arch/mips/loongson2ef/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 #include <asm/setup.h>
  10
  11 #include <loongson.h>
  12
  13 /* raw */
  14 unsigned long loongson_uart_base;
  15 /* ioremapped */
  16 unsigned long _loongson_uart_base;
  17
  18 EXPORT_SYMBOL(loongson_uart_base);
  19 EXPORT_SYMBOL(_loongson_uart_base);
  20
  21 void prom_init_loongson_uart_base(void)
  22 {
  23         switch (mips_machtype) {
  24         case MACH_LEMOTE_FL2E:
  25                 loongson_uart_base = LOONGSON_PCIIO_BASE + 0x3f8;
  26                 break;
  27         case MACH_LEMOTE_FL2F:
  28         case MACH_LEMOTE_LL2F:
  29                 loongson_uart_base = LOONGSON_PCIIO_BASE + 0x2f8;
  30                 break;
  31         case MACH_LEMOTE_ML2F7:
  32         case MACH_LEMOTE_YL2F89:
  33         case MACH_DEXXON_GDIUM2F10:
  34         case MACH_LEMOTE_NAS:
  35         default:
  36                 /* The CPU provided serial port (LPC) */
  37                 loongson_uart_base = LOONGSON_LIO1_BASE + 0x3f8;
  38                 break;
  39         }
  40
  41         _loongson_uart_base = TO_UNCAC(loongson_uart_base);
  42         setup_8250_early_printk_port(_loongson_uart_base, 0, 1024);
  43 }