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."
60 /* Note: The port number specified in the functions is 1 based.
61 * the array is 0 based.
63 static NS16550_t serial_ports[4] = {
64 #ifdef CONFIG_SYS_NS16550_COM1
65 (NS16550_t)CONFIG_SYS_NS16550_COM1,
69 #ifdef CONFIG_SYS_NS16550_COM2
70 (NS16550_t)CONFIG_SYS_NS16550_COM2,
74 #ifdef CONFIG_SYS_NS16550_COM3
75 (NS16550_t)CONFIG_SYS_NS16550_COM3,
79 #ifdef CONFIG_SYS_NS16550_COM4
80 (NS16550_t)CONFIG_SYS_NS16550_COM4
86 #define PORT serial_ports[port-1]
87 #if defined(CONFIG_CONS_INDEX)
88 #define CONSOLE (serial_ports[CONFIG_CONS_INDEX-1])
91 #if defined(CONFIG_SERIAL_MULTI)
93 /* Multi serial device functions */
94 #define DECLARE_ESERIAL_FUNCTIONS(port) \
95 int eserial##port##_init (void) {\
97 clock_divisor = calc_divisor(serial_ports[port-1]); \
98 NS16550_init(serial_ports[port-1], clock_divisor); \
100 void eserial##port##_setbrg (void) {\
101 serial_setbrg_dev(port);}\
102 int eserial##port##_getc (void) {\
103 return serial_getc_dev(port);}\
104 int eserial##port##_tstc (void) {\
105 return serial_tstc_dev(port);}\
106 void eserial##port##_putc (const char c) {\
107 serial_putc_dev(port, c);}\
108 void eserial##port##_puts (const char *s) {\
109 serial_puts_dev(port, s);}
111 /* Serial device descriptor */
112 #define INIT_ESERIAL_STRUCTURE(port, name) {\
114 eserial##port##_init,\
116 eserial##port##_setbrg,\
117 eserial##port##_getc,\
118 eserial##port##_tstc,\
119 eserial##port##_putc,\
120 eserial##port##_puts, }
122 #endif /* CONFIG_SERIAL_MULTI */
124 static int calc_divisor (NS16550_t port)
126 #ifdef CONFIG_OMAP1510
127 /* If can't cleanly clock 115200 set div to 1 */
128 if ((CONFIG_SYS_NS16550_CLK == 12000000) && (gd->baudrate == 115200)) {
129 port->osc_12m_sel = OSC_12M_SEL; /* enable 6.5 * divisor */
130 return (1); /* return 1 for base divisor */
132 port->osc_12m_sel = 0; /* clear if previsouly set */
134 #ifdef CONFIG_OMAP1610
135 /* If can't cleanly clock 115200 set div to 1 */
136 if ((CONFIG_SYS_NS16550_CLK == 48000000) && (gd->baudrate == 115200)) {
137 return (26); /* return 26 for base divisor */
142 #define MODE_X_DIV 13
144 #define MODE_X_DIV 16
147 /* Compute divisor value. Normally, we should simply return:
148 * CONFIG_SYS_NS16550_CLK) / MODE_X_DIV / gd->baudrate
149 * but we need to round that value by adding 0.5.
150 * Rounding is especially important at high baud rates.
152 return (CONFIG_SYS_NS16550_CLK + (gd->baudrate * (MODE_X_DIV / 2))) /
153 (MODE_X_DIV * gd->baudrate);
156 #if !defined(CONFIG_SERIAL_MULTI)
157 int serial_init (void)
161 #ifdef CONFIG_NS87308
162 initialise_ns87308();
165 #ifdef CONFIG_SYS_NS16550_COM1
166 clock_divisor = calc_divisor(serial_ports[0]);
167 NS16550_init(serial_ports[0], clock_divisor);
169 #ifdef CONFIG_SYS_NS16550_COM2
170 clock_divisor = calc_divisor(serial_ports[1]);
171 NS16550_init(serial_ports[1], clock_divisor);
173 #ifdef CONFIG_SYS_NS16550_COM3
174 clock_divisor = calc_divisor(serial_ports[2]);
175 NS16550_init(serial_ports[2], clock_divisor);
177 #ifdef CONFIG_SYS_NS16550_COM4
178 clock_divisor = calc_divisor(serial_ports[3]);
179 NS16550_init(serial_ports[3], clock_divisor);
187 _serial_putc(const char c,const int port)
190 NS16550_putc(PORT, '\r');
192 NS16550_putc(PORT, c);
196 _serial_putc_raw(const char c,const int port)
198 NS16550_putc(PORT, c);
202 _serial_puts (const char *s,const int port)
205 _serial_putc (*s++,port);
211 _serial_getc(const int port)
213 return NS16550_getc(PORT);
217 _serial_tstc(const int port)
219 return NS16550_tstc(PORT);
223 _serial_setbrg (const int port)
227 clock_divisor = calc_divisor(PORT);
228 NS16550_reinit(PORT, clock_divisor);
231 #if defined(CONFIG_SERIAL_MULTI)
233 serial_putc_dev(unsigned int dev_index,const char c)
235 _serial_putc(c,dev_index);
239 serial_putc(const char c)
241 _serial_putc(c,CONFIG_CONS_INDEX);
245 #if defined(CONFIG_SERIAL_MULTI)
247 serial_putc_raw_dev(unsigned int dev_index,const char c)
249 _serial_putc_raw(c,dev_index);
253 serial_putc_raw(const char c)
255 _serial_putc_raw(c,CONFIG_CONS_INDEX);
259 #if defined(CONFIG_SERIAL_MULTI)
261 serial_puts_dev(unsigned int dev_index,const char *s)
263 _serial_puts(s,dev_index);
267 serial_puts(const char *s)
269 _serial_puts(s,CONFIG_CONS_INDEX);
273 #if defined(CONFIG_SERIAL_MULTI)
275 serial_getc_dev(unsigned int dev_index)
277 return _serial_getc(dev_index);
283 return _serial_getc(CONFIG_CONS_INDEX);
287 #if defined(CONFIG_SERIAL_MULTI)
289 serial_tstc_dev(unsigned int dev_index)
291 return _serial_tstc(dev_index);
297 return _serial_tstc(CONFIG_CONS_INDEX);
301 #if defined(CONFIG_SERIAL_MULTI)
303 serial_setbrg_dev(unsigned int dev_index)
305 _serial_setbrg(dev_index);
311 _serial_setbrg(CONFIG_CONS_INDEX);
315 #if defined(CONFIG_SERIAL_MULTI)
317 DECLARE_ESERIAL_FUNCTIONS(1);
318 struct serial_device eserial1_device =
319 INIT_ESERIAL_STRUCTURE(1, "eserial0");
320 DECLARE_ESERIAL_FUNCTIONS(2);
321 struct serial_device eserial2_device =
322 INIT_ESERIAL_STRUCTURE(2, "eserial1");
323 DECLARE_ESERIAL_FUNCTIONS(3);
324 struct serial_device eserial3_device =
325 INIT_ESERIAL_STRUCTURE(3, "eserial2");
326 DECLARE_ESERIAL_FUNCTIONS(4);
327 struct serial_device eserial4_device =
328 INIT_ESERIAL_STRUCTURE(4, "eserial3");
330 __weak struct serial_device *default_serial_console(void)
332 #if CONFIG_CONS_INDEX == 1
333 return &eserial1_device;
334 #elif CONFIG_CONS_INDEX == 2
335 return &eserial2_device;
336 #elif CONFIG_CONS_INDEX == 3
337 return &eserial3_device;
338 #elif CONFIG_CONS_INDEX == 4
339 return &eserial4_device;
341 #error "Bad CONFIG_CONS_INDEX."
345 #endif /* CONFIG_SERIAL_MULTI */