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

   1 /*
   2  * Arch specific code for ramips based boards
   3  *
   4  * Copyright (C) 2013 John Crispin <blogic@openwrt.org>
   5  * Copyright (C) 2018 Tobias Schramm <tobleminer@gmail.com>
   6  * Copyright (C) 2023 Antonio Vázquez <antoniovazquezblanco@gmail.com>
   7  *
   8  * This program is free software; you can redistribute it and/or modify it
   9  * under the terms of the GNU General Public License version 2 as published
  10  * by the Free Software Foundation.
  11  */
  12
  13 #include <stdint.h>
  14
  15 #if defined(SOC_MT7620) || defined(SOC_RT3883)
  16 #define UART_BASE                       0xb0000c00
  17 #define UART_THR                        (UART_BASE + 0x04)
  18 #define UART_LSR                        (UART_BASE + 0x1c)
  19 #define UART_LSR_THRE_MASK      0x40
  20 #elif defined(SOC_MT7621)
  21 #define UART_BASE                       0xbe000c00
  22 #define UART_THR                        (UART_BASE + 0x00)
  23 #define UART_LSR                        (UART_BASE + 0x14)
  24 #define UART_LSR_THRE_MASK      0x20
  25 #elif defined(SOC_RT305X)
  26 #define UART_BASE                       0x10000500
  27 #define UART_THR                        (UART_BASE + 0x04)
  28 #define UART_LSR                        (UART_BASE + 0x1c)
  29 #define UART_LSR_THRE_MASK      0x20
  30 #else
  31 #error "Unsupported SOC..."
  32 #endif
  33
  34 // Helper functions
  35 #define READREG(r)              (*(volatile uint32_t *)(r))
  36 #define WRITEREG(r,v)   (*(volatile uint32_t *)(r)) = v
  37
  38
  39 void board_init(void)
  40 {
  41 }
  42
  43 void board_putc(int ch)
  44 {
  45         while ((READREG(UART_LSR) & UART_LSR_THRE_MASK) == 0);
  46         WRITEREG(UART_THR, ch);
  47         while ((READREG(UART_LSR) & UART_LSR_THRE_MASK) == 0);
  48 }