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Diffstat (limited to 'drivers/char/nvram.c')
-rw-r--r--drivers/char/nvram.c126
1 files changed, 52 insertions, 74 deletions
diff --git a/drivers/char/nvram.c b/drivers/char/nvram.c
index 8054ee839b3c..1a04f3df91ed 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);
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-23 16:18:57 +0100