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 #define USB_LEAF_V3_PRODUCT_ID 0x0117
92 #define USB_VINING_800_PRODUCT_ID 0x0119
93 #define USB_USBCAN_PRO_5XCAN_PRODUCT_ID 0x011A
94 #define USB_MINI_PCIE_1XCAN_PRODUCT_ID 0x011B
95
96 static const struct kvaser_usb_driver_info kvaser_usb_driver_info_hydra = {
97 .quirks = 0,
98 .ops = &kvaser_usb_hydra_dev_ops,
99 };
100
101 static const struct kvaser_usb_driver_info kvaser_usb_driver_info_usbcan = {
102 .quirks = KVASER_USB_QUIRK_HAS_TXRX_ERRORS |
103 KVASER_USB_QUIRK_HAS_SILENT_MODE,
104 .family = KVASER_USBCAN,
105 .ops = &kvaser_usb_leaf_dev_ops,
106 };
107
108 static const struct kvaser_usb_driver_info kvaser_usb_driver_info_leaf = {
109 .quirks = KVASER_USB_QUIRK_IGNORE_CLK_FREQ,
110 .family = KVASER_LEAF,
111 .ops = &kvaser_usb_leaf_dev_ops,
112 };
113
114 static const struct kvaser_usb_driver_info kvaser_usb_driver_info_leaf_err = {
115 .quirks = KVASER_USB_QUIRK_HAS_TXRX_ERRORS |
116 KVASER_USB_QUIRK_IGNORE_CLK_FREQ,
117 .family = KVASER_LEAF,
118 .ops = &kvaser_usb_leaf_dev_ops,
119 };
120
121 static const struct kvaser_usb_driver_info kvaser_usb_driver_info_leaf_err_listen = {
122 .quirks = KVASER_USB_QUIRK_HAS_TXRX_ERRORS |
123 KVASER_USB_QUIRK_HAS_SILENT_MODE |
124 KVASER_USB_QUIRK_IGNORE_CLK_FREQ,
125 .family = KVASER_LEAF,
126 .ops = &kvaser_usb_leaf_dev_ops,
127 };
128
129 static const struct kvaser_usb_driver_info kvaser_usb_driver_info_leafimx = {
130 .quirks = 0,
131 .family = KVASER_LEAF,
132 .ops = &kvaser_usb_leaf_dev_ops,
133 };
134
135 static const struct usb_device_id kvaser_usb_table[] = {
136 /* Leaf M32C USB product IDs */
137 { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_DEVEL_PRODUCT_ID),
138 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_leaf },
139 { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_LITE_PRODUCT_ID),
140 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_leaf },
141 { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_PRO_PRODUCT_ID),
142 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_leaf_err_listen },
143 { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_SPRO_PRODUCT_ID),
144 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_leaf_err_listen },
145 { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_PRO_LS_PRODUCT_ID),
146 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_leaf_err_listen },
147 { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_PRO_SWC_PRODUCT_ID),
148 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_leaf_err_listen },
149 { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_PRO_LIN_PRODUCT_ID),
150 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_leaf_err_listen },
151 { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_SPRO_LS_PRODUCT_ID),
152 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_leaf_err_listen },
153 { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_SPRO_SWC_PRODUCT_ID),
154 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_leaf_err_listen },
155 { USB_DEVICE(KVASER_VENDOR_ID, USB_MEMO2_DEVEL_PRODUCT_ID),
156 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_leaf_err_listen },
157 { USB_DEVICE(KVASER_VENDOR_ID, USB_MEMO2_HSHS_PRODUCT_ID),
158 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_leaf_err_listen },
159 { USB_DEVICE(KVASER_VENDOR_ID, USB_UPRO_HSHS_PRODUCT_ID),
160 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_leaf_err },
161 { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_LITE_GI_PRODUCT_ID),
162 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_leaf },
163 { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_PRO_OBDII_PRODUCT_ID),
164 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_leaf_err_listen },
165 { USB_DEVICE(KVASER_VENDOR_ID, USB_MEMO2_HSLS_PRODUCT_ID),
166 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_leaf_err },
167 { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_LITE_CH_PRODUCT_ID),
168 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_leaf_err },
169 { USB_DEVICE(KVASER_VENDOR_ID, USB_BLACKBIRD_SPRO_PRODUCT_ID),
170 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_leaf_err },
171 { USB_DEVICE(KVASER_VENDOR_ID, USB_OEM_MERCURY_PRODUCT_ID),
172 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_leaf_err },
173 { USB_DEVICE(KVASER_VENDOR_ID, USB_OEM_LEAF_PRODUCT_ID),
174 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_leaf_err },
175 { USB_DEVICE(KVASER_VENDOR_ID, USB_CAN_R_PRODUCT_ID),
176 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_leaf_err },
177
178 /* Leaf i.MX28 USB product IDs */
179 { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_LITE_V2_PRODUCT_ID),
180 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_leafimx },
181 { USB_DEVICE(KVASER_VENDOR_ID, USB_MINI_PCIE_HS_PRODUCT_ID),
182 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_leafimx },
183 { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_LIGHT_HS_V2_OEM_PRODUCT_ID),
184 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_leafimx },
185 { USB_DEVICE(KVASER_VENDOR_ID, USB_USBCAN_LIGHT_2HS_PRODUCT_ID),
186 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_leafimx },
187 { USB_DEVICE(KVASER_VENDOR_ID, USB_MINI_PCIE_2HS_PRODUCT_ID),
188 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_leafimx },
189 { USB_DEVICE(KVASER_VENDOR_ID, USB_USBCAN_R_V2_PRODUCT_ID),
190 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_leafimx },
191 { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_LIGHT_R_V2_PRODUCT_ID),
192 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_leafimx },
193 { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_LIGHT_HS_V2_OEM2_PRODUCT_ID),
194 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_leafimx },
195
196 /* USBCANII USB product IDs */
197 { USB_DEVICE(KVASER_VENDOR_ID, USB_USBCAN2_PRODUCT_ID),
198 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_usbcan },
199 { USB_DEVICE(KVASER_VENDOR_ID, USB_USBCAN_REVB_PRODUCT_ID),
200 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_usbcan },
201 { USB_DEVICE(KVASER_VENDOR_ID, USB_MEMORATOR_PRODUCT_ID),
202 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_usbcan },
203 { USB_DEVICE(KVASER_VENDOR_ID, USB_VCI2_PRODUCT_ID),
204 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_usbcan },
205
206 /* Minihydra USB product IDs */
207 { USB_DEVICE(KVASER_VENDOR_ID, USB_BLACKBIRD_V2_PRODUCT_ID),
208 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_hydra },
209 { USB_DEVICE(KVASER_VENDOR_ID, USB_MEMO_PRO_5HS_PRODUCT_ID),
210 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_hydra },
211 { USB_DEVICE(KVASER_VENDOR_ID, USB_USBCAN_PRO_5HS_PRODUCT_ID),
212 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_hydra },
213 { USB_DEVICE(KVASER_VENDOR_ID, USB_USBCAN_LIGHT_4HS_PRODUCT_ID),
214 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_hydra },
215 { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_PRO_HS_V2_PRODUCT_ID),
216 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_hydra },
217 { USB_DEVICE(KVASER_VENDOR_ID, USB_USBCAN_PRO_2HS_V2_PRODUCT_ID),
218 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_hydra },
219 { USB_DEVICE(KVASER_VENDOR_ID, USB_MEMO_2HS_PRODUCT_ID),
220 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_hydra },
221 { USB_DEVICE(KVASER_VENDOR_ID, USB_MEMO_PRO_2HS_V2_PRODUCT_ID),
222 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_hydra },
223 { USB_DEVICE(KVASER_VENDOR_ID, USB_HYBRID_2CANLIN_PRODUCT_ID),
224 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_hydra },
225 { USB_DEVICE(KVASER_VENDOR_ID, USB_ATI_USBCAN_PRO_2HS_V2_PRODUCT_ID),
226 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_hydra },
227 { USB_DEVICE(KVASER_VENDOR_ID, USB_ATI_MEMO_PRO_2HS_V2_PRODUCT_ID),
228 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_hydra },
229 { USB_DEVICE(KVASER_VENDOR_ID, USB_HYBRID_PRO_2CANLIN_PRODUCT_ID),
230 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_hydra },
231 { USB_DEVICE(KVASER_VENDOR_ID, USB_U100_PRODUCT_ID),
232 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_hydra },
233 { USB_DEVICE(KVASER_VENDOR_ID, USB_U100P_PRODUCT_ID),
234 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_hydra },
235 { USB_DEVICE(KVASER_VENDOR_ID, USB_U100S_PRODUCT_ID),
236 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_hydra },
237 { USB_DEVICE(KVASER_VENDOR_ID, USB_USBCAN_PRO_4HS_PRODUCT_ID),
238 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_hydra },
239 { USB_DEVICE(KVASER_VENDOR_ID, USB_HYBRID_CANLIN_PRODUCT_ID),
240 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_hydra },
241 { USB_DEVICE(KVASER_VENDOR_ID, USB_HYBRID_PRO_CANLIN_PRODUCT_ID),
242 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_hydra },
243 { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_V3_PRODUCT_ID),
244 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_hydra },
245 { USB_DEVICE(KVASER_VENDOR_ID, USB_VINING_800_PRODUCT_ID),
246 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_hydra },
247 { USB_DEVICE(KVASER_VENDOR_ID, USB_USBCAN_PRO_5XCAN_PRODUCT_ID),
248 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_hydra },
249 { USB_DEVICE(KVASER_VENDOR_ID, USB_MINI_PCIE_1XCAN_PRODUCT_ID),
250 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_hydra },
251 { }
252 };
253 MODULE_DEVICE_TABLE(usb, kvaser_usb_table);
254
kvaser_usb_send_cmd(const struct kvaser_usb * dev,void * cmd,int len)255 int kvaser_usb_send_cmd(const struct kvaser_usb *dev, void *cmd, int len)
256 {
257 return usb_bulk_msg(dev->udev,
258 usb_sndbulkpipe(dev->udev,
259 dev->bulk_out->bEndpointAddress),
260 cmd, len, NULL, KVASER_USB_TIMEOUT);
261 }
262
kvaser_usb_recv_cmd(const struct kvaser_usb * dev,void * cmd,int len,int * actual_len)263 int kvaser_usb_recv_cmd(const struct kvaser_usb *dev, void *cmd, int len,
264 int *actual_len)
265 {
266 return usb_bulk_msg(dev->udev,
267 usb_rcvbulkpipe(dev->udev,
268 dev->bulk_in->bEndpointAddress),
269 cmd, len, actual_len, KVASER_USB_TIMEOUT);
270 }
271
kvaser_usb_send_cmd_callback(struct urb * urb)272 static void kvaser_usb_send_cmd_callback(struct urb *urb)
273 {
274 struct net_device *netdev = urb->context;
275
276 kfree(urb->transfer_buffer);
277
278 if (urb->status)
279 netdev_warn(netdev, "urb status received: %d\n", urb->status);
280 }
281
kvaser_usb_send_cmd_async(struct kvaser_usb_net_priv * priv,void * cmd,int len)282 int kvaser_usb_send_cmd_async(struct kvaser_usb_net_priv *priv, void *cmd,
283 int len)
284 {
285 struct kvaser_usb *dev = priv->dev;
286 struct net_device *netdev = priv->netdev;
287 struct urb *urb;
288 int err;
289
290 urb = usb_alloc_urb(0, GFP_ATOMIC);
291 if (!urb)
292 return -ENOMEM;
293
294 usb_fill_bulk_urb(urb, dev->udev,
295 usb_sndbulkpipe(dev->udev,
296 dev->bulk_out->bEndpointAddress),
297 cmd, len, kvaser_usb_send_cmd_callback, netdev);
298 usb_anchor_urb(urb, &priv->tx_submitted);
299
300 err = usb_submit_urb(urb, GFP_ATOMIC);
301 if (err) {
302 netdev_err(netdev, "Error transmitting URB\n");
303 usb_unanchor_urb(urb);
304 }
305 usb_free_urb(urb);
306
307 return err;
308 }
309
kvaser_usb_can_rx_over_error(struct net_device * netdev)310 int kvaser_usb_can_rx_over_error(struct net_device *netdev)
311 {
312 struct net_device_stats *stats = &netdev->stats;
313 struct can_frame *cf;
314 struct sk_buff *skb;
315
316 stats->rx_over_errors++;
317 stats->rx_errors++;
318
319 skb = alloc_can_err_skb(netdev, &cf);
320 if (!skb) {
321 stats->rx_dropped++;
322 netdev_warn(netdev, "No memory left for err_skb\n");
323 return -ENOMEM;
324 }
325
326 cf->can_id |= CAN_ERR_CRTL;
327 cf->data[1] = CAN_ERR_CRTL_RX_OVERFLOW;
328
329 netif_rx(skb);
330
331 return 0;
332 }
333
kvaser_usb_read_bulk_callback(struct urb * urb)334 static void kvaser_usb_read_bulk_callback(struct urb *urb)
335 {
336 struct kvaser_usb *dev = urb->context;
337 const struct kvaser_usb_dev_ops *ops = dev->driver_info->ops;
338 int err;
339 unsigned int i;
340
341 switch (urb->status) {
342 case 0:
343 break;
344 case -ENOENT:
345 case -EPIPE:
346 case -EPROTO:
347 case -ESHUTDOWN:
348 return;
349 default:
350 dev_info(&dev->intf->dev, "Rx URB aborted (%d)\n", urb->status);
351 goto resubmit_urb;
352 }
353
354 ops->dev_read_bulk_callback(dev, urb->transfer_buffer,
355 urb->actual_length);
356
357 resubmit_urb:
358 usb_fill_bulk_urb(urb, dev->udev,
359 usb_rcvbulkpipe(dev->udev,
360 dev->bulk_in->bEndpointAddress),
361 urb->transfer_buffer, KVASER_USB_RX_BUFFER_SIZE,
362 kvaser_usb_read_bulk_callback, dev);
363
364 err = usb_submit_urb(urb, GFP_ATOMIC);
365 if (err == -ENODEV) {
366 for (i = 0; i < dev->nchannels; i++) {
367 struct kvaser_usb_net_priv *priv;
368
369 priv = dev->nets[i];
370 if (!priv)
371 continue;
372
373 netif_device_detach(priv->netdev);
374 }
375 } else if (err) {
376 dev_err(&dev->intf->dev,
377 "Failed resubmitting read bulk urb: %d\n", err);
378 }
379 }
380
kvaser_usb_setup_rx_urbs(struct kvaser_usb * dev)381 static int kvaser_usb_setup_rx_urbs(struct kvaser_usb *dev)
382 {
383 int i, err = 0;
384
385 if (dev->rxinitdone)
386 return 0;
387
388 for (i = 0; i < KVASER_USB_MAX_RX_URBS; i++) {
389 struct urb *urb = NULL;
390 u8 *buf = NULL;
391 dma_addr_t buf_dma;
392
393 urb = usb_alloc_urb(0, GFP_KERNEL);
394 if (!urb) {
395 err = -ENOMEM;
396 break;
397 }
398
399 buf = usb_alloc_coherent(dev->udev, KVASER_USB_RX_BUFFER_SIZE,
400 GFP_KERNEL, &buf_dma);
401 if (!buf) {
402 dev_warn(&dev->intf->dev,
403 "No memory left for USB buffer\n");
404 usb_free_urb(urb);
405 err = -ENOMEM;
406 break;
407 }
408
409 usb_fill_bulk_urb(urb, dev->udev,
410 usb_rcvbulkpipe
411 (dev->udev,
412 dev->bulk_in->bEndpointAddress),
413 buf, KVASER_USB_RX_BUFFER_SIZE,
414 kvaser_usb_read_bulk_callback, dev);
415 urb->transfer_dma = buf_dma;
416 urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
417 usb_anchor_urb(urb, &dev->rx_submitted);
418
419 err = usb_submit_urb(urb, GFP_KERNEL);
420 if (err) {
421 usb_unanchor_urb(urb);
422 usb_free_coherent(dev->udev,
423 KVASER_USB_RX_BUFFER_SIZE, buf,
424 buf_dma);
425 usb_free_urb(urb);
426 break;
427 }
428
429 dev->rxbuf[i] = buf;
430 dev->rxbuf_dma[i] = buf_dma;
431
432 usb_free_urb(urb);
433 }
434
435 if (i == 0) {
436 dev_warn(&dev->intf->dev, "Cannot setup read URBs, error %d\n",
437 err);
438 return err;
439 } else if (i < KVASER_USB_MAX_RX_URBS) {
440 dev_warn(&dev->intf->dev, "RX performances may be slow\n");
441 }
442
443 dev->rxinitdone = true;
444
445 return 0;
446 }
447
kvaser_usb_open(struct net_device * netdev)448 static int kvaser_usb_open(struct net_device *netdev)
449 {
450 struct kvaser_usb_net_priv *priv = netdev_priv(netdev);
451 struct kvaser_usb *dev = priv->dev;
452 const struct kvaser_usb_dev_ops *ops = dev->driver_info->ops;
453 int err;
454
455 err = open_candev(netdev);
456 if (err)
457 return err;
458
459 err = ops->dev_set_opt_mode(priv);
460 if (err)
461 goto error;
462
463 err = ops->dev_start_chip(priv);
464 if (err) {
465 netdev_warn(netdev, "Cannot start device, error %d\n", err);
466 goto error;
467 }
468
469 priv->can.state = CAN_STATE_ERROR_ACTIVE;
470
471 return 0;
472
473 error:
474 close_candev(netdev);
475 return err;
476 }
477
kvaser_usb_reset_tx_urb_contexts(struct kvaser_usb_net_priv * priv)478 static void kvaser_usb_reset_tx_urb_contexts(struct kvaser_usb_net_priv *priv)
479 {
480 int i, max_tx_urbs;
481
482 max_tx_urbs = priv->dev->max_tx_urbs;
483
484 priv->active_tx_contexts = 0;
485 for (i = 0; i < max_tx_urbs; i++)
486 priv->tx_contexts[i].echo_index = max_tx_urbs;
487 }
488
489 /* This method might sleep. Do not call it in the atomic context
490 * of URB completions.
491 */
kvaser_usb_unlink_tx_urbs(struct kvaser_usb_net_priv * priv)492 void kvaser_usb_unlink_tx_urbs(struct kvaser_usb_net_priv *priv)
493 {
494 usb_kill_anchored_urbs(&priv->tx_submitted);
495 kvaser_usb_reset_tx_urb_contexts(priv);
496 }
497
kvaser_usb_unlink_all_urbs(struct kvaser_usb * dev)498 static void kvaser_usb_unlink_all_urbs(struct kvaser_usb *dev)
499 {
500 int i;
501
502 usb_kill_anchored_urbs(&dev->rx_submitted);
503
504 for (i = 0; i < KVASER_USB_MAX_RX_URBS; i++)
505 usb_free_coherent(dev->udev, KVASER_USB_RX_BUFFER_SIZE,
506 dev->rxbuf[i], dev->rxbuf_dma[i]);
507
508 for (i = 0; i < dev->nchannels; i++) {
509 struct kvaser_usb_net_priv *priv = dev->nets[i];
510
511 if (priv)
512 kvaser_usb_unlink_tx_urbs(priv);
513 }
514 }
515
kvaser_usb_close(struct net_device * netdev)516 static int kvaser_usb_close(struct net_device *netdev)
517 {
518 struct kvaser_usb_net_priv *priv = netdev_priv(netdev);
519 struct kvaser_usb *dev = priv->dev;
520 const struct kvaser_usb_dev_ops *ops = dev->driver_info->ops;
521 int err;
522
523 netif_stop_queue(netdev);
524
525 err = ops->dev_flush_queue(priv);
526 if (err)
527 netdev_warn(netdev, "Cannot flush queue, error %d\n", err);
528
529 if (ops->dev_reset_chip) {
530 err = ops->dev_reset_chip(dev, priv->channel);
531 if (err)
532 netdev_warn(netdev, "Cannot reset card, error %d\n",
533 err);
534 }
535
536 err = ops->dev_stop_chip(priv);
537 if (err)
538 netdev_warn(netdev, "Cannot stop device, error %d\n", err);
539
540 /* reset tx contexts */
541 kvaser_usb_unlink_tx_urbs(priv);
542
543 priv->can.state = CAN_STATE_STOPPED;
544 close_candev(priv->netdev);
545
546 return 0;
547 }
548
kvaser_usb_set_bittiming(struct net_device * netdev)549 static int kvaser_usb_set_bittiming(struct net_device *netdev)
550 {
551 struct kvaser_usb_net_priv *priv = netdev_priv(netdev);
552 struct kvaser_usb *dev = priv->dev;
553 const struct kvaser_usb_dev_ops *ops = dev->driver_info->ops;
554 struct can_bittiming *bt = &priv->can.bittiming;
555 struct kvaser_usb_busparams busparams;
556 int tseg1 = bt->prop_seg + bt->phase_seg1;
557 int tseg2 = bt->phase_seg2;
558 int sjw = bt->sjw;
559 int err;
560
561 busparams.bitrate = cpu_to_le32(bt->bitrate);
562 busparams.sjw = (u8)sjw;
563 busparams.tseg1 = (u8)tseg1;
564 busparams.tseg2 = (u8)tseg2;
565 if (priv->can.ctrlmode & CAN_CTRLMODE_3_SAMPLES)
566 busparams.nsamples = 3;
567 else
568 busparams.nsamples = 1;
569
570 err = ops->dev_set_bittiming(netdev, &busparams);
571 if (err)
572 return err;
573
574 err = kvaser_usb_setup_rx_urbs(priv->dev);
575 if (err)
576 return err;
577
578 err = ops->dev_get_busparams(priv);
579 if (err) {
580 /* Treat EOPNOTSUPP as success */
581 if (err == -EOPNOTSUPP)
582 err = 0;
583 return err;
584 }
585
586 if (memcmp(&busparams, &priv->busparams_nominal,
587 sizeof(priv->busparams_nominal)) != 0)
588 err = -EINVAL;
589
590 return err;
591 }
592
kvaser_usb_set_data_bittiming(struct net_device * netdev)593 static int kvaser_usb_set_data_bittiming(struct net_device *netdev)
594 {
595 struct kvaser_usb_net_priv *priv = netdev_priv(netdev);
596 struct kvaser_usb *dev = priv->dev;
597 const struct kvaser_usb_dev_ops *ops = dev->driver_info->ops;
598 struct can_bittiming *dbt = &priv->can.fd.data_bittiming;
599 struct kvaser_usb_busparams busparams;
600 int tseg1 = dbt->prop_seg + dbt->phase_seg1;
601 int tseg2 = dbt->phase_seg2;
602 int sjw = dbt->sjw;
603 int err;
604
605 if (!ops->dev_set_data_bittiming ||
606 !ops->dev_get_data_busparams)
607 return -EOPNOTSUPP;
608
609 busparams.bitrate = cpu_to_le32(dbt->bitrate);
610 busparams.sjw = (u8)sjw;
611 busparams.tseg1 = (u8)tseg1;
612 busparams.tseg2 = (u8)tseg2;
613 busparams.nsamples = 1;
614
615 err = ops->dev_set_data_bittiming(netdev, &busparams);
616 if (err)
617 return err;
618
619 err = kvaser_usb_setup_rx_urbs(priv->dev);
620 if (err)
621 return err;
622
623 err = ops->dev_get_data_busparams(priv);
624 if (err)
625 return err;
626
627 if (memcmp(&busparams, &priv->busparams_data,
628 sizeof(priv->busparams_data)) != 0)
629 err = -EINVAL;
630
631 return err;
632 }
633
kvaser_usb_write_bulk_callback(struct urb * urb)634 static void kvaser_usb_write_bulk_callback(struct urb *urb)
635 {
636 struct kvaser_usb_tx_urb_context *context = urb->context;
637 struct kvaser_usb_net_priv *priv;
638 struct net_device *netdev;
639
640 if (WARN_ON(!context))
641 return;
642
643 priv = context->priv;
644 netdev = priv->netdev;
645
646 kfree(urb->transfer_buffer);
647
648 if (!netif_device_present(netdev))
649 return;
650
651 if (urb->status)
652 netdev_info(netdev, "Tx URB aborted (%d)\n", urb->status);
653 }
654
kvaser_usb_start_xmit(struct sk_buff * skb,struct net_device * netdev)655 static netdev_tx_t kvaser_usb_start_xmit(struct sk_buff *skb,
656 struct net_device *netdev)
657 {
658 struct kvaser_usb_net_priv *priv = netdev_priv(netdev);
659 struct kvaser_usb *dev = priv->dev;
660 const struct kvaser_usb_dev_ops *ops = dev->driver_info->ops;
661 struct net_device_stats *stats = &netdev->stats;
662 struct kvaser_usb_tx_urb_context *context = NULL;
663 struct urb *urb;
664 void *buf;
665 int cmd_len = 0;
666 int err, ret = NETDEV_TX_OK;
667 unsigned int i;
668 unsigned long flags;
669
670 if (can_dev_dropped_skb(netdev, skb))
671 return NETDEV_TX_OK;
672
673 urb = usb_alloc_urb(0, GFP_ATOMIC);
674 if (!urb) {
675 stats->tx_dropped++;
676 dev_kfree_skb(skb);
677 return NETDEV_TX_OK;
678 }
679
680 spin_lock_irqsave(&priv->tx_contexts_lock, flags);
681 for (i = 0; i < dev->max_tx_urbs; i++) {
682 if (priv->tx_contexts[i].echo_index == dev->max_tx_urbs) {
683 context = &priv->tx_contexts[i];
684
685 context->echo_index = i;
686 ++priv->active_tx_contexts;
687 if (priv->active_tx_contexts >= (int)dev->max_tx_urbs)
688 netif_stop_queue(netdev);
689
690 break;
691 }
692 }
693 spin_unlock_irqrestore(&priv->tx_contexts_lock, flags);
694
695 /* This should never happen; it implies a flow control bug */
696 if (!context) {
697 netdev_warn(netdev, "cannot find free context\n");
698
699 ret = NETDEV_TX_BUSY;
700 goto freeurb;
701 }
702
703 buf = ops->dev_frame_to_cmd(priv, skb, &cmd_len, context->echo_index);
704 if (!buf) {
705 stats->tx_dropped++;
706 dev_kfree_skb(skb);
707 spin_lock_irqsave(&priv->tx_contexts_lock, flags);
708
709 context->echo_index = dev->max_tx_urbs;
710 --priv->active_tx_contexts;
711 netif_wake_queue(netdev);
712
713 spin_unlock_irqrestore(&priv->tx_contexts_lock, flags);
714 goto freeurb;
715 }
716
717 context->priv = priv;
718
719 can_put_echo_skb(skb, netdev, context->echo_index, 0);
720
721 usb_fill_bulk_urb(urb, dev->udev,
722 usb_sndbulkpipe(dev->udev,
723 dev->bulk_out->bEndpointAddress),
724 buf, cmd_len, kvaser_usb_write_bulk_callback,
725 context);
726 usb_anchor_urb(urb, &priv->tx_submitted);
727
728 err = usb_submit_urb(urb, GFP_ATOMIC);
729 if (unlikely(err)) {
730 spin_lock_irqsave(&priv->tx_contexts_lock, flags);
731
732 can_free_echo_skb(netdev, context->echo_index, NULL);
733 context->echo_index = dev->max_tx_urbs;
734 --priv->active_tx_contexts;
735 netif_wake_queue(netdev);
736
737 spin_unlock_irqrestore(&priv->tx_contexts_lock, flags);
738
739 usb_unanchor_urb(urb);
740 kfree(buf);
741
742 stats->tx_dropped++;
743
744 if (err == -ENODEV)
745 netif_device_detach(netdev);
746 else
747 netdev_warn(netdev, "Failed tx_urb %d\n", err);
748
749 goto freeurb;
750 }
751
752 ret = NETDEV_TX_OK;
753
754 freeurb:
755 usb_free_urb(urb);
756 return ret;
757 }
758
kvaser_usb_set_phys_id(struct net_device * netdev,enum ethtool_phys_id_state state)759 static int kvaser_usb_set_phys_id(struct net_device *netdev,
760 enum ethtool_phys_id_state state)
761 {
762 struct kvaser_usb_net_priv *priv = netdev_priv(netdev);
763 const struct kvaser_usb_dev_ops *ops = priv->dev->driver_info->ops;
764
765 switch (state) {
766 case ETHTOOL_ID_ACTIVE:
767 return 3; /* 3 On/Off cycles per second */
768
769 case ETHTOOL_ID_ON:
770 return ops->dev_set_led(priv, KVASER_USB_LED_ON, 1000);
771
772 case ETHTOOL_ID_OFF:
773 return ops->dev_set_led(priv, KVASER_USB_LED_OFF, 1000);
774
775 case ETHTOOL_ID_INACTIVE:
776 /* Turn LED off and restore standard function after 1ms */
777 return ops->dev_set_led(priv, KVASER_USB_LED_OFF, 1);
778
779 default:
780 return -EINVAL;
781 }
782 }
783
784 static const struct net_device_ops kvaser_usb_netdev_ops = {
785 .ndo_open = kvaser_usb_open,
786 .ndo_stop = kvaser_usb_close,
787 .ndo_eth_ioctl = can_eth_ioctl_hwts,
788 .ndo_start_xmit = kvaser_usb_start_xmit,
789 .ndo_change_mtu = can_change_mtu,
790 };
791
792 static const struct ethtool_ops kvaser_usb_ethtool_ops = {
793 .get_ts_info = can_ethtool_op_get_ts_info_hwts,
794 .set_phys_id = kvaser_usb_set_phys_id,
795 };
796
kvaser_usb_remove_interfaces(struct kvaser_usb * dev)797 static void kvaser_usb_remove_interfaces(struct kvaser_usb *dev)
798 {
799 const struct kvaser_usb_dev_ops *ops = dev->driver_info->ops;
800 int i;
801 struct kvaser_usb_net_priv *priv;
802
803 for (i = 0; i < dev->nchannels; i++) {
804 priv = dev->nets[i];
805 if (!priv)
806 continue;
807
808 unregister_candev(priv->netdev);
809 }
810
811 kvaser_usb_unlink_all_urbs(dev);
812
813 for (i = 0; i < dev->nchannels; i++) {
814 priv = dev->nets[i];
815 if (!priv)
816 continue;
817
818 if (ops->dev_remove_channel)
819 ops->dev_remove_channel(priv);
820
821 kvaser_usb_devlink_port_unregister(priv);
822 free_candev(priv->netdev);
823 }
824 }
825
kvaser_usb_init_one(struct kvaser_usb * dev,int channel)826 static int kvaser_usb_init_one(struct kvaser_usb *dev, int channel)
827 {
828 struct net_device *netdev;
829 struct kvaser_usb_net_priv *priv;
830 const struct kvaser_usb_driver_info *driver_info = dev->driver_info;
831 const struct kvaser_usb_dev_ops *ops = driver_info->ops;
832 int err;
833
834 if (ops->dev_reset_chip) {
835 err = ops->dev_reset_chip(dev, channel);
836 if (err)
837 return err;
838 }
839
840 netdev = alloc_candev(struct_size(priv, tx_contexts, dev->max_tx_urbs),
841 dev->max_tx_urbs);
842 if (!netdev) {
843 dev_err(&dev->intf->dev, "Cannot alloc candev\n");
844 return -ENOMEM;
845 }
846
847 priv = netdev_priv(netdev);
848
849 init_usb_anchor(&priv->tx_submitted);
850 init_completion(&priv->start_comp);
851 init_completion(&priv->stop_comp);
852 init_completion(&priv->flush_comp);
853 init_completion(&priv->get_busparams_comp);
854 priv->can.ctrlmode_supported = CAN_CTRLMODE_CC_LEN8_DLC |
855 CAN_CTRLMODE_BERR_REPORTING;
856
857 priv->dev = dev;
858 priv->netdev = netdev;
859 priv->channel = channel;
860
861 spin_lock_init(&priv->tx_contexts_lock);
862 kvaser_usb_reset_tx_urb_contexts(priv);
863
864 priv->can.state = CAN_STATE_STOPPED;
865 priv->can.clock.freq = dev->cfg->clock.freq;
866 priv->can.bittiming_const = dev->cfg->bittiming_const;
867 priv->can.do_set_bittiming = kvaser_usb_set_bittiming;
868 priv->can.do_set_mode = ops->dev_set_mode;
869 if ((driver_info->quirks & KVASER_USB_QUIRK_HAS_TXRX_ERRORS) ||
870 (priv->dev->card_data.capabilities & KVASER_USB_CAP_BERR_CAP))
871 priv->can.do_get_berr_counter = ops->dev_get_berr_counter;
872 if (driver_info->quirks & KVASER_USB_QUIRK_HAS_SILENT_MODE)
873 priv->can.ctrlmode_supported |= CAN_CTRLMODE_LISTENONLY;
874
875 priv->can.ctrlmode_supported |= dev->card_data.ctrlmode_supported;
876
877 if (priv->can.ctrlmode_supported & CAN_CTRLMODE_FD) {
878 priv->can.fd.data_bittiming_const = dev->cfg->data_bittiming_const;
879 priv->can.fd.do_set_data_bittiming = kvaser_usb_set_data_bittiming;
880 }
881
882 netdev->flags |= IFF_ECHO;
883
884 netdev->netdev_ops = &kvaser_usb_netdev_ops;
885 netdev->ethtool_ops = &kvaser_usb_ethtool_ops;
886 SET_NETDEV_DEV(netdev, &dev->intf->dev);
887 netdev->dev_id = channel;
888 netdev->dev_port = channel;
889
890 dev->nets[channel] = priv;
891
892 if (ops->dev_init_channel) {
893 err = ops->dev_init_channel(priv);
894 if (err)
895 goto candev_free;
896 }
897
898 err = kvaser_usb_devlink_port_register(priv);
899 if (err) {
900 dev_err(&dev->intf->dev, "Failed to register devlink port\n");
901 goto candev_free;
902 }
903
904 err = register_candev(netdev);
905 if (err) {
906 dev_err(&dev->intf->dev, "Failed to register CAN device\n");
907 goto unregister_devlink_port;
908 }
909
910 netdev_dbg(netdev, "device registered\n");
911
912 return 0;
913
914 unregister_devlink_port:
915 kvaser_usb_devlink_port_unregister(priv);
916 candev_free:
917 free_candev(netdev);
918 dev->nets[channel] = NULL;
919 return err;
920 }
921
kvaser_usb_probe(struct usb_interface * intf,const struct usb_device_id * id)922 static int kvaser_usb_probe(struct usb_interface *intf,
923 const struct usb_device_id *id)
924 {
925 struct kvaser_usb *dev;
926 struct devlink *devlink;
927 int err;
928 int i;
929 const struct kvaser_usb_driver_info *driver_info;
930 const struct kvaser_usb_dev_ops *ops;
931
932 driver_info = (const struct kvaser_usb_driver_info *)id->driver_info;
933 if (!driver_info)
934 return -ENODEV;
935
936 devlink = devlink_alloc(&kvaser_usb_devlink_ops, sizeof(*dev), &intf->dev);
937 if (!devlink)
938 return -ENOMEM;
939
940 dev = devlink_priv(devlink);
941 dev->intf = intf;
942 dev->driver_info = driver_info;
943 ops = driver_info->ops;
944
945 err = ops->dev_setup_endpoints(dev);
946 if (err) {
947 dev_err_probe(&intf->dev, err, "Cannot get usb endpoint(s)");
948 goto free_devlink;
949 }
950
951 dev->udev = interface_to_usbdev(intf);
952
953 init_usb_anchor(&dev->rx_submitted);
954
955 usb_set_intfdata(intf, dev);
956
957 dev->card_data.ctrlmode_supported = 0;
958 dev->card_data.capabilities = 0;
959 err = ops->dev_init_card(dev);
960 if (err) {
961 dev_err_probe(&intf->dev, err,
962 "Failed to initialize card\n");
963 goto free_devlink;
964 }
965
966 err = ops->dev_get_software_info(dev);
967 if (err) {
968 dev_err_probe(&intf->dev, err,
969 "Cannot get software info\n");
970 goto free_devlink;
971 }
972
973 if (ops->dev_get_software_details) {
974 err = ops->dev_get_software_details(dev);
975 if (err) {
976 dev_err_probe(&intf->dev, err,
977 "Cannot get software details\n");
978 goto free_devlink;
979 }
980 }
981
982 if (WARN_ON(!dev->cfg)) {
983 err = -ENODEV;
984 goto free_devlink;
985 }
986
987 dev_dbg(&intf->dev, "Max outstanding tx = %d URBs\n", dev->max_tx_urbs);
988
989 err = ops->dev_get_card_info(dev);
990 if (err) {
991 dev_err_probe(&intf->dev, err,
992 "Cannot get card info\n");
993 goto free_devlink;
994 }
995
996 if (ops->dev_get_capabilities) {
997 err = ops->dev_get_capabilities(dev);
998 if (err) {
999 dev_err_probe(&intf->dev, err,
1000 "Cannot get capabilities\n");
1001 goto remove_interfaces;
1002 }
1003 }
1004
1005 for (i = 0; i < dev->nchannels; i++) {
1006 err = kvaser_usb_init_one(dev, i);
1007 if (err)
1008 goto remove_interfaces;
1009 }
1010 devlink_register(devlink);
1011
1012 return 0;
1013
1014 remove_interfaces:
1015 kvaser_usb_remove_interfaces(dev);
1016 free_devlink:
1017 devlink_free(devlink);
1018
1019 return err;
1020 }
1021
kvaser_usb_disconnect(struct usb_interface * intf)1022 static void kvaser_usb_disconnect(struct usb_interface *intf)
1023 {
1024 struct kvaser_usb *dev = usb_get_intfdata(intf);
1025
1026 usb_set_intfdata(intf, NULL);
1027
1028 if (!dev)
1029 return;
1030
1031 kvaser_usb_remove_interfaces(dev);
1032 devlink_unregister(priv_to_devlink(dev));
1033 devlink_free(priv_to_devlink(dev));
1034 }
1035
1036 static struct usb_driver kvaser_usb_driver = {
1037 .name = KBUILD_MODNAME,
1038 .probe = kvaser_usb_probe,
1039 .disconnect = kvaser_usb_disconnect,
1040 .id_table = kvaser_usb_table,
1041 };
1042
1043 module_usb_driver(kvaser_usb_driver);
1044
1045 MODULE_AUTHOR("Olivier Sobrie <olivier@sobrie.be>");
1046 MODULE_AUTHOR("Kvaser AB <support@kvaser.com>");
1047 MODULE_DESCRIPTION("CAN driver for Kvaser CAN/USB devices");
1048 MODULE_LICENSE("GPL v2");
1049