Adding upstream version 6.6.15.upstream/6.6.15

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 289 insertions, 0 deletions

diff --git a/drivers/input/touchscreen/cy8ctmg110_ts.c b/drivers/input/touchscreen/cy8ctmg110_ts.c
new file mode 100644
index 0000000000..54d6c4869e
--- /dev/null
+++ b/drivers/input/touchscreen/cy8ctmg110_ts.c
@@ -0,0 +1,289 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Driver for cypress touch screen controller
+ *
+ * Copyright (c) 2009 Aava Mobile
+ *
+ * Some cleanups by Alan Cox <alan@linux.intel.com>
+ */
+
+#include <linux/i2c.h>
+#include <linux/input.h>
+#include <linux/interrupt.h>
+#include <linux/gpio/consumer.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <asm/byteorder.h>
+
+#define CY8CTMG110_DRIVER_NAME      "cy8ctmg110"
+
+/* Touch coordinates */
+#define CY8CTMG110_X_MIN		0
+#define CY8CTMG110_Y_MIN		0
+#define CY8CTMG110_X_MAX		759
+#define CY8CTMG110_Y_MAX		465
+
+
+/* cy8ctmg110 register definitions */
+#define CY8CTMG110_TOUCH_WAKEUP_TIME	0
+#define CY8CTMG110_TOUCH_SLEEP_TIME	2
+#define CY8CTMG110_TOUCH_X1		3
+#define CY8CTMG110_TOUCH_Y1		5
+#define CY8CTMG110_TOUCH_X2		7
+#define CY8CTMG110_TOUCH_Y2		9
+#define CY8CTMG110_FINGERS		11
+#define CY8CTMG110_GESTURE		12
+#define CY8CTMG110_REG_MAX		13
+
+
+/*
+ * The touch driver structure.
+ */
+struct cy8ctmg110 {
+	struct input_dev *input;
+	char phys[32];
+	struct i2c_client *client;
+	struct gpio_desc *reset_gpio;
+};
+
+/*
+ * cy8ctmg110_power is the routine that is called when touch hardware
+ * is being powered off or on. When powering on this routine de-asserts
+ * the RESET line, when powering off reset line is asserted.
+ */
+static void cy8ctmg110_power(struct cy8ctmg110 *ts, bool poweron)
+{
+	if (ts->reset_gpio)
+		gpiod_set_value_cansleep(ts->reset_gpio, !poweron);
+}
+
+static int cy8ctmg110_write_regs(struct cy8ctmg110 *tsc, unsigned char reg,
+		unsigned char len, unsigned char *value)
+{
+	struct i2c_client *client = tsc->client;
+	int ret;
+	unsigned char i2c_data[6];
+
+	BUG_ON(len > 5);
+
+	i2c_data[0] = reg;
+	memcpy(i2c_data + 1, value, len);
+
+	ret = i2c_master_send(client, i2c_data, len + 1);
+	if (ret != len + 1) {
+		dev_err(&client->dev, "i2c write data cmd failed\n");
+		return ret < 0 ? ret : -EIO;
+	}
+
+	return 0;
+}
+
+static int cy8ctmg110_read_regs(struct cy8ctmg110 *tsc,
+		unsigned char *data, unsigned char len, unsigned char cmd)
+{
+	struct i2c_client *client = tsc->client;
+	int ret;
+	struct i2c_msg msg[2] = {
+		/* first write slave position to i2c devices */
+		{
+			.addr = client->addr,
+			.len = 1,
+			.buf = &cmd
+		},
+		/* Second read data from position */
+		{
+			.addr = client->addr,
+			.flags = I2C_M_RD,
+			.len = len,
+			.buf = data
+		}
+	};
+
+	ret = i2c_transfer(client->adapter, msg, 2);
+	if (ret < 0)
+		return ret;
+
+	return 0;
+}
+
+static int cy8ctmg110_touch_pos(struct cy8ctmg110 *tsc)
+{
+	struct input_dev *input = tsc->input;
+	unsigned char reg_p[CY8CTMG110_REG_MAX];
+
+	memset(reg_p, 0, CY8CTMG110_REG_MAX);
+
+	/* Reading coordinates */
+	if (cy8ctmg110_read_regs(tsc, reg_p, 9, CY8CTMG110_TOUCH_X1) != 0)
+		return -EIO;
+
+	/* Number of touch */
+	if (reg_p[8] == 0) {
+		input_report_key(input, BTN_TOUCH, 0);
+	} else  {
+		input_report_key(input, BTN_TOUCH, 1);
+		input_report_abs(input, ABS_X,
+				 be16_to_cpup((__be16 *)(reg_p + 0)));
+		input_report_abs(input, ABS_Y,
+				 be16_to_cpup((__be16 *)(reg_p + 2)));
+	}
+
+	input_sync(input);
+
+	return 0;
+}
+
+static int cy8ctmg110_set_sleepmode(struct cy8ctmg110 *ts, bool sleep)
+{
+	unsigned char reg_p[3];
+
+	if (sleep) {
+		reg_p[0] = 0x00;
+		reg_p[1] = 0xff;
+		reg_p[2] = 5;
+	} else {
+		reg_p[0] = 0x10;
+		reg_p[1] = 0xff;
+		reg_p[2] = 0;
+	}
+
+	return cy8ctmg110_write_regs(ts, CY8CTMG110_TOUCH_WAKEUP_TIME, 3, reg_p);
+}
+
+static irqreturn_t cy8ctmg110_irq_thread(int irq, void *dev_id)
+{
+	struct cy8ctmg110 *tsc = dev_id;
+
+	cy8ctmg110_touch_pos(tsc);
+
+	return IRQ_HANDLED;
+}
+
+static void cy8ctmg110_shut_off(void *_ts)
+{
+	struct cy8ctmg110 *ts = _ts;
+
+	cy8ctmg110_set_sleepmode(ts, true);
+	cy8ctmg110_power(ts, false);
+}
+
+static int cy8ctmg110_probe(struct i2c_client *client)
+{
+	struct cy8ctmg110 *ts;
+	struct input_dev *input_dev;
+	int err;
+
+	if (!i2c_check_functionality(client->adapter,
+					I2C_FUNC_SMBUS_READ_WORD_DATA))
+		return -EIO;
+
+	ts = devm_kzalloc(&client->dev, sizeof(*ts), GFP_KERNEL);
+	if (!ts)
+		return -ENOMEM;
+
+	input_dev = devm_input_allocate_device(&client->dev);
+	if (!input_dev)
+		return -ENOMEM;
+
+	ts->client = client;
+	ts->input = input_dev;
+
+	snprintf(ts->phys, sizeof(ts->phys),
+		 "%s/input0", dev_name(&client->dev));
+
+	input_dev->name = CY8CTMG110_DRIVER_NAME " Touchscreen";
+	input_dev->phys = ts->phys;
+	input_dev->id.bustype = BUS_I2C;
+
+	input_set_capability(input_dev, EV_KEY, BTN_TOUCH);
+	input_set_abs_params(input_dev, ABS_X,
+			CY8CTMG110_X_MIN, CY8CTMG110_X_MAX, 4, 0);
+	input_set_abs_params(input_dev, ABS_Y,
+			CY8CTMG110_Y_MIN, CY8CTMG110_Y_MAX, 4, 0);
+
+	/* Request and assert reset line */
+	ts->reset_gpio = devm_gpiod_get_optional(&client->dev, NULL,
+						 GPIOD_OUT_HIGH);
+	if (IS_ERR(ts->reset_gpio)) {
+		err = PTR_ERR(ts->reset_gpio);
+		dev_err(&client->dev,
+			"Unable to request reset GPIO: %d\n", err);
+		return err;
+	}
+
+	cy8ctmg110_power(ts, true);
+	cy8ctmg110_set_sleepmode(ts, false);
+
+	err = devm_add_action_or_reset(&client->dev, cy8ctmg110_shut_off, ts);
+	if (err)
+		return err;
+
+	err = devm_request_threaded_irq(&client->dev, client->irq,
+					NULL, cy8ctmg110_irq_thread,
+					IRQF_ONESHOT, "touch_reset_key", ts);
+	if (err) {
+		dev_err(&client->dev,
+			"irq %d busy? error %d\n", client->irq, err);
+		return err;
+	}
+
+	err = input_register_device(input_dev);
+	if (err)
+		return err;
+
+	i2c_set_clientdata(client, ts);
+
+	return 0;
+}
+
+static int cy8ctmg110_suspend(struct device *dev)
+{
+	struct i2c_client *client = to_i2c_client(dev);
+	struct cy8ctmg110 *ts = i2c_get_clientdata(client);
+
+	if (!device_may_wakeup(&client->dev)) {
+		cy8ctmg110_set_sleepmode(ts, true);
+		cy8ctmg110_power(ts, false);
+	}
+
+	return 0;
+}
+
+static int cy8ctmg110_resume(struct device *dev)
+{
+	struct i2c_client *client = to_i2c_client(dev);
+	struct cy8ctmg110 *ts = i2c_get_clientdata(client);
+
+	if (!device_may_wakeup(&client->dev)) {
+		cy8ctmg110_power(ts, true);
+		cy8ctmg110_set_sleepmode(ts, false);
+	}
+
+	return 0;
+}
+
+static DEFINE_SIMPLE_DEV_PM_OPS(cy8ctmg110_pm,
+				cy8ctmg110_suspend, cy8ctmg110_resume);
+
+static const struct i2c_device_id cy8ctmg110_idtable[] = {
+	{ CY8CTMG110_DRIVER_NAME, 1 },
+	{ }
+};
+
+MODULE_DEVICE_TABLE(i2c, cy8ctmg110_idtable);
+
+static struct i2c_driver cy8ctmg110_driver = {
+	.driver		= {
+		.name	= CY8CTMG110_DRIVER_NAME,
+		.pm	= pm_sleep_ptr(&cy8ctmg110_pm),
+	},
+	.id_table	= cy8ctmg110_idtable,
+	.probe		= cy8ctmg110_probe,
+};
+
+module_i2c_driver(cy8ctmg110_driver);
+
+MODULE_AUTHOR("Samuli Konttila <samuli.konttila@aavamobile.com>");
+MODULE_DESCRIPTION("cy8ctmg110 TouchScreen Driver");
+MODULE_LICENSE("GPL v2");