// SPDX-License-Identifier: GPL-2.0+ /* * MCT (Magic Control Technology Corp.) USB RS232 Converter Driver * * Copyright (C) 2000 Wolfgang Grandegger ([email protected]) * * This program is largely derived from the Belkin USB Serial Adapter Driver * (see belkin_sa.[ch]). All of the information about the device was acquired * by using SniffUSB on Windows98. For technical details see mct_u232.h. * * William G. Greathouse and Greg Kroah-Hartman provided great help on how to * do the reverse engineering and how to write a USB serial device driver. * * TO BE DONE, TO BE CHECKED: * DTR/RTS signal handling may be incomplete or incorrect. I have mainly * implemented what I have seen with SniffUSB or found in belkin_sa.c. * For further TODOs check also belkin_sa.c. */ #include <linux/kernel.h> #include <linux/errno.h> #include <linux/slab.h> #include <linux/tty.h> #include <linux/tty_driver.h> #include <linux/tty_flip.h> #include <linux/module.h> #include <linux/spinlock.h> #include <linux/uaccess.h> #include <asm/unaligned.h> #include <linux/usb.h> #include <linux/usb/serial.h> #include <linux/serial.h> #include "mct_u232.h" #define DRIVER_AUTHOR … #define DRIVER_DESC … /* * Function prototypes */ static int mct_u232_port_probe(struct usb_serial_port *port); static void mct_u232_port_remove(struct usb_serial_port *remove); static int mct_u232_open(struct tty_struct *tty, struct usb_serial_port *port); static void mct_u232_close(struct usb_serial_port *port); static void mct_u232_dtr_rts(struct usb_serial_port *port, int on); static void mct_u232_read_int_callback(struct urb *urb); static void mct_u232_set_termios(struct tty_struct *tty, struct usb_serial_port *port, const struct ktermios *old_termios); static int mct_u232_break_ctl(struct tty_struct *tty, int break_state); static int mct_u232_tiocmget(struct tty_struct *tty); static int mct_u232_tiocmset(struct tty_struct *tty, unsigned int set, unsigned int clear); static void mct_u232_throttle(struct tty_struct *tty); static void mct_u232_unthrottle(struct tty_struct *tty); /* * All of the device info needed for the MCT USB-RS232 converter. */ static const struct usb_device_id id_table[] = …; MODULE_DEVICE_TABLE(usb, id_table); static struct usb_serial_driver mct_u232_device = …; static struct usb_serial_driver * const serial_drivers[] = …; struct mct_u232_private { … }; #define THROTTLED … /* * Handle vendor specific USB requests */ #define WDR_TIMEOUT … /* * Later day 2.6.0-test kernels have new baud rates like B230400 which * we do not know how to support. We ignore them for the moment. */ static int mct_u232_calculate_baud_rate(struct usb_serial *serial, speed_t value, speed_t *result) { … } static int mct_u232_set_baud_rate(struct tty_struct *tty, struct usb_serial *serial, struct usb_serial_port *port, speed_t value) { … } /* mct_u232_set_baud_rate */ static int mct_u232_set_line_ctrl(struct usb_serial_port *port, unsigned char lcr) { … } /* mct_u232_set_line_ctrl */ static int mct_u232_set_modem_ctrl(struct usb_serial_port *port, unsigned int control_state) { … } /* mct_u232_set_modem_ctrl */ static int mct_u232_get_modem_stat(struct usb_serial_port *port, unsigned char *msr) { … } /* mct_u232_get_modem_stat */ static void mct_u232_msr_to_icount(struct async_icount *icount, unsigned char msr) { … } /* mct_u232_msr_to_icount */ static void mct_u232_msr_to_state(struct usb_serial_port *port, unsigned int *control_state, unsigned char msr) { … } /* mct_u232_msr_to_state */ /* * Driver's tty interface functions */ static int mct_u232_port_probe(struct usb_serial_port *port) { … } static void mct_u232_port_remove(struct usb_serial_port *port) { … } static int mct_u232_open(struct tty_struct *tty, struct usb_serial_port *port) { … } /* mct_u232_open */ static void mct_u232_dtr_rts(struct usb_serial_port *port, int on) { … } static void mct_u232_close(struct usb_serial_port *port) { … } /* mct_u232_close */ static void mct_u232_read_int_callback(struct urb *urb) { … } /* mct_u232_read_int_callback */ static void mct_u232_set_termios(struct tty_struct *tty, struct usb_serial_port *port, const struct ktermios *old_termios) { … } /* mct_u232_set_termios */ static int mct_u232_break_ctl(struct tty_struct *tty, int break_state) { … } /* mct_u232_break_ctl */ static int mct_u232_tiocmget(struct tty_struct *tty) { … } static int mct_u232_tiocmset(struct tty_struct *tty, unsigned int set, unsigned int clear) { … } static void mct_u232_throttle(struct tty_struct *tty) { … } static void mct_u232_unthrottle(struct tty_struct *tty) { … } module_usb_serial_driver(…); MODULE_AUTHOR(…); MODULE_DESCRIPTION(…); MODULE_LICENSE(…) …;
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