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Commit | Line | Data |
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8e8e69d6 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
f155d9c0 MS |
2 | /* CAN driver for Geschwister Schneider USB/CAN devices |
3 | * and bytewerk.org candleLight USB CAN interfaces. | |
d08e973a | 4 | * |
f155d9c0 | 5 | * Copyright (C) 2013-2016 Geschwister Schneider Technologie-, |
d08e973a | 6 | * Entwicklungs- und Vertriebs UG (Haftungsbeschränkt). |
f155d9c0 | 7 | * Copyright (C) 2016 Hubert Denkmair |
d08e973a MS |
8 | * |
9 | * Many thanks to all socketcan devs! | |
d08e973a MS |
10 | */ |
11 | ||
cc69837f | 12 | #include <linux/ethtool.h> |
d08e973a MS |
13 | #include <linux/init.h> |
14 | #include <linux/signal.h> | |
15 | #include <linux/module.h> | |
16 | #include <linux/netdevice.h> | |
17 | #include <linux/usb.h> | |
18 | ||
19 | #include <linux/can.h> | |
20 | #include <linux/can/dev.h> | |
21 | #include <linux/can/error.h> | |
22 | ||
23 | /* Device specific constants */ | |
24 | #define USB_GSUSB_1_VENDOR_ID 0x1d50 | |
25 | #define USB_GSUSB_1_PRODUCT_ID 0x606f | |
26 | ||
f155d9c0 MS |
27 | #define USB_CANDLELIGHT_VENDOR_ID 0x1209 |
28 | #define USB_CANDLELIGHT_PRODUCT_ID 0x2323 | |
29 | ||
d08e973a MS |
30 | #define GSUSB_ENDPOINT_IN 1 |
31 | #define GSUSB_ENDPOINT_OUT 2 | |
32 | ||
33 | /* Device specific constants */ | |
34 | enum gs_usb_breq { | |
35 | GS_USB_BREQ_HOST_FORMAT = 0, | |
36 | GS_USB_BREQ_BITTIMING, | |
37 | GS_USB_BREQ_MODE, | |
38 | GS_USB_BREQ_BERR, | |
39 | GS_USB_BREQ_BT_CONST, | |
05ca5270 MS |
40 | GS_USB_BREQ_DEVICE_CONFIG, |
41 | GS_USB_BREQ_TIMESTAMP, | |
42 | GS_USB_BREQ_IDENTIFY, | |
d08e973a MS |
43 | }; |
44 | ||
45 | enum gs_can_mode { | |
46 | /* reset a channel. turns it off */ | |
47 | GS_CAN_MODE_RESET = 0, | |
48 | /* starts a channel */ | |
49 | GS_CAN_MODE_START | |
50 | }; | |
51 | ||
52 | enum gs_can_state { | |
53 | GS_CAN_STATE_ERROR_ACTIVE = 0, | |
54 | GS_CAN_STATE_ERROR_WARNING, | |
55 | GS_CAN_STATE_ERROR_PASSIVE, | |
56 | GS_CAN_STATE_BUS_OFF, | |
57 | GS_CAN_STATE_STOPPED, | |
58 | GS_CAN_STATE_SLEEPING | |
59 | }; | |
60 | ||
05ca5270 MS |
61 | enum gs_can_identify_mode { |
62 | GS_CAN_IDENTIFY_OFF = 0, | |
63 | GS_CAN_IDENTIFY_ON | |
64 | }; | |
65 | ||
d08e973a | 66 | /* data types passed between host and device */ |
4ba1cb39 MKB |
67 | |
68 | /* The firmware on the original USB2CAN by Geschwister Schneider | |
69 | * Technologie Entwicklungs- und Vertriebs UG exchanges all data | |
70 | * between the host and the device in host byte order. This is done | |
71 | * with the struct gs_host_config::byte_order member, which is sent | |
72 | * first to indicate the desired byte order. | |
73 | * | |
74 | * The widely used open source firmware candleLight doesn't support | |
75 | * this feature and exchanges the data in little endian byte order. | |
76 | */ | |
d08e973a | 77 | struct gs_host_config { |
4ba1cb39 | 78 | __le32 byte_order; |
d08e973a | 79 | } __packed; |
d08e973a MS |
80 | |
81 | struct gs_device_config { | |
82 | u8 reserved1; | |
83 | u8 reserved2; | |
84 | u8 reserved3; | |
85 | u8 icount; | |
4ba1cb39 MKB |
86 | __le32 sw_version; |
87 | __le32 hw_version; | |
d08e973a MS |
88 | } __packed; |
89 | ||
90 | #define GS_CAN_MODE_NORMAL 0 | |
9be95c91 MS |
91 | #define GS_CAN_MODE_LISTEN_ONLY BIT(0) |
92 | #define GS_CAN_MODE_LOOP_BACK BIT(1) | |
93 | #define GS_CAN_MODE_TRIPLE_SAMPLE BIT(2) | |
94 | #define GS_CAN_MODE_ONE_SHOT BIT(3) | |
d08e973a MS |
95 | |
96 | struct gs_device_mode { | |
4ba1cb39 MKB |
97 | __le32 mode; |
98 | __le32 flags; | |
d08e973a MS |
99 | } __packed; |
100 | ||
101 | struct gs_device_state { | |
4ba1cb39 MKB |
102 | __le32 state; |
103 | __le32 rxerr; | |
104 | __le32 txerr; | |
d08e973a MS |
105 | } __packed; |
106 | ||
107 | struct gs_device_bittiming { | |
4ba1cb39 MKB |
108 | __le32 prop_seg; |
109 | __le32 phase_seg1; | |
110 | __le32 phase_seg2; | |
111 | __le32 sjw; | |
112 | __le32 brp; | |
d08e973a MS |
113 | } __packed; |
114 | ||
05ca5270 | 115 | struct gs_identify_mode { |
4ba1cb39 | 116 | __le32 mode; |
05ca5270 MS |
117 | } __packed; |
118 | ||
9be95c91 MS |
119 | #define GS_CAN_FEATURE_LISTEN_ONLY BIT(0) |
120 | #define GS_CAN_FEATURE_LOOP_BACK BIT(1) | |
121 | #define GS_CAN_FEATURE_TRIPLE_SAMPLE BIT(2) | |
122 | #define GS_CAN_FEATURE_ONE_SHOT BIT(3) | |
05ca5270 MS |
123 | #define GS_CAN_FEATURE_HW_TIMESTAMP BIT(4) |
124 | #define GS_CAN_FEATURE_IDENTIFY BIT(5) | |
d08e973a MS |
125 | |
126 | struct gs_device_bt_const { | |
4ba1cb39 MKB |
127 | __le32 feature; |
128 | __le32 fclk_can; | |
129 | __le32 tseg1_min; | |
130 | __le32 tseg1_max; | |
131 | __le32 tseg2_min; | |
132 | __le32 tseg2_max; | |
133 | __le32 sjw_max; | |
134 | __le32 brp_min; | |
135 | __le32 brp_max; | |
136 | __le32 brp_inc; | |
d08e973a MS |
137 | } __packed; |
138 | ||
139 | #define GS_CAN_FLAG_OVERFLOW 1 | |
140 | ||
141 | struct gs_host_frame { | |
142 | u32 echo_id; | |
4ba1cb39 | 143 | __le32 can_id; |
d08e973a MS |
144 | |
145 | u8 can_dlc; | |
146 | u8 channel; | |
147 | u8 flags; | |
148 | u8 reserved; | |
149 | ||
150 | u8 data[8]; | |
151 | } __packed; | |
152 | /* The GS USB devices make use of the same flags and masks as in | |
153 | * linux/can.h and linux/can/error.h, and no additional mapping is necessary. | |
154 | */ | |
155 | ||
156 | /* Only send a max of GS_MAX_TX_URBS frames per channel at a time. */ | |
157 | #define GS_MAX_TX_URBS 10 | |
158 | /* Only launch a max of GS_MAX_RX_URBS usb requests at a time. */ | |
159 | #define GS_MAX_RX_URBS 30 | |
160 | /* Maximum number of interfaces the driver supports per device. | |
161 | * Current hardware only supports 2 interfaces. The future may vary. | |
162 | */ | |
163 | #define GS_MAX_INTF 2 | |
164 | ||
165 | struct gs_tx_context { | |
166 | struct gs_can *dev; | |
167 | unsigned int echo_id; | |
168 | }; | |
169 | ||
170 | struct gs_can { | |
171 | struct can_priv can; /* must be the first member */ | |
172 | ||
173 | struct gs_usb *parent; | |
174 | ||
175 | struct net_device *netdev; | |
176 | struct usb_device *udev; | |
177 | struct usb_interface *iface; | |
178 | ||
179 | struct can_bittiming_const bt_const; | |
180 | unsigned int channel; /* channel number */ | |
181 | ||
ae421e33 | 182 | /* This lock prevents a race condition between xmit and receive. */ |
d08e973a MS |
183 | spinlock_t tx_ctx_lock; |
184 | struct gs_tx_context tx_context[GS_MAX_TX_URBS]; | |
185 | ||
186 | struct usb_anchor tx_submitted; | |
187 | atomic_t active_tx_urbs; | |
188 | }; | |
189 | ||
190 | /* usb interface struct */ | |
191 | struct gs_usb { | |
192 | struct gs_can *canch[GS_MAX_INTF]; | |
193 | struct usb_anchor rx_submitted; | |
d08e973a | 194 | struct usb_device *udev; |
30236f2e | 195 | u8 active_channels; |
d08e973a MS |
196 | }; |
197 | ||
198 | /* 'allocate' a tx context. | |
199 | * returns a valid tx context or NULL if there is no space. | |
200 | */ | |
201 | static struct gs_tx_context *gs_alloc_tx_context(struct gs_can *dev) | |
202 | { | |
203 | int i = 0; | |
204 | unsigned long flags; | |
205 | ||
206 | spin_lock_irqsave(&dev->tx_ctx_lock, flags); | |
207 | ||
208 | for (; i < GS_MAX_TX_URBS; i++) { | |
209 | if (dev->tx_context[i].echo_id == GS_MAX_TX_URBS) { | |
210 | dev->tx_context[i].echo_id = i; | |
211 | spin_unlock_irqrestore(&dev->tx_ctx_lock, flags); | |
212 | return &dev->tx_context[i]; | |
213 | } | |
214 | } | |
215 | ||
216 | spin_unlock_irqrestore(&dev->tx_ctx_lock, flags); | |
217 | return NULL; | |
218 | } | |
219 | ||
220 | /* releases a tx context | |
221 | */ | |
222 | static void gs_free_tx_context(struct gs_tx_context *txc) | |
223 | { | |
224 | txc->echo_id = GS_MAX_TX_URBS; | |
225 | } | |
226 | ||
227 | /* Get a tx context by id. | |
228 | */ | |
9be95c91 MS |
229 | static struct gs_tx_context *gs_get_tx_context(struct gs_can *dev, |
230 | unsigned int id) | |
d08e973a MS |
231 | { |
232 | unsigned long flags; | |
233 | ||
234 | if (id < GS_MAX_TX_URBS) { | |
235 | spin_lock_irqsave(&dev->tx_ctx_lock, flags); | |
236 | if (dev->tx_context[id].echo_id == id) { | |
237 | spin_unlock_irqrestore(&dev->tx_ctx_lock, flags); | |
238 | return &dev->tx_context[id]; | |
239 | } | |
240 | spin_unlock_irqrestore(&dev->tx_ctx_lock, flags); | |
241 | } | |
242 | return NULL; | |
243 | } | |
244 | ||
dda8deb6 | 245 | static int gs_cmd_reset(struct gs_can *gsdev) |
d08e973a MS |
246 | { |
247 | struct gs_device_mode *dm; | |
248 | struct usb_interface *intf = gsdev->iface; | |
249 | int rc; | |
250 | ||
251 | dm = kzalloc(sizeof(*dm), GFP_KERNEL); | |
252 | if (!dm) | |
253 | return -ENOMEM; | |
254 | ||
255 | dm->mode = GS_CAN_MODE_RESET; | |
256 | ||
257 | rc = usb_control_msg(interface_to_usbdev(intf), | |
258 | usb_sndctrlpipe(interface_to_usbdev(intf), 0), | |
259 | GS_USB_BREQ_MODE, | |
540a27ae | 260 | USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_INTERFACE, |
d08e973a MS |
261 | gsdev->channel, |
262 | 0, | |
263 | dm, | |
264 | sizeof(*dm), | |
265 | 1000); | |
266 | ||
5cda3ee5 MKB |
267 | kfree(dm); |
268 | ||
d08e973a MS |
269 | return rc; |
270 | } | |
271 | ||
272 | static void gs_update_state(struct gs_can *dev, struct can_frame *cf) | |
273 | { | |
274 | struct can_device_stats *can_stats = &dev->can.can_stats; | |
275 | ||
276 | if (cf->can_id & CAN_ERR_RESTARTED) { | |
277 | dev->can.state = CAN_STATE_ERROR_ACTIVE; | |
278 | can_stats->restarts++; | |
279 | } else if (cf->can_id & CAN_ERR_BUSOFF) { | |
280 | dev->can.state = CAN_STATE_BUS_OFF; | |
281 | can_stats->bus_off++; | |
282 | } else if (cf->can_id & CAN_ERR_CRTL) { | |
283 | if ((cf->data[1] & CAN_ERR_CRTL_TX_WARNING) || | |
284 | (cf->data[1] & CAN_ERR_CRTL_RX_WARNING)) { | |
285 | dev->can.state = CAN_STATE_ERROR_WARNING; | |
286 | can_stats->error_warning++; | |
287 | } else if ((cf->data[1] & CAN_ERR_CRTL_TX_PASSIVE) || | |
288 | (cf->data[1] & CAN_ERR_CRTL_RX_PASSIVE)) { | |
289 | dev->can.state = CAN_STATE_ERROR_PASSIVE; | |
290 | can_stats->error_passive++; | |
291 | } else { | |
292 | dev->can.state = CAN_STATE_ERROR_ACTIVE; | |
293 | } | |
294 | } | |
295 | } | |
296 | ||
ae421e33 | 297 | static void gs_usb_receive_bulk_callback(struct urb *urb) |
d08e973a MS |
298 | { |
299 | struct gs_usb *usbcan = urb->context; | |
300 | struct gs_can *dev; | |
301 | struct net_device *netdev; | |
302 | int rc; | |
303 | struct net_device_stats *stats; | |
304 | struct gs_host_frame *hf = urb->transfer_buffer; | |
305 | struct gs_tx_context *txc; | |
306 | struct can_frame *cf; | |
307 | struct sk_buff *skb; | |
308 | ||
309 | BUG_ON(!usbcan); | |
310 | ||
311 | switch (urb->status) { | |
312 | case 0: /* success */ | |
313 | break; | |
314 | case -ENOENT: | |
315 | case -ESHUTDOWN: | |
316 | return; | |
317 | default: | |
318 | /* do not resubmit aborted urbs. eg: when device goes down */ | |
319 | return; | |
320 | } | |
321 | ||
322 | /* device reports out of range channel id */ | |
323 | if (hf->channel >= GS_MAX_INTF) | |
03329338 | 324 | goto device_detach; |
d08e973a MS |
325 | |
326 | dev = usbcan->canch[hf->channel]; | |
327 | ||
328 | netdev = dev->netdev; | |
329 | stats = &netdev->stats; | |
330 | ||
331 | if (!netif_device_present(netdev)) | |
332 | return; | |
333 | ||
334 | if (hf->echo_id == -1) { /* normal rx */ | |
335 | skb = alloc_can_skb(dev->netdev, &cf); | |
336 | if (!skb) | |
337 | return; | |
338 | ||
4ba1cb39 | 339 | cf->can_id = le32_to_cpu(hf->can_id); |
d08e973a | 340 | |
4c01fc87 | 341 | can_frame_set_cc_len(cf, hf->can_dlc, dev->can.ctrlmode); |
d08e973a MS |
342 | memcpy(cf->data, hf->data, 8); |
343 | ||
344 | /* ERROR frames tell us information about the controller */ | |
4ba1cb39 | 345 | if (le32_to_cpu(hf->can_id) & CAN_ERR_FLAG) |
d08e973a MS |
346 | gs_update_state(dev, cf); |
347 | ||
348 | netdev->stats.rx_packets++; | |
349 | netdev->stats.rx_bytes += hf->can_dlc; | |
350 | ||
351 | netif_rx(skb); | |
352 | } else { /* echo_id == hf->echo_id */ | |
353 | if (hf->echo_id >= GS_MAX_TX_URBS) { | |
354 | netdev_err(netdev, | |
355 | "Unexpected out of range echo id %d\n", | |
356 | hf->echo_id); | |
357 | goto resubmit_urb; | |
358 | } | |
359 | ||
360 | netdev->stats.tx_packets++; | |
361 | netdev->stats.tx_bytes += hf->can_dlc; | |
362 | ||
363 | txc = gs_get_tx_context(dev, hf->echo_id); | |
364 | ||
365 | /* bad devices send bad echo_ids. */ | |
366 | if (!txc) { | |
367 | netdev_err(netdev, | |
368 | "Unexpected unused echo id %d\n", | |
369 | hf->echo_id); | |
370 | goto resubmit_urb; | |
371 | } | |
372 | ||
9420e1d4 | 373 | can_get_echo_skb(netdev, hf->echo_id, NULL); |
d08e973a MS |
374 | |
375 | gs_free_tx_context(txc); | |
376 | ||
97819f94 WG |
377 | atomic_dec(&dev->active_tx_urbs); |
378 | ||
d08e973a MS |
379 | netif_wake_queue(netdev); |
380 | } | |
381 | ||
382 | if (hf->flags & GS_CAN_FLAG_OVERFLOW) { | |
383 | skb = alloc_can_err_skb(netdev, &cf); | |
384 | if (!skb) | |
385 | goto resubmit_urb; | |
386 | ||
387 | cf->can_id |= CAN_ERR_CRTL; | |
c7b74967 | 388 | cf->len = CAN_ERR_DLC; |
d08e973a MS |
389 | cf->data[1] = CAN_ERR_CRTL_RX_OVERFLOW; |
390 | stats->rx_over_errors++; | |
391 | stats->rx_errors++; | |
392 | netif_rx(skb); | |
393 | } | |
394 | ||
395 | resubmit_urb: | |
396 | usb_fill_bulk_urb(urb, | |
397 | usbcan->udev, | |
398 | usb_rcvbulkpipe(usbcan->udev, GSUSB_ENDPOINT_IN), | |
399 | hf, | |
400 | sizeof(struct gs_host_frame), | |
ae421e33 | 401 | gs_usb_receive_bulk_callback, |
d08e973a MS |
402 | usbcan |
403 | ); | |
404 | ||
405 | rc = usb_submit_urb(urb, GFP_ATOMIC); | |
406 | ||
407 | /* USB failure take down all interfaces */ | |
408 | if (rc == -ENODEV) { | |
03329338 | 409 | device_detach: |
d08e973a MS |
410 | for (rc = 0; rc < GS_MAX_INTF; rc++) { |
411 | if (usbcan->canch[rc]) | |
412 | netif_device_detach(usbcan->canch[rc]->netdev); | |
413 | } | |
414 | } | |
415 | } | |
416 | ||
417 | static int gs_usb_set_bittiming(struct net_device *netdev) | |
418 | { | |
419 | struct gs_can *dev = netdev_priv(netdev); | |
420 | struct can_bittiming *bt = &dev->can.bittiming; | |
421 | struct usb_interface *intf = dev->iface; | |
422 | int rc; | |
423 | struct gs_device_bittiming *dbt; | |
424 | ||
425 | dbt = kmalloc(sizeof(*dbt), GFP_KERNEL); | |
426 | if (!dbt) | |
427 | return -ENOMEM; | |
428 | ||
4ba1cb39 MKB |
429 | dbt->prop_seg = cpu_to_le32(bt->prop_seg); |
430 | dbt->phase_seg1 = cpu_to_le32(bt->phase_seg1); | |
431 | dbt->phase_seg2 = cpu_to_le32(bt->phase_seg2); | |
432 | dbt->sjw = cpu_to_le32(bt->sjw); | |
433 | dbt->brp = cpu_to_le32(bt->brp); | |
d08e973a MS |
434 | |
435 | /* request bit timings */ | |
436 | rc = usb_control_msg(interface_to_usbdev(intf), | |
437 | usb_sndctrlpipe(interface_to_usbdev(intf), 0), | |
438 | GS_USB_BREQ_BITTIMING, | |
540a27ae | 439 | USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_INTERFACE, |
d08e973a MS |
440 | dev->channel, |
441 | 0, | |
442 | dbt, | |
443 | sizeof(*dbt), | |
444 | 1000); | |
445 | ||
446 | kfree(dbt); | |
447 | ||
448 | if (rc < 0) | |
449 | dev_err(netdev->dev.parent, "Couldn't set bittimings (err=%d)", | |
450 | rc); | |
451 | ||
d5b42e66 | 452 | return (rc > 0) ? 0 : rc; |
d08e973a MS |
453 | } |
454 | ||
455 | static void gs_usb_xmit_callback(struct urb *urb) | |
456 | { | |
457 | struct gs_tx_context *txc = urb->context; | |
458 | struct gs_can *dev = txc->dev; | |
459 | struct net_device *netdev = dev->netdev; | |
460 | ||
461 | if (urb->status) | |
462 | netdev_info(netdev, "usb xmit fail %d\n", txc->echo_id); | |
463 | ||
464 | usb_free_coherent(urb->dev, | |
465 | urb->transfer_buffer_length, | |
466 | urb->transfer_buffer, | |
467 | urb->transfer_dma); | |
d08e973a MS |
468 | } |
469 | ||
9be95c91 MS |
470 | static netdev_tx_t gs_can_start_xmit(struct sk_buff *skb, |
471 | struct net_device *netdev) | |
d08e973a MS |
472 | { |
473 | struct gs_can *dev = netdev_priv(netdev); | |
474 | struct net_device_stats *stats = &dev->netdev->stats; | |
475 | struct urb *urb; | |
476 | struct gs_host_frame *hf; | |
477 | struct can_frame *cf; | |
478 | int rc; | |
479 | unsigned int idx; | |
480 | struct gs_tx_context *txc; | |
481 | ||
482 | if (can_dropped_invalid_skb(netdev, skb)) | |
483 | return NETDEV_TX_OK; | |
484 | ||
485 | /* find an empty context to keep track of transmission */ | |
486 | txc = gs_alloc_tx_context(dev); | |
487 | if (!txc) | |
488 | return NETDEV_TX_BUSY; | |
489 | ||
490 | /* create a URB, and a buffer for it */ | |
491 | urb = usb_alloc_urb(0, GFP_ATOMIC); | |
2a4a1e40 | 492 | if (!urb) |
d08e973a | 493 | goto nomem_urb; |
d08e973a MS |
494 | |
495 | hf = usb_alloc_coherent(dev->udev, sizeof(*hf), GFP_ATOMIC, | |
496 | &urb->transfer_dma); | |
497 | if (!hf) { | |
498 | netdev_err(netdev, "No memory left for USB buffer\n"); | |
499 | goto nomem_hf; | |
500 | } | |
501 | ||
502 | idx = txc->echo_id; | |
503 | ||
504 | if (idx >= GS_MAX_TX_URBS) { | |
505 | netdev_err(netdev, "Invalid tx context %d\n", idx); | |
506 | goto badidx; | |
507 | } | |
508 | ||
509 | hf->echo_id = idx; | |
510 | hf->channel = dev->channel; | |
143cbb8d BS |
511 | hf->flags = 0; |
512 | hf->reserved = 0; | |
d08e973a MS |
513 | |
514 | cf = (struct can_frame *)skb->data; | |
515 | ||
4ba1cb39 | 516 | hf->can_id = cpu_to_le32(cf->can_id); |
4c01fc87 OH |
517 | hf->can_dlc = can_get_cc_dlc(cf, dev->can.ctrlmode); |
518 | ||
c7b74967 | 519 | memcpy(hf->data, cf->data, cf->len); |
d08e973a MS |
520 | |
521 | usb_fill_bulk_urb(urb, dev->udev, | |
522 | usb_sndbulkpipe(dev->udev, GSUSB_ENDPOINT_OUT), | |
523 | hf, | |
524 | sizeof(*hf), | |
525 | gs_usb_xmit_callback, | |
526 | txc); | |
527 | ||
528 | urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; | |
529 | usb_anchor_urb(urb, &dev->tx_submitted); | |
530 | ||
1dcb6e57 | 531 | can_put_echo_skb(skb, netdev, idx, 0); |
d08e973a MS |
532 | |
533 | atomic_inc(&dev->active_tx_urbs); | |
534 | ||
535 | rc = usb_submit_urb(urb, GFP_ATOMIC); | |
536 | if (unlikely(rc)) { /* usb send failed */ | |
537 | atomic_dec(&dev->active_tx_urbs); | |
538 | ||
f318482a | 539 | can_free_echo_skb(netdev, idx, NULL); |
d08e973a MS |
540 | gs_free_tx_context(txc); |
541 | ||
542 | usb_unanchor_urb(urb); | |
543 | usb_free_coherent(dev->udev, | |
544 | sizeof(*hf), | |
545 | hf, | |
546 | urb->transfer_dma); | |
547 | ||
d08e973a MS |
548 | if (rc == -ENODEV) { |
549 | netif_device_detach(netdev); | |
550 | } else { | |
551 | netdev_err(netdev, "usb_submit failed (err=%d)\n", rc); | |
552 | stats->tx_dropped++; | |
553 | } | |
554 | } else { | |
555 | /* Slow down tx path */ | |
556 | if (atomic_read(&dev->active_tx_urbs) >= GS_MAX_TX_URBS) | |
557 | netif_stop_queue(netdev); | |
558 | } | |
559 | ||
560 | /* let usb core take care of this urb */ | |
561 | usb_free_urb(urb); | |
562 | ||
563 | return NETDEV_TX_OK; | |
564 | ||
565 | badidx: | |
566 | usb_free_coherent(dev->udev, | |
567 | sizeof(*hf), | |
568 | hf, | |
569 | urb->transfer_dma); | |
570 | nomem_hf: | |
571 | usb_free_urb(urb); | |
572 | ||
573 | nomem_urb: | |
574 | gs_free_tx_context(txc); | |
575 | dev_kfree_skb(skb); | |
576 | stats->tx_dropped++; | |
577 | return NETDEV_TX_OK; | |
578 | } | |
579 | ||
580 | static int gs_can_open(struct net_device *netdev) | |
581 | { | |
582 | struct gs_can *dev = netdev_priv(netdev); | |
583 | struct gs_usb *parent = dev->parent; | |
584 | int rc, i; | |
585 | struct gs_device_mode *dm; | |
586 | u32 ctrlmode; | |
4ba1cb39 | 587 | u32 flags = 0; |
d08e973a MS |
588 | |
589 | rc = open_candev(netdev); | |
590 | if (rc) | |
591 | return rc; | |
592 | ||
30236f2e | 593 | if (!parent->active_channels) { |
d08e973a MS |
594 | for (i = 0; i < GS_MAX_RX_URBS; i++) { |
595 | struct urb *urb; | |
596 | u8 *buf; | |
597 | ||
598 | /* alloc rx urb */ | |
599 | urb = usb_alloc_urb(0, GFP_KERNEL); | |
2a4a1e40 | 600 | if (!urb) |
d08e973a | 601 | return -ENOMEM; |
d08e973a MS |
602 | |
603 | /* alloc rx buffer */ | |
604 | buf = usb_alloc_coherent(dev->udev, | |
605 | sizeof(struct gs_host_frame), | |
606 | GFP_KERNEL, | |
607 | &urb->transfer_dma); | |
608 | if (!buf) { | |
609 | netdev_err(netdev, | |
610 | "No memory left for USB buffer\n"); | |
611 | usb_free_urb(urb); | |
612 | return -ENOMEM; | |
613 | } | |
614 | ||
615 | /* fill, anchor, and submit rx urb */ | |
616 | usb_fill_bulk_urb(urb, | |
617 | dev->udev, | |
618 | usb_rcvbulkpipe(dev->udev, | |
619 | GSUSB_ENDPOINT_IN), | |
620 | buf, | |
621 | sizeof(struct gs_host_frame), | |
ae421e33 | 622 | gs_usb_receive_bulk_callback, |
d08e973a MS |
623 | parent); |
624 | urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; | |
625 | ||
626 | usb_anchor_urb(urb, &parent->rx_submitted); | |
627 | ||
628 | rc = usb_submit_urb(urb, GFP_KERNEL); | |
629 | if (rc) { | |
630 | if (rc == -ENODEV) | |
631 | netif_device_detach(dev->netdev); | |
632 | ||
633 | netdev_err(netdev, | |
634 | "usb_submit failed (err=%d)\n", | |
635 | rc); | |
636 | ||
637 | usb_unanchor_urb(urb); | |
fb5be6a7 | 638 | usb_free_urb(urb); |
d08e973a MS |
639 | break; |
640 | } | |
641 | ||
642 | /* Drop reference, | |
643 | * USB core will take care of freeing it | |
644 | */ | |
645 | usb_free_urb(urb); | |
646 | } | |
647 | } | |
648 | ||
649 | dm = kmalloc(sizeof(*dm), GFP_KERNEL); | |
650 | if (!dm) | |
651 | return -ENOMEM; | |
652 | ||
653 | /* flags */ | |
654 | ctrlmode = dev->can.ctrlmode; | |
d08e973a MS |
655 | |
656 | if (ctrlmode & CAN_CTRLMODE_LOOPBACK) | |
4ba1cb39 | 657 | flags |= GS_CAN_MODE_LOOP_BACK; |
d08e973a | 658 | else if (ctrlmode & CAN_CTRLMODE_LISTENONLY) |
4ba1cb39 | 659 | flags |= GS_CAN_MODE_LISTEN_ONLY; |
d08e973a MS |
660 | |
661 | /* Controller is not allowed to retry TX | |
662 | * this mode is unavailable on atmels uc3c hardware | |
663 | */ | |
664 | if (ctrlmode & CAN_CTRLMODE_ONE_SHOT) | |
4ba1cb39 | 665 | flags |= GS_CAN_MODE_ONE_SHOT; |
d08e973a MS |
666 | |
667 | if (ctrlmode & CAN_CTRLMODE_3_SAMPLES) | |
4ba1cb39 | 668 | flags |= GS_CAN_MODE_TRIPLE_SAMPLE; |
d08e973a MS |
669 | |
670 | /* finally start device */ | |
4ba1cb39 MKB |
671 | dm->mode = cpu_to_le32(GS_CAN_MODE_START); |
672 | dm->flags = cpu_to_le32(flags); | |
d08e973a MS |
673 | rc = usb_control_msg(interface_to_usbdev(dev->iface), |
674 | usb_sndctrlpipe(interface_to_usbdev(dev->iface), 0), | |
675 | GS_USB_BREQ_MODE, | |
9be95c91 MS |
676 | USB_DIR_OUT | USB_TYPE_VENDOR | |
677 | USB_RECIP_INTERFACE, | |
d08e973a MS |
678 | dev->channel, |
679 | 0, | |
680 | dm, | |
681 | sizeof(*dm), | |
682 | 1000); | |
683 | ||
684 | if (rc < 0) { | |
685 | netdev_err(netdev, "Couldn't start device (err=%d)\n", rc); | |
686 | kfree(dm); | |
687 | return rc; | |
688 | } | |
689 | ||
690 | kfree(dm); | |
691 | ||
692 | dev->can.state = CAN_STATE_ERROR_ACTIVE; | |
693 | ||
30236f2e | 694 | parent->active_channels++; |
d08e973a MS |
695 | if (!(dev->can.ctrlmode & CAN_CTRLMODE_LISTENONLY)) |
696 | netif_start_queue(netdev); | |
697 | ||
698 | return 0; | |
699 | } | |
700 | ||
701 | static int gs_can_close(struct net_device *netdev) | |
702 | { | |
703 | int rc; | |
704 | struct gs_can *dev = netdev_priv(netdev); | |
705 | struct gs_usb *parent = dev->parent; | |
706 | ||
707 | netif_stop_queue(netdev); | |
708 | ||
709 | /* Stop polling */ | |
30236f2e VM |
710 | parent->active_channels--; |
711 | if (!parent->active_channels) | |
d08e973a MS |
712 | usb_kill_anchored_urbs(&parent->rx_submitted); |
713 | ||
714 | /* Stop sending URBs */ | |
715 | usb_kill_anchored_urbs(&dev->tx_submitted); | |
716 | atomic_set(&dev->active_tx_urbs, 0); | |
717 | ||
718 | /* reset the device */ | |
dda8deb6 | 719 | rc = gs_cmd_reset(dev); |
d08e973a MS |
720 | if (rc < 0) |
721 | netdev_warn(netdev, "Couldn't shutdown device (err=%d)", rc); | |
722 | ||
723 | /* reset tx contexts */ | |
724 | for (rc = 0; rc < GS_MAX_TX_URBS; rc++) { | |
725 | dev->tx_context[rc].dev = dev; | |
726 | dev->tx_context[rc].echo_id = GS_MAX_TX_URBS; | |
727 | } | |
728 | ||
729 | /* close the netdev */ | |
730 | close_candev(netdev); | |
731 | ||
732 | return 0; | |
733 | } | |
734 | ||
735 | static const struct net_device_ops gs_usb_netdev_ops = { | |
736 | .ndo_open = gs_can_open, | |
737 | .ndo_stop = gs_can_close, | |
738 | .ndo_start_xmit = gs_can_start_xmit, | |
50212b42 | 739 | .ndo_change_mtu = can_change_mtu, |
d08e973a MS |
740 | }; |
741 | ||
05ca5270 MS |
742 | static int gs_usb_set_identify(struct net_device *netdev, bool do_identify) |
743 | { | |
744 | struct gs_can *dev = netdev_priv(netdev); | |
b05c73bd | 745 | struct gs_identify_mode *imode; |
05ca5270 MS |
746 | int rc; |
747 | ||
b05c73bd MS |
748 | imode = kmalloc(sizeof(*imode), GFP_KERNEL); |
749 | ||
750 | if (!imode) | |
751 | return -ENOMEM; | |
752 | ||
05ca5270 | 753 | if (do_identify) |
4ba1cb39 | 754 | imode->mode = cpu_to_le32(GS_CAN_IDENTIFY_ON); |
05ca5270 | 755 | else |
4ba1cb39 | 756 | imode->mode = cpu_to_le32(GS_CAN_IDENTIFY_OFF); |
05ca5270 MS |
757 | |
758 | rc = usb_control_msg(interface_to_usbdev(dev->iface), | |
759 | usb_sndctrlpipe(interface_to_usbdev(dev->iface), | |
760 | 0), | |
761 | GS_USB_BREQ_IDENTIFY, | |
762 | USB_DIR_OUT | USB_TYPE_VENDOR | | |
763 | USB_RECIP_INTERFACE, | |
764 | dev->channel, | |
765 | 0, | |
b05c73bd MS |
766 | imode, |
767 | sizeof(*imode), | |
05ca5270 MS |
768 | 100); |
769 | ||
b05c73bd MS |
770 | kfree(imode); |
771 | ||
05ca5270 MS |
772 | return (rc > 0) ? 0 : rc; |
773 | } | |
774 | ||
775 | /* blink LED's for finding the this interface */ | |
776 | static int gs_usb_set_phys_id(struct net_device *dev, | |
777 | enum ethtool_phys_id_state state) | |
778 | { | |
779 | int rc = 0; | |
780 | ||
781 | switch (state) { | |
782 | case ETHTOOL_ID_ACTIVE: | |
783 | rc = gs_usb_set_identify(dev, GS_CAN_IDENTIFY_ON); | |
784 | break; | |
785 | case ETHTOOL_ID_INACTIVE: | |
786 | rc = gs_usb_set_identify(dev, GS_CAN_IDENTIFY_OFF); | |
787 | break; | |
788 | default: | |
789 | break; | |
790 | } | |
791 | ||
792 | return rc; | |
793 | } | |
794 | ||
795 | static const struct ethtool_ops gs_usb_ethtool_ops = { | |
796 | .set_phys_id = gs_usb_set_phys_id, | |
797 | }; | |
798 | ||
799 | static struct gs_can *gs_make_candev(unsigned int channel, | |
800 | struct usb_interface *intf, | |
801 | struct gs_device_config *dconf) | |
d08e973a MS |
802 | { |
803 | struct gs_can *dev; | |
804 | struct net_device *netdev; | |
805 | int rc; | |
806 | struct gs_device_bt_const *bt_const; | |
4ba1cb39 | 807 | u32 feature; |
d08e973a MS |
808 | |
809 | bt_const = kmalloc(sizeof(*bt_const), GFP_KERNEL); | |
810 | if (!bt_const) | |
811 | return ERR_PTR(-ENOMEM); | |
812 | ||
813 | /* fetch bit timing constants */ | |
814 | rc = usb_control_msg(interface_to_usbdev(intf), | |
815 | usb_rcvctrlpipe(interface_to_usbdev(intf), 0), | |
816 | GS_USB_BREQ_BT_CONST, | |
540a27ae | 817 | USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_INTERFACE, |
d08e973a MS |
818 | channel, |
819 | 0, | |
820 | bt_const, | |
821 | sizeof(*bt_const), | |
822 | 1000); | |
823 | ||
824 | if (rc < 0) { | |
825 | dev_err(&intf->dev, | |
826 | "Couldn't get bit timing const for channel (err=%d)\n", | |
827 | rc); | |
828 | kfree(bt_const); | |
829 | return ERR_PTR(rc); | |
830 | } | |
831 | ||
832 | /* create netdev */ | |
833 | netdev = alloc_candev(sizeof(struct gs_can), GS_MAX_TX_URBS); | |
834 | if (!netdev) { | |
835 | dev_err(&intf->dev, "Couldn't allocate candev\n"); | |
836 | kfree(bt_const); | |
837 | return ERR_PTR(-ENOMEM); | |
838 | } | |
839 | ||
840 | dev = netdev_priv(netdev); | |
841 | ||
842 | netdev->netdev_ops = &gs_usb_netdev_ops; | |
843 | ||
844 | netdev->flags |= IFF_ECHO; /* we support full roundtrip echo */ | |
845 | ||
88bfb9a7 | 846 | /* dev setup */ |
d08e973a | 847 | strcpy(dev->bt_const.name, "gs_usb"); |
4ba1cb39 MKB |
848 | dev->bt_const.tseg1_min = le32_to_cpu(bt_const->tseg1_min); |
849 | dev->bt_const.tseg1_max = le32_to_cpu(bt_const->tseg1_max); | |
850 | dev->bt_const.tseg2_min = le32_to_cpu(bt_const->tseg2_min); | |
851 | dev->bt_const.tseg2_max = le32_to_cpu(bt_const->tseg2_max); | |
852 | dev->bt_const.sjw_max = le32_to_cpu(bt_const->sjw_max); | |
853 | dev->bt_const.brp_min = le32_to_cpu(bt_const->brp_min); | |
854 | dev->bt_const.brp_max = le32_to_cpu(bt_const->brp_max); | |
855 | dev->bt_const.brp_inc = le32_to_cpu(bt_const->brp_inc); | |
d08e973a MS |
856 | |
857 | dev->udev = interface_to_usbdev(intf); | |
858 | dev->iface = intf; | |
859 | dev->netdev = netdev; | |
860 | dev->channel = channel; | |
861 | ||
862 | init_usb_anchor(&dev->tx_submitted); | |
863 | atomic_set(&dev->active_tx_urbs, 0); | |
864 | spin_lock_init(&dev->tx_ctx_lock); | |
865 | for (rc = 0; rc < GS_MAX_TX_URBS; rc++) { | |
866 | dev->tx_context[rc].dev = dev; | |
867 | dev->tx_context[rc].echo_id = GS_MAX_TX_URBS; | |
868 | } | |
869 | ||
88bfb9a7 | 870 | /* can setup */ |
d08e973a | 871 | dev->can.state = CAN_STATE_STOPPED; |
4ba1cb39 | 872 | dev->can.clock.freq = le32_to_cpu(bt_const->fclk_can); |
d08e973a MS |
873 | dev->can.bittiming_const = &dev->bt_const; |
874 | dev->can.do_set_bittiming = gs_usb_set_bittiming; | |
875 | ||
4c01fc87 | 876 | dev->can.ctrlmode_supported = CAN_CTRLMODE_CC_LEN8_DLC; |
d08e973a | 877 | |
4ba1cb39 MKB |
878 | feature = le32_to_cpu(bt_const->feature); |
879 | if (feature & GS_CAN_FEATURE_LISTEN_ONLY) | |
d08e973a MS |
880 | dev->can.ctrlmode_supported |= CAN_CTRLMODE_LISTENONLY; |
881 | ||
4ba1cb39 | 882 | if (feature & GS_CAN_FEATURE_LOOP_BACK) |
d08e973a MS |
883 | dev->can.ctrlmode_supported |= CAN_CTRLMODE_LOOPBACK; |
884 | ||
4ba1cb39 | 885 | if (feature & GS_CAN_FEATURE_TRIPLE_SAMPLE) |
d08e973a MS |
886 | dev->can.ctrlmode_supported |= CAN_CTRLMODE_3_SAMPLES; |
887 | ||
4ba1cb39 | 888 | if (feature & GS_CAN_FEATURE_ONE_SHOT) |
d08e973a MS |
889 | dev->can.ctrlmode_supported |= CAN_CTRLMODE_ONE_SHOT; |
890 | ||
d08e973a MS |
891 | SET_NETDEV_DEV(netdev, &intf->dev); |
892 | ||
4ba1cb39 MKB |
893 | if (le32_to_cpu(dconf->sw_version) > 1) |
894 | if (feature & GS_CAN_FEATURE_IDENTIFY) | |
05ca5270 MS |
895 | netdev->ethtool_ops = &gs_usb_ethtool_ops; |
896 | ||
897 | kfree(bt_const); | |
898 | ||
d08e973a MS |
899 | rc = register_candev(dev->netdev); |
900 | if (rc) { | |
901 | free_candev(dev->netdev); | |
902 | dev_err(&intf->dev, "Couldn't register candev (err=%d)\n", rc); | |
903 | return ERR_PTR(rc); | |
904 | } | |
905 | ||
906 | return dev; | |
907 | } | |
908 | ||
909 | static void gs_destroy_candev(struct gs_can *dev) | |
910 | { | |
911 | unregister_candev(dev->netdev); | |
d08e973a | 912 | usb_kill_anchored_urbs(&dev->tx_submitted); |
e9a2d81b | 913 | free_candev(dev->netdev); |
d08e973a MS |
914 | } |
915 | ||
05ca5270 MS |
916 | static int gs_usb_probe(struct usb_interface *intf, |
917 | const struct usb_device_id *id) | |
d08e973a MS |
918 | { |
919 | struct gs_usb *dev; | |
920 | int rc = -ENOMEM; | |
921 | unsigned int icount, i; | |
c919a306 EZ |
922 | struct gs_host_config *hconf; |
923 | struct gs_device_config *dconf; | |
924 | ||
925 | hconf = kmalloc(sizeof(*hconf), GFP_KERNEL); | |
926 | if (!hconf) | |
927 | return -ENOMEM; | |
928 | ||
4ba1cb39 | 929 | hconf->byte_order = cpu_to_le32(0x0000beef); |
d08e973a MS |
930 | |
931 | /* send host config */ | |
932 | rc = usb_control_msg(interface_to_usbdev(intf), | |
933 | usb_sndctrlpipe(interface_to_usbdev(intf), 0), | |
934 | GS_USB_BREQ_HOST_FORMAT, | |
540a27ae | 935 | USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_INTERFACE, |
d08e973a | 936 | 1, |
2f361cd9 | 937 | intf->cur_altsetting->desc.bInterfaceNumber, |
c919a306 EZ |
938 | hconf, |
939 | sizeof(*hconf), | |
d08e973a MS |
940 | 1000); |
941 | ||
c919a306 EZ |
942 | kfree(hconf); |
943 | ||
d08e973a MS |
944 | if (rc < 0) { |
945 | dev_err(&intf->dev, "Couldn't send data format (err=%d)\n", | |
946 | rc); | |
947 | return rc; | |
948 | } | |
949 | ||
c919a306 EZ |
950 | dconf = kmalloc(sizeof(*dconf), GFP_KERNEL); |
951 | if (!dconf) | |
952 | return -ENOMEM; | |
953 | ||
d08e973a MS |
954 | /* read device config */ |
955 | rc = usb_control_msg(interface_to_usbdev(intf), | |
956 | usb_rcvctrlpipe(interface_to_usbdev(intf), 0), | |
957 | GS_USB_BREQ_DEVICE_CONFIG, | |
540a27ae | 958 | USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_INTERFACE, |
d08e973a | 959 | 1, |
2f361cd9 | 960 | intf->cur_altsetting->desc.bInterfaceNumber, |
c919a306 EZ |
961 | dconf, |
962 | sizeof(*dconf), | |
d08e973a MS |
963 | 1000); |
964 | if (rc < 0) { | |
965 | dev_err(&intf->dev, "Couldn't get device config: (err=%d)\n", | |
966 | rc); | |
c919a306 | 967 | kfree(dconf); |
d08e973a MS |
968 | return rc; |
969 | } | |
970 | ||
c919a306 | 971 | icount = dconf->icount + 1; |
d08e973a MS |
972 | dev_info(&intf->dev, "Configuring for %d interfaces\n", icount); |
973 | ||
974 | if (icount > GS_MAX_INTF) { | |
975 | dev_err(&intf->dev, | |
976 | "Driver cannot handle more that %d CAN interfaces\n", | |
977 | GS_MAX_INTF); | |
c919a306 | 978 | kfree(dconf); |
d08e973a MS |
979 | return -EINVAL; |
980 | } | |
981 | ||
982 | dev = kzalloc(sizeof(*dev), GFP_KERNEL); | |
c919a306 EZ |
983 | if (!dev) { |
984 | kfree(dconf); | |
37920a74 | 985 | return -ENOMEM; |
c919a306 EZ |
986 | } |
987 | ||
d08e973a MS |
988 | init_usb_anchor(&dev->rx_submitted); |
989 | ||
d08e973a MS |
990 | usb_set_intfdata(intf, dev); |
991 | dev->udev = interface_to_usbdev(intf); | |
992 | ||
993 | for (i = 0; i < icount; i++) { | |
c919a306 | 994 | dev->canch[i] = gs_make_candev(i, intf, dconf); |
d08e973a | 995 | if (IS_ERR_OR_NULL(dev->canch[i])) { |
e9a2d81b MS |
996 | /* save error code to return later */ |
997 | rc = PTR_ERR(dev->canch[i]); | |
998 | ||
d08e973a MS |
999 | /* on failure destroy previously created candevs */ |
1000 | icount = i; | |
e9a2d81b | 1001 | for (i = 0; i < icount; i++) |
d08e973a | 1002 | gs_destroy_candev(dev->canch[i]); |
e9a2d81b MS |
1003 | |
1004 | usb_kill_anchored_urbs(&dev->rx_submitted); | |
c919a306 | 1005 | kfree(dconf); |
d08e973a MS |
1006 | kfree(dev); |
1007 | return rc; | |
1008 | } | |
1009 | dev->canch[i]->parent = dev; | |
1010 | } | |
1011 | ||
c919a306 EZ |
1012 | kfree(dconf); |
1013 | ||
d08e973a MS |
1014 | return 0; |
1015 | } | |
1016 | ||
1017 | static void gs_usb_disconnect(struct usb_interface *intf) | |
1018 | { | |
1019 | unsigned i; | |
1020 | struct gs_usb *dev = usb_get_intfdata(intf); | |
1021 | usb_set_intfdata(intf, NULL); | |
1022 | ||
1023 | if (!dev) { | |
1024 | dev_err(&intf->dev, "Disconnect (nodata)\n"); | |
1025 | return; | |
1026 | } | |
1027 | ||
e9a2d81b MS |
1028 | for (i = 0; i < GS_MAX_INTF; i++) |
1029 | if (dev->canch[i]) | |
1030 | gs_destroy_candev(dev->canch[i]); | |
d08e973a MS |
1031 | |
1032 | usb_kill_anchored_urbs(&dev->rx_submitted); | |
e9a2d81b | 1033 | kfree(dev); |
d08e973a MS |
1034 | } |
1035 | ||
1036 | static const struct usb_device_id gs_usb_table[] = { | |
2fe6c943 MS |
1037 | { USB_DEVICE_INTERFACE_NUMBER(USB_GSUSB_1_VENDOR_ID, |
1038 | USB_GSUSB_1_PRODUCT_ID, 0) }, | |
f155d9c0 MS |
1039 | { USB_DEVICE_INTERFACE_NUMBER(USB_CANDLELIGHT_VENDOR_ID, |
1040 | USB_CANDLELIGHT_PRODUCT_ID, 0) }, | |
d08e973a MS |
1041 | {} /* Terminating entry */ |
1042 | }; | |
1043 | ||
1044 | MODULE_DEVICE_TABLE(usb, gs_usb_table); | |
1045 | ||
1046 | static struct usb_driver gs_usb_driver = { | |
1047 | .name = "gs_usb", | |
1048 | .probe = gs_usb_probe, | |
1049 | .disconnect = gs_usb_disconnect, | |
1050 | .id_table = gs_usb_table, | |
1051 | }; | |
1052 | ||
1053 | module_usb_driver(gs_usb_driver); | |
1054 | ||
1055 | MODULE_AUTHOR("Maximilian Schneider <mws@schneidersoft.net>"); | |
1056 | MODULE_DESCRIPTION( | |
1057 | "Socket CAN device driver for Geschwister Schneider Technologie-, " | |
f155d9c0 MS |
1058 | "Entwicklungs- und Vertriebs UG. USB2.0 to CAN interfaces\n" |
1059 | "and bytewerk.org candleLight USB CAN interfaces."); | |
d08e973a | 1060 | MODULE_LICENSE("GPL v2"); |