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 #include <linux/input/touchscreen.h> 23 struct gpio_desc; 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 struct touchscreen_properties prop; 68 u16 model; 69 u16 x_plate_ohms; 70 u16 max_rt; 71 unsigned long poll_period; /* in jiffies */ 72 int fuzzx; 73 int fuzzy; 74 int fuzzz; 75 76 struct gpio_desc *gpiod; 77 int irq; 78 79 wait_queue_head_t wait; 80 bool stopped; 81 82 int (*get_pendown_state)(struct device *); 83 void (*clear_penirq)(void); 84 85 struct mutex mlock; 86 }; 87 88 int tsc2007_xfer(struct tsc2007 *tsc, u8 cmd); 89 u32 tsc2007_calculate_resistance(struct tsc2007 *tsc, struct ts_event *tc); 90 bool tsc2007_is_pen_down(struct tsc2007 *ts); 91 92 #if IS_ENABLED(CONFIG_TOUCHSCREEN_TSC2007_IIO) 93 /* defined in tsc2007_iio.c */ 94 int tsc2007_iio_configure(struct tsc2007 *ts); 95 #else tsc2007_iio_configure(struct tsc2007 * ts)96static inline int tsc2007_iio_configure(struct tsc2007 *ts) 97 { 98 return 0; 99 } 100 #endif /* CONFIG_TOUCHSCREEN_TSC2007_IIO */ 101 102 #endif /* _TSC2007_H */ 103