cpu-8815.c

Go to the documentation of this file.

/*
 * 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 <linux/slab.h>
#include <linux/irq.h>
#include <linux/dma-mapping.h>
#include <linux/platform_data/clk-nomadik.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 "cpu-8815.h"

/* The 8815 has 4 GPIO blocks, let's register them immediately */
static resource_size_t __initdata cpu8815_gpio_base[] = {
    NOMADIK_GPIO0_BASE,
    NOMADIK_GPIO1_BASE,
    NOMADIK_GPIO2_BASE,
    NOMADIK_GPIO3_BASE,
};

static struct platform_device *
cpu8815_add_gpio(int id, resource_size_t addr, int irq,
         struct nmk_gpio_platform_data *pdata)
{
    struct resource resources[] = {
        {
            .start  = addr,
            .end    = addr + 127,
            .flags  = IORESOURCE_MEM,
        },
        {
            .start  = irq,
            .end    = irq,
            .flags  = IORESOURCE_IRQ,
        }
    };

    return platform_device_register_resndata(NULL, "gpio", id,
                resources, ARRAY_SIZE(resources),
                pdata, sizeof(*pdata));
}

void cpu8815_add_gpios(resource_size_t *base, int num, int irq,
               struct nmk_gpio_platform_data *pdata)
{
    int first = 0;
    int i;

    for (i = 0; i < num; i++, first += 32, irq++) {
        pdata->first_gpio = first;
        pdata->first_irq = NOMADIK_GPIO_TO_IRQ(first);
        pdata->num_gpio = 32;

        cpu8815_add_gpio(i, base[i], irq, pdata);
    }
}

static inline void
cpu8815_add_pinctrl(struct device *parent, const char *name)
{
    struct platform_device_info pdevinfo = {
        .parent = parent,
        .name = name,
        .id = -1,
    };

    platform_device_register_full(&pdevinfo);
}

static int __init cpu8815_init(void)
{
    struct nmk_gpio_platform_data pdata = {
        /* No custom data yet */
    };

    cpu8815_add_gpios(cpu8815_gpio_base, ARRAY_SIZE(cpu8815_gpio_base),
              IRQ_GPIO0, &pdata);
    cpu8815_add_pinctrl(NULL, "pinctrl-stn8815");
    amba_apb_device_add(NULL, "rng", NOMADIK_RNG_BASE, SZ_4K, 0, 0, NULL, 0);
    amba_apb_device_add(NULL, "rtc-pl031", NOMADIK_RTC_BASE, SZ_4K, IRQ_RTC_RTT, 0, NULL, 0);
    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.
     */
    nomadik_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);
}