target/linux/ath79/image/lzma-loader/src/board.c

   1 /*
   2  * LZMA compressed kernel loader for Atheros AR7XXX/AR9XXX based boards
   3  *
   4  * Copyright (C) 2011 Gabor Juhos <juhosg@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 #include "ar71xx_regs.h"
  14
  15 #define READREG(r)      *(volatile unsigned int *)(r)
  16 #define WRITEREG(r,v)   *(volatile unsigned int *)(r) = v
  17
  18 #define KSEG1ADDR(_x)   (((_x) & 0x1fffffff) | 0xa0000000)
  19
  20 #define UART_BASE       0xb8020000
  21
  22 #define UART_TX         0
  23 #define UART_LSR        5
  24
  25 #define UART_LSR_THRE   0x20
  26
  27 #define UART_READ(r)            READREG(UART_BASE + 4 * (r))
  28 #define UART_WRITE(r,v)         WRITEREG(UART_BASE + 4 * (r), (v))
  29
  30 void board_putc(int ch)
  31 {
  32         while (((UART_READ(UART_LSR)) & UART_LSR_THRE) == 0);
  33         UART_WRITE(UART_TX, ch);
  34         while (((UART_READ(UART_LSR)) & UART_LSR_THRE) == 0);
  35 }
  36
  37 #ifdef CONFIG_BOARD_TL_WR1043ND_V1
  38 static void tlwr1043nd_init(void)
  39 {
  40         unsigned int reg = KSEG1ADDR(AR71XX_RESET_BASE);
  41         unsigned int t;
  42
  43         t = READREG(reg + AR913X_RESET_REG_RESET_MODULE);
  44         t |= AR71XX_RESET_GE0_PHY;
  45         WRITEREG(reg + AR913X_RESET_REG_RESET_MODULE, t);
  46         /* flush write */
  47         t = READREG(reg + AR913X_RESET_REG_RESET_MODULE);
  48 }
  49 #else
  50 static inline void tlwr1043nd_init(void) {}
  51 #endif
  52
  53 void board_init(void)
  54 {
  55         tlwr1043nd_init();
  56 }