linux/drivers/usb/atm/xusbatm.c
Duncan Sands 80aae7a17a [PATCH] USBATM: allow isochronous transfer
While the usbatm core has had some support for using isoc urbs
for some time, there was no way for users to turn it on.  While
use of isoc transfer should still be considered experimental, it
now works well enough to let users turn it on.  Minidrivers signal
to the core that they want to use isoc transfer by setting the new
UDSL_USE_ISOC flag.  The speedtch minidriver gets a new module
parameter enable_isoc (defaults to false), plus some logic that
checks for the existence of an isoc receive endpoint (not all
speedtouch modems have one).

Signed-off-by: Duncan Sands <baldrick@free.fr>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2006-01-31 17:23:40 -08:00

234 lines
7.7 KiB
C

/******************************************************************************
* 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)");
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");