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Commit 4fa19da7 authored by Shalini Manjunatha's avatar Shalini Manjunatha Committed by Gerrit - the friendly Code Review server
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msm: Add back voice svc driver 



Add voice svc driver back in kernel 4.9 to help userspace
ims module build which has dependency on it for Kai device Android M
bring up with kernel 4.9

voice svc driver build is put under conditional check, so that
it is included only for required target of Kai

Change-Id: I6d801ddb0bc20d05fb4aadf488e560b39ab931bd
Signed-off-by: default avatarShalini Manjunatha <shalma@codeaurora.org>
parent 680e67d0

asoc/Kbuild

+5 −0
Original line number Diff line number Diff line
@@ -126,6 +126,11 @@ ifdef CONFIG_SND_SOC_MSM8909 
	MACHINE_INT_OBJS += msm8952.o

endif



# For MSM8909 only add voice svc driver

ifdef CONFIG_SND_SOC_MSM8909

	PLATFORM_OBJS += voice_svc.o

endif



# for SDM450 external codec sound card driver

ifdef CONFIG_SND_SOC_EXT_CODEC_SDM450

	MACHINE_EXT_OBJS += msm8952-slimbus.o

asoc/platform_init.c

+7 −1
Original line number Diff line number Diff line 
/*

Copyright (c) 2017, The Linux Foundation. All rights reserved.

Copyright (c) 2017, 2020 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
@@ -36,6 +36,9 @@ static int __init audio_platform_init(void) 
	msm_pcm_voice_init();

	msm_pcm_voip_init();

	msm_transcode_loopback_init();

#ifdef CONFIG_SND_SOC_MSM8909

	voice_svc_init();

#endif



	return 0;

}
@@ -60,6 +63,9 @@ static void audio_platform_exit(void) 
	msm_dai_q6_hdmi_exit();

	msm_fe_dai_exit();

	msm_compress_dsp_exit();

#ifdef CONFIG_SND_SOC_MSM8909

	voice_svc_exit();

#endif

}



module_init(audio_platform_init);

asoc/platform_init.h

+7 −1
Original line number Diff line number Diff line 
/*

Copyright (c) 2017, The Linux Foundation. All rights reserved.

Copyright (c) 2017, 2020 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
@@ -33,6 +33,9 @@ int msm_pcm_voice_init(void); 
int msm_pcm_voip_init(void);

int msm_transcode_loopback_init(void);

int msm_cpe_lsm_init(void);

#ifdef CONFIG_SND_SOC_MSM8909

int __init voice_svc_init(void);

#endif



void msm_cpe_lsm_exit(void);

void msm_transcode_loopback_exit(void);
@@ -53,6 +56,9 @@ void msm_dai_q6_exit(void); 
void msm_dai_q6_hdmi_exit(void);

void msm_fe_dai_exit(void);

void msm_compress_dsp_exit(void);

#ifdef CONFIG_SND_SOC_MSM8909

void __exit voice_svc_exit(void);

#endif



#endif

asoc/voice_svc.c

0 → 100644
+774 −0
Original line number Diff line number Diff line 
/* Copyright (c) 2014-2016, 2020 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/kernel.h>

#include <linux/errno.h>

#include <linux/fs.h>

#include <linux/uaccess.h>

#include <linux/slab.h>

#include <linux/platform_device.h>

#include <linux/cdev.h>

#include <ipc/apr_tal.h>

#include <ipc/apr.h>

#include <sound/voice_svc.h>



#define MINOR_NUMBER 1

#define APR_MAX_RESPONSE 10

#define TIMEOUT_MS 1000



#define MAX(a, b) ((a) >= (b) ? (a) : (b))



struct voice_svc_device {

	struct cdev *cdev;

	struct device *dev;

	int major;

};



struct voice_svc_prvt {

	void *apr_q6_mvm;

	void *apr_q6_cvs;

	uint16_t response_count;

	struct list_head response_queue;

	wait_queue_head_t response_wait;

	spinlock_t response_lock;

};



struct apr_data {

	struct apr_hdr hdr;

	__u8 payload[0];

} __packed;



struct apr_response_list {

	struct list_head list;

	struct voice_svc_cmd_response resp;

};



static struct voice_svc_device *voice_svc_dev;

static struct class *voice_svc_class;

static bool reg_dummy_sess;

static void *dummy_q6_mvm;

static void *dummy_q6_cvs;

dev_t device_num;



static int voice_svc_dummy_reg(void);

static int32_t qdsp_dummy_apr_callback(struct apr_client_data *data,

					void *priv);



static int32_t qdsp_apr_callback(struct apr_client_data *data, void *priv)

{

	struct voice_svc_prvt *prtd;

	struct apr_response_list *response_list;

	unsigned long spin_flags;



	if ((data == NULL) || (priv == NULL)) {

		pr_err("%s: data or priv is NULL\n", __func__);



		return -EINVAL;

	}



	prtd = (struct voice_svc_prvt *)priv;

	if (prtd == NULL) {

		pr_err("%s: private data is NULL\n", __func__);



		return -EINVAL;

	}



	pr_debug("%s: data->opcode %x\n", __func__,

		 data->opcode);



	if (data->opcode == RESET_EVENTS) {

		if (data->reset_proc == APR_DEST_QDSP6) {

			pr_debug("%s: Received ADSP reset event\n", __func__);



			if (prtd->apr_q6_mvm != NULL) {

				apr_reset(prtd->apr_q6_mvm);

				prtd->apr_q6_mvm = NULL;

			}



			if (prtd->apr_q6_cvs != NULL) {

				apr_reset(prtd->apr_q6_cvs);

				prtd->apr_q6_cvs = NULL;

			}

		} else if (data->reset_proc == APR_DEST_MODEM) {

			pr_debug("%s: Received Modem reset event\n", __func__);

		}

		/* Set the remaining member variables to default values

			for RESET_EVENTS */

		data->payload_size = 0;

		data->payload = NULL;

		data->src_port = 0;

		data->dest_port = 0;

		data->token = 0;

	}



	spin_lock_irqsave(&prtd->response_lock, spin_flags);



	if (prtd->response_count < APR_MAX_RESPONSE) {

		response_list = kmalloc(sizeof(struct apr_response_list) +

					data->payload_size, GFP_ATOMIC);

		if (response_list == NULL) {

			pr_err("%s: kmalloc failed\n", __func__);



			spin_unlock_irqrestore(&prtd->response_lock,

					       spin_flags);

			return -ENOMEM;

		}



		response_list->resp.src_port = data->src_port;



		/* Reverting the bit manipulation done in voice_svc_update_hdr

		 * to the src_port which is returned to us as dest_port.

		 */

		response_list->resp.dest_port = ((data->dest_port) >> 8);

		response_list->resp.token = data->token;

		response_list->resp.opcode = data->opcode;

		response_list->resp.payload_size = data->payload_size;

		if (data->payload != NULL && data->payload_size > 0) {

			memcpy(response_list->resp.payload, data->payload,

			       data->payload_size);

		}



		list_add_tail(&response_list->list, &prtd->response_queue);

		prtd->response_count++;

		spin_unlock_irqrestore(&prtd->response_lock, spin_flags);



		wake_up(&prtd->response_wait);

	} else {

		spin_unlock_irqrestore(&prtd->response_lock, spin_flags);

		pr_err("%s: Response dropped since the queue is full\n",

		       __func__);

	}



	return 0;

}



static int32_t qdsp_dummy_apr_callback(struct apr_client_data *data, void *priv)

{

	/* Do Nothing */

	return 0;

}



static void voice_svc_update_hdr(struct voice_svc_cmd_request *apr_req_data,

				 struct apr_data *aprdata)

{



	aprdata->hdr.hdr_field = APR_HDR_FIELD(APR_MSG_TYPE_SEQ_CMD,

				       APR_HDR_LEN(sizeof(struct apr_hdr)),

				       APR_PKT_VER);

	/* Bit manipulation is done on src_port so that a unique ID is sent.

	 * This manipulation can be used in the future where the same service

	 * is tried to open multiple times with the same src_port. At that

	 * time 0x0001 can be replaced with other values depending on the

	 * count.

	 */

	aprdata->hdr.src_port = ((apr_req_data->src_port) << 8 | 0x0001);

	aprdata->hdr.dest_port = apr_req_data->dest_port;

	aprdata->hdr.token = apr_req_data->token;

	aprdata->hdr.opcode = apr_req_data->opcode;

	aprdata->hdr.pkt_size  = APR_PKT_SIZE(APR_HDR_SIZE,

					apr_req_data->payload_size);

	memcpy(aprdata->payload, apr_req_data->payload,

	       apr_req_data->payload_size);

}



static int voice_svc_send_req(struct voice_svc_cmd_request *apr_request,

			      struct voice_svc_prvt *prtd)

{

	int ret = 0;

	void *apr_handle = NULL;

	struct apr_data *aprdata = NULL;

	uint32_t user_payload_size;

	uint32_t payload_size;



	pr_debug("%s\n", __func__);



	if (apr_request == NULL) {

		pr_err("%s: apr_request is NULL\n", __func__);



		ret = -EINVAL;

		goto done;

	}



	user_payload_size = apr_request->payload_size;

	payload_size = sizeof(struct apr_data) + user_payload_size;



	if (payload_size <= user_payload_size) {

		pr_err("%s: invalid payload size ( 0x%x ).\n",

			__func__, user_payload_size);

		ret = -EINVAL;

		goto done;

	} else {

		aprdata = kmalloc(payload_size, GFP_KERNEL);

		if (aprdata == NULL) {

			ret = -ENOMEM;

			goto done;

		}

	}



	voice_svc_update_hdr(apr_request, aprdata);



	if (!strcmp(apr_request->svc_name, VOICE_SVC_CVS_STR)) {

		apr_handle = prtd->apr_q6_cvs;

	} else if (!strcmp(apr_request->svc_name, VOICE_SVC_MVM_STR)) {

		apr_handle = prtd->apr_q6_mvm;

	} else {

		pr_err("%s: Invalid service %s\n", __func__,

			apr_request->svc_name);



		ret = -EINVAL;

		goto done;

	}



	ret = apr_send_pkt(apr_handle, (uint32_t *)aprdata);



	if (ret < 0) {

		pr_err("%s: Fail in sending request %d\n",

			__func__, ret);

		ret = -EINVAL;

	} else {

		pr_debug("%s: apr packet sent successfully %d\n",

			 __func__, ret);

		ret = 0;

	}



done:

	kfree(aprdata);

	return ret;

}

static int voice_svc_reg(char *svc, uint32_t src_port,

			 struct voice_svc_prvt *prtd, void **handle)

{

	int ret = 0;



	pr_debug("%s\n", __func__);



	if (handle == NULL) {

		pr_err("%s: handle is NULL\n", __func__);

		ret = -EINVAL;

		goto done;

	}



	if (*handle != NULL) {

		pr_err("%s: svc handle not NULL\n", __func__);

		ret = -EINVAL;

		goto done;

	}



	if (src_port == (APR_MAX_PORTS - 1)) {

		pr_err("%s: SRC port reserved for dummy session\n", __func__);

		pr_err("%s: Unable to register %s\n", __func__, svc);

		ret = -EINVAL;

		goto done;

	}



	*handle = apr_register("ADSP",

			       svc, qdsp_apr_callback,

			       ((src_port) << 8 | 0x0001),

			       prtd);



	if (*handle == NULL) {

		pr_err("%s: Unable to register %s\n",

		       __func__, svc);



		ret = -EFAULT;

		goto done;

	}

	pr_debug("%s: Register %s successful\n",

		__func__, svc);

done:

	return ret;

}



static int voice_svc_dereg(char *svc, void **handle)

{

	int ret = 0;



	pr_debug("%s\n", __func__);



	if (handle == NULL) {

		pr_err("%s: handle is NULL\n", __func__);

		ret = -EINVAL;

		goto done;

	}



	if (*handle == NULL) {

		pr_err("%s: svc handle is NULL\n", __func__);

		ret = -EINVAL;

		goto done;

	}



	ret = apr_deregister(*handle);

	if (ret) {

		pr_err("%s: Unable to deregister service %s; error: %d\n",

		       __func__, svc, ret);



		goto done;

	}

	*handle = NULL;

	pr_debug("%s: deregister %s successful\n", __func__, svc);



done:

	return ret;

}



static int process_reg_cmd(struct voice_svc_register *apr_reg_svc,

			   struct voice_svc_prvt *prtd)

{

	int ret = 0;

	char *svc = NULL;

	void **handle = NULL;



	pr_debug("%s\n", __func__);



	if (!strcmp(apr_reg_svc->svc_name, VOICE_SVC_MVM_STR)) {

		svc = VOICE_SVC_MVM_STR;

		handle = &prtd->apr_q6_mvm;

	} else if (!strcmp(apr_reg_svc->svc_name, VOICE_SVC_CVS_STR)) {

		svc = VOICE_SVC_CVS_STR;

		handle = &prtd->apr_q6_cvs;

	} else {

		pr_err("%s: Invalid Service: %s\n", __func__,

		       apr_reg_svc->svc_name);

		ret = -EINVAL;

		goto done;

	}



	if (apr_reg_svc->reg_flag) {

		ret = voice_svc_reg(svc, apr_reg_svc->src_port, prtd,

				    handle);

	} else if (!apr_reg_svc->reg_flag) {

		ret = voice_svc_dereg(svc, handle);

	}



done:

	return ret;

}



static ssize_t voice_svc_write(struct file *file, const char __user *buf,

			       size_t count, loff_t *ppos)

{

	int ret = 0;

	struct voice_svc_prvt *prtd;

	struct voice_svc_write_msg *data = NULL;

	uint32_t cmd;



	pr_debug("%s\n", __func__);



	data = kmalloc(count, GFP_KERNEL);



	if (data == NULL) {

		pr_err("%s: data kmalloc failed.\n", __func__);



		ret = -ENOMEM;

		goto done;

	}



	ret = copy_from_user(data, buf, count);

	if (ret) {

		pr_err("%s: copy_from_user failed %d\n", __func__, ret);



		ret = -EPERM;

		goto done;

	}



	cmd = data->msg_type;

	prtd = (struct voice_svc_prvt *)file->private_data;

	if (prtd == NULL) {

		pr_err("%s: prtd is NULL\n", __func__);



		ret = -EINVAL;

		goto done;

	}



	switch (cmd) {

	case MSG_REGISTER:

		if (count  >=

				(sizeof(struct voice_svc_register) +

				sizeof(*data))) {

			ret = process_reg_cmd(

			(struct voice_svc_register *)data->payload, prtd);

			if (!ret)

				ret = count;

		} else {

			pr_err("%s: invalid payload size\n", __func__);

			ret = -EINVAL;

			goto done;

		}

		break;

	case MSG_REQUEST:

	if (count >= (sizeof(struct voice_svc_cmd_request) +

					sizeof(*data))) {

		ret = voice_svc_send_req(

			(struct voice_svc_cmd_request *)data->payload, prtd);

		if (!ret)

			ret = count;

	} else {

		pr_err("%s: invalid payload size\n", __func__);

		ret = -EINVAL;

		goto done;

	}

		break;

	default:

		pr_debug("%s: Invalid command: %u\n", __func__, cmd);

		ret = -EINVAL;

	}



done:

	kfree(data);

	return ret;

}



static ssize_t voice_svc_read(struct file *file, char __user *arg,

			      size_t count, loff_t *ppos)

{

	int ret = 0;

	struct voice_svc_prvt *prtd;

	struct apr_response_list *resp;

	unsigned long spin_flags;

	int size;



	pr_debug("%s\n", __func__);



	prtd = (struct voice_svc_prvt *)file->private_data;

	if (prtd == NULL) {

		pr_err("%s: prtd is NULL\n", __func__);



		ret = -EINVAL;

		goto done;

	}



	spin_lock_irqsave(&prtd->response_lock, spin_flags);



	if (list_empty(&prtd->response_queue)) {

		spin_unlock_irqrestore(&prtd->response_lock, spin_flags);

		pr_debug("%s: wait for a response\n", __func__);



		ret = wait_event_interruptible_timeout(prtd->response_wait,

					!list_empty(&prtd->response_queue),

					msecs_to_jiffies(TIMEOUT_MS));

		if (ret == 0) {

			pr_debug("%s: Read timeout\n", __func__);



			ret = -ETIMEDOUT;

			goto done;

		} else if (ret > 0 && !list_empty(&prtd->response_queue)) {

			pr_debug("%s: Interrupt recieved for response\n",

				 __func__);

		} else if (ret < 0) {

			pr_debug("%s: Interrupted by SIGNAL %d\n",

				 __func__, ret);



			goto done;

		}



		spin_lock_irqsave(&prtd->response_lock, spin_flags);

	}



	resp = list_first_entry(&prtd->response_queue,

				struct apr_response_list, list);



	spin_unlock_irqrestore(&prtd->response_lock, spin_flags);



	size = resp->resp.payload_size +

	       sizeof(struct voice_svc_cmd_response);



	if (count < size) {

		pr_err("%s: Invalid payload size %zd, %d\n",

		       __func__, count, size);



		ret = -ENOMEM;

		goto done;

	}



	if (!access_ok(VERIFY_WRITE, arg, size)) {

		pr_err("%s: Access denied to write\n",

		       __func__);



		ret = -EPERM;

		goto done;

	}



	ret = copy_to_user(arg, &resp->resp,

			 sizeof(struct voice_svc_cmd_response) +

			 resp->resp.payload_size);

	if (ret) {

		pr_err("%s: copy_to_user failed %d\n", __func__, ret);



		ret = -EPERM;

		goto done;

	}



	spin_lock_irqsave(&prtd->response_lock, spin_flags);



	list_del(&resp->list);

	prtd->response_count--;

	kfree(resp);



	spin_unlock_irqrestore(&prtd->response_lock,

				spin_flags);



	ret = count;



done:

	return ret;

}



static int voice_svc_dummy_reg()

{

	uint32_t src_port = APR_MAX_PORTS - 1;



	pr_debug("%s\n", __func__);

	dummy_q6_mvm = apr_register("ADSP", "MVM",

				qdsp_dummy_apr_callback,

				src_port,

				NULL);

	if (dummy_q6_mvm == NULL) {

		pr_err("%s: Unable to register dummy MVM\n", __func__);

		goto err;

	}



	dummy_q6_cvs = apr_register("ADSP", "CVS",

				qdsp_dummy_apr_callback,

				src_port,

				NULL);

	if (dummy_q6_cvs == NULL) {

		pr_err("%s: Unable to register dummy CVS\n", __func__);

		goto err;

	}

	return 0;

err:

	if (dummy_q6_mvm != NULL) {

		apr_deregister(dummy_q6_mvm);

		dummy_q6_mvm = NULL;

	}

	return -EINVAL;

}



static int voice_svc_open(struct inode *inode, struct file *file)

{

	struct voice_svc_prvt *prtd = NULL;



	pr_debug("%s\n", __func__);



	prtd = kmalloc(sizeof(struct voice_svc_prvt), GFP_KERNEL);



	if (prtd == NULL) {

		pr_err("%s: kmalloc failed\n", __func__);

		return -ENOMEM;

	}



	memset(prtd, 0, sizeof(struct voice_svc_prvt));

	prtd->apr_q6_cvs = NULL;

	prtd->apr_q6_mvm = NULL;

	prtd->response_count = 0;

	INIT_LIST_HEAD(&prtd->response_queue);

	init_waitqueue_head(&prtd->response_wait);

	spin_lock_init(&prtd->response_lock);

	file->private_data = (void *)prtd;



	/* Current APR implementation doesn't support session based

	 * multiple service registrations. The apr_deregister()

	 * function sets the destination and client IDs to zero, if

	 * deregister is called for a single service instance.

	 * To avoid this, register for additional services.

	 */

	if (!reg_dummy_sess) {

		voice_svc_dummy_reg();

		reg_dummy_sess = 1;

	}

	return 0;

}



static int voice_svc_release(struct inode *inode, struct file *file)

{

	int ret = 0;

	struct apr_response_list *resp = NULL;

	unsigned long spin_flags;

	struct voice_svc_prvt *prtd = NULL;

	char *svc_name = NULL;

	void **handle = NULL;



	pr_debug("%s\n", __func__);



	prtd = (struct voice_svc_prvt *)file->private_data;

	if (prtd == NULL) {

		pr_err("%s: prtd is NULL\n", __func__);



		ret = -EINVAL;

		goto done;

	}



	if (prtd->apr_q6_cvs != NULL) {

		svc_name = VOICE_SVC_MVM_STR;

		handle = &prtd->apr_q6_cvs;

		ret = voice_svc_dereg(svc_name, handle);

		if (ret)

			pr_err("%s: Failed to dereg CVS %d\n", __func__, ret);

	}



	if (prtd->apr_q6_mvm != NULL) {

		svc_name = VOICE_SVC_MVM_STR;

		handle = &prtd->apr_q6_mvm;

		ret = voice_svc_dereg(svc_name, handle);

		if (ret)

			pr_err("%s: Failed to dereg MVM %d\n", __func__, ret);

	}



	spin_lock_irqsave(&prtd->response_lock, spin_flags);



	while (!list_empty(&prtd->response_queue)) {

		pr_debug("%s: Remove item from response queue\n", __func__);



		resp = list_first_entry(&prtd->response_queue,

					struct apr_response_list, list);

		list_del(&resp->list);

		prtd->response_count--;

		kfree(resp);

	}



	spin_unlock_irqrestore(&prtd->response_lock, spin_flags);



	kfree(file->private_data);

	file->private_data = NULL;



done:

	return ret;

}



static const struct file_operations voice_svc_fops = {

	.owner =                THIS_MODULE,

	.open =                 voice_svc_open,

	.read =                 voice_svc_read,

	.write =                voice_svc_write,

	.release =              voice_svc_release,

};





static int voice_svc_probe(struct platform_device *pdev)

{

	int ret = 0;



	pr_debug("%s\n", __func__);



	voice_svc_dev = devm_kzalloc(&pdev->dev,

				  sizeof(struct voice_svc_device), GFP_KERNEL);

	if (!voice_svc_dev) {

		pr_err("%s: kzalloc failed\n", __func__);

		ret = -ENOMEM;

		goto done;

	}



	ret = alloc_chrdev_region(&device_num, 0, MINOR_NUMBER,

				  VOICE_SVC_DRIVER_NAME);

	if (ret) {

		pr_err("%s: Failed to alloc chrdev\n", __func__);

		ret = -ENODEV;

		goto chrdev_err;

	}



	voice_svc_dev->major = MAJOR(device_num);

	voice_svc_class = class_create(THIS_MODULE, VOICE_SVC_DRIVER_NAME);

	if (IS_ERR(voice_svc_class)) {

		ret = PTR_ERR(voice_svc_class);

		pr_err("%s: Failed to create class; err = %d\n", __func__,

			ret);

		goto class_err;

	}



	voice_svc_dev->dev = device_create(voice_svc_class, NULL, device_num,

					   NULL, VOICE_SVC_DRIVER_NAME);

	if (IS_ERR(voice_svc_dev->dev)) {

		ret = PTR_ERR(voice_svc_dev->dev);

		pr_err("%s: Failed to create device; err = %d\n", __func__,

			ret);

		goto dev_err;

	}



	voice_svc_dev->cdev = cdev_alloc();

	if (!voice_svc_dev->cdev) {

		pr_err("%s: Failed to alloc cdev\n", __func__);

		ret = -ENOMEM;

		goto cdev_alloc_err;

	}



	cdev_init(voice_svc_dev->cdev, &voice_svc_fops);

	ret = cdev_add(voice_svc_dev->cdev, device_num, MINOR_NUMBER);

	if (ret) {

		pr_err("%s: Failed to register chrdev; err = %d\n", __func__,

			ret);

		goto add_err;

	}

	pr_debug("%s: Device created\n", __func__);

	goto done;



add_err:

	cdev_del(voice_svc_dev->cdev);

cdev_alloc_err:

	device_destroy(voice_svc_class, device_num);

dev_err:

	class_destroy(voice_svc_class);

class_err:

	unregister_chrdev_region(0, MINOR_NUMBER);

chrdev_err:

	kfree(voice_svc_dev);

done:

	return ret;

}



static int voice_svc_remove(struct platform_device *pdev)

{

	pr_debug("%s\n", __func__);



	cdev_del(voice_svc_dev->cdev);

	kfree(voice_svc_dev->cdev);

	device_destroy(voice_svc_class, device_num);

	class_destroy(voice_svc_class);

	unregister_chrdev_region(0, MINOR_NUMBER);

	kfree(voice_svc_dev);



	return 0;

}



static struct of_device_id voice_svc_of_match[] = {

	{.compatible = "qcom,msm-voice-svc"},

	{ }

};

MODULE_DEVICE_TABLE(of, voice_svc_of_match);



static struct platform_driver voice_svc_driver = {

	.probe          = voice_svc_probe,

	.remove         = voice_svc_remove,

	.driver         = {

		.name   = "msm-voice-svc",

		.owner  = THIS_MODULE,

		.of_match_table = voice_svc_of_match,

	},

};



int __init voice_svc_init(void)

{

	pr_debug("%s\n", __func__);



	return platform_driver_register(&voice_svc_driver);

}



void __exit voice_svc_exit(void)

{

	pr_debug("%s\n", __func__);



	platform_driver_unregister(&voice_svc_driver);

}



MODULE_DESCRIPTION("Soc QDSP6v2 Voice Service driver");

MODULE_LICENSE("GPL v2");

include/uapi/sound/voice_svc.h

0 → 100644
+47 −0
Original line number Diff line number Diff line 
#ifndef __VOICE_SVC_H__

#define __VOICE_SVC_H__



#include <linux/types.h>

#include <linux/ioctl.h>



#define VOICE_SVC_DRIVER_NAME "voice_svc"



#define VOICE_SVC_MVM_STR "MVM"

#define VOICE_SVC_CVS_STR "CVS"

#define MAX_APR_SERVICE_NAME_LEN  64



#define MSG_REGISTER 0x1

#define MSG_REQUEST  0x2

#define MSG_RESPONSE 0x3



struct voice_svc_write_msg {

	__u32 msg_type;

	__u8 payload[0];

};



struct voice_svc_register {

	char svc_name[MAX_APR_SERVICE_NAME_LEN];

	__u32 src_port;

	__u8 reg_flag;

};



struct voice_svc_cmd_response {

	__u32 src_port;

	__u32 dest_port;

	__u32 token;

	__u32 opcode;

	__u32 payload_size;

	__u8 payload[0];

};



struct voice_svc_cmd_request {

	char svc_name[MAX_APR_SERVICE_NAME_LEN];

	__u32 src_port;

	__u32 dest_port;

	__u32 token;

	__u32 opcode;

	__u32 payload_size;

	__u8 payload[0];

};



#endif