avionic design with actual uboot and tooling

submodule of avionic design uboot bootloader and with included tools to
get you started , read readme.md and readme-tk1-loader.md

u-boot/board/freescale/mx25pdk/Kconfig

@@ -0,0 +1,15 @@
+if TARGET_MX25PDK
+
+config SYS_BOARD
+	default "mx25pdk"
+
+config SYS_VENDOR
+	default "freescale"
+
+config SYS_SOC
+	default "mx25"
+
+config SYS_CONFIG_NAME
+	default "mx25pdk"
+
+endif

u-boot/board/freescale/mx25pdk/MAINTAINERS

@@ -0,0 +1,6 @@
+MX25PDK BOARD
+M:	Fabio Estevam <fabio.estevam@nxp.com>
+S:	Maintained
+F:	board/freescale/mx25pdk/
+F:	include/configs/mx25pdk.h
+F:	configs/mx25pdk_defconfig

u-boot/board/freescale/mx25pdk/Makefile

@@ -0,0 +1,9 @@
+#
+# Copyright (C) 2007, Guennadi Liakhovetski <lg@denx.de>
+#
+# (C) Copyright 2011 Freescale Semiconductor, Inc.
+#
+# SPDX-License-Identifier:	GPL-2.0+
+#
+
+obj-y	:= mx25pdk.o

u-boot/board/freescale/mx25pdk/imximage.cfg

@@ -0,0 +1,65 @@
+/*
+ * (C) Copyright 2009
+ * Stefano Babic DENX Software Engineering sbabic@denx.de.
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ *
+ * Refer doc/README.imximage for more details about how-to configure
+ * and create imximage boot image
+ *
+ * The syntax is taken as close as possible with the kwbimage
+ */
+
+/*
+ * Boot Device : one of
+ * spi, sd (the board has no nand neither onenand)
+ */
+BOOT_FROM	sd
+
+/*
+ * Device Configuration Data (DCD)
+ *
+ * Each entry must have the format:
+ * Addr-type           Address        Value
+ *
+ * where:
+ *	Addr-type register length (1,2 or 4 bytes)
+ *	Address	  absolute address of the register
+ *	value	  value to be stored in the register
+ */
+/* EIM config-CS5 init -- CPLD */
+DATA 4 0xB8002050 0x0000D843
+DATA 4 0xB8002054 0x22252521
+DATA 4 0xB8002058 0x22220A00
+
+/* DDR2 init */
+DATA 4 0xB8001004 0x0076E83A
+DATA 4 0xB8001010 0x00000204
+DATA 4 0xB8001000 0x92210000
+DATA 4 0x80000f00 0x12344321
+DATA 4 0xB8001000 0xB2210000
+DATA 1 0x82000000 0xda
+DATA 1 0x83000000 0xda
+DATA 1 0x81000400 0xda
+DATA 1 0x80000333 0xda
+
+DATA 4 0xB8001000 0x92210000
+DATA 1 0x80000400 0x12345678
+
+DATA 4 0xB8001000 0xA2210000
+DATA 4 0x80000000 0x87654321
+DATA 4 0x80000000 0x87654321
+
+DATA 4 0xB8001000 0xB2210000
+DATA 1 0x80000233 0xda
+DATA 1 0x81000780 0xda
+DATA 1 0x81000400 0xda
+DATA 4 0xB8001000 0x82216080
+DATA 4 0x43FAC454 0x00001000
+
+DATA 4 0x53F80008 0x20034000
+
+/* Enable the clocks */
+DATA 4 0x53f8000c 0x1fffffff
+DATA 4 0x53f80010 0xffffffff
+DATA 4 0x53f80014 0xfdfff

u-boot/board/freescale/mx25pdk/mx25pdk.c

@@ -0,0 +1,191 @@
+/*
+ * (C) Copyright 2011 Freescale Semiconductor, Inc.
+ *
+ * Author: Fabio Estevam <fabio.estevam@freescale.com>
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <common.h>
+#include <asm/io.h>
+#include <asm/gpio.h>
+#include <asm/arch/imx-regs.h>
+#include <asm/arch/iomux-mx25.h>
+#include <asm/arch/clock.h>
+#include <mmc.h>
+#include <fsl_esdhc.h>
+#include <i2c.h>
+#include <power/pmic.h>
+#include <fsl_pmic.h>
+#include <mc34704.h>
+
+#define FEC_RESET_B		IMX_GPIO_NR(4, 8)
+#define FEC_ENABLE_B		IMX_GPIO_NR(2, 3)
+#define CARD_DETECT		IMX_GPIO_NR(2, 1)
+
+DECLARE_GLOBAL_DATA_PTR;
+
+#ifdef CONFIG_FSL_ESDHC
+struct fsl_esdhc_cfg esdhc_cfg[1] = {
+	{IMX_MMC_SDHC1_BASE},
+};
+#endif
+
+/*
+ * FIXME: need to revisit this
+ * The original code enabled PUE and 100-k pull-down without PKE, so the right
+ * value here is likely:
+ *	0 for no pull
+ * or:
+ *	PAD_CTL_PUS_100K_DOWN for 100-k pull-down
+ */
+#define FEC_OUT_PAD_CTRL	0
+
+#define I2C_PAD_CTRL		(PAD_CTL_HYS | PAD_CTL_PUS_100K_UP | \
+				 PAD_CTL_ODE)
+
+static void mx25pdk_fec_init(void)
+{
+	static const iomux_v3_cfg_t fec_pads[] = {
+		MX25_PAD_FEC_TX_CLK__FEC_TX_CLK,
+		MX25_PAD_FEC_RX_DV__FEC_RX_DV,
+		MX25_PAD_FEC_RDATA0__FEC_RDATA0,
+		NEW_PAD_CTRL(MX25_PAD_FEC_TDATA0__FEC_TDATA0, FEC_OUT_PAD_CTRL),
+		NEW_PAD_CTRL(MX25_PAD_FEC_TX_EN__FEC_TX_EN, FEC_OUT_PAD_CTRL),
+		NEW_PAD_CTRL(MX25_PAD_FEC_MDC__FEC_MDC, FEC_OUT_PAD_CTRL),
+		MX25_PAD_FEC_MDIO__FEC_MDIO,
+		MX25_PAD_FEC_RDATA1__FEC_RDATA1,
+		NEW_PAD_CTRL(MX25_PAD_FEC_TDATA1__FEC_TDATA1, FEC_OUT_PAD_CTRL),
+
+		NEW_PAD_CTRL(MX25_PAD_D12__GPIO_4_8, 0), /* FEC_RESET_B */
+		NEW_PAD_CTRL(MX25_PAD_A17__GPIO_2_3, 0), /* FEC_ENABLE_B */
+	};
+
+	static const iomux_v3_cfg_t i2c_pads[] = {
+		NEW_PAD_CTRL(MX25_PAD_I2C1_CLK__I2C1_CLK, I2C_PAD_CTRL),
+		NEW_PAD_CTRL(MX25_PAD_I2C1_DAT__I2C1_DAT, I2C_PAD_CTRL),
+	};
+
+	imx_iomux_v3_setup_multiple_pads(fec_pads, ARRAY_SIZE(fec_pads));
+
+	/* Assert RESET and ENABLE low */
+	gpio_direction_output(FEC_RESET_B, 0);
+	gpio_direction_output(FEC_ENABLE_B, 0);
+
+	udelay(10);
+
+	/* Deassert RESET and ENABLE */
+	gpio_set_value(FEC_RESET_B, 1);
+	gpio_set_value(FEC_ENABLE_B, 1);
+
+	/* Setup I2C pins so that PMIC can turn on PHY supply */
+	imx_iomux_v3_setup_multiple_pads(i2c_pads, ARRAY_SIZE(i2c_pads));
+}
+
+int dram_init(void)
+{
+	/* dram_init must store complete ramsize in gd->ram_size */
+	gd->ram_size = get_ram_size((void *)CONFIG_SYS_SDRAM_BASE,
+				PHYS_SDRAM_1_SIZE);
+	return 0;
+}
+
+/*
+ * Set up input pins with hysteresis and 100-k pull-ups
+ */
+#define UART1_IN_PAD_CTRL	(PAD_CTL_HYS | PAD_CTL_PUS_100K_UP)
+/*
+ * FIXME: need to revisit this
+ * The original code enabled PUE and 100-k pull-down without PKE, so the right
+ * value here is likely:
+ *	0 for no pull
+ * or:
+ *	PAD_CTL_PUS_100K_DOWN for 100-k pull-down
+ */
+#define UART1_OUT_PAD_CTRL	0
+
+static void mx25pdk_uart1_init(void)
+{
+	static const iomux_v3_cfg_t uart1_pads[] = {
+		NEW_PAD_CTRL(MX25_PAD_UART1_RXD__UART1_RXD, UART1_IN_PAD_CTRL),
+		NEW_PAD_CTRL(MX25_PAD_UART1_TXD__UART1_TXD, UART1_OUT_PAD_CTRL),
+		NEW_PAD_CTRL(MX25_PAD_UART1_RTS__UART1_RTS, UART1_OUT_PAD_CTRL),
+		NEW_PAD_CTRL(MX25_PAD_UART1_CTS__UART1_CTS, UART1_IN_PAD_CTRL),
+	};
+
+	imx_iomux_v3_setup_multiple_pads(uart1_pads, ARRAY_SIZE(uart1_pads));
+}
+
+int board_early_init_f(void)
+{
+	mx25pdk_uart1_init();
+
+	return 0;
+}
+
+int board_init(void)
+{
+	/* address of boot parameters */
+	gd->bd->bi_boot_params = PHYS_SDRAM_1 + 0x100;
+
+	return 0;
+}
+
+int board_late_init(void)
+{
+	struct pmic *p;
+	int ret;
+
+	mx25pdk_fec_init();
+
+	ret = pmic_init(I2C_0);
+	if (ret)
+		return ret;
+
+	p = pmic_get("FSL_PMIC");
+	if (!p)
+		return -ENODEV;
+
+	/* Turn on Ethernet PHY and LCD supplies */
+	pmic_reg_write(p, MC34704_GENERAL2_REG, ONOFFE | ONOFFA);
+
+	return 0;
+}
+
+#ifdef CONFIG_FSL_ESDHC
+int board_mmc_getcd(struct mmc *mmc)
+{
+	/* Set up the Card Detect pin. */
+	imx_iomux_v3_setup_pad(NEW_PAD_CTRL(MX25_PAD_A15__GPIO_2_1, 0));
+
+	gpio_direction_input(CARD_DETECT);
+	return !gpio_get_value(CARD_DETECT);
+}
+
+int board_mmc_init(bd_t *bis)
+{
+	static const iomux_v3_cfg_t sdhc1_pads[] = {
+		NEW_PAD_CTRL(MX25_PAD_SD1_CMD__SD1_CMD, NO_PAD_CTRL),
+		NEW_PAD_CTRL(MX25_PAD_SD1_CLK__SD1_CLK, NO_PAD_CTRL),
+		NEW_PAD_CTRL(MX25_PAD_SD1_DATA0__SD1_DATA0, NO_PAD_CTRL),
+		NEW_PAD_CTRL(MX25_PAD_SD1_DATA1__SD1_DATA1, NO_PAD_CTRL),
+		NEW_PAD_CTRL(MX25_PAD_SD1_DATA2__SD1_DATA2, NO_PAD_CTRL),
+		NEW_PAD_CTRL(MX25_PAD_SD1_DATA3__SD1_DATA3, NO_PAD_CTRL),
+	};
+
+	imx_iomux_v3_setup_multiple_pads(sdhc1_pads, ARRAY_SIZE(sdhc1_pads));
+
+	esdhc_cfg[0].sdhc_clk = mxc_get_clock(MXC_ESDHC1_CLK);
+	return fsl_esdhc_initialize(bis, &esdhc_cfg[0]);
+}
+#endif
+
+int checkboard(void)
+{
+	puts("Board: MX25PDK\n");
+
+	return 0;
+}
+
+/* Lowlevel init isn't used on mx25pdk, so just provide a dummy one here */
+void lowlevel_init(void) {}