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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 | /* | |
10 | * Copyright (C) 2000 - 2005, R. Byron Moore | |
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 | ||
46 | #include <linux/module.h> | |
47 | ||
48 | #include <acpi/acpi.h> | |
49 | #include <acpi/acnamesp.h> | |
50 | #include <acpi/acevents.h> | |
51 | ||
52 | #define _COMPONENT ACPI_HARDWARE | |
4be44fcd | 53 | ACPI_MODULE_NAME("hwregs") |
1da177e4 LT |
54 | |
55 | /******************************************************************************* | |
56 | * | |
57 | * FUNCTION: acpi_hw_clear_acpi_status | |
58 | * | |
59 | * PARAMETERS: Flags - Lock the hardware or not | |
60 | * | |
61 | * RETURN: none | |
62 | * | |
63 | * DESCRIPTION: Clears all fixed and general purpose status bits | |
64 | * THIS FUNCTION MUST BE CALLED WITH INTERRUPTS DISABLED | |
65 | * | |
66 | ******************************************************************************/ | |
4be44fcd | 67 | acpi_status acpi_hw_clear_acpi_status(u32 flags) |
1da177e4 | 68 | { |
4be44fcd | 69 | acpi_status status; |
1da177e4 | 70 | |
4be44fcd | 71 | ACPI_FUNCTION_TRACE("hw_clear_acpi_status"); |
1da177e4 | 72 | |
4be44fcd LB |
73 | ACPI_DEBUG_PRINT((ACPI_DB_IO, "About to write %04X to %04X\n", |
74 | ACPI_BITMASK_ALL_FIXED_STATUS, | |
75 | (u16) acpi_gbl_FADT->xpm1a_evt_blk.address)); | |
1da177e4 LT |
76 | |
77 | if (flags & ACPI_MTX_LOCK) { | |
4be44fcd LB |
78 | status = acpi_ut_acquire_mutex(ACPI_MTX_HARDWARE); |
79 | if (ACPI_FAILURE(status)) { | |
80 | return_ACPI_STATUS(status); | |
1da177e4 LT |
81 | } |
82 | } | |
83 | ||
4be44fcd LB |
84 | status = acpi_hw_register_write(ACPI_MTX_DO_NOT_LOCK, |
85 | ACPI_REGISTER_PM1_STATUS, | |
86 | ACPI_BITMASK_ALL_FIXED_STATUS); | |
87 | if (ACPI_FAILURE(status)) { | |
1da177e4 LT |
88 | goto unlock_and_exit; |
89 | } | |
90 | ||
91 | /* Clear the fixed events */ | |
92 | ||
93 | if (acpi_gbl_FADT->xpm1b_evt_blk.address) { | |
4be44fcd LB |
94 | status = |
95 | acpi_hw_low_level_write(16, ACPI_BITMASK_ALL_FIXED_STATUS, | |
96 | &acpi_gbl_FADT->xpm1b_evt_blk); | |
97 | if (ACPI_FAILURE(status)) { | |
1da177e4 LT |
98 | goto unlock_and_exit; |
99 | } | |
100 | } | |
101 | ||
102 | /* Clear the GPE Bits in all GPE registers in all GPE blocks */ | |
103 | ||
4be44fcd | 104 | status = acpi_ev_walk_gpe_list(acpi_hw_clear_gpe_block); |
1da177e4 | 105 | |
4be44fcd | 106 | unlock_and_exit: |
1da177e4 | 107 | if (flags & ACPI_MTX_LOCK) { |
4be44fcd | 108 | (void)acpi_ut_release_mutex(ACPI_MTX_HARDWARE); |
1da177e4 | 109 | } |
4be44fcd | 110 | return_ACPI_STATUS(status); |
1da177e4 LT |
111 | } |
112 | ||
1da177e4 LT |
113 | /******************************************************************************* |
114 | * | |
115 | * FUNCTION: acpi_get_sleep_type_data | |
116 | * | |
117 | * PARAMETERS: sleep_state - Numeric sleep state | |
118 | * *sleep_type_a - Where SLP_TYPa is returned | |
119 | * *sleep_type_b - Where SLP_TYPb is returned | |
120 | * | |
121 | * RETURN: Status - ACPI status | |
122 | * | |
123 | * DESCRIPTION: Obtain the SLP_TYPa and SLP_TYPb values for the requested sleep | |
124 | * state. | |
125 | * | |
126 | ******************************************************************************/ | |
127 | ||
128 | acpi_status | |
4be44fcd | 129 | acpi_get_sleep_type_data(u8 sleep_state, u8 * sleep_type_a, u8 * sleep_type_b) |
1da177e4 | 130 | { |
4be44fcd LB |
131 | acpi_status status = AE_OK; |
132 | struct acpi_parameter_info info; | |
133 | char *sleep_state_name; | |
1da177e4 | 134 | |
4be44fcd | 135 | ACPI_FUNCTION_TRACE("acpi_get_sleep_type_data"); |
1da177e4 | 136 | |
44f6c012 RM |
137 | /* Validate parameters */ |
138 | ||
4be44fcd LB |
139 | if ((sleep_state > ACPI_S_STATES_MAX) || !sleep_type_a || !sleep_type_b) { |
140 | return_ACPI_STATUS(AE_BAD_PARAMETER); | |
1da177e4 LT |
141 | } |
142 | ||
44f6c012 RM |
143 | /* Evaluate the namespace object containing the values for this state */ |
144 | ||
1da177e4 | 145 | info.parameters = NULL; |
44f6c012 | 146 | info.return_object = NULL; |
defba1d8 BM |
147 | sleep_state_name = |
148 | ACPI_CAST_PTR(char, acpi_gbl_sleep_state_names[sleep_state]); | |
44f6c012 | 149 | |
4be44fcd LB |
150 | status = acpi_ns_evaluate_by_name(sleep_state_name, &info); |
151 | if (ACPI_FAILURE(status)) { | |
152 | ACPI_DEBUG_PRINT((ACPI_DB_EXEC, | |
153 | "%s while evaluating sleep_state [%s]\n", | |
154 | acpi_format_exception(status), | |
155 | sleep_state_name)); | |
1da177e4 | 156 | |
4be44fcd | 157 | return_ACPI_STATUS(status); |
1da177e4 LT |
158 | } |
159 | ||
160 | /* Must have a return object */ | |
161 | ||
162 | if (!info.return_object) { | |
4be44fcd LB |
163 | ACPI_REPORT_ERROR(("No Sleep State object returned from [%s]\n", |
164 | sleep_state_name)); | |
1da177e4 LT |
165 | status = AE_NOT_EXIST; |
166 | } | |
167 | ||
168 | /* It must be of type Package */ | |
169 | ||
4be44fcd LB |
170 | else if (ACPI_GET_OBJECT_TYPE(info.return_object) != ACPI_TYPE_PACKAGE) { |
171 | ACPI_REPORT_ERROR(("Sleep State return object is not a Package\n")); | |
1da177e4 LT |
172 | status = AE_AML_OPERAND_TYPE; |
173 | } | |
174 | ||
44f6c012 RM |
175 | /* |
176 | * The package must have at least two elements. NOTE (March 2005): This | |
177 | * goes against the current ACPI spec which defines this object as a | |
178 | * package with one encoded DWORD element. However, existing practice | |
179 | * by BIOS vendors seems to be to have 2 or more elements, at least | |
180 | * one per sleep type (A/B). | |
181 | */ | |
1da177e4 | 182 | else if (info.return_object->package.count < 2) { |
4be44fcd | 183 | ACPI_REPORT_ERROR(("Sleep State return package does not have at least two elements\n")); |
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)) { | |
193 | ACPI_REPORT_ERROR(("Sleep State return package elements are not both Integers (%s, %s)\n", acpi_ut_get_object_type_name(info.return_object->package.elements[0]), acpi_ut_get_object_type_name(info.return_object->package.elements[1]))); | |
1da177e4 | 194 | status = AE_AML_OPERAND_TYPE; |
4be44fcd | 195 | } else { |
44f6c012 RM |
196 | /* Valid _Sx_ package size, type, and value */ |
197 | ||
198 | *sleep_type_a = (u8) | |
4be44fcd | 199 | (info.return_object->package.elements[0])->integer.value; |
44f6c012 | 200 | *sleep_type_b = (u8) |
4be44fcd | 201 | (info.return_object->package.elements[1])->integer.value; |
1da177e4 LT |
202 | } |
203 | ||
4be44fcd LB |
204 | if (ACPI_FAILURE(status)) { |
205 | ACPI_DEBUG_PRINT((ACPI_DB_ERROR, | |
206 | "%s While evaluating sleep_state [%s], bad Sleep object %p type %s\n", | |
207 | acpi_format_exception(status), | |
208 | sleep_state_name, info.return_object, | |
209 | acpi_ut_get_object_type_name(info. | |
210 | return_object))); | |
1da177e4 LT |
211 | } |
212 | ||
4be44fcd LB |
213 | acpi_ut_remove_reference(info.return_object); |
214 | return_ACPI_STATUS(status); | |
1da177e4 | 215 | } |
1da177e4 | 216 | |
4be44fcd | 217 | EXPORT_SYMBOL(acpi_get_sleep_type_data); |
1da177e4 LT |
218 | |
219 | /******************************************************************************* | |
220 | * | |
221 | * FUNCTION: acpi_hw_get_register_bit_mask | |
222 | * | |
223 | * PARAMETERS: register_id - Index of ACPI Register to access | |
224 | * | |
44f6c012 | 225 | * RETURN: The bitmask to be used when accessing the register |
1da177e4 | 226 | * |
44f6c012 | 227 | * DESCRIPTION: Map register_id into a register bitmask. |
1da177e4 LT |
228 | * |
229 | ******************************************************************************/ | |
230 | ||
4be44fcd | 231 | struct acpi_bit_register_info *acpi_hw_get_bit_register_info(u32 register_id) |
1da177e4 | 232 | { |
4be44fcd | 233 | ACPI_FUNCTION_NAME("hw_get_bit_register_info"); |
1da177e4 LT |
234 | |
235 | if (register_id > ACPI_BITREG_MAX) { | |
4be44fcd LB |
236 | ACPI_DEBUG_PRINT((ACPI_DB_ERROR, |
237 | "Invalid bit_register ID: %X\n", | |
238 | register_id)); | |
1da177e4 LT |
239 | return (NULL); |
240 | } | |
241 | ||
242 | return (&acpi_gbl_bit_register_info[register_id]); | |
243 | } | |
244 | ||
1da177e4 LT |
245 | /******************************************************************************* |
246 | * | |
247 | * FUNCTION: acpi_get_register | |
248 | * | |
249 | * PARAMETERS: register_id - ID of ACPI bit_register to access | |
250 | * return_value - Value that was read from the register | |
251 | * Flags - Lock the hardware or not | |
252 | * | |
253 | * RETURN: Status and the value read from specified Register. Value | |
254 | * returned is normalized to bit0 (is shifted all the way right) | |
255 | * | |
256 | * DESCRIPTION: ACPI bit_register read function. | |
257 | * | |
258 | ******************************************************************************/ | |
259 | ||
4be44fcd | 260 | acpi_status acpi_get_register(u32 register_id, u32 * return_value, u32 flags) |
1da177e4 | 261 | { |
4be44fcd LB |
262 | u32 register_value = 0; |
263 | struct acpi_bit_register_info *bit_reg_info; | |
264 | acpi_status status; | |
1da177e4 | 265 | |
4be44fcd | 266 | ACPI_FUNCTION_TRACE("acpi_get_register"); |
1da177e4 LT |
267 | |
268 | /* Get the info structure corresponding to the requested ACPI Register */ | |
269 | ||
4be44fcd | 270 | bit_reg_info = acpi_hw_get_bit_register_info(register_id); |
1da177e4 | 271 | if (!bit_reg_info) { |
4be44fcd | 272 | return_ACPI_STATUS(AE_BAD_PARAMETER); |
1da177e4 LT |
273 | } |
274 | ||
275 | if (flags & ACPI_MTX_LOCK) { | |
4be44fcd LB |
276 | status = acpi_ut_acquire_mutex(ACPI_MTX_HARDWARE); |
277 | if (ACPI_FAILURE(status)) { | |
278 | return_ACPI_STATUS(status); | |
1da177e4 LT |
279 | } |
280 | } | |
281 | ||
282 | /* Read from the register */ | |
283 | ||
4be44fcd LB |
284 | status = acpi_hw_register_read(ACPI_MTX_DO_NOT_LOCK, |
285 | bit_reg_info->parent_register, | |
286 | ®ister_value); | |
1da177e4 LT |
287 | |
288 | if (flags & ACPI_MTX_LOCK) { | |
4be44fcd | 289 | (void)acpi_ut_release_mutex(ACPI_MTX_HARDWARE); |
1da177e4 LT |
290 | } |
291 | ||
4be44fcd | 292 | if (ACPI_SUCCESS(status)) { |
1da177e4 LT |
293 | /* Normalize the value that was read */ |
294 | ||
4be44fcd LB |
295 | register_value = |
296 | ((register_value & bit_reg_info->access_bit_mask) | |
297 | >> bit_reg_info->bit_position); | |
1da177e4 LT |
298 | |
299 | *return_value = register_value; | |
300 | ||
4be44fcd LB |
301 | ACPI_DEBUG_PRINT((ACPI_DB_IO, "Read value %8.8X register %X\n", |
302 | register_value, | |
303 | bit_reg_info->parent_register)); | |
1da177e4 LT |
304 | } |
305 | ||
4be44fcd | 306 | return_ACPI_STATUS(status); |
1da177e4 | 307 | } |
1da177e4 | 308 | |
4be44fcd | 309 | EXPORT_SYMBOL(acpi_get_register); |
1da177e4 LT |
310 | |
311 | /******************************************************************************* | |
312 | * | |
313 | * FUNCTION: acpi_set_register | |
314 | * | |
315 | * PARAMETERS: register_id - ID of ACPI bit_register to access | |
316 | * Value - (only used on write) value to write to the | |
317 | * Register, NOT pre-normalized to the bit pos | |
318 | * Flags - Lock the hardware or not | |
319 | * | |
320 | * RETURN: Status | |
321 | * | |
322 | * DESCRIPTION: ACPI Bit Register write function. | |
323 | * | |
324 | ******************************************************************************/ | |
325 | ||
4be44fcd | 326 | acpi_status acpi_set_register(u32 register_id, u32 value, u32 flags) |
1da177e4 | 327 | { |
4be44fcd LB |
328 | u32 register_value = 0; |
329 | struct acpi_bit_register_info *bit_reg_info; | |
330 | acpi_status status; | |
1da177e4 | 331 | |
4be44fcd | 332 | ACPI_FUNCTION_TRACE_U32("acpi_set_register", register_id); |
1da177e4 LT |
333 | |
334 | /* Get the info structure corresponding to the requested ACPI Register */ | |
335 | ||
4be44fcd | 336 | bit_reg_info = acpi_hw_get_bit_register_info(register_id); |
1da177e4 | 337 | if (!bit_reg_info) { |
4be44fcd LB |
338 | ACPI_REPORT_ERROR(("Bad ACPI HW register_id: %X\n", |
339 | register_id)); | |
340 | return_ACPI_STATUS(AE_BAD_PARAMETER); | |
1da177e4 LT |
341 | } |
342 | ||
343 | if (flags & ACPI_MTX_LOCK) { | |
4be44fcd LB |
344 | status = acpi_ut_acquire_mutex(ACPI_MTX_HARDWARE); |
345 | if (ACPI_FAILURE(status)) { | |
346 | return_ACPI_STATUS(status); | |
1da177e4 LT |
347 | } |
348 | } | |
349 | ||
350 | /* Always do a register read first so we can insert the new bits */ | |
351 | ||
4be44fcd LB |
352 | status = acpi_hw_register_read(ACPI_MTX_DO_NOT_LOCK, |
353 | bit_reg_info->parent_register, | |
354 | ®ister_value); | |
355 | if (ACPI_FAILURE(status)) { | |
1da177e4 LT |
356 | goto unlock_and_exit; |
357 | } | |
358 | ||
359 | /* | |
360 | * Decode the Register ID | |
361 | * Register ID = [Register block ID] | [bit ID] | |
362 | * | |
363 | * Check bit ID to fine locate Register offset. | |
364 | * Check Mask to determine Register offset, and then read-write. | |
365 | */ | |
366 | switch (bit_reg_info->parent_register) { | |
367 | case ACPI_REGISTER_PM1_STATUS: | |
368 | ||
369 | /* | |
370 | * Status Registers are different from the rest. Clear by | |
371 | * writing 1, and writing 0 has no effect. So, the only relevant | |
372 | * information is the single bit we're interested in, all others should | |
373 | * be written as 0 so they will be left unchanged. | |
374 | */ | |
4be44fcd LB |
375 | value = ACPI_REGISTER_PREPARE_BITS(value, |
376 | bit_reg_info->bit_position, | |
377 | bit_reg_info-> | |
378 | access_bit_mask); | |
1da177e4 | 379 | if (value) { |
4be44fcd LB |
380 | status = acpi_hw_register_write(ACPI_MTX_DO_NOT_LOCK, |
381 | ACPI_REGISTER_PM1_STATUS, | |
382 | (u16) value); | |
1da177e4 LT |
383 | register_value = 0; |
384 | } | |
385 | break; | |
386 | ||
1da177e4 LT |
387 | case ACPI_REGISTER_PM1_ENABLE: |
388 | ||
4be44fcd LB |
389 | ACPI_REGISTER_INSERT_VALUE(register_value, |
390 | bit_reg_info->bit_position, | |
391 | bit_reg_info->access_bit_mask, | |
392 | value); | |
1da177e4 | 393 | |
4be44fcd LB |
394 | status = acpi_hw_register_write(ACPI_MTX_DO_NOT_LOCK, |
395 | ACPI_REGISTER_PM1_ENABLE, | |
396 | (u16) register_value); | |
1da177e4 LT |
397 | break; |
398 | ||
1da177e4 LT |
399 | case ACPI_REGISTER_PM1_CONTROL: |
400 | ||
401 | /* | |
402 | * Write the PM1 Control register. | |
403 | * Note that at this level, the fact that there are actually TWO | |
404 | * registers (A and B - and B may not exist) is abstracted. | |
405 | */ | |
4be44fcd LB |
406 | ACPI_DEBUG_PRINT((ACPI_DB_IO, "PM1 control: Read %X\n", |
407 | register_value)); | |
1da177e4 | 408 | |
4be44fcd LB |
409 | ACPI_REGISTER_INSERT_VALUE(register_value, |
410 | bit_reg_info->bit_position, | |
411 | bit_reg_info->access_bit_mask, | |
412 | value); | |
1da177e4 | 413 | |
4be44fcd LB |
414 | status = acpi_hw_register_write(ACPI_MTX_DO_NOT_LOCK, |
415 | ACPI_REGISTER_PM1_CONTROL, | |
416 | (u16) register_value); | |
1da177e4 LT |
417 | break; |
418 | ||
1da177e4 LT |
419 | case ACPI_REGISTER_PM2_CONTROL: |
420 | ||
4be44fcd LB |
421 | status = acpi_hw_register_read(ACPI_MTX_DO_NOT_LOCK, |
422 | ACPI_REGISTER_PM2_CONTROL, | |
423 | ®ister_value); | |
424 | if (ACPI_FAILURE(status)) { | |
1da177e4 LT |
425 | goto unlock_and_exit; |
426 | } | |
427 | ||
4be44fcd LB |
428 | ACPI_DEBUG_PRINT((ACPI_DB_IO, |
429 | "PM2 control: Read %X from %8.8X%8.8X\n", | |
430 | register_value, | |
431 | ACPI_FORMAT_UINT64(acpi_gbl_FADT-> | |
432 | xpm2_cnt_blk.address))); | |
433 | ||
434 | ACPI_REGISTER_INSERT_VALUE(register_value, | |
435 | bit_reg_info->bit_position, | |
436 | bit_reg_info->access_bit_mask, | |
437 | value); | |
438 | ||
439 | ACPI_DEBUG_PRINT((ACPI_DB_IO, | |
440 | "About to write %4.4X to %8.8X%8.8X\n", | |
441 | register_value, | |
442 | ACPI_FORMAT_UINT64(acpi_gbl_FADT-> | |
443 | xpm2_cnt_blk.address))); | |
444 | ||
445 | status = acpi_hw_register_write(ACPI_MTX_DO_NOT_LOCK, | |
446 | ACPI_REGISTER_PM2_CONTROL, | |
447 | (u8) (register_value)); | |
1da177e4 LT |
448 | break; |
449 | ||
1da177e4 LT |
450 | default: |
451 | break; | |
452 | } | |
453 | ||
4be44fcd | 454 | unlock_and_exit: |
1da177e4 LT |
455 | |
456 | if (flags & ACPI_MTX_LOCK) { | |
4be44fcd | 457 | (void)acpi_ut_release_mutex(ACPI_MTX_HARDWARE); |
1da177e4 LT |
458 | } |
459 | ||
460 | /* Normalize the value that was read */ | |
461 | ||
4be44fcd LB |
462 | ACPI_DEBUG_EXEC(register_value = |
463 | ((register_value & bit_reg_info->access_bit_mask) >> | |
464 | bit_reg_info->bit_position)); | |
1da177e4 | 465 | |
4be44fcd LB |
466 | ACPI_DEBUG_PRINT((ACPI_DB_IO, |
467 | "Set bits: %8.8X actual %8.8X register %X\n", value, | |
468 | register_value, bit_reg_info->parent_register)); | |
469 | return_ACPI_STATUS(status); | |
1da177e4 | 470 | } |
1da177e4 | 471 | |
4be44fcd | 472 | EXPORT_SYMBOL(acpi_set_register); |
1da177e4 LT |
473 | |
474 | /****************************************************************************** | |
475 | * | |
476 | * FUNCTION: acpi_hw_register_read | |
477 | * | |
478 | * PARAMETERS: use_lock - Mutex hw access | |
479 | * register_id - register_iD + Offset | |
44f6c012 | 480 | * return_value - Where the register value is returned |
1da177e4 LT |
481 | * |
482 | * RETURN: Status and the value read. | |
483 | * | |
484 | * DESCRIPTION: Acpi register read function. Registers are read at the | |
485 | * given offset. | |
486 | * | |
487 | ******************************************************************************/ | |
488 | ||
489 | acpi_status | |
4be44fcd | 490 | acpi_hw_register_read(u8 use_lock, u32 register_id, u32 * return_value) |
1da177e4 | 491 | { |
4be44fcd LB |
492 | u32 value1 = 0; |
493 | u32 value2 = 0; | |
494 | acpi_status status; | |
1da177e4 | 495 | |
4be44fcd | 496 | ACPI_FUNCTION_TRACE("hw_register_read"); |
1da177e4 LT |
497 | |
498 | if (ACPI_MTX_LOCK == use_lock) { | |
4be44fcd LB |
499 | status = acpi_ut_acquire_mutex(ACPI_MTX_HARDWARE); |
500 | if (ACPI_FAILURE(status)) { | |
501 | return_ACPI_STATUS(status); | |
1da177e4 LT |
502 | } |
503 | } | |
504 | ||
505 | switch (register_id) { | |
4be44fcd | 506 | case ACPI_REGISTER_PM1_STATUS: /* 16-bit access */ |
1da177e4 | 507 | |
4be44fcd LB |
508 | status = |
509 | acpi_hw_low_level_read(16, &value1, | |
510 | &acpi_gbl_FADT->xpm1a_evt_blk); | |
511 | if (ACPI_FAILURE(status)) { | |
1da177e4 LT |
512 | goto unlock_and_exit; |
513 | } | |
514 | ||
515 | /* PM1B is optional */ | |
516 | ||
4be44fcd LB |
517 | status = |
518 | acpi_hw_low_level_read(16, &value2, | |
519 | &acpi_gbl_FADT->xpm1b_evt_blk); | |
1da177e4 LT |
520 | value1 |= value2; |
521 | break; | |
522 | ||
4be44fcd | 523 | case ACPI_REGISTER_PM1_ENABLE: /* 16-bit access */ |
1da177e4 | 524 | |
4be44fcd LB |
525 | status = |
526 | acpi_hw_low_level_read(16, &value1, &acpi_gbl_xpm1a_enable); | |
527 | if (ACPI_FAILURE(status)) { | |
1da177e4 LT |
528 | goto unlock_and_exit; |
529 | } | |
530 | ||
531 | /* PM1B is optional */ | |
532 | ||
4be44fcd LB |
533 | status = |
534 | acpi_hw_low_level_read(16, &value2, &acpi_gbl_xpm1b_enable); | |
1da177e4 LT |
535 | value1 |= value2; |
536 | break; | |
537 | ||
4be44fcd | 538 | case ACPI_REGISTER_PM1_CONTROL: /* 16-bit access */ |
1da177e4 | 539 | |
4be44fcd LB |
540 | status = |
541 | acpi_hw_low_level_read(16, &value1, | |
542 | &acpi_gbl_FADT->xpm1a_cnt_blk); | |
543 | if (ACPI_FAILURE(status)) { | |
1da177e4 LT |
544 | goto unlock_and_exit; |
545 | } | |
546 | ||
4be44fcd LB |
547 | status = |
548 | acpi_hw_low_level_read(16, &value2, | |
549 | &acpi_gbl_FADT->xpm1b_cnt_blk); | |
1da177e4 LT |
550 | value1 |= value2; |
551 | break; | |
552 | ||
4be44fcd | 553 | case ACPI_REGISTER_PM2_CONTROL: /* 8-bit access */ |
1da177e4 | 554 | |
4be44fcd LB |
555 | status = |
556 | acpi_hw_low_level_read(8, &value1, | |
557 | &acpi_gbl_FADT->xpm2_cnt_blk); | |
1da177e4 LT |
558 | break; |
559 | ||
4be44fcd | 560 | case ACPI_REGISTER_PM_TIMER: /* 32-bit access */ |
1da177e4 | 561 | |
4be44fcd LB |
562 | status = |
563 | acpi_hw_low_level_read(32, &value1, | |
564 | &acpi_gbl_FADT->xpm_tmr_blk); | |
1da177e4 LT |
565 | break; |
566 | ||
4be44fcd | 567 | case ACPI_REGISTER_SMI_COMMAND_BLOCK: /* 8-bit access */ |
1da177e4 | 568 | |
4be44fcd | 569 | status = acpi_os_read_port(acpi_gbl_FADT->smi_cmd, &value1, 8); |
1da177e4 LT |
570 | break; |
571 | ||
572 | default: | |
4be44fcd LB |
573 | ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Unknown Register ID: %X\n", |
574 | 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 | |
4be44fcd | 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 | |
4be44fcd | 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: |
4be44fcd LB |
769 | ACPI_DEBUG_PRINT((ACPI_DB_ERROR, |
770 | "Unsupported address space: %X\n", | |
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 | |
4be44fcd | 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: |
4be44fcd LB |
840 | ACPI_DEBUG_PRINT((ACPI_DB_ERROR, |
841 | "Unsupported address space: %X\n", | |
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 | } |