Commit aff18712 authored by Yasunari Takiguchi's avatar Yasunari Takiguchi Committed by Mauro Carvalho Chehab
Browse files

media: cxd2880: Add integration layer for the driver 



These functions monitor the driver and watch for task completion.
This is part of the Sony CXD2880 DVB-T2/T tuner + demodulator driver.

Signed-off-by: default avatarYasunari Takiguchi <Yasunari.Takiguchi@sony.com>
Signed-off-by: default avatarMasayuki Yamamoto <Masayuki.Yamamoto@sony.com>
Signed-off-by: default avatarHideki Nozawa <Hideki.Nozawa@sony.com>
Signed-off-by: default avatarKota Yonezawa <Kota.Yonezawa@sony.com>
Signed-off-by: default avatarToshihiko Matsumoto <Toshihiko.Matsumoto@sony.com>
Signed-off-by: default avatarSatoshi Watanabe <Satoshi.C.Watanabe@sony.com>
Signed-off-by: default avatarMauro Carvalho Chehab <mchehab@s-opensource.com>
parent e5835488

drivers/media/dvb-frontends/cxd2880/cxd2880_integ.c

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// SPDX-License-Identifier: GPL-2.0

/*

 * cxd2880_integ.c

 * Sony CXD2880 DVB-T2/T tuner + demodulator driver

 * integration layer common functions

 *

 * Copyright (C) 2016, 2017, 2018 Sony Semiconductor Solutions Corporation

 */



#include <linux/ktime.h>

#include <linux/errno.h>



#include "cxd2880_tnrdmd.h"

#include "cxd2880_tnrdmd_mon.h"

#include "cxd2880_integ.h"



int cxd2880_integ_init(struct cxd2880_tnrdmd *tnr_dmd)

{

	int ret;

	ktime_t start;

	u8 cpu_task_completed = 0;



	if (!tnr_dmd)

		return -EINVAL;



	ret = cxd2880_tnrdmd_init1(tnr_dmd);

	if (ret)

		return ret;



	start = ktime_get();



	while (1) {

		ret =

		    cxd2880_tnrdmd_check_internal_cpu_status(tnr_dmd,

						     &cpu_task_completed);

		if (ret)

			return ret;



		if (cpu_task_completed)

			break;



		if (ktime_to_ms(ktime_sub(ktime_get(), start)) >

					CXD2880_TNRDMD_WAIT_INIT_TIMEOUT)

			return -ETIMEDOUT;



		usleep_range(CXD2880_TNRDMD_WAIT_INIT_INTVL,

			     CXD2880_TNRDMD_WAIT_INIT_INTVL + 1000);

	}



	return cxd2880_tnrdmd_init2(tnr_dmd);

}



int cxd2880_integ_cancel(struct cxd2880_tnrdmd *tnr_dmd)

{

	if (!tnr_dmd)

		return -EINVAL;



	atomic_set(&tnr_dmd->cancel, 1);



	return 0;

}



int cxd2880_integ_check_cancellation(struct cxd2880_tnrdmd *tnr_dmd)

{

	if (!tnr_dmd)

		return -EINVAL;



	if (atomic_read(&tnr_dmd->cancel) != 0)

		return -ECANCELED;



	return 0;

}

drivers/media/dvb-frontends/cxd2880/cxd2880_integ.h

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+27 −0
Original line number Diff line number Diff line 
/* SPDX-License-Identifier: GPL-2.0 */

/*

 * cxd2880_integ.h

 * Sony CXD2880 DVB-T2/T tuner + demodulator driver

 * integration layer common interface

 *

 * Copyright (C) 2016, 2017, 2018 Sony Semiconductor Solutions Corporation

 */



#ifndef CXD2880_INTEG_H

#define CXD2880_INTEG_H



#include "cxd2880_tnrdmd.h"



#define CXD2880_TNRDMD_WAIT_INIT_TIMEOUT	500

#define CXD2880_TNRDMD_WAIT_INIT_INTVL	10



#define CXD2880_TNRDMD_WAIT_AGC_STABLE		100



int cxd2880_integ_init(struct cxd2880_tnrdmd *tnr_dmd);



int cxd2880_integ_cancel(struct cxd2880_tnrdmd *tnr_dmd);



int cxd2880_integ_check_cancellation(struct cxd2880_tnrdmd

				     *tnr_dmd);



#endif