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    Subject[PATCH V2 1/4] ARM: Xilinx: Adding Xilinx board support
    Date
    The 1st board support is minimal to get a system up and running
    on the Xilinx platform.

    Signed-off-by: John Linn <john.linn@xilinx.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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