mirror of https://gitee.com/openkylin/linux.git
can: kvaser_usb: Split driver into kvaser_usb_core.c and kvaser_usb_leaf.c
First part of adding support for Kvaser USB device family "hydra".
Split kvaser_usb.c into kvaser_usb/kvaser_usb{.h,_core.c,_leaf.c}.
kvaser_usb_core.c contains common functionality, such as USB
writing/reading and allocation of netdev.
kvaser_usb_leaf.c contains device specific code, used in
kvaser_usb_core.c.
struct kvaser_usb_dev_ops contains device specific functions that are
common for all devices in the family. While, struct kvaser_usb_dev_cfg
describes the device configurations in terms of CAN clock frequency,
timestamp frequency and CAN controller bittiming constants.
Signed-off-by: Jimmy Assarsson <extja@kvaser.com>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
This commit is contained in:
Jimmy Assarsson
Marc Kleine-Budde
parent
e0543f2479
commit
7259124eac
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@ -7,7 +7,7 @@ obj-$(CONFIG_CAN_8DEV_USB) += usb_8dev.o
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obj-$(CONFIG_CAN_EMS_USB) += ems_usb.o
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obj-$(CONFIG_CAN_ESD_USB2) += esd_usb2.o
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obj-$(CONFIG_CAN_GS_USB) += gs_usb.o
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obj-$(CONFIG_CAN_KVASER_USB) += kvaser_usb.o
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obj-$(CONFIG_CAN_KVASER_USB) += kvaser_usb/
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obj-$(CONFIG_CAN_MCBA_USB) += mcba_usb.o
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obj-$(CONFIG_CAN_PEAK_USB) += peak_usb/
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obj-$(CONFIG_CAN_UCAN) += ucan.o
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File diff suppressed because it is too large
Load Diff
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@ -0,0 +1,2 @@
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obj-$(CONFIG_CAN_KVASER_USB) += kvaser_usb.o
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kvaser_usb-y = kvaser_usb_core.o kvaser_usb_leaf.o
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@ -0,0 +1,158 @@
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/* SPDX-License-Identifier: GPL-2.0 */
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/* Parts of this driver are based on the following:
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* - Kvaser linux leaf driver (version 4.78)
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* - CAN driver for esd CAN-USB/2
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* - Kvaser linux usbcanII driver (version 5.3)
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*
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* Copyright (C) 2002-2018 KVASER AB, Sweden. All rights reserved.
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* Copyright (C) 2010 Matthias Fuchs <matthias.fuchs@esd.eu>, esd gmbh
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* Copyright (C) 2012 Olivier Sobrie <olivier@sobrie.be>
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* Copyright (C) 2015 Valeo S.A.
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*/
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#ifndef KVASER_USB_H
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#define KVASER_USB_H
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/* Kvaser USB CAN dongles are divided into two major families:
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* - Leaf: Based on Renesas M32C, running firmware labeled as 'filo'
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* - UsbcanII: Based on Renesas M16C, running firmware labeled as 'helios'
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*/
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#include <linux/completion.h>
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#include <linux/spinlock.h>
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#include <linux/types.h>
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#include <linux/usb.h>
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#include <linux/can.h>
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#include <linux/can/dev.h>
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#define KVASER_USB_MAX_RX_URBS 4
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#define KVASER_USB_MAX_TX_URBS 128
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#define KVASER_USB_TIMEOUT 1000 /* msecs */
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#define KVASER_USB_RX_BUFFER_SIZE 3072
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#define KVASER_USB_MAX_NET_DEVICES 3
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/* USB devices features */
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#define KVASER_USB_HAS_SILENT_MODE BIT(0)
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#define KVASER_USB_HAS_TXRX_ERRORS BIT(1)
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struct kvaser_usb_dev_cfg;
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enum kvaser_usb_leaf_family {
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KVASER_LEAF,
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KVASER_USBCAN,
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};
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struct kvaser_usb_dev_card_data {
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u32 ctrlmode_supported;
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struct {
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enum kvaser_usb_leaf_family family;
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} leaf;
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};
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/* Context for an outstanding, not yet ACKed, transmission */
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struct kvaser_usb_tx_urb_context {
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struct kvaser_usb_net_priv *priv;
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u32 echo_index;
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int dlc;
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};
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struct kvaser_usb {
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struct usb_device *udev;
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struct usb_interface *intf;
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struct kvaser_usb_net_priv *nets[KVASER_USB_MAX_NET_DEVICES];
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const struct kvaser_usb_dev_ops *ops;
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const struct kvaser_usb_dev_cfg *cfg;
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struct usb_endpoint_descriptor *bulk_in, *bulk_out;
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struct usb_anchor rx_submitted;
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/* @max_tx_urbs: Firmware-reported maximum number of outstanding,
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* not yet ACKed, transmissions on this device. This value is
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* also used as a sentinel for marking free tx contexts.
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*/
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u32 fw_version;
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unsigned int nchannels;
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unsigned int max_tx_urbs;
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struct kvaser_usb_dev_card_data card_data;
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bool rxinitdone;
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void *rxbuf[KVASER_USB_MAX_RX_URBS];
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dma_addr_t rxbuf_dma[KVASER_USB_MAX_RX_URBS];
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};
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struct kvaser_usb_net_priv {
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struct can_priv can;
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struct can_berr_counter bec;
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struct kvaser_usb *dev;
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struct net_device *netdev;
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int channel;
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struct completion start_comp, stop_comp;
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struct usb_anchor tx_submitted;
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spinlock_t tx_contexts_lock; /* lock for active_tx_contexts */
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int active_tx_contexts;
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struct kvaser_usb_tx_urb_context tx_contexts[];
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};
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/**
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* struct kvaser_usb_dev_ops - Device specific functions
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* @dev_set_mode: used for can.do_set_mode
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* @dev_set_bittiming: used for can.do_set_bittiming
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* @dev_get_berr_counter: used for can.do_get_berr_counter
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*
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* @dev_setup_endpoints: setup USB in and out endpoints
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* @dev_init_card: initialize card
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* @dev_get_software_info: get software info
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* @dev_get_card_info: get card info
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*
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* @dev_set_opt_mode: set ctrlmod
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* @dev_start_chip: start the CAN controller
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* @dev_stop_chip: stop the CAN controller
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* @dev_reset_chip: reset the CAN controller
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* @dev_flush_queue: flush outstanding CAN messages
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* @dev_read_bulk_callback: handle incoming commands
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* @dev_frame_to_cmd: translate struct can_frame into device command
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*/
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struct kvaser_usb_dev_ops {
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int (*dev_set_mode)(struct net_device *netdev, enum can_mode mode);
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int (*dev_set_bittiming)(struct net_device *netdev);
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int (*dev_get_berr_counter)(const struct net_device *netdev,
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struct can_berr_counter *bec);
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int (*dev_setup_endpoints)(struct kvaser_usb *dev);
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int (*dev_init_card)(struct kvaser_usb *dev);
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int (*dev_get_software_info)(struct kvaser_usb *dev);
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int (*dev_get_card_info)(struct kvaser_usb *dev);
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int (*dev_set_opt_mode)(const struct kvaser_usb_net_priv *priv);
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int (*dev_start_chip)(struct kvaser_usb_net_priv *priv);
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int (*dev_stop_chip)(struct kvaser_usb_net_priv *priv);
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int (*dev_reset_chip)(struct kvaser_usb *dev, int channel);
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int (*dev_flush_queue)(struct kvaser_usb_net_priv *priv);
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void (*dev_read_bulk_callback)(struct kvaser_usb *dev, void *buf,
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int len);
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void *(*dev_frame_to_cmd)(const struct kvaser_usb_net_priv *priv,
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const struct sk_buff *skb, int *frame_len,
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int *cmd_len, u16 transid);
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};
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struct kvaser_usb_dev_cfg {
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const struct can_clock clock;
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const unsigned int timestamp_freq;
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const struct can_bittiming_const * const bittiming_const;
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const struct can_bittiming_const * const data_bittiming_const;
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};
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extern const struct kvaser_usb_dev_ops kvaser_usb_leaf_dev_ops;
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int kvaser_usb_recv_cmd(const struct kvaser_usb *dev, void *cmd, int len,
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int *actual_len);
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int kvaser_usb_send_cmd(const struct kvaser_usb *dev, void *cmd, int len);
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int kvaser_usb_send_cmd_async(struct kvaser_usb_net_priv *priv, void *cmd,
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int len);
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int kvaser_usb_can_rx_over_error(struct net_device *netdev);
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#endif /* KVASER_USB_H */
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@ -0,0 +1,769 @@
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// SPDX-License-Identifier: GPL-2.0
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/* Parts of this driver are based on the following:
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* - Kvaser linux leaf driver (version 4.78)
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* - CAN driver for esd CAN-USB/2
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* - Kvaser linux usbcanII driver (version 5.3)
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*
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* Copyright (C) 2002-2018 KVASER AB, Sweden. All rights reserved.
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* Copyright (C) 2010 Matthias Fuchs <matthias.fuchs@esd.eu>, esd gmbh
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* Copyright (C) 2012 Olivier Sobrie <olivier@sobrie.be>
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* Copyright (C) 2015 Valeo S.A.
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*/
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#include <linux/completion.h>
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#include <linux/device.h>
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#include <linux/gfp.h>
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#include <linux/if.h>
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/netdevice.h>
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#include <linux/spinlock.h>
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#include <linux/types.h>
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#include <linux/usb.h>
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#include <linux/can.h>
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#include <linux/can/dev.h>
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#include <linux/can/error.h>
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#include <linux/can/netlink.h>
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#include "kvaser_usb.h"
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/* Kvaser USB vendor id. */
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#define KVASER_VENDOR_ID 0x0bfd
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/* Kvaser Leaf USB devices product ids */
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#define USB_LEAF_DEVEL_PRODUCT_ID 10
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#define USB_LEAF_LITE_PRODUCT_ID 11
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#define USB_LEAF_PRO_PRODUCT_ID 12
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#define USB_LEAF_SPRO_PRODUCT_ID 14
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#define USB_LEAF_PRO_LS_PRODUCT_ID 15
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#define USB_LEAF_PRO_SWC_PRODUCT_ID 16
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#define USB_LEAF_PRO_LIN_PRODUCT_ID 17
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#define USB_LEAF_SPRO_LS_PRODUCT_ID 18
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#define USB_LEAF_SPRO_SWC_PRODUCT_ID 19
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#define USB_MEMO2_DEVEL_PRODUCT_ID 22
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#define USB_MEMO2_HSHS_PRODUCT_ID 23
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#define USB_UPRO_HSHS_PRODUCT_ID 24
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#define USB_LEAF_LITE_GI_PRODUCT_ID 25
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#define USB_LEAF_PRO_OBDII_PRODUCT_ID 26
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#define USB_MEMO2_HSLS_PRODUCT_ID 27
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#define USB_LEAF_LITE_CH_PRODUCT_ID 28
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#define USB_BLACKBIRD_SPRO_PRODUCT_ID 29
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#define USB_OEM_MERCURY_PRODUCT_ID 34
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#define USB_OEM_LEAF_PRODUCT_ID 35
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#define USB_CAN_R_PRODUCT_ID 39
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#define USB_LEAF_LITE_V2_PRODUCT_ID 288
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#define USB_MINI_PCIE_HS_PRODUCT_ID 289
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#define USB_LEAF_LIGHT_HS_V2_OEM_PRODUCT_ID 290
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#define USB_USBCAN_LIGHT_2HS_PRODUCT_ID 291
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#define USB_MINI_PCIE_2HS_PRODUCT_ID 292
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/* Kvaser USBCan-II devices product ids */
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#define USB_USBCAN_REVB_PRODUCT_ID 2
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#define USB_VCI2_PRODUCT_ID 3
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#define USB_USBCAN2_PRODUCT_ID 4
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#define USB_MEMORATOR_PRODUCT_ID 5
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static inline bool kvaser_is_leaf(const struct usb_device_id *id)
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{
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return id->idProduct >= USB_LEAF_DEVEL_PRODUCT_ID &&
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id->idProduct <= USB_MINI_PCIE_2HS_PRODUCT_ID;
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}
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static inline bool kvaser_is_usbcan(const struct usb_device_id *id)
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{
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return id->idProduct >= USB_USBCAN_REVB_PRODUCT_ID &&
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id->idProduct <= USB_MEMORATOR_PRODUCT_ID;
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}
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static const struct usb_device_id kvaser_usb_table[] = {
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/* Leaf USB product IDs */
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{ USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_DEVEL_PRODUCT_ID) },
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{ USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_LITE_PRODUCT_ID) },
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{ USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_PRO_PRODUCT_ID),
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.driver_info = KVASER_USB_HAS_TXRX_ERRORS |
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KVASER_USB_HAS_SILENT_MODE },
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{ USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_SPRO_PRODUCT_ID),
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.driver_info = KVASER_USB_HAS_TXRX_ERRORS |
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KVASER_USB_HAS_SILENT_MODE },
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{ USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_PRO_LS_PRODUCT_ID),
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.driver_info = KVASER_USB_HAS_TXRX_ERRORS |
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KVASER_USB_HAS_SILENT_MODE },
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{ USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_PRO_SWC_PRODUCT_ID),
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.driver_info = KVASER_USB_HAS_TXRX_ERRORS |
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KVASER_USB_HAS_SILENT_MODE },
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{ USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_PRO_LIN_PRODUCT_ID),
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.driver_info = KVASER_USB_HAS_TXRX_ERRORS |
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KVASER_USB_HAS_SILENT_MODE },
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{ USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_SPRO_LS_PRODUCT_ID),
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.driver_info = KVASER_USB_HAS_TXRX_ERRORS |
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KVASER_USB_HAS_SILENT_MODE },
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{ USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_SPRO_SWC_PRODUCT_ID),
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.driver_info = KVASER_USB_HAS_TXRX_ERRORS |
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KVASER_USB_HAS_SILENT_MODE },
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{ USB_DEVICE(KVASER_VENDOR_ID, USB_MEMO2_DEVEL_PRODUCT_ID),
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.driver_info = KVASER_USB_HAS_TXRX_ERRORS |
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KVASER_USB_HAS_SILENT_MODE },
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{ USB_DEVICE(KVASER_VENDOR_ID, USB_MEMO2_HSHS_PRODUCT_ID),
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.driver_info = KVASER_USB_HAS_TXRX_ERRORS |
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KVASER_USB_HAS_SILENT_MODE },
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{ USB_DEVICE(KVASER_VENDOR_ID, USB_UPRO_HSHS_PRODUCT_ID),
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.driver_info = KVASER_USB_HAS_TXRX_ERRORS },
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{ USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_LITE_GI_PRODUCT_ID) },
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{ USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_PRO_OBDII_PRODUCT_ID),
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.driver_info = KVASER_USB_HAS_TXRX_ERRORS |
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KVASER_USB_HAS_SILENT_MODE },
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{ USB_DEVICE(KVASER_VENDOR_ID, USB_MEMO2_HSLS_PRODUCT_ID),
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.driver_info = KVASER_USB_HAS_TXRX_ERRORS },
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{ USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_LITE_CH_PRODUCT_ID),
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.driver_info = KVASER_USB_HAS_TXRX_ERRORS },
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{ USB_DEVICE(KVASER_VENDOR_ID, USB_BLACKBIRD_SPRO_PRODUCT_ID),
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.driver_info = KVASER_USB_HAS_TXRX_ERRORS },
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{ USB_DEVICE(KVASER_VENDOR_ID, USB_OEM_MERCURY_PRODUCT_ID),
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.driver_info = KVASER_USB_HAS_TXRX_ERRORS },
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{ USB_DEVICE(KVASER_VENDOR_ID, USB_OEM_LEAF_PRODUCT_ID),
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.driver_info = KVASER_USB_HAS_TXRX_ERRORS },
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{ USB_DEVICE(KVASER_VENDOR_ID, USB_CAN_R_PRODUCT_ID),
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.driver_info = KVASER_USB_HAS_TXRX_ERRORS },
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{ USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_LITE_V2_PRODUCT_ID) },
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{ USB_DEVICE(KVASER_VENDOR_ID, USB_MINI_PCIE_HS_PRODUCT_ID) },
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{ USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_LIGHT_HS_V2_OEM_PRODUCT_ID) },
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{ USB_DEVICE(KVASER_VENDOR_ID, USB_USBCAN_LIGHT_2HS_PRODUCT_ID) },
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{ USB_DEVICE(KVASER_VENDOR_ID, USB_MINI_PCIE_2HS_PRODUCT_ID) },
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/* USBCANII USB product IDs */
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{ USB_DEVICE(KVASER_VENDOR_ID, USB_USBCAN2_PRODUCT_ID),
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.driver_info = KVASER_USB_HAS_TXRX_ERRORS },
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{ USB_DEVICE(KVASER_VENDOR_ID, USB_USBCAN_REVB_PRODUCT_ID),
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.driver_info = KVASER_USB_HAS_TXRX_ERRORS },
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{ USB_DEVICE(KVASER_VENDOR_ID, USB_MEMORATOR_PRODUCT_ID),
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.driver_info = KVASER_USB_HAS_TXRX_ERRORS },
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{ USB_DEVICE(KVASER_VENDOR_ID, USB_VCI2_PRODUCT_ID),
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.driver_info = KVASER_USB_HAS_TXRX_ERRORS },
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{ }
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};
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MODULE_DEVICE_TABLE(usb, kvaser_usb_table);
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int kvaser_usb_send_cmd(const struct kvaser_usb *dev, void *cmd, int len)
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{
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int actual_len; /* Not used */
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return usb_bulk_msg(dev->udev,
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usb_sndbulkpipe(dev->udev,
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dev->bulk_out->bEndpointAddress),
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cmd, len, &actual_len, KVASER_USB_TIMEOUT);
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}
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int kvaser_usb_recv_cmd(const struct kvaser_usb *dev, void *cmd, int len,
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int *actual_len)
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{
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return usb_bulk_msg(dev->udev,
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usb_rcvbulkpipe(dev->udev,
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dev->bulk_in->bEndpointAddress),
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cmd, len, actual_len, KVASER_USB_TIMEOUT);
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}
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static void kvaser_usb_send_cmd_callback(struct urb *urb)
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{
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struct net_device *netdev = urb->context;
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kfree(urb->transfer_buffer);
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if (urb->status)
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netdev_warn(netdev, "urb status received: %d\n", urb->status);
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}
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int kvaser_usb_send_cmd_async(struct kvaser_usb_net_priv *priv, void *cmd,
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int len)
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{
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struct kvaser_usb *dev = priv->dev;
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struct net_device *netdev = priv->netdev;
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struct urb *urb;
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||||
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;
|
||||
can_put_echo_skb(skb, netdev, context->echo_index);
|
||||
++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);
|
||||
|
||||
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);
|
||||
goto freeurb;
|
||||
}
|
||||
|
||||
context->priv = priv;
|
||||
|
||||
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->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;
|
||||
|
||||
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 {
|
||||
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;
|
||||
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 (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;
|
||||
}
|
||||
|
||||
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");
|
||||
File diff suppressed because it is too large
Load Diff
Loading…
Reference in New Issue