diff options
| author | Wu Zhangjin <wuzhangjin@gmail.com> | 2009-11-06 11:35:34 +0100 |
|---|---|---|
| committer | Ralf Baechle <ralf@linux-mips.org> | 2009-12-17 02:57:09 +0100 |
| commit | a3ed495190ebe918f4584291ed8c76f1c97a84fd (patch) | |
| tree | 700cc7549624c08b38d6003d63a7bb514fe09605 /arch/mips/loongson/common/uart_base.c | |
| parent | MIPS: Loongson: Cleanup machtype support (diff) | |
| download | linux-a3ed495190ebe918f4584291ed8c76f1c97a84fd.tar.xz linux-a3ed495190ebe918f4584291ed8c76f1c97a84fd.zip | |
MIPS: Loongson: Cleanup the serial port support
To share the same kernel image amon different machines we have added the
machtype command line support.
In the old serial port implementation the UART base address is hardcoded as
a macro in machine.h which breaks with machtype, so change that to discover
the address dynamically. Also move the initialization of the UART base
address to uart_base.c to avoid remapping twice for early_printk.c and
serial.c.
Signed-off-by: Wu Zhangjin <wuzhangjin@gmail.com>
Cc: linux-mips@linux-mips.org
Patchwork: http://patchwork.linux-mips.org/patch/581/
Patchwork: http://patchwork.linux-mips.org/patch/682/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'arch/mips/loongson/common/uart_base.c')
| -rw-r--r-- | arch/mips/loongson/common/uart_base.c | 34 |
1 files changed, 34 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 000000000000..233c708fc120 --- /dev/null +++ b/arch/mips/loongson/common/uart_base.c @@ -0,0 +1,34 @@ +/* + * 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> + +unsigned long __maybe_unused _loongson_uart_base; +EXPORT_SYMBOL(_loongson_uart_base); + +unsigned long __maybe_unused uart8250_base[] = { + [MACH_LOONGSON_UNKNOWN] 0, + [MACH_LEMOTE_FL2E] (LOONGSON_PCIIO_BASE + 0x3f8), + [MACH_LEMOTE_FL2F] (LOONGSON_PCIIO_BASE + 0x2f8), + [MACH_LEMOTE_ML2F7] (LOONGSON_LIO1_BASE + 0x3f8), + [MACH_LEMOTE_YL2F89] (LOONGSON_LIO1_BASE + 0x3f8), + [MACH_DEXXON_GDIUM2F10] (LOONGSON_LIO1_BASE + 0x3f8), + [MACH_LOONGSON_END] 0, +}; +EXPORT_SYMBOL(uart8250_base); + +void __maybe_unused prom_init_uart_base(void) +{ + _loongson_uart_base = + (unsigned long)ioremap_nocache(uart8250_base[mips_machtype], 8); +} |