// 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(sizeof(*priv) +
|
dev->max_tx_urbs * sizeof(*priv->tx_contexts),
|
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");
|
