LXR linux/arch/powerpc/include/asm/nvram.h

   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);
  76extern struct nvram_partition *nvram_find_partition(int sig, const char *name);
  77
  78extern int pSeries_nvram_init(void);
  79
  80#ifdef CONFIG_MMIO_NVRAM
  81extern int mmio_nvram_init(void);
  82#else
  83static inline int mmio_nvram_init(void)
  84{
  85        return -ENODEV;
  86}
  87#endif
  88
  89#endif /* __KERNEL__ */
  90
  91/* PowerMac specific nvram stuffs */
  92
  93enum {
  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 */
 101extern int      pmac_get_partition(int partition);
 102
 103/* Direct access to XPRAM on PowerMacs */
 104extern u8       pmac_xpram_read(int xpaddr);
 105extern void     pmac_xpram_write(int xpaddr, u8 data);
 106
 107/* Synchronize NVRAM */
 108extern void     nvram_sync(void);
 109
 110/* Normal access to NVRAM */
 111extern unsigned char nvram_read_byte(int i);
 112extern void nvram_write_byte(unsigned char c, int i);
 113#endif
 114
 115/* Some offsets in XPRAM */
 116#define PMAC_XPRAM_MACHINE_LOC  0xe4
 117#define PMAC_XPRAM_SOUND_VOLUME 0x08
 118
 119/* Machine location structure in PowerMac XPRAM */
 120struct pmac_machine_location {
 121        unsigned int    latitude;       /* 2+30 bit Fractional number */
 122        unsigned int    longitude;      /* 2+30 bit Fractional number */
 123        unsigned int    delta;          /* mix of GMT delta and DLS */
 124};
 125
 126/*
 127 * /dev/nvram ioctls
 128 *
 129 * Note that PMAC_NVRAM_GET_OFFSET is still supported, but is
 130 * definitely obsolete. Do not use it if you can avoid it
 131 */
 132
 133#define OBSOLETE_PMAC_NVRAM_GET_OFFSET \
 134                                _IOWR('p', 0x40, int)
 135
 136#define IOC_NVRAM_GET_OFFSET    _IOWR('p', 0x42, int)   /* Get NVRAM partition offset */
 137#define IOC_NVRAM_SYNC          _IO('p', 0x43)          /* Sync NVRAM image */
 138
 139#endif /* _ASM_POWERPC_NVRAM_H */
 140