Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   1) // SPDX-License-Identifier: GPL-2.0-or-later
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   3)  * Allwinner sunxi resistive touchscreen controller driver
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   4)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   5)  * Copyright (C) 2013 - 2014 Hans de Goede <hdegoede@redhat.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   6)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   7)  * The hwmon parts are based on work by Corentin LABBE which is:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   8)  * Copyright (C) 2013 Corentin LABBE <clabbe.montjoie@gmail.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   9)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  10) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  11) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  12)  * The sun4i-ts controller is capable of detecting a second touch, but when a
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  13)  * second touch is present then the accuracy becomes so bad the reported touch
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  14)  * location is not useable.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  15)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  16)  * The original android driver contains some complicated heuristics using the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  17)  * aprox. distance between the 2 touches to see if the user is making a pinch
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  18)  * open / close movement, and then reports emulated multi-touch events around
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  19)  * the last touch coordinate (as the dual-touch coordinates are worthless).
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  20)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  21)  * These kinds of heuristics are just asking for trouble (and don't belong
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  22)  * in the kernel). So this driver offers straight forward, reliable single
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  23)  * touch functionality only.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  24)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  25)  * s.a. A20 User Manual "1.15 TP" (Documentation/arm/sunxi.rst)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  26)  * (looks like the description in the A20 User Manual v1.3 is better
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  27)  * than the one in the A10 User Manual v.1.5)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  28)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  29) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  30) #include <linux/err.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  31) #include <linux/hwmon.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  32) #include <linux/thermal.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  33) #include <linux/init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  34) #include <linux/input.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  35) #include <linux/interrupt.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  36) #include <linux/io.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  37) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  38) #include <linux/of_platform.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  39) #include <linux/platform_device.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  40) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  41) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  42) #define TP_CTRL0		0x00
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  43) #define TP_CTRL1		0x04
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  44) #define TP_CTRL2		0x08
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  45) #define TP_CTRL3		0x0c
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  46) #define TP_INT_FIFOC		0x10
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  47) #define TP_INT_FIFOS		0x14
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  48) #define TP_TPR			0x18
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  49) #define TP_CDAT			0x1c
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  50) #define TEMP_DATA		0x20
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  51) #define TP_DATA			0x24
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  52) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  53) /* TP_CTRL0 bits */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  54) #define ADC_FIRST_DLY(x)	((x) << 24) /* 8 bits */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  55) #define ADC_FIRST_DLY_MODE(x)	((x) << 23)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  56) #define ADC_CLK_SEL(x)		((x) << 22)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  57) #define ADC_CLK_DIV(x)		((x) << 20) /* 3 bits */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  58) #define FS_DIV(x)		((x) << 16) /* 4 bits */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  59) #define T_ACQ(x)		((x) << 0) /* 16 bits */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  60) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  61) /* TP_CTRL1 bits */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  62) #define STYLUS_UP_DEBOUN(x)	((x) << 12) /* 8 bits */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  63) #define STYLUS_UP_DEBOUN_EN(x)	((x) << 9)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  64) #define TOUCH_PAN_CALI_EN(x)	((x) << 6)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  65) #define TP_DUAL_EN(x)		((x) << 5)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  66) #define TP_MODE_EN(x)		((x) << 4)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  67) #define TP_ADC_SELECT(x)	((x) << 3)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  68) #define ADC_CHAN_SELECT(x)	((x) << 0)  /* 3 bits */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  69) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  70) /* on sun6i, bits 3~6 are left shifted by 1 to 4~7 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  71) #define SUN6I_TP_MODE_EN(x)	((x) << 5)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  72) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  73) /* TP_CTRL2 bits */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  74) #define TP_SENSITIVE_ADJUST(x)	((x) << 28) /* 4 bits */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  75) #define TP_MODE_SELECT(x)	((x) << 26) /* 2 bits */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  76) #define PRE_MEA_EN(x)		((x) << 24)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  77) #define PRE_MEA_THRE_CNT(x)	((x) << 0) /* 24 bits */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  78) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  79) /* TP_CTRL3 bits */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  80) #define FILTER_EN(x)		((x) << 2)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  81) #define FILTER_TYPE(x)		((x) << 0)  /* 2 bits */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  82) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  83) /* TP_INT_FIFOC irq and fifo mask / control bits */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  84) #define TEMP_IRQ_EN(x)		((x) << 18)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  85) #define OVERRUN_IRQ_EN(x)	((x) << 17)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  86) #define DATA_IRQ_EN(x)		((x) << 16)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  87) #define TP_DATA_XY_CHANGE(x)	((x) << 13)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  88) #define FIFO_TRIG(x)		((x) << 8)  /* 5 bits */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  89) #define DATA_DRQ_EN(x)		((x) << 7)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  90) #define FIFO_FLUSH(x)		((x) << 4)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  91) #define TP_UP_IRQ_EN(x)		((x) << 1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  92) #define TP_DOWN_IRQ_EN(x)	((x) << 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  93) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  94) /* TP_INT_FIFOS irq and fifo status bits */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  95) #define TEMP_DATA_PENDING	BIT(18)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  96) #define FIFO_OVERRUN_PENDING	BIT(17)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  97) #define FIFO_DATA_PENDING	BIT(16)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  98) #define TP_IDLE_FLG		BIT(2)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  99) #define TP_UP_PENDING		BIT(1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) #define TP_DOWN_PENDING		BIT(0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) /* TP_TPR bits */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) #define TEMP_ENABLE(x)		((x) << 16)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) #define TEMP_PERIOD(x)		((x) << 0)  /* t = x * 256 * 16 / clkin */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) struct sun4i_ts_data {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) 	struct device *dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) 	struct input_dev *input;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) 	void __iomem *base;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) 	unsigned int irq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) 	bool ignore_fifo_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) 	int temp_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) 	int temp_offset;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) 	int temp_step;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) static void sun4i_ts_irq_handle_input(struct sun4i_ts_data *ts, u32 reg_val)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) 	u32 x, y;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) 	if (reg_val & FIFO_DATA_PENDING) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) 		x = readl(ts->base + TP_DATA);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) 		y = readl(ts->base + TP_DATA);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) 		/* The 1st location reported after an up event is unreliable */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) 		if (!ts->ignore_fifo_data) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) 			input_report_abs(ts->input, ABS_X, x);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) 			input_report_abs(ts->input, ABS_Y, y);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) 			/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) 			 * The hardware has a separate down status bit, but
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) 			 * that gets set before we get the first location,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) 			 * resulting in reporting a click on the old location.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) 			 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) 			input_report_key(ts->input, BTN_TOUCH, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) 			input_sync(ts->input);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) 		} else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) 			ts->ignore_fifo_data = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) 	if (reg_val & TP_UP_PENDING) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) 		ts->ignore_fifo_data = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) 		input_report_key(ts->input, BTN_TOUCH, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) 		input_sync(ts->input);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) static irqreturn_t sun4i_ts_irq(int irq, void *dev_id)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) 	struct sun4i_ts_data *ts = dev_id;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) 	u32 reg_val;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) 	reg_val  = readl(ts->base + TP_INT_FIFOS);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) 	if (reg_val & TEMP_DATA_PENDING)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) 		ts->temp_data = readl(ts->base + TEMP_DATA);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) 	if (ts->input)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) 		sun4i_ts_irq_handle_input(ts, reg_val);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) 	writel(reg_val, ts->base + TP_INT_FIFOS);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) 	return IRQ_HANDLED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) static int sun4i_ts_open(struct input_dev *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) 	struct sun4i_ts_data *ts = input_get_drvdata(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) 	/* Flush, set trig level to 1, enable temp, data and up irqs */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) 	writel(TEMP_IRQ_EN(1) | DATA_IRQ_EN(1) | FIFO_TRIG(1) | FIFO_FLUSH(1) |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) 		TP_UP_IRQ_EN(1), ts->base + TP_INT_FIFOC);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) static void sun4i_ts_close(struct input_dev *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) 	struct sun4i_ts_data *ts = input_get_drvdata(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) 	/* Deactivate all input IRQs */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) 	writel(TEMP_IRQ_EN(1), ts->base + TP_INT_FIFOC);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) static int sun4i_get_temp(const struct sun4i_ts_data *ts, int *temp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) 	/* No temp_data until the first irq */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) 	if (ts->temp_data == -1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) 		return -EAGAIN;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) 	*temp = ts->temp_data * ts->temp_step - ts->temp_offset;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) static int sun4i_get_tz_temp(void *data, int *temp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) 	return sun4i_get_temp(data, temp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) static const struct thermal_zone_of_device_ops sun4i_ts_tz_ops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) 	.get_temp = sun4i_get_tz_temp,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) static ssize_t show_temp(struct device *dev, struct device_attribute *devattr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) 			 char *buf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) 	struct sun4i_ts_data *ts = dev_get_drvdata(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) 	int temp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) 	int error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) 	error = sun4i_get_temp(ts, &temp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) 	if (error)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) 		return error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) 	return sprintf(buf, "%d\n", temp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) static ssize_t show_temp_label(struct device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) 			      struct device_attribute *devattr, char *buf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) 	return sprintf(buf, "SoC temperature\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) static DEVICE_ATTR(temp1_input, S_IRUGO, show_temp, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) static DEVICE_ATTR(temp1_label, S_IRUGO, show_temp_label, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) static struct attribute *sun4i_ts_attrs[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) 	&dev_attr_temp1_input.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) 	&dev_attr_temp1_label.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) 	NULL
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) ATTRIBUTE_GROUPS(sun4i_ts);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) static int sun4i_ts_probe(struct platform_device *pdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) 	struct sun4i_ts_data *ts;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) 	struct device *dev = &pdev->dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) 	struct device_node *np = dev->of_node;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) 	struct device *hwmon;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) 	struct thermal_zone_device *thermal;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) 	int error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) 	u32 reg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) 	bool ts_attached;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) 	u32 tp_sensitive_adjust = 15;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) 	u32 filter_type = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) 	ts = devm_kzalloc(dev, sizeof(struct sun4i_ts_data), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) 	if (!ts)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) 		return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) 	ts->dev = dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) 	ts->ignore_fifo_data = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) 	ts->temp_data = -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) 	if (of_device_is_compatible(np, "allwinner,sun6i-a31-ts")) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) 		/* Allwinner SDK has temperature (C) = (value / 6) - 271 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) 		ts->temp_offset = 271000;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) 		ts->temp_step = 167;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) 	} else if (of_device_is_compatible(np, "allwinner,sun4i-a10-ts")) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) 		/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) 		 * The A10 temperature sensor has quite a wide spread, these
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) 		 * parameters are based on the averaging of the calibration
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) 		 * results of 4 completely different boards, with a spread of
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) 		 * temp_step from 0.096 - 0.170 and temp_offset from 176 - 331.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) 		 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) 		ts->temp_offset = 257000;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) 		ts->temp_step = 133;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) 	} else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) 		/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) 		 * The user manuals do not contain the formula for calculating
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) 		 * the temperature. The formula used here is from the AXP209,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) 		 * which is designed by X-Powers, an affiliate of Allwinner:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) 		 *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) 		 *     temperature (C) = (value * 0.1) - 144.7
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) 		 *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) 		 * Allwinner does not have any documentation whatsoever for
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) 		 * this hardware. Moreover, it is claimed that the sensor
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) 		 * is inaccurate and cannot work properly.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) 		 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) 		ts->temp_offset = 144700;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) 		ts->temp_step = 100;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) 	ts_attached = of_property_read_bool(np, "allwinner,ts-attached");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) 	if (ts_attached) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) 		ts->input = devm_input_allocate_device(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) 		if (!ts->input)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) 			return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) 		ts->input->name = pdev->name;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) 		ts->input->phys = "sun4i_ts/input0";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) 		ts->input->open = sun4i_ts_open;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) 		ts->input->close = sun4i_ts_close;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) 		ts->input->id.bustype = BUS_HOST;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) 		ts->input->id.vendor = 0x0001;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) 		ts->input->id.product = 0x0001;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) 		ts->input->id.version = 0x0100;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) 		ts->input->evbit[0] =  BIT(EV_SYN) | BIT(EV_KEY) | BIT(EV_ABS);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) 		__set_bit(BTN_TOUCH, ts->input->keybit);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) 		input_set_abs_params(ts->input, ABS_X, 0, 4095, 0, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) 		input_set_abs_params(ts->input, ABS_Y, 0, 4095, 0, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) 		input_set_drvdata(ts->input, ts);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) 	ts->base = devm_platform_ioremap_resource(pdev, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) 	if (IS_ERR(ts->base))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) 		return PTR_ERR(ts->base);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) 	ts->irq = platform_get_irq(pdev, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) 	error = devm_request_irq(dev, ts->irq, sun4i_ts_irq, 0, "sun4i-ts", ts);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) 	if (error)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) 		return error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) 	/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) 	 * Select HOSC clk, clkin = clk / 6, adc samplefreq = clkin / 8192,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) 	 * t_acq = clkin / (16 * 64)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) 	writel(ADC_CLK_SEL(0) | ADC_CLK_DIV(2) | FS_DIV(7) | T_ACQ(63),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) 	       ts->base + TP_CTRL0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) 	/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) 	 * tp_sensitive_adjust is an optional property
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) 	 * tp_mode = 0 : only x and y coordinates, as we don't use dual touch
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) 	of_property_read_u32(np, "allwinner,tp-sensitive-adjust",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) 			     &tp_sensitive_adjust);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) 	writel(TP_SENSITIVE_ADJUST(tp_sensitive_adjust) | TP_MODE_SELECT(0),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) 	       ts->base + TP_CTRL2);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) 	/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) 	 * Enable median and averaging filter, optional property for
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) 	 * filter type.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) 	of_property_read_u32(np, "allwinner,filter-type", &filter_type);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) 	writel(FILTER_EN(1) | FILTER_TYPE(filter_type), ts->base + TP_CTRL3);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) 	/* Enable temperature measurement, period 1953 (2 seconds) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) 	writel(TEMP_ENABLE(1) | TEMP_PERIOD(1953), ts->base + TP_TPR);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) 	/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) 	 * Set stylus up debounce to aprox 10 ms, enable debounce, and
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) 	 * finally enable tp mode.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) 	reg = STYLUS_UP_DEBOUN(5) | STYLUS_UP_DEBOUN_EN(1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) 	if (of_device_is_compatible(np, "allwinner,sun6i-a31-ts"))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) 		reg |= SUN6I_TP_MODE_EN(1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) 	else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) 		reg |= TP_MODE_EN(1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) 	writel(reg, ts->base + TP_CTRL1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) 	/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) 	 * The thermal core does not register hwmon devices for DT-based
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) 	 * thermal zone sensors, such as this one.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) 	hwmon = devm_hwmon_device_register_with_groups(ts->dev, "sun4i_ts",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) 						       ts, sun4i_ts_groups);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356) 	if (IS_ERR(hwmon))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357) 		return PTR_ERR(hwmon);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359) 	thermal = devm_thermal_zone_of_sensor_register(ts->dev, 0, ts,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) 						       &sun4i_ts_tz_ops);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361) 	if (IS_ERR(thermal))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362) 		return PTR_ERR(thermal);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364) 	writel(TEMP_IRQ_EN(1), ts->base + TP_INT_FIFOC);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366) 	if (ts_attached) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367) 		error = input_register_device(ts->input);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368) 		if (error) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369) 			writel(0, ts->base + TP_INT_FIFOC);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370) 			return error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374) 	platform_set_drvdata(pdev, ts);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378) static int sun4i_ts_remove(struct platform_device *pdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380) 	struct sun4i_ts_data *ts = platform_get_drvdata(pdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382) 	/* Explicit unregister to avoid open/close changing the imask later */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383) 	if (ts->input)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384) 		input_unregister_device(ts->input);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386) 	/* Deactivate all IRQs */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387) 	writel(0, ts->base + TP_INT_FIFOC);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392) static const struct of_device_id sun4i_ts_of_match[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 393) 	{ .compatible = "allwinner,sun4i-a10-ts", },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 394) 	{ .compatible = "allwinner,sun5i-a13-ts", },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 395) 	{ .compatible = "allwinner,sun6i-a31-ts", },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 396) 	{ /* sentinel */ }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 397) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 398) MODULE_DEVICE_TABLE(of, sun4i_ts_of_match);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 399) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 400) static struct platform_driver sun4i_ts_driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 401) 	.driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 402) 		.name	= "sun4i-ts",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 403) 		.of_match_table = of_match_ptr(sun4i_ts_of_match),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 404) 	},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 405) 	.probe	= sun4i_ts_probe,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 406) 	.remove	= sun4i_ts_remove,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 407) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 408) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 409) module_platform_driver(sun4i_ts_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 410) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 411) MODULE_DESCRIPTION("Allwinner sun4i resistive touchscreen controller driver");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 412) MODULE_AUTHOR("Hans de Goede <hdegoede@redhat.com>");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 413) MODULE_LICENSE("GPL");