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9#include <linux/netdevice.h>
10#include <linux/usb.h>
11#include <linux/module.h>
12#include <linux/ethtool.h>
13
14#include <linux/can.h>
15#include <linux/can/dev.h>
16#include <linux/can/error.h>
17
18#include "pcan_usb_core.h"
19#include "pcan_usb_pro.h"
20
21#define PCAN_USBPRO_CHANNEL_COUNT 2
22
23
24#define PCAN_USBPRO_CRYSTAL_HZ 56000000
25
26
27#define PCAN_USBPRO_COMMAND_TIMEOUT 1000
28
29
30#define PCAN_USBPRO_RX_BUFFER_SIZE 1024
31#define PCAN_USBPRO_TX_BUFFER_SIZE 64
32
33#define PCAN_USBPRO_MSG_HEADER_LEN 4
34
35
36#define PCAN_USBPRO_RSP_SUBMIT_MAX 2
37
38#define PCAN_USBPRO_RTR 0x01
39#define PCAN_USBPRO_EXT 0x02
40#define PCAN_USBPRO_SS 0x08
41
42#define PCAN_USBPRO_CMD_BUFFER_SIZE 512
43
44
45struct pcan_usb_pro_interface {
46 struct peak_usb_device *dev[PCAN_USBPRO_CHANNEL_COUNT];
47 struct peak_time_ref time_ref;
48 int cm_ignore_count;
49 int dev_opened_count;
50};
51
52
53struct pcan_usb_pro_device {
54 struct peak_usb_device dev;
55 struct pcan_usb_pro_interface *usb_if;
56 u32 cached_ccbt;
57};
58
59
60struct pcan_usb_pro_msg {
61 u8 *rec_ptr;
62 int rec_buffer_size;
63 int rec_buffer_len;
64 union {
65 __le16 *rec_cnt_rd;
66 __le32 *rec_cnt;
67 u8 *rec_buffer;
68 } u;
69};
70
71
72static u16 pcan_usb_pro_sizeof_rec[256] = {
73 [PCAN_USBPRO_SETBTR] = sizeof(struct pcan_usb_pro_btr),
74 [PCAN_USBPRO_SETBUSACT] = sizeof(struct pcan_usb_pro_busact),
75 [PCAN_USBPRO_SETSILENT] = sizeof(struct pcan_usb_pro_silent),
76 [PCAN_USBPRO_SETFILTR] = sizeof(struct pcan_usb_pro_filter),
77 [PCAN_USBPRO_SETTS] = sizeof(struct pcan_usb_pro_setts),
78 [PCAN_USBPRO_GETDEVID] = sizeof(struct pcan_usb_pro_devid),
79 [PCAN_USBPRO_SETLED] = sizeof(struct pcan_usb_pro_setled),
80 [PCAN_USBPRO_RXMSG8] = sizeof(struct pcan_usb_pro_rxmsg),
81 [PCAN_USBPRO_RXMSG4] = sizeof(struct pcan_usb_pro_rxmsg) - 4,
82 [PCAN_USBPRO_RXMSG0] = sizeof(struct pcan_usb_pro_rxmsg) - 8,
83 [PCAN_USBPRO_RXRTR] = sizeof(struct pcan_usb_pro_rxmsg) - 8,
84 [PCAN_USBPRO_RXSTATUS] = sizeof(struct pcan_usb_pro_rxstatus),
85 [PCAN_USBPRO_RXTS] = sizeof(struct pcan_usb_pro_rxts),
86 [PCAN_USBPRO_TXMSG8] = sizeof(struct pcan_usb_pro_txmsg),
87 [PCAN_USBPRO_TXMSG4] = sizeof(struct pcan_usb_pro_txmsg) - 4,
88 [PCAN_USBPRO_TXMSG0] = sizeof(struct pcan_usb_pro_txmsg) - 8,
89};
90
91
92
93
94static u8 *pcan_msg_init(struct pcan_usb_pro_msg *pm, void *buffer_addr,
95 int buffer_size)
96{
97 if (buffer_size < PCAN_USBPRO_MSG_HEADER_LEN)
98 return NULL;
99
100 pm->u.rec_buffer = (u8 *)buffer_addr;
101 pm->rec_buffer_size = pm->rec_buffer_len = buffer_size;
102 pm->rec_ptr = pm->u.rec_buffer + PCAN_USBPRO_MSG_HEADER_LEN;
103
104 return pm->rec_ptr;
105}
106
107static u8 *pcan_msg_init_empty(struct pcan_usb_pro_msg *pm,
108 void *buffer_addr, int buffer_size)
109{
110 u8 *pr = pcan_msg_init(pm, buffer_addr, buffer_size);
111
112 if (pr) {
113 pm->rec_buffer_len = PCAN_USBPRO_MSG_HEADER_LEN;
114 *pm->u.rec_cnt = 0;
115 }
116 return pr;
117}
118
119
120
121
122static int pcan_msg_add_rec(struct pcan_usb_pro_msg *pm, int id, ...)
123{
124 int len, i;
125 u8 *pc;
126 va_list ap;
127
128 va_start(ap, id);
129
130 pc = pm->rec_ptr + 1;
131
132 i = 0;
133 switch (id) {
134 case PCAN_USBPRO_TXMSG8:
135 i += 4;
136 fallthrough;
137 case PCAN_USBPRO_TXMSG4:
138 i += 4;
139 fallthrough;
140 case PCAN_USBPRO_TXMSG0:
141 *pc++ = va_arg(ap, int);
142 *pc++ = va_arg(ap, int);
143 *pc++ = va_arg(ap, int);
144 *(__le32 *)pc = cpu_to_le32(va_arg(ap, u32));
145 pc += 4;
146 memcpy(pc, va_arg(ap, int *), i);
147 pc += i;
148 break;
149
150 case PCAN_USBPRO_SETBTR:
151 case PCAN_USBPRO_GETDEVID:
152 *pc++ = va_arg(ap, int);
153 pc += 2;
154 *(__le32 *)pc = cpu_to_le32(va_arg(ap, u32));
155 pc += 4;
156 break;
157
158 case PCAN_USBPRO_SETFILTR:
159 case PCAN_USBPRO_SETBUSACT:
160 case PCAN_USBPRO_SETSILENT:
161 *pc++ = va_arg(ap, int);
162 *(__le16 *)pc = cpu_to_le16(va_arg(ap, int));
163 pc += 2;
164 break;
165
166 case PCAN_USBPRO_SETLED:
167 *pc++ = va_arg(ap, int);
168 *(__le16 *)pc = cpu_to_le16(va_arg(ap, int));
169 pc += 2;
170 *(__le32 *)pc = cpu_to_le32(va_arg(ap, u32));
171 pc += 4;
172 break;
173
174 case PCAN_USBPRO_SETTS:
175 pc++;
176 *(__le16 *)pc = cpu_to_le16(va_arg(ap, int));
177 pc += 2;
178 break;
179
180 default:
181 pr_err("%s: %s(): unknown data type %02Xh (%d)\n",
182 PCAN_USB_DRIVER_NAME, __func__, id, id);
183 pc--;
184 break;
185 }
186
187 len = pc - pm->rec_ptr;
188 if (len > 0) {
189 le32_add_cpu(pm->u.rec_cnt, 1);
190 *pm->rec_ptr = id;
191
192 pm->rec_ptr = pc;
193 pm->rec_buffer_len += len;
194 }
195
196 va_end(ap);
197
198 return len;
199}
200
201
202
203
204static int pcan_usb_pro_send_cmd(struct peak_usb_device *dev,
205 struct pcan_usb_pro_msg *pum)
206{
207 int actual_length;
208 int err;
209
210
211 if (!(dev->state & PCAN_USB_STATE_CONNECTED))
212 return 0;
213
214 err = usb_bulk_msg(dev->udev,
215 usb_sndbulkpipe(dev->udev, PCAN_USBPRO_EP_CMDOUT),
216 pum->u.rec_buffer, pum->rec_buffer_len,
217 &actual_length, PCAN_USBPRO_COMMAND_TIMEOUT);
218 if (err)
219 netdev_err(dev->netdev, "sending command failure: %d\n", err);
220
221 return err;
222}
223
224
225
226
227static int pcan_usb_pro_wait_rsp(struct peak_usb_device *dev,
228 struct pcan_usb_pro_msg *pum)
229{
230 u8 req_data_type, req_channel;
231 int actual_length;
232 int i, err = 0;
233
234
235 if (!(dev->state & PCAN_USB_STATE_CONNECTED))
236 return 0;
237
238 req_data_type = pum->u.rec_buffer[4];
239 req_channel = pum->u.rec_buffer[5];
240
241 *pum->u.rec_cnt = 0;
242 for (i = 0; !err && i < PCAN_USBPRO_RSP_SUBMIT_MAX; i++) {
243 struct pcan_usb_pro_msg rsp;
244 union pcan_usb_pro_rec *pr;
245 u32 r, rec_cnt;
246 u16 rec_len;
247 u8 *pc;
248
249 err = usb_bulk_msg(dev->udev,
250 usb_rcvbulkpipe(dev->udev, PCAN_USBPRO_EP_CMDIN),
251 pum->u.rec_buffer, pum->rec_buffer_len,
252 &actual_length, PCAN_USBPRO_COMMAND_TIMEOUT);
253 if (err) {
254 netdev_err(dev->netdev, "waiting rsp error %d\n", err);
255 break;
256 }
257
258 if (actual_length == 0)
259 continue;
260
261 err = -EBADMSG;
262 if (actual_length < PCAN_USBPRO_MSG_HEADER_LEN) {
263 netdev_err(dev->netdev,
264 "got abnormal too small rsp (len=%d)\n",
265 actual_length);
266 break;
267 }
268
269 pc = pcan_msg_init(&rsp, pum->u.rec_buffer,
270 actual_length);
271
272 rec_cnt = le32_to_cpu(*rsp.u.rec_cnt);
273
274
275 for (r = 0; r < rec_cnt; r++) {
276 pr = (union pcan_usb_pro_rec *)pc;
277 rec_len = pcan_usb_pro_sizeof_rec[pr->data_type];
278 if (!rec_len) {
279 netdev_err(dev->netdev,
280 "got unprocessed record in msg\n");
281 pcan_dump_mem("rcvd rsp msg", pum->u.rec_buffer,
282 actual_length);
283 break;
284 }
285
286
287 if (pr->data_type != req_data_type)
288 netdev_err(dev->netdev,
289 "got unwanted rsp %xh: ignored\n",
290 pr->data_type);
291
292
293 else if ((req_channel != 0xff) &&
294 (pr->bus_act.channel != req_channel))
295 netdev_err(dev->netdev,
296 "got rsp %xh but on chan%u: ignored\n",
297 req_data_type, pr->bus_act.channel);
298
299
300 else
301 return 0;
302
303
304 pc += rec_len;
305 }
306 }
307
308 return (i >= PCAN_USBPRO_RSP_SUBMIT_MAX) ? -ERANGE : err;
309}
310
311int pcan_usb_pro_send_req(struct peak_usb_device *dev, int req_id,
312 int req_value, void *req_addr, int req_size)
313{
314 int err;
315 u8 req_type;
316 unsigned int p;
317
318
319 if (!(dev->state & PCAN_USB_STATE_CONNECTED))
320 return 0;
321
322 req_type = USB_TYPE_VENDOR | USB_RECIP_OTHER;
323
324 switch (req_id) {
325 case PCAN_USBPRO_REQ_FCT:
326 p = usb_sndctrlpipe(dev->udev, 0);
327 break;
328
329 default:
330 p = usb_rcvctrlpipe(dev->udev, 0);
331 req_type |= USB_DIR_IN;
332 memset(req_addr, '\0', req_size);
333 break;
334 }
335
336 err = usb_control_msg(dev->udev, p, req_id, req_type, req_value, 0,
337 req_addr, req_size, 2 * USB_CTRL_GET_TIMEOUT);
338 if (err < 0) {
339 netdev_info(dev->netdev,
340 "unable to request usb[type=%d value=%d] err=%d\n",
341 req_id, req_value, err);
342 return err;
343 }
344
345 return 0;
346}
347
348static int pcan_usb_pro_set_ts(struct peak_usb_device *dev, u16 onoff)
349{
350 struct pcan_usb_pro_msg um;
351
352 pcan_msg_init_empty(&um, dev->cmd_buf, PCAN_USB_MAX_CMD_LEN);
353 pcan_msg_add_rec(&um, PCAN_USBPRO_SETTS, onoff);
354
355 return pcan_usb_pro_send_cmd(dev, &um);
356}
357
358static int pcan_usb_pro_set_bitrate(struct peak_usb_device *dev, u32 ccbt)
359{
360 struct pcan_usb_pro_device *pdev =
361 container_of(dev, struct pcan_usb_pro_device, dev);
362 struct pcan_usb_pro_msg um;
363
364 pcan_msg_init_empty(&um, dev->cmd_buf, PCAN_USB_MAX_CMD_LEN);
365 pcan_msg_add_rec(&um, PCAN_USBPRO_SETBTR, dev->ctrl_idx, ccbt);
366
367
368 pdev->cached_ccbt = ccbt;
369
370 return pcan_usb_pro_send_cmd(dev, &um);
371}
372
373static int pcan_usb_pro_set_bus(struct peak_usb_device *dev, u8 onoff)
374{
375 struct pcan_usb_pro_msg um;
376
377
378 if (onoff) {
379 struct pcan_usb_pro_device *pdev =
380 container_of(dev, struct pcan_usb_pro_device, dev);
381
382 pcan_usb_pro_set_bitrate(dev, pdev->cached_ccbt);
383 }
384
385 pcan_msg_init_empty(&um, dev->cmd_buf, PCAN_USB_MAX_CMD_LEN);
386 pcan_msg_add_rec(&um, PCAN_USBPRO_SETBUSACT, dev->ctrl_idx, onoff);
387
388 return pcan_usb_pro_send_cmd(dev, &um);
389}
390
391static int pcan_usb_pro_set_silent(struct peak_usb_device *dev, u8 onoff)
392{
393 struct pcan_usb_pro_msg um;
394
395 pcan_msg_init_empty(&um, dev->cmd_buf, PCAN_USB_MAX_CMD_LEN);
396 pcan_msg_add_rec(&um, PCAN_USBPRO_SETSILENT, dev->ctrl_idx, onoff);
397
398 return pcan_usb_pro_send_cmd(dev, &um);
399}
400
401static int pcan_usb_pro_set_filter(struct peak_usb_device *dev, u16 filter_mode)
402{
403 struct pcan_usb_pro_msg um;
404
405 pcan_msg_init_empty(&um, dev->cmd_buf, PCAN_USB_MAX_CMD_LEN);
406 pcan_msg_add_rec(&um, PCAN_USBPRO_SETFILTR, dev->ctrl_idx, filter_mode);
407
408 return pcan_usb_pro_send_cmd(dev, &um);
409}
410
411static int pcan_usb_pro_set_led(struct peak_usb_device *dev, u8 mode,
412 u32 timeout)
413{
414 struct pcan_usb_pro_msg um;
415
416 pcan_msg_init_empty(&um, dev->cmd_buf, PCAN_USB_MAX_CMD_LEN);
417 pcan_msg_add_rec(&um, PCAN_USBPRO_SETLED, dev->ctrl_idx, mode, timeout);
418
419 return pcan_usb_pro_send_cmd(dev, &um);
420}
421
422static int pcan_usb_pro_get_device_id(struct peak_usb_device *dev,
423 u32 *device_id)
424{
425 struct pcan_usb_pro_devid *pdn;
426 struct pcan_usb_pro_msg um;
427 int err;
428 u8 *pc;
429
430 pc = pcan_msg_init_empty(&um, dev->cmd_buf, PCAN_USB_MAX_CMD_LEN);
431 pcan_msg_add_rec(&um, PCAN_USBPRO_GETDEVID, dev->ctrl_idx);
432
433 err = pcan_usb_pro_send_cmd(dev, &um);
434 if (err)
435 return err;
436
437 err = pcan_usb_pro_wait_rsp(dev, &um);
438 if (err)
439 return err;
440
441 pdn = (struct pcan_usb_pro_devid *)pc;
442 *device_id = le32_to_cpu(pdn->serial_num);
443
444 return err;
445}
446
447static int pcan_usb_pro_set_bittiming(struct peak_usb_device *dev,
448 struct can_bittiming *bt)
449{
450 u32 ccbt;
451
452 ccbt = (dev->can.ctrlmode & CAN_CTRLMODE_3_SAMPLES) ? 0x00800000 : 0;
453 ccbt |= (bt->sjw - 1) << 24;
454 ccbt |= (bt->phase_seg2 - 1) << 20;
455 ccbt |= (bt->prop_seg + bt->phase_seg1 - 1) << 16;
456 ccbt |= bt->brp - 1;
457
458 netdev_info(dev->netdev, "setting ccbt=0x%08x\n", ccbt);
459
460 return pcan_usb_pro_set_bitrate(dev, ccbt);
461}
462
463void pcan_usb_pro_restart_complete(struct urb *urb)
464{
465
466 peak_usb_async_complete(urb);
467
468
469 peak_usb_restart_complete(urb->context);
470}
471
472
473
474
475static int pcan_usb_pro_restart_async(struct peak_usb_device *dev,
476 struct urb *urb, u8 *buf)
477{
478 struct pcan_usb_pro_msg um;
479
480 pcan_msg_init_empty(&um, buf, PCAN_USB_MAX_CMD_LEN);
481 pcan_msg_add_rec(&um, PCAN_USBPRO_SETBUSACT, dev->ctrl_idx, 1);
482
483 usb_fill_bulk_urb(urb, dev->udev,
484 usb_sndbulkpipe(dev->udev, PCAN_USBPRO_EP_CMDOUT),
485 buf, PCAN_USB_MAX_CMD_LEN,
486 pcan_usb_pro_restart_complete, dev);
487
488 return usb_submit_urb(urb, GFP_ATOMIC);
489}
490
491static int pcan_usb_pro_drv_loaded(struct peak_usb_device *dev, int loaded)
492{
493 u8 *buffer;
494 int err;
495
496 buffer = kzalloc(PCAN_USBPRO_FCT_DRVLD_REQ_LEN, GFP_KERNEL);
497 if (!buffer)
498 return -ENOMEM;
499
500 buffer[0] = 0;
501 buffer[1] = !!loaded;
502
503 err = pcan_usb_pro_send_req(dev, PCAN_USBPRO_REQ_FCT,
504 PCAN_USBPRO_FCT_DRVLD, buffer,
505 PCAN_USBPRO_FCT_DRVLD_REQ_LEN);
506 kfree(buffer);
507
508 return err;
509}
510
511static inline
512struct pcan_usb_pro_interface *pcan_usb_pro_dev_if(struct peak_usb_device *dev)
513{
514 struct pcan_usb_pro_device *pdev =
515 container_of(dev, struct pcan_usb_pro_device, dev);
516 return pdev->usb_if;
517}
518
519static int pcan_usb_pro_handle_canmsg(struct pcan_usb_pro_interface *usb_if,
520 struct pcan_usb_pro_rxmsg *rx)
521{
522 const unsigned int ctrl_idx = (rx->len >> 4) & 0x0f;
523 struct peak_usb_device *dev = usb_if->dev[ctrl_idx];
524 struct net_device *netdev = dev->netdev;
525 struct can_frame *can_frame;
526 struct sk_buff *skb;
527 struct skb_shared_hwtstamps *hwts;
528
529 skb = alloc_can_skb(netdev, &can_frame);
530 if (!skb)
531 return -ENOMEM;
532
533 can_frame->can_id = le32_to_cpu(rx->id);
534 can_frame->len = rx->len & 0x0f;
535
536 if (rx->flags & PCAN_USBPRO_EXT)
537 can_frame->can_id |= CAN_EFF_FLAG;
538
539 if (rx->flags & PCAN_USBPRO_RTR)
540 can_frame->can_id |= CAN_RTR_FLAG;
541 else
542 memcpy(can_frame->data, rx->data, can_frame->len);
543
544 hwts = skb_hwtstamps(skb);
545 peak_usb_get_ts_time(&usb_if->time_ref, le32_to_cpu(rx->ts32),
546 &hwts->hwtstamp);
547
548 netdev->stats.rx_packets++;
549 netdev->stats.rx_bytes += can_frame->len;
550 netif_rx(skb);
551
552 return 0;
553}
554
555static int pcan_usb_pro_handle_error(struct pcan_usb_pro_interface *usb_if,
556 struct pcan_usb_pro_rxstatus *er)
557{
558 const u16 raw_status = le16_to_cpu(er->status);
559 const unsigned int ctrl_idx = (er->channel >> 4) & 0x0f;
560 struct peak_usb_device *dev = usb_if->dev[ctrl_idx];
561 struct net_device *netdev = dev->netdev;
562 struct can_frame *can_frame;
563 enum can_state new_state = CAN_STATE_ERROR_ACTIVE;
564 u8 err_mask = 0;
565 struct sk_buff *skb;
566 struct skb_shared_hwtstamps *hwts;
567
568
569 if (dev->can.state == CAN_STATE_BUS_OFF)
570 return 0;
571
572 if (!raw_status) {
573
574 dev->can.state = CAN_STATE_ERROR_ACTIVE;
575 return 0;
576 }
577
578 if (raw_status & (PCAN_USBPRO_STATUS_OVERRUN |
579 PCAN_USBPRO_STATUS_QOVERRUN)) {
580
581 new_state = CAN_STATE_MAX;
582 }
583
584 if (raw_status & PCAN_USBPRO_STATUS_BUS) {
585 new_state = CAN_STATE_BUS_OFF;
586 } else if (raw_status & PCAN_USBPRO_STATUS_ERROR) {
587 u32 rx_err_cnt = (le32_to_cpu(er->err_frm) & 0x00ff0000) >> 16;
588 u32 tx_err_cnt = (le32_to_cpu(er->err_frm) & 0xff000000) >> 24;
589
590 if (rx_err_cnt > 127)
591 err_mask |= CAN_ERR_CRTL_RX_PASSIVE;
592 else if (rx_err_cnt > 96)
593 err_mask |= CAN_ERR_CRTL_RX_WARNING;
594
595 if (tx_err_cnt > 127)
596 err_mask |= CAN_ERR_CRTL_TX_PASSIVE;
597 else if (tx_err_cnt > 96)
598 err_mask |= CAN_ERR_CRTL_TX_WARNING;
599
600 if (err_mask & (CAN_ERR_CRTL_RX_WARNING |
601 CAN_ERR_CRTL_TX_WARNING))
602 new_state = CAN_STATE_ERROR_WARNING;
603 else if (err_mask & (CAN_ERR_CRTL_RX_PASSIVE |
604 CAN_ERR_CRTL_TX_PASSIVE))
605 new_state = CAN_STATE_ERROR_PASSIVE;
606 }
607
608
609 if (dev->can.state == new_state)
610 return 0;
611
612
613 skb = alloc_can_err_skb(netdev, &can_frame);
614 if (!skb)
615 return -ENOMEM;
616
617 switch (new_state) {
618 case CAN_STATE_BUS_OFF:
619 can_frame->can_id |= CAN_ERR_BUSOFF;
620 dev->can.can_stats.bus_off++;
621 can_bus_off(netdev);
622 break;
623
624 case CAN_STATE_ERROR_PASSIVE:
625 can_frame->can_id |= CAN_ERR_CRTL;
626 can_frame->data[1] |= err_mask;
627 dev->can.can_stats.error_passive++;
628 break;
629
630 case CAN_STATE_ERROR_WARNING:
631 can_frame->can_id |= CAN_ERR_CRTL;
632 can_frame->data[1] |= err_mask;
633 dev->can.can_stats.error_warning++;
634 break;
635
636 case CAN_STATE_ERROR_ACTIVE:
637 break;
638
639 default:
640
641 if (raw_status & PCAN_USBPRO_STATUS_OVERRUN) {
642 can_frame->can_id |= CAN_ERR_PROT;
643 can_frame->data[2] |= CAN_ERR_PROT_OVERLOAD;
644 netdev->stats.rx_over_errors++;
645 netdev->stats.rx_errors++;
646 }
647
648 if (raw_status & PCAN_USBPRO_STATUS_QOVERRUN) {
649 can_frame->can_id |= CAN_ERR_CRTL;
650 can_frame->data[1] |= CAN_ERR_CRTL_RX_OVERFLOW;
651 netdev->stats.rx_over_errors++;
652 netdev->stats.rx_errors++;
653 }
654
655 new_state = CAN_STATE_ERROR_ACTIVE;
656 break;
657 }
658
659 dev->can.state = new_state;
660
661 hwts = skb_hwtstamps(skb);
662 peak_usb_get_ts_time(&usb_if->time_ref, le32_to_cpu(er->ts32), &hwts->hwtstamp);
663 netdev->stats.rx_packets++;
664 netdev->stats.rx_bytes += can_frame->len;
665 netif_rx(skb);
666
667 return 0;
668}
669
670static void pcan_usb_pro_handle_ts(struct pcan_usb_pro_interface *usb_if,
671 struct pcan_usb_pro_rxts *ts)
672{
673
674 if (usb_if->cm_ignore_count > 0)
675 usb_if->cm_ignore_count--;
676 else
677 peak_usb_set_ts_now(&usb_if->time_ref,
678 le32_to_cpu(ts->ts64[1]));
679}
680
681
682
683
684static int pcan_usb_pro_decode_buf(struct peak_usb_device *dev, struct urb *urb)
685{
686 struct pcan_usb_pro_interface *usb_if = pcan_usb_pro_dev_if(dev);
687 struct net_device *netdev = dev->netdev;
688 struct pcan_usb_pro_msg usb_msg;
689 u8 *rec_ptr, *msg_end;
690 u16 rec_cnt;
691 int err = 0;
692
693 rec_ptr = pcan_msg_init(&usb_msg, urb->transfer_buffer,
694 urb->actual_length);
695 if (!rec_ptr) {
696 netdev_err(netdev, "bad msg hdr len %d\n", urb->actual_length);
697 return -EINVAL;
698 }
699
700
701 msg_end = urb->transfer_buffer + urb->actual_length;
702 rec_cnt = le16_to_cpu(*usb_msg.u.rec_cnt_rd);
703 for (; rec_cnt > 0; rec_cnt--) {
704 union pcan_usb_pro_rec *pr = (union pcan_usb_pro_rec *)rec_ptr;
705 u16 sizeof_rec = pcan_usb_pro_sizeof_rec[pr->data_type];
706
707 if (!sizeof_rec) {
708 netdev_err(netdev,
709 "got unsupported rec in usb msg:\n");
710 err = -ENOTSUPP;
711 break;
712 }
713
714
715 if (rec_ptr + sizeof_rec > msg_end) {
716 netdev_err(netdev,
717 "got frag rec: should inc usb rx buf size\n");
718 err = -EBADMSG;
719 break;
720 }
721
722 switch (pr->data_type) {
723 case PCAN_USBPRO_RXMSG8:
724 case PCAN_USBPRO_RXMSG4:
725 case PCAN_USBPRO_RXMSG0:
726 case PCAN_USBPRO_RXRTR:
727 err = pcan_usb_pro_handle_canmsg(usb_if, &pr->rx_msg);
728 if (err < 0)
729 goto fail;
730 break;
731
732 case PCAN_USBPRO_RXSTATUS:
733 err = pcan_usb_pro_handle_error(usb_if, &pr->rx_status);
734 if (err < 0)
735 goto fail;
736 break;
737
738 case PCAN_USBPRO_RXTS:
739 pcan_usb_pro_handle_ts(usb_if, &pr->rx_ts);
740 break;
741
742 default:
743 netdev_err(netdev,
744 "unhandled rec type 0x%02x (%d): ignored\n",
745 pr->data_type, pr->data_type);
746 break;
747 }
748
749 rec_ptr += sizeof_rec;
750 }
751
752fail:
753 if (err)
754 pcan_dump_mem("received msg",
755 urb->transfer_buffer, urb->actual_length);
756
757 return err;
758}
759
760static int pcan_usb_pro_encode_msg(struct peak_usb_device *dev,
761 struct sk_buff *skb, u8 *obuf, size_t *size)
762{
763 struct can_frame *cf = (struct can_frame *)skb->data;
764 u8 data_type, len, flags;
765 struct pcan_usb_pro_msg usb_msg;
766
767 pcan_msg_init_empty(&usb_msg, obuf, *size);
768
769 if ((cf->can_id & CAN_RTR_FLAG) || (cf->len == 0))
770 data_type = PCAN_USBPRO_TXMSG0;
771 else if (cf->len <= 4)
772 data_type = PCAN_USBPRO_TXMSG4;
773 else
774 data_type = PCAN_USBPRO_TXMSG8;
775
776 len = (dev->ctrl_idx << 4) | (cf->len & 0x0f);
777
778 flags = 0;
779 if (cf->can_id & CAN_EFF_FLAG)
780 flags |= PCAN_USBPRO_EXT;
781 if (cf->can_id & CAN_RTR_FLAG)
782 flags |= PCAN_USBPRO_RTR;
783
784
785 if (dev->can.ctrlmode & CAN_CTRLMODE_ONE_SHOT)
786 flags |= PCAN_USBPRO_SS;
787
788 pcan_msg_add_rec(&usb_msg, data_type, 0, flags, len, cf->can_id,
789 cf->data);
790
791 *size = usb_msg.rec_buffer_len;
792
793 return 0;
794}
795
796static int pcan_usb_pro_start(struct peak_usb_device *dev)
797{
798 struct pcan_usb_pro_device *pdev =
799 container_of(dev, struct pcan_usb_pro_device, dev);
800 int err;
801
802 err = pcan_usb_pro_set_silent(dev,
803 dev->can.ctrlmode & CAN_CTRLMODE_LISTENONLY);
804 if (err)
805 return err;
806
807
808 err = pcan_usb_pro_set_filter(dev, 1);
809 if (err)
810 return err;
811
812
813 if (pdev->usb_if->dev_opened_count == 0) {
814
815 peak_usb_init_time_ref(&pdev->usb_if->time_ref, &pcan_usb_pro);
816
817
818 err = pcan_usb_pro_set_ts(dev, 1);
819 }
820
821 pdev->usb_if->dev_opened_count++;
822
823 return err;
824}
825
826
827
828
829
830static int pcan_usb_pro_stop(struct peak_usb_device *dev)
831{
832 struct pcan_usb_pro_device *pdev =
833 container_of(dev, struct pcan_usb_pro_device, dev);
834
835
836 if (pdev->usb_if->dev_opened_count == 1)
837 pcan_usb_pro_set_ts(dev, 0);
838
839 pdev->usb_if->dev_opened_count--;
840
841 return 0;
842}
843
844
845
846
847static int pcan_usb_pro_init(struct peak_usb_device *dev)
848{
849 struct pcan_usb_pro_device *pdev =
850 container_of(dev, struct pcan_usb_pro_device, dev);
851 struct pcan_usb_pro_interface *usb_if = NULL;
852 struct pcan_usb_pro_fwinfo *fi = NULL;
853 struct pcan_usb_pro_blinfo *bi = NULL;
854 int err;
855
856
857 if (!dev->prev_siblings) {
858
859 usb_if = kzalloc(sizeof(struct pcan_usb_pro_interface),
860 GFP_KERNEL);
861 fi = kmalloc(sizeof(struct pcan_usb_pro_fwinfo), GFP_KERNEL);
862 bi = kmalloc(sizeof(struct pcan_usb_pro_blinfo), GFP_KERNEL);
863 if (!usb_if || !fi || !bi) {
864 err = -ENOMEM;
865 goto err_out;
866 }
867
868
869 usb_if->cm_ignore_count = 5;
870
871
872
873
874
875
876 err = pcan_usb_pro_send_req(dev, PCAN_USBPRO_REQ_INFO,
877 PCAN_USBPRO_INFO_FW,
878 fi, sizeof(*fi));
879 if (err) {
880 dev_err(dev->netdev->dev.parent,
881 "unable to read %s firmware info (err %d)\n",
882 pcan_usb_pro.name, err);
883 goto err_out;
884 }
885
886 err = pcan_usb_pro_send_req(dev, PCAN_USBPRO_REQ_INFO,
887 PCAN_USBPRO_INFO_BL,
888 bi, sizeof(*bi));
889 if (err) {
890 dev_err(dev->netdev->dev.parent,
891 "unable to read %s bootloader info (err %d)\n",
892 pcan_usb_pro.name, err);
893 goto err_out;
894 }
895
896
897 err = pcan_usb_pro_drv_loaded(dev, 1);
898 if (err)
899 goto err_out;
900
901 dev_info(dev->netdev->dev.parent,
902 "PEAK-System %s hwrev %u serial %08X.%08X (%u channels)\n",
903 pcan_usb_pro.name,
904 bi->hw_rev, bi->serial_num_hi, bi->serial_num_lo,
905 pcan_usb_pro.ctrl_count);
906 } else {
907 usb_if = pcan_usb_pro_dev_if(dev->prev_siblings);
908 }
909
910 pdev->usb_if = usb_if;
911 usb_if->dev[dev->ctrl_idx] = dev;
912
913
914 pcan_usb_pro_set_led(dev, PCAN_USBPRO_LED_DEVICE, 1);
915
916 kfree(bi);
917 kfree(fi);
918
919 return 0;
920
921 err_out:
922 kfree(bi);
923 kfree(fi);
924 kfree(usb_if);
925
926 return err;
927}
928
929static void pcan_usb_pro_exit(struct peak_usb_device *dev)
930{
931 struct pcan_usb_pro_device *pdev =
932 container_of(dev, struct pcan_usb_pro_device, dev);
933
934
935
936
937
938 if (dev->can.state != CAN_STATE_STOPPED) {
939
940 pcan_usb_pro_set_bus(dev, 0);
941 }
942
943
944 if (dev->ctrl_idx == 0) {
945
946 if (pdev->usb_if->dev_opened_count > 0)
947 pcan_usb_pro_set_ts(dev, 0);
948
949
950 pcan_usb_pro_drv_loaded(dev, 0);
951 }
952}
953
954
955
956
957static void pcan_usb_pro_free(struct peak_usb_device *dev)
958{
959
960 if (!dev->prev_siblings && !dev->next_siblings)
961 kfree(pcan_usb_pro_dev_if(dev));
962}
963
964
965
966
967int pcan_usb_pro_probe(struct usb_interface *intf)
968{
969 struct usb_host_interface *if_desc;
970 int i;
971
972 if_desc = intf->altsetting;
973
974
975 for (i = 0; i < if_desc->desc.bNumEndpoints; i++) {
976 struct usb_endpoint_descriptor *ep = &if_desc->endpoint[i].desc;
977
978
979
980
981
982 switch (ep->bEndpointAddress) {
983 case PCAN_USBPRO_EP_CMDOUT:
984 case PCAN_USBPRO_EP_CMDIN:
985 case PCAN_USBPRO_EP_MSGOUT_0:
986 case PCAN_USBPRO_EP_MSGOUT_1:
987 case PCAN_USBPRO_EP_MSGIN:
988 case PCAN_USBPRO_EP_UNUSED:
989 break;
990 default:
991 return -ENODEV;
992 }
993 }
994
995 return 0;
996}
997
998static int pcan_usb_pro_set_phys_id(struct net_device *netdev,
999 enum ethtool_phys_id_state state)
1000{
1001 struct peak_usb_device *dev = netdev_priv(netdev);
1002 int err = 0;
1003
1004 switch (state) {
1005 case ETHTOOL_ID_ACTIVE:
1006
1007 err = pcan_usb_pro_set_led(dev, PCAN_USBPRO_LED_BLINK_FAST,
1008 0xffffffff);
1009 break;
1010
1011 case ETHTOOL_ID_INACTIVE:
1012
1013 err = pcan_usb_pro_set_led(dev, PCAN_USBPRO_LED_DEVICE, 1);
1014 break;
1015
1016 default:
1017 break;
1018 }
1019
1020 return err;
1021}
1022
1023static const struct ethtool_ops pcan_usb_pro_ethtool_ops = {
1024 .set_phys_id = pcan_usb_pro_set_phys_id,
1025};
1026
1027
1028
1029
1030static const struct can_bittiming_const pcan_usb_pro_const = {
1031 .name = "pcan_usb_pro",
1032 .tseg1_min = 1,
1033 .tseg1_max = 16,
1034 .tseg2_min = 1,
1035 .tseg2_max = 8,
1036 .sjw_max = 4,
1037 .brp_min = 1,
1038 .brp_max = 1024,
1039 .brp_inc = 1,
1040};
1041
1042const struct peak_usb_adapter pcan_usb_pro = {
1043 .name = "PCAN-USB Pro",
1044 .device_id = PCAN_USBPRO_PRODUCT_ID,
1045 .ctrl_count = PCAN_USBPRO_CHANNEL_COUNT,
1046 .ctrlmode_supported = CAN_CTRLMODE_3_SAMPLES | CAN_CTRLMODE_LISTENONLY |
1047 CAN_CTRLMODE_ONE_SHOT,
1048 .clock = {
1049 .freq = PCAN_USBPRO_CRYSTAL_HZ,
1050 },
1051 .bittiming_const = &pcan_usb_pro_const,
1052
1053
1054 .sizeof_dev_private = sizeof(struct pcan_usb_pro_device),
1055
1056 .ethtool_ops = &pcan_usb_pro_ethtool_ops,
1057
1058
1059 .ts_used_bits = 32,
1060 .us_per_ts_scale = 1,
1061 .us_per_ts_shift = 0,
1062
1063
1064 .ep_msg_in = PCAN_USBPRO_EP_MSGIN,
1065 .ep_msg_out = {PCAN_USBPRO_EP_MSGOUT_0, PCAN_USBPRO_EP_MSGOUT_1},
1066
1067
1068 .rx_buffer_size = PCAN_USBPRO_RX_BUFFER_SIZE,
1069 .tx_buffer_size = PCAN_USBPRO_TX_BUFFER_SIZE,
1070
1071
1072 .intf_probe = pcan_usb_pro_probe,
1073 .dev_init = pcan_usb_pro_init,
1074 .dev_exit = pcan_usb_pro_exit,
1075 .dev_free = pcan_usb_pro_free,
1076 .dev_set_bus = pcan_usb_pro_set_bus,
1077 .dev_set_bittiming = pcan_usb_pro_set_bittiming,
1078 .dev_get_device_id = pcan_usb_pro_get_device_id,
1079 .dev_decode_buf = pcan_usb_pro_decode_buf,
1080 .dev_encode_msg = pcan_usb_pro_encode_msg,
1081 .dev_start = pcan_usb_pro_start,
1082 .dev_stop = pcan_usb_pro_stop,
1083 .dev_restart_async = pcan_usb_pro_restart_async,
1084};
1085
