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/* SPDX-License-Identifier: GPL-2.0 */
/* CAN bus driver for Bosch M_CAN controller
* Copyright (C) 2018 Texas Instruments Incorporated - http://www.ti.com/
*/
#ifndef _CAN_M_CAN_H_
#define _CAN_M_CAN_H_
#include <linux/can/core.h>
#include <linux/can/dev.h>
#include <linux/can/rx-offload.h>
#include <linux/clk.h>
#include <linux/completion.h>
#include <linux/delay.h>
#include <linux/device.h>
#include <linux/dma-mapping.h>
#include <linux/freezer.h>
#include <linux/hrtimer.h>
#include <linux/interrupt.h>
#include <linux/io.h>
#include <linux/iopoll.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/netdevice.h>
#include <linux/of.h>
#include <linux/phy/phy.h>
#include <linux/pinctrl/consumer.h>
#include <linux/pm_runtime.h>
#include <linux/slab.h>
#include <linux/uaccess.h>
/* m_can lec values */
enum m_can_lec_type {
LEC_NO_ERROR = 0,
LEC_STUFF_ERROR,
LEC_FORM_ERROR,
LEC_ACK_ERROR,
LEC_BIT1_ERROR,
LEC_BIT0_ERROR,
LEC_CRC_ERROR,
LEC_NO_CHANGE,
};
enum m_can_mram_cfg {
MRAM_SIDF = 0,
MRAM_XIDF,
MRAM_RXF0,
MRAM_RXF1,
MRAM_RXB,
MRAM_TXE,
MRAM_TXB,
MRAM_CFG_NUM,
};
/* address offset and element number for each FIFO/Buffer in the Message RAM */
struct mram_cfg {
u16 off;
u8 num;
};
struct m_can_classdev;
struct m_can_ops {
/* Device specific call backs */
int (*clear_interrupts)(struct m_can_classdev *cdev);
u32 (*read_reg)(struct m_can_classdev *cdev, int reg);
int (*write_reg)(struct m_can_classdev *cdev, int reg, int val);
int (*read_fifo)(struct m_can_classdev *cdev, int addr_offset, void *val, size_t val_count);
int (*write_fifo)(struct m_can_classdev *cdev, int addr_offset,
const void *val, size_t val_count);
int (*init)(struct m_can_classdev *cdev);
};
struct m_can_tx_op {
struct m_can_classdev *cdev;
struct work_struct work;
struct sk_buff *skb;
bool submit;
};
struct m_can_classdev {
struct can_priv can;
struct can_rx_offload offload;
struct napi_struct napi;
struct net_device *net;
struct device *dev;
struct clk *hclk;
struct clk *cclk;
struct workqueue_struct *tx_wq;
struct phy *transceiver;
ktime_t irq_timer_wait;
struct m_can_ops *ops;
int version;
u32 irqstatus;
int pm_clock_support;
int pm_wake_source;
int is_peripheral;
// Cached M_CAN_IE register content
u32 active_interrupts;
u32 rx_max_coalesced_frames_irq;
u32 rx_coalesce_usecs_irq;
u32 tx_max_coalesced_frames;
u32 tx_max_coalesced_frames_irq;
u32 tx_coalesce_usecs_irq;
// Store this internally to avoid fetch delays on peripheral chips
u32 tx_fifo_putidx;
/* Protects shared state between start_xmit and m_can_isr */
spinlock_t tx_handling_spinlock;
int tx_fifo_in_flight;
struct m_can_tx_op *tx_ops;
int tx_fifo_size;
int next_tx_op;
int nr_txs_without_submit;
/* bitfield of fifo elements that will be submitted together */
u32 tx_peripheral_submit;
struct mram_cfg mcfg[MRAM_CFG_NUM];
struct hrtimer hrtimer;
};
struct m_can_classdev *m_can_class_allocate_dev(struct device *dev, int sizeof_priv);
void m_can_class_free_dev(struct net_device *net);
int m_can_class_register(struct m_can_classdev *cdev);
void m_can_class_unregister(struct m_can_classdev *cdev);
int m_can_class_get_clocks(struct m_can_classdev *cdev);
int m_can_init_ram(struct m_can_classdev *priv);
int m_can_check_mram_cfg(struct m_can_classdev *cdev, u32 mram_max_size);
int m_can_class_suspend(struct device *dev);
int m_can_class_resume(struct device *dev);
#endif /* _CAN_M_H_ */
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