[U-Boot] [PATCH 2/4] board: atmel: sama5d27_wlsom1_ek: Set ethaddr from spi-nor flash
Tudor.Ambarus at microchip.com
Tudor.Ambarus at microchip.com
Tue Oct 1 08:59:26 UTC 2019
From: Tudor Ambarus <tudor.ambarus at 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 at 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 at 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
--
2.9.5
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