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/******************************************************************************
* 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,
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_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, "%s: binding driver %d: vendor %04x product %04x"
" rx: ep %02x padd %d tx: ep %02x 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, "%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);
if (!ret)
usb_err(usbatm, "%s: failed to claim interface #%d (%d)\n",
__func__, cur_if->altsetting->desc.bInterfaceNumber, ret);
return ret;
}
}
usb_err(usbatm, "%s: no interface has endpoint %#x\n",
__func__, searched_ep);
return -ENODEV;
}
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_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,
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++) {
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].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");
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