// 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) * * Copyright (C) 2002-2018 KVASER AB, Sweden. All rights reserved. * Copyright (C) 2010 Matthias Fuchs <[email protected]>, esd gmbh * Copyright (C) 2012 Olivier Sobrie <[email protected]> * Copyright (C) 2015 Valeo S.A. */ #include <linux/completion.h> #include <linux/device.h> #include <linux/gfp.h> #include <linux/jiffies.h> #include <linux/kernel.h> #include <linux/netdevice.h> #include <linux/spinlock.h> #include <linux/string.h> #include <linux/types.h> #include <linux/units.h> #include <linux/usb.h> #include <linux/workqueue.h> #include <linux/can.h> #include <linux/can/dev.h> #include <linux/can/error.h> #include <linux/can/netlink.h> #include "kvaser_usb.h" #define MAX_USBCAN_NET_DEVICES … /* Command header size */ #define CMD_HEADER_LEN … /* Kvaser CAN message flags */ #define MSG_FLAG_ERROR_FRAME … #define MSG_FLAG_OVERRUN … #define MSG_FLAG_NERR … #define MSG_FLAG_WAKEUP … #define MSG_FLAG_REMOTE_FRAME … #define MSG_FLAG_RESERVED … #define MSG_FLAG_TX_ACK … #define MSG_FLAG_TX_REQUEST … /* CAN states (M16C CxSTRH register) */ #define M16C_STATE_BUS_RESET … #define M16C_STATE_BUS_ERROR … #define M16C_STATE_BUS_PASSIVE … #define M16C_STATE_BUS_OFF … /* Leaf/usbcan command ids */ #define CMD_RX_STD_MESSAGE … #define CMD_TX_STD_MESSAGE … #define CMD_RX_EXT_MESSAGE … #define CMD_TX_EXT_MESSAGE … #define CMD_SET_BUS_PARAMS … #define CMD_GET_BUS_PARAMS … #define CMD_GET_BUS_PARAMS_REPLY … #define CMD_GET_CHIP_STATE … #define CMD_CHIP_STATE_EVENT … #define CMD_SET_CTRL_MODE … #define CMD_RESET_CHIP … #define CMD_START_CHIP … #define CMD_START_CHIP_REPLY … #define CMD_STOP_CHIP … #define CMD_STOP_CHIP_REPLY … #define CMD_USBCAN_CLOCK_OVERFLOW_EVENT … #define CMD_GET_CARD_INFO … #define CMD_GET_CARD_INFO_REPLY … #define CMD_GET_SOFTWARE_INFO … #define CMD_GET_SOFTWARE_INFO_REPLY … #define CMD_ERROR_EVENT … #define CMD_FLUSH_QUEUE … #define CMD_TX_ACKNOWLEDGE … #define CMD_CAN_ERROR_EVENT … #define CMD_FLUSH_QUEUE_REPLY … #define CMD_GET_CAPABILITIES_REQ … #define CMD_GET_CAPABILITIES_RESP … #define CMD_LEAF_LOG_MESSAGE … /* Leaf frequency options */ #define KVASER_USB_LEAF_SWOPTION_FREQ_MASK … #define KVASER_USB_LEAF_SWOPTION_FREQ_16_MHZ_CLK … #define KVASER_USB_LEAF_SWOPTION_FREQ_32_MHZ_CLK … #define KVASER_USB_LEAF_SWOPTION_FREQ_24_MHZ_CLK … #define KVASER_USB_LEAF_SWOPTION_EXT_CAP … /* error factors */ #define M16C_EF_ACKE … #define M16C_EF_CRCE … #define M16C_EF_FORME … #define M16C_EF_STFE … #define M16C_EF_BITE0 … #define M16C_EF_BITE1 … #define M16C_EF_RCVE … #define M16C_EF_TRE … /* Only Leaf-based devices can report M16C error factors, * thus define our own error status flags for USBCANII */ #define USBCAN_ERROR_STATE_NONE … #define USBCAN_ERROR_STATE_TX_ERROR … #define USBCAN_ERROR_STATE_RX_ERROR … #define USBCAN_ERROR_STATE_BUSERROR … /* ctrl modes */ #define KVASER_CTRL_MODE_NORMAL … #define KVASER_CTRL_MODE_SILENT … #define KVASER_CTRL_MODE_SELFRECEPTION … #define KVASER_CTRL_MODE_OFF … /* Extended CAN identifier flag */ #define KVASER_EXTENDED_FRAME … struct kvaser_cmd_simple { … } __packed; struct kvaser_cmd_cardinfo { … } __packed; struct leaf_cmd_softinfo { … } __packed; struct usbcan_cmd_softinfo { … } __packed; struct kvaser_cmd_busparams { … } __packed; struct kvaser_cmd_tx_can { … } __packed; struct kvaser_cmd_rx_can_header { … } __packed; struct leaf_cmd_rx_can { … } __packed; struct usbcan_cmd_rx_can { … } __packed; struct leaf_cmd_chip_state_event { … } __packed; struct usbcan_cmd_chip_state_event { … } __packed; struct kvaser_cmd_tx_acknowledge_header { … } __packed; struct leaf_cmd_can_error_event { … } __packed; struct usbcan_cmd_can_error_event { … } __packed; /* CMD_ERROR_EVENT error codes */ #define KVASER_USB_LEAF_ERROR_EVENT_TX_QUEUE_FULL … #define KVASER_USB_LEAF_ERROR_EVENT_PARAM … struct leaf_cmd_error_event { … } __packed; struct usbcan_cmd_error_event { … } __packed; struct kvaser_cmd_ctrl_mode { … } __packed; struct kvaser_cmd_flush_queue { … } __packed; struct leaf_cmd_log_message { … } __packed; /* Sub commands for cap_req and cap_res */ #define KVASER_USB_LEAF_CAP_CMD_LISTEN_MODE … #define KVASER_USB_LEAF_CAP_CMD_ERR_REPORT … struct kvaser_cmd_cap_req { … } __packed; /* Status codes for cap_res */ #define KVASER_USB_LEAF_CAP_STAT_OK … #define KVASER_USB_LEAF_CAP_STAT_NOT_IMPL … #define KVASER_USB_LEAF_CAP_STAT_UNAVAIL … struct kvaser_cmd_cap_res { … } __packed; struct kvaser_cmd { … } __packed; #define CMD_SIZE_ANY … #define kvaser_fsize(field) … static const u8 kvaser_usb_leaf_cmd_sizes_leaf[] = …; static const u8 kvaser_usb_leaf_cmd_sizes_usbcan[] = …; /* Summary of a kvaser error event, for a unified Leaf/Usbcan error * handling. Some discrepancies between the two families exist: * * - USBCAN firmware does not report M16C "error factors" * - USBCAN controllers has difficulties reporting if the raised error * event is for ch0 or ch1. They leave such arbitration to the OS * driver by letting it compare error counters with previous values * and decide the error event's channel. Thus for USBCAN, the channel * field is only advisory. */ struct kvaser_usb_err_summary { … }; struct kvaser_usb_net_leaf_priv { … }; static const struct can_bittiming_const kvaser_usb_leaf_m16c_bittiming_const = …; static const struct can_bittiming_const kvaser_usb_leaf_m32c_bittiming_const = …; static const struct kvaser_usb_dev_cfg kvaser_usb_leaf_usbcan_dev_cfg = …; static const struct kvaser_usb_dev_cfg kvaser_usb_leaf_m32c_dev_cfg = …; static const struct kvaser_usb_dev_cfg kvaser_usb_leaf_imx_dev_cfg_16mhz = …; static const struct kvaser_usb_dev_cfg kvaser_usb_leaf_imx_dev_cfg_24mhz = …; static const struct kvaser_usb_dev_cfg kvaser_usb_leaf_imx_dev_cfg_32mhz = …; static int kvaser_usb_leaf_verify_size(const struct kvaser_usb *dev, const struct kvaser_cmd *cmd) { … } static void * kvaser_usb_leaf_frame_to_cmd(const struct kvaser_usb_net_priv *priv, const struct sk_buff *skb, int *cmd_len, u16 transid) { … } static int kvaser_usb_leaf_wait_cmd(const struct kvaser_usb *dev, u8 id, struct kvaser_cmd *cmd) { … } static int kvaser_usb_leaf_send_simple_cmd(const struct kvaser_usb *dev, u8 cmd_id, int channel) { … } static void kvaser_usb_leaf_get_software_info_leaf(struct kvaser_usb *dev, const struct leaf_cmd_softinfo *softinfo) { … } static int kvaser_usb_leaf_get_software_info_inner(struct kvaser_usb *dev) { … } static int kvaser_usb_leaf_get_software_info(struct kvaser_usb *dev) { … } static int kvaser_usb_leaf_get_card_info(struct kvaser_usb *dev) { … } static int kvaser_usb_leaf_get_single_capability(struct kvaser_usb *dev, u16 cap_cmd_req, u16 *status) { … } static int kvaser_usb_leaf_get_capabilities_leaf(struct kvaser_usb *dev) { … } static int kvaser_usb_leaf_get_capabilities(struct kvaser_usb *dev) { … } static void kvaser_usb_leaf_tx_acknowledge(const struct kvaser_usb *dev, const struct kvaser_cmd *cmd) { … } static int kvaser_usb_leaf_simple_cmd_async(struct kvaser_usb_net_priv *priv, u8 cmd_id) { … } static void kvaser_usb_leaf_chip_state_req_work(struct work_struct *work) { … } static void kvaser_usb_leaf_rx_error_update_can_state(struct kvaser_usb_net_priv *priv, const struct kvaser_usb_err_summary *es, struct can_frame *cf) { … } static void kvaser_usb_leaf_rx_error(const struct kvaser_usb *dev, const struct kvaser_usb_err_summary *es) { … } /* For USBCAN, report error to userspace if the channels's errors counter * has changed, or we're the only channel seeing a bus error state. */ static void kvaser_usb_leaf_usbcan_conditionally_rx_error(const struct kvaser_usb *dev, struct kvaser_usb_err_summary *es) { … } static void kvaser_usb_leaf_usbcan_rx_error(const struct kvaser_usb *dev, const struct kvaser_cmd *cmd) { … } static void kvaser_usb_leaf_leaf_rx_error(const struct kvaser_usb *dev, const struct kvaser_cmd *cmd) { … } static void kvaser_usb_leaf_rx_can_err(const struct kvaser_usb_net_priv *priv, const struct kvaser_cmd *cmd) { … } static void kvaser_usb_leaf_rx_can_msg(const struct kvaser_usb *dev, const struct kvaser_cmd *cmd) { … } static void kvaser_usb_leaf_error_event_parameter(const struct kvaser_usb *dev, const struct kvaser_cmd *cmd) { … } static void kvaser_usb_leaf_error_event(const struct kvaser_usb *dev, const struct kvaser_cmd *cmd) { … } static void kvaser_usb_leaf_start_chip_reply(const struct kvaser_usb *dev, const struct kvaser_cmd *cmd) { … } static void kvaser_usb_leaf_stop_chip_reply(const struct kvaser_usb *dev, const struct kvaser_cmd *cmd) { … } static void kvaser_usb_leaf_get_busparams_reply(const struct kvaser_usb *dev, const struct kvaser_cmd *cmd) { … } static void kvaser_usb_leaf_handle_command(const struct kvaser_usb *dev, const struct kvaser_cmd *cmd) { … } static void kvaser_usb_leaf_read_bulk_callback(struct kvaser_usb *dev, void *buf, int len) { … } static int kvaser_usb_leaf_set_opt_mode(const struct kvaser_usb_net_priv *priv) { … } static int kvaser_usb_leaf_start_chip(struct kvaser_usb_net_priv *priv) { … } static int kvaser_usb_leaf_stop_chip(struct kvaser_usb_net_priv *priv) { … } static int kvaser_usb_leaf_reset_chip(struct kvaser_usb *dev, int channel) { … } static int kvaser_usb_leaf_flush_queue(struct kvaser_usb_net_priv *priv) { … } static int kvaser_usb_leaf_init_card(struct kvaser_usb *dev) { … } static int kvaser_usb_leaf_init_channel(struct kvaser_usb_net_priv *priv) { … } static void kvaser_usb_leaf_remove_channel(struct kvaser_usb_net_priv *priv) { … } static int kvaser_usb_leaf_set_bittiming(const struct net_device *netdev, const struct kvaser_usb_busparams *busparams) { … } static int kvaser_usb_leaf_get_busparams(struct kvaser_usb_net_priv *priv) { … } static int kvaser_usb_leaf_set_mode(struct net_device *netdev, enum can_mode mode) { … } static int kvaser_usb_leaf_get_berr_counter(const struct net_device *netdev, struct can_berr_counter *bec) { … } static int kvaser_usb_leaf_setup_endpoints(struct kvaser_usb *dev) { … } const struct kvaser_usb_dev_ops kvaser_usb_leaf_dev_ops = …;
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