[deliverable/linux.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	SCPCR	0xa4000116
#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, 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);

	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,
			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");
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
	18	#define SCPCR 0xa4000116
	19	#define PHDR 0xa400012e
	20	#define SCPDR 0xa4000136
	21
	22	static void do_softint(void *data);
	23
eca1ed19	24	static struct input_dev *hp680_ts_dev;
1da177e4	25	static DECLARE_WORK(work, do_softint, 0);
1da177e4 LT	26
	27	static void do_softint(void *data)
	28	{
	29	int absx = 0, absy = 0;
	30	u8 scpdr;
	31	int touched = 0;
	32
	33	if (ctrl_inb(PHDR) & PHDR_TS_PEN_DOWN) {
	34	scpdr = ctrl_inb(SCPDR);
	35	scpdr \|= SCPDR_TS_SCAN_ENABLE;
	36	scpdr &= ~SCPDR_TS_SCAN_Y;
	37	ctrl_outb(scpdr, SCPDR);
	38	udelay(30);
	39
	40	absy = adc_single(ADC_CHANNEL_TS_Y);
	41
	42	scpdr = ctrl_inb(SCPDR);
	43	scpdr \|= SCPDR_TS_SCAN_Y;
	44	scpdr &= ~SCPDR_TS_SCAN_X;
	45	ctrl_outb(scpdr, SCPDR);
	46	udelay(30);
	47
	48	absx = adc_single(ADC_CHANNEL_TS_X);
	49
	50	scpdr = ctrl_inb(SCPDR);
	51	scpdr \|= SCPDR_TS_SCAN_X;
	52	scpdr &= ~SCPDR_TS_SCAN_ENABLE;
	53	ctrl_outb(scpdr, SCPDR);
	54	udelay(100);
	55	touched = ctrl_inb(PHDR) & PHDR_TS_PEN_DOWN;
	56	}
	57
	58	if (touched) {
eca1ed19 DT	59	input_report_key(hp680_ts_dev, BTN_TOUCH, 1);
	60	input_report_abs(hp680_ts_dev, ABS_X, absx);
	61	input_report_abs(hp680_ts_dev, ABS_Y, absy);
1da177e4	62	} else {
eca1ed19	63	input_report_key(hp680_ts_dev, BTN_TOUCH, 0);
1da177e4 LT	64	}
1da177e4 LT	65
eca1ed19	66	input_sync(hp680_ts_dev);
1da177e4 LT	67	enable_irq(HP680_TS_IRQ);
	68	}
	69
	70	static irqreturn_t hp680_ts_interrupt(int irq, void dev, struct pt_regs regs)
	71	{
	72	disable_irq_nosync(irq);
	73	schedule_delayed_work(&work, HZ / 20);
	74
	75	return IRQ_HANDLED;
	76	}
	77
	78	static int __init hp680_ts_init(void)
	79	{
	80	u8 scpdr;
	81	u16 scpcr;
	82
	83	scpdr = ctrl_inb(SCPDR);
	84	scpdr \|= SCPDR_TS_SCAN_X \| SCPDR_TS_SCAN_Y;
	85	scpdr &= ~SCPDR_TS_SCAN_ENABLE;
	86	ctrl_outb(scpdr, SCPDR);
	87
	88	scpcr = ctrl_inw(SCPCR);
	89	scpcr &= ~SCPCR_TS_MASK;
	90	scpcr \|= SCPCR_TS_ENABLE;
	91	ctrl_outw(scpcr, SCPCR);
	92
eca1ed19 DT	93	hp680_ts_dev = input_allocate_device();
	94	if (!hp680_ts_dev)
	95	return -ENOMEM;
1da177e4	96
eca1ed19 DT	97	hp680_ts_dev->evbit[0] = BIT(EV_ABS) \| BIT(EV_KEY);
	98	hp680_ts_dev->absbit[0] = BIT(ABS_X) \| BIT(ABS_Y);
	99	hp680_ts_dev->keybit[LONG(BTN_TOUCH)] = BIT(BTN_TOUCH);
1da177e4	100
eca1ed19 DT	101	hp680_ts_dev->absmin[ABS_X] = HP680_TS_ABS_X_MIN;
	102	hp680_ts_dev->absmin[ABS_Y] = HP680_TS_ABS_Y_MIN;
	103	hp680_ts_dev->absmax[ABS_X] = HP680_TS_ABS_X_MAX;
	104	hp680_ts_dev->absmax[ABS_Y] = HP680_TS_ABS_Y_MAX;
1da177e4	105
eca1ed19 DT	106	hp680_ts_dev->name = "HP Jornada touchscreen";
eca1ed19 DT	107	hp680_ts_dev->phys = "hp680_ts/input0";
1da177e4	108
eca1ed19 DT	109	input_register_device(hp680_ts_dev);
	110
	111	if (request_irq(HP680_TS_IRQ, hp680_ts_interrupt,
	112	SA_INTERRUPT, MODNAME, 0) < 0) {
	113	printk(KERN_ERR "hp680_touchscreen.c: Can't allocate irq %d\n",
1da177e4	114	HP680_TS_IRQ);
eca1ed19	115	input_unregister_device(hp680_ts_dev);
1da177e4 LT	116	return -EBUSY;
	117	}
	118
	119	return 0;
	120	}
	121
	122	static void __exit hp680_ts_exit(void)
	123	{
	124	free_irq(HP680_TS_IRQ, 0);
	125	cancel_delayed_work(&work);
	126	flush_scheduled_work();
eca1ed19	127	input_unregister_device(hp680_ts_dev);
1da177e4 LT	128	}
	129
	130	module_init(hp680_ts_init);
	131	module_exit(hp680_ts_exit);
	132
	133	MODULE_AUTHOR("Andriy Skulysh, askulysh@image.kiev.ua");
	134	MODULE_DESCRIPTION("HP Jornada 680 touchscreen driver");
	135	MODULE_LICENSE("GPL");