--- /dev/null
+/* 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/module.h>
+#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;
+}
+
+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");
Code Review / kvmfornfv.git / blobdiff