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 */ 53struct 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 64struct nvram_partition { 65 struct list_head partition; 66 struct nvram_header header; 67 unsigned int index; 68}; 69 70 71extern int nvram_write_error_log(char * buff, int length, 72 unsigned int err_type, unsigned int err_seq); 73extern int nvram_read_error_log(char * buff, int length, 74 unsigned int * err_type, unsigned int *err_seq); 75extern int nvram_clear_error_log(void); 76 77extern int pSeries_nvram_init(void); 78 79#ifdef CONFIG_MMIO_NVRAM 80extern int mmio_nvram_init(void); 81#else 82static inline int mmio_nvram_init(void) 83{ 84 return -ENODEV; 85} 86#endif 87 88#endif /* __KERNEL__ */ 89 90/* PowerMac specific nvram stuffs */ 91 92enum { 93 pmac_nvram_OF, /* Open Firmware partition */ 94 pmac_nvram_XPRAM, /* MacOS XPRAM partition */ 95 pmac_nvram_NR /* MacOS Name Registry partition */ 96}; 97 98#ifdef __KERNEL__ 99/* Return partition offset in nvram */ 100extern int pmac_get_partition(int partition); 101 102/* Direct access to XPRAM on PowerMacs */ 103extern u8 pmac_xpram_read(int xpaddr); 104extern void pmac_xpram_write(int xpaddr, u8 data); 105 106/* Synchronize NVRAM */ 107extern void nvram_sync(void); 108 109/* Determine NVRAM size */ 110extern ssize_t nvram_get_size(void); 111 112/* Normal access to NVRAM */ 113extern unsigned char nvram_read_byte(int i); 114extern void nvram_write_byte(unsigned char c, int i); 115#endif 116 117/* Some offsets in XPRAM */ 118#define PMAC_XPRAM_MACHINE_LOC 0xe4 119#define PMAC_XPRAM_SOUND_VOLUME 0x08 120 121/* Machine location structure in PowerMac XPRAM */ 122struct pmac_machine_location { 123 unsigned int latitude; /* 2+30 bit Fractional number */ 124 unsigned int longitude; /* 2+30 bit Fractional number */ 125 unsigned int delta; /* mix of GMT delta and DLS */ 126}; 127 128/* 129 * /dev/nvram ioctls 130 * 131 * Note that PMAC_NVRAM_GET_OFFSET is still supported, but is 132 * definitely obsolete. Do not use it if you can avoid it 133 */ 134 135#define OBSOLETE_PMAC_NVRAM_GET_OFFSET \ 136 _IOWR('p', 0x40, int) 137 138#define IOC_NVRAM_GET_OFFSET _IOWR('p', 0x42, int) /* Get NVRAM partition offset */ 139#define IOC_NVRAM_SYNC _IO('p', 0x43) /* Sync NVRAM image */ 140 141#endif /* _ASM_POWERPC_NVRAM_H */ 142