1 /*
2 * CAN driver for PEAK System PCAN-USB FD / PCAN-USB Pro FD adapter
3 *
4 * Copyright (C) 2013-2014 Stephane Grosjean <s.grosjean@peak-system.com>
5 *
6 * This program is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License as published
8 * by the Free Software Foundation; version 2 of the License.
9 *
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License for more details.
14 */
15 #include <linux/netdevice.h>
16 #include <linux/usb.h>
17 #include <linux/module.h>
18
19 #include <linux/can.h>
20 #include <linux/can/dev.h>
21 #include <linux/can/error.h>
22
23 #include "pcan_usb_core.h"
24 #include "pcan_usb_pro.h"
25 #include "pcan_ucan.h"
26
27 MODULE_SUPPORTED_DEVICE("PEAK-System PCAN-USB FD adapter");
28 MODULE_SUPPORTED_DEVICE("PEAK-System PCAN-USB Pro FD adapter");
29
30 #define PCAN_USBPROFD_CHANNEL_COUNT 2
31 #define PCAN_USBFD_CHANNEL_COUNT 1
32
33 /* PCAN-USB Pro FD adapter internal clock (Hz) */
34 #define PCAN_UFD_CRYSTAL_HZ 80000000
35
36 #define PCAN_UFD_CMD_BUFFER_SIZE 512
37 #define PCAN_UFD_LOSPD_PKT_SIZE 64
38
39 /* PCAN-USB Pro FD command timeout (ms.) */
40 #define PCAN_UFD_CMD_TIMEOUT_MS 1000
41
42 /* PCAN-USB Pro FD rx/tx buffers size */
43 #define PCAN_UFD_RX_BUFFER_SIZE 2048
44 #define PCAN_UFD_TX_BUFFER_SIZE 512
45
46 /* read some versions info from the hw devcie */
47 struct __packed pcan_ufd_fw_info {
48 __le16 size_of; /* sizeof this */
49 __le16 type; /* type of this structure */
50 u8 hw_type; /* Type of hardware (HW_TYPE_xxx) */
51 u8 bl_version[3]; /* Bootloader version */
52 u8 hw_version; /* Hardware version (PCB) */
53 u8 fw_version[3]; /* Firmware version */
54 __le32 dev_id[2]; /* "device id" per CAN */
55 __le32 ser_no; /* S/N */
56 __le32 flags; /* special functions */
57 };
58
59 /* handle device specific info used by the netdevices */
60 struct pcan_usb_fd_if {
61 struct peak_usb_device *dev[PCAN_USB_MAX_CHANNEL];
62 struct pcan_ufd_fw_info fw_info;
63 struct peak_time_ref time_ref;
64 int cm_ignore_count;
65 int dev_opened_count;
66 };
67
68 /* device information */
69 struct pcan_usb_fd_device {
70 struct peak_usb_device dev;
71 struct can_berr_counter bec;
72 struct pcan_usb_fd_if *usb_if;
73 u8 *cmd_buffer_addr;
74 };
75
76 /* Extended USB commands (non uCAN commands) */
77
78 /* Clock Modes command */
79 #define PCAN_UFD_CMD_CLK_SET 0x80
80
81 #define PCAN_UFD_CLK_80MHZ 0x0
82 #define PCAN_UFD_CLK_60MHZ 0x1
83 #define PCAN_UFD_CLK_40MHZ 0x2
84 #define PCAN_UFD_CLK_30MHZ 0x3
85 #define PCAN_UFD_CLK_24MHZ 0x4
86 #define PCAN_UFD_CLK_20MHZ 0x5
87 #define PCAN_UFD_CLK_DEF PCAN_UFD_CLK_80MHZ
88
89 struct __packed pcan_ufd_clock {
90 __le16 opcode_channel;
91
92 u8 mode;
93 u8 unused[5];
94 };
95
96 /* LED control command */
97 #define PCAN_UFD_CMD_LED_SET 0x86
98
99 #define PCAN_UFD_LED_DEV 0x00
100 #define PCAN_UFD_LED_FAST 0x01
101 #define PCAN_UFD_LED_SLOW 0x02
102 #define PCAN_UFD_LED_ON 0x03
103 #define PCAN_UFD_LED_OFF 0x04
104 #define PCAN_UFD_LED_DEF PCAN_UFD_LED_DEV
105
106 struct __packed pcan_ufd_led {
107 __le16 opcode_channel;
108
109 u8 mode;
110 u8 unused[5];
111 };
112
113 /* Extended usage of uCAN commands CMD_xxx_xx_OPTION for PCAN-USB Pro FD */
114 #define PCAN_UFD_FLTEXT_CALIBRATION 0x8000
115
116 struct __packed pcan_ufd_options {
117 __le16 opcode_channel;
118
119 __le16 ucan_mask;
120 u16 unused;
121 __le16 usb_mask;
122 };
123
124 /* Extended usage of uCAN messages for PCAN-USB Pro FD */
125 #define PCAN_UFD_MSG_CALIBRATION 0x100
126
127 struct __packed pcan_ufd_ts_msg {
128 __le16 size;
129 __le16 type;
130 __le32 ts_low;
131 __le32 ts_high;
132 __le16 usb_frame_index;
133 u16 unused;
134 };
135
136 #define PCAN_UFD_MSG_OVERRUN 0x101
137
138 #define PCAN_UFD_OVMSG_CHANNEL(o) ((o)->channel & 0xf)
139
140 struct __packed pcan_ufd_ovr_msg {
141 __le16 size;
142 __le16 type;
143 __le32 ts_low;
144 __le32 ts_high;
145 u8 channel;
146 u8 unused[3];
147 };
148
pufd_omsg_get_channel(struct pcan_ufd_ovr_msg * om)149 static inline int pufd_omsg_get_channel(struct pcan_ufd_ovr_msg *om)
150 {
151 return om->channel & 0xf;
152 }
153
154 /* Clock mode frequency values */
155 static const u32 pcan_usb_fd_clk_freq[6] = {
156 [PCAN_UFD_CLK_80MHZ] = 80000000,
157 [PCAN_UFD_CLK_60MHZ] = 60000000,
158 [PCAN_UFD_CLK_40MHZ] = 40000000,
159 [PCAN_UFD_CLK_30MHZ] = 30000000,
160 [PCAN_UFD_CLK_24MHZ] = 24000000,
161 [PCAN_UFD_CLK_20MHZ] = 20000000
162 };
163
164 /* return a device USB interface */
165 static inline
pcan_usb_fd_dev_if(struct peak_usb_device * dev)166 struct pcan_usb_fd_if *pcan_usb_fd_dev_if(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->usb_if;
171 }
172
173 /* return a device USB commands buffer */
pcan_usb_fd_cmd_buffer(struct peak_usb_device * dev)174 static inline void *pcan_usb_fd_cmd_buffer(struct peak_usb_device *dev)
175 {
176 struct pcan_usb_fd_device *pdev =
177 container_of(dev, struct pcan_usb_fd_device, dev);
178 return pdev->cmd_buffer_addr;
179 }
180
181 /* send PCAN-USB Pro FD commands synchronously */
pcan_usb_fd_send_cmd(struct peak_usb_device * dev,void * cmd_tail)182 static int pcan_usb_fd_send_cmd(struct peak_usb_device *dev, void *cmd_tail)
183 {
184 void *cmd_head = pcan_usb_fd_cmd_buffer(dev);
185 int err = 0;
186 u8 *packet_ptr;
187 int packet_len;
188 ptrdiff_t cmd_len;
189
190 /* usb device unregistered? */
191 if (!(dev->state & PCAN_USB_STATE_CONNECTED))
192 return 0;
193
194 /* if a packet is not filled completely by commands, the command list
195 * is terminated with an "end of collection" record.
196 */
197 cmd_len = cmd_tail - cmd_head;
198 if (cmd_len <= (PCAN_UFD_CMD_BUFFER_SIZE - sizeof(u64))) {
199 memset(cmd_tail, 0xff, sizeof(u64));
200 cmd_len += sizeof(u64);
201 }
202
203 packet_ptr = cmd_head;
204 packet_len = cmd_len;
205
206 /* firmware is not able to re-assemble 512 bytes buffer in full-speed */
207 if (unlikely(dev->udev->speed != USB_SPEED_HIGH))
208 packet_len = min(packet_len, PCAN_UFD_LOSPD_PKT_SIZE);
209
210 do {
211 err = usb_bulk_msg(dev->udev,
212 usb_sndbulkpipe(dev->udev,
213 PCAN_USBPRO_EP_CMDOUT),
214 packet_ptr, packet_len,
215 NULL, PCAN_UFD_CMD_TIMEOUT_MS);
216 if (err) {
217 netdev_err(dev->netdev,
218 "sending command failure: %d\n", err);
219 break;
220 }
221
222 packet_ptr += packet_len;
223 cmd_len -= packet_len;
224
225 if (cmd_len < PCAN_UFD_LOSPD_PKT_SIZE)
226 packet_len = cmd_len;
227
228 } while (packet_len > 0);
229
230 return err;
231 }
232
233 /* 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)234 static int pcan_usb_fd_build_restart_cmd(struct peak_usb_device *dev, u8 *buf)
235 {
236 struct pucan_wr_err_cnt *prc;
237 struct pucan_command *cmd;
238 u8 *pc = buf;
239
240 /* 1st, reset error counters: */
241 prc = (struct pucan_wr_err_cnt *)pc;
242 prc->opcode_channel = pucan_cmd_opcode_channel(dev,
243 PUCAN_CMD_WR_ERR_CNT);
244
245 /* select both counters */
246 prc->sel_mask = cpu_to_le16(PUCAN_WRERRCNT_TE|PUCAN_WRERRCNT_RE);
247
248 /* and reset their values */
249 prc->tx_counter = 0;
250 prc->rx_counter = 0;
251
252 /* moves the pointer forward */
253 pc += sizeof(struct pucan_wr_err_cnt);
254
255 /* add command to switch from ISO to non-ISO mode, if fw allows it */
256 if (dev->can.ctrlmode_supported & CAN_CTRLMODE_FD_NON_ISO) {
257 struct pucan_options *puo = (struct pucan_options *)pc;
258
259 puo->opcode_channel =
260 (dev->can.ctrlmode & CAN_CTRLMODE_FD_NON_ISO) ?
261 pucan_cmd_opcode_channel(dev,
262 PUCAN_CMD_CLR_DIS_OPTION) :
263 pucan_cmd_opcode_channel(dev, PUCAN_CMD_SET_EN_OPTION);
264
265 puo->options = cpu_to_le16(PUCAN_OPTION_CANDFDISO);
266
267 /* to be sure that no other extended bits will be taken into
268 * account
269 */
270 puo->unused = 0;
271
272 /* moves the pointer forward */
273 pc += sizeof(struct pucan_options);
274 }
275
276 /* next, go back to operational mode */
277 cmd = (struct pucan_command *)pc;
278 cmd->opcode_channel = pucan_cmd_opcode_channel(dev,
279 (dev->can.ctrlmode & CAN_CTRLMODE_LISTENONLY) ?
280 PUCAN_CMD_LISTEN_ONLY_MODE :
281 PUCAN_CMD_NORMAL_MODE);
282 pc += sizeof(struct pucan_command);
283
284 return pc - buf;
285 }
286
287 /* set CAN bus on/off */
pcan_usb_fd_set_bus(struct peak_usb_device * dev,u8 onoff)288 static int pcan_usb_fd_set_bus(struct peak_usb_device *dev, u8 onoff)
289 {
290 u8 *pc = pcan_usb_fd_cmd_buffer(dev);
291 int l;
292
293 if (onoff) {
294 /* build the cmds list to enter operational mode */
295 l = pcan_usb_fd_build_restart_cmd(dev, pc);
296 } else {
297 struct pucan_command *cmd = (struct pucan_command *)pc;
298
299 /* build cmd to go back to reset mode */
300 cmd->opcode_channel = pucan_cmd_opcode_channel(dev,
301 PUCAN_CMD_RESET_MODE);
302 l = sizeof(struct pucan_command);
303 }
304
305 /* send the command */
306 return pcan_usb_fd_send_cmd(dev, pc + l);
307 }
308
309 /* set filtering masks:
310 *
311 * idx in range [0..63] selects a row #idx, all rows otherwise
312 * mask in range [0..0xffffffff] defines up to 32 CANIDs in the row(s)
313 *
314 * Each bit of this 64 x 32 bits array defines a CANID value:
315 *
316 * bit[i,j] = 1 implies that CANID=(i x 32)+j will be received, while
317 * bit[i,j] = 0 implies that CANID=(i x 32)+j will be discarded.
318 */
pcan_usb_fd_set_filter_std(struct peak_usb_device * dev,int idx,u32 mask)319 static int pcan_usb_fd_set_filter_std(struct peak_usb_device *dev, int idx,
320 u32 mask)
321 {
322 struct pucan_filter_std *cmd = pcan_usb_fd_cmd_buffer(dev);
323 int i, n;
324
325 /* select all rows when idx is out of range [0..63] */
326 if ((idx < 0) || (idx >= (1 << PUCAN_FLTSTD_ROW_IDX_BITS))) {
327 n = 1 << PUCAN_FLTSTD_ROW_IDX_BITS;
328 idx = 0;
329
330 /* select the row (and only the row) otherwise */
331 } else {
332 n = idx + 1;
333 }
334
335 for (i = idx; i < n; i++, cmd++) {
336 cmd->opcode_channel = pucan_cmd_opcode_channel(dev,
337 PUCAN_CMD_FILTER_STD);
338 cmd->idx = cpu_to_le16(i);
339 cmd->mask = cpu_to_le32(mask);
340 }
341
342 /* send the command */
343 return pcan_usb_fd_send_cmd(dev, cmd);
344 }
345
346 /* set/unset options
347 *
348 * onoff set(1)/unset(0) options
349 * mask each bit defines a kind of options to set/unset
350 */
pcan_usb_fd_set_options(struct peak_usb_device * dev,bool onoff,u16 ucan_mask,u16 usb_mask)351 static int pcan_usb_fd_set_options(struct peak_usb_device *dev,
352 bool onoff, u16 ucan_mask, u16 usb_mask)
353 {
354 struct pcan_ufd_options *cmd = pcan_usb_fd_cmd_buffer(dev);
355
356 cmd->opcode_channel = pucan_cmd_opcode_channel(dev,
357 (onoff) ? PUCAN_CMD_SET_EN_OPTION :
358 PUCAN_CMD_CLR_DIS_OPTION);
359
360 cmd->ucan_mask = cpu_to_le16(ucan_mask);
361 cmd->usb_mask = cpu_to_le16(usb_mask);
362
363 /* send the command */
364 return pcan_usb_fd_send_cmd(dev, ++cmd);
365 }
366
367 /* setup LED control */
pcan_usb_fd_set_can_led(struct peak_usb_device * dev,u8 led_mode)368 static int pcan_usb_fd_set_can_led(struct peak_usb_device *dev, u8 led_mode)
369 {
370 struct pcan_ufd_led *cmd = pcan_usb_fd_cmd_buffer(dev);
371
372 cmd->opcode_channel = pucan_cmd_opcode_channel(dev,
373 PCAN_UFD_CMD_LED_SET);
374 cmd->mode = led_mode;
375
376 /* send the command */
377 return pcan_usb_fd_send_cmd(dev, ++cmd);
378 }
379
380 /* set CAN clock domain */
pcan_usb_fd_set_clock_domain(struct peak_usb_device * dev,u8 clk_mode)381 static int pcan_usb_fd_set_clock_domain(struct peak_usb_device *dev,
382 u8 clk_mode)
383 {
384 struct pcan_ufd_clock *cmd = pcan_usb_fd_cmd_buffer(dev);
385
386 cmd->opcode_channel = pucan_cmd_opcode_channel(dev,
387 PCAN_UFD_CMD_CLK_SET);
388 cmd->mode = clk_mode;
389
390 /* send the command */
391 return pcan_usb_fd_send_cmd(dev, ++cmd);
392 }
393
394 /* set bittiming for CAN and CAN-FD header */
pcan_usb_fd_set_bittiming_slow(struct peak_usb_device * dev,struct can_bittiming * bt)395 static int pcan_usb_fd_set_bittiming_slow(struct peak_usb_device *dev,
396 struct can_bittiming *bt)
397 {
398 struct pucan_timing_slow *cmd = pcan_usb_fd_cmd_buffer(dev);
399
400 cmd->opcode_channel = pucan_cmd_opcode_channel(dev,
401 PUCAN_CMD_TIMING_SLOW);
402 cmd->sjw_t = PUCAN_TSLOW_SJW_T(bt->sjw - 1,
403 dev->can.ctrlmode & CAN_CTRLMODE_3_SAMPLES);
404
405 cmd->tseg2 = PUCAN_TSLOW_TSEG2(bt->phase_seg2 - 1);
406 cmd->tseg1 = PUCAN_TSLOW_TSEG1(bt->prop_seg + bt->phase_seg1 - 1);
407 cmd->brp = cpu_to_le16(PUCAN_TSLOW_BRP(bt->brp - 1));
408
409 cmd->ewl = 96; /* default */
410
411 /* send the command */
412 return pcan_usb_fd_send_cmd(dev, ++cmd);
413 }
414
415 /* set CAN-FD bittiming for data */
pcan_usb_fd_set_bittiming_fast(struct peak_usb_device * dev,struct can_bittiming * bt)416 static int pcan_usb_fd_set_bittiming_fast(struct peak_usb_device *dev,
417 struct can_bittiming *bt)
418 {
419 struct pucan_timing_fast *cmd = pcan_usb_fd_cmd_buffer(dev);
420
421 cmd->opcode_channel = pucan_cmd_opcode_channel(dev,
422 PUCAN_CMD_TIMING_FAST);
423 cmd->sjw = PUCAN_TFAST_SJW(bt->sjw - 1);
424 cmd->tseg2 = PUCAN_TFAST_TSEG2(bt->phase_seg2 - 1);
425 cmd->tseg1 = PUCAN_TFAST_TSEG1(bt->prop_seg + bt->phase_seg1 - 1);
426 cmd->brp = cpu_to_le16(PUCAN_TFAST_BRP(bt->brp - 1));
427
428 /* send the command */
429 return pcan_usb_fd_send_cmd(dev, ++cmd);
430 }
431
432 /* handle restart but in asynchronously way
433 * (uses PCAN-USB Pro code to complete asynchronous request)
434 */
pcan_usb_fd_restart_async(struct peak_usb_device * dev,struct urb * urb,u8 * buf)435 static int pcan_usb_fd_restart_async(struct peak_usb_device *dev,
436 struct urb *urb, u8 *buf)
437 {
438 u8 *pc = buf;
439
440 /* build the entire cmds list in the provided buffer, to go back into
441 * operational mode.
442 */
443 pc += pcan_usb_fd_build_restart_cmd(dev, pc);
444
445 /* add EOC */
446 memset(pc, 0xff, sizeof(struct pucan_command));
447 pc += sizeof(struct pucan_command);
448
449 /* complete the URB */
450 usb_fill_bulk_urb(urb, dev->udev,
451 usb_sndbulkpipe(dev->udev, PCAN_USBPRO_EP_CMDOUT),
452 buf, pc - buf,
453 pcan_usb_pro_restart_complete, dev);
454
455 /* and submit it. */
456 return usb_submit_urb(urb, GFP_ATOMIC);
457 }
458
pcan_usb_fd_drv_loaded(struct peak_usb_device * dev,bool loaded)459 static int pcan_usb_fd_drv_loaded(struct peak_usb_device *dev, bool loaded)
460 {
461 struct pcan_usb_fd_device *pdev =
462 container_of(dev, struct pcan_usb_fd_device, dev);
463
464 pdev->cmd_buffer_addr[0] = 0;
465 pdev->cmd_buffer_addr[1] = !!loaded;
466
467 return pcan_usb_pro_send_req(dev,
468 PCAN_USBPRO_REQ_FCT,
469 PCAN_USBPRO_FCT_DRVLD,
470 pdev->cmd_buffer_addr,
471 PCAN_USBPRO_FCT_DRVLD_REQ_LEN);
472 }
473
pcan_usb_fd_decode_canmsg(struct pcan_usb_fd_if * usb_if,struct pucan_msg * rx_msg)474 static int pcan_usb_fd_decode_canmsg(struct pcan_usb_fd_if *usb_if,
475 struct pucan_msg *rx_msg)
476 {
477 struct pucan_rx_msg *rm = (struct pucan_rx_msg *)rx_msg;
478 struct peak_usb_device *dev = usb_if->dev[pucan_msg_get_channel(rm)];
479 struct net_device *netdev = dev->netdev;
480 struct canfd_frame *cfd;
481 struct sk_buff *skb;
482 const u16 rx_msg_flags = le16_to_cpu(rm->flags);
483
484 if (rx_msg_flags & PUCAN_MSG_EXT_DATA_LEN) {
485 /* CANFD frame case */
486 skb = alloc_canfd_skb(netdev, &cfd);
487 if (!skb)
488 return -ENOMEM;
489
490 if (rx_msg_flags & PUCAN_MSG_BITRATE_SWITCH)
491 cfd->flags |= CANFD_BRS;
492
493 if (rx_msg_flags & PUCAN_MSG_ERROR_STATE_IND)
494 cfd->flags |= CANFD_ESI;
495
496 cfd->len = can_dlc2len(get_canfd_dlc(pucan_msg_get_dlc(rm)));
497 } else {
498 /* CAN 2.0 frame case */
499 skb = alloc_can_skb(netdev, (struct can_frame **)&cfd);
500 if (!skb)
501 return -ENOMEM;
502
503 cfd->len = get_can_dlc(pucan_msg_get_dlc(rm));
504 }
505
506 cfd->can_id = le32_to_cpu(rm->can_id);
507
508 if (rx_msg_flags & PUCAN_MSG_EXT_ID)
509 cfd->can_id |= CAN_EFF_FLAG;
510
511 if (rx_msg_flags & PUCAN_MSG_RTR)
512 cfd->can_id |= CAN_RTR_FLAG;
513 else
514 memcpy(cfd->data, rm->d, cfd->len);
515
516 peak_usb_netif_rx(skb, &usb_if->time_ref,
517 le32_to_cpu(rm->ts_low), le32_to_cpu(rm->ts_high));
518
519 netdev->stats.rx_packets++;
520 netdev->stats.rx_bytes += cfd->len;
521
522 return 0;
523 }
524
525 /* handle uCAN status message */
pcan_usb_fd_decode_status(struct pcan_usb_fd_if * usb_if,struct pucan_msg * rx_msg)526 static int pcan_usb_fd_decode_status(struct pcan_usb_fd_if *usb_if,
527 struct pucan_msg *rx_msg)
528 {
529 struct pucan_status_msg *sm = (struct pucan_status_msg *)rx_msg;
530 struct peak_usb_device *dev = usb_if->dev[pucan_stmsg_get_channel(sm)];
531 struct pcan_usb_fd_device *pdev =
532 container_of(dev, struct pcan_usb_fd_device, dev);
533 enum can_state new_state = CAN_STATE_ERROR_ACTIVE;
534 enum can_state rx_state, tx_state;
535 struct net_device *netdev = dev->netdev;
536 struct can_frame *cf;
537 struct sk_buff *skb;
538
539 /* nothing should be sent while in BUS_OFF state */
540 if (dev->can.state == CAN_STATE_BUS_OFF)
541 return 0;
542
543 if (sm->channel_p_w_b & PUCAN_BUS_BUSOFF) {
544 new_state = CAN_STATE_BUS_OFF;
545 } else if (sm->channel_p_w_b & PUCAN_BUS_PASSIVE) {
546 new_state = CAN_STATE_ERROR_PASSIVE;
547 } else if (sm->channel_p_w_b & PUCAN_BUS_WARNING) {
548 new_state = CAN_STATE_ERROR_WARNING;
549 } else {
550 /* no error bit (so, no error skb, back to active state) */
551 dev->can.state = CAN_STATE_ERROR_ACTIVE;
552 pdev->bec.txerr = 0;
553 pdev->bec.rxerr = 0;
554 return 0;
555 }
556
557 /* state hasn't changed */
558 if (new_state == dev->can.state)
559 return 0;
560
561 /* handle bus state change */
562 tx_state = (pdev->bec.txerr >= pdev->bec.rxerr) ? new_state : 0;
563 rx_state = (pdev->bec.txerr <= pdev->bec.rxerr) ? new_state : 0;
564
565 /* allocate an skb to store the error frame */
566 skb = alloc_can_err_skb(netdev, &cf);
567 if (skb)
568 can_change_state(netdev, cf, tx_state, rx_state);
569
570 /* things must be done even in case of OOM */
571 if (new_state == CAN_STATE_BUS_OFF)
572 can_bus_off(netdev);
573
574 if (!skb)
575 return -ENOMEM;
576
577 peak_usb_netif_rx(skb, &usb_if->time_ref,
578 le32_to_cpu(sm->ts_low), le32_to_cpu(sm->ts_high));
579
580 netdev->stats.rx_packets++;
581 netdev->stats.rx_bytes += cf->can_dlc;
582
583 return 0;
584 }
585
586 /* handle uCAN error message */
pcan_usb_fd_decode_error(struct pcan_usb_fd_if * usb_if,struct pucan_msg * rx_msg)587 static int pcan_usb_fd_decode_error(struct pcan_usb_fd_if *usb_if,
588 struct pucan_msg *rx_msg)
589 {
590 struct pucan_error_msg *er = (struct pucan_error_msg *)rx_msg;
591 struct peak_usb_device *dev = usb_if->dev[pucan_ermsg_get_channel(er)];
592 struct pcan_usb_fd_device *pdev =
593 container_of(dev, struct pcan_usb_fd_device, dev);
594
595 /* keep a trace of tx and rx error counters for later use */
596 pdev->bec.txerr = er->tx_err_cnt;
597 pdev->bec.rxerr = er->rx_err_cnt;
598
599 return 0;
600 }
601
602 /* handle uCAN overrun message */
pcan_usb_fd_decode_overrun(struct pcan_usb_fd_if * usb_if,struct pucan_msg * rx_msg)603 static int pcan_usb_fd_decode_overrun(struct pcan_usb_fd_if *usb_if,
604 struct pucan_msg *rx_msg)
605 {
606 struct pcan_ufd_ovr_msg *ov = (struct pcan_ufd_ovr_msg *)rx_msg;
607 struct peak_usb_device *dev = usb_if->dev[pufd_omsg_get_channel(ov)];
608 struct net_device *netdev = dev->netdev;
609 struct can_frame *cf;
610 struct sk_buff *skb;
611
612 /* allocate an skb to store the error frame */
613 skb = alloc_can_err_skb(netdev, &cf);
614 if (!skb)
615 return -ENOMEM;
616
617 cf->can_id |= CAN_ERR_CRTL;
618 cf->data[1] |= CAN_ERR_CRTL_RX_OVERFLOW;
619
620 peak_usb_netif_rx(skb, &usb_if->time_ref,
621 le32_to_cpu(ov->ts_low), le32_to_cpu(ov->ts_high));
622
623 netdev->stats.rx_over_errors++;
624 netdev->stats.rx_errors++;
625
626 return 0;
627 }
628
629 /* handle USB calibration message */
pcan_usb_fd_decode_ts(struct pcan_usb_fd_if * usb_if,struct pucan_msg * rx_msg)630 static void pcan_usb_fd_decode_ts(struct pcan_usb_fd_if *usb_if,
631 struct pucan_msg *rx_msg)
632 {
633 struct pcan_ufd_ts_msg *ts = (struct pcan_ufd_ts_msg *)rx_msg;
634
635 /* should wait until clock is stabilized */
636 if (usb_if->cm_ignore_count > 0)
637 usb_if->cm_ignore_count--;
638 else
639 peak_usb_set_ts_now(&usb_if->time_ref, le32_to_cpu(ts->ts_low));
640 }
641
642 /* callback for bulk IN urb */
pcan_usb_fd_decode_buf(struct peak_usb_device * dev,struct urb * urb)643 static int pcan_usb_fd_decode_buf(struct peak_usb_device *dev, struct urb *urb)
644 {
645 struct pcan_usb_fd_if *usb_if = pcan_usb_fd_dev_if(dev);
646 struct net_device *netdev = dev->netdev;
647 struct pucan_msg *rx_msg;
648 u8 *msg_ptr, *msg_end;
649 int err = 0;
650
651 /* loop reading all the records from the incoming message */
652 msg_ptr = urb->transfer_buffer;
653 msg_end = urb->transfer_buffer + urb->actual_length;
654 for (; msg_ptr < msg_end;) {
655 u16 rx_msg_type, rx_msg_size;
656
657 rx_msg = (struct pucan_msg *)msg_ptr;
658 if (!rx_msg->size) {
659 /* null packet found: end of list */
660 break;
661 }
662
663 rx_msg_size = le16_to_cpu(rx_msg->size);
664 rx_msg_type = le16_to_cpu(rx_msg->type);
665
666 /* check if the record goes out of current packet */
667 if (msg_ptr + rx_msg_size > msg_end) {
668 netdev_err(netdev,
669 "got frag rec: should inc usb rx buf sze\n");
670 err = -EBADMSG;
671 break;
672 }
673
674 switch (rx_msg_type) {
675 case PUCAN_MSG_CAN_RX:
676 err = pcan_usb_fd_decode_canmsg(usb_if, rx_msg);
677 if (err < 0)
678 goto fail;
679 break;
680
681 case PCAN_UFD_MSG_CALIBRATION:
682 pcan_usb_fd_decode_ts(usb_if, rx_msg);
683 break;
684
685 case PUCAN_MSG_ERROR:
686 err = pcan_usb_fd_decode_error(usb_if, rx_msg);
687 if (err < 0)
688 goto fail;
689 break;
690
691 case PUCAN_MSG_STATUS:
692 err = pcan_usb_fd_decode_status(usb_if, rx_msg);
693 if (err < 0)
694 goto fail;
695 break;
696
697 case PCAN_UFD_MSG_OVERRUN:
698 err = pcan_usb_fd_decode_overrun(usb_if, rx_msg);
699 if (err < 0)
700 goto fail;
701 break;
702
703 default:
704 netdev_err(netdev,
705 "unhandled msg type 0x%02x (%d): ignored\n",
706 rx_msg_type, rx_msg_type);
707 break;
708 }
709
710 msg_ptr += rx_msg_size;
711 }
712
713 fail:
714 if (err)
715 pcan_dump_mem("received msg",
716 urb->transfer_buffer, urb->actual_length);
717 return err;
718 }
719
720 /* CAN/CANFD frames encoding callback */
pcan_usb_fd_encode_msg(struct peak_usb_device * dev,struct sk_buff * skb,u8 * obuf,size_t * size)721 static int pcan_usb_fd_encode_msg(struct peak_usb_device *dev,
722 struct sk_buff *skb, u8 *obuf, size_t *size)
723 {
724 struct pucan_tx_msg *tx_msg = (struct pucan_tx_msg *)obuf;
725 struct canfd_frame *cfd = (struct canfd_frame *)skb->data;
726 u16 tx_msg_size, tx_msg_flags;
727 u8 can_dlc;
728
729 tx_msg_size = ALIGN(sizeof(struct pucan_tx_msg) + cfd->len, 4);
730 tx_msg->size = cpu_to_le16(tx_msg_size);
731 tx_msg->type = cpu_to_le16(PUCAN_MSG_CAN_TX);
732
733 tx_msg_flags = 0;
734 if (cfd->can_id & CAN_EFF_FLAG) {
735 tx_msg_flags |= PUCAN_MSG_EXT_ID;
736 tx_msg->can_id = cpu_to_le32(cfd->can_id & CAN_EFF_MASK);
737 } else {
738 tx_msg->can_id = cpu_to_le32(cfd->can_id & CAN_SFF_MASK);
739 }
740
741 if (can_is_canfd_skb(skb)) {
742 /* considering a CANFD frame */
743 can_dlc = can_len2dlc(cfd->len);
744
745 tx_msg_flags |= PUCAN_MSG_EXT_DATA_LEN;
746
747 if (cfd->flags & CANFD_BRS)
748 tx_msg_flags |= PUCAN_MSG_BITRATE_SWITCH;
749
750 if (cfd->flags & CANFD_ESI)
751 tx_msg_flags |= PUCAN_MSG_ERROR_STATE_IND;
752 } else {
753 /* CAND 2.0 frames */
754 can_dlc = cfd->len;
755
756 if (cfd->can_id & CAN_RTR_FLAG)
757 tx_msg_flags |= PUCAN_MSG_RTR;
758 }
759
760 tx_msg->flags = cpu_to_le16(tx_msg_flags);
761 tx_msg->channel_dlc = PUCAN_MSG_CHANNEL_DLC(dev->ctrl_idx, can_dlc);
762 memcpy(tx_msg->d, cfd->data, cfd->len);
763
764 /* add null size message to tag the end (messages are 32-bits aligned)
765 */
766 tx_msg = (struct pucan_tx_msg *)(obuf + tx_msg_size);
767
768 tx_msg->size = 0;
769
770 /* set the whole size of the USB packet to send */
771 *size = tx_msg_size + sizeof(u32);
772
773 return 0;
774 }
775
776 /* start the interface (last chance before set bus on) */
pcan_usb_fd_start(struct peak_usb_device * dev)777 static int pcan_usb_fd_start(struct peak_usb_device *dev)
778 {
779 struct pcan_usb_fd_device *pdev =
780 container_of(dev, struct pcan_usb_fd_device, dev);
781 int err;
782
783 /* set filter mode: all acceptance */
784 err = pcan_usb_fd_set_filter_std(dev, -1, 0xffffffff);
785 if (err)
786 return err;
787
788 /* opening first device: */
789 if (pdev->usb_if->dev_opened_count == 0) {
790 /* reset time_ref */
791 peak_usb_init_time_ref(&pdev->usb_if->time_ref,
792 &pcan_usb_pro_fd);
793
794 /* enable USB calibration messages */
795 err = pcan_usb_fd_set_options(dev, 1,
796 PUCAN_OPTION_ERROR,
797 PCAN_UFD_FLTEXT_CALIBRATION);
798 }
799
800 pdev->usb_if->dev_opened_count++;
801
802 /* reset cached error counters */
803 pdev->bec.txerr = 0;
804 pdev->bec.rxerr = 0;
805
806 return err;
807 }
808
809 /* 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)810 static int pcan_usb_fd_get_berr_counter(const struct net_device *netdev,
811 struct can_berr_counter *bec)
812 {
813 struct peak_usb_device *dev = netdev_priv(netdev);
814 struct pcan_usb_fd_device *pdev =
815 container_of(dev, struct pcan_usb_fd_device, dev);
816
817 *bec = pdev->bec;
818
819 /* must return 0 */
820 return 0;
821 }
822
823 /* stop interface (last chance before set bus off) */
pcan_usb_fd_stop(struct peak_usb_device * dev)824 static int pcan_usb_fd_stop(struct peak_usb_device *dev)
825 {
826 struct pcan_usb_fd_device *pdev =
827 container_of(dev, struct pcan_usb_fd_device, dev);
828
829 /* turn off special msgs for that interface if no other dev opened */
830 if (pdev->usb_if->dev_opened_count == 1)
831 pcan_usb_fd_set_options(dev, 0,
832 PUCAN_OPTION_ERROR,
833 PCAN_UFD_FLTEXT_CALIBRATION);
834 pdev->usb_if->dev_opened_count--;
835
836 return 0;
837 }
838
839 /* called when probing, to initialize a device object */
pcan_usb_fd_init(struct peak_usb_device * dev)840 static int pcan_usb_fd_init(struct peak_usb_device *dev)
841 {
842 struct pcan_usb_fd_device *pdev =
843 container_of(dev, struct pcan_usb_fd_device, dev);
844 int i, err = -ENOMEM;
845
846 /* do this for 1st channel only */
847 if (!dev->prev_siblings) {
848 /* allocate netdevices common structure attached to first one */
849 pdev->usb_if = kzalloc(sizeof(*pdev->usb_if), GFP_KERNEL);
850 if (!pdev->usb_if)
851 goto err_out;
852
853 /* allocate command buffer once for all for the interface */
854 pdev->cmd_buffer_addr = kmalloc(PCAN_UFD_CMD_BUFFER_SIZE,
855 GFP_KERNEL);
856 if (!pdev->cmd_buffer_addr)
857 goto err_out_1;
858
859 /* number of ts msgs to ignore before taking one into account */
860 pdev->usb_if->cm_ignore_count = 5;
861
862 err = pcan_usb_pro_send_req(dev, PCAN_USBPRO_REQ_INFO,
863 PCAN_USBPRO_INFO_FW,
864 &pdev->usb_if->fw_info,
865 sizeof(pdev->usb_if->fw_info));
866 if (err) {
867 dev_err(dev->netdev->dev.parent,
868 "unable to read %s firmware info (err %d)\n",
869 dev->adapter->name, err);
870 goto err_out_2;
871 }
872
873 /* explicit use of dev_xxx() instead of netdev_xxx() here:
874 * information displayed are related to the device itself, not
875 * to the canx (channel) device.
876 */
877 dev_info(dev->netdev->dev.parent,
878 "PEAK-System %s v%u fw v%u.%u.%u (%u channels)\n",
879 dev->adapter->name, pdev->usb_if->fw_info.hw_version,
880 pdev->usb_if->fw_info.fw_version[0],
881 pdev->usb_if->fw_info.fw_version[1],
882 pdev->usb_if->fw_info.fw_version[2],
883 dev->adapter->ctrl_count);
884
885 /* check for ability to switch between ISO/non-ISO modes */
886 if (pdev->usb_if->fw_info.fw_version[0] >= 2) {
887 /* firmware >= 2.x supports ISO/non-ISO switching */
888 dev->can.ctrlmode_supported |= CAN_CTRLMODE_FD_NON_ISO;
889 } else {
890 /* firmware < 2.x only supports fixed(!) non-ISO */
891 dev->can.ctrlmode |= CAN_CTRLMODE_FD_NON_ISO;
892 }
893
894 /* tell the hardware the can driver is running */
895 err = pcan_usb_fd_drv_loaded(dev, 1);
896 if (err) {
897 dev_err(dev->netdev->dev.parent,
898 "unable to tell %s driver is loaded (err %d)\n",
899 dev->adapter->name, err);
900 goto err_out_2;
901 }
902 } else {
903 /* otherwise, simply copy previous sibling's values */
904 struct pcan_usb_fd_device *ppdev =
905 container_of(dev->prev_siblings,
906 struct pcan_usb_fd_device, dev);
907
908 pdev->usb_if = ppdev->usb_if;
909 pdev->cmd_buffer_addr = ppdev->cmd_buffer_addr;
910
911 /* do a copy of the ctrlmode[_supported] too */
912 dev->can.ctrlmode = ppdev->dev.can.ctrlmode;
913 dev->can.ctrlmode_supported = ppdev->dev.can.ctrlmode_supported;
914 }
915
916 pdev->usb_if->dev[dev->ctrl_idx] = dev;
917 dev->device_number =
918 le32_to_cpu(pdev->usb_if->fw_info.dev_id[dev->ctrl_idx]);
919
920 /* set clock domain */
921 for (i = 0; i < ARRAY_SIZE(pcan_usb_fd_clk_freq); i++)
922 if (dev->adapter->clock.freq == pcan_usb_fd_clk_freq[i])
923 break;
924
925 if (i >= ARRAY_SIZE(pcan_usb_fd_clk_freq)) {
926 dev_warn(dev->netdev->dev.parent,
927 "incompatible clock frequencies\n");
928 err = -EINVAL;
929 goto err_out_2;
930 }
931
932 pcan_usb_fd_set_clock_domain(dev, i);
933
934 /* set LED in default state (end of init phase) */
935 pcan_usb_fd_set_can_led(dev, PCAN_UFD_LED_DEF);
936
937 return 0;
938
939 err_out_2:
940 kfree(pdev->cmd_buffer_addr);
941 err_out_1:
942 kfree(pdev->usb_if);
943 err_out:
944 return err;
945 }
946
947 /* called when driver module is being unloaded */
pcan_usb_fd_exit(struct peak_usb_device * dev)948 static void pcan_usb_fd_exit(struct peak_usb_device *dev)
949 {
950 struct pcan_usb_fd_device *pdev =
951 container_of(dev, struct pcan_usb_fd_device, dev);
952
953 /* when rmmod called before unplug and if down, should reset things
954 * before leaving
955 */
956 if (dev->can.state != CAN_STATE_STOPPED) {
957 /* set bus off on the corresponding channel */
958 pcan_usb_fd_set_bus(dev, 0);
959 }
960
961 /* switch off corresponding CAN LEDs */
962 pcan_usb_fd_set_can_led(dev, PCAN_UFD_LED_OFF);
963
964 /* if channel #0 (only) */
965 if (dev->ctrl_idx == 0) {
966 /* turn off calibration message if any device were opened */
967 if (pdev->usb_if->dev_opened_count > 0)
968 pcan_usb_fd_set_options(dev, 0,
969 PUCAN_OPTION_ERROR,
970 PCAN_UFD_FLTEXT_CALIBRATION);
971
972 /* tell USB adapter that the driver is being unloaded */
973 pcan_usb_fd_drv_loaded(dev, 0);
974 }
975 }
976
977 /* called when the USB adapter is unplugged */
pcan_usb_fd_free(struct peak_usb_device * dev)978 static void pcan_usb_fd_free(struct peak_usb_device *dev)
979 {
980 /* last device: can free shared objects now */
981 if (!dev->prev_siblings && !dev->next_siblings) {
982 struct pcan_usb_fd_device *pdev =
983 container_of(dev, struct pcan_usb_fd_device, dev);
984
985 /* free commands buffer */
986 kfree(pdev->cmd_buffer_addr);
987
988 /* free usb interface object */
989 kfree(pdev->usb_if);
990 }
991 }
992
993 /* describes the PCAN-USB FD adapter */
994 static const struct can_bittiming_const pcan_usb_fd_const = {
995 .name = "pcan_usb_fd",
996 .tseg1_min = 1,
997 .tseg1_max = (1 << PUCAN_TSLOW_TSGEG1_BITS),
998 .tseg2_min = 1,
999 .tseg2_max = (1 << PUCAN_TSLOW_TSGEG2_BITS),
1000 .sjw_max = (1 << PUCAN_TSLOW_SJW_BITS),
1001 .brp_min = 1,
1002 .brp_max = (1 << PUCAN_TSLOW_BRP_BITS),
1003 .brp_inc = 1,
1004 };
1005
1006 static const struct can_bittiming_const pcan_usb_fd_data_const = {
1007 .name = "pcan_usb_fd",
1008 .tseg1_min = 1,
1009 .tseg1_max = (1 << PUCAN_TFAST_TSGEG1_BITS),
1010 .tseg2_min = 1,
1011 .tseg2_max = (1 << PUCAN_TFAST_TSGEG2_BITS),
1012 .sjw_max = (1 << PUCAN_TFAST_SJW_BITS),
1013 .brp_min = 1,
1014 .brp_max = (1 << PUCAN_TFAST_BRP_BITS),
1015 .brp_inc = 1,
1016 };
1017
1018 const struct peak_usb_adapter pcan_usb_fd = {
1019 .name = "PCAN-USB FD",
1020 .device_id = PCAN_USBFD_PRODUCT_ID,
1021 .ctrl_count = PCAN_USBFD_CHANNEL_COUNT,
1022 .ctrlmode_supported = CAN_CTRLMODE_FD |
1023 CAN_CTRLMODE_3_SAMPLES | CAN_CTRLMODE_LISTENONLY,
1024 .clock = {
1025 .freq = PCAN_UFD_CRYSTAL_HZ,
1026 },
1027 .bittiming_const = &pcan_usb_fd_const,
1028 .data_bittiming_const = &pcan_usb_fd_data_const,
1029
1030 /* size of device private data */
1031 .sizeof_dev_private = sizeof(struct pcan_usb_fd_device),
1032
1033 /* timestamps usage */
1034 .ts_used_bits = 32,
1035 .ts_period = 1000000, /* calibration period in ts. */
1036 .us_per_ts_scale = 1, /* us = (ts * scale) >> shift */
1037 .us_per_ts_shift = 0,
1038
1039 /* give here messages in/out endpoints */
1040 .ep_msg_in = PCAN_USBPRO_EP_MSGIN,
1041 .ep_msg_out = {PCAN_USBPRO_EP_MSGOUT_0},
1042
1043 /* size of rx/tx usb buffers */
1044 .rx_buffer_size = PCAN_UFD_RX_BUFFER_SIZE,
1045 .tx_buffer_size = PCAN_UFD_TX_BUFFER_SIZE,
1046
1047 /* device callbacks */
1048 .intf_probe = pcan_usb_pro_probe, /* same as PCAN-USB Pro */
1049 .dev_init = pcan_usb_fd_init,
1050
1051 .dev_exit = pcan_usb_fd_exit,
1052 .dev_free = pcan_usb_fd_free,
1053 .dev_set_bus = pcan_usb_fd_set_bus,
1054 .dev_set_bittiming = pcan_usb_fd_set_bittiming_slow,
1055 .dev_set_data_bittiming = pcan_usb_fd_set_bittiming_fast,
1056 .dev_decode_buf = pcan_usb_fd_decode_buf,
1057 .dev_start = pcan_usb_fd_start,
1058 .dev_stop = pcan_usb_fd_stop,
1059 .dev_restart_async = pcan_usb_fd_restart_async,
1060 .dev_encode_msg = pcan_usb_fd_encode_msg,
1061
1062 .do_get_berr_counter = pcan_usb_fd_get_berr_counter,
1063 };
1064
1065 /* describes the PCAN-USB Pro FD adapter */
1066 static const struct can_bittiming_const pcan_usb_pro_fd_const = {
1067 .name = "pcan_usb_pro_fd",
1068 .tseg1_min = 1,
1069 .tseg1_max = (1 << PUCAN_TSLOW_TSGEG1_BITS),
1070 .tseg2_min = 1,
1071 .tseg2_max = (1 << PUCAN_TSLOW_TSGEG2_BITS),
1072 .sjw_max = (1 << PUCAN_TSLOW_SJW_BITS),
1073 .brp_min = 1,
1074 .brp_max = (1 << PUCAN_TSLOW_BRP_BITS),
1075 .brp_inc = 1,
1076 };
1077
1078 static const struct can_bittiming_const pcan_usb_pro_fd_data_const = {
1079 .name = "pcan_usb_pro_fd",
1080 .tseg1_min = 1,
1081 .tseg1_max = (1 << PUCAN_TFAST_TSGEG1_BITS),
1082 .tseg2_min = 1,
1083 .tseg2_max = (1 << PUCAN_TFAST_TSGEG2_BITS),
1084 .sjw_max = (1 << PUCAN_TFAST_SJW_BITS),
1085 .brp_min = 1,
1086 .brp_max = (1 << PUCAN_TFAST_BRP_BITS),
1087 .brp_inc = 1,
1088 };
1089
1090 const struct peak_usb_adapter pcan_usb_pro_fd = {
1091 .name = "PCAN-USB Pro FD",
1092 .device_id = PCAN_USBPROFD_PRODUCT_ID,
1093 .ctrl_count = PCAN_USBPROFD_CHANNEL_COUNT,
1094 .ctrlmode_supported = CAN_CTRLMODE_FD |
1095 CAN_CTRLMODE_3_SAMPLES | CAN_CTRLMODE_LISTENONLY,
1096 .clock = {
1097 .freq = PCAN_UFD_CRYSTAL_HZ,
1098 },
1099 .bittiming_const = &pcan_usb_pro_fd_const,
1100 .data_bittiming_const = &pcan_usb_pro_fd_data_const,
1101
1102 /* size of device private data */
1103 .sizeof_dev_private = sizeof(struct pcan_usb_fd_device),
1104
1105 /* timestamps usage */
1106 .ts_used_bits = 32,
1107 .ts_period = 1000000, /* calibration period in ts. */
1108 .us_per_ts_scale = 1, /* us = (ts * scale) >> shift */
1109 .us_per_ts_shift = 0,
1110
1111 /* give here messages in/out endpoints */
1112 .ep_msg_in = PCAN_USBPRO_EP_MSGIN,
1113 .ep_msg_out = {PCAN_USBPRO_EP_MSGOUT_0, PCAN_USBPRO_EP_MSGOUT_1},
1114
1115 /* size of rx/tx usb buffers */
1116 .rx_buffer_size = PCAN_UFD_RX_BUFFER_SIZE,
1117 .tx_buffer_size = PCAN_UFD_TX_BUFFER_SIZE,
1118
1119 /* device callbacks */
1120 .intf_probe = pcan_usb_pro_probe, /* same as PCAN-USB Pro */
1121 .dev_init = pcan_usb_fd_init,
1122
1123 .dev_exit = pcan_usb_fd_exit,
1124 .dev_free = pcan_usb_fd_free,
1125 .dev_set_bus = pcan_usb_fd_set_bus,
1126 .dev_set_bittiming = pcan_usb_fd_set_bittiming_slow,
1127 .dev_set_data_bittiming = pcan_usb_fd_set_bittiming_fast,
1128 .dev_decode_buf = pcan_usb_fd_decode_buf,
1129 .dev_start = pcan_usb_fd_start,
1130 .dev_stop = pcan_usb_fd_stop,
1131 .dev_restart_async = pcan_usb_fd_restart_async,
1132 .dev_encode_msg = pcan_usb_fd_encode_msg,
1133
1134 .do_get_berr_counter = pcan_usb_fd_get_berr_counter,
1135 };
1136
1137 /* describes the PCAN-USB X6 adapter */
1138 static const struct can_bittiming_const pcan_usb_x6_const = {
1139 .name = "pcan_usb_x6",
1140 .tseg1_min = 1,
1141 .tseg1_max = (1 << PUCAN_TSLOW_TSGEG1_BITS),
1142 .tseg2_min = 1,
1143 .tseg2_max = (1 << PUCAN_TSLOW_TSGEG2_BITS),
1144 .sjw_max = (1 << PUCAN_TSLOW_SJW_BITS),
1145 .brp_min = 1,
1146 .brp_max = (1 << PUCAN_TSLOW_BRP_BITS),
1147 .brp_inc = 1,
1148 };
1149
1150 static const struct can_bittiming_const pcan_usb_x6_data_const = {
1151 .name = "pcan_usb_x6",
1152 .tseg1_min = 1,
1153 .tseg1_max = (1 << PUCAN_TFAST_TSGEG1_BITS),
1154 .tseg2_min = 1,
1155 .tseg2_max = (1 << PUCAN_TFAST_TSGEG2_BITS),
1156 .sjw_max = (1 << PUCAN_TFAST_SJW_BITS),
1157 .brp_min = 1,
1158 .brp_max = (1 << PUCAN_TFAST_BRP_BITS),
1159 .brp_inc = 1,
1160 };
1161
1162 const struct peak_usb_adapter pcan_usb_x6 = {
1163 .name = "PCAN-USB X6",
1164 .device_id = PCAN_USBX6_PRODUCT_ID,
1165 .ctrl_count = PCAN_USBPROFD_CHANNEL_COUNT,
1166 .ctrlmode_supported = CAN_CTRLMODE_FD |
1167 CAN_CTRLMODE_3_SAMPLES | CAN_CTRLMODE_LISTENONLY,
1168 .clock = {
1169 .freq = PCAN_UFD_CRYSTAL_HZ,
1170 },
1171 .bittiming_const = &pcan_usb_x6_const,
1172 .data_bittiming_const = &pcan_usb_x6_data_const,
1173
1174 /* size of device private data */
1175 .sizeof_dev_private = sizeof(struct pcan_usb_fd_device),
1176
1177 /* timestamps usage */
1178 .ts_used_bits = 32,
1179 .ts_period = 1000000, /* calibration period in ts. */
1180 .us_per_ts_scale = 1, /* us = (ts * scale) >> shift */
1181 .us_per_ts_shift = 0,
1182
1183 /* give here messages in/out endpoints */
1184 .ep_msg_in = PCAN_USBPRO_EP_MSGIN,
1185 .ep_msg_out = {PCAN_USBPRO_EP_MSGOUT_0, PCAN_USBPRO_EP_MSGOUT_1},
1186
1187 /* size of rx/tx usb buffers */
1188 .rx_buffer_size = PCAN_UFD_RX_BUFFER_SIZE,
1189 .tx_buffer_size = PCAN_UFD_TX_BUFFER_SIZE,
1190
1191 /* device callbacks */
1192 .intf_probe = pcan_usb_pro_probe, /* same as PCAN-USB Pro */
1193 .dev_init = pcan_usb_fd_init,
1194
1195 .dev_exit = pcan_usb_fd_exit,
1196 .dev_free = pcan_usb_fd_free,
1197 .dev_set_bus = pcan_usb_fd_set_bus,
1198 .dev_set_bittiming = pcan_usb_fd_set_bittiming_slow,
1199 .dev_set_data_bittiming = pcan_usb_fd_set_bittiming_fast,
1200 .dev_decode_buf = pcan_usb_fd_decode_buf,
1201 .dev_start = pcan_usb_fd_start,
1202 .dev_stop = pcan_usb_fd_stop,
1203 .dev_restart_async = pcan_usb_fd_restart_async,
1204 .dev_encode_msg = pcan_usb_fd_encode_msg,
1205
1206 .do_get_berr_counter = pcan_usb_fd_get_berr_counter,
1207 };
1208