target/linux/ramips/image/lzma-loader/src/board-mt7621.c

   1 /*
   2  * Arch specific code for mt7621 based boards, based on code for Ralink boards
   3  *
   4  * Copyright (C) 2018 Tobias Schramm <tobleminer@gmail.com>
   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 <stdint.h>
  13 #include "config.h"
  14
  15 #define READREG(r)              *(volatile uint32_t *)(r)
  16 #define WRITEREG(r,v)           *(volatile uint32_t *)(r) = v
  17
  18 #define KSEG1ADDR(_x)           (((_x) & 0x1fffffff) | 0xa0000000)
  19
  20 #define UART_BASE               0xBE000C00
  21
  22 #define UART_TBR_OFFSET         0x00
  23 #define UART_LSR_OFFSET         0x14
  24
  25 #define UART_LSR_TEMT           (1 << 6)
  26
  27 #define UART_READ(r)            READREG(UART_BASE + (r))
  28 #define UART_WRITE(r,v)         WRITEREG(UART_BASE + (r), (v))
  29
  30 void board_putc(int ch)
  31 {
  32         while (((UART_READ(UART_LSR_OFFSET)) & UART_LSR_TEMT) == 0);
  33         UART_WRITE(UART_TBR_OFFSET, ch);
  34         while (((UART_READ(UART_LSR_OFFSET)) & UART_LSR_TEMT) == 0);
  35 }
  36
  37 void board_init(void)
  38 {
  39 }