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wdenk281e00a2004-08-01 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-VILLARD52cb4d42009-05-16 12:14:54 +020026#include <stdio_dev.h>
Mike Frysinger7b826c22011-05-14 06:56:15 +000027#include <post.h>
28#include <linux/compiler.h>
wdenk281e00a2004-08-01 22:48:16 +000029
Wolfgang Denkd87080b2006-03-31 18:32:53 +020030DECLARE_GLOBAL_DATA_PTR;
31
Gerlando Falautoa6e6f7f2011-11-18 06:49:11 +000032static struct serial_device *serial_devices;
33static struct serial_device *serial_current;
wdenk281e00a2004-08-01 22:48:16 +000034
Marek Vasut2a333ae2012-09-12 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 Vasutf0eb1f62012-09-12 13:50:56 +020043serial_initfunc(mpc8xx_serial_initialize);
Marek Vasutabc0ed82012-09-12 20:02:05 +020044serial_initfunc(ns16550_serial_initialize);
Marek Vasut1fe5c112012-09-12 13:57:58 +020045serial_initfunc(pxa_serial_initialize);
Marek Vasut28af6382012-09-12 16:01:16 +020046serial_initfunc(s3c24xx_serial_initialize);
Marek Vasutb4980512012-09-12 19:39:57 +020047serial_initfunc(s5p_serial_initialize);
Tom Rini51d81022012-10-08 14:46:23 -070048serial_initfunc(zynq_serial_initalize);
Marek Vasut5ae1de02012-09-12 20:07:54 +020049serial_initfunc(bfin_serial_initialize);
Marek Vasut41651ca2012-09-13 00:02:54 +020050serial_initfunc(bfin_jtag_initialize);
Marek Vasut918327c2012-09-12 19:50:18 +020051serial_initfunc(mpc512x_serial_initialize);
Marek Vasut87d69222012-09-12 19:45:58 +020052serial_initfunc(uartlite_serial_initialize);
Marek Vasut7b953c52012-09-13 01:16:50 +020053serial_initfunc(au1x00_serial_initialize);
Marek Vasut01911422012-09-13 01:20:07 +020054serial_initfunc(asc_serial_initialize);
Marek Vasut6cb32732012-09-13 01:20:59 +020055serial_initfunc(jz_serial_initialize);
Marek Vasutb57c6522012-09-13 01:26:42 +020056serial_initfunc(mpc5xx_serial_initialize);
Marek Vasut2063a542012-09-13 01:29:31 +020057serial_initfunc(mpc8220_serial_initialize);
Marek Vasutd68f4da2012-09-13 01:34:16 +020058serial_initfunc(mpc8260_scc_serial_initialize);
59serial_initfunc(mpc8260_smc_serial_initialize);
Marek Vasut7a311542012-09-13 01:38:52 +020060serial_initfunc(mpc85xx_serial_initialize);
Marek Vasutfcc20742012-09-13 01:40:33 +020061serial_initfunc(iop480_serial_initialize);
Marek Vasutaf7be3b2012-09-13 12:25:07 +020062serial_initfunc(leon2_serial_initialize);
Marek Vasut29b5ff72012-09-13 12:25:48 +020063serial_initfunc(leon3_serial_initialize);
Marek Vasutafe4c382012-09-13 12:26:39 +020064serial_initfunc(marvell_serial_initialize);
Marek Vasut5dee6f52012-09-13 12:27:37 +020065serial_initfunc(amirix_serial_initialize);
Marek Vasutc45a14a2012-09-13 12:28:07 +020066serial_initfunc(bmw_serial_initialize);
Marek Vasutd25c39d2012-09-13 12:29:31 +020067serial_initfunc(cogent_serial_initialize);
Marek Vasut619c90b2012-09-13 12:32:56 +020068serial_initfunc(cpci750_serial_initialize);
Marek Vasutf0eb1f62012-09-12 13:50:56 +020069
Mike Frysingerc52b4f72011-04-29 18:03:30 +000070void serial_register(struct serial_device *dev)
wdenk281e00a2004-08-01 22:48:16 +000071{
Wolfgang Denk2e5167c2010-10-28 20:00:11 +020072#ifdef CONFIG_NEEDS_MANUAL_RELOC
Marek Vasut89143fb2012-09-07 14:35:31 +020073 dev->start += gd->reloc_off;
wdenk281e00a2004-08-01 22:48:16 +000074 dev->setbrg += gd->reloc_off;
75 dev->getc += gd->reloc_off;
76 dev->tstc += gd->reloc_off;
77 dev->putc += gd->reloc_off;
78 dev->puts += gd->reloc_off;
Peter Tyser521af042009-09-21 11:20:36 -050079#endif
wdenk281e00a2004-08-01 22:48:16 +000080
81 dev->next = serial_devices;
82 serial_devices = dev;
wdenk281e00a2004-08-01 22:48:16 +000083}
84
Gerlando Falautoa6e6f7f2011-11-18 06:49:11 +000085void serial_initialize(void)
wdenk281e00a2004-08-01 22:48:16 +000086{
Marek Vasutf0eb1f62012-09-12 13:50:56 +020087 mpc8xx_serial_initialize();
Marek Vasutabc0ed82012-09-12 20:02:05 +020088 ns16550_serial_initialize();
Marek Vasut1fe5c112012-09-12 13:57:58 +020089 pxa_serial_initialize();
Marek Vasut28af6382012-09-12 16:01:16 +020090 s3c24xx_serial_initialize();
Marek Vasutb4980512012-09-12 19:39:57 +020091 s5p_serial_initialize();
Marek Vasut918327c2012-09-12 19:50:18 +020092 mpc512x_serial_initialize();
Marek Vasut5ae1de02012-09-12 20:07:54 +020093 bfin_serial_initialize();
Marek Vasut41651ca2012-09-13 00:02:54 +020094 bfin_jtag_initialize();
Marek Vasut87d69222012-09-12 19:45:58 +020095 uartlite_serial_initialize();
Tom Rini51d81022012-10-08 14:46:23 -070096 zynq_serial_initalize();
Marek Vasut7b953c52012-09-13 01:16:50 +020097 au1x00_serial_initialize();
Marek Vasut01911422012-09-13 01:20:07 +020098 asc_serial_initialize();
Marek Vasut6cb32732012-09-13 01:20:59 +020099 jz_serial_initialize();
Marek Vasutb57c6522012-09-13 01:26:42 +0200100 mpc5xx_serial_initialize();
Marek Vasut2063a542012-09-13 01:29:31 +0200101 mpc8220_serial_initialize();
Marek Vasutd68f4da2012-09-13 01:34:16 +0200102 mpc8260_scc_serial_initialize();
103 mpc8260_smc_serial_initialize();
Marek Vasut7a311542012-09-13 01:38:52 +0200104 mpc85xx_serial_initialize();
Marek Vasutfcc20742012-09-13 01:40:33 +0200105 iop480_serial_initialize();
Marek Vasutaf7be3b2012-09-13 12:25:07 +0200106 leon2_serial_initialize();
Marek Vasut29b5ff72012-09-13 12:25:48 +0200107 leon3_serial_initialize();
Marek Vasutafe4c382012-09-13 12:26:39 +0200108 marvell_serial_initialize();
Marek Vasut5dee6f52012-09-13 12:27:37 +0200109 amirix_serial_initialize();
Marek Vasutc45a14a2012-09-13 12:28:07 +0200110 bmw_serial_initialize();
Marek Vasutd25c39d2012-09-13 12:29:31 +0200111 cogent_serial_initialize();
Marek Vasut619c90b2012-09-13 12:32:56 +0200112 cpci750_serial_initialize();
Marek Vasut7b953c52012-09-13 01:16:50 +0200113
Gerlando Falautoa6e6f7f2011-11-18 06:49:11 +0000114 serial_assign(default_serial_console()->name);
wdenk281e00a2004-08-01 22:48:16 +0000115}
116
Gerlando Falautoa6e6f7f2011-11-18 06:49:11 +0000117void serial_stdio_init(void)
wdenk281e00a2004-08-01 22:48:16 +0000118{
Jean-Christophe PLAGNIOL-VILLARD52cb4d42009-05-16 12:14:54 +0200119 struct stdio_dev dev;
wdenk281e00a2004-08-01 22:48:16 +0000120 struct serial_device *s = serial_devices;
121
wdenk2ee66532004-10-11 22:43:02 +0000122 while (s) {
Gerlando Falautoa6e6f7f2011-11-18 06:49:11 +0000123 memset(&dev, 0, sizeof(dev));
wdenk281e00a2004-08-01 22:48:16 +0000124
Gerlando Falautoa6e6f7f2011-11-18 06:49:11 +0000125 strcpy(dev.name, s->name);
wdenk281e00a2004-08-01 22:48:16 +0000126 dev.flags = DEV_FLAGS_OUTPUT | DEV_FLAGS_INPUT;
127
Marek Vasut89143fb2012-09-07 14:35:31 +0200128 dev.start = s->start;
129 dev.stop = s->stop;
wdenk281e00a2004-08-01 22:48:16 +0000130 dev.putc = s->putc;
131 dev.puts = s->puts;
132 dev.getc = s->getc;
133 dev.tstc = s->tstc;
134
Gerlando Falautoa6e6f7f2011-11-18 06:49:11 +0000135 stdio_register(&dev);
wdenk281e00a2004-08-01 22:48:16 +0000136
137 s = s->next;
138 }
139}
140
Gerlando Falauto7813ca92011-11-18 06:49:12 +0000141int serial_assign(const char *name)
wdenk281e00a2004-08-01 22:48:16 +0000142{
143 struct serial_device *s;
144
wdenk2ee66532004-10-11 22:43:02 +0000145 for (s = serial_devices; s; s = s->next) {
Gerlando Falautoa6e6f7f2011-11-18 06:49:11 +0000146 if (strcmp(s->name, name) == 0) {
wdenk281e00a2004-08-01 22:48:16 +0000147 serial_current = s;
148 return 0;
149 }
150 }
151
152 return 1;
153}
154
Gerlando Falautoa6e6f7f2011-11-18 06:49:11 +0000155void serial_reinit_all(void)
wdenk281e00a2004-08-01 22:48:16 +0000156{
157 struct serial_device *s;
158
Gerlando Falautoa6e6f7f2011-11-18 06:49:11 +0000159 for (s = serial_devices; s; s = s->next)
Marek Vasut89143fb2012-09-07 14:35:31 +0200160 s->start();
wdenk281e00a2004-08-01 22:48:16 +0000161}
162
Simon Glass857c2832011-08-19 11:09:43 +0000163static struct serial_device *get_current(void)
wdenk281e00a2004-08-01 22:48:16 +0000164{
Simon Glass857c2832011-08-19 11:09:43 +0000165 struct serial_device *dev;
166
wdenk2ee66532004-10-11 22:43:02 +0000167 if (!(gd->flags & GD_FLG_RELOC) || !serial_current) {
Simon Glass857c2832011-08-19 11:09:43 +0000168 dev = default_serial_console();
wdenk2ee66532004-10-11 22:43:02 +0000169
Simon Glass857c2832011-08-19 11:09:43 +0000170 /* We must have a console device */
171 if (!dev)
172 panic("Cannot find console");
173 } else
174 dev = serial_current;
175 return dev;
176}
wdenk281e00a2004-08-01 22:48:16 +0000177
Simon Glass857c2832011-08-19 11:09:43 +0000178int serial_init(void)
179{
Marek Vasut89143fb2012-09-07 14:35:31 +0200180 return get_current()->start();
wdenk281e00a2004-08-01 22:48:16 +0000181}
182
Gerlando Falautoa6e6f7f2011-11-18 06:49:11 +0000183void serial_setbrg(void)
wdenk281e00a2004-08-01 22:48:16 +0000184{
Simon Glass857c2832011-08-19 11:09:43 +0000185 get_current()->setbrg();
wdenk281e00a2004-08-01 22:48:16 +0000186}
187
Gerlando Falautoa6e6f7f2011-11-18 06:49:11 +0000188int serial_getc(void)
wdenk281e00a2004-08-01 22:48:16 +0000189{
Simon Glass857c2832011-08-19 11:09:43 +0000190 return get_current()->getc();
wdenk281e00a2004-08-01 22:48:16 +0000191}
192
Gerlando Falautoa6e6f7f2011-11-18 06:49:11 +0000193int serial_tstc(void)
wdenk281e00a2004-08-01 22:48:16 +0000194{
Simon Glass857c2832011-08-19 11:09:43 +0000195 return get_current()->tstc();
wdenk281e00a2004-08-01 22:48:16 +0000196}
197
Gerlando Falautoa6e6f7f2011-11-18 06:49:11 +0000198void serial_putc(const char c)
wdenk281e00a2004-08-01 22:48:16 +0000199{
Simon Glass857c2832011-08-19 11:09:43 +0000200 get_current()->putc(c);
wdenk281e00a2004-08-01 22:48:16 +0000201}
202
Gerlando Falautoa6e6f7f2011-11-18 06:49:11 +0000203void serial_puts(const char *s)
wdenk281e00a2004-08-01 22:48:16 +0000204{
Simon Glass857c2832011-08-19 11:09:43 +0000205 get_current()->puts(s);
wdenk281e00a2004-08-01 22:48:16 +0000206}
Mike Frysinger7b826c22011-05-14 06:56:15 +0000207
208#if CONFIG_POST & CONFIG_SYS_POST_UART
209static const int bauds[] = CONFIG_SYS_BAUDRATE_TABLE;
210
211/* Mark weak until post/cpu/.../uart.c migrate over */
212__weak
213int uart_post_test(int flags)
214{
215 unsigned char c;
216 int ret, saved_baud, b;
217 struct serial_device *saved_dev, *s;
218 bd_t *bd = gd->bd;
219
220 /* Save current serial state */
221 ret = 0;
222 saved_dev = serial_current;
223 saved_baud = bd->bi_baudrate;
224
225 for (s = serial_devices; s; s = s->next) {
226 /* If this driver doesn't support loop back, skip it */
227 if (!s->loop)
228 continue;
229
230 /* Test the next device */
231 serial_current = s;
232
233 ret = serial_init();
234 if (ret)
235 goto done;
236
237 /* Consume anything that happens to be queued */
238 while (serial_tstc())
239 serial_getc();
240
241 /* Enable loop back */
242 s->loop(1);
243
244 /* Test every available baud rate */
245 for (b = 0; b < ARRAY_SIZE(bauds); ++b) {
246 bd->bi_baudrate = bauds[b];
247 serial_setbrg();
248
249 /*
250 * Stick to printable chars to avoid issues:
251 * - terminal corruption
252 * - serial program reacting to sequences and sending
253 * back random extra data
254 * - most serial drivers add in extra chars (like \r\n)
255 */
256 for (c = 0x20; c < 0x7f; ++c) {
257 /* Send it out */
258 serial_putc(c);
259
260 /* Make sure it's the same one */
261 ret = (c != serial_getc());
262 if (ret) {
263 s->loop(0);
264 goto done;
265 }
266
267 /* Clean up the output in case it was sent */
268 serial_putc('\b');
269 ret = ('\b' != serial_getc());
270 if (ret) {
271 s->loop(0);
272 goto done;
273 }
274 }
275 }
276
277 /* Disable loop back */
278 s->loop(0);
279
Marek Vasut89143fb2012-09-07 14:35:31 +0200280 /* XXX: There is no serial_stop() !? */
281 if (s->stop)
282 s->stop();
Mike Frysinger7b826c22011-05-14 06:56:15 +0000283 }
284
285 done:
286 /* Restore previous serial state */
287 serial_current = saved_dev;
288 bd->bi_baudrate = saved_baud;
289 serial_reinit_all();
290 serial_setbrg();
291
292 return ret;
293}
294#endif