serial.c

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/*
 *  Registration of Lasat UART platform device.
 *
 *  Copyright (C) 2007  Brian Murphy <[email protected]>
 *
 *  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., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 */
#include <linux/errno.h>
#include <linux/init.h>
#include <linux/ioport.h>
#include <linux/platform_device.h>
#include <linux/serial_8250.h>

#include <asm/lasat/lasat.h>
#include <asm/lasat/serial.h>

static struct resource lasat_serial_res[2] __initdata;

static struct plat_serial8250_port lasat_serial8250_port[] = {
    {
        .iotype     = UPIO_MEM,
        .flags      = UPF_IOREMAP | UPF_BOOT_AUTOCONF |
                  UPF_SKIP_TEST,
    },
    {},
};

static __init int lasat_uart_add(void)
{
    struct platform_device *pdev;
    int retval;

    pdev = platform_device_alloc("serial8250", -1);
    if (!pdev)
        return -ENOMEM;

    if (!IS_LASAT_200()) {
        lasat_serial_res[0].start = KSEG1ADDR(LASAT_UART_REGS_BASE_100);
        lasat_serial_res[0].end = lasat_serial_res[0].start + LASAT_UART_REGS_SHIFT_100 * 8 - 1;
        lasat_serial_res[0].flags = IORESOURCE_MEM;
        lasat_serial_res[1].start = LASATINT_UART_100;
        lasat_serial_res[1].end = LASATINT_UART_100;
        lasat_serial_res[1].flags = IORESOURCE_IRQ;

        lasat_serial8250_port[0].mapbase = LASAT_UART_REGS_BASE_100;
        lasat_serial8250_port[0].uartclk = LASAT_BASE_BAUD_100 * 16;
        lasat_serial8250_port[0].regshift = LASAT_UART_REGS_SHIFT_100;
        lasat_serial8250_port[0].irq = LASATINT_UART_100;
    } else {
        lasat_serial_res[0].start = KSEG1ADDR(LASAT_UART_REGS_BASE_200);
        lasat_serial_res[0].end = lasat_serial_res[0].start + LASAT_UART_REGS_SHIFT_200 * 8 - 1;
        lasat_serial_res[0].flags = IORESOURCE_MEM;
        lasat_serial_res[1].start = LASATINT_UART_200;
        lasat_serial_res[1].end = LASATINT_UART_200;
        lasat_serial_res[1].flags = IORESOURCE_IRQ;

        lasat_serial8250_port[0].mapbase = LASAT_UART_REGS_BASE_200;
        lasat_serial8250_port[0].uartclk = LASAT_BASE_BAUD_200 * 16;
        lasat_serial8250_port[0].regshift = LASAT_UART_REGS_SHIFT_200;
        lasat_serial8250_port[0].irq = LASATINT_UART_200;
    }

    pdev->id = PLAT8250_DEV_PLATFORM;
    pdev->dev.platform_data = lasat_serial8250_port;

    retval = platform_device_add_resources(pdev, lasat_serial_res, ARRAY_SIZE(lasat_serial_res));
    if (retval)
        goto err_free_device;

    retval = platform_device_add(pdev);
    if (retval)
        goto err_free_device;

    return 0;

err_free_device:
    platform_device_put(pdev);

    return retval;
}
device_initcall(lasat_uart_add);