arch/arm/mach-tegra/include/mach/uncompress.h

   1 /*
   2  * arch/arm/mach-tegra/include/mach/uncompress.h
   3  *
   4  * Copyright (C) 2010 Google, Inc.
   5  *
   6  * Author:
   7  *      Colin Cross <ccross@google.com>
   8  *      Erik Gilling <konkers@google.com>
   9  *
  10  * This software is licensed under the terms of the GNU General Public
  11  * License version 2, as published by the Free Software Foundation, and
  12  * may be copied, distributed, and modified under those terms.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  * GNU General Public License for more details.
  18  *
  19  */
  20
  21 #ifndef __MACH_TEGRA_UNCOMPRESS_H
  22 #define __MACH_TEGRA_UNCOMPRESS_H
  23
  24 #include <linux/types.h>
  25 #include <linux/serial_reg.h>
  26
  27 #include <mach/iomap.h>
  28
  29 static void putc(int c)
  30 {
  31         volatile u8 *uart = (volatile u8 *)TEGRA_DEBUG_UART_BASE;
  32         int shift = 2;
  33
  34         if (uart == NULL)
  35                 return;
  36
  37         while (!(uart[UART_LSR << shift] & UART_LSR_THRE))
  38                 barrier();
  39         uart[UART_TX << shift] = c;
  40 }
  41
  42 static inline void flush(void)
  43 {
  44 }
  45
  46 static inline void arch_decomp_setup(void)
  47 {
  48         volatile u8 *uart = (volatile u8 *)TEGRA_DEBUG_UART_BASE;
  49         int shift = 2;
  50
  51         if (uart == NULL)
  52                 return;
  53
  54         uart[UART_LCR << shift] |= UART_LCR_DLAB;
  55         uart[UART_DLL << shift] = 0x75;
  56         uart[UART_DLM << shift] = 0x0;
  57         uart[UART_LCR << shift] = 3;
  58 }
  59
  60 static inline void arch_decomp_wdog(void)
  61 {
  62 }
  63
  64 #endif