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Commit f88175ac authored by Konstantin Dorfman's avatar Konstantin Dorfman
Browse files

soc: qcom: spcom: add kernel-pil support for SPU 



Add an API to userspace that supports SPU PIL.
This API restart SPU.

Change-Id: I934dec53a931e3b97092892b7f1f80599355f961
Signed-off-by: default avatarKineret Berger <kberger@codeaurora.org>
Signed-off-by: default avatarKonstantin Dorfman <kdorfman@codeaurora.org>
parent b7bafeea

drivers/soc/qcom/spcom.c

+28 −1
Original line number Diff line number Diff line
@@ -68,6 +68,7 @@ 
#include <linux/atomic.h>

#include <linux/list.h>

#include <uapi/linux/spcom.h>

#include <soc/qcom/subsystem_restart.h>



/**

 * Request buffer size.
@@ -521,6 +522,28 @@ static int spcom_handle_create_channel_command(void *cmd_buf, int cmd_size) 
	return ret;

}



/**

 * spcom_handle_restart_sp_command() - Handle Restart SP command from

 * user space.

 *

 * Return: 0 on successful operation, negative value otherwise.

 */

static int spcom_handle_restart_sp_command(void)

{

	void *subsystem_get_retval = NULL;



	pr_err("restart - PIL FW loading process initiated\n");



	subsystem_get_retval = subsystem_get("spss");

	if (!subsystem_get_retval) {

		pr_err("restart - unable to trigger PIL process for FW loading\n");

		return -EINVAL;

	}



	pr_err("restart - PIL FW loading process is complete\n");

	return 0;

}



/**

 * spcom_handle_send_command() - Handle send request/response from user space.

 *
@@ -981,7 +1004,8 @@ static int spcom_handle_write(struct spcom_channel *ch, 


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



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

	if (!ch && cmd_id != SPCOM_CMD_CREATE_CHANNEL

			&& cmd_id != SPCOM_CMD_RESTART_SP) {

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

		return -EINVAL;

	}
@@ -1002,6 +1026,9 @@ static int spcom_handle_write(struct spcom_channel *ch, 
	case SPCOM_CMD_CREATE_CHANNEL:

		ret = spcom_handle_create_channel_command(buf, buf_size);

		break;

	case SPCOM_CMD_RESTART_SP:

		ret = spcom_handle_restart_sp_command();

		break;

	default:

		pr_err("Invalid Command Id [0x%x].\n", (int) cmd->cmd_id);

		ret = -EINVAL;

include/uapi/linux/spcom.h

+3 −0
Original line number Diff line number Diff line
@@ -57,6 +57,9 @@ enum spcom_cmd_id { 
	SPCOM_CMD_UNLOCK_ION_BUF = 0x554C434B, /* "ULCK" = 0x4C4F434B */

	SPCOM_CMD_FSSR		= 0x46535352, /* "FSSR" = 0x46535352 */

	SPCOM_CMD_CREATE_CHANNEL = 0x43524554, /* "CRET" = 0x43524554 */

#define SPCOM_CMD_RESTART_SP \

	SPCOM_CMD_RESTART_SP

	SPCOM_CMD_RESTART_SP    = 0x52535452, /* "RSTR" = 0x52535452 */

};



/*