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 <[email protected]>, esd gmbh
10 * Copyright (C) 2012 Olivier Sobrie <[email protected]>
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 if (!dev->nets[i])
368 continue;
369
370 netif_device_detach(dev->nets[i]->netdev);
371 }
372 } else if (err) {
373 dev_err(&dev->intf->dev,
374 "Failed resubmitting read bulk urb: %d\n", err);
375 }
376 }
377
kvaser_usb_setup_rx_urbs(struct kvaser_usb * dev)378 static int kvaser_usb_setup_rx_urbs(struct kvaser_usb *dev)
379 {
380 int i, err = 0;
381
382 if (dev->rxinitdone)
383 return 0;
384
385 for (i = 0; i < KVASER_USB_MAX_RX_URBS; i++) {
386 struct urb *urb = NULL;
387 u8 *buf = NULL;
388 dma_addr_t buf_dma;
389
390 urb = usb_alloc_urb(0, GFP_KERNEL);
391 if (!urb) {
392 err = -ENOMEM;
393 break;
394 }
395
396 buf = usb_alloc_coherent(dev->udev, KVASER_USB_RX_BUFFER_SIZE,
397 GFP_KERNEL, &buf_dma);
398 if (!buf) {
399 dev_warn(&dev->intf->dev,
400 "No memory left for USB buffer\n");
401 usb_free_urb(urb);
402 err = -ENOMEM;
403 break;
404 }
405
406 usb_fill_bulk_urb(urb, dev->udev,
407 usb_rcvbulkpipe
408 (dev->udev,
409 dev->bulk_in->bEndpointAddress),
410 buf, KVASER_USB_RX_BUFFER_SIZE,
411 kvaser_usb_read_bulk_callback, dev);
412 urb->transfer_dma = buf_dma;
413 urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
414 usb_anchor_urb(urb, &dev->rx_submitted);
415
416 err = usb_submit_urb(urb, GFP_KERNEL);
417 if (err) {
418 usb_unanchor_urb(urb);
419 usb_free_coherent(dev->udev,
420 KVASER_USB_RX_BUFFER_SIZE, buf,
421 buf_dma);
422 usb_free_urb(urb);
423 break;
424 }
425
426 dev->rxbuf[i] = buf;
427 dev->rxbuf_dma[i] = buf_dma;
428
429 usb_free_urb(urb);
430 }
431
432 if (i == 0) {
433 dev_warn(&dev->intf->dev, "Cannot setup read URBs, error %d\n",
434 err);
435 return err;
436 } else if (i < KVASER_USB_MAX_RX_URBS) {
437 dev_warn(&dev->intf->dev, "RX performances may be slow\n");
438 }
439
440 dev->rxinitdone = true;
441
442 return 0;
443 }
444
kvaser_usb_open(struct net_device * netdev)445 static int kvaser_usb_open(struct net_device *netdev)
446 {
447 struct kvaser_usb_net_priv *priv = netdev_priv(netdev);
448 struct kvaser_usb *dev = priv->dev;
449 const struct kvaser_usb_dev_ops *ops = dev->driver_info->ops;
450 int err;
451
452 err = open_candev(netdev);
453 if (err)
454 return err;
455
456 err = ops->dev_set_opt_mode(priv);
457 if (err)
458 goto error;
459
460 err = ops->dev_start_chip(priv);
461 if (err) {
462 netdev_warn(netdev, "Cannot start device, error %d\n", err);
463 goto error;
464 }
465
466 priv->can.state = CAN_STATE_ERROR_ACTIVE;
467
468 return 0;
469
470 error:
471 close_candev(netdev);
472 return err;
473 }
474
kvaser_usb_reset_tx_urb_contexts(struct kvaser_usb_net_priv * priv)475 static void kvaser_usb_reset_tx_urb_contexts(struct kvaser_usb_net_priv *priv)
476 {
477 int i, max_tx_urbs;
478
479 max_tx_urbs = priv->dev->max_tx_urbs;
480
481 priv->active_tx_contexts = 0;
482 for (i = 0; i < max_tx_urbs; i++)
483 priv->tx_contexts[i].echo_index = max_tx_urbs;
484 }
485
486 /* This method might sleep. Do not call it in the atomic context
487 * of URB completions.
488 */
kvaser_usb_unlink_tx_urbs(struct kvaser_usb_net_priv * priv)489 void kvaser_usb_unlink_tx_urbs(struct kvaser_usb_net_priv *priv)
490 {
491 usb_kill_anchored_urbs(&priv->tx_submitted);
492 kvaser_usb_reset_tx_urb_contexts(priv);
493 }
494
kvaser_usb_unlink_all_urbs(struct kvaser_usb * dev)495 static void kvaser_usb_unlink_all_urbs(struct kvaser_usb *dev)
496 {
497 int i;
498
499 usb_kill_anchored_urbs(&dev->rx_submitted);
500
501 for (i = 0; i < KVASER_USB_MAX_RX_URBS; i++)
502 usb_free_coherent(dev->udev, KVASER_USB_RX_BUFFER_SIZE,
503 dev->rxbuf[i], dev->rxbuf_dma[i]);
504
505 for (i = 0; i < dev->nchannels; i++) {
506 struct kvaser_usb_net_priv *priv = dev->nets[i];
507
508 if (priv)
509 kvaser_usb_unlink_tx_urbs(priv);
510 }
511 }
512
kvaser_usb_close(struct net_device * netdev)513 static int kvaser_usb_close(struct net_device *netdev)
514 {
515 struct kvaser_usb_net_priv *priv = netdev_priv(netdev);
516 struct kvaser_usb *dev = priv->dev;
517 const struct kvaser_usb_dev_ops *ops = dev->driver_info->ops;
518 int err;
519
520 netif_stop_queue(netdev);
521
522 err = ops->dev_flush_queue(priv);
523 if (err)
524 netdev_warn(netdev, "Cannot flush queue, error %d\n", err);
525
526 if (ops->dev_reset_chip) {
527 err = ops->dev_reset_chip(dev, priv->channel);
528 if (err)
529 netdev_warn(netdev, "Cannot reset card, error %d\n",
530 err);
531 }
532
533 err = ops->dev_stop_chip(priv);
534 if (err)
535 netdev_warn(netdev, "Cannot stop device, error %d\n", err);
536
537 /* reset tx contexts */
538 kvaser_usb_unlink_tx_urbs(priv);
539
540 priv->can.state = CAN_STATE_STOPPED;
541 close_candev(priv->netdev);
542
543 return 0;
544 }
545
kvaser_usb_set_bittiming(struct net_device * netdev)546 static int kvaser_usb_set_bittiming(struct net_device *netdev)
547 {
548 struct kvaser_usb_net_priv *priv = netdev_priv(netdev);
549 struct kvaser_usb *dev = priv->dev;
550 const struct kvaser_usb_dev_ops *ops = dev->driver_info->ops;
551 struct can_bittiming *bt = &priv->can.bittiming;
552 struct kvaser_usb_busparams busparams;
553 int tseg1 = bt->prop_seg + bt->phase_seg1;
554 int tseg2 = bt->phase_seg2;
555 int sjw = bt->sjw;
556 int err;
557
558 busparams.bitrate = cpu_to_le32(bt->bitrate);
559 busparams.sjw = (u8)sjw;
560 busparams.tseg1 = (u8)tseg1;
561 busparams.tseg2 = (u8)tseg2;
562 if (priv->can.ctrlmode & CAN_CTRLMODE_3_SAMPLES)
563 busparams.nsamples = 3;
564 else
565 busparams.nsamples = 1;
566
567 err = ops->dev_set_bittiming(netdev, &busparams);
568 if (err)
569 return err;
570
571 err = kvaser_usb_setup_rx_urbs(priv->dev);
572 if (err)
573 return err;
574
575 err = ops->dev_get_busparams(priv);
576 if (err) {
577 /* Treat EOPNOTSUPP as success */
578 if (err == -EOPNOTSUPP)
579 err = 0;
580 return err;
581 }
582
583 if (memcmp(&busparams, &priv->busparams_nominal,
584 sizeof(priv->busparams_nominal)) != 0)
585 err = -EINVAL;
586
587 return err;
588 }
589
kvaser_usb_set_data_bittiming(struct net_device * netdev)590 static int kvaser_usb_set_data_bittiming(struct net_device *netdev)
591 {
592 struct kvaser_usb_net_priv *priv = netdev_priv(netdev);
593 struct kvaser_usb *dev = priv->dev;
594 const struct kvaser_usb_dev_ops *ops = dev->driver_info->ops;
595 struct can_bittiming *dbt = &priv->can.data_bittiming;
596 struct kvaser_usb_busparams busparams;
597 int tseg1 = dbt->prop_seg + dbt->phase_seg1;
598 int tseg2 = dbt->phase_seg2;
599 int sjw = dbt->sjw;
600 int err;
601
602 if (!ops->dev_set_data_bittiming ||
603 !ops->dev_get_data_busparams)
604 return -EOPNOTSUPP;
605
606 busparams.bitrate = cpu_to_le32(dbt->bitrate);
607 busparams.sjw = (u8)sjw;
608 busparams.tseg1 = (u8)tseg1;
609 busparams.tseg2 = (u8)tseg2;
610 busparams.nsamples = 1;
611
612 err = ops->dev_set_data_bittiming(netdev, &busparams);
613 if (err)
614 return err;
615
616 err = kvaser_usb_setup_rx_urbs(priv->dev);
617 if (err)
618 return err;
619
620 err = ops->dev_get_data_busparams(priv);
621 if (err)
622 return err;
623
624 if (memcmp(&busparams, &priv->busparams_data,
625 sizeof(priv->busparams_data)) != 0)
626 err = -EINVAL;
627
628 return err;
629 }
630
kvaser_usb_write_bulk_callback(struct urb * urb)631 static void kvaser_usb_write_bulk_callback(struct urb *urb)
632 {
633 struct kvaser_usb_tx_urb_context *context = urb->context;
634 struct kvaser_usb_net_priv *priv;
635 struct net_device *netdev;
636
637 if (WARN_ON(!context))
638 return;
639
640 priv = context->priv;
641 netdev = priv->netdev;
642
643 kfree(urb->transfer_buffer);
644
645 if (!netif_device_present(netdev))
646 return;
647
648 if (urb->status)
649 netdev_info(netdev, "Tx URB aborted (%d)\n", urb->status);
650 }
651
kvaser_usb_start_xmit(struct sk_buff * skb,struct net_device * netdev)652 static netdev_tx_t kvaser_usb_start_xmit(struct sk_buff *skb,
653 struct net_device *netdev)
654 {
655 struct kvaser_usb_net_priv *priv = netdev_priv(netdev);
656 struct kvaser_usb *dev = priv->dev;
657 const struct kvaser_usb_dev_ops *ops = dev->driver_info->ops;
658 struct net_device_stats *stats = &netdev->stats;
659 struct kvaser_usb_tx_urb_context *context = NULL;
660 struct urb *urb;
661 void *buf;
662 int cmd_len = 0;
663 int err, ret = NETDEV_TX_OK;
664 unsigned int i;
665 unsigned long flags;
666
667 if (can_dev_dropped_skb(netdev, skb))
668 return NETDEV_TX_OK;
669
670 urb = usb_alloc_urb(0, GFP_ATOMIC);
671 if (!urb) {
672 stats->tx_dropped++;
673 dev_kfree_skb(skb);
674 return NETDEV_TX_OK;
675 }
676
677 spin_lock_irqsave(&priv->tx_contexts_lock, flags);
678 for (i = 0; i < dev->max_tx_urbs; i++) {
679 if (priv->tx_contexts[i].echo_index == dev->max_tx_urbs) {
680 context = &priv->tx_contexts[i];
681
682 context->echo_index = i;
683 ++priv->active_tx_contexts;
684 if (priv->active_tx_contexts >= (int)dev->max_tx_urbs)
685 netif_stop_queue(netdev);
686
687 break;
688 }
689 }
690 spin_unlock_irqrestore(&priv->tx_contexts_lock, flags);
691
692 /* This should never happen; it implies a flow control bug */
693 if (!context) {
694 netdev_warn(netdev, "cannot find free context\n");
695
696 ret = NETDEV_TX_BUSY;
697 goto freeurb;
698 }
699
700 buf = ops->dev_frame_to_cmd(priv, skb, &cmd_len, context->echo_index);
701 if (!buf) {
702 stats->tx_dropped++;
703 dev_kfree_skb(skb);
704 spin_lock_irqsave(&priv->tx_contexts_lock, flags);
705
706 context->echo_index = dev->max_tx_urbs;
707 --priv->active_tx_contexts;
708 netif_wake_queue(netdev);
709
710 spin_unlock_irqrestore(&priv->tx_contexts_lock, flags);
711 goto freeurb;
712 }
713
714 context->priv = priv;
715
716 can_put_echo_skb(skb, netdev, context->echo_index, 0);
717
718 usb_fill_bulk_urb(urb, dev->udev,
719 usb_sndbulkpipe(dev->udev,
720 dev->bulk_out->bEndpointAddress),
721 buf, cmd_len, kvaser_usb_write_bulk_callback,
722 context);
723 usb_anchor_urb(urb, &priv->tx_submitted);
724
725 err = usb_submit_urb(urb, GFP_ATOMIC);
726 if (unlikely(err)) {
727 spin_lock_irqsave(&priv->tx_contexts_lock, flags);
728
729 can_free_echo_skb(netdev, context->echo_index, NULL);
730 context->echo_index = dev->max_tx_urbs;
731 --priv->active_tx_contexts;
732 netif_wake_queue(netdev);
733
734 spin_unlock_irqrestore(&priv->tx_contexts_lock, flags);
735
736 usb_unanchor_urb(urb);
737 kfree(buf);
738
739 stats->tx_dropped++;
740
741 if (err == -ENODEV)
742 netif_device_detach(netdev);
743 else
744 netdev_warn(netdev, "Failed tx_urb %d\n", err);
745
746 goto freeurb;
747 }
748
749 ret = NETDEV_TX_OK;
750
751 freeurb:
752 usb_free_urb(urb);
753 return ret;
754 }
755
756 static const struct net_device_ops kvaser_usb_netdev_ops = {
757 .ndo_open = kvaser_usb_open,
758 .ndo_stop = kvaser_usb_close,
759 .ndo_eth_ioctl = can_eth_ioctl_hwts,
760 .ndo_start_xmit = kvaser_usb_start_xmit,
761 .ndo_change_mtu = can_change_mtu,
762 };
763
764 static const struct ethtool_ops kvaser_usb_ethtool_ops = {
765 .get_ts_info = can_ethtool_op_get_ts_info_hwts,
766 };
767
kvaser_usb_remove_interfaces(struct kvaser_usb * dev)768 static void kvaser_usb_remove_interfaces(struct kvaser_usb *dev)
769 {
770 const struct kvaser_usb_dev_ops *ops = dev->driver_info->ops;
771 int i;
772
773 for (i = 0; i < dev->nchannels; i++) {
774 if (!dev->nets[i])
775 continue;
776
777 unregister_candev(dev->nets[i]->netdev);
778 }
779
780 kvaser_usb_unlink_all_urbs(dev);
781
782 for (i = 0; i < dev->nchannels; i++) {
783 if (!dev->nets[i])
784 continue;
785
786 if (ops->dev_remove_channel)
787 ops->dev_remove_channel(dev->nets[i]);
788
789 free_candev(dev->nets[i]->netdev);
790 }
791 }
792
kvaser_usb_init_one(struct kvaser_usb * dev,int channel)793 static int kvaser_usb_init_one(struct kvaser_usb *dev, int channel)
794 {
795 struct net_device *netdev;
796 struct kvaser_usb_net_priv *priv;
797 const struct kvaser_usb_driver_info *driver_info = dev->driver_info;
798 const struct kvaser_usb_dev_ops *ops = driver_info->ops;
799 int err;
800
801 if (ops->dev_reset_chip) {
802 err = ops->dev_reset_chip(dev, channel);
803 if (err)
804 return err;
805 }
806
807 netdev = alloc_candev(struct_size(priv, tx_contexts, dev->max_tx_urbs),
808 dev->max_tx_urbs);
809 if (!netdev) {
810 dev_err(&dev->intf->dev, "Cannot alloc candev\n");
811 return -ENOMEM;
812 }
813
814 priv = netdev_priv(netdev);
815
816 init_usb_anchor(&priv->tx_submitted);
817 init_completion(&priv->start_comp);
818 init_completion(&priv->stop_comp);
819 init_completion(&priv->flush_comp);
820 init_completion(&priv->get_busparams_comp);
821 priv->can.ctrlmode_supported = CAN_CTRLMODE_CC_LEN8_DLC |
822 CAN_CTRLMODE_BERR_REPORTING;
823
824 priv->dev = dev;
825 priv->netdev = netdev;
826 priv->channel = channel;
827
828 spin_lock_init(&priv->tx_contexts_lock);
829 kvaser_usb_reset_tx_urb_contexts(priv);
830
831 priv->can.state = CAN_STATE_STOPPED;
832 priv->can.clock.freq = dev->cfg->clock.freq;
833 priv->can.bittiming_const = dev->cfg->bittiming_const;
834 priv->can.do_set_bittiming = kvaser_usb_set_bittiming;
835 priv->can.do_set_mode = ops->dev_set_mode;
836 if ((driver_info->quirks & KVASER_USB_QUIRK_HAS_TXRX_ERRORS) ||
837 (priv->dev->card_data.capabilities & KVASER_USB_CAP_BERR_CAP))
838 priv->can.do_get_berr_counter = ops->dev_get_berr_counter;
839 if (driver_info->quirks & KVASER_USB_QUIRK_HAS_SILENT_MODE)
840 priv->can.ctrlmode_supported |= CAN_CTRLMODE_LISTENONLY;
841
842 priv->can.ctrlmode_supported |= dev->card_data.ctrlmode_supported;
843
844 if (priv->can.ctrlmode_supported & CAN_CTRLMODE_FD) {
845 priv->can.data_bittiming_const = dev->cfg->data_bittiming_const;
846 priv->can.do_set_data_bittiming = kvaser_usb_set_data_bittiming;
847 }
848
849 netdev->flags |= IFF_ECHO;
850
851 netdev->netdev_ops = &kvaser_usb_netdev_ops;
852 netdev->ethtool_ops = &kvaser_usb_ethtool_ops;
853 SET_NETDEV_DEV(netdev, &dev->intf->dev);
854 netdev->dev_id = channel;
855
856 dev->nets[channel] = priv;
857
858 if (ops->dev_init_channel) {
859 err = ops->dev_init_channel(priv);
860 if (err)
861 goto err;
862 }
863
864 err = register_candev(netdev);
865 if (err) {
866 dev_err(&dev->intf->dev, "Failed to register CAN device\n");
867 goto err;
868 }
869
870 netdev_dbg(netdev, "device registered\n");
871
872 return 0;
873
874 err:
875 free_candev(netdev);
876 dev->nets[channel] = NULL;
877 return err;
878 }
879
kvaser_usb_probe(struct usb_interface * intf,const struct usb_device_id * id)880 static int kvaser_usb_probe(struct usb_interface *intf,
881 const struct usb_device_id *id)
882 {
883 struct kvaser_usb *dev;
884 int err;
885 int i;
886 const struct kvaser_usb_driver_info *driver_info;
887 const struct kvaser_usb_dev_ops *ops;
888
889 driver_info = (const struct kvaser_usb_driver_info *)id->driver_info;
890 if (!driver_info)
891 return -ENODEV;
892
893 dev = devm_kzalloc(&intf->dev, sizeof(*dev), GFP_KERNEL);
894 if (!dev)
895 return -ENOMEM;
896
897 dev->intf = intf;
898 dev->driver_info = driver_info;
899 ops = driver_info->ops;
900
901 err = ops->dev_setup_endpoints(dev);
902 if (err)
903 return dev_err_probe(&intf->dev, err, "Cannot get usb endpoint(s)");
904
905 dev->udev = interface_to_usbdev(intf);
906
907 init_usb_anchor(&dev->rx_submitted);
908
909 usb_set_intfdata(intf, dev);
910
911 dev->card_data.ctrlmode_supported = 0;
912 dev->card_data.capabilities = 0;
913 err = ops->dev_init_card(dev);
914 if (err)
915 return dev_err_probe(&intf->dev, err,
916 "Failed to initialize card\n");
917
918 err = ops->dev_get_software_info(dev);
919 if (err)
920 return dev_err_probe(&intf->dev, err,
921 "Cannot get software info\n");
922
923 if (ops->dev_get_software_details) {
924 err = ops->dev_get_software_details(dev);
925 if (err)
926 return dev_err_probe(&intf->dev, err,
927 "Cannot get software details\n");
928 }
929
930 if (WARN_ON(!dev->cfg))
931 return -ENODEV;
932
933 dev_dbg(&intf->dev, "Firmware version: %d.%d.%d\n",
934 ((dev->fw_version >> 24) & 0xff),
935 ((dev->fw_version >> 16) & 0xff),
936 (dev->fw_version & 0xffff));
937
938 dev_dbg(&intf->dev, "Max outstanding tx = %d URBs\n", dev->max_tx_urbs);
939
940 err = ops->dev_get_card_info(dev);
941 if (err)
942 return dev_err_probe(&intf->dev, err,
943 "Cannot get card info\n");
944
945 if (ops->dev_get_capabilities) {
946 err = ops->dev_get_capabilities(dev);
947 if (err) {
948 kvaser_usb_remove_interfaces(dev);
949 return dev_err_probe(&intf->dev, err,
950 "Cannot get capabilities\n");
951 }
952 }
953
954 for (i = 0; i < dev->nchannels; i++) {
955 err = kvaser_usb_init_one(dev, i);
956 if (err) {
957 kvaser_usb_remove_interfaces(dev);
958 return err;
959 }
960 }
961
962 return 0;
963 }
964
kvaser_usb_disconnect(struct usb_interface * intf)965 static void kvaser_usb_disconnect(struct usb_interface *intf)
966 {
967 struct kvaser_usb *dev = usb_get_intfdata(intf);
968
969 usb_set_intfdata(intf, NULL);
970
971 if (!dev)
972 return;
973
974 kvaser_usb_remove_interfaces(dev);
975 }
976
977 static struct usb_driver kvaser_usb_driver = {
978 .name = KBUILD_MODNAME,
979 .probe = kvaser_usb_probe,
980 .disconnect = kvaser_usb_disconnect,
981 .id_table = kvaser_usb_table,
982 };
983
984 module_usb_driver(kvaser_usb_driver);
985
986 MODULE_AUTHOR("Olivier Sobrie <[email protected]>");
987 MODULE_AUTHOR("Kvaser AB <[email protected]>");
988 MODULE_DESCRIPTION("CAN driver for Kvaser CAN/USB devices");
989 MODULE_LICENSE("GPL v2");
990