2 * CMOS/NV-RAM driver for Linux
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)
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).
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
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!)
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.
31 * 1.1 Cesar Barros: SMP locking fixes
33 * 1.2 Erik Gilling: Cobalt Networks support
34 * Tim Hockin: general cleanup, Cobalt support
37 #define NVRAM_VERSION "1.2"
39 #include <linux/module.h>
40 #include <linux/config.h>
41 #include <linux/sched.h>
42 #include <linux/smp_lock.h>
43 #include <linux/nvram.h>
49 /* select machine configuration */
50 #if defined(CONFIG_ATARI)
52 #elif defined(__i386__) || defined(__x86_64__) || defined(__arm__) /* and others?? */
54 # if defined(CONFIG_COBALT)
55 # include <linux/cobalt-nvram.h>
61 # error Cannot build nvram driver for this machine configuration.
67 #define CHECK_DRIVER_INIT() 1
69 /* On PCs, the checksum is built only over bytes 2..31 */
70 #define PC_CKS_RANGE_START 2
71 #define PC_CKS_RANGE_END 31
73 #define NVRAM_BYTES (128-NVRAM_FIRST_BYTE)
75 #define mach_check_checksum pc_check_checksum
76 #define mach_set_checksum pc_set_checksum
77 #define mach_proc_infos pc_proc_infos
83 #define CHECK_DRIVER_INIT() 1
85 #define NVRAM_BYTES (128-NVRAM_FIRST_BYTE)
87 #define mach_check_checksum cobalt_check_checksum
88 #define mach_set_checksum cobalt_set_checksum
89 #define mach_proc_infos cobalt_proc_infos
95 /* Special parameters for RTC in Atari machines */
96 #include <asm/atarihw.h>
97 #include <asm/atariints.h>
98 #define RTC_PORT(x) (TT_RTC_BAS + 2*(x))
99 #define CHECK_DRIVER_INIT() (MACH_IS_ATARI && ATARIHW_PRESENT(TT_CLK))
101 #define NVRAM_BYTES 50
103 /* On Ataris, the checksum is over all bytes except the checksum bytes
104 * themselves; these are at the very end */
105 #define ATARI_CKS_RANGE_START 0
106 #define ATARI_CKS_RANGE_END 47
107 #define ATARI_CKS_LOC 48
109 #define mach_check_checksum atari_check_checksum
110 #define mach_set_checksum atari_set_checksum
111 #define mach_proc_infos atari_proc_infos
115 /* Note that *all* calls to CMOS_READ and CMOS_WRITE must be done with
116 * rtc_lock held. Due to the index-port/data-port design of the RTC, we
117 * don't want two different things trying to get to it at once. (e.g. the
118 * periodic 11 min sync from time.c vs. this driver.)
121 #include <linux/types.h>
122 #include <linux/errno.h>
123 #include <linux/miscdevice.h>
124 #include <linux/slab.h>
125 #include <linux/ioport.h>
126 #include <linux/fcntl.h>
127 #include <linux/mc146818rtc.h>
128 #include <linux/init.h>
129 #include <linux/proc_fs.h>
130 #include <linux/spinlock.h>
133 #include <asm/uaccess.h>
134 #include <asm/system.h>
136 static DEFINE_SPINLOCK(nvram_state_lock);
137 static int nvram_open_cnt; /* #times opened */
138 static int nvram_open_mode; /* special open modes */
139 #define NVRAM_WRITE 1 /* opened for writing (exclusive) */
140 #define NVRAM_EXCL 2 /* opened with O_EXCL */
142 static int mach_check_checksum(void);
143 static void mach_set_checksum(void);
145 #ifdef CONFIG_PROC_FS
146 static int mach_proc_infos(unsigned char *contents, char *buffer, int *len,
147 off_t *begin, off_t offset, int size);
151 * These functions are provided to be called internally or by other parts of
152 * the kernel. It's up to the caller to ensure correct checksum before reading
153 * or after writing (needs to be done only once).
155 * It is worth noting that these functions all access bytes of general
156 * purpose memory in the NVRAM - that is to say, they all add the
157 * NVRAM_FIRST_BYTE offset. Pass them offsets into NVRAM as if you did not
158 * know about the RTC cruft.
162 __nvram_read_byte(int i)
164 return CMOS_READ(NVRAM_FIRST_BYTE + i);
168 nvram_read_byte(int i)
173 spin_lock_irqsave(&rtc_lock, flags);
174 c = __nvram_read_byte(i);
175 spin_unlock_irqrestore(&rtc_lock, flags);
179 /* This races nicely with trying to read with checksum checking (nvram_read) */
181 __nvram_write_byte(unsigned char c, int i)
183 CMOS_WRITE(c, NVRAM_FIRST_BYTE + i);
187 nvram_write_byte(unsigned char c, int i)
191 spin_lock_irqsave(&rtc_lock, flags);
192 __nvram_write_byte(c, i);
193 spin_unlock_irqrestore(&rtc_lock, flags);
197 __nvram_check_checksum(void)
199 return mach_check_checksum();
203 nvram_check_checksum(void)
208 spin_lock_irqsave(&rtc_lock, flags);
209 rv = __nvram_check_checksum();
210 spin_unlock_irqrestore(&rtc_lock, flags);
215 __nvram_set_checksum(void)
222 nvram_set_checksum(void)
226 spin_lock_irqsave(&rtc_lock, flags);
227 __nvram_set_checksum();
228 spin_unlock_irqrestore(&rtc_lock, flags);
233 * The are the file operation function for user access to /dev/nvram
236 static loff_t nvram_llseek(struct file *file,loff_t offset, int origin )
244 offset += file->f_pos;
247 offset += NVRAM_BYTES;
251 return (offset >= 0) ? (file->f_pos = offset) : -EINVAL;
255 nvram_read(struct file *file, char __user *buf, size_t count, loff_t *ppos)
257 unsigned char contents[NVRAM_BYTES];
261 spin_lock_irq(&rtc_lock);
263 if (!__nvram_check_checksum())
266 for (tmp = contents; count-- > 0 && i < NVRAM_BYTES; ++i, ++tmp)
267 *tmp = __nvram_read_byte(i);
269 spin_unlock_irq(&rtc_lock);
271 if (copy_to_user(buf, contents, tmp - contents))
276 return tmp - contents;
279 spin_unlock_irq(&rtc_lock);
284 nvram_write(struct file *file, const char __user *buf, size_t count, loff_t *ppos)
286 unsigned char contents[NVRAM_BYTES];
291 len = (NVRAM_BYTES - i) < count ? (NVRAM_BYTES - i) : count;
292 if (copy_from_user(contents, buf, len))
295 spin_lock_irq(&rtc_lock);
297 if (!__nvram_check_checksum())
300 for (tmp = contents; count-- > 0 && i < NVRAM_BYTES; ++i, ++tmp)
301 __nvram_write_byte(*tmp, i);
303 __nvram_set_checksum();
305 spin_unlock_irq(&rtc_lock);
309 return tmp - contents;
312 spin_unlock_irq(&rtc_lock);
317 nvram_ioctl(struct inode *inode, struct file *file,
318 unsigned int cmd, unsigned long arg)
325 /* initialize NVRAM contents and checksum */
326 if (!capable(CAP_SYS_ADMIN))
329 spin_lock_irq(&rtc_lock);
331 for (i = 0; i < NVRAM_BYTES; ++i)
332 __nvram_write_byte(0, i);
333 __nvram_set_checksum();
335 spin_unlock_irq(&rtc_lock);
339 /* just set checksum, contents unchanged (maybe useful after
340 * checksum garbaged somehow...) */
341 if (!capable(CAP_SYS_ADMIN))
344 spin_lock_irq(&rtc_lock);
345 __nvram_set_checksum();
346 spin_unlock_irq(&rtc_lock);
355 nvram_open(struct inode *inode, struct file *file)
357 spin_lock(&nvram_state_lock);
359 if ((nvram_open_cnt && (file->f_flags & O_EXCL)) ||
360 (nvram_open_mode & NVRAM_EXCL) ||
361 ((file->f_mode & 2) && (nvram_open_mode & NVRAM_WRITE))) {
362 spin_unlock(&nvram_state_lock);
366 if (file->f_flags & O_EXCL)
367 nvram_open_mode |= NVRAM_EXCL;
368 if (file->f_mode & 2)
369 nvram_open_mode |= NVRAM_WRITE;
372 spin_unlock(&nvram_state_lock);
378 nvram_release(struct inode *inode, struct file *file)
380 spin_lock(&nvram_state_lock);
384 /* if only one instance is open, clear the EXCL bit */
385 if (nvram_open_mode & NVRAM_EXCL)
386 nvram_open_mode &= ~NVRAM_EXCL;
387 if (file->f_mode & 2)
388 nvram_open_mode &= ~NVRAM_WRITE;
390 spin_unlock(&nvram_state_lock);
395 #ifndef CONFIG_PROC_FS
397 nvram_read_proc(char *buffer, char **start, off_t offset,
398 int size, int *eof, void *data)
405 nvram_read_proc(char *buffer, char **start, off_t offset,
406 int size, int *eof, void *data)
408 unsigned char contents[NVRAM_BYTES];
412 spin_lock_irq(&rtc_lock);
413 for (i = 0; i < NVRAM_BYTES; ++i)
414 contents[i] = __nvram_read_byte(i);
415 spin_unlock_irq(&rtc_lock);
417 *eof = mach_proc_infos(contents, buffer, &len, &begin, offset, size);
419 if (offset >= begin + len)
421 *start = buffer + (offset - begin);
422 return (size < begin + len - offset) ? size : begin + len - offset;
426 /* This macro frees the machine specific function from bounds checking and
427 * this like that... */
428 #define PRINT_PROC(fmt,args...) \
430 *len += sprintf(buffer+*len, fmt, ##args); \
431 if (*begin + *len > offset + size) \
433 if (*begin + *len < offset) { \
439 #endif /* CONFIG_PROC_FS */
441 static struct file_operations nvram_fops = {
442 .owner = THIS_MODULE,
443 .llseek = nvram_llseek,
445 .write = nvram_write,
446 .ioctl = nvram_ioctl,
448 .release = nvram_release,
451 static struct miscdevice nvram_dev = {
462 /* First test whether the driver should init at all */
463 if (!CHECK_DRIVER_INIT())
466 ret = misc_register(&nvram_dev);
468 printk(KERN_ERR "nvram: can't misc_register on minor=%d\n",
472 if (!create_proc_read_entry("driver/nvram", 0, NULL, nvram_read_proc,
474 printk(KERN_ERR "nvram: can't create /proc/driver/nvram\n");
479 printk(KERN_INFO "Non-volatile memory driver v" NVRAM_VERSION "\n");
483 misc_deregister(&nvram_dev);
488 nvram_cleanup_module(void)
490 remove_proc_entry("driver/nvram", NULL);
491 misc_deregister(&nvram_dev);
494 module_init(nvram_init);
495 module_exit(nvram_cleanup_module);
498 * Machine specific functions
504 pc_check_checksum(void)
507 unsigned short sum = 0;
508 unsigned short expect;
510 for (i = PC_CKS_RANGE_START; i <= PC_CKS_RANGE_END; ++i)
511 sum += __nvram_read_byte(i);
512 expect = __nvram_read_byte(PC_CKS_LOC)<<8 |
513 __nvram_read_byte(PC_CKS_LOC+1);
514 return ((sum & 0xffff) == expect);
518 pc_set_checksum(void)
521 unsigned short sum = 0;
523 for (i = PC_CKS_RANGE_START; i <= PC_CKS_RANGE_END; ++i)
524 sum += __nvram_read_byte(i);
525 __nvram_write_byte(sum >> 8, PC_CKS_LOC);
526 __nvram_write_byte(sum & 0xff, PC_CKS_LOC + 1);
529 #ifdef CONFIG_PROC_FS
531 static char *floppy_types[] = {
532 "none", "5.25'' 360k", "5.25'' 1.2M", "3.5'' 720k", "3.5'' 1.44M",
533 "3.5'' 2.88M", "3.5'' 2.88M"
536 static char *gfx_types[] = {
537 "EGA, VGA, ... (with BIOS)",
544 pc_proc_infos(unsigned char *nvram, char *buffer, int *len,
545 off_t *begin, off_t offset, int size)
550 spin_lock_irq(&rtc_lock);
551 checksum = __nvram_check_checksum();
552 spin_unlock_irq(&rtc_lock);
554 PRINT_PROC("Checksum status: %svalid\n", checksum ? "" : "not ");
556 PRINT_PROC("# floppies : %d\n",
557 (nvram[6] & 1) ? (nvram[6] >> 6) + 1 : 0);
558 PRINT_PROC("Floppy 0 type : ");
559 type = nvram[2] >> 4;
560 if (type < sizeof (floppy_types) / sizeof (*floppy_types))
561 PRINT_PROC("%s\n", floppy_types[type]);
563 PRINT_PROC("%d (unknown)\n", type);
564 PRINT_PROC("Floppy 1 type : ");
565 type = nvram[2] & 0x0f;
566 if (type < sizeof (floppy_types) / sizeof (*floppy_types))
567 PRINT_PROC("%s\n", floppy_types[type]);
569 PRINT_PROC("%d (unknown)\n", type);
571 PRINT_PROC("HD 0 type : ");
572 type = nvram[4] >> 4;
574 PRINT_PROC("%02x\n", type == 0x0f ? nvram[11] : type);
576 PRINT_PROC("none\n");
578 PRINT_PROC("HD 1 type : ");
579 type = nvram[4] & 0x0f;
581 PRINT_PROC("%02x\n", type == 0x0f ? nvram[12] : type);
583 PRINT_PROC("none\n");
585 PRINT_PROC("HD type 48 data: %d/%d/%d C/H/S, precomp %d, lz %d\n",
586 nvram[18] | (nvram[19] << 8),
587 nvram[20], nvram[25],
588 nvram[21] | (nvram[22] << 8), nvram[23] | (nvram[24] << 8));
589 PRINT_PROC("HD type 49 data: %d/%d/%d C/H/S, precomp %d, lz %d\n",
590 nvram[39] | (nvram[40] << 8),
591 nvram[41], nvram[46],
592 nvram[42] | (nvram[43] << 8), nvram[44] | (nvram[45] << 8));
594 PRINT_PROC("DOS base memory: %d kB\n", nvram[7] | (nvram[8] << 8));
595 PRINT_PROC("Extended memory: %d kB (configured), %d kB (tested)\n",
596 nvram[9] | (nvram[10] << 8), nvram[34] | (nvram[35] << 8));
598 PRINT_PROC("Gfx adapter : %s\n", gfx_types[(nvram[6] >> 4) & 3]);
600 PRINT_PROC("FPU : %sinstalled\n",
601 (nvram[6] & 2) ? "" : "not ");
607 #endif /* MACH == PC */
611 /* the cobalt CMOS has a wider range of its checksum */
612 static int cobalt_check_checksum(void)
615 unsigned short sum = 0;
616 unsigned short expect;
618 for (i = COBT_CMOS_CKS_START; i <= COBT_CMOS_CKS_END; ++i) {
619 if ((i == COBT_CMOS_CHECKSUM) || (i == (COBT_CMOS_CHECKSUM+1)))
622 sum += __nvram_read_byte(i);
624 expect = __nvram_read_byte(COBT_CMOS_CHECKSUM) << 8 |
625 __nvram_read_byte(COBT_CMOS_CHECKSUM+1);
626 return ((sum & 0xffff) == expect);
629 static void cobalt_set_checksum(void)
632 unsigned short sum = 0;
634 for (i = COBT_CMOS_CKS_START; i <= COBT_CMOS_CKS_END; ++i) {
635 if ((i == COBT_CMOS_CHECKSUM) || (i == (COBT_CMOS_CHECKSUM+1)))
638 sum += __nvram_read_byte(i);
641 __nvram_write_byte(sum >> 8, COBT_CMOS_CHECKSUM);
642 __nvram_write_byte(sum & 0xff, COBT_CMOS_CHECKSUM+1);
645 #ifdef CONFIG_PROC_FS
647 static int cobalt_proc_infos(unsigned char *nvram, char *buffer, int *len,
648 off_t *begin, off_t offset, int size)
651 unsigned int checksum;
654 char *key = "cNoEbTaWlOtR!";
655 unsigned char bto_csum;
657 spin_lock_irq(&rtc_lock);
658 checksum = __nvram_check_checksum();
659 spin_unlock_irq(&rtc_lock);
661 PRINT_PROC("Checksum status: %svalid\n", checksum ? "" : "not ");
663 flags = nvram[COBT_CMOS_FLAG_BYTE_0] << 8
664 | nvram[COBT_CMOS_FLAG_BYTE_1];
666 PRINT_PROC("Console: %s\n",
667 flags & COBT_CMOS_CONSOLE_FLAG ? "on": "off");
669 PRINT_PROC("Firmware Debug Messages: %s\n",
670 flags & COBT_CMOS_DEBUG_FLAG ? "on": "off");
672 PRINT_PROC("Auto Prompt: %s\n",
673 flags & COBT_CMOS_AUTO_PROMPT_FLAG ? "on": "off");
675 PRINT_PROC("Shutdown Status: %s\n",
676 flags & COBT_CMOS_CLEAN_BOOT_FLAG ? "clean": "dirty");
678 PRINT_PROC("Hardware Probe: %s\n",
679 flags & COBT_CMOS_HW_NOPROBE_FLAG ? "partial": "full");
681 PRINT_PROC("System Fault: %sdetected\n",
682 flags & COBT_CMOS_SYSFAULT_FLAG ? "": "not ");
684 PRINT_PROC("Panic on OOPS: %s\n",
685 flags & COBT_CMOS_OOPSPANIC_FLAG ? "yes": "no");
687 PRINT_PROC("Delayed Cache Initialization: %s\n",
688 flags & COBT_CMOS_DELAY_CACHE_FLAG ? "yes": "no");
690 PRINT_PROC("Show Logo at Boot: %s\n",
691 flags & COBT_CMOS_NOLOGO_FLAG ? "no": "yes");
693 PRINT_PROC("Boot Method: ");
694 switch (nvram[COBT_CMOS_BOOT_METHOD]) {
695 case COBT_CMOS_BOOT_METHOD_DISK:
696 PRINT_PROC("disk\n");
699 case COBT_CMOS_BOOT_METHOD_ROM:
703 case COBT_CMOS_BOOT_METHOD_NET:
708 PRINT_PROC("unknown\n");
712 PRINT_PROC("Primary Boot Device: %d:%d\n",
713 nvram[COBT_CMOS_BOOT_DEV0_MAJ],
714 nvram[COBT_CMOS_BOOT_DEV0_MIN] );
715 PRINT_PROC("Secondary Boot Device: %d:%d\n",
716 nvram[COBT_CMOS_BOOT_DEV1_MAJ],
717 nvram[COBT_CMOS_BOOT_DEV1_MIN] );
718 PRINT_PROC("Tertiary Boot Device: %d:%d\n",
719 nvram[COBT_CMOS_BOOT_DEV2_MAJ],
720 nvram[COBT_CMOS_BOOT_DEV2_MIN] );
722 PRINT_PROC("Uptime: %d\n",
723 nvram[COBT_CMOS_UPTIME_0] << 24 |
724 nvram[COBT_CMOS_UPTIME_1] << 16 |
725 nvram[COBT_CMOS_UPTIME_2] << 8 |
726 nvram[COBT_CMOS_UPTIME_3]);
728 PRINT_PROC("Boot Count: %d\n",
729 nvram[COBT_CMOS_BOOTCOUNT_0] << 24 |
730 nvram[COBT_CMOS_BOOTCOUNT_1] << 16 |
731 nvram[COBT_CMOS_BOOTCOUNT_2] << 8 |
732 nvram[COBT_CMOS_BOOTCOUNT_3]);
734 /* 13 bytes of serial num */
735 for (i=0 ; i<13 ; i++) {
736 sernum[i] = nvram[COBT_CMOS_SYS_SERNUM_0 + i];
741 for (i=0 ; i<13 ; i++) {
742 checksum += sernum[i] ^ key[i];
744 checksum = ((checksum & 0x7f) ^ (0xd6)) & 0xff;
746 PRINT_PROC("Serial Number: %s", sernum);
747 if (checksum != nvram[COBT_CMOS_SYS_SERNUM_CSUM]) {
748 PRINT_PROC(" (invalid checksum)");
752 PRINT_PROC("Rom Revison: %d.%d.%d\n", nvram[COBT_CMOS_ROM_REV_MAJ],
753 nvram[COBT_CMOS_ROM_REV_MIN], nvram[COBT_CMOS_ROM_REV_REV]);
755 PRINT_PROC("BTO Server: %d.%d.%d.%d", nvram[COBT_CMOS_BTO_IP_0],
756 nvram[COBT_CMOS_BTO_IP_1], nvram[COBT_CMOS_BTO_IP_2],
757 nvram[COBT_CMOS_BTO_IP_3]);
758 bto_csum = nvram[COBT_CMOS_BTO_IP_0] + nvram[COBT_CMOS_BTO_IP_1]
759 + nvram[COBT_CMOS_BTO_IP_2] + nvram[COBT_CMOS_BTO_IP_3];
760 if (bto_csum != nvram[COBT_CMOS_BTO_IP_CSUM]) {
761 PRINT_PROC(" (invalid checksum)");
765 if (flags & COBT_CMOS_VERSION_FLAG
766 && nvram[COBT_CMOS_VERSION] >= COBT_CMOS_VER_BTOCODE) {
767 PRINT_PROC("BTO Code: 0x%x\n",
768 nvram[COBT_CMOS_BTO_CODE_0] << 24 |
769 nvram[COBT_CMOS_BTO_CODE_1] << 16 |
770 nvram[COBT_CMOS_BTO_CODE_2] << 8 |
771 nvram[COBT_CMOS_BTO_CODE_3]);
776 #endif /* CONFIG_PROC_FS */
778 #endif /* MACH == COBALT */
783 atari_check_checksum(void)
786 unsigned char sum = 0;
788 for (i = ATARI_CKS_RANGE_START; i <= ATARI_CKS_RANGE_END; ++i)
789 sum += __nvram_read_byte(i);
790 return (__nvram_read_byte(ATARI_CKS_LOC) == (~sum & 0xff) &&
791 __nvram_read_byte(ATARI_CKS_LOC + 1) == (sum & 0xff));
795 atari_set_checksum(void)
798 unsigned char sum = 0;
800 for (i = ATARI_CKS_RANGE_START; i <= ATARI_CKS_RANGE_END; ++i)
801 sum += __nvram_read_byte(i);
802 __nvram_write_byte(~sum, ATARI_CKS_LOC);
803 __nvram_write_byte(sum, ATARI_CKS_LOC + 1);
806 #ifdef CONFIG_PROC_FS
814 { 0x20, "NetBSD (?)" },
816 { 0x00, "unspecified" }
819 static char *languages[] = {
831 static char *dateformat[] = {
842 static char *colors[] = {
843 "2", "4", "16", "256", "65536", "??", "??", "??"
846 #define fieldsize(a) (sizeof(a)/sizeof(*a))
849 atari_proc_infos(unsigned char *nvram, char *buffer, int *len,
850 off_t *begin, off_t offset, int size)
852 int checksum = nvram_check_checksum();
856 PRINT_PROC("Checksum status : %svalid\n", checksum ? "" : "not ");
858 PRINT_PROC("Boot preference : ");
859 for (i = fieldsize(boot_prefs) - 1; i >= 0; --i) {
860 if (nvram[1] == boot_prefs[i].val) {
861 PRINT_PROC("%s\n", boot_prefs[i].name);
866 PRINT_PROC("0x%02x (undefined)\n", nvram[1]);
868 PRINT_PROC("SCSI arbitration : %s\n",
869 (nvram[16] & 0x80) ? "on" : "off");
870 PRINT_PROC("SCSI host ID : ");
871 if (nvram[16] & 0x80)
872 PRINT_PROC("%d\n", nvram[16] & 7);
876 /* the following entries are defined only for the Falcon */
877 if ((atari_mch_cookie >> 16) != ATARI_MCH_FALCON)
880 PRINT_PROC("OS language : ");
881 if (nvram[6] < fieldsize(languages))
882 PRINT_PROC("%s\n", languages[nvram[6]]);
884 PRINT_PROC("%u (undefined)\n", nvram[6]);
885 PRINT_PROC("Keyboard language: ");
886 if (nvram[7] < fieldsize(languages))
887 PRINT_PROC("%s\n", languages[nvram[7]]);
889 PRINT_PROC("%u (undefined)\n", nvram[7]);
890 PRINT_PROC("Date format : ");
891 PRINT_PROC(dateformat[nvram[8] & 7],
892 nvram[9] ? nvram[9] : '/', nvram[9] ? nvram[9] : '/');
893 PRINT_PROC(", %dh clock\n", nvram[8] & 16 ? 24 : 12);
894 PRINT_PROC("Boot delay : ");
896 PRINT_PROC("default");
898 PRINT_PROC("%ds%s\n", nvram[10],
899 nvram[10] < 8 ? ", no memory test" : "");
901 vmode = (nvram[14] << 8) || nvram[15];
902 PRINT_PROC("Video mode : %s colors, %d columns, %s %s monitor\n",
905 vmode & 16 ? "VGA" : "TV", vmode & 32 ? "PAL" : "NTSC");
906 PRINT_PROC(" %soverscan, compat. mode %s%s\n",
907 vmode & 64 ? "" : "no ",
908 vmode & 128 ? "on" : "off",
910 (vmode & 16 ? ", line doubling" : ", half screen") : "");
916 #endif /* MACH == ATARI */
918 MODULE_LICENSE("GPL");
920 EXPORT_SYMBOL(__nvram_read_byte);
921 EXPORT_SYMBOL(nvram_read_byte);
922 EXPORT_SYMBOL(__nvram_write_byte);
923 EXPORT_SYMBOL(nvram_write_byte);
924 EXPORT_SYMBOL(__nvram_check_checksum);
925 EXPORT_SYMBOL(nvram_check_checksum);
926 MODULE_ALIAS_MISCDEV(NVRAM_MINOR);