Read SoM information from EEPROM and set ethaddr in late init.
Signed-off-by: Wadim Egorov w.egorov@phytec.de --- board/phytec/phycore_rk3288/phycore-rk3288.c | 60 ++++++++++++++++++++++++++++ board/phytec/phycore_rk3288/som.h | 21 ++++++++++ configs/phycore-rk3288_defconfig | 2 + 3 files changed, 83 insertions(+) create mode 100644 board/phytec/phycore_rk3288/som.h
diff --git a/board/phytec/phycore_rk3288/phycore-rk3288.c b/board/phytec/phycore_rk3288/phycore-rk3288.c index 20696f6..e8b2e07 100644 --- a/board/phytec/phycore_rk3288/phycore-rk3288.c +++ b/board/phytec/phycore_rk3288/phycore-rk3288.c @@ -5,4 +5,64 @@ * SPDX-License-Identifier: GPL-2.0+ */
+#include <asm/io.h> #include <common.h> +#include <dm.h> +#include <i2c.h> +#include <i2c_eeprom.h> +#include <netdev.h> +#include "som.h" + +static int valid_rk3288_som(struct rk3288_som *som) +{ + unsigned char *p = (unsigned char *)som; + unsigned char *e = p + sizeof(struct rk3288_som) - 1; + int hw = 0; + + while (p < e) { + hw += hweight8(*p); + p++; + } + + return hw == som->bs; +} + +int rk_board_late_init(void) +{ + int ret; + struct udevice *dev; + struct rk3288_som opt; + int off; + + /* Get the identificatioin page of M24C32-D EEPROM */ + off = fdt_path_offset(gd->fdt_blob, "eeprom0"); + if (!off) + return off; + + ret = uclass_get_device_by_of_offset(UCLASS_I2C_EEPROM, off, &dev); + if (ret) { + printf("%s: Could not find EEPROM\n", __func__); + return ret; + } + + ret = i2c_set_chip_offset_len(dev, 2); + if (ret) + return ret; + + ret = i2c_eeprom_read(dev, 0, (uint8_t *)&opt, + sizeof(struct rk3288_som)); + if (ret) { + printf("%s: Could not read EEPROM\n", __func__); + return ret; + } + + if (opt.api_version != 0 || !valid_rk3288_som(&opt)) { + printf("Invalid data or wrong EEPROM layout version.\n"); + /* Proceed anyway, since there is no fallback option */ + } + + if (is_valid_ethaddr(opt.mac)) + eth_setenv_enetaddr("ethaddr", opt.mac); + + return 0; +} diff --git a/board/phytec/phycore_rk3288/som.h b/board/phytec/phycore_rk3288/som.h new file mode 100644 index 0000000..1b7f9a1 --- /dev/null +++ b/board/phytec/phycore_rk3288/som.h @@ -0,0 +1,21 @@ +/* + * Copyright (C) 2017 PHYTEC Messtechnik GmbH + * Author: Wadim Egorov w.egorov@phytec.de + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +/* + * rk3288_som struct represents the eeprom layout for PHYTEC RK3288 based SoMs + */ +struct rk3288_som { + unsigned char api_version; /* EEPROM layout API version */ + unsigned char mod_version; /* PCM/PFL/PCA */ + unsigned char option[12]; /* coding for variants */ + unsigned char som_rev; /* SOM revision */ + unsigned char mac[6]; + unsigned char ksp; /* 1: KSP, 2: KSM */ + unsigned char kspno; /* Number for KSP/KSM module */ + unsigned char reserved[8]; /* not used */ + unsigned char bs; /* Bits set in previous bytes */ +} __attribute__ ((__packed__)); diff --git a/configs/phycore-rk3288_defconfig b/configs/phycore-rk3288_defconfig index 823db06..bd31e4e 100644 --- a/configs/phycore-rk3288_defconfig +++ b/configs/phycore-rk3288_defconfig @@ -42,6 +42,8 @@ CONFIG_CLK=y CONFIG_SPL_CLK=y CONFIG_ROCKCHIP_GPIO=y CONFIG_SYS_I2C_ROCKCHIP=y +CONFIG_MISC=y +CONFIG_I2C_EEPROM=y CONFIG_MMC_DW=y CONFIG_MMC_DW_ROCKCHIP=y CONFIG_DM_ETH=y