dev-common.c

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/*
 *  Atheros AR71XX/AR724X/AR913X common devices
 *
 *  Copyright (C) 2008-2011 Gabor Juhos <[email protected]>
 *  Copyright (C) 2008 Imre Kaloz <[email protected]>
 *
 *  Parts of this file are based on Atheros' 2.6.15 BSP
 *
 *  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/platform_device.h>
#include <linux/serial_8250.h>
#include <linux/clk.h>
#include <linux/err.h>

#include <asm/mach-ath79/ath79.h>
#include <asm/mach-ath79/ar71xx_regs.h>
#include <asm/mach-ath79/ar933x_uart_platform.h>
#include "common.h"
#include "dev-common.h"

static struct resource ath79_uart_resources[] = {
    {
        .start  = AR71XX_UART_BASE,
        .end    = AR71XX_UART_BASE + AR71XX_UART_SIZE - 1,
        .flags  = IORESOURCE_MEM,
    },
};

#define AR71XX_UART_FLAGS (UPF_BOOT_AUTOCONF | UPF_SKIP_TEST | UPF_IOREMAP)
static struct plat_serial8250_port ath79_uart_data[] = {
    {
        .mapbase    = AR71XX_UART_BASE,
        .irq        = ATH79_MISC_IRQ_UART,
        .flags      = AR71XX_UART_FLAGS,
        .iotype     = UPIO_MEM32,
        .regshift   = 2,
    }, {
        /* terminating entry */
    }
};

static struct platform_device ath79_uart_device = {
    .name       = "serial8250",
    .id     = PLAT8250_DEV_PLATFORM,
    .resource   = ath79_uart_resources,
    .num_resources  = ARRAY_SIZE(ath79_uart_resources),
    .dev = {
        .platform_data  = ath79_uart_data
    },
};

static struct resource ar933x_uart_resources[] = {
    {
        .start  = AR933X_UART_BASE,
        .end    = AR933X_UART_BASE + AR71XX_UART_SIZE - 1,
        .flags  = IORESOURCE_MEM,
    },
    {
        .start  = ATH79_MISC_IRQ_UART,
        .end    = ATH79_MISC_IRQ_UART,
        .flags  = IORESOURCE_IRQ,
    },
};

static struct ar933x_uart_platform_data ar933x_uart_data;
static struct platform_device ar933x_uart_device = {
    .name       = "ar933x-uart",
    .id     = -1,
    .resource   = ar933x_uart_resources,
    .num_resources  = ARRAY_SIZE(ar933x_uart_resources),
    .dev = {
        .platform_data  = &ar933x_uart_data,
    },
};

void __init ath79_register_uart(void)
{
    struct clk *clk;

    clk = clk_get(NULL, "uart");
    if (IS_ERR(clk))
        panic("unable to get UART clock, err=%ld", PTR_ERR(clk));

    if (soc_is_ar71xx() ||
        soc_is_ar724x() ||
        soc_is_ar913x() ||
        soc_is_ar934x()) {
        ath79_uart_data[0].uartclk = clk_get_rate(clk);
        platform_device_register(&ath79_uart_device);
    } else if (soc_is_ar933x()) {
        ar933x_uart_data.uartclk = clk_get_rate(clk);
        platform_device_register(&ar933x_uart_device);
    } else {
        BUG();
    }
}

static struct platform_device ath79_wdt_device = {
    .name       = "ath79-wdt",
    .id     = -1,
};

void __init ath79_register_wdt(void)
{
    platform_device_register(&ath79_wdt_device);
}