Commit | Line | Data |
---|---|---|
1da177e4 | 1 | /* |
c55377ee | 2 | * NVRAM definitions and access functions. |
1da177e4 LT |
3 | * |
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 | ||
c55377ee PM |
10 | #ifndef _ASM_POWERPC_NVRAM_H |
11 | #define _ASM_POWERPC_NVRAM_H | |
1da177e4 | 12 | |
4751505c IK |
13 | #include <linux/errno.h> |
14 | ||
1da177e4 LT |
15 | #define NVRW_CNT 0x20 |
16 | #define NVRAM_HEADER_LEN 16 /* sizeof(struct nvram_header) */ | |
17 | #define NVRAM_BLOCK_LEN 16 | |
18 | #define NVRAM_MAX_REQ (2080/NVRAM_BLOCK_LEN) | |
19 | #define NVRAM_MIN_REQ (1056/NVRAM_BLOCK_LEN) | |
20 | ||
21 | #define NVRAM_AS0 0x74 | |
22 | #define NVRAM_AS1 0x75 | |
23 | #define NVRAM_DATA 0x77 | |
24 | ||
25 | ||
26 | /* RTC Offsets */ | |
27 | ||
28 | #define MOTO_RTC_SECONDS 0x1FF9 | |
29 | #define MOTO_RTC_MINUTES 0x1FFA | |
30 | #define MOTO_RTC_HOURS 0x1FFB | |
31 | #define MOTO_RTC_DAY_OF_WEEK 0x1FFC | |
32 | #define MOTO_RTC_DAY_OF_MONTH 0x1FFD | |
33 | #define MOTO_RTC_MONTH 0x1FFE | |
34 | #define MOTO_RTC_YEAR 0x1FFF | |
35 | #define MOTO_RTC_CONTROLA 0x1FF8 | |
36 | #define MOTO_RTC_CONTROLB 0x1FF9 | |
37 | ||
38 | #define NVRAM_SIG_SP 0x02 /* support processor */ | |
39 | #define NVRAM_SIG_OF 0x50 /* open firmware config */ | |
40 | #define NVRAM_SIG_FW 0x51 /* general firmware */ | |
41 | #define NVRAM_SIG_HW 0x52 /* hardware (VPD) */ | |
42 | #define NVRAM_SIG_FLIP 0x5a /* Apple flip/flop header */ | |
43 | #define NVRAM_SIG_APPL 0x5f /* Apple "system" (???) */ | |
44 | #define NVRAM_SIG_SYS 0x70 /* system env vars */ | |
45 | #define NVRAM_SIG_CFG 0x71 /* config data */ | |
46 | #define NVRAM_SIG_ELOG 0x72 /* error log */ | |
47 | #define NVRAM_SIG_VEND 0x7e /* vendor defined */ | |
48 | #define NVRAM_SIG_FREE 0x7f /* Free space */ | |
49 | #define NVRAM_SIG_OS 0xa0 /* OS defined */ | |
50 | #define NVRAM_SIG_PANIC 0xa1 /* Apple OSX "panic" */ | |
51 | ||
52 | /* If change this size, then change the size of NVNAME_LEN */ | |
53 | struct nvram_header { | |
54 | unsigned char signature; | |
55 | unsigned char checksum; | |
56 | unsigned short length; | |
57 | char name[12]; | |
58 | }; | |
59 | ||
88ced031 | 60 | #ifdef __KERNEL__ |
1da177e4 LT |
61 | struct nvram_partition { |
62 | struct list_head partition; | |
63 | struct nvram_header header; | |
64 | unsigned int index; | |
65 | }; | |
66 | ||
67 | ||
0f2342c8 LV |
68 | extern int nvram_write_error_log(char * buff, int length, |
69 | unsigned int err_type, unsigned int err_seq); | |
70 | extern int nvram_read_error_log(char * buff, int length, | |
71 | unsigned int * err_type, unsigned int *err_seq); | |
1da177e4 LT |
72 | extern int nvram_clear_error_log(void); |
73 | extern struct nvram_partition *nvram_find_partition(int sig, const char *name); | |
74 | ||
75 | extern int pSeries_nvram_init(void); | |
4751505c IK |
76 | |
77 | #ifdef CONFIG_MMIO_NVRAM | |
f3f66f59 | 78 | extern int mmio_nvram_init(void); |
4751505c IK |
79 | #else |
80 | static inline int mmio_nvram_init(void) | |
81 | { | |
82 | return -ENODEV; | |
83 | } | |
84 | #endif | |
85 | ||
88ced031 | 86 | #endif /* __KERNEL__ */ |
1da177e4 LT |
87 | |
88 | /* PowerMac specific nvram stuffs */ | |
89 | ||
90 | enum { | |
91 | pmac_nvram_OF, /* Open Firmware partition */ | |
92 | pmac_nvram_XPRAM, /* MacOS XPRAM partition */ | |
93 | pmac_nvram_NR /* MacOS Name Registry partition */ | |
94 | }; | |
95 | ||
88ced031 | 96 | #ifdef __KERNEL__ |
1da177e4 LT |
97 | /* Return partition offset in nvram */ |
98 | extern int pmac_get_partition(int partition); | |
99 | ||
100 | /* Direct access to XPRAM on PowerMacs */ | |
101 | extern u8 pmac_xpram_read(int xpaddr); | |
102 | extern void pmac_xpram_write(int xpaddr, u8 data); | |
103 | ||
104 | /* Synchronize NVRAM */ | |
c55377ee PM |
105 | extern void nvram_sync(void); |
106 | ||
107 | /* Normal access to NVRAM */ | |
108 | extern unsigned char nvram_read_byte(int i); | |
109 | extern void nvram_write_byte(unsigned char c, int i); | |
88ced031 | 110 | #endif |
1da177e4 LT |
111 | |
112 | /* Some offsets in XPRAM */ | |
113 | #define PMAC_XPRAM_MACHINE_LOC 0xe4 | |
114 | #define PMAC_XPRAM_SOUND_VOLUME 0x08 | |
115 | ||
116 | /* Machine location structure in PowerMac XPRAM */ | |
117 | struct pmac_machine_location { | |
118 | unsigned int latitude; /* 2+30 bit Fractional number */ | |
119 | unsigned int longitude; /* 2+30 bit Fractional number */ | |
120 | unsigned int delta; /* mix of GMT delta and DLS */ | |
121 | }; | |
122 | ||
123 | /* | |
124 | * /dev/nvram ioctls | |
125 | * | |
126 | * Note that PMAC_NVRAM_GET_OFFSET is still supported, but is | |
127 | * definitely obsolete. Do not use it if you can avoid it | |
128 | */ | |
129 | ||
130 | #define OBSOLETE_PMAC_NVRAM_GET_OFFSET \ | |
131 | _IOWR('p', 0x40, int) | |
132 | ||
133 | #define IOC_NVRAM_GET_OFFSET _IOWR('p', 0x42, int) /* Get NVRAM partition offset */ | |
c55377ee | 134 | #define IOC_NVRAM_SYNC _IO('p', 0x43) /* Sync NVRAM image */ |
1da177e4 | 135 | |
c55377ee | 136 | #endif /* _ASM_POWERPC_NVRAM_H */ |