162 lines
3.7 KiB
C
162 lines
3.7 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
|
|
/*
|
|
*
|
|
* h3600 atmel micro companion support, touchscreen subdevice
|
|
* Author : Alessandro Gardich <gremlin@gremlin.it>
|
|
* Author : Dmitry Artamonow <mad_soft@inbox.ru>
|
|
* Author : Linus Walleij <linus.walleij@linaro.org>
|
|
*/
|
|
|
|
#include <asm/byteorder.h>
|
|
#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 touchscreen_data {
|
|
struct input_dev *input;
|
|
struct ipaq_micro *micro;
|
|
};
|
|
|
|
static void micro_ts_receive(void *data, int len, unsigned char *msg)
|
|
{
|
|
struct touchscreen_data *ts = data;
|
|
|
|
if (len == 4) {
|
|
input_report_abs(ts->input, ABS_X,
|
|
be16_to_cpup((__be16 *) &msg[2]));
|
|
input_report_abs(ts->input, ABS_Y,
|
|
be16_to_cpup((__be16 *) &msg[0]));
|
|
input_report_key(ts->input, BTN_TOUCH, 1);
|
|
input_sync(ts->input);
|
|
} else if (len == 0) {
|
|
input_report_abs(ts->input, ABS_X, 0);
|
|
input_report_abs(ts->input, ABS_Y, 0);
|
|
input_report_key(ts->input, BTN_TOUCH, 0);
|
|
input_sync(ts->input);
|
|
}
|
|
}
|
|
|
|
static void micro_ts_toggle_receive(struct touchscreen_data *ts, bool enable)
|
|
{
|
|
struct ipaq_micro *micro = ts->micro;
|
|
|
|
spin_lock_irq(µ->lock);
|
|
|
|
if (enable) {
|
|
micro->ts = micro_ts_receive;
|
|
micro->ts_data = ts;
|
|
} else {
|
|
micro->ts = NULL;
|
|
micro->ts_data = NULL;
|
|
}
|
|
|
|
spin_unlock_irq(&ts->micro->lock);
|
|
}
|
|
|
|
static int micro_ts_open(struct input_dev *input)
|
|
{
|
|
struct touchscreen_data *ts = input_get_drvdata(input);
|
|
|
|
micro_ts_toggle_receive(ts, true);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void micro_ts_close(struct input_dev *input)
|
|
{
|
|
struct touchscreen_data *ts = input_get_drvdata(input);
|
|
|
|
micro_ts_toggle_receive(ts, false);
|
|
}
|
|
|
|
static int micro_ts_probe(struct platform_device *pdev)
|
|
{
|
|
struct ipaq_micro *micro = dev_get_drvdata(pdev->dev.parent);
|
|
struct touchscreen_data *ts;
|
|
int error;
|
|
|
|
ts = devm_kzalloc(&pdev->dev, sizeof(*ts), GFP_KERNEL);
|
|
if (!ts)
|
|
return -ENOMEM;
|
|
|
|
ts->micro = micro;
|
|
|
|
ts->input = devm_input_allocate_device(&pdev->dev);
|
|
if (!ts->input) {
|
|
dev_err(&pdev->dev, "failed to allocate input device\n");
|
|
return -ENOMEM;
|
|
}
|
|
|
|
ts->input->name = "ipaq micro ts";
|
|
ts->input->open = micro_ts_open;
|
|
ts->input->close = micro_ts_close;
|
|
|
|
input_set_drvdata(ts->input, ts);
|
|
|
|
input_set_capability(ts->input, EV_KEY, BTN_TOUCH);
|
|
input_set_capability(ts->input, EV_ABS, ABS_X);
|
|
input_set_capability(ts->input, EV_ABS, ABS_Y);
|
|
input_set_abs_params(ts->input, ABS_X, 0, 1023, 0, 0);
|
|
input_set_abs_params(ts->input, ABS_Y, 0, 1023, 0, 0);
|
|
|
|
error = input_register_device(ts->input);
|
|
if (error) {
|
|
dev_err(&pdev->dev, "error registering touch input\n");
|
|
return error;
|
|
}
|
|
|
|
platform_set_drvdata(pdev, ts);
|
|
|
|
dev_info(&pdev->dev, "iPAQ micro touchscreen\n");
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int __maybe_unused micro_ts_suspend(struct device *dev)
|
|
{
|
|
struct touchscreen_data *ts = dev_get_drvdata(dev);
|
|
|
|
micro_ts_toggle_receive(ts, false);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int __maybe_unused micro_ts_resume(struct device *dev)
|
|
{
|
|
struct touchscreen_data *ts = dev_get_drvdata(dev);
|
|
struct input_dev *input = ts->input;
|
|
|
|
mutex_lock(&input->mutex);
|
|
|
|
if (input_device_enabled(input))
|
|
micro_ts_toggle_receive(ts, true);
|
|
|
|
mutex_unlock(&input->mutex);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct dev_pm_ops micro_ts_dev_pm_ops = {
|
|
SET_SYSTEM_SLEEP_PM_OPS(micro_ts_suspend, micro_ts_resume)
|
|
};
|
|
|
|
static struct platform_driver micro_ts_device_driver = {
|
|
.driver = {
|
|
.name = "ipaq-micro-ts",
|
|
.pm = µ_ts_dev_pm_ops,
|
|
},
|
|
.probe = micro_ts_probe,
|
|
};
|
|
module_platform_driver(micro_ts_device_driver);
|
|
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_DESCRIPTION("driver for iPAQ Atmel micro touchscreen");
|
|
MODULE_ALIAS("platform:ipaq-micro-ts");
|