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 DECLARE_GLOBAL_DATA_PTR;
  49
  50 #ifdef CONFIG_MPSC
  51
  52
  53 int serial_init (void)
  54 {
  55 #if (defined CONFIG_SYS_INIT_CHAN1) || (defined CONFIG_SYS_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 CONFIG_SYS_INIT_CHAN1
  63         NS16550_reinit (COM_PORTS[0], clock_divisor);
  64 #endif
  65 #ifdef CONFIG_SYS_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         galbrg_set_baudrate (CONFIG_MPSC_PORT, gd->baudrate);
  92 }
  93
  94 #else  /* ! CONFIG_MPSC */
  95
  96 int serial_init (void)
  97 {
  98         int clock_divisor = 230400 / gd->baudrate;
  99
 100 #ifdef CONFIG_SYS_INIT_CHAN1
 101         (void) NS16550_init (0, clock_divisor);
 102 #endif
 103 #ifdef CONFIG_SYS_INIT_CHAN2
 104         (void) NS16550_init (1, clock_divisor);
 105 #endif
 106         return (0);
 107 }
 108
 109 void serial_putc (const char c)
 110 {
 111         if (c == '\n')
 112                 NS16550_putc (COM_PORTS[CONFIG_SYS_DUART_CHAN], '\r');
 113
 114         NS16550_putc (COM_PORTS[CONFIG_SYS_DUART_CHAN], c);
 115 }
 116
 117 int serial_getc (void)
 118 {
 119         return NS16550_getc (COM_PORTS[CONFIG_SYS_DUART_CHAN]);
 120 }
 121
 122 int serial_tstc (void)
 123 {
 124         return NS16550_tstc (COM_PORTS[CONFIG_SYS_DUART_CHAN]);
 125 }
 126
 127 void serial_setbrg (void)
 128 {
 129         int clock_divisor = 230400 / gd->baudrate;
 130
 131 #ifdef CONFIG_SYS_INIT_CHAN1
 132         NS16550_reinit (COM_PORTS[0], clock_divisor);
 133 #endif
 134 #ifdef CONFIG_SYS_INIT_CHAN2
 135         NS16550_reinit (COM_PORTS[1], clock_divisor);
 136 #endif
 137 }
 138
 139 #endif /* CONFIG_MPSC */
 140
 141 void serial_puts (const char *s)
 142 {
 143         while (*s) {
 144                 serial_putc (*s++);
 145         }
 146 }
 147
 148 #if defined(CONFIG_CMD_KGDB)
 149 void kgdb_serial_init (void)
 150 {
 151 }
 152
 153 void putDebugChar (int c)
 154 {
 155         serial_putc (c);
 156 }
 157
 158 void putDebugStr (const char *str)
 159 {
 160         serial_puts (str);
 161 }
 162
 163 int getDebugChar (void)
 164 {
 165         return serial_getc ();
 166 }
 167
 168 void kgdb_interruptible (int yes)
 169 {
 170         return;
 171 }
 172 #endif