linux/drivers/char/hw_random/mxc-rnga.c

// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * RNG driver for Freescale RNGA
 *
 * Copyright 2008-2009 Freescale Semiconductor, Inc. All Rights Reserved.
 * Author: Alan Carvalho de Assis <[email protected]>
 */

/*
 *
 * This driver is based on other RNG drivers.
 */

#include <linux/clk.h>
#include <linux/delay.h>
#include <linux/hw_random.h>
#include <linux/io.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/platform_device.h>

/* RNGA Registers */
#define RNGA_CONTROL …
#define RNGA_STATUS …
#define RNGA_ENTROPY …
#define RNGA_OUTPUT_FIFO …
#define RNGA_MODE …
#define RNGA_VERIFICATION_CONTROL …
#define RNGA_OSC_CONTROL_COUNTER …
#define RNGA_OSC1_COUNTER …
#define RNGA_OSC2_COUNTER …
#define RNGA_OSC_COUNTER_STATUS …

/* RNGA Registers Range */
#define RNG_ADDR_RANGE …

/* RNGA Control Register */
#define RNGA_CONTROL_SLEEP …
#define RNGA_CONTROL_CLEAR_INT …
#define RNGA_CONTROL_MASK_INTS …
#define RNGA_CONTROL_HIGH_ASSURANCE …
#define RNGA_CONTROL_GO …

#define RNGA_STATUS_LEVEL_MASK …

/* RNGA Status Register */
#define RNGA_STATUS_OSC_DEAD …
#define RNGA_STATUS_SLEEP …
#define RNGA_STATUS_ERROR_INT …
#define RNGA_STATUS_FIFO_UNDERFLOW …
#define RNGA_STATUS_LAST_READ_STATUS …
#define RNGA_STATUS_SECURITY_VIOLATION …

struct mxc_rng { … };

static int mxc_rnga_data_present(struct hwrng *rng, int wait)
{ … }

static int mxc_rnga_data_read(struct hwrng *rng, u32 * data)
{ … }

static int mxc_rnga_init(struct hwrng *rng)
{ … }

static void mxc_rnga_cleanup(struct hwrng *rng)
{ … }

static int mxc_rnga_probe(struct platform_device *pdev)
{ … }

static void mxc_rnga_remove(struct platform_device *pdev)
{ … }

static const struct of_device_id mxc_rnga_of_match[] = …;
MODULE_DEVICE_TABLE(of, mxc_rnga_of_match);

static struct platform_driver mxc_rnga_driver = …;

module_platform_driver(…) …;

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