Adding upstream version 6.6.15.upstream/6.6.15

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

1 files changed, 215 insertions, 0 deletions

diff --git a/drivers/input/touchscreen/mk712.c b/drivers/input/touchscreen/mk712.c
new file mode 100644
index 0000000000..753d9cc1de
--- /dev/null
+++ b/drivers/input/touchscreen/mk712.c
@@ -0,0 +1,215 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * ICS MK712 touchscreen controller driver
+ *
+ * Copyright (c) 1999-2002 Transmeta Corporation
+ * Copyright (c) 2005 Rick Koch <n1gp@hotmail.com>
+ * Copyright (c) 2005 Vojtech Pavlik <vojtech@suse.cz>
+ */
+
+
+/*
+ * This driver supports the ICS MicroClock MK712 TouchScreen controller,
+ * found in Gateway AOL Connected Touchpad computers.
+ *
+ * Documentation for ICS MK712 can be found at:
+ *	https://www.idt.com/general-parts/mk712-touch-screen-controller
+ */
+
+/*
+ * 1999-12-18: original version, Daniel Quinlan
+ * 1999-12-19: added anti-jitter code, report pen-up events, fixed mk712_poll
+ *             to use queue_empty, Nathan Laredo
+ * 1999-12-20: improved random point rejection, Nathan Laredo
+ * 2000-01-05: checked in new anti-jitter code, changed mouse protocol, fixed
+ *             queue code, added module options, other fixes, Daniel Quinlan
+ * 2002-03-15: Clean up for kernel merge <alan@redhat.com>
+ *             Fixed multi open race, fixed memory checks, fixed resource
+ *             allocation, fixed close/powerdown bug, switched to new init
+ * 2005-01-18: Ported to 2.6 from 2.4.28, Rick Koch
+ * 2005-02-05: Rewritten for the input layer, Vojtech Pavlik
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/errno.h>
+#include <linux/delay.h>
+#include <linux/ioport.h>
+#include <linux/interrupt.h>
+#include <linux/input.h>
+#include <asm/io.h>
+
+MODULE_AUTHOR("Daniel Quinlan <quinlan@pathname.com>, Vojtech Pavlik <vojtech@suse.cz>");
+MODULE_DESCRIPTION("ICS MicroClock MK712 TouchScreen driver");
+MODULE_LICENSE("GPL");
+
+static unsigned int mk712_io = 0x260;	/* Also 0x200, 0x208, 0x300 */
+module_param_hw_named(io, mk712_io, uint, ioport, 0);
+MODULE_PARM_DESC(io, "I/O base address of MK712 touchscreen controller");
+
+static unsigned int mk712_irq = 10;	/* Also 12, 14, 15 */
+module_param_hw_named(irq, mk712_irq, uint, irq, 0);
+MODULE_PARM_DESC(irq, "IRQ of MK712 touchscreen controller");
+
+/* eight 8-bit registers */
+#define MK712_STATUS		0
+#define MK712_X			2
+#define MK712_Y			4
+#define MK712_CONTROL		6
+#define MK712_RATE		7
+
+/* status */
+#define	MK712_STATUS_TOUCH			0x10
+#define	MK712_CONVERSION_COMPLETE		0x80
+
+/* control */
+#define MK712_ENABLE_INT			0x01
+#define MK712_INT_ON_CONVERSION_COMPLETE	0x02
+#define MK712_INT_ON_CHANGE_IN_TOUCH_STATUS	0x04
+#define MK712_ENABLE_PERIODIC_CONVERSIONS	0x10
+#define MK712_READ_ONE_POINT			0x20
+#define MK712_POWERUP				0x40
+
+static struct input_dev *mk712_dev;
+static DEFINE_SPINLOCK(mk712_lock);
+
+static irqreturn_t mk712_interrupt(int irq, void *dev_id)
+{
+	unsigned char status;
+	static int debounce = 1;
+	static unsigned short last_x;
+	static unsigned short last_y;
+
+	spin_lock(&mk712_lock);
+
+	status = inb(mk712_io + MK712_STATUS);
+
+	if (~status & MK712_CONVERSION_COMPLETE) {
+		debounce = 1;
+		goto end;
+	}
+
+	if (~status & MK712_STATUS_TOUCH) {
+		debounce = 1;
+		input_report_key(mk712_dev, BTN_TOUCH, 0);
+		goto end;
+	}
+
+	if (debounce) {
+		debounce = 0;
+		goto end;
+	}
+
+	input_report_key(mk712_dev, BTN_TOUCH, 1);
+	input_report_abs(mk712_dev, ABS_X, last_x);
+	input_report_abs(mk712_dev, ABS_Y, last_y);
+
+ end:
+	last_x = inw(mk712_io + MK712_X) & 0x0fff;
+	last_y = inw(mk712_io + MK712_Y) & 0x0fff;
+	input_sync(mk712_dev);
+	spin_unlock(&mk712_lock);
+	return IRQ_HANDLED;
+}
+
+static int mk712_open(struct input_dev *dev)
+{
+	unsigned long flags;
+
+	spin_lock_irqsave(&mk712_lock, flags);
+
+	outb(0, mk712_io + MK712_CONTROL); /* Reset */
+
+	outb(MK712_ENABLE_INT | MK712_INT_ON_CONVERSION_COMPLETE |
+		MK712_INT_ON_CHANGE_IN_TOUCH_STATUS |
+		MK712_ENABLE_PERIODIC_CONVERSIONS |
+		MK712_POWERUP, mk712_io + MK712_CONTROL);
+
+	outb(10, mk712_io + MK712_RATE); /* 187 points per second */
+
+	spin_unlock_irqrestore(&mk712_lock, flags);
+
+	return 0;
+}
+
+static void mk712_close(struct input_dev *dev)
+{
+	unsigned long flags;
+
+	spin_lock_irqsave(&mk712_lock, flags);
+
+	outb(0, mk712_io + MK712_CONTROL);
+
+	spin_unlock_irqrestore(&mk712_lock, flags);
+}
+
+static int __init mk712_init(void)
+{
+	int err;
+
+	if (!request_region(mk712_io, 8, "mk712")) {
+		printk(KERN_WARNING "mk712: unable to get IO region\n");
+		return -ENODEV;
+	}
+
+	outb(0, mk712_io + MK712_CONTROL);
+
+	if ((inw(mk712_io + MK712_X) & 0xf000) ||	/* Sanity check */
+	    (inw(mk712_io + MK712_Y) & 0xf000) ||
+	    (inw(mk712_io + MK712_STATUS) & 0xf333)) {
+		printk(KERN_WARNING "mk712: device not present\n");
+		err = -ENODEV;
+		goto fail1;
+	}
+
+	mk712_dev = input_allocate_device();
+	if (!mk712_dev) {
+		printk(KERN_ERR "mk712: not enough memory\n");
+		err = -ENOMEM;
+		goto fail1;
+	}
+
+	mk712_dev->name = "ICS MicroClock MK712 TouchScreen";
+	mk712_dev->phys = "isa0260/input0";
+	mk712_dev->id.bustype = BUS_ISA;
+	mk712_dev->id.vendor  = 0x0005;
+	mk712_dev->id.product = 0x0001;
+	mk712_dev->id.version = 0x0100;
+
+	mk712_dev->open    = mk712_open;
+	mk712_dev->close   = mk712_close;
+
+	mk712_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
+	mk712_dev->keybit[BIT_WORD(BTN_TOUCH)] = BIT_MASK(BTN_TOUCH);
+	input_set_abs_params(mk712_dev, ABS_X, 0, 0xfff, 88, 0);
+	input_set_abs_params(mk712_dev, ABS_Y, 0, 0xfff, 88, 0);
+
+	if (request_irq(mk712_irq, mk712_interrupt, 0, "mk712", mk712_dev)) {
+		printk(KERN_WARNING "mk712: unable to get IRQ\n");
+		err = -EBUSY;
+		goto fail1;
+	}
+
+	err = input_register_device(mk712_dev);
+	if (err)
+		goto fail2;
+
+	return 0;
+
+ fail2:	free_irq(mk712_irq, mk712_dev);
+ fail1:	input_free_device(mk712_dev);
+	release_region(mk712_io, 8);
+	return err;
+}
+
+static void __exit mk712_exit(void)
+{
+	input_unregister_device(mk712_dev);
+	free_irq(mk712_irq, mk712_dev);
+	release_region(mk712_io, 8);
+}
+
+module_init(mk712_init);
+module_exit(mk712_exit);