+++ /dev/null
-/*
- * input/touchscreen/tsc2102_ts.c
- *
- * Touchscreen input device driver for the TSC 2102 chip.
- *
- * Copyright (c) 2006 Andrzej Zaborowski <balrog@zabor.org>
- *
- * This package is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This package is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this package; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
- */
-
-#include <linux/errno.h>
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/input.h>
-#include <linux/init.h>
-#include <linux/platform_device.h>
-
-#include <linux/spi/tsc2102.h>
-
-struct input_dev *dev;
-
-static void tsc2102_touch(int touching)
-{
- if (!touching) {
- input_report_abs(dev, ABS_X, 0);
- input_report_abs(dev, ABS_Y, 0);
- input_report_abs(dev, ABS_PRESSURE, 0);
- input_sync(dev);
- }
-
- input_report_key(dev, BTN_TOUCH, touching);
-}
-
-static void tsc2102_coords(int x, int y, int z1, int z2)
-{
- int p;
-
- /* Calculate the touch resistance a la equation #1 */
- if (z1 != 0)
- p = x * (z2 - z1) / (z1 << 4);
- else
- p = 1;
-
- input_report_abs(dev, ABS_X, x);
- input_report_abs(dev, ABS_Y, y);
- input_report_abs(dev, ABS_PRESSURE, p);
- input_sync(dev);
-}
-
-static int tsc2102_ts_probe(struct platform_device *pdev)
-{
- int status;
-
- dev = input_allocate_device();
- if (!dev)
- return -ENOMEM;
-
- status = tsc2102_touch_cb(tsc2102_touch);
- if (status) {
- input_free_device(dev);
- return status;
- }
-
- status = tsc2102_coords_cb(tsc2102_coords);
- if (status) {
- tsc2102_touch_cb(0);
- input_free_device(dev);
- return status;
- }
-
- dev->name = "TSC2102 Touchscreen";
- dev->cdev.dev = &pdev->dev;
- dev->evbit[0] = BIT(EV_KEY) | BIT(EV_ABS);
- dev->keybit[LONG(BTN_TOUCH)] |= BIT(BTN_TOUCH);
- dev->absbit[0] = BIT(ABS_X) | BIT(ABS_Y) | BIT(ABS_PRESSURE);
- dev->phys = "tsc2102/input0";
- dev->id.bustype = BUS_HOST;
- dev->id.vendor = 0x0001;
- dev->id.product = 0x2102;
- dev->id.version = 0x0001;
-
- status = input_register_device(dev);
- if (status) {
- tsc2102_coords_cb(0);
- tsc2102_touch_cb(0);
- input_free_device(dev);
- return status;
- }
-
- printk(KERN_INFO "TSC2102 touchscreen driver initialized\n");
- return 0;
-}
-
-static int tsc2102_ts_remove(struct platform_device *pdev)
-{
- tsc2102_touch_cb(0);
- tsc2102_coords_cb(0);
- input_unregister_device(dev);
- input_free_device(dev);
- return 0;
-}
-
-#ifdef CONFIG_PM
-static int
-tsc2102_ts_suspend(struct platform_device *pdev, pm_message_t state)
-{
- return 0;
-}
-
-static int tsc2102_ts_resume(struct platform_device *pdev)
-{
- return 0;
-}
-#else
-#define tsc2102_ts_suspend NULL
-#define tsc2102_ts_resume NULL
-#endif
-
-static struct platform_driver tsc2102_ts_driver = {
- .probe = tsc2102_ts_probe,
- .remove = tsc2102_ts_remove,
- .suspend = tsc2102_ts_suspend,
- .resume = tsc2102_ts_resume,
- .driver = {
- .name = "tsc2102-ts",
- .owner = THIS_MODULE,
- },
-};
-
-static int __init tsc2102_ts_init(void)
-{
- int ret;
-
- ret = platform_driver_register(&tsc2102_ts_driver);
- if (ret)
- return -ENODEV;
-
- return 0;
-}
-
-static void __exit tsc2102_ts_exit(void)
-{
- platform_driver_unregister(&tsc2102_ts_driver);
-}
-
-module_init(tsc2102_ts_init);
-module_exit(tsc2102_ts_exit);
-
-MODULE_AUTHOR("Andrzej Zaborowski");
-MODULE_DESCRIPTION("Touchscreen input driver for TI TSC2102.");
-MODULE_LICENSE("GPL");