1 /* CAN driver for Geschwister Schneider USB/CAN devices.
3 * Copyright (C) 2013 Geschwister Schneider Technologie-,
4 * Entwicklungs- und Vertriebs UG (Haftungsbeschränkt).
6 * Many thanks to all socketcan devs!
8 * This program is free software; you can redistribute it and/or modify it
9 * under the terms of the GNU General Public License as published
10 * by the Free Software Foundation; version 2 of the License.
12 * This program is distributed in the hope that it will be useful, but
13 * WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * General Public License for more details.
18 #include <linux/init.h>
19 #include <linux/signal.h>
20 #include <linux/module.h>
21 #include <linux/netdevice.h>
22 #include <linux/usb.h>
24 #include <linux/can.h>
25 #include <linux/can/dev.h>
26 #include <linux/can/error.h>
28 /* Device specific constants */
29 #define USB_GSUSB_1_VENDOR_ID 0x1d50
30 #define USB_GSUSB_1_PRODUCT_ID 0x606f
32 #define GSUSB_ENDPOINT_IN 1
33 #define GSUSB_ENDPOINT_OUT 2
35 /* Device specific constants */
37 GS_USB_BREQ_HOST_FORMAT = 0,
38 GS_USB_BREQ_BITTIMING,
42 GS_USB_BREQ_DEVICE_CONFIG
46 /* reset a channel. turns it off */
47 GS_CAN_MODE_RESET = 0,
48 /* starts a channel */
53 GS_CAN_STATE_ERROR_ACTIVE = 0,
54 GS_CAN_STATE_ERROR_WARNING,
55 GS_CAN_STATE_ERROR_PASSIVE,
61 /* data types passed between host and device */
62 struct gs_host_config {
65 /* All data exchanged between host and device is exchanged in host byte order,
66 * thanks to the struct gs_host_config byte_order member, which is sent first
67 * to indicate the desired byte order.
70 struct gs_device_config {
79 #define GS_CAN_MODE_NORMAL 0
80 #define GS_CAN_MODE_LISTEN_ONLY (1<<0)
81 #define GS_CAN_MODE_LOOP_BACK (1<<1)
82 #define GS_CAN_MODE_TRIPLE_SAMPLE (1<<2)
83 #define GS_CAN_MODE_ONE_SHOT (1<<3)
85 struct gs_device_mode {
90 struct gs_device_state {
96 struct gs_device_bittiming {
104 #define GS_CAN_FEATURE_LISTEN_ONLY (1<<0)
105 #define GS_CAN_FEATURE_LOOP_BACK (1<<1)
106 #define GS_CAN_FEATURE_TRIPLE_SAMPLE (1<<2)
107 #define GS_CAN_FEATURE_ONE_SHOT (1<<3)
109 struct gs_device_bt_const {
122 #define GS_CAN_FLAG_OVERFLOW 1
124 struct gs_host_frame {
135 /* The GS USB devices make use of the same flags and masks as in
136 * linux/can.h and linux/can/error.h, and no additional mapping is necessary.
139 /* Only send a max of GS_MAX_TX_URBS frames per channel at a time. */
140 #define GS_MAX_TX_URBS 10
141 /* Only launch a max of GS_MAX_RX_URBS usb requests at a time. */
142 #define GS_MAX_RX_URBS 30
143 /* Maximum number of interfaces the driver supports per device.
144 * Current hardware only supports 2 interfaces. The future may vary.
146 #define GS_MAX_INTF 2
148 struct gs_tx_context {
150 unsigned int echo_id;
154 struct can_priv can; /* must be the first member */
156 struct gs_usb *parent;
158 struct net_device *netdev;
159 struct usb_device *udev;
160 struct usb_interface *iface;
162 struct can_bittiming_const bt_const;
163 unsigned int channel; /* channel number */
165 /* This lock prevents a race condition between xmit and receive. */
166 spinlock_t tx_ctx_lock;
167 struct gs_tx_context tx_context[GS_MAX_TX_URBS];
169 struct usb_anchor tx_submitted;
170 atomic_t active_tx_urbs;
173 /* usb interface struct */
175 struct gs_can *canch[GS_MAX_INTF];
176 struct usb_anchor rx_submitted;
177 atomic_t active_channels;
178 struct usb_device *udev;
181 /* 'allocate' a tx context.
182 * returns a valid tx context or NULL if there is no space.
184 static struct gs_tx_context *gs_alloc_tx_context(struct gs_can *dev)
189 spin_lock_irqsave(&dev->tx_ctx_lock, flags);
191 for (; i < GS_MAX_TX_URBS; i++) {
192 if (dev->tx_context[i].echo_id == GS_MAX_TX_URBS) {
193 dev->tx_context[i].echo_id = i;
194 spin_unlock_irqrestore(&dev->tx_ctx_lock, flags);
195 return &dev->tx_context[i];
199 spin_unlock_irqrestore(&dev->tx_ctx_lock, flags);
203 /* releases a tx context
205 static void gs_free_tx_context(struct gs_tx_context *txc)
207 txc->echo_id = GS_MAX_TX_URBS;
210 /* Get a tx context by id.
212 static struct gs_tx_context *gs_get_tx_context(struct gs_can *dev, unsigned int id)
216 if (id < GS_MAX_TX_URBS) {
217 spin_lock_irqsave(&dev->tx_ctx_lock, flags);
218 if (dev->tx_context[id].echo_id == id) {
219 spin_unlock_irqrestore(&dev->tx_ctx_lock, flags);
220 return &dev->tx_context[id];
222 spin_unlock_irqrestore(&dev->tx_ctx_lock, flags);
227 static int gs_cmd_reset(struct gs_usb *gsusb, struct gs_can *gsdev)
229 struct gs_device_mode *dm;
230 struct usb_interface *intf = gsdev->iface;
233 dm = kzalloc(sizeof(*dm), GFP_KERNEL);
237 dm->mode = GS_CAN_MODE_RESET;
239 rc = usb_control_msg(interface_to_usbdev(intf),
240 usb_sndctrlpipe(interface_to_usbdev(intf), 0),
242 USB_DIR_OUT|USB_TYPE_VENDOR|USB_RECIP_INTERFACE,
252 static void gs_update_state(struct gs_can *dev, struct can_frame *cf)
254 struct can_device_stats *can_stats = &dev->can.can_stats;
256 if (cf->can_id & CAN_ERR_RESTARTED) {
257 dev->can.state = CAN_STATE_ERROR_ACTIVE;
258 can_stats->restarts++;
259 } else if (cf->can_id & CAN_ERR_BUSOFF) {
260 dev->can.state = CAN_STATE_BUS_OFF;
261 can_stats->bus_off++;
262 } else if (cf->can_id & CAN_ERR_CRTL) {
263 if ((cf->data[1] & CAN_ERR_CRTL_TX_WARNING) ||
264 (cf->data[1] & CAN_ERR_CRTL_RX_WARNING)) {
265 dev->can.state = CAN_STATE_ERROR_WARNING;
266 can_stats->error_warning++;
267 } else if ((cf->data[1] & CAN_ERR_CRTL_TX_PASSIVE) ||
268 (cf->data[1] & CAN_ERR_CRTL_RX_PASSIVE)) {
269 dev->can.state = CAN_STATE_ERROR_PASSIVE;
270 can_stats->error_passive++;
272 dev->can.state = CAN_STATE_ERROR_ACTIVE;
277 static void gs_usb_receive_bulk_callback(struct urb *urb)
279 struct gs_usb *usbcan = urb->context;
281 struct net_device *netdev;
283 struct net_device_stats *stats;
284 struct gs_host_frame *hf = urb->transfer_buffer;
285 struct gs_tx_context *txc;
286 struct can_frame *cf;
291 switch (urb->status) {
292 case 0: /* success */
298 /* do not resubmit aborted urbs. eg: when device goes down */
302 /* device reports out of range channel id */
303 if (hf->channel >= GS_MAX_INTF)
306 dev = usbcan->canch[hf->channel];
308 netdev = dev->netdev;
309 stats = &netdev->stats;
311 if (!netif_device_present(netdev))
314 if (hf->echo_id == -1) { /* normal rx */
315 skb = alloc_can_skb(dev->netdev, &cf);
319 cf->can_id = hf->can_id;
321 cf->can_dlc = get_can_dlc(hf->can_dlc);
322 memcpy(cf->data, hf->data, 8);
324 /* ERROR frames tell us information about the controller */
325 if (hf->can_id & CAN_ERR_FLAG)
326 gs_update_state(dev, cf);
328 netdev->stats.rx_packets++;
329 netdev->stats.rx_bytes += hf->can_dlc;
332 } else { /* echo_id == hf->echo_id */
333 if (hf->echo_id >= GS_MAX_TX_URBS) {
335 "Unexpected out of range echo id %d\n",
340 netdev->stats.tx_packets++;
341 netdev->stats.tx_bytes += hf->can_dlc;
343 txc = gs_get_tx_context(dev, hf->echo_id);
345 /* bad devices send bad echo_ids. */
348 "Unexpected unused echo id %d\n",
353 can_get_echo_skb(netdev, hf->echo_id);
355 gs_free_tx_context(txc);
357 netif_wake_queue(netdev);
360 if (hf->flags & GS_CAN_FLAG_OVERFLOW) {
361 skb = alloc_can_err_skb(netdev, &cf);
365 cf->can_id |= CAN_ERR_CRTL;
366 cf->can_dlc = CAN_ERR_DLC;
367 cf->data[1] = CAN_ERR_CRTL_RX_OVERFLOW;
368 stats->rx_over_errors++;
374 usb_fill_bulk_urb(urb,
376 usb_rcvbulkpipe(usbcan->udev, GSUSB_ENDPOINT_IN),
378 sizeof(struct gs_host_frame),
379 gs_usb_receive_bulk_callback,
383 rc = usb_submit_urb(urb, GFP_ATOMIC);
385 /* USB failure take down all interfaces */
387 for (rc = 0; rc < GS_MAX_INTF; rc++) {
388 if (usbcan->canch[rc])
389 netif_device_detach(usbcan->canch[rc]->netdev);
394 static int gs_usb_set_bittiming(struct net_device *netdev)
396 struct gs_can *dev = netdev_priv(netdev);
397 struct can_bittiming *bt = &dev->can.bittiming;
398 struct usb_interface *intf = dev->iface;
400 struct gs_device_bittiming *dbt;
402 dbt = kmalloc(sizeof(*dbt), GFP_KERNEL);
406 dbt->prop_seg = bt->prop_seg;
407 dbt->phase_seg1 = bt->phase_seg1;
408 dbt->phase_seg2 = bt->phase_seg2;
412 /* request bit timings */
413 rc = usb_control_msg(interface_to_usbdev(intf),
414 usb_sndctrlpipe(interface_to_usbdev(intf), 0),
415 GS_USB_BREQ_BITTIMING,
416 USB_DIR_OUT|USB_TYPE_VENDOR|USB_RECIP_INTERFACE,
426 dev_err(netdev->dev.parent, "Couldn't set bittimings (err=%d)",
432 static void gs_usb_xmit_callback(struct urb *urb)
434 struct gs_tx_context *txc = urb->context;
435 struct gs_can *dev = txc->dev;
436 struct net_device *netdev = dev->netdev;
439 netdev_info(netdev, "usb xmit fail %d\n", txc->echo_id);
441 usb_free_coherent(urb->dev,
442 urb->transfer_buffer_length,
443 urb->transfer_buffer,
446 atomic_dec(&dev->active_tx_urbs);
448 if (!netif_device_present(netdev))
451 if (netif_queue_stopped(netdev))
452 netif_wake_queue(netdev);
455 static netdev_tx_t gs_can_start_xmit(struct sk_buff *skb, struct net_device *netdev)
457 struct gs_can *dev = netdev_priv(netdev);
458 struct net_device_stats *stats = &dev->netdev->stats;
460 struct gs_host_frame *hf;
461 struct can_frame *cf;
464 struct gs_tx_context *txc;
466 if (can_dropped_invalid_skb(netdev, skb))
469 /* find an empty context to keep track of transmission */
470 txc = gs_alloc_tx_context(dev);
472 return NETDEV_TX_BUSY;
474 /* create a URB, and a buffer for it */
475 urb = usb_alloc_urb(0, GFP_ATOMIC);
477 netdev_err(netdev, "No memory left for URB\n");
481 hf = usb_alloc_coherent(dev->udev, sizeof(*hf), GFP_ATOMIC,
484 netdev_err(netdev, "No memory left for USB buffer\n");
490 if (idx >= GS_MAX_TX_URBS) {
491 netdev_err(netdev, "Invalid tx context %d\n", idx);
496 hf->channel = dev->channel;
498 cf = (struct can_frame *)skb->data;
500 hf->can_id = cf->can_id;
501 hf->can_dlc = cf->can_dlc;
502 memcpy(hf->data, cf->data, cf->can_dlc);
504 usb_fill_bulk_urb(urb, dev->udev,
505 usb_sndbulkpipe(dev->udev, GSUSB_ENDPOINT_OUT),
508 gs_usb_xmit_callback,
511 urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
512 usb_anchor_urb(urb, &dev->tx_submitted);
514 can_put_echo_skb(skb, netdev, idx);
516 atomic_inc(&dev->active_tx_urbs);
518 rc = usb_submit_urb(urb, GFP_ATOMIC);
519 if (unlikely(rc)) { /* usb send failed */
520 atomic_dec(&dev->active_tx_urbs);
522 can_free_echo_skb(netdev, idx);
523 gs_free_tx_context(txc);
525 usb_unanchor_urb(urb);
526 usb_free_coherent(dev->udev,
533 netif_device_detach(netdev);
535 netdev_err(netdev, "usb_submit failed (err=%d)\n", rc);
539 /* Slow down tx path */
540 if (atomic_read(&dev->active_tx_urbs) >= GS_MAX_TX_URBS)
541 netif_stop_queue(netdev);
544 /* let usb core take care of this urb */
550 usb_free_coherent(dev->udev,
558 gs_free_tx_context(txc);
564 static int gs_can_open(struct net_device *netdev)
566 struct gs_can *dev = netdev_priv(netdev);
567 struct gs_usb *parent = dev->parent;
569 struct gs_device_mode *dm;
572 rc = open_candev(netdev);
576 if (atomic_add_return(1, &parent->active_channels) == 1) {
577 for (i = 0; i < GS_MAX_RX_URBS; i++) {
582 urb = usb_alloc_urb(0, GFP_KERNEL);
585 "No memory left for URB\n");
589 /* alloc rx buffer */
590 buf = usb_alloc_coherent(dev->udev,
591 sizeof(struct gs_host_frame),
596 "No memory left for USB buffer\n");
601 /* fill, anchor, and submit rx urb */
602 usb_fill_bulk_urb(urb,
604 usb_rcvbulkpipe(dev->udev,
607 sizeof(struct gs_host_frame),
608 gs_usb_receive_bulk_callback,
610 urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
612 usb_anchor_urb(urb, &parent->rx_submitted);
614 rc = usb_submit_urb(urb, GFP_KERNEL);
617 netif_device_detach(dev->netdev);
620 "usb_submit failed (err=%d)\n",
623 usb_unanchor_urb(urb);
628 * USB core will take care of freeing it
634 dm = kmalloc(sizeof(*dm), GFP_KERNEL);
639 ctrlmode = dev->can.ctrlmode;
642 if (ctrlmode & CAN_CTRLMODE_LOOPBACK)
643 dm->flags |= GS_CAN_MODE_LOOP_BACK;
644 else if (ctrlmode & CAN_CTRLMODE_LISTENONLY)
645 dm->flags |= GS_CAN_MODE_LISTEN_ONLY;
647 /* Controller is not allowed to retry TX
648 * this mode is unavailable on atmels uc3c hardware
650 if (ctrlmode & CAN_CTRLMODE_ONE_SHOT)
651 dm->flags |= GS_CAN_MODE_ONE_SHOT;
653 if (ctrlmode & CAN_CTRLMODE_3_SAMPLES)
654 dm->flags |= GS_CAN_MODE_TRIPLE_SAMPLE;
656 /* finally start device */
657 dm->mode = GS_CAN_MODE_START;
658 rc = usb_control_msg(interface_to_usbdev(dev->iface),
659 usb_sndctrlpipe(interface_to_usbdev(dev->iface), 0),
661 USB_DIR_OUT|USB_TYPE_VENDOR|USB_RECIP_INTERFACE,
669 netdev_err(netdev, "Couldn't start device (err=%d)\n", rc);
676 dev->can.state = CAN_STATE_ERROR_ACTIVE;
678 if (!(dev->can.ctrlmode & CAN_CTRLMODE_LISTENONLY))
679 netif_start_queue(netdev);
684 static int gs_can_close(struct net_device *netdev)
687 struct gs_can *dev = netdev_priv(netdev);
688 struct gs_usb *parent = dev->parent;
690 netif_stop_queue(netdev);
693 if (atomic_dec_and_test(&parent->active_channels))
694 usb_kill_anchored_urbs(&parent->rx_submitted);
696 /* Stop sending URBs */
697 usb_kill_anchored_urbs(&dev->tx_submitted);
698 atomic_set(&dev->active_tx_urbs, 0);
700 /* reset the device */
701 rc = gs_cmd_reset(parent, dev);
703 netdev_warn(netdev, "Couldn't shutdown device (err=%d)", rc);
705 /* reset tx contexts */
706 for (rc = 0; rc < GS_MAX_TX_URBS; rc++) {
707 dev->tx_context[rc].dev = dev;
708 dev->tx_context[rc].echo_id = GS_MAX_TX_URBS;
711 /* close the netdev */
712 close_candev(netdev);
717 static const struct net_device_ops gs_usb_netdev_ops = {
718 .ndo_open = gs_can_open,
719 .ndo_stop = gs_can_close,
720 .ndo_start_xmit = gs_can_start_xmit,
721 .ndo_change_mtu = can_change_mtu,
724 static struct gs_can *gs_make_candev(unsigned int channel, struct usb_interface *intf)
727 struct net_device *netdev;
729 struct gs_device_bt_const *bt_const;
731 bt_const = kmalloc(sizeof(*bt_const), GFP_KERNEL);
733 return ERR_PTR(-ENOMEM);
735 /* fetch bit timing constants */
736 rc = usb_control_msg(interface_to_usbdev(intf),
737 usb_rcvctrlpipe(interface_to_usbdev(intf), 0),
738 GS_USB_BREQ_BT_CONST,
739 USB_DIR_IN|USB_TYPE_VENDOR|USB_RECIP_INTERFACE,
748 "Couldn't get bit timing const for channel (err=%d)\n",
755 netdev = alloc_candev(sizeof(struct gs_can), GS_MAX_TX_URBS);
757 dev_err(&intf->dev, "Couldn't allocate candev\n");
759 return ERR_PTR(-ENOMEM);
762 dev = netdev_priv(netdev);
764 netdev->netdev_ops = &gs_usb_netdev_ops;
766 netdev->flags |= IFF_ECHO; /* we support full roundtrip echo */
769 strcpy(dev->bt_const.name, "gs_usb");
770 dev->bt_const.tseg1_min = bt_const->tseg1_min;
771 dev->bt_const.tseg1_max = bt_const->tseg1_max;
772 dev->bt_const.tseg2_min = bt_const->tseg2_min;
773 dev->bt_const.tseg2_max = bt_const->tseg2_max;
774 dev->bt_const.sjw_max = bt_const->sjw_max;
775 dev->bt_const.brp_min = bt_const->brp_min;
776 dev->bt_const.brp_max = bt_const->brp_max;
777 dev->bt_const.brp_inc = bt_const->brp_inc;
779 dev->udev = interface_to_usbdev(intf);
781 dev->netdev = netdev;
782 dev->channel = channel;
784 init_usb_anchor(&dev->tx_submitted);
785 atomic_set(&dev->active_tx_urbs, 0);
786 spin_lock_init(&dev->tx_ctx_lock);
787 for (rc = 0; rc < GS_MAX_TX_URBS; rc++) {
788 dev->tx_context[rc].dev = dev;
789 dev->tx_context[rc].echo_id = GS_MAX_TX_URBS;
793 dev->can.state = CAN_STATE_STOPPED;
794 dev->can.clock.freq = bt_const->fclk_can;
795 dev->can.bittiming_const = &dev->bt_const;
796 dev->can.do_set_bittiming = gs_usb_set_bittiming;
798 dev->can.ctrlmode_supported = 0;
800 if (bt_const->feature & GS_CAN_FEATURE_LISTEN_ONLY)
801 dev->can.ctrlmode_supported |= CAN_CTRLMODE_LISTENONLY;
803 if (bt_const->feature & GS_CAN_FEATURE_LOOP_BACK)
804 dev->can.ctrlmode_supported |= CAN_CTRLMODE_LOOPBACK;
806 if (bt_const->feature & GS_CAN_FEATURE_TRIPLE_SAMPLE)
807 dev->can.ctrlmode_supported |= CAN_CTRLMODE_3_SAMPLES;
809 if (bt_const->feature & GS_CAN_FEATURE_ONE_SHOT)
810 dev->can.ctrlmode_supported |= CAN_CTRLMODE_ONE_SHOT;
814 SET_NETDEV_DEV(netdev, &intf->dev);
816 rc = register_candev(dev->netdev);
818 free_candev(dev->netdev);
819 dev_err(&intf->dev, "Couldn't register candev (err=%d)\n", rc);
826 static void gs_destroy_candev(struct gs_can *dev)
828 unregister_candev(dev->netdev);
829 free_candev(dev->netdev);
830 usb_kill_anchored_urbs(&dev->tx_submitted);
834 static int gs_usb_probe(struct usb_interface *intf, const struct usb_device_id *id)
838 unsigned int icount, i;
839 struct gs_host_config *hconf;
840 struct gs_device_config *dconf;
842 hconf = kmalloc(sizeof(*hconf), GFP_KERNEL);
846 hconf->byte_order = 0x0000beef;
848 /* send host config */
849 rc = usb_control_msg(interface_to_usbdev(intf),
850 usb_sndctrlpipe(interface_to_usbdev(intf), 0),
851 GS_USB_BREQ_HOST_FORMAT,
852 USB_DIR_OUT|USB_TYPE_VENDOR|USB_RECIP_INTERFACE,
854 intf->altsetting[0].desc.bInterfaceNumber,
862 dev_err(&intf->dev, "Couldn't send data format (err=%d)\n",
867 dconf = kmalloc(sizeof(*dconf), GFP_KERNEL);
871 /* read device config */
872 rc = usb_control_msg(interface_to_usbdev(intf),
873 usb_rcvctrlpipe(interface_to_usbdev(intf), 0),
874 GS_USB_BREQ_DEVICE_CONFIG,
875 USB_DIR_IN|USB_TYPE_VENDOR|USB_RECIP_INTERFACE,
877 intf->altsetting[0].desc.bInterfaceNumber,
882 dev_err(&intf->dev, "Couldn't get device config: (err=%d)\n",
890 icount = dconf->icount+1;
894 dev_info(&intf->dev, "Configuring for %d interfaces\n", icount);
896 if (icount > GS_MAX_INTF) {
898 "Driver cannot handle more that %d CAN interfaces\n",
903 dev = kzalloc(sizeof(*dev), GFP_KERNEL);
906 init_usb_anchor(&dev->rx_submitted);
908 atomic_set(&dev->active_channels, 0);
910 usb_set_intfdata(intf, dev);
911 dev->udev = interface_to_usbdev(intf);
913 for (i = 0; i < icount; i++) {
914 dev->canch[i] = gs_make_candev(i, intf);
915 if (IS_ERR_OR_NULL(dev->canch[i])) {
916 /* on failure destroy previously created candevs */
918 for (i = 0; i < icount; i++) {
919 gs_destroy_candev(dev->canch[i]);
920 dev->canch[i] = NULL;
925 dev->canch[i]->parent = dev;
931 static void gs_usb_disconnect(struct usb_interface *intf)
934 struct gs_usb *dev = usb_get_intfdata(intf);
935 usb_set_intfdata(intf, NULL);
938 dev_err(&intf->dev, "Disconnect (nodata)\n");
942 for (i = 0; i < GS_MAX_INTF; i++) {
943 struct gs_can *can = dev->canch[i];
948 gs_destroy_candev(can);
951 usb_kill_anchored_urbs(&dev->rx_submitted);
954 static const struct usb_device_id gs_usb_table[] = {
955 {USB_DEVICE(USB_GSUSB_1_VENDOR_ID, USB_GSUSB_1_PRODUCT_ID)},
956 {} /* Terminating entry */
959 MODULE_DEVICE_TABLE(usb, gs_usb_table);
961 static struct usb_driver gs_usb_driver = {
963 .probe = gs_usb_probe,
964 .disconnect = gs_usb_disconnect,
965 .id_table = gs_usb_table,
968 module_usb_driver(gs_usb_driver);
970 MODULE_AUTHOR("Maximilian Schneider <mws@schneidersoft.net>");
972 "Socket CAN device driver for Geschwister Schneider Technologie-, "
973 "Entwicklungs- und Vertriebs UG. USB2.0 to CAN interfaces.");
974 MODULE_LICENSE("GPL v2");