1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
|
// SPDX-License-Identifier: GPL-2.0
/* suncore.c
*
* Common SUN serial routines. Based entirely
* upon drivers/sbus/char/sunserial.c which is:
*
* Copyright (C) 1997 Eddie C. Dost (ecd@skynet.be)
*
* Adaptation to new UART layer is:
*
* Copyright (C) 2002 David S. Miller (davem@redhat.com)
*/
#include <linux/kernel.h>
#include <linux/console.h>
#include <linux/tty.h>
#include <linux/errno.h>
#include <linux/string.h>
#include <linux/serial_core.h>
#include <linux/sunserialcore.h>
#include <linux/init.h>
#include <asm/prom.h>
static int sunserial_current_minor = 64;
int sunserial_register_minors(struct uart_driver *drv, int count)
{
int err = 0;
drv->minor = sunserial_current_minor;
drv->nr += count;
/* Register the driver on the first call */
if (drv->nr == count)
err = uart_register_driver(drv);
if (err == 0) {
sunserial_current_minor += count;
drv->tty_driver->name_base = drv->minor - 64;
}
return err;
}
EXPORT_SYMBOL(sunserial_register_minors);
void sunserial_unregister_minors(struct uart_driver *drv, int count)
{
drv->nr -= count;
sunserial_current_minor -= count;
if (drv->nr == 0)
uart_unregister_driver(drv);
}
EXPORT_SYMBOL(sunserial_unregister_minors);
int sunserial_console_match(struct console *con, struct device_node *dp,
struct uart_driver *drv, int line, bool ignore_line)
{
if (!con)
return 0;
drv->cons = con;
if (of_console_device != dp)
return 0;
if (!ignore_line) {
int off = 0;
if (of_console_options &&
*of_console_options == 'b')
off = 1;
if ((line & 1) != off)
return 0;
}
if (!console_set_on_cmdline) {
con->index = line;
add_preferred_console(con->name, line, NULL);
}
return 1;
}
EXPORT_SYMBOL(sunserial_console_match);
void sunserial_console_termios(struct console *con, struct device_node *uart_dp)
{
const char *mode, *s;
char mode_prop[] = "ttyX-mode";
int baud, bits, stop, cflag;
char parity;
if (!strcmp(uart_dp->name, "rsc") ||
!strcmp(uart_dp->name, "rsc-console") ||
!strcmp(uart_dp->name, "rsc-control")) {
mode = of_get_property(uart_dp,
"ssp-console-modes", NULL);
if (!mode)
mode = "115200,8,n,1,-";
} else if (!strcmp(uart_dp->name, "lom-console")) {
mode = "9600,8,n,1,-";
} else {
struct device_node *dp;
char c;
c = 'a';
if (of_console_options)
c = *of_console_options;
mode_prop[3] = c;
dp = of_find_node_by_path("/options");
mode = of_get_property(dp, mode_prop, NULL);
if (!mode)
mode = "9600,8,n,1,-";
}
cflag = CREAD | HUPCL | CLOCAL;
s = mode;
baud = simple_strtoul(s, NULL, 0);
s = strchr(s, ',');
bits = simple_strtoul(++s, NULL, 0);
s = strchr(s, ',');
parity = *(++s);
s = strchr(s, ',');
stop = simple_strtoul(++s, NULL, 0);
s = strchr(s, ',');
/* XXX handshake is not handled here. */
switch (baud) {
case 150: cflag |= B150; break;
case 300: cflag |= B300; break;
case 600: cflag |= B600; break;
case 1200: cflag |= B1200; break;
case 2400: cflag |= B2400; break;
case 4800: cflag |= B4800; break;
case 9600: cflag |= B9600; break;
case 19200: cflag |= B19200; break;
case 38400: cflag |= B38400; break;
case 57600: cflag |= B57600; break;
case 115200: cflag |= B115200; break;
case 230400: cflag |= B230400; break;
case 460800: cflag |= B460800; break;
default: baud = 9600; cflag |= B9600; break;
}
switch (bits) {
case 5: cflag |= CS5; break;
case 6: cflag |= CS6; break;
case 7: cflag |= CS7; break;
case 8: cflag |= CS8; break;
default: cflag |= CS8; break;
}
switch (parity) {
case 'o': cflag |= (PARENB | PARODD); break;
case 'e': cflag |= PARENB; break;
case 'n': default: break;
}
switch (stop) {
case 2: cflag |= CSTOPB; break;
case 1: default: break;
}
con->cflag = cflag;
}
/* Sun serial MOUSE auto baud rate detection. */
static struct mouse_baud_cflag {
int baud;
unsigned int cflag;
} mouse_baud_table[] = {
{ 1200, B1200 },
{ 2400, B2400 },
{ 4800, B4800 },
{ 9600, B9600 },
{ -1, ~0 },
{ -1, ~0 },
};
unsigned int suncore_mouse_baud_cflag_next(unsigned int cflag, int *new_baud)
{
int i;
for (i = 0; mouse_baud_table[i].baud != -1; i++)
if (mouse_baud_table[i].cflag == (cflag & CBAUD))
break;
i += 1;
if (mouse_baud_table[i].baud == -1)
i = 0;
*new_baud = mouse_baud_table[i].baud;
return mouse_baud_table[i].cflag;
}
EXPORT_SYMBOL(suncore_mouse_baud_cflag_next);
/* Basically, when the baud rate is wrong the mouse spits out
* breaks to us.
*/
int suncore_mouse_baud_detection(unsigned char ch, int is_break)
{
static int mouse_got_break = 0;
static int ctr = 0;
if (is_break) {
/* Let a few normal bytes go by before we jump the gun
* and say we need to try another baud rate.
*/
if (mouse_got_break && ctr < 8)
return 1;
/* Ok, we need to try another baud. */
ctr = 0;
mouse_got_break = 1;
return 2;
}
if (mouse_got_break) {
ctr++;
if (ch == 0x87) {
/* Correct baud rate determined. */
mouse_got_break = 0;
}
return 1;
}
return 0;
}
EXPORT_SYMBOL(suncore_mouse_baud_detection);
static int __init suncore_init(void)
{
return 0;
}
device_initcall(suncore_init);
#if 0 /* ..def MODULE ; never supported as such */
MODULE_AUTHOR("Eddie C. Dost, David S. Miller");
MODULE_DESCRIPTION("Sun serial common layer");
MODULE_LICENSE("GPL");
#endif
|
