Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   1) // SPDX-License-Identifier: GPL-2.0-only
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   3)  *  Driver for Ntrig/Microsoft Touchscreens over SPI
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   4)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   5)  *  Copyright (c) 2016 Red Hat Inc.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   6)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   7) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   8) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   9) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  10) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  11) #include <linux/delay.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  12) #include <linux/gpio/consumer.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  13) #include <linux/input.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  14) #include <linux/input/mt.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  15) #include <linux/interrupt.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  16) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  17) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  18) #include <linux/spi/spi.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  19) #include <linux/acpi.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  20) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  21) #include <asm/unaligned.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  22) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  23) #define SURFACE3_PACKET_SIZE	264
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  24) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  25) #define SURFACE3_REPORT_TOUCH	0xd2
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  26) #define SURFACE3_REPORT_PEN	0x16
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  27) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  28) struct surface3_ts_data {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  29) 	struct spi_device *spi;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  30) 	struct gpio_desc *gpiod_rst[2];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  31) 	struct input_dev *input_dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  32) 	struct input_dev *pen_input_dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  33) 	int pen_tool;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  34) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  35) 	u8 rd_buf[SURFACE3_PACKET_SIZE]		____cacheline_aligned;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  36) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  37) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  38) struct surface3_ts_data_finger {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  39) 	u8 status;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  40) 	__le16 tracking_id;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  41) 	__le16 x;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  42) 	__le16 cx;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  43) 	__le16 y;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  44) 	__le16 cy;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  45) 	__le16 width;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  46) 	__le16 height;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  47) 	u32 padding;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  48) } __packed;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  49) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  50) struct surface3_ts_data_pen {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  51) 	u8 status;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  52) 	__le16 x;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  53) 	__le16 y;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  54) 	__le16 pressure;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  55) 	u8 padding;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  56) } __packed;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  57) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  58) static int surface3_spi_read(struct surface3_ts_data *ts_data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  59) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  60) 	struct spi_device *spi = ts_data->spi;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  61) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  62) 	memset(ts_data->rd_buf, 0, sizeof(ts_data->rd_buf));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  63) 	return spi_read(spi, ts_data->rd_buf, sizeof(ts_data->rd_buf));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  64) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  65) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  66) static void surface3_spi_report_touch(struct surface3_ts_data *ts_data,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  67) 				   struct surface3_ts_data_finger *finger)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  68) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  69) 	int st = finger->status & 0x01;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  70) 	int slot;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  71) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  72) 	slot = input_mt_get_slot_by_key(ts_data->input_dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  73) 				get_unaligned_le16(&finger->tracking_id));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  74) 	if (slot < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  75) 		return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  76) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  77) 	input_mt_slot(ts_data->input_dev, slot);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  78) 	input_mt_report_slot_state(ts_data->input_dev, MT_TOOL_FINGER, st);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  79) 	if (st) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  80) 		input_report_abs(ts_data->input_dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  81) 				 ABS_MT_POSITION_X,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  82) 				 get_unaligned_le16(&finger->x));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  83) 		input_report_abs(ts_data->input_dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  84) 				 ABS_MT_POSITION_Y,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  85) 				 get_unaligned_le16(&finger->y));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  86) 		input_report_abs(ts_data->input_dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  87) 				 ABS_MT_WIDTH_MAJOR,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  88) 				 get_unaligned_le16(&finger->width));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  89) 		input_report_abs(ts_data->input_dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  90) 				 ABS_MT_WIDTH_MINOR,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  91) 				 get_unaligned_le16(&finger->height));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  92) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  93) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  94) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  95) static void surface3_spi_process_touch(struct surface3_ts_data *ts_data, u8 *data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  96) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  97) 	u16 timestamp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  98) 	unsigned int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  99) 	timestamp = get_unaligned_le16(&data[15]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) 	for (i = 0; i < 13; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) 		struct surface3_ts_data_finger *finger;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) 		finger = (struct surface3_ts_data_finger *)&data[17 +
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) 				i * sizeof(struct surface3_ts_data_finger)];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) 		/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) 		 * When bit 5 of status is 1, it marks the end of the report:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) 		 * - touch present: 0xe7
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) 		 * - touch released: 0xe4
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) 		 * - nothing valuable: 0xff
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) 		 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) 		if (finger->status & 0x10)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) 			break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) 		surface3_spi_report_touch(ts_data, finger);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) 	input_mt_sync_frame(ts_data->input_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) 	input_sync(ts_data->input_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) static void surface3_spi_report_pen(struct surface3_ts_data *ts_data,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) 				    struct surface3_ts_data_pen *pen)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) 	struct input_dev *dev = ts_data->pen_input_dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) 	int st = pen->status;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) 	int prox = st & 0x01;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) 	int rubber = st & 0x18;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) 	int tool = (prox && rubber) ? BTN_TOOL_RUBBER : BTN_TOOL_PEN;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) 	/* fake proximity out to switch tools */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) 	if (ts_data->pen_tool != tool) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) 		input_report_key(dev, ts_data->pen_tool, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) 		input_sync(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) 		ts_data->pen_tool = tool;
^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) 	input_report_key(dev, BTN_TOUCH, st & 0x12);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) 	input_report_key(dev, ts_data->pen_tool, prox);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) 	if (st) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) 		input_report_key(dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) 				 BTN_STYLUS,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) 				 st & 0x04);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) 		input_report_abs(dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) 				 ABS_X,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) 				 get_unaligned_le16(&pen->x));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) 		input_report_abs(dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) 				 ABS_Y,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) 				 get_unaligned_le16(&pen->y));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) 		input_report_abs(dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) 				 ABS_PRESSURE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) 				 get_unaligned_le16(&pen->pressure));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) static void surface3_spi_process_pen(struct surface3_ts_data *ts_data, u8 *data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) 	struct surface3_ts_data_pen *pen;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) 	pen = (struct surface3_ts_data_pen *)&data[15];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) 	surface3_spi_report_pen(ts_data, pen);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) 	input_sync(ts_data->pen_input_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) static void surface3_spi_process(struct surface3_ts_data *ts_data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) 	static const char header[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) 		0xff, 0xff, 0xff, 0xff, 0xa5, 0x5a, 0xe7, 0x7e, 0x01
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) 	};
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) 	u8 *data = ts_data->rd_buf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) 	if (memcmp(header, data, sizeof(header)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) 		dev_err(&ts_data->spi->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) 			"%s header error: %*ph, ignoring...\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) 			__func__, (int)sizeof(header), data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) 	switch (data[9]) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) 	case SURFACE3_REPORT_TOUCH:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) 		surface3_spi_process_touch(ts_data, data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) 	case SURFACE3_REPORT_PEN:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) 		surface3_spi_process_pen(ts_data, data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) 	default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) 		dev_err(&ts_data->spi->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) 			"%s unknown packet type: %x, ignoring...\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) 			__func__, data[9]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) static irqreturn_t surface3_spi_irq_handler(int irq, void *dev_id)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) 	struct surface3_ts_data *data = dev_id;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) 	if (surface3_spi_read(data))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) 		return IRQ_HANDLED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) 	dev_dbg(&data->spi->dev, "%s received -> %*ph\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) 		__func__, SURFACE3_PACKET_SIZE, data->rd_buf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) 	surface3_spi_process(data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) 	return IRQ_HANDLED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) static void surface3_spi_power(struct surface3_ts_data *data, bool on)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) 	gpiod_set_value(data->gpiod_rst[0], on);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) 	gpiod_set_value(data->gpiod_rst[1], on);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) 	/* let the device settle a little */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) 	msleep(20);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220)  * surface3_spi_get_gpio_config - Get GPIO config from ACPI/DT
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222)  * @ts: surface3_spi_ts_data pointer
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) static int surface3_spi_get_gpio_config(struct surface3_ts_data *data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) 	int error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) 	struct device *dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) 	struct gpio_desc *gpiod;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) 	int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) 	dev = &data->spi->dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) 	/* Get the reset lines GPIO pin number */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) 	for (i = 0; i < 2; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) 		gpiod = devm_gpiod_get_index(dev, NULL, i, GPIOD_OUT_LOW);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) 		if (IS_ERR(gpiod)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) 			error = PTR_ERR(gpiod);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) 			if (error != -EPROBE_DEFER)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) 				dev_err(dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) 					"Failed to get power GPIO %d: %d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) 					i,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) 					error);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) 			return error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) 		data->gpiod_rst[i] = gpiod;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) static int surface3_spi_create_touch_input(struct surface3_ts_data *data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) 	struct input_dev *input;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) 	int error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) 	input = devm_input_allocate_device(&data->spi->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) 	if (!input)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) 		return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) 	data->input_dev = input;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) 	input_set_abs_params(input, ABS_MT_POSITION_X, 0, 9600, 0, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) 	input_abs_set_res(input, ABS_MT_POSITION_X, 40);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) 	input_set_abs_params(input, ABS_MT_POSITION_Y, 0, 7200, 0, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) 	input_abs_set_res(input, ABS_MT_POSITION_Y, 48);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) 	input_set_abs_params(input, ABS_MT_WIDTH_MAJOR, 0, 1024, 0, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) 	input_set_abs_params(input, ABS_MT_WIDTH_MINOR, 0, 1024, 0, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) 	input_mt_init_slots(input, 10, INPUT_MT_DIRECT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) 	input->name = "Surface3 SPI Capacitive TouchScreen";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) 	input->phys = "input/ts";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) 	input->id.bustype = BUS_SPI;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) 	input->id.vendor = 0x045e;	/* Microsoft */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) 	input->id.product = 0x0001;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) 	input->id.version = 0x0000;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) 	error = input_register_device(input);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) 	if (error) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) 		dev_err(&data->spi->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) 			"Failed to register input device: %d", error);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) 		return error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) static int surface3_spi_create_pen_input(struct surface3_ts_data *data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) 	struct input_dev *input;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) 	int error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) 	input = devm_input_allocate_device(&data->spi->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) 	if (!input)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) 		return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) 	data->pen_input_dev = input;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) 	data->pen_tool = BTN_TOOL_PEN;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) 	__set_bit(INPUT_PROP_DIRECT, input->propbit);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) 	__set_bit(INPUT_PROP_POINTER, input->propbit);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) 	input_set_abs_params(input, ABS_X, 0, 9600, 0, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) 	input_abs_set_res(input, ABS_X, 40);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) 	input_set_abs_params(input, ABS_Y, 0, 7200, 0, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) 	input_abs_set_res(input, ABS_Y, 48);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) 	input_set_abs_params(input, ABS_PRESSURE, 0, 1024, 0, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) 	input_set_capability(input, EV_KEY, BTN_TOUCH);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) 	input_set_capability(input, EV_KEY, BTN_STYLUS);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) 	input_set_capability(input, EV_KEY, BTN_TOOL_PEN);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) 	input_set_capability(input, EV_KEY, BTN_TOOL_RUBBER);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) 	input->name = "Surface3 SPI Pen Input";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) 	input->phys = "input/ts";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) 	input->id.bustype = BUS_SPI;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) 	input->id.vendor = 0x045e;     /* Microsoft */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) 	input->id.product = 0x0002;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) 	input->id.version = 0x0000;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) 	error = input_register_device(input);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) 	if (error) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) 		dev_err(&data->spi->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) 			"Failed to register input device: %d", error);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) 		return error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) static int surface3_spi_probe(struct spi_device *spi)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) 	struct surface3_ts_data *data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) 	int error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) 	/* Set up SPI*/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) 	spi->bits_per_word = 8;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) 	spi->mode = SPI_MODE_0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) 	error = spi_setup(spi);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) 	if (error)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) 		return error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) 	data = devm_kzalloc(&spi->dev, sizeof(*data), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) 	if (!data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) 		return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) 	data->spi = spi;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) 	spi_set_drvdata(spi, data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) 	error = surface3_spi_get_gpio_config(data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) 	if (error)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) 		return error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) 	surface3_spi_power(data, true);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) 	surface3_spi_power(data, false);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) 	surface3_spi_power(data, true);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356) 	error = surface3_spi_create_touch_input(data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357) 	if (error)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358) 		return error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) 	error = surface3_spi_create_pen_input(data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361) 	if (error)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362) 		return error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364) 	error = devm_request_threaded_irq(&spi->dev, spi->irq,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) 					  NULL, surface3_spi_irq_handler,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366) 					  IRQF_ONESHOT,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367) 					  "Surface3-irq", data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368) 	if (error)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369) 		return error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371) 	return 0;
^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) static int __maybe_unused surface3_spi_suspend(struct device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376) 	struct spi_device *spi = to_spi_device(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377) 	struct surface3_ts_data *data = spi_get_drvdata(spi);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379) 	disable_irq(data->spi->irq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381) 	surface3_spi_power(data, false);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386) static int __maybe_unused surface3_spi_resume(struct device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388) 	struct spi_device *spi = to_spi_device(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389) 	struct surface3_ts_data *data = spi_get_drvdata(spi);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391) 	surface3_spi_power(data, true);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 393) 	enable_irq(data->spi->irq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 394) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 395) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 396) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 397) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 398) static SIMPLE_DEV_PM_OPS(surface3_spi_pm_ops,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 399) 			 surface3_spi_suspend,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 400) 			 surface3_spi_resume);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 401) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 402) #ifdef CONFIG_ACPI
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 403) static const struct acpi_device_id surface3_spi_acpi_match[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 404) 	{ "MSHW0037", 0 },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 405) 	{ }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 406) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 407) MODULE_DEVICE_TABLE(acpi, surface3_spi_acpi_match);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 408) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 409) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 410) static struct spi_driver surface3_spi_driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 411) 	.driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 412) 		.name	= "Surface3-spi",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 413) 		.acpi_match_table = ACPI_PTR(surface3_spi_acpi_match),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 414) 		.pm = &surface3_spi_pm_ops,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 415) 	},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 416) 	.probe = surface3_spi_probe,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 417) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 418) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 419) module_spi_driver(surface3_spi_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 420) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 421) MODULE_AUTHOR("Benjamin Tissoires <benjamin.tissoires@gmail.com>");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 422) MODULE_DESCRIPTION("Surface 3 SPI touchscreen driver");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 423) MODULE_LICENSE("GPL v2");