1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3  * (C) Copyright 2000
4  * Rob Taylor, Flying Pig Systems. robt@flyingpig.com.
5  */
6 
7 #include <common.h>
8 #include <linux/compiler.h>
9 
10 #include <ns16550.h>
11 #ifdef CONFIG_NS87308
12 #include <ns87308.h>
13 #endif
14 
15 #include <serial.h>
16 
17 #ifndef CONFIG_NS16550_MIN_FUNCTIONS
18 
19 DECLARE_GLOBAL_DATA_PTR;
20 
21 #if !defined(CONFIG_CONS_INDEX)
22 #elif (CONFIG_CONS_INDEX < 1) || (CONFIG_CONS_INDEX > 6)
23 #error	"Invalid console index value."
24 #endif
25 
26 #if CONFIG_CONS_INDEX == 1 && !defined(CONFIG_SYS_NS16550_COM1)
27 #error	"Console port 1 defined but not configured."
28 #elif CONFIG_CONS_INDEX == 2 && !defined(CONFIG_SYS_NS16550_COM2)
29 #error	"Console port 2 defined but not configured."
30 #elif CONFIG_CONS_INDEX == 3 && !defined(CONFIG_SYS_NS16550_COM3)
31 #error	"Console port 3 defined but not configured."
32 #elif CONFIG_CONS_INDEX == 4 && !defined(CONFIG_SYS_NS16550_COM4)
33 #error	"Console port 4 defined but not configured."
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."
38 #endif
39 
40 /* Note: The port number specified in the functions is 1 based.
41  *	 the array is 0 based.
42  */
43 static NS16550_t serial_ports[6] = {
44 #ifdef CONFIG_SYS_NS16550_COM1
45 	(NS16550_t)CONFIG_SYS_NS16550_COM1,
46 #else
47 	NULL,
48 #endif
49 #ifdef CONFIG_SYS_NS16550_COM2
50 	(NS16550_t)CONFIG_SYS_NS16550_COM2,
51 #else
52 	NULL,
53 #endif
54 #ifdef CONFIG_SYS_NS16550_COM3
55 	(NS16550_t)CONFIG_SYS_NS16550_COM3,
56 #else
57 	NULL,
58 #endif
59 #ifdef CONFIG_SYS_NS16550_COM4
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
71 #else
72 	NULL
73 #endif
74 };
75 
76 #define PORT	serial_ports[port-1]
77 
78 /* Multi serial device functions */
79 #define DECLARE_ESERIAL_FUNCTIONS(port) \
80 	static int  eserial##port##_init(void) \
81 	{ \
82 		int clock_divisor; \
83 		clock_divisor = ns16550_calc_divisor(serial_ports[port-1], \
84 				CONFIG_SYS_NS16550_CLK, gd->baudrate); \
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 	}
108 
109 /* Serial device descriptor */
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 }
120 
121 static void _serial_putc(const char c, const int port)
122 {
123 	if (c == '\n')
124 		NS16550_putc(PORT, '\r');
125 
126 	NS16550_putc(PORT, c);
127 }
128 
129 static void _serial_puts(const char *s, const int port)
130 {
131 	while (*s) {
132 		_serial_putc(*s++, port);
133 	}
134 }
135 
136 static int _serial_getc(const int port)
137 {
138 	return NS16550_getc(PORT);
139 }
140 
141 static int _serial_tstc(const int port)
142 {
143 	return NS16550_tstc(PORT);
144 }
145 
146 static void _serial_setbrg(const int port)
147 {
148 	int clock_divisor;
149 
150 	clock_divisor = ns16550_calc_divisor(PORT, CONFIG_SYS_NS16550_CLK,
151 					     gd->baudrate);
152 	NS16550_reinit(PORT, clock_divisor);
153 }
154 
155 static inline void
156 serial_putc_dev(unsigned int dev_index,const char c)
157 {
158 	_serial_putc(c,dev_index);
159 }
160 
161 static inline void
162 serial_puts_dev(unsigned int dev_index,const char *s)
163 {
164 	_serial_puts(s,dev_index);
165 }
166 
167 static inline int
168 serial_getc_dev(unsigned int dev_index)
169 {
170 	return _serial_getc(dev_index);
171 }
172 
173 static inline int
174 serial_tstc_dev(unsigned int dev_index)
175 {
176 	return _serial_tstc(dev_index);
177 }
178 
179 static inline void
180 serial_setbrg_dev(unsigned int dev_index)
181 {
182 	_serial_setbrg(dev_index);
183 }
184 
185 #if defined(CONFIG_SYS_NS16550_COM1)
186 DECLARE_ESERIAL_FUNCTIONS(1);
187 struct serial_device eserial1_device =
188 	INIT_ESERIAL_STRUCTURE(1, "eserial0");
189 #endif
190 #if defined(CONFIG_SYS_NS16550_COM2)
191 DECLARE_ESERIAL_FUNCTIONS(2);
192 struct serial_device eserial2_device =
193 	INIT_ESERIAL_STRUCTURE(2, "eserial1");
194 #endif
195 #if defined(CONFIG_SYS_NS16550_COM3)
196 DECLARE_ESERIAL_FUNCTIONS(3);
197 struct serial_device eserial3_device =
198 	INIT_ESERIAL_STRUCTURE(3, "eserial2");
199 #endif
200 #if defined(CONFIG_SYS_NS16550_COM4)
201 DECLARE_ESERIAL_FUNCTIONS(4);
202 struct serial_device eserial4_device =
203 	INIT_ESERIAL_STRUCTURE(4, "eserial3");
204 #endif
205 #if defined(CONFIG_SYS_NS16550_COM5)
206 DECLARE_ESERIAL_FUNCTIONS(5);
207 struct serial_device eserial5_device =
208 	INIT_ESERIAL_STRUCTURE(5, "eserial4");
209 #endif
210 #if defined(CONFIG_SYS_NS16550_COM6)
211 DECLARE_ESERIAL_FUNCTIONS(6);
212 struct serial_device eserial6_device =
213 	INIT_ESERIAL_STRUCTURE(6, "eserial5");
214 #endif
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;
226 #elif CONFIG_CONS_INDEX == 5
227 	return &eserial5_device;
228 #elif CONFIG_CONS_INDEX == 6
229 	return &eserial6_device;
230 #else
231 #error "Bad CONFIG_CONS_INDEX."
232 #endif
233 }
234 
235 void 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
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
255 }
256 
257 #endif /* !CONFIG_NS16550_MIN_FUNCTIONS */
258