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);
46 serial_initfunc(s5p_serial_initialize);
47 serial_initfunc(zynq_serial_initalize);
49 void serial_register(struct serial_device *dev)
51 #ifdef CONFIG_NEEDS_MANUAL_RELOC
52 dev->start += gd->reloc_off;
53 dev->setbrg += gd->reloc_off;
54 dev->getc += gd->reloc_off;
55 dev->tstc += gd->reloc_off;
56 dev->putc += gd->reloc_off;
57 dev->puts += gd->reloc_off;
60 dev->next = serial_devices;
64 void serial_initialize(void)
66 mpc8xx_serial_initialize();
67 #if defined(CONFIG_SYS_NS16550_SERIAL)
68 #if defined(CONFIG_SYS_NS16550_COM1)
69 serial_register(&eserial1_device);
71 #if defined(CONFIG_SYS_NS16550_COM2)
72 serial_register(&eserial2_device);
74 #if defined(CONFIG_SYS_NS16550_COM3)
75 serial_register(&eserial3_device);
77 #if defined(CONFIG_SYS_NS16550_COM4)
78 serial_register(&eserial4_device);
80 #endif /* CONFIG_SYS_NS16550_SERIAL */
81 pxa_serial_initialize();
82 s3c24xx_serial_initialize();
83 s5p_serial_initialize();
84 #if defined(CONFIG_MPC512X)
85 #if defined(CONFIG_SYS_PSC1)
86 serial_register(&serial1_device);
88 #if defined(CONFIG_SYS_PSC3)
89 serial_register(&serial3_device);
91 #if defined(CONFIG_SYS_PSC4)
92 serial_register(&serial4_device);
94 #if defined(CONFIG_SYS_PSC6)
95 serial_register(&serial6_device);
98 #if defined(CONFIG_SYS_BFIN_UART)
99 serial_register_bfin_uart();
101 #if defined(CONFIG_XILINX_UARTLITE)
102 # ifdef XILINX_UARTLITE_BASEADDR
103 serial_register(&uartlite_serial0_device);
104 # endif /* XILINX_UARTLITE_BASEADDR */
105 # ifdef XILINX_UARTLITE_BASEADDR1
106 serial_register(&uartlite_serial1_device);
107 # endif /* XILINX_UARTLITE_BASEADDR1 */
108 # ifdef XILINX_UARTLITE_BASEADDR2
109 serial_register(&uartlite_serial2_device);
110 # endif /* XILINX_UARTLITE_BASEADDR2 */
111 # ifdef XILINX_UARTLITE_BASEADDR3
112 serial_register(&uartlite_serial3_device);
113 # endif /* XILINX_UARTLITE_BASEADDR3 */
114 #endif /* CONFIG_XILINX_UARTLITE */
115 zynq_serial_initalize();
116 serial_assign(default_serial_console()->name);
119 void serial_stdio_init(void)
121 struct stdio_dev dev;
122 struct serial_device *s = serial_devices;
125 memset(&dev, 0, sizeof(dev));
127 strcpy(dev.name, s->name);
128 dev.flags = DEV_FLAGS_OUTPUT | DEV_FLAGS_INPUT;
130 dev.start = s->start;
137 stdio_register(&dev);
143 int serial_assign(const char *name)
145 struct serial_device *s;
147 for (s = serial_devices; s; s = s->next) {
148 if (strcmp(s->name, name) == 0) {
157 void serial_reinit_all(void)
159 struct serial_device *s;
161 for (s = serial_devices; s; s = s->next)
165 static struct serial_device *get_current(void)
167 struct serial_device *dev;
169 if (!(gd->flags & GD_FLG_RELOC) || !serial_current) {
170 dev = default_serial_console();
172 /* We must have a console device */
174 panic("Cannot find console");
176 dev = serial_current;
180 int serial_init(void)
182 return get_current()->start();
185 void serial_setbrg(void)
187 get_current()->setbrg();
190 int serial_getc(void)
192 return get_current()->getc();
195 int serial_tstc(void)
197 return get_current()->tstc();
200 void serial_putc(const char c)
202 get_current()->putc(c);
205 void serial_puts(const char *s)
207 get_current()->puts(s);
210 #if CONFIG_POST & CONFIG_SYS_POST_UART
211 static const int bauds[] = CONFIG_SYS_BAUDRATE_TABLE;
213 /* Mark weak until post/cpu/.../uart.c migrate over */
215 int uart_post_test(int flags)
218 int ret, saved_baud, b;
219 struct serial_device *saved_dev, *s;
222 /* Save current serial state */
224 saved_dev = serial_current;
225 saved_baud = bd->bi_baudrate;
227 for (s = serial_devices; s; s = s->next) {
228 /* If this driver doesn't support loop back, skip it */
232 /* Test the next device */
239 /* Consume anything that happens to be queued */
240 while (serial_tstc())
243 /* Enable loop back */
246 /* Test every available baud rate */
247 for (b = 0; b < ARRAY_SIZE(bauds); ++b) {
248 bd->bi_baudrate = bauds[b];
252 * Stick to printable chars to avoid issues:
253 * - terminal corruption
254 * - serial program reacting to sequences and sending
255 * back random extra data
256 * - most serial drivers add in extra chars (like \r\n)
258 for (c = 0x20; c < 0x7f; ++c) {
262 /* Make sure it's the same one */
263 ret = (c != serial_getc());
269 /* Clean up the output in case it was sent */
271 ret = ('\b' != serial_getc());
279 /* Disable loop back */
282 /* XXX: There is no serial_stop() !? */
288 /* Restore previous serial state */
289 serial_current = saved_dev;
290 bd->bi_baudrate = saved_baud;