/* 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 , esd gmbh * Copyright (C) 2012 Olivier Sobrie * Copyright (C) 2015 Valeo S.A. */ #ifndef KVASER_USB_H #define KVASER_USB_H /* Kvaser USB CAN dongles are divided into three major platforms: * - Hydra: Running firmware labeled as 'mhydra' * - Leaf: Based on Renesas M32C or Freescale i.MX28, running firmware labeled * as 'filo' * - UsbcanII: Based on Renesas M16C, running firmware labeled as 'helios' */ #include #include #include #include #include #include #define KVASER_USB_MAX_RX_URBS 4 #define KVASER_USB_MAX_TX_URBS 128 #define KVASER_USB_TIMEOUT 1000 /* msecs */ #define KVASER_USB_RX_BUFFER_SIZE 3072 #define KVASER_USB_MAX_NET_DEVICES 5 /* USB devices features */ #define KVASER_USB_HAS_SILENT_MODE BIT(0) #define KVASER_USB_HAS_TXRX_ERRORS BIT(1) /* Device capabilities */ #define KVASER_USB_CAP_BERR_CAP 0x01 #define KVASER_USB_CAP_EXT_CAP 0x02 #define KVASER_USB_HYDRA_CAP_EXT_CMD 0x04 struct kvaser_usb_dev_cfg; enum kvaser_usb_leaf_family { KVASER_LEAF, KVASER_USBCAN, }; #define KVASER_USB_HYDRA_MAX_CMD_LEN 128 struct kvaser_usb_dev_card_data_hydra { u8 channel_to_he[KVASER_USB_MAX_NET_DEVICES]; u8 sysdbg_he; spinlock_t transid_lock; /* lock for transid */ u16 transid; /* lock for usb_rx_leftover and usb_rx_leftover_len */ spinlock_t usb_rx_leftover_lock; u8 usb_rx_leftover[KVASER_USB_HYDRA_MAX_CMD_LEN]; u8 usb_rx_leftover_len; }; struct kvaser_usb_dev_card_data { u32 ctrlmode_supported; u32 capabilities; union { struct { enum kvaser_usb_leaf_family family; } leaf; struct kvaser_usb_dev_card_data_hydra hydra; }; }; /* Context for an outstanding, not yet ACKed, transmission */ struct kvaser_usb_tx_urb_context { struct kvaser_usb_net_priv *priv; u32 echo_index; int dlc; }; struct kvaser_usb { struct usb_device *udev; struct usb_interface *intf; struct kvaser_usb_net_priv *nets[KVASER_USB_MAX_NET_DEVICES]; const struct kvaser_usb_dev_ops *ops; const struct kvaser_usb_dev_cfg *cfg; struct usb_endpoint_descriptor *bulk_in, *bulk_out; struct usb_anchor rx_submitted; /* @max_tx_urbs: Firmware-reported maximum number of outstanding, * not yet ACKed, transmissions on this device. This value is * also used as a sentinel for marking free tx contexts. */ u32 fw_version; unsigned int nchannels; unsigned int max_tx_urbs; struct kvaser_usb_dev_card_data card_data; bool rxinitdone; void *rxbuf[KVASER_USB_MAX_RX_URBS]; dma_addr_t rxbuf_dma[KVASER_USB_MAX_RX_URBS]; }; struct kvaser_usb_net_priv { struct can_priv can; struct can_berr_counter bec; struct kvaser_usb *dev; struct net_device *netdev; int channel; struct completion start_comp, stop_comp, flush_comp; struct usb_anchor tx_submitted; spinlock_t tx_contexts_lock; /* lock for active_tx_contexts */ int active_tx_contexts; struct kvaser_usb_tx_urb_context tx_contexts[]; }; /** * struct kvaser_usb_dev_ops - Device specific functions * @dev_set_mode: used for can.do_set_mode * @dev_set_bittiming: used for can.do_set_bittiming * @dev_set_data_bittiming: used for can.do_set_data_bittiming * @dev_get_berr_counter: used for can.do_get_berr_counter * * @dev_setup_endpoints: setup USB in and out endpoints * @dev_init_card: initialize card * @dev_get_software_info: get software info * @dev_get_software_details: get software details * @dev_get_card_info: get card info * @dev_get_capabilities: discover device capabilities * * @dev_set_opt_mode: set ctrlmod * @dev_start_chip: start the CAN controller * @dev_stop_chip: stop the CAN controller * @dev_reset_chip: reset the CAN controller * @dev_flush_queue: flush outstanding CAN messages * @dev_read_bulk_callback: handle incoming commands * @dev_frame_to_cmd: translate struct can_frame into device command */ struct kvaser_usb_dev_ops { int (*dev_set_mode)(struct net_device *netdev, enum can_mode mode); int (*dev_set_bittiming)(struct net_device *netdev); int (*dev_set_data_bittiming)(struct net_device *netdev); int (*dev_get_berr_counter)(const struct net_device *netdev, struct can_berr_counter *bec); int (*dev_setup_endpoints)(struct kvaser_usb *dev); int (*dev_init_card)(struct kvaser_usb *dev); int (*dev_get_software_info)(struct kvaser_usb *dev); int (*dev_get_software_details)(struct kvaser_usb *dev); int (*dev_get_card_info)(struct kvaser_usb *dev); int (*dev_get_capabilities)(struct kvaser_usb *dev); int (*dev_set_opt_mode)(const struct kvaser_usb_net_priv *priv); int (*dev_start_chip)(struct kvaser_usb_net_priv *priv); int (*dev_stop_chip)(struct kvaser_usb_net_priv *priv); int (*dev_reset_chip)(struct kvaser_usb *dev, int channel); int (*dev_flush_queue)(struct kvaser_usb_net_priv *priv); void (*dev_read_bulk_callback)(struct kvaser_usb *dev, void *buf, int len); void *(*dev_frame_to_cmd)(const struct kvaser_usb_net_priv *priv, const struct sk_buff *skb, int *frame_len, int *cmd_len, u16 transid); }; struct kvaser_usb_dev_cfg { const struct can_clock clock; const unsigned int timestamp_freq; const struct can_bittiming_const * const bittiming_const; const struct can_bittiming_const * const data_bittiming_const; }; extern const struct kvaser_usb_dev_ops kvaser_usb_hydra_dev_ops; extern const struct kvaser_usb_dev_ops kvaser_usb_leaf_dev_ops; int kvaser_usb_recv_cmd(const struct kvaser_usb *dev, void *cmd, int len, int *actual_len); int kvaser_usb_send_cmd(const struct kvaser_usb *dev, void *cmd, int len); int kvaser_usb_send_cmd_async(struct kvaser_usb_net_priv *priv, void *cmd, int len); int kvaser_usb_can_rx_over_error(struct net_device *netdev); #endif /* KVASER_USB_H */