[PATCH] Add support for HTC Shift Touchscreen
From: Pau Oliva Fora
Date: Sat May 17 2008 - 08:45:01 EST
From: Pau Oliva Fora <pau@xxxxxxxxxx>
The patch below adds support for HTC Shift UMPC touchscreen.
Signed-off-by: Pau Oliva Fora <pau@xxxxxxxxxx>
---
Patch against linux-2.6.25.4, should apply clean on other versions too.
diff -uprN linux-2.6.25.4/drivers/input/touchscreen/htcpen.c linux/drivers/input/touchscreen/htcpen.c
--- linux-2.6.25.4/drivers/input/touchscreen/htcpen.c 1970-01-01 01:00:00.000000000 +0100
+++ linux/drivers/input/touchscreen/htcpen.c 2008-05-17 13:48:57.000000000 +0200
@@ -0,0 +1,148 @@
+/*
+ * HTC Shift touchscreen driver
+ *
+ * Copyright (C) 2008 Pau Oliva Fora <pof@xxxxxxxxxx>
+ *
+ * Thanks to:
+ * Heikki Linnakangas - Penmount LPC touchscreen driver
+ * Wacom / Ping Cheng - Help on linuxwacom-devel
+ * Esteve Espuna - Ideas, tips, moral support :)
+ *
+ * Changelog:
+ * 29980517 v0.5 - code cleanup
+ * 29980517 v0.4 - initialization works (thanks esteve!)
+ * 20080514 v0.3 - works best with TouchKit egalax xorg driver
+ * 20080511 v0.2 - little hacks to make it more usable
+ * 20080510 v0.1 - works with evtouch driver
+ * 20080428 first non-working attempt
+ */
+
+/*
+ * 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.
+ */
+
+#include <linux/errno.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/input.h>
+#include <linux/interrupt.h>
+#include <linux/io.h>
+#include <linux/init.h>
+#include <linux/irq.h>
+
+#define DRIVER_VERSION "v0.5"
+#define DRIVER_DESC "HTC Shift touchscreen driver"
+
+MODULE_AUTHOR("Pau Oliva Fora <pau@xxxxxxxxxx>");
+MODULE_DESCRIPTION(DRIVER_DESC);
+MODULE_LICENSE("GPL");
+
+#define HTCPEN_PORT0 0x068
+#define HTCPEN_PORT1 0x06c
+#define HTCPEN_PORT2 0x0250
+#define HTCPEN_PORT3 0x0251
+#define HTCPEN_IRQ 3
+
+static int inverse_y;
+module_param(inverse_y, bool, 0644);
+MODULE_PARM_DESC(inverse_y, "If set Y axe is inversed.");
+
+struct input_dev *htcpen_dev;
+
+static void poll_htcpen(void)
+{
+
+ unsigned short x, y, xy;
+ unsigned short touch;
+
+ /* 0=press ; 1=release */
+ outb_p(0xb, HTCPEN_PORT2);
+ touch = inb_p(HTCPEN_PORT3);
+ if (touch)
+ touch = 0;
+ else
+ touch = 1;
+
+ input_report_key(htcpen_dev, BTN_TOUCH, touch);
+
+ /* only update x/y when screen is being touched */
+ if (touch) {
+ outb_p(3, HTCPEN_PORT2);
+ x = inb_p(HTCPEN_PORT3);
+
+ outb_p(5, HTCPEN_PORT2);
+ y = inb_p(HTCPEN_PORT3);
+
+ outb_p(0xc, HTCPEN_PORT2);
+ xy = inb_p(HTCPEN_PORT3);
+
+ x = 8*255-((x*8)+((xy>>4)&0xf));
+ y = (y*8)+(xy&0xf);
+ if (inverse_y)
+ y = 8*255-y;
+
+ input_report_abs(htcpen_dev, ABS_X, x);
+ input_report_abs(htcpen_dev, ABS_Y, y);
+ }
+
+ input_sync(htcpen_dev);
+
+ inb_p(HTCPEN_PORT0);
+}
+
+static irqreturn_t htcpen_interrupt(int irq, void *handle)
+{
+ poll_htcpen();
+ return IRQ_HANDLED;
+}
+
+
+static int __init htcpen_init(void)
+{
+
+ printk(KERN_INFO "htcpen: module inserted\n");
+
+ inb_p(HTCPEN_PORT0);
+
+ htcpen_dev = input_allocate_device();
+ if (!htcpen_dev) {
+ printk(KERN_ERR "htcpen: can't allocate device\n");
+ return -ENOMEM;
+ }
+
+ if (request_irq(HTCPEN_IRQ, htcpen_interrupt, 0, "htcpen", NULL)) {
+ printk(KERN_ERR "htcpen: irq busy\n");
+ return -EBUSY;
+ }
+
+ htcpen_dev->name = "HTC Pen TouchScreen";
+ htcpen_dev->id.bustype = BUS_ISA;
+ htcpen_dev->id.vendor = 0;
+ htcpen_dev->id.product = 0;
+ htcpen_dev->id.version = 0;
+
+ input_set_abs_params(htcpen_dev, ABS_X, 0, 255*8, 0, 0);
+ input_set_abs_params(htcpen_dev, ABS_Y, 0, 255*8, 0, 0);
+
+ htcpen_dev->evbit[0] = BIT_MASK(EV_ABS) | BIT_MASK(EV_KEY);
+ htcpen_dev->absbit[0] = BIT_MASK(ABS_X) | BIT_MASK(ABS_Y);
+ htcpen_dev->keybit[BIT_WORD(BTN_TOUCH)] = BIT_MASK(BTN_TOUCH);
+
+ input_register_device(htcpen_dev);
+
+ outb_p(0xa2, HTCPEN_PORT1);
+
+ return 0;
+}
+
+static void __exit htcpen_exit(void)
+{
+ input_unregister_device(htcpen_dev);
+ free_irq(HTCPEN_IRQ, NULL);
+ printk(KERN_INFO "htcpen: module removed\n");
+}
+
+module_init(htcpen_init);
+module_exit(htcpen_exit);
diff -uprN linux-2.6.25.4/drivers/input/touchscreen/Kconfig linux/drivers/input/touchscreen/Kconfig
--- linux-2.6.25.4/drivers/input/touchscreen/Kconfig 2008-05-15 17:00:12.000000000 +0200
+++ linux/drivers/input/touchscreen/Kconfig 2008-05-17 03:23:14.000000000 +0200
@@ -134,6 +134,17 @@ config TOUCHSCREEN_HP7XX
To compile this driver as a module, choose M here: the
module will be called jornada720_ts.
+config TOUCHSCREEN_HTCPEN
+ tristate "HTC Shift X9500 touchscreen"
+ help
+ Say Y here if you have an HTC Shift UMPC also known as HTC X9500
+ Clio / Shangrila and want to support the built-in touchscreen.
+
+ If unsure, say N.
+
+ To compile this driver as a module, choose M here: the
+ module will be called htcpen.
+
config TOUCHSCREEN_PENMOUNT
tristate "Penmount serial touchscreen"
select SERIO
diff -uprN linux-2.6.25.4/drivers/input/touchscreen/Makefile linux/drivers/input/touchscreen/Makefile
--- linux-2.6.25.4/drivers/input/touchscreen/Makefile 2008-05-15 17:00:12.000000000 +0200
+++ linux/drivers/input/touchscreen/Makefile 2008-05-17 03:10:12.000000000 +0200
@@ -14,6 +14,7 @@ obj-$(CONFIG_TOUCHSCREEN_MTOUCH) += mtou
obj-$(CONFIG_TOUCHSCREEN_MK712) += mk712.o
obj-$(CONFIG_TOUCHSCREEN_HP600) += hp680_ts_input.o
obj-$(CONFIG_TOUCHSCREEN_HP7XX) += jornada720_ts.o
+obj-$(CONFIG_TOUCHSCREEN_HTCPEN) += htcpen.o
obj-$(CONFIG_TOUCHSCREEN_USB_COMPOSITE) += usbtouchscreen.o
obj-$(CONFIG_TOUCHSCREEN_PENMOUNT) += penmount.o
obj-$(CONFIG_TOUCHSCREEN_TOUCHRIGHT) += touchright.o
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/