serial.c

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/*
 * This file is subject to the terms and conditions of the GNU General Public
 * License.  See the file "COPYING" in the main directory of this archive
 * for more details.
 *
 * Copyright (C) 2007 Ralf Baechle ([email protected])
 *
 * Copyright (C) 2009 Lemote, Inc.
 * Author: Yan hua ([email protected])
 * Author: Wu Zhangjin ([email protected])
 */

#include <linux/io.h>
#include <linux/init.h>
#include <linux/serial_8250.h>

#include <asm/bootinfo.h>

#include <loongson.h>
#include <machine.h>

#define PORT(int)           \
{                               \
    .irq        = int,                  \
    .uartclk    = 1843200,              \
    .iotype     = UPIO_PORT,                \
    .flags      = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST,    \
    .regshift   = 0,                    \
}

#define PORT_M(int)             \
{                               \
    .irq        = MIPS_CPU_IRQ_BASE + (int),        \
    .uartclk    = 3686400,              \
    .iotype     = UPIO_MEM,             \
    .membase    = (void __iomem *)NULL,         \
    .flags      = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST,    \
    .regshift   = 0,                    \
}

static struct plat_serial8250_port uart8250_data[][2] = {
    [MACH_LOONGSON_UNKNOWN]         {},
    [MACH_LEMOTE_FL2E]              {PORT(4), {} },
    [MACH_LEMOTE_FL2F]              {PORT(3), {} },
    [MACH_LEMOTE_ML2F7]             {PORT_M(3), {} },
    [MACH_LEMOTE_YL2F89]            {PORT_M(3), {} },
    [MACH_DEXXON_GDIUM2F10]         {PORT_M(3), {} },
    [MACH_LEMOTE_NAS]               {PORT_M(3), {} },
    [MACH_LEMOTE_LL2F]              {PORT(3), {} },
    [MACH_LOONGSON_END]             {},
};

static struct platform_device uart8250_device = {
    .name = "serial8250",
    .id = PLAT8250_DEV_PLATFORM,
};

static int __init serial_init(void)
{
    unsigned char iotype;

    iotype = uart8250_data[mips_machtype][0].iotype;

    if (UPIO_MEM == iotype)
        uart8250_data[mips_machtype][0].membase =
            (void __iomem *)_loongson_uart_base;
    else if (UPIO_PORT == iotype)
        uart8250_data[mips_machtype][0].iobase =
            loongson_uart_base - LOONGSON_PCIIO_BASE;

    uart8250_device.dev.platform_data = uart8250_data[mips_machtype];

    return platform_device_register(&uart8250_device);
}

device_initcall(serial_init);