11da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 21da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * USB Serial Console driver 31da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 41da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Copyright (C) 2001 - 2002 Greg Kroah-Hartman (greg@kroah.com) 51da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 61da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * This program is free software; you can redistribute it and/or 71da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * modify it under the terms of the GNU General Public License version 81da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 2 as published by the Free Software Foundation. 94dbd5a0961ff55cb8a7bce309dd5ef9b04090570Alan Cox * 101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Thanks to Randy Dunlap for the original version of this code. 111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/kernel.h> 151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/init.h> 161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/slab.h> 171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/tty.h> 181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/console.h> 197bd032dc2793afcbaf4a350056768da84cdbd89bAlan Stern#include <linux/serial.h> 201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/usb.h> 21a969888ce91673c7f4b86520d851a6f0d5a5fa7dGreg Kroah-Hartman#include <linux/usb/serial.h> 221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int debug; 241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstruct usbcons_info { 261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int magic; 271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int break_flag; 281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct usb_serial_port *port; 291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic struct usbcons_info usbcons_info; 321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic struct console usbcons; 331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * ------------------------------------------------------------ 361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * USB Serial console driver 371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Much of the code here is copied from drivers/char/serial.c 391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * and implements a phony serial console in the same way that 401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * serial.c does so that in case some software queries it, 411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * it will get the same results. 421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Things that are different from the way the serial port code 441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * does things, is that we call the lower level usb-serial 451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * driver code to initialize the device, and we set the initial 461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * console speeds based on the command line arguments. 471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * ------------------------------------------------------------ 481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * The parsing of the command line works exactly like the 531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * serial.c code, except that the specifier is "ttyUSB" instead 541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * of "ttyS". 551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 5669a4bf7c9525e5c92c0ecda0db0373f30162b28fPaul Fulghumstatic int usb_console_setup(struct console *co, char *options) 571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct usbcons_info *info = &usbcons_info; 591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int baud = 9600; 601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int bits = 8; 611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int parity = 'n'; 621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int doflow = 0; 631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int cflag = CREAD | HUPCL | CLOCAL; 641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds char *s; 651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct usb_serial *serial; 661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct usb_serial_port *port; 677bd032dc2793afcbaf4a350056768da84cdbd89bAlan Stern int retval; 68c87d6a4f67657f4f1b992eea43796c7e7c09fb17Aristeu Rozanski struct tty_struct *tty = NULL; 6992d2c5e4badc622999d3b17e6dfbf6babacb52f6Jason Wessel struct ktermios dummy; 701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 714dbd5a0961ff55cb8a7bce309dd5ef9b04090570Alan Cox dbg("%s", __func__); 721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (options) { 741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds baud = simple_strtoul(options, NULL, 10); 751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds s = options; 761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds while (*s >= '0' && *s <= '9') 771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds s++; 781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (*s) 791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds parity = *s++; 801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (*s) 811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bits = *s++ - '0'; 821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (*s) 831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds doflow = (*s++ == 'r'); 841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 85c17ee886976b64d29ea89ee5d87751438e26025bAlan Cox 86c17ee886976b64d29ea89ee5d87751438e26025bAlan Cox /* Sane default */ 87c17ee886976b64d29ea89ee5d87751438e26025bAlan Cox if (baud == 0) 88c17ee886976b64d29ea89ee5d87751438e26025bAlan Cox baud = 9600; 891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds switch (bits) { 914dbd5a0961ff55cb8a7bce309dd5ef9b04090570Alan Cox case 7: 924dbd5a0961ff55cb8a7bce309dd5ef9b04090570Alan Cox cflag |= CS7; 934dbd5a0961ff55cb8a7bce309dd5ef9b04090570Alan Cox break; 944dbd5a0961ff55cb8a7bce309dd5ef9b04090570Alan Cox default: 954dbd5a0961ff55cb8a7bce309dd5ef9b04090570Alan Cox case 8: 964dbd5a0961ff55cb8a7bce309dd5ef9b04090570Alan Cox cflag |= CS8; 974dbd5a0961ff55cb8a7bce309dd5ef9b04090570Alan Cox break; 981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds switch (parity) { 1004dbd5a0961ff55cb8a7bce309dd5ef9b04090570Alan Cox case 'o': case 'O': 1014dbd5a0961ff55cb8a7bce309dd5ef9b04090570Alan Cox cflag |= PARODD; 1024dbd5a0961ff55cb8a7bce309dd5ef9b04090570Alan Cox break; 1034dbd5a0961ff55cb8a7bce309dd5ef9b04090570Alan Cox case 'e': case 'E': 1044dbd5a0961ff55cb8a7bce309dd5ef9b04090570Alan Cox cflag |= PARENB; 1054dbd5a0961ff55cb8a7bce309dd5ef9b04090570Alan Cox break; 1061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 1071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds co->cflag = cflag; 1081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10927680d232b04d434d8d49a8417429b9512ffb7c6Aristeu Rozanski /* 11027680d232b04d434d8d49a8417429b9512ffb7c6Aristeu Rozanski * no need to check the index here: if the index is wrong, console 11127680d232b04d434d8d49a8417429b9512ffb7c6Aristeu Rozanski * code won't call us 11227680d232b04d434d8d49a8417429b9512ffb7c6Aristeu Rozanski */ 11327680d232b04d434d8d49a8417429b9512ffb7c6Aristeu Rozanski serial = usb_serial_get_by_index(co->index); 1141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (serial == NULL) { 1151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* no device is connected yet, sorry :( */ 1164dbd5a0961ff55cb8a7bce309dd5ef9b04090570Alan Cox err("No USB device connected to ttyUSB%i", co->index); 1171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -ENODEV; 1181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 1191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1207bd032dc2793afcbaf4a350056768da84cdbd89bAlan Stern retval = usb_autopm_get_interface(serial->interface); 1217bd032dc2793afcbaf4a350056768da84cdbd89bAlan Stern if (retval) 1227bd032dc2793afcbaf4a350056768da84cdbd89bAlan Stern goto error_get_interface; 1237bd032dc2793afcbaf4a350056768da84cdbd89bAlan Stern 1247bd032dc2793afcbaf4a350056768da84cdbd89bAlan Stern port = serial->port[co->index - serial->minor]; 1254a90f09b20f4622dcbff1f0e1e6bae1704f8ad8cAlan Cox tty_port_tty_set(&port->port, NULL); 1261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->port = port; 1284dbd5a0961ff55cb8a7bce309dd5ef9b04090570Alan Cox 12995da310e66ee8090119596c70ca8432e57f9a97fAlan Cox ++port->port.count; 1307bd032dc2793afcbaf4a350056768da84cdbd89bAlan Stern if (!test_bit(ASYNCB_INITIALIZED, &port->port.flags)) { 131c87d6a4f67657f4f1b992eea43796c7e7c09fb17Aristeu Rozanski if (serial->type->set_termios) { 132c87d6a4f67657f4f1b992eea43796c7e7c09fb17Aristeu Rozanski /* 133c87d6a4f67657f4f1b992eea43796c7e7c09fb17Aristeu Rozanski * allocate a fake tty so the driver can initialize 134c87d6a4f67657f4f1b992eea43796c7e7c09fb17Aristeu Rozanski * the termios structure, then later call set_termios to 135c87d6a4f67657f4f1b992eea43796c7e7c09fb17Aristeu Rozanski * configure according to command line arguments 136c87d6a4f67657f4f1b992eea43796c7e7c09fb17Aristeu Rozanski */ 137c87d6a4f67657f4f1b992eea43796c7e7c09fb17Aristeu Rozanski tty = kzalloc(sizeof(*tty), GFP_KERNEL); 138c87d6a4f67657f4f1b992eea43796c7e7c09fb17Aristeu Rozanski if (!tty) { 139c87d6a4f67657f4f1b992eea43796c7e7c09fb17Aristeu Rozanski retval = -ENOMEM; 140c87d6a4f67657f4f1b992eea43796c7e7c09fb17Aristeu Rozanski err("no more memory"); 141c87d6a4f67657f4f1b992eea43796c7e7c09fb17Aristeu Rozanski goto reset_open_count; 142c87d6a4f67657f4f1b992eea43796c7e7c09fb17Aristeu Rozanski } 143e5404586a499f7dce915456e85ff94b2df7a3b1cKevin Hao kref_init(&tty->kref); 14492d2c5e4badc622999d3b17e6dfbf6babacb52f6Jason Wessel tty_port_tty_set(&port->port, tty); 14592d2c5e4badc622999d3b17e6dfbf6babacb52f6Jason Wessel tty->driver = usb_serial_tty_driver; 14692d2c5e4badc622999d3b17e6dfbf6babacb52f6Jason Wessel tty->index = co->index; 14792d2c5e4badc622999d3b17e6dfbf6babacb52f6Jason Wessel if (tty_init_termios(tty)) { 148c87d6a4f67657f4f1b992eea43796c7e7c09fb17Aristeu Rozanski retval = -ENOMEM; 149c87d6a4f67657f4f1b992eea43796c7e7c09fb17Aristeu Rozanski err("no more memory"); 150c87d6a4f67657f4f1b992eea43796c7e7c09fb17Aristeu Rozanski goto free_tty; 151c87d6a4f67657f4f1b992eea43796c7e7c09fb17Aristeu Rozanski } 152c87d6a4f67657f4f1b992eea43796c7e7c09fb17Aristeu Rozanski } 153c87d6a4f67657f4f1b992eea43796c7e7c09fb17Aristeu Rozanski 1544dbd5a0961ff55cb8a7bce309dd5ef9b04090570Alan Cox /* only call the device specific open if this 1551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * is the first time the port is opened */ 1561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (serial->type->open) 157a509a7e478e4766114d69f12d19d644ac63e9765Alan Cox retval = serial->type->open(NULL, port); 1581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else 159a509a7e478e4766114d69f12d19d644ac63e9765Alan Cox retval = usb_serial_generic_open(NULL, port); 1601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 161c87d6a4f67657f4f1b992eea43796c7e7c09fb17Aristeu Rozanski if (retval) { 162c87d6a4f67657f4f1b992eea43796c7e7c09fb17Aristeu Rozanski err("could not open USB console port"); 16392d2c5e4badc622999d3b17e6dfbf6babacb52f6Jason Wessel goto fail; 1641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 165c87d6a4f67657f4f1b992eea43796c7e7c09fb17Aristeu Rozanski 166c87d6a4f67657f4f1b992eea43796c7e7c09fb17Aristeu Rozanski if (serial->type->set_termios) { 16792d2c5e4badc622999d3b17e6dfbf6babacb52f6Jason Wessel tty->termios->c_cflag = cflag; 16892d2c5e4badc622999d3b17e6dfbf6babacb52f6Jason Wessel tty_termios_encode_baud_rate(tty->termios, baud, baud); 16992d2c5e4badc622999d3b17e6dfbf6babacb52f6Jason Wessel memset(&dummy, 0, sizeof(struct ktermios)); 17006dd881f59b3c07a430cdcbef2197f9b6dc79ae8Jason Wessel serial->type->set_termios(tty, port, &dummy); 171c87d6a4f67657f4f1b992eea43796c7e7c09fb17Aristeu Rozanski 1724a90f09b20f4622dcbff1f0e1e6bae1704f8ad8cAlan Cox tty_port_tty_set(&port->port, NULL); 173c87d6a4f67657f4f1b992eea43796c7e7c09fb17Aristeu Rozanski kfree(tty); 1741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 1757bd032dc2793afcbaf4a350056768da84cdbd89bAlan Stern set_bit(ASYNCB_INITIALIZED, &port->port.flags); 1761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 1776e4061210150d1d6d388c5fba05f6b49a306a27eJason Wessel /* Now that any required fake tty operations are completed restore 1786e4061210150d1d6d388c5fba05f6b49a306a27eJason Wessel * the tty port count */ 1796e4061210150d1d6d388c5fba05f6b49a306a27eJason Wessel --port->port.count; 1806e4061210150d1d6d388c5fba05f6b49a306a27eJason Wessel /* The console is special in terms of closing the device so 1816e4061210150d1d6d388c5fba05f6b49a306a27eJason Wessel * indicate this port is now acting as a system console. */ 182336cee42dd52824e360ab419eab4e8888eb054ecJason Wessel port->port.console = 1; 1831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1847bd032dc2793afcbaf4a350056768da84cdbd89bAlan Stern mutex_unlock(&serial->disc_mutex); 185c87d6a4f67657f4f1b992eea43796c7e7c09fb17Aristeu Rozanski return retval; 1867bd032dc2793afcbaf4a350056768da84cdbd89bAlan Stern 18792d2c5e4badc622999d3b17e6dfbf6babacb52f6Jason Wessel fail: 1884a90f09b20f4622dcbff1f0e1e6bae1704f8ad8cAlan Cox tty_port_tty_set(&port->port, NULL); 1897bd032dc2793afcbaf4a350056768da84cdbd89bAlan Stern free_tty: 190c87d6a4f67657f4f1b992eea43796c7e7c09fb17Aristeu Rozanski kfree(tty); 1917bd032dc2793afcbaf4a350056768da84cdbd89bAlan Stern reset_open_count: 19295da310e66ee8090119596c70ca8432e57f9a97fAlan Cox port->port.count = 0; 1937bd032dc2793afcbaf4a350056768da84cdbd89bAlan Stern usb_autopm_put_interface(serial->interface); 1947bd032dc2793afcbaf4a350056768da84cdbd89bAlan Stern error_get_interface: 1957bd032dc2793afcbaf4a350056768da84cdbd89bAlan Stern usb_serial_put(serial); 1967bd032dc2793afcbaf4a350056768da84cdbd89bAlan Stern mutex_unlock(&serial->disc_mutex); 1977bd032dc2793afcbaf4a350056768da84cdbd89bAlan Stern return retval; 1981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 1991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2004dbd5a0961ff55cb8a7bce309dd5ef9b04090570Alan Coxstatic void usb_console_write(struct console *co, 2014dbd5a0961ff55cb8a7bce309dd5ef9b04090570Alan Cox const char *buf, unsigned count) 2021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 2031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds static struct usbcons_info *info = &usbcons_info; 2041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct usb_serial_port *port = info->port; 2051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct usb_serial *serial; 2061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int retval = -ENODEV; 2071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 20873e487fdb75f8abf230968dbf73a3dc3b16808d3Guennadi Liakhovetski if (!port || port->serial->dev->state == USB_STATE_NOTATTACHED) 2091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return; 2101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds serial = port->serial; 2111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (count == 0) 2131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return; 2141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 215441b62c1edb986827154768d89bbac0ba779984fHarvey Harrison dbg("%s - port %d, %d byte(s)", __func__, port->number, count); 2161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 217bd5afa9eac6daa408412a31a6c69e87e8bd28c7eJason Wessel if (!port->port.console) { 2184dbd5a0961ff55cb8a7bce309dd5ef9b04090570Alan Cox dbg("%s - port not opened", __func__); 219c10746dbb39d41e5fc27badfebe61448210c426dPaul Fulghum return; 2201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 2211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 222c10746dbb39d41e5fc27badfebe61448210c426dPaul Fulghum while (count) { 223c10746dbb39d41e5fc27badfebe61448210c426dPaul Fulghum unsigned int i; 224c10746dbb39d41e5fc27badfebe61448210c426dPaul Fulghum unsigned int lf; 225c10746dbb39d41e5fc27badfebe61448210c426dPaul Fulghum /* search for LF so we can insert CR if necessary */ 2264dbd5a0961ff55cb8a7bce309dd5ef9b04090570Alan Cox for (i = 0, lf = 0 ; i < count ; i++) { 227c10746dbb39d41e5fc27badfebe61448210c426dPaul Fulghum if (*(buf + i) == 10) { 228c10746dbb39d41e5fc27badfebe61448210c426dPaul Fulghum lf = 1; 229c10746dbb39d41e5fc27badfebe61448210c426dPaul Fulghum i++; 230c10746dbb39d41e5fc27badfebe61448210c426dPaul Fulghum break; 231c10746dbb39d41e5fc27badfebe61448210c426dPaul Fulghum } 232c10746dbb39d41e5fc27badfebe61448210c426dPaul Fulghum } 2334dbd5a0961ff55cb8a7bce309dd5ef9b04090570Alan Cox /* pass on to the driver specific version of this function if 2344dbd5a0961ff55cb8a7bce309dd5ef9b04090570Alan Cox it is available */ 235c10746dbb39d41e5fc27badfebe61448210c426dPaul Fulghum if (serial->type->write) 23695da310e66ee8090119596c70ca8432e57f9a97fAlan Cox retval = serial->type->write(NULL, port, buf, i); 237c10746dbb39d41e5fc27badfebe61448210c426dPaul Fulghum else 23895da310e66ee8090119596c70ca8432e57f9a97fAlan Cox retval = usb_serial_generic_write(NULL, port, buf, i); 239441b62c1edb986827154768d89bbac0ba779984fHarvey Harrison dbg("%s - return value : %d", __func__, retval); 240c10746dbb39d41e5fc27badfebe61448210c426dPaul Fulghum if (lf) { 241c10746dbb39d41e5fc27badfebe61448210c426dPaul Fulghum /* append CR after LF */ 242c10746dbb39d41e5fc27badfebe61448210c426dPaul Fulghum unsigned char cr = 13; 243c10746dbb39d41e5fc27badfebe61448210c426dPaul Fulghum if (serial->type->write) 2444dbd5a0961ff55cb8a7bce309dd5ef9b04090570Alan Cox retval = serial->type->write(NULL, 2454dbd5a0961ff55cb8a7bce309dd5ef9b04090570Alan Cox port, &cr, 1); 246c10746dbb39d41e5fc27badfebe61448210c426dPaul Fulghum else 2474dbd5a0961ff55cb8a7bce309dd5ef9b04090570Alan Cox retval = usb_serial_generic_write(NULL, 2484dbd5a0961ff55cb8a7bce309dd5ef9b04090570Alan Cox port, &cr, 1); 249441b62c1edb986827154768d89bbac0ba779984fHarvey Harrison dbg("%s - return value : %d", __func__, retval); 250c10746dbb39d41e5fc27badfebe61448210c426dPaul Fulghum } 251c10746dbb39d41e5fc27badfebe61448210c426dPaul Fulghum buf += i; 252c10746dbb39d41e5fc27badfebe61448210c426dPaul Fulghum count -= i; 253c10746dbb39d41e5fc27badfebe61448210c426dPaul Fulghum } 2541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 2551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 25639efd191d01b5f1efc3d604baf74233dc525e6a8Kevin Haostatic struct tty_driver *usb_console_device(struct console *co, int *index) 25739efd191d01b5f1efc3d604baf74233dc525e6a8Kevin Hao{ 25839efd191d01b5f1efc3d604baf74233dc525e6a8Kevin Hao struct tty_driver **p = (struct tty_driver **)co->data; 25939efd191d01b5f1efc3d604baf74233dc525e6a8Kevin Hao 26039efd191d01b5f1efc3d604baf74233dc525e6a8Kevin Hao if (!*p) 26139efd191d01b5f1efc3d604baf74233dc525e6a8Kevin Hao return NULL; 26239efd191d01b5f1efc3d604baf74233dc525e6a8Kevin Hao 26339efd191d01b5f1efc3d604baf74233dc525e6a8Kevin Hao *index = co->index; 26439efd191d01b5f1efc3d604baf74233dc525e6a8Kevin Hao return *p; 26539efd191d01b5f1efc3d604baf74233dc525e6a8Kevin Hao} 26639efd191d01b5f1efc3d604baf74233dc525e6a8Kevin Hao 2671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic struct console usbcons = { 2681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .name = "ttyUSB", 2691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .write = usb_console_write, 27039efd191d01b5f1efc3d604baf74233dc525e6a8Kevin Hao .device = usb_console_device, 2711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .setup = usb_console_setup, 2721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .flags = CON_PRINTBUFFER, 2731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .index = -1, 27439efd191d01b5f1efc3d604baf74233dc525e6a8Kevin Hao .data = &usb_serial_tty_driver, 2751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 2761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 27773e487fdb75f8abf230968dbf73a3dc3b16808d3Guennadi Liakhovetskivoid usb_serial_console_disconnect(struct usb_serial *serial) 27873e487fdb75f8abf230968dbf73a3dc3b16808d3Guennadi Liakhovetski{ 2794dbd5a0961ff55cb8a7bce309dd5ef9b04090570Alan Cox if (serial && serial->port && serial->port[0] 2804dbd5a0961ff55cb8a7bce309dd5ef9b04090570Alan Cox && serial->port[0] == usbcons_info.port) { 28173e487fdb75f8abf230968dbf73a3dc3b16808d3Guennadi Liakhovetski usb_serial_console_exit(); 28273e487fdb75f8abf230968dbf73a3dc3b16808d3Guennadi Liakhovetski usb_serial_put(serial); 28373e487fdb75f8abf230968dbf73a3dc3b16808d3Guennadi Liakhovetski } 28473e487fdb75f8abf230968dbf73a3dc3b16808d3Guennadi Liakhovetski} 28573e487fdb75f8abf230968dbf73a3dc3b16808d3Guennadi Liakhovetski 2864dbd5a0961ff55cb8a7bce309dd5ef9b04090570Alan Coxvoid usb_serial_console_init(int serial_debug, int minor) 2871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 2881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds debug = serial_debug; 2891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (minor == 0) { 2914dbd5a0961ff55cb8a7bce309dd5ef9b04090570Alan Cox /* 2921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Call register_console() if this is the first device plugged 2931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * in. If we call it earlier, then the callback to 2941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * console_setup() will fail, as there is not a device seen by 2951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * the USB subsystem yet. 2961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 2971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* 2981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Register console. 2991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * NOTES: 3004dbd5a0961ff55cb8a7bce309dd5ef9b04090570Alan Cox * console_setup() is called (back) immediately (from 3014dbd5a0961ff55cb8a7bce309dd5ef9b04090570Alan Cox * register_console). console_write() is called immediately 3024dbd5a0961ff55cb8a7bce309dd5ef9b04090570Alan Cox * from register_console iff CON_PRINTBUFFER is set in flags. 3031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 3044dbd5a0961ff55cb8a7bce309dd5ef9b04090570Alan Cox dbg("registering the USB serial console."); 3051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds register_console(&usbcons); 3061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 3071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 3081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3094dbd5a0961ff55cb8a7bce309dd5ef9b04090570Alan Coxvoid usb_serial_console_exit(void) 3101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 31173e487fdb75f8abf230968dbf73a3dc3b16808d3Guennadi Liakhovetski if (usbcons_info.port) { 31273e487fdb75f8abf230968dbf73a3dc3b16808d3Guennadi Liakhovetski unregister_console(&usbcons); 313bd5afa9eac6daa408412a31a6c69e87e8bd28c7eJason Wessel usbcons_info.port->port.console = 0; 31473e487fdb75f8abf230968dbf73a3dc3b16808d3Guennadi Liakhovetski usbcons_info.port = NULL; 31573e487fdb75f8abf230968dbf73a3dc3b16808d3Guennadi Liakhovetski } 3161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 3171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 318