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

   1
   2/*
   3 * Copyright (c) 2008 MtekVision Co., Ltd.
   4 *      Kwangwoo Lee <kwlee@mtekvision.com>
   5 *
   6 * Using code from:
   7 *  - ads7846.c
   8 *      Copyright (c) 2005 David Brownell
   9 *      Copyright (c) 2006 Nokia Corporation
  10 *  - corgi_ts.c
  11 *      Copyright (C) 2004-2005 Richard Purdie
  12 *  - omap_ts.[hc], ads7846.h, ts_osk.c
  13 *      Copyright (C) 2002 MontaVista Software
  14 *      Copyright (C) 2004 Texas Instruments
  15 *      Copyright (C) 2005 Dirk Behme
  16 *
  17 *  This program is free software; you can redistribute it and/or modify
  18 *  it under the terms of the GNU General Public License version 2 as
  19 *  published by the Free Software Foundation.
  20 */
  21
  22#ifndef _TSC2007_H
  23#define _TSC2007_H
  24
  25#define TSC2007_MEASURE_TEMP0           (0x0 << 4)
  26#define TSC2007_MEASURE_AUX             (0x2 << 4)
  27#define TSC2007_MEASURE_TEMP1           (0x4 << 4)
  28#define TSC2007_ACTIVATE_XN             (0x8 << 4)
  29#define TSC2007_ACTIVATE_YN             (0x9 << 4)
  30#define TSC2007_ACTIVATE_YP_XN          (0xa << 4)
  31#define TSC2007_SETUP                   (0xb << 4)
  32#define TSC2007_MEASURE_X               (0xc << 4)
  33#define TSC2007_MEASURE_Y               (0xd << 4)
  34#define TSC2007_MEASURE_Z1              (0xe << 4)
  35#define TSC2007_MEASURE_Z2              (0xf << 4)
  36
  37#define TSC2007_POWER_OFF_IRQ_EN        (0x0 << 2)
  38#define TSC2007_ADC_ON_IRQ_DIS0         (0x1 << 2)
  39#define TSC2007_ADC_OFF_IRQ_EN          (0x2 << 2)
  40#define TSC2007_ADC_ON_IRQ_DIS1         (0x3 << 2)
  41
  42#define TSC2007_12BIT                   (0x0 << 1)
  43#define TSC2007_8BIT                    (0x1 << 1)
  44
  45#define MAX_12BIT                       ((1 << 12) - 1)
  46
  47#define ADC_ON_12BIT    (TSC2007_12BIT | TSC2007_ADC_ON_IRQ_DIS0)
  48
  49#define READ_Y          (ADC_ON_12BIT | TSC2007_MEASURE_Y)
  50#define READ_Z1         (ADC_ON_12BIT | TSC2007_MEASURE_Z1)
  51#define READ_Z2         (ADC_ON_12BIT | TSC2007_MEASURE_Z2)
  52#define READ_X          (ADC_ON_12BIT | TSC2007_MEASURE_X)
  53#define PWRDOWN         (TSC2007_12BIT | TSC2007_POWER_OFF_IRQ_EN)
  54
  55struct ts_event {
  56        u16     x;
  57        u16     y;
  58        u16     z1, z2;
  59};
  60
  61struct tsc2007 {
  62        struct input_dev        *input;
  63        char                    phys[32];
  64
  65        struct i2c_client       *client;
  66
  67        u16                     model;
  68        u16                     x_plate_ohms;
  69        u16                     max_rt;
  70        unsigned long           poll_period; /* in jiffies */
  71        int                     fuzzx;
  72        int                     fuzzy;
  73        int                     fuzzz;
  74
  75        unsigned int            gpio;
  76        int                     irq;
  77
  78        wait_queue_head_t       wait;
  79        bool                    stopped;
  80
  81        int                     (*get_pendown_state)(struct device *);
  82        void                    (*clear_penirq)(void);
  83
  84        struct mutex            mlock;
  85};
  86
  87int tsc2007_xfer(struct tsc2007 *tsc, u8 cmd);
  88u32 tsc2007_calculate_resistance(struct tsc2007 *tsc, struct ts_event *tc);
  89bool tsc2007_is_pen_down(struct tsc2007 *ts);
  90
  91#if IS_ENABLED(CONFIG_TOUCHSCREEN_TSC2007_IIO)
  92/* defined in tsc2007_iio.c */
  93int tsc2007_iio_configure(struct tsc2007 *ts);
  94#else
  95static inline int tsc2007_iio_configure(struct tsc2007 *ts)
  96{
  97        return 0;
  98}
  99#endif /* CONFIG_TOUCHSCREEN_TSC2007_IIO */
 100
 101#endif /* _TSC2007_H */
 102