LXR uboot/board/xilinx/ml300/serial.c

   1/*
   2 *     Author: Xilinx, Inc.
   3 *
   4 *
   5 *     This program is free software; you can redistribute it and/or modify it
   6 *     under the terms of the GNU General Public License as published by the
   7 *     Free Software Foundation; either version 2 of the License, or (at your
   8 *     option) any later version.
   9 *
  10 *
  11 *     XILINX IS PROVIDING THIS DESIGN, CODE, OR INFORMATION "AS IS" AS A
  12 *     COURTESY TO YOU. BY PROVIDING THIS DESIGN, CODE, OR INFORMATION AS
  13 *     ONE POSSIBLE IMPLEMENTATION OF THIS FEATURE, APPLICATION OR STANDARD,
  14 *     XILINX IS MAKING NO REPRESENTATION THAT THIS IMPLEMENTATION IS FREE
  15 *     FROM ANY CLAIMS OF INFRINGEMENT, AND YOU ARE RESPONSIBLE FOR OBTAINING
  16 *     ANY THIRD PARTY RIGHTS YOU MAY REQUIRE FOR YOUR IMPLEMENTATION.
  17 *     XILINX EXPRESSLY DISCLAIMS ANY WARRANTY WHATSOEVER WITH RESPECT TO
  18 *     THE ADEQUACY OF THE IMPLEMENTATION, INCLUDING BUT NOT LIMITED TO ANY
  19 *     WARRANTIES OR REPRESENTATIONS THAT THIS IMPLEMENTATION IS FREE FROM
  20 *     CLAIMS OF INFRINGEMENT, IMPLIED WARRANTIES OF MERCHANTABILITY AND
  21 *     FITNESS FOR A PARTICULAR PURPOSE.
  22 *
  23 *
  24 *     Xilinx hardware products are not intended for use in life support
  25 *     appliances, devices, or systems. Use in such applications is
  26 *     expressly prohibited.
  27 *
  28 *
  29 *     (c) Copyright 2002-2004 Xilinx Inc.
  30 *     All rights reserved.
  31 *
  32 *
  33 *     You should have received a copy of the GNU General Public License along
  34 *     with this program; if not, write to the Free Software Foundation, Inc.,
  35 *     675 Mass Ave, Cambridge, MA 02139, USA.
  36 *
  37 */
  38
  39#include <common.h>
  40#include <asm/u-boot.h>
  41#include <asm/processor.h>
  42#include <command.h>
  43#include <config.h>
  44
  45DECLARE_GLOBAL_DATA_PTR;
  46
  47#define USE_CHAN1 \
  48        ((defined XPAR_UARTNS550_0_BASEADDR) && (defined CONFIG_SYS_INIT_CHAN1))
  49#define USE_CHAN2 \
  50        ((defined XPAR_UARTNS550_1_BASEADDR) && (defined CONFIG_SYS_INIT_CHAN2))
  51
  52#if USE_CHAN1
  53#include <ns16550.h>
  54#endif
  55
  56#if USE_CHAN1
  57const NS16550_t COM_PORTS[] = { (NS16550_t) (XPAR_UARTNS550_0_BASEADDR + 3)
  58#if USE_CHAN2
  59            , (NS16550_t) (XPAR_UARTNS550_1_BASEADDR + 3)
  60#endif
  61};
  62#endif
  63
  64int
  65serial_init(void)
  66{
  67#if USE_CHAN1
  68        int clock_divisor;
  69
  70        clock_divisor = XPAR_UARTNS550_0_CLOCK_FREQ_HZ / 16 / gd->baudrate;
  71        (void) NS16550_init(COM_PORTS[0], clock_divisor);
  72#if USE_CHAN2
  73        clock_divisor = XPAR_UARTNS550_1_CLOCK_FREQ_HZ / 16 / gd->baudrate;
  74        (void) NS16550_init(COM_PORTS[1], clock_divisor);
  75#endif
  76#endif
  77        return 0;
  78
  79}
  80
  81void
  82serial_putc(const char c)
  83{
  84        if (c == '\n')
  85                NS16550_putc(COM_PORTS[CONFIG_SYS_DUART_CHAN], '\r');
  86
  87        NS16550_putc(COM_PORTS[CONFIG_SYS_DUART_CHAN], c);
  88}
  89
  90int
  91serial_getc(void)
  92{
  93        return NS16550_getc(COM_PORTS[CONFIG_SYS_DUART_CHAN]);
  94}
  95
  96int
  97serial_tstc(void)
  98{
  99        return NS16550_tstc(COM_PORTS[CONFIG_SYS_DUART_CHAN]);
 100}
 101
 102void
 103serial_setbrg(void)
 104{
 105#if USE_CHAN1
 106        int clock_divisor;
 107
 108        clock_divisor = XPAR_UARTNS550_0_CLOCK_FREQ_HZ / 16 / gd->baudrate;
 109        NS16550_reinit(COM_PORTS[0], clock_divisor);
 110#if USE_CHAN2
 111        clock_divisor = XPAR_UARTNS550_1_CLOCK_FREQ_HZ / 16 / gd->baudrate;
 112        NS16550_reinit(COM_PORTS[1], clock_divisor);
 113#endif
 114#endif
 115}
 116
 117void
 118serial_puts(const char *s)
 119{
 120        while (*s) {
 121                serial_putc(*s++);
 122        }
 123}
 124
 125#if defined(CONFIG_CMD_KGDB)
 126void
 127kgdb_serial_init(void)
 128{
 129}
 130
 131void
 132putDebugChar(int c)
 133{
 134        serial_putc(c);
 135}
 136
 137void
 138putDebugStr(const char *str)
 139{
 140        serial_puts(str);
 141}
 142
 143int
 144getDebugChar(void)
 145{
 146        return serial_getc();
 147}
 148
 149void
 150kgdb_interruptible(int yes)
 151{
 152        return;
 153}
 154#endif
 155