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: 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>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

diff --git a/drivers/media/dvb-frontends/cxd2880/cxd2880_integ.c b/drivers/media/dvb-frontends/cxd2880/cxd2880_integ.c
new file mode 100644 (file)
index 0000000..5302ab0
--- /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 (file)
index 0000000..7160225
--- /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