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166 lines
4.0 KiB
C
Executable File
166 lines
4.0 KiB
C
Executable File
/*
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* Copyright (C) 2010 ROCKCHIP, Inc.
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* Author: roger_chen <cz@rock-chips.com>
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*
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* This program is the virtual flash device
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* used to store bd_addr or MAC
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*
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*/
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/errno.h>
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#include <linux/miscdevice.h>
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#include <linux/fs.h>
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#include <linux/platform_device.h>
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#include <linux/slab.h>
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#include <asm/uaccess.h>
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#if 0
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#define DBG(x...) printk("vFlash:" x)
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#else
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#define DBG(x...)
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#endif
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#define VERSION "0.1"
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static int minor = MISC_DYNAMIC_MINOR;
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static struct miscdevice vflash_miscdev;
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#define READ_BDADDR_FROM_FLASH 0x01
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extern char GetSNSectorInfo(char * pbuf);
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extern unsigned char wlan_mac_addr[6];
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static long vflash_ioctl(struct file *file,
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unsigned int cmd, unsigned long arg)
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{
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void __user *argp = (void __user *)arg;
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DBG("%s---cmd=0x%x---arg=0x%x\n", __FUNCTION__, cmd, arg);
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if(NULL == argp)
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return -EFAULT;
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switch(cmd)
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{
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case READ_BDADDR_FROM_FLASH:
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{
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#ifdef CONFIG_WIFI_MAC
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unsigned char bd_addr[6] = {0};
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int i;
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printk("vflash: wlan_mac_addr:%X:%X:%X:%x:%X:%x\n", wlan_mac_addr[0],
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wlan_mac_addr[1],
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wlan_mac_addr[2],
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wlan_mac_addr[3],
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wlan_mac_addr[4],
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wlan_mac_addr[5] );
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for (i=1; i<6; i++) {
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bd_addr[i] = wlan_mac_addr[5-i];
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}
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bd_addr[0] = wlan_mac_addr[5]+1;
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printk("vflash: bd_addr:%X:%X:%X:%x:%X:%x\n", bd_addr[5],
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bd_addr[4],
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bd_addr[3],
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bd_addr[2],
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bd_addr[1],
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bd_addr[0] );
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if(copy_to_user(argp, bd_addr, 6)) {
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printk("ERROR: copy_to_user---%s\n", __FUNCTION__);
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return -EFAULT;
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}
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#else
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char *tempBuf = (char *)kmalloc(512, GFP_KERNEL);
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char bd_addr[7] = {0};
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int i;
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GetSNSectorInfo(tempBuf);
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for(i=498; i<=504; i++)
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{
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DBG("tempBuf[%d]=%x\n", i, tempBuf[i]);
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bd_addr[504-i] = tempBuf[i];
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}
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if(copy_to_user(argp, bd_addr, 6))
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{
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printk("ERROR: copy_to_user---%s\n", __FUNCTION__);
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kfree(tempBuf);
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return -EFAULT;
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}
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kfree(tempBuf);
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#endif
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}
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break;
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default:
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break;
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}
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return 0;
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}
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static int vflash_open(struct inode *inode, struct file *file)
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{
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DBG("%s\n", __FUNCTION__);
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return 0;
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}
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static int vflash_release(struct inode *inode, struct file *file)
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{
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DBG("%s\n", __FUNCTION__);
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return 0;
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}
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static const struct file_operations vflash_fops = {
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.owner = THIS_MODULE,
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.unlocked_ioctl = vflash_ioctl,
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.open = vflash_open,
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.release = vflash_release,
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};
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static struct miscdevice vflash_miscdev= {
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.name = "vflash",
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.fops = &vflash_fops,
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};
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static int vflash_init(void)
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{
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vflash_miscdev.minor = minor;
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if (misc_register(&vflash_miscdev) < 0) {
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printk(KERN_ERR"Can't register misc device with minor %d", minor);
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return -EIO;
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}
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return 0;
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}
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static void vflash_exit(void)
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{
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if (misc_deregister(&vflash_miscdev) < 0)
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printk(KERN_ERR"Can't unregister misc device with minor %d", minor);
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}
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module_init(vflash_init);
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module_exit(vflash_exit);
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module_param(minor, int, 0444);
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MODULE_PARM_DESC(minor, "Miscellaneous minor device number");
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MODULE_AUTHOR("roger_chen <cz@rock-chips.com>");
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MODULE_DESCRIPTION("Bluetooth virtual flash driver ver " VERSION);
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MODULE_VERSION(VERSION);
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MODULE_LICENSE("GPL");
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