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 <asm/u-boot.h>
  40 #include <asm/processor.h>
  41 #include <common.h>
  42 #include <command.h>
  43 #include <config.h>
  44
  45 DECLARE_GLOBAL_DATA_PTR;
  46
  47 #define USE_CHAN1 \
  48         ((defined XPAR_UARTNS550_0_BASEADDR) && (defined CFG_INIT_CHAN1))
  49 #define USE_CHAN2 \
  50         ((defined XPAR_UARTNS550_1_BASEADDR) && (defined CFG_INIT_CHAN2))
  51
  52 #if USE_CHAN1
  53 #include <ns16550.h>
  54 #endif
  55
  56 #if USE_CHAN1
  57 const 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
  64 int
  65 serial_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
  81 void
  82 serial_putc(const char c)
  83 {
  84         if (c == '\n')
  85                 NS16550_putc(COM_PORTS[CFG_DUART_CHAN], '\r');
  86
  87         NS16550_putc(COM_PORTS[CFG_DUART_CHAN], c);
  88 }
  89
  90 int
  91 serial_getc(void)
  92 {
  93         return NS16550_getc(COM_PORTS[CFG_DUART_CHAN]);
  94 }
  95
  96 int
  97 serial_tstc(void)
  98 {
  99         return NS16550_tstc(COM_PORTS[CFG_DUART_CHAN]);
 100 }
 101
 102 void
 103 serial_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
 117 void
 118 serial_puts(const char *s)
 119 {
 120         while (*s) {
 121                 serial_putc(*s++);
 122         }
 123 }
 124
 125 #if defined(CONFIG_CMD_KGDB)
 126 void
 127 kgdb_serial_init(void)
 128 {
 129 }
 130
 131 void
 132 putDebugChar(int c)
 133 {
 134         serial_putc(c);
 135 }
 136
 137 void
 138 putDebugStr(const char *str)
 139 {
 140         serial_puts(str);
 141 }
 142
 143 int
 144 getDebugChar(void)
 145 {
 146         return serial_getc();
 147 }
 148
 149 void
 150 kgdb_interruptible(int yes)
 151 {
 152         return;
 153 }
 154 #endif