197 lines
6.3 KiB
C
197 lines
6.3 KiB
C
/******************************************************************************
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* xusbatm.c - dumb usbatm-based driver for modems initialized in userspace
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*
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* Copyright (C) 2005 Duncan Sands, Roman Kagan (rkagan % mail ! ru)
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the Free
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* Software Foundation; either version 2 of the License, or (at your option)
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* any later version.
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*
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* This program is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License along with
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* this program; if not, write to the Free Software Foundation, Inc., 59
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* Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*
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******************************************************************************/
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#include <linux/module.h>
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#include <linux/netdevice.h> /* FIXME: required by linux/etherdevice.h */
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#include <linux/etherdevice.h> /* for random_ether_addr() */
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#include "usbatm.h"
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#define XUSBATM_DRIVERS_MAX 8
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#define XUSBATM_PARM(name, type, parmtype, desc) \
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static type name[XUSBATM_DRIVERS_MAX]; \
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static int num_##name; \
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module_param_array(name, parmtype, &num_##name, 0444); \
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MODULE_PARM_DESC(name, desc)
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XUSBATM_PARM(vendor, unsigned short, ushort, "USB device vendor");
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XUSBATM_PARM(product, unsigned short, ushort, "USB device product");
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XUSBATM_PARM(rx_endpoint, unsigned char, byte, "rx endpoint number");
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XUSBATM_PARM(tx_endpoint, unsigned char, byte, "tx endpoint number");
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XUSBATM_PARM(rx_padding, unsigned char, byte, "rx padding (default 0)");
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XUSBATM_PARM(tx_padding, unsigned char, byte, "tx padding (default 0)");
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static const char xusbatm_driver_name[] = "xusbatm";
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static struct usbatm_driver xusbatm_drivers[XUSBATM_DRIVERS_MAX];
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static struct usb_device_id xusbatm_usb_ids[XUSBATM_DRIVERS_MAX + 1];
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static struct usb_driver xusbatm_usb_driver;
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static int usb_intf_has_ep(const struct usb_interface *intf, u8 ep)
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{
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int i, j;
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for (i = 0; i < intf->num_altsetting; i++) {
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struct usb_host_interface *alt = intf->altsetting;
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for (j = 0; j < alt->desc.bNumEndpoints; j++)
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if ((alt->endpoint[i].desc.bEndpointAddress & USB_ENDPOINT_NUMBER_MASK) == ep)
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return 1;
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}
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return 0;
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}
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static int xusbatm_bind(struct usbatm_data *usbatm_instance,
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struct usb_interface *intf, const struct usb_device_id *id,
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int *need_heavy_init)
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{
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struct usb_device *usb_dev = interface_to_usbdev(intf);
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int drv_ix = id - xusbatm_usb_ids;
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int rx_ep_present = usb_intf_has_ep(intf, rx_endpoint[drv_ix]);
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int tx_ep_present = usb_intf_has_ep(intf, tx_endpoint[drv_ix]);
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u8 searched_ep = rx_ep_present ? tx_endpoint[drv_ix] : rx_endpoint[drv_ix];
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int i, ret;
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usb_dbg(usbatm_instance, "%s: binding driver %d: vendor %#x product %#x"
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" rx: ep %#x padd %d tx: ep %#x padd %d\n",
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__func__, drv_ix, vendor[drv_ix], product[drv_ix],
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rx_endpoint[drv_ix], rx_padding[drv_ix],
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tx_endpoint[drv_ix], tx_padding[drv_ix]);
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if (!rx_ep_present && !tx_ep_present) {
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usb_dbg(usbatm_instance, "%s: intf #%d has neither rx (%#x) nor tx (%#x) endpoint\n",
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__func__, intf->altsetting->desc.bInterfaceNumber,
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rx_endpoint[drv_ix], tx_endpoint[drv_ix]);
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return -ENODEV;
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}
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if (rx_ep_present && tx_ep_present)
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return 0;
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for(i = 0; i < usb_dev->actconfig->desc.bNumInterfaces; i++) {
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struct usb_interface *cur_if = usb_dev->actconfig->interface[i];
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if (cur_if != intf && usb_intf_has_ep(cur_if, searched_ep)) {
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ret = usb_driver_claim_interface(&xusbatm_usb_driver,
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cur_if, usbatm_instance);
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if (!ret)
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usb_err(usbatm_instance, "%s: failed to claim interface #%d (%d)\n",
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__func__, cur_if->altsetting->desc.bInterfaceNumber, ret);
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return ret;
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}
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}
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usb_err(usbatm_instance, "%s: no interface has endpoint %#x\n",
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__func__, searched_ep);
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return -ENODEV;
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}
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static void xusbatm_unbind(struct usbatm_data *usbatm_instance,
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struct usb_interface *intf)
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{
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struct usb_device *usb_dev = interface_to_usbdev(intf);
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int i;
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usb_dbg(usbatm_instance, "%s entered\n", __func__);
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for(i = 0; i < usb_dev->actconfig->desc.bNumInterfaces; i++) {
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struct usb_interface *cur_if = usb_dev->actconfig->interface[i];
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usb_set_intfdata(cur_if, NULL);
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usb_driver_release_interface(&xusbatm_usb_driver, cur_if);
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}
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}
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static int xusbatm_atm_start(struct usbatm_data *usbatm_instance,
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struct atm_dev *atm_dev)
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{
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atm_dbg(usbatm_instance, "%s entered\n", __func__);
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/* use random MAC as we've no way to get it from the device */
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random_ether_addr(atm_dev->esi);
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return 0;
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}
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static int xusbatm_usb_probe(struct usb_interface *intf,
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const struct usb_device_id *id)
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{
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return usbatm_usb_probe(intf, id,
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xusbatm_drivers + (id - xusbatm_usb_ids));
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}
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static struct usb_driver xusbatm_usb_driver = {
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.owner = THIS_MODULE,
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.name = xusbatm_driver_name,
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.probe = xusbatm_usb_probe,
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.disconnect = usbatm_usb_disconnect,
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.id_table = xusbatm_usb_ids
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};
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static int __init xusbatm_init(void)
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{
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int i;
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dbg("xusbatm_init");
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if (!num_vendor ||
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num_vendor != num_product ||
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num_vendor != num_rx_endpoint ||
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num_vendor != num_tx_endpoint) {
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warn("malformed module parameters");
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return -EINVAL;
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}
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for (i = 0; i < num_vendor; i++) {
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xusbatm_usb_ids[i].match_flags = USB_DEVICE_ID_MATCH_DEVICE;
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xusbatm_usb_ids[i].idVendor = vendor[i];
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xusbatm_usb_ids[i].idProduct = product[i];
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xusbatm_drivers[i].owner = THIS_MODULE;
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xusbatm_drivers[i].driver_name = xusbatm_driver_name;
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xusbatm_drivers[i].bind = xusbatm_bind;
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xusbatm_drivers[i].unbind = xusbatm_unbind;
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xusbatm_drivers[i].atm_start = xusbatm_atm_start;
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xusbatm_drivers[i].in = rx_endpoint[i];
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xusbatm_drivers[i].out = tx_endpoint[i];
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xusbatm_drivers[i].rx_padding = rx_padding[i];
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xusbatm_drivers[i].tx_padding = tx_padding[i];
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}
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return usb_register(&xusbatm_usb_driver);
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}
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module_init(xusbatm_init);
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static void __exit xusbatm_exit(void)
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{
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dbg("xusbatm_exit entered");
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usb_deregister(&xusbatm_usb_driver);
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}
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module_exit(xusbatm_exit);
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MODULE_AUTHOR("Roman Kagan, Duncan Sands");
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MODULE_DESCRIPTION("Driver for USB ADSL modems initialized in userspace");
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MODULE_LICENSE("GPL");
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MODULE_VERSION("0.1");
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