blob: 77dc81ce9c21bedd7823f8def2dc42ef1696c232 [file] [log] [blame]
/* Copyright (c) 2013-2014, 2017-2018 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/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/pcm.h>
#include <dsp/q6afe-v2.h>
#include <dsp/q6voice.h>
#include "msm-pcm-q6-v2.h"
#include "msm-pcm-routing-v2.h"
enum {
DTMF_IN_RX,
DTMF_IN_TX,
};
enum format {
FORMAT_S16_LE = 2
};
struct dtmf_det_info {
char session[MAX_SESSION_NAME_LEN];
uint8_t dir;
uint16_t high_freq;
uint16_t low_freq;
};
struct dtmf_buf_node {
struct list_head list;
struct dtmf_det_info dtmf_det_pkt;
};
enum dtmf_state {
DTMF_GEN_RX_STOPPED,
DTMF_GEN_RX_STARTED,
};
#define DTMF_MAX_Q_LEN 10
#define DTMF_PKT_SIZE sizeof(struct dtmf_det_info)
struct dtmf_drv_info {
enum dtmf_state state;
struct snd_pcm_substream *capture_substream;
struct list_head out_queue;
struct list_head free_out_queue;
wait_queue_head_t out_wait;
struct mutex lock;
spinlock_t dsp_lock;
uint8_t capture_start;
uint8_t capture_instance;
unsigned int pcm_capture_size;
unsigned int pcm_capture_count;
unsigned int pcm_capture_irq_pos;
unsigned int pcm_capture_buf_pos;
};
static struct snd_pcm_hardware msm_pcm_hardware = {
.info = (SNDRV_PCM_INFO_MMAP |
SNDRV_PCM_INFO_BLOCK_TRANSFER |
SNDRV_PCM_INFO_MMAP_VALID |
SNDRV_PCM_INFO_INTERLEAVED),
.formats = SNDRV_PCM_FMTBIT_S16_LE,
.channels_min = 1,
.channels_max = 1,
.buffer_bytes_max = (sizeof(struct dtmf_buf_node) * DTMF_MAX_Q_LEN),
.period_bytes_min = DTMF_PKT_SIZE,
.period_bytes_max = DTMF_PKT_SIZE,
.periods_min = DTMF_MAX_Q_LEN,
.periods_max = DTMF_MAX_Q_LEN,
.fifo_size = 0,
};
static int msm_dtmf_rx_generate_put(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
uint16_t low_freq = ucontrol->value.integer.value[0];
uint16_t high_freq = ucontrol->value.integer.value[1];
int64_t duration = ucontrol->value.integer.value[2];
uint16_t gain = ucontrol->value.integer.value[3];
pr_debug("%s: low_freq=%d high_freq=%d duration=%d gain=%d\n",
__func__, low_freq, high_freq, (int)duration, gain);
afe_dtmf_generate_rx(duration, high_freq, low_freq, gain);
return 0;
}
static int msm_dtmf_rx_generate_get(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
pr_debug("%s:\n", __func__);
ucontrol->value.integer.value[0] = 0;
return 0;
}
static int msm_dtmf_detect_voice_rx_put(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
int enable = ucontrol->value.integer.value[0];
pr_debug("%s: enable=%d\n", __func__, enable);
voc_enable_dtmf_rx_detection(voc_get_session_id(VOICE_SESSION_NAME),
enable);
return 0;
}
static int msm_dtmf_detect_voice_rx_get(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
ucontrol->value.integer.value[0] = 0;
return 0;
}
static int msm_dtmf_detect_volte_rx_put(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
int enable = ucontrol->value.integer.value[0];
pr_debug("%s: enable=%d\n", __func__, enable);
voc_enable_dtmf_rx_detection(voc_get_session_id(VOLTE_SESSION_NAME),
enable);
return 0;
}
static int msm_dtmf_detect_volte_rx_get(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
ucontrol->value.integer.value[0] = 0;
return 0;
}
static struct snd_kcontrol_new msm_dtmf_controls[] = {
SOC_SINGLE_MULTI_EXT("DTMF_Generate Rx Low High Duration Gain",
SND_SOC_NOPM, 0, 5000, 0, 4,
msm_dtmf_rx_generate_get,
msm_dtmf_rx_generate_put),
SOC_SINGLE_EXT("DTMF_Detect Rx Voice enable", SND_SOC_NOPM, 0, 1, 0,
msm_dtmf_detect_voice_rx_get,
msm_dtmf_detect_voice_rx_put),
SOC_SINGLE_EXT("DTMF_Detect Rx VoLTE enable", SND_SOC_NOPM, 0, 1, 0,
msm_dtmf_detect_volte_rx_get,
msm_dtmf_detect_volte_rx_put),
};
static int msm_pcm_dtmf_probe(struct snd_soc_platform *platform)
{
snd_soc_add_platform_controls(platform, msm_dtmf_controls,
ARRAY_SIZE(msm_dtmf_controls));
return 0;
}
static void dtmf_rx_detected_cb(uint8_t *pkt,
char *session,
void *private_data)
{
struct dtmf_buf_node *buf_node = NULL;
struct vss_istream_evt_rx_dtmf_detected *dtmf_det_pkt =
(struct vss_istream_evt_rx_dtmf_detected *)pkt;
struct dtmf_drv_info *prtd = private_data;
unsigned long dsp_flags;
pr_debug("%s\n", __func__);
if (prtd->capture_substream == NULL)
return;
/* Copy dtmf detected info into out_queue. */
spin_lock_irqsave(&prtd->dsp_lock, dsp_flags);
/* discarding dtmf detection info till start is received */
if (!list_empty(&prtd->free_out_queue) && prtd->capture_start) {
buf_node = list_first_entry(&prtd->free_out_queue,
struct dtmf_buf_node, list);
list_del(&buf_node->list);
buf_node->dtmf_det_pkt.high_freq = dtmf_det_pkt->high_freq;
buf_node->dtmf_det_pkt.low_freq = dtmf_det_pkt->low_freq;
if (session != NULL)
strlcpy(buf_node->dtmf_det_pkt.session,
session, MAX_SESSION_NAME_LEN);
buf_node->dtmf_det_pkt.dir = DTMF_IN_RX;
pr_debug("high =%d, low=%d session=%s\n",
buf_node->dtmf_det_pkt.high_freq,
buf_node->dtmf_det_pkt.low_freq,
buf_node->dtmf_det_pkt.session);
list_add_tail(&buf_node->list, &prtd->out_queue);
prtd->pcm_capture_irq_pos += prtd->pcm_capture_count;
spin_unlock_irqrestore(&prtd->dsp_lock, dsp_flags);
snd_pcm_period_elapsed(prtd->capture_substream);
} else {
spin_unlock_irqrestore(&prtd->dsp_lock, dsp_flags);
pr_err("DTMF detection pkt in Rx dropped, no free node available\n");
}
wake_up(&prtd->out_wait);
}
static int msm_pcm_capture_copy(struct snd_pcm_substream *substream,
int channel, unsigned long hwoff,
void __user *buf, unsigned long fbytes)
{
int ret = 0;
struct dtmf_buf_node *buf_node = NULL;
struct snd_pcm_runtime *runtime = substream->runtime;
struct dtmf_drv_info *prtd = runtime->private_data;
unsigned long dsp_flags;
ret = wait_event_interruptible_timeout(prtd->out_wait,
(!list_empty(&prtd->out_queue)),
1 * HZ);
if (ret > 0) {
if (fbytes <= DTMF_PKT_SIZE) {
spin_lock_irqsave(&prtd->dsp_lock, dsp_flags);
buf_node = list_first_entry(&prtd->out_queue,
struct dtmf_buf_node, list);
list_del(&buf_node->list);
spin_unlock_irqrestore(&prtd->dsp_lock, dsp_flags);
ret = copy_to_user(buf,
&buf_node->dtmf_det_pkt,
fbytes);
if (ret) {
pr_err("%s: Copy to user returned %d\n",
__func__, ret);
ret = -EFAULT;
}
spin_lock_irqsave(&prtd->dsp_lock, dsp_flags);
list_add_tail(&buf_node->list,
&prtd->free_out_queue);
spin_unlock_irqrestore(&prtd->dsp_lock, dsp_flags);
} else {
pr_err("%s: Read count %lu > DTMF_PKT_SIZE\n",
__func__, fbytes);
ret = -ENOMEM;
}
} else if (ret == 0) {
pr_err("%s: No UL data available\n", __func__);
ret = -ETIMEDOUT;
} else {
pr_err("%s: Read was interrupted\n", __func__);
ret = -ERESTARTSYS;
}
return ret;
}
static int msm_pcm_copy(struct snd_pcm_substream *substream, int a,
unsigned long hwoff, void __user *buf, unsigned long fbytes)
{
int ret = 0;
pr_debug("%s() DTMF\n", __func__);
if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
ret = msm_pcm_capture_copy(substream, a, hwoff, buf, fbytes);
return ret;
}
static int msm_pcm_open(struct snd_pcm_substream *substream)
{
struct snd_pcm_runtime *runtime = substream->runtime;
struct dtmf_drv_info *prtd = NULL;
int ret = 0;
if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) {
prtd = kzalloc(sizeof(struct dtmf_drv_info), GFP_KERNEL);
if (prtd == NULL) {
ret = -ENOMEM;
goto done;
}
mutex_init(&prtd->lock);
spin_lock_init(&prtd->dsp_lock);
init_waitqueue_head(&prtd->out_wait);
INIT_LIST_HEAD(&prtd->out_queue);
INIT_LIST_HEAD(&prtd->free_out_queue);
runtime->hw = msm_pcm_hardware;
ret = snd_pcm_hw_constraint_integer(runtime,
SNDRV_PCM_HW_PARAM_PERIODS);
if (ret < 0)
pr_info("snd_pcm_hw_constraint_integer failed\n");
prtd->capture_substream = substream;
prtd->capture_instance++;
runtime->private_data = prtd;
}
done:
return ret;
}
static int msm_pcm_close(struct snd_pcm_substream *substream)
{
int ret = 0;
struct list_head *ptr = NULL;
struct list_head *next = NULL;
struct dtmf_buf_node *buf_node = NULL;
struct snd_dma_buffer *c_dma_buf;
struct snd_pcm_substream *c_substream;
struct snd_pcm_runtime *runtime = substream->runtime;
struct dtmf_drv_info *prtd = runtime->private_data;
unsigned long dsp_flags;
pr_debug("%s() DTMF\n", __func__);
if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) {
mutex_lock(&prtd->lock);
wake_up(&prtd->out_wait);
if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
prtd->capture_instance--;
if (!prtd->capture_instance) {
if (prtd->state == DTMF_GEN_RX_STARTED) {
prtd->state = DTMF_GEN_RX_STOPPED;
voc_disable_dtmf_det_on_active_sessions();
voc_register_dtmf_rx_detection_cb(NULL, NULL);
}
/* release all buffer */
/* release out_queue and free_out_queue */
pr_debug("release all buffer\n");
c_substream = prtd->capture_substream;
if (c_substream == NULL) {
pr_debug("c_substream is NULL\n");
mutex_unlock(&prtd->lock);
return -EINVAL;
}
c_dma_buf = &c_substream->dma_buffer;
if (c_dma_buf == NULL) {
pr_debug("c_dma_buf is NULL.\n");
mutex_unlock(&prtd->lock);
return -EINVAL;
}
if (c_dma_buf->area != NULL) {
spin_lock_irqsave(&prtd->dsp_lock, dsp_flags);
list_for_each_safe(ptr, next,
&prtd->out_queue) {
buf_node = list_entry(ptr,
struct dtmf_buf_node, list);
list_del(&buf_node->list);
}
list_for_each_safe(ptr, next,
&prtd->free_out_queue) {
buf_node = list_entry(ptr,
struct dtmf_buf_node, list);
list_del(&buf_node->list);
}
spin_unlock_irqrestore(&prtd->dsp_lock,
dsp_flags);
dma_free_coherent(c_substream->pcm->card->dev,
runtime->hw.buffer_bytes_max,
c_dma_buf->area,
c_dma_buf->addr);
c_dma_buf->area = NULL;
}
}
prtd->capture_substream = NULL;
mutex_unlock(&prtd->lock);
}
return ret;
}
static int msm_pcm_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params)
{
struct snd_pcm_runtime *runtime = substream->runtime;
struct dtmf_drv_info *prtd = runtime->private_data;
struct snd_dma_buffer *dma_buf = &substream->dma_buffer;
struct dtmf_buf_node *buf_node = NULL;
int i = 0, offset = 0;
int ret = 0;
pr_debug("%s: DTMF\n", __func__);
if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) {
mutex_lock(&prtd->lock);
dma_buf->dev.type = SNDRV_DMA_TYPE_DEV;
dma_buf->dev.dev = substream->pcm->card->dev;
dma_buf->private_data = NULL;
dma_buf->area = dma_alloc_coherent(substream->pcm->card->dev,
runtime->hw.buffer_bytes_max,
&dma_buf->addr, GFP_KERNEL);
if (!dma_buf->area) {
pr_err("%s:MSM DTMF dma_alloc failed\n", __func__);
mutex_unlock(&prtd->lock);
return -ENOMEM;
}
dma_buf->bytes = runtime->hw.buffer_bytes_max;
memset(dma_buf->area, 0, runtime->hw.buffer_bytes_max);
for (i = 0; i < DTMF_MAX_Q_LEN; i++) {
pr_debug("node =%d\n", i);
buf_node = (void *) dma_buf->area + offset;
list_add_tail(&buf_node->list,
&prtd->free_out_queue);
offset = offset + sizeof(struct dtmf_buf_node);
}
snd_pcm_set_runtime_buffer(substream, &substream->dma_buffer);
mutex_unlock(&prtd->lock);
}
return ret;
}
static int msm_pcm_capture_prepare(struct snd_pcm_substream *substream)
{
struct snd_pcm_runtime *runtime = substream->runtime;
struct dtmf_drv_info *prtd = runtime->private_data;
pr_debug("%s: DTMF\n", __func__);
prtd->pcm_capture_size = snd_pcm_lib_buffer_bytes(substream);
prtd->pcm_capture_count = snd_pcm_lib_period_bytes(substream);
prtd->pcm_capture_irq_pos = 0;
prtd->pcm_capture_buf_pos = 0;
return 0;
}
static int msm_pcm_prepare(struct snd_pcm_substream *substream)
{
struct snd_pcm_runtime *runtime = substream->runtime;
struct dtmf_drv_info *prtd = runtime->private_data;
pr_debug("%s: DTMF\n", __func__);
if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) {
mutex_lock(&prtd->lock);
msm_pcm_capture_prepare(substream);
if (runtime->format != FORMAT_S16_LE) {
pr_err("format:%u doesn't match %d\n",
(uint32_t)runtime->format, FORMAT_S16_LE);
mutex_unlock(&prtd->lock);
return -EINVAL;
}
if (prtd->capture_instance &&
(prtd->state != DTMF_GEN_RX_STARTED)) {
voc_register_dtmf_rx_detection_cb(dtmf_rx_detected_cb,
prtd);
prtd->state = DTMF_GEN_RX_STARTED;
}
mutex_unlock(&prtd->lock);
}
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 dtmf_drv_info *prtd = runtime->private_data;
switch (cmd) {
case SNDRV_PCM_TRIGGER_START:
case SNDRV_PCM_TRIGGER_RESUME:
pr_debug("%s: Trigger start\n", __func__);
if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
prtd->capture_start = 1;
break;
case SNDRV_PCM_TRIGGER_STOP:
pr_debug("SNDRV_PCM_TRIGGER_STOP\n");
if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
prtd->capture_start = 0;
break;
default:
ret = -EINVAL;
break;
}
return ret;
}
static snd_pcm_uframes_t msm_pcm_pointer(struct snd_pcm_substream *substream)
{
snd_pcm_uframes_t ret = 0;
struct snd_pcm_runtime *runtime = substream->runtime;
struct dtmf_drv_info *prtd = runtime->private_data;
if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) {
if (prtd->pcm_capture_irq_pos >= prtd->pcm_capture_size)
prtd->pcm_capture_irq_pos = 0;
ret = bytes_to_frames(runtime, (prtd->pcm_capture_irq_pos));
}
return ret;
}
static const struct snd_pcm_ops msm_pcm_ops = {
.open = msm_pcm_open,
.copy_user = msm_pcm_copy,
.hw_params = msm_pcm_hw_params,
.close = msm_pcm_close,
.prepare = msm_pcm_prepare,
.trigger = msm_pcm_trigger,
.pointer = msm_pcm_pointer,
};
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 struct snd_soc_platform_driver msm_soc_platform = {
.ops = &msm_pcm_ops,
.pcm_new = msm_asoc_pcm_new,
.probe = msm_pcm_dtmf_probe,
};
static int msm_pcm_probe(struct platform_device *pdev)
{
pr_debug("%s: dev name %s\n", __func__, dev_name(&pdev->dev));
return snd_soc_register_platform(&pdev->dev,
&msm_soc_platform);
}
static int msm_pcm_remove(struct platform_device *pdev)
{
snd_soc_unregister_platform(&pdev->dev);
return 0;
}
static const struct of_device_id msm_pcm_dtmf_dt_match[] = {
{.compatible = "qcom,msm-pcm-dtmf"},
{}
};
MODULE_DEVICE_TABLE(of, msm_pcm_dtmf_dt_match);
static struct platform_driver msm_pcm_driver = {
.driver = {
.name = "msm-pcm-dtmf",
.owner = THIS_MODULE,
.of_match_table = msm_pcm_dtmf_dt_match,
},
.probe = msm_pcm_probe,
.remove = msm_pcm_remove,
};
int __init msm_pcm_dtmf_init(void)
{
return platform_driver_register(&msm_pcm_driver);
}
void msm_pcm_dtmf_exit(void)
{
platform_driver_unregister(&msm_pcm_driver);
}
MODULE_DESCRIPTION("DTMF platform driver");
MODULE_LICENSE("GPL v2");