arch/mips/loongson/common/uart_base.c

   1 /*
   2  * Copyright (C) 2009 Lemote Inc.
   3  * Author: Wu Zhangjin, wuzhangjin@gmail.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 /* raw */
  17 unsigned long loongson_uart_base[MAX_UARTS] = {};
  18 /* ioremapped */
  19 unsigned long _loongson_uart_base[MAX_UARTS] = {};
  20
  21 EXPORT_SYMBOL(loongson_uart_base);
  22 EXPORT_SYMBOL(_loongson_uart_base);
  23
  24 void prom_init_loongson_uart_base(void)
  25 {
  26         switch (mips_machtype) {
  27         case MACH_LOONGSON_GENERIC:
  28                 /* The CPU provided serial port (CPU) */
  29                 loongson_uart_base[0] = LOONGSON_REG_BASE + 0x1e0;
  30                 break;
  31         case MACH_LEMOTE_FL2E:
  32                 loongson_uart_base[0] = LOONGSON_PCIIO_BASE + 0x3f8;
  33                 break;
  34         case MACH_LEMOTE_FL2F:
  35         case MACH_LEMOTE_LL2F:
  36                 loongson_uart_base[0] = LOONGSON_PCIIO_BASE + 0x2f8;
  37                 break;
  38         case MACH_LEMOTE_ML2F7:
  39         case MACH_LEMOTE_YL2F89:
  40         case MACH_DEXXON_GDIUM2F10:
  41         case MACH_LEMOTE_NAS:
  42         default:
  43                 /* The CPU provided serial port (LPC) */
  44                 loongson_uart_base[0] = LOONGSON_LIO1_BASE + 0x3f8;
  45                 break;
  46         }
  47
  48         _loongson_uart_base[0] =
  49                 (unsigned long)ioremap_nocache(loongson_uart_base[0], 8);
  50 }