/****************************************************************************** * 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 = { .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");