linux/drivers/staging/media/omap4iss/iss_csiphy.c

// SPDX-License-Identifier: GPL-2.0+
/*
 * TI OMAP4 ISS V4L2 Driver - CSI PHY module
 *
 * Copyright (C) 2012 Texas Instruments, Inc.
 *
 * Author: Sergio Aguirre <[email protected]>
 */

#include <linux/delay.h>
#include <linux/device.h>
#include <linux/regmap.h>

#include "../../../../arch/arm/mach-omap2/control.h"

#include "iss.h"
#include "iss_regs.h"
#include "iss_csiphy.h"

/*
 * csiphy_lanes_config - Configuration of CSIPHY lanes.
 *
 * Updates HW configuration.
 * Called with phy->mutex taken.
 */
static void csiphy_lanes_config(struct iss_csiphy *phy)
{ … }

/*
 * csiphy_set_power
 * @power: Power state to be set.
 *
 * Returns 0 if successful, or -EBUSY if the retry count is exceeded.
 */
static int csiphy_set_power(struct iss_csiphy *phy, u32 power)
{ … }

/*
 * csiphy_dphy_config - Configure CSI2 D-PHY parameters.
 *
 * Called with phy->mutex taken.
 */
static void csiphy_dphy_config(struct iss_csiphy *phy)
{ … }

/*
 * TCLK values are OK at their reset values
 */
#define TCLK_TERM …
#define TCLK_MISS …
#define TCLK_SETTLE …

int omap4iss_csiphy_config(struct iss_device *iss,
			   struct v4l2_subdev *csi2_subdev)
{ … }

int omap4iss_csiphy_acquire(struct iss_csiphy *phy)
{ … }

void omap4iss_csiphy_release(struct iss_csiphy *phy)
{ … }

/*
 * omap4iss_csiphy_init - Initialize the CSI PHY frontends
 */
int omap4iss_csiphy_init(struct iss_device *iss)
{ … }