#include <linux/input.h>#include <linux/module.h>#include <linux/init.h>#include <linux/interrupt.h>#include <asm/io.h>#include <asm/delay.h>#include <asm/adc.h>#include <asm/hp6xx/hp6xx.h>#define MODNAME "hp680_ts_input"#define HP680_TS_ABS_X_MIN	40#define HP680_TS_ABS_X_MAX	950#define HP680_TS_ABS_Y_MIN	80#define HP680_TS_ABS_Y_MAX	910#define	SCPCR	0xa4000116#define	PHDR	0xa400012e#define SCPDR	0xa4000136static void do_softint(void *data);static struct input_dev hp680_ts_dev;static DECLARE_WORK(work, do_softint, 0);static char *hp680_ts_name = "HP Jornada touchscreen";static char *hp680_ts_phys = "input0";static void do_softint(void *data){	int absx = 0, absy = 0;	u8 scpdr;	int touched = 0;	if (ctrl_inb(PHDR) & PHDR_TS_PEN_DOWN) {		scpdr = ctrl_inb(SCPDR);		scpdr |= SCPDR_TS_SCAN_ENABLE;		scpdr &= ~SCPDR_TS_SCAN_Y;		ctrl_outb(scpdr, SCPDR);		udelay(30);		absy = adc_single(ADC_CHANNEL_TS_Y);		scpdr = ctrl_inb(SCPDR);		scpdr |= SCPDR_TS_SCAN_Y;		scpdr &= ~SCPDR_TS_SCAN_X;		ctrl_outb(scpdr, SCPDR);		udelay(30);		absx = adc_single(ADC_CHANNEL_TS_X);		scpdr = ctrl_inb(SCPDR);		scpdr |= SCPDR_TS_SCAN_X;		scpdr &= ~SCPDR_TS_SCAN_ENABLE;		ctrl_outb(scpdr, SCPDR);		udelay(100);		touched = ctrl_inb(PHDR) & PHDR_TS_PEN_DOWN;	}	if (touched) {		input_report_key(&hp680_ts_dev, BTN_TOUCH, 1);		input_report_abs(&hp680_ts_dev, ABS_X, absx);		input_report_abs(&hp680_ts_dev, ABS_Y, absy);	} else {		input_report_key(&hp680_ts_dev, BTN_TOUCH, 0);	}	input_sync(&hp680_ts_dev);	enable_irq(HP680_TS_IRQ);}static irqreturn_t hp680_ts_interrupt(int irq, void *dev, struct pt_regs *regs){	disable_irq_nosync(irq);	schedule_delayed_work(&work, HZ / 20);	return IRQ_HANDLED;}static int __init hp680_ts_init(void){	u8 scpdr;	u16 scpcr;	scpdr = ctrl_inb(SCPDR);	scpdr |= SCPDR_TS_SCAN_X | SCPDR_TS_SCAN_Y;	scpdr &= ~SCPDR_TS_SCAN_ENABLE;	ctrl_outb(scpdr, SCPDR);	scpcr = ctrl_inw(SCPCR);	scpcr &= ~SCPCR_TS_MASK;	scpcr |= SCPCR_TS_ENABLE;	ctrl_outw(scpcr, SCPCR);	memset(&hp680_ts_dev, 0, sizeof(hp680_ts_dev));	init_input_dev(&hp680_ts_dev);	hp680_ts_dev.evbit[0] = BIT(EV_ABS) | BIT(EV_KEY);	hp680_ts_dev.absbit[0] = BIT(ABS_X) | BIT(ABS_Y);	hp680_ts_dev.keybit[LONG(BTN_TOUCH)] = BIT(BTN_TOUCH);	hp680_ts_dev.absmin[ABS_X] = HP680_TS_ABS_X_MIN;	hp680_ts_dev.absmin[ABS_Y] = HP680_TS_ABS_Y_MIN;	hp680_ts_dev.absmax[ABS_X] = HP680_TS_ABS_X_MAX;	hp680_ts_dev.absmax[ABS_Y] = HP680_TS_ABS_Y_MAX;	hp680_ts_dev.name = hp680_ts_name;	hp680_ts_dev.phys = hp680_ts_phys;	input_register_device(&hp680_ts_dev);	if (request_irq	    (HP680_TS_IRQ, hp680_ts_interrupt, SA_INTERRUPT, MODNAME, 0) < 0) {		printk(KERN_ERR "hp680_touchscreen.c : Can't allocate irq %d\n",		       HP680_TS_IRQ);		input_unregister_device(&hp680_ts_dev);		return -EBUSY;	}	return 0;}static void __exit hp680_ts_exit(void){	free_irq(HP680_TS_IRQ, 0);	cancel_delayed_work(&work);	flush_scheduled_work();	input_unregister_device(&hp680_ts_dev);}module_init(hp680_ts_init);module_exit(hp680_ts_exit);MODULE_AUTHOR("Andriy Skulysh, askulysh@image.kiev.ua");MODULE_DESCRIPTION("HP Jornada 680 touchscreen driver");MODULE_LICENSE("GPL");