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 > 4)
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."
51 /* Note: The port number specified in the functions is 1 based.
52 * the array is 0 based.
54 static NS16550_t serial_ports[4] = {
55 #ifdef CONFIG_SYS_NS16550_COM1
56 (NS16550_t)CONFIG_SYS_NS16550_COM1,
60 #ifdef CONFIG_SYS_NS16550_COM2
61 (NS16550_t)CONFIG_SYS_NS16550_COM2,
65 #ifdef CONFIG_SYS_NS16550_COM3
66 (NS16550_t)CONFIG_SYS_NS16550_COM3,
70 #ifdef CONFIG_SYS_NS16550_COM4
71 (NS16550_t)CONFIG_SYS_NS16550_COM4
77 #define PORT serial_ports[port-1]
79 /* Multi serial device functions */
80 #define DECLARE_ESERIAL_FUNCTIONS(port) \
81 static int eserial##port##_init(void) \
84 clock_divisor = calc_divisor(serial_ports[port-1]); \
85 NS16550_init(serial_ports[port-1], clock_divisor); \
88 static void eserial##port##_setbrg(void) \
90 serial_setbrg_dev(port); \
92 static int eserial##port##_getc(void) \
94 return serial_getc_dev(port); \
96 static int eserial##port##_tstc(void) \
98 return serial_tstc_dev(port); \
100 static void eserial##port##_putc(const char c) \
102 serial_putc_dev(port, c); \
104 static void eserial##port##_puts(const char *s) \
106 serial_puts_dev(port, s); \
109 /* Serial device descriptor */
110 #define INIT_ESERIAL_STRUCTURE(port, __name) { \
112 .start = eserial##port##_init, \
114 .setbrg = eserial##port##_setbrg, \
115 .getc = eserial##port##_getc, \
116 .tstc = eserial##port##_tstc, \
117 .putc = eserial##port##_putc, \
118 .puts = eserial##port##_puts, \
121 static int calc_divisor (NS16550_t port)
123 #ifdef CONFIG_OMAP1510
124 /* If can't cleanly clock 115200 set div to 1 */
125 if ((CONFIG_SYS_NS16550_CLK == 12000000) && (gd->baudrate == 115200)) {
126 port->osc_12m_sel = OSC_12M_SEL; /* enable 6.5 * divisor */
127 return (1); /* return 1 for base divisor */
129 port->osc_12m_sel = 0; /* clear if previsouly set */
131 #ifdef CONFIG_OMAP1610
132 /* If can't cleanly clock 115200 set div to 1 */
133 if ((CONFIG_SYS_NS16550_CLK == 48000000) && (gd->baudrate == 115200)) {
134 return (26); /* return 26 for base divisor */
139 #define MODE_X_DIV 13
141 #define MODE_X_DIV 16
144 /* Compute divisor value. Normally, we should simply return:
145 * CONFIG_SYS_NS16550_CLK) / MODE_X_DIV / gd->baudrate
146 * but we need to round that value by adding 0.5.
147 * Rounding is especially important at high baud rates.
149 return (CONFIG_SYS_NS16550_CLK + (gd->baudrate * (MODE_X_DIV / 2))) /
150 (MODE_X_DIV * gd->baudrate);
154 _serial_putc(const char c,const int port)
157 NS16550_putc(PORT, '\r');
159 NS16550_putc(PORT, c);
163 _serial_putc_raw(const char c,const int port)
165 NS16550_putc(PORT, c);
169 _serial_puts (const char *s,const int port)
172 _serial_putc (*s++,port);
178 _serial_getc(const int port)
180 return NS16550_getc(PORT);
184 _serial_tstc(const int port)
186 return NS16550_tstc(PORT);
190 _serial_setbrg (const int port)
194 clock_divisor = calc_divisor(PORT);
195 NS16550_reinit(PORT, clock_divisor);
199 serial_putc_dev(unsigned int dev_index,const char c)
201 _serial_putc(c,dev_index);
205 serial_putc_raw_dev(unsigned int dev_index,const char c)
207 _serial_putc_raw(c,dev_index);
211 serial_puts_dev(unsigned int dev_index,const char *s)
213 _serial_puts(s,dev_index);
217 serial_getc_dev(unsigned int dev_index)
219 return _serial_getc(dev_index);
223 serial_tstc_dev(unsigned int dev_index)
225 return _serial_tstc(dev_index);
229 serial_setbrg_dev(unsigned int dev_index)
231 _serial_setbrg(dev_index);
234 DECLARE_ESERIAL_FUNCTIONS(1);
235 struct serial_device eserial1_device =
236 INIT_ESERIAL_STRUCTURE(1, "eserial0");
237 DECLARE_ESERIAL_FUNCTIONS(2);
238 struct serial_device eserial2_device =
239 INIT_ESERIAL_STRUCTURE(2, "eserial1");
240 DECLARE_ESERIAL_FUNCTIONS(3);
241 struct serial_device eserial3_device =
242 INIT_ESERIAL_STRUCTURE(3, "eserial2");
243 DECLARE_ESERIAL_FUNCTIONS(4);
244 struct serial_device eserial4_device =
245 INIT_ESERIAL_STRUCTURE(4, "eserial3");
247 __weak struct serial_device *default_serial_console(void)
249 #if CONFIG_CONS_INDEX == 1
250 return &eserial1_device;
251 #elif CONFIG_CONS_INDEX == 2
252 return &eserial2_device;
253 #elif CONFIG_CONS_INDEX == 3
254 return &eserial3_device;
255 #elif CONFIG_CONS_INDEX == 4
256 return &eserial4_device;
258 #error "Bad CONFIG_CONS_INDEX."
262 void ns16550_serial_initialize(void)
264 #if defined(CONFIG_SYS_NS16550_COM1)
265 serial_register(&eserial1_device);
267 #if defined(CONFIG_SYS_NS16550_COM2)
268 serial_register(&eserial2_device);
270 #if defined(CONFIG_SYS_NS16550_COM3)
271 serial_register(&eserial3_device);
273 #if defined(CONFIG_SYS_NS16550_COM4)
274 serial_register(&eserial4_device);