drivers/fingerprint/et7xx-spi_platform.c

/*
 * Copyright (C) 2016 Samsung Electronics. All rights reserved.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * version 2 as published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * General Public License for more details.
 */

#include "fingerprint.h"
#include "et7xx.h"

#ifdef ENABLE_SENSORS_FPRINT_SECURE
#if defined(CONFIG_SECURE_OS_BOOSTER_API)
#include <mach/secos_booster.h>
#elif defined(CONFIG_TZDEV_BOOST)
#if defined(CONFIG_TEEGRIS_VERSION) && (CONFIG_TEEGRIS_VERSION >= 4)
#include <../drivers/misc/tzdev/extensions/boost.h>
#else
#include <../drivers/misc/tzdev/tz_boost.h>
#endif
#endif
#endif

int fps_resume_set(void) {
	return 0;
}

int fps_suspend_set(struct et7xx_data *etspi) {
	return 0;
}

int et7xx_register_platform_variable(struct et7xx_data *etspi)
{
	int retval = 0;

	pr_info("Entry\n");
#ifdef ENABLE_SENSORS_FPRINT_SECURE
	etspi->fp_spi_pclk = devm_clk_get(etspi->dev, "gate_spi_clk");
	if (IS_ERR(etspi->fp_spi_pclk)) {
		pr_err("Can't get gate_spi_clk\n");
		return PTR_ERR(etspi->fp_spi_pclk);
	}

	etspi->fp_spi_sclk = devm_clk_get(etspi->dev, "ipclk_spi");
	if (IS_ERR(etspi->fp_spi_sclk)) {
		pr_err("Can't get ipclk_spi\n");
		return PTR_ERR(etspi->fp_spi_sclk);
	}
#endif
	return retval;
}

int et7xx_unregister_platform_variable(struct et7xx_data *etspi)
{
	int retval = 0;

	pr_info("Entry\n");
#ifdef ENABLE_SENSORS_FPRINT_SECURE
	clk_put(etspi->fp_spi_pclk);
	clk_put(etspi->fp_spi_sclk);
#endif

	return retval;
}


#ifdef ENABLE_SENSORS_FPRINT_SECURE
static int et7xx_sec_spi_prepare(struct et7xx_data *etspi)
{
	u32 clk_speed = etspi->spi_speed;
	int retval = 0;

	clk_prepare_enable(etspi->fp_spi_pclk);
	clk_prepare_enable(etspi->fp_spi_sclk);

	if (clk_get_rate(etspi->fp_spi_sclk) != (clk_speed * 4)) {
		retval = clk_set_rate(etspi->fp_spi_sclk, clk_speed * 4);
		if (retval < 0)
			pr_err("SPI clk set failed: %d\n", retval);
		else
			pr_debug("Set SPI clock rate: %u(%lu)\n",
				clk_speed, clk_get_rate(etspi->fp_spi_sclk) / 4);
	} else {
		pr_debug("Set SPI clock rate: %u(%lu)\n",
				clk_speed, clk_get_rate(etspi->fp_spi_sclk) / 4);
	}

	return retval;
}

static int et7xx_sec_spi_unprepare(struct et7xx_data *etspi)
{
	clk_disable_unprepare(etspi->fp_spi_pclk);
	clk_disable_unprepare(etspi->fp_spi_sclk);

	return 0;
}
#endif

int et7xx_spi_clk_enable(struct et7xx_data *etspi)
{
	int retval = 0;
#ifdef ENABLE_SENSORS_FPRINT_SECURE
	if (!etspi->enabled_clk) {
		retval = et7xx_sec_spi_prepare(etspi);
		if (retval < 0)
			pr_err("Unable to enable spi clk\n");
		else
			pr_debug("ENABLE_SPI_CLOCK %ld\n", etspi->spi_speed);
		wake_lock(&etspi->fp_spi_lock);
		etspi->enabled_clk = true;
	}
#endif
	return retval;
}

int et7xx_spi_clk_disable(struct et7xx_data *etspi)
{
	int retval = 0;
#ifdef ENABLE_SENSORS_FPRINT_SECURE
	if (etspi->enabled_clk) {
		retval = et7xx_sec_spi_unprepare(etspi);
		if (retval < 0)
			pr_err("couldn't disable spi clks\n");
		wake_unlock(&etspi->fp_spi_lock);
		etspi->enabled_clk = false;
		pr_debug("clk disalbed\n");
	}
#endif
	return retval;
}

int et7xx_set_cpu_speedup(struct et7xx_data *etspi, int onoff)
{
	int retval = 0;
#ifdef ENABLE_SENSORS_FPRINT_SECURE
#ifdef CONFIG_SECURE_OS_BOOSTER_API
	int retry_cnt = 0;
#endif

#if defined(CONFIG_TZDEV_BOOST)
	if (onoff) {
		pr_info("SPEEDUP ON:%d\n", onoff);
		tz_boost_enable();
	} else {
		pr_info("SPEEDUP OFF:%d\n", onoff);
		tz_boost_disable();
	}
#elif defined(CONFIG_SECURE_OS_BOOSTER_API)
	if (onoff) {
		do {
			retval = secos_booster_start(onoff - 1);
			retry_cnt++;
			if (retval) {
				pr_err("booster start failed. (%d) retry: %d\n",
					retval, retry_cnt);
				if (retry_cnt < 7)
					usleep_range(500, 510);
			}
		} while (retval && retry_cnt < 7);
	} else {
		retval = secos_booster_stop();
		if (retval)
			pr_err("booster stop failed. (%d)\n", retval);
	}
#else
		pr_err("CPU_SPEEDUP is not used\n");
#endif
#endif /* ENABLE_SENSORS_FPRINT_SECURE */
	return retval;
}