/* SPDX-License-Identifier: GPL-2.0-only */

/*
 * Copyright (c) 2008 MtekVision Co., Ltd.
 *      Kwangwoo Lee <kwlee@mtekvision.com>
 *
 * Using code from:
 *  - ads7846.c
 *      Copyright (c) 2005 David Brownell
 *      Copyright (c) 2006 Nokia Corporation
 *  - corgi_ts.c
 *      Copyright (C) 2004-2005 Richard Purdie
 *  - omap_ts.[hc], ads7846.h, ts_osk.c
 *      Copyright (C) 2002 MontaVista Software
 *      Copyright (C) 2004 Texas Instruments
 *      Copyright (C) 2005 Dirk Behme
 */

#ifndef _TSC2007_H
#define _TSC2007_H

#include <linux/input/touchscreen.h>
struct gpio_desc;

#define TSC2007_MEASURE_TEMP0           (0x0 << 4)
#define TSC2007_MEASURE_AUX             (0x2 << 4)
#define TSC2007_MEASURE_TEMP1           (0x4 << 4)
#define TSC2007_ACTIVATE_XN             (0x8 << 4)
#define TSC2007_ACTIVATE_YN             (0x9 << 4)
#define TSC2007_ACTIVATE_YP_XN          (0xa << 4)
#define TSC2007_SETUP                   (0xb << 4)
#define TSC2007_MEASURE_X               (0xc << 4)
#define TSC2007_MEASURE_Y               (0xd << 4)
#define TSC2007_MEASURE_Z1              (0xe << 4)
#define TSC2007_MEASURE_Z2              (0xf << 4)

#define TSC2007_POWER_OFF_IRQ_EN        (0x0 << 2)
#define TSC2007_ADC_ON_IRQ_DIS0         (0x1 << 2)
#define TSC2007_ADC_OFF_IRQ_EN          (0x2 << 2)
#define TSC2007_ADC_ON_IRQ_DIS1         (0x3 << 2)

#define TSC2007_12BIT                   (0x0 << 1)
#define TSC2007_8BIT                    (0x1 << 1)

#define MAX_12BIT                       ((1 << 12) - 1)

#define ADC_ON_12BIT    (TSC2007_12BIT | TSC2007_ADC_ON_IRQ_DIS0)

#define READ_Y          (ADC_ON_12BIT | TSC2007_MEASURE_Y)
#define READ_Z1         (ADC_ON_12BIT | TSC2007_MEASURE_Z1)
#define READ_Z2         (ADC_ON_12BIT | TSC2007_MEASURE_Z2)
#define READ_X          (ADC_ON_12BIT | TSC2007_MEASURE_X)
#define PWRDOWN         (TSC2007_12BIT | TSC2007_POWER_OFF_IRQ_EN)

struct ts_event {
        u16     x;
        u16     y;
        u16     z1, z2;
};

struct tsc2007 {
        struct input_dev        *input;
        char                    phys[32];

        struct i2c_client       *client;

        struct touchscreen_properties prop;
        u16                     model;
        u16                     x_plate_ohms;
        u16                     max_rt;
        unsigned long           poll_period; /* in jiffies */
        int                     fuzzx;
        int                     fuzzy;
        int                     fuzzz;

        struct gpio_desc        *gpiod;
        int                     irq;

        wait_queue_head_t       wait;
        bool                    stopped;

        int                     (*get_pendown_state)(struct device *);
        void                    (*clear_penirq)(void);

        struct mutex            mlock;
};

int tsc2007_xfer(struct tsc2007 *tsc, u8 cmd);
u32 tsc2007_calculate_resistance(struct tsc2007 *tsc, struct ts_event *tc);
bool tsc2007_is_pen_down(struct tsc2007 *ts);

#if IS_ENABLED(CONFIG_TOUCHSCREEN_TSC2007_IIO)
/* defined in tsc2007_iio.c */
int tsc2007_iio_configure(struct tsc2007 *ts);
#else
static inline int tsc2007_iio_configure(struct tsc2007 *ts)
{
        return 0;
}
#endif /* CONFIG_TOUCHSCREEN_TSC2007_IIO */

#endif /* _TSC2007_H */