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
);
48 void serial_register(struct serial_device
*dev
)
50 #ifdef CONFIG_NEEDS_MANUAL_RELOC
51 dev
->start
+= gd
->reloc_off
;
52 dev
->setbrg
+= gd
->reloc_off
;
53 dev
->getc
+= gd
->reloc_off
;
54 dev
->tstc
+= gd
->reloc_off
;
55 dev
->putc
+= gd
->reloc_off
;
56 dev
->puts
+= gd
->reloc_off
;
59 dev
->next
= serial_devices
;
63 void serial_initialize(void)
65 mpc8xx_serial_initialize();
66 #if defined(CONFIG_SYS_NS16550_SERIAL)
67 #if defined(CONFIG_SYS_NS16550_COM1)
68 serial_register(&eserial1_device
);
70 #if defined(CONFIG_SYS_NS16550_COM2)
71 serial_register(&eserial2_device
);
73 #if defined(CONFIG_SYS_NS16550_COM3)
74 serial_register(&eserial3_device
);
76 #if defined(CONFIG_SYS_NS16550_COM4)
77 serial_register(&eserial4_device
);
79 #endif /* CONFIG_SYS_NS16550_SERIAL */
80 pxa_serial_initialize();
81 s3c24xx_serial_initialize();
82 s5p_serial_initialize();
83 #if defined(CONFIG_MPC512X)
84 #if defined(CONFIG_SYS_PSC1)
85 serial_register(&serial1_device
);
87 #if defined(CONFIG_SYS_PSC3)
88 serial_register(&serial3_device
);
90 #if defined(CONFIG_SYS_PSC4)
91 serial_register(&serial4_device
);
93 #if defined(CONFIG_SYS_PSC6)
94 serial_register(&serial6_device
);
97 #if defined(CONFIG_SYS_BFIN_UART)
98 serial_register_bfin_uart();
100 #if defined(CONFIG_XILINX_UARTLITE)
101 # ifdef XILINX_UARTLITE_BASEADDR
102 serial_register(&uartlite_serial0_device
);
103 # endif /* XILINX_UARTLITE_BASEADDR */
104 # ifdef XILINX_UARTLITE_BASEADDR1
105 serial_register(&uartlite_serial1_device
);
106 # endif /* XILINX_UARTLITE_BASEADDR1 */
107 # ifdef XILINX_UARTLITE_BASEADDR2
108 serial_register(&uartlite_serial2_device
);
109 # endif /* XILINX_UARTLITE_BASEADDR2 */
110 # ifdef XILINX_UARTLITE_BASEADDR3
111 serial_register(&uartlite_serial3_device
);
112 # endif /* XILINX_UARTLITE_BASEADDR3 */
113 #endif /* CONFIG_XILINX_UARTLITE */
114 #if defined(CONFIG_ZYNQ_SERIAL)
115 # ifdef CONFIG_ZYNQ_SERIAL_BASEADDR0
116 serial_register(&uart_zynq_serial0_device
);
118 # ifdef CONFIG_ZYNQ_SERIAL_BASEADDR1
119 serial_register(&uart_zynq_serial1_device
);
122 serial_assign(default_serial_console()->name
);
125 void serial_stdio_init(void)
127 struct stdio_dev dev
;
128 struct serial_device
*s
= serial_devices
;
131 memset(&dev
, 0, sizeof(dev
));
133 strcpy(dev
.name
, s
->name
);
134 dev
.flags
= DEV_FLAGS_OUTPUT
| DEV_FLAGS_INPUT
;
136 dev
.start
= s
->start
;
143 stdio_register(&dev
);
149 int serial_assign(const char *name
)
151 struct serial_device
*s
;
153 for (s
= serial_devices
; s
; s
= s
->next
) {
154 if (strcmp(s
->name
, name
) == 0) {
163 void serial_reinit_all(void)
165 struct serial_device
*s
;
167 for (s
= serial_devices
; s
; s
= s
->next
)
171 static struct serial_device
*get_current(void)
173 struct serial_device
*dev
;
175 if (!(gd
->flags
& GD_FLG_RELOC
) || !serial_current
) {
176 dev
= default_serial_console();
178 /* We must have a console device */
180 panic("Cannot find console");
182 dev
= serial_current
;
186 int serial_init(void)
188 return get_current()->start();
191 void serial_setbrg(void)
193 get_current()->setbrg();
196 int serial_getc(void)
198 return get_current()->getc();
201 int serial_tstc(void)
203 return get_current()->tstc();
206 void serial_putc(const char c
)
208 get_current()->putc(c
);
211 void serial_puts(const char *s
)
213 get_current()->puts(s
);
216 #if CONFIG_POST & CONFIG_SYS_POST_UART
217 static const int bauds
[] = CONFIG_SYS_BAUDRATE_TABLE
;
219 /* Mark weak until post/cpu/.../uart.c migrate over */
221 int uart_post_test(int flags
)
224 int ret
, saved_baud
, b
;
225 struct serial_device
*saved_dev
, *s
;
228 /* Save current serial state */
230 saved_dev
= serial_current
;
231 saved_baud
= bd
->bi_baudrate
;
233 for (s
= serial_devices
; s
; s
= s
->next
) {
234 /* If this driver doesn't support loop back, skip it */
238 /* Test the next device */
245 /* Consume anything that happens to be queued */
246 while (serial_tstc())
249 /* Enable loop back */
252 /* Test every available baud rate */
253 for (b
= 0; b
< ARRAY_SIZE(bauds
); ++b
) {
254 bd
->bi_baudrate
= bauds
[b
];
258 * Stick to printable chars to avoid issues:
259 * - terminal corruption
260 * - serial program reacting to sequences and sending
261 * back random extra data
262 * - most serial drivers add in extra chars (like \r\n)
264 for (c
= 0x20; c
< 0x7f; ++c
) {
268 /* Make sure it's the same one */
269 ret
= (c
!= serial_getc());
275 /* Clean up the output in case it was sent */
277 ret
= ('\b' != serial_getc());
285 /* Disable loop back */
288 /* XXX: There is no serial_stop() !? */
294 /* Restore previous serial state */
295 serial_current
= saved_dev
;
296 bd
->bi_baudrate
= saved_baud
;