/****************************************************************************** *  xusbatm.c -	dumb usbatm-based driver for modems initialized in userspace * *  Copyright (C) 2005 Duncan Sands, Roman Kagan (rkagan % mail ! ru) * *  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. * *  This program is distributed in the hope that it will be useful, but WITHOUT *  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or *  FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for *  more details. * *  You should have received a copy of the GNU General Public License along with *  this program; if not, write to the Free Software Foundation, Inc., 59 *  Temple Place - Suite 330, Boston, MA  02111-1307, USA. * ******************************************************************************/#include <linux/module.h>#include <linux/netdevice.h>		/* FIXME: required by linux/etherdevice.h */#include <linux/etherdevice.h>		/* for random_ether_addr() */#include "usbatm.h"#define XUSBATM_DRIVERS_MAX	8#define XUSBATM_PARM(name, type, parmtype, desc) \	static type name[XUSBATM_DRIVERS_MAX]; \	static int num_##name; \	module_param_array(name, parmtype, &num_##name, 0444); \	MODULE_PARM_DESC(name, desc)XUSBATM_PARM(vendor, unsigned short, ushort, "USB device vendor");XUSBATM_PARM(product, unsigned short, ushort, "USB device product");XUSBATM_PARM(rx_endpoint, unsigned char, byte, "rx endpoint number");XUSBATM_PARM(tx_endpoint, unsigned char, byte, "tx endpoint number");XUSBATM_PARM(rx_padding, unsigned char, byte, "rx padding (default 0)");XUSBATM_PARM(tx_padding, unsigned char, byte, "tx padding (default 0)");static const char xusbatm_driver_name[] = "xusbatm";static struct usbatm_driver xusbatm_drivers[XUSBATM_DRIVERS_MAX];static struct usb_device_id xusbatm_usb_ids[XUSBATM_DRIVERS_MAX + 1];static struct usb_driver xusbatm_usb_driver;static int usb_intf_has_ep(const struct usb_interface *intf, u8 ep){	int i, j;	for (i = 0; i < intf->num_altsetting; i++) {		struct usb_host_interface *alt = intf->altsetting;		for (j = 0; j < alt->desc.bNumEndpoints; j++)			if ((alt->endpoint[i].desc.bEndpointAddress & USB_ENDPOINT_NUMBER_MASK) == ep)				return 1;	}	return 0;}static int xusbatm_bind(struct usbatm_data *usbatm_instance,			struct usb_interface *intf, const struct usb_device_id *id,			int *need_heavy_init){	struct usb_device *usb_dev = interface_to_usbdev(intf);	int drv_ix = id - xusbatm_usb_ids;	int rx_ep_present = usb_intf_has_ep(intf, rx_endpoint[drv_ix]);	int tx_ep_present = usb_intf_has_ep(intf, tx_endpoint[drv_ix]);	u8 searched_ep = rx_ep_present ? tx_endpoint[drv_ix] : rx_endpoint[drv_ix];	int i, ret;	usb_dbg(usbatm_instance, "%s: binding driver %d: vendor %#x product %#x"		" rx: ep %#x padd %d tx: ep %#x padd %d\n",		__func__, drv_ix, vendor[drv_ix], product[drv_ix],		rx_endpoint[drv_ix], rx_padding[drv_ix],		tx_endpoint[drv_ix], tx_padding[drv_ix]);	if (!rx_ep_present && !tx_ep_present) {		usb_dbg(usbatm_instance, "%s: intf #%d has neither rx (%#x) nor tx (%#x) endpoint\n",			__func__, intf->altsetting->desc.bInterfaceNumber,			rx_endpoint[drv_ix], tx_endpoint[drv_ix]);		return -ENODEV;	}	if (rx_ep_present && tx_ep_present)		return 0;	for(i = 0; i < usb_dev->actconfig->desc.bNumInterfaces; i++) {		struct usb_interface *cur_if = usb_dev->actconfig->interface[i];		if (cur_if != intf && usb_intf_has_ep(cur_if, searched_ep)) {			ret = usb_driver_claim_interface(&xusbatm_usb_driver,							 cur_if, usbatm_instance);			if (!ret)				usb_err(usbatm_instance, "%s: failed to claim interface #%d (%d)\n",					__func__, cur_if->altsetting->desc.bInterfaceNumber, ret);			return ret;		}	}	usb_err(usbatm_instance, "%s: no interface has endpoint %#x\n",		__func__, searched_ep);	return -ENODEV;}static void xusbatm_unbind(struct usbatm_data *usbatm_instance,			   struct usb_interface *intf){	struct usb_device *usb_dev = interface_to_usbdev(intf);	int i;	usb_dbg(usbatm_instance, "%s entered\n", __func__);	for(i = 0; i < usb_dev->actconfig->desc.bNumInterfaces; i++) {		struct usb_interface *cur_if = usb_dev->actconfig->interface[i];		usb_set_intfdata(cur_if, NULL);		usb_driver_release_interface(&xusbatm_usb_driver, cur_if);	}}static int xusbatm_atm_start(struct usbatm_data *usbatm_instance,			     struct atm_dev *atm_dev){	atm_dbg(usbatm_instance, "%s entered\n", __func__);	/* use random MAC as we've no way to get it from the device */	random_ether_addr(atm_dev->esi);	return 0;}static int xusbatm_usb_probe(struct usb_interface *intf,			     const struct usb_device_id *id){	return usbatm_usb_probe(intf, id,				xusbatm_drivers + (id - xusbatm_usb_ids));}static struct usb_driver xusbatm_usb_driver = {	.owner		= THIS_MODULE,	.name		= xusbatm_driver_name,	.probe		= xusbatm_usb_probe,	.disconnect	= usbatm_usb_disconnect,	.id_table	= xusbatm_usb_ids};static int __init xusbatm_init(void){	int i;	dbg("xusbatm_init");	if (!num_vendor ||	    num_vendor != num_product ||	    num_vendor != num_rx_endpoint ||	    num_vendor != num_tx_endpoint) {		warn("malformed module parameters");		return -EINVAL;	}	for (i = 0; i < num_vendor; i++) {		xusbatm_usb_ids[i].match_flags	= USB_DEVICE_ID_MATCH_DEVICE;		xusbatm_usb_ids[i].idVendor	= vendor[i];		xusbatm_usb_ids[i].idProduct	= product[i];		xusbatm_drivers[i].owner	= THIS_MODULE;		xusbatm_drivers[i].driver_name	= xusbatm_driver_name;		xusbatm_drivers[i].bind		= xusbatm_bind;		xusbatm_drivers[i].unbind	= xusbatm_unbind;		xusbatm_drivers[i].atm_start	= xusbatm_atm_start;		xusbatm_drivers[i].in		= rx_endpoint[i];		xusbatm_drivers[i].out		= tx_endpoint[i];		xusbatm_drivers[i].rx_padding	= rx_padding[i];		xusbatm_drivers[i].tx_padding	= tx_padding[i];	}	return usb_register(&xusbatm_usb_driver);}module_init(xusbatm_init);static void __exit xusbatm_exit(void){	dbg("xusbatm_exit entered");	usb_deregister(&xusbatm_usb_driver);}module_exit(xusbatm_exit);MODULE_AUTHOR("Roman Kagan, Duncan Sands");MODULE_DESCRIPTION("Driver for USB ADSL modems initialized in userspace");MODULE_LICENSE("GPL");MODULE_VERSION("0.1");