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/* SPDX-License-Identifier: GPL-2.0+ */
/*
* Library to support early TI EVM EEPROM handling
*
* Copyright (C) 2015-2016 Texas Instruments Incorporated - http://www.ti.com
*/
#ifndef __BOARD_DETECT_H
#define __BOARD_DETECT_H
/* TI EEPROM MAGIC Header identifier */
#define TI_EEPROM_HEADER_MAGIC 0xEE3355AA
#define TI_DEAD_EEPROM_MAGIC 0xADEAD12C
#define TI_EEPROM_HDR_NAME_LEN 8
#define TI_EEPROM_HDR_REV_LEN 4
#define TI_EEPROM_HDR_SERIAL_LEN 12
#define TI_EEPROM_HDR_CONFIG_LEN 32
#define TI_EEPROM_HDR_NO_OF_MAC_ADDR 3
#define TI_EEPROM_HDR_ETH_ALEN 6
/**
* struct ti_am_eeprom - This structure holds data read in from the
* AM335x, AM437x, AM57xx TI EVM EEPROMs.
* @header: This holds the magic number
* @name: The name of the board
* @version: Board revision
* @serial: Board serial number
* @config: Reserved
* @mac_addr: Any MAC addresses written in the EEPROM
*
* The data is this structure is read from the EEPROM on the board.
* It is used for board detection which is based on name. It is used
* to configure specific TI boards. This allows booting of multiple
* TI boards with a single MLO and u-boot.
*/
struct ti_am_eeprom {
unsigned int header;
char name[TI_EEPROM_HDR_NAME_LEN];
char version[TI_EEPROM_HDR_REV_LEN];
char serial[TI_EEPROM_HDR_SERIAL_LEN];
char config[TI_EEPROM_HDR_CONFIG_LEN];
char mac_addr[TI_EEPROM_HDR_NO_OF_MAC_ADDR][TI_EEPROM_HDR_ETH_ALEN];
} __attribute__ ((__packed__));
/* DRA7 EEPROM MAGIC Header identifier */
#define DRA7_EEPROM_HEADER_MAGIC 0xAA5533EE
#define DRA7_EEPROM_HDR_NAME_LEN 16
#define DRA7_EEPROM_HDR_CONFIG_LEN 4
/**
* struct dra7_eeprom - This structure holds data read in from the DRA7 EVM
* EEPROMs.
* @header: This holds the magic number
* @name: The name of the board
* @version_major: Board major version
* @version_minor: Board minor version
* @config: Board specific config options
* @emif1_size: Size of DDR attached to EMIF1
* @emif2_size: Size of DDR attached to EMIF2
*
* The data is this structure is read from the EEPROM on the board.
* It is used for board detection which is based on name. It is used
* to configure specific DRA7 boards. This allows booting of multiple
* DRA7 boards with a single MLO and u-boot.
*/
struct dra7_eeprom {
u32 header;
char name[DRA7_EEPROM_HDR_NAME_LEN];
u16 version_major;
u16 version_minor;
char config[DRA7_EEPROM_HDR_CONFIG_LEN];
u32 emif1_size;
u32 emif2_size;
} __attribute__ ((__packed__));
/**
* struct ti_common_eeprom - Null terminated, usable EEPROM contents.
* header: Magic number
* @name: NULL terminated name
* @version: NULL terminated version
* @serial: NULL terminated serial number
* @config: NULL terminated Board specific config options
* @mac_addr: MAC addresses
* @emif1_size: Size of the ddr available on emif1
* @emif2_size: Size of the ddr available on emif2
*/
struct ti_common_eeprom {
u32 header;
char name[TI_EEPROM_HDR_NAME_LEN + 1];
char version[TI_EEPROM_HDR_REV_LEN + 1];
char serial[TI_EEPROM_HDR_SERIAL_LEN + 1];
char config[TI_EEPROM_HDR_CONFIG_LEN + 1];
char mac_addr[TI_EEPROM_HDR_NO_OF_MAC_ADDR][TI_EEPROM_HDR_ETH_ALEN];
u64 emif1_size;
u64 emif2_size;
};
#define TI_EEPROM_DATA ((struct ti_common_eeprom *)\
TI_SRAM_SCRATCH_BOARD_EEPROM_START)
/**
* ti_i2c_eeprom_am_get() - Consolidated eeprom data collection for AM* TI EVMs
* @bus_addr: I2C bus address
* @dev_addr: I2C slave address
*
* ep in SRAM is populated by the this AM generic function that consolidates
* the basic initialization logic common across all AM* platforms.
*/
int ti_i2c_eeprom_am_get(int bus_addr, int dev_addr);
/**
* ti_i2c_eeprom_dra7_get() - Consolidated eeprom data for DRA7 TI EVMs
* @bus_addr: I2C bus address
* @dev_addr: I2C slave address
*/
int ti_i2c_eeprom_dra7_get(int bus_addr, int dev_addr);
/**
* board_ti_is() - Board detection logic for TI EVMs
* @name_tag: Tag used in eeprom for the board
*
* Return: false if board information does not match OR eeprom wasn't read.
* true otherwise
*/
bool board_ti_is(char *name_tag);
/**
* board_ti_rev_is() - Compare board revision for TI EVMs
* @rev_tag: Revision tag to check in eeprom
* @cmp_len: How many chars to compare?
*
* NOTE: revision information is often messed up (hence the str len match) :(
*
* Return: false if board information does not match OR eeprom wasn't read.
* true otherwise
*/
bool board_ti_rev_is(char *rev_tag, int cmp_len);
/**
* board_ti_get_rev() - Get board revision for TI EVMs
*
* Return: Empty string if eeprom wasn't read.
* Board revision otherwise
*/
char *board_ti_get_rev(void);
/**
* board_ti_get_config() - Get board config for TI EVMs
*
* Return: Empty string if eeprom wasn't read.
* Board config otherwise
*/
char *board_ti_get_config(void);
/**
* board_ti_get_name() - Get board name for TI EVMs
*
* Return: Empty string if eeprom wasn't read.
* Board name otherwise
*/
char *board_ti_get_name(void);
/**
* board_ti_get_eth_mac_addr() - Get Ethernet MAC address from EEPROM MAC list
* @index: 0 based index within the list of MAC addresses
* @mac_addr: MAC address contained at the index is returned here
*
* Does not sanity check the mac_addr. Whatever is stored in EEPROM is returned.
*/
void board_ti_get_eth_mac_addr(int index, u8 mac_addr[TI_EEPROM_HDR_ETH_ALEN]);
/**
* board_ti_get_emif1_size() - Get size of the DDR on emif1 for TI EVMs
*
* Return: NULL if eeprom wasn't read or emif1_size is not available.
*/
u64 board_ti_get_emif1_size(void);
/**
* board_ti_get_emif2_size() - Get size of the DDR on emif2 for TI EVMs
*
* Return: NULL if eeprom wasn't read or emif2_size is not available.
*/
u64 board_ti_get_emif2_size(void);
/**
* set_board_info_env() - Setup commonly used board information environment vars
* @name: Name of the board
*
* If name is NULL, default_name is used.
*/
void set_board_info_env(char *name);
/**
* board_ti_set_ethaddr- Sets the ethaddr environment from EEPROM
* @index: The first eth<index>addr environment variable to set
*
* EEPROM should be already read before calling this function.
* The EEPROM contains 2 MAC addresses which define the MAC address
* range (i.e. first and last MAC address).
* This function sets the ethaddr environment variable for all
* the available MAC addresses starting from eth<index>addr.
*/
void board_ti_set_ethaddr(int index);
/**
* board_ti_was_eeprom_read() - Check to see if the eeprom contents have been read
*
* This function is useful to determine if the eeprom has already been read and
* its contents have already been loaded into memory. It utiltzes the magic
* number that the header value is set to upon successful eeprom read.
*/
bool board_ti_was_eeprom_read(void);
/**
* ti_i2c_eeprom_am_set() - Setup the eeprom data with predefined values
* @name: Name of the board
* @rev: Revision of the board
*
* In some cases such as in RTC-only mode, we are able to skip reading eeprom
* and wasting i2c based initialization time by using predefined flags for
* detecting what platform we are booting on. For those platforms, provide
* a handy function to pre-program information.
*
* NOTE: many eeprom information such as serial number, mac address etc is not
* available.
*
* Return: 0 if all went fine, else return error.
*/
int ti_i2c_eeprom_am_set(const char *name, const char *rev);
#endif /* __BOARD_DETECT_H */
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