diff options
Diffstat (limited to 'arch/mips/vr4181/common/serial.c')
| -rw-r--r-- | arch/mips/vr4181/common/serial.c | 51 |
1 files changed, 51 insertions, 0 deletions
diff --git a/arch/mips/vr4181/common/serial.c b/arch/mips/vr4181/common/serial.c new file mode 100644 index 00000000000..3f62c62b107 --- /dev/null +++ b/arch/mips/vr4181/common/serial.c @@ -0,0 +1,51 @@ +/* + * Copyright 2001 MontaVista Software Inc. + * Author: Jun Sun, jsun@mvista.com or jsun@junsun.net + * + * arch/mips/vr4181/common/serial.c + * initialize serial port on vr4181. + * + * 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. + * + */ + +/* + * [jsun, 010925] + * You need to make sure rs_table has at least one element in + * drivers/char/serial.c file. There is no good way to do it right + * now. A workaround is to include CONFIG_SERIAL_MANY_PORTS in your + * configure file, which would gives you 64 ports and wastes 11K ram. + */ + +#include <linux/types.h> +#include <linux/kernel.h> +#include <linux/init.h> +#include <linux/serial.h> + +#include <asm/vr4181/vr4181.h> + +void __init vr4181_init_serial(void) +{ + struct serial_struct s; + + /* turn on UART clock */ + *VR4181_CMUCLKMSK |= VR4181_CMUCLKMSK_MSKSIU; + + /* clear memory */ + memset(&s, 0, sizeof(s)); + + s.line = 0; /* we set the first one */ + s.baud_base = 1152000; + s.irq = VR4181_IRQ_SIU; + s.flags = ASYNC_BOOT_AUTOCONF | ASYNC_SKIP_TEST; /* STD_COM_FLAGS */ + s.iomem_base = (u8*)VR4181_SIURB; + s.iomem_reg_shift = 0; + s.io_type = SERIAL_IO_MEM; + if (early_serial_setup(&s) != 0) { + panic("vr4181_init_serial() failed!"); + } +} + |