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 000000000000..7fe7fb484d10
--- /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");