board/Marvell/common/serial.c

   1 /*
   2  * (C) Copyright 2001
   3  * Josh Huber <huber@mclx.com>, Mission Critical Linux, Inc.
   4  *
   5  * modified for marvell db64360 eval board by
   6  * Ingo Assmus <ingo.assmus@keymile.com>
   7  *
   8  * See file CREDITS for list of people who contributed to this
   9  * project.
  10  *
  11  * This program is free software; you can redistribute it and/or
  12  * modify it under the terms of the GNU General Public License as
  13  * published by the Free Software Foundation; either version 2 of
  14  * the License, or (at your option) any later version.
  15  *
  16  * This program is distributed in the hope that it will be useful,
  17  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  18  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19  * GNU General Public License for more details.
  20  *
  21  * You should have received a copy of the GNU General Public License
  22  * along with this program; if not, write to the Free Software
  23  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  24  * MA 02111-1307 USA
  25  */
  26
  27 /*
  28  * serial.c - serial support for the gal ev board
  29  */
  30
  31 /* supports both the 16650 duart and the MPSC */
  32
  33 #include <common.h>
  34 #include <command.h>
  35 #include "../include/memory.h"
  36 #include "serial.h"
  37
  38 #ifdef CONFIG_DB64360
  39 #include "../db64360/mpsc.h"
  40 #endif
  41
  42 #ifdef CONFIG_DB64460
  43 #include "../db64460/mpsc.h"
  44 #endif
  45
  46 #include "ns16550.h"
  47
  48 #ifdef CONFIG_MPSC
  49
  50
  51 int serial_init (void)
  52 {
  53         DECLARE_GLOBAL_DATA_PTR;
  54
  55 #if (defined CFG_INIT_CHAN1) || (defined CFG_INIT_CHAN2)
  56         int clock_divisor = 230400 / gd->baudrate;
  57 #endif
  58
  59         mpsc_init (gd->baudrate);
  60
  61         /* init the DUART chans so that KGDB in the kernel can use them */
  62 #ifdef CFG_INIT_CHAN1
  63         NS16550_reinit (COM_PORTS[0], clock_divisor);
  64 #endif
  65 #ifdef CFG_INIT_CHAN2
  66         NS16550_reinit (COM_PORTS[1], clock_divisor);
  67 #endif
  68         return (0);
  69 }
  70
  71 void serial_putc (const char c)
  72 {
  73         if (c == '\n')
  74                 mpsc_putchar ('\r');
  75
  76         mpsc_putchar (c);
  77 }
  78
  79 int serial_getc (void)
  80 {
  81         return mpsc_getchar ();
  82 }
  83
  84 int serial_tstc (void)
  85 {
  86         return mpsc_test_char ();
  87 }
  88
  89 void serial_setbrg (void)
  90 {
  91         DECLARE_GLOBAL_DATA_PTR;
  92
  93         galbrg_set_baudrate (CONFIG_MPSC_PORT, gd->baudrate);
  94 }
  95
  96 #else  /* ! CONFIG_MPSC */
  97
  98 int serial_init (void)
  99 {
 100         DECLARE_GLOBAL_DATA_PTR;
 101
 102         int clock_divisor = 230400 / gd->baudrate;
 103
 104 #ifdef CFG_INIT_CHAN1
 105         (void) NS16550_init (0, clock_divisor);
 106 #endif
 107 #ifdef CFG_INIT_CHAN2
 108         (void) NS16550_init (1, clock_divisor);
 109 #endif
 110         return (0);
 111 }
 112
 113 void 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 serial_getc (void)
 122 {
 123         return NS16550_getc (COM_PORTS[CFG_DUART_CHAN]);
 124 }
 125
 126 int serial_tstc (void)
 127 {
 128         return NS16550_tstc (COM_PORTS[CFG_DUART_CHAN]);
 129 }
 130
 131 void serial_setbrg (void)
 132 {
 133         DECLARE_GLOBAL_DATA_PTR;
 134
 135         int clock_divisor = 230400 / gd->baudrate;
 136
 137 #ifdef CFG_INIT_CHAN1
 138         NS16550_reinit (COM_PORTS[0], clock_divisor);
 139 #endif
 140 #ifdef CFG_INIT_CHAN2
 141         NS16550_reinit (COM_PORTS[1], clock_divisor);
 142 #endif
 143 }
 144
 145 #endif /* CONFIG_MPSC */
 146
 147 void serial_puts (const char *s)
 148 {
 149         while (*s) {
 150                 serial_putc (*s++);
 151         }
 152 }
 153
 154 #if (CONFIG_COMMANDS & CFG_CMD_KGDB)
 155 void kgdb_serial_init (void)
 156 {
 157 }
 158
 159 void putDebugChar (int c)
 160 {
 161         serial_putc (c);
 162 }
 163
 164 void putDebugStr (const char *str)
 165 {
 166         serial_puts (str);
 167 }
 168
 169 int getDebugChar (void)
 170 {
 171         return serial_getc ();
 172 }
 173
 174 void kgdb_interruptible (int yes)
 175 {
 176         return;
 177 }
 178 #endif /* CFG_CMD_KGDB */