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 0x000a
38 #define USB_LEAF_LITE_PRODUCT_ID 0x000b
39 #define USB_LEAF_PRO_PRODUCT_ID 0x000c
40 #define USB_LEAF_SPRO_PRODUCT_ID 0x000e
41 #define USB_LEAF_PRO_LS_PRODUCT_ID 0x000f
42 #define USB_LEAF_PRO_SWC_PRODUCT_ID 0x0010
43 #define USB_LEAF_PRO_LIN_PRODUCT_ID 0x0011
44 #define USB_LEAF_SPRO_LS_PRODUCT_ID 0x0012
45 #define USB_LEAF_SPRO_SWC_PRODUCT_ID 0x0013
46 #define USB_MEMO2_DEVEL_PRODUCT_ID 0x0016
47 #define USB_MEMO2_HSHS_PRODUCT_ID 0x0017
48 #define USB_UPRO_HSHS_PRODUCT_ID 0x0018
49 #define USB_LEAF_LITE_GI_PRODUCT_ID 0x0019
50 #define USB_LEAF_PRO_OBDII_PRODUCT_ID 0x001a
51 #define USB_MEMO2_HSLS_PRODUCT_ID 0x001b
52 #define USB_LEAF_LITE_CH_PRODUCT_ID 0x001c
53 #define USB_BLACKBIRD_SPRO_PRODUCT_ID 0x001d
54 #define USB_OEM_MERCURY_PRODUCT_ID 0x0022
55 #define USB_OEM_LEAF_PRODUCT_ID 0x0023
56 #define USB_CAN_R_PRODUCT_ID 0x0027
57 #define USB_LEAF_LITE_V2_PRODUCT_ID 0x0120
58 #define USB_MINI_PCIE_HS_PRODUCT_ID 0x0121
59 #define USB_LEAF_LIGHT_HS_V2_OEM_PRODUCT_ID 0x0122
60 #define USB_USBCAN_LIGHT_2HS_PRODUCT_ID 0x0123
61 #define USB_MINI_PCIE_2HS_PRODUCT_ID 0x0124
62 #define USB_USBCAN_R_V2_PRODUCT_ID 0x0126
63 #define USB_LEAF_LIGHT_R_V2_PRODUCT_ID 0x0127
64 #define USB_LEAF_LIGHT_HS_V2_OEM2_PRODUCT_ID 0x0128
65
66 /* Kvaser USBCan-II devices product ids */
67 #define USB_USBCAN_REVB_PRODUCT_ID 0x0002
68 #define USB_VCI2_PRODUCT_ID 0x0003
69 #define USB_USBCAN2_PRODUCT_ID 0x0004
70 #define USB_MEMORATOR_PRODUCT_ID 0x0005
71
72 /* Kvaser Minihydra USB devices product ids */
73 #define USB_BLACKBIRD_V2_PRODUCT_ID 0x0102
74 #define USB_MEMO_PRO_5HS_PRODUCT_ID 0x0104
75 #define USB_USBCAN_PRO_5HS_PRODUCT_ID 0x0105
76 #define USB_USBCAN_LIGHT_4HS_PRODUCT_ID 0x0106
77 #define USB_LEAF_PRO_HS_V2_PRODUCT_ID 0x0107
78 #define USB_USBCAN_PRO_2HS_V2_PRODUCT_ID 0x0108
79 #define USB_MEMO_2HS_PRODUCT_ID 0x0109
80 #define USB_MEMO_PRO_2HS_V2_PRODUCT_ID 0x010a
81 #define USB_HYBRID_2CANLIN_PRODUCT_ID 0x010b
82 #define USB_ATI_USBCAN_PRO_2HS_V2_PRODUCT_ID 0x010c
83 #define USB_ATI_MEMO_PRO_2HS_V2_PRODUCT_ID 0x010d
84 #define USB_HYBRID_PRO_2CANLIN_PRODUCT_ID 0x010e
85 #define USB_U100_PRODUCT_ID 0x0111
86 #define USB_U100P_PRODUCT_ID 0x0112
87 #define USB_U100S_PRODUCT_ID 0x0113
88 #define USB_USBCAN_PRO_4HS_PRODUCT_ID 0x0114
89 #define USB_HYBRID_CANLIN_PRODUCT_ID 0x0115
90 #define USB_HYBRID_PRO_CANLIN_PRODUCT_ID 0x0116
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 .family = KVASER_LEAF,
128 .ops = &kvaser_usb_leaf_dev_ops,
129 };
130
131 static const struct usb_device_id kvaser_usb_table[] = {
132 /* Leaf M32C USB product IDs */
133 { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_DEVEL_PRODUCT_ID),
134 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_leaf },
135 { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_LITE_PRODUCT_ID),
136 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_leaf },
137 { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_PRO_PRODUCT_ID),
138 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_leaf_err_listen },
139 { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_SPRO_PRODUCT_ID),
140 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_leaf_err_listen },
141 { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_PRO_LS_PRODUCT_ID),
142 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_leaf_err_listen },
143 { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_PRO_SWC_PRODUCT_ID),
144 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_leaf_err_listen },
145 { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_PRO_LIN_PRODUCT_ID),
146 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_leaf_err_listen },
147 { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_SPRO_LS_PRODUCT_ID),
148 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_leaf_err_listen },
149 { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_SPRO_SWC_PRODUCT_ID),
150 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_leaf_err_listen },
151 { USB_DEVICE(KVASER_VENDOR_ID, USB_MEMO2_DEVEL_PRODUCT_ID),
152 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_leaf_err_listen },
153 { USB_DEVICE(KVASER_VENDOR_ID, USB_MEMO2_HSHS_PRODUCT_ID),
154 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_leaf_err_listen },
155 { USB_DEVICE(KVASER_VENDOR_ID, USB_UPRO_HSHS_PRODUCT_ID),
156 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_leaf_err },
157 { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_LITE_GI_PRODUCT_ID),
158 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_leaf },
159 { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_PRO_OBDII_PRODUCT_ID),
160 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_leaf_err_listen },
161 { USB_DEVICE(KVASER_VENDOR_ID, USB_MEMO2_HSLS_PRODUCT_ID),
162 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_leaf_err },
163 { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_LITE_CH_PRODUCT_ID),
164 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_leaf_err },
165 { USB_DEVICE(KVASER_VENDOR_ID, USB_BLACKBIRD_SPRO_PRODUCT_ID),
166 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_leaf_err },
167 { USB_DEVICE(KVASER_VENDOR_ID, USB_OEM_MERCURY_PRODUCT_ID),
168 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_leaf_err },
169 { USB_DEVICE(KVASER_VENDOR_ID, USB_OEM_LEAF_PRODUCT_ID),
170 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_leaf_err },
171 { USB_DEVICE(KVASER_VENDOR_ID, USB_CAN_R_PRODUCT_ID),
172 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_leaf_err },
173
174 /* Leaf i.MX28 USB product IDs */
175 { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_LITE_V2_PRODUCT_ID),
176 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_leafimx },
177 { USB_DEVICE(KVASER_VENDOR_ID, USB_MINI_PCIE_HS_PRODUCT_ID),
178 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_leafimx },
179 { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_LIGHT_HS_V2_OEM_PRODUCT_ID),
180 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_leafimx },
181 { USB_DEVICE(KVASER_VENDOR_ID, USB_USBCAN_LIGHT_2HS_PRODUCT_ID),
182 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_leafimx },
183 { USB_DEVICE(KVASER_VENDOR_ID, USB_MINI_PCIE_2HS_PRODUCT_ID),
184 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_leafimx },
185 { USB_DEVICE(KVASER_VENDOR_ID, USB_USBCAN_R_V2_PRODUCT_ID),
186 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_leafimx },
187 { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_LIGHT_R_V2_PRODUCT_ID),
188 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_leafimx },
189 { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_LIGHT_HS_V2_OEM2_PRODUCT_ID),
190 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_leafimx },
191
192 /* USBCANII USB product IDs */
193 { USB_DEVICE(KVASER_VENDOR_ID, USB_USBCAN2_PRODUCT_ID),
194 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_usbcan },
195 { USB_DEVICE(KVASER_VENDOR_ID, USB_USBCAN_REVB_PRODUCT_ID),
196 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_usbcan },
197 { USB_DEVICE(KVASER_VENDOR_ID, USB_MEMORATOR_PRODUCT_ID),
198 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_usbcan },
199 { USB_DEVICE(KVASER_VENDOR_ID, USB_VCI2_PRODUCT_ID),
200 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_usbcan },
201
202 /* Minihydra USB product IDs */
203 { USB_DEVICE(KVASER_VENDOR_ID, USB_BLACKBIRD_V2_PRODUCT_ID),
204 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_hydra },
205 { USB_DEVICE(KVASER_VENDOR_ID, USB_MEMO_PRO_5HS_PRODUCT_ID),
206 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_hydra },
207 { USB_DEVICE(KVASER_VENDOR_ID, USB_USBCAN_PRO_5HS_PRODUCT_ID),
208 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_hydra },
209 { USB_DEVICE(KVASER_VENDOR_ID, USB_USBCAN_LIGHT_4HS_PRODUCT_ID),
210 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_hydra },
211 { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_PRO_HS_V2_PRODUCT_ID),
212 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_hydra },
213 { USB_DEVICE(KVASER_VENDOR_ID, USB_USBCAN_PRO_2HS_V2_PRODUCT_ID),
214 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_hydra },
215 { USB_DEVICE(KVASER_VENDOR_ID, USB_MEMO_2HS_PRODUCT_ID),
216 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_hydra },
217 { USB_DEVICE(KVASER_VENDOR_ID, USB_MEMO_PRO_2HS_V2_PRODUCT_ID),
218 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_hydra },
219 { USB_DEVICE(KVASER_VENDOR_ID, USB_HYBRID_2CANLIN_PRODUCT_ID),
220 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_hydra },
221 { USB_DEVICE(KVASER_VENDOR_ID, USB_ATI_USBCAN_PRO_2HS_V2_PRODUCT_ID),
222 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_hydra },
223 { USB_DEVICE(KVASER_VENDOR_ID, USB_ATI_MEMO_PRO_2HS_V2_PRODUCT_ID),
224 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_hydra },
225 { USB_DEVICE(KVASER_VENDOR_ID, USB_HYBRID_PRO_2CANLIN_PRODUCT_ID),
226 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_hydra },
227 { USB_DEVICE(KVASER_VENDOR_ID, USB_U100_PRODUCT_ID),
228 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_hydra },
229 { USB_DEVICE(KVASER_VENDOR_ID, USB_U100P_PRODUCT_ID),
230 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_hydra },
231 { USB_DEVICE(KVASER_VENDOR_ID, USB_U100S_PRODUCT_ID),
232 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_hydra },
233 { USB_DEVICE(KVASER_VENDOR_ID, USB_USBCAN_PRO_4HS_PRODUCT_ID),
234 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_hydra },
235 { USB_DEVICE(KVASER_VENDOR_ID, USB_HYBRID_CANLIN_PRODUCT_ID),
236 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_hydra },
237 { USB_DEVICE(KVASER_VENDOR_ID, USB_HYBRID_PRO_CANLIN_PRODUCT_ID),
238 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_hydra },
239 { }
240 };
241 MODULE_DEVICE_TABLE(usb, kvaser_usb_table);
242
kvaser_usb_send_cmd(const struct kvaser_usb * dev,void * cmd,int len)243 int kvaser_usb_send_cmd(const struct kvaser_usb *dev, void *cmd, int len)
244 {
245 return usb_bulk_msg(dev->udev,
246 usb_sndbulkpipe(dev->udev,
247 dev->bulk_out->bEndpointAddress),
248 cmd, len, NULL, KVASER_USB_TIMEOUT);
249 }
250
kvaser_usb_recv_cmd(const struct kvaser_usb * dev,void * cmd,int len,int * actual_len)251 int kvaser_usb_recv_cmd(const struct kvaser_usb *dev, void *cmd, int len,
252 int *actual_len)
253 {
254 return usb_bulk_msg(dev->udev,
255 usb_rcvbulkpipe(dev->udev,
256 dev->bulk_in->bEndpointAddress),
257 cmd, len, actual_len, KVASER_USB_TIMEOUT);
258 }
259
kvaser_usb_send_cmd_callback(struct urb * urb)260 static void kvaser_usb_send_cmd_callback(struct urb *urb)
261 {
262 struct net_device *netdev = urb->context;
263
264 kfree(urb->transfer_buffer);
265
266 if (urb->status)
267 netdev_warn(netdev, "urb status received: %d\n", urb->status);
268 }
269
kvaser_usb_send_cmd_async(struct kvaser_usb_net_priv * priv,void * cmd,int len)270 int kvaser_usb_send_cmd_async(struct kvaser_usb_net_priv *priv, void *cmd,
271 int len)
272 {
273 struct kvaser_usb *dev = priv->dev;
274 struct net_device *netdev = priv->netdev;
275 struct urb *urb;
276 int err;
277
278 urb = usb_alloc_urb(0, GFP_ATOMIC);
279 if (!urb)
280 return -ENOMEM;
281
282 usb_fill_bulk_urb(urb, dev->udev,
283 usb_sndbulkpipe(dev->udev,
284 dev->bulk_out->bEndpointAddress),
285 cmd, len, kvaser_usb_send_cmd_callback, netdev);
286 usb_anchor_urb(urb, &priv->tx_submitted);
287
288 err = usb_submit_urb(urb, GFP_ATOMIC);
289 if (err) {
290 netdev_err(netdev, "Error transmitting URB\n");
291 usb_unanchor_urb(urb);
292 }
293 usb_free_urb(urb);
294
295 return err;
296 }
297
kvaser_usb_can_rx_over_error(struct net_device * netdev)298 int kvaser_usb_can_rx_over_error(struct net_device *netdev)
299 {
300 struct net_device_stats *stats = &netdev->stats;
301 struct can_frame *cf;
302 struct sk_buff *skb;
303
304 stats->rx_over_errors++;
305 stats->rx_errors++;
306
307 skb = alloc_can_err_skb(netdev, &cf);
308 if (!skb) {
309 stats->rx_dropped++;
310 netdev_warn(netdev, "No memory left for err_skb\n");
311 return -ENOMEM;
312 }
313
314 cf->can_id |= CAN_ERR_CRTL;
315 cf->data[1] = CAN_ERR_CRTL_RX_OVERFLOW;
316
317 netif_rx(skb);
318
319 return 0;
320 }
321
kvaser_usb_read_bulk_callback(struct urb * urb)322 static void kvaser_usb_read_bulk_callback(struct urb *urb)
323 {
324 struct kvaser_usb *dev = urb->context;
325 const struct kvaser_usb_dev_ops *ops = dev->driver_info->ops;
326 int err;
327 unsigned int i;
328
329 switch (urb->status) {
330 case 0:
331 break;
332 case -ENOENT:
333 case -EPIPE:
334 case -EPROTO:
335 case -ESHUTDOWN:
336 return;
337 default:
338 dev_info(&dev->intf->dev, "Rx URB aborted (%d)\n", urb->status);
339 goto resubmit_urb;
340 }
341
342 ops->dev_read_bulk_callback(dev, urb->transfer_buffer,
343 urb->actual_length);
344
345 resubmit_urb:
346 usb_fill_bulk_urb(urb, dev->udev,
347 usb_rcvbulkpipe(dev->udev,
348 dev->bulk_in->bEndpointAddress),
349 urb->transfer_buffer, KVASER_USB_RX_BUFFER_SIZE,
350 kvaser_usb_read_bulk_callback, dev);
351
352 err = usb_submit_urb(urb, GFP_ATOMIC);
353 if (err == -ENODEV) {
354 for (i = 0; i < dev->nchannels; i++) {
355 if (!dev->nets[i])
356 continue;
357
358 netif_device_detach(dev->nets[i]->netdev);
359 }
360 } else if (err) {
361 dev_err(&dev->intf->dev,
362 "Failed resubmitting read bulk urb: %d\n", err);
363 }
364 }
365
kvaser_usb_setup_rx_urbs(struct kvaser_usb * dev)366 static int kvaser_usb_setup_rx_urbs(struct kvaser_usb *dev)
367 {
368 int i, err = 0;
369
370 if (dev->rxinitdone)
371 return 0;
372
373 for (i = 0; i < KVASER_USB_MAX_RX_URBS; i++) {
374 struct urb *urb = NULL;
375 u8 *buf = NULL;
376 dma_addr_t buf_dma;
377
378 urb = usb_alloc_urb(0, GFP_KERNEL);
379 if (!urb) {
380 err = -ENOMEM;
381 break;
382 }
383
384 buf = usb_alloc_coherent(dev->udev, KVASER_USB_RX_BUFFER_SIZE,
385 GFP_KERNEL, &buf_dma);
386 if (!buf) {
387 dev_warn(&dev->intf->dev,
388 "No memory left for USB buffer\n");
389 usb_free_urb(urb);
390 err = -ENOMEM;
391 break;
392 }
393
394 usb_fill_bulk_urb(urb, dev->udev,
395 usb_rcvbulkpipe
396 (dev->udev,
397 dev->bulk_in->bEndpointAddress),
398 buf, KVASER_USB_RX_BUFFER_SIZE,
399 kvaser_usb_read_bulk_callback, dev);
400 urb->transfer_dma = buf_dma;
401 urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
402 usb_anchor_urb(urb, &dev->rx_submitted);
403
404 err = usb_submit_urb(urb, GFP_KERNEL);
405 if (err) {
406 usb_unanchor_urb(urb);
407 usb_free_coherent(dev->udev,
408 KVASER_USB_RX_BUFFER_SIZE, buf,
409 buf_dma);
410 usb_free_urb(urb);
411 break;
412 }
413
414 dev->rxbuf[i] = buf;
415 dev->rxbuf_dma[i] = buf_dma;
416
417 usb_free_urb(urb);
418 }
419
420 if (i == 0) {
421 dev_warn(&dev->intf->dev, "Cannot setup read URBs, error %d\n",
422 err);
423 return err;
424 } else if (i < KVASER_USB_MAX_RX_URBS) {
425 dev_warn(&dev->intf->dev, "RX performances may be slow\n");
426 }
427
428 dev->rxinitdone = true;
429
430 return 0;
431 }
432
kvaser_usb_open(struct net_device * netdev)433 static int kvaser_usb_open(struct net_device *netdev)
434 {
435 struct kvaser_usb_net_priv *priv = netdev_priv(netdev);
436 struct kvaser_usb *dev = priv->dev;
437 const struct kvaser_usb_dev_ops *ops = dev->driver_info->ops;
438 int err;
439
440 err = open_candev(netdev);
441 if (err)
442 return err;
443
444 err = ops->dev_set_opt_mode(priv);
445 if (err)
446 goto error;
447
448 err = ops->dev_start_chip(priv);
449 if (err) {
450 netdev_warn(netdev, "Cannot start device, error %d\n", err);
451 goto error;
452 }
453
454 priv->can.state = CAN_STATE_ERROR_ACTIVE;
455
456 return 0;
457
458 error:
459 close_candev(netdev);
460 return err;
461 }
462
kvaser_usb_reset_tx_urb_contexts(struct kvaser_usb_net_priv * priv)463 static void kvaser_usb_reset_tx_urb_contexts(struct kvaser_usb_net_priv *priv)
464 {
465 int i, max_tx_urbs;
466
467 max_tx_urbs = priv->dev->max_tx_urbs;
468
469 priv->active_tx_contexts = 0;
470 for (i = 0; i < max_tx_urbs; i++)
471 priv->tx_contexts[i].echo_index = max_tx_urbs;
472 }
473
474 /* This method might sleep. Do not call it in the atomic context
475 * of URB completions.
476 */
kvaser_usb_unlink_tx_urbs(struct kvaser_usb_net_priv * priv)477 void kvaser_usb_unlink_tx_urbs(struct kvaser_usb_net_priv *priv)
478 {
479 usb_kill_anchored_urbs(&priv->tx_submitted);
480 kvaser_usb_reset_tx_urb_contexts(priv);
481 }
482
kvaser_usb_unlink_all_urbs(struct kvaser_usb * dev)483 static void kvaser_usb_unlink_all_urbs(struct kvaser_usb *dev)
484 {
485 int i;
486
487 usb_kill_anchored_urbs(&dev->rx_submitted);
488
489 for (i = 0; i < KVASER_USB_MAX_RX_URBS; i++)
490 usb_free_coherent(dev->udev, KVASER_USB_RX_BUFFER_SIZE,
491 dev->rxbuf[i], dev->rxbuf_dma[i]);
492
493 for (i = 0; i < dev->nchannels; i++) {
494 struct kvaser_usb_net_priv *priv = dev->nets[i];
495
496 if (priv)
497 kvaser_usb_unlink_tx_urbs(priv);
498 }
499 }
500
kvaser_usb_close(struct net_device * netdev)501 static int kvaser_usb_close(struct net_device *netdev)
502 {
503 struct kvaser_usb_net_priv *priv = netdev_priv(netdev);
504 struct kvaser_usb *dev = priv->dev;
505 const struct kvaser_usb_dev_ops *ops = dev->driver_info->ops;
506 int err;
507
508 netif_stop_queue(netdev);
509
510 err = ops->dev_flush_queue(priv);
511 if (err)
512 netdev_warn(netdev, "Cannot flush queue, error %d\n", err);
513
514 if (ops->dev_reset_chip) {
515 err = ops->dev_reset_chip(dev, priv->channel);
516 if (err)
517 netdev_warn(netdev, "Cannot reset card, error %d\n",
518 err);
519 }
520
521 err = ops->dev_stop_chip(priv);
522 if (err)
523 netdev_warn(netdev, "Cannot stop device, error %d\n", err);
524
525 /* reset tx contexts */
526 kvaser_usb_unlink_tx_urbs(priv);
527
528 priv->can.state = CAN_STATE_STOPPED;
529 close_candev(priv->netdev);
530
531 return 0;
532 }
533
kvaser_usb_set_bittiming(struct net_device * netdev)534 static int kvaser_usb_set_bittiming(struct net_device *netdev)
535 {
536 struct kvaser_usb_net_priv *priv = netdev_priv(netdev);
537 struct kvaser_usb *dev = priv->dev;
538 const struct kvaser_usb_dev_ops *ops = dev->driver_info->ops;
539 struct can_bittiming *bt = &priv->can.bittiming;
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;
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 struct kvaser_usb_busparams busparams;
585 int tseg1 = dbt->prop_seg + dbt->phase_seg1;
586 int tseg2 = dbt->phase_seg2;
587 int sjw = dbt->sjw;
588 int err;
589
590 if (!ops->dev_set_data_bittiming ||
591 !ops->dev_get_data_busparams)
592 return -EOPNOTSUPP;
593
594 busparams.bitrate = cpu_to_le32(dbt->bitrate);
595 busparams.sjw = (u8)sjw;
596 busparams.tseg1 = (u8)tseg1;
597 busparams.tseg2 = (u8)tseg2;
598 busparams.nsamples = 1;
599
600 err = ops->dev_set_data_bittiming(netdev, &busparams);
601 if (err)
602 return err;
603
604 err = kvaser_usb_setup_rx_urbs(priv->dev);
605 if (err)
606 return err;
607
608 err = ops->dev_get_data_busparams(priv);
609 if (err)
610 return err;
611
612 if (memcmp(&busparams, &priv->busparams_data,
613 sizeof(priv->busparams_data)) != 0)
614 err = -EINVAL;
615
616 return err;
617 }
618
kvaser_usb_write_bulk_callback(struct urb * urb)619 static void kvaser_usb_write_bulk_callback(struct urb *urb)
620 {
621 struct kvaser_usb_tx_urb_context *context = urb->context;
622 struct kvaser_usb_net_priv *priv;
623 struct net_device *netdev;
624
625 if (WARN_ON(!context))
626 return;
627
628 priv = context->priv;
629 netdev = priv->netdev;
630
631 kfree(urb->transfer_buffer);
632
633 if (!netif_device_present(netdev))
634 return;
635
636 if (urb->status)
637 netdev_info(netdev, "Tx URB aborted (%d)\n", urb->status);
638 }
639
kvaser_usb_start_xmit(struct sk_buff * skb,struct net_device * netdev)640 static netdev_tx_t kvaser_usb_start_xmit(struct sk_buff *skb,
641 struct net_device *netdev)
642 {
643 struct kvaser_usb_net_priv *priv = netdev_priv(netdev);
644 struct kvaser_usb *dev = priv->dev;
645 const struct kvaser_usb_dev_ops *ops = dev->driver_info->ops;
646 struct net_device_stats *stats = &netdev->stats;
647 struct kvaser_usb_tx_urb_context *context = NULL;
648 struct urb *urb;
649 void *buf;
650 int cmd_len = 0;
651 int err, ret = NETDEV_TX_OK;
652 unsigned int i;
653 unsigned long flags;
654
655 if (can_dev_dropped_skb(netdev, skb))
656 return NETDEV_TX_OK;
657
658 urb = usb_alloc_urb(0, GFP_ATOMIC);
659 if (!urb) {
660 stats->tx_dropped++;
661 dev_kfree_skb(skb);
662 return NETDEV_TX_OK;
663 }
664
665 spin_lock_irqsave(&priv->tx_contexts_lock, flags);
666 for (i = 0; i < dev->max_tx_urbs; i++) {
667 if (priv->tx_contexts[i].echo_index == dev->max_tx_urbs) {
668 context = &priv->tx_contexts[i];
669
670 context->echo_index = i;
671 ++priv->active_tx_contexts;
672 if (priv->active_tx_contexts >= (int)dev->max_tx_urbs)
673 netif_stop_queue(netdev);
674
675 break;
676 }
677 }
678 spin_unlock_irqrestore(&priv->tx_contexts_lock, flags);
679
680 /* This should never happen; it implies a flow control bug */
681 if (!context) {
682 netdev_warn(netdev, "cannot find free context\n");
683
684 ret = NETDEV_TX_BUSY;
685 goto freeurb;
686 }
687
688 buf = ops->dev_frame_to_cmd(priv, skb, &cmd_len, context->echo_index);
689 if (!buf) {
690 stats->tx_dropped++;
691 dev_kfree_skb(skb);
692 spin_lock_irqsave(&priv->tx_contexts_lock, flags);
693
694 context->echo_index = dev->max_tx_urbs;
695 --priv->active_tx_contexts;
696 netif_wake_queue(netdev);
697
698 spin_unlock_irqrestore(&priv->tx_contexts_lock, flags);
699 goto freeurb;
700 }
701
702 context->priv = priv;
703
704 can_put_echo_skb(skb, netdev, context->echo_index, 0);
705
706 usb_fill_bulk_urb(urb, dev->udev,
707 usb_sndbulkpipe(dev->udev,
708 dev->bulk_out->bEndpointAddress),
709 buf, cmd_len, kvaser_usb_write_bulk_callback,
710 context);
711 usb_anchor_urb(urb, &priv->tx_submitted);
712
713 err = usb_submit_urb(urb, GFP_ATOMIC);
714 if (unlikely(err)) {
715 spin_lock_irqsave(&priv->tx_contexts_lock, flags);
716
717 can_free_echo_skb(netdev, context->echo_index, NULL);
718 context->echo_index = dev->max_tx_urbs;
719 --priv->active_tx_contexts;
720 netif_wake_queue(netdev);
721
722 spin_unlock_irqrestore(&priv->tx_contexts_lock, flags);
723
724 usb_unanchor_urb(urb);
725 kfree(buf);
726
727 stats->tx_dropped++;
728
729 if (err == -ENODEV)
730 netif_device_detach(netdev);
731 else
732 netdev_warn(netdev, "Failed tx_urb %d\n", err);
733
734 goto freeurb;
735 }
736
737 ret = NETDEV_TX_OK;
738
739 freeurb:
740 usb_free_urb(urb);
741 return ret;
742 }
743
744 static const struct net_device_ops kvaser_usb_netdev_ops = {
745 .ndo_open = kvaser_usb_open,
746 .ndo_stop = kvaser_usb_close,
747 .ndo_start_xmit = kvaser_usb_start_xmit,
748 .ndo_change_mtu = can_change_mtu,
749 };
750
751 static const struct net_device_ops kvaser_usb_netdev_ops_hwts = {
752 .ndo_open = kvaser_usb_open,
753 .ndo_stop = kvaser_usb_close,
754 .ndo_eth_ioctl = can_eth_ioctl_hwts,
755 .ndo_start_xmit = kvaser_usb_start_xmit,
756 .ndo_change_mtu = can_change_mtu,
757 };
758
759 static const struct ethtool_ops kvaser_usb_ethtool_ops = {
760 .get_ts_info = ethtool_op_get_ts_info,
761 };
762
763 static const struct ethtool_ops kvaser_usb_ethtool_ops_hwts = {
764 .get_ts_info = can_ethtool_op_get_ts_info_hwts,
765 };
766
kvaser_usb_remove_interfaces(struct kvaser_usb * dev)767 static void kvaser_usb_remove_interfaces(struct kvaser_usb *dev)
768 {
769 const struct kvaser_usb_dev_ops *ops = dev->driver_info->ops;
770 int i;
771
772 for (i = 0; i < dev->nchannels; i++) {
773 if (!dev->nets[i])
774 continue;
775
776 unregister_candev(dev->nets[i]->netdev);
777 }
778
779 kvaser_usb_unlink_all_urbs(dev);
780
781 for (i = 0; i < dev->nchannels; i++) {
782 if (!dev->nets[i])
783 continue;
784
785 if (ops->dev_remove_channel)
786 ops->dev_remove_channel(dev->nets[i]);
787
788 free_candev(dev->nets[i]->netdev);
789 }
790 }
791
kvaser_usb_init_one(struct kvaser_usb * dev,int channel)792 static int kvaser_usb_init_one(struct kvaser_usb *dev, int channel)
793 {
794 struct net_device *netdev;
795 struct kvaser_usb_net_priv *priv;
796 const struct kvaser_usb_driver_info *driver_info = dev->driver_info;
797 const struct kvaser_usb_dev_ops *ops = driver_info->ops;
798 int err;
799
800 if (ops->dev_reset_chip) {
801 err = ops->dev_reset_chip(dev, channel);
802 if (err)
803 return err;
804 }
805
806 netdev = alloc_candev(struct_size(priv, tx_contexts, dev->max_tx_urbs),
807 dev->max_tx_urbs);
808 if (!netdev) {
809 dev_err(&dev->intf->dev, "Cannot alloc candev\n");
810 return -ENOMEM;
811 }
812
813 priv = netdev_priv(netdev);
814
815 init_usb_anchor(&priv->tx_submitted);
816 init_completion(&priv->start_comp);
817 init_completion(&priv->stop_comp);
818 init_completion(&priv->flush_comp);
819 init_completion(&priv->get_busparams_comp);
820 priv->can.ctrlmode_supported = CAN_CTRLMODE_CC_LEN8_DLC;
821
822 priv->dev = dev;
823 priv->netdev = netdev;
824 priv->channel = channel;
825
826 spin_lock_init(&priv->tx_contexts_lock);
827 kvaser_usb_reset_tx_urb_contexts(priv);
828
829 priv->can.state = CAN_STATE_STOPPED;
830 priv->can.clock.freq = dev->cfg->clock.freq;
831 priv->can.bittiming_const = dev->cfg->bittiming_const;
832 priv->can.do_set_bittiming = kvaser_usb_set_bittiming;
833 priv->can.do_set_mode = ops->dev_set_mode;
834 if ((driver_info->quirks & KVASER_USB_QUIRK_HAS_TXRX_ERRORS) ||
835 (priv->dev->card_data.capabilities & KVASER_USB_CAP_BERR_CAP))
836 priv->can.do_get_berr_counter = ops->dev_get_berr_counter;
837 if (driver_info->quirks & KVASER_USB_QUIRK_HAS_SILENT_MODE)
838 priv->can.ctrlmode_supported |= CAN_CTRLMODE_LISTENONLY;
839
840 priv->can.ctrlmode_supported |= dev->card_data.ctrlmode_supported;
841
842 if (priv->can.ctrlmode_supported & CAN_CTRLMODE_FD) {
843 priv->can.data_bittiming_const = dev->cfg->data_bittiming_const;
844 priv->can.do_set_data_bittiming = kvaser_usb_set_data_bittiming;
845 }
846
847 netdev->flags |= IFF_ECHO;
848
849 netdev->netdev_ops = &kvaser_usb_netdev_ops;
850 if (driver_info->quirks & KVASER_USB_QUIRK_HAS_HARDWARE_TIMESTAMP) {
851 netdev->netdev_ops = &kvaser_usb_netdev_ops_hwts;
852 netdev->ethtool_ops = &kvaser_usb_ethtool_ops_hwts;
853 } else {
854 netdev->netdev_ops = &kvaser_usb_netdev_ops;
855 netdev->ethtool_ops = &kvaser_usb_ethtool_ops;
856 }
857 SET_NETDEV_DEV(netdev, &dev->intf->dev);
858 netdev->dev_id = channel;
859
860 dev->nets[channel] = priv;
861
862 if (ops->dev_init_channel) {
863 err = ops->dev_init_channel(priv);
864 if (err)
865 goto err;
866 }
867
868 err = register_candev(netdev);
869 if (err) {
870 dev_err(&dev->intf->dev, "Failed to register CAN device\n");
871 goto err;
872 }
873
874 netdev_dbg(netdev, "device registered\n");
875
876 return 0;
877
878 err:
879 free_candev(netdev);
880 dev->nets[channel] = NULL;
881 return err;
882 }
883
kvaser_usb_probe(struct usb_interface * intf,const struct usb_device_id * id)884 static int kvaser_usb_probe(struct usb_interface *intf,
885 const struct usb_device_id *id)
886 {
887 struct kvaser_usb *dev;
888 int err;
889 int i;
890 const struct kvaser_usb_driver_info *driver_info;
891 const struct kvaser_usb_dev_ops *ops;
892
893 driver_info = (const struct kvaser_usb_driver_info *)id->driver_info;
894 if (!driver_info)
895 return -ENODEV;
896
897 dev = devm_kzalloc(&intf->dev, sizeof(*dev), GFP_KERNEL);
898 if (!dev)
899 return -ENOMEM;
900
901 dev->intf = intf;
902 dev->driver_info = driver_info;
903 ops = driver_info->ops;
904
905 err = ops->dev_setup_endpoints(dev);
906 if (err) {
907 dev_err(&intf->dev, "Cannot get usb endpoint(s)");
908 return err;
909 }
910
911 dev->udev = interface_to_usbdev(intf);
912
913 init_usb_anchor(&dev->rx_submitted);
914
915 usb_set_intfdata(intf, dev);
916
917 dev->card_data.ctrlmode_supported = 0;
918 dev->card_data.capabilities = 0;
919 err = ops->dev_init_card(dev);
920 if (err) {
921 dev_err(&intf->dev,
922 "Failed to initialize card, error %d\n", err);
923 return err;
924 }
925
926 err = ops->dev_get_software_info(dev);
927 if (err) {
928 dev_err(&intf->dev,
929 "Cannot get software info, error %d\n", err);
930 return err;
931 }
932
933 if (ops->dev_get_software_details) {
934 err = ops->dev_get_software_details(dev);
935 if (err) {
936 dev_err(&intf->dev,
937 "Cannot get software details, error %d\n", err);
938 return err;
939 }
940 }
941
942 if (WARN_ON(!dev->cfg))
943 return -ENODEV;
944
945 dev_dbg(&intf->dev, "Firmware version: %d.%d.%d\n",
946 ((dev->fw_version >> 24) & 0xff),
947 ((dev->fw_version >> 16) & 0xff),
948 (dev->fw_version & 0xffff));
949
950 dev_dbg(&intf->dev, "Max outstanding tx = %d URBs\n", dev->max_tx_urbs);
951
952 err = ops->dev_get_card_info(dev);
953 if (err) {
954 dev_err(&intf->dev, "Cannot get card info, error %d\n", err);
955 return err;
956 }
957
958 if (ops->dev_get_capabilities) {
959 err = ops->dev_get_capabilities(dev);
960 if (err) {
961 dev_err(&intf->dev,
962 "Cannot get capabilities, error %d\n", err);
963 kvaser_usb_remove_interfaces(dev);
964 return err;
965 }
966 }
967
968 for (i = 0; i < dev->nchannels; i++) {
969 err = kvaser_usb_init_one(dev, i);
970 if (err) {
971 kvaser_usb_remove_interfaces(dev);
972 return err;
973 }
974 }
975
976 return 0;
977 }
978
kvaser_usb_disconnect(struct usb_interface * intf)979 static void kvaser_usb_disconnect(struct usb_interface *intf)
980 {
981 struct kvaser_usb *dev = usb_get_intfdata(intf);
982
983 usb_set_intfdata(intf, NULL);
984
985 if (!dev)
986 return;
987
988 kvaser_usb_remove_interfaces(dev);
989 }
990
991 static struct usb_driver kvaser_usb_driver = {
992 .name = KBUILD_MODNAME,
993 .probe = kvaser_usb_probe,
994 .disconnect = kvaser_usb_disconnect,
995 .id_table = kvaser_usb_table,
996 };
997
998 module_usb_driver(kvaser_usb_driver);
999
1000 MODULE_AUTHOR("Olivier Sobrie <olivier@sobrie.be>");
1001 MODULE_AUTHOR("Kvaser AB <support@kvaser.com>");
1002 MODULE_DESCRIPTION("CAN driver for Kvaser CAN/USB devices");
1003 MODULE_LICENSE("GPL v2");
1004