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/arch/mips/jz4740/serial.c

http://github.com/mirrors/linux
C | 33 lines | 17 code | 2 blank | 14 comment | 1 complexity | 96fd0c904451ff809280e77fa03827c6 MD5 | raw file
 1/*
 2 *  Copyright (C) 2010, Lars-Peter Clausen <lars@metafoo.de>
 3 *  JZ4740 serial support
 4 *
 5 *  This program is free software; you can redistribute	 it and/or modify it
 6 *  under  the terms of	 the GNU General  Public License as published by the
 7 *  Free Software Foundation;  either version 2 of the	License, or (at your
 8 *  option) any later version.
 9 *
10 *  You should have received a copy of the  GNU General Public License along
11 *  with this program; if not, write  to the Free Software Foundation, Inc.,
12 *  675 Mass Ave, Cambridge, MA 02139, USA.
13 *
14 */
15
16#include <linux/io.h>
17#include <linux/serial_core.h>
18#include <linux/serial_reg.h>
19
20void jz4740_serial_out(struct uart_port *p, int offset, int value)
21{
22	switch (offset) {
23	case UART_FCR:
24		value |= 0x10; /* Enable uart module */
25		break;
26	case UART_IER:
27		value |= (value & 0x4) << 2;
28		break;
29	default:
30		break;
31	}
32	writeb(value, p->membase + (offset << p->regshift));
33}