1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * CAN driver for PEAK System PCAN-USB FD / PCAN-USB Pro FD adapter
4 *
5 * Copyright (C) 2013-2025 PEAK System-Technik GmbH
6 * Author: Stéphane Grosjean <stephane.grosjean@hms-networks.com>
7 */
8 #include <linux/ethtool.h>
9 #include <linux/module.h>
10 #include <linux/netdevice.h>
11 #include <linux/usb.h>
12
13 #include <linux/can.h>
14 #include <linux/can/dev.h>
15 #include <linux/can/error.h>
16 #include <linux/can/dev/peak_canfd.h>
17
18 #include "pcan_usb_core.h"
19 #include "pcan_usb_pro.h"
20
21 #define PCAN_USBPROFD_CHANNEL_COUNT 2
22 #define PCAN_USBFD_CHANNEL_COUNT 1
23
24 /* PCAN-USB Pro FD adapter internal clock (Hz) */
25 #define PCAN_UFD_CRYSTAL_HZ 80000000
26
27 #define PCAN_UFD_CMD_BUFFER_SIZE 512
28 #define PCAN_UFD_LOSPD_PKT_SIZE 64
29
30 /* PCAN-USB Pro FD command timeout (ms.) */
31 #define PCAN_UFD_CMD_TIMEOUT_MS 1000
32
33 /* PCAN-USB Pro FD rx/tx buffers size */
34 #define PCAN_UFD_RX_BUFFER_SIZE 2048
35 #define PCAN_UFD_TX_BUFFER_SIZE 512
36
37 /* struct pcan_ufd_fw_info::type */
38 #define PCAN_USBFD_TYPE_STD 1
39 #define PCAN_USBFD_TYPE_EXT 2 /* includes EP numbers */
40
41 /* read some versions info from the hw device */
42 struct __packed pcan_ufd_fw_info {
43 __le16 size_of; /* sizeof this */
44 __le16 type; /* type of this structure */
45 u8 hw_type; /* Type of hardware (HW_TYPE_xxx) */
46 u8 bl_version[3]; /* Bootloader version */
47 u8 hw_version; /* Hardware version (PCB) */
48 u8 fw_version[3]; /* Firmware version */
49 __le32 dev_id[2]; /* "device id" per CAN */
50 __le32 ser_no; /* S/N */
51 __le32 flags; /* special functions */
52
53 /* extended data when type >= PCAN_USBFD_TYPE_EXT */
54 u8 cmd_out_ep; /* ep for cmd */
55 u8 cmd_in_ep; /* ep for replies */
56 u8 data_out_ep[2]; /* ep for CANx TX */
57 u8 data_in_ep; /* ep for CAN RX */
58 u8 dummy[3];
59 };
60
61 /* handle device specific info used by the netdevices */
62 struct pcan_usb_fd_if {
63 struct peak_usb_device *dev[PCAN_USB_MAX_CHANNEL];
64 struct pcan_ufd_fw_info fw_info;
65 struct peak_time_ref time_ref;
66 int cm_ignore_count;
67 int dev_opened_count;
68 };
69
70 /* device information */
71 struct pcan_usb_fd_device {
72 struct peak_usb_device dev;
73 struct can_berr_counter bec;
74 struct pcan_usb_fd_if *usb_if;
75 u8 *cmd_buffer_addr;
76 };
77
78 /* Extended USB commands (non uCAN commands) */
79
80 /* Clock Modes command */
81 #define PCAN_UFD_CMD_CLK_SET 0x80
82
83 #define PCAN_UFD_CLK_80MHZ 0x0
84 #define PCAN_UFD_CLK_60MHZ 0x1
85 #define PCAN_UFD_CLK_40MHZ 0x2
86 #define PCAN_UFD_CLK_30MHZ 0x3
87 #define PCAN_UFD_CLK_24MHZ 0x4
88 #define PCAN_UFD_CLK_20MHZ 0x5
89 #define PCAN_UFD_CLK_DEF PCAN_UFD_CLK_80MHZ
90
91 struct __packed pcan_ufd_clock {
92 __le16 opcode_channel;
93
94 u8 mode;
95 u8 unused[5];
96 };
97
98 /* LED control command */
99 #define PCAN_UFD_CMD_LED_SET 0x86
100
101 #define PCAN_UFD_LED_DEV 0x00
102 #define PCAN_UFD_LED_FAST 0x01
103 #define PCAN_UFD_LED_SLOW 0x02
104 #define PCAN_UFD_LED_ON 0x03
105 #define PCAN_UFD_LED_OFF 0x04
106 #define PCAN_UFD_LED_DEF PCAN_UFD_LED_DEV
107
108 struct __packed pcan_ufd_led {
109 __le16 opcode_channel;
110
111 u8 mode;
112 u8 unused[5];
113 };
114
115 /* Extended usage of uCAN commands CMD_xxx_xx_OPTION for PCAN-USB Pro FD */
116 #define PCAN_UFD_FLTEXT_CALIBRATION 0x8000
117
118 struct __packed pcan_ufd_options {
119 __le16 opcode_channel;
120
121 __le16 ucan_mask;
122 u16 unused;
123 __le16 usb_mask;
124 };
125
126 /* Extended usage of uCAN messages for PCAN-USB Pro FD */
127 #define PCAN_UFD_MSG_CALIBRATION 0x100
128
129 struct __packed pcan_ufd_ts_msg {
130 __le16 size;
131 __le16 type;
132 __le32 ts_low;
133 __le32 ts_high;
134 __le16 usb_frame_index;
135 u16 unused;
136 };
137
138 #define PCAN_UFD_MSG_OVERRUN 0x101
139
140 #define PCAN_UFD_OVMSG_CHANNEL(o) ((o)->channel & 0xf)
141
142 struct __packed pcan_ufd_ovr_msg {
143 __le16 size;
144 __le16 type;
145 __le32 ts_low;
146 __le32 ts_high;
147 u8 channel;
148 u8 unused[3];
149 };
150
151 #define PCAN_UFD_CMD_DEVID_SET 0x81
152
153 struct __packed pcan_ufd_device_id {
154 __le16 opcode_channel;
155
156 u16 unused;
157 __le32 device_id;
158 };
159
pufd_omsg_get_channel(struct pcan_ufd_ovr_msg * om)160 static inline int pufd_omsg_get_channel(struct pcan_ufd_ovr_msg *om)
161 {
162 return om->channel & 0xf;
163 }
164
165 /* Clock mode frequency values */
166 static const u32 pcan_usb_fd_clk_freq[6] = {
167 [PCAN_UFD_CLK_80MHZ] = 80000000,
168 [PCAN_UFD_CLK_60MHZ] = 60000000,
169 [PCAN_UFD_CLK_40MHZ] = 40000000,
170 [PCAN_UFD_CLK_30MHZ] = 30000000,
171 [PCAN_UFD_CLK_24MHZ] = 24000000,
172 [PCAN_UFD_CLK_20MHZ] = 20000000
173 };
174
175 /* return a device USB interface */
176 static inline
pcan_usb_fd_dev_if(struct peak_usb_device * dev)177 struct pcan_usb_fd_if *pcan_usb_fd_dev_if(struct peak_usb_device *dev)
178 {
179 struct pcan_usb_fd_device *pdev =
180 container_of(dev, struct pcan_usb_fd_device, dev);
181 return pdev->usb_if;
182 }
183
184 /* return a device USB commands buffer */
pcan_usb_fd_cmd_buffer(struct peak_usb_device * dev)185 static inline void *pcan_usb_fd_cmd_buffer(struct peak_usb_device *dev)
186 {
187 struct pcan_usb_fd_device *pdev =
188 container_of(dev, struct pcan_usb_fd_device, dev);
189 return pdev->cmd_buffer_addr;
190 }
191
192 /* send PCAN-USB Pro FD commands synchronously */
pcan_usb_fd_send_cmd(struct peak_usb_device * dev,void * cmd_tail)193 static int pcan_usb_fd_send_cmd(struct peak_usb_device *dev, void *cmd_tail)
194 {
195 struct pcan_usb_fd_device *pdev =
196 container_of(dev, struct pcan_usb_fd_device, dev);
197 struct pcan_ufd_fw_info *fw_info = &pdev->usb_if->fw_info;
198 void *cmd_head = pcan_usb_fd_cmd_buffer(dev);
199 int err = 0;
200 u8 *packet_ptr;
201 int packet_len;
202 ptrdiff_t cmd_len;
203
204 /* usb device unregistered? */
205 if (!(dev->state & PCAN_USB_STATE_CONNECTED))
206 return 0;
207
208 /* if a packet is not filled completely by commands, the command list
209 * is terminated with an "end of collection" record.
210 */
211 cmd_len = cmd_tail - cmd_head;
212 if (cmd_len <= (PCAN_UFD_CMD_BUFFER_SIZE - sizeof(u64))) {
213 memset(cmd_tail, 0xff, sizeof(u64));
214 cmd_len += sizeof(u64);
215 }
216
217 packet_ptr = cmd_head;
218 packet_len = cmd_len;
219
220 /* firmware is not able to re-assemble 512 bytes buffer in full-speed */
221 if (unlikely(dev->udev->speed != USB_SPEED_HIGH))
222 packet_len = min(packet_len, PCAN_UFD_LOSPD_PKT_SIZE);
223
224 do {
225 err = usb_bulk_msg(dev->udev,
226 usb_sndbulkpipe(dev->udev,
227 fw_info->cmd_out_ep),
228 packet_ptr, packet_len,
229 NULL, PCAN_UFD_CMD_TIMEOUT_MS);
230 if (err) {
231 netdev_err(dev->netdev,
232 "sending command failure: %d\n", err);
233 break;
234 }
235
236 packet_ptr += packet_len;
237 cmd_len -= packet_len;
238
239 if (cmd_len < PCAN_UFD_LOSPD_PKT_SIZE)
240 packet_len = cmd_len;
241
242 } while (packet_len > 0);
243
244 return err;
245 }
246
pcan_usb_fd_read_fwinfo(struct peak_usb_device * dev,struct pcan_ufd_fw_info * fw_info)247 static int pcan_usb_fd_read_fwinfo(struct peak_usb_device *dev,
248 struct pcan_ufd_fw_info *fw_info)
249 {
250 return pcan_usb_pro_send_req(dev, PCAN_USBPRO_REQ_INFO,
251 PCAN_USBPRO_INFO_FW,
252 fw_info,
253 sizeof(*fw_info));
254 }
255
256 /* build the commands list in the given buffer, to enter operational mode */
pcan_usb_fd_build_restart_cmd(struct peak_usb_device * dev,u8 * buf)257 static int pcan_usb_fd_build_restart_cmd(struct peak_usb_device *dev, u8 *buf)
258 {
259 struct pucan_wr_err_cnt *prc;
260 struct pucan_command *cmd;
261 u8 *pc = buf;
262
263 /* 1st, reset error counters: */
264 prc = (struct pucan_wr_err_cnt *)pc;
265 prc->opcode_channel = pucan_cmd_opcode_channel(dev->ctrl_idx,
266 PUCAN_CMD_WR_ERR_CNT);
267
268 /* select both counters */
269 prc->sel_mask = cpu_to_le16(PUCAN_WRERRCNT_TE|PUCAN_WRERRCNT_RE);
270
271 /* and reset their values */
272 prc->tx_counter = 0;
273 prc->rx_counter = 0;
274
275 /* moves the pointer forward */
276 pc += sizeof(struct pucan_wr_err_cnt);
277
278 /* add command to switch from ISO to non-ISO mode, if fw allows it */
279 if (dev->can.ctrlmode_supported & CAN_CTRLMODE_FD_NON_ISO) {
280 struct pucan_options *puo = (struct pucan_options *)pc;
281
282 puo->opcode_channel =
283 (dev->can.ctrlmode & CAN_CTRLMODE_FD_NON_ISO) ?
284 pucan_cmd_opcode_channel(dev->ctrl_idx,
285 PUCAN_CMD_CLR_DIS_OPTION) :
286 pucan_cmd_opcode_channel(dev->ctrl_idx,
287 PUCAN_CMD_SET_EN_OPTION);
288
289 puo->options = cpu_to_le16(PUCAN_OPTION_CANDFDISO);
290
291 /* to be sure that no other extended bits will be taken into
292 * account
293 */
294 puo->unused = 0;
295
296 /* moves the pointer forward */
297 pc += sizeof(struct pucan_options);
298 }
299
300 /* next, go back to operational mode */
301 cmd = (struct pucan_command *)pc;
302 cmd->opcode_channel = pucan_cmd_opcode_channel(dev->ctrl_idx,
303 (dev->can.ctrlmode & CAN_CTRLMODE_LISTENONLY) ?
304 PUCAN_CMD_LISTEN_ONLY_MODE :
305 PUCAN_CMD_NORMAL_MODE);
306 pc += sizeof(struct pucan_command);
307
308 return pc - buf;
309 }
310
311 /* set CAN bus on/off */
pcan_usb_fd_set_bus(struct peak_usb_device * dev,u8 onoff)312 static int pcan_usb_fd_set_bus(struct peak_usb_device *dev, u8 onoff)
313 {
314 u8 *pc = pcan_usb_fd_cmd_buffer(dev);
315 int l;
316
317 if (onoff) {
318 /* build the cmds list to enter operational mode */
319 l = pcan_usb_fd_build_restart_cmd(dev, pc);
320 } else {
321 struct pucan_command *cmd = (struct pucan_command *)pc;
322
323 /* build cmd to go back to reset mode */
324 cmd->opcode_channel = pucan_cmd_opcode_channel(dev->ctrl_idx,
325 PUCAN_CMD_RESET_MODE);
326 l = sizeof(struct pucan_command);
327 }
328
329 /* send the command */
330 return pcan_usb_fd_send_cmd(dev, pc + l);
331 }
332
333 /* set filtering masks:
334 *
335 * idx in range [0..63] selects a row #idx, all rows otherwise
336 * mask in range [0..0xffffffff] defines up to 32 CANIDs in the row(s)
337 *
338 * Each bit of this 64 x 32 bits array defines a CANID value:
339 *
340 * bit[i,j] = 1 implies that CANID=(i x 32)+j will be received, while
341 * bit[i,j] = 0 implies that CANID=(i x 32)+j will be discarded.
342 */
pcan_usb_fd_set_filter_std(struct peak_usb_device * dev,int idx,u32 mask)343 static int pcan_usb_fd_set_filter_std(struct peak_usb_device *dev, int idx,
344 u32 mask)
345 {
346 struct pucan_filter_std *cmd = pcan_usb_fd_cmd_buffer(dev);
347 int i, n;
348
349 /* select all rows when idx is out of range [0..63] */
350 if ((idx < 0) || (idx >= (1 << PUCAN_FLTSTD_ROW_IDX_BITS))) {
351 n = 1 << PUCAN_FLTSTD_ROW_IDX_BITS;
352 idx = 0;
353
354 /* select the row (and only the row) otherwise */
355 } else {
356 n = idx + 1;
357 }
358
359 for (i = idx; i < n; i++, cmd++) {
360 cmd->opcode_channel = pucan_cmd_opcode_channel(dev->ctrl_idx,
361 PUCAN_CMD_FILTER_STD);
362 cmd->idx = cpu_to_le16(i);
363 cmd->mask = cpu_to_le32(mask);
364 }
365
366 /* send the command */
367 return pcan_usb_fd_send_cmd(dev, cmd);
368 }
369
370 /* set/unset options
371 *
372 * onoff set(1)/unset(0) options
373 * mask each bit defines a kind of options to set/unset
374 */
pcan_usb_fd_set_options(struct peak_usb_device * dev,bool onoff,u16 ucan_mask,u16 usb_mask)375 static int pcan_usb_fd_set_options(struct peak_usb_device *dev,
376 bool onoff, u16 ucan_mask, u16 usb_mask)
377 {
378 struct pcan_ufd_options *cmd = pcan_usb_fd_cmd_buffer(dev);
379
380 cmd->opcode_channel = pucan_cmd_opcode_channel(dev->ctrl_idx,
381 (onoff) ? PUCAN_CMD_SET_EN_OPTION :
382 PUCAN_CMD_CLR_DIS_OPTION);
383
384 cmd->ucan_mask = cpu_to_le16(ucan_mask);
385 cmd->usb_mask = cpu_to_le16(usb_mask);
386
387 /* send the command */
388 return pcan_usb_fd_send_cmd(dev, ++cmd);
389 }
390
391 /* setup LED control */
pcan_usb_fd_set_can_led(struct peak_usb_device * dev,u8 led_mode)392 static int pcan_usb_fd_set_can_led(struct peak_usb_device *dev, u8 led_mode)
393 {
394 struct pcan_ufd_led *cmd = pcan_usb_fd_cmd_buffer(dev);
395
396 cmd->opcode_channel = pucan_cmd_opcode_channel(dev->ctrl_idx,
397 PCAN_UFD_CMD_LED_SET);
398 cmd->mode = led_mode;
399
400 /* send the command */
401 return pcan_usb_fd_send_cmd(dev, ++cmd);
402 }
403
404 /* set CAN clock domain */
pcan_usb_fd_set_clock_domain(struct peak_usb_device * dev,u8 clk_mode)405 static int pcan_usb_fd_set_clock_domain(struct peak_usb_device *dev,
406 u8 clk_mode)
407 {
408 struct pcan_ufd_clock *cmd = pcan_usb_fd_cmd_buffer(dev);
409
410 cmd->opcode_channel = pucan_cmd_opcode_channel(dev->ctrl_idx,
411 PCAN_UFD_CMD_CLK_SET);
412 cmd->mode = clk_mode;
413
414 /* send the command */
415 return pcan_usb_fd_send_cmd(dev, ++cmd);
416 }
417
418 /* set bittiming for CAN and CAN-FD header */
pcan_usb_fd_set_bittiming_slow(struct peak_usb_device * dev,struct can_bittiming * bt)419 static int pcan_usb_fd_set_bittiming_slow(struct peak_usb_device *dev,
420 struct can_bittiming *bt)
421 {
422 struct pucan_timing_slow *cmd = pcan_usb_fd_cmd_buffer(dev);
423
424 cmd->opcode_channel = pucan_cmd_opcode_channel(dev->ctrl_idx,
425 PUCAN_CMD_TIMING_SLOW);
426 cmd->sjw_t = PUCAN_TSLOW_SJW_T(bt->sjw - 1,
427 dev->can.ctrlmode & CAN_CTRLMODE_3_SAMPLES);
428
429 cmd->tseg2 = PUCAN_TSLOW_TSEG2(bt->phase_seg2 - 1);
430 cmd->tseg1 = PUCAN_TSLOW_TSEG1(bt->prop_seg + bt->phase_seg1 - 1);
431 cmd->brp = cpu_to_le16(PUCAN_TSLOW_BRP(bt->brp - 1));
432
433 cmd->ewl = 96; /* default */
434
435 /* send the command */
436 return pcan_usb_fd_send_cmd(dev, ++cmd);
437 }
438
439 /* set CAN-FD bittiming for data */
pcan_usb_fd_set_bittiming_fast(struct peak_usb_device * dev,struct can_bittiming * bt)440 static int pcan_usb_fd_set_bittiming_fast(struct peak_usb_device *dev,
441 struct can_bittiming *bt)
442 {
443 struct pucan_timing_fast *cmd = pcan_usb_fd_cmd_buffer(dev);
444
445 cmd->opcode_channel = pucan_cmd_opcode_channel(dev->ctrl_idx,
446 PUCAN_CMD_TIMING_FAST);
447 cmd->sjw = PUCAN_TFAST_SJW(bt->sjw - 1);
448 cmd->tseg2 = PUCAN_TFAST_TSEG2(bt->phase_seg2 - 1);
449 cmd->tseg1 = PUCAN_TFAST_TSEG1(bt->prop_seg + bt->phase_seg1 - 1);
450 cmd->brp = cpu_to_le16(PUCAN_TFAST_BRP(bt->brp - 1));
451
452 /* send the command */
453 return pcan_usb_fd_send_cmd(dev, ++cmd);
454 }
455
456 /* read user CAN channel id from device */
pcan_usb_fd_get_can_channel_id(struct peak_usb_device * dev,u32 * can_ch_id)457 static int pcan_usb_fd_get_can_channel_id(struct peak_usb_device *dev,
458 u32 *can_ch_id)
459 {
460 int err;
461 struct pcan_usb_fd_if *usb_if = pcan_usb_fd_dev_if(dev);
462
463 err = pcan_usb_fd_read_fwinfo(dev, &usb_if->fw_info);
464 if (err)
465 return err;
466
467 *can_ch_id = le32_to_cpu(usb_if->fw_info.dev_id[dev->ctrl_idx]);
468 return err;
469 }
470
471 /* set a new CAN channel id in the flash memory of the device */
pcan_usb_fd_set_can_channel_id(struct peak_usb_device * dev,u32 can_ch_id)472 static int pcan_usb_fd_set_can_channel_id(struct peak_usb_device *dev, u32 can_ch_id)
473 {
474 struct pcan_ufd_device_id *cmd = pcan_usb_fd_cmd_buffer(dev);
475
476 cmd->opcode_channel = pucan_cmd_opcode_channel(dev->ctrl_idx,
477 PCAN_UFD_CMD_DEVID_SET);
478 cmd->device_id = cpu_to_le32(can_ch_id);
479
480 /* send the command */
481 return pcan_usb_fd_send_cmd(dev, ++cmd);
482 }
483
484 /* handle restart but in asynchronously way
485 * (uses PCAN-USB Pro code to complete asynchronous request)
486 */
pcan_usb_fd_restart_async(struct peak_usb_device * dev,struct urb * urb,u8 * buf)487 static int pcan_usb_fd_restart_async(struct peak_usb_device *dev,
488 struct urb *urb, u8 *buf)
489 {
490 struct pcan_usb_fd_device *pdev =
491 container_of(dev, struct pcan_usb_fd_device, dev);
492 struct pcan_ufd_fw_info *fw_info = &pdev->usb_if->fw_info;
493 u8 *pc = buf;
494
495 /* build the entire cmds list in the provided buffer, to go back into
496 * operational mode.
497 */
498 pc += pcan_usb_fd_build_restart_cmd(dev, pc);
499
500 /* add EOC */
501 memset(pc, 0xff, sizeof(struct pucan_command));
502 pc += sizeof(struct pucan_command);
503
504 /* complete the URB */
505 usb_fill_bulk_urb(urb, dev->udev,
506 usb_sndbulkpipe(dev->udev, fw_info->cmd_out_ep),
507 buf, pc - buf,
508 pcan_usb_pro_restart_complete, dev);
509
510 /* and submit it. */
511 return usb_submit_urb(urb, GFP_ATOMIC);
512 }
513
pcan_usb_fd_drv_loaded(struct peak_usb_device * dev,bool loaded)514 static int pcan_usb_fd_drv_loaded(struct peak_usb_device *dev, bool loaded)
515 {
516 struct pcan_usb_fd_device *pdev =
517 container_of(dev, struct pcan_usb_fd_device, dev);
518
519 pdev->cmd_buffer_addr[0] = 0;
520 pdev->cmd_buffer_addr[1] = !!loaded;
521
522 return pcan_usb_pro_send_req(dev,
523 PCAN_USBPRO_REQ_FCT,
524 PCAN_USBPRO_FCT_DRVLD,
525 pdev->cmd_buffer_addr,
526 PCAN_USBPRO_FCT_DRVLD_REQ_LEN);
527 }
528
pcan_usb_fd_decode_canmsg(struct pcan_usb_fd_if * usb_if,struct pucan_msg * rx_msg)529 static int pcan_usb_fd_decode_canmsg(struct pcan_usb_fd_if *usb_if,
530 struct pucan_msg *rx_msg)
531 {
532 struct pucan_rx_msg *rm = (struct pucan_rx_msg *)rx_msg;
533 struct peak_usb_device *dev;
534 struct net_device *netdev;
535 struct canfd_frame *cfd;
536 struct sk_buff *skb;
537 const u16 rx_msg_flags = le16_to_cpu(rm->flags);
538
539 if (pucan_msg_get_channel(rm) >= ARRAY_SIZE(usb_if->dev))
540 return -ENOMEM;
541
542 dev = usb_if->dev[pucan_msg_get_channel(rm)];
543 netdev = dev->netdev;
544
545 if (rx_msg_flags & PUCAN_MSG_EXT_DATA_LEN) {
546 /* CANFD frame case */
547 skb = alloc_canfd_skb(netdev, &cfd);
548 if (!skb)
549 return -ENOMEM;
550
551 if (rx_msg_flags & PUCAN_MSG_BITRATE_SWITCH)
552 cfd->flags |= CANFD_BRS;
553
554 if (rx_msg_flags & PUCAN_MSG_ERROR_STATE_IND)
555 cfd->flags |= CANFD_ESI;
556
557 cfd->len = can_fd_dlc2len(pucan_msg_get_dlc(rm));
558 } else {
559 /* CAN 2.0 frame case */
560 skb = alloc_can_skb(netdev, (struct can_frame **)&cfd);
561 if (!skb)
562 return -ENOMEM;
563
564 can_frame_set_cc_len((struct can_frame *)cfd,
565 pucan_msg_get_dlc(rm),
566 dev->can.ctrlmode);
567 }
568
569 cfd->can_id = le32_to_cpu(rm->can_id);
570
571 if (rx_msg_flags & PUCAN_MSG_EXT_ID)
572 cfd->can_id |= CAN_EFF_FLAG;
573
574 if (rx_msg_flags & PUCAN_MSG_RTR) {
575 cfd->can_id |= CAN_RTR_FLAG;
576 } else {
577 memcpy(cfd->data, rm->d, cfd->len);
578 netdev->stats.rx_bytes += cfd->len;
579 }
580 netdev->stats.rx_packets++;
581
582 peak_usb_netif_rx_64(skb, le32_to_cpu(rm->ts_low),
583 le32_to_cpu(rm->ts_high));
584
585 return 0;
586 }
587
588 /* handle uCAN status message */
pcan_usb_fd_decode_status(struct pcan_usb_fd_if * usb_if,struct pucan_msg * rx_msg)589 static int pcan_usb_fd_decode_status(struct pcan_usb_fd_if *usb_if,
590 struct pucan_msg *rx_msg)
591 {
592 struct pucan_status_msg *sm = (struct pucan_status_msg *)rx_msg;
593 struct pcan_usb_fd_device *pdev;
594 enum can_state new_state = CAN_STATE_ERROR_ACTIVE;
595 enum can_state rx_state, tx_state;
596 struct peak_usb_device *dev;
597 struct net_device *netdev;
598 struct can_frame *cf;
599 struct sk_buff *skb;
600
601 if (pucan_stmsg_get_channel(sm) >= ARRAY_SIZE(usb_if->dev))
602 return -ENOMEM;
603
604 dev = usb_if->dev[pucan_stmsg_get_channel(sm)];
605 pdev = container_of(dev, struct pcan_usb_fd_device, dev);
606 netdev = dev->netdev;
607
608 /* nothing should be sent while in BUS_OFF state */
609 if (dev->can.state == CAN_STATE_BUS_OFF)
610 return 0;
611
612 if (sm->channel_p_w_b & PUCAN_BUS_BUSOFF) {
613 new_state = CAN_STATE_BUS_OFF;
614 } else if (sm->channel_p_w_b & PUCAN_BUS_PASSIVE) {
615 new_state = CAN_STATE_ERROR_PASSIVE;
616 } else if (sm->channel_p_w_b & PUCAN_BUS_WARNING) {
617 new_state = CAN_STATE_ERROR_WARNING;
618 } else {
619 /* back to (or still in) ERROR_ACTIVE state */
620 new_state = CAN_STATE_ERROR_ACTIVE;
621 pdev->bec.txerr = 0;
622 pdev->bec.rxerr = 0;
623 }
624
625 /* state hasn't changed */
626 if (new_state == dev->can.state)
627 return 0;
628
629 /* handle bus state change */
630 tx_state = (pdev->bec.txerr >= pdev->bec.rxerr) ? new_state : 0;
631 rx_state = (pdev->bec.txerr <= pdev->bec.rxerr) ? new_state : 0;
632
633 /* allocate an skb to store the error frame */
634 skb = alloc_can_err_skb(netdev, &cf);
635 can_change_state(netdev, cf, tx_state, rx_state);
636
637 /* things must be done even in case of OOM */
638 if (new_state == CAN_STATE_BUS_OFF)
639 can_bus_off(netdev);
640
641 if (!skb)
642 return -ENOMEM;
643
644 peak_usb_netif_rx_64(skb, le32_to_cpu(sm->ts_low),
645 le32_to_cpu(sm->ts_high));
646
647 return 0;
648 }
649
650 /* handle uCAN error message */
pcan_usb_fd_decode_error(struct pcan_usb_fd_if * usb_if,struct pucan_msg * rx_msg)651 static int pcan_usb_fd_decode_error(struct pcan_usb_fd_if *usb_if,
652 struct pucan_msg *rx_msg)
653 {
654 struct pucan_error_msg *er = (struct pucan_error_msg *)rx_msg;
655 struct pcan_usb_fd_device *pdev;
656 struct peak_usb_device *dev;
657
658 if (pucan_ermsg_get_channel(er) >= ARRAY_SIZE(usb_if->dev))
659 return -EINVAL;
660
661 dev = usb_if->dev[pucan_ermsg_get_channel(er)];
662 pdev = container_of(dev, struct pcan_usb_fd_device, dev);
663
664 /* keep a trace of tx and rx error counters for later use */
665 pdev->bec.txerr = er->tx_err_cnt;
666 pdev->bec.rxerr = er->rx_err_cnt;
667
668 return 0;
669 }
670
671 /* handle uCAN overrun message */
pcan_usb_fd_decode_overrun(struct pcan_usb_fd_if * usb_if,struct pucan_msg * rx_msg)672 static int pcan_usb_fd_decode_overrun(struct pcan_usb_fd_if *usb_if,
673 struct pucan_msg *rx_msg)
674 {
675 struct pcan_ufd_ovr_msg *ov = (struct pcan_ufd_ovr_msg *)rx_msg;
676 struct peak_usb_device *dev;
677 struct net_device *netdev;
678 struct can_frame *cf;
679 struct sk_buff *skb;
680
681 if (pufd_omsg_get_channel(ov) >= ARRAY_SIZE(usb_if->dev))
682 return -EINVAL;
683
684 dev = usb_if->dev[pufd_omsg_get_channel(ov)];
685 netdev = dev->netdev;
686
687 /* allocate an skb to store the error frame */
688 skb = alloc_can_err_skb(netdev, &cf);
689 if (!skb)
690 return -ENOMEM;
691
692 cf->can_id |= CAN_ERR_CRTL;
693 cf->data[1] |= CAN_ERR_CRTL_RX_OVERFLOW;
694
695 peak_usb_netif_rx_64(skb, le32_to_cpu(ov->ts_low),
696 le32_to_cpu(ov->ts_high));
697
698 netdev->stats.rx_over_errors++;
699 netdev->stats.rx_errors++;
700
701 return 0;
702 }
703
704 /* handle USB calibration message */
pcan_usb_fd_decode_ts(struct pcan_usb_fd_if * usb_if,struct pucan_msg * rx_msg)705 static void pcan_usb_fd_decode_ts(struct pcan_usb_fd_if *usb_if,
706 struct pucan_msg *rx_msg)
707 {
708 struct pcan_ufd_ts_msg *ts = (struct pcan_ufd_ts_msg *)rx_msg;
709
710 /* should wait until clock is stabilized */
711 if (usb_if->cm_ignore_count > 0)
712 usb_if->cm_ignore_count--;
713 else
714 peak_usb_set_ts_now(&usb_if->time_ref, le32_to_cpu(ts->ts_low));
715 }
716
717 /* callback for bulk IN urb */
pcan_usb_fd_decode_buf(struct peak_usb_device * dev,struct urb * urb)718 static int pcan_usb_fd_decode_buf(struct peak_usb_device *dev, struct urb *urb)
719 {
720 struct pcan_usb_fd_if *usb_if = pcan_usb_fd_dev_if(dev);
721 struct net_device *netdev = dev->netdev;
722 struct pucan_msg *rx_msg;
723 u8 *msg_ptr, *msg_end;
724 int err = 0;
725
726 /* loop reading all the records from the incoming message */
727 msg_ptr = urb->transfer_buffer;
728 msg_end = urb->transfer_buffer + urb->actual_length;
729 for (; msg_ptr < msg_end;) {
730 u16 rx_msg_type, rx_msg_size;
731
732 rx_msg = (struct pucan_msg *)msg_ptr;
733 if (!rx_msg->size) {
734 /* null packet found: end of list */
735 break;
736 }
737
738 rx_msg_size = le16_to_cpu(rx_msg->size);
739 rx_msg_type = le16_to_cpu(rx_msg->type);
740
741 /* check if the record goes out of current packet */
742 if (msg_ptr + rx_msg_size > msg_end) {
743 netdev_err(netdev,
744 "got frag rec: should inc usb rx buf sze\n");
745 err = -EBADMSG;
746 break;
747 }
748
749 switch (rx_msg_type) {
750 case PUCAN_MSG_CAN_RX:
751 err = pcan_usb_fd_decode_canmsg(usb_if, rx_msg);
752 if (err < 0)
753 goto fail;
754 break;
755
756 case PCAN_UFD_MSG_CALIBRATION:
757 pcan_usb_fd_decode_ts(usb_if, rx_msg);
758 break;
759
760 case PUCAN_MSG_ERROR:
761 err = pcan_usb_fd_decode_error(usb_if, rx_msg);
762 if (err < 0)
763 goto fail;
764 break;
765
766 case PUCAN_MSG_STATUS:
767 err = pcan_usb_fd_decode_status(usb_if, rx_msg);
768 if (err < 0)
769 goto fail;
770 break;
771
772 case PCAN_UFD_MSG_OVERRUN:
773 err = pcan_usb_fd_decode_overrun(usb_if, rx_msg);
774 if (err < 0)
775 goto fail;
776 break;
777
778 default:
779 netdev_err(netdev,
780 "unhandled msg type 0x%02x (%d): ignored\n",
781 rx_msg_type, rx_msg_type);
782 break;
783 }
784
785 msg_ptr += rx_msg_size;
786 }
787
788 fail:
789 if (err)
790 pcan_dump_mem("received msg",
791 urb->transfer_buffer, urb->actual_length);
792 return err;
793 }
794
795 /* CAN/CANFD frames encoding callback */
pcan_usb_fd_encode_msg(struct peak_usb_device * dev,struct sk_buff * skb,u8 * obuf,size_t * size)796 static int pcan_usb_fd_encode_msg(struct peak_usb_device *dev,
797 struct sk_buff *skb, u8 *obuf, size_t *size)
798 {
799 struct pucan_tx_msg *tx_msg = (struct pucan_tx_msg *)obuf;
800 struct canfd_frame *cfd = (struct canfd_frame *)skb->data;
801 u16 tx_msg_size, tx_msg_flags;
802 u8 dlc;
803
804 if (cfd->len > CANFD_MAX_DLEN)
805 return -EINVAL;
806
807 tx_msg_size = ALIGN(sizeof(struct pucan_tx_msg) + cfd->len, 4);
808 tx_msg->size = cpu_to_le16(tx_msg_size);
809 tx_msg->type = cpu_to_le16(PUCAN_MSG_CAN_TX);
810
811 tx_msg_flags = 0;
812 if (cfd->can_id & CAN_EFF_FLAG) {
813 tx_msg_flags |= PUCAN_MSG_EXT_ID;
814 tx_msg->can_id = cpu_to_le32(cfd->can_id & CAN_EFF_MASK);
815 } else {
816 tx_msg->can_id = cpu_to_le32(cfd->can_id & CAN_SFF_MASK);
817 }
818
819 if (can_is_canfd_skb(skb)) {
820 /* considering a CANFD frame */
821 dlc = can_fd_len2dlc(cfd->len);
822
823 tx_msg_flags |= PUCAN_MSG_EXT_DATA_LEN;
824
825 if (cfd->flags & CANFD_BRS)
826 tx_msg_flags |= PUCAN_MSG_BITRATE_SWITCH;
827
828 if (cfd->flags & CANFD_ESI)
829 tx_msg_flags |= PUCAN_MSG_ERROR_STATE_IND;
830 } else {
831 /* CAND 2.0 frames */
832 dlc = can_get_cc_dlc((struct can_frame *)cfd,
833 dev->can.ctrlmode);
834
835 if (cfd->can_id & CAN_RTR_FLAG)
836 tx_msg_flags |= PUCAN_MSG_RTR;
837 }
838
839 /* Single-Shot frame */
840 if (dev->can.ctrlmode & CAN_CTRLMODE_ONE_SHOT)
841 tx_msg_flags |= PUCAN_MSG_SINGLE_SHOT;
842
843 tx_msg->flags = cpu_to_le16(tx_msg_flags);
844 tx_msg->channel_dlc = PUCAN_MSG_CHANNEL_DLC(dev->ctrl_idx, dlc);
845 memcpy(tx_msg->d, cfd->data, cfd->len);
846
847 /* add null size message to tag the end (messages are 32-bits aligned)
848 */
849 tx_msg = (struct pucan_tx_msg *)(obuf + tx_msg_size);
850
851 tx_msg->size = 0;
852
853 /* set the whole size of the USB packet to send */
854 *size = tx_msg_size + sizeof(u32);
855
856 return 0;
857 }
858
859 /* start the interface (last chance before set bus on) */
pcan_usb_fd_start(struct peak_usb_device * dev)860 static int pcan_usb_fd_start(struct peak_usb_device *dev)
861 {
862 struct pcan_usb_fd_device *pdev =
863 container_of(dev, struct pcan_usb_fd_device, dev);
864 int err;
865
866 /* set filter mode: all acceptance */
867 err = pcan_usb_fd_set_filter_std(dev, -1, 0xffffffff);
868 if (err)
869 return err;
870
871 /* opening first device: */
872 if (pdev->usb_if->dev_opened_count == 0) {
873 /* reset time_ref */
874 peak_usb_init_time_ref(&pdev->usb_if->time_ref,
875 &pcan_usb_pro_fd);
876
877 /* enable USB calibration messages */
878 err = pcan_usb_fd_set_options(dev, 1,
879 PUCAN_OPTION_ERROR,
880 PCAN_UFD_FLTEXT_CALIBRATION);
881 }
882
883 pdev->usb_if->dev_opened_count++;
884
885 /* reset cached error counters */
886 pdev->bec.txerr = 0;
887 pdev->bec.rxerr = 0;
888
889 return err;
890 }
891
892 /* socket callback used to copy berr counters values received through USB */
pcan_usb_fd_get_berr_counter(const struct net_device * netdev,struct can_berr_counter * bec)893 static int pcan_usb_fd_get_berr_counter(const struct net_device *netdev,
894 struct can_berr_counter *bec)
895 {
896 struct peak_usb_device *dev = netdev_priv(netdev);
897 struct pcan_usb_fd_device *pdev =
898 container_of(dev, struct pcan_usb_fd_device, dev);
899
900 *bec = pdev->bec;
901
902 /* must return 0 */
903 return 0;
904 }
905
906 /* probe function for all PCAN-USB FD family usb interfaces */
pcan_usb_fd_probe(struct usb_interface * intf)907 static int pcan_usb_fd_probe(struct usb_interface *intf)
908 {
909 struct usb_host_interface *iface_desc = &intf->altsetting[0];
910
911 /* CAN interface is always interface #0 */
912 return iface_desc->desc.bInterfaceNumber;
913 }
914
915 /* stop interface (last chance before set bus off) */
pcan_usb_fd_stop(struct peak_usb_device * dev)916 static int pcan_usb_fd_stop(struct peak_usb_device *dev)
917 {
918 struct pcan_usb_fd_device *pdev =
919 container_of(dev, struct pcan_usb_fd_device, dev);
920
921 /* turn off special msgs for that interface if no other dev opened */
922 if (pdev->usb_if->dev_opened_count == 1)
923 pcan_usb_fd_set_options(dev, 0,
924 PUCAN_OPTION_ERROR,
925 PCAN_UFD_FLTEXT_CALIBRATION);
926 pdev->usb_if->dev_opened_count--;
927
928 return 0;
929 }
930
931 /* called when probing, to initialize a device object */
pcan_usb_fd_init(struct peak_usb_device * dev)932 static int pcan_usb_fd_init(struct peak_usb_device *dev)
933 {
934 struct pcan_usb_fd_device *pdev =
935 container_of(dev, struct pcan_usb_fd_device, dev);
936 struct pcan_ufd_fw_info *fw_info;
937 int i, err = -ENOMEM;
938
939 /* do this for 1st channel only */
940 if (!dev->prev_siblings) {
941 /* allocate netdevices common structure attached to first one */
942 pdev->usb_if = kzalloc_obj(*pdev->usb_if);
943 if (!pdev->usb_if)
944 goto err_out;
945
946 /* allocate command buffer once for all for the interface */
947 pdev->cmd_buffer_addr = kzalloc(PCAN_UFD_CMD_BUFFER_SIZE,
948 GFP_KERNEL);
949 if (!pdev->cmd_buffer_addr)
950 goto err_out_1;
951
952 /* number of ts msgs to ignore before taking one into account */
953 pdev->usb_if->cm_ignore_count = 5;
954
955 fw_info = &pdev->usb_if->fw_info;
956
957 err = pcan_usb_fd_read_fwinfo(dev, fw_info);
958 if (err) {
959 dev_err(dev->netdev->dev.parent,
960 "unable to read %s firmware info (err %d)\n",
961 dev->adapter->name, err);
962 goto err_out_2;
963 }
964
965 /* explicit use of dev_xxx() instead of netdev_xxx() here:
966 * information displayed are related to the device itself, not
967 * to the canx (channel) device.
968 */
969 dev_info(dev->netdev->dev.parent,
970 "PEAK-System %s v%u fw v%u.%u.%u (%u channels)\n",
971 dev->adapter->name, fw_info->hw_version,
972 fw_info->fw_version[0],
973 fw_info->fw_version[1],
974 fw_info->fw_version[2],
975 dev->adapter->ctrl_count);
976
977 /* check for ability to switch between ISO/non-ISO modes */
978 if (fw_info->fw_version[0] >= 2) {
979 /* firmware >= 2.x supports ISO/non-ISO switching */
980 dev->can.ctrlmode_supported |= CAN_CTRLMODE_FD_NON_ISO;
981 } else {
982 /* firmware < 2.x only supports fixed(!) non-ISO */
983 dev->can.ctrlmode |= CAN_CTRLMODE_FD_NON_ISO;
984 }
985
986 /* if vendor rsp type is greater than or equal to 2, then it
987 * contains EP numbers to use for cmds pipes. If not, then
988 * default EP should be used.
989 */
990 if (le16_to_cpu(fw_info->type) < PCAN_USBFD_TYPE_EXT) {
991 fw_info->cmd_out_ep = PCAN_USBPRO_EP_CMDOUT;
992 fw_info->cmd_in_ep = PCAN_USBPRO_EP_CMDIN;
993 }
994
995 /* tell the hardware the can driver is running */
996 err = pcan_usb_fd_drv_loaded(dev, 1);
997 if (err) {
998 dev_err(dev->netdev->dev.parent,
999 "unable to tell %s driver is loaded (err %d)\n",
1000 dev->adapter->name, err);
1001 goto err_out_2;
1002 }
1003 } else {
1004 /* otherwise, simply copy previous sibling's values */
1005 struct pcan_usb_fd_device *ppdev =
1006 container_of(dev->prev_siblings,
1007 struct pcan_usb_fd_device, dev);
1008
1009 pdev->usb_if = ppdev->usb_if;
1010 pdev->cmd_buffer_addr = ppdev->cmd_buffer_addr;
1011
1012 /* do a copy of the ctrlmode[_supported] too */
1013 dev->can.ctrlmode = ppdev->dev.can.ctrlmode;
1014 dev->can.ctrlmode_supported = ppdev->dev.can.ctrlmode_supported;
1015
1016 fw_info = &pdev->usb_if->fw_info;
1017 }
1018
1019 pdev->usb_if->dev[dev->ctrl_idx] = dev;
1020 dev->can_channel_id =
1021 le32_to_cpu(pdev->usb_if->fw_info.dev_id[dev->ctrl_idx]);
1022
1023 /* if vendor rsp type is greater than or equal to 2, then it contains EP
1024 * numbers to use for data pipes. If not, then statically defined EP are
1025 * used (see peak_usb_create_dev()).
1026 */
1027 if (le16_to_cpu(fw_info->type) >= PCAN_USBFD_TYPE_EXT) {
1028 dev->ep_msg_in = fw_info->data_in_ep;
1029 dev->ep_msg_out = fw_info->data_out_ep[dev->ctrl_idx];
1030 }
1031
1032 /* set clock domain */
1033 for (i = 0; i < ARRAY_SIZE(pcan_usb_fd_clk_freq); i++)
1034 if (dev->adapter->clock.freq == pcan_usb_fd_clk_freq[i])
1035 break;
1036
1037 if (i >= ARRAY_SIZE(pcan_usb_fd_clk_freq)) {
1038 dev_warn(dev->netdev->dev.parent,
1039 "incompatible clock frequencies\n");
1040 err = -EINVAL;
1041 goto err_out_2;
1042 }
1043
1044 pcan_usb_fd_set_clock_domain(dev, i);
1045
1046 /* set LED in default state (end of init phase) */
1047 pcan_usb_fd_set_can_led(dev, PCAN_UFD_LED_DEF);
1048
1049 return 0;
1050
1051 err_out_2:
1052 kfree(pdev->cmd_buffer_addr);
1053 err_out_1:
1054 kfree(pdev->usb_if);
1055 err_out:
1056 return err;
1057 }
1058
1059 /* called when driver module is being unloaded */
pcan_usb_fd_exit(struct peak_usb_device * dev)1060 static void pcan_usb_fd_exit(struct peak_usb_device *dev)
1061 {
1062 struct pcan_usb_fd_device *pdev =
1063 container_of(dev, struct pcan_usb_fd_device, dev);
1064
1065 /* when rmmod called before unplug and if down, should reset things
1066 * before leaving
1067 */
1068 if (dev->can.state != CAN_STATE_STOPPED) {
1069 /* set bus off on the corresponding channel */
1070 pcan_usb_fd_set_bus(dev, 0);
1071 }
1072
1073 /* switch off corresponding CAN LEDs */
1074 pcan_usb_fd_set_can_led(dev, PCAN_UFD_LED_OFF);
1075
1076 /* if channel #0 (only) */
1077 if (dev->ctrl_idx == 0) {
1078 /* turn off calibration message if any device were opened */
1079 if (pdev->usb_if->dev_opened_count > 0)
1080 pcan_usb_fd_set_options(dev, 0,
1081 PUCAN_OPTION_ERROR,
1082 PCAN_UFD_FLTEXT_CALIBRATION);
1083
1084 /* tell USB adapter that the driver is being unloaded */
1085 pcan_usb_fd_drv_loaded(dev, 0);
1086 }
1087 }
1088
1089 /* called when the USB adapter is unplugged */
pcan_usb_fd_free(struct peak_usb_device * dev)1090 static void pcan_usb_fd_free(struct peak_usb_device *dev)
1091 {
1092 /* last device: can free shared objects now */
1093 if (!dev->prev_siblings && !dev->next_siblings) {
1094 struct pcan_usb_fd_device *pdev =
1095 container_of(dev, struct pcan_usb_fd_device, dev);
1096
1097 /* free commands buffer */
1098 kfree(pdev->cmd_buffer_addr);
1099
1100 /* free usb interface object */
1101 kfree(pdev->usb_if);
1102 }
1103 }
1104
1105 /* blink LED's */
pcan_usb_fd_set_phys_id(struct net_device * netdev,enum ethtool_phys_id_state state)1106 static int pcan_usb_fd_set_phys_id(struct net_device *netdev,
1107 enum ethtool_phys_id_state state)
1108 {
1109 struct peak_usb_device *dev = netdev_priv(netdev);
1110 int err = 0;
1111
1112 switch (state) {
1113 case ETHTOOL_ID_ACTIVE:
1114 err = pcan_usb_fd_set_can_led(dev, PCAN_UFD_LED_FAST);
1115 break;
1116 case ETHTOOL_ID_INACTIVE:
1117 err = pcan_usb_fd_set_can_led(dev, PCAN_UFD_LED_DEF);
1118 break;
1119 default:
1120 break;
1121 }
1122
1123 return err;
1124 }
1125
1126 static const struct ethtool_ops pcan_usb_fd_ethtool_ops = {
1127 .set_phys_id = pcan_usb_fd_set_phys_id,
1128 .get_ts_info = pcan_get_ts_info,
1129 .get_eeprom_len = peak_usb_get_eeprom_len,
1130 .get_eeprom = peak_usb_get_eeprom,
1131 .set_eeprom = peak_usb_set_eeprom,
1132 };
1133
1134 /* describes the PCAN-USB FD adapter */
1135 static const struct can_bittiming_const pcan_usb_fd_const = {
1136 .name = "pcan_usb_fd",
1137 .tseg1_min = 1,
1138 .tseg1_max = (1 << PUCAN_TSLOW_TSGEG1_BITS),
1139 .tseg2_min = 1,
1140 .tseg2_max = (1 << PUCAN_TSLOW_TSGEG2_BITS),
1141 .sjw_max = (1 << PUCAN_TSLOW_SJW_BITS),
1142 .brp_min = 1,
1143 .brp_max = (1 << PUCAN_TSLOW_BRP_BITS),
1144 .brp_inc = 1,
1145 };
1146
1147 static const struct can_bittiming_const pcan_usb_fd_data_const = {
1148 .name = "pcan_usb_fd",
1149 .tseg1_min = 1,
1150 .tseg1_max = (1 << PUCAN_TFAST_TSGEG1_BITS),
1151 .tseg2_min = 1,
1152 .tseg2_max = (1 << PUCAN_TFAST_TSGEG2_BITS),
1153 .sjw_max = (1 << PUCAN_TFAST_SJW_BITS),
1154 .brp_min = 1,
1155 .brp_max = (1 << PUCAN_TFAST_BRP_BITS),
1156 .brp_inc = 1,
1157 };
1158
1159 const struct peak_usb_adapter pcan_usb_fd = {
1160 .name = "PCAN-USB FD",
1161 .device_id = PCAN_USBFD_PRODUCT_ID,
1162 .ctrl_count = PCAN_USBFD_CHANNEL_COUNT,
1163 .ctrlmode_supported = CAN_CTRLMODE_FD |
1164 CAN_CTRLMODE_3_SAMPLES | CAN_CTRLMODE_LISTENONLY |
1165 CAN_CTRLMODE_ONE_SHOT | CAN_CTRLMODE_CC_LEN8_DLC,
1166 .clock = {
1167 .freq = PCAN_UFD_CRYSTAL_HZ,
1168 },
1169 .bittiming_const = &pcan_usb_fd_const,
1170 .data_bittiming_const = &pcan_usb_fd_data_const,
1171
1172 /* size of device private data */
1173 .sizeof_dev_private = sizeof(struct pcan_usb_fd_device),
1174
1175 .ethtool_ops = &pcan_usb_fd_ethtool_ops,
1176
1177 /* timestamps usage */
1178 .ts_used_bits = 32,
1179 .us_per_ts_scale = 1, /* us = (ts * scale) >> shift */
1180 .us_per_ts_shift = 0,
1181
1182 /* give here messages in/out endpoints */
1183 .ep_msg_in = PCAN_USBPRO_EP_MSGIN,
1184 .ep_msg_out = {PCAN_USBPRO_EP_MSGOUT_0},
1185
1186 /* size of rx/tx usb buffers */
1187 .rx_buffer_size = PCAN_UFD_RX_BUFFER_SIZE,
1188 .tx_buffer_size = PCAN_UFD_TX_BUFFER_SIZE,
1189
1190 /* device callbacks */
1191 .intf_probe = pcan_usb_fd_probe,
1192 .dev_init = pcan_usb_fd_init,
1193
1194 .dev_exit = pcan_usb_fd_exit,
1195 .dev_free = pcan_usb_fd_free,
1196 .dev_set_bus = pcan_usb_fd_set_bus,
1197 .dev_set_bittiming = pcan_usb_fd_set_bittiming_slow,
1198 .dev_set_data_bittiming = pcan_usb_fd_set_bittiming_fast,
1199 .dev_get_can_channel_id = pcan_usb_fd_get_can_channel_id,
1200 .dev_set_can_channel_id = pcan_usb_fd_set_can_channel_id,
1201 .dev_decode_buf = pcan_usb_fd_decode_buf,
1202 .dev_start = pcan_usb_fd_start,
1203 .dev_stop = pcan_usb_fd_stop,
1204 .dev_restart_async = pcan_usb_fd_restart_async,
1205 .dev_encode_msg = pcan_usb_fd_encode_msg,
1206
1207 .do_get_berr_counter = pcan_usb_fd_get_berr_counter,
1208 };
1209
1210 /* describes the PCAN-CHIP USB */
1211 static const struct can_bittiming_const pcan_usb_chip_const = {
1212 .name = "pcan_chip_usb",
1213 .tseg1_min = 1,
1214 .tseg1_max = (1 << PUCAN_TSLOW_TSGEG1_BITS),
1215 .tseg2_min = 1,
1216 .tseg2_max = (1 << PUCAN_TSLOW_TSGEG2_BITS),
1217 .sjw_max = (1 << PUCAN_TSLOW_SJW_BITS),
1218 .brp_min = 1,
1219 .brp_max = (1 << PUCAN_TSLOW_BRP_BITS),
1220 .brp_inc = 1,
1221 };
1222
1223 static const struct can_bittiming_const pcan_usb_chip_data_const = {
1224 .name = "pcan_chip_usb",
1225 .tseg1_min = 1,
1226 .tseg1_max = (1 << PUCAN_TFAST_TSGEG1_BITS),
1227 .tseg2_min = 1,
1228 .tseg2_max = (1 << PUCAN_TFAST_TSGEG2_BITS),
1229 .sjw_max = (1 << PUCAN_TFAST_SJW_BITS),
1230 .brp_min = 1,
1231 .brp_max = (1 << PUCAN_TFAST_BRP_BITS),
1232 .brp_inc = 1,
1233 };
1234
1235 const struct peak_usb_adapter pcan_usb_chip = {
1236 .name = "PCAN-Chip USB",
1237 .device_id = PCAN_USBCHIP_PRODUCT_ID,
1238 .ctrl_count = PCAN_USBFD_CHANNEL_COUNT,
1239 .ctrlmode_supported = CAN_CTRLMODE_FD |
1240 CAN_CTRLMODE_3_SAMPLES | CAN_CTRLMODE_LISTENONLY |
1241 CAN_CTRLMODE_ONE_SHOT | CAN_CTRLMODE_CC_LEN8_DLC,
1242 .clock = {
1243 .freq = PCAN_UFD_CRYSTAL_HZ,
1244 },
1245 .bittiming_const = &pcan_usb_chip_const,
1246 .data_bittiming_const = &pcan_usb_chip_data_const,
1247
1248 /* size of device private data */
1249 .sizeof_dev_private = sizeof(struct pcan_usb_fd_device),
1250
1251 .ethtool_ops = &pcan_usb_fd_ethtool_ops,
1252
1253 /* timestamps usage */
1254 .ts_used_bits = 32,
1255 .us_per_ts_scale = 1, /* us = (ts * scale) >> shift */
1256 .us_per_ts_shift = 0,
1257
1258 /* give here messages in/out endpoints */
1259 .ep_msg_in = PCAN_USBPRO_EP_MSGIN,
1260 .ep_msg_out = {PCAN_USBPRO_EP_MSGOUT_0},
1261
1262 /* size of rx/tx usb buffers */
1263 .rx_buffer_size = PCAN_UFD_RX_BUFFER_SIZE,
1264 .tx_buffer_size = PCAN_UFD_TX_BUFFER_SIZE,
1265
1266 /* device callbacks */
1267 .intf_probe = pcan_usb_pro_probe, /* same as PCAN-USB Pro */
1268 .dev_init = pcan_usb_fd_init,
1269
1270 .dev_exit = pcan_usb_fd_exit,
1271 .dev_free = pcan_usb_fd_free,
1272 .dev_set_bus = pcan_usb_fd_set_bus,
1273 .dev_set_bittiming = pcan_usb_fd_set_bittiming_slow,
1274 .dev_set_data_bittiming = pcan_usb_fd_set_bittiming_fast,
1275 .dev_get_can_channel_id = pcan_usb_fd_get_can_channel_id,
1276 .dev_set_can_channel_id = pcan_usb_fd_set_can_channel_id,
1277 .dev_decode_buf = pcan_usb_fd_decode_buf,
1278 .dev_start = pcan_usb_fd_start,
1279 .dev_stop = pcan_usb_fd_stop,
1280 .dev_restart_async = pcan_usb_fd_restart_async,
1281 .dev_encode_msg = pcan_usb_fd_encode_msg,
1282
1283 .do_get_berr_counter = pcan_usb_fd_get_berr_counter,
1284 };
1285
1286 /* describes the PCAN-USB Pro FD adapter */
1287 static const struct can_bittiming_const pcan_usb_pro_fd_const = {
1288 .name = "pcan_usb_pro_fd",
1289 .tseg1_min = 1,
1290 .tseg1_max = (1 << PUCAN_TSLOW_TSGEG1_BITS),
1291 .tseg2_min = 1,
1292 .tseg2_max = (1 << PUCAN_TSLOW_TSGEG2_BITS),
1293 .sjw_max = (1 << PUCAN_TSLOW_SJW_BITS),
1294 .brp_min = 1,
1295 .brp_max = (1 << PUCAN_TSLOW_BRP_BITS),
1296 .brp_inc = 1,
1297 };
1298
1299 static const struct can_bittiming_const pcan_usb_pro_fd_data_const = {
1300 .name = "pcan_usb_pro_fd",
1301 .tseg1_min = 1,
1302 .tseg1_max = (1 << PUCAN_TFAST_TSGEG1_BITS),
1303 .tseg2_min = 1,
1304 .tseg2_max = (1 << PUCAN_TFAST_TSGEG2_BITS),
1305 .sjw_max = (1 << PUCAN_TFAST_SJW_BITS),
1306 .brp_min = 1,
1307 .brp_max = (1 << PUCAN_TFAST_BRP_BITS),
1308 .brp_inc = 1,
1309 };
1310
1311 const struct peak_usb_adapter pcan_usb_pro_fd = {
1312 .name = "PCAN-USB Pro FD",
1313 .device_id = PCAN_USBPROFD_PRODUCT_ID,
1314 .ctrl_count = PCAN_USBPROFD_CHANNEL_COUNT,
1315 .ctrlmode_supported = CAN_CTRLMODE_FD |
1316 CAN_CTRLMODE_3_SAMPLES | CAN_CTRLMODE_LISTENONLY |
1317 CAN_CTRLMODE_ONE_SHOT | CAN_CTRLMODE_CC_LEN8_DLC,
1318 .clock = {
1319 .freq = PCAN_UFD_CRYSTAL_HZ,
1320 },
1321 .bittiming_const = &pcan_usb_pro_fd_const,
1322 .data_bittiming_const = &pcan_usb_pro_fd_data_const,
1323
1324 /* size of device private data */
1325 .sizeof_dev_private = sizeof(struct pcan_usb_fd_device),
1326
1327 .ethtool_ops = &pcan_usb_fd_ethtool_ops,
1328
1329 /* timestamps usage */
1330 .ts_used_bits = 32,
1331 .us_per_ts_scale = 1, /* us = (ts * scale) >> shift */
1332 .us_per_ts_shift = 0,
1333
1334 /* give here messages in/out endpoints */
1335 .ep_msg_in = PCAN_USBPRO_EP_MSGIN,
1336 .ep_msg_out = {PCAN_USBPRO_EP_MSGOUT_0, PCAN_USBPRO_EP_MSGOUT_1},
1337
1338 /* size of rx/tx usb buffers */
1339 .rx_buffer_size = PCAN_UFD_RX_BUFFER_SIZE,
1340 .tx_buffer_size = PCAN_UFD_TX_BUFFER_SIZE,
1341
1342 /* device callbacks */
1343 .intf_probe = pcan_usb_pro_probe, /* same as PCAN-USB Pro */
1344 .dev_init = pcan_usb_fd_init,
1345
1346 .dev_exit = pcan_usb_fd_exit,
1347 .dev_free = pcan_usb_fd_free,
1348 .dev_set_bus = pcan_usb_fd_set_bus,
1349 .dev_set_bittiming = pcan_usb_fd_set_bittiming_slow,
1350 .dev_set_data_bittiming = pcan_usb_fd_set_bittiming_fast,
1351 .dev_get_can_channel_id = pcan_usb_fd_get_can_channel_id,
1352 .dev_set_can_channel_id = pcan_usb_fd_set_can_channel_id,
1353 .dev_decode_buf = pcan_usb_fd_decode_buf,
1354 .dev_start = pcan_usb_fd_start,
1355 .dev_stop = pcan_usb_fd_stop,
1356 .dev_restart_async = pcan_usb_fd_restart_async,
1357 .dev_encode_msg = pcan_usb_fd_encode_msg,
1358
1359 .do_get_berr_counter = pcan_usb_fd_get_berr_counter,
1360 };
1361
1362 /* describes the PCAN-USB X6 adapter */
1363 static const struct can_bittiming_const pcan_usb_x6_const = {
1364 .name = "pcan_usb_x6",
1365 .tseg1_min = 1,
1366 .tseg1_max = (1 << PUCAN_TSLOW_TSGEG1_BITS),
1367 .tseg2_min = 1,
1368 .tseg2_max = (1 << PUCAN_TSLOW_TSGEG2_BITS),
1369 .sjw_max = (1 << PUCAN_TSLOW_SJW_BITS),
1370 .brp_min = 1,
1371 .brp_max = (1 << PUCAN_TSLOW_BRP_BITS),
1372 .brp_inc = 1,
1373 };
1374
1375 static const struct can_bittiming_const pcan_usb_x6_data_const = {
1376 .name = "pcan_usb_x6",
1377 .tseg1_min = 1,
1378 .tseg1_max = (1 << PUCAN_TFAST_TSGEG1_BITS),
1379 .tseg2_min = 1,
1380 .tseg2_max = (1 << PUCAN_TFAST_TSGEG2_BITS),
1381 .sjw_max = (1 << PUCAN_TFAST_SJW_BITS),
1382 .brp_min = 1,
1383 .brp_max = (1 << PUCAN_TFAST_BRP_BITS),
1384 .brp_inc = 1,
1385 };
1386
1387 const struct peak_usb_adapter pcan_usb_x6 = {
1388 .name = "PCAN-USB X6",
1389 .device_id = PCAN_USBX6_PRODUCT_ID,
1390 .ctrl_count = PCAN_USBPROFD_CHANNEL_COUNT,
1391 .ctrlmode_supported = CAN_CTRLMODE_FD |
1392 CAN_CTRLMODE_3_SAMPLES | CAN_CTRLMODE_LISTENONLY |
1393 CAN_CTRLMODE_ONE_SHOT | CAN_CTRLMODE_CC_LEN8_DLC,
1394 .clock = {
1395 .freq = PCAN_UFD_CRYSTAL_HZ,
1396 },
1397 .bittiming_const = &pcan_usb_x6_const,
1398 .data_bittiming_const = &pcan_usb_x6_data_const,
1399
1400 /* size of device private data */
1401 .sizeof_dev_private = sizeof(struct pcan_usb_fd_device),
1402
1403 .ethtool_ops = &pcan_usb_fd_ethtool_ops,
1404
1405 /* timestamps usage */
1406 .ts_used_bits = 32,
1407 .us_per_ts_scale = 1, /* us = (ts * scale) >> shift */
1408 .us_per_ts_shift = 0,
1409
1410 /* give here messages in/out endpoints */
1411 .ep_msg_in = PCAN_USBPRO_EP_MSGIN,
1412 .ep_msg_out = {PCAN_USBPRO_EP_MSGOUT_0, PCAN_USBPRO_EP_MSGOUT_1},
1413
1414 /* size of rx/tx usb buffers */
1415 .rx_buffer_size = PCAN_UFD_RX_BUFFER_SIZE,
1416 .tx_buffer_size = PCAN_UFD_TX_BUFFER_SIZE,
1417
1418 /* device callbacks */
1419 .intf_probe = pcan_usb_pro_probe, /* same as PCAN-USB Pro */
1420 .dev_init = pcan_usb_fd_init,
1421
1422 .dev_exit = pcan_usb_fd_exit,
1423 .dev_free = pcan_usb_fd_free,
1424 .dev_set_bus = pcan_usb_fd_set_bus,
1425 .dev_set_bittiming = pcan_usb_fd_set_bittiming_slow,
1426 .dev_set_data_bittiming = pcan_usb_fd_set_bittiming_fast,
1427 .dev_get_can_channel_id = pcan_usb_fd_get_can_channel_id,
1428 .dev_set_can_channel_id = pcan_usb_fd_set_can_channel_id,
1429 .dev_decode_buf = pcan_usb_fd_decode_buf,
1430 .dev_start = pcan_usb_fd_start,
1431 .dev_stop = pcan_usb_fd_stop,
1432 .dev_restart_async = pcan_usb_fd_restart_async,
1433 .dev_encode_msg = pcan_usb_fd_encode_msg,
1434
1435 .do_get_berr_counter = pcan_usb_fd_get_berr_counter,
1436 };
1437