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1// SPDX-License-Identifier: GPL-2.0
2/*
3 * Navman Serial USB driver
4 *
5 * Copyright (C) 2006 Greg Kroah-Hartman <gregkh@suse.de>
6 *
7 * TODO:
8 * Add termios method that uses copy_hw but also kills all echo
9 * flags as the navman is rx only so cannot echo.
10 */
11
12#include <linux/gfp.h>
13#include <linux/kernel.h>
14#include <linux/tty.h>
15#include <linux/tty_flip.h>
16#include <linux/module.h>
17#include <linux/usb.h>
18#include <linux/usb/serial.h>
19
20static const struct usb_device_id id_table[] = {
21 { USB_DEVICE(0x0a99, 0x0001) }, /* Talon Technology device */
22 { USB_DEVICE(0x0df7, 0x0900) }, /* Mobile Action i-gotU */
23 { },
24};
25MODULE_DEVICE_TABLE(usb, id_table);
26
27static void navman_read_int_callback(struct urb *urb)
28{
29 struct usb_serial_port *port = urb->context;
30 unsigned char *data = urb->transfer_buffer;
31 int status = urb->status;
32 int result;
33
34 switch (status) {
35 case 0:
36 /* success */
37 break;
38 case -ECONNRESET:
39 case -ENOENT:
40 case -ESHUTDOWN:
41 /* this urb is terminated, clean up */
42 dev_dbg(&port->dev, "%s - urb shutting down with status: %d\n",
43 __func__, status);
44 return;
45 default:
46 dev_dbg(&port->dev, "%s - nonzero urb status received: %d\n",
47 __func__, status);
48 goto exit;
49 }
50
51 usb_serial_debug_data(&port->dev, __func__, urb->actual_length, data);
52
53 if (urb->actual_length) {
54 tty_insert_flip_string(&port->port, data, urb->actual_length);
55 tty_flip_buffer_push(&port->port);
56 }
57
58exit:
59 result = usb_submit_urb(urb, GFP_ATOMIC);
60 if (result)
61 dev_err(&urb->dev->dev,
62 "%s - Error %d submitting interrupt urb\n",
63 __func__, result);
64}
65
66static int navman_open(struct tty_struct *tty, struct usb_serial_port *port)
67{
68 int result = 0;
69
70 if (port->interrupt_in_urb) {
71 dev_dbg(&port->dev, "%s - adding interrupt input for treo\n",
72 __func__);
73 result = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL);
74 if (result)
75 dev_err(&port->dev,
76 "%s - failed submitting interrupt urb, error %d\n",
77 __func__, result);
78 }
79 return result;
80}
81
82static void navman_close(struct usb_serial_port *port)
83{
84 usb_kill_urb(port->interrupt_in_urb);
85}
86
87static int navman_write(struct tty_struct *tty, struct usb_serial_port *port,
88 const unsigned char *buf, int count)
89{
90 /*
91 * This device can't write any data, only read from the device
92 */
93 return -EOPNOTSUPP;
94}
95
96static struct usb_serial_driver navman_device = {
97 .driver = {
98 .owner = THIS_MODULE,
99 .name = "navman",
100 },
101 .id_table = id_table,
102 .num_ports = 1,
103 .open = navman_open,
104 .close = navman_close,
105 .write = navman_write,
106 .read_int_callback = navman_read_int_callback,
107};
108
109static struct usb_serial_driver * const serial_drivers[] = {
110 &navman_device, NULL
111};
112
113module_usb_serial_driver(serial_drivers, id_table);
114
115MODULE_LICENSE("GPL v2");
1/*
2 * Navman Serial USB driver
3 *
4 * Copyright (C) 2006 Greg Kroah-Hartman <gregkh@suse.de>
5 *
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License
8 * version 2 as published by the Free Software Foundation.
9 *
10 * TODO:
11 * Add termios method that uses copy_hw but also kills all echo
12 * flags as the navman is rx only so cannot echo.
13 */
14
15#include <linux/gfp.h>
16#include <linux/kernel.h>
17#include <linux/init.h>
18#include <linux/tty.h>
19#include <linux/tty_flip.h>
20#include <linux/module.h>
21#include <linux/usb.h>
22#include <linux/usb/serial.h>
23
24static int debug;
25
26static const struct usb_device_id id_table[] = {
27 { USB_DEVICE(0x0a99, 0x0001) }, /* Talon Technology device */
28 { USB_DEVICE(0x0df7, 0x0900) }, /* Mobile Action i-gotU */
29 { },
30};
31MODULE_DEVICE_TABLE(usb, id_table);
32
33static struct usb_driver navman_driver = {
34 .name = "navman",
35 .probe = usb_serial_probe,
36 .disconnect = usb_serial_disconnect,
37 .id_table = id_table,
38 .no_dynamic_id = 1,
39};
40
41static void navman_read_int_callback(struct urb *urb)
42{
43 struct usb_serial_port *port = urb->context;
44 unsigned char *data = urb->transfer_buffer;
45 struct tty_struct *tty;
46 int status = urb->status;
47 int result;
48
49 switch (status) {
50 case 0:
51 /* success */
52 break;
53 case -ECONNRESET:
54 case -ENOENT:
55 case -ESHUTDOWN:
56 /* this urb is terminated, clean up */
57 dbg("%s - urb shutting down with status: %d",
58 __func__, status);
59 return;
60 default:
61 dbg("%s - nonzero urb status received: %d",
62 __func__, status);
63 goto exit;
64 }
65
66 usb_serial_debug_data(debug, &port->dev, __func__,
67 urb->actual_length, data);
68
69 tty = tty_port_tty_get(&port->port);
70 if (tty && urb->actual_length) {
71 tty_insert_flip_string(tty, data, urb->actual_length);
72 tty_flip_buffer_push(tty);
73 }
74 tty_kref_put(tty);
75
76exit:
77 result = usb_submit_urb(urb, GFP_ATOMIC);
78 if (result)
79 dev_err(&urb->dev->dev,
80 "%s - Error %d submitting interrupt urb\n",
81 __func__, result);
82}
83
84static int navman_open(struct tty_struct *tty, struct usb_serial_port *port)
85{
86 int result = 0;
87
88 dbg("%s - port %d", __func__, port->number);
89
90 if (port->interrupt_in_urb) {
91 dbg("%s - adding interrupt input for treo", __func__);
92 result = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL);
93 if (result)
94 dev_err(&port->dev,
95 "%s - failed submitting interrupt urb, error %d\n",
96 __func__, result);
97 }
98 return result;
99}
100
101static void navman_close(struct usb_serial_port *port)
102{
103 dbg("%s - port %d", __func__, port->number);
104
105 usb_kill_urb(port->interrupt_in_urb);
106}
107
108static int navman_write(struct tty_struct *tty, struct usb_serial_port *port,
109 const unsigned char *buf, int count)
110{
111 dbg("%s - port %d", __func__, port->number);
112
113 /*
114 * This device can't write any data, only read from the device
115 */
116 return -EOPNOTSUPP;
117}
118
119static struct usb_serial_driver navman_device = {
120 .driver = {
121 .owner = THIS_MODULE,
122 .name = "navman",
123 },
124 .id_table = id_table,
125 .usb_driver = &navman_driver,
126 .num_ports = 1,
127 .open = navman_open,
128 .close = navman_close,
129 .write = navman_write,
130 .read_int_callback = navman_read_int_callback,
131};
132
133static int __init navman_init(void)
134{
135 int retval;
136
137 retval = usb_serial_register(&navman_device);
138 if (retval)
139 return retval;
140 retval = usb_register(&navman_driver);
141 if (retval)
142 usb_serial_deregister(&navman_device);
143 return retval;
144}
145
146static void __exit navman_exit(void)
147{
148 usb_deregister(&navman_driver);
149 usb_serial_deregister(&navman_device);
150}
151
152module_init(navman_init);
153module_exit(navman_exit);
154MODULE_LICENSE("GPL");
155
156module_param(debug, bool, S_IRUGO | S_IWUSR);
157MODULE_PARM_DESC(debug, "Debug enabled or not");