2 * CAN driver for PEAK System PCAN-USB Pro adapter
3 * Derived from the PCAN project file driver/src/pcan_usbpro.c
5 * Copyright (C) 2003-2011 PEAK System-Technik GmbH
6 * Copyright (C) 2011-2012 Stephane Grosjean <s.grosjean@peak-system.com>
8 * This program is free software; you can redistribute it and/or modify it
9 * under the terms of the GNU General Public License as published
10 * by the Free Software Foundation; version 2 of the License.
12 * This program is distributed in the hope that it will be useful, but
13 * WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * General Public License for more details.
17 #include <linux/netdevice.h>
18 #include <linux/usb.h>
19 #include <linux/module.h>
21 #include <linux/can.h>
22 #include <linux/can/dev.h>
23 #include <linux/can/error.h>
25 #include "pcan_usb_core.h"
26 #include "pcan_usb_pro.h"
28 MODULE_SUPPORTED_DEVICE("PEAK-System PCAN-USB Pro adapter");
30 #define PCAN_USBPRO_CHANNEL_COUNT 2
32 /* PCAN-USB Pro adapter internal clock (MHz) */
33 #define PCAN_USBPRO_CRYSTAL_HZ 56000000
35 /* PCAN-USB Pro command timeout (ms.) */
36 #define PCAN_USBPRO_COMMAND_TIMEOUT 1000
38 /* PCAN-USB Pro rx/tx buffers size */
39 #define PCAN_USBPRO_RX_BUFFER_SIZE 1024
40 #define PCAN_USBPRO_TX_BUFFER_SIZE 64
42 #define PCAN_USBPRO_MSG_HEADER_LEN 4
44 /* some commands responses need to be re-submitted */
45 #define PCAN_USBPRO_RSP_SUBMIT_MAX 2
47 #define PCAN_USBPRO_RTR 0x01
48 #define PCAN_USBPRO_EXT 0x02
50 #define PCAN_USBPRO_CMD_BUFFER_SIZE 512
52 /* handle device specific info used by the netdevices */
53 struct pcan_usb_pro_interface {
54 struct peak_usb_device *dev[PCAN_USBPRO_CHANNEL_COUNT];
55 struct peak_time_ref time_ref;
60 /* device information */
61 struct pcan_usb_pro_device {
62 struct peak_usb_device dev;
63 struct pcan_usb_pro_interface *usb_if;
67 /* internal structure used to handle messages sent to bulk urb */
68 struct pcan_usb_pro_msg {
79 /* records sizes table indexed on message id. (8-bits value) */
80 static u16 pcan_usb_pro_sizeof_rec[256] = {
81 [PCAN_USBPRO_SETBTR] = sizeof(struct pcan_usb_pro_btr),
82 [PCAN_USBPRO_SETBUSACT] = sizeof(struct pcan_usb_pro_busact),
83 [PCAN_USBPRO_SETSILENT] = sizeof(struct pcan_usb_pro_silent),
84 [PCAN_USBPRO_SETFILTR] = sizeof(struct pcan_usb_pro_filter),
85 [PCAN_USBPRO_SETTS] = sizeof(struct pcan_usb_pro_setts),
86 [PCAN_USBPRO_GETDEVID] = sizeof(struct pcan_usb_pro_devid),
87 [PCAN_USBPRO_SETLED] = sizeof(struct pcan_usb_pro_setled),
88 [PCAN_USBPRO_RXMSG8] = sizeof(struct pcan_usb_pro_rxmsg),
89 [PCAN_USBPRO_RXMSG4] = sizeof(struct pcan_usb_pro_rxmsg) - 4,
90 [PCAN_USBPRO_RXMSG0] = sizeof(struct pcan_usb_pro_rxmsg) - 8,
91 [PCAN_USBPRO_RXRTR] = sizeof(struct pcan_usb_pro_rxmsg) - 8,
92 [PCAN_USBPRO_RXSTATUS] = sizeof(struct pcan_usb_pro_rxstatus),
93 [PCAN_USBPRO_RXTS] = sizeof(struct pcan_usb_pro_rxts),
94 [PCAN_USBPRO_TXMSG8] = sizeof(struct pcan_usb_pro_txmsg),
95 [PCAN_USBPRO_TXMSG4] = sizeof(struct pcan_usb_pro_txmsg) - 4,
96 [PCAN_USBPRO_TXMSG0] = sizeof(struct pcan_usb_pro_txmsg) - 8,
100 * initialize PCAN-USB Pro message data structure
102 static u8 *pcan_msg_init(struct pcan_usb_pro_msg *pm, void *buffer_addr,
105 if (buffer_size < PCAN_USBPRO_MSG_HEADER_LEN)
108 pm->u.rec_buffer = (u8 *)buffer_addr;
109 pm->rec_buffer_size = pm->rec_buffer_len = buffer_size;
110 pm->rec_ptr = pm->u.rec_buffer + PCAN_USBPRO_MSG_HEADER_LEN;
115 static u8 *pcan_msg_init_empty(struct pcan_usb_pro_msg *pm,
116 void *buffer_addr, int buffer_size)
118 u8 *pr = pcan_msg_init(pm, buffer_addr, buffer_size);
121 pm->rec_buffer_len = PCAN_USBPRO_MSG_HEADER_LEN;
128 * add one record to a message being built
130 static int pcan_msg_add_rec(struct pcan_usb_pro_msg *pm, u8 id, ...)
138 pc = pm->rec_ptr + 1;
142 case PCAN_USBPRO_TXMSG8:
145 case PCAN_USBPRO_TXMSG4:
148 case PCAN_USBPRO_TXMSG0:
149 *pc++ = va_arg(ap, int);
150 *pc++ = va_arg(ap, int);
151 *pc++ = va_arg(ap, int);
152 *(__le32 *)pc = cpu_to_le32(va_arg(ap, u32));
154 memcpy(pc, va_arg(ap, int *), i);
158 case PCAN_USBPRO_SETBTR:
159 case PCAN_USBPRO_GETDEVID:
160 *pc++ = va_arg(ap, int);
162 *(__le32 *)pc = cpu_to_le32(va_arg(ap, u32));
166 case PCAN_USBPRO_SETFILTR:
167 case PCAN_USBPRO_SETBUSACT:
168 case PCAN_USBPRO_SETSILENT:
169 *pc++ = va_arg(ap, int);
170 *(__le16 *)pc = cpu_to_le16(va_arg(ap, int));
174 case PCAN_USBPRO_SETLED:
175 *pc++ = va_arg(ap, int);
176 *(__le16 *)pc = cpu_to_le16(va_arg(ap, int));
178 *(__le32 *)pc = cpu_to_le32(va_arg(ap, u32));
182 case PCAN_USBPRO_SETTS:
184 *(__le16 *)pc = cpu_to_le16(va_arg(ap, int));
189 pr_err("%s: %s(): unknown data type %02Xh (%d)\n",
190 PCAN_USB_DRIVER_NAME, __func__, id, id);
195 len = pc - pm->rec_ptr;
197 *pm->u.rec_cnt = cpu_to_le32(le32_to_cpu(*pm->u.rec_cnt) + 1);
201 pm->rec_buffer_len += len;
210 * send PCAN-USB Pro command synchronously
212 static int pcan_usb_pro_send_cmd(struct peak_usb_device *dev,
213 struct pcan_usb_pro_msg *pum)
218 /* usb device unregistered? */
219 if (!(dev->state & PCAN_USB_STATE_CONNECTED))
222 err = usb_bulk_msg(dev->udev,
223 usb_sndbulkpipe(dev->udev, PCAN_USBPRO_EP_CMDOUT),
224 pum->u.rec_buffer, pum->rec_buffer_len,
225 &actual_length, PCAN_USBPRO_COMMAND_TIMEOUT);
227 netdev_err(dev->netdev, "sending command failure: %d\n", err);
233 * wait for PCAN-USB Pro command response
235 static int pcan_usb_pro_wait_rsp(struct peak_usb_device *dev,
236 struct pcan_usb_pro_msg *pum)
238 u8 req_data_type, req_channel;
242 /* usb device unregistered? */
243 if (!(dev->state & PCAN_USB_STATE_CONNECTED))
246 req_data_type = pum->u.rec_buffer[4];
247 req_channel = pum->u.rec_buffer[5];
250 for (i = 0; !err && i < PCAN_USBPRO_RSP_SUBMIT_MAX; i++) {
251 struct pcan_usb_pro_msg rsp;
252 union pcan_usb_pro_rec *pr;
257 err = usb_bulk_msg(dev->udev,
258 usb_rcvbulkpipe(dev->udev, PCAN_USBPRO_EP_CMDIN),
259 pum->u.rec_buffer, pum->rec_buffer_len,
260 &actual_length, PCAN_USBPRO_COMMAND_TIMEOUT);
262 netdev_err(dev->netdev, "waiting rsp error %d\n", err);
266 if (actual_length == 0)
270 if (actual_length < PCAN_USBPRO_MSG_HEADER_LEN) {
271 netdev_err(dev->netdev,
272 "got abnormal too small rsp (len=%d)\n",
277 pc = pcan_msg_init(&rsp, pum->u.rec_buffer,
280 rec_cnt = le32_to_cpu(*rsp.u.rec_cnt);
282 /* loop on records stored into message */
283 for (r = 0; r < rec_cnt; r++) {
284 pr = (union pcan_usb_pro_rec *)pc;
285 rec_len = pcan_usb_pro_sizeof_rec[pr->data_type];
287 netdev_err(dev->netdev,
288 "got unprocessed record in msg\n");
289 pcan_dump_mem("rcvd rsp msg", pum->u.rec_buffer,
294 /* check if response corresponds to request */
295 if (pr->data_type != req_data_type)
296 netdev_err(dev->netdev,
297 "got unwanted rsp %xh: ignored\n",
300 /* check if channel in response corresponds too */
301 else if ((req_channel != 0xff) && \
302 (pr->bus_act.channel != req_channel))
303 netdev_err(dev->netdev,
304 "got rsp %xh but on chan%u: ignored\n",
305 req_data_type, pr->bus_act.channel);
307 /* got the response */
311 /* otherwise, go on with next record in message */
316 return (i >= PCAN_USBPRO_RSP_SUBMIT_MAX) ? -ERANGE : err;
319 int pcan_usb_pro_send_req(struct peak_usb_device *dev, int req_id,
320 int req_value, void *req_addr, int req_size)
326 /* usb device unregistered? */
327 if (!(dev->state & PCAN_USB_STATE_CONNECTED))
330 req_type = USB_TYPE_VENDOR | USB_RECIP_OTHER;
333 case PCAN_USBPRO_REQ_FCT:
334 p = usb_sndctrlpipe(dev->udev, 0);
338 p = usb_rcvctrlpipe(dev->udev, 0);
339 req_type |= USB_DIR_IN;
340 memset(req_addr, '\0', req_size);
344 err = usb_control_msg(dev->udev, p, req_id, req_type, req_value, 0,
345 req_addr, req_size, 2 * USB_CTRL_GET_TIMEOUT);
347 netdev_info(dev->netdev,
348 "unable to request usb[type=%d value=%d] err=%d\n",
349 req_id, req_value, err);
356 static int pcan_usb_pro_set_ts(struct peak_usb_device *dev, u16 onoff)
358 struct pcan_usb_pro_msg um;
360 pcan_msg_init_empty(&um, dev->cmd_buf, PCAN_USB_MAX_CMD_LEN);
361 pcan_msg_add_rec(&um, PCAN_USBPRO_SETTS, onoff);
363 return pcan_usb_pro_send_cmd(dev, &um);
366 static int pcan_usb_pro_set_bitrate(struct peak_usb_device *dev, u32 ccbt)
368 struct pcan_usb_pro_device *pdev =
369 container_of(dev, struct pcan_usb_pro_device, dev);
370 struct pcan_usb_pro_msg um;
372 pcan_msg_init_empty(&um, dev->cmd_buf, PCAN_USB_MAX_CMD_LEN);
373 pcan_msg_add_rec(&um, PCAN_USBPRO_SETBTR, dev->ctrl_idx, ccbt);
375 /* cache the CCBT value to reuse it before next buson */
376 pdev->cached_ccbt = ccbt;
378 return pcan_usb_pro_send_cmd(dev, &um);
381 static int pcan_usb_pro_set_bus(struct peak_usb_device *dev, u8 onoff)
383 struct pcan_usb_pro_msg um;
385 /* if bus=on, be sure the bitrate being set before! */
387 struct pcan_usb_pro_device *pdev =
388 container_of(dev, struct pcan_usb_pro_device, dev);
390 pcan_usb_pro_set_bitrate(dev, pdev->cached_ccbt);
393 pcan_msg_init_empty(&um, dev->cmd_buf, PCAN_USB_MAX_CMD_LEN);
394 pcan_msg_add_rec(&um, PCAN_USBPRO_SETBUSACT, dev->ctrl_idx, onoff);
396 return pcan_usb_pro_send_cmd(dev, &um);
399 static int pcan_usb_pro_set_silent(struct peak_usb_device *dev, u8 onoff)
401 struct pcan_usb_pro_msg um;
403 pcan_msg_init_empty(&um, dev->cmd_buf, PCAN_USB_MAX_CMD_LEN);
404 pcan_msg_add_rec(&um, PCAN_USBPRO_SETSILENT, dev->ctrl_idx, onoff);
406 return pcan_usb_pro_send_cmd(dev, &um);
409 static int pcan_usb_pro_set_filter(struct peak_usb_device *dev, u16 filter_mode)
411 struct pcan_usb_pro_msg um;
413 pcan_msg_init_empty(&um, dev->cmd_buf, PCAN_USB_MAX_CMD_LEN);
414 pcan_msg_add_rec(&um, PCAN_USBPRO_SETFILTR, dev->ctrl_idx, filter_mode);
416 return pcan_usb_pro_send_cmd(dev, &um);
419 static int pcan_usb_pro_set_led(struct peak_usb_device *dev, u8 mode,
422 struct pcan_usb_pro_msg um;
424 pcan_msg_init_empty(&um, dev->cmd_buf, PCAN_USB_MAX_CMD_LEN);
425 pcan_msg_add_rec(&um, PCAN_USBPRO_SETLED, dev->ctrl_idx, mode, timeout);
427 return pcan_usb_pro_send_cmd(dev, &um);
430 static int pcan_usb_pro_get_device_id(struct peak_usb_device *dev,
433 struct pcan_usb_pro_devid *pdn;
434 struct pcan_usb_pro_msg um;
438 pc = pcan_msg_init_empty(&um, dev->cmd_buf, PCAN_USB_MAX_CMD_LEN);
439 pcan_msg_add_rec(&um, PCAN_USBPRO_GETDEVID, dev->ctrl_idx);
441 err = pcan_usb_pro_send_cmd(dev, &um);
445 err = pcan_usb_pro_wait_rsp(dev, &um);
449 pdn = (struct pcan_usb_pro_devid *)pc;
451 *device_id = le32_to_cpu(pdn->serial_num);
456 static int pcan_usb_pro_set_bittiming(struct peak_usb_device *dev,
457 struct can_bittiming *bt)
461 ccbt = (dev->can.ctrlmode & CAN_CTRLMODE_3_SAMPLES) ? 0x00800000 : 0;
462 ccbt |= (bt->sjw - 1) << 24;
463 ccbt |= (bt->phase_seg2 - 1) << 20;
464 ccbt |= (bt->prop_seg + bt->phase_seg1 - 1) << 16; /* = tseg1 */
467 netdev_info(dev->netdev, "setting ccbt=0x%08x\n", ccbt);
469 return pcan_usb_pro_set_bitrate(dev, ccbt);
472 void pcan_usb_pro_restart_complete(struct urb *urb)
474 /* can delete usb resources */
475 peak_usb_async_complete(urb);
477 /* notify candev and netdev */
478 peak_usb_restart_complete(urb->context);
482 * handle restart but in asynchronously way
484 static int pcan_usb_pro_restart_async(struct peak_usb_device *dev,
485 struct urb *urb, u8 *buf)
487 struct pcan_usb_pro_msg um;
489 pcan_msg_init_empty(&um, buf, PCAN_USB_MAX_CMD_LEN);
490 pcan_msg_add_rec(&um, PCAN_USBPRO_SETBUSACT, dev->ctrl_idx, 1);
492 usb_fill_bulk_urb(urb, dev->udev,
493 usb_sndbulkpipe(dev->udev, PCAN_USBPRO_EP_CMDOUT),
494 buf, PCAN_USB_MAX_CMD_LEN,
495 pcan_usb_pro_restart_complete, dev);
497 return usb_submit_urb(urb, GFP_ATOMIC);
500 static int pcan_usb_pro_drv_loaded(struct peak_usb_device *dev, int loaded)
505 buffer = kzalloc(PCAN_USBPRO_FCT_DRVLD_REQ_LEN, GFP_KERNEL);
510 buffer[1] = !!loaded;
512 err = pcan_usb_pro_send_req(dev, PCAN_USBPRO_REQ_FCT,
513 PCAN_USBPRO_FCT_DRVLD, buffer,
514 PCAN_USBPRO_FCT_DRVLD_REQ_LEN);
521 struct pcan_usb_pro_interface *pcan_usb_pro_dev_if(struct peak_usb_device *dev)
523 struct pcan_usb_pro_device *pdev =
524 container_of(dev, struct pcan_usb_pro_device, dev);
528 static int pcan_usb_pro_handle_canmsg(struct pcan_usb_pro_interface *usb_if,
529 struct pcan_usb_pro_rxmsg *rx)
531 const unsigned int ctrl_idx = (rx->len >> 4) & 0x0f;
532 struct peak_usb_device *dev = usb_if->dev[ctrl_idx];
533 struct net_device *netdev = dev->netdev;
534 struct can_frame *can_frame;
536 struct skb_shared_hwtstamps *hwts;
538 skb = alloc_can_skb(netdev, &can_frame);
542 can_frame->can_id = le32_to_cpu(rx->id);
543 can_frame->can_dlc = rx->len & 0x0f;
545 if (rx->flags & PCAN_USBPRO_EXT)
546 can_frame->can_id |= CAN_EFF_FLAG;
548 if (rx->flags & PCAN_USBPRO_RTR)
549 can_frame->can_id |= CAN_RTR_FLAG;
551 memcpy(can_frame->data, rx->data, can_frame->can_dlc);
553 hwts = skb_hwtstamps(skb);
554 peak_usb_get_ts_time(&usb_if->time_ref, le32_to_cpu(rx->ts32),
557 netdev->stats.rx_packets++;
558 netdev->stats.rx_bytes += can_frame->can_dlc;
564 static int pcan_usb_pro_handle_error(struct pcan_usb_pro_interface *usb_if,
565 struct pcan_usb_pro_rxstatus *er)
567 const u16 raw_status = le16_to_cpu(er->status);
568 const unsigned int ctrl_idx = (er->channel >> 4) & 0x0f;
569 struct peak_usb_device *dev = usb_if->dev[ctrl_idx];
570 struct net_device *netdev = dev->netdev;
571 struct can_frame *can_frame;
572 enum can_state new_state = CAN_STATE_ERROR_ACTIVE;
575 struct skb_shared_hwtstamps *hwts;
577 /* nothing should be sent while in BUS_OFF state */
578 if (dev->can.state == CAN_STATE_BUS_OFF)
582 /* no error bit (back to active state) */
583 dev->can.state = CAN_STATE_ERROR_ACTIVE;
587 if (raw_status & (PCAN_USBPRO_STATUS_OVERRUN |
588 PCAN_USBPRO_STATUS_QOVERRUN)) {
589 /* trick to bypass next comparison and process other errors */
590 new_state = CAN_STATE_MAX;
593 if (raw_status & PCAN_USBPRO_STATUS_BUS) {
594 new_state = CAN_STATE_BUS_OFF;
595 } else if (raw_status & PCAN_USBPRO_STATUS_ERROR) {
596 u32 rx_err_cnt = (le32_to_cpu(er->err_frm) & 0x00ff0000) >> 16;
597 u32 tx_err_cnt = (le32_to_cpu(er->err_frm) & 0xff000000) >> 24;
599 if (rx_err_cnt > 127)
600 err_mask |= CAN_ERR_CRTL_RX_PASSIVE;
601 else if (rx_err_cnt > 96)
602 err_mask |= CAN_ERR_CRTL_RX_WARNING;
604 if (tx_err_cnt > 127)
605 err_mask |= CAN_ERR_CRTL_TX_PASSIVE;
606 else if (tx_err_cnt > 96)
607 err_mask |= CAN_ERR_CRTL_TX_WARNING;
609 if (err_mask & (CAN_ERR_CRTL_RX_WARNING |
610 CAN_ERR_CRTL_TX_WARNING))
611 new_state = CAN_STATE_ERROR_WARNING;
612 else if (err_mask & (CAN_ERR_CRTL_RX_PASSIVE |
613 CAN_ERR_CRTL_TX_PASSIVE))
614 new_state = CAN_STATE_ERROR_PASSIVE;
617 /* donot post any error if current state didn't change */
618 if (dev->can.state == new_state)
621 /* allocate an skb to store the error frame */
622 skb = alloc_can_err_skb(netdev, &can_frame);
627 case CAN_STATE_BUS_OFF:
628 can_frame->can_id |= CAN_ERR_BUSOFF;
629 dev->can.can_stats.bus_off++;
633 case CAN_STATE_ERROR_PASSIVE:
634 can_frame->can_id |= CAN_ERR_CRTL;
635 can_frame->data[1] |= err_mask;
636 dev->can.can_stats.error_passive++;
639 case CAN_STATE_ERROR_WARNING:
640 can_frame->can_id |= CAN_ERR_CRTL;
641 can_frame->data[1] |= err_mask;
642 dev->can.can_stats.error_warning++;
645 case CAN_STATE_ERROR_ACTIVE:
649 /* CAN_STATE_MAX (trick to handle other errors) */
650 if (raw_status & PCAN_USBPRO_STATUS_OVERRUN) {
651 can_frame->can_id |= CAN_ERR_PROT;
652 can_frame->data[2] |= CAN_ERR_PROT_OVERLOAD;
653 netdev->stats.rx_over_errors++;
654 netdev->stats.rx_errors++;
657 if (raw_status & PCAN_USBPRO_STATUS_QOVERRUN) {
658 can_frame->can_id |= CAN_ERR_CRTL;
659 can_frame->data[1] |= CAN_ERR_CRTL_RX_OVERFLOW;
660 netdev->stats.rx_over_errors++;
661 netdev->stats.rx_errors++;
664 new_state = CAN_STATE_ERROR_ACTIVE;
668 dev->can.state = new_state;
670 hwts = skb_hwtstamps(skb);
671 peak_usb_get_ts_time(&usb_if->time_ref, le32_to_cpu(er->ts32), &hwts->hwtstamp);
672 netdev->stats.rx_packets++;
673 netdev->stats.rx_bytes += can_frame->can_dlc;
679 static void pcan_usb_pro_handle_ts(struct pcan_usb_pro_interface *usb_if,
680 struct pcan_usb_pro_rxts *ts)
682 /* should wait until clock is stabilized */
683 if (usb_if->cm_ignore_count > 0)
684 usb_if->cm_ignore_count--;
686 peak_usb_set_ts_now(&usb_if->time_ref,
687 le32_to_cpu(ts->ts64[1]));
691 * callback for bulk IN urb
693 static int pcan_usb_pro_decode_buf(struct peak_usb_device *dev, struct urb *urb)
695 struct pcan_usb_pro_interface *usb_if = pcan_usb_pro_dev_if(dev);
696 struct net_device *netdev = dev->netdev;
697 struct pcan_usb_pro_msg usb_msg;
698 u8 *rec_ptr, *msg_end;
702 rec_ptr = pcan_msg_init(&usb_msg, urb->transfer_buffer,
705 netdev_err(netdev, "bad msg hdr len %d\n", urb->actual_length);
709 /* loop reading all the records from the incoming message */
710 msg_end = urb->transfer_buffer + urb->actual_length;
711 rec_cnt = le16_to_cpu(*usb_msg.u.rec_cnt_rd);
712 for (; rec_cnt > 0; rec_cnt--) {
713 union pcan_usb_pro_rec *pr = (union pcan_usb_pro_rec *)rec_ptr;
714 u16 sizeof_rec = pcan_usb_pro_sizeof_rec[pr->data_type];
718 "got unsupported rec in usb msg:\n");
723 /* check if the record goes out of current packet */
724 if (rec_ptr + sizeof_rec > msg_end) {
726 "got frag rec: should inc usb rx buf size\n");
731 switch (pr->data_type) {
732 case PCAN_USBPRO_RXMSG8:
733 case PCAN_USBPRO_RXMSG4:
734 case PCAN_USBPRO_RXMSG0:
735 case PCAN_USBPRO_RXRTR:
736 err = pcan_usb_pro_handle_canmsg(usb_if, &pr->rx_msg);
741 case PCAN_USBPRO_RXSTATUS:
742 err = pcan_usb_pro_handle_error(usb_if, &pr->rx_status);
747 case PCAN_USBPRO_RXTS:
748 pcan_usb_pro_handle_ts(usb_if, &pr->rx_ts);
753 "unhandled rec type 0x%02x (%d): ignored\n",
754 pr->data_type, pr->data_type);
758 rec_ptr += sizeof_rec;
763 pcan_dump_mem("received msg",
764 urb->transfer_buffer, urb->actual_length);
769 static int pcan_usb_pro_encode_msg(struct peak_usb_device *dev,
770 struct sk_buff *skb, u8 *obuf, size_t *size)
772 struct can_frame *cf = (struct can_frame *)skb->data;
773 u8 data_type, len, flags;
774 struct pcan_usb_pro_msg usb_msg;
776 pcan_msg_init_empty(&usb_msg, obuf, *size);
778 if ((cf->can_id & CAN_RTR_FLAG) || (cf->can_dlc == 0))
779 data_type = PCAN_USBPRO_TXMSG0;
780 else if (cf->can_dlc <= 4)
781 data_type = PCAN_USBPRO_TXMSG4;
783 data_type = PCAN_USBPRO_TXMSG8;
785 len = (dev->ctrl_idx << 4) | (cf->can_dlc & 0x0f);
788 if (cf->can_id & CAN_EFF_FLAG)
790 if (cf->can_id & CAN_RTR_FLAG)
793 pcan_msg_add_rec(&usb_msg, data_type, 0, flags, len, cf->can_id,
796 *size = usb_msg.rec_buffer_len;
801 static int pcan_usb_pro_start(struct peak_usb_device *dev)
803 struct pcan_usb_pro_device *pdev =
804 container_of(dev, struct pcan_usb_pro_device, dev);
807 err = pcan_usb_pro_set_silent(dev,
808 dev->can.ctrlmode & CAN_CTRLMODE_LISTENONLY);
812 /* filter mode: 0-> All OFF; 1->bypass */
813 err = pcan_usb_pro_set_filter(dev, 1);
817 /* opening first device: */
818 if (pdev->usb_if->dev_opened_count == 0) {
820 peak_usb_init_time_ref(&pdev->usb_if->time_ref, &pcan_usb_pro);
822 /* ask device to send ts messages */
823 err = pcan_usb_pro_set_ts(dev, 1);
826 pdev->usb_if->dev_opened_count++;
833 * (last chance before set bus off)
835 static int pcan_usb_pro_stop(struct peak_usb_device *dev)
837 struct pcan_usb_pro_device *pdev =
838 container_of(dev, struct pcan_usb_pro_device, dev);
840 /* turn off ts msgs for that interface if no other dev opened */
841 if (pdev->usb_if->dev_opened_count == 1)
842 pcan_usb_pro_set_ts(dev, 0);
844 pdev->usb_if->dev_opened_count--;
850 * called when probing to initialize a device object.
852 static int pcan_usb_pro_init(struct peak_usb_device *dev)
854 struct pcan_usb_pro_device *pdev =
855 container_of(dev, struct pcan_usb_pro_device, dev);
856 struct pcan_usb_pro_interface *usb_if = NULL;
857 struct pcan_usb_pro_fwinfo *fi = NULL;
858 struct pcan_usb_pro_blinfo *bi = NULL;
861 /* do this for 1st channel only */
862 if (!dev->prev_siblings) {
863 /* allocate netdevices common structure attached to first one */
864 usb_if = kzalloc(sizeof(struct pcan_usb_pro_interface),
866 fi = kmalloc(sizeof(struct pcan_usb_pro_fwinfo), GFP_KERNEL);
867 bi = kmalloc(sizeof(struct pcan_usb_pro_blinfo), GFP_KERNEL);
868 if (!usb_if || !fi || !bi) {
873 /* number of ts msgs to ignore before taking one into account */
874 usb_if->cm_ignore_count = 5;
877 * explicit use of dev_xxx() instead of netdev_xxx() here:
878 * information displayed are related to the device itself, not
879 * to the canx netdevices.
881 err = pcan_usb_pro_send_req(dev, PCAN_USBPRO_REQ_INFO,
885 dev_err(dev->netdev->dev.parent,
886 "unable to read %s firmware info (err %d)\n",
887 pcan_usb_pro.name, err);
891 err = pcan_usb_pro_send_req(dev, PCAN_USBPRO_REQ_INFO,
895 dev_err(dev->netdev->dev.parent,
896 "unable to read %s bootloader info (err %d)\n",
897 pcan_usb_pro.name, err);
901 /* tell the device the can driver is running */
902 err = pcan_usb_pro_drv_loaded(dev, 1);
906 dev_info(dev->netdev->dev.parent,
907 "PEAK-System %s hwrev %u serial %08X.%08X (%u channels)\n",
909 bi->hw_rev, bi->serial_num_hi, bi->serial_num_lo,
910 pcan_usb_pro.ctrl_count);
912 usb_if = pcan_usb_pro_dev_if(dev->prev_siblings);
915 pdev->usb_if = usb_if;
916 usb_if->dev[dev->ctrl_idx] = dev;
918 /* set LED in default state (end of init phase) */
919 pcan_usb_pro_set_led(dev, 0, 1);
934 static void pcan_usb_pro_exit(struct peak_usb_device *dev)
936 struct pcan_usb_pro_device *pdev =
937 container_of(dev, struct pcan_usb_pro_device, dev);
940 * when rmmod called before unplug and if down, should reset things
943 if (dev->can.state != CAN_STATE_STOPPED) {
944 /* set bus off on the corresponding channel */
945 pcan_usb_pro_set_bus(dev, 0);
948 /* if channel #0 (only) */
949 if (dev->ctrl_idx == 0) {
950 /* turn off calibration message if any device were opened */
951 if (pdev->usb_if->dev_opened_count > 0)
952 pcan_usb_pro_set_ts(dev, 0);
954 /* tell the PCAN-USB Pro device the driver is being unloaded */
955 pcan_usb_pro_drv_loaded(dev, 0);
960 * called when PCAN-USB Pro adapter is unplugged
962 static void pcan_usb_pro_free(struct peak_usb_device *dev)
964 /* last device: can free pcan_usb_pro_interface object now */
965 if (!dev->prev_siblings && !dev->next_siblings)
966 kfree(pcan_usb_pro_dev_if(dev));
970 * probe function for new PCAN-USB Pro usb interface
972 int pcan_usb_pro_probe(struct usb_interface *intf)
974 struct usb_host_interface *if_desc;
977 if_desc = intf->altsetting;
979 /* check interface endpoint addresses */
980 for (i = 0; i < if_desc->desc.bNumEndpoints; i++) {
981 struct usb_endpoint_descriptor *ep = &if_desc->endpoint[i].desc;
984 * below is the list of valid ep addreses. Any other ep address
985 * is considered as not-CAN interface address => no dev created
987 switch (ep->bEndpointAddress) {
988 case PCAN_USBPRO_EP_CMDOUT:
989 case PCAN_USBPRO_EP_CMDIN:
990 case PCAN_USBPRO_EP_MSGOUT_0:
991 case PCAN_USBPRO_EP_MSGOUT_1:
992 case PCAN_USBPRO_EP_MSGIN:
993 case PCAN_USBPRO_EP_UNUSED:
1004 * describe the PCAN-USB Pro adapter
1006 static const struct can_bittiming_const pcan_usb_pro_const = {
1007 .name = "pcan_usb_pro",
1018 const struct peak_usb_adapter pcan_usb_pro = {
1019 .name = "PCAN-USB Pro",
1020 .device_id = PCAN_USBPRO_PRODUCT_ID,
1021 .ctrl_count = PCAN_USBPRO_CHANNEL_COUNT,
1022 .ctrlmode_supported = CAN_CTRLMODE_3_SAMPLES | CAN_CTRLMODE_LISTENONLY,
1024 .freq = PCAN_USBPRO_CRYSTAL_HZ,
1026 .bittiming_const = &pcan_usb_pro_const,
1028 /* size of device private data */
1029 .sizeof_dev_private = sizeof(struct pcan_usb_pro_device),
1031 /* timestamps usage */
1033 .ts_period = 1000000, /* calibration period in ts. */
1034 .us_per_ts_scale = 1, /* us = (ts * scale) >> shift */
1035 .us_per_ts_shift = 0,
1037 /* give here messages in/out endpoints */
1038 .ep_msg_in = PCAN_USBPRO_EP_MSGIN,
1039 .ep_msg_out = {PCAN_USBPRO_EP_MSGOUT_0, PCAN_USBPRO_EP_MSGOUT_1},
1041 /* size of rx/tx usb buffers */
1042 .rx_buffer_size = PCAN_USBPRO_RX_BUFFER_SIZE,
1043 .tx_buffer_size = PCAN_USBPRO_TX_BUFFER_SIZE,
1045 /* device callbacks */
1046 .intf_probe = pcan_usb_pro_probe,
1047 .dev_init = pcan_usb_pro_init,
1048 .dev_exit = pcan_usb_pro_exit,
1049 .dev_free = pcan_usb_pro_free,
1050 .dev_set_bus = pcan_usb_pro_set_bus,
1051 .dev_set_bittiming = pcan_usb_pro_set_bittiming,
1052 .dev_get_device_id = pcan_usb_pro_get_device_id,
1053 .dev_decode_buf = pcan_usb_pro_decode_buf,
1054 .dev_encode_msg = pcan_usb_pro_encode_msg,
1055 .dev_start = pcan_usb_pro_start,
1056 .dev_stop = pcan_usb_pro_stop,
1057 .dev_restart_async = pcan_usb_pro_restart_async,