[mirror_ubuntu-zesty-kernel.git] / drivers / input / touchscreen / h3600_ts_input.c

/*
 * $Id: h3600_ts_input.c,v 1.4 2002/01/23 06:39:37 jsimmons Exp $
 *
 *  Copyright (c) 2001 "Crazy" James Simmons jsimmons@transvirtual.com
 *
 *  Sponsored by Transvirtual Technology.
 *
 *  Derived from the code in h3600_ts.[ch] by Charles Flynn
 */

/*
 * Driver for the h3600 Touch Screen and other Atmel controlled devices.
 */

/*
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 *
 * Should you need to contact me, the author, you can do so by
 * e-mail - mail your message to <jsimmons@transvirtual.com>.
 */

#include <linux/errno.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/input.h>
#include <linux/serio.h>
#include <linux/init.h>
#include <linux/delay.h>

/* SA1100 serial defines */
#include <asm/arch/hardware.h>
#include <asm/arch/irqs.h>

#define DRIVER_DESC	"H3600 touchscreen driver"

MODULE_AUTHOR("James Simmons <jsimmons@transvirtual.com>");
MODULE_DESCRIPTION(DRIVER_DESC);
MODULE_LICENSE("GPL");

/*
 * Definitions & global arrays.
 */

/* The start and end of frame characters SOF and EOF */
#define CHAR_SOF                0x02
#define CHAR_EOF                0x03
#define FRAME_OVERHEAD          3       /* CHAR_SOF,CHAR_EOF,LENGTH = 3 */

/*
        Atmel events and response IDs contained in frame.
        Programmer has no control over these numbers.
        TODO there are holes - specifically  1,7,0x0a
*/
#define VERSION_ID              0       /* Get Version (request/respose) */
#define KEYBD_ID                2       /* Keyboard (event) */
#define TOUCHS_ID               3       /* Touch Screen (event)*/
#define EEPROM_READ_ID          4       /* (request/response) */
#define EEPROM_WRITE_ID         5       /* (request/response) */
#define THERMAL_ID              6       /* (request/response) */
#define NOTIFY_LED_ID           8       /* (request/response) */
#define BATTERY_ID              9       /* (request/response) */
#define SPI_READ_ID             0x0b    /* ( request/response) */
#define SPI_WRITE_ID            0x0c    /* ( request/response) */
#define FLITE_ID                0x0d    /* backlight ( request/response) */
#define STX_ID                  0xa1    /* extension pack status (req/resp) */

#define MAX_ID                  14

#define H3600_MAX_LENGTH 16
#define H3600_KEY 0xf

#define H3600_SCANCODE_RECORD	1	 /* 1 -> record button */
#define H3600_SCANCODE_CALENDAR 2	 /* 2 -> calendar */
#define H3600_SCANCODE_CONTACTS 3	 /* 3 -> contact */
#define H3600_SCANCODE_Q	4	 /* 4 -> Q button */
#define	H3600_SCANCODE_START	5	 /* 5 -> start menu */
#define	H3600_SCANCODE_UP	6	 /* 6 -> up */
#define H3600_SCANCODE_RIGHT	7	 /* 7 -> right */
#define H3600_SCANCODE_LEFT	8	 /* 8 -> left */
#define H3600_SCANCODE_DOWN	9	 /* 9 -> down */

/*
 * Per-touchscreen data.
 */
struct h3600_dev {
	struct input_dev *dev;
	struct serio *serio;
	unsigned char event;	/* event ID from packet */
	unsigned char chksum;
	unsigned char len;
	unsigned char idx;
	unsigned char buf[H3600_MAX_LENGTH];
	char phys[32];
};

static irqreturn_t action_button_handler(int irq, void *dev_id)
{
	int down = (GPLR & GPIO_BITSY_ACTION_BUTTON) ? 0 : 1;
	struct input_dev *dev = (struct input_dev *) dev_id;

	input_report_key(dev, KEY_ENTER, down);
	input_sync(dev);

	return IRQ_HANDLED;
}

static irqreturn_t npower_button_handler(int irq, void *dev_id)
{
	int down = (GPLR & GPIO_BITSY_NPOWER_BUTTON) ? 0 : 1;
	struct input_dev *dev = (struct input_dev *) dev_id;

	/*
	 * This interrupt is only called when we release the key. So we have
	 * to fake a key press.
	 */
	input_report_key(dev, KEY_SUSPEND, 1);
	input_report_key(dev, KEY_SUSPEND, down);
	input_sync(dev);

	return IRQ_HANDLED;
}

#ifdef CONFIG_PM

static int flite_brightness = 25;

enum flite_pwr {
	FLITE_PWR_OFF = 0,
	FLITE_PWR_ON = 1
};

/*
 * h3600_flite_power: enables or disables power to frontlight, using last bright */
unsigned int h3600_flite_power(struct input_dev *dev, enum flite_pwr pwr)
{
	unsigned char brightness = (pwr == FLITE_PWR_OFF) ? 0 : flite_brightness;
	struct h3600_dev *ts = dev->private;

	/* Must be in this order */
	ts->serio->write(ts->serio, 1);
	ts->serio->write(ts->serio, pwr);
	ts->serio->write(ts->serio, brightness);
	return 0;
}

#endif

/*
 * This function translates the native event packets to linux input event
 * packets. Some packets coming from serial are not touchscreen related. In
 * this case we send them off to be processed elsewhere.
 */
static void h3600ts_process_packet(struct h3600_dev *ts)
{
	struct input_dev *dev = ts->dev;
	static int touched = 0;
	int key, down = 0;

	switch (ts->event) {
		/*
		   Buttons - returned as a single byte
			7 6 5 4 3 2 1 0
			S x x x N N N N

		   S       switch state ( 0=pressed 1=released)
		   x       Unused.
		   NNNN    switch number 0-15

		   Note: This is true for non interrupt generated key events.
		*/
		case KEYBD_ID:
			down = (ts->buf[0] & 0x80) ? 0 : 1;

			switch (ts->buf[0] & 0x7f) {
				case H3600_SCANCODE_RECORD:
					key = KEY_RECORD;
					break;
				case H3600_SCANCODE_CALENDAR:
					key = KEY_PROG1;
                                        break;
				case H3600_SCANCODE_CONTACTS:
					key = KEY_PROG2;
					break;
				case H3600_SCANCODE_Q:
					key = KEY_Q;
					break;
				case H3600_SCANCODE_START:
					key = KEY_PROG3;
					break;
				case H3600_SCANCODE_UP:
					key = KEY_UP;
					break;
				case H3600_SCANCODE_RIGHT:
					key = KEY_RIGHT;
					break;
				case H3600_SCANCODE_LEFT:
					key = KEY_LEFT;
					break;
				case H3600_SCANCODE_DOWN:
					key = KEY_DOWN;
					break;
				default:
					key = 0;
			}
			if (key)
				input_report_key(dev, key, down);
			break;
		/*
		 * Native touchscreen event data is formatted as shown below:-
		 *
		 *      +-------+-------+-------+-------+
		 *      | Xmsb  | Xlsb  | Ymsb  | Ylsb  |
		 *      +-------+-------+-------+-------+
		 *       byte 0    1       2       3
		 */
		case TOUCHS_ID:
			if (!touched) {
				input_report_key(dev, BTN_TOUCH, 1);
				touched = 1;
			}

			if (ts->len) {
				unsigned short x, y;

				x = ts->buf[0]; x <<= 8; x += ts->buf[1];
				y = ts->buf[2]; y <<= 8; y += ts->buf[3];

				input_report_abs(dev, ABS_X, x);
				input_report_abs(dev, ABS_Y, y);
			} else {
				input_report_key(dev, BTN_TOUCH, 0);
				touched = 0;
			}
			break;
		default:
			/* Send a non input event elsewhere */
			break;
	}

	input_sync(dev);
}

/*
 * h3600ts_event() handles events from the input module.
 */
static int h3600ts_event(struct input_dev *dev, unsigned int type,
			 unsigned int code, int value)
{
#if 0
	struct h3600_dev *ts = dev->private;

	switch (type) {
		case EV_LED: {
		//	ts->serio->write(ts->serio, SOME_CMD);
			return 0;
		}
	}
	return -1;
#endif
	return 0;
}

/*
        Frame format
  byte    1       2               3              len + 4
        +-------+---------------+---------------+--=------------+
        |SOF    |id     |len    | len bytes     | Chksum        |
        +-------+---------------+---------------+--=------------+
  bit   0     7  8    11 12   15 16

        +-------+---------------+-------+
        |SOF    |id     |0      |Chksum | - Note Chksum does not include SOF
        +-------+---------------+-------+
  bit   0     7  8    11 12   15 16

*/

static int state;

/* decode States  */
#define STATE_SOF       0       /* start of FRAME */
#define STATE_ID        1       /* state where we decode the ID & len */
#define STATE_DATA      2       /* state where we decode data */
#define STATE_EOF       3       /* state where we decode checksum or EOF */

static irqreturn_t h3600ts_interrupt(struct serio *serio, unsigned char data,
                                     unsigned int flags)
{
	struct h3600_dev *ts = serio_get_drvdata(serio);

	/*
	 * We have a new frame coming in.
	 */
	switch (state) {
		case STATE_SOF:
			if (data == CHAR_SOF)
				state = STATE_ID;
			break;
		case STATE_ID:
			ts->event = (data & 0xf0) >> 4;
			ts->len = (data & 0xf);
			ts->idx = 0;
			if (ts->event >= MAX_ID) {
				state = STATE_SOF;
				break;
			}
			ts->chksum = data;
			state = (ts->len > 0) ? STATE_DATA : STATE_EOF;
			break;
		case STATE_DATA:
			ts->chksum += data;
			ts->buf[ts->idx]= data;
			if (++ts->idx == ts->len)
				state = STATE_EOF;
			break;
		case STATE_EOF:
			state = STATE_SOF;
			if (data == CHAR_EOF || data == ts->chksum)
				h3600ts_process_packet(ts);
			break;
		default:
			printk("Error3\n");
			break;
	}

	return IRQ_HANDLED;
}

/*
 * h3600ts_connect() is the routine that is called when someone adds a
 * new serio device that supports H3600 protocol and registers it as
 * an input device.
 */
static int h3600ts_connect(struct serio *serio, struct serio_driver *drv)
{
	struct h3600_dev *ts;
	struct input_dev *input_dev;
	int err;

	ts = kzalloc(sizeof(struct h3600_dev), GFP_KERNEL);
	input_dev = input_allocate_device();
	if (!ts || !input_dev) {
		err = -ENOMEM;
		goto fail1;
	}

	ts->serio = serio;
	ts->dev = input_dev;
	snprintf(ts->phys, sizeof(ts->phys), "%s/input0", serio->phys);

	input_dev->name = "H3600 TouchScreen";
	input_dev->phys = ts->phys;
	input_dev->id.bustype = BUS_RS232;
	input_dev->id.vendor = SERIO_H3600;
	input_dev->id.product = 0x0666;  /* FIXME !!! We can ask the hardware */
	input_dev->id.version = 0x0100;
	input_dev->cdev.dev = &serio->dev;
	input_dev->private = ts;

	input_dev->event = h3600ts_event;

	input_dev->evbit[0] = BIT(EV_KEY) | BIT(EV_ABS) | BIT(EV_LED) | BIT(EV_PWR);
	input_dev->ledbit[0] = BIT(LED_SLEEP);
	input_set_abs_params(input_dev, ABS_X, 60, 985, 0, 0);
	input_set_abs_params(input_dev, ABS_Y, 35, 1024, 0, 0);

	set_bit(KEY_RECORD, input_dev->keybit);
	set_bit(KEY_Q, input_dev->keybit);
	set_bit(KEY_PROG1, input_dev->keybit);
	set_bit(KEY_PROG2, input_dev->keybit);
	set_bit(KEY_PROG3, input_dev->keybit);
	set_bit(KEY_UP, input_dev->keybit);
	set_bit(KEY_RIGHT, input_dev->keybit);
	set_bit(KEY_LEFT, input_dev->keybit);
	set_bit(KEY_DOWN, input_dev->keybit);
	set_bit(KEY_ENTER, input_dev->keybit);
	set_bit(KEY_SUSPEND, input_dev->keybit);
	set_bit(BTN_TOUCH, input_dev->keybit);

	/* Device specific stuff */
	set_GPIO_IRQ_edge(GPIO_BITSY_ACTION_BUTTON, GPIO_BOTH_EDGES);
	set_GPIO_IRQ_edge(GPIO_BITSY_NPOWER_BUTTON, GPIO_RISING_EDGE);

	if (request_irq(IRQ_GPIO_BITSY_ACTION_BUTTON, action_button_handler,
			IRQF_SHARED | IRQF_DISABLED, "h3600_action", &ts->dev)) {
		printk(KERN_ERR "h3600ts.c: Could not allocate Action Button IRQ!\n");
		err = -EBUSY;
		goto fail2;
	}

	if (request_irq(IRQ_GPIO_BITSY_NPOWER_BUTTON, npower_button_handler,
			IRQF_SHARED | IRQF_DISABLED, "h3600_suspend", &ts->dev)) {
		printk(KERN_ERR "h3600ts.c: Could not allocate Power Button IRQ!\n");
		err = -EBUSY;
		goto fail3;
	}

	serio_set_drvdata(serio, ts);

	err = serio_open(serio, drv);
	if (err)
		return err;

	//h3600_flite_control(1, 25);     /* default brightness */
	input_register_device(ts->dev);

	return 0;

fail3:	free_irq(IRQ_GPIO_BITSY_NPOWER_BUTTON, ts->dev);
fail2:	free_irq(IRQ_GPIO_BITSY_ACTION_BUTTON, ts->dev);
fail1:	serio_set_drvdata(serio, NULL);
	input_free_device(input_dev);
	kfree(ts);
	return err;
}

/*
 * h3600ts_disconnect() is the opposite of h3600ts_connect()
 */

static void h3600ts_disconnect(struct serio *serio)
{
	struct h3600_dev *ts = serio_get_drvdata(serio);

	free_irq(IRQ_GPIO_BITSY_ACTION_BUTTON, &ts->dev);
	free_irq(IRQ_GPIO_BITSY_NPOWER_BUTTON, &ts->dev);
	input_get_device(ts->dev);
	input_unregister_device(ts->dev);
	serio_close(serio);
	serio_set_drvdata(serio, NULL);
	input_put_device(ts->dev);
	kfree(ts);
}

/*
 * The serio driver structure.
 */

static struct serio_device_id h3600ts_serio_ids[] = {
	{
		.type	= SERIO_RS232,
		.proto	= SERIO_H3600,
		.id	= SERIO_ANY,
		.extra	= SERIO_ANY,
	},
	{ 0 }
};

MODULE_DEVICE_TABLE(serio, h3600ts_serio_ids);

static struct serio_driver h3600ts_drv = {
	.driver		= {
		.name	= "h3600ts",
	},
	.description	= DRIVER_DESC,
	.id_table	= h3600ts_serio_ids,
	.interrupt	= h3600ts_interrupt,
	.connect	= h3600ts_connect,
	.disconnect	= h3600ts_disconnect,
};

/*
 * The functions for inserting/removing us as a module.
 */

static int __init h3600ts_init(void)
{
	return serio_register_driver(&h3600ts_drv);
}

static void __exit h3600ts_exit(void)
{
	serio_unregister_driver(&h3600ts_drv);
}

module_init(h3600ts_init);
module_exit(h3600ts_exit);
Commit	Line	Data
1da177e4 LT	1	/*
	2	* $Id: h3600_ts_input.c,v 1.4 2002/01/23 06:39:37 jsimmons Exp $
	3	*
	4	* Copyright (c) 2001 "Crazy" James Simmons jsimmons@transvirtual.com
	5	*
	6	* Sponsored by Transvirtual Technology.
	7	*
	8	* Derived from the code in h3600_ts.[ch] by Charles Flynn
	9	*/
	10
	11	/*
	12	* Driver for the h3600 Touch Screen and other Atmel controlled devices.
	13	*/
	14
	15	/*
	16	* This program is free software; you can redistribute it and/or modify
	17	* it under the terms of the GNU General Public License as published by
	18	* the Free Software Foundation; either version 2 of the License, or
	19	* (at your option) any later version.
	20	*
	21	* This program is distributed in the hope that it will be useful,
	22	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	23	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	24	* GNU General Public License for more details.
	25	*
	26	* You should have received a copy of the GNU General Public License
	27	* along with this program; if not, write to the Free Software
	28	* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
	29	*
	30	* Should you need to contact me, the author, you can do so by
	31	* e-mail - mail your message to <jsimmons@transvirtual.com>.
	32	*/
	33
	34	#include <linux/errno.h>
	35	#include <linux/kernel.h>
	36	#include <linux/module.h>
	37	#include <linux/slab.h>
	38	#include <linux/input.h>
	39	#include <linux/serio.h>
	40	#include <linux/init.h>
	41	#include <linux/delay.h>
1da177e4 LT	42
	43	/* SA1100 serial defines */
	44	#include <asm/arch/hardware.h>
	45	#include <asm/arch/irqs.h>
	46
	47	#define DRIVER_DESC "H3600 touchscreen driver"
	48
	49	MODULE_AUTHOR("James Simmons <jsimmons@transvirtual.com>");
	50	MODULE_DESCRIPTION(DRIVER_DESC);
	51	MODULE_LICENSE("GPL");
	52
	53	/*
	54	* Definitions & global arrays.
	55	*/
	56
	57	/* The start and end of frame characters SOF and EOF */
	58	#define CHAR_SOF 0x02
	59	#define CHAR_EOF 0x03
	60	#define FRAME_OVERHEAD 3 /* CHAR_SOF,CHAR_EOF,LENGTH = 3 */
	61
	62	/*
	63	Atmel events and response IDs contained in frame.
	64	Programmer has no control over these numbers.
	65	TODO there are holes - specifically 1,7,0x0a
	66	*/
	67	#define VERSION_ID 0 /* Get Version (request/respose) */
	68	#define KEYBD_ID 2 /* Keyboard (event) */
	69	#define TOUCHS_ID 3 /* Touch Screen (event)*/
	70	#define EEPROM_READ_ID 4 /* (request/response) */
	71	#define EEPROM_WRITE_ID 5 /* (request/response) */
	72	#define THERMAL_ID 6 /* (request/response) */
	73	#define NOTIFY_LED_ID 8 /* (request/response) */
	74	#define BATTERY_ID 9 /* (request/response) */
	75	#define SPI_READ_ID 0x0b /* ( request/response) */
	76	#define SPI_WRITE_ID 0x0c /* ( request/response) */
	77	#define FLITE_ID 0x0d /* backlight ( request/response) */
	78	#define STX_ID 0xa1 /* extension pack status (req/resp) */
	79
	80	#define MAX_ID 14
	81
	82	#define H3600_MAX_LENGTH 16
	83	#define H3600_KEY 0xf
	84
	85	#define H3600_SCANCODE_RECORD 1 /* 1 -> record button */
	86	#define H3600_SCANCODE_CALENDAR 2 /* 2 -> calendar */
	87	#define H3600_SCANCODE_CONTACTS 3 /* 3 -> contact */
	88	#define H3600_SCANCODE_Q 4 /* 4 -> Q button */
	89	#define H3600_SCANCODE_START 5 /* 5 -> start menu */
	90	#define H3600_SCANCODE_UP 6 /* 6 -> up */
de1b963a DT	91	#define H3600_SCANCODE_RIGHT 7 /* 7 -> right */
	92	#define H3600_SCANCODE_LEFT 8 /* 8 -> left */
	93	#define H3600_SCANCODE_DOWN 9 /* 9 -> down */
1da177e4	94
1da177e4 LT	95	/*
	96	* Per-touchscreen data.
	97	*/
	98	struct h3600_dev {
eca1ed19	99	struct input_dev *dev;
1da177e4	100	struct serio *serio;
1da177e4 LT	101	unsigned char event; /* event ID from packet */
	102	unsigned char chksum;
	103	unsigned char len;
	104	unsigned char idx;
	105	unsigned char buf[H3600_MAX_LENGTH];
	106	char phys[32];
	107	};
	108
7d12e780	109	static irqreturn_t action_button_handler(int irq, void *dev_id)
1da177e4	110	{
de1b963a	111	int down = (GPLR & GPIO_BITSY_ACTION_BUTTON) ? 0 : 1;
1da177e4 LT	112	struct input_dev dev = (struct input_dev ) dev_id;
1da177e4 LT	113
1da177e4 LT	114	input_report_key(dev, KEY_ENTER, down);
	115	input_sync(dev);
	116
	117	return IRQ_HANDLED;
	118	}
	119
7d12e780	120	static irqreturn_t npower_button_handler(int irq, void *dev_id)
1da177e4	121	{
de1b963a	122	int down = (GPLR & GPIO_BITSY_NPOWER_BUTTON) ? 0 : 1;
1da177e4 LT	123	struct input_dev dev = (struct input_dev ) dev_id;
	124
	125	/*
	126	* This interrupt is only called when we release the key. So we have
	127	* to fake a key press.
	128	*/
1da177e4 LT	129	input_report_key(dev, KEY_SUSPEND, 1);
	130	input_report_key(dev, KEY_SUSPEND, down);
	131	input_sync(dev);
	132
	133	return IRQ_HANDLED;
	134	}
	135
	136	#ifdef CONFIG_PM
	137
	138	static int flite_brightness = 25;
	139
	140	enum flite_pwr {
de1b963a DT	141	FLITE_PWR_OFF = 0,
de1b963a DT	142	FLITE_PWR_ON = 1
1da177e4 LT	143	};
	144
	145	/*
	146	* h3600_flite_power: enables or disables power to frontlight, using last bright */
	147	unsigned int h3600_flite_power(struct input_dev *dev, enum flite_pwr pwr)
	148	{
	149	unsigned char brightness = (pwr == FLITE_PWR_OFF) ? 0 : flite_brightness;
	150	struct h3600_dev *ts = dev->private;
	151
	152	/* Must be in this order */
de1b963a	153	ts->serio->write(ts->serio, 1);
1da177e4	154	ts->serio->write(ts->serio, pwr);
de1b963a	155	ts->serio->write(ts->serio, brightness);
1da177e4 LT	156	return 0;
	157	}
	158
1da177e4 LT	159	#endif
	160
	161	/*
	162	* This function translates the native event packets to linux input event
	163	* packets. Some packets coming from serial are not touchscreen related. In
	164	* this case we send them off to be processed elsewhere.
	165	*/
7d12e780	166	static void h3600ts_process_packet(struct h3600_dev *ts)
1da177e4	167	{
eca1ed19	168	struct input_dev *dev = ts->dev;
1da177e4 LT	169	static int touched = 0;
	170	int key, down = 0;
	171
de1b963a DT	172	switch (ts->event) {
	173	/*
	174	Buttons - returned as a single byte
	175	7 6 5 4 3 2 1 0
	176	S x x x N N N N
1da177e4	177
de1b963a DT	178	S switch state ( 0=pressed 1=released)
	179	x Unused.
	180	NNNN switch number 0-15
1da177e4	181
de1b963a DT	182	Note: This is true for non interrupt generated key events.
	183	*/
	184	case KEYBD_ID:
1da177e4 LT	185	down = (ts->buf[0] & 0x80) ? 0 : 1;
	186
	187	switch (ts->buf[0] & 0x7f) {
	188	case H3600_SCANCODE_RECORD:
	189	key = KEY_RECORD;
	190	break;
	191	case H3600_SCANCODE_CALENDAR:
	192	key = KEY_PROG1;
	193	break;
	194	case H3600_SCANCODE_CONTACTS:
	195	key = KEY_PROG2;
de1b963a	196	break;
1da177e4 LT	197	case H3600_SCANCODE_Q:
1da177e4 LT	198	key = KEY_Q;
de1b963a	199	break;
1da177e4 LT	200	case H3600_SCANCODE_START:
1da177e4 LT	201	key = KEY_PROG3;
de1b963a	202	break;
1da177e4 LT	203	case H3600_SCANCODE_UP:
1da177e4 LT	204	key = KEY_UP;
de1b963a	205	break;
1da177e4 LT	206	case H3600_SCANCODE_RIGHT:
1da177e4 LT	207	key = KEY_RIGHT;
de1b963a	208	break;
1da177e4 LT	209	case H3600_SCANCODE_LEFT:
1da177e4 LT	210	key = KEY_LEFT;
de1b963a	211	break;
1da177e4 LT	212	case H3600_SCANCODE_DOWN:
1da177e4 LT	213	key = KEY_DOWN;
de1b963a	214	break;
1da177e4 LT	215	default:
	216	key = 0;
	217	}
de1b963a DT	218	if (key)
	219	input_report_key(dev, key, down);
	220	break;
	221	/*
	222	* Native touchscreen event data is formatted as shown below:-
	223	*
	224	* +-------+-------+-------+-------+
	225	* \| Xmsb \| Xlsb \| Ymsb \| Ylsb \|
	226	* +-------+-------+-------+-------+
	227	* byte 0 1 2 3
	228	*/
	229	case TOUCHS_ID:
1da177e4 LT	230	if (!touched) {
	231	input_report_key(dev, BTN_TOUCH, 1);
	232	touched = 1;
	233	}
	234
	235	if (ts->len) {
	236	unsigned short x, y;
	237
	238	x = ts->buf[0]; x <<= 8; x += ts->buf[1];
de1b963a	239	y = ts->buf[2]; y <<= 8; y += ts->buf[3];
1da177e4	240
de1b963a DT	241	input_report_abs(dev, ABS_X, x);
de1b963a DT	242	input_report_abs(dev, ABS_Y, y);
1da177e4	243	} else {
de1b963a	244	input_report_key(dev, BTN_TOUCH, 0);
1da177e4 LT	245	touched = 0;
1da177e4 LT	246	}
de1b963a	247	break;
1da177e4 LT	248	default:
	249	/* Send a non input event elsewhere */
	250	break;
de1b963a	251	}
1da177e4 LT	252
	253	input_sync(dev);
	254	}
	255
	256	/*
	257	* h3600ts_event() handles events from the input module.
	258	*/
	259	static int h3600ts_event(struct input_dev *dev, unsigned int type,
de1b963a	260	unsigned int code, int value)
1da177e4	261	{
eca1ed19	262	#if 0
1da177e4 LT	263	struct h3600_dev *ts = dev->private;
	264
	265	switch (type) {
	266	case EV_LED: {
	267	// ts->serio->write(ts->serio, SOME_CMD);
	268	return 0;
	269	}
	270	}
	271	return -1;
eca1ed19 DT	272	#endif
eca1ed19 DT	273	return 0;
1da177e4 LT	274	}
	275
	276	/*
	277	Frame format
	278	byte 1 2 3 len + 4
	279	+-------+---------------+---------------+--=------------+
	280	\|SOF \|id \|len \| len bytes \| Chksum \|
	281	+-------+---------------+---------------+--=------------+
	282	bit 0 7 8 11 12 15 16
	283
	284	+-------+---------------+-------+
	285	\|SOF \|id \|0 \|Chksum \| - Note Chksum does not include SOF
	286	+-------+---------------+-------+
	287	bit 0 7 8 11 12 15 16
	288
	289	*/
	290
	291	static int state;
	292
	293	/* decode States */
	294	#define STATE_SOF 0 /* start of FRAME */
	295	#define STATE_ID 1 /* state where we decode the ID & len */
	296	#define STATE_DATA 2 /* state where we decode data */
	297	#define STATE_EOF 3 /* state where we decode checksum or EOF */
	298
	299	static irqreturn_t h3600ts_interrupt(struct serio *serio, unsigned char data,
7d12e780	300	unsigned int flags)
1da177e4	301	{
de1b963a	302	struct h3600_dev *ts = serio_get_drvdata(serio);
1da177e4 LT	303
1da177e4 LT	304	/*
de1b963a DT	305	* We have a new frame coming in.
de1b963a DT	306	*/
1da177e4 LT	307	switch (state) {
1da177e4 LT	308	case STATE_SOF:
de1b963a DT	309	if (data == CHAR_SOF)
de1b963a DT	310	state = STATE_ID;
1da177e4	311	break;
de1b963a	312	case STATE_ID:
1da177e4 LT	313	ts->event = (data & 0xf0) >> 4;
	314	ts->len = (data & 0xf);
	315	ts->idx = 0;
	316	if (ts->event >= MAX_ID) {
	317	state = STATE_SOF;
de1b963a	318	break;
1da177e4 LT	319	}
1da177e4 LT	320	ts->chksum = data;
de1b963a	321	state = (ts->len > 0) ? STATE_DATA : STATE_EOF;
1da177e4 LT	322	break;
	323	case STATE_DATA:
	324	ts->chksum += data;
	325	ts->buf[ts->idx]= data;
de1b963a DT	326	if (++ts->idx == ts->len)
de1b963a DT	327	state = STATE_EOF;
1da177e4 LT	328	break;
1da177e4 LT	329	case STATE_EOF:
de1b963a DT	330	state = STATE_SOF;
de1b963a DT	331	if (data == CHAR_EOF \|\| data == ts->chksum)
7d12e780	332	h3600ts_process_packet(ts);
de1b963a DT	333	break;
	334	default:
	335	printk("Error3\n");
	336	break;
1da177e4 LT	337	}
	338
	339	return IRQ_HANDLED;
	340	}
	341
	342	/*
	343	* h3600ts_connect() is the routine that is called when someone adds a
	344	* new serio device that supports H3600 protocol and registers it as
	345	* an input device.
	346	*/
	347	static int h3600ts_connect(struct serio serio, struct serio_driver drv)
	348	{
	349	struct h3600_dev *ts;
eca1ed19	350	struct input_dev *input_dev;
1da177e4 LT	351	int err;
1da177e4 LT	352
eca1ed19 DT	353	ts = kzalloc(sizeof(struct h3600_dev), GFP_KERNEL);
	354	input_dev = input_allocate_device();
	355	if (!ts \|\| !input_dev) {
	356	err = -ENOMEM;
	357	goto fail1;
	358	}
1da177e4	359
eca1ed19 DT	360	ts->serio = serio;
eca1ed19 DT	361	ts->dev = input_dev;
a21466cc	362	snprintf(ts->phys, sizeof(ts->phys), "%s/input0", serio->phys);
1da177e4	363
eca1ed19 DT	364	input_dev->name = "H3600 TouchScreen";
	365	input_dev->phys = ts->phys;
	366	input_dev->id.bustype = BUS_RS232;
	367	input_dev->id.vendor = SERIO_H3600;
	368	input_dev->id.product = 0x0666; /* FIXME !!! We can ask the hardware */
	369	input_dev->id.version = 0x0100;
	370	input_dev->cdev.dev = &serio->dev;
	371	input_dev->private = ts;
	372
	373	input_dev->event = h3600ts_event;
	374
	375	input_dev->evbit[0] = BIT(EV_KEY) \| BIT(EV_ABS) \| BIT(EV_LED) \| BIT(EV_PWR);
	376	input_dev->ledbit[0] = BIT(LED_SLEEP);
	377	input_set_abs_params(input_dev, ABS_X, 60, 985, 0, 0);
	378	input_set_abs_params(input_dev, ABS_Y, 35, 1024, 0, 0);
	379
	380	set_bit(KEY_RECORD, input_dev->keybit);
	381	set_bit(KEY_Q, input_dev->keybit);
	382	set_bit(KEY_PROG1, input_dev->keybit);
	383	set_bit(KEY_PROG2, input_dev->keybit);
	384	set_bit(KEY_PROG3, input_dev->keybit);
	385	set_bit(KEY_UP, input_dev->keybit);
	386	set_bit(KEY_RIGHT, input_dev->keybit);
	387	set_bit(KEY_LEFT, input_dev->keybit);
	388	set_bit(KEY_DOWN, input_dev->keybit);
	389	set_bit(KEY_ENTER, input_dev->keybit);
	390	set_bit(KEY_SUSPEND, input_dev->keybit);
	391	set_bit(BTN_TOUCH, input_dev->keybit);
1da177e4 LT	392
1da177e4 LT	393	/* Device specific stuff */
de1b963a DT	394	set_GPIO_IRQ_edge(GPIO_BITSY_ACTION_BUTTON, GPIO_BOTH_EDGES);
de1b963a DT	395	set_GPIO_IRQ_edge(GPIO_BITSY_NPOWER_BUTTON, GPIO_RISING_EDGE);
1da177e4	396
de1b963a	397	if (request_irq(IRQ_GPIO_BITSY_ACTION_BUTTON, action_button_handler,
dace1453	398	IRQF_SHARED \| IRQF_DISABLED, "h3600_action", &ts->dev)) {
1da177e4	399	printk(KERN_ERR "h3600ts.c: Could not allocate Action Button IRQ!\n");
eca1ed19 DT	400	err = -EBUSY;
eca1ed19 DT	401	goto fail2;
1da177e4 LT	402	}
1da177e4 LT	403
de1b963a	404	if (request_irq(IRQ_GPIO_BITSY_NPOWER_BUTTON, npower_button_handler,
dace1453	405	IRQF_SHARED \| IRQF_DISABLED, "h3600_suspend", &ts->dev)) {
1da177e4	406	printk(KERN_ERR "h3600ts.c: Could not allocate Power Button IRQ!\n");
eca1ed19 DT	407	err = -EBUSY;
eca1ed19 DT	408	goto fail3;
1da177e4 LT	409	}
1da177e4 LT	410
1da177e4 LT	411	serio_set_drvdata(serio, ts);
	412
	413	err = serio_open(serio, drv);
eca1ed19	414	if (err)
1da177e4	415	return err;
1da177e4 LT	416
1da177e4 LT	417	//h3600_flite_control(1, 25); /* default brightness */
eca1ed19	418	input_register_device(ts->dev);
1da177e4 LT	419
1da177e4 LT	420	return 0;
eca1ed19 DT	421
	422	fail3: free_irq(IRQ_GPIO_BITSY_NPOWER_BUTTON, ts->dev);
	423	fail2: free_irq(IRQ_GPIO_BITSY_ACTION_BUTTON, ts->dev);
	424	fail1: serio_set_drvdata(serio, NULL);
	425	input_free_device(input_dev);
	426	kfree(ts);
	427	return err;
1da177e4 LT	428	}
	429
	430	/*
	431	* h3600ts_disconnect() is the opposite of h3600ts_connect()
	432	*/
	433
	434	static void h3600ts_disconnect(struct serio *serio)
	435	{
	436	struct h3600_dev *ts = serio_get_drvdata(serio);
	437
	438	free_irq(IRQ_GPIO_BITSY_ACTION_BUTTON, &ts->dev);
	439	free_irq(IRQ_GPIO_BITSY_NPOWER_BUTTON, &ts->dev);
eca1ed19 DT	440	input_get_device(ts->dev);
eca1ed19 DT	441	input_unregister_device(ts->dev);
1da177e4 LT	442	serio_close(serio);
1da177e4 LT	443	serio_set_drvdata(serio, NULL);
eca1ed19	444	input_put_device(ts->dev);
1da177e4 LT	445	kfree(ts);
	446	}
	447
	448	/*
	449	* The serio driver structure.
	450	*/
	451
	452	static struct serio_device_id h3600ts_serio_ids[] = {
	453	{
	454	.type = SERIO_RS232,
	455	.proto = SERIO_H3600,
	456	.id = SERIO_ANY,
	457	.extra = SERIO_ANY,
	458	},
	459	{ 0 }
	460	};
	461
	462	MODULE_DEVICE_TABLE(serio, h3600ts_serio_ids);
	463
	464	static struct serio_driver h3600ts_drv = {
	465	.driver = {
	466	.name = "h3600ts",
	467	},
	468	.description = DRIVER_DESC,
	469	.id_table = h3600ts_serio_ids,
	470	.interrupt = h3600ts_interrupt,
	471	.connect = h3600ts_connect,
	472	.disconnect = h3600ts_disconnect,
	473	};
	474
	475	/*
	476	* The functions for inserting/removing us as a module.
	477	*/
	478
	479	static int __init h3600ts_init(void)
	480	{
153a9df0	481	return serio_register_driver(&h3600ts_drv);
1da177e4 LT	482	}
	483
	484	static void __exit h3600ts_exit(void)
	485	{
	486	serio_unregister_driver(&h3600ts_drv);
	487	}
	488
	489	module_init(h3600ts_init);
	490	module_exit(h3600ts_exit);