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From 34645060d6786dbb6c97d3e5a32981afa3c9de37 Mon Sep 17 00:00:00 2001
From: Dmitry Artamonow <mad_soft@inbox.ru>
Date: Sat, 21 Mar 2009 16:27:19 +0300
Subject: [PATCH 4/7] input: driver for touchscreen on iPaq h3xxx
This adds a driver for the touchscreen connected to the
Atmel microcontroller on the iPAQ h3xxx series.
Based on a driver from handhelds.org 2.6.21 kernel, written
by Alessandro GARDICH.
Signed-off-by: Alessandro GARDICH <gremlin@gremlin.it>
Signed-off-by: Dmitry Artamonow <mad_soft@inbox.ru>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
---
drivers/input/touchscreen/Kconfig | 8 ++
drivers/input/touchscreen/Makefile | 1 +
drivers/input/touchscreen/ipaq-micro-ts.c | 138 ++++++++++++++++++++++++++++++
3 files changed, 147 insertions(+)
create mode 100644 drivers/input/touchscreen/ipaq-micro-ts.c
diff --git a/drivers/input/touchscreen/Kconfig b/drivers/input/touchscreen/Kconfig
index f9a5fd89bc02..1f10c7c9f3df 100644
--- a/drivers/input/touchscreen/Kconfig
+++ b/drivers/input/touchscreen/Kconfig
@@ -436,6 +436,14 @@ config TOUCHSCREEN_HP7XX
To compile this driver as a module, choose M here: the
module will be called jornada720_ts.
+config TOUCHSCREEN_IPAQ_MICRO
+ tristate "HP iPAQ Atmel Micro ASIC touchscreen"
+ depends on MFD_IPAQ_MICRO
+ help
+ This enables support for the touchscreen attached to
+ the Atmel Micro peripheral controller on iPAQ h3100/h3600/h3700
+
+
config TOUCHSCREEN_HTCPEN
tristate "HTC Shift X9500 touchscreen"
depends on ISA
diff --git a/drivers/input/touchscreen/Makefile b/drivers/input/touchscreen/Makefile
index 6bfbeab67c9f..3cb2dc18e8d4 100644
--- a/drivers/input/touchscreen/Makefile
+++ b/drivers/input/touchscreen/Makefile
@@ -43,6 +43,7 @@ obj-$(CONFIG_TOUCHSCREEN_MTOUCH) += mtouch.o
obj-$(CONFIG_TOUCHSCREEN_MK712) += mk712.o
obj-$(CONFIG_TOUCHSCREEN_HP600) += hp680_ts_input.o
obj-$(CONFIG_TOUCHSCREEN_HP7XX) += jornada720_ts.o
+obj-$(CONFIG_TOUCHSCREEN_IPAQ_MICRO) += ipaq-micro-ts.o
obj-$(CONFIG_TOUCHSCREEN_HTCPEN) += htcpen.o
obj-$(CONFIG_TOUCHSCREEN_USB_COMPOSITE) += usbtouchscreen.o
obj-$(CONFIG_TOUCHSCREEN_PCAP) += pcap_ts.o
diff --git a/drivers/input/touchscreen/ipaq-micro-ts.c b/drivers/input/touchscreen/ipaq-micro-ts.c
new file mode 100644
index 000000000000..5ea012a51de5
--- /dev/null
+++ b/drivers/input/touchscreen/ipaq-micro-ts.c
@@ -0,0 +1,138 @@
+/*
+ * 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.
+ *
+ * h3600 atmel micro companion support, touchscreen subdevice
+ * Author : Alessandro Gardich <gremlin@gremlin.it>
+ * Author : Linus Walleij <linus.walleij@linaro.org>
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/pm.h>
+#include <linux/delay.h>
+#include <linux/device.h>
+#include <linux/input.h>
+#include <linux/platform_device.h>
+#include <linux/slab.h>
+#include <linux/mfd/ipaq-micro.h>
+
+struct ts_sample {
+ unsigned short x;
+ unsigned short y;
+};
+
+struct touchscreen_data {
+ struct input_dev *input;
+};
+
+static struct ipaq_micro *p_micro;
+struct touchscreen_data *ts;
+
+static void micro_ts_receive(int len, unsigned char *data)
+{
+ if (len == 4) {
+ input_report_abs(ts->input, ABS_X, (data[2]<<8)+data[3]);
+ input_report_abs(ts->input, ABS_Y, (data[0]<<8)+data[1]);
+ input_report_abs(ts->input, ABS_PRESSURE, 1);
+ input_report_key(ts->input, BTN_TOUCH, 0);
+ }
+ if (len == 0) {
+ input_report_abs(ts->input, ABS_X, 0);
+ input_report_abs(ts->input, ABS_Y, 0);
+ input_report_abs(ts->input, ABS_PRESSURE, 0);
+ input_report_key(ts->input, BTN_TOUCH, 1);
+ }
+ input_sync(ts->input);
+}
+
+
+static int micro_ts_probe(struct platform_device *pdev)
+{
+ int ret;
+
+ ts = devm_kzalloc(&pdev->dev, sizeof(*ts), GFP_KERNEL);
+ if (!ts)
+ return -ENOMEM;
+
+ p_micro = dev_get_drvdata(pdev->dev.parent);
+
+ platform_set_drvdata(pdev, ts);
+ /* dev->driver_data = ts; */
+
+ ts->input = input_allocate_device();
+
+ ts->input->evbit[0] = BIT(EV_ABS);
+ ts->input->absbit[0] = BIT(ABS_X) | BIT(ABS_Y) | BIT(ABS_PRESSURE);
+ input_set_abs_params(ts->input, ABS_X, 0, 1023, 0, 0);
+ input_set_abs_params(ts->input, ABS_Y, 0, 1023, 0, 0);
+ input_set_abs_params(ts->input, ABS_PRESSURE, 0x0, 0x1, 0, 0);
+
+ ts->input->name = "ipaq micro ts";
+ /* ts->input->private = ts; */
+
+ ret = input_register_device(ts->input);
+ if (ret) {
+ dev_err(&pdev->dev, "error registering touch input\n");
+ return ret;
+ }
+
+ /*--- callback ---*/
+ spin_lock(&p_micro->lock);
+ p_micro->h_ts = micro_ts_receive;
+ spin_unlock(&p_micro->lock);
+
+ dev_info(&pdev->dev, "iPAQ micro touchscreen\n");
+ return 0;
+}
+
+static int micro_ts_remove(struct platform_device *pdev)
+{
+ struct touchscreen_data *ts;
+
+ ts = platform_get_drvdata(pdev);
+
+ spin_lock(&p_micro->lock);
+ p_micro->h_ts = NULL;
+ spin_unlock(&p_micro->lock);
+ input_unregister_device(ts->input);
+
+ return 0;
+}
+
+static int micro_ts_suspend(struct device *dev)
+{
+ spin_lock(&p_micro->lock);
+ p_micro->h_ts = NULL;
+ spin_unlock(&p_micro->lock);
+ return 0;
+}
+
+static int micro_ts_resume(struct device *dev)
+{
+ spin_lock(&p_micro->lock);
+ p_micro->h_ts = micro_ts_receive;
+ spin_unlock(&p_micro->lock);
+ return 0;
+}
+
+static const struct dev_pm_ops micro_ts_dev_pm_ops = {
+ SET_SYSTEM_SLEEP_PM_OPS(micro_ts_suspend, micro_ts_resume)
+};
+
+struct platform_driver micro_ts_device_driver = {
+ .driver = {
+ .name = "ipaq-micro-ts",
+ .pm = µ_ts_dev_pm_ops,
+ },
+ .probe = micro_ts_probe,
+ .remove = micro_ts_remove,
+};
+module_platform_driver(micro_ts_device_driver);
+
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("driver for iPAQ Atmel micro touchscreen");
+MODULE_ALIAS("platform:ipaq-micro-ts");
--
1.8.3.1
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