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 
22 struct 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 
54 struct ts_event {
55 	u16	x;
56 	u16	y;
57 	u16	z1, z2;
58 };
59 
60 struct 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 
86 int tsc2007_xfer(struct tsc2007 *tsc, u8 cmd);
87 u32 tsc2007_calculate_resistance(struct tsc2007 *tsc, struct ts_event *tc);
88 bool tsc2007_is_pen_down(struct tsc2007 *ts);
89 
90 #if IS_ENABLED(CONFIG_TOUCHSCREEN_TSC2007_IIO)
91 /* defined in tsc2007_iio.c */
92 int tsc2007_iio_configure(struct tsc2007 *ts);
93 #else
tsc2007_iio_configure(struct tsc2007 * ts)94 static 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