Adding upstream version 4.19.249.upstream/4.19.249

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

1 files changed, 885 insertions, 0 deletions

diff --git a/drivers/media/tuners/tda8290.c b/drivers/media/tuners/tda8290.c
new file mode 100644
index 000000000..9f1f1d2b8
--- /dev/null
+++ b/drivers/media/tuners/tda8290.c
@@ -0,0 +1,885 @@
+/*
+
+   i2c tv tuner chip device driver
+   controls the philips tda8290+75 tuner chip combo.
+
+   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.
+
+   This "tda8290" module was split apart from the original "tuner" module.
+*/
+
+#include <linux/i2c.h>
+#include <linux/slab.h>
+#include <linux/delay.h>
+#include <linux/videodev2.h>
+#include "tuner-i2c.h"
+#include "tda8290.h"
+#include "tda827x.h"
+#include "tda18271.h"
+
+static int debug;
+module_param(debug, int, 0644);
+MODULE_PARM_DESC(debug, "enable verbose debug messages");
+
+static int deemphasis_50;
+module_param(deemphasis_50, int, 0644);
+MODULE_PARM_DESC(deemphasis_50, "0 - 75us deemphasis; 1 - 50us deemphasis");
+
+/* ---------------------------------------------------------------------- */
+
+struct tda8290_priv {
+	struct tuner_i2c_props i2c_props;
+
+	unsigned char tda8290_easy_mode;
+
+	unsigned char tda827x_addr;
+
+	unsigned char ver;
+#define TDA8290   1
+#define TDA8295   2
+#define TDA8275   4
+#define TDA8275A  8
+#define TDA18271 16
+
+	struct tda827x_config cfg;
+	struct tda18271_std_map *tda18271_std_map;
+};
+
+/*---------------------------------------------------------------------*/
+
+static int tda8290_i2c_bridge(struct dvb_frontend *fe, int close)
+{
+	struct tda8290_priv *priv = fe->analog_demod_priv;
+
+	static unsigned char  enable[2] = { 0x21, 0xC0 };
+	static unsigned char disable[2] = { 0x21, 0x00 };
+	unsigned char *msg;
+
+	if (close) {
+		msg = enable;
+		tuner_i2c_xfer_send(&priv->i2c_props, msg, 2);
+		/* let the bridge stabilize */
+		msleep(20);
+	} else {
+		msg = disable;
+		tuner_i2c_xfer_send(&priv->i2c_props, msg, 2);
+	}
+
+	return 0;
+}
+
+static int tda8295_i2c_bridge(struct dvb_frontend *fe, int close)
+{
+	struct tda8290_priv *priv = fe->analog_demod_priv;
+
+	static unsigned char  enable[2] = { 0x45, 0xc1 };
+	static unsigned char disable[2] = { 0x46, 0x00 };
+	static unsigned char buf[3] = { 0x45, 0x01, 0x00 };
+	unsigned char *msg;
+
+	if (close) {
+		msg = enable;
+		tuner_i2c_xfer_send(&priv->i2c_props, msg, 2);
+		/* let the bridge stabilize */
+		msleep(20);
+	} else {
+		msg = disable;
+		tuner_i2c_xfer_send_recv(&priv->i2c_props, msg, 1, &msg[1], 1);
+
+		buf[2] = msg[1];
+		buf[2] &= ~0x04;
+		tuner_i2c_xfer_send(&priv->i2c_props, buf, 3);
+		msleep(5);
+
+		msg[1] |= 0x04;
+		tuner_i2c_xfer_send(&priv->i2c_props, msg, 2);
+	}
+
+	return 0;
+}
+
+/*---------------------------------------------------------------------*/
+
+static void set_audio(struct dvb_frontend *fe,
+		      struct analog_parameters *params)
+{
+	struct tda8290_priv *priv = fe->analog_demod_priv;
+	char* mode;
+
+	if (params->std & V4L2_STD_MN) {
+		priv->tda8290_easy_mode = 0x01;
+		mode = "MN";
+	} else if (params->std & V4L2_STD_B) {
+		priv->tda8290_easy_mode = 0x02;
+		mode = "B";
+	} else if (params->std & V4L2_STD_GH) {
+		priv->tda8290_easy_mode = 0x04;
+		mode = "GH";
+	} else if (params->std & V4L2_STD_PAL_I) {
+		priv->tda8290_easy_mode = 0x08;
+		mode = "I";
+	} else if (params->std & V4L2_STD_DK) {
+		priv->tda8290_easy_mode = 0x10;
+		mode = "DK";
+	} else if (params->std & V4L2_STD_SECAM_L) {
+		priv->tda8290_easy_mode = 0x20;
+		mode = "L";
+	} else if (params->std & V4L2_STD_SECAM_LC) {
+		priv->tda8290_easy_mode = 0x40;
+		mode = "LC";
+	} else {
+		priv->tda8290_easy_mode = 0x10;
+		mode = "xx";
+	}
+
+	if (params->mode == V4L2_TUNER_RADIO) {
+		/* Set TDA8295 to FM radio; Start TDA8290 with MN values */
+		priv->tda8290_easy_mode = (priv->ver & TDA8295) ? 0x80 : 0x01;
+		tuner_dbg("setting to radio FM\n");
+	} else {
+		tuner_dbg("setting tda829x to system %s\n", mode);
+	}
+}
+
+static struct {
+	unsigned char seq[2];
+} fm_mode[] = {
+	{ { 0x01, 0x81} },	/* Put device into expert mode */
+	{ { 0x03, 0x48} },	/* Disable NOTCH and VIDEO filters */
+	{ { 0x04, 0x04} },	/* Disable color carrier filter (SSIF) */
+	{ { 0x05, 0x04} },	/* ADC headroom */
+	{ { 0x06, 0x10} },	/* group delay flat */
+
+	{ { 0x07, 0x00} },	/* use the same radio DTO values as a tda8295 */
+	{ { 0x08, 0x00} },
+	{ { 0x09, 0x80} },
+	{ { 0x0a, 0xda} },
+	{ { 0x0b, 0x4b} },
+	{ { 0x0c, 0x68} },
+
+	{ { 0x0d, 0x00} },	/* PLL off, no video carrier detect */
+	{ { 0x14, 0x00} },	/* disable auto mute if no video */
+};
+
+static void tda8290_set_params(struct dvb_frontend *fe,
+			       struct analog_parameters *params)
+{
+	struct tda8290_priv *priv = fe->analog_demod_priv;
+
+	static unsigned char soft_reset[]  = { 0x00, 0x00 };
+	unsigned char easy_mode[]   = { 0x01, priv->tda8290_easy_mode };
+	static unsigned char expert_mode[] = { 0x01, 0x80 };
+	static unsigned char agc_out_on[]  = { 0x02, 0x00 };
+	static unsigned char gainset_off[] = { 0x28, 0x14 };
+	static unsigned char if_agc_spd[]  = { 0x0f, 0x88 };
+	static unsigned char adc_head_6[]  = { 0x05, 0x04 };
+	static unsigned char adc_head_9[]  = { 0x05, 0x02 };
+	static unsigned char adc_head_12[] = { 0x05, 0x01 };
+	static unsigned char pll_bw_nom[]  = { 0x0d, 0x47 };
+	static unsigned char pll_bw_low[]  = { 0x0d, 0x27 };
+	static unsigned char gainset_2[]   = { 0x28, 0x64 };
+	static unsigned char agc_rst_on[]  = { 0x0e, 0x0b };
+	static unsigned char agc_rst_off[] = { 0x0e, 0x09 };
+	static unsigned char if_agc_set[]  = { 0x0f, 0x81 };
+	static unsigned char addr_adc_sat  = 0x1a;
+	static unsigned char addr_agc_stat = 0x1d;
+	static unsigned char addr_pll_stat = 0x1b;
+	static unsigned char adc_sat = 0, agc_stat = 0,
+		      pll_stat;
+	int i;
+
+	set_audio(fe, params);
+
+	if (priv->cfg.config)
+		tuner_dbg("tda827xa config is 0x%02x\n", priv->cfg.config);
+	tuner_i2c_xfer_send(&priv->i2c_props, easy_mode, 2);
+	tuner_i2c_xfer_send(&priv->i2c_props, agc_out_on, 2);
+	tuner_i2c_xfer_send(&priv->i2c_props, soft_reset, 2);
+	msleep(1);
+
+	if (params->mode == V4L2_TUNER_RADIO) {
+		unsigned char deemphasis[]  = { 0x13, 1 };
+
+		/* FIXME: allow using a different deemphasis */
+
+		if (deemphasis_50)
+			deemphasis[1] = 2;
+
+		for (i = 0; i < ARRAY_SIZE(fm_mode); i++)
+			tuner_i2c_xfer_send(&priv->i2c_props, fm_mode[i].seq, 2);
+
+		tuner_i2c_xfer_send(&priv->i2c_props, deemphasis, 2);
+	} else {
+		expert_mode[1] = priv->tda8290_easy_mode + 0x80;
+		tuner_i2c_xfer_send(&priv->i2c_props, expert_mode, 2);
+		tuner_i2c_xfer_send(&priv->i2c_props, gainset_off, 2);
+		tuner_i2c_xfer_send(&priv->i2c_props, if_agc_spd, 2);
+		if (priv->tda8290_easy_mode & 0x60)
+			tuner_i2c_xfer_send(&priv->i2c_props, adc_head_9, 2);
+		else
+			tuner_i2c_xfer_send(&priv->i2c_props, adc_head_6, 2);
+		tuner_i2c_xfer_send(&priv->i2c_props, pll_bw_nom, 2);
+	}
+
+
+	if (fe->ops.analog_ops.i2c_gate_ctrl)
+		fe->ops.analog_ops.i2c_gate_ctrl(fe, 1);
+
+	if (fe->ops.tuner_ops.set_analog_params)
+		fe->ops.tuner_ops.set_analog_params(fe, params);
+
+	for (i = 0; i < 3; i++) {
+		tuner_i2c_xfer_send_recv(&priv->i2c_props,
+					 &addr_pll_stat, 1, &pll_stat, 1);
+		if (pll_stat & 0x80) {
+			tuner_i2c_xfer_send_recv(&priv->i2c_props,
+						 &addr_adc_sat, 1,
+						 &adc_sat, 1);
+			tuner_i2c_xfer_send_recv(&priv->i2c_props,
+						 &addr_agc_stat, 1,
+						 &agc_stat, 1);
+			tuner_dbg("tda8290 is locked, AGC: %d\n", agc_stat);
+			break;
+		} else {
+			tuner_dbg("tda8290 not locked, no signal?\n");
+			msleep(100);
+		}
+	}
+	/* adjust headroom resp. gain */
+	if ((agc_stat > 115) || (!(pll_stat & 0x80) && (adc_sat < 20))) {
+		tuner_dbg("adjust gain, step 1. Agc: %d, ADC stat: %d, lock: %d\n",
+			   agc_stat, adc_sat, pll_stat & 0x80);
+		tuner_i2c_xfer_send(&priv->i2c_props, gainset_2, 2);
+		msleep(100);
+		tuner_i2c_xfer_send_recv(&priv->i2c_props,
+					 &addr_agc_stat, 1, &agc_stat, 1);
+		tuner_i2c_xfer_send_recv(&priv->i2c_props,
+					 &addr_pll_stat, 1, &pll_stat, 1);
+		if ((agc_stat > 115) || !(pll_stat & 0x80)) {
+			tuner_dbg("adjust gain, step 2. Agc: %d, lock: %d\n",
+				   agc_stat, pll_stat & 0x80);
+			if (priv->cfg.agcf)
+				priv->cfg.agcf(fe);
+			msleep(100);
+			tuner_i2c_xfer_send_recv(&priv->i2c_props,
+						 &addr_agc_stat, 1,
+						 &agc_stat, 1);
+			tuner_i2c_xfer_send_recv(&priv->i2c_props,
+						 &addr_pll_stat, 1,
+						 &pll_stat, 1);
+			if((agc_stat > 115) || !(pll_stat & 0x80)) {
+				tuner_dbg("adjust gain, step 3. Agc: %d\n", agc_stat);
+				tuner_i2c_xfer_send(&priv->i2c_props, adc_head_12, 2);
+				tuner_i2c_xfer_send(&priv->i2c_props, pll_bw_low, 2);
+				msleep(100);
+			}
+		}
+	}
+
+	/* l/ l' deadlock? */
+	if(priv->tda8290_easy_mode & 0x60) {
+		tuner_i2c_xfer_send_recv(&priv->i2c_props,
+					 &addr_adc_sat, 1,
+					 &adc_sat, 1);
+		tuner_i2c_xfer_send_recv(&priv->i2c_props,
+					 &addr_pll_stat, 1,
+					 &pll_stat, 1);
+		if ((adc_sat > 20) || !(pll_stat & 0x80)) {
+			tuner_dbg("trying to resolve SECAM L deadlock\n");
+			tuner_i2c_xfer_send(&priv->i2c_props, agc_rst_on, 2);
+			msleep(40);
+			tuner_i2c_xfer_send(&priv->i2c_props, agc_rst_off, 2);
+		}
+	}
+
+	if (fe->ops.analog_ops.i2c_gate_ctrl)
+		fe->ops.analog_ops.i2c_gate_ctrl(fe, 0);
+	tuner_i2c_xfer_send(&priv->i2c_props, if_agc_set, 2);
+}
+
+/*---------------------------------------------------------------------*/
+
+static void tda8295_power(struct dvb_frontend *fe, int enable)
+{
+	struct tda8290_priv *priv = fe->analog_demod_priv;
+	unsigned char buf[] = { 0x30, 0x00 }; /* clb_stdbt */
+
+	tuner_i2c_xfer_send_recv(&priv->i2c_props, &buf[0], 1, &buf[1], 1);
+
+	if (enable)
+		buf[1] = 0x01;
+	else
+		buf[1] = 0x03;
+
+	tuner_i2c_xfer_send(&priv->i2c_props, buf, 2);
+}
+
+static void tda8295_set_easy_mode(struct dvb_frontend *fe, int enable)
+{
+	struct tda8290_priv *priv = fe->analog_demod_priv;
+	unsigned char buf[] = { 0x01, 0x00 };
+
+	tuner_i2c_xfer_send_recv(&priv->i2c_props, &buf[0], 1, &buf[1], 1);
+
+	if (enable)
+		buf[1] = 0x01; /* rising edge sets regs 0x02 - 0x23 */
+	else
+		buf[1] = 0x00; /* reset active bit */
+
+	tuner_i2c_xfer_send(&priv->i2c_props, buf, 2);
+}
+
+static void tda8295_set_video_std(struct dvb_frontend *fe)
+{
+	struct tda8290_priv *priv = fe->analog_demod_priv;
+	unsigned char buf[] = { 0x00, priv->tda8290_easy_mode };
+
+	tuner_i2c_xfer_send(&priv->i2c_props, buf, 2);
+
+	tda8295_set_easy_mode(fe, 1);
+	msleep(20);
+	tda8295_set_easy_mode(fe, 0);
+}
+
+/*---------------------------------------------------------------------*/
+
+static void tda8295_agc1_out(struct dvb_frontend *fe, int enable)
+{
+	struct tda8290_priv *priv = fe->analog_demod_priv;
+	unsigned char buf[] = { 0x02, 0x00 }; /* DIV_FUNC */
+
+	tuner_i2c_xfer_send_recv(&priv->i2c_props, &buf[0], 1, &buf[1], 1);
+
+	if (enable)
+		buf[1] &= ~0x40;
+	else
+		buf[1] |= 0x40;
+
+	tuner_i2c_xfer_send(&priv->i2c_props, buf, 2);
+}
+
+static void tda8295_agc2_out(struct dvb_frontend *fe, int enable)
+{
+	struct tda8290_priv *priv = fe->analog_demod_priv;
+	unsigned char set_gpio_cf[]    = { 0x44, 0x00 };
+	unsigned char set_gpio_val[]   = { 0x46, 0x00 };
+
+	tuner_i2c_xfer_send_recv(&priv->i2c_props,
+				 &set_gpio_cf[0], 1, &set_gpio_cf[1], 1);
+	tuner_i2c_xfer_send_recv(&priv->i2c_props,
+				 &set_gpio_val[0], 1, &set_gpio_val[1], 1);
+
+	set_gpio_cf[1] &= 0xf0; /* clear GPIO_0 bits 3-0 */
+
+	if (enable) {
+		set_gpio_cf[1]  |= 0x01; /* config GPIO_0 as Open Drain Out */
+		set_gpio_val[1] &= 0xfe; /* set GPIO_0 pin low */
+	}
+	tuner_i2c_xfer_send(&priv->i2c_props, set_gpio_cf, 2);
+	tuner_i2c_xfer_send(&priv->i2c_props, set_gpio_val, 2);
+}
+
+static int tda8295_has_signal(struct dvb_frontend *fe, u16 *signal)
+{
+	struct tda8290_priv *priv = fe->analog_demod_priv;
+
+	unsigned char hvpll_stat = 0x26;
+	unsigned char ret;
+
+	tuner_i2c_xfer_send_recv(&priv->i2c_props, &hvpll_stat, 1, &ret, 1);
+	*signal = (ret & 0x01) ? 65535 : 0;
+	return 0;
+}
+
+/*---------------------------------------------------------------------*/
+
+static void tda8295_set_params(struct dvb_frontend *fe,
+			       struct analog_parameters *params)
+{
+	struct tda8290_priv *priv = fe->analog_demod_priv;
+	u16 signal = 0;
+	unsigned char blanking_mode[]     = { 0x1d, 0x00 };
+
+	set_audio(fe, params);
+
+	tuner_dbg("%s: freq = %d\n", __func__, params->frequency);
+
+	tda8295_power(fe, 1);
+	tda8295_agc1_out(fe, 1);
+
+	tuner_i2c_xfer_send_recv(&priv->i2c_props,
+				 &blanking_mode[0], 1, &blanking_mode[1], 1);
+
+	tda8295_set_video_std(fe);
+
+	blanking_mode[1] = 0x03;
+	tuner_i2c_xfer_send(&priv->i2c_props, blanking_mode, 2);
+	msleep(20);
+
+	if (fe->ops.analog_ops.i2c_gate_ctrl)
+		fe->ops.analog_ops.i2c_gate_ctrl(fe, 1);
+
+	if (fe->ops.tuner_ops.set_analog_params)
+		fe->ops.tuner_ops.set_analog_params(fe, params);
+
+	if (priv->cfg.agcf)
+		priv->cfg.agcf(fe);
+
+	tda8295_has_signal(fe, &signal);
+	if (signal)
+		tuner_dbg("tda8295 is locked\n");
+	else
+		tuner_dbg("tda8295 not locked, no signal?\n");
+
+	if (fe->ops.analog_ops.i2c_gate_ctrl)
+		fe->ops.analog_ops.i2c_gate_ctrl(fe, 0);
+}
+
+/*---------------------------------------------------------------------*/
+
+static int tda8290_has_signal(struct dvb_frontend *fe, u16 *signal)
+{
+	struct tda8290_priv *priv = fe->analog_demod_priv;
+
+	unsigned char i2c_get_afc[1] = { 0x1B };
+	unsigned char afc = 0;
+
+	tuner_i2c_xfer_send_recv(&priv->i2c_props,
+				 i2c_get_afc, ARRAY_SIZE(i2c_get_afc), &afc, 1);
+	*signal = (afc & 0x80) ? 65535 : 0;
+	return 0;
+}
+
+/*---------------------------------------------------------------------*/
+
+static void tda8290_standby(struct dvb_frontend *fe)
+{
+	struct tda8290_priv *priv = fe->analog_demod_priv;
+
+	static unsigned char cb1[] = { 0x30, 0xD0 };
+	static unsigned char tda8290_standby[] = { 0x00, 0x02 };
+	static unsigned char tda8290_agc_tri[] = { 0x02, 0x20 };
+	struct i2c_msg msg = {.addr = priv->tda827x_addr, .flags=0, .buf=cb1, .len = 2};
+
+	if (fe->ops.analog_ops.i2c_gate_ctrl)
+		fe->ops.analog_ops.i2c_gate_ctrl(fe, 1);
+	if (priv->ver & TDA8275A)
+		cb1[1] = 0x90;
+	i2c_transfer(priv->i2c_props.adap, &msg, 1);
+	if (fe->ops.analog_ops.i2c_gate_ctrl)
+		fe->ops.analog_ops.i2c_gate_ctrl(fe, 0);
+	tuner_i2c_xfer_send(&priv->i2c_props, tda8290_agc_tri, 2);
+	tuner_i2c_xfer_send(&priv->i2c_props, tda8290_standby, 2);
+}
+
+static void tda8295_standby(struct dvb_frontend *fe)
+{
+	tda8295_agc1_out(fe, 0); /* Put AGC in tri-state */
+
+	tda8295_power(fe, 0);
+}
+
+static void tda8290_init_if(struct dvb_frontend *fe)
+{
+	struct tda8290_priv *priv = fe->analog_demod_priv;
+
+	static unsigned char set_VS[] = { 0x30, 0x6F };
+	static unsigned char set_GP00_CF[] = { 0x20, 0x01 };
+	static unsigned char set_GP01_CF[] = { 0x20, 0x0B };
+
+	if ((priv->cfg.config == TDA8290_LNA_GP0_HIGH_ON) ||
+	    (priv->cfg.config == TDA8290_LNA_GP0_HIGH_OFF))
+		tuner_i2c_xfer_send(&priv->i2c_props, set_GP00_CF, 2);
+	else
+		tuner_i2c_xfer_send(&priv->i2c_props, set_GP01_CF, 2);
+	tuner_i2c_xfer_send(&priv->i2c_props, set_VS, 2);
+}
+
+static void tda8295_init_if(struct dvb_frontend *fe)
+{
+	struct tda8290_priv *priv = fe->analog_demod_priv;
+
+	static unsigned char set_adc_ctl[]       = { 0x33, 0x14 };
+	static unsigned char set_adc_ctl2[]      = { 0x34, 0x00 };
+	static unsigned char set_pll_reg6[]      = { 0x3e, 0x63 };
+	static unsigned char set_pll_reg0[]      = { 0x38, 0x23 };
+	static unsigned char set_pll_reg7[]      = { 0x3f, 0x01 };
+	static unsigned char set_pll_reg10[]     = { 0x42, 0x61 };
+	static unsigned char set_gpio_reg0[]     = { 0x44, 0x0b };
+
+	tda8295_power(fe, 1);
+
+	tda8295_set_easy_mode(fe, 0);
+	tda8295_set_video_std(fe);
+
+	tuner_i2c_xfer_send(&priv->i2c_props, set_adc_ctl, 2);
+	tuner_i2c_xfer_send(&priv->i2c_props, set_adc_ctl2, 2);
+	tuner_i2c_xfer_send(&priv->i2c_props, set_pll_reg6, 2);
+	tuner_i2c_xfer_send(&priv->i2c_props, set_pll_reg0, 2);
+	tuner_i2c_xfer_send(&priv->i2c_props, set_pll_reg7, 2);
+	tuner_i2c_xfer_send(&priv->i2c_props, set_pll_reg10, 2);
+	tuner_i2c_xfer_send(&priv->i2c_props, set_gpio_reg0, 2);
+
+	tda8295_agc1_out(fe, 0);
+	tda8295_agc2_out(fe, 0);
+}
+
+static void tda8290_init_tuner(struct dvb_frontend *fe)
+{
+	struct tda8290_priv *priv = fe->analog_demod_priv;
+	static unsigned char tda8275_init[]  =
+		{ 0x00, 0x00, 0x00, 0x40, 0xdC, 0x04, 0xAf,
+		  0x3F, 0x2A, 0x04, 0xFF, 0x00, 0x00, 0x40 };
+	static unsigned char tda8275a_init[] =
+		 { 0x00, 0x00, 0x00, 0x00, 0xdC, 0x05, 0x8b,
+		   0x0c, 0x04, 0x20, 0xFF, 0x00, 0x00, 0x4b };
+	struct i2c_msg msg = {.addr = priv->tda827x_addr, .flags=0,
+			      .buf=tda8275_init, .len = 14};
+	if (priv->ver & TDA8275A)
+		msg.buf = tda8275a_init;
+
+	if (fe->ops.analog_ops.i2c_gate_ctrl)
+		fe->ops.analog_ops.i2c_gate_ctrl(fe, 1);
+	i2c_transfer(priv->i2c_props.adap, &msg, 1);
+	if (fe->ops.analog_ops.i2c_gate_ctrl)
+		fe->ops.analog_ops.i2c_gate_ctrl(fe, 0);
+}
+
+/*---------------------------------------------------------------------*/
+
+static void tda829x_release(struct dvb_frontend *fe)
+{
+	struct tda8290_priv *priv = fe->analog_demod_priv;
+
+	/* only try to release the tuner if we've
+	 * attached it from within this module */
+	if (priv->ver & (TDA18271 | TDA8275 | TDA8275A))
+		if (fe->ops.tuner_ops.release)
+			fe->ops.tuner_ops.release(fe);
+
+	kfree(fe->analog_demod_priv);
+	fe->analog_demod_priv = NULL;
+}
+
+static struct tda18271_config tda829x_tda18271_config = {
+	.gate    = TDA18271_GATE_ANALOG,
+};
+
+static int tda829x_find_tuner(struct dvb_frontend *fe)
+{
+	struct tda8290_priv *priv = fe->analog_demod_priv;
+	int i, ret, tuners_found;
+	u32 tuner_addrs;
+	u8 data;
+	struct i2c_msg msg = { .flags = I2C_M_RD, .buf = &data, .len = 1 };
+
+	if (fe->ops.analog_ops.i2c_gate_ctrl)
+		fe->ops.analog_ops.i2c_gate_ctrl(fe, 1);
+
+	/* probe for tuner chip */
+	tuners_found = 0;
+	tuner_addrs = 0;
+	for (i = 0x60; i <= 0x63; i++) {
+		msg.addr = i;
+		ret = i2c_transfer(priv->i2c_props.adap, &msg, 1);
+		if (ret == 1) {
+			tuners_found++;
+			tuner_addrs = (tuner_addrs << 8) + i;
+		}
+	}
+	/* if there is more than one tuner, we expect the right one is
+	   behind the bridge and we choose the highest address that doesn't
+	   give a response now
+	 */
+
+	if (fe->ops.analog_ops.i2c_gate_ctrl)
+		fe->ops.analog_ops.i2c_gate_ctrl(fe, 0);
+
+	if (tuners_found > 1)
+		for (i = 0; i < tuners_found; i++) {
+			msg.addr = tuner_addrs  & 0xff;
+			ret = i2c_transfer(priv->i2c_props.adap, &msg, 1);
+			if (ret == 1)
+				tuner_addrs = tuner_addrs >> 8;
+			else
+				break;
+		}
+
+	if (tuner_addrs == 0) {
+		tuner_addrs = 0x60;
+		tuner_info("could not clearly identify tuner address, defaulting to %x\n",
+			   tuner_addrs);
+	} else {
+		tuner_addrs = tuner_addrs & 0xff;
+		tuner_info("setting tuner address to %x\n", tuner_addrs);
+	}
+	priv->tda827x_addr = tuner_addrs;
+	msg.addr = tuner_addrs;
+
+	if (fe->ops.analog_ops.i2c_gate_ctrl)
+		fe->ops.analog_ops.i2c_gate_ctrl(fe, 1);
+	ret = i2c_transfer(priv->i2c_props.adap, &msg, 1);
+
+	if (ret != 1) {
+		tuner_warn("tuner access failed!\n");
+		if (fe->ops.analog_ops.i2c_gate_ctrl)
+			fe->ops.analog_ops.i2c_gate_ctrl(fe, 0);
+		return -EREMOTEIO;
+	}
+
+	if ((data == 0x83) || (data == 0x84)) {
+		priv->ver |= TDA18271;
+		tda829x_tda18271_config.config = priv->cfg.config;
+		tda829x_tda18271_config.std_map = priv->tda18271_std_map;
+		dvb_attach(tda18271_attach, fe, priv->tda827x_addr,
+			   priv->i2c_props.adap, &tda829x_tda18271_config);
+	} else {
+		if ((data & 0x3c) == 0)
+			priv->ver |= TDA8275;
+		else
+			priv->ver |= TDA8275A;
+
+		dvb_attach(tda827x_attach, fe, priv->tda827x_addr,
+			   priv->i2c_props.adap, &priv->cfg);
+		priv->cfg.switch_addr = priv->i2c_props.addr;
+	}
+	if (fe->ops.tuner_ops.init)
+		fe->ops.tuner_ops.init(fe);
+
+	if (fe->ops.tuner_ops.sleep)
+		fe->ops.tuner_ops.sleep(fe);
+
+	if (fe->ops.analog_ops.i2c_gate_ctrl)
+		fe->ops.analog_ops.i2c_gate_ctrl(fe, 0);
+
+	return 0;
+}
+
+static int tda8290_probe(struct tuner_i2c_props *i2c_props)
+{
+#define TDA8290_ID 0x89
+	u8 reg = 0x1f, id;
+	struct i2c_msg msg_read[] = {
+		{ .addr = i2c_props->addr, .flags = 0, .len = 1, .buf = &reg },
+		{ .addr = i2c_props->addr, .flags = I2C_M_RD, .len = 1, .buf = &id },
+	};
+
+	/* detect tda8290 */
+	if (i2c_transfer(i2c_props->adap, msg_read, 2) != 2) {
+		printk(KERN_WARNING "%s: couldn't read register 0x%02x\n",
+			       __func__, reg);
+		return -ENODEV;
+	}
+
+	if (id == TDA8290_ID) {
+		if (debug)
+			printk(KERN_DEBUG "%s: tda8290 detected @ %d-%04x\n",
+			       __func__, i2c_adapter_id(i2c_props->adap),
+			       i2c_props->addr);
+		return 0;
+	}
+	return -ENODEV;
+}
+
+static int tda8295_probe(struct tuner_i2c_props *i2c_props)
+{
+#define TDA8295_ID 0x8a
+#define TDA8295C2_ID 0x8b
+	u8 reg = 0x2f, id;
+	struct i2c_msg msg_read[] = {
+		{ .addr = i2c_props->addr, .flags = 0, .len = 1, .buf = &reg },
+		{ .addr = i2c_props->addr, .flags = I2C_M_RD, .len = 1, .buf = &id },
+	};
+
+	/* detect tda8295 */
+	if (i2c_transfer(i2c_props->adap, msg_read, 2) != 2) {
+		printk(KERN_WARNING "%s: couldn't read register 0x%02x\n",
+			       __func__, reg);
+		return -ENODEV;
+	}
+
+	if ((id & 0xfe) == TDA8295_ID) {
+		if (debug)
+			printk(KERN_DEBUG "%s: %s detected @ %d-%04x\n",
+			       __func__, (id == TDA8295_ID) ?
+			       "tda8295c1" : "tda8295c2",
+			       i2c_adapter_id(i2c_props->adap),
+			       i2c_props->addr);
+		return 0;
+	}
+
+	return -ENODEV;
+}
+
+static const struct analog_demod_ops tda8290_ops = {
+	.set_params     = tda8290_set_params,
+	.has_signal     = tda8290_has_signal,
+	.standby        = tda8290_standby,
+	.release        = tda829x_release,
+	.i2c_gate_ctrl  = tda8290_i2c_bridge,
+};
+
+static const struct analog_demod_ops tda8295_ops = {
+	.set_params     = tda8295_set_params,
+	.has_signal     = tda8295_has_signal,
+	.standby        = tda8295_standby,
+	.release        = tda829x_release,
+	.i2c_gate_ctrl  = tda8295_i2c_bridge,
+};
+
+struct dvb_frontend *tda829x_attach(struct dvb_frontend *fe,
+				    struct i2c_adapter *i2c_adap, u8 i2c_addr,
+				    struct tda829x_config *cfg)
+{
+	struct tda8290_priv *priv = NULL;
+	char *name;
+
+	priv = kzalloc(sizeof(struct tda8290_priv), GFP_KERNEL);
+	if (priv == NULL)
+		return NULL;
+	fe->analog_demod_priv = priv;
+
+	priv->i2c_props.addr     = i2c_addr;
+	priv->i2c_props.adap     = i2c_adap;
+	priv->i2c_props.name     = "tda829x";
+	if (cfg) {
+		priv->cfg.config = cfg->lna_cfg;
+		priv->tda18271_std_map = cfg->tda18271_std_map;
+	}
+
+	if (tda8290_probe(&priv->i2c_props) == 0) {
+		priv->ver = TDA8290;
+		memcpy(&fe->ops.analog_ops, &tda8290_ops,
+		       sizeof(struct analog_demod_ops));
+	}
+
+	if (tda8295_probe(&priv->i2c_props) == 0) {
+		priv->ver = TDA8295;
+		memcpy(&fe->ops.analog_ops, &tda8295_ops,
+		       sizeof(struct analog_demod_ops));
+	}
+
+	if (cfg && cfg->no_i2c_gate)
+		fe->ops.analog_ops.i2c_gate_ctrl = NULL;
+
+	if (!(cfg) || (TDA829X_PROBE_TUNER == cfg->probe_tuner)) {
+		tda8295_power(fe, 1);
+		if (tda829x_find_tuner(fe) < 0)
+			goto fail;
+	}
+
+	switch (priv->ver) {
+	case TDA8290:
+		name = "tda8290";
+		break;
+	case TDA8295:
+		name = "tda8295";
+		break;
+	case TDA8290 | TDA8275:
+		name = "tda8290+75";
+		break;
+	case TDA8295 | TDA8275:
+		name = "tda8295+75";
+		break;
+	case TDA8290 | TDA8275A:
+		name = "tda8290+75a";
+		break;
+	case TDA8295 | TDA8275A:
+		name = "tda8295+75a";
+		break;
+	case TDA8290 | TDA18271:
+		name = "tda8290+18271";
+		break;
+	case TDA8295 | TDA18271:
+		name = "tda8295+18271";
+		break;
+	default:
+		goto fail;
+	}
+	tuner_info("type set to %s\n", name);
+
+	fe->ops.analog_ops.info.name = name;
+
+	if (priv->ver & TDA8290) {
+		if (priv->ver & (TDA8275 | TDA8275A))
+			tda8290_init_tuner(fe);
+		tda8290_init_if(fe);
+	} else if (priv->ver & TDA8295)
+		tda8295_init_if(fe);
+
+	return fe;
+
+fail:
+	memset(&fe->ops.analog_ops, 0, sizeof(struct analog_demod_ops));
+
+	tda829x_release(fe);
+	return NULL;
+}
+EXPORT_SYMBOL_GPL(tda829x_attach);
+
+int tda829x_probe(struct i2c_adapter *i2c_adap, u8 i2c_addr)
+{
+	struct tuner_i2c_props i2c_props = {
+		.adap = i2c_adap,
+		.addr = i2c_addr,
+	};
+
+	static unsigned char soft_reset[]   = { 0x00, 0x00 };
+	static unsigned char easy_mode_b[]  = { 0x01, 0x02 };
+	static unsigned char easy_mode_g[]  = { 0x01, 0x04 };
+	static unsigned char restore_9886[] = { 0x00, 0xd6, 0x30 };
+	static unsigned char addr_dto_lsb = 0x07;
+	unsigned char data;
+#define PROBE_BUFFER_SIZE 8
+	unsigned char buf[PROBE_BUFFER_SIZE];
+	int i;
+
+	/* rule out tda9887, which would return the same byte repeatedly */
+	tuner_i2c_xfer_send_recv(&i2c_props,
+				 soft_reset, 1, buf, PROBE_BUFFER_SIZE);
+	for (i = 1; i < PROBE_BUFFER_SIZE; i++) {
+		if (buf[i] != buf[0])
+			break;
+	}
+
+	/* all bytes are equal, not a tda829x - probably a tda9887 */
+	if (i == PROBE_BUFFER_SIZE)
+		return -ENODEV;
+
+	if ((tda8290_probe(&i2c_props) == 0) ||
+	    (tda8295_probe(&i2c_props) == 0))
+		return 0;
+
+	/* fall back to old probing method */
+	tuner_i2c_xfer_send(&i2c_props, easy_mode_b, 2);
+	tuner_i2c_xfer_send(&i2c_props, soft_reset, 2);
+	tuner_i2c_xfer_send_recv(&i2c_props, &addr_dto_lsb, 1, &data, 1);
+	if (data == 0) {
+		tuner_i2c_xfer_send(&i2c_props, easy_mode_g, 2);
+		tuner_i2c_xfer_send(&i2c_props, soft_reset, 2);
+		tuner_i2c_xfer_send_recv(&i2c_props,
+					 &addr_dto_lsb, 1, &data, 1);
+		if (data == 0x7b) {
+			return 0;
+		}
+	}
+	tuner_i2c_xfer_send(&i2c_props, restore_9886, 3);
+	return -ENODEV;
+}
+EXPORT_SYMBOL_GPL(tda829x_probe);
+
+MODULE_DESCRIPTION("Philips/NXP TDA8290/TDA8295 analog IF demodulator driver");
+MODULE_AUTHOR("Gerd Knorr, Hartmut Hackmann, Michael Krufky");
+MODULE_LICENSE("GPL");