// SPDX-License-Identifier: GPL-2.0
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/*
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* Navman Serial USB driver
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*
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* Copyright (C) 2006 Greg Kroah-Hartman <gregkh@suse.de>
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*
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* TODO:
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* Add termios method that uses copy_hw but also kills all echo
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* flags as the navman is rx only so cannot echo.
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*/
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#include <linux/gfp.h>
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#include <linux/kernel.h>
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#include <linux/tty.h>
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#include <linux/tty_flip.h>
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#include <linux/module.h>
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#include <linux/usb.h>
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#include <linux/usb/serial.h>
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static const struct usb_device_id id_table[] = {
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{ USB_DEVICE(0x0a99, 0x0001) }, /* Talon Technology device */
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{ USB_DEVICE(0x0df7, 0x0900) }, /* Mobile Action i-gotU */
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{ },
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};
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MODULE_DEVICE_TABLE(usb, id_table);
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static void navman_read_int_callback(struct urb *urb)
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{
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struct usb_serial_port *port = urb->context;
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unsigned char *data = urb->transfer_buffer;
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int status = urb->status;
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int result;
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switch (status) {
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case 0:
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/* success */
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break;
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case -ECONNRESET:
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case -ENOENT:
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case -ESHUTDOWN:
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/* this urb is terminated, clean up */
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dev_dbg(&port->dev, "%s - urb shutting down with status: %d\n",
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__func__, status);
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return;
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default:
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dev_dbg(&port->dev, "%s - nonzero urb status received: %d\n",
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__func__, status);
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goto exit;
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}
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usb_serial_debug_data(&port->dev, __func__, urb->actual_length, data);
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if (urb->actual_length) {
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tty_insert_flip_string(&port->port, data, urb->actual_length);
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tty_flip_buffer_push(&port->port);
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}
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exit:
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result = usb_submit_urb(urb, GFP_ATOMIC);
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if (result)
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dev_err(&urb->dev->dev,
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"%s - Error %d submitting interrupt urb\n",
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__func__, result);
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}
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static int navman_open(struct tty_struct *tty, struct usb_serial_port *port)
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{
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int result = 0;
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if (port->interrupt_in_urb) {
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dev_dbg(&port->dev, "%s - adding interrupt input for treo\n",
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__func__);
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result = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL);
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if (result)
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dev_err(&port->dev,
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"%s - failed submitting interrupt urb, error %d\n",
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__func__, result);
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}
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return result;
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}
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static void navman_close(struct usb_serial_port *port)
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{
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usb_kill_urb(port->interrupt_in_urb);
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}
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static int navman_write(struct tty_struct *tty, struct usb_serial_port *port,
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const unsigned char *buf, int count)
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{
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/*
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* This device can't write any data, only read from the device
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*/
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return -EOPNOTSUPP;
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}
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static struct usb_serial_driver navman_device = {
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.driver = {
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.owner = THIS_MODULE,
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.name = "navman",
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},
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.id_table = id_table,
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.num_ports = 1,
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.open = navman_open,
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.close = navman_close,
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.write = navman_write,
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.read_int_callback = navman_read_int_callback,
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};
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static struct usb_serial_driver * const serial_drivers[] = {
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&navman_device, NULL
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};
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module_usb_serial_driver(serial_drivers, id_table);
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MODULE_LICENSE("GPL v2");
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