/*
* Copyright (C) 2012 CERN (www.cern.ch)
* Author: Alessandro Rubini <[email protected]>
*
* Released according to the GNU GPL, version 2 or any later version.
*
* This work is part of the White Rabbit project, a research effort led
* by CERN, the European Institute for Nuclear Research.
*/
#ifndef __LINUX_IPMI_FRU_H__
#define __LINUX_IPMI_FRU_H__
#ifdef __KERNEL__
# include <linux/types.h>
# include <linux/string.h>
#else
# include <stdint.h>
# include <string.h>
#endif

/*
* These structures match the unaligned crap we have in FRU1011.pdf
* (http://download.intel.com/design/servers/ipmi/FRU1011.pdf)
*/

/* chapter 8, page 5 */
struct fru_common_header {
uint8_t format; /* 0x01 */
uint8_t internal_use_off; /* multiple of 8 bytes */
uint8_t chassis_info_off; /* multiple of 8 bytes */
uint8_t board_area_off; /* multiple of 8 bytes */
uint8_t product_area_off; /* multiple of 8 bytes */
uint8_t multirecord_off; /* multiple of 8 bytes */
uint8_t pad; /* must be 0 */
uint8_t checksum; /* sum modulo 256 must be 0 */
};

/* chapter 9, page 5 -- internal_use: not used by us */

/* chapter 10, page 6 -- chassis info: not used by us */

/* chapter 13, page 9 -- used by board_info_area below */
struct fru_type_length {
uint8_t type_length;
uint8_t data[0];
};

/* chapter 11, page 7 */
struct fru_board_info_area {
uint8_t format; /* 0x01 */
uint8_t area_len; /* multiple of 8 bytes */
uint8_t language; /* I hope it's 0 */
uint8_t mfg_date[3]; /* LSB, minutes since 1996-01-01 */
struct fru_type_length tl[0]; /* type-length stuff follows */

/*
* the TL there are in order:
* Board Manufacturer
* Board Product Name
* Board Serial Number
* Board Part Number
* FRU File ID (may be null)
* more manufacturer-specific stuff
* 0xc1 as a terminator
* 0x00 pad to a multiple of 8 bytes - 1
* checksum (sum of all stuff module 256 must be zero)
*/
};

enum fru_type {
FRU_TYPE_BINARY = 0x00,
FRU_TYPE_BCDPLUS = 0x40,
FRU_TYPE_ASCII6 = 0x80,
FRU_TYPE_ASCII = 0xc0, /* not ascii: depends on language */
};

/*
* some helpers
*/
static inline struct fru_board_info_area *fru_get_board_area(
const struct fru_common_header *header)
{
/* we know for sure that the header is 8 bytes in size */
return (struct fru_board_info_area *)(header + header->board_area_off);
}

static inline int fru_type(struct fru_type_length *tl)
{
return tl->type_length & 0xc0;
}

static inline int fru_length(struct fru_type_length *tl)
{
return (tl->type_length & 0x3f) + 1; /* len of whole record */
}

/* assume ascii-latin1 encoding */
static inline int fru_strlen(struct fru_type_length *tl)
{
return fru_length(tl) - 1;
}

static inline char *fru_strcpy(char *dest, struct fru_type_length *tl)
{
int len = fru_strlen(tl);
memcpy(dest, tl->data, len);
dest[len] = '\0';
return dest;
}

static inline struct fru_type_length *fru_next_tl(struct fru_type_length *tl)
{
return tl + fru_length(tl);
}

static inline int fru_is_eof(struct fru_type_length *tl)
{
return tl->type_length == 0xc1;
}

/*
* External functions defined in fru-parse.c.
*/
extern int fru_header_cksum_ok(struct fru_common_header *header);
extern int fru_bia_cksum_ok(struct fru_board_info_area *bia);

/* All these 4 return allocated strings by calling fru_alloc() */
extern char *fru_get_board_manufacturer(struct fru_common_header *header);
extern char *fru_get_product_name(struct fru_common_header *header);
extern char *fru_get_serial_number(struct fru_common_header *header);
extern char *fru_get_part_number(struct fru_common_header *header);

/* This must be defined by the caller of the above functions */
extern void *fru_alloc(size_t size);

#endif /* __LINUX_IMPI_FRU_H__ */