Root/
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 | |
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> |
19 | #include <linux/serial_core.h> |
20 | #include <linux/init.h> |
21 | |
22 | #include <asm/prom.h> |
23 | |
24 | #include "suncore.h" |
25 | |
26 | static int sunserial_current_minor = 64; |
27 | |
28 | int sunserial_register_minors(struct uart_driver *drv, int count) |
29 | { |
30 | int err = 0; |
31 | |
32 | drv->minor = sunserial_current_minor; |
33 | drv->nr += count; |
34 | /* Register the driver on the first call */ |
35 | if (drv->nr == count) |
36 | err = uart_register_driver(drv); |
37 | if (err == 0) { |
38 | sunserial_current_minor += count; |
39 | drv->tty_driver->name_base = drv->minor - 64; |
40 | } |
41 | return err; |
42 | } |
43 | EXPORT_SYMBOL(sunserial_register_minors); |
44 | |
45 | void sunserial_unregister_minors(struct uart_driver *drv, int count) |
46 | { |
47 | drv->nr -= count; |
48 | sunserial_current_minor -= count; |
49 | |
50 | if (drv->nr == 0) |
51 | uart_unregister_driver(drv); |
52 | } |
53 | EXPORT_SYMBOL(sunserial_unregister_minors); |
54 | |
55 | int sunserial_console_match(struct console *con, struct device_node *dp, |
56 | struct uart_driver *drv, int line, bool ignore_line) |
57 | { |
58 | if (!con || of_console_device != dp) |
59 | return 0; |
60 | |
61 | if (!ignore_line) { |
62 | int off = 0; |
63 | |
64 | if (of_console_options && |
65 | *of_console_options == 'b') |
66 | off = 1; |
67 | |
68 | if ((line & 1) != off) |
69 | return 0; |
70 | } |
71 | |
72 | con->index = line; |
73 | drv->cons = con; |
74 | add_preferred_console(con->name, line, NULL); |
75 | |
76 | return 1; |
77 | } |
78 | EXPORT_SYMBOL(sunserial_console_match); |
79 | |
80 | void sunserial_console_termios(struct console *con, struct device_node *uart_dp) |
81 | { |
82 | const char *mode, *s; |
83 | char mode_prop[] = "ttyX-mode"; |
84 | int baud, bits, stop, cflag; |
85 | char parity; |
86 | |
87 | if (!strcmp(uart_dp->name, "rsc") || |
88 | !strcmp(uart_dp->name, "rsc-console") || |
89 | !strcmp(uart_dp->name, "rsc-control")) { |
90 | mode = of_get_property(uart_dp, |
91 | "ssp-console-modes", NULL); |
92 | if (!mode) |
93 | mode = "115200,8,n,1,-"; |
94 | } else if (!strcmp(uart_dp->name, "lom-console")) { |
95 | mode = "9600,8,n,1,-"; |
96 | } else { |
97 | struct device_node *dp; |
98 | char c; |
99 | |
100 | c = 'a'; |
101 | if (of_console_options) |
102 | c = *of_console_options; |
103 | |
104 | mode_prop[3] = c; |
105 | |
106 | dp = of_find_node_by_path("/options"); |
107 | mode = of_get_property(dp, mode_prop, NULL); |
108 | if (!mode) |
109 | mode = "9600,8,n,1,-"; |
110 | } |
111 | |
112 | cflag = CREAD | HUPCL | CLOCAL; |
113 | |
114 | s = mode; |
115 | baud = simple_strtoul(s, NULL, 0); |
116 | s = strchr(s, ','); |
117 | bits = simple_strtoul(++s, NULL, 0); |
118 | s = strchr(s, ','); |
119 | parity = *(++s); |
120 | s = strchr(s, ','); |
121 | stop = simple_strtoul(++s, NULL, 0); |
122 | s = strchr(s, ','); |
123 | /* XXX handshake is not handled here. */ |
124 | |
125 | switch (baud) { |
126 | case 150: cflag |= B150; break; |
127 | case 300: cflag |= B300; break; |
128 | case 600: cflag |= B600; break; |
129 | case 1200: cflag |= B1200; break; |
130 | case 2400: cflag |= B2400; break; |
131 | case 4800: cflag |= B4800; break; |
132 | case 9600: cflag |= B9600; break; |
133 | case 19200: cflag |= B19200; break; |
134 | case 38400: cflag |= B38400; break; |
135 | case 57600: cflag |= B57600; break; |
136 | case 115200: cflag |= B115200; break; |
137 | case 230400: cflag |= B230400; break; |
138 | case 460800: cflag |= B460800; break; |
139 | default: baud = 9600; cflag |= B9600; break; |
140 | } |
141 | |
142 | switch (bits) { |
143 | case 5: cflag |= CS5; break; |
144 | case 6: cflag |= CS6; break; |
145 | case 7: cflag |= CS7; break; |
146 | case 8: cflag |= CS8; break; |
147 | default: cflag |= CS8; break; |
148 | } |
149 | |
150 | switch (parity) { |
151 | case 'o': cflag |= (PARENB | PARODD); break; |
152 | case 'e': cflag |= PARENB; break; |
153 | case 'n': default: break; |
154 | } |
155 | |
156 | switch (stop) { |
157 | case 2: cflag |= CSTOPB; break; |
158 | case 1: default: break; |
159 | } |
160 | |
161 | con->cflag = cflag; |
162 | } |
163 | |
164 | /* Sun serial MOUSE auto baud rate detection. */ |
165 | static struct mouse_baud_cflag { |
166 | int baud; |
167 | unsigned int cflag; |
168 | } mouse_baud_table[] = { |
169 | { 1200, B1200 }, |
170 | { 2400, B2400 }, |
171 | { 4800, B4800 }, |
172 | { 9600, B9600 }, |
173 | { -1, ~0 }, |
174 | { -1, ~0 }, |
175 | }; |
176 | |
177 | unsigned int suncore_mouse_baud_cflag_next(unsigned int cflag, int *new_baud) |
178 | { |
179 | int i; |
180 | |
181 | for (i = 0; mouse_baud_table[i].baud != -1; i++) |
182 | if (mouse_baud_table[i].cflag == (cflag & CBAUD)) |
183 | break; |
184 | |
185 | i += 1; |
186 | if (mouse_baud_table[i].baud == -1) |
187 | i = 0; |
188 | |
189 | *new_baud = mouse_baud_table[i].baud; |
190 | return mouse_baud_table[i].cflag; |
191 | } |
192 | |
193 | EXPORT_SYMBOL(suncore_mouse_baud_cflag_next); |
194 | |
195 | /* Basically, when the baud rate is wrong the mouse spits out |
196 | * breaks to us. |
197 | */ |
198 | int suncore_mouse_baud_detection(unsigned char ch, int is_break) |
199 | { |
200 | static int mouse_got_break = 0; |
201 | static int ctr = 0; |
202 | |
203 | if (is_break) { |
204 | /* Let a few normal bytes go by before we jump the gun |
205 | * and say we need to try another baud rate. |
206 | */ |
207 | if (mouse_got_break && ctr < 8) |
208 | return 1; |
209 | |
210 | /* Ok, we need to try another baud. */ |
211 | ctr = 0; |
212 | mouse_got_break = 1; |
213 | return 2; |
214 | } |
215 | if (mouse_got_break) { |
216 | ctr++; |
217 | if (ch == 0x87) { |
218 | /* Correct baud rate determined. */ |
219 | mouse_got_break = 0; |
220 | } |
221 | return 1; |
222 | } |
223 | return 0; |
224 | } |
225 | |
226 | EXPORT_SYMBOL(suncore_mouse_baud_detection); |
227 | |
228 | static int __init suncore_init(void) |
229 | { |
230 | return 0; |
231 | } |
232 | |
233 | static void __exit suncore_exit(void) |
234 | { |
235 | } |
236 | |
237 | module_init(suncore_init); |
238 | module_exit(suncore_exit); |
239 | |
240 | MODULE_AUTHOR("Eddie C. Dost, David S. Miller"); |
241 | MODULE_DESCRIPTION("Sun serial common layer"); |
242 | MODULE_LICENSE("GPL"); |
243 |
Branches:
ben-wpan
ben-wpan-stefan
javiroman/ks7010
jz-2.6.34
jz-2.6.34-rc5
jz-2.6.34-rc6
jz-2.6.34-rc7
jz-2.6.35
jz-2.6.36
jz-2.6.37
jz-2.6.38
jz-2.6.39
jz-3.0
jz-3.1
jz-3.11
jz-3.12
jz-3.13
jz-3.15
jz-3.16
jz-3.18-dt
jz-3.2
jz-3.3
jz-3.4
jz-3.5
jz-3.6
jz-3.6-rc2-pwm
jz-3.9
jz-3.9-clk
jz-3.9-rc8
jz47xx
jz47xx-2.6.38
master
Tags:
od-2011-09-04
od-2011-09-18
v2.6.34-rc5
v2.6.34-rc6
v2.6.34-rc7
v3.9