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14#include <linux/completion.h>
15#include <linux/device.h>
16#include <linux/gfp.h>
17#include <linux/if.h>
18#include <linux/kernel.h>
19#include <linux/module.h>
20#include <linux/netdevice.h>
21#include <linux/spinlock.h>
22#include <linux/types.h>
23#include <linux/usb.h>
24
25#include <linux/can.h>
26#include <linux/can/dev.h>
27#include <linux/can/error.h>
28#include <linux/can/netlink.h>
29
30#include "kvaser_usb.h"
31
32
33#define KVASER_VENDOR_ID 0x0bfd
34
35
36#define USB_LEAF_DEVEL_PRODUCT_ID 10
37#define USB_LEAF_LITE_PRODUCT_ID 11
38#define USB_LEAF_PRO_PRODUCT_ID 12
39#define USB_LEAF_SPRO_PRODUCT_ID 14
40#define USB_LEAF_PRO_LS_PRODUCT_ID 15
41#define USB_LEAF_PRO_SWC_PRODUCT_ID 16
42#define USB_LEAF_PRO_LIN_PRODUCT_ID 17
43#define USB_LEAF_SPRO_LS_PRODUCT_ID 18
44#define USB_LEAF_SPRO_SWC_PRODUCT_ID 19
45#define USB_MEMO2_DEVEL_PRODUCT_ID 22
46#define USB_MEMO2_HSHS_PRODUCT_ID 23
47#define USB_UPRO_HSHS_PRODUCT_ID 24
48#define USB_LEAF_LITE_GI_PRODUCT_ID 25
49#define USB_LEAF_PRO_OBDII_PRODUCT_ID 26
50#define USB_MEMO2_HSLS_PRODUCT_ID 27
51#define USB_LEAF_LITE_CH_PRODUCT_ID 28
52#define USB_BLACKBIRD_SPRO_PRODUCT_ID 29
53#define USB_OEM_MERCURY_PRODUCT_ID 34
54#define USB_OEM_LEAF_PRODUCT_ID 35
55#define USB_CAN_R_PRODUCT_ID 39
56#define USB_LEAF_LITE_V2_PRODUCT_ID 288
57#define USB_MINI_PCIE_HS_PRODUCT_ID 289
58#define USB_LEAF_LIGHT_HS_V2_OEM_PRODUCT_ID 290
59#define USB_USBCAN_LIGHT_2HS_PRODUCT_ID 291
60#define USB_MINI_PCIE_2HS_PRODUCT_ID 292
61#define USB_USBCAN_R_V2_PRODUCT_ID 294
62#define USB_LEAF_LIGHT_R_V2_PRODUCT_ID 295
63#define USB_LEAF_LIGHT_HS_V2_OEM2_PRODUCT_ID 296
64#define USB_LEAF_PRODUCT_ID_END \
65 USB_LEAF_LIGHT_HS_V2_OEM2_PRODUCT_ID
66
67
68#define USB_USBCAN_REVB_PRODUCT_ID 2
69#define USB_VCI2_PRODUCT_ID 3
70#define USB_USBCAN2_PRODUCT_ID 4
71#define USB_MEMORATOR_PRODUCT_ID 5
72
73
74#define USB_BLACKBIRD_V2_PRODUCT_ID 258
75#define USB_MEMO_PRO_5HS_PRODUCT_ID 260
76#define USB_USBCAN_PRO_5HS_PRODUCT_ID 261
77#define USB_USBCAN_LIGHT_4HS_PRODUCT_ID 262
78#define USB_LEAF_PRO_HS_V2_PRODUCT_ID 263
79#define USB_USBCAN_PRO_2HS_V2_PRODUCT_ID 264
80#define USB_MEMO_2HS_PRODUCT_ID 265
81#define USB_MEMO_PRO_2HS_V2_PRODUCT_ID 266
82#define USB_HYBRID_CANLIN_PRODUCT_ID 267
83#define USB_ATI_USBCAN_PRO_2HS_V2_PRODUCT_ID 268
84#define USB_ATI_MEMO_PRO_2HS_V2_PRODUCT_ID 269
85#define USB_HYBRID_PRO_CANLIN_PRODUCT_ID 270
86#define USB_U100_PRODUCT_ID 273
87#define USB_U100P_PRODUCT_ID 274
88#define USB_U100S_PRODUCT_ID 275
89#define USB_USBCAN_PRO_4HS_PRODUCT_ID 276
90#define USB_HYDRA_PRODUCT_ID_END \
91 USB_USBCAN_PRO_4HS_PRODUCT_ID
92
93static inline bool kvaser_is_leaf(const struct usb_device_id *id)
94{
95 return (id->idProduct >= USB_LEAF_DEVEL_PRODUCT_ID &&
96 id->idProduct <= USB_CAN_R_PRODUCT_ID) ||
97 (id->idProduct >= USB_LEAF_LITE_V2_PRODUCT_ID &&
98 id->idProduct <= USB_LEAF_PRODUCT_ID_END);
99}
100
101static inline bool kvaser_is_usbcan(const struct usb_device_id *id)
102{
103 return id->idProduct >= USB_USBCAN_REVB_PRODUCT_ID &&
104 id->idProduct <= USB_MEMORATOR_PRODUCT_ID;
105}
106
107static inline bool kvaser_is_hydra(const struct usb_device_id *id)
108{
109 return id->idProduct >= USB_BLACKBIRD_V2_PRODUCT_ID &&
110 id->idProduct <= USB_HYDRA_PRODUCT_ID_END;
111}
112
113static const struct usb_device_id kvaser_usb_table[] = {
114
115 { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_DEVEL_PRODUCT_ID) },
116 { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_LITE_PRODUCT_ID) },
117 { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_PRO_PRODUCT_ID),
118 .driver_info = KVASER_USB_HAS_TXRX_ERRORS |
119 KVASER_USB_HAS_SILENT_MODE },
120 { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_SPRO_PRODUCT_ID),
121 .driver_info = KVASER_USB_HAS_TXRX_ERRORS |
122 KVASER_USB_HAS_SILENT_MODE },
123 { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_PRO_LS_PRODUCT_ID),
124 .driver_info = KVASER_USB_HAS_TXRX_ERRORS |
125 KVASER_USB_HAS_SILENT_MODE },
126 { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_PRO_SWC_PRODUCT_ID),
127 .driver_info = KVASER_USB_HAS_TXRX_ERRORS |
128 KVASER_USB_HAS_SILENT_MODE },
129 { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_PRO_LIN_PRODUCT_ID),
130 .driver_info = KVASER_USB_HAS_TXRX_ERRORS |
131 KVASER_USB_HAS_SILENT_MODE },
132 { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_SPRO_LS_PRODUCT_ID),
133 .driver_info = KVASER_USB_HAS_TXRX_ERRORS |
134 KVASER_USB_HAS_SILENT_MODE },
135 { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_SPRO_SWC_PRODUCT_ID),
136 .driver_info = KVASER_USB_HAS_TXRX_ERRORS |
137 KVASER_USB_HAS_SILENT_MODE },
138 { USB_DEVICE(KVASER_VENDOR_ID, USB_MEMO2_DEVEL_PRODUCT_ID),
139 .driver_info = KVASER_USB_HAS_TXRX_ERRORS |
140 KVASER_USB_HAS_SILENT_MODE },
141 { USB_DEVICE(KVASER_VENDOR_ID, USB_MEMO2_HSHS_PRODUCT_ID),
142 .driver_info = KVASER_USB_HAS_TXRX_ERRORS |
143 KVASER_USB_HAS_SILENT_MODE },
144 { USB_DEVICE(KVASER_VENDOR_ID, USB_UPRO_HSHS_PRODUCT_ID),
145 .driver_info = KVASER_USB_HAS_TXRX_ERRORS },
146 { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_LITE_GI_PRODUCT_ID) },
147 { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_PRO_OBDII_PRODUCT_ID),
148 .driver_info = KVASER_USB_HAS_TXRX_ERRORS |
149 KVASER_USB_HAS_SILENT_MODE },
150 { USB_DEVICE(KVASER_VENDOR_ID, USB_MEMO2_HSLS_PRODUCT_ID),
151 .driver_info = KVASER_USB_HAS_TXRX_ERRORS },
152 { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_LITE_CH_PRODUCT_ID),
153 .driver_info = KVASER_USB_HAS_TXRX_ERRORS },
154 { USB_DEVICE(KVASER_VENDOR_ID, USB_BLACKBIRD_SPRO_PRODUCT_ID),
155 .driver_info = KVASER_USB_HAS_TXRX_ERRORS },
156 { USB_DEVICE(KVASER_VENDOR_ID, USB_OEM_MERCURY_PRODUCT_ID),
157 .driver_info = KVASER_USB_HAS_TXRX_ERRORS },
158 { USB_DEVICE(KVASER_VENDOR_ID, USB_OEM_LEAF_PRODUCT_ID),
159 .driver_info = KVASER_USB_HAS_TXRX_ERRORS },
160 { USB_DEVICE(KVASER_VENDOR_ID, USB_CAN_R_PRODUCT_ID),
161 .driver_info = KVASER_USB_HAS_TXRX_ERRORS },
162 { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_LITE_V2_PRODUCT_ID) },
163 { USB_DEVICE(KVASER_VENDOR_ID, USB_MINI_PCIE_HS_PRODUCT_ID) },
164 { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_LIGHT_HS_V2_OEM_PRODUCT_ID) },
165 { USB_DEVICE(KVASER_VENDOR_ID, USB_USBCAN_LIGHT_2HS_PRODUCT_ID) },
166 { USB_DEVICE(KVASER_VENDOR_ID, USB_MINI_PCIE_2HS_PRODUCT_ID) },
167 { USB_DEVICE(KVASER_VENDOR_ID, USB_USBCAN_R_V2_PRODUCT_ID) },
168 { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_LIGHT_R_V2_PRODUCT_ID) },
169 { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_LIGHT_HS_V2_OEM2_PRODUCT_ID) },
170
171
172 { USB_DEVICE(KVASER_VENDOR_ID, USB_USBCAN2_PRODUCT_ID),
173 .driver_info = KVASER_USB_HAS_TXRX_ERRORS },
174 { USB_DEVICE(KVASER_VENDOR_ID, USB_USBCAN_REVB_PRODUCT_ID),
175 .driver_info = KVASER_USB_HAS_TXRX_ERRORS },
176 { USB_DEVICE(KVASER_VENDOR_ID, USB_MEMORATOR_PRODUCT_ID),
177 .driver_info = KVASER_USB_HAS_TXRX_ERRORS },
178 { USB_DEVICE(KVASER_VENDOR_ID, USB_VCI2_PRODUCT_ID),
179 .driver_info = KVASER_USB_HAS_TXRX_ERRORS },
180
181
182 { USB_DEVICE(KVASER_VENDOR_ID, USB_BLACKBIRD_V2_PRODUCT_ID) },
183 { USB_DEVICE(KVASER_VENDOR_ID, USB_MEMO_PRO_5HS_PRODUCT_ID) },
184 { USB_DEVICE(KVASER_VENDOR_ID, USB_USBCAN_PRO_5HS_PRODUCT_ID) },
185 { USB_DEVICE(KVASER_VENDOR_ID, USB_USBCAN_LIGHT_4HS_PRODUCT_ID) },
186 { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_PRO_HS_V2_PRODUCT_ID) },
187 { USB_DEVICE(KVASER_VENDOR_ID, USB_USBCAN_PRO_2HS_V2_PRODUCT_ID) },
188 { USB_DEVICE(KVASER_VENDOR_ID, USB_MEMO_2HS_PRODUCT_ID) },
189 { USB_DEVICE(KVASER_VENDOR_ID, USB_MEMO_PRO_2HS_V2_PRODUCT_ID) },
190 { USB_DEVICE(KVASER_VENDOR_ID, USB_HYBRID_CANLIN_PRODUCT_ID) },
191 { USB_DEVICE(KVASER_VENDOR_ID, USB_ATI_USBCAN_PRO_2HS_V2_PRODUCT_ID) },
192 { USB_DEVICE(KVASER_VENDOR_ID, USB_ATI_MEMO_PRO_2HS_V2_PRODUCT_ID) },
193 { USB_DEVICE(KVASER_VENDOR_ID, USB_HYBRID_PRO_CANLIN_PRODUCT_ID) },
194 { USB_DEVICE(KVASER_VENDOR_ID, USB_U100_PRODUCT_ID) },
195 { USB_DEVICE(KVASER_VENDOR_ID, USB_U100P_PRODUCT_ID) },
196 { USB_DEVICE(KVASER_VENDOR_ID, USB_U100S_PRODUCT_ID) },
197 { USB_DEVICE(KVASER_VENDOR_ID, USB_USBCAN_PRO_4HS_PRODUCT_ID) },
198 { }
199};
200MODULE_DEVICE_TABLE(usb, kvaser_usb_table);
201
202int kvaser_usb_send_cmd(const struct kvaser_usb *dev, void *cmd, int len)
203{
204 int actual_len;
205
206 return usb_bulk_msg(dev->udev,
207 usb_sndbulkpipe(dev->udev,
208 dev->bulk_out->bEndpointAddress),
209 cmd, len, &actual_len, KVASER_USB_TIMEOUT);
210}
211
212int kvaser_usb_recv_cmd(const struct kvaser_usb *dev, void *cmd, int len,
213 int *actual_len)
214{
215 return usb_bulk_msg(dev->udev,
216 usb_rcvbulkpipe(dev->udev,
217 dev->bulk_in->bEndpointAddress),
218 cmd, len, actual_len, KVASER_USB_TIMEOUT);
219}
220
221static void kvaser_usb_send_cmd_callback(struct urb *urb)
222{
223 struct net_device *netdev = urb->context;
224
225 kfree(urb->transfer_buffer);
226
227 if (urb->status)
228 netdev_warn(netdev, "urb status received: %d\n", urb->status);
229}
230
231int kvaser_usb_send_cmd_async(struct kvaser_usb_net_priv *priv, void *cmd,
232 int len)
233{
234 struct kvaser_usb *dev = priv->dev;
235 struct net_device *netdev = priv->netdev;
236 struct urb *urb;
237 int err;
238
239 urb = usb_alloc_urb(0, GFP_ATOMIC);
240 if (!urb)
241 return -ENOMEM;
242
243 usb_fill_bulk_urb(urb, dev->udev,
244 usb_sndbulkpipe(dev->udev,
245 dev->bulk_out->bEndpointAddress),
246 cmd, len, kvaser_usb_send_cmd_callback, netdev);
247 usb_anchor_urb(urb, &priv->tx_submitted);
248
249 err = usb_submit_urb(urb, GFP_ATOMIC);
250 if (err) {
251 netdev_err(netdev, "Error transmitting URB\n");
252 usb_unanchor_urb(urb);
253 }
254 usb_free_urb(urb);
255
256 return 0;
257}
258
259int kvaser_usb_can_rx_over_error(struct net_device *netdev)
260{
261 struct net_device_stats *stats = &netdev->stats;
262 struct can_frame *cf;
263 struct sk_buff *skb;
264
265 stats->rx_over_errors++;
266 stats->rx_errors++;
267
268 skb = alloc_can_err_skb(netdev, &cf);
269 if (!skb) {
270 stats->rx_dropped++;
271 netdev_warn(netdev, "No memory left for err_skb\n");
272 return -ENOMEM;
273 }
274
275 cf->can_id |= CAN_ERR_CRTL;
276 cf->data[1] = CAN_ERR_CRTL_RX_OVERFLOW;
277
278 stats->rx_packets++;
279 stats->rx_bytes += cf->len;
280 netif_rx(skb);
281
282 return 0;
283}
284
285static void kvaser_usb_read_bulk_callback(struct urb *urb)
286{
287 struct kvaser_usb *dev = urb->context;
288 int err;
289 unsigned int i;
290
291 switch (urb->status) {
292 case 0:
293 break;
294 case -ENOENT:
295 case -EPIPE:
296 case -EPROTO:
297 case -ESHUTDOWN:
298 return;
299 default:
300 dev_info(&dev->intf->dev, "Rx URB aborted (%d)\n", urb->status);
301 goto resubmit_urb;
302 }
303
304 dev->ops->dev_read_bulk_callback(dev, urb->transfer_buffer,
305 urb->actual_length);
306
307resubmit_urb:
308 usb_fill_bulk_urb(urb, dev->udev,
309 usb_rcvbulkpipe(dev->udev,
310 dev->bulk_in->bEndpointAddress),
311 urb->transfer_buffer, KVASER_USB_RX_BUFFER_SIZE,
312 kvaser_usb_read_bulk_callback, dev);
313
314 err = usb_submit_urb(urb, GFP_ATOMIC);
315 if (err == -ENODEV) {
316 for (i = 0; i < dev->nchannels; i++) {
317 if (!dev->nets[i])
318 continue;
319
320 netif_device_detach(dev->nets[i]->netdev);
321 }
322 } else if (err) {
323 dev_err(&dev->intf->dev,
324 "Failed resubmitting read bulk urb: %d\n", err);
325 }
326}
327
328static int kvaser_usb_setup_rx_urbs(struct kvaser_usb *dev)
329{
330 int i, err = 0;
331
332 if (dev->rxinitdone)
333 return 0;
334
335 for (i = 0; i < KVASER_USB_MAX_RX_URBS; i++) {
336 struct urb *urb = NULL;
337 u8 *buf = NULL;
338 dma_addr_t buf_dma;
339
340 urb = usb_alloc_urb(0, GFP_KERNEL);
341 if (!urb) {
342 err = -ENOMEM;
343 break;
344 }
345
346 buf = usb_alloc_coherent(dev->udev, KVASER_USB_RX_BUFFER_SIZE,
347 GFP_KERNEL, &buf_dma);
348 if (!buf) {
349 dev_warn(&dev->intf->dev,
350 "No memory left for USB buffer\n");
351 usb_free_urb(urb);
352 err = -ENOMEM;
353 break;
354 }
355
356 usb_fill_bulk_urb(urb, dev->udev,
357 usb_rcvbulkpipe
358 (dev->udev,
359 dev->bulk_in->bEndpointAddress),
360 buf, KVASER_USB_RX_BUFFER_SIZE,
361 kvaser_usb_read_bulk_callback, dev);
362 urb->transfer_dma = buf_dma;
363 urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
364 usb_anchor_urb(urb, &dev->rx_submitted);
365
366 err = usb_submit_urb(urb, GFP_KERNEL);
367 if (err) {
368 usb_unanchor_urb(urb);
369 usb_free_coherent(dev->udev,
370 KVASER_USB_RX_BUFFER_SIZE, buf,
371 buf_dma);
372 usb_free_urb(urb);
373 break;
374 }
375
376 dev->rxbuf[i] = buf;
377 dev->rxbuf_dma[i] = buf_dma;
378
379 usb_free_urb(urb);
380 }
381
382 if (i == 0) {
383 dev_warn(&dev->intf->dev, "Cannot setup read URBs, error %d\n",
384 err);
385 return err;
386 } else if (i < KVASER_USB_MAX_RX_URBS) {
387 dev_warn(&dev->intf->dev, "RX performances may be slow\n");
388 }
389
390 dev->rxinitdone = true;
391
392 return 0;
393}
394
395static int kvaser_usb_open(struct net_device *netdev)
396{
397 struct kvaser_usb_net_priv *priv = netdev_priv(netdev);
398 struct kvaser_usb *dev = priv->dev;
399 int err;
400
401 err = open_candev(netdev);
402 if (err)
403 return err;
404
405 err = kvaser_usb_setup_rx_urbs(dev);
406 if (err)
407 goto error;
408
409 err = dev->ops->dev_set_opt_mode(priv);
410 if (err)
411 goto error;
412
413 err = dev->ops->dev_start_chip(priv);
414 if (err) {
415 netdev_warn(netdev, "Cannot start device, error %d\n", err);
416 goto error;
417 }
418
419 priv->can.state = CAN_STATE_ERROR_ACTIVE;
420
421 return 0;
422
423error:
424 close_candev(netdev);
425 return err;
426}
427
428static void kvaser_usb_reset_tx_urb_contexts(struct kvaser_usb_net_priv *priv)
429{
430 int i, max_tx_urbs;
431
432 max_tx_urbs = priv->dev->max_tx_urbs;
433
434 priv->active_tx_contexts = 0;
435 for (i = 0; i < max_tx_urbs; i++)
436 priv->tx_contexts[i].echo_index = max_tx_urbs;
437}
438
439
440
441
442static void kvaser_usb_unlink_tx_urbs(struct kvaser_usb_net_priv *priv)
443{
444 usb_kill_anchored_urbs(&priv->tx_submitted);
445 kvaser_usb_reset_tx_urb_contexts(priv);
446}
447
448static void kvaser_usb_unlink_all_urbs(struct kvaser_usb *dev)
449{
450 int i;
451
452 usb_kill_anchored_urbs(&dev->rx_submitted);
453
454 for (i = 0; i < KVASER_USB_MAX_RX_URBS; i++)
455 usb_free_coherent(dev->udev, KVASER_USB_RX_BUFFER_SIZE,
456 dev->rxbuf[i], dev->rxbuf_dma[i]);
457
458 for (i = 0; i < dev->nchannels; i++) {
459 struct kvaser_usb_net_priv *priv = dev->nets[i];
460
461 if (priv)
462 kvaser_usb_unlink_tx_urbs(priv);
463 }
464}
465
466static int kvaser_usb_close(struct net_device *netdev)
467{
468 struct kvaser_usb_net_priv *priv = netdev_priv(netdev);
469 struct kvaser_usb *dev = priv->dev;
470 int err;
471
472 netif_stop_queue(netdev);
473
474 err = dev->ops->dev_flush_queue(priv);
475 if (err)
476 netdev_warn(netdev, "Cannot flush queue, error %d\n", err);
477
478 if (dev->ops->dev_reset_chip) {
479 err = dev->ops->dev_reset_chip(dev, priv->channel);
480 if (err)
481 netdev_warn(netdev, "Cannot reset card, error %d\n",
482 err);
483 }
484
485 err = dev->ops->dev_stop_chip(priv);
486 if (err)
487 netdev_warn(netdev, "Cannot stop device, error %d\n", err);
488
489
490 kvaser_usb_unlink_tx_urbs(priv);
491
492 priv->can.state = CAN_STATE_STOPPED;
493 close_candev(priv->netdev);
494
495 return 0;
496}
497
498static void kvaser_usb_write_bulk_callback(struct urb *urb)
499{
500 struct kvaser_usb_tx_urb_context *context = urb->context;
501 struct kvaser_usb_net_priv *priv;
502 struct net_device *netdev;
503
504 if (WARN_ON(!context))
505 return;
506
507 priv = context->priv;
508 netdev = priv->netdev;
509
510 kfree(urb->transfer_buffer);
511
512 if (!netif_device_present(netdev))
513 return;
514
515 if (urb->status)
516 netdev_info(netdev, "Tx URB aborted (%d)\n", urb->status);
517}
518
519static netdev_tx_t kvaser_usb_start_xmit(struct sk_buff *skb,
520 struct net_device *netdev)
521{
522 struct kvaser_usb_net_priv *priv = netdev_priv(netdev);
523 struct kvaser_usb *dev = priv->dev;
524 struct net_device_stats *stats = &netdev->stats;
525 struct kvaser_usb_tx_urb_context *context = NULL;
526 struct urb *urb;
527 void *buf;
528 int cmd_len = 0;
529 int err, ret = NETDEV_TX_OK;
530 unsigned int i;
531 unsigned long flags;
532
533 if (can_dropped_invalid_skb(netdev, skb))
534 return NETDEV_TX_OK;
535
536 urb = usb_alloc_urb(0, GFP_ATOMIC);
537 if (!urb) {
538 stats->tx_dropped++;
539 dev_kfree_skb(skb);
540 return NETDEV_TX_OK;
541 }
542
543 spin_lock_irqsave(&priv->tx_contexts_lock, flags);
544 for (i = 0; i < dev->max_tx_urbs; i++) {
545 if (priv->tx_contexts[i].echo_index == dev->max_tx_urbs) {
546 context = &priv->tx_contexts[i];
547
548 context->echo_index = i;
549 ++priv->active_tx_contexts;
550 if (priv->active_tx_contexts >= (int)dev->max_tx_urbs)
551 netif_stop_queue(netdev);
552
553 break;
554 }
555 }
556 spin_unlock_irqrestore(&priv->tx_contexts_lock, flags);
557
558
559 if (!context) {
560 netdev_warn(netdev, "cannot find free context\n");
561
562 ret = NETDEV_TX_BUSY;
563 goto freeurb;
564 }
565
566 buf = dev->ops->dev_frame_to_cmd(priv, skb, &context->dlc, &cmd_len,
567 context->echo_index);
568 if (!buf) {
569 stats->tx_dropped++;
570 dev_kfree_skb(skb);
571 spin_lock_irqsave(&priv->tx_contexts_lock, flags);
572
573 context->echo_index = dev->max_tx_urbs;
574 --priv->active_tx_contexts;
575 netif_wake_queue(netdev);
576
577 spin_unlock_irqrestore(&priv->tx_contexts_lock, flags);
578 goto freeurb;
579 }
580
581 context->priv = priv;
582
583 can_put_echo_skb(skb, netdev, context->echo_index, 0);
584
585 usb_fill_bulk_urb(urb, dev->udev,
586 usb_sndbulkpipe(dev->udev,
587 dev->bulk_out->bEndpointAddress),
588 buf, cmd_len, kvaser_usb_write_bulk_callback,
589 context);
590 usb_anchor_urb(urb, &priv->tx_submitted);
591
592 err = usb_submit_urb(urb, GFP_ATOMIC);
593 if (unlikely(err)) {
594 spin_lock_irqsave(&priv->tx_contexts_lock, flags);
595
596 can_free_echo_skb(netdev, context->echo_index, NULL);
597 context->echo_index = dev->max_tx_urbs;
598 --priv->active_tx_contexts;
599 netif_wake_queue(netdev);
600
601 spin_unlock_irqrestore(&priv->tx_contexts_lock, flags);
602
603 usb_unanchor_urb(urb);
604 kfree(buf);
605
606 stats->tx_dropped++;
607
608 if (err == -ENODEV)
609 netif_device_detach(netdev);
610 else
611 netdev_warn(netdev, "Failed tx_urb %d\n", err);
612
613 goto freeurb;
614 }
615
616 ret = NETDEV_TX_OK;
617
618freeurb:
619 usb_free_urb(urb);
620 return ret;
621}
622
623static const struct net_device_ops kvaser_usb_netdev_ops = {
624 .ndo_open = kvaser_usb_open,
625 .ndo_stop = kvaser_usb_close,
626 .ndo_start_xmit = kvaser_usb_start_xmit,
627 .ndo_change_mtu = can_change_mtu,
628};
629
630static void kvaser_usb_remove_interfaces(struct kvaser_usb *dev)
631{
632 int i;
633
634 for (i = 0; i < dev->nchannels; i++) {
635 if (!dev->nets[i])
636 continue;
637
638 unregister_candev(dev->nets[i]->netdev);
639 }
640
641 kvaser_usb_unlink_all_urbs(dev);
642
643 for (i = 0; i < dev->nchannels; i++) {
644 if (!dev->nets[i])
645 continue;
646
647 free_candev(dev->nets[i]->netdev);
648 }
649}
650
651static int kvaser_usb_init_one(struct kvaser_usb *dev,
652 const struct usb_device_id *id, int channel)
653{
654 struct net_device *netdev;
655 struct kvaser_usb_net_priv *priv;
656 int err;
657
658 if (dev->ops->dev_reset_chip) {
659 err = dev->ops->dev_reset_chip(dev, channel);
660 if (err)
661 return err;
662 }
663
664 netdev = alloc_candev(struct_size(priv, tx_contexts, dev->max_tx_urbs),
665 dev->max_tx_urbs);
666 if (!netdev) {
667 dev_err(&dev->intf->dev, "Cannot alloc candev\n");
668 return -ENOMEM;
669 }
670
671 priv = netdev_priv(netdev);
672
673 init_usb_anchor(&priv->tx_submitted);
674 init_completion(&priv->start_comp);
675 init_completion(&priv->stop_comp);
676 priv->can.ctrlmode_supported = 0;
677
678 priv->dev = dev;
679 priv->netdev = netdev;
680 priv->channel = channel;
681
682 spin_lock_init(&priv->tx_contexts_lock);
683 kvaser_usb_reset_tx_urb_contexts(priv);
684
685 priv->can.state = CAN_STATE_STOPPED;
686 priv->can.clock.freq = dev->cfg->clock.freq;
687 priv->can.bittiming_const = dev->cfg->bittiming_const;
688 priv->can.do_set_bittiming = dev->ops->dev_set_bittiming;
689 priv->can.do_set_mode = dev->ops->dev_set_mode;
690 if ((id->driver_info & KVASER_USB_HAS_TXRX_ERRORS) ||
691 (priv->dev->card_data.capabilities & KVASER_USB_CAP_BERR_CAP))
692 priv->can.do_get_berr_counter = dev->ops->dev_get_berr_counter;
693 if (id->driver_info & KVASER_USB_HAS_SILENT_MODE)
694 priv->can.ctrlmode_supported |= CAN_CTRLMODE_LISTENONLY;
695
696 priv->can.ctrlmode_supported |= dev->card_data.ctrlmode_supported;
697
698 if (priv->can.ctrlmode_supported & CAN_CTRLMODE_FD) {
699 priv->can.data_bittiming_const = dev->cfg->data_bittiming_const;
700 priv->can.do_set_data_bittiming =
701 dev->ops->dev_set_data_bittiming;
702 }
703
704 netdev->flags |= IFF_ECHO;
705
706 netdev->netdev_ops = &kvaser_usb_netdev_ops;
707
708 SET_NETDEV_DEV(netdev, &dev->intf->dev);
709 netdev->dev_id = channel;
710
711 dev->nets[channel] = priv;
712
713 err = register_candev(netdev);
714 if (err) {
715 dev_err(&dev->intf->dev, "Failed to register CAN device\n");
716 free_candev(netdev);
717 dev->nets[channel] = NULL;
718 return err;
719 }
720
721 netdev_dbg(netdev, "device registered\n");
722
723 return 0;
724}
725
726static int kvaser_usb_probe(struct usb_interface *intf,
727 const struct usb_device_id *id)
728{
729 struct kvaser_usb *dev;
730 int err;
731 int i;
732
733 dev = devm_kzalloc(&intf->dev, sizeof(*dev), GFP_KERNEL);
734 if (!dev)
735 return -ENOMEM;
736
737 if (kvaser_is_leaf(id)) {
738 dev->card_data.leaf.family = KVASER_LEAF;
739 dev->ops = &kvaser_usb_leaf_dev_ops;
740 } else if (kvaser_is_usbcan(id)) {
741 dev->card_data.leaf.family = KVASER_USBCAN;
742 dev->ops = &kvaser_usb_leaf_dev_ops;
743 } else if (kvaser_is_hydra(id)) {
744 dev->ops = &kvaser_usb_hydra_dev_ops;
745 } else {
746 dev_err(&intf->dev,
747 "Product ID (%d) is not a supported Kvaser USB device\n",
748 id->idProduct);
749 return -ENODEV;
750 }
751
752 dev->intf = intf;
753
754 err = dev->ops->dev_setup_endpoints(dev);
755 if (err) {
756 dev_err(&intf->dev, "Cannot get usb endpoint(s)");
757 return err;
758 }
759
760 dev->udev = interface_to_usbdev(intf);
761
762 init_usb_anchor(&dev->rx_submitted);
763
764 usb_set_intfdata(intf, dev);
765
766 dev->card_data.ctrlmode_supported = 0;
767 dev->card_data.capabilities = 0;
768 err = dev->ops->dev_init_card(dev);
769 if (err) {
770 dev_err(&intf->dev,
771 "Failed to initialize card, error %d\n", err);
772 return err;
773 }
774
775 err = dev->ops->dev_get_software_info(dev);
776 if (err) {
777 dev_err(&intf->dev,
778 "Cannot get software info, error %d\n", err);
779 return err;
780 }
781
782 if (dev->ops->dev_get_software_details) {
783 err = dev->ops->dev_get_software_details(dev);
784 if (err) {
785 dev_err(&intf->dev,
786 "Cannot get software details, error %d\n", err);
787 return err;
788 }
789 }
790
791 if (WARN_ON(!dev->cfg))
792 return -ENODEV;
793
794 dev_dbg(&intf->dev, "Firmware version: %d.%d.%d\n",
795 ((dev->fw_version >> 24) & 0xff),
796 ((dev->fw_version >> 16) & 0xff),
797 (dev->fw_version & 0xffff));
798
799 dev_dbg(&intf->dev, "Max outstanding tx = %d URBs\n", dev->max_tx_urbs);
800
801 err = dev->ops->dev_get_card_info(dev);
802 if (err) {
803 dev_err(&intf->dev, "Cannot get card info, error %d\n", err);
804 return err;
805 }
806
807 if (dev->ops->dev_get_capabilities) {
808 err = dev->ops->dev_get_capabilities(dev);
809 if (err) {
810 dev_err(&intf->dev,
811 "Cannot get capabilities, error %d\n", err);
812 kvaser_usb_remove_interfaces(dev);
813 return err;
814 }
815 }
816
817 for (i = 0; i < dev->nchannels; i++) {
818 err = kvaser_usb_init_one(dev, id, i);
819 if (err) {
820 kvaser_usb_remove_interfaces(dev);
821 return err;
822 }
823 }
824
825 return 0;
826}
827
828static void kvaser_usb_disconnect(struct usb_interface *intf)
829{
830 struct kvaser_usb *dev = usb_get_intfdata(intf);
831
832 usb_set_intfdata(intf, NULL);
833
834 if (!dev)
835 return;
836
837 kvaser_usb_remove_interfaces(dev);
838}
839
840static struct usb_driver kvaser_usb_driver = {
841 .name = "kvaser_usb",
842 .probe = kvaser_usb_probe,
843 .disconnect = kvaser_usb_disconnect,
844 .id_table = kvaser_usb_table,
845};
846
847module_usb_driver(kvaser_usb_driver);
848
849MODULE_AUTHOR("Olivier Sobrie <olivier@sobrie.be>");
850MODULE_AUTHOR("Kvaser AB <support@kvaser.com>");
851MODULE_DESCRIPTION("CAN driver for Kvaser CAN/USB devices");
852MODULE_LICENSE("GPL v2");
853
