From 9d77db3c730780c8ef5ccd4b66403ff5675cfe4e Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Mon, 13 May 2024 10:30:14 +0000
Subject: [PATCH] modify sin led gpio
---
kernel/drivers/platform/x86/intel_scu_ipcutil.c | 67 ++++++++++++++++++++++++---------
1 files changed, 49 insertions(+), 18 deletions(-)
diff --git a/kernel/drivers/platform/x86/intel_scu_ipcutil.c b/kernel/drivers/platform/x86/intel_scu_ipcutil.c
index aa45424..b7c10c1 100644
--- a/kernel/drivers/platform/x86/intel_scu_ipcutil.c
+++ b/kernel/drivers/platform/x86/intel_scu_ipcutil.c
@@ -1,32 +1,31 @@
+// SPDX-License-Identifier: GPL-2.0
/*
- * intel_scu_ipc.c: Driver for the Intel SCU IPC mechanism
+ * Driver for the Intel SCU IPC mechanism
*
* (C) Copyright 2008-2010 Intel Corporation
* Author: Sreedhara DS (sreedhara.ds@intel.com)
*
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; version 2
- * of the License.
- *
- * This driver provides ioctl interfaces to call intel scu ipc driver api
+ * This driver provides IOCTL interfaces to call Intel SCU IPC driver API.
*/
-#include <linux/module.h>
-#include <linux/kernel.h>
#include <linux/errno.h>
-#include <linux/types.h>
-#include <linux/fs.h>
#include <linux/fcntl.h>
+#include <linux/fs.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
#include <linux/sched.h>
-#include <linux/uaccess.h>
#include <linux/slab.h>
-#include <linux/init.h>
+#include <linux/types.h>
+#include <linux/uaccess.h>
+
#include <asm/intel_scu_ipc.h>
static int major;
-/* ioctl commnds */
+struct intel_scu_ipc_dev *scu;
+static DEFINE_MUTEX(scu_lock);
+
+/* IOCTL commands */
#define INTE_SCU_IPC_REGISTER_READ 0
#define INTE_SCU_IPC_REGISTER_WRITE 1
#define INTE_SCU_IPC_REGISTER_UPDATE 2
@@ -56,12 +55,12 @@
switch (cmd) {
case INTE_SCU_IPC_REGISTER_READ:
- return intel_scu_ipc_readv(data->addr, data->data, count);
+ return intel_scu_ipc_dev_readv(scu, data->addr, data->data, count);
case INTE_SCU_IPC_REGISTER_WRITE:
- return intel_scu_ipc_writev(data->addr, data->data, count);
+ return intel_scu_ipc_dev_writev(scu, data->addr, data->data, count);
case INTE_SCU_IPC_REGISTER_UPDATE:
- return intel_scu_ipc_update_register(data->addr[0],
- data->data[0], data->mask);
+ return intel_scu_ipc_dev_update(scu, data->addr[0], data->data[0],
+ data->mask);
default:
return -ENOTTY;
}
@@ -95,8 +94,40 @@
return 0;
}
+static int scu_ipc_open(struct inode *inode, struct file *file)
+{
+ int ret = 0;
+
+ /* Only single open at the time */
+ mutex_lock(&scu_lock);
+ if (scu) {
+ ret = -EBUSY;
+ goto unlock;
+ }
+
+ scu = intel_scu_ipc_dev_get();
+ if (!scu)
+ ret = -ENODEV;
+
+unlock:
+ mutex_unlock(&scu_lock);
+ return ret;
+}
+
+static int scu_ipc_release(struct inode *inode, struct file *file)
+{
+ mutex_lock(&scu_lock);
+ intel_scu_ipc_dev_put(scu);
+ scu = NULL;
+ mutex_unlock(&scu_lock);
+
+ return 0;
+}
+
static const struct file_operations scu_ipc_fops = {
.unlocked_ioctl = scu_ipc_ioctl,
+ .open = scu_ipc_open,
+ .release = scu_ipc_release,
};
static int __init ipc_module_init(void)
--
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