3 * Rob Taylor, Flying Pig Systems. robt@flyingpig.com.
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,
25 #include <linux/compiler.h>
32 #if defined (CONFIG_SERIAL_MULTI)
36 DECLARE_GLOBAL_DATA_PTR;
38 #if !defined(CONFIG_CONS_INDEX)
39 #if defined (CONFIG_SERIAL_MULTI)
40 /* with CONFIG_SERIAL_MULTI we might have no console
44 #error "No console index specified."
45 #endif /* CONFIG_SERIAL_MULTI */
46 #elif (CONFIG_CONS_INDEX < 1) || (CONFIG_CONS_INDEX > 4)
47 #error "Invalid console index value."
50 #if CONFIG_CONS_INDEX == 1 && !defined(CONFIG_SYS_NS16550_COM1)
51 #error "Console port 1 defined but not configured."
52 #elif CONFIG_CONS_INDEX == 2 && !defined(CONFIG_SYS_NS16550_COM2)
53 #error "Console port 2 defined but not configured."
54 #elif CONFIG_CONS_INDEX == 3 && !defined(CONFIG_SYS_NS16550_COM3)
55 #error "Console port 3 defined but not configured."
56 #elif CONFIG_CONS_INDEX == 4 && !defined(CONFIG_SYS_NS16550_COM4)
57 #error "Console port 4 defined but not configured."
58 #elif CONFIG_CONS_INDEX == 5 && !defined(CONFIG_SYS_NS16550_COM5)
59 #error "Console port 5 defined but not configured."
60 #elif CONFIG_CONS_INDEX == 6 && !defined(CONFIG_SYS_NS16550_COM6)
61 #error "Console port 6 defined but not configured."
64 /* Note: The port number specified in the functions is 1 based.
65 * the array is 0 based.
67 static NS16550_t serial_ports[] = {
68 #ifdef CONFIG_SYS_NS16550_COM1
69 (NS16550_t)CONFIG_SYS_NS16550_COM1,
73 #ifdef CONFIG_SYS_NS16550_COM2
74 (NS16550_t)CONFIG_SYS_NS16550_COM2,
78 #ifdef CONFIG_SYS_NS16550_COM3
79 (NS16550_t)CONFIG_SYS_NS16550_COM3,
83 #ifdef CONFIG_SYS_NS16550_COM4
84 (NS16550_t)CONFIG_SYS_NS16550_COM4,
88 #ifdef CONFIG_SYS_NS16550_COM5
89 (NS16550_t)CONFIG_SYS_NS16550_COM5,
93 #ifdef CONFIG_SYS_NS16550_COM6
94 (NS16550_t)CONFIG_SYS_NS16550_COM6,
100 #define PORT serial_ports[port-1]
101 #if defined(CONFIG_CONS_INDEX)
102 #define CONSOLE (serial_ports[CONFIG_CONS_INDEX-1])
105 #if defined(CONFIG_SERIAL_MULTI)
107 /* Multi serial device functions */
108 #define DECLARE_ESERIAL_FUNCTIONS(port) \
109 int eserial##port##_init (void) {\
111 clock_divisor = calc_divisor(serial_ports[port-1]); \
112 NS16550_init(serial_ports[port-1], clock_divisor); \
114 void eserial##port##_setbrg (void) {\
115 serial_setbrg_dev(port);}\
116 int eserial##port##_getc (void) {\
117 return serial_getc_dev(port);}\
118 int eserial##port##_tstc (void) {\
119 return serial_tstc_dev(port);}\
120 void eserial##port##_putc (const char c) {\
121 serial_putc_dev(port, c);}\
122 void eserial##port##_puts (const char *s) {\
123 serial_puts_dev(port, s);}
125 /* Serial device descriptor */
126 #define INIT_ESERIAL_STRUCTURE(port, name) {\
128 eserial##port##_init,\
130 eserial##port##_setbrg,\
131 eserial##port##_getc,\
132 eserial##port##_tstc,\
133 eserial##port##_putc,\
134 eserial##port##_puts, }
136 #endif /* CONFIG_SERIAL_MULTI */
138 static int calc_divisor (NS16550_t port)
140 #ifdef CONFIG_OMAP1510
141 /* If can't cleanly clock 115200 set div to 1 */
142 if ((CONFIG_SYS_NS16550_CLK == 12000000) && (gd->baudrate == 115200)) {
143 port->osc_12m_sel = OSC_12M_SEL; /* enable 6.5 * divisor */
144 return (1); /* return 1 for base divisor */
146 port->osc_12m_sel = 0; /* clear if previsouly set */
148 #ifdef CONFIG_OMAP1610
149 /* If can't cleanly clock 115200 set div to 1 */
150 if ((CONFIG_SYS_NS16550_CLK == 48000000) && (gd->baudrate == 115200)) {
151 return (26); /* return 26 for base divisor */
156 #define MODE_X_DIV 13
158 #define MODE_X_DIV 16
161 /* Compute divisor value. Normally, we should simply return:
162 * CONFIG_SYS_NS16550_CLK) / MODE_X_DIV / gd->baudrate
163 * but we need to round that value by adding 0.5.
164 * Rounding is especially important at high baud rates.
166 return (CONFIG_SYS_NS16550_CLK + (gd->baudrate * (MODE_X_DIV / 2))) /
167 (MODE_X_DIV * gd->baudrate);
170 #if !defined(CONFIG_SERIAL_MULTI)
171 int serial_init (void)
175 #ifdef CONFIG_NS87308
176 initialise_ns87308();
179 #ifdef CONFIG_SYS_NS16550_COM1
180 clock_divisor = calc_divisor(serial_ports[0]);
181 NS16550_init(serial_ports[0], clock_divisor);
183 #ifdef CONFIG_SYS_NS16550_COM2
184 clock_divisor = calc_divisor(serial_ports[1]);
185 NS16550_init(serial_ports[1], clock_divisor);
187 #ifdef CONFIG_SYS_NS16550_COM3
188 clock_divisor = calc_divisor(serial_ports[2]);
189 NS16550_init(serial_ports[2], clock_divisor);
191 #ifdef CONFIG_SYS_NS16550_COM4
192 clock_divisor = calc_divisor(serial_ports[3]);
193 NS16550_init(serial_ports[3], clock_divisor);
195 #ifdef CONFIG_SYS_NS16550_COM5
196 clock_divisor = calc_divisor(serial_ports[4]);
197 NS16550_init(serial_ports[4], clock_divisor);
199 #ifdef CONFIG_SYS_NS16550_COM6
200 clock_divisor = calc_divisor(serial_ports[5]);
201 NS16550_init(serial_ports[5], clock_divisor);
209 _serial_putc(const char c,const int port)
212 NS16550_putc(PORT, '\r');
214 NS16550_putc(PORT, c);
218 _serial_putc_raw(const char c,const int port)
220 NS16550_putc(PORT, c);
224 _serial_puts (const char *s,const int port)
227 _serial_putc (*s++,port);
233 _serial_getc(const int port)
235 return NS16550_getc(PORT);
239 _serial_tstc(const int port)
241 return NS16550_tstc(PORT);
245 _serial_setbrg (const int port)
249 clock_divisor = calc_divisor(PORT);
250 NS16550_reinit(PORT, clock_divisor);
253 #if defined(CONFIG_SERIAL_MULTI)
255 serial_putc_dev(unsigned int dev_index,const char c)
257 _serial_putc(c,dev_index);
261 serial_putc(const char c)
263 _serial_putc(c,CONFIG_CONS_INDEX);
267 #if defined(CONFIG_SERIAL_MULTI)
269 serial_putc_raw_dev(unsigned int dev_index,const char c)
271 _serial_putc_raw(c,dev_index);
275 serial_putc_raw(const char c)
277 _serial_putc_raw(c,CONFIG_CONS_INDEX);
281 #if defined(CONFIG_SERIAL_MULTI)
283 serial_puts_dev(unsigned int dev_index,const char *s)
285 _serial_puts(s,dev_index);
289 serial_puts(const char *s)
291 _serial_puts(s,CONFIG_CONS_INDEX);
295 #if defined(CONFIG_SERIAL_MULTI)
297 serial_getc_dev(unsigned int dev_index)
299 return _serial_getc(dev_index);
305 return _serial_getc(CONFIG_CONS_INDEX);
309 #if defined(CONFIG_SERIAL_MULTI)
311 serial_tstc_dev(unsigned int dev_index)
313 return _serial_tstc(dev_index);
319 return _serial_tstc(CONFIG_CONS_INDEX);
323 #if defined(CONFIG_SERIAL_MULTI)
325 serial_setbrg_dev(unsigned int dev_index)
327 _serial_setbrg(dev_index);
333 _serial_setbrg(CONFIG_CONS_INDEX);
337 #if defined(CONFIG_SERIAL_MULTI)
339 DECLARE_ESERIAL_FUNCTIONS(1);
340 struct serial_device eserial1_device =
341 INIT_ESERIAL_STRUCTURE(1, "eserial0");
342 DECLARE_ESERIAL_FUNCTIONS(2);
343 struct serial_device eserial2_device =
344 INIT_ESERIAL_STRUCTURE(2, "eserial1");
345 DECLARE_ESERIAL_FUNCTIONS(3);
346 struct serial_device eserial3_device =
347 INIT_ESERIAL_STRUCTURE(3, "eserial2");
348 DECLARE_ESERIAL_FUNCTIONS(4);
349 struct serial_device eserial4_device =
350 INIT_ESERIAL_STRUCTURE(4, "eserial3");
352 __weak struct serial_device *default_serial_console(void)
354 #if CONFIG_CONS_INDEX == 1
355 return &eserial1_device;
356 #elif CONFIG_CONS_INDEX == 2
357 return &eserial2_device;
358 #elif CONFIG_CONS_INDEX == 3
359 return &eserial3_device;
360 #elif CONFIG_CONS_INDEX == 4
361 return &eserial4_device;
363 #error "Bad CONFIG_CONS_INDEX."
367 #endif /* CONFIG_SERIAL_MULTI */