board/evb64260/serial.c

   1 /*
   2  * (C) Copyright 2001
   3  * Josh Huber <huber@mclx.com>, Mission Critical Linux, Inc.
   4  *
   5  * See file CREDITS for list of people who contributed to this
   6  * project.
   7  *
   8  * This program is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU General Public License as
  10  * published by the Free Software Foundation; either version 2 of
  11  * the License, or (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program; if not, write to the Free Software
  20  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  21  * MA 02111-1307 USA
  22  */
  23
  24 /*
  25  * serial.c - serial support for the gal ev board
  26  */
  27
  28 /* supports both the 16650 duart and the MPSC */
  29
  30 #include <common.h>
  31 #include <command.h>
  32 #include <galileo/memory.h>
  33
  34 #if (defined CFG_INIT_CHAN1) || (defined CFG_INIT_CHAN2)
  35 #include <ns16550.h>
  36 #endif
  37
  38 #include "serial.h"
  39
  40 #include "mpsc.h"
  41
  42 DECLARE_GLOBAL_DATA_PTR;
  43
  44 #if (defined CFG_INIT_CHAN1) || (defined CFG_INIT_CHAN2)
  45 const NS16550_t COM_PORTS[] = { (NS16550_t) CFG_NS16550_COM1,
  46                                 (NS16550_t) CFG_NS16550_COM2 };
  47 #endif
  48
  49 #ifdef CONFIG_MPSC
  50
  51 int serial_init (void)
  52 {
  53 #if (defined CFG_INIT_CHAN1) || (defined CFG_INIT_CHAN2)
  54         int clock_divisor = CFG_NS16550_CLK / 16 / gd->baudrate;
  55 #endif
  56
  57         mpsc_init(gd->baudrate);
  58
  59         /* init the DUART chans so that KGDB in the kernel can use them */
  60 #ifdef CFG_INIT_CHAN1
  61         NS16550_reinit(COM_PORTS[0], clock_divisor);
  62 #endif
  63 #ifdef CFG_INIT_CHAN2
  64         NS16550_reinit(COM_PORTS[1], clock_divisor);
  65 #endif
  66         return (0);
  67 }
  68
  69 void
  70 serial_putc(const char c)
  71 {
  72         if (c == '\n')
  73                 mpsc_putchar('\r');
  74
  75         mpsc_putchar(c);
  76 }
  77
  78 int
  79 serial_getc(void)
  80 {
  81         return mpsc_getchar();
  82 }
  83
  84 int
  85 serial_tstc(void)
  86 {
  87         return mpsc_test_char();
  88 }
  89
  90 void
  91 serial_setbrg (void)
  92 {
  93         galbrg_set_baudrate(CONFIG_MPSC_PORT, gd->baudrate);
  94 }
  95
  96 #else /* ! CONFIG_MPSC */
  97
  98 int serial_init (void)
  99 {
 100         int clock_divisor = CFG_NS16550_CLK / 16 / gd->baudrate;
 101
 102 #ifdef CFG_INIT_CHAN1
 103         (void)NS16550_init(COM_PORTS[0], clock_divisor);
 104 #endif
 105 #ifdef CFG_INIT_CHAN2
 106         (void)NS16550_init(COM_PORTS[1], clock_divisor);
 107 #endif
 108
 109         return (0);
 110 }
 111
 112 void
 113 serial_putc(const char c)
 114 {
 115         if (c == '\n')
 116                 NS16550_putc(COM_PORTS[CFG_DUART_CHAN], '\r');
 117
 118         NS16550_putc(COM_PORTS[CFG_DUART_CHAN], c);
 119 }
 120
 121 int
 122 serial_getc(void)
 123 {
 124         return NS16550_getc(COM_PORTS[CFG_DUART_CHAN]);
 125 }
 126
 127 int
 128 serial_tstc(void)
 129 {
 130         return NS16550_tstc(COM_PORTS[CFG_DUART_CHAN]);
 131 }
 132
 133 void
 134 serial_setbrg (void)
 135 {
 136         int clock_divisor = CFG_NS16550_CLK / 16 / gd->baudrate;
 137
 138 #ifdef CFG_INIT_CHAN1
 139         NS16550_reinit(COM_PORTS[0], clock_divisor);
 140 #endif
 141 #ifdef CFG_INIT_CHAN2
 142         NS16550_reinit(COM_PORTS[1], clock_divisor);
 143 #endif
 144 }
 145
 146 #endif /* CONFIG_MPSC */
 147
 148 void
 149 serial_puts (const char *s)
 150 {
 151         while (*s) {
 152                 serial_putc (*s++);
 153         }
 154 }
 155
 156 #if defined(CONFIG_CMD_KGDB)
 157 void
 158 kgdb_serial_init(void)
 159 {
 160 }
 161
 162 void
 163 putDebugChar (int c)
 164 {
 165         serial_putc (c);
 166 }
 167
 168 void
 169 putDebugStr (const char *str)
 170 {
 171         serial_puts (str);
 172 }
 173
 174 int
 175 getDebugChar (void)
 176 {
 177         return serial_getc();
 178 }
 179
 180 void
 181 kgdb_interruptible (int yes)
 182 {
 183         return;
 184 }
 185 #endif