Adding upstream version 5.10.209.upstream/5.10.209upstream

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

1 files changed, 163 insertions, 0 deletions

diff --git a/drivers/input/mouse/pc110pad.c b/drivers/input/mouse/pc110pad.c
new file mode 100644
index 000000000..f75574766
--- /dev/null
+++ b/drivers/input/mouse/pc110pad.c
@@ -0,0 +1,163 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ *  Copyright (c) 2000-2001 Vojtech Pavlik
+ *
+ *  Based on the work of:
+ *	Alan Cox	Robin O'Leary
+ */
+
+/*
+ * IBM PC110 touchpad driver for Linux
+ */
+
+/*
+ */
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/errno.h>
+#include <linux/ioport.h>
+#include <linux/input.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/pci.h>
+#include <linux/delay.h>
+
+#include <asm/io.h>
+#include <asm/irq.h>
+
+MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
+MODULE_DESCRIPTION("IBM PC110 touchpad driver");
+MODULE_LICENSE("GPL");
+
+#define PC110PAD_OFF	0x30
+#define PC110PAD_ON	0x38
+
+static int pc110pad_irq = 10;
+static int pc110pad_io = 0x15e0;
+
+static struct input_dev *pc110pad_dev;
+static int pc110pad_data[3];
+static int pc110pad_count;
+
+static irqreturn_t pc110pad_interrupt(int irq, void *ptr)
+{
+	int value     = inb_p(pc110pad_io);
+	int handshake = inb_p(pc110pad_io + 2);
+
+	outb(handshake |  1, pc110pad_io + 2);
+	udelay(2);
+	outb(handshake & ~1, pc110pad_io + 2);
+	udelay(2);
+	inb_p(0x64);
+
+	pc110pad_data[pc110pad_count++] = value;
+
+	if (pc110pad_count < 3)
+		return IRQ_HANDLED;
+
+	input_report_key(pc110pad_dev, BTN_TOUCH,
+		pc110pad_data[0] & 0x01);
+	input_report_abs(pc110pad_dev, ABS_X,
+		pc110pad_data[1] | ((pc110pad_data[0] << 3) & 0x80) | ((pc110pad_data[0] << 1) & 0x100));
+	input_report_abs(pc110pad_dev, ABS_Y,
+		pc110pad_data[2] | ((pc110pad_data[0] << 4) & 0x80));
+	input_sync(pc110pad_dev);
+
+	pc110pad_count = 0;
+	return IRQ_HANDLED;
+}
+
+static void pc110pad_close(struct input_dev *dev)
+{
+	outb(PC110PAD_OFF, pc110pad_io + 2);
+}
+
+static int pc110pad_open(struct input_dev *dev)
+{
+	pc110pad_interrupt(0, NULL);
+	pc110pad_interrupt(0, NULL);
+	pc110pad_interrupt(0, NULL);
+	outb(PC110PAD_ON, pc110pad_io + 2);
+	pc110pad_count = 0;
+
+	return 0;
+}
+
+/*
+ * We try to avoid enabling the hardware if it's not
+ * there, but we don't know how to test. But we do know
+ * that the PC110 is not a PCI system. So if we find any
+ * PCI devices in the machine, we don't have a PC110.
+ */
+static int __init pc110pad_init(void)
+{
+	int err;
+
+	if (!no_pci_devices())
+		return -ENODEV;
+
+	if (!request_region(pc110pad_io, 4, "pc110pad")) {
+		printk(KERN_ERR "pc110pad: I/O area %#x-%#x in use.\n",
+				pc110pad_io, pc110pad_io + 4);
+		return -EBUSY;
+	}
+
+	outb(PC110PAD_OFF, pc110pad_io + 2);
+
+	if (request_irq(pc110pad_irq, pc110pad_interrupt, 0, "pc110pad", NULL)) {
+		printk(KERN_ERR "pc110pad: Unable to get irq %d.\n", pc110pad_irq);
+		err = -EBUSY;
+		goto err_release_region;
+	}
+
+	pc110pad_dev = input_allocate_device();
+	if (!pc110pad_dev) {
+		printk(KERN_ERR "pc110pad: Not enough memory.\n");
+		err = -ENOMEM;
+		goto err_free_irq;
+	}
+
+	pc110pad_dev->name = "IBM PC110 TouchPad";
+	pc110pad_dev->phys = "isa15e0/input0";
+	pc110pad_dev->id.bustype = BUS_ISA;
+	pc110pad_dev->id.vendor = 0x0003;
+	pc110pad_dev->id.product = 0x0001;
+	pc110pad_dev->id.version = 0x0100;
+
+	pc110pad_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
+	pc110pad_dev->absbit[0] = BIT_MASK(ABS_X) | BIT_MASK(ABS_Y);
+	pc110pad_dev->keybit[BIT_WORD(BTN_TOUCH)] = BIT_MASK(BTN_TOUCH);
+
+	input_abs_set_max(pc110pad_dev, ABS_X, 0x1ff);
+	input_abs_set_max(pc110pad_dev, ABS_Y, 0x0ff);
+
+	pc110pad_dev->open = pc110pad_open;
+	pc110pad_dev->close = pc110pad_close;
+
+	err = input_register_device(pc110pad_dev);
+	if (err)
+		goto err_free_dev;
+
+	return 0;
+
+ err_free_dev:
+	input_free_device(pc110pad_dev);
+ err_free_irq:
+	free_irq(pc110pad_irq, NULL);
+ err_release_region:
+	release_region(pc110pad_io, 4);
+
+	return err;
+}
+
+static void __exit pc110pad_exit(void)
+{
+	outb(PC110PAD_OFF, pc110pad_io + 2);
+	free_irq(pc110pad_irq, NULL);
+	input_unregister_device(pc110pad_dev);
+	release_region(pc110pad_io, 4);
+}
+
+module_init(pc110pad_init);
+module_exit(pc110pad_exit);