forked from Minki/linux
2f007de2f4
we report errors to the caller. THis patch adds error handling to the driver. Signed-off-by: Oliver Neukum <oneukum@suse.de> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
785 lines
23 KiB
C
785 lines
23 KiB
C
/*
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* MCT (Magic Control Technology Corp.) USB RS232 Converter Driver
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*
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* Copyright (C) 2000 Wolfgang Grandegger (wolfgang@ces.ch)
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is largely derived from the Belkin USB Serial Adapter Driver
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* (see belkin_sa.[ch]). All of the information about the device was acquired
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* by using SniffUSB on Windows98. For technical details see mct_u232.h.
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*
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* William G. Greathouse and Greg Kroah-Hartman provided great help on how to
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* do the reverse engineering and how to write a USB serial device driver.
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*
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* TO BE DONE, TO BE CHECKED:
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* DTR/RTS signal handling may be incomplete or incorrect. I have mainly
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* implemented what I have seen with SniffUSB or found in belkin_sa.c.
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* For further TODOs check also belkin_sa.c.
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*
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* TEST STATUS:
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* Basic tests have been performed with minicom/zmodem transfers and
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* modem dialing under Linux 2.4.0-test10 (for me it works fine).
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*
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* 04-Nov-2003 Bill Marr <marr at flex dot com>
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* - Mimic Windows driver by sending 2 USB 'device request' messages
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* following normal 'baud rate change' message. This allows data to be
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* transmitted to RS-232 devices which don't assert the 'CTS' signal.
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*
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* 10-Nov-2001 Wolfgang Grandegger
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* - Fixed an endianess problem with the baudrate selection for PowerPC.
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*
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* 06-Dec-2001 Martin Hamilton <martinh@gnu.org>
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* Added support for the Belkin F5U109 DB9 adaptor
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*
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* 30-May-2001 Greg Kroah-Hartman
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* switched from using spinlock to a semaphore, which fixes lots of problems.
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*
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* 04-May-2001 Stelian Pop
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* - Set the maximum bulk output size for Sitecom U232-P25 model to 16 bytes
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* instead of the device reported 32 (using 32 bytes causes many data
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* loss, Windows driver uses 16 too).
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*
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* 02-May-2001 Stelian Pop
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* - Fixed the baud calculation for Sitecom U232-P25 model
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*
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* 08-Apr-2001 gb
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* - Identify version on module load.
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*
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* 06-Jan-2001 Cornel Ciocirlan
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* - Added support for Sitecom U232-P25 model (Product Id 0x0230)
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* - Added support for D-Link DU-H3SP USB BAY (Product Id 0x0200)
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*
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* 29-Nov-2000 Greg Kroah-Hartman
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* - Added device id table to fit with 2.4.0-test11 structure.
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* - took out DEAL_WITH_TWO_INT_IN_ENDPOINTS #define as it's not needed
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* (lots of things will change if/when the usb-serial core changes to
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* handle these issues.
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*
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* 27-Nov-2000 Wolfgang Grandegger
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* A version for kernel 2.4.0-test10 released to the Linux community
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* (via linux-usb-devel).
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*/
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#include <linux/kernel.h>
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#include <linux/errno.h>
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#include <linux/init.h>
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#include <linux/slab.h>
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#include <linux/tty.h>
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#include <linux/tty_driver.h>
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#include <linux/tty_flip.h>
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#include <linux/module.h>
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#include <linux/spinlock.h>
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#include <asm/uaccess.h>
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#include <linux/usb.h>
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#include <linux/usb/serial.h>
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#include "mct_u232.h"
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/*
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* Version Information
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*/
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#define DRIVER_VERSION "z2.0" /* Linux in-kernel version */
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#define DRIVER_AUTHOR "Wolfgang Grandegger <wolfgang@ces.ch>"
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#define DRIVER_DESC "Magic Control Technology USB-RS232 converter driver"
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static int debug;
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/*
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* Function prototypes
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*/
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static int mct_u232_startup (struct usb_serial *serial);
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static void mct_u232_shutdown (struct usb_serial *serial);
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static int mct_u232_open (struct usb_serial_port *port,
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struct file *filp);
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static void mct_u232_close (struct usb_serial_port *port,
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struct file *filp);
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static void mct_u232_read_int_callback (struct urb *urb);
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static void mct_u232_set_termios (struct usb_serial_port *port,
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struct ktermios * old);
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static int mct_u232_ioctl (struct usb_serial_port *port,
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struct file * file,
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unsigned int cmd,
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unsigned long arg);
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static void mct_u232_break_ctl (struct usb_serial_port *port,
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int break_state );
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static int mct_u232_tiocmget (struct usb_serial_port *port,
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struct file *file);
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static int mct_u232_tiocmset (struct usb_serial_port *port,
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struct file *file, unsigned int set,
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unsigned int clear);
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/*
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* All of the device info needed for the MCT USB-RS232 converter.
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*/
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static struct usb_device_id id_table_combined [] = {
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{ USB_DEVICE(MCT_U232_VID, MCT_U232_PID) },
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{ USB_DEVICE(MCT_U232_VID, MCT_U232_SITECOM_PID) },
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{ USB_DEVICE(MCT_U232_VID, MCT_U232_DU_H3SP_PID) },
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{ USB_DEVICE(MCT_U232_BELKIN_F5U109_VID, MCT_U232_BELKIN_F5U109_PID) },
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{ } /* Terminating entry */
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};
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MODULE_DEVICE_TABLE (usb, id_table_combined);
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static struct usb_driver mct_u232_driver = {
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.name = "mct_u232",
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.probe = usb_serial_probe,
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.disconnect = usb_serial_disconnect,
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.id_table = id_table_combined,
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.no_dynamic_id = 1,
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};
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static struct usb_serial_driver mct_u232_device = {
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.driver = {
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.owner = THIS_MODULE,
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.name = "mct_u232",
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},
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.description = "MCT U232",
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.usb_driver = &mct_u232_driver,
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.id_table = id_table_combined,
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.num_interrupt_in = 2,
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.num_bulk_in = 0,
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.num_bulk_out = 1,
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.num_ports = 1,
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.open = mct_u232_open,
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.close = mct_u232_close,
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.read_int_callback = mct_u232_read_int_callback,
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.ioctl = mct_u232_ioctl,
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.set_termios = mct_u232_set_termios,
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.break_ctl = mct_u232_break_ctl,
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.tiocmget = mct_u232_tiocmget,
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.tiocmset = mct_u232_tiocmset,
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.attach = mct_u232_startup,
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.shutdown = mct_u232_shutdown,
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};
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struct mct_u232_private {
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spinlock_t lock;
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unsigned int control_state; /* Modem Line Setting (TIOCM) */
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unsigned char last_lcr; /* Line Control Register */
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unsigned char last_lsr; /* Line Status Register */
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unsigned char last_msr; /* Modem Status Register */
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};
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/*
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* Handle vendor specific USB requests
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*/
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#define WDR_TIMEOUT 5000 /* default urb timeout */
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/*
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* Later day 2.6.0-test kernels have new baud rates like B230400 which
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* we do not know how to support. We ignore them for the moment.
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* XXX Rate-limit the error message, it's user triggerable.
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*/
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static int mct_u232_calculate_baud_rate(struct usb_serial *serial, int value)
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{
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if (le16_to_cpu(serial->dev->descriptor.idProduct) == MCT_U232_SITECOM_PID
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|| le16_to_cpu(serial->dev->descriptor.idProduct) == MCT_U232_BELKIN_F5U109_PID) {
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switch (value) {
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case B300: return 0x01;
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case B600: return 0x02; /* this one not tested */
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case B1200: return 0x03;
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case B2400: return 0x04;
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case B4800: return 0x06;
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case B9600: return 0x08;
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case B19200: return 0x09;
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case B38400: return 0x0a;
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case B57600: return 0x0b;
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case B115200: return 0x0c;
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default:
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err("MCT USB-RS232: unsupported baudrate request 0x%x,"
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" using default of B9600", value);
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return 0x08;
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}
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} else {
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switch (value) {
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case B300: value = 300; break;
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case B600: value = 600; break;
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case B1200: value = 1200; break;
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case B2400: value = 2400; break;
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case B4800: value = 4800; break;
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case B9600: value = 9600; break;
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case B19200: value = 19200; break;
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case B38400: value = 38400; break;
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case B57600: value = 57600; break;
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case B115200: value = 115200; break;
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default:
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err("MCT USB-RS232: unsupported baudrate request 0x%x,"
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" using default of B9600", value);
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value = 9600;
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}
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return 115200/value;
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}
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}
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static int mct_u232_set_baud_rate(struct usb_serial *serial, int value)
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{
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__le32 divisor;
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int rc;
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unsigned char zero_byte = 0;
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divisor = cpu_to_le32(mct_u232_calculate_baud_rate(serial, value));
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rc = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
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MCT_U232_SET_BAUD_RATE_REQUEST,
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MCT_U232_SET_REQUEST_TYPE,
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0, 0, &divisor, MCT_U232_SET_BAUD_RATE_SIZE,
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WDR_TIMEOUT);
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if (rc < 0)
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err("Set BAUD RATE %d failed (error = %d)", value, rc);
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dbg("set_baud_rate: value: 0x%x, divisor: 0x%x", value, divisor);
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/* Mimic the MCT-supplied Windows driver (version 1.21P.0104), which
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always sends two extra USB 'device request' messages after the
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'baud rate change' message. The actual functionality of the
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request codes in these messages is not fully understood but these
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particular codes are never seen in any operation besides a baud
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rate change. Both of these messages send a single byte of data
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whose value is always zero. The second of these two extra messages
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is required in order for data to be properly written to an RS-232
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device which does not assert the 'CTS' signal. */
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rc = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
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MCT_U232_SET_UNKNOWN1_REQUEST,
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MCT_U232_SET_REQUEST_TYPE,
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0, 0, &zero_byte, MCT_U232_SET_UNKNOWN1_SIZE,
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WDR_TIMEOUT);
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if (rc < 0)
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err("Sending USB device request code %d failed (error = %d)",
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MCT_U232_SET_UNKNOWN1_REQUEST, rc);
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rc = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
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MCT_U232_SET_UNKNOWN2_REQUEST,
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MCT_U232_SET_REQUEST_TYPE,
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0, 0, &zero_byte, MCT_U232_SET_UNKNOWN2_SIZE,
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WDR_TIMEOUT);
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if (rc < 0)
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err("Sending USB device request code %d failed (error = %d)",
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MCT_U232_SET_UNKNOWN2_REQUEST, rc);
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return rc;
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} /* mct_u232_set_baud_rate */
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static int mct_u232_set_line_ctrl(struct usb_serial *serial, unsigned char lcr)
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{
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int rc;
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rc = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
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MCT_U232_SET_LINE_CTRL_REQUEST,
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MCT_U232_SET_REQUEST_TYPE,
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0, 0, &lcr, MCT_U232_SET_LINE_CTRL_SIZE,
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WDR_TIMEOUT);
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if (rc < 0)
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err("Set LINE CTRL 0x%x failed (error = %d)", lcr, rc);
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dbg("set_line_ctrl: 0x%x", lcr);
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return rc;
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} /* mct_u232_set_line_ctrl */
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static int mct_u232_set_modem_ctrl(struct usb_serial *serial,
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unsigned int control_state)
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{
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int rc;
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unsigned char mcr = MCT_U232_MCR_NONE;
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if (control_state & TIOCM_DTR)
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mcr |= MCT_U232_MCR_DTR;
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if (control_state & TIOCM_RTS)
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mcr |= MCT_U232_MCR_RTS;
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rc = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
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MCT_U232_SET_MODEM_CTRL_REQUEST,
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MCT_U232_SET_REQUEST_TYPE,
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0, 0, &mcr, MCT_U232_SET_MODEM_CTRL_SIZE,
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WDR_TIMEOUT);
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if (rc < 0)
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err("Set MODEM CTRL 0x%x failed (error = %d)", mcr, rc);
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dbg("set_modem_ctrl: state=0x%x ==> mcr=0x%x", control_state, mcr);
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return rc;
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} /* mct_u232_set_modem_ctrl */
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static int mct_u232_get_modem_stat(struct usb_serial *serial, unsigned char *msr)
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{
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int rc;
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rc = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
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MCT_U232_GET_MODEM_STAT_REQUEST,
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MCT_U232_GET_REQUEST_TYPE,
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0, 0, msr, MCT_U232_GET_MODEM_STAT_SIZE,
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WDR_TIMEOUT);
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if (rc < 0) {
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err("Get MODEM STATus failed (error = %d)", rc);
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*msr = 0;
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}
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dbg("get_modem_stat: 0x%x", *msr);
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return rc;
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} /* mct_u232_get_modem_stat */
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static void mct_u232_msr_to_state(unsigned int *control_state, unsigned char msr)
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{
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/* Translate Control Line states */
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if (msr & MCT_U232_MSR_DSR)
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*control_state |= TIOCM_DSR;
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else
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*control_state &= ~TIOCM_DSR;
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if (msr & MCT_U232_MSR_CTS)
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*control_state |= TIOCM_CTS;
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else
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*control_state &= ~TIOCM_CTS;
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if (msr & MCT_U232_MSR_RI)
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*control_state |= TIOCM_RI;
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else
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*control_state &= ~TIOCM_RI;
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if (msr & MCT_U232_MSR_CD)
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*control_state |= TIOCM_CD;
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else
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*control_state &= ~TIOCM_CD;
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dbg("msr_to_state: msr=0x%x ==> state=0x%x", msr, *control_state);
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} /* mct_u232_msr_to_state */
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/*
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* Driver's tty interface functions
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*/
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static int mct_u232_startup (struct usb_serial *serial)
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{
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struct mct_u232_private *priv;
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struct usb_serial_port *port, *rport;
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priv = kzalloc(sizeof(struct mct_u232_private), GFP_KERNEL);
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if (!priv)
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return -ENOMEM;
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spin_lock_init(&priv->lock);
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usb_set_serial_port_data(serial->port[0], priv);
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init_waitqueue_head(&serial->port[0]->write_wait);
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/* Puh, that's dirty */
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port = serial->port[0];
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rport = serial->port[1];
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/* No unlinking, it wasn't submitted yet. */
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usb_free_urb(port->read_urb);
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port->read_urb = rport->interrupt_in_urb;
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rport->interrupt_in_urb = NULL;
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port->read_urb->context = port;
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return (0);
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} /* mct_u232_startup */
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static void mct_u232_shutdown (struct usb_serial *serial)
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{
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struct mct_u232_private *priv;
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int i;
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dbg("%s", __FUNCTION__);
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for (i=0; i < serial->num_ports; ++i) {
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/* My special items, the standard routines free my urbs */
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priv = usb_get_serial_port_data(serial->port[i]);
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if (priv) {
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usb_set_serial_port_data(serial->port[i], NULL);
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kfree(priv);
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}
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}
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} /* mct_u232_shutdown */
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static int mct_u232_open (struct usb_serial_port *port, struct file *filp)
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{
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struct usb_serial *serial = port->serial;
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struct mct_u232_private *priv = usb_get_serial_port_data(port);
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int retval = 0;
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unsigned int control_state;
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unsigned long flags;
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unsigned char last_lcr;
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unsigned char last_msr;
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dbg("%s port %d", __FUNCTION__, port->number);
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/* Compensate for a hardware bug: although the Sitecom U232-P25
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* device reports a maximum output packet size of 32 bytes,
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* it seems to be able to accept only 16 bytes (and that's what
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* SniffUSB says too...)
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*/
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if (le16_to_cpu(serial->dev->descriptor.idProduct) == MCT_U232_SITECOM_PID)
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port->bulk_out_size = 16;
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/* Do a defined restart: the normal serial device seems to
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* always turn on DTR and RTS here, so do the same. I'm not
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* sure if this is really necessary. But it should not harm
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* either.
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*/
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spin_lock_irqsave(&priv->lock, flags);
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if (port->tty->termios->c_cflag & CBAUD)
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priv->control_state = TIOCM_DTR | TIOCM_RTS;
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else
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priv->control_state = 0;
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priv->last_lcr = (MCT_U232_DATA_BITS_8 |
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MCT_U232_PARITY_NONE |
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MCT_U232_STOP_BITS_1);
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control_state = priv->control_state;
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last_lcr = priv->last_lcr;
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spin_unlock_irqrestore(&priv->lock, flags);
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mct_u232_set_modem_ctrl(serial, control_state);
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mct_u232_set_line_ctrl(serial, last_lcr);
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/* Read modem status and update control state */
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mct_u232_get_modem_stat(serial, &last_msr);
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spin_lock_irqsave(&priv->lock, flags);
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priv->last_msr = last_msr;
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mct_u232_msr_to_state(&priv->control_state, priv->last_msr);
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spin_unlock_irqrestore(&priv->lock, flags);
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port->read_urb->dev = port->serial->dev;
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retval = usb_submit_urb(port->read_urb, GFP_KERNEL);
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if (retval) {
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err("usb_submit_urb(read bulk) failed pipe 0x%x err %d",
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port->read_urb->pipe, retval);
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goto error;
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}
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|
|
port->interrupt_in_urb->dev = port->serial->dev;
|
|
retval = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL);
|
|
if (retval) {
|
|
usb_kill_urb(port->read_urb);
|
|
err(" usb_submit_urb(read int) failed pipe 0x%x err %d",
|
|
port->interrupt_in_urb->pipe, retval);
|
|
goto error;
|
|
}
|
|
return 0;
|
|
|
|
error:
|
|
return retval;
|
|
} /* mct_u232_open */
|
|
|
|
|
|
static void mct_u232_close (struct usb_serial_port *port, struct file *filp)
|
|
{
|
|
dbg("%s port %d", __FUNCTION__, port->number);
|
|
|
|
if (port->serial->dev) {
|
|
/* shutdown our urbs */
|
|
usb_kill_urb(port->write_urb);
|
|
usb_kill_urb(port->read_urb);
|
|
usb_kill_urb(port->interrupt_in_urb);
|
|
}
|
|
} /* mct_u232_close */
|
|
|
|
|
|
static void mct_u232_read_int_callback (struct urb *urb)
|
|
{
|
|
struct usb_serial_port *port = (struct usb_serial_port *)urb->context;
|
|
struct mct_u232_private *priv = usb_get_serial_port_data(port);
|
|
struct usb_serial *serial = port->serial;
|
|
struct tty_struct *tty;
|
|
unsigned char *data = urb->transfer_buffer;
|
|
int status;
|
|
unsigned long flags;
|
|
|
|
switch (urb->status) {
|
|
case 0:
|
|
/* success */
|
|
break;
|
|
case -ECONNRESET:
|
|
case -ENOENT:
|
|
case -ESHUTDOWN:
|
|
/* this urb is terminated, clean up */
|
|
dbg("%s - urb shutting down with status: %d", __FUNCTION__, urb->status);
|
|
return;
|
|
default:
|
|
dbg("%s - nonzero urb status received: %d", __FUNCTION__, urb->status);
|
|
goto exit;
|
|
}
|
|
|
|
if (!serial) {
|
|
dbg("%s - bad serial pointer, exiting", __FUNCTION__);
|
|
return;
|
|
}
|
|
|
|
dbg("%s - port %d", __FUNCTION__, port->number);
|
|
usb_serial_debug_data(debug, &port->dev, __FUNCTION__, urb->actual_length, data);
|
|
|
|
/*
|
|
* Work-a-round: handle the 'usual' bulk-in pipe here
|
|
*/
|
|
if (urb->transfer_buffer_length > 2) {
|
|
int i;
|
|
tty = port->tty;
|
|
if (urb->actual_length) {
|
|
for (i = 0; i < urb->actual_length ; ++i) {
|
|
tty_insert_flip_char(tty, data[i], 0);
|
|
}
|
|
tty_flip_buffer_push(tty);
|
|
}
|
|
goto exit;
|
|
}
|
|
|
|
/*
|
|
* The interrupt-in pipe signals exceptional conditions (modem line
|
|
* signal changes and errors). data[0] holds MSR, data[1] holds LSR.
|
|
*/
|
|
spin_lock_irqsave(&priv->lock, flags);
|
|
priv->last_msr = data[MCT_U232_MSR_INDEX];
|
|
|
|
/* Record Control Line states */
|
|
mct_u232_msr_to_state(&priv->control_state, priv->last_msr);
|
|
|
|
#if 0
|
|
/* Not yet handled. See belin_sa.c for further information */
|
|
/* Now to report any errors */
|
|
priv->last_lsr = data[MCT_U232_LSR_INDEX];
|
|
/*
|
|
* fill in the flip buffer here, but I do not know the relation
|
|
* to the current/next receive buffer or characters. I need
|
|
* to look in to this before committing any code.
|
|
*/
|
|
if (priv->last_lsr & MCT_U232_LSR_ERR) {
|
|
tty = port->tty;
|
|
/* Overrun Error */
|
|
if (priv->last_lsr & MCT_U232_LSR_OE) {
|
|
}
|
|
/* Parity Error */
|
|
if (priv->last_lsr & MCT_U232_LSR_PE) {
|
|
}
|
|
/* Framing Error */
|
|
if (priv->last_lsr & MCT_U232_LSR_FE) {
|
|
}
|
|
/* Break Indicator */
|
|
if (priv->last_lsr & MCT_U232_LSR_BI) {
|
|
}
|
|
}
|
|
#endif
|
|
spin_unlock_irqrestore(&priv->lock, flags);
|
|
exit:
|
|
status = usb_submit_urb (urb, GFP_ATOMIC);
|
|
if (status)
|
|
err ("%s - usb_submit_urb failed with result %d",
|
|
__FUNCTION__, status);
|
|
} /* mct_u232_read_int_callback */
|
|
|
|
static void mct_u232_set_termios (struct usb_serial_port *port,
|
|
struct ktermios *old_termios)
|
|
{
|
|
struct usb_serial *serial = port->serial;
|
|
struct mct_u232_private *priv = usb_get_serial_port_data(port);
|
|
unsigned int iflag = port->tty->termios->c_iflag;
|
|
unsigned int cflag = port->tty->termios->c_cflag;
|
|
unsigned int old_cflag = old_termios->c_cflag;
|
|
unsigned long flags;
|
|
unsigned int control_state, new_state;
|
|
unsigned char last_lcr;
|
|
|
|
/* get a local copy of the current port settings */
|
|
spin_lock_irqsave(&priv->lock, flags);
|
|
control_state = priv->control_state;
|
|
spin_unlock_irqrestore(&priv->lock, flags);
|
|
last_lcr = 0;
|
|
|
|
/*
|
|
* Update baud rate.
|
|
* Do not attempt to cache old rates and skip settings,
|
|
* disconnects screw such tricks up completely.
|
|
* Premature optimization is the root of all evil.
|
|
*/
|
|
|
|
/* reassert DTR and (maybe) RTS on transition from B0 */
|
|
if ((old_cflag & CBAUD) == B0) {
|
|
dbg("%s: baud was B0", __FUNCTION__);
|
|
control_state |= TIOCM_DTR;
|
|
/* don't set RTS if using hardware flow control */
|
|
if (!(old_cflag & CRTSCTS)) {
|
|
control_state |= TIOCM_RTS;
|
|
}
|
|
mct_u232_set_modem_ctrl(serial, control_state);
|
|
}
|
|
|
|
mct_u232_set_baud_rate(serial, cflag & CBAUD);
|
|
|
|
if ((cflag & CBAUD) == B0 ) {
|
|
dbg("%s: baud is B0", __FUNCTION__);
|
|
/* Drop RTS and DTR */
|
|
control_state &= ~(TIOCM_DTR | TIOCM_RTS);
|
|
mct_u232_set_modem_ctrl(serial, control_state);
|
|
}
|
|
|
|
/*
|
|
* Update line control register (LCR)
|
|
*/
|
|
|
|
/* set the parity */
|
|
if (cflag & PARENB)
|
|
last_lcr |= (cflag & PARODD) ?
|
|
MCT_U232_PARITY_ODD : MCT_U232_PARITY_EVEN;
|
|
else
|
|
last_lcr |= MCT_U232_PARITY_NONE;
|
|
|
|
/* set the number of data bits */
|
|
switch (cflag & CSIZE) {
|
|
case CS5:
|
|
last_lcr |= MCT_U232_DATA_BITS_5; break;
|
|
case CS6:
|
|
last_lcr |= MCT_U232_DATA_BITS_6; break;
|
|
case CS7:
|
|
last_lcr |= MCT_U232_DATA_BITS_7; break;
|
|
case CS8:
|
|
last_lcr |= MCT_U232_DATA_BITS_8; break;
|
|
default:
|
|
err("CSIZE was not CS5-CS8, using default of 8");
|
|
last_lcr |= MCT_U232_DATA_BITS_8;
|
|
break;
|
|
}
|
|
|
|
/* set the number of stop bits */
|
|
last_lcr |= (cflag & CSTOPB) ?
|
|
MCT_U232_STOP_BITS_2 : MCT_U232_STOP_BITS_1;
|
|
|
|
mct_u232_set_line_ctrl(serial, last_lcr);
|
|
|
|
/*
|
|
* Set flow control: well, I do not really now how to handle DTR/RTS.
|
|
* Just do what we have seen with SniffUSB on Win98.
|
|
*/
|
|
/* Drop DTR/RTS if no flow control otherwise assert */
|
|
new_state = control_state;
|
|
if ((iflag & IXOFF) || (iflag & IXON) || (cflag & CRTSCTS))
|
|
new_state |= TIOCM_DTR | TIOCM_RTS;
|
|
else
|
|
new_state &= ~(TIOCM_DTR | TIOCM_RTS);
|
|
if (new_state != control_state) {
|
|
mct_u232_set_modem_ctrl(serial, new_state);
|
|
control_state = new_state;
|
|
}
|
|
|
|
/* save off the modified port settings */
|
|
spin_lock_irqsave(&priv->lock, flags);
|
|
priv->control_state = control_state;
|
|
priv->last_lcr = last_lcr;
|
|
spin_unlock_irqrestore(&priv->lock, flags);
|
|
} /* mct_u232_set_termios */
|
|
|
|
static void mct_u232_break_ctl( struct usb_serial_port *port, int break_state )
|
|
{
|
|
struct usb_serial *serial = port->serial;
|
|
struct mct_u232_private *priv = usb_get_serial_port_data(port);
|
|
unsigned char lcr;
|
|
unsigned long flags;
|
|
|
|
dbg("%sstate=%d", __FUNCTION__, break_state);
|
|
|
|
spin_lock_irqsave(&priv->lock, flags);
|
|
lcr = priv->last_lcr;
|
|
spin_unlock_irqrestore(&priv->lock, flags);
|
|
|
|
if (break_state)
|
|
lcr |= MCT_U232_SET_BREAK;
|
|
|
|
mct_u232_set_line_ctrl(serial, lcr);
|
|
} /* mct_u232_break_ctl */
|
|
|
|
|
|
static int mct_u232_tiocmget (struct usb_serial_port *port, struct file *file)
|
|
{
|
|
struct mct_u232_private *priv = usb_get_serial_port_data(port);
|
|
unsigned int control_state;
|
|
unsigned long flags;
|
|
|
|
dbg("%s", __FUNCTION__);
|
|
|
|
spin_lock_irqsave(&priv->lock, flags);
|
|
control_state = priv->control_state;
|
|
spin_unlock_irqrestore(&priv->lock, flags);
|
|
|
|
return control_state;
|
|
}
|
|
|
|
static int mct_u232_tiocmset (struct usb_serial_port *port, struct file *file,
|
|
unsigned int set, unsigned int clear)
|
|
{
|
|
struct usb_serial *serial = port->serial;
|
|
struct mct_u232_private *priv = usb_get_serial_port_data(port);
|
|
unsigned int control_state;
|
|
unsigned long flags;
|
|
|
|
dbg("%s", __FUNCTION__);
|
|
|
|
spin_lock_irqsave(&priv->lock, flags);
|
|
control_state = priv->control_state;
|
|
|
|
if (set & TIOCM_RTS)
|
|
control_state |= TIOCM_RTS;
|
|
if (set & TIOCM_DTR)
|
|
control_state |= TIOCM_DTR;
|
|
if (clear & TIOCM_RTS)
|
|
control_state &= ~TIOCM_RTS;
|
|
if (clear & TIOCM_DTR)
|
|
control_state &= ~TIOCM_DTR;
|
|
|
|
priv->control_state = control_state;
|
|
spin_unlock_irqrestore(&priv->lock, flags);
|
|
return mct_u232_set_modem_ctrl(serial, control_state);
|
|
}
|
|
|
|
static int mct_u232_ioctl (struct usb_serial_port *port, struct file * file,
|
|
unsigned int cmd, unsigned long arg)
|
|
{
|
|
dbg("%scmd=0x%x", __FUNCTION__, cmd);
|
|
|
|
/* Based on code from acm.c and others */
|
|
switch (cmd) {
|
|
case TIOCMIWAIT:
|
|
/* wait for any of the 4 modem inputs (DCD,RI,DSR,CTS)*/
|
|
/* TODO */
|
|
return( 0 );
|
|
|
|
case TIOCGICOUNT:
|
|
/* return count of modemline transitions */
|
|
/* TODO */
|
|
return 0;
|
|
|
|
default:
|
|
dbg("%s: arg not supported - 0x%04x", __FUNCTION__,cmd);
|
|
return(-ENOIOCTLCMD);
|
|
break;
|
|
}
|
|
return 0;
|
|
} /* mct_u232_ioctl */
|
|
|
|
|
|
static int __init mct_u232_init (void)
|
|
{
|
|
int retval;
|
|
retval = usb_serial_register(&mct_u232_device);
|
|
if (retval)
|
|
goto failed_usb_serial_register;
|
|
retval = usb_register(&mct_u232_driver);
|
|
if (retval)
|
|
goto failed_usb_register;
|
|
info(DRIVER_DESC " " DRIVER_VERSION);
|
|
return 0;
|
|
failed_usb_register:
|
|
usb_serial_deregister(&mct_u232_device);
|
|
failed_usb_serial_register:
|
|
return retval;
|
|
}
|
|
|
|
|
|
static void __exit mct_u232_exit (void)
|
|
{
|
|
usb_deregister (&mct_u232_driver);
|
|
usb_serial_deregister (&mct_u232_device);
|
|
}
|
|
|
|
|
|
module_init (mct_u232_init);
|
|
module_exit(mct_u232_exit);
|
|
|
|
MODULE_AUTHOR( DRIVER_AUTHOR );
|
|
MODULE_DESCRIPTION( DRIVER_DESC );
|
|
MODULE_LICENSE("GPL");
|
|
|
|
module_param(debug, bool, S_IRUGO | S_IWUSR);
|
|
MODULE_PARM_DESC(debug, "Debug enabled or not");
|