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,
30 #ifdef CONFIG_KIRKWOOD
31 #include <asm/arch/kirkwood.h>
34 #if defined (CONFIG_SERIAL_MULTI)
38 DECLARE_GLOBAL_DATA_PTR;
40 #if !defined(CONFIG_CONS_INDEX)
41 #if defined (CONFIG_SERIAL_MULTI)
42 /* with CONFIG_SERIAL_MULTI we might have no console
46 #error "No console index specified."
47 #endif /* CONFIG_SERIAL_MULTI */
48 #elif (CONFIG_CONS_INDEX < 1) || (CONFIG_CONS_INDEX > 4)
49 #error "Invalid console index value."
52 #if CONFIG_CONS_INDEX == 1 && !defined(CONFIG_SYS_NS16550_COM1)
53 #error "Console port 1 defined but not configured."
54 #elif CONFIG_CONS_INDEX == 2 && !defined(CONFIG_SYS_NS16550_COM2)
55 #error "Console port 2 defined but not configured."
56 #elif CONFIG_CONS_INDEX == 3 && !defined(CONFIG_SYS_NS16550_COM3)
57 #error "Console port 3 defined but not configured."
58 #elif CONFIG_CONS_INDEX == 4 && !defined(CONFIG_SYS_NS16550_COM4)
59 #error "Console port 4 defined but not configured."
62 /* Note: The port number specified in the functions is 1 based.
63 * the array is 0 based.
65 static NS16550_t serial_ports[4] = {
66 #ifdef CONFIG_SYS_NS16550_COM1
67 (NS16550_t)CONFIG_SYS_NS16550_COM1,
71 #ifdef CONFIG_SYS_NS16550_COM2
72 (NS16550_t)CONFIG_SYS_NS16550_COM2,
76 #ifdef CONFIG_SYS_NS16550_COM3
77 (NS16550_t)CONFIG_SYS_NS16550_COM3,
81 #ifdef CONFIG_SYS_NS16550_COM4
82 (NS16550_t)CONFIG_SYS_NS16550_COM4
88 #define PORT serial_ports[port-1]
89 #if defined(CONFIG_CONS_INDEX)
90 #define CONSOLE (serial_ports[CONFIG_CONS_INDEX-1])
93 #if defined(CONFIG_SERIAL_MULTI)
95 /* Multi serial device functions */
96 #define DECLARE_ESERIAL_FUNCTIONS(port) \
97 int eserial##port##_init (void) {\
99 clock_divisor = calc_divisor(serial_ports[port-1]); \
100 NS16550_init(serial_ports[port-1], clock_divisor); \
102 void eserial##port##_setbrg (void) {\
103 serial_setbrg_dev(port);}\
104 int eserial##port##_getc (void) {\
105 return serial_getc_dev(port);}\
106 int eserial##port##_tstc (void) {\
107 return serial_tstc_dev(port);}\
108 void eserial##port##_putc (const char c) {\
109 serial_putc_dev(port, c);}\
110 void eserial##port##_puts (const char *s) {\
111 serial_puts_dev(port, s);}
113 /* Serial device descriptor */
114 #define INIT_ESERIAL_STRUCTURE(port,name,bus) {\
117 eserial##port##_init,\
118 eserial##port##_setbrg,\
119 eserial##port##_getc,\
120 eserial##port##_tstc,\
121 eserial##port##_putc,\
122 eserial##port##_puts, }
124 #endif /* CONFIG_SERIAL_MULTI */
126 static int calc_divisor (NS16550_t port)
128 #ifdef CONFIG_OMAP1510
129 /* If can't cleanly clock 115200 set div to 1 */
130 if ((CONFIG_SYS_NS16550_CLK == 12000000) && (gd->baudrate == 115200)) {
131 port->osc_12m_sel = OSC_12M_SEL; /* enable 6.5 * divisor */
132 return (1); /* return 1 for base divisor */
134 port->osc_12m_sel = 0; /* clear if previsouly set */
136 #ifdef CONFIG_OMAP1610
137 /* If can't cleanly clock 115200 set div to 1 */
138 if ((CONFIG_SYS_NS16550_CLK == 48000000) && (gd->baudrate == 115200)) {
139 return (26); /* return 26 for base divisor */
144 #define MODE_X_DIV 13
146 #define MODE_X_DIV 16
149 /* Compute divisor value. Normally, we should simply return:
150 * CONFIG_SYS_NS16550_CLK) / MODE_X_DIV / gd->baudrate
151 * but we need to round that value by adding 0.5.
152 * Rounding is especially important at high baud rates.
154 return (CONFIG_SYS_NS16550_CLK + (gd->baudrate * (MODE_X_DIV / 2))) /
155 (MODE_X_DIV * gd->baudrate);
158 #if !defined(CONFIG_SERIAL_MULTI)
159 int serial_init (void)
163 #ifdef CONFIG_NS87308
164 initialise_ns87308();
167 #ifdef CONFIG_SYS_NS16550_COM1
168 clock_divisor = calc_divisor(serial_ports[0]);
169 NS16550_init(serial_ports[0], clock_divisor);
171 #ifdef CONFIG_SYS_NS16550_COM2
172 clock_divisor = calc_divisor(serial_ports[1]);
173 NS16550_init(serial_ports[1], clock_divisor);
175 #ifdef CONFIG_SYS_NS16550_COM3
176 clock_divisor = calc_divisor(serial_ports[2]);
177 NS16550_init(serial_ports[2], clock_divisor);
179 #ifdef CONFIG_SYS_NS16550_COM4
180 clock_divisor = calc_divisor(serial_ports[3]);
181 NS16550_init(serial_ports[3], clock_divisor);
189 _serial_putc(const char c,const int port)
192 NS16550_putc(PORT, '\r');
194 NS16550_putc(PORT, c);
198 _serial_putc_raw(const char c,const int port)
200 NS16550_putc(PORT, c);
204 _serial_puts (const char *s,const int port)
207 _serial_putc (*s++,port);
213 _serial_getc(const int port)
215 return NS16550_getc(PORT);
219 _serial_tstc(const int port)
221 return NS16550_tstc(PORT);
225 _serial_setbrg (const int port)
229 clock_divisor = calc_divisor(PORT);
230 NS16550_reinit(PORT, clock_divisor);
233 #if defined(CONFIG_SERIAL_MULTI)
235 serial_putc_dev(unsigned int dev_index,const char c)
237 _serial_putc(c,dev_index);
241 serial_putc(const char c)
243 _serial_putc(c,CONFIG_CONS_INDEX);
247 #if defined(CONFIG_SERIAL_MULTI)
249 serial_putc_raw_dev(unsigned int dev_index,const char c)
251 _serial_putc_raw(c,dev_index);
255 serial_putc_raw(const char c)
257 _serial_putc_raw(c,CONFIG_CONS_INDEX);
261 #if defined(CONFIG_SERIAL_MULTI)
263 serial_puts_dev(unsigned int dev_index,const char *s)
265 _serial_puts(s,dev_index);
269 serial_puts(const char *s)
271 _serial_puts(s,CONFIG_CONS_INDEX);
275 #if defined(CONFIG_SERIAL_MULTI)
277 serial_getc_dev(unsigned int dev_index)
279 return _serial_getc(dev_index);
285 return _serial_getc(CONFIG_CONS_INDEX);
289 #if defined(CONFIG_SERIAL_MULTI)
291 serial_tstc_dev(unsigned int dev_index)
293 return _serial_tstc(dev_index);
299 return _serial_tstc(CONFIG_CONS_INDEX);
303 #if defined(CONFIG_SERIAL_MULTI)
305 serial_setbrg_dev(unsigned int dev_index)
307 _serial_setbrg(dev_index);
313 _serial_setbrg(CONFIG_CONS_INDEX);
317 #if defined(CONFIG_SERIAL_MULTI)
319 DECLARE_ESERIAL_FUNCTIONS(1);
320 struct serial_device eserial1_device =
321 INIT_ESERIAL_STRUCTURE(1,"eserial0","EUART1");
322 DECLARE_ESERIAL_FUNCTIONS(2);
323 struct serial_device eserial2_device =
324 INIT_ESERIAL_STRUCTURE(2,"eserial1","EUART2");
325 DECLARE_ESERIAL_FUNCTIONS(3);
326 struct serial_device eserial3_device =
327 INIT_ESERIAL_STRUCTURE(3,"eserial2","EUART3");
328 DECLARE_ESERIAL_FUNCTIONS(4);
329 struct serial_device eserial4_device =
330 INIT_ESERIAL_STRUCTURE(4,"eserial3","EUART4");
331 #endif /* CONFIG_SERIAL_MULTI */