[mirror_ubuntu-artful-kernel.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 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 *);

	/* 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;
	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_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 */

	dev->board.ir_codes->ir_type = IR_TYPE_OTHER;
	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
		rc = -EINVAL;

	dev->board.ir_codes->ir_type = ir_type;

	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;

	/* 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));

	/* Set IR protocol */
	em28xx_ir_change_protocol(ir, dev->board.ir_codes->ir_type);
	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;


	em28xx_ir_start(ir);

	/* all done */
	err = ir_input_register(ir->input, dev->board.ir_codes,
				&ir->props);
	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>
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
a924a499	42	#define i2cdprintk(fmt, arg...) \
6ea54d93	43	if (ir_debug) { \
1df8e986	44	printk(KERN_DEBUG "%s/ir: " fmt, ir->name , ## arg); \
6ea54d93	45	}
d5e52653	46
a924a499 MCC	47	#define dprintk(fmt, arg...) \
	48	if (ir_debug) { \
	49	printk(KERN_DEBUG "%s/ir: " fmt, ir->name , ## arg); \
	50	}
	51
	52	/**********************************************************
	53	Polling structure used by em28xx IR's
	54	**********************************************************/
	55
4b92253a DH	56	struct em28xx_ir_poll_result {
	57	unsigned int toggle_bit:1;
	58	unsigned int read_count:7;
	59	u8 rc_address;
	60	u8 rc_data[4]; /* 1 byte on em2860/2880, 4 on em2874 */
	61	};
	62
a924a499 MCC	63	struct em28xx_IR {
	64	struct em28xx *dev;
	65	struct input_dev *input;
	66	struct ir_input_state ir;
	67	char name[32];
	68	char phys[32];
	69
	70	/* poll external decoder */
	71	int polling;
f263bac9	72	struct delayed_work work;
4b92253a	73	unsigned int last_toggle:1;
0278155c	74	unsigned int full_code:1;
4b92253a DH	75	unsigned int last_readcount;
4b92253a DH	76	unsigned int repeat_interval;
a924a499	77
4b92253a	78	int (get_key)(struct em28xx_IR , struct em28xx_ir_poll_result *);
950b0f5a MCC	79
	80	/* IR device properties */
	81
	82	struct ir_dev_props props;
a924a499 MCC	83	};
	84
	85	/**********************************************************
	86	I2C IR based get keycodes - should be used with ir-kbd-i2c
	87	**********************************************************/
d5e52653	88
c8793b03	89	int em28xx_get_key_terratec(struct IR_i2c ir, u32 ir_key, u32 *ir_raw)
e43f14af MR	90	{
	91	unsigned char b;
	92
	93	/* poll IR chip */
c668f32d	94	if (1 != i2c_master_recv(ir->c, &b, 1)) {
a924a499	95	i2cdprintk("read error\n");
e43f14af MR	96	return -EIO;
	97	}
	98
	99	/* it seems that 0xFE indicates that a button is still hold
4f9c05aa MCC	100	down, while 0xff indicates that no button is hold
4f9c05aa MCC	101	down. 0xfe sequences are sometimes interrupted by 0xFF */
e43f14af	102
a924a499	103	i2cdprintk("key %02x\n", b);
e43f14af	104
4f9c05aa	105	if (b == 0xff)
e43f14af MR	106	return 0;
e43f14af MR	107
4f9c05aa	108	if (b == 0xfe)
e43f14af MR	109	/* keep old data */
	110	return 1;
	111
	112	*ir_key = b;
	113	*ir_raw = b;
	114	return 1;
	115	}
	116
c8793b03	117	int em28xx_get_key_em_haup(struct IR_i2c ir, u32 ir_key, u32 *ir_raw)
d5e52653 MCC	118	{
d5e52653 MCC	119	unsigned char buf[2];
b779974b MCC	120	u16 code;
b779974b MCC	121	int size;
d5e52653 MCC	122
d5e52653 MCC	123	/* poll IR chip */
b779974b MCC	124	size = i2c_master_recv(ir->c, buf, sizeof(buf));
	125
	126	if (size != 2)
d5e52653 MCC	127	return -EIO;
	128
	129	/* Does eliminate repeated parity code */
6ea54d93	130	if (buf[1] == 0xff)
d5e52653 MCC	131	return 0;
d5e52653 MCC	132
6ea54d93	133	ir->old = buf[1];
d5e52653	134
b779974b MCC	135	/*
	136	* Rearranges bits to the right order.
	137	* The bit order were determined experimentally by using
	138	* The original Hauppauge Grey IR and another RC5 that uses addr=0x08
	139	* The RC5 code has 14 bits, but we've experimentally determined
	140	* the meaning for only 11 bits.
	141	* So, the code translation is not complete. Yet, it is enough to
	142	* work with the provided RC5 IR.
	143	*/
	144	code =
	145	((buf[0] & 0x01) ? 0x0020 : 0) \| /* 0010 0000 */
	146	((buf[0] & 0x02) ? 0x0010 : 0) \| /* 0001 0000 */
	147	((buf[0] & 0x04) ? 0x0008 : 0) \| /* 0000 1000 */
	148	((buf[0] & 0x08) ? 0x0004 : 0) \| /* 0000 0100 */
	149	((buf[0] & 0x10) ? 0x0002 : 0) \| /* 0000 0010 */
	150	((buf[0] & 0x20) ? 0x0001 : 0) \| /* 0000 0001 */
	151	((buf[1] & 0x08) ? 0x1000 : 0) \| /* 0001 0000 */
	152	((buf[1] & 0x10) ? 0x0800 : 0) \| /* 0000 1000 */
	153	((buf[1] & 0x20) ? 0x0400 : 0) \| /* 0000 0100 */
	154	((buf[1] & 0x40) ? 0x0200 : 0) \| /* 0000 0010 */
	155	((buf[1] & 0x80) ? 0x0100 : 0); /* 0000 0001 */
	156
	157	i2cdprintk("ir hauppauge (em2840): code=0x%02x (rcv=0x%02x%02x)\n",
	158	code, buf[1], buf[0]);
d5e52653 MCC	159
	160	/* return key */
	161	*ir_key = code;
	162	*ir_raw = code;
	163	return 1;
	164	}
	165
c8793b03 MCC	166	int em28xx_get_key_pinnacle_usb_grey(struct IR_i2c ir, u32 ir_key,
c8793b03 MCC	167	u32 *ir_raw)
366cc64b MR	168	{
	169	unsigned char buf[3];
	170
	171	/* poll IR chip */
	172
c668f32d	173	if (3 != i2c_master_recv(ir->c, buf, 3)) {
a924a499	174	i2cdprintk("read error\n");
366cc64b MR	175	return -EIO;
	176	}
	177
a924a499	178	i2cdprintk("key %02x\n", buf[2]&0x3f);
6ea54d93	179	if (buf[0] != 0x00)
366cc64b	180	return 0;
366cc64b MR	181
	182	*ir_key = buf[2]&0x3f;
	183	*ir_raw = buf[2]&0x3f;
	184
	185	return 1;
	186	}
	187
ca39d84d MA	188	int em28xx_get_key_winfast_usbii_deluxe(struct IR_i2c ir, u32 ir_key, u32 *ir_raw)
	189	{
	190	unsigned char subaddr, keydetect, key;
	191
	192	struct i2c_msg msg[] = { { .addr = ir->c->addr, .flags = 0, .buf = &subaddr, .len = 1},
	193
	194	{ .addr = ir->c->addr, .flags = I2C_M_RD, .buf = &keydetect, .len = 1} };
	195
	196	subaddr = 0x10;
	197	if (2 != i2c_transfer(ir->c->adapter, msg, 2)) {
	198	i2cdprintk("read error\n");
	199	return -EIO;
	200	}
	201	if (keydetect == 0x00)
	202	return 0;
	203
	204	subaddr = 0x00;
	205	msg[1].buf = &key;
	206	if (2 != i2c_transfer(ir->c->adapter, msg, 2)) {
	207	i2cdprintk("read error\n");
	208	return -EIO;
	209	}
	210	if (key == 0x00)
	211	return 0;
	212
	213	*ir_key = key;
	214	*ir_raw = key;
	215	return 1;
	216	}
	217
a924a499 MCC	218	/**********************************************************
	219	Poll based get keycode functions
	220	**********************************************************/
	221
4b92253a DH	222	/* This is for the em2860/em2880 */
	223	static int default_polling_getkey(struct em28xx_IR *ir,
	224	struct em28xx_ir_poll_result *poll_result)
a924a499 MCC	225	{
	226	struct em28xx *dev = ir->dev;
	227	int rc;
4b92253a	228	u8 msg[3] = { 0, 0, 0 };
a924a499	229
0a6b8a85 MCC	230	/* Read key toggle, brand, and key code
	231	on registers 0x45, 0x46 and 0x47
	232	*/
a924a499	233	rc = dev->em28xx_read_reg_req_len(dev, 0, EM28XX_R45_IR,
0a6b8a85	234	msg, sizeof(msg));
a924a499 MCC	235	if (rc < 0)
	236	return rc;
	237
4b92253a DH	238	/* Infrared toggle (Reg 0x45[7]) */
	239	poll_result->toggle_bit = (msg[0] >> 7);
	240
	241	/* Infrared read count (Reg 0x45[6:0] */
	242	poll_result->read_count = (msg[0] & 0x7f);
	243
	244	/* Remote Control Address (Reg 0x46) */
	245	poll_result->rc_address = msg[1];
	246
	247	/* Remote Control Data (Reg 0x47) */
	248	poll_result->rc_data[0] = msg[2];
	249
	250	return 0;
	251	}
	252
	253	static int em2874_polling_getkey(struct em28xx_IR *ir,
	254	struct em28xx_ir_poll_result *poll_result)
	255	{
	256	struct em28xx *dev = ir->dev;
	257	int rc;
	258	u8 msg[5] = { 0, 0, 0, 0, 0 };
	259
	260	/* Read key toggle, brand, and key code
	261	on registers 0x51-55
	262	*/
	263	rc = dev->em28xx_read_reg_req_len(dev, 0, EM2874_R51_IR,
	264	msg, sizeof(msg));
	265	if (rc < 0)
	266	return rc;
	267
	268	/* Infrared toggle (Reg 0x51[7]) */
	269	poll_result->toggle_bit = (msg[0] >> 7);
	270
	271	/* Infrared read count (Reg 0x51[6:0] */
	272	poll_result->read_count = (msg[0] & 0x7f);
	273
	274	/* Remote Control Address (Reg 0x52) */
	275	poll_result->rc_address = msg[1];
	276
	277	/* Remote Control Data (Reg 0x53-55) */
	278	poll_result->rc_data[0] = msg[2];
	279	poll_result->rc_data[1] = msg[3];
	280	poll_result->rc_data[2] = msg[4];
	281
	282	return 0;
a924a499 MCC	283	}
	284
	285	/**********************************************************
	286	Polling code for em28xx
	287	**********************************************************/
	288
	289	static void em28xx_ir_handle_key(struct em28xx_IR *ir)
	290	{
4b92253a DH	291	int result;
	292	int do_sendkey = 0;
	293	struct em28xx_ir_poll_result poll_result;
	294
	295	/* read the registers containing the IR status */
	296	result = ir->get_key(ir, &poll_result);
	297	if (result < 0) {
	298	dprintk("ir->get_key() failed %d\n", result);
a924a499	299	return;
4b92253a	300	}
a924a499	301
0278155c	302	dprintk("ir->get_key result tb=%02x rc=%02x lr=%02x data=%02x%02x\n",
4b92253a	303	poll_result.toggle_bit, poll_result.read_count,
0278155c MCC	304	ir->last_readcount, poll_result.rc_address,
0278155c MCC	305	poll_result.rc_data[0]);
4b92253a DH	306
	307	if (ir->dev->chip_id == CHIP_ID_EM2874) {
	308	/* The em2874 clears the readcount field every time the
	309	register is read. The em2860/2880 datasheet says that it
	310	is supposed to clear the readcount, but it doesn't. So with
	311	the em2874, we are looking for a non-zero read count as
	312	opposed to a readcount that is incrementing */
	313	ir->last_readcount = 0;
	314	}
0a6b8a85	315
4b92253a DH	316	if (poll_result.read_count == 0) {
	317	/* The button has not been pressed since the last read */
	318	} else if (ir->last_toggle != poll_result.toggle_bit) {
	319	/* A button has been pressed */
	320	dprintk("button has been pressed\n");
	321	ir->last_toggle = poll_result.toggle_bit;
	322	ir->repeat_interval = 0;
	323	do_sendkey = 1;
	324	} else if (poll_result.toggle_bit == ir->last_toggle &&
	325	poll_result.read_count > 0 &&
	326	poll_result.read_count != ir->last_readcount) {
	327	/* The button is still being held down */
	328	dprintk("button being held down\n");
	329
	330	/* Debouncer for first keypress */
	331	if (ir->repeat_interval++ > 9) {
	332	/* Start repeating after 1 second */
	333	do_sendkey = 1;
0a6b8a85	334	}
4b92253a DH	335	}
	336
	337	if (do_sendkey) {
	338	dprintk("sending keypress\n");
0278155c MCC	339
	340	if (ir->full_code)
	341	ir_input_keydown(ir->input, &ir->ir,
	342	poll_result.rc_address << 8 \|
	343	poll_result.rc_data[0]);
	344	else
	345	ir_input_keydown(ir->input, &ir->ir,
	346	poll_result.rc_data[0]);
	347
a924a499 MCC	348	ir_input_nokey(ir->input, &ir->ir);
a924a499 MCC	349	}
4b92253a DH	350
	351	ir->last_readcount = poll_result.read_count;
	352	return;
a924a499 MCC	353	}
a924a499 MCC	354
a924a499 MCC	355	static void em28xx_ir_work(struct work_struct *work)
a924a499 MCC	356	{
f263bac9	357	struct em28xx_IR *ir = container_of(work, struct em28xx_IR, work.work);
a924a499 MCC	358
a924a499 MCC	359	em28xx_ir_handle_key(ir);
f263bac9	360	schedule_delayed_work(&ir->work, msecs_to_jiffies(ir->polling));
a924a499 MCC	361	}
a924a499 MCC	362
26cdc76b	363	static void em28xx_ir_start(struct em28xx_IR *ir)
a924a499	364	{
f263bac9 JD	365	INIT_DELAYED_WORK(&ir->work, em28xx_ir_work);
f263bac9 JD	366	schedule_delayed_work(&ir->work, 0);
a924a499 MCC	367	}
	368
	369	static void em28xx_ir_stop(struct em28xx_IR *ir)
	370	{
f263bac9	371	cancel_delayed_work_sync(&ir->work);
a924a499 MCC	372	}
a924a499 MCC	373
971e8298	374	int em28xx_ir_change_protocol(void *priv, u64 ir_type)
a924a499	375	{
950b0f5a MCC	376	int rc = 0;
	377	struct em28xx_IR *ir = priv;
	378	struct em28xx *dev = ir->dev;
	379	u8 ir_config = EM2874_IR_RC5;
1bad429e MCC	380
1bad429e MCC	381	/* Adjust xclk based o IR table for RC5/NEC tables */
950b0f5a	382
3f831107	383	dev->board.ir_codes->ir_type = IR_TYPE_OTHER;
950b0f5a	384	if (ir_type == IR_TYPE_RC5) {
1bad429e MCC	385	dev->board.xclk \|= EM28XX_XCLK_IR_RC5_MODE;
1bad429e MCC	386	ir->full_code = 1;
950b0f5a	387	} else if (ir_type == IR_TYPE_NEC) {
1bad429e MCC	388	dev->board.xclk &= ~EM28XX_XCLK_IR_RC5_MODE;
	389	ir_config = EM2874_IR_NEC;
	390	ir->full_code = 1;
950b0f5a MCC	391	} else
	392	rc = -EINVAL;
	393
3f831107 MCC	394	dev->board.ir_codes->ir_type = ir_type;
3f831107 MCC	395
1bad429e MCC	396	em28xx_write_reg_bits(dev, EM28XX_R0F_XCLK, dev->board.xclk,
1bad429e MCC	397	EM28XX_XCLK_IR_RC5_MODE);
a924a499	398
4b92253a DH	399	/* Setup the proper handler based on the chip */
	400	switch (dev->chip_id) {
	401	case CHIP_ID_EM2860:
	402	case CHIP_ID_EM2883:
	403	ir->get_key = default_polling_getkey;
91812fa7	404	break;
4b92253a DH	405	case CHIP_ID_EM2874:
4b92253a DH	406	ir->get_key = em2874_polling_getkey;
4b92253a DH	407	em28xx_write_regs(dev, EM2874_R50_IR_CONFIG, &ir_config, 1);
	408	break;
	409	default:
	410	printk("Unrecognized em28xx chip id: IR not supported\n");
950b0f5a MCC	411	rc = -EINVAL;
	412	}
	413
	414	return rc;
	415	}
	416
	417	int em28xx_ir_init(struct em28xx *dev)
	418	{
	419	struct em28xx_IR *ir;
	420	struct input_dev *input_dev;
	421	int err = -ENOMEM;
	422
	423	if (dev->board.ir_codes == NULL) {
	424	/* No remote control support */
	425	return 0;
a924a499 MCC	426	}
a924a499 MCC	427
950b0f5a MCC	428	ir = kzalloc(sizeof(*ir), GFP_KERNEL);
	429	input_dev = input_allocate_device();
	430	if (!ir \|\| !input_dev)
	431	goto err_out_free;
	432
	433	/* record handles to ourself */
	434	ir->dev = dev;
	435	dev->ir = ir;
	436
	437	ir->input = input_dev;
	438
	439	/*
	440	* em2874 supports more protocols. For now, let's just announce
	441	* the two protocols that were already tested
	442	*/
	443	ir->props.allowed_protos = IR_TYPE_RC5 \| IR_TYPE_NEC;
	444	ir->props.priv = ir;
	445	ir->props.change_protocol = em28xx_ir_change_protocol;
	446
4b92253a DH	447	/* This is how often we ask the chip for IR information */
	448	ir->polling = 100; /* ms */
	449
a924a499 MCC	450	/* init input device */
	451	snprintf(ir->name, sizeof(ir->name), "em28xx IR (%s)",
	452	dev->name);
	453
	454	usb_make_path(dev->udev, ir->phys, sizeof(ir->phys));
	455	strlcat(ir->phys, "/input0", sizeof(ir->phys));
	456
950b0f5a MCC	457	/* Set IR protocol */
950b0f5a MCC	458	em28xx_ir_change_protocol(ir, dev->board.ir_codes->ir_type);
579e7d60	459	err = ir_input_init(input_dev, &ir->ir, IR_TYPE_OTHER);
055cd556 MCC	460	if (err < 0)
	461	goto err_out_free;
	462
a924a499 MCC	463	input_dev->name = ir->name;
	464	input_dev->phys = ir->phys;
	465	input_dev->id.bustype = BUS_USB;
	466	input_dev->id.version = 1;
	467	input_dev->id.vendor = le16_to_cpu(dev->udev->descriptor.idVendor);
	468	input_dev->id.product = le16_to_cpu(dev->udev->descriptor.idProduct);
	469
	470	input_dev->dev.parent = &dev->udev->dev;
950b0f5a	471
a924a499 MCC	472
	473	em28xx_ir_start(ir);
	474
	475	/* all done */
950b0f5a MCC	476	err = ir_input_register(ir->input, dev->board.ir_codes,
950b0f5a MCC	477	&ir->props);
a924a499 MCC	478	if (err)
	479	goto err_out_stop;
	480
	481	return 0;
	482	err_out_stop:
	483	em28xx_ir_stop(ir);
	484	dev->ir = NULL;
	485	err_out_free:
a924a499 MCC	486	kfree(ir);
	487	return err;
	488	}
	489
	490	int em28xx_ir_fini(struct em28xx *dev)
	491	{
	492	struct em28xx_IR *ir = dev->ir;
	493
	494	/* skip detach on non attached boards */
	495	if (!ir)
	496	return 0;
	497
	498	em28xx_ir_stop(ir);
38ef6aa8	499	ir_input_unregister(ir->input);
a924a499 MCC	500	kfree(ir);
	501
	502	/* done */
	503	dev->ir = NULL;
	504	return 0;
	505	}
	506
	507	/**********************************************************
	508	Handle Webcam snapshot button
	509	**********************************************************/
	510
a9fc52bc DH	511	static void em28xx_query_sbutton(struct work_struct *work)
	512	{
	513	/* Poll the register and see if the button is depressed */
	514	struct em28xx *dev =
	515	container_of(work, struct em28xx, sbutton_query_work.work);
	516	int ret;
	517
	518	ret = em28xx_read_reg(dev, EM28XX_R0C_USBSUSP);
	519
	520	if (ret & EM28XX_R0C_USBSUSP_SNAPSHOT) {
	521	u8 cleared;
	522	/* Button is depressed, clear the register */
	523	cleared = ((u8) ret) & ~EM28XX_R0C_USBSUSP_SNAPSHOT;
	524	em28xx_write_regs(dev, EM28XX_R0C_USBSUSP, &cleared, 1);
	525
	526	/* Not emulate the keypress */
	527	input_report_key(dev->sbutton_input_dev, EM28XX_SNAPSHOT_KEY,
	528	1);
	529	/* Now unpress the key */
	530	input_report_key(dev->sbutton_input_dev, EM28XX_SNAPSHOT_KEY,
	531	0);
	532	}
	533
	534	/* Schedule next poll */
	535	schedule_delayed_work(&dev->sbutton_query_work,
	536	msecs_to_jiffies(EM28XX_SBUTTON_QUERY_INTERVAL));
	537	}
	538
	539	void em28xx_register_snapshot_button(struct em28xx *dev)
	540	{
	541	struct input_dev *input_dev;
	542	int err;
	543
	544	em28xx_info("Registering snapshot button...\n");
	545	input_dev = input_allocate_device();
	546	if (!input_dev) {
	547	em28xx_errdev("input_allocate_device failed\n");
	548	return;
	549	}
	550
	551	usb_make_path(dev->udev, dev->snapshot_button_path,
	552	sizeof(dev->snapshot_button_path));
	553	strlcat(dev->snapshot_button_path, "/sbutton",
	554	sizeof(dev->snapshot_button_path));
	555	INIT_DELAYED_WORK(&dev->sbutton_query_work, em28xx_query_sbutton);
	556
	557	input_dev->name = "em28xx snapshot button";
	558	input_dev->phys = dev->snapshot_button_path;
	559	input_dev->evbit[0] = BIT_MASK(EV_KEY) \| BIT_MASK(EV_REP);
	560	set_bit(EM28XX_SNAPSHOT_KEY, input_dev->keybit);
	561	input_dev->keycodesize = 0;
	562	input_dev->keycodemax = 0;
	563	input_dev->id.bustype = BUS_USB;
	564	input_dev->id.vendor = le16_to_cpu(dev->udev->descriptor.idVendor);
	565	input_dev->id.product = le16_to_cpu(dev->udev->descriptor.idProduct);
	566	input_dev->id.version = 1;
	567	input_dev->dev.parent = &dev->udev->dev;
	568
	569	err = input_register_device(input_dev);
	570	if (err) {
	571	em28xx_errdev("input_register_device failed\n");
	572	input_free_device(input_dev);
	573	return;
	574	}
575
576	dev->sbutton_input_dev = input_dev;
577	schedule_delayed_work(&dev->sbutton_query_work,
578	msecs_to_jiffies(EM28XX_SBUTTON_QUERY_INTERVAL));
579	return;
580
581	}
582
583	void em28xx_deregister_snapshot_button(struct em28xx *dev)
584	{
585	if (dev->sbutton_input_dev != NULL) {
586	em28xx_info("Deregistering snapshot button\n");
587	cancel_rearming_delayed_work(&dev->sbutton_query_work);
588	input_unregister_device(dev->sbutton_input_dev);
589	dev->sbutton_input_dev = NULL;
590	}
591	return;
592	}