/* 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/init.h> #include <asm/prom.h> #include "suncore.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) { int off; if (!con || of_console_device != dp) return 0; off = 0; if (of_console_options && *of_console_options == 'b') off = 1; if ((line & 1) != off) return 0; con->index = line; drv->cons = con; add_preferred_console(con->name, line, NULL); return 1; } EXPORT_SYMBOL(sunserial_console_match); void sunserial_console_termios(struct console *con) { struct device_node *dp; const char *od, *mode, *s; char mode_prop[] = "ttyX-mode"; int baud, bits, stop, cflag; char parity; dp = of_find_node_by_path("/options"); od = of_get_property(dp, "output-device", NULL); if (!strcmp(od, "rsc")) { mode = of_get_property(of_console_device, "ssp-console-modes", NULL); if (!mode) mode = "115200,8,n,1,-"; } else { char c; c = 'a'; if (of_console_options) c = *of_console_options; mode_prop[3] = c; 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");