[media] e4000: implement V4L2 subdevice tuner and core ops (c7861bb0) · Commits · e / devices / android_kernel_fairphone_FP4

drivers/media/tuners/e4000.c

+180 −36

Original line number	Original line	Diff line number	Diff line
	@@ -20,9 +20,8 @@

	#include "e4000_priv.h"		#include "e4000_priv.h"

	static int e4000_init(struct dvb_frontend *fe)		static int e4000_init(struct e4000_dev *dev)
	{		{
	struct e4000_dev *dev = fe->tuner_priv;
	struct i2c_client *client = dev->client;		struct i2c_client *client = dev->client;
	int ret;		int ret;

	@@ -89,9 +88,8 @@ static int e4000_init(struct dvb_frontend *fe)
	return ret;		return ret;
	}		}

	static int e4000_sleep(struct dvb_frontend *fe)		static int e4000_sleep(struct e4000_dev *dev)
	{		{
	struct e4000_dev *dev = fe->tuner_priv;
	struct i2c_client *client = dev->client;		struct i2c_client *client = dev->client;
	int ret;		int ret;

	@@ -109,19 +107,18 @@ static int e4000_sleep(struct dvb_frontend *fe)
	return ret;		return ret;
	}		}

	static int e4000_set_params(struct dvb_frontend *fe)		static int e4000_set_params(struct e4000_dev *dev)
	{		{
	struct e4000_dev *dev = fe->tuner_priv;
	struct i2c_client *client = dev->client;		struct i2c_client *client = dev->client;
	struct dtv_frontend_properties *c = &fe->dtv_property_cache;
	int ret, i;		int ret, i;
	unsigned int div_n, k, k_cw, div_out;		unsigned int div_n, k, k_cw, div_out;
	u64 f_vco;		u64 f_vco;
	u8 buf[5], i_data[4], q_data[4];		u8 buf[5], i_data[4], q_data[4];

	dev_dbg(&client->dev,		if (!dev->active) {
	"delivery_system=%d frequency=%u bandwidth_hz=%u\n",		dev_dbg(&client->dev, "tuner is sleeping\n");
	c->delivery_system, c->frequency, c->bandwidth_hz);		return 0;
			}

	/* gain control manual */		/* gain control manual */
	ret = regmap_write(dev->regmap, 0x1a, 0x00);		ret = regmap_write(dev->regmap, 0x1a, 0x00);
	@@ -144,7 +141,7 @@ static int e4000_set_params(struct dvb_frontend *fe)
	* +-------+		* +-------+
	*/		*/
	for (i = 0; i < ARRAY_SIZE(e4000_pll_lut); i++) {		for (i = 0; i < ARRAY_SIZE(e4000_pll_lut); i++) {
	if (c->frequency <= e4000_pll_lut[i].freq)		if (dev->f_frequency <= e4000_pll_lut[i].freq)
	break;		break;
	}		}
	if (i == ARRAY_SIZE(e4000_pll_lut)) {		if (i == ARRAY_SIZE(e4000_pll_lut)) {
	@@ -154,14 +151,15 @@ static int e4000_set_params(struct dvb_frontend *fe)

	#define F_REF dev->clk		#define F_REF dev->clk
	div_out = e4000_pll_lut[i].div_out;		div_out = e4000_pll_lut[i].div_out;
	f_vco = (u64) c->frequency * div_out;		f_vco = (u64) dev->f_frequency * div_out;
	/* calculate PLL integer and fractional control word */		/* calculate PLL integer and fractional control word */
	div_n = div_u64_rem(f_vco, F_REF, &k);		div_n = div_u64_rem(f_vco, F_REF, &k);
	k_cw = div_u64((u64) k * 0x10000, F_REF);		k_cw = div_u64((u64) k * 0x10000, F_REF);

	dev_dbg(&client->dev,		dev_dbg(&client->dev,
	"frequency=%u f_vco=%llu F_REF=%u div_n=%u k=%u k_cw=%04x div_out=%u\n",		"frequency=%u bandwidth=%u f_vco=%llu F_REF=%u div_n=%u k=%u k_cw=%04x div_out=%u\n",
	c->frequency, f_vco, F_REF, div_n, k, k_cw, div_out);		dev->f_frequency, dev->f_bandwidth, f_vco, F_REF, div_n, k,
			k_cw, div_out);

	buf[0] = div_n;		buf[0] = div_n;
	buf[1] = (k_cw >> 0) & 0xff;		buf[1] = (k_cw >> 0) & 0xff;
	@@ -174,7 +172,7 @@ static int e4000_set_params(struct dvb_frontend *fe)

	/* LNA filter (RF filter) */		/* LNA filter (RF filter) */
	for (i = 0; i < ARRAY_SIZE(e400_lna_filter_lut); i++) {		for (i = 0; i < ARRAY_SIZE(e400_lna_filter_lut); i++) {
	if (c->frequency <= e400_lna_filter_lut[i].freq)		if (dev->f_frequency <= e400_lna_filter_lut[i].freq)
	break;		break;
	}		}
	if (i == ARRAY_SIZE(e400_lna_filter_lut)) {		if (i == ARRAY_SIZE(e400_lna_filter_lut)) {
	@@ -188,7 +186,7 @@ static int e4000_set_params(struct dvb_frontend *fe)

	/* IF filters */		/* IF filters */
	for (i = 0; i < ARRAY_SIZE(e4000_if_filter_lut); i++) {		for (i = 0; i < ARRAY_SIZE(e4000_if_filter_lut); i++) {
	if (c->bandwidth_hz <= e4000_if_filter_lut[i].freq)		if (dev->f_bandwidth <= e4000_if_filter_lut[i].freq)
	break;		break;
	}		}
	if (i == ARRAY_SIZE(e4000_if_filter_lut)) {		if (i == ARRAY_SIZE(e4000_if_filter_lut)) {
	@@ -205,7 +203,7 @@ static int e4000_set_params(struct dvb_frontend *fe)

	/* frequency band */		/* frequency band */
	for (i = 0; i < ARRAY_SIZE(e4000_band_lut); i++) {		for (i = 0; i < ARRAY_SIZE(e4000_band_lut); i++) {
	if (c->frequency <= e4000_band_lut[i].freq)		if (dev->f_frequency <= e4000_band_lut[i].freq)
	break;		break;
	}		}
	if (i == ARRAY_SIZE(e4000_band_lut)) {		if (i == ARRAY_SIZE(e4000_band_lut)) {
	@@ -269,19 +267,133 @@ static int e4000_set_params(struct dvb_frontend *fe)
	return ret;		return ret;
	}		}

	static int e4000_get_if_frequency(struct dvb_frontend fe, u32 frequency)		/*
			* V4L2 API
			*/
			#if IS_ENABLED(CONFIG_VIDEO_V4L2)
			static const struct v4l2_frequency_band bands[] = {
	{		{
	struct e4000_dev *dev = fe->tuner_priv;		.type = V4L2_TUNER_RF,
			.index = 0,
			.capability = V4L2_TUNER_CAP_1HZ \| V4L2_TUNER_CAP_FREQ_BANDS,
			.rangelow = 59000000,
			.rangehigh = 1105000000,
			},
			{
			.type = V4L2_TUNER_RF,
			.index = 1,
			.capability = V4L2_TUNER_CAP_1HZ \| V4L2_TUNER_CAP_FREQ_BANDS,
			.rangelow = 1249000000,
			.rangehigh = 2208000000,
			},
			};

			static inline struct e4000_dev e4000_subdev_to_dev(struct v4l2_subdev sd)
			{
			return container_of(sd, struct e4000_dev, sd);
			}

			static int e4000_s_power(struct v4l2_subdev *sd, int on)
			{
			struct e4000_dev *dev = e4000_subdev_to_dev(sd);
	struct i2c_client *client = dev->client;		struct i2c_client *client = dev->client;
			int ret;

	dev_dbg(&client->dev, "\n");		dev_dbg(&client->dev, "on=%d\n", on);

	frequency = 0; / Zero-IF */		if (on)
			ret = e4000_init(dev);
			else
			ret = e4000_sleep(dev);
			if (ret)
			return ret;

			return e4000_set_params(dev);
			}

			static const struct v4l2_subdev_core_ops e4000_subdev_core_ops = {
			.s_power = e4000_s_power,
			};

			static int e4000_g_tuner(struct v4l2_subdev sd, struct v4l2_tuner v)
			{
			struct e4000_dev *dev = e4000_subdev_to_dev(sd);
			struct i2c_client *client = dev->client;

			dev_dbg(&client->dev, "index=%d\n", v->index);

			strlcpy(v->name, "Elonics E4000", sizeof(v->name));
			v->type = V4L2_TUNER_RF;
			v->capability = V4L2_TUNER_CAP_1HZ \| V4L2_TUNER_CAP_FREQ_BANDS;
			v->rangelow = bands[0].rangelow;
			v->rangehigh = bands[1].rangehigh;
	return 0;		return 0;
	}		}

	#if IS_ENABLED(CONFIG_VIDEO_V4L2)		static int e4000_s_tuner(struct v4l2_subdev sd, const struct v4l2_tuner v)
			{
			struct e4000_dev *dev = e4000_subdev_to_dev(sd);
			struct i2c_client *client = dev->client;

			dev_dbg(&client->dev, "index=%d\n", v->index);
			return 0;
			}

			static int e4000_g_frequency(struct v4l2_subdev sd, struct v4l2_frequency f)
			{
			struct e4000_dev *dev = e4000_subdev_to_dev(sd);
			struct i2c_client *client = dev->client;

			dev_dbg(&client->dev, "tuner=%d\n", f->tuner);
			f->frequency = dev->f_frequency;
			return 0;
			}

			static int e4000_s_frequency(struct v4l2_subdev *sd,
			const struct v4l2_frequency *f)
			{
			struct e4000_dev *dev = e4000_subdev_to_dev(sd);
			struct i2c_client *client = dev->client;

			dev_dbg(&client->dev, "tuner=%d type=%d frequency=%u\n",
			f->tuner, f->type, f->frequency);

			dev->f_frequency = clamp_t(unsigned int, f->frequency,
			bands[0].rangelow, bands[1].rangehigh);
			return e4000_set_params(dev);
			}

			static int e4000_enum_freq_bands(struct v4l2_subdev *sd,
			struct v4l2_frequency_band *band)
			{
			struct e4000_dev *dev = e4000_subdev_to_dev(sd);
			struct i2c_client *client = dev->client;

			dev_dbg(&client->dev, "tuner=%d type=%d index=%d\n",
			band->tuner, band->type, band->index);

			if (band->index >= ARRAY_SIZE(bands))
			return -EINVAL;

			band->capability = bands[band->index].capability;
			band->rangelow = bands[band->index].rangelow;
			band->rangehigh = bands[band->index].rangehigh;
			return 0;
			}

			static const struct v4l2_subdev_tuner_ops e4000_subdev_tuner_ops = {
			.g_tuner = e4000_g_tuner,
			.s_tuner = e4000_s_tuner,
			.g_frequency = e4000_g_frequency,
			.s_frequency = e4000_s_frequency,
			.enum_freq_bands = e4000_enum_freq_bands,
			};

			static const struct v4l2_subdev_ops e4000_subdev_ops = {
			.core = &e4000_subdev_core_ops,
			.tuner = &e4000_subdev_tuner_ops,
			};

	static int e4000_set_lna_gain(struct dvb_frontend *fe)		static int e4000_set_lna_gain(struct dvb_frontend *fe)
	{		{
	struct e4000_dev *dev = fe->tuner_priv;		struct e4000_dev *dev = fe->tuner_priv;
	@@ -434,7 +546,6 @@ static int e4000_s_ctrl(struct v4l2_ctrl *ctrl)
	{		{
	struct e4000_dev *dev = container_of(ctrl->handler, struct e4000_dev, hdl);		struct e4000_dev *dev = container_of(ctrl->handler, struct e4000_dev, hdl);
	struct i2c_client *client = dev->client;		struct i2c_client *client = dev->client;
	struct dtv_frontend_properties *c = &dev->fe->dtv_property_cache;
	int ret;		int ret;

	if (!dev->active)		if (!dev->active)
	@@ -443,8 +554,13 @@ static int e4000_s_ctrl(struct v4l2_ctrl *ctrl)
	switch (ctrl->id) {		switch (ctrl->id) {
	case V4L2_CID_RF_TUNER_BANDWIDTH_AUTO:		case V4L2_CID_RF_TUNER_BANDWIDTH_AUTO:
	case V4L2_CID_RF_TUNER_BANDWIDTH:		case V4L2_CID_RF_TUNER_BANDWIDTH:
	c->bandwidth_hz = dev->bandwidth->val;		/*
	ret = e4000_set_params(dev->fe);		* TODO: Auto logic does not work 100% correctly as tuner driver
			* do not have information to calculate maximum suitable
			* bandwidth. Calculating it is responsible of master driver.
			*/
			dev->f_bandwidth = dev->bandwidth->val;
			ret = e4000_set_params(dev);
	break;		break;
	case V4L2_CID_RF_TUNER_LNA_GAIN_AUTO:		case V4L2_CID_RF_TUNER_LNA_GAIN_AUTO:
	case V4L2_CID_RF_TUNER_LNA_GAIN:		case V4L2_CID_RF_TUNER_LNA_GAIN:
	@@ -473,24 +589,49 @@ static const struct v4l2_ctrl_ops e4000_ctrl_ops = {
	};		};
	#endif		#endif

	static const struct dvb_tuner_ops e4000_tuner_ops = {		/*
			* DVB API
			*/
			static int e4000_dvb_set_params(struct dvb_frontend *fe)
			{
			struct e4000_dev *dev = fe->tuner_priv;
			struct dtv_frontend_properties *c = &fe->dtv_property_cache;

			dev->f_frequency = c->frequency;
			dev->f_bandwidth = c->bandwidth_hz;
			return e4000_set_params(dev);
			}

			static int e4000_dvb_init(struct dvb_frontend *fe)
			{
			return e4000_init(fe->tuner_priv);
			}

			static int e4000_dvb_sleep(struct dvb_frontend *fe)
			{
			return e4000_sleep(fe->tuner_priv);
			}

			static int e4000_dvb_get_if_frequency(struct dvb_frontend fe, u32 frequency)
			{
			frequency = 0; / Zero-IF */
			return 0;
			}

			static const struct dvb_tuner_ops e4000_dvb_tuner_ops = {
	.info = {		.info = {
	.name = "Elonics E4000",		.name = "Elonics E4000",
	.frequency_min = 174000000,		.frequency_min = 174000000,
	.frequency_max = 862000000,		.frequency_max = 862000000,
	},		},

	.init = e4000_init,		.init = e4000_dvb_init,
	.sleep = e4000_sleep,		.sleep = e4000_dvb_sleep,
	.set_params = e4000_set_params,		.set_params = e4000_dvb_set_params,

	.get_if_frequency = e4000_get_if_frequency,		.get_if_frequency = e4000_dvb_get_if_frequency,
	};		};

	/*
	* Use V4L2 subdev to carry V4L2 control handler, even we don't implement
	* subdev itself, just to avoid reinventing the wheel.
	*/
	static int e4000_probe(struct i2c_client *client,		static int e4000_probe(struct i2c_client *client,
	const struct i2c_device_id *id)		const struct i2c_device_id *id)
	{		{
	@@ -569,10 +710,13 @@ static int e4000_probe(struct i2c_client *client,
	}		}

	dev->sd.ctrl_handler = &dev->hdl;		dev->sd.ctrl_handler = &dev->hdl;
			dev->f_frequency = bands[0].rangelow;
			dev->f_bandwidth = dev->bandwidth->val;
			v4l2_i2c_subdev_init(&dev->sd, client, &e4000_subdev_ops);
	#endif		#endif
	fe->tuner_priv = dev;		fe->tuner_priv = dev;
	memcpy(&fe->ops.tuner_ops, &e4000_tuner_ops,		memcpy(&fe->ops.tuner_ops, &e4000_dvb_tuner_ops,
	sizeof(struct dvb_tuner_ops));		sizeof(fe->ops.tuner_ops));
	v4l2_set_subdevdata(&dev->sd, client);		v4l2_set_subdevdata(&dev->sd, client);
	i2c_set_clientdata(client, &dev->sd);		i2c_set_clientdata(client, &dev->sd);

drivers/media/tuners/e4000_priv.h

+2 −0

Original line number	Original line	Diff line number	Diff line
	@@ -34,6 +34,8 @@ struct e4000_dev {
	struct dvb_frontend *fe;		struct dvb_frontend *fe;
	struct v4l2_subdev sd;		struct v4l2_subdev sd;
	bool active;		bool active;
			unsigned int f_frequency;
			unsigned int f_bandwidth;

	/* Controls */		/* Controls */
	struct v4l2_ctrl_handler hdl;		struct v4l2_ctrl_handler hdl;