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