1 // SPDX-License-Identifier: GPL-2.0
2 /* Parts of this driver are based on the following:
3 * - Kvaser linux leaf driver (version 4.78)
4 * - CAN driver for esd CAN-USB/2
5 * - Kvaser linux usbcanII driver (version 5.3)
6 * - Kvaser linux mhydra driver (version 5.24)
7 *
8 * Copyright (C) 2002-2018 KVASER AB, Sweden. All rights reserved.
9 * Copyright (C) 2010 Matthias Fuchs <matthias.fuchs@esd.eu>, esd gmbh
10 * Copyright (C) 2012 Olivier Sobrie <olivier@sobrie.be>
11 * Copyright (C) 2015 Valeo S.A.
12 */
13
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 /* Kvaser USB vendor id. */
33 #define KVASER_VENDOR_ID 0x0bfd
34
35 /* Kvaser Leaf USB devices product ids */
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 /* Kvaser USBCan-II devices product ids */
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 /* Kvaser Minihydra USB devices product ids */
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_2CANLIN_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_2CANLIN_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_HYBRID_CANLIN_PRODUCT_ID 277
91 #define USB_HYBRID_PRO_CANLIN_PRODUCT_ID 278
92 #define USB_HYDRA_PRODUCT_ID_END \
93 USB_HYBRID_PRO_CANLIN_PRODUCT_ID
94
kvaser_is_leaf(const struct usb_device_id * id)95 static inline bool kvaser_is_leaf(const struct usb_device_id *id)
96 {
97 return (id->idProduct >= USB_LEAF_DEVEL_PRODUCT_ID &&
98 id->idProduct <= USB_CAN_R_PRODUCT_ID) ||
99 (id->idProduct >= USB_LEAF_LITE_V2_PRODUCT_ID &&
100 id->idProduct <= USB_LEAF_PRODUCT_ID_END);
101 }
102
kvaser_is_usbcan(const struct usb_device_id * id)103 static inline bool kvaser_is_usbcan(const struct usb_device_id *id)
104 {
105 return id->idProduct >= USB_USBCAN_REVB_PRODUCT_ID &&
106 id->idProduct <= USB_MEMORATOR_PRODUCT_ID;
107 }
108
kvaser_is_hydra(const struct usb_device_id * id)109 static inline bool kvaser_is_hydra(const struct usb_device_id *id)
110 {
111 return id->idProduct >= USB_BLACKBIRD_V2_PRODUCT_ID &&
112 id->idProduct <= USB_HYDRA_PRODUCT_ID_END;
113 }
114
115 static const struct usb_device_id kvaser_usb_table[] = {
116 /* Leaf USB product IDs */
117 { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_DEVEL_PRODUCT_ID) },
118 { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_LITE_PRODUCT_ID) },
119 { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_PRO_PRODUCT_ID),
120 .driver_info = KVASER_USB_HAS_TXRX_ERRORS |
121 KVASER_USB_HAS_SILENT_MODE },
122 { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_SPRO_PRODUCT_ID),
123 .driver_info = KVASER_USB_HAS_TXRX_ERRORS |
124 KVASER_USB_HAS_SILENT_MODE },
125 { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_PRO_LS_PRODUCT_ID),
126 .driver_info = KVASER_USB_HAS_TXRX_ERRORS |
127 KVASER_USB_HAS_SILENT_MODE },
128 { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_PRO_SWC_PRODUCT_ID),
129 .driver_info = KVASER_USB_HAS_TXRX_ERRORS |
130 KVASER_USB_HAS_SILENT_MODE },
131 { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_PRO_LIN_PRODUCT_ID),
132 .driver_info = KVASER_USB_HAS_TXRX_ERRORS |
133 KVASER_USB_HAS_SILENT_MODE },
134 { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_SPRO_LS_PRODUCT_ID),
135 .driver_info = KVASER_USB_HAS_TXRX_ERRORS |
136 KVASER_USB_HAS_SILENT_MODE },
137 { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_SPRO_SWC_PRODUCT_ID),
138 .driver_info = KVASER_USB_HAS_TXRX_ERRORS |
139 KVASER_USB_HAS_SILENT_MODE },
140 { USB_DEVICE(KVASER_VENDOR_ID, USB_MEMO2_DEVEL_PRODUCT_ID),
141 .driver_info = KVASER_USB_HAS_TXRX_ERRORS |
142 KVASER_USB_HAS_SILENT_MODE },
143 { USB_DEVICE(KVASER_VENDOR_ID, USB_MEMO2_HSHS_PRODUCT_ID),
144 .driver_info = KVASER_USB_HAS_TXRX_ERRORS |
145 KVASER_USB_HAS_SILENT_MODE },
146 { USB_DEVICE(KVASER_VENDOR_ID, USB_UPRO_HSHS_PRODUCT_ID),
147 .driver_info = KVASER_USB_HAS_TXRX_ERRORS },
148 { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_LITE_GI_PRODUCT_ID) },
149 { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_PRO_OBDII_PRODUCT_ID),
150 .driver_info = KVASER_USB_HAS_TXRX_ERRORS |
151 KVASER_USB_HAS_SILENT_MODE },
152 { USB_DEVICE(KVASER_VENDOR_ID, USB_MEMO2_HSLS_PRODUCT_ID),
153 .driver_info = KVASER_USB_HAS_TXRX_ERRORS },
154 { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_LITE_CH_PRODUCT_ID),
155 .driver_info = KVASER_USB_HAS_TXRX_ERRORS },
156 { USB_DEVICE(KVASER_VENDOR_ID, USB_BLACKBIRD_SPRO_PRODUCT_ID),
157 .driver_info = KVASER_USB_HAS_TXRX_ERRORS },
158 { USB_DEVICE(KVASER_VENDOR_ID, USB_OEM_MERCURY_PRODUCT_ID),
159 .driver_info = KVASER_USB_HAS_TXRX_ERRORS },
160 { USB_DEVICE(KVASER_VENDOR_ID, USB_OEM_LEAF_PRODUCT_ID),
161 .driver_info = KVASER_USB_HAS_TXRX_ERRORS },
162 { USB_DEVICE(KVASER_VENDOR_ID, USB_CAN_R_PRODUCT_ID),
163 .driver_info = KVASER_USB_HAS_TXRX_ERRORS },
164 { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_LITE_V2_PRODUCT_ID) },
165 { USB_DEVICE(KVASER_VENDOR_ID, USB_MINI_PCIE_HS_PRODUCT_ID) },
166 { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_LIGHT_HS_V2_OEM_PRODUCT_ID) },
167 { USB_DEVICE(KVASER_VENDOR_ID, USB_USBCAN_LIGHT_2HS_PRODUCT_ID) },
168 { USB_DEVICE(KVASER_VENDOR_ID, USB_MINI_PCIE_2HS_PRODUCT_ID) },
169 { USB_DEVICE(KVASER_VENDOR_ID, USB_USBCAN_R_V2_PRODUCT_ID) },
170 { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_LIGHT_R_V2_PRODUCT_ID) },
171 { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_LIGHT_HS_V2_OEM2_PRODUCT_ID) },
172
173 /* USBCANII USB product IDs */
174 { USB_DEVICE(KVASER_VENDOR_ID, USB_USBCAN2_PRODUCT_ID),
175 .driver_info = KVASER_USB_HAS_TXRX_ERRORS },
176 { USB_DEVICE(KVASER_VENDOR_ID, USB_USBCAN_REVB_PRODUCT_ID),
177 .driver_info = KVASER_USB_HAS_TXRX_ERRORS },
178 { USB_DEVICE(KVASER_VENDOR_ID, USB_MEMORATOR_PRODUCT_ID),
179 .driver_info = KVASER_USB_HAS_TXRX_ERRORS },
180 { USB_DEVICE(KVASER_VENDOR_ID, USB_VCI2_PRODUCT_ID),
181 .driver_info = KVASER_USB_HAS_TXRX_ERRORS },
182
183 /* Minihydra USB product IDs */
184 { USB_DEVICE(KVASER_VENDOR_ID, USB_BLACKBIRD_V2_PRODUCT_ID) },
185 { USB_DEVICE(KVASER_VENDOR_ID, USB_MEMO_PRO_5HS_PRODUCT_ID) },
186 { USB_DEVICE(KVASER_VENDOR_ID, USB_USBCAN_PRO_5HS_PRODUCT_ID) },
187 { USB_DEVICE(KVASER_VENDOR_ID, USB_USBCAN_LIGHT_4HS_PRODUCT_ID) },
188 { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_PRO_HS_V2_PRODUCT_ID) },
189 { USB_DEVICE(KVASER_VENDOR_ID, USB_USBCAN_PRO_2HS_V2_PRODUCT_ID) },
190 { USB_DEVICE(KVASER_VENDOR_ID, USB_MEMO_2HS_PRODUCT_ID) },
191 { USB_DEVICE(KVASER_VENDOR_ID, USB_MEMO_PRO_2HS_V2_PRODUCT_ID) },
192 { USB_DEVICE(KVASER_VENDOR_ID, USB_HYBRID_2CANLIN_PRODUCT_ID) },
193 { USB_DEVICE(KVASER_VENDOR_ID, USB_ATI_USBCAN_PRO_2HS_V2_PRODUCT_ID) },
194 { USB_DEVICE(KVASER_VENDOR_ID, USB_ATI_MEMO_PRO_2HS_V2_PRODUCT_ID) },
195 { USB_DEVICE(KVASER_VENDOR_ID, USB_HYBRID_PRO_2CANLIN_PRODUCT_ID) },
196 { USB_DEVICE(KVASER_VENDOR_ID, USB_U100_PRODUCT_ID) },
197 { USB_DEVICE(KVASER_VENDOR_ID, USB_U100P_PRODUCT_ID) },
198 { USB_DEVICE(KVASER_VENDOR_ID, USB_U100S_PRODUCT_ID) },
199 { USB_DEVICE(KVASER_VENDOR_ID, USB_USBCAN_PRO_4HS_PRODUCT_ID) },
200 { USB_DEVICE(KVASER_VENDOR_ID, USB_HYBRID_CANLIN_PRODUCT_ID) },
201 { USB_DEVICE(KVASER_VENDOR_ID, USB_HYBRID_PRO_CANLIN_PRODUCT_ID) },
202 { }
203 };
204 MODULE_DEVICE_TABLE(usb, kvaser_usb_table);
205
kvaser_usb_send_cmd(const struct kvaser_usb * dev,void * cmd,int len)206 int kvaser_usb_send_cmd(const struct kvaser_usb *dev, void *cmd, int len)
207 {
208 int actual_len; /* Not used */
209
210 return usb_bulk_msg(dev->udev,
211 usb_sndbulkpipe(dev->udev,
212 dev->bulk_out->bEndpointAddress),
213 cmd, len, &actual_len, KVASER_USB_TIMEOUT);
214 }
215
kvaser_usb_recv_cmd(const struct kvaser_usb * dev,void * cmd,int len,int * actual_len)216 int kvaser_usb_recv_cmd(const struct kvaser_usb *dev, void *cmd, int len,
217 int *actual_len)
218 {
219 return usb_bulk_msg(dev->udev,
220 usb_rcvbulkpipe(dev->udev,
221 dev->bulk_in->bEndpointAddress),
222 cmd, len, actual_len, KVASER_USB_TIMEOUT);
223 }
224
kvaser_usb_send_cmd_callback(struct urb * urb)225 static void kvaser_usb_send_cmd_callback(struct urb *urb)
226 {
227 struct net_device *netdev = urb->context;
228
229 kfree(urb->transfer_buffer);
230
231 if (urb->status)
232 netdev_warn(netdev, "urb status received: %d\n", urb->status);
233 }
234
kvaser_usb_send_cmd_async(struct kvaser_usb_net_priv * priv,void * cmd,int len)235 int kvaser_usb_send_cmd_async(struct kvaser_usb_net_priv *priv, void *cmd,
236 int len)
237 {
238 struct kvaser_usb *dev = priv->dev;
239 struct net_device *netdev = priv->netdev;
240 struct urb *urb;
241 int err;
242
243 urb = usb_alloc_urb(0, GFP_ATOMIC);
244 if (!urb)
245 return -ENOMEM;
246
247 usb_fill_bulk_urb(urb, dev->udev,
248 usb_sndbulkpipe(dev->udev,
249 dev->bulk_out->bEndpointAddress),
250 cmd, len, kvaser_usb_send_cmd_callback, netdev);
251 usb_anchor_urb(urb, &priv->tx_submitted);
252
253 err = usb_submit_urb(urb, GFP_ATOMIC);
254 if (err) {
255 netdev_err(netdev, "Error transmitting URB\n");
256 usb_unanchor_urb(urb);
257 }
258 usb_free_urb(urb);
259
260 return 0;
261 }
262
kvaser_usb_can_rx_over_error(struct net_device * netdev)263 int kvaser_usb_can_rx_over_error(struct net_device *netdev)
264 {
265 struct net_device_stats *stats = &netdev->stats;
266 struct can_frame *cf;
267 struct sk_buff *skb;
268
269 stats->rx_over_errors++;
270 stats->rx_errors++;
271
272 skb = alloc_can_err_skb(netdev, &cf);
273 if (!skb) {
274 stats->rx_dropped++;
275 netdev_warn(netdev, "No memory left for err_skb\n");
276 return -ENOMEM;
277 }
278
279 cf->can_id |= CAN_ERR_CRTL;
280 cf->data[1] = CAN_ERR_CRTL_RX_OVERFLOW;
281
282 stats->rx_packets++;
283 stats->rx_bytes += cf->len;
284 netif_rx(skb);
285
286 return 0;
287 }
288
kvaser_usb_read_bulk_callback(struct urb * urb)289 static void kvaser_usb_read_bulk_callback(struct urb *urb)
290 {
291 struct kvaser_usb *dev = urb->context;
292 int err;
293 unsigned int i;
294
295 switch (urb->status) {
296 case 0:
297 break;
298 case -ENOENT:
299 case -EPIPE:
300 case -EPROTO:
301 case -ESHUTDOWN:
302 return;
303 default:
304 dev_info(&dev->intf->dev, "Rx URB aborted (%d)\n", urb->status);
305 goto resubmit_urb;
306 }
307
308 dev->ops->dev_read_bulk_callback(dev, urb->transfer_buffer,
309 urb->actual_length);
310
311 resubmit_urb:
312 usb_fill_bulk_urb(urb, dev->udev,
313 usb_rcvbulkpipe(dev->udev,
314 dev->bulk_in->bEndpointAddress),
315 urb->transfer_buffer, KVASER_USB_RX_BUFFER_SIZE,
316 kvaser_usb_read_bulk_callback, dev);
317
318 err = usb_submit_urb(urb, GFP_ATOMIC);
319 if (err == -ENODEV) {
320 for (i = 0; i < dev->nchannels; i++) {
321 if (!dev->nets[i])
322 continue;
323
324 netif_device_detach(dev->nets[i]->netdev);
325 }
326 } else if (err) {
327 dev_err(&dev->intf->dev,
328 "Failed resubmitting read bulk urb: %d\n", err);
329 }
330 }
331
kvaser_usb_setup_rx_urbs(struct kvaser_usb * dev)332 static int kvaser_usb_setup_rx_urbs(struct kvaser_usb *dev)
333 {
334 int i, err = 0;
335
336 if (dev->rxinitdone)
337 return 0;
338
339 for (i = 0; i < KVASER_USB_MAX_RX_URBS; i++) {
340 struct urb *urb = NULL;
341 u8 *buf = NULL;
342 dma_addr_t buf_dma;
343
344 urb = usb_alloc_urb(0, GFP_KERNEL);
345 if (!urb) {
346 err = -ENOMEM;
347 break;
348 }
349
350 buf = usb_alloc_coherent(dev->udev, KVASER_USB_RX_BUFFER_SIZE,
351 GFP_KERNEL, &buf_dma);
352 if (!buf) {
353 dev_warn(&dev->intf->dev,
354 "No memory left for USB buffer\n");
355 usb_free_urb(urb);
356 err = -ENOMEM;
357 break;
358 }
359
360 usb_fill_bulk_urb(urb, dev->udev,
361 usb_rcvbulkpipe
362 (dev->udev,
363 dev->bulk_in->bEndpointAddress),
364 buf, KVASER_USB_RX_BUFFER_SIZE,
365 kvaser_usb_read_bulk_callback, dev);
366 urb->transfer_dma = buf_dma;
367 urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
368 usb_anchor_urb(urb, &dev->rx_submitted);
369
370 err = usb_submit_urb(urb, GFP_KERNEL);
371 if (err) {
372 usb_unanchor_urb(urb);
373 usb_free_coherent(dev->udev,
374 KVASER_USB_RX_BUFFER_SIZE, buf,
375 buf_dma);
376 usb_free_urb(urb);
377 break;
378 }
379
380 dev->rxbuf[i] = buf;
381 dev->rxbuf_dma[i] = buf_dma;
382
383 usb_free_urb(urb);
384 }
385
386 if (i == 0) {
387 dev_warn(&dev->intf->dev, "Cannot setup read URBs, error %d\n",
388 err);
389 return err;
390 } else if (i < KVASER_USB_MAX_RX_URBS) {
391 dev_warn(&dev->intf->dev, "RX performances may be slow\n");
392 }
393
394 dev->rxinitdone = true;
395
396 return 0;
397 }
398
kvaser_usb_open(struct net_device * netdev)399 static int kvaser_usb_open(struct net_device *netdev)
400 {
401 struct kvaser_usb_net_priv *priv = netdev_priv(netdev);
402 struct kvaser_usb *dev = priv->dev;
403 int err;
404
405 err = open_candev(netdev);
406 if (err)
407 return err;
408
409 err = kvaser_usb_setup_rx_urbs(dev);
410 if (err)
411 goto error;
412
413 err = dev->ops->dev_set_opt_mode(priv);
414 if (err)
415 goto error;
416
417 err = dev->ops->dev_start_chip(priv);
418 if (err) {
419 netdev_warn(netdev, "Cannot start device, error %d\n", err);
420 goto error;
421 }
422
423 priv->can.state = CAN_STATE_ERROR_ACTIVE;
424
425 return 0;
426
427 error:
428 close_candev(netdev);
429 return err;
430 }
431
kvaser_usb_reset_tx_urb_contexts(struct kvaser_usb_net_priv * priv)432 static void kvaser_usb_reset_tx_urb_contexts(struct kvaser_usb_net_priv *priv)
433 {
434 int i, max_tx_urbs;
435
436 max_tx_urbs = priv->dev->max_tx_urbs;
437
438 priv->active_tx_contexts = 0;
439 for (i = 0; i < max_tx_urbs; i++)
440 priv->tx_contexts[i].echo_index = max_tx_urbs;
441 }
442
443 /* This method might sleep. Do not call it in the atomic context
444 * of URB completions.
445 */
kvaser_usb_unlink_tx_urbs(struct kvaser_usb_net_priv * priv)446 static void kvaser_usb_unlink_tx_urbs(struct kvaser_usb_net_priv *priv)
447 {
448 usb_kill_anchored_urbs(&priv->tx_submitted);
449 kvaser_usb_reset_tx_urb_contexts(priv);
450 }
451
kvaser_usb_unlink_all_urbs(struct kvaser_usb * dev)452 static void kvaser_usb_unlink_all_urbs(struct kvaser_usb *dev)
453 {
454 int i;
455
456 usb_kill_anchored_urbs(&dev->rx_submitted);
457
458 for (i = 0; i < KVASER_USB_MAX_RX_URBS; i++)
459 usb_free_coherent(dev->udev, KVASER_USB_RX_BUFFER_SIZE,
460 dev->rxbuf[i], dev->rxbuf_dma[i]);
461
462 for (i = 0; i < dev->nchannels; i++) {
463 struct kvaser_usb_net_priv *priv = dev->nets[i];
464
465 if (priv)
466 kvaser_usb_unlink_tx_urbs(priv);
467 }
468 }
469
kvaser_usb_close(struct net_device * netdev)470 static int kvaser_usb_close(struct net_device *netdev)
471 {
472 struct kvaser_usb_net_priv *priv = netdev_priv(netdev);
473 struct kvaser_usb *dev = priv->dev;
474 int err;
475
476 netif_stop_queue(netdev);
477
478 err = dev->ops->dev_flush_queue(priv);
479 if (err)
480 netdev_warn(netdev, "Cannot flush queue, error %d\n", err);
481
482 if (dev->ops->dev_reset_chip) {
483 err = dev->ops->dev_reset_chip(dev, priv->channel);
484 if (err)
485 netdev_warn(netdev, "Cannot reset card, error %d\n",
486 err);
487 }
488
489 err = dev->ops->dev_stop_chip(priv);
490 if (err)
491 netdev_warn(netdev, "Cannot stop device, error %d\n", err);
492
493 /* reset tx contexts */
494 kvaser_usb_unlink_tx_urbs(priv);
495
496 priv->can.state = CAN_STATE_STOPPED;
497 close_candev(priv->netdev);
498
499 return 0;
500 }
501
kvaser_usb_write_bulk_callback(struct urb * urb)502 static void kvaser_usb_write_bulk_callback(struct urb *urb)
503 {
504 struct kvaser_usb_tx_urb_context *context = urb->context;
505 struct kvaser_usb_net_priv *priv;
506 struct net_device *netdev;
507
508 if (WARN_ON(!context))
509 return;
510
511 priv = context->priv;
512 netdev = priv->netdev;
513
514 kfree(urb->transfer_buffer);
515
516 if (!netif_device_present(netdev))
517 return;
518
519 if (urb->status)
520 netdev_info(netdev, "Tx URB aborted (%d)\n", urb->status);
521 }
522
kvaser_usb_start_xmit(struct sk_buff * skb,struct net_device * netdev)523 static netdev_tx_t kvaser_usb_start_xmit(struct sk_buff *skb,
524 struct net_device *netdev)
525 {
526 struct kvaser_usb_net_priv *priv = netdev_priv(netdev);
527 struct kvaser_usb *dev = priv->dev;
528 struct net_device_stats *stats = &netdev->stats;
529 struct kvaser_usb_tx_urb_context *context = NULL;
530 struct urb *urb;
531 void *buf;
532 int cmd_len = 0;
533 int err, ret = NETDEV_TX_OK;
534 unsigned int i;
535 unsigned long flags;
536
537 if (can_dropped_invalid_skb(netdev, skb))
538 return NETDEV_TX_OK;
539
540 urb = usb_alloc_urb(0, GFP_ATOMIC);
541 if (!urb) {
542 stats->tx_dropped++;
543 dev_kfree_skb(skb);
544 return NETDEV_TX_OK;
545 }
546
547 spin_lock_irqsave(&priv->tx_contexts_lock, flags);
548 for (i = 0; i < dev->max_tx_urbs; i++) {
549 if (priv->tx_contexts[i].echo_index == dev->max_tx_urbs) {
550 context = &priv->tx_contexts[i];
551
552 context->echo_index = i;
553 ++priv->active_tx_contexts;
554 if (priv->active_tx_contexts >= (int)dev->max_tx_urbs)
555 netif_stop_queue(netdev);
556
557 break;
558 }
559 }
560 spin_unlock_irqrestore(&priv->tx_contexts_lock, flags);
561
562 /* This should never happen; it implies a flow control bug */
563 if (!context) {
564 netdev_warn(netdev, "cannot find free context\n");
565
566 ret = NETDEV_TX_BUSY;
567 goto freeurb;
568 }
569
570 buf = dev->ops->dev_frame_to_cmd(priv, skb, &context->dlc, &cmd_len,
571 context->echo_index);
572 if (!buf) {
573 stats->tx_dropped++;
574 dev_kfree_skb(skb);
575 spin_lock_irqsave(&priv->tx_contexts_lock, flags);
576
577 context->echo_index = dev->max_tx_urbs;
578 --priv->active_tx_contexts;
579 netif_wake_queue(netdev);
580
581 spin_unlock_irqrestore(&priv->tx_contexts_lock, flags);
582 goto freeurb;
583 }
584
585 context->priv = priv;
586
587 can_put_echo_skb(skb, netdev, context->echo_index, 0);
588
589 usb_fill_bulk_urb(urb, dev->udev,
590 usb_sndbulkpipe(dev->udev,
591 dev->bulk_out->bEndpointAddress),
592 buf, cmd_len, kvaser_usb_write_bulk_callback,
593 context);
594 usb_anchor_urb(urb, &priv->tx_submitted);
595
596 err = usb_submit_urb(urb, GFP_ATOMIC);
597 if (unlikely(err)) {
598 spin_lock_irqsave(&priv->tx_contexts_lock, flags);
599
600 can_free_echo_skb(netdev, context->echo_index, NULL);
601 context->echo_index = dev->max_tx_urbs;
602 --priv->active_tx_contexts;
603 netif_wake_queue(netdev);
604
605 spin_unlock_irqrestore(&priv->tx_contexts_lock, flags);
606
607 usb_unanchor_urb(urb);
608 kfree(buf);
609
610 stats->tx_dropped++;
611
612 if (err == -ENODEV)
613 netif_device_detach(netdev);
614 else
615 netdev_warn(netdev, "Failed tx_urb %d\n", err);
616
617 goto freeurb;
618 }
619
620 ret = NETDEV_TX_OK;
621
622 freeurb:
623 usb_free_urb(urb);
624 return ret;
625 }
626
627 static const struct net_device_ops kvaser_usb_netdev_ops = {
628 .ndo_open = kvaser_usb_open,
629 .ndo_stop = kvaser_usb_close,
630 .ndo_start_xmit = kvaser_usb_start_xmit,
631 .ndo_change_mtu = can_change_mtu,
632 };
633
kvaser_usb_remove_interfaces(struct kvaser_usb * dev)634 static void kvaser_usb_remove_interfaces(struct kvaser_usb *dev)
635 {
636 int i;
637
638 for (i = 0; i < dev->nchannels; i++) {
639 if (!dev->nets[i])
640 continue;
641
642 unregister_candev(dev->nets[i]->netdev);
643 }
644
645 kvaser_usb_unlink_all_urbs(dev);
646
647 for (i = 0; i < dev->nchannels; i++) {
648 if (!dev->nets[i])
649 continue;
650
651 free_candev(dev->nets[i]->netdev);
652 }
653 }
654
kvaser_usb_init_one(struct kvaser_usb * dev,const struct usb_device_id * id,int channel)655 static int kvaser_usb_init_one(struct kvaser_usb *dev,
656 const struct usb_device_id *id, int channel)
657 {
658 struct net_device *netdev;
659 struct kvaser_usb_net_priv *priv;
660 int err;
661
662 if (dev->ops->dev_reset_chip) {
663 err = dev->ops->dev_reset_chip(dev, channel);
664 if (err)
665 return err;
666 }
667
668 netdev = alloc_candev(struct_size(priv, tx_contexts, dev->max_tx_urbs),
669 dev->max_tx_urbs);
670 if (!netdev) {
671 dev_err(&dev->intf->dev, "Cannot alloc candev\n");
672 return -ENOMEM;
673 }
674
675 priv = netdev_priv(netdev);
676
677 init_usb_anchor(&priv->tx_submitted);
678 init_completion(&priv->start_comp);
679 init_completion(&priv->stop_comp);
680 priv->can.ctrlmode_supported = 0;
681
682 priv->dev = dev;
683 priv->netdev = netdev;
684 priv->channel = channel;
685
686 spin_lock_init(&priv->tx_contexts_lock);
687 kvaser_usb_reset_tx_urb_contexts(priv);
688
689 priv->can.state = CAN_STATE_STOPPED;
690 priv->can.clock.freq = dev->cfg->clock.freq;
691 priv->can.bittiming_const = dev->cfg->bittiming_const;
692 priv->can.do_set_bittiming = dev->ops->dev_set_bittiming;
693 priv->can.do_set_mode = dev->ops->dev_set_mode;
694 if ((id->driver_info & KVASER_USB_HAS_TXRX_ERRORS) ||
695 (priv->dev->card_data.capabilities & KVASER_USB_CAP_BERR_CAP))
696 priv->can.do_get_berr_counter = dev->ops->dev_get_berr_counter;
697 if (id->driver_info & KVASER_USB_HAS_SILENT_MODE)
698 priv->can.ctrlmode_supported |= CAN_CTRLMODE_LISTENONLY;
699
700 priv->can.ctrlmode_supported |= dev->card_data.ctrlmode_supported;
701
702 if (priv->can.ctrlmode_supported & CAN_CTRLMODE_FD) {
703 priv->can.data_bittiming_const = dev->cfg->data_bittiming_const;
704 priv->can.do_set_data_bittiming =
705 dev->ops->dev_set_data_bittiming;
706 }
707
708 netdev->flags |= IFF_ECHO;
709
710 netdev->netdev_ops = &kvaser_usb_netdev_ops;
711
712 SET_NETDEV_DEV(netdev, &dev->intf->dev);
713 netdev->dev_id = channel;
714
715 dev->nets[channel] = priv;
716
717 err = register_candev(netdev);
718 if (err) {
719 dev_err(&dev->intf->dev, "Failed to register CAN device\n");
720 free_candev(netdev);
721 dev->nets[channel] = NULL;
722 return err;
723 }
724
725 netdev_dbg(netdev, "device registered\n");
726
727 return 0;
728 }
729
kvaser_usb_probe(struct usb_interface * intf,const struct usb_device_id * id)730 static int kvaser_usb_probe(struct usb_interface *intf,
731 const struct usb_device_id *id)
732 {
733 struct kvaser_usb *dev;
734 int err;
735 int i;
736
737 dev = devm_kzalloc(&intf->dev, sizeof(*dev), GFP_KERNEL);
738 if (!dev)
739 return -ENOMEM;
740
741 if (kvaser_is_leaf(id)) {
742 dev->card_data.leaf.family = KVASER_LEAF;
743 dev->ops = &kvaser_usb_leaf_dev_ops;
744 } else if (kvaser_is_usbcan(id)) {
745 dev->card_data.leaf.family = KVASER_USBCAN;
746 dev->ops = &kvaser_usb_leaf_dev_ops;
747 } else if (kvaser_is_hydra(id)) {
748 dev->ops = &kvaser_usb_hydra_dev_ops;
749 } else {
750 dev_err(&intf->dev,
751 "Product ID (%d) is not a supported Kvaser USB device\n",
752 id->idProduct);
753 return -ENODEV;
754 }
755
756 dev->intf = intf;
757
758 err = dev->ops->dev_setup_endpoints(dev);
759 if (err) {
760 dev_err(&intf->dev, "Cannot get usb endpoint(s)");
761 return err;
762 }
763
764 dev->udev = interface_to_usbdev(intf);
765
766 init_usb_anchor(&dev->rx_submitted);
767
768 usb_set_intfdata(intf, dev);
769
770 dev->card_data.ctrlmode_supported = 0;
771 dev->card_data.capabilities = 0;
772 err = dev->ops->dev_init_card(dev);
773 if (err) {
774 dev_err(&intf->dev,
775 "Failed to initialize card, error %d\n", err);
776 return err;
777 }
778
779 err = dev->ops->dev_get_software_info(dev);
780 if (err) {
781 dev_err(&intf->dev,
782 "Cannot get software info, error %d\n", err);
783 return err;
784 }
785
786 if (dev->ops->dev_get_software_details) {
787 err = dev->ops->dev_get_software_details(dev);
788 if (err) {
789 dev_err(&intf->dev,
790 "Cannot get software details, error %d\n", err);
791 return err;
792 }
793 }
794
795 if (WARN_ON(!dev->cfg))
796 return -ENODEV;
797
798 dev_dbg(&intf->dev, "Firmware version: %d.%d.%d\n",
799 ((dev->fw_version >> 24) & 0xff),
800 ((dev->fw_version >> 16) & 0xff),
801 (dev->fw_version & 0xffff));
802
803 dev_dbg(&intf->dev, "Max outstanding tx = %d URBs\n", dev->max_tx_urbs);
804
805 err = dev->ops->dev_get_card_info(dev);
806 if (err) {
807 dev_err(&intf->dev, "Cannot get card info, error %d\n", err);
808 return err;
809 }
810
811 if (dev->ops->dev_get_capabilities) {
812 err = dev->ops->dev_get_capabilities(dev);
813 if (err) {
814 dev_err(&intf->dev,
815 "Cannot get capabilities, error %d\n", err);
816 kvaser_usb_remove_interfaces(dev);
817 return err;
818 }
819 }
820
821 for (i = 0; i < dev->nchannels; i++) {
822 err = kvaser_usb_init_one(dev, id, i);
823 if (err) {
824 kvaser_usb_remove_interfaces(dev);
825 return err;
826 }
827 }
828
829 return 0;
830 }
831
kvaser_usb_disconnect(struct usb_interface * intf)832 static void kvaser_usb_disconnect(struct usb_interface *intf)
833 {
834 struct kvaser_usb *dev = usb_get_intfdata(intf);
835
836 usb_set_intfdata(intf, NULL);
837
838 if (!dev)
839 return;
840
841 kvaser_usb_remove_interfaces(dev);
842 }
843
844 static struct usb_driver kvaser_usb_driver = {
845 .name = "kvaser_usb",
846 .probe = kvaser_usb_probe,
847 .disconnect = kvaser_usb_disconnect,
848 .id_table = kvaser_usb_table,
849 };
850
851 module_usb_driver(kvaser_usb_driver);
852
853 MODULE_AUTHOR("Olivier Sobrie <olivier@sobrie.be>");
854 MODULE_AUTHOR("Kvaser AB <support@kvaser.com>");
855 MODULE_DESCRIPTION("CAN driver for Kvaser CAN/USB devices");
856 MODULE_LICENSE("GPL v2");
857