linux-imx

// SPDX-License-Identifier: GPL-2.0

/*

 * Navman Serial USB driver

 *

 * Copyright (C) 2006 Greg Kroah-Hartman <gregkh@suse.de>

 *

 * TODO:

 *  Add termios method that uses copy_hw but also kills all echo

 *  flags as the navman is rx only so cannot echo.

 */

​

#include <linux/gfp.h>

#include <linux/kernel.h>

#include <linux/tty.h>

#include <linux/tty_flip.h>

#include <linux/module.h>

#include <linux/usb.h>

#include <linux/usb/serial.h>

​

static const struct usb_device_id id_table[] = {

    { USB_DEVICE(0x0a99, 0x0001) }, /* Talon Technology device */

    { USB_DEVICE(0x0df7, 0x0900) }, /* Mobile Action i-gotU */

    { },

};

MODULE_DEVICE_TABLE(usb, id_table);

​

static void navman_read_int_callback(struct urb *urb)

{

    struct usb_serial_port *port = urb->context;

    unsigned char *data = urb->transfer_buffer;

    int status = urb->status;

    int result;

​

    switch (status) {

    case 0:

        /* success */

        break;

    case -ECONNRESET:

    case -ENOENT:

    case -ESHUTDOWN:

        /* this urb is terminated, clean up */

        dev_dbg(&port->dev, "%s - urb shutting down with status: %d\n",

            __func__, status);

        return;

    default:

        dev_dbg(&port->dev, "%s - nonzero urb status received: %d\n",

            __func__, status);

        goto exit;

    }

​

    usb_serial_debug_data(&port->dev, __func__, urb->actual_length, data);

​

    if (urb->actual_length) {

        tty_insert_flip_string(&port->port, data, urb->actual_length);

        tty_flip_buffer_push(&port->port);

    }

​

exit:

    result = usb_submit_urb(urb, GFP_ATOMIC);

    if (result)

        dev_err(&urb->dev->dev,

            "%s - Error %d submitting interrupt urb\n",

            __func__, result);