1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
|
/*
* USB Serial Converter driver
*
* Copyright (C) 1999, 2000
* Greg Kroah-Hartman (greg@kroah.com)
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* See Documentation/usb/usb-serial.txt for more information on using this driver
*
* (07/19/2000) gkh, pberger, and borchers
* Modifications to allow usb-serial drivers to be modules.
*
*
*/
#ifndef __LINUX_USB_SERIAL_H
#define __LINUX_USB_SERIAL_H
#include <linux/config.h>
#define SERIAL_TTY_MAJOR 188 /* Nice legal number now */
#define SERIAL_TTY_MINORS 255 /* loads of devices :) */
#define MAX_NUM_PORTS 8 /* The maximum number of ports one device can grab at once */
#define USB_SERIAL_MAGIC 0x6702 /* magic number for usb_serial struct */
#define USB_SERIAL_PORT_MAGIC 0x7301 /* magic number for usb_serial_port struct */
/* parity check flag */
#define RELEVANT_IFLAG(iflag) (iflag & (IGNBRK|BRKINT|IGNPAR|PARMRK|INPCK))
struct usb_serial_port {
int magic;
struct usb_serial *serial; /* pointer back to the owner of this port */
struct tty_struct * tty; /* the coresponding tty for this port */
unsigned char number;
char active; /* someone has this device open */
unsigned char * interrupt_in_buffer;
struct urb * interrupt_in_urb;
unsigned char * bulk_in_buffer;
struct urb * read_urb;
unsigned char * bulk_out_buffer;
int bulk_out_size;
struct urb * write_urb;
wait_queue_head_t write_wait;
struct tq_struct tqueue; /* task queue for line discipline waking up */
void * private; /* data private to the specific port */
};
struct usb_serial {
int magic;
struct usb_device * dev;
struct usb_serial_device_type * type; /* the type of usb serial device this is */
struct usb_interface * interface; /* the interface for this device */
struct tty_driver * tty_driver; /* the tty_driver for this device */
unsigned char minor; /* the starting minor number for this device */
unsigned char num_ports; /* the number of ports this device has */
char num_interrupt_in; /* number of interrupt in endpoints we have */
char num_bulk_in; /* number of bulk in endpoints we have */
char num_bulk_out; /* number of bulk out endpoints we have */
struct usb_serial_port port[MAX_NUM_PORTS];
void * private; /* data private to the specific driver */
};
#define MUST_HAVE_NOT 0x01
#define MUST_HAVE 0x02
#define DONT_CARE 0x03
#define HAS 0x02
#define HAS_NOT 0x01
#define NUM_DONT_CARE (-1)
/* This structure defines the individual serial converter. */
struct usb_serial_device_type {
char *name;
__u16 *idVendor;
__u16 *idProduct;
char needs_interrupt_in;
char needs_bulk_in;
char needs_bulk_out;
char num_interrupt_in;
char num_bulk_in;
char num_bulk_out;
char num_ports; /* number of serial ports this device has */
struct list_head driver_list;
/* function call to make before accepting driver */
int (*startup) (struct usb_serial *serial); /* return 0 to continue initialization, anything else to abort */
void (*shutdown) (struct usb_serial *serial);
/* serial function calls */
int (*open) (struct usb_serial_port *port, struct file * filp);
void (*close) (struct usb_serial_port *port, struct file * filp);
int (*write) (struct usb_serial_port *port, int from_user, const unsigned char *buf, int count);
int (*write_room) (struct usb_serial_port *port);
int (*ioctl) (struct usb_serial_port *port, struct file * file, unsigned int cmd, unsigned long arg);
void (*set_termios) (struct usb_serial_port *port, struct termios * old);
void (*break_ctl) (struct usb_serial_port *port, int break_state);
int (*chars_in_buffer) (struct usb_serial_port *port);
void (*throttle) (struct usb_serial_port *port);
void (*unthrottle) (struct usb_serial_port *port);
void (*read_int_callback)(struct urb *urb);
void (*read_bulk_callback)(struct urb *urb);
void (*write_bulk_callback)(struct urb *urb);
};
extern int usb_serial_register(struct usb_serial_device_type *new_device);
extern void usb_serial_deregister(struct usb_serial_device_type *device);
/* determine if we should include the EzUSB loader functions */
#if defined(CONFIG_USB_SERIAL_KEYSPAN_PDA) || defined(CONFIG_USB_SERIAL_WHITEHEAT) || defined(CONFIG_USB_SERIAL_KEYSPAN) || defined(CONFIG_USB_SERIAL_KEYSPAN_PDA_MODULE) || defined(CONFIG_USB_SERIAL_WHITEHEAT_MODULE) || defined(CONFIG_USB_SERIAL_KEYSPAN_MODULE)
#define USES_EZUSB_FUNCTIONS
extern int ezusb_writememory (struct usb_serial *serial, int address, unsigned char *data, int length, __u8 bRequest);
extern int ezusb_set_reset (struct usb_serial *serial, unsigned char reset_bit);
#else
#undef USES_EZUSB_FUNCTIONS
#endif
/* Inline functions to check the sanity of a pointer that is passed to us */
static inline int serial_paranoia_check (struct usb_serial *serial, const char *function)
{
if (!serial) {
dbg("%s - serial == NULL", function);
return -1;
}
if (serial->magic != USB_SERIAL_MAGIC) {
dbg("%s - bad magic number for serial", function);
return -1;
}
if (!serial->type) {
dbg("%s - serial->type == NULL!", function);
return -1;
}
return 0;
}
static inline int port_paranoia_check (struct usb_serial_port *port, const char *function)
{
if (!port) {
dbg("%s - port == NULL", function);
return -1;
}
if (port->magic != USB_SERIAL_PORT_MAGIC) {
dbg("%s - bad magic number for port", function);
return -1;
}
if (!port->serial) {
dbg("%s - port->serial == NULL", function);
return -1;
}
if (!port->tty) {
dbg("%s - port->tty == NULL", function);
return -1;
}
return 0;
}
#endif /* ifdef __LINUX_USB_SERIAL_H */
|
