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Tom Rini83d290c2018-05-06 17:58:06 -04001// SPDX-License-Identifier: GPL-2.0+
wdenk78f66222002-08-27 10:27:51 +00002/*
3 * (C) Copyright 2000
4 * Rob Taylor, Flying Pig Systems. robt@flyingpig.com.
wdenk78f66222002-08-27 10:27:51 +00005 */
6
7#include <common.h>
Simon Glassd96c2602019-12-28 10:44:58 -07008#include <clock_legacy.h>
wdenk78f66222002-08-27 10:27:51 +00009#include <ns16550.h>
Wolfgang Denk0fd30252006-08-30 23:02:10 +020010#include <serial.h>
Simon Glass015e3342019-12-28 10:44:47 -070011#include <linux/compiler.h>
Wolfgang Denk0fd30252006-08-30 23:02:10 +020012
Scott Wood48cbc3a2012-10-16 15:43:15 -050013#ifndef CONFIG_NS16550_MIN_FUNCTIONS
14
Wolfgang Denkd87080b2006-03-31 18:32:53 +020015DECLARE_GLOBAL_DATA_PTR;
16
wdenk756f5862005-04-03 15:51:42 +000017#if !defined(CONFIG_CONS_INDEX)
Andrew Bradford96708a02012-10-25 08:21:31 -040018#elif (CONFIG_CONS_INDEX < 1) || (CONFIG_CONS_INDEX > 6)
wdenk756f5862005-04-03 15:51:42 +000019#error "Invalid console index value."
wdenk78f66222002-08-27 10:27:51 +000020#endif
21
Jean-Christophe PLAGNIOL-VILLARD6d0f6bc2008-10-16 15:01:15 +020022#if CONFIG_CONS_INDEX == 1 && !defined(CONFIG_SYS_NS16550_COM1)
wdenk756f5862005-04-03 15:51:42 +000023#error "Console port 1 defined but not configured."
Jean-Christophe PLAGNIOL-VILLARD6d0f6bc2008-10-16 15:01:15 +020024#elif CONFIG_CONS_INDEX == 2 && !defined(CONFIG_SYS_NS16550_COM2)
wdenk756f5862005-04-03 15:51:42 +000025#error "Console port 2 defined but not configured."
Jean-Christophe PLAGNIOL-VILLARD6d0f6bc2008-10-16 15:01:15 +020026#elif CONFIG_CONS_INDEX == 3 && !defined(CONFIG_SYS_NS16550_COM3)
wdenk756f5862005-04-03 15:51:42 +000027#error "Console port 3 defined but not configured."
Jean-Christophe PLAGNIOL-VILLARD6d0f6bc2008-10-16 15:01:15 +020028#elif CONFIG_CONS_INDEX == 4 && !defined(CONFIG_SYS_NS16550_COM4)
wdenk756f5862005-04-03 15:51:42 +000029#error "Console port 4 defined but not configured."
Andrew Bradford96708a02012-10-25 08:21:31 -040030#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."
wdenk756f5862005-04-03 15:51:42 +000034#endif
35
36/* Note: The port number specified in the functions is 1 based.
37 * the array is 0 based.
38 */
Andrew Bradford96708a02012-10-25 08:21:31 -040039static NS16550_t serial_ports[6] = {
Jean-Christophe PLAGNIOL-VILLARD6d0f6bc2008-10-16 15:01:15 +020040#ifdef CONFIG_SYS_NS16550_COM1
41 (NS16550_t)CONFIG_SYS_NS16550_COM1,
wdenk756f5862005-04-03 15:51:42 +000042#else
43 NULL,
44#endif
Jean-Christophe PLAGNIOL-VILLARD6d0f6bc2008-10-16 15:01:15 +020045#ifdef CONFIG_SYS_NS16550_COM2
46 (NS16550_t)CONFIG_SYS_NS16550_COM2,
wdenk756f5862005-04-03 15:51:42 +000047#else
48 NULL,
49#endif
Jean-Christophe PLAGNIOL-VILLARD6d0f6bc2008-10-16 15:01:15 +020050#ifdef CONFIG_SYS_NS16550_COM3
51 (NS16550_t)CONFIG_SYS_NS16550_COM3,
wdenk756f5862005-04-03 15:51:42 +000052#else
53 NULL,
54#endif
Jean-Christophe PLAGNIOL-VILLARD6d0f6bc2008-10-16 15:01:15 +020055#ifdef CONFIG_SYS_NS16550_COM4
Andrew Bradford96708a02012-10-25 08:21:31 -040056 (NS16550_t)CONFIG_SYS_NS16550_COM4,
57#else
58 NULL,
59#endif
60#ifdef CONFIG_SYS_NS16550_COM5
61 (NS16550_t)CONFIG_SYS_NS16550_COM5,
62#else
63 NULL,
64#endif
65#ifdef CONFIG_SYS_NS16550_COM6
66 (NS16550_t)CONFIG_SYS_NS16550_COM6
wdenk756f5862005-04-03 15:51:42 +000067#else
68 NULL
69#endif
70};
71
72#define PORT serial_ports[port-1]
Wolfgang Denk0fd30252006-08-30 23:02:10 +020073
Wolfgang Denk0fd30252006-08-30 23:02:10 +020074/* Multi serial device functions */
75#define DECLARE_ESERIAL_FUNCTIONS(port) \
Kim Phillipsac63f2a2012-10-29 13:34:47 +000076 static int eserial##port##_init(void) \
77 { \
78 int clock_divisor; \
Simon Glassfa54eb12014-09-04 16:27:32 -060079 clock_divisor = ns16550_calc_divisor(serial_ports[port-1], \
80 CONFIG_SYS_NS16550_CLK, gd->baudrate); \
Kim Phillipsac63f2a2012-10-29 13:34:47 +000081 NS16550_init(serial_ports[port-1], clock_divisor); \
82 return 0 ; \
83 } \
84 static void eserial##port##_setbrg(void) \
85 { \
86 serial_setbrg_dev(port); \
87 } \
88 static int eserial##port##_getc(void) \
89 { \
90 return serial_getc_dev(port); \
91 } \
92 static int eserial##port##_tstc(void) \
93 { \
94 return serial_tstc_dev(port); \
95 } \
96 static void eserial##port##_putc(const char c) \
97 { \
98 serial_putc_dev(port, c); \
99 } \
100 static void eserial##port##_puts(const char *s) \
101 { \
102 serial_puts_dev(port, s); \
103 }
Wolfgang Denk0fd30252006-08-30 23:02:10 +0200104
105/* Serial device descriptor */
Marek Vasut90bad892012-09-09 18:48:28 +0200106#define INIT_ESERIAL_STRUCTURE(port, __name) { \
107 .name = __name, \
108 .start = eserial##port##_init, \
109 .stop = NULL, \
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, \
115}
Wolfgang Denk0fd30252006-08-30 23:02:10 +0200116
Masahiro Yamada3fdd0bb2014-10-23 22:26:05 +0900117static void _serial_putc(const char c, const int port)
wdenk78f66222002-08-27 10:27:51 +0000118{
119 if (c == '\n')
wdenk756f5862005-04-03 15:51:42 +0000120 NS16550_putc(PORT, '\r');
wdenk78f66222002-08-27 10:27:51 +0000121
wdenk756f5862005-04-03 15:51:42 +0000122 NS16550_putc(PORT, c);
wdenk78f66222002-08-27 10:27:51 +0000123}
124
Masahiro Yamada3fdd0bb2014-10-23 22:26:05 +0900125static void _serial_puts(const char *s, const int port)
wdenk78f66222002-08-27 10:27:51 +0000126{
127 while (*s) {
Masahiro Yamada3fdd0bb2014-10-23 22:26:05 +0900128 _serial_putc(*s++, port);
wdenk78f66222002-08-27 10:27:51 +0000129 }
130}
131
Masahiro Yamada3fdd0bb2014-10-23 22:26:05 +0900132static int _serial_getc(const int port)
wdenk756f5862005-04-03 15:51:42 +0000133{
134 return NS16550_getc(PORT);
135}
136
Masahiro Yamada3fdd0bb2014-10-23 22:26:05 +0900137static int _serial_tstc(const int port)
wdenk756f5862005-04-03 15:51:42 +0000138{
139 return NS16550_tstc(PORT);
140}
141
Masahiro Yamada3fdd0bb2014-10-23 22:26:05 +0900142static void _serial_setbrg(const int port)
wdenk756f5862005-04-03 15:51:42 +0000143{
144 int clock_divisor;
145
Simon Glassfa54eb12014-09-04 16:27:32 -0600146 clock_divisor = ns16550_calc_divisor(PORT, CONFIG_SYS_NS16550_CLK,
147 gd->baudrate);
wdenk756f5862005-04-03 15:51:42 +0000148 NS16550_reinit(PORT, clock_divisor);
149}
150
Wolfgang Denk0fd30252006-08-30 23:02:10 +0200151static inline void
152serial_putc_dev(unsigned int dev_index,const char c)
153{
154 _serial_putc(c,dev_index);
155}
wdenk756f5862005-04-03 15:51:42 +0000156
Wolfgang Denk511d0c72006-10-09 00:42:01 +0200157static inline void
Wolfgang Denk0fd30252006-08-30 23:02:10 +0200158serial_puts_dev(unsigned int dev_index,const char *s)
159{
160 _serial_puts(s,dev_index);
161}
wdenk756f5862005-04-03 15:51:42 +0000162
Wolfgang Denk0fd30252006-08-30 23:02:10 +0200163static inline int
164serial_getc_dev(unsigned int dev_index)
165{
166 return _serial_getc(dev_index);
167}
wdenk78f66222002-08-27 10:27:51 +0000168
Wolfgang Denk0fd30252006-08-30 23:02:10 +0200169static inline int
170serial_tstc_dev(unsigned int dev_index)
171{
172 return _serial_tstc(dev_index);
173}
wdenk78f66222002-08-27 10:27:51 +0000174
Wolfgang Denk0fd30252006-08-30 23:02:10 +0200175static inline void
176serial_setbrg_dev(unsigned int dev_index)
177{
178 _serial_setbrg(dev_index);
179}
Wolfgang Denk0fd30252006-08-30 23:02:10 +0200180
Scott Wood55db9cc2013-01-18 15:42:16 +0000181#if defined(CONFIG_SYS_NS16550_COM1)
Wolfgang Denk0fd30252006-08-30 23:02:10 +0200182DECLARE_ESERIAL_FUNCTIONS(1);
Wolfgang Denk511d0c72006-10-09 00:42:01 +0200183struct serial_device eserial1_device =
Mike Frysinger1c9a5602011-04-29 18:03:31 +0000184 INIT_ESERIAL_STRUCTURE(1, "eserial0");
Scott Wood55db9cc2013-01-18 15:42:16 +0000185#endif
186#if defined(CONFIG_SYS_NS16550_COM2)
Wolfgang Denk0fd30252006-08-30 23:02:10 +0200187DECLARE_ESERIAL_FUNCTIONS(2);
188struct serial_device eserial2_device =
Mike Frysinger1c9a5602011-04-29 18:03:31 +0000189 INIT_ESERIAL_STRUCTURE(2, "eserial1");
Scott Wood55db9cc2013-01-18 15:42:16 +0000190#endif
191#if defined(CONFIG_SYS_NS16550_COM3)
Wolfgang Denk0fd30252006-08-30 23:02:10 +0200192DECLARE_ESERIAL_FUNCTIONS(3);
193struct serial_device eserial3_device =
Mike Frysinger1c9a5602011-04-29 18:03:31 +0000194 INIT_ESERIAL_STRUCTURE(3, "eserial2");
Scott Wood55db9cc2013-01-18 15:42:16 +0000195#endif
196#if defined(CONFIG_SYS_NS16550_COM4)
Wolfgang Denk0fd30252006-08-30 23:02:10 +0200197DECLARE_ESERIAL_FUNCTIONS(4);
198struct serial_device eserial4_device =
Mike Frysinger1c9a5602011-04-29 18:03:31 +0000199 INIT_ESERIAL_STRUCTURE(4, "eserial3");
Scott Wood55db9cc2013-01-18 15:42:16 +0000200#endif
201#if defined(CONFIG_SYS_NS16550_COM5)
Andrew Bradford96708a02012-10-25 08:21:31 -0400202DECLARE_ESERIAL_FUNCTIONS(5);
203struct serial_device eserial5_device =
204 INIT_ESERIAL_STRUCTURE(5, "eserial4");
Scott Wood55db9cc2013-01-18 15:42:16 +0000205#endif
206#if defined(CONFIG_SYS_NS16550_COM6)
Andrew Bradford96708a02012-10-25 08:21:31 -0400207DECLARE_ESERIAL_FUNCTIONS(6);
208struct serial_device eserial6_device =
209 INIT_ESERIAL_STRUCTURE(6, "eserial5");
Scott Wood55db9cc2013-01-18 15:42:16 +0000210#endif
Mike Frysinger6c768ca2011-04-29 18:03:29 +0000211
212__weak struct serial_device *default_serial_console(void)
213{
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;
Andrew Bradford96708a02012-10-25 08:21:31 -0400222#elif CONFIG_CONS_INDEX == 5
223 return &eserial5_device;
224#elif CONFIG_CONS_INDEX == 6
225 return &eserial6_device;
Mike Frysinger6c768ca2011-04-29 18:03:29 +0000226#else
227#error "Bad CONFIG_CONS_INDEX."
228#endif
229}
230
Marek Vasutabc0ed82012-09-12 20:02:05 +0200231void ns16550_serial_initialize(void)
232{
233#if defined(CONFIG_SYS_NS16550_COM1)
234 serial_register(&eserial1_device);
235#endif
236#if defined(CONFIG_SYS_NS16550_COM2)
237 serial_register(&eserial2_device);
238#endif
239#if defined(CONFIG_SYS_NS16550_COM3)
240 serial_register(&eserial3_device);
241#endif
242#if defined(CONFIG_SYS_NS16550_COM4)
243 serial_register(&eserial4_device);
244#endif
Andrew Bradford96708a02012-10-25 08:21:31 -0400245#if defined(CONFIG_SYS_NS16550_COM5)
246 serial_register(&eserial5_device);
247#endif
248#if defined(CONFIG_SYS_NS16550_COM6)
249 serial_register(&eserial6_device);
250#endif
Marek Vasutabc0ed82012-09-12 20:02:05 +0200251}
Scott Wood48cbc3a2012-10-16 15:43:15 -0500252
253#endif /* !CONFIG_NS16550_MIN_FUNCTIONS */