linux-imx

// SPDX-License-Identifier: GPL-2.0+

/*

 * KLSI KL5KUSB105 chip RS232 converter driver

 *

 *   Copyright (C) 2010 Johan Hovold <jhovold@gmail.com>

 *   Copyright (C) 2001 Utz-Uwe Haus <haus@uuhaus.de>

 *

 * All information about the device was acquired using SniffUSB ans snoopUSB

 * on Windows98.

 * It was written out of frustration with the PalmConnect USB Serial adapter

 * sold by Palm Inc.

 * Neither Palm, nor their contractor (MCCI) or their supplier (KLSI) provided

 * information that was not already available.

 *

 * It seems that KLSI bought some silicon-design information from ScanLogic,

 * whose SL11R processor is at the core of the KL5KUSB chipset from KLSI.

 * KLSI has firmware available for their devices; it is probable that the

 * firmware differs from that used by KLSI in their products. If you have an

 * original KLSI device and can provide some information on it, I would be

 * most interested in adding support for it here. If you have any information

 * on the protocol used (or find errors in my reverse-engineered stuff), please

 * let me know.

 *

 * The code was only tested with a PalmConnect USB adapter; if you

 * are adventurous, try it with any KLSI-based device and let me know how it

 * breaks so that I can fix it!

 */

​

/* TODO:

 *  check modem line signals

 *  implement handshaking or decide that we do not support it

 */

​

#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/uaccess.h>

#include <asm/unaligned.h>

#include <linux/usb.h>

#include <linux/usb/serial.h>

#include "kl5kusb105.h"

​

#define DRIVER_AUTHOR "Utz-Uwe Haus <haus@uuhaus.de>, Johan Hovold <jhovold@gmail.com>"

#define DRIVER_DESC "KLSI KL5KUSB105 chipset USB->Serial Converter driver"

​

​

/*

 * Function prototypes

 */

static int klsi_105_port_probe(struct usb_serial_port *port);

static int klsi_105_port_remove(struct usb_serial_port *port);

static int  klsi_105_open(struct tty_struct *tty, struct usb_serial_port *port);

static void klsi_105_close(struct usb_serial_port *port);

static void klsi_105_set_termios(struct tty_struct *tty,

            struct usb_serial_port *port, struct ktermios *old);

static int  klsi_105_tiocmget(struct tty_struct *tty);

static void klsi_105_process_read_urb(struct urb *urb);

static int klsi_105_prepare_write_buffer(struct usb_serial_port *port,

                        void *dest, size_t size);

​

/*

 * All of the device info needed for the KLSI converters.

 */

static const struct usb_device_id id_table[] = {

    { USB_DEVICE(PALMCONNECT_VID, PALMCONNECT_PID) },

    { }     /* Terminating entry */

};

​

MODULE_DEVICE_TABLE(usb, id_table);

​

static struct usb_serial_driver kl5kusb105d_device = {

    .driver = {

        .owner =    THIS_MODULE,

        .name =     "kl5kusb105d",

    },

    .description =      "KL5KUSB105D / PalmConnect",

    .id_table =     id_table,

    .num_ports =        1,

    .bulk_out_size =    64,

    .open =         klsi_105_open,

    .close =        klsi_105_close,

    .set_termios =      klsi_105_set_termios,

    .tiocmget =     klsi_105_tiocmget,

    .port_probe =       klsi_105_port_probe,

    .port_remove =      klsi_105_port_remove,

    .throttle =     usb_serial_generic_throttle,

    .unthrottle =       usb_serial_generic_unthrottle,

    .process_read_urb = klsi_105_process_read_urb,