diff options
Diffstat (limited to 'arch/mips/loongson/common/uart_base.c')
| -rw-r--r-- | arch/mips/loongson/common/uart_base.c | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/arch/mips/loongson/common/uart_base.c b/arch/mips/loongson/common/uart_base.c new file mode 100644 index 00000000000..78ff66ae749 --- /dev/null +++ b/arch/mips/loongson/common/uart_base.c @@ -0,0 +1,45 @@ +/* + * Copyright (C) 2009 Lemote Inc. + * Author: Wu Zhangjin, wuzj@lemote.com + * + * 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. + */ + +#include <linux/module.h> +#include <asm/bootinfo.h> + +#include <loongson.h> + +/* ioremapped */ +unsigned long _loongson_uart_base; +EXPORT_SYMBOL(_loongson_uart_base); +/* raw */ +unsigned long loongson_uart_base; +EXPORT_SYMBOL(loongson_uart_base); + +void prom_init_loongson_uart_base(void) +{ + switch (mips_machtype) { + case MACH_LEMOTE_FL2E: + loongson_uart_base = LOONGSON_PCIIO_BASE + 0x3f8; + break; + case MACH_LEMOTE_FL2F: + case MACH_LEMOTE_LL2F: + loongson_uart_base = LOONGSON_PCIIO_BASE + 0x2f8; + break; + case MACH_LEMOTE_ML2F7: + case MACH_LEMOTE_YL2F89: + case MACH_DEXXON_GDIUM2F10: + case MACH_LEMOTE_NAS: + default: + /* The CPU provided serial port */ + loongson_uart_base = LOONGSON_LIO1_BASE + 0x3f8; + break; + } + + _loongson_uart_base = + (unsigned long)ioremap_nocache(loongson_uart_base, 8); +} |