[deliverable/linux.git] / drivers / media / video / 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.
 *
 *  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., 51 Franklin Street, Fifth Floor, Boston, MA
 *  02110-1301, USA.
 */

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

#include "cx23885.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_TEVII_S470:
	case CX23885_BOARD_HAUPPAUGE_HVR1250:
		/*
		 * 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:
		/*
		 * 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_TEVII_S470:
		/*
		 * 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_TYPE_ALL;
		/* The grey Hauppauge RC-5 remote */
		rc_map = RC_MAP_HAUPPAUGE;
		break;
	case CX23885_BOARD_TEVII_S470:
		/* Integrated CX23885 IR controller */
		driver_type = RC_DRIVER_IR_RAW;
		allowed_protos = RC_TYPE_ALL;
		/* A guess at the remote */
		rc_map = RC_MAP_TEVII_NEC;
		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_protos = 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.
	31	*
	32	* You should have received a copy of the GNU General Public License
	33	* along with this program; if not, write to the Free Software
	34	* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
	35	* 02110-1301, USA.
	36	*/
	37
5a0e3ad6	38	#include <linux/slab.h>
6bda9644	39	#include <media/rc-core.h>
dbda8f70 AW	40	#include <media/v4l2-subdev.h>
	41
	42	#include "cx23885.h"
	43
727e625c MCC	44	#define MODULE_NAME "cx23885"
727e625c MCC	45
43c24078 AW	46	static void cx23885_input_process_measurements(struct cx23885_dev *dev,
43c24078 AW	47	bool overrun)
dbda8f70	48	{
43c24078	49	struct cx23885_kernel_ir *kernel_ir = dev->kernel_ir;
dbda8f70	50
43c24078	51	ssize_t num;
dbda8f70	52	int count, i;
43c24078	53	bool handle = false;
c02e0d12	54	struct ir_raw_event ir_core_event[64];
dbda8f70 AW	55
dbda8f70 AW	56	do {
43c24078	57	num = 0;
c02e0d12 AW	58	v4l2_subdev_call(dev->sd_ir, ir, rx_read, (u8 *) ir_core_event,
c02e0d12 AW	59	sizeof(ir_core_event), &num);
dbda8f70	60
c02e0d12	61	count = num / sizeof(struct ir_raw_event);
dbda8f70	62
43c24078	63	for (i = 0; i < count; i++) {
d8b4b582	64	ir_raw_event_store(kernel_ir->rc,
c02e0d12	65	&ir_core_event[i]);
43c24078	66	handle = true;
dbda8f70	67	}
dbda8f70	68	} while (num != 0);
43c24078 AW	69
43c24078 AW	70	if (overrun)
d8b4b582	71	ir_raw_event_reset(kernel_ir->rc);
43c24078	72	else if (handle)
d8b4b582	73	ir_raw_event_handle(kernel_ir->rc);
dbda8f70 AW	74	}
	75
	76	void cx23885_input_rx_work_handler(struct cx23885_dev *dev, u32 events)
	77	{
	78	struct v4l2_subdev_ir_parameters params;
	79	int overrun, data_available;
	80
	81	if (dev->sd_ir == NULL \|\| events == 0)
	82	return;
	83
	84	switch (dev->board) {
9b3d8ecc	85	case CX23885_BOARD_HAUPPAUGE_HVR1270:
dbda8f70	86	case CX23885_BOARD_HAUPPAUGE_HVR1850:
7fec6fee	87	case CX23885_BOARD_HAUPPAUGE_HVR1290:
98d109f9 AW	88	case CX23885_BOARD_TEVII_S470:
98d109f9 AW	89	case CX23885_BOARD_HAUPPAUGE_HVR1250:
dbda8f70	90	/*
98d109f9	91	* The only boards we handle right now. However other boards
dbda8f70 AW	92	* using the CX2388x integrated IR controller should be similar
	93	*/
	94	break;
	95	default:
	96	return;
	97	}
	98
	99	overrun = events & (V4L2_SUBDEV_IR_RX_SW_FIFO_OVERRUN \|
	100	V4L2_SUBDEV_IR_RX_HW_FIFO_OVERRUN);
	101
	102	data_available = events & (V4L2_SUBDEV_IR_RX_END_OF_RX_DETECTED \|
	103	V4L2_SUBDEV_IR_RX_FIFO_SERVICE_REQ);
	104
	105	if (overrun) {
	106	/* If there was a FIFO overrun, stop the device */
	107	v4l2_subdev_call(dev->sd_ir, ir, rx_g_parameters, &params);
	108	params.enable = false;
	109	/* Mitigate race with cx23885_input_ir_stop() */
	110	params.shutdown = atomic_read(&dev->ir_input_stopping);
	111	v4l2_subdev_call(dev->sd_ir, ir, rx_s_parameters, &params);
	112	}
	113
	114	if (data_available)
43c24078	115	cx23885_input_process_measurements(dev, overrun);
dbda8f70 AW	116
	117	if (overrun) {
	118	/* If there was a FIFO overrun, clear & restart the device */
	119	params.enable = true;
	120	/* Mitigate race with cx23885_input_ir_stop() */
	121	params.shutdown = atomic_read(&dev->ir_input_stopping);
	122	v4l2_subdev_call(dev->sd_ir, ir, rx_s_parameters, &params);
	123	}
	124	}
	125
43c24078	126	static int cx23885_input_ir_start(struct cx23885_dev *dev)
dbda8f70	127	{
dbda8f70 AW	128	struct v4l2_subdev_ir_parameters params;
	129
	130	if (dev->sd_ir == NULL)
43c24078	131	return -ENODEV;
dbda8f70 AW	132
	133	atomic_set(&dev->ir_input_stopping, 0);
	134
dbda8f70 AW	135	v4l2_subdev_call(dev->sd_ir, ir, rx_g_parameters, &params);
dbda8f70 AW	136	switch (dev->board) {
9b3d8ecc	137	case CX23885_BOARD_HAUPPAUGE_HVR1270:
dbda8f70	138	case CX23885_BOARD_HAUPPAUGE_HVR1850:
7fec6fee	139	case CX23885_BOARD_HAUPPAUGE_HVR1290:
98d109f9	140	case CX23885_BOARD_HAUPPAUGE_HVR1250:
dbda8f70 AW	141	/*
	142	* The IR controller on this board only returns pulse widths.
	143	* Any other mode setting will fail to set up the device.
	144	*/
	145	params.mode = V4L2_SUBDEV_IR_MODE_PULSE_WIDTH;
	146	params.enable = true;
	147	params.interrupt_enable = true;
	148	params.shutdown = false;
	149
	150	/* Setup for baseband compatible with both RC-5 and RC-6A */
	151	params.modulation = false;
	152	/* RC-5: 2,222,222 ns = 1/36 kHz * 32 cycles * 2 marks * 1.25*/
	153	/* RC-6A: 3,333,333 ns = 1/36 kHz * 16 cycles * 6 marks * 1.25*/
	154	params.max_pulse_width = 3333333; /* ns */
	155	/* RC-5: 666,667 ns = 1/36 kHz * 32 cycles * 1 mark * 0.75 */
	156	/* RC-6A: 333,333 ns = 1/36 kHz * 16 cycles * 1 mark * 0.75 */
	157	params.noise_filter_min_width = 333333; /* ns */
	158	/*
	159	* This board has inverted receive sense:
	160	* mark is received as low logic level;
	161	* falling edges are detected as rising edges; etc.
	162	*/
5a28d9a3	163	params.invert_level = true;
dbda8f70	164	break;
98d109f9 AW	165	case CX23885_BOARD_TEVII_S470:
	166	/*
	167	* The IR controller on this board only returns pulse widths.
	168	* Any other mode setting will fail to set up the device.
	169	*/
	170	params.mode = V4L2_SUBDEV_IR_MODE_PULSE_WIDTH;
	171	params.enable = true;
	172	params.interrupt_enable = true;
	173	params.shutdown = false;
	174
	175	/* Setup for a standard NEC protocol */
	176	params.carrier_freq = 37917; /* Hz, 455 kHz/12 for NEC */
	177	params.carrier_range_lower = 33000; /* Hz */
	178	params.carrier_range_upper = 43000; /* Hz */
	179	params.duty_cycle = 33; /* percent, 33 percent for NEC */
	180
	181	/*
	182	* NEC max pulse width: (64/3)/(455 kHz/12) * 16 nec_units
	183	* (64/3)/(455 kHz/12) * 16 nec_units * 1.375 = 12378022 ns
	184	*/
	185	params.max_pulse_width = 12378022; /* ns */
	186
	187	/*
	188	* NEC noise filter min width: (64/3)/(455 kHz/12) * 1 nec_unit
	189	* (64/3)/(455 kHz/12) * 1 nec_units * 0.625 = 351648 ns
	190	*/
	191	params.noise_filter_min_width = 351648; /* ns */
	192
	193	params.modulation = false;
	194	params.invert_level = true;
	195	break;
dbda8f70 AW	196	}
dbda8f70 AW	197	v4l2_subdev_call(dev->sd_ir, ir, rx_s_parameters, &params);
43c24078 AW	198	return 0;
	199	}
	200
d8b4b582	201	static int cx23885_input_ir_open(struct rc_dev *rc)
43c24078	202	{
d8b4b582	203	struct cx23885_kernel_ir *kernel_ir = rc->priv;
43c24078 AW	204
	205	if (kernel_ir->cx == NULL)
	206	return -ENODEV;
	207
	208	return cx23885_input_ir_start(kernel_ir->cx);
dbda8f70 AW	209	}
	210
	211	static void cx23885_input_ir_stop(struct cx23885_dev *dev)
	212	{
dbda8f70 AW	213	struct v4l2_subdev_ir_parameters params;
	214
	215	if (dev->sd_ir == NULL)
	216	return;
	217
	218	/*
	219	* Stop the sd_ir subdevice from generating notifications and
	220	* scheduling work.
	221	* It is shutdown this way in order to mitigate a race with
	222	* cx23885_input_rx_work_handler() in the overrun case, which could
	223	* re-enable the subdevice.
	224	*/
	225	atomic_set(&dev->ir_input_stopping, 1);
	226	v4l2_subdev_call(dev->sd_ir, ir, rx_g_parameters, &params);
	227	while (params.shutdown == false) {
	228	params.enable = false;
	229	params.interrupt_enable = false;
	230	params.shutdown = true;
	231	v4l2_subdev_call(dev->sd_ir, ir, rx_s_parameters, &params);
	232	v4l2_subdev_call(dev->sd_ir, ir, rx_g_parameters, &params);
	233	}
43829731 TH	234	flush_work(&dev->cx25840_work);
	235	flush_work(&dev->ir_rx_work);
	236	flush_work(&dev->ir_tx_work);
43c24078	237	}
dbda8f70	238
d8b4b582	239	static void cx23885_input_ir_close(struct rc_dev *rc)
43c24078	240	{
d8b4b582	241	struct cx23885_kernel_ir *kernel_ir = rc->priv;
43c24078 AW	242
	243	if (kernel_ir->cx != NULL)
	244	cx23885_input_ir_stop(kernel_ir->cx);
dbda8f70 AW	245	}
	246
	247	int cx23885_input_init(struct cx23885_dev *dev)
	248	{
43c24078	249	struct cx23885_kernel_ir *kernel_ir;
d8b4b582	250	struct rc_dev *rc;
43c24078 AW	251	char *rc_map;
	252	enum rc_driver_type driver_type;
	253	unsigned long allowed_protos;
	254
dbda8f70 AW	255	int ret;
	256
	257	/*
	258	* If the IR device (hardware registers, chip, GPIO lines, etc.) isn't
	259	* encapsulated in a v4l2_subdev, then I'm not going to deal with it.
	260	*/
	261	if (dev->sd_ir == NULL)
	262	return -ENODEV;
	263
	264	switch (dev->board) {
9b3d8ecc	265	case CX23885_BOARD_HAUPPAUGE_HVR1270:
dbda8f70	266	case CX23885_BOARD_HAUPPAUGE_HVR1850:
7fec6fee	267	case CX23885_BOARD_HAUPPAUGE_HVR1290:
98d109f9 AW	268	case CX23885_BOARD_HAUPPAUGE_HVR1250:
98d109f9 AW	269	/* Integrated CX2388[58] IR controller */
43c24078	270	driver_type = RC_DRIVER_IR_RAW;
52b66144	271	allowed_protos = RC_TYPE_ALL;
43c24078	272	/* The grey Hauppauge RC-5 remote */
15195d3a	273	rc_map = RC_MAP_HAUPPAUGE;
dbda8f70	274	break;
98d109f9 AW	275	case CX23885_BOARD_TEVII_S470:
	276	/* Integrated CX23885 IR controller */
	277	driver_type = RC_DRIVER_IR_RAW;
52b66144	278	allowed_protos = RC_TYPE_ALL;
98d109f9 AW	279	/* A guess at the remote */
	280	rc_map = RC_MAP_TEVII_NEC;
	281	break;
43c24078	282	default:
dbda8f70	283	return -ENODEV;
dbda8f70 AW	284	}
dbda8f70 AW	285
43c24078 AW	286	/* cx23885 board instance kernel IR state */
	287	kernel_ir = kzalloc(sizeof(struct cx23885_kernel_ir), GFP_KERNEL);
	288	if (kernel_ir == NULL)
	289	return -ENOMEM;
dbda8f70	290
43c24078 AW	291	kernel_ir->cx = dev;
	292	kernel_ir->name = kasprintf(GFP_KERNEL, "cx23885 IR (%s)",
	293	cx23885_boards[dev->board].name);
	294	kernel_ir->phys = kasprintf(GFP_KERNEL, "pci-%s/ir0",
	295	pci_name(dev->pci));
dbda8f70	296
43c24078	297	/* input device */
d8b4b582 DH	298	rc = rc_allocate_device();
d8b4b582 DH	299	if (!rc) {
43c24078	300	ret = -ENOMEM;
055cd556	301	goto err_out_free;
43c24078	302	}
055cd556	303
d8b4b582 DH	304	kernel_ir->rc = rc;
	305	rc->input_name = kernel_ir->name;
	306	rc->input_phys = kernel_ir->phys;
	307	rc->input_id.bustype = BUS_PCI;
	308	rc->input_id.version = 1;
dbda8f70	309	if (dev->pci->subsystem_vendor) {
d8b4b582 DH	310	rc->input_id.vendor = dev->pci->subsystem_vendor;
d8b4b582 DH	311	rc->input_id.product = dev->pci->subsystem_device;
dbda8f70	312	} else {
d8b4b582 DH	313	rc->input_id.vendor = dev->pci->vendor;
d8b4b582 DH	314	rc->input_id.product = dev->pci->device;
dbda8f70	315	}
d8b4b582 DH	316	rc->dev.parent = &dev->pci->dev;
	317	rc->driver_type = driver_type;
	318	rc->allowed_protos = allowed_protos;
	319	rc->priv = kernel_ir;
	320	rc->open = cx23885_input_ir_open;
	321	rc->close = cx23885_input_ir_close;
	322	rc->map_name = rc_map;
	323	rc->driver_name = MODULE_NAME;
43c24078 AW	324
	325	/* Go */
	326	dev->kernel_ir = kernel_ir;
d8b4b582	327	ret = rc_register_device(rc);
dbda8f70 AW	328	if (ret)
	329	goto err_out_stop;
	330
	331	return 0;
	332
	333	err_out_stop:
	334	cx23885_input_ir_stop(dev);
43c24078	335	dev->kernel_ir = NULL;
d8b4b582	336	rc_free_device(rc);
dbda8f70	337	err_out_free:
43c24078 AW	338	kfree(kernel_ir->phys);
	339	kfree(kernel_ir->name);
	340	kfree(kernel_ir);
dbda8f70 AW	341	return ret;
	342	}
	343
	344	void cx23885_input_fini(struct cx23885_dev *dev)
	345	{
	346	/* Always stop the IR hardware from generating interrupts */
	347	cx23885_input_ir_stop(dev);
	348
43c24078	349	if (dev->kernel_ir == NULL)
dbda8f70	350	return;
d8b4b582	351	rc_unregister_device(dev->kernel_ir->rc);
43c24078 AW	352	kfree(dev->kernel_ir->phys);
	353	kfree(dev->kernel_ir->name);
	354	kfree(dev->kernel_ir);
	355	dev->kernel_ir = NULL;
dbda8f70	356	}