void __exit nvramdrv_exit(void)
{
int index;
for (index = 0; index < 1; index++) {
if (fb[index].dirty)
nvram_commit(index);
ra_nvram_close();
fb[index].valid = 0;
//free env
kfree(fb[index].env.data);
}
unregister_chrdev(nvram_major, NVRAM_DEVNAME);
}
static void ra_nvram_exit(void)
{
int index;
for (index = 0; index < FLASH_BLOCK_NUM; index++) {
if (fb[index].dirty)
nvram_commit(index);
ra_nvram_close(index);
fb[index].valid = 0;
//free env
kfree(fb[index].env.data);
}
unregister_chrdev(ralink_nvram_major, RALINK_NVRAM_DEVNAME);
}
/*
* clear flash by writing all 1's value
*/
int nvram_clear(int index)
{
unsigned long to;
int len;
RANV_PRINT("--> nvram_clear %d\n", index);
RANV_CHECK_INDEX(-1);
ra_nvram_close(index);
down(&nvram_sem);
//construct all 1s env block
len = fb[index].flash_max_len - sizeof(fb[index].env.crc);
if (!fb[index].env.data) {
fb[index].env.data = (char *)kmalloc(len, GFP_KERNEL);
if (!fb[index].env.data)
return -ENOMEM;
}
memset(fb[index].env.data, 0xFF, len);
//calculate crc
fb[index].env.crc = (unsigned long)nv_crc32(0, (unsigned char *)fb[index].env.data, len);
//write crc to flash
to = fb[index].flash_offset;
len = sizeof(fb[index].env.crc);
ra_mtd_write_nm(RALINK_NVRAM_MTDNAME, to, len, (unsigned char *)&fb[index].env.crc);
//write all 1s data to flash
to = to + len;
len = fb[index].flash_max_len - len;
ra_mtd_write_nm(RALINK_NVRAM_MTDNAME, to, len, (unsigned char *)fb[index].env.data);
RANV_PRINT("clear flash from 0x%x for 0x%x bytes\n", (unsigned int)to, len);
fb[index].dirty = 0;
fb[index].valid = 1;
up(&nvram_sem);
return 0;
}
static void ra_nvram_exit(void)
{
int index;
for (index = 0; index < FLASH_BLOCK_NUM; index++) {
if (fb[index].dirty)
nvram_commit(index);
ra_nvram_close(index);
fb[index].valid = 0;
//free env
kfree(fb[index].env.data);
}
#ifdef CONFIG_DEVFS_FS
devfs_unregister_chrdev(ralink_nvram_major, RALINK_NVRAM_DEVNAME);
devfs_unregister(devfs_handle);
#else
unregister_chrdev(ralink_nvram_major, RALINK_NVRAM_DEVNAME);
#endif
}
