Adding upstream version 6.6.15.upstream/6.6.15

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 964 insertions, 0 deletions

diff --git a/drivers/media/dvb-frontends/s5h1420.c b/drivers/media/dvb-frontends/s5h1420.c
new file mode 100644
index 0000000000..d700de1ea6
--- /dev/null
+++ b/drivers/media/dvb-frontends/s5h1420.c
@@ -0,0 +1,964 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * 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>
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/string.h>
+#include <linux/slab.h>
+#include <linux/delay.h>
+#include <linux/jiffies.h>
+#include <asm/div64.h>
+
+#include <linux/i2c.h>
+
+
+#include <media/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;
+	enum fe_code_rate 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[256];
+};
+
+static u32 s5h1420_getsymbolrate(struct s5h1420_state* state);
+static int s5h1420_get_tune_settings(struct dvb_frontend* fe,
+				     struct dvb_frontend_tune_settings* fesettings);
+
+
+static int debug;
+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], 1);
+		if (ret != 1)
+			return ret;
+		ret = i2c_transfer(state->i2c, &msg[2], 1);
+		if (ret != 1)
+			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 };
+	struct i2c_msg msg = { .addr = state->config->demod_address, .flags = 0, .buf = buf, .len = 2 };
+	int err;
+
+	/* 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 int s5h1420_set_voltage(struct dvb_frontend *fe,
+			       enum fe_sec_voltage voltage)
+{
+	struct s5h1420_state* state = fe->demodulator_priv;
+
+	dprintk("enter %s\n", __func__);
+
+	switch(voltage) {
+	case SEC_VOLTAGE_13:
+		s5h1420_writereg(state, 0x3c,
+				 (s5h1420_readreg(state, 0x3c) & 0xfe) | 0x02);
+		break;
+
+	case SEC_VOLTAGE_18:
+		s5h1420_writereg(state, 0x3c, s5h1420_readreg(state, 0x3c) | 0x03);
+		break;
+
+	case SEC_VOLTAGE_OFF:
+		s5h1420_writereg(state, 0x3c, s5h1420_readreg(state, 0x3c) & 0xfd);
+		break;
+	}
+
+	dprintk("leave %s\n", __func__);
+	return 0;
+}
+
+static int s5h1420_set_tone(struct dvb_frontend *fe,
+			    enum fe_sec_tone_mode tone)
+{
+	struct s5h1420_state* state = fe->demodulator_priv;
+
+	dprintk("enter %s\n", __func__);
+	switch(tone) {
+	case SEC_TONE_ON:
+		s5h1420_writereg(state, 0x3b,
+				 (s5h1420_readreg(state, 0x3b) & 0x74) | 0x08);
+		break;
+
+	case SEC_TONE_OFF:
+		s5h1420_writereg(state, 0x3b,
+				 (s5h1420_readreg(state, 0x3b) & 0x74) | 0x01);
+		break;
+	}
+	dprintk("leave %s\n", __func__);
+
+	return 0;
+}
+
+static int s5h1420_send_master_cmd (struct dvb_frontend* fe,
+				    struct dvb_diseqc_master_cmd* cmd)
+{
+	struct s5h1420_state* state = fe->demodulator_priv;
+	u8 val;
+	int i;
+	unsigned long timeout;
+	int result = 0;
+
+	dprintk("enter %s\n", __func__);
+	if (cmd->msg_len > sizeof(cmd->msg))
+		return -EINVAL;
+
+	/* setup for DISEQC */
+	val = s5h1420_readreg(state, 0x3b);
+	s5h1420_writereg(state, 0x3b, 0x02);
+	msleep(15);
+
+	/* write the DISEQC command bytes */
+	for(i=0; i< cmd->msg_len; i++) {
+		s5h1420_writereg(state, 0x3d + i, cmd->msg[i]);
+	}
+
+	/* kick off transmission */
+	s5h1420_writereg(state, 0x3b, s5h1420_readreg(state, 0x3b) |
+				      ((cmd->msg_len-1) << 4) | 0x08);
+
+	/* wait for transmission to complete */
+	timeout = jiffies + ((100*HZ) / 1000);
+	while(time_before(jiffies, timeout)) {
+		if (!(s5h1420_readreg(state, 0x3b) & 0x08))
+			break;
+
+		msleep(5);
+	}
+	if (time_after(jiffies, timeout))
+		result = -ETIMEDOUT;
+
+	/* restore original settings */
+	s5h1420_writereg(state, 0x3b, val);
+	msleep(15);
+	dprintk("leave %s\n", __func__);
+	return result;
+}
+
+static int s5h1420_recv_slave_reply (struct dvb_frontend* fe,
+				     struct dvb_diseqc_slave_reply* reply)
+{
+	struct s5h1420_state* state = fe->demodulator_priv;
+	u8 val;
+	int i;
+	int length;
+	unsigned long timeout;
+	int result = 0;
+
+	/* setup for DISEQC receive */
+	val = s5h1420_readreg(state, 0x3b);
+	s5h1420_writereg(state, 0x3b, 0x82); /* FIXME: guess - do we need to set DIS_RDY(0x08) in receive mode? */
+	msleep(15);
+
+	/* wait for reception to complete */
+	timeout = jiffies + ((reply->timeout*HZ) / 1000);
+	while(time_before(jiffies, timeout)) {
+		if (!(s5h1420_readreg(state, 0x3b) & 0x80)) /* FIXME: do we test DIS_RDY(0x08) or RCV_EN(0x80)? */
+			break;
+
+		msleep(5);
+	}
+	if (time_after(jiffies, timeout)) {
+		result = -ETIMEDOUT;
+		goto exit;
+	}
+
+	/* check error flag - FIXME: not sure what this does - docs do not describe
+	 * beyond "error flag for diseqc receive data :( */
+	if (s5h1420_readreg(state, 0x49)) {
+		result = -EIO;
+		goto exit;
+	}
+
+	/* check length */
+	length = (s5h1420_readreg(state, 0x3b) & 0x70) >> 4;
+	if (length > sizeof(reply->msg)) {
+		result = -EOVERFLOW;
+		goto exit;
+	}
+	reply->msg_len = length;
+
+	/* extract data */
+	for(i=0; i< length; i++) {
+		reply->msg[i] = s5h1420_readreg(state, 0x3d + i);
+	}
+
+exit:
+	/* restore original settings */
+	s5h1420_writereg(state, 0x3b, val);
+	msleep(15);
+	return result;
+}
+
+static int s5h1420_send_burst(struct dvb_frontend *fe,
+			      enum fe_sec_mini_cmd minicmd)
+{
+	struct s5h1420_state* state = fe->demodulator_priv;
+	u8 val;
+	int result = 0;
+	unsigned long timeout;
+
+	/* setup for tone burst */
+	val = s5h1420_readreg(state, 0x3b);
+	s5h1420_writereg(state, 0x3b, (s5h1420_readreg(state, 0x3b) & 0x70) | 0x01);
+
+	/* set value for B position if requested */
+	if (minicmd == SEC_MINI_B) {
+		s5h1420_writereg(state, 0x3b, s5h1420_readreg(state, 0x3b) | 0x04);
+	}
+	msleep(15);
+
+	/* start transmission */
+	s5h1420_writereg(state, 0x3b, s5h1420_readreg(state, 0x3b) | 0x08);
+
+	/* wait for transmission to complete */
+	timeout = jiffies + ((100*HZ) / 1000);
+	while(time_before(jiffies, timeout)) {
+		if (!(s5h1420_readreg(state, 0x3b) & 0x08))
+			break;
+
+		msleep(5);
+	}
+	if (time_after(jiffies, timeout))
+		result = -ETIMEDOUT;
+
+	/* restore original settings */
+	s5h1420_writereg(state, 0x3b, val);
+	msleep(15);
+	return result;
+}
+
+static enum fe_status s5h1420_get_status_bits(struct s5h1420_state *state)
+{
+	u8 val;
+	enum fe_status status = 0;
+
+	val = s5h1420_readreg(state, 0x14);
+	if (val & 0x02)
+		status |=  FE_HAS_SIGNAL;
+	if (val & 0x01)
+		status |=  FE_HAS_CARRIER;
+	val = s5h1420_readreg(state, 0x36);
+	if (val & 0x01)
+		status |=  FE_HAS_VITERBI;
+	if (val & 0x20)
+		status |=  FE_HAS_SYNC;
+	if (status == (FE_HAS_SIGNAL|FE_HAS_CARRIER|FE_HAS_VITERBI|FE_HAS_SYNC))
+		status |=  FE_HAS_LOCK;
+
+	return status;
+}
+
+static int s5h1420_read_status(struct dvb_frontend *fe,
+			       enum fe_status *status)
+{
+	struct s5h1420_state* state = fe->demodulator_priv;
+	u8 val;
+
+	dprintk("enter %s\n", __func__);
+
+	if (status == NULL)
+		return -EINVAL;
+
+	/* determine lock state */
+	*status = s5h1420_get_status_bits(state);
+
+	/* 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, Vit10);
+		if ((val & 0x07) == 0x03) {
+			if (val & 0x08)
+				s5h1420_writereg(state, Vit09, 0x13);
+			else
+				s5h1420_writereg(state, Vit09, 0x1b);
+
+			/* wait a bit then update lock status */
+			mdelay(200);
+			*status = s5h1420_get_status_bits(state);
+		}
+	}
+
+	/* perform post lock setup */
+	if ((*status & FE_HAS_LOCK) && !state->postlocked) {
+
+		/* calculate the data rate */
+		u32 tmp = s5h1420_getsymbolrate(state);
+		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(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 < 2)
+			val = 0x00;
+		else if (tmp < 5)
+			val = 0x01;
+		else if (tmp < 9)
+			val = 0x02;
+		else if (tmp < 13)
+			val = 0x03;
+		else if (tmp < 17)
+			val = 0x04;
+		else if (tmp < 25)
+			val = 0x05;
+		else if (tmp < 33)
+			val = 0x06;
+		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));
+
+		/* kicker disable */
+		val = s5h1420_readreg(state, QPSK01) & 0x7f;
+		s5h1420_writereg(state, QPSK01, val);
+
+		/* 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;
+}
+
+static int s5h1420_read_ber(struct dvb_frontend* fe, u32* ber)
+{
+	struct s5h1420_state* state = fe->demodulator_priv;
+
+	s5h1420_writereg(state, 0x46, 0x1d);
+	mdelay(25);
+
+	*ber = (s5h1420_readreg(state, 0x48) << 8) | s5h1420_readreg(state, 0x47);
+
+	return 0;
+}
+
+static int s5h1420_read_signal_strength(struct dvb_frontend* fe, u16* strength)
+{
+	struct s5h1420_state* state = fe->demodulator_priv;
+
+	u8 val = s5h1420_readreg(state, 0x15);
+
+	*strength =  (u16) ((val << 8) | val);
+
+	return 0;
+}
+
+static int s5h1420_read_ucblocks(struct dvb_frontend* fe, u32* ucblocks)
+{
+	struct s5h1420_state* state = fe->demodulator_priv;
+
+	s5h1420_writereg(state, 0x46, 0x1f);
+	mdelay(25);
+
+	*ucblocks = (s5h1420_readreg(state, 0x48) << 8) | s5h1420_readreg(state, 0x47);
+
+	return 0;
+}
+
+static void s5h1420_reset(struct s5h1420_state* state)
+{
+	dprintk("%s\n", __func__);
+	s5h1420_writereg (state, 0x01, 0x08);
+	s5h1420_writereg (state, 0x01, 0x00);
+	udelay(10);
+}
+
+static void s5h1420_setsymbolrate(struct s5h1420_state* state,
+				  struct dtv_frontend_properties *p)
+{
+	u8 v;
+	u64 val;
+
+	dprintk("enter %s\n", __func__);
+
+	val = ((u64) p->symbol_rate / 1000ULL) * (1ULL<<24);
+	if (p->symbol_rate < 29000000)
+		val *= 2;
+	do_div(val, (state->fclk / 1000));
+
+	dprintk("symbol rate register: %06llx\n", (unsigned long long)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)
+{
+	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));
+
+	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)
+{
+	int val;
+
+	s5h1420_writereg(state, 0x06, s5h1420_readreg(state, 0x06) | 0x08);
+	val  = s5h1420_readreg(state, 0x0e) << 16;
+	val |= s5h1420_readreg(state, 0x0f) << 8;
+	val |= s5h1420_readreg(state, 0x10);
+	s5h1420_writereg(state, 0x06, s5h1420_readreg(state, 0x06) & 0xf7);
+
+	if (val & 0x800000)
+		val |= 0xff000000;
+
+	/* remember freqoffset is in kHz, but the chip wants the offset in Hz, so
+	 * divide fclk by 1000000 to get the correct value. */
+	val = (((-val) * (state->fclk/1000000)) / (1<<24));
+
+	return val;
+}
+
+static void s5h1420_setfec_inversion(struct s5h1420_state* state,
+				     struct dtv_frontend_properties *p)
+{
+	u8 inversion = 0;
+	u8 vit08, vit09;
+
+	dprintk("enter %s\n", __func__);
+
+	if (p->inversion == INVERSION_OFF)
+		inversion = state->config->invert ? 0x08 : 0;
+	else if (p->inversion == INVERSION_ON)
+		inversion = state->config->invert ? 0 : 0x08;
+
+	if ((p->fec_inner == FEC_AUTO) || (p->inversion == INVERSION_AUTO)) {
+		vit08 = 0x3f;
+		vit09 = 0;
+	} else {
+		switch (p->fec_inner) {
+		case FEC_1_2:
+			vit08 = 0x01;
+			vit09 = 0x10;
+			break;
+
+		case FEC_2_3:
+			vit08 = 0x02;
+			vit09 = 0x11;
+			break;
+
+		case FEC_3_4:
+			vit08 = 0x04;
+			vit09 = 0x12;
+			break;
+
+		case FEC_5_6:
+			vit08 = 0x08;
+			vit09 = 0x13;
+			break;
+
+		case FEC_6_7:
+			vit08 = 0x10;
+			vit09 = 0x14;
+			break;
+
+		case FEC_7_8:
+			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 enum fe_code_rate s5h1420_getfec(struct s5h1420_state *state)
+{
+	switch(s5h1420_readreg(state, 0x32) & 0x07) {
+	case 0:
+		return FEC_1_2;
+
+	case 1:
+		return FEC_2_3;
+
+	case 2:
+		return FEC_3_4;
+
+	case 3:
+		return FEC_5_6;
+
+	case 4:
+		return FEC_6_7;
+
+	case 5:
+		return FEC_7_8;
+	}
+
+	return FEC_NONE;
+}
+
+static enum fe_spectral_inversion
+s5h1420_getinversion(struct s5h1420_state *state)
+{
+	if (s5h1420_readreg(state, 0x32) & 0x08)
+		return INVERSION_ON;
+
+	return INVERSION_OFF;
+}
+
+static int s5h1420_set_frontend(struct dvb_frontend *fe)
+{
+	struct dtv_frontend_properties *p = &fe->dtv_property_cache;
+	struct s5h1420_state* state = fe->demodulator_priv;
+	int frequency_delta;
+	struct dvb_frontend_tune_settings fesettings;
+
+	dprintk("enter %s\n", __func__);
+
+	/* check if we should do a fast-tune */
+	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->fec_inner) &&
+			(state->symbol_rate == p->symbol_rate)) {
+
+		if (fe->ops.tuner_ops.set_params) {
+			fe->ops.tuner_ops.set_params(fe);
+			if (fe->ops.i2c_gate_ctrl) fe->ops.i2c_gate_ctrl(fe, 0);
+		}
+		if (fe->ops.tuner_ops.get_frequency) {
+			u32 tmp;
+			fe->ops.tuner_ops.get_frequency(fe, &tmp);
+			if (fe->ops.i2c_gate_ctrl) fe->ops.i2c_gate_ctrl(fe, 0);
+			s5h1420_setfreqoffset(state, p->frequency - tmp);
+		} 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->symbol_rate > 33000000)
+		state->fclk = 80000000;
+	else if (p->symbol_rate > 28500000)
+		state->fclk = 59000000;
+	else if (p->symbol_rate > 25000000)
+		state->fclk = 86000000;
+	else if (p->symbol_rate > 1900000)
+		state->fclk = 88000000;
+	else
+		state->fclk = 44000000;
+
+	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));
+
+	/* TODO DC offset removal, config parameter ? */
+	if (p->symbol_rate > 29000000)
+		s5h1420_writereg(state, QPSK01, 0xae | 0x10);
+	else
+		s5h1420_writereg(state, QPSK01, 0xac | 0x10);
+
+	/* 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->symbol_rate > 20000000)
+		s5h1420_writereg(state, Loop04, 0x79);
+	else
+		s5h1420_writereg(state, Loop04, 0x58);
+	s5h1420_writereg(state, Loop05, 0x6b);
+
+	if (p->symbol_rate >= 8000000)
+		s5h1420_writereg(state, Post01, (0 << 6) | 0x10);
+	else if (p->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);
+		if (fe->ops.i2c_gate_ctrl)
+			fe->ops.i2c_gate_ctrl(fe, 0);
+		s5h1420_setfreqoffset(state, 0);
+	}
+
+	/* set the reset of the parameters */
+	s5h1420_setsymbolrate(state, p);
+	s5h1420_setfec_inversion(state, p);
+
+	/* start QPSK */
+	s5h1420_writereg(state, QPSK01, s5h1420_readreg(state, QPSK01) | 1);
+
+	state->fec_inner = p->fec_inner;
+	state->symbol_rate = p->symbol_rate;
+	state->postlocked = 0;
+	state->tunedfreq = p->frequency;
+
+	dprintk("leave %s\n", __func__);
+	return 0;
+}
+
+static int s5h1420_get_frontend(struct dvb_frontend* fe,
+				struct dtv_frontend_properties *p)
+{
+	struct s5h1420_state* state = fe->demodulator_priv;
+
+	p->frequency = state->tunedfreq + s5h1420_getfreqoffset(state);
+	p->inversion = s5h1420_getinversion(state);
+	p->symbol_rate = s5h1420_getsymbolrate(state);
+	p->fec_inner = s5h1420_getfec(state);
+
+	return 0;
+}
+
+static int s5h1420_get_tune_settings(struct dvb_frontend* fe,
+				     struct dvb_frontend_tune_settings* fesettings)
+{
+	struct dtv_frontend_properties *p = &fe->dtv_property_cache;
+	if (p->symbol_rate > 20000000) {
+		fesettings->min_delay_ms = 50;
+		fesettings->step_size = 2000;
+		fesettings->max_drift = 8000;
+	} else if (p->symbol_rate > 12000000) {
+		fesettings->min_delay_ms = 100;
+		fesettings->step_size = 1500;
+		fesettings->max_drift = 9000;
+	} else if (p->symbol_rate > 8000000) {
+		fesettings->min_delay_ms = 100;
+		fesettings->step_size = 1000;
+		fesettings->max_drift = 8000;
+	} else if (p->symbol_rate > 4000000) {
+		fesettings->min_delay_ms = 100;
+		fesettings->step_size = 500;
+		fesettings->max_drift = 7000;
+	} else if (p->symbol_rate > 2000000) {
+		fesettings->min_delay_ms = 200;
+		fesettings->step_size = (p->symbol_rate / 8000);
+		fesettings->max_drift = 14 * fesettings->step_size;
+	} else {
+		fesettings->min_delay_ms = 200;
+		fesettings->step_size = (p->symbol_rate / 8000);
+		fesettings->max_drift = 18 * fesettings->step_size;
+	}
+
+	return 0;
+}
+
+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, state->CON_1_val | 1);
+	else
+		return s5h1420_writereg(state, 0x02, state->CON_1_val & 0xfe);
+}
+
+static int s5h1420_init (struct dvb_frontend* fe)
+{
+	struct s5h1420_state* state = fe->demodulator_priv;
+
+	/* disable power down and do reset */
+	state->CON_1_val = state->config->serial_mpeg << 4;
+	s5h1420_writereg(state, 0x02, state->CON_1_val);
+	msleep(10);
+	s5h1420_reset(state);
+
+	return 0;
+}
+
+static int s5h1420_sleep(struct dvb_frontend* fe)
+{
+	struct s5h1420_state* state = fe->demodulator_priv;
+	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 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[3];
+	u8 tx_open[2] = { CON_1, state->CON_1_val | 1 }; /* repeater stops once there was a stop condition */
+
+	if (1 + num > ARRAY_SIZE(m)) {
+		printk(KERN_WARNING
+		       "%s: i2c xfer: num=%d is too big!\n",
+		       KBUILD_MODNAME, num);
+		return  -EOPNOTSUPP;
+	}
+
+	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;
+
+	memcpy(&m[1], msg, sizeof(struct i2c_msg) * num);
+
+	return i2c_transfer(state->i2c, m, 1 + num) == 1 + num ? num : -EIO;
+}
+
+static const 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 = fe->demodulator_priv;
+	return &state->tuner_i2c_adapter;
+}
+EXPORT_SYMBOL(s5h1420_get_tuner_i2c_adapter);
+
+static const 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 */
+	struct s5h1420_state *state = kzalloc(sizeof(struct s5h1420_state), GFP_KERNEL);
+	u8 i;
+
+	if (state == NULL)
+		goto error;
+
+	/* setup the state */
+	state->config = config;
+	state->i2c = i2c;
+	state->postlocked = 0;
+	state->fclk = 88000000;
+	state->tunedfreq = 0;
+	state->fec_inner = FEC_NONE;
+	state->symbol_rate = 0;
+
+	/* check if the demod is there + identify it */
+	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 */
+	strscpy(state->tuner_i2c_adapter.name, "S5H1420-PN1010 tuner I2C bus",
+		sizeof(state->tuner_i2c_adapter.name));
+	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_GPL(s5h1420_attach);
+
+static const struct dvb_frontend_ops s5h1420_ops = {
+	.delsys = { SYS_DVBS },
+	.info = {
+		.name     = "Samsung S5H1420/PnpNetwork PN1010 DVB-S",
+		.frequency_min_hz    =  950 * MHz,
+		.frequency_max_hz    = 2150 * MHz,
+		.frequency_stepsize_hz = 125 * kHz,
+		.frequency_tolerance_hz  = 29500 * kHz,
+		.symbol_rate_min  = 1000000,
+		.symbol_rate_max  = 45000000,
+		/*  .symbol_rate_tolerance  = ???,*/
+		.caps = FE_CAN_INVERSION_AUTO |
+		FE_CAN_FEC_1_2 | FE_CAN_FEC_2_3 | FE_CAN_FEC_3_4 |
+		FE_CAN_FEC_5_6 | FE_CAN_FEC_6_7 | FE_CAN_FEC_7_8 | FE_CAN_FEC_AUTO |
+		FE_CAN_QPSK
+	},
+
+	.release = s5h1420_release,
+
+	.init = s5h1420_init,
+	.sleep = s5h1420_sleep,
+	.i2c_gate_ctrl = s5h1420_i2c_gate_ctrl,
+
+	.set_frontend = s5h1420_set_frontend,
+	.get_frontend = s5h1420_get_frontend,
+	.get_tune_settings = s5h1420_get_tune_settings,
+
+	.read_status = s5h1420_read_status,
+	.read_ber = s5h1420_read_ber,
+	.read_signal_strength = s5h1420_read_signal_strength,
+	.read_ucblocks = s5h1420_read_ucblocks,
+
+	.diseqc_send_master_cmd = s5h1420_send_master_cmd,
+	.diseqc_recv_slave_reply = s5h1420_recv_slave_reply,
+	.diseqc_send_burst = s5h1420_send_burst,
+	.set_tone = s5h1420_set_tone,
+	.set_voltage = s5h1420_set_voltage,
+};
+
+MODULE_DESCRIPTION("Samsung S5H1420/PnpNetwork PN1010 DVB-S Demodulator driver");
+MODULE_AUTHOR("Andrew de Quincey, Patrick Boettcher");
+MODULE_LICENSE("GPL");