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1/* SPDX-License-Identifier: GPL-2.0+ */
2/******************************************************************************
3 * usbatm.h - Generic USB xDSL driver core
4 *
5 * Copyright (C) 2001, Alcatel
6 * Copyright (C) 2003, Duncan Sands, SolNegro, Josep Comas
7 * Copyright (C) 2004, David Woodhouse
8 ******************************************************************************/
9
10#ifndef _USBATM_H_
11#define _USBATM_H_
12
13#include <linux/atm.h>
14#include <linux/atmdev.h>
15#include <linux/completion.h>
16#include <linux/device.h>
17#include <linux/kernel.h>
18#include <linux/kref.h>
19#include <linux/list.h>
20#include <linux/stringify.h>
21#include <linux/usb.h>
22#include <linux/mutex.h>
23#include <linux/ratelimit.h>
24
25/*
26#define VERBOSE_DEBUG
27*/
28
29#define usb_err(instance, format, arg...) \
30 dev_err(&(instance)->usb_intf->dev , format , ## arg)
31#define usb_info(instance, format, arg...) \
32 dev_info(&(instance)->usb_intf->dev , format , ## arg)
33#define usb_warn(instance, format, arg...) \
34 dev_warn(&(instance)->usb_intf->dev , format , ## arg)
35#define usb_dbg(instance, format, arg...) \
36 dev_dbg(&(instance)->usb_intf->dev , format , ## arg)
37
38/* FIXME: move to dev_* once ATM is driver model aware */
39#define atm_printk(level, instance, format, arg...) \
40 printk(level "ATM dev %d: " format , \
41 (instance)->atm_dev->number , ## arg)
42
43#define atm_err(instance, format, arg...) \
44 atm_printk(KERN_ERR, instance , format , ## arg)
45#define atm_info(instance, format, arg...) \
46 atm_printk(KERN_INFO, instance , format , ## arg)
47#define atm_warn(instance, format, arg...) \
48 atm_printk(KERN_WARNING, instance , format , ## arg)
49#define atm_dbg(instance, format, ...) \
50 pr_debug("ATM dev %d: " format, \
51 (instance)->atm_dev->number, ##__VA_ARGS__)
52#define atm_rldbg(instance, format, ...) \
53 pr_debug_ratelimited("ATM dev %d: " format, \
54 (instance)->atm_dev->number, ##__VA_ARGS__)
55
56/* flags, set by mini-driver in bind() */
57
58#define UDSL_SKIP_HEAVY_INIT (1<<0)
59#define UDSL_USE_ISOC (1<<1)
60#define UDSL_IGNORE_EILSEQ (1<<2)
61
62
63/* mini driver */
64
65struct usbatm_data;
66
67/*
68* Assuming all methods exist and succeed, they are called in this order:
69*
70* bind, heavy_init, atm_start, ..., atm_stop, unbind
71*/
72
73struct usbatm_driver {
74 const char *driver_name;
75
76 /* init device ... can sleep, or cause probe() failure */
77 int (*bind) (struct usbatm_data *, struct usb_interface *,
78 const struct usb_device_id *id);
79
80 /* additional device initialization that is too slow to be done in probe() */
81 int (*heavy_init) (struct usbatm_data *, struct usb_interface *);
82
83 /* cleanup device ... can sleep, but can't fail */
84 void (*unbind) (struct usbatm_data *, struct usb_interface *);
85
86 /* init ATM device ... can sleep, or cause ATM initialization failure */
87 int (*atm_start) (struct usbatm_data *, struct atm_dev *);
88
89 /* cleanup ATM device ... can sleep, but can't fail */
90 void (*atm_stop) (struct usbatm_data *, struct atm_dev *);
91
92 int bulk_in; /* bulk rx endpoint */
93 int isoc_in; /* isochronous rx endpoint */
94 int bulk_out; /* bulk tx endpoint */
95
96 unsigned rx_padding;
97 unsigned tx_padding;
98};
99
100extern int usbatm_usb_probe(struct usb_interface *intf, const struct usb_device_id *id,
101 struct usbatm_driver *driver);
102extern void usbatm_usb_disconnect(struct usb_interface *intf);
103
104
105struct usbatm_channel {
106 int endpoint; /* usb pipe */
107 unsigned int stride; /* ATM cell size + padding */
108 unsigned int buf_size; /* urb buffer size */
109 unsigned int packet_size; /* endpoint maxpacket */
110 spinlock_t lock;
111 struct list_head list;
112 struct tasklet_struct tasklet;
113 struct timer_list delay;
114 struct usbatm_data *usbatm;
115};
116
117/* main driver data */
118
119struct usbatm_data {
120 /******************
121 * public fields *
122 ******************/
123
124 /* mini driver */
125 struct usbatm_driver *driver;
126 void *driver_data;
127 char driver_name[16];
128 unsigned int flags; /* set by mini-driver in bind() */
129
130 /* USB device */
131 struct usb_device *usb_dev;
132 struct usb_interface *usb_intf;
133 char description[64];
134
135 /* ATM device */
136 struct atm_dev *atm_dev;
137
138 /********************************
139 * private fields - do not use *
140 ********************************/
141
142 struct kref refcount;
143 struct mutex serialize;
144 int disconnected;
145
146 /* heavy init */
147 struct task_struct *thread;
148 struct completion thread_started;
149 struct completion thread_exited;
150
151 /* ATM device */
152 struct list_head vcc_list;
153
154 struct usbatm_channel rx_channel;
155 struct usbatm_channel tx_channel;
156
157 struct sk_buff_head sndqueue;
158 struct sk_buff *current_skb; /* being emptied */
159
160 struct usbatm_vcc_data *cached_vcc;
161 int cached_vci;
162 short cached_vpi;
163
164 unsigned char *cell_buf; /* holds partial rx cell */
165 unsigned int buf_usage;
166
167 struct urb *urbs[];
168};
169
170static inline void *to_usbatm_driver_data(struct usb_interface *intf)
171{
172 struct usbatm_data *usbatm_instance;
173
174 if (intf == NULL)
175 return NULL;
176
177 usbatm_instance = usb_get_intfdata(intf);
178
179 if (usbatm_instance == NULL) /* set NULL before unbind() */
180 return NULL;
181
182 return usbatm_instance->driver_data; /* set NULL after unbind() */
183}
184
185#endif /* _USBATM_H_ */
1/******************************************************************************
2 * usbatm.h - Generic USB xDSL driver core
3 *
4 * Copyright (C) 2001, Alcatel
5 * Copyright (C) 2003, Duncan Sands, SolNegro, Josep Comas
6 * Copyright (C) 2004, David Woodhouse
7 *
8 * This program is free software; you can redistribute it and/or modify it
9 * under the terms of the GNU General Public License as published by the Free
10 * Software Foundation; either version 2 of the License, or (at your option)
11 * any later version.
12 *
13 * This program is distributed in the hope that it will be useful, but WITHOUT
14 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
15 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
16 * more details.
17 *
18 * You should have received a copy of the GNU General Public License along with
19 * this program; if not, write to the Free Software Foundation, Inc., 59
20 * Temple Place - Suite 330, Boston, MA 02111-1307, USA.
21 *
22 ******************************************************************************/
23
24#ifndef _USBATM_H_
25#define _USBATM_H_
26
27#include <linux/atm.h>
28#include <linux/atmdev.h>
29#include <linux/completion.h>
30#include <linux/device.h>
31#include <linux/kernel.h>
32#include <linux/kref.h>
33#include <linux/list.h>
34#include <linux/stringify.h>
35#include <linux/usb.h>
36#include <linux/mutex.h>
37#include <linux/ratelimit.h>
38
39/*
40#define VERBOSE_DEBUG
41*/
42
43#define usb_err(instance, format, arg...) \
44 dev_err(&(instance)->usb_intf->dev , format , ## arg)
45#define usb_info(instance, format, arg...) \
46 dev_info(&(instance)->usb_intf->dev , format , ## arg)
47#define usb_warn(instance, format, arg...) \
48 dev_warn(&(instance)->usb_intf->dev , format , ## arg)
49#define usb_dbg(instance, format, arg...) \
50 dev_dbg(&(instance)->usb_intf->dev , format , ## arg)
51
52/* FIXME: move to dev_* once ATM is driver model aware */
53#define atm_printk(level, instance, format, arg...) \
54 printk(level "ATM dev %d: " format , \
55 (instance)->atm_dev->number , ## arg)
56
57#define atm_err(instance, format, arg...) \
58 atm_printk(KERN_ERR, instance , format , ## arg)
59#define atm_info(instance, format, arg...) \
60 atm_printk(KERN_INFO, instance , format , ## arg)
61#define atm_warn(instance, format, arg...) \
62 atm_printk(KERN_WARNING, instance , format , ## arg)
63#define atm_dbg(instance, format, ...) \
64 pr_debug("ATM dev %d: " format, \
65 (instance)->atm_dev->number, ##__VA_ARGS__)
66#define atm_rldbg(instance, format, ...) \
67 pr_debug_ratelimited("ATM dev %d: " format, \
68 (instance)->atm_dev->number, ##__VA_ARGS__)
69
70/* flags, set by mini-driver in bind() */
71
72#define UDSL_SKIP_HEAVY_INIT (1<<0)
73#define UDSL_USE_ISOC (1<<1)
74#define UDSL_IGNORE_EILSEQ (1<<2)
75
76
77/* mini driver */
78
79struct usbatm_data;
80
81/*
82* Assuming all methods exist and succeed, they are called in this order:
83*
84* bind, heavy_init, atm_start, ..., atm_stop, unbind
85*/
86
87struct usbatm_driver {
88 const char *driver_name;
89
90 /* init device ... can sleep, or cause probe() failure */
91 int (*bind) (struct usbatm_data *, struct usb_interface *,
92 const struct usb_device_id *id);
93
94 /* additional device initialization that is too slow to be done in probe() */
95 int (*heavy_init) (struct usbatm_data *, struct usb_interface *);
96
97 /* cleanup device ... can sleep, but can't fail */
98 void (*unbind) (struct usbatm_data *, struct usb_interface *);
99
100 /* init ATM device ... can sleep, or cause ATM initialization failure */
101 int (*atm_start) (struct usbatm_data *, struct atm_dev *);
102
103 /* cleanup ATM device ... can sleep, but can't fail */
104 void (*atm_stop) (struct usbatm_data *, struct atm_dev *);
105
106 int bulk_in; /* bulk rx endpoint */
107 int isoc_in; /* isochronous rx endpoint */
108 int bulk_out; /* bulk tx endpoint */
109
110 unsigned rx_padding;
111 unsigned tx_padding;
112};
113
114extern int usbatm_usb_probe(struct usb_interface *intf, const struct usb_device_id *id,
115 struct usbatm_driver *driver);
116extern void usbatm_usb_disconnect(struct usb_interface *intf);
117
118
119struct usbatm_channel {
120 int endpoint; /* usb pipe */
121 unsigned int stride; /* ATM cell size + padding */
122 unsigned int buf_size; /* urb buffer size */
123 unsigned int packet_size; /* endpoint maxpacket */
124 spinlock_t lock;
125 struct list_head list;
126 struct tasklet_struct tasklet;
127 struct timer_list delay;
128 struct usbatm_data *usbatm;
129};
130
131/* main driver data */
132
133struct usbatm_data {
134 /******************
135 * public fields *
136 ******************/
137
138 /* mini driver */
139 struct usbatm_driver *driver;
140 void *driver_data;
141 char driver_name[16];
142 unsigned int flags; /* set by mini-driver in bind() */
143
144 /* USB device */
145 struct usb_device *usb_dev;
146 struct usb_interface *usb_intf;
147 char description[64];
148
149 /* ATM device */
150 struct atm_dev *atm_dev;
151
152 /********************************
153 * private fields - do not use *
154 ********************************/
155
156 struct kref refcount;
157 struct mutex serialize;
158 int disconnected;
159
160 /* heavy init */
161 struct task_struct *thread;
162 struct completion thread_started;
163 struct completion thread_exited;
164
165 /* ATM device */
166 struct list_head vcc_list;
167
168 struct usbatm_channel rx_channel;
169 struct usbatm_channel tx_channel;
170
171 struct sk_buff_head sndqueue;
172 struct sk_buff *current_skb; /* being emptied */
173
174 struct usbatm_vcc_data *cached_vcc;
175 int cached_vci;
176 short cached_vpi;
177
178 unsigned char *cell_buf; /* holds partial rx cell */
179 unsigned int buf_usage;
180
181 struct urb *urbs[0];
182};
183
184static inline void *to_usbatm_driver_data(struct usb_interface *intf)
185{
186 struct usbatm_data *usbatm_instance;
187
188 if (intf == NULL)
189 return NULL;
190
191 usbatm_instance = usb_get_intfdata(intf);
192
193 if (usbatm_instance == NULL) /* set NULL before unbind() */
194 return NULL;
195
196 return usbatm_instance->driver_data; /* set NULL after unbind() */
197}
198
199#endif /* _USBATM_H_ */