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 */