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281e00a3 WD |
1 | /* |
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> | |
52cb4d4f | 26 | #include <stdio_dev.h> |
7b826c2f MF |
27 | #include <post.h> |
28 | #include <linux/compiler.h> | |
281e00a3 | 29 | |
d87080b7 WD |
30 | DECLARE_GLOBAL_DATA_PTR; |
31 | ||
a6e6f7f4 GF |
32 | static struct serial_device *serial_devices; |
33 | static struct serial_device *serial_current; | |
281e00a3 | 34 | |
2a333aeb MV |
35 | static void serial_null(void) |
36 | { | |
37 | } | |
38 | ||
39 | #define serial_initfunc(name) \ | |
40 | void name(void) \ | |
41 | __attribute__((weak, alias("serial_null"))); | |
42 | ||
f0eb1f61 | 43 | serial_initfunc(mpc8xx_serial_initialize); |
1fe5c110 | 44 | serial_initfunc(pxa_serial_initialize); |
28af6385 | 45 | serial_initfunc(s3c24xx_serial_initialize); |
f0eb1f61 | 46 | |
c52b4f79 | 47 | void serial_register(struct serial_device *dev) |
281e00a3 | 48 | { |
2e5167cc | 49 | #ifdef CONFIG_NEEDS_MANUAL_RELOC |
89143fb3 | 50 | dev->start += gd->reloc_off; |
281e00a3 WD |
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; | |
521af04d | 56 | #endif |
281e00a3 WD |
57 | |
58 | dev->next = serial_devices; | |
59 | serial_devices = dev; | |
281e00a3 WD |
60 | } |
61 | ||
a6e6f7f4 | 62 | void serial_initialize(void) |
281e00a3 | 63 | { |
f0eb1f61 | 64 | mpc8xx_serial_initialize(); |
6d0f6bcf JCPV |
65 | #if defined(CONFIG_SYS_NS16550_SERIAL) |
66 | #if defined(CONFIG_SYS_NS16550_COM1) | |
0fd30252 WD |
67 | serial_register(&eserial1_device); |
68 | #endif | |
6d0f6bcf | 69 | #if defined(CONFIG_SYS_NS16550_COM2) |
0fd30252 WD |
70 | serial_register(&eserial2_device); |
71 | #endif | |
6d0f6bcf | 72 | #if defined(CONFIG_SYS_NS16550_COM3) |
0fd30252 WD |
73 | serial_register(&eserial3_device); |
74 | #endif | |
6d0f6bcf | 75 | #if defined(CONFIG_SYS_NS16550_COM4) |
0fd30252 WD |
76 | serial_register(&eserial4_device); |
77 | #endif | |
6d0f6bcf | 78 | #endif /* CONFIG_SYS_NS16550_SERIAL */ |
1fe5c110 | 79 | pxa_serial_initialize(); |
28af6385 | 80 | s3c24xx_serial_initialize(); |
889a275d | 81 | #if defined(CONFIG_S5P) |
46a3b5c8 MK |
82 | serial_register(&s5p_serial0_device); |
83 | serial_register(&s5p_serial1_device); | |
84 | serial_register(&s5p_serial2_device); | |
85 | serial_register(&s5p_serial3_device); | |
e3b28e67 AG |
86 | #endif |
87 | #if defined(CONFIG_MPC512X) | |
88 | #if defined(CONFIG_SYS_PSC1) | |
89 | serial_register(&serial1_device); | |
90 | #endif | |
91 | #if defined(CONFIG_SYS_PSC3) | |
92 | serial_register(&serial3_device); | |
93 | #endif | |
94 | #if defined(CONFIG_SYS_PSC4) | |
95 | serial_register(&serial4_device); | |
96 | #endif | |
97 | #if defined(CONFIG_SYS_PSC6) | |
98 | serial_register(&serial6_device); | |
99 | #endif | |
635f330f MF |
100 | #endif |
101 | #if defined(CONFIG_SYS_BFIN_UART) | |
102 | serial_register_bfin_uart(); | |
80172c61 | 103 | #endif |
49a23e4a MS |
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 */ | |
194846f3 MS |
118 | #if defined(CONFIG_ZYNQ_SERIAL) |
119 | # ifdef CONFIG_ZYNQ_SERIAL_BASEADDR0 | |
120 | serial_register(&uart_zynq_serial0_device); | |
121 | # endif | |
122 | # ifdef CONFIG_ZYNQ_SERIAL_BASEADDR1 | |
123 | serial_register(&uart_zynq_serial1_device); | |
124 | # endif | |
125 | #endif | |
a6e6f7f4 | 126 | serial_assign(default_serial_console()->name); |
281e00a3 WD |
127 | } |
128 | ||
a6e6f7f4 | 129 | void serial_stdio_init(void) |
281e00a3 | 130 | { |
52cb4d4f | 131 | struct stdio_dev dev; |
281e00a3 WD |
132 | struct serial_device *s = serial_devices; |
133 | ||
2ee66533 | 134 | while (s) { |
a6e6f7f4 | 135 | memset(&dev, 0, sizeof(dev)); |
281e00a3 | 136 | |
a6e6f7f4 | 137 | strcpy(dev.name, s->name); |
281e00a3 WD |
138 | dev.flags = DEV_FLAGS_OUTPUT | DEV_FLAGS_INPUT; |
139 | ||
89143fb3 MV |
140 | dev.start = s->start; |
141 | dev.stop = s->stop; | |
281e00a3 WD |
142 | dev.putc = s->putc; |
143 | dev.puts = s->puts; | |
144 | dev.getc = s->getc; | |
145 | dev.tstc = s->tstc; | |
146 | ||
a6e6f7f4 | 147 | stdio_register(&dev); |
281e00a3 WD |
148 | |
149 | s = s->next; | |
150 | } | |
151 | } | |
152 | ||
7813ca9b | 153 | int serial_assign(const char *name) |
281e00a3 WD |
154 | { |
155 | struct serial_device *s; | |
156 | ||
2ee66533 | 157 | for (s = serial_devices; s; s = s->next) { |
a6e6f7f4 | 158 | if (strcmp(s->name, name) == 0) { |
281e00a3 WD |
159 | serial_current = s; |
160 | return 0; | |
161 | } | |
162 | } | |
163 | ||
164 | return 1; | |
165 | } | |
166 | ||
a6e6f7f4 | 167 | void serial_reinit_all(void) |
281e00a3 WD |
168 | { |
169 | struct serial_device *s; | |
170 | ||
a6e6f7f4 | 171 | for (s = serial_devices; s; s = s->next) |
89143fb3 | 172 | s->start(); |
281e00a3 WD |
173 | } |
174 | ||
857c283e | 175 | static struct serial_device *get_current(void) |
281e00a3 | 176 | { |
857c283e | 177 | struct serial_device *dev; |
2ee66533 | 178 | |
857c283e SG |
179 | if (!(gd->flags & GD_FLG_RELOC) || !serial_current) { |
180 | dev = default_serial_console(); | |
181 | ||
182 | /* We must have a console device */ | |
183 | if (!dev) | |
184 | panic("Cannot find console"); | |
185 | } else | |
186 | dev = serial_current; | |
187 | return dev; | |
188 | } | |
281e00a3 | 189 | |
857c283e SG |
190 | int serial_init(void) |
191 | { | |
89143fb3 | 192 | return get_current()->start(); |
281e00a3 WD |
193 | } |
194 | ||
a6e6f7f4 | 195 | void serial_setbrg(void) |
281e00a3 | 196 | { |
857c283e | 197 | get_current()->setbrg(); |
281e00a3 WD |
198 | } |
199 | ||
a6e6f7f4 | 200 | int serial_getc(void) |
281e00a3 | 201 | { |
857c283e | 202 | return get_current()->getc(); |
281e00a3 WD |
203 | } |
204 | ||
a6e6f7f4 | 205 | int serial_tstc(void) |
281e00a3 | 206 | { |
857c283e | 207 | return get_current()->tstc(); |
281e00a3 WD |
208 | } |
209 | ||
a6e6f7f4 | 210 | void serial_putc(const char c) |
281e00a3 | 211 | { |
857c283e | 212 | get_current()->putc(c); |
281e00a3 WD |
213 | } |
214 | ||
a6e6f7f4 | 215 | void serial_puts(const char *s) |
281e00a3 | 216 | { |
857c283e | 217 | get_current()->puts(s); |
281e00a3 | 218 | } |
7b826c2f MF |
219 | |
220 | #if CONFIG_POST & CONFIG_SYS_POST_UART | |
221 | static const int bauds[] = CONFIG_SYS_BAUDRATE_TABLE; | |
222 | ||
223 | /* Mark weak until post/cpu/.../uart.c migrate over */ | |
224 | __weak | |
225 | int uart_post_test(int flags) | |
226 | { | |
227 | unsigned char c; | |
228 | int ret, saved_baud, b; | |
229 | struct serial_device *saved_dev, *s; | |
230 | bd_t *bd = gd->bd; | |
231 | ||
232 | /* Save current serial state */ | |
233 | ret = 0; | |
234 | saved_dev = serial_current; | |
235 | saved_baud = bd->bi_baudrate; | |
236 | ||
237 | for (s = serial_devices; s; s = s->next) { | |
238 | /* If this driver doesn't support loop back, skip it */ | |
239 | if (!s->loop) | |
240 | continue; | |
241 | ||
242 | /* Test the next device */ | |
243 | serial_current = s; | |
244 | ||
245 | ret = serial_init(); | |
246 | if (ret) | |
247 | goto done; | |
248 | ||
249 | /* Consume anything that happens to be queued */ | |
250 | while (serial_tstc()) | |
251 | serial_getc(); | |
252 | ||
253 | /* Enable loop back */ | |
254 | s->loop(1); | |
255 | ||
256 | /* Test every available baud rate */ | |
257 | for (b = 0; b < ARRAY_SIZE(bauds); ++b) { | |
258 | bd->bi_baudrate = bauds[b]; | |
259 | serial_setbrg(); | |
260 | ||
261 | /* | |
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) | |
267 | */ | |
268 | for (c = 0x20; c < 0x7f; ++c) { | |
269 | /* Send it out */ | |
270 | serial_putc(c); | |
271 | ||
272 | /* Make sure it's the same one */ | |
273 | ret = (c != serial_getc()); | |
274 | if (ret) { | |
275 | s->loop(0); | |
276 | goto done; | |
277 | } | |
278 | ||
279 | /* Clean up the output in case it was sent */ | |
280 | serial_putc('\b'); | |
281 | ret = ('\b' != serial_getc()); | |
282 | if (ret) { | |
283 | s->loop(0); | |
284 | goto done; | |
285 | } | |
286 | } | |
287 | } | |
288 | ||
289 | /* Disable loop back */ | |
290 | s->loop(0); | |
291 | ||
89143fb3 MV |
292 | /* XXX: There is no serial_stop() !? */ |
293 | if (s->stop) | |
294 | s->stop(); | |
7b826c2f MF |
295 | } |
296 | ||
297 | done: | |
298 | /* Restore previous serial state */ | |
299 | serial_current = saved_dev; | |
300 | bd->bi_baudrate = saved_baud; | |
301 | serial_reinit_all(); | |
302 | serial_setbrg(); | |
303 | ||
304 | return ret; | |
305 | } | |
306 | #endif |