V4L/DVB (7568): Support for DVB-S demod PN1010 (clone of S5H1420) added

This device is a clone of the PN1010 used by SkyStar2 rev2.7 .

This patch adds support for the flexcop-device and makes the driver look a little bit nicer.

It needs to be checked whether the driver is still ok for the budget-cards.

Signed-off-by: Patrick Boettcher <pb@linuxtv.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

1 files changed, 332 insertions, 189 deletions

diff --git a/drivers/media/dvb/frontends/s5h1420.c b/drivers/media/dvb/frontends/s5h1420.c
index 1e2d602d371..281e1cb2edc 100644
--- a/drivers/media/dvb/frontends/s5h1420.c
+++ b/drivers/media/dvb/frontends/s5h1420.c
@@ -1,24 +1,26 @@
 /*
-Driver for Samsung S5H1420 QPSK Demodulator
-
-Copyright (C) 2005 Andrew de Quincey <adq_dvb@lidskialf.net>
-
-This program is free software; you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation; either version 2 of the License, or
-(at your option) any later version.
-
-This program is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-
-GNU General Public License for more details.
-
-You should have received a copy of the GNU General Public License
-along with this program; if not, write to the Free Software
-Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
-
-*/
+ * Driver for
+ *    Samsung S5H1420 and
+ *    PnpNetwork PN1010 QPSK Demodulator
+ *
+ * Copyright (C) 2005 Andrew de Quincey <adq_dvb@lidskialf.net>
+ * Copyright (C) 2005-8 Patrick Boettcher <pb@linuxtv.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
 
 #include <linux/kernel.h>
 #include <linux/module.h>
@@ -29,23 +31,35 @@ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 #include <linux/jiffies.h>
 #include <asm/div64.h>
 
-#include "dvb_frontend.h"
-#include "s5h1420.h"
+#include <linux/i2c.h>
 
 
+#include "dvb_frontend.h"
+#include "s5h1420.h"
+#include "s5h1420_priv.h"
 
 #define TONE_FREQ 22000
 
 struct s5h1420_state {
 	struct i2c_adapter* i2c;
 	const struct s5h1420_config* config;
+
 	struct dvb_frontend frontend;
+	struct i2c_adapter tuner_i2c_adapter;
+
+	u8 CON_1_val;
 
 	u8 postlocked:1;
 	u32 fclk;
 	u32 tunedfreq;
 	fe_code_rate_t fec_inner;
 	u32 symbol_rate;
+
+	/* FIXME: ugly workaround for flexcop's incapable i2c-controller
+	 * it does not support repeated-start, workaround: write addr-1
+	 * and then read
+	 */
+	u8 shadow[255];
 };
 
 static u32 s5h1420_getsymbolrate(struct s5h1420_state* state);
@@ -54,43 +68,65 @@ static int s5h1420_get_tune_settings(struct dvb_frontend* fe,
 
 
 static int debug;
-#define dprintk if (debug) printk
+module_param(debug, int, 0644);
+MODULE_PARM_DESC(debug, "enable debugging");
+
+#define dprintk(x...) do { \
+	if (debug) \
+		printk(KERN_DEBUG "S5H1420: " x); \
+} while (0)
+
+static u8 s5h1420_readreg(struct s5h1420_state *state, u8 reg)
+{
+	int ret;
+	u8 b[2];
+	struct i2c_msg msg[] = {
+		{ .addr = state->config->demod_address, .flags = 0, .buf = b, .len = 2 },
+		{ .addr = state->config->demod_address, .flags = 0, .buf = &reg, .len = 1 },
+		{ .addr = state->config->demod_address, .flags = I2C_M_RD, .buf = b, .len = 1 },
+	};
+
+	b[0] = (reg - 1) & 0xff;
+	b[1] = state->shadow[(reg - 1) & 0xff];
+
+	if (state->config->repeated_start_workaround) {
+		ret = i2c_transfer(state->i2c, msg, 3);
+		if (ret != 3)
+			return ret;
+	} else {
+		ret = i2c_transfer(state->i2c, &msg[1], 2);
+		if (ret != 2)
+			return ret;
+	}
+
+	/* dprintk("rd(%02x): %02x %02x\n", state->config->demod_address, reg, b[0]); */
+
+	return b[0];
+}
 
 static int s5h1420_writereg (struct s5h1420_state* state, u8 reg, u8 data)
 {
-	u8 buf [] = { reg, data };
+	u8 buf[] = { reg, data };
 	struct i2c_msg msg = { .addr = state->config->demod_address, .flags = 0, .buf = buf, .len = 2 };
 	int err;
 
-	if ((err = i2c_transfer (state->i2c, &msg, 1)) != 1) {
-		dprintk ("%s: writereg error (err == %i, reg == 0x%02x, data == 0x%02x)\n", __func__, err, reg, data);
+	/* dprintk("wr(%02x): %02x %02x\n", state->config->demod_address, reg, data); */
+	err = i2c_transfer(state->i2c, &msg, 1);
+	if (err != 1) {
+		dprintk("%s: writereg error (err == %i, reg == 0x%02x, data == 0x%02x)\n", __func__, err, reg, data);
 		return -EREMOTEIO;
 	}
+	state->shadow[reg] = data;
 
 	return 0;
 }
 
-static u8 s5h1420_readreg (struct s5h1420_state* state, u8 reg)
-{
-	int ret;
-	u8 b0 [] = { reg };
-	u8 b1 [] = { 0 };
-	struct i2c_msg msg1 = { .addr = state->config->demod_address, .flags = 0, .buf = b0, .len = 1 };
-	struct i2c_msg msg2 = { .addr = state->config->demod_address, .flags = I2C_M_RD, .buf = b1, .len = 1 };
-
-	if ((ret = i2c_transfer (state->i2c, &msg1, 1)) != 1)
-		return ret;
-
-	if ((ret = i2c_transfer (state->i2c, &msg2, 1)) != 1)
-		return ret;
-
-	return b1[0];
-}
-
 static int s5h1420_set_voltage (struct dvb_frontend* fe, fe_sec_voltage_t voltage)
 {
 	struct s5h1420_state* state = fe->demodulator_priv;
 
+	dprintk("enter %s\n", __func__);
+
 	switch(voltage) {
 	case SEC_VOLTAGE_13:
 		s5h1420_writereg(state, 0x3c,
@@ -106,6 +142,7 @@ static int s5h1420_set_voltage (struct dvb_frontend* fe, fe_sec_voltage_t voltag
 		break;
 	}
 
+	dprintk("leave %s\n", __func__);
 	return 0;
 }
 
@@ -113,6 +150,7 @@ static int s5h1420_set_tone (struct dvb_frontend* fe, fe_sec_tone_mode_t tone)
 {
 	struct s5h1420_state* state = fe->demodulator_priv;
 
+	dprintk("enter %s\n", __func__);
 	switch(tone) {
 	case SEC_TONE_ON:
 		s5h1420_writereg(state, 0x3b,
@@ -124,6 +162,7 @@ static int s5h1420_set_tone (struct dvb_frontend* fe, fe_sec_tone_mode_t tone)
 				 (s5h1420_readreg(state, 0x3b) & 0x74) | 0x01);
 		break;
 	}
+	dprintk("leave %s\n", __func__);
 
 	return 0;
 }
@@ -137,6 +176,7 @@ static int s5h1420_send_master_cmd (struct dvb_frontend* fe,
 	unsigned long timeout;
 	int result = 0;
 
+	dprintk("enter %s\n", __func__);
 	if (cmd->msg_len > 8)
 		return -EINVAL;
 
@@ -168,6 +208,7 @@ static int s5h1420_send_master_cmd (struct dvb_frontend* fe,
 	/* restore original settings */
 	s5h1420_writereg(state, 0x3b, val);
 	msleep(15);
+	dprintk("leave %s\n", __func__);
 	return result;
 }
 
@@ -289,6 +330,8 @@ static int s5h1420_read_status(struct dvb_frontend* fe, fe_status_t* status)
 	struct s5h1420_state* state = fe->demodulator_priv;
 	u8 val;
 
+	dprintk("enter %s\n", __func__);
+
 	if (status == NULL)
 		return -EINVAL;
 
@@ -297,13 +340,13 @@ static int s5h1420_read_status(struct dvb_frontend* fe, fe_status_t* status)
 
 	/* fix for FEC 5/6 inversion issue - if it doesn't quite lock, invert
 	the inversion, wait a bit and check again */
-	if (*status == (FE_HAS_SIGNAL|FE_HAS_CARRIER|FE_HAS_VITERBI)) {
-		val = s5h1420_readreg(state, 0x32);
+	if (*status == (FE_HAS_SIGNAL | FE_HAS_CARRIER | FE_HAS_VITERBI)) {
+		val = s5h1420_readreg(state, Vit10);
 		if ((val & 0x07) == 0x03) {
 			if (val & 0x08)
-				s5h1420_writereg(state, 0x31, 0x13);
+				s5h1420_writereg(state, Vit09, 0x13);
 			else
-				s5h1420_writereg(state, 0x31, 0x1b);
+				s5h1420_writereg(state, Vit09, 0x1b);
 
 			/* wait a bit then update lock status */
 			mdelay(200);
@@ -312,68 +355,73 @@ static int s5h1420_read_status(struct dvb_frontend* fe, fe_status_t* status)
 	}
 
 	/* perform post lock setup */
-	if ((*status & FE_HAS_LOCK) && (!state->postlocked)) {
+	if ((*status & FE_HAS_LOCK) && !state->postlocked) {
 
 		/* calculate the data rate */
 		u32 tmp = s5h1420_getsymbolrate(state);
-		switch(s5h1420_readreg(state, 0x32) & 0x07) {
-		case 0:
-			tmp = (tmp * 2 * 1) / 2;
-			break;
-
-		case 1:
-			tmp = (tmp * 2 * 2) / 3;
-			break;
-
-		case 2:
-			tmp = (tmp * 2 * 3) / 4;
-			break;
-
-		case 3:
-			tmp = (tmp * 2 * 5) / 6;
-			break;
-
-		case 4:
-			tmp = (tmp * 2 * 6) / 7;
-			break;
-
-		case 5:
-			tmp = (tmp * 2 * 7) / 8;
-			break;
+		switch (s5h1420_readreg(state, Vit10) & 0x07) {
+		case 0: tmp = (tmp * 2 * 1) / 2; break;
+		case 1: tmp = (tmp * 2 * 2) / 3; break;
+		case 2: tmp = (tmp * 2 * 3) / 4; break;
+		case 3: tmp = (tmp * 2 * 5) / 6; break;
+		case 4: tmp = (tmp * 2 * 6) / 7; break;
+		case 5: tmp = (tmp * 2 * 7) / 8; break;
 		}
+
 		if (tmp == 0) {
-			printk("s5h1420: avoided division by 0\n");
+			printk(KERN_ERR "s5h1420: avoided division by 0\n");
 			tmp = 1;
 		}
 		tmp = state->fclk / tmp;
 
+
 		/* set the MPEG_CLK_INTL for the calculated data rate */
-		if (tmp < 4)
+		if (tmp < 2)
 			val = 0x00;
-		else if (tmp < 8)
+		else if (tmp < 5)
 			val = 0x01;
-		else if (tmp < 12)
+		else if (tmp < 9)
 			val = 0x02;
-		else if (tmp < 16)
+		else if (tmp < 13)
 			val = 0x03;
-		else if (tmp < 24)
+		else if (tmp < 17)
 			val = 0x04;
-		else if (tmp < 32)
+		else if (tmp < 25)
 			val = 0x05;
-		else
+		else if (tmp < 33)
 			val = 0x06;
-		s5h1420_writereg(state, 0x22, val);
+		else
+			val = 0x07;
+		dprintk("for MPEG_CLK_INTL %d %x\n", tmp, val);
+
+		s5h1420_writereg(state, FEC01, 0x18);
+		s5h1420_writereg(state, FEC01, 0x10);
+		s5h1420_writereg(state, FEC01, val);
+
+		/* Enable "MPEG_Out" */
+		val = s5h1420_readreg(state, Mpeg02);
+		s5h1420_writereg(state, Mpeg02, val | (1 << 6));
 
-		/* DC freeze */
-		s5h1420_writereg(state, 0x1f, s5h1420_readreg(state, 0x1f) | 0x01);
+		/* kicker disable */
+		val = s5h1420_readreg(state, QPSK01) & 0x7f;
+		s5h1420_writereg(state, QPSK01, val);
 
-		/* kicker disable + remove DC offset */
-		s5h1420_writereg(state, 0x05, s5h1420_readreg(state, 0x05) & 0x6f);
+		/* DC freeze TODO it was never activated by default or it can stay activated */
+
+		if (s5h1420_getsymbolrate(state) >= 20000000) {
+			s5h1420_writereg(state, Loop04, 0x8a);
+			s5h1420_writereg(state, Loop05, 0x6a);
+		} else {
+			s5h1420_writereg(state, Loop04, 0x58);
+			s5h1420_writereg(state, Loop05, 0x27);
+		}
 
 		/* post-lock processing has been done! */
 		state->postlocked = 1;
 	}
 
+	dprintk("leave %s\n", __func__);
+
 	return 0;
 }
 
@@ -414,6 +462,7 @@ static int s5h1420_read_ucblocks(struct dvb_frontend* fe, u32* ucblocks)
 
 static void s5h1420_reset(struct s5h1420_state* state)
 {
+	dprintk("%s\n", __func__);
 	s5h1420_writereg (state, 0x01, 0x08);
 	s5h1420_writereg (state, 0x01, 0x00);
 	udelay(10);
@@ -422,54 +471,52 @@ static void s5h1420_reset(struct s5h1420_state* state)
 static void s5h1420_setsymbolrate(struct s5h1420_state* state,
 				  struct dvb_frontend_parameters *p)
 {
+	u8 v;
 	u64 val;
 
+	dprintk("enter %s\n", __func__);
+
 	val = ((u64) p->u.qpsk.symbol_rate / 1000ULL) * (1ULL<<24);
-	if (p->u.qpsk.symbol_rate <= 21000000) {
+	if (p->u.qpsk.symbol_rate < 29000000)
 		val *= 2;
-	}
 	do_div(val, (state->fclk / 1000));
 
-	s5h1420_writereg(state, 0x09, s5h1420_readreg(state, 0x09) & 0x7f);
-	s5h1420_writereg(state, 0x11, val >> 16);
-	s5h1420_writereg(state, 0x12, val >> 8);
-	s5h1420_writereg(state, 0x13, val & 0xff);
-	s5h1420_writereg(state, 0x09, s5h1420_readreg(state, 0x09) | 0x80);
+	dprintk("symbol rate register: %06llx\n", val);
+
+	v = s5h1420_readreg(state, Loop01);
+	s5h1420_writereg(state, Loop01, v & 0x7f);
+	s5h1420_writereg(state, Tnco01, val >> 16);
+	s5h1420_writereg(state, Tnco02, val >> 8);
+	s5h1420_writereg(state, Tnco03, val & 0xff);
+	s5h1420_writereg(state, Loop01,  v | 0x80);
+	dprintk("leave %s\n", __func__);
 }
 
 static u32 s5h1420_getsymbolrate(struct s5h1420_state* state)
 {
-	u64 val = 0;
-	int sampling = 2;
-
-	if (s5h1420_readreg(state, 0x05) & 0x2)
-		sampling = 1;
-
-	s5h1420_writereg(state, 0x06, s5h1420_readreg(state, 0x06) | 0x08);
-	val  = s5h1420_readreg(state, 0x11) << 16;
-	val |= s5h1420_readreg(state, 0x12) << 8;
-	val |= s5h1420_readreg(state, 0x13);
-	s5h1420_writereg(state, 0x06, s5h1420_readreg(state, 0x06) & 0xf7);
-
-	val *= (state->fclk / 1000ULL);
-	do_div(val, ((1<<24) * sampling));
-
-	return (u32) (val * 1000ULL);
+	return state->symbol_rate;
 }
 
 static void s5h1420_setfreqoffset(struct s5h1420_state* state, int freqoffset)
 {
 	int val;
+	u8 v;
+
+	dprintk("enter %s\n", __func__);
 
 	/* remember freqoffset is in kHz, but the chip wants the offset in Hz, so
 	 * divide fclk by 1000000 to get the correct value. */
 	val = -(int) ((freqoffset * (1<<24)) / (state->fclk / 1000000));
 
-	s5h1420_writereg(state, 0x09, s5h1420_readreg(state, 0x09) & 0xbf);
-	s5h1420_writereg(state, 0x0e, val >> 16);
-	s5h1420_writereg(state, 0x0f, val >> 8);
-	s5h1420_writereg(state, 0x10, val & 0xff);
-	s5h1420_writereg(state, 0x09, s5h1420_readreg(state, 0x09) | 0x40);
+	dprintk("phase rotator/freqoffset: %d %06x\n", freqoffset, val);
+
+	v = s5h1420_readreg(state, Loop01);
+	s5h1420_writereg(state, Loop01, v & 0xbf);
+	s5h1420_writereg(state, Pnco01, val >> 16);
+	s5h1420_writereg(state, Pnco02, val >> 8);
+	s5h1420_writereg(state, Pnco03, val & 0xff);
+	s5h1420_writereg(state, Loop01, v | 0x40);
+	dprintk("leave %s\n", __func__);
 }
 
 static int s5h1420_getfreqoffset(struct s5h1420_state* state)
@@ -496,52 +543,53 @@ static void s5h1420_setfec_inversion(struct s5h1420_state* state,
 				     struct dvb_frontend_parameters *p)
 {
 	u8 inversion = 0;
+	u8 vit08, vit09;
+
+	dprintk("enter %s\n", __func__);
 
-	if (p->inversion == INVERSION_OFF) {
+	if (p->inversion == INVERSION_OFF)
 		inversion = state->config->invert ? 0x08 : 0;
-	} else if (p->inversion == INVERSION_ON) {
+	else if (p->inversion == INVERSION_ON)
 		inversion = state->config->invert ? 0 : 0x08;
-	}
 
 	if ((p->u.qpsk.fec_inner == FEC_AUTO) || (p->inversion == INVERSION_AUTO)) {
-		s5h1420_writereg(state, 0x30, 0x3f);
-		s5h1420_writereg(state, 0x31, 0x00 | inversion);
+		vit08 = 0x3f;
+		vit09 = 0;
 	} else {
 		switch(p->u.qpsk.fec_inner) {
 		case FEC_1_2:
-			s5h1420_writereg(state, 0x30, 0x01);
-			s5h1420_writereg(state, 0x31, 0x10 | inversion);
+			vit08 = 0x01; vit09 = 0x10;
 			break;
 
 		case FEC_2_3:
-			s5h1420_writereg(state, 0x30, 0x02);
-			s5h1420_writereg(state, 0x31, 0x11 | inversion);
+			vit08 = 0x02; vit09 = 0x11;
 			break;
 
 		case FEC_3_4:
-			s5h1420_writereg(state, 0x30, 0x04);
-			s5h1420_writereg(state, 0x31, 0x12 | inversion);
+			vit08 = 0x04; vit09 = 0x12;
 			break;
 
 		case FEC_5_6:
-			s5h1420_writereg(state, 0x30, 0x08);
-			s5h1420_writereg(state, 0x31, 0x13 | inversion);
+			vit08 = 0x08; vit09 = 0x13;
 			break;
 
 		case FEC_6_7:
-			s5h1420_writereg(state, 0x30, 0x10);
-			s5h1420_writereg(state, 0x31, 0x14 | inversion);
+			vit08 = 0x10; vit09 = 0x14;
 			break;
 
 		case FEC_7_8:
-			s5h1420_writereg(state, 0x30, 0x20);
-			s5h1420_writereg(state, 0x31, 0x15 | inversion);
+			vit08 = 0x20; vit09 = 0x15;
 			break;
 
 		default:
 			return;
 		}
 	}
+	vit09 |= inversion;
+	dprintk("fec: %02x %02x\n", vit08, vit09);
+	s5h1420_writereg(state, Vit08, vit08);
+	s5h1420_writereg(state, Vit09, vit09);
+	dprintk("leave %s\n", __func__);
 }
 
 static fe_code_rate_t s5h1420_getfec(struct s5h1420_state* state)
@@ -583,16 +631,19 @@ static int s5h1420_set_frontend(struct dvb_frontend* fe,
 	struct s5h1420_state* state = fe->demodulator_priv;
 	int frequency_delta;
 	struct dvb_frontend_tune_settings fesettings;
+	uint8_t clock_settting;
+
+	dprintk("enter %s\n", __func__);
 
 	/* check if we should do a fast-tune */
 	memcpy(&fesettings.parameters, p, sizeof(struct dvb_frontend_parameters));
 	s5h1420_get_tune_settings(fe, &fesettings);
 	frequency_delta = p->frequency - state->tunedfreq;
 	if ((frequency_delta > -fesettings.max_drift) &&
-	    (frequency_delta < fesettings.max_drift) &&
-	    (frequency_delta != 0) &&
-	    (state->fec_inner == p->u.qpsk.fec_inner) &&
-	    (state->symbol_rate == p->u.qpsk.symbol_rate)) {
+			(frequency_delta < fesettings.max_drift) &&
+			(frequency_delta != 0) &&
+			(state->fec_inner == p->u.qpsk.fec_inner) &&
+			(state->symbol_rate == p->u.qpsk.symbol_rate)) {
 
 		if (fe->ops.tuner_ops.set_params) {
 			fe->ops.tuner_ops.set_params(fe, p);
@@ -606,54 +657,93 @@ static int s5h1420_set_frontend(struct dvb_frontend* fe,
 		} else {
 			s5h1420_setfreqoffset(state, 0);
 		}
+		dprintk("simple tune\n");
 		return 0;
 	}
+	dprintk("tuning demod\n");
 
 	/* first of all, software reset */
 	s5h1420_reset(state);
 
 	/* set s5h1420 fclk PLL according to desired symbol rate */
-	if (p->u.qpsk.symbol_rate > 28000000) {
-		state->fclk = 88000000;
-		s5h1420_writereg(state, 0x03, 0x50);
-		s5h1420_writereg(state, 0x04, 0x40);
-		s5h1420_writereg(state, 0x05, 0xae);
-	} else if (p->u.qpsk.symbol_rate > 21000000) {
+	if (p->u.qpsk.symbol_rate > 33000000)
+		state->fclk = 80000000;
+	else if (p->u.qpsk.symbol_rate > 28500000)
 		state->fclk = 59000000;
-		s5h1420_writereg(state, 0x03, 0x33);
-		s5h1420_writereg(state, 0x04, 0x40);
-		s5h1420_writereg(state, 0x05, 0xae);
-	} else {
+	else if (p->u.qpsk.symbol_rate > 25000000)
+		state->fclk = 86000000;
+	else if (p->u.qpsk.symbol_rate > 1900000)
 		state->fclk = 88000000;
-		s5h1420_writereg(state, 0x03, 0x50);
-		s5h1420_writereg(state, 0x04, 0x40);
-		s5h1420_writereg(state, 0x05, 0xac);
+	else
+		state->fclk = 44000000;
+
+	/* Clock */
+	switch (state->fclk) {
+	default:
+	case 88000000:
+		clock_settting = 80;
+		break;
+	case 86000000:
+		clock_settting = 78;
+		break;
+	case 80000000:
+		clock_settting = 72;
+		break;
+	case 59000000:
+		clock_settting = 51;
+		break;
+	case 44000000:
+		clock_settting = 36;
+		break;
 	}
+	dprintk("pll01: %d, ToneFreq: %d\n", state->fclk/1000000 - 8, (state->fclk + (TONE_FREQ * 32) - 1) / (TONE_FREQ * 32));
+	s5h1420_writereg(state, PLL01, state->fclk/1000000 - 8);
+	s5h1420_writereg(state, PLL02, 0x40);
+	s5h1420_writereg(state, DiS01, (state->fclk + (TONE_FREQ * 32) - 1) / (TONE_FREQ * 32));
 
-	/* set misc registers */
-	s5h1420_writereg(state, 0x02, 0x00);
-	s5h1420_writereg(state, 0x06, 0x00);
-	s5h1420_writereg(state, 0x07, 0xb0);
-	s5h1420_writereg(state, 0x0a, 0xe7);
-	s5h1420_writereg(state, 0x0b, 0x78);
-	s5h1420_writereg(state, 0x0c, 0x48);
-	s5h1420_writereg(state, 0x0d, 0x6b);
-	s5h1420_writereg(state, 0x2e, 0x8e);
-	s5h1420_writereg(state, 0x35, 0x33);
-	s5h1420_writereg(state, 0x38, 0x01);
-	s5h1420_writereg(state, 0x39, 0x7d);
-	s5h1420_writereg(state, 0x3a, (state->fclk + (TONE_FREQ * 32) - 1) / (TONE_FREQ * 32));
-	s5h1420_writereg(state, 0x3c, 0x00);
-	s5h1420_writereg(state, 0x45, 0x61);
-	s5h1420_writereg(state, 0x46, 0x1d);
+	/* TODO DC offset removal, config parameter ? */
+	if (p->u.qpsk.symbol_rate > 29000000)
+		s5h1420_writereg(state, QPSK01, 0xae | 0x10);
+	else
+		s5h1420_writereg(state, QPSK01, 0xac | 0x10);
 
-	/* start QPSK */
-	s5h1420_writereg(state, 0x05, s5h1420_readreg(state, 0x05) | 1);
+	/* set misc registers */
+	s5h1420_writereg(state, CON_1, 0x00);
+	s5h1420_writereg(state, QPSK02, 0x00);
+	s5h1420_writereg(state, Pre01, 0xb0);
+
+	s5h1420_writereg(state, Loop01, 0xF0);
+	s5h1420_writereg(state, Loop02, 0x2a); /* e7 for s5h1420 */
+	s5h1420_writereg(state, Loop03, 0x79); /* 78 for s5h1420 */
+	if (p->u.qpsk.symbol_rate > 20000000)
+		s5h1420_writereg(state, Loop04, 0x79);
+	else
+		s5h1420_writereg(state, Loop04, 0x58);
+	s5h1420_writereg(state, Loop05, 0x6b);
+
+	if (p->u.qpsk.symbol_rate >= 8000000)
+		s5h1420_writereg(state, Post01, (0 << 6) | 0x10);
+	else if (p->u.qpsk.symbol_rate >= 4000000)
+		s5h1420_writereg(state, Post01, (1 << 6) | 0x10);
+	else
+		s5h1420_writereg(state, Post01, (3 << 6) | 0x10);
+
+	s5h1420_writereg(state, Monitor12, 0x00); /* unfreeze DC compensation */
+
+	s5h1420_writereg(state, Sync01, 0x33);
+	s5h1420_writereg(state, Mpeg01, state->config->cdclk_polarity);
+	s5h1420_writereg(state, Mpeg02, 0x3d); /* Parallel output more, disabled -> enabled later */
+	s5h1420_writereg(state, Err01, 0x03); /* 0x1d for s5h1420 */
+
+	s5h1420_writereg(state, Vit06, 0x6e); /* 0x8e for s5h1420 */
+	s5h1420_writereg(state, DiS03, 0x00);
+	s5h1420_writereg(state, Rf01, 0x61); /* Tuner i2c address - for the gate controller */
 
 	/* set tuner PLL */
 	if (fe->ops.tuner_ops.set_params) {
 		fe->ops.tuner_ops.set_params(fe, p);
-		if (fe->ops.i2c_gate_ctrl) fe->ops.i2c_gate_ctrl(fe, 0);
+		if (fe->ops.i2c_gate_ctrl)
+			fe->ops.i2c_gate_ctrl(fe, 0);
 		s5h1420_setfreqoffset(state, 0);
 	}
 
@@ -661,10 +751,15 @@ static int s5h1420_set_frontend(struct dvb_frontend* fe,
 	s5h1420_setsymbolrate(state, p);
 	s5h1420_setfec_inversion(state, p);
 
+	/* start QPSK */
+	s5h1420_writereg(state, QPSK01, s5h1420_readreg(state, QPSK01) | 1);
+
 	state->fec_inner = p->u.qpsk.fec_inner;
 	state->symbol_rate = p->u.qpsk.symbol_rate;
 	state->postlocked = 0;
 	state->tunedfreq = p->frequency;
+
+	dprintk("leave %s\n", __func__);
 	return 0;
 }
 
@@ -717,11 +812,10 @@ static int s5h1420_i2c_gate_ctrl(struct dvb_frontend* fe, int enable)
 {
 	struct s5h1420_state* state = fe->demodulator_priv;
 
-	if (enable) {
-		return s5h1420_writereg (state, 0x02, s5h1420_readreg(state,0x02) | 1);
-	} else {
-		return s5h1420_writereg (state, 0x02, s5h1420_readreg(state,0x02) & 0xfe);
-	}
+	if (enable)
+		return s5h1420_writereg(state, 0x02, state->CON_1_val | 1);
+	else
+		return s5h1420_writereg(state, 0x02, state->CON_1_val & 0xfe);
 }
 
 static int s5h1420_init (struct dvb_frontend* fe)
@@ -729,7 +823,8 @@ static int s5h1420_init (struct dvb_frontend* fe)
 	struct s5h1420_state* state = fe->demodulator_priv;
 
 	/* disable power down and do reset */
-	s5h1420_writereg(state, 0x02, 0x10);
+	state->CON_1_val = 0x10;
+	s5h1420_writereg(state, 0x02, state->CON_1_val);
 	msleep(10);
 	s5h1420_reset(state);
 
@@ -739,26 +834,60 @@ static int s5h1420_init (struct dvb_frontend* fe)
 static int s5h1420_sleep(struct dvb_frontend* fe)
 {
 	struct s5h1420_state* state = fe->demodulator_priv;
-
-	return s5h1420_writereg(state, 0x02, 0x12);
+	state->CON_1_val = 0x12;
+	return s5h1420_writereg(state, 0x02, state->CON_1_val);
 }
 
 static void s5h1420_release(struct dvb_frontend* fe)
 {
 	struct s5h1420_state* state = fe->demodulator_priv;
+	i2c_del_adapter(&state->tuner_i2c_adapter);
 	kfree(state);
 }
 
-static struct dvb_frontend_ops s5h1420_ops;
+static u32 s5h1420_tuner_i2c_func(struct i2c_adapter *adapter)
+{
+	return I2C_FUNC_I2C;
+}
+
+static int s5h1420_tuner_i2c_tuner_xfer(struct i2c_adapter *i2c_adap, struct i2c_msg msg[], int num)
+{
+	struct s5h1420_state *state = i2c_get_adapdata(i2c_adap);
+	struct i2c_msg m[1 + num];
+	u8 tx_open[2] = { CON_1, state->CON_1_val | 1 }; /* repeater stops once there was a stop condition */
+
+	memset(m, 0, sizeof(struct i2c_msg) * (1 + num));
+
+	m[0].addr = state->config->demod_address;
+	m[0].buf  = tx_open;
+	m[0].len  = 2;
 
-struct dvb_frontend* s5h1420_attach(const struct s5h1420_config* config,
-				    struct i2c_adapter* i2c)
+	memcpy(&m[1], msg, sizeof(struct i2c_msg) * num);
+
+	return i2c_transfer(state->i2c, m, 1+num) == 1 + num ? num : -EIO;
+}
+
+static struct i2c_algorithm s5h1420_tuner_i2c_algo = {
+	.master_xfer   = s5h1420_tuner_i2c_tuner_xfer,
+	.functionality = s5h1420_tuner_i2c_func,
+};
+
+struct i2c_adapter *s5h1420_get_tuner_i2c_adapter(struct dvb_frontend *fe)
 {
-	struct s5h1420_state* state = NULL;
-	u8 identity;
+	struct s5h1420_state *state = fe->demodulator_priv;
+	return &state->tuner_i2c_adapter;
+}
+EXPORT_SYMBOL(s5h1420_get_tuner_i2c_adapter);
+
+static struct dvb_frontend_ops s5h1420_ops;
 
+struct dvb_frontend *s5h1420_attach(const struct s5h1420_config *config,
+				    struct i2c_adapter *i2c)
+{
 	/* allocate memory for the internal state */
-	state = kmalloc(sizeof(struct s5h1420_state), GFP_KERNEL);
+	struct s5h1420_state *state = kzalloc(sizeof(struct s5h1420_state), GFP_KERNEL);
+	u8 i;
+
 	if (state == NULL)
 		goto error;
 
@@ -772,24 +901,42 @@ struct dvb_frontend* s5h1420_attach(const struct s5h1420_config* config,
 	state->symbol_rate = 0;
 
 	/* check if the demod is there + identify it */
-	identity = s5h1420_readreg(state, 0x00);
-	if (identity != 0x03)
+	i = s5h1420_readreg(state, ID01);
+	if (i != 0x03)
 		goto error;
 
+	memset(state->shadow, 0xff, sizeof(state->shadow));
+
+	for (i = 0; i < 0x50; i++)
+		state->shadow[i] = s5h1420_readreg(state, i);
+
 	/* create dvb_frontend */
 	memcpy(&state->frontend.ops, &s5h1420_ops, sizeof(struct dvb_frontend_ops));
 	state->frontend.demodulator_priv = state;
+
+	/* create tuner i2c adapter */
+	strncpy(state->tuner_i2c_adapter.name, "S5H1420-PN1010 tuner I2C bus", I2C_NAME_SIZE);
+	state->tuner_i2c_adapter.class     = I2C_CLASS_TV_DIGITAL,
+	state->tuner_i2c_adapter.algo      = &s5h1420_tuner_i2c_algo;
+	state->tuner_i2c_adapter.algo_data = NULL;
+	i2c_set_adapdata(&state->tuner_i2c_adapter, state);
+	if (i2c_add_adapter(&state->tuner_i2c_adapter) < 0) {
+		printk(KERN_ERR "S5H1420/PN1010: tuner i2c bus could not be initialized\n");
+		goto error;
+	}
+
 	return &state->frontend;
 
 error:
 	kfree(state);
 	return NULL;
 }
+EXPORT_SYMBOL(s5h1420_attach);
 
 static struct dvb_frontend_ops s5h1420_ops = {
 
 	.info = {
-		.name     = "Samsung S5H1420 DVB-S",
+		.name     = "Samsung S5H1420/PnpNetwork PN1010 DVB-S",
 		.type     = FE_QPSK,
 		.frequency_min    = 950000,
 		.frequency_max    = 2150000,
@@ -826,10 +973,6 @@ static struct dvb_frontend_ops s5h1420_ops = {
 	.set_voltage = s5h1420_set_voltage,
 };
 
-module_param(debug, int, 0644);
-
-MODULE_DESCRIPTION("Samsung S5H1420 DVB-S Demodulator driver");
-MODULE_AUTHOR("Andrew de Quincey");
+MODULE_DESCRIPTION("Samsung S5H1420/PnpNetwork PN1010 DVB-S Demodulator driver");
+MODULE_AUTHOR("Andrew de Quincey, Patrick Boettcher");
 MODULE_LICENSE("GPL");
-
-EXPORT_SYMBOL(s5h1420_attach);