[media] rtl2830: implement PID filter

Implement PID filter.

Signed-off-by: Antti Palosaari <crope@iki.fi>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>

3 files changed, 70 insertions, 0 deletions

diff --git a/drivers/media/dvb-frontends/rtl2830.c b/drivers/media/dvb-frontends/rtl2830.c
index f1f1cfb6cb16..8abaca66e132 100644
--- a/drivers/media/dvb-frontends/rtl2830.c
+++ b/drivers/media/dvb-frontends/rtl2830.c
@@ -723,6 +723,71 @@ err:
         dev_dbg(&client->dev, "failed=%d\n", ret);
 }
 
+static int rtl2830_pid_filter_ctrl(struct dvb_frontend *fe, int onoff)
+{
+        struct i2c_client *client = fe->demodulator_priv;
+        int ret;
+        u8 u8tmp;
+
+        dev_dbg(&client->dev, "onoff=%d\n", onoff);
+
+        /* enable / disable PID filter */
+        if (onoff)
+                u8tmp = 0x80;
+        else
+                u8tmp = 0x00;
+
+        ret = rtl2830_wr_reg_mask(client, 0x061, u8tmp, 0x80);
+        if (ret)
+                goto err;
+
+        return 0;
+err:
+        dev_dbg(&client->dev, "failed=%d\n", ret);
+        return ret;
+}
+
+static int rtl2830_pid_filter(struct dvb_frontend *fe, u8 index, u16 pid, int onoff)
+{
+        struct i2c_client *client = fe->demodulator_priv;
+        struct rtl2830_dev *dev = i2c_get_clientdata(client);
+        int ret;
+        u8 buf[4];
+
+        dev_dbg(&client->dev, "index=%d pid=%04x onoff=%d\n",
+                index, pid, onoff);
+
+        /* skip invalid PIDs (0x2000) */
+        if (pid > 0x1fff || index > 32)
+                return 0;
+
+        if (onoff)
+                set_bit(index, &dev->filters);
+        else
+                clear_bit(index, &dev->filters);
+
+        /* enable / disable PIDs */
+        buf[0] = (dev->filters >>  0) & 0xff;
+        buf[1] = (dev->filters >>  8) & 0xff;
+        buf[2] = (dev->filters >> 16) & 0xff;
+        buf[3] = (dev->filters >> 24) & 0xff;
+        ret = rtl2830_wr_regs(client, 0x062, buf, 4);
+        if (ret)
+                goto err;
+
+        /* add PID */
+        buf[0] = (pid >> 8) & 0xff;
+        buf[1] = (pid >> 0) & 0xff;
+        ret = rtl2830_wr_regs(client, 0x066 + 2 * index, buf, 2);
+        if (ret)
+                goto err;
+
+        return 0;
+err:
+        dev_dbg(&client->dev, "failed=%d\n", ret);
+        return ret;
+}
+
 /*
  * I2C gate/repeater logic
  * We must use unlocked i2c_transfer() here because I2C lock is already taken
@@ -843,6 +908,8 @@ static int rtl2830_probe(struct i2c_client *client,
         /* setup callbacks */
         pdata->get_dvb_frontend = rtl2830_get_dvb_frontend;
         pdata->get_i2c_adapter = rtl2830_get_i2c_adapter;
+        pdata->pid_filter = rtl2830_pid_filter;
+        pdata->pid_filter_ctrl = rtl2830_pid_filter_ctrl;
 
         dev_info(&client->dev, "Realtek RTL2830 successfully attached\n");
 
diff --git a/drivers/media/dvb-frontends/rtl2830.h b/drivers/media/dvb-frontends/rtl2830.h
index 61f784c935be..156edf714f9f 100644
--- a/drivers/media/dvb-frontends/rtl2830.h
+++ b/drivers/media/dvb-frontends/rtl2830.h
@@ -49,6 +49,8 @@ struct rtl2830_platform_data {
          */
         struct dvb_frontend* (*get_dvb_frontend)(struct i2c_client *);
         struct i2c_adapter* (*get_i2c_adapter)(struct i2c_client *);
+        int (*pid_filter)(struct dvb_frontend *, u8, u16, int);
+        int (*pid_filter_ctrl)(struct dvb_frontend *, int);
 };
 
 #endif /* RTL2830_H */
diff --git a/drivers/media/dvb-frontends/rtl2830_priv.h b/drivers/media/dvb-frontends/rtl2830_priv.h
index 6a0e982584f3..293188924f51 100644
--- a/drivers/media/dvb-frontends/rtl2830_priv.h
+++ b/drivers/media/dvb-frontends/rtl2830_priv.h
@@ -31,6 +31,7 @@ struct rtl2830_dev {
         struct dvb_frontend fe;
         bool sleeping;
         u8 page; /* active register page */
+        unsigned long filters;
         struct delayed_work stat_work;
         fe_status_t fe_status;
         u64 post_bit_error_prev; /* for old DVBv3 read_ber() calculation */