blob: 6e4ac8db2d79169da320cc028a47423628b51f0f [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/* 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
Linus Torvalds1da177e2005-04-16 15:20:36 -070013#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>
David S. Millerc73fcc82007-07-20 16:59:26 -070019#include <linux/serial_core.h>
Paul Gortmaker68163832012-02-09 18:48:19 -050020#include <linux/sunserialcore.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070021#include <linux/init.h>
22
David S. Millerc73fcc82007-07-20 16:59:26 -070023#include <asm/prom.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070024
Linus Torvalds1da177e2005-04-16 15:20:36 -070025
Martin Habets58d784a2007-12-11 03:37:04 -080026static int sunserial_current_minor = 64;
Linus Torvalds1da177e2005-04-16 15:20:36 -070027
Martin Habets58d784a2007-12-11 03:37:04 -080028int sunserial_register_minors(struct uart_driver *drv, int count)
29{
30 int err = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -070031
Martin Habets58d784a2007-12-11 03:37:04 -080032 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}
43EXPORT_SYMBOL(sunserial_register_minors);
44
45void 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}
53EXPORT_SYMBOL(sunserial_unregister_minors);
54
David S. Millerfb445ee2007-12-29 01:19:49 -080055int sunserial_console_match(struct console *con, struct device_node *dp,
David S. Miller4e3533d2009-11-24 14:03:34 -080056 struct uart_driver *drv, int line, bool ignore_line)
David S. Millerc73fcc82007-07-20 16:59:26 -070057{
David S. Miller0a492892010-08-15 00:26:14 -070058 if (!con)
59 return 0;
60
61 drv->cons = con;
62
63 if (of_console_device != dp)
David S. Millerc73fcc82007-07-20 16:59:26 -070064 return 0;
65
David S. Miller4e3533d2009-11-24 14:03:34 -080066 if (!ignore_line) {
67 int off = 0;
David S. Millerc73fcc82007-07-20 16:59:26 -070068
David S. Miller4e3533d2009-11-24 14:03:34 -080069 if (of_console_options &&
70 *of_console_options == 'b')
71 off = 1;
72
73 if ((line & 1) != off)
74 return 0;
75 }
David S. Millerc73fcc82007-07-20 16:59:26 -070076
David S. Miller0a492892010-08-15 00:26:14 -070077 if (!console_set_on_cmdline) {
78 con->index = line;
David S. Miller7c1f6af2010-05-25 23:51:17 -070079 add_preferred_console(con->name, line, NULL);
David S. Miller0a492892010-08-15 00:26:14 -070080 }
David S. Millerc73fcc82007-07-20 16:59:26 -070081 return 1;
82}
83EXPORT_SYMBOL(sunserial_console_match);
84
David S. Miller457931d2009-11-24 14:09:56 -080085void sunserial_console_termios(struct console *con, struct device_node *uart_dp)
Linus Torvalds1da177e2005-04-16 15:20:36 -070086{
David S. Miller457931d2009-11-24 14:09:56 -080087 const char *mode, *s;
Jan Engelhardtb00ccd02007-05-27 14:48:54 -070088 char mode_prop[] = "ttyX-mode";
Linus Torvalds1da177e2005-04-16 15:20:36 -070089 int baud, bits, stop, cflag;
90 char parity;
Linus Torvalds1da177e2005-04-16 15:20:36 -070091
David S. Miller457931d2009-11-24 14:09:56 -080092 if (!strcmp(uart_dp->name, "rsc") ||
93 !strcmp(uart_dp->name, "rsc-console") ||
94 !strcmp(uart_dp->name, "rsc-control")) {
95 mode = of_get_property(uart_dp,
David S. Millerc73fcc82007-07-20 16:59:26 -070096 "ssp-console-modes", NULL);
97 if (!mode)
98 mode = "115200,8,n,1,-";
David S. Miller457931d2009-11-24 14:09:56 -080099 } else if (!strcmp(uart_dp->name, "lom-console")) {
100 mode = "9600,8,n,1,-";
David S. Millerc73fcc82007-07-20 16:59:26 -0700101 } else {
David S. Miller457931d2009-11-24 14:09:56 -0800102 struct device_node *dp;
David S. Millerc73fcc82007-07-20 16:59:26 -0700103 char c;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700104
David S. Millerc73fcc82007-07-20 16:59:26 -0700105 c = 'a';
106 if (of_console_options)
107 c = *of_console_options;
Eddie C. Dostc126cf82006-01-18 14:54:31 -0800108
David S. Millerc73fcc82007-07-20 16:59:26 -0700109 mode_prop[3] = c;
Eddie C. Dostc126cf82006-01-18 14:54:31 -0800110
David S. Miller457931d2009-11-24 14:09:56 -0800111 dp = of_find_node_by_path("/options");
David S. Millerc73fcc82007-07-20 16:59:26 -0700112 mode = of_get_property(dp, mode_prop, NULL);
113 if (!mode)
114 mode = "9600,8,n,1,-";
Linus Torvalds1da177e2005-04-16 15:20:36 -0700115 }
116
Linus Torvalds1da177e2005-04-16 15:20:36 -0700117 cflag = CREAD | HUPCL | CLOCAL;
118
119 s = mode;
120 baud = simple_strtoul(s, NULL, 0);
121 s = strchr(s, ',');
122 bits = simple_strtoul(++s, NULL, 0);
123 s = strchr(s, ',');
124 parity = *(++s);
125 s = strchr(s, ',');
126 stop = simple_strtoul(++s, NULL, 0);
127 s = strchr(s, ',');
128 /* XXX handshake is not handled here. */
129
130 switch (baud) {
131 case 150: cflag |= B150; break;
132 case 300: cflag |= B300; break;
133 case 600: cflag |= B600; break;
134 case 1200: cflag |= B1200; break;
135 case 2400: cflag |= B2400; break;
136 case 4800: cflag |= B4800; break;
137 case 9600: cflag |= B9600; break;
138 case 19200: cflag |= B19200; break;
139 case 38400: cflag |= B38400; break;
Eddie C. Dostc126cf82006-01-18 14:54:31 -0800140 case 57600: cflag |= B57600; break;
141 case 115200: cflag |= B115200; break;
142 case 230400: cflag |= B230400; break;
143 case 460800: cflag |= B460800; break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700144 default: baud = 9600; cflag |= B9600; break;
145 }
146
147 switch (bits) {
148 case 5: cflag |= CS5; break;
149 case 6: cflag |= CS6; break;
150 case 7: cflag |= CS7; break;
151 case 8: cflag |= CS8; break;
152 default: cflag |= CS8; break;
153 }
154
155 switch (parity) {
156 case 'o': cflag |= (PARENB | PARODD); break;
157 case 'e': cflag |= PARENB; break;
158 case 'n': default: break;
159 }
160
161 switch (stop) {
162 case 2: cflag |= CSTOPB; break;
163 case 1: default: break;
164 }
165
166 con->cflag = cflag;
167}
168
Linus Torvalds1da177e2005-04-16 15:20:36 -0700169/* Sun serial MOUSE auto baud rate detection. */
170static struct mouse_baud_cflag {
171 int baud;
172 unsigned int cflag;
173} mouse_baud_table[] = {
174 { 1200, B1200 },
175 { 2400, B2400 },
176 { 4800, B4800 },
177 { 9600, B9600 },
178 { -1, ~0 },
179 { -1, ~0 },
180};
181
182unsigned int suncore_mouse_baud_cflag_next(unsigned int cflag, int *new_baud)
183{
184 int i;
185
186 for (i = 0; mouse_baud_table[i].baud != -1; i++)
187 if (mouse_baud_table[i].cflag == (cflag & CBAUD))
188 break;
189
190 i += 1;
191 if (mouse_baud_table[i].baud == -1)
192 i = 0;
193
194 *new_baud = mouse_baud_table[i].baud;
195 return mouse_baud_table[i].cflag;
196}
197
198EXPORT_SYMBOL(suncore_mouse_baud_cflag_next);
199
200/* Basically, when the baud rate is wrong the mouse spits out
201 * breaks to us.
202 */
203int suncore_mouse_baud_detection(unsigned char ch, int is_break)
204{
205 static int mouse_got_break = 0;
206 static int ctr = 0;
207
208 if (is_break) {
209 /* Let a few normal bytes go by before we jump the gun
210 * and say we need to try another baud rate.
211 */
212 if (mouse_got_break && ctr < 8)
213 return 1;
214
215 /* Ok, we need to try another baud. */
216 ctr = 0;
217 mouse_got_break = 1;
218 return 2;
219 }
220 if (mouse_got_break) {
221 ctr++;
222 if (ch == 0x87) {
223 /* Correct baud rate determined. */
224 mouse_got_break = 0;
225 }
226 return 1;
227 }
228 return 0;
229}
230
231EXPORT_SYMBOL(suncore_mouse_baud_detection);
232
233static int __init suncore_init(void)
234{
235 return 0;
236}
237
238static void __exit suncore_exit(void)
239{
240}
241
242module_init(suncore_init);
243module_exit(suncore_exit);
244
245MODULE_AUTHOR("Eddie C. Dost, David S. Miller");
246MODULE_DESCRIPTION("Sun serial common layer");
247MODULE_LICENSE("GPL");