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|
/* 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/config.h>
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/console.h>
#include <linux/tty.h>
#include <linux/errno.h>
#include <linux/string.h>
#include <linux/init.h>
#include <asm/oplib.h>
#include "suncore.h"
int sunserial_current_minor = 64;
EXPORT_SYMBOL(sunserial_current_minor);
void
sunserial_console_termios(struct console *con)
{
char mode[16], buf[16], *s;
char *mode_prop = "ttyX-mode";
char *cd_prop = "ttyX-ignore-cd";
char *dtr_prop = "ttyX-rts-dtr-off";
char *ssp_console_modes_prop = "ssp-console-modes";
int baud, bits, stop, cflag;
char parity;
int carrier = 0;
int rtsdtr = 1;
int topnd, nd;
if (!serial_console)
return;
switch (serial_console) {
case PROMDEV_OTTYA:
mode_prop[3] = 'a';
cd_prop[3] = 'a';
dtr_prop[3] = 'a';
break;
case PROMDEV_OTTYB:
mode_prop[3] = 'b';
cd_prop[3] = 'b';
dtr_prop[3] = 'b';
break;
case PROMDEV_ORSC:
nd = prom_pathtoinode("rsc");
if (!nd) {
strcpy(mode, "115200,8,n,1,-");
goto no_options;
}
if (!prom_node_has_property(nd, ssp_console_modes_prop)) {
strcpy(mode, "115200,8,n,1,-");
goto no_options;
}
memset(mode, 0, sizeof(mode));
prom_getstring(nd, ssp_console_modes_prop, mode, sizeof(mode));
goto no_options;
default:
strcpy(mode, "9600,8,n,1,-");
goto no_options;
}
topnd = prom_getchild(prom_root_node);
nd = prom_searchsiblings(topnd, "options");
if (!nd) {
strcpy(mode, "9600,8,n,1,-");
goto no_options;
}
if (!prom_node_has_property(nd, mode_prop)) {
strcpy(mode, "9600,8,n,1,-");
goto no_options;
}
memset(mode, 0, sizeof(mode));
prom_getstring(nd, mode_prop, mode, sizeof(mode));
if (prom_node_has_property(nd, cd_prop)) {
memset(buf, 0, sizeof(buf));
prom_getstring(nd, cd_prop, buf, sizeof(buf));
if (!strcmp(buf, "false"))
carrier = 1;
/* XXX: this is unused below. */
}
if (prom_node_has_property(nd, dtr_prop)) {
memset(buf, 0, sizeof(buf));
prom_getstring(nd, dtr_prop, buf, sizeof(buf));
if (!strcmp(buf, "false"))
rtsdtr = 0;
/* XXX: this is unused below. */
}
no_options:
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;
}
EXPORT_SYMBOL(sunserial_console_termios);
/* 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;
}
static void __exit suncore_exit(void)
{
}
module_init(suncore_init);
module_exit(suncore_exit);
MODULE_AUTHOR("Eddie C. Dost, David S. Miller");
MODULE_DESCRIPTION("Sun serial common layer");
MODULE_LICENSE("GPL");
|
