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- From ac8fcc92d87436715ce85f39a4fe4f07c3bfa15e Mon Sep 17 00:00:00 2001
- From: Luis Araneda <[email protected]>
- Date: Sun, 22 Jul 2018 02:52:41 -0400
- Subject: [U-Boot] [RFC PATCH] arm: zynq: read mac address from SPI flash memory
- Implement a method for reading the MAC address from an
- SPI flash memory.
- In particular, this method is used by the Zybo Z7 board
- to read the MAC address from the OTP region in the SPI NOR
- memory
- Signed-off-by: Luis Araneda <[email protected]>
- ---
- As of 2018-08-23, this patch has been sent to U-Boot's mailing list
- and is being reviewed. Some changes on the implementation are expected,
- but the functionality should not change
- ---
- board/xilinx/zynq/board.c | 28 ++++++++++++++++++++++++++++
- configs/zynq_zybo_z7_defconfig | 3 +++
- drivers/misc/Kconfig | 17 +++++++++++++++++
- 3 files changed, 48 insertions(+)
- --- a/board/xilinx/zynq/board.c
- +++ b/board/xilinx/zynq/board.c
- @@ -6,9 +6,12 @@
-
- #include <common.h>
- #include <dm/uclass.h>
- +#include <dm/device.h>
- +#include <dm/device-internal.h>
- #include <fdtdec.h>
- #include <fpga.h>
- #include <mmc.h>
- +#include <spi_flash.h>
- #include <watchdog.h>
- #include <wdt.h>
- #include <zynqpl.h>
- @@ -83,6 +86,31 @@ int zynq_board_read_rom_ethaddr(unsigned
- printf("I2C EEPROM MAC address read failed\n");
- #endif
-
- +#if defined(CONFIG_MAC_ADDR_IN_SPI_FLASH)
- + struct spi_flash *flash;
- + struct udevice *dev;
- + int ret;
- +
- + ret = spi_flash_probe_bus_cs(CONFIG_SF_DEFAULT_BUS,
- + CONFIG_SF_DEFAULT_CS,
- + 0, 0, &dev);
- + if (ret) {
- + printf("SPI(bus:%u cs:%u) probe failed\n",
- + CONFIG_SF_DEFAULT_BUS,
- + CONFIG_SF_DEFAULT_CS);
- + return 0;
- + }
- +
- + flash = dev_get_uclass_priv(dev);
- + flash->read_cmd = CONFIG_MAC_ADDR_SPI_FLASH_READ_CMD;
- +
- + if (spi_flash_read_dm(dev,
- + CONFIG_MAC_ADDR_SPI_FLASH_DATA_OFFSET,
- + 6, ethaddr))
- + printf("SPI MAC address read failed\n");
- +
- + device_remove(dev, DM_REMOVE_NORMAL);
- +#endif
- return 0;
- }
-
- --- a/configs/zynq_zybo_z7_defconfig
- +++ b/configs/zynq_zybo_z7_defconfig
- @@ -44,6 +44,9 @@ CONFIG_DM_GPIO=y
- CONFIG_SYS_I2C_ZYNQ=y
- CONFIG_ZYNQ_I2C0=y
- CONFIG_ZYNQ_I2C1=y
- +CONFIG_MAC_ADDR_IN_SPI_FLASH=y
- +CONFIG_MAC_ADDR_SPI_FLASH_READ_CMD=0x4b
- +CONFIG_MAC_ADDR_SPI_FLASH_DATA_OFFSET=0x20
- CONFIG_MMC_SDHCI=y
- CONFIG_MMC_SDHCI_ZYNQ=y
- CONFIG_SPI_FLASH=y
- --- a/drivers/misc/Kconfig
- +++ b/drivers/misc/Kconfig
- @@ -272,6 +272,23 @@ config SYS_I2C_EEPROM_ADDR_OVERFLOW
-
- endif
-
- +config MAC_ADDR_IN_SPI_FLASH
- + bool "MAC address in SPI flash"
- + help
- + Read MAC address from an SPI flash memory
- +
- +if MAC_ADDR_IN_SPI_FLASH
- +
- +config MAC_ADDR_SPI_FLASH_READ_CMD
- + hex "Read command for the SPI flash memory"
- + default 0
- +
- +config MAC_ADDR_SPI_FLASH_DATA_OFFSET
- + hex "Offset of MAC data in SPI flash memory"
- + default 0
- +
- +endif
- +
- config GDSYS_RXAUI_CTRL
- bool "Enable gdsys RXAUI control driver"
- depends on MISC
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