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
11 #include <linux/can.h>
12 #include <linux/can/dev.h>
13 #include <linux/can/error.h>
14 #include <linux/can/dev/peak_canfd.h>
15
16 #include "pcan_usb_core.h"
17 #include "pcan_usb_pro.h"
18
19 MODULE_SUPPORTED_DEVICE("PEAK-System PCAN-USB FD adapter");
20 MODULE_SUPPORTED_DEVICE("PEAK-System PCAN-USB Pro FD adapter");
21
22 #define PCAN_USBPROFD_CHANNEL_COUNT 2
23 #define PCAN_USBFD_CHANNEL_COUNT 1
24
25 /* PCAN-USB Pro FD adapter internal clock (Hz) */
26 #define PCAN_UFD_CRYSTAL_HZ 80000000
27
28 #define PCAN_UFD_CMD_BUFFER_SIZE 512
29 #define PCAN_UFD_LOSPD_PKT_SIZE 64
30
31 /* PCAN-USB Pro FD command timeout (ms.) */
32 #define PCAN_UFD_CMD_TIMEOUT_MS 1000
33
34 /* PCAN-USB Pro FD rx/tx buffers size */
35 #define PCAN_UFD_RX_BUFFER_SIZE 2048
36 #define PCAN_UFD_TX_BUFFER_SIZE 512
37
38 /* read some versions info from the hw device */
39 struct __packed pcan_ufd_fw_info {
40 __le16 size_of; /* sizeof this */
41 __le16 type; /* type of this structure */
42 u8 hw_type; /* Type of hardware (HW_TYPE_xxx) */
43 u8 bl_version[3]; /* Bootloader version */
44 u8 hw_version; /* Hardware version (PCB) */
45 u8 fw_version[3]; /* Firmware version */
46 __le32 dev_id[2]; /* "device id" per CAN */
47 __le32 ser_no; /* S/N */
48 __le32 flags; /* special functions */
49 };
50
51 /* handle device specific info used by the netdevices */
52 struct pcan_usb_fd_if {
53 struct peak_usb_device *dev[PCAN_USB_MAX_CHANNEL];
54 struct pcan_ufd_fw_info fw_info;
55 struct peak_time_ref time_ref;
56 int cm_ignore_count;
57 int dev_opened_count;
58 };
59
60 /* device information */
61 struct pcan_usb_fd_device {
62 struct peak_usb_device dev;
63 struct can_berr_counter bec;
64 struct pcan_usb_fd_if *usb_if;
65 u8 *cmd_buffer_addr;
66 };
67
68 /* Extended USB commands (non uCAN commands) */
69
70 /* Clock Modes command */
71 #define PCAN_UFD_CMD_CLK_SET 0x80
72
73 #define PCAN_UFD_CLK_80MHZ 0x0
74 #define PCAN_UFD_CLK_60MHZ 0x1
75 #define PCAN_UFD_CLK_40MHZ 0x2
76 #define PCAN_UFD_CLK_30MHZ 0x3
77 #define PCAN_UFD_CLK_24MHZ 0x4
78 #define PCAN_UFD_CLK_20MHZ 0x5
79 #define PCAN_UFD_CLK_DEF PCAN_UFD_CLK_80MHZ
80
81 struct __packed pcan_ufd_clock {
82 __le16 opcode_channel;
83
84 u8 mode;
85 u8 unused[5];
86 };
87
88 /* LED control command */
89 #define PCAN_UFD_CMD_LED_SET 0x86
90
91 #define PCAN_UFD_LED_DEV 0x00
92 #define PCAN_UFD_LED_FAST 0x01
93 #define PCAN_UFD_LED_SLOW 0x02
94 #define PCAN_UFD_LED_ON 0x03
95 #define PCAN_UFD_LED_OFF 0x04
96 #define PCAN_UFD_LED_DEF PCAN_UFD_LED_DEV
97
98 struct __packed pcan_ufd_led {
99 __le16 opcode_channel;
100
101 u8 mode;
102 u8 unused[5];
103 };
104
105 /* Extended usage of uCAN commands CMD_xxx_xx_OPTION for PCAN-USB Pro FD */
106 #define PCAN_UFD_FLTEXT_CALIBRATION 0x8000
107
108 struct __packed pcan_ufd_options {
109 __le16 opcode_channel;
110
111 __le16 ucan_mask;
112 u16 unused;
113 __le16 usb_mask;
114 };
115
116 /* Extended usage of uCAN messages for PCAN-USB Pro FD */
117 #define PCAN_UFD_MSG_CALIBRATION 0x100
118
119 struct __packed pcan_ufd_ts_msg {
120 __le16 size;
121 __le16 type;
122 __le32 ts_low;
123 __le32 ts_high;
124 __le16 usb_frame_index;
125 u16 unused;
126 };
127
128 #define PCAN_UFD_MSG_OVERRUN 0x101
129
130 #define PCAN_UFD_OVMSG_CHANNEL(o) ((o)->channel & 0xf)
131
132 struct __packed pcan_ufd_ovr_msg {
133 __le16 size;
134 __le16 type;
135 __le32 ts_low;
136 __le32 ts_high;
137 u8 channel;
138 u8 unused[3];
139 };
140
pufd_omsg_get_channel(struct pcan_ufd_ovr_msg * om)141 static inline int pufd_omsg_get_channel(struct pcan_ufd_ovr_msg *om)
142 {
143 return om->channel & 0xf;
144 }
145
146 /* Clock mode frequency values */
147 static const u32 pcan_usb_fd_clk_freq[6] = {
148 [PCAN_UFD_CLK_80MHZ] = 80000000,
149 [PCAN_UFD_CLK_60MHZ] = 60000000,
150 [PCAN_UFD_CLK_40MHZ] = 40000000,
151 [PCAN_UFD_CLK_30MHZ] = 30000000,
152 [PCAN_UFD_CLK_24MHZ] = 24000000,
153 [PCAN_UFD_CLK_20MHZ] = 20000000
154 };
155
156 /* return a device USB interface */
157 static inline
pcan_usb_fd_dev_if(struct peak_usb_device * dev)158 struct pcan_usb_fd_if *pcan_usb_fd_dev_if(struct peak_usb_device *dev)
159 {
160 struct pcan_usb_fd_device *pdev =
161 container_of(dev, struct pcan_usb_fd_device, dev);
162 return pdev->usb_if;
163 }
164
165 /* return a device USB commands buffer */
pcan_usb_fd_cmd_buffer(struct peak_usb_device * dev)166 static inline void *pcan_usb_fd_cmd_buffer(struct peak_usb_device *dev)
167 {
168 struct pcan_usb_fd_device *pdev =
169 container_of(dev, struct pcan_usb_fd_device, dev);
170 return pdev->cmd_buffer_addr;
171 }
172
173 /* send PCAN-USB Pro FD commands synchronously */
pcan_usb_fd_send_cmd(struct peak_usb_device * dev,void * cmd_tail)174 static int pcan_usb_fd_send_cmd(struct peak_usb_device *dev, void *cmd_tail)
175 {
176 void *cmd_head = pcan_usb_fd_cmd_buffer(dev);
177 int err = 0;
178 u8 *packet_ptr;
179 int packet_len;
180 ptrdiff_t cmd_len;
181
182 /* usb device unregistered? */
183 if (!(dev->state & PCAN_USB_STATE_CONNECTED))
184 return 0;
185
186 /* if a packet is not filled completely by commands, the command list
187 * is terminated with an "end of collection" record.
188 */
189 cmd_len = cmd_tail - cmd_head;
190 if (cmd_len <= (PCAN_UFD_CMD_BUFFER_SIZE - sizeof(u64))) {
191 memset(cmd_tail, 0xff, sizeof(u64));
192 cmd_len += sizeof(u64);
193 }
194
195 packet_ptr = cmd_head;
196 packet_len = cmd_len;
197
198 /* firmware is not able to re-assemble 512 bytes buffer in full-speed */
199 if (unlikely(dev->udev->speed != USB_SPEED_HIGH))
200 packet_len = min(packet_len, PCAN_UFD_LOSPD_PKT_SIZE);
201
202 do {
203 err = usb_bulk_msg(dev->udev,
204 usb_sndbulkpipe(dev->udev,
205 PCAN_USBPRO_EP_CMDOUT),
206 packet_ptr, packet_len,
207 NULL, PCAN_UFD_CMD_TIMEOUT_MS);
208 if (err) {
209 netdev_err(dev->netdev,
210 "sending command failure: %d\n", err);
211 break;
212 }
213
214 packet_ptr += packet_len;
215 cmd_len -= packet_len;
216
217 if (cmd_len < PCAN_UFD_LOSPD_PKT_SIZE)
218 packet_len = cmd_len;
219
220 } while (packet_len > 0);
221
222 return err;
223 }
224
225 /* 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)226 static int pcan_usb_fd_build_restart_cmd(struct peak_usb_device *dev, u8 *buf)
227 {
228 struct pucan_wr_err_cnt *prc;
229 struct pucan_command *cmd;
230 u8 *pc = buf;
231
232 /* 1st, reset error counters: */
233 prc = (struct pucan_wr_err_cnt *)pc;
234 prc->opcode_channel = pucan_cmd_opcode_channel(dev->ctrl_idx,
235 PUCAN_CMD_WR_ERR_CNT);
236
237 /* select both counters */
238 prc->sel_mask = cpu_to_le16(PUCAN_WRERRCNT_TE|PUCAN_WRERRCNT_RE);
239
240 /* and reset their values */
241 prc->tx_counter = 0;
242 prc->rx_counter = 0;
243
244 /* moves the pointer forward */
245 pc += sizeof(struct pucan_wr_err_cnt);
246
247 /* add command to switch from ISO to non-ISO mode, if fw allows it */
248 if (dev->can.ctrlmode_supported & CAN_CTRLMODE_FD_NON_ISO) {
249 struct pucan_options *puo = (struct pucan_options *)pc;
250
251 puo->opcode_channel =
252 (dev->can.ctrlmode & CAN_CTRLMODE_FD_NON_ISO) ?
253 pucan_cmd_opcode_channel(dev->ctrl_idx,
254 PUCAN_CMD_CLR_DIS_OPTION) :
255 pucan_cmd_opcode_channel(dev->ctrl_idx,
256 PUCAN_CMD_SET_EN_OPTION);
257
258 puo->options = cpu_to_le16(PUCAN_OPTION_CANDFDISO);
259
260 /* to be sure that no other extended bits will be taken into
261 * account
262 */
263 puo->unused = 0;
264
265 /* moves the pointer forward */
266 pc += sizeof(struct pucan_options);
267 }
268
269 /* next, go back to operational mode */
270 cmd = (struct pucan_command *)pc;
271 cmd->opcode_channel = pucan_cmd_opcode_channel(dev->ctrl_idx,
272 (dev->can.ctrlmode & CAN_CTRLMODE_LISTENONLY) ?
273 PUCAN_CMD_LISTEN_ONLY_MODE :
274 PUCAN_CMD_NORMAL_MODE);
275 pc += sizeof(struct pucan_command);
276
277 return pc - buf;
278 }
279
280 /* set CAN bus on/off */
pcan_usb_fd_set_bus(struct peak_usb_device * dev,u8 onoff)281 static int pcan_usb_fd_set_bus(struct peak_usb_device *dev, u8 onoff)
282 {
283 u8 *pc = pcan_usb_fd_cmd_buffer(dev);
284 int l;
285
286 if (onoff) {
287 /* build the cmds list to enter operational mode */
288 l = pcan_usb_fd_build_restart_cmd(dev, pc);
289 } else {
290 struct pucan_command *cmd = (struct pucan_command *)pc;
291
292 /* build cmd to go back to reset mode */
293 cmd->opcode_channel = pucan_cmd_opcode_channel(dev->ctrl_idx,
294 PUCAN_CMD_RESET_MODE);
295 l = sizeof(struct pucan_command);
296 }
297
298 /* send the command */
299 return pcan_usb_fd_send_cmd(dev, pc + l);
300 }
301
302 /* set filtering masks:
303 *
304 * idx in range [0..63] selects a row #idx, all rows otherwise
305 * mask in range [0..0xffffffff] defines up to 32 CANIDs in the row(s)
306 *
307 * Each bit of this 64 x 32 bits array defines a CANID value:
308 *
309 * bit[i,j] = 1 implies that CANID=(i x 32)+j will be received, while
310 * bit[i,j] = 0 implies that CANID=(i x 32)+j will be discarded.
311 */
pcan_usb_fd_set_filter_std(struct peak_usb_device * dev,int idx,u32 mask)312 static int pcan_usb_fd_set_filter_std(struct peak_usb_device *dev, int idx,
313 u32 mask)
314 {
315 struct pucan_filter_std *cmd = pcan_usb_fd_cmd_buffer(dev);
316 int i, n;
317
318 /* select all rows when idx is out of range [0..63] */
319 if ((idx < 0) || (idx >= (1 << PUCAN_FLTSTD_ROW_IDX_BITS))) {
320 n = 1 << PUCAN_FLTSTD_ROW_IDX_BITS;
321 idx = 0;
322
323 /* select the row (and only the row) otherwise */
324 } else {
325 n = idx + 1;
326 }
327
328 for (i = idx; i < n; i++, cmd++) {
329 cmd->opcode_channel = pucan_cmd_opcode_channel(dev->ctrl_idx,
330 PUCAN_CMD_FILTER_STD);
331 cmd->idx = cpu_to_le16(i);
332 cmd->mask = cpu_to_le32(mask);
333 }
334
335 /* send the command */
336 return pcan_usb_fd_send_cmd(dev, cmd);
337 }
338
339 /* set/unset options
340 *
341 * onoff set(1)/unset(0) options
342 * mask each bit defines a kind of options to set/unset
343 */
pcan_usb_fd_set_options(struct peak_usb_device * dev,bool onoff,u16 ucan_mask,u16 usb_mask)344 static int pcan_usb_fd_set_options(struct peak_usb_device *dev,
345 bool onoff, u16 ucan_mask, u16 usb_mask)
346 {
347 struct pcan_ufd_options *cmd = pcan_usb_fd_cmd_buffer(dev);
348
349 cmd->opcode_channel = pucan_cmd_opcode_channel(dev->ctrl_idx,
350 (onoff) ? PUCAN_CMD_SET_EN_OPTION :
351 PUCAN_CMD_CLR_DIS_OPTION);
352
353 cmd->ucan_mask = cpu_to_le16(ucan_mask);
354 cmd->usb_mask = cpu_to_le16(usb_mask);
355
356 /* send the command */
357 return pcan_usb_fd_send_cmd(dev, ++cmd);
358 }
359
360 /* setup LED control */
pcan_usb_fd_set_can_led(struct peak_usb_device * dev,u8 led_mode)361 static int pcan_usb_fd_set_can_led(struct peak_usb_device *dev, u8 led_mode)
362 {
363 struct pcan_ufd_led *cmd = pcan_usb_fd_cmd_buffer(dev);
364
365 cmd->opcode_channel = pucan_cmd_opcode_channel(dev->ctrl_idx,
366 PCAN_UFD_CMD_LED_SET);
367 cmd->mode = led_mode;
368
369 /* send the command */
370 return pcan_usb_fd_send_cmd(dev, ++cmd);
371 }
372
373 /* set CAN clock domain */
pcan_usb_fd_set_clock_domain(struct peak_usb_device * dev,u8 clk_mode)374 static int pcan_usb_fd_set_clock_domain(struct peak_usb_device *dev,
375 u8 clk_mode)
376 {
377 struct pcan_ufd_clock *cmd = pcan_usb_fd_cmd_buffer(dev);
378
379 cmd->opcode_channel = pucan_cmd_opcode_channel(dev->ctrl_idx,
380 PCAN_UFD_CMD_CLK_SET);
381 cmd->mode = clk_mode;
382
383 /* send the command */
384 return pcan_usb_fd_send_cmd(dev, ++cmd);
385 }
386
387 /* set bittiming for CAN and CAN-FD header */
pcan_usb_fd_set_bittiming_slow(struct peak_usb_device * dev,struct can_bittiming * bt)388 static int pcan_usb_fd_set_bittiming_slow(struct peak_usb_device *dev,
389 struct can_bittiming *bt)
390 {
391 struct pucan_timing_slow *cmd = pcan_usb_fd_cmd_buffer(dev);
392
393 cmd->opcode_channel = pucan_cmd_opcode_channel(dev->ctrl_idx,
394 PUCAN_CMD_TIMING_SLOW);
395 cmd->sjw_t = PUCAN_TSLOW_SJW_T(bt->sjw - 1,
396 dev->can.ctrlmode & CAN_CTRLMODE_3_SAMPLES);
397
398 cmd->tseg2 = PUCAN_TSLOW_TSEG2(bt->phase_seg2 - 1);
399 cmd->tseg1 = PUCAN_TSLOW_TSEG1(bt->prop_seg + bt->phase_seg1 - 1);
400 cmd->brp = cpu_to_le16(PUCAN_TSLOW_BRP(bt->brp - 1));
401
402 cmd->ewl = 96; /* default */
403
404 /* send the command */
405 return pcan_usb_fd_send_cmd(dev, ++cmd);
406 }
407
408 /* set CAN-FD bittiming for data */
pcan_usb_fd_set_bittiming_fast(struct peak_usb_device * dev,struct can_bittiming * bt)409 static int pcan_usb_fd_set_bittiming_fast(struct peak_usb_device *dev,
410 struct can_bittiming *bt)
411 {
412 struct pucan_timing_fast *cmd = pcan_usb_fd_cmd_buffer(dev);
413
414 cmd->opcode_channel = pucan_cmd_opcode_channel(dev->ctrl_idx,
415 PUCAN_CMD_TIMING_FAST);
416 cmd->sjw = PUCAN_TFAST_SJW(bt->sjw - 1);
417 cmd->tseg2 = PUCAN_TFAST_TSEG2(bt->phase_seg2 - 1);
418 cmd->tseg1 = PUCAN_TFAST_TSEG1(bt->prop_seg + bt->phase_seg1 - 1);
419 cmd->brp = cpu_to_le16(PUCAN_TFAST_BRP(bt->brp - 1));
420
421 /* send the command */
422 return pcan_usb_fd_send_cmd(dev, ++cmd);
423 }
424
425 /* handle restart but in asynchronously way
426 * (uses PCAN-USB Pro code to complete asynchronous request)
427 */
pcan_usb_fd_restart_async(struct peak_usb_device * dev,struct urb * urb,u8 * buf)428 static int pcan_usb_fd_restart_async(struct peak_usb_device *dev,
429 struct urb *urb, u8 *buf)
430 {
431 u8 *pc = buf;
432
433 /* build the entire cmds list in the provided buffer, to go back into
434 * operational mode.
435 */
436 pc += pcan_usb_fd_build_restart_cmd(dev, pc);
437
438 /* add EOC */
439 memset(pc, 0xff, sizeof(struct pucan_command));
440 pc += sizeof(struct pucan_command);
441
442 /* complete the URB */
443 usb_fill_bulk_urb(urb, dev->udev,
444 usb_sndbulkpipe(dev->udev, PCAN_USBPRO_EP_CMDOUT),
445 buf, pc - buf,
446 pcan_usb_pro_restart_complete, dev);
447
448 /* and submit it. */
449 return usb_submit_urb(urb, GFP_ATOMIC);
450 }
451
pcan_usb_fd_drv_loaded(struct peak_usb_device * dev,bool loaded)452 static int pcan_usb_fd_drv_loaded(struct peak_usb_device *dev, bool loaded)
453 {
454 struct pcan_usb_fd_device *pdev =
455 container_of(dev, struct pcan_usb_fd_device, dev);
456
457 pdev->cmd_buffer_addr[0] = 0;
458 pdev->cmd_buffer_addr[1] = !!loaded;
459
460 return pcan_usb_pro_send_req(dev,
461 PCAN_USBPRO_REQ_FCT,
462 PCAN_USBPRO_FCT_DRVLD,
463 pdev->cmd_buffer_addr,
464 PCAN_USBPRO_FCT_DRVLD_REQ_LEN);
465 }
466
pcan_usb_fd_decode_canmsg(struct pcan_usb_fd_if * usb_if,struct pucan_msg * rx_msg)467 static int pcan_usb_fd_decode_canmsg(struct pcan_usb_fd_if *usb_if,
468 struct pucan_msg *rx_msg)
469 {
470 struct pucan_rx_msg *rm = (struct pucan_rx_msg *)rx_msg;
471 struct peak_usb_device *dev;
472 struct net_device *netdev;
473 struct canfd_frame *cfd;
474 struct sk_buff *skb;
475 const u16 rx_msg_flags = le16_to_cpu(rm->flags);
476
477 if (pucan_msg_get_channel(rm) >= ARRAY_SIZE(usb_if->dev))
478 return -ENOMEM;
479
480 dev = usb_if->dev[pucan_msg_get_channel(rm)];
481 netdev = dev->netdev;
482
483 if (rx_msg_flags & PUCAN_MSG_EXT_DATA_LEN) {
484 /* CANFD frame case */
485 skb = alloc_canfd_skb(netdev, &cfd);
486 if (!skb)
487 return -ENOMEM;
488
489 if (rx_msg_flags & PUCAN_MSG_BITRATE_SWITCH)
490 cfd->flags |= CANFD_BRS;
491
492 if (rx_msg_flags & PUCAN_MSG_ERROR_STATE_IND)
493 cfd->flags |= CANFD_ESI;
494
495 cfd->len = can_dlc2len(get_canfd_dlc(pucan_msg_get_dlc(rm)));
496 } else {
497 /* CAN 2.0 frame case */
498 skb = alloc_can_skb(netdev, (struct can_frame **)&cfd);
499 if (!skb)
500 return -ENOMEM;
501
502 cfd->len = get_can_dlc(pucan_msg_get_dlc(rm));
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 peak_usb_netif_rx(skb, &usb_if->time_ref, le32_to_cpu(rm->ts_low));
516
517 netdev->stats.rx_packets++;
518 netdev->stats.rx_bytes += cfd->len;
519
520 return 0;
521 }
522
523 /* handle uCAN status message */
pcan_usb_fd_decode_status(struct pcan_usb_fd_if * usb_if,struct pucan_msg * rx_msg)524 static int pcan_usb_fd_decode_status(struct pcan_usb_fd_if *usb_if,
525 struct pucan_msg *rx_msg)
526 {
527 struct pucan_status_msg *sm = (struct pucan_status_msg *)rx_msg;
528 struct pcan_usb_fd_device *pdev;
529 enum can_state new_state = CAN_STATE_ERROR_ACTIVE;
530 enum can_state rx_state, tx_state;
531 struct peak_usb_device *dev;
532 struct net_device *netdev;
533 struct can_frame *cf;
534 struct sk_buff *skb;
535
536 if (pucan_stmsg_get_channel(sm) >= ARRAY_SIZE(usb_if->dev))
537 return -ENOMEM;
538
539 dev = usb_if->dev[pucan_stmsg_get_channel(sm)];
540 pdev = container_of(dev, struct pcan_usb_fd_device, dev);
541 netdev = dev->netdev;
542
543 /* nothing should be sent while in BUS_OFF state */
544 if (dev->can.state == CAN_STATE_BUS_OFF)
545 return 0;
546
547 if (sm->channel_p_w_b & PUCAN_BUS_BUSOFF) {
548 new_state = CAN_STATE_BUS_OFF;
549 } else if (sm->channel_p_w_b & PUCAN_BUS_PASSIVE) {
550 new_state = CAN_STATE_ERROR_PASSIVE;
551 } else if (sm->channel_p_w_b & PUCAN_BUS_WARNING) {
552 new_state = CAN_STATE_ERROR_WARNING;
553 } else {
554 /* no error bit (so, no error skb, back to active state) */
555 dev->can.state = CAN_STATE_ERROR_ACTIVE;
556 pdev->bec.txerr = 0;
557 pdev->bec.rxerr = 0;
558 return 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 if (skb)
572 can_change_state(netdev, cf, tx_state, rx_state);
573
574 /* things must be done even in case of OOM */
575 if (new_state == CAN_STATE_BUS_OFF)
576 can_bus_off(netdev);
577
578 if (!skb)
579 return -ENOMEM;
580
581 peak_usb_netif_rx(skb, &usb_if->time_ref, le32_to_cpu(sm->ts_low));
582
583 netdev->stats.rx_packets++;
584 netdev->stats.rx_bytes += cf->can_dlc;
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(skb, &usb_if->time_ref, le32_to_cpu(ov->ts_low));
635
636 netdev->stats.rx_over_errors++;
637 netdev->stats.rx_errors++;
638
639 return 0;
640 }
641
642 /* handle USB calibration message */
pcan_usb_fd_decode_ts(struct pcan_usb_fd_if * usb_if,struct pucan_msg * rx_msg)643 static void pcan_usb_fd_decode_ts(struct pcan_usb_fd_if *usb_if,
644 struct pucan_msg *rx_msg)
645 {
646 struct pcan_ufd_ts_msg *ts = (struct pcan_ufd_ts_msg *)rx_msg;
647
648 /* should wait until clock is stabilized */
649 if (usb_if->cm_ignore_count > 0)
650 usb_if->cm_ignore_count--;
651 else
652 peak_usb_set_ts_now(&usb_if->time_ref, le32_to_cpu(ts->ts_low));
653 }
654
655 /* callback for bulk IN urb */
pcan_usb_fd_decode_buf(struct peak_usb_device * dev,struct urb * urb)656 static int pcan_usb_fd_decode_buf(struct peak_usb_device *dev, struct urb *urb)
657 {
658 struct pcan_usb_fd_if *usb_if = pcan_usb_fd_dev_if(dev);
659 struct net_device *netdev = dev->netdev;
660 struct pucan_msg *rx_msg;
661 u8 *msg_ptr, *msg_end;
662 int err = 0;
663
664 /* loop reading all the records from the incoming message */
665 msg_ptr = urb->transfer_buffer;
666 msg_end = urb->transfer_buffer + urb->actual_length;
667 for (; msg_ptr < msg_end;) {
668 u16 rx_msg_type, rx_msg_size;
669
670 rx_msg = (struct pucan_msg *)msg_ptr;
671 if (!rx_msg->size) {
672 /* null packet found: end of list */
673 break;
674 }
675
676 rx_msg_size = le16_to_cpu(rx_msg->size);
677 rx_msg_type = le16_to_cpu(rx_msg->type);
678
679 /* check if the record goes out of current packet */
680 if (msg_ptr + rx_msg_size > msg_end) {
681 netdev_err(netdev,
682 "got frag rec: should inc usb rx buf sze\n");
683 err = -EBADMSG;
684 break;
685 }
686
687 switch (rx_msg_type) {
688 case PUCAN_MSG_CAN_RX:
689 err = pcan_usb_fd_decode_canmsg(usb_if, rx_msg);
690 if (err < 0)
691 goto fail;
692 break;
693
694 case PCAN_UFD_MSG_CALIBRATION:
695 pcan_usb_fd_decode_ts(usb_if, rx_msg);
696 break;
697
698 case PUCAN_MSG_ERROR:
699 err = pcan_usb_fd_decode_error(usb_if, rx_msg);
700 if (err < 0)
701 goto fail;
702 break;
703
704 case PUCAN_MSG_STATUS:
705 err = pcan_usb_fd_decode_status(usb_if, rx_msg);
706 if (err < 0)
707 goto fail;
708 break;
709
710 case PCAN_UFD_MSG_OVERRUN:
711 err = pcan_usb_fd_decode_overrun(usb_if, rx_msg);
712 if (err < 0)
713 goto fail;
714 break;
715
716 default:
717 netdev_err(netdev,
718 "unhandled msg type 0x%02x (%d): ignored\n",
719 rx_msg_type, rx_msg_type);
720 break;
721 }
722
723 msg_ptr += rx_msg_size;
724 }
725
726 fail:
727 if (err)
728 pcan_dump_mem("received msg",
729 urb->transfer_buffer, urb->actual_length);
730 return err;
731 }
732
733 /* CAN/CANFD frames encoding callback */
pcan_usb_fd_encode_msg(struct peak_usb_device * dev,struct sk_buff * skb,u8 * obuf,size_t * size)734 static int pcan_usb_fd_encode_msg(struct peak_usb_device *dev,
735 struct sk_buff *skb, u8 *obuf, size_t *size)
736 {
737 struct pucan_tx_msg *tx_msg = (struct pucan_tx_msg *)obuf;
738 struct canfd_frame *cfd = (struct canfd_frame *)skb->data;
739 u16 tx_msg_size, tx_msg_flags;
740 u8 can_dlc;
741
742 if (cfd->len > CANFD_MAX_DLEN)
743 return -EINVAL;
744
745 tx_msg_size = ALIGN(sizeof(struct pucan_tx_msg) + cfd->len, 4);
746 tx_msg->size = cpu_to_le16(tx_msg_size);
747 tx_msg->type = cpu_to_le16(PUCAN_MSG_CAN_TX);
748
749 tx_msg_flags = 0;
750 if (cfd->can_id & CAN_EFF_FLAG) {
751 tx_msg_flags |= PUCAN_MSG_EXT_ID;
752 tx_msg->can_id = cpu_to_le32(cfd->can_id & CAN_EFF_MASK);
753 } else {
754 tx_msg->can_id = cpu_to_le32(cfd->can_id & CAN_SFF_MASK);
755 }
756
757 if (can_is_canfd_skb(skb)) {
758 /* considering a CANFD frame */
759 can_dlc = can_len2dlc(cfd->len);
760
761 tx_msg_flags |= PUCAN_MSG_EXT_DATA_LEN;
762
763 if (cfd->flags & CANFD_BRS)
764 tx_msg_flags |= PUCAN_MSG_BITRATE_SWITCH;
765
766 if (cfd->flags & CANFD_ESI)
767 tx_msg_flags |= PUCAN_MSG_ERROR_STATE_IND;
768 } else {
769 /* CAND 2.0 frames */
770 can_dlc = cfd->len;
771
772 if (cfd->can_id & CAN_RTR_FLAG)
773 tx_msg_flags |= PUCAN_MSG_RTR;
774 }
775
776 tx_msg->flags = cpu_to_le16(tx_msg_flags);
777 tx_msg->channel_dlc = PUCAN_MSG_CHANNEL_DLC(dev->ctrl_idx, can_dlc);
778 memcpy(tx_msg->d, cfd->data, cfd->len);
779
780 /* add null size message to tag the end (messages are 32-bits aligned)
781 */
782 tx_msg = (struct pucan_tx_msg *)(obuf + tx_msg_size);
783
784 tx_msg->size = 0;
785
786 /* set the whole size of the USB packet to send */
787 *size = tx_msg_size + sizeof(u32);
788
789 return 0;
790 }
791
792 /* start the interface (last chance before set bus on) */
pcan_usb_fd_start(struct peak_usb_device * dev)793 static int pcan_usb_fd_start(struct peak_usb_device *dev)
794 {
795 struct pcan_usb_fd_device *pdev =
796 container_of(dev, struct pcan_usb_fd_device, dev);
797 int err;
798
799 /* set filter mode: all acceptance */
800 err = pcan_usb_fd_set_filter_std(dev, -1, 0xffffffff);
801 if (err)
802 return err;
803
804 /* opening first device: */
805 if (pdev->usb_if->dev_opened_count == 0) {
806 /* reset time_ref */
807 peak_usb_init_time_ref(&pdev->usb_if->time_ref,
808 &pcan_usb_pro_fd);
809
810 /* enable USB calibration messages */
811 err = pcan_usb_fd_set_options(dev, 1,
812 PUCAN_OPTION_ERROR,
813 PCAN_UFD_FLTEXT_CALIBRATION);
814 }
815
816 pdev->usb_if->dev_opened_count++;
817
818 /* reset cached error counters */
819 pdev->bec.txerr = 0;
820 pdev->bec.rxerr = 0;
821
822 return err;
823 }
824
825 /* 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)826 static int pcan_usb_fd_get_berr_counter(const struct net_device *netdev,
827 struct can_berr_counter *bec)
828 {
829 struct peak_usb_device *dev = netdev_priv(netdev);
830 struct pcan_usb_fd_device *pdev =
831 container_of(dev, struct pcan_usb_fd_device, dev);
832
833 *bec = pdev->bec;
834
835 /* must return 0 */
836 return 0;
837 }
838
839 /* stop interface (last chance before set bus off) */
pcan_usb_fd_stop(struct peak_usb_device * dev)840 static int pcan_usb_fd_stop(struct peak_usb_device *dev)
841 {
842 struct pcan_usb_fd_device *pdev =
843 container_of(dev, struct pcan_usb_fd_device, dev);
844
845 /* turn off special msgs for that interface if no other dev opened */
846 if (pdev->usb_if->dev_opened_count == 1)
847 pcan_usb_fd_set_options(dev, 0,
848 PUCAN_OPTION_ERROR,
849 PCAN_UFD_FLTEXT_CALIBRATION);
850 pdev->usb_if->dev_opened_count--;
851
852 return 0;
853 }
854
855 /* called when probing, to initialize a device object */
pcan_usb_fd_init(struct peak_usb_device * dev)856 static int pcan_usb_fd_init(struct peak_usb_device *dev)
857 {
858 struct pcan_usb_fd_device *pdev =
859 container_of(dev, struct pcan_usb_fd_device, dev);
860 int i, err = -ENOMEM;
861
862 /* do this for 1st channel only */
863 if (!dev->prev_siblings) {
864 /* allocate netdevices common structure attached to first one */
865 pdev->usb_if = kzalloc(sizeof(*pdev->usb_if), GFP_KERNEL);
866 if (!pdev->usb_if)
867 goto err_out;
868
869 /* allocate command buffer once for all for the interface */
870 pdev->cmd_buffer_addr = kzalloc(PCAN_UFD_CMD_BUFFER_SIZE,
871 GFP_KERNEL);
872 if (!pdev->cmd_buffer_addr)
873 goto err_out_1;
874
875 /* number of ts msgs to ignore before taking one into account */
876 pdev->usb_if->cm_ignore_count = 5;
877
878 err = pcan_usb_pro_send_req(dev, PCAN_USBPRO_REQ_INFO,
879 PCAN_USBPRO_INFO_FW,
880 &pdev->usb_if->fw_info,
881 sizeof(pdev->usb_if->fw_info));
882 if (err) {
883 dev_err(dev->netdev->dev.parent,
884 "unable to read %s firmware info (err %d)\n",
885 dev->adapter->name, err);
886 goto err_out_2;
887 }
888
889 /* explicit use of dev_xxx() instead of netdev_xxx() here:
890 * information displayed are related to the device itself, not
891 * to the canx (channel) device.
892 */
893 dev_info(dev->netdev->dev.parent,
894 "PEAK-System %s v%u fw v%u.%u.%u (%u channels)\n",
895 dev->adapter->name, pdev->usb_if->fw_info.hw_version,
896 pdev->usb_if->fw_info.fw_version[0],
897 pdev->usb_if->fw_info.fw_version[1],
898 pdev->usb_if->fw_info.fw_version[2],
899 dev->adapter->ctrl_count);
900
901 /* check for ability to switch between ISO/non-ISO modes */
902 if (pdev->usb_if->fw_info.fw_version[0] >= 2) {
903 /* firmware >= 2.x supports ISO/non-ISO switching */
904 dev->can.ctrlmode_supported |= CAN_CTRLMODE_FD_NON_ISO;
905 } else {
906 /* firmware < 2.x only supports fixed(!) non-ISO */
907 dev->can.ctrlmode |= CAN_CTRLMODE_FD_NON_ISO;
908 }
909
910 /* tell the hardware the can driver is running */
911 err = pcan_usb_fd_drv_loaded(dev, 1);
912 if (err) {
913 dev_err(dev->netdev->dev.parent,
914 "unable to tell %s driver is loaded (err %d)\n",
915 dev->adapter->name, err);
916 goto err_out_2;
917 }
918 } else {
919 /* otherwise, simply copy previous sibling's values */
920 struct pcan_usb_fd_device *ppdev =
921 container_of(dev->prev_siblings,
922 struct pcan_usb_fd_device, dev);
923
924 pdev->usb_if = ppdev->usb_if;
925 pdev->cmd_buffer_addr = ppdev->cmd_buffer_addr;
926
927 /* do a copy of the ctrlmode[_supported] too */
928 dev->can.ctrlmode = ppdev->dev.can.ctrlmode;
929 dev->can.ctrlmode_supported = ppdev->dev.can.ctrlmode_supported;
930 }
931
932 pdev->usb_if->dev[dev->ctrl_idx] = dev;
933 dev->device_number =
934 le32_to_cpu(pdev->usb_if->fw_info.dev_id[dev->ctrl_idx]);
935
936 /* set clock domain */
937 for (i = 0; i < ARRAY_SIZE(pcan_usb_fd_clk_freq); i++)
938 if (dev->adapter->clock.freq == pcan_usb_fd_clk_freq[i])
939 break;
940
941 if (i >= ARRAY_SIZE(pcan_usb_fd_clk_freq)) {
942 dev_warn(dev->netdev->dev.parent,
943 "incompatible clock frequencies\n");
944 err = -EINVAL;
945 goto err_out_2;
946 }
947
948 pcan_usb_fd_set_clock_domain(dev, i);
949
950 /* set LED in default state (end of init phase) */
951 pcan_usb_fd_set_can_led(dev, PCAN_UFD_LED_DEF);
952
953 return 0;
954
955 err_out_2:
956 kfree(pdev->cmd_buffer_addr);
957 err_out_1:
958 kfree(pdev->usb_if);
959 err_out:
960 return err;
961 }
962
963 /* called when driver module is being unloaded */
pcan_usb_fd_exit(struct peak_usb_device * dev)964 static void pcan_usb_fd_exit(struct peak_usb_device *dev)
965 {
966 struct pcan_usb_fd_device *pdev =
967 container_of(dev, struct pcan_usb_fd_device, dev);
968
969 /* when rmmod called before unplug and if down, should reset things
970 * before leaving
971 */
972 if (dev->can.state != CAN_STATE_STOPPED) {
973 /* set bus off on the corresponding channel */
974 pcan_usb_fd_set_bus(dev, 0);
975 }
976
977 /* switch off corresponding CAN LEDs */
978 pcan_usb_fd_set_can_led(dev, PCAN_UFD_LED_OFF);
979
980 /* if channel #0 (only) */
981 if (dev->ctrl_idx == 0) {
982 /* turn off calibration message if any device were opened */
983 if (pdev->usb_if->dev_opened_count > 0)
984 pcan_usb_fd_set_options(dev, 0,
985 PUCAN_OPTION_ERROR,
986 PCAN_UFD_FLTEXT_CALIBRATION);
987
988 /* tell USB adapter that the driver is being unloaded */
989 pcan_usb_fd_drv_loaded(dev, 0);
990 }
991 }
992
993 /* called when the USB adapter is unplugged */
pcan_usb_fd_free(struct peak_usb_device * dev)994 static void pcan_usb_fd_free(struct peak_usb_device *dev)
995 {
996 /* last device: can free shared objects now */
997 if (!dev->prev_siblings && !dev->next_siblings) {
998 struct pcan_usb_fd_device *pdev =
999 container_of(dev, struct pcan_usb_fd_device, dev);
1000
1001 /* free commands buffer */
1002 kfree(pdev->cmd_buffer_addr);
1003
1004 /* free usb interface object */
1005 kfree(pdev->usb_if);
1006 }
1007 }
1008
1009 /* describes the PCAN-USB FD adapter */
1010 static const struct can_bittiming_const pcan_usb_fd_const = {
1011 .name = "pcan_usb_fd",
1012 .tseg1_min = 1,
1013 .tseg1_max = (1 << PUCAN_TSLOW_TSGEG1_BITS),
1014 .tseg2_min = 1,
1015 .tseg2_max = (1 << PUCAN_TSLOW_TSGEG2_BITS),
1016 .sjw_max = (1 << PUCAN_TSLOW_SJW_BITS),
1017 .brp_min = 1,
1018 .brp_max = (1 << PUCAN_TSLOW_BRP_BITS),
1019 .brp_inc = 1,
1020 };
1021
1022 static const struct can_bittiming_const pcan_usb_fd_data_const = {
1023 .name = "pcan_usb_fd",
1024 .tseg1_min = 1,
1025 .tseg1_max = (1 << PUCAN_TFAST_TSGEG1_BITS),
1026 .tseg2_min = 1,
1027 .tseg2_max = (1 << PUCAN_TFAST_TSGEG2_BITS),
1028 .sjw_max = (1 << PUCAN_TFAST_SJW_BITS),
1029 .brp_min = 1,
1030 .brp_max = (1 << PUCAN_TFAST_BRP_BITS),
1031 .brp_inc = 1,
1032 };
1033
1034 const struct peak_usb_adapter pcan_usb_fd = {
1035 .name = "PCAN-USB FD",
1036 .device_id = PCAN_USBFD_PRODUCT_ID,
1037 .ctrl_count = PCAN_USBFD_CHANNEL_COUNT,
1038 .ctrlmode_supported = CAN_CTRLMODE_FD |
1039 CAN_CTRLMODE_3_SAMPLES | CAN_CTRLMODE_LISTENONLY,
1040 .clock = {
1041 .freq = PCAN_UFD_CRYSTAL_HZ,
1042 },
1043 .bittiming_const = &pcan_usb_fd_const,
1044 .data_bittiming_const = &pcan_usb_fd_data_const,
1045
1046 /* size of device private data */
1047 .sizeof_dev_private = sizeof(struct pcan_usb_fd_device),
1048
1049 /* timestamps usage */
1050 .ts_used_bits = 32,
1051 .ts_period = 1000000, /* calibration period in ts. */
1052 .us_per_ts_scale = 1, /* us = (ts * scale) >> shift */
1053 .us_per_ts_shift = 0,
1054
1055 /* give here messages in/out endpoints */
1056 .ep_msg_in = PCAN_USBPRO_EP_MSGIN,
1057 .ep_msg_out = {PCAN_USBPRO_EP_MSGOUT_0},
1058
1059 /* size of rx/tx usb buffers */
1060 .rx_buffer_size = PCAN_UFD_RX_BUFFER_SIZE,
1061 .tx_buffer_size = PCAN_UFD_TX_BUFFER_SIZE,
1062
1063 /* device callbacks */
1064 .intf_probe = pcan_usb_pro_probe, /* same as PCAN-USB Pro */
1065 .dev_init = pcan_usb_fd_init,
1066
1067 .dev_exit = pcan_usb_fd_exit,
1068 .dev_free = pcan_usb_fd_free,
1069 .dev_set_bus = pcan_usb_fd_set_bus,
1070 .dev_set_bittiming = pcan_usb_fd_set_bittiming_slow,
1071 .dev_set_data_bittiming = pcan_usb_fd_set_bittiming_fast,
1072 .dev_decode_buf = pcan_usb_fd_decode_buf,
1073 .dev_start = pcan_usb_fd_start,
1074 .dev_stop = pcan_usb_fd_stop,
1075 .dev_restart_async = pcan_usb_fd_restart_async,
1076 .dev_encode_msg = pcan_usb_fd_encode_msg,
1077
1078 .do_get_berr_counter = pcan_usb_fd_get_berr_counter,
1079 };
1080
1081 /* describes the PCAN-CHIP USB */
1082 static const struct can_bittiming_const pcan_usb_chip_const = {
1083 .name = "pcan_chip_usb",
1084 .tseg1_min = 1,
1085 .tseg1_max = (1 << PUCAN_TSLOW_TSGEG1_BITS),
1086 .tseg2_min = 1,
1087 .tseg2_max = (1 << PUCAN_TSLOW_TSGEG2_BITS),
1088 .sjw_max = (1 << PUCAN_TSLOW_SJW_BITS),
1089 .brp_min = 1,
1090 .brp_max = (1 << PUCAN_TSLOW_BRP_BITS),
1091 .brp_inc = 1,
1092 };
1093
1094 static const struct can_bittiming_const pcan_usb_chip_data_const = {
1095 .name = "pcan_chip_usb",
1096 .tseg1_min = 1,
1097 .tseg1_max = (1 << PUCAN_TFAST_TSGEG1_BITS),
1098 .tseg2_min = 1,
1099 .tseg2_max = (1 << PUCAN_TFAST_TSGEG2_BITS),
1100 .sjw_max = (1 << PUCAN_TFAST_SJW_BITS),
1101 .brp_min = 1,
1102 .brp_max = (1 << PUCAN_TFAST_BRP_BITS),
1103 .brp_inc = 1,
1104 };
1105
1106 const struct peak_usb_adapter pcan_usb_chip = {
1107 .name = "PCAN-Chip USB",
1108 .device_id = PCAN_USBCHIP_PRODUCT_ID,
1109 .ctrl_count = PCAN_USBFD_CHANNEL_COUNT,
1110 .ctrlmode_supported = CAN_CTRLMODE_FD |
1111 CAN_CTRLMODE_3_SAMPLES | CAN_CTRLMODE_LISTENONLY,
1112 .clock = {
1113 .freq = PCAN_UFD_CRYSTAL_HZ,
1114 },
1115 .bittiming_const = &pcan_usb_chip_const,
1116 .data_bittiming_const = &pcan_usb_chip_data_const,
1117
1118 /* size of device private data */
1119 .sizeof_dev_private = sizeof(struct pcan_usb_fd_device),
1120
1121 /* timestamps usage */
1122 .ts_used_bits = 32,
1123 .ts_period = 1000000, /* calibration period in ts. */
1124 .us_per_ts_scale = 1, /* us = (ts * scale) >> shift */
1125 .us_per_ts_shift = 0,
1126
1127 /* give here messages in/out endpoints */
1128 .ep_msg_in = PCAN_USBPRO_EP_MSGIN,
1129 .ep_msg_out = {PCAN_USBPRO_EP_MSGOUT_0},
1130
1131 /* size of rx/tx usb buffers */
1132 .rx_buffer_size = PCAN_UFD_RX_BUFFER_SIZE,
1133 .tx_buffer_size = PCAN_UFD_TX_BUFFER_SIZE,
1134
1135 /* device callbacks */
1136 .intf_probe = pcan_usb_pro_probe, /* same as PCAN-USB Pro */
1137 .dev_init = pcan_usb_fd_init,
1138
1139 .dev_exit = pcan_usb_fd_exit,
1140 .dev_free = pcan_usb_fd_free,
1141 .dev_set_bus = pcan_usb_fd_set_bus,
1142 .dev_set_bittiming = pcan_usb_fd_set_bittiming_slow,
1143 .dev_set_data_bittiming = pcan_usb_fd_set_bittiming_fast,
1144 .dev_decode_buf = pcan_usb_fd_decode_buf,
1145 .dev_start = pcan_usb_fd_start,
1146 .dev_stop = pcan_usb_fd_stop,
1147 .dev_restart_async = pcan_usb_fd_restart_async,
1148 .dev_encode_msg = pcan_usb_fd_encode_msg,
1149
1150 .do_get_berr_counter = pcan_usb_fd_get_berr_counter,
1151 };
1152
1153 /* describes the PCAN-USB Pro FD adapter */
1154 static const struct can_bittiming_const pcan_usb_pro_fd_const = {
1155 .name = "pcan_usb_pro_fd",
1156 .tseg1_min = 1,
1157 .tseg1_max = (1 << PUCAN_TSLOW_TSGEG1_BITS),
1158 .tseg2_min = 1,
1159 .tseg2_max = (1 << PUCAN_TSLOW_TSGEG2_BITS),
1160 .sjw_max = (1 << PUCAN_TSLOW_SJW_BITS),
1161 .brp_min = 1,
1162 .brp_max = (1 << PUCAN_TSLOW_BRP_BITS),
1163 .brp_inc = 1,
1164 };
1165
1166 static const struct can_bittiming_const pcan_usb_pro_fd_data_const = {
1167 .name = "pcan_usb_pro_fd",
1168 .tseg1_min = 1,
1169 .tseg1_max = (1 << PUCAN_TFAST_TSGEG1_BITS),
1170 .tseg2_min = 1,
1171 .tseg2_max = (1 << PUCAN_TFAST_TSGEG2_BITS),
1172 .sjw_max = (1 << PUCAN_TFAST_SJW_BITS),
1173 .brp_min = 1,
1174 .brp_max = (1 << PUCAN_TFAST_BRP_BITS),
1175 .brp_inc = 1,
1176 };
1177
1178 const struct peak_usb_adapter pcan_usb_pro_fd = {
1179 .name = "PCAN-USB Pro FD",
1180 .device_id = PCAN_USBPROFD_PRODUCT_ID,
1181 .ctrl_count = PCAN_USBPROFD_CHANNEL_COUNT,
1182 .ctrlmode_supported = CAN_CTRLMODE_FD |
1183 CAN_CTRLMODE_3_SAMPLES | CAN_CTRLMODE_LISTENONLY,
1184 .clock = {
1185 .freq = PCAN_UFD_CRYSTAL_HZ,
1186 },
1187 .bittiming_const = &pcan_usb_pro_fd_const,
1188 .data_bittiming_const = &pcan_usb_pro_fd_data_const,
1189
1190 /* size of device private data */
1191 .sizeof_dev_private = sizeof(struct pcan_usb_fd_device),
1192
1193 /* timestamps usage */
1194 .ts_used_bits = 32,
1195 .ts_period = 1000000, /* calibration period in ts. */
1196 .us_per_ts_scale = 1, /* us = (ts * scale) >> shift */
1197 .us_per_ts_shift = 0,
1198
1199 /* give here messages in/out endpoints */
1200 .ep_msg_in = PCAN_USBPRO_EP_MSGIN,
1201 .ep_msg_out = {PCAN_USBPRO_EP_MSGOUT_0, PCAN_USBPRO_EP_MSGOUT_1},
1202
1203 /* size of rx/tx usb buffers */
1204 .rx_buffer_size = PCAN_UFD_RX_BUFFER_SIZE,
1205 .tx_buffer_size = PCAN_UFD_TX_BUFFER_SIZE,
1206
1207 /* device callbacks */
1208 .intf_probe = pcan_usb_pro_probe, /* same as PCAN-USB Pro */
1209 .dev_init = pcan_usb_fd_init,
1210
1211 .dev_exit = pcan_usb_fd_exit,
1212 .dev_free = pcan_usb_fd_free,
1213 .dev_set_bus = pcan_usb_fd_set_bus,
1214 .dev_set_bittiming = pcan_usb_fd_set_bittiming_slow,
1215 .dev_set_data_bittiming = pcan_usb_fd_set_bittiming_fast,
1216 .dev_decode_buf = pcan_usb_fd_decode_buf,
1217 .dev_start = pcan_usb_fd_start,
1218 .dev_stop = pcan_usb_fd_stop,
1219 .dev_restart_async = pcan_usb_fd_restart_async,
1220 .dev_encode_msg = pcan_usb_fd_encode_msg,
1221
1222 .do_get_berr_counter = pcan_usb_fd_get_berr_counter,
1223 };
1224
1225 /* describes the PCAN-USB X6 adapter */
1226 static const struct can_bittiming_const pcan_usb_x6_const = {
1227 .name = "pcan_usb_x6",
1228 .tseg1_min = 1,
1229 .tseg1_max = (1 << PUCAN_TSLOW_TSGEG1_BITS),
1230 .tseg2_min = 1,
1231 .tseg2_max = (1 << PUCAN_TSLOW_TSGEG2_BITS),
1232 .sjw_max = (1 << PUCAN_TSLOW_SJW_BITS),
1233 .brp_min = 1,
1234 .brp_max = (1 << PUCAN_TSLOW_BRP_BITS),
1235 .brp_inc = 1,
1236 };
1237
1238 static const struct can_bittiming_const pcan_usb_x6_data_const = {
1239 .name = "pcan_usb_x6",
1240 .tseg1_min = 1,
1241 .tseg1_max = (1 << PUCAN_TFAST_TSGEG1_BITS),
1242 .tseg2_min = 1,
1243 .tseg2_max = (1 << PUCAN_TFAST_TSGEG2_BITS),
1244 .sjw_max = (1 << PUCAN_TFAST_SJW_BITS),
1245 .brp_min = 1,
1246 .brp_max = (1 << PUCAN_TFAST_BRP_BITS),
1247 .brp_inc = 1,
1248 };
1249
1250 const struct peak_usb_adapter pcan_usb_x6 = {
1251 .name = "PCAN-USB X6",
1252 .device_id = PCAN_USBX6_PRODUCT_ID,
1253 .ctrl_count = PCAN_USBPROFD_CHANNEL_COUNT,
1254 .ctrlmode_supported = CAN_CTRLMODE_FD |
1255 CAN_CTRLMODE_3_SAMPLES | CAN_CTRLMODE_LISTENONLY,
1256 .clock = {
1257 .freq = PCAN_UFD_CRYSTAL_HZ,
1258 },
1259 .bittiming_const = &pcan_usb_x6_const,
1260 .data_bittiming_const = &pcan_usb_x6_data_const,
1261
1262 /* size of device private data */
1263 .sizeof_dev_private = sizeof(struct pcan_usb_fd_device),
1264
1265 /* timestamps usage */
1266 .ts_used_bits = 32,
1267 .ts_period = 1000000, /* calibration period in ts. */
1268 .us_per_ts_scale = 1, /* us = (ts * scale) >> shift */
1269 .us_per_ts_shift = 0,
1270
1271 /* give here messages in/out endpoints */
1272 .ep_msg_in = PCAN_USBPRO_EP_MSGIN,
1273 .ep_msg_out = {PCAN_USBPRO_EP_MSGOUT_0, PCAN_USBPRO_EP_MSGOUT_1},
1274
1275 /* size of rx/tx usb buffers */
1276 .rx_buffer_size = PCAN_UFD_RX_BUFFER_SIZE,
1277 .tx_buffer_size = PCAN_UFD_TX_BUFFER_SIZE,
1278
1279 /* device callbacks */
1280 .intf_probe = pcan_usb_pro_probe, /* same as PCAN-USB Pro */
1281 .dev_init = pcan_usb_fd_init,
1282
1283 .dev_exit = pcan_usb_fd_exit,
1284 .dev_free = pcan_usb_fd_free,
1285 .dev_set_bus = pcan_usb_fd_set_bus,
1286 .dev_set_bittiming = pcan_usb_fd_set_bittiming_slow,
1287 .dev_set_data_bittiming = pcan_usb_fd_set_bittiming_fast,
1288 .dev_decode_buf = pcan_usb_fd_decode_buf,
1289 .dev_start = pcan_usb_fd_start,
1290 .dev_stop = pcan_usb_fd_stop,
1291 .dev_restart_async = pcan_usb_fd_restart_async,
1292 .dev_encode_msg = pcan_usb_fd_encode_msg,
1293
1294 .do_get_berr_counter = pcan_usb_fd_get_berr_counter,
1295 };
1296