-/*
- * input/touchscreen/omap/omap_ts.c
- *
- * touchscreen input device driver for various TI OMAP boards
- * Copyright (c) 2002 MontaVista Software Inc.
- * Copyright (c) 2004 Texas Instruments, Inc.
- * Cleanup and modularization 2004 by Dirk Behme <dirk.behme@de.bosch.com>
- *
- * Assembled using driver code copyright the companies above.
- *
- * This program 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 program 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 program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- * History:
- * 12/12/2004 Srinath Modified and intergrated code for H2 and H3
- *
- */
-
-#include <linux/errno.h>
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/slab.h>
-#include <linux/input.h>
-#include <linux/init.h>
-#include <linux/wait.h>
-#include <linux/interrupt.h>
-#include <linux/suspend.h>
-#include <linux/platform_device.h>
-
-#include <asm/mach-types.h>
-
-//#define DEBUG
-
-#include "omap_ts.h"
-
-#define OMAP_TS_NAME "omap_ts"
-
-static struct ts_device *__initdata ts_devs[] = {
-#if defined(CONFIG_MACH_OMAP_H2) || defined(CONFIG_MACH_OMAP_H3)
- &hx_ts,
-#endif
-};
-
-static struct omap_ts_t ts_omap;
-
-static int omap_ts_read(void)
-{
- u16 data[4] = { 0, 0, 0, 0 };
-
- ts_omap.dev->read(data);
-
- input_report_abs(ts_omap.inputdevice, ABS_X, data[0]);
- input_report_abs(ts_omap.inputdevice, ABS_Y, data[1]);
- input_report_abs(ts_omap.inputdevice, ABS_PRESSURE, data[2]);
- input_sync(ts_omap.inputdevice);
-
- DEBUG_TS("omap_ts_read: read x=%d,y=%d,p=%d\n", data[0], data[1],
- data[2]);
-
- return 0;
-}
-
-static void omap_ts_timer(unsigned long data)
-{
- unsigned long flags;
-
- spin_lock_irqsave(&ts_omap.lock, flags);
-
- if (!ts_omap.dev->penup()) {
- if (!ts_omap.touched) {
- DEBUG_TS("omap_ts_timer: pen down\n");
- input_report_key(ts_omap.inputdevice, BTN_TOUCH, 1);
- }
- ts_omap.touched = 1;
- omap_ts_read();
- ts_omap.ts_timer.expires = jiffies + HZ / 100;
- add_timer(&(ts_omap.ts_timer));
- } else {
- if (ts_omap.touched) {
- DEBUG_TS("omap_ts_timer: pen up\n");
- ts_omap.touched = 0;
- input_report_abs(ts_omap.inputdevice, ABS_X, 0);
- input_report_abs(ts_omap.inputdevice, ABS_Y, 0);
- input_report_abs(ts_omap.inputdevice, ABS_PRESSURE,
- 0);
- input_sync(ts_omap.inputdevice);
- input_report_key(ts_omap.inputdevice, BTN_TOUCH, 0);
- }
- if (!ts_omap.irq_enabled) {
- ts_omap.irq_enabled = 1;
- enable_irq(ts_omap.irq);
- }
- }
-
- spin_unlock_irqrestore(&ts_omap.lock, flags);
-}
-
-static irqreturn_t omap_ts_handler(int irq, void *dev_id)
-{
- spin_lock(&ts_omap.lock);
-
- if (ts_omap.irq_enabled) {
- ts_omap.irq_enabled = 0;
- disable_irq(irq);
- }
- // restart acquire
- mod_timer(&ts_omap.ts_timer, jiffies + HZ / 100);
-
- spin_unlock(&ts_omap.lock);
-
- return IRQ_HANDLED;
-}
-
-static int __init omap_ts_probe(struct platform_device *pdev)
-{
- int i;
- int status = -ENODEV;
-
- memset(&ts_omap, 0, sizeof(ts_omap));
-
- ts_omap.inputdevice = input_allocate_device();
- if (!ts_omap.inputdevice) {
- return -ENOMEM;
- }
-
- spin_lock_init(&ts_omap.lock);
-
- for (i = 0; i < ARRAY_SIZE(ts_devs); i++) {
- if (!ts_devs[i] || !ts_devs[i]->probe)
- continue;
- status = ts_devs[i]->probe(&ts_omap);
- if (status == 0) {
- ts_omap.dev = ts_devs[i];
- break;
- }
- }
-
- if (status != 0) {
- input_free_device(ts_omap.inputdevice);
- return status;
- }
-
- // Init acquisition timer function
- init_timer(&ts_omap.ts_timer);
- ts_omap.ts_timer.function = omap_ts_timer;
-
- /* request irq */
- if (ts_omap.irq != -1) {
- if (request_irq(ts_omap.irq, omap_ts_handler,
- IRQF_SAMPLE_RANDOM | ts_omap.irq_type,
- OMAP_TS_NAME, &ts_omap)) {
- printk(KERN_ERR
- "omap_ts.c: Could not allocate touchscreen IRQ!\n");
- ts_omap.irq = -1;
- ts_omap.dev->remove();
- input_free_device(ts_omap.inputdevice);
- return -EINVAL;
- }
- ts_omap.irq_enabled = 1;
- } else {
- printk(KERN_ERR "omap_ts.c: No touchscreen IRQ assigned!\n");
- ts_omap.dev->remove();
- input_free_device(ts_omap.inputdevice);
- return -EINVAL;
- }
-
- ts_omap.inputdevice->name = OMAP_TS_NAME;
- ts_omap.inputdevice->dev = &pdev->dev;
- ts_omap.inputdevice->evbit[0] = BIT(EV_KEY) | BIT(EV_ABS);
- ts_omap.inputdevice->keybit[BIT_WORD(BTN_TOUCH)] |= BIT(BTN_TOUCH);
- ts_omap.inputdevice->absbit[0] =
- BIT(ABS_X) | BIT(ABS_Y) | BIT(ABS_PRESSURE);
- input_register_device(ts_omap.inputdevice);
-
- ts_omap.dev->enable();
-
- printk("OMAP touchscreen driver initialized\n");
-
- return 0;
-}
-
-static int omap_ts_remove(struct platform_device *pdev)
-{
- ts_omap.dev->disable();
- input_unregister_device(ts_omap.inputdevice);
- if (ts_omap.irq != -1)
- free_irq(ts_omap.irq, &ts_omap);
-
- ts_omap.dev->remove();
-
- return 0;
-}
-
-static int omap_ts_suspend(struct platform_device *pdev, pm_message_t state)
-{
- ts_omap.dev->disable();
- return 0;
-}
-
-static int omap_ts_resume(struct platform_device *pdev)
-{
- ts_omap.dev->enable();
- return 0;
-}
-
-static void omap_ts_device_release(struct device *dev)
-{
- /* Nothing */
-}
-static struct platform_driver omap_ts_driver = {
- .probe = omap_ts_probe,
- .remove = omap_ts_remove,
- .suspend = omap_ts_suspend,
- .resume = omap_ts_resume,
- .driver = {
- .name = OMAP_TS_NAME,
- },
-};
-
-static struct platform_device omap_ts_device = {
- .name = OMAP_TS_NAME,
- .id = -1,
- .dev = {
- .release = omap_ts_device_release,
- },
-};
-
-static int __init omap_ts_init(void)
-{
- int ret;
-
- if (machine_is_omap_osk() || machine_is_omap_innovator())
- return -ENODEV;
-
- ret = platform_device_register(&omap_ts_device);
- if (ret != 0)
- return -ENODEV;
-
- ret = platform_driver_register(&omap_ts_driver);
- if (ret != 0) {
- platform_device_unregister(&omap_ts_device);
- return -ENODEV;
- }
-
- return 0;
-}
-
-static void __exit omap_ts_exit(void)
-{
- platform_driver_unregister(&omap_ts_driver);
- platform_device_unregister(&omap_ts_device);
-}
-
-module_init(omap_ts_init);
-module_exit(omap_ts_exit);
-
-MODULE_LICENSE("GPL");