[PATCH v5 06/12] [media] cxd2880: Add integration layer for the driver
From: <Yasunari.Takiguchi@sony.com>
Date: 2018-01-18 08:47:13
Also in:
linux-media, lkml
Subsystem:
media drivers for cxd2880, media input infrastructure (v4l/dvb), the rest · Maintainers:
Yasunari Takiguchi, Mauro Carvalho Chehab, Linus Torvalds
From: Yasunari Takiguchi <Yasunari.Takiguchi@sony.com>
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: Yasunari Takiguchi <Yasunari.Takiguchi@sony.com>
Signed-off-by: Masayuki Yamamoto <redacted>
Signed-off-by: Hideki Nozawa <redacted>
Signed-off-by: Kota Yonezawa <redacted>
Signed-off-by: Toshihiko Matsumoto <redacted>
Signed-off-by: Satoshi Watanabe <redacted>
---
[Change list]
Changes in V5
Using SPDX-License-Identifier
drivers/media/dvb-frontends/cxd2880/cxd2880_integ.c
-removed unnecessary if()
-changed timer function from stop_watch to ktime
Changes in V4
drivers/media/dvb-frontends/cxd2880/cxd2880_integ.c
-removed unnecessary initialization at variable declaration
Changes in V3
drivers/media/dvb-frontends/cxd2880/cxd2880_integ.c
-changed cxd2880_atomic_read to atomic_read
-changed cxd2880_atomic_set to atomic_set
-modified return code
-modified coding style of if()
drivers/media/dvb-frontends/cxd2880/cxd2880_integ.h
-modified return code
.../media/dvb-frontends/cxd2880/cxd2880_integ.c | 72 ++++++++++++++++++++++
.../media/dvb-frontends/cxd2880/cxd2880_integ.h | 27 ++++++++
2 files changed, 99 insertions(+)
create mode 100644 drivers/media/dvb-frontends/cxd2880/cxd2880_integ.c
create mode 100644 drivers/media/dvb-frontends/cxd2880/cxd2880_integ.h
diff --git a/drivers/media/dvb-frontends/cxd2880/cxd2880_integ.c b/drivers/media/dvb-frontends/cxd2880/cxd2880_integ.c
new file mode 100644
index 000000000000..5302ab0964c1
--- /dev/null
+++ b/drivers/media/dvb-frontends/cxd2880/cxd2880_integ.c@@ -0,0 +1,72 @@ +// 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; +}
diff --git a/drivers/media/dvb-frontends/cxd2880/cxd2880_integ.h b/drivers/media/dvb-frontends/cxd2880/cxd2880_integ.h
new file mode 100644
index 000000000000..7160225db8b9
--- /dev/null
+++ b/drivers/media/dvb-frontends/cxd2880/cxd2880_integ.h@@ -0,0 +1,27 @@ +/* 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
--
2.15.1