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 devcie */
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 = usb_if->dev[pucan_msg_get_channel(rm)];
472 struct net_device *netdev = dev->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 (rx_msg_flags & PUCAN_MSG_EXT_DATA_LEN) {
478 /* CANFD frame case */
479 skb = alloc_canfd_skb(netdev, &cfd);
480 if (!skb)
481 return -ENOMEM;
482
483 if (rx_msg_flags & PUCAN_MSG_BITRATE_SWITCH)
484 cfd->flags |= CANFD_BRS;
485
486 if (rx_msg_flags & PUCAN_MSG_ERROR_STATE_IND)
487 cfd->flags |= CANFD_ESI;
488
489 cfd->len = can_dlc2len(get_canfd_dlc(pucan_msg_get_dlc(rm)));
490 } else {
491 /* CAN 2.0 frame case */
492 skb = alloc_can_skb(netdev, (struct can_frame **)&cfd);
493 if (!skb)
494 return -ENOMEM;
495
496 cfd->len = get_can_dlc(pucan_msg_get_dlc(rm));
497 }
498
499 cfd->can_id = le32_to_cpu(rm->can_id);
500
501 if (rx_msg_flags & PUCAN_MSG_EXT_ID)
502 cfd->can_id |= CAN_EFF_FLAG;
503
504 if (rx_msg_flags & PUCAN_MSG_RTR)
505 cfd->can_id |= CAN_RTR_FLAG;
506 else
507 memcpy(cfd->data, rm->d, cfd->len);
508
509 peak_usb_netif_rx(skb, &usb_if->time_ref, le32_to_cpu(rm->ts_low));
510
511 netdev->stats.rx_packets++;
512 netdev->stats.rx_bytes += cfd->len;
513
514 return 0;
515 }
516
517 /* handle uCAN status message */
pcan_usb_fd_decode_status(struct pcan_usb_fd_if * usb_if,struct pucan_msg * rx_msg)518 static int pcan_usb_fd_decode_status(struct pcan_usb_fd_if *usb_if,
519 struct pucan_msg *rx_msg)
520 {
521 struct pucan_status_msg *sm = (struct pucan_status_msg *)rx_msg;
522 struct peak_usb_device *dev = usb_if->dev[pucan_stmsg_get_channel(sm)];
523 struct pcan_usb_fd_device *pdev =
524 container_of(dev, struct pcan_usb_fd_device, dev);
525 enum can_state new_state = CAN_STATE_ERROR_ACTIVE;
526 enum can_state rx_state, tx_state;
527 struct net_device *netdev = dev->netdev;
528 struct can_frame *cf;
529 struct sk_buff *skb;
530
531 /* nothing should be sent while in BUS_OFF state */
532 if (dev->can.state == CAN_STATE_BUS_OFF)
533 return 0;
534
535 if (sm->channel_p_w_b & PUCAN_BUS_BUSOFF) {
536 new_state = CAN_STATE_BUS_OFF;
537 } else if (sm->channel_p_w_b & PUCAN_BUS_PASSIVE) {
538 new_state = CAN_STATE_ERROR_PASSIVE;
539 } else if (sm->channel_p_w_b & PUCAN_BUS_WARNING) {
540 new_state = CAN_STATE_ERROR_WARNING;
541 } else {
542 /* no error bit (so, no error skb, back to active state) */
543 dev->can.state = CAN_STATE_ERROR_ACTIVE;
544 pdev->bec.txerr = 0;
545 pdev->bec.rxerr = 0;
546 return 0;
547 }
548
549 /* state hasn't changed */
550 if (new_state == dev->can.state)
551 return 0;
552
553 /* handle bus state change */
554 tx_state = (pdev->bec.txerr >= pdev->bec.rxerr) ? new_state : 0;
555 rx_state = (pdev->bec.txerr <= pdev->bec.rxerr) ? new_state : 0;
556
557 /* allocate an skb to store the error frame */
558 skb = alloc_can_err_skb(netdev, &cf);
559 if (skb)
560 can_change_state(netdev, cf, tx_state, rx_state);
561
562 /* things must be done even in case of OOM */
563 if (new_state == CAN_STATE_BUS_OFF)
564 can_bus_off(netdev);
565
566 if (!skb)
567 return -ENOMEM;
568
569 peak_usb_netif_rx(skb, &usb_if->time_ref, le32_to_cpu(sm->ts_low));
570
571 netdev->stats.rx_packets++;
572 netdev->stats.rx_bytes += cf->can_dlc;
573
574 return 0;
575 }
576
577 /* handle uCAN error message */
pcan_usb_fd_decode_error(struct pcan_usb_fd_if * usb_if,struct pucan_msg * rx_msg)578 static int pcan_usb_fd_decode_error(struct pcan_usb_fd_if *usb_if,
579 struct pucan_msg *rx_msg)
580 {
581 struct pucan_error_msg *er = (struct pucan_error_msg *)rx_msg;
582 struct peak_usb_device *dev = usb_if->dev[pucan_ermsg_get_channel(er)];
583 struct pcan_usb_fd_device *pdev =
584 container_of(dev, struct pcan_usb_fd_device, dev);
585
586 /* keep a trace of tx and rx error counters for later use */
587 pdev->bec.txerr = er->tx_err_cnt;
588 pdev->bec.rxerr = er->rx_err_cnt;
589
590 return 0;
591 }
592
593 /* handle uCAN overrun message */
pcan_usb_fd_decode_overrun(struct pcan_usb_fd_if * usb_if,struct pucan_msg * rx_msg)594 static int pcan_usb_fd_decode_overrun(struct pcan_usb_fd_if *usb_if,
595 struct pucan_msg *rx_msg)
596 {
597 struct pcan_ufd_ovr_msg *ov = (struct pcan_ufd_ovr_msg *)rx_msg;
598 struct peak_usb_device *dev = usb_if->dev[pufd_omsg_get_channel(ov)];
599 struct net_device *netdev = dev->netdev;
600 struct can_frame *cf;
601 struct sk_buff *skb;
602
603 /* allocate an skb to store the error frame */
604 skb = alloc_can_err_skb(netdev, &cf);
605 if (!skb)
606 return -ENOMEM;
607
608 cf->can_id |= CAN_ERR_CRTL;
609 cf->data[1] |= CAN_ERR_CRTL_RX_OVERFLOW;
610
611 peak_usb_netif_rx(skb, &usb_if->time_ref, le32_to_cpu(ov->ts_low));
612
613 netdev->stats.rx_over_errors++;
614 netdev->stats.rx_errors++;
615
616 return 0;
617 }
618
619 /* handle USB calibration message */
pcan_usb_fd_decode_ts(struct pcan_usb_fd_if * usb_if,struct pucan_msg * rx_msg)620 static void pcan_usb_fd_decode_ts(struct pcan_usb_fd_if *usb_if,
621 struct pucan_msg *rx_msg)
622 {
623 struct pcan_ufd_ts_msg *ts = (struct pcan_ufd_ts_msg *)rx_msg;
624
625 /* should wait until clock is stabilized */
626 if (usb_if->cm_ignore_count > 0)
627 usb_if->cm_ignore_count--;
628 else
629 peak_usb_set_ts_now(&usb_if->time_ref, le32_to_cpu(ts->ts_low));
630 }
631
632 /* callback for bulk IN urb */
pcan_usb_fd_decode_buf(struct peak_usb_device * dev,struct urb * urb)633 static int pcan_usb_fd_decode_buf(struct peak_usb_device *dev, struct urb *urb)
634 {
635 struct pcan_usb_fd_if *usb_if = pcan_usb_fd_dev_if(dev);
636 struct net_device *netdev = dev->netdev;
637 struct pucan_msg *rx_msg;
638 u8 *msg_ptr, *msg_end;
639 int err = 0;
640
641 /* loop reading all the records from the incoming message */
642 msg_ptr = urb->transfer_buffer;
643 msg_end = urb->transfer_buffer + urb->actual_length;
644 for (; msg_ptr < msg_end;) {
645 u16 rx_msg_type, rx_msg_size;
646
647 rx_msg = (struct pucan_msg *)msg_ptr;
648 if (!rx_msg->size) {
649 /* null packet found: end of list */
650 break;
651 }
652
653 rx_msg_size = le16_to_cpu(rx_msg->size);
654 rx_msg_type = le16_to_cpu(rx_msg->type);
655
656 /* check if the record goes out of current packet */
657 if (msg_ptr + rx_msg_size > msg_end) {
658 netdev_err(netdev,
659 "got frag rec: should inc usb rx buf sze\n");
660 err = -EBADMSG;
661 break;
662 }
663
664 switch (rx_msg_type) {
665 case PUCAN_MSG_CAN_RX:
666 err = pcan_usb_fd_decode_canmsg(usb_if, rx_msg);
667 if (err < 0)
668 goto fail;
669 break;
670
671 case PCAN_UFD_MSG_CALIBRATION:
672 pcan_usb_fd_decode_ts(usb_if, rx_msg);
673 break;
674
675 case PUCAN_MSG_ERROR:
676 err = pcan_usb_fd_decode_error(usb_if, rx_msg);
677 if (err < 0)
678 goto fail;
679 break;
680
681 case PUCAN_MSG_STATUS:
682 err = pcan_usb_fd_decode_status(usb_if, rx_msg);
683 if (err < 0)
684 goto fail;
685 break;
686
687 case PCAN_UFD_MSG_OVERRUN:
688 err = pcan_usb_fd_decode_overrun(usb_if, rx_msg);
689 if (err < 0)
690 goto fail;
691 break;
692
693 default:
694 netdev_err(netdev,
695 "unhandled msg type 0x%02x (%d): ignored\n",
696 rx_msg_type, rx_msg_type);
697 break;
698 }
699
700 msg_ptr += rx_msg_size;
701 }
702
703 fail:
704 if (err)
705 pcan_dump_mem("received msg",
706 urb->transfer_buffer, urb->actual_length);
707 return err;
708 }
709
710 /* CAN/CANFD frames encoding callback */
pcan_usb_fd_encode_msg(struct peak_usb_device * dev,struct sk_buff * skb,u8 * obuf,size_t * size)711 static int pcan_usb_fd_encode_msg(struct peak_usb_device *dev,
712 struct sk_buff *skb, u8 *obuf, size_t *size)
713 {
714 struct pucan_tx_msg *tx_msg = (struct pucan_tx_msg *)obuf;
715 struct canfd_frame *cfd = (struct canfd_frame *)skb->data;
716 u16 tx_msg_size, tx_msg_flags;
717 u8 can_dlc;
718
719 tx_msg_size = ALIGN(sizeof(struct pucan_tx_msg) + cfd->len, 4);
720 tx_msg->size = cpu_to_le16(tx_msg_size);
721 tx_msg->type = cpu_to_le16(PUCAN_MSG_CAN_TX);
722
723 tx_msg_flags = 0;
724 if (cfd->can_id & CAN_EFF_FLAG) {
725 tx_msg_flags |= PUCAN_MSG_EXT_ID;
726 tx_msg->can_id = cpu_to_le32(cfd->can_id & CAN_EFF_MASK);
727 } else {
728 tx_msg->can_id = cpu_to_le32(cfd->can_id & CAN_SFF_MASK);
729 }
730
731 if (can_is_canfd_skb(skb)) {
732 /* considering a CANFD frame */
733 can_dlc = can_len2dlc(cfd->len);
734
735 tx_msg_flags |= PUCAN_MSG_EXT_DATA_LEN;
736
737 if (cfd->flags & CANFD_BRS)
738 tx_msg_flags |= PUCAN_MSG_BITRATE_SWITCH;
739
740 if (cfd->flags & CANFD_ESI)
741 tx_msg_flags |= PUCAN_MSG_ERROR_STATE_IND;
742 } else {
743 /* CAND 2.0 frames */
744 can_dlc = cfd->len;
745
746 if (cfd->can_id & CAN_RTR_FLAG)
747 tx_msg_flags |= PUCAN_MSG_RTR;
748 }
749
750 tx_msg->flags = cpu_to_le16(tx_msg_flags);
751 tx_msg->channel_dlc = PUCAN_MSG_CHANNEL_DLC(dev->ctrl_idx, can_dlc);
752 memcpy(tx_msg->d, cfd->data, cfd->len);
753
754 /* add null size message to tag the end (messages are 32-bits aligned)
755 */
756 tx_msg = (struct pucan_tx_msg *)(obuf + tx_msg_size);
757
758 tx_msg->size = 0;
759
760 /* set the whole size of the USB packet to send */
761 *size = tx_msg_size + sizeof(u32);
762
763 return 0;
764 }
765
766 /* start the interface (last chance before set bus on) */
pcan_usb_fd_start(struct peak_usb_device * dev)767 static int pcan_usb_fd_start(struct peak_usb_device *dev)
768 {
769 struct pcan_usb_fd_device *pdev =
770 container_of(dev, struct pcan_usb_fd_device, dev);
771 int err;
772
773 /* set filter mode: all acceptance */
774 err = pcan_usb_fd_set_filter_std(dev, -1, 0xffffffff);
775 if (err)
776 return err;
777
778 /* opening first device: */
779 if (pdev->usb_if->dev_opened_count == 0) {
780 /* reset time_ref */
781 peak_usb_init_time_ref(&pdev->usb_if->time_ref,
782 &pcan_usb_pro_fd);
783
784 /* enable USB calibration messages */
785 err = pcan_usb_fd_set_options(dev, 1,
786 PUCAN_OPTION_ERROR,
787 PCAN_UFD_FLTEXT_CALIBRATION);
788 }
789
790 pdev->usb_if->dev_opened_count++;
791
792 /* reset cached error counters */
793 pdev->bec.txerr = 0;
794 pdev->bec.rxerr = 0;
795
796 return err;
797 }
798
799 /* socket callback used to copy berr counters values receieved through USB */
pcan_usb_fd_get_berr_counter(const struct net_device * netdev,struct can_berr_counter * bec)800 static int pcan_usb_fd_get_berr_counter(const struct net_device *netdev,
801 struct can_berr_counter *bec)
802 {
803 struct peak_usb_device *dev = netdev_priv(netdev);
804 struct pcan_usb_fd_device *pdev =
805 container_of(dev, struct pcan_usb_fd_device, dev);
806
807 *bec = pdev->bec;
808
809 /* must return 0 */
810 return 0;
811 }
812
813 /* stop interface (last chance before set bus off) */
pcan_usb_fd_stop(struct peak_usb_device * dev)814 static int pcan_usb_fd_stop(struct peak_usb_device *dev)
815 {
816 struct pcan_usb_fd_device *pdev =
817 container_of(dev, struct pcan_usb_fd_device, dev);
818
819 /* turn off special msgs for that interface if no other dev opened */
820 if (pdev->usb_if->dev_opened_count == 1)
821 pcan_usb_fd_set_options(dev, 0,
822 PUCAN_OPTION_ERROR,
823 PCAN_UFD_FLTEXT_CALIBRATION);
824 pdev->usb_if->dev_opened_count--;
825
826 return 0;
827 }
828
829 /* called when probing, to initialize a device object */
pcan_usb_fd_init(struct peak_usb_device * dev)830 static int pcan_usb_fd_init(struct peak_usb_device *dev)
831 {
832 struct pcan_usb_fd_device *pdev =
833 container_of(dev, struct pcan_usb_fd_device, dev);
834 int i, err = -ENOMEM;
835
836 /* do this for 1st channel only */
837 if (!dev->prev_siblings) {
838 /* allocate netdevices common structure attached to first one */
839 pdev->usb_if = kzalloc(sizeof(*pdev->usb_if), GFP_KERNEL);
840 if (!pdev->usb_if)
841 goto err_out;
842
843 /* allocate command buffer once for all for the interface */
844 pdev->cmd_buffer_addr = kzalloc(PCAN_UFD_CMD_BUFFER_SIZE,
845 GFP_KERNEL);
846 if (!pdev->cmd_buffer_addr)
847 goto err_out_1;
848
849 /* number of ts msgs to ignore before taking one into account */
850 pdev->usb_if->cm_ignore_count = 5;
851
852 err = pcan_usb_pro_send_req(dev, PCAN_USBPRO_REQ_INFO,
853 PCAN_USBPRO_INFO_FW,
854 &pdev->usb_if->fw_info,
855 sizeof(pdev->usb_if->fw_info));
856 if (err) {
857 dev_err(dev->netdev->dev.parent,
858 "unable to read %s firmware info (err %d)\n",
859 dev->adapter->name, err);
860 goto err_out_2;
861 }
862
863 /* explicit use of dev_xxx() instead of netdev_xxx() here:
864 * information displayed are related to the device itself, not
865 * to the canx (channel) device.
866 */
867 dev_info(dev->netdev->dev.parent,
868 "PEAK-System %s v%u fw v%u.%u.%u (%u channels)\n",
869 dev->adapter->name, pdev->usb_if->fw_info.hw_version,
870 pdev->usb_if->fw_info.fw_version[0],
871 pdev->usb_if->fw_info.fw_version[1],
872 pdev->usb_if->fw_info.fw_version[2],
873 dev->adapter->ctrl_count);
874
875 /* check for ability to switch between ISO/non-ISO modes */
876 if (pdev->usb_if->fw_info.fw_version[0] >= 2) {
877 /* firmware >= 2.x supports ISO/non-ISO switching */
878 dev->can.ctrlmode_supported |= CAN_CTRLMODE_FD_NON_ISO;
879 } else {
880 /* firmware < 2.x only supports fixed(!) non-ISO */
881 dev->can.ctrlmode |= CAN_CTRLMODE_FD_NON_ISO;
882 }
883
884 /* tell the hardware the can driver is running */
885 err = pcan_usb_fd_drv_loaded(dev, 1);
886 if (err) {
887 dev_err(dev->netdev->dev.parent,
888 "unable to tell %s driver is loaded (err %d)\n",
889 dev->adapter->name, err);
890 goto err_out_2;
891 }
892 } else {
893 /* otherwise, simply copy previous sibling's values */
894 struct pcan_usb_fd_device *ppdev =
895 container_of(dev->prev_siblings,
896 struct pcan_usb_fd_device, dev);
897
898 pdev->usb_if = ppdev->usb_if;
899 pdev->cmd_buffer_addr = ppdev->cmd_buffer_addr;
900
901 /* do a copy of the ctrlmode[_supported] too */
902 dev->can.ctrlmode = ppdev->dev.can.ctrlmode;
903 dev->can.ctrlmode_supported = ppdev->dev.can.ctrlmode_supported;
904 }
905
906 pdev->usb_if->dev[dev->ctrl_idx] = dev;
907 dev->device_number =
908 le32_to_cpu(pdev->usb_if->fw_info.dev_id[dev->ctrl_idx]);
909
910 /* set clock domain */
911 for (i = 0; i < ARRAY_SIZE(pcan_usb_fd_clk_freq); i++)
912 if (dev->adapter->clock.freq == pcan_usb_fd_clk_freq[i])
913 break;
914
915 if (i >= ARRAY_SIZE(pcan_usb_fd_clk_freq)) {
916 dev_warn(dev->netdev->dev.parent,
917 "incompatible clock frequencies\n");
918 err = -EINVAL;
919 goto err_out_2;
920 }
921
922 pcan_usb_fd_set_clock_domain(dev, i);
923
924 /* set LED in default state (end of init phase) */
925 pcan_usb_fd_set_can_led(dev, PCAN_UFD_LED_DEF);
926
927 return 0;
928
929 err_out_2:
930 kfree(pdev->cmd_buffer_addr);
931 err_out_1:
932 kfree(pdev->usb_if);
933 err_out:
934 return err;
935 }
936
937 /* called when driver module is being unloaded */
pcan_usb_fd_exit(struct peak_usb_device * dev)938 static void pcan_usb_fd_exit(struct peak_usb_device *dev)
939 {
940 struct pcan_usb_fd_device *pdev =
941 container_of(dev, struct pcan_usb_fd_device, dev);
942
943 /* when rmmod called before unplug and if down, should reset things
944 * before leaving
945 */
946 if (dev->can.state != CAN_STATE_STOPPED) {
947 /* set bus off on the corresponding channel */
948 pcan_usb_fd_set_bus(dev, 0);
949 }
950
951 /* switch off corresponding CAN LEDs */
952 pcan_usb_fd_set_can_led(dev, PCAN_UFD_LED_OFF);
953
954 /* if channel #0 (only) */
955 if (dev->ctrl_idx == 0) {
956 /* turn off calibration message if any device were opened */
957 if (pdev->usb_if->dev_opened_count > 0)
958 pcan_usb_fd_set_options(dev, 0,
959 PUCAN_OPTION_ERROR,
960 PCAN_UFD_FLTEXT_CALIBRATION);
961
962 /* tell USB adapter that the driver is being unloaded */
963 pcan_usb_fd_drv_loaded(dev, 0);
964 }
965 }
966
967 /* called when the USB adapter is unplugged */
pcan_usb_fd_free(struct peak_usb_device * dev)968 static void pcan_usb_fd_free(struct peak_usb_device *dev)
969 {
970 /* last device: can free shared objects now */
971 if (!dev->prev_siblings && !dev->next_siblings) {
972 struct pcan_usb_fd_device *pdev =
973 container_of(dev, struct pcan_usb_fd_device, dev);
974
975 /* free commands buffer */
976 kfree(pdev->cmd_buffer_addr);
977
978 /* free usb interface object */
979 kfree(pdev->usb_if);
980 }
981 }
982
983 /* describes the PCAN-USB FD adapter */
984 static const struct can_bittiming_const pcan_usb_fd_const = {
985 .name = "pcan_usb_fd",
986 .tseg1_min = 1,
987 .tseg1_max = (1 << PUCAN_TSLOW_TSGEG1_BITS),
988 .tseg2_min = 1,
989 .tseg2_max = (1 << PUCAN_TSLOW_TSGEG2_BITS),
990 .sjw_max = (1 << PUCAN_TSLOW_SJW_BITS),
991 .brp_min = 1,
992 .brp_max = (1 << PUCAN_TSLOW_BRP_BITS),
993 .brp_inc = 1,
994 };
995
996 static const struct can_bittiming_const pcan_usb_fd_data_const = {
997 .name = "pcan_usb_fd",
998 .tseg1_min = 1,
999 .tseg1_max = (1 << PUCAN_TFAST_TSGEG1_BITS),
1000 .tseg2_min = 1,
1001 .tseg2_max = (1 << PUCAN_TFAST_TSGEG2_BITS),
1002 .sjw_max = (1 << PUCAN_TFAST_SJW_BITS),
1003 .brp_min = 1,
1004 .brp_max = (1 << PUCAN_TFAST_BRP_BITS),
1005 .brp_inc = 1,
1006 };
1007
1008 const struct peak_usb_adapter pcan_usb_fd = {
1009 .name = "PCAN-USB FD",
1010 .device_id = PCAN_USBFD_PRODUCT_ID,
1011 .ctrl_count = PCAN_USBFD_CHANNEL_COUNT,
1012 .ctrlmode_supported = CAN_CTRLMODE_FD |
1013 CAN_CTRLMODE_3_SAMPLES | CAN_CTRLMODE_LISTENONLY,
1014 .clock = {
1015 .freq = PCAN_UFD_CRYSTAL_HZ,
1016 },
1017 .bittiming_const = &pcan_usb_fd_const,
1018 .data_bittiming_const = &pcan_usb_fd_data_const,
1019
1020 /* size of device private data */
1021 .sizeof_dev_private = sizeof(struct pcan_usb_fd_device),
1022
1023 /* timestamps usage */
1024 .ts_used_bits = 32,
1025 .ts_period = 1000000, /* calibration period in ts. */
1026 .us_per_ts_scale = 1, /* us = (ts * scale) >> shift */
1027 .us_per_ts_shift = 0,
1028
1029 /* give here messages in/out endpoints */
1030 .ep_msg_in = PCAN_USBPRO_EP_MSGIN,
1031 .ep_msg_out = {PCAN_USBPRO_EP_MSGOUT_0},
1032
1033 /* size of rx/tx usb buffers */
1034 .rx_buffer_size = PCAN_UFD_RX_BUFFER_SIZE,
1035 .tx_buffer_size = PCAN_UFD_TX_BUFFER_SIZE,
1036
1037 /* device callbacks */
1038 .intf_probe = pcan_usb_pro_probe, /* same as PCAN-USB Pro */
1039 .dev_init = pcan_usb_fd_init,
1040
1041 .dev_exit = pcan_usb_fd_exit,
1042 .dev_free = pcan_usb_fd_free,
1043 .dev_set_bus = pcan_usb_fd_set_bus,
1044 .dev_set_bittiming = pcan_usb_fd_set_bittiming_slow,
1045 .dev_set_data_bittiming = pcan_usb_fd_set_bittiming_fast,
1046 .dev_decode_buf = pcan_usb_fd_decode_buf,
1047 .dev_start = pcan_usb_fd_start,
1048 .dev_stop = pcan_usb_fd_stop,
1049 .dev_restart_async = pcan_usb_fd_restart_async,
1050 .dev_encode_msg = pcan_usb_fd_encode_msg,
1051
1052 .do_get_berr_counter = pcan_usb_fd_get_berr_counter,
1053 };
1054
1055 /* describes the PCAN-CHIP USB */
1056 static const struct can_bittiming_const pcan_usb_chip_const = {
1057 .name = "pcan_chip_usb",
1058 .tseg1_min = 1,
1059 .tseg1_max = (1 << PUCAN_TSLOW_TSGEG1_BITS),
1060 .tseg2_min = 1,
1061 .tseg2_max = (1 << PUCAN_TSLOW_TSGEG2_BITS),
1062 .sjw_max = (1 << PUCAN_TSLOW_SJW_BITS),
1063 .brp_min = 1,
1064 .brp_max = (1 << PUCAN_TSLOW_BRP_BITS),
1065 .brp_inc = 1,
1066 };
1067
1068 static const struct can_bittiming_const pcan_usb_chip_data_const = {
1069 .name = "pcan_chip_usb",
1070 .tseg1_min = 1,
1071 .tseg1_max = (1 << PUCAN_TFAST_TSGEG1_BITS),
1072 .tseg2_min = 1,
1073 .tseg2_max = (1 << PUCAN_TFAST_TSGEG2_BITS),
1074 .sjw_max = (1 << PUCAN_TFAST_SJW_BITS),
1075 .brp_min = 1,
1076 .brp_max = (1 << PUCAN_TFAST_BRP_BITS),
1077 .brp_inc = 1,
1078 };
1079
1080 const struct peak_usb_adapter pcan_usb_chip = {
1081 .name = "PCAN-Chip USB",
1082 .device_id = PCAN_USBCHIP_PRODUCT_ID,
1083 .ctrl_count = PCAN_USBFD_CHANNEL_COUNT,
1084 .ctrlmode_supported = CAN_CTRLMODE_FD |
1085 CAN_CTRLMODE_3_SAMPLES | CAN_CTRLMODE_LISTENONLY,
1086 .clock = {
1087 .freq = PCAN_UFD_CRYSTAL_HZ,
1088 },
1089 .bittiming_const = &pcan_usb_chip_const,
1090 .data_bittiming_const = &pcan_usb_chip_data_const,
1091
1092 /* size of device private data */
1093 .sizeof_dev_private = sizeof(struct pcan_usb_fd_device),
1094
1095 /* timestamps usage */
1096 .ts_used_bits = 32,
1097 .ts_period = 1000000, /* calibration period in ts. */
1098 .us_per_ts_scale = 1, /* us = (ts * scale) >> shift */
1099 .us_per_ts_shift = 0,
1100
1101 /* give here messages in/out endpoints */
1102 .ep_msg_in = PCAN_USBPRO_EP_MSGIN,
1103 .ep_msg_out = {PCAN_USBPRO_EP_MSGOUT_0},
1104
1105 /* size of rx/tx usb buffers */
1106 .rx_buffer_size = PCAN_UFD_RX_BUFFER_SIZE,
1107 .tx_buffer_size = PCAN_UFD_TX_BUFFER_SIZE,
1108
1109 /* device callbacks */
1110 .intf_probe = pcan_usb_pro_probe, /* same as PCAN-USB Pro */
1111 .dev_init = pcan_usb_fd_init,
1112
1113 .dev_exit = pcan_usb_fd_exit,
1114 .dev_free = pcan_usb_fd_free,
1115 .dev_set_bus = pcan_usb_fd_set_bus,
1116 .dev_set_bittiming = pcan_usb_fd_set_bittiming_slow,
1117 .dev_set_data_bittiming = pcan_usb_fd_set_bittiming_fast,
1118 .dev_decode_buf = pcan_usb_fd_decode_buf,
1119 .dev_start = pcan_usb_fd_start,
1120 .dev_stop = pcan_usb_fd_stop,
1121 .dev_restart_async = pcan_usb_fd_restart_async,
1122 .dev_encode_msg = pcan_usb_fd_encode_msg,
1123
1124 .do_get_berr_counter = pcan_usb_fd_get_berr_counter,
1125 };
1126
1127 /* describes the PCAN-USB Pro FD adapter */
1128 static const struct can_bittiming_const pcan_usb_pro_fd_const = {
1129 .name = "pcan_usb_pro_fd",
1130 .tseg1_min = 1,
1131 .tseg1_max = (1 << PUCAN_TSLOW_TSGEG1_BITS),
1132 .tseg2_min = 1,
1133 .tseg2_max = (1 << PUCAN_TSLOW_TSGEG2_BITS),
1134 .sjw_max = (1 << PUCAN_TSLOW_SJW_BITS),
1135 .brp_min = 1,
1136 .brp_max = (1 << PUCAN_TSLOW_BRP_BITS),
1137 .brp_inc = 1,
1138 };
1139
1140 static const struct can_bittiming_const pcan_usb_pro_fd_data_const = {
1141 .name = "pcan_usb_pro_fd",
1142 .tseg1_min = 1,
1143 .tseg1_max = (1 << PUCAN_TFAST_TSGEG1_BITS),
1144 .tseg2_min = 1,
1145 .tseg2_max = (1 << PUCAN_TFAST_TSGEG2_BITS),
1146 .sjw_max = (1 << PUCAN_TFAST_SJW_BITS),
1147 .brp_min = 1,
1148 .brp_max = (1 << PUCAN_TFAST_BRP_BITS),
1149 .brp_inc = 1,
1150 };
1151
1152 const struct peak_usb_adapter pcan_usb_pro_fd = {
1153 .name = "PCAN-USB Pro FD",
1154 .device_id = PCAN_USBPROFD_PRODUCT_ID,
1155 .ctrl_count = PCAN_USBPROFD_CHANNEL_COUNT,
1156 .ctrlmode_supported = CAN_CTRLMODE_FD |
1157 CAN_CTRLMODE_3_SAMPLES | CAN_CTRLMODE_LISTENONLY,
1158 .clock = {
1159 .freq = PCAN_UFD_CRYSTAL_HZ,
1160 },
1161 .bittiming_const = &pcan_usb_pro_fd_const,
1162 .data_bittiming_const = &pcan_usb_pro_fd_data_const,
1163
1164 /* size of device private data */
1165 .sizeof_dev_private = sizeof(struct pcan_usb_fd_device),
1166
1167 /* timestamps usage */
1168 .ts_used_bits = 32,
1169 .ts_period = 1000000, /* calibration period in ts. */
1170 .us_per_ts_scale = 1, /* us = (ts * scale) >> shift */
1171 .us_per_ts_shift = 0,
1172
1173 /* give here messages in/out endpoints */
1174 .ep_msg_in = PCAN_USBPRO_EP_MSGIN,
1175 .ep_msg_out = {PCAN_USBPRO_EP_MSGOUT_0, PCAN_USBPRO_EP_MSGOUT_1},
1176
1177 /* size of rx/tx usb buffers */
1178 .rx_buffer_size = PCAN_UFD_RX_BUFFER_SIZE,
1179 .tx_buffer_size = PCAN_UFD_TX_BUFFER_SIZE,
1180
1181 /* device callbacks */
1182 .intf_probe = pcan_usb_pro_probe, /* same as PCAN-USB Pro */
1183 .dev_init = pcan_usb_fd_init,
1184
1185 .dev_exit = pcan_usb_fd_exit,
1186 .dev_free = pcan_usb_fd_free,
1187 .dev_set_bus = pcan_usb_fd_set_bus,
1188 .dev_set_bittiming = pcan_usb_fd_set_bittiming_slow,
1189 .dev_set_data_bittiming = pcan_usb_fd_set_bittiming_fast,
1190 .dev_decode_buf = pcan_usb_fd_decode_buf,
1191 .dev_start = pcan_usb_fd_start,
1192 .dev_stop = pcan_usb_fd_stop,
1193 .dev_restart_async = pcan_usb_fd_restart_async,
1194 .dev_encode_msg = pcan_usb_fd_encode_msg,
1195
1196 .do_get_berr_counter = pcan_usb_fd_get_berr_counter,
1197 };
1198
1199 /* describes the PCAN-USB X6 adapter */
1200 static const struct can_bittiming_const pcan_usb_x6_const = {
1201 .name = "pcan_usb_x6",
1202 .tseg1_min = 1,
1203 .tseg1_max = (1 << PUCAN_TSLOW_TSGEG1_BITS),
1204 .tseg2_min = 1,
1205 .tseg2_max = (1 << PUCAN_TSLOW_TSGEG2_BITS),
1206 .sjw_max = (1 << PUCAN_TSLOW_SJW_BITS),
1207 .brp_min = 1,
1208 .brp_max = (1 << PUCAN_TSLOW_BRP_BITS),
1209 .brp_inc = 1,
1210 };
1211
1212 static const struct can_bittiming_const pcan_usb_x6_data_const = {
1213 .name = "pcan_usb_x6",
1214 .tseg1_min = 1,
1215 .tseg1_max = (1 << PUCAN_TFAST_TSGEG1_BITS),
1216 .tseg2_min = 1,
1217 .tseg2_max = (1 << PUCAN_TFAST_TSGEG2_BITS),
1218 .sjw_max = (1 << PUCAN_TFAST_SJW_BITS),
1219 .brp_min = 1,
1220 .brp_max = (1 << PUCAN_TFAST_BRP_BITS),
1221 .brp_inc = 1,
1222 };
1223
1224 const struct peak_usb_adapter pcan_usb_x6 = {
1225 .name = "PCAN-USB X6",
1226 .device_id = PCAN_USBX6_PRODUCT_ID,
1227 .ctrl_count = PCAN_USBPROFD_CHANNEL_COUNT,
1228 .ctrlmode_supported = CAN_CTRLMODE_FD |
1229 CAN_CTRLMODE_3_SAMPLES | CAN_CTRLMODE_LISTENONLY,
1230 .clock = {
1231 .freq = PCAN_UFD_CRYSTAL_HZ,
1232 },
1233 .bittiming_const = &pcan_usb_x6_const,
1234 .data_bittiming_const = &pcan_usb_x6_data_const,
1235
1236 /* size of device private data */
1237 .sizeof_dev_private = sizeof(struct pcan_usb_fd_device),
1238
1239 /* timestamps usage */
1240 .ts_used_bits = 32,
1241 .ts_period = 1000000, /* calibration period in ts. */
1242 .us_per_ts_scale = 1, /* us = (ts * scale) >> shift */
1243 .us_per_ts_shift = 0,
1244
1245 /* give here messages in/out endpoints */
1246 .ep_msg_in = PCAN_USBPRO_EP_MSGIN,
1247 .ep_msg_out = {PCAN_USBPRO_EP_MSGOUT_0, PCAN_USBPRO_EP_MSGOUT_1},
1248
1249 /* size of rx/tx usb buffers */
1250 .rx_buffer_size = PCAN_UFD_RX_BUFFER_SIZE,
1251 .tx_buffer_size = PCAN_UFD_TX_BUFFER_SIZE,
1252
1253 /* device callbacks */
1254 .intf_probe = pcan_usb_pro_probe, /* same as PCAN-USB Pro */
1255 .dev_init = pcan_usb_fd_init,
1256
1257 .dev_exit = pcan_usb_fd_exit,
1258 .dev_free = pcan_usb_fd_free,
1259 .dev_set_bus = pcan_usb_fd_set_bus,
1260 .dev_set_bittiming = pcan_usb_fd_set_bittiming_slow,
1261 .dev_set_data_bittiming = pcan_usb_fd_set_bittiming_fast,
1262 .dev_decode_buf = pcan_usb_fd_decode_buf,
1263 .dev_start = pcan_usb_fd_start,
1264 .dev_stop = pcan_usb_fd_stop,
1265 .dev_restart_async = pcan_usb_fd_restart_async,
1266 .dev_encode_msg = pcan_usb_fd_encode_msg,
1267
1268 .do_get_berr_counter = pcan_usb_fd_get_berr_counter,
1269 };
1270
