[PATCH 2/4] ARM: Xilinx: Adding Xilinx board support

John Linn john.linn at xilinx.com
Sat Feb 5 11:17:15 EST 2011


The 1st board support is minimal to get a system up and running
on the Xilinx platform.

Signed-off-by: John Linn <john.linn at xilinx.com>
---
 arch/arm/mach-xilinx/Kconfig       |   14 ++++
 arch/arm/mach-xilinx/Makefile      |    6 ++
 arch/arm/mach-xilinx/Makefile.boot |    3 +
 arch/arm/mach-xilinx/board_ep107.c |   81 ++++++++++++++++++++++
 arch/arm/mach-xilinx/common.c      |  132 ++++++++++++++++++++++++++++++++++++
 arch/arm/mach-xilinx/common.h      |   32 +++++++++
 6 files changed, 268 insertions(+), 0 deletions(-)
 create mode 100644 arch/arm/mach-xilinx/Kconfig
 create mode 100644 arch/arm/mach-xilinx/Makefile
 create mode 100644 arch/arm/mach-xilinx/Makefile.boot
 create mode 100644 arch/arm/mach-xilinx/board_ep107.c
 create mode 100644 arch/arm/mach-xilinx/common.c
 create mode 100644 arch/arm/mach-xilinx/common.h

diff --git a/arch/arm/mach-xilinx/Kconfig b/arch/arm/mach-xilinx/Kconfig
new file mode 100644
index 0000000..11f9e65
--- /dev/null
+++ b/arch/arm/mach-xilinx/Kconfig
@@ -0,0 +1,14 @@
+if ARCH_XILINX
+
+choice
+        prompt "Board Selection"
+	default XILINX_EP107
+
+config XILINX_EP107
+	bool "Xilinx EP107 Board"
+	help
+	  Select if you are using a Xilinx EP107 board.
+
+endchoice
+
+endif
diff --git a/arch/arm/mach-xilinx/Makefile b/arch/arm/mach-xilinx/Makefile
new file mode 100644
index 0000000..194f9e4
--- /dev/null
+++ b/arch/arm/mach-xilinx/Makefile
@@ -0,0 +1,6 @@
+#
+# Makefile for the linux kernel.
+#
+
+# Common support
+obj-y := common.o board_ep107.o timer.o
diff --git a/arch/arm/mach-xilinx/Makefile.boot b/arch/arm/mach-xilinx/Makefile.boot
new file mode 100644
index 0000000..67039c3
--- /dev/null
+++ b/arch/arm/mach-xilinx/Makefile.boot
@@ -0,0 +1,3 @@
+   zreladdr-y	:= 0x00008000
+params_phys-y	:= 0x00000100
+initrd_phys-y	:= 0x00800000
diff --git a/arch/arm/mach-xilinx/board_ep107.c b/arch/arm/mach-xilinx/board_ep107.c
new file mode 100644
index 0000000..233e744
--- /dev/null
+++ b/arch/arm/mach-xilinx/board_ep107.c
@@ -0,0 +1,81 @@
+/* arch/arm/mach-xilinx/board_ep107.c
+ *
+ * This file contains code specific to the Xilinx EP107 board.
+ *
+ *  Copyright (C) 2011 Xilinx
+ *
+ * based on /arch/arm/mach-realview/core.c
+ *
+ *  Copyright (C) 1999 - 2003 ARM Limited
+ *  Copyright (C) 2000 Deep Blue Solutions Ltd
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+
+#include <linux/platform_device.h>
+#include <asm/mach-types.h>
+#include <asm/mach/arch.h>
+#include <mach/hardware.h>
+#include <linux/clkdev.h>
+#include "common.h"
+
+/*
+ * Fixed clocks for now
+ */
+
+static struct clk ref50_clk = {
+	.rate	= 50000000,
+};
+
+/* Create all the platform devices for the board */
+
+static struct resource uart0[] = {
+	{
+		.start = UART0_BASE,
+		.end = UART0_BASE + 0xFFF,
+		.flags = IORESOURCE_MEM,
+	}, {
+		.start = IRQ_UART0,
+		.end = IRQ_UART0,
+		.flags = IORESOURCE_IRQ,
+	},
+};
+
+static struct platform_device uart_device0 = {
+	.name = "xuartpss",
+	.id = 0,
+	.dev = {
+		.platform_data = &ref50_clk.rate,
+	},
+	.resource = uart0,
+	.num_resources = ARRAY_SIZE(uart0),
+};
+
+static struct platform_device *xilinx_pdevices[] __initdata = {
+	&uart_device0,
+};
+
+/**
+ * board_ep107_init - Board specific initialization for the Xilinx EP107 board.
+ *
+ **/
+static void __init board_ep107_init(void)
+{
+	system_init();
+	platform_device_init(xilinx_pdevices, ARRAY_SIZE(xilinx_pdevices));
+}
+
+MACHINE_START(XILINX_EP107, "Xilinx EP107")
+	.boot_params    = PHYS_OFFSET + 0x00000100,
+	.map_io         = map_io,
+	.init_irq       = irq_init,
+	.init_machine   = board_ep107_init,
+	.timer          = &xttcpss_sys_timer,
+MACHINE_END
diff --git a/arch/arm/mach-xilinx/common.c b/arch/arm/mach-xilinx/common.c
new file mode 100644
index 0000000..f7c51a7
--- /dev/null
+++ b/arch/arm/mach-xilinx/common.c
@@ -0,0 +1,132 @@
+/* arch/arm/mach-xilinx/common.c
+ *
+ * This file contains common code that is intended to be used across
+ * boards so that it's not replicated.
+ *
+ *  Copyright (C) 2011 Xilinx
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/cpumask.h>
+#include <linux/platform_device.h>
+#include <linux/clk.h>
+
+#include <asm/mach/map.h>
+#include <asm/page.h>
+#include <asm/hardware/gic.h>
+#include <asm/hardware/cache-l2x0.h>
+
+#include <mach/hardware.h>
+
+int clk_enable(struct clk *clk)
+{
+	return 0;
+}
+
+void clk_disable(struct clk *clk)
+{
+}
+
+/**
+ * system_init - System specific initialization, intended to be called from
+ *			board specific initialization.
+ *
+ **/
+void __init system_init(void)
+{
+#ifdef CONFIG_CACHE_L2X0
+	void *l2cache_base = (void *)PL310_L2CC_BASE;
+
+	/*
+	 * 64KB way size, 8-way associativity, parity disabled
+	 */
+	l2x0_init(l2cache_base, 0x02060000, 0xF0F0FFFF);
+#endif
+}
+
+/**
+ * irq_init - Interrupt controller initialization for the GIC.
+ *
+ **/
+void __init irq_init(void)
+{
+	gic_cpu_base_addr = (void __iomem *)SCU_GIC_CPU_BASE;
+	gic_init(0, 29, (void __iomem *)SCU_GIC_DIST_BASE, gic_cpu_base_addr);
+}
+
+/* The minimum devices needed to be mapped before the VM system is up and
+ * running include the GIC, UART and Timer Counter.
+ */
+
+static struct map_desc io_desc[] __initdata = {
+	{
+		.virtual	= TTC0_BASE,
+		.pfn		= __phys_to_pfn(TTC0_BASE),
+		.length		= SZ_4K,
+		.type		= MT_DEVICE,
+	}, {
+		.virtual	= SCU_PERIPH_BASE,
+		.pfn		= __phys_to_pfn(SCU_PERIPH_BASE),
+		.length		= SZ_8K,
+		.type		= MT_DEVICE,
+	}, {
+		.virtual	= PL310_L2CC_BASE,
+		.pfn		= __phys_to_pfn(PL310_L2CC_BASE),
+		.length		= SZ_4K,
+		.type		= MT_DEVICE,
+	},
+
+#ifdef CONFIG_DEBUG_LL
+	{
+		.virtual	= UART0_BASE,
+		.pfn		= __phys_to_pfn(UART0_BASE),
+		.length		= SZ_4K,
+		.type		= MT_DEVICE,
+	},
+#endif
+
+};
+
+/**
+ * map_io - Create memory mappings needed for early I/O.
+ *
+ **/
+void __init map_io(void)
+{
+	iotable_init(io_desc, ARRAY_SIZE(io_desc));
+}
+
+/**
+ * platform_device_init - Initialize all the platform devices.
+ *
+ **/
+void __init platform_device_init(struct platform_device *xilinx_pdevices[],
+					int count)
+{
+	int ret, i;
+
+	/* Initialize all the platform devices */
+
+	for (i = 0; i < count; i++) {
+
+		pr_info("registering platform device '%s' id %d\n",
+			xilinx_pdevices[i]->name,
+			xilinx_pdevices[i]->id);
+
+		ret = platform_device_register(xilinx_pdevices[i]);
+		if (ret)
+			pr_info("Unable to register platform device '%s': %d\n",
+				xilinx_pdevices[i]->name, ret);
+	}
+}
+
diff --git a/arch/arm/mach-xilinx/common.h b/arch/arm/mach-xilinx/common.h
new file mode 100644
index 0000000..49de295
--- /dev/null
+++ b/arch/arm/mach-xilinx/common.h
@@ -0,0 +1,32 @@
+/* arch/arm/mach-xilinx/common.h
+ *
+ * This file contains common function prototypes to avoid externs
+ * in the c files.
+ *
+ *  Copyright (C) 2011 Xilinx
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+
+#ifndef __MACH_XILINX_COMMON_H__
+#define __MACH_XILINX_COMMON_H__
+
+#include <linux/init.h>
+#include <linux/platform_device.h>
+
+void __init system_init(void);
+void __init irq_init(void);
+void __init map_io(void);
+void __init platform_device_init(struct platform_device *pdevices[],
+					int count);
+
+extern struct sys_timer xttcpss_sys_timer;
+
+#endif
-- 
1.6.2.1



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