Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * CMOS/NV-RAM driver for Linux |
| 3 | * |
| 4 | * Copyright (C) 1997 Roman Hodek <Roman.Hodek@informatik.uni-erlangen.de> |
| 5 | * idea by and with help from Richard Jelinek <rj@suse.de> |
| 6 | * Portions copyright (c) 2001,2002 Sun Microsystems (thockin@sun.com) |
| 7 | * |
| 8 | * This driver allows you to access the contents of the non-volatile memory in |
| 9 | * the mc146818rtc.h real-time clock. This chip is built into all PCs and into |
| 10 | * many Atari machines. In the former it's called "CMOS-RAM", in the latter |
| 11 | * "NVRAM" (NV stands for non-volatile). |
| 12 | * |
| 13 | * The data are supplied as a (seekable) character device, /dev/nvram. The |
| 14 | * size of this file is dependent on the controller. The usual size is 114, |
| 15 | * the number of freely available bytes in the memory (i.e., not used by the |
| 16 | * RTC itself). |
| 17 | * |
| 18 | * Checksums over the NVRAM contents are managed by this driver. In case of a |
| 19 | * bad checksum, reads and writes return -EIO. The checksum can be initialized |
| 20 | * to a sane state either by ioctl(NVRAM_INIT) (clear whole NVRAM) or |
| 21 | * ioctl(NVRAM_SETCKS) (doesn't change contents, just makes checksum valid |
| 22 | * again; use with care!) |
| 23 | * |
| 24 | * This file also provides some functions for other parts of the kernel that |
| 25 | * want to access the NVRAM: nvram_{read,write,check_checksum,set_checksum}. |
| 26 | * Obviously this can be used only if this driver is always configured into |
| 27 | * the kernel and is not a module. Since the functions are used by some Atari |
| 28 | * drivers, this is the case on the Atari. |
| 29 | * |
| 30 | * |
| 31 | * 1.1 Cesar Barros: SMP locking fixes |
| 32 | * added changelog |
| 33 | * 1.2 Erik Gilling: Cobalt Networks support |
| 34 | * Tim Hockin: general cleanup, Cobalt support |
Wim Van Sebroeck | 8587b33f | 2008-11-11 09:56:00 +0000 | [diff] [blame] | 35 | * 1.3 Wim Van Sebroeck: convert PRINT_PROC to seq_file |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 36 | */ |
| 37 | |
Wim Van Sebroeck | 8587b33f | 2008-11-11 09:56:00 +0000 | [diff] [blame] | 38 | #define NVRAM_VERSION "1.3" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 39 | |
| 40 | #include <linux/module.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 41 | #include <linux/nvram.h> |
| 42 | |
| 43 | #define PC 1 |
| 44 | #define ATARI 2 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 45 | |
| 46 | /* select machine configuration */ |
| 47 | #if defined(CONFIG_ATARI) |
| 48 | # define MACH ATARI |
Wim Van Sebroeck | 971ddcf | 2008-11-11 09:44:07 +0000 | [diff] [blame] | 49 | #elif defined(__i386__) || defined(__x86_64__) || defined(__arm__) /* and ?? */ |
Robert P. J. Day | ea5a3dcf | 2007-07-15 23:41:04 -0700 | [diff] [blame] | 50 | # define MACH PC |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 51 | #else |
| 52 | # error Cannot build nvram driver for this machine configuration. |
| 53 | #endif |
| 54 | |
| 55 | #if MACH == PC |
| 56 | |
| 57 | /* RTC in a PC */ |
| 58 | #define CHECK_DRIVER_INIT() 1 |
| 59 | |
| 60 | /* On PCs, the checksum is built only over bytes 2..31 */ |
| 61 | #define PC_CKS_RANGE_START 2 |
| 62 | #define PC_CKS_RANGE_END 31 |
| 63 | #define PC_CKS_LOC 32 |
| 64 | #define NVRAM_BYTES (128-NVRAM_FIRST_BYTE) |
| 65 | |
| 66 | #define mach_check_checksum pc_check_checksum |
| 67 | #define mach_set_checksum pc_set_checksum |
| 68 | #define mach_proc_infos pc_proc_infos |
| 69 | |
| 70 | #endif |
| 71 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 72 | #if MACH == ATARI |
| 73 | |
| 74 | /* Special parameters for RTC in Atari machines */ |
| 75 | #include <asm/atarihw.h> |
| 76 | #include <asm/atariints.h> |
| 77 | #define RTC_PORT(x) (TT_RTC_BAS + 2*(x)) |
| 78 | #define CHECK_DRIVER_INIT() (MACH_IS_ATARI && ATARIHW_PRESENT(TT_CLK)) |
| 79 | |
| 80 | #define NVRAM_BYTES 50 |
| 81 | |
| 82 | /* On Ataris, the checksum is over all bytes except the checksum bytes |
| 83 | * themselves; these are at the very end */ |
| 84 | #define ATARI_CKS_RANGE_START 0 |
| 85 | #define ATARI_CKS_RANGE_END 47 |
| 86 | #define ATARI_CKS_LOC 48 |
| 87 | |
| 88 | #define mach_check_checksum atari_check_checksum |
| 89 | #define mach_set_checksum atari_set_checksum |
| 90 | #define mach_proc_infos atari_proc_infos |
| 91 | |
| 92 | #endif |
| 93 | |
| 94 | /* Note that *all* calls to CMOS_READ and CMOS_WRITE must be done with |
| 95 | * rtc_lock held. Due to the index-port/data-port design of the RTC, we |
| 96 | * don't want two different things trying to get to it at once. (e.g. the |
Michael Witten | 5196d20 | 2012-01-24 22:48:04 +0000 | [diff] [blame] | 97 | * periodic 11 min sync from kernel/time/ntp.c vs. this driver.) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 98 | */ |
| 99 | |
| 100 | #include <linux/types.h> |
| 101 | #include <linux/errno.h> |
| 102 | #include <linux/miscdevice.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 103 | #include <linux/ioport.h> |
| 104 | #include <linux/fcntl.h> |
| 105 | #include <linux/mc146818rtc.h> |
| 106 | #include <linux/init.h> |
| 107 | #include <linux/proc_fs.h> |
Wim Van Sebroeck | 8587b33f | 2008-11-11 09:56:00 +0000 | [diff] [blame] | 108 | #include <linux/seq_file.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 109 | #include <linux/spinlock.h> |
Wim Van Sebroeck | 971ddcf | 2008-11-11 09:44:07 +0000 | [diff] [blame] | 110 | #include <linux/io.h> |
| 111 | #include <linux/uaccess.h> |
Arnd Bergmann | 613655f | 2010-06-02 14:28:52 +0200 | [diff] [blame] | 112 | #include <linux/mutex.h> |
Al Viro | b808b1d | 2015-12-05 21:39:06 -0500 | [diff] [blame] | 113 | #include <linux/pagemap.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 114 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 115 | |
Arnd Bergmann | 613655f | 2010-06-02 14:28:52 +0200 | [diff] [blame] | 116 | static DEFINE_MUTEX(nvram_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 117 | static DEFINE_SPINLOCK(nvram_state_lock); |
| 118 | static int nvram_open_cnt; /* #times opened */ |
| 119 | static int nvram_open_mode; /* special open modes */ |
| 120 | #define NVRAM_WRITE 1 /* opened for writing (exclusive) */ |
| 121 | #define NVRAM_EXCL 2 /* opened with O_EXCL */ |
| 122 | |
| 123 | static int mach_check_checksum(void); |
| 124 | static void mach_set_checksum(void); |
| 125 | |
| 126 | #ifdef CONFIG_PROC_FS |
Wim Van Sebroeck | 8587b33f | 2008-11-11 09:56:00 +0000 | [diff] [blame] | 127 | static void mach_proc_infos(unsigned char *contents, struct seq_file *seq, |
| 128 | void *offset); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 129 | #endif |
| 130 | |
| 131 | /* |
| 132 | * These functions are provided to be called internally or by other parts of |
| 133 | * the kernel. It's up to the caller to ensure correct checksum before reading |
| 134 | * or after writing (needs to be done only once). |
| 135 | * |
| 136 | * It is worth noting that these functions all access bytes of general |
| 137 | * purpose memory in the NVRAM - that is to say, they all add the |
Wim Van Sebroeck | 971ddcf | 2008-11-11 09:44:07 +0000 | [diff] [blame] | 138 | * NVRAM_FIRST_BYTE offset. Pass them offsets into NVRAM as if you did not |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 139 | * know about the RTC cruft. |
| 140 | */ |
| 141 | |
Wim Van Sebroeck | 971ddcf | 2008-11-11 09:44:07 +0000 | [diff] [blame] | 142 | unsigned char __nvram_read_byte(int i) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 143 | { |
| 144 | return CMOS_READ(NVRAM_FIRST_BYTE + i); |
| 145 | } |
Wim Van Sebroeck | 971ddcf | 2008-11-11 09:44:07 +0000 | [diff] [blame] | 146 | EXPORT_SYMBOL(__nvram_read_byte); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 147 | |
Wim Van Sebroeck | 971ddcf | 2008-11-11 09:44:07 +0000 | [diff] [blame] | 148 | unsigned char nvram_read_byte(int i) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 149 | { |
| 150 | unsigned long flags; |
| 151 | unsigned char c; |
| 152 | |
| 153 | spin_lock_irqsave(&rtc_lock, flags); |
| 154 | c = __nvram_read_byte(i); |
| 155 | spin_unlock_irqrestore(&rtc_lock, flags); |
| 156 | return c; |
| 157 | } |
Wim Van Sebroeck | 971ddcf | 2008-11-11 09:44:07 +0000 | [diff] [blame] | 158 | EXPORT_SYMBOL(nvram_read_byte); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 159 | |
| 160 | /* This races nicely with trying to read with checksum checking (nvram_read) */ |
Wim Van Sebroeck | 971ddcf | 2008-11-11 09:44:07 +0000 | [diff] [blame] | 161 | void __nvram_write_byte(unsigned char c, int i) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 162 | { |
| 163 | CMOS_WRITE(c, NVRAM_FIRST_BYTE + i); |
| 164 | } |
Wim Van Sebroeck | 971ddcf | 2008-11-11 09:44:07 +0000 | [diff] [blame] | 165 | EXPORT_SYMBOL(__nvram_write_byte); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 166 | |
Wim Van Sebroeck | 971ddcf | 2008-11-11 09:44:07 +0000 | [diff] [blame] | 167 | void nvram_write_byte(unsigned char c, int i) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 168 | { |
| 169 | unsigned long flags; |
| 170 | |
| 171 | spin_lock_irqsave(&rtc_lock, flags); |
| 172 | __nvram_write_byte(c, i); |
| 173 | spin_unlock_irqrestore(&rtc_lock, flags); |
| 174 | } |
Wim Van Sebroeck | 971ddcf | 2008-11-11 09:44:07 +0000 | [diff] [blame] | 175 | EXPORT_SYMBOL(nvram_write_byte); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 176 | |
Wim Van Sebroeck | 971ddcf | 2008-11-11 09:44:07 +0000 | [diff] [blame] | 177 | int __nvram_check_checksum(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 178 | { |
| 179 | return mach_check_checksum(); |
| 180 | } |
Wim Van Sebroeck | 971ddcf | 2008-11-11 09:44:07 +0000 | [diff] [blame] | 181 | EXPORT_SYMBOL(__nvram_check_checksum); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 182 | |
Wim Van Sebroeck | 971ddcf | 2008-11-11 09:44:07 +0000 | [diff] [blame] | 183 | int nvram_check_checksum(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 184 | { |
| 185 | unsigned long flags; |
| 186 | int rv; |
| 187 | |
| 188 | spin_lock_irqsave(&rtc_lock, flags); |
| 189 | rv = __nvram_check_checksum(); |
| 190 | spin_unlock_irqrestore(&rtc_lock, flags); |
| 191 | return rv; |
| 192 | } |
Wim Van Sebroeck | 971ddcf | 2008-11-11 09:44:07 +0000 | [diff] [blame] | 193 | EXPORT_SYMBOL(nvram_check_checksum); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 194 | |
Wim Van Sebroeck | 971ddcf | 2008-11-11 09:44:07 +0000 | [diff] [blame] | 195 | static void __nvram_set_checksum(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 196 | { |
| 197 | mach_set_checksum(); |
| 198 | } |
| 199 | |
Adrian Bunk | 681ea4b | 2005-06-25 14:59:04 -0700 | [diff] [blame] | 200 | #if 0 |
Wim Van Sebroeck | 971ddcf | 2008-11-11 09:44:07 +0000 | [diff] [blame] | 201 | void nvram_set_checksum(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 202 | { |
| 203 | unsigned long flags; |
| 204 | |
| 205 | spin_lock_irqsave(&rtc_lock, flags); |
| 206 | __nvram_set_checksum(); |
| 207 | spin_unlock_irqrestore(&rtc_lock, flags); |
| 208 | } |
Adrian Bunk | 681ea4b | 2005-06-25 14:59:04 -0700 | [diff] [blame] | 209 | #endif /* 0 */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 210 | |
| 211 | /* |
| 212 | * The are the file operation function for user access to /dev/nvram |
| 213 | */ |
| 214 | |
Wim Van Sebroeck | 971ddcf | 2008-11-11 09:44:07 +0000 | [diff] [blame] | 215 | static loff_t nvram_llseek(struct file *file, loff_t offset, int origin) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 216 | { |
Al Viro | b808b1d | 2015-12-05 21:39:06 -0500 | [diff] [blame] | 217 | return generic_file_llseek_size(file, offset, origin, MAX_LFS_FILESIZE, |
| 218 | NVRAM_BYTES); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 219 | } |
| 220 | |
Wim Van Sebroeck | 971ddcf | 2008-11-11 09:44:07 +0000 | [diff] [blame] | 221 | static ssize_t nvram_read(struct file *file, char __user *buf, |
| 222 | size_t count, loff_t *ppos) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 223 | { |
| 224 | unsigned char contents[NVRAM_BYTES]; |
| 225 | unsigned i = *ppos; |
| 226 | unsigned char *tmp; |
| 227 | |
| 228 | spin_lock_irq(&rtc_lock); |
| 229 | |
| 230 | if (!__nvram_check_checksum()) |
| 231 | goto checksum_err; |
| 232 | |
| 233 | for (tmp = contents; count-- > 0 && i < NVRAM_BYTES; ++i, ++tmp) |
| 234 | *tmp = __nvram_read_byte(i); |
| 235 | |
| 236 | spin_unlock_irq(&rtc_lock); |
| 237 | |
| 238 | if (copy_to_user(buf, contents, tmp - contents)) |
| 239 | return -EFAULT; |
| 240 | |
| 241 | *ppos = i; |
| 242 | |
| 243 | return tmp - contents; |
| 244 | |
Wim Van Sebroeck | 971ddcf | 2008-11-11 09:44:07 +0000 | [diff] [blame] | 245 | checksum_err: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 246 | spin_unlock_irq(&rtc_lock); |
| 247 | return -EIO; |
| 248 | } |
| 249 | |
Wim Van Sebroeck | 971ddcf | 2008-11-11 09:44:07 +0000 | [diff] [blame] | 250 | static ssize_t nvram_write(struct file *file, const char __user *buf, |
| 251 | size_t count, loff_t *ppos) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 252 | { |
| 253 | unsigned char contents[NVRAM_BYTES]; |
| 254 | unsigned i = *ppos; |
| 255 | unsigned char *tmp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 256 | |
H. Peter Anvin | a01c780 | 2009-12-11 15:48:23 -0800 | [diff] [blame] | 257 | if (i >= NVRAM_BYTES) |
| 258 | return 0; /* Past EOF */ |
| 259 | |
| 260 | if (count > NVRAM_BYTES - i) |
| 261 | count = NVRAM_BYTES - i; |
| 262 | if (count > NVRAM_BYTES) |
| 263 | return -EFAULT; /* Can't happen, but prove it to gcc */ |
| 264 | |
| 265 | if (copy_from_user(contents, buf, count)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 266 | return -EFAULT; |
| 267 | |
| 268 | spin_lock_irq(&rtc_lock); |
| 269 | |
| 270 | if (!__nvram_check_checksum()) |
| 271 | goto checksum_err; |
| 272 | |
H. Peter Anvin | a01c780 | 2009-12-11 15:48:23 -0800 | [diff] [blame] | 273 | for (tmp = contents; count--; ++i, ++tmp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 274 | __nvram_write_byte(*tmp, i); |
| 275 | |
| 276 | __nvram_set_checksum(); |
| 277 | |
| 278 | spin_unlock_irq(&rtc_lock); |
| 279 | |
| 280 | *ppos = i; |
| 281 | |
| 282 | return tmp - contents; |
| 283 | |
Wim Van Sebroeck | 971ddcf | 2008-11-11 09:44:07 +0000 | [diff] [blame] | 284 | checksum_err: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 285 | spin_unlock_irq(&rtc_lock); |
| 286 | return -EIO; |
| 287 | } |
| 288 | |
Arnd Bergmann | 5592933 | 2010-04-27 00:24:05 +0200 | [diff] [blame] | 289 | static long nvram_ioctl(struct file *file, unsigned int cmd, |
| 290 | unsigned long arg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 291 | { |
| 292 | int i; |
| 293 | |
| 294 | switch (cmd) { |
| 295 | |
| 296 | case NVRAM_INIT: |
| 297 | /* initialize NVRAM contents and checksum */ |
| 298 | if (!capable(CAP_SYS_ADMIN)) |
| 299 | return -EACCES; |
| 300 | |
Arnd Bergmann | 613655f | 2010-06-02 14:28:52 +0200 | [diff] [blame] | 301 | mutex_lock(&nvram_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 302 | spin_lock_irq(&rtc_lock); |
| 303 | |
| 304 | for (i = 0; i < NVRAM_BYTES; ++i) |
| 305 | __nvram_write_byte(0, i); |
| 306 | __nvram_set_checksum(); |
| 307 | |
| 308 | spin_unlock_irq(&rtc_lock); |
Arnd Bergmann | 613655f | 2010-06-02 14:28:52 +0200 | [diff] [blame] | 309 | mutex_unlock(&nvram_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 310 | return 0; |
| 311 | |
| 312 | case NVRAM_SETCKS: |
Wim Van Sebroeck | 971ddcf | 2008-11-11 09:44:07 +0000 | [diff] [blame] | 313 | /* just set checksum, contents unchanged (maybe useful after |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 314 | * checksum garbaged somehow...) */ |
| 315 | if (!capable(CAP_SYS_ADMIN)) |
| 316 | return -EACCES; |
| 317 | |
Arnd Bergmann | 613655f | 2010-06-02 14:28:52 +0200 | [diff] [blame] | 318 | mutex_lock(&nvram_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 319 | spin_lock_irq(&rtc_lock); |
| 320 | __nvram_set_checksum(); |
| 321 | spin_unlock_irq(&rtc_lock); |
Arnd Bergmann | 613655f | 2010-06-02 14:28:52 +0200 | [diff] [blame] | 322 | mutex_unlock(&nvram_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 323 | return 0; |
| 324 | |
| 325 | default: |
| 326 | return -ENOTTY; |
| 327 | } |
| 328 | } |
| 329 | |
Wim Van Sebroeck | 971ddcf | 2008-11-11 09:44:07 +0000 | [diff] [blame] | 330 | static int nvram_open(struct inode *inode, struct file *file) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 331 | { |
| 332 | spin_lock(&nvram_state_lock); |
| 333 | |
| 334 | if ((nvram_open_cnt && (file->f_flags & O_EXCL)) || |
| 335 | (nvram_open_mode & NVRAM_EXCL) || |
Al Viro | aeb5d72 | 2008-09-02 15:28:45 -0400 | [diff] [blame] | 336 | ((file->f_mode & FMODE_WRITE) && (nvram_open_mode & NVRAM_WRITE))) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 337 | spin_unlock(&nvram_state_lock); |
| 338 | return -EBUSY; |
| 339 | } |
| 340 | |
| 341 | if (file->f_flags & O_EXCL) |
| 342 | nvram_open_mode |= NVRAM_EXCL; |
Al Viro | aeb5d72 | 2008-09-02 15:28:45 -0400 | [diff] [blame] | 343 | if (file->f_mode & FMODE_WRITE) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 344 | nvram_open_mode |= NVRAM_WRITE; |
| 345 | nvram_open_cnt++; |
| 346 | |
| 347 | spin_unlock(&nvram_state_lock); |
| 348 | |
| 349 | return 0; |
| 350 | } |
| 351 | |
Wim Van Sebroeck | 971ddcf | 2008-11-11 09:44:07 +0000 | [diff] [blame] | 352 | static int nvram_release(struct inode *inode, struct file *file) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 353 | { |
| 354 | spin_lock(&nvram_state_lock); |
| 355 | |
| 356 | nvram_open_cnt--; |
| 357 | |
| 358 | /* if only one instance is open, clear the EXCL bit */ |
| 359 | if (nvram_open_mode & NVRAM_EXCL) |
| 360 | nvram_open_mode &= ~NVRAM_EXCL; |
Al Viro | aeb5d72 | 2008-09-02 15:28:45 -0400 | [diff] [blame] | 361 | if (file->f_mode & FMODE_WRITE) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 362 | nvram_open_mode &= ~NVRAM_WRITE; |
| 363 | |
| 364 | spin_unlock(&nvram_state_lock); |
| 365 | |
| 366 | return 0; |
| 367 | } |
| 368 | |
| 369 | #ifndef CONFIG_PROC_FS |
Wim Van Sebroeck | 8587b33f | 2008-11-11 09:56:00 +0000 | [diff] [blame] | 370 | static int nvram_add_proc_fs(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 371 | { |
| 372 | return 0; |
| 373 | } |
Wim Van Sebroeck | 8587b33f | 2008-11-11 09:56:00 +0000 | [diff] [blame] | 374 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 375 | #else |
| 376 | |
Wim Van Sebroeck | 8587b33f | 2008-11-11 09:56:00 +0000 | [diff] [blame] | 377 | static int nvram_proc_read(struct seq_file *seq, void *offset) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 378 | { |
| 379 | unsigned char contents[NVRAM_BYTES]; |
Wim Van Sebroeck | 8587b33f | 2008-11-11 09:56:00 +0000 | [diff] [blame] | 380 | int i = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 381 | |
| 382 | spin_lock_irq(&rtc_lock); |
| 383 | for (i = 0; i < NVRAM_BYTES; ++i) |
| 384 | contents[i] = __nvram_read_byte(i); |
| 385 | spin_unlock_irq(&rtc_lock); |
| 386 | |
Wim Van Sebroeck | 8587b33f | 2008-11-11 09:56:00 +0000 | [diff] [blame] | 387 | mach_proc_infos(contents, seq, offset); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 388 | |
Wim Van Sebroeck | 8587b33f | 2008-11-11 09:56:00 +0000 | [diff] [blame] | 389 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 390 | } |
| 391 | |
Wim Van Sebroeck | 8587b33f | 2008-11-11 09:56:00 +0000 | [diff] [blame] | 392 | static int nvram_proc_open(struct inode *inode, struct file *file) |
| 393 | { |
| 394 | return single_open(file, nvram_proc_read, NULL); |
| 395 | } |
| 396 | |
| 397 | static const struct file_operations nvram_proc_fops = { |
| 398 | .owner = THIS_MODULE, |
| 399 | .open = nvram_proc_open, |
| 400 | .read = seq_read, |
| 401 | .llseek = seq_lseek, |
| 402 | .release = single_release, |
| 403 | }; |
| 404 | |
| 405 | static int nvram_add_proc_fs(void) |
| 406 | { |
| 407 | if (!proc_create("driver/nvram", 0, NULL, &nvram_proc_fops)) |
| 408 | return -ENOMEM; |
| 409 | return 0; |
| 410 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 411 | |
| 412 | #endif /* CONFIG_PROC_FS */ |
| 413 | |
Arjan van de Ven | 62322d2 | 2006-07-03 00:24:21 -0700 | [diff] [blame] | 414 | static const struct file_operations nvram_fops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 415 | .owner = THIS_MODULE, |
| 416 | .llseek = nvram_llseek, |
| 417 | .read = nvram_read, |
| 418 | .write = nvram_write, |
Arnd Bergmann | 5592933 | 2010-04-27 00:24:05 +0200 | [diff] [blame] | 419 | .unlocked_ioctl = nvram_ioctl, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 420 | .open = nvram_open, |
| 421 | .release = nvram_release, |
| 422 | }; |
| 423 | |
| 424 | static struct miscdevice nvram_dev = { |
| 425 | NVRAM_MINOR, |
| 426 | "nvram", |
| 427 | &nvram_fops |
| 428 | }; |
| 429 | |
Wim Van Sebroeck | 971ddcf | 2008-11-11 09:44:07 +0000 | [diff] [blame] | 430 | static int __init nvram_init(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 431 | { |
| 432 | int ret; |
| 433 | |
| 434 | /* First test whether the driver should init at all */ |
| 435 | if (!CHECK_DRIVER_INIT()) |
Geert Uytterhoeven | e945b56 | 2008-07-17 21:16:10 +0200 | [diff] [blame] | 436 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 437 | |
| 438 | ret = misc_register(&nvram_dev); |
| 439 | if (ret) { |
| 440 | printk(KERN_ERR "nvram: can't misc_register on minor=%d\n", |
| 441 | NVRAM_MINOR); |
| 442 | goto out; |
| 443 | } |
Wim Van Sebroeck | 8587b33f | 2008-11-11 09:56:00 +0000 | [diff] [blame] | 444 | ret = nvram_add_proc_fs(); |
| 445 | if (ret) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 446 | printk(KERN_ERR "nvram: can't create /proc/driver/nvram\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 447 | goto outmisc; |
| 448 | } |
| 449 | ret = 0; |
| 450 | printk(KERN_INFO "Non-volatile memory driver v" NVRAM_VERSION "\n"); |
Wim Van Sebroeck | 971ddcf | 2008-11-11 09:44:07 +0000 | [diff] [blame] | 451 | out: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 452 | return ret; |
Wim Van Sebroeck | 971ddcf | 2008-11-11 09:44:07 +0000 | [diff] [blame] | 453 | outmisc: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 454 | misc_deregister(&nvram_dev); |
| 455 | goto out; |
| 456 | } |
| 457 | |
Wim Van Sebroeck | 971ddcf | 2008-11-11 09:44:07 +0000 | [diff] [blame] | 458 | static void __exit nvram_cleanup_module(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 459 | { |
| 460 | remove_proc_entry("driver/nvram", NULL); |
| 461 | misc_deregister(&nvram_dev); |
| 462 | } |
| 463 | |
| 464 | module_init(nvram_init); |
| 465 | module_exit(nvram_cleanup_module); |
| 466 | |
| 467 | /* |
| 468 | * Machine specific functions |
| 469 | */ |
| 470 | |
| 471 | #if MACH == PC |
| 472 | |
Wim Van Sebroeck | 971ddcf | 2008-11-11 09:44:07 +0000 | [diff] [blame] | 473 | static int pc_check_checksum(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 474 | { |
| 475 | int i; |
| 476 | unsigned short sum = 0; |
| 477 | unsigned short expect; |
| 478 | |
| 479 | for (i = PC_CKS_RANGE_START; i <= PC_CKS_RANGE_END; ++i) |
| 480 | sum += __nvram_read_byte(i); |
| 481 | expect = __nvram_read_byte(PC_CKS_LOC)<<8 | |
| 482 | __nvram_read_byte(PC_CKS_LOC+1); |
Wim Van Sebroeck | 971ddcf | 2008-11-11 09:44:07 +0000 | [diff] [blame] | 483 | return (sum & 0xffff) == expect; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 484 | } |
| 485 | |
Wim Van Sebroeck | 971ddcf | 2008-11-11 09:44:07 +0000 | [diff] [blame] | 486 | static void pc_set_checksum(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 487 | { |
| 488 | int i; |
| 489 | unsigned short sum = 0; |
| 490 | |
| 491 | for (i = PC_CKS_RANGE_START; i <= PC_CKS_RANGE_END; ++i) |
| 492 | sum += __nvram_read_byte(i); |
| 493 | __nvram_write_byte(sum >> 8, PC_CKS_LOC); |
| 494 | __nvram_write_byte(sum & 0xff, PC_CKS_LOC + 1); |
| 495 | } |
| 496 | |
| 497 | #ifdef CONFIG_PROC_FS |
| 498 | |
| 499 | static char *floppy_types[] = { |
| 500 | "none", "5.25'' 360k", "5.25'' 1.2M", "3.5'' 720k", "3.5'' 1.44M", |
| 501 | "3.5'' 2.88M", "3.5'' 2.88M" |
| 502 | }; |
| 503 | |
| 504 | static char *gfx_types[] = { |
| 505 | "EGA, VGA, ... (with BIOS)", |
| 506 | "CGA (40 cols)", |
| 507 | "CGA (80 cols)", |
| 508 | "monochrome", |
| 509 | }; |
| 510 | |
Wim Van Sebroeck | 8587b33f | 2008-11-11 09:56:00 +0000 | [diff] [blame] | 511 | static void pc_proc_infos(unsigned char *nvram, struct seq_file *seq, |
| 512 | void *offset) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 513 | { |
| 514 | int checksum; |
| 515 | int type; |
| 516 | |
| 517 | spin_lock_irq(&rtc_lock); |
| 518 | checksum = __nvram_check_checksum(); |
| 519 | spin_unlock_irq(&rtc_lock); |
| 520 | |
Wim Van Sebroeck | 8587b33f | 2008-11-11 09:56:00 +0000 | [diff] [blame] | 521 | seq_printf(seq, "Checksum status: %svalid\n", checksum ? "" : "not "); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 522 | |
Wim Van Sebroeck | 8587b33f | 2008-11-11 09:56:00 +0000 | [diff] [blame] | 523 | seq_printf(seq, "# floppies : %d\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 524 | (nvram[6] & 1) ? (nvram[6] >> 6) + 1 : 0); |
Wim Van Sebroeck | 8587b33f | 2008-11-11 09:56:00 +0000 | [diff] [blame] | 525 | seq_printf(seq, "Floppy 0 type : "); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 526 | type = nvram[2] >> 4; |
Tobias Klauser | fe97107 | 2006-01-09 20:54:02 -0800 | [diff] [blame] | 527 | if (type < ARRAY_SIZE(floppy_types)) |
Wim Van Sebroeck | 8587b33f | 2008-11-11 09:56:00 +0000 | [diff] [blame] | 528 | seq_printf(seq, "%s\n", floppy_types[type]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 529 | else |
Wim Van Sebroeck | 8587b33f | 2008-11-11 09:56:00 +0000 | [diff] [blame] | 530 | seq_printf(seq, "%d (unknown)\n", type); |
| 531 | seq_printf(seq, "Floppy 1 type : "); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 532 | type = nvram[2] & 0x0f; |
Tobias Klauser | fe97107 | 2006-01-09 20:54:02 -0800 | [diff] [blame] | 533 | if (type < ARRAY_SIZE(floppy_types)) |
Wim Van Sebroeck | 8587b33f | 2008-11-11 09:56:00 +0000 | [diff] [blame] | 534 | seq_printf(seq, "%s\n", floppy_types[type]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 535 | else |
Wim Van Sebroeck | 8587b33f | 2008-11-11 09:56:00 +0000 | [diff] [blame] | 536 | seq_printf(seq, "%d (unknown)\n", type); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 537 | |
Wim Van Sebroeck | 8587b33f | 2008-11-11 09:56:00 +0000 | [diff] [blame] | 538 | seq_printf(seq, "HD 0 type : "); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 539 | type = nvram[4] >> 4; |
| 540 | if (type) |
Wim Van Sebroeck | 8587b33f | 2008-11-11 09:56:00 +0000 | [diff] [blame] | 541 | seq_printf(seq, "%02x\n", type == 0x0f ? nvram[11] : type); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 542 | else |
Wim Van Sebroeck | 8587b33f | 2008-11-11 09:56:00 +0000 | [diff] [blame] | 543 | seq_printf(seq, "none\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 544 | |
Wim Van Sebroeck | 8587b33f | 2008-11-11 09:56:00 +0000 | [diff] [blame] | 545 | seq_printf(seq, "HD 1 type : "); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 546 | type = nvram[4] & 0x0f; |
| 547 | if (type) |
Wim Van Sebroeck | 8587b33f | 2008-11-11 09:56:00 +0000 | [diff] [blame] | 548 | seq_printf(seq, "%02x\n", type == 0x0f ? nvram[12] : type); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 549 | else |
Wim Van Sebroeck | 8587b33f | 2008-11-11 09:56:00 +0000 | [diff] [blame] | 550 | seq_printf(seq, "none\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 551 | |
Wim Van Sebroeck | 8587b33f | 2008-11-11 09:56:00 +0000 | [diff] [blame] | 552 | seq_printf(seq, "HD type 48 data: %d/%d/%d C/H/S, precomp %d, lz %d\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 553 | nvram[18] | (nvram[19] << 8), |
| 554 | nvram[20], nvram[25], |
| 555 | nvram[21] | (nvram[22] << 8), nvram[23] | (nvram[24] << 8)); |
Wim Van Sebroeck | 8587b33f | 2008-11-11 09:56:00 +0000 | [diff] [blame] | 556 | seq_printf(seq, "HD type 49 data: %d/%d/%d C/H/S, precomp %d, lz %d\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 557 | nvram[39] | (nvram[40] << 8), |
| 558 | nvram[41], nvram[46], |
| 559 | nvram[42] | (nvram[43] << 8), nvram[44] | (nvram[45] << 8)); |
| 560 | |
Wim Van Sebroeck | 8587b33f | 2008-11-11 09:56:00 +0000 | [diff] [blame] | 561 | seq_printf(seq, "DOS base memory: %d kB\n", nvram[7] | (nvram[8] << 8)); |
| 562 | seq_printf(seq, "Extended memory: %d kB (configured), %d kB (tested)\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 563 | nvram[9] | (nvram[10] << 8), nvram[34] | (nvram[35] << 8)); |
| 564 | |
Wim Van Sebroeck | 8587b33f | 2008-11-11 09:56:00 +0000 | [diff] [blame] | 565 | seq_printf(seq, "Gfx adapter : %s\n", |
| 566 | gfx_types[(nvram[6] >> 4) & 3]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 567 | |
Wim Van Sebroeck | 8587b33f | 2008-11-11 09:56:00 +0000 | [diff] [blame] | 568 | seq_printf(seq, "FPU : %sinstalled\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 569 | (nvram[6] & 2) ? "" : "not "); |
| 570 | |
Wim Van Sebroeck | 8587b33f | 2008-11-11 09:56:00 +0000 | [diff] [blame] | 571 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 572 | } |
| 573 | #endif |
| 574 | |
| 575 | #endif /* MACH == PC */ |
| 576 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 577 | #if MACH == ATARI |
| 578 | |
Wim Van Sebroeck | 971ddcf | 2008-11-11 09:44:07 +0000 | [diff] [blame] | 579 | static int atari_check_checksum(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 580 | { |
| 581 | int i; |
| 582 | unsigned char sum = 0; |
| 583 | |
| 584 | for (i = ATARI_CKS_RANGE_START; i <= ATARI_CKS_RANGE_END; ++i) |
| 585 | sum += __nvram_read_byte(i); |
Wim Van Sebroeck | 971ddcf | 2008-11-11 09:44:07 +0000 | [diff] [blame] | 586 | return (__nvram_read_byte(ATARI_CKS_LOC) == (~sum & 0xff)) && |
| 587 | (__nvram_read_byte(ATARI_CKS_LOC + 1) == (sum & 0xff)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 588 | } |
| 589 | |
Wim Van Sebroeck | 971ddcf | 2008-11-11 09:44:07 +0000 | [diff] [blame] | 590 | static void atari_set_checksum(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 591 | { |
| 592 | int i; |
| 593 | unsigned char sum = 0; |
| 594 | |
| 595 | for (i = ATARI_CKS_RANGE_START; i <= ATARI_CKS_RANGE_END; ++i) |
| 596 | sum += __nvram_read_byte(i); |
| 597 | __nvram_write_byte(~sum, ATARI_CKS_LOC); |
| 598 | __nvram_write_byte(sum, ATARI_CKS_LOC + 1); |
| 599 | } |
| 600 | |
| 601 | #ifdef CONFIG_PROC_FS |
| 602 | |
| 603 | static struct { |
| 604 | unsigned char val; |
| 605 | char *name; |
| 606 | } boot_prefs[] = { |
| 607 | { 0x80, "TOS" }, |
| 608 | { 0x40, "ASV" }, |
| 609 | { 0x20, "NetBSD (?)" }, |
| 610 | { 0x10, "Linux" }, |
| 611 | { 0x00, "unspecified" } |
| 612 | }; |
| 613 | |
| 614 | static char *languages[] = { |
| 615 | "English (US)", |
| 616 | "German", |
| 617 | "French", |
| 618 | "English (UK)", |
| 619 | "Spanish", |
| 620 | "Italian", |
| 621 | "6 (undefined)", |
| 622 | "Swiss (French)", |
| 623 | "Swiss (German)" |
| 624 | }; |
| 625 | |
| 626 | static char *dateformat[] = { |
| 627 | "MM%cDD%cYY", |
| 628 | "DD%cMM%cYY", |
| 629 | "YY%cMM%cDD", |
| 630 | "YY%cDD%cMM", |
| 631 | "4 (undefined)", |
| 632 | "5 (undefined)", |
| 633 | "6 (undefined)", |
| 634 | "7 (undefined)" |
| 635 | }; |
| 636 | |
| 637 | static char *colors[] = { |
| 638 | "2", "4", "16", "256", "65536", "??", "??", "??" |
| 639 | }; |
| 640 | |
Wim Van Sebroeck | 8587b33f | 2008-11-11 09:56:00 +0000 | [diff] [blame] | 641 | static void atari_proc_infos(unsigned char *nvram, struct seq_file *seq, |
| 642 | void *offset) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 643 | { |
| 644 | int checksum = nvram_check_checksum(); |
| 645 | int i; |
| 646 | unsigned vmode; |
| 647 | |
Wim Van Sebroeck | 8587b33f | 2008-11-11 09:56:00 +0000 | [diff] [blame] | 648 | seq_printf(seq, "Checksum status : %svalid\n", checksum ? "" : "not "); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 649 | |
Wim Van Sebroeck | 8587b33f | 2008-11-11 09:56:00 +0000 | [diff] [blame] | 650 | seq_printf(seq, "Boot preference : "); |
Tobias Klauser | fe97107 | 2006-01-09 20:54:02 -0800 | [diff] [blame] | 651 | for (i = ARRAY_SIZE(boot_prefs) - 1; i >= 0; --i) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 652 | if (nvram[1] == boot_prefs[i].val) { |
Wim Van Sebroeck | 8587b33f | 2008-11-11 09:56:00 +0000 | [diff] [blame] | 653 | seq_printf(seq, "%s\n", boot_prefs[i].name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 654 | break; |
| 655 | } |
| 656 | } |
| 657 | if (i < 0) |
Wim Van Sebroeck | 8587b33f | 2008-11-11 09:56:00 +0000 | [diff] [blame] | 658 | seq_printf(seq, "0x%02x (undefined)\n", nvram[1]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 659 | |
Wim Van Sebroeck | 8587b33f | 2008-11-11 09:56:00 +0000 | [diff] [blame] | 660 | seq_printf(seq, "SCSI arbitration : %s\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 661 | (nvram[16] & 0x80) ? "on" : "off"); |
Wim Van Sebroeck | 8587b33f | 2008-11-11 09:56:00 +0000 | [diff] [blame] | 662 | seq_printf(seq, "SCSI host ID : "); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 663 | if (nvram[16] & 0x80) |
Wim Van Sebroeck | 8587b33f | 2008-11-11 09:56:00 +0000 | [diff] [blame] | 664 | seq_printf(seq, "%d\n", nvram[16] & 7); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 665 | else |
Wim Van Sebroeck | 8587b33f | 2008-11-11 09:56:00 +0000 | [diff] [blame] | 666 | seq_printf(seq, "n/a\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 667 | |
| 668 | /* the following entries are defined only for the Falcon */ |
| 669 | if ((atari_mch_cookie >> 16) != ATARI_MCH_FALCON) |
Wim Van Sebroeck | 8587b33f | 2008-11-11 09:56:00 +0000 | [diff] [blame] | 670 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 671 | |
Wim Van Sebroeck | 8587b33f | 2008-11-11 09:56:00 +0000 | [diff] [blame] | 672 | seq_printf(seq, "OS language : "); |
Tobias Klauser | fe97107 | 2006-01-09 20:54:02 -0800 | [diff] [blame] | 673 | if (nvram[6] < ARRAY_SIZE(languages)) |
Wim Van Sebroeck | 8587b33f | 2008-11-11 09:56:00 +0000 | [diff] [blame] | 674 | seq_printf(seq, "%s\n", languages[nvram[6]]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 675 | else |
Wim Van Sebroeck | 8587b33f | 2008-11-11 09:56:00 +0000 | [diff] [blame] | 676 | seq_printf(seq, "%u (undefined)\n", nvram[6]); |
| 677 | seq_printf(seq, "Keyboard language: "); |
Tobias Klauser | fe97107 | 2006-01-09 20:54:02 -0800 | [diff] [blame] | 678 | if (nvram[7] < ARRAY_SIZE(languages)) |
Wim Van Sebroeck | 8587b33f | 2008-11-11 09:56:00 +0000 | [diff] [blame] | 679 | seq_printf(seq, "%s\n", languages[nvram[7]]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 680 | else |
Wim Van Sebroeck | 8587b33f | 2008-11-11 09:56:00 +0000 | [diff] [blame] | 681 | seq_printf(seq, "%u (undefined)\n", nvram[7]); |
| 682 | seq_printf(seq, "Date format : "); |
| 683 | seq_printf(seq, dateformat[nvram[8] & 7], |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 684 | nvram[9] ? nvram[9] : '/', nvram[9] ? nvram[9] : '/'); |
Wim Van Sebroeck | 8587b33f | 2008-11-11 09:56:00 +0000 | [diff] [blame] | 685 | seq_printf(seq, ", %dh clock\n", nvram[8] & 16 ? 24 : 12); |
| 686 | seq_printf(seq, "Boot delay : "); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 687 | if (nvram[10] == 0) |
Wim Van Sebroeck | 8587b33f | 2008-11-11 09:56:00 +0000 | [diff] [blame] | 688 | seq_printf(seq, "default"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 689 | else |
Wim Van Sebroeck | 8587b33f | 2008-11-11 09:56:00 +0000 | [diff] [blame] | 690 | seq_printf(seq, "%ds%s\n", nvram[10], |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 691 | nvram[10] < 8 ? ", no memory test" : ""); |
| 692 | |
Finn Thain | d25ded8 | 2015-07-03 13:35:36 +1000 | [diff] [blame] | 693 | vmode = (nvram[14] << 8) | nvram[15]; |
Wim Van Sebroeck | 8587b33f | 2008-11-11 09:56:00 +0000 | [diff] [blame] | 694 | seq_printf(seq, |
| 695 | "Video mode : %s colors, %d columns, %s %s monitor\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 696 | colors[vmode & 7], |
| 697 | vmode & 8 ? 80 : 40, |
| 698 | vmode & 16 ? "VGA" : "TV", vmode & 32 ? "PAL" : "NTSC"); |
Wim Van Sebroeck | 8587b33f | 2008-11-11 09:56:00 +0000 | [diff] [blame] | 699 | seq_printf(seq, " %soverscan, compat. mode %s%s\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 700 | vmode & 64 ? "" : "no ", |
| 701 | vmode & 128 ? "on" : "off", |
| 702 | vmode & 256 ? |
| 703 | (vmode & 16 ? ", line doubling" : ", half screen") : ""); |
| 704 | |
Wim Van Sebroeck | 8587b33f | 2008-11-11 09:56:00 +0000 | [diff] [blame] | 705 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 706 | } |
| 707 | #endif |
| 708 | |
| 709 | #endif /* MACH == ATARI */ |
| 710 | |
| 711 | MODULE_LICENSE("GPL"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 712 | MODULE_ALIAS_MISCDEV(NVRAM_MINOR); |