mirror of
https://github.com/brain-hackers/u-boot-brain
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83d290c56f
When U-Boot started using SPDX tags we were among the early adopters and there weren't a lot of other examples to borrow from. So we picked the area of the file that usually had a full license text and replaced it with an appropriate SPDX-License-Identifier: entry. Since then, the Linux Kernel has adopted SPDX tags and they place it as the very first line in a file (except where shebangs are used, then it's second line) and with slightly different comment styles than us. In part due to community overlap, in part due to better tag visibility and in part for other minor reasons, switch over to that style. This commit changes all instances where we have a single declared license in the tag as both the before and after are identical in tag contents. There's also a few places where I found we did not have a tag and have introduced one. Signed-off-by: Tom Rini <trini@konsulko.com>
234 lines
7.3 KiB
C
234 lines
7.3 KiB
C
/* SPDX-License-Identifier: GPL-2.0+ */
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/*
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* Library to support early TI EVM EEPROM handling
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*
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* Copyright (C) 2015-2016 Texas Instruments Incorporated - http://www.ti.com
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*/
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#ifndef __BOARD_DETECT_H
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#define __BOARD_DETECT_H
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/* TI EEPROM MAGIC Header identifier */
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#define TI_EEPROM_HEADER_MAGIC 0xEE3355AA
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#define TI_DEAD_EEPROM_MAGIC 0xADEAD12C
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#define TI_EEPROM_HDR_NAME_LEN 8
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#define TI_EEPROM_HDR_REV_LEN 4
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#define TI_EEPROM_HDR_SERIAL_LEN 12
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#define TI_EEPROM_HDR_CONFIG_LEN 32
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#define TI_EEPROM_HDR_NO_OF_MAC_ADDR 3
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#define TI_EEPROM_HDR_ETH_ALEN 6
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/**
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* struct ti_am_eeprom - This structure holds data read in from the
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* AM335x, AM437x, AM57xx TI EVM EEPROMs.
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* @header: This holds the magic number
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* @name: The name of the board
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* @version: Board revision
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* @serial: Board serial number
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* @config: Reserved
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* @mac_addr: Any MAC addresses written in the EEPROM
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*
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* The data is this structure is read from the EEPROM on the board.
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* It is used for board detection which is based on name. It is used
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* to configure specific TI boards. This allows booting of multiple
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* TI boards with a single MLO and u-boot.
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*/
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struct ti_am_eeprom {
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unsigned int header;
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char name[TI_EEPROM_HDR_NAME_LEN];
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char version[TI_EEPROM_HDR_REV_LEN];
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char serial[TI_EEPROM_HDR_SERIAL_LEN];
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char config[TI_EEPROM_HDR_CONFIG_LEN];
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char mac_addr[TI_EEPROM_HDR_NO_OF_MAC_ADDR][TI_EEPROM_HDR_ETH_ALEN];
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} __attribute__ ((__packed__));
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/* DRA7 EEPROM MAGIC Header identifier */
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#define DRA7_EEPROM_HEADER_MAGIC 0xAA5533EE
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#define DRA7_EEPROM_HDR_NAME_LEN 16
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#define DRA7_EEPROM_HDR_CONFIG_LEN 4
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/**
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* struct dra7_eeprom - This structure holds data read in from the DRA7 EVM
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* EEPROMs.
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* @header: This holds the magic number
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* @name: The name of the board
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* @version_major: Board major version
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* @version_minor: Board minor version
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* @config: Board specific config options
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* @emif1_size: Size of DDR attached to EMIF1
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* @emif2_size: Size of DDR attached to EMIF2
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*
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* The data is this structure is read from the EEPROM on the board.
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* It is used for board detection which is based on name. It is used
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* to configure specific DRA7 boards. This allows booting of multiple
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* DRA7 boards with a single MLO and u-boot.
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*/
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struct dra7_eeprom {
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u32 header;
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char name[DRA7_EEPROM_HDR_NAME_LEN];
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u16 version_major;
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u16 version_minor;
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char config[DRA7_EEPROM_HDR_CONFIG_LEN];
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u32 emif1_size;
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u32 emif2_size;
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} __attribute__ ((__packed__));
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/**
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* struct ti_common_eeprom - Null terminated, usable EEPROM contents.
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* header: Magic number
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* @name: NULL terminated name
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* @version: NULL terminated version
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* @serial: NULL terminated serial number
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* @config: NULL terminated Board specific config options
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* @mac_addr: MAC addresses
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* @emif1_size: Size of the ddr available on emif1
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* @emif2_size: Size of the ddr available on emif2
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*/
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struct ti_common_eeprom {
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u32 header;
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char name[TI_EEPROM_HDR_NAME_LEN + 1];
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char version[TI_EEPROM_HDR_REV_LEN + 1];
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char serial[TI_EEPROM_HDR_SERIAL_LEN + 1];
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char config[TI_EEPROM_HDR_CONFIG_LEN + 1];
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char mac_addr[TI_EEPROM_HDR_NO_OF_MAC_ADDR][TI_EEPROM_HDR_ETH_ALEN];
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u64 emif1_size;
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u64 emif2_size;
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};
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#define TI_EEPROM_DATA ((struct ti_common_eeprom *)\
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TI_SRAM_SCRATCH_BOARD_EEPROM_START)
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/**
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* ti_i2c_eeprom_am_get() - Consolidated eeprom data collection for AM* TI EVMs
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* @bus_addr: I2C bus address
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* @dev_addr: I2C slave address
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*
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* ep in SRAM is populated by the this AM generic function that consolidates
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* the basic initialization logic common across all AM* platforms.
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*/
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int ti_i2c_eeprom_am_get(int bus_addr, int dev_addr);
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/**
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* ti_i2c_eeprom_dra7_get() - Consolidated eeprom data for DRA7 TI EVMs
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* @bus_addr: I2C bus address
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* @dev_addr: I2C slave address
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*/
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int ti_i2c_eeprom_dra7_get(int bus_addr, int dev_addr);
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/**
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* board_ti_is() - Board detection logic for TI EVMs
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* @name_tag: Tag used in eeprom for the board
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*
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* Return: false if board information does not match OR eeprom wasn't read.
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* true otherwise
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*/
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bool board_ti_is(char *name_tag);
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/**
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* board_ti_rev_is() - Compare board revision for TI EVMs
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* @rev_tag: Revision tag to check in eeprom
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* @cmp_len: How many chars to compare?
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*
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* NOTE: revision information is often messed up (hence the str len match) :(
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*
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* Return: false if board information does not match OR eeprom wasn't read.
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* true otherwise
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*/
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bool board_ti_rev_is(char *rev_tag, int cmp_len);
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/**
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* board_ti_get_rev() - Get board revision for TI EVMs
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*
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* Return: Empty string if eeprom wasn't read.
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* Board revision otherwise
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*/
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char *board_ti_get_rev(void);
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/**
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* board_ti_get_config() - Get board config for TI EVMs
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*
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* Return: Empty string if eeprom wasn't read.
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* Board config otherwise
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*/
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char *board_ti_get_config(void);
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/**
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* board_ti_get_name() - Get board name for TI EVMs
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*
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* Return: Empty string if eeprom wasn't read.
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* Board name otherwise
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*/
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char *board_ti_get_name(void);
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/**
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* board_ti_get_eth_mac_addr() - Get Ethernet MAC address from EEPROM MAC list
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* @index: 0 based index within the list of MAC addresses
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* @mac_addr: MAC address contained at the index is returned here
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*
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* Does not sanity check the mac_addr. Whatever is stored in EEPROM is returned.
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*/
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void board_ti_get_eth_mac_addr(int index, u8 mac_addr[TI_EEPROM_HDR_ETH_ALEN]);
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/**
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* board_ti_get_emif1_size() - Get size of the DDR on emif1 for TI EVMs
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*
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* Return: NULL if eeprom wasn't read or emif1_size is not available.
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*/
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u64 board_ti_get_emif1_size(void);
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/**
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* board_ti_get_emif2_size() - Get size of the DDR on emif2 for TI EVMs
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*
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* Return: NULL if eeprom wasn't read or emif2_size is not available.
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*/
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u64 board_ti_get_emif2_size(void);
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/**
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* set_board_info_env() - Setup commonly used board information environment vars
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* @name: Name of the board
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*
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* If name is NULL, default_name is used.
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*/
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void set_board_info_env(char *name);
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/**
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* board_ti_set_ethaddr- Sets the ethaddr environment from EEPROM
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* @index: The first eth<index>addr environment variable to set
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*
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* EEPROM should be already read before calling this function.
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* The EEPROM contains 2 MAC addresses which define the MAC address
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* range (i.e. first and last MAC address).
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* This function sets the ethaddr environment variable for all
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* the available MAC addresses starting from eth<index>addr.
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*/
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void board_ti_set_ethaddr(int index);
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/**
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* board_ti_was_eeprom_read() - Check to see if the eeprom contents have been read
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*
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* This function is useful to determine if the eeprom has already been read and
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* its contents have already been loaded into memory. It utiltzes the magic
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* number that the header value is set to upon successful eeprom read.
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*/
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bool board_ti_was_eeprom_read(void);
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/**
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* ti_i2c_eeprom_am_set() - Setup the eeprom data with predefined values
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* @name: Name of the board
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* @rev: Revision of the board
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*
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* In some cases such as in RTC-only mode, we are able to skip reading eeprom
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* and wasting i2c based initialization time by using predefined flags for
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* detecting what platform we are booting on. For those platforms, provide
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* a handy function to pre-program information.
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*
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* NOTE: many eeprom information such as serial number, mac address etc is not
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* available.
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*
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* Return: 0 if all went fine, else return error.
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*/
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int ti_i2c_eeprom_am_set(const char *name, const char *rev);
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#endif /* __BOARD_DETECT_H */
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