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 Cypress CY8CTMA140 (TMA140) touchscreen
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   4)  * (C) 2020 Linus Walleij <linus.walleij@linaro.org>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   5)  * (C) 2007 Cypress
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   6)  * (C) 2007 Google, Inc.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   7)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   8)  * Inspired by the tma140_skomer.c driver in the Samsung GT-S7710 code
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   9)  * drop. The GT-S7710 is codenamed "Skomer", the code also indicates
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  10)  * that the same touchscreen was used in a product called "Lucas".
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  11)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  12)  * The code drop for GT-S7710 also contains a firmware downloader and
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  13)  * 15 (!) versions of the firmware drop from Cypress. But here we assume
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  14)  * the firmware got downloaded to the touchscreen flash successfully and
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  15)  * just use it to read the fingers. The shipped vendor driver does the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  16)  * same.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  17)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  18) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  19) #include <asm/unaligned.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  20) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  21) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  22) #include <linux/input.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  23) #include <linux/input/touchscreen.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  24) #include <linux/input/mt.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  25) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  26) #include <linux/interrupt.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  27) #include <linux/io.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  28) #include <linux/i2c.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  29) #include <linux/regulator/consumer.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  30) #include <linux/delay.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  31) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  32) #define CY8CTMA140_NAME			"cy8ctma140"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  33) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  34) #define CY8CTMA140_MAX_FINGERS		4
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  35) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  36) #define CY8CTMA140_GET_FINGERS		0x00
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  37) #define CY8CTMA140_GET_FW_INFO		0x19
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  38) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  39) /* This message also fits some bytes for touchkeys, if used */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  40) #define CY8CTMA140_PACKET_SIZE		31
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  41) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  42) #define CY8CTMA140_INVALID_BUFFER_BIT	5
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  43) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  44) struct cy8ctma140 {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  45) 	struct input_dev *input;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  46) 	struct touchscreen_properties props;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  47) 	struct device *dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  48) 	struct i2c_client *client;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  49) 	struct regulator_bulk_data regulators[2];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  50) 	u8 prev_fingers;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  51) 	u8 prev_f1id;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  52) 	u8 prev_f2id;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  53) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  54) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  55) static void cy8ctma140_report(struct cy8ctma140 *ts, u8 *data, int n_fingers)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  56) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  57) 	static const u8 contact_offsets[] = { 0x03, 0x09, 0x10, 0x16 };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  58) 	u8 *buf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  59) 	u16 x, y;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  60) 	u8 w;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  61) 	u8 id;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  62) 	int slot;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  63) 	int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  64) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  65) 	for (i = 0; i < n_fingers; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  66) 		buf = &data[contact_offsets[i]];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  67) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  68) 		/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  69) 		 * Odd contacts have contact ID in the lower nibble of
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  70) 		 * the preceding byte, whereas even contacts have it in
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  71) 		 * the upper nibble of the following byte.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  72) 		 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  73) 		id = i % 2 ? buf[-1] & 0x0f : buf[5] >> 4;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  74) 		slot = input_mt_get_slot_by_key(ts->input, id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  75) 		if (slot < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  76) 			continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  77) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  78) 		x = get_unaligned_be16(buf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  79) 		y = get_unaligned_be16(buf + 2);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  80) 		w = buf[4];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  81) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  82) 		dev_dbg(ts->dev, "finger %d: ID %02x (%d, %d) w: %d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  83) 			slot, id, x, y, w);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  84) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  85) 		input_mt_slot(ts->input, slot);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  86) 		input_mt_report_slot_state(ts->input, MT_TOOL_FINGER, true);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  87) 		touchscreen_report_pos(ts->input, &ts->props, x, y, true);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  88) 		input_report_abs(ts->input, ABS_MT_TOUCH_MAJOR, w);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  89) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  90) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  91) 	input_mt_sync_frame(ts->input);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  92) 	input_sync(ts->input);
^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 irqreturn_t cy8ctma140_irq_thread(int irq, void *d)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  96) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  97) 	struct cy8ctma140 *ts = d;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  98) 	u8 cmdbuf[] = { CY8CTMA140_GET_FINGERS };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  99) 	u8 buf[CY8CTMA140_PACKET_SIZE];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) 	struct i2c_msg msg[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) 		{
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) 			.addr = ts->client->addr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) 			.flags = 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) 			.len = sizeof(cmdbuf),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) 			.buf = cmdbuf,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) 		}, {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) 			.addr = ts->client->addr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) 			.flags = I2C_M_RD,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) 			.len = sizeof(buf),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) 			.buf = buf,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) 		},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) 	};
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) 	u8 n_fingers;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) 	int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) 	ret = i2c_transfer(ts->client->adapter, msg, ARRAY_SIZE(msg));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) 	if (ret != ARRAY_SIZE(msg)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) 		if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) 			dev_err(ts->dev, "error reading message: %d\n", ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) 		else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) 			dev_err(ts->dev, "wrong number of messages\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) 		goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) 	if (buf[1] & BIT(CY8CTMA140_INVALID_BUFFER_BIT)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) 		dev_dbg(ts->dev, "invalid event\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) 		goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) 	n_fingers = buf[2] & 0x0f;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) 	if (n_fingers > CY8CTMA140_MAX_FINGERS) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) 		dev_err(ts->dev, "unexpected number of fingers: %d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) 			n_fingers);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) 		goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) 	cy8ctma140_report(ts, buf, n_fingers);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) 	return IRQ_HANDLED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) static int cy8ctma140_init(struct cy8ctma140 *ts)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) 	u8 addr[1];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) 	u8 buf[5];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) 	int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) 	addr[0] = CY8CTMA140_GET_FW_INFO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) 	ret = i2c_master_send(ts->client, addr, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) 	if (ret < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) 		dev_err(ts->dev, "error sending FW info message\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) 		return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) 	ret = i2c_master_recv(ts->client, buf, 5);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) 	if (ret < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) 		dev_err(ts->dev, "error receiving FW info message\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) 		return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) 	if (ret != 5) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) 		dev_err(ts->dev, "got only %d bytes\n", ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) 		return -EIO;
^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) 	dev_dbg(ts->dev, "vendor %c%c, HW ID %.2d, FW ver %.4d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) 		buf[0], buf[1], buf[3], buf[4]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) static int cy8ctma140_power_up(struct cy8ctma140 *ts)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) 	int error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) 	error = regulator_bulk_enable(ARRAY_SIZE(ts->regulators),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) 				      ts->regulators);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) 	if (error) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) 		dev_err(ts->dev, "failed to enable regulators\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) 		return error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) 	msleep(250);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) static void cy8ctma140_power_down(struct cy8ctma140 *ts)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) 	regulator_bulk_disable(ARRAY_SIZE(ts->regulators),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) 			       ts->regulators);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) /* Called from the registered devm action */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) static void cy8ctma140_power_off_action(void *d)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) 	struct cy8ctma140 *ts = d;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) 	cy8ctma140_power_down(ts);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) static int cy8ctma140_probe(struct i2c_client *client,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) 			    const struct i2c_device_id *id)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) 	struct cy8ctma140 *ts;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) 	struct input_dev *input;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) 	struct device *dev = &client->dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) 	int error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) 	ts = devm_kzalloc(dev, sizeof(*ts), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) 	if (!ts)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) 		return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) 	input = devm_input_allocate_device(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) 	if (!input)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) 		return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) 	ts->dev = dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) 	ts->client = client;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) 	ts->input = input;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) 	input_set_capability(input, EV_ABS, ABS_MT_POSITION_X);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) 	input_set_capability(input, EV_ABS, ABS_MT_POSITION_Y);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) 	/* One byte for width 0..255 so this is the limit */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) 	input_set_abs_params(input, ABS_MT_TOUCH_MAJOR, 0, 255, 0, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) 	/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) 	 * This sets up event max/min capabilities and fuzz.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) 	 * Some DT properties are compulsory so we do not need
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) 	 * to provide defaults for X/Y max or pressure max.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) 	 *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) 	 * We just initialize a very simple MT touchscreen here,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) 	 * some devices use the capability of this touchscreen to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) 	 * provide touchkeys, and in that case this needs to be
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) 	 * extended to handle touchkey input.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) 	 *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) 	 * The firmware takes care of finger tracking and dropping
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) 	 * invalid ranges.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) 	touchscreen_parse_properties(input, true, &ts->props);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) 	input_abs_set_fuzz(input, ABS_MT_POSITION_X, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) 	input_abs_set_fuzz(input, ABS_MT_POSITION_Y, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) 	error = input_mt_init_slots(input, CY8CTMA140_MAX_FINGERS,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) 				  INPUT_MT_DIRECT | INPUT_MT_DROP_UNUSED);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) 	if (error)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) 		return error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) 	input->name = CY8CTMA140_NAME;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) 	input->id.bustype = BUS_I2C;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) 	input_set_drvdata(input, ts);
^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) 	 * VCPIN is the analog voltage supply
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) 	 * VDD is the digital voltage supply
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) 	 * since the voltage range of VDD overlaps that of VCPIN,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) 	 * many designs to just supply both with a single voltage
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) 	 * source of ~3.3 V.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) 	ts->regulators[0].supply = "vcpin";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) 	ts->regulators[1].supply = "vdd";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) 	error = devm_regulator_bulk_get(dev, ARRAY_SIZE(ts->regulators),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) 				      ts->regulators);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) 	if (error) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) 		if (error != -EPROBE_DEFER)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) 			dev_err(dev, "Failed to get regulators %d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) 				error);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) 		return error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) 	error = cy8ctma140_power_up(ts);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) 	if (error)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) 		return error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) 	error = devm_add_action_or_reset(dev, cy8ctma140_power_off_action, ts);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) 	if (error) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) 		dev_err(dev, "failed to install power off handler\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) 		return error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) 	error = devm_request_threaded_irq(dev, client->irq,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) 					  NULL, cy8ctma140_irq_thread,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) 					  IRQF_ONESHOT, CY8CTMA140_NAME, ts);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) 	if (error) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) 		dev_err(dev, "irq %d busy? error %d\n", client->irq, error);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) 		return error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) 	error = cy8ctma140_init(ts);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) 	if (error)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) 		return error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) 	error = input_register_device(input);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) 	if (error)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) 		return error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) 	i2c_set_clientdata(client, ts);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) static int __maybe_unused cy8ctma140_suspend(struct device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) 	struct i2c_client *client = to_i2c_client(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) 	struct cy8ctma140 *ts = i2c_get_clientdata(client);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) 	if (!device_may_wakeup(&client->dev))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) 		cy8ctma140_power_down(ts);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) static int __maybe_unused cy8ctma140_resume(struct device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) 	struct i2c_client *client = to_i2c_client(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) 	struct cy8ctma140 *ts = i2c_get_clientdata(client);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) 	int error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) 	if (!device_may_wakeup(&client->dev)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) 		error = cy8ctma140_power_up(ts);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) 		if (error)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) 			return error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) 	return 0;
^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) static SIMPLE_DEV_PM_OPS(cy8ctma140_pm, cy8ctma140_suspend, cy8ctma140_resume);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) static const struct i2c_device_id cy8ctma140_idtable[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) 	{ CY8CTMA140_NAME, 0 },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) 	{ /* sentinel */ }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) MODULE_DEVICE_TABLE(i2c, cy8ctma140_idtable);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) static const struct of_device_id cy8ctma140_of_match[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) 	{ .compatible = "cypress,cy8ctma140", },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) 	{ /* sentinel */ }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) MODULE_DEVICE_TABLE(of, cy8ctma140_of_match);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) static struct i2c_driver cy8ctma140_driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) 	.driver		= {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) 		.name	= CY8CTMA140_NAME,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) 		.pm	= &cy8ctma140_pm,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) 		.of_match_table = cy8ctma140_of_match,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) 	},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) 	.id_table	= cy8ctma140_idtable,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) 	.probe		= cy8ctma140_probe,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) module_i2c_driver(cy8ctma140_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) MODULE_AUTHOR("Linus Walleij <linus.walleij@linaro.org>");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) MODULE_DESCRIPTION("CY8CTMA140 TouchScreen Driver");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) MODULE_LICENSE("GPL v2");