[GitHub/mt8127/android_kernel_alcatel_ttab.git] / arch / powerpc / include / asm / 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

/* Signatures for nvram partitions */
#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" */

#ifdef __KERNEL__

#include <linux/errno.h>
#include <linux/list.h>

#ifdef CONFIG_PPC_PSERIES
extern int nvram_write_error_log(char * buff, int length,
					 unsigned int err_type, unsigned int err_seq);
extern int nvram_read_error_log(char * buff, int length,
					 unsigned int * err_type, unsigned int *err_seq);
extern int nvram_clear_error_log(void);
extern int pSeries_nvram_init(void);
#endif /* CONFIG_PPC_PSERIES */

#ifdef CONFIG_MMIO_NVRAM
extern int mmio_nvram_init(void);
#else
static inline int mmio_nvram_init(void)
{
	return -ENODEV;
}
#endif

extern int __init nvram_scan_partitions(void);
extern loff_t nvram_create_partition(const char *name, int sig,
				     int req_size, int min_size);
extern int nvram_remove_partition(const char *name, int sig,
					const char *exceptions[]);
extern int nvram_get_partition_size(loff_t data_index);
extern loff_t nvram_find_partition(const char *name, int sig, int *out_size);

#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);

/* Determine NVRAM size */
extern ssize_t nvram_get_size(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	12
74d51d02	13	/* Signatures for nvram partitions */
1da177e4 LT	14	#define NVRAM_SIG_SP 0x02 /* support processor */
	15	#define NVRAM_SIG_OF 0x50 /* open firmware config */
	16	#define NVRAM_SIG_FW 0x51 /* general firmware */
	17	#define NVRAM_SIG_HW 0x52 /* hardware (VPD) */
	18	#define NVRAM_SIG_FLIP 0x5a /* Apple flip/flop header */
	19	#define NVRAM_SIG_APPL 0x5f /* Apple "system" (???) */
	20	#define NVRAM_SIG_SYS 0x70 /* system env vars */
	21	#define NVRAM_SIG_CFG 0x71 /* config data */
	22	#define NVRAM_SIG_ELOG 0x72 /* error log */
	23	#define NVRAM_SIG_VEND 0x7e /* vendor defined */
	24	#define NVRAM_SIG_FREE 0x7f /* Free space */
	25	#define NVRAM_SIG_OS 0xa0 /* OS defined */
	26	#define NVRAM_SIG_PANIC 0xa1 /* Apple OSX "panic" */
	27
88ced031	28	#ifdef __KERNEL__
134d4956	29
74d51d02	30	#include <linux/errno.h>
134d4956 AM	31	#include <linux/list.h>
134d4956 AM	32
edc79a2f	33	#ifdef CONFIG_PPC_PSERIES
0f2342c8 LV	34	extern int nvram_write_error_log(char * buff, int length,
	35	unsigned int err_type, unsigned int err_seq);
	36	extern int nvram_read_error_log(char * buff, int length,
	37	unsigned int * err_type, unsigned int *err_seq);
1da177e4	38	extern int nvram_clear_error_log(void);
1da177e4	39	extern int pSeries_nvram_init(void);
edc79a2f	40	#endif /* CONFIG_PPC_PSERIES */
4751505c IK	41
4751505c IK	42	#ifdef CONFIG_MMIO_NVRAM
f3f66f59	43	extern int mmio_nvram_init(void);
4751505c IK	44	#else
	45	static inline int mmio_nvram_init(void)
	46	{
	47	return -ENODEV;
	48	}
	49	#endif
	50
edc79a2f BH	51	extern int __init nvram_scan_partitions(void);
	52	extern loff_t nvram_create_partition(const char *name, int sig,
	53	int req_size, int min_size);
0f4ac132 JK	54	extern int nvram_remove_partition(const char *name, int sig,
0f4ac132 JK	55	const char *exceptions[]);
edc79a2f BH	56	extern int nvram_get_partition_size(loff_t data_index);
	57	extern loff_t nvram_find_partition(const char name, int sig, int out_size);
	58
88ced031	59	#endif /* __KERNEL__ */
1da177e4 LT	60
	61	/* PowerMac specific nvram stuffs */
	62
	63	enum {
	64	pmac_nvram_OF, /* Open Firmware partition */
	65	pmac_nvram_XPRAM, /* MacOS XPRAM partition */
	66	pmac_nvram_NR /* MacOS Name Registry partition */
	67	};
	68
88ced031	69	#ifdef __KERNEL__
1da177e4 LT	70	/* Return partition offset in nvram */
	71	extern int pmac_get_partition(int partition);
	72
	73	/* Direct access to XPRAM on PowerMacs */
	74	extern u8 pmac_xpram_read(int xpaddr);
	75	extern void pmac_xpram_write(int xpaddr, u8 data);
	76
	77	/* Synchronize NVRAM */
c55377ee PM	78	extern void nvram_sync(void);
c55377ee PM	79
d331d830 MW	80	/* Determine NVRAM size */
	81	extern ssize_t nvram_get_size(void);
	82
c55377ee PM	83	/* Normal access to NVRAM */
	84	extern unsigned char nvram_read_byte(int i);
	85	extern void nvram_write_byte(unsigned char c, int i);
88ced031	86	#endif
1da177e4 LT	87
	88	/* Some offsets in XPRAM */
	89	#define PMAC_XPRAM_MACHINE_LOC 0xe4
	90	#define PMAC_XPRAM_SOUND_VOLUME 0x08
	91
	92	/* Machine location structure in PowerMac XPRAM */
	93	struct pmac_machine_location {
	94	unsigned int latitude; /* 2+30 bit Fractional number */
	95	unsigned int longitude; /* 2+30 bit Fractional number */
	96	unsigned int delta; /* mix of GMT delta and DLS */
	97	};
	98
	99	/*
	100	* /dev/nvram ioctls
	101	*
	102	* Note that PMAC_NVRAM_GET_OFFSET is still supported, but is
	103	* definitely obsolete. Do not use it if you can avoid it
	104	*/
	105
	106	#define OBSOLETE_PMAC_NVRAM_GET_OFFSET \
	107	_IOWR('p', 0x40, int)
	108
	109	#define IOC_NVRAM_GET_OFFSET _IOWR('p', 0x42, int) /* Get NVRAM partition offset */
c55377ee	110	#define IOC_NVRAM_SYNC _IO('p', 0x43) /* Sync NVRAM image */
1da177e4	111
c55377ee	112	#endif /* _ASM_POWERPC_NVRAM_H */