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- // SPDX-License-Identifier: GPL-2.0+
- /*
- * Copyright (C) 2019 Microchip Technology Inc. and its subsidiaries
- *
- * Author: Tudor Ambarus <tudor.ambarus@microchip.com>
- */
- #include <common.h>
- #include <dm.h>
- #include <env.h>
- #include <net.h>
- #include <linux/mtd/spi-nor.h>
- #include <netdev.h>
- #define ETH_ADDR_SIZE 6
- #ifdef CONFIG_SPI_FLASH_SST
- #define SFDP_MICROCHIP_MANUF_ID 0xbf
- #define SFDP_MICROCHIP_MEM_TYPE 0x26
- #define SFDP_MICROCHIP_DEV_ID 0x43
- #define SFDP_MICROCHIP_EUI_OFFSET 0x60
- #define SFDP_MICROCHIP_EUI48 0x30
- struct sst26vf064beui {
- u8 manufacturer_id;
- u8 memory_type;
- u8 device_id;
- u8 reserved;
- };
- /**
- * sst26vf064beui_check() - Check the validity of the EUI-48 information from
- * the sst26vf064beui SPI NOR Microchip SFDP table.
- * @manufacturer_sfdp: pointer to the Microchip manufacturer specific SFDP
- * table.
- *
- * Return: 0 on success, -errno otherwise.
- */
- static int sst26vf064beui_check(const u8 *manufacturer_sfdp)
- {
- struct sst26vf064beui *sst26vf064beui =
- (struct sst26vf064beui *)manufacturer_sfdp;
- if (sst26vf064beui->manufacturer_id != SFDP_MICROCHIP_MANUF_ID)
- return -EINVAL;
- if (sst26vf064beui->memory_type != SFDP_MICROCHIP_MEM_TYPE)
- return -EINVAL;
- if (sst26vf064beui->device_id != SFDP_MICROCHIP_DEV_ID)
- return -EINVAL;
- /*
- * Check if the EUI-48 MAC address is programmed in the next six address
- * locations.
- */
- if (manufacturer_sfdp[SFDP_MICROCHIP_EUI_OFFSET] !=
- SFDP_MICROCHIP_EUI48)
- return -EINVAL;
- return 0;
- }
- /**
- * sst26vf064beui_get_ethaddr() - Get the ethernet address from the
- * sst26vf064beui SPI NOR Microchip SFDP table.
- * @manufacturer_sfdp: pointer to the Microchip manufacturer specific SFDP
- * table.
- * @ethaddr: pointer where to fill the ethernet address
- * @size: size of the ethernet address.
- *
- * Return: 0 on success, -errno otherwise.
- */
- static int sst26vf064beui_get_ethaddr(const u8 *manufacturer_sfdp,
- u8 *ethaddr, size_t size)
- {
- u64 eui_table[2];
- u64 *p = (u64 *)&manufacturer_sfdp[SFDP_MICROCHIP_EUI_OFFSET];
- int i, ret;
- ret = sst26vf064beui_check(manufacturer_sfdp);
- if (ret)
- return ret;
- for (i = 0; i < 2; i++)
- eui_table[i] = le64_to_cpu(p[i]);
- /* Ethaddr starts at offset one. */
- memcpy(ethaddr, &((u8 *)eui_table)[1], size);
- return 0;
- }
- #endif
- /**
- * at91_spi_nor_set_ethaddr() - Retrieve and set the ethernet address from the
- * SPI NOR manufacturer specific SFDP table.
- */
- void at91_spi_nor_set_ethaddr(void)
- {
- struct udevice *dev;
- struct spi_nor *nor;
- const char *ethaddr_name = "ethaddr";
- u8 ethaddr[ETH_ADDR_SIZE] = {0};
- if (env_get(ethaddr_name))
- return;
- if (uclass_first_device_err(UCLASS_SPI_FLASH, &dev))
- return;
- nor = dev_get_uclass_priv(dev);
- if (!nor)
- return;
- if (!nor->manufacturer_sfdp)
- return;
- #ifdef CONFIG_SPI_FLASH_SST
- if (sst26vf064beui_get_ethaddr(nor->manufacturer_sfdp, ethaddr,
- ETH_ADDR_SIZE))
- return;
- #endif
- if (is_valid_ethaddr(ethaddr))
- eth_env_set_enetaddr(ethaddr_name, ethaddr);
- }
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