V4L/DVB (13975): [STV090x] Added internal structure with shared settings and data.

As the STV0900 features two demodulation paths in one chip there is
some information used by both instances of the driver when used in
dual mode. This information is now shared in an internal structure
referenced by I2C adapter and address.

Do initialisation of the demodulator only once when used in dual mode.
Moved global mutex demod_lock to internal structure.
Moved dev_ver and mclk to internal structure.
Removed unused tuner_refclk from stv090x_state.

Signed-off-by: Andreas Regel <[e-mail]>
Signed-off-by: Manu Abraham <[e-mail]>
Signed-off-by: Mauro Carvalho Chehab <[e-mail]>

drivers/media/dvb/frontends/stv090x.c

···
 static unsigned int verbose;
 module_param(verbose, int, 0644);
 
-struct mutex demod_lock;
+/* internal params node */
+struct stv090x_dev {
+	/* pointer for internal params, one for each pair of demods */
+	struct stv090x_internal		*internal;
+	struct stv090x_dev		*next_dev;
+};
+
+/* first internal params */
+static struct stv090x_dev *stv090x_first_dev;
+
+/* find chip by i2c adapter and i2c address */
+static struct stv090x_dev *find_dev(struct i2c_adapter *i2c_adap,
+					u8 i2c_addr)
+{
+	struct stv090x_dev *temp_dev = stv090x_first_dev;
+
+	/*
+	 Search of the last stv0900 chip or
+	 find it by i2c adapter and i2c address */
+	while ((temp_dev != NULL) &&
+		((temp_dev->internal->i2c_adap != i2c_adap) ||
+		(temp_dev->internal->i2c_addr != i2c_addr))) {
+
+		temp_dev = temp_dev->next_dev;
+	}
+
+	return temp_dev;
+}
+
+/* deallocating chip */
+static void remove_dev(struct stv090x_internal *internal)
+{
+	struct stv090x_dev *prev_dev = stv090x_first_dev;
+	struct stv090x_dev *del_dev = find_dev(internal->i2c_adap,
+						internal->i2c_addr);
+
+	if (del_dev != NULL) {
+		if (del_dev == stv090x_first_dev) {
+			stv090x_first_dev = del_dev->next_dev;
+		} else {
+			while (prev_dev->next_dev != del_dev)
+				prev_dev = prev_dev->next_dev;
+
+			prev_dev->next_dev = del_dev->next_dev;
+		}
+
+		kfree(del_dev);
+	}
+}
+
+/* allocating new chip */
+static struct stv090x_dev *append_internal(struct stv090x_internal *internal)
+{
+	struct stv090x_dev *new_dev;
+	struct stv090x_dev *temp_dev;
+
+	new_dev = kmalloc(sizeof(struct stv090x_dev), GFP_KERNEL);
+	if (new_dev != NULL) {
+		new_dev->internal = internal;
+		new_dev->next_dev = NULL;
+
+		/* append to list */
+		if (stv090x_first_dev == NULL) {
+			stv090x_first_dev = new_dev;
+		} else {
+			temp_dev = stv090x_first_dev;
+			while (temp_dev->next_dev != NULL)
+				temp_dev = temp_dev->next_dev;
+
+			temp_dev->next_dev = new_dev;
+		}
+	}
+
+	return new_dev;
+}
+
 
 /* DVBS1 and DSS C/N Lookup table */
 static const struct stv090x_tab stv090x_s1cn_tab[] = {
···
 
 	if (srate > 60000000) {
 		sym  = (srate << 4); /* SR * 2^16 / master_clk */
-		sym /= (state->mclk >> 12);
+		sym /= (state->internal->mclk >> 12);
 	} else if (srate > 6000000) {
 		sym  = (srate << 6);
-		sym /= (state->mclk >> 10);
+		sym /= (state->internal->mclk >> 10);
 	} else {
 		sym  = (srate << 9);
-		sym /= (state->mclk >> 7);
+		sym /= (state->internal->mclk >> 7);
 	}
 
 	if (STV090x_WRITE_DEMOD(state, SFRINIT1, (sym >> 8) & 0x7f) < 0) /* MSB */
···
 	srate = 105 * (srate / 100);
 	if (srate > 60000000) {
 		sym  = (srate << 4); /* SR * 2^16 / master_clk */
-		sym /= (state->mclk >> 12);
+		sym /= (state->internal->mclk >> 12);
 	} else if (srate > 6000000) {
 		sym  = (srate << 6);
-		sym /= (state->mclk >> 10);
+		sym /= (state->internal->mclk >> 10);
 	} else {
 		sym  = (srate << 9);
-		sym /= (state->mclk >> 7);
+		sym /= (state->internal->mclk >> 7);
 	}
 
 	if (sym < 0x7fff) {
···
 	srate = 95 * (srate / 100);
 	if (srate > 60000000) {
 		sym  = (srate << 4); /* SR * 2^16 / master_clk */
-		sym /= (state->mclk >> 12);
+		sym /= (state->internal->mclk >> 12);
 	} else if (srate > 6000000) {
 		sym  = (srate << 6);
-		sym /= (state->mclk >> 10);
+		sym /= (state->internal->mclk >> 10);
 	} else {
 		sym  = (srate << 9);
-		sym /= (state->mclk >> 7);
+		sym /= (state->internal->mclk >> 7);
 	}
 
 	if (STV090x_WRITE_DEMOD(state, SFRLOW1, ((sym >> 8) & 0x7f)) < 0) /* MSB */
···
 
 	switch (state->demod) {
 	case STV090x_DEMODULATOR_0:
-		mutex_lock(&demod_lock);
+		mutex_lock(&state->internal->demod_lock);
 		reg = stv090x_read_reg(state, STV090x_STOPCLK2);
 		STV090x_SETFIELD(reg, STOP_CLKVIT1_FIELD, enable);
 		if (stv090x_write_reg(state, STV090x_STOPCLK2, reg) < 0)
 			goto err;
-		mutex_unlock(&demod_lock);
+		mutex_unlock(&state->internal->demod_lock);
 		break;
 
 	case STV090x_DEMODULATOR_1:
-		mutex_lock(&demod_lock);
+		mutex_lock(&state->internal->demod_lock);
 		reg = stv090x_read_reg(state, STV090x_STOPCLK2);
 		STV090x_SETFIELD(reg, STOP_CLKVIT2_FIELD, enable);
 		if (stv090x_write_reg(state, STV090x_STOPCLK2, reg) < 0)
 			goto err;
-		mutex_unlock(&demod_lock);
+		mutex_unlock(&state->internal->demod_lock);
 		break;
 
 	default:
···
 	}
 	return 0;
 err:
-	mutex_unlock(&demod_lock);
+	mutex_unlock(&state->internal->demod_lock);
 	dprintk(FE_ERROR, 1, "I/O error");
 	return -1;
 }
 
 static int stv090x_dvbs_track_crl(struct stv090x_state *state)
 {
-	if (state->dev_ver >= 0x30) {
+	if (state->internal->dev_ver >= 0x30) {
 		/* Set ACLC BCLC optimised value vs SR */
 		if (state->srate >= 15000000) {
 			if (STV090x_WRITE_DEMOD(state, ACLC, 0x2b) < 0)
···
 		if (STV090x_WRITE_DEMOD(state, BCLC, 0x09) < 0)
 			goto err;
 
-		if (state->dev_ver <= 0x20) {
+		if (state->internal->dev_ver <= 0x20) {
 			/* enable S2 carrier loop */
 			if (STV090x_WRITE_DEMOD(state, CAR2CFG, 0x26) < 0)
 				goto err;
···
 		if (stv090x_dvbs_track_crl(state) < 0)
 			goto err;
 
-		if (state->dev_ver <= 0x20) {
+		if (state->internal->dev_ver <= 0x20) {
 			/* enable S2 carrier loop */
 			if (STV090x_WRITE_DEMOD(state, CAR2CFG, 0x26) < 0)
 				goto err;
···
 	if (STV090x_WRITE_DEMOD(state, DMDISTATE, reg) < 0)
 		goto err;
 
-	if (state->dev_ver <= 0x20) {
+	if (state->internal->dev_ver <= 0x20) {
 		if (state->srate <= 5000000) {
 			if (STV090x_WRITE_DEMOD(state, CARCFG, 0x44) < 0)
 				goto err;
···
 			 * CFR max = +1MHz
 			 */
 			freq_abs  = 1000 << 16;
-			freq_abs /= (state->mclk / 1000);
+			freq_abs /= (state->internal->mclk / 1000);
 			freq      = (s16) freq_abs;
 		} else {
 			/* COLD Start
···
 			 */
 			freq_abs  = (state->search_range / 2000) + 600;
 			freq_abs  = freq_abs << 16;
-			freq_abs /= (state->mclk / 1000);
+			freq_abs /= (state->internal->mclk / 1000);
 			freq      = (s16) freq_abs;
 		}
 
···
 	if (STV090x_WRITE_DEMOD(state, CFRINIT0, 0) < 0)
 		goto err;
 
-	if (state->dev_ver >= 0x20) {
+	if (state->internal->dev_ver >= 0x20) {
 		if (STV090x_WRITE_DEMOD(state, EQUALCFG, 0x41) < 0)
 			goto err;
 		if (STV090x_WRITE_DEMOD(state, FFECFG, 0x41) < 0)
···
 	if (STV090x_WRITE_DEMOD(state, RTC, 0x88) < 0)
 		goto err;
 
-	if (state->dev_ver >= 0x20) {
+	if (state->internal->dev_ver >= 0x20) {
 		/*Frequency offset detector setting*/
 		if (state->srate < 2000000) {
-			if (state->dev_ver <= 0x20) {
+			if (state->internal->dev_ver <= 0x20) {
 				/* Cut 2 */
 				if (STV090x_WRITE_DEMOD(state, CARFREQ, 0x39) < 0)
 					goto err;
···
 		steps = 1;
 
 	dir = 1;
-	freq_step = (1000000 * 256) / (state->mclk / 256);
+	freq_step = (1000000 * 256) / (state->internal->mclk / 256);
 	freq_init = 0;
 
 	for (i = 0; i < steps; i++) {
···
 	u32 srate_coarse = 0, agc2 = 0, car_step = 1200, reg;
 	u32 agc2th;
 
-	if (state->dev_ver >= 0x30)
+	if (state->internal->dev_ver >= 0x30)
 		agc2th = 0x2e00;
 	else
 		agc2th = 0x1f00;
···
 	if (STV090x_WRITE_DEMOD(state, AGC2REF, 0x50) < 0)
 		goto err;
 
-	if (state->dev_ver >= 0x30) {
+	if (state->internal->dev_ver >= 0x30) {
 		if (STV090x_WRITE_DEMOD(state, CARFREQ, 0x99) < 0)
 			goto err;
 		if (STV090x_WRITE_DEMOD(state, SFRSTEP, 0x98) < 0)
 			goto err;
 
-	} else if (state->dev_ver >= 0x20) {
+	} else if (state->internal->dev_ver >= 0x20) {
 		if (STV090x_WRITE_DEMOD(state, CARFREQ, 0x6a) < 0)
 			goto err;
 		if (STV090x_WRITE_DEMOD(state, SFRSTEP, 0x95) < 0)
···
 				STV090x_READ_DEMOD(state, AGC2I0);
 		}
 		agc2 /= 10;
-		srate_coarse = stv090x_get_srate(state, state->mclk);
+		srate_coarse = stv090x_get_srate(state, state->internal->mclk);
 		cur_step++;
 		dir *= -1;
 		if ((tmg_cpt >= 5) && (agc2 < agc2th) &&
···
 	if (!tmg_lock)
 		srate_coarse = 0;
 	else
-		srate_coarse = stv090x_get_srate(state, state->mclk);
+		srate_coarse = stv090x_get_srate(state, state->internal->mclk);
 
 	return srate_coarse;
 err:
···
 {
 	u32 srate_coarse, freq_coarse, sym, reg;
 
-	srate_coarse = stv090x_get_srate(state, state->mclk);
+	srate_coarse = stv090x_get_srate(state, state->internal->mclk);
 	freq_coarse  = STV090x_READ_DEMOD(state, CFR2) << 8;
 	freq_coarse |= STV090x_READ_DEMOD(state, CFR1);
 	sym = 13 * (srate_coarse / 10); /* SFRUP = SFR + 30% */
···
 		if (STV090x_WRITE_DEMOD(state, AGC2REF, 0x38) < 0)
 			goto err;
 
-		if (state->dev_ver >= 0x30) {
+		if (state->internal->dev_ver >= 0x30) {
 			if (STV090x_WRITE_DEMOD(state, CARFREQ, 0x79) < 0)
 				goto err;
-		} else if (state->dev_ver >= 0x20) {
+		} else if (state->internal->dev_ver >= 0x20) {
 			if (STV090x_WRITE_DEMOD(state, CARFREQ, 0x49) < 0)
 				goto err;
 		}
···
 		if (srate_coarse > 3000000) {
 			sym  = 13 * (srate_coarse / 10); /* SFRUP = SFR + 30% */
 			sym  = (sym / 1000) * 65536;
-			sym /= (state->mclk / 1000);
+			sym /= (state->internal->mclk / 1000);
 			if (STV090x_WRITE_DEMOD(state, SFRUP1, (sym >> 8) & 0x7f) < 0)
 				goto err;
 			if (STV090x_WRITE_DEMOD(state, SFRUP0, sym & 0xff) < 0)
 				goto err;
 			sym  = 10 * (srate_coarse / 13); /* SFRLOW = SFR - 30% */
 			sym  = (sym / 1000) * 65536;
-			sym /= (state->mclk / 1000);
+			sym /= (state->internal->mclk / 1000);
 			if (STV090x_WRITE_DEMOD(state, SFRLOW1, (sym >> 8) & 0x7f) < 0)
 				goto err;
 			if (STV090x_WRITE_DEMOD(state, SFRLOW0, sym & 0xff) < 0)
 				goto err;
 			sym  = (srate_coarse / 1000) * 65536;
-			sym /= (state->mclk / 1000);
+			sym /= (state->internal->mclk / 1000);
 			if (STV090x_WRITE_DEMOD(state, SFRINIT1, (sym >> 8) & 0xff) < 0)
 				goto err;
 			if (STV090x_WRITE_DEMOD(state, SFRINIT0, sym & 0xff) < 0)
···
 		} else {
 			sym  = 13 * (srate_coarse / 10); /* SFRUP = SFR + 30% */
 			sym  = (sym / 100) * 65536;
-			sym /= (state->mclk / 100);
+			sym /= (state->internal->mclk / 100);
 			if (STV090x_WRITE_DEMOD(state, SFRUP1, (sym >> 8) & 0x7f) < 0)
 				goto err;
 			if (STV090x_WRITE_DEMOD(state, SFRUP0, sym & 0xff) < 0)
 				goto err;
 			sym  = 10 * (srate_coarse / 14); /* SFRLOW = SFR - 30% */
 			sym  = (sym / 100) * 65536;
-			sym /= (state->mclk / 100);
+			sym /= (state->internal->mclk / 100);
 			if (STV090x_WRITE_DEMOD(state, SFRLOW1, (sym >> 8) & 0x7f) < 0)
 				goto err;
 			if (STV090x_WRITE_DEMOD(state, SFRLOW0, sym & 0xff) < 0)
 				goto err;
 			sym  = (srate_coarse / 100) * 65536;
-			sym /= (state->mclk / 100);
+			sym /= (state->internal->mclk / 100);
 			if (STV090x_WRITE_DEMOD(state, SFRINIT1, (sym >> 8) & 0xff) < 0)
 				goto err;
 			if (STV090x_WRITE_DEMOD(state, SFRINIT0, sym & 0xff) < 0)
···
 
 	agc2 = stv090x_get_agc2_min_level(state);
 
-	if (agc2 > STV090x_SEARCH_AGC2_TH(state->dev_ver)) {
+	if (agc2 > STV090x_SEARCH_AGC2_TH(state->internal->dev_ver)) {
 		lock = 0;
 	} else {
 
-		if (state->dev_ver <= 0x20) {
+		if (state->internal->dev_ver <= 0x20) {
 			if (STV090x_WRITE_DEMOD(state, CARCFG, 0xc4) < 0)
 				goto err;
 		} else {
···
 		if (STV090x_WRITE_DEMOD(state, RTCS2, 0x44) < 0)
 			goto err;
 
-		if (state->dev_ver >= 0x20) {
+		if (state->internal->dev_ver >= 0x20) {
 			if (STV090x_WRITE_DEMOD(state, EQUALCFG, 0x41) < 0)
 				goto err;
 			if (STV090x_WRITE_DEMOD(state, FFECFG, 0x41) < 0)
···
 	car_max = state->search_range / 1000;
 	car_max += car_max / 10;
 	car_max  = 65536 * (car_max / 2);
-	car_max /= (state->mclk / 1000);
+	car_max /= (state->internal->mclk / 1000);
 
 	if (car_max > 0x4000)
 		car_max = 0x4000 ; /* maxcarrier should be<= +-1/4 Mclk */
 
 	inc  = srate;
-	inc /= state->mclk / 1000;
+	inc /= state->internal->mclk / 1000;
 	inc *= 256;
 	inc *= 256;
 	inc /= 1000;
···
 
 	car_max += (car_max / 10); /* 10% margin */
 	car_max  = (65536 * car_max / 2);
-	car_max /= state->mclk / 1000;
+	car_max /= state->internal->mclk / 1000;
 
 	if (car_max > 0x4000)
 		car_max = 0x4000;
···
 	car_max  = state->search_range / 1000;
 	car_max += (car_max / 10);
 	car_max  = (65536 * car_max / 2);
-	car_max /= (state->mclk / 1000);
+	car_max /= (state->internal->mclk / 1000);
 	if (car_max > 0x4000)
 		car_max = 0x4000;
 
···
 	case STV090x_SEARCH_DVBS1:
 	case STV090x_SEARCH_DSS:
 		/* accelerate the frequency detector */
-		if (state->dev_ver >= 0x20) {
+		if (state->internal->dev_ver >= 0x20) {
 			if (STV090x_WRITE_DEMOD(state, CARFREQ, 0x3B) < 0)
 				goto err;
 		}
···
 		break;
 
 	case STV090x_SEARCH_DVBS2:
-		if (state->dev_ver >= 0x20) {
+		if (state->internal->dev_ver >= 0x20) {
 			if (STV090x_WRITE_DEMOD(state, CORRELABS, 0x79) < 0)
 				goto err;
 		}
···
 	case STV090x_SEARCH_AUTO:
 	default:
 		/* accelerate the frequency detector */
-		if (state->dev_ver >= 0x20) {
+		if (state->internal->dev_ver >= 0x20) {
 			if (STV090x_WRITE_DEMOD(state, CARFREQ, 0x3b) < 0)
 				goto err;
 			if (STV090x_WRITE_DEMOD(state, CORRELABS, 0x79) < 0)
···
 		/*run the SW search 2 times maximum*/
 		if (lock || no_signal || (trials == 2)) {
 			/*Check if the demod is not losing lock in DVBS2*/
-			if (state->dev_ver >= 0x20) {
+			if (state->internal->dev_ver >= 0x20) {
 				if (STV090x_WRITE_DEMOD(state, CARFREQ, 0x49) < 0)
 					goto err;
 				if (STV090x_WRITE_DEMOD(state, CORRELABS, 0x9e) < 0)
···
 					/*FALSE lock, The demod is loosing lock */
 					lock = 0;
 					if (trials < 2) {
-						if (state->dev_ver >= 0x20) {
+						if (state->internal->dev_ver >= 0x20) {
 							if (STV090x_WRITE_DEMOD(state, CORRELABS, 0x79) < 0)
 								goto err;
 						}
···
 	derot |= STV090x_READ_DEMOD(state, CFR0);
 
 	derot = comp2(derot, 24);
-	int_1 = state->mclk >> 12;
+	int_1 = mclk >> 12;
 	int_2 = derot >> 12;
 
 	/* carrier_frequency = MasterClock * Reg / 2^24 */
-	tmp_1 = state->mclk % 0x1000;
+	tmp_1 = mclk % 0x1000;
 	tmp_2 = derot % 0x1000;
 
 	derot = (int_1 * int_2) +
···
 	if (stv090x_i2c_gate_ctrl(fe, 0) < 0)
 		goto err;
 
-	offst_freq = stv090x_get_car_freq(state, state->mclk) / 1000;
+	offst_freq = stv090x_get_car_freq(state, state->internal->mclk) / 1000;
 	state->frequency += offst_freq;
 
 	if (stv090x_get_viterbi(state) < 0)
···
 	s32 i;
 	struct stv090x_long_frame_crloop *car_loop, *car_loop_qpsk_low, *car_loop_apsk_low;
 
-	if (state->dev_ver == 0x20) {
+	if (state->internal->dev_ver == 0x20) {
 		car_loop		= stv090x_s2_crl_cut20;
 		car_loop_qpsk_low	= stv090x_s2_lowqpsk_crl_cut20;
 		car_loop_apsk_low	= stv090x_s2_apsk_crl_cut20;
···
 		break;
 	}
 
-	if (state->dev_ver >= 0x30) {
+	if (state->internal->dev_ver >= 0x30) {
 		/* Cut 3.0 and up */
 		short_crl = stv090x_s2_short_crl_cut30;
 	} else {
···
 	s32 srate, pilots, aclc, f_1, f_0, i = 0, blind_tune = 0;
 	u32 reg;
 
-	srate  = stv090x_get_srate(state, state->mclk);
+	srate  = stv090x_get_srate(state, state->internal->mclk);
 	srate += stv090x_get_tmgoffst(state, srate);
 
 	switch (state->delsys) {
···
 		if (STV090x_WRITE_DEMOD(state, DEMOD, reg) < 0)
 			goto err;
 
-		if (state->dev_ver >= 0x30) {
+		if (state->internal->dev_ver >= 0x30) {
 			if (stv090x_get_viterbi(state) < 0)
 				goto err;
 
···
 			goto err;
 	}
 
-	if (state->dev_ver >= 0x20) {
+	if (state->internal->dev_ver >= 0x20) {
 		if ((state->search_mode == STV090x_SEARCH_DVBS1)	||
 		    (state->search_mode == STV090x_SEARCH_DSS)		||
 		    (state->search_mode == STV090x_SEARCH_AUTO)) {
···
 	if (STV090x_WRITE_DEMOD(state, SFRLOW1, 0x80) < 0)
 		goto err;
 
-	if ((state->dev_ver >= 0x20) || (blind_tune == 1) || (state->srate < 10000000)) {
+	if ((state->internal->dev_ver >= 0x20) || (blind_tune == 1) ||
+	    (state->srate < 10000000)) {
 		/* update initial carrier freq with the found freq offset */
 		if (STV090x_WRITE_DEMOD(state, CFRINIT1, f_1) < 0)
 			goto err;
···
 			goto err;
 		state->tuner_bw = stv090x_car_width(srate, state->rolloff) + 10000000;
 
-		if ((state->dev_ver >= 0x20) || (blind_tune == 1)) {
+		if ((state->internal->dev_ver >= 0x20) || (blind_tune == 1)) {
 
 			if (state->algo != STV090x_WARM_SEARCH) {
 
···
 
 	}
 
-	if (state->dev_ver >= 0x20) {
+	if (state->internal->dev_ver >= 0x20) {
 		if (STV090x_WRITE_DEMOD(state, CARFREQ, 0x49) < 0)
 			goto err;
 	}
···
 {
 	u32 reg;
 
-	if (state->dev_ver <= 0x20) {
+	if (state->internal->dev_ver <= 0x20) {
 		/* rolloff to auto mode if DVBS2 */
 		reg = STV090x_READ_DEMOD(state, DEMOD);
 		STV090x_SETFIELD_Px(reg, MANUAL_SXROLLOFF_FIELD, 0x00);
···
 	if (STV090x_WRITE_DEMOD(state, DMDISTATE, 0x5c) < 0) /* Demod stop */
 		goto err;
 
-	if (state->dev_ver >= 0x20) {
+	if (state->internal->dev_ver >= 0x20) {
 		if (state->srate > 5000000) {
 			if (STV090x_WRITE_DEMOD(state, CORRELABS, 0x9e) < 0)
 				goto err;
···
 		if (STV090x_WRITE_DEMOD(state, AGC2REF, 0x38) < 0)
 			goto err;
 
-		if (state->dev_ver >= 0x20) {
+		if (state->internal->dev_ver >= 0x20) {
 			if (STV090x_WRITE_DEMOD(state, KREFTMG, 0x5a) < 0)
 				goto err;
 			if (state->algo == STV090x_COLD_SEARCH)
···
 		if (stv090x_set_srate(state, state->srate) < 0)
 			goto err;
 
-		if (stv090x_set_max_srate(state, state->mclk, state->srate) < 0)
+		if (stv090x_set_max_srate(state, state->internal->mclk,
+					  state->srate) < 0)
 			goto err;
-		if (stv090x_set_min_srate(state, state->mclk, state->srate) < 0)
+		if (stv090x_set_min_srate(state, state->internal->mclk,
+					  state->srate) < 0)
 			goto err;
 
 		if (state->srate >= 10000000)
···
 		reg = STV090x_READ_DEMOD(state, DEMOD);
 		STV090x_SETFIELD_Px(reg, SPECINV_CONTROL_FIELD, state->inversion);
 
-		if (state->dev_ver <= 0x20) {
+		if (state->internal->dev_ver <= 0x20) {
 			/* rolloff to auto mode if DVBS2 */
 			STV090x_SETFIELD_Px(reg, MANUAL_SXROLLOFF_FIELD, 1);
 		} else {
···
 	if ((lock) && (signal_state == STV090x_RANGEOK)) { /* signal within Range */
 		stv090x_optimize_track(state);
 
-		if (state->dev_ver >= 0x20) {
+		if (state->internal->dev_ver >= 0x20) {
 			/* >= Cut 2.0 :release TS reset after
 			 * demod lock and optimized Tracking
 			 */
···
 {
 	struct stv090x_state *state = fe->demodulator_priv;
 
+	state->internal->num_used--;
+	if (state->internal->num_used <= 0) {
+
+		dprintk(FE_ERROR, 1, "Actually removing");
+
+		remove_dev(state->internal);
+		kfree(state->internal);
+	}
+
 	kfree(state);
 }
 
···
 	if (stv090x_write_reg(state, STV090x_NCOARSE, reg) < 0)
 		goto err;
 
-	state->mclk = stv090x_get_mclk(state);
+	state->internal->mclk = stv090x_get_mclk(state);
 
 	/*Set the DiseqC frequency to 22KHz */
-	div = state->mclk / 704000;
+	div = state->internal->mclk / 704000;
 	if (STV090x_WRITE_DEMOD(state, F22TX, div) < 0)
 		goto err;
 	if (STV090x_WRITE_DEMOD(state, F22RX, div) < 0)
···
 {
 	u32 reg;
 
-	if (state->dev_ver >= 0x20) {
+	if (state->internal->dev_ver >= 0x20) {
 		switch (state->config->ts1_mode) {
 		case STV090x_TSMODE_PARALLEL_PUNCTURED:
 		case STV090x_TSMODE_DVBCI:
···
 	}
 
 	/* STV090x init */
-	if (STV090x_WRITE_DEMOD(state, DMDISTATE, 0x5c) < 0) /* Stop Demod */
+
+	/* Stop Demod */
+	if (stv090x_write_reg(state, STV090x_P1_DMDISTATE, 0x5c) < 0)
+		goto err;
+	if (stv090x_write_reg(state, STV090x_P2_DMDISTATE, 0x5c) < 0)
 		goto err;
 
 	msleep(5);
 
-	if (STV090x_WRITE_DEMOD(state, TNRCFG, 0x6c) < 0) /* check register ! (No Tuner Mode) */
+	/* Set No Tuner Mode */
+	if (stv090x_write_reg(state, STV090x_P1_TNRCFG, 0x6c) < 0)
+		goto err;
+	if (stv090x_write_reg(state, STV090x_P2_TNRCFG, 0x6c) < 0)
 		goto err;
 
+	/* I2C repeater OFF */
 	STV090x_SETFIELD_Px(reg, ENARPT_LEVEL_FIELD, config->repeater_level);
-	if (STV090x_WRITE_DEMOD(state, I2CRPT, reg) < 0) /* repeater OFF */
+	if (stv090x_write_reg(state, STV090x_P1_I2CRPT, reg) < 0)
+		goto err;
+	if (stv090x_write_reg(state, STV090x_P2_I2CRPT, reg) < 0)
 		goto err;
 
 	if (stv090x_write_reg(state, STV090x_NCOARSE, 0x13) < 0) /* set PLL divider */
···
 			goto err;
 	}
 
-	state->dev_ver = stv090x_read_reg(state, STV090x_MID);
-	if (state->dev_ver >= 0x20) {
+	state->internal->dev_ver = stv090x_read_reg(state, STV090x_MID);
+	if (state->internal->dev_ver >= 0x20) {
 		if (stv090x_write_reg(state, STV090x_TSGENERAL, 0x0c) < 0)
 			goto err;
 
···
 				goto err;
 		}
 
-	} else if (state->dev_ver < 0x20) {
+	} else if (state->internal->dev_ver < 0x20) {
 		dprintk(FE_ERROR, 1, "ERROR: Unsupported Cut: 0x%02x!",
-			state->dev_ver);
+			state->internal->dev_ver);
 
 		goto err;
-	} else if (state->dev_ver > 0x30) {
+	} else if (state->internal->dev_ver > 0x30) {
 		/* we shouldn't bail out from here */
 		dprintk(FE_ERROR, 1, "INFO: Cut: 0x%02x probably incomplete support!",
-			state->dev_ver);
+			state->internal->dev_ver);
 	}
 
 	if (stv090x_write_reg(state, STV090x_TSTRES0, 0x80) < 0)
···
 				    enum stv090x_demodulator demod)
 {
 	struct stv090x_state *state = NULL;
+	struct stv090x_dev *temp_int;
 
 	state = kzalloc(sizeof (struct stv090x_state), GFP_KERNEL);
 	if (state == NULL)
···
 	state->device				= config->device;
 	state->rolloff				= STV090x_RO_35; /* default */
 
-	if (state->demod == STV090x_DEMODULATOR_0)
-		mutex_init(&demod_lock);
+	temp_int = find_dev(state->i2c,
+				state->config->address);
+
+	if ((temp_int != NULL) && (state->demod_mode == STV090x_DUAL)) {
+		state->internal = temp_int->internal;
+		state->internal->num_used++;
+		dprintk(FE_INFO, 1, "Found Internal Structure!");
+		dprintk(FE_ERROR, 1, "Attaching %s demodulator(%d) Cut=0x%02x",
+			state->device == STV0900 ? "STV0900" : "STV0903",
+			demod,
+			state->internal->dev_ver);
+		return &state->frontend;
+	} else {
+		state->internal = kmalloc(sizeof(struct stv090x_internal),
+					  GFP_KERNEL);
+		temp_int = append_internal(state->internal);
+		state->internal->num_used = 1;
+		state->internal->i2c_adap = state->i2c;
+		state->internal->i2c_addr = state->config->address;
+		dprintk(FE_INFO, 1, "Create New Internal Structure!");
+	}
+
+	mutex_init(&state->internal->demod_lock);
 
 	if (stv090x_sleep(&state->frontend) < 0) {
 		dprintk(FE_ERROR, 1, "Error putting device to sleep");
···
 		goto error;
 	}
 
-	dprintk(FE_ERROR, 1, "Attaching %s demodulator(%d) Cut=0x%02x\n",
+	dprintk(FE_ERROR, 1, "Attaching %s demodulator(%d) Cut=0x%02x",
 	       state->device == STV0900 ? "STV0900" : "STV0903",
 	       demod,
-	       state->dev_ver);
+	       state->internal->dev_ver);
 
 	return &state->frontend;
 

drivers/media/dvb/frontends/stv090x.h

···
 	u32 xtal; /* default: 8000000 */
 	u8 address; /* default: 0x68 */
 
-	u32 ref_clk; /* default: 16000000 FIXME to tuner config */
-
 	u8 ts1_mode;
 	u8 ts2_mode;
 

drivers/media/dvb/frontends/stv090x_priv.h

···
 	s32 read;
 };
 
+struct stv090x_internal {
+	struct i2c_adapter 	*i2c_adap;
+	u8			i2c_addr;
+
+	struct mutex		demod_lock; /* Lock access to shared register */
+	s32			mclk; /* Masterclock Divider factor */
+	u32			dev_ver;
+
+	int			num_used;
+};
+
 struct stv090x_state {
 	enum stv090x_device		device;
 	enum stv090x_demodulator	demod;
 	enum stv090x_mode		demod_mode;
-	u32				dev_ver;
+	struct stv090x_internal		*internal;
 
 	struct i2c_adapter		*i2c;
 	const struct stv090x_config	*config;
···
 	u32				frequency;
 	u32				srate;
 
-	s32				mclk; /* Masterclock Divider factor */
 	s32				tuner_bw;
-
-	u32				tuner_refclk;
 
 	s32				search_range;
 

drivers/media/dvb/ttpci/budget.c

···
 
 	.xtal			= 27000000,
 	.address		= 0x68,
-	.ref_clk		= 27000000,
 
 	.ts1_mode		= STV090x_TSMODE_DVBCI,
 	.ts2_mode		= STV090x_TSMODE_SERIAL_CONTINUOUS,