3 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
5 * See file CREDITS for list of people who contributed to this
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.
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.
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,
26 #include <stdio_dev.h>
28 #include <linux/compiler.h>
30 DECLARE_GLOBAL_DATA_PTR;
32 static struct serial_device *serial_devices;
33 static struct serial_device *serial_current;
35 static void serial_null(void)
39 #define serial_initfunc(name) \
41 __attribute__((weak, alias("serial_null")));
43 serial_initfunc(mpc8xx_serial_initialize);
44 serial_initfunc(ns16550_serial_initialize);
45 serial_initfunc(pxa_serial_initialize);
46 serial_initfunc(s3c24xx_serial_initialize);
47 serial_initfunc(s5p_serial_initialize);
48 serial_initfunc(zynq_serial_initalize);
49 serial_initfunc(mpc512x_serial_initialize);
50 serial_initfunc(uartlite_serial_initialize);
52 void serial_register(struct serial_device *dev)
54 #ifdef CONFIG_NEEDS_MANUAL_RELOC
55 dev->start += gd->reloc_off;
56 dev->setbrg += gd->reloc_off;
57 dev->getc += gd->reloc_off;
58 dev->tstc += gd->reloc_off;
59 dev->putc += gd->reloc_off;
60 dev->puts += gd->reloc_off;
63 dev->next = serial_devices;
67 void serial_initialize(void)
69 mpc8xx_serial_initialize();
70 ns16550_serial_initialize();
71 pxa_serial_initialize();
72 s3c24xx_serial_initialize();
73 s5p_serial_initialize();
74 mpc512x_serial_initialize();
75 #if defined(CONFIG_SYS_BFIN_UART)
76 serial_register_bfin_uart();
78 uartlite_serial_initialize();
79 zynq_serial_initalize();
80 serial_assign(default_serial_console()->name);
83 void serial_stdio_init(void)
86 struct serial_device *s = serial_devices;
89 memset(&dev, 0, sizeof(dev));
91 strcpy(dev.name, s->name);
92 dev.flags = DEV_FLAGS_OUTPUT | DEV_FLAGS_INPUT;
101 stdio_register(&dev);
107 int serial_assign(const char *name)
109 struct serial_device *s;
111 for (s = serial_devices; s; s = s->next) {
112 if (strcmp(s->name, name) == 0) {
121 void serial_reinit_all(void)
123 struct serial_device *s;
125 for (s = serial_devices; s; s = s->next)
129 static struct serial_device *get_current(void)
131 struct serial_device *dev;
133 if (!(gd->flags & GD_FLG_RELOC) || !serial_current) {
134 dev = default_serial_console();
136 /* We must have a console device */
138 panic("Cannot find console");
140 dev = serial_current;
144 int serial_init(void)
146 return get_current()->start();
149 void serial_setbrg(void)
151 get_current()->setbrg();
154 int serial_getc(void)
156 return get_current()->getc();
159 int serial_tstc(void)
161 return get_current()->tstc();
164 void serial_putc(const char c)
166 get_current()->putc(c);
169 void serial_puts(const char *s)
171 get_current()->puts(s);
174 #if CONFIG_POST & CONFIG_SYS_POST_UART
175 static const int bauds[] = CONFIG_SYS_BAUDRATE_TABLE;
177 /* Mark weak until post/cpu/.../uart.c migrate over */
179 int uart_post_test(int flags)
182 int ret, saved_baud, b;
183 struct serial_device *saved_dev, *s;
186 /* Save current serial state */
188 saved_dev = serial_current;
189 saved_baud = bd->bi_baudrate;
191 for (s = serial_devices; s; s = s->next) {
192 /* If this driver doesn't support loop back, skip it */
196 /* Test the next device */
203 /* Consume anything that happens to be queued */
204 while (serial_tstc())
207 /* Enable loop back */
210 /* Test every available baud rate */
211 for (b = 0; b < ARRAY_SIZE(bauds); ++b) {
212 bd->bi_baudrate = bauds[b];
216 * Stick to printable chars to avoid issues:
217 * - terminal corruption
218 * - serial program reacting to sequences and sending
219 * back random extra data
220 * - most serial drivers add in extra chars (like \r\n)
222 for (c = 0x20; c < 0x7f; ++c) {
226 /* Make sure it's the same one */
227 ret = (c != serial_getc());
233 /* Clean up the output in case it was sent */
235 ret = ('\b' != serial_getc());
243 /* Disable loop back */
246 /* XXX: There is no serial_stop() !? */
252 /* Restore previous serial state */
253 serial_current = saved_dev;
254 bd->bi_baudrate = saved_baud;