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https://mirrors.bfsu.edu.cn/git/linux.git
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1da177e4c3
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
219 lines
4.5 KiB
C
219 lines
4.5 KiB
C
/* suncore.c
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*
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* Common SUN serial routines. Based entirely
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* upon drivers/sbus/char/sunserial.c which is:
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*
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* Copyright (C) 1997 Eddie C. Dost (ecd@skynet.be)
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*
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* Adaptation to new UART layer is:
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*
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* Copyright (C) 2002 David S. Miller (davem@redhat.com)
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*/
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#include <linux/config.h>
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/console.h>
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#include <linux/tty.h>
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#include <linux/errno.h>
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#include <linux/string.h>
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#include <linux/init.h>
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#include <asm/oplib.h>
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#include "suncore.h"
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int sunserial_current_minor = 64;
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EXPORT_SYMBOL(sunserial_current_minor);
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void
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sunserial_console_termios(struct console *con)
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{
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char mode[16], buf[16], *s;
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char *mode_prop = "ttyX-mode";
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char *cd_prop = "ttyX-ignore-cd";
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char *dtr_prop = "ttyX-rts-dtr-off";
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int baud, bits, stop, cflag;
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char parity;
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int carrier = 0;
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int rtsdtr = 1;
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int topnd, nd;
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if (!serial_console)
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return;
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if (serial_console == 1) {
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mode_prop[3] = 'a';
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cd_prop[3] = 'a';
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dtr_prop[3] = 'a';
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} else {
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mode_prop[3] = 'b';
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cd_prop[3] = 'b';
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dtr_prop[3] = 'b';
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}
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topnd = prom_getchild(prom_root_node);
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nd = prom_searchsiblings(topnd, "options");
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if (!nd) {
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strcpy(mode, "9600,8,n,1,-");
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goto no_options;
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}
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if (!prom_node_has_property(nd, mode_prop)) {
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strcpy(mode, "9600,8,n,1,-");
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goto no_options;
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}
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memset(mode, 0, sizeof(mode));
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prom_getstring(nd, mode_prop, mode, sizeof(mode));
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if (prom_node_has_property(nd, cd_prop)) {
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memset(buf, 0, sizeof(buf));
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prom_getstring(nd, cd_prop, buf, sizeof(buf));
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if (!strcmp(buf, "false"))
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carrier = 1;
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/* XXX: this is unused below. */
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}
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if (prom_node_has_property(nd, dtr_prop)) {
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memset(buf, 0, sizeof(buf));
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prom_getstring(nd, dtr_prop, buf, sizeof(buf));
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if (!strcmp(buf, "false"))
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rtsdtr = 0;
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/* XXX: this is unused below. */
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}
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no_options:
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cflag = CREAD | HUPCL | CLOCAL;
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s = mode;
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baud = simple_strtoul(s, NULL, 0);
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s = strchr(s, ',');
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bits = simple_strtoul(++s, NULL, 0);
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s = strchr(s, ',');
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parity = *(++s);
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s = strchr(s, ',');
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stop = simple_strtoul(++s, NULL, 0);
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s = strchr(s, ',');
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/* XXX handshake is not handled here. */
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switch (baud) {
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case 150: cflag |= B150; break;
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case 300: cflag |= B300; break;
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case 600: cflag |= B600; break;
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case 1200: cflag |= B1200; break;
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case 2400: cflag |= B2400; break;
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case 4800: cflag |= B4800; break;
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case 9600: cflag |= B9600; break;
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case 19200: cflag |= B19200; break;
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case 38400: cflag |= B38400; break;
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default: baud = 9600; cflag |= B9600; break;
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}
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switch (bits) {
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case 5: cflag |= CS5; break;
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case 6: cflag |= CS6; break;
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case 7: cflag |= CS7; break;
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case 8: cflag |= CS8; break;
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default: cflag |= CS8; break;
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}
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switch (parity) {
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case 'o': cflag |= (PARENB | PARODD); break;
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case 'e': cflag |= PARENB; break;
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case 'n': default: break;
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}
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switch (stop) {
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case 2: cflag |= CSTOPB; break;
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case 1: default: break;
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}
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con->cflag = cflag;
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}
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EXPORT_SYMBOL(sunserial_console_termios);
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/* Sun serial MOUSE auto baud rate detection. */
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static struct mouse_baud_cflag {
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int baud;
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unsigned int cflag;
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} mouse_baud_table[] = {
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{ 1200, B1200 },
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{ 2400, B2400 },
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{ 4800, B4800 },
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{ 9600, B9600 },
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{ -1, ~0 },
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{ -1, ~0 },
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};
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unsigned int suncore_mouse_baud_cflag_next(unsigned int cflag, int *new_baud)
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{
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int i;
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for (i = 0; mouse_baud_table[i].baud != -1; i++)
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if (mouse_baud_table[i].cflag == (cflag & CBAUD))
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break;
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i += 1;
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if (mouse_baud_table[i].baud == -1)
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i = 0;
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*new_baud = mouse_baud_table[i].baud;
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return mouse_baud_table[i].cflag;
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}
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EXPORT_SYMBOL(suncore_mouse_baud_cflag_next);
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/* Basically, when the baud rate is wrong the mouse spits out
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* breaks to us.
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*/
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int suncore_mouse_baud_detection(unsigned char ch, int is_break)
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{
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static int mouse_got_break = 0;
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static int ctr = 0;
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if (is_break) {
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/* Let a few normal bytes go by before we jump the gun
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* and say we need to try another baud rate.
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*/
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if (mouse_got_break && ctr < 8)
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return 1;
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/* Ok, we need to try another baud. */
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ctr = 0;
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mouse_got_break = 1;
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return 2;
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}
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if (mouse_got_break) {
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ctr++;
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if (ch == 0x87) {
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/* Correct baud rate determined. */
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mouse_got_break = 0;
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}
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return 1;
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}
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return 0;
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}
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EXPORT_SYMBOL(suncore_mouse_baud_detection);
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static int __init suncore_init(void)
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{
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return 0;
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}
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static void __exit suncore_exit(void)
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{
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}
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module_init(suncore_init);
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module_exit(suncore_exit);
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MODULE_AUTHOR("Eddie C. Dost, David S. Miller");
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MODULE_DESCRIPTION("Sun serial common layer");
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MODULE_LICENSE("GPL");
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