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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
Paul Mackerrasc55377e2005-11-14 17:22:01 +11002 * NVRAM definitions and access functions.
Linus Torvalds1da177e2005-04-16 15:20:36 -07003 *
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public License
6 * as published by the Free Software Foundation; either version
7 * 2 of the License, or (at your option) any later version.
8 */
9
Paul Mackerrasc55377e2005-11-14 17:22:01 +110010#ifndef _ASM_POWERPC_NVRAM_H
11#define _ASM_POWERPC_NVRAM_H
Linus Torvalds1da177e2005-04-16 15:20:36 -070012
13#define NVRW_CNT 0x20
14#define NVRAM_HEADER_LEN 16 /* sizeof(struct nvram_header) */
15#define NVRAM_BLOCK_LEN 16
16#define NVRAM_MAX_REQ (2080/NVRAM_BLOCK_LEN)
17#define NVRAM_MIN_REQ (1056/NVRAM_BLOCK_LEN)
18
19#define NVRAM_AS0 0x74
20#define NVRAM_AS1 0x75
21#define NVRAM_DATA 0x77
22
23
24/* RTC Offsets */
25
26#define MOTO_RTC_SECONDS 0x1FF9
27#define MOTO_RTC_MINUTES 0x1FFA
28#define MOTO_RTC_HOURS 0x1FFB
29#define MOTO_RTC_DAY_OF_WEEK 0x1FFC
30#define MOTO_RTC_DAY_OF_MONTH 0x1FFD
31#define MOTO_RTC_MONTH 0x1FFE
32#define MOTO_RTC_YEAR 0x1FFF
33#define MOTO_RTC_CONTROLA 0x1FF8
34#define MOTO_RTC_CONTROLB 0x1FF9
35
36#define NVRAM_SIG_SP 0x02 /* support processor */
37#define NVRAM_SIG_OF 0x50 /* open firmware config */
38#define NVRAM_SIG_FW 0x51 /* general firmware */
39#define NVRAM_SIG_HW 0x52 /* hardware (VPD) */
40#define NVRAM_SIG_FLIP 0x5a /* Apple flip/flop header */
41#define NVRAM_SIG_APPL 0x5f /* Apple "system" (???) */
42#define NVRAM_SIG_SYS 0x70 /* system env vars */
43#define NVRAM_SIG_CFG 0x71 /* config data */
44#define NVRAM_SIG_ELOG 0x72 /* error log */
45#define NVRAM_SIG_VEND 0x7e /* vendor defined */
46#define NVRAM_SIG_FREE 0x7f /* Free space */
47#define NVRAM_SIG_OS 0xa0 /* OS defined */
48#define NVRAM_SIG_PANIC 0xa1 /* Apple OSX "panic" */
49
50/* If change this size, then change the size of NVNAME_LEN */
51struct nvram_header {
52 unsigned char signature;
53 unsigned char checksum;
54 unsigned short length;
55 char name[12];
56};
57
Arnd Bergmann88ced032005-12-16 22:43:46 +010058#ifdef __KERNEL__
Linus Torvalds1da177e2005-04-16 15:20:36 -070059struct nvram_partition {
60 struct list_head partition;
61 struct nvram_header header;
62 unsigned int index;
63};
64
65
Linas Vepstas0f2342c2007-08-10 06:56:41 +100066extern int nvram_write_error_log(char * buff, int length,
67 unsigned int err_type, unsigned int err_seq);
68extern int nvram_read_error_log(char * buff, int length,
69 unsigned int * err_type, unsigned int *err_seq);
Linus Torvalds1da177e2005-04-16 15:20:36 -070070extern int nvram_clear_error_log(void);
71extern struct nvram_partition *nvram_find_partition(int sig, const char *name);
72
73extern int pSeries_nvram_init(void);
Arnd Bergmannf3f66f52005-10-31 20:08:37 -050074extern int mmio_nvram_init(void);
Arnd Bergmann88ced032005-12-16 22:43:46 +010075#endif /* __KERNEL__ */
Linus Torvalds1da177e2005-04-16 15:20:36 -070076
77/* PowerMac specific nvram stuffs */
78
79enum {
80 pmac_nvram_OF, /* Open Firmware partition */
81 pmac_nvram_XPRAM, /* MacOS XPRAM partition */
82 pmac_nvram_NR /* MacOS Name Registry partition */
83};
84
Arnd Bergmann88ced032005-12-16 22:43:46 +010085#ifdef __KERNEL__
Linus Torvalds1da177e2005-04-16 15:20:36 -070086/* Return partition offset in nvram */
87extern int pmac_get_partition(int partition);
88
89/* Direct access to XPRAM on PowerMacs */
90extern u8 pmac_xpram_read(int xpaddr);
91extern void pmac_xpram_write(int xpaddr, u8 data);
92
93/* Synchronize NVRAM */
Paul Mackerrasc55377e2005-11-14 17:22:01 +110094extern void nvram_sync(void);
95
96/* Normal access to NVRAM */
97extern unsigned char nvram_read_byte(int i);
98extern void nvram_write_byte(unsigned char c, int i);
Arnd Bergmann88ced032005-12-16 22:43:46 +010099#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700100
101/* Some offsets in XPRAM */
102#define PMAC_XPRAM_MACHINE_LOC 0xe4
103#define PMAC_XPRAM_SOUND_VOLUME 0x08
104
105/* Machine location structure in PowerMac XPRAM */
106struct pmac_machine_location {
107 unsigned int latitude; /* 2+30 bit Fractional number */
108 unsigned int longitude; /* 2+30 bit Fractional number */
109 unsigned int delta; /* mix of GMT delta and DLS */
110};
111
112/*
113 * /dev/nvram ioctls
114 *
115 * Note that PMAC_NVRAM_GET_OFFSET is still supported, but is
116 * definitely obsolete. Do not use it if you can avoid it
117 */
118
119#define OBSOLETE_PMAC_NVRAM_GET_OFFSET \
120 _IOWR('p', 0x40, int)
121
122#define IOC_NVRAM_GET_OFFSET _IOWR('p', 0x42, int) /* Get NVRAM partition offset */
Paul Mackerrasc55377e2005-11-14 17:22:01 +1100123#define IOC_NVRAM_SYNC _IO('p', 0x43) /* Sync NVRAM image */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700124
Paul Mackerrasc55377e2005-11-14 17:22:01 +1100125#endif /* _ASM_POWERPC_NVRAM_H */