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1da177e4 LT |
1 | /* suncore.c |
2 | * | |
3 | * Common SUN serial routines. Based entirely | |
4 | * upon drivers/sbus/char/sunserial.c which is: | |
5 | * | |
6 | * Copyright (C) 1997 Eddie C. Dost (ecd@skynet.be) | |
7 | * | |
8 | * Adaptation to new UART layer is: | |
9 | * | |
10 | * Copyright (C) 2002 David S. Miller (davem@redhat.com) | |
11 | */ | |
12 | ||
1da177e4 LT |
13 | #include <linux/module.h> |
14 | #include <linux/kernel.h> | |
15 | #include <linux/console.h> | |
16 | #include <linux/tty.h> | |
17 | #include <linux/errno.h> | |
18 | #include <linux/string.h> | |
c73fcc84 | 19 | #include <linux/serial_core.h> |
1da177e4 LT |
20 | #include <linux/init.h> |
21 | ||
c73fcc84 | 22 | #include <asm/prom.h> |
1da177e4 LT |
23 | |
24 | #include "suncore.h" | |
25 | ||
26 | int sunserial_current_minor = 64; | |
27 | ||
28 | EXPORT_SYMBOL(sunserial_current_minor); | |
29 | ||
c73fcc84 DM |
30 | int sunserial_console_match(struct console *con, struct device_node *dp, |
31 | struct uart_driver *drv, int line) | |
1da177e4 | 32 | { |
c73fcc84 | 33 | int off; |
1da177e4 | 34 | |
c73fcc84 DM |
35 | if (!con || of_console_device != dp) |
36 | return 0; | |
1da177e4 | 37 | |
c73fcc84 DM |
38 | off = 0; |
39 | if (of_console_options && | |
40 | *of_console_options == 'b') | |
41 | off = 1; | |
1da177e4 | 42 | |
c73fcc84 DM |
43 | if ((line & 1) != off) |
44 | return 0; | |
1da177e4 | 45 | |
c73fcc84 DM |
46 | con->index = line; |
47 | drv->cons = con; | |
48 | add_preferred_console(con->name, line, NULL); | |
1da177e4 | 49 | |
c73fcc84 DM |
50 | return 1; |
51 | } | |
52 | EXPORT_SYMBOL(sunserial_console_match); | |
1da177e4 | 53 | |
c73fcc84 DM |
54 | void |
55 | sunserial_console_termios(struct console *con) | |
56 | { | |
57 | struct device_node *dp; | |
58 | const char *od, *mode, *s; | |
59 | char mode_prop[] = "ttyX-mode"; | |
60 | int baud, bits, stop, cflag; | |
61 | char parity; | |
1da177e4 | 62 | |
c73fcc84 DM |
63 | dp = of_find_node_by_path("/options"); |
64 | od = of_get_property(dp, "output-device", NULL); | |
65 | if (!strcmp(od, "rsc")) { | |
66 | mode = of_get_property(of_console_device, | |
67 | "ssp-console-modes", NULL); | |
68 | if (!mode) | |
69 | mode = "115200,8,n,1,-"; | |
70 | } else { | |
71 | char c; | |
72 | ||
73 | c = 'a'; | |
74 | if (of_console_options) | |
75 | c = *of_console_options; | |
76 | ||
77 | mode_prop[3] = c; | |
78 | ||
79 | mode = of_get_property(dp, mode_prop, NULL); | |
80 | if (!mode) | |
81 | mode = "9600,8,n,1,-"; | |
1da177e4 LT |
82 | } |
83 | ||
1da177e4 LT |
84 | cflag = CREAD | HUPCL | CLOCAL; |
85 | ||
86 | s = mode; | |
87 | baud = simple_strtoul(s, NULL, 0); | |
88 | s = strchr(s, ','); | |
89 | bits = simple_strtoul(++s, NULL, 0); | |
90 | s = strchr(s, ','); | |
91 | parity = *(++s); | |
92 | s = strchr(s, ','); | |
93 | stop = simple_strtoul(++s, NULL, 0); | |
94 | s = strchr(s, ','); | |
95 | /* XXX handshake is not handled here. */ | |
96 | ||
97 | switch (baud) { | |
98 | case 150: cflag |= B150; break; | |
99 | case 300: cflag |= B300; break; | |
100 | case 600: cflag |= B600; break; | |
101 | case 1200: cflag |= B1200; break; | |
102 | case 2400: cflag |= B2400; break; | |
103 | case 4800: cflag |= B4800; break; | |
104 | case 9600: cflag |= B9600; break; | |
105 | case 19200: cflag |= B19200; break; | |
106 | case 38400: cflag |= B38400; break; | |
c126cf80 ED |
107 | case 57600: cflag |= B57600; break; |
108 | case 115200: cflag |= B115200; break; | |
109 | case 230400: cflag |= B230400; break; | |
110 | case 460800: cflag |= B460800; break; | |
1da177e4 LT |
111 | default: baud = 9600; cflag |= B9600; break; |
112 | } | |
113 | ||
114 | switch (bits) { | |
115 | case 5: cflag |= CS5; break; | |
116 | case 6: cflag |= CS6; break; | |
117 | case 7: cflag |= CS7; break; | |
118 | case 8: cflag |= CS8; break; | |
119 | default: cflag |= CS8; break; | |
120 | } | |
121 | ||
122 | switch (parity) { | |
123 | case 'o': cflag |= (PARENB | PARODD); break; | |
124 | case 'e': cflag |= PARENB; break; | |
125 | case 'n': default: break; | |
126 | } | |
127 | ||
128 | switch (stop) { | |
129 | case 2: cflag |= CSTOPB; break; | |
130 | case 1: default: break; | |
131 | } | |
132 | ||
133 | con->cflag = cflag; | |
134 | } | |
135 | ||
136 | EXPORT_SYMBOL(sunserial_console_termios); | |
137 | ||
138 | /* Sun serial MOUSE auto baud rate detection. */ | |
139 | static struct mouse_baud_cflag { | |
140 | int baud; | |
141 | unsigned int cflag; | |
142 | } mouse_baud_table[] = { | |
143 | { 1200, B1200 }, | |
144 | { 2400, B2400 }, | |
145 | { 4800, B4800 }, | |
146 | { 9600, B9600 }, | |
147 | { -1, ~0 }, | |
148 | { -1, ~0 }, | |
149 | }; | |
150 | ||
151 | unsigned int suncore_mouse_baud_cflag_next(unsigned int cflag, int *new_baud) | |
152 | { | |
153 | int i; | |
154 | ||
155 | for (i = 0; mouse_baud_table[i].baud != -1; i++) | |
156 | if (mouse_baud_table[i].cflag == (cflag & CBAUD)) | |
157 | break; | |
158 | ||
159 | i += 1; | |
160 | if (mouse_baud_table[i].baud == -1) | |
161 | i = 0; | |
162 | ||
163 | *new_baud = mouse_baud_table[i].baud; | |
164 | return mouse_baud_table[i].cflag; | |
165 | } | |
166 | ||
167 | EXPORT_SYMBOL(suncore_mouse_baud_cflag_next); | |
168 | ||
169 | /* Basically, when the baud rate is wrong the mouse spits out | |
170 | * breaks to us. | |
171 | */ | |
172 | int suncore_mouse_baud_detection(unsigned char ch, int is_break) | |
173 | { | |
174 | static int mouse_got_break = 0; | |
175 | static int ctr = 0; | |
176 | ||
177 | if (is_break) { | |
178 | /* Let a few normal bytes go by before we jump the gun | |
179 | * and say we need to try another baud rate. | |
180 | */ | |
181 | if (mouse_got_break && ctr < 8) | |
182 | return 1; | |
183 | ||
184 | /* Ok, we need to try another baud. */ | |
185 | ctr = 0; | |
186 | mouse_got_break = 1; | |
187 | return 2; | |
188 | } | |
189 | if (mouse_got_break) { | |
190 | ctr++; | |
191 | if (ch == 0x87) { | |
192 | /* Correct baud rate determined. */ | |
193 | mouse_got_break = 0; | |
194 | } | |
195 | return 1; | |
196 | } | |
197 | return 0; | |
198 | } | |
199 | ||
200 | EXPORT_SYMBOL(suncore_mouse_baud_detection); | |
201 | ||
202 | static int __init suncore_init(void) | |
203 | { | |
204 | return 0; | |
205 | } | |
206 | ||
207 | static void __exit suncore_exit(void) | |
208 | { | |
209 | } | |
210 | ||
211 | module_init(suncore_init); | |
212 | module_exit(suncore_exit); | |
213 | ||
214 | MODULE_AUTHOR("Eddie C. Dost, David S. Miller"); | |
215 | MODULE_DESCRIPTION("Sun serial common layer"); | |
216 | MODULE_LICENSE("GPL"); |