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[u-boot.git] / drivers / serial / serial_ns16550.c
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83d290c5 1// SPDX-License-Identifier: GPL-2.0+
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2/*
3 * (C) Copyright 2000
4 * Rob Taylor, Flying Pig Systems. robt@flyingpig.com.
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5 */
6
7#include <common.h>
6c768ca7 8#include <linux/compiler.h>
78f6622a 9
78f6622a 10#include <ns16550.h>
55d6d2d3 11#ifdef CONFIG_NS87308
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12#include <ns87308.h>
13#endif
14
0fd30252 15#include <serial.h>
0fd30252 16
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17#ifndef CONFIG_NS16550_MIN_FUNCTIONS
18
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19DECLARE_GLOBAL_DATA_PTR;
20
756f586a 21#if !defined(CONFIG_CONS_INDEX)
96708a06 22#elif (CONFIG_CONS_INDEX < 1) || (CONFIG_CONS_INDEX > 6)
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23#error "Invalid console index value."
24#endif
25
6d0f6bcf 26#if CONFIG_CONS_INDEX == 1 && !defined(CONFIG_SYS_NS16550_COM1)
756f586a 27#error "Console port 1 defined but not configured."
6d0f6bcf 28#elif CONFIG_CONS_INDEX == 2 && !defined(CONFIG_SYS_NS16550_COM2)
756f586a 29#error "Console port 2 defined but not configured."
6d0f6bcf 30#elif CONFIG_CONS_INDEX == 3 && !defined(CONFIG_SYS_NS16550_COM3)
756f586a 31#error "Console port 3 defined but not configured."
6d0f6bcf 32#elif CONFIG_CONS_INDEX == 4 && !defined(CONFIG_SYS_NS16550_COM4)
756f586a 33#error "Console port 4 defined but not configured."
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34#elif CONFIG_CONS_INDEX == 5 && !defined(CONFIG_SYS_NS16550_COM5)
35#error "Console port 5 defined but not configured."
36#elif CONFIG_CONS_INDEX == 6 && !defined(CONFIG_SYS_NS16550_COM6)
37#error "Console port 6 defined but not configured."
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38#endif
39
40/* Note: The port number specified in the functions is 1 based.
41 * the array is 0 based.
42 */
96708a06 43static NS16550_t serial_ports[6] = {
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44#ifdef CONFIG_SYS_NS16550_COM1
45 (NS16550_t)CONFIG_SYS_NS16550_COM1,
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46#else
47 NULL,
48#endif
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49#ifdef CONFIG_SYS_NS16550_COM2
50 (NS16550_t)CONFIG_SYS_NS16550_COM2,
78f6622a 51#else
756f586a 52 NULL,
78f6622a 53#endif
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54#ifdef CONFIG_SYS_NS16550_COM3
55 (NS16550_t)CONFIG_SYS_NS16550_COM3,
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56#else
57 NULL,
58#endif
6d0f6bcf 59#ifdef CONFIG_SYS_NS16550_COM4
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60 (NS16550_t)CONFIG_SYS_NS16550_COM4,
61#else
62 NULL,
63#endif
64#ifdef CONFIG_SYS_NS16550_COM5
65 (NS16550_t)CONFIG_SYS_NS16550_COM5,
66#else
67 NULL,
68#endif
69#ifdef CONFIG_SYS_NS16550_COM6
70 (NS16550_t)CONFIG_SYS_NS16550_COM6
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71#else
72 NULL
73#endif
74};
75
76#define PORT serial_ports[port-1]
0fd30252 77
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78/* Multi serial device functions */
79#define DECLARE_ESERIAL_FUNCTIONS(port) \
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80 static int eserial##port##_init(void) \
81 { \
82 int clock_divisor; \
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83 clock_divisor = ns16550_calc_divisor(serial_ports[port-1], \
84 CONFIG_SYS_NS16550_CLK, gd->baudrate); \
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85 NS16550_init(serial_ports[port-1], clock_divisor); \
86 return 0 ; \
87 } \
88 static void eserial##port##_setbrg(void) \
89 { \
90 serial_setbrg_dev(port); \
91 } \
92 static int eserial##port##_getc(void) \
93 { \
94 return serial_getc_dev(port); \
95 } \
96 static int eserial##port##_tstc(void) \
97 { \
98 return serial_tstc_dev(port); \
99 } \
100 static void eserial##port##_putc(const char c) \
101 { \
102 serial_putc_dev(port, c); \
103 } \
104 static void eserial##port##_puts(const char *s) \
105 { \
106 serial_puts_dev(port, s); \
107 }
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108
109/* Serial device descriptor */
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110#define INIT_ESERIAL_STRUCTURE(port, __name) { \
111 .name = __name, \
112 .start = eserial##port##_init, \
113 .stop = NULL, \
114 .setbrg = eserial##port##_setbrg, \
115 .getc = eserial##port##_getc, \
116 .tstc = eserial##port##_tstc, \
117 .putc = eserial##port##_putc, \
118 .puts = eserial##port##_puts, \
119}
0fd30252 120
3fdd0bb2 121static void _serial_putc(const char c, const int port)
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122{
123 if (c == '\n')
756f586a 124 NS16550_putc(PORT, '\r');
78f6622a 125
756f586a 126 NS16550_putc(PORT, c);
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127}
128
3fdd0bb2 129static void _serial_puts(const char *s, const int port)
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130{
131 while (*s) {
3fdd0bb2 132 _serial_putc(*s++, port);
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133 }
134}
135
3fdd0bb2 136static int _serial_getc(const int port)
78f6622a 137{
756f586a 138 return NS16550_getc(PORT);
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139}
140
3fdd0bb2 141static int _serial_tstc(const int port)
78f6622a 142{
756f586a 143 return NS16550_tstc(PORT);
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144}
145
3fdd0bb2 146static void _serial_setbrg(const int port)
78f6622a 147{
2e5983d2 148 int clock_divisor;
78f6622a 149
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150 clock_divisor = ns16550_calc_divisor(PORT, CONFIG_SYS_NS16550_CLK,
151 gd->baudrate);
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152 NS16550_reinit(PORT, clock_divisor);
153}
154
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155static inline void
156serial_putc_dev(unsigned int dev_index,const char c)
157{
158 _serial_putc(c,dev_index);
159}
756f586a 160
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161static inline void
162serial_puts_dev(unsigned int dev_index,const char *s)
163{
164 _serial_puts(s,dev_index);
165}
756f586a 166
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167static inline int
168serial_getc_dev(unsigned int dev_index)
169{
170 return _serial_getc(dev_index);
171}
756f586a 172
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173static inline int
174serial_tstc_dev(unsigned int dev_index)
175{
176 return _serial_tstc(dev_index);
177}
756f586a 178
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179static inline void
180serial_setbrg_dev(unsigned int dev_index)
181{
182 _serial_setbrg(dev_index);
183}
0fd30252 184
55db9cca 185#if defined(CONFIG_SYS_NS16550_COM1)
0fd30252 186DECLARE_ESERIAL_FUNCTIONS(1);
511d0c72 187struct serial_device eserial1_device =
1c9a5606 188 INIT_ESERIAL_STRUCTURE(1, "eserial0");
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189#endif
190#if defined(CONFIG_SYS_NS16550_COM2)
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191DECLARE_ESERIAL_FUNCTIONS(2);
192struct serial_device eserial2_device =
1c9a5606 193 INIT_ESERIAL_STRUCTURE(2, "eserial1");
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194#endif
195#if defined(CONFIG_SYS_NS16550_COM3)
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196DECLARE_ESERIAL_FUNCTIONS(3);
197struct serial_device eserial3_device =
1c9a5606 198 INIT_ESERIAL_STRUCTURE(3, "eserial2");
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199#endif
200#if defined(CONFIG_SYS_NS16550_COM4)
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201DECLARE_ESERIAL_FUNCTIONS(4);
202struct serial_device eserial4_device =
1c9a5606 203 INIT_ESERIAL_STRUCTURE(4, "eserial3");
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204#endif
205#if defined(CONFIG_SYS_NS16550_COM5)
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206DECLARE_ESERIAL_FUNCTIONS(5);
207struct serial_device eserial5_device =
208 INIT_ESERIAL_STRUCTURE(5, "eserial4");
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209#endif
210#if defined(CONFIG_SYS_NS16550_COM6)
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211DECLARE_ESERIAL_FUNCTIONS(6);
212struct serial_device eserial6_device =
213 INIT_ESERIAL_STRUCTURE(6, "eserial5");
55db9cca 214#endif
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215
216__weak struct serial_device *default_serial_console(void)
217{
218#if CONFIG_CONS_INDEX == 1
219 return &eserial1_device;
220#elif CONFIG_CONS_INDEX == 2
221 return &eserial2_device;
222#elif CONFIG_CONS_INDEX == 3
223 return &eserial3_device;
224#elif CONFIG_CONS_INDEX == 4
225 return &eserial4_device;
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226#elif CONFIG_CONS_INDEX == 5
227 return &eserial5_device;
228#elif CONFIG_CONS_INDEX == 6
229 return &eserial6_device;
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230#else
231#error "Bad CONFIG_CONS_INDEX."
232#endif
233}
234
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235void ns16550_serial_initialize(void)
236{
237#if defined(CONFIG_SYS_NS16550_COM1)
238 serial_register(&eserial1_device);
239#endif
240#if defined(CONFIG_SYS_NS16550_COM2)
241 serial_register(&eserial2_device);
242#endif
243#if defined(CONFIG_SYS_NS16550_COM3)
244 serial_register(&eserial3_device);
245#endif
246#if defined(CONFIG_SYS_NS16550_COM4)
247 serial_register(&eserial4_device);
248#endif
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249#if defined(CONFIG_SYS_NS16550_COM5)
250 serial_register(&eserial5_device);
251#endif
252#if defined(CONFIG_SYS_NS16550_COM6)
253 serial_register(&eserial6_device);
254#endif
abc0ed8d 255}
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256
257#endif /* !CONFIG_NS16550_MIN_FUNCTIONS */
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