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,
31 #if defined (CONFIG_SERIAL_MULTI)
35 DECLARE_GLOBAL_DATA_PTR;
37 #if !defined(CONFIG_CONS_INDEX)
38 #if defined (CONFIG_SERIAL_MULTI)
39 /* with CONFIG_SERIAL_MULTI we might have no console
43 #error "No console index specified."
44 #endif /* CONFIG_SERIAL_MULTI */
45 #elif (CONFIG_CONS_INDEX < 1) || (CONFIG_CONS_INDEX > 4)
46 #error "Invalid console index value."
49 #if CONFIG_CONS_INDEX == 1 && !defined(CONFIG_SYS_NS16550_COM1)
50 #error "Console port 1 defined but not configured."
51 #elif CONFIG_CONS_INDEX == 2 && !defined(CONFIG_SYS_NS16550_COM2)
52 #error "Console port 2 defined but not configured."
53 #elif CONFIG_CONS_INDEX == 3 && !defined(CONFIG_SYS_NS16550_COM3)
54 #error "Console port 3 defined but not configured."
55 #elif CONFIG_CONS_INDEX == 4 && !defined(CONFIG_SYS_NS16550_COM4)
56 #error "Console port 4 defined but not configured."
59 /* Note: The port number specified in the functions is 1 based.
60 * the array is 0 based.
62 static NS16550_t serial_ports[4] = {
63 #ifdef CONFIG_SYS_NS16550_COM1
64 (NS16550_t)CONFIG_SYS_NS16550_COM1,
68 #ifdef CONFIG_SYS_NS16550_COM2
69 (NS16550_t)CONFIG_SYS_NS16550_COM2,
73 #ifdef CONFIG_SYS_NS16550_COM3
74 (NS16550_t)CONFIG_SYS_NS16550_COM3,
78 #ifdef CONFIG_SYS_NS16550_COM4
79 (NS16550_t)CONFIG_SYS_NS16550_COM4
85 #define PORT serial_ports[port-1]
86 #if defined(CONFIG_CONS_INDEX)
87 #define CONSOLE (serial_ports[CONFIG_CONS_INDEX-1])
90 #if defined(CONFIG_SERIAL_MULTI)
92 /* Multi serial device functions */
93 #define DECLARE_ESERIAL_FUNCTIONS(port) \
94 int eserial##port##_init (void) {\
96 clock_divisor = calc_divisor(serial_ports[port-1]); \
97 NS16550_init(serial_ports[port-1], clock_divisor); \
99 void eserial##port##_setbrg (void) {\
100 serial_setbrg_dev(port);}\
101 int eserial##port##_getc (void) {\
102 return serial_getc_dev(port);}\
103 int eserial##port##_tstc (void) {\
104 return serial_tstc_dev(port);}\
105 void eserial##port##_putc (const char c) {\
106 serial_putc_dev(port, c);}\
107 void eserial##port##_puts (const char *s) {\
108 serial_puts_dev(port, s);}
110 /* Serial device descriptor */
111 #define INIT_ESERIAL_STRUCTURE(port,name,bus) {\
114 eserial##port##_init,\
115 eserial##port##_setbrg,\
116 eserial##port##_getc,\
117 eserial##port##_tstc,\
118 eserial##port##_putc,\
119 eserial##port##_puts, }
121 #endif /* CONFIG_SERIAL_MULTI */
123 static int calc_divisor (NS16550_t port)
125 #ifdef CONFIG_OMAP1510
126 /* If can't cleanly clock 115200 set div to 1 */
127 if ((CONFIG_SYS_NS16550_CLK == 12000000) && (gd->baudrate == 115200)) {
128 port->osc_12m_sel = OSC_12M_SEL; /* enable 6.5 * divisor */
129 return (1); /* return 1 for base divisor */
131 port->osc_12m_sel = 0; /* clear if previsouly set */
133 #ifdef CONFIG_OMAP1610
134 /* If can't cleanly clock 115200 set div to 1 */
135 if ((CONFIG_SYS_NS16550_CLK == 48000000) && (gd->baudrate == 115200)) {
136 return (26); /* return 26 for base divisor */
141 #define MODE_X_DIV 13
143 #define MODE_X_DIV 16
146 /* Compute divisor value. Normally, we should simply return:
147 * CONFIG_SYS_NS16550_CLK) / MODE_X_DIV / gd->baudrate
148 * but we need to round that value by adding 0.5.
149 * Rounding is especially important at high baud rates.
151 return (CONFIG_SYS_NS16550_CLK + (gd->baudrate * (MODE_X_DIV / 2))) /
152 (MODE_X_DIV * gd->baudrate);
155 #if !defined(CONFIG_SERIAL_MULTI)
156 int serial_init (void)
160 #ifdef CONFIG_NS87308
161 initialise_ns87308();
164 #ifdef CONFIG_SYS_NS16550_COM1
165 clock_divisor = calc_divisor(serial_ports[0]);
166 NS16550_init(serial_ports[0], clock_divisor);
168 #ifdef CONFIG_SYS_NS16550_COM2
169 clock_divisor = calc_divisor(serial_ports[1]);
170 NS16550_init(serial_ports[1], clock_divisor);
172 #ifdef CONFIG_SYS_NS16550_COM3
173 clock_divisor = calc_divisor(serial_ports[2]);
174 NS16550_init(serial_ports[2], clock_divisor);
176 #ifdef CONFIG_SYS_NS16550_COM4
177 clock_divisor = calc_divisor(serial_ports[3]);
178 NS16550_init(serial_ports[3], clock_divisor);
186 _serial_putc(const char c,const int port)
189 NS16550_putc(PORT, '\r');
191 NS16550_putc(PORT, c);
195 _serial_putc_raw(const char c,const int port)
197 NS16550_putc(PORT, c);
201 _serial_puts (const char *s,const int port)
204 _serial_putc (*s++,port);
210 _serial_getc(const int port)
212 return NS16550_getc(PORT);
216 _serial_tstc(const int port)
218 return NS16550_tstc(PORT);
222 _serial_setbrg (const int port)
226 clock_divisor = calc_divisor(PORT);
227 NS16550_reinit(PORT, clock_divisor);
230 #if defined(CONFIG_SERIAL_MULTI)
232 serial_putc_dev(unsigned int dev_index,const char c)
234 _serial_putc(c,dev_index);
238 serial_putc(const char c)
240 _serial_putc(c,CONFIG_CONS_INDEX);
244 #if defined(CONFIG_SERIAL_MULTI)
246 serial_putc_raw_dev(unsigned int dev_index,const char c)
248 _serial_putc_raw(c,dev_index);
252 serial_putc_raw(const char c)
254 _serial_putc_raw(c,CONFIG_CONS_INDEX);
258 #if defined(CONFIG_SERIAL_MULTI)
260 serial_puts_dev(unsigned int dev_index,const char *s)
262 _serial_puts(s,dev_index);
266 serial_puts(const char *s)
268 _serial_puts(s,CONFIG_CONS_INDEX);
272 #if defined(CONFIG_SERIAL_MULTI)
274 serial_getc_dev(unsigned int dev_index)
276 return _serial_getc(dev_index);
282 return _serial_getc(CONFIG_CONS_INDEX);
286 #if defined(CONFIG_SERIAL_MULTI)
288 serial_tstc_dev(unsigned int dev_index)
290 return _serial_tstc(dev_index);
296 return _serial_tstc(CONFIG_CONS_INDEX);
300 #if defined(CONFIG_SERIAL_MULTI)
302 serial_setbrg_dev(unsigned int dev_index)
304 _serial_setbrg(dev_index);
310 _serial_setbrg(CONFIG_CONS_INDEX);
314 #if defined(CONFIG_SERIAL_MULTI)
316 DECLARE_ESERIAL_FUNCTIONS(1);
317 struct serial_device eserial1_device =
318 INIT_ESERIAL_STRUCTURE(1,"eserial0","EUART1");
319 DECLARE_ESERIAL_FUNCTIONS(2);
320 struct serial_device eserial2_device =
321 INIT_ESERIAL_STRUCTURE(2,"eserial1","EUART2");
322 DECLARE_ESERIAL_FUNCTIONS(3);
323 struct serial_device eserial3_device =
324 INIT_ESERIAL_STRUCTURE(3,"eserial2","EUART3");
325 DECLARE_ESERIAL_FUNCTIONS(4);
326 struct serial_device eserial4_device =
327 INIT_ESERIAL_STRUCTURE(4,"eserial3","EUART4");
328 #endif /* CONFIG_SERIAL_MULTI */