diff options
| -rw-r--r-- | drivers/char/nvram.c | 126 |
1 files changed, 52 insertions, 74 deletions
diff --git a/drivers/char/nvram.c b/drivers/char/nvram.c index 8054ee8..1a04f3d 100644 --- a/drivers/char/nvram.c +++ b/drivers/char/nvram.c @@ -46,7 +46,7 @@ /* select machine configuration */ #if defined(CONFIG_ATARI) # define MACH ATARI -#elif defined(__i386__) || defined(__x86_64__) || defined(__arm__) /* and others?? */ +#elif defined(__i386__) || defined(__x86_64__) || defined(__arm__) /* and ?? */ # define MACH PC #else # error Cannot build nvram driver for this machine configuration. @@ -107,9 +107,9 @@ #include <linux/init.h> #include <linux/proc_fs.h> #include <linux/spinlock.h> +#include <linux/io.h> +#include <linux/uaccess.h> -#include <asm/io.h> -#include <asm/uaccess.h> #include <asm/system.h> static DEFINE_SPINLOCK(nvram_state_lock); @@ -123,7 +123,7 @@ static void mach_set_checksum(void); #ifdef CONFIG_PROC_FS static int mach_proc_infos(unsigned char *contents, char *buffer, int *len, - off_t *begin, off_t offset, int size); + off_t *begin, off_t offset, int size); #endif /* @@ -133,18 +133,17 @@ static int mach_proc_infos(unsigned char *contents, char *buffer, int *len, * * It is worth noting that these functions all access bytes of general * purpose memory in the NVRAM - that is to say, they all add the - * NVRAM_FIRST_BYTE offset. Pass them offsets into NVRAM as if you did not + * NVRAM_FIRST_BYTE offset. Pass them offsets into NVRAM as if you did not * know about the RTC cruft. */ -unsigned char -__nvram_read_byte(int i) +unsigned char __nvram_read_byte(int i) { return CMOS_READ(NVRAM_FIRST_BYTE + i); } +EXPORT_SYMBOL(__nvram_read_byte); -unsigned char -nvram_read_byte(int i) +unsigned char nvram_read_byte(int i) { unsigned long flags; unsigned char c; @@ -154,16 +153,16 @@ nvram_read_byte(int i) spin_unlock_irqrestore(&rtc_lock, flags); return c; } +EXPORT_SYMBOL(nvram_read_byte); /* This races nicely with trying to read with checksum checking (nvram_read) */ -void -__nvram_write_byte(unsigned char c, int i) +void __nvram_write_byte(unsigned char c, int i) { CMOS_WRITE(c, NVRAM_FIRST_BYTE + i); } +EXPORT_SYMBOL(__nvram_write_byte); -void -nvram_write_byte(unsigned char c, int i) +void nvram_write_byte(unsigned char c, int i) { unsigned long flags; @@ -171,15 +170,15 @@ nvram_write_byte(unsigned char c, int i) __nvram_write_byte(c, i); spin_unlock_irqrestore(&rtc_lock, flags); } +EXPORT_SYMBOL(nvram_write_byte); -int -__nvram_check_checksum(void) +int __nvram_check_checksum(void) { return mach_check_checksum(); } +EXPORT_SYMBOL(__nvram_check_checksum); -int -nvram_check_checksum(void) +int nvram_check_checksum(void) { unsigned long flags; int rv; @@ -189,16 +188,15 @@ nvram_check_checksum(void) spin_unlock_irqrestore(&rtc_lock, flags); return rv; } +EXPORT_SYMBOL(nvram_check_checksum); -static void -__nvram_set_checksum(void) +static void __nvram_set_checksum(void) { mach_set_checksum(); } #if 0 -void -nvram_set_checksum(void) +void nvram_set_checksum(void) { unsigned long flags; @@ -212,7 +210,7 @@ nvram_set_checksum(void) * The are the file operation function for user access to /dev/nvram */ -static loff_t nvram_llseek(struct file *file,loff_t offset, int origin ) +static loff_t nvram_llseek(struct file *file, loff_t offset, int origin) { lock_kernel(); switch (origin) { @@ -230,8 +228,8 @@ static loff_t nvram_llseek(struct file *file,loff_t offset, int origin ) return (offset >= 0) ? (file->f_pos = offset) : -EINVAL; } -static ssize_t -nvram_read(struct file *file, char __user *buf, size_t count, loff_t *ppos) +static ssize_t nvram_read(struct file *file, char __user *buf, + size_t count, loff_t *ppos) { unsigned char contents[NVRAM_BYTES]; unsigned i = *ppos; @@ -254,13 +252,13 @@ nvram_read(struct file *file, char __user *buf, size_t count, loff_t *ppos) return tmp - contents; - checksum_err: +checksum_err: spin_unlock_irq(&rtc_lock); return -EIO; } -static ssize_t -nvram_write(struct file *file, const char __user *buf, size_t count, loff_t *ppos) +static ssize_t nvram_write(struct file *file, const char __user *buf, + size_t count, loff_t *ppos) { unsigned char contents[NVRAM_BYTES]; unsigned i = *ppos; @@ -287,14 +285,13 @@ nvram_write(struct file *file, const char __user *buf, size_t count, loff_t *ppo return tmp - contents; - checksum_err: +checksum_err: spin_unlock_irq(&rtc_lock); return -EIO; } -static int -nvram_ioctl(struct inode *inode, struct file *file, - unsigned int cmd, unsigned long arg) +static int nvram_ioctl(struct inode *inode, struct file *file, + unsigned int cmd, unsigned long arg) { int i; @@ -315,7 +312,7 @@ nvram_ioctl(struct inode *inode, struct file *file, return 0; case NVRAM_SETCKS: - /* just set checksum, contents unchanged (maybe useful after + /* just set checksum, contents unchanged (maybe useful after * checksum garbaged somehow...) */ if (!capable(CAP_SYS_ADMIN)) return -EACCES; @@ -330,8 +327,7 @@ nvram_ioctl(struct inode *inode, struct file *file, } } -static int -nvram_open(struct inode *inode, struct file *file) +static int nvram_open(struct inode *inode, struct file *file) { lock_kernel(); spin_lock(&nvram_state_lock); @@ -356,8 +352,7 @@ nvram_open(struct inode *inode, struct file *file) return 0; } -static int -nvram_release(struct inode *inode, struct file *file) +static int nvram_release(struct inode *inode, struct file *file) { spin_lock(&nvram_state_lock); @@ -375,17 +370,15 @@ nvram_release(struct inode *inode, struct file *file) } #ifndef CONFIG_PROC_FS -static int -nvram_read_proc(char *buffer, char **start, off_t offset, - int size, int *eof, void *data) +static int nvram_read_proc(char *buffer, char **start, off_t offset, + int size, int *eof, void *data) { return 0; } #else -static int -nvram_read_proc(char *buffer, char **start, off_t offset, - int size, int *eof, void *data) +static int nvram_read_proc(char *buffer, char **start, off_t offset, + int size, int *eof, void *data) { unsigned char contents[NVRAM_BYTES]; int i, len = 0; @@ -409,14 +402,14 @@ nvram_read_proc(char *buffer, char **start, off_t offset, * this like that... */ #define PRINT_PROC(fmt,args...) \ do { \ - *len += sprintf(buffer+*len, fmt, ##args); \ + *len += sprintf(buffer + *len, fmt, ##args); \ if (*begin + *len > offset + size) \ return 0; \ if (*begin + *len < offset) { \ *begin += *len; \ *len = 0; \ } \ - } while(0) + } while (0) #endif /* CONFIG_PROC_FS */ @@ -436,8 +429,7 @@ static struct miscdevice nvram_dev = { &nvram_fops }; -static int __init -nvram_init(void) +static int __init nvram_init(void) { int ret; @@ -459,15 +451,14 @@ nvram_init(void) } ret = 0; printk(KERN_INFO "Non-volatile memory driver v" NVRAM_VERSION "\n"); - out: +out: return ret; - outmisc: +outmisc: misc_deregister(&nvram_dev); goto out; } -static void __exit -nvram_cleanup_module(void) +static void __exit nvram_cleanup_module(void) { remove_proc_entry("driver/nvram", NULL); misc_deregister(&nvram_dev); @@ -482,8 +473,7 @@ module_exit(nvram_cleanup_module); #if MACH == PC -static int -pc_check_checksum(void) +static int pc_check_checksum(void) { int i; unsigned short sum = 0; @@ -493,11 +483,10 @@ pc_check_checksum(void) sum += __nvram_read_byte(i); expect = __nvram_read_byte(PC_CKS_LOC)<<8 | __nvram_read_byte(PC_CKS_LOC+1); - return ((sum & 0xffff) == expect); + return (sum & 0xffff) == expect; } -static void -pc_set_checksum(void) +static void pc_set_checksum(void) { int i; unsigned short sum = 0; @@ -522,9 +511,8 @@ static char *gfx_types[] = { "monochrome", }; -static int -pc_proc_infos(unsigned char *nvram, char *buffer, int *len, - off_t *begin, off_t offset, int size) +static int pc_proc_infos(unsigned char *nvram, char *buffer, int *len, + off_t *begin, off_t offset, int size) { int checksum; int type; @@ -590,20 +578,18 @@ pc_proc_infos(unsigned char *nvram, char *buffer, int *len, #if MACH == ATARI -static int -atari_check_checksum(void) +static int atari_check_checksum(void) { int i; unsigned char sum = 0; for (i = ATARI_CKS_RANGE_START; i <= ATARI_CKS_RANGE_END; ++i) sum += __nvram_read_byte(i); - return (__nvram_read_byte(ATARI_CKS_LOC) == (~sum & 0xff) && - __nvram_read_byte(ATARI_CKS_LOC + 1) == (sum & 0xff)); + return (__nvram_read_byte(ATARI_CKS_LOC) == (~sum & 0xff)) && + (__nvram_read_byte(ATARI_CKS_LOC + 1) == (sum & 0xff)); } -static void -atari_set_checksum(void) +static void atari_set_checksum(void) { int i; unsigned char sum = 0; @@ -654,9 +640,8 @@ static char *colors[] = { "2", "4", "16", "256", "65536", "??", "??", "??" }; -static int -atari_proc_infos(unsigned char *nvram, char *buffer, int *len, - off_t *begin, off_t offset, int size) +static int atari_proc_infos(unsigned char *nvram, char *buffer, int *len, + off_t *begin, off_t offset, int size) { int checksum = nvram_check_checksum(); int i; @@ -725,11 +710,4 @@ atari_proc_infos(unsigned char *nvram, char *buffer, int *len, #endif /* MACH == ATARI */ MODULE_LICENSE("GPL"); - -EXPORT_SYMBOL(__nvram_read_byte); -EXPORT_SYMBOL(nvram_read_byte); -EXPORT_SYMBOL(__nvram_write_byte); -EXPORT_SYMBOL(nvram_write_byte); -EXPORT_SYMBOL(__nvram_check_checksum); -EXPORT_SYMBOL(nvram_check_checksum); MODULE_ALIAS_MISCDEV(NVRAM_MINOR); |