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Merge tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost
[cris-mirror.git] / drivers / net / can / usb / peak_usb / pcan_usb_fd.c
blobdd161c5eea8ec7e01aaa7d4c759fe212e5d9b79d
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 #include <linux/can/dev/peak_canfd.h>
23
24 #include "pcan_usb_core.h"
25 #include "pcan_usb_pro.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
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
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 */
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 */
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 */
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->ctrl_idx,
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->ctrl_idx,
262 PUCAN_CMD_CLR_DIS_OPTION) :
263 pucan_cmd_opcode_channel(dev->ctrl_idx,
264 PUCAN_CMD_SET_EN_OPTION);
265
266 puo->options = cpu_to_le16(PUCAN_OPTION_CANDFDISO);
267
268 /* to be sure that no other extended bits will be taken into
269 * account
270 */
271 puo->unused = 0;
272
273 /* moves the pointer forward */
274 pc += sizeof(struct pucan_options);
275 }
276
277 /* next, go back to operational mode */
278 cmd = (struct pucan_command *)pc;
279 cmd->opcode_channel = pucan_cmd_opcode_channel(dev->ctrl_idx,
280 (dev->can.ctrlmode & CAN_CTRLMODE_LISTENONLY) ?
281 PUCAN_CMD_LISTEN_ONLY_MODE :
282 PUCAN_CMD_NORMAL_MODE);
283 pc += sizeof(struct pucan_command);
284
285 return pc - buf;
286 }
287
288 /* set CAN bus on/off */
289 static int pcan_usb_fd_set_bus(struct peak_usb_device *dev, u8 onoff)
290 {
291 u8 *pc = pcan_usb_fd_cmd_buffer(dev);
292 int l;
293
294 if (onoff) {
295 /* build the cmds list to enter operational mode */
296 l = pcan_usb_fd_build_restart_cmd(dev, pc);
297 } else {
298 struct pucan_command *cmd = (struct pucan_command *)pc;
299
300 /* build cmd to go back to reset mode */
301 cmd->opcode_channel = pucan_cmd_opcode_channel(dev->ctrl_idx,
302 PUCAN_CMD_RESET_MODE);
303 l = sizeof(struct pucan_command);
304 }
305
306 /* send the command */
307 return pcan_usb_fd_send_cmd(dev, pc + l);
308 }
309
310 /* set filtering masks:
311 *
312 * idx in range [0..63] selects a row #idx, all rows otherwise
313 * mask in range [0..0xffffffff] defines up to 32 CANIDs in the row(s)
314 *
315 * Each bit of this 64 x 32 bits array defines a CANID value:
316 *
317 * bit[i,j] = 1 implies that CANID=(i x 32)+j will be received, while
318 * bit[i,j] = 0 implies that CANID=(i x 32)+j will be discarded.
319 */
320 static int pcan_usb_fd_set_filter_std(struct peak_usb_device *dev, int idx,
321 u32 mask)
322 {
323 struct pucan_filter_std *cmd = pcan_usb_fd_cmd_buffer(dev);
324 int i, n;
325
326 /* select all rows when idx is out of range [0..63] */
327 if ((idx < 0) || (idx >= (1 << PUCAN_FLTSTD_ROW_IDX_BITS))) {
328 n = 1 << PUCAN_FLTSTD_ROW_IDX_BITS;
329 idx = 0;
330
331 /* select the row (and only the row) otherwise */
332 } else {
333 n = idx + 1;
334 }
335
336 for (i = idx; i < n; i++, cmd++) {
337 cmd->opcode_channel = pucan_cmd_opcode_channel(dev->ctrl_idx,
338 PUCAN_CMD_FILTER_STD);
339 cmd->idx = cpu_to_le16(i);
340 cmd->mask = cpu_to_le32(mask);
341 }
342
343 /* send the command */
344 return pcan_usb_fd_send_cmd(dev, cmd);
345 }
346
347 /* set/unset options
348 *
349 * onoff set(1)/unset(0) options
350 * mask each bit defines a kind of options to set/unset
351 */
352 static int pcan_usb_fd_set_options(struct peak_usb_device *dev,
353 bool onoff, u16 ucan_mask, u16 usb_mask)
354 {
355 struct pcan_ufd_options *cmd = pcan_usb_fd_cmd_buffer(dev);
356
357 cmd->opcode_channel = pucan_cmd_opcode_channel(dev->ctrl_idx,
358 (onoff) ? PUCAN_CMD_SET_EN_OPTION :
359 PUCAN_CMD_CLR_DIS_OPTION);
360
361 cmd->ucan_mask = cpu_to_le16(ucan_mask);
362 cmd->usb_mask = cpu_to_le16(usb_mask);
363
364 /* send the command */
365 return pcan_usb_fd_send_cmd(dev, ++cmd);
366 }
367
368 /* setup LED control */
369 static int pcan_usb_fd_set_can_led(struct peak_usb_device *dev, u8 led_mode)
370 {
371 struct pcan_ufd_led *cmd = pcan_usb_fd_cmd_buffer(dev);
372
373 cmd->opcode_channel = pucan_cmd_opcode_channel(dev->ctrl_idx,
374 PCAN_UFD_CMD_LED_SET);
375 cmd->mode = led_mode;
376
377 /* send the command */
378 return pcan_usb_fd_send_cmd(dev, ++cmd);
379 }
380
381 /* set CAN clock domain */
382 static int pcan_usb_fd_set_clock_domain(struct peak_usb_device *dev,
383 u8 clk_mode)
384 {
385 struct pcan_ufd_clock *cmd = pcan_usb_fd_cmd_buffer(dev);
386
387 cmd->opcode_channel = pucan_cmd_opcode_channel(dev->ctrl_idx,
388 PCAN_UFD_CMD_CLK_SET);
389 cmd->mode = clk_mode;
390
391 /* send the command */
392 return pcan_usb_fd_send_cmd(dev, ++cmd);
393 }
394
395 /* set bittiming for CAN and CAN-FD header */
396 static int pcan_usb_fd_set_bittiming_slow(struct peak_usb_device *dev,
397 struct can_bittiming *bt)
398 {
399 struct pucan_timing_slow *cmd = pcan_usb_fd_cmd_buffer(dev);
400
401 cmd->opcode_channel = pucan_cmd_opcode_channel(dev->ctrl_idx,
402 PUCAN_CMD_TIMING_SLOW);
403 cmd->sjw_t = PUCAN_TSLOW_SJW_T(bt->sjw - 1,
404 dev->can.ctrlmode & CAN_CTRLMODE_3_SAMPLES);
405
406 cmd->tseg2 = PUCAN_TSLOW_TSEG2(bt->phase_seg2 - 1);
407 cmd->tseg1 = PUCAN_TSLOW_TSEG1(bt->prop_seg + bt->phase_seg1 - 1);
408 cmd->brp = cpu_to_le16(PUCAN_TSLOW_BRP(bt->brp - 1));
409
410 cmd->ewl = 96; /* default */
411
412 /* send the command */
413 return pcan_usb_fd_send_cmd(dev, ++cmd);
414 }
415
416 /* set CAN-FD bittiming for data */
417 static int pcan_usb_fd_set_bittiming_fast(struct peak_usb_device *dev,
418 struct can_bittiming *bt)
419 {
420 struct pucan_timing_fast *cmd = pcan_usb_fd_cmd_buffer(dev);
421
422 cmd->opcode_channel = pucan_cmd_opcode_channel(dev->ctrl_idx,
423 PUCAN_CMD_TIMING_FAST);
424 cmd->sjw = PUCAN_TFAST_SJW(bt->sjw - 1);
425 cmd->tseg2 = PUCAN_TFAST_TSEG2(bt->phase_seg2 - 1);
426 cmd->tseg1 = PUCAN_TFAST_TSEG1(bt->prop_seg + bt->phase_seg1 - 1);
427 cmd->brp = cpu_to_le16(PUCAN_TFAST_BRP(bt->brp - 1));
428
429 /* send the command */
430 return pcan_usb_fd_send_cmd(dev, ++cmd);
431 }
432
433 /* handle restart but in asynchronously way
434 * (uses PCAN-USB Pro code to complete asynchronous request)
435 */
436 static int pcan_usb_fd_restart_async(struct peak_usb_device *dev,
437 struct urb *urb, u8 *buf)
438 {
439 u8 *pc = buf;
440
441 /* build the entire cmds list in the provided buffer, to go back into
442 * operational mode.
443 */
444 pc += pcan_usb_fd_build_restart_cmd(dev, pc);
445
446 /* add EOC */
447 memset(pc, 0xff, sizeof(struct pucan_command));
448 pc += sizeof(struct pucan_command);
449
450 /* complete the URB */
451 usb_fill_bulk_urb(urb, dev->udev,
452 usb_sndbulkpipe(dev->udev, PCAN_USBPRO_EP_CMDOUT),
453 buf, pc - buf,
454 pcan_usb_pro_restart_complete, dev);
455
456 /* and submit it. */
457 return usb_submit_urb(urb, GFP_ATOMIC);
458 }
459
460 static int pcan_usb_fd_drv_loaded(struct peak_usb_device *dev, bool loaded)
461 {
462 struct pcan_usb_fd_device *pdev =
463 container_of(dev, struct pcan_usb_fd_device, dev);
464
465 pdev->cmd_buffer_addr[0] = 0;
466 pdev->cmd_buffer_addr[1] = !!loaded;
467
468 return pcan_usb_pro_send_req(dev,
469 PCAN_USBPRO_REQ_FCT,
470 PCAN_USBPRO_FCT_DRVLD,
471 pdev->cmd_buffer_addr,
472 PCAN_USBPRO_FCT_DRVLD_REQ_LEN);
473 }
474
475 static int pcan_usb_fd_decode_canmsg(struct pcan_usb_fd_if *usb_if,
476 struct pucan_msg *rx_msg)
477 {
478 struct pucan_rx_msg *rm = (struct pucan_rx_msg *)rx_msg;
479 struct peak_usb_device *dev = usb_if->dev[pucan_msg_get_channel(rm)];
480 struct net_device *netdev = dev->netdev;
481 struct canfd_frame *cfd;
482 struct sk_buff *skb;
483 const u16 rx_msg_flags = le16_to_cpu(rm->flags);
484
485 if (rx_msg_flags & PUCAN_MSG_EXT_DATA_LEN) {
486 /* CANFD frame case */
487 skb = alloc_canfd_skb(netdev, &cfd);
488 if (!skb)
489 return -ENOMEM;
490
491 if (rx_msg_flags & PUCAN_MSG_BITRATE_SWITCH)
492 cfd->flags |= CANFD_BRS;
493
494 if (rx_msg_flags & PUCAN_MSG_ERROR_STATE_IND)
495 cfd->flags |= CANFD_ESI;
496
497 cfd->len = can_dlc2len(get_canfd_dlc(pucan_msg_get_dlc(rm)));
498 } else {
499 /* CAN 2.0 frame case */
500 skb = alloc_can_skb(netdev, (struct can_frame **)&cfd);
501 if (!skb)
502 return -ENOMEM;
503
504 cfd->len = get_can_dlc(pucan_msg_get_dlc(rm));
505 }
506
507 cfd->can_id = le32_to_cpu(rm->can_id);
508
509 if (rx_msg_flags & PUCAN_MSG_EXT_ID)
510 cfd->can_id |= CAN_EFF_FLAG;
511
512 if (rx_msg_flags & PUCAN_MSG_RTR)
513 cfd->can_id |= CAN_RTR_FLAG;
514 else
515 memcpy(cfd->data, rm->d, cfd->len);
516
517 peak_usb_netif_rx(skb, &usb_if->time_ref, le32_to_cpu(rm->ts_low));
518
519 netdev->stats.rx_packets++;
520 netdev->stats.rx_bytes += cfd->len;
521
522 return 0;
523 }
524
525 /* handle uCAN status message */
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, le32_to_cpu(sm->ts_low));
578
579 netdev->stats.rx_packets++;
580 netdev->stats.rx_bytes += cf->can_dlc;
581
582 return 0;
583 }
584
585 /* handle uCAN error message */
586 static int pcan_usb_fd_decode_error(struct pcan_usb_fd_if *usb_if,
587 struct pucan_msg *rx_msg)
588 {
589 struct pucan_error_msg *er = (struct pucan_error_msg *)rx_msg;
590 struct peak_usb_device *dev = usb_if->dev[pucan_ermsg_get_channel(er)];
591 struct pcan_usb_fd_device *pdev =
592 container_of(dev, struct pcan_usb_fd_device, dev);
593
594 /* keep a trace of tx and rx error counters for later use */
595 pdev->bec.txerr = er->tx_err_cnt;
596 pdev->bec.rxerr = er->rx_err_cnt;
597
598 return 0;
599 }
600
601 /* handle uCAN overrun message */
602 static int pcan_usb_fd_decode_overrun(struct pcan_usb_fd_if *usb_if,
603 struct pucan_msg *rx_msg)
604 {
605 struct pcan_ufd_ovr_msg *ov = (struct pcan_ufd_ovr_msg *)rx_msg;
606 struct peak_usb_device *dev = usb_if->dev[pufd_omsg_get_channel(ov)];
607 struct net_device *netdev = dev->netdev;
608 struct can_frame *cf;
609 struct sk_buff *skb;
610
611 /* allocate an skb to store the error frame */
612 skb = alloc_can_err_skb(netdev, &cf);
613 if (!skb)
614 return -ENOMEM;
615
616 cf->can_id |= CAN_ERR_CRTL;
617 cf->data[1] |= CAN_ERR_CRTL_RX_OVERFLOW;
618
619 peak_usb_netif_rx(skb, &usb_if->time_ref, le32_to_cpu(ov->ts_low));
620
621 netdev->stats.rx_over_errors++;
622 netdev->stats.rx_errors++;
623
624 return 0;
625 }
626
627 /* handle USB calibration message */
628 static void pcan_usb_fd_decode_ts(struct pcan_usb_fd_if *usb_if,
629 struct pucan_msg *rx_msg)
630 {
631 struct pcan_ufd_ts_msg *ts = (struct pcan_ufd_ts_msg *)rx_msg;
632
633 /* should wait until clock is stabilized */
634 if (usb_if->cm_ignore_count > 0)
635 usb_if->cm_ignore_count--;
636 else
637 peak_usb_set_ts_now(&usb_if->time_ref, le32_to_cpu(ts->ts_low));
638 }
639
640 /* callback for bulk IN urb */
641 static int pcan_usb_fd_decode_buf(struct peak_usb_device *dev, struct urb *urb)
642 {
643 struct pcan_usb_fd_if *usb_if = pcan_usb_fd_dev_if(dev);
644 struct net_device *netdev = dev->netdev;
645 struct pucan_msg *rx_msg;
646 u8 *msg_ptr, *msg_end;
647 int err = 0;
648
649 /* loop reading all the records from the incoming message */
650 msg_ptr = urb->transfer_buffer;
651 msg_end = urb->transfer_buffer + urb->actual_length;
652 for (; msg_ptr < msg_end;) {
653 u16 rx_msg_type, rx_msg_size;
654
655 rx_msg = (struct pucan_msg *)msg_ptr;
656 if (!rx_msg->size) {
657 /* null packet found: end of list */
658 break;
659 }
660
661 rx_msg_size = le16_to_cpu(rx_msg->size);
662 rx_msg_type = le16_to_cpu(rx_msg->type);
663
664 /* check if the record goes out of current packet */
665 if (msg_ptr + rx_msg_size > msg_end) {
666 netdev_err(netdev,
667 "got frag rec: should inc usb rx buf sze\n");
668 err = -EBADMSG;
669 break;
670 }
671
672 switch (rx_msg_type) {
673 case PUCAN_MSG_CAN_RX:
674 err = pcan_usb_fd_decode_canmsg(usb_if, rx_msg);
675 if (err < 0)
676 goto fail;
677 break;
678
679 case PCAN_UFD_MSG_CALIBRATION:
680 pcan_usb_fd_decode_ts(usb_if, rx_msg);
681 break;
682
683 case PUCAN_MSG_ERROR:
684 err = pcan_usb_fd_decode_error(usb_if, rx_msg);
685 if (err < 0)
686 goto fail;
687 break;
688
689 case PUCAN_MSG_STATUS:
690 err = pcan_usb_fd_decode_status(usb_if, rx_msg);
691 if (err < 0)
692 goto fail;
693 break;
694
695 case PCAN_UFD_MSG_OVERRUN:
696 err = pcan_usb_fd_decode_overrun(usb_if, rx_msg);
697 if (err < 0)
698 goto fail;
699 break;
700
701 default:
702 netdev_err(netdev,
703 "unhandled msg type 0x%02x (%d): ignored\n",
704 rx_msg_type, rx_msg_type);
705 break;
706 }
707
708 msg_ptr += rx_msg_size;
709 }
710
711 fail:
712 if (err)
713 pcan_dump_mem("received msg",
714 urb->transfer_buffer, urb->actual_length);
715 return err;
716 }
717
718 /* CAN/CANFD frames encoding callback */
719 static int pcan_usb_fd_encode_msg(struct peak_usb_device *dev,
720 struct sk_buff *skb, u8 *obuf, size_t *size)
721 {
722 struct pucan_tx_msg *tx_msg = (struct pucan_tx_msg *)obuf;
723 struct canfd_frame *cfd = (struct canfd_frame *)skb->data;
724 u16 tx_msg_size, tx_msg_flags;
725 u8 can_dlc;
726
727 tx_msg_size = ALIGN(sizeof(struct pucan_tx_msg) + cfd->len, 4);
728 tx_msg->size = cpu_to_le16(tx_msg_size);
729 tx_msg->type = cpu_to_le16(PUCAN_MSG_CAN_TX);
730
731 tx_msg_flags = 0;
732 if (cfd->can_id & CAN_EFF_FLAG) {
733 tx_msg_flags |= PUCAN_MSG_EXT_ID;
734 tx_msg->can_id = cpu_to_le32(cfd->can_id & CAN_EFF_MASK);
735 } else {
736 tx_msg->can_id = cpu_to_le32(cfd->can_id & CAN_SFF_MASK);
737 }
738
739 if (can_is_canfd_skb(skb)) {
740 /* considering a CANFD frame */
741 can_dlc = can_len2dlc(cfd->len);
742
743 tx_msg_flags |= PUCAN_MSG_EXT_DATA_LEN;
744
745 if (cfd->flags & CANFD_BRS)
746 tx_msg_flags |= PUCAN_MSG_BITRATE_SWITCH;
747
748 if (cfd->flags & CANFD_ESI)
749 tx_msg_flags |= PUCAN_MSG_ERROR_STATE_IND;
750 } else {
751 /* CAND 2.0 frames */
752 can_dlc = cfd->len;
753
754 if (cfd->can_id & CAN_RTR_FLAG)
755 tx_msg_flags |= PUCAN_MSG_RTR;
756 }
757
758 tx_msg->flags = cpu_to_le16(tx_msg_flags);
759 tx_msg->channel_dlc = PUCAN_MSG_CHANNEL_DLC(dev->ctrl_idx, can_dlc);
760 memcpy(tx_msg->d, cfd->data, cfd->len);
761
762 /* add null size message to tag the end (messages are 32-bits aligned)
763 */
764 tx_msg = (struct pucan_tx_msg *)(obuf + tx_msg_size);
765
766 tx_msg->size = 0;
767
768 /* set the whole size of the USB packet to send */
769 *size = tx_msg_size + sizeof(u32);
770
771 return 0;
772 }
773
774 /* start the interface (last chance before set bus on) */
775 static int pcan_usb_fd_start(struct peak_usb_device *dev)
776 {
777 struct pcan_usb_fd_device *pdev =
778 container_of(dev, struct pcan_usb_fd_device, dev);
779 int err;
780
781 /* set filter mode: all acceptance */
782 err = pcan_usb_fd_set_filter_std(dev, -1, 0xffffffff);
783 if (err)
784 return err;
785
786 /* opening first device: */
787 if (pdev->usb_if->dev_opened_count == 0) {
788 /* reset time_ref */
789 peak_usb_init_time_ref(&pdev->usb_if->time_ref,
790 &pcan_usb_pro_fd);
791
792 /* enable USB calibration messages */
793 err = pcan_usb_fd_set_options(dev, 1,
794 PUCAN_OPTION_ERROR,
795 PCAN_UFD_FLTEXT_CALIBRATION);
796 }
797
798 pdev->usb_if->dev_opened_count++;
799
800 /* reset cached error counters */
801 pdev->bec.txerr = 0;
802 pdev->bec.rxerr = 0;
803
804 return err;
805 }
806
807 /* socket callback used to copy berr counters values receieved through USB */
808 static int pcan_usb_fd_get_berr_counter(const struct net_device *netdev,
809 struct can_berr_counter *bec)
810 {
811 struct peak_usb_device *dev = netdev_priv(netdev);
812 struct pcan_usb_fd_device *pdev =
813 container_of(dev, struct pcan_usb_fd_device, dev);
814
815 *bec = pdev->bec;
816
817 /* must return 0 */
818 return 0;
819 }
820
821 /* stop interface (last chance before set bus off) */
822 static int pcan_usb_fd_stop(struct peak_usb_device *dev)
823 {
824 struct pcan_usb_fd_device *pdev =
825 container_of(dev, struct pcan_usb_fd_device, dev);
826
827 /* turn off special msgs for that interface if no other dev opened */
828 if (pdev->usb_if->dev_opened_count == 1)
829 pcan_usb_fd_set_options(dev, 0,
830 PUCAN_OPTION_ERROR,
831 PCAN_UFD_FLTEXT_CALIBRATION);
832 pdev->usb_if->dev_opened_count--;
833
834 return 0;
835 }
836
837 /* called when probing, to initialize a device object */
838 static int pcan_usb_fd_init(struct peak_usb_device *dev)
839 {
840 struct pcan_usb_fd_device *pdev =
841 container_of(dev, struct pcan_usb_fd_device, dev);
842 int i, err = -ENOMEM;
843
844 /* do this for 1st channel only */
845 if (!dev->prev_siblings) {
846 /* allocate netdevices common structure attached to first one */
847 pdev->usb_if = kzalloc(sizeof(*pdev->usb_if), GFP_KERNEL);
848 if (!pdev->usb_if)
849 goto err_out;
850
851 /* allocate command buffer once for all for the interface */
852 pdev->cmd_buffer_addr = kmalloc(PCAN_UFD_CMD_BUFFER_SIZE,
853 GFP_KERNEL);
854 if (!pdev->cmd_buffer_addr)
855 goto err_out_1;
856
857 /* number of ts msgs to ignore before taking one into account */
858 pdev->usb_if->cm_ignore_count = 5;
859
860 err = pcan_usb_pro_send_req(dev, PCAN_USBPRO_REQ_INFO,
861 PCAN_USBPRO_INFO_FW,
862 &pdev->usb_if->fw_info,
863 sizeof(pdev->usb_if->fw_info));
864 if (err) {
865 dev_err(dev->netdev->dev.parent,
866 "unable to read %s firmware info (err %d)\n",
867 dev->adapter->name, err);
868 goto err_out_2;
869 }
870
871 /* explicit use of dev_xxx() instead of netdev_xxx() here:
872 * information displayed are related to the device itself, not
873 * to the canx (channel) device.
874 */
875 dev_info(dev->netdev->dev.parent,
876 "PEAK-System %s v%u fw v%u.%u.%u (%u channels)\n",
877 dev->adapter->name, pdev->usb_if->fw_info.hw_version,
878 pdev->usb_if->fw_info.fw_version[0],
879 pdev->usb_if->fw_info.fw_version[1],
880 pdev->usb_if->fw_info.fw_version[2],
881 dev->adapter->ctrl_count);
882
883 /* check for ability to switch between ISO/non-ISO modes */
884 if (pdev->usb_if->fw_info.fw_version[0] >= 2) {
885 /* firmware >= 2.x supports ISO/non-ISO switching */
886 dev->can.ctrlmode_supported |= CAN_CTRLMODE_FD_NON_ISO;
887 } else {
888 /* firmware < 2.x only supports fixed(!) non-ISO */
889 dev->can.ctrlmode |= CAN_CTRLMODE_FD_NON_ISO;
890 }
891
892 /* tell the hardware the can driver is running */
893 err = pcan_usb_fd_drv_loaded(dev, 1);
894 if (err) {
895 dev_err(dev->netdev->dev.parent,
896 "unable to tell %s driver is loaded (err %d)\n",
897 dev->adapter->name, err);
898 goto err_out_2;
899 }
900 } else {
901 /* otherwise, simply copy previous sibling's values */
902 struct pcan_usb_fd_device *ppdev =
903 container_of(dev->prev_siblings,
904 struct pcan_usb_fd_device, dev);
905
906 pdev->usb_if = ppdev->usb_if;
907 pdev->cmd_buffer_addr = ppdev->cmd_buffer_addr;
908
909 /* do a copy of the ctrlmode[_supported] too */
910 dev->can.ctrlmode = ppdev->dev.can.ctrlmode;
911 dev->can.ctrlmode_supported = ppdev->dev.can.ctrlmode_supported;
912 }
913
914 pdev->usb_if->dev[dev->ctrl_idx] = dev;
915 dev->device_number =
916 le32_to_cpu(pdev->usb_if->fw_info.dev_id[dev->ctrl_idx]);
917
918 /* set clock domain */
919 for (i = 0; i < ARRAY_SIZE(pcan_usb_fd_clk_freq); i++)
920 if (dev->adapter->clock.freq == pcan_usb_fd_clk_freq[i])
921 break;
922
923 if (i >= ARRAY_SIZE(pcan_usb_fd_clk_freq)) {
924 dev_warn(dev->netdev->dev.parent,
925 "incompatible clock frequencies\n");
926 err = -EINVAL;
927 goto err_out_2;
928 }
929
930 pcan_usb_fd_set_clock_domain(dev, i);
931
932 /* set LED in default state (end of init phase) */
933 pcan_usb_fd_set_can_led(dev, PCAN_UFD_LED_DEF);
934
935 return 0;
936
937 err_out_2:
938 kfree(pdev->cmd_buffer_addr);
939 err_out_1:
940 kfree(pdev->usb_if);
941 err_out:
942 return err;
943 }
944
945 /* called when driver module is being unloaded */
946 static void pcan_usb_fd_exit(struct peak_usb_device *dev)
947 {
948 struct pcan_usb_fd_device *pdev =
949 container_of(dev, struct pcan_usb_fd_device, dev);
950
951 /* when rmmod called before unplug and if down, should reset things
952 * before leaving
953 */
954 if (dev->can.state != CAN_STATE_STOPPED) {
955 /* set bus off on the corresponding channel */
956 pcan_usb_fd_set_bus(dev, 0);
957 }
958
959 /* switch off corresponding CAN LEDs */
960 pcan_usb_fd_set_can_led(dev, PCAN_UFD_LED_OFF);
961
962 /* if channel #0 (only) */
963 if (dev->ctrl_idx == 0) {
964 /* turn off calibration message if any device were opened */
965 if (pdev->usb_if->dev_opened_count > 0)
966 pcan_usb_fd_set_options(dev, 0,
967 PUCAN_OPTION_ERROR,
968 PCAN_UFD_FLTEXT_CALIBRATION);
969
970 /* tell USB adapter that the driver is being unloaded */
971 pcan_usb_fd_drv_loaded(dev, 0);
972 }
973 }
974
975 /* called when the USB adapter is unplugged */
976 static void pcan_usb_fd_free(struct peak_usb_device *dev)
977 {
978 /* last device: can free shared objects now */
979 if (!dev->prev_siblings && !dev->next_siblings) {
980 struct pcan_usb_fd_device *pdev =
981 container_of(dev, struct pcan_usb_fd_device, dev);
982
983 /* free commands buffer */
984 kfree(pdev->cmd_buffer_addr);
985
986 /* free usb interface object */
987 kfree(pdev->usb_if);
988 }
989 }
990
991 /* describes the PCAN-USB FD adapter */
992 static const struct can_bittiming_const pcan_usb_fd_const = {
993 .name = "pcan_usb_fd",
994 .tseg1_min = 1,
995 .tseg1_max = (1 << PUCAN_TSLOW_TSGEG1_BITS),
996 .tseg2_min = 1,
997 .tseg2_max = (1 << PUCAN_TSLOW_TSGEG2_BITS),
998 .sjw_max = (1 << PUCAN_TSLOW_SJW_BITS),
999 .brp_min = 1,
1000 .brp_max = (1 << PUCAN_TSLOW_BRP_BITS),
1001 .brp_inc = 1,
1002 };
1003
1004 static const struct can_bittiming_const pcan_usb_fd_data_const = {
1005 .name = "pcan_usb_fd",
1006 .tseg1_min = 1,
1007 .tseg1_max = (1 << PUCAN_TFAST_TSGEG1_BITS),
1008 .tseg2_min = 1,
1009 .tseg2_max = (1 << PUCAN_TFAST_TSGEG2_BITS),
1010 .sjw_max = (1 << PUCAN_TFAST_SJW_BITS),
1011 .brp_min = 1,
1012 .brp_max = (1 << PUCAN_TFAST_BRP_BITS),
1013 .brp_inc = 1,
1014 };
1015
1016 const struct peak_usb_adapter pcan_usb_fd = {
1017 .name = "PCAN-USB FD",
1018 .device_id = PCAN_USBFD_PRODUCT_ID,
1019 .ctrl_count = PCAN_USBFD_CHANNEL_COUNT,
1020 .ctrlmode_supported = CAN_CTRLMODE_FD |
1021 CAN_CTRLMODE_3_SAMPLES | CAN_CTRLMODE_LISTENONLY,
1022 .clock = {
1023 .freq = PCAN_UFD_CRYSTAL_HZ,
1024 },
1025 .bittiming_const = &pcan_usb_fd_const,
1026 .data_bittiming_const = &pcan_usb_fd_data_const,
1027
1028 /* size of device private data */
1029 .sizeof_dev_private = sizeof(struct pcan_usb_fd_device),
1030
1031 /* timestamps usage */
1032 .ts_used_bits = 32,
1033 .ts_period = 1000000, /* calibration period in ts. */
1034 .us_per_ts_scale = 1, /* us = (ts * scale) >> shift */
1035 .us_per_ts_shift = 0,
1036
1037 /* give here messages in/out endpoints */
1038 .ep_msg_in = PCAN_USBPRO_EP_MSGIN,
1039 .ep_msg_out = {PCAN_USBPRO_EP_MSGOUT_0},
1040
1041 /* size of rx/tx usb buffers */
1042 .rx_buffer_size = PCAN_UFD_RX_BUFFER_SIZE,
1043 .tx_buffer_size = PCAN_UFD_TX_BUFFER_SIZE,
1044
1045 /* device callbacks */
1046 .intf_probe = pcan_usb_pro_probe, /* same as PCAN-USB Pro */
1047 .dev_init = pcan_usb_fd_init,
1048
1049 .dev_exit = pcan_usb_fd_exit,
1050 .dev_free = pcan_usb_fd_free,
1051 .dev_set_bus = pcan_usb_fd_set_bus,
1052 .dev_set_bittiming = pcan_usb_fd_set_bittiming_slow,
1053 .dev_set_data_bittiming = pcan_usb_fd_set_bittiming_fast,
1054 .dev_decode_buf = pcan_usb_fd_decode_buf,
1055 .dev_start = pcan_usb_fd_start,
1056 .dev_stop = pcan_usb_fd_stop,
1057 .dev_restart_async = pcan_usb_fd_restart_async,
1058 .dev_encode_msg = pcan_usb_fd_encode_msg,
1059
1060 .do_get_berr_counter = pcan_usb_fd_get_berr_counter,
1061 };
1062
1063 /* describes the PCAN-CHIP USB */
1064 static const struct can_bittiming_const pcan_usb_chip_const = {
1065 .name = "pcan_chip_usb",
1066 .tseg1_min = 1,
1067 .tseg1_max = (1 << PUCAN_TSLOW_TSGEG1_BITS),
1068 .tseg2_min = 1,
1069 .tseg2_max = (1 << PUCAN_TSLOW_TSGEG2_BITS),
1070 .sjw_max = (1 << PUCAN_TSLOW_SJW_BITS),
1071 .brp_min = 1,
1072 .brp_max = (1 << PUCAN_TSLOW_BRP_BITS),
1073 .brp_inc = 1,
1074 };
1075
1076 static const struct can_bittiming_const pcan_usb_chip_data_const = {
1077 .name = "pcan_chip_usb",
1078 .tseg1_min = 1,
1079 .tseg1_max = (1 << PUCAN_TFAST_TSGEG1_BITS),
1080 .tseg2_min = 1,
1081 .tseg2_max = (1 << PUCAN_TFAST_TSGEG2_BITS),
1082 .sjw_max = (1 << PUCAN_TFAST_SJW_BITS),
1083 .brp_min = 1,
1084 .brp_max = (1 << PUCAN_TFAST_BRP_BITS),
1085 .brp_inc = 1,
1086 };
1087
1088 const struct peak_usb_adapter pcan_usb_chip = {
1089 .name = "PCAN-Chip USB",
1090 .device_id = PCAN_USBCHIP_PRODUCT_ID,
1091 .ctrl_count = PCAN_USBFD_CHANNEL_COUNT,
1092 .ctrlmode_supported = CAN_CTRLMODE_FD |
1093 CAN_CTRLMODE_3_SAMPLES | CAN_CTRLMODE_LISTENONLY,
1094 .clock = {
1095 .freq = PCAN_UFD_CRYSTAL_HZ,
1096 },
1097 .bittiming_const = &pcan_usb_chip_const,
1098 .data_bittiming_const = &pcan_usb_chip_data_const,
1099
1100 /* size of device private data */
1101 .sizeof_dev_private = sizeof(struct pcan_usb_fd_device),
1102
1103 /* timestamps usage */
1104 .ts_used_bits = 32,
1105 .ts_period = 1000000, /* calibration period in ts. */
1106 .us_per_ts_scale = 1, /* us = (ts * scale) >> shift */
1107 .us_per_ts_shift = 0,
1108
1109 /* give here messages in/out endpoints */
1110 .ep_msg_in = PCAN_USBPRO_EP_MSGIN,
1111 .ep_msg_out = {PCAN_USBPRO_EP_MSGOUT_0},
1112
1113 /* size of rx/tx usb buffers */
1114 .rx_buffer_size = PCAN_UFD_RX_BUFFER_SIZE,
1115 .tx_buffer_size = PCAN_UFD_TX_BUFFER_SIZE,
1116
1117 /* device callbacks */
1118 .intf_probe = pcan_usb_pro_probe, /* same as PCAN-USB Pro */
1119 .dev_init = pcan_usb_fd_init,
1120
1121 .dev_exit = pcan_usb_fd_exit,
1122 .dev_free = pcan_usb_fd_free,
1123 .dev_set_bus = pcan_usb_fd_set_bus,
1124 .dev_set_bittiming = pcan_usb_fd_set_bittiming_slow,
1125 .dev_set_data_bittiming = pcan_usb_fd_set_bittiming_fast,
1126 .dev_decode_buf = pcan_usb_fd_decode_buf,
1127 .dev_start = pcan_usb_fd_start,
1128 .dev_stop = pcan_usb_fd_stop,
1129 .dev_restart_async = pcan_usb_fd_restart_async,
1130 .dev_encode_msg = pcan_usb_fd_encode_msg,
1131
1132 .do_get_berr_counter = pcan_usb_fd_get_berr_counter,
1133 };
1134
1135 /* describes the PCAN-USB Pro FD adapter */
1136 static const struct can_bittiming_const pcan_usb_pro_fd_const = {
1137 .name = "pcan_usb_pro_fd",
1138 .tseg1_min = 1,
1139 .tseg1_max = (1 << PUCAN_TSLOW_TSGEG1_BITS),
1140 .tseg2_min = 1,
1141 .tseg2_max = (1 << PUCAN_TSLOW_TSGEG2_BITS),
1142 .sjw_max = (1 << PUCAN_TSLOW_SJW_BITS),
1143 .brp_min = 1,
1144 .brp_max = (1 << PUCAN_TSLOW_BRP_BITS),
1145 .brp_inc = 1,
1146 };
1147
1148 static const struct can_bittiming_const pcan_usb_pro_fd_data_const = {
1149 .name = "pcan_usb_pro_fd",
1150 .tseg1_min = 1,
1151 .tseg1_max = (1 << PUCAN_TFAST_TSGEG1_BITS),
1152 .tseg2_min = 1,
1153 .tseg2_max = (1 << PUCAN_TFAST_TSGEG2_BITS),
1154 .sjw_max = (1 << PUCAN_TFAST_SJW_BITS),
1155 .brp_min = 1,
1156 .brp_max = (1 << PUCAN_TFAST_BRP_BITS),
1157 .brp_inc = 1,
1158 };
1159
1160 const struct peak_usb_adapter pcan_usb_pro_fd = {
1161 .name = "PCAN-USB Pro FD",
1162 .device_id = PCAN_USBPROFD_PRODUCT_ID,
1163 .ctrl_count = PCAN_USBPROFD_CHANNEL_COUNT,
1164 .ctrlmode_supported = CAN_CTRLMODE_FD |
1165 CAN_CTRLMODE_3_SAMPLES | CAN_CTRLMODE_LISTENONLY,
1166 .clock = {
1167 .freq = PCAN_UFD_CRYSTAL_HZ,
1168 },
1169 .bittiming_const = &pcan_usb_pro_fd_const,
1170 .data_bittiming_const = &pcan_usb_pro_fd_data_const,
1171
1172 /* size of device private data */
1173 .sizeof_dev_private = sizeof(struct pcan_usb_fd_device),
1174
1175 /* timestamps usage */
1176 .ts_used_bits = 32,
1177 .ts_period = 1000000, /* calibration period in ts. */
1178 .us_per_ts_scale = 1, /* us = (ts * scale) >> shift */
1179 .us_per_ts_shift = 0,
1180
1181 /* give here messages in/out endpoints */
1182 .ep_msg_in = PCAN_USBPRO_EP_MSGIN,
1183 .ep_msg_out = {PCAN_USBPRO_EP_MSGOUT_0, PCAN_USBPRO_EP_MSGOUT_1},
1184
1185 /* size of rx/tx usb buffers */
1186 .rx_buffer_size = PCAN_UFD_RX_BUFFER_SIZE,
1187 .tx_buffer_size = PCAN_UFD_TX_BUFFER_SIZE,
1188
1189 /* device callbacks */
1190 .intf_probe = pcan_usb_pro_probe, /* same as PCAN-USB Pro */
1191 .dev_init = pcan_usb_fd_init,
1192
1193 .dev_exit = pcan_usb_fd_exit,
1194 .dev_free = pcan_usb_fd_free,
1195 .dev_set_bus = pcan_usb_fd_set_bus,
1196 .dev_set_bittiming = pcan_usb_fd_set_bittiming_slow,
1197 .dev_set_data_bittiming = pcan_usb_fd_set_bittiming_fast,
1198 .dev_decode_buf = pcan_usb_fd_decode_buf,
1199 .dev_start = pcan_usb_fd_start,
1200 .dev_stop = pcan_usb_fd_stop,
1201 .dev_restart_async = pcan_usb_fd_restart_async,
1202 .dev_encode_msg = pcan_usb_fd_encode_msg,
1203
1204 .do_get_berr_counter = pcan_usb_fd_get_berr_counter,
1205 };
1206
1207 /* describes the PCAN-USB X6 adapter */
1208 static const struct can_bittiming_const pcan_usb_x6_const = {
1209 .name = "pcan_usb_x6",
1210 .tseg1_min = 1,
1211 .tseg1_max = (1 << PUCAN_TSLOW_TSGEG1_BITS),
1212 .tseg2_min = 1,
1213 .tseg2_max = (1 << PUCAN_TSLOW_TSGEG2_BITS),
1214 .sjw_max = (1 << PUCAN_TSLOW_SJW_BITS),
1215 .brp_min = 1,
1216 .brp_max = (1 << PUCAN_TSLOW_BRP_BITS),
1217 .brp_inc = 1,
1218 };
1219
1220 static const struct can_bittiming_const pcan_usb_x6_data_const = {
1221 .name = "pcan_usb_x6",
1222 .tseg1_min = 1,
1223 .tseg1_max = (1 << PUCAN_TFAST_TSGEG1_BITS),
1224 .tseg2_min = 1,
1225 .tseg2_max = (1 << PUCAN_TFAST_TSGEG2_BITS),
1226 .sjw_max = (1 << PUCAN_TFAST_SJW_BITS),
1227 .brp_min = 1,
1228 .brp_max = (1 << PUCAN_TFAST_BRP_BITS),
1229 .brp_inc = 1,
1230 };
1231
1232 const struct peak_usb_adapter pcan_usb_x6 = {
1233 .name = "PCAN-USB X6",
1234 .device_id = PCAN_USBX6_PRODUCT_ID,
1235 .ctrl_count = PCAN_USBPROFD_CHANNEL_COUNT,
1236 .ctrlmode_supported = CAN_CTRLMODE_FD |
1237 CAN_CTRLMODE_3_SAMPLES | CAN_CTRLMODE_LISTENONLY,
1238 .clock = {
1239 .freq = PCAN_UFD_CRYSTAL_HZ,
1240 },
1241 .bittiming_const = &pcan_usb_x6_const,
1242 .data_bittiming_const = &pcan_usb_x6_data_const,
1243
1244 /* size of device private data */
1245 .sizeof_dev_private = sizeof(struct pcan_usb_fd_device),
1246
1247 /* timestamps usage */
1248 .ts_used_bits = 32,
1249 .ts_period = 1000000, /* calibration period in ts. */
1250 .us_per_ts_scale = 1, /* us = (ts * scale) >> shift */
1251 .us_per_ts_shift = 0,
1252
1253 /* give here messages in/out endpoints */
1254 .ep_msg_in = PCAN_USBPRO_EP_MSGIN,
1255 .ep_msg_out = {PCAN_USBPRO_EP_MSGOUT_0, PCAN_USBPRO_EP_MSGOUT_1},
1256
1257 /* size of rx/tx usb buffers */
1258 .rx_buffer_size = PCAN_UFD_RX_BUFFER_SIZE,
1259 .tx_buffer_size = PCAN_UFD_TX_BUFFER_SIZE,
1260
1261 /* device callbacks */
1262 .intf_probe = pcan_usb_pro_probe, /* same as PCAN-USB Pro */
1263 .dev_init = pcan_usb_fd_init,
1264
1265 .dev_exit = pcan_usb_fd_exit,
1266 .dev_free = pcan_usb_fd_free,
1267 .dev_set_bus = pcan_usb_fd_set_bus,
1268 .dev_set_bittiming = pcan_usb_fd_set_bittiming_slow,
1269 .dev_set_data_bittiming = pcan_usb_fd_set_bittiming_fast,
1270 .dev_decode_buf = pcan_usb_fd_decode_buf,
1271 .dev_start = pcan_usb_fd_start,
1272 .dev_stop = pcan_usb_fd_stop,
1273 .dev_restart_async = pcan_usb_fd_restart_async,
1274 .dev_encode_msg = pcan_usb_fd_encode_msg,
1275
1276 .do_get_berr_counter = pcan_usb_fd_get_berr_counter,
1277 };
CRIS linux kernel tree