2 * Library to support early TI EVM EEPROM handling
4 * Copyright (C) 2015-2016 Texas Instruments Incorporated - http://www.ti.com
6 * SPDX-License-Identifier: GPL-2.0+
9 #ifndef __BOARD_DETECT_H
10 #define __BOARD_DETECT_H
12 /* TI EEPROM MAGIC Header identifier */
13 #define TI_EEPROM_HEADER_MAGIC 0xEE3355AA
14 #define TI_DEAD_EEPROM_MAGIC 0xADEAD12C
16 #define TI_EEPROM_HDR_NAME_LEN 8
17 #define TI_EEPROM_HDR_REV_LEN 4
18 #define TI_EEPROM_HDR_SERIAL_LEN 12
19 #define TI_EEPROM_HDR_CONFIG_LEN 32
20 #define TI_EEPROM_HDR_NO_OF_MAC_ADDR 3
21 #define TI_EEPROM_HDR_ETH_ALEN 6
24 * struct ti_am_eeprom - This structure holds data read in from the
25 * AM335x, AM437x, AM57xx TI EVM EEPROMs.
26 * @header: This holds the magic number
27 * @name: The name of the board
28 * @version: Board revision
29 * @serial: Board serial number
31 * @mac_addr: Any MAC addresses written in the EEPROM
33 * The data is this structure is read from the EEPROM on the board.
34 * It is used for board detection which is based on name. It is used
35 * to configure specific TI boards. This allows booting of multiple
36 * TI boards with a single MLO and u-boot.
40 char name[TI_EEPROM_HDR_NAME_LEN];
41 char version[TI_EEPROM_HDR_REV_LEN];
42 char serial[TI_EEPROM_HDR_SERIAL_LEN];
43 char config[TI_EEPROM_HDR_CONFIG_LEN];
44 char mac_addr[TI_EEPROM_HDR_NO_OF_MAC_ADDR][TI_EEPROM_HDR_ETH_ALEN];
45 } __attribute__ ((__packed__));
47 /* DRA7 EEPROM MAGIC Header identifier */
48 #define DRA7_EEPROM_HEADER_MAGIC 0xAA5533EE
49 #define DRA7_EEPROM_HDR_NAME_LEN 16
50 #define DRA7_EEPROM_HDR_CONFIG_LEN 4
53 * struct dra7_eeprom - This structure holds data read in from the DRA7 EVM
55 * @header: This holds the magic number
56 * @name: The name of the board
57 * @version_major: Board major version
58 * @version_minor: Board minor version
59 * @config: Board specific config options
60 * @emif1_size: Size of DDR attached to EMIF1
61 * @emif2_size: Size of DDR attached to EMIF2
63 * The data is this structure is read from the EEPROM on the board.
64 * It is used for board detection which is based on name. It is used
65 * to configure specific DRA7 boards. This allows booting of multiple
66 * DRA7 boards with a single MLO and u-boot.
70 char name[DRA7_EEPROM_HDR_NAME_LEN];
73 char config[DRA7_EEPROM_HDR_CONFIG_LEN];
76 } __attribute__ ((__packed__));
79 * struct ti_common_eeprom - Null terminated, usable EEPROM contents.
80 * header: Magic number
81 * @name: NULL terminated name
82 * @version: NULL terminated version
83 * @serial: NULL terminated serial number
84 * @config: NULL terminated Board specific config options
85 * @mac_addr: MAC addresses
86 * @emif1_size: Size of the ddr available on emif1
87 * @emif2_size: Size of the ddr available on emif2
89 struct ti_common_eeprom {
91 char name[TI_EEPROM_HDR_NAME_LEN + 1];
92 char version[TI_EEPROM_HDR_REV_LEN + 1];
93 char serial[TI_EEPROM_HDR_SERIAL_LEN + 1];
94 char config[TI_EEPROM_HDR_CONFIG_LEN + 1];
95 char mac_addr[TI_EEPROM_HDR_NO_OF_MAC_ADDR][TI_EEPROM_HDR_ETH_ALEN];
100 #define TI_EEPROM_DATA ((struct ti_common_eeprom *)\
101 OMAP_SRAM_SCRATCH_BOARD_EEPROM_START)
104 * ti_i2c_eeprom_am_get() - Consolidated eeprom data collection for AM* TI EVMs
105 * @bus_addr: I2C bus address
106 * @dev_addr: I2C slave address
108 * ep in SRAM is populated by the this AM generic function that consolidates
109 * the basic initialization logic common across all AM* platforms.
111 int ti_i2c_eeprom_am_get(int bus_addr, int dev_addr);
114 * ti_i2c_eeprom_dra7_get() - Consolidated eeprom data for DRA7 TI EVMs
115 * @bus_addr: I2C bus address
116 * @dev_addr: I2C slave address
118 int ti_i2c_eeprom_dra7_get(int bus_addr, int dev_addr);
121 * board_ti_is() - Board detection logic for TI EVMs
122 * @name_tag: Tag used in eeprom for the board
124 * Return: false if board information does not match OR eeprom wasn't read.
127 bool board_ti_is(char *name_tag);
130 * board_ti_rev_is() - Compare board revision for TI EVMs
131 * @rev_tag: Revision tag to check in eeprom
132 * @cmp_len: How many chars to compare?
134 * NOTE: revision information is often messed up (hence the str len match) :(
136 * Return: false if board information does not match OR eeprom was'nt read.
139 bool board_ti_rev_is(char *rev_tag, int cmp_len);
142 * board_ti_get_rev() - Get board revision for TI EVMs
144 * Return: NULL if eeprom was'nt read.
145 * Board revision otherwise
147 char *board_ti_get_rev(void);
150 * board_ti_get_config() - Get board config for TI EVMs
152 * Return: NULL if eeprom was'nt read.
153 * Board config otherwise
155 char *board_ti_get_config(void);
158 * board_ti_get_name() - Get board name for TI EVMs
160 * Return: NULL if eeprom was'nt read.
161 * Board name otherwise
163 char *board_ti_get_name(void);
166 * board_ti_get_eth_mac_addr() - Get Ethernet MAC address from EEPROM MAC list
167 * @index: 0 based index within the list of MAC addresses
168 * @mac_addr: MAC address contained at the index is returned here
170 * Does not sanity check the mac_addr. Whatever is stored in EEPROM is returned.
172 void board_ti_get_eth_mac_addr(int index, u8 mac_addr[TI_EEPROM_HDR_ETH_ALEN]);
175 * board_ti_get_emif1_size() - Get size of the DDR on emif1 for TI EVMs
177 * Return: NULL if eeprom was'nt read or emif1_size is not available.
179 u64 board_ti_get_emif1_size(void);
182 * board_ti_get_emif2_size() - Get size of the DDR on emif2 for TI EVMs
184 * Return: NULL if eeprom was'nt read or emif2_size is not available.
186 u64 board_ti_get_emif2_size(void);
189 * set_board_info_env() - Setup commonly used board information environment vars
190 * @name: Name of the board
192 * If name is NULL, default_name is used.
194 void set_board_info_env(char *name);
196 #endif /* __BOARD_DETECT_H */