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78f6622a WD |
1 | /* |
2 | * (C) Copyright 2000 | |
3 | * Rob Taylor, Flying Pig Systems. robt@flyingpig.com. | |
4 | * | |
5 | * See file CREDITS for list of people who contributed to this | |
6 | * project. | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or | |
9 | * modify it under the terms of the GNU General Public License as | |
10 | * published by the Free Software Foundation; either version 2 of | |
11 | * the License, or (at your option) any later version. | |
12 | * | |
13 | * This program is distributed in the hope that it will be useful, | |
14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | * GNU General Public License for more details. | |
17 | * | |
18 | * You should have received a copy of the GNU General Public License | |
19 | * along with this program; if not, write to the Free Software | |
20 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, | |
21 | * MA 02111-1307 USA | |
22 | */ | |
23 | ||
24 | #include <common.h> | |
25 | ||
26 | #ifdef CFG_NS16550_SERIAL | |
27 | ||
28 | #include <ns16550.h> | |
29 | #ifdef CFG_NS87308 | |
30 | #include <ns87308.h> | |
31 | #endif | |
32 | ||
756f586a WD |
33 | #if !defined(CONFIG_CONS_INDEX) |
34 | #error "No console index specified." | |
35 | #elif (CONFIG_CONS_INDEX < 1) || (CONFIG_CONS_INDEX > 4) | |
36 | #error "Invalid console index value." | |
37 | #endif | |
38 | ||
39 | #if CONFIG_CONS_INDEX == 1 && !defined(CFG_NS16550_COM1) | |
40 | #error "Console port 1 defined but not configured." | |
41 | #elif CONFIG_CONS_INDEX == 2 && !defined(CFG_NS16550_COM2) | |
42 | #error "Console port 2 defined but not configured." | |
43 | #elif CONFIG_CONS_INDEX == 3 && !defined(CFG_NS16550_COM3) | |
44 | #error "Console port 3 defined but not configured." | |
45 | #elif CONFIG_CONS_INDEX == 4 && !defined(CFG_NS16550_COM4) | |
46 | #error "Console port 4 defined but not configured." | |
47 | #endif | |
48 | ||
49 | /* Note: The port number specified in the functions is 1 based. | |
50 | * the array is 0 based. | |
51 | */ | |
52 | static NS16550_t serial_ports[4] = { | |
53 | #ifdef CFG_NS16550_COM1 | |
54 | (NS16550_t)CFG_NS16550_COM1, | |
55 | #else | |
56 | NULL, | |
57 | #endif | |
58 | #ifdef CFG_NS16550_COM2 | |
59 | (NS16550_t)CFG_NS16550_COM2, | |
78f6622a | 60 | #else |
756f586a | 61 | NULL, |
78f6622a | 62 | #endif |
756f586a WD |
63 | #ifdef CFG_NS16550_COM3 |
64 | (NS16550_t)CFG_NS16550_COM3, | |
65 | #else | |
66 | NULL, | |
67 | #endif | |
68 | #ifdef CFG_NS16550_COM4 | |
69 | (NS16550_t)CFG_NS16550_COM4 | |
70 | #else | |
71 | NULL | |
72 | #endif | |
73 | }; | |
74 | ||
75 | #define PORT serial_ports[port-1] | |
76 | #define CONSOLE (serial_ports[CONFIG_CONS_INDEX-1]) | |
78f6622a | 77 | |
756f586a | 78 | static int calc_divisor (NS16550_t port) |
78f6622a WD |
79 | { |
80 | DECLARE_GLOBAL_DATA_PTR; | |
2e5983d2 WD |
81 | #ifdef CONFIG_OMAP1510 |
82 | /* If can't cleanly clock 115200 set div to 1 */ | |
83 | if ((CFG_NS16550_CLK == 12000000) && (gd->baudrate == 115200)) { | |
756f586a | 84 | port->osc_12m_sel = OSC_12M_SEL; /* enable 6.5 * divisor */ |
2e5983d2 WD |
85 | return (1); /* return 1 for base divisor */ |
86 | } | |
756f586a | 87 | port->osc_12m_sel = 0; /* clear if previsouly set */ |
6f21347d WD |
88 | #endif |
89 | #ifdef CONFIG_OMAP1610 | |
90 | /* If can't cleanly clock 115200 set div to 1 */ | |
91 | if ((CFG_NS16550_CLK == 48000000) && (gd->baudrate == 115200)) { | |
92 | return (26); /* return 26 for base divisor */ | |
93 | } | |
2e5983d2 | 94 | #endif |
8ed96046 WD |
95 | |
96 | #ifdef CONFIG_APTIX | |
97 | #define MODE_X_DIV 13 | |
98 | #else | |
99 | #define MODE_X_DIV 16 | |
100 | #endif | |
101 | return (CFG_NS16550_CLK / MODE_X_DIV / gd->baudrate); | |
102 | ||
2e5983d2 | 103 | } |
78f6622a | 104 | |
2e5983d2 WD |
105 | int serial_init (void) |
106 | { | |
756f586a | 107 | int clock_divisor; |
78f6622a WD |
108 | |
109 | #ifdef CFG_NS87308 | |
110 | initialise_ns87308(); | |
111 | #endif | |
112 | ||
756f586a WD |
113 | #ifdef CFG_NS16550_COM1 |
114 | clock_divisor = calc_divisor(serial_ports[0]); | |
115 | NS16550_init(serial_ports[0], clock_divisor); | |
116 | #endif | |
117 | #ifdef CFG_NS16550_COM2 | |
118 | clock_divisor = calc_divisor(serial_ports[1]); | |
119 | NS16550_init(serial_ports[1], clock_divisor); | |
120 | #endif | |
121 | #ifdef CFG_NS16550_COM3 | |
122 | clock_divisor = calc_divisor(serial_ports[2]); | |
123 | NS16550_init(serial_ports[2], clock_divisor); | |
124 | #endif | |
125 | #ifdef CFG_NS16550_COM4 | |
126 | clock_divisor = calc_divisor(serial_ports[3]); | |
127 | NS16550_init(serial_ports[3], clock_divisor); | |
128 | #endif | |
78f6622a WD |
129 | |
130 | return (0); | |
131 | } | |
132 | ||
133 | void | |
756f586a | 134 | _serial_putc(const char c,const int port) |
78f6622a WD |
135 | { |
136 | if (c == '\n') | |
756f586a | 137 | NS16550_putc(PORT, '\r'); |
78f6622a | 138 | |
756f586a | 139 | NS16550_putc(PORT, c); |
78f6622a WD |
140 | } |
141 | ||
142 | void | |
756f586a WD |
143 | _serial_putc_raw(const char c,const int port) |
144 | { | |
145 | NS16550_putc(PORT, c); | |
146 | } | |
147 | ||
148 | void | |
149 | _serial_puts (const char *s,const int port) | |
78f6622a WD |
150 | { |
151 | while (*s) { | |
756f586a | 152 | _serial_putc (*s++,port); |
78f6622a WD |
153 | } |
154 | } | |
155 | ||
156 | ||
157 | int | |
756f586a | 158 | _serial_getc(const int port) |
78f6622a | 159 | { |
756f586a | 160 | return NS16550_getc(PORT); |
78f6622a WD |
161 | } |
162 | ||
163 | int | |
756f586a | 164 | _serial_tstc(const int port) |
78f6622a | 165 | { |
756f586a | 166 | return NS16550_tstc(PORT); |
78f6622a WD |
167 | } |
168 | ||
169 | void | |
756f586a | 170 | _serial_setbrg (const int port) |
78f6622a | 171 | { |
2e5983d2 | 172 | int clock_divisor; |
78f6622a | 173 | |
756f586a WD |
174 | clock_divisor = calc_divisor(PORT); |
175 | NS16550_reinit(PORT, clock_divisor); | |
176 | } | |
177 | ||
178 | void | |
179 | serial_putc(const char c) | |
180 | { | |
181 | _serial_putc(c,CONFIG_CONS_INDEX); | |
182 | } | |
183 | ||
184 | void | |
185 | serial_putc_raw(const char c) | |
186 | { | |
187 | _serial_putc_raw(c,CONFIG_CONS_INDEX); | |
188 | } | |
189 | ||
190 | void | |
191 | serial_puts(const char *s) | |
192 | { | |
193 | _serial_puts(s,CONFIG_CONS_INDEX); | |
194 | } | |
195 | ||
196 | int | |
197 | serial_getc(void) | |
198 | { | |
199 | return _serial_getc(CONFIG_CONS_INDEX); | |
200 | } | |
201 | ||
202 | int | |
203 | serial_tstc(void) | |
204 | { | |
205 | return _serial_tstc(CONFIG_CONS_INDEX); | |
206 | } | |
207 | ||
208 | void | |
209 | serial_setbrg(void) | |
210 | { | |
211 | _serial_setbrg(CONFIG_CONS_INDEX); | |
78f6622a WD |
212 | } |
213 | ||
214 | #endif |