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 usb_anchor_urb(urb, &dev->rx_submitted);
365
366 err = usb_submit_urb(urb, GFP_ATOMIC);
367 if (!err)
368 return;
369
370 usb_unanchor_urb(urb);
371
372 if (err == -ENODEV) {
373 for (i = 0; i < dev->nchannels; i++) {
374 struct kvaser_usb_net_priv *priv;
375
376 priv = dev->nets[i];
377 if (!priv)
378 continue;
379
380 netif_device_detach(priv->netdev);
381 }
382 } else {
383 dev_err(&dev->intf->dev,
384 "Failed resubmitting read bulk urb: %d\n", err);
385 }
386 }
387
kvaser_usb_setup_rx_urbs(struct kvaser_usb * dev)388 static int kvaser_usb_setup_rx_urbs(struct kvaser_usb *dev)
389 {
390 int i, err = 0;
391
392 if (dev->rxinitdone)
393 return 0;
394
395 for (i = 0; i < KVASER_USB_MAX_RX_URBS; i++) {
396 struct urb *urb = NULL;
397 u8 *buf = NULL;
398 dma_addr_t buf_dma;
399
400 urb = usb_alloc_urb(0, GFP_KERNEL);
401 if (!urb) {
402 err = -ENOMEM;
403 break;
404 }
405
406 buf = usb_alloc_coherent(dev->udev, KVASER_USB_RX_BUFFER_SIZE,
407 GFP_KERNEL, &buf_dma);
408 if (!buf) {
409 dev_warn(&dev->intf->dev,
410 "No memory left for USB buffer\n");
411 usb_free_urb(urb);
412 err = -ENOMEM;
413 break;
414 }
415
416 usb_fill_bulk_urb(urb, dev->udev,
417 usb_rcvbulkpipe
418 (dev->udev,
419 dev->bulk_in->bEndpointAddress),
420 buf, KVASER_USB_RX_BUFFER_SIZE,
421 kvaser_usb_read_bulk_callback, dev);
422 urb->transfer_dma = buf_dma;
423 urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
424 usb_anchor_urb(urb, &dev->rx_submitted);
425
426 err = usb_submit_urb(urb, GFP_KERNEL);
427 if (err) {
428 usb_unanchor_urb(urb);
429 usb_free_coherent(dev->udev,
430 KVASER_USB_RX_BUFFER_SIZE, buf,
431 buf_dma);
432 usb_free_urb(urb);
433 break;
434 }
435
436 dev->rxbuf[i] = buf;
437 dev->rxbuf_dma[i] = buf_dma;
438
439 usb_free_urb(urb);
440 }
441
442 if (i == 0) {
443 dev_warn(&dev->intf->dev, "Cannot setup read URBs, error %d\n",
444 err);
445 return err;
446 } else if (i < KVASER_USB_MAX_RX_URBS) {
447 dev_warn(&dev->intf->dev, "RX performances may be slow\n");
448 }
449
450 dev->rxinitdone = true;
451
452 return 0;
453 }
454
kvaser_usb_open(struct net_device * netdev)455 static int kvaser_usb_open(struct net_device *netdev)
456 {
457 struct kvaser_usb_net_priv *priv = netdev_priv(netdev);
458 struct kvaser_usb *dev = priv->dev;
459 const struct kvaser_usb_dev_ops *ops = dev->driver_info->ops;
460 int err;
461
462 err = open_candev(netdev);
463 if (err)
464 return err;
465
466 err = ops->dev_set_opt_mode(priv);
467 if (err)
468 goto error;
469
470 err = ops->dev_start_chip(priv);
471 if (err) {
472 netdev_warn(netdev, "Cannot start device, error %d\n", err);
473 goto error;
474 }
475
476 priv->can.state = CAN_STATE_ERROR_ACTIVE;
477
478 return 0;
479
480 error:
481 close_candev(netdev);
482 return err;
483 }
484
kvaser_usb_reset_tx_urb_contexts(struct kvaser_usb_net_priv * priv)485 static void kvaser_usb_reset_tx_urb_contexts(struct kvaser_usb_net_priv *priv)
486 {
487 int i, max_tx_urbs;
488
489 max_tx_urbs = priv->dev->max_tx_urbs;
490
491 priv->active_tx_contexts = 0;
492 for (i = 0; i < max_tx_urbs; i++)
493 priv->tx_contexts[i].echo_index = max_tx_urbs;
494 }
495
496 /* This method might sleep. Do not call it in the atomic context
497 * of URB completions.
498 */
kvaser_usb_unlink_tx_urbs(struct kvaser_usb_net_priv * priv)499 void kvaser_usb_unlink_tx_urbs(struct kvaser_usb_net_priv *priv)
500 {
501 usb_kill_anchored_urbs(&priv->tx_submitted);
502 kvaser_usb_reset_tx_urb_contexts(priv);
503 }
504
kvaser_usb_unlink_all_urbs(struct kvaser_usb * dev)505 static void kvaser_usb_unlink_all_urbs(struct kvaser_usb *dev)
506 {
507 int i;
508
509 usb_kill_anchored_urbs(&dev->rx_submitted);
510
511 for (i = 0; i < KVASER_USB_MAX_RX_URBS; i++)
512 usb_free_coherent(dev->udev, KVASER_USB_RX_BUFFER_SIZE,
513 dev->rxbuf[i], dev->rxbuf_dma[i]);
514
515 for (i = 0; i < dev->nchannels; i++) {
516 struct kvaser_usb_net_priv *priv = dev->nets[i];
517
518 if (priv)
519 kvaser_usb_unlink_tx_urbs(priv);
520 }
521 }
522
kvaser_usb_close(struct net_device * netdev)523 static int kvaser_usb_close(struct net_device *netdev)
524 {
525 struct kvaser_usb_net_priv *priv = netdev_priv(netdev);
526 struct kvaser_usb *dev = priv->dev;
527 const struct kvaser_usb_dev_ops *ops = dev->driver_info->ops;
528 int err;
529
530 netif_stop_queue(netdev);
531
532 err = ops->dev_flush_queue(priv);
533 if (err)
534 netdev_warn(netdev, "Cannot flush queue, error %d\n", err);
535
536 if (ops->dev_reset_chip) {
537 err = ops->dev_reset_chip(dev, priv->channel);
538 if (err)
539 netdev_warn(netdev, "Cannot reset card, error %d\n",
540 err);
541 }
542
543 err = ops->dev_stop_chip(priv);
544 if (err)
545 netdev_warn(netdev, "Cannot stop device, error %d\n", err);
546
547 /* reset tx contexts */
548 kvaser_usb_unlink_tx_urbs(priv);
549
550 priv->can.state = CAN_STATE_STOPPED;
551 close_candev(priv->netdev);
552
553 return 0;
554 }
555
kvaser_usb_set_bittiming(struct net_device * netdev)556 static int kvaser_usb_set_bittiming(struct net_device *netdev)
557 {
558 struct kvaser_usb_net_priv *priv = netdev_priv(netdev);
559 struct kvaser_usb *dev = priv->dev;
560 const struct kvaser_usb_dev_ops *ops = dev->driver_info->ops;
561 struct can_bittiming *bt = &priv->can.bittiming;
562 struct kvaser_usb_busparams busparams;
563 int tseg1 = bt->prop_seg + bt->phase_seg1;
564 int tseg2 = bt->phase_seg2;
565 int sjw = bt->sjw;
566 int err;
567
568 busparams.bitrate = cpu_to_le32(bt->bitrate);
569 busparams.sjw = (u8)sjw;
570 busparams.tseg1 = (u8)tseg1;
571 busparams.tseg2 = (u8)tseg2;
572 if (priv->can.ctrlmode & CAN_CTRLMODE_3_SAMPLES)
573 busparams.nsamples = 3;
574 else
575 busparams.nsamples = 1;
576
577 err = ops->dev_set_bittiming(netdev, &busparams);
578 if (err)
579 return err;
580
581 err = kvaser_usb_setup_rx_urbs(priv->dev);
582 if (err)
583 return err;
584
585 err = ops->dev_get_busparams(priv);
586 if (err) {
587 /* Treat EOPNOTSUPP as success */
588 if (err == -EOPNOTSUPP)
589 err = 0;
590 return err;
591 }
592
593 if (memcmp(&busparams, &priv->busparams_nominal,
594 sizeof(priv->busparams_nominal)) != 0)
595 err = -EINVAL;
596
597 return err;
598 }
599
kvaser_usb_set_data_bittiming(struct net_device * netdev)600 static int kvaser_usb_set_data_bittiming(struct net_device *netdev)
601 {
602 struct kvaser_usb_net_priv *priv = netdev_priv(netdev);
603 struct kvaser_usb *dev = priv->dev;
604 const struct kvaser_usb_dev_ops *ops = dev->driver_info->ops;
605 struct can_bittiming *dbt = &priv->can.fd.data_bittiming;
606 struct kvaser_usb_busparams busparams;
607 int tseg1 = dbt->prop_seg + dbt->phase_seg1;
608 int tseg2 = dbt->phase_seg2;
609 int sjw = dbt->sjw;
610 int err;
611
612 if (!ops->dev_set_data_bittiming ||
613 !ops->dev_get_data_busparams)
614 return -EOPNOTSUPP;
615
616 busparams.bitrate = cpu_to_le32(dbt->bitrate);
617 busparams.sjw = (u8)sjw;
618 busparams.tseg1 = (u8)tseg1;
619 busparams.tseg2 = (u8)tseg2;
620 busparams.nsamples = 1;
621
622 err = ops->dev_set_data_bittiming(netdev, &busparams);
623 if (err)
624 return err;
625
626 err = kvaser_usb_setup_rx_urbs(priv->dev);
627 if (err)
628 return err;
629
630 err = ops->dev_get_data_busparams(priv);
631 if (err)
632 return err;
633
634 if (memcmp(&busparams, &priv->busparams_data,
635 sizeof(priv->busparams_data)) != 0)
636 err = -EINVAL;
637
638 return err;
639 }
640
kvaser_usb_write_bulk_callback(struct urb * urb)641 static void kvaser_usb_write_bulk_callback(struct urb *urb)
642 {
643 struct kvaser_usb_tx_urb_context *context = urb->context;
644 struct kvaser_usb_net_priv *priv;
645 struct net_device *netdev;
646
647 if (WARN_ON(!context))
648 return;
649
650 priv = context->priv;
651 netdev = priv->netdev;
652
653 kfree(urb->transfer_buffer);
654
655 if (!netif_device_present(netdev))
656 return;
657
658 if (urb->status)
659 netdev_info(netdev, "Tx URB aborted (%d)\n", urb->status);
660 }
661
kvaser_usb_start_xmit(struct sk_buff * skb,struct net_device * netdev)662 static netdev_tx_t kvaser_usb_start_xmit(struct sk_buff *skb,
663 struct net_device *netdev)
664 {
665 struct kvaser_usb_net_priv *priv = netdev_priv(netdev);
666 struct kvaser_usb *dev = priv->dev;
667 const struct kvaser_usb_dev_ops *ops = dev->driver_info->ops;
668 struct net_device_stats *stats = &netdev->stats;
669 struct kvaser_usb_tx_urb_context *context = NULL;
670 struct urb *urb;
671 void *buf;
672 int cmd_len = 0;
673 int err, ret = NETDEV_TX_OK;
674 unsigned int i;
675 unsigned long flags;
676
677 if (can_dev_dropped_skb(netdev, skb))
678 return NETDEV_TX_OK;
679
680 urb = usb_alloc_urb(0, GFP_ATOMIC);
681 if (!urb) {
682 stats->tx_dropped++;
683 dev_kfree_skb(skb);
684 return NETDEV_TX_OK;
685 }
686
687 spin_lock_irqsave(&priv->tx_contexts_lock, flags);
688 for (i = 0; i < dev->max_tx_urbs; i++) {
689 if (priv->tx_contexts[i].echo_index == dev->max_tx_urbs) {
690 context = &priv->tx_contexts[i];
691
692 context->echo_index = i;
693 ++priv->active_tx_contexts;
694 if (priv->active_tx_contexts >= (int)dev->max_tx_urbs)
695 netif_stop_queue(netdev);
696
697 break;
698 }
699 }
700 spin_unlock_irqrestore(&priv->tx_contexts_lock, flags);
701
702 /* This should never happen; it implies a flow control bug */
703 if (!context) {
704 netdev_warn(netdev, "cannot find free context\n");
705
706 ret = NETDEV_TX_BUSY;
707 goto freeurb;
708 }
709
710 buf = ops->dev_frame_to_cmd(priv, skb, &cmd_len, context->echo_index);
711 if (!buf) {
712 stats->tx_dropped++;
713 dev_kfree_skb(skb);
714 spin_lock_irqsave(&priv->tx_contexts_lock, flags);
715
716 context->echo_index = dev->max_tx_urbs;
717 --priv->active_tx_contexts;
718 netif_wake_queue(netdev);
719
720 spin_unlock_irqrestore(&priv->tx_contexts_lock, flags);
721 goto freeurb;
722 }
723
724 context->priv = priv;
725
726 can_put_echo_skb(skb, netdev, context->echo_index, 0);
727
728 usb_fill_bulk_urb(urb, dev->udev,
729 usb_sndbulkpipe(dev->udev,
730 dev->bulk_out->bEndpointAddress),
731 buf, cmd_len, kvaser_usb_write_bulk_callback,
732 context);
733 usb_anchor_urb(urb, &priv->tx_submitted);
734
735 err = usb_submit_urb(urb, GFP_ATOMIC);
736 if (unlikely(err)) {
737 spin_lock_irqsave(&priv->tx_contexts_lock, flags);
738
739 can_free_echo_skb(netdev, context->echo_index, NULL);
740 context->echo_index = dev->max_tx_urbs;
741 --priv->active_tx_contexts;
742 netif_wake_queue(netdev);
743
744 spin_unlock_irqrestore(&priv->tx_contexts_lock, flags);
745
746 usb_unanchor_urb(urb);
747 kfree(buf);
748
749 stats->tx_dropped++;
750
751 if (err == -ENODEV)
752 netif_device_detach(netdev);
753 else
754 netdev_warn(netdev, "Failed tx_urb %d\n", err);
755
756 goto freeurb;
757 }
758
759 ret = NETDEV_TX_OK;
760
761 freeurb:
762 usb_free_urb(urb);
763 return ret;
764 }
765
kvaser_usb_set_phys_id(struct net_device * netdev,enum ethtool_phys_id_state state)766 static int kvaser_usb_set_phys_id(struct net_device *netdev,
767 enum ethtool_phys_id_state state)
768 {
769 struct kvaser_usb_net_priv *priv = netdev_priv(netdev);
770 const struct kvaser_usb_dev_ops *ops = priv->dev->driver_info->ops;
771
772 switch (state) {
773 case ETHTOOL_ID_ACTIVE:
774 return 3; /* 3 On/Off cycles per second */
775
776 case ETHTOOL_ID_ON:
777 return ops->dev_set_led(priv, KVASER_USB_LED_ON, 1000);
778
779 case ETHTOOL_ID_OFF:
780 return ops->dev_set_led(priv, KVASER_USB_LED_OFF, 1000);
781
782 case ETHTOOL_ID_INACTIVE:
783 /* Turn LED off and restore standard function after 1ms */
784 return ops->dev_set_led(priv, KVASER_USB_LED_OFF, 1);
785
786 default:
787 return -EINVAL;
788 }
789 }
790
791 static const struct net_device_ops kvaser_usb_netdev_ops = {
792 .ndo_open = kvaser_usb_open,
793 .ndo_stop = kvaser_usb_close,
794 .ndo_start_xmit = kvaser_usb_start_xmit,
795 .ndo_hwtstamp_get = can_hwtstamp_get,
796 .ndo_hwtstamp_set = can_hwtstamp_set,
797 };
798
799 static const struct ethtool_ops kvaser_usb_ethtool_ops = {
800 .get_ts_info = can_ethtool_op_get_ts_info_hwts,
801 .set_phys_id = kvaser_usb_set_phys_id,
802 };
803
kvaser_usb_remove_interfaces(struct kvaser_usb * dev)804 static void kvaser_usb_remove_interfaces(struct kvaser_usb *dev)
805 {
806 const struct kvaser_usb_dev_ops *ops = dev->driver_info->ops;
807 int i;
808 struct kvaser_usb_net_priv *priv;
809
810 for (i = 0; i < dev->nchannels; i++) {
811 priv = dev->nets[i];
812 if (!priv)
813 continue;
814
815 unregister_candev(priv->netdev);
816 }
817
818 kvaser_usb_unlink_all_urbs(dev);
819
820 for (i = 0; i < dev->nchannels; i++) {
821 priv = dev->nets[i];
822 if (!priv)
823 continue;
824
825 if (ops->dev_remove_channel)
826 ops->dev_remove_channel(priv);
827
828 kvaser_usb_devlink_port_unregister(priv);
829 free_candev(priv->netdev);
830 }
831 }
832
kvaser_usb_init_one(struct kvaser_usb * dev,int channel)833 static int kvaser_usb_init_one(struct kvaser_usb *dev, int channel)
834 {
835 struct net_device *netdev;
836 struct kvaser_usb_net_priv *priv;
837 const struct kvaser_usb_driver_info *driver_info = dev->driver_info;
838 const struct kvaser_usb_dev_ops *ops = driver_info->ops;
839 int err;
840
841 if (ops->dev_reset_chip) {
842 err = ops->dev_reset_chip(dev, channel);
843 if (err)
844 return err;
845 }
846
847 netdev = alloc_candev(struct_size(priv, tx_contexts, dev->max_tx_urbs),
848 dev->max_tx_urbs);
849 if (!netdev) {
850 dev_err(&dev->intf->dev, "Cannot alloc candev\n");
851 return -ENOMEM;
852 }
853
854 priv = netdev_priv(netdev);
855
856 init_usb_anchor(&priv->tx_submitted);
857 init_completion(&priv->start_comp);
858 init_completion(&priv->stop_comp);
859 init_completion(&priv->flush_comp);
860 init_completion(&priv->get_busparams_comp);
861 priv->can.ctrlmode_supported = CAN_CTRLMODE_CC_LEN8_DLC |
862 CAN_CTRLMODE_BERR_REPORTING;
863
864 priv->dev = dev;
865 priv->netdev = netdev;
866 priv->channel = channel;
867
868 spin_lock_init(&priv->tx_contexts_lock);
869 kvaser_usb_reset_tx_urb_contexts(priv);
870
871 priv->can.state = CAN_STATE_STOPPED;
872 priv->can.clock.freq = dev->cfg->clock.freq;
873 priv->can.bittiming_const = dev->cfg->bittiming_const;
874 priv->can.do_set_bittiming = kvaser_usb_set_bittiming;
875 priv->can.do_set_mode = ops->dev_set_mode;
876 if ((driver_info->quirks & KVASER_USB_QUIRK_HAS_TXRX_ERRORS) ||
877 (priv->dev->card_data.capabilities & KVASER_USB_CAP_BERR_CAP))
878 priv->can.do_get_berr_counter = ops->dev_get_berr_counter;
879 if (driver_info->quirks & KVASER_USB_QUIRK_HAS_SILENT_MODE)
880 priv->can.ctrlmode_supported |= CAN_CTRLMODE_LISTENONLY;
881
882 priv->can.ctrlmode_supported |= dev->card_data.ctrlmode_supported;
883
884 if (priv->can.ctrlmode_supported & CAN_CTRLMODE_FD) {
885 priv->can.fd.data_bittiming_const = dev->cfg->data_bittiming_const;
886 priv->can.fd.do_set_data_bittiming = kvaser_usb_set_data_bittiming;
887 }
888
889 netdev->flags |= IFF_ECHO;
890
891 netdev->netdev_ops = &kvaser_usb_netdev_ops;
892 netdev->ethtool_ops = &kvaser_usb_ethtool_ops;
893 SET_NETDEV_DEV(netdev, &dev->intf->dev);
894 netdev->dev_id = channel;
895 netdev->dev_port = channel;
896
897 dev->nets[channel] = priv;
898
899 if (ops->dev_init_channel) {
900 err = ops->dev_init_channel(priv);
901 if (err)
902 goto candev_free;
903 }
904
905 err = kvaser_usb_devlink_port_register(priv);
906 if (err) {
907 dev_err(&dev->intf->dev, "Failed to register devlink port\n");
908 goto candev_free;
909 }
910
911 err = register_candev(netdev);
912 if (err) {
913 dev_err(&dev->intf->dev, "Failed to register CAN device\n");
914 goto unregister_devlink_port;
915 }
916
917 netdev_dbg(netdev, "device registered\n");
918
919 return 0;
920
921 unregister_devlink_port:
922 kvaser_usb_devlink_port_unregister(priv);
923 candev_free:
924 free_candev(netdev);
925 dev->nets[channel] = NULL;
926 return err;
927 }
928
kvaser_usb_probe(struct usb_interface * intf,const struct usb_device_id * id)929 static int kvaser_usb_probe(struct usb_interface *intf,
930 const struct usb_device_id *id)
931 {
932 struct kvaser_usb *dev;
933 struct devlink *devlink;
934 int err;
935 int i;
936 const struct kvaser_usb_driver_info *driver_info;
937 const struct kvaser_usb_dev_ops *ops;
938
939 driver_info = (const struct kvaser_usb_driver_info *)id->driver_info;
940 if (!driver_info)
941 return -ENODEV;
942
943 devlink = devlink_alloc(&kvaser_usb_devlink_ops, sizeof(*dev), &intf->dev);
944 if (!devlink)
945 return -ENOMEM;
946
947 dev = devlink_priv(devlink);
948 dev->intf = intf;
949 dev->driver_info = driver_info;
950 ops = driver_info->ops;
951
952 err = ops->dev_setup_endpoints(dev);
953 if (err) {
954 dev_err_probe(&intf->dev, err, "Cannot get usb endpoint(s)");
955 goto free_devlink;
956 }
957
958 dev->udev = interface_to_usbdev(intf);
959
960 init_usb_anchor(&dev->rx_submitted);
961
962 usb_set_intfdata(intf, dev);
963
964 dev->card_data.ctrlmode_supported = 0;
965 dev->card_data.capabilities = 0;
966 err = ops->dev_init_card(dev);
967 if (err) {
968 dev_err_probe(&intf->dev, err,
969 "Failed to initialize card\n");
970 goto free_devlink;
971 }
972
973 err = ops->dev_get_software_info(dev);
974 if (err) {
975 dev_err_probe(&intf->dev, err,
976 "Cannot get software info\n");
977 goto free_devlink;
978 }
979
980 if (ops->dev_get_software_details) {
981 err = ops->dev_get_software_details(dev);
982 if (err) {
983 dev_err_probe(&intf->dev, err,
984 "Cannot get software details\n");
985 goto free_devlink;
986 }
987 }
988
989 if (WARN_ON(!dev->cfg)) {
990 err = -ENODEV;
991 goto free_devlink;
992 }
993
994 dev_dbg(&intf->dev, "Max outstanding tx = %d URBs\n", dev->max_tx_urbs);
995
996 err = ops->dev_get_card_info(dev);
997 if (err) {
998 dev_err_probe(&intf->dev, err,
999 "Cannot get card info\n");
1000 goto free_devlink;
1001 }
1002
1003 if (ops->dev_get_capabilities) {
1004 err = ops->dev_get_capabilities(dev);
1005 if (err) {
1006 dev_err_probe(&intf->dev, err,
1007 "Cannot get capabilities\n");
1008 goto remove_interfaces;
1009 }
1010 }
1011
1012 for (i = 0; i < dev->nchannels; i++) {
1013 err = kvaser_usb_init_one(dev, i);
1014 if (err)
1015 goto remove_interfaces;
1016 }
1017 devlink_register(devlink);
1018
1019 return 0;
1020
1021 remove_interfaces:
1022 kvaser_usb_remove_interfaces(dev);
1023 free_devlink:
1024 devlink_free(devlink);
1025
1026 return err;
1027 }
1028
kvaser_usb_disconnect(struct usb_interface * intf)1029 static void kvaser_usb_disconnect(struct usb_interface *intf)
1030 {
1031 struct kvaser_usb *dev = usb_get_intfdata(intf);
1032
1033 usb_set_intfdata(intf, NULL);
1034
1035 if (!dev)
1036 return;
1037
1038 kvaser_usb_remove_interfaces(dev);
1039 devlink_unregister(priv_to_devlink(dev));
1040 devlink_free(priv_to_devlink(dev));
1041 }
1042
1043 static struct usb_driver kvaser_usb_driver = {
1044 .name = KBUILD_MODNAME,
1045 .probe = kvaser_usb_probe,
1046 .disconnect = kvaser_usb_disconnect,
1047 .id_table = kvaser_usb_table,
1048 };
1049
1050 module_usb_driver(kvaser_usb_driver);
1051
1052 MODULE_AUTHOR("Olivier Sobrie <olivier@sobrie.be>");
1053 MODULE_AUTHOR("Kvaser AB <support@kvaser.com>");
1054 MODULE_DESCRIPTION("CAN driver for Kvaser CAN/USB devices");
1055 MODULE_LICENSE("GPL v2");
1056