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btfmcodec: Create btfmcodec driver

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This changes handles below.

1. Create btfm codec driver.
2. add support to enumerate char device.
3. create hardware endpoint abstract layers.
4. Register with ALSA driver

CRs-Fixed: 3298745
Change-Id: Id75dad16de8414b3b6a24d265c8acb54eca4d5dc
This commit is contained in:
Balakrishna Godavarthi
2022-04-20 12:27:37 +05:30
parent d261d4757e
commit d22c687077
14 changed files with 1287 additions and 1 deletions
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99
btfmcodec/btfm_codec_hw_interface.c Normal file
View File

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// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (c) 2023 Qualcomm Innovation Center, Inc. All rights reserved.
*/
#include "btfm_codec.h"
#include "btfm_codec_hw_interface.h"
#include "btfm_codec_interface.h"
struct mutex hwep_drv_lock;
int btfmcodec_register_hw_ep (struct hwep_data *ep_info)
{
struct btfmcodec_data *btfmcodec;
struct hwep_data *hwep_info;
int ret = 0;
// ToDo Check wether we need mutex_init api
mutex_lock(&hwep_drv_lock);
btfmcodec = btfm_get_btfmcodec();
if (!btfmcodec) {
BTFMCODEC_ERR("btfm codec driver it not initialized");
ret = -EPERM;
goto end;
}
if (ep_info->num_dai == 0) {
BTFMCODEC_ERR("no active information provided by hw ep interface");
ret = -EPERM;
goto end;
}
hwep_info = btfmcodec->hwep_info;
if (hwep_info) {
BTFMCODEC_ERR("driver already holds hardware endpoint info");
ret = -EPERM;
goto end;
}
hwep_info = kzalloc(sizeof(struct hwep_data), GFP_KERNEL);
if (!hwep_info) {
BTFMCODEC_ERR("%s: failed to allocate memory\n", __func__);
ret = -ENOMEM;
goto end;
}
btfmcodec->hwep_info = hwep_info;
memcpy(hwep_info, ep_info, sizeof(struct hwep_data));
BTFMCODEC_INFO("Below driver registered with btfm codec\n");
BTFMCODEC_INFO("Driver name: %s\n", hwep_info->driver_name);
BTFMCODEC_INFO("Num of dai: %d supported", hwep_info->num_dai);
BTFMCODEC_INFO("Master config enabled: %u\n", test_bit(BTADV_AUDIO_MASTER_CONFIG,
&hwep_info->flags));
ret = btfm_register_codec(hwep_info);
end:
mutex_unlock(&hwep_drv_lock);
return ret;
}
int btfmcodec_unregister_hw_ep (char *driver_name)
{
struct btfmcodec_data *btfmcodec;
struct hwep_data *hwep_info;
int ret;
mutex_lock(&hwep_drv_lock);
btfmcodec = btfm_get_btfmcodec();
if (!btfmcodec) {
BTFMCODEC_ERR("btfm codec driver it not initialized");
ret = -EPERM;
goto end;
}
hwep_info = btfmcodec->hwep_info;
if (!hwep_info) {
BTFMCODEC_ERR("%s: no active hardware endpoint registered\n", __func__);
ret = -EPERM;
goto end;
}
if(!strncmp(hwep_info->driver_name, driver_name, DEVICE_NAME_MAX_LEN)) {
btfm_unregister_codec();
kfree(hwep_info);
BTFMCODEC_INFO("%s: deleted %s hardware endpoint\n", __func__, driver_name);
ret = -1;
goto end;
} else {
BTFMCODEC_ERR("%s: No hardware endpoint registered with %s\n", __func__, driver_name);
ret = -1;
goto end;
}
end:
mutex_unlock(&hwep_drv_lock);
return ret;
}
EXPORT_SYMBOL(btfmcodec_register_hw_ep);
EXPORT_SYMBOL(btfmcodec_unregister_hw_ep);