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(pxa_serial_initialize);
45 serial_initfunc(s3c24xx_serial_initialize);
47 void serial_register(struct serial_device *dev)
49 #ifdef CONFIG_NEEDS_MANUAL_RELOC
50 dev->start += gd->reloc_off;
51 dev->setbrg += gd->reloc_off;
52 dev->getc += gd->reloc_off;
53 dev->tstc += gd->reloc_off;
54 dev->putc += gd->reloc_off;
55 dev->puts += gd->reloc_off;
58 dev->next = serial_devices;
62 void serial_initialize(void)
64 mpc8xx_serial_initialize();
65 #if defined(CONFIG_SYS_NS16550_SERIAL)
66 #if defined(CONFIG_SYS_NS16550_COM1)
67 serial_register(&eserial1_device);
69 #if defined(CONFIG_SYS_NS16550_COM2)
70 serial_register(&eserial2_device);
72 #if defined(CONFIG_SYS_NS16550_COM3)
73 serial_register(&eserial3_device);
75 #if defined(CONFIG_SYS_NS16550_COM4)
76 serial_register(&eserial4_device);
78 #endif /* CONFIG_SYS_NS16550_SERIAL */
79 pxa_serial_initialize();
80 s3c24xx_serial_initialize();
81 #if defined(CONFIG_S5P)
82 serial_register(&s5p_serial0_device);
83 serial_register(&s5p_serial1_device);
84 serial_register(&s5p_serial2_device);
85 serial_register(&s5p_serial3_device);
87 #if defined(CONFIG_MPC512X)
88 #if defined(CONFIG_SYS_PSC1)
89 serial_register(&serial1_device);
91 #if defined(CONFIG_SYS_PSC3)
92 serial_register(&serial3_device);
94 #if defined(CONFIG_SYS_PSC4)
95 serial_register(&serial4_device);
97 #if defined(CONFIG_SYS_PSC6)
98 serial_register(&serial6_device);
101 #if defined(CONFIG_SYS_BFIN_UART)
102 serial_register_bfin_uart();
104 #if defined(CONFIG_XILINX_UARTLITE)
105 # ifdef XILINX_UARTLITE_BASEADDR
106 serial_register(&uartlite_serial0_device);
107 # endif /* XILINX_UARTLITE_BASEADDR */
108 # ifdef XILINX_UARTLITE_BASEADDR1
109 serial_register(&uartlite_serial1_device);
110 # endif /* XILINX_UARTLITE_BASEADDR1 */
111 # ifdef XILINX_UARTLITE_BASEADDR2
112 serial_register(&uartlite_serial2_device);
113 # endif /* XILINX_UARTLITE_BASEADDR2 */
114 # ifdef XILINX_UARTLITE_BASEADDR3
115 serial_register(&uartlite_serial3_device);
116 # endif /* XILINX_UARTLITE_BASEADDR3 */
117 #endif /* CONFIG_XILINX_UARTLITE */
118 #if defined(CONFIG_ZYNQ_SERIAL)
119 # ifdef CONFIG_ZYNQ_SERIAL_BASEADDR0
120 serial_register(&uart_zynq_serial0_device);
122 # ifdef CONFIG_ZYNQ_SERIAL_BASEADDR1
123 serial_register(&uart_zynq_serial1_device);
126 serial_assign(default_serial_console()->name);
129 void serial_stdio_init(void)
131 struct stdio_dev dev;
132 struct serial_device *s = serial_devices;
135 memset(&dev, 0, sizeof(dev));
137 strcpy(dev.name, s->name);
138 dev.flags = DEV_FLAGS_OUTPUT | DEV_FLAGS_INPUT;
140 dev.start = s->start;
147 stdio_register(&dev);
153 int serial_assign(const char *name)
155 struct serial_device *s;
157 for (s = serial_devices; s; s = s->next) {
158 if (strcmp(s->name, name) == 0) {
167 void serial_reinit_all(void)
169 struct serial_device *s;
171 for (s = serial_devices; s; s = s->next)
175 static struct serial_device *get_current(void)
177 struct serial_device *dev;
179 if (!(gd->flags & GD_FLG_RELOC) || !serial_current) {
180 dev = default_serial_console();
182 /* We must have a console device */
184 panic("Cannot find console");
186 dev = serial_current;
190 int serial_init(void)
192 return get_current()->start();
195 void serial_setbrg(void)
197 get_current()->setbrg();
200 int serial_getc(void)
202 return get_current()->getc();
205 int serial_tstc(void)
207 return get_current()->tstc();
210 void serial_putc(const char c)
212 get_current()->putc(c);
215 void serial_puts(const char *s)
217 get_current()->puts(s);
220 #if CONFIG_POST & CONFIG_SYS_POST_UART
221 static const int bauds[] = CONFIG_SYS_BAUDRATE_TABLE;
223 /* Mark weak until post/cpu/.../uart.c migrate over */
225 int uart_post_test(int flags)
228 int ret, saved_baud, b;
229 struct serial_device *saved_dev, *s;
232 /* Save current serial state */
234 saved_dev = serial_current;
235 saved_baud = bd->bi_baudrate;
237 for (s = serial_devices; s; s = s->next) {
238 /* If this driver doesn't support loop back, skip it */
242 /* Test the next device */
249 /* Consume anything that happens to be queued */
250 while (serial_tstc())
253 /* Enable loop back */
256 /* Test every available baud rate */
257 for (b = 0; b < ARRAY_SIZE(bauds); ++b) {
258 bd->bi_baudrate = bauds[b];
262 * Stick to printable chars to avoid issues:
263 * - terminal corruption
264 * - serial program reacting to sequences and sending
265 * back random extra data
266 * - most serial drivers add in extra chars (like \r\n)
268 for (c = 0x20; c < 0x7f; ++c) {
272 /* Make sure it's the same one */
273 ret = (c != serial_getc());
279 /* Clean up the output in case it was sent */
281 ret = ('\b' != serial_getc());
289 /* Disable loop back */
292 /* XXX: There is no serial_stop() !? */
298 /* Restore previous serial state */
299 serial_current = saved_dev;
300 bd->bi_baudrate = saved_baud;