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

source code of linux/drivers/input/touchscreen/tsc2007.h