135 lines
3.4 KiB
C
135 lines
3.4 KiB
C
/*
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* @file mst_ctrl.c
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* @brief MST stop control node
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* Copyright (c) 2015, Samsung Electronics Corporation. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 and
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* only version 2 as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#include <linux/mm.h>
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#include <linux/miscdevice.h>
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#include <linux/slab.h>
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#include <linux/vmalloc.h>
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#include <linux/mman.h>
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#include <linux/random.h>
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#include <linux/init.h>
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#include <linux/raw.h>
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#include <linux/tty.h>
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#include <linux/capability.h>
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#include <linux/ptrace.h>
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#include <linux/device.h>
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#include <linux/highmem.h>
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#include <linux/crash_dump.h>
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#include <linux/backing-dev.h>
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#include <linux/bootmem.h>
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#include <linux/splice.h>
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#include <linux/pfn.h>
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#include <linux/export.h>
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#include <linux/seq_file.h>
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#include <asm/uaccess.h>
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#include <asm/io.h>
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#include <linux/delay.h>
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extern void mst_ctrl_of_mst_hw_onoff(bool on);
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ssize_t mst_ctrl_write(struct file *file, const char __user *buffer, size_t size, loff_t *offset) {
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unsigned long mode;
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char *string;
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if (size == 0)
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return 0;
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printk(KERN_ERR " %s\n", __FUNCTION__);
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/* size includes space for NULL, so size will be "number of buffer char. + 1" */
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string = kmalloc(size * sizeof(char), GFP_KERNEL);
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if (string == NULL) {
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printk(KERN_ERR "%s failed kmalloc\n", __func__);
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return size;
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}
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memcpy(string, buffer, size-1);
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string[size-1] = '\0';
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if(kstrtoul(string, 0, &mode)) {
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kfree(string);
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return size;
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};
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kfree(string);
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printk(KERN_ERR "id: %d\n", (int)mode);
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switch(mode) {
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case 1:
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printk(KERN_ERR " %s -> Notify secure world that NFS starts.\n", __FUNCTION__);
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mst_ctrl_of_mst_hw_onoff(0);
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printk(KERN_ERR " %s -> nfc_status is on / mst_status is off.\n", __FUNCTION__);
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break;
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case 0:
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printk(KERN_ERR " %s -> Notify secure world that NFS ends.\n", __FUNCTION__);
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mst_ctrl_of_mst_hw_onoff(1);
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printk(KERN_ERR " %s -> nfc_status is off.\n", __FUNCTION__);
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break;
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default:
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printk(KERN_ERR " %s -> Invalid mst operations\n", __FUNCTION__);
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break;
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}
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*offset += size;
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return size;
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}
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static int mst_ctrl_read(struct seq_file *m, void *v)
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{
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return 0;
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}
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static int mst_ctrl_open(struct inode *inode, struct file *filp)
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{
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return single_open(filp, mst_ctrl_read, NULL);
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}
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long mst_ctrl_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
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{
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/*
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* Switch according to the ioctl called
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*/
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switch (cmd) {
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case 1:
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printk(KERN_ERR " %s -> [ioctl] Notify secure world that NFS starts.\n", __FUNCTION__);
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mst_ctrl_of_mst_hw_onoff(0);
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printk(KERN_ERR " %s -> [ioctl] nfc_status is on / mst_status is off.\n", __FUNCTION__);
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break;
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case 0:
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printk(KERN_ERR " %s -> [ioctl] Notify secure world that NFS ends.\n", __FUNCTION__);
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mst_ctrl_of_mst_hw_onoff(1);
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printk(KERN_ERR " %s -> [ioctl] nfc_status is off.\n", __FUNCTION__);
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break;
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default:
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printk(KERN_ERR " %s -> [ioctl] Invalid mst ctrl operations\n", __FUNCTION__);
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return -1;
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break;
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}
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return 0;
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}
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const struct file_operations mst_ctrl_fops = {
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.open = mst_ctrl_open,
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.release = single_release,
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.read = seq_read,
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.write = mst_ctrl_write,
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.unlocked_ioctl = mst_ctrl_ioctl,
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};
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