3 * Rob Taylor, Flying Pig Systems. robt@flyingpig.com.
5 * SPDX-License-Identifier: GPL-2.0+
9 #include <linux/compiler.h>
18 #ifndef CONFIG_NS16550_MIN_FUNCTIONS
20 DECLARE_GLOBAL_DATA_PTR;
22 #if !defined(CONFIG_CONS_INDEX)
23 #elif (CONFIG_CONS_INDEX < 1) || (CONFIG_CONS_INDEX > 6)
24 #error "Invalid console index value."
27 #if CONFIG_CONS_INDEX == 1 && !defined(CONFIG_SYS_NS16550_COM1)
28 #error "Console port 1 defined but not configured."
29 #elif CONFIG_CONS_INDEX == 2 && !defined(CONFIG_SYS_NS16550_COM2)
30 #error "Console port 2 defined but not configured."
31 #elif CONFIG_CONS_INDEX == 3 && !defined(CONFIG_SYS_NS16550_COM3)
32 #error "Console port 3 defined but not configured."
33 #elif CONFIG_CONS_INDEX == 4 && !defined(CONFIG_SYS_NS16550_COM4)
34 #error "Console port 4 defined but not configured."
35 #elif CONFIG_CONS_INDEX == 5 && !defined(CONFIG_SYS_NS16550_COM5)
36 #error "Console port 5 defined but not configured."
37 #elif CONFIG_CONS_INDEX == 6 && !defined(CONFIG_SYS_NS16550_COM6)
38 #error "Console port 6 defined but not configured."
41 /* Note: The port number specified in the functions is 1 based.
42 * the array is 0 based.
44 static NS16550_t serial_ports[6] = {
45 #ifdef CONFIG_SYS_NS16550_COM1
46 (NS16550_t)CONFIG_SYS_NS16550_COM1,
50 #ifdef CONFIG_SYS_NS16550_COM2
51 (NS16550_t)CONFIG_SYS_NS16550_COM2,
55 #ifdef CONFIG_SYS_NS16550_COM3
56 (NS16550_t)CONFIG_SYS_NS16550_COM3,
60 #ifdef CONFIG_SYS_NS16550_COM4
61 (NS16550_t)CONFIG_SYS_NS16550_COM4,
65 #ifdef CONFIG_SYS_NS16550_COM5
66 (NS16550_t)CONFIG_SYS_NS16550_COM5,
70 #ifdef CONFIG_SYS_NS16550_COM6
71 (NS16550_t)CONFIG_SYS_NS16550_COM6
77 #define PORT serial_ports[port-1]
79 /* Multi serial device functions */
80 #define DECLARE_ESERIAL_FUNCTIONS(port) \
81 static int eserial##port##_init(void) \
84 clock_divisor = ns16550_calc_divisor(serial_ports[port-1], \
85 CONFIG_SYS_NS16550_CLK, gd->baudrate); \
86 NS16550_init(serial_ports[port-1], clock_divisor); \
89 static void eserial##port##_setbrg(void) \
91 serial_setbrg_dev(port); \
93 static int eserial##port##_getc(void) \
95 return serial_getc_dev(port); \
97 static int eserial##port##_tstc(void) \
99 return serial_tstc_dev(port); \
101 static void eserial##port##_putc(const char c) \
103 serial_putc_dev(port, c); \
105 static void eserial##port##_puts(const char *s) \
107 serial_puts_dev(port, s); \
110 /* Serial device descriptor */
111 #define INIT_ESERIAL_STRUCTURE(port, __name) { \
113 .start = eserial##port##_init, \
115 .setbrg = eserial##port##_setbrg, \
116 .getc = eserial##port##_getc, \
117 .tstc = eserial##port##_tstc, \
118 .putc = eserial##port##_putc, \
119 .puts = eserial##port##_puts, \
122 static void _serial_putc(const char c, const int port)
125 NS16550_putc(PORT, '\r');
127 NS16550_putc(PORT, c);
130 static void _serial_putc_raw(const char c, const int port)
132 NS16550_putc(PORT, c);
135 static void _serial_puts(const char *s, const int port)
138 _serial_putc(*s++, port);
142 static int _serial_getc(const int port)
144 return NS16550_getc(PORT);
147 static int _serial_tstc(const int port)
149 return NS16550_tstc(PORT);
152 static void _serial_setbrg(const int port)
156 clock_divisor = ns16550_calc_divisor(PORT, CONFIG_SYS_NS16550_CLK,
158 NS16550_reinit(PORT, clock_divisor);
162 serial_putc_dev(unsigned int dev_index,const char c)
164 _serial_putc(c,dev_index);
168 serial_putc_raw_dev(unsigned int dev_index,const char c)
170 _serial_putc_raw(c,dev_index);
174 serial_puts_dev(unsigned int dev_index,const char *s)
176 _serial_puts(s,dev_index);
180 serial_getc_dev(unsigned int dev_index)
182 return _serial_getc(dev_index);
186 serial_tstc_dev(unsigned int dev_index)
188 return _serial_tstc(dev_index);
192 serial_setbrg_dev(unsigned int dev_index)
194 _serial_setbrg(dev_index);
197 #if defined(CONFIG_SYS_NS16550_COM1)
198 DECLARE_ESERIAL_FUNCTIONS(1);
199 struct serial_device eserial1_device =
200 INIT_ESERIAL_STRUCTURE(1, "eserial0");
202 #if defined(CONFIG_SYS_NS16550_COM2)
203 DECLARE_ESERIAL_FUNCTIONS(2);
204 struct serial_device eserial2_device =
205 INIT_ESERIAL_STRUCTURE(2, "eserial1");
207 #if defined(CONFIG_SYS_NS16550_COM3)
208 DECLARE_ESERIAL_FUNCTIONS(3);
209 struct serial_device eserial3_device =
210 INIT_ESERIAL_STRUCTURE(3, "eserial2");
212 #if defined(CONFIG_SYS_NS16550_COM4)
213 DECLARE_ESERIAL_FUNCTIONS(4);
214 struct serial_device eserial4_device =
215 INIT_ESERIAL_STRUCTURE(4, "eserial3");
217 #if defined(CONFIG_SYS_NS16550_COM5)
218 DECLARE_ESERIAL_FUNCTIONS(5);
219 struct serial_device eserial5_device =
220 INIT_ESERIAL_STRUCTURE(5, "eserial4");
222 #if defined(CONFIG_SYS_NS16550_COM6)
223 DECLARE_ESERIAL_FUNCTIONS(6);
224 struct serial_device eserial6_device =
225 INIT_ESERIAL_STRUCTURE(6, "eserial5");
228 __weak struct serial_device *default_serial_console(void)
230 #if CONFIG_CONS_INDEX == 1
231 return &eserial1_device;
232 #elif CONFIG_CONS_INDEX == 2
233 return &eserial2_device;
234 #elif CONFIG_CONS_INDEX == 3
235 return &eserial3_device;
236 #elif CONFIG_CONS_INDEX == 4
237 return &eserial4_device;
238 #elif CONFIG_CONS_INDEX == 5
239 return &eserial5_device;
240 #elif CONFIG_CONS_INDEX == 6
241 return &eserial6_device;
243 #error "Bad CONFIG_CONS_INDEX."
247 void ns16550_serial_initialize(void)
249 #if defined(CONFIG_SYS_NS16550_COM1)
250 serial_register(&eserial1_device);
252 #if defined(CONFIG_SYS_NS16550_COM2)
253 serial_register(&eserial2_device);
255 #if defined(CONFIG_SYS_NS16550_COM3)
256 serial_register(&eserial3_device);
258 #if defined(CONFIG_SYS_NS16550_COM4)
259 serial_register(&eserial4_device);
261 #if defined(CONFIG_SYS_NS16550_COM5)
262 serial_register(&eserial5_device);
264 #if defined(CONFIG_SYS_NS16550_COM6)
265 serial_register(&eserial6_device);
269 #endif /* !CONFIG_NS16550_MIN_FUNCTIONS */