453 lines
12 KiB
C
453 lines
12 KiB
C
/*
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* Copyright (c) 2014-2016, The Linux Foundation. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met:
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials provided
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* with the distribution.
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* * Neither the name of The Linux Foundation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
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* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
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* OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
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* IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#define LOG_TAG "platform_info"
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#define LOG_NDDEBUG 0
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#include <errno.h>
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#include <stdio.h>
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#include <expat.h>
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#include <cutils/log.h>
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#include <cutils/str_parms.h>
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#include <audio_hw.h>
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#include "platform_api.h"
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#include <platform.h>
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#define BUF_SIZE 1024
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typedef enum {
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ROOT,
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ACDB,
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BITWIDTH,
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PCM_ID,
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BACKEND_NAME,
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INTERFACE_NAME,
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CONFIG_PARAMS,
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} section_t;
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typedef void (* section_process_fn)(const XML_Char **attr);
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static void process_acdb_id(const XML_Char **attr);
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static void process_bit_width(const XML_Char **attr);
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static void process_pcm_id(const XML_Char **attr);
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static void process_backend_name(const XML_Char **attr);
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static void process_interface_name(const XML_Char **attr);
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static void process_config_params(const XML_Char **attr);
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static void process_root(const XML_Char **attr);
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static section_process_fn section_table[] = {
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[ROOT] = process_root,
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[ACDB] = process_acdb_id,
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[BITWIDTH] = process_bit_width,
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[PCM_ID] = process_pcm_id,
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[BACKEND_NAME] = process_backend_name,
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[INTERFACE_NAME] = process_interface_name,
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[CONFIG_PARAMS] = process_config_params,
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};
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static section_t section;
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struct platform_info {
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void *platform;
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struct str_parms *kvpairs;
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};
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static struct platform_info my_data;
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/*
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* <audio_platform_info>
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* <acdb_ids>
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* <device name="???" acdb_id="???"/>
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* ...
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* ...
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* </acdb_ids>
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* <backend_names>
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* <device name="???" backend="???"/>
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* ...
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* ...
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* </backend_names>
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* <pcm_ids>
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* <usecase name="???" type="in/out" id="???"/>
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* ...
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* ...
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* </pcm_ids>
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* <interface_names>
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* <device name="Use audio device name here, not sound device name" interface="PRIMARY_I2S" codec_type="external/internal"/>
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* ...
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* ...
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* </interface_names>
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* <config_params>
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* <param key="snd_card_name" value="msm8994-tomtom-mtp-snd-card"/>
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* ...
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* ...
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* </config_params>
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* </audio_platform_info>
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*/
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static void process_root(const XML_Char **attr __unused)
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{
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}
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/* mapping from usecase to pcm dev id */
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static void process_pcm_id(const XML_Char **attr)
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{
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int index;
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if (strcmp(attr[0], "name") != 0) {
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ALOGE("%s: 'name' not found, no pcm_id set!", __func__);
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goto done;
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}
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index = platform_get_usecase_index((char *)attr[1]);
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if (index < 0) {
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ALOGE("%s: usecase %s not found!",
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__func__, attr[1]);
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goto done;
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}
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if (strcmp(attr[2], "type") != 0) {
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ALOGE("%s: usecase type not mentioned", __func__);
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goto done;
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}
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int type = -1;
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if (!strcasecmp((char *)attr[3], "in")) {
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type = 1;
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} else if (!strcasecmp((char *)attr[3], "out")) {
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type = 0;
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} else {
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ALOGE("%s: type must be IN or OUT", __func__);
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goto done;
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}
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if (strcmp(attr[4], "id") != 0) {
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ALOGE("%s: usecase id not mentioned", __func__);
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goto done;
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}
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int id = atoi((char *)attr[5]);
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if (platform_set_usecase_pcm_id(index, type, id) < 0) {
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ALOGE("%s: usecase %s type %d id %d was not set!",
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__func__, attr[1], type, id);
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goto done;
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}
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done:
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return;
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}
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/* backend to be used for a device */
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static void process_backend_name(const XML_Char **attr)
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{
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int index;
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char *hw_interface = NULL;
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if (strcmp(attr[0], "name") != 0) {
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ALOGE("%s: 'name' not found, no ACDB ID set!", __func__);
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goto done;
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}
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index = platform_get_snd_device_index((char *)attr[1]);
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if (index < 0) {
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ALOGE("%s: Device %s not found, no ACDB ID set!",
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__func__, attr[1]);
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goto done;
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}
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if (strcmp(attr[2], "backend") != 0) {
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ALOGE("%s: Device %s has no backend set!",
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__func__, attr[1]);
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goto done;
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}
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if (attr[4] != NULL) {
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if (strcmp(attr[4], "interface") != 0) {
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hw_interface = NULL;
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} else {
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hw_interface = (char *)attr[5];
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}
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}
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if (platform_set_snd_device_backend(index, attr[3], hw_interface) < 0) {
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ALOGE("%s: Device %s backend %s was not set!",
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__func__, attr[1], attr[3]);
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goto done;
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}
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done:
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return;
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}
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static void process_acdb_id(const XML_Char **attr)
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{
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int index;
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if (strcmp(attr[0], "name") != 0) {
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ALOGE("%s: 'name' not found, no ACDB ID set!", __func__);
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goto done;
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}
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index = platform_get_snd_device_index((char *)attr[1]);
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if (index < 0) {
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ALOGE("%s: Device %s in platform info xml not found, no ACDB ID set!",
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__func__, attr[1]);
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goto done;
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}
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if (strcmp(attr[2], "acdb_id") != 0) {
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ALOGE("%s: Device %s in platform info xml has no acdb_id, no ACDB ID set!",
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__func__, attr[1]);
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goto done;
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}
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if (platform_set_snd_device_acdb_id(index, atoi((char *)attr[3])) < 0) {
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ALOGE("%s: Device %s, ACDB ID %d was not set!",
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__func__, attr[1], atoi((char *)attr[3]));
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goto done;
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}
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done:
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return;
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}
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static void process_bit_width(const XML_Char **attr)
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{
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int index;
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if (strcmp(attr[0], "name") != 0) {
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ALOGE("%s: 'name' not found, no ACDB ID set!", __func__);
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goto done;
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}
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index = platform_get_snd_device_index((char *)attr[1]);
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if (index < 0) {
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ALOGE("%s: Device %s in platform info xml not found, no ACDB ID set!",
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__func__, attr[1]);
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goto done;
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}
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if (strcmp(attr[2], "bit_width") != 0) {
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ALOGE("%s: Device %s in platform info xml has no bit_width, no ACDB ID set!",
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__func__, attr[1]);
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goto done;
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}
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if (platform_set_snd_device_bit_width(index, atoi((char *)attr[3])) < 0) {
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ALOGE("%s: Device %s, ACDB ID %d was not set!",
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__func__, attr[1], atoi((char *)attr[3]));
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goto done;
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}
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done:
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return;
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}
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static void process_interface_name(const XML_Char **attr)
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{
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int ret;
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if (strcmp(attr[0], "name") != 0) {
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ALOGE("%s: 'name' not found, no Audio Interface set!", __func__);
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goto done;
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}
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if (strcmp(attr[2], "interface") != 0) {
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ALOGE("%s: Device %s has no Audio Interface set!",
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__func__, attr[1]);
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goto done;
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}
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if (strcmp(attr[4], "codec_type") != 0) {
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ALOGE("%s: Device %s has no codec type set!",
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__func__, attr[1]);
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goto done;
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}
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ret = platform_set_audio_device_interface((char *)attr[1], (char *)attr[3],
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(char *)attr[5]);
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if (ret < 0) {
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ALOGE("%s: Audio Interface not set!", __func__);
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goto done;
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}
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done:
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return;
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}
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static void process_config_params(const XML_Char **attr)
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{
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if (strcmp(attr[0], "key") != 0) {
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ALOGE("%s: 'key' not found", __func__);
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goto done;
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}
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if (strcmp(attr[2], "value") != 0) {
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ALOGE("%s: 'value' not found", __func__);
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goto done;
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}
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str_parms_add_str(my_data.kvpairs, (char*)attr[1], (char*)attr[3]);
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done:
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return;
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}
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static void start_tag(void *userdata __unused, const XML_Char *tag_name,
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const XML_Char **attr)
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{
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if (strcmp(tag_name, "bit_width_configs") == 0) {
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section = BITWIDTH;
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} else if (strcmp(tag_name, "acdb_ids") == 0) {
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section = ACDB;
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} else if (strcmp(tag_name, "pcm_ids") == 0) {
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section = PCM_ID;
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} else if (strcmp(tag_name, "backend_names") == 0) {
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section = BACKEND_NAME;
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} else if (strcmp(tag_name, "config_params") == 0) {
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section = CONFIG_PARAMS;
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} else if (strcmp(tag_name, "interface_names") == 0) {
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section = INTERFACE_NAME;
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} else if (strcmp(tag_name, "device") == 0) {
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if ((section != ACDB) && (section != BACKEND_NAME) && (section != BITWIDTH) &&
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(section != INTERFACE_NAME)) {
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ALOGE("device tag only supported for acdb/backend names/bitwitdh/interface names");
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return;
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}
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/* call into process function for the current section */
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section_process_fn fn = section_table[section];
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fn(attr);
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} else if (strcmp(tag_name, "usecase") == 0) {
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if (section != PCM_ID) {
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ALOGE("usecase tag only supported with PCM_ID section");
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return;
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}
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section_process_fn fn = section_table[PCM_ID];
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fn(attr);
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} else if (strcmp(tag_name, "param") == 0) {
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if (section != CONFIG_PARAMS) {
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ALOGE("param tag only supported with CONFIG_PARAMS section");
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return;
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}
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section_process_fn fn = section_table[section];
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fn(attr);
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}
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return;
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}
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static void end_tag(void *userdata __unused, const XML_Char *tag_name)
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{
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if (strcmp(tag_name, "bit_width_configs") == 0) {
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section = ROOT;
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} else if (strcmp(tag_name, "acdb_ids") == 0) {
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section = ROOT;
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} else if (strcmp(tag_name, "pcm_ids") == 0) {
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section = ROOT;
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} else if (strcmp(tag_name, "backend_names") == 0) {
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section = ROOT;
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} else if (strcmp(tag_name, "config_params") == 0) {
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section = ROOT;
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platform_set_parameters(my_data.platform, my_data.kvpairs);
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} else if (strcmp(tag_name, "interface_names") == 0) {
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section = ROOT;
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}
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}
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int platform_info_init(const char *filename, void *platform)
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{
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XML_Parser parser;
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FILE *file;
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int ret = 0;
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int bytes_read;
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void *buf;
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file = fopen(filename, "r");
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section = ROOT;
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if (!file) {
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ALOGD("%s: Failed to open %s, using defaults.",
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__func__, filename);
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ret = -ENODEV;
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goto done;
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}
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parser = XML_ParserCreate(NULL);
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if (!parser) {
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ALOGE("%s: Failed to create XML parser!", __func__);
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ret = -ENODEV;
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goto err_close_file;
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}
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my_data.platform = platform;
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my_data.kvpairs = str_parms_create();
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XML_SetElementHandler(parser, start_tag, end_tag);
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while (1) {
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buf = XML_GetBuffer(parser, BUF_SIZE);
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if (buf == NULL) {
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ALOGE("%s: XML_GetBuffer failed", __func__);
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ret = -ENOMEM;
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goto err_free_parser;
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}
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bytes_read = fread(buf, 1, BUF_SIZE, file);
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if (bytes_read < 0) {
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ALOGE("%s: fread failed, bytes read = %d", __func__, bytes_read);
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ret = bytes_read;
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goto err_free_parser;
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}
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if (XML_ParseBuffer(parser, bytes_read,
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bytes_read == 0) == XML_STATUS_ERROR) {
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ALOGE("%s: XML_ParseBuffer failed, for %s",
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__func__, filename);
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ret = -EINVAL;
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goto err_free_parser;
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}
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if (bytes_read == 0)
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break;
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}
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err_free_parser:
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XML_ParserFree(parser);
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err_close_file:
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fclose(file);
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done:
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return ret;
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}
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