[PATCH 1/1] media: dvb_dummy_tuner: implement driver skeleton

Daniel W. S. Almeida
2020-01-09T15:24:28Z

From: "Daniel W. S. Almeida" <dwlsalmeida@gmail.com>

Implement the skeleton for the tuner driver in a separate file.

Signed-off-by: Daniel W. S. Almeida <dwlsalmeida@gmail.com>
---
drivers/media/tuners/Kconfig | 7 ++
drivers/media/tuners/Makefile | 1 +
drivers/media/tuners/dvb_dummy_tuner.c | 153 +++++++++++++++++++++++++
drivers/media/tuners/dvb_dummy_tuner.h | 20 ++++
4 files changed, 181 insertions(+)
create mode 100644 drivers/media/tuners/dvb_dummy_tuner.c
create mode 100644 drivers/media/tuners/dvb_dummy_tuner.h

diff --git a/drivers/media/tuners/Kconfig b/drivers/media/tuners/Kconfig
index e104bb7766e1..efa1591fe0ae 100644
--- a/drivers/media/tuners/Kconfig
+++ b/drivers/media/tuners/Kconfig
@@ -296,4 +296,11 @@ config MEDIA_TUNER_QM1D1B0004
default m if !MEDIA_SUBDRV_AUTOSELECT
help
Sharp QM1D1B0004 ISDB-S tuner driver.
+
+config MEDIA_TUNER_DVB_DUMMY_TUNER
+ tristate "Dummy tuner"
+ depends on MEDIA_SUPPORT && I2C
+ default m if !MEDIA_SUBDRV_AUTOSELECT
+ help
+ Dummy tuner driver for common TV standards.
endmenu
diff --git a/drivers/media/tuners/Makefile b/drivers/media/tuners/Makefile
index 7b4f8423501e..f98de1cf2e19 100644
--- a/drivers/media/tuners/Makefile
+++ b/drivers/media/tuners/Makefile
@@ -44,5 +44,6 @@ obj-$(CONFIG_MEDIA_TUNER_QM1D1C0042) += qm1d1c0042.o
obj-$(CONFIG_MEDIA_TUNER_QM1D1B0004) += qm1d1b0004.o
obj-$(CONFIG_MEDIA_TUNER_M88RS6000T) += m88rs6000t.o
obj-$(CONFIG_MEDIA_TUNER_TDA18250) += tda18250.o
+obj-$(CONFIG_MEDIA_TUNER_DVB_DUMMY_TUNER) += dvb_dummy_tuner.o

ccflags-y += -I$(srctree)/drivers/media/dvb-frontends
diff --git a/drivers/media/tuners/dvb_dummy_tuner.c b/drivers/media/tuners/dvb_dummy_tuner.c
new file mode 100644
index 000000000000..63d2e47d4739
--- /dev/null
+++ b/drivers/media/tuners/dvb_dummy_tuner.c
@@ -0,0 +1,153 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Driver for Dummy Frontend
+ *
+ * Written by Daniel W. S. Almeida <dwlsalmeida@gmail.com>
+ */
+
+#include <linux/errno.h>
+#include <linux/i2c.h>
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/types.h>
+#include <media/dvb_frontend.h>
+#include "dvb_dummy_tuner.h"
+
+struct dvb_dummy_tuner_dev {
+ struct dvb_frontend *fe;
+};
+
+static void dvb_dummy_tuner_release(struct dvb_frontend *fe)
+{
+}
+
+static int dvb_dummy_tuner_init(struct dvb_frontend *fe)
+{
+ return 0;
+}
+
+static int dvb_dummy_tuner_sleep(struct dvb_frontend *fe)
+{
+ return 0;
+}
+
+static int dvb_dummy_tuner_suspend(struct dvb_frontend *fe)
+{
+ return 0;
+}
+
+static int dvb_dummy_tuner_resume(struct dvb_frontend *fe)
+{
+ return 0;
+}
+
+static int dvb_dummy_tuner_set_params(struct dvb_frontend *fe)
+{
+ return 0;
+}
+
+static int dvb_dummy_tuner_set_config(struct dvb_frontend *fe, void *priv_cfg)
+{
+ return 0;
+}
+
+static int dvb_dummy_tuner_get_frequency(struct dvb_frontend *fe,
+ u32 *frequency)
+{
+ return 0;
+}
+
+static int dvb_dummy_tuner_get_bandwidth(struct dvb_frontend *fe,
+ u32 *bandwidth)
+{
+ return 0;
+}
+
+static int dvb_dummy_tuner_get_if_frequency(struct dvb_frontend *fe,
+ u32 *frequency)
+{
+ return 0;
+}
+
+static int dvb_dummy_tuner_get_status(struct dvb_frontend *fe, u32 *status)
+{
+ return 0;
+}
+
+static const struct dvb_tuner_ops dvb_dummy_tuner_ops = {
+ .release = dvb_dummy_tuner_release,
+ .init = dvb_dummy_tuner_init,
+ .sleep = dvb_dummy_tuner_sleep,
+ .suspend = dvb_dummy_tuner_suspend,
+ .resume = dvb_dummy_tuner_resume,
+ .set_params = dvb_dummy_tuner_set_params,
+ .set_config = dvb_dummy_tuner_set_config,
+ .get_bandwidth = dvb_dummy_tuner_get_bandwidth,
+ .get_frequency = dvb_dummy_tuner_get_frequency,
+ .get_if_frequency = dvb_dummy_tuner_get_if_frequency,
+ .get_status = dvb_dummy_tuner_get_status,
+};
+
+static const struct i2c_device_id dvb_dummy_tuner_i2c_id_table[] = {
+ {"dvb_dummy_tuner", 0},
+ {}
+};
+MODULE_DEVICE_TABLE(i2c, dvb_dummy_tuner_i2c_id_table);
+
+static int dvb_dummy_tuner_i2c_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ int ret = 0;
+ struct dvb_dummy_tuner_config *config = client->dev.platform_data;
+ struct dvb_frontend *fe = config->fe;
+ struct dvb_dummy_tuner_dev *tuner_dev = NULL;
+
+ tuner_dev = kzalloc(sizeof(*tuner_dev), GFP_KERNEL);
+ if (!tuner_dev) {
+ ret = -ENOMEM;
+ goto err;
+ }
+
+ i2c_set_clientdata(client, tuner_dev);
+ tuner_dev->fe = config->fe;
+
+ memcpy(&fe->ops.tuner_ops,
+ &dvb_dummy_tuner_ops,
+ sizeof(struct dvb_tuner_ops));
+
+ fe->tuner_priv = client;
+
+ pr_debug("%s: Successfully probed %s\n", __func__, client->name);
+ return ret;
+
+err:
+ pr_err("%s: failed\n", __func__);
+ return ret;
+}
+
+static int dvb_dummy_tuner_i2c_remove(struct i2c_client *client)
+{
+ struct dvb_dummy_tuner_dev *tuner_dev = i2c_get_clientdata(client);
+ struct dvb_frontend *fe = tuner_dev->fe;
+
+ memset(&fe->ops.tuner_ops, 0, sizeof(struct dvb_tuner_ops));
+ fe->tuner_priv = NULL;
+ kfree(tuner_dev);
+
+ return 0;
+}
+
+static struct i2c_driver dvb_dummy_tuner_i2c_driver = {
+ .driver = {
+ .name = "dvb_dummy_tuner",
+ .suppress_bind_attrs = true,
+ },
+ .probe = dvb_dummy_tuner_i2c_probe,
+ .remove = dvb_dummy_tuner_i2c_remove,
+ .id_table = dvb_dummy_tuner_i2c_id_table,
+};
+module_i2c_driver(dvb_dummy_tuner_i2c_driver);
+
+MODULE_DESCRIPTION("DVB Dummy Tuner");
+MODULE_AUTHOR("Daniel W. S. Almeida");
+MODULE_LICENSE("GPL");
diff --git a/drivers/media/tuners/dvb_dummy_tuner.h b/drivers/media/tuners/dvb_dummy_tuner.h
new file mode 100644
index 000000000000..fde7628258fa
--- /dev/null
+++ b/drivers/media/tuners/dvb_dummy_tuner.h
@@ -0,0 +1,20 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * DVB Dummy Tuner
+ *
+ */
+#ifndef __TUNER_DVB_DUMMY_TUNER_H__
+#define __TUNER_DVB_DUMMY_TUNER_H__
+
+#include <media/dvb_frontend.h>
+/**
+ * struct dvb_dummy_tuner_config - configuration parameters for the dummy tuner
+ *
+ * @fe:
+ * frontend returned by driver
+ */
+struct dvb_dummy_tuner_config {
+ struct dvb_frontend *fe;
+};
+
+#endif /*__TUNER_DVB_DUMMY_TUNER_H__ */
--
2.24.1