[media] e4000: implement controls via v4l2 control framework

Implement gain and bandwidth controls using v4l2 control framework.

Cc: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Antti Palosaari <crope@iki.fi>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>

3 files changed, 291 insertions, 5 deletions

diff --git a/drivers/media/tuners/Kconfig b/drivers/media/tuners/Kconfig
index ba2e365296cf..3b95392c75e6 100644
--- a/drivers/media/tuners/Kconfig
+++ b/drivers/media/tuners/Kconfig
@@ -203,7 +203,7 @@ config MEDIA_TUNER_TDA18212
 
 config MEDIA_TUNER_E4000
         tristate "Elonics E4000 silicon tuner"
-        depends on MEDIA_SUPPORT && I2C
+        depends on MEDIA_SUPPORT && I2C && VIDEO_V4L2
         default m if !MEDIA_SUBDRV_AUTOSELECT
         help
           Elonics E4000 silicon tuner driver.
diff --git a/drivers/media/tuners/e4000.c b/drivers/media/tuners/e4000.c
index 015316985245..3a03b026eb0c 100644
--- a/drivers/media/tuners/e4000.c
+++ b/drivers/media/tuners/e4000.c
@@ -385,6 +385,178 @@ static int e4000_get_if_frequency(struct dvb_frontend *fe, u32 *frequency)
         return 0;
 }
 
+static int e4000_set_lna_gain(struct dvb_frontend *fe)
+{
+        struct e4000_priv *priv = fe->tuner_priv;
+        int ret;
+        u8 u8tmp;
+        dev_dbg(&priv->client->dev, "%s: lna auto=%d->%d val=%d->%d\n",
+                        __func__, priv->lna_gain_auto->cur.val,
+                        priv->lna_gain_auto->val, priv->lna_gain->cur.val,
+                        priv->lna_gain->val);
+
+        if (fe->ops.i2c_gate_ctrl)
+                fe->ops.i2c_gate_ctrl(fe, 1);
+
+        if (priv->lna_gain_auto->val && priv->if_gain_auto->cur.val)
+                u8tmp = 0x17;
+        else if (priv->lna_gain_auto->val)
+                u8tmp = 0x19;
+        else if (priv->if_gain_auto->cur.val)
+                u8tmp = 0x16;
+        else
+                u8tmp = 0x10;
+
+        ret = e4000_wr_reg(priv, 0x1a, u8tmp);
+        if (ret)
+                goto err;
+
+        if (priv->lna_gain_auto->val == false) {
+                ret = e4000_wr_reg(priv, 0x14, priv->lna_gain->val);
+                if (ret)
+                        goto err;
+        }
+
+        if (fe->ops.i2c_gate_ctrl)
+                fe->ops.i2c_gate_ctrl(fe, 0);
+
+        return 0;
+err:
+        if (fe->ops.i2c_gate_ctrl)
+                fe->ops.i2c_gate_ctrl(fe, 0);
+
+        dev_dbg(&priv->client->dev, "%s: failed=%d\n", __func__, ret);
+        return ret;
+}
+
+static int e4000_set_mixer_gain(struct dvb_frontend *fe)
+{
+        struct e4000_priv *priv = fe->tuner_priv;
+        int ret;
+        u8 u8tmp;
+        dev_dbg(&priv->client->dev, "%s: mixer auto=%d->%d val=%d->%d\n",
+                        __func__, priv->mixer_gain_auto->cur.val,
+                        priv->mixer_gain_auto->val, priv->mixer_gain->cur.val,
+                        priv->mixer_gain->val);
+
+        if (fe->ops.i2c_gate_ctrl)
+                fe->ops.i2c_gate_ctrl(fe, 1);
+
+        if (priv->mixer_gain_auto->val)
+                u8tmp = 0x15;
+        else
+                u8tmp = 0x14;
+
+        ret = e4000_wr_reg(priv, 0x20, u8tmp);
+        if (ret)
+                goto err;
+
+        if (priv->mixer_gain_auto->val == false) {
+                ret = e4000_wr_reg(priv, 0x15, priv->mixer_gain->val);
+                if (ret)
+                        goto err;
+        }
+
+        if (fe->ops.i2c_gate_ctrl)
+                fe->ops.i2c_gate_ctrl(fe, 0);
+
+        return 0;
+err:
+        if (fe->ops.i2c_gate_ctrl)
+                fe->ops.i2c_gate_ctrl(fe, 0);
+
+        dev_dbg(&priv->client->dev, "%s: failed=%d\n", __func__, ret);
+        return ret;
+}
+
+static int e4000_set_if_gain(struct dvb_frontend *fe)
+{
+        struct e4000_priv *priv = fe->tuner_priv;
+        int ret;
+        u8 buf[2];
+        u8 u8tmp;
+        dev_dbg(&priv->client->dev, "%s: if auto=%d->%d val=%d->%d\n",
+                        __func__, priv->if_gain_auto->cur.val,
+                        priv->if_gain_auto->val, priv->if_gain->cur.val,
+                        priv->if_gain->val);
+
+        if (fe->ops.i2c_gate_ctrl)
+                fe->ops.i2c_gate_ctrl(fe, 1);
+
+        if (priv->if_gain_auto->val && priv->lna_gain_auto->cur.val)
+                u8tmp = 0x17;
+        else if (priv->lna_gain_auto->cur.val)
+                u8tmp = 0x19;
+        else if (priv->if_gain_auto->val)
+                u8tmp = 0x16;
+        else
+                u8tmp = 0x10;
+
+        ret = e4000_wr_reg(priv, 0x1a, u8tmp);
+        if (ret)
+                goto err;
+
+        if (priv->if_gain_auto->val == false) {
+                buf[0] = e4000_if_gain_lut[priv->if_gain->val].reg16_val;
+                buf[1] = e4000_if_gain_lut[priv->if_gain->val].reg17_val;
+                ret = e4000_wr_regs(priv, 0x16, buf, 2);
+                if (ret)
+                        goto err;
+        }
+
+        if (fe->ops.i2c_gate_ctrl)
+                fe->ops.i2c_gate_ctrl(fe, 0);
+
+        return 0;
+err:
+        if (fe->ops.i2c_gate_ctrl)
+                fe->ops.i2c_gate_ctrl(fe, 0);
+
+        dev_dbg(&priv->client->dev, "%s: failed=%d\n", __func__, ret);
+        return ret;
+}
+
+static int e4000_s_ctrl(struct v4l2_ctrl *ctrl)
+{
+        struct e4000_priv *priv =
+                        container_of(ctrl->handler, struct e4000_priv, hdl);
+        struct dvb_frontend *fe = priv->fe;
+        struct dtv_frontend_properties *c = &fe->dtv_property_cache;
+        int ret;
+        dev_dbg(&priv->client->dev,
+                        "%s: id=%d name=%s val=%d min=%d max=%d step=%d\n",
+                        __func__, ctrl->id, ctrl->name, ctrl->val,
+                        ctrl->minimum, ctrl->maximum, ctrl->step);
+
+        switch (ctrl->id) {
+        case V4L2_CID_RF_TUNER_BANDWIDTH_AUTO:
+        case V4L2_CID_RF_TUNER_BANDWIDTH:
+                c->bandwidth_hz = priv->bandwidth->val;
+                ret = e4000_set_params(priv->fe);
+                break;
+        case  V4L2_CID_RF_TUNER_LNA_GAIN_AUTO:
+        case  V4L2_CID_RF_TUNER_LNA_GAIN:
+                ret = e4000_set_lna_gain(priv->fe);
+                break;
+        case  V4L2_CID_RF_TUNER_MIXER_GAIN_AUTO:
+        case  V4L2_CID_RF_TUNER_MIXER_GAIN:
+                ret = e4000_set_mixer_gain(priv->fe);
+                break;
+        case  V4L2_CID_RF_TUNER_IF_GAIN_AUTO:
+        case  V4L2_CID_RF_TUNER_IF_GAIN:
+                ret = e4000_set_if_gain(priv->fe);
+                break;
+        default:
+                ret = -EINVAL;
+        }
+
+        return ret;
+}
+
+static const struct v4l2_ctrl_ops e4000_ctrl_ops = {
+        .s_ctrl = e4000_s_ctrl,
+};
+
 static const struct dvb_tuner_ops e4000_tuner_ops = {
         .info = {
                 .name           = "Elonics E4000",
@@ -399,6 +571,10 @@ static const struct dvb_tuner_ops e4000_tuner_ops = {
         .get_if_frequency = e4000_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)
 {
@@ -440,6 +616,37 @@ static int e4000_probe(struct i2c_client *client,
         if (ret < 0)
                 goto err;
 
+        /* Register controls */
+        v4l2_ctrl_handler_init(&priv->hdl, 8);
+        priv->bandwidth_auto = v4l2_ctrl_new_std(&priv->hdl, &e4000_ctrl_ops,
+                        V4L2_CID_RF_TUNER_BANDWIDTH_AUTO, 0, 1, 1, 1);
+        priv->bandwidth = v4l2_ctrl_new_std(&priv->hdl, &e4000_ctrl_ops,
+                        V4L2_CID_RF_TUNER_BANDWIDTH, 4300000, 11000000, 100000, 4300000);
+        v4l2_ctrl_auto_cluster(2, &priv->bandwidth_auto, 0, false);
+        priv->lna_gain_auto = v4l2_ctrl_new_std(&priv->hdl, &e4000_ctrl_ops,
+                        V4L2_CID_RF_TUNER_LNA_GAIN_AUTO, 0, 1, 1, 1);
+        priv->lna_gain = v4l2_ctrl_new_std(&priv->hdl, &e4000_ctrl_ops,
+                        V4L2_CID_RF_TUNER_LNA_GAIN, 0, 15, 1, 10);
+        v4l2_ctrl_auto_cluster(2, &priv->lna_gain_auto, 0, false);
+        priv->mixer_gain_auto = v4l2_ctrl_new_std(&priv->hdl, &e4000_ctrl_ops,
+                        V4L2_CID_RF_TUNER_MIXER_GAIN_AUTO, 0, 1, 1, 1);
+        priv->mixer_gain = v4l2_ctrl_new_std(&priv->hdl, &e4000_ctrl_ops,
+                        V4L2_CID_RF_TUNER_MIXER_GAIN, 0, 1, 1, 1);
+        v4l2_ctrl_auto_cluster(2, &priv->mixer_gain_auto, 0, false);
+        priv->if_gain_auto = v4l2_ctrl_new_std(&priv->hdl, &e4000_ctrl_ops,
+                        V4L2_CID_RF_TUNER_IF_GAIN_AUTO, 0, 1, 1, 1);
+        priv->if_gain = v4l2_ctrl_new_std(&priv->hdl, &e4000_ctrl_ops,
+                        V4L2_CID_RF_TUNER_IF_GAIN, 0, 54, 1, 0);
+        v4l2_ctrl_auto_cluster(2, &priv->if_gain_auto, 0, false);
+        if (priv->hdl.error) {
+                ret = priv->hdl.error;
+                dev_err(&priv->client->dev, "Could not initialize controls\n");
+                v4l2_ctrl_handler_free(&priv->hdl);
+                goto err;
+        }
+
+        priv->sd.ctrl_handler = &priv->hdl;
+
         dev_info(&priv->client->dev,
                         "%s: Elonics E4000 successfully identified\n",
                         KBUILD_MODNAME);
@@ -448,11 +655,12 @@ static int e4000_probe(struct i2c_client *client,
         memcpy(&fe->ops.tuner_ops, &e4000_tuner_ops,
                         sizeof(struct dvb_tuner_ops));
 
+        v4l2_set_subdevdata(&priv->sd, client);
+        i2c_set_clientdata(client, &priv->sd);
+
         if (fe->ops.i2c_gate_ctrl)
                 fe->ops.i2c_gate_ctrl(fe, 0);
 
-        i2c_set_clientdata(client, priv);
-
         return 0;
 err:
         if (fe->ops.i2c_gate_ctrl)
@@ -465,11 +673,12 @@ err:
 
 static int e4000_remove(struct i2c_client *client)
 {
-        struct e4000_priv *priv = i2c_get_clientdata(client);
+        struct v4l2_subdev *sd = i2c_get_clientdata(client);
+        struct e4000_priv *priv = container_of(sd, struct e4000_priv, sd);
         struct dvb_frontend *fe = priv->fe;
 
         dev_dbg(&client->dev, "%s:\n", __func__);
-
+        v4l2_ctrl_handler_free(&priv->hdl);
         memset(&fe->ops.tuner_ops, 0, sizeof(struct dvb_tuner_ops));
         fe->tuner_priv = NULL;
         kfree(priv);
diff --git a/drivers/media/tuners/e4000_priv.h b/drivers/media/tuners/e4000_priv.h
index 8f45a300f688..e2ad54f52280 100644
--- a/drivers/media/tuners/e4000_priv.h
+++ b/drivers/media/tuners/e4000_priv.h
@@ -22,11 +22,25 @@
 #define E4000_PRIV_H
 
 #include "e4000.h"
+#include <media/v4l2-ctrls.h>
+#include <media/v4l2-subdev.h>
 
 struct e4000_priv {
         struct i2c_client *client;
         u32 clock;
         struct dvb_frontend *fe;
+        struct v4l2_subdev sd;
+
+        /* Controls */
+        struct v4l2_ctrl_handler hdl;
+        struct v4l2_ctrl *bandwidth_auto;
+        struct v4l2_ctrl *bandwidth;
+        struct v4l2_ctrl *lna_gain_auto;
+        struct v4l2_ctrl *lna_gain;
+        struct v4l2_ctrl *mixer_gain_auto;
+        struct v4l2_ctrl *mixer_gain;
+        struct v4l2_ctrl *if_gain_auto;
+        struct v4l2_ctrl *if_gain;
 };
 
 struct e4000_pll {
@@ -145,4 +159,67 @@ static const struct e4000_if_filter e4000_if_filter_lut[] = {
         { 0xffffffff, 0x00, 0x20 },
 };
 
+struct e4000_if_gain {
+        u8 reg16_val;
+        u8 reg17_val;
+};
+
+static const struct e4000_if_gain e4000_if_gain_lut[] = {
+        {0x00, 0x00},
+        {0x20, 0x00},
+        {0x40, 0x00},
+        {0x02, 0x00},
+        {0x22, 0x00},
+        {0x42, 0x00},
+        {0x04, 0x00},
+        {0x24, 0x00},
+        {0x44, 0x00},
+        {0x01, 0x00},
+        {0x21, 0x00},
+        {0x41, 0x00},
+        {0x03, 0x00},
+        {0x23, 0x00},
+        {0x43, 0x00},
+        {0x05, 0x00},
+        {0x25, 0x00},
+        {0x45, 0x00},
+        {0x07, 0x00},
+        {0x27, 0x00},
+        {0x47, 0x00},
+        {0x0f, 0x00},
+        {0x2f, 0x00},
+        {0x4f, 0x00},
+        {0x17, 0x00},
+        {0x37, 0x00},
+        {0x57, 0x00},
+        {0x1f, 0x00},
+        {0x3f, 0x00},
+        {0x5f, 0x00},
+        {0x1f, 0x01},
+        {0x3f, 0x01},
+        {0x5f, 0x01},
+        {0x1f, 0x02},
+        {0x3f, 0x02},
+        {0x5f, 0x02},
+        {0x1f, 0x03},
+        {0x3f, 0x03},
+        {0x5f, 0x03},
+        {0x1f, 0x04},
+        {0x3f, 0x04},
+        {0x5f, 0x04},
+        {0x1f, 0x0c},
+        {0x3f, 0x0c},
+        {0x5f, 0x0c},
+        {0x1f, 0x14},
+        {0x3f, 0x14},
+        {0x5f, 0x14},
+        {0x1f, 0x1c},
+        {0x3f, 0x1c},
+        {0x5f, 0x1c},
+        {0x1f, 0x24},
+        {0x3f, 0x24},
+        {0x5f, 0x24},
+        {0x7f, 0x24},
+};
+
 #endif