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/* SPDX-License-Identifier: GPL-2.0 */
/*
* linux/can/dev.h
*
* Definitions for the CAN network device driver interface
*
* Copyright (C) 2006 Andrey Volkov <[email protected]>
* Varma Electronics Oy
*
* Copyright (C) 2008 Wolfgang Grandegger <[email protected]>
*
*/
#ifndef _CAN_DEV_H
#define _CAN_DEV_H
#include <linux/can.h>
#include <linux/can/bittiming.h>
#include <linux/can/error.h>
#include <linux/can/led.h>
#include <linux/can/length.h>
#include <linux/can/netlink.h>
#include <linux/can/skb.h>
#include <linux/netdevice.h>
/*
* CAN mode
*/
enum can_mode {
CAN_MODE_STOP = 0,
CAN_MODE_START,
CAN_MODE_SLEEP
};
enum can_termination_gpio {
CAN_TERMINATION_GPIO_DISABLED = 0,
CAN_TERMINATION_GPIO_ENABLED,
CAN_TERMINATION_GPIO_MAX,
};
/*
* CAN common private data
*/
struct can_priv {
struct net_device *dev;
struct can_device_stats can_stats;
const struct can_bittiming_const *bittiming_const,
*data_bittiming_const;
struct can_bittiming bittiming, data_bittiming;
const struct can_tdc_const *tdc_const;
struct can_tdc tdc;
unsigned int bitrate_const_cnt;
const u32 *bitrate_const;
const u32 *data_bitrate_const;
unsigned int data_bitrate_const_cnt;
u32 bitrate_max;
struct can_clock clock;
unsigned int termination_const_cnt;
const u16 *termination_const;
u16 termination;
struct gpio_desc *termination_gpio;
u16 termination_gpio_ohms[CAN_TERMINATION_GPIO_MAX];
enum can_state state;
/* CAN controller features - see include/uapi/linux/can/netlink.h */
u32 ctrlmode; /* current options setting */
u32 ctrlmode_supported; /* options that can be modified by netlink */
u32 ctrlmode_static; /* static enabled options for driver/hardware */
int restart_ms;
struct delayed_work restart_work;
int (*do_set_bittiming)(struct net_device *dev);
int (*do_set_data_bittiming)(struct net_device *dev);
int (*do_set_mode)(struct net_device *dev, enum can_mode mode);
int (*do_set_termination)(struct net_device *dev, u16 term);
int (*do_get_state)(const struct net_device *dev,
enum can_state *state);
int (*do_get_berr_counter)(const struct net_device *dev,
struct can_berr_counter *bec);
unsigned int echo_skb_max;
struct sk_buff **echo_skb;
#ifdef CONFIG_CAN_LEDS
struct led_trigger *tx_led_trig;
char tx_led_trig_name[CAN_LED_NAME_SZ];
struct led_trigger *rx_led_trig;
char rx_led_trig_name[CAN_LED_NAME_SZ];
struct led_trigger *rxtx_led_trig;
char rxtx_led_trig_name[CAN_LED_NAME_SZ];
#endif
};
/* helper to define static CAN controller features at device creation time */
static inline void can_set_static_ctrlmode(struct net_device *dev,
u32 static_mode)
{
struct can_priv *priv = netdev_priv(dev);
/* alloc_candev() succeeded => netdev_priv() is valid at this point */
priv->ctrlmode = static_mode;
priv->ctrlmode_static = static_mode;
/* override MTU which was set by default in can_setup()? */
if (static_mode & CAN_CTRLMODE_FD)
dev->mtu = CANFD_MTU;
}
void can_setup(struct net_device *dev);
struct net_device *alloc_candev_mqs(int sizeof_priv, unsigned int echo_skb_max,
unsigned int txqs, unsigned int rxqs);
#define alloc_candev(sizeof_priv, echo_skb_max) \
alloc_candev_mqs(sizeof_priv, echo_skb_max, 1, 1)
#define alloc_candev_mq(sizeof_priv, echo_skb_max, count) \
alloc_candev_mqs(sizeof_priv, echo_skb_max, count, count)
void free_candev(struct net_device *dev);
/* a candev safe wrapper around netdev_priv */
struct can_priv *safe_candev_priv(struct net_device *dev);
int open_candev(struct net_device *dev);
void close_candev(struct net_device *dev);
int can_change_mtu(struct net_device *dev, int new_mtu);
int register_candev(struct net_device *dev);
void unregister_candev(struct net_device *dev);
int can_restart_now(struct net_device *dev);
void can_bus_off(struct net_device *dev);
const char *can_get_state_str(const enum can_state state);
void can_change_state(struct net_device *dev, struct can_frame *cf,
enum can_state tx_state, enum can_state rx_state);
#ifdef CONFIG_OF
void of_can_transceiver(struct net_device *dev);
#else
static inline void of_can_transceiver(struct net_device *dev) { }
#endif
extern struct rtnl_link_ops can_link_ops;
int can_netlink_register(void);
void can_netlink_unregister(void);
#endif /* !_CAN_DEV_H */
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