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// SPDX-License-Identifier: GPL-2.0
/*
* Navman Serial USB driver
*
* Copyright (C) 2006 Greg Kroah-Hartman <gregkh@suse.de>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* version 2 as published by the Free Software Foundation.
*
* 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);
}
static int navman_open(struct tty_struct *tty, struct usb_serial_port *port)
{
int result = 0;
if (port->interrupt_in_urb) {
dev_dbg(&port->dev, "%s - adding interrupt input for treo\n",
__func__);
result = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL);
if (result)
dev_err(&port->dev,
"%s - failed submitting interrupt urb, error %d\n",
__func__, result);
}
return result;
}
static void navman_close(struct usb_serial_port *port)
{
usb_kill_urb(port->interrupt_in_urb);
}
static int navman_write(struct tty_struct *tty, struct usb_serial_port *port,
const unsigned char *buf, int count)
{
/*
* This device can't write any data, only read from the device
*/
return -EOPNOTSUPP;
}
static struct usb_serial_driver navman_device = {
.driver = {
.owner = THIS_MODULE,
.name = "navman",
},
.id_table = id_table,
.num_ports = 1,
.open = navman_open,
.close = navman_close,
.write = navman_write,
.read_int_callback = navman_read_int_callback,
};
static struct usb_serial_driver * const serial_drivers[] = {
&navman_device, NULL
};
module_usb_serial_driver(serial_drivers, id_table);
MODULE_LICENSE("GPL");
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