ARM: atmel: add sama5d4ek board support

The code for this board supports following features:
  - Boot media support: NAND flash/SD card/SPI flash
  - Support LCD display
  - Support ethernet
  - Support USB mass storage

Signed-off-by: Bo Shen <voice.shen@atmel.com>
Signed-off-by: Andreas Bießmann <andreas.devel@googlemail.com>

Author: Bo Shen

arch/arm/Kconfig

@@ -509,6 +509,10 @@ config TARGET_SAMA5D3XEK
 	select CPU_V7
 	select SUPPORT_SPL
 
+config TARGET_SAMA5D4EK
+	bool "Support sama5d4ek"
+	select CPU_V7
+
 config TARGET_BCM28155_AP
 	bool "Support bcm28155_ap"
 	select CPU_V7
@@ -844,6 +848,7 @@ source "board/atmel/at91sam9rlek/Kconfig"
 source "board/atmel/at91sam9x5ek/Kconfig"
 source "board/atmel/sama5d3_xplained/Kconfig"
 source "board/atmel/sama5d3xek/Kconfig"
+source "board/atmel/sama5d4ek/Kconfig"
 source "board/bachmann/ot1200/Kconfig"
 source "board/balloon3/Kconfig"
 source "board/barco/titanium/Kconfig"

arch/arm/cpu/armv7/at91/Makefile

@@ -9,6 +9,7 @@
 #
 
 obj-$(CONFIG_SAMA5D3)	+= sama5d3_devices.o
+obj-$(CONFIG_SAMA5D4)	+= sama5d4_devices.o
 obj-y += clock.o
 obj-y += cpu.o
 obj-y += reset.o

arch/arm/cpu/armv7/at91/sama5d4_devices.c

@@ -0,0 +1,30 @@
+/*
+ * Copyright (C) 2014 Atmel
+ *		      Bo Shen <voice.shen@atmel.com>
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <common.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";
+}

arch/arm/cpu/armv7/at91/timer.c

@@ -65,7 +65,8 @@ int timer_init(void)
 	/* Enable PITC */
 	writel(TIMER_LOAD_VAL | AT91_PIT_MR_EN , &pit->mr);
 
-	gd->arch.timer_rate_hz = gd->arch.mck_rate_hz / 16;
+	gd->arch.timer_rate_hz = get_pit_clk_rate() / 16;
+
 	gd->arch.tbu = 0;
 	gd->arch.tbl = 0;
 

arch/arm/include/asm/arch-at91/at91_pmc.h

@@ -78,7 +78,7 @@ typedef struct at91_pmc {
 #define AT91_PMC_PLLXR_DIV(x)		(x & 0xFF)
 #define AT91_PMC_PLLXR_PLLCOUNT(x)	((x & 0x3F) << 8)
 #define AT91_PMC_PLLXR_OUT(x)		((x & 0x03) << 14)
-#ifdef CONFIG_SAMA5D3
+#if defined(CONFIG_SAMA5D3) || defined(CONFIG_SAMA5D4)
 #define AT91_PMC_PLLXR_MUL(x)		((x & 0x7F) << 18)
 #else
 #define AT91_PMC_PLLXR_MUL(x)		((x & 0x7FF) << 16)
@@ -97,7 +97,7 @@ typedef struct at91_pmc {
 #define AT91_PMC_MCKR_CSS_PLLB		0x00000003
 #define AT91_PMC_MCKR_CSS_MASK		0x00000003
 
-#ifdef CONFIG_SAMA5D3
+#if defined(CONFIG_SAMA5D3) || defined(CONFIG_SAMA5D4)
 #define AT91_PMC_MCKR_PRES_1		0x00000000
 #define AT91_PMC_MCKR_PRES_2		0x00000010
 #define AT91_PMC_MCKR_PRES_4		0x00000020
@@ -126,7 +126,7 @@ typedef struct at91_pmc {
 #else
 #define AT91_PMC_MCKR_MDIV_1		0x00000000
 #define AT91_PMC_MCKR_MDIV_2		0x00000100
-#ifdef CONFIG_SAMA5D3
+#if defined(CONFIG_SAMA5D3) || defined(CONFIG_SAMA5D4)
 #define AT91_PMC_MCKR_MDIV_3		0x00000300
 #endif
 #define AT91_PMC_MCKR_MDIV_4		0x00000200
@@ -137,6 +137,8 @@ typedef struct at91_pmc {
 #define AT91_PMC_MCKR_PLLADIV_1		0x00000000
 #define AT91_PMC_MCKR_PLLADIV_2		0x00001000
 
+#define AT91_PMC_MCKR_H32MXDIV		0x01000000
+
 #define AT91_PMC_IXR_MOSCS		0x00000001
 #define AT91_PMC_IXR_LOCKA		0x00000002
 #define AT91_PMC_IXR_LOCKB		0x00000004

arch/arm/include/asm/arch-at91/clk.h

@@ -10,6 +10,7 @@
 #define __ASM_ARM_ARCH_CLK_H__
 
 #include <asm/arch/hardware.h>
+#include <asm/arch/at91_pmc.h>
 #include <asm/global_data.h>
 
 static inline unsigned long get_cpu_clk_rate(void)
@@ -48,14 +49,34 @@ static inline u32 get_pllb_init(void)
 	return gd->arch.at91_pllb_usb_init;
 }
 
+#ifdef CPU_HAS_H32MXDIV
+static inline unsigned int get_h32mxdiv(void)
+{
+	struct at91_pmc *pmc = (struct at91_pmc *)ATMEL_BASE_PMC;
+
+	return readl(&pmc->mckr) & AT91_PMC_MCKR_H32MXDIV;
+}
+#else
+static inline unsigned int get_h32mxdiv(void)
+{
+	return 0;
+}
+#endif
+
 static inline unsigned long get_macb_pclk_rate(unsigned int dev_id)
 {
-	return get_mck_clk_rate();
+	if (get_h32mxdiv())
+		return get_mck_clk_rate() / 2;
+	else
+		return get_mck_clk_rate();
 }
 
 static inline unsigned long get_usart_clk_rate(unsigned int dev_id)
 {
-	return get_mck_clk_rate();
+	if (get_h32mxdiv())
+		return get_mck_clk_rate() / 2;
+	else
+		return get_mck_clk_rate();
 }
 
 static inline unsigned long get_lcdc_clk_rate(unsigned int dev_id)
@@ -65,17 +86,34 @@ static inline unsigned long get_lcdc_clk_rate(unsigned int dev_id)
 
 static inline unsigned long get_spi_clk_rate(unsigned int dev_id)
 {
-	return get_mck_clk_rate();
+	if (get_h32mxdiv())
+		return get_mck_clk_rate() / 2;
+	else
+		return get_mck_clk_rate();
 }
 
 static inline unsigned long get_twi_clk_rate(unsigned int dev_id)
 {
-	return get_mck_clk_rate();
+	if (get_h32mxdiv())
+		return get_mck_clk_rate() / 2;
+	else
+		return get_mck_clk_rate();
 }
 
 static inline unsigned long get_mci_clk_rate(void)
 {
-	return get_mck_clk_rate();
+	if (get_h32mxdiv())
+		return get_mck_clk_rate() / 2;
+	else
+		return get_mck_clk_rate();
+}
+
+static inline unsigned long get_pit_clk_rate(void)
+{
+	if (get_h32mxdiv())
+		return get_mck_clk_rate() / 2;
+	else
+		return get_mck_clk_rate();
 }
 
 int at91_clock_init(unsigned long main_clock);

arch/arm/include/asm/arch-at91/hardware.h

@@ -27,6 +27,8 @@
 # include <asm/arch/at91cap9.h>
 #elif defined(CONFIG_SAMA5D3)
 # include <asm/arch/sama5d3.h>
+#elif defined(CONFIG_SAMA5D4)
+# include <asm/arch/sama5d4.h>
 #else
 # error "Unsupported AT91 processor"
 #endif