Commit | Line | Data |
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1da177e4 LT |
1 | |
2 | /******************************************************************************* | |
3 | * | |
4 | * Module Name: hwregs - Read/write access functions for the various ACPI | |
5 | * control and status registers. | |
6 | * | |
7 | ******************************************************************************/ | |
8 | ||
9 | /* | |
4a90c7e8 | 10 | * Copyright (C) 2000 - 2006, R. Byron Moore |
1da177e4 LT |
11 | * All rights reserved. |
12 | * | |
13 | * Redistribution and use in source and binary forms, with or without | |
14 | * modification, are permitted provided that the following conditions | |
15 | * are met: | |
16 | * 1. Redistributions of source code must retain the above copyright | |
17 | * notice, this list of conditions, and the following disclaimer, | |
18 | * without modification. | |
19 | * 2. Redistributions in binary form must reproduce at minimum a disclaimer | |
20 | * substantially similar to the "NO WARRANTY" disclaimer below | |
21 | * ("Disclaimer") and any redistribution must be conditioned upon | |
22 | * including a substantially similar Disclaimer requirement for further | |
23 | * binary redistribution. | |
24 | * 3. Neither the names of the above-listed copyright holders nor the names | |
25 | * of any contributors may be used to endorse or promote products derived | |
26 | * from this software without specific prior written permission. | |
27 | * | |
28 | * Alternatively, this software may be distributed under the terms of the | |
29 | * GNU General Public License ("GPL") version 2 as published by the Free | |
30 | * Software Foundation. | |
31 | * | |
32 | * NO WARRANTY | |
33 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | |
34 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | |
35 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR | |
36 | * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT | |
37 | * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
38 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
39 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
40 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, | |
41 | * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING | |
42 | * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE | |
43 | * POSSIBILITY OF SUCH DAMAGES. | |
44 | */ | |
45 | ||
1da177e4 LT |
46 | #include <acpi/acpi.h> |
47 | #include <acpi/acnamesp.h> | |
48 | #include <acpi/acevents.h> | |
49 | ||
50 | #define _COMPONENT ACPI_HARDWARE | |
4be44fcd | 51 | ACPI_MODULE_NAME("hwregs") |
1da177e4 LT |
52 | |
53 | /******************************************************************************* | |
54 | * | |
55 | * FUNCTION: acpi_hw_clear_acpi_status | |
56 | * | |
57 | * PARAMETERS: Flags - Lock the hardware or not | |
58 | * | |
59 | * RETURN: none | |
60 | * | |
61 | * DESCRIPTION: Clears all fixed and general purpose status bits | |
62 | * THIS FUNCTION MUST BE CALLED WITH INTERRUPTS DISABLED | |
63 | * | |
64 | ******************************************************************************/ | |
4be44fcd | 65 | acpi_status acpi_hw_clear_acpi_status(u32 flags) |
1da177e4 | 66 | { |
4be44fcd | 67 | acpi_status status; |
1da177e4 | 68 | |
b229cf92 | 69 | ACPI_FUNCTION_TRACE(hw_clear_acpi_status); |
1da177e4 | 70 | |
4be44fcd LB |
71 | ACPI_DEBUG_PRINT((ACPI_DB_IO, "About to write %04X to %04X\n", |
72 | ACPI_BITMASK_ALL_FIXED_STATUS, | |
73 | (u16) acpi_gbl_FADT->xpm1a_evt_blk.address)); | |
1da177e4 LT |
74 | |
75 | if (flags & ACPI_MTX_LOCK) { | |
4be44fcd LB |
76 | status = acpi_ut_acquire_mutex(ACPI_MTX_HARDWARE); |
77 | if (ACPI_FAILURE(status)) { | |
78 | return_ACPI_STATUS(status); | |
1da177e4 LT |
79 | } |
80 | } | |
81 | ||
4be44fcd LB |
82 | status = acpi_hw_register_write(ACPI_MTX_DO_NOT_LOCK, |
83 | ACPI_REGISTER_PM1_STATUS, | |
84 | ACPI_BITMASK_ALL_FIXED_STATUS); | |
85 | if (ACPI_FAILURE(status)) { | |
1da177e4 LT |
86 | goto unlock_and_exit; |
87 | } | |
88 | ||
89 | /* Clear the fixed events */ | |
90 | ||
91 | if (acpi_gbl_FADT->xpm1b_evt_blk.address) { | |
4be44fcd LB |
92 | status = |
93 | acpi_hw_low_level_write(16, ACPI_BITMASK_ALL_FIXED_STATUS, | |
94 | &acpi_gbl_FADT->xpm1b_evt_blk); | |
95 | if (ACPI_FAILURE(status)) { | |
1da177e4 LT |
96 | goto unlock_and_exit; |
97 | } | |
98 | } | |
99 | ||
100 | /* Clear the GPE Bits in all GPE registers in all GPE blocks */ | |
101 | ||
4be44fcd | 102 | status = acpi_ev_walk_gpe_list(acpi_hw_clear_gpe_block); |
1da177e4 | 103 | |
4be44fcd | 104 | unlock_and_exit: |
1da177e4 | 105 | if (flags & ACPI_MTX_LOCK) { |
4be44fcd | 106 | (void)acpi_ut_release_mutex(ACPI_MTX_HARDWARE); |
1da177e4 | 107 | } |
4be44fcd | 108 | return_ACPI_STATUS(status); |
1da177e4 LT |
109 | } |
110 | ||
1da177e4 LT |
111 | /******************************************************************************* |
112 | * | |
113 | * FUNCTION: acpi_get_sleep_type_data | |
114 | * | |
115 | * PARAMETERS: sleep_state - Numeric sleep state | |
116 | * *sleep_type_a - Where SLP_TYPa is returned | |
117 | * *sleep_type_b - Where SLP_TYPb is returned | |
118 | * | |
119 | * RETURN: Status - ACPI status | |
120 | * | |
121 | * DESCRIPTION: Obtain the SLP_TYPa and SLP_TYPb values for the requested sleep | |
122 | * state. | |
123 | * | |
124 | ******************************************************************************/ | |
125 | ||
126 | acpi_status | |
4be44fcd | 127 | acpi_get_sleep_type_data(u8 sleep_state, u8 * sleep_type_a, u8 * sleep_type_b) |
1da177e4 | 128 | { |
4be44fcd LB |
129 | acpi_status status = AE_OK; |
130 | struct acpi_parameter_info info; | |
131 | char *sleep_state_name; | |
1da177e4 | 132 | |
b229cf92 | 133 | ACPI_FUNCTION_TRACE(acpi_get_sleep_type_data); |
1da177e4 | 134 | |
44f6c012 RM |
135 | /* Validate parameters */ |
136 | ||
4be44fcd LB |
137 | if ((sleep_state > ACPI_S_STATES_MAX) || !sleep_type_a || !sleep_type_b) { |
138 | return_ACPI_STATUS(AE_BAD_PARAMETER); | |
1da177e4 LT |
139 | } |
140 | ||
44f6c012 RM |
141 | /* Evaluate the namespace object containing the values for this state */ |
142 | ||
1da177e4 | 143 | info.parameters = NULL; |
44f6c012 | 144 | info.return_object = NULL; |
defba1d8 BM |
145 | sleep_state_name = |
146 | ACPI_CAST_PTR(char, acpi_gbl_sleep_state_names[sleep_state]); | |
44f6c012 | 147 | |
4be44fcd LB |
148 | status = acpi_ns_evaluate_by_name(sleep_state_name, &info); |
149 | if (ACPI_FAILURE(status)) { | |
150 | ACPI_DEBUG_PRINT((ACPI_DB_EXEC, | |
b229cf92 | 151 | "%s while evaluating SleepState [%s]\n", |
4be44fcd LB |
152 | acpi_format_exception(status), |
153 | sleep_state_name)); | |
1da177e4 | 154 | |
4be44fcd | 155 | return_ACPI_STATUS(status); |
1da177e4 LT |
156 | } |
157 | ||
158 | /* Must have a return object */ | |
159 | ||
160 | if (!info.return_object) { | |
b8e4d893 BM |
161 | ACPI_ERROR((AE_INFO, "No Sleep State object returned from [%s]", |
162 | sleep_state_name)); | |
1da177e4 LT |
163 | status = AE_NOT_EXIST; |
164 | } | |
165 | ||
166 | /* It must be of type Package */ | |
167 | ||
4be44fcd | 168 | else if (ACPI_GET_OBJECT_TYPE(info.return_object) != ACPI_TYPE_PACKAGE) { |
b8e4d893 BM |
169 | ACPI_ERROR((AE_INFO, |
170 | "Sleep State return object is not a Package")); | |
1da177e4 LT |
171 | status = AE_AML_OPERAND_TYPE; |
172 | } | |
173 | ||
44f6c012 RM |
174 | /* |
175 | * The package must have at least two elements. NOTE (March 2005): This | |
176 | * goes against the current ACPI spec which defines this object as a | |
177 | * package with one encoded DWORD element. However, existing practice | |
178 | * by BIOS vendors seems to be to have 2 or more elements, at least | |
179 | * one per sleep type (A/B). | |
180 | */ | |
1da177e4 | 181 | else if (info.return_object->package.count < 2) { |
b8e4d893 BM |
182 | ACPI_ERROR((AE_INFO, |
183 | "Sleep State return package does not have at least two elements")); | |
1da177e4 LT |
184 | status = AE_AML_NO_OPERAND; |
185 | } | |
186 | ||
187 | /* The first two elements must both be of type Integer */ | |
188 | ||
4be44fcd LB |
189 | else if ((ACPI_GET_OBJECT_TYPE(info.return_object->package.elements[0]) |
190 | != ACPI_TYPE_INTEGER) || | |
191 | (ACPI_GET_OBJECT_TYPE(info.return_object->package.elements[1]) | |
192 | != ACPI_TYPE_INTEGER)) { | |
b8e4d893 BM |
193 | ACPI_ERROR((AE_INFO, |
194 | "Sleep State return package elements are not both Integers (%s, %s)", | |
195 | acpi_ut_get_object_type_name(info.return_object-> | |
196 | package.elements[0]), | |
197 | acpi_ut_get_object_type_name(info.return_object-> | |
198 | package.elements[1]))); | |
1da177e4 | 199 | status = AE_AML_OPERAND_TYPE; |
4be44fcd | 200 | } else { |
44f6c012 RM |
201 | /* Valid _Sx_ package size, type, and value */ |
202 | ||
203 | *sleep_type_a = (u8) | |
4be44fcd | 204 | (info.return_object->package.elements[0])->integer.value; |
44f6c012 | 205 | *sleep_type_b = (u8) |
4be44fcd | 206 | (info.return_object->package.elements[1])->integer.value; |
1da177e4 LT |
207 | } |
208 | ||
4be44fcd | 209 | if (ACPI_FAILURE(status)) { |
b8e4d893 | 210 | ACPI_EXCEPTION((AE_INFO, status, |
b229cf92 | 211 | "While evaluating SleepState [%s], bad Sleep object %p type %s", |
b8e4d893 BM |
212 | sleep_state_name, info.return_object, |
213 | acpi_ut_get_object_type_name(info. | |
214 | return_object))); | |
1da177e4 LT |
215 | } |
216 | ||
4be44fcd LB |
217 | acpi_ut_remove_reference(info.return_object); |
218 | return_ACPI_STATUS(status); | |
1da177e4 | 219 | } |
1da177e4 | 220 | |
8313524a | 221 | ACPI_EXPORT_SYMBOL(acpi_get_sleep_type_data) |
1da177e4 LT |
222 | |
223 | /******************************************************************************* | |
224 | * | |
225 | * FUNCTION: acpi_hw_get_register_bit_mask | |
226 | * | |
227 | * PARAMETERS: register_id - Index of ACPI Register to access | |
228 | * | |
44f6c012 | 229 | * RETURN: The bitmask to be used when accessing the register |
1da177e4 | 230 | * |
44f6c012 | 231 | * DESCRIPTION: Map register_id into a register bitmask. |
1da177e4 LT |
232 | * |
233 | ******************************************************************************/ | |
4be44fcd | 234 | struct acpi_bit_register_info *acpi_hw_get_bit_register_info(u32 register_id) |
1da177e4 | 235 | { |
4a90c7e8 | 236 | ACPI_FUNCTION_ENTRY(); |
1da177e4 LT |
237 | |
238 | if (register_id > ACPI_BITREG_MAX) { | |
b229cf92 | 239 | ACPI_ERROR((AE_INFO, "Invalid BitRegister ID: %X", |
b8e4d893 | 240 | register_id)); |
1da177e4 LT |
241 | return (NULL); |
242 | } | |
243 | ||
244 | return (&acpi_gbl_bit_register_info[register_id]); | |
245 | } | |
246 | ||
1da177e4 LT |
247 | /******************************************************************************* |
248 | * | |
249 | * FUNCTION: acpi_get_register | |
250 | * | |
251 | * PARAMETERS: register_id - ID of ACPI bit_register to access | |
252 | * return_value - Value that was read from the register | |
253 | * Flags - Lock the hardware or not | |
254 | * | |
255 | * RETURN: Status and the value read from specified Register. Value | |
256 | * returned is normalized to bit0 (is shifted all the way right) | |
257 | * | |
258 | * DESCRIPTION: ACPI bit_register read function. | |
259 | * | |
260 | ******************************************************************************/ | |
261 | ||
4be44fcd | 262 | acpi_status acpi_get_register(u32 register_id, u32 * return_value, u32 flags) |
1da177e4 | 263 | { |
4be44fcd LB |
264 | u32 register_value = 0; |
265 | struct acpi_bit_register_info *bit_reg_info; | |
266 | acpi_status status; | |
1da177e4 | 267 | |
b229cf92 | 268 | ACPI_FUNCTION_TRACE(acpi_get_register); |
1da177e4 LT |
269 | |
270 | /* Get the info structure corresponding to the requested ACPI Register */ | |
271 | ||
4be44fcd | 272 | bit_reg_info = acpi_hw_get_bit_register_info(register_id); |
1da177e4 | 273 | if (!bit_reg_info) { |
4be44fcd | 274 | return_ACPI_STATUS(AE_BAD_PARAMETER); |
1da177e4 LT |
275 | } |
276 | ||
277 | if (flags & ACPI_MTX_LOCK) { | |
4be44fcd LB |
278 | status = acpi_ut_acquire_mutex(ACPI_MTX_HARDWARE); |
279 | if (ACPI_FAILURE(status)) { | |
280 | return_ACPI_STATUS(status); | |
1da177e4 LT |
281 | } |
282 | } | |
283 | ||
284 | /* Read from the register */ | |
285 | ||
4be44fcd LB |
286 | status = acpi_hw_register_read(ACPI_MTX_DO_NOT_LOCK, |
287 | bit_reg_info->parent_register, | |
288 | ®ister_value); | |
1da177e4 LT |
289 | |
290 | if (flags & ACPI_MTX_LOCK) { | |
4be44fcd | 291 | (void)acpi_ut_release_mutex(ACPI_MTX_HARDWARE); |
1da177e4 LT |
292 | } |
293 | ||
4be44fcd | 294 | if (ACPI_SUCCESS(status)) { |
52fc0b02 | 295 | |
1da177e4 LT |
296 | /* Normalize the value that was read */ |
297 | ||
4be44fcd LB |
298 | register_value = |
299 | ((register_value & bit_reg_info->access_bit_mask) | |
300 | >> bit_reg_info->bit_position); | |
1da177e4 LT |
301 | |
302 | *return_value = register_value; | |
303 | ||
4be44fcd LB |
304 | ACPI_DEBUG_PRINT((ACPI_DB_IO, "Read value %8.8X register %X\n", |
305 | register_value, | |
306 | bit_reg_info->parent_register)); | |
1da177e4 LT |
307 | } |
308 | ||
4be44fcd | 309 | return_ACPI_STATUS(status); |
1da177e4 | 310 | } |
1da177e4 | 311 | |
8313524a | 312 | ACPI_EXPORT_SYMBOL(acpi_get_register) |
1da177e4 LT |
313 | |
314 | /******************************************************************************* | |
315 | * | |
316 | * FUNCTION: acpi_set_register | |
317 | * | |
318 | * PARAMETERS: register_id - ID of ACPI bit_register to access | |
319 | * Value - (only used on write) value to write to the | |
320 | * Register, NOT pre-normalized to the bit pos | |
321 | * Flags - Lock the hardware or not | |
322 | * | |
323 | * RETURN: Status | |
324 | * | |
325 | * DESCRIPTION: ACPI Bit Register write function. | |
326 | * | |
327 | ******************************************************************************/ | |
4be44fcd | 328 | acpi_status acpi_set_register(u32 register_id, u32 value, u32 flags) |
1da177e4 | 329 | { |
4be44fcd LB |
330 | u32 register_value = 0; |
331 | struct acpi_bit_register_info *bit_reg_info; | |
332 | acpi_status status; | |
1da177e4 | 333 | |
b229cf92 | 334 | ACPI_FUNCTION_TRACE_U32(acpi_set_register, register_id); |
1da177e4 LT |
335 | |
336 | /* Get the info structure corresponding to the requested ACPI Register */ | |
337 | ||
4be44fcd | 338 | bit_reg_info = acpi_hw_get_bit_register_info(register_id); |
1da177e4 | 339 | if (!bit_reg_info) { |
b229cf92 | 340 | ACPI_ERROR((AE_INFO, "Bad ACPI HW RegisterId: %X", |
b8e4d893 | 341 | register_id)); |
4be44fcd | 342 | return_ACPI_STATUS(AE_BAD_PARAMETER); |
1da177e4 LT |
343 | } |
344 | ||
345 | if (flags & ACPI_MTX_LOCK) { | |
4be44fcd LB |
346 | status = acpi_ut_acquire_mutex(ACPI_MTX_HARDWARE); |
347 | if (ACPI_FAILURE(status)) { | |
348 | return_ACPI_STATUS(status); | |
1da177e4 LT |
349 | } |
350 | } | |
351 | ||
352 | /* Always do a register read first so we can insert the new bits */ | |
353 | ||
4be44fcd LB |
354 | status = acpi_hw_register_read(ACPI_MTX_DO_NOT_LOCK, |
355 | bit_reg_info->parent_register, | |
356 | ®ister_value); | |
357 | if (ACPI_FAILURE(status)) { | |
1da177e4 LT |
358 | goto unlock_and_exit; |
359 | } | |
360 | ||
361 | /* | |
362 | * Decode the Register ID | |
363 | * Register ID = [Register block ID] | [bit ID] | |
364 | * | |
365 | * Check bit ID to fine locate Register offset. | |
366 | * Check Mask to determine Register offset, and then read-write. | |
367 | */ | |
368 | switch (bit_reg_info->parent_register) { | |
369 | case ACPI_REGISTER_PM1_STATUS: | |
370 | ||
371 | /* | |
372 | * Status Registers are different from the rest. Clear by | |
373 | * writing 1, and writing 0 has no effect. So, the only relevant | |
374 | * information is the single bit we're interested in, all others should | |
375 | * be written as 0 so they will be left unchanged. | |
376 | */ | |
4be44fcd LB |
377 | value = ACPI_REGISTER_PREPARE_BITS(value, |
378 | bit_reg_info->bit_position, | |
379 | bit_reg_info-> | |
380 | access_bit_mask); | |
1da177e4 | 381 | if (value) { |
4be44fcd LB |
382 | status = acpi_hw_register_write(ACPI_MTX_DO_NOT_LOCK, |
383 | ACPI_REGISTER_PM1_STATUS, | |
384 | (u16) value); | |
1da177e4 LT |
385 | register_value = 0; |
386 | } | |
387 | break; | |
388 | ||
1da177e4 LT |
389 | case ACPI_REGISTER_PM1_ENABLE: |
390 | ||
4be44fcd LB |
391 | ACPI_REGISTER_INSERT_VALUE(register_value, |
392 | bit_reg_info->bit_position, | |
393 | bit_reg_info->access_bit_mask, | |
394 | value); | |
1da177e4 | 395 | |
4be44fcd LB |
396 | status = acpi_hw_register_write(ACPI_MTX_DO_NOT_LOCK, |
397 | ACPI_REGISTER_PM1_ENABLE, | |
398 | (u16) register_value); | |
1da177e4 LT |
399 | break; |
400 | ||
1da177e4 LT |
401 | case ACPI_REGISTER_PM1_CONTROL: |
402 | ||
403 | /* | |
404 | * Write the PM1 Control register. | |
405 | * Note that at this level, the fact that there are actually TWO | |
406 | * registers (A and B - and B may not exist) is abstracted. | |
407 | */ | |
4be44fcd LB |
408 | ACPI_DEBUG_PRINT((ACPI_DB_IO, "PM1 control: Read %X\n", |
409 | register_value)); | |
1da177e4 | 410 | |
4be44fcd LB |
411 | ACPI_REGISTER_INSERT_VALUE(register_value, |
412 | bit_reg_info->bit_position, | |
413 | bit_reg_info->access_bit_mask, | |
414 | value); | |
1da177e4 | 415 | |
4be44fcd LB |
416 | status = acpi_hw_register_write(ACPI_MTX_DO_NOT_LOCK, |
417 | ACPI_REGISTER_PM1_CONTROL, | |
418 | (u16) register_value); | |
1da177e4 LT |
419 | break; |
420 | ||
1da177e4 LT |
421 | case ACPI_REGISTER_PM2_CONTROL: |
422 | ||
4be44fcd LB |
423 | status = acpi_hw_register_read(ACPI_MTX_DO_NOT_LOCK, |
424 | ACPI_REGISTER_PM2_CONTROL, | |
425 | ®ister_value); | |
426 | if (ACPI_FAILURE(status)) { | |
1da177e4 LT |
427 | goto unlock_and_exit; |
428 | } | |
429 | ||
4be44fcd LB |
430 | ACPI_DEBUG_PRINT((ACPI_DB_IO, |
431 | "PM2 control: Read %X from %8.8X%8.8X\n", | |
432 | register_value, | |
433 | ACPI_FORMAT_UINT64(acpi_gbl_FADT-> | |
434 | xpm2_cnt_blk.address))); | |
435 | ||
436 | ACPI_REGISTER_INSERT_VALUE(register_value, | |
437 | bit_reg_info->bit_position, | |
438 | bit_reg_info->access_bit_mask, | |
439 | value); | |
440 | ||
441 | ACPI_DEBUG_PRINT((ACPI_DB_IO, | |
442 | "About to write %4.4X to %8.8X%8.8X\n", | |
443 | register_value, | |
444 | ACPI_FORMAT_UINT64(acpi_gbl_FADT-> | |
445 | xpm2_cnt_blk.address))); | |
446 | ||
447 | status = acpi_hw_register_write(ACPI_MTX_DO_NOT_LOCK, | |
448 | ACPI_REGISTER_PM2_CONTROL, | |
449 | (u8) (register_value)); | |
1da177e4 LT |
450 | break; |
451 | ||
1da177e4 LT |
452 | default: |
453 | break; | |
454 | } | |
455 | ||
4be44fcd | 456 | unlock_and_exit: |
1da177e4 LT |
457 | |
458 | if (flags & ACPI_MTX_LOCK) { | |
4be44fcd | 459 | (void)acpi_ut_release_mutex(ACPI_MTX_HARDWARE); |
1da177e4 LT |
460 | } |
461 | ||
462 | /* Normalize the value that was read */ | |
463 | ||
4be44fcd LB |
464 | ACPI_DEBUG_EXEC(register_value = |
465 | ((register_value & bit_reg_info->access_bit_mask) >> | |
466 | bit_reg_info->bit_position)); | |
1da177e4 | 467 | |
4be44fcd LB |
468 | ACPI_DEBUG_PRINT((ACPI_DB_IO, |
469 | "Set bits: %8.8X actual %8.8X register %X\n", value, | |
470 | register_value, bit_reg_info->parent_register)); | |
471 | return_ACPI_STATUS(status); | |
1da177e4 | 472 | } |
1da177e4 | 473 | |
8313524a | 474 | ACPI_EXPORT_SYMBOL(acpi_set_register) |
1da177e4 LT |
475 | |
476 | /****************************************************************************** | |
477 | * | |
478 | * FUNCTION: acpi_hw_register_read | |
479 | * | |
480 | * PARAMETERS: use_lock - Mutex hw access | |
481 | * register_id - register_iD + Offset | |
44f6c012 | 482 | * return_value - Where the register value is returned |
1da177e4 LT |
483 | * |
484 | * RETURN: Status and the value read. | |
485 | * | |
486 | * DESCRIPTION: Acpi register read function. Registers are read at the | |
487 | * given offset. | |
488 | * | |
489 | ******************************************************************************/ | |
1da177e4 | 490 | acpi_status |
4be44fcd | 491 | acpi_hw_register_read(u8 use_lock, u32 register_id, u32 * return_value) |
1da177e4 | 492 | { |
4be44fcd LB |
493 | u32 value1 = 0; |
494 | u32 value2 = 0; | |
495 | acpi_status status; | |
1da177e4 | 496 | |
b229cf92 | 497 | ACPI_FUNCTION_TRACE(hw_register_read); |
1da177e4 LT |
498 | |
499 | if (ACPI_MTX_LOCK == use_lock) { | |
4be44fcd LB |
500 | status = acpi_ut_acquire_mutex(ACPI_MTX_HARDWARE); |
501 | if (ACPI_FAILURE(status)) { | |
502 | return_ACPI_STATUS(status); | |
1da177e4 LT |
503 | } |
504 | } | |
505 | ||
506 | switch (register_id) { | |
4be44fcd | 507 | case ACPI_REGISTER_PM1_STATUS: /* 16-bit access */ |
1da177e4 | 508 | |
4be44fcd LB |
509 | status = |
510 | acpi_hw_low_level_read(16, &value1, | |
511 | &acpi_gbl_FADT->xpm1a_evt_blk); | |
512 | if (ACPI_FAILURE(status)) { | |
1da177e4 LT |
513 | goto unlock_and_exit; |
514 | } | |
515 | ||
516 | /* PM1B is optional */ | |
517 | ||
4be44fcd LB |
518 | status = |
519 | acpi_hw_low_level_read(16, &value2, | |
520 | &acpi_gbl_FADT->xpm1b_evt_blk); | |
1da177e4 LT |
521 | value1 |= value2; |
522 | break; | |
523 | ||
4be44fcd | 524 | case ACPI_REGISTER_PM1_ENABLE: /* 16-bit access */ |
1da177e4 | 525 | |
4be44fcd LB |
526 | status = |
527 | acpi_hw_low_level_read(16, &value1, &acpi_gbl_xpm1a_enable); | |
528 | if (ACPI_FAILURE(status)) { | |
1da177e4 LT |
529 | goto unlock_and_exit; |
530 | } | |
531 | ||
532 | /* PM1B is optional */ | |
533 | ||
4be44fcd LB |
534 | status = |
535 | acpi_hw_low_level_read(16, &value2, &acpi_gbl_xpm1b_enable); | |
1da177e4 LT |
536 | value1 |= value2; |
537 | break; | |
538 | ||
4be44fcd | 539 | case ACPI_REGISTER_PM1_CONTROL: /* 16-bit access */ |
1da177e4 | 540 | |
4be44fcd LB |
541 | status = |
542 | acpi_hw_low_level_read(16, &value1, | |
543 | &acpi_gbl_FADT->xpm1a_cnt_blk); | |
544 | if (ACPI_FAILURE(status)) { | |
1da177e4 LT |
545 | goto unlock_and_exit; |
546 | } | |
547 | ||
4be44fcd LB |
548 | status = |
549 | acpi_hw_low_level_read(16, &value2, | |
550 | &acpi_gbl_FADT->xpm1b_cnt_blk); | |
1da177e4 LT |
551 | value1 |= value2; |
552 | break; | |
553 | ||
4be44fcd | 554 | case ACPI_REGISTER_PM2_CONTROL: /* 8-bit access */ |
1da177e4 | 555 | |
4be44fcd LB |
556 | status = |
557 | acpi_hw_low_level_read(8, &value1, | |
558 | &acpi_gbl_FADT->xpm2_cnt_blk); | |
1da177e4 LT |
559 | break; |
560 | ||
4be44fcd | 561 | case ACPI_REGISTER_PM_TIMER: /* 32-bit access */ |
1da177e4 | 562 | |
4be44fcd LB |
563 | status = |
564 | acpi_hw_low_level_read(32, &value1, | |
565 | &acpi_gbl_FADT->xpm_tmr_blk); | |
1da177e4 LT |
566 | break; |
567 | ||
4be44fcd | 568 | case ACPI_REGISTER_SMI_COMMAND_BLOCK: /* 8-bit access */ |
1da177e4 | 569 | |
4be44fcd | 570 | status = acpi_os_read_port(acpi_gbl_FADT->smi_cmd, &value1, 8); |
1da177e4 LT |
571 | break; |
572 | ||
573 | default: | |
b8e4d893 | 574 | ACPI_ERROR((AE_INFO, "Unknown Register ID: %X", register_id)); |
1da177e4 LT |
575 | status = AE_BAD_PARAMETER; |
576 | break; | |
577 | } | |
578 | ||
4be44fcd | 579 | unlock_and_exit: |
1da177e4 | 580 | if (ACPI_MTX_LOCK == use_lock) { |
4be44fcd | 581 | (void)acpi_ut_release_mutex(ACPI_MTX_HARDWARE); |
1da177e4 LT |
582 | } |
583 | ||
4be44fcd | 584 | if (ACPI_SUCCESS(status)) { |
1da177e4 LT |
585 | *return_value = value1; |
586 | } | |
587 | ||
4be44fcd | 588 | return_ACPI_STATUS(status); |
1da177e4 LT |
589 | } |
590 | ||
1da177e4 LT |
591 | /****************************************************************************** |
592 | * | |
593 | * FUNCTION: acpi_hw_register_write | |
594 | * | |
595 | * PARAMETERS: use_lock - Mutex hw access | |
596 | * register_id - register_iD + Offset | |
597 | * Value - The value to write | |
598 | * | |
599 | * RETURN: Status | |
600 | * | |
601 | * DESCRIPTION: Acpi register Write function. Registers are written at the | |
602 | * given offset. | |
603 | * | |
604 | ******************************************************************************/ | |
605 | ||
4be44fcd | 606 | acpi_status acpi_hw_register_write(u8 use_lock, u32 register_id, u32 value) |
1da177e4 | 607 | { |
4be44fcd | 608 | acpi_status status; |
1da177e4 | 609 | |
b229cf92 | 610 | ACPI_FUNCTION_TRACE(hw_register_write); |
1da177e4 LT |
611 | |
612 | if (ACPI_MTX_LOCK == use_lock) { | |
4be44fcd LB |
613 | status = acpi_ut_acquire_mutex(ACPI_MTX_HARDWARE); |
614 | if (ACPI_FAILURE(status)) { | |
615 | return_ACPI_STATUS(status); | |
1da177e4 LT |
616 | } |
617 | } | |
618 | ||
619 | switch (register_id) { | |
4be44fcd | 620 | case ACPI_REGISTER_PM1_STATUS: /* 16-bit access */ |
1da177e4 | 621 | |
4be44fcd LB |
622 | status = |
623 | acpi_hw_low_level_write(16, value, | |
624 | &acpi_gbl_FADT->xpm1a_evt_blk); | |
625 | if (ACPI_FAILURE(status)) { | |
1da177e4 LT |
626 | goto unlock_and_exit; |
627 | } | |
628 | ||
629 | /* PM1B is optional */ | |
630 | ||
4be44fcd LB |
631 | status = |
632 | acpi_hw_low_level_write(16, value, | |
633 | &acpi_gbl_FADT->xpm1b_evt_blk); | |
1da177e4 LT |
634 | break; |
635 | ||
4be44fcd | 636 | case ACPI_REGISTER_PM1_ENABLE: /* 16-bit access */ |
1da177e4 | 637 | |
4be44fcd LB |
638 | status = |
639 | acpi_hw_low_level_write(16, value, &acpi_gbl_xpm1a_enable); | |
640 | if (ACPI_FAILURE(status)) { | |
1da177e4 LT |
641 | goto unlock_and_exit; |
642 | } | |
643 | ||
644 | /* PM1B is optional */ | |
645 | ||
4be44fcd LB |
646 | status = |
647 | acpi_hw_low_level_write(16, value, &acpi_gbl_xpm1b_enable); | |
1da177e4 LT |
648 | break; |
649 | ||
4be44fcd | 650 | case ACPI_REGISTER_PM1_CONTROL: /* 16-bit access */ |
1da177e4 | 651 | |
4be44fcd LB |
652 | status = |
653 | acpi_hw_low_level_write(16, value, | |
654 | &acpi_gbl_FADT->xpm1a_cnt_blk); | |
655 | if (ACPI_FAILURE(status)) { | |
1da177e4 LT |
656 | goto unlock_and_exit; |
657 | } | |
658 | ||
4be44fcd LB |
659 | status = |
660 | acpi_hw_low_level_write(16, value, | |
661 | &acpi_gbl_FADT->xpm1b_cnt_blk); | |
1da177e4 LT |
662 | break; |
663 | ||
4be44fcd | 664 | case ACPI_REGISTER_PM1A_CONTROL: /* 16-bit access */ |
1da177e4 | 665 | |
4be44fcd LB |
666 | status = |
667 | acpi_hw_low_level_write(16, value, | |
668 | &acpi_gbl_FADT->xpm1a_cnt_blk); | |
1da177e4 LT |
669 | break; |
670 | ||
4be44fcd | 671 | case ACPI_REGISTER_PM1B_CONTROL: /* 16-bit access */ |
1da177e4 | 672 | |
4be44fcd LB |
673 | status = |
674 | acpi_hw_low_level_write(16, value, | |
675 | &acpi_gbl_FADT->xpm1b_cnt_blk); | |
1da177e4 LT |
676 | break; |
677 | ||
4be44fcd | 678 | case ACPI_REGISTER_PM2_CONTROL: /* 8-bit access */ |
1da177e4 | 679 | |
4be44fcd LB |
680 | status = |
681 | acpi_hw_low_level_write(8, value, | |
682 | &acpi_gbl_FADT->xpm2_cnt_blk); | |
1da177e4 LT |
683 | break; |
684 | ||
4be44fcd | 685 | case ACPI_REGISTER_PM_TIMER: /* 32-bit access */ |
1da177e4 | 686 | |
4be44fcd LB |
687 | status = |
688 | acpi_hw_low_level_write(32, value, | |
689 | &acpi_gbl_FADT->xpm_tmr_blk); | |
1da177e4 LT |
690 | break; |
691 | ||
4be44fcd | 692 | case ACPI_REGISTER_SMI_COMMAND_BLOCK: /* 8-bit access */ |
1da177e4 LT |
693 | |
694 | /* SMI_CMD is currently always in IO space */ | |
695 | ||
4be44fcd | 696 | status = acpi_os_write_port(acpi_gbl_FADT->smi_cmd, value, 8); |
1da177e4 LT |
697 | break; |
698 | ||
1da177e4 LT |
699 | default: |
700 | status = AE_BAD_PARAMETER; | |
701 | break; | |
702 | } | |
703 | ||
4be44fcd | 704 | unlock_and_exit: |
1da177e4 | 705 | if (ACPI_MTX_LOCK == use_lock) { |
4be44fcd | 706 | (void)acpi_ut_release_mutex(ACPI_MTX_HARDWARE); |
1da177e4 LT |
707 | } |
708 | ||
4be44fcd | 709 | return_ACPI_STATUS(status); |
1da177e4 LT |
710 | } |
711 | ||
1da177e4 LT |
712 | /****************************************************************************** |
713 | * | |
714 | * FUNCTION: acpi_hw_low_level_read | |
715 | * | |
716 | * PARAMETERS: Width - 8, 16, or 32 | |
717 | * Value - Where the value is returned | |
718 | * Reg - GAS register structure | |
719 | * | |
720 | * RETURN: Status | |
721 | * | |
722 | * DESCRIPTION: Read from either memory or IO space. | |
723 | * | |
724 | ******************************************************************************/ | |
725 | ||
726 | acpi_status | |
4be44fcd | 727 | acpi_hw_low_level_read(u32 width, u32 * value, struct acpi_generic_address *reg) |
1da177e4 | 728 | { |
4be44fcd LB |
729 | u64 address; |
730 | acpi_status status; | |
1da177e4 | 731 | |
b229cf92 | 732 | ACPI_FUNCTION_NAME(hw_low_level_read); |
1da177e4 LT |
733 | |
734 | /* | |
735 | * Must have a valid pointer to a GAS structure, and | |
736 | * a non-zero address within. However, don't return an error | |
737 | * because the PM1A/B code must not fail if B isn't present. | |
738 | */ | |
739 | if (!reg) { | |
740 | return (AE_OK); | |
741 | } | |
742 | ||
743 | /* Get a local copy of the address. Handles possible alignment issues */ | |
744 | ||
4be44fcd | 745 | ACPI_MOVE_64_TO_64(&address, ®->address); |
1da177e4 LT |
746 | if (!address) { |
747 | return (AE_OK); | |
748 | } | |
749 | *value = 0; | |
750 | ||
751 | /* | |
752 | * Two address spaces supported: Memory or IO. | |
753 | * PCI_Config is not supported here because the GAS struct is insufficient | |
754 | */ | |
755 | switch (reg->address_space_id) { | |
756 | case ACPI_ADR_SPACE_SYSTEM_MEMORY: | |
757 | ||
4be44fcd LB |
758 | status = acpi_os_read_memory((acpi_physical_address) address, |
759 | value, width); | |
1da177e4 LT |
760 | break; |
761 | ||
1da177e4 LT |
762 | case ACPI_ADR_SPACE_SYSTEM_IO: |
763 | ||
4be44fcd LB |
764 | status = acpi_os_read_port((acpi_io_address) address, |
765 | value, width); | |
1da177e4 LT |
766 | break; |
767 | ||
1da177e4 | 768 | default: |
b8e4d893 BM |
769 | ACPI_ERROR((AE_INFO, |
770 | "Unsupported address space: %X", | |
771 | reg->address_space_id)); | |
1da177e4 LT |
772 | return (AE_BAD_PARAMETER); |
773 | } | |
774 | ||
4be44fcd LB |
775 | ACPI_DEBUG_PRINT((ACPI_DB_IO, |
776 | "Read: %8.8X width %2d from %8.8X%8.8X (%s)\n", | |
777 | *value, width, | |
778 | ACPI_FORMAT_UINT64(address), | |
779 | acpi_ut_get_region_name(reg->address_space_id))); | |
1da177e4 LT |
780 | |
781 | return (status); | |
782 | } | |
783 | ||
1da177e4 LT |
784 | /****************************************************************************** |
785 | * | |
786 | * FUNCTION: acpi_hw_low_level_write | |
787 | * | |
788 | * PARAMETERS: Width - 8, 16, or 32 | |
789 | * Value - To be written | |
790 | * Reg - GAS register structure | |
791 | * | |
792 | * RETURN: Status | |
793 | * | |
794 | * DESCRIPTION: Write to either memory or IO space. | |
795 | * | |
796 | ******************************************************************************/ | |
797 | ||
798 | acpi_status | |
4be44fcd | 799 | acpi_hw_low_level_write(u32 width, u32 value, struct acpi_generic_address * reg) |
1da177e4 | 800 | { |
4be44fcd LB |
801 | u64 address; |
802 | acpi_status status; | |
1da177e4 | 803 | |
b229cf92 | 804 | ACPI_FUNCTION_NAME(hw_low_level_write); |
1da177e4 LT |
805 | |
806 | /* | |
807 | * Must have a valid pointer to a GAS structure, and | |
808 | * a non-zero address within. However, don't return an error | |
809 | * because the PM1A/B code must not fail if B isn't present. | |
810 | */ | |
811 | if (!reg) { | |
812 | return (AE_OK); | |
813 | } | |
814 | ||
815 | /* Get a local copy of the address. Handles possible alignment issues */ | |
816 | ||
4be44fcd | 817 | ACPI_MOVE_64_TO_64(&address, ®->address); |
1da177e4 LT |
818 | if (!address) { |
819 | return (AE_OK); | |
820 | } | |
821 | ||
822 | /* | |
823 | * Two address spaces supported: Memory or IO. | |
824 | * PCI_Config is not supported here because the GAS struct is insufficient | |
825 | */ | |
826 | switch (reg->address_space_id) { | |
827 | case ACPI_ADR_SPACE_SYSTEM_MEMORY: | |
828 | ||
4be44fcd LB |
829 | status = acpi_os_write_memory((acpi_physical_address) address, |
830 | value, width); | |
1da177e4 LT |
831 | break; |
832 | ||
1da177e4 LT |
833 | case ACPI_ADR_SPACE_SYSTEM_IO: |
834 | ||
4be44fcd LB |
835 | status = acpi_os_write_port((acpi_io_address) address, |
836 | value, width); | |
1da177e4 LT |
837 | break; |
838 | ||
1da177e4 | 839 | default: |
b8e4d893 BM |
840 | ACPI_ERROR((AE_INFO, |
841 | "Unsupported address space: %X", | |
842 | reg->address_space_id)); | |
1da177e4 LT |
843 | return (AE_BAD_PARAMETER); |
844 | } | |
845 | ||
4be44fcd LB |
846 | ACPI_DEBUG_PRINT((ACPI_DB_IO, |
847 | "Wrote: %8.8X width %2d to %8.8X%8.8X (%s)\n", | |
848 | value, width, | |
849 | ACPI_FORMAT_UINT64(address), | |
850 | acpi_ut_get_region_name(reg->address_space_id))); | |
1da177e4 LT |
851 | |
852 | return (status); | |
853 | } |