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>
31 #ifdef CONFIG_KIRKWOOD
32 #include <asm/arch/kirkwood.h>
33 #elif defined(CONFIG_ORION5X)
34 #include <asm/arch/orion5x.h>
35 #elif defined(CONFIG_ARMADA100)
36 #include <asm/arch/armada100.h>
37 #elif defined(CONFIG_PANTHEON)
38 #include <asm/arch/pantheon.h>
41 #if defined (CONFIG_SERIAL_MULTI)
45 DECLARE_GLOBAL_DATA_PTR;
47 #if !defined(CONFIG_CONS_INDEX)
48 #if defined (CONFIG_SERIAL_MULTI)
49 /* with CONFIG_SERIAL_MULTI we might have no console
53 #error "No console index specified."
54 #endif /* CONFIG_SERIAL_MULTI */
55 #elif (CONFIG_CONS_INDEX < 1) || (CONFIG_CONS_INDEX > 4)
56 #error "Invalid console index value."
59 #if CONFIG_CONS_INDEX == 1 && !defined(CONFIG_SYS_NS16550_COM1)
60 #error "Console port 1 defined but not configured."
61 #elif CONFIG_CONS_INDEX == 2 && !defined(CONFIG_SYS_NS16550_COM2)
62 #error "Console port 2 defined but not configured."
63 #elif CONFIG_CONS_INDEX == 3 && !defined(CONFIG_SYS_NS16550_COM3)
64 #error "Console port 3 defined but not configured."
65 #elif CONFIG_CONS_INDEX == 4 && !defined(CONFIG_SYS_NS16550_COM4)
66 #error "Console port 4 defined but not configured."
69 /* Note: The port number specified in the functions is 1 based.
70 * the array is 0 based.
72 static NS16550_t serial_ports[4] = {
73 #ifdef CONFIG_SYS_NS16550_COM1
74 (NS16550_t)CONFIG_SYS_NS16550_COM1,
78 #ifdef CONFIG_SYS_NS16550_COM2
79 (NS16550_t)CONFIG_SYS_NS16550_COM2,
83 #ifdef CONFIG_SYS_NS16550_COM3
84 (NS16550_t)CONFIG_SYS_NS16550_COM3,
88 #ifdef CONFIG_SYS_NS16550_COM4
89 (NS16550_t)CONFIG_SYS_NS16550_COM4
95 #define PORT serial_ports[port-1]
96 #if defined(CONFIG_CONS_INDEX)
97 #define CONSOLE (serial_ports[CONFIG_CONS_INDEX-1])
100 #if defined(CONFIG_SERIAL_MULTI)
102 /* Multi serial device functions */
103 #define DECLARE_ESERIAL_FUNCTIONS(port) \
104 int eserial##port##_init (void) {\
106 clock_divisor = calc_divisor(serial_ports[port-1]); \
107 NS16550_init(serial_ports[port-1], clock_divisor); \
109 void eserial##port##_setbrg (void) {\
110 serial_setbrg_dev(port);}\
111 int eserial##port##_getc (void) {\
112 return serial_getc_dev(port);}\
113 int eserial##port##_tstc (void) {\
114 return serial_tstc_dev(port);}\
115 void eserial##port##_putc (const char c) {\
116 serial_putc_dev(port, c);}\
117 void eserial##port##_puts (const char *s) {\
118 serial_puts_dev(port, s);}
120 /* Serial device descriptor */
121 #define INIT_ESERIAL_STRUCTURE(port, name) {\
123 eserial##port##_init,\
125 eserial##port##_setbrg,\
126 eserial##port##_getc,\
127 eserial##port##_tstc,\
128 eserial##port##_putc,\
129 eserial##port##_puts, }
131 #endif /* CONFIG_SERIAL_MULTI */
133 static int calc_divisor (NS16550_t port)
135 #ifdef CONFIG_OMAP1510
136 /* If can't cleanly clock 115200 set div to 1 */
137 if ((CONFIG_SYS_NS16550_CLK == 12000000) && (gd->baudrate == 115200)) {
138 port->osc_12m_sel = OSC_12M_SEL; /* enable 6.5 * divisor */
139 return (1); /* return 1 for base divisor */
141 port->osc_12m_sel = 0; /* clear if previsouly set */
143 #ifdef CONFIG_OMAP1610
144 /* If can't cleanly clock 115200 set div to 1 */
145 if ((CONFIG_SYS_NS16550_CLK == 48000000) && (gd->baudrate == 115200)) {
146 return (26); /* return 26 for base divisor */
151 #define MODE_X_DIV 13
153 #define MODE_X_DIV 16
156 /* Compute divisor value. Normally, we should simply return:
157 * CONFIG_SYS_NS16550_CLK) / MODE_X_DIV / gd->baudrate
158 * but we need to round that value by adding 0.5.
159 * Rounding is especially important at high baud rates.
161 return (CONFIG_SYS_NS16550_CLK + (gd->baudrate * (MODE_X_DIV / 2))) /
162 (MODE_X_DIV * gd->baudrate);
165 #if !defined(CONFIG_SERIAL_MULTI)
166 int serial_init (void)
170 #ifdef CONFIG_NS87308
171 initialise_ns87308();
174 #ifdef CONFIG_SYS_NS16550_COM1
175 clock_divisor = calc_divisor(serial_ports[0]);
176 NS16550_init(serial_ports[0], clock_divisor);
178 #ifdef CONFIG_SYS_NS16550_COM2
179 clock_divisor = calc_divisor(serial_ports[1]);
180 NS16550_init(serial_ports[1], clock_divisor);
182 #ifdef CONFIG_SYS_NS16550_COM3
183 clock_divisor = calc_divisor(serial_ports[2]);
184 NS16550_init(serial_ports[2], clock_divisor);
186 #ifdef CONFIG_SYS_NS16550_COM4
187 clock_divisor = calc_divisor(serial_ports[3]);
188 NS16550_init(serial_ports[3], clock_divisor);
196 _serial_putc(const char c,const int port)
199 NS16550_putc(PORT, '\r');
201 NS16550_putc(PORT, c);
205 _serial_putc_raw(const char c,const int port)
207 NS16550_putc(PORT, c);
211 _serial_puts (const char *s,const int port)
214 _serial_putc (*s++,port);
220 _serial_getc(const int port)
222 return NS16550_getc(PORT);
226 _serial_tstc(const int port)
228 return NS16550_tstc(PORT);
232 _serial_setbrg (const int port)
236 clock_divisor = calc_divisor(PORT);
237 NS16550_reinit(PORT, clock_divisor);
240 #if defined(CONFIG_SERIAL_MULTI)
242 serial_putc_dev(unsigned int dev_index,const char c)
244 _serial_putc(c,dev_index);
248 serial_putc(const char c)
250 _serial_putc(c,CONFIG_CONS_INDEX);
254 #if defined(CONFIG_SERIAL_MULTI)
256 serial_putc_raw_dev(unsigned int dev_index,const char c)
258 _serial_putc_raw(c,dev_index);
262 serial_putc_raw(const char c)
264 _serial_putc_raw(c,CONFIG_CONS_INDEX);
268 #if defined(CONFIG_SERIAL_MULTI)
270 serial_puts_dev(unsigned int dev_index,const char *s)
272 _serial_puts(s,dev_index);
276 serial_puts(const char *s)
278 _serial_puts(s,CONFIG_CONS_INDEX);
282 #if defined(CONFIG_SERIAL_MULTI)
284 serial_getc_dev(unsigned int dev_index)
286 return _serial_getc(dev_index);
292 return _serial_getc(CONFIG_CONS_INDEX);
296 #if defined(CONFIG_SERIAL_MULTI)
298 serial_tstc_dev(unsigned int dev_index)
300 return _serial_tstc(dev_index);
306 return _serial_tstc(CONFIG_CONS_INDEX);
310 #if defined(CONFIG_SERIAL_MULTI)
312 serial_setbrg_dev(unsigned int dev_index)
314 _serial_setbrg(dev_index);
320 _serial_setbrg(CONFIG_CONS_INDEX);
324 #if defined(CONFIG_SERIAL_MULTI)
326 DECLARE_ESERIAL_FUNCTIONS(1);
327 struct serial_device eserial1_device =
328 INIT_ESERIAL_STRUCTURE(1, "eserial0");
329 DECLARE_ESERIAL_FUNCTIONS(2);
330 struct serial_device eserial2_device =
331 INIT_ESERIAL_STRUCTURE(2, "eserial1");
332 DECLARE_ESERIAL_FUNCTIONS(3);
333 struct serial_device eserial3_device =
334 INIT_ESERIAL_STRUCTURE(3, "eserial2");
335 DECLARE_ESERIAL_FUNCTIONS(4);
336 struct serial_device eserial4_device =
337 INIT_ESERIAL_STRUCTURE(4, "eserial3");
339 __weak struct serial_device *default_serial_console(void)
341 #if CONFIG_CONS_INDEX == 1
342 return &eserial1_device;
343 #elif CONFIG_CONS_INDEX == 2
344 return &eserial2_device;
345 #elif CONFIG_CONS_INDEX == 3
346 return &eserial3_device;
347 #elif CONFIG_CONS_INDEX == 4
348 return &eserial4_device;
350 #error "Bad CONFIG_CONS_INDEX."
354 #endif /* CONFIG_SERIAL_MULTI */