diff options
Diffstat (limited to 'kernel/arch/mips/jz4740/serial.c')
| -rw-r--r-- | kernel/arch/mips/jz4740/serial.c | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/kernel/arch/mips/jz4740/serial.c b/kernel/arch/mips/jz4740/serial.c new file mode 100644 index 000000000..d23de4582 --- /dev/null +++ b/kernel/arch/mips/jz4740/serial.c @@ -0,0 +1,33 @@ +/* + * Copyright (C) 2010, Lars-Peter Clausen <lars@metafoo.de> + * 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)); +} |