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Message-ID: <0e8b21c6-60ff-4f82-a8e6-5c2a0fe80372@VA3EHSMHS005.ehs.local>
Date: Wed, 9 Feb 2011 10:00:42 -0700
From: John Linn <john.linn@...inx.com>
To: <linux-arm-kernel@...ts.infradead.org>,
<linux-kernel@...r.kernel.org>, <linux@....linux.org.uk>,
<catalin.marinas@....com>, <glikely@...retlab.ca>
CC: John Linn <john.linn@...inx.com>
Subject: [PATCH V2 1/4] ARM: Xilinx: Adding Xilinx board support
The 1st board support is minimal to get a system up and running
on the Xilinx platform.
Signed-off-by: John Linn <john.linn@...inx.com>
---
V2 Changes
Updates based on Russell King's comments
minor cleanups
cleaned up physical/virtual addresses in early i/o table
Updated based on Jamie Iles's comment
added clk_get_rate() function
now using platform_add_devices() from platform code
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 | 82 ++++++++++++++++++++++++++
arch/arm/mach-xilinx/common.c | 113 ++++++++++++++++++++++++++++++++++++
arch/arm/mach-xilinx/common.h | 30 ++++++++++
6 files changed, 248 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..783343b
--- /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
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..769358c
--- /dev/null
+++ b/arch/arm/mach-xilinx/board_ep107.c
@@ -0,0 +1,82 @@
+/* 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/xilinx_soc.h>
+#include <mach/irqs.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_PHYS,
+ .end = UART0_PHYS + 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_add_devices(&xilinx_pdevices[0], 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..cbe1eb6
--- /dev/null
+++ b/arch/arm/mach-xilinx/common.c
@@ -0,0 +1,113 @@
+/* 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/xilinx_soc.h>
+#include <mach/clkdev.h>
+
+/*
+ * Clock function infrastructure.
+ */
+int clk_enable(struct clk *clk)
+{
+ return 0;
+}
+
+void clk_disable(struct clk *clk)
+{
+}
+
+unsigned long clk_get_rate(struct clk *clk)
+{
+ return clk->rate;
+}
+
+/**
+ * system_init - System specific initialization, intended to be called from
+ * board specific initialization.
+ *
+ **/
+void __init system_init(void)
+{
+#ifdef CONFIG_CACHE_L2X0
+ /*
+ * 64KB way size, 8-way associativity, parity disabled
+ */
+ l2x0_init(PL310_L2CC_BASE, 0x02060000, 0xF0F0FFFF);
+#endif
+}
+
+/**
+ * irq_init - Interrupt controller initialization for the GIC.
+ *
+ **/
+void __init irq_init(void)
+{
+ gic_init(0, 29, SCU_GIC_DIST_BASE, SCU_GIC_CPU_BASE);
+}
+
+/* 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_VIRT,
+ .pfn = __phys_to_pfn(TTC0_PHYS),
+ .length = SZ_4K,
+ .type = MT_DEVICE,
+ }, {
+ .virtual = SCU_PERIPH_VIRT,
+ .pfn = __phys_to_pfn(SCU_PERIPH_PHYS),
+ .length = SZ_8K,
+ .type = MT_DEVICE,
+ }, {
+ .virtual = PL310_L2CC_VIRT,
+ .pfn = __phys_to_pfn(PL310_L2CC_PHYS),
+ .length = SZ_4K,
+ .type = MT_DEVICE,
+ },
+
+#ifdef CONFIG_DEBUG_LL
+ {
+ .virtual = UART0_VIRT,
+ .pfn = __phys_to_pfn(UART0_PHYS),
+ .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));
+}
diff --git a/arch/arm/mach-xilinx/common.h b/arch/arm/mach-xilinx/common.h
new file mode 100644
index 0000000..54a1810
--- /dev/null
+++ b/arch/arm/mach-xilinx/common.h
@@ -0,0 +1,30 @@
+/* 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);
+
+extern struct sys_timer xttcpss_sys_timer;
+
+#endif
--
1.6.2.1
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