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drivers/char/nvram.c
16.7 KB
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/* * CMOS/NV-RAM driver for Linux * * 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 * many Atari machines. In the former it's called "CMOS-RAM", in the latter * "NVRAM" (NV stands for non-volatile). * * The data are supplied as a (seekable) character device, /dev/nvram. The * size of this file is dependent 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 * ioctl(NVRAM_SETCKS) (doesn't change contents, just makes checksum valid * again; use with care!) * * This file also provides some functions for other parts of the kernel that * want to access the NVRAM: nvram_{read,write,check_checksum,set_checksum}. * Obviously this can be used only if this driver is always configured into * the kernel and is not a module. Since the functions are used by some Atari * drivers, this is the case on the Atari. * * * 1.1 Cesar Barros: SMP locking fixes * added changelog * 1.2 Erik Gilling: Cobalt Networks support * Tim Hockin: general cleanup, Cobalt support |
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* 1.3 Wim Van Sebroeck: convert PRINT_PROC to seq_file |
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*/ |
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#define NVRAM_VERSION "1.3" |
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#include <linux/module.h> |
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#include <linux/nvram.h> #define PC 1 #define ATARI 2 |
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/* select machine configuration */ #if defined(CONFIG_ATARI) # define MACH ATARI |
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#elif defined(__i386__) || defined(__x86_64__) || defined(__arm__) /* and ?? */ |
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# define MACH PC |
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#else # error Cannot build nvram driver for this machine configuration. #endif #if MACH == PC /* RTC in a PC */ #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 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 #endif |
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#if MACH == ATARI /* 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 NVRAM_BYTES 50 /* 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 mach_check_checksum atari_check_checksum #define mach_set_checksum atari_set_checksum #define mach_proc_infos atari_proc_infos #endif /* Note that *all* calls to CMOS_READ and CMOS_WRITE must be done with * rtc_lock held. Due to the index-port/data-port design of the RTC, we * don't want two different things trying to get to it at once. (e.g. the |
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* periodic 11 min sync from kernel/time/ntp.c vs. this driver.) |
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*/ #include <linux/types.h> #include <linux/errno.h> #include <linux/miscdevice.h> |
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#include <linux/ioport.h> #include <linux/fcntl.h> #include <linux/mc146818rtc.h> #include <linux/init.h> #include <linux/proc_fs.h> |
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#include <linux/seq_file.h> |
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#include <linux/spinlock.h> |
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#include <linux/io.h> #include <linux/uaccess.h> |
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#include <linux/mutex.h> |
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#include <linux/pagemap.h> |
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|
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|
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static DEFINE_MUTEX(nvram_mutex); |
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static DEFINE_SPINLOCK(nvram_state_lock); 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 mach_check_checksum(void); static void mach_set_checksum(void); #ifdef CONFIG_PROC_FS |
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static void mach_proc_infos(unsigned char *contents, struct seq_file *seq, void *offset); |
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#endif /* * 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 |
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* NVRAM_FIRST_BYTE offset. Pass them offsets into NVRAM as if you did not |
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* know about the RTC cruft. */ |
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unsigned char __nvram_read_byte(int i) |
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{ return CMOS_READ(NVRAM_FIRST_BYTE + i); } |
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EXPORT_SYMBOL(__nvram_read_byte); |
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|
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unsigned char nvram_read_byte(int i) |
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{ unsigned long flags; unsigned char c; spin_lock_irqsave(&rtc_lock, flags); c = __nvram_read_byte(i); spin_unlock_irqrestore(&rtc_lock, flags); return c; } |
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EXPORT_SYMBOL(nvram_read_byte); |
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/* This races nicely with trying to read with checksum checking (nvram_read) */ |
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void __nvram_write_byte(unsigned char c, int i) |
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{ CMOS_WRITE(c, NVRAM_FIRST_BYTE + i); } |
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EXPORT_SYMBOL(__nvram_write_byte); |
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|
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void nvram_write_byte(unsigned char c, int i) |
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{ unsigned long flags; spin_lock_irqsave(&rtc_lock, flags); __nvram_write_byte(c, i); spin_unlock_irqrestore(&rtc_lock, flags); } |
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EXPORT_SYMBOL(nvram_write_byte); |
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|
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int __nvram_check_checksum(void) |
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{ return mach_check_checksum(); } |
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EXPORT_SYMBOL(__nvram_check_checksum); |
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|
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int nvram_check_checksum(void) |
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{ unsigned long flags; int rv; spin_lock_irqsave(&rtc_lock, flags); rv = __nvram_check_checksum(); spin_unlock_irqrestore(&rtc_lock, flags); return rv; } |
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EXPORT_SYMBOL(nvram_check_checksum); |
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|
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static void __nvram_set_checksum(void) |
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{ mach_set_checksum(); } |
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#if 0 |
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void nvram_set_checksum(void) |
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{ unsigned long flags; spin_lock_irqsave(&rtc_lock, flags); __nvram_set_checksum(); spin_unlock_irqrestore(&rtc_lock, flags); } |
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#endif /* 0 */ |
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/* * The are the file operation function for user access to /dev/nvram */ |
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static loff_t nvram_llseek(struct file *file, loff_t offset, int origin) |
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{ |
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return generic_file_llseek_size(file, offset, origin, MAX_LFS_FILESIZE, NVRAM_BYTES); |
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} |
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static ssize_t nvram_read(struct file *file, char __user *buf, size_t count, loff_t *ppos) |
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{ unsigned char contents[NVRAM_BYTES]; unsigned i = *ppos; unsigned char *tmp; 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_byte(i); spin_unlock_irq(&rtc_lock); if (copy_to_user(buf, contents, tmp - contents)) return -EFAULT; *ppos = i; return tmp - contents; |
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checksum_err: |
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spin_unlock_irq(&rtc_lock); return -EIO; } |
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static ssize_t nvram_write(struct file *file, const char __user *buf, size_t count, loff_t *ppos) |
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{ unsigned char contents[NVRAM_BYTES]; unsigned i = *ppos; unsigned char *tmp; |
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|
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if (i >= NVRAM_BYTES) return 0; /* Past EOF */ if (count > NVRAM_BYTES - i) count = NVRAM_BYTES - i; if (count > NVRAM_BYTES) return -EFAULT; /* Can't happen, but prove it to gcc */ if (copy_from_user(contents, buf, count)) |
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return -EFAULT; spin_lock_irq(&rtc_lock); if (!__nvram_check_checksum()) goto checksum_err; |
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for (tmp = contents; count--; ++i, ++tmp) |
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__nvram_write_byte(*tmp, i); __nvram_set_checksum(); spin_unlock_irq(&rtc_lock); *ppos = i; return tmp - contents; |
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checksum_err: |
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spin_unlock_irq(&rtc_lock); return -EIO; } |
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static long nvram_ioctl(struct file *file, unsigned int cmd, unsigned long arg) |
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{ int i; switch (cmd) { case NVRAM_INIT: /* initialize NVRAM contents and checksum */ if (!capable(CAP_SYS_ADMIN)) return -EACCES; |
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mutex_lock(&nvram_mutex); |
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spin_lock_irq(&rtc_lock); for (i = 0; i < NVRAM_BYTES; ++i) __nvram_write_byte(0, i); __nvram_set_checksum(); spin_unlock_irq(&rtc_lock); |
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mutex_unlock(&nvram_mutex); |
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return 0; case NVRAM_SETCKS: |
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/* just set checksum, contents unchanged (maybe useful after |
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* checksum garbaged somehow...) */ if (!capable(CAP_SYS_ADMIN)) return -EACCES; |
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mutex_lock(&nvram_mutex); |
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spin_lock_irq(&rtc_lock); __nvram_set_checksum(); spin_unlock_irq(&rtc_lock); |
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mutex_unlock(&nvram_mutex); |
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return 0; default: return -ENOTTY; } } |
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static int nvram_open(struct inode *inode, struct file *file) |
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{ spin_lock(&nvram_state_lock); if ((nvram_open_cnt && (file->f_flags & O_EXCL)) || (nvram_open_mode & NVRAM_EXCL) || |
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((file->f_mode & FMODE_WRITE) && (nvram_open_mode & NVRAM_WRITE))) { |
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spin_unlock(&nvram_state_lock); return -EBUSY; } if (file->f_flags & O_EXCL) nvram_open_mode |= NVRAM_EXCL; |
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if (file->f_mode & FMODE_WRITE) |
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nvram_open_mode |= NVRAM_WRITE; nvram_open_cnt++; spin_unlock(&nvram_state_lock); return 0; } |
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static int nvram_release(struct inode *inode, struct file *file) |
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{ spin_lock(&nvram_state_lock); nvram_open_cnt--; /* if only one instance is open, clear the EXCL bit */ if (nvram_open_mode & NVRAM_EXCL) nvram_open_mode &= ~NVRAM_EXCL; |
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if (file->f_mode & FMODE_WRITE) |
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nvram_open_mode &= ~NVRAM_WRITE; spin_unlock(&nvram_state_lock); return 0; } #ifndef CONFIG_PROC_FS |
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static int nvram_add_proc_fs(void) |
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{ return 0; } |
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|
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#else |
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static int nvram_proc_read(struct seq_file *seq, void *offset) |
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{ unsigned char contents[NVRAM_BYTES]; |
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int i = 0; |
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spin_lock_irq(&rtc_lock); for (i = 0; i < NVRAM_BYTES; ++i) contents[i] = __nvram_read_byte(i); spin_unlock_irq(&rtc_lock); |
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mach_proc_infos(contents, seq, offset); |
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|
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return 0; } |
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|
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static int nvram_add_proc_fs(void) { |
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if (!proc_create_single("driver/nvram", 0, NULL, nvram_proc_read)) |
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return -ENOMEM; return 0; } |
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#endif /* CONFIG_PROC_FS */ |
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static const struct file_operations nvram_fops = { |
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.owner = THIS_MODULE, .llseek = nvram_llseek, .read = nvram_read, .write = nvram_write, |
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.unlocked_ioctl = nvram_ioctl, |
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.open = nvram_open, .release = nvram_release, }; static struct miscdevice nvram_dev = { NVRAM_MINOR, "nvram", &nvram_fops }; |
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static int __init nvram_init(void) |
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{ int ret; /* First test whether the driver should init at all */ if (!CHECK_DRIVER_INIT()) |
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return -ENODEV; |
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ret = misc_register(&nvram_dev); if (ret) { printk(KERN_ERR "nvram: can't misc_register on minor=%d ", NVRAM_MINOR); goto out; } |
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ret = nvram_add_proc_fs(); if (ret) { |
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printk(KERN_ERR "nvram: can't create /proc/driver/nvram "); |
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goto outmisc; } ret = 0; printk(KERN_INFO "Non-volatile memory driver v" NVRAM_VERSION " "); |
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out: |
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return ret; |
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outmisc: |
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misc_deregister(&nvram_dev); goto out; } |
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static void __exit nvram_cleanup_module(void) |
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{ remove_proc_entry("driver/nvram", NULL); misc_deregister(&nvram_dev); } module_init(nvram_init); module_exit(nvram_cleanup_module); /* * Machine specific functions */ #if MACH == PC |
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static int pc_check_checksum(void) |
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{ int i; unsigned short sum = 0; 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); |
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return (sum & 0xffff) == expect; |
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} |
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static void pc_set_checksum(void) |
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{ int i; unsigned short sum = 0; 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 |
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static const char * const floppy_types[] = { |
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"none", "5.25'' 360k", "5.25'' 1.2M", "3.5'' 720k", "3.5'' 1.44M", "3.5'' 2.88M", "3.5'' 2.88M" }; |
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static const char * const gfx_types[] = { |
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"EGA, VGA, ... (with BIOS)", "CGA (40 cols)", "CGA (80 cols)", "monochrome", }; |
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static void pc_proc_infos(unsigned char *nvram, struct seq_file *seq, void *offset) |
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{ int checksum; int type; spin_lock_irq(&rtc_lock); checksum = __nvram_check_checksum(); spin_unlock_irq(&rtc_lock); |
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seq_printf(seq, "Checksum status: %svalid ", checksum ? "" : "not "); |
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seq_printf(seq, "# floppies : %d ", |
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(nvram[6] & 1) ? (nvram[6] >> 6) + 1 : 0); |
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seq_printf(seq, "Floppy 0 type : "); |
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type = nvram[2] >> 4; |
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if (type < ARRAY_SIZE(floppy_types)) |
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seq_printf(seq, "%s ", floppy_types[type]); |
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else |
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seq_printf(seq, "%d (unknown) ", type); seq_printf(seq, "Floppy 1 type : "); |
1da177e4c Linux-2.6.12-rc2 |
500 |
type = nvram[2] & 0x0f; |
fe971071a [PATCH] drivers/c... |
501 |
if (type < ARRAY_SIZE(floppy_types)) |
8587b33f4 [PATCH] nvram - c... |
502 503 |
seq_printf(seq, "%s ", floppy_types[type]); |
1da177e4c Linux-2.6.12-rc2 |
504 |
else |
8587b33f4 [PATCH] nvram - c... |
505 506 |
seq_printf(seq, "%d (unknown) ", type); |
1da177e4c Linux-2.6.12-rc2 |
507 |
|
8587b33f4 [PATCH] nvram - c... |
508 |
seq_printf(seq, "HD 0 type : "); |
1da177e4c Linux-2.6.12-rc2 |
509 510 |
type = nvram[4] >> 4; if (type) |
8587b33f4 [PATCH] nvram - c... |
511 512 |
seq_printf(seq, "%02x ", type == 0x0f ? nvram[11] : type); |
1da177e4c Linux-2.6.12-rc2 |
513 |
else |
8587b33f4 [PATCH] nvram - c... |
514 515 |
seq_printf(seq, "none "); |
1da177e4c Linux-2.6.12-rc2 |
516 |
|
8587b33f4 [PATCH] nvram - c... |
517 |
seq_printf(seq, "HD 1 type : "); |
1da177e4c Linux-2.6.12-rc2 |
518 519 |
type = nvram[4] & 0x0f; if (type) |
8587b33f4 [PATCH] nvram - c... |
520 521 |
seq_printf(seq, "%02x ", type == 0x0f ? nvram[12] : type); |
1da177e4c Linux-2.6.12-rc2 |
522 |
else |
8587b33f4 [PATCH] nvram - c... |
523 524 |
seq_printf(seq, "none "); |
1da177e4c Linux-2.6.12-rc2 |
525 |
|
8587b33f4 [PATCH] nvram - c... |
526 527 |
seq_printf(seq, "HD type 48 data: %d/%d/%d C/H/S, precomp %d, lz %d ", |
1da177e4c Linux-2.6.12-rc2 |
528 529 530 |
nvram[18] | (nvram[19] << 8), nvram[20], nvram[25], nvram[21] | (nvram[22] << 8), nvram[23] | (nvram[24] << 8)); |
8587b33f4 [PATCH] nvram - c... |
531 532 |
seq_printf(seq, "HD type 49 data: %d/%d/%d C/H/S, precomp %d, lz %d ", |
1da177e4c Linux-2.6.12-rc2 |
533 534 535 |
nvram[39] | (nvram[40] << 8), nvram[41], nvram[46], nvram[42] | (nvram[43] << 8), nvram[44] | (nvram[45] << 8)); |
8587b33f4 [PATCH] nvram - c... |
536 537 538 539 |
seq_printf(seq, "DOS base memory: %d kB ", nvram[7] | (nvram[8] << 8)); seq_printf(seq, "Extended memory: %d kB (configured), %d kB (tested) ", |
1da177e4c Linux-2.6.12-rc2 |
540 |
nvram[9] | (nvram[10] << 8), nvram[34] | (nvram[35] << 8)); |
8587b33f4 [PATCH] nvram - c... |
541 542 543 |
seq_printf(seq, "Gfx adapter : %s ", gfx_types[(nvram[6] >> 4) & 3]); |
1da177e4c Linux-2.6.12-rc2 |
544 |
|
8587b33f4 [PATCH] nvram - c... |
545 546 |
seq_printf(seq, "FPU : %sinstalled ", |
1da177e4c Linux-2.6.12-rc2 |
547 |
(nvram[6] & 2) ? "" : "not "); |
8587b33f4 [PATCH] nvram - c... |
548 |
return; |
1da177e4c Linux-2.6.12-rc2 |
549 550 551 552 |
} #endif #endif /* MACH == PC */ |
1da177e4c Linux-2.6.12-rc2 |
553 |
#if MACH == ATARI |
971ddcf8a [PATCH] nvram - C... |
554 |
static int atari_check_checksum(void) |
1da177e4c Linux-2.6.12-rc2 |
555 556 557 558 559 560 |
{ int i; unsigned char sum = 0; for (i = ATARI_CKS_RANGE_START; i <= ATARI_CKS_RANGE_END; ++i) sum += __nvram_read_byte(i); |
971ddcf8a [PATCH] nvram - C... |
561 562 |
return (__nvram_read_byte(ATARI_CKS_LOC) == (~sum & 0xff)) && (__nvram_read_byte(ATARI_CKS_LOC + 1) == (sum & 0xff)); |
1da177e4c Linux-2.6.12-rc2 |
563 |
} |
971ddcf8a [PATCH] nvram - C... |
564 |
static void atari_set_checksum(void) |
1da177e4c Linux-2.6.12-rc2 |
565 566 567 568 569 570 571 572 573 574 575 576 577 578 |
{ int i; unsigned char sum = 0; 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 static struct { unsigned char val; |
a116eaf1b char/nvram: set a... |
579 |
const char *name; |
1da177e4c Linux-2.6.12-rc2 |
580 581 582 583 584 585 586 |
} boot_prefs[] = { { 0x80, "TOS" }, { 0x40, "ASV" }, { 0x20, "NetBSD (?)" }, { 0x10, "Linux" }, { 0x00, "unspecified" } }; |
a116eaf1b char/nvram: set a... |
587 |
static const char * const languages[] = { |
1da177e4c Linux-2.6.12-rc2 |
588 589 590 591 592 593 594 595 596 597 |
"English (US)", "German", "French", "English (UK)", "Spanish", "Italian", "6 (undefined)", "Swiss (French)", "Swiss (German)" }; |
a116eaf1b char/nvram: set a... |
598 |
static const char * const dateformat[] = { |
1da177e4c Linux-2.6.12-rc2 |
599 600 601 602 603 604 605 606 607 |
"MM%cDD%cYY", "DD%cMM%cYY", "YY%cMM%cDD", "YY%cDD%cMM", "4 (undefined)", "5 (undefined)", "6 (undefined)", "7 (undefined)" }; |
a116eaf1b char/nvram: set a... |
608 |
static const char * const colors[] = { |
1da177e4c Linux-2.6.12-rc2 |
609 610 |
"2", "4", "16", "256", "65536", "??", "??", "??" }; |
8587b33f4 [PATCH] nvram - c... |
611 612 |
static void atari_proc_infos(unsigned char *nvram, struct seq_file *seq, void *offset) |
1da177e4c Linux-2.6.12-rc2 |
613 614 615 616 |
{ int checksum = nvram_check_checksum(); int i; unsigned vmode; |
8587b33f4 [PATCH] nvram - c... |
617 618 |
seq_printf(seq, "Checksum status : %svalid ", checksum ? "" : "not "); |
1da177e4c Linux-2.6.12-rc2 |
619 |
|
8587b33f4 [PATCH] nvram - c... |
620 |
seq_printf(seq, "Boot preference : "); |
fe971071a [PATCH] drivers/c... |
621 |
for (i = ARRAY_SIZE(boot_prefs) - 1; i >= 0; --i) { |
1da177e4c Linux-2.6.12-rc2 |
622 |
if (nvram[1] == boot_prefs[i].val) { |
8587b33f4 [PATCH] nvram - c... |
623 624 |
seq_printf(seq, "%s ", boot_prefs[i].name); |
1da177e4c Linux-2.6.12-rc2 |
625 626 627 628 |
break; } } if (i < 0) |
8587b33f4 [PATCH] nvram - c... |
629 630 |
seq_printf(seq, "0x%02x (undefined) ", nvram[1]); |
1da177e4c Linux-2.6.12-rc2 |
631 |
|
8587b33f4 [PATCH] nvram - c... |
632 633 |
seq_printf(seq, "SCSI arbitration : %s ", |
1da177e4c Linux-2.6.12-rc2 |
634 |
(nvram[16] & 0x80) ? "on" : "off"); |
8587b33f4 [PATCH] nvram - c... |
635 |
seq_printf(seq, "SCSI host ID : "); |
1da177e4c Linux-2.6.12-rc2 |
636 |
if (nvram[16] & 0x80) |
8587b33f4 [PATCH] nvram - c... |
637 638 |
seq_printf(seq, "%d ", nvram[16] & 7); |
1da177e4c Linux-2.6.12-rc2 |
639 |
else |
8587b33f4 [PATCH] nvram - c... |
640 641 |
seq_printf(seq, "n/a "); |
1da177e4c Linux-2.6.12-rc2 |
642 643 644 |
/* the following entries are defined only for the Falcon */ if ((atari_mch_cookie >> 16) != ATARI_MCH_FALCON) |
8587b33f4 [PATCH] nvram - c... |
645 |
return; |
1da177e4c Linux-2.6.12-rc2 |
646 |
|
8587b33f4 [PATCH] nvram - c... |
647 |
seq_printf(seq, "OS language : "); |
fe971071a [PATCH] drivers/c... |
648 |
if (nvram[6] < ARRAY_SIZE(languages)) |
8587b33f4 [PATCH] nvram - c... |
649 650 |
seq_printf(seq, "%s ", languages[nvram[6]]); |
1da177e4c Linux-2.6.12-rc2 |
651 |
else |
8587b33f4 [PATCH] nvram - c... |
652 653 654 |
seq_printf(seq, "%u (undefined) ", nvram[6]); seq_printf(seq, "Keyboard language: "); |
fe971071a [PATCH] drivers/c... |
655 |
if (nvram[7] < ARRAY_SIZE(languages)) |
8587b33f4 [PATCH] nvram - c... |
656 657 |
seq_printf(seq, "%s ", languages[nvram[7]]); |
1da177e4c Linux-2.6.12-rc2 |
658 |
else |
8587b33f4 [PATCH] nvram - c... |
659 660 661 662 |
seq_printf(seq, "%u (undefined) ", nvram[7]); seq_printf(seq, "Date format : "); seq_printf(seq, dateformat[nvram[8] & 7], |
1da177e4c Linux-2.6.12-rc2 |
663 |
nvram[9] ? nvram[9] : '/', nvram[9] ? nvram[9] : '/'); |
8587b33f4 [PATCH] nvram - c... |
664 665 666 |
seq_printf(seq, ", %dh clock ", nvram[8] & 16 ? 24 : 12); seq_printf(seq, "Boot delay : "); |
1da177e4c Linux-2.6.12-rc2 |
667 |
if (nvram[10] == 0) |
8587b33f4 [PATCH] nvram - c... |
668 |
seq_printf(seq, "default"); |
1da177e4c Linux-2.6.12-rc2 |
669 |
else |
8587b33f4 [PATCH] nvram - c... |
670 671 |
seq_printf(seq, "%ds%s ", nvram[10], |
1da177e4c Linux-2.6.12-rc2 |
672 |
nvram[10] < 8 ? ", no memory test" : ""); |
d25ded8d3 char/nvram: Use b... |
673 |
vmode = (nvram[14] << 8) | nvram[15]; |
8587b33f4 [PATCH] nvram - c... |
674 675 676 |
seq_printf(seq, "Video mode : %s colors, %d columns, %s %s monitor ", |
1da177e4c Linux-2.6.12-rc2 |
677 678 679 |
colors[vmode & 7], vmode & 8 ? 80 : 40, vmode & 16 ? "VGA" : "TV", vmode & 32 ? "PAL" : "NTSC"); |
8587b33f4 [PATCH] nvram - c... |
680 681 |
seq_printf(seq, " %soverscan, compat. mode %s%s ", |
1da177e4c Linux-2.6.12-rc2 |
682 683 684 685 |
vmode & 64 ? "" : "no ", vmode & 128 ? "on" : "off", vmode & 256 ? (vmode & 16 ? ", line doubling" : ", half screen") : ""); |
8587b33f4 [PATCH] nvram - c... |
686 |
return; |
1da177e4c Linux-2.6.12-rc2 |
687 688 689 690 691 692 |
} #endif #endif /* MACH == ATARI */ MODULE_LICENSE("GPL"); |
1da177e4c Linux-2.6.12-rc2 |
693 |
MODULE_ALIAS_MISCDEV(NVRAM_MINOR); |