xref: /openbmc/linux/arch/arm/mach-nomadik/cpu-8815.c (revision 53d68af1)

/*
 * Copyright STMicroelectronics, 2007.
 *
 *  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.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  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/types.h>
#include <linux/init.h>
#include <linux/device.h>
#include <linux/amba/bus.h>
#include <linux/platform_device.h>
#include <linux/io.h>

#include <plat/gpio-nomadik.h>
#include <mach/hardware.h>
#include <mach/irqs.h>
#include <asm/mach/map.h>
#include <asm/hardware/vic.h>

#include <asm/cacheflush.h>
#include <asm/hardware/cache-l2x0.h>

#include "clock.h"
#include "cpu-8815.h"

#define __MEM_4K_RESOURCE(x) \
	.res = {.start = (x), .end = (x) + SZ_4K - 1, .flags = IORESOURCE_MEM}

/* The 8815 has 4 GPIO blocks, let's register them immediately */

#define GPIO_RESOURCE(block)						\
	{								\
		.start	= NOMADIK_GPIO##block##_BASE,			\
		.end	= NOMADIK_GPIO##block##_BASE + SZ_4K - 1,	\
		.flags	= IORESOURCE_MEM,				\
	},								\
	{								\
		.start	= IRQ_GPIO##block,				\
		.end	= IRQ_GPIO##block,				\
		.flags	= IORESOURCE_IRQ,				\
	}

#define GPIO_DEVICE(block)						\
	{								\
		.name 		= "gpio",				\
		.id		= block,				\
		.num_resources 	= 2,					\
		.resource	= &cpu8815_gpio_resources[block * 2],	\
		.dev = {						\
			.platform_data = &cpu8815_gpio[block],		\
		},							\
	}

static struct nmk_gpio_platform_data cpu8815_gpio[] = {
	{
		.name = "GPIO-0-31",
		.first_gpio = 0,
		.first_irq = NOMADIK_GPIO_TO_IRQ(0),
	}, {
		.name = "GPIO-32-63",
		.first_gpio = 32,
		.first_irq = NOMADIK_GPIO_TO_IRQ(32),
	}, {
		.name = "GPIO-64-95",
		.first_gpio = 64,
		.first_irq = NOMADIK_GPIO_TO_IRQ(64),
	}, {
		.name = "GPIO-96-127", /* 124..127 not routed to pin */
		.first_gpio = 96,
		.first_irq = NOMADIK_GPIO_TO_IRQ(96),
	}
};

static struct resource cpu8815_gpio_resources[] = {
	GPIO_RESOURCE(0),
	GPIO_RESOURCE(1),
	GPIO_RESOURCE(2),
	GPIO_RESOURCE(3),
};

static struct platform_device cpu8815_platform_gpio[] = {
	GPIO_DEVICE(0),
	GPIO_DEVICE(1),
	GPIO_DEVICE(2),
	GPIO_DEVICE(3),
};

static AMBA_APB_DEVICE(cpu8815_amba_rng, "rng", 0, NOMADIK_RNG_BASE, { }, NULL);

static struct platform_device *platform_devs[] __initdata = {
	cpu8815_platform_gpio + 0,
	cpu8815_platform_gpio + 1,
	cpu8815_platform_gpio + 2,
	cpu8815_platform_gpio + 3,
};

static struct amba_device *amba_devs[] __initdata = {
	&cpu8815_amba_rng_device
};

static int __init cpu8815_init(void)
{
	int i;

	platform_add_devices(platform_devs, ARRAY_SIZE(platform_devs));
	for (i = 0; i < ARRAY_SIZE(amba_devs); i++)
		amba_device_register(amba_devs[i], &iomem_resource);
	return 0;
}
arch_initcall(cpu8815_init);

/* All SoC devices live in the same area (see hardware.h) */
static struct map_desc nomadik_io_desc[] __initdata = {
	{
		.virtual =	NOMADIK_IO_VIRTUAL,
		.pfn =		__phys_to_pfn(NOMADIK_IO_PHYSICAL),
		.length =	NOMADIK_IO_SIZE,
		.type = 	MT_DEVICE,
	}
	/* static ram and secured ram may be added later */
};

void __init cpu8815_map_io(void)
{
	iotable_init(nomadik_io_desc, ARRAY_SIZE(nomadik_io_desc));
}

void __init cpu8815_init_irq(void)
{
	/* This modified VIC cell has two register blocks, at 0 and 0x20 */
	vic_init(io_p2v(NOMADIK_IC_BASE + 0x00), IRQ_VIC_START +  0, ~0, 0);
	vic_init(io_p2v(NOMADIK_IC_BASE + 0x20), IRQ_VIC_START + 32, ~0, 0);

	/*
	 * Init clocks here so that they are available for system timer
	 * initialization.
	 */
	clk_init();
}

/*
 * This function is called from the board init ("init_machine").
 */
 void __init cpu8815_platform_init(void)
{
#ifdef CONFIG_CACHE_L2X0
	/* At full speed latency must be >=2, so 0x249 in low bits */
	l2x0_init(io_p2v(NOMADIK_L2CC_BASE), 0x00730249, 0xfe000fff);
#endif
	 return;
}

void cpu8815_restart(char mode, const char *cmd)
{
	void __iomem *src_rstsr = io_p2v(NOMADIK_SRC_BASE + 0x18);

	/* FIXME: use egpio when implemented */

	/* Write anything to Reset status register */
	writel(1, src_rstsr);
}