From c7861bb048669540ff51e2e1bf84d60f165007ad Mon Sep 17 00:00:00 2001 From: Antti Palosaari Date: Tue, 12 May 2015 14:26:07 -0300 Subject: [PATCH] [media] e4000: implement V4L2 subdevice tuner and core ops Implement V4L2 subdevice tuner and core ops. After that this driver is hybrid driver implementing both V4L2 and DVB ops. Signed-off-by: Antti Palosaari Signed-off-by: Mauro Carvalho Chehab --- drivers/media/tuners/e4000.c | 216 +++++++++++++++++++++++++----- drivers/media/tuners/e4000_priv.h | 2 + 2 files changed, 182 insertions(+), 36 deletions(-) diff --git a/drivers/media/tuners/e4000.c b/drivers/media/tuners/e4000.c index 57bdca44a5bd..3b49a4550bd3 100644 --- a/drivers/media/tuners/e4000.c +++ b/drivers/media/tuners/e4000.c @@ -20,9 +20,8 @@ #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; int ret; @@ -89,9 +88,8 @@ err: 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; int ret; @@ -109,19 +107,18 @@ err: 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 dtv_frontend_properties *c = &fe->dtv_property_cache; int ret, i; unsigned int div_n, k, k_cw, div_out; u64 f_vco; u8 buf[5], i_data[4], q_data[4]; - dev_dbg(&client->dev, - "delivery_system=%d frequency=%u bandwidth_hz=%u\n", - c->delivery_system, c->frequency, c->bandwidth_hz); + if (!dev->active) { + dev_dbg(&client->dev, "tuner is sleeping\n"); + return 0; + } /* gain control manual */ 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++) { - if (c->frequency <= e4000_pll_lut[i].freq) + if (dev->f_frequency <= e4000_pll_lut[i].freq) break; } 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 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 */ div_n = div_u64_rem(f_vco, F_REF, &k); k_cw = div_u64((u64) k * 0x10000, F_REF); dev_dbg(&client->dev, - "frequency=%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); + "frequency=%u bandwidth=%u f_vco=%llu F_REF=%u div_n=%u k=%u k_cw=%04x div_out=%u\n", + dev->f_frequency, dev->f_bandwidth, f_vco, F_REF, div_n, k, + k_cw, div_out); buf[0] = div_n; buf[1] = (k_cw >> 0) & 0xff; @@ -174,7 +172,7 @@ static int e4000_set_params(struct dvb_frontend *fe) /* LNA filter (RF filter) */ 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; } if (i == ARRAY_SIZE(e400_lna_filter_lut)) { @@ -188,7 +186,7 @@ static int e4000_set_params(struct dvb_frontend *fe) /* IF filters */ 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; } if (i == ARRAY_SIZE(e4000_if_filter_lut)) { @@ -205,7 +203,7 @@ static int e4000_set_params(struct dvb_frontend *fe) /* frequency band */ 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; } if (i == ARRAY_SIZE(e4000_band_lut)) { @@ -269,19 +267,133 @@ err: 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[] = { + { + .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) { - struct e4000_dev *dev = fe->tuner_priv; + 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; + 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; } -#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) { 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 i2c_client *client = dev->client; - struct dtv_frontend_properties *c = &dev->fe->dtv_property_cache; int ret; if (!dev->active) @@ -443,8 +554,13 @@ static int e4000_s_ctrl(struct v4l2_ctrl *ctrl) switch (ctrl->id) { case V4L2_CID_RF_TUNER_BANDWIDTH_AUTO: 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; case V4L2_CID_RF_TUNER_LNA_GAIN_AUTO: case V4L2_CID_RF_TUNER_LNA_GAIN: @@ -473,24 +589,49 @@ static const struct v4l2_ctrl_ops e4000_ctrl_ops = { }; #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 = { .name = "Elonics E4000", .frequency_min = 174000000, .frequency_max = 862000000, }, - .init = e4000_init, - .sleep = e4000_sleep, - .set_params = e4000_set_params, + .init = e4000_dvb_init, + .sleep = e4000_dvb_sleep, + .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, 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->f_frequency = bands[0].rangelow; + dev->f_bandwidth = dev->bandwidth->val; + v4l2_i2c_subdev_init(&dev->sd, client, &e4000_subdev_ops); #endif fe->tuner_priv = dev; - memcpy(&fe->ops.tuner_ops, &e4000_tuner_ops, - sizeof(struct dvb_tuner_ops)); + memcpy(&fe->ops.tuner_ops, &e4000_dvb_tuner_ops, + sizeof(fe->ops.tuner_ops)); v4l2_set_subdevdata(&dev->sd, client); i2c_set_clientdata(client, &dev->sd); diff --git a/drivers/media/tuners/e4000_priv.h b/drivers/media/tuners/e4000_priv.h index 8e991df9509e..d6d5d11bbfe0 100644 --- a/drivers/media/tuners/e4000_priv.h +++ b/drivers/media/tuners/e4000_priv.h @@ -34,6 +34,8 @@ struct e4000_dev { struct dvb_frontend *fe; struct v4l2_subdev sd; bool active; + unsigned int f_frequency; + unsigned int f_bandwidth; /* Controls */ struct v4l2_ctrl_handler hdl; -- 2.20.1