mxc: Core support for Freescale i.MX5 series

Add basic clock support, cpu identification, I/O mapping, interrupt
controller, serial port and ethernet.
Signed-off-by: Amit Kucheria <amit.kucheria@canonical.com>

arch/arm/mach-mx5/cpu.c

+/*
+ * Copyright 2008-2009 Freescale Semiconductor, Inc. All Rights Reserved.
+ *
+ * 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
+ *
+ * This file contains the CPU initialization code.
+ */
+
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <mach/hardware.h>
+#include <asm/io.h>
+
+static int __init post_cpu_init(void)
+{
+	unsigned int reg;
+	void __iomem *base;
+
+	if (!cpu_is_mx51())
+		return 0;
+
+	base = MX51_IO_ADDRESS(MX51_AIPS1_BASE_ADDR);
+	__raw_writel(0x0, base + 0x40);
+	__raw_writel(0x0, base + 0x44);
+	__raw_writel(0x0, base + 0x48);
+	__raw_writel(0x0, base + 0x4C);
+	reg = __raw_readl(base + 0x50) & 0x00FFFFFF;
+	__raw_writel(reg, base + 0x50);
+
+	base = MX51_IO_ADDRESS(MX51_AIPS2_BASE_ADDR);
+	__raw_writel(0x0, base + 0x40);
+	__raw_writel(0x0, base + 0x44);
+	__raw_writel(0x0, base + 0x48);
+	__raw_writel(0x0, base + 0x4C);
+	reg = __raw_readl(base + 0x50) & 0x00FFFFFF;
+	__raw_writel(reg, base + 0x50);
+
+	return 0;
+}
+
+postcore_initcall(post_cpu_init);

arch/arm/mach-mx5/devices.c

+/*
+ * Copyright 2009 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/platform_device.h>
+#include <mach/hardware.h>
+#include <mach/imx-uart.h>
+
+static struct resource uart0[] = {
+	{
+		.start = MX51_UART1_BASE_ADDR,
+		.end = MX51_UART1_BASE_ADDR + 0xfff,
+		.flags = IORESOURCE_MEM,
+	}, {
+		.start = MX51_MXC_INT_UART1,
+		.end = MX51_MXC_INT_UART1,
+		.flags = IORESOURCE_IRQ,
+	},
+};
+
+struct platform_device mxc_uart_device0 = {
+	.name = "imx-uart",
+	.id = 0,
+	.resource = uart0,
+	.num_resources = ARRAY_SIZE(uart0),
+};
+
+static struct resource uart1[] = {
+	{
+		.start = MX51_UART2_BASE_ADDR,
+		.end = MX51_UART2_BASE_ADDR + 0xfff,
+		.flags = IORESOURCE_MEM,
+	}, {
+		.start = MX51_MXC_INT_UART2,
+		.end = MX51_MXC_INT_UART2,
+		.flags = IORESOURCE_IRQ,
+	},
+};
+
+struct platform_device mxc_uart_device1 = {
+	.name = "imx-uart",
+	.id = 1,
+	.resource = uart1,
+	.num_resources = ARRAY_SIZE(uart1),
+};
+
+static struct resource uart2[] = {
+	{
+		.start = MX51_UART3_BASE_ADDR,
+		.end = MX51_UART3_BASE_ADDR + 0xfff,
+		.flags = IORESOURCE_MEM,
+	}, {
+		.start = MX51_MXC_INT_UART3,
+		.end = MX51_MXC_INT_UART3,
+		.flags = IORESOURCE_IRQ,
+	},
+};
+
+struct platform_device mxc_uart_device2 = {
+	.name = "imx-uart",
+	.id = 2,
+	.resource = uart2,
+	.num_resources = ARRAY_SIZE(uart2),
+};
+
+static struct resource mxc_fec_resources[] = {
+	{
+		.start	= MX51_MXC_FEC_BASE_ADDR,
+		.end	= MX51_MXC_FEC_BASE_ADDR + 0xfff,
+		.flags	= IORESOURCE_MEM,
+	}, {
+		.start	= MX51_MXC_INT_FEC,
+		.end	= MX51_MXC_INT_FEC,
+		.flags	= IORESOURCE_IRQ,
+	},
+};
+
+struct platform_device mxc_fec_device = {
+	.name = "fec",
+	.id = 0,
+	.num_resources = ARRAY_SIZE(mxc_fec_resources),
+	.resource = mxc_fec_resources,
+};
+
+/* Dummy definition to allow compiling in AVIC and TZIC simultaneously */
+int __init mxc_register_gpios(void)
+{
+	return 0;
+}

arch/arm/mach-mx5/devices.h

+extern struct platform_device mxc_uart_device0;
+extern struct platform_device mxc_uart_device1;
+extern struct platform_device mxc_uart_device2;
+extern struct platform_device mxc_fec_device;

arch/arm/mach-mx5/mm.c

+/*
+ * Copyright 2008-2009 Freescale Semiconductor, Inc. All Rights Reserved.
+ *
+ * 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
+ *
+ * Create static mapping between physical to virtual memory.
+ */
+
+#include <linux/mm.h>
+#include <linux/init.h>
+
+#include <asm/mach/map.h>
+
+#include <mach/hardware.h>
+#include <mach/common.h>
+#include <mach/iomux-v3.h>
+
+/*
+ * Define the MX51 memory map.
+ */
+static struct map_desc mxc_io_desc[] __initdata = {
+	{
+		.virtual = MX51_IRAM_BASE_ADDR_VIRT,
+		.pfn = __phys_to_pfn(MX51_IRAM_BASE_ADDR),
+		.length = MX51_IRAM_SIZE,
+		.type = MT_DEVICE
+	}, {
+		.virtual = MX51_DEBUG_BASE_ADDR_VIRT,
+		.pfn = __phys_to_pfn(MX51_DEBUG_BASE_ADDR),
+		.length = MX51_DEBUG_SIZE,
+		.type = MT_DEVICE
+	}, {
+		.virtual = MX51_TZIC_BASE_ADDR_VIRT,
+		.pfn = __phys_to_pfn(MX51_TZIC_BASE_ADDR),
+		.length = MX51_TZIC_SIZE,
+		.type = MT_DEVICE
+	}, {
+		.virtual = MX51_AIPS1_BASE_ADDR_VIRT,
+		.pfn = __phys_to_pfn(MX51_AIPS1_BASE_ADDR),
+		.length = MX51_AIPS1_SIZE,
+		.type = MT_DEVICE
+	}, {
+		.virtual = MX51_SPBA0_BASE_ADDR_VIRT,
+		.pfn = __phys_to_pfn(MX51_SPBA0_BASE_ADDR),
+		.length = MX51_SPBA0_SIZE,
+		.type = MT_DEVICE
+	}, {
+		.virtual = MX51_AIPS2_BASE_ADDR_VIRT,
+		.pfn = __phys_to_pfn(MX51_AIPS2_BASE_ADDR),
+		.length = MX51_AIPS2_SIZE,
+		.type = MT_DEVICE
+	}, {
+		.virtual = MX51_NFC_AXI_BASE_ADDR_VIRT,
+		.pfn = __phys_to_pfn(MX51_NFC_AXI_BASE_ADDR),
+		.length = MX51_NFC_AXI_SIZE,
+		.type = MT_DEVICE
+	},
+};
+
+/*
+ * This function initializes the memory map. It is called during the
+ * system startup to create static physical to virtual memory mappings
+ * for the IO modules.
+ */
+void __init mx51_map_io(void)
+{
+	u32 tzic_addr;
+
+	if (mx51_revision() < MX51_CHIP_REV_2_0)
+		tzic_addr = 0x8FFFC000;
+	else
+		tzic_addr = 0xE0003000;
+	mxc_io_desc[2].pfn =  __phys_to_pfn(tzic_addr);
+
+	mxc_set_cpu_type(MXC_CPU_MX51);
+	mxc_iomux_v3_init(MX51_IO_ADDRESS(MX51_IOMUXC_BASE_ADDR));
+	mxc_arch_reset_init(MX51_IO_ADDRESS(MX51_WDOG_BASE_ADDR));
+	iotable_init(mxc_io_desc, ARRAY_SIZE(mxc_io_desc));
+}
+
+void __init mx51_init_irq(void)
+{
+	tzic_init_irq(MX51_IO_ADDRESS(MX51_TZIC_BASE_ADDR));
+}

arch/arm/plat-mxc/include/mach/common.h

@@ -20,6 +20,7 @@ extern void mx25_map_io(void);
 extern void mx27_map_io(void);
 extern void mx31_map_io(void);
 extern void mx35_map_io(void);
+extern void mx51_map_io(void);
 extern void mxc91231_map_io(void);
 extern void mxc_init_irq(void __iomem *);
 extern void tzic_init_irq(void __iomem *);
@@ -29,6 +30,7 @@ extern void mx25_init_irq(void);
 extern void mx27_init_irq(void);
 extern void mx31_init_irq(void);
 extern void mx35_init_irq(void);
+extern void mx51_init_irq(void);
 extern void mxc91231_init_irq(void);
 extern void mxc_timer_init(struct clk *timer_clk, void __iomem *, int);
 extern int mx1_clocks_init(unsigned long fref);
@@ -37,6 +39,8 @@ extern int mx25_clocks_init(void);
 extern int mx27_clocks_init(unsigned long fref);
 extern int mx31_clocks_init(unsigned long fref);
 extern int mx35_clocks_init(void);
+extern int mx51_clocks_init(unsigned long ckil, unsigned long osc,
+			unsigned long ckih1, unsigned long ckih2);
 extern int mxc91231_clocks_init(unsigned long fref);
 extern int mxc_register_gpios(void);
 extern int mxc_register_device(struct platform_device *pdev, void *data);

arch/arm/plat-mxc/include/mach/iomux-v3.h

@@ -81,11 +81,13 @@ struct pad_desc {
 
 #define PAD_CTL_ODE			(1 << 3)
 
-#define PAD_CTL_DSE_STANDARD		(0 << 1)
-#define PAD_CTL_DSE_HIGH		(1 << 1)
-#define PAD_CTL_DSE_MAX			(2 << 1)
+#define PAD_CTL_DSE_LOW			(0 << 1)
+#define PAD_CTL_DSE_MED			(1 << 1)
+#define PAD_CTL_DSE_HIGH		(2 << 1)
+#define PAD_CTL_DSE_MAX			(3 << 1)
 
 #define PAD_CTL_SRE_FAST		(1 << 0)
+#define PAD_CTL_SRE_SLOW		(0 << 0)
 
 /*
  * setups a single pad in the iomuxer