target/linux/lantiq/image/lzma-loader/src/board-ralink.c

   1 /*
   2  * Arch specific code for Ralink based boards
   3  *
   4  * Copyright (C) 2013 John Crispin <blogic@openwrt.org>
   5  *
   6  * This program is free software; you can redistribute it and/or modify it
   7  * under the terms of the GNU General Public License version 2 as published
   8  * by the Free Software Foundation.
   9  */
  10
  11 #include <stddef.h>
  12 #include "config.h"
  13
  14 #define READREG(r)              *(volatile unsigned int *)(r)
  15 #define WRITEREG(r,v)           *(volatile unsigned int *)(r) = v
  16
  17 #define KSEG1ADDR(_x)           (((_x) & 0x1fffffff) | 0xa0000000)
  18
  19 #ifdef CONFIG_SOC_RT288X
  20 #define UART_BASE               0xb0300c00
  21 #else
  22 #define UART_BASE               0xb0000c00
  23 #endif
  24
  25 #define UART_TX                 1
  26 #define UART_LSR                7
  27
  28 #define UART_LSR_THRE           0x20
  29
  30 #define UART_READ(r)            READREG(UART_BASE + 4 * (r))
  31 #define UART_WRITE(r,v)         WRITEREG(UART_BASE + 4 * (r), (v))
  32
  33 void board_putc(int ch)
  34 {
  35         while (((UART_READ(UART_LSR)) & UART_LSR_THRE) == 0);
  36         UART_WRITE(UART_TX, ch);
  37         while (((UART_READ(UART_LSR)) & UART_LSR_THRE) == 0);
  38 }
  39
  40 void board_init(void)
  41 {
  42 }