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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" | |
1da177e4 LT |
48 | #define ACPI_EC_FLAG_OBF 0x01 /* Output buffer full */ |
49 | #define ACPI_EC_FLAG_IBF 0x02 /* Input buffer full */ | |
451566f4 | 50 | #define ACPI_EC_FLAG_BURST 0x10 /* burst mode */ |
1da177e4 | 51 | #define ACPI_EC_FLAG_SCI 0x20 /* EC-SCI occurred */ |
1da177e4 LT |
52 | #define ACPI_EC_EVENT_OBF 0x01 /* Output buffer full */ |
53 | #define ACPI_EC_EVENT_IBE 0x02 /* Input buffer empty */ | |
451566f4 | 54 | #define ACPI_EC_DELAY 50 /* Wait 50ms max. during EC ops */ |
1da177e4 | 55 | #define ACPI_EC_UDELAY_GLK 1000 /* Wait 1ms max. to get global lock */ |
50526df6 LB |
56 | #define ACPI_EC_UDELAY 100 /* Poll @ 100us increments */ |
57 | #define ACPI_EC_UDELAY_COUNT 1000 /* Wait 10ms max. during EC ops */ | |
1da177e4 LT |
58 | #define ACPI_EC_COMMAND_READ 0x80 |
59 | #define ACPI_EC_COMMAND_WRITE 0x81 | |
451566f4 DT |
60 | #define ACPI_EC_BURST_ENABLE 0x82 |
61 | #define ACPI_EC_BURST_DISABLE 0x83 | |
1da177e4 | 62 | #define ACPI_EC_COMMAND_QUERY 0x84 |
02b28a33 LB |
63 | #define EC_POLL 0xFF |
64 | #define EC_INTR 0x00 | |
50526df6 LB |
65 | static int acpi_ec_remove(struct acpi_device *device, int type); |
66 | static int acpi_ec_start(struct acpi_device *device); | |
67 | static int acpi_ec_stop(struct acpi_device *device, int type); | |
02b28a33 LB |
68 | static int acpi_ec_intr_add(struct acpi_device *device); |
69 | static int acpi_ec_poll_add(struct acpi_device *device); | |
1da177e4 LT |
70 | |
71 | static struct acpi_driver acpi_ec_driver = { | |
50526df6 LB |
72 | .name = ACPI_EC_DRIVER_NAME, |
73 | .class = ACPI_EC_CLASS, | |
74 | .ids = ACPI_EC_HID, | |
75 | .ops = { | |
53f11d4f | 76 | .add = acpi_ec_intr_add, |
50526df6 LB |
77 | .remove = acpi_ec_remove, |
78 | .start = acpi_ec_start, | |
79 | .stop = acpi_ec_stop, | |
80 | }, | |
1da177e4 | 81 | }; |
45bea155 LY |
82 | union acpi_ec { |
83 | struct { | |
50526df6 LB |
84 | u32 mode; |
85 | acpi_handle handle; | |
86 | unsigned long uid; | |
87 | unsigned long gpe_bit; | |
88 | struct acpi_generic_address status_addr; | |
89 | struct acpi_generic_address command_addr; | |
90 | struct acpi_generic_address data_addr; | |
91 | unsigned long global_lock; | |
45bea155 LY |
92 | } common; |
93 | ||
94 | struct { | |
50526df6 LB |
95 | u32 mode; |
96 | acpi_handle handle; | |
97 | unsigned long uid; | |
98 | unsigned long gpe_bit; | |
99 | struct acpi_generic_address status_addr; | |
100 | struct acpi_generic_address command_addr; | |
101 | struct acpi_generic_address data_addr; | |
102 | unsigned long global_lock; | |
103 | unsigned int expect_event; | |
104 | atomic_t leaving_burst; /* 0 : No, 1 : Yes, 2: abort */ | |
105 | atomic_t pending_gpe; | |
106 | struct semaphore sem; | |
107 | wait_queue_head_t wait; | |
02b28a33 | 108 | } intr; |
45bea155 LY |
109 | |
110 | struct { | |
50526df6 LB |
111 | u32 mode; |
112 | acpi_handle handle; | |
113 | unsigned long uid; | |
114 | unsigned long gpe_bit; | |
115 | struct acpi_generic_address status_addr; | |
116 | struct acpi_generic_address command_addr; | |
117 | struct acpi_generic_address data_addr; | |
118 | unsigned long global_lock; | |
f9a6ee1a | 119 | struct semaphore sem; |
02b28a33 | 120 | } poll; |
1da177e4 LT |
121 | }; |
122 | ||
02b28a33 LB |
123 | static int acpi_ec_poll_wait(union acpi_ec *ec, u8 event); |
124 | static int acpi_ec_intr_wait(union acpi_ec *ec, unsigned int event); | |
125 | static int acpi_ec_poll_read(union acpi_ec *ec, u8 address, u32 * data); | |
126 | static int acpi_ec_intr_read(union acpi_ec *ec, u8 address, u32 * data); | |
127 | static int acpi_ec_poll_write(union acpi_ec *ec, u8 address, u8 data); | |
128 | static int acpi_ec_intr_write(union acpi_ec *ec, u8 address, u8 data); | |
129 | static int acpi_ec_poll_query(union acpi_ec *ec, u32 * data); | |
130 | static int acpi_ec_intr_query(union acpi_ec *ec, u32 * data); | |
131 | static void acpi_ec_gpe_poll_query(void *ec_cxt); | |
132 | static void acpi_ec_gpe_intr_query(void *ec_cxt); | |
133 | static u32 acpi_ec_gpe_poll_handler(void *data); | |
134 | static u32 acpi_ec_gpe_intr_handler(void *data); | |
45bea155 | 135 | static acpi_status __init |
02b28a33 | 136 | acpi_fake_ecdt_poll_callback(acpi_handle handle, |
50526df6 | 137 | u32 Level, void *context, void **retval); |
45bea155 LY |
138 | |
139 | static acpi_status __init | |
02b28a33 | 140 | acpi_fake_ecdt_intr_callback(acpi_handle handle, |
50526df6 LB |
141 | u32 Level, void *context, void **retval); |
142 | ||
02b28a33 LB |
143 | static int __init acpi_ec_poll_get_real_ecdt(void); |
144 | static int __init acpi_ec_intr_get_real_ecdt(void); | |
1da177e4 | 145 | /* If we find an EC via the ECDT, we need to keep a ptr to its context */ |
50526df6 | 146 | static union acpi_ec *ec_ecdt; |
1da177e4 LT |
147 | |
148 | /* External interfaces use first EC only, so remember */ | |
149 | static struct acpi_device *first_ec; | |
53f11d4f | 150 | static int acpi_ec_poll_mode = EC_INTR; |
1da177e4 LT |
151 | |
152 | /* -------------------------------------------------------------------------- | |
153 | Transaction Management | |
154 | -------------------------------------------------------------------------- */ | |
155 | ||
858119e1 | 156 | static u32 acpi_ec_read_status(union acpi_ec *ec) |
1da177e4 | 157 | { |
50526df6 | 158 | u32 status = 0; |
1da177e4 | 159 | |
45bea155 | 160 | acpi_hw_low_level_read(8, &status, &ec->common.status_addr); |
451566f4 DT |
161 | return status; |
162 | } | |
163 | ||
50526df6 | 164 | static int acpi_ec_wait(union acpi_ec *ec, u8 event) |
45bea155 | 165 | { |
02b28a33 LB |
166 | if (acpi_ec_poll_mode) |
167 | return acpi_ec_poll_wait(ec, event); | |
45bea155 | 168 | else |
02b28a33 | 169 | return acpi_ec_intr_wait(ec, event); |
45bea155 LY |
170 | } |
171 | ||
02b28a33 | 172 | static int acpi_ec_poll_wait(union acpi_ec *ec, u8 event) |
45bea155 | 173 | { |
50526df6 LB |
174 | u32 acpi_ec_status = 0; |
175 | u32 i = ACPI_EC_UDELAY_COUNT; | |
45bea155 LY |
176 | |
177 | if (!ec) | |
178 | return -EINVAL; | |
179 | ||
180 | /* Poll the EC status register waiting for the event to occur. */ | |
181 | switch (event) { | |
182 | case ACPI_EC_EVENT_OBF: | |
183 | do { | |
50526df6 LB |
184 | acpi_hw_low_level_read(8, &acpi_ec_status, |
185 | &ec->common.status_addr); | |
45bea155 LY |
186 | if (acpi_ec_status & ACPI_EC_FLAG_OBF) |
187 | return 0; | |
188 | udelay(ACPI_EC_UDELAY); | |
50526df6 | 189 | } while (--i > 0); |
45bea155 LY |
190 | break; |
191 | case ACPI_EC_EVENT_IBE: | |
192 | do { | |
50526df6 LB |
193 | acpi_hw_low_level_read(8, &acpi_ec_status, |
194 | &ec->common.status_addr); | |
45bea155 LY |
195 | if (!(acpi_ec_status & ACPI_EC_FLAG_IBF)) |
196 | return 0; | |
197 | udelay(ACPI_EC_UDELAY); | |
50526df6 | 198 | } while (--i > 0); |
45bea155 LY |
199 | break; |
200 | default: | |
201 | return -EINVAL; | |
202 | } | |
203 | ||
204 | return -ETIME; | |
205 | } | |
02b28a33 | 206 | static int acpi_ec_intr_wait(union acpi_ec *ec, unsigned int event) |
451566f4 | 207 | { |
50526df6 | 208 | int result = 0; |
451566f4 DT |
209 | |
210 | ACPI_FUNCTION_TRACE("acpi_ec_wait"); | |
1da177e4 | 211 | |
02b28a33 | 212 | ec->intr.expect_event = event; |
451566f4 DT |
213 | smp_mb(); |
214 | ||
716e084e | 215 | switch (event) { |
716e084e LY |
216 | case ACPI_EC_EVENT_IBE: |
217 | if (~acpi_ec_read_status(ec) & event) { | |
02b28a33 | 218 | ec->intr.expect_event = 0; |
716e084e LY |
219 | return_VALUE(0); |
220 | } | |
221 | break; | |
06a2a385 LY |
222 | default: |
223 | break; | |
716e084e LY |
224 | } |
225 | ||
02b28a33 LB |
226 | result = wait_event_timeout(ec->intr.wait, |
227 | !ec->intr.expect_event, | |
50526df6 LB |
228 | msecs_to_jiffies(ACPI_EC_DELAY)); |
229 | ||
02b28a33 | 230 | ec->intr.expect_event = 0; |
451566f4 DT |
231 | smp_mb(); |
232 | ||
451566f4 DT |
233 | /* |
234 | * Verify that the event in question has actually happened by | |
235 | * querying EC status. Do the check even if operation timed-out | |
236 | * to make sure that we did not miss interrupt. | |
237 | */ | |
1da177e4 LT |
238 | switch (event) { |
239 | case ACPI_EC_EVENT_OBF: | |
451566f4 DT |
240 | if (acpi_ec_read_status(ec) & ACPI_EC_FLAG_OBF) |
241 | return_VALUE(0); | |
1da177e4 | 242 | break; |
451566f4 | 243 | |
1da177e4 | 244 | case ACPI_EC_EVENT_IBE: |
451566f4 DT |
245 | if (~acpi_ec_read_status(ec) & ACPI_EC_FLAG_IBF) |
246 | return_VALUE(0); | |
1da177e4 | 247 | break; |
1da177e4 LT |
248 | } |
249 | ||
451566f4 | 250 | return_VALUE(-ETIME); |
1da177e4 LT |
251 | } |
252 | ||
02b28a33 | 253 | #ifdef ACPI_FUTURE_USAGE |
06a2a385 LY |
254 | /* |
255 | * Note: samsung nv5000 doesn't work with ec burst mode. | |
256 | * http://bugzilla.kernel.org/show_bug.cgi?id=4980 | |
257 | */ | |
258 | int acpi_ec_enter_burst_mode(union acpi_ec *ec) | |
451566f4 | 259 | { |
50526df6 LB |
260 | u32 tmp = 0; |
261 | int status = 0; | |
451566f4 DT |
262 | |
263 | ACPI_FUNCTION_TRACE("acpi_ec_enter_burst_mode"); | |
264 | ||
265 | status = acpi_ec_read_status(ec); | |
50526df6 | 266 | if (status != -EINVAL && !(status & ACPI_EC_FLAG_BURST)) { |
716e084e | 267 | status = acpi_ec_wait(ec, ACPI_EC_EVENT_IBE); |
50526df6 | 268 | if (status) |
716e084e | 269 | goto end; |
50526df6 LB |
270 | acpi_hw_low_level_write(8, ACPI_EC_BURST_ENABLE, |
271 | &ec->common.command_addr); | |
451566f4 | 272 | status = acpi_ec_wait(ec, ACPI_EC_EVENT_OBF); |
45bea155 | 273 | acpi_hw_low_level_read(8, &tmp, &ec->common.data_addr); |
50526df6 | 274 | if (tmp != 0x90) { /* Burst ACK byte */ |
451566f4 DT |
275 | return_VALUE(-EINVAL); |
276 | } | |
668d74c0 LY |
277 | } |
278 | ||
02b28a33 | 279 | atomic_set(&ec->intr.leaving_burst, 0); |
451566f4 | 280 | return_VALUE(0); |
50526df6 | 281 | end: |
a6fc6720 | 282 | ACPI_EXCEPTION ((AE_INFO, status, "EC wait, burst mode"); |
716e084e | 283 | return_VALUE(-1); |
451566f4 DT |
284 | } |
285 | ||
06a2a385 | 286 | int acpi_ec_leave_burst_mode(union acpi_ec *ec) |
451566f4 | 287 | { |
06a2a385 | 288 | int status = 0; |
451566f4 DT |
289 | |
290 | ACPI_FUNCTION_TRACE("acpi_ec_leave_burst_mode"); | |
291 | ||
06a2a385 LY |
292 | status = acpi_ec_read_status(ec); |
293 | if (status != -EINVAL && (status & ACPI_EC_FLAG_BURST)){ | |
294 | status = acpi_ec_wait(ec, ACPI_EC_FLAG_IBF); | |
295 | if(status) | |
296 | goto end; | |
297 | acpi_hw_low_level_write(8, ACPI_EC_BURST_DISABLE, &ec->common.command_addr); | |
298 | acpi_ec_wait(ec, ACPI_EC_FLAG_IBF); | |
299 | } | |
02b28a33 | 300 | atomic_set(&ec->intr.leaving_burst, 1); |
451566f4 | 301 | return_VALUE(0); |
06a2a385 | 302 | end: |
a6fc6720 | 303 | ACPI_EXCEPTION((AE_INFO, status, "EC leave burst mode"); |
06a2a385 | 304 | return_VALUE(-1); |
451566f4 | 305 | } |
02b28a33 | 306 | #endif /* ACPI_FUTURE_USAGE */ |
451566f4 | 307 | |
50526df6 | 308 | static int acpi_ec_read(union acpi_ec *ec, u8 address, u32 * data) |
45bea155 | 309 | { |
02b28a33 LB |
310 | if (acpi_ec_poll_mode) |
311 | return acpi_ec_poll_read(ec, address, data); | |
45bea155 | 312 | else |
02b28a33 | 313 | return acpi_ec_intr_read(ec, address, data); |
45bea155 | 314 | } |
50526df6 | 315 | static int acpi_ec_write(union acpi_ec *ec, u8 address, u8 data) |
45bea155 | 316 | { |
02b28a33 LB |
317 | if (acpi_ec_poll_mode) |
318 | return acpi_ec_poll_write(ec, address, data); | |
45bea155 | 319 | else |
02b28a33 | 320 | return acpi_ec_intr_write(ec, address, data); |
45bea155 | 321 | } |
02b28a33 | 322 | static int acpi_ec_poll_read(union acpi_ec *ec, u8 address, u32 * data) |
45bea155 | 323 | { |
50526df6 LB |
324 | acpi_status status = AE_OK; |
325 | int result = 0; | |
50526df6 | 326 | u32 glk = 0; |
45bea155 LY |
327 | |
328 | ACPI_FUNCTION_TRACE("acpi_ec_read"); | |
329 | ||
330 | if (!ec || !data) | |
331 | return_VALUE(-EINVAL); | |
332 | ||
333 | *data = 0; | |
334 | ||
335 | if (ec->common.global_lock) { | |
336 | status = acpi_acquire_global_lock(ACPI_EC_UDELAY_GLK, &glk); | |
337 | if (ACPI_FAILURE(status)) | |
338 | return_VALUE(-ENODEV); | |
339 | } | |
340 | ||
f9a6ee1a RT |
341 | if (down_interruptible(&ec->poll.sem)) { |
342 | result = -ERESTARTSYS; | |
343 | goto end_nosem; | |
344 | } | |
345 | ||
50526df6 LB |
346 | acpi_hw_low_level_write(8, ACPI_EC_COMMAND_READ, |
347 | &ec->common.command_addr); | |
45bea155 LY |
348 | result = acpi_ec_wait(ec, ACPI_EC_EVENT_IBE); |
349 | if (result) | |
350 | goto end; | |
351 | ||
352 | acpi_hw_low_level_write(8, address, &ec->common.data_addr); | |
353 | result = acpi_ec_wait(ec, ACPI_EC_EVENT_OBF); | |
354 | if (result) | |
355 | goto end; | |
356 | ||
357 | acpi_hw_low_level_read(8, data, &ec->common.data_addr); | |
358 | ||
359 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Read [%02x] from address [%02x]\n", | |
50526df6 LB |
360 | *data, address)); |
361 | ||
362 | end: | |
f9a6ee1a RT |
363 | up(&ec->poll.sem); |
364 | end_nosem: | |
45bea155 LY |
365 | if (ec->common.global_lock) |
366 | acpi_release_global_lock(glk); | |
367 | ||
368 | return_VALUE(result); | |
369 | } | |
370 | ||
02b28a33 | 371 | static int acpi_ec_poll_write(union acpi_ec *ec, u8 address, u8 data) |
45bea155 | 372 | { |
50526df6 LB |
373 | int result = 0; |
374 | acpi_status status = AE_OK; | |
50526df6 | 375 | u32 glk = 0; |
45bea155 LY |
376 | |
377 | ACPI_FUNCTION_TRACE("acpi_ec_write"); | |
378 | ||
379 | if (!ec) | |
380 | return_VALUE(-EINVAL); | |
381 | ||
382 | if (ec->common.global_lock) { | |
383 | status = acpi_acquire_global_lock(ACPI_EC_UDELAY_GLK, &glk); | |
384 | if (ACPI_FAILURE(status)) | |
385 | return_VALUE(-ENODEV); | |
386 | } | |
387 | ||
f9a6ee1a RT |
388 | if (down_interruptible(&ec->poll.sem)) { |
389 | result = -ERESTARTSYS; | |
390 | goto end_nosem; | |
391 | } | |
392 | ||
50526df6 LB |
393 | acpi_hw_low_level_write(8, ACPI_EC_COMMAND_WRITE, |
394 | &ec->common.command_addr); | |
45bea155 LY |
395 | result = acpi_ec_wait(ec, ACPI_EC_EVENT_IBE); |
396 | if (result) | |
397 | goto end; | |
398 | ||
399 | acpi_hw_low_level_write(8, address, &ec->common.data_addr); | |
400 | result = acpi_ec_wait(ec, ACPI_EC_EVENT_IBE); | |
401 | if (result) | |
402 | goto end; | |
403 | ||
404 | acpi_hw_low_level_write(8, data, &ec->common.data_addr); | |
405 | result = acpi_ec_wait(ec, ACPI_EC_EVENT_IBE); | |
406 | if (result) | |
407 | goto end; | |
408 | ||
409 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Wrote [%02x] to address [%02x]\n", | |
50526df6 | 410 | data, address)); |
45bea155 | 411 | |
50526df6 | 412 | end: |
f9a6ee1a RT |
413 | up(&ec->poll.sem); |
414 | end_nosem: | |
45bea155 LY |
415 | if (ec->common.global_lock) |
416 | acpi_release_global_lock(glk); | |
417 | ||
418 | return_VALUE(result); | |
419 | } | |
420 | ||
02b28a33 | 421 | static int acpi_ec_intr_read(union acpi_ec *ec, u8 address, u32 * data) |
1da177e4 | 422 | { |
50526df6 LB |
423 | int status = 0; |
424 | u32 glk; | |
1da177e4 LT |
425 | |
426 | ACPI_FUNCTION_TRACE("acpi_ec_read"); | |
427 | ||
428 | if (!ec || !data) | |
429 | return_VALUE(-EINVAL); | |
430 | ||
431 | *data = 0; | |
432 | ||
45bea155 | 433 | if (ec->common.global_lock) { |
1da177e4 LT |
434 | status = acpi_acquire_global_lock(ACPI_EC_UDELAY_GLK, &glk); |
435 | if (ACPI_FAILURE(status)) | |
436 | return_VALUE(-ENODEV); | |
437 | } | |
451566f4 DT |
438 | |
439 | WARN_ON(in_interrupt()); | |
02b28a33 | 440 | down(&ec->intr.sem); |
451566f4 | 441 | |
716e084e LY |
442 | status = acpi_ec_wait(ec, ACPI_EC_EVENT_IBE); |
443 | if (status) { | |
1e8df53c | 444 | printk(KERN_DEBUG PREFIX "read EC, IB not empty\n"); |
451566f4 | 445 | goto end; |
716e084e | 446 | } |
50526df6 LB |
447 | acpi_hw_low_level_write(8, ACPI_EC_COMMAND_READ, |
448 | &ec->common.command_addr); | |
451566f4 | 449 | status = acpi_ec_wait(ec, ACPI_EC_EVENT_IBE); |
451566f4 | 450 | if (status) { |
1e8df53c | 451 | printk(KERN_DEBUG PREFIX "read EC, IB not empty\n"); |
451566f4 | 452 | } |
1da177e4 | 453 | |
45bea155 | 454 | acpi_hw_low_level_write(8, address, &ec->common.data_addr); |
50526df6 LB |
455 | status = acpi_ec_wait(ec, ACPI_EC_EVENT_OBF); |
456 | if (status) { | |
1e8df53c | 457 | printk(KERN_DEBUG PREFIX "read EC, OB not full\n"); |
1da177e4 | 458 | goto end; |
451566f4 | 459 | } |
45bea155 | 460 | acpi_hw_low_level_read(8, data, &ec->common.data_addr); |
1da177e4 | 461 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Read [%02x] from address [%02x]\n", |
50526df6 LB |
462 | *data, address)); |
463 | ||
464 | end: | |
02b28a33 | 465 | up(&ec->intr.sem); |
1da177e4 | 466 | |
45bea155 | 467 | if (ec->common.global_lock) |
1da177e4 LT |
468 | acpi_release_global_lock(glk); |
469 | ||
451566f4 | 470 | return_VALUE(status); |
1da177e4 LT |
471 | } |
472 | ||
02b28a33 | 473 | static int acpi_ec_intr_write(union acpi_ec *ec, u8 address, u8 data) |
1da177e4 | 474 | { |
50526df6 LB |
475 | int status = 0; |
476 | u32 glk; | |
1da177e4 LT |
477 | |
478 | ACPI_FUNCTION_TRACE("acpi_ec_write"); | |
479 | ||
480 | if (!ec) | |
481 | return_VALUE(-EINVAL); | |
716e084e | 482 | |
45bea155 | 483 | if (ec->common.global_lock) { |
1da177e4 LT |
484 | status = acpi_acquire_global_lock(ACPI_EC_UDELAY_GLK, &glk); |
485 | if (ACPI_FAILURE(status)) | |
486 | return_VALUE(-ENODEV); | |
487 | } | |
488 | ||
451566f4 | 489 | WARN_ON(in_interrupt()); |
02b28a33 | 490 | down(&ec->intr.sem); |
451566f4 | 491 | |
716e084e | 492 | status = acpi_ec_wait(ec, ACPI_EC_EVENT_IBE); |
50526df6 | 493 | if (status) { |
1e8df53c | 494 | printk(KERN_DEBUG PREFIX "write EC, IB not empty\n"); |
451566f4 | 495 | } |
50526df6 LB |
496 | acpi_hw_low_level_write(8, ACPI_EC_COMMAND_WRITE, |
497 | &ec->common.command_addr); | |
451566f4 | 498 | status = acpi_ec_wait(ec, ACPI_EC_EVENT_IBE); |
716e084e | 499 | if (status) { |
1e8df53c | 500 | printk(KERN_DEBUG PREFIX "write EC, IB not empty\n"); |
451566f4 | 501 | } |
1da177e4 | 502 | |
45bea155 | 503 | acpi_hw_low_level_write(8, address, &ec->common.data_addr); |
451566f4 | 504 | status = acpi_ec_wait(ec, ACPI_EC_EVENT_IBE); |
50526df6 | 505 | if (status) { |
1e8df53c | 506 | printk(KERN_DEBUG PREFIX "write EC, IB not empty\n"); |
451566f4 | 507 | } |
1da177e4 | 508 | |
45bea155 | 509 | acpi_hw_low_level_write(8, data, &ec->common.data_addr); |
1da177e4 LT |
510 | |
511 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Wrote [%02x] to address [%02x]\n", | |
50526df6 | 512 | data, address)); |
1da177e4 | 513 | |
02b28a33 | 514 | up(&ec->intr.sem); |
1da177e4 | 515 | |
45bea155 | 516 | if (ec->common.global_lock) |
1da177e4 LT |
517 | acpi_release_global_lock(glk); |
518 | ||
451566f4 | 519 | return_VALUE(status); |
1da177e4 LT |
520 | } |
521 | ||
522 | /* | |
523 | * Externally callable EC access functions. For now, assume 1 EC only | |
524 | */ | |
50526df6 | 525 | int ec_read(u8 addr, u8 * val) |
1da177e4 | 526 | { |
45bea155 | 527 | union acpi_ec *ec; |
1da177e4 LT |
528 | int err; |
529 | u32 temp_data; | |
530 | ||
531 | if (!first_ec) | |
532 | return -ENODEV; | |
533 | ||
534 | ec = acpi_driver_data(first_ec); | |
535 | ||
536 | err = acpi_ec_read(ec, addr, &temp_data); | |
537 | ||
538 | if (!err) { | |
539 | *val = temp_data; | |
540 | return 0; | |
50526df6 | 541 | } else |
1da177e4 LT |
542 | return err; |
543 | } | |
50526df6 | 544 | |
1da177e4 LT |
545 | EXPORT_SYMBOL(ec_read); |
546 | ||
50526df6 | 547 | int ec_write(u8 addr, u8 val) |
1da177e4 | 548 | { |
45bea155 | 549 | union acpi_ec *ec; |
1da177e4 LT |
550 | int err; |
551 | ||
552 | if (!first_ec) | |
553 | return -ENODEV; | |
554 | ||
555 | ec = acpi_driver_data(first_ec); | |
556 | ||
557 | err = acpi_ec_write(ec, addr, val); | |
558 | ||
559 | return err; | |
560 | } | |
50526df6 | 561 | |
1da177e4 LT |
562 | EXPORT_SYMBOL(ec_write); |
563 | ||
50526df6 | 564 | static int acpi_ec_query(union acpi_ec *ec, u32 * data) |
45bea155 | 565 | { |
02b28a33 LB |
566 | if (acpi_ec_poll_mode) |
567 | return acpi_ec_poll_query(ec, data); | |
45bea155 | 568 | else |
02b28a33 | 569 | return acpi_ec_intr_query(ec, data); |
45bea155 | 570 | } |
02b28a33 | 571 | static int acpi_ec_poll_query(union acpi_ec *ec, u32 * data) |
45bea155 | 572 | { |
50526df6 LB |
573 | int result = 0; |
574 | acpi_status status = AE_OK; | |
50526df6 | 575 | u32 glk = 0; |
45bea155 LY |
576 | |
577 | ACPI_FUNCTION_TRACE("acpi_ec_query"); | |
578 | ||
579 | if (!ec || !data) | |
580 | return_VALUE(-EINVAL); | |
581 | ||
582 | *data = 0; | |
583 | ||
584 | if (ec->common.global_lock) { | |
585 | status = acpi_acquire_global_lock(ACPI_EC_UDELAY_GLK, &glk); | |
586 | if (ACPI_FAILURE(status)) | |
587 | return_VALUE(-ENODEV); | |
588 | } | |
589 | ||
590 | /* | |
591 | * Query the EC to find out which _Qxx method we need to evaluate. | |
592 | * Note that successful completion of the query causes the ACPI_EC_SCI | |
593 | * bit to be cleared (and thus clearing the interrupt source). | |
594 | */ | |
f9a6ee1a RT |
595 | if (down_interruptible(&ec->poll.sem)) { |
596 | result = -ERESTARTSYS; | |
597 | goto end_nosem; | |
598 | } | |
599 | ||
50526df6 LB |
600 | acpi_hw_low_level_write(8, ACPI_EC_COMMAND_QUERY, |
601 | &ec->common.command_addr); | |
45bea155 LY |
602 | result = acpi_ec_wait(ec, ACPI_EC_EVENT_OBF); |
603 | if (result) | |
604 | goto end; | |
605 | ||
606 | acpi_hw_low_level_read(8, data, &ec->common.data_addr); | |
607 | if (!*data) | |
608 | result = -ENODATA; | |
609 | ||
50526df6 | 610 | end: |
f9a6ee1a RT |
611 | up(&ec->poll.sem); |
612 | end_nosem: | |
45bea155 LY |
613 | if (ec->common.global_lock) |
614 | acpi_release_global_lock(glk); | |
615 | ||
616 | return_VALUE(result); | |
617 | } | |
02b28a33 | 618 | static int acpi_ec_intr_query(union acpi_ec *ec, u32 * data) |
1da177e4 | 619 | { |
50526df6 LB |
620 | int status = 0; |
621 | u32 glk; | |
1da177e4 LT |
622 | |
623 | ACPI_FUNCTION_TRACE("acpi_ec_query"); | |
624 | ||
625 | if (!ec || !data) | |
626 | return_VALUE(-EINVAL); | |
1da177e4 LT |
627 | *data = 0; |
628 | ||
45bea155 | 629 | if (ec->common.global_lock) { |
1da177e4 LT |
630 | status = acpi_acquire_global_lock(ACPI_EC_UDELAY_GLK, &glk); |
631 | if (ACPI_FAILURE(status)) | |
632 | return_VALUE(-ENODEV); | |
633 | } | |
634 | ||
02b28a33 | 635 | down(&ec->intr.sem); |
716e084e LY |
636 | |
637 | status = acpi_ec_wait(ec, ACPI_EC_EVENT_IBE); | |
638 | if (status) { | |
1e8df53c | 639 | printk(KERN_DEBUG PREFIX "query EC, IB not empty\n"); |
451566f4 | 640 | goto end; |
716e084e | 641 | } |
1da177e4 LT |
642 | /* |
643 | * Query the EC to find out which _Qxx method we need to evaluate. | |
644 | * Note that successful completion of the query causes the ACPI_EC_SCI | |
645 | * bit to be cleared (and thus clearing the interrupt source). | |
646 | */ | |
50526df6 LB |
647 | acpi_hw_low_level_write(8, ACPI_EC_COMMAND_QUERY, |
648 | &ec->common.command_addr); | |
451566f4 | 649 | status = acpi_ec_wait(ec, ACPI_EC_EVENT_OBF); |
50526df6 | 650 | if (status) { |
1e8df53c | 651 | printk(KERN_DEBUG PREFIX "query EC, OB not full\n"); |
1da177e4 | 652 | goto end; |
451566f4 DT |
653 | } |
654 | ||
45bea155 | 655 | acpi_hw_low_level_read(8, data, &ec->common.data_addr); |
1da177e4 | 656 | if (!*data) |
451566f4 | 657 | status = -ENODATA; |
1da177e4 | 658 | |
50526df6 | 659 | end: |
02b28a33 | 660 | up(&ec->intr.sem); |
1da177e4 | 661 | |
45bea155 | 662 | if (ec->common.global_lock) |
1da177e4 LT |
663 | acpi_release_global_lock(glk); |
664 | ||
451566f4 | 665 | return_VALUE(status); |
1da177e4 LT |
666 | } |
667 | ||
1da177e4 LT |
668 | /* -------------------------------------------------------------------------- |
669 | Event Management | |
670 | -------------------------------------------------------------------------- */ | |
671 | ||
45bea155 | 672 | union acpi_ec_query_data { |
50526df6 LB |
673 | acpi_handle handle; |
674 | u8 data; | |
1da177e4 LT |
675 | }; |
676 | ||
50526df6 | 677 | static void acpi_ec_gpe_query(void *ec_cxt) |
1da177e4 | 678 | { |
02b28a33 LB |
679 | if (acpi_ec_poll_mode) |
680 | acpi_ec_gpe_poll_query(ec_cxt); | |
45bea155 | 681 | else |
02b28a33 | 682 | acpi_ec_gpe_intr_query(ec_cxt); |
45bea155 LY |
683 | } |
684 | ||
02b28a33 | 685 | static void acpi_ec_gpe_poll_query(void *ec_cxt) |
45bea155 | 686 | { |
50526df6 LB |
687 | union acpi_ec *ec = (union acpi_ec *)ec_cxt; |
688 | u32 value = 0; | |
50526df6 LB |
689 | static char object_name[5] = { '_', 'Q', '0', '0', '\0' }; |
690 | const char hex[] = { '0', '1', '2', '3', '4', '5', '6', '7', | |
691 | '8', '9', 'A', 'B', 'C', 'D', 'E', 'F' | |
692 | }; | |
45bea155 LY |
693 | |
694 | ACPI_FUNCTION_TRACE("acpi_ec_gpe_query"); | |
695 | ||
696 | if (!ec_cxt) | |
697 | goto end; | |
698 | ||
f9a6ee1a RT |
699 | if (down_interruptible (&ec->poll.sem)) { |
700 | return_VOID; | |
701 | } | |
45bea155 | 702 | acpi_hw_low_level_read(8, &value, &ec->common.command_addr); |
f9a6ee1a | 703 | up(&ec->poll.sem); |
45bea155 LY |
704 | |
705 | /* TBD: Implement asynch events! | |
706 | * NOTE: All we care about are EC-SCI's. Other EC events are | |
707 | * handled via polling (yuck!). This is because some systems | |
708 | * treat EC-SCIs as level (versus EDGE!) triggered, preventing | |
709 | * a purely interrupt-driven approach (grumble, grumble). | |
710 | */ | |
711 | if (!(value & ACPI_EC_FLAG_SCI)) | |
712 | goto end; | |
713 | ||
714 | if (acpi_ec_query(ec, &value)) | |
715 | goto end; | |
716 | ||
717 | object_name[2] = hex[((value >> 4) & 0x0F)]; | |
718 | object_name[3] = hex[(value & 0x0F)]; | |
719 | ||
720 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Evaluating %s\n", object_name)); | |
721 | ||
722 | acpi_evaluate_object(ec->common.handle, object_name, NULL, NULL); | |
723 | ||
50526df6 | 724 | end: |
45bea155 LY |
725 | acpi_enable_gpe(NULL, ec->common.gpe_bit, ACPI_NOT_ISR); |
726 | } | |
02b28a33 | 727 | static void acpi_ec_gpe_intr_query(void *ec_cxt) |
45bea155 | 728 | { |
50526df6 LB |
729 | union acpi_ec *ec = (union acpi_ec *)ec_cxt; |
730 | u32 value; | |
731 | int result = -ENODATA; | |
732 | static char object_name[5] = { '_', 'Q', '0', '0', '\0' }; | |
733 | const char hex[] = { '0', '1', '2', '3', '4', '5', '6', '7', | |
734 | '8', '9', 'A', 'B', 'C', 'D', 'E', 'F' | |
735 | }; | |
1da177e4 LT |
736 | |
737 | ACPI_FUNCTION_TRACE("acpi_ec_gpe_query"); | |
738 | ||
451566f4 DT |
739 | if (acpi_ec_read_status(ec) & ACPI_EC_FLAG_SCI) |
740 | result = acpi_ec_query(ec, &value); | |
1da177e4 | 741 | |
451566f4 | 742 | if (result) |
1da177e4 LT |
743 | goto end; |
744 | ||
1da177e4 LT |
745 | object_name[2] = hex[((value >> 4) & 0x0F)]; |
746 | object_name[3] = hex[(value & 0x0F)]; | |
747 | ||
748 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Evaluating %s\n", object_name)); | |
749 | ||
45bea155 | 750 | acpi_evaluate_object(ec->common.handle, object_name, NULL, NULL); |
50526df6 | 751 | end: |
02b28a33 | 752 | atomic_dec(&ec->intr.pending_gpe); |
451566f4 | 753 | return; |
1da177e4 LT |
754 | } |
755 | ||
50526df6 | 756 | static u32 acpi_ec_gpe_handler(void *data) |
45bea155 | 757 | { |
02b28a33 LB |
758 | if (acpi_ec_poll_mode) |
759 | return acpi_ec_gpe_poll_handler(data); | |
45bea155 | 760 | else |
02b28a33 | 761 | return acpi_ec_gpe_intr_handler(data); |
45bea155 | 762 | } |
02b28a33 | 763 | static u32 acpi_ec_gpe_poll_handler(void *data) |
45bea155 | 764 | { |
50526df6 LB |
765 | acpi_status status = AE_OK; |
766 | union acpi_ec *ec = (union acpi_ec *)data; | |
45bea155 LY |
767 | |
768 | if (!ec) | |
769 | return ACPI_INTERRUPT_NOT_HANDLED; | |
770 | ||
771 | acpi_disable_gpe(NULL, ec->common.gpe_bit, ACPI_ISR); | |
772 | ||
b8d35192 | 773 | status = acpi_os_execute(OSL_EC_POLL_HANDLER, acpi_ec_gpe_query, ec); |
45bea155 LY |
774 | |
775 | if (status == AE_OK) | |
776 | return ACPI_INTERRUPT_HANDLED; | |
777 | else | |
778 | return ACPI_INTERRUPT_NOT_HANDLED; | |
779 | } | |
02b28a33 | 780 | static u32 acpi_ec_gpe_intr_handler(void *data) |
1da177e4 | 781 | { |
50526df6 LB |
782 | acpi_status status = AE_OK; |
783 | u32 value; | |
784 | union acpi_ec *ec = (union acpi_ec *)data; | |
1da177e4 LT |
785 | |
786 | if (!ec) | |
787 | return ACPI_INTERRUPT_NOT_HANDLED; | |
788 | ||
716e084e | 789 | acpi_clear_gpe(NULL, ec->common.gpe_bit, ACPI_ISR); |
451566f4 | 790 | value = acpi_ec_read_status(ec); |
1da177e4 | 791 | |
02b28a33 | 792 | switch (ec->intr.expect_event) { |
716e084e LY |
793 | case ACPI_EC_EVENT_OBF: |
794 | if (!(value & ACPI_EC_FLAG_OBF)) | |
795 | break; | |
796 | case ACPI_EC_EVENT_IBE: | |
797 | if ((value & ACPI_EC_FLAG_IBF)) | |
798 | break; | |
02b28a33 LB |
799 | ec->intr.expect_event = 0; |
800 | wake_up(&ec->intr.wait); | |
716e084e LY |
801 | return ACPI_INTERRUPT_HANDLED; |
802 | default: | |
803 | break; | |
451566f4 DT |
804 | } |
805 | ||
50526df6 | 806 | if (value & ACPI_EC_FLAG_SCI) { |
02b28a33 | 807 | atomic_add(1, &ec->intr.pending_gpe); |
b8d35192 | 808 | status = acpi_os_execute(OSL_EC_BURST_HANDLER, |
50526df6 | 809 | acpi_ec_gpe_query, ec); |
17e9c78a | 810 | return status == AE_OK ? |
50526df6 LB |
811 | ACPI_INTERRUPT_HANDLED : ACPI_INTERRUPT_NOT_HANDLED; |
812 | } | |
45bea155 | 813 | acpi_enable_gpe(NULL, ec->common.gpe_bit, ACPI_ISR); |
451566f4 | 814 | return status == AE_OK ? |
50526df6 | 815 | ACPI_INTERRUPT_HANDLED : ACPI_INTERRUPT_NOT_HANDLED; |
1da177e4 LT |
816 | } |
817 | ||
818 | /* -------------------------------------------------------------------------- | |
819 | Address Space Management | |
820 | -------------------------------------------------------------------------- */ | |
821 | ||
822 | static acpi_status | |
50526df6 LB |
823 | acpi_ec_space_setup(acpi_handle region_handle, |
824 | u32 function, void *handler_context, void **return_context) | |
1da177e4 LT |
825 | { |
826 | /* | |
827 | * The EC object is in the handler context and is needed | |
828 | * when calling the acpi_ec_space_handler. | |
829 | */ | |
50526df6 LB |
830 | *return_context = (function != ACPI_REGION_DEACTIVATE) ? |
831 | handler_context : NULL; | |
1da177e4 LT |
832 | |
833 | return AE_OK; | |
834 | } | |
835 | ||
1da177e4 | 836 | static acpi_status |
50526df6 LB |
837 | acpi_ec_space_handler(u32 function, |
838 | acpi_physical_address address, | |
839 | u32 bit_width, | |
840 | acpi_integer * value, | |
841 | void *handler_context, void *region_context) | |
1da177e4 | 842 | { |
50526df6 LB |
843 | int result = 0; |
844 | union acpi_ec *ec = NULL; | |
845 | u64 temp = *value; | |
846 | acpi_integer f_v = 0; | |
847 | int i = 0; | |
1da177e4 LT |
848 | |
849 | ACPI_FUNCTION_TRACE("acpi_ec_space_handler"); | |
850 | ||
851 | if ((address > 0xFF) || !value || !handler_context) | |
852 | return_VALUE(AE_BAD_PARAMETER); | |
853 | ||
fa9cd547 | 854 | if (bit_width != 8 && acpi_strict) { |
50526df6 LB |
855 | printk(KERN_WARNING PREFIX |
856 | "acpi_ec_space_handler: bit_width should be 8\n"); | |
fa9cd547 | 857 | return_VALUE(AE_BAD_PARAMETER); |
1da177e4 LT |
858 | } |
859 | ||
50526df6 | 860 | ec = (union acpi_ec *)handler_context; |
1da177e4 | 861 | |
50526df6 | 862 | next_byte: |
1da177e4 LT |
863 | switch (function) { |
864 | case ACPI_READ: | |
fa9cd547 | 865 | temp = 0; |
50526df6 | 866 | result = acpi_ec_read(ec, (u8) address, (u32 *) & temp); |
1da177e4 LT |
867 | break; |
868 | case ACPI_WRITE: | |
fa9cd547 | 869 | result = acpi_ec_write(ec, (u8) address, (u8) temp); |
1da177e4 LT |
870 | break; |
871 | default: | |
872 | result = -EINVAL; | |
873 | goto out; | |
874 | break; | |
875 | } | |
876 | ||
877 | bit_width -= 8; | |
fa9cd547 LY |
878 | if (bit_width) { |
879 | if (function == ACPI_READ) | |
880 | f_v |= temp << 8 * i; | |
881 | if (function == ACPI_WRITE) | |
882 | temp >>= 8; | |
1da177e4 | 883 | i++; |
83ea7445 | 884 | address++; |
1da177e4 LT |
885 | goto next_byte; |
886 | } | |
887 | ||
fa9cd547 LY |
888 | if (function == ACPI_READ) { |
889 | f_v |= temp << 8 * i; | |
1da177e4 LT |
890 | *value = f_v; |
891 | } | |
892 | ||
50526df6 | 893 | out: |
1da177e4 LT |
894 | switch (result) { |
895 | case -EINVAL: | |
896 | return_VALUE(AE_BAD_PARAMETER); | |
897 | break; | |
898 | case -ENODEV: | |
899 | return_VALUE(AE_NOT_FOUND); | |
900 | break; | |
901 | case -ETIME: | |
902 | return_VALUE(AE_TIME); | |
903 | break; | |
904 | default: | |
905 | return_VALUE(AE_OK); | |
906 | } | |
1da177e4 LT |
907 | } |
908 | ||
1da177e4 LT |
909 | /* -------------------------------------------------------------------------- |
910 | FS Interface (/proc) | |
911 | -------------------------------------------------------------------------- */ | |
912 | ||
50526df6 | 913 | static struct proc_dir_entry *acpi_ec_dir; |
1da177e4 | 914 | |
50526df6 | 915 | static int acpi_ec_read_info(struct seq_file *seq, void *offset) |
1da177e4 | 916 | { |
50526df6 | 917 | union acpi_ec *ec = (union acpi_ec *)seq->private; |
1da177e4 LT |
918 | |
919 | ACPI_FUNCTION_TRACE("acpi_ec_read_info"); | |
920 | ||
921 | if (!ec) | |
922 | goto end; | |
923 | ||
924 | seq_printf(seq, "gpe bit: 0x%02x\n", | |
50526df6 | 925 | (u32) ec->common.gpe_bit); |
1da177e4 | 926 | seq_printf(seq, "ports: 0x%02x, 0x%02x\n", |
50526df6 LB |
927 | (u32) ec->common.status_addr.address, |
928 | (u32) ec->common.data_addr.address); | |
1da177e4 | 929 | seq_printf(seq, "use global lock: %s\n", |
50526df6 | 930 | ec->common.global_lock ? "yes" : "no"); |
45bea155 | 931 | acpi_enable_gpe(NULL, ec->common.gpe_bit, ACPI_NOT_ISR); |
1da177e4 | 932 | |
50526df6 | 933 | end: |
1da177e4 LT |
934 | return_VALUE(0); |
935 | } | |
936 | ||
937 | static int acpi_ec_info_open_fs(struct inode *inode, struct file *file) | |
938 | { | |
939 | return single_open(file, acpi_ec_read_info, PDE(inode)->data); | |
940 | } | |
941 | ||
942 | static struct file_operations acpi_ec_info_ops = { | |
50526df6 LB |
943 | .open = acpi_ec_info_open_fs, |
944 | .read = seq_read, | |
945 | .llseek = seq_lseek, | |
946 | .release = single_release, | |
1da177e4 LT |
947 | .owner = THIS_MODULE, |
948 | }; | |
949 | ||
50526df6 | 950 | static int acpi_ec_add_fs(struct acpi_device *device) |
1da177e4 | 951 | { |
50526df6 | 952 | struct proc_dir_entry *entry = NULL; |
1da177e4 LT |
953 | |
954 | ACPI_FUNCTION_TRACE("acpi_ec_add_fs"); | |
955 | ||
956 | if (!acpi_device_dir(device)) { | |
957 | acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device), | |
50526df6 | 958 | acpi_ec_dir); |
1da177e4 LT |
959 | if (!acpi_device_dir(device)) |
960 | return_VALUE(-ENODEV); | |
961 | } | |
962 | ||
963 | entry = create_proc_entry(ACPI_EC_FILE_INFO, S_IRUGO, | |
50526df6 | 964 | acpi_device_dir(device)); |
1da177e4 | 965 | if (!entry) |
a6fc6720 | 966 | return_VALUE(-ENODEV); |
1da177e4 LT |
967 | else { |
968 | entry->proc_fops = &acpi_ec_info_ops; | |
969 | entry->data = acpi_driver_data(device); | |
970 | entry->owner = THIS_MODULE; | |
971 | } | |
972 | ||
973 | return_VALUE(0); | |
974 | } | |
975 | ||
50526df6 | 976 | static int acpi_ec_remove_fs(struct acpi_device *device) |
1da177e4 LT |
977 | { |
978 | ACPI_FUNCTION_TRACE("acpi_ec_remove_fs"); | |
979 | ||
980 | if (acpi_device_dir(device)) { | |
981 | remove_proc_entry(ACPI_EC_FILE_INFO, acpi_device_dir(device)); | |
982 | remove_proc_entry(acpi_device_bid(device), acpi_ec_dir); | |
983 | acpi_device_dir(device) = NULL; | |
984 | } | |
985 | ||
986 | return_VALUE(0); | |
987 | } | |
988 | ||
1da177e4 LT |
989 | /* -------------------------------------------------------------------------- |
990 | Driver Interface | |
991 | -------------------------------------------------------------------------- */ | |
992 | ||
02b28a33 | 993 | static int acpi_ec_poll_add(struct acpi_device *device) |
1da177e4 | 994 | { |
50526df6 LB |
995 | int result = 0; |
996 | acpi_status status = AE_OK; | |
997 | union acpi_ec *ec = NULL; | |
45bea155 LY |
998 | |
999 | ACPI_FUNCTION_TRACE("acpi_ec_add"); | |
1000 | ||
1001 | if (!device) | |
1002 | return_VALUE(-EINVAL); | |
1003 | ||
1004 | ec = kmalloc(sizeof(union acpi_ec), GFP_KERNEL); | |
1005 | if (!ec) | |
1006 | return_VALUE(-ENOMEM); | |
1007 | memset(ec, 0, sizeof(union acpi_ec)); | |
1008 | ||
1009 | ec->common.handle = device->handle; | |
1010 | ec->common.uid = -1; | |
f9a6ee1a | 1011 | init_MUTEX(&ec->poll.sem); |
45bea155 LY |
1012 | strcpy(acpi_device_name(device), ACPI_EC_DEVICE_NAME); |
1013 | strcpy(acpi_device_class(device), ACPI_EC_CLASS); | |
1014 | acpi_driver_data(device) = ec; | |
1015 | ||
1016 | /* Use the global lock for all EC transactions? */ | |
50526df6 LB |
1017 | acpi_evaluate_integer(ec->common.handle, "_GLK", NULL, |
1018 | &ec->common.global_lock); | |
45bea155 | 1019 | |
ff2fc3e9 JS |
1020 | /* XXX we don't test uids, because on some boxes ecdt uid = 0, see: |
1021 | http://bugzilla.kernel.org/show_bug.cgi?id=6111 */ | |
1022 | if (ec_ecdt) { | |
45bea155 | 1023 | acpi_remove_address_space_handler(ACPI_ROOT_OBJECT, |
50526df6 LB |
1024 | ACPI_ADR_SPACE_EC, |
1025 | &acpi_ec_space_handler); | |
1026 | ||
1027 | acpi_remove_gpe_handler(NULL, ec_ecdt->common.gpe_bit, | |
1028 | &acpi_ec_gpe_handler); | |
45bea155 LY |
1029 | |
1030 | kfree(ec_ecdt); | |
1031 | } | |
1032 | ||
1033 | /* Get GPE bit assignment (EC events). */ | |
1034 | /* TODO: Add support for _GPE returning a package */ | |
50526df6 LB |
1035 | status = |
1036 | acpi_evaluate_integer(ec->common.handle, "_GPE", NULL, | |
1037 | &ec->common.gpe_bit); | |
45bea155 | 1038 | if (ACPI_FAILURE(status)) { |
a6fc6720 | 1039 | ACPI_EXCEPTION((AE_INFO, status, "Obtaining GPE bit")); |
45bea155 LY |
1040 | result = -ENODEV; |
1041 | goto end; | |
1042 | } | |
1043 | ||
1044 | result = acpi_ec_add_fs(device); | |
1045 | if (result) | |
1046 | goto end; | |
1047 | ||
02b28a33 | 1048 | printk(KERN_INFO PREFIX "%s [%s] (gpe %d) polling mode.\n", |
50526df6 LB |
1049 | acpi_device_name(device), acpi_device_bid(device), |
1050 | (u32) ec->common.gpe_bit); | |
45bea155 LY |
1051 | |
1052 | if (!first_ec) | |
1053 | first_ec = device; | |
1054 | ||
50526df6 | 1055 | end: |
45bea155 LY |
1056 | if (result) |
1057 | kfree(ec); | |
1058 | ||
1059 | return_VALUE(result); | |
1060 | } | |
02b28a33 | 1061 | static int acpi_ec_intr_add(struct acpi_device *device) |
45bea155 | 1062 | { |
50526df6 LB |
1063 | int result = 0; |
1064 | acpi_status status = AE_OK; | |
1065 | union acpi_ec *ec = NULL; | |
1da177e4 LT |
1066 | |
1067 | ACPI_FUNCTION_TRACE("acpi_ec_add"); | |
1068 | ||
1069 | if (!device) | |
1070 | return_VALUE(-EINVAL); | |
1071 | ||
45bea155 | 1072 | ec = kmalloc(sizeof(union acpi_ec), GFP_KERNEL); |
1da177e4 LT |
1073 | if (!ec) |
1074 | return_VALUE(-ENOMEM); | |
45bea155 LY |
1075 | memset(ec, 0, sizeof(union acpi_ec)); |
1076 | ||
1077 | ec->common.handle = device->handle; | |
1078 | ec->common.uid = -1; | |
02b28a33 LB |
1079 | atomic_set(&ec->intr.pending_gpe, 0); |
1080 | atomic_set(&ec->intr.leaving_burst, 1); | |
1081 | init_MUTEX(&ec->intr.sem); | |
1082 | init_waitqueue_head(&ec->intr.wait); | |
1da177e4 LT |
1083 | strcpy(acpi_device_name(device), ACPI_EC_DEVICE_NAME); |
1084 | strcpy(acpi_device_class(device), ACPI_EC_CLASS); | |
1085 | acpi_driver_data(device) = ec; | |
1086 | ||
1087 | /* Use the global lock for all EC transactions? */ | |
50526df6 LB |
1088 | acpi_evaluate_integer(ec->common.handle, "_GLK", NULL, |
1089 | &ec->common.global_lock); | |
1da177e4 | 1090 | |
ff2fc3e9 JS |
1091 | /* XXX we don't test uids, because on some boxes ecdt uid = 0, see: |
1092 | http://bugzilla.kernel.org/show_bug.cgi?id=6111 */ | |
1093 | if (ec_ecdt) { | |
1da177e4 | 1094 | acpi_remove_address_space_handler(ACPI_ROOT_OBJECT, |
50526df6 LB |
1095 | ACPI_ADR_SPACE_EC, |
1096 | &acpi_ec_space_handler); | |
451566f4 | 1097 | |
50526df6 LB |
1098 | acpi_remove_gpe_handler(NULL, ec_ecdt->common.gpe_bit, |
1099 | &acpi_ec_gpe_handler); | |
1da177e4 LT |
1100 | |
1101 | kfree(ec_ecdt); | |
1102 | } | |
1103 | ||
1104 | /* Get GPE bit assignment (EC events). */ | |
1105 | /* TODO: Add support for _GPE returning a package */ | |
50526df6 LB |
1106 | status = |
1107 | acpi_evaluate_integer(ec->common.handle, "_GPE", NULL, | |
1108 | &ec->common.gpe_bit); | |
1da177e4 | 1109 | if (ACPI_FAILURE(status)) { |
a6fc6720 | 1110 | ACPI_ERROR((AE_INFO, "Obtaining GPE bit assignment")); |
1da177e4 LT |
1111 | result = -ENODEV; |
1112 | goto end; | |
1113 | } | |
1114 | ||
1115 | result = acpi_ec_add_fs(device); | |
1116 | if (result) | |
1117 | goto end; | |
1118 | ||
02b28a33 | 1119 | printk(KERN_INFO PREFIX "%s [%s] (gpe %d) interrupt mode.\n", |
50526df6 LB |
1120 | acpi_device_name(device), acpi_device_bid(device), |
1121 | (u32) ec->common.gpe_bit); | |
1da177e4 LT |
1122 | |
1123 | if (!first_ec) | |
1124 | first_ec = device; | |
1125 | ||
50526df6 | 1126 | end: |
1da177e4 LT |
1127 | if (result) |
1128 | kfree(ec); | |
1129 | ||
1130 | return_VALUE(result); | |
1131 | } | |
1132 | ||
50526df6 | 1133 | static int acpi_ec_remove(struct acpi_device *device, int type) |
1da177e4 | 1134 | { |
50526df6 | 1135 | union acpi_ec *ec = NULL; |
1da177e4 LT |
1136 | |
1137 | ACPI_FUNCTION_TRACE("acpi_ec_remove"); | |
1138 | ||
1139 | if (!device) | |
1140 | return_VALUE(-EINVAL); | |
1141 | ||
1142 | ec = acpi_driver_data(device); | |
1143 | ||
1144 | acpi_ec_remove_fs(device); | |
1145 | ||
1146 | kfree(ec); | |
1147 | ||
1148 | return_VALUE(0); | |
1149 | } | |
1150 | ||
1da177e4 | 1151 | static acpi_status |
50526df6 | 1152 | acpi_ec_io_ports(struct acpi_resource *resource, void *context) |
1da177e4 | 1153 | { |
50526df6 | 1154 | union acpi_ec *ec = (union acpi_ec *)context; |
1da177e4 LT |
1155 | struct acpi_generic_address *addr; |
1156 | ||
50eca3eb | 1157 | if (resource->type != ACPI_RESOURCE_TYPE_IO) { |
1da177e4 LT |
1158 | return AE_OK; |
1159 | } | |
1160 | ||
1161 | /* | |
1162 | * The first address region returned is the data port, and | |
1163 | * the second address region returned is the status/command | |
1164 | * port. | |
1165 | */ | |
45bea155 LY |
1166 | if (ec->common.data_addr.register_bit_width == 0) { |
1167 | addr = &ec->common.data_addr; | |
1168 | } else if (ec->common.command_addr.register_bit_width == 0) { | |
1169 | addr = &ec->common.command_addr; | |
1da177e4 LT |
1170 | } else { |
1171 | return AE_CTRL_TERMINATE; | |
1172 | } | |
1173 | ||
1174 | addr->address_space_id = ACPI_ADR_SPACE_SYSTEM_IO; | |
1175 | addr->register_bit_width = 8; | |
1176 | addr->register_bit_offset = 0; | |
50eca3eb | 1177 | addr->address = resource->data.io.minimum; |
1da177e4 LT |
1178 | |
1179 | return AE_OK; | |
1180 | } | |
1181 | ||
50526df6 | 1182 | static int acpi_ec_start(struct acpi_device *device) |
1da177e4 | 1183 | { |
50526df6 LB |
1184 | acpi_status status = AE_OK; |
1185 | union acpi_ec *ec = NULL; | |
1da177e4 LT |
1186 | |
1187 | ACPI_FUNCTION_TRACE("acpi_ec_start"); | |
1188 | ||
1189 | if (!device) | |
1190 | return_VALUE(-EINVAL); | |
1191 | ||
1192 | ec = acpi_driver_data(device); | |
1193 | ||
1194 | if (!ec) | |
1195 | return_VALUE(-EINVAL); | |
1196 | ||
1197 | /* | |
1198 | * Get I/O port addresses. Convert to GAS format. | |
1199 | */ | |
45bea155 | 1200 | status = acpi_walk_resources(ec->common.handle, METHOD_NAME__CRS, |
50526df6 LB |
1201 | acpi_ec_io_ports, ec); |
1202 | if (ACPI_FAILURE(status) | |
1203 | || ec->common.command_addr.register_bit_width == 0) { | |
a6fc6720 | 1204 | ACPI_ERROR((AE_INFO, "Error getting I/O port addresses")); |
1da177e4 LT |
1205 | return_VALUE(-ENODEV); |
1206 | } | |
1207 | ||
45bea155 | 1208 | ec->common.status_addr = ec->common.command_addr; |
1da177e4 LT |
1209 | |
1210 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "gpe=0x%02x, ports=0x%2x,0x%2x\n", | |
50526df6 LB |
1211 | (u32) ec->common.gpe_bit, |
1212 | (u32) ec->common.command_addr.address, | |
1213 | (u32) ec->common.data_addr.address)); | |
1da177e4 LT |
1214 | |
1215 | /* | |
1216 | * Install GPE handler | |
1217 | */ | |
45bea155 | 1218 | status = acpi_install_gpe_handler(NULL, ec->common.gpe_bit, |
50526df6 LB |
1219 | ACPI_GPE_EDGE_TRIGGERED, |
1220 | &acpi_ec_gpe_handler, ec); | |
1da177e4 LT |
1221 | if (ACPI_FAILURE(status)) { |
1222 | return_VALUE(-ENODEV); | |
1223 | } | |
50526df6 LB |
1224 | acpi_set_gpe_type(NULL, ec->common.gpe_bit, ACPI_GPE_TYPE_RUNTIME); |
1225 | acpi_enable_gpe(NULL, ec->common.gpe_bit, ACPI_NOT_ISR); | |
1da177e4 | 1226 | |
50526df6 LB |
1227 | status = acpi_install_address_space_handler(ec->common.handle, |
1228 | ACPI_ADR_SPACE_EC, | |
1229 | &acpi_ec_space_handler, | |
1230 | &acpi_ec_space_setup, ec); | |
1da177e4 | 1231 | if (ACPI_FAILURE(status)) { |
50526df6 LB |
1232 | acpi_remove_gpe_handler(NULL, ec->common.gpe_bit, |
1233 | &acpi_ec_gpe_handler); | |
1da177e4 LT |
1234 | return_VALUE(-ENODEV); |
1235 | } | |
1236 | ||
1237 | return_VALUE(AE_OK); | |
1238 | } | |
1239 | ||
50526df6 | 1240 | static int acpi_ec_stop(struct acpi_device *device, int type) |
1da177e4 | 1241 | { |
50526df6 LB |
1242 | acpi_status status = AE_OK; |
1243 | union acpi_ec *ec = NULL; | |
1da177e4 LT |
1244 | |
1245 | ACPI_FUNCTION_TRACE("acpi_ec_stop"); | |
1246 | ||
1247 | if (!device) | |
1248 | return_VALUE(-EINVAL); | |
1249 | ||
1250 | ec = acpi_driver_data(device); | |
1251 | ||
45bea155 | 1252 | status = acpi_remove_address_space_handler(ec->common.handle, |
50526df6 LB |
1253 | ACPI_ADR_SPACE_EC, |
1254 | &acpi_ec_space_handler); | |
1da177e4 LT |
1255 | if (ACPI_FAILURE(status)) |
1256 | return_VALUE(-ENODEV); | |
1257 | ||
50526df6 LB |
1258 | status = |
1259 | acpi_remove_gpe_handler(NULL, ec->common.gpe_bit, | |
1260 | &acpi_ec_gpe_handler); | |
1da177e4 LT |
1261 | if (ACPI_FAILURE(status)) |
1262 | return_VALUE(-ENODEV); | |
1263 | ||
1264 | return_VALUE(0); | |
1265 | } | |
1266 | ||
1267 | static acpi_status __init | |
50526df6 LB |
1268 | acpi_fake_ecdt_callback(acpi_handle handle, |
1269 | u32 Level, void *context, void **retval) | |
1da177e4 | 1270 | { |
45bea155 | 1271 | |
02b28a33 LB |
1272 | if (acpi_ec_poll_mode) |
1273 | return acpi_fake_ecdt_poll_callback(handle, | |
50526df6 | 1274 | Level, context, retval); |
45bea155 | 1275 | else |
02b28a33 | 1276 | return acpi_fake_ecdt_intr_callback(handle, |
50526df6 | 1277 | Level, context, retval); |
45bea155 LY |
1278 | } |
1279 | ||
1280 | static acpi_status __init | |
02b28a33 | 1281 | acpi_fake_ecdt_poll_callback(acpi_handle handle, |
50526df6 | 1282 | u32 Level, void *context, void **retval) |
45bea155 | 1283 | { |
50526df6 | 1284 | acpi_status status; |
45bea155 LY |
1285 | |
1286 | status = acpi_walk_resources(handle, METHOD_NAME__CRS, | |
50526df6 | 1287 | acpi_ec_io_ports, ec_ecdt); |
45bea155 LY |
1288 | if (ACPI_FAILURE(status)) |
1289 | return status; | |
1290 | ec_ecdt->common.status_addr = ec_ecdt->common.command_addr; | |
1291 | ||
1292 | ec_ecdt->common.uid = -1; | |
1293 | acpi_evaluate_integer(handle, "_UID", NULL, &ec_ecdt->common.uid); | |
1294 | ||
50526df6 LB |
1295 | status = |
1296 | acpi_evaluate_integer(handle, "_GPE", NULL, | |
1297 | &ec_ecdt->common.gpe_bit); | |
45bea155 LY |
1298 | if (ACPI_FAILURE(status)) |
1299 | return status; | |
f9a6ee1a | 1300 | init_MUTEX(&ec_ecdt->poll.sem); |
45bea155 LY |
1301 | ec_ecdt->common.global_lock = TRUE; |
1302 | ec_ecdt->common.handle = handle; | |
1303 | ||
50526df6 LB |
1304 | printk(KERN_INFO PREFIX "GPE=0x%02x, ports=0x%2x, 0x%2x\n", |
1305 | (u32) ec_ecdt->common.gpe_bit, | |
1306 | (u32) ec_ecdt->common.command_addr.address, | |
1307 | (u32) ec_ecdt->common.data_addr.address); | |
45bea155 LY |
1308 | |
1309 | return AE_CTRL_TERMINATE; | |
1310 | } | |
1311 | ||
1312 | static acpi_status __init | |
02b28a33 | 1313 | acpi_fake_ecdt_intr_callback(acpi_handle handle, |
50526df6 | 1314 | u32 Level, void *context, void **retval) |
45bea155 | 1315 | { |
50526df6 | 1316 | acpi_status status; |
1da177e4 | 1317 | |
02b28a33 LB |
1318 | init_MUTEX(&ec_ecdt->intr.sem); |
1319 | init_waitqueue_head(&ec_ecdt->intr.wait); | |
1da177e4 | 1320 | status = acpi_walk_resources(handle, METHOD_NAME__CRS, |
50526df6 | 1321 | acpi_ec_io_ports, ec_ecdt); |
1da177e4 LT |
1322 | if (ACPI_FAILURE(status)) |
1323 | return status; | |
45bea155 | 1324 | ec_ecdt->common.status_addr = ec_ecdt->common.command_addr; |
1da177e4 | 1325 | |
45bea155 LY |
1326 | ec_ecdt->common.uid = -1; |
1327 | acpi_evaluate_integer(handle, "_UID", NULL, &ec_ecdt->common.uid); | |
1da177e4 | 1328 | |
50526df6 LB |
1329 | status = |
1330 | acpi_evaluate_integer(handle, "_GPE", NULL, | |
1331 | &ec_ecdt->common.gpe_bit); | |
1da177e4 LT |
1332 | if (ACPI_FAILURE(status)) |
1333 | return status; | |
45bea155 LY |
1334 | ec_ecdt->common.global_lock = TRUE; |
1335 | ec_ecdt->common.handle = handle; | |
1da177e4 | 1336 | |
50526df6 LB |
1337 | printk(KERN_INFO PREFIX "GPE=0x%02x, ports=0x%2x, 0x%2x\n", |
1338 | (u32) ec_ecdt->common.gpe_bit, | |
1339 | (u32) ec_ecdt->common.command_addr.address, | |
1340 | (u32) ec_ecdt->common.data_addr.address); | |
1da177e4 LT |
1341 | |
1342 | return AE_CTRL_TERMINATE; | |
1343 | } | |
1344 | ||
1345 | /* | |
1346 | * Some BIOS (such as some from Gateway laptops) access EC region very early | |
1347 | * such as in BAT0._INI or EC._INI before an EC device is found and | |
1348 | * do not provide an ECDT. According to ACPI spec, ECDT isn't mandatorily | |
1349 | * required, but if EC regison is accessed early, it is required. | |
1350 | * The routine tries to workaround the BIOS bug by pre-scan EC device | |
1351 | * It assumes that _CRS, _HID, _GPE, _UID methods of EC don't touch any | |
1352 | * op region (since _REG isn't invoked yet). The assumption is true for | |
1353 | * all systems found. | |
1354 | */ | |
50526df6 | 1355 | static int __init acpi_ec_fake_ecdt(void) |
1da177e4 | 1356 | { |
50526df6 LB |
1357 | acpi_status status; |
1358 | int ret = 0; | |
1da177e4 LT |
1359 | |
1360 | printk(KERN_INFO PREFIX "Try to make an fake ECDT\n"); | |
1361 | ||
45bea155 | 1362 | ec_ecdt = kmalloc(sizeof(union acpi_ec), GFP_KERNEL); |
1da177e4 LT |
1363 | if (!ec_ecdt) { |
1364 | ret = -ENOMEM; | |
1365 | goto error; | |
1366 | } | |
45bea155 | 1367 | memset(ec_ecdt, 0, sizeof(union acpi_ec)); |
1da177e4 | 1368 | |
50526df6 LB |
1369 | status = acpi_get_devices(ACPI_EC_HID, |
1370 | acpi_fake_ecdt_callback, NULL, NULL); | |
1da177e4 LT |
1371 | if (ACPI_FAILURE(status)) { |
1372 | kfree(ec_ecdt); | |
1373 | ec_ecdt = NULL; | |
1374 | ret = -ENODEV; | |
1375 | goto error; | |
1376 | } | |
1377 | return 0; | |
50526df6 | 1378 | error: |
1da177e4 LT |
1379 | printk(KERN_ERR PREFIX "Can't make an fake ECDT\n"); |
1380 | return ret; | |
1381 | } | |
1382 | ||
50526df6 | 1383 | static int __init acpi_ec_get_real_ecdt(void) |
45bea155 | 1384 | { |
02b28a33 LB |
1385 | if (acpi_ec_poll_mode) |
1386 | return acpi_ec_poll_get_real_ecdt(); | |
45bea155 | 1387 | else |
02b28a33 | 1388 | return acpi_ec_intr_get_real_ecdt(); |
45bea155 LY |
1389 | } |
1390 | ||
02b28a33 | 1391 | static int __init acpi_ec_poll_get_real_ecdt(void) |
45bea155 | 1392 | { |
50526df6 LB |
1393 | acpi_status status; |
1394 | struct acpi_table_ecdt *ecdt_ptr; | |
45bea155 | 1395 | |
50526df6 LB |
1396 | status = acpi_get_firmware_table("ECDT", 1, ACPI_LOGICAL_ADDRESSING, |
1397 | (struct acpi_table_header **) | |
1398 | &ecdt_ptr); | |
45bea155 LY |
1399 | if (ACPI_FAILURE(status)) |
1400 | return -ENODEV; | |
1401 | ||
1402 | printk(KERN_INFO PREFIX "Found ECDT\n"); | |
1403 | ||
1404 | /* | |
1405 | * Generate a temporary ec context to use until the namespace is scanned | |
1406 | */ | |
1407 | ec_ecdt = kmalloc(sizeof(union acpi_ec), GFP_KERNEL); | |
1408 | if (!ec_ecdt) | |
1409 | return -ENOMEM; | |
1410 | memset(ec_ecdt, 0, sizeof(union acpi_ec)); | |
1411 | ||
1412 | ec_ecdt->common.command_addr = ecdt_ptr->ec_control; | |
1413 | ec_ecdt->common.status_addr = ecdt_ptr->ec_control; | |
1414 | ec_ecdt->common.data_addr = ecdt_ptr->ec_data; | |
1415 | ec_ecdt->common.gpe_bit = ecdt_ptr->gpe_bit; | |
f9a6ee1a | 1416 | init_MUTEX(&ec_ecdt->poll.sem); |
45bea155 LY |
1417 | /* use the GL just to be safe */ |
1418 | ec_ecdt->common.global_lock = TRUE; | |
1419 | ec_ecdt->common.uid = ecdt_ptr->uid; | |
1420 | ||
50526df6 LB |
1421 | status = |
1422 | acpi_get_handle(NULL, ecdt_ptr->ec_id, &ec_ecdt->common.handle); | |
45bea155 LY |
1423 | if (ACPI_FAILURE(status)) { |
1424 | goto error; | |
1425 | } | |
1426 | ||
1427 | return 0; | |
50526df6 | 1428 | error: |
45bea155 LY |
1429 | printk(KERN_ERR PREFIX "Could not use ECDT\n"); |
1430 | kfree(ec_ecdt); | |
1431 | ec_ecdt = NULL; | |
1432 | ||
1433 | return -ENODEV; | |
1434 | } | |
1435 | ||
02b28a33 | 1436 | static int __init acpi_ec_intr_get_real_ecdt(void) |
1da177e4 | 1437 | { |
50526df6 LB |
1438 | acpi_status status; |
1439 | struct acpi_table_ecdt *ecdt_ptr; | |
1da177e4 | 1440 | |
451566f4 | 1441 | status = acpi_get_firmware_table("ECDT", 1, ACPI_LOGICAL_ADDRESSING, |
50526df6 LB |
1442 | (struct acpi_table_header **) |
1443 | &ecdt_ptr); | |
1da177e4 LT |
1444 | if (ACPI_FAILURE(status)) |
1445 | return -ENODEV; | |
1446 | ||
1447 | printk(KERN_INFO PREFIX "Found ECDT\n"); | |
1448 | ||
1449 | /* | |
1450 | * Generate a temporary ec context to use until the namespace is scanned | |
1451 | */ | |
45bea155 | 1452 | ec_ecdt = kmalloc(sizeof(union acpi_ec), GFP_KERNEL); |
1da177e4 LT |
1453 | if (!ec_ecdt) |
1454 | return -ENOMEM; | |
45bea155 LY |
1455 | memset(ec_ecdt, 0, sizeof(union acpi_ec)); |
1456 | ||
02b28a33 LB |
1457 | init_MUTEX(&ec_ecdt->intr.sem); |
1458 | init_waitqueue_head(&ec_ecdt->intr.wait); | |
45bea155 LY |
1459 | ec_ecdt->common.command_addr = ecdt_ptr->ec_control; |
1460 | ec_ecdt->common.status_addr = ecdt_ptr->ec_control; | |
1461 | ec_ecdt->common.data_addr = ecdt_ptr->ec_data; | |
1462 | ec_ecdt->common.gpe_bit = ecdt_ptr->gpe_bit; | |
1da177e4 | 1463 | /* use the GL just to be safe */ |
45bea155 LY |
1464 | ec_ecdt->common.global_lock = TRUE; |
1465 | ec_ecdt->common.uid = ecdt_ptr->uid; | |
1da177e4 | 1466 | |
50526df6 LB |
1467 | status = |
1468 | acpi_get_handle(NULL, ecdt_ptr->ec_id, &ec_ecdt->common.handle); | |
1da177e4 LT |
1469 | if (ACPI_FAILURE(status)) { |
1470 | goto error; | |
1471 | } | |
1472 | ||
1473 | return 0; | |
50526df6 | 1474 | error: |
1da177e4 LT |
1475 | printk(KERN_ERR PREFIX "Could not use ECDT\n"); |
1476 | kfree(ec_ecdt); | |
1477 | ec_ecdt = NULL; | |
1478 | ||
1479 | return -ENODEV; | |
1480 | } | |
1481 | ||
1482 | static int __initdata acpi_fake_ecdt_enabled; | |
50526df6 | 1483 | int __init acpi_ec_ecdt_probe(void) |
1da177e4 | 1484 | { |
50526df6 LB |
1485 | acpi_status status; |
1486 | int ret; | |
1da177e4 LT |
1487 | |
1488 | ret = acpi_ec_get_real_ecdt(); | |
1489 | /* Try to make a fake ECDT */ | |
1490 | if (ret && acpi_fake_ecdt_enabled) { | |
1491 | ret = acpi_ec_fake_ecdt(); | |
1492 | } | |
1493 | ||
1494 | if (ret) | |
1495 | return 0; | |
1496 | ||
1497 | /* | |
1498 | * Install GPE handler | |
1499 | */ | |
45bea155 | 1500 | status = acpi_install_gpe_handler(NULL, ec_ecdt->common.gpe_bit, |
50526df6 LB |
1501 | ACPI_GPE_EDGE_TRIGGERED, |
1502 | &acpi_ec_gpe_handler, ec_ecdt); | |
1da177e4 LT |
1503 | if (ACPI_FAILURE(status)) { |
1504 | goto error; | |
1505 | } | |
50526df6 LB |
1506 | acpi_set_gpe_type(NULL, ec_ecdt->common.gpe_bit, ACPI_GPE_TYPE_RUNTIME); |
1507 | acpi_enable_gpe(NULL, ec_ecdt->common.gpe_bit, ACPI_NOT_ISR); | |
1508 | ||
1509 | status = acpi_install_address_space_handler(ACPI_ROOT_OBJECT, | |
1510 | ACPI_ADR_SPACE_EC, | |
1511 | &acpi_ec_space_handler, | |
1512 | &acpi_ec_space_setup, | |
1513 | ec_ecdt); | |
1da177e4 | 1514 | if (ACPI_FAILURE(status)) { |
45bea155 | 1515 | acpi_remove_gpe_handler(NULL, ec_ecdt->common.gpe_bit, |
50526df6 | 1516 | &acpi_ec_gpe_handler); |
1da177e4 LT |
1517 | goto error; |
1518 | } | |
1519 | ||
1520 | return 0; | |
1521 | ||
50526df6 | 1522 | error: |
1da177e4 LT |
1523 | printk(KERN_ERR PREFIX "Could not use ECDT\n"); |
1524 | kfree(ec_ecdt); | |
1525 | ec_ecdt = NULL; | |
1526 | ||
1527 | return -ENODEV; | |
1528 | } | |
1529 | ||
50526df6 | 1530 | static int __init acpi_ec_init(void) |
1da177e4 | 1531 | { |
50526df6 | 1532 | int result = 0; |
1da177e4 LT |
1533 | |
1534 | ACPI_FUNCTION_TRACE("acpi_ec_init"); | |
1535 | ||
1536 | if (acpi_disabled) | |
1537 | return_VALUE(0); | |
1538 | ||
1539 | acpi_ec_dir = proc_mkdir(ACPI_EC_CLASS, acpi_root_dir); | |
1540 | if (!acpi_ec_dir) | |
1541 | return_VALUE(-ENODEV); | |
1542 | ||
1543 | /* Now register the driver for the EC */ | |
1544 | result = acpi_bus_register_driver(&acpi_ec_driver); | |
1545 | if (result < 0) { | |
1546 | remove_proc_entry(ACPI_EC_CLASS, acpi_root_dir); | |
1547 | return_VALUE(-ENODEV); | |
1548 | } | |
1549 | ||
1550 | return_VALUE(result); | |
1551 | } | |
1552 | ||
1553 | subsys_initcall(acpi_ec_init); | |
1554 | ||
1555 | /* EC driver currently not unloadable */ | |
1556 | #if 0 | |
50526df6 | 1557 | static void __exit acpi_ec_exit(void) |
1da177e4 LT |
1558 | { |
1559 | ACPI_FUNCTION_TRACE("acpi_ec_exit"); | |
1560 | ||
1561 | acpi_bus_unregister_driver(&acpi_ec_driver); | |
1562 | ||
1563 | remove_proc_entry(ACPI_EC_CLASS, acpi_root_dir); | |
1564 | ||
1565 | return_VOID; | |
1566 | } | |
50526df6 | 1567 | #endif /* 0 */ |
1da177e4 LT |
1568 | |
1569 | static int __init acpi_fake_ecdt_setup(char *str) | |
1570 | { | |
1571 | acpi_fake_ecdt_enabled = 1; | |
9b41046c | 1572 | return 1; |
1da177e4 | 1573 | } |
7b15f5e7 | 1574 | |
1da177e4 | 1575 | __setup("acpi_fake_ecdt", acpi_fake_ecdt_setup); |
02b28a33 | 1576 | static int __init acpi_ec_set_intr_mode(char *str) |
45bea155 | 1577 | { |
02b28a33 | 1578 | int intr; |
7b15f5e7 | 1579 | |
02b28a33 | 1580 | if (!get_option(&str, &intr)) |
7b15f5e7 LY |
1581 | return 0; |
1582 | ||
02b28a33 LB |
1583 | if (intr) { |
1584 | acpi_ec_poll_mode = EC_INTR; | |
1585 | acpi_ec_driver.ops.add = acpi_ec_intr_add; | |
7b15f5e7 | 1586 | } else { |
02b28a33 LB |
1587 | acpi_ec_poll_mode = EC_POLL; |
1588 | acpi_ec_driver.ops.add = acpi_ec_poll_add; | |
7b15f5e7 | 1589 | } |
02b28a33 | 1590 | printk(KERN_INFO PREFIX "EC %s mode.\n", intr ? "interrupt" : "polling"); |
9b41046c | 1591 | return 1; |
45bea155 | 1592 | } |
50526df6 | 1593 | |
53f11d4f | 1594 | __setup("ec_intr=", acpi_ec_set_intr_mode); |