devices.c

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/*
 * Common devices definition for Gemini
 *
 * Copyright (C) 2008-2009 Paulius Zaleckas <[email protected]>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/io.h>
#include <linux/platform_device.h>
#include <linux/serial_8250.h>
#include <linux/mtd/physmap.h>

#include <mach/irqs.h>
#include <mach/hardware.h>
#include <mach/global_reg.h>

static struct plat_serial8250_port serial_platform_data[] = {
    {
        .membase    = (void *)IO_ADDRESS(GEMINI_UART_BASE),
        .mapbase    = GEMINI_UART_BASE,
        .irq        = IRQ_UART,
        .uartclk    = UART_CLK,
        .regshift   = 2,
        .iotype     = UPIO_MEM,
        .type       = PORT_16550A,
        .flags      = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST | UPF_FIXED_TYPE,
    },
    {},
};

static struct platform_device serial_device = {
    .name   = "serial8250",
    .id = PLAT8250_DEV_PLATFORM,
    .dev    = {
        .platform_data = serial_platform_data,
    },
};

int platform_register_uart(void)
{
    return platform_device_register(&serial_device);
}

static struct resource flash_resource = {
    .start  = GEMINI_FLASH_BASE,
    .flags  = IORESOURCE_MEM,
};

static struct physmap_flash_data pflash_platform_data = {};

static struct platform_device pflash_device = {
    .name   = "physmap-flash",
    .id = 0,
    .dev    = {
        .platform_data = &pflash_platform_data,
    },
    .resource = &flash_resource,
    .num_resources = 1,
};

int platform_register_pflash(unsigned int size, struct mtd_partition *parts,
                 unsigned int nr_parts)
{
    unsigned int reg;

    reg = __raw_readl(IO_ADDRESS(GEMINI_GLOBAL_BASE) + GLOBAL_STATUS);

    if ((reg & FLASH_TYPE_MASK) != FLASH_TYPE_PARALLEL)
        return -ENXIO;

    if (reg & FLASH_WIDTH_16BIT)
        pflash_platform_data.width = 2;
    else
        pflash_platform_data.width = 1;

    /* enable parallel flash pins and disable others */
    reg = __raw_readl(IO_ADDRESS(GEMINI_GLOBAL_BASE) + GLOBAL_MISC_CTRL);
    reg &= ~PFLASH_PADS_DISABLE;
    reg |= SFLASH_PADS_DISABLE | NAND_PADS_DISABLE;
    __raw_writel(reg, IO_ADDRESS(GEMINI_GLOBAL_BASE) + GLOBAL_MISC_CTRL);

    flash_resource.end = flash_resource.start + size - 1;

    pflash_platform_data.parts = parts;
    pflash_platform_data.nr_parts = nr_parts;

    return platform_device_register(&pflash_device);
}

static struct resource gemini_rtc_resources[] = {
    [0] = {
        .start  = GEMINI_RTC_BASE,
        .end    = GEMINI_RTC_BASE + 0x24,
        .flags  = IORESOURCE_MEM,
    },
    [1] = {
        .start  = IRQ_RTC,
        .end    = IRQ_RTC,
        .flags  = IORESOURCE_IRQ,
    },
};

static struct platform_device gemini_rtc_device = {
    .name       = "rtc-gemini",
    .id     = 0,
    .num_resources  = ARRAY_SIZE(gemini_rtc_resources),
    .resource   = gemini_rtc_resources,
};

int __init platform_register_rtc(void)
{
    return platform_device_register(&gemini_rtc_device);
}