Lines Matching +full:up +full:- +full:to
1 // SPDX-License-Identifier: GPL-2.0
41 /* the CAN controller needs a while to enable/disable the bus */
48 * ------------------------
64 * m[n] is is aligned to a 4 byte boundary, hence
79 /* start the can transceiver - val defines the operation mode */
83 /* send can transceiver into low-power sleep mode */
85 /* wake up can transceiver from low-power sleep mode */
89 /* get piece of info from the can transceiver - subcmd defines what
93 /* clear or disable hardware filter - subcmd defines which of the two */
97 /* recover from bus-off state */
102 * Undefined bits must be set to 0.
137 __le16 mode; /* OR-ing any of UCAN_MODE_* */
205 * msg.len - sizeof (msg.len)
206 * - sizeof (msg.type)
207 * - sizeof (msg.can_msg.id)
253 /* Macros to calculate message lengths */
263 struct ucan_priv *up; member
282 /* lock for can->echo_skb (used around
308 if (le32_to_cpu(msg->id) & CAN_RTR_FLAG) in ucan_can_cc_dlc2len()
309 return can_cc_dlc2len(msg->dlc); in ucan_can_cc_dlc2len()
311 return can_cc_dlc2len(len - (UCAN_IN_HDR_SIZE + sizeof(msg->id))); in ucan_can_cc_dlc2len()
314 static void ucan_release_context_array(struct ucan_priv *up) in ucan_release_context_array() argument
316 if (!up->context_array) in ucan_release_context_array()
320 up->available_tx_urbs = 0; in ucan_release_context_array()
322 kfree(up->context_array); in ucan_release_context_array()
323 up->context_array = NULL; in ucan_release_context_array()
326 static int ucan_alloc_context_array(struct ucan_priv *up) in ucan_alloc_context_array() argument
331 ucan_release_context_array(up); in ucan_alloc_context_array()
333 up->context_array = kcalloc(up->device_info.tx_fifo, in ucan_alloc_context_array()
334 sizeof(*up->context_array), in ucan_alloc_context_array()
336 if (!up->context_array) { in ucan_alloc_context_array()
337 netdev_err(up->netdev, in ucan_alloc_context_array()
338 "Not enough memory to allocate tx contexts\n"); in ucan_alloc_context_array()
339 return -ENOMEM; in ucan_alloc_context_array()
342 for (i = 0; i < up->device_info.tx_fifo; i++) { in ucan_alloc_context_array()
343 up->context_array[i].allocated = false; in ucan_alloc_context_array()
344 up->context_array[i].up = up; in ucan_alloc_context_array()
348 up->available_tx_urbs = up->device_info.tx_fifo; in ucan_alloc_context_array()
353 static struct ucan_urb_context *ucan_alloc_context(struct ucan_priv *up) in ucan_alloc_context() argument
359 if (WARN_ON_ONCE(!up->context_array)) in ucan_alloc_context()
363 spin_lock_irqsave(&up->context_lock, flags); in ucan_alloc_context()
365 for (i = 0; i < up->device_info.tx_fifo; i++) { in ucan_alloc_context()
366 if (!up->context_array[i].allocated) { in ucan_alloc_context()
368 ret = &up->context_array[i]; in ucan_alloc_context()
369 up->context_array[i].allocated = true; in ucan_alloc_context()
372 up->available_tx_urbs--; in ucan_alloc_context()
373 if (!up->available_tx_urbs) in ucan_alloc_context()
374 netif_stop_queue(up->netdev); in ucan_alloc_context()
380 spin_unlock_irqrestore(&up->context_lock, flags); in ucan_alloc_context()
384 static bool ucan_release_context(struct ucan_priv *up, in ucan_release_context() argument
390 if (WARN_ON_ONCE(!up->context_array)) in ucan_release_context()
394 spin_lock_irqsave(&up->context_lock, flags); in ucan_release_context()
397 if (ctx->allocated) { in ucan_release_context()
398 ctx->allocated = false; in ucan_release_context()
400 /* check if the queue needs to be woken */ in ucan_release_context()
401 if (!up->available_tx_urbs) in ucan_release_context()
402 netif_wake_queue(up->netdev); in ucan_release_context()
403 up->available_tx_urbs++; in ucan_release_context()
408 spin_unlock_irqrestore(&up->context_lock, flags); in ucan_release_context()
412 static int ucan_ctrl_command_out(struct ucan_priv *up, in ucan_ctrl_command_out() argument
415 return usb_control_msg(up->udev, in ucan_ctrl_command_out()
416 usb_sndctrlpipe(up->udev, 0), in ucan_ctrl_command_out()
421 up->intf_index, in ucan_ctrl_command_out()
422 up->ctl_msg_buffer, in ucan_ctrl_command_out()
427 static void ucan_get_fw_str(struct ucan_priv *up, char *fw_str, size_t size) in ucan_get_fw_str() argument
431 ret = usb_control_msg(up->udev, usb_rcvctrlpipe(up->udev, 0), in ucan_get_fw_str()
435 0, 0, fw_str, size - 1, in ucan_get_fw_str()
446 static void ucan_parse_device_info(struct ucan_priv *up, in ucan_parse_device_info() argument
450 &up->device_info.bittiming_const; in ucan_parse_device_info()
454 up->can.clock.freq = le32_to_cpu(device_info->freq); in ucan_parse_device_info()
455 up->device_info.tx_fifo = device_info->tx_fifo; in ucan_parse_device_info()
456 strcpy(bittiming->name, "ucan"); in ucan_parse_device_info()
457 bittiming->tseg1_min = device_info->tseg1_min; in ucan_parse_device_info()
458 bittiming->tseg1_max = device_info->tseg1_max; in ucan_parse_device_info()
459 bittiming->tseg2_min = device_info->tseg2_min; in ucan_parse_device_info()
460 bittiming->tseg2_max = device_info->tseg2_max; in ucan_parse_device_info()
461 bittiming->sjw_max = device_info->sjw_max; in ucan_parse_device_info()
462 bittiming->brp_min = le32_to_cpu(device_info->brp_min); in ucan_parse_device_info()
463 bittiming->brp_max = le32_to_cpu(device_info->brp_max); in ucan_parse_device_info()
464 bittiming->brp_inc = le16_to_cpu(device_info->brp_inc); in ucan_parse_device_info()
466 ctrlmodes = le16_to_cpu(device_info->ctrlmodes); in ucan_parse_device_info()
468 up->can.ctrlmode_supported = 0; in ucan_parse_device_info()
471 up->can.ctrlmode_supported |= CAN_CTRLMODE_LOOPBACK; in ucan_parse_device_info()
473 up->can.ctrlmode_supported |= CAN_CTRLMODE_LISTENONLY; in ucan_parse_device_info()
475 up->can.ctrlmode_supported |= CAN_CTRLMODE_3_SAMPLES; in ucan_parse_device_info()
477 up->can.ctrlmode_supported |= CAN_CTRLMODE_ONE_SHOT; in ucan_parse_device_info()
479 up->can.ctrlmode_supported |= CAN_CTRLMODE_BERR_REPORTING; in ucan_parse_device_info()
485 static bool ucan_handle_error_frame(struct ucan_priv *up, in ucan_handle_error_frame() argument
489 enum can_state new_state = up->can.state; in ucan_handle_error_frame()
490 struct net_device_stats *net_stats = &up->netdev->stats; in ucan_handle_error_frame()
491 struct can_device_stats *can_stats = &up->can.can_stats; in ucan_handle_error_frame()
494 can_stats->arbitration_lost++; in ucan_handle_error_frame()
497 can_stats->bus_error++; in ucan_handle_error_frame()
500 net_stats->tx_errors++; in ucan_handle_error_frame()
507 u8 d1 = m->msg.can_msg.data[1]; in ucan_handle_error_frame()
510 net_stats->rx_over_errors++; in ucan_handle_error_frame()
525 u8 d2 = m->msg.can_msg.data[2]; in ucan_handle_error_frame()
528 net_stats->tx_errors++; in ucan_handle_error_frame()
530 net_stats->rx_errors++; in ucan_handle_error_frame()
533 /* no state change - we are done */ in ucan_handle_error_frame()
534 if (up->can.state == new_state) in ucan_handle_error_frame()
538 if (up->can.state > new_state) { in ucan_handle_error_frame()
539 up->can.state = new_state; in ucan_handle_error_frame()
544 up->can.state = new_state; in ucan_handle_error_frame()
547 can_stats->bus_off++; in ucan_handle_error_frame()
548 can_bus_off(up->netdev); in ucan_handle_error_frame()
551 can_stats->error_passive++; in ucan_handle_error_frame()
554 can_stats->error_warning++; in ucan_handle_error_frame()
564 * This function allocates an skb and transferres it to the Linux
567 static void ucan_rx_can_msg(struct ucan_priv *up, struct ucan_message_in *m) in ucan_rx_can_msg() argument
573 struct net_device_stats *stats = &up->netdev->stats; in ucan_rx_can_msg()
576 len = le16_to_cpu(m->len); in ucan_rx_can_msg()
579 if (len < UCAN_IN_HDR_SIZE + sizeof(m->msg.can_msg.id)) { in ucan_rx_can_msg()
580 netdev_warn(up->netdev, "invalid input message len: %d\n", len); in ucan_rx_can_msg()
585 canid = le32_to_cpu(m->msg.can_msg.id); in ucan_rx_can_msg()
587 bool busstate_changed = ucan_handle_error_frame(up, m, canid); in ucan_rx_can_msg()
589 /* if berr-reporting is off only state changes get through */ in ucan_rx_can_msg()
590 if (!(up->can.ctrlmode & CAN_CTRLMODE_BERR_REPORTING) && in ucan_rx_can_msg()
603 netdev_warn(up->netdev, in ucan_rx_can_msg()
611 skb = alloc_can_skb(up->netdev, &cf); in ucan_rx_can_msg()
616 cf->can_id = canid; in ucan_rx_can_msg()
619 cf->len = ucan_can_cc_dlc2len(&m->msg.can_msg, len); in ucan_rx_can_msg()
622 if (!(cf->can_id & CAN_RTR_FLAG) || (cf->can_id & CAN_ERR_FLAG)) in ucan_rx_can_msg()
623 memcpy(cf->data, m->msg.can_msg.data, cf->len); in ucan_rx_can_msg()
626 if (!(cf->can_id & CAN_ERR_FLAG)) { in ucan_rx_can_msg()
627 stats->rx_packets++; in ucan_rx_can_msg()
628 if (!(cf->can_id & CAN_RTR_FLAG)) in ucan_rx_can_msg()
629 stats->rx_bytes += cf->len; in ucan_rx_can_msg()
632 /* pass it to Linux */ in ucan_rx_can_msg()
637 static void ucan_tx_complete_msg(struct ucan_priv *up, in ucan_tx_complete_msg() argument
643 u16 len = le16_to_cpu(m->len); in ucan_tx_complete_msg()
648 netdev_err(up->netdev, "invalid tx complete length\n"); in ucan_tx_complete_msg()
652 count = (len - UCAN_IN_HDR_SIZE) / 2; in ucan_tx_complete_msg()
655 echo_index = m->msg.can_tx_complete_msg[i].echo_index; in ucan_tx_complete_msg()
656 if (echo_index >= up->device_info.tx_fifo) { in ucan_tx_complete_msg()
657 up->netdev->stats.tx_errors++; in ucan_tx_complete_msg()
658 netdev_err(up->netdev, in ucan_tx_complete_msg()
665 context = &up->context_array[echo_index]; in ucan_tx_complete_msg()
670 if (!ucan_release_context(up, context)) in ucan_tx_complete_msg()
673 spin_lock_irqsave(&up->echo_skb_lock, flags); in ucan_tx_complete_msg()
674 if (m->msg.can_tx_complete_msg[i].flags & in ucan_tx_complete_msg()
677 up->netdev->stats.tx_packets++; in ucan_tx_complete_msg()
678 up->netdev->stats.tx_bytes += in ucan_tx_complete_msg()
679 can_get_echo_skb(up->netdev, echo_index, NULL); in ucan_tx_complete_msg()
681 up->netdev->stats.tx_dropped++; in ucan_tx_complete_msg()
682 can_free_echo_skb(up->netdev, echo_index, NULL); in ucan_tx_complete_msg()
684 spin_unlock_irqrestore(&up->echo_skb_lock, flags); in ucan_tx_complete_msg()
693 struct ucan_priv *up = urb->context; in ucan_read_bulk_callback() local
694 struct net_device *netdev = up->netdev; in ucan_read_bulk_callback()
697 /* the device is not up and the driver should not receive any in ucan_read_bulk_callback()
700 if (WARN_ON(!up->context_array)) { in ucan_read_bulk_callback()
701 usb_free_coherent(up->udev, in ucan_read_bulk_callback()
702 up->in_ep_size, in ucan_read_bulk_callback()
703 urb->transfer_buffer, in ucan_read_bulk_callback()
704 urb->transfer_dma); in ucan_read_bulk_callback()
709 switch (urb->status) { in ucan_read_bulk_callback()
712 case -ENOENT: in ucan_read_bulk_callback()
713 case -EPIPE: in ucan_read_bulk_callback()
714 case -EPROTO: in ucan_read_bulk_callback()
715 case -ESHUTDOWN: in ucan_read_bulk_callback()
716 case -ETIME: in ucan_read_bulk_callback()
717 /* urb is not resubmitted -> free dma data */ in ucan_read_bulk_callback()
718 usb_free_coherent(up->udev, in ucan_read_bulk_callback()
719 up->in_ep_size, in ucan_read_bulk_callback()
720 urb->transfer_buffer, in ucan_read_bulk_callback()
721 urb->transfer_dma); in ucan_read_bulk_callback()
722 netdev_dbg(up->netdev, "not resubmitting urb; status: %d\n", in ucan_read_bulk_callback()
723 urb->status); in ucan_read_bulk_callback()
735 while (pos < urb->actual_length) { in ucan_read_bulk_callback()
739 if ((urb->actual_length - pos) < UCAN_IN_HDR_SIZE) { in ucan_read_bulk_callback()
740 netdev_warn(up->netdev, in ucan_read_bulk_callback()
742 urb->actual_length); in ucan_read_bulk_callback()
748 ((u8 *)urb->transfer_buffer + pos); in ucan_read_bulk_callback()
749 len = le16_to_cpu(m->len); in ucan_read_bulk_callback()
752 if (urb->actual_length - pos < len) { in ucan_read_bulk_callback()
753 netdev_warn(up->netdev, in ucan_read_bulk_callback()
755 urb->actual_length); in ucan_read_bulk_callback()
761 urb->transfer_buffer, in ucan_read_bulk_callback()
762 urb->actual_length, in ucan_read_bulk_callback()
768 switch (m->type) { in ucan_read_bulk_callback()
770 ucan_rx_can_msg(up, m); in ucan_read_bulk_callback()
773 ucan_tx_complete_msg(up, m); in ucan_read_bulk_callback()
776 netdev_warn(up->netdev, in ucan_read_bulk_callback()
778 m->type); in ucan_read_bulk_callback()
782 /* proceed to next message */ in ucan_read_bulk_callback()
784 /* align to 4 byte boundary */ in ucan_read_bulk_callback()
790 usb_fill_bulk_urb(urb, up->udev, in ucan_read_bulk_callback()
791 usb_rcvbulkpipe(up->udev, in ucan_read_bulk_callback()
792 up->in_ep_addr), in ucan_read_bulk_callback()
793 urb->transfer_buffer, in ucan_read_bulk_callback()
794 up->in_ep_size, in ucan_read_bulk_callback()
796 up); in ucan_read_bulk_callback()
798 usb_anchor_urb(urb, &up->rx_urbs); in ucan_read_bulk_callback()
802 netdev_err(up->netdev, in ucan_read_bulk_callback()
807 usb_free_coherent(up->udev, in ucan_read_bulk_callback()
808 up->in_ep_size, in ucan_read_bulk_callback()
809 urb->transfer_buffer, in ucan_read_bulk_callback()
810 urb->transfer_dma); in ucan_read_bulk_callback()
812 if (ret == -ENODEV) in ucan_read_bulk_callback()
821 struct ucan_priv *up; in ucan_write_bulk_callback() local
822 struct ucan_urb_context *context = urb->context; in ucan_write_bulk_callback()
828 /* free up our allocated buffer */ in ucan_write_bulk_callback()
829 usb_free_coherent(urb->dev, in ucan_write_bulk_callback()
831 urb->transfer_buffer, in ucan_write_bulk_callback()
832 urb->transfer_dma); in ucan_write_bulk_callback()
834 up = context->up; in ucan_write_bulk_callback()
835 if (WARN_ON_ONCE(!up)) in ucan_write_bulk_callback()
839 if (!netif_device_present(up->netdev)) in ucan_write_bulk_callback()
842 /* transmission failed (USB - the device will not send a TX complete) */ in ucan_write_bulk_callback()
843 if (urb->status) { in ucan_write_bulk_callback()
844 netdev_warn(up->netdev, in ucan_write_bulk_callback()
845 "failed to transmit USB message to device: %d\n", in ucan_write_bulk_callback()
846 urb->status); in ucan_write_bulk_callback()
849 spin_lock_irqsave(&up->echo_skb_lock, flags); in ucan_write_bulk_callback()
850 can_free_echo_skb(up->netdev, context - up->context_array, NULL); in ucan_write_bulk_callback()
851 spin_unlock_irqrestore(&up->echo_skb_lock, flags); in ucan_write_bulk_callback()
853 up->netdev->stats.tx_dropped++; in ucan_write_bulk_callback()
856 if (!ucan_release_context(up, context)) in ucan_write_bulk_callback()
857 netdev_err(up->netdev, in ucan_write_bulk_callback()
858 "urb failed, failed to release context\n"); in ucan_write_bulk_callback()
862 static void ucan_cleanup_rx_urbs(struct ucan_priv *up, struct urb **urbs) in ucan_cleanup_rx_urbs() argument
869 usb_free_coherent(up->udev, in ucan_cleanup_rx_urbs()
870 up->in_ep_size, in ucan_cleanup_rx_urbs()
871 urbs[i]->transfer_buffer, in ucan_cleanup_rx_urbs()
872 urbs[i]->transfer_dma); in ucan_cleanup_rx_urbs()
880 static int ucan_prepare_and_anchor_rx_urbs(struct ucan_priv *up, in ucan_prepare_and_anchor_rx_urbs() argument
894 buf = usb_alloc_coherent(up->udev, in ucan_prepare_and_anchor_rx_urbs()
895 up->in_ep_size, in ucan_prepare_and_anchor_rx_urbs()
896 GFP_KERNEL, &urbs[i]->transfer_dma); in ucan_prepare_and_anchor_rx_urbs()
904 usb_fill_bulk_urb(urbs[i], up->udev, in ucan_prepare_and_anchor_rx_urbs()
905 usb_rcvbulkpipe(up->udev, in ucan_prepare_and_anchor_rx_urbs()
906 up->in_ep_addr), in ucan_prepare_and_anchor_rx_urbs()
908 up->in_ep_size, in ucan_prepare_and_anchor_rx_urbs()
910 up); in ucan_prepare_and_anchor_rx_urbs()
912 urbs[i]->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; in ucan_prepare_and_anchor_rx_urbs()
914 usb_anchor_urb(urbs[i], &up->rx_urbs); in ucan_prepare_and_anchor_rx_urbs()
920 ucan_cleanup_rx_urbs(up, urbs); in ucan_prepare_and_anchor_rx_urbs()
921 return -ENOMEM; in ucan_prepare_and_anchor_rx_urbs()
927 * array is set to NULL.
929 static int ucan_submit_rx_urbs(struct ucan_priv *up, struct urb **urbs) in ucan_submit_rx_urbs() argument
933 /* Iterate over all urbs to submit. On success remove the urb in ucan_submit_rx_urbs()
939 netdev_err(up->netdev, in ucan_submit_rx_urbs()
955 ucan_cleanup_rx_urbs(up, urbs); in ucan_submit_rx_urbs()
958 usb_kill_anchored_urbs(&up->rx_urbs); in ucan_submit_rx_urbs()
969 struct ucan_priv *up = netdev_priv(netdev); in ucan_open() local
971 ret = ucan_alloc_context_array(up); in ucan_open()
975 /* Allocate and prepare IN URBS - allocated and anchored in ucan_open()
978 ret = ucan_prepare_and_anchor_rx_urbs(up, urbs); in ucan_open()
984 if (up->can.ctrlmode & CAN_CTRLMODE_LOOPBACK) in ucan_open()
986 if (up->can.ctrlmode & CAN_CTRLMODE_LISTENONLY) in ucan_open()
988 if (up->can.ctrlmode & CAN_CTRLMODE_3_SAMPLES) in ucan_open()
990 if (up->can.ctrlmode & CAN_CTRLMODE_ONE_SHOT) in ucan_open()
993 /* Enable this in any case - filtering is down within the in ucan_open()
997 up->ctl_msg_buffer->cmd_start.mode = cpu_to_le16(ctrlmode); in ucan_open()
999 /* Driver is ready to receive data - start the USB device */ in ucan_open()
1000 ret = ucan_ctrl_command_out(up, UCAN_COMMAND_START, 0, 2); in ucan_open()
1002 netdev_err(up->netdev, in ucan_open()
1013 /* Driver is ready to receive data. Submit RX URBS */ in ucan_open()
1014 ret = ucan_submit_rx_urbs(up, urbs); in ucan_open()
1018 up->can.state = CAN_STATE_ERROR_ACTIVE; in ucan_open()
1027 ret_cleanup = ucan_ctrl_command_out(up, UCAN_COMMAND_STOP, 0, 0); in ucan_open()
1029 netdev_err(up->netdev, in ucan_open()
1037 ret_cleanup = ucan_ctrl_command_out(up, UCAN_COMMAND_RESET, 0, 0); in ucan_open()
1039 netdev_err(up->netdev, in ucan_open()
1043 /* clean up unsubmitted urbs */ in ucan_open()
1044 ucan_cleanup_rx_urbs(up, urbs); in ucan_open()
1047 ucan_release_context_array(up); in ucan_open()
1051 static struct urb *ucan_prepare_tx_urb(struct ucan_priv *up, in ucan_prepare_tx_urb() argument
1060 /* create a URB, and a buffer for it, and copy the data to the URB */ in ucan_prepare_tx_urb()
1063 netdev_err(up->netdev, "no memory left for URBs\n"); in ucan_prepare_tx_urb()
1067 m = usb_alloc_coherent(up->udev, in ucan_prepare_tx_urb()
1070 &urb->transfer_dma); in ucan_prepare_tx_urb()
1072 netdev_err(up->netdev, "no memory left for USB buffer\n"); in ucan_prepare_tx_urb()
1078 m->type = UCAN_OUT_TX; in ucan_prepare_tx_urb()
1079 m->msg.can_msg.id = cpu_to_le32(cf->can_id); in ucan_prepare_tx_urb()
1081 if (cf->can_id & CAN_RTR_FLAG) { in ucan_prepare_tx_urb()
1084 sizeof(m->msg.can_msg.dlc); in ucan_prepare_tx_urb()
1085 m->msg.can_msg.dlc = cf->len; in ucan_prepare_tx_urb()
1088 sizeof(m->msg.can_msg.id) + cf->len; in ucan_prepare_tx_urb()
1089 memcpy(m->msg.can_msg.data, cf->data, cf->len); in ucan_prepare_tx_urb()
1091 m->len = cpu_to_le16(mlen); in ucan_prepare_tx_urb()
1093 m->subtype = echo_index; in ucan_prepare_tx_urb()
1096 usb_fill_bulk_urb(urb, up->udev, in ucan_prepare_tx_urb()
1097 usb_sndbulkpipe(up->udev, in ucan_prepare_tx_urb()
1098 up->out_ep_addr), in ucan_prepare_tx_urb()
1100 urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; in ucan_prepare_tx_urb()
1105 static void ucan_clean_up_tx_urb(struct ucan_priv *up, struct urb *urb) in ucan_clean_up_tx_urb() argument
1107 usb_free_coherent(up->udev, sizeof(struct ucan_message_out), in ucan_clean_up_tx_urb()
1108 urb->transfer_buffer, urb->transfer_dma); in ucan_clean_up_tx_urb()
1112 /* callback when Linux needs to send a can frame */
1121 struct ucan_priv *up = netdev_priv(netdev); in ucan_start_xmit() local
1122 struct can_frame *cf = (struct can_frame *)skb->data; in ucan_start_xmit()
1129 context = ucan_alloc_context(up); in ucan_start_xmit()
1130 echo_index = context - up->context_array; in ucan_start_xmit()
1136 urb = ucan_prepare_tx_urb(up, context, cf, echo_index); in ucan_start_xmit()
1141 spin_lock_irqsave(&up->echo_skb_lock, flags); in ucan_start_xmit()
1142 can_put_echo_skb(skb, up->netdev, echo_index, 0); in ucan_start_xmit()
1143 spin_unlock_irqrestore(&up->echo_skb_lock, flags); in ucan_start_xmit()
1146 usb_anchor_urb(urb, &up->tx_urbs); in ucan_start_xmit()
1151 /* on error, clean up */ in ucan_start_xmit()
1153 ucan_clean_up_tx_urb(up, urb); in ucan_start_xmit()
1154 if (!ucan_release_context(up, context)) in ucan_start_xmit()
1155 netdev_err(up->netdev, in ucan_start_xmit()
1156 "xmit err: failed to release context\n"); in ucan_start_xmit()
1158 /* remove the skb from the echo stack - this also in ucan_start_xmit()
1161 spin_lock_irqsave(&up->echo_skb_lock, flags); in ucan_start_xmit()
1162 can_free_echo_skb(up->netdev, echo_index, NULL); in ucan_start_xmit()
1163 spin_unlock_irqrestore(&up->echo_skb_lock, flags); in ucan_start_xmit()
1165 if (ret == -ENODEV) { in ucan_start_xmit()
1166 netif_device_detach(up->netdev); in ucan_start_xmit()
1168 netdev_warn(up->netdev, in ucan_start_xmit()
1169 "xmit err: failed to submit urb %d\n", in ucan_start_xmit()
1171 up->netdev->stats.tx_dropped++; in ucan_start_xmit()
1184 if (!ucan_release_context(up, context)) in ucan_start_xmit()
1185 netdev_err(up->netdev, in ucan_start_xmit()
1186 "xmit drop: failed to release context\n"); in ucan_start_xmit()
1188 up->netdev->stats.tx_dropped++; in ucan_start_xmit()
1195 * Clean up used resources
1200 struct ucan_priv *up = netdev_priv(netdev); in ucan_close() local
1202 up->can.state = CAN_STATE_STOPPED; in ucan_close()
1205 usb_kill_anchored_urbs(&up->tx_urbs); in ucan_close()
1208 usb_kill_anchored_urbs(&up->rx_urbs); in ucan_close()
1211 ret = ucan_ctrl_command_out(up, UCAN_COMMAND_STOP, 0, 0); in ucan_close()
1213 netdev_err(up->netdev, in ucan_close()
1217 ret = ucan_ctrl_command_out(up, UCAN_COMMAND_RESET, 0, 0); in ucan_close()
1219 netdev_err(up->netdev, in ucan_close()
1225 ucan_release_context_array(up); in ucan_close()
1227 close_candev(up->netdev); in ucan_close()
1243 /* Request to set bittiming
1246 * it to the device
1251 struct ucan_priv *up = netdev_priv(netdev); in ucan_set_bittiming() local
1254 cmd_set_bittiming = &up->ctl_msg_buffer->cmd_set_bittiming; in ucan_set_bittiming()
1255 cmd_set_bittiming->tq = cpu_to_le32(up->can.bittiming.tq); in ucan_set_bittiming()
1256 cmd_set_bittiming->brp = cpu_to_le16(up->can.bittiming.brp); in ucan_set_bittiming()
1257 cmd_set_bittiming->sample_point = in ucan_set_bittiming()
1258 cpu_to_le16(up->can.bittiming.sample_point); in ucan_set_bittiming()
1259 cmd_set_bittiming->prop_seg = up->can.bittiming.prop_seg; in ucan_set_bittiming()
1260 cmd_set_bittiming->phase_seg1 = up->can.bittiming.phase_seg1; in ucan_set_bittiming()
1261 cmd_set_bittiming->phase_seg2 = up->can.bittiming.phase_seg2; in ucan_set_bittiming()
1262 cmd_set_bittiming->sjw = up->can.bittiming.sjw; in ucan_set_bittiming()
1264 ret = ucan_ctrl_command_out(up, UCAN_COMMAND_SET_BITTIMING, 0, in ucan_set_bittiming()
1269 /* Restart the device to get it out of BUS-OFF state.
1276 struct ucan_priv *up = netdev_priv(netdev); in ucan_set_mode() local
1280 netdev_dbg(up->netdev, "restarting device\n"); in ucan_set_mode()
1282 ret = ucan_ctrl_command_out(up, UCAN_COMMAND_RESTART, 0, 0); in ucan_set_mode()
1283 up->can.state = CAN_STATE_ERROR_ACTIVE; in ucan_set_mode()
1286 * up->available_tx_urbs must be protected by the in ucan_set_mode()
1289 spin_lock_irqsave(&up->context_lock, flags); in ucan_set_mode()
1291 if (up->available_tx_urbs > 0) in ucan_set_mode()
1292 netif_wake_queue(up->netdev); in ucan_set_mode()
1294 spin_unlock_irqrestore(&up->context_lock, flags); in ucan_set_mode()
1298 return -EOPNOTSUPP; in ucan_set_mode()
1312 struct ucan_priv *up; in ucan_probe() local
1322 /* Stage 1 - Interface Parsing in ucan_probe()
1323 * --------------------------- in ucan_probe()
1330 iface_desc = intf->cur_altsetting; in ucan_probe()
1332 return -ENODEV; in ucan_probe()
1334 dev_info(&udev->dev, in ucan_probe()
1337 iface_desc->desc.bInterfaceNumber); in ucan_probe()
1340 if (iface_desc->desc.bNumEndpoints != 2) { in ucan_probe()
1341 dev_err(&udev->dev, in ucan_probe()
1343 UCAN_DRIVER_NAME, iface_desc->desc.bNumEndpoints); in ucan_probe()
1352 for (i = 0; i < iface_desc->desc.bNumEndpoints; i++) { in ucan_probe()
1353 ep = &iface_desc->endpoint[i].desc; in ucan_probe()
1355 if (((ep->bEndpointAddress & USB_ENDPOINT_DIR_MASK) != 0) && in ucan_probe()
1356 ((ep->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) == in ucan_probe()
1359 in_ep_addr = ep->bEndpointAddress; in ucan_probe()
1361 in_ep_size = le16_to_cpu(ep->wMaxPacketSize); in ucan_probe()
1362 } else if (((ep->bEndpointAddress & USB_ENDPOINT_DIR_MASK) == in ucan_probe()
1364 ((ep->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) == in ucan_probe()
1367 out_ep_addr = ep->bEndpointAddress; in ucan_probe()
1369 out_ep_size = le16_to_cpu(ep->wMaxPacketSize); in ucan_probe()
1375 dev_err(&udev->dev, "%s: invalid endpoint configuration\n", in ucan_probe()
1380 dev_err(&udev->dev, "%s: invalid in_ep MaxPacketSize\n", in ucan_probe()
1385 dev_err(&udev->dev, "%s: invalid out_ep MaxPacketSize\n", in ucan_probe()
1390 /* Stage 2 - Device Identification in ucan_probe()
1391 * ------------------------------- in ucan_probe()
1393 * The device interface seems to be a ucan device. Do further in ucan_probe()
1402 ctl_msg_buffer = devm_kzalloc(&udev->dev, in ucan_probe()
1406 dev_err(&udev->dev, in ucan_probe()
1407 "%s: failed to allocate control pipe memory\n", in ucan_probe()
1409 return -ENOMEM; in ucan_probe()
1415 * because `up` is initialised in Stage 3 in ucan_probe()
1423 iface_desc->desc.bInterfaceNumber, in ucan_probe()
1428 /* older firmware version do not support this command - those in ucan_probe()
1432 dev_err(&udev->dev, in ucan_probe()
1436 ret = -EINVAL; in ucan_probe()
1442 le32_to_cpu(ctl_msg_buffer->cmd_get_protocol_version.version); in ucan_probe()
1445 dev_err(&udev->dev, in ucan_probe()
1454 * because `up` is initialised in Stage 3 in ucan_probe()
1462 iface_desc->desc.bInterfaceNumber, in ucan_probe()
1464 sizeof(ctl_msg_buffer->cmd_get_device_info), in ucan_probe()
1468 dev_err(&udev->dev, "%s: failed to retrieve device info\n", in ucan_probe()
1472 if (ret < sizeof(ctl_msg_buffer->cmd_get_device_info)) { in ucan_probe()
1473 dev_err(&udev->dev, "%s: device reported invalid device info\n", in ucan_probe()
1477 if (ctl_msg_buffer->cmd_get_device_info.tx_fifo == 0) { in ucan_probe()
1478 dev_err(&udev->dev, in ucan_probe()
1479 "%s: device reported invalid tx-fifo size\n", in ucan_probe()
1484 /* Stage 3 - Driver Initialisation in ucan_probe()
1485 * ------------------------------- in ucan_probe()
1487 * Register device to Linux, prepare private structures and in ucan_probe()
1493 ctl_msg_buffer->cmd_get_device_info.tx_fifo); in ucan_probe()
1495 dev_err(&udev->dev, in ucan_probe()
1497 return -ENOMEM; in ucan_probe()
1500 up = netdev_priv(netdev); in ucan_probe()
1503 up->udev = udev; in ucan_probe()
1504 up->netdev = netdev; in ucan_probe()
1505 up->intf_index = iface_desc->desc.bInterfaceNumber; in ucan_probe()
1506 up->in_ep_addr = in_ep_addr; in ucan_probe()
1507 up->out_ep_addr = out_ep_addr; in ucan_probe()
1508 up->in_ep_size = in_ep_size; in ucan_probe()
1509 up->ctl_msg_buffer = ctl_msg_buffer; in ucan_probe()
1510 up->context_array = NULL; in ucan_probe()
1511 up->available_tx_urbs = 0; in ucan_probe()
1513 up->can.state = CAN_STATE_STOPPED; in ucan_probe()
1514 up->can.bittiming_const = &up->device_info.bittiming_const; in ucan_probe()
1515 up->can.do_set_bittiming = ucan_set_bittiming; in ucan_probe()
1516 up->can.do_set_mode = &ucan_set_mode; in ucan_probe()
1517 spin_lock_init(&up->context_lock); in ucan_probe()
1518 spin_lock_init(&up->echo_skb_lock); in ucan_probe()
1519 netdev->netdev_ops = &ucan_netdev_ops; in ucan_probe()
1520 netdev->ethtool_ops = &ucan_ethtool_ops; in ucan_probe()
1522 usb_set_intfdata(intf, up); in ucan_probe()
1523 SET_NETDEV_DEV(netdev, &intf->dev); in ucan_probe()
1527 * up->ctl_msg_buffer in ucan_probe()
1529 ucan_parse_device_info(up, &ctl_msg_buffer->cmd_get_device_info); in ucan_probe()
1532 ret = ucan_ctrl_command_out(up, UCAN_COMMAND_RESET, 0, 0); in ucan_probe()
1536 init_usb_anchor(&up->rx_urbs); in ucan_probe()
1537 init_usb_anchor(&up->tx_urbs); in ucan_probe()
1539 up->can.state = CAN_STATE_STOPPED; in ucan_probe()
1547 netdev_info(up->netdev, "registered device\n"); in ucan_probe()
1548 ucan_get_fw_str(up, up->ctl_msg_buffer->fw_str, in ucan_probe()
1549 sizeof(up->ctl_msg_buffer->fw_str)); in ucan_probe()
1550 netdev_info(up->netdev, "firmware string: %s\n", in ucan_probe()
1551 up->ctl_msg_buffer->fw_str); in ucan_probe()
1561 dev_err(&udev->dev, in ucan_probe()
1562 "%s: probe failed; try to update the device firmware\n", in ucan_probe()
1564 return -ENODEV; in ucan_probe()
1570 struct ucan_priv *up = usb_get_intfdata(intf); in ucan_disconnect() local
1574 if (up) { in ucan_disconnect()
1575 unregister_candev(up->netdev); in ucan_disconnect()
1576 free_candev(up->netdev); in ucan_disconnect()
1600 MODULE_AUTHOR("Martin Elshuber <martin.elshuber@theobroma-systems.com>");
1601 MODULE_AUTHOR("Jakob Unterwurzacher <jakob.unterwurzacher@theobroma-systems.com>");