[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@kernel.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:
	case CX23885_BOARD_HAUPPAUGE_HVR1265_K4:
		/*
		 * 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:
	case CX23885_BOARD_HAUPPAUGE_HVR1265_K4:
		/*
		 * 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:
	case CX23885_BOARD_HAUPPAUGE_HVR1265_K4:
		/* Integrated CX2388[58] IR controller */
		allowed_protos = RC_PROTO_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_PROTO_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_PROTO_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_PROTO_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_PROTO_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_PROTO_BIT_ALL_IR_DECODER;
		rc_map = RC_MAP_DVBSKY;
		break;
	case CX23885_BOARD_TT_CT2_4500_CI:
		/* Integrated CX23885 IR controller */
		allowed_protos = RC_PROTO_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);
	if (!kernel_ir->name) {
		ret = -ENOMEM;
		goto err_out_free;
	}

	kernel_ir->phys = kasprintf(GFP_KERNEL, "pci-%s/ir0",
				    pci_name(dev->pci));
	if (!kernel_ir->phys) {
		ret = -ENOMEM;
		goto err_out_free_name;
	}

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

	kernel_ir->rc = rc;
	rc->device_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_phys:
	kfree(kernel_ir->phys);
err_out_free_name:
	kfree(kernel_ir->name);
err_out_free:
	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>
32590819	16	* Mauro Carvalho Chehab <mchehab@kernel.org>
dbda8f70 AW	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:
94f11518	97	case CX23885_BOARD_HAUPPAUGE_HVR1265_K4:
dbda8f70	98	/*
98d109f9	99	* The only boards we handle right now. However other boards
dbda8f70 AW	100	* using the CX2388x integrated IR controller should be similar
	101	*/
	102	break;
	103	default:
	104	return;
	105	}
	106
	107	overrun = events & (V4L2_SUBDEV_IR_RX_SW_FIFO_OVERRUN \|
	108	V4L2_SUBDEV_IR_RX_HW_FIFO_OVERRUN);
	109
	110	data_available = events & (V4L2_SUBDEV_IR_RX_END_OF_RX_DETECTED \|
	111	V4L2_SUBDEV_IR_RX_FIFO_SERVICE_REQ);
	112
	113	if (overrun) {
	114	/* If there was a FIFO overrun, stop the device */
	115	v4l2_subdev_call(dev->sd_ir, ir, rx_g_parameters, &params);
	116	params.enable = false;
	117	/* Mitigate race with cx23885_input_ir_stop() */
	118	params.shutdown = atomic_read(&dev->ir_input_stopping);
	119	v4l2_subdev_call(dev->sd_ir, ir, rx_s_parameters, &params);
	120	}
	121
	122	if (data_available)
43c24078	123	cx23885_input_process_measurements(dev, overrun);
dbda8f70 AW	124
	125	if (overrun) {
	126	/* If there was a FIFO overrun, clear & restart the device */
	127	params.enable = true;
	128	/* Mitigate race with cx23885_input_ir_stop() */
	129	params.shutdown = atomic_read(&dev->ir_input_stopping);
	130	v4l2_subdev_call(dev->sd_ir, ir, rx_s_parameters, &params);
	131	}
	132	}
	133
43c24078	134	static int cx23885_input_ir_start(struct cx23885_dev *dev)
dbda8f70	135	{
dbda8f70 AW	136	struct v4l2_subdev_ir_parameters params;
	137
	138	if (dev->sd_ir == NULL)
43c24078	139	return -ENODEV;
dbda8f70 AW	140
	141	atomic_set(&dev->ir_input_stopping, 0);
	142
dbda8f70 AW	143	v4l2_subdev_call(dev->sd_ir, ir, rx_g_parameters, &params);
dbda8f70 AW	144	switch (dev->board) {
9b3d8ecc	145	case CX23885_BOARD_HAUPPAUGE_HVR1270:
dbda8f70	146	case CX23885_BOARD_HAUPPAUGE_HVR1850:
7fec6fee	147	case CX23885_BOARD_HAUPPAUGE_HVR1290:
98d109f9	148	case CX23885_BOARD_HAUPPAUGE_HVR1250:
e5f670b7	149	case CX23885_BOARD_MYGICA_X8507:
d11a3835	150	case CX23885_BOARD_DVBSKY_T9580:
070e6661	151	case CX23885_BOARD_DVBSKY_T980C:
070e6661	152	case CX23885_BOARD_DVBSKY_S950C:
61b103e8	153	case CX23885_BOARD_TT_CT2_4500_CI:
cba5480c	154	case CX23885_BOARD_DVBSKY_S950:
c29d6a83	155	case CX23885_BOARD_DVBSKY_S952:
c02ef64a	156	case CX23885_BOARD_DVBSKY_T982:
94f11518	157	case CX23885_BOARD_HAUPPAUGE_HVR1265_K4:
dbda8f70 AW	158	/*
	159	* The IR controller on this board only returns pulse widths.
	160	* Any other mode setting will fail to set up the device.
	161	*/
	162	params.mode = V4L2_SUBDEV_IR_MODE_PULSE_WIDTH;
	163	params.enable = true;
	164	params.interrupt_enable = true;
	165	params.shutdown = false;
	166
	167	/* Setup for baseband compatible with both RC-5 and RC-6A */
	168	params.modulation = false;
	169	/* RC-5: 2,222,222 ns = 1/36 kHz * 32 cycles * 2 marks * 1.25*/
	170	/* RC-6A: 3,333,333 ns = 1/36 kHz * 16 cycles * 6 marks * 1.25*/
	171	params.max_pulse_width = 3333333; /* ns */
	172	/* RC-5: 666,667 ns = 1/36 kHz * 32 cycles * 1 mark * 0.75 */
	173	/* RC-6A: 333,333 ns = 1/36 kHz * 16 cycles * 1 mark * 0.75 */
	174	params.noise_filter_min_width = 333333; /* ns */
	175	/*
	176	* This board has inverted receive sense:
	177	* mark is received as low logic level;
	178	* falling edges are detected as rising edges; etc.
	179	*/
5a28d9a3	180	params.invert_level = true;
dbda8f70	181	break;
076f0e35	182	case CX23885_BOARD_TERRATEC_CINERGY_T_PCIE_DUAL:
98d109f9	183	case CX23885_BOARD_TEVII_S470:
e6001482 LA	184	case CX23885_BOARD_TBS_6980:
e6001482 LA	185	case CX23885_BOARD_TBS_6981:
98d109f9 AW	186	/*
	187	* The IR controller on this board only returns pulse widths.
	188	* Any other mode setting will fail to set up the device.
	189	*/
	190	params.mode = V4L2_SUBDEV_IR_MODE_PULSE_WIDTH;
	191	params.enable = true;
	192	params.interrupt_enable = true;
	193	params.shutdown = false;
	194
	195	/* Setup for a standard NEC protocol */
	196	params.carrier_freq = 37917; /* Hz, 455 kHz/12 for NEC */
	197	params.carrier_range_lower = 33000; /* Hz */
	198	params.carrier_range_upper = 43000; /* Hz */
	199	params.duty_cycle = 33; /* percent, 33 percent for NEC */
	200
	201	/*
	202	* NEC max pulse width: (64/3)/(455 kHz/12) * 16 nec_units
	203	* (64/3)/(455 kHz/12) * 16 nec_units * 1.375 = 12378022 ns
	204	*/
	205	params.max_pulse_width = 12378022; /* ns */
	206
	207	/*
	208	* NEC noise filter min width: (64/3)/(455 kHz/12) * 1 nec_unit
	209	* (64/3)/(455 kHz/12) * 1 nec_units * 0.625 = 351648 ns
	210	*/
	211	params.noise_filter_min_width = 351648; /* ns */
	212
	213	params.modulation = false;
	214	params.invert_level = true;
	215	break;
dbda8f70 AW	216	}
dbda8f70 AW	217	v4l2_subdev_call(dev->sd_ir, ir, rx_s_parameters, &params);
43c24078 AW	218	return 0;
	219	}
	220
d8b4b582	221	static int cx23885_input_ir_open(struct rc_dev *rc)
43c24078	222	{
d8b4b582	223	struct cx23885_kernel_ir *kernel_ir = rc->priv;
43c24078 AW	224
	225	if (kernel_ir->cx == NULL)
	226	return -ENODEV;
	227
	228	return cx23885_input_ir_start(kernel_ir->cx);
dbda8f70 AW	229	}
	230
	231	static void cx23885_input_ir_stop(struct cx23885_dev *dev)
	232	{
dbda8f70 AW	233	struct v4l2_subdev_ir_parameters params;
	234
	235	if (dev->sd_ir == NULL)
	236	return;
	237
	238	/*
	239	* Stop the sd_ir subdevice from generating notifications and
	240	* scheduling work.
	241	* It is shutdown this way in order to mitigate a race with
	242	* cx23885_input_rx_work_handler() in the overrun case, which could
	243	* re-enable the subdevice.
	244	*/
	245	atomic_set(&dev->ir_input_stopping, 1);
	246	v4l2_subdev_call(dev->sd_ir, ir, rx_g_parameters, &params);
	247	while (params.shutdown == false) {
	248	params.enable = false;
	249	params.interrupt_enable = false;
	250	params.shutdown = true;
	251	v4l2_subdev_call(dev->sd_ir, ir, rx_s_parameters, &params);
	252	v4l2_subdev_call(dev->sd_ir, ir, rx_g_parameters, &params);
	253	}
43829731 TH	254	flush_work(&dev->cx25840_work);
	255	flush_work(&dev->ir_rx_work);
	256	flush_work(&dev->ir_tx_work);
43c24078	257	}
dbda8f70	258
d8b4b582	259	static void cx23885_input_ir_close(struct rc_dev *rc)
43c24078	260	{
d8b4b582	261	struct cx23885_kernel_ir *kernel_ir = rc->priv;
43c24078 AW	262
	263	if (kernel_ir->cx != NULL)
	264	cx23885_input_ir_stop(kernel_ir->cx);
dbda8f70 AW	265	}
	266
	267	int cx23885_input_init(struct cx23885_dev *dev)
	268	{
43c24078	269	struct cx23885_kernel_ir *kernel_ir;
d8b4b582	270	struct rc_dev *rc;
43c24078	271	char *rc_map;
439be348	272	u64 allowed_protos;
43c24078	273
dbda8f70 AW	274	int ret;
	275
	276	/*
	277	* If the IR device (hardware registers, chip, GPIO lines, etc.) isn't
	278	* encapsulated in a v4l2_subdev, then I'm not going to deal with it.
	279	*/
	280	if (dev->sd_ir == NULL)
	281	return -ENODEV;
	282
	283	switch (dev->board) {
9b3d8ecc	284	case CX23885_BOARD_HAUPPAUGE_HVR1270:
dbda8f70	285	case CX23885_BOARD_HAUPPAUGE_HVR1850:
7fec6fee	286	case CX23885_BOARD_HAUPPAUGE_HVR1290:
98d109f9	287	case CX23885_BOARD_HAUPPAUGE_HVR1250:
94f11518	288	case CX23885_BOARD_HAUPPAUGE_HVR1265_K4:
98d109f9	289	/* Integrated CX2388[58] IR controller */
6d741bfe	290	allowed_protos = RC_PROTO_BIT_ALL_IR_DECODER;
43c24078	291	/* The grey Hauppauge RC-5 remote */
15195d3a	292	rc_map = RC_MAP_HAUPPAUGE;
dbda8f70	293	break;
076f0e35 DB	294	case CX23885_BOARD_TERRATEC_CINERGY_T_PCIE_DUAL:
076f0e35 DB	295	/* Integrated CX23885 IR controller */
6d741bfe	296	allowed_protos = RC_PROTO_BIT_ALL_IR_DECODER;
076f0e35 DB	297	/* The grey Terratec remote with orange buttons */
	298	rc_map = RC_MAP_NEC_TERRATEC_CINERGY_XS;
	299	break;
98d109f9 AW	300	case CX23885_BOARD_TEVII_S470:
98d109f9 AW	301	/* Integrated CX23885 IR controller */
6d741bfe	302	allowed_protos = RC_PROTO_BIT_ALL_IR_DECODER;
98d109f9 AW	303	/* A guess at the remote */
	304	rc_map = RC_MAP_TEVII_NEC;
	305	break;
e5f670b7 AJD	306	case CX23885_BOARD_MYGICA_X8507:
e5f670b7 AJD	307	/* Integrated CX23885 IR controller */
6d741bfe	308	allowed_protos = RC_PROTO_BIT_ALL_IR_DECODER;
e5f670b7 AJD	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 */
6d741bfe	315	allowed_protos = RC_PROTO_BIT_ALL_IR_DECODER;
e6001482 LA	316	/* A guess at the remote */
	317	rc_map = RC_MAP_TBS_NEC;
	318	break;
d11a3835	319	case CX23885_BOARD_DVBSKY_T9580:
070e6661	320	case CX23885_BOARD_DVBSKY_T980C:
070e6661	321	case CX23885_BOARD_DVBSKY_S950C:
cba5480c	322	case CX23885_BOARD_DVBSKY_S950:
c29d6a83	323	case CX23885_BOARD_DVBSKY_S952:
c02ef64a	324	case CX23885_BOARD_DVBSKY_T982:
d11a3835	325	/* Integrated CX23885 IR controller */
6d741bfe	326	allowed_protos = RC_PROTO_BIT_ALL_IR_DECODER;
d11a3835	327	rc_map = RC_MAP_DVBSKY;
d11a3835	328	break;
61b103e8 OS	329	case CX23885_BOARD_TT_CT2_4500_CI:
61b103e8 OS	330	/* Integrated CX23885 IR controller */
6d741bfe	331	allowed_protos = RC_PROTO_BIT_ALL_IR_DECODER;
61b103e8 OS	332	rc_map = RC_MAP_TT_1500;
61b103e8 OS	333	break;
43c24078	334	default:
dbda8f70	335	return -ENODEV;
dbda8f70 AW	336	}
dbda8f70 AW	337
43c24078 AW	338	/* cx23885 board instance kernel IR state */
	339	kernel_ir = kzalloc(sizeof(struct cx23885_kernel_ir), GFP_KERNEL);
	340	if (kernel_ir == NULL)
	341	return -ENOMEM;
dbda8f70	342
43c24078 AW	343	kernel_ir->cx = dev;
	344	kernel_ir->name = kasprintf(GFP_KERNEL, "cx23885 IR (%s)",
	345	cx23885_boards[dev->board].name);
1ee332ac AY	346	if (!kernel_ir->name) {
	347	ret = -ENOMEM;
	348	goto err_out_free;
	349	}
	350
43c24078 AW	351	kernel_ir->phys = kasprintf(GFP_KERNEL, "pci-%s/ir0",
43c24078 AW	352	pci_name(dev->pci));
1ee332ac AY	353	if (!kernel_ir->phys) {
	354	ret = -ENOMEM;
	355	goto err_out_free_name;
	356	}
dbda8f70	357
43c24078	358	/* input device */
0f7499fd	359	rc = rc_allocate_device(RC_DRIVER_IR_RAW);
d8b4b582	360	if (!rc) {
43c24078	361	ret = -ENOMEM;
1ee332ac	362	goto err_out_free_phys;
43c24078	363	}
055cd556	364
d8b4b582	365	kernel_ir->rc = rc;
518f4b26	366	rc->device_name = kernel_ir->name;
d8b4b582 DH	367	rc->input_phys = kernel_ir->phys;
	368	rc->input_id.bustype = BUS_PCI;
	369	rc->input_id.version = 1;
dbda8f70	370	if (dev->pci->subsystem_vendor) {
d8b4b582 DH	371	rc->input_id.vendor = dev->pci->subsystem_vendor;
d8b4b582 DH	372	rc->input_id.product = dev->pci->subsystem_device;
dbda8f70	373	} else {
d8b4b582 DH	374	rc->input_id.vendor = dev->pci->vendor;
d8b4b582 DH	375	rc->input_id.product = dev->pci->device;
dbda8f70	376	}
d8b4b582	377	rc->dev.parent = &dev->pci->dev;
c5540fbb	378	rc->allowed_protocols = allowed_protos;
d8b4b582 DH	379	rc->priv = kernel_ir;
	380	rc->open = cx23885_input_ir_open;
	381	rc->close = cx23885_input_ir_close;
	382	rc->map_name = rc_map;
	383	rc->driver_name = MODULE_NAME;
43c24078 AW	384
	385	/* Go */
	386	dev->kernel_ir = kernel_ir;
d8b4b582	387	ret = rc_register_device(rc);
dbda8f70 AW	388	if (ret)
	389	goto err_out_stop;
	390
	391	return 0;
	392
	393	err_out_stop:
	394	cx23885_input_ir_stop(dev);
43c24078	395	dev->kernel_ir = NULL;
d8b4b582	396	rc_free_device(rc);
1ee332ac	397	err_out_free_phys:
43c24078	398	kfree(kernel_ir->phys);
1ee332ac	399	err_out_free_name:
43c24078	400	kfree(kernel_ir->name);
1ee332ac	401	err_out_free:
43c24078	402	kfree(kernel_ir);
dbda8f70 AW	403	return ret;
	404	}
	405
	406	void cx23885_input_fini(struct cx23885_dev *dev)
	407	{
	408	/* Always stop the IR hardware from generating interrupts */
	409	cx23885_input_ir_stop(dev);
	410
43c24078	411	if (dev->kernel_ir == NULL)
dbda8f70	412	return;
d8b4b582	413	rc_unregister_device(dev->kernel_ir->rc);
43c24078 AW	414	kfree(dev->kernel_ir->phys);
	415	kfree(dev->kernel_ir->name);
	416	kfree(dev->kernel_ir);
	417	dev->kernel_ir = NULL;
dbda8f70	418	}