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)
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.
14 #include <linux/completion.h>
15 #include <linux/device.h>
16 #include <linux/ethtool.h>
17 #include <linux/gfp.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>
26 #include <linux/can.h>
27 #include <linux/can/dev.h>
28 #include <linux/can/error.h>
29 #include <linux/can/netlink.h>
31 #include "kvaser_usb.h"
33 /* Kvaser USB vendor id. */
34 #define KVASER_VENDOR_ID 0x0bfd
36 /* Kvaser Leaf USB devices product ids */
37 #define USB_LEAF_DEVEL_PRODUCT_ID 10
38 #define USB_LEAF_LITE_PRODUCT_ID 11
39 #define USB_LEAF_PRO_PRODUCT_ID 12
40 #define USB_LEAF_SPRO_PRODUCT_ID 14
41 #define USB_LEAF_PRO_LS_PRODUCT_ID 15
42 #define USB_LEAF_PRO_SWC_PRODUCT_ID 16
43 #define USB_LEAF_PRO_LIN_PRODUCT_ID 17
44 #define USB_LEAF_SPRO_LS_PRODUCT_ID 18
45 #define USB_LEAF_SPRO_SWC_PRODUCT_ID 19
46 #define USB_MEMO2_DEVEL_PRODUCT_ID 22
47 #define USB_MEMO2_HSHS_PRODUCT_ID 23
48 #define USB_UPRO_HSHS_PRODUCT_ID 24
49 #define USB_LEAF_LITE_GI_PRODUCT_ID 25
50 #define USB_LEAF_PRO_OBDII_PRODUCT_ID 26
51 #define USB_MEMO2_HSLS_PRODUCT_ID 27
52 #define USB_LEAF_LITE_CH_PRODUCT_ID 28
53 #define USB_BLACKBIRD_SPRO_PRODUCT_ID 29
54 #define USB_OEM_MERCURY_PRODUCT_ID 34
55 #define USB_OEM_LEAF_PRODUCT_ID 35
56 #define USB_CAN_R_PRODUCT_ID 39
57 #define USB_LEAF_LITE_V2_PRODUCT_ID 288
58 #define USB_MINI_PCIE_HS_PRODUCT_ID 289
59 #define USB_LEAF_LIGHT_HS_V2_OEM_PRODUCT_ID 290
60 #define USB_USBCAN_LIGHT_2HS_PRODUCT_ID 291
61 #define USB_MINI_PCIE_2HS_PRODUCT_ID 292
62 #define USB_USBCAN_R_V2_PRODUCT_ID 294
63 #define USB_LEAF_LIGHT_R_V2_PRODUCT_ID 295
64 #define USB_LEAF_LIGHT_HS_V2_OEM2_PRODUCT_ID 296
66 /* Kvaser USBCan-II devices product ids */
67 #define USB_USBCAN_REVB_PRODUCT_ID 2
68 #define USB_VCI2_PRODUCT_ID 3
69 #define USB_USBCAN2_PRODUCT_ID 4
70 #define USB_MEMORATOR_PRODUCT_ID 5
72 /* Kvaser Minihydra USB devices product ids */
73 #define USB_BLACKBIRD_V2_PRODUCT_ID 258
74 #define USB_MEMO_PRO_5HS_PRODUCT_ID 260
75 #define USB_USBCAN_PRO_5HS_PRODUCT_ID 261
76 #define USB_USBCAN_LIGHT_4HS_PRODUCT_ID 262
77 #define USB_LEAF_PRO_HS_V2_PRODUCT_ID 263
78 #define USB_USBCAN_PRO_2HS_V2_PRODUCT_ID 264
79 #define USB_MEMO_2HS_PRODUCT_ID 265
80 #define USB_MEMO_PRO_2HS_V2_PRODUCT_ID 266
81 #define USB_HYBRID_2CANLIN_PRODUCT_ID 267
82 #define USB_ATI_USBCAN_PRO_2HS_V2_PRODUCT_ID 268
83 #define USB_ATI_MEMO_PRO_2HS_V2_PRODUCT_ID 269
84 #define USB_HYBRID_PRO_2CANLIN_PRODUCT_ID 270
85 #define USB_U100_PRODUCT_ID 273
86 #define USB_U100P_PRODUCT_ID 274
87 #define USB_U100S_PRODUCT_ID 275
88 #define USB_USBCAN_PRO_4HS_PRODUCT_ID 276
89 #define USB_HYBRID_CANLIN_PRODUCT_ID 277
90 #define USB_HYBRID_PRO_CANLIN_PRODUCT_ID 278
92 static const struct kvaser_usb_driver_info kvaser_usb_driver_info_hydra = {
93 .quirks = KVASER_USB_QUIRK_HAS_HARDWARE_TIMESTAMP,
94 .ops = &kvaser_usb_hydra_dev_ops,
97 static const struct kvaser_usb_driver_info kvaser_usb_driver_info_usbcan = {
98 .quirks = KVASER_USB_QUIRK_HAS_TXRX_ERRORS |
99 KVASER_USB_QUIRK_HAS_SILENT_MODE,
100 .family = KVASER_USBCAN,
101 .ops = &kvaser_usb_leaf_dev_ops,
104 static const struct kvaser_usb_driver_info kvaser_usb_driver_info_leaf = {
105 .quirks = KVASER_USB_QUIRK_IGNORE_CLK_FREQ,
106 .family = KVASER_LEAF,
107 .ops = &kvaser_usb_leaf_dev_ops,
110 static const struct kvaser_usb_driver_info kvaser_usb_driver_info_leaf_err = {
111 .quirks = KVASER_USB_QUIRK_HAS_TXRX_ERRORS |
112 KVASER_USB_QUIRK_IGNORE_CLK_FREQ,
113 .family = KVASER_LEAF,
114 .ops = &kvaser_usb_leaf_dev_ops,
117 static const struct kvaser_usb_driver_info kvaser_usb_driver_info_leaf_err_listen = {
118 .quirks = KVASER_USB_QUIRK_HAS_TXRX_ERRORS |
119 KVASER_USB_QUIRK_HAS_SILENT_MODE |
120 KVASER_USB_QUIRK_IGNORE_CLK_FREQ,
121 .family = KVASER_LEAF,
122 .ops = &kvaser_usb_leaf_dev_ops,
125 static const struct kvaser_usb_driver_info kvaser_usb_driver_info_leafimx = {
127 .ops = &kvaser_usb_leaf_dev_ops,
130 static const struct usb_device_id kvaser_usb_table[] = {
131 /* Leaf M32C USB product IDs */
132 { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_DEVEL_PRODUCT_ID),
133 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_leaf },
134 { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_LITE_PRODUCT_ID),
135 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_leaf },
136 { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_PRO_PRODUCT_ID),
137 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_leaf_err_listen },
138 { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_SPRO_PRODUCT_ID),
139 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_leaf_err_listen },
140 { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_PRO_LS_PRODUCT_ID),
141 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_leaf_err_listen },
142 { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_PRO_SWC_PRODUCT_ID),
143 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_leaf_err_listen },
144 { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_PRO_LIN_PRODUCT_ID),
145 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_leaf_err_listen },
146 { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_SPRO_LS_PRODUCT_ID),
147 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_leaf_err_listen },
148 { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_SPRO_SWC_PRODUCT_ID),
149 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_leaf_err_listen },
150 { USB_DEVICE(KVASER_VENDOR_ID, USB_MEMO2_DEVEL_PRODUCT_ID),
151 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_leaf_err_listen },
152 { USB_DEVICE(KVASER_VENDOR_ID, USB_MEMO2_HSHS_PRODUCT_ID),
153 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_leaf_err_listen },
154 { USB_DEVICE(KVASER_VENDOR_ID, USB_UPRO_HSHS_PRODUCT_ID),
155 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_leaf_err },
156 { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_LITE_GI_PRODUCT_ID),
157 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_leaf },
158 { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_PRO_OBDII_PRODUCT_ID),
159 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_leaf_err_listen },
160 { USB_DEVICE(KVASER_VENDOR_ID, USB_MEMO2_HSLS_PRODUCT_ID),
161 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_leaf_err },
162 { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_LITE_CH_PRODUCT_ID),
163 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_leaf_err },
164 { USB_DEVICE(KVASER_VENDOR_ID, USB_BLACKBIRD_SPRO_PRODUCT_ID),
165 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_leaf_err },
166 { USB_DEVICE(KVASER_VENDOR_ID, USB_OEM_MERCURY_PRODUCT_ID),
167 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_leaf_err },
168 { USB_DEVICE(KVASER_VENDOR_ID, USB_OEM_LEAF_PRODUCT_ID),
169 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_leaf_err },
170 { USB_DEVICE(KVASER_VENDOR_ID, USB_CAN_R_PRODUCT_ID),
171 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_leaf_err },
173 /* Leaf i.MX28 USB product IDs */
174 { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_LITE_V2_PRODUCT_ID),
175 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_leafimx },
176 { USB_DEVICE(KVASER_VENDOR_ID, USB_MINI_PCIE_HS_PRODUCT_ID),
177 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_leafimx },
178 { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_LIGHT_HS_V2_OEM_PRODUCT_ID),
179 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_leafimx },
180 { USB_DEVICE(KVASER_VENDOR_ID, USB_USBCAN_LIGHT_2HS_PRODUCT_ID),
181 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_leafimx },
182 { USB_DEVICE(KVASER_VENDOR_ID, USB_MINI_PCIE_2HS_PRODUCT_ID),
183 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_leafimx },
184 { USB_DEVICE(KVASER_VENDOR_ID, USB_USBCAN_R_V2_PRODUCT_ID),
185 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_leafimx },
186 { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_LIGHT_R_V2_PRODUCT_ID),
187 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_leafimx },
188 { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_LIGHT_HS_V2_OEM2_PRODUCT_ID),
189 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_leafimx },
191 /* USBCANII USB product IDs */
192 { USB_DEVICE(KVASER_VENDOR_ID, USB_USBCAN2_PRODUCT_ID),
193 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_usbcan },
194 { USB_DEVICE(KVASER_VENDOR_ID, USB_USBCAN_REVB_PRODUCT_ID),
195 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_usbcan },
196 { USB_DEVICE(KVASER_VENDOR_ID, USB_MEMORATOR_PRODUCT_ID),
197 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_usbcan },
198 { USB_DEVICE(KVASER_VENDOR_ID, USB_VCI2_PRODUCT_ID),
199 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_usbcan },
201 /* Minihydra USB product IDs */
202 { USB_DEVICE(KVASER_VENDOR_ID, USB_BLACKBIRD_V2_PRODUCT_ID),
203 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_hydra },
204 { USB_DEVICE(KVASER_VENDOR_ID, USB_MEMO_PRO_5HS_PRODUCT_ID),
205 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_hydra },
206 { USB_DEVICE(KVASER_VENDOR_ID, USB_USBCAN_PRO_5HS_PRODUCT_ID),
207 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_hydra },
208 { USB_DEVICE(KVASER_VENDOR_ID, USB_USBCAN_LIGHT_4HS_PRODUCT_ID),
209 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_hydra },
210 { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_PRO_HS_V2_PRODUCT_ID),
211 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_hydra },
212 { USB_DEVICE(KVASER_VENDOR_ID, USB_USBCAN_PRO_2HS_V2_PRODUCT_ID),
213 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_hydra },
214 { USB_DEVICE(KVASER_VENDOR_ID, USB_MEMO_2HS_PRODUCT_ID),
215 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_hydra },
216 { USB_DEVICE(KVASER_VENDOR_ID, USB_MEMO_PRO_2HS_V2_PRODUCT_ID),
217 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_hydra },
218 { USB_DEVICE(KVASER_VENDOR_ID, USB_HYBRID_2CANLIN_PRODUCT_ID),
219 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_hydra },
220 { USB_DEVICE(KVASER_VENDOR_ID, USB_ATI_USBCAN_PRO_2HS_V2_PRODUCT_ID),
221 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_hydra },
222 { USB_DEVICE(KVASER_VENDOR_ID, USB_ATI_MEMO_PRO_2HS_V2_PRODUCT_ID),
223 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_hydra },
224 { USB_DEVICE(KVASER_VENDOR_ID, USB_HYBRID_PRO_2CANLIN_PRODUCT_ID),
225 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_hydra },
226 { USB_DEVICE(KVASER_VENDOR_ID, USB_U100_PRODUCT_ID),
227 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_hydra },
228 { USB_DEVICE(KVASER_VENDOR_ID, USB_U100P_PRODUCT_ID),
229 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_hydra },
230 { USB_DEVICE(KVASER_VENDOR_ID, USB_U100S_PRODUCT_ID),
231 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_hydra },
232 { USB_DEVICE(KVASER_VENDOR_ID, USB_USBCAN_PRO_4HS_PRODUCT_ID),
233 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_hydra },
234 { USB_DEVICE(KVASER_VENDOR_ID, USB_HYBRID_CANLIN_PRODUCT_ID),
235 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_hydra },
236 { USB_DEVICE(KVASER_VENDOR_ID, USB_HYBRID_PRO_CANLIN_PRODUCT_ID),
237 .driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_hydra },
240 MODULE_DEVICE_TABLE(usb, kvaser_usb_table);
242 int kvaser_usb_send_cmd(const struct kvaser_usb *dev, void *cmd, int len)
244 return usb_bulk_msg(dev->udev,
245 usb_sndbulkpipe(dev->udev,
246 dev->bulk_out->bEndpointAddress),
247 cmd, len, NULL, KVASER_USB_TIMEOUT);
250 int kvaser_usb_recv_cmd(const struct kvaser_usb *dev, void *cmd, int len,
253 return usb_bulk_msg(dev->udev,
254 usb_rcvbulkpipe(dev->udev,
255 dev->bulk_in->bEndpointAddress),
256 cmd, len, actual_len, KVASER_USB_TIMEOUT);
259 static void kvaser_usb_send_cmd_callback(struct urb *urb)
261 struct net_device *netdev = urb->context;
263 kfree(urb->transfer_buffer);
266 netdev_warn(netdev, "urb status received: %d\n", urb->status);
269 int kvaser_usb_send_cmd_async(struct kvaser_usb_net_priv *priv, void *cmd,
272 struct kvaser_usb *dev = priv->dev;
273 struct net_device *netdev = priv->netdev;
277 urb = usb_alloc_urb(0, GFP_ATOMIC);
281 usb_fill_bulk_urb(urb, dev->udev,
282 usb_sndbulkpipe(dev->udev,
283 dev->bulk_out->bEndpointAddress),
284 cmd, len, kvaser_usb_send_cmd_callback, netdev);
285 usb_anchor_urb(urb, &priv->tx_submitted);
287 err = usb_submit_urb(urb, GFP_ATOMIC);
289 netdev_err(netdev, "Error transmitting URB\n");
290 usb_unanchor_urb(urb);
297 int kvaser_usb_can_rx_over_error(struct net_device *netdev)
299 struct net_device_stats *stats = &netdev->stats;
300 struct can_frame *cf;
303 stats->rx_over_errors++;
306 skb = alloc_can_err_skb(netdev, &cf);
309 netdev_warn(netdev, "No memory left for err_skb\n");
313 cf->can_id |= CAN_ERR_CRTL;
314 cf->data[1] = CAN_ERR_CRTL_RX_OVERFLOW;
321 static void kvaser_usb_read_bulk_callback(struct urb *urb)
323 struct kvaser_usb *dev = urb->context;
324 const struct kvaser_usb_dev_ops *ops = dev->driver_info->ops;
328 switch (urb->status) {
337 dev_info(&dev->intf->dev, "Rx URB aborted (%d)\n", urb->status);
341 ops->dev_read_bulk_callback(dev, urb->transfer_buffer,
345 usb_fill_bulk_urb(urb, dev->udev,
346 usb_rcvbulkpipe(dev->udev,
347 dev->bulk_in->bEndpointAddress),
348 urb->transfer_buffer, KVASER_USB_RX_BUFFER_SIZE,
349 kvaser_usb_read_bulk_callback, dev);
351 err = usb_submit_urb(urb, GFP_ATOMIC);
352 if (err == -ENODEV) {
353 for (i = 0; i < dev->nchannels; i++) {
357 netif_device_detach(dev->nets[i]->netdev);
360 dev_err(&dev->intf->dev,
361 "Failed resubmitting read bulk urb: %d\n", err);
365 static int kvaser_usb_setup_rx_urbs(struct kvaser_usb *dev)
372 for (i = 0; i < KVASER_USB_MAX_RX_URBS; i++) {
373 struct urb *urb = NULL;
377 urb = usb_alloc_urb(0, GFP_KERNEL);
383 buf = usb_alloc_coherent(dev->udev, KVASER_USB_RX_BUFFER_SIZE,
384 GFP_KERNEL, &buf_dma);
386 dev_warn(&dev->intf->dev,
387 "No memory left for USB buffer\n");
393 usb_fill_bulk_urb(urb, dev->udev,
396 dev->bulk_in->bEndpointAddress),
397 buf, KVASER_USB_RX_BUFFER_SIZE,
398 kvaser_usb_read_bulk_callback, dev);
399 urb->transfer_dma = buf_dma;
400 urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
401 usb_anchor_urb(urb, &dev->rx_submitted);
403 err = usb_submit_urb(urb, GFP_KERNEL);
405 usb_unanchor_urb(urb);
406 usb_free_coherent(dev->udev,
407 KVASER_USB_RX_BUFFER_SIZE, buf,
414 dev->rxbuf_dma[i] = buf_dma;
420 dev_warn(&dev->intf->dev, "Cannot setup read URBs, error %d\n",
423 } else if (i < KVASER_USB_MAX_RX_URBS) {
424 dev_warn(&dev->intf->dev, "RX performances may be slow\n");
427 dev->rxinitdone = true;
432 static int kvaser_usb_open(struct net_device *netdev)
434 struct kvaser_usb_net_priv *priv = netdev_priv(netdev);
435 struct kvaser_usb *dev = priv->dev;
436 const struct kvaser_usb_dev_ops *ops = dev->driver_info->ops;
439 err = open_candev(netdev);
443 err = ops->dev_set_opt_mode(priv);
447 err = ops->dev_start_chip(priv);
449 netdev_warn(netdev, "Cannot start device, error %d\n", err);
453 priv->can.state = CAN_STATE_ERROR_ACTIVE;
458 close_candev(netdev);
462 static void kvaser_usb_reset_tx_urb_contexts(struct kvaser_usb_net_priv *priv)
466 max_tx_urbs = priv->dev->max_tx_urbs;
468 priv->active_tx_contexts = 0;
469 for (i = 0; i < max_tx_urbs; i++)
470 priv->tx_contexts[i].echo_index = max_tx_urbs;
473 /* This method might sleep. Do not call it in the atomic context
474 * of URB completions.
476 void kvaser_usb_unlink_tx_urbs(struct kvaser_usb_net_priv *priv)
478 usb_kill_anchored_urbs(&priv->tx_submitted);
479 kvaser_usb_reset_tx_urb_contexts(priv);
482 static void kvaser_usb_unlink_all_urbs(struct kvaser_usb *dev)
486 usb_kill_anchored_urbs(&dev->rx_submitted);
488 for (i = 0; i < KVASER_USB_MAX_RX_URBS; i++)
489 usb_free_coherent(dev->udev, KVASER_USB_RX_BUFFER_SIZE,
490 dev->rxbuf[i], dev->rxbuf_dma[i]);
492 for (i = 0; i < dev->nchannels; i++) {
493 struct kvaser_usb_net_priv *priv = dev->nets[i];
496 kvaser_usb_unlink_tx_urbs(priv);
500 static int kvaser_usb_close(struct net_device *netdev)
502 struct kvaser_usb_net_priv *priv = netdev_priv(netdev);
503 struct kvaser_usb *dev = priv->dev;
504 const struct kvaser_usb_dev_ops *ops = dev->driver_info->ops;
507 netif_stop_queue(netdev);
509 err = ops->dev_flush_queue(priv);
511 netdev_warn(netdev, "Cannot flush queue, error %d\n", err);
513 if (ops->dev_reset_chip) {
514 err = ops->dev_reset_chip(dev, priv->channel);
516 netdev_warn(netdev, "Cannot reset card, error %d\n",
520 err = ops->dev_stop_chip(priv);
522 netdev_warn(netdev, "Cannot stop device, error %d\n", err);
524 /* reset tx contexts */
525 kvaser_usb_unlink_tx_urbs(priv);
527 priv->can.state = CAN_STATE_STOPPED;
528 close_candev(priv->netdev);
533 static int kvaser_usb_set_bittiming(struct net_device *netdev)
535 struct kvaser_usb_net_priv *priv = netdev_priv(netdev);
536 struct kvaser_usb *dev = priv->dev;
537 const struct kvaser_usb_dev_ops *ops = dev->driver_info->ops;
538 struct can_bittiming *bt = &priv->can.bittiming;
540 struct kvaser_usb_busparams busparams;
541 int tseg1 = bt->prop_seg + bt->phase_seg1;
542 int tseg2 = bt->phase_seg2;
546 busparams.bitrate = cpu_to_le32(bt->bitrate);
547 busparams.sjw = (u8)sjw;
548 busparams.tseg1 = (u8)tseg1;
549 busparams.tseg2 = (u8)tseg2;
550 if (priv->can.ctrlmode & CAN_CTRLMODE_3_SAMPLES)
551 busparams.nsamples = 3;
553 busparams.nsamples = 1;
555 err = ops->dev_set_bittiming(netdev, &busparams);
559 err = kvaser_usb_setup_rx_urbs(priv->dev);
563 err = ops->dev_get_busparams(priv);
565 /* Treat EOPNOTSUPP as success */
566 if (err == -EOPNOTSUPP)
571 if (memcmp(&busparams, &priv->busparams_nominal,
572 sizeof(priv->busparams_nominal)) != 0)
578 static int kvaser_usb_set_data_bittiming(struct net_device *netdev)
580 struct kvaser_usb_net_priv *priv = netdev_priv(netdev);
581 struct kvaser_usb *dev = priv->dev;
582 const struct kvaser_usb_dev_ops *ops = dev->driver_info->ops;
583 struct can_bittiming *dbt = &priv->can.data_bittiming;
585 struct kvaser_usb_busparams busparams;
586 int tseg1 = dbt->prop_seg + dbt->phase_seg1;
587 int tseg2 = dbt->phase_seg2;
591 if (!ops->dev_set_data_bittiming ||
592 !ops->dev_get_data_busparams)
595 busparams.bitrate = cpu_to_le32(dbt->bitrate);
596 busparams.sjw = (u8)sjw;
597 busparams.tseg1 = (u8)tseg1;
598 busparams.tseg2 = (u8)tseg2;
599 busparams.nsamples = 1;
601 err = ops->dev_set_data_bittiming(netdev, &busparams);
605 err = kvaser_usb_setup_rx_urbs(priv->dev);
609 err = ops->dev_get_data_busparams(priv);
613 if (memcmp(&busparams, &priv->busparams_data,
614 sizeof(priv->busparams_data)) != 0)
620 static void kvaser_usb_write_bulk_callback(struct urb *urb)
622 struct kvaser_usb_tx_urb_context *context = urb->context;
623 struct kvaser_usb_net_priv *priv;
624 struct net_device *netdev;
626 if (WARN_ON(!context))
629 priv = context->priv;
630 netdev = priv->netdev;
632 kfree(urb->transfer_buffer);
634 if (!netif_device_present(netdev))
638 netdev_info(netdev, "Tx URB aborted (%d)\n", urb->status);
641 static netdev_tx_t kvaser_usb_start_xmit(struct sk_buff *skb,
642 struct net_device *netdev)
644 struct kvaser_usb_net_priv *priv = netdev_priv(netdev);
645 struct kvaser_usb *dev = priv->dev;
646 const struct kvaser_usb_dev_ops *ops = dev->driver_info->ops;
647 struct net_device_stats *stats = &netdev->stats;
648 struct kvaser_usb_tx_urb_context *context = NULL;
652 int err, ret = NETDEV_TX_OK;
656 if (can_dev_dropped_skb(netdev, skb))
659 urb = usb_alloc_urb(0, GFP_ATOMIC);
666 spin_lock_irqsave(&priv->tx_contexts_lock, flags);
667 for (i = 0; i < dev->max_tx_urbs; i++) {
668 if (priv->tx_contexts[i].echo_index == dev->max_tx_urbs) {
669 context = &priv->tx_contexts[i];
671 context->echo_index = i;
672 ++priv->active_tx_contexts;
673 if (priv->active_tx_contexts >= (int)dev->max_tx_urbs)
674 netif_stop_queue(netdev);
679 spin_unlock_irqrestore(&priv->tx_contexts_lock, flags);
681 /* This should never happen; it implies a flow control bug */
683 netdev_warn(netdev, "cannot find free context\n");
685 ret = NETDEV_TX_BUSY;
689 buf = ops->dev_frame_to_cmd(priv, skb, &cmd_len, context->echo_index);
693 spin_lock_irqsave(&priv->tx_contexts_lock, flags);
695 context->echo_index = dev->max_tx_urbs;
696 --priv->active_tx_contexts;
697 netif_wake_queue(netdev);
699 spin_unlock_irqrestore(&priv->tx_contexts_lock, flags);
703 context->priv = priv;
705 can_put_echo_skb(skb, netdev, context->echo_index, 0);
707 usb_fill_bulk_urb(urb, dev->udev,
708 usb_sndbulkpipe(dev->udev,
709 dev->bulk_out->bEndpointAddress),
710 buf, cmd_len, kvaser_usb_write_bulk_callback,
712 usb_anchor_urb(urb, &priv->tx_submitted);
714 err = usb_submit_urb(urb, GFP_ATOMIC);
716 spin_lock_irqsave(&priv->tx_contexts_lock, flags);
718 can_free_echo_skb(netdev, context->echo_index, NULL);
719 context->echo_index = dev->max_tx_urbs;
720 --priv->active_tx_contexts;
721 netif_wake_queue(netdev);
723 spin_unlock_irqrestore(&priv->tx_contexts_lock, flags);
725 usb_unanchor_urb(urb);
731 netif_device_detach(netdev);
733 netdev_warn(netdev, "Failed tx_urb %d\n", err);
745 static const struct net_device_ops kvaser_usb_netdev_ops = {
746 .ndo_open = kvaser_usb_open,
747 .ndo_stop = kvaser_usb_close,
748 .ndo_start_xmit = kvaser_usb_start_xmit,
749 .ndo_change_mtu = can_change_mtu,
752 static const struct net_device_ops kvaser_usb_netdev_ops_hwts = {
753 .ndo_open = kvaser_usb_open,
754 .ndo_stop = kvaser_usb_close,
755 .ndo_eth_ioctl = can_eth_ioctl_hwts,
756 .ndo_start_xmit = kvaser_usb_start_xmit,
757 .ndo_change_mtu = can_change_mtu,
760 static const struct ethtool_ops kvaser_usb_ethtool_ops = {
761 .get_ts_info = ethtool_op_get_ts_info,
764 static const struct ethtool_ops kvaser_usb_ethtool_ops_hwts = {
765 .get_ts_info = can_ethtool_op_get_ts_info_hwts,
768 static void kvaser_usb_remove_interfaces(struct kvaser_usb *dev)
770 const struct kvaser_usb_dev_ops *ops = dev->driver_info->ops;
773 for (i = 0; i < dev->nchannels; i++) {
777 unregister_candev(dev->nets[i]->netdev);
780 kvaser_usb_unlink_all_urbs(dev);
782 for (i = 0; i < dev->nchannels; i++) {
786 if (ops->dev_remove_channel)
787 ops->dev_remove_channel(dev->nets[i]);
789 free_candev(dev->nets[i]->netdev);
793 static int kvaser_usb_init_one(struct kvaser_usb *dev, int channel)
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;
801 if (ops->dev_reset_chip) {
802 err = ops->dev_reset_chip(dev, channel);
807 netdev = alloc_candev(struct_size(priv, tx_contexts, dev->max_tx_urbs),
810 dev_err(&dev->intf->dev, "Cannot alloc candev\n");
814 priv = netdev_priv(netdev);
816 init_usb_anchor(&priv->tx_submitted);
817 init_completion(&priv->start_comp);
818 init_completion(&priv->stop_comp);
819 init_completion(&priv->flush_comp);
820 init_completion(&priv->get_busparams_comp);
821 priv->can.ctrlmode_supported = 0;
824 priv->netdev = netdev;
825 priv->channel = channel;
827 spin_lock_init(&priv->tx_contexts_lock);
828 kvaser_usb_reset_tx_urb_contexts(priv);
830 priv->can.state = CAN_STATE_STOPPED;
831 priv->can.clock.freq = dev->cfg->clock.freq;
832 priv->can.bittiming_const = dev->cfg->bittiming_const;
833 priv->can.do_set_bittiming = kvaser_usb_set_bittiming;
834 priv->can.do_set_mode = ops->dev_set_mode;
835 if ((driver_info->quirks & KVASER_USB_QUIRK_HAS_TXRX_ERRORS) ||
836 (priv->dev->card_data.capabilities & KVASER_USB_CAP_BERR_CAP))
837 priv->can.do_get_berr_counter = ops->dev_get_berr_counter;
838 if (driver_info->quirks & KVASER_USB_QUIRK_HAS_SILENT_MODE)
839 priv->can.ctrlmode_supported |= CAN_CTRLMODE_LISTENONLY;
841 priv->can.ctrlmode_supported |= dev->card_data.ctrlmode_supported;
843 if (priv->can.ctrlmode_supported & CAN_CTRLMODE_FD) {
844 priv->can.data_bittiming_const = dev->cfg->data_bittiming_const;
845 priv->can.do_set_data_bittiming = kvaser_usb_set_data_bittiming;
848 netdev->flags |= IFF_ECHO;
850 netdev->netdev_ops = &kvaser_usb_netdev_ops;
851 if (driver_info->quirks & KVASER_USB_QUIRK_HAS_HARDWARE_TIMESTAMP) {
852 netdev->netdev_ops = &kvaser_usb_netdev_ops_hwts;
853 netdev->ethtool_ops = &kvaser_usb_ethtool_ops_hwts;
855 netdev->netdev_ops = &kvaser_usb_netdev_ops;
856 netdev->ethtool_ops = &kvaser_usb_ethtool_ops;
858 SET_NETDEV_DEV(netdev, &dev->intf->dev);
859 netdev->dev_id = channel;
861 dev->nets[channel] = priv;
863 if (ops->dev_init_channel) {
864 err = ops->dev_init_channel(priv);
869 err = register_candev(netdev);
871 dev_err(&dev->intf->dev, "Failed to register CAN device\n");
875 netdev_dbg(netdev, "device registered\n");
881 dev->nets[channel] = NULL;
885 static int kvaser_usb_probe(struct usb_interface *intf,
886 const struct usb_device_id *id)
888 struct kvaser_usb *dev;
891 const struct kvaser_usb_driver_info *driver_info;
892 const struct kvaser_usb_dev_ops *ops;
894 driver_info = (const struct kvaser_usb_driver_info *)id->driver_info;
898 dev = devm_kzalloc(&intf->dev, sizeof(*dev), GFP_KERNEL);
903 dev->driver_info = driver_info;
904 ops = driver_info->ops;
906 err = ops->dev_setup_endpoints(dev);
908 dev_err(&intf->dev, "Cannot get usb endpoint(s)");
912 dev->udev = interface_to_usbdev(intf);
914 init_usb_anchor(&dev->rx_submitted);
916 usb_set_intfdata(intf, dev);
918 dev->card_data.ctrlmode_supported = 0;
919 dev->card_data.capabilities = 0;
920 err = ops->dev_init_card(dev);
923 "Failed to initialize card, error %d\n", err);
927 err = ops->dev_get_software_info(dev);
930 "Cannot get software info, error %d\n", err);
934 if (ops->dev_get_software_details) {
935 err = ops->dev_get_software_details(dev);
938 "Cannot get software details, error %d\n", err);
943 if (WARN_ON(!dev->cfg))
946 dev_dbg(&intf->dev, "Firmware version: %d.%d.%d\n",
947 ((dev->fw_version >> 24) & 0xff),
948 ((dev->fw_version >> 16) & 0xff),
949 (dev->fw_version & 0xffff));
951 dev_dbg(&intf->dev, "Max outstanding tx = %d URBs\n", dev->max_tx_urbs);
953 err = ops->dev_get_card_info(dev);
955 dev_err(&intf->dev, "Cannot get card info, error %d\n", err);
959 if (ops->dev_get_capabilities) {
960 err = ops->dev_get_capabilities(dev);
963 "Cannot get capabilities, error %d\n", err);
964 kvaser_usb_remove_interfaces(dev);
969 for (i = 0; i < dev->nchannels; i++) {
970 err = kvaser_usb_init_one(dev, i);
972 kvaser_usb_remove_interfaces(dev);
980 static void kvaser_usb_disconnect(struct usb_interface *intf)
982 struct kvaser_usb *dev = usb_get_intfdata(intf);
984 usb_set_intfdata(intf, NULL);
989 kvaser_usb_remove_interfaces(dev);
992 static struct usb_driver kvaser_usb_driver = {
993 .name = KBUILD_MODNAME,
994 .probe = kvaser_usb_probe,
995 .disconnect = kvaser_usb_disconnect,
996 .id_table = kvaser_usb_table,
999 module_usb_driver(kvaser_usb_driver);
1001 MODULE_AUTHOR("Olivier Sobrie <olivier@sobrie.be>");
1002 MODULE_AUTHOR("Kvaser AB <support@kvaser.com>");
1003 MODULE_DESCRIPTION("CAN driver for Kvaser CAN/USB devices");
1004 MODULE_LICENSE("GPL v2");