Adding upstream version 6.1.76.upstream/6.1.76

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

1 files changed, 157 insertions, 0 deletions

diff --git a/drivers/input/touchscreen/jornada720_ts.c b/drivers/input/touchscreen/jornada720_ts.c
new file mode 100644
index 000000000..974521102
--- /dev/null
+++ b/drivers/input/touchscreen/jornada720_ts.c
@@ -0,0 +1,157 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * drivers/input/touchscreen/jornada720_ts.c
+ *
+ * Copyright (C) 2007 Kristoffer Ericson <Kristoffer.Ericson@gmail.com>
+ *
+ *  Copyright (C) 2006 Filip Zyzniewski <filip.zyzniewski@tefnet.pl>
+ *  based on HP Jornada 56x touchscreen driver by Alex Lange <chicken@handhelds.org>
+ *
+ * HP Jornada 710/720/729 Touchscreen Driver
+ */
+
+#include <linux/gpio/consumer.h>
+#include <linux/platform_device.h>
+#include <linux/input.h>
+#include <linux/interrupt.h>
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/io.h>
+
+#include <mach/jornada720.h>
+
+MODULE_AUTHOR("Kristoffer Ericson <kristoffer.ericson@gmail.com>");
+MODULE_DESCRIPTION("HP Jornada 710/720/728 touchscreen driver");
+MODULE_LICENSE("GPL v2");
+
+struct jornada_ts {
+	struct input_dev *dev;
+	struct gpio_desc *gpio;
+	int x_data[4];		/* X sample values */
+	int y_data[4];		/* Y sample values */
+};
+
+static void jornada720_ts_collect_data(struct jornada_ts *jornada_ts)
+{
+	/* 3 low word X samples */
+	jornada_ts->x_data[0] = jornada_ssp_byte(TXDUMMY);
+	jornada_ts->x_data[1] = jornada_ssp_byte(TXDUMMY);
+	jornada_ts->x_data[2] = jornada_ssp_byte(TXDUMMY);
+
+	/* 3 low word Y samples */
+	jornada_ts->y_data[0] = jornada_ssp_byte(TXDUMMY);
+	jornada_ts->y_data[1] = jornada_ssp_byte(TXDUMMY);
+	jornada_ts->y_data[2] = jornada_ssp_byte(TXDUMMY);
+
+	/* combined x samples bits */
+	jornada_ts->x_data[3] = jornada_ssp_byte(TXDUMMY);
+
+	/* combined y samples bits */
+	jornada_ts->y_data[3] = jornada_ssp_byte(TXDUMMY);
+}
+
+static int jornada720_ts_average(int coords[4])
+{
+	int coord, high_bits = coords[3];
+
+	coord  = coords[0] | ((high_bits & 0x03) << 8);
+	coord += coords[1] | ((high_bits & 0x0c) << 6);
+	coord += coords[2] | ((high_bits & 0x30) << 4);
+
+	return coord / 3;
+}
+
+static irqreturn_t jornada720_ts_interrupt(int irq, void *dev_id)
+{
+	struct platform_device *pdev = dev_id;
+	struct jornada_ts *jornada_ts = platform_get_drvdata(pdev);
+	struct input_dev *input = jornada_ts->dev;
+	int x, y;
+
+	/* If gpio is high then report pen up */
+	if (gpiod_get_value(jornada_ts->gpio)) {
+		input_report_key(input, BTN_TOUCH, 0);
+		input_sync(input);
+	} else {
+		jornada_ssp_start();
+
+		/* proper reply to request is always TXDUMMY */
+		if (jornada_ssp_inout(GETTOUCHSAMPLES) == TXDUMMY) {
+			jornada720_ts_collect_data(jornada_ts);
+
+			x = jornada720_ts_average(jornada_ts->x_data);
+			y = jornada720_ts_average(jornada_ts->y_data);
+
+			input_report_key(input, BTN_TOUCH, 1);
+			input_report_abs(input, ABS_X, x);
+			input_report_abs(input, ABS_Y, y);
+			input_sync(input);
+		}
+
+		jornada_ssp_end();
+	}
+
+	return IRQ_HANDLED;
+}
+
+static int jornada720_ts_probe(struct platform_device *pdev)
+{
+	struct jornada_ts *jornada_ts;
+	struct input_dev *input_dev;
+	int error, irq;
+
+	jornada_ts = devm_kzalloc(&pdev->dev, sizeof(*jornada_ts), GFP_KERNEL);
+	if (!jornada_ts)
+		return -ENOMEM;
+
+	input_dev = devm_input_allocate_device(&pdev->dev);
+	if (!input_dev)
+		return -ENOMEM;
+
+	platform_set_drvdata(pdev, jornada_ts);
+
+	jornada_ts->gpio = devm_gpiod_get(&pdev->dev, "penup", GPIOD_IN);
+	if (IS_ERR(jornada_ts->gpio))
+		return PTR_ERR(jornada_ts->gpio);
+
+	irq = gpiod_to_irq(jornada_ts->gpio);
+	if (irq <= 0)
+		return irq < 0 ? irq : -EINVAL;
+
+	jornada_ts->dev = input_dev;
+
+	input_dev->name = "HP Jornada 7xx Touchscreen";
+	input_dev->phys = "jornadats/input0";
+	input_dev->id.bustype = BUS_HOST;
+	input_dev->dev.parent = &pdev->dev;
+
+	input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
+	input_dev->keybit[BIT_WORD(BTN_TOUCH)] = BIT_MASK(BTN_TOUCH);
+	input_set_abs_params(input_dev, ABS_X, 270, 3900, 0, 0);
+	input_set_abs_params(input_dev, ABS_Y, 180, 3700, 0, 0);
+
+	error = devm_request_irq(&pdev->dev, irq, jornada720_ts_interrupt,
+				 IRQF_TRIGGER_RISING,
+				 "HP7XX Touchscreen driver", pdev);
+	if (error) {
+		dev_err(&pdev->dev, "HP7XX TS : Unable to acquire irq!\n");
+		return error;
+	}
+
+	error = input_register_device(jornada_ts->dev);
+	if (error)
+		return error;
+
+	return 0;
+}
+
+/* work with hotplug and coldplug */
+MODULE_ALIAS("platform:jornada_ts");
+
+static struct platform_driver jornada720_ts_driver = {
+	.probe		= jornada720_ts_probe,
+	.driver		= {
+		.name	= "jornada_ts",
+	},
+};
+module_platform_driver(jornada720_ts_driver);