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 #ifndef CONFIG_NS16550_MIN_FUNCTIONS
36 DECLARE_GLOBAL_DATA_PTR;
38 #if !defined(CONFIG_CONS_INDEX)
39 #elif (CONFIG_CONS_INDEX < 1) || (CONFIG_CONS_INDEX > 6)
40 #error "Invalid console index value."
43 #if CONFIG_CONS_INDEX == 1 && !defined(CONFIG_SYS_NS16550_COM1)
44 #error "Console port 1 defined but not configured."
45 #elif CONFIG_CONS_INDEX == 2 && !defined(CONFIG_SYS_NS16550_COM2)
46 #error "Console port 2 defined but not configured."
47 #elif CONFIG_CONS_INDEX == 3 && !defined(CONFIG_SYS_NS16550_COM3)
48 #error "Console port 3 defined but not configured."
49 #elif CONFIG_CONS_INDEX == 4 && !defined(CONFIG_SYS_NS16550_COM4)
50 #error "Console port 4 defined but not configured."
51 #elif CONFIG_CONS_INDEX == 5 && !defined(CONFIG_SYS_NS16550_COM5)
52 #error "Console port 5 defined but not configured."
53 #elif CONFIG_CONS_INDEX == 6 && !defined(CONFIG_SYS_NS16550_COM6)
54 #error "Console port 6 defined but not configured."
57 /* Note: The port number specified in the functions is 1 based.
58 * the array is 0 based.
60 static NS16550_t serial_ports[6] = {
61 #ifdef CONFIG_SYS_NS16550_COM1
62 (NS16550_t)CONFIG_SYS_NS16550_COM1,
66 #ifdef CONFIG_SYS_NS16550_COM2
67 (NS16550_t)CONFIG_SYS_NS16550_COM2,
71 #ifdef CONFIG_SYS_NS16550_COM3
72 (NS16550_t)CONFIG_SYS_NS16550_COM3,
76 #ifdef CONFIG_SYS_NS16550_COM4
77 (NS16550_t)CONFIG_SYS_NS16550_COM4,
81 #ifdef CONFIG_SYS_NS16550_COM5
82 (NS16550_t)CONFIG_SYS_NS16550_COM5,
86 #ifdef CONFIG_SYS_NS16550_COM6
87 (NS16550_t)CONFIG_SYS_NS16550_COM6
93 #define PORT serial_ports[port-1]
95 /* Multi serial device functions */
96 #define DECLARE_ESERIAL_FUNCTIONS(port) \
97 static int eserial##port##_init(void) \
100 clock_divisor = calc_divisor(serial_ports[port-1]); \
101 NS16550_init(serial_ports[port-1], clock_divisor); \
104 static void eserial##port##_setbrg(void) \
106 serial_setbrg_dev(port); \
108 static int eserial##port##_getc(void) \
110 return serial_getc_dev(port); \
112 static int eserial##port##_tstc(void) \
114 return serial_tstc_dev(port); \
116 static void eserial##port##_putc(const char c) \
118 serial_putc_dev(port, c); \
120 static void eserial##port##_puts(const char *s) \
122 serial_puts_dev(port, s); \
125 /* Serial device descriptor */
126 #define INIT_ESERIAL_STRUCTURE(port, __name) { \
128 .start = eserial##port##_init, \
130 .setbrg = eserial##port##_setbrg, \
131 .getc = eserial##port##_getc, \
132 .tstc = eserial##port##_tstc, \
133 .putc = eserial##port##_putc, \
134 .puts = eserial##port##_puts, \
137 static int calc_divisor (NS16550_t port)
139 #ifdef CONFIG_OMAP1510
140 /* If can't cleanly clock 115200 set div to 1 */
141 if ((CONFIG_SYS_NS16550_CLK == 12000000) && (gd->baudrate == 115200)) {
142 port->osc_12m_sel = OSC_12M_SEL; /* enable 6.5 * divisor */
143 return (1); /* return 1 for base divisor */
145 port->osc_12m_sel = 0; /* clear if previsouly set */
147 #ifdef CONFIG_OMAP1610
148 /* If can't cleanly clock 115200 set div to 1 */
149 if ((CONFIG_SYS_NS16550_CLK == 48000000) && (gd->baudrate == 115200)) {
150 return (26); /* return 26 for base divisor */
155 #define MODE_X_DIV 13
157 #define MODE_X_DIV 16
160 /* Compute divisor value. Normally, we should simply return:
161 * CONFIG_SYS_NS16550_CLK) / MODE_X_DIV / gd->baudrate
162 * but we need to round that value by adding 0.5.
163 * Rounding is especially important at high baud rates.
165 return (CONFIG_SYS_NS16550_CLK + (gd->baudrate * (MODE_X_DIV / 2))) /
166 (MODE_X_DIV * gd->baudrate);
170 _serial_putc(const char c,const int port)
173 NS16550_putc(PORT, '\r');
175 NS16550_putc(PORT, c);
179 _serial_putc_raw(const char c,const int port)
181 NS16550_putc(PORT, c);
185 _serial_puts (const char *s,const int port)
188 _serial_putc (*s++,port);
194 _serial_getc(const int port)
196 return NS16550_getc(PORT);
200 _serial_tstc(const int port)
202 return NS16550_tstc(PORT);
206 _serial_setbrg (const int port)
210 clock_divisor = calc_divisor(PORT);
211 NS16550_reinit(PORT, clock_divisor);
215 serial_putc_dev(unsigned int dev_index,const char c)
217 _serial_putc(c,dev_index);
221 serial_putc_raw_dev(unsigned int dev_index,const char c)
223 _serial_putc_raw(c,dev_index);
227 serial_puts_dev(unsigned int dev_index,const char *s)
229 _serial_puts(s,dev_index);
233 serial_getc_dev(unsigned int dev_index)
235 return _serial_getc(dev_index);
239 serial_tstc_dev(unsigned int dev_index)
241 return _serial_tstc(dev_index);
245 serial_setbrg_dev(unsigned int dev_index)
247 _serial_setbrg(dev_index);
250 #if defined(CONFIG_SYS_NS16550_COM1)
251 DECLARE_ESERIAL_FUNCTIONS(1);
252 struct serial_device eserial1_device =
253 INIT_ESERIAL_STRUCTURE(1, "eserial0");
255 #if defined(CONFIG_SYS_NS16550_COM2)
256 DECLARE_ESERIAL_FUNCTIONS(2);
257 struct serial_device eserial2_device =
258 INIT_ESERIAL_STRUCTURE(2, "eserial1");
260 #if defined(CONFIG_SYS_NS16550_COM3)
261 DECLARE_ESERIAL_FUNCTIONS(3);
262 struct serial_device eserial3_device =
263 INIT_ESERIAL_STRUCTURE(3, "eserial2");
265 #if defined(CONFIG_SYS_NS16550_COM4)
266 DECLARE_ESERIAL_FUNCTIONS(4);
267 struct serial_device eserial4_device =
268 INIT_ESERIAL_STRUCTURE(4, "eserial3");
270 #if defined(CONFIG_SYS_NS16550_COM5)
271 DECLARE_ESERIAL_FUNCTIONS(5);
272 struct serial_device eserial5_device =
273 INIT_ESERIAL_STRUCTURE(5, "eserial4");
275 #if defined(CONFIG_SYS_NS16550_COM6)
276 DECLARE_ESERIAL_FUNCTIONS(6);
277 struct serial_device eserial6_device =
278 INIT_ESERIAL_STRUCTURE(6, "eserial5");
281 __weak struct serial_device *default_serial_console(void)
283 #if CONFIG_CONS_INDEX == 1
284 return &eserial1_device;
285 #elif CONFIG_CONS_INDEX == 2
286 return &eserial2_device;
287 #elif CONFIG_CONS_INDEX == 3
288 return &eserial3_device;
289 #elif CONFIG_CONS_INDEX == 4
290 return &eserial4_device;
291 #elif CONFIG_CONS_INDEX == 5
292 return &eserial5_device;
293 #elif CONFIG_CONS_INDEX == 6
294 return &eserial6_device;
296 #error "Bad CONFIG_CONS_INDEX."
300 void ns16550_serial_initialize(void)
302 #if defined(CONFIG_SYS_NS16550_COM1)
303 serial_register(&eserial1_device);
305 #if defined(CONFIG_SYS_NS16550_COM2)
306 serial_register(&eserial2_device);
308 #if defined(CONFIG_SYS_NS16550_COM3)
309 serial_register(&eserial3_device);
311 #if defined(CONFIG_SYS_NS16550_COM4)
312 serial_register(&eserial4_device);
314 #if defined(CONFIG_SYS_NS16550_COM5)
315 serial_register(&eserial5_device);
317 #if defined(CONFIG_SYS_NS16550_COM6)
318 serial_register(&eserial6_device);
322 #endif /* !CONFIG_NS16550_MIN_FUNCTIONS */