serial.c

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/*
 *  Copyright (C) 2010, Lars-Peter Clausen <[email protected]>
 *  JZ4740 serial support
 *
 *  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.
 *
 *  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.,
 *  675 Mass Ave, Cambridge, MA 02139, USA.
 *
 */

#include <linux/io.h>
#include <linux/serial_core.h>
#include <linux/serial_reg.h>

void jz4740_serial_out(struct uart_port *p, int offset, int value)
{
    switch (offset) {
    case UART_FCR:
        value |= 0x10; /* Enable uart module */
        break;
    case UART_IER:
        value |= (value & 0x4) << 2;
        break;
    default:
        break;
    }
    writeb(value, p->membase + (offset << p->regshift));
}