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/* SPDX-License-Identifier: GPL-2.0+
*
* Copyright 2022 DENX Software Engineering GmbH, Philip Oberfichtner <pro@denx.de>
*/
#define DH_EEPROM_ID_PAGE_MAX_SIZE 64
enum eip_request_values {
DH_MAC0,
DH_MAC1,
DH_ITEM_NUMBER,
DH_SERIAL_NUMBER,
};
/* DH item: Vendor coding */
#define DH_ITEM_PREFIX_NXP 0x01
#define DH_ITEM_PREFIX_NXP_CHR 'I'
#define DH_ITEM_PREFIX_ST 0x02
#define DH_ITEM_PREFIX_ST_CHR 'S'
/*
* DH item: Finished state coding
* Bit = 0 means half finished
* Prefix is 'H'
* Bit = 1 means finished with a customer image flashed
* Prefix is 'F'
*/
#define DH_ITEM_PREFIX_FIN_BIT BIT(7)
#define DH_ITEM_PREFIX_FIN_HALF_CHR 'H'
#define DH_ITEM_PREFIX_FIN_FLASHED_CHR 'F'
struct eeprom_id_page {
/* Header */
struct {
u8 id[3]; /* Identifier 'D', 'H', 'E' - 'D' is at index 0 */
u8 version; /* 0x10 -- Version 1.0 */
u8 crc16_pl[2]; /* Checksum payload, [1] is MSbyte */
u8 crc8_hdr; /* Checksum header */
} hdr;
/* Payload */
struct {
u8 mac0[6];
u8 mac1[6];
u8 item_prefix; /* H/F is coded in MSbits, Vendor coding starts at LSbits */
u8 item_num[3]; /* [2] is MSbyte */
u8 serial[9]; /* [8] is MSbyte */
} pl;
};
#define DH_EEPROM_ID_PAGE_V1_0 0x10
/*
* dh_mac_is_in_env - Check if MAC address is already set
*
* @env: name of environment variable
* Return: true if MAC is set, false otherwise
*/
bool dh_mac_is_in_env(const char *env);
/*
* dh_get_mac_is_enabled - Test if ethernet MAC is enabled in DT
*
* @alias: alias for ethernet MAC device tree node
* Return: 0 if OK, other value on error
*/
int dh_get_mac_is_enabled(const char *alias);
/*
* dh_get_mac_from_eeprom - Get MAC address from eeprom and write it to enetaddr
*
* @enetaddr: buffer where address is to be stored
* @alias: alias for EEPROM device tree node
* Return: 0 if OK, other value on error
*/
int dh_get_mac_from_eeprom(unsigned char *enetaddr, const char *alias);
/*
* dh_read_eeprom_id_page() - Read EEPROM ID page content into given buffer
* @eeprom_buffer: Buffer for EEPROM ID page content
* @alias: Alias for EEPROM ID page device tree node
*
* Read the content of the EEPROM ID page into the given buffer (parameter
* eeprom_buffer). The EEPROM ID page device is selected via alias device
* tree name (parameter alias). The data of the EEPROM ID page is verified.
* An error is returned for reading failures and invalid data.
*
* Return: 0 if OK, other value on error
*/
int dh_read_eeprom_id_page(u8 *eeprom_buffer, const char *alias);
/*
* dh_get_value_from_eeprom_buffer() - Get value from EEPROM buffer
* @eip_request_values: Requested value as enum
* @data: Buffer where value is to be stored
* @data_len: Length of the value buffer
* @eip: Pointer to EEPROM ID page struct from which the data is parsed
*
* Gets the value specified by the parameter eip_request_values from the EEPROM
* data struct (parameter eip). The data is written to the specified data
* buffer (parameter data). If the length of the data (parameter data_len) is
* not sufficient to copy the data into the buffer, an error is returned.
*
* Return: 0 if OK, other value on error
*/
int dh_get_value_from_eeprom_buffer(enum eip_request_values request, u8 *data, int data_len,
struct eeprom_id_page *eip);
/*
* dh_setup_mac_address - Try to get MAC address from various locations and write it to env
*
* Return: 0 if OK, other value on error
*/
int dh_setup_mac_address(struct eeprom_id_page *eip);
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