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7db5d82d BM |
1 | /****************************************************************************** |
2 | * | |
3 | * Module Name: hwxface - Public ACPICA hardware interfaces | |
4 | * | |
5 | *****************************************************************************/ | |
6 | ||
7 | /* | |
77848130 | 8 | * Copyright (C) 2000 - 2012, Intel Corp. |
7db5d82d BM |
9 | * All rights reserved. |
10 | * | |
11 | * Redistribution and use in source and binary forms, with or without | |
12 | * modification, are permitted provided that the following conditions | |
13 | * are met: | |
14 | * 1. Redistributions of source code must retain the above copyright | |
15 | * notice, this list of conditions, and the following disclaimer, | |
16 | * without modification. | |
17 | * 2. Redistributions in binary form must reproduce at minimum a disclaimer | |
18 | * substantially similar to the "NO WARRANTY" disclaimer below | |
19 | * ("Disclaimer") and any redistribution must be conditioned upon | |
20 | * including a substantially similar Disclaimer requirement for further | |
21 | * binary redistribution. | |
22 | * 3. Neither the names of the above-listed copyright holders nor the names | |
23 | * of any contributors may be used to endorse or promote products derived | |
24 | * from this software without specific prior written permission. | |
25 | * | |
26 | * Alternatively, this software may be distributed under the terms of the | |
27 | * GNU General Public License ("GPL") version 2 as published by the Free | |
28 | * Software Foundation. | |
29 | * | |
30 | * NO WARRANTY | |
31 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | |
32 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | |
33 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR | |
34 | * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT | |
35 | * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
36 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
37 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
38 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, | |
39 | * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING | |
40 | * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE | |
41 | * POSSIBILITY OF SUCH DAMAGES. | |
42 | */ | |
43 | ||
214f2c90 | 44 | #include <linux/export.h> |
7db5d82d | 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 | ||
19244ad0 LT |
76 | if (!(acpi_gbl_FADT.flags & ACPI_FADT_RESET_REGISTER) || |
77 | !reset_reg->address) { | |
d3fd902d BM |
78 | return_ACPI_STATUS(AE_NOT_EXIST); |
79 | } | |
80 | ||
8a964236 BM |
81 | if (reset_reg->space_id == ACPI_ADR_SPACE_SYSTEM_IO) { |
82 | /* | |
f17d9cbf MG |
83 | * For I/O space, write directly to the OSL. This |
84 | * bypasses the port validation mechanism, which may | |
85 | * block a valid write to the reset register. Spec | |
86 | * section 4.7.3.6 requires register width to be 8. | |
8a964236 BM |
87 | */ |
88 | status = | |
89 | acpi_os_write_port((acpi_io_address) reset_reg->address, | |
f17d9cbf | 90 | acpi_gbl_FADT.reset_value, 8); |
8a964236 BM |
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 | * | |
ba494bee BM |
106 | * PARAMETERS: value - Where the value is returned |
107 | * reg - GAS register structure | |
7db5d82d BM |
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. | |
ba494bee | 115 | * space_ID must be system_memory or system_IO. |
c6b5774c BM |
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 | ||
c6b5774c | 140 | /* Initialize entire 64-bit return value to zero */ |
7db5d82d | 141 | |
c6b5774c BM |
142 | *return_value = 0; |
143 | value = 0; | |
7db5d82d BM |
144 | |
145 | /* | |
88dcb04a BM |
146 | * Two address spaces supported: Memory or IO. PCI_Config is |
147 | * not supported here because the GAS structure is insufficient | |
7db5d82d | 148 | */ |
c6b5774c BM |
149 | if (reg->space_id == ACPI_ADR_SPACE_SYSTEM_MEMORY) { |
150 | status = acpi_os_read_memory((acpi_physical_address) | |
653f4b53 BM |
151 | address, return_value, |
152 | reg->bit_width); | |
c6b5774c BM |
153 | if (ACPI_FAILURE(status)) { |
154 | return (status); | |
155 | } | |
653f4b53 | 156 | } else { /* ACPI_ADR_SPACE_SYSTEM_IO, validated earlier */ |
c6b5774c | 157 | |
653f4b53 BM |
158 | width = reg->bit_width; |
159 | if (width == 64) { | |
160 | width = 32; /* Break into two 32-bit transfers */ | |
c6b5774c | 161 | } |
c6b5774c BM |
162 | |
163 | status = acpi_hw_read_port((acpi_io_address) | |
164 | address, &value, width); | |
165 | if (ACPI_FAILURE(status)) { | |
166 | return (status); | |
167 | } | |
168 | *return_value = value; | |
169 | ||
170 | if (reg->bit_width == 64) { | |
171 | ||
172 | /* Read the top 32 bits */ | |
173 | ||
174 | status = acpi_hw_read_port((acpi_io_address) | |
175 | (address + 4), &value, 32); | |
176 | if (ACPI_FAILURE(status)) { | |
177 | return (status); | |
178 | } | |
179 | *return_value |= ((u64)value << 32); | |
180 | } | |
7db5d82d BM |
181 | } |
182 | ||
183 | ACPI_DEBUG_PRINT((ACPI_DB_IO, | |
c6b5774c BM |
184 | "Read: %8.8X%8.8X width %2d from %8.8X%8.8X (%s)\n", |
185 | ACPI_FORMAT_UINT64(*return_value), reg->bit_width, | |
186 | ACPI_FORMAT_UINT64(address), | |
7db5d82d BM |
187 | acpi_ut_get_region_name(reg->space_id))); |
188 | ||
189 | return (status); | |
190 | } | |
191 | ||
192 | ACPI_EXPORT_SYMBOL(acpi_read) | |
193 | ||
194 | /****************************************************************************** | |
195 | * | |
196 | * FUNCTION: acpi_write | |
197 | * | |
ba494bee BM |
198 | * PARAMETERS: value - Value to be written |
199 | * reg - GAS register structure | |
7db5d82d BM |
200 | * |
201 | * RETURN: Status | |
202 | * | |
203 | * DESCRIPTION: Write to either memory or IO space. | |
204 | * | |
205 | ******************************************************************************/ | |
c6b5774c | 206 | acpi_status acpi_write(u64 value, struct acpi_generic_address *reg) |
7db5d82d BM |
207 | { |
208 | u32 width; | |
209 | u64 address; | |
210 | acpi_status status; | |
211 | ||
212 | ACPI_FUNCTION_NAME(acpi_write); | |
213 | ||
c6b5774c | 214 | /* Validate contents of the GAS register. Allow 64-bit transfers */ |
7db5d82d | 215 | |
c6b5774c BM |
216 | status = acpi_hw_validate_register(reg, 64, &address); |
217 | if (ACPI_FAILURE(status)) { | |
218 | return (status); | |
7db5d82d BM |
219 | } |
220 | ||
7db5d82d | 221 | /* |
c6b5774c BM |
222 | * Two address spaces supported: Memory or IO. PCI_Config is |
223 | * not supported here because the GAS structure is insufficient | |
7db5d82d | 224 | */ |
c6b5774c BM |
225 | if (reg->space_id == ACPI_ADR_SPACE_SYSTEM_MEMORY) { |
226 | status = acpi_os_write_memory((acpi_physical_address) | |
653f4b53 | 227 | address, value, reg->bit_width); |
c6b5774c BM |
228 | if (ACPI_FAILURE(status)) { |
229 | return (status); | |
230 | } | |
653f4b53 | 231 | } else { /* ACPI_ADR_SPACE_SYSTEM_IO, validated earlier */ |
c6b5774c | 232 | |
653f4b53 BM |
233 | width = reg->bit_width; |
234 | if (width == 64) { | |
235 | width = 32; /* Break into two 32-bit transfers */ | |
c6b5774c | 236 | } |
c6b5774c BM |
237 | |
238 | status = acpi_hw_write_port((acpi_io_address) | |
239 | address, ACPI_LODWORD(value), | |
7db5d82d | 240 | width); |
c6b5774c BM |
241 | if (ACPI_FAILURE(status)) { |
242 | return (status); | |
243 | } | |
244 | ||
245 | if (reg->bit_width == 64) { | |
246 | status = acpi_hw_write_port((acpi_io_address) | |
247 | (address + 4), | |
248 | ACPI_HIDWORD(value), 32); | |
249 | if (ACPI_FAILURE(status)) { | |
250 | return (status); | |
251 | } | |
252 | } | |
7db5d82d BM |
253 | } |
254 | ||
255 | ACPI_DEBUG_PRINT((ACPI_DB_IO, | |
c6b5774c BM |
256 | "Wrote: %8.8X%8.8X width %2d to %8.8X%8.8X (%s)\n", |
257 | ACPI_FORMAT_UINT64(value), reg->bit_width, | |
258 | ACPI_FORMAT_UINT64(address), | |
7db5d82d BM |
259 | acpi_ut_get_region_name(reg->space_id))); |
260 | ||
261 | return (status); | |
262 | } | |
263 | ||
264 | ACPI_EXPORT_SYMBOL(acpi_write) | |
265 | ||
33620c54 | 266 | #if (!ACPI_REDUCED_HARDWARE) |
7db5d82d BM |
267 | /******************************************************************************* |
268 | * | |
50ffba1b | 269 | * FUNCTION: acpi_read_bit_register |
7db5d82d | 270 | * |
9892dd23 BM |
271 | * PARAMETERS: register_id - ID of ACPI Bit Register to access |
272 | * return_value - Value that was read from the register, | |
273 | * normalized to bit position zero. | |
7db5d82d | 274 | * |
9892dd23 | 275 | * RETURN: Status and the value read from the specified Register. Value |
7db5d82d BM |
276 | * returned is normalized to bit0 (is shifted all the way right) |
277 | * | |
278 | * DESCRIPTION: ACPI bit_register read function. Does not acquire the HW lock. | |
279 | * | |
9892dd23 BM |
280 | * SUPPORTS: Bit fields in PM1 Status, PM1 Enable, PM1 Control, and |
281 | * PM2 Control. | |
282 | * | |
283 | * Note: The hardware lock is not required when reading the ACPI bit registers | |
284 | * since almost all of them are single bit and it does not matter that | |
285 | * the parent hardware register can be split across two physical | |
286 | * registers. The only multi-bit field is SLP_TYP in the PM1 control | |
287 | * register, but this field does not cross an 8-bit boundary (nor does | |
288 | * it make much sense to actually read this field.) | |
289 | * | |
7db5d82d | 290 | ******************************************************************************/ |
50ffba1b | 291 | acpi_status acpi_read_bit_register(u32 register_id, u32 *return_value) |
7db5d82d | 292 | { |
7db5d82d | 293 | struct acpi_bit_register_info *bit_reg_info; |
88dcb04a BM |
294 | u32 register_value; |
295 | u32 value; | |
7db5d82d BM |
296 | acpi_status status; |
297 | ||
88dcb04a | 298 | ACPI_FUNCTION_TRACE_U32(acpi_read_bit_register, register_id); |
7db5d82d BM |
299 | |
300 | /* Get the info structure corresponding to the requested ACPI Register */ | |
301 | ||
302 | bit_reg_info = acpi_hw_get_bit_register_info(register_id); | |
303 | if (!bit_reg_info) { | |
304 | return_ACPI_STATUS(AE_BAD_PARAMETER); | |
305 | } | |
306 | ||
9892dd23 | 307 | /* Read the entire parent register */ |
7db5d82d BM |
308 | |
309 | status = acpi_hw_register_read(bit_reg_info->parent_register, | |
310 | ®ister_value); | |
88dcb04a BM |
311 | if (ACPI_FAILURE(status)) { |
312 | return_ACPI_STATUS(status); | |
313 | } | |
7db5d82d | 314 | |
88dcb04a | 315 | /* Normalize the value that was read, mask off other bits */ |
7db5d82d | 316 | |
88dcb04a BM |
317 | value = ((register_value & bit_reg_info->access_bit_mask) |
318 | >> bit_reg_info->bit_position); | |
7db5d82d | 319 | |
88dcb04a BM |
320 | ACPI_DEBUG_PRINT((ACPI_DB_IO, |
321 | "BitReg %X, ParentReg %X, Actual %8.8X, ReturnValue %8.8X\n", | |
322 | register_id, bit_reg_info->parent_register, | |
323 | register_value, value)); | |
7db5d82d | 324 | |
88dcb04a BM |
325 | *return_value = value; |
326 | return_ACPI_STATUS(AE_OK); | |
7db5d82d BM |
327 | } |
328 | ||
50ffba1b | 329 | ACPI_EXPORT_SYMBOL(acpi_read_bit_register) |
7db5d82d BM |
330 | |
331 | /******************************************************************************* | |
332 | * | |
50ffba1b | 333 | * FUNCTION: acpi_write_bit_register |
7db5d82d | 334 | * |
9892dd23 BM |
335 | * PARAMETERS: register_id - ID of ACPI Bit Register to access |
336 | * Value - Value to write to the register, in bit | |
42b2aa86 | 337 | * position zero. The bit is automatically |
9892dd23 | 338 | * shifted to the correct position. |
7db5d82d BM |
339 | * |
340 | * RETURN: Status | |
341 | * | |
9892dd23 BM |
342 | * DESCRIPTION: ACPI Bit Register write function. Acquires the hardware lock |
343 | * since most operations require a read/modify/write sequence. | |
344 | * | |
345 | * SUPPORTS: Bit fields in PM1 Status, PM1 Enable, PM1 Control, and | |
346 | * PM2 Control. | |
7db5d82d | 347 | * |
88dcb04a BM |
348 | * Note that at this level, the fact that there may be actually two |
349 | * hardware registers (A and B - and B may not exist) is abstracted. | |
350 | * | |
7db5d82d | 351 | ******************************************************************************/ |
50ffba1b | 352 | acpi_status acpi_write_bit_register(u32 register_id, u32 value) |
7db5d82d | 353 | { |
7db5d82d | 354 | struct acpi_bit_register_info *bit_reg_info; |
7db5d82d | 355 | acpi_cpu_flags lock_flags; |
88dcb04a BM |
356 | u32 register_value; |
357 | acpi_status status = AE_OK; | |
7db5d82d | 358 | |
50ffba1b | 359 | ACPI_FUNCTION_TRACE_U32(acpi_write_bit_register, register_id); |
7db5d82d BM |
360 | |
361 | /* Get the info structure corresponding to the requested ACPI Register */ | |
362 | ||
363 | bit_reg_info = acpi_hw_get_bit_register_info(register_id); | |
364 | if (!bit_reg_info) { | |
7db5d82d BM |
365 | return_ACPI_STATUS(AE_BAD_PARAMETER); |
366 | } | |
367 | ||
368 | lock_flags = acpi_os_acquire_lock(acpi_gbl_hardware_lock); | |
369 | ||
7db5d82d | 370 | /* |
88dcb04a BM |
371 | * At this point, we know that the parent register is one of the |
372 | * following: PM1 Status, PM1 Enable, PM1 Control, or PM2 Control | |
7db5d82d | 373 | */ |
88dcb04a | 374 | if (bit_reg_info->parent_register != ACPI_REGISTER_PM1_STATUS) { |
7db5d82d | 375 | /* |
88dcb04a BM |
376 | * 1) Case for PM1 Enable, PM1 Control, and PM2 Control |
377 | * | |
378 | * Perform a register read to preserve the bits that we are not | |
379 | * interested in | |
7db5d82d | 380 | */ |
88dcb04a | 381 | status = acpi_hw_register_read(bit_reg_info->parent_register, |
7db5d82d BM |
382 | ®ister_value); |
383 | if (ACPI_FAILURE(status)) { | |
384 | goto unlock_and_exit; | |
385 | } | |
386 | ||
88dcb04a BM |
387 | /* |
388 | * Insert the input bit into the value that was just read | |
389 | * and write the register | |
390 | */ | |
7db5d82d BM |
391 | ACPI_REGISTER_INSERT_VALUE(register_value, |
392 | bit_reg_info->bit_position, | |
393 | bit_reg_info->access_bit_mask, | |
394 | value); | |
395 | ||
88dcb04a BM |
396 | status = acpi_hw_register_write(bit_reg_info->parent_register, |
397 | register_value); | |
398 | } else { | |
399 | /* | |
400 | * 2) Case for PM1 Status | |
401 | * | |
402 | * The Status register is different from the rest. Clear an event | |
403 | * by writing 1, writing 0 has no effect. So, the only relevant | |
404 | * information is the single bit we're interested in, all others | |
405 | * should be written as 0 so they will be left unchanged. | |
406 | */ | |
407 | register_value = ACPI_REGISTER_PREPARE_BITS(value, | |
408 | bit_reg_info-> | |
409 | bit_position, | |
410 | bit_reg_info-> | |
411 | access_bit_mask); | |
7db5d82d | 412 | |
88dcb04a | 413 | /* No need to write the register if value is all zeros */ |
7db5d82d | 414 | |
88dcb04a BM |
415 | if (register_value) { |
416 | status = | |
417 | acpi_hw_register_write(ACPI_REGISTER_PM1_STATUS, | |
418 | register_value); | |
419 | } | |
7db5d82d BM |
420 | } |
421 | ||
88dcb04a BM |
422 | ACPI_DEBUG_PRINT((ACPI_DB_IO, |
423 | "BitReg %X, ParentReg %X, Value %8.8X, Actual %8.8X\n", | |
424 | register_id, bit_reg_info->parent_register, value, | |
425 | register_value)); | |
7db5d82d | 426 | |
88dcb04a | 427 | unlock_and_exit: |
7db5d82d | 428 | |
88dcb04a | 429 | acpi_os_release_lock(acpi_gbl_hardware_lock, lock_flags); |
7db5d82d BM |
430 | return_ACPI_STATUS(status); |
431 | } | |
432 | ||
50ffba1b | 433 | ACPI_EXPORT_SYMBOL(acpi_write_bit_register) |
33620c54 | 434 | #endif /* !ACPI_REDUCED_HARDWARE */ |
7db5d82d BM |
435 | /******************************************************************************* |
436 | * | |
437 | * FUNCTION: acpi_get_sleep_type_data | |
438 | * | |
439 | * PARAMETERS: sleep_state - Numeric sleep state | |
440 | * *sleep_type_a - Where SLP_TYPa is returned | |
441 | * *sleep_type_b - Where SLP_TYPb is returned | |
442 | * | |
ba494bee | 443 | * RETURN: status - ACPI status |
7db5d82d BM |
444 | * |
445 | * DESCRIPTION: Obtain the SLP_TYPa and SLP_TYPb values for the requested sleep | |
446 | * state. | |
447 | * | |
448 | ******************************************************************************/ | |
449 | acpi_status | |
450 | acpi_get_sleep_type_data(u8 sleep_state, u8 *sleep_type_a, u8 *sleep_type_b) | |
451 | { | |
452 | acpi_status status = AE_OK; | |
453 | struct acpi_evaluate_info *info; | |
454 | ||
455 | ACPI_FUNCTION_TRACE(acpi_get_sleep_type_data); | |
456 | ||
457 | /* Validate parameters */ | |
458 | ||
459 | if ((sleep_state > ACPI_S_STATES_MAX) || !sleep_type_a || !sleep_type_b) { | |
460 | return_ACPI_STATUS(AE_BAD_PARAMETER); | |
461 | } | |
462 | ||
463 | /* Allocate the evaluation information block */ | |
464 | ||
465 | info = ACPI_ALLOCATE_ZEROED(sizeof(struct acpi_evaluate_info)); | |
466 | if (!info) { | |
467 | return_ACPI_STATUS(AE_NO_MEMORY); | |
468 | } | |
469 | ||
470 | info->pathname = | |
471 | ACPI_CAST_PTR(char, acpi_gbl_sleep_state_names[sleep_state]); | |
472 | ||
473 | /* Evaluate the namespace object containing the values for this state */ | |
474 | ||
475 | status = acpi_ns_evaluate(info); | |
476 | if (ACPI_FAILURE(status)) { | |
477 | ACPI_DEBUG_PRINT((ACPI_DB_EXEC, | |
478 | "%s while evaluating SleepState [%s]\n", | |
479 | acpi_format_exception(status), | |
480 | info->pathname)); | |
481 | ||
482 | goto cleanup; | |
483 | } | |
484 | ||
485 | /* Must have a return object */ | |
486 | ||
487 | if (!info->return_object) { | |
488 | ACPI_ERROR((AE_INFO, "No Sleep State object returned from [%s]", | |
489 | info->pathname)); | |
490 | status = AE_NOT_EXIST; | |
491 | } | |
492 | ||
493 | /* It must be of type Package */ | |
494 | ||
3371c19c | 495 | else if (info->return_object->common.type != ACPI_TYPE_PACKAGE) { |
7db5d82d BM |
496 | ACPI_ERROR((AE_INFO, |
497 | "Sleep State return object is not a Package")); | |
498 | status = AE_AML_OPERAND_TYPE; | |
499 | } | |
500 | ||
501 | /* | |
502 | * The package must have at least two elements. NOTE (March 2005): This | |
503 | * goes against the current ACPI spec which defines this object as a | |
504 | * package with one encoded DWORD element. However, existing practice | |
505 | * by BIOS vendors seems to be to have 2 or more elements, at least | |
506 | * one per sleep type (A/B). | |
507 | */ | |
508 | else if (info->return_object->package.count < 2) { | |
509 | ACPI_ERROR((AE_INFO, | |
510 | "Sleep State return package does not have at least two elements")); | |
511 | status = AE_AML_NO_OPERAND; | |
512 | } | |
513 | ||
514 | /* The first two elements must both be of type Integer */ | |
515 | ||
3371c19c | 516 | else if (((info->return_object->package.elements[0])->common.type |
7db5d82d | 517 | != ACPI_TYPE_INTEGER) || |
3371c19c | 518 | ((info->return_object->package.elements[1])->common.type |
7db5d82d BM |
519 | != ACPI_TYPE_INTEGER)) { |
520 | ACPI_ERROR((AE_INFO, | |
d4913dc6 BM |
521 | "Sleep State return package elements are not both Integers " |
522 | "(%s, %s)", | |
7db5d82d BM |
523 | acpi_ut_get_object_type_name(info->return_object-> |
524 | package.elements[0]), | |
525 | acpi_ut_get_object_type_name(info->return_object-> | |
526 | package.elements[1]))); | |
527 | status = AE_AML_OPERAND_TYPE; | |
528 | } else { | |
529 | /* Valid _Sx_ package size, type, and value */ | |
530 | ||
531 | *sleep_type_a = (u8) | |
532 | (info->return_object->package.elements[0])->integer.value; | |
533 | *sleep_type_b = (u8) | |
534 | (info->return_object->package.elements[1])->integer.value; | |
535 | } | |
536 | ||
537 | if (ACPI_FAILURE(status)) { | |
538 | ACPI_EXCEPTION((AE_INFO, status, | |
539 | "While evaluating SleepState [%s], bad Sleep object %p type %s", | |
540 | info->pathname, info->return_object, | |
541 | acpi_ut_get_object_type_name(info-> | |
542 | return_object))); | |
543 | } | |
544 | ||
545 | acpi_ut_remove_reference(info->return_object); | |
546 | ||
547 | cleanup: | |
548 | ACPI_FREE(info); | |
549 | return_ACPI_STATUS(status); | |
550 | } | |
551 | ||
552 | ACPI_EXPORT_SYMBOL(acpi_get_sleep_type_data) |