[linux-2.6-block.git] / drivers / media / pci / cx23885 / cx23885-input.c

/*
 *  Driver for the Conexant CX23885/7/8 PCIe bridge
 *
 *  Infrared remote control input device
 *
 *  Most of this file is
 *
 *  Copyright (C) 2009  Andy Walls <awalls@md.metrocast.net>
 *
 *  However, the cx23885_input_{init,fini} functions contained herein are
 *  derived from Linux kernel files linux/media/video/.../...-input.c marked as:
 *
 *  Copyright (C) 2008 <srinivasa.deevi at conexant dot com>
 *  Copyright (C) 2005 Ludovico Cavedon <cavedon@sssup.it>
 *		       Markus Rechberger <mrechberger@gmail.com>
 *		       Mauro Carvalho Chehab <mchehab@infradead.org>
 *		       Sascha Sommer <saschasommer@freenet.de>
 *  Copyright (C) 2004, 2005 Chris Pascoe
 *  Copyright (C) 2003, 2004 Gerd Knorr
 *  Copyright (C) 2003 Pavel Machek
 *
 *  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.
 */

#include <linux/slab.h>
#include <media/rc-core.h>
#include <media/v4l2-subdev.h>

#include "cx23885.h"
#include "cx23885-input.h"

#define MODULE_NAME "cx23885"

static void cx23885_input_process_measurements(struct cx23885_dev *dev,
					       bool overrun)
{
	struct cx23885_kernel_ir *kernel_ir = dev->kernel_ir;

	ssize_t num;
	int count, i;
	bool handle = false;
	struct ir_raw_event ir_core_event[64];

	do {
		num = 0;
		v4l2_subdev_call(dev->sd_ir, ir, rx_read, (u8 *) ir_core_event,
				 sizeof(ir_core_event), &num);

		count = num / sizeof(struct ir_raw_event);

		for (i = 0; i < count; i++) {
			ir_raw_event_store(kernel_ir->rc,
					   &ir_core_event[i]);
			handle = true;
		}
	} while (num != 0);

	if (overrun)
		ir_raw_event_reset(kernel_ir->rc);
	else if (handle)
		ir_raw_event_handle(kernel_ir->rc);
}

void cx23885_input_rx_work_handler(struct cx23885_dev *dev, u32 events)
{
	struct v4l2_subdev_ir_parameters params;
	int overrun, data_available;

	if (dev->sd_ir == NULL || events == 0)
		return;

	switch (dev->board) {
	case CX23885_BOARD_HAUPPAUGE_HVR1270:
	case CX23885_BOARD_HAUPPAUGE_HVR1850:
	case CX23885_BOARD_HAUPPAUGE_HVR1290:
	case CX23885_BOARD_TERRATEC_CINERGY_T_PCIE_DUAL:
	case CX23885_BOARD_TEVII_S470:
	case CX23885_BOARD_HAUPPAUGE_HVR1250:
	case CX23885_BOARD_MYGICA_X8507:
	case CX23885_BOARD_TBS_6980:
	case CX23885_BOARD_TBS_6981:
	case CX23885_BOARD_DVBSKY_T9580:
	case CX23885_BOARD_DVBSKY_T980C:
	case CX23885_BOARD_DVBSKY_S950C:
	case CX23885_BOARD_TT_CT2_4500_CI:
	case CX23885_BOARD_DVBSKY_S950:
	case CX23885_BOARD_DVBSKY_S952:
		/*
		 * The only boards we handle right now.  However other boards
		 * using the CX2388x integrated IR controller should be similar
		 */
		break;
	default:
		return;
	}

	overrun = events & (V4L2_SUBDEV_IR_RX_SW_FIFO_OVERRUN |
			    V4L2_SUBDEV_IR_RX_HW_FIFO_OVERRUN);

	data_available = events & (V4L2_SUBDEV_IR_RX_END_OF_RX_DETECTED |
				   V4L2_SUBDEV_IR_RX_FIFO_SERVICE_REQ);

	if (overrun) {
		/* If there was a FIFO overrun, stop the device */
		v4l2_subdev_call(dev->sd_ir, ir, rx_g_parameters, &params);
		params.enable = false;
		/* Mitigate race with cx23885_input_ir_stop() */
		params.shutdown = atomic_read(&dev->ir_input_stopping);
		v4l2_subdev_call(dev->sd_ir, ir, rx_s_parameters, &params);
	}

	if (data_available)
		cx23885_input_process_measurements(dev, overrun);

	if (overrun) {
		/* If there was a FIFO overrun, clear & restart the device */
		params.enable = true;
		/* Mitigate race with cx23885_input_ir_stop() */
		params.shutdown = atomic_read(&dev->ir_input_stopping);
		v4l2_subdev_call(dev->sd_ir, ir, rx_s_parameters, &params);
	}
}

static int cx23885_input_ir_start(struct cx23885_dev *dev)
{
	struct v4l2_subdev_ir_parameters params;

	if (dev->sd_ir == NULL)
		return -ENODEV;

	atomic_set(&dev->ir_input_stopping, 0);

	v4l2_subdev_call(dev->sd_ir, ir, rx_g_parameters, &params);
	switch (dev->board) {
	case CX23885_BOARD_HAUPPAUGE_HVR1270:
	case CX23885_BOARD_HAUPPAUGE_HVR1850:
	case CX23885_BOARD_HAUPPAUGE_HVR1290:
	case CX23885_BOARD_HAUPPAUGE_HVR1250:
	case CX23885_BOARD_MYGICA_X8507:
	case CX23885_BOARD_DVBSKY_T9580:
	case CX23885_BOARD_DVBSKY_T980C:
	case CX23885_BOARD_DVBSKY_S950C:
	case CX23885_BOARD_TT_CT2_4500_CI:
	case CX23885_BOARD_DVBSKY_S950:
	case CX23885_BOARD_DVBSKY_S952:
		/*
		 * The IR controller on this board only returns pulse widths.
		 * Any other mode setting will fail to set up the device.
		*/
		params.mode = V4L2_SUBDEV_IR_MODE_PULSE_WIDTH;
		params.enable = true;
		params.interrupt_enable = true;
		params.shutdown = false;

		/* Setup for baseband compatible with both RC-5 and RC-6A */
		params.modulation = false;
		/* RC-5:  2,222,222 ns = 1/36 kHz * 32 cycles * 2 marks * 1.25*/
		/* RC-6A: 3,333,333 ns = 1/36 kHz * 16 cycles * 6 marks * 1.25*/
		params.max_pulse_width = 3333333; /* ns */
		/* RC-5:    666,667 ns = 1/36 kHz * 32 cycles * 1 mark * 0.75 */
		/* RC-6A:   333,333 ns = 1/36 kHz * 16 cycles * 1 mark * 0.75 */
		params.noise_filter_min_width = 333333; /* ns */
		/*
		 * This board has inverted receive sense:
		 * mark is received as low logic level;
		 * falling edges are detected as rising edges; etc.
		 */
		params.invert_level = true;
		break;
	case CX23885_BOARD_TERRATEC_CINERGY_T_PCIE_DUAL:
	case CX23885_BOARD_TEVII_S470:
	case CX23885_BOARD_TBS_6980:
	case CX23885_BOARD_TBS_6981:
		/*
		 * The IR controller on this board only returns pulse widths.
		 * Any other mode setting will fail to set up the device.
		 */
		params.mode = V4L2_SUBDEV_IR_MODE_PULSE_WIDTH;
		params.enable = true;
		params.interrupt_enable = true;
		params.shutdown = false;

		/* Setup for a standard NEC protocol */
		params.carrier_freq = 37917; /* Hz, 455 kHz/12 for NEC */
		params.carrier_range_lower = 33000; /* Hz */
		params.carrier_range_upper = 43000; /* Hz */
		params.duty_cycle = 33; /* percent, 33 percent for NEC */

		/*
		 * NEC max pulse width: (64/3)/(455 kHz/12) * 16 nec_units
		 * (64/3)/(455 kHz/12) * 16 nec_units * 1.375 = 12378022 ns
		 */
		params.max_pulse_width = 12378022; /* ns */

		/*
		 * NEC noise filter min width: (64/3)/(455 kHz/12) * 1 nec_unit
		 * (64/3)/(455 kHz/12) * 1 nec_units * 0.625 = 351648 ns
		 */
		params.noise_filter_min_width = 351648; /* ns */

		params.modulation = false;
		params.invert_level = true;
		break;
	}
	v4l2_subdev_call(dev->sd_ir, ir, rx_s_parameters, &params);
	return 0;
}

static int cx23885_input_ir_open(struct rc_dev *rc)
{
	struct cx23885_kernel_ir *kernel_ir = rc->priv;

	if (kernel_ir->cx == NULL)
		return -ENODEV;

	return cx23885_input_ir_start(kernel_ir->cx);
}

static void cx23885_input_ir_stop(struct cx23885_dev *dev)
{
	struct v4l2_subdev_ir_parameters params;

	if (dev->sd_ir == NULL)
		return;

	/*
	 * Stop the sd_ir subdevice from generating notifications and
	 * scheduling work.
	 * It is shutdown this way in order to mitigate a race with
	 * cx23885_input_rx_work_handler() in the overrun case, which could
	 * re-enable the subdevice.
	 */
	atomic_set(&dev->ir_input_stopping, 1);
	v4l2_subdev_call(dev->sd_ir, ir, rx_g_parameters, &params);
	while (params.shutdown == false) {
		params.enable = false;
		params.interrupt_enable = false;
		params.shutdown = true;
		v4l2_subdev_call(dev->sd_ir, ir, rx_s_parameters, &params);
		v4l2_subdev_call(dev->sd_ir, ir, rx_g_parameters, &params);
	}
	flush_work(&dev->cx25840_work);
	flush_work(&dev->ir_rx_work);
	flush_work(&dev->ir_tx_work);
}

static void cx23885_input_ir_close(struct rc_dev *rc)
{
	struct cx23885_kernel_ir *kernel_ir = rc->priv;

	if (kernel_ir->cx != NULL)
		cx23885_input_ir_stop(kernel_ir->cx);
}

int cx23885_input_init(struct cx23885_dev *dev)
{
	struct cx23885_kernel_ir *kernel_ir;
	struct rc_dev *rc;
	char *rc_map;
	enum rc_driver_type driver_type;
	unsigned long allowed_protos;

	int ret;

	/*
	 * If the IR device (hardware registers, chip, GPIO lines, etc.) isn't
	 * encapsulated in a v4l2_subdev, then I'm not going to deal with it.
	 */
	if (dev->sd_ir == NULL)
		return -ENODEV;

	switch (dev->board) {
	case CX23885_BOARD_HAUPPAUGE_HVR1270:
	case CX23885_BOARD_HAUPPAUGE_HVR1850:
	case CX23885_BOARD_HAUPPAUGE_HVR1290:
	case CX23885_BOARD_HAUPPAUGE_HVR1250:
		/* Integrated CX2388[58] IR controller */
		driver_type = RC_DRIVER_IR_RAW;
		allowed_protos = RC_BIT_ALL;
		/* The grey Hauppauge RC-5 remote */
		rc_map = RC_MAP_HAUPPAUGE;
		break;
	case CX23885_BOARD_TERRATEC_CINERGY_T_PCIE_DUAL:
		/* Integrated CX23885 IR controller */
		driver_type = RC_DRIVER_IR_RAW;
		allowed_protos = RC_BIT_NEC;
		/* The grey Terratec remote with orange buttons */
		rc_map = RC_MAP_NEC_TERRATEC_CINERGY_XS;
		break;
	case CX23885_BOARD_TEVII_S470:
		/* Integrated CX23885 IR controller */
		driver_type = RC_DRIVER_IR_RAW;
		allowed_protos = RC_BIT_ALL;
		/* A guess at the remote */
		rc_map = RC_MAP_TEVII_NEC;
		break;
	case CX23885_BOARD_MYGICA_X8507:
		/* Integrated CX23885 IR controller */
		driver_type = RC_DRIVER_IR_RAW;
		allowed_protos = RC_BIT_ALL;
		/* A guess at the remote */
		rc_map = RC_MAP_TOTAL_MEDIA_IN_HAND_02;
		break;
	case CX23885_BOARD_TBS_6980:
	case CX23885_BOARD_TBS_6981:
		/* Integrated CX23885 IR controller */
		driver_type = RC_DRIVER_IR_RAW;
		allowed_protos = RC_BIT_ALL;
		/* A guess at the remote */
		rc_map = RC_MAP_TBS_NEC;
		break;
	case CX23885_BOARD_DVBSKY_T9580:
	case CX23885_BOARD_DVBSKY_T980C:
	case CX23885_BOARD_DVBSKY_S950C:
	case CX23885_BOARD_DVBSKY_S950:
	case CX23885_BOARD_DVBSKY_S952:
		/* Integrated CX23885 IR controller */
		driver_type = RC_DRIVER_IR_RAW;
		allowed_protos = RC_BIT_ALL;
		rc_map = RC_MAP_DVBSKY;
		break;
	case CX23885_BOARD_TT_CT2_4500_CI:
		/* Integrated CX23885 IR controller */
		driver_type = RC_DRIVER_IR_RAW;
		allowed_protos = RC_BIT_ALL;
		rc_map = RC_MAP_TT_1500;
		break;
	default:
		return -ENODEV;
	}

	/* cx23885 board instance kernel IR state */
	kernel_ir = kzalloc(sizeof(struct cx23885_kernel_ir), GFP_KERNEL);
	if (kernel_ir == NULL)
		return -ENOMEM;

	kernel_ir->cx = dev;
	kernel_ir->name = kasprintf(GFP_KERNEL, "cx23885 IR (%s)",
				    cx23885_boards[dev->board].name);
	kernel_ir->phys = kasprintf(GFP_KERNEL, "pci-%s/ir0",
				    pci_name(dev->pci));

	/* input device */
	rc = rc_allocate_device();
	if (!rc) {
		ret = -ENOMEM;
		goto err_out_free;
	}

	kernel_ir->rc = rc;
	rc->input_name = kernel_ir->name;
	rc->input_phys = kernel_ir->phys;
	rc->input_id.bustype = BUS_PCI;
	rc->input_id.version = 1;
	if (dev->pci->subsystem_vendor) {
		rc->input_id.vendor  = dev->pci->subsystem_vendor;
		rc->input_id.product = dev->pci->subsystem_device;
	} else {
		rc->input_id.vendor  = dev->pci->vendor;
		rc->input_id.product = dev->pci->device;
	}
	rc->dev.parent = &dev->pci->dev;
	rc->driver_type = driver_type;
	rc->allowed_protocols = allowed_protos;
	rc->priv = kernel_ir;
	rc->open = cx23885_input_ir_open;
	rc->close = cx23885_input_ir_close;
	rc->map_name = rc_map;
	rc->driver_name = MODULE_NAME;

	/* Go */
	dev->kernel_ir = kernel_ir;
	ret = rc_register_device(rc);
	if (ret)
		goto err_out_stop;

	return 0;

err_out_stop:
	cx23885_input_ir_stop(dev);
	dev->kernel_ir = NULL;
	rc_free_device(rc);
err_out_free:
	kfree(kernel_ir->phys);
	kfree(kernel_ir->name);
	kfree(kernel_ir);
	return ret;
}

void cx23885_input_fini(struct cx23885_dev *dev)
{
	/* Always stop the IR hardware from generating interrupts */
	cx23885_input_ir_stop(dev);

	if (dev->kernel_ir == NULL)
		return;
	rc_unregister_device(dev->kernel_ir->rc);
	kfree(dev->kernel_ir->phys);
	kfree(dev->kernel_ir->name);
	kfree(dev->kernel_ir);
	dev->kernel_ir = NULL;
}
Commit	Line	Data
dbda8f70 AW	1	/*
	2	* Driver for the Conexant CX23885/7/8 PCIe bridge
	3	*
	4	* Infrared remote control input device
	5	*
	6	* Most of this file is
	7	*
6afdeaf8	8	* Copyright (C) 2009 Andy Walls <awalls@md.metrocast.net>
dbda8f70 AW	9	*
	10	* However, the cx23885_input_{init,fini} functions contained herein are
	11	* derived from Linux kernel files linux/media/video/.../...-input.c marked as:
	12	*
	13	* Copyright (C) 2008 <srinivasa.deevi at conexant dot com>
	14	* Copyright (C) 2005 Ludovico Cavedon <cavedon@sssup.it>
	15	* Markus Rechberger <mrechberger@gmail.com>
	16	* Mauro Carvalho Chehab <mchehab@infradead.org>
	17	* Sascha Sommer <saschasommer@freenet.de>
	18	* Copyright (C) 2004, 2005 Chris Pascoe
	19	* Copyright (C) 2003, 2004 Gerd Knorr
	20	* Copyright (C) 2003 Pavel Machek
	21	*
	22	* This program is free software; you can redistribute it and/or
	23	* modify it under the terms of the GNU General Public License
	24	* as published by the Free Software Foundation; either version 2
	25	* of the License, or (at your option) any later version.
	26	*
	27	* This program is distributed in the hope that it will be useful,
	28	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	29	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	30	* GNU General Public License for more details.
dbda8f70 AW	31	*/
dbda8f70 AW	32
5a0e3ad6	33	#include <linux/slab.h>
6bda9644	34	#include <media/rc-core.h>
dbda8f70 AW	35	#include <media/v4l2-subdev.h>
	36
	37	#include "cx23885.h"
ada73eee	38	#include "cx23885-input.h"
dbda8f70	39
727e625c MCC	40	#define MODULE_NAME "cx23885"
727e625c MCC	41
43c24078 AW	42	static void cx23885_input_process_measurements(struct cx23885_dev *dev,
43c24078 AW	43	bool overrun)
dbda8f70	44	{
43c24078	45	struct cx23885_kernel_ir *kernel_ir = dev->kernel_ir;
dbda8f70	46
43c24078	47	ssize_t num;
dbda8f70	48	int count, i;
43c24078	49	bool handle = false;
c02e0d12	50	struct ir_raw_event ir_core_event[64];
dbda8f70 AW	51
dbda8f70 AW	52	do {
43c24078	53	num = 0;
c02e0d12 AW	54	v4l2_subdev_call(dev->sd_ir, ir, rx_read, (u8 *) ir_core_event,
c02e0d12 AW	55	sizeof(ir_core_event), &num);
dbda8f70	56
c02e0d12	57	count = num / sizeof(struct ir_raw_event);
dbda8f70	58
43c24078	59	for (i = 0; i < count; i++) {
d8b4b582	60	ir_raw_event_store(kernel_ir->rc,
c02e0d12	61	&ir_core_event[i]);
43c24078	62	handle = true;
dbda8f70	63	}
dbda8f70	64	} while (num != 0);
43c24078 AW	65
43c24078 AW	66	if (overrun)
d8b4b582	67	ir_raw_event_reset(kernel_ir->rc);
43c24078	68	else if (handle)
d8b4b582	69	ir_raw_event_handle(kernel_ir->rc);
dbda8f70 AW	70	}
	71
	72	void cx23885_input_rx_work_handler(struct cx23885_dev *dev, u32 events)
	73	{
	74	struct v4l2_subdev_ir_parameters params;
	75	int overrun, data_available;
	76
	77	if (dev->sd_ir == NULL \|\| events == 0)
	78	return;
	79
	80	switch (dev->board) {
9b3d8ecc	81	case CX23885_BOARD_HAUPPAUGE_HVR1270:
dbda8f70	82	case CX23885_BOARD_HAUPPAUGE_HVR1850:
7fec6fee	83	case CX23885_BOARD_HAUPPAUGE_HVR1290:
076f0e35	84	case CX23885_BOARD_TERRATEC_CINERGY_T_PCIE_DUAL:
98d109f9 AW	85	case CX23885_BOARD_TEVII_S470:
98d109f9 AW	86	case CX23885_BOARD_HAUPPAUGE_HVR1250:
e5f670b7	87	case CX23885_BOARD_MYGICA_X8507:
e6001482 LA	88	case CX23885_BOARD_TBS_6980:
e6001482 LA	89	case CX23885_BOARD_TBS_6981:
d11a3835	90	case CX23885_BOARD_DVBSKY_T9580:
070e6661	91	case CX23885_BOARD_DVBSKY_T980C:
070e6661	92	case CX23885_BOARD_DVBSKY_S950C:
61b103e8	93	case CX23885_BOARD_TT_CT2_4500_CI:
cba5480c	94	case CX23885_BOARD_DVBSKY_S950:
c29d6a83	95	case CX23885_BOARD_DVBSKY_S952:
dbda8f70	96	/*
98d109f9	97	* The only boards we handle right now. However other boards
dbda8f70 AW	98	* using the CX2388x integrated IR controller should be similar
	99	*/
	100	break;
	101	default:
	102	return;
	103	}
	104
	105	overrun = events & (V4L2_SUBDEV_IR_RX_SW_FIFO_OVERRUN \|
	106	V4L2_SUBDEV_IR_RX_HW_FIFO_OVERRUN);
	107
	108	data_available = events & (V4L2_SUBDEV_IR_RX_END_OF_RX_DETECTED \|
	109	V4L2_SUBDEV_IR_RX_FIFO_SERVICE_REQ);
	110
	111	if (overrun) {
	112	/* If there was a FIFO overrun, stop the device */
	113	v4l2_subdev_call(dev->sd_ir, ir, rx_g_parameters, &params);
	114	params.enable = false;
	115	/* Mitigate race with cx23885_input_ir_stop() */
	116	params.shutdown = atomic_read(&dev->ir_input_stopping);
	117	v4l2_subdev_call(dev->sd_ir, ir, rx_s_parameters, &params);
	118	}
	119
	120	if (data_available)
43c24078	121	cx23885_input_process_measurements(dev, overrun);
dbda8f70 AW	122
	123	if (overrun) {
	124	/* If there was a FIFO overrun, clear & restart the device */
	125	params.enable = true;
	126	/* Mitigate race with cx23885_input_ir_stop() */
	127	params.shutdown = atomic_read(&dev->ir_input_stopping);
	128	v4l2_subdev_call(dev->sd_ir, ir, rx_s_parameters, &params);
	129	}
	130	}
	131
43c24078	132	static int cx23885_input_ir_start(struct cx23885_dev *dev)
dbda8f70	133	{
dbda8f70 AW	134	struct v4l2_subdev_ir_parameters params;
	135
	136	if (dev->sd_ir == NULL)
43c24078	137	return -ENODEV;
dbda8f70 AW	138
	139	atomic_set(&dev->ir_input_stopping, 0);
	140
dbda8f70 AW	141	v4l2_subdev_call(dev->sd_ir, ir, rx_g_parameters, &params);
dbda8f70 AW	142	switch (dev->board) {
9b3d8ecc	143	case CX23885_BOARD_HAUPPAUGE_HVR1270:
dbda8f70	144	case CX23885_BOARD_HAUPPAUGE_HVR1850:
7fec6fee	145	case CX23885_BOARD_HAUPPAUGE_HVR1290:
98d109f9	146	case CX23885_BOARD_HAUPPAUGE_HVR1250:
e5f670b7	147	case CX23885_BOARD_MYGICA_X8507:
d11a3835	148	case CX23885_BOARD_DVBSKY_T9580:
070e6661	149	case CX23885_BOARD_DVBSKY_T980C:
070e6661	150	case CX23885_BOARD_DVBSKY_S950C:
61b103e8	151	case CX23885_BOARD_TT_CT2_4500_CI:
cba5480c	152	case CX23885_BOARD_DVBSKY_S950:
c29d6a83	153	case CX23885_BOARD_DVBSKY_S952:
dbda8f70 AW	154	/*
	155	* The IR controller on this board only returns pulse widths.
	156	* Any other mode setting will fail to set up the device.
	157	*/
	158	params.mode = V4L2_SUBDEV_IR_MODE_PULSE_WIDTH;
	159	params.enable = true;
	160	params.interrupt_enable = true;
	161	params.shutdown = false;
	162
	163	/* Setup for baseband compatible with both RC-5 and RC-6A */
	164	params.modulation = false;
	165	/* RC-5: 2,222,222 ns = 1/36 kHz * 32 cycles * 2 marks * 1.25*/
	166	/* RC-6A: 3,333,333 ns = 1/36 kHz * 16 cycles * 6 marks * 1.25*/
	167	params.max_pulse_width = 3333333; /* ns */
	168	/* RC-5: 666,667 ns = 1/36 kHz * 32 cycles * 1 mark * 0.75 */
	169	/* RC-6A: 333,333 ns = 1/36 kHz * 16 cycles * 1 mark * 0.75 */
	170	params.noise_filter_min_width = 333333; /* ns */
	171	/*
	172	* This board has inverted receive sense:
	173	* mark is received as low logic level;
	174	* falling edges are detected as rising edges; etc.
	175	*/
5a28d9a3	176	params.invert_level = true;
dbda8f70	177	break;
076f0e35	178	case CX23885_BOARD_TERRATEC_CINERGY_T_PCIE_DUAL:
98d109f9	179	case CX23885_BOARD_TEVII_S470:
e6001482 LA	180	case CX23885_BOARD_TBS_6980:
e6001482 LA	181	case CX23885_BOARD_TBS_6981:
98d109f9 AW	182	/*
	183	* The IR controller on this board only returns pulse widths.
	184	* Any other mode setting will fail to set up the device.
	185	*/
	186	params.mode = V4L2_SUBDEV_IR_MODE_PULSE_WIDTH;
	187	params.enable = true;
	188	params.interrupt_enable = true;
	189	params.shutdown = false;
	190
	191	/* Setup for a standard NEC protocol */
	192	params.carrier_freq = 37917; /* Hz, 455 kHz/12 for NEC */
	193	params.carrier_range_lower = 33000; /* Hz */
	194	params.carrier_range_upper = 43000; /* Hz */
	195	params.duty_cycle = 33; /* percent, 33 percent for NEC */
	196
	197	/*
	198	* NEC max pulse width: (64/3)/(455 kHz/12) * 16 nec_units
	199	* (64/3)/(455 kHz/12) * 16 nec_units * 1.375 = 12378022 ns
	200	*/
	201	params.max_pulse_width = 12378022; /* ns */
	202
	203	/*
	204	* NEC noise filter min width: (64/3)/(455 kHz/12) * 1 nec_unit
	205	* (64/3)/(455 kHz/12) * 1 nec_units * 0.625 = 351648 ns
	206	*/
	207	params.noise_filter_min_width = 351648; /* ns */
	208
	209	params.modulation = false;
	210	params.invert_level = true;
	211	break;
dbda8f70 AW	212	}
dbda8f70 AW	213	v4l2_subdev_call(dev->sd_ir, ir, rx_s_parameters, &params);
43c24078 AW	214	return 0;
	215	}
	216
d8b4b582	217	static int cx23885_input_ir_open(struct rc_dev *rc)
43c24078	218	{
d8b4b582	219	struct cx23885_kernel_ir *kernel_ir = rc->priv;
43c24078 AW	220
	221	if (kernel_ir->cx == NULL)
	222	return -ENODEV;
	223
	224	return cx23885_input_ir_start(kernel_ir->cx);
dbda8f70 AW	225	}
	226
	227	static void cx23885_input_ir_stop(struct cx23885_dev *dev)
	228	{
dbda8f70 AW	229	struct v4l2_subdev_ir_parameters params;
	230
	231	if (dev->sd_ir == NULL)
	232	return;
	233
	234	/*
	235	* Stop the sd_ir subdevice from generating notifications and
	236	* scheduling work.
	237	* It is shutdown this way in order to mitigate a race with
	238	* cx23885_input_rx_work_handler() in the overrun case, which could
	239	* re-enable the subdevice.
	240	*/
	241	atomic_set(&dev->ir_input_stopping, 1);
	242	v4l2_subdev_call(dev->sd_ir, ir, rx_g_parameters, &params);
	243	while (params.shutdown == false) {
	244	params.enable = false;
	245	params.interrupt_enable = false;
	246	params.shutdown = true;
	247	v4l2_subdev_call(dev->sd_ir, ir, rx_s_parameters, &params);
	248	v4l2_subdev_call(dev->sd_ir, ir, rx_g_parameters, &params);
	249	}
43829731 TH	250	flush_work(&dev->cx25840_work);
	251	flush_work(&dev->ir_rx_work);
	252	flush_work(&dev->ir_tx_work);
43c24078	253	}
dbda8f70	254
d8b4b582	255	static void cx23885_input_ir_close(struct rc_dev *rc)
43c24078	256	{
d8b4b582	257	struct cx23885_kernel_ir *kernel_ir = rc->priv;
43c24078 AW	258
	259	if (kernel_ir->cx != NULL)
	260	cx23885_input_ir_stop(kernel_ir->cx);
dbda8f70 AW	261	}
	262
	263	int cx23885_input_init(struct cx23885_dev *dev)
	264	{
43c24078	265	struct cx23885_kernel_ir *kernel_ir;
d8b4b582	266	struct rc_dev *rc;
43c24078 AW	267	char *rc_map;
	268	enum rc_driver_type driver_type;
	269	unsigned long allowed_protos;
	270
dbda8f70 AW	271	int ret;
	272
	273	/*
	274	* If the IR device (hardware registers, chip, GPIO lines, etc.) isn't
	275	* encapsulated in a v4l2_subdev, then I'm not going to deal with it.
	276	*/
	277	if (dev->sd_ir == NULL)
	278	return -ENODEV;
	279
	280	switch (dev->board) {
9b3d8ecc	281	case CX23885_BOARD_HAUPPAUGE_HVR1270:
dbda8f70	282	case CX23885_BOARD_HAUPPAUGE_HVR1850:
7fec6fee	283	case CX23885_BOARD_HAUPPAUGE_HVR1290:
98d109f9 AW	284	case CX23885_BOARD_HAUPPAUGE_HVR1250:
98d109f9 AW	285	/* Integrated CX2388[58] IR controller */
43c24078	286	driver_type = RC_DRIVER_IR_RAW;
c003ab1b	287	allowed_protos = RC_BIT_ALL;
43c24078	288	/* The grey Hauppauge RC-5 remote */
15195d3a	289	rc_map = RC_MAP_HAUPPAUGE;
dbda8f70	290	break;
076f0e35 DB	291	case CX23885_BOARD_TERRATEC_CINERGY_T_PCIE_DUAL:
	292	/* Integrated CX23885 IR controller */
	293	driver_type = RC_DRIVER_IR_RAW;
c003ab1b	294	allowed_protos = RC_BIT_NEC;
076f0e35 DB	295	/* The grey Terratec remote with orange buttons */
	296	rc_map = RC_MAP_NEC_TERRATEC_CINERGY_XS;
	297	break;
98d109f9 AW	298	case CX23885_BOARD_TEVII_S470:
	299	/* Integrated CX23885 IR controller */
	300	driver_type = RC_DRIVER_IR_RAW;
c003ab1b	301	allowed_protos = RC_BIT_ALL;
98d109f9 AW	302	/* A guess at the remote */
	303	rc_map = RC_MAP_TEVII_NEC;
	304	break;
e5f670b7 AJD	305	case CX23885_BOARD_MYGICA_X8507:
	306	/* Integrated CX23885 IR controller */
	307	driver_type = RC_DRIVER_IR_RAW;
	308	allowed_protos = RC_BIT_ALL;
	309	/* A guess at the remote */
	310	rc_map = RC_MAP_TOTAL_MEDIA_IN_HAND_02;
	311	break;
e6001482 LA	312	case CX23885_BOARD_TBS_6980:
	313	case CX23885_BOARD_TBS_6981:
	314	/* Integrated CX23885 IR controller */
	315	driver_type = RC_DRIVER_IR_RAW;
	316	allowed_protos = RC_BIT_ALL;
	317	/* A guess at the remote */
	318	rc_map = RC_MAP_TBS_NEC;
	319	break;
d11a3835	320	case CX23885_BOARD_DVBSKY_T9580:
070e6661	321	case CX23885_BOARD_DVBSKY_T980C:
070e6661	322	case CX23885_BOARD_DVBSKY_S950C:
cba5480c	323	case CX23885_BOARD_DVBSKY_S950:
c29d6a83	324	case CX23885_BOARD_DVBSKY_S952:
d11a3835	325	/* Integrated CX23885 IR controller */
	326	driver_type = RC_DRIVER_IR_RAW;
	327	allowed_protos = RC_BIT_ALL;
	328	rc_map = RC_MAP_DVBSKY;
	329	break;
61b103e8 OS	330	case CX23885_BOARD_TT_CT2_4500_CI:
	331	/* Integrated CX23885 IR controller */
	332	driver_type = RC_DRIVER_IR_RAW;
	333	allowed_protos = RC_BIT_ALL;
	334	rc_map = RC_MAP_TT_1500;
	335	break;
43c24078	336	default:
dbda8f70	337	return -ENODEV;
dbda8f70 AW	338	}
dbda8f70 AW	339
43c24078 AW	340	/* cx23885 board instance kernel IR state */
	341	kernel_ir = kzalloc(sizeof(struct cx23885_kernel_ir), GFP_KERNEL);
	342	if (kernel_ir == NULL)
	343	return -ENOMEM;
dbda8f70	344
43c24078 AW	345	kernel_ir->cx = dev;
	346	kernel_ir->name = kasprintf(GFP_KERNEL, "cx23885 IR (%s)",
	347	cx23885_boards[dev->board].name);
	348	kernel_ir->phys = kasprintf(GFP_KERNEL, "pci-%s/ir0",
	349	pci_name(dev->pci));
dbda8f70	350
43c24078	351	/* input device */
d8b4b582 DH	352	rc = rc_allocate_device();
d8b4b582 DH	353	if (!rc) {
43c24078	354	ret = -ENOMEM;
055cd556	355	goto err_out_free;
43c24078	356	}
055cd556	357
d8b4b582 DH	358	kernel_ir->rc = rc;
	359	rc->input_name = kernel_ir->name;
	360	rc->input_phys = kernel_ir->phys;
	361	rc->input_id.bustype = BUS_PCI;
	362	rc->input_id.version = 1;
dbda8f70	363	if (dev->pci->subsystem_vendor) {
d8b4b582 DH	364	rc->input_id.vendor = dev->pci->subsystem_vendor;
d8b4b582 DH	365	rc->input_id.product = dev->pci->subsystem_device;
dbda8f70	366	} else {
d8b4b582 DH	367	rc->input_id.vendor = dev->pci->vendor;
d8b4b582 DH	368	rc->input_id.product = dev->pci->device;
dbda8f70	369	}
d8b4b582 DH	370	rc->dev.parent = &dev->pci->dev;
d8b4b582 DH	371	rc->driver_type = driver_type;
c5540fbb	372	rc->allowed_protocols = allowed_protos;
d8b4b582 DH	373	rc->priv = kernel_ir;
	374	rc->open = cx23885_input_ir_open;
	375	rc->close = cx23885_input_ir_close;
	376	rc->map_name = rc_map;
	377	rc->driver_name = MODULE_NAME;
43c24078 AW	378
	379	/* Go */
	380	dev->kernel_ir = kernel_ir;
d8b4b582	381	ret = rc_register_device(rc);
dbda8f70 AW	382	if (ret)
	383	goto err_out_stop;
	384
	385	return 0;
	386
	387	err_out_stop:
	388	cx23885_input_ir_stop(dev);
43c24078	389	dev->kernel_ir = NULL;
d8b4b582	390	rc_free_device(rc);
dbda8f70	391	err_out_free:
43c24078 AW	392	kfree(kernel_ir->phys);
	393	kfree(kernel_ir->name);
	394	kfree(kernel_ir);
dbda8f70 AW	395	return ret;
	396	}
	397
	398	void cx23885_input_fini(struct cx23885_dev *dev)
	399	{
	400	/* Always stop the IR hardware from generating interrupts */
	401	cx23885_input_ir_stop(dev);
	402
43c24078	403	if (dev->kernel_ir == NULL)
dbda8f70	404	return;
d8b4b582	405	rc_unregister_device(dev->kernel_ir->rc);
43c24078 AW	406	kfree(dev->kernel_ir->phys);
	407	kfree(dev->kernel_ir->name);
	408	kfree(dev->kernel_ir);
	409	dev->kernel_ir = NULL;
dbda8f70	410	}