1 /* Copyright (c) 2014, The Linux Foundation. All rights reserved.
2 *
3 * Redistribution and use in source and binary forms, with or without
4 * modification, are permitted provided that the following conditions are
5 * met:
6 * * Redistributions of source code must retain the above copyright
7 * notice, this list of conditions and the following disclaimer.
8 * * Redistributions in binary form must reproduce the above
9 * copyright notice, this list of conditions and the following
10 * disclaimer in the documentation and/or other materials provided
11 * with the distribution.
12 * * Neither the name of The Linux Foundation nor the names of its
13 * contributors may be used to endorse or promote products derived
14 * from this software without specific prior written permission.
15 *
16 * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
17 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
18 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
20 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
23 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
24 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
25 * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
26 * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 *
28 */
29
30 #define LOG_TAG "audio_hw_pm"
31 /*#define LOG_NDEBUG 0*/
32
33 #include "pm.h"
34 #include <cutils/log.h>
35
36 static s_audio_subsys audio_ss;
37
audio_extn_pm_vote(void)38 int audio_extn_pm_vote(void)
39 {
40 int err, intfd, ret;
41 FILE *fd;
42 enum pm_event subsys_state;
43 char halPropVal[PROPERTY_VALUE_MAX];
44 bool prop_unload_image = false;
45 bool pm_reg = false;
46 bool pm_supp = false;
47
48 platform_get_subsys_image_name((char *)&audio_ss.img_name);
49 ALOGD("%s: register with peripheral manager for %s",__func__, audio_ss.img_name);
50 ret = pm_client_register(audio_extn_pm_event_notifier,
51 &audio_ss,
52 audio_ss.img_name,
53 PM_CLIENT_NAME,
54 &subsys_state,
55 &audio_ss.pm_handle);
56 if (ret == PM_RET_SUCCESS) {
57 pm_reg = true;
58 pm_supp = true;
59 ALOGV("%s: registered with peripheral manager for %s",
60 __func__, audio_ss.img_name);
61 } else if (ret == PM_RET_UNSUPPORTED) {
62 pm_reg = true;
63 pm_supp = false;
64 ALOGV("%s: peripheral mgr unsupported for %s",
65 __func__, audio_ss.img_name);
66 return ret;
67 } else {
68 return ret;
69 }
70 if (pm_supp == true &&
71 pm_reg == true) {
72 ALOGD("%s: Voting for subsystem power up", __func__);
73 pm_client_connect(audio_ss.pm_handle);
74
75 if (property_get("sys.audio.init", halPropVal, NULL)) {
76 prop_unload_image = !(strncmp("false", halPropVal, sizeof("false")));
77 }
78 /*
79 * adsp-loader loads modem/adsp image at boot up to play boot tone,
80 * before peripheral manager service is up. Once PM is up, vote to PM
81 * and unload the image to give control to PM to load/unload image
82 */
83 if (prop_unload_image) {
84 intfd = open(BOOT_IMG_SYSFS_PATH, O_WRONLY);
85 if (intfd == -1) {
86 ALOGE("failed to open fd in write mode, %d", errno);
87 } else {
88 ALOGD("%s: write to sysfs to unload image", __func__);
89 err = write(intfd, UNLOAD_IMAGE, 1);
90 close(intfd);
91 property_set("sys.audio.init", "true");
92 }
93 }
94 }
95 return 0;
96 }
97
audio_extn_pm_unvote(void)98 void audio_extn_pm_unvote(void)
99 {
100 ALOGD("%s", __func__);
101 if (audio_ss.pm_handle) {
102 pm_client_disconnect(audio_ss.pm_handle);
103 pm_client_unregister(audio_ss.pm_handle);
104 }
105 }
106
audio_extn_pm_set_parameters(struct str_parms * parms)107 void audio_extn_pm_set_parameters(struct str_parms *parms)
108 {
109 int ret;
110 char value[32];
111
112 ret = str_parms_get_str(parms, AUDIO_PARAMETER_KEY_DEV_SHUTDOWN, value, sizeof(value));
113 if (ret >= 0) {
114 if (strstr(value, "true")) {
115 ALOGD("Device shutdown notification received, unregister with PM");
116 audio_extn_pm_unvote();
117 }
118 }
119 }
120
audio_extn_pm_event_notifier(void * client_data,enum pm_event event)121 void audio_extn_pm_event_notifier(void *client_data, enum pm_event event)
122 {
123 pm_client_event_acknowledge(audio_ss.pm_handle, event);
124
125 /* Closing and re-opening of session is done based on snd card status given
126 * by AudioDaemon during SS offline/online (legacy code). Just return for now.
127 */
128 switch (event) {
129 case EVENT_PERIPH_GOING_OFFLINE:
130 ALOGV("%s: %s is going offline", __func__, audio_ss.img_name);
131 break;
132
133 case EVENT_PERIPH_IS_OFFLINE:
134 ALOGV("%s: %s is offline", __func__, audio_ss.img_name);
135 break;
136
137 case EVENT_PERIPH_GOING_ONLINE:
138 ALOGV("%s: %s is going online", __func__, audio_ss.img_name);
139 break;
140
141 case EVENT_PERIPH_IS_ONLINE:
142 ALOGV("%s: %s is online", __func__, audio_ss.img_name);
143 break;
144
145 default:
146 ALOGV("%s: invalid event received from PM", __func__);
147 break;
148 }
149 }
150