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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); |
abc0ed8d | 44 | serial_initfunc(ns16550_serial_initialize); |
1fe5c110 | 45 | serial_initfunc(pxa_serial_initialize); |
28af6385 | 46 | serial_initfunc(s3c24xx_serial_initialize); |
b4980515 | 47 | serial_initfunc(s5p_serial_initialize); |
51d8102f | 48 | serial_initfunc(zynq_serial_initalize); |
5ae1de0d | 49 | serial_initfunc(bfin_serial_initialize); |
41651cab | 50 | serial_initfunc(bfin_jtag_initialize); |
918327c8 | 51 | serial_initfunc(mpc512x_serial_initialize); |
87d69229 | 52 | serial_initfunc(uartlite_serial_initialize); |
7b953c51 | 53 | serial_initfunc(au1x00_serial_initialize); |
f0eb1f61 | 54 | |
c52b4f79 | 55 | void serial_register(struct serial_device *dev) |
281e00a3 | 56 | { |
2e5167cc | 57 | #ifdef CONFIG_NEEDS_MANUAL_RELOC |
89143fb3 | 58 | dev->start += gd->reloc_off; |
281e00a3 WD |
59 | dev->setbrg += gd->reloc_off; |
60 | dev->getc += gd->reloc_off; | |
61 | dev->tstc += gd->reloc_off; | |
62 | dev->putc += gd->reloc_off; | |
63 | dev->puts += gd->reloc_off; | |
521af04d | 64 | #endif |
281e00a3 WD |
65 | |
66 | dev->next = serial_devices; | |
67 | serial_devices = dev; | |
281e00a3 WD |
68 | } |
69 | ||
a6e6f7f4 | 70 | void serial_initialize(void) |
281e00a3 | 71 | { |
f0eb1f61 | 72 | mpc8xx_serial_initialize(); |
abc0ed8d | 73 | ns16550_serial_initialize(); |
1fe5c110 | 74 | pxa_serial_initialize(); |
28af6385 | 75 | s3c24xx_serial_initialize(); |
b4980515 | 76 | s5p_serial_initialize(); |
918327c8 | 77 | mpc512x_serial_initialize(); |
5ae1de0d | 78 | bfin_serial_initialize(); |
41651cab | 79 | bfin_jtag_initialize(); |
87d69229 | 80 | uartlite_serial_initialize(); |
51d8102f | 81 | zynq_serial_initalize(); |
7b953c51 MV |
82 | au1x00_serial_initialize(); |
83 | ||
a6e6f7f4 | 84 | serial_assign(default_serial_console()->name); |
281e00a3 WD |
85 | } |
86 | ||
a6e6f7f4 | 87 | void serial_stdio_init(void) |
281e00a3 | 88 | { |
52cb4d4f | 89 | struct stdio_dev dev; |
281e00a3 WD |
90 | struct serial_device *s = serial_devices; |
91 | ||
2ee66533 | 92 | while (s) { |
a6e6f7f4 | 93 | memset(&dev, 0, sizeof(dev)); |
281e00a3 | 94 | |
a6e6f7f4 | 95 | strcpy(dev.name, s->name); |
281e00a3 WD |
96 | dev.flags = DEV_FLAGS_OUTPUT | DEV_FLAGS_INPUT; |
97 | ||
89143fb3 MV |
98 | dev.start = s->start; |
99 | dev.stop = s->stop; | |
281e00a3 WD |
100 | dev.putc = s->putc; |
101 | dev.puts = s->puts; | |
102 | dev.getc = s->getc; | |
103 | dev.tstc = s->tstc; | |
104 | ||
a6e6f7f4 | 105 | stdio_register(&dev); |
281e00a3 WD |
106 | |
107 | s = s->next; | |
108 | } | |
109 | } | |
110 | ||
7813ca9b | 111 | int serial_assign(const char *name) |
281e00a3 WD |
112 | { |
113 | struct serial_device *s; | |
114 | ||
2ee66533 | 115 | for (s = serial_devices; s; s = s->next) { |
a6e6f7f4 | 116 | if (strcmp(s->name, name) == 0) { |
281e00a3 WD |
117 | serial_current = s; |
118 | return 0; | |
119 | } | |
120 | } | |
121 | ||
122 | return 1; | |
123 | } | |
124 | ||
a6e6f7f4 | 125 | void serial_reinit_all(void) |
281e00a3 WD |
126 | { |
127 | struct serial_device *s; | |
128 | ||
a6e6f7f4 | 129 | for (s = serial_devices; s; s = s->next) |
89143fb3 | 130 | s->start(); |
281e00a3 WD |
131 | } |
132 | ||
857c283e | 133 | static struct serial_device *get_current(void) |
281e00a3 | 134 | { |
857c283e | 135 | struct serial_device *dev; |
2ee66533 | 136 | |
857c283e SG |
137 | if (!(gd->flags & GD_FLG_RELOC) || !serial_current) { |
138 | dev = default_serial_console(); | |
139 | ||
140 | /* We must have a console device */ | |
141 | if (!dev) | |
142 | panic("Cannot find console"); | |
143 | } else | |
144 | dev = serial_current; | |
145 | return dev; | |
146 | } | |
281e00a3 | 147 | |
857c283e SG |
148 | int serial_init(void) |
149 | { | |
89143fb3 | 150 | return get_current()->start(); |
281e00a3 WD |
151 | } |
152 | ||
a6e6f7f4 | 153 | void serial_setbrg(void) |
281e00a3 | 154 | { |
857c283e | 155 | get_current()->setbrg(); |
281e00a3 WD |
156 | } |
157 | ||
a6e6f7f4 | 158 | int serial_getc(void) |
281e00a3 | 159 | { |
857c283e | 160 | return get_current()->getc(); |
281e00a3 WD |
161 | } |
162 | ||
a6e6f7f4 | 163 | int serial_tstc(void) |
281e00a3 | 164 | { |
857c283e | 165 | return get_current()->tstc(); |
281e00a3 WD |
166 | } |
167 | ||
a6e6f7f4 | 168 | void serial_putc(const char c) |
281e00a3 | 169 | { |
857c283e | 170 | get_current()->putc(c); |
281e00a3 WD |
171 | } |
172 | ||
a6e6f7f4 | 173 | void serial_puts(const char *s) |
281e00a3 | 174 | { |
857c283e | 175 | get_current()->puts(s); |
281e00a3 | 176 | } |
7b826c2f MF |
177 | |
178 | #if CONFIG_POST & CONFIG_SYS_POST_UART | |
179 | static const int bauds[] = CONFIG_SYS_BAUDRATE_TABLE; | |
180 | ||
181 | /* Mark weak until post/cpu/.../uart.c migrate over */ | |
182 | __weak | |
183 | int uart_post_test(int flags) | |
184 | { | |
185 | unsigned char c; | |
186 | int ret, saved_baud, b; | |
187 | struct serial_device *saved_dev, *s; | |
188 | bd_t *bd = gd->bd; | |
189 | ||
190 | /* Save current serial state */ | |
191 | ret = 0; | |
192 | saved_dev = serial_current; | |
193 | saved_baud = bd->bi_baudrate; | |
194 | ||
195 | for (s = serial_devices; s; s = s->next) { | |
196 | /* If this driver doesn't support loop back, skip it */ | |
197 | if (!s->loop) | |
198 | continue; | |
199 | ||
200 | /* Test the next device */ | |
201 | serial_current = s; | |
202 | ||
203 | ret = serial_init(); | |
204 | if (ret) | |
205 | goto done; | |
206 | ||
207 | /* Consume anything that happens to be queued */ | |
208 | while (serial_tstc()) | |
209 | serial_getc(); | |
210 | ||
211 | /* Enable loop back */ | |
212 | s->loop(1); | |
213 | ||
214 | /* Test every available baud rate */ | |
215 | for (b = 0; b < ARRAY_SIZE(bauds); ++b) { | |
216 | bd->bi_baudrate = bauds[b]; | |
217 | serial_setbrg(); | |
218 | ||
219 | /* | |
220 | * Stick to printable chars to avoid issues: | |
221 | * - terminal corruption | |
222 | * - serial program reacting to sequences and sending | |
223 | * back random extra data | |
224 | * - most serial drivers add in extra chars (like \r\n) | |
225 | */ | |
226 | for (c = 0x20; c < 0x7f; ++c) { | |
227 | /* Send it out */ | |
228 | serial_putc(c); | |
229 | ||
230 | /* Make sure it's the same one */ | |
231 | ret = (c != serial_getc()); | |
232 | if (ret) { | |
233 | s->loop(0); | |
234 | goto done; | |
235 | } | |
236 | ||
237 | /* Clean up the output in case it was sent */ | |
238 | serial_putc('\b'); | |
239 | ret = ('\b' != serial_getc()); | |
240 | if (ret) { | |
241 | s->loop(0); | |
242 | goto done; | |
243 | } | |
244 | } | |
245 | } | |
246 | ||
247 | /* Disable loop back */ | |
248 | s->loop(0); | |
249 | ||
89143fb3 MV |
250 | /* XXX: There is no serial_stop() !? */ |
251 | if (s->stop) | |
252 | s->stop(); | |
7b826c2f MF |
253 | } |
254 | ||
255 | done: | |
256 | /* Restore previous serial state */ | |
257 | serial_current = saved_dev; | |
258 | bd->bi_baudrate = saved_baud; | |
259 | serial_reinit_all(); | |
260 | serial_setbrg(); | |
261 | ||
262 | return ret; | |
263 | } | |
264 | #endif |