misc: qcom: qdsp6v2: add G711 decoder driver

add decoder driver for G711 and define a structure in a
new header which contains G711 specific configuration.
Pass this configuration parameters to the aDSP for
successful decode of G711 content.

CRs-Fixed: 1094107
Change-Id: I5296de4f525adec549c8d51fbf7fc76120b3b4f5
Signed-off-by: Yamit Mehta <ymehta@codeaurora.org>
Signed-off-by: Surendar karka <sukark@codeaurora.org>

3 files changed, 793 insertions, 0 deletions

diff --git a/drivers/misc/qcom/qdsp6v2/Makefile b/drivers/misc/qcom/qdsp6v2/Makefile
index 6a673220f462..90a123adbb7f 100644
--- a/drivers/misc/qcom/qdsp6v2/Makefile
+++ b/drivers/misc/qcom/qdsp6v2/Makefile
@@ -1,5 +1,6 @@
 obj-$(CONFIG_MSM_QDSP6V2_CODECS) += aac_in.o qcelp_in.o evrc_in.o amrnb_in.o g711mlaw_in.o g711alaw_in.o audio_utils.o
 obj-$(CONFIG_MSM_QDSP6V2_CODECS) += audio_wma.o audio_wmapro.o audio_aac.o audio_multi_aac.o audio_alac.o audio_ape.o audio_utils_aio.o
 obj-$(CONFIG_MSM_QDSP6V2_CODECS) += q6audio_v2.o q6audio_v2_aio.o
+obj-$(CONFIG_MSM_QDSP6V2_CODECS) += audio_g711mlaw.o audio_g711alaw.o
 obj-$(CONFIG_MSM_QDSP6V2_CODECS)  += audio_mp3.o audio_amrnb.o audio_amrwb.o audio_amrwbplus.o audio_evrc.o audio_qcelp.o amrwb_in.o audio_hwacc_effects.o
 obj-$(CONFIG_MSM_ULTRASOUND) += ultrasound/
diff --git a/drivers/misc/qcom/qdsp6v2/audio_g711alaw.c b/drivers/misc/qcom/qdsp6v2/audio_g711alaw.c
new file mode 100644
index 000000000000..6f02654d3d4c
--- /dev/null
+++ b/drivers/misc/qcom/qdsp6v2/audio_g711alaw.c
@@ -0,0 +1,396 @@
+/* Copyright (c) 2016, 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/types.h>
+#include <linux/msm_audio_g711_dec.h>
+#include <linux/compat.h>
+#include "audio_utils_aio.h"
+
+static struct miscdevice audio_g711alaw_misc;
+static struct ws_mgr audio_g711_ws_mgr;
+
+static const struct file_operations audio_g711_debug_fops = {
+	.read = audio_aio_debug_read,
+	.open = audio_aio_debug_open,
+};
+
+static struct dentry *config_debugfs_create_file(const char *name, void *data)
+{
+	return debugfs_create_file(name, S_IFREG | S_IRUGO,
+				NULL, (void *)data, &audio_g711_debug_fops);
+}
+
+static int g711_channel_map(u8 *channel_mapping, uint32_t channels);
+
+static long audio_ioctl_shared(struct file *file, unsigned int cmd,
+						void *arg)
+{
+	struct q6audio_aio *audio = file->private_data;
+	int rc = 0;
+
+	switch (cmd) {
+	case AUDIO_START: {
+		struct asm_g711_dec_cfg g711_dec_cfg;
+		struct msm_audio_g711_dec_config *g711_dec_config;
+		u8 channel_mapping[PCM_FORMAT_MAX_NUM_CHANNEL];
+
+		memset(channel_mapping, 0, PCM_FORMAT_MAX_NUM_CHANNEL);
+		memset(&g711_dec_cfg, 0, sizeof(g711_dec_cfg));
+
+		if (g711_channel_map(channel_mapping,
+			audio->pcm_cfg.channel_count)) {
+			pr_err("%s: setting channel map failed %d\n",
+					__func__, audio->pcm_cfg.channel_count);
+		}
+
+		pr_debug("%s[%pK]: AUDIO_START session_id[%d]\n", __func__,
+						audio, audio->ac->session);
+		if (audio->feedback == NON_TUNNEL_MODE) {
+			/* Configure PCM output block */
+			rc = q6asm_enc_cfg_blk_pcm_v2(audio->ac,
+					audio->pcm_cfg.sample_rate,
+					audio->pcm_cfg.channel_count,
+					16, /*bits per sample*/
+					false, false, channel_mapping);
+			if (rc < 0) {
+				pr_err("%s: pcm output block config failed rc=%d\n",
+						 __func__, rc);
+				break;
+			}
+		}
+		g711_dec_config =
+			(struct msm_audio_g711_dec_config *)audio->codec_cfg;
+		g711_dec_cfg.sample_rate = g711_dec_config->sample_rate;
+		/* Configure Media format block */
+		rc = q6asm_media_format_block_g711(audio->ac, &g711_dec_cfg,
+							audio->ac->stream_id);
+		if (rc < 0) {
+			pr_err("%s: cmd media format block failed rc=%d\n",
+				__func__, rc);
+			break;
+		}
+		rc = audio_aio_enable(audio);
+		audio->eos_rsp = 0;
+		audio->eos_flag = 0;
+		if (!rc) {
+			audio->enabled = 1;
+		} else {
+			audio->enabled = 0;
+			pr_err("%s: Audio Start procedure failed rc=%d\n",
+						__func__, rc);
+			break;
+		}
+		pr_debug("%s: AUDIO_START success enable[%d]\n",
+					 __func__, audio->enabled);
+		if (audio->stopped == 1)
+			audio->stopped = 0;
+		break;
+	}
+	default:
+		pr_debug("%s: Unknown ioctl cmd = %d", __func__, cmd);
+		break;
+	}
+	return rc;
+}
+
+static long audio_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
+{
+	struct q6audio_aio *audio = file->private_data;
+	int rc = 0;
+
+	switch (cmd) {
+	case AUDIO_START: {
+		rc = audio_ioctl_shared(file, cmd, (void *)arg);
+		break;
+	}
+	case AUDIO_GET_G711_DEC_CONFIG: {
+		if (copy_to_user((void *)arg, audio->codec_cfg,
+			sizeof(struct msm_audio_g711_dec_config))) {
+			pr_err("%s: copy_to_user for AUDIO_GET_G711_DEC_CONFIG failed\n",
+				__func__);
+			rc = -EFAULT;
+		}
+		break;
+	}
+	case AUDIO_SET_G711_DEC_CONFIG: {
+		if (copy_from_user(audio->codec_cfg, (void *)arg,
+			sizeof(struct msm_audio_g711_dec_config))) {
+			pr_err("%s: copy_from_user for AUDIO_SET_G711_DEC_CONFIG failed\n",
+				__func__);
+			rc = -EFAULT;
+		}
+		break;
+	}
+	default: {
+		rc = audio->codec_ioctl(file, cmd, arg);
+		if (rc)
+			pr_err("%s: Failed in audio_aio_ioctl: %d cmd=%d\n",
+				__func__, rc, cmd);
+		break;
+	}
+	}
+	return  rc;
+}
+
+#ifdef CONFIG_COMPAT
+struct msm_audio_g711_dec_config_32 {
+	u32 sample_rate;
+};
+
+enum {
+	AUDIO_SET_G711_DEC_CONFIG_32 =  _IOW(AUDIO_IOCTL_MAGIC,
+	(AUDIO_MAX_COMMON_IOCTL_NUM+0), struct msm_audio_g711_dec_config_32),
+	AUDIO_GET_G711_DEC_CONFIG_32 =  _IOR(AUDIO_IOCTL_MAGIC,
+	(AUDIO_MAX_COMMON_IOCTL_NUM+1), struct msm_audio_g711_dec_config_32)
+};
+
+static long audio_compat_ioctl(struct file *file, unsigned int cmd,
+						unsigned long arg)
+{
+	struct q6audio_aio *audio = file->private_data;
+	int rc = 0;
+
+	switch (cmd) {
+	case AUDIO_START: {
+		rc = audio_ioctl_shared(file, cmd, (void *)arg);
+		break;
+	}
+	case AUDIO_GET_G711_DEC_CONFIG_32: {
+		struct msm_audio_g711_dec_config *g711_dec_config;
+		struct msm_audio_g711_dec_config_32 g711_dec_config_32;
+
+		memset(&g711_dec_config_32, 0, sizeof(g711_dec_config_32));
+
+		g711_dec_config =
+			(struct msm_audio_g711_dec_config *)audio->codec_cfg;
+		g711_dec_config_32.sample_rate = g711_dec_config->sample_rate;
+
+		if (copy_to_user((void *)arg, &g711_dec_config_32,
+			sizeof(g711_dec_config_32))) {
+			pr_err("%s: copy_to_user for AUDIO_GET_G711_DEC_CONFIG_32 failed\n",
+				 __func__);
+			rc = -EFAULT;
+		}
+		break;
+	}
+	case AUDIO_SET_G711_DEC_CONFIG_32: {
+		struct msm_audio_g711_dec_config *g711_dec_config;
+		struct msm_audio_g711_dec_config_32 g711_dec_config_32;
+
+		memset(&g711_dec_config_32, 0, sizeof(g711_dec_config_32));
+
+		if (copy_from_user(&g711_dec_config_32, (void *)arg,
+			sizeof(g711_dec_config_32))) {
+			pr_err("%s: copy_from_user for AUDIO_SET_G711_DEC_CONFIG_32 failed\n",
+				__func__);
+			rc = -EFAULT;
+			break;
+		}
+
+		g711_dec_config =
+			(struct msm_audio_g711_dec_config *)audio->codec_cfg;
+		g711_dec_config->sample_rate = g711_dec_config_32.sample_rate;
+
+		break;
+	}
+	default: {
+		rc = audio->codec_compat_ioctl(file, cmd, arg);
+		if (rc)
+			pr_err("%s: Failed in audio_aio_compat_ioctl: %d cmd=%d\n",
+				__func__, rc, cmd);
+		break;
+	}
+	}
+	return rc;
+}
+#else
+#define audio_compat_ioctl NULL
+#endif
+
+static int audio_open(struct inode *inode, struct file *file)
+{
+	struct q6audio_aio *audio = NULL;
+	int rc = 0;
+	/* 4 bytes represents decoder number, 1 byte for terminate string */
+	char name[sizeof "msm_g711_" + 5];
+
+	audio = kzalloc(sizeof(struct q6audio_aio), GFP_KERNEL);
+
+	if (!audio)
+		return -ENOMEM;
+	audio->codec_cfg = kzalloc(sizeof(struct msm_audio_g711_dec_config),
+					GFP_KERNEL);
+	if (!audio->codec_cfg) {
+		kfree(audio);
+		return -ENOMEM;
+	}
+
+	audio->pcm_cfg.buffer_size = PCM_BUFSZ_MIN;
+	audio->miscdevice = &audio_g711alaw_misc;
+	audio->wakelock_voted = false;
+	audio->audio_ws_mgr = &audio_g711_ws_mgr;
+
+	init_waitqueue_head(&audio->event_wait);
+
+	audio->ac = q6asm_audio_client_alloc((app_cb) q6_audio_cb,
+					     (void *)audio);
+
+	if (!audio->ac) {
+		pr_err("%s: Could not allocate memory for audio client\n",
+					 __func__);
+		kfree(audio->codec_cfg);
+		kfree(audio);
+		return -ENOMEM;
+	}
+	rc = audio_aio_open(audio, file);
+	if (rc < 0) {
+		pr_err("%s: audio_aio_open rc=%d\n",
+			__func__, rc);
+		goto fail;
+	}
+	/* open in T/NT mode */ /*foramt:G711_ALAW*/
+	if ((file->f_mode & FMODE_WRITE) && (file->f_mode & FMODE_READ)) {
+		rc = q6asm_open_read_write(audio->ac, FORMAT_LINEAR_PCM,
+					   FORMAT_G711_ALAW_FS);
+		if (rc < 0) {
+			pr_err("%s: NT mode Open failed rc=%d\n", __func__, rc);
+			goto fail;
+		}
+		audio->feedback = NON_TUNNEL_MODE;
+		/* open G711 decoder, expected frames is always 1*/
+		audio->buf_cfg.frames_per_buf = 0x01;
+		audio->buf_cfg.meta_info_enable = 0x01;
+	} else if ((file->f_mode & FMODE_WRITE) &&
+			!(file->f_mode & FMODE_READ)) {
+		rc = q6asm_open_write(audio->ac, FORMAT_G711_ALAW_FS);
+		if (rc < 0) {
+			pr_err("%s: T mode Open failed rc=%d\n", __func__, rc);
+			goto fail;
+		}
+		audio->feedback = TUNNEL_MODE;
+		audio->buf_cfg.meta_info_enable = 0x00;
+	} else {
+		pr_err("%s: %d mode is not supported mode\n",
+				__func__, file->f_mode);
+		rc = -EACCES;
+		goto fail;
+	}
+
+	snprintf(name, sizeof(name), "msm_g711_%04x", audio->ac->session);
+	audio->dentry = config_debugfs_create_file(name, (void *)audio);
+
+	if (IS_ERR_OR_NULL(audio->dentry))
+		pr_debug("%s: debugfs_create_file failed\n", __func__);
+	pr_debug("%s: g711dec success mode[%d]session[%d]\n", __func__,
+						audio->feedback,
+						audio->ac->session);
+	return rc;
+fail:
+	q6asm_audio_client_free(audio->ac);
+	kfree(audio->codec_cfg);
+	kfree(audio);
+	return rc;
+}
+
+static int g711_channel_map(u8 *channel_mapping, uint32_t channels)
+{
+	u8 *lchannel_mapping;
+
+	lchannel_mapping = channel_mapping;
+	pr_debug("%s: channels passed: %d\n", __func__, channels);
+	if (channels == 1)  {
+		lchannel_mapping[0] = PCM_CHANNEL_FC;
+	} else if (channels == 2) {
+		lchannel_mapping[0] = PCM_CHANNEL_FL;
+		lchannel_mapping[1] = PCM_CHANNEL_FR;
+	} else if (channels == 3) {
+		lchannel_mapping[0] = PCM_CHANNEL_FC;
+		lchannel_mapping[1] = PCM_CHANNEL_FL;
+		lchannel_mapping[2] = PCM_CHANNEL_FR;
+	} else if (channels == 4) {
+		lchannel_mapping[0] = PCM_CHANNEL_FC;
+		lchannel_mapping[1] = PCM_CHANNEL_FL;
+		lchannel_mapping[2] = PCM_CHANNEL_FR;
+		lchannel_mapping[3] = PCM_CHANNEL_CS;
+	} else if (channels == 5) {
+		lchannel_mapping[0] = PCM_CHANNEL_FC;
+		lchannel_mapping[1] = PCM_CHANNEL_FL;
+		lchannel_mapping[2] = PCM_CHANNEL_FR;
+		lchannel_mapping[3] = PCM_CHANNEL_LS;
+		lchannel_mapping[4] = PCM_CHANNEL_RS;
+	} else if (channels == 6) {
+		lchannel_mapping[0] = PCM_CHANNEL_FC;
+		lchannel_mapping[1] = PCM_CHANNEL_FL;
+		lchannel_mapping[2] = PCM_CHANNEL_FR;
+		lchannel_mapping[3] = PCM_CHANNEL_LS;
+		lchannel_mapping[4] = PCM_CHANNEL_RS;
+		lchannel_mapping[5] = PCM_CHANNEL_LFE;
+	} else if (channels == 7) {
+		lchannel_mapping[0] = PCM_CHANNEL_FC;
+		lchannel_mapping[1] = PCM_CHANNEL_FL;
+		lchannel_mapping[2] = PCM_CHANNEL_FR;
+		lchannel_mapping[3] = PCM_CHANNEL_LS;
+		lchannel_mapping[4] = PCM_CHANNEL_RS;
+		lchannel_mapping[5] = PCM_CHANNEL_CS;
+		lchannel_mapping[6] = PCM_CHANNEL_LFE;
+	} else if (channels == 8) {
+		lchannel_mapping[0] = PCM_CHANNEL_FC;
+		lchannel_mapping[1] = PCM_CHANNEL_FLC;
+		lchannel_mapping[2] = PCM_CHANNEL_FRC;
+		lchannel_mapping[3] = PCM_CHANNEL_FL;
+		lchannel_mapping[4] = PCM_CHANNEL_FR;
+		lchannel_mapping[5] = PCM_CHANNEL_LS;
+		lchannel_mapping[6] = PCM_CHANNEL_RS;
+		lchannel_mapping[7] = PCM_CHANNEL_LFE;
+	} else {
+		pr_err("%s: ERROR.unsupported num_ch = %u\n",
+				__func__, channels);
+		return -EINVAL;
+	}
+	return 0;
+}
+
+static const struct file_operations audio_g711_fops = {
+	.owner = THIS_MODULE,
+	.open = audio_open,
+	.release = audio_aio_release,
+	.unlocked_ioctl = audio_ioctl,
+	.compat_ioctl = audio_compat_ioctl,
+	.fsync = audio_aio_fsync,
+};
+
+static struct miscdevice audio_g711alaw_misc = {
+	.minor = MISC_DYNAMIC_MINOR,
+	.name = "msm_g711alaw",
+	.fops = &audio_g711_fops,
+};
+
+static int __init audio_g711alaw_init(void)
+{
+	int ret = misc_register(&audio_g711alaw_misc);
+
+	if (ret == 0)
+		device_init_wakeup(audio_g711alaw_misc.this_device, true);
+	audio_g711_ws_mgr.ref_cnt = 0;
+	mutex_init(&audio_g711_ws_mgr.ws_lock);
+
+	return ret;
+}
+static void __exit audio_g711alaw_exit(void)
+{
+	misc_deregister(&audio_g711alaw_misc);
+	mutex_destroy(&audio_g711_ws_mgr.ws_lock);
+}
+
+device_initcall(audio_g711alaw_init);
+__exitcall(audio_g711alaw_exit);
diff --git a/drivers/misc/qcom/qdsp6v2/audio_g711mlaw.c b/drivers/misc/qcom/qdsp6v2/audio_g711mlaw.c
new file mode 100644
index 000000000000..cae2490feb7a
--- /dev/null
+++ b/drivers/misc/qcom/qdsp6v2/audio_g711mlaw.c
@@ -0,0 +1,396 @@
+/* Copyright (c) 2016, 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/types.h>
+#include <linux/msm_audio_g711_dec.h>
+#include <linux/compat.h>
+#include "audio_utils_aio.h"
+
+static struct miscdevice audio_g711mlaw_misc;
+static struct ws_mgr audio_g711_ws_mgr;
+
+static const struct file_operations audio_g711_debug_fops = {
+	.read = audio_aio_debug_read,
+	.open = audio_aio_debug_open,
+};
+
+static struct dentry *config_debugfs_create_file(const char *name, void *data)
+{
+	return debugfs_create_file(name, S_IFREG | S_IRUGO,
+				NULL, (void *)data, &audio_g711_debug_fops);
+}
+
+static int g711_channel_map(u8 *channel_mapping, uint32_t channels);
+
+static long audio_ioctl_shared(struct file *file, unsigned int cmd,
+						void *arg)
+{
+	struct q6audio_aio *audio = file->private_data;
+	int rc = 0;
+
+	switch (cmd) {
+	case AUDIO_START: {
+		struct asm_g711_dec_cfg g711_dec_cfg;
+		struct msm_audio_g711_dec_config *g711_dec_config;
+		u8 channel_mapping[PCM_FORMAT_MAX_NUM_CHANNEL];
+
+		memset(channel_mapping, 0, PCM_FORMAT_MAX_NUM_CHANNEL);
+		memset(&g711_dec_cfg, 0, sizeof(g711_dec_cfg));
+
+		if (g711_channel_map(channel_mapping,
+			audio->pcm_cfg.channel_count)) {
+			pr_err("%s: setting channel map failed %d\n",
+					__func__, audio->pcm_cfg.channel_count);
+		}
+
+		pr_debug("%s[%pK]: AUDIO_START session_id[%d]\n", __func__,
+						audio, audio->ac->session);
+		if (audio->feedback == NON_TUNNEL_MODE) {
+			/* Configure PCM output block */
+			rc = q6asm_enc_cfg_blk_pcm_v2(audio->ac,
+					audio->pcm_cfg.sample_rate,
+					audio->pcm_cfg.channel_count,
+					16, /*bits per sample*/
+					false, false, channel_mapping);
+			if (rc < 0) {
+				pr_err("%s: pcm output block config failed rc=%d\n",
+						 __func__, rc);
+				break;
+			}
+		}
+		g711_dec_config =
+			(struct msm_audio_g711_dec_config *)audio->codec_cfg;
+		g711_dec_cfg.sample_rate = g711_dec_config->sample_rate;
+		/* Configure Media format block */
+		rc = q6asm_media_format_block_g711(audio->ac, &g711_dec_cfg,
+							audio->ac->stream_id);
+		if (rc < 0) {
+			pr_err("%s: cmd media format block failed rc=%d\n",
+				__func__, rc);
+			break;
+		}
+		rc = audio_aio_enable(audio);
+		audio->eos_rsp = 0;
+		audio->eos_flag = 0;
+		if (!rc) {
+			audio->enabled = 1;
+		} else {
+			audio->enabled = 0;
+			pr_err("%s: Audio Start procedure failed rc=%d\n",
+						__func__, rc);
+			break;
+		}
+		pr_debug("%s: AUDIO_START success enable[%d]\n",
+						__func__, audio->enabled);
+		if (audio->stopped == 1)
+			audio->stopped = 0;
+		break;
+	}
+	default:
+		pr_debug("%s: Unknown ioctl cmd = %d", __func__, cmd);
+		break;
+	}
+	return rc;
+}
+
+static long audio_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
+{
+	struct q6audio_aio *audio = file->private_data;
+	int rc = 0;
+
+	switch (cmd) {
+	case AUDIO_START: {
+		rc = audio_ioctl_shared(file, cmd, (void *)arg);
+		break;
+	}
+	case AUDIO_GET_G711_DEC_CONFIG: {
+		if (copy_to_user((void *)arg, audio->codec_cfg,
+			sizeof(struct msm_audio_g711_dec_config))) {
+			pr_err("%s: AUDIO_GET_G711_DEC_CONFIG failed\n",
+				__func__);
+			rc = -EFAULT;
+		}
+		break;
+	}
+	case AUDIO_SET_G711_DEC_CONFIG: {
+		if (copy_from_user(audio->codec_cfg, (void *)arg,
+			sizeof(struct msm_audio_g711_dec_config))) {
+			pr_err("%s: AUDIO_SET_G711_DEC_CONFIG failed\n",
+				__func__);
+			rc = -EFAULT;
+		}
+		break;
+	}
+	default: {
+		rc = audio->codec_ioctl(file, cmd, arg);
+		if (rc)
+			pr_err("%s: Failed in audio_aio_ioctl: %d cmd=%d\n",
+				__func__, rc, cmd);
+		break;
+	}
+	}
+	return  rc;
+}
+
+#ifdef CONFIG_COMPAT
+struct msm_audio_g711_dec_config_32 {
+	u32 sample_rate;
+};
+
+enum {
+	AUDIO_SET_G711_DEC_CONFIG_32 =  _IOW(AUDIO_IOCTL_MAGIC,
+	(AUDIO_MAX_COMMON_IOCTL_NUM+0), struct msm_audio_g711_dec_config_32),
+	AUDIO_GET_G711_DEC_CONFIG_32 =  _IOR(AUDIO_IOCTL_MAGIC,
+	(AUDIO_MAX_COMMON_IOCTL_NUM+1), struct msm_audio_g711_dec_config_32)
+};
+
+static long audio_compat_ioctl(struct file *file, unsigned int cmd,
+						unsigned long arg)
+{
+	struct q6audio_aio *audio = file->private_data;
+	int rc = 0;
+
+	switch (cmd) {
+	case AUDIO_START: {
+		rc = audio_ioctl_shared(file, cmd, (void *)arg);
+		break;
+	}
+	case AUDIO_GET_G711_DEC_CONFIG_32: {
+		struct msm_audio_g711_dec_config *g711_dec_config;
+		struct msm_audio_g711_dec_config_32 g711_dec_config_32;
+
+		memset(&g711_dec_config_32, 0, sizeof(g711_dec_config_32));
+
+		g711_dec_config =
+			(struct msm_audio_g711_dec_config *)audio->codec_cfg;
+		g711_dec_config_32.sample_rate = g711_dec_config->sample_rate;
+
+		if (copy_to_user((void *)arg, &g711_dec_config_32,
+			sizeof(g711_dec_config_32))) {
+			pr_err("%s: copy_to_user for AUDIO_GET_G711_DEC_CONFIG failed\n",
+				 __func__);
+			rc = -EFAULT;
+		}
+		break;
+	}
+	case AUDIO_SET_G711_DEC_CONFIG_32: {
+		struct msm_audio_g711_dec_config *g711_dec_config;
+		struct msm_audio_g711_dec_config_32 g711_dec_config_32;
+
+		memset(&g711_dec_config_32, 0, sizeof(g711_dec_config_32));
+
+		if (copy_from_user(&g711_dec_config_32, (void *)arg,
+			sizeof(g711_dec_config_32))) {
+			pr_err("%s: copy_from_user for AUDIO_SET_G711_DEC_CONFIG failed\n",
+				__func__);
+			rc = -EFAULT;
+			break;
+		}
+		g711_dec_config =
+			(struct msm_audio_g711_dec_config *)audio->codec_cfg;
+		g711_dec_config->sample_rate = g711_dec_config_32.sample_rate;
+
+		break;
+	}
+	default: {
+		rc = audio->codec_compat_ioctl(file, cmd, arg);
+		if (rc)
+			pr_err("%s: Failed in audio_aio_compat_ioctl: %d cmd=%d\n",
+				__func__, rc, cmd);
+		break;
+	}
+	}
+	return rc;
+}
+#else
+#define audio_compat_ioctl NULL
+#endif
+
+static int audio_open(struct inode *inode, struct file *file)
+{
+	struct q6audio_aio *audio = NULL;
+	int rc = 0;
+	/* 4 bytes represents decoder number, 1 byte for terminate string */
+	char name[sizeof "msm_g711_" + 5];
+
+	audio = kzalloc(sizeof(struct q6audio_aio), GFP_KERNEL);
+
+	if (!audio)
+		return -ENOMEM;
+	audio->codec_cfg = kzalloc(sizeof(struct msm_audio_g711_dec_config),
+					GFP_KERNEL);
+	if (!audio->codec_cfg) {
+		kfree(audio);
+		return -ENOMEM;
+	}
+
+	audio->pcm_cfg.buffer_size = PCM_BUFSZ_MIN;
+	audio->miscdevice = &audio_g711mlaw_misc;
+	audio->wakelock_voted = false;
+	audio->audio_ws_mgr = &audio_g711_ws_mgr;
+
+	init_waitqueue_head(&audio->event_wait);
+
+	audio->ac = q6asm_audio_client_alloc((app_cb) q6_audio_cb,
+					     (void *)audio);
+
+	if (!audio->ac) {
+		pr_err("%s: Could not allocate memory for audio client\n",
+					__func__);
+		kfree(audio->codec_cfg);
+		kfree(audio);
+		return -ENOMEM;
+	}
+	rc = audio_aio_open(audio, file);
+	if (rc < 0) {
+		pr_err("%s: audio_aio_open rc=%d\n",
+			__func__, rc);
+		goto fail;
+	}
+	/* open in T/NT mode */ /*foramt:G711_ALAW*/
+	if ((file->f_mode & FMODE_WRITE) && (file->f_mode & FMODE_READ)) {
+		rc = q6asm_open_read_write(audio->ac, FORMAT_LINEAR_PCM,
+					   FORMAT_G711_MLAW_FS);
+		if (rc < 0) {
+			pr_err("%s: NT mode Open failed rc=%d\n", __func__, rc);
+			goto fail;
+		}
+		audio->feedback = NON_TUNNEL_MODE;
+		/* open G711 decoder, expected frames is always 1*/
+		audio->buf_cfg.frames_per_buf = 0x01;
+		audio->buf_cfg.meta_info_enable = 0x01;
+	} else if ((file->f_mode & FMODE_WRITE) &&
+			!(file->f_mode & FMODE_READ)) {
+		rc = q6asm_open_write(audio->ac, FORMAT_G711_MLAW_FS);
+		if (rc < 0) {
+			pr_err("%s: T mode Open failed rc=%d\n", __func__, rc);
+			goto fail;
+		}
+		audio->feedback = TUNNEL_MODE;
+		audio->buf_cfg.meta_info_enable = 0x00;
+	} else {
+		pr_err("%s: %d mode is not supported\n", __func__,
+					file->f_mode);
+		rc = -EACCES;
+		goto fail;
+	}
+
+	snprintf(name, sizeof(name), "msm_g711_%04x", audio->ac->session);
+	audio->dentry = config_debugfs_create_file(name, (void *)audio);
+
+	if (IS_ERR_OR_NULL(audio->dentry))
+		pr_debug("%s: debugfs_create_file failed\n", __func__);
+	pr_debug("%s: g711dec success mode[%d]session[%d]\n", __func__,
+						audio->feedback,
+						audio->ac->session);
+	return rc;
+fail:
+	q6asm_audio_client_free(audio->ac);
+	kfree(audio->codec_cfg);
+	kfree(audio);
+	return rc;
+}
+
+static int g711_channel_map(u8 *channel_mapping, uint32_t channels)
+{
+	u8 *lchannel_mapping;
+
+	lchannel_mapping = channel_mapping;
+	pr_debug("%s: channels passed: %d\n", __func__, channels);
+	if (channels == 1)  {
+		lchannel_mapping[0] = PCM_CHANNEL_FC;
+	} else if (channels == 2) {
+		lchannel_mapping[0] = PCM_CHANNEL_FL;
+		lchannel_mapping[1] = PCM_CHANNEL_FR;
+	} else if (channels == 3) {
+		lchannel_mapping[0] = PCM_CHANNEL_FC;
+		lchannel_mapping[1] = PCM_CHANNEL_FL;
+		lchannel_mapping[2] = PCM_CHANNEL_FR;
+	} else if (channels == 4) {
+		lchannel_mapping[0] = PCM_CHANNEL_FC;
+		lchannel_mapping[1] = PCM_CHANNEL_FL;
+		lchannel_mapping[2] = PCM_CHANNEL_FR;
+		lchannel_mapping[3] = PCM_CHANNEL_CS;
+	} else if (channels == 5) {
+		lchannel_mapping[0] = PCM_CHANNEL_FC;
+		lchannel_mapping[1] = PCM_CHANNEL_FL;
+		lchannel_mapping[2] = PCM_CHANNEL_FR;
+		lchannel_mapping[3] = PCM_CHANNEL_LS;
+		lchannel_mapping[4] = PCM_CHANNEL_RS;
+	} else if (channels == 6) {
+		lchannel_mapping[0] = PCM_CHANNEL_FC;
+		lchannel_mapping[1] = PCM_CHANNEL_FL;
+		lchannel_mapping[2] = PCM_CHANNEL_FR;
+		lchannel_mapping[3] = PCM_CHANNEL_LS;
+		lchannel_mapping[4] = PCM_CHANNEL_RS;
+		lchannel_mapping[5] = PCM_CHANNEL_LFE;
+	} else if (channels == 7) {
+		lchannel_mapping[0] = PCM_CHANNEL_FC;
+		lchannel_mapping[1] = PCM_CHANNEL_FL;
+		lchannel_mapping[2] = PCM_CHANNEL_FR;
+		lchannel_mapping[3] = PCM_CHANNEL_LS;
+		lchannel_mapping[4] = PCM_CHANNEL_RS;
+		lchannel_mapping[5] = PCM_CHANNEL_CS;
+		lchannel_mapping[6] = PCM_CHANNEL_LFE;
+	} else if (channels == 8) {
+		lchannel_mapping[0] = PCM_CHANNEL_FC;
+		lchannel_mapping[1] = PCM_CHANNEL_FLC;
+		lchannel_mapping[2] = PCM_CHANNEL_FRC;
+		lchannel_mapping[3] = PCM_CHANNEL_FL;
+		lchannel_mapping[4] = PCM_CHANNEL_FR;
+		lchannel_mapping[5] = PCM_CHANNEL_LS;
+		lchannel_mapping[6] = PCM_CHANNEL_RS;
+		lchannel_mapping[7] = PCM_CHANNEL_LFE;
+	} else {
+		pr_err("%s: ERROR.unsupported num_ch = %u\n",
+				__func__, channels);
+		return -EINVAL;
+	}
+	return 0;
+}
+
+static const struct file_operations audio_g711_fops = {
+	.owner = THIS_MODULE,
+	.open = audio_open,
+	.release = audio_aio_release,
+	.unlocked_ioctl = audio_ioctl,
+	.compat_ioctl = audio_compat_ioctl,
+	.fsync = audio_aio_fsync,
+};
+
+static struct miscdevice audio_g711mlaw_misc = {
+	.minor = MISC_DYNAMIC_MINOR,
+	.name = "msm_g711mlaw",
+	.fops = &audio_g711_fops,
+};
+
+static int __init audio_g711mlaw_init(void)
+{
+	int ret = misc_register(&audio_g711mlaw_misc);
+
+	if (ret == 0)
+		device_init_wakeup(audio_g711mlaw_misc.this_device, true);
+	audio_g711_ws_mgr.ref_cnt = 0;
+	mutex_init(&audio_g711_ws_mgr.ws_lock);
+
+	return ret;
+}
+
+static void __exit audio_g711mlaw_exit(void)
+{
+	misc_deregister(&audio_g711mlaw_misc);
+	mutex_destroy(&audio_g711_ws_mgr.ws_lock);
+}
+
+device_initcall(audio_g711mlaw_init);
+__exitcall(audio_g711mlaw_exit);