1 /* 2 * NVRAM definitions and access functions. 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 10 #ifndef _ASM_POWERPC_NVRAM_H 11 #define _ASM_POWERPC_NVRAM_H 12 13 #include <linux/errno.h> 14 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 60 #ifdef __KERNEL__ 61 62 #include <linux/list.h> 63 64 struct nvram_partition { 65 struct list_head partition; 66 struct nvram_header header; 67 unsigned int index; 68 }; 69 70 71 extern int nvram_write_error_log(char * buff, int length, 72 unsigned int err_type, unsigned int err_seq); 73 extern int nvram_read_error_log(char * buff, int length, 74 unsigned int * err_type, unsigned int *err_seq); 75 extern int nvram_clear_error_log(void); 76 extern struct nvram_partition *nvram_find_partition(int sig, const char *name); 77 78 extern int pSeries_nvram_init(void); 79 80 #ifdef CONFIG_MMIO_NVRAM 81 extern int mmio_nvram_init(void); 82 #else 83 static inline int mmio_nvram_init(void) 84 { 85 return -ENODEV; 86 } 87 #endif 88 89 #endif /* __KERNEL__ */ 90 91 /* PowerMac specific nvram stuffs */ 92 93 enum { 94 pmac_nvram_OF, /* Open Firmware partition */ 95 pmac_nvram_XPRAM, /* MacOS XPRAM partition */ 96 pmac_nvram_NR /* MacOS Name Registry partition */ 97 }; 98 99 #ifdef __KERNEL__ 100 /* Return partition offset in nvram */ 101 extern int pmac_get_partition(int partition); 102 103 /* Direct access to XPRAM on PowerMacs */ 104 extern u8 pmac_xpram_read(int xpaddr); 105 extern void pmac_xpram_write(int xpaddr, u8 data); 106 107 /* Synchronize NVRAM */ 108 extern void nvram_sync(void); 109 110 /* Determine NVRAM size */ 111 extern ssize_t nvram_get_size(void); 112 113 /* Normal access to NVRAM */ 114 extern unsigned char nvram_read_byte(int i); 115 extern void nvram_write_byte(unsigned char c, int i); 116 #endif 117 118 /* Some offsets in XPRAM */ 119 #define PMAC_XPRAM_MACHINE_LOC 0xe4 120 #define PMAC_XPRAM_SOUND_VOLUME 0x08 121 122 /* Machine location structure in PowerMac XPRAM */ 123 struct pmac_machine_location { 124 unsigned int latitude; /* 2+30 bit Fractional number */ 125 unsigned int longitude; /* 2+30 bit Fractional number */ 126 unsigned int delta; /* mix of GMT delta and DLS */ 127 }; 128 129 /* 130 * /dev/nvram ioctls 131 * 132 * Note that PMAC_NVRAM_GET_OFFSET is still supported, but is 133 * definitely obsolete. Do not use it if you can avoid it 134 */ 135 136 #define OBSOLETE_PMAC_NVRAM_GET_OFFSET \ 137 _IOWR('p', 0x40, int) 138 139 #define IOC_NVRAM_GET_OFFSET _IOWR('p', 0x42, int) /* Get NVRAM partition offset */ 140 #define IOC_NVRAM_SYNC _IO('p', 0x43) /* Sync NVRAM image */ 141 142 #endif /* _ASM_POWERPC_NVRAM_H */ 143