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[karo-tx-uboot.git] / drivers / serial / serial_ns16550.c
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 void
123 _serial_putc(const char c,const int port)
124 {
125         if (c == '\n')
126                 NS16550_putc(PORT, '\r');
127
128         NS16550_putc(PORT, c);
129 }
130
131 void
132 _serial_putc_raw(const char c,const int port)
133 {
134         NS16550_putc(PORT, c);
135 }
136
137 void
138 _serial_puts (const char *s,const int port)
139 {
140         while (*s) {
141                 _serial_putc (*s++,port);
142         }
143 }
144
145
146 int
147 _serial_getc(const int port)
148 {
149         return NS16550_getc(PORT);
150 }
151
152 int
153 _serial_tstc(const int port)
154 {
155         return NS16550_tstc(PORT);
156 }
157
158 void
159 _serial_setbrg (const int port)
160 {
161         int clock_divisor;
162
163         clock_divisor = ns16550_calc_divisor(PORT, CONFIG_SYS_NS16550_CLK,
164                                              gd->baudrate);
165         NS16550_reinit(PORT, clock_divisor);
166 }
167
168 static inline void
169 serial_putc_dev(unsigned int dev_index,const char c)
170 {
171         _serial_putc(c,dev_index);
172 }
173
174 static inline void
175 serial_putc_raw_dev(unsigned int dev_index,const char c)
176 {
177         _serial_putc_raw(c,dev_index);
178 }
179
180 static inline void
181 serial_puts_dev(unsigned int dev_index,const char *s)
182 {
183         _serial_puts(s,dev_index);
184 }
185
186 static inline int
187 serial_getc_dev(unsigned int dev_index)
188 {
189         return _serial_getc(dev_index);
190 }
191
192 static inline int
193 serial_tstc_dev(unsigned int dev_index)
194 {
195         return _serial_tstc(dev_index);
196 }
197
198 static inline void
199 serial_setbrg_dev(unsigned int dev_index)
200 {
201         _serial_setbrg(dev_index);
202 }
203
204 #if defined(CONFIG_SYS_NS16550_COM1)
205 DECLARE_ESERIAL_FUNCTIONS(1);
206 struct serial_device eserial1_device =
207         INIT_ESERIAL_STRUCTURE(1, "eserial0");
208 #endif
209 #if defined(CONFIG_SYS_NS16550_COM2)
210 DECLARE_ESERIAL_FUNCTIONS(2);
211 struct serial_device eserial2_device =
212         INIT_ESERIAL_STRUCTURE(2, "eserial1");
213 #endif
214 #if defined(CONFIG_SYS_NS16550_COM3)
215 DECLARE_ESERIAL_FUNCTIONS(3);
216 struct serial_device eserial3_device =
217         INIT_ESERIAL_STRUCTURE(3, "eserial2");
218 #endif
219 #if defined(CONFIG_SYS_NS16550_COM4)
220 DECLARE_ESERIAL_FUNCTIONS(4);
221 struct serial_device eserial4_device =
222         INIT_ESERIAL_STRUCTURE(4, "eserial3");
223 #endif
224 #if defined(CONFIG_SYS_NS16550_COM5)
225 DECLARE_ESERIAL_FUNCTIONS(5);
226 struct serial_device eserial5_device =
227         INIT_ESERIAL_STRUCTURE(5, "eserial4");
228 #endif
229 #if defined(CONFIG_SYS_NS16550_COM6)
230 DECLARE_ESERIAL_FUNCTIONS(6);
231 struct serial_device eserial6_device =
232         INIT_ESERIAL_STRUCTURE(6, "eserial5");
233 #endif
234
235 __weak struct serial_device *default_serial_console(void)
236 {
237 #if CONFIG_CONS_INDEX == 1
238         return &eserial1_device;
239 #elif CONFIG_CONS_INDEX == 2
240         return &eserial2_device;
241 #elif CONFIG_CONS_INDEX == 3
242         return &eserial3_device;
243 #elif CONFIG_CONS_INDEX == 4
244         return &eserial4_device;
245 #elif CONFIG_CONS_INDEX == 5
246         return &eserial5_device;
247 #elif CONFIG_CONS_INDEX == 6
248         return &eserial6_device;
249 #else
250 #error "Bad CONFIG_CONS_INDEX."
251 #endif
252 }
253
254 void ns16550_serial_initialize(void)
255 {
256 #if defined(CONFIG_SYS_NS16550_COM1)
257         serial_register(&eserial1_device);
258 #endif
259 #if defined(CONFIG_SYS_NS16550_COM2)
260         serial_register(&eserial2_device);
261 #endif
262 #if defined(CONFIG_SYS_NS16550_COM3)
263         serial_register(&eserial3_device);
264 #endif
265 #if defined(CONFIG_SYS_NS16550_COM4)
266         serial_register(&eserial4_device);
267 #endif
268 #if defined(CONFIG_SYS_NS16550_COM5)
269         serial_register(&eserial5_device);
270 #endif
271 #if defined(CONFIG_SYS_NS16550_COM6)
272         serial_register(&eserial6_device);
273 #endif
274 }
275
276 #endif /* !CONFIG_NS16550_MIN_FUNCTIONS */