
1da177e4 LT |
870 | if (!ec_ecdt) { |
871 | ret = -ENOMEM; | |
872 | goto error; | |
873 | } | |
703959d4 | 874 | memset(ec_ecdt, 0, sizeof(struct acpi_ec)); |
1da177e4 | 875 | |
50526df6 LB |
876 | status = acpi_get_devices(ACPI_EC_HID, |
877 | acpi_fake_ecdt_callback, NULL, NULL); | |
1da177e4 LT |
878 | if (ACPI_FAILURE(status)) { |
879 | kfree(ec_ecdt); | |
880 | ec_ecdt = NULL; | |
881 | ret = -ENODEV; | |
703959d4 | 882 | ACPI_EXCEPTION((AE_INFO, status, "Can't make an fake ECDT")); |
1da177e4 LT |
883 | goto error; |
884 | } | |
885 | return 0; | |
703959d4 | 886 | error: |
1da177e4 LT |
887 | return ret; |
888 | } | |
889 | ||
50526df6 | 890 | static int __init acpi_ec_get_real_ecdt(void) |
45bea155 | 891 | { |
50526df6 LB |
892 | acpi_status status; |
893 | struct acpi_table_ecdt *ecdt_ptr; | |
45bea155 | 894 | |
50526df6 LB |
895 | status = acpi_get_firmware_table("ECDT", 1, ACPI_LOGICAL_ADDRESSING, |
896 | (struct acpi_table_header **) | |
897 | &ecdt_ptr); | |
45bea155 LY |
898 | if (ACPI_FAILURE(status)) |
899 | return -ENODEV; | |
900 | ||
703959d4 | 901 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found ECDT")); |
45bea155 LY |
902 | |
903 | /* | |
904 | * Generate a temporary ec context to use until the namespace is scanned | |
905 | */ | |
703959d4 | 906 | ec_ecdt = kmalloc(sizeof(struct acpi_ec), GFP_KERNEL); |
45bea155 LY |
907 | if (!ec_ecdt) |
908 | return -ENOMEM; | |
703959d4 | 909 | memset(ec_ecdt, 0, sizeof(struct acpi_ec)); |
45bea155 | 910 | |
c787a855 | 911 | mutex_init(&ec_ecdt->lock); |
703959d4 DS |
912 | if (acpi_ec_mode == EC_INTR) { |
913 | init_waitqueue_head(&ec_ecdt->wait); | |
45bea155 | 914 | } |
6ffb221a DS |
915 | ec_ecdt->command_addr = ecdt_ptr->ec_control.address; |
916 | ec_ecdt->data_addr = ecdt_ptr->ec_data.address; | |
a86e2772 | 917 | ec_ecdt->gpe = ecdt_ptr->gpe_bit; |
1da177e4 | 918 | /* use the GL just to be safe */ |
703959d4 DS |
919 | ec_ecdt->global_lock = TRUE; |
920 | ec_ecdt->uid = ecdt_ptr->uid; | |
1da177e4 | 921 | |
50526df6 | 922 | status = |
703959d4 | 923 | acpi_get_handle(NULL, ecdt_ptr->ec_id, &ec_ecdt->handle); |
1da177e4 LT |
924 | if (ACPI_FAILURE(status)) { |
925 | goto error; | |
926 | } | |
927 | ||
928 | return 0; | |
703959d4 DS |
929 | error: |
930 | ACPI_EXCEPTION((AE_INFO, status, "Could not use ECDT")); | |
1da177e4 LT |
931 | kfree(ec_ecdt); |
932 | ec_ecdt = NULL; | |
933 | ||
934 | return -ENODEV; | |
935 | } | |
936 | ||
937 | static int __initdata acpi_fake_ecdt_enabled; | |
50526df6 | 938 | int __init acpi_ec_ecdt_probe(void) |
1da177e4 | 939 | { |
50526df6 LB |
940 | acpi_status status; |
941 | int ret; | |
1da177e4 LT |
942 | |
943 | ret = acpi_ec_get_real_ecdt(); | |
944 | /* Try to make a fake ECDT */ | |
945 | if (ret && acpi_fake_ecdt_enabled) { | |
946 | ret = acpi_ec_fake_ecdt(); | |
947 | } | |
948 | ||
949 | if (ret) | |
950 | return 0; | |
951 | ||
952 | /* | |
953 | * Install GPE handler | |
954 | */ | |
a86e2772 | 955 | status = acpi_install_gpe_handler(NULL, ec_ecdt->gpe, |
50526df6 LB |
956 | ACPI_GPE_EDGE_TRIGGERED, |
957 | &acpi_ec_gpe_handler, ec_ecdt); | |
1da177e4 LT |
958 | if (ACPI_FAILURE(status)) { |
959 | goto error; | |
960 | } | |
a86e2772 AS |
961 | acpi_set_gpe_type(NULL, ec_ecdt->gpe, ACPI_GPE_TYPE_RUNTIME); |
962 | acpi_enable_gpe(NULL, ec_ecdt->gpe, ACPI_NOT_ISR); | |
50526df6 LB |
963 | |
964 | status = acpi_install_address_space_handler(ACPI_ROOT_OBJECT, | |
965 | ACPI_ADR_SPACE_EC, | |
966 | &acpi_ec_space_handler, | |
967 | &acpi_ec_space_setup, | |
968 | ec_ecdt); | |
1da177e4 | 969 | if (ACPI_FAILURE(status)) { |
a86e2772 | 970 | acpi_remove_gpe_handler(NULL, ec_ecdt->gpe, |
50526df6 | 971 | &acpi_ec_gpe_handler); |
1da177e4 LT |
972 | goto error; |
973 | } | |
974 | ||
975 | return 0; | |
976 | ||
50526df6 | 977 | error: |
703959d4 | 978 | ACPI_EXCEPTION((AE_INFO, status, "Could not use ECDT")); |
1da177e4 LT |
979 | kfree(ec_ecdt); |
980 | ec_ecdt = NULL; | |
981 | ||
982 | return -ENODEV; | |
983 | } | |
984 | ||
50526df6 | 985 | static int __init acpi_ec_init(void) |
1da177e4 | 986 | { |
50526df6 | 987 | int result = 0; |
1da177e4 | 988 | |
1da177e4 LT |
989 | |
990 | if (acpi_disabled) | |
d550d98d | 991 | return 0; |
1da177e4 LT |
992 | |
993 | acpi_ec_dir = proc_mkdir(ACPI_EC_CLASS, acpi_root_dir); | |
994 | if (!acpi_ec_dir) | |
d550d98d | 995 | return -ENODEV; |
1da177e4 LT |
996 | |
997 | /* Now register the driver for the EC */ | |
998 | result = acpi_bus_register_driver(&acpi_ec_driver); | |
999 | if (result < 0) { | |
1000 | remove_proc_entry(ACPI_EC_CLASS, acpi_root_dir); | |
d550d98d | 1001 | return -ENODEV; |
1da177e4 LT |
1002 | } |
1003 | ||
d550d98d | 1004 | return result; |
1da177e4 LT |
1005 | } |
1006 | ||
1007 | subsys_initcall(acpi_ec_init); | |
1008 | ||
1009 | /* EC driver currently not unloadable */ | |
1010 | #if 0 | |
50526df6 | 1011 | static void __exit acpi_ec_exit(void) |
1da177e4 | 1012 | { |
1da177e4 LT |
1013 | |
1014 | acpi_bus_unregister_driver(&acpi_ec_driver); | |
1015 | ||
1016 | remove_proc_entry(ACPI_EC_CLASS, acpi_root_dir); | |
1017 | ||
d550d98d | 1018 | return; |
1da177e4 | 1019 | } |
50526df6 | 1020 | #endif /* 0 */ |
1da177e4 LT |
1021 | |
1022 | static int __init acpi_fake_ecdt_setup(char *str) | |
1023 | { | |
1024 | acpi_fake_ecdt_enabled = 1; | |
9b41046c | 1025 | return 1; |
1da177e4 | 1026 | } |
7b15f5e7 | 1027 | |
1da177e4 | 1028 | __setup("acpi_fake_ecdt", acpi_fake_ecdt_setup); |
02b28a33 | 1029 | static int __init acpi_ec_set_intr_mode(char *str) |
45bea155 | 1030 | { |
02b28a33 | 1031 | int intr; |
7b15f5e7 | 1032 | |
02b28a33 | 1033 | if (!get_option(&str, &intr)) |
7b15f5e7 LY |
1034 | return 0; |
1035 | ||
02b28a33 | 1036 | if (intr) { |
703959d4 | 1037 | acpi_ec_mode = EC_INTR; |
7b15f5e7 | 1038 | } else { |
703959d4 | 1039 | acpi_ec_mode = EC_POLL; |
7b15f5e7 | 1040 | } |
703959d4 DS |
1041 | acpi_ec_driver.ops.add = acpi_ec_add; |
1042 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "EC %s mode.\n", intr ? "interrupt" : "polling")); | |
1043 | ||
9b41046c | 1044 | return 1; |
45bea155 | 1045 | } |
50526df6 | 1046 | |
53f11d4f | 1047 | __setup("ec_intr=", acpi_ec_set_intr_mode); |