arch/arm/mach-msm/qdsp6v2/pcm_in.c - kernel/msm - Gitiles

 /*
  * Copyright (C) 2009 Google, Inc.
  * Copyright (C) 2009 HTC Corporation
  * Copyright (c) 2010-2012, The Linux Foundation. All rights reserved.
  *
  * This software is licensed under the terms of the GNU General Public
  * License version 2, as published by the Free Software Foundation, and
  * may be copied, distributed, and modified under those terms.
  *
  * 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/fs.h>
 #include <linux/module.h>
 #include <linux/miscdevice.h>
 #include <linux/mutex.h>
 #include <linux/sched.h>
 #include <linux/uaccess.h>
 #include <linux/spinlock.h>
 #include <linux/slab.h>
 #include <linux/wait.h>
 #include <linux/msm_audio.h>
 #include <linux/pm_qos.h>

 #include <asm/atomic.h>
 #include <mach/debug_mm.h>
 #include <mach/qdsp6v2/audio_dev_ctl.h>
 #include <sound/q6asm.h>
 #include <sound/apr_audio.h>
 #include <linux/wakelock.h>
 #include <mach/cpuidle.h>

 #define MAX_BUF 4
 #define BUFSZ (480 * 8)
 #define BUFFER_SIZE_MULTIPLE 4
 #define MIN_BUFFER_SIZE 160

 #define VOC_REC_NONE 0xFF

 struct pcm {
 	struct mutex lock;
 	struct mutex read_lock;
 	wait_queue_head_t wait;
 	spinlock_t dsp_lock;
 	struct audio_client *ac;
 	uint32_t sample_rate;
 	uint32_t channel_count;
 	uint32_t buffer_size;
 	uint32_t buffer_count;
 	uint32_t rec_mode;
 	uint32_t in_frame_info[MAX_BUF][2];
 	atomic_t in_count;
 	atomic_t in_enabled;
 	atomic_t in_opened;
 	atomic_t in_stopped;
 	struct wake_lock wakelock;
 	struct pm_qos_request pm_qos_req;
 };

 static void pcm_in_get_dsp_buffers(struct pcm*,
 				uint32_t token, uint32_t *payload);

 void pcm_in_cb(uint32_t opcode, uint32_t token,
 		uint32_t *payload, void *priv)
 {
 	struct pcm *pcm = (struct pcm *) priv;
 	unsigned long flags;

 	spin_lock_irqsave(&pcm->dsp_lock, flags);
 	switch (opcode) {
 	case ASM_DATA_EVENT_READ_DONE:
 		pcm_in_get_dsp_buffers(pcm, token, payload);
 		break;
 	case RESET_EVENTS:
 		reset_device();
 		break;
 	default:
 		break;
 	}
 	spin_unlock_irqrestore(&pcm->dsp_lock, flags);
 }
 static void pcm_in_prevent_sleep(struct pcm *audio)
 {
 	pr_debug("%s:\n", __func__);
 	wake_lock(&audio->wakelock);
 	pm_qos_update_request(&audio->pm_qos_req,
 			      msm_cpuidle_get_deep_idle_latency());
 }

 static void pcm_in_allow_sleep(struct pcm *audio)
 {
 	pr_debug("%s:\n", __func__);
 	pm_qos_update_request(&audio->pm_qos_req, PM_QOS_DEFAULT_VALUE);
 	wake_unlock(&audio->wakelock);
 }

 static void pcm_in_get_dsp_buffers(struct pcm *pcm,
 				uint32_t token, uint32_t *payload)
 {
 	pcm->in_frame_info[token][0] = payload[7];
 	pcm->in_frame_info[token][1] = payload[3];
 	if (atomic_read(&pcm->in_count) <= pcm->buffer_count)
 		atomic_inc(&pcm->in_count);
 	wake_up(&pcm->wait);
 }

 static int pcm_in_enable(struct pcm *pcm)
 {
 	if (atomic_read(&pcm->in_enabled))
 		return 0;
 	return q6asm_run(pcm->ac, 0, 0, 0);
 }

 static int pcm_in_disable(struct pcm *pcm)
 {
 	int rc = 0;

 	if (atomic_read(&pcm->in_opened)) {
 		atomic_set(&pcm->in_enabled, 0);
 		atomic_set(&pcm->in_opened, 0);
 		rc = q6asm_cmd(pcm->ac, CMD_CLOSE);

 		atomic_set(&pcm->in_stopped, 1);
 		memset(pcm->in_frame_info, 0,
 				sizeof(char) * pcm->buffer_count * 2);
 		wake_up(&pcm->wait);
 	}
 	return rc;
 }

 static int config(struct pcm *pcm)
 {
 	int rc = 0;

 	pr_debug("%s: pcm prefill, buffer_size = %d\n", __func__,
 		pcm->buffer_size);
 	rc = q6asm_audio_client_buf_alloc(OUT, pcm->ac,
 				pcm->buffer_size, pcm->buffer_count);
 	if (rc < 0) {
 		pr_err("Audio Start: Buffer Allocation failed \
 						rc = %d\n", rc);
 		goto fail;
 	}

 	rc = q6asm_enc_cfg_blk_pcm(pcm->ac, pcm->sample_rate,
 						pcm->channel_count);
 	if (rc < 0) {
 		pr_err("%s: cmd media format block failed", __func__);
 		goto fail;
 	}
 fail:
 	return rc;
 }

 static long pcm_in_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
 {
 	struct pcm *pcm = file->private_data;
 	int rc = 0;

 	mutex_lock(&pcm->lock);
 	switch (cmd) {
 	case AUDIO_SET_VOLUME:
 		break;
 	case AUDIO_GET_STATS: {
 		struct msm_audio_stats stats;
 		memset(&stats, 0, sizeof(stats));
 		if (copy_to_user((void *) arg, &stats, sizeof(stats)))
 			rc = -EFAULT;
 		break;
 	}
 	case AUDIO_START: {
 		int cnt = 0;
 		if (atomic_read(&pcm->in_enabled)) {
 			pr_info("%s:AUDIO_START already over\n", __func__);
 			rc = 0;
 			break;
 		}
 		rc = config(pcm);
 		if (rc) {
 			pr_err("%s: IN Configuration failed\n", __func__);
 			rc = -EFAULT;
 			break;
 		}

 		rc = pcm_in_enable(pcm);
 		if (rc) {
 			pr_err("%s: In Enable failed\n", __func__);
 			rc = -EFAULT;
 			break;
 		}
 		pcm_in_prevent_sleep(pcm);
 		atomic_set(&pcm->in_enabled, 1);

 		while (cnt++ < pcm->buffer_count)
 			q6asm_read(pcm->ac);
 		pr_info("%s: AUDIO_START session id[%d]\n", __func__,
 							pcm->ac->session);

 		if (pcm->rec_mode != VOC_REC_NONE)
 			msm_enable_incall_recording(pcm->ac->session,
 			pcm->rec_mode, pcm->sample_rate, pcm->channel_count);

 		break;
 	}
 	case AUDIO_GET_SESSION_ID: {
 		if (copy_to_user((void *) arg, &pcm->ac->session,
 					sizeof(unsigned short)))
 			rc = -EFAULT;
 		break;
 	}
 	case AUDIO_STOP:
 		break;
 	case AUDIO_FLUSH:
 		break;
 	case AUDIO_SET_CONFIG: {
 		struct msm_audio_config config;

 		if (copy_from_user(&config, (void *) arg, sizeof(config))) {
 			rc = -EFAULT;
 			break;
 		}
 		pr_debug("%s: SET_CONFIG: buffer_size:%d channel_count:%d"
 			"sample_rate:%d, buffer_count:%d\n", __func__,
 			config.buffer_size, config.channel_count,
 			config.sample_rate, config.buffer_count);

 		if (!config.channel_count || config.channel_count > 2) {
 			rc = -EINVAL;
 			break;
 		}

 		if (config.sample_rate < 8000 || config.sample_rate > 48000) {
 			rc = -EINVAL;
 			break;
 		}

 		if ((config.buffer_size % (config.channel_count *
 			BUFFER_SIZE_MULTIPLE)) ||
 			(config.buffer_size < MIN_BUFFER_SIZE)) {
 			pr_err("%s: Buffer Size should be multiple of "
 				"[4 * no. of channels] and greater than 160\n",
 				__func__);
 			rc = -EINVAL;
 			break;
 		}

 		pcm->sample_rate = config.sample_rate;
 		pcm->channel_count = config.channel_count;
 		pcm->buffer_size = config.buffer_size;
 		pcm->buffer_count = config.buffer_count;
 		break;
 	}
 	case AUDIO_GET_CONFIG: {
 		struct msm_audio_config config;
 		config.buffer_size = pcm->buffer_size;
 		config.buffer_count = pcm->buffer_count;
 		config.sample_rate = pcm->sample_rate;
 		config.channel_count = pcm->channel_count;
 		config.unused[0] = 0;
 		config.unused[1] = 0;
 		config.unused[2] = 0;
 		if (copy_to_user((void *) arg, &config, sizeof(config)))
 			rc = -EFAULT;
 		break;
 	}
 	case AUDIO_ENABLE_AUDPRE: {

 		uint16_t enable_mask;

 		if (copy_from_user(&enable_mask, (void *) arg,
 						sizeof(enable_mask))) {
 			rc = -EFAULT;
 			break;
 		}
 		if (enable_mask & FLUENCE_ENABLE)
 			rc = auddev_cfg_tx_copp_topology(pcm->ac->session,
 					VPM_TX_DM_FLUENCE_COPP_TOPOLOGY);
 		else
 			rc = auddev_cfg_tx_copp_topology(pcm->ac->session,
 					DEFAULT_COPP_TOPOLOGY);
 		break;
 	}

 	case AUDIO_SET_INCALL: {
 		if (copy_from_user(&pcm->rec_mode,
 				   (void *) arg,
 				   sizeof(pcm->rec_mode))) {
 			rc = -EFAULT;
 			pr_err("%s: Error copying in-call mode\n", __func__);
 			break;
 		}

 		if (pcm->rec_mode != VOC_REC_UPLINK &&
 		    pcm->rec_mode != VOC_REC_DOWNLINK &&
 		    pcm->rec_mode != VOC_REC_BOTH) {
 			rc = -EINVAL;
 			pcm->rec_mode = VOC_REC_NONE;

 			pr_err("%s: Invalid %d in-call rec_mode\n",
 			       __func__, pcm->rec_mode);
 			break;
 		}

 		pr_debug("%s: In-call rec_mode %d\n", __func__, pcm->rec_mode);
 		break;
 	}

 	default:
 		rc = -EINVAL;
 		break;
 	}
 	mutex_unlock(&pcm->lock);
 	return rc;
 }

 static int pcm_in_open(struct inode *inode, struct file *file)
 {
 	struct pcm *pcm;
 	int rc = 0;
 	char name[24];

 	pcm = kzalloc(sizeof(struct pcm), GFP_KERNEL);
 	if (!pcm)
 		return -ENOMEM;

 	pcm->channel_count = 1;
 	pcm->sample_rate = 8000;
 	pcm->buffer_size = BUFSZ;
 	pcm->buffer_count = MAX_BUF;

 	pcm->ac = q6asm_audio_client_alloc((app_cb)pcm_in_cb, (void *)pcm);
 	if (!pcm->ac) {
 		pr_err("%s: Could not allocate memory\n", __func__);
 		rc = -ENOMEM;
 		goto fail;
 	}

 	mutex_init(&pcm->lock);
 	mutex_init(&pcm->read_lock);
 	spin_lock_init(&pcm->dsp_lock);
 	init_waitqueue_head(&pcm->wait);

 	rc = q6asm_open_read(pcm->ac, FORMAT_LINEAR_PCM);
 	if (rc < 0) {
 		pr_err("%s: Cmd Open Failed\n", __func__);
 		goto fail;
 	}

 	atomic_set(&pcm->in_stopped, 0);
 	atomic_set(&pcm->in_enabled, 0);
 	atomic_set(&pcm->in_count, 0);
 	atomic_set(&pcm->in_opened, 1);
 	snprintf(name, sizeof name, "pcm_in_%x", pcm->ac->session);
 	wake_lock_init(&pcm->wakelock, WAKE_LOCK_SUSPEND, name);
 	snprintf(name, sizeof name, "pcm_in_idle_%x", pcm->ac->session);
 	pm_qos_add_request(&pcm->pm_qos_req, PM_QOS_CPU_DMA_LATENCY,
 				PM_QOS_DEFAULT_VALUE);

 	pcm->rec_mode = VOC_REC_NONE;

 	file->private_data = pcm;
 	pr_info("%s: pcm in open session id[%d]\n", __func__, pcm->ac->session);
 	return 0;
 fail:
 	if (pcm->ac)
 		q6asm_audio_client_free(pcm->ac);
 	kfree(pcm);
 	return rc;
 }

 static ssize_t pcm_in_read(struct file *file, char __user *buf,
 			  size_t count, loff_t *pos)
 {
 	struct pcm *pcm = file->private_data;
 	const char __user *start = buf;
 	void *data;
 	uint32_t offset = 0;
 	uint32_t size = 0;
 	uint32_t idx;
 	int rc = 0;
 	int len = 0;

 	if (!atomic_read(&pcm->in_enabled))
 		return -EFAULT;
 	mutex_lock(&pcm->read_lock);
 	while (count > 0) {
 		rc = wait_event_timeout(pcm->wait,
 				(atomic_read(&pcm->in_count) ||
 				atomic_read(&pcm->in_stopped)), 5 * HZ);
 		if (!rc) {
 			pr_err("%s: wait_event_timeout failed\n", __func__);
 			goto fail;
 		}

 		if (atomic_read(&pcm->in_stopped) &&
 					!atomic_read(&pcm->in_count)) {
 			mutex_unlock(&pcm->read_lock);
 			return 0;
 		}

 		data = q6asm_is_cpu_buf_avail(OUT, pcm->ac, &size, &idx);
 		if (count >= size)
 			len = size;
 		else {
 			len = count;
 			pr_err("%s: short read data[%p]bytesavail[%d]"
 				"bytesrequest[%d]"
 				"bytesrejected%d]\n",\
 				__func__, data, size,
 				count, (size - count));
 		}
 		if ((len) && data) {
 			offset = pcm->in_frame_info[idx][1];
 			if (copy_to_user(buf, data+offset, len)) {
 				pr_err("%s copy_to_user failed len[%d]\n",
 							__func__, len);
 				rc = -EFAULT;
 				goto fail;
 			}
 			count -= len;
 			buf += len;
 		}
 		atomic_dec(&pcm->in_count);
 		memset(&pcm->in_frame_info[idx], 0,
 						sizeof(uint32_t) * 2);

 		rc = q6asm_read(pcm->ac);
 		if (rc < 0) {
 			pr_err("%s q6asm_read fail\n", __func__);
 				goto fail;
 		}
 		rmb();
 		break;
 	}
 	rc = buf-start;
 fail:
 	mutex_unlock(&pcm->read_lock);
 	return rc;
 }

 static int pcm_in_release(struct inode *inode, struct file *file)
 {
 	int rc = 0;
 	struct pcm *pcm = file->private_data;

 	pr_info("[%s:%s] release session id[%d]\n", __MM_FILE__,
 		__func__, pcm->ac->session);
 	mutex_lock(&pcm->lock);

 	if ((pcm->rec_mode != VOC_REC_NONE) && atomic_read(&pcm->in_enabled)) {
 		msm_disable_incall_recording(pcm->ac->session, pcm->rec_mode);

 		pcm->rec_mode = VOC_REC_NONE;
 	}

 	/* remove this session from topology list */
 	auddev_cfg_tx_copp_topology(pcm->ac->session,
 				DEFAULT_COPP_TOPOLOGY);
 	mutex_unlock(&pcm->lock);

 	rc = pcm_in_disable(pcm);
 	 msm_clear_session_id(pcm->ac->session);
 	q6asm_audio_client_free(pcm->ac);
 	pcm_in_allow_sleep(pcm);
 	wake_lock_destroy(&pcm->wakelock);
 	pm_qos_remove_request(&pcm->pm_qos_req);
 	kfree(pcm);
 	return rc;
 }

 static const struct file_operations pcm_in_fops = {
 	.owner		= THIS_MODULE,
 	.open		= pcm_in_open,
 	.read		= pcm_in_read,
 	.release	= pcm_in_release,
 	.unlocked_ioctl	= pcm_in_ioctl,
 };

 struct miscdevice pcm_in_misc = {
 	.minor	= MISC_DYNAMIC_MINOR,
 	.name	= "msm_pcm_in",
 	.fops	= &pcm_in_fops,
 };

 static int __init pcm_in_init(void)
 {
 	return misc_register(&pcm_in_misc);
 }

 device_initcall(pcm_in_init);
	/*
	* Copyright (C) 2009 Google, Inc.
	* Copyright (C) 2009 HTC Corporation
	* Copyright (c) 2010-2012, The Linux Foundation. All rights reserved.
	*
	* This software is licensed under the terms of the GNU General Public
	* License version 2, as published by the Free Software Foundation, and
	* may be copied, distributed, and modified under those terms.
	*
	* 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/fs.h>
	#include <linux/module.h>
	#include <linux/miscdevice.h>
	#include <linux/mutex.h>
	#include <linux/sched.h>
	#include <linux/uaccess.h>
	#include <linux/spinlock.h>
	#include <linux/slab.h>
	#include <linux/wait.h>
	#include <linux/msm_audio.h>
	#include <linux/pm_qos.h>

	#include <asm/atomic.h>
	#include <mach/debug_mm.h>
	#include <mach/qdsp6v2/audio_dev_ctl.h>
	#include <sound/q6asm.h>
	#include <sound/apr_audio.h>
	#include <linux/wakelock.h>
	#include <mach/cpuidle.h>

	#define MAX_BUF 4
	#define BUFSZ (480 * 8)
	#define BUFFER_SIZE_MULTIPLE 4
	#define MIN_BUFFER_SIZE 160

	#define VOC_REC_NONE 0xFF

	struct pcm {
	struct mutex lock;
	struct mutex read_lock;
	wait_queue_head_t wait;
	spinlock_t dsp_lock;
	struct audio_client *ac;
	uint32_t sample_rate;
	uint32_t channel_count;
	uint32_t buffer_size;
	uint32_t buffer_count;
	uint32_t rec_mode;
	uint32_t in_frame_info[MAX_BUF][2];
	atomic_t in_count;
	atomic_t in_enabled;
	atomic_t in_opened;
	atomic_t in_stopped;
	struct wake_lock wakelock;
	struct pm_qos_request pm_qos_req;
	};

	static void pcm_in_get_dsp_buffers(struct pcm*,
	uint32_t token, uint32_t *payload);

	void pcm_in_cb(uint32_t opcode, uint32_t token,
	uint32_t payload, void priv)
	{
	struct pcm pcm = (struct pcm ) priv;
	unsigned long flags;

	spin_lock_irqsave(&pcm->dsp_lock, flags);
	switch (opcode) {
	case ASM_DATA_EVENT_READ_DONE:
	pcm_in_get_dsp_buffers(pcm, token, payload);
	break;
	case RESET_EVENTS:
	reset_device();
	break;
	default:
	break;
	}
	spin_unlock_irqrestore(&pcm->dsp_lock, flags);
	}
	static void pcm_in_prevent_sleep(struct pcm *audio)
	{
	pr_debug("%s:\n", __func__);
	wake_lock(&audio->wakelock);
	pm_qos_update_request(&audio->pm_qos_req,
	msm_cpuidle_get_deep_idle_latency());
	}

	static void pcm_in_allow_sleep(struct pcm *audio)
	{
	pr_debug("%s:\n", __func__);
	pm_qos_update_request(&audio->pm_qos_req, PM_QOS_DEFAULT_VALUE);
	wake_unlock(&audio->wakelock);
	}

	static void pcm_in_get_dsp_buffers(struct pcm *pcm,
	uint32_t token, uint32_t *payload)
	{
	pcm->in_frame_info[token][0] = payload[7];
	pcm->in_frame_info[token][1] = payload[3];
	if (atomic_read(&pcm->in_count) <= pcm->buffer_count)
	atomic_inc(&pcm->in_count);
	wake_up(&pcm->wait);
	}

	static int pcm_in_enable(struct pcm *pcm)
	{
	if (atomic_read(&pcm->in_enabled))
	return 0;
	return q6asm_run(pcm->ac, 0, 0, 0);
	}

	static int pcm_in_disable(struct pcm *pcm)
	{
	int rc = 0;

	if (atomic_read(&pcm->in_opened)) {
	atomic_set(&pcm->in_enabled, 0);
	atomic_set(&pcm->in_opened, 0);
	rc = q6asm_cmd(pcm->ac, CMD_CLOSE);

	atomic_set(&pcm->in_stopped, 1);
	memset(pcm->in_frame_info, 0,
	sizeof(char) * pcm->buffer_count * 2);
	wake_up(&pcm->wait);
	}
	return rc;
	}

	static int config(struct pcm *pcm)
	{
	int rc = 0;

	pr_debug("%s: pcm prefill, buffer_size = %d\n", __func__,
	pcm->buffer_size);
	rc = q6asm_audio_client_buf_alloc(OUT, pcm->ac,
	pcm->buffer_size, pcm->buffer_count);
	if (rc < 0) {
	pr_err("Audio Start: Buffer Allocation failed \
	rc = %d\n", rc);
	goto fail;
	}

	rc = q6asm_enc_cfg_blk_pcm(pcm->ac, pcm->sample_rate,
	pcm->channel_count);
	if (rc < 0) {
	pr_err("%s: cmd media format block failed", __func__);
	goto fail;
	}
	fail:
	return rc;
	}

	static long pcm_in_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
	{
	struct pcm *pcm = file->private_data;
	int rc = 0;

	mutex_lock(&pcm->lock);
	switch (cmd) {
	case AUDIO_SET_VOLUME:
	break;
	case AUDIO_GET_STATS: {
	struct msm_audio_stats stats;
	memset(&stats, 0, sizeof(stats));
	if (copy_to_user((void *) arg, &stats, sizeof(stats)))
	rc = -EFAULT;
	break;
	}
	case AUDIO_START: {
	int cnt = 0;
	if (atomic_read(&pcm->in_enabled)) {
	pr_info("%s:AUDIO_START already over\n", __func__);
	rc = 0;
	break;
	}
	rc = config(pcm);
	if (rc) {
	pr_err("%s: IN Configuration failed\n", __func__);
	rc = -EFAULT;
	break;
	}

	rc = pcm_in_enable(pcm);
	if (rc) {
	pr_err("%s: In Enable failed\n", __func__);
	rc = -EFAULT;
	break;
	}
	pcm_in_prevent_sleep(pcm);
	atomic_set(&pcm->in_enabled, 1);

	while (cnt++ < pcm->buffer_count)
	q6asm_read(pcm->ac);
	pr_info("%s: AUDIO_START session id[%d]\n", __func__,
	pcm->ac->session);

	if (pcm->rec_mode != VOC_REC_NONE)
	msm_enable_incall_recording(pcm->ac->session,
	pcm->rec_mode, pcm->sample_rate, pcm->channel_count);

	break;
	}
	case AUDIO_GET_SESSION_ID: {
	if (copy_to_user((void *) arg, &pcm->ac->session,
	sizeof(unsigned short)))
	rc = -EFAULT;
	break;
	}
	case AUDIO_STOP:
	break;
	case AUDIO_FLUSH:
	break;
	case AUDIO_SET_CONFIG: {
	struct msm_audio_config config;

	if (copy_from_user(&config, (void *) arg, sizeof(config))) {
	rc = -EFAULT;
	break;
	}
	pr_debug("%s: SET_CONFIG: buffer_size:%d channel_count:%d"
	"sample_rate:%d, buffer_count:%d\n", __func__,
	config.buffer_size, config.channel_count,
	config.sample_rate, config.buffer_count);

	if (!config.channel_count \|\| config.channel_count > 2) {
	rc = -EINVAL;
	break;
	}

	if (config.sample_rate < 8000 \|\| config.sample_rate > 48000) {
	rc = -EINVAL;
	break;
	}

	if ((config.buffer_size % (config.channel_count *
	BUFFER_SIZE_MULTIPLE)) \|\|
	(config.buffer_size < MIN_BUFFER_SIZE)) {
	pr_err("%s: Buffer Size should be multiple of "
	"[4 * no. of channels] and greater than 160\n",
	__func__);
	rc = -EINVAL;
	break;
	}

	pcm->sample_rate = config.sample_rate;
	pcm->channel_count = config.channel_count;
	pcm->buffer_size = config.buffer_size;
	pcm->buffer_count = config.buffer_count;
	break;
	}
	case AUDIO_GET_CONFIG: {
	struct msm_audio_config config;
	config.buffer_size = pcm->buffer_size;
	config.buffer_count = pcm->buffer_count;
	config.sample_rate = pcm->sample_rate;
	config.channel_count = pcm->channel_count;
	config.unused[0] = 0;
	config.unused[1] = 0;
	config.unused[2] = 0;
	if (copy_to_user((void *) arg, &config, sizeof(config)))
	rc = -EFAULT;
	break;
	}
	case AUDIO_ENABLE_AUDPRE: {

	uint16_t enable_mask;

	if (copy_from_user(&enable_mask, (void *) arg,
	sizeof(enable_mask))) {
	rc = -EFAULT;
	break;
	}
	if (enable_mask & FLUENCE_ENABLE)
	rc = auddev_cfg_tx_copp_topology(pcm->ac->session,
	VPM_TX_DM_FLUENCE_COPP_TOPOLOGY);
	else
	rc = auddev_cfg_tx_copp_topology(pcm->ac->session,
	DEFAULT_COPP_TOPOLOGY);
	break;
	}

	case AUDIO_SET_INCALL: {
	if (copy_from_user(&pcm->rec_mode,
	(void *) arg,
	sizeof(pcm->rec_mode))) {
	rc = -EFAULT;
	pr_err("%s: Error copying in-call mode\n", __func__);
	break;
	}

	if (pcm->rec_mode != VOC_REC_UPLINK &&
	pcm->rec_mode != VOC_REC_DOWNLINK &&
	pcm->rec_mode != VOC_REC_BOTH) {
	rc = -EINVAL;
	pcm->rec_mode = VOC_REC_NONE;

	pr_err("%s: Invalid %d in-call rec_mode\n",
	__func__, pcm->rec_mode);
	break;
	}

	pr_debug("%s: In-call rec_mode %d\n", __func__, pcm->rec_mode);
	break;
	}

	default:
	rc = -EINVAL;
	break;
	}
	mutex_unlock(&pcm->lock);
	return rc;
	}

	static int pcm_in_open(struct inode inode, struct file file)
	{
	struct pcm *pcm;
	int rc = 0;
	char name[24];

	pcm = kzalloc(sizeof(struct pcm), GFP_KERNEL);
	if (!pcm)
	return -ENOMEM;

	pcm->channel_count = 1;
	pcm->sample_rate = 8000;
	pcm->buffer_size = BUFSZ;
	pcm->buffer_count = MAX_BUF;

	pcm->ac = q6asm_audio_client_alloc((app_cb)pcm_in_cb, (void *)pcm);
	if (!pcm->ac) {
	pr_err("%s: Could not allocate memory\n", __func__);
	rc = -ENOMEM;
	goto fail;
	}

	mutex_init(&pcm->lock);
	mutex_init(&pcm->read_lock);
	spin_lock_init(&pcm->dsp_lock);
	init_waitqueue_head(&pcm->wait);

	rc = q6asm_open_read(pcm->ac, FORMAT_LINEAR_PCM);
	if (rc < 0) {
	pr_err("%s: Cmd Open Failed\n", __func__);
	goto fail;
	}

	atomic_set(&pcm->in_stopped, 0);
	atomic_set(&pcm->in_enabled, 0);
	atomic_set(&pcm->in_count, 0);
	atomic_set(&pcm->in_opened, 1);
	snprintf(name, sizeof name, "pcm_in_%x", pcm->ac->session);
	wake_lock_init(&pcm->wakelock, WAKE_LOCK_SUSPEND, name);
	snprintf(name, sizeof name, "pcm_in_idle_%x", pcm->ac->session);
	pm_qos_add_request(&pcm->pm_qos_req, PM_QOS_CPU_DMA_LATENCY,
	PM_QOS_DEFAULT_VALUE);

	pcm->rec_mode = VOC_REC_NONE;

	file->private_data = pcm;
	pr_info("%s: pcm in open session id[%d]\n", __func__, pcm->ac->session);
	return 0;
	fail:
	if (pcm->ac)
	q6asm_audio_client_free(pcm->ac);
	kfree(pcm);
	return rc;
	}

	static ssize_t pcm_in_read(struct file file, char __user buf,
	size_t count, loff_t *pos)
	{
	struct pcm *pcm = file->private_data;
	const char __user *start = buf;
	void *data;
	uint32_t offset = 0;
	uint32_t size = 0;
	uint32_t idx;
	int rc = 0;
	int len = 0;

	if (!atomic_read(&pcm->in_enabled))
	return -EFAULT;
	mutex_lock(&pcm->read_lock);
	while (count > 0) {
	rc = wait_event_timeout(pcm->wait,
	(atomic_read(&pcm->in_count) \|\|
	atomic_read(&pcm->in_stopped)), 5 * HZ);
	if (!rc) {
	pr_err("%s: wait_event_timeout failed\n", __func__);
	goto fail;
	}

	if (atomic_read(&pcm->in_stopped) &&
	!atomic_read(&pcm->in_count)) {
	mutex_unlock(&pcm->read_lock);
	return 0;
	}

	data = q6asm_is_cpu_buf_avail(OUT, pcm->ac, &size, &idx);
	if (count >= size)
	len = size;
	else {
	len = count;
	pr_err("%s: short read data[%p]bytesavail[%d]"
	"bytesrequest[%d]"
	"bytesrejected%d]\n",\
	__func__, data, size,
	count, (size - count));
	}
	if ((len) && data) {
	offset = pcm->in_frame_info[idx][1];
	if (copy_to_user(buf, data+offset, len)) {
	pr_err("%s copy_to_user failed len[%d]\n",
	__func__, len);
	rc = -EFAULT;
	goto fail;
	}
	count -= len;
	buf += len;
	}
	atomic_dec(&pcm->in_count);
	memset(&pcm->in_frame_info[idx], 0,
	sizeof(uint32_t) * 2);

	rc = q6asm_read(pcm->ac);
	if (rc < 0) {
	pr_err("%s q6asm_read fail\n", __func__);
	goto fail;
	}
	rmb();
	break;
	}
	rc = buf-start;
	fail:
	mutex_unlock(&pcm->read_lock);
	return rc;
	}

	static int pcm_in_release(struct inode inode, struct file file)
	{
	int rc = 0;
	struct pcm *pcm = file->private_data;

	pr_info("[%s:%s] release session id[%d]\n", __MM_FILE__,
	__func__, pcm->ac->session);
	mutex_lock(&pcm->lock);

	if ((pcm->rec_mode != VOC_REC_NONE) && atomic_read(&pcm->in_enabled)) {
	msm_disable_incall_recording(pcm->ac->session, pcm->rec_mode);

	pcm->rec_mode = VOC_REC_NONE;
	}

	/* remove this session from topology list */
	auddev_cfg_tx_copp_topology(pcm->ac->session,
	DEFAULT_COPP_TOPOLOGY);
	mutex_unlock(&pcm->lock);

	rc = pcm_in_disable(pcm);
	msm_clear_session_id(pcm->ac->session);
	q6asm_audio_client_free(pcm->ac);
	pcm_in_allow_sleep(pcm);
	wake_lock_destroy(&pcm->wakelock);
	pm_qos_remove_request(&pcm->pm_qos_req);
	kfree(pcm);
	return rc;
	}

	static const struct file_operations pcm_in_fops = {
	.owner = THIS_MODULE,
	.open = pcm_in_open,
	.read = pcm_in_read,
	.release = pcm_in_release,
	.unlocked_ioctl = pcm_in_ioctl,
	};

	struct miscdevice pcm_in_misc = {
	.minor = MISC_DYNAMIC_MINOR,
	.name = "msm_pcm_in",
	.fops = &pcm_in_fops,
	};

	static int __init pcm_in_init(void)
	{
	return misc_register(&pcm_in_misc);
	}

	device_initcall(pcm_in_init);