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,\
119 eserial##port##_setbrg,\
120 eserial##port##_getc,\
121 eserial##port##_tstc,\
122 eserial##port##_putc,\
123 eserial##port##_puts, }
125 #endif /* CONFIG_SERIAL_MULTI */
127 static int calc_divisor (NS16550_t port)
129 #ifdef CONFIG_OMAP1510
130 /* If can't cleanly clock 115200 set div to 1 */
131 if ((CONFIG_SYS_NS16550_CLK == 12000000) && (gd->baudrate == 115200)) {
132 port->osc_12m_sel = OSC_12M_SEL; /* enable 6.5 * divisor */
133 return (1); /* return 1 for base divisor */
135 port->osc_12m_sel = 0; /* clear if previsouly set */
137 #ifdef CONFIG_OMAP1610
138 /* If can't cleanly clock 115200 set div to 1 */
139 if ((CONFIG_SYS_NS16550_CLK == 48000000) && (gd->baudrate == 115200)) {
140 return (26); /* return 26 for base divisor */
145 #define MODE_X_DIV 13
147 #define MODE_X_DIV 16
150 /* Compute divisor value. Normally, we should simply return:
151 * CONFIG_SYS_NS16550_CLK) / MODE_X_DIV / gd->baudrate
152 * but we need to round that value by adding 0.5.
153 * Rounding is especially important at high baud rates.
155 return (CONFIG_SYS_NS16550_CLK + (gd->baudrate * (MODE_X_DIV / 2))) /
156 (MODE_X_DIV * gd->baudrate);
159 #if !defined(CONFIG_SERIAL_MULTI)
160 int serial_init (void)
164 #ifdef CONFIG_NS87308
165 initialise_ns87308();
168 #ifdef CONFIG_SYS_NS16550_COM1
169 clock_divisor = calc_divisor(serial_ports[0]);
170 NS16550_init(serial_ports[0], clock_divisor);
172 #ifdef CONFIG_SYS_NS16550_COM2
173 clock_divisor = calc_divisor(serial_ports[1]);
174 NS16550_init(serial_ports[1], clock_divisor);
176 #ifdef CONFIG_SYS_NS16550_COM3
177 clock_divisor = calc_divisor(serial_ports[2]);
178 NS16550_init(serial_ports[2], clock_divisor);
180 #ifdef CONFIG_SYS_NS16550_COM4
181 clock_divisor = calc_divisor(serial_ports[3]);
182 NS16550_init(serial_ports[3], clock_divisor);
190 _serial_putc(const char c,const int port)
193 NS16550_putc(PORT, '\r');
195 NS16550_putc(PORT, c);
199 _serial_putc_raw(const char c,const int port)
201 NS16550_putc(PORT, c);
205 _serial_puts (const char *s,const int port)
208 _serial_putc (*s++,port);
214 _serial_getc(const int port)
216 return NS16550_getc(PORT);
220 _serial_tstc(const int port)
222 return NS16550_tstc(PORT);
226 _serial_setbrg (const int port)
230 clock_divisor = calc_divisor(PORT);
231 NS16550_reinit(PORT, clock_divisor);
234 #if defined(CONFIG_SERIAL_MULTI)
236 serial_putc_dev(unsigned int dev_index,const char c)
238 _serial_putc(c,dev_index);
242 serial_putc(const char c)
244 _serial_putc(c,CONFIG_CONS_INDEX);
248 #if defined(CONFIG_SERIAL_MULTI)
250 serial_putc_raw_dev(unsigned int dev_index,const char c)
252 _serial_putc_raw(c,dev_index);
256 serial_putc_raw(const char c)
258 _serial_putc_raw(c,CONFIG_CONS_INDEX);
262 #if defined(CONFIG_SERIAL_MULTI)
264 serial_puts_dev(unsigned int dev_index,const char *s)
266 _serial_puts(s,dev_index);
270 serial_puts(const char *s)
272 _serial_puts(s,CONFIG_CONS_INDEX);
276 #if defined(CONFIG_SERIAL_MULTI)
278 serial_getc_dev(unsigned int dev_index)
280 return _serial_getc(dev_index);
286 return _serial_getc(CONFIG_CONS_INDEX);
290 #if defined(CONFIG_SERIAL_MULTI)
292 serial_tstc_dev(unsigned int dev_index)
294 return _serial_tstc(dev_index);
300 return _serial_tstc(CONFIG_CONS_INDEX);
304 #if defined(CONFIG_SERIAL_MULTI)
306 serial_setbrg_dev(unsigned int dev_index)
308 _serial_setbrg(dev_index);
314 _serial_setbrg(CONFIG_CONS_INDEX);
318 #if defined(CONFIG_SERIAL_MULTI)
320 DECLARE_ESERIAL_FUNCTIONS(1);
321 struct serial_device eserial1_device =
322 INIT_ESERIAL_STRUCTURE(1,"eserial0","EUART1");
323 DECLARE_ESERIAL_FUNCTIONS(2);
324 struct serial_device eserial2_device =
325 INIT_ESERIAL_STRUCTURE(2,"eserial1","EUART2");
326 DECLARE_ESERIAL_FUNCTIONS(3);
327 struct serial_device eserial3_device =
328 INIT_ESERIAL_STRUCTURE(3,"eserial2","EUART3");
329 DECLARE_ESERIAL_FUNCTIONS(4);
330 struct serial_device eserial4_device =
331 INIT_ESERIAL_STRUCTURE(4,"eserial3","EUART4");
332 #endif /* CONFIG_SERIAL_MULTI */