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>

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;

drivers/media/dvb/ttpci/budget-ci.c

@@ -1076,6 +1076,10 @@ static struct tda10023_config tda10023_config = {
 	.deltaf = 0xa511,
 };
 
+static struct tda827x_config tda827x_config = {
+	.config = 0,
+};
+
 /* TT S2-3200 DVB-S (STB0899) Inittab */
 static const struct stb0899_s1_reg tt3200_stb0899_s1_init_1[] = {
 
@@ -1414,7 +1418,7 @@ static void frontend_init(struct budget_ci *budget_ci)
 	case 0x101a: /* TT Budget-C-1501 (philips tda10023/philips tda8274A) */
 		budget_ci->budget.dvb_frontend = dvb_attach(tda10023_attach, &tda10023_config, &budget_ci->budget.i2c_adap, 0x48);
 		if (budget_ci->budget.dvb_frontend) {
-			if (dvb_attach(tda827x_attach, budget_ci->budget.dvb_frontend, 0x61, &budget_ci->budget.i2c_adap, NULL) == NULL) {
+			if (dvb_attach(tda827x_attach, budget_ci->budget.dvb_frontend, 0x61, &budget_ci->budget.i2c_adap, &tda827x_config) == NULL) {
 				printk(KERN_ERR "%s: No tda827x found!\n", __func__);
 				dvb_frontend_detach(budget_ci->budget.dvb_frontend);
 				budget_ci->budget.dvb_frontend = NULL;