2 /******************************************************************************
4 * Module Name: hwgpe - Low level GPE enable/disable/clear functions
6 *****************************************************************************/
9 * Copyright (C) 2000 - 2010, Intel Corp.
10 * All rights reserved.
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
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.
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.
32 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
33 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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42 * POSSIBILITY OF SUCH DAMAGES.
45 #include <acpi/acpi.h>
49 #define _COMPONENT ACPI_HARDWARE
50 ACPI_MODULE_NAME("hwgpe")
52 /* Local prototypes */
54 acpi_hw_enable_wakeup_gpe_block(struct acpi_gpe_xrupt_info
*gpe_xrupt_info
,
55 struct acpi_gpe_block_info
*gpe_block
,
58 /******************************************************************************
60 * FUNCTION: acpi_hw_get_gpe_register_bit
62 * PARAMETERS: gpe_event_info - Info block for the GPE
63 * gpe_register_info - Info block for the GPE register
67 * DESCRIPTION: Compute GPE enable mask with one bit corresponding to the given
70 ******************************************************************************/
72 u32
acpi_hw_get_gpe_register_bit(struct acpi_gpe_event_info
*gpe_event_info
,
73 struct acpi_gpe_register_info
*gpe_register_info
)
75 return (u32
)1 << (gpe_event_info
->gpe_number
-
76 gpe_register_info
->base_gpe_number
);
79 /******************************************************************************
81 * FUNCTION: acpi_hw_low_set_gpe
83 * PARAMETERS: gpe_event_info - Info block for the GPE to be disabled
84 * action - Enable or disable
88 * DESCRIPTION: Enable or disable a single GPE in its enable register.
90 ******************************************************************************/
93 acpi_hw_low_set_gpe(struct acpi_gpe_event_info
*gpe_event_info
, u8 action
)
95 struct acpi_gpe_register_info
*gpe_register_info
;
100 ACPI_FUNCTION_ENTRY();
102 /* Get the info block for the entire GPE register */
104 gpe_register_info
= gpe_event_info
->register_info
;
105 if (!gpe_register_info
) {
106 return (AE_NOT_EXIST
);
109 /* Get current value of the enable register that contains this GPE */
111 status
= acpi_hw_read(&enable_mask
, &gpe_register_info
->enable_address
);
112 if (ACPI_FAILURE(status
)) {
116 /* Set ot clear just the bit that corresponds to this GPE */
118 register_bit
= acpi_hw_get_gpe_register_bit(gpe_event_info
,
121 case ACPI_GPE_COND_ENABLE
:
122 if (!(register_bit
& gpe_register_info
->enable_for_run
))
123 return (AE_BAD_PARAMETER
);
125 case ACPI_GPE_ENABLE
:
126 ACPI_SET_BIT(enable_mask
, register_bit
);
129 case ACPI_GPE_DISABLE
:
130 ACPI_CLEAR_BIT(enable_mask
, register_bit
);
134 ACPI_ERROR((AE_INFO
, "Invalid action\n"));
135 return (AE_BAD_PARAMETER
);
138 /* Write the updated enable mask */
140 status
= acpi_hw_write(enable_mask
, &gpe_register_info
->enable_address
);
144 /******************************************************************************
146 * FUNCTION: acpi_hw_clear_gpe
148 * PARAMETERS: gpe_event_info - Info block for the GPE to be cleared
152 * DESCRIPTION: Clear the status bit for a single GPE.
154 ******************************************************************************/
156 acpi_status
acpi_hw_clear_gpe(struct acpi_gpe_event_info
* gpe_event_info
)
158 struct acpi_gpe_register_info
*gpe_register_info
;
162 ACPI_FUNCTION_ENTRY();
164 /* Get the info block for the entire GPE register */
166 gpe_register_info
= gpe_event_info
->register_info
;
167 if (!gpe_register_info
) {
168 return (AE_NOT_EXIST
);
171 register_bit
= acpi_hw_get_gpe_register_bit(gpe_event_info
,
175 * Write a one to the appropriate bit in the status register to
178 status
= acpi_hw_write(register_bit
,
179 &gpe_register_info
->status_address
);
184 /******************************************************************************
186 * FUNCTION: acpi_hw_get_gpe_status
188 * PARAMETERS: gpe_event_info - Info block for the GPE to queried
189 * event_status - Where the GPE status is returned
193 * DESCRIPTION: Return the status of a single GPE.
195 ******************************************************************************/
198 acpi_hw_get_gpe_status(struct acpi_gpe_event_info
* gpe_event_info
,
199 acpi_event_status
* event_status
)
203 struct acpi_gpe_register_info
*gpe_register_info
;
205 acpi_event_status local_event_status
= 0;
207 ACPI_FUNCTION_ENTRY();
210 return (AE_BAD_PARAMETER
);
213 /* Get the info block for the entire GPE register */
215 gpe_register_info
= gpe_event_info
->register_info
;
217 /* Get the register bitmask for this GPE */
219 register_bit
= acpi_hw_get_gpe_register_bit(gpe_event_info
,
222 /* GPE currently enabled? (enabled for runtime?) */
224 if (register_bit
& gpe_register_info
->enable_for_run
) {
225 local_event_status
|= ACPI_EVENT_FLAG_ENABLED
;
228 /* GPE enabled for wake? */
230 if (register_bit
& gpe_register_info
->enable_for_wake
) {
231 local_event_status
|= ACPI_EVENT_FLAG_WAKE_ENABLED
;
234 /* GPE currently active (status bit == 1)? */
236 status
= acpi_hw_read(&in_byte
, &gpe_register_info
->status_address
);
237 if (ACPI_FAILURE(status
)) {
241 if (register_bit
& in_byte
) {
242 local_event_status
|= ACPI_EVENT_FLAG_SET
;
245 /* Set return value */
247 (*event_status
) = local_event_status
;
251 /******************************************************************************
253 * FUNCTION: acpi_hw_disable_gpe_block
255 * PARAMETERS: gpe_xrupt_info - GPE Interrupt info
256 * gpe_block - Gpe Block info
260 * DESCRIPTION: Disable all GPEs within a single GPE block
262 ******************************************************************************/
265 acpi_hw_disable_gpe_block(struct acpi_gpe_xrupt_info
*gpe_xrupt_info
,
266 struct acpi_gpe_block_info
*gpe_block
, void *context
)
271 /* Examine each GPE Register within the block */
273 for (i
= 0; i
< gpe_block
->register_count
; i
++) {
275 /* Disable all GPEs in this register */
279 &gpe_block
->register_info
[i
].enable_address
);
280 if (ACPI_FAILURE(status
)) {
288 /******************************************************************************
290 * FUNCTION: acpi_hw_clear_gpe_block
292 * PARAMETERS: gpe_xrupt_info - GPE Interrupt info
293 * gpe_block - Gpe Block info
297 * DESCRIPTION: Clear status bits for all GPEs within a single GPE block
299 ******************************************************************************/
302 acpi_hw_clear_gpe_block(struct acpi_gpe_xrupt_info
*gpe_xrupt_info
,
303 struct acpi_gpe_block_info
*gpe_block
, void *context
)
308 /* Examine each GPE Register within the block */
310 for (i
= 0; i
< gpe_block
->register_count
; i
++) {
312 /* Clear status on all GPEs in this register */
316 &gpe_block
->register_info
[i
].status_address
);
317 if (ACPI_FAILURE(status
)) {
325 /******************************************************************************
327 * FUNCTION: acpi_hw_enable_runtime_gpe_block
329 * PARAMETERS: gpe_xrupt_info - GPE Interrupt info
330 * gpe_block - Gpe Block info
334 * DESCRIPTION: Enable all "runtime" GPEs within a single GPE block. Includes
335 * combination wake/run GPEs.
337 ******************************************************************************/
340 acpi_hw_enable_runtime_gpe_block(struct acpi_gpe_xrupt_info
*gpe_xrupt_info
,
341 struct acpi_gpe_block_info
*gpe_block
, void *context
)
346 /* NOTE: assumes that all GPEs are currently disabled */
348 /* Examine each GPE Register within the block */
350 for (i
= 0; i
< gpe_block
->register_count
; i
++) {
351 if (!gpe_block
->register_info
[i
].enable_for_run
) {
355 /* Enable all "runtime" GPEs in this register */
358 acpi_hw_write(gpe_block
->register_info
[i
].enable_for_run
,
359 &gpe_block
->register_info
[i
].enable_address
);
360 if (ACPI_FAILURE(status
)) {
368 /******************************************************************************
370 * FUNCTION: acpi_hw_enable_wakeup_gpe_block
372 * PARAMETERS: gpe_xrupt_info - GPE Interrupt info
373 * gpe_block - Gpe Block info
377 * DESCRIPTION: Enable all "wake" GPEs within a single GPE block. Includes
378 * combination wake/run GPEs.
380 ******************************************************************************/
383 acpi_hw_enable_wakeup_gpe_block(struct acpi_gpe_xrupt_info
*gpe_xrupt_info
,
384 struct acpi_gpe_block_info
*gpe_block
,
390 /* Examine each GPE Register within the block */
392 for (i
= 0; i
< gpe_block
->register_count
; i
++) {
393 if (!gpe_block
->register_info
[i
].enable_for_wake
) {
397 /* Enable all "wake" GPEs in this register */
400 acpi_hw_write(gpe_block
->register_info
[i
].enable_for_wake
,
401 &gpe_block
->register_info
[i
].enable_address
);
402 if (ACPI_FAILURE(status
)) {
410 /******************************************************************************
412 * FUNCTION: acpi_hw_disable_all_gpes
418 * DESCRIPTION: Disable and clear all GPEs in all GPE blocks
420 ******************************************************************************/
422 acpi_status
acpi_hw_disable_all_gpes(void)
426 ACPI_FUNCTION_TRACE(hw_disable_all_gpes
);
428 status
= acpi_ev_walk_gpe_list(acpi_hw_disable_gpe_block
, NULL
);
429 status
= acpi_ev_walk_gpe_list(acpi_hw_clear_gpe_block
, NULL
);
430 return_ACPI_STATUS(status
);
433 /******************************************************************************
435 * FUNCTION: acpi_hw_enable_all_runtime_gpes
441 * DESCRIPTION: Enable all "runtime" GPEs, in all GPE blocks
443 ******************************************************************************/
445 acpi_status
acpi_hw_enable_all_runtime_gpes(void)
449 ACPI_FUNCTION_TRACE(hw_enable_all_runtime_gpes
);
451 status
= acpi_ev_walk_gpe_list(acpi_hw_enable_runtime_gpe_block
, NULL
);
452 return_ACPI_STATUS(status
);
455 /******************************************************************************
457 * FUNCTION: acpi_hw_enable_all_wakeup_gpes
463 * DESCRIPTION: Enable all "wakeup" GPEs, in all GPE blocks
465 ******************************************************************************/
467 acpi_status
acpi_hw_enable_all_wakeup_gpes(void)
471 ACPI_FUNCTION_TRACE(hw_enable_all_wakeup_gpes
);
473 status
= acpi_ev_walk_gpe_list(acpi_hw_enable_wakeup_gpe_block
, NULL
);
474 return_ACPI_STATUS(status
);