1 // SPDX-License-Identifier: GPL-2.0+
4 * Rob Taylor, Flying Pig Systems. robt@flyingpig.com.
8 #include <clock_legacy.h>
11 #include <linux/compiler.h>
13 #ifndef CONFIG_NS16550_MIN_FUNCTIONS
15 DECLARE_GLOBAL_DATA_PTR;
17 #if !defined(CONFIG_CONS_INDEX)
18 #elif (CONFIG_CONS_INDEX < 1) || (CONFIG_CONS_INDEX > 6)
19 #error "Invalid console index value."
22 #if CONFIG_CONS_INDEX == 1 && !defined(CONFIG_SYS_NS16550_COM1)
23 #error "Console port 1 defined but not configured."
24 #elif CONFIG_CONS_INDEX == 2 && !defined(CONFIG_SYS_NS16550_COM2)
25 #error "Console port 2 defined but not configured."
26 #elif CONFIG_CONS_INDEX == 3 && !defined(CONFIG_SYS_NS16550_COM3)
27 #error "Console port 3 defined but not configured."
28 #elif CONFIG_CONS_INDEX == 4 && !defined(CONFIG_SYS_NS16550_COM4)
29 #error "Console port 4 defined but not configured."
30 #elif CONFIG_CONS_INDEX == 5 && !defined(CONFIG_SYS_NS16550_COM5)
31 #error "Console port 5 defined but not configured."
32 #elif CONFIG_CONS_INDEX == 6 && !defined(CONFIG_SYS_NS16550_COM6)
33 #error "Console port 6 defined but not configured."
36 /* Note: The port number specified in the functions is 1 based.
37 * the array is 0 based.
39 static NS16550_t serial_ports[6] = {
40 #ifdef CONFIG_SYS_NS16550_COM1
41 (NS16550_t)CONFIG_SYS_NS16550_COM1,
45 #ifdef CONFIG_SYS_NS16550_COM2
46 (NS16550_t)CONFIG_SYS_NS16550_COM2,
50 #ifdef CONFIG_SYS_NS16550_COM3
51 (NS16550_t)CONFIG_SYS_NS16550_COM3,
55 #ifdef CONFIG_SYS_NS16550_COM4
56 (NS16550_t)CONFIG_SYS_NS16550_COM4,
60 #ifdef CONFIG_SYS_NS16550_COM5
61 (NS16550_t)CONFIG_SYS_NS16550_COM5,
65 #ifdef CONFIG_SYS_NS16550_COM6
66 (NS16550_t)CONFIG_SYS_NS16550_COM6
72 #define PORT serial_ports[port-1]
74 /* Multi serial device functions */
75 #define DECLARE_ESERIAL_FUNCTIONS(port) \
76 static int eserial##port##_init(void) \
79 clock_divisor = ns16550_calc_divisor(serial_ports[port-1], \
80 CONFIG_SYS_NS16550_CLK, gd->baudrate); \
81 NS16550_init(serial_ports[port-1], clock_divisor); \
84 static void eserial##port##_setbrg(void) \
86 serial_setbrg_dev(port); \
88 static int eserial##port##_getc(void) \
90 return serial_getc_dev(port); \
92 static int eserial##port##_tstc(void) \
94 return serial_tstc_dev(port); \
96 static void eserial##port##_putc(const char c) \
98 serial_putc_dev(port, c); \
100 static void eserial##port##_puts(const char *s) \
102 serial_puts_dev(port, s); \
105 /* Serial device descriptor */
106 #define INIT_ESERIAL_STRUCTURE(port, __name) { \
108 .start = eserial##port##_init, \
110 .setbrg = eserial##port##_setbrg, \
111 .getc = eserial##port##_getc, \
112 .tstc = eserial##port##_tstc, \
113 .putc = eserial##port##_putc, \
114 .puts = eserial##port##_puts, \
117 static void _serial_putc(const char c, const int port)
120 NS16550_putc(PORT, '\r');
122 NS16550_putc(PORT, c);
125 static void _serial_puts(const char *s, const int port)
128 _serial_putc(*s++, port);
132 static int _serial_getc(const int port)
134 return NS16550_getc(PORT);
137 static int _serial_tstc(const int port)
139 return NS16550_tstc(PORT);
142 static void _serial_setbrg(const int port)
146 clock_divisor = ns16550_calc_divisor(PORT, CONFIG_SYS_NS16550_CLK,
148 NS16550_reinit(PORT, clock_divisor);
152 serial_putc_dev(unsigned int dev_index,const char c)
154 _serial_putc(c,dev_index);
158 serial_puts_dev(unsigned int dev_index,const char *s)
160 _serial_puts(s,dev_index);
164 serial_getc_dev(unsigned int dev_index)
166 return _serial_getc(dev_index);
170 serial_tstc_dev(unsigned int dev_index)
172 return _serial_tstc(dev_index);
176 serial_setbrg_dev(unsigned int dev_index)
178 _serial_setbrg(dev_index);
181 #if defined(CONFIG_SYS_NS16550_COM1)
182 DECLARE_ESERIAL_FUNCTIONS(1);
183 struct serial_device eserial1_device =
184 INIT_ESERIAL_STRUCTURE(1, "eserial0");
186 #if defined(CONFIG_SYS_NS16550_COM2)
187 DECLARE_ESERIAL_FUNCTIONS(2);
188 struct serial_device eserial2_device =
189 INIT_ESERIAL_STRUCTURE(2, "eserial1");
191 #if defined(CONFIG_SYS_NS16550_COM3)
192 DECLARE_ESERIAL_FUNCTIONS(3);
193 struct serial_device eserial3_device =
194 INIT_ESERIAL_STRUCTURE(3, "eserial2");
196 #if defined(CONFIG_SYS_NS16550_COM4)
197 DECLARE_ESERIAL_FUNCTIONS(4);
198 struct serial_device eserial4_device =
199 INIT_ESERIAL_STRUCTURE(4, "eserial3");
201 #if defined(CONFIG_SYS_NS16550_COM5)
202 DECLARE_ESERIAL_FUNCTIONS(5);
203 struct serial_device eserial5_device =
204 INIT_ESERIAL_STRUCTURE(5, "eserial4");
206 #if defined(CONFIG_SYS_NS16550_COM6)
207 DECLARE_ESERIAL_FUNCTIONS(6);
208 struct serial_device eserial6_device =
209 INIT_ESERIAL_STRUCTURE(6, "eserial5");
212 __weak struct serial_device *default_serial_console(void)
214 #if CONFIG_CONS_INDEX == 1
215 return &eserial1_device;
216 #elif CONFIG_CONS_INDEX == 2
217 return &eserial2_device;
218 #elif CONFIG_CONS_INDEX == 3
219 return &eserial3_device;
220 #elif CONFIG_CONS_INDEX == 4
221 return &eserial4_device;
222 #elif CONFIG_CONS_INDEX == 5
223 return &eserial5_device;
224 #elif CONFIG_CONS_INDEX == 6
225 return &eserial6_device;
227 #error "Bad CONFIG_CONS_INDEX."
231 void ns16550_serial_initialize(void)
233 #if defined(CONFIG_SYS_NS16550_COM1)
234 serial_register(&eserial1_device);
236 #if defined(CONFIG_SYS_NS16550_COM2)
237 serial_register(&eserial2_device);
239 #if defined(CONFIG_SYS_NS16550_COM3)
240 serial_register(&eserial3_device);
242 #if defined(CONFIG_SYS_NS16550_COM4)
243 serial_register(&eserial4_device);
245 #if defined(CONFIG_SYS_NS16550_COM5)
246 serial_register(&eserial5_device);
248 #if defined(CONFIG_SYS_NS16550_COM6)
249 serial_register(&eserial6_device);
253 #endif /* !CONFIG_NS16550_MIN_FUNCTIONS */