[PATCH 2/4] ARM: Xilinx: Adding Xilinx board support
From: John Linn <hidden>
Date: 2011-02-05 16:08:42
The 1st board support is minimal to get a system up and running on the Xilinx platform. Signed-off-by: John Linn <redacted> --- 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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