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