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path: root/drivers/usb/atm/xusbatm.c
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Diffstat (limited to 'drivers/usb/atm/xusbatm.c')
-rw-r--r--drivers/usb/atm/xusbatm.c196
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");