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]
88 #if defined(CONFIG_SERIAL_MULTI)
90 /* Multi serial device functions */
91 #define DECLARE_ESERIAL_FUNCTIONS(port) \
92 int eserial##port##_init (void) {\
94 clock_divisor = calc_divisor(serial_ports[port-1]); \
95 NS16550_init(serial_ports[port-1], clock_divisor); \
97 void eserial##port##_setbrg (void) {\
98 serial_setbrg_dev(port);}\
99 int eserial##port##_getc (void) {\
100 return serial_getc_dev(port);}\
101 int eserial##port##_tstc (void) {\
102 return serial_tstc_dev(port);}\
103 void eserial##port##_putc (const char c) {\
104 serial_putc_dev(port, c);}\
105 void eserial##port##_puts (const char *s) {\
106 serial_puts_dev(port, s);}
108 /* Serial device descriptor */
109 #define INIT_ESERIAL_STRUCTURE(port, __name) { \
111 .start = eserial##port##_init, \
113 .setbrg = eserial##port##_setbrg, \
114 .getc = eserial##port##_getc, \
115 .tstc = eserial##port##_tstc, \
116 .putc = eserial##port##_putc, \
117 .puts = eserial##port##_puts, \
120 #endif /* CONFIG_SERIAL_MULTI */
122 static int calc_divisor (NS16550_t port)
124 #ifdef CONFIG_OMAP1510
125 /* If can't cleanly clock 115200 set div to 1 */
126 if ((CONFIG_SYS_NS16550_CLK == 12000000) && (gd->baudrate == 115200)) {
127 port->osc_12m_sel = OSC_12M_SEL; /* enable 6.5 * divisor */
128 return (1); /* return 1 for base divisor */
130 port->osc_12m_sel = 0; /* clear if previsouly set */
132 #ifdef CONFIG_OMAP1610
133 /* If can't cleanly clock 115200 set div to 1 */
134 if ((CONFIG_SYS_NS16550_CLK == 48000000) && (gd->baudrate == 115200)) {
135 return (26); /* return 26 for base divisor */
140 #define MODE_X_DIV 13
142 #define MODE_X_DIV 16
145 /* Compute divisor value. Normally, we should simply return:
146 * CONFIG_SYS_NS16550_CLK) / MODE_X_DIV / gd->baudrate
147 * but we need to round that value by adding 0.5.
148 * Rounding is especially important at high baud rates.
150 return (CONFIG_SYS_NS16550_CLK + (gd->baudrate * (MODE_X_DIV / 2))) /
151 (MODE_X_DIV * gd->baudrate);
154 #if !defined(CONFIG_SERIAL_MULTI)
155 int serial_init (void)
159 #ifdef CONFIG_NS87308
160 initialise_ns87308();
163 #ifdef CONFIG_SYS_NS16550_COM1
164 clock_divisor = calc_divisor(serial_ports[0]);
165 NS16550_init(serial_ports[0], clock_divisor);
167 #ifdef CONFIG_SYS_NS16550_COM2
168 clock_divisor = calc_divisor(serial_ports[1]);
169 NS16550_init(serial_ports[1], clock_divisor);
171 #ifdef CONFIG_SYS_NS16550_COM3
172 clock_divisor = calc_divisor(serial_ports[2]);
173 NS16550_init(serial_ports[2], clock_divisor);
175 #ifdef CONFIG_SYS_NS16550_COM4
176 clock_divisor = calc_divisor(serial_ports[3]);
177 NS16550_init(serial_ports[3], clock_divisor);
185 _serial_putc(const char c,const int port)
188 NS16550_putc(PORT, '\r');
190 NS16550_putc(PORT, c);
194 _serial_putc_raw(const char c,const int port)
196 NS16550_putc(PORT, c);
200 _serial_puts (const char *s,const int port)
203 _serial_putc (*s++,port);
209 _serial_getc(const int port)
211 return NS16550_getc(PORT);
215 _serial_tstc(const int port)
217 return NS16550_tstc(PORT);
221 _serial_setbrg (const int port)
225 clock_divisor = calc_divisor(PORT);
226 NS16550_reinit(PORT, clock_divisor);
229 #if defined(CONFIG_SERIAL_MULTI)
231 serial_putc_dev(unsigned int dev_index,const char c)
233 _serial_putc(c,dev_index);
237 serial_putc(const char c)
239 _serial_putc(c,CONFIG_CONS_INDEX);
243 #if defined(CONFIG_SERIAL_MULTI)
245 serial_putc_raw_dev(unsigned int dev_index,const char c)
247 _serial_putc_raw(c,dev_index);
251 serial_putc_raw(const char c)
253 _serial_putc_raw(c,CONFIG_CONS_INDEX);
257 #if defined(CONFIG_SERIAL_MULTI)
259 serial_puts_dev(unsigned int dev_index,const char *s)
261 _serial_puts(s,dev_index);
265 serial_puts(const char *s)
267 _serial_puts(s,CONFIG_CONS_INDEX);
271 #if defined(CONFIG_SERIAL_MULTI)
273 serial_getc_dev(unsigned int dev_index)
275 return _serial_getc(dev_index);
281 return _serial_getc(CONFIG_CONS_INDEX);
285 #if defined(CONFIG_SERIAL_MULTI)
287 serial_tstc_dev(unsigned int dev_index)
289 return _serial_tstc(dev_index);
295 return _serial_tstc(CONFIG_CONS_INDEX);
299 #if defined(CONFIG_SERIAL_MULTI)
301 serial_setbrg_dev(unsigned int dev_index)
303 _serial_setbrg(dev_index);
309 _serial_setbrg(CONFIG_CONS_INDEX);
313 #if defined(CONFIG_SERIAL_MULTI)
315 DECLARE_ESERIAL_FUNCTIONS(1);
316 struct serial_device eserial1_device =
317 INIT_ESERIAL_STRUCTURE(1, "eserial0");
318 DECLARE_ESERIAL_FUNCTIONS(2);
319 struct serial_device eserial2_device =
320 INIT_ESERIAL_STRUCTURE(2, "eserial1");
321 DECLARE_ESERIAL_FUNCTIONS(3);
322 struct serial_device eserial3_device =
323 INIT_ESERIAL_STRUCTURE(3, "eserial2");
324 DECLARE_ESERIAL_FUNCTIONS(4);
325 struct serial_device eserial4_device =
326 INIT_ESERIAL_STRUCTURE(4, "eserial3");
328 __weak struct serial_device *default_serial_console(void)
330 #if CONFIG_CONS_INDEX == 1
331 return &eserial1_device;
332 #elif CONFIG_CONS_INDEX == 2
333 return &eserial2_device;
334 #elif CONFIG_CONS_INDEX == 3
335 return &eserial3_device;
336 #elif CONFIG_CONS_INDEX == 4
337 return &eserial4_device;
339 #error "Bad CONFIG_CONS_INDEX."
343 #endif /* CONFIG_SERIAL_MULTI */