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From:   <Yasunari.Takiguchi@sony.com>
To:     <linux-kernel@vger.kernel.org>, <devicetree@vger.kernel.org>,
        <linux-media@vger.kernel.org>
CC:     <tbird20d@gmail.com>, <frowand.list@gmail.com>,
        Yasunari Takiguchi <Yasunari.Takiguchi@sony.com>,
        Masayuki Yamamoto <Masayuki.Yamamoto@sony.com>,
        Hideki Nozawa <Hideki.Nozawa@sony.com>,
        "Kota Yonezawa" <Kota.Yonezawa@sony.com>,
        Toshihiko Matsumoto <Toshihiko.Matsumoto@sony.com>,
        Satoshi Watanabe <Satoshi.C.Watanabe@sony.com>
Subject: [PATCH v4 06/12] [media] cxd2880: Add integration layer for the driver
Date:   Fri, 13 Oct 2017 15:08:34 +0900
Message-ID: <20171013060834.21526-1-Yasunari.Takiguchi@sony.com>
In-Reply-To: <20171013054635.20946-1-Yasunari.Takiguchi@sony.com>
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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 <Masayuki.Yamamoto@sony.com>
Signed-off-by: Hideki Nozawa <Hideki.Nozawa@sony.com>
Signed-off-by: Kota Yonezawa <Kota.Yonezawa@sony.com>
Signed-off-by: Toshihiko Matsumoto <Toshihiko.Matsumoto@sony.com>
Signed-off-by: Satoshi Watanabe <Satoshi.C.Watanabe@sony.com>
---

[Change list]
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    | 98 ++++++++++++++++++++++
 .../media/dvb-frontends/cxd2880/cxd2880_integ.h    | 44 ++++++++++
 2 files changed, 142 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..7264fc355d6b
--- /dev/null
+++ b/drivers/media/dvb-frontends/cxd2880/cxd2880_integ.c
@@ -0,0 +1,98 @@
+/*
+ * cxd2880_integ.c
+ * Sony CXD2880 DVB-T2/T tuner + demodulator driver
+ * integration layer common functions
+ *
+ * Copyright (C) 2016, 2017 Sony Semiconductor Solutions Corporation
+ *
+ * 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; version 2 of the License.
+ *
+ * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
+ * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+ * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "cxd2880_tnrdmd.h"
+#include "cxd2880_tnrdmd_mon.h"
+#include "cxd2880_integ.h"
+
+int cxd2880_integ_init(struct cxd2880_tnrdmd *tnr_dmd)
+{
+	int ret;
+	struct cxd2880_stopwatch timer;
+	unsigned int elapsed_time = 0;
+	u8 cpu_task_completed = 0;
+
+	if (!tnr_dmd)
+		return -EINVAL;
+
+	ret = cxd2880_tnrdmd_init1(tnr_dmd);
+	if (ret)
+		return ret;
+
+	ret = cxd2880_stopwatch_start(&timer);
+	if (ret)
+		return ret;
+
+	while (1) {
+		ret = cxd2880_stopwatch_elapsed(&timer, &elapsed_time);
+		if (ret)
+			return ret;
+
+		ret =
+		    cxd2880_tnrdmd_check_internal_cpu_status(tnr_dmd,
+						     &cpu_task_completed);
+		if (ret)
+			return ret;
+
+		if (cpu_task_completed)
+			break;
+
+		if (elapsed_time > CXD2880_TNRDMD_WAIT_INIT_TIMEOUT)
+			return -ETIME;
+		ret =
+		    cxd2880_stopwatch_sleep(&timer,
+					    CXD2880_TNRDMD_WAIT_INIT_INTVL);
+		if (ret)
+			return ret;
+	}
+
+	ret = cxd2880_tnrdmd_init2(tnr_dmd);
+	if (ret)
+		return ret;
+
+	return 0;
+}
+
+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..2b4fe5c3743b
--- /dev/null
+++ b/drivers/media/dvb-frontends/cxd2880/cxd2880_integ.h
@@ -0,0 +1,44 @@
+/*
+ * cxd2880_integ.h
+ * Sony CXD2880 DVB-T2/T tuner + demodulator driver
+ * integration layer common interface
+ *
+ * Copyright (C) 2016, 2017 Sony Semiconductor Solutions Corporation
+ *
+ * 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; version 2 of the License.
+ *
+ * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
+ * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+ * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, see <http://www.gnu.org/licenses/>.
+ */
+
+#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
-- 
2.13.0


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