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
  55 struct ts_event {
  56         u16     x;
  57         u16     y;
  58         u16     z1, z2;
  59 };
  60
  61 struct 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
  87 int tsc2007_xfer(struct tsc2007 *tsc, u8 cmd);
  88 u32 tsc2007_calculate_resistance(struct tsc2007 *tsc, struct ts_event *tc);
  89 bool tsc2007_is_pen_down(struct tsc2007 *ts);
  90
  91 #if IS_ENABLED(CONFIG_TOUCHSCREEN_TSC2007_IIO)
  92 /* defined in tsc2007_iio.c */
  93 int tsc2007_iio_configure(struct tsc2007 *ts);
  94 #else
  95 static inline int tsc2007_iio_configure(struct tsc2007 *ts)
  96 {
  97         return 0;
  98 }
  99 #endif /* CONFIG_TOUCHSCREEN_TSC2007_IIO */
 100
 101 #endif /* _TSC2007_H */