Commit | Line | Data |
---|---|---|
e9a66c64 GKH |
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. | |
a5b6f60c AC |
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. | |
e9a66c64 GKH |
13 | */ |
14 | ||
15 | #include <linux/kernel.h> | |
16 | #include <linux/init.h> | |
17 | #include <linux/tty.h> | |
18 | #include <linux/tty_flip.h> | |
19 | #include <linux/module.h> | |
20 | #include <linux/usb.h> | |
a969888c | 21 | #include <linux/usb/serial.h> |
e9a66c64 GKH |
22 | |
23 | static int debug; | |
24 | ||
25 | static struct usb_device_id id_table [] = { | |
26 | { USB_DEVICE(0x0a99, 0x0001) }, /* Talon Technology device */ | |
27 | { }, | |
28 | }; | |
29 | MODULE_DEVICE_TABLE(usb, id_table); | |
30 | ||
31 | static struct usb_driver navman_driver = { | |
32 | .name = "navman", | |
33 | .probe = usb_serial_probe, | |
34 | .disconnect = usb_serial_disconnect, | |
35 | .id_table = id_table, | |
36 | .no_dynamic_id = 1, | |
37 | }; | |
38 | ||
7d12e780 | 39 | static void navman_read_int_callback(struct urb *urb) |
e9a66c64 GKH |
40 | { |
41 | struct usb_serial_port *port = urb->context; | |
42 | unsigned char *data = urb->transfer_buffer; | |
43 | struct tty_struct *tty; | |
9965d612 | 44 | int status = urb->status; |
e9a66c64 GKH |
45 | int result; |
46 | ||
9965d612 | 47 | switch (status) { |
e9a66c64 GKH |
48 | case 0: |
49 | /* success */ | |
50 | break; | |
51 | case -ECONNRESET: | |
52 | case -ENOENT: | |
53 | case -ESHUTDOWN: | |
54 | /* this urb is terminated, clean up */ | |
55 | dbg("%s - urb shutting down with status: %d", | |
441b62c1 | 56 | __func__, status); |
e9a66c64 GKH |
57 | return; |
58 | default: | |
59 | dbg("%s - nonzero urb status received: %d", | |
441b62c1 | 60 | __func__, status); |
e9a66c64 GKH |
61 | goto exit; |
62 | } | |
63 | ||
441b62c1 | 64 | usb_serial_debug_data(debug, &port->dev, __func__, |
e9a66c64 GKH |
65 | urb->actual_length, data); |
66 | ||
4a90f09b | 67 | tty = tty_port_tty_get(&port->port); |
e9a66c64 GKH |
68 | if (tty && urb->actual_length) { |
69 | tty_buffer_request_room(tty, urb->actual_length); | |
70 | tty_insert_flip_string(tty, data, urb->actual_length); | |
71 | tty_flip_buffer_push(tty); | |
72 | } | |
4a90f09b | 73 | tty_kref_put(tty); |
e9a66c64 GKH |
74 | |
75 | exit: | |
76 | result = usb_submit_urb(urb, GFP_ATOMIC); | |
77 | if (result) | |
78 | dev_err(&urb->dev->dev, | |
79 | "%s - Error %d submitting interrupt urb\n", | |
441b62c1 | 80 | __func__, result); |
e9a66c64 GKH |
81 | } |
82 | ||
95da310e AC |
83 | static int navman_open(struct tty_struct *tty, |
84 | struct usb_serial_port *port, struct file *filp) | |
e9a66c64 GKH |
85 | { |
86 | int result = 0; | |
87 | ||
441b62c1 | 88 | dbg("%s - port %d", __func__, port->number); |
e9a66c64 GKH |
89 | |
90 | if (port->interrupt_in_urb) { | |
441b62c1 | 91 | dbg("%s - adding interrupt input for treo", __func__); |
e9a66c64 GKH |
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", | |
441b62c1 | 96 | __func__, result); |
e9a66c64 GKH |
97 | } |
98 | return result; | |
99 | } | |
100 | ||
95da310e AC |
101 | static void navman_close(struct tty_struct *tty, |
102 | struct usb_serial_port *port, struct file *filp) | |
e9a66c64 | 103 | { |
441b62c1 | 104 | dbg("%s - port %d", __func__, port->number); |
e9a66c64 | 105 | |
9aac10ff | 106 | usb_kill_urb(port->interrupt_in_urb); |
e9a66c64 GKH |
107 | } |
108 | ||
95da310e | 109 | static int navman_write(struct tty_struct *tty, struct usb_serial_port *port, |
e9a66c64 GKH |
110 | const unsigned char *buf, int count) |
111 | { | |
441b62c1 | 112 | dbg("%s - port %d", __func__, port->number); |
e9a66c64 GKH |
113 | |
114 | /* | |
115 | * This device can't write any data, only read from the device | |
e9a66c64 | 116 | */ |
a5b6f60c | 117 | return -EOPNOTSUPP; |
e9a66c64 GKH |
118 | } |
119 | ||
120 | static struct usb_serial_driver navman_device = { | |
121 | .driver = { | |
122 | .owner = THIS_MODULE, | |
123 | .name = "navman", | |
124 | }, | |
125 | .id_table = id_table, | |
d9b1b787 | 126 | .usb_driver = &navman_driver, |
e9a66c64 GKH |
127 | .num_ports = 1, |
128 | .open = navman_open, | |
129 | .close = navman_close, | |
130 | .write = navman_write, | |
131 | .read_int_callback = navman_read_int_callback, | |
132 | }; | |
133 | ||
134 | static int __init navman_init(void) | |
135 | { | |
136 | int retval; | |
137 | ||
138 | retval = usb_serial_register(&navman_device); | |
139 | if (retval) | |
140 | return retval; | |
141 | retval = usb_register(&navman_driver); | |
142 | if (retval) | |
143 | usb_serial_deregister(&navman_device); | |
144 | return retval; | |
145 | } | |
146 | ||
147 | static void __exit navman_exit(void) | |
148 | { | |
149 | usb_deregister(&navman_driver); | |
150 | usb_serial_deregister(&navman_device); | |
151 | } | |
152 | ||
153 | module_init(navman_init); | |
154 | module_exit(navman_exit); | |
155 | MODULE_LICENSE("GPL"); | |
156 | ||
157 | module_param(debug, bool, S_IRUGO | S_IWUSR); | |
158 | MODULE_PARM_DESC(debug, "Debug enabled or not"); |