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

/*
 *  Driver for the Conexant CX23885/7/8 PCIe bridge
 *
 *  Infrared device support routines - non-input, non-vl42_subdev routines
 *
 *  Copyright (C) 2009  Andy Walls <awalls@md.metrocast.net>
 *
 *  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 <media/v4l2-device.h>

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

#define CX23885_IR_RX_FIFO_SERVICE_REQ		0
#define CX23885_IR_RX_END_OF_RX_DETECTED	1
#define CX23885_IR_RX_HW_FIFO_OVERRUN		2
#define CX23885_IR_RX_SW_FIFO_OVERRUN		3

#define CX23885_IR_TX_FIFO_SERVICE_REQ		0


void cx23885_ir_rx_work_handler(struct work_struct *work)
{
	struct cx23885_dev *dev =
			     container_of(work, struct cx23885_dev, ir_rx_work);
	u32 events = 0;
	unsigned long *notifications = &dev->ir_rx_notifications;

	if (test_and_clear_bit(CX23885_IR_RX_SW_FIFO_OVERRUN, notifications))
		events |= V4L2_SUBDEV_IR_RX_SW_FIFO_OVERRUN;
	if (test_and_clear_bit(CX23885_IR_RX_HW_FIFO_OVERRUN, notifications))
		events |= V4L2_SUBDEV_IR_RX_HW_FIFO_OVERRUN;
	if (test_and_clear_bit(CX23885_IR_RX_END_OF_RX_DETECTED, notifications))
		events |= V4L2_SUBDEV_IR_RX_END_OF_RX_DETECTED;
	if (test_and_clear_bit(CX23885_IR_RX_FIFO_SERVICE_REQ, notifications))
		events |= V4L2_SUBDEV_IR_RX_FIFO_SERVICE_REQ;

	if (events == 0)
		return;

	if (dev->kernel_ir)
		cx23885_input_rx_work_handler(dev, events);
}

void cx23885_ir_tx_work_handler(struct work_struct *work)
{
	struct cx23885_dev *dev =
			     container_of(work, struct cx23885_dev, ir_tx_work);
	u32 events = 0;
	unsigned long *notifications = &dev->ir_tx_notifications;

	if (test_and_clear_bit(CX23885_IR_TX_FIFO_SERVICE_REQ, notifications))
		events |= V4L2_SUBDEV_IR_TX_FIFO_SERVICE_REQ;

	if (events == 0)
		return;

}

/* Possibly called in an IRQ context */
void cx23885_ir_rx_v4l2_dev_notify(struct v4l2_subdev *sd, u32 events)
{
	struct cx23885_dev *dev = to_cx23885(sd->v4l2_dev);
	unsigned long *notifications = &dev->ir_rx_notifications;

	if (events & V4L2_SUBDEV_IR_RX_FIFO_SERVICE_REQ)
		set_bit(CX23885_IR_RX_FIFO_SERVICE_REQ, notifications);
	if (events & V4L2_SUBDEV_IR_RX_END_OF_RX_DETECTED)
		set_bit(CX23885_IR_RX_END_OF_RX_DETECTED, notifications);
	if (events & V4L2_SUBDEV_IR_RX_HW_FIFO_OVERRUN)
		set_bit(CX23885_IR_RX_HW_FIFO_OVERRUN, notifications);
	if (events & V4L2_SUBDEV_IR_RX_SW_FIFO_OVERRUN)
		set_bit(CX23885_IR_RX_SW_FIFO_OVERRUN, notifications);

	/*
	 * For the integrated AV core, we are already in a workqueue context.
	 * For the CX23888 integrated IR, we are in an interrupt context.
	 */
	if (sd == dev->sd_cx25840)
		cx23885_ir_rx_work_handler(&dev->ir_rx_work);
	else
		schedule_work(&dev->ir_rx_work);
}

/* Possibly called in an IRQ context */
void cx23885_ir_tx_v4l2_dev_notify(struct v4l2_subdev *sd, u32 events)
{
	struct cx23885_dev *dev = to_cx23885(sd->v4l2_dev);
	unsigned long *notifications = &dev->ir_tx_notifications;

	if (events & V4L2_SUBDEV_IR_TX_FIFO_SERVICE_REQ)
		set_bit(CX23885_IR_TX_FIFO_SERVICE_REQ, notifications);

	/*
	 * For the integrated AV core, we are already in a workqueue context.
	 * For the CX23888 integrated IR, we are in an interrupt context.
	 */
	if (sd == dev->sd_cx25840)
		cx23885_ir_tx_work_handler(&dev->ir_tx_work);
	else
		schedule_work(&dev->ir_tx_work);
}
Commit	Line	Data
f59ad611 AW	1	/*
	2	* Driver for the Conexant CX23885/7/8 PCIe bridge
	3	*
	4	* Infrared device support routines - non-input, non-vl42_subdev routines
	5	*
6afdeaf8	6	* Copyright (C) 2009 Andy Walls <awalls@md.metrocast.net>
f59ad611 AW	7	*
	8	* This program is free software; you can redistribute it and/or
	9	* modify it under the terms of the GNU General Public License
	10	* as published by the Free Software Foundation; either version 2
	11	* of the License, or (at your option) any later version.
	12	*
	13	* This program is distributed in the hope that it will be useful,
	14	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	15	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	16	* GNU General Public License for more details.
f59ad611 AW	17	*/
	18
	19	#include <media/v4l2-device.h>
	20
	21	#include "cx23885.h"
ada73eee	22	#include "cx23885-ir.h"
dbda8f70	23	#include "cx23885-input.h"
f59ad611 AW	24
	25	#define CX23885_IR_RX_FIFO_SERVICE_REQ 0
	26	#define CX23885_IR_RX_END_OF_RX_DETECTED 1
	27	#define CX23885_IR_RX_HW_FIFO_OVERRUN 2
	28	#define CX23885_IR_RX_SW_FIFO_OVERRUN 3
	29
	30	#define CX23885_IR_TX_FIFO_SERVICE_REQ 0
	31
	32
	33	void cx23885_ir_rx_work_handler(struct work_struct *work)
	34	{
	35	struct cx23885_dev *dev =
	36	container_of(work, struct cx23885_dev, ir_rx_work);
	37	u32 events = 0;
	38	unsigned long *notifications = &dev->ir_rx_notifications;
	39
	40	if (test_and_clear_bit(CX23885_IR_RX_SW_FIFO_OVERRUN, notifications))
	41	events \|= V4L2_SUBDEV_IR_RX_SW_FIFO_OVERRUN;
	42	if (test_and_clear_bit(CX23885_IR_RX_HW_FIFO_OVERRUN, notifications))
	43	events \|= V4L2_SUBDEV_IR_RX_HW_FIFO_OVERRUN;
	44	if (test_and_clear_bit(CX23885_IR_RX_END_OF_RX_DETECTED, notifications))
	45	events \|= V4L2_SUBDEV_IR_RX_END_OF_RX_DETECTED;
	46	if (test_and_clear_bit(CX23885_IR_RX_FIFO_SERVICE_REQ, notifications))
	47	events \|= V4L2_SUBDEV_IR_RX_FIFO_SERVICE_REQ;
	48
	49	if (events == 0)
	50	return;
dbda8f70	51
43c24078	52	if (dev->kernel_ir)
dbda8f70	53	cx23885_input_rx_work_handler(dev, events);
f59ad611 AW	54	}
	55
	56	void cx23885_ir_tx_work_handler(struct work_struct *work)
	57	{
	58	struct cx23885_dev *dev =
	59	container_of(work, struct cx23885_dev, ir_tx_work);
	60	u32 events = 0;
	61	unsigned long *notifications = &dev->ir_tx_notifications;
	62
	63	if (test_and_clear_bit(CX23885_IR_TX_FIFO_SERVICE_REQ, notifications))
	64	events \|= V4L2_SUBDEV_IR_TX_FIFO_SERVICE_REQ;
	65
	66	if (events == 0)
	67	return;
	68
	69	}
	70
e5514f10	71	/* Possibly called in an IRQ context */
f59ad611 AW	72	void cx23885_ir_rx_v4l2_dev_notify(struct v4l2_subdev *sd, u32 events)
	73	{
	74	struct cx23885_dev *dev = to_cx23885(sd->v4l2_dev);
	75	unsigned long *notifications = &dev->ir_rx_notifications;
	76
	77	if (events & V4L2_SUBDEV_IR_RX_FIFO_SERVICE_REQ)
	78	set_bit(CX23885_IR_RX_FIFO_SERVICE_REQ, notifications);
	79	if (events & V4L2_SUBDEV_IR_RX_END_OF_RX_DETECTED)
	80	set_bit(CX23885_IR_RX_END_OF_RX_DETECTED, notifications);
	81	if (events & V4L2_SUBDEV_IR_RX_HW_FIFO_OVERRUN)
	82	set_bit(CX23885_IR_RX_HW_FIFO_OVERRUN, notifications);
	83	if (events & V4L2_SUBDEV_IR_RX_SW_FIFO_OVERRUN)
	84	set_bit(CX23885_IR_RX_SW_FIFO_OVERRUN, notifications);
e5514f10 AW	85
	86	/*
	87	* For the integrated AV core, we are already in a workqueue context.
	88	* For the CX23888 integrated IR, we are in an interrupt context.
	89	*/
	90	if (sd == dev->sd_cx25840)
	91	cx23885_ir_rx_work_handler(&dev->ir_rx_work);
	92	else
	93	schedule_work(&dev->ir_rx_work);
f59ad611 AW	94	}
f59ad611 AW	95
e5514f10	96	/* Possibly called in an IRQ context */
f59ad611 AW	97	void cx23885_ir_tx_v4l2_dev_notify(struct v4l2_subdev *sd, u32 events)
	98	{
	99	struct cx23885_dev *dev = to_cx23885(sd->v4l2_dev);
	100	unsigned long *notifications = &dev->ir_tx_notifications;
	101
	102	if (events & V4L2_SUBDEV_IR_TX_FIFO_SERVICE_REQ)
	103	set_bit(CX23885_IR_TX_FIFO_SERVICE_REQ, notifications);
e5514f10 AW	104
	105	/*
	106	* For the integrated AV core, we are already in a workqueue context.
	107	* For the CX23888 integrated IR, we are in an interrupt context.
	108	*/
	109	if (sd == dev->sd_cx25840)
	110	cx23885_ir_tx_work_handler(&dev->ir_tx_work);
	111	else
	112	schedule_work(&dev->ir_tx_work);
f59ad611	113	}