V4L/DVB (10803): Add core code for ST STV0900 dual demodulator.

Signed-off-by: Igor M. Liplianin <liplianin@netup.ru>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

1 files changed, 1946 insertions, 0 deletions

diff --git a/drivers/media/dvb/frontends/stv0900_core.c b/drivers/media/dvb/frontends/stv0900_core.c
new file mode 100644
index 0000000..ee20fbf
--- /dev/null
+++ b/drivers/media/dvb/frontends/stv0900_core.c
@@ -0,0 +1,1946 @@
+/*
+ * stv0900_core.c
+ *
+ * Driver for ST STV0900 satellite demodulator IC.
+ *
+ * Copyright (C) ST Microelectronics.
+ * Copyright (C) 2009 NetUP Inc.
+ * Copyright (C) 2009 Igor M. Liplianin <liplianin@netup.ru>
+ *
+ * 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>
+#include <linux/string.h>
+#include <linux/slab.h>
+#include <linux/i2c.h>
+
+#include "stv0900.h"
+#include "stv0900_reg.h"
+#include "stv0900_priv.h"
+#include "stv0900_init.h"
+
+int debug = 1;
+module_param(debug, int, 0644);
+
+/* internal params node */
+struct stv0900_inode {
+	/* pointer for internal params, one for each pair of demods */
+	struct stv0900_internal		*internal;
+	struct stv0900_inode		*next_inode;
+};
+
+/* first internal params */
+static struct stv0900_inode *stv0900_first_inode;
+
+/* find chip by i2c adapter and i2c address */
+static struct stv0900_inode *find_inode(struct i2c_adapter *i2c_adap,
+							u8 i2c_addr)
+{
+	struct stv0900_inode *temp_chip = stv0900_first_inode;
+
+	if (temp_chip != NULL) {
+		/*
+		 Search of the last stv0900 chip or
+		 find it by i2c adapter and i2c address */
+		while ((temp_chip != NULL) &&
+			((temp_chip->internal->i2c_adap != i2c_adap) ||
+			(temp_chip->internal->i2c_addr != i2c_addr))) {
+
+			temp_chip = temp_chip->next_inode;
+			dprintk(KERN_INFO "%s: store.adap %x\n", __func__,
+				(int)&(*temp_chip->internal->i2c_adap));
+			dprintk(KERN_INFO "%s: init.adap %x\n", __func__,
+				(int)&(*i2c_adap));
+		}
+		if (temp_chip != NULL) {/* find by i2c adapter & address */
+			dprintk(KERN_INFO "%s: store.adap %x\n", __func__,
+				(int)temp_chip->internal->i2c_adap);
+			dprintk(KERN_INFO "%s: init.adap %x\n", __func__,
+				(int)i2c_adap);
+		}
+	}
+
+	return temp_chip;
+}
+
+/* deallocating chip */
+static void remove_inode(struct stv0900_internal *internal)
+{
+	struct stv0900_inode *prev_node = stv0900_first_inode;
+	struct stv0900_inode *del_node = find_inode(internal->i2c_adap,
+						internal->i2c_addr);
+
+	if (del_node != NULL) {
+		if (del_node == stv0900_first_inode) {
+			stv0900_first_inode = del_node->next_inode;
+		} else {
+			while (prev_node->next_inode != del_node)
+				prev_node = prev_node->next_inode;
+
+			if (del_node->next_inode == NULL)
+				prev_node->next_inode = NULL;
+			else
+				prev_node->next_inode =
+					prev_node->next_inode->next_inode;
+		}
+
+		kfree(del_node);
+	}
+}
+
+/* allocating new chip */
+static struct stv0900_inode *append_internal(struct stv0900_internal *internal)
+{
+	struct stv0900_inode *new_node = stv0900_first_inode;
+
+	if (new_node == NULL) {
+		new_node = kmalloc(sizeof(struct stv0900_inode), GFP_KERNEL);
+		stv0900_first_inode = new_node;
+	} else {
+		while (new_node->next_inode != NULL)
+			new_node = new_node->next_inode;
+
+		new_node->next_inode = kmalloc(sizeof(struct stv0900_inode), GFP_KERNEL);
+		if (new_node->next_inode != NULL)
+			new_node = new_node->next_inode;
+		else
+			new_node = NULL;
+	}
+
+	if (new_node != NULL) {
+		new_node->internal = internal;
+		new_node->next_inode = NULL;
+	}
+
+	return new_node;
+}
+
+s32 ge2comp(s32 a, s32 width)
+{
+	if (width == 32)
+		return a;
+	else
+		return (a >= (1 << (width - 1))) ? (a - (1 << width)) : a;
+}
+
+void stv0900_write_reg(struct stv0900_internal *i_params, u16 reg_addr,
+								u8 reg_data)
+{
+	u8 data[3];
+	int ret;
+	struct i2c_msg i2cmsg = {
+		.addr  = i_params->i2c_addr,
+		.flags = 0,
+		.len   = 3,
+		.buf   = data,
+	};
+
+	data[0] = MSB(reg_addr);
+	data[1] = LSB(reg_addr);
+	data[2] = reg_data;
+
+	ret = i2c_transfer(i_params->i2c_adap, &i2cmsg, 1);
+	if (ret != 1)
+		dprintk(KERN_ERR "%s: i2c error %d\n", __func__, ret);
+}
+
+u8 stv0900_read_reg(struct stv0900_internal *i_params, u16 reg_addr)
+{
+	u8 data[2];
+	int ret;
+	struct i2c_msg i2cmsg = {
+		.addr  = i_params->i2c_addr,
+		.flags = 0,
+		.len   = 2,
+		.buf   = data,
+	};
+
+	data[0] = MSB(reg_addr);
+	data[1] = LSB(reg_addr);
+
+	ret = i2c_transfer(i_params->i2c_adap, &i2cmsg, 1);
+	if (ret != 1)
+		dprintk(KERN_ERR "%s: i2c error %d\n", __func__, ret);
+
+	i2cmsg.flags = I2C_M_RD;
+	i2cmsg.len = 1;
+	ret = i2c_transfer(i_params->i2c_adap, &i2cmsg, 1);
+	if (ret != 1)
+		dprintk(KERN_ERR "%s: i2c error %d\n", __func__, ret);
+
+	return data[0];
+}
+
+void extract_mask_pos(u32 label, u8 *mask, u8 *pos)
+{
+	u8 position = 0, i = 0;
+
+	(*mask) = label & 0xff;
+
+	while ((position == 0) && (i < 8)) {
+		position = ((*mask) >> i) & 0x01;
+		i++;
+	}
+
+	(*pos) = (i - 1);
+}
+
+void stv0900_write_bits(struct stv0900_internal *i_params, u32 label, u8 val)
+{
+	u8 reg, mask, pos;
+
+	reg = stv0900_read_reg(i_params, (label >> 16) & 0xffff);
+	extract_mask_pos(label, &mask, &pos);
+
+	val = mask & (val << pos);
+
+	reg = (reg & (~mask)) | val;
+	stv0900_write_reg(i_params, (label >> 16) & 0xffff, reg);
+
+}
+
+u8 stv0900_get_bits(struct stv0900_internal *i_params, u32 label)
+{
+	u8 val = 0xff;
+	u8 mask, pos;
+
+	extract_mask_pos(label, &mask, &pos);
+
+	val = stv0900_read_reg(i_params, label >> 16);
+	val = (val & mask) >> pos;
+
+	return val;
+}
+
+enum fe_stv0900_error stv0900_initialize(struct stv0900_internal *i_params)
+{
+	s32 i;
+	enum fe_stv0900_error error;
+
+	if (i_params != NULL) {
+		i_params->chip_id = stv0900_read_reg(i_params, R0900_MID);
+		if (i_params->errs == STV0900_NO_ERROR) {
+			/*Startup sequence*/
+			stv0900_write_reg(i_params, R0900_P1_DMDISTATE, 0x5c);
+			stv0900_write_reg(i_params, R0900_P2_DMDISTATE, 0x5c);
+			stv0900_write_reg(i_params, R0900_P1_TNRCFG, 0x6c);
+			stv0900_write_reg(i_params, R0900_P2_TNRCFG, 0x6f);
+			stv0900_write_reg(i_params, R0900_P1_I2CRPT, 0x24);
+			stv0900_write_reg(i_params, R0900_P2_I2CRPT, 0x24);
+			stv0900_write_reg(i_params, R0900_NCOARSE, 0x13);
+			msleep(3);
+			stv0900_write_reg(i_params, R0900_I2CCFG, 0x08);
+
+			switch (i_params->clkmode) {
+			case 0:
+			case 2:
+				stv0900_write_reg(i_params, R0900_SYNTCTRL, 0x20
+						| i_params->clkmode);
+				break;
+			default:
+				/* preserve SELOSCI bit */
+				i = 0x02 & stv0900_read_reg(i_params, R0900_SYNTCTRL);
+				stv0900_write_reg(i_params, R0900_SYNTCTRL, 0x20 | i);
+				break;
+			}
+
+			msleep(3);
+			for (i = 0; i < 180; i++)
+				stv0900_write_reg(i_params, STV0900_InitVal[i][0], STV0900_InitVal[i][1]);
+
+			if (stv0900_read_reg(i_params, R0900_MID) >= 0x20) {
+				stv0900_write_reg(i_params, R0900_TSGENERAL, 0x0c);
+				for (i = 0; i < 32; i++)
+					stv0900_write_reg(i_params, STV0900_Cut20_AddOnVal[i][0], STV0900_Cut20_AddOnVal[i][1]);
+			}
+
+			stv0900_write_reg(i_params, R0900_P1_FSPYCFG, 0x6c);
+			stv0900_write_reg(i_params, R0900_P2_FSPYCFG, 0x6c);
+			stv0900_write_reg(i_params, R0900_TSTRES0, 0x80);
+			stv0900_write_reg(i_params, R0900_TSTRES0, 0x00);
+		}
+		error = i_params->errs;
+	} else
+		error = STV0900_INVALID_HANDLE;
+
+	return error;
+
+}
+
+u32 stv0900_get_mclk_freq(struct stv0900_internal *i_params, u32 ext_clk)
+{
+	u32 mclk = 90000000, div = 0, ad_div = 0;
+
+	div = stv0900_get_bits(i_params, F0900_M_DIV);
+	ad_div = ((stv0900_get_bits(i_params, F0900_SELX1RATIO) == 1) ? 4 : 6);
+
+	mclk = (div + 1) * ext_clk / ad_div;
+
+	dprintk(KERN_INFO "%s: Calculated Mclk = %d\n", __func__, mclk);
+
+	return mclk;
+}
+
+enum fe_stv0900_error stv0900_set_mclk(struct stv0900_internal *i_params, u32 mclk)
+{
+	enum fe_stv0900_error error = STV0900_NO_ERROR;
+	u32 m_div, clk_sel;
+
+	dprintk(KERN_INFO "%s: Mclk set to %d, Quartz = %d\n", __func__, mclk,
+			i_params->quartz);
+
+	if (i_params == NULL)
+		error = STV0900_INVALID_HANDLE;
+	else {
+		if (i_params->errs)
+			error = STV0900_I2C_ERROR;
+		else {
+			clk_sel = ((stv0900_get_bits(i_params, F0900_SELX1RATIO) == 1) ? 4 : 6);
+			m_div = ((clk_sel * mclk) / i_params->quartz) - 1;
+			stv0900_write_bits(i_params, F0900_M_DIV, m_div);
+			i_params->mclk = stv0900_get_mclk_freq(i_params,
+							i_params->quartz);
+
+			/*Set the DiseqC frequency to 22KHz */
+			/*
+				Formula:
+				DiseqC_TX_Freq= MasterClock/(32*F22TX_Reg)
+				DiseqC_RX_Freq= MasterClock/(32*F22RX_Reg)
+			*/
+			m_div = i_params->mclk / 704000;
+			stv0900_write_reg(i_params, R0900_P1_F22TX, m_div);
+			stv0900_write_reg(i_params, R0900_P1_F22RX, m_div);
+
+			stv0900_write_reg(i_params, R0900_P2_F22TX, m_div);
+			stv0900_write_reg(i_params, R0900_P2_F22RX, m_div);
+
+			if ((i_params->errs))
+				error = STV0900_I2C_ERROR;
+		}
+	}
+
+	return error;
+}
+
+u32 stv0900_get_err_count(struct stv0900_internal *i_params, int cntr,
+					enum fe_stv0900_demod_num demod)
+{
+	u32 lsb, msb, hsb, err_val;
+	s32 err1field_hsb, err1field_msb, err1field_lsb;
+	s32 err2field_hsb, err2field_msb, err2field_lsb;
+
+	dmd_reg(err1field_hsb, F0900_P1_ERR_CNT12, F0900_P2_ERR_CNT12);
+	dmd_reg(err1field_msb, F0900_P1_ERR_CNT11, F0900_P2_ERR_CNT11);
+	dmd_reg(err1field_lsb, F0900_P1_ERR_CNT10, F0900_P2_ERR_CNT10);
+
+	dmd_reg(err2field_hsb, F0900_P1_ERR_CNT22, F0900_P2_ERR_CNT22);
+	dmd_reg(err2field_msb, F0900_P1_ERR_CNT21, F0900_P2_ERR_CNT21);
+	dmd_reg(err2field_lsb, F0900_P1_ERR_CNT20, F0900_P2_ERR_CNT20);
+
+	switch (cntr) {
+	case 0:
+	default:
+		hsb = stv0900_get_bits(i_params, err1field_hsb);
+		msb = stv0900_get_bits(i_params, err1field_msb);
+		lsb = stv0900_get_bits(i_params, err1field_lsb);
+		break;
+	case 1:
+		hsb = stv0900_get_bits(i_params, err2field_hsb);
+		msb = stv0900_get_bits(i_params, err2field_msb);
+		lsb = stv0900_get_bits(i_params, err2field_lsb);
+		break;
+	}
+
+	err_val = (hsb << 16) + (msb << 8) + (lsb);
+
+	return err_val;
+}
+
+static int stv0900_i2c_gate_ctrl(struct dvb_frontend *fe, int enable)
+{
+	struct stv0900_state *state = fe->demodulator_priv;
+	struct stv0900_internal *i_params = state->internal;
+	enum fe_stv0900_demod_num demod = state->demod;
+
+	u32 fi2c;
+
+	dmd_reg(fi2c, F0900_P1_I2CT_ON, F0900_P2_I2CT_ON);
+	if (enable)
+		stv0900_write_bits(i_params, fi2c, 1);
+
+	return 0;
+}
+
+static void stv0900_set_ts_parallel_serial(struct stv0900_internal *i_params,
+					enum fe_stv0900_clock_type path1_ts,
+					enum fe_stv0900_clock_type path2_ts)
+{
+
+	dprintk(KERN_INFO "%s\n", __func__);
+
+	if (i_params->chip_id >= 0x20) {
+		switch (path1_ts) {
+		case STV0900_PARALLEL_PUNCT_CLOCK:
+		case STV0900_DVBCI_CLOCK:
+			switch (path2_ts) {
+			case STV0900_SERIAL_PUNCT_CLOCK:
+			case STV0900_SERIAL_CONT_CLOCK:
+			default:
+				stv0900_write_reg(i_params, R0900_TSGENERAL,
+							0x00);
+				break;
+			case STV0900_PARALLEL_PUNCT_CLOCK:
+			case STV0900_DVBCI_CLOCK:
+				stv0900_write_reg(i_params, R0900_TSGENERAL,
+							0x06);
+				stv0900_write_bits(i_params,
+						F0900_P1_TSFIFO_MANSPEED, 3);
+				stv0900_write_bits(i_params,
+						F0900_P2_TSFIFO_MANSPEED, 0);
+				stv0900_write_reg(i_params,
+						R0900_P1_TSSPEED, 0x14);
+				stv0900_write_reg(i_params,
+						R0900_P2_TSSPEED, 0x28);
+				break;
+			}
+			break;
+		case STV0900_SERIAL_PUNCT_CLOCK:
+		case STV0900_SERIAL_CONT_CLOCK:
+		default:
+			switch (path2_ts) {
+			case STV0900_SERIAL_PUNCT_CLOCK:
+			case STV0900_SERIAL_CONT_CLOCK:
+			default:
+				stv0900_write_reg(i_params,
+						R0900_TSGENERAL, 0x0C);
+				break;
+			case STV0900_PARALLEL_PUNCT_CLOCK:
+			case STV0900_DVBCI_CLOCK:
+				stv0900_write_reg(i_params,
+						R0900_TSGENERAL, 0x0A);
+				dprintk(KERN_INFO "%s: 0x0a\n", __func__);
+				break;
+			}
+			break;
+		}
+	} else {
+		switch (path1_ts) {
+		case STV0900_PARALLEL_PUNCT_CLOCK:
+		case STV0900_DVBCI_CLOCK:
+			switch (path2_ts) {
+			case STV0900_SERIAL_PUNCT_CLOCK:
+			case STV0900_SERIAL_CONT_CLOCK:
+			default:
+				stv0900_write_reg(i_params, R0900_TSGENERAL1X,
+							0x10);
+				break;
+			case STV0900_PARALLEL_PUNCT_CLOCK:
+			case STV0900_DVBCI_CLOCK:
+				stv0900_write_reg(i_params, R0900_TSGENERAL1X,
+							0x16);
+				stv0900_write_bits(i_params,
+						F0900_P1_TSFIFO_MANSPEED, 3);
+				stv0900_write_bits(i_params,
+						F0900_P2_TSFIFO_MANSPEED, 0);
+				stv0900_write_reg(i_params, R0900_P1_TSSPEED,
+							0x14);
+				stv0900_write_reg(i_params, R0900_P2_TSSPEED,
+							0x28);
+				break;
+			}
+
+			break;
+		case STV0900_SERIAL_PUNCT_CLOCK:
+		case STV0900_SERIAL_CONT_CLOCK:
+		default:
+			switch (path2_ts) {
+			case STV0900_SERIAL_PUNCT_CLOCK:
+			case STV0900_SERIAL_CONT_CLOCK:
+			default:
+				stv0900_write_reg(i_params, R0900_TSGENERAL1X,
+							0x14);
+				break;
+			case STV0900_PARALLEL_PUNCT_CLOCK:
+			case STV0900_DVBCI_CLOCK:
+				stv0900_write_reg(i_params, R0900_TSGENERAL1X,
+							0x12);
+				dprintk(KERN_INFO "%s: 0x12\n", __func__);
+				break;
+			}
+
+			break;
+		}
+	}
+
+	switch (path1_ts) {
+	case STV0900_PARALLEL_PUNCT_CLOCK:
+		stv0900_write_bits(i_params, F0900_P1_TSFIFO_SERIAL, 0x00);
+		stv0900_write_bits(i_params, F0900_P1_TSFIFO_DVBCI, 0x00);
+		break;
+	case STV0900_DVBCI_CLOCK:
+		stv0900_write_bits(i_params, F0900_P1_TSFIFO_SERIAL, 0x00);
+		stv0900_write_bits(i_params, F0900_P1_TSFIFO_DVBCI, 0x01);
+		break;
+	case STV0900_SERIAL_PUNCT_CLOCK:
+		stv0900_write_bits(i_params, F0900_P1_TSFIFO_SERIAL, 0x01);
+		stv0900_write_bits(i_params, F0900_P1_TSFIFO_DVBCI, 0x00);
+		break;
+	case STV0900_SERIAL_CONT_CLOCK:
+		stv0900_write_bits(i_params, F0900_P1_TSFIFO_SERIAL, 0x01);
+		stv0900_write_bits(i_params, F0900_P1_TSFIFO_DVBCI, 0x01);
+		break;
+	default:
+		break;
+	}
+
+	switch (path2_ts) {
+	case STV0900_PARALLEL_PUNCT_CLOCK:
+		stv0900_write_bits(i_params, F0900_P2_TSFIFO_SERIAL, 0x00);
+		stv0900_write_bits(i_params, F0900_P2_TSFIFO_DVBCI, 0x00);
+		break;
+	case STV0900_DVBCI_CLOCK:
+		stv0900_write_bits(i_params, F0900_P2_TSFIFO_SERIAL, 0x00);
+		stv0900_write_bits(i_params, F0900_P2_TSFIFO_DVBCI, 0x01);
+		break;
+	case STV0900_SERIAL_PUNCT_CLOCK:
+		stv0900_write_bits(i_params, F0900_P2_TSFIFO_SERIAL, 0x01);
+		stv0900_write_bits(i_params, F0900_P2_TSFIFO_DVBCI, 0x00);
+		break;
+	case STV0900_SERIAL_CONT_CLOCK:
+		stv0900_write_bits(i_params, F0900_P2_TSFIFO_SERIAL, 0x01);
+		stv0900_write_bits(i_params, F0900_P2_TSFIFO_DVBCI, 0x01);
+		break;
+	default:
+		break;
+	}
+
+	stv0900_write_bits(i_params, F0900_P2_RST_HWARE, 1);
+	stv0900_write_bits(i_params, F0900_P2_RST_HWARE, 0);
+	stv0900_write_bits(i_params, F0900_P1_RST_HWARE, 1);
+	stv0900_write_bits(i_params, F0900_P1_RST_HWARE, 0);
+}
+
+void stv0900_set_tuner(struct dvb_frontend *fe, u32 frequency,
+							u32 bandwidth)
+{
+	struct dvb_frontend_ops *frontend_ops = NULL;
+	struct dvb_tuner_ops *tuner_ops = NULL;
+
+	if (&fe->ops)
+		frontend_ops = &fe->ops;
+
+	if (&frontend_ops->tuner_ops)
+		tuner_ops = &frontend_ops->tuner_ops;
+
+	if (tuner_ops->set_frequency) {
+		if ((tuner_ops->set_frequency(fe, frequency)) < 0)
+			dprintk("%s: Invalid parameter\n", __func__);
+		else
+			dprintk("%s: Frequency=%d\n", __func__, frequency);
+
+	}
+
+	if (tuner_ops->set_bandwidth) {
+		if ((tuner_ops->set_bandwidth(fe, bandwidth)) < 0)
+			dprintk("%s: Invalid parameter\n", __func__);
+		else
+			dprintk("%s: Bandwidth=%d\n", __func__, bandwidth);
+
+	}
+}
+
+void stv0900_set_bandwidth(struct dvb_frontend *fe, u32 bandwidth)
+{
+	struct dvb_frontend_ops *frontend_ops = NULL;
+	struct dvb_tuner_ops *tuner_ops = NULL;
+
+	if (&fe->ops)
+		frontend_ops = &fe->ops;
+
+	if (&frontend_ops->tuner_ops)
+		tuner_ops = &frontend_ops->tuner_ops;
+
+	if (tuner_ops->set_bandwidth) {
+		if ((tuner_ops->set_bandwidth(fe, bandwidth)) < 0)
+			dprintk("%s: Invalid parameter\n", __func__);
+		else
+			dprintk("%s: Bandwidth=%d\n", __func__, bandwidth);
+
+	}
+}
+
+static s32 stv0900_get_rf_level(struct stv0900_internal *i_params,
+				const struct stv0900_table *lookup,
+				enum fe_stv0900_demod_num demod)
+{
+	s32 agc_gain = 0,
+		imin,
+		imax,
+		i,
+		rf_lvl = 0;
+
+	dprintk(KERN_INFO "%s\n", __func__);
+
+	if ((lookup != NULL) && lookup->size) {
+		switch (demod) {
+		case STV0900_DEMOD_1:
+		default:
+			agc_gain = MAKEWORD(stv0900_get_bits(i_params, F0900_P1_AGCIQ_VALUE1),
+						stv0900_get_bits(i_params, F0900_P1_AGCIQ_VALUE0));
+			break;
+		case STV0900_DEMOD_2:
+			agc_gain = MAKEWORD(stv0900_get_bits(i_params, F0900_P2_AGCIQ_VALUE1),
+						stv0900_get_bits(i_params, F0900_P2_AGCIQ_VALUE0));
+			break;
+		}
+
+		imin = 0;
+		imax = lookup->size - 1;
+		if (INRANGE(lookup->table[imin].regval, agc_gain, lookup->table[imax].regval)) {
+			while ((imax - imin) > 1) {
+				i = (imax + imin) >> 1;
+
+				if (INRANGE(lookup->table[imin].regval, agc_gain, lookup->table[i].regval))
+					imax = i;
+				else
+					imin = i;
+			}
+
+			rf_lvl = (((s32)agc_gain - lookup->table[imin].regval)
+					* (lookup->table[imax].realval - lookup->table[imin].realval)
+					/ (lookup->table[imax].regval - lookup->table[imin].regval))
+					+ lookup->table[imin].realval;
+		} else if (agc_gain > lookup->table[0].regval)
+			rf_lvl = 5;
+		else if (agc_gain < lookup->table[lookup->size-1].regval)
+			rf_lvl = -100;
+
+	}
+
+	dprintk(KERN_INFO "%s: RFLevel = %d\n", __func__, rf_lvl);
+
+	return rf_lvl;
+}
+
+static int stv0900_read_signal_strength(struct dvb_frontend *fe, u16 *strength)
+{
+	struct stv0900_state *state = fe->demodulator_priv;
+	struct stv0900_internal *internal = state->internal;
+	s32 rflevel = stv0900_get_rf_level(internal, &stv0900_rf,
+								state->demod);
+
+	*strength = (rflevel + 100) * (16383 / 105);
+
+	return 0;
+}
+
+
+static s32 stv0900_carr_get_quality(struct dvb_frontend *fe,
+					const struct stv0900_table *lookup)
+{
+	struct stv0900_state *state = fe->demodulator_priv;
+	struct stv0900_internal *i_params = state->internal;
+	enum fe_stv0900_demod_num demod = state->demod;
+
+	s32 c_n = -100,
+		regval, imin, imax,
+		i,
+		lock_flag_field,
+		noise_field1,
+		noise_field0;
+
+	dprintk(KERN_INFO "%s\n", __func__);
+
+	dmd_reg(lock_flag_field, F0900_P1_LOCK_DEFINITIF, F0900_P2_LOCK_DEFINITIF);
+	if (stv0900_get_standard(fe, demod) == STV0900_DVBS2_STANDARD) {
+		dmd_reg(noise_field1, F0900_P1_NOSPLHT_NORMED1, F0900_P2_NOSPLHT_NORMED1);
+		dmd_reg(noise_field0, F0900_P1_NOSPLHT_NORMED0, F0900_P2_NOSPLHT_NORMED0);
+	} else {
+		dmd_reg(noise_field1, F0900_P1_NOSDATAT_NORMED1, F0900_P2_NOSDATAT_NORMED1);
+		dmd_reg(noise_field0, F0900_P1_NOSDATAT_NORMED0, F0900_P1_NOSDATAT_NORMED0);
+	}
+
+	if (stv0900_get_bits(i_params, lock_flag_field)) {
+		if ((lookup != NULL) && lookup->size) {
+			regval = 0;
+			msleep(5);
+			for (i = 0; i < 16; i++) {
+				regval += MAKEWORD(stv0900_get_bits(i_params, noise_field1),
+						stv0900_get_bits(i_params, noise_field0));
+				msleep(1);
+			}
+
+			regval /= 16;
+			imin = 0;
+			imax = lookup->size - 1;
+			if (INRANGE(lookup->table[imin].regval, regval, lookup->table[imax].regval)) {
+				while ((imax - imin) > 1) {
+					i = (imax + imin) >> 1;
+
+					if (INRANGE(lookup->table[imin].regval, regval, lookup->table[i].regval))
+						imax = i;
+					else
+						imin = i;
+				}
+
+				c_n = ((regval - lookup->table[imin].regval)
+						* (lookup->table[imax].realval - lookup->table[imin].realval)
+						/ (lookup->table[imax].regval - lookup->table[imin].regval))
+						+ lookup->table[imin].realval;
+			} else if (regval < lookup->table[imin].regval)
+				c_n = 1000;
+		}
+	}
+
+	return c_n;
+}
+
+static int stv0900_read_snr(struct dvb_frontend *fe, u16 *snr)
+{
+	*snr = (16383 / 1030) * (30 + stv0900_carr_get_quality(fe, (const struct stv0900_table *)&stv0900_s2_cn));
+
+	return 0;
+}
+
+static u32 stv0900_get_ber(struct stv0900_internal *i_params,
+				enum fe_stv0900_demod_num demod)
+{
+	u32 ber = 10000000, i;
+	s32 dmd_state_reg;
+	s32 demod_state;
+	s32 vstatus_reg;
+	s32 prvit_field;
+	s32 pdel_status_reg;
+	s32 pdel_lock_field;
+
+	dmd_reg(dmd_state_reg, F0900_P1_HEADER_MODE, F0900_P2_HEADER_MODE);
+	dmd_reg(vstatus_reg, R0900_P1_VSTATUSVIT, R0900_P2_VSTATUSVIT);
+	dmd_reg(prvit_field, F0900_P1_PRFVIT, F0900_P2_PRFVIT);
+	dmd_reg(pdel_status_reg, R0900_P1_PDELSTATUS1, R0900_P2_PDELSTATUS1);
+	dmd_reg(pdel_lock_field, F0900_P1_PKTDELIN_LOCK,
+				F0900_P2_PKTDELIN_LOCK);
+
+	demod_state = stv0900_get_bits(i_params, dmd_state_reg);
+
+	switch (demod_state) {
+	case STV0900_SEARCH:
+	case STV0900_PLH_DETECTED:
+	default:
+		ber = 10000000;
+		break;
+	case STV0900_DVBS_FOUND:
+		ber = 0;
+		for (i = 0; i < 5; i++) {
+			msleep(5);
+			ber += stv0900_get_err_count(i_params, 0, demod);
+		}
+
+		ber /= 5;
+		if (stv0900_get_bits(i_params, prvit_field)) {
+			ber *= 9766;
+			ber = ber >> 13;
+		}
+
+		break;
+	case STV0900_DVBS2_FOUND:
+		ber = 0;
+		for (i = 0; i < 5; i++) {
+			msleep(5);
+			ber += stv0900_get_err_count(i_params, 0, demod);
+		}
+
+		ber /= 5;
+		if (stv0900_get_bits(i_params, pdel_lock_field)) {
+			ber *= 9766;
+			ber = ber >> 13;
+		}
+
+		break;
+	}
+
+	return ber;
+}
+
+static int stv0900_read_ber(struct dvb_frontend *fe, u32 *ber)
+{
+	struct stv0900_state *state = fe->demodulator_priv;
+	struct stv0900_internal *internal = state->internal;
+
+	*ber = stv0900_get_ber(internal, state->demod);
+
+	return 0;
+}
+
+int stv0900_get_demod_lock(struct stv0900_internal *i_params,
+			enum fe_stv0900_demod_num demod, s32 time_out)
+{
+	s32 timer = 0,
+		lock = 0,
+		header_field,
+		lock_field;
+
+	enum fe_stv0900_search_state	dmd_state;
+
+	dmd_reg(header_field, F0900_P1_HEADER_MODE, F0900_P2_HEADER_MODE);
+	dmd_reg(lock_field, F0900_P1_LOCK_DEFINITIF, F0900_P2_LOCK_DEFINITIF);
+	while ((timer < time_out) && (lock == 0)) {
+		dmd_state = stv0900_get_bits(i_params, header_field);
+		dprintk("Demod State = %d\n", dmd_state);
+		switch (dmd_state) {
+		case STV0900_SEARCH:
+		case STV0900_PLH_DETECTED:
+		default:
+			lock = 0;
+			break;
+		case STV0900_DVBS2_FOUND:
+		case STV0900_DVBS_FOUND:
+			lock = stv0900_get_bits(i_params, lock_field);
+			break;
+		}
+
+		if (lock == 0)
+			msleep(10);
+
+		timer += 10;
+	}
+
+	if (lock)
+		dprintk("DEMOD LOCK OK\n");
+	else
+		dprintk("DEMOD LOCK FAIL\n");
+
+	return lock;
+}
+
+void stv0900_stop_all_s2_modcod(struct stv0900_internal *i_params,
+				enum fe_stv0900_demod_num demod)
+{
+	s32 regflist,
+	i;
+
+	dprintk(KERN_INFO "%s\n", __func__);
+
+	dmd_reg(regflist, R0900_P1_MODCODLST0, R0900_P2_MODCODLST0);
+
+	for (i = 0; i < 16; i++)
+		stv0900_write_reg(i_params, regflist + i, 0xff);
+}
+
+void stv0900_activate_s2_modcode(struct stv0900_internal *i_params,
+				enum fe_stv0900_demod_num demod)
+{
+	u32 matype,
+	mod_code,
+	fmod,
+	reg_index,
+	field_index;
+
+	dprintk(KERN_INFO "%s\n", __func__);
+
+	if (i_params->chip_id <= 0x11) {
+		msleep(5);
+
+		switch (demod) {
+		case STV0900_DEMOD_1:
+		default:
+			mod_code = stv0900_read_reg(i_params,
+							R0900_P1_PLHMODCOD);
+			matype = mod_code & 0x3;
+			mod_code = (mod_code & 0x7f) >> 2;
+
+			reg_index = R0900_P1_MODCODLSTF - mod_code / 2;
+			field_index = mod_code % 2;
+			break;
+		case STV0900_DEMOD_2:
+			mod_code = stv0900_read_reg(i_params,
+							R0900_P2_PLHMODCOD);
+			matype = mod_code & 0x3;
+			mod_code = (mod_code & 0x7f) >> 2;
+
+			reg_index = R0900_P2_MODCODLSTF - mod_code / 2;
+			field_index = mod_code % 2;
+			break;
+		}
+
+
+		switch (matype) {
+		case 0:
+		default:
+			fmod = 14;
+			break;
+		case 1:
+			fmod = 13;
+			break;
+		case 2:
+			fmod = 11;
+			break;
+		case 3:
+			fmod = 7;
+			break;
+		}
+
+		if ((INRANGE(STV0900_QPSK_12, mod_code, STV0900_8PSK_910))
+							&& (matype <= 1)) {
+			if (field_index == 0)
+				stv0900_write_reg(i_params, reg_index,
+							0xf0 | fmod);
+			else
+				stv0900_write_reg(i_params, reg_index,
+							(fmod << 4) | 0xf);
+		}
+	} else if (i_params->chip_id >= 0x12) {
+		switch (demod) {
+		case STV0900_DEMOD_1:
+		default:
+			for (reg_index = 0; reg_index < 7; reg_index++)
+				stv0900_write_reg(i_params, R0900_P1_MODCODLST0 + reg_index, 0xff);
+
+			stv0900_write_reg(i_params, R0900_P1_MODCODLSTE, 0xff);
+			stv0900_write_reg(i_params, R0900_P1_MODCODLSTF, 0xcf);
+			for (reg_index = 0; reg_index < 8; reg_index++)
+				stv0900_write_reg(i_params, R0900_P1_MODCODLST7 + reg_index, 0xcc);
+
+			break;
+		case STV0900_DEMOD_2:
+			for (reg_index = 0; reg_index < 7; reg_index++)
+				stv0900_write_reg(i_params, R0900_P2_MODCODLST0 + reg_index, 0xff);
+
+			stv0900_write_reg(i_params, R0900_P2_MODCODLSTE, 0xff);
+			stv0900_write_reg(i_params, R0900_P2_MODCODLSTF, 0xcf);
+			for (reg_index = 0; reg_index < 8; reg_index++)
+				stv0900_write_reg(i_params, R0900_P2_MODCODLST7 + reg_index, 0xcc);
+
+			break;
+		}
+
+	}
+}
+
+void stv0900_activate_s2_modcode_single(struct stv0900_internal *i_params,
+					enum fe_stv0900_demod_num demod)
+{
+	u32 reg_index;
+
+	dprintk(KERN_INFO "%s\n", __func__);
+
+	switch (demod) {
+	case STV0900_DEMOD_1:
+	default:
+		stv0900_write_reg(i_params, R0900_P1_MODCODLST0, 0xff);
+		stv0900_write_reg(i_params, R0900_P1_MODCODLST1, 0xf0);
+		stv0900_write_reg(i_params, R0900_P1_MODCODLSTF, 0x0f);
+		for (reg_index = 0; reg_index < 13; reg_index++)
+			stv0900_write_reg(i_params,
+					R0900_P1_MODCODLST2 + reg_index, 0);
+
+		break;
+	case STV0900_DEMOD_2:
+		stv0900_write_reg(i_params, R0900_P2_MODCODLST0, 0xff);
+		stv0900_write_reg(i_params, R0900_P2_MODCODLST1, 0xf0);
+		stv0900_write_reg(i_params, R0900_P2_MODCODLSTF, 0x0f);
+		for (reg_index = 0; reg_index < 13; reg_index++)
+			stv0900_write_reg(i_params,
+					R0900_P2_MODCODLST2 + reg_index, 0);
+
+		break;
+	}
+}
+
+static enum dvbfe_algo stv0900_frontend_algo(struct dvb_frontend *fe)
+{
+	return DVBFE_ALGO_CUSTOM;
+}
+
+static int stb0900_set_property(struct dvb_frontend *fe,
+				struct dtv_property *tvp)
+{
+	dprintk(KERN_INFO "%s(..)\n", __func__);
+
+	return 0;
+}
+
+static int stb0900_get_property(struct dvb_frontend *fe,
+				struct dtv_property *tvp)
+{
+	dprintk(KERN_INFO "%s(..)\n", __func__);
+
+	return 0;
+}
+
+void stv0900_start_search(struct stv0900_internal *i_params,
+				enum fe_stv0900_demod_num demod)
+{
+
+	switch (demod) {
+	case STV0900_DEMOD_1:
+	default:
+		stv0900_write_bits(i_params, F0900_P1_I2C_DEMOD_MODE, 0x1f);
+
+		if (i_params->chip_id == 0x10)
+			stv0900_write_reg(i_params, R0900_P1_CORRELEXP, 0xaa);
+
+		if (i_params->chip_id < 0x20)
+			stv0900_write_reg(i_params, R0900_P1_CARHDR, 0x55);
+
+		if (i_params->dmd1_symbol_rate <= 5000000) {
+			stv0900_write_reg(i_params, R0900_P1_CARCFG, 0x44);
+			stv0900_write_reg(i_params, R0900_P1_CFRUP1, 0x0f);
+			stv0900_write_reg(i_params, R0900_P1_CFRUP0, 0xff);
+			stv0900_write_reg(i_params, R0900_P1_CFRLOW1, 0xf0);
+			stv0900_write_reg(i_params, R0900_P1_CFRLOW0, 0x00);
+			stv0900_write_reg(i_params, R0900_P1_RTCS2, 0x68);
+		} else {
+			stv0900_write_reg(i_params, R0900_P1_CARCFG, 0xc4);
+			stv0900_write_reg(i_params, R0900_P1_RTCS2, 0x44);
+		}
+
+		stv0900_write_reg(i_params, R0900_P1_CFRINIT1, 0);
+		stv0900_write_reg(i_params, R0900_P1_CFRINIT0, 0);
+
+		if (i_params->chip_id >= 0x20) {
+			stv0900_write_reg(i_params, R0900_P1_EQUALCFG, 0x41);
+			stv0900_write_reg(i_params, R0900_P1_FFECFG, 0x41);
+
+			if ((i_params->dmd1_srch_standard == STV0900_SEARCH_DVBS1) || (i_params->dmd1_srch_standard == STV0900_SEARCH_DSS) || (i_params->dmd1_srch_standard == STV0900_AUTO_SEARCH)) {
+				stv0900_write_reg(i_params, R0900_P1_VITSCALE, 0x82);
+				stv0900_write_reg(i_params, R0900_P1_VAVSRVIT, 0x0);
+			}
+		}
+
+		stv0900_write_reg(i_params, R0900_P1_SFRSTEP, 0x00);
+		stv0900_write_reg(i_params, R0900_P1_TMGTHRISE, 0xe0);
+		stv0900_write_reg(i_params, R0900_P1_TMGTHFALL, 0xc0);
+		stv0900_write_bits(i_params, F0900_P1_SCAN_ENABLE, 0);
+		stv0900_write_bits(i_params, F0900_P1_CFR_AUTOSCAN, 0);
+		stv0900_write_bits(i_params, F0900_P1_S1S2_SEQUENTIAL, 0);
+		stv0900_write_reg(i_params, R0900_P1_RTC, 0x88);
+		if (i_params->chip_id >= 0x20) {
+			if (i_params->dmd1_symbol_rate < 2000000) {
+				stv0900_write_reg(i_params, R0900_P1_CARFREQ, 0x39);
+				stv0900_write_reg(i_params, R0900_P1_CARHDR, 0x40);
+			}
+
+			if (i_params->dmd1_symbol_rate < 10000000) {
+				stv0900_write_reg(i_params, R0900_P1_CARFREQ, 0x4c);
+				stv0900_write_reg(i_params, R0900_P1_CARHDR, 0x20);
+			} else {
+				stv0900_write_reg(i_params, R0900_P1_CARFREQ, 0x4b);
+				stv0900_write_reg(i_params, R0900_P1_CARHDR, 0x20);
+			}
+
+		} else {
+			if (i_params->dmd1_symbol_rate < 10000000)
+				stv0900_write_reg(i_params, R0900_P1_CARFREQ, 0xef);
+			else
+				stv0900_write_reg(i_params, R0900_P1_CARFREQ, 0xed);
+		}
+
+		switch (i_params->dmd1_srch_algo) {
+		case STV0900_WARM_START:
+			stv0900_write_reg(i_params, R0900_P1_DMDISTATE, 0x1f);
+			stv0900_write_reg(i_params, R0900_P1_DMDISTATE, 0x18);
+			break;
+		case STV0900_COLD_START:
+			stv0900_write_reg(i_params, R0900_P1_DMDISTATE, 0x1f);
+			stv0900_write_reg(i_params, R0900_P1_DMDISTATE, 0x15);
+			break;
+		default:
+			break;
+		}
+
+		break;
+	case STV0900_DEMOD_2:
+		stv0900_write_bits(i_params, F0900_P2_I2C_DEMOD_MODE, 0x1f);
+		if (i_params->chip_id == 0x10)
+			stv0900_write_reg(i_params, R0900_P2_CORRELEXP, 0xaa);
+
+		if (i_params->chip_id < 0x20)
+			stv0900_write_reg(i_params, R0900_P2_CARHDR, 0x55);
+
+		if (i_params->dmd2_symbol_rate <= 5000000) {
+			stv0900_write_reg(i_params, R0900_P2_CARCFG, 0x44);
+			stv0900_write_reg(i_params, R0900_P2_CFRUP1, 0x0f);
+			stv0900_write_reg(i_params, R0900_P2_CFRUP0, 0xff);
+			stv0900_write_reg(i_params, R0900_P2_CFRLOW1, 0xf0);
+			stv0900_write_reg(i_params, R0900_P2_CFRLOW0, 0x00);
+			stv0900_write_reg(i_params, R0900_P2_RTCS2, 0x68);
+		} else {
+			stv0900_write_reg(i_params, R0900_P2_CARCFG, 0xc4);
+			stv0900_write_reg(i_params, R0900_P2_RTCS2, 0x44);
+		}
+
+		stv0900_write_reg(i_params, R0900_P2_CFRINIT1, 0);
+		stv0900_write_reg(i_params, R0900_P2_CFRINIT0, 0);
+
+		if (i_params->chip_id >= 0x20) {
+			stv0900_write_reg(i_params, R0900_P2_EQUALCFG, 0x41);
+			stv0900_write_reg(i_params, R0900_P2_FFECFG, 0x41);
+			if ((i_params->dmd2_srch_stndrd == STV0900_SEARCH_DVBS1) || (i_params->dmd2_srch_stndrd == STV0900_SEARCH_DSS) || (i_params->dmd2_srch_stndrd == STV0900_AUTO_SEARCH)) {
+				stv0900_write_reg(i_params, R0900_P2_VITSCALE, 0x82);
+				stv0900_write_reg(i_params, R0900_P2_VAVSRVIT, 0x0);
+			}
+		}
+
+		stv0900_write_reg(i_params, R0900_P2_SFRSTEP, 0x00);
+		stv0900_write_reg(i_params, R0900_P2_TMGTHRISE, 0xe0);
+		stv0900_write_reg(i_params, R0900_P2_TMGTHFALL, 0xc0);
+		stv0900_write_bits(i_params, F0900_P2_SCAN_ENABLE, 0);
+		stv0900_write_bits(i_params, F0900_P2_CFR_AUTOSCAN, 0);
+		stv0900_write_bits(i_params, F0900_P2_S1S2_SEQUENTIAL, 0);
+		stv0900_write_reg(i_params, R0900_P2_RTC, 0x88);
+		if (i_params->chip_id >= 0x20) {
+			if (i_params->dmd2_symbol_rate < 2000000) {
+				stv0900_write_reg(i_params, R0900_P2_CARFREQ, 0x39);
+				stv0900_write_reg(i_params, R0900_P2_CARHDR, 0x40);
+			}
+
+			if (i_params->dmd2_symbol_rate < 10000000) {
+				stv0900_write_reg(i_params, R0900_P2_CARFREQ, 0x4c);
+				stv0900_write_reg(i_params, R0900_P2_CARHDR, 0x20);
+			} else {
+				stv0900_write_reg(i_params, R0900_P2_CARFREQ, 0x4b);
+				stv0900_write_reg(i_params, R0900_P2_CARHDR, 0x20);
+			}
+
+		} else {
+			if (i_params->dmd2_symbol_rate < 10000000)
+				stv0900_write_reg(i_params, R0900_P2_CARFREQ, 0xef);
+			else
+				stv0900_write_reg(i_params, R0900_P2_CARFREQ, 0xed);
+		}
+
+		switch (i_params->dmd2_srch_algo) {
+		case STV0900_WARM_START:
+			stv0900_write_reg(i_params, R0900_P2_DMDISTATE, 0x1f);
+			stv0900_write_reg(i_params, R0900_P2_DMDISTATE, 0x18);
+			break;
+		case STV0900_COLD_START:
+			stv0900_write_reg(i_params, R0900_P2_DMDISTATE, 0x1f);
+			stv0900_write_reg(i_params, R0900_P2_DMDISTATE, 0x15);
+			break;
+		default:
+			break;
+		}
+
+		break;
+	}
+}
+
+u8 stv0900_get_optim_carr_loop(s32 srate, enum fe_stv0900_modcode modcode,
+							s32 pilot, u8 chip_id)
+{
+	u8 aclc_value = 0x29;
+	s32	i;
+	const struct stv0900_car_loop_optim *car_loop_s2;
+
+	dprintk(KERN_INFO "%s\n", __func__);
+
+	if (chip_id <= 0x12)
+		car_loop_s2 = FE_STV0900_S2CarLoop;
+	else if (chip_id == 0x20)
+		car_loop_s2 = FE_STV0900_S2CarLoopCut20;
+	else
+		car_loop_s2 = FE_STV0900_S2CarLoop;
+
+	if (modcode < STV0900_QPSK_12) {
+		i = 0;
+		while ((i < 3) && (modcode != FE_STV0900_S2LowQPCarLoopCut20[i].modcode))
+			i++;
+
+		if (i >= 3)
+			i = 2;
+	} else {
+		i = 0;
+		while ((i < 14) && (modcode != car_loop_s2[i].modcode))
+			i++;
+
+		if (i >= 14) {
+			i = 0;
+			while ((i < 11) && (modcode != FE_STV0900_S2APSKCarLoopCut20[i].modcode))
+				i++;
+
+			if (i >= 11)
+				i = 10;
+		}
+	}
+
+	if (modcode <= STV0900_QPSK_25) {
+		if (pilot) {
+			if (srate <= 3000000)
+				aclc_value = FE_STV0900_S2LowQPCarLoopCut20[i].car_loop_pilots_on_2;
+			else if (srate <= 7000000)
+				aclc_value = FE_STV0900_S2LowQPCarLoopCut20[i].car_loop_pilots_on_5;
+			else if (srate <= 15000000)
+				aclc_value = FE_STV0900_S2LowQPCarLoopCut20[i].car_loop_pilots_on_10;
+			else if (srate <= 25000000)
+				aclc_value = FE_STV0900_S2LowQPCarLoopCut20[i].car_loop_pilots_on_20;
+			else
+				aclc_value = FE_STV0900_S2LowQPCarLoopCut20[i].car_loop_pilots_on_30;
+		} else {
+			if (srate <= 3000000)
+				aclc_value = FE_STV0900_S2LowQPCarLoopCut20[i].car_loop_pilots_off_2;
+			else if (srate <= 7000000)
+				aclc_value = FE_STV0900_S2LowQPCarLoopCut20[i].car_loop_pilots_off_5;
+			else if (srate <= 15000000)
+				aclc_value = FE_STV0900_S2LowQPCarLoopCut20[i].car_loop_pilots_off_10;
+			else if (srate <= 25000000)
+				aclc_value = FE_STV0900_S2LowQPCarLoopCut20[i].car_loop_pilots_off_20;
+			else
+				aclc_value = FE_STV0900_S2LowQPCarLoopCut20[i].car_loop_pilots_off_30;
+		}
+
+	} else if (modcode <= STV0900_8PSK_910) {
+		if (pilot) {
+			if (srate <= 3000000)
+				aclc_value = car_loop_s2[i].car_loop_pilots_on_2;
+			else if (srate <= 7000000)
+				aclc_value = car_loop_s2[i].car_loop_pilots_on_5;
+			else if (srate <= 15000000)
+				aclc_value = car_loop_s2[i].car_loop_pilots_on_10;
+			else if (srate <= 25000000)
+				aclc_value = car_loop_s2[i].car_loop_pilots_on_20;
+			else
+				aclc_value = car_loop_s2[i].car_loop_pilots_on_30;
+		} else {
+			if (srate <= 3000000)
+				aclc_value = car_loop_s2[i].car_loop_pilots_off_2;
+			else if (srate <= 7000000)
+				aclc_value = car_loop_s2[i].car_loop_pilots_off_5;
+			else if (srate <= 15000000)
+				aclc_value = car_loop_s2[i].car_loop_pilots_off_10;
+			else if (srate <= 25000000)
+				aclc_value = car_loop_s2[i].car_loop_pilots_off_20;
+			else
+				aclc_value = car_loop_s2[i].car_loop_pilots_off_30;
+		}
+
+	} else {
+		if (srate <= 3000000)
+			aclc_value = FE_STV0900_S2APSKCarLoopCut20[i].car_loop_pilots_on_2;
+		else if (srate <= 7000000)
+			aclc_value = FE_STV0900_S2APSKCarLoopCut20[i].car_loop_pilots_on_5;
+		else if (srate <= 15000000)
+			aclc_value = FE_STV0900_S2APSKCarLoopCut20[i].car_loop_pilots_on_10;
+		else if (srate <= 25000000)
+			aclc_value = FE_STV0900_S2APSKCarLoopCut20[i].car_loop_pilots_on_20;
+		else
+			aclc_value = FE_STV0900_S2APSKCarLoopCut20[i].car_loop_pilots_on_30;
+	}
+
+	return aclc_value;
+}
+
+u8 stv0900_get_optim_short_carr_loop(s32 srate, enum fe_stv0900_modulation modulation, u8 chip_id)
+{
+	s32 mod_index = 0;
+
+	u8 aclc_value = 0x0b;
+
+	dprintk(KERN_INFO "%s\n", __func__);
+
+	switch (modulation) {
+	case STV0900_QPSK:
+	default:
+		mod_index = 0;
+		break;
+	case STV0900_8PSK:
+		mod_index = 1;
+		break;
+	case STV0900_16APSK:
+		mod_index = 2;
+		break;
+	case STV0900_32APSK:
+		mod_index = 3;
+		break;
+	}
+
+	switch (chip_id) {
+	case 0x20:
+		if (srate <= 3000000)
+			aclc_value = FE_STV0900_S2ShortCarLoop[mod_index].car_loop_cut20_2;
+		else if (srate <= 7000000)
+			aclc_value = FE_STV0900_S2ShortCarLoop[mod_index].car_loop_cut20_5;
+		else if (srate <= 15000000)
+			aclc_value = FE_STV0900_S2ShortCarLoop[mod_index].car_loop_cut20_10;
+		else if (srate <= 25000000)
+			aclc_value = FE_STV0900_S2ShortCarLoop[mod_index].car_loop_cut20_20;
+		else
+			aclc_value = FE_STV0900_S2ShortCarLoop[mod_index].car_loop_cut20_30;
+
+		break;
+	case 0x12:
+	default:
+		if (srate <= 3000000)
+			aclc_value = FE_STV0900_S2ShortCarLoop[mod_index].car_loop_cut12_2;
+		else if (srate <= 7000000)
+			aclc_value = FE_STV0900_S2ShortCarLoop[mod_index].car_loop_cut12_5;
+		else if (srate <= 15000000)
+			aclc_value = FE_STV0900_S2ShortCarLoop[mod_index].car_loop_cut12_10;
+		else if (srate <= 25000000)
+			aclc_value = FE_STV0900_S2ShortCarLoop[mod_index].car_loop_cut12_20;
+		else
+			aclc_value = FE_STV0900_S2ShortCarLoop[mod_index].car_loop_cut12_30;
+
+		break;
+	}
+
+	return aclc_value;
+}
+
+static enum fe_stv0900_error stv0900_st_dvbs2_single(struct stv0900_internal *i_params,
+					enum fe_stv0900_demod_mode LDPC_Mode,
+					enum fe_stv0900_demod_num demod)
+{
+	enum fe_stv0900_error error = STV0900_NO_ERROR;
+
+	dprintk(KERN_INFO "%s\n", __func__);
+
+	switch (LDPC_Mode) {
+	case STV0900_DUAL:
+	default:
+		if ((i_params->demod_mode != STV0900_DUAL)
+			|| (stv0900_get_bits(i_params, F0900_DDEMOD) != 1)) {
+			stv0900_write_reg(i_params, R0900_GENCFG, 0x1d);
+
+			i_params->demod_mode = STV0900_DUAL;
+
+			stv0900_write_bits(i_params, F0900_FRESFEC, 1);
+			stv0900_write_bits(i_params, F0900_FRESFEC, 0);
+		}
+
+		break;
+	case STV0900_SINGLE:
+		if (demod == STV0900_DEMOD_2)
+			stv0900_write_reg(i_params, R0900_GENCFG, 0x06);
+		else
+			stv0900_write_reg(i_params, R0900_GENCFG, 0x04);
+
+		i_params->demod_mode = STV0900_SINGLE;
+
+		stv0900_write_bits(i_params, F0900_FRESFEC, 1);
+		stv0900_write_bits(i_params, F0900_FRESFEC, 0);
+		stv0900_write_bits(i_params, F0900_P1_ALGOSWRST, 1);
+		stv0900_write_bits(i_params, F0900_P1_ALGOSWRST, 0);
+		stv0900_write_bits(i_params, F0900_P2_ALGOSWRST, 1);
+		stv0900_write_bits(i_params, F0900_P2_ALGOSWRST, 0);
+		break;
+	}
+
+	return error;
+}
+
+static enum fe_stv0900_error stv0900_init_internal(struct dvb_frontend *fe,
+					struct stv0900_init_params *p_init)
+{
+	struct stv0900_state *state = fe->demodulator_priv;
+	enum fe_stv0900_error error = STV0900_NO_ERROR;
+	enum fe_stv0900_error demodError = STV0900_NO_ERROR;
+	int selosci;
+
+	struct stv0900_inode *temp_int = find_inode(state->i2c_adap,
+						state->config->demod_address);
+
+	dprintk(KERN_INFO "%s\n", __func__);
+
+	if (temp_int != NULL) {
+		state->internal = temp_int->internal;
+		(state->internal->dmds_used)++;
+		dprintk(KERN_INFO "%s: Find Internal Structure!\n", __func__);
+		return STV0900_NO_ERROR;
+	} else {
+		state->internal = kmalloc(sizeof(struct stv0900_internal), GFP_KERNEL);
+		temp_int = append_internal(state->internal);
+		state->internal->dmds_used = 1;
+		state->internal->i2c_adap = state->i2c_adap;
+		state->internal->i2c_addr = state->config->demod_address;
+		state->internal->clkmode = state->config->clkmode;
+		state->internal->errs = STV0900_NO_ERROR;
+		dprintk(KERN_INFO "%s: Create New Internal Structure!\n", __func__);
+	}
+
+	if (state->internal != NULL) {
+		demodError = stv0900_initialize(state->internal);
+		if (demodError == STV0900_NO_ERROR) {
+				error = STV0900_NO_ERROR;
+		} else {
+			if (demodError == STV0900_INVALID_HANDLE)
+				error = STV0900_INVALID_HANDLE;
+			else
+				error = STV0900_I2C_ERROR;
+		}
+
+		if (state->internal != NULL) {
+			if (error == STV0900_NO_ERROR) {
+				state->internal->demod_mode = p_init->demod_mode;
+
+				stv0900_st_dvbs2_single(state->internal, state->internal->demod_mode, STV0900_DEMOD_1);
+
+				state->internal->chip_id = stv0900_read_reg(state->internal, R0900_MID);
+				state->internal->rolloff = p_init->rolloff;
+				state->internal->quartz = p_init->dmd_ref_clk;
+
+				stv0900_write_bits(state->internal, F0900_P1_ROLLOFF_CONTROL, p_init->rolloff);
+				stv0900_write_bits(state->internal, F0900_P2_ROLLOFF_CONTROL, p_init->rolloff);
+
+				stv0900_set_ts_parallel_serial(state->internal, p_init->path1_ts_clock, p_init->path2_ts_clock);
+				stv0900_write_bits(state->internal, F0900_P1_TUN_MADDRESS, p_init->tun1_maddress);
+				switch (p_init->tuner1_adc) {
+				case 1:
+					stv0900_write_reg(state->internal, R0900_TSTTNR1, 0x26);
+					break;
+				default:
+					break;
+				}
+
+				stv0900_write_bits(state->internal, F0900_P2_TUN_MADDRESS, p_init->tun2_maddress);
+				switch (p_init->tuner2_adc) {
+				case 1:
+					stv0900_write_reg(state->internal, R0900_TSTTNR3, 0x26);
+					break;
+				default:
+					break;
+				}
+
+				stv0900_write_bits(state->internal, F0900_P1_TUN_IQSWAP, p_init->tun1_iq_inversion);
+				stv0900_write_bits(state->internal, F0900_P2_TUN_IQSWAP, p_init->tun2_iq_inversion);
+				stv0900_set_mclk(state->internal, 135000000);
+				msleep(3);
+
+				switch (state->internal->clkmode) {
+				case 0:
+				case 2:
+					stv0900_write_reg(state->internal, R0900_SYNTCTRL, 0x20 | state->internal->clkmode);
+					break;
+				default:
+					selosci = 0x02 & stv0900_read_reg(state->internal, R0900_SYNTCTRL);
+					stv0900_write_reg(state->internal, R0900_SYNTCTRL, 0x20 | selosci);
+					break;
+				}
+				msleep(3);
+
+				state->internal->mclk = stv0900_get_mclk_freq(state->internal, state->internal->quartz);
+				if (state->internal->errs)
+					error = STV0900_I2C_ERROR;
+			}
+		} else {
+			error = STV0900_INVALID_HANDLE;
+		}
+	}
+
+	return error;
+}
+
+static int stv0900_status(struct stv0900_internal *i_params,
+					enum fe_stv0900_demod_num demod)
+{
+	enum fe_stv0900_search_state demod_state;
+	s32 mode_field, delin_field, lock_field, fifo_field, lockedvit_field;
+	int locked = FALSE;
+
+	dmd_reg(mode_field, F0900_P1_HEADER_MODE, F0900_P2_HEADER_MODE);
+	dmd_reg(lock_field, F0900_P1_LOCK_DEFINITIF, F0900_P2_LOCK_DEFINITIF);
+	dmd_reg(delin_field, F0900_P1_PKTDELIN_LOCK, F0900_P2_PKTDELIN_LOCK);
+	dmd_reg(fifo_field, F0900_P1_TSFIFO_LINEOK, F0900_P2_TSFIFO_LINEOK);
+	dmd_reg(lockedvit_field, F0900_P1_LOCKEDVIT, F0900_P2_LOCKEDVIT);
+
+	demod_state = stv0900_get_bits(i_params, mode_field);
+	switch (demod_state) {
+	case STV0900_SEARCH:
+	case STV0900_PLH_DETECTED:
+	default:
+		locked = FALSE;
+		break;
+	case STV0900_DVBS2_FOUND:
+		locked = stv0900_get_bits(i_params, lock_field) &&
+				stv0900_get_bits(i_params, delin_field) &&
+				stv0900_get_bits(i_params, fifo_field);
+		break;
+	case STV0900_DVBS_FOUND:
+		locked = stv0900_get_bits(i_params, lock_field) &&
+				stv0900_get_bits(i_params, lockedvit_field) &&
+				stv0900_get_bits(i_params, fifo_field);
+		break;
+	}
+
+	return locked;
+}
+
+static enum dvbfe_search stv0900_search(struct dvb_frontend *fe,
+					struct dvb_frontend_parameters *params)
+{
+	struct stv0900_state *state = fe->demodulator_priv;
+	struct stv0900_internal *i_params = state->internal;
+	struct dtv_frontend_properties *c = &fe->dtv_property_cache;
+
+	struct stv0900_search_params p_search;
+	struct stv0900_signal_info p_result;
+
+	enum fe_stv0900_error error = STV0900_NO_ERROR;
+
+	dprintk(KERN_INFO "%s: Internal = %x\n", __func__, (u32)i_params);
+
+	p_result.locked = FALSE;
+	p_search.path = state->demod;
+	p_search.frequency = c->frequency;
+	p_search.symbol_rate = c->symbol_rate;
+	p_search.search_range = 10000000;
+	p_search.fec = STV0900_FEC_UNKNOWN;
+	p_search.standard = STV0900_AUTO_SEARCH;
+	p_search.iq_inversion = STV0900_IQ_AUTO;
+	p_search.search_algo = STV0900_BLIND_SEARCH;
+
+	if ((INRANGE(100000, p_search.symbol_rate, 70000000)) &&
+			(INRANGE(100000, p_search.search_range, 50000000))) {
+		switch (p_search.path) {
+		case STV0900_DEMOD_1:
+		default:
+			i_params->dmd1_srch_standard = p_search.standard;
+			i_params->dmd1_symbol_rate = p_search.symbol_rate;
+			i_params->dmd1_srch_range = p_search.search_range;
+			i_params->tuner1_freq = p_search.frequency;
+			i_params->dmd1_srch_algo = p_search.search_algo;
+			i_params->dmd1_srch_iq_inv = p_search.iq_inversion;
+			i_params->dmd1_fec = p_search.fec;
+			break;
+
+		case STV0900_DEMOD_2:
+			i_params->dmd2_srch_stndrd = p_search.standard;
+			i_params->dmd2_symbol_rate = p_search.symbol_rate;
+			i_params->dmd2_srch_range = p_search.search_range;
+			i_params->tuner2_freq = p_search.frequency;
+			i_params->dmd2_srch_algo = p_search.search_algo;
+			i_params->dmd2_srch_iq_inv = p_search.iq_inversion;
+			i_params->dmd2_fec = p_search.fec;
+			break;
+		}
+
+		if ((stv0900_algo(fe) == STV0900_RANGEOK) &&
+					(i_params->errs == STV0900_NO_ERROR)) {
+			switch (p_search.path) {
+			case STV0900_DEMOD_1:
+			default:
+				p_result.locked = i_params->dmd1_rslts.locked;
+				p_result.standard = i_params->dmd1_rslts.standard;
+				p_result.frequency = i_params->dmd1_rslts.frequency;
+				p_result.symbol_rate = i_params->dmd1_rslts.symbol_rate;
+				p_result.fec = i_params->dmd1_rslts.fec;
+				p_result.modcode = i_params->dmd1_rslts.modcode;
+				p_result.pilot = i_params->dmd1_rslts.pilot;
+				p_result.frame_length = i_params->dmd1_rslts.frame_length;
+				p_result.spectrum = i_params->dmd1_rslts.spectrum;
+				p_result.rolloff = i_params->dmd1_rslts.rolloff;
+				p_result.modulation = i_params->dmd1_rslts.modulation;
+				break;
+			case STV0900_DEMOD_2:
+				p_result.locked = i_params->dmd2_rslts.locked;
+				p_result.standard = i_params->dmd2_rslts.standard;
+				p_result.frequency = i_params->dmd2_rslts.frequency;
+				p_result.symbol_rate = i_params->dmd2_rslts.symbol_rate;
+				p_result.fec = i_params->dmd2_rslts.fec;
+				p_result.modcode = i_params->dmd2_rslts.modcode;
+				p_result.pilot = i_params->dmd2_rslts.pilot;
+				p_result.frame_length = i_params->dmd2_rslts.frame_length;
+				p_result.spectrum = i_params->dmd2_rslts.spectrum;
+				p_result.rolloff = i_params->dmd2_rslts.rolloff;
+				p_result.modulation = i_params->dmd2_rslts.modulation;
+				break;
+			}
+
+		} else {
+			p_result.locked = FALSE;
+			switch (p_search.path) {
+			case STV0900_DEMOD_1:
+				switch (i_params->dmd1_err) {
+				case STV0900_I2C_ERROR:
+					error = STV0900_I2C_ERROR;
+					break;
+				case STV0900_NO_ERROR:
+				default:
+					error = STV0900_SEARCH_FAILED;
+					break;
+				}
+				break;
+			case STV0900_DEMOD_2:
+				switch (i_params->dmd2_err) {
+				case STV0900_I2C_ERROR:
+					error = STV0900_I2C_ERROR;
+					break;
+				case STV0900_NO_ERROR:
+				default:
+					error = STV0900_SEARCH_FAILED;
+					break;
+				}
+				break;
+			}
+		}
+
+	} else
+		error = STV0900_BAD_PARAMETER;
+
+	if ((p_result.locked == TRUE) && (error == STV0900_NO_ERROR)) {
+		dprintk(KERN_INFO "Search Success\n");
+		return DVBFE_ALGO_SEARCH_SUCCESS;
+	} else {
+		dprintk(KERN_INFO "Search Fail\n");
+		return DVBFE_ALGO_SEARCH_FAILED;
+	}
+
+	return DVBFE_ALGO_SEARCH_ERROR;
+}
+
+static int stv0900_read_status(struct dvb_frontend *fe, enum fe_status *status)
+{
+	struct stv0900_state *state = fe->demodulator_priv;
+
+	dprintk("%s: Internal = %x\n", __func__, (unsigned int)state->internal);
+
+	if ((stv0900_status(state->internal, state->demod)) == TRUE) {
+		dprintk("DEMOD LOCK OK\n");
+		*status = FE_HAS_CARRIER
+			| FE_HAS_VITERBI
+			| FE_HAS_SYNC
+			| FE_HAS_LOCK;
+	} else
+		dprintk("DEMOD LOCK FAIL\n");
+
+	return 0;
+}
+
+static int stv0900_track(struct dvb_frontend *fe,
+			struct dvb_frontend_parameters *p)
+{
+	return 0;
+}
+
+static int stv0900_stop_ts(struct dvb_frontend *fe, int stop_ts)
+{
+
+	struct stv0900_state *state = fe->demodulator_priv;
+	struct stv0900_internal *i_params = state->internal;
+	enum fe_stv0900_demod_num demod = state->demod;
+	s32 rst_field;
+
+	dmd_reg(rst_field, F0900_P1_RST_HWARE, F0900_P2_RST_HWARE);
+
+	if (stop_ts == TRUE)
+		stv0900_write_bits(i_params, rst_field, 1);
+	else
+		stv0900_write_bits(i_params, rst_field, 0);
+
+	return 0;
+}
+
+static int stv0900_diseqc_init(struct dvb_frontend *fe)
+{
+	struct stv0900_state *state = fe->demodulator_priv;
+	struct stv0900_internal *i_params = state->internal;
+	enum fe_stv0900_demod_num demod = state->demod;
+	s32 mode_field, reset_field;
+
+	dmd_reg(mode_field, F0900_P1_DISTX_MODE, F0900_P2_DISTX_MODE);
+	dmd_reg(reset_field, F0900_P1_DISEQC_RESET, F0900_P2_DISEQC_RESET);
+
+	stv0900_write_bits(i_params, mode_field, state->config->diseqc_mode);
+	stv0900_write_bits(i_params, reset_field, 1);
+	stv0900_write_bits(i_params, reset_field, 0);
+
+	return 0;
+}
+
+static int stv0900_init(struct dvb_frontend *fe)
+{
+	dprintk(KERN_INFO "%s\n", __func__);
+
+	stv0900_stop_ts(fe, 1);
+	stv0900_diseqc_init(fe);
+
+	return 0;
+}
+
+static int stv0900_diseqc_send(struct stv0900_internal *i_params , u8 *Data,
+				u32 NbData, enum fe_stv0900_demod_num demod)
+{
+	s32 i = 0;
+
+	switch (demod) {
+	case STV0900_DEMOD_1:
+	default:
+		stv0900_write_bits(i_params, F0900_P1_DIS_PRECHARGE, 1);
+		while (i < NbData) {
+			while (stv0900_get_bits(i_params, F0900_P1_FIFO_FULL))
+				;/* checkpatch complains */
+			stv0900_write_reg(i_params, R0900_P1_DISTXDATA, Data[i]);
+			i++;
+		}
+
+		stv0900_write_bits(i_params, F0900_P1_DIS_PRECHARGE, 0);
+		i = 0;
+		while ((stv0900_get_bits(i_params, F0900_P1_TX_IDLE) != 1) && (i < 10)) {
+			msleep(10);
+			i++;
+		}
+
+		break;
+	case STV0900_DEMOD_2:
+		stv0900_write_bits(i_params, F0900_P2_DIS_PRECHARGE, 1);
+
+		while (i < NbData) {
+			while (stv0900_get_bits(i_params, F0900_P2_FIFO_FULL))
+				;/* checkpatch complains */
+			stv0900_write_reg(i_params, R0900_P2_DISTXDATA, Data[i]);
+			i++;
+		}
+
+		stv0900_write_bits(i_params, F0900_P2_DIS_PRECHARGE, 0);
+		i = 0;
+		while ((stv0900_get_bits(i_params, F0900_P2_TX_IDLE) != 1) && (i < 10)) {
+			msleep(10);
+			i++;
+		}
+
+		break;
+	}
+
+	return 0;
+}
+
+static int stv0900_send_master_cmd(struct dvb_frontend *fe,
+					struct dvb_diseqc_master_cmd *cmd)
+{
+	struct stv0900_state *state = fe->demodulator_priv;
+
+	return stv0900_diseqc_send(state->internal,
+				cmd->msg,
+				cmd->msg_len,
+				state->demod);
+}
+
+static int stv0900_send_burst(struct dvb_frontend *fe, fe_sec_mini_cmd_t burst)
+{
+	struct stv0900_state *state = fe->demodulator_priv;
+	struct stv0900_internal *i_params = state->internal;
+	enum fe_stv0900_demod_num demod = state->demod;
+	s32 mode_field;
+	u32 diseqc_fifo;
+
+	dmd_reg(mode_field, F0900_P1_DISTX_MODE, F0900_P2_DISTX_MODE);
+	dmd_reg(diseqc_fifo, R0900_P1_DISTXDATA, R0900_P2_DISTXDATA);
+
+	switch (burst) {
+	case SEC_MINI_A:
+		stv0900_write_bits(i_params, mode_field, 3);/* Unmodulated */
+		stv0900_write_reg(i_params, diseqc_fifo, 0x00);
+		break;
+	case SEC_MINI_B:
+		stv0900_write_bits(i_params, mode_field, 2);/* Modulated */
+		stv0900_write_reg(i_params, diseqc_fifo, 0xff);
+		break;
+	}
+
+	return 0;
+}
+
+static int stv0900_recv_slave_reply(struct dvb_frontend *fe,
+				struct dvb_diseqc_slave_reply *reply)
+{
+	struct stv0900_state *state = fe->demodulator_priv;
+	struct stv0900_internal *i_params = state->internal;
+	s32 i = 0;
+
+	switch (state->demod) {
+	case STV0900_DEMOD_1:
+	default:
+		reply->msg_len = 0;
+
+		while ((stv0900_get_bits(i_params, F0900_P1_RX_END) != 1) && (i < 10)) {
+			msleep(10);
+			i++;
+		}
+
+		if (stv0900_get_bits(i_params, F0900_P1_RX_END)) {
+			reply->msg_len = stv0900_get_bits(i_params, F0900_P1_FIFO_BYTENBR);
+
+			for (i = 0; i < reply->msg_len; i++)
+				reply->msg[i] = stv0900_read_reg(i_params, R0900_P1_DISRXDATA);
+		}
+		break;
+	case STV0900_DEMOD_2:
+		reply->msg_len = 0;
+
+		while ((stv0900_get_bits(i_params, F0900_P2_RX_END) != 1) && (i < 10)) {
+			msleep(10);
+			i++;
+		}
+
+		if (stv0900_get_bits(i_params, F0900_P2_RX_END)) {
+			reply->msg_len = stv0900_get_bits(i_params, F0900_P2_FIFO_BYTENBR);
+
+			for (i = 0; i < reply->msg_len; i++)
+				reply->msg[i] = stv0900_read_reg(i_params, R0900_P2_DISRXDATA);
+		}
+		break;
+	}
+
+	return 0;
+}
+
+static int stv0900_set_tone(struct dvb_frontend *fe, fe_sec_tone_mode_t tone)
+{
+	struct stv0900_state *state = fe->demodulator_priv;
+	struct stv0900_internal *i_params = state->internal;
+	enum fe_stv0900_demod_num demod = state->demod;
+	s32 mode_field, reset_field;
+
+	dprintk(KERN_INFO "%s: %s\n", __func__, ((tone == 0) ? "Off" : "On"));
+
+	dmd_reg(mode_field, F0900_P1_DISTX_MODE, F0900_P2_DISTX_MODE);
+	dmd_reg(reset_field, F0900_P1_DISEQC_RESET, F0900_P2_DISEQC_RESET);
+
+	if (tone) {
+		/*Set the DiseqC mode to 22Khz continues tone*/
+		stv0900_write_bits(i_params, mode_field, 0);
+		stv0900_write_bits(i_params, reset_field, 1);
+		/*release DiseqC reset to enable the 22KHz tone*/
+		stv0900_write_bits(i_params, reset_field, 0);
+	} else {
+		stv0900_write_bits(i_params, mode_field, 0);
+		/*maintain the DiseqC reset to disable the 22KHz tone*/
+		stv0900_write_bits(i_params, reset_field, 1);
+	}
+
+	return 0;
+}
+
+static void stv0900_release(struct dvb_frontend *fe)
+{
+	struct stv0900_state *state = fe->demodulator_priv;
+
+	dprintk(KERN_INFO "%s\n", __func__);
+
+	if ((--(state->internal->dmds_used)) <= 0) {
+
+		dprintk(KERN_INFO "%s: Actually removing\n", __func__);
+
+		remove_inode(state->internal);
+		kfree(state->internal);
+	}
+
+	kfree(state);
+}
+
+static struct dvb_frontend_ops stv0900_ops = {
+
+	.info = {
+		.name			= "STV0900 frontend",
+		.type			= FE_QPSK,
+		.frequency_min		= 950000,
+		.frequency_max		= 2150000,
+		.frequency_stepsize	= 125,
+		.frequency_tolerance	= 0,
+		.symbol_rate_min	= 1000000,
+		.symbol_rate_max	= 45000000,
+		.symbol_rate_tolerance	= 500,
+		.caps			= FE_CAN_FEC_1_2 | FE_CAN_FEC_2_3 |
+					  FE_CAN_FEC_3_4 | FE_CAN_FEC_5_6 |
+					  FE_CAN_FEC_7_8 | FE_CAN_QPSK    |
+					  FE_CAN_2G_MODULATION |
+					  FE_CAN_FEC_AUTO
+	},
+	.release			= stv0900_release,
+	.init				= stv0900_init,
+	.get_frontend_algo		= stv0900_frontend_algo,
+	.i2c_gate_ctrl			= stv0900_i2c_gate_ctrl,
+	.diseqc_send_master_cmd		= stv0900_send_master_cmd,
+	.diseqc_send_burst		= stv0900_send_burst,
+	.diseqc_recv_slave_reply	= stv0900_recv_slave_reply,
+	.set_tone			= stv0900_set_tone,
+	.set_property			= stb0900_set_property,
+	.get_property			= stb0900_get_property,
+	.search				= stv0900_search,
+	.track				= stv0900_track,
+	.read_status			= stv0900_read_status,
+	.read_ber			= stv0900_read_ber,
+	.read_signal_strength		= stv0900_read_signal_strength,
+	.read_snr			= stv0900_read_snr,
+};
+
+struct dvb_frontend *stv0900_attach(const struct stv0900_config *config,
+					struct i2c_adapter *i2c,
+					int demod)
+{
+	struct stv0900_state *state = NULL;
+	struct stv0900_init_params init_params;
+	enum fe_stv0900_error err_stv0900;
+
+	state = kzalloc(sizeof(struct stv0900_state), GFP_KERNEL);
+	if (state == NULL)
+		goto error;
+
+	state->demod		= demod;
+	state->config		= config;
+	state->i2c_adap		= i2c;
+
+	memcpy(&state->frontend.ops, &stv0900_ops,
+			sizeof(struct dvb_frontend_ops));
+	state->frontend.demodulator_priv = state;
+
+	switch (demod) {
+	case 0:
+	case 1:
+		init_params.dmd_ref_clk  	= config->xtal;
+		init_params.demod_mode		= STV0900_DUAL;
+		init_params.rolloff		= STV0900_35;
+		init_params.path1_ts_clock	= config->path1_mode;
+		init_params.tun1_maddress	= config->tun1_maddress;
+		init_params.tun1_iq_inversion	= STV0900_IQ_NORMAL;
+		init_params.tuner1_adc		= config->tun1_adc;
+		init_params.path2_ts_clock	= config->path2_mode;
+		init_params.tun2_maddress	= config->tun2_maddress;
+		init_params.tuner2_adc		= config->tun2_adc;
+		init_params.tun2_iq_inversion	= STV0900_IQ_SWAPPED;
+
+		err_stv0900 = stv0900_init_internal(&state->frontend,
+							&init_params);
+
+		if (err_stv0900)
+			goto error;
+
+		dprintk(KERN_INFO "%s: Init Result = %d, handle_stv0900 = %x\n",
+			__func__, err_stv0900, (unsigned int)state->internal);
+		break;
+	default:
+		goto error;
+		break;
+	}
+
+	dprintk("%s: Attaching STV0900 demodulator(%d) \n", __func__, demod);
+	return &state->frontend;
+
+error:
+	dprintk("%s: Failed to attach STV0900 demodulator(%d) \n",
+		__func__, demod);
+	kfree(state);
+	return NULL;
+}
+EXPORT_SYMBOL(stv0900_attach);
+
+MODULE_PARM_DESC(debug, "Set debug");
+
+MODULE_AUTHOR("Igor M. Liplianin");
+MODULE_DESCRIPTION("ST STV0900 frontend");
+MODULE_LICENSE("GPL");