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
182
183
184
185
|
/* SPDX-License-Identifier: GPL-2.0+ */
/******************************************************************************
* usbatm.h - Generic USB xDSL driver core
*
* Copyright (C) 2001, Alcatel
* Copyright (C) 2003, Duncan Sands, SolNegro, Josep Comas
* Copyright (C) 2004, David Woodhouse
******************************************************************************/
#ifndef _USBATM_H_
#define _USBATM_H_
#include <linux/atm.h>
#include <linux/atmdev.h>
#include <linux/completion.h>
#include <linux/device.h>
#include <linux/kernel.h>
#include <linux/kref.h>
#include <linux/list.h>
#include <linux/stringify.h>
#include <linux/usb.h>
#include <linux/mutex.h>
#include <linux/ratelimit.h>
/*
#define VERBOSE_DEBUG
*/
#define usb_err(instance, format, arg...) \
dev_err(&(instance)->usb_intf->dev , format , ## arg)
#define usb_info(instance, format, arg...) \
dev_info(&(instance)->usb_intf->dev , format , ## arg)
#define usb_warn(instance, format, arg...) \
dev_warn(&(instance)->usb_intf->dev , format , ## arg)
#define usb_dbg(instance, format, arg...) \
dev_dbg(&(instance)->usb_intf->dev , format , ## arg)
/* FIXME: move to dev_* once ATM is driver model aware */
#define atm_printk(level, instance, format, arg...) \
printk(level "ATM dev %d: " format , \
(instance)->atm_dev->number , ## arg)
#define atm_err(instance, format, arg...) \
atm_printk(KERN_ERR, instance , format , ## arg)
#define atm_info(instance, format, arg...) \
atm_printk(KERN_INFO, instance , format , ## arg)
#define atm_warn(instance, format, arg...) \
atm_printk(KERN_WARNING, instance , format , ## arg)
#define atm_dbg(instance, format, ...) \
pr_debug("ATM dev %d: " format, \
(instance)->atm_dev->number, ##__VA_ARGS__)
#define atm_rldbg(instance, format, ...) \
pr_debug_ratelimited("ATM dev %d: " format, \
(instance)->atm_dev->number, ##__VA_ARGS__)
/* flags, set by mini-driver in bind() */
#define UDSL_SKIP_HEAVY_INIT (1<<0)
#define UDSL_USE_ISOC (1<<1)
#define UDSL_IGNORE_EILSEQ (1<<2)
/* mini driver */
struct usbatm_data;
/*
* Assuming all methods exist and succeed, they are called in this order:
*
* bind, heavy_init, atm_start, ..., atm_stop, unbind
*/
struct usbatm_driver {
const char *driver_name;
/* init device ... can sleep, or cause probe() failure */
int (*bind) (struct usbatm_data *, struct usb_interface *,
const struct usb_device_id *id);
/* additional device initialization that is too slow to be done in probe() */
int (*heavy_init) (struct usbatm_data *, struct usb_interface *);
/* cleanup device ... can sleep, but can't fail */
void (*unbind) (struct usbatm_data *, struct usb_interface *);
/* init ATM device ... can sleep, or cause ATM initialization failure */
int (*atm_start) (struct usbatm_data *, struct atm_dev *);
/* cleanup ATM device ... can sleep, but can't fail */
void (*atm_stop) (struct usbatm_data *, struct atm_dev *);
int bulk_in; /* bulk rx endpoint */
int isoc_in; /* isochronous rx endpoint */
int bulk_out; /* bulk tx endpoint */
unsigned rx_padding;
unsigned tx_padding;
};
extern int usbatm_usb_probe(struct usb_interface *intf, const struct usb_device_id *id,
struct usbatm_driver *driver);
extern void usbatm_usb_disconnect(struct usb_interface *intf);
struct usbatm_channel {
int endpoint; /* usb pipe */
unsigned int stride; /* ATM cell size + padding */
unsigned int buf_size; /* urb buffer size */
unsigned int packet_size; /* endpoint maxpacket */
spinlock_t lock;
struct list_head list;
struct tasklet_struct tasklet;
struct timer_list delay;
struct usbatm_data *usbatm;
};
/* main driver data */
struct usbatm_data {
/******************
* public fields *
******************/
/* mini driver */
struct usbatm_driver *driver;
void *driver_data;
char driver_name[16];
unsigned int flags; /* set by mini-driver in bind() */
/* USB device */
struct usb_device *usb_dev;
struct usb_interface *usb_intf;
char description[64];
/* ATM device */
struct atm_dev *atm_dev;
/********************************
* private fields - do not use *
********************************/
struct kref refcount;
struct mutex serialize;
int disconnected;
/* heavy init */
struct task_struct *thread;
struct completion thread_started;
struct completion thread_exited;
/* ATM device */
struct list_head vcc_list;
struct usbatm_channel rx_channel;
struct usbatm_channel tx_channel;
struct sk_buff_head sndqueue;
struct sk_buff *current_skb; /* being emptied */
struct usbatm_vcc_data *cached_vcc;
int cached_vci;
short cached_vpi;
unsigned char *cell_buf; /* holds partial rx cell */
unsigned int buf_usage;
struct urb *urbs[];
};
static inline void *to_usbatm_driver_data(struct usb_interface *intf)
{
struct usbatm_data *usbatm_instance;
if (intf == NULL)
return NULL;
usbatm_instance = usb_get_intfdata(intf);
if (usbatm_instance == NULL) /* set NULL before unbind() */
return NULL;
return usbatm_instance->driver_data; /* set NULL after unbind() */
}
#endif /* _USBATM_H_ */
|
