1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0
2*4882a593Smuzhiyun /*
3*4882a593Smuzhiyun * Navman Serial USB driver
4*4882a593Smuzhiyun *
5*4882a593Smuzhiyun * Copyright (C) 2006 Greg Kroah-Hartman <gregkh@suse.de>
6*4882a593Smuzhiyun *
7*4882a593Smuzhiyun * TODO:
8*4882a593Smuzhiyun * Add termios method that uses copy_hw but also kills all echo
9*4882a593Smuzhiyun * flags as the navman is rx only so cannot echo.
10*4882a593Smuzhiyun */
11*4882a593Smuzhiyun
12*4882a593Smuzhiyun #include <linux/gfp.h>
13*4882a593Smuzhiyun #include <linux/kernel.h>
14*4882a593Smuzhiyun #include <linux/tty.h>
15*4882a593Smuzhiyun #include <linux/tty_flip.h>
16*4882a593Smuzhiyun #include <linux/module.h>
17*4882a593Smuzhiyun #include <linux/usb.h>
18*4882a593Smuzhiyun #include <linux/usb/serial.h>
19*4882a593Smuzhiyun
20*4882a593Smuzhiyun static const struct usb_device_id id_table[] = {
21*4882a593Smuzhiyun { USB_DEVICE(0x0a99, 0x0001) }, /* Talon Technology device */
22*4882a593Smuzhiyun { USB_DEVICE(0x0df7, 0x0900) }, /* Mobile Action i-gotU */
23*4882a593Smuzhiyun { },
24*4882a593Smuzhiyun };
25*4882a593Smuzhiyun MODULE_DEVICE_TABLE(usb, id_table);
26*4882a593Smuzhiyun
navman_read_int_callback(struct urb * urb)27*4882a593Smuzhiyun static void navman_read_int_callback(struct urb *urb)
28*4882a593Smuzhiyun {
29*4882a593Smuzhiyun struct usb_serial_port *port = urb->context;
30*4882a593Smuzhiyun unsigned char *data = urb->transfer_buffer;
31*4882a593Smuzhiyun int status = urb->status;
32*4882a593Smuzhiyun int result;
33*4882a593Smuzhiyun
34*4882a593Smuzhiyun switch (status) {
35*4882a593Smuzhiyun case 0:
36*4882a593Smuzhiyun /* success */
37*4882a593Smuzhiyun break;
38*4882a593Smuzhiyun case -ECONNRESET:
39*4882a593Smuzhiyun case -ENOENT:
40*4882a593Smuzhiyun case -ESHUTDOWN:
41*4882a593Smuzhiyun /* this urb is terminated, clean up */
42*4882a593Smuzhiyun dev_dbg(&port->dev, "%s - urb shutting down with status: %d\n",
43*4882a593Smuzhiyun __func__, status);
44*4882a593Smuzhiyun return;
45*4882a593Smuzhiyun default:
46*4882a593Smuzhiyun dev_dbg(&port->dev, "%s - nonzero urb status received: %d\n",
47*4882a593Smuzhiyun __func__, status);
48*4882a593Smuzhiyun goto exit;
49*4882a593Smuzhiyun }
50*4882a593Smuzhiyun
51*4882a593Smuzhiyun usb_serial_debug_data(&port->dev, __func__, urb->actual_length, data);
52*4882a593Smuzhiyun
53*4882a593Smuzhiyun if (urb->actual_length) {
54*4882a593Smuzhiyun tty_insert_flip_string(&port->port, data, urb->actual_length);
55*4882a593Smuzhiyun tty_flip_buffer_push(&port->port);
56*4882a593Smuzhiyun }
57*4882a593Smuzhiyun
58*4882a593Smuzhiyun exit:
59*4882a593Smuzhiyun result = usb_submit_urb(urb, GFP_ATOMIC);
60*4882a593Smuzhiyun if (result)
61*4882a593Smuzhiyun dev_err(&urb->dev->dev,
62*4882a593Smuzhiyun "%s - Error %d submitting interrupt urb\n",
63*4882a593Smuzhiyun __func__, result);
64*4882a593Smuzhiyun }
65*4882a593Smuzhiyun
navman_open(struct tty_struct * tty,struct usb_serial_port * port)66*4882a593Smuzhiyun static int navman_open(struct tty_struct *tty, struct usb_serial_port *port)
67*4882a593Smuzhiyun {
68*4882a593Smuzhiyun int result = 0;
69*4882a593Smuzhiyun
70*4882a593Smuzhiyun if (port->interrupt_in_urb) {
71*4882a593Smuzhiyun dev_dbg(&port->dev, "%s - adding interrupt input for treo\n",
72*4882a593Smuzhiyun __func__);
73*4882a593Smuzhiyun result = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL);
74*4882a593Smuzhiyun if (result)
75*4882a593Smuzhiyun dev_err(&port->dev,
76*4882a593Smuzhiyun "%s - failed submitting interrupt urb, error %d\n",
77*4882a593Smuzhiyun __func__, result);
78*4882a593Smuzhiyun }
79*4882a593Smuzhiyun return result;
80*4882a593Smuzhiyun }
81*4882a593Smuzhiyun
navman_close(struct usb_serial_port * port)82*4882a593Smuzhiyun static void navman_close(struct usb_serial_port *port)
83*4882a593Smuzhiyun {
84*4882a593Smuzhiyun usb_kill_urb(port->interrupt_in_urb);
85*4882a593Smuzhiyun }
86*4882a593Smuzhiyun
navman_write(struct tty_struct * tty,struct usb_serial_port * port,const unsigned char * buf,int count)87*4882a593Smuzhiyun static int navman_write(struct tty_struct *tty, struct usb_serial_port *port,
88*4882a593Smuzhiyun const unsigned char *buf, int count)
89*4882a593Smuzhiyun {
90*4882a593Smuzhiyun /*
91*4882a593Smuzhiyun * This device can't write any data, only read from the device
92*4882a593Smuzhiyun */
93*4882a593Smuzhiyun return -EOPNOTSUPP;
94*4882a593Smuzhiyun }
95*4882a593Smuzhiyun
96*4882a593Smuzhiyun static struct usb_serial_driver navman_device = {
97*4882a593Smuzhiyun .driver = {
98*4882a593Smuzhiyun .owner = THIS_MODULE,
99*4882a593Smuzhiyun .name = "navman",
100*4882a593Smuzhiyun },
101*4882a593Smuzhiyun .id_table = id_table,
102*4882a593Smuzhiyun .num_ports = 1,
103*4882a593Smuzhiyun .open = navman_open,
104*4882a593Smuzhiyun .close = navman_close,
105*4882a593Smuzhiyun .write = navman_write,
106*4882a593Smuzhiyun .read_int_callback = navman_read_int_callback,
107*4882a593Smuzhiyun };
108*4882a593Smuzhiyun
109*4882a593Smuzhiyun static struct usb_serial_driver * const serial_drivers[] = {
110*4882a593Smuzhiyun &navman_device, NULL
111*4882a593Smuzhiyun };
112*4882a593Smuzhiyun
113*4882a593Smuzhiyun module_usb_serial_driver(serial_drivers, id_table);
114*4882a593Smuzhiyun
115*4882a593Smuzhiyun MODULE_LICENSE("GPL v2");
116