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Commit 59268be8 authored by Konstantin Dorfman's avatar Konstantin Dorfman Committed by Gerrit - the friendly Code Review server
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soc: qcom: spcom: create control channel 



For commands that don't required SPU communication: is-link-up and
create channel, instead of using sp_kernel channel (the one used for
application loading) control channel /dev/spcom used.

Change-Id: I4d6abd83d77f3b1a3d277dbfec076faa0cbc72af
Signed-off-by: default avatarKonstantin Dorfman <kdorfman@codeaurora.org>
parent 9fed2226

drivers/soc/qcom/spcom.c

+16 −7
Original line number Diff line number Diff line 
/*

 * Copyright (c) 2015-2017, The Linux Foundation. All rights reserved.

 * Copyright (c) 2015-2018, 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
@@ -374,7 +374,7 @@ static void spcom_link_state_notif_cb(struct glink_link_state_cb_info *cb_info, 


	switch (cb_info->link_state) {

	case GLINK_LINK_STATE_UP:

		pr_info("GLINK_LINK_STATE_UP.\n");

		pr_debug("GLINK_LINK_STATE_UP.\n");

		spcom_create_predefined_channels_chardev();

		break;

	case GLINK_LINK_STATE_DOWN:
@@ -1170,7 +1170,7 @@ struct spcom_client *spcom_register_client(struct spcom_client_info *info) 
		kfree(client);

		client = NULL;

	} else {

		pr_info("remote side connect to channel [%s].\n", name);

		pr_debug("remote side connect to channel [%s].\n", name);

	}



	return client;
@@ -2010,6 +2010,11 @@ static int spcom_handle_write(struct spcom_channel *ch, 


	pr_debug("cmd_id [0x%x] cmd_name [%s].\n", cmd_id, cmd_name);



	if (!ch && cmd_id != SPCOM_CMD_CREATE_CHANNEL) {

		pr_err("channel context is null\n");

		return -EINVAL;

	}



	switch (cmd_id) {

	case SPCOM_CMD_SEND:

		ret = spcom_handle_send_command(ch, buf, buf_size);
@@ -2342,8 +2347,12 @@ static ssize_t spcom_device_write(struct file *filp, 


	ch = filp->private_data;

	if (!ch) {

		pr_err("invalid ch pointer, command not allowed.\n");

		if (strcmp(name, DEVICE_NAME) == 0) {

			pr_debug("control device - no channel context.\n");

		} else {

			pr_err("NULL ch pointer, command not allowed.\n");

			return -EINVAL;

		}

	} else {

		/* Check if remote side connect */

		if (!spcom_is_channel_connected(ch)) {
@@ -2784,7 +2793,7 @@ static int spcom_probe(struct platform_device *pdev) 
		goto fail_ion_client;

	}



	pr_info("Driver Initialization ok.\n");

	pr_debug("Driver Initialization ok.\n");



	return 0;
@@ -2821,7 +2830,7 @@ static int __init spcom_init(void) 
{

	int ret;



	pr_info("spcom driver version 1.3 28-Dec-2017.\n");

	pr_debug("spcom driver version 1.4 30-Apr-2018.\n");



	ret = platform_driver_register(&spcom_driver);

	if (ret)