LXR linux/arch/mips/netlogic/common/earlycons.c

   1/*
   2 * Copyright 2003-2011 NetLogic Microsystems, Inc. (NetLogic). All rights
   3 * reserved.
   4 *
   5 * This software is available to you under a choice of one of two
   6 * licenses.  You may choose to be licensed under the terms of the GNU
   7 * General Public License (GPL) Version 2, available from the file
   8 * COPYING in the main directory of this source tree, or the NetLogic
   9 * license below:
  10 *
  11 * Redistribution and use in source and binary forms, with or without
  12 * modification, are permitted provided that the following conditions
  13 * are met:
  14 *
  15 * 1. Redistributions of source code must retain the above copyright
  16 *    notice, this list of conditions and the following disclaimer.
  17 * 2. Redistributions in binary form must reproduce the above copyright
  18 *    notice, this list of conditions and the following disclaimer in
  19 *    the documentation and/or other materials provided with the
  20 *    distribution.
  21 *
  22 * THIS SOFTWARE IS PROVIDED BY NETLOGIC ``AS IS'' AND ANY EXPRESS OR
  23 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
  24 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  25 * ARE DISCLAIMED. IN NO EVENT SHALL NETLOGIC OR CONTRIBUTORS BE LIABLE
  26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  27 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  28 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
  29 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
  30 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
  31 * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
  32 * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  33 */
  34
  35#include <linux/types.h>
  36#include <linux/serial_reg.h>
  37
  38#include <asm/mipsregs.h>
  39#include <asm/setup.h>
  40#include <asm/netlogic/haldefs.h>
  41#include <asm/netlogic/common.h>
  42
  43#if defined(CONFIG_CPU_XLP)
  44#include <asm/netlogic/xlp-hal/iomap.h>
  45#include <asm/netlogic/xlp-hal/xlp.h>
  46#include <asm/netlogic/xlp-hal/uart.h>
  47#elif defined(CONFIG_CPU_XLR)
  48#include <asm/netlogic/xlr/iomap.h>
  49#endif
  50
  51void prom_putchar(char c)
  52{
  53        uint64_t uartbase;
  54
  55#if defined(CONFIG_CPU_XLP)
  56        uartbase = nlm_get_uart_regbase(0, 0);
  57#elif defined(CONFIG_CPU_XLR)
  58        uartbase = nlm_mmio_base(NETLOGIC_IO_UART_0_OFFSET);
  59#endif
  60        while ((nlm_read_reg(uartbase, UART_LSR) & UART_LSR_THRE) == 0)
  61                ;
  62        nlm_write_reg(uartbase, UART_TX, c);
  63}
  64