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,
26 #ifdef CFG_NS16550_SERIAL
33 #if defined (CONFIG_SERIAL_MULTI)
37 DECLARE_GLOBAL_DATA_PTR;
39 #if !defined(CONFIG_CONS_INDEX)
40 #if defined (CONFIG_SERIAL_MULTI)
41 /* with CONFIG_SERIAL_MULTI we might have no console
45 #error "No console index specified."
46 #endif /* CONFIG_SERIAL_MULTI */
47 #elif (CONFIG_CONS_INDEX < 1) || (CONFIG_CONS_INDEX > 4)
48 #error "Invalid console index value."
51 #if CONFIG_CONS_INDEX == 1 && !defined(CFG_NS16550_COM1)
52 #error "Console port 1 defined but not configured."
53 #elif CONFIG_CONS_INDEX == 2 && !defined(CFG_NS16550_COM2)
54 #error "Console port 2 defined but not configured."
55 #elif CONFIG_CONS_INDEX == 3 && !defined(CFG_NS16550_COM3)
56 #error "Console port 3 defined but not configured."
57 #elif CONFIG_CONS_INDEX == 4 && !defined(CFG_NS16550_COM4)
58 #error "Console port 4 defined but not configured."
61 /* Note: The port number specified in the functions is 1 based.
62 * the array is 0 based.
64 static NS16550_t serial_ports[4] = {
65 #ifdef CFG_NS16550_COM1
66 (NS16550_t)CFG_NS16550_COM1,
70 #ifdef CFG_NS16550_COM2
71 (NS16550_t)CFG_NS16550_COM2,
75 #ifdef CFG_NS16550_COM3
76 (NS16550_t)CFG_NS16550_COM3,
80 #ifdef CFG_NS16550_COM4
81 (NS16550_t)CFG_NS16550_COM4
87 #define PORT serial_ports[port-1]
88 #if defined(CONFIG_CONS_INDEX)
89 #define CONSOLE (serial_ports[CONFIG_CONS_INDEX-1])
92 #if defined(CONFIG_SERIAL_MULTI)
94 /* Multi serial device functions */
95 #define DECLARE_ESERIAL_FUNCTIONS(port) \
96 int eserial##port##_init (void) {\
98 clock_divisor = calc_divisor(serial_ports[port-1]); \
99 NS16550_init(serial_ports[port-1], clock_divisor); \
101 void eserial##port##_setbrg (void) {\
102 serial_setbrg_dev(port);}\
103 int eserial##port##_getc (void) {\
104 return serial_getc_dev(port);}\
105 int eserial##port##_tstc (void) {\
106 return serial_tstc_dev(port);}\
107 void eserial##port##_putc (const char c) {\
108 serial_putc_dev(port, c);}\
109 void eserial##port##_puts (const char *s) {\
110 serial_puts_dev(port, s);}
112 /* Serial device descriptor */
113 #define INIT_ESERIAL_STRUCTURE(port,name,bus) {\
116 eserial##port##_init,\
117 eserial##port##_setbrg,\
118 eserial##port##_getc,\
119 eserial##port##_tstc,\
120 eserial##port##_putc,\
121 eserial##port##_puts, }
123 #endif /* CONFIG_SERIAL_MULTI */
125 static int calc_divisor (NS16550_t port)
127 uint32_t clk_divisor;
129 #ifdef CONFIG_OMAP1510
130 /* If can't cleanly clock 115200 set div to 1 */
131 if ((CFG_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 ((CFG_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 * CFG_NS16550_CLK) / MODE_X_DIV / gd->baudrate
152 * but we need to round that value by adding 0.5 (2/4).
153 * Rounding is especially important at high baud rates.
155 clk_divisor = (((4 * CFG_NS16550_CLK) /
156 (MODE_X_DIV * gd->baudrate)) + 2) / 4;
158 debug("NS16550 clock divisor = %d\n", clk_divisor);
163 #if !defined(CONFIG_SERIAL_MULTI)
164 int serial_init (void)
169 initialise_ns87308();
172 #ifdef CFG_NS16550_COM1
173 clock_divisor = calc_divisor(serial_ports[0]);
174 NS16550_init(serial_ports[0], clock_divisor);
176 #ifdef CFG_NS16550_COM2
177 clock_divisor = calc_divisor(serial_ports[1]);
178 NS16550_init(serial_ports[1], clock_divisor);
180 #ifdef CFG_NS16550_COM3
181 clock_divisor = calc_divisor(serial_ports[2]);
182 NS16550_init(serial_ports[2], clock_divisor);
184 #ifdef CFG_NS16550_COM4
185 clock_divisor = calc_divisor(serial_ports[3]);
186 NS16550_init(serial_ports[3], clock_divisor);
194 _serial_putc(const char c,const int port)
197 NS16550_putc(PORT, '\r');
199 NS16550_putc(PORT, c);
203 _serial_putc_raw(const char c,const int port)
205 NS16550_putc(PORT, c);
209 _serial_puts (const char *s,const int port)
212 _serial_putc (*s++,port);
218 _serial_getc(const int port)
220 return NS16550_getc(PORT);
224 _serial_tstc(const int port)
226 return NS16550_tstc(PORT);
230 _serial_setbrg (const int port)
234 clock_divisor = calc_divisor(PORT);
235 NS16550_reinit(PORT, clock_divisor);
238 #if defined(CONFIG_SERIAL_MULTI)
240 serial_putc_dev(unsigned int dev_index,const char c)
242 _serial_putc(c,dev_index);
246 serial_putc(const char c)
248 _serial_putc(c,CONFIG_CONS_INDEX);
252 #if defined(CONFIG_SERIAL_MULTI)
254 serial_putc_raw_dev(unsigned int dev_index,const char c)
256 _serial_putc_raw(c,dev_index);
260 serial_putc_raw(const char c)
262 _serial_putc_raw(c,CONFIG_CONS_INDEX);
266 #if defined(CONFIG_SERIAL_MULTI)
268 serial_puts_dev(unsigned int dev_index,const char *s)
270 _serial_puts(s,dev_index);
274 serial_puts(const char *s)
276 _serial_puts(s,CONFIG_CONS_INDEX);
280 #if defined(CONFIG_SERIAL_MULTI)
282 serial_getc_dev(unsigned int dev_index)
284 return _serial_getc(dev_index);
290 return _serial_getc(CONFIG_CONS_INDEX);
294 #if defined(CONFIG_SERIAL_MULTI)
296 serial_tstc_dev(unsigned int dev_index)
298 return _serial_tstc(dev_index);
304 return _serial_tstc(CONFIG_CONS_INDEX);
308 #if defined(CONFIG_SERIAL_MULTI)
310 serial_setbrg_dev(unsigned int dev_index)
312 _serial_setbrg(dev_index);
318 _serial_setbrg(CONFIG_CONS_INDEX);
322 #if defined(CONFIG_SERIAL_MULTI)
324 DECLARE_ESERIAL_FUNCTIONS(1);
325 struct serial_device eserial1_device =
326 INIT_ESERIAL_STRUCTURE(1,"eserial0","EUART1");
327 DECLARE_ESERIAL_FUNCTIONS(2);
328 struct serial_device eserial2_device =
329 INIT_ESERIAL_STRUCTURE(2,"eserial1","EUART2");
330 DECLARE_ESERIAL_FUNCTIONS(3);
331 struct serial_device eserial3_device =
332 INIT_ESERIAL_STRUCTURE(3,"eserial2","EUART3");
333 DECLARE_ESERIAL_FUNCTIONS(4);
334 struct serial_device eserial4_device =
335 INIT_ESERIAL_STRUCTURE(4,"eserial3","EUART4");
336 #endif /* CONFIG_SERIAL_MULTI */