/*
* Copyright (C) 2014 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#define LOG_TAG "platform_info"
#define LOG_NDDEBUG 0
#include <errno.h>
#include <stdio.h>
#include <expat.h>
#include <cutils/log.h>
#include <audio_hw.h>
#include "platform_api.h"
#include <platform.h>
#include <math.h>
typedef enum {
ROOT,
ACDB,
PCM_ID,
BACKEND_NAME,
CONFIG_PARAMS,
OPERATOR_SPECIFIC,
GAIN_LEVEL_MAPPING,
} section_t;
typedef void (* section_process_fn)(const XML_Char **attr);
static void process_acdb_id(const XML_Char **attr);
static void process_pcm_id(const XML_Char **attr);
static void process_backend_name(const XML_Char **attr);
static void process_config_params(const XML_Char **attr);
static void process_root(const XML_Char **attr);
static void process_operator_specific(const XML_Char **attr);
static void process_gain_db_to_level_map(const XML_Char **attr);
static section_process_fn section_table[] = {
[ROOT] = process_root,
[ACDB] = process_acdb_id,
[PCM_ID] = process_pcm_id,
[BACKEND_NAME] = process_backend_name,
[CONFIG_PARAMS] = process_config_params,
[OPERATOR_SPECIFIC] = process_operator_specific,
[GAIN_LEVEL_MAPPING] = process_gain_db_to_level_map,
};
static section_t section;
struct platform_info {
void *platform;
struct str_parms *kvpairs;
};
static struct platform_info my_data;
/*
* <audio_platform_info>
* <acdb_ids>
* <device name="???" acdb_id="???"/>
* ...
* ...
* </acdb_ids>
* <backend_names>
* <device name="???" backend="???"/>
* ...
* ...
* </backend_names>
* <pcm_ids>
* <usecase name="???" type="in/out" id="???"/>
* ...
* ...
* </pcm_ids>
* <config_params>
* <param key="snd_card_name" value="msm8994-tomtom-mtp-snd-card"/>
* <param key="operator_info" value="tmus;aa;bb;cc"/>
* <param key="operator_info" value="sprint;xx;yy;zz"/>
* ...
* ...
* </config_params>
*
* <operator_specific>
* <device name="???" operator="???" mixer_path="???" acdb_id="???"/>
* ...
* ...
* </operator_specific>
*
* </audio_platform_info>
*/
static void process_root(const XML_Char **attr __unused)
{
}
/* mapping from usecase to pcm dev id */
static void process_pcm_id(const XML_Char **attr)
{
int index;
if (strcmp(attr[0], "name") != 0) {
ALOGE("%s: 'name' not found, no pcm_id set!", __func__);
goto done;
}
index = platform_get_usecase_index((char *)attr[1]);
if (index < 0) {
ALOGE("%s: usecase %s in %s not found!",
__func__, attr[1], PLATFORM_INFO_XML_PATH);
goto done;
}
if (strcmp(attr[2], "type") != 0) {
ALOGE("%s: usecase type not mentioned", __func__);
goto done;
}
int type = -1;
if (!strcasecmp((char *)attr[3], "in")) {
type = 1;
} else if (!strcasecmp((char *)attr[3], "out")) {
type = 0;
} else {
ALOGE("%s: type must be IN or OUT", __func__);
goto done;
}
if (strcmp(attr[4], "id") != 0) {
ALOGE("%s: usecase id not mentioned", __func__);
goto done;
}
int id = atoi((char *)attr[5]);
if (platform_set_usecase_pcm_id(index, type, id) < 0) {
ALOGE("%s: usecase %s in %s, type %d id %d was not set!",
__func__, attr[1], PLATFORM_INFO_XML_PATH, type, id);
goto done;
}
done:
return;
}
/* backend to be used for a device */
static void process_backend_name(const XML_Char **attr)
{
int index;
char *hw_interface = NULL;
if (strcmp(attr[0], "name") != 0) {
ALOGE("%s: 'name' not found, no ACDB ID set!", __func__);
goto done;
}
index = platform_get_snd_device_index((char *)attr[1]);
if (index < 0) {
ALOGE("%s: Device %s in %s not found, no ACDB ID set!",
__func__, attr[1], PLATFORM_INFO_XML_PATH);
goto done;
}
if (strcmp(attr[2], "backend") != 0) {
ALOGE("%s: Device %s in %s has no backed set!",
__func__, attr[1], PLATFORM_INFO_XML_PATH);
goto done;
}
if (attr[4] != NULL) {
if (strcmp(attr[4], "interface") != 0) {
hw_interface = NULL;
} else {
hw_interface = (char *)attr[5];
}
}
if (platform_set_snd_device_backend(index, attr[3], hw_interface) < 0) {
ALOGE("%s: Device %s in %s, backend %s was not set!",
__func__, attr[1], PLATFORM_INFO_XML_PATH, attr[3]);
goto done;
}
done:
return;
}
static void process_gain_db_to_level_map(const XML_Char **attr)
{
struct amp_db_and_gain_table tbl_entry;
if ((strcmp(attr[0], "db") != 0) ||
(strcmp(attr[2], "level") != 0)) {
ALOGE("%s: invalid attribute passed %s %sexpected amp db level",
__func__, attr[0], attr[2]);
goto done;
}
tbl_entry.db = atof(attr[1]);
tbl_entry.amp = exp(tbl_entry.db * 0.115129f);
tbl_entry.level = atoi(attr[3]);
ALOGV("%s: amp [%f] db [%f] level [%d]", __func__,
tbl_entry.amp, tbl_entry.db, tbl_entry.level);
platform_add_gain_level_mapping(&tbl_entry);
done:
return;
}
static void process_acdb_id(const XML_Char **attr)
{
int index;
if (strcmp(attr[0], "name") != 0) {
ALOGE("%s: 'name' not found, no ACDB ID set!", __func__);
goto done;
}
index = platform_get_snd_device_index((char *)attr[1]);
if (index < 0) {
ALOGE("%s: Device %s in %s not found, no ACDB ID set!",
__func__, attr[1], PLATFORM_INFO_XML_PATH);
goto done;
}
if (strcmp(attr[2], "acdb_id") != 0) {
ALOGE("%s: Device %s in %s has no acdb_id, no ACDB ID set!",
__func__, attr[1], PLATFORM_INFO_XML_PATH);
goto done;
}
if (platform_set_snd_device_acdb_id(index, atoi((char *)attr[3])) < 0) {
ALOGE("%s: Device %s in %s, ACDB ID %d was not set!",
__func__, attr[1], PLATFORM_INFO_XML_PATH, atoi((char *)attr[3]));
goto done;
}
done:
return;
}
static void process_operator_specific(const XML_Char **attr)
{
snd_device_t snd_device = SND_DEVICE_NONE;
if (strcmp(attr[0], "name") != 0) {
ALOGE("%s: 'name' not found", __func__);
goto done;
}
snd_device = platform_get_snd_device_index((char *)attr[1]);
if (snd_device < 0) {
ALOGE("%s: Device %s in %s not found, no ACDB ID set!",
__func__, (char *)attr[3], PLATFORM_INFO_XML_PATH);
goto done;
}
if (strcmp(attr[2], "operator") != 0) {
ALOGE("%s: 'operator' not found", __func__);
goto done;
}
if (strcmp(attr[4], "mixer_path") != 0) {
ALOGE("%s: 'mixer_path' not found", __func__);
goto done;
}
if (strcmp(attr[6], "acdb_id") != 0) {
ALOGE("%s: 'acdb_id' not found", __func__);
goto done;
}
platform_add_operator_specific_device(snd_device, (char *)attr[3], (char *)attr[5], atoi((char *)attr[7]));
done:
return;
}
/* platform specific configuration key-value pairs */
static void process_config_params(const XML_Char **attr)
{
if (strcmp(attr[0], "key") != 0) {
ALOGE("%s: 'key' not found", __func__);
goto done;
}
if (strcmp(attr[2], "value") != 0) {
ALOGE("%s: 'value' not found", __func__);
goto done;
}
str_parms_add_str(my_data.kvpairs, (char*)attr[1], (char*)attr[3]);
platform_set_parameters(my_data.platform, my_data.kvpairs);
done:
return;
}
static void start_tag(void *userdata __unused, const XML_Char *tag_name,
const XML_Char **attr)
{
const XML_Char *attr_name = NULL;
const XML_Char *attr_value = NULL;
unsigned int i;
if (strcmp(tag_name, "acdb_ids") == 0) {
section = ACDB;
} else if (strcmp(tag_name, "pcm_ids") == 0) {
section = PCM_ID;
} else if (strcmp(tag_name, "backend_names") == 0) {
section = BACKEND_NAME;
} else if (strcmp(tag_name, "config_params") == 0) {
section = CONFIG_PARAMS;
} else if (strcmp(tag_name, "operator_specific") == 0) {
section = OPERATOR_SPECIFIC;
} else if (strcmp(tag_name, "gain_db_to_level_mapping") == 0) {
section = GAIN_LEVEL_MAPPING;
} else if (strcmp(tag_name, "device") == 0) {
if ((section != ACDB) && (section != BACKEND_NAME) && (section != OPERATOR_SPECIFIC)) {
ALOGE("device tag only supported for acdb/backend names");
return;
}
/* call into process function for the current section */
section_process_fn fn = section_table[section];
fn(attr);
} else if (strcmp(tag_name, "usecase") == 0) {
if (section != PCM_ID) {
ALOGE("usecase tag only supported with PCM_ID section");
return;
}
section_process_fn fn = section_table[PCM_ID];
fn(attr);
} else if (strcmp(tag_name, "param") == 0) {
if (section != CONFIG_PARAMS) {
ALOGE("param tag only supported with CONFIG_PARAMS section");
return;
}
section_process_fn fn = section_table[section];
fn(attr);
} else if (strcmp(tag_name, "gain_level_map") == 0) {
if (section != GAIN_LEVEL_MAPPING) {
ALOGE("usecase tag only supported with GAIN_LEVEL_MAPPING section");
return;
}
section_process_fn fn = section_table[GAIN_LEVEL_MAPPING];
fn(attr);
}
return;
}
static void end_tag(void *userdata __unused, const XML_Char *tag_name)
{
if (strcmp(tag_name, "acdb_ids") == 0) {
section = ROOT;
} else if (strcmp(tag_name, "pcm_ids") == 0) {
section = ROOT;
} else if (strcmp(tag_name, "backend_names") == 0) {
section = ROOT;
} else if (strcmp(tag_name, "config_params") == 0) {
section = ROOT;
} else if (strcmp(tag_name, "operator_specific") == 0) {
section = ROOT;
} else if (strcmp(tag_name, "gain_db_to_level_mapping") == 0) {
section = ROOT;
}
}
int platform_info_init(const char *filename, void *platform)
{
XML_Parser parser;
FILE *file;
int ret = 0;
int bytes_read;
void *buf;
static const uint32_t kBufSize = 1024;
char platform_info_file_name[MIXER_PATH_MAX_LENGTH]= {0};
section = ROOT;
if (filename == NULL) {
strlcpy(platform_info_file_name, PLATFORM_INFO_XML_PATH, MIXER_PATH_MAX_LENGTH);
} else {
strlcpy(platform_info_file_name, filename, MIXER_PATH_MAX_LENGTH);
}
ALOGV("%s: platform info file name is %s", __func__, platform_info_file_name);
file = fopen(platform_info_file_name, "r");
if (!file) {
ALOGD("%s: Failed to open %s, using defaults.",
__func__, platform_info_file_name);
ret = -ENODEV;
goto done;
}
parser = XML_ParserCreate(NULL);
if (!parser) {
ALOGE("%s: Failed to create XML parser!", __func__);
ret = -ENODEV;
goto err_close_file;
}
my_data.platform = platform;
my_data.kvpairs = str_parms_create();
XML_SetElementHandler(parser, start_tag, end_tag);
while (1) {
buf = XML_GetBuffer(parser, kBufSize);
if (buf == NULL) {
ALOGE("%s: XML_GetBuffer failed", __func__);
ret = -ENOMEM;
goto err_free_parser;
}
bytes_read = fread(buf, 1, kBufSize, file);
if (bytes_read < 0) {
ALOGE("%s: fread failed, bytes read = %d", __func__, bytes_read);
ret = bytes_read;
goto err_free_parser;
}
if (XML_ParseBuffer(parser, bytes_read,
bytes_read == 0) == XML_STATUS_ERROR) {
ALOGE("%s: XML_ParseBuffer failed, for %s",
__func__, platform_info_file_name);
ret = -EINVAL;
goto err_free_parser;
}
if (bytes_read == 0)
break;
}
err_free_parser:
XML_ParserFree(parser);
err_close_file:
fclose(file);
done:
return ret;
}