Adding upstream version 6.1.76.upstream/6.1.76upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 185 insertions, 0 deletions

diff --git a/drivers/usb/atm/usbatm.h b/drivers/usb/atm/usbatm.h
new file mode 100644
index 000000000..d96658e2e
--- /dev/null
+++ b/drivers/usb/atm/usbatm.h
@@ -0,0 +1,185 @@
+/* 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_ */