arch/mips/loongson64/common/uart_base.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * Copyright (C) 2009 Lemote Inc.
   4  * Author: Wu Zhangjin, wuzhangjin@gmail.com
   5  */
   6
   7 #include <linux/export.h>
   8 #include <asm/bootinfo.h>
   9
  10 #include <loongson.h>
  11
  12 /* raw */
  13 unsigned long loongson_uart_base[MAX_UARTS] = {};
  14 /* ioremapped */
  15 unsigned long _loongson_uart_base[MAX_UARTS] = {};
  16
  17 EXPORT_SYMBOL(loongson_uart_base);
  18 EXPORT_SYMBOL(_loongson_uart_base);
  19
  20 void prom_init_loongson_uart_base(void)
  21 {
  22         switch (mips_machtype) {
  23         case MACH_LOONGSON_GENERIC:
  24                 /* The CPU provided serial port (CPU) */
  25                 loongson_uart_base[0] = LOONGSON_REG_BASE + 0x1e0;
  26                 break;
  27         case MACH_LEMOTE_FL2E:
  28                 loongson_uart_base[0] = LOONGSON_PCIIO_BASE + 0x3f8;
  29                 break;
  30         case MACH_LEMOTE_FL2F:
  31         case MACH_LEMOTE_LL2F:
  32                 loongson_uart_base[0] = LOONGSON_PCIIO_BASE + 0x2f8;
  33                 break;
  34         case MACH_LEMOTE_ML2F7:
  35         case MACH_LEMOTE_YL2F89:
  36         case MACH_DEXXON_GDIUM2F10:
  37         case MACH_LEMOTE_NAS:
  38         default:
  39                 /* The CPU provided serial port (LPC) */
  40                 loongson_uart_base[0] = LOONGSON_LIO1_BASE + 0x3f8;
  41                 break;
  42         }
  43
  44         _loongson_uart_base[0] =
  45                 (unsigned long)ioremap_nocache(loongson_uart_base[0], 8);
  46 }