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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; | |
119 | spinlock_t lock; | |
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: |
1e8df53c | 282 | printk(KERN_WARNING PREFIX "Error in acpi_ec_wait\n"); |
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: |
1e8df53c | 303 | printk(KERN_WARNING PREFIX "leave burst_mode:error\n"); |
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; | |
326 | unsigned long flags = 0; | |
327 | u32 glk = 0; | |
45bea155 LY |
328 | |
329 | ACPI_FUNCTION_TRACE("acpi_ec_read"); | |
330 | ||
331 | if (!ec || !data) | |
332 | return_VALUE(-EINVAL); | |
333 | ||
334 | *data = 0; | |
335 | ||
336 | if (ec->common.global_lock) { | |
337 | status = acpi_acquire_global_lock(ACPI_EC_UDELAY_GLK, &glk); | |
338 | if (ACPI_FAILURE(status)) | |
339 | return_VALUE(-ENODEV); | |
340 | } | |
341 | ||
02b28a33 | 342 | spin_lock_irqsave(&ec->poll.lock, flags); |
45bea155 | 343 | |
50526df6 LB |
344 | acpi_hw_low_level_write(8, ACPI_EC_COMMAND_READ, |
345 | &ec->common.command_addr); | |
45bea155 LY |
346 | result = acpi_ec_wait(ec, ACPI_EC_EVENT_IBE); |
347 | if (result) | |
348 | goto end; | |
349 | ||
350 | acpi_hw_low_level_write(8, address, &ec->common.data_addr); | |
351 | result = acpi_ec_wait(ec, ACPI_EC_EVENT_OBF); | |
352 | if (result) | |
353 | goto end; | |
354 | ||
355 | acpi_hw_low_level_read(8, data, &ec->common.data_addr); | |
356 | ||
357 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Read [%02x] from address [%02x]\n", | |
50526df6 LB |
358 | *data, address)); |
359 | ||
360 | end: | |
02b28a33 | 361 | spin_unlock_irqrestore(&ec->poll.lock, flags); |
45bea155 LY |
362 | |
363 | if (ec->common.global_lock) | |
364 | acpi_release_global_lock(glk); | |
365 | ||
366 | return_VALUE(result); | |
367 | } | |
368 | ||
02b28a33 | 369 | static int acpi_ec_poll_write(union acpi_ec *ec, u8 address, u8 data) |
45bea155 | 370 | { |
50526df6 LB |
371 | int result = 0; |
372 | acpi_status status = AE_OK; | |
373 | unsigned long flags = 0; | |
374 | u32 glk = 0; | |
45bea155 LY |
375 | |
376 | ACPI_FUNCTION_TRACE("acpi_ec_write"); | |
377 | ||
378 | if (!ec) | |
379 | return_VALUE(-EINVAL); | |
380 | ||
381 | if (ec->common.global_lock) { | |
382 | status = acpi_acquire_global_lock(ACPI_EC_UDELAY_GLK, &glk); | |
383 | if (ACPI_FAILURE(status)) | |
384 | return_VALUE(-ENODEV); | |
385 | } | |
386 | ||
02b28a33 | 387 | spin_lock_irqsave(&ec->poll.lock, flags); |
45bea155 | 388 | |
50526df6 LB |
389 | acpi_hw_low_level_write(8, ACPI_EC_COMMAND_WRITE, |
390 | &ec->common.command_addr); | |
45bea155 LY |
391 | result = acpi_ec_wait(ec, ACPI_EC_EVENT_IBE); |
392 | if (result) | |
393 | goto end; | |
394 | ||
395 | acpi_hw_low_level_write(8, address, &ec->common.data_addr); | |
396 | result = acpi_ec_wait(ec, ACPI_EC_EVENT_IBE); | |
397 | if (result) | |
398 | goto end; | |
399 | ||
400 | acpi_hw_low_level_write(8, data, &ec->common.data_addr); | |
401 | result = acpi_ec_wait(ec, ACPI_EC_EVENT_IBE); | |
402 | if (result) | |
403 | goto end; | |
404 | ||
405 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Wrote [%02x] to address [%02x]\n", | |
50526df6 | 406 | data, address)); |
45bea155 | 407 | |
50526df6 | 408 | end: |
02b28a33 | 409 | spin_unlock_irqrestore(&ec->poll.lock, flags); |
45bea155 LY |
410 | |
411 | if (ec->common.global_lock) | |
412 | acpi_release_global_lock(glk); | |
413 | ||
414 | return_VALUE(result); | |
415 | } | |
416 | ||
02b28a33 | 417 | static int acpi_ec_intr_read(union acpi_ec *ec, u8 address, u32 * data) |
1da177e4 | 418 | { |
50526df6 LB |
419 | int status = 0; |
420 | u32 glk; | |
1da177e4 LT |
421 | |
422 | ACPI_FUNCTION_TRACE("acpi_ec_read"); | |
423 | ||
424 | if (!ec || !data) | |
425 | return_VALUE(-EINVAL); | |
426 | ||
427 | *data = 0; | |
428 | ||
45bea155 | 429 | if (ec->common.global_lock) { |
1da177e4 LT |
430 | status = acpi_acquire_global_lock(ACPI_EC_UDELAY_GLK, &glk); |
431 | if (ACPI_FAILURE(status)) | |
432 | return_VALUE(-ENODEV); | |
433 | } | |
451566f4 DT |
434 | |
435 | WARN_ON(in_interrupt()); | |
02b28a33 | 436 | down(&ec->intr.sem); |
451566f4 | 437 | |
716e084e LY |
438 | status = acpi_ec_wait(ec, ACPI_EC_EVENT_IBE); |
439 | if (status) { | |
1e8df53c | 440 | printk(KERN_DEBUG PREFIX "read EC, IB not empty\n"); |
451566f4 | 441 | goto end; |
716e084e | 442 | } |
50526df6 LB |
443 | acpi_hw_low_level_write(8, ACPI_EC_COMMAND_READ, |
444 | &ec->common.command_addr); | |
451566f4 | 445 | status = acpi_ec_wait(ec, ACPI_EC_EVENT_IBE); |
451566f4 | 446 | if (status) { |
1e8df53c | 447 | printk(KERN_DEBUG PREFIX "read EC, IB not empty\n"); |
451566f4 | 448 | } |
1da177e4 | 449 | |
45bea155 | 450 | acpi_hw_low_level_write(8, address, &ec->common.data_addr); |
50526df6 LB |
451 | status = acpi_ec_wait(ec, ACPI_EC_EVENT_OBF); |
452 | if (status) { | |
1e8df53c | 453 | printk(KERN_DEBUG PREFIX "read EC, OB not full\n"); |
1da177e4 | 454 | goto end; |
451566f4 | 455 | } |
45bea155 | 456 | acpi_hw_low_level_read(8, data, &ec->common.data_addr); |
1da177e4 | 457 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Read [%02x] from address [%02x]\n", |
50526df6 LB |
458 | *data, address)); |
459 | ||
460 | end: | |
02b28a33 | 461 | up(&ec->intr.sem); |
1da177e4 | 462 | |
45bea155 | 463 | if (ec->common.global_lock) |
1da177e4 LT |
464 | acpi_release_global_lock(glk); |
465 | ||
451566f4 | 466 | return_VALUE(status); |
1da177e4 LT |
467 | } |
468 | ||
02b28a33 | 469 | static int acpi_ec_intr_write(union acpi_ec *ec, u8 address, u8 data) |
1da177e4 | 470 | { |
50526df6 LB |
471 | int status = 0; |
472 | u32 glk; | |
1da177e4 LT |
473 | |
474 | ACPI_FUNCTION_TRACE("acpi_ec_write"); | |
475 | ||
476 | if (!ec) | |
477 | return_VALUE(-EINVAL); | |
716e084e | 478 | |
45bea155 | 479 | if (ec->common.global_lock) { |
1da177e4 LT |
480 | status = acpi_acquire_global_lock(ACPI_EC_UDELAY_GLK, &glk); |
481 | if (ACPI_FAILURE(status)) | |
482 | return_VALUE(-ENODEV); | |
483 | } | |
484 | ||
451566f4 | 485 | WARN_ON(in_interrupt()); |
02b28a33 | 486 | down(&ec->intr.sem); |
451566f4 | 487 | |
716e084e | 488 | status = acpi_ec_wait(ec, ACPI_EC_EVENT_IBE); |
50526df6 | 489 | if (status) { |
1e8df53c | 490 | printk(KERN_DEBUG PREFIX "write EC, IB not empty\n"); |
451566f4 | 491 | } |
50526df6 LB |
492 | acpi_hw_low_level_write(8, ACPI_EC_COMMAND_WRITE, |
493 | &ec->common.command_addr); | |
451566f4 | 494 | status = acpi_ec_wait(ec, ACPI_EC_EVENT_IBE); |
716e084e | 495 | if (status) { |
1e8df53c | 496 | printk(KERN_DEBUG PREFIX "write EC, IB not empty\n"); |
451566f4 | 497 | } |
1da177e4 | 498 | |
45bea155 | 499 | acpi_hw_low_level_write(8, address, &ec->common.data_addr); |
451566f4 | 500 | status = acpi_ec_wait(ec, ACPI_EC_EVENT_IBE); |
50526df6 | 501 | if (status) { |
1e8df53c | 502 | printk(KERN_DEBUG PREFIX "write EC, IB not empty\n"); |
451566f4 | 503 | } |
1da177e4 | 504 | |
45bea155 | 505 | acpi_hw_low_level_write(8, data, &ec->common.data_addr); |
1da177e4 LT |
506 | |
507 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Wrote [%02x] to address [%02x]\n", | |
50526df6 | 508 | data, address)); |
1da177e4 | 509 | |
02b28a33 | 510 | up(&ec->intr.sem); |
1da177e4 | 511 | |
45bea155 | 512 | if (ec->common.global_lock) |
1da177e4 LT |
513 | acpi_release_global_lock(glk); |
514 | ||
451566f4 | 515 | return_VALUE(status); |
1da177e4 LT |
516 | } |
517 | ||
518 | /* | |
519 | * Externally callable EC access functions. For now, assume 1 EC only | |
520 | */ | |
50526df6 | 521 | int ec_read(u8 addr, u8 * val) |
1da177e4 | 522 | { |
45bea155 | 523 | union acpi_ec *ec; |
1da177e4 LT |
524 | int err; |
525 | u32 temp_data; | |
526 | ||
527 | if (!first_ec) | |
528 | return -ENODEV; | |
529 | ||
530 | ec = acpi_driver_data(first_ec); | |
531 | ||
532 | err = acpi_ec_read(ec, addr, &temp_data); | |
533 | ||
534 | if (!err) { | |
535 | *val = temp_data; | |
536 | return 0; | |
50526df6 | 537 | } else |
1da177e4 LT |
538 | return err; |
539 | } | |
50526df6 | 540 | |
1da177e4 LT |
541 | EXPORT_SYMBOL(ec_read); |
542 | ||
50526df6 | 543 | int ec_write(u8 addr, u8 val) |
1da177e4 | 544 | { |
45bea155 | 545 | union acpi_ec *ec; |
1da177e4 LT |
546 | int err; |
547 | ||
548 | if (!first_ec) | |
549 | return -ENODEV; | |
550 | ||
551 | ec = acpi_driver_data(first_ec); | |
552 | ||
553 | err = acpi_ec_write(ec, addr, val); | |
554 | ||
555 | return err; | |
556 | } | |
50526df6 | 557 | |
1da177e4 LT |
558 | EXPORT_SYMBOL(ec_write); |
559 | ||
50526df6 | 560 | static int acpi_ec_query(union acpi_ec *ec, u32 * data) |
45bea155 | 561 | { |
02b28a33 LB |
562 | if (acpi_ec_poll_mode) |
563 | return acpi_ec_poll_query(ec, data); | |
45bea155 | 564 | else |
02b28a33 | 565 | return acpi_ec_intr_query(ec, data); |
45bea155 | 566 | } |
02b28a33 | 567 | static int acpi_ec_poll_query(union acpi_ec *ec, u32 * data) |
45bea155 | 568 | { |
50526df6 LB |
569 | int result = 0; |
570 | acpi_status status = AE_OK; | |
571 | unsigned long flags = 0; | |
572 | u32 glk = 0; | |
45bea155 LY |
573 | |
574 | ACPI_FUNCTION_TRACE("acpi_ec_query"); | |
575 | ||
576 | if (!ec || !data) | |
577 | return_VALUE(-EINVAL); | |
578 | ||
579 | *data = 0; | |
580 | ||
581 | if (ec->common.global_lock) { | |
582 | status = acpi_acquire_global_lock(ACPI_EC_UDELAY_GLK, &glk); | |
583 | if (ACPI_FAILURE(status)) | |
584 | return_VALUE(-ENODEV); | |
585 | } | |
586 | ||
587 | /* | |
588 | * Query the EC to find out which _Qxx method we need to evaluate. | |
589 | * Note that successful completion of the query causes the ACPI_EC_SCI | |
590 | * bit to be cleared (and thus clearing the interrupt source). | |
591 | */ | |
02b28a33 | 592 | spin_lock_irqsave(&ec->poll.lock, flags); |
45bea155 | 593 | |
50526df6 LB |
594 | acpi_hw_low_level_write(8, ACPI_EC_COMMAND_QUERY, |
595 | &ec->common.command_addr); | |
45bea155 LY |
596 | result = acpi_ec_wait(ec, ACPI_EC_EVENT_OBF); |
597 | if (result) | |
598 | goto end; | |
599 | ||
600 | acpi_hw_low_level_read(8, data, &ec->common.data_addr); | |
601 | if (!*data) | |
602 | result = -ENODATA; | |
603 | ||
50526df6 | 604 | end: |
02b28a33 | 605 | spin_unlock_irqrestore(&ec->poll.lock, flags); |
45bea155 LY |
606 | |
607 | if (ec->common.global_lock) | |
608 | acpi_release_global_lock(glk); | |
609 | ||
610 | return_VALUE(result); | |
611 | } | |
02b28a33 | 612 | static int acpi_ec_intr_query(union acpi_ec *ec, u32 * data) |
1da177e4 | 613 | { |
50526df6 LB |
614 | int status = 0; |
615 | u32 glk; | |
1da177e4 LT |
616 | |
617 | ACPI_FUNCTION_TRACE("acpi_ec_query"); | |
618 | ||
619 | if (!ec || !data) | |
620 | return_VALUE(-EINVAL); | |
1da177e4 LT |
621 | *data = 0; |
622 | ||
45bea155 | 623 | if (ec->common.global_lock) { |
1da177e4 LT |
624 | status = acpi_acquire_global_lock(ACPI_EC_UDELAY_GLK, &glk); |
625 | if (ACPI_FAILURE(status)) | |
626 | return_VALUE(-ENODEV); | |
627 | } | |
628 | ||
02b28a33 | 629 | down(&ec->intr.sem); |
716e084e LY |
630 | |
631 | status = acpi_ec_wait(ec, ACPI_EC_EVENT_IBE); | |
632 | if (status) { | |
1e8df53c | 633 | printk(KERN_DEBUG PREFIX "query EC, IB not empty\n"); |
451566f4 | 634 | goto end; |
716e084e | 635 | } |
1da177e4 LT |
636 | /* |
637 | * Query the EC to find out which _Qxx method we need to evaluate. | |
638 | * Note that successful completion of the query causes the ACPI_EC_SCI | |
639 | * bit to be cleared (and thus clearing the interrupt source). | |
640 | */ | |
50526df6 LB |
641 | acpi_hw_low_level_write(8, ACPI_EC_COMMAND_QUERY, |
642 | &ec->common.command_addr); | |
451566f4 | 643 | status = acpi_ec_wait(ec, ACPI_EC_EVENT_OBF); |
50526df6 | 644 | if (status) { |
1e8df53c | 645 | printk(KERN_DEBUG PREFIX "query EC, OB not full\n"); |
1da177e4 | 646 | goto end; |
451566f4 DT |
647 | } |
648 | ||
45bea155 | 649 | acpi_hw_low_level_read(8, data, &ec->common.data_addr); |
1da177e4 | 650 | if (!*data) |
451566f4 | 651 | status = -ENODATA; |
1da177e4 | 652 | |
50526df6 | 653 | end: |
02b28a33 | 654 | up(&ec->intr.sem); |
1da177e4 | 655 | |
45bea155 | 656 | if (ec->common.global_lock) |
1da177e4 LT |
657 | acpi_release_global_lock(glk); |
658 | ||
451566f4 | 659 | return_VALUE(status); |
1da177e4 LT |
660 | } |
661 | ||
1da177e4 LT |
662 | /* -------------------------------------------------------------------------- |
663 | Event Management | |
664 | -------------------------------------------------------------------------- */ | |
665 | ||
45bea155 | 666 | union acpi_ec_query_data { |
50526df6 LB |
667 | acpi_handle handle; |
668 | u8 data; | |
1da177e4 LT |
669 | }; |
670 | ||
50526df6 | 671 | static void acpi_ec_gpe_query(void *ec_cxt) |
1da177e4 | 672 | { |
02b28a33 LB |
673 | if (acpi_ec_poll_mode) |
674 | acpi_ec_gpe_poll_query(ec_cxt); | |
45bea155 | 675 | else |
02b28a33 | 676 | acpi_ec_gpe_intr_query(ec_cxt); |
45bea155 LY |
677 | } |
678 | ||
02b28a33 | 679 | static void acpi_ec_gpe_poll_query(void *ec_cxt) |
45bea155 | 680 | { |
50526df6 LB |
681 | union acpi_ec *ec = (union acpi_ec *)ec_cxt; |
682 | u32 value = 0; | |
683 | unsigned long flags = 0; | |
684 | static char object_name[5] = { '_', 'Q', '0', '0', '\0' }; | |
685 | const char hex[] = { '0', '1', '2', '3', '4', '5', '6', '7', | |
686 | '8', '9', 'A', 'B', 'C', 'D', 'E', 'F' | |
687 | }; | |
45bea155 LY |
688 | |
689 | ACPI_FUNCTION_TRACE("acpi_ec_gpe_query"); | |
690 | ||
691 | if (!ec_cxt) | |
692 | goto end; | |
693 | ||
02b28a33 | 694 | spin_lock_irqsave(&ec->poll.lock, flags); |
45bea155 | 695 | acpi_hw_low_level_read(8, &value, &ec->common.command_addr); |
02b28a33 | 696 | spin_unlock_irqrestore(&ec->poll.lock, flags); |
45bea155 LY |
697 | |
698 | /* TBD: Implement asynch events! | |
699 | * NOTE: All we care about are EC-SCI's. Other EC events are | |
700 | * handled via polling (yuck!). This is because some systems | |
701 | * treat EC-SCIs as level (versus EDGE!) triggered, preventing | |
702 | * a purely interrupt-driven approach (grumble, grumble). | |
703 | */ | |
704 | if (!(value & ACPI_EC_FLAG_SCI)) | |
705 | goto end; | |
706 | ||
707 | if (acpi_ec_query(ec, &value)) | |
708 | goto end; | |
709 | ||
710 | object_name[2] = hex[((value >> 4) & 0x0F)]; | |
711 | object_name[3] = hex[(value & 0x0F)]; | |
712 | ||
713 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Evaluating %s\n", object_name)); | |
714 | ||
715 | acpi_evaluate_object(ec->common.handle, object_name, NULL, NULL); | |
716 | ||
50526df6 | 717 | end: |
45bea155 LY |
718 | acpi_enable_gpe(NULL, ec->common.gpe_bit, ACPI_NOT_ISR); |
719 | } | |
02b28a33 | 720 | static void acpi_ec_gpe_intr_query(void *ec_cxt) |
45bea155 | 721 | { |
50526df6 LB |
722 | union acpi_ec *ec = (union acpi_ec *)ec_cxt; |
723 | u32 value; | |
724 | int result = -ENODATA; | |
725 | static char object_name[5] = { '_', 'Q', '0', '0', '\0' }; | |
726 | const char hex[] = { '0', '1', '2', '3', '4', '5', '6', '7', | |
727 | '8', '9', 'A', 'B', 'C', 'D', 'E', 'F' | |
728 | }; | |
1da177e4 LT |
729 | |
730 | ACPI_FUNCTION_TRACE("acpi_ec_gpe_query"); | |
731 | ||
451566f4 DT |
732 | if (acpi_ec_read_status(ec) & ACPI_EC_FLAG_SCI) |
733 | result = acpi_ec_query(ec, &value); | |
1da177e4 | 734 | |
451566f4 | 735 | if (result) |
1da177e4 LT |
736 | goto end; |
737 | ||
1da177e4 LT |
738 | object_name[2] = hex[((value >> 4) & 0x0F)]; |
739 | object_name[3] = hex[(value & 0x0F)]; | |
740 | ||
741 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Evaluating %s\n", object_name)); | |
742 | ||
45bea155 | 743 | acpi_evaluate_object(ec->common.handle, object_name, NULL, NULL); |
50526df6 | 744 | end: |
02b28a33 | 745 | atomic_dec(&ec->intr.pending_gpe); |
451566f4 | 746 | return; |
1da177e4 LT |
747 | } |
748 | ||
50526df6 | 749 | static u32 acpi_ec_gpe_handler(void *data) |
45bea155 | 750 | { |
02b28a33 LB |
751 | if (acpi_ec_poll_mode) |
752 | return acpi_ec_gpe_poll_handler(data); | |
45bea155 | 753 | else |
02b28a33 | 754 | return acpi_ec_gpe_intr_handler(data); |
45bea155 | 755 | } |
02b28a33 | 756 | static u32 acpi_ec_gpe_poll_handler(void *data) |
45bea155 | 757 | { |
50526df6 LB |
758 | acpi_status status = AE_OK; |
759 | union acpi_ec *ec = (union acpi_ec *)data; | |
45bea155 LY |
760 | |
761 | if (!ec) | |
762 | return ACPI_INTERRUPT_NOT_HANDLED; | |
763 | ||
764 | acpi_disable_gpe(NULL, ec->common.gpe_bit, ACPI_ISR); | |
765 | ||
766 | status = acpi_os_queue_for_execution(OSD_PRIORITY_GPE, | |
50526df6 | 767 | acpi_ec_gpe_query, ec); |
45bea155 LY |
768 | |
769 | if (status == AE_OK) | |
770 | return ACPI_INTERRUPT_HANDLED; | |
771 | else | |
772 | return ACPI_INTERRUPT_NOT_HANDLED; | |
773 | } | |
02b28a33 | 774 | static u32 acpi_ec_gpe_intr_handler(void *data) |
1da177e4 | 775 | { |
50526df6 LB |
776 | acpi_status status = AE_OK; |
777 | u32 value; | |
778 | union acpi_ec *ec = (union acpi_ec *)data; | |
1da177e4 LT |
779 | |
780 | if (!ec) | |
781 | return ACPI_INTERRUPT_NOT_HANDLED; | |
782 | ||
716e084e | 783 | acpi_clear_gpe(NULL, ec->common.gpe_bit, ACPI_ISR); |
451566f4 | 784 | value = acpi_ec_read_status(ec); |
1da177e4 | 785 | |
02b28a33 | 786 | switch (ec->intr.expect_event) { |
716e084e LY |
787 | case ACPI_EC_EVENT_OBF: |
788 | if (!(value & ACPI_EC_FLAG_OBF)) | |
789 | break; | |
790 | case ACPI_EC_EVENT_IBE: | |
791 | if ((value & ACPI_EC_FLAG_IBF)) | |
792 | break; | |
02b28a33 LB |
793 | ec->intr.expect_event = 0; |
794 | wake_up(&ec->intr.wait); | |
716e084e LY |
795 | return ACPI_INTERRUPT_HANDLED; |
796 | default: | |
797 | break; | |
451566f4 DT |
798 | } |
799 | ||
50526df6 | 800 | if (value & ACPI_EC_FLAG_SCI) { |
02b28a33 | 801 | atomic_add(1, &ec->intr.pending_gpe); |
451566f4 | 802 | status = acpi_os_queue_for_execution(OSD_PRIORITY_GPE, |
50526df6 | 803 | acpi_ec_gpe_query, ec); |
17e9c78a | 804 | return status == AE_OK ? |
50526df6 LB |
805 | ACPI_INTERRUPT_HANDLED : ACPI_INTERRUPT_NOT_HANDLED; |
806 | } | |
45bea155 | 807 | acpi_enable_gpe(NULL, ec->common.gpe_bit, ACPI_ISR); |
451566f4 | 808 | return status == AE_OK ? |
50526df6 | 809 | ACPI_INTERRUPT_HANDLED : ACPI_INTERRUPT_NOT_HANDLED; |
1da177e4 LT |
810 | } |
811 | ||
812 | /* -------------------------------------------------------------------------- | |
813 | Address Space Management | |
814 | -------------------------------------------------------------------------- */ | |
815 | ||
816 | static acpi_status | |
50526df6 LB |
817 | acpi_ec_space_setup(acpi_handle region_handle, |
818 | u32 function, void *handler_context, void **return_context) | |
1da177e4 LT |
819 | { |
820 | /* | |
821 | * The EC object is in the handler context and is needed | |
822 | * when calling the acpi_ec_space_handler. | |
823 | */ | |
50526df6 LB |
824 | *return_context = (function != ACPI_REGION_DEACTIVATE) ? |
825 | handler_context : NULL; | |
1da177e4 LT |
826 | |
827 | return AE_OK; | |
828 | } | |
829 | ||
1da177e4 | 830 | static acpi_status |
50526df6 LB |
831 | acpi_ec_space_handler(u32 function, |
832 | acpi_physical_address address, | |
833 | u32 bit_width, | |
834 | acpi_integer * value, | |
835 | void *handler_context, void *region_context) | |
1da177e4 | 836 | { |
50526df6 LB |
837 | int result = 0; |
838 | union acpi_ec *ec = NULL; | |
839 | u64 temp = *value; | |
840 | acpi_integer f_v = 0; | |
841 | int i = 0; | |
1da177e4 LT |
842 | |
843 | ACPI_FUNCTION_TRACE("acpi_ec_space_handler"); | |
844 | ||
845 | if ((address > 0xFF) || !value || !handler_context) | |
846 | return_VALUE(AE_BAD_PARAMETER); | |
847 | ||
fa9cd547 | 848 | if (bit_width != 8 && acpi_strict) { |
50526df6 LB |
849 | printk(KERN_WARNING PREFIX |
850 | "acpi_ec_space_handler: bit_width should be 8\n"); | |
fa9cd547 | 851 | return_VALUE(AE_BAD_PARAMETER); |
1da177e4 LT |
852 | } |
853 | ||
50526df6 | 854 | ec = (union acpi_ec *)handler_context; |
1da177e4 | 855 | |
50526df6 | 856 | next_byte: |
1da177e4 LT |
857 | switch (function) { |
858 | case ACPI_READ: | |
fa9cd547 | 859 | temp = 0; |
50526df6 | 860 | result = acpi_ec_read(ec, (u8) address, (u32 *) & temp); |
1da177e4 LT |
861 | break; |
862 | case ACPI_WRITE: | |
fa9cd547 | 863 | result = acpi_ec_write(ec, (u8) address, (u8) temp); |
1da177e4 LT |
864 | break; |
865 | default: | |
866 | result = -EINVAL; | |
867 | goto out; | |
868 | break; | |
869 | } | |
870 | ||
871 | bit_width -= 8; | |
fa9cd547 LY |
872 | if (bit_width) { |
873 | if (function == ACPI_READ) | |
874 | f_v |= temp << 8 * i; | |
875 | if (function == ACPI_WRITE) | |
876 | temp >>= 8; | |
1da177e4 | 877 | i++; |
83ea7445 | 878 | address++; |
1da177e4 LT |
879 | goto next_byte; |
880 | } | |
881 | ||
fa9cd547 LY |
882 | if (function == ACPI_READ) { |
883 | f_v |= temp << 8 * i; | |
1da177e4 LT |
884 | *value = f_v; |
885 | } | |
886 | ||
50526df6 | 887 | out: |
1da177e4 LT |
888 | switch (result) { |
889 | case -EINVAL: | |
890 | return_VALUE(AE_BAD_PARAMETER); | |
891 | break; | |
892 | case -ENODEV: | |
893 | return_VALUE(AE_NOT_FOUND); | |
894 | break; | |
895 | case -ETIME: | |
896 | return_VALUE(AE_TIME); | |
897 | break; | |
898 | default: | |
899 | return_VALUE(AE_OK); | |
900 | } | |
1da177e4 LT |
901 | } |
902 | ||
1da177e4 LT |
903 | /* -------------------------------------------------------------------------- |
904 | FS Interface (/proc) | |
905 | -------------------------------------------------------------------------- */ | |
906 | ||
50526df6 | 907 | static struct proc_dir_entry *acpi_ec_dir; |
1da177e4 | 908 | |
50526df6 | 909 | static int acpi_ec_read_info(struct seq_file *seq, void *offset) |
1da177e4 | 910 | { |
50526df6 | 911 | union acpi_ec *ec = (union acpi_ec *)seq->private; |
1da177e4 LT |
912 | |
913 | ACPI_FUNCTION_TRACE("acpi_ec_read_info"); | |
914 | ||
915 | if (!ec) | |
916 | goto end; | |
917 | ||
918 | seq_printf(seq, "gpe bit: 0x%02x\n", | |
50526df6 | 919 | (u32) ec->common.gpe_bit); |
1da177e4 | 920 | seq_printf(seq, "ports: 0x%02x, 0x%02x\n", |
50526df6 LB |
921 | (u32) ec->common.status_addr.address, |
922 | (u32) ec->common.data_addr.address); | |
1da177e4 | 923 | seq_printf(seq, "use global lock: %s\n", |
50526df6 | 924 | ec->common.global_lock ? "yes" : "no"); |
45bea155 | 925 | acpi_enable_gpe(NULL, ec->common.gpe_bit, ACPI_NOT_ISR); |
1da177e4 | 926 | |
50526df6 | 927 | end: |
1da177e4 LT |
928 | return_VALUE(0); |
929 | } | |
930 | ||
931 | static int acpi_ec_info_open_fs(struct inode *inode, struct file *file) | |
932 | { | |
933 | return single_open(file, acpi_ec_read_info, PDE(inode)->data); | |
934 | } | |
935 | ||
936 | static struct file_operations acpi_ec_info_ops = { | |
50526df6 LB |
937 | .open = acpi_ec_info_open_fs, |
938 | .read = seq_read, | |
939 | .llseek = seq_lseek, | |
940 | .release = single_release, | |
1da177e4 LT |
941 | .owner = THIS_MODULE, |
942 | }; | |
943 | ||
50526df6 | 944 | static int acpi_ec_add_fs(struct acpi_device *device) |
1da177e4 | 945 | { |
50526df6 | 946 | struct proc_dir_entry *entry = NULL; |
1da177e4 LT |
947 | |
948 | ACPI_FUNCTION_TRACE("acpi_ec_add_fs"); | |
949 | ||
950 | if (!acpi_device_dir(device)) { | |
951 | acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device), | |
50526df6 | 952 | acpi_ec_dir); |
1da177e4 LT |
953 | if (!acpi_device_dir(device)) |
954 | return_VALUE(-ENODEV); | |
955 | } | |
956 | ||
957 | entry = create_proc_entry(ACPI_EC_FILE_INFO, S_IRUGO, | |
50526df6 | 958 | acpi_device_dir(device)); |
1da177e4 LT |
959 | if (!entry) |
960 | ACPI_DEBUG_PRINT((ACPI_DB_WARN, | |
50526df6 LB |
961 | "Unable to create '%s' fs entry\n", |
962 | ACPI_EC_FILE_INFO)); | |
1da177e4 LT |
963 | else { |
964 | entry->proc_fops = &acpi_ec_info_ops; | |
965 | entry->data = acpi_driver_data(device); | |
966 | entry->owner = THIS_MODULE; | |
967 | } | |
968 | ||
969 | return_VALUE(0); | |
970 | } | |
971 | ||
50526df6 | 972 | static int acpi_ec_remove_fs(struct acpi_device *device) |
1da177e4 LT |
973 | { |
974 | ACPI_FUNCTION_TRACE("acpi_ec_remove_fs"); | |
975 | ||
976 | if (acpi_device_dir(device)) { | |
977 | remove_proc_entry(ACPI_EC_FILE_INFO, acpi_device_dir(device)); | |
978 | remove_proc_entry(acpi_device_bid(device), acpi_ec_dir); | |
979 | acpi_device_dir(device) = NULL; | |
980 | } | |
981 | ||
982 | return_VALUE(0); | |
983 | } | |
984 | ||
1da177e4 LT |
985 | /* -------------------------------------------------------------------------- |
986 | Driver Interface | |
987 | -------------------------------------------------------------------------- */ | |
988 | ||
02b28a33 | 989 | static int acpi_ec_poll_add(struct acpi_device *device) |
1da177e4 | 990 | { |
50526df6 LB |
991 | int result = 0; |
992 | acpi_status status = AE_OK; | |
993 | union acpi_ec *ec = NULL; | |
994 | unsigned long uid; | |
45bea155 LY |
995 | |
996 | ACPI_FUNCTION_TRACE("acpi_ec_add"); | |
997 | ||
998 | if (!device) | |
999 | return_VALUE(-EINVAL); | |
1000 | ||
1001 | ec = kmalloc(sizeof(union acpi_ec), GFP_KERNEL); | |
1002 | if (!ec) | |
1003 | return_VALUE(-ENOMEM); | |
1004 | memset(ec, 0, sizeof(union acpi_ec)); | |
1005 | ||
1006 | ec->common.handle = device->handle; | |
1007 | ec->common.uid = -1; | |
02b28a33 | 1008 | spin_lock_init(&ec->poll.lock); |
45bea155 LY |
1009 | strcpy(acpi_device_name(device), ACPI_EC_DEVICE_NAME); |
1010 | strcpy(acpi_device_class(device), ACPI_EC_CLASS); | |
1011 | acpi_driver_data(device) = ec; | |
1012 | ||
1013 | /* Use the global lock for all EC transactions? */ | |
50526df6 LB |
1014 | acpi_evaluate_integer(ec->common.handle, "_GLK", NULL, |
1015 | &ec->common.global_lock); | |
45bea155 LY |
1016 | |
1017 | /* If our UID matches the UID for the ECDT-enumerated EC, | |
50526df6 | 1018 | we now have the *real* EC info, so kill the makeshift one. */ |
45bea155 LY |
1019 | acpi_evaluate_integer(ec->common.handle, "_UID", NULL, &uid); |
1020 | if (ec_ecdt && ec_ecdt->common.uid == uid) { | |
1021 | acpi_remove_address_space_handler(ACPI_ROOT_OBJECT, | |
50526df6 LB |
1022 | ACPI_ADR_SPACE_EC, |
1023 | &acpi_ec_space_handler); | |
1024 | ||
1025 | acpi_remove_gpe_handler(NULL, ec_ecdt->common.gpe_bit, | |
1026 | &acpi_ec_gpe_handler); | |
45bea155 LY |
1027 | |
1028 | kfree(ec_ecdt); | |
1029 | } | |
1030 | ||
1031 | /* Get GPE bit assignment (EC events). */ | |
1032 | /* TODO: Add support for _GPE returning a package */ | |
50526df6 LB |
1033 | status = |
1034 | acpi_evaluate_integer(ec->common.handle, "_GPE", NULL, | |
1035 | &ec->common.gpe_bit); | |
45bea155 LY |
1036 | if (ACPI_FAILURE(status)) { |
1037 | ACPI_DEBUG_PRINT((ACPI_DB_ERROR, | |
50526df6 | 1038 | "Error obtaining GPE bit assignment\n")); |
45bea155 LY |
1039 | result = -ENODEV; |
1040 | goto end; | |
1041 | } | |
1042 | ||
1043 | result = acpi_ec_add_fs(device); | |
1044 | if (result) | |
1045 | goto end; | |
1046 | ||
02b28a33 | 1047 | printk(KERN_INFO PREFIX "%s [%s] (gpe %d) polling mode.\n", |
50526df6 LB |
1048 | acpi_device_name(device), acpi_device_bid(device), |
1049 | (u32) ec->common.gpe_bit); | |
45bea155 LY |
1050 | |
1051 | if (!first_ec) | |
1052 | first_ec = device; | |
1053 | ||
50526df6 | 1054 | end: |
45bea155 LY |
1055 | if (result) |
1056 | kfree(ec); | |
1057 | ||
1058 | return_VALUE(result); | |
1059 | } | |
02b28a33 | 1060 | static int acpi_ec_intr_add(struct acpi_device *device) |
45bea155 | 1061 | { |
50526df6 LB |
1062 | int result = 0; |
1063 | acpi_status status = AE_OK; | |
1064 | union acpi_ec *ec = NULL; | |
1065 | unsigned long uid; | |
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 LT |
1090 | |
1091 | /* If our UID matches the UID for the ECDT-enumerated EC, | |
50526df6 | 1092 | we now have the *real* EC info, so kill the makeshift one. */ |
45bea155 LY |
1093 | acpi_evaluate_integer(ec->common.handle, "_UID", NULL, &uid); |
1094 | if (ec_ecdt && ec_ecdt->common.uid == uid) { | |
1da177e4 | 1095 | acpi_remove_address_space_handler(ACPI_ROOT_OBJECT, |
50526df6 LB |
1096 | ACPI_ADR_SPACE_EC, |
1097 | &acpi_ec_space_handler); | |
451566f4 | 1098 | |
50526df6 LB |
1099 | acpi_remove_gpe_handler(NULL, ec_ecdt->common.gpe_bit, |
1100 | &acpi_ec_gpe_handler); | |
1da177e4 LT |
1101 | |
1102 | kfree(ec_ecdt); | |
1103 | } | |
1104 | ||
1105 | /* Get GPE bit assignment (EC events). */ | |
1106 | /* TODO: Add support for _GPE returning a package */ | |
50526df6 LB |
1107 | status = |
1108 | acpi_evaluate_integer(ec->common.handle, "_GPE", NULL, | |
1109 | &ec->common.gpe_bit); | |
1da177e4 LT |
1110 | if (ACPI_FAILURE(status)) { |
1111 | ACPI_DEBUG_PRINT((ACPI_DB_ERROR, | |
50526df6 | 1112 | "Error obtaining GPE bit assignment\n")); |
1da177e4 LT |
1113 | result = -ENODEV; |
1114 | goto end; | |
1115 | } | |
1116 | ||
1117 | result = acpi_ec_add_fs(device); | |
1118 | if (result) | |
1119 | goto end; | |
1120 | ||
02b28a33 | 1121 | printk(KERN_INFO PREFIX "%s [%s] (gpe %d) interrupt mode.\n", |
50526df6 LB |
1122 | acpi_device_name(device), acpi_device_bid(device), |
1123 | (u32) ec->common.gpe_bit); | |
1da177e4 LT |
1124 | |
1125 | if (!first_ec) | |
1126 | first_ec = device; | |
1127 | ||
50526df6 | 1128 | end: |
1da177e4 LT |
1129 | if (result) |
1130 | kfree(ec); | |
1131 | ||
1132 | return_VALUE(result); | |
1133 | } | |
1134 | ||
50526df6 | 1135 | static int acpi_ec_remove(struct acpi_device *device, int type) |
1da177e4 | 1136 | { |
50526df6 | 1137 | union acpi_ec *ec = NULL; |
1da177e4 LT |
1138 | |
1139 | ACPI_FUNCTION_TRACE("acpi_ec_remove"); | |
1140 | ||
1141 | if (!device) | |
1142 | return_VALUE(-EINVAL); | |
1143 | ||
1144 | ec = acpi_driver_data(device); | |
1145 | ||
1146 | acpi_ec_remove_fs(device); | |
1147 | ||
1148 | kfree(ec); | |
1149 | ||
1150 | return_VALUE(0); | |
1151 | } | |
1152 | ||
1da177e4 | 1153 | static acpi_status |
50526df6 | 1154 | acpi_ec_io_ports(struct acpi_resource *resource, void *context) |
1da177e4 | 1155 | { |
50526df6 | 1156 | union acpi_ec *ec = (union acpi_ec *)context; |
1da177e4 LT |
1157 | struct acpi_generic_address *addr; |
1158 | ||
50eca3eb | 1159 | if (resource->type != ACPI_RESOURCE_TYPE_IO) { |
1da177e4 LT |
1160 | return AE_OK; |
1161 | } | |
1162 | ||
1163 | /* | |
1164 | * The first address region returned is the data port, and | |
1165 | * the second address region returned is the status/command | |
1166 | * port. | |
1167 | */ | |
45bea155 LY |
1168 | if (ec->common.data_addr.register_bit_width == 0) { |
1169 | addr = &ec->common.data_addr; | |
1170 | } else if (ec->common.command_addr.register_bit_width == 0) { | |
1171 | addr = &ec->common.command_addr; | |
1da177e4 LT |
1172 | } else { |
1173 | return AE_CTRL_TERMINATE; | |
1174 | } | |
1175 | ||
1176 | addr->address_space_id = ACPI_ADR_SPACE_SYSTEM_IO; | |
1177 | addr->register_bit_width = 8; | |
1178 | addr->register_bit_offset = 0; | |
50eca3eb | 1179 | addr->address = resource->data.io.minimum; |
1da177e4 LT |
1180 | |
1181 | return AE_OK; | |
1182 | } | |
1183 | ||
50526df6 | 1184 | static int acpi_ec_start(struct acpi_device *device) |
1da177e4 | 1185 | { |
50526df6 LB |
1186 | acpi_status status = AE_OK; |
1187 | union acpi_ec *ec = NULL; | |
1da177e4 LT |
1188 | |
1189 | ACPI_FUNCTION_TRACE("acpi_ec_start"); | |
1190 | ||
1191 | if (!device) | |
1192 | return_VALUE(-EINVAL); | |
1193 | ||
1194 | ec = acpi_driver_data(device); | |
1195 | ||
1196 | if (!ec) | |
1197 | return_VALUE(-EINVAL); | |
1198 | ||
1199 | /* | |
1200 | * Get I/O port addresses. Convert to GAS format. | |
1201 | */ | |
45bea155 | 1202 | status = acpi_walk_resources(ec->common.handle, METHOD_NAME__CRS, |
50526df6 LB |
1203 | acpi_ec_io_ports, ec); |
1204 | if (ACPI_FAILURE(status) | |
1205 | || ec->common.command_addr.register_bit_width == 0) { | |
1206 | ACPI_DEBUG_PRINT((ACPI_DB_ERROR, | |
1207 | "Error getting I/O port addresses")); | |
1da177e4 LT |
1208 | return_VALUE(-ENODEV); |
1209 | } | |
1210 | ||
45bea155 | 1211 | ec->common.status_addr = ec->common.command_addr; |
1da177e4 LT |
1212 | |
1213 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "gpe=0x%02x, ports=0x%2x,0x%2x\n", | |
50526df6 LB |
1214 | (u32) ec->common.gpe_bit, |
1215 | (u32) ec->common.command_addr.address, | |
1216 | (u32) ec->common.data_addr.address)); | |
1da177e4 LT |
1217 | |
1218 | /* | |
1219 | * Install GPE handler | |
1220 | */ | |
45bea155 | 1221 | status = acpi_install_gpe_handler(NULL, ec->common.gpe_bit, |
50526df6 LB |
1222 | ACPI_GPE_EDGE_TRIGGERED, |
1223 | &acpi_ec_gpe_handler, ec); | |
1da177e4 LT |
1224 | if (ACPI_FAILURE(status)) { |
1225 | return_VALUE(-ENODEV); | |
1226 | } | |
50526df6 LB |
1227 | acpi_set_gpe_type(NULL, ec->common.gpe_bit, ACPI_GPE_TYPE_RUNTIME); |
1228 | acpi_enable_gpe(NULL, ec->common.gpe_bit, ACPI_NOT_ISR); | |
1da177e4 | 1229 | |
50526df6 LB |
1230 | status = acpi_install_address_space_handler(ec->common.handle, |
1231 | ACPI_ADR_SPACE_EC, | |
1232 | &acpi_ec_space_handler, | |
1233 | &acpi_ec_space_setup, ec); | |
1da177e4 | 1234 | if (ACPI_FAILURE(status)) { |
50526df6 LB |
1235 | acpi_remove_gpe_handler(NULL, ec->common.gpe_bit, |
1236 | &acpi_ec_gpe_handler); | |
1da177e4 LT |
1237 | return_VALUE(-ENODEV); |
1238 | } | |
1239 | ||
1240 | return_VALUE(AE_OK); | |
1241 | } | |
1242 | ||
50526df6 | 1243 | static int acpi_ec_stop(struct acpi_device *device, int type) |
1da177e4 | 1244 | { |
50526df6 LB |
1245 | acpi_status status = AE_OK; |
1246 | union acpi_ec *ec = NULL; | |
1da177e4 LT |
1247 | |
1248 | ACPI_FUNCTION_TRACE("acpi_ec_stop"); | |
1249 | ||
1250 | if (!device) | |
1251 | return_VALUE(-EINVAL); | |
1252 | ||
1253 | ec = acpi_driver_data(device); | |
1254 | ||
45bea155 | 1255 | status = acpi_remove_address_space_handler(ec->common.handle, |
50526df6 LB |
1256 | ACPI_ADR_SPACE_EC, |
1257 | &acpi_ec_space_handler); | |
1da177e4 LT |
1258 | if (ACPI_FAILURE(status)) |
1259 | return_VALUE(-ENODEV); | |
1260 | ||
50526df6 LB |
1261 | status = |
1262 | acpi_remove_gpe_handler(NULL, ec->common.gpe_bit, | |
1263 | &acpi_ec_gpe_handler); | |
1da177e4 LT |
1264 | if (ACPI_FAILURE(status)) |
1265 | return_VALUE(-ENODEV); | |
1266 | ||
1267 | return_VALUE(0); | |
1268 | } | |
1269 | ||
1270 | static acpi_status __init | |
50526df6 LB |
1271 | acpi_fake_ecdt_callback(acpi_handle handle, |
1272 | u32 Level, void *context, void **retval) | |
1da177e4 | 1273 | { |
45bea155 | 1274 | |
02b28a33 LB |
1275 | if (acpi_ec_poll_mode) |
1276 | return acpi_fake_ecdt_poll_callback(handle, | |
50526df6 | 1277 | Level, context, retval); |
45bea155 | 1278 | else |
02b28a33 | 1279 | return acpi_fake_ecdt_intr_callback(handle, |
50526df6 | 1280 | Level, context, retval); |
45bea155 LY |
1281 | } |
1282 | ||
1283 | static acpi_status __init | |
02b28a33 | 1284 | acpi_fake_ecdt_poll_callback(acpi_handle handle, |
50526df6 | 1285 | u32 Level, void *context, void **retval) |
45bea155 | 1286 | { |
50526df6 | 1287 | acpi_status status; |
45bea155 LY |
1288 | |
1289 | status = acpi_walk_resources(handle, METHOD_NAME__CRS, | |
50526df6 | 1290 | acpi_ec_io_ports, ec_ecdt); |
45bea155 LY |
1291 | if (ACPI_FAILURE(status)) |
1292 | return status; | |
1293 | ec_ecdt->common.status_addr = ec_ecdt->common.command_addr; | |
1294 | ||
1295 | ec_ecdt->common.uid = -1; | |
1296 | acpi_evaluate_integer(handle, "_UID", NULL, &ec_ecdt->common.uid); | |
1297 | ||
50526df6 LB |
1298 | status = |
1299 | acpi_evaluate_integer(handle, "_GPE", NULL, | |
1300 | &ec_ecdt->common.gpe_bit); | |
45bea155 LY |
1301 | if (ACPI_FAILURE(status)) |
1302 | return status; | |
02b28a33 | 1303 | spin_lock_init(&ec_ecdt->poll.lock); |
45bea155 LY |
1304 | ec_ecdt->common.global_lock = TRUE; |
1305 | ec_ecdt->common.handle = handle; | |
1306 | ||
50526df6 LB |
1307 | printk(KERN_INFO PREFIX "GPE=0x%02x, ports=0x%2x, 0x%2x\n", |
1308 | (u32) ec_ecdt->common.gpe_bit, | |
1309 | (u32) ec_ecdt->common.command_addr.address, | |
1310 | (u32) ec_ecdt->common.data_addr.address); | |
45bea155 LY |
1311 | |
1312 | return AE_CTRL_TERMINATE; | |
1313 | } | |
1314 | ||
1315 | static acpi_status __init | |
02b28a33 | 1316 | acpi_fake_ecdt_intr_callback(acpi_handle handle, |
50526df6 | 1317 | u32 Level, void *context, void **retval) |
45bea155 | 1318 | { |
50526df6 | 1319 | acpi_status status; |
1da177e4 | 1320 | |
02b28a33 LB |
1321 | init_MUTEX(&ec_ecdt->intr.sem); |
1322 | init_waitqueue_head(&ec_ecdt->intr.wait); | |
1da177e4 | 1323 | status = acpi_walk_resources(handle, METHOD_NAME__CRS, |
50526df6 | 1324 | acpi_ec_io_ports, ec_ecdt); |
1da177e4 LT |
1325 | if (ACPI_FAILURE(status)) |
1326 | return status; | |
45bea155 | 1327 | ec_ecdt->common.status_addr = ec_ecdt->common.command_addr; |
1da177e4 | 1328 | |
45bea155 LY |
1329 | ec_ecdt->common.uid = -1; |
1330 | acpi_evaluate_integer(handle, "_UID", NULL, &ec_ecdt->common.uid); | |
1da177e4 | 1331 | |
50526df6 LB |
1332 | status = |
1333 | acpi_evaluate_integer(handle, "_GPE", NULL, | |
1334 | &ec_ecdt->common.gpe_bit); | |
1da177e4 LT |
1335 | if (ACPI_FAILURE(status)) |
1336 | return status; | |
45bea155 LY |
1337 | ec_ecdt->common.global_lock = TRUE; |
1338 | ec_ecdt->common.handle = handle; | |
1da177e4 | 1339 | |
50526df6 LB |
1340 | printk(KERN_INFO PREFIX "GPE=0x%02x, ports=0x%2x, 0x%2x\n", |
1341 | (u32) ec_ecdt->common.gpe_bit, | |
1342 | (u32) ec_ecdt->common.command_addr.address, | |
1343 | (u32) ec_ecdt->common.data_addr.address); | |
1da177e4 LT |
1344 | |
1345 | return AE_CTRL_TERMINATE; | |
1346 | } | |
1347 | ||
1348 | /* | |
1349 | * Some BIOS (such as some from Gateway laptops) access EC region very early | |
1350 | * such as in BAT0._INI or EC._INI before an EC device is found and | |
1351 | * do not provide an ECDT. According to ACPI spec, ECDT isn't mandatorily | |
1352 | * required, but if EC regison is accessed early, it is required. | |
1353 | * The routine tries to workaround the BIOS bug by pre-scan EC device | |
1354 | * It assumes that _CRS, _HID, _GPE, _UID methods of EC don't touch any | |
1355 | * op region (since _REG isn't invoked yet). The assumption is true for | |
1356 | * all systems found. | |
1357 | */ | |
50526df6 | 1358 | static int __init acpi_ec_fake_ecdt(void) |
1da177e4 | 1359 | { |
50526df6 LB |
1360 | acpi_status status; |
1361 | int ret = 0; | |
1da177e4 LT |
1362 | |
1363 | printk(KERN_INFO PREFIX "Try to make an fake ECDT\n"); | |
1364 | ||
45bea155 | 1365 | ec_ecdt = kmalloc(sizeof(union acpi_ec), GFP_KERNEL); |
1da177e4 LT |
1366 | if (!ec_ecdt) { |
1367 | ret = -ENOMEM; | |
1368 | goto error; | |
1369 | } | |
45bea155 | 1370 | memset(ec_ecdt, 0, sizeof(union acpi_ec)); |
1da177e4 | 1371 | |
50526df6 LB |
1372 | status = acpi_get_devices(ACPI_EC_HID, |
1373 | acpi_fake_ecdt_callback, NULL, NULL); | |
1da177e4 LT |
1374 | if (ACPI_FAILURE(status)) { |
1375 | kfree(ec_ecdt); | |
1376 | ec_ecdt = NULL; | |
1377 | ret = -ENODEV; | |
1378 | goto error; | |
1379 | } | |
1380 | return 0; | |
50526df6 | 1381 | error: |
1da177e4 LT |
1382 | printk(KERN_ERR PREFIX "Can't make an fake ECDT\n"); |
1383 | return ret; | |
1384 | } | |
1385 | ||
50526df6 | 1386 | static int __init acpi_ec_get_real_ecdt(void) |
45bea155 | 1387 | { |
02b28a33 LB |
1388 | if (acpi_ec_poll_mode) |
1389 | return acpi_ec_poll_get_real_ecdt(); | |
45bea155 | 1390 | else |
02b28a33 | 1391 | return acpi_ec_intr_get_real_ecdt(); |
45bea155 LY |
1392 | } |
1393 | ||
02b28a33 | 1394 | static int __init acpi_ec_poll_get_real_ecdt(void) |
45bea155 | 1395 | { |
50526df6 LB |
1396 | acpi_status status; |
1397 | struct acpi_table_ecdt *ecdt_ptr; | |
45bea155 | 1398 | |
50526df6 LB |
1399 | status = acpi_get_firmware_table("ECDT", 1, ACPI_LOGICAL_ADDRESSING, |
1400 | (struct acpi_table_header **) | |
1401 | &ecdt_ptr); | |
45bea155 LY |
1402 | if (ACPI_FAILURE(status)) |
1403 | return -ENODEV; | |
1404 | ||
1405 | printk(KERN_INFO PREFIX "Found ECDT\n"); | |
1406 | ||
1407 | /* | |
1408 | * Generate a temporary ec context to use until the namespace is scanned | |
1409 | */ | |
1410 | ec_ecdt = kmalloc(sizeof(union acpi_ec), GFP_KERNEL); | |
1411 | if (!ec_ecdt) | |
1412 | return -ENOMEM; | |
1413 | memset(ec_ecdt, 0, sizeof(union acpi_ec)); | |
1414 | ||
1415 | ec_ecdt->common.command_addr = ecdt_ptr->ec_control; | |
1416 | ec_ecdt->common.status_addr = ecdt_ptr->ec_control; | |
1417 | ec_ecdt->common.data_addr = ecdt_ptr->ec_data; | |
1418 | ec_ecdt->common.gpe_bit = ecdt_ptr->gpe_bit; | |
02b28a33 | 1419 | spin_lock_init(&ec_ecdt->poll.lock); |
45bea155 LY |
1420 | /* use the GL just to be safe */ |
1421 | ec_ecdt->common.global_lock = TRUE; | |
1422 | ec_ecdt->common.uid = ecdt_ptr->uid; | |
1423 | ||
50526df6 LB |
1424 | status = |
1425 | acpi_get_handle(NULL, ecdt_ptr->ec_id, &ec_ecdt->common.handle); | |
45bea155 LY |
1426 | if (ACPI_FAILURE(status)) { |
1427 | goto error; | |
1428 | } | |
1429 | ||
1430 | return 0; | |
50526df6 | 1431 | error: |
45bea155 LY |
1432 | printk(KERN_ERR PREFIX "Could not use ECDT\n"); |
1433 | kfree(ec_ecdt); | |
1434 | ec_ecdt = NULL; | |
1435 | ||
1436 | return -ENODEV; | |
1437 | } | |
1438 | ||
02b28a33 | 1439 | static int __init acpi_ec_intr_get_real_ecdt(void) |
1da177e4 | 1440 | { |
50526df6 LB |
1441 | acpi_status status; |
1442 | struct acpi_table_ecdt *ecdt_ptr; | |
1da177e4 | 1443 | |
451566f4 | 1444 | status = acpi_get_firmware_table("ECDT", 1, ACPI_LOGICAL_ADDRESSING, |
50526df6 LB |
1445 | (struct acpi_table_header **) |
1446 | &ecdt_ptr); | |
1da177e4 LT |
1447 | if (ACPI_FAILURE(status)) |
1448 | return -ENODEV; | |
1449 | ||
1450 | printk(KERN_INFO PREFIX "Found ECDT\n"); | |
1451 | ||
1452 | /* | |
1453 | * Generate a temporary ec context to use until the namespace is scanned | |
1454 | */ | |
45bea155 | 1455 | ec_ecdt = kmalloc(sizeof(union acpi_ec), GFP_KERNEL); |
1da177e4 LT |
1456 | if (!ec_ecdt) |
1457 | return -ENOMEM; | |
45bea155 LY |
1458 | memset(ec_ecdt, 0, sizeof(union acpi_ec)); |
1459 | ||
02b28a33 LB |
1460 | init_MUTEX(&ec_ecdt->intr.sem); |
1461 | init_waitqueue_head(&ec_ecdt->intr.wait); | |
45bea155 LY |
1462 | ec_ecdt->common.command_addr = ecdt_ptr->ec_control; |
1463 | ec_ecdt->common.status_addr = ecdt_ptr->ec_control; | |
1464 | ec_ecdt->common.data_addr = ecdt_ptr->ec_data; | |
1465 | ec_ecdt->common.gpe_bit = ecdt_ptr->gpe_bit; | |
1da177e4 | 1466 | /* use the GL just to be safe */ |
45bea155 LY |
1467 | ec_ecdt->common.global_lock = TRUE; |
1468 | ec_ecdt->common.uid = ecdt_ptr->uid; | |
1da177e4 | 1469 | |
50526df6 LB |
1470 | status = |
1471 | acpi_get_handle(NULL, ecdt_ptr->ec_id, &ec_ecdt->common.handle); | |
1da177e4 LT |
1472 | if (ACPI_FAILURE(status)) { |
1473 | goto error; | |
1474 | } | |
1475 | ||
1476 | return 0; | |
50526df6 | 1477 | error: |
1da177e4 LT |
1478 | printk(KERN_ERR PREFIX "Could not use ECDT\n"); |
1479 | kfree(ec_ecdt); | |
1480 | ec_ecdt = NULL; | |
1481 | ||
1482 | return -ENODEV; | |
1483 | } | |
1484 | ||
1485 | static int __initdata acpi_fake_ecdt_enabled; | |
50526df6 | 1486 | int __init acpi_ec_ecdt_probe(void) |
1da177e4 | 1487 | { |
50526df6 LB |
1488 | acpi_status status; |
1489 | int ret; | |
1da177e4 LT |
1490 | |
1491 | ret = acpi_ec_get_real_ecdt(); | |
1492 | /* Try to make a fake ECDT */ | |
1493 | if (ret && acpi_fake_ecdt_enabled) { | |
1494 | ret = acpi_ec_fake_ecdt(); | |
1495 | } | |
1496 | ||
1497 | if (ret) | |
1498 | return 0; | |
1499 | ||
1500 | /* | |
1501 | * Install GPE handler | |
1502 | */ | |
45bea155 | 1503 | status = acpi_install_gpe_handler(NULL, ec_ecdt->common.gpe_bit, |
50526df6 LB |
1504 | ACPI_GPE_EDGE_TRIGGERED, |
1505 | &acpi_ec_gpe_handler, ec_ecdt); | |
1da177e4 LT |
1506 | if (ACPI_FAILURE(status)) { |
1507 | goto error; | |
1508 | } | |
50526df6 LB |
1509 | acpi_set_gpe_type(NULL, ec_ecdt->common.gpe_bit, ACPI_GPE_TYPE_RUNTIME); |
1510 | acpi_enable_gpe(NULL, ec_ecdt->common.gpe_bit, ACPI_NOT_ISR); | |
1511 | ||
1512 | status = acpi_install_address_space_handler(ACPI_ROOT_OBJECT, | |
1513 | ACPI_ADR_SPACE_EC, | |
1514 | &acpi_ec_space_handler, | |
1515 | &acpi_ec_space_setup, | |
1516 | ec_ecdt); | |
1da177e4 | 1517 | if (ACPI_FAILURE(status)) { |
45bea155 | 1518 | acpi_remove_gpe_handler(NULL, ec_ecdt->common.gpe_bit, |
50526df6 | 1519 | &acpi_ec_gpe_handler); |
1da177e4 LT |
1520 | goto error; |
1521 | } | |
1522 | ||
1523 | return 0; | |
1524 | ||
50526df6 | 1525 | error: |
1da177e4 LT |
1526 | printk(KERN_ERR PREFIX "Could not use ECDT\n"); |
1527 | kfree(ec_ecdt); | |
1528 | ec_ecdt = NULL; | |
1529 | ||
1530 | return -ENODEV; | |
1531 | } | |
1532 | ||
50526df6 | 1533 | static int __init acpi_ec_init(void) |
1da177e4 | 1534 | { |
50526df6 | 1535 | int result = 0; |
1da177e4 LT |
1536 | |
1537 | ACPI_FUNCTION_TRACE("acpi_ec_init"); | |
1538 | ||
1539 | if (acpi_disabled) | |
1540 | return_VALUE(0); | |
1541 | ||
1542 | acpi_ec_dir = proc_mkdir(ACPI_EC_CLASS, acpi_root_dir); | |
1543 | if (!acpi_ec_dir) | |
1544 | return_VALUE(-ENODEV); | |
1545 | ||
1546 | /* Now register the driver for the EC */ | |
1547 | result = acpi_bus_register_driver(&acpi_ec_driver); | |
1548 | if (result < 0) { | |
1549 | remove_proc_entry(ACPI_EC_CLASS, acpi_root_dir); | |
1550 | return_VALUE(-ENODEV); | |
1551 | } | |
1552 | ||
1553 | return_VALUE(result); | |
1554 | } | |
1555 | ||
1556 | subsys_initcall(acpi_ec_init); | |
1557 | ||
1558 | /* EC driver currently not unloadable */ | |
1559 | #if 0 | |
50526df6 | 1560 | static void __exit acpi_ec_exit(void) |
1da177e4 LT |
1561 | { |
1562 | ACPI_FUNCTION_TRACE("acpi_ec_exit"); | |
1563 | ||
1564 | acpi_bus_unregister_driver(&acpi_ec_driver); | |
1565 | ||
1566 | remove_proc_entry(ACPI_EC_CLASS, acpi_root_dir); | |
1567 | ||
1568 | return_VOID; | |
1569 | } | |
50526df6 | 1570 | #endif /* 0 */ |
1da177e4 LT |
1571 | |
1572 | static int __init acpi_fake_ecdt_setup(char *str) | |
1573 | { | |
1574 | acpi_fake_ecdt_enabled = 1; | |
1575 | return 0; | |
1576 | } | |
7b15f5e7 | 1577 | |
1da177e4 | 1578 | __setup("acpi_fake_ecdt", acpi_fake_ecdt_setup); |
02b28a33 | 1579 | static int __init acpi_ec_set_intr_mode(char *str) |
45bea155 | 1580 | { |
02b28a33 | 1581 | int intr; |
7b15f5e7 | 1582 | |
02b28a33 | 1583 | if (!get_option(&str, &intr)) |
7b15f5e7 LY |
1584 | return 0; |
1585 | ||
02b28a33 LB |
1586 | if (intr) { |
1587 | acpi_ec_poll_mode = EC_INTR; | |
1588 | acpi_ec_driver.ops.add = acpi_ec_intr_add; | |
7b15f5e7 | 1589 | } else { |
02b28a33 LB |
1590 | acpi_ec_poll_mode = EC_POLL; |
1591 | acpi_ec_driver.ops.add = acpi_ec_poll_add; | |
7b15f5e7 | 1592 | } |
02b28a33 | 1593 | printk(KERN_INFO PREFIX "EC %s mode.\n", intr ? "interrupt" : "polling"); |
45bea155 LY |
1594 | return 0; |
1595 | } | |
50526df6 | 1596 | |
53f11d4f | 1597 | __setup("ec_intr=", acpi_ec_set_intr_mode); |