From: Tudor Ambarus tudor.ambarus@microchip.com
The SST26VF064BEUI spi-nor flash is programmed at the factory with a globally unique address stored in the SFDP vendor parameter table and it is permanently writeprotected. Retrieve the EUI-48 address and set it as ethaddr env.
Signed-off-by: Tudor Ambarus tudor.ambarus@microchip.com --- arch/arm/mach-at91/include/mach/at91_common.h | 1 + board/atmel/common/Makefile | 1 + board/atmel/common/mac-spi-nor.c | 127 +++++++++++++++++++++ .../atmel/sama5d27_wlsom1_ek/sama5d27_wlsom1_ek.c | 3 + 4 files changed, 132 insertions(+) create mode 100644 board/atmel/common/mac-spi-nor.c
diff --git a/arch/arm/mach-at91/include/mach/at91_common.h b/arch/arm/mach-at91/include/mach/at91_common.h index e929b5e1d207..01e00c508a8a 100644 --- a/arch/arm/mach-at91/include/mach/at91_common.h +++ b/arch/arm/mach-at91/include/mach/at91_common.h @@ -40,6 +40,7 @@ void configure_ddrcfg_input_buffers(bool open); #endif
int at91_set_ethaddr(int offset); +void at91_spi_nor_set_ethaddr(void); int at91_video_show_board_info(void);
#endif /* AT91_COMMON_H */ diff --git a/board/atmel/common/Makefile b/board/atmel/common/Makefile index 4de0912f22e6..6bc8cabb8d6d 100644 --- a/board/atmel/common/Makefile +++ b/board/atmel/common/Makefile @@ -5,4 +5,5 @@
obj-y += board.o obj-$(CONFIG_I2C_EEPROM) += mac_eeprom.o +obj-$(CONFIG_SPI_FLASH_SFDP_SUPPORT) += mac-spi-nor.o obj-$(CONFIG_DM_VIDEO) += video_display.o diff --git a/board/atmel/common/mac-spi-nor.c b/board/atmel/common/mac-spi-nor.c new file mode 100644 index 000000000000..96343678e0b6 --- /dev/null +++ b/board/atmel/common/mac-spi-nor.c @@ -0,0 +1,127 @@ +// 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 <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); +} diff --git a/board/atmel/sama5d27_wlsom1_ek/sama5d27_wlsom1_ek.c b/board/atmel/sama5d27_wlsom1_ek/sama5d27_wlsom1_ek.c index fda06c824d53..fc563ebb7150 100644 --- a/board/atmel/sama5d27_wlsom1_ek/sama5d27_wlsom1_ek.c +++ b/board/atmel/sama5d27_wlsom1_ek/sama5d27_wlsom1_ek.c @@ -68,6 +68,9 @@ int board_init(void) #ifdef CONFIG_MISC_INIT_R int misc_init_r(void) { +#ifdef CONFIG_SPI_FLASH_SFDP_SUPPORT + at91_spi_nor_set_ethaddr(); +#endif return 0; } #endif