blob: 888fbc52a9efc918e06cd309d3c8ece2262c47de [file] [log] [blame]
wdenk7ac16102004-08-01 22:48:16 +00001/*
2 * (C) Copyright 2004
3 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
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#include <common.h>
25#include <serial.h>
Jean-Christophe PLAGNIOL-VILLARD2a7a0312009-05-16 12:14:54 +020026#include <stdio_dev.h>
Mike Frysinger078f2f12011-05-14 06:56:15 +000027#include <post.h>
28#include <linux/compiler.h>
wdenk7ac16102004-08-01 22:48:16 +000029
Wolfgang Denk6405a152006-03-31 18:32:53 +020030DECLARE_GLOBAL_DATA_PTR;
31
Gerlando Falauto34148d62011-11-18 06:49:11 +000032static struct serial_device *serial_devices;
33static struct serial_device *serial_current;
wdenk7ac16102004-08-01 22:48:16 +000034
Marek Vasutf6af0482012-09-12 17:49:58 +020035static void serial_null(void)
36{
37}
38
39#define serial_initfunc(name) \
40 void name(void) \
41 __attribute__((weak, alias("serial_null")));
42
Marek Vasut419d8942012-09-12 13:50:56 +020043serial_initfunc(mpc8xx_serial_initialize);
Marek Vasut3f085062012-09-12 20:02:05 +020044serial_initfunc(ns16550_serial_initialize);
Marek Vasutf3442012012-09-12 13:57:58 +020045serial_initfunc(pxa_serial_initialize);
Marek Vasutb3e48aa2012-09-12 16:01:16 +020046serial_initfunc(s3c24xx_serial_initialize);
Marek Vasut533e31e2012-09-12 19:39:57 +020047serial_initfunc(s5p_serial_initialize);
Tom Rini354531e2012-10-08 14:46:23 -070048serial_initfunc(zynq_serial_initalize);
Marek Vasut840b7242012-09-12 20:07:54 +020049serial_initfunc(bfin_serial_initialize);
Marek Vasut3862c4a2012-09-13 00:02:54 +020050serial_initfunc(bfin_jtag_initialize);
Marek Vasutf9bf9662012-09-12 19:50:18 +020051serial_initfunc(mpc512x_serial_initialize);
Marek Vasutd97fb5c2012-09-12 19:45:58 +020052serial_initfunc(uartlite_serial_initialize);
Marek Vasut01f9ea82012-09-13 01:16:50 +020053serial_initfunc(au1x00_serial_initialize);
Marek Vasut2a9d9352012-09-13 01:20:07 +020054serial_initfunc(asc_serial_initialize);
Marek Vasut76cb60d2012-09-13 01:20:59 +020055serial_initfunc(jz_serial_initialize);
Marek Vasut58698e72012-09-13 01:26:42 +020056serial_initfunc(mpc5xx_serial_initialize);
Marek Vasut80ee3db2012-09-13 01:29:31 +020057serial_initfunc(mpc8220_serial_initialize);
Marek Vasut18a47792012-09-13 01:34:16 +020058serial_initfunc(mpc8260_scc_serial_initialize);
59serial_initfunc(mpc8260_smc_serial_initialize);
Marek Vasut419d8942012-09-12 13:50:56 +020060
Mike Frysingerffadc822011-04-29 18:03:30 +000061void serial_register(struct serial_device *dev)
wdenk7ac16102004-08-01 22:48:16 +000062{
Wolfgang Denkd0813e52010-10-28 20:00:11 +020063#ifdef CONFIG_NEEDS_MANUAL_RELOC
Marek Vasutb46931d2012-09-07 14:35:31 +020064 dev->start += gd->reloc_off;
wdenk7ac16102004-08-01 22:48:16 +000065 dev->setbrg += gd->reloc_off;
66 dev->getc += gd->reloc_off;
67 dev->tstc += gd->reloc_off;
68 dev->putc += gd->reloc_off;
69 dev->puts += gd->reloc_off;
Peter Tyser9057cbf2009-09-21 11:20:36 -050070#endif
wdenk7ac16102004-08-01 22:48:16 +000071
72 dev->next = serial_devices;
73 serial_devices = dev;
wdenk7ac16102004-08-01 22:48:16 +000074}
75
Gerlando Falauto34148d62011-11-18 06:49:11 +000076void serial_initialize(void)
wdenk7ac16102004-08-01 22:48:16 +000077{
Marek Vasut419d8942012-09-12 13:50:56 +020078 mpc8xx_serial_initialize();
Marek Vasut3f085062012-09-12 20:02:05 +020079 ns16550_serial_initialize();
Marek Vasutf3442012012-09-12 13:57:58 +020080 pxa_serial_initialize();
Marek Vasutb3e48aa2012-09-12 16:01:16 +020081 s3c24xx_serial_initialize();
Marek Vasut533e31e2012-09-12 19:39:57 +020082 s5p_serial_initialize();
Marek Vasutf9bf9662012-09-12 19:50:18 +020083 mpc512x_serial_initialize();
Marek Vasut840b7242012-09-12 20:07:54 +020084 bfin_serial_initialize();
Marek Vasut3862c4a2012-09-13 00:02:54 +020085 bfin_jtag_initialize();
Marek Vasutd97fb5c2012-09-12 19:45:58 +020086 uartlite_serial_initialize();
Tom Rini354531e2012-10-08 14:46:23 -070087 zynq_serial_initalize();
Marek Vasut01f9ea82012-09-13 01:16:50 +020088 au1x00_serial_initialize();
Marek Vasut2a9d9352012-09-13 01:20:07 +020089 asc_serial_initialize();
Marek Vasut76cb60d2012-09-13 01:20:59 +020090 jz_serial_initialize();
Marek Vasut58698e72012-09-13 01:26:42 +020091 mpc5xx_serial_initialize();
Marek Vasut80ee3db2012-09-13 01:29:31 +020092 mpc8220_serial_initialize();
Marek Vasut18a47792012-09-13 01:34:16 +020093 mpc8260_scc_serial_initialize();
94 mpc8260_smc_serial_initialize();
Marek Vasut01f9ea82012-09-13 01:16:50 +020095
Gerlando Falauto34148d62011-11-18 06:49:11 +000096 serial_assign(default_serial_console()->name);
wdenk7ac16102004-08-01 22:48:16 +000097}
98
Gerlando Falauto34148d62011-11-18 06:49:11 +000099void serial_stdio_init(void)
wdenk7ac16102004-08-01 22:48:16 +0000100{
Jean-Christophe PLAGNIOL-VILLARD2a7a0312009-05-16 12:14:54 +0200101 struct stdio_dev dev;
wdenk7ac16102004-08-01 22:48:16 +0000102 struct serial_device *s = serial_devices;
103
wdenk8f08c5b2004-10-11 22:43:02 +0000104 while (s) {
Gerlando Falauto34148d62011-11-18 06:49:11 +0000105 memset(&dev, 0, sizeof(dev));
wdenk7ac16102004-08-01 22:48:16 +0000106
Gerlando Falauto34148d62011-11-18 06:49:11 +0000107 strcpy(dev.name, s->name);
wdenk7ac16102004-08-01 22:48:16 +0000108 dev.flags = DEV_FLAGS_OUTPUT | DEV_FLAGS_INPUT;
109
Marek Vasutb46931d2012-09-07 14:35:31 +0200110 dev.start = s->start;
111 dev.stop = s->stop;
wdenk7ac16102004-08-01 22:48:16 +0000112 dev.putc = s->putc;
113 dev.puts = s->puts;
114 dev.getc = s->getc;
115 dev.tstc = s->tstc;
116
Gerlando Falauto34148d62011-11-18 06:49:11 +0000117 stdio_register(&dev);
wdenk7ac16102004-08-01 22:48:16 +0000118
119 s = s->next;
120 }
121}
122
Gerlando Falauto92999582011-11-18 06:49:12 +0000123int serial_assign(const char *name)
wdenk7ac16102004-08-01 22:48:16 +0000124{
125 struct serial_device *s;
126
wdenk8f08c5b2004-10-11 22:43:02 +0000127 for (s = serial_devices; s; s = s->next) {
Gerlando Falauto34148d62011-11-18 06:49:11 +0000128 if (strcmp(s->name, name) == 0) {
wdenk7ac16102004-08-01 22:48:16 +0000129 serial_current = s;
130 return 0;
131 }
132 }
133
134 return 1;
135}
136
Gerlando Falauto34148d62011-11-18 06:49:11 +0000137void serial_reinit_all(void)
wdenk7ac16102004-08-01 22:48:16 +0000138{
139 struct serial_device *s;
140
Gerlando Falauto34148d62011-11-18 06:49:11 +0000141 for (s = serial_devices; s; s = s->next)
Marek Vasutb46931d2012-09-07 14:35:31 +0200142 s->start();
wdenk7ac16102004-08-01 22:48:16 +0000143}
144
Simon Glass8f4e6f12011-08-19 11:09:43 +0000145static struct serial_device *get_current(void)
wdenk7ac16102004-08-01 22:48:16 +0000146{
Simon Glass8f4e6f12011-08-19 11:09:43 +0000147 struct serial_device *dev;
148
wdenk8f08c5b2004-10-11 22:43:02 +0000149 if (!(gd->flags & GD_FLG_RELOC) || !serial_current) {
Simon Glass8f4e6f12011-08-19 11:09:43 +0000150 dev = default_serial_console();
wdenk8f08c5b2004-10-11 22:43:02 +0000151
Simon Glass8f4e6f12011-08-19 11:09:43 +0000152 /* We must have a console device */
153 if (!dev)
154 panic("Cannot find console");
155 } else
156 dev = serial_current;
157 return dev;
158}
wdenk7ac16102004-08-01 22:48:16 +0000159
Simon Glass8f4e6f12011-08-19 11:09:43 +0000160int serial_init(void)
161{
Marek Vasutb46931d2012-09-07 14:35:31 +0200162 return get_current()->start();
wdenk7ac16102004-08-01 22:48:16 +0000163}
164
Gerlando Falauto34148d62011-11-18 06:49:11 +0000165void serial_setbrg(void)
wdenk7ac16102004-08-01 22:48:16 +0000166{
Simon Glass8f4e6f12011-08-19 11:09:43 +0000167 get_current()->setbrg();
wdenk7ac16102004-08-01 22:48:16 +0000168}
169
Gerlando Falauto34148d62011-11-18 06:49:11 +0000170int serial_getc(void)
wdenk7ac16102004-08-01 22:48:16 +0000171{
Simon Glass8f4e6f12011-08-19 11:09:43 +0000172 return get_current()->getc();
wdenk7ac16102004-08-01 22:48:16 +0000173}
174
Gerlando Falauto34148d62011-11-18 06:49:11 +0000175int serial_tstc(void)
wdenk7ac16102004-08-01 22:48:16 +0000176{
Simon Glass8f4e6f12011-08-19 11:09:43 +0000177 return get_current()->tstc();
wdenk7ac16102004-08-01 22:48:16 +0000178}
179
Gerlando Falauto34148d62011-11-18 06:49:11 +0000180void serial_putc(const char c)
wdenk7ac16102004-08-01 22:48:16 +0000181{
Simon Glass8f4e6f12011-08-19 11:09:43 +0000182 get_current()->putc(c);
wdenk7ac16102004-08-01 22:48:16 +0000183}
184
Gerlando Falauto34148d62011-11-18 06:49:11 +0000185void serial_puts(const char *s)
wdenk7ac16102004-08-01 22:48:16 +0000186{
Simon Glass8f4e6f12011-08-19 11:09:43 +0000187 get_current()->puts(s);
wdenk7ac16102004-08-01 22:48:16 +0000188}
Mike Frysinger078f2f12011-05-14 06:56:15 +0000189
190#if CONFIG_POST & CONFIG_SYS_POST_UART
191static const int bauds[] = CONFIG_SYS_BAUDRATE_TABLE;
192
193/* Mark weak until post/cpu/.../uart.c migrate over */
194__weak
195int uart_post_test(int flags)
196{
197 unsigned char c;
198 int ret, saved_baud, b;
199 struct serial_device *saved_dev, *s;
200 bd_t *bd = gd->bd;
201
202 /* Save current serial state */
203 ret = 0;
204 saved_dev = serial_current;
205 saved_baud = bd->bi_baudrate;
206
207 for (s = serial_devices; s; s = s->next) {
208 /* If this driver doesn't support loop back, skip it */
209 if (!s->loop)
210 continue;
211
212 /* Test the next device */
213 serial_current = s;
214
215 ret = serial_init();
216 if (ret)
217 goto done;
218
219 /* Consume anything that happens to be queued */
220 while (serial_tstc())
221 serial_getc();
222
223 /* Enable loop back */
224 s->loop(1);
225
226 /* Test every available baud rate */
227 for (b = 0; b < ARRAY_SIZE(bauds); ++b) {
228 bd->bi_baudrate = bauds[b];
229 serial_setbrg();
230
231 /*
232 * Stick to printable chars to avoid issues:
233 * - terminal corruption
234 * - serial program reacting to sequences and sending
235 * back random extra data
236 * - most serial drivers add in extra chars (like \r\n)
237 */
238 for (c = 0x20; c < 0x7f; ++c) {
239 /* Send it out */
240 serial_putc(c);
241
242 /* Make sure it's the same one */
243 ret = (c != serial_getc());
244 if (ret) {
245 s->loop(0);
246 goto done;
247 }
248
249 /* Clean up the output in case it was sent */
250 serial_putc('\b');
251 ret = ('\b' != serial_getc());
252 if (ret) {
253 s->loop(0);
254 goto done;
255 }
256 }
257 }
258
259 /* Disable loop back */
260 s->loop(0);
261
Marek Vasutb46931d2012-09-07 14:35:31 +0200262 /* XXX: There is no serial_stop() !? */
263 if (s->stop)
264 s->stop();
Mike Frysinger078f2f12011-05-14 06:56:15 +0000265 }
266
267 done:
268 /* Restore previous serial state */
269 serial_current = saved_dev;
270 bd->bi_baudrate = saved_baud;
271 serial_reinit_all();
272 serial_setbrg();
273
274 return ret;
275}
276#endif