/****************************************************************************** *  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/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 unsigned 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)");XUSBATM_PARM(rx_altsetting, unsigned char, byte, "rx altsetting (default 0)");XUSBATM_PARM(tx_altsetting, unsigned char, byte, "rx altsetting (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 struct usb_interface *xusbatm_find_intf (struct usb_device *usb_dev, int altsetting, u8 ep){	struct usb_host_interface *alt;	struct usb_interface *intf;	int i, j;	for(i = 0; i < usb_dev->actconfig->desc.bNumInterfaces; i++)		if ((intf = usb_dev->actconfig->interface[i]) && (alt = usb_altnum_to_altsetting(intf, altsetting)))			for (j = 0; j < alt->desc.bNumEndpoints; j++)				if (alt->endpoint[j].desc.bEndpointAddress == ep)					return intf;	return NULL;}static int xusbatm_capture_intf (struct usbatm_data *usbatm, struct usb_device *usb_dev,		struct usb_interface *intf, int altsetting, int claim){	int ifnum = intf->altsetting->desc.bInterfaceNumber;	int ret;	if (claim && (ret = usb_driver_claim_interface(&xusbatm_usb_driver, intf, usbatm))) {		usb_err(usbatm, "%s: failed to claim interface %2d (%d)!\n", __func__, ifnum, ret);		return ret;	}	if ((ret = usb_set_interface(usb_dev, ifnum, altsetting))) {		usb_err(usbatm, "%s: altsetting %2d for interface %2d failed (%d)!\n", __func__, altsetting, ifnum, ret);		return ret;	}	return 0;}static void xusbatm_release_intf (struct usb_device *usb_dev, struct usb_interface *intf, int claimed){	if (claimed) {		usb_set_intfdata(intf, NULL);		usb_driver_release_interface(&xusbatm_usb_driver, intf);	}}static int xusbatm_bind(struct usbatm_data *usbatm,			struct usb_interface *intf, const struct usb_device_id *id){	struct usb_device *usb_dev = interface_to_usbdev(intf);	int drv_ix = id - xusbatm_usb_ids;	int rx_alt = rx_altsetting[drv_ix];	int tx_alt = tx_altsetting[drv_ix];	struct usb_interface *rx_intf = xusbatm_find_intf(usb_dev, rx_alt, rx_endpoint[drv_ix]);	struct usb_interface *tx_intf = xusbatm_find_intf(usb_dev, tx_alt, tx_endpoint[drv_ix]);	int ret;	usb_dbg(usbatm, "%s: binding driver %d: vendor %04x product %04x"		" rx: ep %02x padd %d alt %2d tx: ep %02x padd %d alt %2d\n",		__func__, drv_ix, vendor[drv_ix], product[drv_ix],		rx_endpoint[drv_ix], rx_padding[drv_ix], rx_alt,		tx_endpoint[drv_ix], tx_padding[drv_ix], tx_alt);	if (!rx_intf || !tx_intf) {		if (!rx_intf)			usb_dbg(usbatm, "%s: no interface contains endpoint %02x in altsetting %2d\n",				__func__, rx_endpoint[drv_ix], rx_alt);		if (!tx_intf)			usb_dbg(usbatm, "%s: no interface contains endpoint %02x in altsetting %2d\n",				__func__, tx_endpoint[drv_ix], tx_alt);		return -ENODEV;	}	if ((rx_intf != intf) && (tx_intf != intf))		return -ENODEV;	if ((rx_intf == tx_intf) && (rx_alt != tx_alt)) {		usb_err(usbatm, "%s: altsettings clash on interface %2d (%2d vs %2d)!\n", __func__,				rx_intf->altsetting->desc.bInterfaceNumber, rx_alt, tx_alt);		return -EINVAL;	}	usb_dbg(usbatm, "%s: rx If#=%2d; tx If#=%2d\n", __func__,			rx_intf->altsetting->desc.bInterfaceNumber,			tx_intf->altsetting->desc.bInterfaceNumber);	if ((ret = xusbatm_capture_intf(usbatm, usb_dev, rx_intf, rx_alt, rx_intf != intf)))		return ret;	if ((tx_intf != rx_intf) && (ret = xusbatm_capture_intf(usbatm, usb_dev, tx_intf, tx_alt, tx_intf != intf))) {		xusbatm_release_intf(usb_dev, rx_intf, rx_intf != intf);		return ret;	}	return 0;}static void xusbatm_unbind(struct usbatm_data *usbatm,			   struct usb_interface *intf){	struct usb_device *usb_dev = interface_to_usbdev(intf);	int i;	usb_dbg(usbatm, "%s entered\n", __func__);	for(i = 0; i < usb_dev->actconfig->desc.bNumInterfaces; i++) {		struct usb_interface *cur_intf = usb_dev->actconfig->interface[i];		if (cur_intf && (usb_get_intfdata(cur_intf) == usbatm)) {			usb_set_intfdata(cur_intf, NULL);			usb_driver_release_interface(&xusbatm_usb_driver, cur_intf);		}	}}static int xusbatm_atm_start(struct usbatm_data *usbatm,			     struct atm_dev *atm_dev){	atm_dbg(usbatm, "%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 = {	.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++) {		rx_endpoint[i] |= USB_DIR_IN;		tx_endpoint[i] &= USB_ENDPOINT_NUMBER_MASK;		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].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].bulk_in	= rx_endpoint[i];		xusbatm_drivers[i].bulk_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");