[linux-2.6-block.git] / drivers / media / video / em28xx / em28xx-input.c

/*
  handle em28xx IR remotes via linux kernel input layer.

   Copyright (C) 2005 Ludovico Cavedon <cavedon@sssup.it>
		      Markus Rechberger <mrechberger@gmail.com>
		      Mauro Carvalho Chehab <mchehab@infradead.org>
		      Sascha Sommer <saschasommer@freenet.de>

  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
 */

#include <linux/module.h>
#include <linux/init.h>
#include <linux/delay.h>
#include <linux/interrupt.h>
#include <linux/input.h>
#include <linux/usb.h>

#include "em28xx.h"

#define EM28XX_SNAPSHOT_KEY KEY_CAMERA
#define EM28XX_SBUTTON_QUERY_INTERVAL 500
#define EM28XX_R0C_USBSUSP_SNAPSHOT 0x20

static unsigned int ir_debug;
module_param(ir_debug, int, 0644);
MODULE_PARM_DESC(ir_debug, "enable debug messages [IR]");

#define i2cdprintk(fmt, arg...) \
	if (ir_debug) { \
		printk(KERN_DEBUG "%s/ir: " fmt, ir->name , ## arg); \
	}

#define dprintk(fmt, arg...) \
	if (ir_debug) { \
		printk(KERN_DEBUG "%s/ir: " fmt, ir->name , ## arg); \
	}

/**********************************************************
 Polling structure used by em28xx IR's
 **********************************************************/

struct em28xx_ir_poll_result {
	unsigned int toggle_bit:1;
	unsigned int read_count:7;
	u8 rc_address;
	u8 rc_data[4]; /* 1 byte on em2860/2880, 4 on em2874 */
};

struct em28xx_IR {
	struct em28xx *dev;
	struct input_dev *input;
	struct ir_input_state ir;
	char name[32];
	char phys[32];

	/* poll external decoder */
	int polling;
	struct delayed_work work;
	unsigned int last_toggle:1;
	unsigned int full_code:1;
	unsigned int last_readcount;
	unsigned int repeat_interval;

	int  (*get_key)(struct em28xx_IR *, struct em28xx_ir_poll_result *);
};

/**********************************************************
 I2C IR based get keycodes - should be used with ir-kbd-i2c
 **********************************************************/

int em28xx_get_key_terratec(struct IR_i2c *ir, u32 *ir_key, u32 *ir_raw)
{
	unsigned char b;

	/* poll IR chip */
	if (1 != i2c_master_recv(ir->c, &b, 1)) {
		i2cdprintk("read error\n");
		return -EIO;
	}

	/* it seems that 0xFE indicates that a button is still hold
	   down, while 0xff indicates that no button is hold
	   down. 0xfe sequences are sometimes interrupted by 0xFF */

	i2cdprintk("key %02x\n", b);

	if (b == 0xff)
		return 0;

	if (b == 0xfe)
		/* keep old data */
		return 1;

	*ir_key = b;
	*ir_raw = b;
	return 1;
}

int em28xx_get_key_em_haup(struct IR_i2c *ir, u32 *ir_key, u32 *ir_raw)
{
	unsigned char buf[2];
	u16 code;
	int size;

	/* poll IR chip */
	size = i2c_master_recv(ir->c, buf, sizeof(buf));

	if (size != 2)
		return -EIO;

	/* Does eliminate repeated parity code */
	if (buf[1] == 0xff)
		return 0;

	ir->old = buf[1];

	/*
	 * Rearranges bits to the right order.
	 * The bit order were determined experimentally by using
	 * The original Hauppauge Grey IR and another RC5 that uses addr=0x08
	 * The RC5 code has 14 bits, but we've experimentally determined
	 * the meaning for only 11 bits.
	 * So, the code translation is not complete. Yet, it is enough to
	 * work with the provided RC5 IR.
	 */
	code =
		 ((buf[0] & 0x01) ? 0x0020 : 0) | /* 		0010 0000 */
		 ((buf[0] & 0x02) ? 0x0010 : 0) | /* 		0001 0000 */
		 ((buf[0] & 0x04) ? 0x0008 : 0) | /* 		0000 1000 */
		 ((buf[0] & 0x08) ? 0x0004 : 0) | /* 		0000 0100 */
		 ((buf[0] & 0x10) ? 0x0002 : 0) | /* 		0000 0010 */
		 ((buf[0] & 0x20) ? 0x0001 : 0) | /* 		0000 0001 */
		 ((buf[1] & 0x08) ? 0x1000 : 0) | /* 0001 0000		  */
		 ((buf[1] & 0x10) ? 0x0800 : 0) | /* 0000 1000		  */
		 ((buf[1] & 0x20) ? 0x0400 : 0) | /* 0000 0100		  */
		 ((buf[1] & 0x40) ? 0x0200 : 0) | /* 0000 0010		  */
		 ((buf[1] & 0x80) ? 0x0100 : 0);  /* 0000 0001		  */

	i2cdprintk("ir hauppauge (em2840): code=0x%02x (rcv=0x%02x%02x)\n",
			code, buf[1], buf[0]);

	/* return key */
	*ir_key = code;
	*ir_raw = code;
	return 1;
}

int em28xx_get_key_pinnacle_usb_grey(struct IR_i2c *ir, u32 *ir_key,
				     u32 *ir_raw)
{
	unsigned char buf[3];

	/* poll IR chip */

	if (3 != i2c_master_recv(ir->c, buf, 3)) {
		i2cdprintk("read error\n");
		return -EIO;
	}

	i2cdprintk("key %02x\n", buf[2]&0x3f);
	if (buf[0] != 0x00)
		return 0;

	*ir_key = buf[2]&0x3f;
	*ir_raw = buf[2]&0x3f;

	return 1;
}

/**********************************************************
 Poll based get keycode functions
 **********************************************************/

/* This is for the em2860/em2880 */
static int default_polling_getkey(struct em28xx_IR *ir,
				  struct em28xx_ir_poll_result *poll_result)
{
	struct em28xx *dev = ir->dev;
	int rc;
	u8 msg[3] = { 0, 0, 0 };

	/* Read key toggle, brand, and key code
	   on registers 0x45, 0x46 and 0x47
	 */
	rc = dev->em28xx_read_reg_req_len(dev, 0, EM28XX_R45_IR,
					  msg, sizeof(msg));
	if (rc < 0)
		return rc;

	/* Infrared toggle (Reg 0x45[7]) */
	poll_result->toggle_bit = (msg[0] >> 7);

	/* Infrared read count (Reg 0x45[6:0] */
	poll_result->read_count = (msg[0] & 0x7f);

	/* Remote Control Address (Reg 0x46) */
	poll_result->rc_address = msg[1];

	/* Remote Control Data (Reg 0x47) */
	poll_result->rc_data[0] = msg[2];

	return 0;
}

static int em2874_polling_getkey(struct em28xx_IR *ir,
				 struct em28xx_ir_poll_result *poll_result)
{
	struct em28xx *dev = ir->dev;
	int rc;
	u8 msg[5] = { 0, 0, 0, 0, 0 };

	/* Read key toggle, brand, and key code
	   on registers 0x51-55
	 */
	rc = dev->em28xx_read_reg_req_len(dev, 0, EM2874_R51_IR,
					  msg, sizeof(msg));
	if (rc < 0)
		return rc;

	/* Infrared toggle (Reg 0x51[7]) */
	poll_result->toggle_bit = (msg[0] >> 7);

	/* Infrared read count (Reg 0x51[6:0] */
	poll_result->read_count = (msg[0] & 0x7f);

	/* Remote Control Address (Reg 0x52) */
	poll_result->rc_address = msg[1];

	/* Remote Control Data (Reg 0x53-55) */
	poll_result->rc_data[0] = msg[2];
	poll_result->rc_data[1] = msg[3];
	poll_result->rc_data[2] = msg[4];

	return 0;
}

/**********************************************************
 Polling code for em28xx
 **********************************************************/

static void em28xx_ir_handle_key(struct em28xx_IR *ir)
{
	int result;
	int do_sendkey = 0;
	struct em28xx_ir_poll_result poll_result;

	/* read the registers containing the IR status */
	result = ir->get_key(ir, &poll_result);
	if (result < 0) {
		dprintk("ir->get_key() failed %d\n", result);
		return;
	}

	dprintk("ir->get_key result tb=%02x rc=%02x lr=%02x data=%02x%02x\n",
		poll_result.toggle_bit, poll_result.read_count,
		ir->last_readcount, poll_result.rc_address,
		poll_result.rc_data[0]);

	if (ir->dev->chip_id == CHIP_ID_EM2874) {
		/* The em2874 clears the readcount field every time the
		   register is read.  The em2860/2880 datasheet says that it
		   is supposed to clear the readcount, but it doesn't.  So with
		   the em2874, we are looking for a non-zero read count as
		   opposed to a readcount that is incrementing */
		ir->last_readcount = 0;
	}

	if (poll_result.read_count == 0) {
		/* The button has not been pressed since the last read */
	} else if (ir->last_toggle != poll_result.toggle_bit) {
		/* A button has been pressed */
		dprintk("button has been pressed\n");
		ir->last_toggle = poll_result.toggle_bit;
		ir->repeat_interval = 0;
		do_sendkey = 1;
	} else if (poll_result.toggle_bit == ir->last_toggle &&
		   poll_result.read_count > 0 &&
		   poll_result.read_count != ir->last_readcount) {
		/* The button is still being held down */
		dprintk("button being held down\n");

		/* Debouncer for first keypress */
		if (ir->repeat_interval++ > 9) {
			/* Start repeating after 1 second */
			do_sendkey = 1;
		}
	}

	if (do_sendkey) {
		dprintk("sending keypress\n");

		if (ir->full_code)
			ir_input_keydown(ir->input, &ir->ir,
					 poll_result.rc_address << 8 |
					 poll_result.rc_data[0]);
		else
			ir_input_keydown(ir->input, &ir->ir,
					 poll_result.rc_data[0]);

		ir_input_nokey(ir->input, &ir->ir);
	}

	ir->last_readcount = poll_result.read_count;
	return;
}

static void em28xx_ir_work(struct work_struct *work)
{
	struct em28xx_IR *ir = container_of(work, struct em28xx_IR, work.work);

	em28xx_ir_handle_key(ir);
	schedule_delayed_work(&ir->work, msecs_to_jiffies(ir->polling));
}

static void em28xx_ir_start(struct em28xx_IR *ir)
{
	INIT_DELAYED_WORK(&ir->work, em28xx_ir_work);
	schedule_delayed_work(&ir->work, 0);
}

static void em28xx_ir_stop(struct em28xx_IR *ir)
{
	cancel_delayed_work_sync(&ir->work);
}

int em28xx_ir_init(struct em28xx *dev)
{
	struct em28xx_IR *ir;
	struct input_dev *input_dev;
	u8 ir_config;
	int err = -ENOMEM;

	if (dev->board.ir_codes == NULL) {
		/* No remote control support */
		return 0;
	}

	ir = kzalloc(sizeof(*ir), GFP_KERNEL);
	input_dev = input_allocate_device();
	if (!ir || !input_dev)
		goto err_out_free;

	ir->input = input_dev;
	ir_config = EM2874_IR_RC5;

	/* Adjust xclk based o IR table for RC5/NEC tables */
	if (dev->board.ir_codes->ir_type == IR_TYPE_RC5) {
		dev->board.xclk |= EM28XX_XCLK_IR_RC5_MODE;
		ir->full_code = 1;
	} else  if (dev->board.ir_codes->ir_type == IR_TYPE_NEC) {
		dev->board.xclk &= ~EM28XX_XCLK_IR_RC5_MODE;
		ir_config = EM2874_IR_NEC;
		ir->full_code = 1;
	}
	em28xx_write_reg_bits(dev, EM28XX_R0F_XCLK, dev->board.xclk,
			      EM28XX_XCLK_IR_RC5_MODE);

	/* Setup the proper handler based on the chip */
	switch (dev->chip_id) {
	case CHIP_ID_EM2860:
	case CHIP_ID_EM2883:
		ir->get_key = default_polling_getkey;
		break;
	case CHIP_ID_EM2874:
		ir->get_key = em2874_polling_getkey;
		em28xx_write_regs(dev, EM2874_R50_IR_CONFIG, &ir_config, 1);
		break;
	default:
		printk("Unrecognized em28xx chip id: IR not supported\n");
		goto err_out_free;
	}

	/* This is how often we ask the chip for IR information */
	ir->polling = 100; /* ms */

	/* init input device */
	snprintf(ir->name, sizeof(ir->name), "em28xx IR (%s)",
						dev->name);

	usb_make_path(dev->udev, ir->phys, sizeof(ir->phys));
	strlcat(ir->phys, "/input0", sizeof(ir->phys));

	err = ir_input_init(input_dev, &ir->ir, IR_TYPE_OTHER);
	if (err < 0)
		goto err_out_free;

	input_dev->name = ir->name;
	input_dev->phys = ir->phys;
	input_dev->id.bustype = BUS_USB;
	input_dev->id.version = 1;
	input_dev->id.vendor = le16_to_cpu(dev->udev->descriptor.idVendor);
	input_dev->id.product = le16_to_cpu(dev->udev->descriptor.idProduct);

	input_dev->dev.parent = &dev->udev->dev;
	/* record handles to ourself */
	ir->dev = dev;
	dev->ir = ir;

	em28xx_ir_start(ir);

	/* all done */
	err = ir_input_register(ir->input, dev->board.ir_codes);
	if (err)
		goto err_out_stop;

	return 0;
 err_out_stop:
	em28xx_ir_stop(ir);
	dev->ir = NULL;
 err_out_free:
	kfree(ir);
	return err;
}

int em28xx_ir_fini(struct em28xx *dev)
{
	struct em28xx_IR *ir = dev->ir;

	/* skip detach on non attached boards */
	if (!ir)
		return 0;

	em28xx_ir_stop(ir);
	ir_input_unregister(ir->input);
	kfree(ir);

	/* done */
	dev->ir = NULL;
	return 0;
}

/**********************************************************
 Handle Webcam snapshot button
 **********************************************************/

static void em28xx_query_sbutton(struct work_struct *work)
{
	/* Poll the register and see if the button is depressed */
	struct em28xx *dev =
		container_of(work, struct em28xx, sbutton_query_work.work);
	int ret;

	ret = em28xx_read_reg(dev, EM28XX_R0C_USBSUSP);

	if (ret & EM28XX_R0C_USBSUSP_SNAPSHOT) {
		u8 cleared;
		/* Button is depressed, clear the register */
		cleared = ((u8) ret) & ~EM28XX_R0C_USBSUSP_SNAPSHOT;
		em28xx_write_regs(dev, EM28XX_R0C_USBSUSP, &cleared, 1);

		/* Not emulate the keypress */
		input_report_key(dev->sbutton_input_dev, EM28XX_SNAPSHOT_KEY,
				 1);
		/* Now unpress the key */
		input_report_key(dev->sbutton_input_dev, EM28XX_SNAPSHOT_KEY,
				 0);
	}

	/* Schedule next poll */
	schedule_delayed_work(&dev->sbutton_query_work,
			      msecs_to_jiffies(EM28XX_SBUTTON_QUERY_INTERVAL));
}

void em28xx_register_snapshot_button(struct em28xx *dev)
{
	struct input_dev *input_dev;
	int err;

	em28xx_info("Registering snapshot button...\n");
	input_dev = input_allocate_device();
	if (!input_dev) {
		em28xx_errdev("input_allocate_device failed\n");
		return;
	}

	usb_make_path(dev->udev, dev->snapshot_button_path,
		      sizeof(dev->snapshot_button_path));
	strlcat(dev->snapshot_button_path, "/sbutton",
		sizeof(dev->snapshot_button_path));
	INIT_DELAYED_WORK(&dev->sbutton_query_work, em28xx_query_sbutton);

	input_dev->name = "em28xx snapshot button";
	input_dev->phys = dev->snapshot_button_path;
	input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REP);
	set_bit(EM28XX_SNAPSHOT_KEY, input_dev->keybit);
	input_dev->keycodesize = 0;
	input_dev->keycodemax = 0;
	input_dev->id.bustype = BUS_USB;
	input_dev->id.vendor = le16_to_cpu(dev->udev->descriptor.idVendor);
	input_dev->id.product = le16_to_cpu(dev->udev->descriptor.idProduct);
	input_dev->id.version = 1;
	input_dev->dev.parent = &dev->udev->dev;

	err = input_register_device(input_dev);
	if (err) {
		em28xx_errdev("input_register_device failed\n");
		input_free_device(input_dev);
		return;
	}

	dev->sbutton_input_dev = input_dev;
	schedule_delayed_work(&dev->sbutton_query_work,
			      msecs_to_jiffies(EM28XX_SBUTTON_QUERY_INTERVAL));
	return;

}

void em28xx_deregister_snapshot_button(struct em28xx *dev)
{
	if (dev->sbutton_input_dev != NULL) {
		em28xx_info("Deregistering snapshot button\n");
		cancel_rearming_delayed_work(&dev->sbutton_query_work);
		input_unregister_device(dev->sbutton_input_dev);
		dev->sbutton_input_dev = NULL;
	}
	return;
}
Commit	Line	Data
d5e52653	1	/*
f7abcd38 MCC	2	handle em28xx IR remotes via linux kernel input layer.
	3
	4	Copyright (C) 2005 Ludovico Cavedon <cavedon@sssup.it>
	5	Markus Rechberger <mrechberger@gmail.com>
2e7c6dc3	6	Mauro Carvalho Chehab <mchehab@infradead.org>
f7abcd38 MCC	7	Sascha Sommer <saschasommer@freenet.de>
	8
	9	This program is free software; you can redistribute it and/or modify
	10	it under the terms of the GNU General Public License as published by
	11	the Free Software Foundation; either version 2 of the License, or
	12	(at your option) any later version.
	13
	14	This program is distributed in the hope that it will be useful,
	15	but WITHOUT ANY WARRANTY; without even the implied warranty of
	16	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	17	GNU General Public License for more details.
	18
	19	You should have received a copy of the GNU General Public License
	20	along with this program; if not, write to the Free Software
	21	Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
d5e52653 MCC	22	*/
	23
	24	#include <linux/module.h>
d5e52653 MCC	25	#include <linux/init.h>
d5e52653 MCC	26	#include <linux/delay.h>
d5e52653 MCC	27	#include <linux/interrupt.h>
	28	#include <linux/input.h>
	29	#include <linux/usb.h>
	30
f7abcd38	31	#include "em28xx.h"
d5e52653	32
a9fc52bc DH	33	#define EM28XX_SNAPSHOT_KEY KEY_CAMERA
	34	#define EM28XX_SBUTTON_QUERY_INTERVAL 500
	35	#define EM28XX_R0C_USBSUSP_SNAPSHOT 0x20
	36
c8793b03	37	static unsigned int ir_debug;
d5e52653	38	module_param(ir_debug, int, 0644);
6ea54d93	39	MODULE_PARM_DESC(ir_debug, "enable debug messages [IR]");
d5e52653	40
a924a499	41	#define i2cdprintk(fmt, arg...) \
6ea54d93	42	if (ir_debug) { \
1df8e986	43	printk(KERN_DEBUG "%s/ir: " fmt, ir->name , ## arg); \
6ea54d93	44	}
d5e52653	45
a924a499 MCC	46	#define dprintk(fmt, arg...) \
	47	if (ir_debug) { \
	48	printk(KERN_DEBUG "%s/ir: " fmt, ir->name , ## arg); \
	49	}
	50
	51	/**********************************************************
	52	Polling structure used by em28xx IR's
	53	**********************************************************/
	54
4b92253a DH	55	struct em28xx_ir_poll_result {
	56	unsigned int toggle_bit:1;
	57	unsigned int read_count:7;
	58	u8 rc_address;
	59	u8 rc_data[4]; /* 1 byte on em2860/2880, 4 on em2874 */
	60	};
	61
a924a499 MCC	62	struct em28xx_IR {
	63	struct em28xx *dev;
	64	struct input_dev *input;
	65	struct ir_input_state ir;
	66	char name[32];
	67	char phys[32];
	68
	69	/* poll external decoder */
	70	int polling;
f263bac9	71	struct delayed_work work;
4b92253a	72	unsigned int last_toggle:1;
0278155c	73	unsigned int full_code:1;
4b92253a DH	74	unsigned int last_readcount;
4b92253a DH	75	unsigned int repeat_interval;
a924a499	76
4b92253a	77	int (get_key)(struct em28xx_IR , struct em28xx_ir_poll_result *);
a924a499 MCC	78	};
	79
	80	/**********************************************************
	81	I2C IR based get keycodes - should be used with ir-kbd-i2c
	82	**********************************************************/
d5e52653	83
c8793b03	84	int em28xx_get_key_terratec(struct IR_i2c ir, u32 ir_key, u32 *ir_raw)
e43f14af MR	85	{
	86	unsigned char b;
	87
	88	/* poll IR chip */
c668f32d	89	if (1 != i2c_master_recv(ir->c, &b, 1)) {
a924a499	90	i2cdprintk("read error\n");
e43f14af MR	91	return -EIO;
	92	}
	93
	94	/* it seems that 0xFE indicates that a button is still hold
4f9c05aa MCC	95	down, while 0xff indicates that no button is hold
4f9c05aa MCC	96	down. 0xfe sequences are sometimes interrupted by 0xFF */
e43f14af	97
a924a499	98	i2cdprintk("key %02x\n", b);
e43f14af	99
4f9c05aa	100	if (b == 0xff)
e43f14af MR	101	return 0;
e43f14af MR	102
4f9c05aa	103	if (b == 0xfe)
e43f14af MR	104	/* keep old data */
	105	return 1;
	106
	107	*ir_key = b;
	108	*ir_raw = b;
	109	return 1;
	110	}
	111
c8793b03	112	int em28xx_get_key_em_haup(struct IR_i2c ir, u32 ir_key, u32 *ir_raw)
d5e52653 MCC	113	{
d5e52653 MCC	114	unsigned char buf[2];
b779974b MCC	115	u16 code;
b779974b MCC	116	int size;
d5e52653 MCC	117
d5e52653 MCC	118	/* poll IR chip */
b779974b MCC	119	size = i2c_master_recv(ir->c, buf, sizeof(buf));
	120
	121	if (size != 2)
d5e52653 MCC	122	return -EIO;
	123
	124	/* Does eliminate repeated parity code */
6ea54d93	125	if (buf[1] == 0xff)
d5e52653 MCC	126	return 0;
d5e52653 MCC	127
6ea54d93	128	ir->old = buf[1];
d5e52653	129
b779974b MCC	130	/*
	131	* Rearranges bits to the right order.
	132	* The bit order were determined experimentally by using
	133	* The original Hauppauge Grey IR and another RC5 that uses addr=0x08
	134	* The RC5 code has 14 bits, but we've experimentally determined
	135	* the meaning for only 11 bits.
	136	* So, the code translation is not complete. Yet, it is enough to
	137	* work with the provided RC5 IR.
	138	*/
	139	code =
	140	((buf[0] & 0x01) ? 0x0020 : 0) \| /* 0010 0000 */
	141	((buf[0] & 0x02) ? 0x0010 : 0) \| /* 0001 0000 */
	142	((buf[0] & 0x04) ? 0x0008 : 0) \| /* 0000 1000 */
	143	((buf[0] & 0x08) ? 0x0004 : 0) \| /* 0000 0100 */
	144	((buf[0] & 0x10) ? 0x0002 : 0) \| /* 0000 0010 */
	145	((buf[0] & 0x20) ? 0x0001 : 0) \| /* 0000 0001 */
	146	((buf[1] & 0x08) ? 0x1000 : 0) \| /* 0001 0000 */
	147	((buf[1] & 0x10) ? 0x0800 : 0) \| /* 0000 1000 */
	148	((buf[1] & 0x20) ? 0x0400 : 0) \| /* 0000 0100 */
	149	((buf[1] & 0x40) ? 0x0200 : 0) \| /* 0000 0010 */
	150	((buf[1] & 0x80) ? 0x0100 : 0); /* 0000 0001 */
	151
	152	i2cdprintk("ir hauppauge (em2840): code=0x%02x (rcv=0x%02x%02x)\n",
	153	code, buf[1], buf[0]);
d5e52653 MCC	154
	155	/* return key */
	156	*ir_key = code;
	157	*ir_raw = code;
	158	return 1;
	159	}
	160
c8793b03 MCC	161	int em28xx_get_key_pinnacle_usb_grey(struct IR_i2c ir, u32 ir_key,
c8793b03 MCC	162	u32 *ir_raw)
366cc64b MR	163	{
	164	unsigned char buf[3];
	165
	166	/* poll IR chip */
	167
c668f32d	168	if (3 != i2c_master_recv(ir->c, buf, 3)) {
a924a499	169	i2cdprintk("read error\n");
366cc64b MR	170	return -EIO;
	171	}
	172
a924a499	173	i2cdprintk("key %02x\n", buf[2]&0x3f);
6ea54d93	174	if (buf[0] != 0x00)
366cc64b	175	return 0;
366cc64b MR	176
	177	*ir_key = buf[2]&0x3f;
	178	*ir_raw = buf[2]&0x3f;
	179
	180	return 1;
	181	}
	182
a924a499 MCC	183	/**********************************************************
	184	Poll based get keycode functions
	185	**********************************************************/
	186
4b92253a DH	187	/* This is for the em2860/em2880 */
	188	static int default_polling_getkey(struct em28xx_IR *ir,
	189	struct em28xx_ir_poll_result *poll_result)
a924a499 MCC	190	{
	191	struct em28xx *dev = ir->dev;
	192	int rc;
4b92253a	193	u8 msg[3] = { 0, 0, 0 };
a924a499	194
0a6b8a85 MCC	195	/* Read key toggle, brand, and key code
	196	on registers 0x45, 0x46 and 0x47
	197	*/
a924a499	198	rc = dev->em28xx_read_reg_req_len(dev, 0, EM28XX_R45_IR,
0a6b8a85	199	msg, sizeof(msg));
a924a499 MCC	200	if (rc < 0)
	201	return rc;
	202
4b92253a DH	203	/* Infrared toggle (Reg 0x45[7]) */
	204	poll_result->toggle_bit = (msg[0] >> 7);
	205
	206	/* Infrared read count (Reg 0x45[6:0] */
	207	poll_result->read_count = (msg[0] & 0x7f);
	208
	209	/* Remote Control Address (Reg 0x46) */
	210	poll_result->rc_address = msg[1];
	211
	212	/* Remote Control Data (Reg 0x47) */
	213	poll_result->rc_data[0] = msg[2];
	214
	215	return 0;
	216	}
	217
	218	static int em2874_polling_getkey(struct em28xx_IR *ir,
	219	struct em28xx_ir_poll_result *poll_result)
	220	{
	221	struct em28xx *dev = ir->dev;
	222	int rc;
	223	u8 msg[5] = { 0, 0, 0, 0, 0 };
	224
	225	/* Read key toggle, brand, and key code
	226	on registers 0x51-55
	227	*/
	228	rc = dev->em28xx_read_reg_req_len(dev, 0, EM2874_R51_IR,
	229	msg, sizeof(msg));
	230	if (rc < 0)
	231	return rc;
	232
	233	/* Infrared toggle (Reg 0x51[7]) */
	234	poll_result->toggle_bit = (msg[0] >> 7);
	235
	236	/* Infrared read count (Reg 0x51[6:0] */
	237	poll_result->read_count = (msg[0] & 0x7f);
	238
	239	/* Remote Control Address (Reg 0x52) */
	240	poll_result->rc_address = msg[1];
	241
	242	/* Remote Control Data (Reg 0x53-55) */
	243	poll_result->rc_data[0] = msg[2];
	244	poll_result->rc_data[1] = msg[3];
	245	poll_result->rc_data[2] = msg[4];
	246
	247	return 0;
a924a499 MCC	248	}
	249
	250	/**********************************************************
	251	Polling code for em28xx
	252	**********************************************************/
	253
	254	static void em28xx_ir_handle_key(struct em28xx_IR *ir)
	255	{
4b92253a DH	256	int result;
	257	int do_sendkey = 0;
	258	struct em28xx_ir_poll_result poll_result;
	259
	260	/* read the registers containing the IR status */
	261	result = ir->get_key(ir, &poll_result);
	262	if (result < 0) {
	263	dprintk("ir->get_key() failed %d\n", result);
a924a499	264	return;
4b92253a	265	}
a924a499	266
0278155c	267	dprintk("ir->get_key result tb=%02x rc=%02x lr=%02x data=%02x%02x\n",
4b92253a	268	poll_result.toggle_bit, poll_result.read_count,
0278155c MCC	269	ir->last_readcount, poll_result.rc_address,
0278155c MCC	270	poll_result.rc_data[0]);
4b92253a DH	271
	272	if (ir->dev->chip_id == CHIP_ID_EM2874) {
	273	/* The em2874 clears the readcount field every time the
	274	register is read. The em2860/2880 datasheet says that it
	275	is supposed to clear the readcount, but it doesn't. So with
	276	the em2874, we are looking for a non-zero read count as
	277	opposed to a readcount that is incrementing */
	278	ir->last_readcount = 0;
	279	}
0a6b8a85	280
4b92253a DH	281	if (poll_result.read_count == 0) {
	282	/* The button has not been pressed since the last read */
	283	} else if (ir->last_toggle != poll_result.toggle_bit) {
	284	/* A button has been pressed */
	285	dprintk("button has been pressed\n");
	286	ir->last_toggle = poll_result.toggle_bit;
	287	ir->repeat_interval = 0;
	288	do_sendkey = 1;
	289	} else if (poll_result.toggle_bit == ir->last_toggle &&
	290	poll_result.read_count > 0 &&
	291	poll_result.read_count != ir->last_readcount) {
	292	/* The button is still being held down */
	293	dprintk("button being held down\n");
	294
	295	/* Debouncer for first keypress */
	296	if (ir->repeat_interval++ > 9) {
	297	/* Start repeating after 1 second */
	298	do_sendkey = 1;
0a6b8a85	299	}
4b92253a DH	300	}
	301
	302	if (do_sendkey) {
	303	dprintk("sending keypress\n");
0278155c MCC	304
	305	if (ir->full_code)
	306	ir_input_keydown(ir->input, &ir->ir,
	307	poll_result.rc_address << 8 \|
	308	poll_result.rc_data[0]);
	309	else
	310	ir_input_keydown(ir->input, &ir->ir,
	311	poll_result.rc_data[0]);
	312
a924a499 MCC	313	ir_input_nokey(ir->input, &ir->ir);
a924a499 MCC	314	}
4b92253a DH	315
	316	ir->last_readcount = poll_result.read_count;
	317	return;
a924a499 MCC	318	}
a924a499 MCC	319
a924a499 MCC	320	static void em28xx_ir_work(struct work_struct *work)
a924a499 MCC	321	{
f263bac9	322	struct em28xx_IR *ir = container_of(work, struct em28xx_IR, work.work);
a924a499 MCC	323
a924a499 MCC	324	em28xx_ir_handle_key(ir);
f263bac9	325	schedule_delayed_work(&ir->work, msecs_to_jiffies(ir->polling));
a924a499 MCC	326	}
a924a499 MCC	327
26cdc76b	328	static void em28xx_ir_start(struct em28xx_IR *ir)
a924a499	329	{
f263bac9 JD	330	INIT_DELAYED_WORK(&ir->work, em28xx_ir_work);
f263bac9 JD	331	schedule_delayed_work(&ir->work, 0);
a924a499 MCC	332	}
	333
	334	static void em28xx_ir_stop(struct em28xx_IR *ir)
	335	{
f263bac9	336	cancel_delayed_work_sync(&ir->work);
a924a499 MCC	337	}
	338
	339	int em28xx_ir_init(struct em28xx *dev)
	340	{
	341	struct em28xx_IR *ir;
	342	struct input_dev *input_dev;
4b92253a	343	u8 ir_config;
a924a499 MCC	344	int err = -ENOMEM;
a924a499 MCC	345
505b6d0b	346	if (dev->board.ir_codes == NULL) {
4b92253a DH	347	/* No remote control support */
	348	return 0;
	349	}
	350
a924a499 MCC	351	ir = kzalloc(sizeof(*ir), GFP_KERNEL);
	352	input_dev = input_allocate_device();
	353	if (!ir \|\| !input_dev)
	354	goto err_out_free;
	355
	356	ir->input = input_dev;
1bad429e MCC	357	ir_config = EM2874_IR_RC5;
	358
	359	/* Adjust xclk based o IR table for RC5/NEC tables */
	360	if (dev->board.ir_codes->ir_type == IR_TYPE_RC5) {
	361	dev->board.xclk \|= EM28XX_XCLK_IR_RC5_MODE;
	362	ir->full_code = 1;
	363	} else if (dev->board.ir_codes->ir_type == IR_TYPE_NEC) {
	364	dev->board.xclk &= ~EM28XX_XCLK_IR_RC5_MODE;
	365	ir_config = EM2874_IR_NEC;
	366	ir->full_code = 1;
	367	}
	368	em28xx_write_reg_bits(dev, EM28XX_R0F_XCLK, dev->board.xclk,
	369	EM28XX_XCLK_IR_RC5_MODE);
a924a499	370
4b92253a DH	371	/* Setup the proper handler based on the chip */
	372	switch (dev->chip_id) {
	373	case CHIP_ID_EM2860:
	374	case CHIP_ID_EM2883:
	375	ir->get_key = default_polling_getkey;
91812fa7	376	break;
4b92253a DH	377	case CHIP_ID_EM2874:
4b92253a DH	378	ir->get_key = em2874_polling_getkey;
4b92253a DH	379	em28xx_write_regs(dev, EM2874_R50_IR_CONFIG, &ir_config, 1);
	380	break;
	381	default:
	382	printk("Unrecognized em28xx chip id: IR not supported\n");
a924a499 MCC	383	goto err_out_free;
	384	}
	385
4b92253a DH	386	/* This is how often we ask the chip for IR information */
	387	ir->polling = 100; /* ms */
	388
a924a499 MCC	389	/* init input device */
	390	snprintf(ir->name, sizeof(ir->name), "em28xx IR (%s)",
	391	dev->name);
	392
	393	usb_make_path(dev->udev, ir->phys, sizeof(ir->phys));
	394	strlcat(ir->phys, "/input0", sizeof(ir->phys));
	395
579e7d60	396	err = ir_input_init(input_dev, &ir->ir, IR_TYPE_OTHER);
055cd556 MCC	397	if (err < 0)
	398	goto err_out_free;
	399
a924a499 MCC	400	input_dev->name = ir->name;
	401	input_dev->phys = ir->phys;
	402	input_dev->id.bustype = BUS_USB;
	403	input_dev->id.version = 1;
	404	input_dev->id.vendor = le16_to_cpu(dev->udev->descriptor.idVendor);
	405	input_dev->id.product = le16_to_cpu(dev->udev->descriptor.idProduct);
	406
	407	input_dev->dev.parent = &dev->udev->dev;
	408	/* record handles to ourself */
	409	ir->dev = dev;
	410	dev->ir = ir;
	411
	412	em28xx_ir_start(ir);
	413
	414	/* all done */
579e7d60	415	err = ir_input_register(ir->input, dev->board.ir_codes);
a924a499 MCC	416	if (err)
	417	goto err_out_stop;
	418
	419	return 0;
	420	err_out_stop:
	421	em28xx_ir_stop(ir);
	422	dev->ir = NULL;
	423	err_out_free:
a924a499 MCC	424	kfree(ir);
	425	return err;
	426	}
	427
	428	int em28xx_ir_fini(struct em28xx *dev)
	429	{
	430	struct em28xx_IR *ir = dev->ir;
	431
	432	/* skip detach on non attached boards */
	433	if (!ir)
	434	return 0;
	435
	436	em28xx_ir_stop(ir);
38ef6aa8	437	ir_input_unregister(ir->input);
a924a499 MCC	438	kfree(ir);
	439
	440	/* done */
	441	dev->ir = NULL;
	442	return 0;
	443	}
	444
	445	/**********************************************************
	446	Handle Webcam snapshot button
	447	**********************************************************/
	448
a9fc52bc DH	449	static void em28xx_query_sbutton(struct work_struct *work)
	450	{
	451	/* Poll the register and see if the button is depressed */
	452	struct em28xx *dev =
	453	container_of(work, struct em28xx, sbutton_query_work.work);
	454	int ret;
	455
	456	ret = em28xx_read_reg(dev, EM28XX_R0C_USBSUSP);
	457
	458	if (ret & EM28XX_R0C_USBSUSP_SNAPSHOT) {
	459	u8 cleared;
	460	/* Button is depressed, clear the register */
	461	cleared = ((u8) ret) & ~EM28XX_R0C_USBSUSP_SNAPSHOT;
	462	em28xx_write_regs(dev, EM28XX_R0C_USBSUSP, &cleared, 1);
	463
	464	/* Not emulate the keypress */
	465	input_report_key(dev->sbutton_input_dev, EM28XX_SNAPSHOT_KEY,
	466	1);
	467	/* Now unpress the key */
	468	input_report_key(dev->sbutton_input_dev, EM28XX_SNAPSHOT_KEY,
	469	0);
	470	}
	471
	472	/* Schedule next poll */
	473	schedule_delayed_work(&dev->sbutton_query_work,
	474	msecs_to_jiffies(EM28XX_SBUTTON_QUERY_INTERVAL));
	475	}
	476
	477	void em28xx_register_snapshot_button(struct em28xx *dev)
	478	{
	479	struct input_dev *input_dev;
	480	int err;
	481
	482	em28xx_info("Registering snapshot button...\n");
	483	input_dev = input_allocate_device();
	484	if (!input_dev) {
	485	em28xx_errdev("input_allocate_device failed\n");
	486	return;
	487	}
	488
	489	usb_make_path(dev->udev, dev->snapshot_button_path,
	490	sizeof(dev->snapshot_button_path));
	491	strlcat(dev->snapshot_button_path, "/sbutton",
	492	sizeof(dev->snapshot_button_path));
	493	INIT_DELAYED_WORK(&dev->sbutton_query_work, em28xx_query_sbutton);
	494
	495	input_dev->name = "em28xx snapshot button";
	496	input_dev->phys = dev->snapshot_button_path;
	497	input_dev->evbit[0] = BIT_MASK(EV_KEY) \| BIT_MASK(EV_REP);
	498	set_bit(EM28XX_SNAPSHOT_KEY, input_dev->keybit);
	499	input_dev->keycodesize = 0;
	500	input_dev->keycodemax = 0;
	501	input_dev->id.bustype = BUS_USB;
	502	input_dev->id.vendor = le16_to_cpu(dev->udev->descriptor.idVendor);
	503	input_dev->id.product = le16_to_cpu(dev->udev->descriptor.idProduct);
	504	input_dev->id.version = 1;
	505	input_dev->dev.parent = &dev->udev->dev;
	506
	507	err = input_register_device(input_dev);
	508	if (err) {
	509	em28xx_errdev("input_register_device failed\n");
	510	input_free_device(input_dev);
	511	return;
	512	}
513
514	dev->sbutton_input_dev = input_dev;
515	schedule_delayed_work(&dev->sbutton_query_work,
516	msecs_to_jiffies(EM28XX_SBUTTON_QUERY_INTERVAL));
517	return;
518
519	}
520
521	void em28xx_deregister_snapshot_button(struct em28xx *dev)
522	{
523	if (dev->sbutton_input_dev != NULL) {
524	em28xx_info("Deregistering snapshot button\n");
525	cancel_rearming_delayed_work(&dev->sbutton_query_work);
526	input_unregister_device(dev->sbutton_input_dev);
527	dev->sbutton_input_dev = NULL;
528	}
529	return;
530	}