linux/drivers/i2c/busses/i2c-ljca.c

// SPDX-License-Identifier: GPL-2.0-only
/*
 * Intel La Jolla Cove Adapter USB-I2C driver
 *
 * Copyright (c) 2023, Intel Corporation.
 */

#include <linux/acpi.h>
#include <linux/auxiliary_bus.h>
#include <linux/bitfield.h>
#include <linux/bits.h>
#include <linux/dev_printk.h>
#include <linux/i2c.h>
#include <linux/module.h>
#include <linux/usb/ljca.h>

/* I2C init flags */
#define LJCA_I2C_INIT_FLAG_MODE …
#define LJCA_I2C_INIT_FLAG_MODE_POLLING …
#define LJCA_I2C_INIT_FLAG_MODE_INTERRUPT …

#define LJCA_I2C_INIT_FLAG_ADDR_16BIT …

#define LJCA_I2C_INIT_FLAG_FREQ …
#define LJCA_I2C_INIT_FLAG_FREQ_100K …
#define LJCA_I2C_INIT_FLAG_FREQ_400K …
#define LJCA_I2C_INIT_FLAG_FREQ_1M …

#define LJCA_I2C_BUF_SIZE …
#define LJCA_I2C_MAX_XFER_SIZE …

/* I2C commands */
enum ljca_i2c_cmd { … };

enum ljca_xfer_type { … };

/* I2C raw commands: Init/Start/Read/Write/Stop */
struct ljca_i2c_rw_packet { … } __packed;

struct ljca_i2c_dev { … };

static int ljca_i2c_init(struct ljca_i2c_dev *ljca_i2c, u8 id)
{ … }

static int ljca_i2c_start(struct ljca_i2c_dev *ljca_i2c, u8 target_addr,
			  enum ljca_xfer_type type)
{ … }

static void ljca_i2c_stop(struct ljca_i2c_dev *ljca_i2c, u8 target_addr)
{ … }

static int ljca_i2c_pure_read(struct ljca_i2c_dev *ljca_i2c, u8 *data, u8 len)
{ … }

static int ljca_i2c_read(struct ljca_i2c_dev *ljca_i2c, u8 target_addr, u8 *data,
			 u8 len)
{ … }

static int ljca_i2c_pure_write(struct ljca_i2c_dev *ljca_i2c, u8 *data, u8 len)
{ … }

static int ljca_i2c_write(struct ljca_i2c_dev *ljca_i2c, u8 target_addr,
			  u8 *data, u8 len)
{ … }

static int ljca_i2c_xfer(struct i2c_adapter *adapter, struct i2c_msg *msg,
			 int num)
{ … }

static u32 ljca_i2c_func(struct i2c_adapter *adap)
{ … }

static const struct i2c_adapter_quirks ljca_i2c_quirks = …;

static const struct i2c_algorithm ljca_i2c_algo = …;

static int ljca_i2c_probe(struct auxiliary_device *auxdev,
			  const struct auxiliary_device_id *aux_dev_id)
{ … }

static void ljca_i2c_remove(struct auxiliary_device *auxdev)
{ … }

static const struct auxiliary_device_id ljca_i2c_id_table[] = …;
MODULE_DEVICE_TABLE(auxiliary, ljca_i2c_id_table);

static struct auxiliary_driver ljca_i2c_driver = …;
module_auxiliary_driver(…) …;

MODULE_AUTHOR(…) …;
MODULE_AUTHOR(…) …;
MODULE_AUTHOR(…) …;
MODULE_DESCRIPTION(…) …;
MODULE_LICENSE(…) …;
MODULE_IMPORT_NS(…);