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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); |
b4980515 | 46 | serial_initfunc(s5p_serial_initialize); |
51d8102f | 47 | serial_initfunc(zynq_serial_initalize); |
87d69229 | 48 | serial_initfunc(uartlite_serial_initialize); |
f0eb1f61 | 49 | |
c52b4f79 | 50 | void serial_register(struct serial_device *dev) |
281e00a3 | 51 | { |
2e5167cc | 52 | #ifdef CONFIG_NEEDS_MANUAL_RELOC |
89143fb3 | 53 | dev->start += gd->reloc_off; |
281e00a3 WD |
54 | dev->setbrg += gd->reloc_off; |
55 | dev->getc += gd->reloc_off; | |
56 | dev->tstc += gd->reloc_off; | |
57 | dev->putc += gd->reloc_off; | |
58 | dev->puts += gd->reloc_off; | |
521af04d | 59 | #endif |
281e00a3 WD |
60 | |
61 | dev->next = serial_devices; | |
62 | serial_devices = dev; | |
281e00a3 WD |
63 | } |
64 | ||
a6e6f7f4 | 65 | void serial_initialize(void) |
281e00a3 | 66 | { |
f0eb1f61 | 67 | mpc8xx_serial_initialize(); |
6d0f6bcf JCPV |
68 | #if defined(CONFIG_SYS_NS16550_SERIAL) |
69 | #if defined(CONFIG_SYS_NS16550_COM1) | |
0fd30252 WD |
70 | serial_register(&eserial1_device); |
71 | #endif | |
6d0f6bcf | 72 | #if defined(CONFIG_SYS_NS16550_COM2) |
0fd30252 WD |
73 | serial_register(&eserial2_device); |
74 | #endif | |
6d0f6bcf | 75 | #if defined(CONFIG_SYS_NS16550_COM3) |
0fd30252 WD |
76 | serial_register(&eserial3_device); |
77 | #endif | |
6d0f6bcf | 78 | #if defined(CONFIG_SYS_NS16550_COM4) |
0fd30252 WD |
79 | serial_register(&eserial4_device); |
80 | #endif | |
6d0f6bcf | 81 | #endif /* CONFIG_SYS_NS16550_SERIAL */ |
1fe5c110 | 82 | pxa_serial_initialize(); |
28af6385 | 83 | s3c24xx_serial_initialize(); |
b4980515 | 84 | s5p_serial_initialize(); |
e3b28e67 AG |
85 | #if defined(CONFIG_MPC512X) |
86 | #if defined(CONFIG_SYS_PSC1) | |
87 | serial_register(&serial1_device); | |
88 | #endif | |
89 | #if defined(CONFIG_SYS_PSC3) | |
90 | serial_register(&serial3_device); | |
91 | #endif | |
92 | #if defined(CONFIG_SYS_PSC4) | |
93 | serial_register(&serial4_device); | |
94 | #endif | |
95 | #if defined(CONFIG_SYS_PSC6) | |
96 | serial_register(&serial6_device); | |
97 | #endif | |
635f330f MF |
98 | #endif |
99 | #if defined(CONFIG_SYS_BFIN_UART) | |
100 | serial_register_bfin_uart(); | |
80172c61 | 101 | #endif |
87d69229 | 102 | uartlite_serial_initialize(); |
51d8102f | 103 | zynq_serial_initalize(); |
a6e6f7f4 | 104 | serial_assign(default_serial_console()->name); |
281e00a3 WD |
105 | } |
106 | ||
a6e6f7f4 | 107 | void serial_stdio_init(void) |
281e00a3 | 108 | { |
52cb4d4f | 109 | struct stdio_dev dev; |
281e00a3 WD |
110 | struct serial_device *s = serial_devices; |
111 | ||
2ee66533 | 112 | while (s) { |
a6e6f7f4 | 113 | memset(&dev, 0, sizeof(dev)); |
281e00a3 | 114 | |
a6e6f7f4 | 115 | strcpy(dev.name, s->name); |
281e00a3 WD |
116 | dev.flags = DEV_FLAGS_OUTPUT | DEV_FLAGS_INPUT; |
117 | ||
89143fb3 MV |
118 | dev.start = s->start; |
119 | dev.stop = s->stop; | |
281e00a3 WD |
120 | dev.putc = s->putc; |
121 | dev.puts = s->puts; | |
122 | dev.getc = s->getc; | |
123 | dev.tstc = s->tstc; | |
124 | ||
a6e6f7f4 | 125 | stdio_register(&dev); |
281e00a3 WD |
126 | |
127 | s = s->next; | |
128 | } | |
129 | } | |
130 | ||
7813ca9b | 131 | int serial_assign(const char *name) |
281e00a3 WD |
132 | { |
133 | struct serial_device *s; | |
134 | ||
2ee66533 | 135 | for (s = serial_devices; s; s = s->next) { |
a6e6f7f4 | 136 | if (strcmp(s->name, name) == 0) { |
281e00a3 WD |
137 | serial_current = s; |
138 | return 0; | |
139 | } | |
140 | } | |
141 | ||
142 | return 1; | |
143 | } | |
144 | ||
a6e6f7f4 | 145 | void serial_reinit_all(void) |
281e00a3 WD |
146 | { |
147 | struct serial_device *s; | |
148 | ||
a6e6f7f4 | 149 | for (s = serial_devices; s; s = s->next) |
89143fb3 | 150 | s->start(); |
281e00a3 WD |
151 | } |
152 | ||
857c283e | 153 | static struct serial_device *get_current(void) |
281e00a3 | 154 | { |
857c283e | 155 | struct serial_device *dev; |
2ee66533 | 156 | |
857c283e SG |
157 | if (!(gd->flags & GD_FLG_RELOC) || !serial_current) { |
158 | dev = default_serial_console(); | |
159 | ||
160 | /* We must have a console device */ | |
161 | if (!dev) | |
162 | panic("Cannot find console"); | |
163 | } else | |
164 | dev = serial_current; | |
165 | return dev; | |
166 | } | |
281e00a3 | 167 | |
857c283e SG |
168 | int serial_init(void) |
169 | { | |
89143fb3 | 170 | return get_current()->start(); |
281e00a3 WD |
171 | } |
172 | ||
a6e6f7f4 | 173 | void serial_setbrg(void) |
281e00a3 | 174 | { |
857c283e | 175 | get_current()->setbrg(); |
281e00a3 WD |
176 | } |
177 | ||
a6e6f7f4 | 178 | int serial_getc(void) |
281e00a3 | 179 | { |
857c283e | 180 | return get_current()->getc(); |
281e00a3 WD |
181 | } |
182 | ||
a6e6f7f4 | 183 | int serial_tstc(void) |
281e00a3 | 184 | { |
857c283e | 185 | return get_current()->tstc(); |
281e00a3 WD |
186 | } |
187 | ||
a6e6f7f4 | 188 | void serial_putc(const char c) |
281e00a3 | 189 | { |
857c283e | 190 | get_current()->putc(c); |
281e00a3 WD |
191 | } |
192 | ||
a6e6f7f4 | 193 | void serial_puts(const char *s) |
281e00a3 | 194 | { |
857c283e | 195 | get_current()->puts(s); |
281e00a3 | 196 | } |
7b826c2f MF |
197 | |
198 | #if CONFIG_POST & CONFIG_SYS_POST_UART | |
199 | static const int bauds[] = CONFIG_SYS_BAUDRATE_TABLE; | |
200 | ||
201 | /* Mark weak until post/cpu/.../uart.c migrate over */ | |
202 | __weak | |
203 | int uart_post_test(int flags) | |
204 | { | |
205 | unsigned char c; | |
206 | int ret, saved_baud, b; | |
207 | struct serial_device *saved_dev, *s; | |
208 | bd_t *bd = gd->bd; | |
209 | ||
210 | /* Save current serial state */ | |
211 | ret = 0; | |
212 | saved_dev = serial_current; | |
213 | saved_baud = bd->bi_baudrate; | |
214 | ||
215 | for (s = serial_devices; s; s = s->next) { | |
216 | /* If this driver doesn't support loop back, skip it */ | |
217 | if (!s->loop) | |
218 | continue; | |
219 | ||
220 | /* Test the next device */ | |
221 | serial_current = s; | |
222 | ||
223 | ret = serial_init(); | |
224 | if (ret) | |
225 | goto done; | |
226 | ||
227 | /* Consume anything that happens to be queued */ | |
228 | while (serial_tstc()) | |
229 | serial_getc(); | |
230 | ||
231 | /* Enable loop back */ | |
232 | s->loop(1); | |
233 | ||
234 | /* Test every available baud rate */ | |
235 | for (b = 0; b < ARRAY_SIZE(bauds); ++b) { | |
236 | bd->bi_baudrate = bauds[b]; | |
237 | serial_setbrg(); | |
238 | ||
239 | /* | |
240 | * Stick to printable chars to avoid issues: | |
241 | * - terminal corruption | |
242 | * - serial program reacting to sequences and sending | |
243 | * back random extra data | |
244 | * - most serial drivers add in extra chars (like \r\n) | |
245 | */ | |
246 | for (c = 0x20; c < 0x7f; ++c) { | |
247 | /* Send it out */ | |
248 | serial_putc(c); | |
249 | ||
250 | /* Make sure it's the same one */ | |
251 | ret = (c != serial_getc()); | |
252 | if (ret) { | |
253 | s->loop(0); | |
254 | goto done; | |
255 | } | |
256 | ||
257 | /* Clean up the output in case it was sent */ | |
258 | serial_putc('\b'); | |
259 | ret = ('\b' != serial_getc()); | |
260 | if (ret) { | |
261 | s->loop(0); | |
262 | goto done; | |
263 | } | |
264 | } | |
265 | } | |
266 | ||
267 | /* Disable loop back */ | |
268 | s->loop(0); | |
269 | ||
89143fb3 MV |
270 | /* XXX: There is no serial_stop() !? */ |
271 | if (s->stop) | |
272 | s->stop(); | |
7b826c2f MF |
273 | } |
274 | ||
275 | done: | |
276 | /* Restore previous serial state */ | |
277 | serial_current = saved_dev; | |
278 | bd->bi_baudrate = saved_baud; | |
279 | serial_reinit_all(); | |
280 | serial_setbrg(); | |
281 | ||
282 | return ret; | |
283 | } | |
284 | #endif |