Dmitry, This is the hp7xx touchscreen driver. Any feedback appreciated.
diff --git a/drivers/input/touchscreen/jornada720_ts.c
b/drivers/input/touchscreen/jornada720_ts.c
new file mode 100644
index 0000000..e45227a
--- /dev/null
+++ b/drivers/input/touchscreen/jornada720_ts.c
@@ -0,0 +1,156 @@
+/*
+ * drivers/input/touchscreen/jornada720_ts.c
+ *
+ * Copyright (C) 2007 Kristoffer Ericson <[EMAIL PROTECTED]>
+ *
+ * Copyright (C) 2006 Filip Zyzniewski <[EMAIL PROTECTED]>
+ * based on HP Jornada 56x touchscreen driver by Alex Lange <[EMAIL
PROTECTED]>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * HP Jornada 710/720/729 Touchscreen Driver
+ */
+
+#include <linux/device.h>
+#include <linux/init.h>
+#include <linux/input.h>
+#include <linux/interrupt.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+
+#include <asm/hardware.h>
+#include <asm/arch/jornada720.h>
+
+MODULE_AUTHOR("Kristoffer Ericson <[EMAIL PROTECTED]>");
+MODULE_DESCRIPTION("HP Jornada 710/720/728 touchscreen driver");
+MODULE_LICENSE("GPLv2");
+
+struct input_dev *dev;
+
+static irqreturn_t jornada720_ts_interrupt(int irq, void *dev_id)
+{
+ int X[3], Y[3], high_x, high_y, x, y;
+
+ /* If GPIO_GPIO9 is set to high */
+ if(GPLR & GPIO_GPIO(9)) {
+ /* report pen up */
+ input_report_key(dev, BTN_TOUCH, 0);
+ input_report_abs(dev, ABS_PRESSURE, 0);
+ input_sync(dev);
+
+ return IRQ_HANDLED;
+ }
+
+ /* start ssp and do a spinlock */
+ jornada_ssp_start();
+
+ /* request x & y data */
+ if(jornada_ssp_inout(GETTOUCHSAMPLES) != TXDUMMY) {
+ jornada_ssp_end();
+ return IRQ_HANDLED;
+ }
+
+ /* 3 low word X samples */
+ X[0] = jornada_ssp_byte(TXDUMMY);
+ X[1] = jornada_ssp_byte(TXDUMMY);
+ X[2] = jornada_ssp_byte(TXDUMMY);
+
+ /* 3 low word Y samples */
+ Y[0] = jornada_ssp_byte(TXDUMMY);
+ Y[1] = jornada_ssp_byte(TXDUMMY);
+ Y[2] = jornada_ssp_byte(TXDUMMY);
+
+ /* combined X samples bits */
+ high_x = jornada_ssp_byte(TXDUMMY);
+
+ /* combined Y sample bits */
+ high_y = jornada_ssp_byte(TXDUMMY);
+
+ /* end ssp communication and release spinlock */
+ jornada_ssp_end();
+
+ /* calculating actual values */
+ X[0] |= (high_x & 3) << 8;
+ X[1] |= (high_x & 0xc) << 6;
+ X[2] |= (high_x & 0x30) << 4;
+
+ Y[0] |= (high_y & 3) << 8;
+ Y[1] |= (high_y & 0xc) << 6;
+ Y[2] |= (high_y & 0x30) << 4;
+
+ /* simple averaging filter */
+ x = (X[0] + X[1] + X[2])/3;
+ y = (Y[0] + Y[1] + Y[2])/3;
+
+ /* report pen down */
+ input_report_key(dev, BTN_TOUCH, 1);
+ input_report_abs(dev, ABS_X, x);
+ input_report_abs(dev, ABS_Y, y);
+ input_report_abs(dev, ABS_PRESSURE, 1);
+ input_sync(dev);
+
+ return IRQ_HANDLED;
+}
+
+
+static int jornada720_ts_probe(struct device *_dev)
+{
+ int ret;
+
+ dev = input_allocate_device();
+ if (!dev)
+ return -ENOMEM;
+
+ dev->evbit[0] = BIT(EV_KEY) | BIT(EV_ABS);
+ dev->absbit[0] = BIT(ABS_X) | BIT(ABS_Y) | BIT(ABS_PRESSURE);
+ dev->keybit[LONG(BTN_TOUCH)] = BIT(BTN_TOUCH);
+
+ dev->absmin[ABS_X] = 270; dev->absmin[ABS_Y] = 180;
+ dev->absmax[ABS_X] = 3900; dev->absmax[ABS_Y] = 3700;
+
+ dev->name = "HP Jornada 710/720/728 Touchscreen driver";
+
+ ret = request_irq(IRQ_GPIO9,
+ jornada720_ts_interrupt,
+ IRQF_DISABLED | IRQF_TRIGGER_RISING,
+ "HP Jornada 710/720/728 Touchscreen driver", dev);
+ if (ret) {
+ printk("Unable to grab IRQ for %s: %d\n", "HP Jornada 7XX
Touchscreen driver", ret);
+ input_free_device(dev);
+ return ret;
+ }
+
+ input_register_device(dev);
+
+ return 0;
+}
+
+
+static int jornada720_ts_remove(struct device *_dev)
+{
+ free_irq(IRQ_GPIO9, dev);
+ input_unregister_device(dev);
+ return 0;
+}
+
+static struct device_driver jornada720_ts_driver = {
+ .name = "jornada_ts_driver",
+ .probe = jornada720_ts_probe,
+ .remove = jornada720_ts_remove,
+ .owner = THIS_MODULE
+};
+
+static int __init jornada720_ts_init(void)
+{
+ return driver_register(&jornada720_ts_driver);
+}
+
+static void __exit jornada720_ts_exit(void)
+{
+ driver_unregister(&jornada720_ts_driver);
+}
+
+module_init(jornada720_ts_init);
+module_exit(jornada720_ts_exit);
hp7xx-touchscreen-support.patch
Description: Binary data
