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Date: Thu, 18 Jan 2018 17:51:10 +0900
From: <Yasunari.Takiguchi@...y.com>
To: <linux-kernel@...r.kernel.org>, <devicetree@...r.kernel.org>,
<linux-media@...r.kernel.org>
CC: <tbird20d@...il.com>, <frowand.list@...il.com>,
<Yasunari.Takiguchi@...y.com>, <Masayuki.Yamamoto@...y.com>,
<Hideki.Nozawa@...y.com>, <Kota.Yonezawa@...y.com>,
<Toshihiko.Matsumoto@...y.com>, <Satoshi.C.Watanabe@...y.com>
Subject: [PATCH v5 06/12] [media] cxd2880: Add integration layer for the driver
From: Yasunari Takiguchi <Yasunari.Takiguchi@...y.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@...y.com>
Signed-off-by: Masayuki Yamamoto <Masayuki.Yamamoto@...y.com>
Signed-off-by: Hideki Nozawa <Hideki.Nozawa@...y.com>
Signed-off-by: Kota Yonezawa <Kota.Yonezawa@...y.com>
Signed-off-by: Toshihiko Matsumoto <Toshihiko.Matsumoto@...y.com>
Signed-off-by: Satoshi Watanabe <Satoshi.C.Watanabe@...y.com>
---
[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
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