blob: 7b236b4f04890ecaf5e8cf5fc104aeb0b2090b65 [file] [log] [blame]
/* Copyright (c) 2012-2017, The Linux Foundation. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 and
* only version 2 as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#include <linux/init.h>
#include <linux/err.h>
#include <linux/module.h>
#include <linux/time.h>
#include <linux/wait.h>
#include <linux/platform_device.h>
#include <linux/slab.h>
#include <linux/dma-mapping.h>
#include <sound/core.h>
#include <sound/soc.h>
#include <sound/soc-dapm.h>
#include <sound/pcm.h>
#include <sound/initval.h>
#include <sound/control.h>
#include <asm/dma.h>
#include <linux/of_device.h>
#include <dsp/q6voice.h>
#include "msm-pcm-voice-v2.h"
static struct msm_voice voice_info[VOICE_SESSION_INDEX_MAX];
static struct snd_pcm_hardware msm_pcm_hardware = {
.info = (SNDRV_PCM_INFO_INTERLEAVED |
SNDRV_PCM_INFO_PAUSE |
SNDRV_PCM_INFO_RESUME),
.formats = SNDRV_PCM_FMTBIT_S16_LE,
.rates = SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_16000,
.rate_min = 8000,
.rate_max = 16000,
.channels_min = 1,
.channels_max = 1,
.buffer_bytes_max = 4096 * 2,
.period_bytes_min = 2048,
.period_bytes_max = 4096,
.periods_min = 2,
.periods_max = 4,
.fifo_size = 0,
};
static bool is_volte(struct msm_voice *pvolte)
{
if (pvolte == &voice_info[VOLTE_SESSION_INDEX])
return true;
else
return false;
}
static bool is_voice2(struct msm_voice *pvoice2)
{
if (pvoice2 == &voice_info[VOICE2_SESSION_INDEX])
return true;
else
return false;
}
static bool is_qchat(struct msm_voice *pqchat)
{
if (pqchat == &voice_info[QCHAT_SESSION_INDEX])
return true;
else
return false;
}
static bool is_vowlan(struct msm_voice *pvowlan)
{
if (pvowlan == &voice_info[VOWLAN_SESSION_INDEX])
return true;
else
return false;
}
static bool is_voicemmode1(struct msm_voice *pvoicemmode1)
{
if (pvoicemmode1 == &voice_info[VOICEMMODE1_INDEX])
return true;
else
return false;
}
static bool is_voicemmode2(struct msm_voice *pvoicemmode2)
{
if (pvoicemmode2 == &voice_info[VOICEMMODE2_INDEX])
return true;
else
return false;
}
static uint32_t get_session_id(struct msm_voice *pvoc)
{
uint32_t session_id = 0;
if (is_volte(pvoc))
session_id = voc_get_session_id(VOLTE_SESSION_NAME);
else if (is_voice2(pvoc))
session_id = voc_get_session_id(VOICE2_SESSION_NAME);
else if (is_qchat(pvoc))
session_id = voc_get_session_id(QCHAT_SESSION_NAME);
else if (is_vowlan(pvoc))
session_id = voc_get_session_id(VOWLAN_SESSION_NAME);
else if (is_voicemmode1(pvoc))
session_id = voc_get_session_id(VOICEMMODE1_NAME);
else if (is_voicemmode2(pvoc))
session_id = voc_get_session_id(VOICEMMODE2_NAME);
else
session_id = voc_get_session_id(VOICE_SESSION_NAME);
return session_id;
}
static int msm_pcm_playback_prepare(struct snd_pcm_substream *substream)
{
struct snd_pcm_runtime *runtime = substream->runtime;
struct msm_voice *prtd = runtime->private_data;
pr_debug("%s\n", __func__);
if (!prtd->playback_start)
prtd->playback_start = 1;
return 0;
}
static int msm_pcm_capture_prepare(struct snd_pcm_substream *substream)
{
struct snd_pcm_runtime *runtime = substream->runtime;
struct msm_voice *prtd = runtime->private_data;
pr_debug("%s\n", __func__);
if (!prtd->capture_start)
prtd->capture_start = 1;
return 0;
}
static int msm_pcm_open(struct snd_pcm_substream *substream)
{
struct snd_pcm_runtime *runtime = substream->runtime;
struct msm_voice *voice;
if (!strncmp("VoLTE", substream->pcm->id, 5)) {
voice = &voice_info[VOLTE_SESSION_INDEX];
pr_debug("%s: Open VoLTE Substream Id=%s\n",
__func__, substream->pcm->id);
} else if (!strncmp("Voice2", substream->pcm->id, 6)) {
voice = &voice_info[VOICE2_SESSION_INDEX];
pr_debug("%s: Open Voice2 Substream Id=%s\n",
__func__, substream->pcm->id);
} else if (!strncmp("QCHAT", substream->pcm->id, 5)) {
voice = &voice_info[QCHAT_SESSION_INDEX];
pr_debug("%s: Open QCHAT Substream Id=%s\n",
__func__, substream->pcm->id);
} else if (!strncmp("VoWLAN", substream->pcm->id, 6)) {
voice = &voice_info[VOWLAN_SESSION_INDEX];
pr_debug("%s: Open VoWLAN Substream Id=%s\n",
__func__, substream->pcm->id);
} else if (!strncmp("VoiceMMode1", substream->pcm->id, 11)) {
voice = &voice_info[VOICEMMODE1_INDEX];
pr_debug("%s: Open VoiceMMode1 Substream Id=%s\n",
__func__, substream->pcm->id);
} else if (!strncmp("VoiceMMode2", substream->pcm->id, 11)) {
voice = &voice_info[VOICEMMODE2_INDEX];
pr_debug("%s: Open VoiceMMode2 Substream Id=%s\n",
__func__, substream->pcm->id);
} else {
voice = &voice_info[VOICE_SESSION_INDEX];
pr_debug("%s: Open VOICE Substream Id=%s\n",
__func__, substream->pcm->id);
}
mutex_lock(&voice->lock);
runtime->hw = msm_pcm_hardware;
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
voice->playback_substream = substream;
else if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
voice->capture_substream = substream;
voice->instance++;
pr_debug("%s: Instance = %d, Stream ID = %s\n",
__func__, voice->instance, substream->pcm->id);
runtime->private_data = voice;
mutex_unlock(&voice->lock);
return 0;
}
static int msm_pcm_playback_close(struct snd_pcm_substream *substream)
{
struct snd_pcm_runtime *runtime = substream->runtime;
struct msm_voice *prtd = runtime->private_data;
pr_debug("%s\n", __func__);
if (prtd->playback_start)
prtd->playback_start = 0;
prtd->playback_substream = NULL;
return 0;
}
static int msm_pcm_capture_close(struct snd_pcm_substream *substream)
{
struct snd_pcm_runtime *runtime = substream->runtime;
struct msm_voice *prtd = runtime->private_data;
pr_debug("%s\n", __func__);
if (prtd->capture_start)
prtd->capture_start = 0;
prtd->capture_substream = NULL;
return 0;
}
static int msm_pcm_close(struct snd_pcm_substream *substream)
{
struct snd_pcm_runtime *runtime = substream->runtime;
struct msm_voice *prtd = runtime->private_data;
uint32_t session_id = 0;
int ret = 0;
mutex_lock(&prtd->lock);
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
ret = msm_pcm_playback_close(substream);
else if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
ret = msm_pcm_capture_close(substream);
prtd->instance--;
if (!prtd->playback_start && !prtd->capture_start) {
pr_debug("end voice call\n");
session_id = get_session_id(prtd);
if (session_id)
voc_end_voice_call(session_id);
}
mutex_unlock(&prtd->lock);
return ret;
}
static int msm_pcm_prepare(struct snd_pcm_substream *substream)
{
int ret = 0;
struct snd_pcm_runtime *runtime = substream->runtime;
struct msm_voice *prtd = runtime->private_data;
uint32_t session_id = 0;
mutex_lock(&prtd->lock);
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
ret = msm_pcm_playback_prepare(substream);
else if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
ret = msm_pcm_capture_prepare(substream);
if (prtd->playback_start && prtd->capture_start) {
session_id = get_session_id(prtd);
if (session_id)
voc_start_voice_call(session_id);
}
mutex_unlock(&prtd->lock);
return ret;
}
static int msm_pcm_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params)
{
pr_debug("%s: Voice\n", __func__);
snd_pcm_set_runtime_buffer(substream, &substream->dma_buffer);
return 0;
}
static int msm_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
{
int ret = 0;
struct snd_pcm_runtime *runtime = substream->runtime;
struct msm_voice *prtd = runtime->private_data;
uint32_t session_id = 0;
pr_debug("%s: cmd = %d\n", __func__, cmd);
session_id = get_session_id(prtd);
switch (cmd) {
case SNDRV_PCM_TRIGGER_START:
case SNDRV_PCM_TRIGGER_STOP:
pr_debug("Start & Stop Voice call not handled in Trigger.\n");
break;
case SNDRV_PCM_TRIGGER_RESUME:
case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
pr_debug("%s: resume call session_id = %d\n", __func__,
session_id);
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
ret = msm_pcm_playback_prepare(substream);
else if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
ret = msm_pcm_capture_prepare(substream);
if (prtd->playback_start && prtd->capture_start) {
if (session_id)
voc_resume_voice_call(session_id);
}
break;
case SNDRV_PCM_TRIGGER_SUSPEND:
case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
pr_debug("%s: pause call session_id=%d\n",
__func__, session_id);
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
if (prtd->playback_start)
prtd->playback_start = 0;
} else if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) {
if (prtd->capture_start)
prtd->capture_start = 0;
}
if (session_id)
voc_standby_voice_call(session_id);
break;
default:
ret = -EINVAL;
break;
}
return ret;
}
static int msm_pcm_ioctl(struct snd_pcm_substream *substream,
unsigned int cmd, void *arg)
{
struct snd_pcm_runtime *runtime = substream->runtime;
struct msm_voice *prtd = runtime->private_data;
uint32_t session_id = get_session_id(prtd);
enum voice_lch_mode lch_mode;
int ret = 0;
switch (cmd) {
case SNDRV_VOICE_IOCTL_LCH:
if (copy_from_user(&lch_mode, (void *)arg,
sizeof(enum voice_lch_mode))) {
pr_err("%s: Copy from user failed, size %zd\n",
__func__, sizeof(enum voice_lch_mode));
ret = -EFAULT;
break;
}
pr_debug("%s: %s lch_mode:%d\n",
__func__, substream->pcm->id, lch_mode);
switch (lch_mode) {
case VOICE_LCH_START:
case VOICE_LCH_STOP:
ret = voc_set_lch(session_id, lch_mode);
break;
default:
pr_err("%s: Invalid LCH MODE %d\n", __func__, lch_mode);
ret = -EFAULT;
}
break;
default:
pr_debug("%s: Falling into default snd_lib_ioctl cmd 0x%x\n",
__func__, cmd);
ret = snd_pcm_lib_ioctl(substream, cmd, arg);
break;
}
if (!ret)
pr_debug("%s: ret %d\n", __func__, ret);
else
pr_err("%s: cmd 0x%x failed %d\n", __func__, cmd, ret);
return ret;
}
static int msm_voice_sidetone_put(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
int ret;
long value = ucontrol->value.integer.value[0];
bool sidetone_enable = value;
uint32_t session_id = ALL_SESSION_VSID;
if (value < 0) {
pr_err("%s: Invalid arguments sidetone enable %ld\n",
__func__, value);
ret = -EINVAL;
return ret;
}
ret = voc_set_afe_sidetone(session_id, sidetone_enable);
pr_debug("%s: AFE Sidetone enable=%d session_id=0x%x ret=%d\n",
__func__, sidetone_enable, session_id, ret);
return ret;
}
static int msm_voice_sidetone_get(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
ucontrol->value.integer.value[0] = voc_get_afe_sidetone();
return 0;
}
static int msm_voice_gain_put(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
int ret = 0;
int volume = ucontrol->value.integer.value[0];
uint32_t session_id = ucontrol->value.integer.value[1];
int ramp_duration = ucontrol->value.integer.value[2];
if ((volume < 0) || (ramp_duration < 0)
|| (ramp_duration > MAX_RAMP_DURATION)) {
pr_err(" %s Invalid arguments", __func__);
ret = -EINVAL;
goto done;
}
pr_debug("%s: volume: %d session_id: %#x ramp_duration: %d\n", __func__,
volume, session_id, ramp_duration);
voc_set_rx_vol_step(session_id, RX_PATH, volume, ramp_duration);
done:
return ret;
}
static int msm_voice_mute_put(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
int ret = 0;
int mute = ucontrol->value.integer.value[0];
uint32_t session_id = ucontrol->value.integer.value[1];
int ramp_duration = ucontrol->value.integer.value[2];
if ((mute < 0) || (mute > 1) || (ramp_duration < 0)
|| (ramp_duration > MAX_RAMP_DURATION)) {
pr_err(" %s Invalid arguments", __func__);
ret = -EINVAL;
goto done;
}
pr_debug("%s: mute=%d session_id=%#x ramp_duration=%d\n", __func__,
mute, session_id, ramp_duration);
ret = voc_set_tx_mute(session_id, TX_PATH, mute, ramp_duration);
done:
return ret;
}
static int msm_voice_tx_device_mute_put(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
int ret = 0;
int mute = ucontrol->value.integer.value[0];
uint32_t session_id = ucontrol->value.integer.value[1];
int ramp_duration = ucontrol->value.integer.value[2];
if ((mute < 0) || (mute > 1) || (ramp_duration < 0) ||
(ramp_duration > MAX_RAMP_DURATION)) {
pr_err(" %s Invalid arguments", __func__);
ret = -EINVAL;
goto done;
}
pr_debug("%s: mute=%d session_id=%#x ramp_duration=%d\n", __func__,
mute, session_id, ramp_duration);
ret = voc_set_device_mute(session_id, VSS_IVOLUME_DIRECTION_TX,
mute, ramp_duration);
done:
return ret;
}
static int msm_voice_rx_device_mute_put(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
int ret = 0;
int mute = ucontrol->value.integer.value[0];
uint32_t session_id = ucontrol->value.integer.value[1];
int ramp_duration = ucontrol->value.integer.value[2];
if ((mute < 0) || (mute > 1) || (ramp_duration < 0) ||
(ramp_duration > MAX_RAMP_DURATION)) {
pr_err(" %s Invalid arguments", __func__);
ret = -EINVAL;
goto done;
}
pr_debug("%s: mute=%d session_id=%#x ramp_duration=%d\n", __func__,
mute, session_id, ramp_duration);
voc_set_device_mute(session_id, VSS_IVOLUME_DIRECTION_RX,
mute, ramp_duration);
done:
return ret;
}
static const char * const tty_mode[] = {"OFF", "HCO", "VCO", "FULL"};
static const struct soc_enum msm_tty_mode_enum[] = {
SOC_ENUM_SINGLE_EXT(4, tty_mode),
};
static int msm_voice_tty_mode_get(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
ucontrol->value.integer.value[0] =
voc_get_tty_mode(voc_get_session_id(VOICE_SESSION_NAME));
return 0;
}
static int msm_voice_tty_mode_put(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
int tty_mode = ucontrol->value.integer.value[0];
pr_debug("%s: tty_mode=%d\n", __func__, tty_mode);
voc_set_tty_mode(voc_get_session_id(VOICE_SESSION_NAME), tty_mode);
voc_set_tty_mode(voc_get_session_id(VOICE2_SESSION_NAME), tty_mode);
voc_set_tty_mode(voc_get_session_id(VOLTE_SESSION_NAME), tty_mode);
voc_set_tty_mode(voc_get_session_id(VOWLAN_SESSION_NAME), tty_mode);
voc_set_tty_mode(voc_get_session_id(VOICEMMODE1_NAME), tty_mode);
voc_set_tty_mode(voc_get_session_id(VOICEMMODE2_NAME), tty_mode);
return 0;
}
static int msm_voice_slowtalk_put(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
int st_enable = ucontrol->value.integer.value[0];
uint32_t session_id = ucontrol->value.integer.value[1];
pr_debug("%s: st enable=%d session_id=%#x\n", __func__, st_enable,
session_id);
voc_set_pp_enable(session_id,
MODULE_ID_VOICE_MODULE_ST, st_enable);
return 0;
}
static int msm_voice_hd_voice_put(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
int ret = 0;
uint32_t hd_enable = ucontrol->value.integer.value[0];
uint32_t session_id = ucontrol->value.integer.value[1];
pr_debug("%s: HD Voice enable=%d session_id=%#x\n", __func__, hd_enable,
session_id);
ret = voc_set_hd_enable(session_id, hd_enable);
return ret;
}
static int msm_voice_topology_disable_put(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
int ret = 0;
int disable = ucontrol->value.integer.value[0];
uint32_t session_id = ucontrol->value.integer.value[1];
if ((disable < 0) || (disable > 1)) {
pr_err(" %s Invalid arguments: %d\n", __func__, disable);
ret = -EINVAL;
goto done;
}
pr_debug("%s: disable = %d, session_id = %d\n", __func__, disable,
session_id);
ret = voc_disable_topology(session_id, disable);
done:
return ret;
}
static int msm_voice_cvd_version_info(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_info *uinfo)
{
int ret = 0;
pr_debug("%s:\n", __func__);
uinfo->type = SNDRV_CTL_ELEM_TYPE_BYTES;
uinfo->count = CVD_VERSION_STRING_MAX_SIZE;
return ret;
}
static int msm_voice_cvd_version_get(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
char cvd_version[CVD_VERSION_STRING_MAX_SIZE] = CVD_VERSION_DEFAULT;
int ret;
pr_debug("%s:\n", __func__);
ret = voc_get_cvd_version(cvd_version);
if (ret)
pr_err("%s: Error retrieving CVD version, error:%d\n",
__func__, ret);
memcpy(ucontrol->value.bytes.data, cvd_version, sizeof(cvd_version));
return 0;
}
static struct snd_kcontrol_new msm_voice_controls[] = {
SOC_SINGLE_MULTI_EXT("Voice Rx Device Mute", SND_SOC_NOPM, 0, VSID_MAX,
0, 3, NULL, msm_voice_rx_device_mute_put),
SOC_SINGLE_MULTI_EXT("Voice Tx Device Mute", SND_SOC_NOPM, 0, VSID_MAX,
0, 3, NULL, msm_voice_tx_device_mute_put),
SOC_SINGLE_MULTI_EXT("Voice Tx Mute", SND_SOC_NOPM, 0, VSID_MAX,
0, 3, NULL, msm_voice_mute_put),
SOC_SINGLE_MULTI_EXT("Voice Rx Gain", SND_SOC_NOPM, 0, VSID_MAX, 0, 3,
NULL, msm_voice_gain_put),
SOC_ENUM_EXT("TTY Mode", msm_tty_mode_enum[0], msm_voice_tty_mode_get,
msm_voice_tty_mode_put),
SOC_SINGLE_MULTI_EXT("Slowtalk Enable", SND_SOC_NOPM, 0, VSID_MAX, 0, 2,
NULL, msm_voice_slowtalk_put),
SOC_SINGLE_MULTI_EXT("Voice Topology Disable", SND_SOC_NOPM, 0,
VSID_MAX, 0, 2, NULL,
msm_voice_topology_disable_put),
SOC_SINGLE_MULTI_EXT("HD Voice Enable", SND_SOC_NOPM, 0, VSID_MAX, 0, 2,
NULL, msm_voice_hd_voice_put),
{
.access = SNDRV_CTL_ELEM_ACCESS_READ,
.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
.name = "CVD Version",
.info = msm_voice_cvd_version_info,
.get = msm_voice_cvd_version_get,
},
SOC_SINGLE_MULTI_EXT("Voice Sidetone Enable", SND_SOC_NOPM, 0, 1, 0, 1,
msm_voice_sidetone_get, msm_voice_sidetone_put),
};
static const struct snd_pcm_ops msm_pcm_ops = {
.open = msm_pcm_open,
.hw_params = msm_pcm_hw_params,
.close = msm_pcm_close,
.prepare = msm_pcm_prepare,
.trigger = msm_pcm_trigger,
.ioctl = msm_pcm_ioctl,
.compat_ioctl = msm_pcm_ioctl,
};
static int msm_asoc_pcm_new(struct snd_soc_pcm_runtime *rtd)
{
struct snd_card *card = rtd->card->snd_card;
int ret = 0;
if (!card->dev->coherent_dma_mask)
card->dev->coherent_dma_mask = DMA_BIT_MASK(32);
return ret;
}
static int msm_pcm_voice_probe(struct snd_soc_platform *platform)
{
snd_soc_add_platform_controls(platform, msm_voice_controls,
ARRAY_SIZE(msm_voice_controls));
return 0;
}
static struct snd_soc_platform_driver msm_soc_platform = {
.ops = &msm_pcm_ops,
.pcm_new = msm_asoc_pcm_new,
.probe = msm_pcm_voice_probe,
};
static int msm_pcm_probe(struct platform_device *pdev)
{
int rc;
bool destroy_cvd = false;
const char *is_destroy_cvd = "qcom,destroy-cvd";
if (!is_voc_initialized()) {
pr_debug("%s: voice module not initialized yet, deferring probe()\n",
__func__);
rc = -EPROBE_DEFER;
goto done;
}
rc = voc_alloc_cal_shared_memory();
if (rc == -EPROBE_DEFER) {
pr_debug("%s: memory allocation for calibration deferred %d\n",
__func__, rc);
goto done;
} else if (rc < 0) {
pr_err("%s: memory allocation for calibration failed %d\n",
__func__, rc);
}
pr_debug("%s: dev name %s\n",
__func__, dev_name(&pdev->dev));
destroy_cvd = of_property_read_bool(pdev->dev.of_node,
is_destroy_cvd);
voc_set_destroy_cvd_flag(destroy_cvd);
rc = snd_soc_register_platform(&pdev->dev,
&msm_soc_platform);
done:
return rc;
}
static int msm_pcm_remove(struct platform_device *pdev)
{
snd_soc_unregister_platform(&pdev->dev);
return 0;
}
static const struct of_device_id msm_voice_dt_match[] = {
{.compatible = "qcom,msm-pcm-voice"},
{}
};
MODULE_DEVICE_TABLE(of, msm_voice_dt_match);
static struct platform_driver msm_pcm_driver = {
.driver = {
.name = "msm-pcm-voice",
.owner = THIS_MODULE,
.of_match_table = msm_voice_dt_match,
},
.probe = msm_pcm_probe,
.remove = msm_pcm_remove,
};
int __init msm_pcm_voice_init(void)
{
int i = 0;
memset(&voice_info, 0, sizeof(voice_info));
for (i = 0; i < VOICE_SESSION_INDEX_MAX; i++)
mutex_init(&voice_info[i].lock);
return platform_driver_register(&msm_pcm_driver);
}
void __exit msm_pcm_voice_exit(void)
{
platform_driver_unregister(&msm_pcm_driver);
}
MODULE_DESCRIPTION("Voice PCM module platform driver");
MODULE_LICENSE("GPL v2");