diff options
Diffstat (limited to 'drivers/usb/atm/xusbatm.c')
| -rw-r--r-- | drivers/usb/atm/xusbatm.c | 196 |
1 files changed, 196 insertions, 0 deletions
diff --git a/drivers/usb/atm/xusbatm.c b/drivers/usb/atm/xusbatm.c new file mode 100644 index 0000000..7fe7fb4 --- /dev/null +++ b/drivers/usb/atm/xusbatm.c @@ -0,0 +1,196 @@ +/****************************************************************************** + * 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 = { + .owner = THIS_MODULE, + .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"); |