[mirror_ubuntu-artful-kernel.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 "cx23885.h"
#include "cx23885-input.h"

#include <linux/slab.h>
#include <media/rc-core.h>
#include <media/v4l2-subdev.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:
	case CX23885_BOARD_DVBSKY_T982:
		/*
		 * 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:
	case CX23885_BOARD_DVBSKY_T982:
		/*
		 * 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;
	u64 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 */
		allowed_protos = RC_BIT_ALL_IR_DECODER;
		/* The grey Hauppauge RC-5 remote */
		rc_map = RC_MAP_HAUPPAUGE;
		break;
	case CX23885_BOARD_TERRATEC_CINERGY_T_PCIE_DUAL:
		/* Integrated CX23885 IR controller */
		allowed_protos = RC_BIT_ALL_IR_DECODER;
		/* 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 */
		allowed_protos = RC_BIT_ALL_IR_DECODER;
		/* A guess at the remote */
		rc_map = RC_MAP_TEVII_NEC;
		break;
	case CX23885_BOARD_MYGICA_X8507:
		/* Integrated CX23885 IR controller */
		allowed_protos = RC_BIT_ALL_IR_DECODER;
		/* 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 */
		allowed_protos = RC_BIT_ALL_IR_DECODER;
		/* 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:
	case CX23885_BOARD_DVBSKY_T982:
		/* Integrated CX23885 IR controller */
		allowed_protos = RC_BIT_ALL_IR_DECODER;
		rc_map = RC_MAP_DVBSKY;
		break;
	case CX23885_BOARD_TT_CT2_4500_CI:
		/* Integrated CX23885 IR controller */
		allowed_protos = RC_BIT_ALL_IR_DECODER;
		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(RC_DRIVER_IR_RAW);
	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->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
e39682b5 MCC	33	#include "cx23885.h"
	34	#include "cx23885-input.h"
	35
5a0e3ad6	36	#include <linux/slab.h>
6bda9644	37	#include <media/rc-core.h>
dbda8f70 AW	38	#include <media/v4l2-subdev.h>
dbda8f70 AW	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:
c02ef64a	96	case CX23885_BOARD_DVBSKY_T982:
dbda8f70	97	/*
98d109f9	98	* The only boards we handle right now. However other boards
dbda8f70 AW	99	* using the CX2388x integrated IR controller should be similar
	100	*/
	101	break;
	102	default:
	103	return;
	104	}
	105
	106	overrun = events & (V4L2_SUBDEV_IR_RX_SW_FIFO_OVERRUN \|
	107	V4L2_SUBDEV_IR_RX_HW_FIFO_OVERRUN);
	108
	109	data_available = events & (V4L2_SUBDEV_IR_RX_END_OF_RX_DETECTED \|
	110	V4L2_SUBDEV_IR_RX_FIFO_SERVICE_REQ);
	111
	112	if (overrun) {
	113	/* If there was a FIFO overrun, stop the device */
	114	v4l2_subdev_call(dev->sd_ir, ir, rx_g_parameters, &params);
	115	params.enable = false;
	116	/* Mitigate race with cx23885_input_ir_stop() */
	117	params.shutdown = atomic_read(&dev->ir_input_stopping);
	118	v4l2_subdev_call(dev->sd_ir, ir, rx_s_parameters, &params);
	119	}
	120
	121	if (data_available)
43c24078	122	cx23885_input_process_measurements(dev, overrun);
dbda8f70 AW	123
	124	if (overrun) {
	125	/* If there was a FIFO overrun, clear & restart the device */
	126	params.enable = true;
	127	/* Mitigate race with cx23885_input_ir_stop() */
	128	params.shutdown = atomic_read(&dev->ir_input_stopping);
	129	v4l2_subdev_call(dev->sd_ir, ir, rx_s_parameters, &params);
	130	}
	131	}
	132
43c24078	133	static int cx23885_input_ir_start(struct cx23885_dev *dev)
dbda8f70	134	{
dbda8f70 AW	135	struct v4l2_subdev_ir_parameters params;
	136
	137	if (dev->sd_ir == NULL)
43c24078	138	return -ENODEV;
dbda8f70 AW	139
	140	atomic_set(&dev->ir_input_stopping, 0);
	141
dbda8f70 AW	142	v4l2_subdev_call(dev->sd_ir, ir, rx_g_parameters, &params);
dbda8f70 AW	143	switch (dev->board) {
9b3d8ecc	144	case CX23885_BOARD_HAUPPAUGE_HVR1270:
dbda8f70	145	case CX23885_BOARD_HAUPPAUGE_HVR1850:
7fec6fee	146	case CX23885_BOARD_HAUPPAUGE_HVR1290:
98d109f9	147	case CX23885_BOARD_HAUPPAUGE_HVR1250:
e5f670b7	148	case CX23885_BOARD_MYGICA_X8507:
d11a3835	149	case CX23885_BOARD_DVBSKY_T9580:
070e6661	150	case CX23885_BOARD_DVBSKY_T980C:
070e6661	151	case CX23885_BOARD_DVBSKY_S950C:
61b103e8	152	case CX23885_BOARD_TT_CT2_4500_CI:
cba5480c	153	case CX23885_BOARD_DVBSKY_S950:
c29d6a83	154	case CX23885_BOARD_DVBSKY_S952:
c02ef64a	155	case CX23885_BOARD_DVBSKY_T982:
dbda8f70 AW	156	/*
	157	* The IR controller on this board only returns pulse widths.
	158	* Any other mode setting will fail to set up the device.
	159	*/
	160	params.mode = V4L2_SUBDEV_IR_MODE_PULSE_WIDTH;
	161	params.enable = true;
	162	params.interrupt_enable = true;
	163	params.shutdown = false;
	164
	165	/* Setup for baseband compatible with both RC-5 and RC-6A */
	166	params.modulation = false;
	167	/* RC-5: 2,222,222 ns = 1/36 kHz * 32 cycles * 2 marks * 1.25*/
	168	/* RC-6A: 3,333,333 ns = 1/36 kHz * 16 cycles * 6 marks * 1.25*/
	169	params.max_pulse_width = 3333333; /* ns */
	170	/* RC-5: 666,667 ns = 1/36 kHz * 32 cycles * 1 mark * 0.75 */
	171	/* RC-6A: 333,333 ns = 1/36 kHz * 16 cycles * 1 mark * 0.75 */
	172	params.noise_filter_min_width = 333333; /* ns */
	173	/*
	174	* This board has inverted receive sense:
	175	* mark is received as low logic level;
	176	* falling edges are detected as rising edges; etc.
	177	*/
5a28d9a3	178	params.invert_level = true;
dbda8f70	179	break;
076f0e35	180	case CX23885_BOARD_TERRATEC_CINERGY_T_PCIE_DUAL:
98d109f9	181	case CX23885_BOARD_TEVII_S470:
e6001482 LA	182	case CX23885_BOARD_TBS_6980:
e6001482 LA	183	case CX23885_BOARD_TBS_6981:
98d109f9 AW	184	/*
	185	* The IR controller on this board only returns pulse widths.
	186	* Any other mode setting will fail to set up the device.
	187	*/
	188	params.mode = V4L2_SUBDEV_IR_MODE_PULSE_WIDTH;
	189	params.enable = true;
	190	params.interrupt_enable = true;
	191	params.shutdown = false;
	192
	193	/* Setup for a standard NEC protocol */
	194	params.carrier_freq = 37917; /* Hz, 455 kHz/12 for NEC */
	195	params.carrier_range_lower = 33000; /* Hz */
	196	params.carrier_range_upper = 43000; /* Hz */
	197	params.duty_cycle = 33; /* percent, 33 percent for NEC */
	198
	199	/*
	200	* NEC max pulse width: (64/3)/(455 kHz/12) * 16 nec_units
	201	* (64/3)/(455 kHz/12) * 16 nec_units * 1.375 = 12378022 ns
	202	*/
	203	params.max_pulse_width = 12378022; /* ns */
	204
	205	/*
	206	* NEC noise filter min width: (64/3)/(455 kHz/12) * 1 nec_unit
	207	* (64/3)/(455 kHz/12) * 1 nec_units * 0.625 = 351648 ns
	208	*/
	209	params.noise_filter_min_width = 351648; /* ns */
	210
	211	params.modulation = false;
	212	params.invert_level = true;
	213	break;
dbda8f70 AW	214	}
dbda8f70 AW	215	v4l2_subdev_call(dev->sd_ir, ir, rx_s_parameters, &params);
43c24078 AW	216	return 0;
	217	}
	218
d8b4b582	219	static int cx23885_input_ir_open(struct rc_dev *rc)
43c24078	220	{
d8b4b582	221	struct cx23885_kernel_ir *kernel_ir = rc->priv;
43c24078 AW	222
	223	if (kernel_ir->cx == NULL)
	224	return -ENODEV;
	225
	226	return cx23885_input_ir_start(kernel_ir->cx);
dbda8f70 AW	227	}
	228
	229	static void cx23885_input_ir_stop(struct cx23885_dev *dev)
	230	{
dbda8f70 AW	231	struct v4l2_subdev_ir_parameters params;
	232
	233	if (dev->sd_ir == NULL)
	234	return;
	235
	236	/*
	237	* Stop the sd_ir subdevice from generating notifications and
	238	* scheduling work.
	239	* It is shutdown this way in order to mitigate a race with
	240	* cx23885_input_rx_work_handler() in the overrun case, which could
	241	* re-enable the subdevice.
	242	*/
	243	atomic_set(&dev->ir_input_stopping, 1);
	244	v4l2_subdev_call(dev->sd_ir, ir, rx_g_parameters, &params);
	245	while (params.shutdown == false) {
	246	params.enable = false;
	247	params.interrupt_enable = false;
	248	params.shutdown = true;
	249	v4l2_subdev_call(dev->sd_ir, ir, rx_s_parameters, &params);
	250	v4l2_subdev_call(dev->sd_ir, ir, rx_g_parameters, &params);
	251	}
43829731 TH	252	flush_work(&dev->cx25840_work);
	253	flush_work(&dev->ir_rx_work);
	254	flush_work(&dev->ir_tx_work);
43c24078	255	}
dbda8f70	256
d8b4b582	257	static void cx23885_input_ir_close(struct rc_dev *rc)
43c24078	258	{
d8b4b582	259	struct cx23885_kernel_ir *kernel_ir = rc->priv;
43c24078 AW	260
	261	if (kernel_ir->cx != NULL)
	262	cx23885_input_ir_stop(kernel_ir->cx);
dbda8f70 AW	263	}
	264
	265	int cx23885_input_init(struct cx23885_dev *dev)
	266	{
43c24078	267	struct cx23885_kernel_ir *kernel_ir;
d8b4b582	268	struct rc_dev *rc;
43c24078	269	char *rc_map;
439be348	270	u64 allowed_protos;
43c24078	271
dbda8f70 AW	272	int ret;
	273
	274	/*
	275	* If the IR device (hardware registers, chip, GPIO lines, etc.) isn't
	276	* encapsulated in a v4l2_subdev, then I'm not going to deal with it.
	277	*/
	278	if (dev->sd_ir == NULL)
	279	return -ENODEV;
	280
	281	switch (dev->board) {
9b3d8ecc	282	case CX23885_BOARD_HAUPPAUGE_HVR1270:
dbda8f70	283	case CX23885_BOARD_HAUPPAUGE_HVR1850:
7fec6fee	284	case CX23885_BOARD_HAUPPAUGE_HVR1290:
98d109f9 AW	285	case CX23885_BOARD_HAUPPAUGE_HVR1250:
98d109f9 AW	286	/* Integrated CX2388[58] IR controller */
8c34b5c4	287	allowed_protos = RC_BIT_ALL_IR_DECODER;
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:
076f0e35 DB	292	/* Integrated CX23885 IR controller */
8c34b5c4	293	allowed_protos = RC_BIT_ALL_IR_DECODER;
076f0e35 DB	294	/* The grey Terratec remote with orange buttons */
	295	rc_map = RC_MAP_NEC_TERRATEC_CINERGY_XS;
	296	break;
98d109f9 AW	297	case CX23885_BOARD_TEVII_S470:
98d109f9 AW	298	/* Integrated CX23885 IR controller */
8c34b5c4	299	allowed_protos = RC_BIT_ALL_IR_DECODER;
98d109f9 AW	300	/* A guess at the remote */
	301	rc_map = RC_MAP_TEVII_NEC;
	302	break;
e5f670b7 AJD	303	case CX23885_BOARD_MYGICA_X8507:
e5f670b7 AJD	304	/* Integrated CX23885 IR controller */
8c34b5c4	305	allowed_protos = RC_BIT_ALL_IR_DECODER;
e5f670b7 AJD	306	/* A guess at the remote */
	307	rc_map = RC_MAP_TOTAL_MEDIA_IN_HAND_02;
	308	break;
e6001482 LA	309	case CX23885_BOARD_TBS_6980:
	310	case CX23885_BOARD_TBS_6981:
	311	/* Integrated CX23885 IR controller */
8c34b5c4	312	allowed_protos = RC_BIT_ALL_IR_DECODER;
e6001482 LA	313	/* A guess at the remote */
	314	rc_map = RC_MAP_TBS_NEC;
	315	break;
d11a3835	316	case CX23885_BOARD_DVBSKY_T9580:
070e6661	317	case CX23885_BOARD_DVBSKY_T980C:
070e6661	318	case CX23885_BOARD_DVBSKY_S950C:
cba5480c	319	case CX23885_BOARD_DVBSKY_S950:
c29d6a83	320	case CX23885_BOARD_DVBSKY_S952:
c02ef64a	321	case CX23885_BOARD_DVBSKY_T982:
d11a3835	322	/* Integrated CX23885 IR controller */
8c34b5c4	323	allowed_protos = RC_BIT_ALL_IR_DECODER;
d11a3835	324	rc_map = RC_MAP_DVBSKY;
d11a3835	325	break;
61b103e8 OS	326	case CX23885_BOARD_TT_CT2_4500_CI:
61b103e8 OS	327	/* Integrated CX23885 IR controller */
8c34b5c4	328	allowed_protos = RC_BIT_ALL_IR_DECODER;
61b103e8 OS	329	rc_map = RC_MAP_TT_1500;
61b103e8 OS	330	break;
43c24078	331	default:
dbda8f70	332	return -ENODEV;
dbda8f70 AW	333	}
dbda8f70 AW	334
43c24078 AW	335	/* cx23885 board instance kernel IR state */
	336	kernel_ir = kzalloc(sizeof(struct cx23885_kernel_ir), GFP_KERNEL);
	337	if (kernel_ir == NULL)
	338	return -ENOMEM;
dbda8f70	339
43c24078 AW	340	kernel_ir->cx = dev;
	341	kernel_ir->name = kasprintf(GFP_KERNEL, "cx23885 IR (%s)",
	342	cx23885_boards[dev->board].name);
	343	kernel_ir->phys = kasprintf(GFP_KERNEL, "pci-%s/ir0",
	344	pci_name(dev->pci));
dbda8f70	345
43c24078	346	/* input device */
0f7499fd	347	rc = rc_allocate_device(RC_DRIVER_IR_RAW);
d8b4b582	348	if (!rc) {
43c24078	349	ret = -ENOMEM;
055cd556	350	goto err_out_free;
43c24078	351	}
055cd556	352
d8b4b582 DH	353	kernel_ir->rc = rc;
	354	rc->input_name = kernel_ir->name;
	355	rc->input_phys = kernel_ir->phys;
	356	rc->input_id.bustype = BUS_PCI;
	357	rc->input_id.version = 1;
dbda8f70	358	if (dev->pci->subsystem_vendor) {
d8b4b582 DH	359	rc->input_id.vendor = dev->pci->subsystem_vendor;
d8b4b582 DH	360	rc->input_id.product = dev->pci->subsystem_device;
dbda8f70	361	} else {
d8b4b582 DH	362	rc->input_id.vendor = dev->pci->vendor;
d8b4b582 DH	363	rc->input_id.product = dev->pci->device;
dbda8f70	364	}
d8b4b582	365	rc->dev.parent = &dev->pci->dev;
c5540fbb	366	rc->allowed_protocols = allowed_protos;
d8b4b582 DH	367	rc->priv = kernel_ir;
	368	rc->open = cx23885_input_ir_open;
	369	rc->close = cx23885_input_ir_close;
	370	rc->map_name = rc_map;
	371	rc->driver_name = MODULE_NAME;
43c24078 AW	372
	373	/* Go */
	374	dev->kernel_ir = kernel_ir;
d8b4b582	375	ret = rc_register_device(rc);
dbda8f70 AW	376	if (ret)
	377	goto err_out_stop;
	378
	379	return 0;
	380
	381	err_out_stop:
	382	cx23885_input_ir_stop(dev);
43c24078	383	dev->kernel_ir = NULL;
d8b4b582	384	rc_free_device(rc);
dbda8f70	385	err_out_free:
43c24078 AW	386	kfree(kernel_ir->phys);
	387	kfree(kernel_ir->name);
	388	kfree(kernel_ir);
dbda8f70 AW	389	return ret;
	390	}
	391
	392	void cx23885_input_fini(struct cx23885_dev *dev)
	393	{
	394	/* Always stop the IR hardware from generating interrupts */
	395	cx23885_input_ir_stop(dev);
	396
43c24078	397	if (dev->kernel_ir == NULL)
dbda8f70	398	return;
d8b4b582	399	rc_unregister_device(dev->kernel_ir->rc);
43c24078 AW	400	kfree(dev->kernel_ir->phys);
	401	kfree(dev->kernel_ir->name);
	402	kfree(dev->kernel_ir);
	403	dev->kernel_ir = NULL;
dbda8f70	404	}