V4L/DVB (11236): tda827x: fix locking issues with DVB-C

Separate tuning table for DVB-C solves tuning problem at 388MHz

TechnoTrend C-1501 DVB-C card does not lock on 388MHz. I assume that
existing frequency table is valid for DVB-T.

This is suggested by the name of the table: tda827xa_dvbt.

Added a table for DVB-C with the name tda827xa_dvbc.

Added runtime selection of the DVB-C table when the tuner is type
FE_QAM.

This should leave the behaviour of this driver with with DVB_T tuners
unchanged. This modification is in file tda827x.c

The tda827x.c gives the following warning message when debug=1:

tda827x: tda827x_config not defined, cannot set LNA gain!

Solved this by adding a tda827x_config struct in budget-ci.c.

Signed-off-by: Klaas de Waal <klaas.de.waal@gmail.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

1 files changed, 45 insertions, 9 deletions

diff --git a/drivers/media/common/tuners/tda827x.c b/drivers/media/common/tuners/tda827x.c
index 8cd55a83b381..36a7bc7585ab 100644
--- a/drivers/media/common/tuners/tda827x.c
+++ b/drivers/media/common/tuners/tda827x.c
@@ -351,7 +351,7 @@ struct tda827xa_data {
         u8  gc3;
 };
 
-static const struct tda827xa_data tda827xa_dvbt[] = {
+static struct tda827xa_data tda827xa_dvbt[] = {
         { .lomax =  56875000, .svco = 3, .spd = 4, .scr = 0, .sbs = 0, .gc3 = 1},
         { .lomax =  67250000, .svco = 0, .spd = 3, .scr = 0, .sbs = 0, .gc3 = 1},
         { .lomax =  81250000, .svco = 1, .spd = 3, .scr = 0, .sbs = 0, .gc3 = 1},
@@ -381,6 +381,36 @@ static const struct tda827xa_data tda827xa_dvbt[] = {
         { .lomax =         0, .svco = 0, .spd = 0, .scr = 0, .sbs = 0, .gc3 = 0}
 };
 
+static struct tda827xa_data tda827xa_dvbc[] = {
+        { .lomax =  50125000, .svco = 2, .spd = 4, .scr = 2, .sbs = 0, .gc3 = 3},
+        { .lomax =  58500000, .svco = 3, .spd = 4, .scr = 2, .sbs = 0, .gc3 = 3},
+        { .lomax =  69250000, .svco = 0, .spd = 3, .scr = 2, .sbs = 0, .gc3 = 3},
+        { .lomax =  83625000, .svco = 1, .spd = 3, .scr = 2, .sbs = 0, .gc3 = 3},
+        { .lomax =  97500000, .svco = 2, .spd = 3, .scr = 2, .sbs = 0, .gc3 = 3},
+        { .lomax = 100250000, .svco = 2, .spd = 3, .scr = 2, .sbs = 1, .gc3 = 1},
+        { .lomax = 117000000, .svco = 3, .spd = 3, .scr = 2, .sbs = 1, .gc3 = 1},
+        { .lomax = 138500000, .svco = 0, .spd = 2, .scr = 2, .sbs = 1, .gc3 = 1},
+        { .lomax = 167250000, .svco = 1, .spd = 2, .scr = 2, .sbs = 1, .gc3 = 1},
+        { .lomax = 187000000, .svco = 2, .spd = 2, .scr = 2, .sbs = 1, .gc3 = 1},
+        { .lomax = 200500000, .svco = 2, .spd = 2, .scr = 2, .sbs = 2, .gc3 = 1},
+        { .lomax = 234000000, .svco = 3, .spd = 2, .scr = 2, .sbs = 2, .gc3 = 3},
+        { .lomax = 277000000, .svco = 0, .spd = 1, .scr = 2, .sbs = 2, .gc3 = 3},
+        { .lomax = 325000000, .svco = 1, .spd = 1, .scr = 2, .sbs = 2, .gc3 = 1},
+        { .lomax = 334500000, .svco = 1, .spd = 1, .scr = 2, .sbs = 3, .gc3 = 3},
+        { .lomax = 401000000, .svco = 2, .spd = 1, .scr = 2, .sbs = 3, .gc3 = 3},
+        { .lomax = 468000000, .svco = 3, .spd = 1, .scr = 2, .sbs = 3, .gc3 = 1},
+        { .lomax = 535000000, .svco = 0, .spd = 0, .scr = 1, .sbs = 3, .gc3 = 1},
+        { .lomax = 554000000, .svco = 0, .spd = 0, .scr = 2, .sbs = 3, .gc3 = 1},
+        { .lomax = 638000000, .svco = 1, .spd = 0, .scr = 1, .sbs = 4, .gc3 = 1},
+        { .lomax = 669000000, .svco = 1, .spd = 0, .scr = 2, .sbs = 4, .gc3 = 1},
+        { .lomax = 720000000, .svco = 2, .spd = 0, .scr = 1, .sbs = 4, .gc3 = 1},
+        { .lomax = 802000000, .svco = 2, .spd = 0, .scr = 2, .sbs = 4, .gc3 = 1},
+        { .lomax = 835000000, .svco = 3, .spd = 0, .scr = 1, .sbs = 4, .gc3 = 1},
+        { .lomax = 885000000, .svco = 3, .spd = 0, .scr = 1, .sbs = 4, .gc3 = 1},
+        { .lomax = 911000000, .svco = 3, .spd = 0, .scr = 2, .sbs = 4, .gc3 = 1},
+        { .lomax =         0, .svco = 0, .spd = 0, .scr = 0, .sbs = 0, .gc3 = 0}
+};
+
 static struct tda827xa_data tda827xa_analog[] = {
         { .lomax =  56875000, .svco = 3, .spd = 4, .scr = 0, .sbs = 0, .gc3 = 3},
         { .lomax =  67250000, .svco = 0, .spd = 3, .scr = 0, .sbs = 0, .gc3 = 3},
@@ -484,6 +514,7 @@ static int tda827xa_set_params(struct dvb_frontend *fe,
                                struct dvb_frontend_parameters *params)
 {
         struct tda827x_priv *priv = fe->tuner_priv;
+        struct tda827xa_data *frequency_map = tda827xa_dvbt;
         u8 buf[11];
 
         struct i2c_msg msg = { .addr = priv->i2c_addr, .flags = 0,
@@ -510,22 +541,27 @@ static int tda827xa_set_params(struct dvb_frontend *fe,
         }
         tuner_freq = params->frequency + if_freq;
 
+        if (fe->ops.info.type == FE_QAM) {
+                dprintk("%s select tda827xa_dvbc\n", __func__);
+                frequency_map = tda827xa_dvbc;
+        }
+
         i = 0;
-        while (tda827xa_dvbt[i].lomax < tuner_freq) {
-                if(tda827xa_dvbt[i + 1].lomax == 0)
+        while (frequency_map[i].lomax < tuner_freq) {
+                if (frequency_map[i + 1].lomax == 0)
                         break;
                 i++;
         }
 
-        N = ((tuner_freq + 31250) / 62500) << tda827xa_dvbt[i].spd;
+        N = ((tuner_freq + 31250) / 62500) << frequency_map[i].spd;
         buf[0] = 0;            // subaddress
         buf[1] = N >> 8;
         buf[2] = N & 0xff;
         buf[3] = 0;
         buf[4] = 0x16;
-        buf[5] = (tda827xa_dvbt[i].spd << 5) + (tda827xa_dvbt[i].svco << 3) +
-                        tda827xa_dvbt[i].sbs;
-        buf[6] = 0x4b + (tda827xa_dvbt[i].gc3 << 4);
+        buf[5] = (frequency_map[i].spd << 5) + (frequency_map[i].svco << 3) +
+                        frequency_map[i].sbs;
+        buf[6] = 0x4b + (frequency_map[i].gc3 << 4);
         buf[7] = 0x1c;
         buf[8] = 0x06;
         buf[9] = 0x24;
@@ -584,7 +620,7 @@ static int tda827xa_set_params(struct dvb_frontend *fe,
 
         /* correct CP value */
         buf[0] = 0x30;
-        buf[1] = 0x10 + tda827xa_dvbt[i].scr;
+        buf[1] = 0x10 + frequency_map[i].scr;
         rc = tuner_transfer(fe, &msg, 1);
         if (rc < 0)
                 goto err;
@@ -599,7 +635,7 @@ static int tda827xa_set_params(struct dvb_frontend *fe,
         msleep(3);
         /* freeze AGC1 */
         buf[0] = 0x50;
-        buf[1] = 0x4f + (tda827xa_dvbt[i].gc3 << 4);
+        buf[1] = 0x4f + (frequency_map[i].gc3 << 4);
         rc = tuner_transfer(fe, &msg, 1);
         if (rc < 0)
                 goto err;