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) 2013-2014 Stephane Grosjean <s.grosjean@peak-system.com>
6 */
7 #include <linux/netdevice.h>
8 #include <linux/usb.h>
9 #include <linux/module.h>
10 #include <linux/ethtool.h>
11
12 #include <linux/can.h>
13 #include <linux/can/dev.h>
14 #include <linux/can/error.h>
15 #include <linux/can/dev/peak_canfd.h>
16
17 #include "pcan_usb_core.h"
18 #include "pcan_usb_pro.h"
19
20 #define PCAN_USBPROFD_CHANNEL_COUNT 2
21 #define PCAN_USBFD_CHANNEL_COUNT 1
22
23 /* PCAN-USB Pro FD adapter internal clock (Hz) */
24 #define PCAN_UFD_CRYSTAL_HZ 80000000
25
26 #define PCAN_UFD_CMD_BUFFER_SIZE 512
27 #define PCAN_UFD_LOSPD_PKT_SIZE 64
28
29 /* PCAN-USB Pro FD command timeout (ms.) */
30 #define PCAN_UFD_CMD_TIMEOUT_MS 1000
31
32 /* PCAN-USB Pro FD rx/tx buffers size */
33 #define PCAN_UFD_RX_BUFFER_SIZE 2048
34 #define PCAN_UFD_TX_BUFFER_SIZE 512
35
36 /* read some versions info from the hw device */
37 struct __packed pcan_ufd_fw_info {
38 __le16 size_of; /* sizeof this */
39 __le16 type; /* type of this structure */
40 u8 hw_type; /* Type of hardware (HW_TYPE_xxx) */
41 u8 bl_version[3]; /* Bootloader version */
42 u8 hw_version; /* Hardware version (PCB) */
43 u8 fw_version[3]; /* Firmware version */
44 __le32 dev_id[2]; /* "device id" per CAN */
45 __le32 ser_no; /* S/N */
46 __le32 flags; /* special functions */
47 };
48
49 /* handle device specific info used by the netdevices */
50 struct pcan_usb_fd_if {
51 struct peak_usb_device *dev[PCAN_USB_MAX_CHANNEL];
52 struct pcan_ufd_fw_info fw_info;
53 struct peak_time_ref time_ref;
54 int cm_ignore_count;
55 int dev_opened_count;
56 };
57
58 /* device information */
59 struct pcan_usb_fd_device {
60 struct peak_usb_device dev;
61 struct can_berr_counter bec;
62 struct pcan_usb_fd_if *usb_if;
63 u8 *cmd_buffer_addr;
64 };
65
66 /* Extended USB commands (non uCAN commands) */
67
68 /* Clock Modes command */
69 #define PCAN_UFD_CMD_CLK_SET 0x80
70
71 #define PCAN_UFD_CLK_80MHZ 0x0
72 #define PCAN_UFD_CLK_60MHZ 0x1
73 #define PCAN_UFD_CLK_40MHZ 0x2
74 #define PCAN_UFD_CLK_30MHZ 0x3
75 #define PCAN_UFD_CLK_24MHZ 0x4
76 #define PCAN_UFD_CLK_20MHZ 0x5
77 #define PCAN_UFD_CLK_DEF PCAN_UFD_CLK_80MHZ
78
79 struct __packed pcan_ufd_clock {
80 __le16 opcode_channel;
81
82 u8 mode;
83 u8 unused[5];
84 };
85
86 /* LED control command */
87 #define PCAN_UFD_CMD_LED_SET 0x86
88
89 #define PCAN_UFD_LED_DEV 0x00
90 #define PCAN_UFD_LED_FAST 0x01
91 #define PCAN_UFD_LED_SLOW 0x02
92 #define PCAN_UFD_LED_ON 0x03
93 #define PCAN_UFD_LED_OFF 0x04
94 #define PCAN_UFD_LED_DEF PCAN_UFD_LED_DEV
95
96 struct __packed pcan_ufd_led {
97 __le16 opcode_channel;
98
99 u8 mode;
100 u8 unused[5];
101 };
102
103 /* Extended usage of uCAN commands CMD_xxx_xx_OPTION for PCAN-USB Pro FD */
104 #define PCAN_UFD_FLTEXT_CALIBRATION 0x8000
105
106 struct __packed pcan_ufd_options {
107 __le16 opcode_channel;
108
109 __le16 ucan_mask;
110 u16 unused;
111 __le16 usb_mask;
112 };
113
114 /* Extended usage of uCAN messages for PCAN-USB Pro FD */
115 #define PCAN_UFD_MSG_CALIBRATION 0x100
116
117 struct __packed pcan_ufd_ts_msg {
118 __le16 size;
119 __le16 type;
120 __le32 ts_low;
121 __le32 ts_high;
122 __le16 usb_frame_index;
123 u16 unused;
124 };
125
126 #define PCAN_UFD_MSG_OVERRUN 0x101
127
128 #define PCAN_UFD_OVMSG_CHANNEL(o) ((o)->channel & 0xf)
129
130 struct __packed pcan_ufd_ovr_msg {
131 __le16 size;
132 __le16 type;
133 __le32 ts_low;
134 __le32 ts_high;
135 u8 channel;
136 u8 unused[3];
137 };
138
pufd_omsg_get_channel(struct pcan_ufd_ovr_msg * om)139 static inline int pufd_omsg_get_channel(struct pcan_ufd_ovr_msg *om)
140 {
141 return om->channel & 0xf;
142 }
143
144 /* Clock mode frequency values */
145 static const u32 pcan_usb_fd_clk_freq[6] = {
146 [PCAN_UFD_CLK_80MHZ] = 80000000,
147 [PCAN_UFD_CLK_60MHZ] = 60000000,
148 [PCAN_UFD_CLK_40MHZ] = 40000000,
149 [PCAN_UFD_CLK_30MHZ] = 30000000,
150 [PCAN_UFD_CLK_24MHZ] = 24000000,
151 [PCAN_UFD_CLK_20MHZ] = 20000000
152 };
153
154 /* return a device USB interface */
155 static inline
pcan_usb_fd_dev_if(struct peak_usb_device * dev)156 struct pcan_usb_fd_if *pcan_usb_fd_dev_if(struct peak_usb_device *dev)
157 {
158 struct pcan_usb_fd_device *pdev =
159 container_of(dev, struct pcan_usb_fd_device, dev);
160 return pdev->usb_if;
161 }
162
163 /* return a device USB commands buffer */
pcan_usb_fd_cmd_buffer(struct peak_usb_device * dev)164 static inline void *pcan_usb_fd_cmd_buffer(struct peak_usb_device *dev)
165 {
166 struct pcan_usb_fd_device *pdev =
167 container_of(dev, struct pcan_usb_fd_device, dev);
168 return pdev->cmd_buffer_addr;
169 }
170
171 /* send PCAN-USB Pro FD commands synchronously */
pcan_usb_fd_send_cmd(struct peak_usb_device * dev,void * cmd_tail)172 static int pcan_usb_fd_send_cmd(struct peak_usb_device *dev, void *cmd_tail)
173 {
174 void *cmd_head = pcan_usb_fd_cmd_buffer(dev);
175 int err = 0;
176 u8 *packet_ptr;
177 int packet_len;
178 ptrdiff_t cmd_len;
179
180 /* usb device unregistered? */
181 if (!(dev->state & PCAN_USB_STATE_CONNECTED))
182 return 0;
183
184 /* if a packet is not filled completely by commands, the command list
185 * is terminated with an "end of collection" record.
186 */
187 cmd_len = cmd_tail - cmd_head;
188 if (cmd_len <= (PCAN_UFD_CMD_BUFFER_SIZE - sizeof(u64))) {
189 memset(cmd_tail, 0xff, sizeof(u64));
190 cmd_len += sizeof(u64);
191 }
192
193 packet_ptr = cmd_head;
194 packet_len = cmd_len;
195
196 /* firmware is not able to re-assemble 512 bytes buffer in full-speed */
197 if (unlikely(dev->udev->speed != USB_SPEED_HIGH))
198 packet_len = min(packet_len, PCAN_UFD_LOSPD_PKT_SIZE);
199
200 do {
201 err = usb_bulk_msg(dev->udev,
202 usb_sndbulkpipe(dev->udev,
203 PCAN_USBPRO_EP_CMDOUT),
204 packet_ptr, packet_len,
205 NULL, PCAN_UFD_CMD_TIMEOUT_MS);
206 if (err) {
207 netdev_err(dev->netdev,
208 "sending command failure: %d\n", err);
209 break;
210 }
211
212 packet_ptr += packet_len;
213 cmd_len -= packet_len;
214
215 if (cmd_len < PCAN_UFD_LOSPD_PKT_SIZE)
216 packet_len = cmd_len;
217
218 } while (packet_len > 0);
219
220 return err;
221 }
222
223 /* 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)224 static int pcan_usb_fd_build_restart_cmd(struct peak_usb_device *dev, u8 *buf)
225 {
226 struct pucan_wr_err_cnt *prc;
227 struct pucan_command *cmd;
228 u8 *pc = buf;
229
230 /* 1st, reset error counters: */
231 prc = (struct pucan_wr_err_cnt *)pc;
232 prc->opcode_channel = pucan_cmd_opcode_channel(dev->ctrl_idx,
233 PUCAN_CMD_WR_ERR_CNT);
234
235 /* select both counters */
236 prc->sel_mask = cpu_to_le16(PUCAN_WRERRCNT_TE|PUCAN_WRERRCNT_RE);
237
238 /* and reset their values */
239 prc->tx_counter = 0;
240 prc->rx_counter = 0;
241
242 /* moves the pointer forward */
243 pc += sizeof(struct pucan_wr_err_cnt);
244
245 /* add command to switch from ISO to non-ISO mode, if fw allows it */
246 if (dev->can.ctrlmode_supported & CAN_CTRLMODE_FD_NON_ISO) {
247 struct pucan_options *puo = (struct pucan_options *)pc;
248
249 puo->opcode_channel =
250 (dev->can.ctrlmode & CAN_CTRLMODE_FD_NON_ISO) ?
251 pucan_cmd_opcode_channel(dev->ctrl_idx,
252 PUCAN_CMD_CLR_DIS_OPTION) :
253 pucan_cmd_opcode_channel(dev->ctrl_idx,
254 PUCAN_CMD_SET_EN_OPTION);
255
256 puo->options = cpu_to_le16(PUCAN_OPTION_CANDFDISO);
257
258 /* to be sure that no other extended bits will be taken into
259 * account
260 */
261 puo->unused = 0;
262
263 /* moves the pointer forward */
264 pc += sizeof(struct pucan_options);
265 }
266
267 /* next, go back to operational mode */
268 cmd = (struct pucan_command *)pc;
269 cmd->opcode_channel = pucan_cmd_opcode_channel(dev->ctrl_idx,
270 (dev->can.ctrlmode & CAN_CTRLMODE_LISTENONLY) ?
271 PUCAN_CMD_LISTEN_ONLY_MODE :
272 PUCAN_CMD_NORMAL_MODE);
273 pc += sizeof(struct pucan_command);
274
275 return pc - buf;
276 }
277
278 /* set CAN bus on/off */
pcan_usb_fd_set_bus(struct peak_usb_device * dev,u8 onoff)279 static int pcan_usb_fd_set_bus(struct peak_usb_device *dev, u8 onoff)
280 {
281 u8 *pc = pcan_usb_fd_cmd_buffer(dev);
282 int l;
283
284 if (onoff) {
285 /* build the cmds list to enter operational mode */
286 l = pcan_usb_fd_build_restart_cmd(dev, pc);
287 } else {
288 struct pucan_command *cmd = (struct pucan_command *)pc;
289
290 /* build cmd to go back to reset mode */
291 cmd->opcode_channel = pucan_cmd_opcode_channel(dev->ctrl_idx,
292 PUCAN_CMD_RESET_MODE);
293 l = sizeof(struct pucan_command);
294 }
295
296 /* send the command */
297 return pcan_usb_fd_send_cmd(dev, pc + l);
298 }
299
300 /* set filtering masks:
301 *
302 * idx in range [0..63] selects a row #idx, all rows otherwise
303 * mask in range [0..0xffffffff] defines up to 32 CANIDs in the row(s)
304 *
305 * Each bit of this 64 x 32 bits array defines a CANID value:
306 *
307 * bit[i,j] = 1 implies that CANID=(i x 32)+j will be received, while
308 * bit[i,j] = 0 implies that CANID=(i x 32)+j will be discarded.
309 */
pcan_usb_fd_set_filter_std(struct peak_usb_device * dev,int idx,u32 mask)310 static int pcan_usb_fd_set_filter_std(struct peak_usb_device *dev, int idx,
311 u32 mask)
312 {
313 struct pucan_filter_std *cmd = pcan_usb_fd_cmd_buffer(dev);
314 int i, n;
315
316 /* select all rows when idx is out of range [0..63] */
317 if ((idx < 0) || (idx >= (1 << PUCAN_FLTSTD_ROW_IDX_BITS))) {
318 n = 1 << PUCAN_FLTSTD_ROW_IDX_BITS;
319 idx = 0;
320
321 /* select the row (and only the row) otherwise */
322 } else {
323 n = idx + 1;
324 }
325
326 for (i = idx; i < n; i++, cmd++) {
327 cmd->opcode_channel = pucan_cmd_opcode_channel(dev->ctrl_idx,
328 PUCAN_CMD_FILTER_STD);
329 cmd->idx = cpu_to_le16(i);
330 cmd->mask = cpu_to_le32(mask);
331 }
332
333 /* send the command */
334 return pcan_usb_fd_send_cmd(dev, cmd);
335 }
336
337 /* set/unset options
338 *
339 * onoff set(1)/unset(0) options
340 * mask each bit defines a kind of options to set/unset
341 */
pcan_usb_fd_set_options(struct peak_usb_device * dev,bool onoff,u16 ucan_mask,u16 usb_mask)342 static int pcan_usb_fd_set_options(struct peak_usb_device *dev,
343 bool onoff, u16 ucan_mask, u16 usb_mask)
344 {
345 struct pcan_ufd_options *cmd = pcan_usb_fd_cmd_buffer(dev);
346
347 cmd->opcode_channel = pucan_cmd_opcode_channel(dev->ctrl_idx,
348 (onoff) ? PUCAN_CMD_SET_EN_OPTION :
349 PUCAN_CMD_CLR_DIS_OPTION);
350
351 cmd->ucan_mask = cpu_to_le16(ucan_mask);
352 cmd->usb_mask = cpu_to_le16(usb_mask);
353
354 /* send the command */
355 return pcan_usb_fd_send_cmd(dev, ++cmd);
356 }
357
358 /* setup LED control */
pcan_usb_fd_set_can_led(struct peak_usb_device * dev,u8 led_mode)359 static int pcan_usb_fd_set_can_led(struct peak_usb_device *dev, u8 led_mode)
360 {
361 struct pcan_ufd_led *cmd = pcan_usb_fd_cmd_buffer(dev);
362
363 cmd->opcode_channel = pucan_cmd_opcode_channel(dev->ctrl_idx,
364 PCAN_UFD_CMD_LED_SET);
365 cmd->mode = led_mode;
366
367 /* send the command */
368 return pcan_usb_fd_send_cmd(dev, ++cmd);
369 }
370
371 /* set CAN clock domain */
pcan_usb_fd_set_clock_domain(struct peak_usb_device * dev,u8 clk_mode)372 static int pcan_usb_fd_set_clock_domain(struct peak_usb_device *dev,
373 u8 clk_mode)
374 {
375 struct pcan_ufd_clock *cmd = pcan_usb_fd_cmd_buffer(dev);
376
377 cmd->opcode_channel = pucan_cmd_opcode_channel(dev->ctrl_idx,
378 PCAN_UFD_CMD_CLK_SET);
379 cmd->mode = clk_mode;
380
381 /* send the command */
382 return pcan_usb_fd_send_cmd(dev, ++cmd);
383 }
384
385 /* set bittiming for CAN and CAN-FD header */
pcan_usb_fd_set_bittiming_slow(struct peak_usb_device * dev,struct can_bittiming * bt)386 static int pcan_usb_fd_set_bittiming_slow(struct peak_usb_device *dev,
387 struct can_bittiming *bt)
388 {
389 struct pucan_timing_slow *cmd = pcan_usb_fd_cmd_buffer(dev);
390
391 cmd->opcode_channel = pucan_cmd_opcode_channel(dev->ctrl_idx,
392 PUCAN_CMD_TIMING_SLOW);
393 cmd->sjw_t = PUCAN_TSLOW_SJW_T(bt->sjw - 1,
394 dev->can.ctrlmode & CAN_CTRLMODE_3_SAMPLES);
395
396 cmd->tseg2 = PUCAN_TSLOW_TSEG2(bt->phase_seg2 - 1);
397 cmd->tseg1 = PUCAN_TSLOW_TSEG1(bt->prop_seg + bt->phase_seg1 - 1);
398 cmd->brp = cpu_to_le16(PUCAN_TSLOW_BRP(bt->brp - 1));
399
400 cmd->ewl = 96; /* default */
401
402 /* send the command */
403 return pcan_usb_fd_send_cmd(dev, ++cmd);
404 }
405
406 /* set CAN-FD bittiming for data */
pcan_usb_fd_set_bittiming_fast(struct peak_usb_device * dev,struct can_bittiming * bt)407 static int pcan_usb_fd_set_bittiming_fast(struct peak_usb_device *dev,
408 struct can_bittiming *bt)
409 {
410 struct pucan_timing_fast *cmd = pcan_usb_fd_cmd_buffer(dev);
411
412 cmd->opcode_channel = pucan_cmd_opcode_channel(dev->ctrl_idx,
413 PUCAN_CMD_TIMING_FAST);
414 cmd->sjw = PUCAN_TFAST_SJW(bt->sjw - 1);
415 cmd->tseg2 = PUCAN_TFAST_TSEG2(bt->phase_seg2 - 1);
416 cmd->tseg1 = PUCAN_TFAST_TSEG1(bt->prop_seg + bt->phase_seg1 - 1);
417 cmd->brp = cpu_to_le16(PUCAN_TFAST_BRP(bt->brp - 1));
418
419 /* send the command */
420 return pcan_usb_fd_send_cmd(dev, ++cmd);
421 }
422
423 /* handle restart but in asynchronously way
424 * (uses PCAN-USB Pro code to complete asynchronous request)
425 */
pcan_usb_fd_restart_async(struct peak_usb_device * dev,struct urb * urb,u8 * buf)426 static int pcan_usb_fd_restart_async(struct peak_usb_device *dev,
427 struct urb *urb, u8 *buf)
428 {
429 u8 *pc = buf;
430
431 /* build the entire cmds list in the provided buffer, to go back into
432 * operational mode.
433 */
434 pc += pcan_usb_fd_build_restart_cmd(dev, pc);
435
436 /* add EOC */
437 memset(pc, 0xff, sizeof(struct pucan_command));
438 pc += sizeof(struct pucan_command);
439
440 /* complete the URB */
441 usb_fill_bulk_urb(urb, dev->udev,
442 usb_sndbulkpipe(dev->udev, PCAN_USBPRO_EP_CMDOUT),
443 buf, pc - buf,
444 pcan_usb_pro_restart_complete, dev);
445
446 /* and submit it. */
447 return usb_submit_urb(urb, GFP_ATOMIC);
448 }
449
pcan_usb_fd_drv_loaded(struct peak_usb_device * dev,bool loaded)450 static int pcan_usb_fd_drv_loaded(struct peak_usb_device *dev, bool loaded)
451 {
452 struct pcan_usb_fd_device *pdev =
453 container_of(dev, struct pcan_usb_fd_device, dev);
454
455 pdev->cmd_buffer_addr[0] = 0;
456 pdev->cmd_buffer_addr[1] = !!loaded;
457
458 return pcan_usb_pro_send_req(dev,
459 PCAN_USBPRO_REQ_FCT,
460 PCAN_USBPRO_FCT_DRVLD,
461 pdev->cmd_buffer_addr,
462 PCAN_USBPRO_FCT_DRVLD_REQ_LEN);
463 }
464
pcan_usb_fd_decode_canmsg(struct pcan_usb_fd_if * usb_if,struct pucan_msg * rx_msg)465 static int pcan_usb_fd_decode_canmsg(struct pcan_usb_fd_if *usb_if,
466 struct pucan_msg *rx_msg)
467 {
468 struct pucan_rx_msg *rm = (struct pucan_rx_msg *)rx_msg;
469 struct peak_usb_device *dev;
470 struct net_device *netdev;
471 struct canfd_frame *cfd;
472 struct sk_buff *skb;
473 const u16 rx_msg_flags = le16_to_cpu(rm->flags);
474
475 if (pucan_msg_get_channel(rm) >= ARRAY_SIZE(usb_if->dev))
476 return -ENOMEM;
477
478 dev = usb_if->dev[pucan_msg_get_channel(rm)];
479 netdev = dev->netdev;
480
481 if (rx_msg_flags & PUCAN_MSG_EXT_DATA_LEN) {
482 /* CANFD frame case */
483 skb = alloc_canfd_skb(netdev, &cfd);
484 if (!skb)
485 return -ENOMEM;
486
487 if (rx_msg_flags & PUCAN_MSG_BITRATE_SWITCH)
488 cfd->flags |= CANFD_BRS;
489
490 if (rx_msg_flags & PUCAN_MSG_ERROR_STATE_IND)
491 cfd->flags |= CANFD_ESI;
492
493 cfd->len = can_fd_dlc2len(pucan_msg_get_dlc(rm));
494 } else {
495 /* CAN 2.0 frame case */
496 skb = alloc_can_skb(netdev, (struct can_frame **)&cfd);
497 if (!skb)
498 return -ENOMEM;
499
500 can_frame_set_cc_len((struct can_frame *)cfd,
501 pucan_msg_get_dlc(rm),
502 dev->can.ctrlmode);
503 }
504
505 cfd->can_id = le32_to_cpu(rm->can_id);
506
507 if (rx_msg_flags & PUCAN_MSG_EXT_ID)
508 cfd->can_id |= CAN_EFF_FLAG;
509
510 if (rx_msg_flags & PUCAN_MSG_RTR)
511 cfd->can_id |= CAN_RTR_FLAG;
512 else
513 memcpy(cfd->data, rm->d, cfd->len);
514
515 netdev->stats.rx_packets++;
516 netdev->stats.rx_bytes += cfd->len;
517
518 peak_usb_netif_rx_64(skb, le32_to_cpu(rm->ts_low),
519 le32_to_cpu(rm->ts_high));
520
521 return 0;
522 }
523
524 /* handle uCAN status message */
pcan_usb_fd_decode_status(struct pcan_usb_fd_if * usb_if,struct pucan_msg * rx_msg)525 static int pcan_usb_fd_decode_status(struct pcan_usb_fd_if *usb_if,
526 struct pucan_msg *rx_msg)
527 {
528 struct pucan_status_msg *sm = (struct pucan_status_msg *)rx_msg;
529 struct pcan_usb_fd_device *pdev;
530 enum can_state new_state = CAN_STATE_ERROR_ACTIVE;
531 enum can_state rx_state, tx_state;
532 struct peak_usb_device *dev;
533 struct net_device *netdev;
534 struct can_frame *cf;
535 struct sk_buff *skb;
536
537 if (pucan_stmsg_get_channel(sm) >= ARRAY_SIZE(usb_if->dev))
538 return -ENOMEM;
539
540 dev = usb_if->dev[pucan_stmsg_get_channel(sm)];
541 pdev = container_of(dev, struct pcan_usb_fd_device, dev);
542 netdev = dev->netdev;
543
544 /* nothing should be sent while in BUS_OFF state */
545 if (dev->can.state == CAN_STATE_BUS_OFF)
546 return 0;
547
548 if (sm->channel_p_w_b & PUCAN_BUS_BUSOFF) {
549 new_state = CAN_STATE_BUS_OFF;
550 } else if (sm->channel_p_w_b & PUCAN_BUS_PASSIVE) {
551 new_state = CAN_STATE_ERROR_PASSIVE;
552 } else if (sm->channel_p_w_b & PUCAN_BUS_WARNING) {
553 new_state = CAN_STATE_ERROR_WARNING;
554 } else {
555 /* back to (or still in) ERROR_ACTIVE state */
556 new_state = CAN_STATE_ERROR_ACTIVE;
557 pdev->bec.txerr = 0;
558 pdev->bec.rxerr = 0;
559 }
560
561 /* state hasn't changed */
562 if (new_state == dev->can.state)
563 return 0;
564
565 /* handle bus state change */
566 tx_state = (pdev->bec.txerr >= pdev->bec.rxerr) ? new_state : 0;
567 rx_state = (pdev->bec.txerr <= pdev->bec.rxerr) ? new_state : 0;
568
569 /* allocate an skb to store the error frame */
570 skb = alloc_can_err_skb(netdev, &cf);
571 can_change_state(netdev, cf, tx_state, rx_state);
572
573 /* things must be done even in case of OOM */
574 if (new_state == CAN_STATE_BUS_OFF)
575 can_bus_off(netdev);
576
577 if (!skb)
578 return -ENOMEM;
579
580 netdev->stats.rx_packets++;
581 netdev->stats.rx_bytes += cf->len;
582
583 peak_usb_netif_rx_64(skb, le32_to_cpu(sm->ts_low),
584 le32_to_cpu(sm->ts_high));
585
586 return 0;
587 }
588
589 /* handle uCAN error message */
pcan_usb_fd_decode_error(struct pcan_usb_fd_if * usb_if,struct pucan_msg * rx_msg)590 static int pcan_usb_fd_decode_error(struct pcan_usb_fd_if *usb_if,
591 struct pucan_msg *rx_msg)
592 {
593 struct pucan_error_msg *er = (struct pucan_error_msg *)rx_msg;
594 struct pcan_usb_fd_device *pdev;
595 struct peak_usb_device *dev;
596
597 if (pucan_ermsg_get_channel(er) >= ARRAY_SIZE(usb_if->dev))
598 return -EINVAL;
599
600 dev = usb_if->dev[pucan_ermsg_get_channel(er)];
601 pdev = container_of(dev, struct pcan_usb_fd_device, dev);
602
603 /* keep a trace of tx and rx error counters for later use */
604 pdev->bec.txerr = er->tx_err_cnt;
605 pdev->bec.rxerr = er->rx_err_cnt;
606
607 return 0;
608 }
609
610 /* handle uCAN overrun message */
pcan_usb_fd_decode_overrun(struct pcan_usb_fd_if * usb_if,struct pucan_msg * rx_msg)611 static int pcan_usb_fd_decode_overrun(struct pcan_usb_fd_if *usb_if,
612 struct pucan_msg *rx_msg)
613 {
614 struct pcan_ufd_ovr_msg *ov = (struct pcan_ufd_ovr_msg *)rx_msg;
615 struct peak_usb_device *dev;
616 struct net_device *netdev;
617 struct can_frame *cf;
618 struct sk_buff *skb;
619
620 if (pufd_omsg_get_channel(ov) >= ARRAY_SIZE(usb_if->dev))
621 return -EINVAL;
622
623 dev = usb_if->dev[pufd_omsg_get_channel(ov)];
624 netdev = dev->netdev;
625
626 /* allocate an skb to store the error frame */
627 skb = alloc_can_err_skb(netdev, &cf);
628 if (!skb)
629 return -ENOMEM;
630
631 cf->can_id |= CAN_ERR_CRTL;
632 cf->data[1] |= CAN_ERR_CRTL_RX_OVERFLOW;
633
634 peak_usb_netif_rx_64(skb, le32_to_cpu(ov->ts_low),
635 le32_to_cpu(ov->ts_high));
636
637 netdev->stats.rx_over_errors++;
638 netdev->stats.rx_errors++;
639
640 return 0;
641 }
642
643 /* handle USB calibration message */
pcan_usb_fd_decode_ts(struct pcan_usb_fd_if * usb_if,struct pucan_msg * rx_msg)644 static void pcan_usb_fd_decode_ts(struct pcan_usb_fd_if *usb_if,
645 struct pucan_msg *rx_msg)
646 {
647 struct pcan_ufd_ts_msg *ts = (struct pcan_ufd_ts_msg *)rx_msg;
648
649 /* should wait until clock is stabilized */
650 if (usb_if->cm_ignore_count > 0)
651 usb_if->cm_ignore_count--;
652 else
653 peak_usb_set_ts_now(&usb_if->time_ref, le32_to_cpu(ts->ts_low));
654 }
655
656 /* callback for bulk IN urb */
pcan_usb_fd_decode_buf(struct peak_usb_device * dev,struct urb * urb)657 static int pcan_usb_fd_decode_buf(struct peak_usb_device *dev, struct urb *urb)
658 {
659 struct pcan_usb_fd_if *usb_if = pcan_usb_fd_dev_if(dev);
660 struct net_device *netdev = dev->netdev;
661 struct pucan_msg *rx_msg;
662 u8 *msg_ptr, *msg_end;
663 int err = 0;
664
665 /* loop reading all the records from the incoming message */
666 msg_ptr = urb->transfer_buffer;
667 msg_end = urb->transfer_buffer + urb->actual_length;
668 for (; msg_ptr < msg_end;) {
669 u16 rx_msg_type, rx_msg_size;
670
671 rx_msg = (struct pucan_msg *)msg_ptr;
672 if (!rx_msg->size) {
673 /* null packet found: end of list */
674 break;
675 }
676
677 rx_msg_size = le16_to_cpu(rx_msg->size);
678 rx_msg_type = le16_to_cpu(rx_msg->type);
679
680 /* check if the record goes out of current packet */
681 if (msg_ptr + rx_msg_size > msg_end) {
682 netdev_err(netdev,
683 "got frag rec: should inc usb rx buf sze\n");
684 err = -EBADMSG;
685 break;
686 }
687
688 switch (rx_msg_type) {
689 case PUCAN_MSG_CAN_RX:
690 err = pcan_usb_fd_decode_canmsg(usb_if, rx_msg);
691 if (err < 0)
692 goto fail;
693 break;
694
695 case PCAN_UFD_MSG_CALIBRATION:
696 pcan_usb_fd_decode_ts(usb_if, rx_msg);
697 break;
698
699 case PUCAN_MSG_ERROR:
700 err = pcan_usb_fd_decode_error(usb_if, rx_msg);
701 if (err < 0)
702 goto fail;
703 break;
704
705 case PUCAN_MSG_STATUS:
706 err = pcan_usb_fd_decode_status(usb_if, rx_msg);
707 if (err < 0)
708 goto fail;
709 break;
710
711 case PCAN_UFD_MSG_OVERRUN:
712 err = pcan_usb_fd_decode_overrun(usb_if, rx_msg);
713 if (err < 0)
714 goto fail;
715 break;
716
717 default:
718 netdev_err(netdev,
719 "unhandled msg type 0x%02x (%d): ignored\n",
720 rx_msg_type, rx_msg_type);
721 break;
722 }
723
724 msg_ptr += rx_msg_size;
725 }
726
727 fail:
728 if (err)
729 pcan_dump_mem("received msg",
730 urb->transfer_buffer, urb->actual_length);
731 return err;
732 }
733
734 /* CAN/CANFD frames encoding callback */
pcan_usb_fd_encode_msg(struct peak_usb_device * dev,struct sk_buff * skb,u8 * obuf,size_t * size)735 static int pcan_usb_fd_encode_msg(struct peak_usb_device *dev,
736 struct sk_buff *skb, u8 *obuf, size_t *size)
737 {
738 struct pucan_tx_msg *tx_msg = (struct pucan_tx_msg *)obuf;
739 struct canfd_frame *cfd = (struct canfd_frame *)skb->data;
740 u16 tx_msg_size, tx_msg_flags;
741 u8 dlc;
742
743 if (cfd->len > CANFD_MAX_DLEN)
744 return -EINVAL;
745
746 tx_msg_size = ALIGN(sizeof(struct pucan_tx_msg) + cfd->len, 4);
747 tx_msg->size = cpu_to_le16(tx_msg_size);
748 tx_msg->type = cpu_to_le16(PUCAN_MSG_CAN_TX);
749
750 tx_msg_flags = 0;
751 if (cfd->can_id & CAN_EFF_FLAG) {
752 tx_msg_flags |= PUCAN_MSG_EXT_ID;
753 tx_msg->can_id = cpu_to_le32(cfd->can_id & CAN_EFF_MASK);
754 } else {
755 tx_msg->can_id = cpu_to_le32(cfd->can_id & CAN_SFF_MASK);
756 }
757
758 if (can_is_canfd_skb(skb)) {
759 /* considering a CANFD frame */
760 dlc = can_fd_len2dlc(cfd->len);
761
762 tx_msg_flags |= PUCAN_MSG_EXT_DATA_LEN;
763
764 if (cfd->flags & CANFD_BRS)
765 tx_msg_flags |= PUCAN_MSG_BITRATE_SWITCH;
766
767 if (cfd->flags & CANFD_ESI)
768 tx_msg_flags |= PUCAN_MSG_ERROR_STATE_IND;
769 } else {
770 /* CAND 2.0 frames */
771 dlc = can_get_cc_dlc((struct can_frame *)cfd,
772 dev->can.ctrlmode);
773
774 if (cfd->can_id & CAN_RTR_FLAG)
775 tx_msg_flags |= PUCAN_MSG_RTR;
776 }
777
778 /* Single-Shot frame */
779 if (dev->can.ctrlmode & CAN_CTRLMODE_ONE_SHOT)
780 tx_msg_flags |= PUCAN_MSG_SINGLE_SHOT;
781
782 tx_msg->flags = cpu_to_le16(tx_msg_flags);
783 tx_msg->channel_dlc = PUCAN_MSG_CHANNEL_DLC(dev->ctrl_idx, dlc);
784 memcpy(tx_msg->d, cfd->data, cfd->len);
785
786 /* add null size message to tag the end (messages are 32-bits aligned)
787 */
788 tx_msg = (struct pucan_tx_msg *)(obuf + tx_msg_size);
789
790 tx_msg->size = 0;
791
792 /* set the whole size of the USB packet to send */
793 *size = tx_msg_size + sizeof(u32);
794
795 return 0;
796 }
797
798 /* start the interface (last chance before set bus on) */
pcan_usb_fd_start(struct peak_usb_device * dev)799 static int pcan_usb_fd_start(struct peak_usb_device *dev)
800 {
801 struct pcan_usb_fd_device *pdev =
802 container_of(dev, struct pcan_usb_fd_device, dev);
803 int err;
804
805 /* set filter mode: all acceptance */
806 err = pcan_usb_fd_set_filter_std(dev, -1, 0xffffffff);
807 if (err)
808 return err;
809
810 /* opening first device: */
811 if (pdev->usb_if->dev_opened_count == 0) {
812 /* reset time_ref */
813 peak_usb_init_time_ref(&pdev->usb_if->time_ref,
814 &pcan_usb_pro_fd);
815
816 /* enable USB calibration messages */
817 err = pcan_usb_fd_set_options(dev, 1,
818 PUCAN_OPTION_ERROR,
819 PCAN_UFD_FLTEXT_CALIBRATION);
820 }
821
822 pdev->usb_if->dev_opened_count++;
823
824 /* reset cached error counters */
825 pdev->bec.txerr = 0;
826 pdev->bec.rxerr = 0;
827
828 return err;
829 }
830
831 /* 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)832 static int pcan_usb_fd_get_berr_counter(const struct net_device *netdev,
833 struct can_berr_counter *bec)
834 {
835 struct peak_usb_device *dev = netdev_priv(netdev);
836 struct pcan_usb_fd_device *pdev =
837 container_of(dev, struct pcan_usb_fd_device, dev);
838
839 *bec = pdev->bec;
840
841 /* must return 0 */
842 return 0;
843 }
844
845 /* stop interface (last chance before set bus off) */
pcan_usb_fd_stop(struct peak_usb_device * dev)846 static int pcan_usb_fd_stop(struct peak_usb_device *dev)
847 {
848 struct pcan_usb_fd_device *pdev =
849 container_of(dev, struct pcan_usb_fd_device, dev);
850
851 /* turn off special msgs for that interface if no other dev opened */
852 if (pdev->usb_if->dev_opened_count == 1)
853 pcan_usb_fd_set_options(dev, 0,
854 PUCAN_OPTION_ERROR,
855 PCAN_UFD_FLTEXT_CALIBRATION);
856 pdev->usb_if->dev_opened_count--;
857
858 return 0;
859 }
860
861 /* called when probing, to initialize a device object */
pcan_usb_fd_init(struct peak_usb_device * dev)862 static int pcan_usb_fd_init(struct peak_usb_device *dev)
863 {
864 struct pcan_usb_fd_device *pdev =
865 container_of(dev, struct pcan_usb_fd_device, dev);
866 int i, err = -ENOMEM;
867
868 /* do this for 1st channel only */
869 if (!dev->prev_siblings) {
870 /* allocate netdevices common structure attached to first one */
871 pdev->usb_if = kzalloc(sizeof(*pdev->usb_if), GFP_KERNEL);
872 if (!pdev->usb_if)
873 goto err_out;
874
875 /* allocate command buffer once for all for the interface */
876 pdev->cmd_buffer_addr = kzalloc(PCAN_UFD_CMD_BUFFER_SIZE,
877 GFP_KERNEL);
878 if (!pdev->cmd_buffer_addr)
879 goto err_out_1;
880
881 /* number of ts msgs to ignore before taking one into account */
882 pdev->usb_if->cm_ignore_count = 5;
883
884 err = pcan_usb_pro_send_req(dev, PCAN_USBPRO_REQ_INFO,
885 PCAN_USBPRO_INFO_FW,
886 &pdev->usb_if->fw_info,
887 sizeof(pdev->usb_if->fw_info));
888 if (err) {
889 dev_err(dev->netdev->dev.parent,
890 "unable to read %s firmware info (err %d)\n",
891 dev->adapter->name, err);
892 goto err_out_2;
893 }
894
895 /* explicit use of dev_xxx() instead of netdev_xxx() here:
896 * information displayed are related to the device itself, not
897 * to the canx (channel) device.
898 */
899 dev_info(dev->netdev->dev.parent,
900 "PEAK-System %s v%u fw v%u.%u.%u (%u channels)\n",
901 dev->adapter->name, pdev->usb_if->fw_info.hw_version,
902 pdev->usb_if->fw_info.fw_version[0],
903 pdev->usb_if->fw_info.fw_version[1],
904 pdev->usb_if->fw_info.fw_version[2],
905 dev->adapter->ctrl_count);
906
907 /* check for ability to switch between ISO/non-ISO modes */
908 if (pdev->usb_if->fw_info.fw_version[0] >= 2) {
909 /* firmware >= 2.x supports ISO/non-ISO switching */
910 dev->can.ctrlmode_supported |= CAN_CTRLMODE_FD_NON_ISO;
911 } else {
912 /* firmware < 2.x only supports fixed(!) non-ISO */
913 dev->can.ctrlmode |= CAN_CTRLMODE_FD_NON_ISO;
914 }
915
916 /* tell the hardware the can driver is running */
917 err = pcan_usb_fd_drv_loaded(dev, 1);
918 if (err) {
919 dev_err(dev->netdev->dev.parent,
920 "unable to tell %s driver is loaded (err %d)\n",
921 dev->adapter->name, err);
922 goto err_out_2;
923 }
924 } else {
925 /* otherwise, simply copy previous sibling's values */
926 struct pcan_usb_fd_device *ppdev =
927 container_of(dev->prev_siblings,
928 struct pcan_usb_fd_device, dev);
929
930 pdev->usb_if = ppdev->usb_if;
931 pdev->cmd_buffer_addr = ppdev->cmd_buffer_addr;
932
933 /* do a copy of the ctrlmode[_supported] too */
934 dev->can.ctrlmode = ppdev->dev.can.ctrlmode;
935 dev->can.ctrlmode_supported = ppdev->dev.can.ctrlmode_supported;
936 }
937
938 pdev->usb_if->dev[dev->ctrl_idx] = dev;
939 dev->device_number =
940 le32_to_cpu(pdev->usb_if->fw_info.dev_id[dev->ctrl_idx]);
941
942 /* set clock domain */
943 for (i = 0; i < ARRAY_SIZE(pcan_usb_fd_clk_freq); i++)
944 if (dev->adapter->clock.freq == pcan_usb_fd_clk_freq[i])
945 break;
946
947 if (i >= ARRAY_SIZE(pcan_usb_fd_clk_freq)) {
948 dev_warn(dev->netdev->dev.parent,
949 "incompatible clock frequencies\n");
950 err = -EINVAL;
951 goto err_out_2;
952 }
953
954 pcan_usb_fd_set_clock_domain(dev, i);
955
956 /* set LED in default state (end of init phase) */
957 pcan_usb_fd_set_can_led(dev, PCAN_UFD_LED_DEF);
958
959 return 0;
960
961 err_out_2:
962 kfree(pdev->cmd_buffer_addr);
963 err_out_1:
964 kfree(pdev->usb_if);
965 err_out:
966 return err;
967 }
968
969 /* called when driver module is being unloaded */
pcan_usb_fd_exit(struct peak_usb_device * dev)970 static void pcan_usb_fd_exit(struct peak_usb_device *dev)
971 {
972 struct pcan_usb_fd_device *pdev =
973 container_of(dev, struct pcan_usb_fd_device, dev);
974
975 /* when rmmod called before unplug and if down, should reset things
976 * before leaving
977 */
978 if (dev->can.state != CAN_STATE_STOPPED) {
979 /* set bus off on the corresponding channel */
980 pcan_usb_fd_set_bus(dev, 0);
981 }
982
983 /* switch off corresponding CAN LEDs */
984 pcan_usb_fd_set_can_led(dev, PCAN_UFD_LED_OFF);
985
986 /* if channel #0 (only) */
987 if (dev->ctrl_idx == 0) {
988 /* turn off calibration message if any device were opened */
989 if (pdev->usb_if->dev_opened_count > 0)
990 pcan_usb_fd_set_options(dev, 0,
991 PUCAN_OPTION_ERROR,
992 PCAN_UFD_FLTEXT_CALIBRATION);
993
994 /* tell USB adapter that the driver is being unloaded */
995 pcan_usb_fd_drv_loaded(dev, 0);
996 }
997 }
998
999 /* called when the USB adapter is unplugged */
pcan_usb_fd_free(struct peak_usb_device * dev)1000 static void pcan_usb_fd_free(struct peak_usb_device *dev)
1001 {
1002 /* last device: can free shared objects now */
1003 if (!dev->prev_siblings && !dev->next_siblings) {
1004 struct pcan_usb_fd_device *pdev =
1005 container_of(dev, struct pcan_usb_fd_device, dev);
1006
1007 /* free commands buffer */
1008 kfree(pdev->cmd_buffer_addr);
1009
1010 /* free usb interface object */
1011 kfree(pdev->usb_if);
1012 }
1013 }
1014
1015 /* blink LED's */
pcan_usb_fd_set_phys_id(struct net_device * netdev,enum ethtool_phys_id_state state)1016 static int pcan_usb_fd_set_phys_id(struct net_device *netdev,
1017 enum ethtool_phys_id_state state)
1018 {
1019 struct peak_usb_device *dev = netdev_priv(netdev);
1020 int err = 0;
1021
1022 switch (state) {
1023 case ETHTOOL_ID_ACTIVE:
1024 err = pcan_usb_fd_set_can_led(dev, PCAN_UFD_LED_FAST);
1025 break;
1026 case ETHTOOL_ID_INACTIVE:
1027 err = pcan_usb_fd_set_can_led(dev, PCAN_UFD_LED_DEF);
1028 break;
1029 default:
1030 break;
1031 }
1032
1033 return err;
1034 }
1035
1036 static const struct ethtool_ops pcan_usb_fd_ethtool_ops = {
1037 .set_phys_id = pcan_usb_fd_set_phys_id,
1038 };
1039
1040 /* describes the PCAN-USB FD adapter */
1041 static const struct can_bittiming_const pcan_usb_fd_const = {
1042 .name = "pcan_usb_fd",
1043 .tseg1_min = 1,
1044 .tseg1_max = (1 << PUCAN_TSLOW_TSGEG1_BITS),
1045 .tseg2_min = 1,
1046 .tseg2_max = (1 << PUCAN_TSLOW_TSGEG2_BITS),
1047 .sjw_max = (1 << PUCAN_TSLOW_SJW_BITS),
1048 .brp_min = 1,
1049 .brp_max = (1 << PUCAN_TSLOW_BRP_BITS),
1050 .brp_inc = 1,
1051 };
1052
1053 static const struct can_bittiming_const pcan_usb_fd_data_const = {
1054 .name = "pcan_usb_fd",
1055 .tseg1_min = 1,
1056 .tseg1_max = (1 << PUCAN_TFAST_TSGEG1_BITS),
1057 .tseg2_min = 1,
1058 .tseg2_max = (1 << PUCAN_TFAST_TSGEG2_BITS),
1059 .sjw_max = (1 << PUCAN_TFAST_SJW_BITS),
1060 .brp_min = 1,
1061 .brp_max = (1 << PUCAN_TFAST_BRP_BITS),
1062 .brp_inc = 1,
1063 };
1064
1065 const struct peak_usb_adapter pcan_usb_fd = {
1066 .name = "PCAN-USB FD",
1067 .device_id = PCAN_USBFD_PRODUCT_ID,
1068 .ctrl_count = PCAN_USBFD_CHANNEL_COUNT,
1069 .ctrlmode_supported = CAN_CTRLMODE_FD |
1070 CAN_CTRLMODE_3_SAMPLES | CAN_CTRLMODE_LISTENONLY |
1071 CAN_CTRLMODE_ONE_SHOT | CAN_CTRLMODE_CC_LEN8_DLC,
1072 .clock = {
1073 .freq = PCAN_UFD_CRYSTAL_HZ,
1074 },
1075 .bittiming_const = &pcan_usb_fd_const,
1076 .data_bittiming_const = &pcan_usb_fd_data_const,
1077
1078 /* size of device private data */
1079 .sizeof_dev_private = sizeof(struct pcan_usb_fd_device),
1080
1081 .ethtool_ops = &pcan_usb_fd_ethtool_ops,
1082
1083 /* timestamps usage */
1084 .ts_used_bits = 32,
1085 .us_per_ts_scale = 1, /* us = (ts * scale) >> shift */
1086 .us_per_ts_shift = 0,
1087
1088 /* give here messages in/out endpoints */
1089 .ep_msg_in = PCAN_USBPRO_EP_MSGIN,
1090 .ep_msg_out = {PCAN_USBPRO_EP_MSGOUT_0},
1091
1092 /* size of rx/tx usb buffers */
1093 .rx_buffer_size = PCAN_UFD_RX_BUFFER_SIZE,
1094 .tx_buffer_size = PCAN_UFD_TX_BUFFER_SIZE,
1095
1096 /* device callbacks */
1097 .intf_probe = pcan_usb_pro_probe, /* same as PCAN-USB Pro */
1098 .dev_init = pcan_usb_fd_init,
1099
1100 .dev_exit = pcan_usb_fd_exit,
1101 .dev_free = pcan_usb_fd_free,
1102 .dev_set_bus = pcan_usb_fd_set_bus,
1103 .dev_set_bittiming = pcan_usb_fd_set_bittiming_slow,
1104 .dev_set_data_bittiming = pcan_usb_fd_set_bittiming_fast,
1105 .dev_decode_buf = pcan_usb_fd_decode_buf,
1106 .dev_start = pcan_usb_fd_start,
1107 .dev_stop = pcan_usb_fd_stop,
1108 .dev_restart_async = pcan_usb_fd_restart_async,
1109 .dev_encode_msg = pcan_usb_fd_encode_msg,
1110
1111 .do_get_berr_counter = pcan_usb_fd_get_berr_counter,
1112 };
1113
1114 /* describes the PCAN-CHIP USB */
1115 static const struct can_bittiming_const pcan_usb_chip_const = {
1116 .name = "pcan_chip_usb",
1117 .tseg1_min = 1,
1118 .tseg1_max = (1 << PUCAN_TSLOW_TSGEG1_BITS),
1119 .tseg2_min = 1,
1120 .tseg2_max = (1 << PUCAN_TSLOW_TSGEG2_BITS),
1121 .sjw_max = (1 << PUCAN_TSLOW_SJW_BITS),
1122 .brp_min = 1,
1123 .brp_max = (1 << PUCAN_TSLOW_BRP_BITS),
1124 .brp_inc = 1,
1125 };
1126
1127 static const struct can_bittiming_const pcan_usb_chip_data_const = {
1128 .name = "pcan_chip_usb",
1129 .tseg1_min = 1,
1130 .tseg1_max = (1 << PUCAN_TFAST_TSGEG1_BITS),
1131 .tseg2_min = 1,
1132 .tseg2_max = (1 << PUCAN_TFAST_TSGEG2_BITS),
1133 .sjw_max = (1 << PUCAN_TFAST_SJW_BITS),
1134 .brp_min = 1,
1135 .brp_max = (1 << PUCAN_TFAST_BRP_BITS),
1136 .brp_inc = 1,
1137 };
1138
1139 const struct peak_usb_adapter pcan_usb_chip = {
1140 .name = "PCAN-Chip USB",
1141 .device_id = PCAN_USBCHIP_PRODUCT_ID,
1142 .ctrl_count = PCAN_USBFD_CHANNEL_COUNT,
1143 .ctrlmode_supported = CAN_CTRLMODE_FD |
1144 CAN_CTRLMODE_3_SAMPLES | CAN_CTRLMODE_LISTENONLY |
1145 CAN_CTRLMODE_ONE_SHOT | CAN_CTRLMODE_CC_LEN8_DLC,
1146 .clock = {
1147 .freq = PCAN_UFD_CRYSTAL_HZ,
1148 },
1149 .bittiming_const = &pcan_usb_chip_const,
1150 .data_bittiming_const = &pcan_usb_chip_data_const,
1151
1152 /* size of device private data */
1153 .sizeof_dev_private = sizeof(struct pcan_usb_fd_device),
1154
1155 .ethtool_ops = &pcan_usb_fd_ethtool_ops,
1156
1157 /* timestamps usage */
1158 .ts_used_bits = 32,
1159 .us_per_ts_scale = 1, /* us = (ts * scale) >> shift */
1160 .us_per_ts_shift = 0,
1161
1162 /* give here messages in/out endpoints */
1163 .ep_msg_in = PCAN_USBPRO_EP_MSGIN,
1164 .ep_msg_out = {PCAN_USBPRO_EP_MSGOUT_0},
1165
1166 /* size of rx/tx usb buffers */
1167 .rx_buffer_size = PCAN_UFD_RX_BUFFER_SIZE,
1168 .tx_buffer_size = PCAN_UFD_TX_BUFFER_SIZE,
1169
1170 /* device callbacks */
1171 .intf_probe = pcan_usb_pro_probe, /* same as PCAN-USB Pro */
1172 .dev_init = pcan_usb_fd_init,
1173
1174 .dev_exit = pcan_usb_fd_exit,
1175 .dev_free = pcan_usb_fd_free,
1176 .dev_set_bus = pcan_usb_fd_set_bus,
1177 .dev_set_bittiming = pcan_usb_fd_set_bittiming_slow,
1178 .dev_set_data_bittiming = pcan_usb_fd_set_bittiming_fast,
1179 .dev_decode_buf = pcan_usb_fd_decode_buf,
1180 .dev_start = pcan_usb_fd_start,
1181 .dev_stop = pcan_usb_fd_stop,
1182 .dev_restart_async = pcan_usb_fd_restart_async,
1183 .dev_encode_msg = pcan_usb_fd_encode_msg,
1184
1185 .do_get_berr_counter = pcan_usb_fd_get_berr_counter,
1186 };
1187
1188 /* describes the PCAN-USB Pro FD adapter */
1189 static const struct can_bittiming_const pcan_usb_pro_fd_const = {
1190 .name = "pcan_usb_pro_fd",
1191 .tseg1_min = 1,
1192 .tseg1_max = (1 << PUCAN_TSLOW_TSGEG1_BITS),
1193 .tseg2_min = 1,
1194 .tseg2_max = (1 << PUCAN_TSLOW_TSGEG2_BITS),
1195 .sjw_max = (1 << PUCAN_TSLOW_SJW_BITS),
1196 .brp_min = 1,
1197 .brp_max = (1 << PUCAN_TSLOW_BRP_BITS),
1198 .brp_inc = 1,
1199 };
1200
1201 static const struct can_bittiming_const pcan_usb_pro_fd_data_const = {
1202 .name = "pcan_usb_pro_fd",
1203 .tseg1_min = 1,
1204 .tseg1_max = (1 << PUCAN_TFAST_TSGEG1_BITS),
1205 .tseg2_min = 1,
1206 .tseg2_max = (1 << PUCAN_TFAST_TSGEG2_BITS),
1207 .sjw_max = (1 << PUCAN_TFAST_SJW_BITS),
1208 .brp_min = 1,
1209 .brp_max = (1 << PUCAN_TFAST_BRP_BITS),
1210 .brp_inc = 1,
1211 };
1212
1213 const struct peak_usb_adapter pcan_usb_pro_fd = {
1214 .name = "PCAN-USB Pro FD",
1215 .device_id = PCAN_USBPROFD_PRODUCT_ID,
1216 .ctrl_count = PCAN_USBPROFD_CHANNEL_COUNT,
1217 .ctrlmode_supported = CAN_CTRLMODE_FD |
1218 CAN_CTRLMODE_3_SAMPLES | CAN_CTRLMODE_LISTENONLY |
1219 CAN_CTRLMODE_ONE_SHOT | CAN_CTRLMODE_CC_LEN8_DLC,
1220 .clock = {
1221 .freq = PCAN_UFD_CRYSTAL_HZ,
1222 },
1223 .bittiming_const = &pcan_usb_pro_fd_const,
1224 .data_bittiming_const = &pcan_usb_pro_fd_data_const,
1225
1226 /* size of device private data */
1227 .sizeof_dev_private = sizeof(struct pcan_usb_fd_device),
1228
1229 .ethtool_ops = &pcan_usb_fd_ethtool_ops,
1230
1231 /* timestamps usage */
1232 .ts_used_bits = 32,
1233 .us_per_ts_scale = 1, /* us = (ts * scale) >> shift */
1234 .us_per_ts_shift = 0,
1235
1236 /* give here messages in/out endpoints */
1237 .ep_msg_in = PCAN_USBPRO_EP_MSGIN,
1238 .ep_msg_out = {PCAN_USBPRO_EP_MSGOUT_0, PCAN_USBPRO_EP_MSGOUT_1},
1239
1240 /* size of rx/tx usb buffers */
1241 .rx_buffer_size = PCAN_UFD_RX_BUFFER_SIZE,
1242 .tx_buffer_size = PCAN_UFD_TX_BUFFER_SIZE,
1243
1244 /* device callbacks */
1245 .intf_probe = pcan_usb_pro_probe, /* same as PCAN-USB Pro */
1246 .dev_init = pcan_usb_fd_init,
1247
1248 .dev_exit = pcan_usb_fd_exit,
1249 .dev_free = pcan_usb_fd_free,
1250 .dev_set_bus = pcan_usb_fd_set_bus,
1251 .dev_set_bittiming = pcan_usb_fd_set_bittiming_slow,
1252 .dev_set_data_bittiming = pcan_usb_fd_set_bittiming_fast,
1253 .dev_decode_buf = pcan_usb_fd_decode_buf,
1254 .dev_start = pcan_usb_fd_start,
1255 .dev_stop = pcan_usb_fd_stop,
1256 .dev_restart_async = pcan_usb_fd_restart_async,
1257 .dev_encode_msg = pcan_usb_fd_encode_msg,
1258
1259 .do_get_berr_counter = pcan_usb_fd_get_berr_counter,
1260 };
1261
1262 /* describes the PCAN-USB X6 adapter */
1263 static const struct can_bittiming_const pcan_usb_x6_const = {
1264 .name = "pcan_usb_x6",
1265 .tseg1_min = 1,
1266 .tseg1_max = (1 << PUCAN_TSLOW_TSGEG1_BITS),
1267 .tseg2_min = 1,
1268 .tseg2_max = (1 << PUCAN_TSLOW_TSGEG2_BITS),
1269 .sjw_max = (1 << PUCAN_TSLOW_SJW_BITS),
1270 .brp_min = 1,
1271 .brp_max = (1 << PUCAN_TSLOW_BRP_BITS),
1272 .brp_inc = 1,
1273 };
1274
1275 static const struct can_bittiming_const pcan_usb_x6_data_const = {
1276 .name = "pcan_usb_x6",
1277 .tseg1_min = 1,
1278 .tseg1_max = (1 << PUCAN_TFAST_TSGEG1_BITS),
1279 .tseg2_min = 1,
1280 .tseg2_max = (1 << PUCAN_TFAST_TSGEG2_BITS),
1281 .sjw_max = (1 << PUCAN_TFAST_SJW_BITS),
1282 .brp_min = 1,
1283 .brp_max = (1 << PUCAN_TFAST_BRP_BITS),
1284 .brp_inc = 1,
1285 };
1286
1287 const struct peak_usb_adapter pcan_usb_x6 = {
1288 .name = "PCAN-USB X6",
1289 .device_id = PCAN_USBX6_PRODUCT_ID,
1290 .ctrl_count = PCAN_USBPROFD_CHANNEL_COUNT,
1291 .ctrlmode_supported = CAN_CTRLMODE_FD |
1292 CAN_CTRLMODE_3_SAMPLES | CAN_CTRLMODE_LISTENONLY |
1293 CAN_CTRLMODE_ONE_SHOT | CAN_CTRLMODE_CC_LEN8_DLC,
1294 .clock = {
1295 .freq = PCAN_UFD_CRYSTAL_HZ,
1296 },
1297 .bittiming_const = &pcan_usb_x6_const,
1298 .data_bittiming_const = &pcan_usb_x6_data_const,
1299
1300 /* size of device private data */
1301 .sizeof_dev_private = sizeof(struct pcan_usb_fd_device),
1302
1303 .ethtool_ops = &pcan_usb_fd_ethtool_ops,
1304
1305 /* timestamps usage */
1306 .ts_used_bits = 32,
1307 .us_per_ts_scale = 1, /* us = (ts * scale) >> shift */
1308 .us_per_ts_shift = 0,
1309
1310 /* give here messages in/out endpoints */
1311 .ep_msg_in = PCAN_USBPRO_EP_MSGIN,
1312 .ep_msg_out = {PCAN_USBPRO_EP_MSGOUT_0, PCAN_USBPRO_EP_MSGOUT_1},
1313
1314 /* size of rx/tx usb buffers */
1315 .rx_buffer_size = PCAN_UFD_RX_BUFFER_SIZE,
1316 .tx_buffer_size = PCAN_UFD_TX_BUFFER_SIZE,
1317
1318 /* device callbacks */
1319 .intf_probe = pcan_usb_pro_probe, /* same as PCAN-USB Pro */
1320 .dev_init = pcan_usb_fd_init,
1321
1322 .dev_exit = pcan_usb_fd_exit,
1323 .dev_free = pcan_usb_fd_free,
1324 .dev_set_bus = pcan_usb_fd_set_bus,
1325 .dev_set_bittiming = pcan_usb_fd_set_bittiming_slow,
1326 .dev_set_data_bittiming = pcan_usb_fd_set_bittiming_fast,
1327 .dev_decode_buf = pcan_usb_fd_decode_buf,
1328 .dev_start = pcan_usb_fd_start,
1329 .dev_stop = pcan_usb_fd_stop,
1330 .dev_restart_async = pcan_usb_fd_restart_async,
1331 .dev_encode_msg = pcan_usb_fd_encode_msg,
1332
1333 .do_get_berr_counter = pcan_usb_fd_get_berr_counter,
1334 };
1335