[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 <mach/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(struct work_struct *work);

static struct input_dev *hp680_ts_dev;
static DECLARE_DELAYED_WORK(work, do_softint);

static void do_softint(struct work_struct *work)
{
	int absx = 0, absy = 0;
	u8 scpdr;
	int touched = 0;

	if (__raw_readb(PHDR) & PHDR_TS_PEN_DOWN) {
		scpdr = __raw_readb(SCPDR);
		scpdr |= SCPDR_TS_SCAN_ENABLE;
		scpdr &= ~SCPDR_TS_SCAN_Y;
		__raw_writeb(scpdr, SCPDR);
		udelay(30);

		absy = adc_single(ADC_CHANNEL_TS_Y);

		scpdr = __raw_readb(SCPDR);
		scpdr |= SCPDR_TS_SCAN_Y;
		scpdr &= ~SCPDR_TS_SCAN_X;
		__raw_writeb(scpdr, SCPDR);
		udelay(30);

		absx = adc_single(ADC_CHANNEL_TS_X);

		scpdr = __raw_readb(SCPDR);
		scpdr |= SCPDR_TS_SCAN_X;
		scpdr &= ~SCPDR_TS_SCAN_ENABLE;
		__raw_writeb(scpdr, SCPDR);
		udelay(100);
		touched = __raw_readb(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)
{
	int err;

	hp680_ts_dev = input_allocate_device();
	if (!hp680_ts_dev)
		return -ENOMEM;

	hp680_ts_dev->evbit[0] = BIT_MASK(EV_ABS) | BIT_MASK(EV_KEY);
	hp680_ts_dev->keybit[BIT_WORD(BTN_TOUCH)] = BIT_MASK(BTN_TOUCH);

	input_set_abs_params(hp680_ts_dev, ABS_X,
		HP680_TS_ABS_X_MIN, HP680_TS_ABS_X_MAX, 0, 0);
	input_set_abs_params(hp680_ts_dev, ABS_Y,
		HP680_TS_ABS_Y_MIN, HP680_TS_ABS_Y_MAX, 0, 0);

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

	if (request_irq(HP680_TS_IRQ, hp680_ts_interrupt,
			0, MODNAME, NULL) < 0) {
		printk(KERN_ERR "hp680_touchscreen.c: Can't allocate irq %d\n",
		       HP680_TS_IRQ);
		err = -EBUSY;
		goto fail1;
	}

	err = input_register_device(hp680_ts_dev);
	if (err)
		goto fail2;

	return 0;

 fail2:	free_irq(HP680_TS_IRQ, NULL);
	cancel_delayed_work_sync(&work);
 fail1:	input_free_device(hp680_ts_dev);
	return err;
}

static void __exit hp680_ts_exit(void)
{
	free_irq(HP680_TS_IRQ, NULL);
	cancel_delayed_work_sync(&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>
1da177e4 LT	4	#include <linux/interrupt.h>
	5	#include <asm/io.h>
	6	#include <asm/delay.h>
	7	#include <asm/adc.h>
7639a454	8	#include <mach/hp6xx.h>
1da177e4 LT	9
	10	#define MODNAME "hp680_ts_input"
	11
	12	#define HP680_TS_ABS_X_MIN 40
	13	#define HP680_TS_ABS_X_MAX 950
	14	#define HP680_TS_ABS_Y_MIN 80
	15	#define HP680_TS_ABS_Y_MAX 910
	16
1da177e4 LT	17	#define PHDR 0xa400012e
	18	#define SCPDR 0xa4000136
	19
049fa57c	20	static void do_softint(struct work_struct *work);
1da177e4	21
eca1ed19	22	static struct input_dev *hp680_ts_dev;
049fa57c	23	static DECLARE_DELAYED_WORK(work, do_softint);
1da177e4	24
049fa57c	25	static void do_softint(struct work_struct *work)
1da177e4 LT	26	{
	27	int absx = 0, absy = 0;
	28	u8 scpdr;
	29	int touched = 0;
	30
e28abafb PM	31	if (__raw_readb(PHDR) & PHDR_TS_PEN_DOWN) {
e28abafb PM	32	scpdr = __raw_readb(SCPDR);
1da177e4 LT	33	scpdr \|= SCPDR_TS_SCAN_ENABLE;
1da177e4 LT	34	scpdr &= ~SCPDR_TS_SCAN_Y;
e28abafb	35	__raw_writeb(scpdr, SCPDR);
1da177e4 LT	36	udelay(30);
	37
	38	absy = adc_single(ADC_CHANNEL_TS_Y);
	39
e28abafb	40	scpdr = __raw_readb(SCPDR);
1da177e4 LT	41	scpdr \|= SCPDR_TS_SCAN_Y;
1da177e4 LT	42	scpdr &= ~SCPDR_TS_SCAN_X;
e28abafb	43	__raw_writeb(scpdr, SCPDR);
1da177e4 LT	44	udelay(30);
	45
	46	absx = adc_single(ADC_CHANNEL_TS_X);
	47
e28abafb	48	scpdr = __raw_readb(SCPDR);
1da177e4 LT	49	scpdr \|= SCPDR_TS_SCAN_X;
1da177e4 LT	50	scpdr &= ~SCPDR_TS_SCAN_ENABLE;
e28abafb	51	__raw_writeb(scpdr, SCPDR);
1da177e4	52	udelay(100);
e28abafb	53	touched = __raw_readb(PHDR) & PHDR_TS_PEN_DOWN;
1da177e4 LT	54	}
	55
	56	if (touched) {
eca1ed19 DT	57	input_report_key(hp680_ts_dev, BTN_TOUCH, 1);
	58	input_report_abs(hp680_ts_dev, ABS_X, absx);
	59	input_report_abs(hp680_ts_dev, ABS_Y, absy);
1da177e4	60	} else {
eca1ed19	61	input_report_key(hp680_ts_dev, BTN_TOUCH, 0);
1da177e4 LT	62	}
1da177e4 LT	63
eca1ed19	64	input_sync(hp680_ts_dev);
1da177e4 LT	65	enable_irq(HP680_TS_IRQ);
	66	}
	67
7d12e780	68	static irqreturn_t hp680_ts_interrupt(int irq, void *dev)
1da177e4 LT	69	{
	70	disable_irq_nosync(irq);
	71	schedule_delayed_work(&work, HZ / 20);
	72
	73	return IRQ_HANDLED;
	74	}
	75
	76	static int __init hp680_ts_init(void)
	77	{
52c1f570 DT	78	int err;
52c1f570 DT	79
eca1ed19 DT	80	hp680_ts_dev = input_allocate_device();
	81	if (!hp680_ts_dev)
	82	return -ENOMEM;
1da177e4	83
7b19ada2 JS	84	hp680_ts_dev->evbit[0] = BIT_MASK(EV_ABS) \| BIT_MASK(EV_KEY);
7b19ada2 JS	85	hp680_ts_dev->keybit[BIT_WORD(BTN_TOUCH)] = BIT_MASK(BTN_TOUCH);
1da177e4	86
52c1f570 DT	87	input_set_abs_params(hp680_ts_dev, ABS_X,
	88	HP680_TS_ABS_X_MIN, HP680_TS_ABS_X_MAX, 0, 0);
	89	input_set_abs_params(hp680_ts_dev, ABS_Y,
	90	HP680_TS_ABS_Y_MIN, HP680_TS_ABS_Y_MAX, 0, 0);
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	95	if (request_irq(HP680_TS_IRQ, hp680_ts_interrupt,
b51425be	96	0, MODNAME, NULL) < 0) {
eca1ed19	97	printk(KERN_ERR "hp680_touchscreen.c: Can't allocate irq %d\n",
1da177e4	98	HP680_TS_IRQ);
52c1f570 DT	99	err = -EBUSY;
52c1f570 DT	100	goto fail1;
1da177e4 LT	101	}
1da177e4 LT	102
52c1f570 DT	103	err = input_register_device(hp680_ts_dev);
	104	if (err)
	105	goto fail2;
	106
1da177e4	107	return 0;
52c1f570 DT	108
52c1f570 DT	109	fail2: free_irq(HP680_TS_IRQ, NULL);
790d5c8d	110	cancel_delayed_work_sync(&work);
52c1f570 DT	111	fail1: input_free_device(hp680_ts_dev);
52c1f570 DT	112	return err;
1da177e4 LT	113	}
	114
	115	static void __exit hp680_ts_exit(void)
	116	{
52c1f570	117	free_irq(HP680_TS_IRQ, NULL);
790d5c8d	118	cancel_delayed_work_sync(&work);
eca1ed19	119	input_unregister_device(hp680_ts_dev);
1da177e4 LT	120	}
	121
	122	module_init(hp680_ts_init);
	123	module_exit(hp680_ts_exit);
	124
	125	MODULE_AUTHOR("Andriy Skulysh, askulysh@image.kiev.ua");
	126	MODULE_DESCRIPTION("HP Jornada 680 touchscreen driver");
	127	MODULE_LICENSE("GPL");