arch/mips/loongson/common/uart_base.c

   1 /*
   2  * Copyright (C) 2009 Lemote Inc.
   3  * Author: Wu Zhangjin, wuzj@lemote.com
   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
  11 #include <linux/module.h>
  12 #include <asm/bootinfo.h>
  13
  14 #include <loongson.h>
  15
  16 unsigned long __maybe_unused _loongson_uart_base;
  17 EXPORT_SYMBOL(_loongson_uart_base);
  18
  19 unsigned long __maybe_unused uart8250_base[] = {
  20         [MACH_LOONGSON_UNKNOWN] 0,
  21         [MACH_LEMOTE_FL2E]      (LOONGSON_PCIIO_BASE + 0x3f8),
  22         [MACH_LEMOTE_FL2F]      (LOONGSON_PCIIO_BASE + 0x2f8),
  23         [MACH_LEMOTE_ML2F7]     (LOONGSON_LIO1_BASE + 0x3f8),
  24         [MACH_LEMOTE_YL2F89]    (LOONGSON_LIO1_BASE + 0x3f8),
  25         [MACH_DEXXON_GDIUM2F10] (LOONGSON_LIO1_BASE + 0x3f8),
  26         [MACH_LEMOTE_NAS]       (LOONGSON_LIO1_BASE + 0x3f8),
  27         [MACH_LEMOTE_LL2F]      (LOONGSON_PCIIO_BASE + 0x2f8),
  28         [MACH_LOONGSON_END]     0,
  29 };
  30 EXPORT_SYMBOL(uart8250_base);
  31
  32 void __maybe_unused prom_init_uart_base(void)
  33 {
  34         _loongson_uart_base =
  35                 (unsigned long)ioremap_nocache(uart8250_base[mips_machtype], 8);
  36 }