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/ethtool.h>
17 #include <linux/gfp.h>
18 #include <linux/if.h>
19 #include <linux/kernel.h>
20 #include <linux/module.h>
21 #include <linux/netdevice.h>
22 #include <linux/spinlock.h>
23 #include <linux/types.h>
24 #include <linux/usb.h>
25
26 #include <linux/can.h>
27 #include <linux/can/dev.h>
28 #include <linux/can/error.h>
29 #include <linux/can/netlink.h>
30
31 #include "kvaser_usb.h"
32
33 /* Kvaser USB vendor id. */
34 #define KVASER_VENDOR_ID 0x0bfd
35
36 /* Kvaser Leaf USB devices product ids */
37 #define USB_LEAF_DEVEL_PRODUCT_ID 10
38 #define USB_LEAF_LITE_PRODUCT_ID 11
39 #define USB_LEAF_PRO_PRODUCT_ID 12
40 #define USB_LEAF_SPRO_PRODUCT_ID 14
41 #define USB_LEAF_PRO_LS_PRODUCT_ID 15
42 #define USB_LEAF_PRO_SWC_PRODUCT_ID 16
43 #define USB_LEAF_PRO_LIN_PRODUCT_ID 17
44 #define USB_LEAF_SPRO_LS_PRODUCT_ID 18
45 #define USB_LEAF_SPRO_SWC_PRODUCT_ID 19
46 #define USB_MEMO2_DEVEL_PRODUCT_ID 22
47 #define USB_MEMO2_HSHS_PRODUCT_ID 23
48 #define USB_UPRO_HSHS_PRODUCT_ID 24
49 #define USB_LEAF_LITE_GI_PRODUCT_ID 25
50 #define USB_LEAF_PRO_OBDII_PRODUCT_ID 26
51 #define USB_MEMO2_HSLS_PRODUCT_ID 27
52 #define USB_LEAF_LITE_CH_PRODUCT_ID 28
53 #define USB_BLACKBIRD_SPRO_PRODUCT_ID 29
54 #define USB_OEM_MERCURY_PRODUCT_ID 34
55 #define USB_OEM_LEAF_PRODUCT_ID 35
56 #define USB_CAN_R_PRODUCT_ID 39
57 #define USB_LEAF_LITE_V2_PRODUCT_ID 288
58 #define USB_MINI_PCIE_HS_PRODUCT_ID 289
59 #define USB_LEAF_LIGHT_HS_V2_OEM_PRODUCT_ID 290
60 #define USB_USBCAN_LIGHT_2HS_PRODUCT_ID 291
61 #define USB_MINI_PCIE_2HS_PRODUCT_ID 292
62 #define USB_USBCAN_R_V2_PRODUCT_ID 294
63 #define USB_LEAF_LIGHT_R_V2_PRODUCT_ID 295
64 #define USB_LEAF_LIGHT_HS_V2_OEM2_PRODUCT_ID 296
65
66 /* Kvaser USBCan-II devices product ids */
67 #define USB_USBCAN_REVB_PRODUCT_ID 2
68 #define USB_VCI2_PRODUCT_ID 3
69 #define USB_USBCAN2_PRODUCT_ID 4
70 #define USB_MEMORATOR_PRODUCT_ID 5
71
72 /* Kvaser Minihydra USB devices product ids */
73 #define USB_BLACKBIRD_V2_PRODUCT_ID 258
74 #define USB_MEMO_PRO_5HS_PRODUCT_ID 260
75 #define USB_USBCAN_PRO_5HS_PRODUCT_ID 261
76 #define USB_USBCAN_LIGHT_4HS_PRODUCT_ID 262
77 #define USB_LEAF_PRO_HS_V2_PRODUCT_ID 263
78 #define USB_USBCAN_PRO_2HS_V2_PRODUCT_ID 264
79 #define USB_MEMO_2HS_PRODUCT_ID 265
80 #define USB_MEMO_PRO_2HS_V2_PRODUCT_ID 266
81 #define USB_HYBRID_2CANLIN_PRODUCT_ID 267
82 #define USB_ATI_USBCAN_PRO_2HS_V2_PRODUCT_ID 268
83 #define USB_ATI_MEMO_PRO_2HS_V2_PRODUCT_ID 269
84 #define USB_HYBRID_PRO_2CANLIN_PRODUCT_ID 270
85 #define USB_U100_PRODUCT_ID 273
86 #define USB_U100P_PRODUCT_ID 274
87 #define USB_U100S_PRODUCT_ID 275
88 #define USB_USBCAN_PRO_4HS_PRODUCT_ID 276
89 #define USB_HYBRID_CANLIN_PRODUCT_ID 277
90 #define USB_HYBRID_PRO_CANLIN_PRODUCT_ID 278
91
92 static const struct kvaser_usb_driver_info kvaser_usb_driver_info_hydra = {
93 .quirks = KVASER_USB_QUIRK_HAS_HARDWARE_TIMESTAMP,
94 .ops = &kvaser_usb_hydra_dev_ops,
95 };
96
97 static const struct kvaser_usb_driver_info kvaser_usb_driver_info_usbcan = {
98 .quirks = KVASER_USB_QUIRK_HAS_TXRX_ERRORS |
99 KVASER_USB_QUIRK_HAS_SILENT_MODE,
100 .family = KVASER_USBCAN,
101 .ops = &kvaser_usb_leaf_dev_ops,
102 };
103
104 static const struct kvaser_usb_driver_info kvaser_usb_driver_info_leaf = {
105 .quirks = KVASER_USB_QUIRK_IGNORE_CLK_FREQ,
106 .family = KVASER_LEAF,
107 .ops = &kvaser_usb_leaf_dev_ops,
108 };
109
110 static const struct kvaser_usb_driver_info kvaser_usb_driver_info_leaf_err = {
111 .quirks = KVASER_USB_QUIRK_HAS_TXRX_ERRORS |
112 KVASER_USB_QUIRK_IGNORE_CLK_FREQ,
113 .family = KVASER_LEAF,
114 .ops = &kvaser_usb_leaf_dev_ops,
115 };
116
117 static const struct kvaser_usb_driver_info kvaser_usb_driver_info_leaf_err_listen = {
118 .quirks = KVASER_USB_QUIRK_HAS_TXRX_ERRORS |
119 KVASER_USB_QUIRK_HAS_SILENT_MODE |
120 KVASER_USB_QUIRK_IGNORE_CLK_FREQ,
121 .family = KVASER_LEAF,
122 .ops = &kvaser_usb_leaf_dev_ops,
123 };
124
125 static const struct kvaser_usb_driver_info kvaser_usb_driver_info_leafimx = {
126 .quirks = 0,
127 .ops = &kvaser_usb_leaf_dev_ops,
128 };
129
130 static const struct usb_device_id kvaser_usb_table[] = {
131 /* Leaf M32C USB product IDs */
132 { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_DEVEL_PRODUCT_ID),
133 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_leaf },
134 { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_LITE_PRODUCT_ID),
135 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_leaf },
136 { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_PRO_PRODUCT_ID),
137 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_leaf_err_listen },
138 { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_SPRO_PRODUCT_ID),
139 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_leaf_err_listen },
140 { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_PRO_LS_PRODUCT_ID),
141 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_leaf_err_listen },
142 { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_PRO_SWC_PRODUCT_ID),
143 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_leaf_err_listen },
144 { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_PRO_LIN_PRODUCT_ID),
145 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_leaf_err_listen },
146 { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_SPRO_LS_PRODUCT_ID),
147 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_leaf_err_listen },
148 { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_SPRO_SWC_PRODUCT_ID),
149 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_leaf_err_listen },
150 { USB_DEVICE(KVASER_VENDOR_ID, USB_MEMO2_DEVEL_PRODUCT_ID),
151 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_leaf_err_listen },
152 { USB_DEVICE(KVASER_VENDOR_ID, USB_MEMO2_HSHS_PRODUCT_ID),
153 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_leaf_err_listen },
154 { USB_DEVICE(KVASER_VENDOR_ID, USB_UPRO_HSHS_PRODUCT_ID),
155 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_leaf_err },
156 { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_LITE_GI_PRODUCT_ID),
157 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_leaf },
158 { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_PRO_OBDII_PRODUCT_ID),
159 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_leaf_err_listen },
160 { USB_DEVICE(KVASER_VENDOR_ID, USB_MEMO2_HSLS_PRODUCT_ID),
161 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_leaf_err },
162 { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_LITE_CH_PRODUCT_ID),
163 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_leaf_err },
164 { USB_DEVICE(KVASER_VENDOR_ID, USB_BLACKBIRD_SPRO_PRODUCT_ID),
165 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_leaf_err },
166 { USB_DEVICE(KVASER_VENDOR_ID, USB_OEM_MERCURY_PRODUCT_ID),
167 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_leaf_err },
168 { USB_DEVICE(KVASER_VENDOR_ID, USB_OEM_LEAF_PRODUCT_ID),
169 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_leaf_err },
170 { USB_DEVICE(KVASER_VENDOR_ID, USB_CAN_R_PRODUCT_ID),
171 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_leaf_err },
172
173 /* Leaf i.MX28 USB product IDs */
174 { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_LITE_V2_PRODUCT_ID),
175 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_leafimx },
176 { USB_DEVICE(KVASER_VENDOR_ID, USB_MINI_PCIE_HS_PRODUCT_ID),
177 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_leafimx },
178 { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_LIGHT_HS_V2_OEM_PRODUCT_ID),
179 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_leafimx },
180 { USB_DEVICE(KVASER_VENDOR_ID, USB_USBCAN_LIGHT_2HS_PRODUCT_ID),
181 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_leafimx },
182 { USB_DEVICE(KVASER_VENDOR_ID, USB_MINI_PCIE_2HS_PRODUCT_ID),
183 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_leafimx },
184 { USB_DEVICE(KVASER_VENDOR_ID, USB_USBCAN_R_V2_PRODUCT_ID),
185 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_leafimx },
186 { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_LIGHT_R_V2_PRODUCT_ID),
187 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_leafimx },
188 { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_LIGHT_HS_V2_OEM2_PRODUCT_ID),
189 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_leafimx },
190
191 /* USBCANII USB product IDs */
192 { USB_DEVICE(KVASER_VENDOR_ID, USB_USBCAN2_PRODUCT_ID),
193 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_usbcan },
194 { USB_DEVICE(KVASER_VENDOR_ID, USB_USBCAN_REVB_PRODUCT_ID),
195 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_usbcan },
196 { USB_DEVICE(KVASER_VENDOR_ID, USB_MEMORATOR_PRODUCT_ID),
197 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_usbcan },
198 { USB_DEVICE(KVASER_VENDOR_ID, USB_VCI2_PRODUCT_ID),
199 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_usbcan },
200
201 /* Minihydra USB product IDs */
202 { USB_DEVICE(KVASER_VENDOR_ID, USB_BLACKBIRD_V2_PRODUCT_ID),
203 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_hydra },
204 { USB_DEVICE(KVASER_VENDOR_ID, USB_MEMO_PRO_5HS_PRODUCT_ID),
205 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_hydra },
206 { USB_DEVICE(KVASER_VENDOR_ID, USB_USBCAN_PRO_5HS_PRODUCT_ID),
207 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_hydra },
208 { USB_DEVICE(KVASER_VENDOR_ID, USB_USBCAN_LIGHT_4HS_PRODUCT_ID),
209 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_hydra },
210 { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_PRO_HS_V2_PRODUCT_ID),
211 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_hydra },
212 { USB_DEVICE(KVASER_VENDOR_ID, USB_USBCAN_PRO_2HS_V2_PRODUCT_ID),
213 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_hydra },
214 { USB_DEVICE(KVASER_VENDOR_ID, USB_MEMO_2HS_PRODUCT_ID),
215 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_hydra },
216 { USB_DEVICE(KVASER_VENDOR_ID, USB_MEMO_PRO_2HS_V2_PRODUCT_ID),
217 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_hydra },
218 { USB_DEVICE(KVASER_VENDOR_ID, USB_HYBRID_2CANLIN_PRODUCT_ID),
219 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_hydra },
220 { USB_DEVICE(KVASER_VENDOR_ID, USB_ATI_USBCAN_PRO_2HS_V2_PRODUCT_ID),
221 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_hydra },
222 { USB_DEVICE(KVASER_VENDOR_ID, USB_ATI_MEMO_PRO_2HS_V2_PRODUCT_ID),
223 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_hydra },
224 { USB_DEVICE(KVASER_VENDOR_ID, USB_HYBRID_PRO_2CANLIN_PRODUCT_ID),
225 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_hydra },
226 { USB_DEVICE(KVASER_VENDOR_ID, USB_U100_PRODUCT_ID),
227 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_hydra },
228 { USB_DEVICE(KVASER_VENDOR_ID, USB_U100P_PRODUCT_ID),
229 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_hydra },
230 { USB_DEVICE(KVASER_VENDOR_ID, USB_U100S_PRODUCT_ID),
231 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_hydra },
232 { USB_DEVICE(KVASER_VENDOR_ID, USB_USBCAN_PRO_4HS_PRODUCT_ID),
233 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_hydra },
234 { USB_DEVICE(KVASER_VENDOR_ID, USB_HYBRID_CANLIN_PRODUCT_ID),
235 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_hydra },
236 { USB_DEVICE(KVASER_VENDOR_ID, USB_HYBRID_PRO_CANLIN_PRODUCT_ID),
237 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_hydra },
238 { }
239 };
240 MODULE_DEVICE_TABLE(usb, kvaser_usb_table);
241
kvaser_usb_send_cmd(const struct kvaser_usb * dev,void * cmd,int len)242 int kvaser_usb_send_cmd(const struct kvaser_usb *dev, void *cmd, int len)
243 {
244 return usb_bulk_msg(dev->udev,
245 usb_sndbulkpipe(dev->udev,
246 dev->bulk_out->bEndpointAddress),
247 cmd, len, NULL, KVASER_USB_TIMEOUT);
248 }
249
kvaser_usb_recv_cmd(const struct kvaser_usb * dev,void * cmd,int len,int * actual_len)250 int kvaser_usb_recv_cmd(const struct kvaser_usb *dev, void *cmd, int len,
251 int *actual_len)
252 {
253 return usb_bulk_msg(dev->udev,
254 usb_rcvbulkpipe(dev->udev,
255 dev->bulk_in->bEndpointAddress),
256 cmd, len, actual_len, KVASER_USB_TIMEOUT);
257 }
258
kvaser_usb_send_cmd_callback(struct urb * urb)259 static void kvaser_usb_send_cmd_callback(struct urb *urb)
260 {
261 struct net_device *netdev = urb->context;
262
263 kfree(urb->transfer_buffer);
264
265 if (urb->status)
266 netdev_warn(netdev, "urb status received: %d\n", urb->status);
267 }
268
kvaser_usb_send_cmd_async(struct kvaser_usb_net_priv * priv,void * cmd,int len)269 int kvaser_usb_send_cmd_async(struct kvaser_usb_net_priv *priv, void *cmd,
270 int len)
271 {
272 struct kvaser_usb *dev = priv->dev;
273 struct net_device *netdev = priv->netdev;
274 struct urb *urb;
275 int err;
276
277 urb = usb_alloc_urb(0, GFP_ATOMIC);
278 if (!urb)
279 return -ENOMEM;
280
281 usb_fill_bulk_urb(urb, dev->udev,
282 usb_sndbulkpipe(dev->udev,
283 dev->bulk_out->bEndpointAddress),
284 cmd, len, kvaser_usb_send_cmd_callback, netdev);
285 usb_anchor_urb(urb, &priv->tx_submitted);
286
287 err = usb_submit_urb(urb, GFP_ATOMIC);
288 if (err) {
289 netdev_err(netdev, "Error transmitting URB\n");
290 usb_unanchor_urb(urb);
291 }
292 usb_free_urb(urb);
293
294 return 0;
295 }
296
kvaser_usb_can_rx_over_error(struct net_device * netdev)297 int kvaser_usb_can_rx_over_error(struct net_device *netdev)
298 {
299 struct net_device_stats *stats = &netdev->stats;
300 struct can_frame *cf;
301 struct sk_buff *skb;
302
303 stats->rx_over_errors++;
304 stats->rx_errors++;
305
306 skb = alloc_can_err_skb(netdev, &cf);
307 if (!skb) {
308 stats->rx_dropped++;
309 netdev_warn(netdev, "No memory left for err_skb\n");
310 return -ENOMEM;
311 }
312
313 cf->can_id |= CAN_ERR_CRTL;
314 cf->data[1] = CAN_ERR_CRTL_RX_OVERFLOW;
315
316 netif_rx(skb);
317
318 return 0;
319 }
320
kvaser_usb_read_bulk_callback(struct urb * urb)321 static void kvaser_usb_read_bulk_callback(struct urb *urb)
322 {
323 struct kvaser_usb *dev = urb->context;
324 const struct kvaser_usb_dev_ops *ops = dev->driver_info->ops;
325 int err;
326 unsigned int i;
327
328 switch (urb->status) {
329 case 0:
330 break;
331 case -ENOENT:
332 case -EPIPE:
333 case -EPROTO:
334 case -ESHUTDOWN:
335 return;
336 default:
337 dev_info(&dev->intf->dev, "Rx URB aborted (%d)\n", urb->status);
338 goto resubmit_urb;
339 }
340
341 ops->dev_read_bulk_callback(dev, urb->transfer_buffer,
342 urb->actual_length);
343
344 resubmit_urb:
345 usb_fill_bulk_urb(urb, dev->udev,
346 usb_rcvbulkpipe(dev->udev,
347 dev->bulk_in->bEndpointAddress),
348 urb->transfer_buffer, KVASER_USB_RX_BUFFER_SIZE,
349 kvaser_usb_read_bulk_callback, dev);
350
351 err = usb_submit_urb(urb, GFP_ATOMIC);
352 if (err == -ENODEV) {
353 for (i = 0; i < dev->nchannels; i++) {
354 if (!dev->nets[i])
355 continue;
356
357 netif_device_detach(dev->nets[i]->netdev);
358 }
359 } else if (err) {
360 dev_err(&dev->intf->dev,
361 "Failed resubmitting read bulk urb: %d\n", err);
362 }
363 }
364
kvaser_usb_setup_rx_urbs(struct kvaser_usb * dev)365 static int kvaser_usb_setup_rx_urbs(struct kvaser_usb *dev)
366 {
367 int i, err = 0;
368
369 if (dev->rxinitdone)
370 return 0;
371
372 for (i = 0; i < KVASER_USB_MAX_RX_URBS; i++) {
373 struct urb *urb = NULL;
374 u8 *buf = NULL;
375 dma_addr_t buf_dma;
376
377 urb = usb_alloc_urb(0, GFP_KERNEL);
378 if (!urb) {
379 err = -ENOMEM;
380 break;
381 }
382
383 buf = usb_alloc_coherent(dev->udev, KVASER_USB_RX_BUFFER_SIZE,
384 GFP_KERNEL, &buf_dma);
385 if (!buf) {
386 dev_warn(&dev->intf->dev,
387 "No memory left for USB buffer\n");
388 usb_free_urb(urb);
389 err = -ENOMEM;
390 break;
391 }
392
393 usb_fill_bulk_urb(urb, dev->udev,
394 usb_rcvbulkpipe
395 (dev->udev,
396 dev->bulk_in->bEndpointAddress),
397 buf, KVASER_USB_RX_BUFFER_SIZE,
398 kvaser_usb_read_bulk_callback, dev);
399 urb->transfer_dma = buf_dma;
400 urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
401 usb_anchor_urb(urb, &dev->rx_submitted);
402
403 err = usb_submit_urb(urb, GFP_KERNEL);
404 if (err) {
405 usb_unanchor_urb(urb);
406 usb_free_coherent(dev->udev,
407 KVASER_USB_RX_BUFFER_SIZE, buf,
408 buf_dma);
409 usb_free_urb(urb);
410 break;
411 }
412
413 dev->rxbuf[i] = buf;
414 dev->rxbuf_dma[i] = buf_dma;
415
416 usb_free_urb(urb);
417 }
418
419 if (i == 0) {
420 dev_warn(&dev->intf->dev, "Cannot setup read URBs, error %d\n",
421 err);
422 return err;
423 } else if (i < KVASER_USB_MAX_RX_URBS) {
424 dev_warn(&dev->intf->dev, "RX performances may be slow\n");
425 }
426
427 dev->rxinitdone = true;
428
429 return 0;
430 }
431
kvaser_usb_open(struct net_device * netdev)432 static int kvaser_usb_open(struct net_device *netdev)
433 {
434 struct kvaser_usb_net_priv *priv = netdev_priv(netdev);
435 struct kvaser_usb *dev = priv->dev;
436 const struct kvaser_usb_dev_ops *ops = dev->driver_info->ops;
437 int err;
438
439 err = open_candev(netdev);
440 if (err)
441 return err;
442
443 err = kvaser_usb_setup_rx_urbs(dev);
444 if (err)
445 goto error;
446
447 err = ops->dev_set_opt_mode(priv);
448 if (err)
449 goto error;
450
451 err = ops->dev_start_chip(priv);
452 if (err) {
453 netdev_warn(netdev, "Cannot start device, error %d\n", err);
454 goto error;
455 }
456
457 priv->can.state = CAN_STATE_ERROR_ACTIVE;
458
459 return 0;
460
461 error:
462 close_candev(netdev);
463 return err;
464 }
465
kvaser_usb_reset_tx_urb_contexts(struct kvaser_usb_net_priv * priv)466 static void kvaser_usb_reset_tx_urb_contexts(struct kvaser_usb_net_priv *priv)
467 {
468 int i, max_tx_urbs;
469
470 max_tx_urbs = priv->dev->max_tx_urbs;
471
472 priv->active_tx_contexts = 0;
473 for (i = 0; i < max_tx_urbs; i++)
474 priv->tx_contexts[i].echo_index = max_tx_urbs;
475 }
476
477 /* This method might sleep. Do not call it in the atomic context
478 * of URB completions.
479 */
kvaser_usb_unlink_tx_urbs(struct kvaser_usb_net_priv * priv)480 void kvaser_usb_unlink_tx_urbs(struct kvaser_usb_net_priv *priv)
481 {
482 usb_kill_anchored_urbs(&priv->tx_submitted);
483 kvaser_usb_reset_tx_urb_contexts(priv);
484 }
485
kvaser_usb_unlink_all_urbs(struct kvaser_usb * dev)486 static void kvaser_usb_unlink_all_urbs(struct kvaser_usb *dev)
487 {
488 int i;
489
490 usb_kill_anchored_urbs(&dev->rx_submitted);
491
492 for (i = 0; i < KVASER_USB_MAX_RX_URBS; i++)
493 usb_free_coherent(dev->udev, KVASER_USB_RX_BUFFER_SIZE,
494 dev->rxbuf[i], dev->rxbuf_dma[i]);
495
496 for (i = 0; i < dev->nchannels; i++) {
497 struct kvaser_usb_net_priv *priv = dev->nets[i];
498
499 if (priv)
500 kvaser_usb_unlink_tx_urbs(priv);
501 }
502 }
503
kvaser_usb_close(struct net_device * netdev)504 static int kvaser_usb_close(struct net_device *netdev)
505 {
506 struct kvaser_usb_net_priv *priv = netdev_priv(netdev);
507 struct kvaser_usb *dev = priv->dev;
508 const struct kvaser_usb_dev_ops *ops = dev->driver_info->ops;
509 int err;
510
511 netif_stop_queue(netdev);
512
513 err = ops->dev_flush_queue(priv);
514 if (err)
515 netdev_warn(netdev, "Cannot flush queue, error %d\n", err);
516
517 if (ops->dev_reset_chip) {
518 err = ops->dev_reset_chip(dev, priv->channel);
519 if (err)
520 netdev_warn(netdev, "Cannot reset card, error %d\n",
521 err);
522 }
523
524 err = ops->dev_stop_chip(priv);
525 if (err)
526 netdev_warn(netdev, "Cannot stop device, error %d\n", err);
527
528 /* reset tx contexts */
529 kvaser_usb_unlink_tx_urbs(priv);
530
531 priv->can.state = CAN_STATE_STOPPED;
532 close_candev(priv->netdev);
533
534 return 0;
535 }
536
kvaser_usb_write_bulk_callback(struct urb * urb)537 static void kvaser_usb_write_bulk_callback(struct urb *urb)
538 {
539 struct kvaser_usb_tx_urb_context *context = urb->context;
540 struct kvaser_usb_net_priv *priv;
541 struct net_device *netdev;
542
543 if (WARN_ON(!context))
544 return;
545
546 priv = context->priv;
547 netdev = priv->netdev;
548
549 kfree(urb->transfer_buffer);
550
551 if (!netif_device_present(netdev))
552 return;
553
554 if (urb->status)
555 netdev_info(netdev, "Tx URB aborted (%d)\n", urb->status);
556 }
557
kvaser_usb_start_xmit(struct sk_buff * skb,struct net_device * netdev)558 static netdev_tx_t kvaser_usb_start_xmit(struct sk_buff *skb,
559 struct net_device *netdev)
560 {
561 struct kvaser_usb_net_priv *priv = netdev_priv(netdev);
562 struct kvaser_usb *dev = priv->dev;
563 const struct kvaser_usb_dev_ops *ops = dev->driver_info->ops;
564 struct net_device_stats *stats = &netdev->stats;
565 struct kvaser_usb_tx_urb_context *context = NULL;
566 struct urb *urb;
567 void *buf;
568 int cmd_len = 0;
569 int err, ret = NETDEV_TX_OK;
570 unsigned int i;
571 unsigned long flags;
572
573 if (can_dev_dropped_skb(netdev, skb))
574 return NETDEV_TX_OK;
575
576 urb = usb_alloc_urb(0, GFP_ATOMIC);
577 if (!urb) {
578 stats->tx_dropped++;
579 dev_kfree_skb(skb);
580 return NETDEV_TX_OK;
581 }
582
583 spin_lock_irqsave(&priv->tx_contexts_lock, flags);
584 for (i = 0; i < dev->max_tx_urbs; i++) {
585 if (priv->tx_contexts[i].echo_index == dev->max_tx_urbs) {
586 context = &priv->tx_contexts[i];
587
588 context->echo_index = i;
589 ++priv->active_tx_contexts;
590 if (priv->active_tx_contexts >= (int)dev->max_tx_urbs)
591 netif_stop_queue(netdev);
592
593 break;
594 }
595 }
596 spin_unlock_irqrestore(&priv->tx_contexts_lock, flags);
597
598 /* This should never happen; it implies a flow control bug */
599 if (!context) {
600 netdev_warn(netdev, "cannot find free context\n");
601
602 ret = NETDEV_TX_BUSY;
603 goto freeurb;
604 }
605
606 buf = ops->dev_frame_to_cmd(priv, skb, &cmd_len, context->echo_index);
607 if (!buf) {
608 stats->tx_dropped++;
609 dev_kfree_skb(skb);
610 spin_lock_irqsave(&priv->tx_contexts_lock, flags);
611
612 context->echo_index = dev->max_tx_urbs;
613 --priv->active_tx_contexts;
614 netif_wake_queue(netdev);
615
616 spin_unlock_irqrestore(&priv->tx_contexts_lock, flags);
617 goto freeurb;
618 }
619
620 context->priv = priv;
621
622 can_put_echo_skb(skb, netdev, context->echo_index, 0);
623
624 usb_fill_bulk_urb(urb, dev->udev,
625 usb_sndbulkpipe(dev->udev,
626 dev->bulk_out->bEndpointAddress),
627 buf, cmd_len, kvaser_usb_write_bulk_callback,
628 context);
629 usb_anchor_urb(urb, &priv->tx_submitted);
630
631 err = usb_submit_urb(urb, GFP_ATOMIC);
632 if (unlikely(err)) {
633 spin_lock_irqsave(&priv->tx_contexts_lock, flags);
634
635 can_free_echo_skb(netdev, context->echo_index, NULL);
636 context->echo_index = dev->max_tx_urbs;
637 --priv->active_tx_contexts;
638 netif_wake_queue(netdev);
639
640 spin_unlock_irqrestore(&priv->tx_contexts_lock, flags);
641
642 usb_unanchor_urb(urb);
643 kfree(buf);
644
645 stats->tx_dropped++;
646
647 if (err == -ENODEV)
648 netif_device_detach(netdev);
649 else
650 netdev_warn(netdev, "Failed tx_urb %d\n", err);
651
652 goto freeurb;
653 }
654
655 ret = NETDEV_TX_OK;
656
657 freeurb:
658 usb_free_urb(urb);
659 return ret;
660 }
661
662 static const struct net_device_ops kvaser_usb_netdev_ops = {
663 .ndo_open = kvaser_usb_open,
664 .ndo_stop = kvaser_usb_close,
665 .ndo_start_xmit = kvaser_usb_start_xmit,
666 .ndo_change_mtu = can_change_mtu,
667 };
668
669 static const struct net_device_ops kvaser_usb_netdev_ops_hwts = {
670 .ndo_open = kvaser_usb_open,
671 .ndo_stop = kvaser_usb_close,
672 .ndo_eth_ioctl = can_eth_ioctl_hwts,
673 .ndo_start_xmit = kvaser_usb_start_xmit,
674 .ndo_change_mtu = can_change_mtu,
675 };
676
677 static const struct ethtool_ops kvaser_usb_ethtool_ops = {
678 .get_ts_info = ethtool_op_get_ts_info,
679 };
680
681 static const struct ethtool_ops kvaser_usb_ethtool_ops_hwts = {
682 .get_ts_info = can_ethtool_op_get_ts_info_hwts,
683 };
684
kvaser_usb_remove_interfaces(struct kvaser_usb * dev)685 static void kvaser_usb_remove_interfaces(struct kvaser_usb *dev)
686 {
687 int i;
688
689 for (i = 0; i < dev->nchannels; i++) {
690 if (!dev->nets[i])
691 continue;
692
693 unregister_candev(dev->nets[i]->netdev);
694 }
695
696 kvaser_usb_unlink_all_urbs(dev);
697
698 for (i = 0; i < dev->nchannels; i++) {
699 if (!dev->nets[i])
700 continue;
701
702 free_candev(dev->nets[i]->netdev);
703 }
704 }
705
kvaser_usb_init_one(struct kvaser_usb * dev,int channel)706 static int kvaser_usb_init_one(struct kvaser_usb *dev, int channel)
707 {
708 struct net_device *netdev;
709 struct kvaser_usb_net_priv *priv;
710 const struct kvaser_usb_driver_info *driver_info = dev->driver_info;
711 const struct kvaser_usb_dev_ops *ops = driver_info->ops;
712 int err;
713
714 if (ops->dev_reset_chip) {
715 err = ops->dev_reset_chip(dev, channel);
716 if (err)
717 return err;
718 }
719
720 netdev = alloc_candev(struct_size(priv, tx_contexts, dev->max_tx_urbs),
721 dev->max_tx_urbs);
722 if (!netdev) {
723 dev_err(&dev->intf->dev, "Cannot alloc candev\n");
724 return -ENOMEM;
725 }
726
727 priv = netdev_priv(netdev);
728
729 init_usb_anchor(&priv->tx_submitted);
730 init_completion(&priv->start_comp);
731 init_completion(&priv->stop_comp);
732 init_completion(&priv->flush_comp);
733 priv->can.ctrlmode_supported = 0;
734
735 priv->dev = dev;
736 priv->netdev = netdev;
737 priv->channel = channel;
738
739 spin_lock_init(&priv->tx_contexts_lock);
740 kvaser_usb_reset_tx_urb_contexts(priv);
741
742 priv->can.state = CAN_STATE_STOPPED;
743 priv->can.clock.freq = dev->cfg->clock.freq;
744 priv->can.bittiming_const = dev->cfg->bittiming_const;
745 priv->can.do_set_bittiming = ops->dev_set_bittiming;
746 priv->can.do_set_mode = ops->dev_set_mode;
747 if ((driver_info->quirks & KVASER_USB_QUIRK_HAS_TXRX_ERRORS) ||
748 (priv->dev->card_data.capabilities & KVASER_USB_CAP_BERR_CAP))
749 priv->can.do_get_berr_counter = ops->dev_get_berr_counter;
750 if (driver_info->quirks & KVASER_USB_QUIRK_HAS_SILENT_MODE)
751 priv->can.ctrlmode_supported |= CAN_CTRLMODE_LISTENONLY;
752
753 priv->can.ctrlmode_supported |= dev->card_data.ctrlmode_supported;
754
755 if (priv->can.ctrlmode_supported & CAN_CTRLMODE_FD) {
756 priv->can.data_bittiming_const = dev->cfg->data_bittiming_const;
757 priv->can.do_set_data_bittiming = ops->dev_set_data_bittiming;
758 }
759
760 netdev->flags |= IFF_ECHO;
761
762 netdev->netdev_ops = &kvaser_usb_netdev_ops;
763 if (driver_info->quirks & KVASER_USB_QUIRK_HAS_HARDWARE_TIMESTAMP) {
764 netdev->netdev_ops = &kvaser_usb_netdev_ops_hwts;
765 netdev->ethtool_ops = &kvaser_usb_ethtool_ops_hwts;
766 } else {
767 netdev->netdev_ops = &kvaser_usb_netdev_ops;
768 netdev->ethtool_ops = &kvaser_usb_ethtool_ops;
769 }
770 SET_NETDEV_DEV(netdev, &dev->intf->dev);
771 netdev->dev_id = channel;
772
773 dev->nets[channel] = priv;
774
775 err = register_candev(netdev);
776 if (err) {
777 dev_err(&dev->intf->dev, "Failed to register CAN device\n");
778 free_candev(netdev);
779 dev->nets[channel] = NULL;
780 return err;
781 }
782
783 netdev_dbg(netdev, "device registered\n");
784
785 return 0;
786 }
787
kvaser_usb_probe(struct usb_interface * intf,const struct usb_device_id * id)788 static int kvaser_usb_probe(struct usb_interface *intf,
789 const struct usb_device_id *id)
790 {
791 struct kvaser_usb *dev;
792 int err;
793 int i;
794 const struct kvaser_usb_driver_info *driver_info;
795 const struct kvaser_usb_dev_ops *ops;
796
797 driver_info = (const struct kvaser_usb_driver_info *)id->driver_info;
798 if (!driver_info)
799 return -ENODEV;
800
801 dev = devm_kzalloc(&intf->dev, sizeof(*dev), GFP_KERNEL);
802 if (!dev)
803 return -ENOMEM;
804
805 dev->intf = intf;
806 dev->driver_info = driver_info;
807 ops = driver_info->ops;
808
809 err = ops->dev_setup_endpoints(dev);
810 if (err) {
811 dev_err(&intf->dev, "Cannot get usb endpoint(s)");
812 return err;
813 }
814
815 dev->udev = interface_to_usbdev(intf);
816
817 init_usb_anchor(&dev->rx_submitted);
818
819 usb_set_intfdata(intf, dev);
820
821 dev->card_data.ctrlmode_supported = 0;
822 dev->card_data.capabilities = 0;
823 err = ops->dev_init_card(dev);
824 if (err) {
825 dev_err(&intf->dev,
826 "Failed to initialize card, error %d\n", err);
827 return err;
828 }
829
830 err = ops->dev_get_software_info(dev);
831 if (err) {
832 dev_err(&intf->dev,
833 "Cannot get software info, error %d\n", err);
834 return err;
835 }
836
837 if (ops->dev_get_software_details) {
838 err = ops->dev_get_software_details(dev);
839 if (err) {
840 dev_err(&intf->dev,
841 "Cannot get software details, error %d\n", err);
842 return err;
843 }
844 }
845
846 if (WARN_ON(!dev->cfg))
847 return -ENODEV;
848
849 dev_dbg(&intf->dev, "Firmware version: %d.%d.%d\n",
850 ((dev->fw_version >> 24) & 0xff),
851 ((dev->fw_version >> 16) & 0xff),
852 (dev->fw_version & 0xffff));
853
854 dev_dbg(&intf->dev, "Max outstanding tx = %d URBs\n", dev->max_tx_urbs);
855
856 err = ops->dev_get_card_info(dev);
857 if (err) {
858 dev_err(&intf->dev, "Cannot get card info, error %d\n", err);
859 return err;
860 }
861
862 if (ops->dev_get_capabilities) {
863 err = ops->dev_get_capabilities(dev);
864 if (err) {
865 dev_err(&intf->dev,
866 "Cannot get capabilities, error %d\n", err);
867 kvaser_usb_remove_interfaces(dev);
868 return err;
869 }
870 }
871
872 for (i = 0; i < dev->nchannels; i++) {
873 err = kvaser_usb_init_one(dev, i);
874 if (err) {
875 kvaser_usb_remove_interfaces(dev);
876 return err;
877 }
878 }
879
880 return 0;
881 }
882
kvaser_usb_disconnect(struct usb_interface * intf)883 static void kvaser_usb_disconnect(struct usb_interface *intf)
884 {
885 struct kvaser_usb *dev = usb_get_intfdata(intf);
886
887 usb_set_intfdata(intf, NULL);
888
889 if (!dev)
890 return;
891
892 kvaser_usb_remove_interfaces(dev);
893 }
894
895 static struct usb_driver kvaser_usb_driver = {
896 .name = KBUILD_MODNAME,
897 .probe = kvaser_usb_probe,
898 .disconnect = kvaser_usb_disconnect,
899 .id_table = kvaser_usb_table,
900 };
901
902 module_usb_driver(kvaser_usb_driver);
903
904 MODULE_AUTHOR("Olivier Sobrie <olivier@sobrie.be>");
905 MODULE_AUTHOR("Kvaser AB <support@kvaser.com>");
906 MODULE_DESCRIPTION("CAN driver for Kvaser CAN/USB devices");
907 MODULE_LICENSE("GPL v2");
908
