[linux-2.6-block.git] / drivers / input / touchscreen / hp680_ts_input.c

#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	PHDR	0xa400012e
#define SCPDR	0xa4000136

static void do_softint(void *data);

static struct input_dev *hp680_ts_dev;
static DECLARE_WORK(work, do_softint, 0);

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)
{
	disable_irq_nosync(irq);
	schedule_delayed_work(&work, HZ / 20);

	return IRQ_HANDLED;
}

static int __init hp680_ts_init(void)
{
	hp680_ts_dev = input_allocate_device();
	if (!hp680_ts_dev)
		return -ENOMEM;

	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 = "HP Jornada touchscreen";
	hp680_ts_dev->phys = "hp680_ts/input0";

	input_register_device(hp680_ts_dev);

	if (request_irq(HP680_TS_IRQ, hp680_ts_interrupt,
			IRQF_DISABLED, 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");
Commit	Line	Data
1da177e4 LT	1	#include <linux/input.h>
	2	#include <linux/module.h>
	3	#include <linux/init.h>
	4
	5	#include <linux/interrupt.h>
	6	#include <asm/io.h>
	7	#include <asm/delay.h>
	8	#include <asm/adc.h>
	9	#include <asm/hp6xx/hp6xx.h>
	10
	11	#define MODNAME "hp680_ts_input"
	12
	13	#define HP680_TS_ABS_X_MIN 40
	14	#define HP680_TS_ABS_X_MAX 950
	15	#define HP680_TS_ABS_Y_MIN 80
	16	#define HP680_TS_ABS_Y_MAX 910
	17
1da177e4 LT	18	#define PHDR 0xa400012e
	19	#define SCPDR 0xa4000136
	20
	21	static void do_softint(void *data);
	22
eca1ed19	23	static struct input_dev *hp680_ts_dev;
1da177e4	24	static DECLARE_WORK(work, do_softint, 0);
1da177e4 LT	25
	26	static void do_softint(void *data)
	27	{
	28	int absx = 0, absy = 0;
	29	u8 scpdr;
	30	int touched = 0;
	31
	32	if (ctrl_inb(PHDR) & PHDR_TS_PEN_DOWN) {
	33	scpdr = ctrl_inb(SCPDR);
	34	scpdr \|= SCPDR_TS_SCAN_ENABLE;
	35	scpdr &= ~SCPDR_TS_SCAN_Y;
	36	ctrl_outb(scpdr, SCPDR);
	37	udelay(30);
	38
	39	absy = adc_single(ADC_CHANNEL_TS_Y);
	40
	41	scpdr = ctrl_inb(SCPDR);
	42	scpdr \|= SCPDR_TS_SCAN_Y;
	43	scpdr &= ~SCPDR_TS_SCAN_X;
	44	ctrl_outb(scpdr, SCPDR);
	45	udelay(30);
	46
	47	absx = adc_single(ADC_CHANNEL_TS_X);
	48
	49	scpdr = ctrl_inb(SCPDR);
	50	scpdr \|= SCPDR_TS_SCAN_X;
	51	scpdr &= ~SCPDR_TS_SCAN_ENABLE;
	52	ctrl_outb(scpdr, SCPDR);
	53	udelay(100);
	54	touched = ctrl_inb(PHDR) & PHDR_TS_PEN_DOWN;
	55	}
	56
	57	if (touched) {
eca1ed19 DT	58	input_report_key(hp680_ts_dev, BTN_TOUCH, 1);
	59	input_report_abs(hp680_ts_dev, ABS_X, absx);
	60	input_report_abs(hp680_ts_dev, ABS_Y, absy);
1da177e4	61	} else {
eca1ed19	62	input_report_key(hp680_ts_dev, BTN_TOUCH, 0);
1da177e4 LT	63	}
1da177e4 LT	64
eca1ed19	65	input_sync(hp680_ts_dev);
1da177e4 LT	66	enable_irq(HP680_TS_IRQ);
	67	}
	68
7d12e780	69	static irqreturn_t hp680_ts_interrupt(int irq, void *dev)
1da177e4 LT	70	{
	71	disable_irq_nosync(irq);
	72	schedule_delayed_work(&work, HZ / 20);
	73
	74	return IRQ_HANDLED;
	75	}
	76
	77	static int __init hp680_ts_init(void)
	78	{
eca1ed19 DT	79	hp680_ts_dev = input_allocate_device();
	80	if (!hp680_ts_dev)
	81	return -ENOMEM;
1da177e4	82
eca1ed19 DT	83	hp680_ts_dev->evbit[0] = BIT(EV_ABS) \| BIT(EV_KEY);
	84	hp680_ts_dev->absbit[0] = BIT(ABS_X) \| BIT(ABS_Y);
	85	hp680_ts_dev->keybit[LONG(BTN_TOUCH)] = BIT(BTN_TOUCH);
1da177e4	86
eca1ed19 DT	87	hp680_ts_dev->absmin[ABS_X] = HP680_TS_ABS_X_MIN;
	88	hp680_ts_dev->absmin[ABS_Y] = HP680_TS_ABS_Y_MIN;
	89	hp680_ts_dev->absmax[ABS_X] = HP680_TS_ABS_X_MAX;
	90	hp680_ts_dev->absmax[ABS_Y] = HP680_TS_ABS_Y_MAX;
1da177e4	91
eca1ed19 DT	92	hp680_ts_dev->name = "HP Jornada touchscreen";
eca1ed19 DT	93	hp680_ts_dev->phys = "hp680_ts/input0";
1da177e4	94
eca1ed19 DT	95	input_register_device(hp680_ts_dev);
	96
	97	if (request_irq(HP680_TS_IRQ, hp680_ts_interrupt,
dace1453	98	IRQF_DISABLED, MODNAME, 0) < 0) {
eca1ed19	99	printk(KERN_ERR "hp680_touchscreen.c: Can't allocate irq %d\n",
1da177e4	100	HP680_TS_IRQ);
eca1ed19	101	input_unregister_device(hp680_ts_dev);
1da177e4 LT	102	return -EBUSY;
	103	}
	104
	105	return 0;
	106	}
	107
	108	static void __exit hp680_ts_exit(void)
	109	{
	110	free_irq(HP680_TS_IRQ, 0);
	111	cancel_delayed_work(&work);
	112	flush_scheduled_work();
eca1ed19	113	input_unregister_device(hp680_ts_dev);
1da177e4 LT	114	}
	115
	116	module_init(hp680_ts_init);
	117	module_exit(hp680_ts_exit);
	118
	119	MODULE_AUTHOR("Andriy Skulysh, askulysh@image.kiev.ua");
	120	MODULE_DESCRIPTION("HP Jornada 680 touchscreen driver");
	121	MODULE_LICENSE("GPL");