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 */
24 /*
25 * serial.c - serial support for the gal ev board
26 */
28 /* supports both the 16650 duart and the MPSC */
30 #include <common.h>
31 #include <command.h>
32 #include <galileo/memory.h>
33 #include <serial.h>
34 #include <linux/compiler.h>
36 #if (defined CONFIG_SYS_INIT_CHAN1) || (defined CONFIG_SYS_INIT_CHAN2)
37 #include <ns16550.h>
38 #endif
40 #include "serial.h"
42 #include "mpsc.h"
44 DECLARE_GLOBAL_DATA_PTR;
46 #if (defined CONFIG_SYS_INIT_CHAN1) || (defined CONFIG_SYS_INIT_CHAN2)
47 const NS16550_t COM_PORTS[] = { (NS16550_t) CONFIG_SYS_NS16550_COM1,
48 (NS16550_t) CONFIG_SYS_NS16550_COM2 };
49 #endif
51 #ifdef CONFIG_MPSC
53 static int evb64260_serial_init(void)
54 {
55 #if (defined CONFIG_SYS_INIT_CHAN1) || (defined CONFIG_SYS_INIT_CHAN2)
56 int clock_divisor = CONFIG_SYS_NS16550_CLK / 16 / gd->baudrate;
57 #endif
59 mpsc_init(gd->baudrate);
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 }
71 static void evb64260_serial_putc(const char c)
72 {
73 if (c == '\n')
74 mpsc_putchar('\r');
76 mpsc_putchar(c);
77 }
79 static int evb64260_serial_getc(void)
80 {
81 return mpsc_getchar();
82 }
84 static int evb64260_serial_tstc(void)
85 {
86 return mpsc_test_char();
87 }
89 static void evb64260_serial_setbrg(void)
90 {
91 galbrg_set_baudrate(CONFIG_MPSC_PORT, gd->baudrate);
92 }
94 #else /* ! CONFIG_MPSC */
96 static int evb64260_serial_init(void)
97 {
98 int clock_divisor = CONFIG_SYS_NS16550_CLK / 16 / gd->baudrate;
100 #ifdef CONFIG_SYS_INIT_CHAN1
101 (void)NS16550_init(COM_PORTS[0], clock_divisor);
102 #endif
103 #ifdef CONFIG_SYS_INIT_CHAN2
104 (void)NS16550_init(COM_PORTS[1], clock_divisor);
105 #endif
107 return (0);
108 }
110 static void evb64260_serial_putc(const char c)
111 {
112 if (c == '\n')
113 NS16550_putc(COM_PORTS[CONFIG_SYS_DUART_CHAN], '\r');
115 NS16550_putc(COM_PORTS[CONFIG_SYS_DUART_CHAN], c);
116 }
118 static int evb64260_serial_getc(void)
119 {
120 return NS16550_getc(COM_PORTS[CONFIG_SYS_DUART_CHAN]);
121 }
123 static int evb64260_serial_tstc(void)
124 {
125 return NS16550_tstc(COM_PORTS[CONFIG_SYS_DUART_CHAN]);
126 }
128 static void evb64260_serial_setbrg(void)
129 {
130 int clock_divisor = CONFIG_SYS_NS16550_CLK / 16 / gd->baudrate;
132 #ifdef CONFIG_SYS_INIT_CHAN1
133 NS16550_reinit(COM_PORTS[0], clock_divisor);
134 #endif
135 #ifdef CONFIG_SYS_INIT_CHAN2
136 NS16550_reinit(COM_PORTS[1], clock_divisor);
137 #endif
138 }
140 #endif /* CONFIG_MPSC */
142 static struct serial_device evb64260_serial_drv = {
143 .name = "evb64260_serial",
144 .start = evb64260_serial_init,
145 .stop = NULL,
146 .setbrg = evb64260_serial_setbrg,
147 .putc = evb64260_serial_putc,
148 .puts = default_serial_puts,
149 .getc = evb64260_serial_getc,
150 .tstc = evb64260_serial_tstc,
151 };
153 void evb64260_serial_initialize(void)
154 {
155 serial_register(&evb64260_serial_drv);
156 }
158 __weak struct serial_device *default_serial_console(void)
159 {
160 return &evb64260_serial_drv;
161 }
163 #if defined(CONFIG_CMD_KGDB)
164 void
165 kgdb_serial_init(void)
166 {
167 }
169 void
170 putDebugChar (int c)
171 {
172 serial_putc (c);
173 }
175 void
176 putDebugStr (const char *str)
177 {
178 serial_puts (str);
179 }
181 int
182 getDebugChar (void)
183 {
184 return serial_getc();
185 }
187 void
188 kgdb_interruptible (int yes)
189 {
190 return;
191 }
192 #endif