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7db5d82d BM |
1 | |
2 | /****************************************************************************** | |
3 | * | |
4 | * Module Name: hwxface - Public ACPICA hardware interfaces | |
5 | * | |
6 | *****************************************************************************/ | |
7 | ||
8 | /* | |
a8357b0c | 9 | * Copyright (C) 2000 - 2010, Intel Corp. |
7db5d82d BM |
10 | * All rights reserved. |
11 | * | |
12 | * Redistribution and use in source and binary forms, with or without | |
13 | * modification, are permitted provided that the following conditions | |
14 | * are met: | |
15 | * 1. Redistributions of source code must retain the above copyright | |
16 | * notice, this list of conditions, and the following disclaimer, | |
17 | * without modification. | |
18 | * 2. Redistributions in binary form must reproduce at minimum a disclaimer | |
19 | * substantially similar to the "NO WARRANTY" disclaimer below | |
20 | * ("Disclaimer") and any redistribution must be conditioned upon | |
21 | * including a substantially similar Disclaimer requirement for further | |
22 | * binary redistribution. | |
23 | * 3. Neither the names of the above-listed copyright holders nor the names | |
24 | * of any contributors may be used to endorse or promote products derived | |
25 | * from this software without specific prior written permission. | |
26 | * | |
27 | * Alternatively, this software may be distributed under the terms of the | |
28 | * GNU General Public License ("GPL") version 2 as published by the Free | |
29 | * Software Foundation. | |
30 | * | |
31 | * NO WARRANTY | |
32 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | |
33 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | |
34 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR | |
35 | * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT | |
36 | * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
37 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
38 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
39 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, | |
40 | * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING | |
41 | * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE | |
42 | * POSSIBILITY OF SUCH DAMAGES. | |
43 | */ | |
44 | ||
45 | #include <acpi/acpi.h> | |
e2f7a777 LB |
46 | #include "accommon.h" |
47 | #include "acnamesp.h" | |
7db5d82d BM |
48 | |
49 | #define _COMPONENT ACPI_HARDWARE | |
50 | ACPI_MODULE_NAME("hwxface") | |
51 | ||
d3fd902d BM |
52 | /****************************************************************************** |
53 | * | |
54 | * FUNCTION: acpi_reset | |
55 | * | |
56 | * PARAMETERS: None | |
57 | * | |
58 | * RETURN: Status | |
59 | * | |
60 | * DESCRIPTION: Set reset register in memory or IO space. Note: Does not | |
61 | * support reset register in PCI config space, this must be | |
62 | * handled separately. | |
63 | * | |
64 | ******************************************************************************/ | |
65 | acpi_status acpi_reset(void) | |
66 | { | |
67 | struct acpi_generic_address *reset_reg; | |
68 | acpi_status status; | |
69 | ||
70 | ACPI_FUNCTION_TRACE(acpi_reset); | |
71 | ||
72 | reset_reg = &acpi_gbl_FADT.reset_register; | |
73 | ||
74 | /* Check if the reset register is supported */ | |
75 | ||
76 | if (!(acpi_gbl_FADT.flags & ACPI_FADT_RESET_REGISTER) || | |
77 | !reset_reg->address) { | |
78 | return_ACPI_STATUS(AE_NOT_EXIST); | |
79 | } | |
80 | ||
8a964236 BM |
81 | if (reset_reg->space_id == ACPI_ADR_SPACE_SYSTEM_IO) { |
82 | /* | |
83 | * For I/O space, write directly to the OSL. This bypasses the port | |
84 | * validation mechanism, which may block a valid write to the reset | |
85 | * register. | |
86 | */ | |
87 | status = | |
88 | acpi_os_write_port((acpi_io_address) reset_reg->address, | |
89 | acpi_gbl_FADT.reset_value, | |
90 | reset_reg->bit_width); | |
91 | } else { | |
92 | /* Write the reset value to the reset register */ | |
93 | ||
94 | status = acpi_hw_write(acpi_gbl_FADT.reset_value, reset_reg); | |
95 | } | |
d3fd902d | 96 | |
d3fd902d BM |
97 | return_ACPI_STATUS(status); |
98 | } | |
99 | ||
100 | ACPI_EXPORT_SYMBOL(acpi_reset) | |
101 | ||
7db5d82d BM |
102 | /****************************************************************************** |
103 | * | |
104 | * FUNCTION: acpi_read | |
105 | * | |
106 | * PARAMETERS: Value - Where the value is returned | |
107 | * Reg - GAS register structure | |
108 | * | |
109 | * RETURN: Status | |
110 | * | |
111 | * DESCRIPTION: Read from either memory or IO space. | |
112 | * | |
c6b5774c BM |
113 | * LIMITATIONS: <These limitations also apply to acpi_write> |
114 | * bit_width must be exactly 8, 16, 32, or 64. | |
115 | * space_iD must be system_memory or system_iO. | |
116 | * bit_offset and access_width are currently ignored, as there has | |
117 | * not been a need to implement these. | |
118 | * | |
7db5d82d | 119 | ******************************************************************************/ |
c6b5774c | 120 | acpi_status acpi_read(u64 *return_value, struct acpi_generic_address *reg) |
7db5d82d | 121 | { |
c6b5774c | 122 | u32 value; |
7db5d82d BM |
123 | u32 width; |
124 | u64 address; | |
125 | acpi_status status; | |
126 | ||
127 | ACPI_FUNCTION_NAME(acpi_read); | |
128 | ||
c6b5774c | 129 | if (!return_value) { |
ac0c8450 | 130 | return (AE_BAD_PARAMETER); |
7db5d82d BM |
131 | } |
132 | ||
c6b5774c | 133 | /* Validate contents of the GAS register. Allow 64-bit transfers */ |
7db5d82d | 134 | |
c6b5774c BM |
135 | status = acpi_hw_validate_register(reg, 64, &address); |
136 | if (ACPI_FAILURE(status)) { | |
137 | return (status); | |
7db5d82d BM |
138 | } |
139 | ||
7db5d82d | 140 | width = reg->bit_width; |
c6b5774c BM |
141 | if (width == 64) { |
142 | width = 32; /* Break into two 32-bit transfers */ | |
7db5d82d BM |
143 | } |
144 | ||
c6b5774c | 145 | /* Initialize entire 64-bit return value to zero */ |
7db5d82d | 146 | |
c6b5774c BM |
147 | *return_value = 0; |
148 | value = 0; | |
7db5d82d BM |
149 | |
150 | /* | |
88dcb04a BM |
151 | * Two address spaces supported: Memory or IO. PCI_Config is |
152 | * not supported here because the GAS structure is insufficient | |
7db5d82d | 153 | */ |
c6b5774c BM |
154 | if (reg->space_id == ACPI_ADR_SPACE_SYSTEM_MEMORY) { |
155 | status = acpi_os_read_memory((acpi_physical_address) | |
156 | address, &value, width); | |
157 | if (ACPI_FAILURE(status)) { | |
158 | return (status); | |
159 | } | |
160 | *return_value = value; | |
161 | ||
162 | if (reg->bit_width == 64) { | |
163 | ||
164 | /* Read the top 32 bits */ | |
165 | ||
166 | status = acpi_os_read_memory((acpi_physical_address) | |
167 | (address + 4), &value, 32); | |
168 | if (ACPI_FAILURE(status)) { | |
169 | return (status); | |
170 | } | |
171 | *return_value |= ((u64)value << 32); | |
172 | } | |
173 | } else { /* ACPI_ADR_SPACE_SYSTEM_IO, validated earlier */ | |
174 | ||
175 | status = acpi_hw_read_port((acpi_io_address) | |
176 | address, &value, width); | |
177 | if (ACPI_FAILURE(status)) { | |
178 | return (status); | |
179 | } | |
180 | *return_value = value; | |
181 | ||
182 | if (reg->bit_width == 64) { | |
183 | ||
184 | /* Read the top 32 bits */ | |
185 | ||
186 | status = acpi_hw_read_port((acpi_io_address) | |
187 | (address + 4), &value, 32); | |
188 | if (ACPI_FAILURE(status)) { | |
189 | return (status); | |
190 | } | |
191 | *return_value |= ((u64)value << 32); | |
192 | } | |
7db5d82d BM |
193 | } |
194 | ||
195 | ACPI_DEBUG_PRINT((ACPI_DB_IO, | |
c6b5774c BM |
196 | "Read: %8.8X%8.8X width %2d from %8.8X%8.8X (%s)\n", |
197 | ACPI_FORMAT_UINT64(*return_value), reg->bit_width, | |
198 | ACPI_FORMAT_UINT64(address), | |
7db5d82d BM |
199 | acpi_ut_get_region_name(reg->space_id))); |
200 | ||
201 | return (status); | |
202 | } | |
203 | ||
204 | ACPI_EXPORT_SYMBOL(acpi_read) | |
205 | ||
206 | /****************************************************************************** | |
207 | * | |
208 | * FUNCTION: acpi_write | |
209 | * | |
c6b5774c | 210 | * PARAMETERS: Value - Value to be written |
7db5d82d BM |
211 | * Reg - GAS register structure |
212 | * | |
213 | * RETURN: Status | |
214 | * | |
215 | * DESCRIPTION: Write to either memory or IO space. | |
216 | * | |
217 | ******************************************************************************/ | |
c6b5774c | 218 | acpi_status acpi_write(u64 value, struct acpi_generic_address *reg) |
7db5d82d BM |
219 | { |
220 | u32 width; | |
221 | u64 address; | |
222 | acpi_status status; | |
223 | ||
224 | ACPI_FUNCTION_NAME(acpi_write); | |
225 | ||
c6b5774c | 226 | /* Validate contents of the GAS register. Allow 64-bit transfers */ |
7db5d82d | 227 | |
c6b5774c BM |
228 | status = acpi_hw_validate_register(reg, 64, &address); |
229 | if (ACPI_FAILURE(status)) { | |
230 | return (status); | |
7db5d82d BM |
231 | } |
232 | ||
7db5d82d | 233 | width = reg->bit_width; |
c6b5774c BM |
234 | if (width == 64) { |
235 | width = 32; /* Break into two 32-bit transfers */ | |
7db5d82d BM |
236 | } |
237 | ||
238 | /* | |
c6b5774c BM |
239 | * Two address spaces supported: Memory or IO. PCI_Config is |
240 | * not supported here because the GAS structure is insufficient | |
7db5d82d | 241 | */ |
c6b5774c BM |
242 | if (reg->space_id == ACPI_ADR_SPACE_SYSTEM_MEMORY) { |
243 | status = acpi_os_write_memory((acpi_physical_address) | |
244 | address, ACPI_LODWORD(value), | |
245 | width); | |
246 | if (ACPI_FAILURE(status)) { | |
247 | return (status); | |
248 | } | |
249 | ||
250 | if (reg->bit_width == 64) { | |
251 | status = acpi_os_write_memory((acpi_physical_address) | |
252 | (address + 4), | |
253 | ACPI_HIDWORD(value), 32); | |
254 | if (ACPI_FAILURE(status)) { | |
255 | return (status); | |
256 | } | |
257 | } | |
258 | } else { /* ACPI_ADR_SPACE_SYSTEM_IO, validated earlier */ | |
259 | ||
260 | status = acpi_hw_write_port((acpi_io_address) | |
261 | address, ACPI_LODWORD(value), | |
7db5d82d | 262 | width); |
c6b5774c BM |
263 | if (ACPI_FAILURE(status)) { |
264 | return (status); | |
265 | } | |
266 | ||
267 | if (reg->bit_width == 64) { | |
268 | status = acpi_hw_write_port((acpi_io_address) | |
269 | (address + 4), | |
270 | ACPI_HIDWORD(value), 32); | |
271 | if (ACPI_FAILURE(status)) { | |
272 | return (status); | |
273 | } | |
274 | } | |
7db5d82d BM |
275 | } |
276 | ||
277 | ACPI_DEBUG_PRINT((ACPI_DB_IO, | |
c6b5774c BM |
278 | "Wrote: %8.8X%8.8X width %2d to %8.8X%8.8X (%s)\n", |
279 | ACPI_FORMAT_UINT64(value), reg->bit_width, | |
280 | ACPI_FORMAT_UINT64(address), | |
7db5d82d BM |
281 | acpi_ut_get_region_name(reg->space_id))); |
282 | ||
283 | return (status); | |
284 | } | |
285 | ||
286 | ACPI_EXPORT_SYMBOL(acpi_write) | |
287 | ||
288 | /******************************************************************************* | |
289 | * | |
50ffba1b | 290 | * FUNCTION: acpi_read_bit_register |
7db5d82d | 291 | * |
9892dd23 BM |
292 | * PARAMETERS: register_id - ID of ACPI Bit Register to access |
293 | * return_value - Value that was read from the register, | |
294 | * normalized to bit position zero. | |
7db5d82d | 295 | * |
9892dd23 | 296 | * RETURN: Status and the value read from the specified Register. Value |
7db5d82d BM |
297 | * returned is normalized to bit0 (is shifted all the way right) |
298 | * | |
299 | * DESCRIPTION: ACPI bit_register read function. Does not acquire the HW lock. | |
300 | * | |
9892dd23 BM |
301 | * SUPPORTS: Bit fields in PM1 Status, PM1 Enable, PM1 Control, and |
302 | * PM2 Control. | |
303 | * | |
304 | * Note: The hardware lock is not required when reading the ACPI bit registers | |
305 | * since almost all of them are single bit and it does not matter that | |
306 | * the parent hardware register can be split across two physical | |
307 | * registers. The only multi-bit field is SLP_TYP in the PM1 control | |
308 | * register, but this field does not cross an 8-bit boundary (nor does | |
309 | * it make much sense to actually read this field.) | |
310 | * | |
7db5d82d | 311 | ******************************************************************************/ |
50ffba1b | 312 | acpi_status acpi_read_bit_register(u32 register_id, u32 *return_value) |
7db5d82d | 313 | { |
7db5d82d | 314 | struct acpi_bit_register_info *bit_reg_info; |
88dcb04a BM |
315 | u32 register_value; |
316 | u32 value; | |
7db5d82d BM |
317 | acpi_status status; |
318 | ||
88dcb04a | 319 | ACPI_FUNCTION_TRACE_U32(acpi_read_bit_register, register_id); |
7db5d82d BM |
320 | |
321 | /* Get the info structure corresponding to the requested ACPI Register */ | |
322 | ||
323 | bit_reg_info = acpi_hw_get_bit_register_info(register_id); | |
324 | if (!bit_reg_info) { | |
325 | return_ACPI_STATUS(AE_BAD_PARAMETER); | |
326 | } | |
327 | ||
9892dd23 | 328 | /* Read the entire parent register */ |
7db5d82d BM |
329 | |
330 | status = acpi_hw_register_read(bit_reg_info->parent_register, | |
331 | ®ister_value); | |
88dcb04a BM |
332 | if (ACPI_FAILURE(status)) { |
333 | return_ACPI_STATUS(status); | |
334 | } | |
7db5d82d | 335 | |
88dcb04a | 336 | /* Normalize the value that was read, mask off other bits */ |
7db5d82d | 337 | |
88dcb04a BM |
338 | value = ((register_value & bit_reg_info->access_bit_mask) |
339 | >> bit_reg_info->bit_position); | |
7db5d82d | 340 | |
88dcb04a BM |
341 | ACPI_DEBUG_PRINT((ACPI_DB_IO, |
342 | "BitReg %X, ParentReg %X, Actual %8.8X, ReturnValue %8.8X\n", | |
343 | register_id, bit_reg_info->parent_register, | |
344 | register_value, value)); | |
7db5d82d | 345 | |
88dcb04a BM |
346 | *return_value = value; |
347 | return_ACPI_STATUS(AE_OK); | |
7db5d82d BM |
348 | } |
349 | ||
50ffba1b | 350 | ACPI_EXPORT_SYMBOL(acpi_read_bit_register) |
7db5d82d BM |
351 | |
352 | /******************************************************************************* | |
353 | * | |
50ffba1b | 354 | * FUNCTION: acpi_write_bit_register |
7db5d82d | 355 | * |
9892dd23 BM |
356 | * PARAMETERS: register_id - ID of ACPI Bit Register to access |
357 | * Value - Value to write to the register, in bit | |
358 | * position zero. The bit is automaticallly | |
359 | * shifted to the correct position. | |
7db5d82d BM |
360 | * |
361 | * RETURN: Status | |
362 | * | |
9892dd23 BM |
363 | * DESCRIPTION: ACPI Bit Register write function. Acquires the hardware lock |
364 | * since most operations require a read/modify/write sequence. | |
365 | * | |
366 | * SUPPORTS: Bit fields in PM1 Status, PM1 Enable, PM1 Control, and | |
367 | * PM2 Control. | |
7db5d82d | 368 | * |
88dcb04a BM |
369 | * Note that at this level, the fact that there may be actually two |
370 | * hardware registers (A and B - and B may not exist) is abstracted. | |
371 | * | |
7db5d82d | 372 | ******************************************************************************/ |
50ffba1b | 373 | acpi_status acpi_write_bit_register(u32 register_id, u32 value) |
7db5d82d | 374 | { |
7db5d82d | 375 | struct acpi_bit_register_info *bit_reg_info; |
7db5d82d | 376 | acpi_cpu_flags lock_flags; |
88dcb04a BM |
377 | u32 register_value; |
378 | acpi_status status = AE_OK; | |
7db5d82d | 379 | |
50ffba1b | 380 | ACPI_FUNCTION_TRACE_U32(acpi_write_bit_register, register_id); |
7db5d82d BM |
381 | |
382 | /* Get the info structure corresponding to the requested ACPI Register */ | |
383 | ||
384 | bit_reg_info = acpi_hw_get_bit_register_info(register_id); | |
385 | if (!bit_reg_info) { | |
7db5d82d BM |
386 | return_ACPI_STATUS(AE_BAD_PARAMETER); |
387 | } | |
388 | ||
389 | lock_flags = acpi_os_acquire_lock(acpi_gbl_hardware_lock); | |
390 | ||
7db5d82d | 391 | /* |
88dcb04a BM |
392 | * At this point, we know that the parent register is one of the |
393 | * following: PM1 Status, PM1 Enable, PM1 Control, or PM2 Control | |
7db5d82d | 394 | */ |
88dcb04a | 395 | if (bit_reg_info->parent_register != ACPI_REGISTER_PM1_STATUS) { |
7db5d82d | 396 | /* |
88dcb04a BM |
397 | * 1) Case for PM1 Enable, PM1 Control, and PM2 Control |
398 | * | |
399 | * Perform a register read to preserve the bits that we are not | |
400 | * interested in | |
7db5d82d | 401 | */ |
88dcb04a | 402 | status = acpi_hw_register_read(bit_reg_info->parent_register, |
7db5d82d BM |
403 | ®ister_value); |
404 | if (ACPI_FAILURE(status)) { | |
405 | goto unlock_and_exit; | |
406 | } | |
407 | ||
88dcb04a BM |
408 | /* |
409 | * Insert the input bit into the value that was just read | |
410 | * and write the register | |
411 | */ | |
7db5d82d BM |
412 | ACPI_REGISTER_INSERT_VALUE(register_value, |
413 | bit_reg_info->bit_position, | |
414 | bit_reg_info->access_bit_mask, | |
415 | value); | |
416 | ||
88dcb04a BM |
417 | status = acpi_hw_register_write(bit_reg_info->parent_register, |
418 | register_value); | |
419 | } else { | |
420 | /* | |
421 | * 2) Case for PM1 Status | |
422 | * | |
423 | * The Status register is different from the rest. Clear an event | |
424 | * by writing 1, writing 0 has no effect. So, the only relevant | |
425 | * information is the single bit we're interested in, all others | |
426 | * should be written as 0 so they will be left unchanged. | |
427 | */ | |
428 | register_value = ACPI_REGISTER_PREPARE_BITS(value, | |
429 | bit_reg_info-> | |
430 | bit_position, | |
431 | bit_reg_info-> | |
432 | access_bit_mask); | |
7db5d82d | 433 | |
88dcb04a | 434 | /* No need to write the register if value is all zeros */ |
7db5d82d | 435 | |
88dcb04a BM |
436 | if (register_value) { |
437 | status = | |
438 | acpi_hw_register_write(ACPI_REGISTER_PM1_STATUS, | |
439 | register_value); | |
440 | } | |
7db5d82d BM |
441 | } |
442 | ||
88dcb04a BM |
443 | ACPI_DEBUG_PRINT((ACPI_DB_IO, |
444 | "BitReg %X, ParentReg %X, Value %8.8X, Actual %8.8X\n", | |
445 | register_id, bit_reg_info->parent_register, value, | |
446 | register_value)); | |
7db5d82d | 447 | |
88dcb04a | 448 | unlock_and_exit: |
7db5d82d | 449 | |
88dcb04a | 450 | acpi_os_release_lock(acpi_gbl_hardware_lock, lock_flags); |
7db5d82d BM |
451 | return_ACPI_STATUS(status); |
452 | } | |
453 | ||
50ffba1b | 454 | ACPI_EXPORT_SYMBOL(acpi_write_bit_register) |
7db5d82d BM |
455 | |
456 | /******************************************************************************* | |
457 | * | |
458 | * FUNCTION: acpi_get_sleep_type_data | |
459 | * | |
460 | * PARAMETERS: sleep_state - Numeric sleep state | |
461 | * *sleep_type_a - Where SLP_TYPa is returned | |
462 | * *sleep_type_b - Where SLP_TYPb is returned | |
463 | * | |
464 | * RETURN: Status - ACPI status | |
465 | * | |
466 | * DESCRIPTION: Obtain the SLP_TYPa and SLP_TYPb values for the requested sleep | |
467 | * state. | |
468 | * | |
469 | ******************************************************************************/ | |
470 | acpi_status | |
471 | acpi_get_sleep_type_data(u8 sleep_state, u8 *sleep_type_a, u8 *sleep_type_b) | |
472 | { | |
473 | acpi_status status = AE_OK; | |
474 | struct acpi_evaluate_info *info; | |
475 | ||
476 | ACPI_FUNCTION_TRACE(acpi_get_sleep_type_data); | |
477 | ||
478 | /* Validate parameters */ | |
479 | ||
480 | if ((sleep_state > ACPI_S_STATES_MAX) || !sleep_type_a || !sleep_type_b) { | |
481 | return_ACPI_STATUS(AE_BAD_PARAMETER); | |
482 | } | |
483 | ||
484 | /* Allocate the evaluation information block */ | |
485 | ||
486 | info = ACPI_ALLOCATE_ZEROED(sizeof(struct acpi_evaluate_info)); | |
487 | if (!info) { | |
488 | return_ACPI_STATUS(AE_NO_MEMORY); | |
489 | } | |
490 | ||
491 | info->pathname = | |
492 | ACPI_CAST_PTR(char, acpi_gbl_sleep_state_names[sleep_state]); | |
493 | ||
494 | /* Evaluate the namespace object containing the values for this state */ | |
495 | ||
496 | status = acpi_ns_evaluate(info); | |
497 | if (ACPI_FAILURE(status)) { | |
498 | ACPI_DEBUG_PRINT((ACPI_DB_EXEC, | |
499 | "%s while evaluating SleepState [%s]\n", | |
500 | acpi_format_exception(status), | |
501 | info->pathname)); | |
502 | ||
503 | goto cleanup; | |
504 | } | |
505 | ||
506 | /* Must have a return object */ | |
507 | ||
508 | if (!info->return_object) { | |
509 | ACPI_ERROR((AE_INFO, "No Sleep State object returned from [%s]", | |
510 | info->pathname)); | |
511 | status = AE_NOT_EXIST; | |
512 | } | |
513 | ||
514 | /* It must be of type Package */ | |
515 | ||
3371c19c | 516 | else if (info->return_object->common.type != ACPI_TYPE_PACKAGE) { |
7db5d82d BM |
517 | ACPI_ERROR((AE_INFO, |
518 | "Sleep State return object is not a Package")); | |
519 | status = AE_AML_OPERAND_TYPE; | |
520 | } | |
521 | ||
522 | /* | |
523 | * The package must have at least two elements. NOTE (March 2005): This | |
524 | * goes against the current ACPI spec which defines this object as a | |
525 | * package with one encoded DWORD element. However, existing practice | |
526 | * by BIOS vendors seems to be to have 2 or more elements, at least | |
527 | * one per sleep type (A/B). | |
528 | */ | |
529 | else if (info->return_object->package.count < 2) { | |
530 | ACPI_ERROR((AE_INFO, | |
531 | "Sleep State return package does not have at least two elements")); | |
532 | status = AE_AML_NO_OPERAND; | |
533 | } | |
534 | ||
535 | /* The first two elements must both be of type Integer */ | |
536 | ||
3371c19c | 537 | else if (((info->return_object->package.elements[0])->common.type |
7db5d82d | 538 | != ACPI_TYPE_INTEGER) || |
3371c19c | 539 | ((info->return_object->package.elements[1])->common.type |
7db5d82d BM |
540 | != ACPI_TYPE_INTEGER)) { |
541 | ACPI_ERROR((AE_INFO, | |
d4913dc6 BM |
542 | "Sleep State return package elements are not both Integers " |
543 | "(%s, %s)", | |
7db5d82d BM |
544 | acpi_ut_get_object_type_name(info->return_object-> |
545 | package.elements[0]), | |
546 | acpi_ut_get_object_type_name(info->return_object-> | |
547 | package.elements[1]))); | |
548 | status = AE_AML_OPERAND_TYPE; | |
549 | } else { | |
550 | /* Valid _Sx_ package size, type, and value */ | |
551 | ||
552 | *sleep_type_a = (u8) | |
553 | (info->return_object->package.elements[0])->integer.value; | |
554 | *sleep_type_b = (u8) | |
555 | (info->return_object->package.elements[1])->integer.value; | |
556 | } | |
557 | ||
558 | if (ACPI_FAILURE(status)) { | |
559 | ACPI_EXCEPTION((AE_INFO, status, | |
560 | "While evaluating SleepState [%s], bad Sleep object %p type %s", | |
561 | info->pathname, info->return_object, | |
562 | acpi_ut_get_object_type_name(info-> | |
563 | return_object))); | |
564 | } | |
565 | ||
566 | acpi_ut_remove_reference(info->return_object); | |
567 | ||
568 | cleanup: | |
569 | ACPI_FREE(info); | |
570 | return_ACPI_STATUS(status); | |
571 | } | |
572 | ||
573 | ACPI_EXPORT_SYMBOL(acpi_get_sleep_type_data) |