patch-2.4.20 linux-2.4.20/drivers/char/nvram.c
Next file: linux-2.4.20/drivers/char/pc_keyb.c
Previous file: linux-2.4.20/drivers/char/mxser.c
Back to the patch index
Back to the overall index
- Lines: 1154
- Date:
Thu Nov 28 15:53:12 2002
- Orig file:
linux-2.4.19/drivers/char/nvram.c
- Orig date:
Fri Aug 2 17:39:43 2002
diff -urN linux-2.4.19/drivers/char/nvram.c linux-2.4.20/drivers/char/nvram.c
@@ -3,6 +3,7 @@
*
* Copyright (C) 1997 Roman Hodek <Roman.Hodek@informatik.uni-erlangen.de>
* idea by and with help from Richard Jelinek <rj@suse.de>
+ * Portions copyright (c) 2001,2002 Sun Microsystems (thockin@sun.com)
*
* This driver allows you to access the contents of the non-volatile memory in
* the mc146818rtc.h real-time clock. This chip is built into all PCs and into
@@ -10,9 +11,10 @@
* "NVRAM" (NV stands for non-volatile).
*
* The data are supplied as a (seekable) character device, /dev/nvram. The
- * size of this file is 50, the number of freely available bytes in the memory
- * (i.e., not used by the RTC itself).
- *
+ * size of this file is dependant on the controller. The usual size is 114,
+ * the number of freely available bytes in the memory (i.e., not used by the
+ * RTC itself).
+ *
* Checksums over the NVRAM contents are managed by this driver. In case of a
* bad checksum, reads and writes return -EIO. The checksum can be initialized
* to a sane state either by ioctl(NVRAM_INIT) (clear whole NVRAM) or
@@ -28,40 +30,63 @@
*
* 1.1 Cesar Barros: SMP locking fixes
* added changelog
+ * 1.2 Erik Gilling: Cobalt Networks support
+ * Tim Hockin: general cleanup, Cobalt support
*/
-#define NVRAM_VERSION "1.1"
+#define NVRAM_VERSION "1.2"
#include <linux/module.h>
#include <linux/config.h>
#include <linux/sched.h>
#include <linux/smp_lock.h>
+#include <linux/nvram.h>
#define PC 1
-#define ATARI 2
+#define ATARI 2
+#define COBALT 3
/* select machine configuration */
#if defined(CONFIG_ATARI)
-#define MACH ATARI
-#elif defined(__i386__) || defined(__x86_64__) || defined(__arm__) /* and others?? */
+# define MACH ATARI
+#elif defined(__i386__) || defined(__x86_64__) || defined(__arm__) /* and others?? */
#define MACH PC
+# if defined(CONFIG_COBALT)
+# include <linux/cobalt-nvram.h>
+# define MACH COBALT
+# else
+# define MACH PC
+# endif
#else
-#error Cannot build nvram driver for this machine configuration.
+# error Cannot build nvram driver for this machine configuration.
#endif
#if MACH == PC
/* RTC in a PC */
-#define CHECK_DRIVER_INIT() 1
+#define CHECK_DRIVER_INIT() 1
/* On PCs, the checksum is built only over bytes 2..31 */
#define PC_CKS_RANGE_START 2
#define PC_CKS_RANGE_END 31
-#define PC_CKS_LOC 32
+#define PC_CKS_LOC 32
+#define NVRAM_BYTES (128-NVRAM_FIRST_BYTE)
-#define mach_check_checksum pc_check_checksum
-#define mach_set_checksum pc_set_checksum
-#define mach_proc_infos pc_proc_infos
+#define mach_check_checksum pc_check_checksum
+#define mach_set_checksum pc_set_checksum
+#define mach_proc_infos pc_proc_infos
+
+#endif
+
+#if MACH == COBALT
+
+#define CHECK_DRIVER_INIT() 1
+
+#define NVRAM_BYTES (128-NVRAM_FIRST_BYTE)
+
+#define mach_check_checksum cobalt_check_checksum
+#define mach_set_checksum cobalt_set_checksum
+#define mach_proc_infos cobalt_proc_infos
#endif
@@ -70,18 +95,18 @@
/* Special parameters for RTC in Atari machines */
#include <asm/atarihw.h>
#include <asm/atariints.h>
-#define RTC_PORT(x) (TT_RTC_BAS + 2*(x))
-#define CHECK_DRIVER_INIT() (MACH_IS_ATARI && ATARIHW_PRESENT(TT_CLK))
+#define RTC_PORT(x) (TT_RTC_BAS + 2*(x))
+#define CHECK_DRIVER_INIT() (MACH_IS_ATARI && ATARIHW_PRESENT(TT_CLK))
/* On Ataris, the checksum is over all bytes except the checksum bytes
* themselves; these are at the very end */
#define ATARI_CKS_RANGE_START 0
-#define ATARI_CKS_RANGE_END 47
-#define ATARI_CKS_LOC 48
+#define ATARI_CKS_RANGE_END 47
+#define ATARI_CKS_LOC 48
-#define mach_check_checksum atari_check_checksum
-#define mach_set_checksum atari_set_checksum
-#define mach_proc_infos atari_proc_infos
+#define mach_check_checksum atari_check_checksum
+#define mach_set_checksum atari_set_checksum
+#define mach_proc_infos atari_proc_infos
#endif
@@ -98,7 +123,6 @@
#include <linux/ioport.h>
#include <linux/fcntl.h>
#include <linux/mc146818rtc.h>
-#include <linux/nvram.h>
#include <linux/init.h>
#include <linux/proc_fs.h>
#include <linux/spinlock.h>
@@ -107,289 +131,304 @@
#include <asm/uaccess.h>
#include <asm/system.h>
+static spinlock_t nvram_state_lock = SPIN_LOCK_UNLOCKED;
static int nvram_open_cnt; /* #times opened */
-static int nvram_open_mode; /* special open modes */
-#define NVRAM_WRITE 1 /* opened for writing (exclusive) */
-#define NVRAM_EXCL 2 /* opened with O_EXCL */
+static int nvram_open_mode; /* special open modes */
+#define NVRAM_WRITE 1 /* opened for writing (exclusive) */
+#define NVRAM_EXCL 2 /* opened with O_EXCL */
-#define RTC_FIRST_BYTE 14 /* RTC register number of first NVRAM byte */
-#define NVRAM_BYTES 128-RTC_FIRST_BYTE /* number of NVRAM bytes */
+static int mach_check_checksum(void);
+static void mach_set_checksum(void);
-
-static int mach_check_checksum( void );
-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 );
+static int mach_proc_infos(unsigned char *contents, char *buffer, int *len,
+ off_t *begin, off_t offset, int size);
#endif
-
/*
- * These are the internal NVRAM access functions, which do NOT disable
- * interrupts and do not check the checksum. Both tasks are left to higher
- * level function, so they need to be done only once per syscall.
+ * These functions are provided to be called internally or by other parts of
+ * the kernel. It's up to the caller to ensure correct checksum before reading
+ * or after writing (needs to be done only once).
+ *
+ * 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
+ * know about the RTC cruft.
*/
-static __inline__ unsigned char nvram_read_int( int i )
+unsigned char
+__nvram_read_byte(int i)
{
- return( CMOS_READ( RTC_FIRST_BYTE+i ) );
+ return CMOS_READ(NVRAM_FIRST_BYTE + i);
}
-static __inline__ void nvram_write_int( unsigned char c, int i )
+unsigned char
+nvram_read_byte(int i)
{
- CMOS_WRITE( c, RTC_FIRST_BYTE+i );
-}
+ unsigned long flags;
+ unsigned char c;
-static __inline__ int nvram_check_checksum_int( void )
-{
- return( mach_check_checksum() );
+ spin_lock_irqsave(&rtc_lock, flags);
+ c = __nvram_read_byte(i);
+ spin_unlock_irqrestore(&rtc_lock, flags);
+ return c;
}
-static __inline__ void nvram_set_checksum_int( void )
+/* This races nicely with trying to read with checksum checking (nvram_read) */
+void
+__nvram_write_byte(unsigned char c, int i)
{
- mach_set_checksum();
+ CMOS_WRITE(c, NVRAM_FIRST_BYTE + i);
}
-#if MACH == ATARI
-
-/*
- * These non-internal functions are provided to be called by other parts of
- * the kernel. It's up to the caller to ensure correct checksum before reading
- * or after writing (needs to be done only once).
- *
- * They're only built if CONFIG_ATARI is defined, because Atari drivers use
- * them. For other configurations (PC), the rest of the kernel can't rely on
- * them being present (this driver may not be configured at all, or as a
- * module), so they access config information themselves.
- */
-
-unsigned char nvram_read_byte( int i )
+void
+nvram_write_byte(unsigned char c, int i)
{
unsigned long flags;
- unsigned char c;
- spin_lock_irqsave (&rtc_lock, flags);
- c = nvram_read_int( i );
- spin_unlock_irqrestore (&rtc_lock, flags);
- return( c );
+ spin_lock_irqsave(&rtc_lock, flags);
+ __nvram_write_byte(c, i);
+ spin_unlock_irqrestore(&rtc_lock, flags);
}
-/* This races nicely with trying to read with checksum checking (nvram_read) */
-void nvram_write_byte( unsigned char c, int i )
+int
+__nvram_check_checksum(void)
{
- unsigned long flags;
-
- spin_lock_irqsave (&rtc_lock, flags);
- nvram_write_int( c, i );
- spin_unlock_irqrestore (&rtc_lock, flags);
+ return mach_check_checksum();
}
-int nvram_check_checksum( void )
+int
+nvram_check_checksum(void)
{
unsigned long flags;
int rv;
- spin_lock_irqsave (&rtc_lock, flags);
- rv = nvram_check_checksum_int();
- spin_unlock_irqrestore (&rtc_lock, flags);
- return( rv );
+ spin_lock_irqsave(&rtc_lock, flags);
+ rv = __nvram_check_checksum();
+ spin_unlock_irqrestore(&rtc_lock, flags);
+ return rv;
}
-void nvram_set_checksum( void )
+void
+__nvram_set_checksum(void)
{
- unsigned long flags;
-
- spin_lock_irqsave (&rtc_lock, flags);
- nvram_set_checksum_int();
- spin_unlock_irqrestore (&rtc_lock, flags);
+ mach_set_checksum();
}
-#endif /* MACH == ATARI */
+void
+nvram_set_checksum(void)
+{
+ unsigned long flags;
+ spin_lock_irqsave(&rtc_lock, flags);
+ __nvram_set_checksum();
+ spin_unlock_irqrestore(&rtc_lock, flags);
+}
/*
* The are the file operation function for user access to /dev/nvram
*/
-static long long nvram_llseek(struct file *file,loff_t offset, int origin )
+static long long
+nvram_llseek(struct file *file, loff_t offset, int origin)
{
- switch( origin ) {
- case 0:
+ switch (origin) {
+ case 0:
/* nothing to do */
break;
- case 1:
+ case 1:
offset += file->f_pos;
break;
- case 2:
+ case 2:
offset += NVRAM_BYTES;
break;
}
- return( (offset >= 0) ? (file->f_pos = offset) : -EINVAL );
+ return (offset >= 0) ? (file->f_pos = offset) : -EINVAL;
}
-static ssize_t nvram_read(struct file * file,
- char * buf, size_t count, loff_t *ppos )
+static ssize_t
+nvram_read(struct file *file, char *buf, size_t count, loff_t *ppos)
{
- char contents [NVRAM_BYTES];
+ unsigned char contents[NVRAM_BYTES];
unsigned i = *ppos;
- char *tmp;
+ unsigned char *tmp;
- spin_lock_irq (&rtc_lock);
-
- if (!nvram_check_checksum_int())
+ spin_lock_irq(&rtc_lock);
+
+ if (!__nvram_check_checksum())
goto checksum_err;
for (tmp = contents; count-- > 0 && i < NVRAM_BYTES; ++i, ++tmp)
- *tmp = nvram_read_int(i);
+ *tmp = __nvram_read_byte(i);
- spin_unlock_irq (&rtc_lock);
+ spin_unlock_irq(&rtc_lock);
- if (copy_to_user (buf, contents, tmp - contents))
+ if (copy_to_user(buf, contents, tmp - contents))
return -EFAULT;
*ppos = i;
- return (tmp - contents);
+ return tmp - contents;
-checksum_err:
- spin_unlock_irq (&rtc_lock);
+ checksum_err:
+ spin_unlock_irq(&rtc_lock);
return -EIO;
}
-static ssize_t nvram_write(struct file * file,
- const char * buf, size_t count, loff_t *ppos )
+static ssize_t
+nvram_write(struct file *file, const char *buf, size_t count, loff_t *ppos)
{
- char contents [NVRAM_BYTES];
+ unsigned char contents[NVRAM_BYTES];
unsigned i = *ppos;
- char * tmp;
+ unsigned char *tmp;
+ int len;
- if (copy_from_user (contents, buf, (NVRAM_BYTES - i) < count ?
- (NVRAM_BYTES - i) : count))
+ len = (NVRAM_BYTES - i) < count ? (NVRAM_BYTES - i) : count;
+ if (copy_from_user(contents, buf, len))
return -EFAULT;
- spin_lock_irq (&rtc_lock);
+ spin_lock_irq(&rtc_lock);
- if (!nvram_check_checksum_int())
+ if (!__nvram_check_checksum())
goto checksum_err;
for (tmp = contents; count-- > 0 && i < NVRAM_BYTES; ++i, ++tmp)
- nvram_write_int (*tmp, i);
+ __nvram_write_byte(*tmp, i);
- nvram_set_checksum_int();
+ __nvram_set_checksum();
- spin_unlock_irq (&rtc_lock);
+ spin_unlock_irq(&rtc_lock);
*ppos = i;
- return (tmp - contents);
+ return tmp - contents;
-checksum_err:
- spin_unlock_irq (&rtc_lock);
+ 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;
-
- switch( cmd ) {
- case NVRAM_INIT: /* initialize NVRAM contents and checksum */
+ switch (cmd) {
+
+ case NVRAM_INIT:
+ /* initialize NVRAM contents and checksum */
if (!capable(CAP_SYS_ADMIN))
- return( -EACCES );
+ return -EACCES;
+
+ spin_lock_irq(&rtc_lock);
- spin_lock_irq (&rtc_lock);
+ for (i = 0; i < NVRAM_BYTES; ++i)
+ __nvram_write_byte(0, i);
+ __nvram_set_checksum();
- for( i = 0; i < NVRAM_BYTES; ++i )
- nvram_write_int( 0, i );
- nvram_set_checksum_int();
-
- spin_unlock_irq (&rtc_lock);
- return( 0 );
-
- case NVRAM_SETCKS: /* just set checksum, contents unchanged
- * (maybe useful after checksum garbaged
- * somehow...) */
+ spin_unlock_irq(&rtc_lock);
+ return 0;
+
+ case NVRAM_SETCKS:
+ /* just set checksum, contents unchanged (maybe useful after
+ * checksum garbaged somehow...) */
if (!capable(CAP_SYS_ADMIN))
- return( -EACCES );
+ return -EACCES;
- spin_lock_irq (&rtc_lock);
- nvram_set_checksum_int();
- spin_unlock_irq (&rtc_lock);
- return( 0 );
+ spin_lock_irq(&rtc_lock);
+ __nvram_set_checksum();
+ spin_unlock_irq(&rtc_lock);
+ return 0;
- default:
- return( -ENOTTY );
+ default:
+ return -ENOTTY;
}
}
-static int nvram_open( struct inode *inode, struct file *file )
+static int
+nvram_open(struct inode *inode, struct file *file)
{
+ spin_lock(&nvram_state_lock);
+
if ((nvram_open_cnt && (file->f_flags & O_EXCL)) ||
- (nvram_open_mode & NVRAM_EXCL) ||
- ((file->f_mode & 2) && (nvram_open_mode & NVRAM_WRITE)))
- return( -EBUSY );
+ (nvram_open_mode & NVRAM_EXCL) ||
+ ((file->f_mode & 2) && (nvram_open_mode & NVRAM_WRITE))) {
+ spin_unlock(&nvram_state_lock);
+ return -EBUSY;
+ }
if (file->f_flags & O_EXCL)
nvram_open_mode |= NVRAM_EXCL;
if (file->f_mode & 2)
nvram_open_mode |= NVRAM_WRITE;
nvram_open_cnt++;
- return( 0 );
+
+ spin_unlock(&nvram_state_lock);
+
+ return 0;
}
-static int nvram_release( struct inode *inode, struct file *file )
+static int
+nvram_release(struct inode *inode, struct file *file)
{
- lock_kernel();
+ spin_lock(&nvram_state_lock);
+
nvram_open_cnt--;
- if (file->f_flags & O_EXCL)
+
+ /* if only one instance is open, clear the EXCL bit */
+ if (nvram_open_mode & NVRAM_EXCL)
nvram_open_mode &= ~NVRAM_EXCL;
if (file->f_mode & 2)
nvram_open_mode &= ~NVRAM_WRITE;
- unlock_kernel();
- return( 0 );
-}
+ spin_unlock(&nvram_state_lock);
+ return 0;
+}
#ifndef CONFIG_PROC_FS
-static int nvram_read_proc( char *buffer, char **start, off_t offset,
- int size, int *eof, void *data) { return 0; }
+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;
- off_t begin = 0;
+ int i, len = 0;
+ off_t begin = 0;
+
+ spin_lock_irq(&rtc_lock);
+ for (i = 0; i < NVRAM_BYTES; ++i)
+ contents[i] = __nvram_read_byte(i);
+ spin_unlock_irq(&rtc_lock);
+
+ *eof = mach_proc_infos(contents, buffer, &len, &begin, offset, size);
+
+ if (offset >= begin + len)
+ return 0;
+ *start = buffer + (offset - begin);
+ return (size < begin + len - offset) ? size : begin + len - offset;
- spin_lock_irq (&rtc_lock);
- for( i = 0; i < NVRAM_BYTES; ++i )
- contents[i] = nvram_read_int( i );
- spin_unlock_irq (&rtc_lock);
-
- *eof = mach_proc_infos( contents, buffer, &len, &begin, offset, size );
-
- if (offset >= begin + len)
- return( 0 );
- *start = buffer + (offset - begin);
- return( size < begin + len - offset ? size : begin + len - offset );
-
}
/* This macro frees the machine specific function from bounds checking and
* this like that... */
-#define PRINT_PROC(fmt,args...) \
- do { \
- *len += sprintf( buffer+*len, fmt, ##args ); \
- if (*begin + *len > offset + size) \
- return( 0 ); \
- if (*begin + *len < offset) { \
- *begin += *len; \
- *len = 0; \
- } \
+#define PRINT_PROC(fmt,args...) \
+ do { \
+ *len += sprintf(buffer+*len, fmt, ##args); \
+ if (*begin + *len > offset + size) \
+ return 0; \
+ if (*begin + *len < offset) { \
+ *begin += *len; \
+ *len = 0; \
+ } \
} while(0)
#endif /* CONFIG_PROC_FS */
@@ -410,72 +449,76 @@
&nvram_fops
};
-
-static int __init nvram_init(void)
+static int __init
+nvram_init(void)
{
int ret;
/* First test whether the driver should init at all */
if (!CHECK_DRIVER_INIT())
- return( -ENXIO );
+ return -ENXIO;
- ret = misc_register( &nvram_dev );
+ ret = misc_register(&nvram_dev);
if (ret) {
- printk(KERN_ERR "nvram: can't misc_register on minor=%d\n", NVRAM_MINOR);
+ printk(KERN_ERR "nvram: can't misc_register on minor=%d\n",
+ NVRAM_MINOR);
goto out;
}
- if (!create_proc_read_entry("driver/nvram",0,0,nvram_read_proc,NULL)) {
+ if (!create_proc_read_entry("driver/nvram", 0, 0, nvram_read_proc,
+ NULL)) {
printk(KERN_ERR "nvram: can't create /proc/driver/nvram\n");
ret = -ENOMEM;
goto outmisc;
}
ret = 0;
printk(KERN_INFO "Non-volatile memory driver v" NVRAM_VERSION "\n");
-out:
- return( ret );
-outmisc:
- misc_deregister( &nvram_dev );
+ out:
+ return ret;
+ 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", 0 );
- misc_deregister( &nvram_dev );
+ remove_proc_entry("driver/nvram", 0);
+ misc_deregister(&nvram_dev);
}
module_init(nvram_init);
module_exit(nvram_cleanup_module);
-
/*
* Machine specific functions
*/
-
#if MACH == PC
-static int pc_check_checksum( void )
+static int
+pc_check_checksum(void)
{
int i;
unsigned short sum = 0;
-
- for( i = PC_CKS_RANGE_START; i <= PC_CKS_RANGE_END; ++i )
- sum += nvram_read_int( i );
- return( (sum & 0xffff) ==
- ((nvram_read_int(PC_CKS_LOC) << 8) |
- nvram_read_int(PC_CKS_LOC+1)) );
+ unsigned short expect;
+
+ for (i = PC_CKS_RANGE_START; i <= PC_CKS_RANGE_END; ++i)
+ sum += __nvram_read_byte(i);
+ expect = __nvram_read_byte(PC_CKS_LOC)<<8 |
+ __nvram_read_byte(PC_CKS_LOC+1);
+ return ((sum & 0xffff) == expect);
}
-static void pc_set_checksum( void )
+static void
+pc_set_checksum(void)
{
int i;
unsigned short sum = 0;
-
- for( i = PC_CKS_RANGE_START; i <= PC_CKS_RANGE_END; ++i )
- sum += nvram_read_int( i );
- nvram_write_int( sum >> 8, PC_CKS_LOC );
- nvram_write_int( sum & 0xff, PC_CKS_LOC+1 );
+
+ for (i = PC_CKS_RANGE_START; i <= PC_CKS_RANGE_END; ++i)
+ sum += __nvram_read_byte(i);
+ __nvram_write_byte(sum >> 8, PC_CKS_LOC);
+ __nvram_write_byte(sum & 0xff, PC_CKS_LOC + 1);
}
#ifdef CONFIG_PROC_FS
@@ -492,96 +535,267 @@
"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;
- spin_lock_irq (&rtc_lock);
- checksum = nvram_check_checksum_int();
- spin_unlock_irq (&rtc_lock);
-
- PRINT_PROC( "Checksum status: %svalid\n", checksum ? "" : "not " );
-
- PRINT_PROC( "# floppies : %d\n",
- (nvram[6] & 1) ? (nvram[6] >> 6) + 1 : 0 );
- PRINT_PROC( "Floppy 0 type : " );
+ spin_lock_irq(&rtc_lock);
+ checksum = __nvram_check_checksum();
+ spin_unlock_irq(&rtc_lock);
+
+ PRINT_PROC("Checksum status: %svalid\n", checksum ? "" : "not ");
+
+ PRINT_PROC("# floppies : %d\n",
+ (nvram[6] & 1) ? (nvram[6] >> 6) + 1 : 0);
+ PRINT_PROC("Floppy 0 type : ");
type = nvram[2] >> 4;
- if (type < sizeof(floppy_types)/sizeof(*floppy_types))
- PRINT_PROC( "%s\n", floppy_types[type] );
+ if (type < sizeof (floppy_types) / sizeof (*floppy_types))
+ PRINT_PROC("%s\n", floppy_types[type]);
else
- PRINT_PROC( "%d (unknown)\n", type );
- PRINT_PROC( "Floppy 1 type : " );
+ PRINT_PROC("%d (unknown)\n", type);
+ PRINT_PROC("Floppy 1 type : ");
type = nvram[2] & 0x0f;
- if (type < sizeof(floppy_types)/sizeof(*floppy_types))
- PRINT_PROC( "%s\n", floppy_types[type] );
+ if (type < sizeof (floppy_types) / sizeof (*floppy_types))
+ PRINT_PROC("%s\n", floppy_types[type]);
else
- PRINT_PROC( "%d (unknown)\n", type );
+ PRINT_PROC("%d (unknown)\n", type);
- PRINT_PROC( "HD 0 type : " );
+ PRINT_PROC("HD 0 type : ");
type = nvram[4] >> 4;
if (type)
- PRINT_PROC( "%02x\n", type == 0x0f ? nvram[11] : type );
+ PRINT_PROC("%02x\n", type == 0x0f ? nvram[11] : type);
else
- PRINT_PROC( "none\n" );
+ PRINT_PROC("none\n");
- PRINT_PROC( "HD 1 type : " );
+ PRINT_PROC("HD 1 type : ");
type = nvram[4] & 0x0f;
if (type)
- PRINT_PROC( "%02x\n", type == 0x0f ? nvram[12] : type );
+ PRINT_PROC("%02x\n", type == 0x0f ? nvram[12] : type);
else
- PRINT_PROC( "none\n" );
+ PRINT_PROC("none\n");
- PRINT_PROC( "HD type 48 data: %d/%d/%d C/H/S, precomp %d, lz %d\n",
- nvram[18] | (nvram[19] << 8),
- nvram[20], nvram[25],
- nvram[21] | (nvram[22] << 8),
- nvram[23] | (nvram[24] << 8) );
- PRINT_PROC( "HD type 49 data: %d/%d/%d C/H/S, precomp %d, lz %d\n",
- nvram[39] | (nvram[40] << 8),
- nvram[41], nvram[46],
- nvram[42] | (nvram[43] << 8),
- nvram[44] | (nvram[45] << 8) );
-
- PRINT_PROC( "DOS base memory: %d kB\n", nvram[7] | (nvram[8] << 8) );
- PRINT_PROC( "Extended memory: %d kB (configured), %d kB (tested)\n",
- nvram[9] | (nvram[10] << 8),
- nvram[34] | (nvram[35] << 8) );
-
- PRINT_PROC( "Gfx adapter : %s\n", gfx_types[ (nvram[6] >> 4)&3 ] );
-
- PRINT_PROC( "FPU : %sinstalled\n",
- (nvram[6] & 2) ? "" : "not " );
-
- return( 1 );
+ PRINT_PROC("HD type 48 data: %d/%d/%d C/H/S, precomp %d, lz %d\n",
+ nvram[18] | (nvram[19] << 8),
+ nvram[20], nvram[25],
+ nvram[21] | (nvram[22] << 8), nvram[23] | (nvram[24] << 8));
+ PRINT_PROC("HD type 49 data: %d/%d/%d C/H/S, precomp %d, lz %d\n",
+ nvram[39] | (nvram[40] << 8),
+ nvram[41], nvram[46],
+ nvram[42] | (nvram[43] << 8), nvram[44] | (nvram[45] << 8));
+
+ PRINT_PROC("DOS base memory: %d kB\n", nvram[7] | (nvram[8] << 8));
+ PRINT_PROC("Extended memory: %d kB (configured), %d kB (tested)\n",
+ nvram[9] | (nvram[10] << 8), nvram[34] | (nvram[35] << 8));
+
+ PRINT_PROC("Gfx adapter : %s\n", gfx_types[(nvram[6] >> 4) & 3]);
+
+ PRINT_PROC("FPU : %sinstalled\n",
+ (nvram[6] & 2) ? "" : "not ");
+
+ return 1;
}
#endif
#endif /* MACH == PC */
+#if MACH == COBALT
+
+/* the cobalt CMOS has a wider range of it's checksum */
+static int cobalt_check_checksum(void)
+{
+ int i;
+ unsigned short sum = 0;
+ unsigned short expect;
+
+ for (i = COBT_CMOS_CKS_START; i <= COBT_CMOS_CKS_END; ++i) {
+ if ((i == COBT_CMOS_CHECKSUM) || (i == (COBT_CMOS_CHECKSUM+1)))
+ continue;
+
+ sum += __nvram_read_byte(i);
+ }
+ expect = __nvram_read_byte(COBT_CMOS_CHECKSUM) << 8 |
+ __nvram_read_byte(COBT_CMOS_CHECKSUM+1);
+ return ((sum & 0xffff) == expect);
+}
+
+static void cobalt_set_checksum(void)
+{
+ int i;
+ unsigned short sum = 0;
+
+ for (i = COBT_CMOS_CKS_START; i <= COBT_CMOS_CKS_END; ++i) {
+ if ((i == COBT_CMOS_CHECKSUM) || (i == (COBT_CMOS_CHECKSUM+1)))
+ continue;
+
+ sum += __nvram_read_byte(i);
+ }
+
+ __nvram_write_byte(sum >> 8, COBT_CMOS_CHECKSUM);
+ __nvram_write_byte(sum & 0xff, COBT_CMOS_CHECKSUM+1);
+}
+
+#ifdef CONFIG_PROC_FS
+
+static int cobalt_proc_infos(unsigned char *nvram, char *buffer, int *len,
+ off_t *begin, off_t offset, int size)
+{
+ int i;
+ unsigned int checksum;
+ unsigned int flags;
+ char sernum[14];
+ char *key = "cNoEbTaWlOtR!";
+ unsigned char bto_csum;
+
+ spin_lock_irq(&rtc_lock);
+ checksum = __nvram_check_checksum();
+ spin_unlock_irq(&rtc_lock);
+
+ PRINT_PROC("Checksum status: %svalid\n", checksum ? "" : "not ");
+
+ flags = nvram[COBT_CMOS_FLAG_BYTE_0] << 8
+ | nvram[COBT_CMOS_FLAG_BYTE_1];
+
+ PRINT_PROC("Console: %s\n",
+ flags & COBT_CMOS_CONSOLE_FLAG ? "on": "off");
+
+ PRINT_PROC("Firmware Debug Messages: %s\n",
+ flags & COBT_CMOS_DEBUG_FLAG ? "on": "off");
+
+ PRINT_PROC("Auto Prompt: %s\n",
+ flags & COBT_CMOS_AUTO_PROMPT_FLAG ? "on": "off");
+
+ PRINT_PROC("Shutdown Status: %s\n",
+ flags & COBT_CMOS_CLEAN_BOOT_FLAG ? "clean": "dirty");
+
+ PRINT_PROC("Hardware Probe: %s\n",
+ flags & COBT_CMOS_HW_NOPROBE_FLAG ? "partial": "full");
+
+ PRINT_PROC("System Fault: %sdetected\n",
+ flags & COBT_CMOS_SYSFAULT_FLAG ? "": "not ");
+
+ PRINT_PROC("Panic on OOPS: %s\n",
+ flags & COBT_CMOS_OOPSPANIC_FLAG ? "yes": "no");
+
+ PRINT_PROC("Delayed Cache Initialization: %s\n",
+ flags & COBT_CMOS_DELAY_CACHE_FLAG ? "yes": "no");
+
+ PRINT_PROC("Show Logo at Boot: %s\n",
+ flags & COBT_CMOS_NOLOGO_FLAG ? "no": "yes");
+
+ PRINT_PROC("Boot Method: ");
+ switch (nvram[COBT_CMOS_BOOT_METHOD]) {
+ case COBT_CMOS_BOOT_METHOD_DISK:
+ PRINT_PROC("disk\n");
+ break;
+
+ case COBT_CMOS_BOOT_METHOD_ROM:
+ PRINT_PROC("rom\n");
+ break;
+
+ case COBT_CMOS_BOOT_METHOD_NET:
+ PRINT_PROC("net\n");
+ break;
+
+ default:
+ PRINT_PROC("unknown\n");
+ break;
+ }
+
+ PRINT_PROC("Primary Boot Device: %d:%d\n",
+ nvram[COBT_CMOS_BOOT_DEV0_MAJ],
+ nvram[COBT_CMOS_BOOT_DEV0_MIN] );
+ PRINT_PROC("Secondary Boot Device: %d:%d\n",
+ nvram[COBT_CMOS_BOOT_DEV1_MAJ],
+ nvram[COBT_CMOS_BOOT_DEV1_MIN] );
+ PRINT_PROC("Tertiary Boot Device: %d:%d\n",
+ nvram[COBT_CMOS_BOOT_DEV2_MAJ],
+ nvram[COBT_CMOS_BOOT_DEV2_MIN] );
+
+ PRINT_PROC("Uptime: %d\n",
+ nvram[COBT_CMOS_UPTIME_0] << 24 |
+ nvram[COBT_CMOS_UPTIME_1] << 16 |
+ nvram[COBT_CMOS_UPTIME_2] << 8 |
+ nvram[COBT_CMOS_UPTIME_3]);
+
+ PRINT_PROC("Boot Count: %d\n",
+ nvram[COBT_CMOS_BOOTCOUNT_0] << 24 |
+ nvram[COBT_CMOS_BOOTCOUNT_1] << 16 |
+ nvram[COBT_CMOS_BOOTCOUNT_2] << 8 |
+ nvram[COBT_CMOS_BOOTCOUNT_3]);
+
+ /* 13 bytes of serial num */
+ for (i=0 ; i<13 ; i++) {
+ sernum[i] = nvram[COBT_CMOS_SYS_SERNUM_0 + i];
+ }
+ sernum[13] = '\0';
+
+ checksum = 0;
+ for (i=0 ; i<13 ; i++) {
+ checksum += sernum[i] ^ key[i];
+ }
+ checksum = ((checksum & 0x7f) ^ (0xd6)) & 0xff;
+
+ PRINT_PROC("Serial Number: %s", sernum);
+ if (checksum != nvram[COBT_CMOS_SYS_SERNUM_CSUM]) {
+ PRINT_PROC(" (invalid checksum)");
+ }
+ PRINT_PROC("\n");
+
+ PRINT_PROC("Rom Revison: %d.%d.%d\n", nvram[COBT_CMOS_ROM_REV_MAJ],
+ nvram[COBT_CMOS_ROM_REV_MIN], nvram[COBT_CMOS_ROM_REV_REV]);
+
+ PRINT_PROC("BTO Server: %d.%d.%d.%d", nvram[COBT_CMOS_BTO_IP_0],
+ nvram[COBT_CMOS_BTO_IP_1], nvram[COBT_CMOS_BTO_IP_2],
+ nvram[COBT_CMOS_BTO_IP_3]);
+ bto_csum = nvram[COBT_CMOS_BTO_IP_0] + nvram[COBT_CMOS_BTO_IP_1]
+ + nvram[COBT_CMOS_BTO_IP_2] + nvram[COBT_CMOS_BTO_IP_3];
+ if (bto_csum != nvram[COBT_CMOS_BTO_IP_CSUM]) {
+ PRINT_PROC(" (invalid checksum)");
+ }
+ PRINT_PROC("\n");
+
+ if (flags & COBT_CMOS_VERSION_FLAG
+ && nvram[COBT_CMOS_VERSION] >= COBT_CMOS_VER_BTOCODE) {
+ PRINT_PROC("BTO Code: 0x%x\n",
+ nvram[COBT_CMOS_BTO_CODE_0] << 24 |
+ nvram[COBT_CMOS_BTO_CODE_1] << 16 |
+ nvram[COBT_CMOS_BTO_CODE_2] << 8 |
+ nvram[COBT_CMOS_BTO_CODE_3]);
+ }
+
+ return 1;
+}
+#endif /* CONFIG_PROC_FS */
+
+#endif /* MACH == COBALT */
+
#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_int( i );
- return( nvram_read_int( ATARI_CKS_LOC ) == (~sum & 0xff) &&
- nvram_read_int( ATARI_CKS_LOC+1 ) == (sum & 0xff) );
+
+ 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));
}
-static void atari_set_checksum( void )
+static void
+atari_set_checksum(void)
{
int i;
unsigned char sum = 0;
-
- for( i = ATARI_CKS_RANGE_START; i <= ATARI_CKS_RANGE_END; ++i )
- sum += nvram_read_int( i );
- nvram_write_int( ~sum, ATARI_CKS_LOC );
- nvram_write_int( sum, ATARI_CKS_LOC+1 );
+
+ for (i = ATARI_CKS_RANGE_START; i <= ATARI_CKS_RANGE_END; ++i)
+ sum += __nvram_read_byte(i);
+ __nvram_write_byte(~sum, ATARI_CKS_LOC);
+ __nvram_write_byte(sum, ATARI_CKS_LOC + 1);
}
#ifdef CONFIG_PROC_FS
@@ -626,70 +840,71 @@
#define fieldsize(a) (sizeof(a)/sizeof(*a))
-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;
unsigned vmode;
-
- PRINT_PROC( "Checksum status : %svalid\n", checksum ? "" : "not " );
- PRINT_PROC( "Boot preference : " );
- for( i = fieldsize(boot_prefs)-1; i >= 0; --i ) {
+ PRINT_PROC("Checksum status : %svalid\n", checksum ? "" : "not ");
+
+ PRINT_PROC("Boot preference : ");
+ for (i = fieldsize(boot_prefs) - 1; i >= 0; --i) {
if (nvram[1] == boot_prefs[i].val) {
- PRINT_PROC( "%s\n", boot_prefs[i].name );
+ PRINT_PROC("%s\n", boot_prefs[i].name);
break;
}
}
if (i < 0)
- PRINT_PROC( "0x%02x (undefined)\n", nvram[1] );
+ PRINT_PROC("0x%02x (undefined)\n", nvram[1]);
- PRINT_PROC( "SCSI arbitration : %s\n", (nvram[16] & 0x80) ? "on" : "off" );
- PRINT_PROC( "SCSI host ID : " );
+ PRINT_PROC("SCSI arbitration : %s\n",
+ (nvram[16] & 0x80) ? "on" : "off");
+ PRINT_PROC("SCSI host ID : ");
if (nvram[16] & 0x80)
- PRINT_PROC( "%d\n", nvram[16] & 7 );
+ PRINT_PROC("%d\n", nvram[16] & 7);
else
- PRINT_PROC( "n/a\n" );
+ PRINT_PROC("n/a\n");
/* the following entries are defined only for the Falcon */
if ((atari_mch_cookie >> 16) != ATARI_MCH_FALCON)
return 1;
- PRINT_PROC( "OS language : " );
+ PRINT_PROC("OS language : ");
if (nvram[6] < fieldsize(languages))
- PRINT_PROC( "%s\n", languages[nvram[6]] );
+ PRINT_PROC("%s\n", languages[nvram[6]]);
else
- PRINT_PROC( "%u (undefined)\n", nvram[6] );
- PRINT_PROC( "Keyboard language: " );
+ PRINT_PROC("%u (undefined)\n", nvram[6]);
+ PRINT_PROC("Keyboard language: ");
if (nvram[7] < fieldsize(languages))
- PRINT_PROC( "%s\n", languages[nvram[7]] );
+ PRINT_PROC("%s\n", languages[nvram[7]]);
else
- PRINT_PROC( "%u (undefined)\n", nvram[7] );
- PRINT_PROC( "Date format : " );
- PRINT_PROC( dateformat[nvram[8]&7],
- nvram[9] ? nvram[9] : '/', nvram[9] ? nvram[9] : '/' );
- PRINT_PROC( ", %dh clock\n", nvram[8] & 16 ? 24 : 12 );
- PRINT_PROC( "Boot delay : " );
+ PRINT_PROC("%u (undefined)\n", nvram[7]);
+ PRINT_PROC("Date format : ");
+ PRINT_PROC(dateformat[nvram[8] & 7],
+ nvram[9] ? nvram[9] : '/', nvram[9] ? nvram[9] : '/');
+ PRINT_PROC(", %dh clock\n", nvram[8] & 16 ? 24 : 12);
+ PRINT_PROC("Boot delay : ");
if (nvram[10] == 0)
- PRINT_PROC( "default" );
+ PRINT_PROC("default");
else
- PRINT_PROC( "%ds%s\n", nvram[10],
- nvram[10] < 8 ? ", no memory test" : "" );
+ PRINT_PROC("%ds%s\n", nvram[10],
+ nvram[10] < 8 ? ", no memory test" : "");
vmode = (nvram[14] << 8) || nvram[15];
- PRINT_PROC( "Video mode : %s colors, %d columns, %s %s monitor\n",
- colors[vmode & 7],
- vmode & 8 ? 80 : 40,
- vmode & 16 ? "VGA" : "TV",
- vmode & 32 ? "PAL" : "NTSC" );
- PRINT_PROC( " %soverscan, compat. mode %s%s\n",
- vmode & 64 ? "" : "no ",
- vmode & 128 ? "on" : "off",
- vmode & 256 ?
- (vmode & 16 ? ", line doubling" : ", half screen") : "" );
-
- return( 1 );
+ PRINT_PROC("Video mode : %s colors, %d columns, %s %s monitor\n",
+ colors[vmode & 7],
+ vmode & 8 ? 80 : 40,
+ vmode & 16 ? "VGA" : "TV", vmode & 32 ? "PAL" : "NTSC");
+ PRINT_PROC(" %soverscan, compat. mode %s%s\n",
+ vmode & 64 ? "" : "no ",
+ vmode & 128 ? "on" : "off",
+ vmode & 256 ?
+ (vmode & 16 ? ", line doubling" : ", half screen") : "");
+
+ return 1;
}
#endif
@@ -697,12 +912,11 @@
MODULE_LICENSE("GPL");
-EXPORT_NO_SYMBOLS;
-
-/*
- * Local variables:
- * c-indent-level: 4
- * tab-width: 4
- * End:
- */
-
+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);
+EXPORT_SYMBOL(__nvram_set_checksum);
+EXPORT_SYMBOL(nvram_set_checksum);
FUNET's LINUX-ADM group, linux-adm@nic.funet.fi
TCL-scripts by Sam Shen (who was at: slshen@lbl.gov)