--- /dev/null
+/******************************************************************************
+ * 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/etherdevice.h> /* for eth_random_addr() */
+
+#include "usbatm.h"
+
+
+#define XUSBATM_DRIVERS_MAX 8
+
+#define XUSBATM_PARM(name, type, parmtype, desc) \
+ static type name[XUSBATM_DRIVERS_MAX]; \
+ static unsigned 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 */
+ eth_random_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;
+
+ if (!num_vendor ||
+ num_vendor != num_product ||
+ num_vendor != num_rx_endpoint ||
+ num_vendor != num_tx_endpoint) {
+ printk(KERN_WARNING "xusbatm: malformed module parameters\n");
+ 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)
+{
+ 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");
Code Review / kvmfornfv.git / blobdiff