]>
Commit | Line | Data |
---|---|---|
1da177e4 | 1 | /* |
7c6db4e0 | 2 | * ec.c - ACPI Embedded Controller Driver (v2.1) |
1da177e4 | 3 | * |
7c6db4e0 | 4 | * Copyright (C) 2006-2008 Alexey Starikovskiy <astarikovskiy@suse.de> |
01f22462 | 5 | * Copyright (C) 2006 Denis Sadykov <denis.m.sadykov@intel.com> |
1da177e4 LT |
6 | * Copyright (C) 2004 Luming Yu <luming.yu@intel.com> |
7 | * Copyright (C) 2001, 2002 Andy Grover <andrew.grover@intel.com> | |
8 | * Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com> | |
9 | * | |
10 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | |
11 | * | |
12 | * This program is free software; you can redistribute it and/or modify | |
13 | * it under the terms of the GNU General Public License as published by | |
14 | * the Free Software Foundation; either version 2 of the License, or (at | |
15 | * your option) any later version. | |
16 | * | |
17 | * This program is distributed in the hope that it will be useful, but | |
18 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
19 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
20 | * General Public License for more details. | |
21 | * | |
22 | * You should have received a copy of the GNU General Public License along | |
23 | * with this program; if not, write to the Free Software Foundation, Inc., | |
24 | * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. | |
25 | * | |
26 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | |
27 | */ | |
28 | ||
7c6db4e0 | 29 | /* Uncomment next line to get verbose printout */ |
d772b3b3 | 30 | /* #define DEBUG */ |
16a26e85 | 31 | #define pr_fmt(fmt) "ACPI : EC: " fmt |
d772b3b3 | 32 | |
1da177e4 LT |
33 | #include <linux/kernel.h> |
34 | #include <linux/module.h> | |
35 | #include <linux/init.h> | |
36 | #include <linux/types.h> | |
37 | #include <linux/delay.h> | |
451566f4 | 38 | #include <linux/interrupt.h> |
837012ed | 39 | #include <linux/list.h> |
7c6db4e0 | 40 | #include <linux/spinlock.h> |
5a0e3ad6 | 41 | #include <linux/slab.h> |
8b48463f | 42 | #include <linux/acpi.h> |
eb27cae8 | 43 | #include <linux/dmi.h> |
8b48463f | 44 | #include <asm/io.h> |
1da177e4 | 45 | |
1195a098 TR |
46 | #include "internal.h" |
47 | ||
1da177e4 | 48 | #define ACPI_EC_CLASS "embedded_controller" |
1da177e4 LT |
49 | #define ACPI_EC_DEVICE_NAME "Embedded Controller" |
50 | #define ACPI_EC_FILE_INFO "info" | |
837012ed | 51 | |
703959d4 | 52 | /* EC status register */ |
1da177e4 LT |
53 | #define ACPI_EC_FLAG_OBF 0x01 /* Output buffer full */ |
54 | #define ACPI_EC_FLAG_IBF 0x02 /* Input buffer full */ | |
451566f4 | 55 | #define ACPI_EC_FLAG_BURST 0x10 /* burst mode */ |
1da177e4 | 56 | #define ACPI_EC_FLAG_SCI 0x20 /* EC-SCI occurred */ |
4350933a | 57 | |
703959d4 | 58 | /* EC commands */ |
3261ff4d | 59 | enum ec_command { |
6ccedb10 AS |
60 | ACPI_EC_COMMAND_READ = 0x80, |
61 | ACPI_EC_COMMAND_WRITE = 0x81, | |
62 | ACPI_EC_BURST_ENABLE = 0x82, | |
63 | ACPI_EC_BURST_DISABLE = 0x83, | |
64 | ACPI_EC_COMMAND_QUERY = 0x84, | |
3261ff4d | 65 | }; |
837012ed | 66 | |
5c406412 | 67 | #define ACPI_EC_DELAY 500 /* Wait 500ms max. during EC ops */ |
703959d4 | 68 | #define ACPI_EC_UDELAY_GLK 1000 /* Wait 1ms max. to get global lock */ |
2a84cb98 | 69 | #define ACPI_EC_MSI_UDELAY 550 /* Wait 550us for MSI EC */ |
703959d4 | 70 | |
080e412c | 71 | enum { |
080e412c | 72 | EC_FLAGS_QUERY_PENDING, /* Query is pending */ |
7c6db4e0 | 73 | EC_FLAGS_GPE_STORM, /* GPE storm detected */ |
f6bb13aa | 74 | EC_FLAGS_HANDLERS_INSTALLED, /* Handlers for GPE and |
7c6db4e0 | 75 | * OpReg are installed */ |
fe955682 | 76 | EC_FLAGS_BLOCKED, /* Transactions are blocked */ |
1da177e4 | 77 | }; |
6ffb221a | 78 | |
7a18e96d TR |
79 | /* ec.c is compiled in acpi namespace so this shows up as acpi.ec_delay param */ |
80 | static unsigned int ec_delay __read_mostly = ACPI_EC_DELAY; | |
81 | module_param(ec_delay, uint, 0644); | |
82 | MODULE_PARM_DESC(ec_delay, "Timeout(ms) waited until an EC command completes"); | |
83 | ||
a520d52e FT |
84 | /* |
85 | * If the number of false interrupts per one transaction exceeds | |
86 | * this threshold, will think there is a GPE storm happened and | |
87 | * will disable the GPE for normal transaction. | |
88 | */ | |
89 | static unsigned int ec_storm_threshold __read_mostly = 8; | |
90 | module_param(ec_storm_threshold, uint, 0644); | |
91 | MODULE_PARM_DESC(ec_storm_threshold, "Maxim false GPE numbers not considered as GPE storm"); | |
92 | ||
837012ed AS |
93 | struct acpi_ec_query_handler { |
94 | struct list_head node; | |
95 | acpi_ec_query_func func; | |
96 | acpi_handle handle; | |
97 | void *data; | |
98 | u8 query_bit; | |
99 | }; | |
100 | ||
8463200a | 101 | struct transaction { |
7c6db4e0 AS |
102 | const u8 *wdata; |
103 | u8 *rdata; | |
104 | unsigned short irq_count; | |
8463200a | 105 | u8 command; |
a2f93aea AS |
106 | u8 wi; |
107 | u8 ri; | |
7c6db4e0 AS |
108 | u8 wlen; |
109 | u8 rlen; | |
dd15f8c4 | 110 | bool done; |
7c6db4e0 AS |
111 | }; |
112 | ||
1195a098 TR |
113 | struct acpi_ec *boot_ec, *first_ec; |
114 | EXPORT_SYMBOL(first_ec); | |
703959d4 | 115 | |
5423a0cb | 116 | static int EC_FLAGS_MSI; /* Out-of-spec MSI controller */ |
0adf3c74 | 117 | static int EC_FLAGS_VALIDATE_ECDT; /* ASUStec ECDTs need to be validated */ |
478fa03b | 118 | static int EC_FLAGS_SKIP_DSDT_SCAN; /* Not all BIOS survive early DSDT scan */ |
5423a0cb | 119 | |
1da177e4 LT |
120 | /* -------------------------------------------------------------------------- |
121 | Transaction Management | |
122 | -------------------------------------------------------------------------- */ | |
123 | ||
6ffb221a | 124 | static inline u8 acpi_ec_read_status(struct acpi_ec *ec) |
1da177e4 | 125 | { |
3ebe08a7 | 126 | u8 x = inb(ec->command_addr); |
16a26e85 | 127 | pr_debug("---> status = 0x%2.2x\n", x); |
3ebe08a7 | 128 | return x; |
451566f4 DT |
129 | } |
130 | ||
6ffb221a | 131 | static inline u8 acpi_ec_read_data(struct acpi_ec *ec) |
703959d4 | 132 | { |
3ebe08a7 | 133 | u8 x = inb(ec->data_addr); |
16a26e85 | 134 | pr_debug("---> data = 0x%2.2x\n", x); |
7c6db4e0 | 135 | return x; |
7c6db5e5 DS |
136 | } |
137 | ||
6ffb221a | 138 | static inline void acpi_ec_write_cmd(struct acpi_ec *ec, u8 command) |
45bea155 | 139 | { |
16a26e85 | 140 | pr_debug("<--- command = 0x%2.2x\n", command); |
6ffb221a | 141 | outb(command, ec->command_addr); |
45bea155 LY |
142 | } |
143 | ||
6ffb221a | 144 | static inline void acpi_ec_write_data(struct acpi_ec *ec, u8 data) |
45bea155 | 145 | { |
16a26e85 | 146 | pr_debug("<--- data = 0x%2.2x\n", data); |
6ffb221a | 147 | outb(data, ec->data_addr); |
703959d4 | 148 | } |
45bea155 | 149 | |
7c6db4e0 | 150 | static int ec_transaction_done(struct acpi_ec *ec) |
6ffb221a | 151 | { |
7c6db4e0 AS |
152 | unsigned long flags; |
153 | int ret = 0; | |
f351d027 | 154 | spin_lock_irqsave(&ec->lock, flags); |
dd15f8c4 | 155 | if (!ec->curr || ec->curr->done) |
7c6db4e0 | 156 | ret = 1; |
f351d027 | 157 | spin_unlock_irqrestore(&ec->lock, flags); |
7c6db4e0 | 158 | return ret; |
45bea155 | 159 | } |
451566f4 | 160 | |
a2f93aea AS |
161 | static void start_transaction(struct acpi_ec *ec) |
162 | { | |
163 | ec->curr->irq_count = ec->curr->wi = ec->curr->ri = 0; | |
164 | ec->curr->done = false; | |
165 | acpi_ec_write_cmd(ec, ec->curr->command); | |
166 | } | |
167 | ||
2a84cb98 | 168 | static void advance_transaction(struct acpi_ec *ec, u8 status) |
7c6db5e5 | 169 | { |
7c6db4e0 | 170 | unsigned long flags; |
36b15875 | 171 | struct transaction *t; |
b76b51ba | 172 | |
f351d027 | 173 | spin_lock_irqsave(&ec->lock, flags); |
36b15875 | 174 | t = ec->curr; |
b76b51ba | 175 | if (!t) |
7c6db4e0 | 176 | goto unlock; |
b76b51ba | 177 | if (t->wlen > t->wi) { |
a2f93aea AS |
178 | if ((status & ACPI_EC_FLAG_IBF) == 0) |
179 | acpi_ec_write_data(ec, | |
b76b51ba | 180 | t->wdata[t->wi++]); |
a2f93aea | 181 | else |
dd15f8c4 | 182 | goto err; |
b76b51ba | 183 | } else if (t->rlen > t->ri) { |
7c6db4e0 | 184 | if ((status & ACPI_EC_FLAG_OBF) == 1) { |
b76b51ba FT |
185 | t->rdata[t->ri++] = acpi_ec_read_data(ec); |
186 | if (t->rlen == t->ri) | |
187 | t->done = true; | |
7c6db4e0 | 188 | } else |
dd15f8c4 | 189 | goto err; |
b76b51ba | 190 | } else if (t->wlen == t->wi && |
a2f93aea | 191 | (status & ACPI_EC_FLAG_IBF) == 0) |
b76b51ba | 192 | t->done = true; |
dd15f8c4 AS |
193 | goto unlock; |
194 | err: | |
a3cd8d27 FT |
195 | /* |
196 | * If SCI bit is set, then don't think it's a false IRQ | |
197 | * otherwise will take a not handled IRQ as a false one. | |
198 | */ | |
199 | if (in_interrupt() && !(status & ACPI_EC_FLAG_SCI)) | |
b76b51ba | 200 | ++t->irq_count; |
a3cd8d27 | 201 | |
7c6db4e0 | 202 | unlock: |
f351d027 | 203 | spin_unlock_irqrestore(&ec->lock, flags); |
845625cd | 204 | } |
03d1d99c | 205 | |
a62e8f19 | 206 | static int acpi_ec_sync_query(struct acpi_ec *ec); |
7c6db4e0 | 207 | |
a62e8f19 | 208 | static int ec_check_sci_sync(struct acpi_ec *ec, u8 state) |
7c6db5e5 | 209 | { |
7c6db4e0 AS |
210 | if (state & ACPI_EC_FLAG_SCI) { |
211 | if (!test_and_set_bit(EC_FLAGS_QUERY_PENDING, &ec->flags)) | |
a62e8f19 | 212 | return acpi_ec_sync_query(ec); |
7c6db4e0 AS |
213 | } |
214 | return 0; | |
215 | } | |
216 | ||
217 | static int ec_poll(struct acpi_ec *ec) | |
218 | { | |
2a84cb98 | 219 | unsigned long flags; |
28fe5c82 | 220 | int repeat = 5; /* number of command restarts */ |
2a84cb98 AS |
221 | while (repeat--) { |
222 | unsigned long delay = jiffies + | |
7a18e96d | 223 | msecs_to_jiffies(ec_delay); |
2a84cb98 AS |
224 | do { |
225 | /* don't sleep with disabled interrupts */ | |
226 | if (EC_FLAGS_MSI || irqs_disabled()) { | |
227 | udelay(ACPI_EC_MSI_UDELAY); | |
228 | if (ec_transaction_done(ec)) | |
229 | return 0; | |
230 | } else { | |
231 | if (wait_event_timeout(ec->wait, | |
232 | ec_transaction_done(ec), | |
233 | msecs_to_jiffies(1))) | |
234 | return 0; | |
235 | } | |
236 | advance_transaction(ec, acpi_ec_read_status(ec)); | |
237 | } while (time_before(jiffies, delay)); | |
16a26e85 | 238 | pr_debug("controller reset, restart transaction\n"); |
f351d027 | 239 | spin_lock_irqsave(&ec->lock, flags); |
2a84cb98 | 240 | start_transaction(ec); |
f351d027 | 241 | spin_unlock_irqrestore(&ec->lock, flags); |
af3fd140 | 242 | } |
b77d81b2 | 243 | return -ETIME; |
1da177e4 LT |
244 | } |
245 | ||
8463200a | 246 | static int acpi_ec_transaction_unlocked(struct acpi_ec *ec, |
2a84cb98 | 247 | struct transaction *t) |
45bea155 | 248 | { |
7c6db4e0 | 249 | unsigned long tmp; |
7c6db4e0 | 250 | int ret = 0; |
5423a0cb | 251 | if (EC_FLAGS_MSI) |
2a84cb98 | 252 | udelay(ACPI_EC_MSI_UDELAY); |
7c6db4e0 | 253 | /* start transaction */ |
f351d027 | 254 | spin_lock_irqsave(&ec->lock, tmp); |
7c6db4e0 | 255 | /* following two actions should be kept atomic */ |
8463200a | 256 | ec->curr = t; |
a2f93aea | 257 | start_transaction(ec); |
8463200a | 258 | if (ec->curr->command == ACPI_EC_COMMAND_QUERY) |
080e412c | 259 | clear_bit(EC_FLAGS_QUERY_PENDING, &ec->flags); |
f351d027 | 260 | spin_unlock_irqrestore(&ec->lock, tmp); |
2a84cb98 | 261 | ret = ec_poll(ec); |
f351d027 | 262 | spin_lock_irqsave(&ec->lock, tmp); |
8463200a | 263 | ec->curr = NULL; |
f351d027 | 264 | spin_unlock_irqrestore(&ec->lock, tmp); |
7c6db4e0 AS |
265 | return ret; |
266 | } | |
267 | ||
268 | static int ec_check_ibf0(struct acpi_ec *ec) | |
269 | { | |
270 | u8 status = acpi_ec_read_status(ec); | |
271 | return (status & ACPI_EC_FLAG_IBF) == 0; | |
45bea155 LY |
272 | } |
273 | ||
c0ff1772 AS |
274 | static int ec_wait_ibf0(struct acpi_ec *ec) |
275 | { | |
7a18e96d | 276 | unsigned long delay = jiffies + msecs_to_jiffies(ec_delay); |
c0ff1772 | 277 | /* interrupt wait manually if GPE mode is not active */ |
c0ff1772 | 278 | while (time_before(jiffies, delay)) |
2a84cb98 AS |
279 | if (wait_event_timeout(ec->wait, ec_check_ibf0(ec), |
280 | msecs_to_jiffies(1))) | |
c0ff1772 AS |
281 | return 0; |
282 | return -ETIME; | |
45bea155 LY |
283 | } |
284 | ||
2a84cb98 | 285 | static int acpi_ec_transaction(struct acpi_ec *ec, struct transaction *t) |
1da177e4 | 286 | { |
d7a76e4c | 287 | int status; |
50526df6 | 288 | u32 glk; |
8463200a | 289 | if (!ec || (!t) || (t->wlen && !t->wdata) || (t->rlen && !t->rdata)) |
d550d98d | 290 | return -EINVAL; |
8463200a AS |
291 | if (t->rdata) |
292 | memset(t->rdata, 0, t->rlen); | |
f351d027 | 293 | mutex_lock(&ec->mutex); |
fe955682 | 294 | if (test_bit(EC_FLAGS_BLOCKED, &ec->flags)) { |
f6bb13aa RW |
295 | status = -EINVAL; |
296 | goto unlock; | |
297 | } | |
703959d4 | 298 | if (ec->global_lock) { |
1da177e4 | 299 | status = acpi_acquire_global_lock(ACPI_EC_UDELAY_GLK, &glk); |
c24e912b | 300 | if (ACPI_FAILURE(status)) { |
7c6db4e0 AS |
301 | status = -ENODEV; |
302 | goto unlock; | |
c24e912b | 303 | } |
1da177e4 | 304 | } |
c0ff1772 | 305 | if (ec_wait_ibf0(ec)) { |
16a26e85 | 306 | pr_err("input buffer is not empty, " |
3ebe08a7 | 307 | "aborting transaction\n"); |
7c6db4e0 | 308 | status = -ETIME; |
451566f4 | 309 | goto end; |
716e084e | 310 | } |
16a26e85 | 311 | pr_debug("transaction start (cmd=0x%02x, addr=0x%02x)\n", |
b76b51ba | 312 | t->command, t->wdata ? t->wdata[0] : 0); |
a62e8f19 AS |
313 | /* disable GPE during transaction if storm is detected */ |
314 | if (test_bit(EC_FLAGS_GPE_STORM, &ec->flags)) { | |
3784730b RW |
315 | /* It has to be disabled, so that it doesn't trigger. */ |
316 | acpi_disable_gpe(NULL, ec->gpe); | |
a62e8f19 AS |
317 | } |
318 | ||
2a84cb98 | 319 | status = acpi_ec_transaction_unlocked(ec, t); |
a62e8f19 AS |
320 | |
321 | /* check if we received SCI during transaction */ | |
322 | ec_check_sci_sync(ec, acpi_ec_read_status(ec)); | |
323 | if (test_bit(EC_FLAGS_GPE_STORM, &ec->flags)) { | |
54070101 | 324 | msleep(1); |
3784730b RW |
325 | /* It is safe to enable the GPE outside of the transaction. */ |
326 | acpi_enable_gpe(NULL, ec->gpe); | |
a520d52e | 327 | } else if (t->irq_count > ec_storm_threshold) { |
16a26e85 | 328 | pr_info("GPE storm detected(%d GPEs), " |
b76b51ba FT |
329 | "transactions will use polling mode\n", |
330 | t->irq_count); | |
a62e8f19 AS |
331 | set_bit(EC_FLAGS_GPE_STORM, &ec->flags); |
332 | } | |
16a26e85 | 333 | pr_debug("transaction end\n"); |
7c6db4e0 | 334 | end: |
703959d4 | 335 | if (ec->global_lock) |
1da177e4 | 336 | acpi_release_global_lock(glk); |
7c6db4e0 | 337 | unlock: |
f351d027 | 338 | mutex_unlock(&ec->mutex); |
d550d98d | 339 | return status; |
1da177e4 LT |
340 | } |
341 | ||
8a383ef0 | 342 | static int acpi_ec_burst_enable(struct acpi_ec *ec) |
c45aac43 AS |
343 | { |
344 | u8 d; | |
8463200a AS |
345 | struct transaction t = {.command = ACPI_EC_BURST_ENABLE, |
346 | .wdata = NULL, .rdata = &d, | |
347 | .wlen = 0, .rlen = 1}; | |
348 | ||
2a84cb98 | 349 | return acpi_ec_transaction(ec, &t); |
c45aac43 AS |
350 | } |
351 | ||
8a383ef0 | 352 | static int acpi_ec_burst_disable(struct acpi_ec *ec) |
c45aac43 | 353 | { |
8463200a AS |
354 | struct transaction t = {.command = ACPI_EC_BURST_DISABLE, |
355 | .wdata = NULL, .rdata = NULL, | |
356 | .wlen = 0, .rlen = 0}; | |
357 | ||
7c6db4e0 | 358 | return (acpi_ec_read_status(ec) & ACPI_EC_FLAG_BURST) ? |
2a84cb98 | 359 | acpi_ec_transaction(ec, &t) : 0; |
c45aac43 AS |
360 | } |
361 | ||
6ccedb10 | 362 | static int acpi_ec_read(struct acpi_ec *ec, u8 address, u8 * data) |
3576cf61 DS |
363 | { |
364 | int result; | |
365 | u8 d; | |
8463200a AS |
366 | struct transaction t = {.command = ACPI_EC_COMMAND_READ, |
367 | .wdata = &address, .rdata = &d, | |
368 | .wlen = 1, .rlen = 1}; | |
3576cf61 | 369 | |
2a84cb98 | 370 | result = acpi_ec_transaction(ec, &t); |
3576cf61 DS |
371 | *data = d; |
372 | return result; | |
373 | } | |
6ffb221a | 374 | |
3576cf61 DS |
375 | static int acpi_ec_write(struct acpi_ec *ec, u8 address, u8 data) |
376 | { | |
6ccedb10 | 377 | u8 wdata[2] = { address, data }; |
8463200a AS |
378 | struct transaction t = {.command = ACPI_EC_COMMAND_WRITE, |
379 | .wdata = wdata, .rdata = NULL, | |
380 | .wlen = 2, .rlen = 0}; | |
381 | ||
2a84cb98 | 382 | return acpi_ec_transaction(ec, &t); |
3576cf61 DS |
383 | } |
384 | ||
b76b51ba | 385 | int ec_read(u8 addr, u8 *val) |
1da177e4 | 386 | { |
1da177e4 | 387 | int err; |
6ffb221a | 388 | u8 temp_data; |
1da177e4 LT |
389 | |
390 | if (!first_ec) | |
391 | return -ENODEV; | |
392 | ||
d033879c | 393 | err = acpi_ec_read(first_ec, addr, &temp_data); |
1da177e4 LT |
394 | |
395 | if (!err) { | |
396 | *val = temp_data; | |
397 | return 0; | |
50526df6 | 398 | } else |
1da177e4 LT |
399 | return err; |
400 | } | |
50526df6 | 401 | |
1da177e4 LT |
402 | EXPORT_SYMBOL(ec_read); |
403 | ||
50526df6 | 404 | int ec_write(u8 addr, u8 val) |
1da177e4 | 405 | { |
1da177e4 LT |
406 | int err; |
407 | ||
408 | if (!first_ec) | |
409 | return -ENODEV; | |
410 | ||
d033879c | 411 | err = acpi_ec_write(first_ec, addr, val); |
1da177e4 LT |
412 | |
413 | return err; | |
414 | } | |
50526df6 | 415 | |
1da177e4 LT |
416 | EXPORT_SYMBOL(ec_write); |
417 | ||
616362de | 418 | int ec_transaction(u8 command, |
9e197219 | 419 | const u8 * wdata, unsigned wdata_len, |
1cb7b1e0 | 420 | u8 * rdata, unsigned rdata_len) |
45bea155 | 421 | { |
8463200a AS |
422 | struct transaction t = {.command = command, |
423 | .wdata = wdata, .rdata = rdata, | |
424 | .wlen = wdata_len, .rlen = rdata_len}; | |
d7a76e4c LP |
425 | if (!first_ec) |
426 | return -ENODEV; | |
45bea155 | 427 | |
2a84cb98 | 428 | return acpi_ec_transaction(first_ec, &t); |
45bea155 | 429 | } |
1da177e4 | 430 | |
ab9e43c6 LP |
431 | EXPORT_SYMBOL(ec_transaction); |
432 | ||
3e2abc5a SF |
433 | /* Get the handle to the EC device */ |
434 | acpi_handle ec_get_handle(void) | |
435 | { | |
436 | if (!first_ec) | |
437 | return NULL; | |
438 | return first_ec->handle; | |
439 | } | |
440 | ||
441 | EXPORT_SYMBOL(ec_get_handle); | |
442 | ||
fe955682 | 443 | void acpi_ec_block_transactions(void) |
f6bb13aa RW |
444 | { |
445 | struct acpi_ec *ec = first_ec; | |
446 | ||
447 | if (!ec) | |
448 | return; | |
449 | ||
f351d027 | 450 | mutex_lock(&ec->mutex); |
f6bb13aa | 451 | /* Prevent transactions from being carried out */ |
fe955682 | 452 | set_bit(EC_FLAGS_BLOCKED, &ec->flags); |
f351d027 | 453 | mutex_unlock(&ec->mutex); |
f6bb13aa RW |
454 | } |
455 | ||
fe955682 | 456 | void acpi_ec_unblock_transactions(void) |
f6bb13aa RW |
457 | { |
458 | struct acpi_ec *ec = first_ec; | |
459 | ||
460 | if (!ec) | |
461 | return; | |
462 | ||
f351d027 | 463 | mutex_lock(&ec->mutex); |
f6bb13aa | 464 | /* Allow transactions to be carried out again */ |
fe955682 | 465 | clear_bit(EC_FLAGS_BLOCKED, &ec->flags); |
f351d027 | 466 | mutex_unlock(&ec->mutex); |
f6bb13aa RW |
467 | } |
468 | ||
fe955682 | 469 | void acpi_ec_unblock_transactions_early(void) |
d5a64513 RW |
470 | { |
471 | /* | |
472 | * Allow transactions to happen again (this function is called from | |
473 | * atomic context during wakeup, so we don't need to acquire the mutex). | |
474 | */ | |
475 | if (first_ec) | |
fe955682 | 476 | clear_bit(EC_FLAGS_BLOCKED, &first_ec->flags); |
d5a64513 RW |
477 | } |
478 | ||
a62e8f19 | 479 | static int acpi_ec_query_unlocked(struct acpi_ec *ec, u8 * data) |
3576cf61 DS |
480 | { |
481 | int result; | |
6ccedb10 | 482 | u8 d; |
8463200a AS |
483 | struct transaction t = {.command = ACPI_EC_COMMAND_QUERY, |
484 | .wdata = NULL, .rdata = &d, | |
485 | .wlen = 0, .rlen = 1}; | |
6ccedb10 AS |
486 | if (!ec || !data) |
487 | return -EINVAL; | |
6ccedb10 AS |
488 | /* |
489 | * Query the EC to find out which _Qxx method we need to evaluate. | |
490 | * Note that successful completion of the query causes the ACPI_EC_SCI | |
491 | * bit to be cleared (and thus clearing the interrupt source). | |
492 | */ | |
a62e8f19 | 493 | result = acpi_ec_transaction_unlocked(ec, &t); |
6ccedb10 AS |
494 | if (result) |
495 | return result; | |
6ccedb10 AS |
496 | if (!d) |
497 | return -ENODATA; | |
6ccedb10 AS |
498 | *data = d; |
499 | return 0; | |
1da177e4 LT |
500 | } |
501 | ||
1da177e4 LT |
502 | /* -------------------------------------------------------------------------- |
503 | Event Management | |
504 | -------------------------------------------------------------------------- */ | |
837012ed AS |
505 | int acpi_ec_add_query_handler(struct acpi_ec *ec, u8 query_bit, |
506 | acpi_handle handle, acpi_ec_query_func func, | |
507 | void *data) | |
508 | { | |
509 | struct acpi_ec_query_handler *handler = | |
510 | kzalloc(sizeof(struct acpi_ec_query_handler), GFP_KERNEL); | |
511 | if (!handler) | |
512 | return -ENOMEM; | |
513 | ||
514 | handler->query_bit = query_bit; | |
515 | handler->handle = handle; | |
516 | handler->func = func; | |
517 | handler->data = data; | |
f351d027 | 518 | mutex_lock(&ec->mutex); |
30c08574 | 519 | list_add(&handler->node, &ec->list); |
f351d027 | 520 | mutex_unlock(&ec->mutex); |
837012ed AS |
521 | return 0; |
522 | } | |
523 | ||
524 | EXPORT_SYMBOL_GPL(acpi_ec_add_query_handler); | |
525 | ||
526 | void acpi_ec_remove_query_handler(struct acpi_ec *ec, u8 query_bit) | |
527 | { | |
1544fdbc | 528 | struct acpi_ec_query_handler *handler, *tmp; |
f351d027 | 529 | mutex_lock(&ec->mutex); |
1544fdbc | 530 | list_for_each_entry_safe(handler, tmp, &ec->list, node) { |
837012ed AS |
531 | if (query_bit == handler->query_bit) { |
532 | list_del(&handler->node); | |
533 | kfree(handler); | |
837012ed AS |
534 | } |
535 | } | |
f351d027 | 536 | mutex_unlock(&ec->mutex); |
837012ed AS |
537 | } |
538 | ||
539 | EXPORT_SYMBOL_GPL(acpi_ec_remove_query_handler); | |
1da177e4 | 540 | |
a62e8f19 | 541 | static void acpi_ec_run(void *cxt) |
45bea155 | 542 | { |
a62e8f19 AS |
543 | struct acpi_ec_query_handler *handler = cxt; |
544 | if (!handler) | |
e41334c0 | 545 | return; |
16a26e85 | 546 | pr_debug("start query execution\n"); |
a62e8f19 AS |
547 | if (handler->func) |
548 | handler->func(handler->data); | |
549 | else if (handler->handle) | |
550 | acpi_evaluate_object(handler->handle, NULL, NULL, NULL); | |
16a26e85 | 551 | pr_debug("stop query execution\n"); |
a62e8f19 AS |
552 | kfree(handler); |
553 | } | |
554 | ||
555 | static int acpi_ec_sync_query(struct acpi_ec *ec) | |
556 | { | |
557 | u8 value = 0; | |
558 | int status; | |
559 | struct acpi_ec_query_handler *handler, *copy; | |
560 | if ((status = acpi_ec_query_unlocked(ec, &value))) | |
561 | return status; | |
837012ed AS |
562 | list_for_each_entry(handler, &ec->list, node) { |
563 | if (value == handler->query_bit) { | |
564 | /* have custom handler for this bit */ | |
a62e8f19 AS |
565 | copy = kmalloc(sizeof(*handler), GFP_KERNEL); |
566 | if (!copy) | |
567 | return -ENOMEM; | |
568 | memcpy(copy, handler, sizeof(*copy)); | |
16a26e85 LT |
569 | pr_debug("push query execution (0x%2x) on queue\n", |
570 | value); | |
f5347867 AS |
571 | return acpi_os_execute((copy->func) ? |
572 | OSL_NOTIFY_HANDLER : OSL_GPE_HANDLER, | |
a62e8f19 | 573 | acpi_ec_run, copy); |
837012ed AS |
574 | } |
575 | } | |
a62e8f19 AS |
576 | return 0; |
577 | } | |
578 | ||
579 | static void acpi_ec_gpe_query(void *ec_cxt) | |
580 | { | |
581 | struct acpi_ec *ec = ec_cxt; | |
582 | if (!ec) | |
583 | return; | |
f351d027 | 584 | mutex_lock(&ec->mutex); |
a62e8f19 | 585 | acpi_ec_sync_query(ec); |
f351d027 | 586 | mutex_unlock(&ec->mutex); |
45bea155 | 587 | } |
1da177e4 | 588 | |
a62e8f19 AS |
589 | static int ec_check_sci(struct acpi_ec *ec, u8 state) |
590 | { | |
591 | if (state & ACPI_EC_FLAG_SCI) { | |
592 | if (!test_and_set_bit(EC_FLAGS_QUERY_PENDING, &ec->flags)) { | |
16a26e85 | 593 | pr_debug("push gpe query to the queue\n"); |
a62e8f19 AS |
594 | return acpi_os_execute(OSL_NOTIFY_HANDLER, |
595 | acpi_ec_gpe_query, ec); | |
596 | } | |
597 | } | |
598 | return 0; | |
599 | } | |
600 | ||
8b6cd8ad LM |
601 | static u32 acpi_ec_gpe_handler(acpi_handle gpe_device, |
602 | u32 gpe_number, void *data) | |
1da177e4 | 603 | { |
3d02b90b | 604 | struct acpi_ec *ec = data; |
b76b51ba | 605 | u8 status = acpi_ec_read_status(ec); |
00eb43a1 | 606 | |
16a26e85 | 607 | pr_debug("~~~> interrupt, status:0x%02x\n", status); |
7c6db4e0 | 608 | |
b76b51ba | 609 | advance_transaction(ec, status); |
a62e8f19 AS |
610 | if (ec_transaction_done(ec) && |
611 | (acpi_ec_read_status(ec) & ACPI_EC_FLAG_IBF) == 0) { | |
2a84cb98 | 612 | wake_up(&ec->wait); |
a62e8f19 AS |
613 | ec_check_sci(ec, acpi_ec_read_status(ec)); |
614 | } | |
bba63a29 | 615 | return ACPI_INTERRUPT_HANDLED | ACPI_REENABLE_GPE; |
845625cd AS |
616 | } |
617 | ||
1da177e4 LT |
618 | /* -------------------------------------------------------------------------- |
619 | Address Space Management | |
620 | -------------------------------------------------------------------------- */ | |
621 | ||
1da177e4 | 622 | static acpi_status |
5b7734b4 | 623 | acpi_ec_space_handler(u32 function, acpi_physical_address address, |
dadf28a1 | 624 | u32 bits, u64 *value64, |
50526df6 | 625 | void *handler_context, void *region_context) |
1da177e4 | 626 | { |
3d02b90b | 627 | struct acpi_ec *ec = handler_context; |
dadf28a1 AS |
628 | int result = 0, i, bytes = bits / 8; |
629 | u8 *value = (u8 *)value64; | |
1da177e4 | 630 | |
1da177e4 | 631 | if ((address > 0xFF) || !value || !handler_context) |
d550d98d | 632 | return AE_BAD_PARAMETER; |
1da177e4 | 633 | |
5b7734b4 | 634 | if (function != ACPI_READ && function != ACPI_WRITE) |
d550d98d | 635 | return AE_BAD_PARAMETER; |
1da177e4 | 636 | |
dadf28a1 | 637 | if (EC_FLAGS_MSI || bits > 8) |
6a63b06f | 638 | acpi_ec_burst_enable(ec); |
b3b233c7 | 639 | |
dadf28a1 AS |
640 | for (i = 0; i < bytes; ++i, ++address, ++value) |
641 | result = (function == ACPI_READ) ? | |
642 | acpi_ec_read(ec, address, value) : | |
643 | acpi_ec_write(ec, address, *value); | |
1da177e4 | 644 | |
dadf28a1 | 645 | if (EC_FLAGS_MSI || bits > 8) |
6a63b06f | 646 | acpi_ec_burst_disable(ec); |
b3b233c7 | 647 | |
1da177e4 LT |
648 | switch (result) { |
649 | case -EINVAL: | |
d550d98d | 650 | return AE_BAD_PARAMETER; |
1da177e4 LT |
651 | break; |
652 | case -ENODEV: | |
d550d98d | 653 | return AE_NOT_FOUND; |
1da177e4 LT |
654 | break; |
655 | case -ETIME: | |
d550d98d | 656 | return AE_TIME; |
1da177e4 LT |
657 | break; |
658 | default: | |
d550d98d | 659 | return AE_OK; |
1da177e4 | 660 | } |
1da177e4 LT |
661 | } |
662 | ||
1da177e4 LT |
663 | /* -------------------------------------------------------------------------- |
664 | Driver Interface | |
665 | -------------------------------------------------------------------------- */ | |
c0900c35 AS |
666 | static acpi_status |
667 | ec_parse_io_ports(struct acpi_resource *resource, void *context); | |
668 | ||
c0900c35 AS |
669 | static struct acpi_ec *make_acpi_ec(void) |
670 | { | |
671 | struct acpi_ec *ec = kzalloc(sizeof(struct acpi_ec), GFP_KERNEL); | |
672 | if (!ec) | |
673 | return NULL; | |
080e412c | 674 | ec->flags = 1 << EC_FLAGS_QUERY_PENDING; |
f351d027 | 675 | mutex_init(&ec->mutex); |
c0900c35 | 676 | init_waitqueue_head(&ec->wait); |
837012ed | 677 | INIT_LIST_HEAD(&ec->list); |
f351d027 | 678 | spin_lock_init(&ec->lock); |
c0900c35 AS |
679 | return ec; |
680 | } | |
837012ed | 681 | |
c019b193 AS |
682 | static acpi_status |
683 | acpi_ec_register_query_methods(acpi_handle handle, u32 level, | |
684 | void *context, void **return_value) | |
685 | { | |
0175d562 LM |
686 | char node_name[5]; |
687 | struct acpi_buffer buffer = { sizeof(node_name), node_name }; | |
c019b193 AS |
688 | struct acpi_ec *ec = context; |
689 | int value = 0; | |
0175d562 LM |
690 | acpi_status status; |
691 | ||
692 | status = acpi_get_name(handle, ACPI_SINGLE_NAME, &buffer); | |
693 | ||
694 | if (ACPI_SUCCESS(status) && sscanf(node_name, "_Q%x", &value) == 1) { | |
c019b193 AS |
695 | acpi_ec_add_query_handler(ec, value, handle, NULL, NULL); |
696 | } | |
697 | return AE_OK; | |
698 | } | |
699 | ||
cd8c93a4 AS |
700 | static acpi_status |
701 | ec_parse_device(acpi_handle handle, u32 Level, void *context, void **retval) | |
837012ed | 702 | { |
cd8c93a4 | 703 | acpi_status status; |
d21cf3c1 | 704 | unsigned long long tmp = 0; |
cd8c93a4 AS |
705 | |
706 | struct acpi_ec *ec = context; | |
a5032bfd AS |
707 | |
708 | /* clear addr values, ec_parse_io_ports depend on it */ | |
709 | ec->command_addr = ec->data_addr = 0; | |
710 | ||
cd8c93a4 AS |
711 | status = acpi_walk_resources(handle, METHOD_NAME__CRS, |
712 | ec_parse_io_ports, ec); | |
713 | if (ACPI_FAILURE(status)) | |
714 | return status; | |
837012ed AS |
715 | |
716 | /* Get GPE bit assignment (EC events). */ | |
717 | /* TODO: Add support for _GPE returning a package */ | |
27663c58 | 718 | status = acpi_evaluate_integer(handle, "_GPE", NULL, &tmp); |
cd8c93a4 AS |
719 | if (ACPI_FAILURE(status)) |
720 | return status; | |
27663c58 | 721 | ec->gpe = tmp; |
837012ed | 722 | /* Use the global lock for all EC transactions? */ |
d21cf3c1 | 723 | tmp = 0; |
27663c58 MW |
724 | acpi_evaluate_integer(handle, "_GLK", NULL, &tmp); |
725 | ec->global_lock = tmp; | |
837012ed | 726 | ec->handle = handle; |
cd8c93a4 | 727 | return AE_CTRL_TERMINATE; |
837012ed AS |
728 | } |
729 | ||
5efc5476 BH |
730 | static int ec_install_handlers(struct acpi_ec *ec) |
731 | { | |
732 | acpi_status status; | |
733 | if (test_bit(EC_FLAGS_HANDLERS_INSTALLED, &ec->flags)) | |
734 | return 0; | |
735 | status = acpi_install_gpe_handler(NULL, ec->gpe, | |
736 | ACPI_GPE_EDGE_TRIGGERED, | |
737 | &acpi_ec_gpe_handler, ec); | |
738 | if (ACPI_FAILURE(status)) | |
739 | return -ENODEV; | |
9630bdd9 | 740 | |
a44061aa | 741 | acpi_enable_gpe(NULL, ec->gpe); |
5efc5476 BH |
742 | status = acpi_install_address_space_handler(ec->handle, |
743 | ACPI_ADR_SPACE_EC, | |
744 | &acpi_ec_space_handler, | |
745 | NULL, ec); | |
746 | if (ACPI_FAILURE(status)) { | |
747 | if (status == AE_NOT_FOUND) { | |
748 | /* | |
749 | * Maybe OS fails in evaluating the _REG object. | |
750 | * The AE_NOT_FOUND error will be ignored and OS | |
751 | * continue to initialize EC. | |
752 | */ | |
16a26e85 | 753 | pr_err("Fail in evaluating the _REG object" |
5efc5476 BH |
754 | " of EC device. Broken bios is suspected.\n"); |
755 | } else { | |
42b946bb | 756 | acpi_disable_gpe(NULL, ec->gpe); |
5efc5476 BH |
757 | acpi_remove_gpe_handler(NULL, ec->gpe, |
758 | &acpi_ec_gpe_handler); | |
759 | return -ENODEV; | |
760 | } | |
761 | } | |
762 | ||
763 | set_bit(EC_FLAGS_HANDLERS_INSTALLED, &ec->flags); | |
764 | return 0; | |
765 | } | |
766 | ||
4c611060 AS |
767 | static void ec_remove_handlers(struct acpi_ec *ec) |
768 | { | |
a44061aa | 769 | acpi_disable_gpe(NULL, ec->gpe); |
4c611060 AS |
770 | if (ACPI_FAILURE(acpi_remove_address_space_handler(ec->handle, |
771 | ACPI_ADR_SPACE_EC, &acpi_ec_space_handler))) | |
16a26e85 | 772 | pr_err("failed to remove space handler\n"); |
4c611060 AS |
773 | if (ACPI_FAILURE(acpi_remove_gpe_handler(NULL, ec->gpe, |
774 | &acpi_ec_gpe_handler))) | |
16a26e85 | 775 | pr_err("failed to remove gpe handler\n"); |
7c6db4e0 | 776 | clear_bit(EC_FLAGS_HANDLERS_INSTALLED, &ec->flags); |
4c611060 AS |
777 | } |
778 | ||
703959d4 | 779 | static int acpi_ec_add(struct acpi_device *device) |
1da177e4 | 780 | { |
703959d4 | 781 | struct acpi_ec *ec = NULL; |
d02be047 | 782 | int ret; |
45bea155 | 783 | |
c0900c35 AS |
784 | strcpy(acpi_device_name(device), ACPI_EC_DEVICE_NAME); |
785 | strcpy(acpi_device_class(device), ACPI_EC_CLASS); | |
786 | ||
4c611060 | 787 | /* Check for boot EC */ |
ce52ddf5 AS |
788 | if (boot_ec && |
789 | (boot_ec->handle == device->handle || | |
790 | boot_ec->handle == ACPI_ROOT_OBJECT)) { | |
791 | ec = boot_ec; | |
792 | boot_ec = NULL; | |
793 | } else { | |
794 | ec = make_acpi_ec(); | |
795 | if (!ec) | |
796 | return -ENOMEM; | |
a5032bfd AS |
797 | } |
798 | if (ec_parse_device(device->handle, 0, ec, NULL) != | |
799 | AE_CTRL_TERMINATE) { | |
ce52ddf5 AS |
800 | kfree(ec); |
801 | return -EINVAL; | |
4c611060 AS |
802 | } |
803 | ||
ce52ddf5 AS |
804 | /* Find and register all query methods */ |
805 | acpi_walk_namespace(ACPI_TYPE_METHOD, ec->handle, 1, | |
2263576c | 806 | acpi_ec_register_query_methods, NULL, ec, NULL); |
ce52ddf5 | 807 | |
4c611060 AS |
808 | if (!first_ec) |
809 | first_ec = ec; | |
db89b4f0 | 810 | device->driver_data = ec; |
de4f1046 | 811 | |
d6795fe3 AK |
812 | ret = !!request_region(ec->data_addr, 1, "EC data"); |
813 | WARN(!ret, "Could not request EC data io port 0x%lx", ec->data_addr); | |
814 | ret = !!request_region(ec->command_addr, 1, "EC cmd"); | |
815 | WARN(!ret, "Could not request EC cmd io port 0x%lx", ec->command_addr); | |
de4f1046 | 816 | |
16a26e85 | 817 | pr_info("GPE = 0x%lx, I/O: command/status = 0x%lx, data = 0x%lx\n", |
4c611060 | 818 | ec->gpe, ec->command_addr, ec->data_addr); |
5efc5476 BH |
819 | |
820 | ret = ec_install_handlers(ec); | |
821 | ||
822 | /* EC is fully operational, allow queries */ | |
823 | clear_bit(EC_FLAGS_QUERY_PENDING, &ec->flags); | |
824 | return ret; | |
1da177e4 LT |
825 | } |
826 | ||
51fac838 | 827 | static int acpi_ec_remove(struct acpi_device *device) |
1da177e4 | 828 | { |
01f22462 | 829 | struct acpi_ec *ec; |
07ddf768 | 830 | struct acpi_ec_query_handler *handler, *tmp; |
1da177e4 | 831 | |
1da177e4 | 832 | if (!device) |
d550d98d | 833 | return -EINVAL; |
1da177e4 LT |
834 | |
835 | ec = acpi_driver_data(device); | |
cf745ec7 | 836 | ec_remove_handlers(ec); |
f351d027 | 837 | mutex_lock(&ec->mutex); |
07ddf768 | 838 | list_for_each_entry_safe(handler, tmp, &ec->list, node) { |
837012ed AS |
839 | list_del(&handler->node); |
840 | kfree(handler); | |
841 | } | |
f351d027 | 842 | mutex_unlock(&ec->mutex); |
de4f1046 TR |
843 | release_region(ec->data_addr, 1); |
844 | release_region(ec->command_addr, 1); | |
db89b4f0 | 845 | device->driver_data = NULL; |
d033879c | 846 | if (ec == first_ec) |
c0900c35 | 847 | first_ec = NULL; |
4c611060 | 848 | kfree(ec); |
d550d98d | 849 | return 0; |
1da177e4 LT |
850 | } |
851 | ||
1da177e4 | 852 | static acpi_status |
c0900c35 | 853 | ec_parse_io_ports(struct acpi_resource *resource, void *context) |
1da177e4 | 854 | { |
3d02b90b | 855 | struct acpi_ec *ec = context; |
1da177e4 | 856 | |
01f22462 | 857 | if (resource->type != ACPI_RESOURCE_TYPE_IO) |
1da177e4 | 858 | return AE_OK; |
1da177e4 LT |
859 | |
860 | /* | |
861 | * The first address region returned is the data port, and | |
862 | * the second address region returned is the status/command | |
863 | * port. | |
864 | */ | |
de4f1046 | 865 | if (ec->data_addr == 0) |
6ffb221a | 866 | ec->data_addr = resource->data.io.minimum; |
de4f1046 | 867 | else if (ec->command_addr == 0) |
6ffb221a | 868 | ec->command_addr = resource->data.io.minimum; |
01f22462 | 869 | else |
1da177e4 | 870 | return AE_CTRL_TERMINATE; |
1da177e4 | 871 | |
1da177e4 LT |
872 | return AE_OK; |
873 | } | |
874 | ||
c04209a7 AS |
875 | int __init acpi_boot_ec_enable(void) |
876 | { | |
7c6db4e0 | 877 | if (!boot_ec || test_bit(EC_FLAGS_HANDLERS_INSTALLED, &boot_ec->flags)) |
c04209a7 AS |
878 | return 0; |
879 | if (!ec_install_handlers(boot_ec)) { | |
880 | first_ec = boot_ec; | |
881 | return 0; | |
882 | } | |
883 | return -EFAULT; | |
884 | } | |
885 | ||
223883b7 AS |
886 | static const struct acpi_device_id ec_device_ids[] = { |
887 | {"PNP0C09", 0}, | |
888 | {"", 0}, | |
889 | }; | |
890 | ||
478fa03b AS |
891 | /* Some BIOS do not survive early DSDT scan, skip it */ |
892 | static int ec_skip_dsdt_scan(const struct dmi_system_id *id) | |
893 | { | |
894 | EC_FLAGS_SKIP_DSDT_SCAN = 1; | |
895 | return 0; | |
896 | } | |
897 | ||
0adf3c74 AS |
898 | /* ASUStek often supplies us with broken ECDT, validate it */ |
899 | static int ec_validate_ecdt(const struct dmi_system_id *id) | |
900 | { | |
901 | EC_FLAGS_VALIDATE_ECDT = 1; | |
902 | return 0; | |
903 | } | |
904 | ||
905 | /* MSI EC needs special treatment, enable it */ | |
906 | static int ec_flag_msi(const struct dmi_system_id *id) | |
907 | { | |
16a26e85 | 908 | pr_debug("Detected MSI hardware, enabling workarounds.\n"); |
0adf3c74 AS |
909 | EC_FLAGS_MSI = 1; |
910 | EC_FLAGS_VALIDATE_ECDT = 1; | |
911 | return 0; | |
912 | } | |
913 | ||
67bfa9b6 FT |
914 | /* |
915 | * Clevo M720 notebook actually works ok with IRQ mode, if we lifted | |
916 | * the GPE storm threshold back to 20 | |
917 | */ | |
918 | static int ec_enlarge_storm_threshold(const struct dmi_system_id *id) | |
919 | { | |
920 | pr_debug("Setting the EC GPE storm threshold to 20\n"); | |
921 | ec_storm_threshold = 20; | |
922 | return 0; | |
923 | } | |
924 | ||
6cef7497 | 925 | static struct dmi_system_id ec_dmi_table[] __initdata = { |
478fa03b AS |
926 | { |
927 | ec_skip_dsdt_scan, "Compal JFL92", { | |
928 | DMI_MATCH(DMI_BIOS_VENDOR, "COMPAL"), | |
929 | DMI_MATCH(DMI_BOARD_NAME, "JFL92") }, NULL}, | |
0adf3c74 AS |
930 | { |
931 | ec_flag_msi, "MSI hardware", { | |
55b313f2 AS |
932 | DMI_MATCH(DMI_BIOS_VENDOR, "Micro-Star")}, NULL}, |
933 | { | |
934 | ec_flag_msi, "MSI hardware", { | |
935 | DMI_MATCH(DMI_SYS_VENDOR, "Micro-Star")}, NULL}, | |
936 | { | |
937 | ec_flag_msi, "MSI hardware", { | |
938 | DMI_MATCH(DMI_CHASSIS_VENDOR, "MICRO-Star")}, NULL}, | |
0adf3c74 | 939 | { |
a5dc4f89 AS |
940 | ec_flag_msi, "MSI hardware", { |
941 | DMI_MATCH(DMI_CHASSIS_VENDOR, "MICRO-STAR")}, NULL}, | |
942 | { | |
534bc4e3 ZR |
943 | ec_flag_msi, "Quanta hardware", { |
944 | DMI_MATCH(DMI_SYS_VENDOR, "Quanta"), | |
945 | DMI_MATCH(DMI_PRODUCT_NAME, "TW8/SW8/DW8"),}, NULL}, | |
946 | { | |
947 | ec_flag_msi, "Quanta hardware", { | |
948 | DMI_MATCH(DMI_SYS_VENDOR, "Quanta"), | |
949 | DMI_MATCH(DMI_PRODUCT_NAME, "TW9/SW9"),}, NULL}, | |
950 | { | |
0adf3c74 AS |
951 | ec_validate_ecdt, "ASUS hardware", { |
952 | DMI_MATCH(DMI_BIOS_VENDOR, "ASUS") }, NULL}, | |
af986d10 PC |
953 | { |
954 | ec_validate_ecdt, "ASUS hardware", { | |
955 | DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer Inc.") }, NULL}, | |
67bfa9b6 FT |
956 | { |
957 | ec_enlarge_storm_threshold, "CLEVO hardware", { | |
958 | DMI_MATCH(DMI_SYS_VENDOR, "CLEVO Co."), | |
959 | DMI_MATCH(DMI_PRODUCT_NAME, "M720T/M730T"),}, NULL}, | |
eff9a4b6 LT |
960 | { |
961 | ec_skip_dsdt_scan, "HP Folio 13", { | |
962 | DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), | |
963 | DMI_MATCH(DMI_PRODUCT_NAME, "HP Folio 13"),}, NULL}, | |
524f42fa LT |
964 | { |
965 | ec_validate_ecdt, "ASUS hardware", { | |
966 | DMI_MATCH(DMI_SYS_VENDOR, "ASUSTek Computer Inc."), | |
967 | DMI_MATCH(DMI_PRODUCT_NAME, "L4R"),}, NULL}, | |
0adf3c74 AS |
968 | {}, |
969 | }; | |
970 | ||
c0900c35 AS |
971 | int __init acpi_ec_ecdt_probe(void) |
972 | { | |
c0900c35 | 973 | acpi_status status; |
c6cb0e87 | 974 | struct acpi_ec *saved_ec = NULL; |
50526df6 | 975 | struct acpi_table_ecdt *ecdt_ptr; |
45bea155 | 976 | |
d66d969d AS |
977 | boot_ec = make_acpi_ec(); |
978 | if (!boot_ec) | |
c0900c35 AS |
979 | return -ENOMEM; |
980 | /* | |
981 | * Generate a boot ec context | |
982 | */ | |
0adf3c74 | 983 | dmi_check_system(ec_dmi_table); |
15a58ed1 AS |
984 | status = acpi_get_table(ACPI_SIG_ECDT, 1, |
985 | (struct acpi_table_header **)&ecdt_ptr); | |
cd8c93a4 | 986 | if (ACPI_SUCCESS(status)) { |
16a26e85 | 987 | pr_info("EC description table is found, configuring boot EC\n"); |
cd8c93a4 AS |
988 | boot_ec->command_addr = ecdt_ptr->control.address; |
989 | boot_ec->data_addr = ecdt_ptr->data.address; | |
990 | boot_ec->gpe = ecdt_ptr->gpe; | |
4af8e10a | 991 | boot_ec->handle = ACPI_ROOT_OBJECT; |
ce52ddf5 | 992 | acpi_get_handle(ACPI_ROOT_OBJECT, ecdt_ptr->id, &boot_ec->handle); |
c6cb0e87 | 993 | /* Don't trust ECDT, which comes from ASUSTek */ |
0adf3c74 | 994 | if (!EC_FLAGS_VALIDATE_ECDT) |
c5279dee | 995 | goto install; |
d6bd535d | 996 | saved_ec = kmemdup(boot_ec, sizeof(struct acpi_ec), GFP_KERNEL); |
c6cb0e87 AS |
997 | if (!saved_ec) |
998 | return -ENOMEM; | |
c5279dee | 999 | /* fall through */ |
cd8c93a4 | 1000 | } |
0adf3c74 | 1001 | |
478fa03b AS |
1002 | if (EC_FLAGS_SKIP_DSDT_SCAN) |
1003 | return -ENODEV; | |
1004 | ||
c5279dee AS |
1005 | /* This workaround is needed only on some broken machines, |
1006 | * which require early EC, but fail to provide ECDT */ | |
16a26e85 | 1007 | pr_debug("Look up EC in DSDT\n"); |
c5279dee AS |
1008 | status = acpi_get_devices(ec_device_ids[0].id, ec_parse_device, |
1009 | boot_ec, NULL); | |
1010 | /* Check that acpi_get_devices actually find something */ | |
1011 | if (ACPI_FAILURE(status) || !boot_ec->handle) | |
1012 | goto error; | |
c6cb0e87 AS |
1013 | if (saved_ec) { |
1014 | /* try to find good ECDT from ASUSTek */ | |
1015 | if (saved_ec->command_addr != boot_ec->command_addr || | |
1016 | saved_ec->data_addr != boot_ec->data_addr || | |
1017 | saved_ec->gpe != boot_ec->gpe || | |
1018 | saved_ec->handle != boot_ec->handle) | |
16a26e85 | 1019 | pr_info("ASUSTek keeps feeding us with broken " |
c6cb0e87 AS |
1020 | "ECDT tables, which are very hard to workaround. " |
1021 | "Trying to use DSDT EC info instead. Please send " | |
1022 | "output of acpidump to linux-acpi@vger.kernel.org\n"); | |
1023 | kfree(saved_ec); | |
1024 | saved_ec = NULL; | |
1025 | } else { | |
1026 | /* We really need to limit this workaround, the only ASUS, | |
1027 | * which needs it, has fake EC._INI method, so use it as flag. | |
1028 | * Keep boot_ec struct as it will be needed soon. | |
1029 | */ | |
c6cb0e87 | 1030 | if (!dmi_name_in_vendors("ASUS") || |
952c63e9 | 1031 | !acpi_has_method(boot_ec->handle, "_INI")) |
c6cb0e87 AS |
1032 | return -ENODEV; |
1033 | } | |
c5279dee AS |
1034 | install: |
1035 | if (!ec_install_handlers(boot_ec)) { | |
d033879c | 1036 | first_ec = boot_ec; |
e8284321 | 1037 | return 0; |
d033879c | 1038 | } |
c5279dee | 1039 | error: |
d66d969d AS |
1040 | kfree(boot_ec); |
1041 | boot_ec = NULL; | |
1da177e4 LT |
1042 | return -ENODEV; |
1043 | } | |
1044 | ||
223883b7 AS |
1045 | static struct acpi_driver acpi_ec_driver = { |
1046 | .name = "ec", | |
1047 | .class = ACPI_EC_CLASS, | |
1048 | .ids = ec_device_ids, | |
1049 | .ops = { | |
1050 | .add = acpi_ec_add, | |
1051 | .remove = acpi_ec_remove, | |
223883b7 AS |
1052 | }, |
1053 | }; | |
1054 | ||
a5f820fe | 1055 | int __init acpi_ec_init(void) |
1da177e4 | 1056 | { |
50526df6 | 1057 | int result = 0; |
1da177e4 | 1058 | |
1da177e4 LT |
1059 | /* Now register the driver for the EC */ |
1060 | result = acpi_bus_register_driver(&acpi_ec_driver); | |
49c6c5ff | 1061 | if (result < 0) |
d550d98d | 1062 | return -ENODEV; |
1da177e4 | 1063 | |
d550d98d | 1064 | return result; |
1da177e4 LT |
1065 | } |
1066 | ||
1da177e4 LT |
1067 | /* EC driver currently not unloadable */ |
1068 | #if 0 | |
50526df6 | 1069 | static void __exit acpi_ec_exit(void) |
1da177e4 | 1070 | { |
1da177e4 LT |
1071 | |
1072 | acpi_bus_unregister_driver(&acpi_ec_driver); | |
d550d98d | 1073 | return; |
1da177e4 | 1074 | } |
7843932a | 1075 | #endif /* 0 */ |