1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
|
/*
* (C) Copyright 2000
* Rob Taylor, Flying Pig Systems. robt@flyingpig.com.
*
* See file CREDITS for list of people who contributed to this
* project.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of
* the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
*/
#include <common.h>
#ifdef CONFIG_SYS_NS16550_SERIAL
#include <ns16550.h>
#ifdef CONFIG_NS87308
#include <ns87308.h>
#endif
#if defined (CONFIG_SERIAL_MULTI)
#include <serial.h>
#endif
DECLARE_GLOBAL_DATA_PTR;
#if !defined(CONFIG_CONS_INDEX)
#if defined (CONFIG_SERIAL_MULTI)
/* with CONFIG_SERIAL_MULTI we might have no console
* on these devices
*/
#else
#error "No console index specified."
#endif /* CONFIG_SERIAL_MULTI */
#elif (CONFIG_CONS_INDEX < 1) || (CONFIG_CONS_INDEX > 4)
#error "Invalid console index value."
#endif
#if CONFIG_CONS_INDEX == 1 && !defined(CONFIG_SYS_NS16550_COM1)
#error "Console port 1 defined but not configured."
#elif CONFIG_CONS_INDEX == 2 && !defined(CONFIG_SYS_NS16550_COM2)
#error "Console port 2 defined but not configured."
#elif CONFIG_CONS_INDEX == 3 && !defined(CONFIG_SYS_NS16550_COM3)
#error "Console port 3 defined but not configured."
#elif CONFIG_CONS_INDEX == 4 && !defined(CONFIG_SYS_NS16550_COM4)
#error "Console port 4 defined but not configured."
#endif
/* Note: The port number specified in the functions is 1 based.
* the array is 0 based.
*/
static NS16550_t serial_ports[4] = {
#ifdef CONFIG_SYS_NS16550_COM1
(NS16550_t)CONFIG_SYS_NS16550_COM1,
#else
NULL,
#endif
#ifdef CONFIG_SYS_NS16550_COM2
(NS16550_t)CONFIG_SYS_NS16550_COM2,
#else
NULL,
#endif
#ifdef CONFIG_SYS_NS16550_COM3
(NS16550_t)CONFIG_SYS_NS16550_COM3,
#else
NULL,
#endif
#ifdef CONFIG_SYS_NS16550_COM4
(NS16550_t)CONFIG_SYS_NS16550_COM4
#else
NULL
#endif
};
#define PORT serial_ports[port-1]
#if defined(CONFIG_CONS_INDEX)
#define CONSOLE (serial_ports[CONFIG_CONS_INDEX-1])
#endif
#if defined(CONFIG_SERIAL_MULTI)
/* Multi serial device functions */
#define DECLARE_ESERIAL_FUNCTIONS(port) \
int eserial##port##_init (void) {\
int clock_divisor; \
clock_divisor = calc_divisor(serial_ports[port-1]); \
NS16550_init(serial_ports[port-1], clock_divisor); \
return(0);}\
void eserial##port##_setbrg (void) {\
serial_setbrg_dev(port);}\
int eserial##port##_getc (void) {\
return serial_getc_dev(port);}\
int eserial##port##_tstc (void) {\
return serial_tstc_dev(port);}\
void eserial##port##_putc (const char c) {\
serial_putc_dev(port, c);}\
void eserial##port##_puts (const char *s) {\
serial_puts_dev(port, s);}
/* Serial device descriptor */
#define INIT_ESERIAL_STRUCTURE(port,name,bus) {\
name,\
bus,\
eserial##port##_init,\
eserial##port##_setbrg,\
eserial##port##_getc,\
eserial##port##_tstc,\
eserial##port##_putc,\
eserial##port##_puts, }
#endif /* CONFIG_SERIAL_MULTI */
static int calc_divisor (NS16550_t port)
{
#ifdef CONFIG_OMAP1510
/* If can't cleanly clock 115200 set div to 1 */
if ((CONFIG_SYS_NS16550_CLK == 12000000) && (gd->baudrate == 115200)) {
port->osc_12m_sel = OSC_12M_SEL; /* enable 6.5 * divisor */
return (1); /* return 1 for base divisor */
}
port->osc_12m_sel = 0; /* clear if previsouly set */
#endif
#ifdef CONFIG_OMAP1610
/* If can't cleanly clock 115200 set div to 1 */
if ((CONFIG_SYS_NS16550_CLK == 48000000) && (gd->baudrate == 115200)) {
return (26); /* return 26 for base divisor */
}
#endif
#ifdef CONFIG_APTIX
#define MODE_X_DIV 13
#else
#define MODE_X_DIV 16
#endif
/* Compute divisor value. Normally, we should simply return:
* CONFIG_SYS_NS16550_CLK) / MODE_X_DIV / gd->baudrate
* but we need to round that value by adding 0.5.
* Rounding is especially important at high baud rates.
*/
return (CONFIG_SYS_NS16550_CLK + (gd->baudrate * (MODE_X_DIV / 2))) /
(MODE_X_DIV * gd->baudrate);
}
#if !defined(CONFIG_SERIAL_MULTI)
int serial_init (void)
{
int clock_divisor;
#ifdef CONFIG_NS87308
initialise_ns87308();
#endif
#ifdef CONFIG_SYS_NS16550_COM1
clock_divisor = calc_divisor(serial_ports[0]);
NS16550_init(serial_ports[0], clock_divisor);
#endif
#ifdef CONFIG_SYS_NS16550_COM2
clock_divisor = calc_divisor(serial_ports[1]);
NS16550_init(serial_ports[1], clock_divisor);
#endif
#ifdef CONFIG_SYS_NS16550_COM3
clock_divisor = calc_divisor(serial_ports[2]);
NS16550_init(serial_ports[2], clock_divisor);
#endif
#ifdef CONFIG_SYS_NS16550_COM4
clock_divisor = calc_divisor(serial_ports[3]);
NS16550_init(serial_ports[3], clock_divisor);
#endif
return (0);
}
#endif
void
_serial_putc(const char c,const int port)
{
if (c == '\n')
NS16550_putc(PORT, '\r');
NS16550_putc(PORT, c);
}
void
_serial_putc_raw(const char c,const int port)
{
NS16550_putc(PORT, c);
}
void
_serial_puts (const char *s,const int port)
{
while (*s) {
_serial_putc (*s++,port);
}
}
int
_serial_getc(const int port)
{
return NS16550_getc(PORT);
}
int
_serial_tstc(const int port)
{
return NS16550_tstc(PORT);
}
void
_serial_setbrg (const int port)
{
int clock_divisor;
clock_divisor = calc_divisor(PORT);
NS16550_reinit(PORT, clock_divisor);
}
#if defined(CONFIG_SERIAL_MULTI)
static inline void
serial_putc_dev(unsigned int dev_index,const char c)
{
_serial_putc(c,dev_index);
}
#else
void
serial_putc(const char c)
{
_serial_putc(c,CONFIG_CONS_INDEX);
}
#endif
#if defined(CONFIG_SERIAL_MULTI)
static inline void
serial_putc_raw_dev(unsigned int dev_index,const char c)
{
_serial_putc_raw(c,dev_index);
}
#else
void
serial_putc_raw(const char c)
{
_serial_putc_raw(c,CONFIG_CONS_INDEX);
}
#endif
#if defined(CONFIG_SERIAL_MULTI)
static inline void
serial_puts_dev(unsigned int dev_index,const char *s)
{
_serial_puts(s,dev_index);
}
#else
void
serial_puts(const char *s)
{
_serial_puts(s,CONFIG_CONS_INDEX);
}
#endif
#if defined(CONFIG_SERIAL_MULTI)
static inline int
serial_getc_dev(unsigned int dev_index)
{
return _serial_getc(dev_index);
}
#else
int
serial_getc(void)
{
return _serial_getc(CONFIG_CONS_INDEX);
}
#endif
#if defined(CONFIG_SERIAL_MULTI)
static inline int
serial_tstc_dev(unsigned int dev_index)
{
return _serial_tstc(dev_index);
}
#else
int
serial_tstc(void)
{
return _serial_tstc(CONFIG_CONS_INDEX);
}
#endif
#if defined(CONFIG_SERIAL_MULTI)
static inline void
serial_setbrg_dev(unsigned int dev_index)
{
_serial_setbrg(dev_index);
}
#else
void
serial_setbrg(void)
{
_serial_setbrg(CONFIG_CONS_INDEX);
}
#endif
#if defined(CONFIG_SERIAL_MULTI)
DECLARE_ESERIAL_FUNCTIONS(1);
struct serial_device eserial1_device =
INIT_ESERIAL_STRUCTURE(1,"eserial0","EUART1");
DECLARE_ESERIAL_FUNCTIONS(2);
struct serial_device eserial2_device =
INIT_ESERIAL_STRUCTURE(2,"eserial1","EUART2");
DECLARE_ESERIAL_FUNCTIONS(3);
struct serial_device eserial3_device =
INIT_ESERIAL_STRUCTURE(3,"eserial2","EUART3");
DECLARE_ESERIAL_FUNCTIONS(4);
struct serial_device eserial4_device =
INIT_ESERIAL_STRUCTURE(4,"eserial3","EUART4");
#endif /* CONFIG_SERIAL_MULTI */
#endif
|
