2 * input/touchscreen/omap/omap_ts.c
4 * touchscreen input device driver for various TI OMAP boards
5 * Copyright (c) 2002 MontaVista Software Inc.
6 * Copyright (c) 2004 Texas Instruments, Inc.
7 * Cleanup and modularization 2004 by Dirk Behme <dirk.behme@de.bosch.com>
9 * Assembled using driver code copyright the companies above.
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License as published by
13 * the Free Software Foundation; either version 2 of the License, or
14 * (at your option) any later version.
16 * This program is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 * GNU General Public License for more details.
21 * You should have received a copy of the GNU General Public License
22 * along with this program; if not, write to the Free Software
23 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
25 * 12/12/2004 Srinath Modified and intergrated code for H2 and H3
29 #include <linux/errno.h>
30 #include <linux/kernel.h>
31 #include <linux/module.h>
32 #include <linux/slab.h>
33 #include <linux/input.h>
34 #include <linux/init.h>
35 #include <linux/wait.h>
36 #include <linux/interrupt.h>
37 #include <linux/suspend.h>
38 #include <linux/device.h>
40 #include <asm/mach-types.h>
46 #define OMAP_TS_NAME "omap_ts"
48 static struct ts_device *__initdata ts_devs[] = {
49 #if defined(CONFIG_MACH_OMAP_H2) || defined(CONFIG_MACH_OMAP_H3)
52 #ifdef CONFIG_MACH_OMAP_OSK
55 #if defined(CONFIG_MACH_OMAP_INNOVATOR) && defined(CONFIG_ARCH_OMAP1510)
60 static struct omap_ts_t ts_omap;
62 static int omap_ts_read(void)
64 u16 data[4] = { 0, 0, 0, 0 };
66 ts_omap.dev->read(data);
68 input_report_abs(&(ts_omap.inputdevice), ABS_X, data[0]);
69 input_report_abs(&(ts_omap.inputdevice), ABS_Y, data[1]);
70 input_report_abs(&(ts_omap.inputdevice), ABS_PRESSURE, data[2]);
71 input_sync(&(ts_omap.inputdevice));
73 DEBUG_TS("omap_ts_read: read x=%d,y=%d,p=%d\n", data[0], data[1],
79 static void omap_ts_timer(unsigned long data)
83 spin_lock_irqsave(&ts_omap.lock, flags);
85 if (!ts_omap.dev->penup()) {
86 if (!ts_omap.touched) {
87 DEBUG_TS("omap_ts_timer: pen down\n");
88 input_report_key(&(ts_omap.inputdevice), BTN_TOUCH, 1);
92 ts_omap.ts_timer.expires = jiffies + HZ / 100;
93 add_timer(&(ts_omap.ts_timer));
95 if (ts_omap.touched) {
96 DEBUG_TS("omap_ts_timer: pen up\n");
98 input_report_abs(&(ts_omap.inputdevice), ABS_X, 0);
99 input_report_abs(&(ts_omap.inputdevice), ABS_Y, 0);
100 input_report_abs(&(ts_omap.inputdevice), ABS_PRESSURE,
102 input_sync(&(ts_omap.inputdevice));
103 input_report_key(&(ts_omap.inputdevice), BTN_TOUCH, 0);
105 if (!ts_omap.irq_enabled) {
106 ts_omap.irq_enabled = 1;
107 enable_irq(ts_omap.irq);
111 spin_unlock_irqrestore(&ts_omap.lock, flags);
114 static irqreturn_t omap_ts_handler(int irq, void *dev_id, struct pt_regs *regs)
116 spin_lock(&ts_omap.lock);
118 if (ts_omap.irq_enabled) {
119 ts_omap.irq_enabled = 0;
123 ts_omap.ts_timer.expires = jiffies + HZ / 100;
124 add_timer(&(ts_omap.ts_timer));
126 spin_unlock(&ts_omap.lock);
131 static int __init omap_ts_probe(struct device *dev)
134 int status = -ENODEV;
136 memset(&ts_omap, 0, sizeof(ts_omap));
137 spin_lock_init(&ts_omap.lock);
139 for (i = 0; i < ARRAY_SIZE(ts_devs); i++) {
140 if (!ts_devs[i] || !ts_devs[i]->probe)
142 status = ts_devs[i]->probe(&ts_omap);
144 ts_omap.dev = ts_devs[i];
152 // Init acquisition timer function
153 init_timer(&ts_omap.ts_timer);
154 ts_omap.ts_timer.function = omap_ts_timer;
157 if (ts_omap.irq != -1) {
158 if (request_irq(ts_omap.irq, omap_ts_handler, 0,
159 OMAP_TS_NAME, &ts_omap)) {
161 "omap_ts.c: Could not allocate touchscreen IRQ!\n");
165 ts_omap.irq_enabled = 1;
167 printk(KERN_ERR "omap_ts.c: No touchscreen IRQ assigned!\n");
171 init_input_dev(&(ts_omap.inputdevice));
172 ts_omap.inputdevice.name = OMAP_TS_NAME;
173 ts_omap.inputdevice.evbit[0] = BIT(EV_KEY) | BIT(EV_ABS);
174 ts_omap.inputdevice.keybit[LONG(BTN_TOUCH)] |= BIT(BTN_TOUCH);
175 ts_omap.inputdevice.absbit[0] =
176 BIT(ABS_X) | BIT(ABS_Y) | BIT(ABS_PRESSURE);
177 input_register_device(&(ts_omap.inputdevice));
179 ts_omap.dev->enable();
181 printk("OMAP touchscreen driver initialized\n");
186 static int __exit omap_ts_remove(struct device *dev)
188 ts_omap.dev->disable();
189 input_unregister_device(&ts_omap.inputdevice);
190 if (ts_omap.irq != -1)
191 free_irq(ts_omap.irq, &ts_omap);
193 ts_omap.dev->remove();
198 static int omap_ts_suspend(struct device *dev, pm_message_t mesg, u32 level)
200 if (level != SUSPEND_POWER_DOWN) {
204 ts_omap.dev->disable();
208 static int omap_ts_resume(struct device *dev, u32 level)
210 if (level != RESUME_POWER_ON) {
214 ts_omap.dev->enable();
218 static void omap_ts_device_release(struct device *dev)
223 static struct device_driver omap_ts_driver = {
224 .name = OMAP_TS_NAME,
225 .bus = &platform_bus_type,
226 .probe = omap_ts_probe,
227 .remove = __exit_p(omap_ts_remove),
228 .suspend = omap_ts_suspend,
229 .resume = omap_ts_resume,
232 static struct platform_device omap_ts_device = {
233 .name = OMAP_TS_NAME,
236 .release = omap_ts_device_release,
240 static int __init omap_ts_init(void)
244 ret = platform_device_register(&omap_ts_device);
248 ret = driver_register(&omap_ts_driver);
250 platform_device_unregister(&omap_ts_device);
257 static void __exit omap_ts_exit(void)
259 driver_unregister(&omap_ts_driver);
260 platform_device_unregister(&omap_ts_device);
263 module_init(omap_ts_init);
264 module_exit(omap_ts_exit);
266 MODULE_LICENSE("GPL");