linux/drivers/media/pci/netup_unidvb/netup_unidvb_i2c.c

// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * netup_unidvb_i2c.c
 *
 * Internal I2C bus driver for NetUP Universal Dual DVB-CI
 *
 * Copyright (C) 2014 NetUP Inc.
 * Copyright (C) 2014 Sergey Kozlov <[email protected]>
 * Copyright (C) 2014 Abylay Ospan <[email protected]>
 */

#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/init.h>
#include <linux/delay.h>
#include "netup_unidvb.h"

#define NETUP_I2C_BUS0_ADDR …
#define NETUP_I2C_BUS1_ADDR …
#define NETUP_I2C_TIMEOUT …

/* twi_ctrl0_stat reg bits */
#define TWI_IRQEN_COMPL …
#define TWI_IRQEN_ANACK …
#define TWI_IRQEN_DNACK …
#define TWI_IRQ_COMPL …
#define TWI_IRQ_ANACK …
#define TWI_IRQ_DNACK …
#define TWI_IRQ_TX …
#define TWI_IRQ_RX …
#define TWI_IRQEN …
/* twi_addr_ctrl1 reg bits*/
#define TWI_TRANSFER …
#define TWI_NOSTOP …
#define TWI_SOFT_RESET …
/* twi_clkdiv reg value */
#define TWI_CLKDIV …
/* fifo_stat_ctrl reg bits */
#define FIFO_IRQEN …
#define FIFO_RESET …
/* FIFO size */
#define FIFO_SIZE …

struct netup_i2c_fifo_regs { … } __packed __aligned(…);

struct netup_i2c_regs { … } __packed __aligned(…);

irqreturn_t netup_i2c_interrupt(struct netup_i2c *i2c)
{ … }

static void netup_i2c_reset(struct netup_i2c *i2c)
{ … }

static void netup_i2c_fifo_tx(struct netup_i2c *i2c)
{ … }

static void netup_i2c_fifo_rx(struct netup_i2c *i2c)
{ … }

static void netup_i2c_start_xfer(struct netup_i2c *i2c)
{ … }

static int netup_i2c_xfer(struct i2c_adapter *adap,
			  struct i2c_msg *msgs, int num)
{ … }

static u32 netup_i2c_func(struct i2c_adapter *adap)
{ … }

static const struct i2c_algorithm netup_i2c_algorithm = …;

static const struct i2c_adapter netup_i2c_adapter = …;

static int netup_i2c_init(struct netup_unidvb_dev *ndev, int bus_num)
{ … }

static void netup_i2c_remove(struct netup_unidvb_dev *ndev, int bus_num)
{ … }

int netup_i2c_register(struct netup_unidvb_dev *ndev)
{ … }

void netup_i2c_unregister(struct netup_unidvb_dev *ndev)
{ … }