[deliverable/linux.git] / include / asm-powerpc / nvram.h

/*
 * NVRAM definitions and access functions.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version
 * 2 of the License, or (at your option) any later version.
 */

#ifndef _ASM_POWERPC_NVRAM_H
#define _ASM_POWERPC_NVRAM_H

#define NVRW_CNT 0x20
#define NVRAM_HEADER_LEN 16 /* sizeof(struct nvram_header) */
#define NVRAM_BLOCK_LEN 16
#define NVRAM_MAX_REQ (2080/NVRAM_BLOCK_LEN)
#define NVRAM_MIN_REQ (1056/NVRAM_BLOCK_LEN)

#define NVRAM_AS0  0x74
#define NVRAM_AS1  0x75
#define NVRAM_DATA 0x77


/* RTC Offsets */

#define MOTO_RTC_SECONDS	0x1FF9
#define MOTO_RTC_MINUTES	0x1FFA
#define MOTO_RTC_HOURS		0x1FFB
#define MOTO_RTC_DAY_OF_WEEK	0x1FFC
#define MOTO_RTC_DAY_OF_MONTH	0x1FFD
#define MOTO_RTC_MONTH		0x1FFE
#define MOTO_RTC_YEAR		0x1FFF
#define MOTO_RTC_CONTROLA       0x1FF8
#define MOTO_RTC_CONTROLB       0x1FF9

#define NVRAM_SIG_SP	0x02	/* support processor */
#define NVRAM_SIG_OF	0x50	/* open firmware config */
#define NVRAM_SIG_FW	0x51	/* general firmware */
#define NVRAM_SIG_HW	0x52	/* hardware (VPD) */
#define NVRAM_SIG_FLIP	0x5a	/* Apple flip/flop header */
#define NVRAM_SIG_APPL	0x5f	/* Apple "system" (???) */
#define NVRAM_SIG_SYS	0x70	/* system env vars */
#define NVRAM_SIG_CFG	0x71	/* config data */
#define NVRAM_SIG_ELOG	0x72	/* error log */
#define NVRAM_SIG_VEND	0x7e	/* vendor defined */
#define NVRAM_SIG_FREE	0x7f	/* Free space */
#define NVRAM_SIG_OS	0xa0	/* OS defined */
#define NVRAM_SIG_PANIC	0xa1	/* Apple OSX "panic" */

/* If change this size, then change the size of NVNAME_LEN */
struct nvram_header {
	unsigned char signature;
	unsigned char checksum;
	unsigned short length;
	char name[12];
};

#ifdef __KERNEL__
struct nvram_partition {
	struct list_head partition;
	struct nvram_header header;
	unsigned int index;
};


extern int nvram_write_error_log(char * buff, int length, unsigned int err_type);
extern int nvram_read_error_log(char * buff, int length, unsigned int * err_type);
extern int nvram_clear_error_log(void);
extern struct nvram_partition *nvram_find_partition(int sig, const char *name);

extern int pSeries_nvram_init(void);
extern int mmio_nvram_init(void);
#endif /* __KERNEL__ */

/* PowerMac specific nvram stuffs */

enum {
	pmac_nvram_OF,		/* Open Firmware partition */
	pmac_nvram_XPRAM,	/* MacOS XPRAM partition */
	pmac_nvram_NR		/* MacOS Name Registry partition */
};

#ifdef __KERNEL__
/* Return partition offset in nvram */
extern int	pmac_get_partition(int partition);

/* Direct access to XPRAM on PowerMacs */
extern u8	pmac_xpram_read(int xpaddr);
extern void	pmac_xpram_write(int xpaddr, u8 data);

/* Synchronize NVRAM */
extern void	nvram_sync(void);

/* Normal access to NVRAM */
extern unsigned char nvram_read_byte(int i);
extern void nvram_write_byte(unsigned char c, int i);
#endif

/* Some offsets in XPRAM */
#define PMAC_XPRAM_MACHINE_LOC	0xe4
#define PMAC_XPRAM_SOUND_VOLUME	0x08

/* Machine location structure in PowerMac XPRAM */
struct pmac_machine_location {
	unsigned int	latitude;	/* 2+30 bit Fractional number */
	unsigned int	longitude;	/* 2+30 bit Fractional number */
	unsigned int	delta;		/* mix of GMT delta and DLS */
};

/*
 * /dev/nvram ioctls
 *
 * Note that PMAC_NVRAM_GET_OFFSET is still supported, but is
 * definitely obsolete. Do not use it if you can avoid it
 */

#define OBSOLETE_PMAC_NVRAM_GET_OFFSET \
				_IOWR('p', 0x40, int)

#define IOC_NVRAM_GET_OFFSET	_IOWR('p', 0x42, int)	/* Get NVRAM partition offset */
#define IOC_NVRAM_SYNC		_IO('p', 0x43)		/* Sync NVRAM image */

#endif /* _ASM_POWERPC_NVRAM_H */
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
c55377ee PM	11	#define _ASM_POWERPC_NVRAM_H
1da177e4 LT	12
	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 */
	51	struct nvram_header {
	52	unsigned char signature;
	53	unsigned char checksum;
	54	unsigned short length;
	55	char name[12];
	56	};
	57
88ced031	58	#ifdef __KERNEL__
1da177e4 LT	59	struct nvram_partition {
	60	struct list_head partition;
	61	struct nvram_header header;
	62	unsigned int index;
	63	};
	64
	65
	66	extern int nvram_write_error_log(char * buff, int length, unsigned int err_type);
	67	extern int nvram_read_error_log(char * buff, int length, unsigned int * err_type);
	68	extern int nvram_clear_error_log(void);
	69	extern struct nvram_partition nvram_find_partition(int sig, const char name);
	70
	71	extern int pSeries_nvram_init(void);
f3f66f59	72	extern int mmio_nvram_init(void);
88ced031	73	#endif /* __KERNEL__ */
1da177e4 LT	74
	75	/* PowerMac specific nvram stuffs */
	76
	77	enum {
	78	pmac_nvram_OF, /* Open Firmware partition */
	79	pmac_nvram_XPRAM, /* MacOS XPRAM partition */
	80	pmac_nvram_NR /* MacOS Name Registry partition */
	81	};
	82
88ced031	83	#ifdef __KERNEL__
1da177e4 LT	84	/* Return partition offset in nvram */
	85	extern int pmac_get_partition(int partition);
	86
	87	/* Direct access to XPRAM on PowerMacs */
	88	extern u8 pmac_xpram_read(int xpaddr);
	89	extern void pmac_xpram_write(int xpaddr, u8 data);
	90
	91	/* Synchronize NVRAM */
c55377ee PM	92	extern void nvram_sync(void);
	93
	94	/* Normal access to NVRAM */
	95	extern unsigned char nvram_read_byte(int i);
	96	extern void nvram_write_byte(unsigned char c, int i);
88ced031	97	#endif
1da177e4 LT	98
	99	/* Some offsets in XPRAM */
	100	#define PMAC_XPRAM_MACHINE_LOC 0xe4
	101	#define PMAC_XPRAM_SOUND_VOLUME 0x08
	102
	103	/* Machine location structure in PowerMac XPRAM */
	104	struct pmac_machine_location {
	105	unsigned int latitude; /* 2+30 bit Fractional number */
	106	unsigned int longitude; /* 2+30 bit Fractional number */
	107	unsigned int delta; /* mix of GMT delta and DLS */
	108	};
	109
	110	/*
	111	* /dev/nvram ioctls
	112	*
	113	* Note that PMAC_NVRAM_GET_OFFSET is still supported, but is
	114	* definitely obsolete. Do not use it if you can avoid it
	115	*/
	116
	117	#define OBSOLETE_PMAC_NVRAM_GET_OFFSET \
	118	_IOWR('p', 0x40, int)
	119
	120	#define IOC_NVRAM_GET_OFFSET _IOWR('p', 0x42, int) /* Get NVRAM partition offset */
c55377ee	121	#define IOC_NVRAM_SYNC _IO('p', 0x43) /* Sync NVRAM image */
1da177e4	122
c55377ee	123	#endif /* _ASM_POWERPC_NVRAM_H */