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 = ops->dev_set_opt_mode(priv);
444 if (err)
445 goto error;
446
447 err = ops->dev_start_chip(priv);
448 if (err) {
449 netdev_warn(netdev, "Cannot start device, error %d\n", err);
450 goto error;
451 }
452
453 priv->can.state = CAN_STATE_ERROR_ACTIVE;
454
455 return 0;
456
457 error:
458 close_candev(netdev);
459 return err;
460 }
461
kvaser_usb_reset_tx_urb_contexts(struct kvaser_usb_net_priv * priv)462 static void kvaser_usb_reset_tx_urb_contexts(struct kvaser_usb_net_priv *priv)
463 {
464 int i, max_tx_urbs;
465
466 max_tx_urbs = priv->dev->max_tx_urbs;
467
468 priv->active_tx_contexts = 0;
469 for (i = 0; i < max_tx_urbs; i++)
470 priv->tx_contexts[i].echo_index = max_tx_urbs;
471 }
472
473 /* This method might sleep. Do not call it in the atomic context
474 * of URB completions.
475 */
kvaser_usb_unlink_tx_urbs(struct kvaser_usb_net_priv * priv)476 void kvaser_usb_unlink_tx_urbs(struct kvaser_usb_net_priv *priv)
477 {
478 usb_kill_anchored_urbs(&priv->tx_submitted);
479 kvaser_usb_reset_tx_urb_contexts(priv);
480 }
481
kvaser_usb_unlink_all_urbs(struct kvaser_usb * dev)482 static void kvaser_usb_unlink_all_urbs(struct kvaser_usb *dev)
483 {
484 int i;
485
486 usb_kill_anchored_urbs(&dev->rx_submitted);
487
488 for (i = 0; i < KVASER_USB_MAX_RX_URBS; i++)
489 usb_free_coherent(dev->udev, KVASER_USB_RX_BUFFER_SIZE,
490 dev->rxbuf[i], dev->rxbuf_dma[i]);
491
492 for (i = 0; i < dev->nchannels; i++) {
493 struct kvaser_usb_net_priv *priv = dev->nets[i];
494
495 if (priv)
496 kvaser_usb_unlink_tx_urbs(priv);
497 }
498 }
499
kvaser_usb_close(struct net_device * netdev)500 static int kvaser_usb_close(struct net_device *netdev)
501 {
502 struct kvaser_usb_net_priv *priv = netdev_priv(netdev);
503 struct kvaser_usb *dev = priv->dev;
504 const struct kvaser_usb_dev_ops *ops = dev->driver_info->ops;
505 int err;
506
507 netif_stop_queue(netdev);
508
509 err = ops->dev_flush_queue(priv);
510 if (err)
511 netdev_warn(netdev, "Cannot flush queue, error %d\n", err);
512
513 if (ops->dev_reset_chip) {
514 err = ops->dev_reset_chip(dev, priv->channel);
515 if (err)
516 netdev_warn(netdev, "Cannot reset card, error %d\n",
517 err);
518 }
519
520 err = ops->dev_stop_chip(priv);
521 if (err)
522 netdev_warn(netdev, "Cannot stop device, error %d\n", err);
523
524 /* reset tx contexts */
525 kvaser_usb_unlink_tx_urbs(priv);
526
527 priv->can.state = CAN_STATE_STOPPED;
528 close_candev(priv->netdev);
529
530 return 0;
531 }
532
kvaser_usb_set_bittiming(struct net_device * netdev)533 static int kvaser_usb_set_bittiming(struct net_device *netdev)
534 {
535 struct kvaser_usb_net_priv *priv = netdev_priv(netdev);
536 struct kvaser_usb *dev = priv->dev;
537 const struct kvaser_usb_dev_ops *ops = dev->driver_info->ops;
538 struct can_bittiming *bt = &priv->can.bittiming;
539
540 struct kvaser_usb_busparams busparams;
541 int tseg1 = bt->prop_seg + bt->phase_seg1;
542 int tseg2 = bt->phase_seg2;
543 int sjw = bt->sjw;
544 int err = -EOPNOTSUPP;
545
546 busparams.bitrate = cpu_to_le32(bt->bitrate);
547 busparams.sjw = (u8)sjw;
548 busparams.tseg1 = (u8)tseg1;
549 busparams.tseg2 = (u8)tseg2;
550 if (priv->can.ctrlmode & CAN_CTRLMODE_3_SAMPLES)
551 busparams.nsamples = 3;
552 else
553 busparams.nsamples = 1;
554
555 err = ops->dev_set_bittiming(netdev, &busparams);
556 if (err)
557 return err;
558
559 err = kvaser_usb_setup_rx_urbs(priv->dev);
560 if (err)
561 return err;
562
563 err = ops->dev_get_busparams(priv);
564 if (err) {
565 /* Treat EOPNOTSUPP as success */
566 if (err == -EOPNOTSUPP)
567 err = 0;
568 return err;
569 }
570
571 if (memcmp(&busparams, &priv->busparams_nominal,
572 sizeof(priv->busparams_nominal)) != 0)
573 err = -EINVAL;
574
575 return err;
576 }
577
kvaser_usb_set_data_bittiming(struct net_device * netdev)578 static int kvaser_usb_set_data_bittiming(struct net_device *netdev)
579 {
580 struct kvaser_usb_net_priv *priv = netdev_priv(netdev);
581 struct kvaser_usb *dev = priv->dev;
582 const struct kvaser_usb_dev_ops *ops = dev->driver_info->ops;
583 struct can_bittiming *dbt = &priv->can.data_bittiming;
584
585 struct kvaser_usb_busparams busparams;
586 int tseg1 = dbt->prop_seg + dbt->phase_seg1;
587 int tseg2 = dbt->phase_seg2;
588 int sjw = dbt->sjw;
589 int err;
590
591 if (!ops->dev_set_data_bittiming ||
592 !ops->dev_get_data_busparams)
593 return -EOPNOTSUPP;
594
595 busparams.bitrate = cpu_to_le32(dbt->bitrate);
596 busparams.sjw = (u8)sjw;
597 busparams.tseg1 = (u8)tseg1;
598 busparams.tseg2 = (u8)tseg2;
599 busparams.nsamples = 1;
600
601 err = ops->dev_set_data_bittiming(netdev, &busparams);
602 if (err)
603 return err;
604
605 err = kvaser_usb_setup_rx_urbs(priv->dev);
606 if (err)
607 return err;
608
609 err = ops->dev_get_data_busparams(priv);
610 if (err)
611 return err;
612
613 if (memcmp(&busparams, &priv->busparams_data,
614 sizeof(priv->busparams_data)) != 0)
615 err = -EINVAL;
616
617 return err;
618 }
619
kvaser_usb_write_bulk_callback(struct urb * urb)620 static void kvaser_usb_write_bulk_callback(struct urb *urb)
621 {
622 struct kvaser_usb_tx_urb_context *context = urb->context;
623 struct kvaser_usb_net_priv *priv;
624 struct net_device *netdev;
625
626 if (WARN_ON(!context))
627 return;
628
629 priv = context->priv;
630 netdev = priv->netdev;
631
632 kfree(urb->transfer_buffer);
633
634 if (!netif_device_present(netdev))
635 return;
636
637 if (urb->status)
638 netdev_info(netdev, "Tx URB aborted (%d)\n", urb->status);
639 }
640
kvaser_usb_start_xmit(struct sk_buff * skb,struct net_device * netdev)641 static netdev_tx_t kvaser_usb_start_xmit(struct sk_buff *skb,
642 struct net_device *netdev)
643 {
644 struct kvaser_usb_net_priv *priv = netdev_priv(netdev);
645 struct kvaser_usb *dev = priv->dev;
646 const struct kvaser_usb_dev_ops *ops = dev->driver_info->ops;
647 struct net_device_stats *stats = &netdev->stats;
648 struct kvaser_usb_tx_urb_context *context = NULL;
649 struct urb *urb;
650 void *buf;
651 int cmd_len = 0;
652 int err, ret = NETDEV_TX_OK;
653 unsigned int i;
654 unsigned long flags;
655
656 if (can_dev_dropped_skb(netdev, skb))
657 return NETDEV_TX_OK;
658
659 urb = usb_alloc_urb(0, GFP_ATOMIC);
660 if (!urb) {
661 stats->tx_dropped++;
662 dev_kfree_skb(skb);
663 return NETDEV_TX_OK;
664 }
665
666 spin_lock_irqsave(&priv->tx_contexts_lock, flags);
667 for (i = 0; i < dev->max_tx_urbs; i++) {
668 if (priv->tx_contexts[i].echo_index == dev->max_tx_urbs) {
669 context = &priv->tx_contexts[i];
670
671 context->echo_index = i;
672 ++priv->active_tx_contexts;
673 if (priv->active_tx_contexts >= (int)dev->max_tx_urbs)
674 netif_stop_queue(netdev);
675
676 break;
677 }
678 }
679 spin_unlock_irqrestore(&priv->tx_contexts_lock, flags);
680
681 /* This should never happen; it implies a flow control bug */
682 if (!context) {
683 netdev_warn(netdev, "cannot find free context\n");
684
685 ret = NETDEV_TX_BUSY;
686 goto freeurb;
687 }
688
689 buf = ops->dev_frame_to_cmd(priv, skb, &cmd_len, context->echo_index);
690 if (!buf) {
691 stats->tx_dropped++;
692 dev_kfree_skb(skb);
693 spin_lock_irqsave(&priv->tx_contexts_lock, flags);
694
695 context->echo_index = dev->max_tx_urbs;
696 --priv->active_tx_contexts;
697 netif_wake_queue(netdev);
698
699 spin_unlock_irqrestore(&priv->tx_contexts_lock, flags);
700 goto freeurb;
701 }
702
703 context->priv = priv;
704
705 can_put_echo_skb(skb, netdev, context->echo_index, 0);
706
707 usb_fill_bulk_urb(urb, dev->udev,
708 usb_sndbulkpipe(dev->udev,
709 dev->bulk_out->bEndpointAddress),
710 buf, cmd_len, kvaser_usb_write_bulk_callback,
711 context);
712 usb_anchor_urb(urb, &priv->tx_submitted);
713
714 err = usb_submit_urb(urb, GFP_ATOMIC);
715 if (unlikely(err)) {
716 spin_lock_irqsave(&priv->tx_contexts_lock, flags);
717
718 can_free_echo_skb(netdev, context->echo_index, NULL);
719 context->echo_index = dev->max_tx_urbs;
720 --priv->active_tx_contexts;
721 netif_wake_queue(netdev);
722
723 spin_unlock_irqrestore(&priv->tx_contexts_lock, flags);
724
725 usb_unanchor_urb(urb);
726 kfree(buf);
727
728 stats->tx_dropped++;
729
730 if (err == -ENODEV)
731 netif_device_detach(netdev);
732 else
733 netdev_warn(netdev, "Failed tx_urb %d\n", err);
734
735 goto freeurb;
736 }
737
738 ret = NETDEV_TX_OK;
739
740 freeurb:
741 usb_free_urb(urb);
742 return ret;
743 }
744
745 static const struct net_device_ops kvaser_usb_netdev_ops = {
746 .ndo_open = kvaser_usb_open,
747 .ndo_stop = kvaser_usb_close,
748 .ndo_start_xmit = kvaser_usb_start_xmit,
749 .ndo_change_mtu = can_change_mtu,
750 };
751
752 static const struct net_device_ops kvaser_usb_netdev_ops_hwts = {
753 .ndo_open = kvaser_usb_open,
754 .ndo_stop = kvaser_usb_close,
755 .ndo_eth_ioctl = can_eth_ioctl_hwts,
756 .ndo_start_xmit = kvaser_usb_start_xmit,
757 .ndo_change_mtu = can_change_mtu,
758 };
759
760 static const struct ethtool_ops kvaser_usb_ethtool_ops = {
761 .get_ts_info = ethtool_op_get_ts_info,
762 };
763
764 static const struct ethtool_ops kvaser_usb_ethtool_ops_hwts = {
765 .get_ts_info = can_ethtool_op_get_ts_info_hwts,
766 };
767
kvaser_usb_remove_interfaces(struct kvaser_usb * dev)768 static void kvaser_usb_remove_interfaces(struct kvaser_usb *dev)
769 {
770 const struct kvaser_usb_dev_ops *ops = dev->driver_info->ops;
771 int i;
772
773 for (i = 0; i < dev->nchannels; i++) {
774 if (!dev->nets[i])
775 continue;
776
777 unregister_candev(dev->nets[i]->netdev);
778 }
779
780 kvaser_usb_unlink_all_urbs(dev);
781
782 for (i = 0; i < dev->nchannels; i++) {
783 if (!dev->nets[i])
784 continue;
785
786 if (ops->dev_remove_channel)
787 ops->dev_remove_channel(dev->nets[i]);
788
789 free_candev(dev->nets[i]->netdev);
790 }
791 }
792
kvaser_usb_init_one(struct kvaser_usb * dev,int channel)793 static int kvaser_usb_init_one(struct kvaser_usb *dev, int channel)
794 {
795 struct net_device *netdev;
796 struct kvaser_usb_net_priv *priv;
797 const struct kvaser_usb_driver_info *driver_info = dev->driver_info;
798 const struct kvaser_usb_dev_ops *ops = driver_info->ops;
799 int err;
800
801 if (ops->dev_reset_chip) {
802 err = ops->dev_reset_chip(dev, channel);
803 if (err)
804 return err;
805 }
806
807 netdev = alloc_candev(struct_size(priv, tx_contexts, dev->max_tx_urbs),
808 dev->max_tx_urbs);
809 if (!netdev) {
810 dev_err(&dev->intf->dev, "Cannot alloc candev\n");
811 return -ENOMEM;
812 }
813
814 priv = netdev_priv(netdev);
815
816 init_usb_anchor(&priv->tx_submitted);
817 init_completion(&priv->start_comp);
818 init_completion(&priv->stop_comp);
819 init_completion(&priv->flush_comp);
820 init_completion(&priv->get_busparams_comp);
821 priv->can.ctrlmode_supported = 0;
822
823 priv->dev = dev;
824 priv->netdev = netdev;
825 priv->channel = channel;
826
827 spin_lock_init(&priv->tx_contexts_lock);
828 kvaser_usb_reset_tx_urb_contexts(priv);
829
830 priv->can.state = CAN_STATE_STOPPED;
831 priv->can.clock.freq = dev->cfg->clock.freq;
832 priv->can.bittiming_const = dev->cfg->bittiming_const;
833 priv->can.do_set_bittiming = kvaser_usb_set_bittiming;
834 priv->can.do_set_mode = ops->dev_set_mode;
835 if ((driver_info->quirks & KVASER_USB_QUIRK_HAS_TXRX_ERRORS) ||
836 (priv->dev->card_data.capabilities & KVASER_USB_CAP_BERR_CAP))
837 priv->can.do_get_berr_counter = ops->dev_get_berr_counter;
838 if (driver_info->quirks & KVASER_USB_QUIRK_HAS_SILENT_MODE)
839 priv->can.ctrlmode_supported |= CAN_CTRLMODE_LISTENONLY;
840
841 priv->can.ctrlmode_supported |= dev->card_data.ctrlmode_supported;
842
843 if (priv->can.ctrlmode_supported & CAN_CTRLMODE_FD) {
844 priv->can.data_bittiming_const = dev->cfg->data_bittiming_const;
845 priv->can.do_set_data_bittiming = kvaser_usb_set_data_bittiming;
846 }
847
848 netdev->flags |= IFF_ECHO;
849
850 netdev->netdev_ops = &kvaser_usb_netdev_ops;
851 if (driver_info->quirks & KVASER_USB_QUIRK_HAS_HARDWARE_TIMESTAMP) {
852 netdev->netdev_ops = &kvaser_usb_netdev_ops_hwts;
853 netdev->ethtool_ops = &kvaser_usb_ethtool_ops_hwts;
854 } else {
855 netdev->netdev_ops = &kvaser_usb_netdev_ops;
856 netdev->ethtool_ops = &kvaser_usb_ethtool_ops;
857 }
858 SET_NETDEV_DEV(netdev, &dev->intf->dev);
859 netdev->dev_id = channel;
860
861 dev->nets[channel] = priv;
862
863 if (ops->dev_init_channel) {
864 err = ops->dev_init_channel(priv);
865 if (err)
866 goto err;
867 }
868
869 err = register_candev(netdev);
870 if (err) {
871 dev_err(&dev->intf->dev, "Failed to register CAN device\n");
872 goto err;
873 }
874
875 netdev_dbg(netdev, "device registered\n");
876
877 return 0;
878
879 err:
880 free_candev(netdev);
881 dev->nets[channel] = NULL;
882 return err;
883 }
884
kvaser_usb_probe(struct usb_interface * intf,const struct usb_device_id * id)885 static int kvaser_usb_probe(struct usb_interface *intf,
886 const struct usb_device_id *id)
887 {
888 struct kvaser_usb *dev;
889 int err;
890 int i;
891 const struct kvaser_usb_driver_info *driver_info;
892 const struct kvaser_usb_dev_ops *ops;
893
894 driver_info = (const struct kvaser_usb_driver_info *)id->driver_info;
895 if (!driver_info)
896 return -ENODEV;
897
898 dev = devm_kzalloc(&intf->dev, sizeof(*dev), GFP_KERNEL);
899 if (!dev)
900 return -ENOMEM;
901
902 dev->intf = intf;
903 dev->driver_info = driver_info;
904 ops = driver_info->ops;
905
906 err = ops->dev_setup_endpoints(dev);
907 if (err) {
908 dev_err(&intf->dev, "Cannot get usb endpoint(s)");
909 return err;
910 }
911
912 dev->udev = interface_to_usbdev(intf);
913
914 init_usb_anchor(&dev->rx_submitted);
915
916 usb_set_intfdata(intf, dev);
917
918 dev->card_data.ctrlmode_supported = 0;
919 dev->card_data.capabilities = 0;
920 err = ops->dev_init_card(dev);
921 if (err) {
922 dev_err(&intf->dev,
923 "Failed to initialize card, error %d\n", err);
924 return err;
925 }
926
927 err = ops->dev_get_software_info(dev);
928 if (err) {
929 dev_err(&intf->dev,
930 "Cannot get software info, error %d\n", err);
931 return err;
932 }
933
934 if (ops->dev_get_software_details) {
935 err = ops->dev_get_software_details(dev);
936 if (err) {
937 dev_err(&intf->dev,
938 "Cannot get software details, error %d\n", err);
939 return err;
940 }
941 }
942
943 if (WARN_ON(!dev->cfg))
944 return -ENODEV;
945
946 dev_dbg(&intf->dev, "Firmware version: %d.%d.%d\n",
947 ((dev->fw_version >> 24) & 0xff),
948 ((dev->fw_version >> 16) & 0xff),
949 (dev->fw_version & 0xffff));
950
951 dev_dbg(&intf->dev, "Max outstanding tx = %d URBs\n", dev->max_tx_urbs);
952
953 err = ops->dev_get_card_info(dev);
954 if (err) {
955 dev_err(&intf->dev, "Cannot get card info, error %d\n", err);
956 return err;
957 }
958
959 if (ops->dev_get_capabilities) {
960 err = ops->dev_get_capabilities(dev);
961 if (err) {
962 dev_err(&intf->dev,
963 "Cannot get capabilities, error %d\n", err);
964 kvaser_usb_remove_interfaces(dev);
965 return err;
966 }
967 }
968
969 for (i = 0; i < dev->nchannels; i++) {
970 err = kvaser_usb_init_one(dev, i);
971 if (err) {
972 kvaser_usb_remove_interfaces(dev);
973 return err;
974 }
975 }
976
977 return 0;
978 }
979
kvaser_usb_disconnect(struct usb_interface * intf)980 static void kvaser_usb_disconnect(struct usb_interface *intf)
981 {
982 struct kvaser_usb *dev = usb_get_intfdata(intf);
983
984 usb_set_intfdata(intf, NULL);
985
986 if (!dev)
987 return;
988
989 kvaser_usb_remove_interfaces(dev);
990 }
991
992 static struct usb_driver kvaser_usb_driver = {
993 .name = KBUILD_MODNAME,
994 .probe = kvaser_usb_probe,
995 .disconnect = kvaser_usb_disconnect,
996 .id_table = kvaser_usb_table,
997 };
998
999 module_usb_driver(kvaser_usb_driver);
1000
1001 MODULE_AUTHOR("Olivier Sobrie <olivier@sobrie.be>");
1002 MODULE_AUTHOR("Kvaser AB <support@kvaser.com>");
1003 MODULE_DESCRIPTION("CAN driver for Kvaser CAN/USB devices");
1004 MODULE_LICENSE("GPL v2");
1005