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>
34 DECLARE_GLOBAL_DATA_PTR;
36 #if !defined(CONFIG_CONS_INDEX)
37 #elif (CONFIG_CONS_INDEX < 1) || (CONFIG_CONS_INDEX > 6)
38 #error "Invalid console index value."
41 #if CONFIG_CONS_INDEX == 1 && !defined(CONFIG_SYS_NS16550_COM1)
42 #error "Console port 1 defined but not configured."
43 #elif CONFIG_CONS_INDEX == 2 && !defined(CONFIG_SYS_NS16550_COM2)
44 #error "Console port 2 defined but not configured."
45 #elif CONFIG_CONS_INDEX == 3 && !defined(CONFIG_SYS_NS16550_COM3)
46 #error "Console port 3 defined but not configured."
47 #elif CONFIG_CONS_INDEX == 4 && !defined(CONFIG_SYS_NS16550_COM4)
48 #error "Console port 4 defined but not configured."
49 #elif CONFIG_CONS_INDEX == 5 && !defined(CONFIG_SYS_NS16550_COM5)
50 #error "Console port 5 defined but not configured."
51 #elif CONFIG_CONS_INDEX == 6 && !defined(CONFIG_SYS_NS16550_COM6)
52 #error "Console port 6 defined but not configured."
55 /* Note: The port number specified in the functions is 1 based.
56 * the array is 0 based.
58 static NS16550_t serial_ports[6] = {
59 #ifdef CONFIG_SYS_NS16550_COM1
60 (NS16550_t)CONFIG_SYS_NS16550_COM1,
64 #ifdef CONFIG_SYS_NS16550_COM2
65 (NS16550_t)CONFIG_SYS_NS16550_COM2,
69 #ifdef CONFIG_SYS_NS16550_COM3
70 (NS16550_t)CONFIG_SYS_NS16550_COM3,
74 #ifdef CONFIG_SYS_NS16550_COM4
75 (NS16550_t)CONFIG_SYS_NS16550_COM4,
79 #ifdef CONFIG_SYS_NS16550_COM5
80 (NS16550_t)CONFIG_SYS_NS16550_COM5,
84 #ifdef CONFIG_SYS_NS16550_COM6
85 (NS16550_t)CONFIG_SYS_NS16550_COM6
91 #define PORT serial_ports[port-1]
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 .start = eserial##port##_init, \
116 .setbrg = eserial##port##_setbrg, \
117 .getc = eserial##port##_getc, \
118 .tstc = eserial##port##_tstc, \
119 .putc = eserial##port##_putc, \
120 .puts = eserial##port##_puts, \
123 static int calc_divisor (NS16550_t port)
125 #ifdef CONFIG_OMAP1510
126 /* If can't cleanly clock 115200 set div to 1 */
127 if ((CONFIG_SYS_NS16550_CLK == 12000000) && (gd->baudrate == 115200)) {
128 port->osc_12m_sel = OSC_12M_SEL; /* enable 6.5 * divisor */
129 return (1); /* return 1 for base divisor */
131 port->osc_12m_sel = 0; /* clear if previsouly set */
133 #ifdef CONFIG_OMAP1610
134 /* If can't cleanly clock 115200 set div to 1 */
135 if ((CONFIG_SYS_NS16550_CLK == 48000000) && (gd->baudrate == 115200)) {
136 return (26); /* return 26 for base divisor */
141 #define MODE_X_DIV 13
143 #define MODE_X_DIV 16
146 /* Compute divisor value. Normally, we should simply return:
147 * CONFIG_SYS_NS16550_CLK) / MODE_X_DIV / gd->baudrate
148 * but we need to round that value by adding 0.5.
149 * Rounding is especially important at high baud rates.
151 return (CONFIG_SYS_NS16550_CLK + (gd->baudrate * (MODE_X_DIV / 2))) /
152 (MODE_X_DIV * gd->baudrate);
156 _serial_putc(const char c,const int port)
159 NS16550_putc(PORT, '\r');
161 NS16550_putc(PORT, c);
165 _serial_putc_raw(const char c,const int port)
167 NS16550_putc(PORT, c);
171 _serial_puts (const char *s,const int port)
174 _serial_putc (*s++,port);
180 _serial_getc(const int port)
182 return NS16550_getc(PORT);
186 _serial_tstc(const int port)
188 return NS16550_tstc(PORT);
192 _serial_setbrg (const int port)
196 clock_divisor = calc_divisor(PORT);
197 NS16550_reinit(PORT, clock_divisor);
201 serial_putc_dev(unsigned int dev_index,const char c)
203 _serial_putc(c,dev_index);
207 serial_putc_raw_dev(unsigned int dev_index,const char c)
209 _serial_putc_raw(c,dev_index);
213 serial_puts_dev(unsigned int dev_index,const char *s)
215 _serial_puts(s,dev_index);
219 serial_getc_dev(unsigned int dev_index)
221 return _serial_getc(dev_index);
225 serial_tstc_dev(unsigned int dev_index)
227 return _serial_tstc(dev_index);
231 serial_setbrg_dev(unsigned int dev_index)
233 _serial_setbrg(dev_index);
236 DECLARE_ESERIAL_FUNCTIONS(1);
237 struct serial_device eserial1_device =
238 INIT_ESERIAL_STRUCTURE(1, "eserial0");
239 DECLARE_ESERIAL_FUNCTIONS(2);
240 struct serial_device eserial2_device =
241 INIT_ESERIAL_STRUCTURE(2, "eserial1");
242 DECLARE_ESERIAL_FUNCTIONS(3);
243 struct serial_device eserial3_device =
244 INIT_ESERIAL_STRUCTURE(3, "eserial2");
245 DECLARE_ESERIAL_FUNCTIONS(4);
246 struct serial_device eserial4_device =
247 INIT_ESERIAL_STRUCTURE(4, "eserial3");
248 DECLARE_ESERIAL_FUNCTIONS(5);
249 struct serial_device eserial5_device =
250 INIT_ESERIAL_STRUCTURE(5, "eserial4");
251 DECLARE_ESERIAL_FUNCTIONS(6);
252 struct serial_device eserial6_device =
253 INIT_ESERIAL_STRUCTURE(6, "eserial5");
255 __weak struct serial_device *default_serial_console(void)
257 #if CONFIG_CONS_INDEX == 1
258 return &eserial1_device;
259 #elif CONFIG_CONS_INDEX == 2
260 return &eserial2_device;
261 #elif CONFIG_CONS_INDEX == 3
262 return &eserial3_device;
263 #elif CONFIG_CONS_INDEX == 4
264 return &eserial4_device;
265 #elif CONFIG_CONS_INDEX == 5
266 return &eserial5_device;
267 #elif CONFIG_CONS_INDEX == 6
268 return &eserial6_device;
270 #error "Bad CONFIG_CONS_INDEX."
274 void ns16550_serial_initialize(void)
276 #if defined(CONFIG_SYS_NS16550_COM1)
277 serial_register(&eserial1_device);
279 #if defined(CONFIG_SYS_NS16550_COM2)
280 serial_register(&eserial2_device);
282 #if defined(CONFIG_SYS_NS16550_COM3)
283 serial_register(&eserial3_device);
285 #if defined(CONFIG_SYS_NS16550_COM4)
286 serial_register(&eserial4_device);
288 #if defined(CONFIG_SYS_NS16550_COM5)
289 serial_register(&eserial5_device);
291 #if defined(CONFIG_SYS_NS16550_COM6)
292 serial_register(&eserial6_device);