[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 <linux/slab.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 MODULE_NAME "em28xx"

#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;
	char name[32];
	char phys[32];

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

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

	/* IR device properties */

	struct ir_dev_props props;
};

/**********************************************************
 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;
}

int em28xx_get_key_winfast_usbii_deluxe(struct IR_i2c *ir, u32 *ir_key, u32 *ir_raw)
{
	unsigned char subaddr, keydetect, key;

	struct i2c_msg msg[] = { { .addr = ir->c->addr, .flags = 0, .buf = &subaddr, .len = 1},

				{ .addr = ir->c->addr, .flags = I2C_M_RD, .buf = &keydetect, .len = 1} };

	subaddr = 0x10;
	if (2 != i2c_transfer(ir->c->adapter, msg, 2)) {
		i2cdprintk("read error\n");
		return -EIO;
	}
	if (keydetect == 0x00)
		return 0;

	subaddr = 0x00;
	msg[1].buf = &key;
	if (2 != i2c_transfer(ir->c->adapter, msg, 2)) {
		i2cdprintk("read error\n");
	return -EIO;
	}
	if (key == 0x00)
		return 0;

	*ir_key = key;
	*ir_raw = key;
	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;
	struct em28xx_ir_poll_result poll_result;

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

	if (unlikely(poll_result.read_count != ir->last_readcount)) {
		dprintk("%s: toggle: %d, count: %d, key 0x%02x%02x\n", __func__,
			poll_result.toggle_bit, poll_result.read_count,
			poll_result.rc_address, poll_result.rc_data[0]);
		if (ir->full_code)
			ir_keydown(ir->input,
				   poll_result.rc_address << 8 |
				   poll_result.rc_data[0],
				   poll_result.toggle_bit);
		else
			ir_keydown(ir->input,
				   poll_result.rc_data[0],
				   poll_result.toggle_bit);

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

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 int em28xx_ir_start(void *priv)
{
	struct em28xx_IR *ir = priv;

	INIT_DELAYED_WORK(&ir->work, em28xx_ir_work);
	schedule_delayed_work(&ir->work, 0);

	return 0;
}

static void em28xx_ir_stop(void *priv)
{
	struct em28xx_IR *ir = priv;

	cancel_delayed_work_sync(&ir->work);
}

int em28xx_ir_change_protocol(void *priv, u64 ir_type)
{
	int rc = 0;
	struct em28xx_IR *ir = priv;
	struct em28xx *dev = ir->dev;
	u8 ir_config = EM2874_IR_RC5;

	/* Adjust xclk based o IR table for RC5/NEC tables */

	if (ir_type == IR_TYPE_RC5) {
		dev->board.xclk |= EM28XX_XCLK_IR_RC5_MODE;
		ir->full_code = 1;
	} else if (ir_type == IR_TYPE_NEC) {
		dev->board.xclk &= ~EM28XX_XCLK_IR_RC5_MODE;
		ir_config = EM2874_IR_NEC;
		ir->full_code = 1;
	} else if (ir_type != IR_TYPE_UNKNOWN)
		rc = -EINVAL;

	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");
		rc = -EINVAL;
	}

	return rc;
}

int em28xx_ir_init(struct em28xx *dev)
{
	struct em28xx_IR *ir;
	struct input_dev *input_dev;
	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;

	/* record handles to ourself */
	ir->dev = dev;
	dev->ir = ir;

	ir->input = input_dev;

	/*
	 * em2874 supports more protocols. For now, let's just announce
	 * the two protocols that were already tested
	 */
	ir->props.allowed_protos = IR_TYPE_RC5 | IR_TYPE_NEC;
	ir->props.priv = ir;
	ir->props.change_protocol = em28xx_ir_change_protocol;
	ir->props.open = em28xx_ir_start;
	ir->props.close = em28xx_ir_stop;

	/* By default, keep protocol field untouched */
	err = em28xx_ir_change_protocol(ir, IR_TYPE_UNKNOWN);
	if (err)
		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));

	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;


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

	return 0;
 err_out_stop:
	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>
5a0e3ad6	30	#include <linux/slab.h>
d5e52653	31
f7abcd38	32	#include "em28xx.h"
d5e52653	33
a9fc52bc DH	34	#define EM28XX_SNAPSHOT_KEY KEY_CAMERA
	35	#define EM28XX_SBUTTON_QUERY_INTERVAL 500
	36	#define EM28XX_R0C_USBSUSP_SNAPSHOT 0x20
	37
c8793b03	38	static unsigned int ir_debug;
d5e52653	39	module_param(ir_debug, int, 0644);
6ea54d93	40	MODULE_PARM_DESC(ir_debug, "enable debug messages [IR]");
d5e52653	41
727e625c MCC	42	#define MODULE_NAME "em28xx"
727e625c MCC	43
a924a499	44	#define i2cdprintk(fmt, arg...) \
6ea54d93	45	if (ir_debug) { \
1df8e986	46	printk(KERN_DEBUG "%s/ir: " fmt, ir->name , ## arg); \
6ea54d93	47	}
d5e52653	48
a924a499 MCC	49	#define dprintk(fmt, arg...) \
	50	if (ir_debug) { \
	51	printk(KERN_DEBUG "%s/ir: " fmt, ir->name , ## arg); \
	52	}
	53
	54	/**********************************************************
	55	Polling structure used by em28xx IR's
	56	**********************************************************/
	57
4b92253a DH	58	struct em28xx_ir_poll_result {
	59	unsigned int toggle_bit:1;
	60	unsigned int read_count:7;
	61	u8 rc_address;
	62	u8 rc_data[4]; /* 1 byte on em2860/2880, 4 on em2874 */
	63	};
	64
a924a499 MCC	65	struct em28xx_IR {
	66	struct em28xx *dev;
	67	struct input_dev *input;
a924a499 MCC	68	char name[32];
	69	char phys[32];
	70
	71	/* poll external decoder */
	72	int polling;
f263bac9	73	struct delayed_work work;
0278155c	74	unsigned int full_code:1;
4b92253a	75	unsigned int last_readcount;
a924a499	76
4b92253a	77	int (get_key)(struct em28xx_IR , struct em28xx_ir_poll_result *);
950b0f5a MCC	78
	79	/* IR device properties */
	80
	81	struct ir_dev_props props;
a924a499 MCC	82	};
	83
	84	/**********************************************************
	85	I2C IR based get keycodes - should be used with ir-kbd-i2c
	86	**********************************************************/
d5e52653	87
c8793b03	88	int em28xx_get_key_terratec(struct IR_i2c ir, u32 ir_key, u32 *ir_raw)
e43f14af MR	89	{
	90	unsigned char b;
	91
	92	/* poll IR chip */
c668f32d	93	if (1 != i2c_master_recv(ir->c, &b, 1)) {
a924a499	94	i2cdprintk("read error\n");
e43f14af MR	95	return -EIO;
	96	}
	97
	98	/* it seems that 0xFE indicates that a button is still hold
4f9c05aa MCC	99	down, while 0xff indicates that no button is hold
4f9c05aa MCC	100	down. 0xfe sequences are sometimes interrupted by 0xFF */
e43f14af	101
a924a499	102	i2cdprintk("key %02x\n", b);
e43f14af	103
4f9c05aa	104	if (b == 0xff)
e43f14af MR	105	return 0;
e43f14af MR	106
4f9c05aa	107	if (b == 0xfe)
e43f14af MR	108	/* keep old data */
	109	return 1;
	110
	111	*ir_key = b;
	112	*ir_raw = b;
	113	return 1;
	114	}
	115
c8793b03	116	int em28xx_get_key_em_haup(struct IR_i2c ir, u32 ir_key, u32 *ir_raw)
d5e52653 MCC	117	{
d5e52653 MCC	118	unsigned char buf[2];
b779974b MCC	119	u16 code;
b779974b MCC	120	int size;
d5e52653 MCC	121
d5e52653 MCC	122	/* poll IR chip */
b779974b MCC	123	size = i2c_master_recv(ir->c, buf, sizeof(buf));
	124
	125	if (size != 2)
d5e52653 MCC	126	return -EIO;
	127
	128	/* Does eliminate repeated parity code */
6ea54d93	129	if (buf[1] == 0xff)
d5e52653 MCC	130	return 0;
d5e52653 MCC	131
6ea54d93	132	ir->old = buf[1];
d5e52653	133
b779974b MCC	134	/*
	135	* Rearranges bits to the right order.
	136	* The bit order were determined experimentally by using
	137	* The original Hauppauge Grey IR and another RC5 that uses addr=0x08
	138	* The RC5 code has 14 bits, but we've experimentally determined
	139	* the meaning for only 11 bits.
	140	* So, the code translation is not complete. Yet, it is enough to
	141	* work with the provided RC5 IR.
	142	*/
	143	code =
	144	((buf[0] & 0x01) ? 0x0020 : 0) \| /* 0010 0000 */
	145	((buf[0] & 0x02) ? 0x0010 : 0) \| /* 0001 0000 */
	146	((buf[0] & 0x04) ? 0x0008 : 0) \| /* 0000 1000 */
	147	((buf[0] & 0x08) ? 0x0004 : 0) \| /* 0000 0100 */
	148	((buf[0] & 0x10) ? 0x0002 : 0) \| /* 0000 0010 */
	149	((buf[0] & 0x20) ? 0x0001 : 0) \| /* 0000 0001 */
	150	((buf[1] & 0x08) ? 0x1000 : 0) \| /* 0001 0000 */
	151	((buf[1] & 0x10) ? 0x0800 : 0) \| /* 0000 1000 */
	152	((buf[1] & 0x20) ? 0x0400 : 0) \| /* 0000 0100 */
	153	((buf[1] & 0x40) ? 0x0200 : 0) \| /* 0000 0010 */
	154	((buf[1] & 0x80) ? 0x0100 : 0); /* 0000 0001 */
	155
	156	i2cdprintk("ir hauppauge (em2840): code=0x%02x (rcv=0x%02x%02x)\n",
	157	code, buf[1], buf[0]);
d5e52653 MCC	158
	159	/* return key */
	160	*ir_key = code;
	161	*ir_raw = code;
	162	return 1;
	163	}
	164
c8793b03 MCC	165	int em28xx_get_key_pinnacle_usb_grey(struct IR_i2c ir, u32 ir_key,
c8793b03 MCC	166	u32 *ir_raw)
366cc64b MR	167	{
	168	unsigned char buf[3];
	169
	170	/* poll IR chip */
	171
c668f32d	172	if (3 != i2c_master_recv(ir->c, buf, 3)) {
a924a499	173	i2cdprintk("read error\n");
366cc64b MR	174	return -EIO;
	175	}
	176
a924a499	177	i2cdprintk("key %02x\n", buf[2]&0x3f);
6ea54d93	178	if (buf[0] != 0x00)
366cc64b	179	return 0;
366cc64b MR	180
	181	*ir_key = buf[2]&0x3f;
	182	*ir_raw = buf[2]&0x3f;
	183
	184	return 1;
	185	}
	186
ca39d84d MA	187	int em28xx_get_key_winfast_usbii_deluxe(struct IR_i2c ir, u32 ir_key, u32 *ir_raw)
	188	{
	189	unsigned char subaddr, keydetect, key;
	190
	191	struct i2c_msg msg[] = { { .addr = ir->c->addr, .flags = 0, .buf = &subaddr, .len = 1},
	192
	193	{ .addr = ir->c->addr, .flags = I2C_M_RD, .buf = &keydetect, .len = 1} };
	194
	195	subaddr = 0x10;
	196	if (2 != i2c_transfer(ir->c->adapter, msg, 2)) {
	197	i2cdprintk("read error\n");
	198	return -EIO;
	199	}
	200	if (keydetect == 0x00)
	201	return 0;
	202
	203	subaddr = 0x00;
	204	msg[1].buf = &key;
	205	if (2 != i2c_transfer(ir->c->adapter, msg, 2)) {
	206	i2cdprintk("read error\n");
	207	return -EIO;
	208	}
	209	if (key == 0x00)
	210	return 0;
	211
	212	*ir_key = key;
	213	*ir_raw = key;
	214	return 1;
	215	}
	216
a924a499 MCC	217	/**********************************************************
	218	Poll based get keycode functions
	219	**********************************************************/
	220
4b92253a DH	221	/* This is for the em2860/em2880 */
	222	static int default_polling_getkey(struct em28xx_IR *ir,
	223	struct em28xx_ir_poll_result *poll_result)
a924a499 MCC	224	{
	225	struct em28xx *dev = ir->dev;
	226	int rc;
4b92253a	227	u8 msg[3] = { 0, 0, 0 };
a924a499	228
0a6b8a85 MCC	229	/* Read key toggle, brand, and key code
	230	on registers 0x45, 0x46 and 0x47
	231	*/
a924a499	232	rc = dev->em28xx_read_reg_req_len(dev, 0, EM28XX_R45_IR,
0a6b8a85	233	msg, sizeof(msg));
a924a499 MCC	234	if (rc < 0)
	235	return rc;
	236
4b92253a DH	237	/* Infrared toggle (Reg 0x45[7]) */
	238	poll_result->toggle_bit = (msg[0] >> 7);
	239
	240	/* Infrared read count (Reg 0x45[6:0] */
	241	poll_result->read_count = (msg[0] & 0x7f);
	242
	243	/* Remote Control Address (Reg 0x46) */
	244	poll_result->rc_address = msg[1];
	245
	246	/* Remote Control Data (Reg 0x47) */
	247	poll_result->rc_data[0] = msg[2];
	248
	249	return 0;
	250	}
	251
	252	static int em2874_polling_getkey(struct em28xx_IR *ir,
	253	struct em28xx_ir_poll_result *poll_result)
	254	{
	255	struct em28xx *dev = ir->dev;
	256	int rc;
	257	u8 msg[5] = { 0, 0, 0, 0, 0 };
	258
	259	/* Read key toggle, brand, and key code
	260	on registers 0x51-55
	261	*/
	262	rc = dev->em28xx_read_reg_req_len(dev, 0, EM2874_R51_IR,
	263	msg, sizeof(msg));
	264	if (rc < 0)
	265	return rc;
	266
	267	/* Infrared toggle (Reg 0x51[7]) */
	268	poll_result->toggle_bit = (msg[0] >> 7);
	269
	270	/* Infrared read count (Reg 0x51[6:0] */
	271	poll_result->read_count = (msg[0] & 0x7f);
	272
	273	/* Remote Control Address (Reg 0x52) */
	274	poll_result->rc_address = msg[1];
	275
	276	/* Remote Control Data (Reg 0x53-55) */
	277	poll_result->rc_data[0] = msg[2];
	278	poll_result->rc_data[1] = msg[3];
	279	poll_result->rc_data[2] = msg[4];
	280
	281	return 0;
a924a499 MCC	282	}
	283
	284	/**********************************************************
	285	Polling code for em28xx
	286	**********************************************************/
	287
	288	static void em28xx_ir_handle_key(struct em28xx_IR *ir)
	289	{
4b92253a	290	int result;
4b92253a DH	291	struct em28xx_ir_poll_result poll_result;
	292
	293	/* read the registers containing the IR status */
	294	result = ir->get_key(ir, &poll_result);
603044d8	295	if (unlikely(result < 0)) {
4b92253a	296	dprintk("ir->get_key() failed %d\n", result);
a924a499	297	return;
4b92253a	298	}
a924a499	299
603044d8 MCC	300	if (unlikely(poll_result.read_count != ir->last_readcount)) {
	301	dprintk("%s: toggle: %d, count: %d, key 0x%02x%02x\n", __func__,
	302	poll_result.toggle_bit, poll_result.read_count,
	303	poll_result.rc_address, poll_result.rc_data[0]);
a469585b DH	304	if (ir->full_code)
	305	ir_keydown(ir->input,
	306	poll_result.rc_address << 8 \|
	307	poll_result.rc_data[0],
	308	poll_result.toggle_bit);
	309	else
	310	ir_keydown(ir->input,
	311	poll_result.rc_data[0],
	312	poll_result.toggle_bit);
a469585b	313
603044d8 MCC	314	if (ir->dev->chip_id == CHIP_ID_EM2874)
	315	/* The em2874 clears the readcount field every time the
	316	register is read. The em2860/2880 datasheet says that it
	317	is supposed to clear the readcount, but it doesn't. So with
	318	the em2874, we are looking for a non-zero read count as
	319	opposed to a readcount that is incrementing */
	320	ir->last_readcount = 0;
	321	else
	322	ir->last_readcount = poll_result.read_count;
	323	}
a924a499 MCC	324	}
a924a499 MCC	325
a924a499 MCC	326	static void em28xx_ir_work(struct work_struct *work)
a924a499 MCC	327	{
f263bac9	328	struct em28xx_IR *ir = container_of(work, struct em28xx_IR, work.work);
a924a499 MCC	329
a924a499 MCC	330	em28xx_ir_handle_key(ir);
f263bac9	331	schedule_delayed_work(&ir->work, msecs_to_jiffies(ir->polling));
a924a499 MCC	332	}
a924a499 MCC	333
c373cabf	334	static int em28xx_ir_start(void *priv)
a924a499	335	{
c373cabf MCC	336	struct em28xx_IR *ir = priv;
c373cabf MCC	337
f263bac9 JD	338	INIT_DELAYED_WORK(&ir->work, em28xx_ir_work);
f263bac9 JD	339	schedule_delayed_work(&ir->work, 0);
c373cabf MCC	340
c373cabf MCC	341	return 0;
a924a499 MCC	342	}
a924a499 MCC	343
c373cabf	344	static void em28xx_ir_stop(void *priv)
a924a499	345	{
c373cabf MCC	346	struct em28xx_IR *ir = priv;
c373cabf MCC	347
f263bac9	348	cancel_delayed_work_sync(&ir->work);
a924a499 MCC	349	}
a924a499 MCC	350
971e8298	351	int em28xx_ir_change_protocol(void *priv, u64 ir_type)
a924a499	352	{
950b0f5a MCC	353	int rc = 0;
	354	struct em28xx_IR *ir = priv;
	355	struct em28xx *dev = ir->dev;
	356	u8 ir_config = EM2874_IR_RC5;
1bad429e MCC	357
1bad429e MCC	358	/* Adjust xclk based o IR table for RC5/NEC tables */
950b0f5a MCC	359
950b0f5a MCC	360	if (ir_type == IR_TYPE_RC5) {
1bad429e MCC	361	dev->board.xclk \|= EM28XX_XCLK_IR_RC5_MODE;
1bad429e MCC	362	ir->full_code = 1;
950b0f5a	363	} else if (ir_type == IR_TYPE_NEC) {
1bad429e MCC	364	dev->board.xclk &= ~EM28XX_XCLK_IR_RC5_MODE;
	365	ir_config = EM2874_IR_NEC;
	366	ir->full_code = 1;
c373cabf	367	} else if (ir_type != IR_TYPE_UNKNOWN)
950b0f5a MCC	368	rc = -EINVAL;
950b0f5a MCC	369
1bad429e MCC	370	em28xx_write_reg_bits(dev, EM28XX_R0F_XCLK, dev->board.xclk,
1bad429e MCC	371	EM28XX_XCLK_IR_RC5_MODE);
a924a499	372
4b92253a DH	373	/* Setup the proper handler based on the chip */
	374	switch (dev->chip_id) {
	375	case CHIP_ID_EM2860:
	376	case CHIP_ID_EM2883:
	377	ir->get_key = default_polling_getkey;
91812fa7	378	break;
4b92253a DH	379	case CHIP_ID_EM2874:
4b92253a DH	380	ir->get_key = em2874_polling_getkey;
4b92253a DH	381	em28xx_write_regs(dev, EM2874_R50_IR_CONFIG, &ir_config, 1);
	382	break;
	383	default:
	384	printk("Unrecognized em28xx chip id: IR not supported\n");
950b0f5a MCC	385	rc = -EINVAL;
	386	}
	387
	388	return rc;
	389	}
	390
	391	int em28xx_ir_init(struct em28xx *dev)
	392	{
	393	struct em28xx_IR *ir;
	394	struct input_dev *input_dev;
	395	int err = -ENOMEM;
	396
	397	if (dev->board.ir_codes == NULL) {
	398	/* No remote control support */
	399	return 0;
a924a499 MCC	400	}
a924a499 MCC	401
950b0f5a MCC	402	ir = kzalloc(sizeof(*ir), GFP_KERNEL);
	403	input_dev = input_allocate_device();
	404	if (!ir \|\| !input_dev)
	405	goto err_out_free;
	406
	407	/* record handles to ourself */
	408	ir->dev = dev;
	409	dev->ir = ir;
	410
	411	ir->input = input_dev;
	412
	413	/*
	414	* em2874 supports more protocols. For now, let's just announce
	415	* the two protocols that were already tested
	416	*/
	417	ir->props.allowed_protos = IR_TYPE_RC5 \| IR_TYPE_NEC;
	418	ir->props.priv = ir;
	419	ir->props.change_protocol = em28xx_ir_change_protocol;
c373cabf MCC	420	ir->props.open = em28xx_ir_start;
	421	ir->props.close = em28xx_ir_stop;
	422
	423	/* By default, keep protocol field untouched */
	424	err = em28xx_ir_change_protocol(ir, IR_TYPE_UNKNOWN);
	425	if (err)
	426	goto err_out_free;
950b0f5a	427
4b92253a DH	428	/* This is how often we ask the chip for IR information */
	429	ir->polling = 100; /* ms */
	430
a924a499 MCC	431	/* init input device */
	432	snprintf(ir->name, sizeof(ir->name), "em28xx IR (%s)",
	433	dev->name);
	434
	435	usb_make_path(dev->udev, ir->phys, sizeof(ir->phys));
	436	strlcat(ir->phys, "/input0", sizeof(ir->phys));
	437
a924a499 MCC	438	input_dev->name = ir->name;
	439	input_dev->phys = ir->phys;
	440	input_dev->id.bustype = BUS_USB;
	441	input_dev->id.version = 1;
	442	input_dev->id.vendor = le16_to_cpu(dev->udev->descriptor.idVendor);
	443	input_dev->id.product = le16_to_cpu(dev->udev->descriptor.idProduct);
	444
	445	input_dev->dev.parent = &dev->udev->dev;
950b0f5a	446
a924a499	447
a924a499 MCC	448
a924a499 MCC	449	/* all done */
02858eed	450	err = ir_input_register(ir->input, dev->board.ir_codes,
727e625c	451	&ir->props, MODULE_NAME);
a924a499 MCC	452	if (err)
	453	goto err_out_stop;
	454
	455	return 0;
	456	err_out_stop:
a924a499 MCC	457	dev->ir = NULL;
a924a499 MCC	458	err_out_free:
a924a499 MCC	459	kfree(ir);
	460	return err;
	461	}
	462
	463	int em28xx_ir_fini(struct em28xx *dev)
	464	{
	465	struct em28xx_IR *ir = dev->ir;
	466
	467	/* skip detach on non attached boards */
	468	if (!ir)
	469	return 0;
	470
	471	em28xx_ir_stop(ir);
38ef6aa8	472	ir_input_unregister(ir->input);
a924a499 MCC	473	kfree(ir);
	474
	475	/* done */
	476	dev->ir = NULL;
	477	return 0;
	478	}
	479
	480	/**********************************************************
	481	Handle Webcam snapshot button
	482	**********************************************************/
	483
a9fc52bc DH	484	static void em28xx_query_sbutton(struct work_struct *work)
	485	{
	486	/* Poll the register and see if the button is depressed */
	487	struct em28xx *dev =
	488	container_of(work, struct em28xx, sbutton_query_work.work);
	489	int ret;
	490
	491	ret = em28xx_read_reg(dev, EM28XX_R0C_USBSUSP);
	492
	493	if (ret & EM28XX_R0C_USBSUSP_SNAPSHOT) {
	494	u8 cleared;
	495	/* Button is depressed, clear the register */
	496	cleared = ((u8) ret) & ~EM28XX_R0C_USBSUSP_SNAPSHOT;
	497	em28xx_write_regs(dev, EM28XX_R0C_USBSUSP, &cleared, 1);
	498
	499	/* Not emulate the keypress */
	500	input_report_key(dev->sbutton_input_dev, EM28XX_SNAPSHOT_KEY,
	501	1);
	502	/* Now unpress the key */
	503	input_report_key(dev->sbutton_input_dev, EM28XX_SNAPSHOT_KEY,
	504	0);
	505	}
	506
	507	/* Schedule next poll */
	508	schedule_delayed_work(&dev->sbutton_query_work,
	509	msecs_to_jiffies(EM28XX_SBUTTON_QUERY_INTERVAL));
	510	}
	511
	512	void em28xx_register_snapshot_button(struct em28xx *dev)
	513	{
	514	struct input_dev *input_dev;
	515	int err;
	516
	517	em28xx_info("Registering snapshot button...\n");
	518	input_dev = input_allocate_device();
	519	if (!input_dev) {
	520	em28xx_errdev("input_allocate_device failed\n");
	521	return;
	522	}
	523
	524	usb_make_path(dev->udev, dev->snapshot_button_path,
	525	sizeof(dev->snapshot_button_path));
	526	strlcat(dev->snapshot_button_path, "/sbutton",
	527	sizeof(dev->snapshot_button_path));
	528	INIT_DELAYED_WORK(&dev->sbutton_query_work, em28xx_query_sbutton);
	529
	530	input_dev->name = "em28xx snapshot button";
	531	input_dev->phys = dev->snapshot_button_path;
	532	input_dev->evbit[0] = BIT_MASK(EV_KEY) \| BIT_MASK(EV_REP);
	533	set_bit(EM28XX_SNAPSHOT_KEY, input_dev->keybit);
	534	input_dev->keycodesize = 0;
	535	input_dev->keycodemax = 0;
	536	input_dev->id.bustype = BUS_USB;
	537	input_dev->id.vendor = le16_to_cpu(dev->udev->descriptor.idVendor);
	538	input_dev->id.product = le16_to_cpu(dev->udev->descriptor.idProduct);
	539	input_dev->id.version = 1;
	540	input_dev->dev.parent = &dev->udev->dev;
	541
	542	err = input_register_device(input_dev);
	543	if (err) {
	544	em28xx_errdev("input_register_device failed\n");
	545	input_free_device(input_dev);
	546	return;
	547	}
548
549	dev->sbutton_input_dev = input_dev;
550	schedule_delayed_work(&dev->sbutton_query_work,
551	msecs_to_jiffies(EM28XX_SBUTTON_QUERY_INTERVAL));
552	return;
553
554	}
555
556	void em28xx_deregister_snapshot_button(struct em28xx *dev)
557	{
558	if (dev->sbutton_input_dev != NULL) {
559	em28xx_info("Deregistering snapshot button\n");
560	cancel_rearming_delayed_work(&dev->sbutton_query_work);
561	input_unregister_device(dev->sbutton_input_dev);
562	dev->sbutton_input_dev = NULL;
563	}
564	return;
565	}