[media] rtl2832: add code to bind r820t on it

There are some init stuff to be done for each new tuner at the
demod code. Add the code there for r820t.

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

3 files changed, 88 insertions, 17 deletions

diff --git a/drivers/media/dvb-frontends/rtl2832.c b/drivers/media/dvb-frontends/rtl2832.c
index 73887690b046..b6f50c7a15e6 100644
--- a/drivers/media/dvb-frontends/rtl2832.c
+++ b/drivers/media/dvb-frontends/rtl2832.c
@@ -432,22 +432,12 @@ static int rtl2832_init(struct dvb_frontend *fe)
                 {DVBT_TR_THD_SET2,              0x6},
                 {DVBT_TRK_KC_I2,                0x5},
                 {DVBT_CR_THD_SET2,              0x1},
-                {DVBT_SPEC_INV,                 0x0},
         };
 
         dev_dbg(&priv->i2c->dev, "%s:\n", __func__);
 
         en_bbin = (priv->cfg.if_dvbt == 0 ? 0x1 : 0x0);
 
-        /*
-        * PSET_IFFREQ = - floor((IfFreqHz % CrystalFreqHz) * pow(2, 22)
-        *               / CrystalFreqHz)
-        */
-        pset_iffreq = priv->cfg.if_dvbt % priv->cfg.xtal;
-        pset_iffreq *= 0x400000;
-        pset_iffreq = div_u64(pset_iffreq, priv->cfg.xtal);
-        pset_iffreq = pset_iffreq & 0x3fffff;
-
         for (i = 0; i < ARRAY_SIZE(rtl2832_initial_regs); i++) {
                 ret = rtl2832_wr_demod_reg(priv, rtl2832_initial_regs[i].reg,
                         rtl2832_initial_regs[i].value);
@@ -472,6 +462,10 @@ static int rtl2832_init(struct dvb_frontend *fe)
                 len = ARRAY_SIZE(rtl2832_tuner_init_e4000);
                 init = rtl2832_tuner_init_e4000;
                 break;
+        case RTL2832_TUNER_R820T:
+                len = ARRAY_SIZE(rtl2832_tuner_init_r820t);
+                init = rtl2832_tuner_init_r820t;
+                break;
         default:
                 ret = -EINVAL;
                 goto err;
@@ -483,14 +477,43 @@ static int rtl2832_init(struct dvb_frontend *fe)
                         goto err;
         }
 
-        /* if frequency settings */
-        ret = rtl2832_wr_demod_reg(priv, DVBT_EN_BBIN, en_bbin);
-                if (ret)
-                        goto err;
+        /*
+         * if frequency settings
+         * Some tuners (r820t) don't initialize IF here; instead; they do it
+         * at set_params()
+         */
+        if (!fe->ops.tuner_ops.get_if_frequency) {
+                /*
+                * PSET_IFFREQ = - floor((IfFreqHz % CrystalFreqHz) * pow(2, 22)
+                *               / CrystalFreqHz)
+                */
+                pset_iffreq = priv->cfg.if_dvbt % priv->cfg.xtal;
+                pset_iffreq *= 0x400000;
+                pset_iffreq = div_u64(pset_iffreq, priv->cfg.xtal);
+                pset_iffreq = pset_iffreq & 0x3fffff;
+                ret = rtl2832_wr_demod_reg(priv, DVBT_EN_BBIN, en_bbin);
+                        if (ret)
+                                goto err;
+
+                ret = rtl2832_wr_demod_reg(priv, DVBT_PSET_IFFREQ, pset_iffreq);
+                        if (ret)
+                                goto err;
+        }
 
-        ret = rtl2832_wr_demod_reg(priv, DVBT_PSET_IFFREQ, pset_iffreq);
-                if (ret)
-                        goto err;
+        /*
+         * r820t NIM code does a software reset here at the demod -
+         * may not be needed, as there's already a software reset at set_params()
+         */
+#if 1
+        /* soft reset */
+        ret = rtl2832_wr_demod_reg(priv, DVBT_SOFT_RST, 0x1);
+        if (ret)
+                goto err;
+
+        ret = rtl2832_wr_demod_reg(priv, DVBT_SOFT_RST, 0x0);
+        if (ret)
+                goto err;
+#endif
 
         priv->sleeping = false;
 
@@ -564,6 +587,25 @@ static int rtl2832_set_frontend(struct dvb_frontend *fe)
         if (fe->ops.tuner_ops.set_params)
                 fe->ops.tuner_ops.set_params(fe);
 
+        /* If the frontend has get_if_frequency(), use it */
+        if (fe->ops.tuner_ops.get_if_frequency) {
+                u32 if_freq;
+                u64 pset_iffreq;
+
+                ret = fe->ops.tuner_ops.get_if_frequency(fe, &if_freq);
+                if (ret)
+                        goto err;
+
+                pset_iffreq = if_freq % priv->cfg.xtal;
+                pset_iffreq *= 0x400000;
+                pset_iffreq = div_u64(pset_iffreq, priv->cfg.xtal);
+                pset_iffreq = pset_iffreq & 0x3fffff;
+
+                ret = rtl2832_wr_demod_reg(priv, DVBT_PSET_IFFREQ, pset_iffreq);
+                if (ret)
+                        goto err;
+        }
+
         switch (c->bandwidth_hz) {
         case 6000000:
                 i = 0;
diff --git a/drivers/media/dvb-frontends/rtl2832.h b/drivers/media/dvb-frontends/rtl2832.h
index fefba0e9ba30..91b2dcf5a6ea 100644
--- a/drivers/media/dvb-frontends/rtl2832.h
+++ b/drivers/media/dvb-frontends/rtl2832.h
@@ -52,6 +52,7 @@ struct rtl2832_config {
 #define RTL2832_TUNER_FC0012    0x26
 #define RTL2832_TUNER_E4000     0x27
 #define RTL2832_TUNER_FC0013    0x29
+#define RTL2832_TUNER_R820T     0x2a
         u8 tuner;
 };
 
diff --git a/drivers/media/dvb-frontends/rtl2832_priv.h b/drivers/media/dvb-frontends/rtl2832_priv.h
index 7d97ce9d2193..b5f2b80092ee 100644
--- a/drivers/media/dvb-frontends/rtl2832_priv.h
+++ b/drivers/media/dvb-frontends/rtl2832_priv.h
@@ -267,6 +267,7 @@ static const struct rtl2832_reg_value rtl2832_tuner_init_tua9001[] = {
         {DVBT_OPT_ADC_IQ,                0x1},
         {DVBT_AD_AVI,                    0x0},
         {DVBT_AD_AVQ,                    0x0},
+        {DVBT_SPEC_INV,                  0x0},
 };
 
 static const struct rtl2832_reg_value rtl2832_tuner_init_fc0012[] = {
@@ -300,6 +301,7 @@ static const struct rtl2832_reg_value rtl2832_tuner_init_fc0012[] = {
         {DVBT_GI_PGA_STATE,              0x0},
         {DVBT_EN_AGC_PGA,                0x1},
         {DVBT_IF_AGC_MAN,                0x0},
+        {DVBT_SPEC_INV,                  0x0},
 };
 
 static const struct rtl2832_reg_value rtl2832_tuner_init_e4000[] = {
@@ -337,6 +339,32 @@ static const struct rtl2832_reg_value rtl2832_tuner_init_e4000[] = {
         {DVBT_REG_MONSEL,                0x1},
         {DVBT_REG_MON,                   0x1},
         {DVBT_REG_4MSEL,                 0x0},
+        {DVBT_SPEC_INV,                  0x0},
+};
+
+static const struct rtl2832_reg_value rtl2832_tuner_init_r820t[] = {
+        {DVBT_DAGC_TRG_VAL,             0x39},
+        {DVBT_AGC_TARG_VAL_0,           0x0},
+        {DVBT_AGC_TARG_VAL_8_1,         0x40},
+        {DVBT_AAGC_LOOP_GAIN,           0x16},
+        {DVBT_LOOP_GAIN2_3_0,           0x8},
+        {DVBT_LOOP_GAIN2_4,             0x1},
+        {DVBT_LOOP_GAIN3,               0x18},
+        {DVBT_VTOP1,                    0x35},
+        {DVBT_VTOP2,                    0x21},
+        {DVBT_VTOP3,                    0x21},
+        {DVBT_KRF1,                     0x0},
+        {DVBT_KRF2,                     0x40},
+        {DVBT_KRF3,                     0x10},
+        {DVBT_KRF4,                     0x10},
+        {DVBT_IF_AGC_MIN,               0x80},
+        {DVBT_IF_AGC_MAX,               0x7f},
+        {DVBT_RF_AGC_MIN,               0x80},
+        {DVBT_RF_AGC_MAX,               0x7f},
+        {DVBT_POLAR_RF_AGC,             0x0},
+        {DVBT_POLAR_IF_AGC,             0x0},
+        {DVBT_AD7_SETTING,              0xe9f4},
+        {DVBT_SPEC_INV,                 0x1},
 };
 
 #endif /* RTL2832_PRIV_H */