Commit 110e6e02 authored by M Chetan Kumar's avatar M Chetan Kumar Committed by David S. Miller
Browse files

net: iosm: uevent support 



Report modem status via uevent.

Signed-off-by: default avatarM Chetan Kumar <m.chetan.kumar@intel.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 64516f63

drivers/net/wwan/iosm/iosm_ipc_uevent.c

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// SPDX-License-Identifier: GPL-2.0-only

/*

 * Copyright (C) 2020-21 Intel Corporation.

 */



#include <linux/device.h>

#include <linux/kobject.h>

#include <linux/slab.h>



#include "iosm_ipc_uevent.h"



/* Update the uevent in work queue context */

static void ipc_uevent_work(struct work_struct *data)

{

	struct ipc_uevent_info *info;

	char *envp[2] = { NULL, NULL };



	info = container_of(data, struct ipc_uevent_info, work);



	envp[0] = info->uevent;



	if (kobject_uevent_env(&info->dev->kobj, KOBJ_CHANGE, envp))

		pr_err("uevent %s failed to sent", info->uevent);



	kfree(info);

}



void ipc_uevent_send(struct device *dev, char *uevent)

{

	struct ipc_uevent_info *info = kzalloc(sizeof(*info), GFP_ATOMIC);



	if (!info)

		return;



	/* Initialize the kernel work queue */

	INIT_WORK(&info->work, ipc_uevent_work);



	/* Store the device and event information */

	info->dev = dev;

	snprintf(info->uevent, MAX_UEVENT_LEN, "%s: %s", dev_name(dev), uevent);



	/* Schedule uevent in process context using work queue */

	schedule_work(&info->work);

}

drivers/net/wwan/iosm/iosm_ipc_uevent.h

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/* SPDX-License-Identifier: GPL-2.0-only

 *

 * Copyright (C) 2020-21 Intel Corporation.

 */



#ifndef IOSM_IPC_UEVENT_H

#define IOSM_IPC_UEVENT_H



/* Baseband event strings */

#define UEVENT_MDM_NOT_READY "MDM_NOT_READY"

#define UEVENT_ROM_READY "ROM_READY"

#define UEVENT_MDM_READY "MDM_READY"

#define UEVENT_CRASH "CRASH"

#define UEVENT_CD_READY "CD_READY"

#define UEVENT_CD_READY_LINK_DOWN "CD_READY_LINK_DOWN"

#define UEVENT_MDM_TIMEOUT "MDM_TIMEOUT"



/* Maximum length of user events */

#define MAX_UEVENT_LEN 64



/**

 * struct ipc_uevent_info - Uevent information structure.

 * @dev:	Pointer to device structure

 * @uevent:	Uevent information

 * @work:	Uevent work struct

 */

struct ipc_uevent_info {

	struct device *dev;

	char uevent[MAX_UEVENT_LEN];

	struct work_struct work;

};



/**

 * ipc_uevent_send - Send modem event to user space.

 * @dev:	Generic device pointer

 * @uevent:	Uevent information

 *

 */

void ipc_uevent_send(struct device *dev, char *uevent);



#endif