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/arch/arm/mach-at91/armv7/Makefile

@@ -0,0 +1,17 @@
+#
+# (C) Copyright 2000-2008
+# Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+#
+# (C) Copyright 2013
+# Bo Shen <voice.shen@atmel.com>
+#
+# SPDX-License-Identifier:	GPL-2.0+
+#
+
+obj-$(CONFIG_SAMA5D2)	+= sama5d2_devices.o
+obj-$(CONFIG_SAMA5D3)	+= sama5d3_devices.o
+obj-$(CONFIG_SAMA5D4)	+= sama5d4_devices.o
+obj-y += clock.o
+obj-y += cpu.o
+obj-y += reset.o
+obj-y += timer.o

u-boot/arch/arm/mach-at91/armv7/clock.c

@@ -0,0 +1,255 @@
+/*
+ * [origin: Linux kernel linux/arch/arm/mach-at91/clock.c]
+ *
+ * Copyright (C) 2005 David Brownell
+ * Copyright (C) 2005 Ivan Kokshaysky
+ * Copyright (C) 2009 Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
+ * Copyright (C) 2013 Bo Shen <voice.shen@atmel.com>
+ * Copyright (C) 2015 Wenyou Yang <wenyou.yang@atmel.com>
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <common.h>
+#include <asm/errno.h>
+#include <asm/io.h>
+#include <asm/arch/hardware.h>
+#include <asm/arch/at91_pmc.h>
+#include <asm/arch/clk.h>
+
+#if !defined(CONFIG_AT91FAMILY)
+# error You need to define CONFIG_AT91FAMILY in your board config!
+#endif
+
+DECLARE_GLOBAL_DATA_PTR;
+
+static unsigned long at91_css_to_rate(unsigned long css)
+{
+	switch (css) {
+	case AT91_PMC_MCKR_CSS_SLOW:
+		return CONFIG_SYS_AT91_SLOW_CLOCK;
+	case AT91_PMC_MCKR_CSS_MAIN:
+		return gd->arch.main_clk_rate_hz;
+	case AT91_PMC_MCKR_CSS_PLLA:
+		return gd->arch.plla_rate_hz;
+	}
+
+	return 0;
+}
+
+static u32 at91_pll_rate(u32 freq, u32 reg)
+{
+	unsigned mul, div;
+
+	div = reg & 0xff;
+	mul = (reg >> 18) & 0x7f;
+	if (div && mul) {
+		freq /= div;
+		freq *= mul + 1;
+	} else {
+		freq = 0;
+	}
+
+	return freq;
+}
+
+int at91_clock_init(unsigned long main_clock)
+{
+	unsigned freq, mckr;
+	struct at91_pmc *pmc = (struct at91_pmc *)ATMEL_BASE_PMC;
+#ifndef CONFIG_SYS_AT91_MAIN_CLOCK
+	unsigned tmp;
+	/*
+	 * When the bootloader initialized the main oscillator correctly,
+	 * there's no problem using the cycle counter.  But if it didn't,
+	 * or when using oscillator bypass mode, we must be told the speed
+	 * of the main clock.
+	 */
+	if (!main_clock) {
+		do {
+			tmp = readl(&pmc->mcfr);
+		} while (!(tmp & AT91_PMC_MCFR_MAINRDY));
+		tmp &= AT91_PMC_MCFR_MAINF_MASK;
+		main_clock = tmp * (CONFIG_SYS_AT91_SLOW_CLOCK / 16);
+	}
+#endif
+	gd->arch.main_clk_rate_hz = main_clock;
+
+	/* report if PLLA is more than mildly overclocked */
+	gd->arch.plla_rate_hz = at91_pll_rate(main_clock, readl(&pmc->pllar));
+
+	/*
+	 * MCK and CPU derive from one of those primary clocks.
+	 * For now, assume this parentage won't change.
+	 */
+	mckr = readl(&pmc->mckr);
+
+	/* plla divisor by 2 */
+	if (mckr & (1 << 12))
+		gd->arch.plla_rate_hz >>= 1;
+
+	gd->arch.mck_rate_hz = at91_css_to_rate(mckr & AT91_PMC_MCKR_CSS_MASK);
+	freq = gd->arch.mck_rate_hz;
+
+	/* prescale */
+	freq >>= mckr & AT91_PMC_MCKR_PRES_MASK;
+
+	switch (mckr & AT91_PMC_MCKR_MDIV_MASK) {
+	case AT91_PMC_MCKR_MDIV_2:
+		gd->arch.mck_rate_hz = freq / 2;
+		break;
+	case AT91_PMC_MCKR_MDIV_3:
+		gd->arch.mck_rate_hz = freq / 3;
+		break;
+	case AT91_PMC_MCKR_MDIV_4:
+		gd->arch.mck_rate_hz = freq / 4;
+		break;
+	default:
+		break;
+	}
+
+	gd->arch.cpu_clk_rate_hz = freq;
+
+	return 0;
+}
+
+void at91_plla_init(u32 pllar)
+{
+	struct at91_pmc *pmc = (struct at91_pmc *)ATMEL_BASE_PMC;
+
+	writel(pllar, &pmc->pllar);
+	while (!(readl(&pmc->sr) & (AT91_PMC_LOCKA | AT91_PMC_MCKRDY)))
+		;
+}
+
+void at91_mck_init(u32 mckr)
+{
+	struct at91_pmc *pmc = (struct at91_pmc *)ATMEL_BASE_PMC;
+	u32 tmp;
+
+	tmp = readl(&pmc->mckr);
+	tmp &= ~(AT91_PMC_MCKR_CSS_MASK  |
+		 AT91_PMC_MCKR_PRES_MASK |
+		 AT91_PMC_MCKR_MDIV_MASK |
+		 AT91_PMC_MCKR_PLLADIV_2);
+#ifdef CPU_HAS_H32MXDIV
+	tmp &= ~AT91_PMC_MCKR_H32MXDIV;
+#endif
+
+	tmp |= mckr & (AT91_PMC_MCKR_CSS_MASK  |
+		       AT91_PMC_MCKR_PRES_MASK |
+		       AT91_PMC_MCKR_MDIV_MASK |
+		       AT91_PMC_MCKR_PLLADIV_2);
+#ifdef CPU_HAS_H32MXDIV
+	tmp |= mckr & AT91_PMC_MCKR_H32MXDIV;
+#endif
+
+	writel(tmp, &pmc->mckr);
+
+	while (!(readl(&pmc->sr) & AT91_PMC_MCKRDY))
+		;
+}
+
+int at91_enable_periph_generated_clk(u32 id, u32 clk_source, u32 div)
+{
+	struct at91_pmc *pmc = (struct at91_pmc *)ATMEL_BASE_PMC;
+	u32 regval, status;
+	u32 timeout = 1000;
+
+	if (id > AT91_PMC_PCR_PID_MASK)
+		return -EINVAL;
+
+	if (div > 0xff)
+		return -EINVAL;
+
+	if (clk_source == GCK_CSS_UPLL_CLK) {
+		if (at91_upll_clk_enable())
+			return -ENODEV;
+	}
+
+	writel(id, &pmc->pcr);
+	regval = readl(&pmc->pcr);
+	regval &= ~AT91_PMC_PCR_GCKCSS;
+	regval &= ~AT91_PMC_PCR_GCKDIV;
+
+	switch (clk_source) {
+	case GCK_CSS_SLOW_CLK:
+		regval |= AT91_PMC_PCR_GCKCSS_SLOW_CLK;
+		break;
+	case GCK_CSS_MAIN_CLK:
+		regval |= AT91_PMC_PCR_GCKCSS_MAIN_CLK;
+		break;
+	case GCK_CSS_PLLA_CLK:
+		regval |= AT91_PMC_PCR_GCKCSS_PLLA_CLK;
+		break;
+	case GCK_CSS_UPLL_CLK:
+		regval |= AT91_PMC_PCR_GCKCSS_UPLL_CLK;
+		break;
+	case GCK_CSS_MCK_CLK:
+		regval |= AT91_PMC_PCR_GCKCSS_MCK_CLK;
+		break;
+	case GCK_CSS_AUDIO_CLK:
+		regval |= AT91_PMC_PCR_GCKCSS_AUDIO_CLK;
+		break;
+	default:
+		printf("Error GCK clock source selection!\n");
+		return -EINVAL;
+	}
+
+	regval |= AT91_PMC_PCR_CMD_WRITE |
+		  AT91_PMC_PCR_GCKDIV_(div) |
+		  AT91_PMC_PCR_GCKEN;
+
+	writel(regval, &pmc->pcr);
+
+	do {
+		udelay(1);
+		status = readl(&pmc->sr);
+	} while ((!!(--timeout)) && (!(status & AT91_PMC_GCKRDY)));
+
+	if (!timeout)
+		printf("Timeout waiting for GCK ready!\n");
+
+	return 0;
+}
+
+u32 at91_get_periph_generated_clk(u32 id)
+{
+	struct at91_pmc *pmc = (struct at91_pmc *)ATMEL_BASE_PMC;
+	u32 regval, clk_source, div;
+	u32 freq;
+
+	if (id > AT91_PMC_PCR_PID_MASK)
+		return 0;
+
+	writel(id, &pmc->pcr);
+	regval = readl(&pmc->pcr);
+
+	clk_source = regval & AT91_PMC_PCR_GCKCSS;
+	switch (clk_source) {
+	case AT91_PMC_PCR_GCKCSS_SLOW_CLK:
+		freq = CONFIG_SYS_AT91_SLOW_CLOCK;
+		break;
+	case AT91_PMC_PCR_GCKCSS_MAIN_CLK:
+		freq = gd->arch.main_clk_rate_hz;
+		break;
+	case AT91_PMC_PCR_GCKCSS_PLLA_CLK:
+		freq = gd->arch.plla_rate_hz;
+		break;
+	case AT91_PMC_PCR_GCKCSS_UPLL_CLK:
+		freq = AT91_UTMI_PLL_CLK_FREQ;
+		break;
+	case AT91_PMC_PCR_GCKCSS_MCK_CLK:
+		freq = gd->arch.mck_rate_hz;
+		break;
+	default:
+		printf("Improper GCK clock source selection!\n");
+		freq = 0;
+		break;
+	}
+
+	div = ((regval & AT91_PMC_PCR_GCKDIV) >> AT91_PMC_PCR_GCKDIV_OFFSET);
+	div += 1;
+
+	return freq / div;
+}

u-boot/arch/arm/mach-at91/armv7/cpu.c

@@ -0,0 +1,76 @@
+/*
+ * (C) Copyright 2010
+ * Reinhard Meyer, reinhard.meyer@emk-elektronik.de
+ * (C) Copyright 2009
+ * Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
+ * (C) Copyright 2013
+ * Bo Shen <voice.shen@atmel.com>
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <common.h>
+#include <asm/io.h>
+#include <asm/arch/hardware.h>
+#include <asm/arch/at91_pit.h>
+#include <asm/arch/at91_gpbr.h>
+#include <asm/arch/clk.h>
+
+#ifndef CONFIG_SYS_AT91_MAIN_CLOCK
+#define CONFIG_SYS_AT91_MAIN_CLOCK 0
+#endif
+
+int arch_cpu_init(void)
+{
+	return at91_clock_init(CONFIG_SYS_AT91_MAIN_CLOCK);
+}
+
+void arch_preboot_os(void)
+{
+	ulong cpiv;
+	at91_pit_t *pit = (at91_pit_t *)ATMEL_BASE_PIT;
+
+	cpiv = AT91_PIT_MR_PIV_MASK(readl(&pit->piir));
+
+	/*
+	 * Disable PITC
+	 * Add 0x1000 to current counter to stop it faster
+	 * without waiting for wrapping back to 0
+	 */
+	writel(cpiv + 0x1000, &pit->mr);
+}
+
+#if defined(CONFIG_DISPLAY_CPUINFO)
+int print_cpuinfo(void)
+{
+	char buf[32];
+
+	printf("CPU: %s\n", get_cpu_name());
+	printf("Crystal frequency: %8s MHz\n",
+	       strmhz(buf, get_main_clk_rate()));
+	printf("CPU clock        : %8s MHz\n",
+	       strmhz(buf, get_cpu_clk_rate()));
+	printf("Master clock     : %8s MHz\n",
+	       strmhz(buf, get_mck_clk_rate()));
+
+	return 0;
+}
+#endif
+
+void enable_caches(void)
+{
+	icache_enable();
+	dcache_enable();
+}
+
+#define ATMEL_CHIPID_CIDR_VERSION	0x1f
+
+unsigned int get_chip_id(void)
+{
+	return readl(ATMEL_CHIPID_CIDR) & ~ATMEL_CHIPID_CIDR_VERSION;
+}
+
+unsigned int get_extension_chip_id(void)
+{
+	return readl(ATMEL_CHIPID_EXID);
+}

u-boot/arch/arm/mach-at91/armv7/reset.c

@@ -0,0 +1,31 @@
+/*
+ * (C) Copyright 2007-2008
+ * Stelian Pop <stelian@popies.net>
+ * Lead Tech Design <www.leadtechdesign.com>
+ *
+ * (C) Copyright 2013
+ * Bo Shen <voice.shen@atmel.com>
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <common.h>
+#include <asm/io.h>
+#include <asm/arch/hardware.h>
+#include <asm/arch/at91_rstc.h>
+
+/* Reset the cpu by telling the reset controller to do so */
+void reset_cpu(ulong ignored)
+{
+	at91_rstc_t *rstc = (at91_rstc_t *)ATMEL_BASE_RSTC;
+
+	writel(AT91_RSTC_KEY
+		| AT91_RSTC_CR_PROCRST	/* Processor Reset */
+		| AT91_RSTC_CR_PERRST	/* Peripheral Reset */
+#ifdef CONFIG_AT91RESET_EXTRST
+		| AT91_RSTC_CR_EXTRST	/* External Reset (assert nRST pin) */
+#endif
+		, &rstc->cr);
+	/* never reached */
+	do { } while (1);
+}

u-boot/arch/arm/mach-at91/armv7/sama5d2_devices.c

@@ -0,0 +1,54 @@
+/*
+ * Copyright (C) 2015 Atmel Corporation
+ *		      Wenyou Yang <wenyou.yang@atmel.com>
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <common.h>
+#include <asm/io.h>
+#include <asm/arch/clk.h>
+#include <asm/arch/sama5d2.h>
+
+char *get_cpu_name()
+{
+	unsigned int extension_id = get_extension_chip_id();
+
+	if (cpu_is_sama5d2()) {
+		switch (extension_id) {
+		case ARCH_EXID_SAMA5D21CU:
+			return "SAMA5D21";
+		case ARCH_EXID_SAMA5D22CU:
+			return "SAMA5D22-CU";
+		case ARCH_EXID_SAMA5D22CN:
+			return "SAMA5D22-CN";
+		case ARCH_EXID_SAMA5D23CU:
+			return "SAMA5D23-CU";
+		case ARCH_EXID_SAMA5D24CX:
+			return "SAMA5D24-CX";
+		case ARCH_EXID_SAMA5D24CU:
+			return "SAMA5D24-CU";
+		case ARCH_EXID_SAMA5D26CU:
+			return "SAMA5D26-CU";
+		case ARCH_EXID_SAMA5D27CU:
+			return "SAMA5D27-CU";
+		case ARCH_EXID_SAMA5D27CN:
+			return "SAMA5D27-CN";
+		case ARCH_EXID_SAMA5D28CU:
+			return "SAMA5D28-CU";
+		case ARCH_EXID_SAMA5D28CN:
+			return "SAMA5D28-CN";
+		}
+	}
+
+	return "Unknown CPU type";
+}
+
+#ifdef CONFIG_USB_GADGET_ATMEL_USBA
+void at91_udp_hw_init(void)
+{
+	at91_upll_clk_enable();
+
+	at91_periph_clk_enable(ATMEL_ID_UDPHS);
+}
+#endif

u-boot/arch/arm/mach-at91/armv7/sama5d3_devices.c

@@ -0,0 +1,215 @@
+/*
+ * Copyright (C) 2012-2013 Atmel Corporation
+ * Bo Shen <voice.shen@atmel.com>
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <common.h>
+#include <asm/arch/sama5d3.h>
+#include <asm/arch/at91_common.h>
+#include <asm/arch/clk.h>
+#include <asm/arch/gpio.h>
+#include <asm/io.h>
+
+unsigned int has_emac()
+{
+	return cpu_is_sama5d31() || cpu_is_sama5d35() || cpu_is_sama5d36();
+}
+
+unsigned int has_gmac()
+{
+	return !cpu_is_sama5d31();
+}
+
+unsigned int has_lcdc()
+{
+	return !cpu_is_sama5d35();
+}
+
+char *get_cpu_name()
+{
+	unsigned int extension_id = get_extension_chip_id();
+
+	if (cpu_is_sama5d3())
+		switch (extension_id) {
+		case ARCH_EXID_SAMA5D31:
+			return "SAMA5D31";
+		case ARCH_EXID_SAMA5D33:
+			return "SAMA5D33";
+		case ARCH_EXID_SAMA5D34:
+			return "SAMA5D34";
+		case ARCH_EXID_SAMA5D35:
+			return "SAMA5D35";
+		case ARCH_EXID_SAMA5D36:
+			return "SAMA5D36";
+		default:
+			return "Unknown CPU type";
+		}
+	else
+		return "Unknown CPU type";
+}
+
+void at91_serial0_hw_init(void)
+{
+	at91_set_a_periph(AT91_PIO_PORTD, 18, 1);	/* TXD0 */
+	at91_set_a_periph(AT91_PIO_PORTD, 17, 0);	/* RXD0 */
+
+	/* Enable clock */
+	at91_periph_clk_enable(ATMEL_ID_USART0);
+}
+
+void at91_serial1_hw_init(void)
+{
+	at91_set_a_periph(AT91_PIO_PORTB, 29, 1);	/* TXD1 */
+	at91_set_a_periph(AT91_PIO_PORTB, 28, 0);	/* RXD1 */
+
+	/* Enable clock */
+	at91_periph_clk_enable(ATMEL_ID_USART1);
+}
+
+void at91_serial2_hw_init(void)
+{
+	at91_set_b_periph(AT91_PIO_PORTE, 26, 1);	/* TXD2 */
+	at91_set_b_periph(AT91_PIO_PORTE, 25, 0);	/* RXD2 */
+
+	/* Enable clock */
+	at91_periph_clk_enable(ATMEL_ID_USART2);
+}
+
+void at91_seriald_hw_init(void)
+{
+	at91_set_a_periph(AT91_PIO_PORTB, 31, 1);	/* DTXD */
+	at91_set_a_periph(AT91_PIO_PORTB, 30, 0);	/* DRXD */
+
+	/* Enable clock */
+	at91_periph_clk_enable(ATMEL_ID_DBGU);
+}
+
+#if defined(CONFIG_ATMEL_SPI)
+void at91_spi0_hw_init(unsigned long cs_mask)
+{
+	at91_set_a_periph(AT91_PIO_PORTD, 10, 0);       /* SPI0_MISO */
+	at91_set_a_periph(AT91_PIO_PORTD, 11, 0);       /* SPI0_MOSI */
+	at91_set_a_periph(AT91_PIO_PORTD, 12, 0);       /* SPI0_SPCK */
+
+	if (cs_mask & (1 << 0))
+		at91_set_pio_output(AT91_PIO_PORTD, 13, 1);
+	if (cs_mask & (1 << 1))
+		at91_set_pio_output(AT91_PIO_PORTD, 14, 1);
+	if (cs_mask & (1 << 2))
+		at91_set_pio_output(AT91_PIO_PORTD, 15, 1);
+	if (cs_mask & (1 << 3))
+		at91_set_pio_output(AT91_PIO_PORTD, 16, 1);
+
+	/* Enable clock */
+	at91_periph_clk_enable(ATMEL_ID_SPI0);
+}
+#endif
+
+#ifdef CONFIG_GENERIC_ATMEL_MCI
+void at91_mci_hw_init(void)
+{
+	at91_set_a_periph(AT91_PIO_PORTD, 0, 0);	/* MCI0 CMD */
+	at91_set_a_periph(AT91_PIO_PORTD, 1, 0);	/* MCI0 DA0 */
+	at91_set_a_periph(AT91_PIO_PORTD, 2, 0);	/* MCI0 DA1 */
+	at91_set_a_periph(AT91_PIO_PORTD, 3, 0);        /* MCI0 DA2 */
+	at91_set_a_periph(AT91_PIO_PORTD, 4, 0);        /* MCI0 DA3 */
+#ifdef CONFIG_ATMEL_MCI_8BIT
+	at91_set_a_periph(AT91_PIO_PORTD, 5, 0);        /* MCI0 DA4 */
+	at91_set_a_periph(AT91_PIO_PORTD, 6, 0);        /* MCI0 DA5 */
+	at91_set_a_periph(AT91_PIO_PORTD, 7, 0);        /* MCI0 DA6 */
+	at91_set_a_periph(AT91_PIO_PORTD, 8, 0);        /* MCI0 DA7 */
+#endif
+	at91_set_a_periph(AT91_PIO_PORTD, 9, 0);        /* MCI0 CLK */
+
+	/* Enable clock */
+	at91_periph_clk_enable(ATMEL_ID_MCI0);
+}
+#endif
+
+#ifdef CONFIG_MACB
+void at91_macb_hw_init(void)
+{
+	at91_set_a_periph(AT91_PIO_PORTC, 7, 0);	/* ETXCK_EREFCK */
+	at91_set_a_periph(AT91_PIO_PORTC, 5, 0);	/* ERXDV */
+	at91_set_a_periph(AT91_PIO_PORTC, 2, 0);	/* ERX0 */
+	at91_set_a_periph(AT91_PIO_PORTC, 3, 0);	/* ERX1 */
+	at91_set_a_periph(AT91_PIO_PORTC, 6, 0);	/* ERXER */
+	at91_set_a_periph(AT91_PIO_PORTC, 4, 0);	/* ETXEN */
+	at91_set_a_periph(AT91_PIO_PORTC, 0, 0);	/* ETX0 */
+	at91_set_a_periph(AT91_PIO_PORTC, 1, 0);	/* ETX1 */
+	at91_set_a_periph(AT91_PIO_PORTC, 9, 0);	/* EMDIO */
+	at91_set_a_periph(AT91_PIO_PORTC, 8, 0);	/* EMDC */
+
+	/* Enable clock */
+	at91_periph_clk_enable(ATMEL_ID_EMAC);
+}
+
+void at91_gmac_hw_init(void)
+{
+	at91_set_a_periph(AT91_PIO_PORTB, 0, 0);	/* GTX0 */
+	at91_set_a_periph(AT91_PIO_PORTB, 1, 0);	/* GTX1 */
+	at91_set_a_periph(AT91_PIO_PORTB, 2, 0);	/* GTX2 */
+	at91_set_a_periph(AT91_PIO_PORTB, 3, 0);	/* GTX3 */
+	at91_set_a_periph(AT91_PIO_PORTB, 4, 0);	/* GRX0 */
+	at91_set_a_periph(AT91_PIO_PORTB, 5, 0);	/* GRX1 */
+	at91_set_a_periph(AT91_PIO_PORTB, 6, 0);	/* GRX2 */
+	at91_set_a_periph(AT91_PIO_PORTB, 7, 0);	/* GRX3 */
+	at91_set_a_periph(AT91_PIO_PORTB, 8, 0);	/* GTXCK */
+	at91_set_a_periph(AT91_PIO_PORTB, 9, 0);	/* GTXEN */
+
+	at91_set_a_periph(AT91_PIO_PORTB, 11, 0);	/* GRXCK */
+	at91_set_a_periph(AT91_PIO_PORTB, 13, 0);	/* GRXER */
+
+	at91_set_a_periph(AT91_PIO_PORTB, 16, 0);	/* GMDC */
+	at91_set_a_periph(AT91_PIO_PORTB, 17, 0);	/* GMDIO */
+	at91_set_a_periph(AT91_PIO_PORTB, 18, 0);	/* G125CK */
+
+	/* Enable clock */
+	at91_periph_clk_enable(ATMEL_ID_GMAC);
+}
+#endif
+
+#ifdef CONFIG_LCD
+void at91_lcd_hw_init(void)
+{
+	at91_set_a_periph(AT91_PIO_PORTA, 24, 0);	/* LCDPWM */
+	at91_set_a_periph(AT91_PIO_PORTA, 25, 0);	/* LCDDISP */
+	at91_set_a_periph(AT91_PIO_PORTA, 26, 0);	/* LCDVSYNC */
+	at91_set_a_periph(AT91_PIO_PORTA, 27, 0);	/* LCDHSYNC */
+	at91_set_a_periph(AT91_PIO_PORTA, 28, 0);	/* LCDDOTCK */
+	at91_set_a_periph(AT91_PIO_PORTA, 29, 0);	/* LCDDEN */
+
+	/* The lower 16-bit of LCD only available on Port A */
+	at91_set_a_periph(AT91_PIO_PORTA,  0, 0);	/* LCDD0 */
+	at91_set_a_periph(AT91_PIO_PORTA,  1, 0);	/* LCDD1 */
+	at91_set_a_periph(AT91_PIO_PORTA,  2, 0);	/* LCDD2 */
+	at91_set_a_periph(AT91_PIO_PORTA,  3, 0);	/* LCDD3 */
+	at91_set_a_periph(AT91_PIO_PORTA,  4, 0);	/* LCDD4 */
+	at91_set_a_periph(AT91_PIO_PORTA,  5, 0);	/* LCDD5 */
+	at91_set_a_periph(AT91_PIO_PORTA,  6, 0);	/* LCDD6 */
+	at91_set_a_periph(AT91_PIO_PORTA,  7, 0);	/* LCDD7 */
+	at91_set_a_periph(AT91_PIO_PORTA,  8, 0);	/* LCDD8 */
+	at91_set_a_periph(AT91_PIO_PORTA,  9, 0);	/* LCDD9 */
+	at91_set_a_periph(AT91_PIO_PORTA, 10, 0);	/* LCDD10 */
+	at91_set_a_periph(AT91_PIO_PORTA, 11, 0);	/* LCDD11 */
+	at91_set_a_periph(AT91_PIO_PORTA, 12, 0);	/* LCDD12 */
+	at91_set_a_periph(AT91_PIO_PORTA, 13, 0);	/* LCDD13 */
+	at91_set_a_periph(AT91_PIO_PORTA, 14, 0);	/* LCDD14 */
+	at91_set_a_periph(AT91_PIO_PORTA, 15, 0);	/* LCDD15 */
+
+	/* Enable clock */
+	at91_periph_clk_enable(ATMEL_ID_LCDC);
+}
+#endif
+
+#ifdef CONFIG_USB_GADGET_ATMEL_USBA
+void at91_udp_hw_init(void)
+{
+	/* Enable UPLL clock */
+	at91_upll_clk_enable();
+	/* Enable UDPHS clock */
+	at91_periph_clk_enable(ATMEL_ID_UDPHS);
+}
+#endif

u-boot/arch/arm/mach-at91/armv7/sama5d4_devices.c

@@ -0,0 +1,44 @@
+/*
+ * Copyright (C) 2014 Atmel
+ *		      Bo Shen <voice.shen@atmel.com>
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <common.h>
+#include <asm/io.h>
+#include <asm/arch/at91_common.h>
+#include <asm/arch/clk.h>
+#include <asm/arch/sama5_sfr.h>
+#include <asm/arch/sama5d4.h>
+
+char *get_cpu_name()
+{
+	unsigned int extension_id = get_extension_chip_id();
+
+	if (cpu_is_sama5d4())
+		switch (extension_id) {
+		case ARCH_EXID_SAMA5D41:
+			return "SAMA5D41";
+		case ARCH_EXID_SAMA5D42:
+			return "SAMA5D42";
+		case ARCH_EXID_SAMA5D43:
+			return "SAMA5D43";
+		case ARCH_EXID_SAMA5D44:
+			return "SAMA5D44";
+		default:
+			return "Unknown CPU type";
+		}
+	else
+		return "Unknown CPU type";
+}
+
+#ifdef CONFIG_USB_GADGET_ATMEL_USBA
+void at91_udp_hw_init(void)
+{
+	/* Enable UPLL clock */
+	at91_upll_clk_enable();
+	/* Enable UDPHS clock */
+	at91_periph_clk_enable(ATMEL_ID_UDPHS);
+}
+#endif

u-boot/arch/arm/mach-at91/armv7/timer.c

@@ -0,0 +1,62 @@
+/*
+ * (C) Copyright 2007-2008
+ * Stelian Pop <stelian@popies.net>
+ * Lead Tech Design <www.leadtechdesign.com>
+ *
+ * (C) Copyright 2013
+ * Bo Shen <voice.shen@atmel.com>
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <common.h>
+#include <asm/io.h>
+#include <asm/arch/hardware.h>
+#include <asm/arch/at91_pit.h>
+#include <asm/arch/clk.h>
+#include <div64.h>
+
+#if !defined(CONFIG_AT91FAMILY)
+# error You need to define CONFIG_AT91FAMILY in your board config!
+#endif
+
+DECLARE_GLOBAL_DATA_PTR;
+
+/*
+ * We're using the SAMA5D3x PITC in 32 bit mode, by
+ * setting the 20 bit counter period to its maximum (0xfffff).
+ * (See the relevant data sheets to understand that this really works)
+ *
+ * We do also mimic the typical powerpc way of incrementing
+ * two 32 bit registers called tbl and tbu.
+ *
+ * Those registers increment at 1/16 the main clock rate.
+ */
+
+#define TIMER_LOAD_VAL	0xfffff
+
+/*
+ * Use the PITC in full 32 bit incrementing mode
+ */
+int timer_init(void)
+{
+	at91_pit_t *pit = (at91_pit_t *)ATMEL_BASE_PIT;
+
+	/* Enable PITC Clock */
+	at91_periph_clk_enable(ATMEL_ID_PIT);
+
+	/* Enable PITC */
+	writel(TIMER_LOAD_VAL | AT91_PIT_MR_EN , &pit->mr);
+
+	gd->arch.timer_rate_hz = get_pit_clk_rate() / 16;
+
+	return 0;
+}
+
+/*
+ * Return the number of timer ticks per second.
+ */
+ulong get_tbclk(void)
+{
+	return gd->arch.timer_rate_hz;
+}

u-boot/arch/arm/mach-at91/armv7/u-boot-spl.lds

@@ -0,0 +1,58 @@
+/*
+ * (C) Copyright 2002
+ * Gary Jennejohn, DENX Software Engineering, <garyj@denx.de>
+ *
+ * (C) Copyright 2010
+ * Texas Instruments, <www.ti.com>
+ *	Aneesh V <aneesh@ti.com>
+ *
+ * (C) 2013 Atmel Corporation
+ *	    Bo Shen <voice.shen@atmel.com>
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+MEMORY { .sram : ORIGIN = CONFIG_SPL_TEXT_BASE, \
+		LENGTH = CONFIG_SPL_MAX_SIZE }
+MEMORY { .sdram : ORIGIN = CONFIG_SPL_BSS_START_ADDR, \
+		LENGTH = CONFIG_SPL_BSS_MAX_SIZE }
+
+OUTPUT_FORMAT("elf32-littlearm", "elf32-littlearm", "elf32-littlearm")
+OUTPUT_ARCH(arm)
+ENTRY(_start)
+SECTIONS
+{
+	.text      :
+	{
+		__start = .;
+		*(.vectors)
+		arch/arm/cpu/armv7/start.o	(.text*)
+		*(.text*)
+	} >.sram
+
+	. = ALIGN(4);
+	.rodata : { *(SORT_BY_ALIGNMENT(.rodata*)) } >.sram
+
+	. = ALIGN(4);
+	.data : { *(SORT_BY_ALIGNMENT(.data*)) } >.sram
+
+	. = ALIGN(4);
+	.u_boot_list : { KEEP(*(SORT(.u_boot_list*))) } > .sram
+
+	. = ALIGN(4);
+	__image_copy_end = .;
+
+	.end :
+	{
+		*(.__end)
+	} >.sram
+
+	.bss :
+	{
+		. = ALIGN(4);
+		__bss_start = .;
+		*(.bss*)
+		. = ALIGN(4);
+		__bss_end = .;
+	} >.sdram
+}