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// 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[0];
};
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_ */
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