1 /*
2  * (C) Copyright 2000
3  * Rob Taylor, Flying Pig Systems. robt@flyingpig.com.
4  *
5  * SPDX-License-Identifier:	GPL-2.0+
6  */
7 
8 #include <common.h>
9 #include <linux/compiler.h>
10 
11 #include <ns16550.h>
12 #ifdef CONFIG_NS87308
13 #include <ns87308.h>
14 #endif
15 
16 #include <serial.h>
17 
18 #ifndef CONFIG_NS16550_MIN_FUNCTIONS
19 
20 DECLARE_GLOBAL_DATA_PTR;
21 
22 #if !defined(CONFIG_CONS_INDEX)
23 #elif (CONFIG_CONS_INDEX < 1) || (CONFIG_CONS_INDEX > 6)
24 #error	"Invalid console index value."
25 #endif
26 
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."
39 #endif
40 
41 /* Note: The port number specified in the functions is 1 based.
42  *	 the array is 0 based.
43  */
44 static NS16550_t serial_ports[6] = {
45 #ifdef CONFIG_SYS_NS16550_COM1
46 	(NS16550_t)CONFIG_SYS_NS16550_COM1,
47 #else
48 	NULL,
49 #endif
50 #ifdef CONFIG_SYS_NS16550_COM2
51 	(NS16550_t)CONFIG_SYS_NS16550_COM2,
52 #else
53 	NULL,
54 #endif
55 #ifdef CONFIG_SYS_NS16550_COM3
56 	(NS16550_t)CONFIG_SYS_NS16550_COM3,
57 #else
58 	NULL,
59 #endif
60 #ifdef CONFIG_SYS_NS16550_COM4
61 	(NS16550_t)CONFIG_SYS_NS16550_COM4,
62 #else
63 	NULL,
64 #endif
65 #ifdef CONFIG_SYS_NS16550_COM5
66 	(NS16550_t)CONFIG_SYS_NS16550_COM5,
67 #else
68 	NULL,
69 #endif
70 #ifdef CONFIG_SYS_NS16550_COM6
71 	(NS16550_t)CONFIG_SYS_NS16550_COM6
72 #else
73 	NULL
74 #endif
75 };
76 
77 #define PORT	serial_ports[port-1]
78 
79 /* Multi serial device functions */
80 #define DECLARE_ESERIAL_FUNCTIONS(port) \
81 	static int  eserial##port##_init(void) \
82 	{ \
83 		int clock_divisor; \
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); \
87 		return 0 ; \
88 	} \
89 	static void eserial##port##_setbrg(void) \
90 	{ \
91 		serial_setbrg_dev(port); \
92 	} \
93 	static int  eserial##port##_getc(void) \
94 	{ \
95 		return serial_getc_dev(port); \
96 	} \
97 	static int  eserial##port##_tstc(void) \
98 	{ \
99 		return serial_tstc_dev(port); \
100 	} \
101 	static void eserial##port##_putc(const char c) \
102 	{ \
103 		serial_putc_dev(port, c); \
104 	} \
105 	static void eserial##port##_puts(const char *s) \
106 	{ \
107 		serial_puts_dev(port, s); \
108 	}
109 
110 /* Serial device descriptor */
111 #define INIT_ESERIAL_STRUCTURE(port, __name) {	\
112 	.name	= __name,			\
113 	.start	= eserial##port##_init,		\
114 	.stop	= NULL,				\
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,		\
120 }
121 
122 static void _serial_putc(const char c, const int port)
123 {
124 	if (c == '\n')
125 		NS16550_putc(PORT, '\r');
126 
127 	NS16550_putc(PORT, c);
128 }
129 
130 static void _serial_puts(const char *s, const int port)
131 {
132 	while (*s) {
133 		_serial_putc(*s++, port);
134 	}
135 }
136 
137 static int _serial_getc(const int port)
138 {
139 	return NS16550_getc(PORT);
140 }
141 
142 static int _serial_tstc(const int port)
143 {
144 	return NS16550_tstc(PORT);
145 }
146 
147 static void _serial_setbrg(const int port)
148 {
149 	int clock_divisor;
150 
151 	clock_divisor = ns16550_calc_divisor(PORT, CONFIG_SYS_NS16550_CLK,
152 					     gd->baudrate);
153 	NS16550_reinit(PORT, clock_divisor);
154 }
155 
156 static inline void
157 serial_putc_dev(unsigned int dev_index,const char c)
158 {
159 	_serial_putc(c,dev_index);
160 }
161 
162 static inline void
163 serial_puts_dev(unsigned int dev_index,const char *s)
164 {
165 	_serial_puts(s,dev_index);
166 }
167 
168 static inline int
169 serial_getc_dev(unsigned int dev_index)
170 {
171 	return _serial_getc(dev_index);
172 }
173 
174 static inline int
175 serial_tstc_dev(unsigned int dev_index)
176 {
177 	return _serial_tstc(dev_index);
178 }
179 
180 static inline void
181 serial_setbrg_dev(unsigned int dev_index)
182 {
183 	_serial_setbrg(dev_index);
184 }
185 
186 #if defined(CONFIG_SYS_NS16550_COM1)
187 DECLARE_ESERIAL_FUNCTIONS(1);
188 struct serial_device eserial1_device =
189 	INIT_ESERIAL_STRUCTURE(1, "eserial0");
190 #endif
191 #if defined(CONFIG_SYS_NS16550_COM2)
192 DECLARE_ESERIAL_FUNCTIONS(2);
193 struct serial_device eserial2_device =
194 	INIT_ESERIAL_STRUCTURE(2, "eserial1");
195 #endif
196 #if defined(CONFIG_SYS_NS16550_COM3)
197 DECLARE_ESERIAL_FUNCTIONS(3);
198 struct serial_device eserial3_device =
199 	INIT_ESERIAL_STRUCTURE(3, "eserial2");
200 #endif
201 #if defined(CONFIG_SYS_NS16550_COM4)
202 DECLARE_ESERIAL_FUNCTIONS(4);
203 struct serial_device eserial4_device =
204 	INIT_ESERIAL_STRUCTURE(4, "eserial3");
205 #endif
206 #if defined(CONFIG_SYS_NS16550_COM5)
207 DECLARE_ESERIAL_FUNCTIONS(5);
208 struct serial_device eserial5_device =
209 	INIT_ESERIAL_STRUCTURE(5, "eserial4");
210 #endif
211 #if defined(CONFIG_SYS_NS16550_COM6)
212 DECLARE_ESERIAL_FUNCTIONS(6);
213 struct serial_device eserial6_device =
214 	INIT_ESERIAL_STRUCTURE(6, "eserial5");
215 #endif
216 
217 __weak struct serial_device *default_serial_console(void)
218 {
219 #if CONFIG_CONS_INDEX == 1
220 	return &eserial1_device;
221 #elif CONFIG_CONS_INDEX == 2
222 	return &eserial2_device;
223 #elif CONFIG_CONS_INDEX == 3
224 	return &eserial3_device;
225 #elif CONFIG_CONS_INDEX == 4
226 	return &eserial4_device;
227 #elif CONFIG_CONS_INDEX == 5
228 	return &eserial5_device;
229 #elif CONFIG_CONS_INDEX == 6
230 	return &eserial6_device;
231 #else
232 #error "Bad CONFIG_CONS_INDEX."
233 #endif
234 }
235 
236 void ns16550_serial_initialize(void)
237 {
238 #if defined(CONFIG_SYS_NS16550_COM1)
239 	serial_register(&eserial1_device);
240 #endif
241 #if defined(CONFIG_SYS_NS16550_COM2)
242 	serial_register(&eserial2_device);
243 #endif
244 #if defined(CONFIG_SYS_NS16550_COM3)
245 	serial_register(&eserial3_device);
246 #endif
247 #if defined(CONFIG_SYS_NS16550_COM4)
248 	serial_register(&eserial4_device);
249 #endif
250 #if defined(CONFIG_SYS_NS16550_COM5)
251 	serial_register(&eserial5_device);
252 #endif
253 #if defined(CONFIG_SYS_NS16550_COM6)
254 	serial_register(&eserial6_device);
255 #endif
256 }
257 
258 #endif /* !CONFIG_NS16550_MIN_FUNCTIONS */
259