LXR linux/drivers/input/touchscreen/tsc2007.h

   1/* SPDX-License-Identifier: GPL-2.0-only */
   2
   3/*
   4 * Copyright (c) 2008 MtekVision Co., Ltd.
   5 *      Kwangwoo Lee <kwlee@mtekvision.com>
   6 *
   7 * Using code from:
   8 *  - ads7846.c
   9 *      Copyright (c) 2005 David Brownell
  10 *      Copyright (c) 2006 Nokia Corporation
  11 *  - corgi_ts.c
  12 *      Copyright (C) 2004-2005 Richard Purdie
  13 *  - omap_ts.[hc], ads7846.h, ts_osk.c
  14 *      Copyright (C) 2002 MontaVista Software
  15 *      Copyright (C) 2004 Texas Instruments
  16 *      Copyright (C) 2005 Dirk Behme
  17 */
  18
  19#ifndef _TSC2007_H
  20#define _TSC2007_H
  21
  22struct gpio_desc;
  23
  24#define TSC2007_MEASURE_TEMP0           (0x0 << 4)
  25#define TSC2007_MEASURE_AUX             (0x2 << 4)
  26#define TSC2007_MEASURE_TEMP1           (0x4 << 4)
  27#define TSC2007_ACTIVATE_XN             (0x8 << 4)
  28#define TSC2007_ACTIVATE_YN             (0x9 << 4)
  29#define TSC2007_ACTIVATE_YP_XN          (0xa << 4)
  30#define TSC2007_SETUP                   (0xb << 4)
  31#define TSC2007_MEASURE_X               (0xc << 4)
  32#define TSC2007_MEASURE_Y               (0xd << 4)
  33#define TSC2007_MEASURE_Z1              (0xe << 4)
  34#define TSC2007_MEASURE_Z2              (0xf << 4)
  35
  36#define TSC2007_POWER_OFF_IRQ_EN        (0x0 << 2)
  37#define TSC2007_ADC_ON_IRQ_DIS0         (0x1 << 2)
  38#define TSC2007_ADC_OFF_IRQ_EN          (0x2 << 2)
  39#define TSC2007_ADC_ON_IRQ_DIS1         (0x3 << 2)
  40
  41#define TSC2007_12BIT                   (0x0 << 1)
  42#define TSC2007_8BIT                    (0x1 << 1)
  43
  44#define MAX_12BIT                       ((1 << 12) - 1)
  45
  46#define ADC_ON_12BIT    (TSC2007_12BIT | TSC2007_ADC_ON_IRQ_DIS0)
  47
  48#define READ_Y          (ADC_ON_12BIT | TSC2007_MEASURE_Y)
  49#define READ_Z1         (ADC_ON_12BIT | TSC2007_MEASURE_Z1)
  50#define READ_Z2         (ADC_ON_12BIT | TSC2007_MEASURE_Z2)
  51#define READ_X          (ADC_ON_12BIT | TSC2007_MEASURE_X)
  52#define PWRDOWN         (TSC2007_12BIT | TSC2007_POWER_OFF_IRQ_EN)
  53
  54struct ts_event {
  55        u16     x;
  56        u16     y;
  57        u16     z1, z2;
  58};
  59
  60struct tsc2007 {
  61        struct input_dev        *input;
  62        char                    phys[32];
  63
  64        struct i2c_client       *client;
  65
  66        u16                     model;
  67        u16                     x_plate_ohms;
  68        u16                     max_rt;
  69        unsigned long           poll_period; /* in jiffies */
  70        int                     fuzzx;
  71        int                     fuzzy;
  72        int                     fuzzz;
  73
  74        struct gpio_desc        *gpiod;
  75        int                     irq;
  76
  77        wait_queue_head_t       wait;
  78        bool                    stopped;
  79
  80        int                     (*get_pendown_state)(struct device *);
  81        void                    (*clear_penirq)(void);
  82
  83        struct mutex            mlock;
  84};
  85
  86int tsc2007_xfer(struct tsc2007 *tsc, u8 cmd);
  87u32 tsc2007_calculate_resistance(struct tsc2007 *tsc, struct ts_event *tc);
  88bool tsc2007_is_pen_down(struct tsc2007 *ts);
  89
  90#if IS_ENABLED(CONFIG_TOUCHSCREEN_TSC2007_IIO)
  91/* defined in tsc2007_iio.c */
  92int tsc2007_iio_configure(struct tsc2007 *ts);
  93#else
  94static inline int tsc2007_iio_configure(struct tsc2007 *ts)
  95{
  96        return 0;
  97}
  98#endif /* CONFIG_TOUCHSCREEN_TSC2007_IIO */
  99
 100#endif /* _TSC2007_H */
 101