mxc: Add support for the Babbage board (i.MX5)

Babbage is a reference board from Freescale for their i.MX51 SoC.

Add board definition, Kconfig and Makefiles to enable Freescale i.MX51
processor and Babbage board.

Boot tested on a Babbage2.5 board

Signed-off-by: Amit Kucheria <amit.kucheria@canonical.com>

arch/arm/Makefile

@@ -146,6 +146,7 @@ machine-$(CONFIG_ARCH_MX1)		:= mx1
 machine-$(CONFIG_ARCH_MX2)		:= mx2
 machine-$(CONFIG_ARCH_MX25)		:= mx25
 machine-$(CONFIG_ARCH_MX3)		:= mx3
+machine-$(CONFIG_ARCH_MX5)		:= mx5
 machine-$(CONFIG_ARCH_NETX)		:= netx
 machine-$(CONFIG_ARCH_NOMADIK)		:= nomadik
 machine-$(CONFIG_ARCH_NS9XXX)		:= ns9xxx

arch/arm/mach-mx5/Kconfig

@@ -0,0 +1,18 @@
+if ARCH_MX5
+
+config ARCH_MX51
+	bool
+	default y
+	select MXC_TZIC
+	select ARCH_MXC_IOMUX_V3
+
+comment "MX5 platforms:"
+
+config MACH_MX51_BABBAGE
+	bool "Support MX51 BABBAGE platforms"
+	help
+	  Include support for MX51 Babbage platform, also known as MX51EVK in
+	  u-boot. This includes specific configurations for the board and its
+	  peripherals.
+
+endif

arch/arm/mach-mx5/Makefile

@@ -0,0 +1,9 @@
+#
+# Makefile for the linux kernel.
+#
+
+# Object file lists.
+obj-y   := cpu.o mm.o clock-mx51.o devices.o
+
+obj-$(CONFIG_MACH_MX51_BABBAGE) += board-mx51_babbage.o
+

arch/arm/mach-mx5/Makefile.boot

@@ -0,0 +1,3 @@
+   zreladdr-y	:= 0x90008000
+params_phys-y	:= 0x90000100
+initrd_phys-y	:= 0x90800000

arch/arm/mach-mx5/board-mx51_babbage.c

@@ -0,0 +1,98 @@
+/*
+ * Copyright 2009 Freescale Semiconductor, Inc. All Rights Reserved.
+ * Copyright (C) 2009-2010 Amit Kucheria <amit.kucheria@canonical.com>
+ *
+ * The code contained herein is licensed under the GNU General Public
+ * License. You may obtain a copy of the GNU General Public License
+ * Version 2 or later at the following locations:
+ *
+ * http://www.opensource.org/licenses/gpl-license.html
+ * http://www.gnu.org/copyleft/gpl.html
+ */
+
+#include <linux/init.h>
+#include <linux/platform_device.h>
+
+#include <mach/common.h>
+#include <mach/hardware.h>
+#include <mach/imx-uart.h>
+#include <mach/iomux-mx51.h>
+
+#include <asm/irq.h>
+#include <asm/setup.h>
+#include <asm/mach-types.h>
+#include <asm/mach/arch.h>
+#include <asm/mach/time.h>
+
+#include "devices.h"
+
+static struct platform_device *devices[] __initdata = {
+	&mxc_fec_device,
+};
+
+static struct pad_desc mx51babbage_pads[] = {
+	/* UART1 */
+	MX51_PAD_UART1_RXD__UART1_RXD,
+	MX51_PAD_UART1_TXD__UART1_TXD,
+	MX51_PAD_UART1_RTS__UART1_RTS,
+	MX51_PAD_UART1_CTS__UART1_CTS,
+
+	/* UART2 */
+	MX51_PAD_UART2_RXD__UART2_RXD,
+	MX51_PAD_UART2_TXD__UART2_TXD,
+
+	/* UART3 */
+	MX51_PAD_EIM_D25__UART3_RXD,
+	MX51_PAD_EIM_D26__UART3_TXD,
+	MX51_PAD_EIM_D27__UART3_RTS,
+	MX51_PAD_EIM_D24__UART3_CTS,
+};
+
+/* Serial ports */
+#if defined(CONFIG_SERIAL_IMX) || defined(CONFIG_SERIAL_IMX_MODULE)
+static struct imxuart_platform_data uart_pdata = {
+	.flags = IMXUART_HAVE_RTSCTS,
+};
+
+static inline void mxc_init_imx_uart(void)
+{
+	mxc_register_device(&mxc_uart_device0, &uart_pdata);
+	mxc_register_device(&mxc_uart_device1, &uart_pdata);
+	mxc_register_device(&mxc_uart_device2, &uart_pdata);
+}
+#else /* !SERIAL_IMX */
+static inline void mxc_init_imx_uart(void)
+{
+}
+#endif /* SERIAL_IMX */
+
+/*
+ * Board specific initialization.
+ */
+static void __init mxc_board_init(void)
+{
+	mxc_iomux_v3_setup_multiple_pads(mx51babbage_pads,
+					ARRAY_SIZE(mx51babbage_pads));
+	mxc_init_imx_uart();
+	platform_add_devices(devices, ARRAY_SIZE(devices));
+}
+
+static void __init mx51_babbage_timer_init(void)
+{
+	mx51_clocks_init(32768, 24000000, 22579200, 24576000);
+}
+
+static struct sys_timer mxc_timer = {
+	.init	= mx51_babbage_timer_init,
+};
+
+MACHINE_START(MX51_BABBAGE, "Freescale MX51 Babbage Board")
+	/* Maintainer: Amit Kucheria <amit.kucheria@canonical.com> */
+	.phys_io = MX51_AIPS1_BASE_ADDR,
+	.io_pg_offst = ((MX51_AIPS1_BASE_ADDR_VIRT) >> 18) & 0xfffc,
+	.boot_params = PHYS_OFFSET + 0x100,
+	.map_io = mx51_map_io,
+	.init_irq = mx51_init_irq,
+	.init_machine = mxc_board_init,
+	.timer = &mxc_timer,
+MACHINE_END

arch/arm/plat-mxc/Kconfig

@@ -41,6 +41,13 @@ config ARCH_MXC91231
 	help
 	  This enables support for systems based on the Freescale MXC91231 family
 
+config ARCH_MX5
+	bool "MX5-based"
+	select CPU_V7
+	select COMMON_CLKDEV
+	help
+	  This enables support for systems based on the Freescale i.MX51 family
+
 endchoice
 
 source "arch/arm/mach-mx1/Kconfig"
@@ -48,6 +55,7 @@ source "arch/arm/mach-mx2/Kconfig"
 source "arch/arm/mach-mx3/Kconfig"
 source "arch/arm/mach-mx25/Kconfig"
 source "arch/arm/mach-mxc91231/Kconfig"
+source "arch/arm/mach-mx5/Kconfig"
 
 endmenu