| // SPDX-License-Identifier: GPL-2.0 |
| /* Parts of this driver are based on the following: |
| * - Kvaser linux leaf driver (version 4.78) |
| * - CAN driver for esd CAN-USB/2 |
| * - Kvaser linux usbcanII driver (version 5.3) |
| * - Kvaser linux mhydra driver (version 5.24) |
| * |
| * Copyright (C) 2002-2018 KVASER AB, Sweden. All rights reserved. |
| * Copyright (C) 2010 Matthias Fuchs <matthias.fuchs@esd.eu>, esd gmbh |
| * Copyright (C) 2012 Olivier Sobrie <olivier@sobrie.be> |
| * Copyright (C) 2015 Valeo S.A. |
| */ |
| |
| #include <linux/completion.h> |
| #include <linux/device.h> |
| #include <linux/gfp.h> |
| #include <linux/if.h> |
| #include <linux/kernel.h> |
| #include <linux/module.h> |
| #include <linux/netdevice.h> |
| #include <linux/spinlock.h> |
| #include <linux/types.h> |
| #include <linux/usb.h> |
| |
| #include <linux/can.h> |
| #include <linux/can/dev.h> |
| #include <linux/can/error.h> |
| #include <linux/can/netlink.h> |
| |
| #include "kvaser_usb.h" |
| |
| /* Kvaser USB vendor id. */ |
| #define KVASER_VENDOR_ID 0x0bfd |
| |
| /* Kvaser Leaf USB devices product ids */ |
| #define USB_LEAF_DEVEL_PRODUCT_ID 10 |
| #define USB_LEAF_LITE_PRODUCT_ID 11 |
| #define USB_LEAF_PRO_PRODUCT_ID 12 |
| #define USB_LEAF_SPRO_PRODUCT_ID 14 |
| #define USB_LEAF_PRO_LS_PRODUCT_ID 15 |
| #define USB_LEAF_PRO_SWC_PRODUCT_ID 16 |
| #define USB_LEAF_PRO_LIN_PRODUCT_ID 17 |
| #define USB_LEAF_SPRO_LS_PRODUCT_ID 18 |
| #define USB_LEAF_SPRO_SWC_PRODUCT_ID 19 |
| #define USB_MEMO2_DEVEL_PRODUCT_ID 22 |
| #define USB_MEMO2_HSHS_PRODUCT_ID 23 |
| #define USB_UPRO_HSHS_PRODUCT_ID 24 |
| #define USB_LEAF_LITE_GI_PRODUCT_ID 25 |
| #define USB_LEAF_PRO_OBDII_PRODUCT_ID 26 |
| #define USB_MEMO2_HSLS_PRODUCT_ID 27 |
| #define USB_LEAF_LITE_CH_PRODUCT_ID 28 |
| #define USB_BLACKBIRD_SPRO_PRODUCT_ID 29 |
| #define USB_OEM_MERCURY_PRODUCT_ID 34 |
| #define USB_OEM_LEAF_PRODUCT_ID 35 |
| #define USB_CAN_R_PRODUCT_ID 39 |
| #define USB_LEAF_LITE_V2_PRODUCT_ID 288 |
| #define USB_MINI_PCIE_HS_PRODUCT_ID 289 |
| #define USB_LEAF_LIGHT_HS_V2_OEM_PRODUCT_ID 290 |
| #define USB_USBCAN_LIGHT_2HS_PRODUCT_ID 291 |
| #define USB_MINI_PCIE_2HS_PRODUCT_ID 292 |
| |
| /* Kvaser USBCan-II devices product ids */ |
| #define USB_USBCAN_REVB_PRODUCT_ID 2 |
| #define USB_VCI2_PRODUCT_ID 3 |
| #define USB_USBCAN2_PRODUCT_ID 4 |
| #define USB_MEMORATOR_PRODUCT_ID 5 |
| |
| /* Kvaser Minihydra USB devices product ids */ |
| #define USB_BLACKBIRD_V2_PRODUCT_ID 258 |
| #define USB_MEMO_PRO_5HS_PRODUCT_ID 260 |
| #define USB_USBCAN_PRO_5HS_PRODUCT_ID 261 |
| #define USB_USBCAN_LIGHT_4HS_PRODUCT_ID 262 |
| #define USB_LEAF_PRO_HS_V2_PRODUCT_ID 263 |
| #define USB_USBCAN_PRO_2HS_V2_PRODUCT_ID 264 |
| #define USB_MEMO_2HS_PRODUCT_ID 265 |
| #define USB_MEMO_PRO_2HS_V2_PRODUCT_ID 266 |
| #define USB_HYBRID_CANLIN_PRODUCT_ID 267 |
| #define USB_ATI_USBCAN_PRO_2HS_V2_PRODUCT_ID 268 |
| #define USB_ATI_MEMO_PRO_2HS_V2_PRODUCT_ID 269 |
| #define USB_HYBRID_PRO_CANLIN_PRODUCT_ID 270 |
| |
| static inline bool kvaser_is_leaf(const struct usb_device_id *id) |
| { |
| return (id->idProduct >= USB_LEAF_DEVEL_PRODUCT_ID && |
| id->idProduct <= USB_CAN_R_PRODUCT_ID) || |
| (id->idProduct >= USB_LEAF_LITE_V2_PRODUCT_ID && |
| id->idProduct <= USB_MINI_PCIE_2HS_PRODUCT_ID); |
| } |
| |
| static inline bool kvaser_is_usbcan(const struct usb_device_id *id) |
| { |
| return id->idProduct >= USB_USBCAN_REVB_PRODUCT_ID && |
| id->idProduct <= USB_MEMORATOR_PRODUCT_ID; |
| } |
| |
| static inline bool kvaser_is_hydra(const struct usb_device_id *id) |
| { |
| return id->idProduct >= USB_BLACKBIRD_V2_PRODUCT_ID && |
| id->idProduct <= USB_HYBRID_PRO_CANLIN_PRODUCT_ID; |
| } |
| |
| static const struct usb_device_id kvaser_usb_table[] = { |
| /* Leaf USB product IDs */ |
| { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_DEVEL_PRODUCT_ID) }, |
| { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_LITE_PRODUCT_ID) }, |
| { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_PRO_PRODUCT_ID), |
| .driver_info = KVASER_USB_HAS_TXRX_ERRORS | |
| KVASER_USB_HAS_SILENT_MODE }, |
| { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_SPRO_PRODUCT_ID), |
| .driver_info = KVASER_USB_HAS_TXRX_ERRORS | |
| KVASER_USB_HAS_SILENT_MODE }, |
| { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_PRO_LS_PRODUCT_ID), |
| .driver_info = KVASER_USB_HAS_TXRX_ERRORS | |
| KVASER_USB_HAS_SILENT_MODE }, |
| { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_PRO_SWC_PRODUCT_ID), |
| .driver_info = KVASER_USB_HAS_TXRX_ERRORS | |
| KVASER_USB_HAS_SILENT_MODE }, |
| { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_PRO_LIN_PRODUCT_ID), |
| .driver_info = KVASER_USB_HAS_TXRX_ERRORS | |
| KVASER_USB_HAS_SILENT_MODE }, |
| { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_SPRO_LS_PRODUCT_ID), |
| .driver_info = KVASER_USB_HAS_TXRX_ERRORS | |
| KVASER_USB_HAS_SILENT_MODE }, |
| { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_SPRO_SWC_PRODUCT_ID), |
| .driver_info = KVASER_USB_HAS_TXRX_ERRORS | |
| KVASER_USB_HAS_SILENT_MODE }, |
| { USB_DEVICE(KVASER_VENDOR_ID, USB_MEMO2_DEVEL_PRODUCT_ID), |
| .driver_info = KVASER_USB_HAS_TXRX_ERRORS | |
| KVASER_USB_HAS_SILENT_MODE }, |
| { USB_DEVICE(KVASER_VENDOR_ID, USB_MEMO2_HSHS_PRODUCT_ID), |
| .driver_info = KVASER_USB_HAS_TXRX_ERRORS | |
| KVASER_USB_HAS_SILENT_MODE }, |
| { USB_DEVICE(KVASER_VENDOR_ID, USB_UPRO_HSHS_PRODUCT_ID), |
| .driver_info = KVASER_USB_HAS_TXRX_ERRORS }, |
| { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_LITE_GI_PRODUCT_ID) }, |
| { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_PRO_OBDII_PRODUCT_ID), |
| .driver_info = KVASER_USB_HAS_TXRX_ERRORS | |
| KVASER_USB_HAS_SILENT_MODE }, |
| { USB_DEVICE(KVASER_VENDOR_ID, USB_MEMO2_HSLS_PRODUCT_ID), |
| .driver_info = KVASER_USB_HAS_TXRX_ERRORS }, |
| { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_LITE_CH_PRODUCT_ID), |
| .driver_info = KVASER_USB_HAS_TXRX_ERRORS }, |
| { USB_DEVICE(KVASER_VENDOR_ID, USB_BLACKBIRD_SPRO_PRODUCT_ID), |
| .driver_info = KVASER_USB_HAS_TXRX_ERRORS }, |
| { USB_DEVICE(KVASER_VENDOR_ID, USB_OEM_MERCURY_PRODUCT_ID), |
| .driver_info = KVASER_USB_HAS_TXRX_ERRORS }, |
| { USB_DEVICE(KVASER_VENDOR_ID, USB_OEM_LEAF_PRODUCT_ID), |
| .driver_info = KVASER_USB_HAS_TXRX_ERRORS }, |
| { USB_DEVICE(KVASER_VENDOR_ID, USB_CAN_R_PRODUCT_ID), |
| .driver_info = KVASER_USB_HAS_TXRX_ERRORS }, |
| { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_LITE_V2_PRODUCT_ID) }, |
| { USB_DEVICE(KVASER_VENDOR_ID, USB_MINI_PCIE_HS_PRODUCT_ID) }, |
| { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_LIGHT_HS_V2_OEM_PRODUCT_ID) }, |
| { USB_DEVICE(KVASER_VENDOR_ID, USB_USBCAN_LIGHT_2HS_PRODUCT_ID) }, |
| { USB_DEVICE(KVASER_VENDOR_ID, USB_MINI_PCIE_2HS_PRODUCT_ID) }, |
| |
| /* USBCANII USB product IDs */ |
| { USB_DEVICE(KVASER_VENDOR_ID, USB_USBCAN2_PRODUCT_ID), |
| .driver_info = KVASER_USB_HAS_TXRX_ERRORS }, |
| { USB_DEVICE(KVASER_VENDOR_ID, USB_USBCAN_REVB_PRODUCT_ID), |
| .driver_info = KVASER_USB_HAS_TXRX_ERRORS }, |
| { USB_DEVICE(KVASER_VENDOR_ID, USB_MEMORATOR_PRODUCT_ID), |
| .driver_info = KVASER_USB_HAS_TXRX_ERRORS }, |
| { USB_DEVICE(KVASER_VENDOR_ID, USB_VCI2_PRODUCT_ID), |
| .driver_info = KVASER_USB_HAS_TXRX_ERRORS }, |
| |
| /* Minihydra USB product IDs */ |
| { USB_DEVICE(KVASER_VENDOR_ID, USB_BLACKBIRD_V2_PRODUCT_ID) }, |
| { USB_DEVICE(KVASER_VENDOR_ID, USB_MEMO_PRO_5HS_PRODUCT_ID) }, |
| { USB_DEVICE(KVASER_VENDOR_ID, USB_USBCAN_PRO_5HS_PRODUCT_ID) }, |
| { USB_DEVICE(KVASER_VENDOR_ID, USB_USBCAN_LIGHT_4HS_PRODUCT_ID) }, |
| { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_PRO_HS_V2_PRODUCT_ID) }, |
| { USB_DEVICE(KVASER_VENDOR_ID, USB_USBCAN_PRO_2HS_V2_PRODUCT_ID) }, |
| { USB_DEVICE(KVASER_VENDOR_ID, USB_MEMO_2HS_PRODUCT_ID) }, |
| { USB_DEVICE(KVASER_VENDOR_ID, USB_MEMO_PRO_2HS_V2_PRODUCT_ID) }, |
| { USB_DEVICE(KVASER_VENDOR_ID, USB_HYBRID_CANLIN_PRODUCT_ID) }, |
| { USB_DEVICE(KVASER_VENDOR_ID, USB_ATI_USBCAN_PRO_2HS_V2_PRODUCT_ID) }, |
| { USB_DEVICE(KVASER_VENDOR_ID, USB_ATI_MEMO_PRO_2HS_V2_PRODUCT_ID) }, |
| { USB_DEVICE(KVASER_VENDOR_ID, USB_HYBRID_PRO_CANLIN_PRODUCT_ID) }, |
| { } |
| }; |
| MODULE_DEVICE_TABLE(usb, kvaser_usb_table); |
| |
| int kvaser_usb_send_cmd(const struct kvaser_usb *dev, void *cmd, int len) |
| { |
| int actual_len; /* Not used */ |
| |
| return usb_bulk_msg(dev->udev, |
| usb_sndbulkpipe(dev->udev, |
| dev->bulk_out->bEndpointAddress), |
| cmd, len, &actual_len, KVASER_USB_TIMEOUT); |
| } |
| |
| int kvaser_usb_recv_cmd(const struct kvaser_usb *dev, void *cmd, int len, |
| int *actual_len) |
| { |
| return usb_bulk_msg(dev->udev, |
| usb_rcvbulkpipe(dev->udev, |
| dev->bulk_in->bEndpointAddress), |
| cmd, len, actual_len, KVASER_USB_TIMEOUT); |
| } |
| |
| static void kvaser_usb_send_cmd_callback(struct urb *urb) |
| { |
| struct net_device *netdev = urb->context; |
| |
| kfree(urb->transfer_buffer); |
| |
| if (urb->status) |
| netdev_warn(netdev, "urb status received: %d\n", urb->status); |
| } |
| |
| int kvaser_usb_send_cmd_async(struct kvaser_usb_net_priv *priv, void *cmd, |
| int len) |
| { |
| struct kvaser_usb *dev = priv->dev; |
| struct net_device *netdev = priv->netdev; |
| struct urb *urb; |
| int err; |
| |
| urb = usb_alloc_urb(0, GFP_ATOMIC); |
| if (!urb) |
| return -ENOMEM; |
| |
| usb_fill_bulk_urb(urb, dev->udev, |
| usb_sndbulkpipe(dev->udev, |
| dev->bulk_out->bEndpointAddress), |
| cmd, len, kvaser_usb_send_cmd_callback, netdev); |
| usb_anchor_urb(urb, &priv->tx_submitted); |
| |
| err = usb_submit_urb(urb, GFP_ATOMIC); |
| if (err) { |
| netdev_err(netdev, "Error transmitting URB\n"); |
| usb_unanchor_urb(urb); |
| } |
| usb_free_urb(urb); |
| |
| return 0; |
| } |
| |
| int kvaser_usb_can_rx_over_error(struct net_device *netdev) |
| { |
| struct net_device_stats *stats = &netdev->stats; |
| struct can_frame *cf; |
| struct sk_buff *skb; |
| |
| stats->rx_over_errors++; |
| stats->rx_errors++; |
| |
| skb = alloc_can_err_skb(netdev, &cf); |
| if (!skb) { |
| stats->rx_dropped++; |
| netdev_warn(netdev, "No memory left for err_skb\n"); |
| return -ENOMEM; |
| } |
| |
| cf->can_id |= CAN_ERR_CRTL; |
| cf->data[1] = CAN_ERR_CRTL_RX_OVERFLOW; |
| |
| stats->rx_packets++; |
| stats->rx_bytes += cf->can_dlc; |
| netif_rx(skb); |
| |
| return 0; |
| } |
| |
| static void kvaser_usb_read_bulk_callback(struct urb *urb) |
| { |
| struct kvaser_usb *dev = urb->context; |
| int err; |
| unsigned int i; |
| |
| switch (urb->status) { |
| case 0: |
| break; |
| case -ENOENT: |
| case -EPIPE: |
| case -EPROTO: |
| case -ESHUTDOWN: |
| return; |
| default: |
| dev_info(&dev->intf->dev, "Rx URB aborted (%d)\n", urb->status); |
| goto resubmit_urb; |
| } |
| |
| dev->ops->dev_read_bulk_callback(dev, urb->transfer_buffer, |
| urb->actual_length); |
| |
| resubmit_urb: |
| usb_fill_bulk_urb(urb, dev->udev, |
| usb_rcvbulkpipe(dev->udev, |
| dev->bulk_in->bEndpointAddress), |
| urb->transfer_buffer, KVASER_USB_RX_BUFFER_SIZE, |
| kvaser_usb_read_bulk_callback, dev); |
| |
| err = usb_submit_urb(urb, GFP_ATOMIC); |
| if (err == -ENODEV) { |
| for (i = 0; i < dev->nchannels; i++) { |
| if (!dev->nets[i]) |
| continue; |
| |
| netif_device_detach(dev->nets[i]->netdev); |
| } |
| } else if (err) { |
| dev_err(&dev->intf->dev, |
| "Failed resubmitting read bulk urb: %d\n", err); |
| } |
| } |
| |
| static int kvaser_usb_setup_rx_urbs(struct kvaser_usb *dev) |
| { |
| int i, err = 0; |
| |
| if (dev->rxinitdone) |
| return 0; |
| |
| for (i = 0; i < KVASER_USB_MAX_RX_URBS; i++) { |
| struct urb *urb = NULL; |
| u8 *buf = NULL; |
| dma_addr_t buf_dma; |
| |
| urb = usb_alloc_urb(0, GFP_KERNEL); |
| if (!urb) { |
| err = -ENOMEM; |
| break; |
| } |
| |
| buf = usb_alloc_coherent(dev->udev, KVASER_USB_RX_BUFFER_SIZE, |
| GFP_KERNEL, &buf_dma); |
| if (!buf) { |
| dev_warn(&dev->intf->dev, |
| "No memory left for USB buffer\n"); |
| usb_free_urb(urb); |
| err = -ENOMEM; |
| break; |
| } |
| |
| usb_fill_bulk_urb(urb, dev->udev, |
| usb_rcvbulkpipe |
| (dev->udev, |
| dev->bulk_in->bEndpointAddress), |
| buf, KVASER_USB_RX_BUFFER_SIZE, |
| kvaser_usb_read_bulk_callback, dev); |
| urb->transfer_dma = buf_dma; |
| urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; |
| usb_anchor_urb(urb, &dev->rx_submitted); |
| |
| err = usb_submit_urb(urb, GFP_KERNEL); |
| if (err) { |
| usb_unanchor_urb(urb); |
| usb_free_coherent(dev->udev, |
| KVASER_USB_RX_BUFFER_SIZE, buf, |
| buf_dma); |
| usb_free_urb(urb); |
| break; |
| } |
| |
| dev->rxbuf[i] = buf; |
| dev->rxbuf_dma[i] = buf_dma; |
| |
| usb_free_urb(urb); |
| } |
| |
| if (i == 0) { |
| dev_warn(&dev->intf->dev, "Cannot setup read URBs, error %d\n", |
| err); |
| return err; |
| } else if (i < KVASER_USB_MAX_RX_URBS) { |
| dev_warn(&dev->intf->dev, "RX performances may be slow\n"); |
| } |
| |
| dev->rxinitdone = true; |
| |
| return 0; |
| } |
| |
| static int kvaser_usb_open(struct net_device *netdev) |
| { |
| struct kvaser_usb_net_priv *priv = netdev_priv(netdev); |
| struct kvaser_usb *dev = priv->dev; |
| int err; |
| |
| err = open_candev(netdev); |
| if (err) |
| return err; |
| |
| err = kvaser_usb_setup_rx_urbs(dev); |
| if (err) |
| goto error; |
| |
| err = dev->ops->dev_set_opt_mode(priv); |
| if (err) |
| goto error; |
| |
| err = dev->ops->dev_start_chip(priv); |
| if (err) { |
| netdev_warn(netdev, "Cannot start device, error %d\n", err); |
| goto error; |
| } |
| |
| priv->can.state = CAN_STATE_ERROR_ACTIVE; |
| |
| return 0; |
| |
| error: |
| close_candev(netdev); |
| return err; |
| } |
| |
| static void kvaser_usb_reset_tx_urb_contexts(struct kvaser_usb_net_priv *priv) |
| { |
| int i, max_tx_urbs; |
| |
| max_tx_urbs = priv->dev->max_tx_urbs; |
| |
| priv->active_tx_contexts = 0; |
| for (i = 0; i < max_tx_urbs; i++) |
| priv->tx_contexts[i].echo_index = max_tx_urbs; |
| } |
| |
| /* This method might sleep. Do not call it in the atomic context |
| * of URB completions. |
| */ |
| static void kvaser_usb_unlink_tx_urbs(struct kvaser_usb_net_priv *priv) |
| { |
| usb_kill_anchored_urbs(&priv->tx_submitted); |
| kvaser_usb_reset_tx_urb_contexts(priv); |
| } |
| |
| static void kvaser_usb_unlink_all_urbs(struct kvaser_usb *dev) |
| { |
| int i; |
| |
| usb_kill_anchored_urbs(&dev->rx_submitted); |
| |
| for (i = 0; i < KVASER_USB_MAX_RX_URBS; i++) |
| usb_free_coherent(dev->udev, KVASER_USB_RX_BUFFER_SIZE, |
| dev->rxbuf[i], dev->rxbuf_dma[i]); |
| |
| for (i = 0; i < dev->nchannels; i++) { |
| struct kvaser_usb_net_priv *priv = dev->nets[i]; |
| |
| if (priv) |
| kvaser_usb_unlink_tx_urbs(priv); |
| } |
| } |
| |
| static int kvaser_usb_close(struct net_device *netdev) |
| { |
| struct kvaser_usb_net_priv *priv = netdev_priv(netdev); |
| struct kvaser_usb *dev = priv->dev; |
| int err; |
| |
| netif_stop_queue(netdev); |
| |
| err = dev->ops->dev_flush_queue(priv); |
| if (err) |
| netdev_warn(netdev, "Cannot flush queue, error %d\n", err); |
| |
| if (dev->ops->dev_reset_chip) { |
| err = dev->ops->dev_reset_chip(dev, priv->channel); |
| if (err) |
| netdev_warn(netdev, "Cannot reset card, error %d\n", |
| err); |
| } |
| |
| err = dev->ops->dev_stop_chip(priv); |
| if (err) |
| netdev_warn(netdev, "Cannot stop device, error %d\n", err); |
| |
| /* reset tx contexts */ |
| kvaser_usb_unlink_tx_urbs(priv); |
| |
| priv->can.state = CAN_STATE_STOPPED; |
| close_candev(priv->netdev); |
| |
| return 0; |
| } |
| |
| static void kvaser_usb_write_bulk_callback(struct urb *urb) |
| { |
| struct kvaser_usb_tx_urb_context *context = urb->context; |
| struct kvaser_usb_net_priv *priv; |
| struct net_device *netdev; |
| |
| if (WARN_ON(!context)) |
| return; |
| |
| priv = context->priv; |
| netdev = priv->netdev; |
| |
| kfree(urb->transfer_buffer); |
| |
| if (!netif_device_present(netdev)) |
| return; |
| |
| if (urb->status) |
| netdev_info(netdev, "Tx URB aborted (%d)\n", urb->status); |
| } |
| |
| static netdev_tx_t kvaser_usb_start_xmit(struct sk_buff *skb, |
| struct net_device *netdev) |
| { |
| struct kvaser_usb_net_priv *priv = netdev_priv(netdev); |
| struct kvaser_usb *dev = priv->dev; |
| struct net_device_stats *stats = &netdev->stats; |
| struct kvaser_usb_tx_urb_context *context = NULL; |
| struct urb *urb; |
| void *buf; |
| int cmd_len = 0; |
| int err, ret = NETDEV_TX_OK; |
| unsigned int i; |
| unsigned long flags; |
| |
| if (can_dropped_invalid_skb(netdev, skb)) |
| return NETDEV_TX_OK; |
| |
| urb = usb_alloc_urb(0, GFP_ATOMIC); |
| if (!urb) { |
| stats->tx_dropped++; |
| dev_kfree_skb(skb); |
| return NETDEV_TX_OK; |
| } |
| |
| spin_lock_irqsave(&priv->tx_contexts_lock, flags); |
| for (i = 0; i < dev->max_tx_urbs; i++) { |
| if (priv->tx_contexts[i].echo_index == dev->max_tx_urbs) { |
| context = &priv->tx_contexts[i]; |
| |
| context->echo_index = i; |
| ++priv->active_tx_contexts; |
| if (priv->active_tx_contexts >= (int)dev->max_tx_urbs) |
| netif_stop_queue(netdev); |
| |
| break; |
| } |
| } |
| spin_unlock_irqrestore(&priv->tx_contexts_lock, flags); |
| |
| /* This should never happen; it implies a flow control bug */ |
| if (!context) { |
| netdev_warn(netdev, "cannot find free context\n"); |
| |
| ret = NETDEV_TX_BUSY; |
| goto freeurb; |
| } |
| |
| buf = dev->ops->dev_frame_to_cmd(priv, skb, &context->dlc, &cmd_len, |
| context->echo_index); |
| if (!buf) { |
| stats->tx_dropped++; |
| dev_kfree_skb(skb); |
| spin_lock_irqsave(&priv->tx_contexts_lock, flags); |
| |
| context->echo_index = dev->max_tx_urbs; |
| --priv->active_tx_contexts; |
| netif_wake_queue(netdev); |
| |
| spin_unlock_irqrestore(&priv->tx_contexts_lock, flags); |
| goto freeurb; |
| } |
| |
| context->priv = priv; |
| |
| can_put_echo_skb(skb, netdev, context->echo_index); |
| |
| usb_fill_bulk_urb(urb, dev->udev, |
| usb_sndbulkpipe(dev->udev, |
| dev->bulk_out->bEndpointAddress), |
| buf, cmd_len, kvaser_usb_write_bulk_callback, |
| context); |
| usb_anchor_urb(urb, &priv->tx_submitted); |
| |
| err = usb_submit_urb(urb, GFP_ATOMIC); |
| if (unlikely(err)) { |
| spin_lock_irqsave(&priv->tx_contexts_lock, flags); |
| |
| can_free_echo_skb(netdev, context->echo_index); |
| context->echo_index = dev->max_tx_urbs; |
| --priv->active_tx_contexts; |
| netif_wake_queue(netdev); |
| |
| spin_unlock_irqrestore(&priv->tx_contexts_lock, flags); |
| |
| usb_unanchor_urb(urb); |
| kfree(buf); |
| |
| stats->tx_dropped++; |
| |
| if (err == -ENODEV) |
| netif_device_detach(netdev); |
| else |
| netdev_warn(netdev, "Failed tx_urb %d\n", err); |
| |
| goto freeurb; |
| } |
| |
| ret = NETDEV_TX_OK; |
| |
| freeurb: |
| usb_free_urb(urb); |
| return ret; |
| } |
| |
| static const struct net_device_ops kvaser_usb_netdev_ops = { |
| .ndo_open = kvaser_usb_open, |
| .ndo_stop = kvaser_usb_close, |
| .ndo_start_xmit = kvaser_usb_start_xmit, |
| .ndo_change_mtu = can_change_mtu, |
| }; |
| |
| static void kvaser_usb_remove_interfaces(struct kvaser_usb *dev) |
| { |
| int i; |
| |
| for (i = 0; i < dev->nchannels; i++) { |
| if (!dev->nets[i]) |
| continue; |
| |
| unregister_candev(dev->nets[i]->netdev); |
| } |
| |
| kvaser_usb_unlink_all_urbs(dev); |
| |
| for (i = 0; i < dev->nchannels; i++) { |
| if (!dev->nets[i]) |
| continue; |
| |
| free_candev(dev->nets[i]->netdev); |
| } |
| } |
| |
| static int kvaser_usb_init_one(struct kvaser_usb *dev, |
| const struct usb_device_id *id, int channel) |
| { |
| struct net_device *netdev; |
| struct kvaser_usb_net_priv *priv; |
| int err; |
| |
| if (dev->ops->dev_reset_chip) { |
| err = dev->ops->dev_reset_chip(dev, channel); |
| if (err) |
| return err; |
| } |
| |
| netdev = alloc_candev(struct_size(priv, tx_contexts, dev->max_tx_urbs), |
| dev->max_tx_urbs); |
| if (!netdev) { |
| dev_err(&dev->intf->dev, "Cannot alloc candev\n"); |
| return -ENOMEM; |
| } |
| |
| priv = netdev_priv(netdev); |
| |
| init_usb_anchor(&priv->tx_submitted); |
| init_completion(&priv->start_comp); |
| init_completion(&priv->stop_comp); |
| priv->can.ctrlmode_supported = 0; |
| |
| priv->dev = dev; |
| priv->netdev = netdev; |
| priv->channel = channel; |
| |
| spin_lock_init(&priv->tx_contexts_lock); |
| kvaser_usb_reset_tx_urb_contexts(priv); |
| |
| priv->can.state = CAN_STATE_STOPPED; |
| priv->can.clock.freq = dev->cfg->clock.freq; |
| priv->can.bittiming_const = dev->cfg->bittiming_const; |
| priv->can.do_set_bittiming = dev->ops->dev_set_bittiming; |
| priv->can.do_set_mode = dev->ops->dev_set_mode; |
| if ((id->driver_info & KVASER_USB_HAS_TXRX_ERRORS) || |
| (priv->dev->card_data.capabilities & KVASER_USB_CAP_BERR_CAP)) |
| priv->can.do_get_berr_counter = dev->ops->dev_get_berr_counter; |
| if (id->driver_info & KVASER_USB_HAS_SILENT_MODE) |
| priv->can.ctrlmode_supported |= CAN_CTRLMODE_LISTENONLY; |
| |
| priv->can.ctrlmode_supported |= dev->card_data.ctrlmode_supported; |
| |
| if (priv->can.ctrlmode_supported & CAN_CTRLMODE_FD) { |
| priv->can.data_bittiming_const = dev->cfg->data_bittiming_const; |
| priv->can.do_set_data_bittiming = |
| dev->ops->dev_set_data_bittiming; |
| } |
| |
| netdev->flags |= IFF_ECHO; |
| |
| netdev->netdev_ops = &kvaser_usb_netdev_ops; |
| |
| SET_NETDEV_DEV(netdev, &dev->intf->dev); |
| netdev->dev_id = channel; |
| |
| dev->nets[channel] = priv; |
| |
| err = register_candev(netdev); |
| if (err) { |
| dev_err(&dev->intf->dev, "Failed to register CAN device\n"); |
| free_candev(netdev); |
| dev->nets[channel] = NULL; |
| return err; |
| } |
| |
| netdev_dbg(netdev, "device registered\n"); |
| |
| return 0; |
| } |
| |
| static int kvaser_usb_probe(struct usb_interface *intf, |
| const struct usb_device_id *id) |
| { |
| struct kvaser_usb *dev; |
| int err; |
| int i; |
| |
| dev = devm_kzalloc(&intf->dev, sizeof(*dev), GFP_KERNEL); |
| if (!dev) |
| return -ENOMEM; |
| |
| if (kvaser_is_leaf(id)) { |
| dev->card_data.leaf.family = KVASER_LEAF; |
| dev->ops = &kvaser_usb_leaf_dev_ops; |
| } else if (kvaser_is_usbcan(id)) { |
| dev->card_data.leaf.family = KVASER_USBCAN; |
| dev->ops = &kvaser_usb_leaf_dev_ops; |
| } else if (kvaser_is_hydra(id)) { |
| dev->ops = &kvaser_usb_hydra_dev_ops; |
| } else { |
| dev_err(&intf->dev, |
| "Product ID (%d) is not a supported Kvaser USB device\n", |
| id->idProduct); |
| return -ENODEV; |
| } |
| |
| dev->intf = intf; |
| |
| err = dev->ops->dev_setup_endpoints(dev); |
| if (err) { |
| dev_err(&intf->dev, "Cannot get usb endpoint(s)"); |
| return err; |
| } |
| |
| dev->udev = interface_to_usbdev(intf); |
| |
| init_usb_anchor(&dev->rx_submitted); |
| |
| usb_set_intfdata(intf, dev); |
| |
| dev->card_data.ctrlmode_supported = 0; |
| dev->card_data.capabilities = 0; |
| err = dev->ops->dev_init_card(dev); |
| if (err) { |
| dev_err(&intf->dev, |
| "Failed to initialize card, error %d\n", err); |
| return err; |
| } |
| |
| err = dev->ops->dev_get_software_info(dev); |
| if (err) { |
| dev_err(&intf->dev, |
| "Cannot get software info, error %d\n", err); |
| return err; |
| } |
| |
| if (dev->ops->dev_get_software_details) { |
| err = dev->ops->dev_get_software_details(dev); |
| if (err) { |
| dev_err(&intf->dev, |
| "Cannot get software details, error %d\n", err); |
| return err; |
| } |
| } |
| |
| if (WARN_ON(!dev->cfg)) |
| return -ENODEV; |
| |
| dev_dbg(&intf->dev, "Firmware version: %d.%d.%d\n", |
| ((dev->fw_version >> 24) & 0xff), |
| ((dev->fw_version >> 16) & 0xff), |
| (dev->fw_version & 0xffff)); |
| |
| dev_dbg(&intf->dev, "Max outstanding tx = %d URBs\n", dev->max_tx_urbs); |
| |
| err = dev->ops->dev_get_card_info(dev); |
| if (err) { |
| dev_err(&intf->dev, "Cannot get card info, error %d\n", err); |
| return err; |
| } |
| |
| if (dev->ops->dev_get_capabilities) { |
| err = dev->ops->dev_get_capabilities(dev); |
| if (err) { |
| dev_err(&intf->dev, |
| "Cannot get capabilities, error %d\n", err); |
| kvaser_usb_remove_interfaces(dev); |
| return err; |
| } |
| } |
| |
| for (i = 0; i < dev->nchannels; i++) { |
| err = kvaser_usb_init_one(dev, id, i); |
| if (err) { |
| kvaser_usb_remove_interfaces(dev); |
| return err; |
| } |
| } |
| |
| return 0; |
| } |
| |
| static void kvaser_usb_disconnect(struct usb_interface *intf) |
| { |
| struct kvaser_usb *dev = usb_get_intfdata(intf); |
| |
| usb_set_intfdata(intf, NULL); |
| |
| if (!dev) |
| return; |
| |
| kvaser_usb_remove_interfaces(dev); |
| } |
| |
| static struct usb_driver kvaser_usb_driver = { |
| .name = "kvaser_usb", |
| .probe = kvaser_usb_probe, |
| .disconnect = kvaser_usb_disconnect, |
| .id_table = kvaser_usb_table, |
| }; |
| |
| module_usb_driver(kvaser_usb_driver); |
| |
| MODULE_AUTHOR("Olivier Sobrie <olivier@sobrie.be>"); |
| MODULE_AUTHOR("Kvaser AB <support@kvaser.com>"); |
| MODULE_DESCRIPTION("CAN driver for Kvaser CAN/USB devices"); |
| MODULE_LICENSE("GPL v2"); |