[media] NXP TDA18212HN silicon tuner driver (26eb7045) · Commits · jan.koester / Linux

drivers/media/common/tuners/Kconfig

+8 −0

Original line number	Diff line number	Diff line
		@@ -186,4 +186,12 @@ config MEDIA_TUNER_TDA18218
		default m if MEDIA_TUNER_CUSTOMISE
		help
		NXP TDA18218 silicon tuner driver.

		config MEDIA_TUNER_TDA18212
		tristate "NXP TDA18212 silicon tuner"
		depends on VIDEO_MEDIA && I2C
		default m if MEDIA_TUNER_CUSTOMISE
		help
		NXP TDA18212 silicon tuner driver.

		endmenu

drivers/media/common/tuners/Makefile

+1 −0

Original line number	Diff line number	Diff line
		@@ -25,6 +25,7 @@ obj-$(CONFIG_MEDIA_TUNER_MXL5007T) += mxl5007t.o
		obj-$(CONFIG_MEDIA_TUNER_MC44S803) += mc44s803.o
		obj-$(CONFIG_MEDIA_TUNER_MAX2165) += max2165.o
		obj-$(CONFIG_MEDIA_TUNER_TDA18218) += tda18218.o
		obj-$(CONFIG_MEDIA_TUNER_TDA18212) += tda18212.o

		EXTRA_CFLAGS += -Idrivers/media/dvb/dvb-core
		EXTRA_CFLAGS += -Idrivers/media/dvb/frontends

drivers/media/common/tuners/tda18212.c

0 → 100644

+265 −0

Original line number	Diff line number	Diff line
		/*
		* NXP TDA18212HN silicon tuner driver
		*
		* Copyright (C) 2011 Antti Palosaari <crope@iki.fi>
		*
		* 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.,
		* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
		*/

		#include "tda18212_priv.h"

		static int debug;
		module_param(debug, int, 0644);
		MODULE_PARM_DESC(debug, "Turn on/off debugging (default:off).");

		/* write multiple registers */
		static int tda18212_wr_regs(struct tda18212_priv priv, u8 reg, u8 val,
		int len)
		{
		int ret;
		u8 buf[len+1];
		struct i2c_msg msg[1] = {
		{
		.addr = priv->cfg->i2c_address,
		.flags = 0,
		.len = sizeof(buf),
		.buf = buf,
		}
		};

		buf[0] = reg;
		memcpy(&buf[1], val, len);

		ret = i2c_transfer(priv->i2c, msg, 1);
		if (ret == 1) {
		ret = 0;
		} else {
		warn("i2c wr failed ret:%d reg:%02x len:%d", ret, reg, len);
		ret = -EREMOTEIO;
		}
		return ret;
		}

		/* read multiple registers */
		static int tda18212_rd_regs(struct tda18212_priv priv, u8 reg, u8 val,
		int len)
		{
		int ret;
		u8 buf[len];
		struct i2c_msg msg[2] = {
		{
		.addr = priv->cfg->i2c_address,
		.flags = 0,
		.len = 1,
		.buf = &reg,
		}, {
		.addr = priv->cfg->i2c_address,
		.flags = I2C_M_RD,
		.len = sizeof(buf),
		.buf = buf,
		}
		};

		ret = i2c_transfer(priv->i2c, msg, 2);
		if (ret == 2) {
		memcpy(val, buf, len);
		ret = 0;
		} else {
		warn("i2c rd failed ret:%d reg:%02x len:%d", ret, reg, len);
		ret = -EREMOTEIO;
		}

		return ret;
		}

		/* write single register */
		static int tda18212_wr_reg(struct tda18212_priv *priv, u8 reg, u8 val)
		{
		return tda18212_wr_regs(priv, reg, &val, 1);
		}

		/* read single register */
		static int tda18212_rd_reg(struct tda18212_priv priv, u8 reg, u8 val)
		{
		return tda18212_rd_regs(priv, reg, val, 1);
		}

		#if 0 /* keep, useful when developing driver */
		static void tda18212_dump_regs(struct tda18212_priv *priv)
		{
		int i;
		u8 buf[256];

		#define TDA18212_RD_LEN 32
		for (i = 0; i < sizeof(buf); i += TDA18212_RD_LEN)
		tda18212_rd_regs(priv, i, &buf[i], TDA18212_RD_LEN);

		print_hex_dump(KERN_INFO, "", DUMP_PREFIX_OFFSET, 32, 1, buf,
		sizeof(buf), true);

		return;
		}
		#endif

		static int tda18212_set_params(struct dvb_frontend *fe,
		struct dvb_frontend_parameters *p)
		{
		struct tda18212_priv *priv = fe->tuner_priv;
		struct dtv_frontend_properties *c = &fe->dtv_property_cache;
		int ret, i;
		u32 if_khz;
		u8 buf[9];
		static const u8 bw_params[][3] = {
		/* 0f 13 23 */
		{ 0xb3, 0x20, 0x03 }, /* DVB-T 6 MHz */
		{ 0xb3, 0x31, 0x01 }, /* DVB-T 7 MHz */
		{ 0xb3, 0x22, 0x01 }, /* DVB-T 8 MHz */
		{ 0x92, 0x53, 0x03 }, /* DVB-C */
		};

		dbg("%s: delsys=%d RF=%d BW=%d", __func__,
		c->delivery_system, c->frequency, c->bandwidth_hz);

		if (fe->ops.i2c_gate_ctrl)
		fe->ops.i2c_gate_ctrl(fe, 1); /* open I2C-gate */

		switch (c->delivery_system) {
		case SYS_DVBT:
		switch (c->bandwidth_hz) {
		case 6000000:
		if_khz = priv->cfg->if_dvbt_6;
		i = 0;
		break;
		case 7000000:
		if_khz = priv->cfg->if_dvbt_7;
		i = 1;
		break;
		case 8000000:
		if_khz = priv->cfg->if_dvbt_8;
		i = 2;
		break;
		default:
		ret = -EINVAL;
		goto error;
		}
		break;
		case SYS_DVBC_ANNEX_AC:
		if_khz = priv->cfg->if_dvbc;
		i = 3;
		break;
		default:
		ret = -EINVAL;
		goto error;
		}

		ret = tda18212_wr_reg(priv, 0x23, bw_params[i][2]);
		if (ret)
		goto error;

		ret = tda18212_wr_reg(priv, 0x06, 0x00);
		if (ret)
		goto error;

		ret = tda18212_wr_reg(priv, 0x0f, bw_params[i][0]);
		if (ret)
		goto error;

		buf[0] = 0x02;
		buf[1] = bw_params[i][1];
		buf[2] = 0x03; /* default value */
		buf[3] = if_khz / 50;
		buf[4] = ((c->frequency / 1000) >> 16) & 0xff;
		buf[5] = ((c->frequency / 1000) >> 8) & 0xff;
		buf[6] = ((c->frequency / 1000) >> 0) & 0xff;
		buf[7] = 0xc1;
		buf[8] = 0x01;
		ret = tda18212_wr_regs(priv, 0x12, buf, sizeof(buf));
		if (ret)
		goto error;

		exit:
		if (fe->ops.i2c_gate_ctrl)
		fe->ops.i2c_gate_ctrl(fe, 0); /* close I2C-gate */

		return ret;

		error:
		dbg("%s: failed:%d", __func__, ret);
		goto exit;
		}

		static int tda18212_release(struct dvb_frontend *fe)
		{
		kfree(fe->tuner_priv);
		fe->tuner_priv = NULL;
		return 0;
		}

		static const struct dvb_tuner_ops tda18212_tuner_ops = {
		.info = {
		.name = "NXP TDA18212",

		.frequency_min = 48000000,
		.frequency_max = 864000000,
		.frequency_step = 1000,
		},

		.release = tda18212_release,

		.set_params = tda18212_set_params,
		};

		struct dvb_frontend tda18212_attach(struct dvb_frontend fe,
		struct i2c_adapter i2c, struct tda18212_config cfg)
		{
		struct tda18212_priv *priv = NULL;
		int ret;
		u8 val;

		priv = kzalloc(sizeof(struct tda18212_priv), GFP_KERNEL);
		if (priv == NULL)
		return NULL;

		priv->cfg = cfg;
		priv->i2c = i2c;
		fe->tuner_priv = priv;

		if (fe->ops.i2c_gate_ctrl)
		fe->ops.i2c_gate_ctrl(fe, 1); /* open I2C-gate */

		/* check if the tuner is there */
		ret = tda18212_rd_reg(priv, 0x00, &val);

		if (fe->ops.i2c_gate_ctrl)
		fe->ops.i2c_gate_ctrl(fe, 0); /* close I2C-gate */

		dbg("%s: ret:%d chip ID:%02x", __func__, ret, val);
		if (ret \|\| val != 0xc7) {
		kfree(priv);
		return NULL;
		}

		info("NXP TDA18212HN successfully identified.");

		memcpy(&fe->ops.tuner_ops, &tda18212_tuner_ops,
		sizeof(struct dvb_tuner_ops));

		return fe;
		}
		EXPORT_SYMBOL(tda18212_attach);

		MODULE_DESCRIPTION("NXP TDA18212HN silicon tuner driver");
		MODULE_AUTHOR("Antti Palosaari <crope@iki.fi>");
		MODULE_LICENSE("GPL");

drivers/media/common/tuners/tda18212.h

0 → 100644

+48 −0

Original line number	Diff line number	Diff line
		/*
		* NXP TDA18212HN silicon tuner driver
		*
		* Copyright (C) 2011 Antti Palosaari <crope@iki.fi>
		*
		* 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.,
		* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
		*/

		#ifndef TDA18212_H
		#define TDA18212_H

		#include "dvb_frontend.h"

		struct tda18212_config {
		u8 i2c_address;

		u16 if_dvbt_6;
		u16 if_dvbt_7;
		u16 if_dvbt_8;
		u16 if_dvbc;
		};

		#if defined(CONFIG_MEDIA_TUNER_TDA18212) \|\| \
		(defined(CONFIG_MEDIA_TUNER_TDA18212_MODULE) && defined(MODULE))
		extern struct dvb_frontend tda18212_attach(struct dvb_frontend fe,
		struct i2c_adapter i2c, struct tda18212_config cfg);
		#else
		static inline struct dvb_frontend tda18212_attach(struct dvb_frontend fe,
		struct i2c_adapter i2c, struct tda18212_config cfg)
		{
		printk(KERN_WARNING "%s: driver disabled by Kconfig\n", __func__);
		return NULL;
		}
		#endif

		#endif

drivers/media/common/tuners/tda18212_priv.h

0 → 100644

+44 −0

Original line number	Diff line number	Diff line
		/*
		* NXP TDA18212HN silicon tuner driver
		*
		* Copyright (C) 2011 Antti Palosaari <crope@iki.fi>
		*
		* 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.,
		* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
		*/

		#ifndef TDA18212_PRIV_H
		#define TDA18212_PRIV_H

		#include "tda18212.h"

		#define LOG_PREFIX "tda18212"

		#undef dbg
		#define dbg(f, arg...) \
		if (debug) \
		printk(KERN_INFO LOG_PREFIX": " f "\n" , ## arg)
		#undef err
		#define err(f, arg...) printk(KERN_ERR LOG_PREFIX": " f "\n" , ## arg)
		#undef info
		#define info(f, arg...) printk(KERN_INFO LOG_PREFIX": " f "\n" , ## arg)
		#undef warn
		#define warn(f, arg...) printk(KERN_WARNING LOG_PREFIX": " f "\n" , ## arg)

		struct tda18212_priv {
		struct tda18212_config *cfg;
		struct i2c_adapter *i2c;
		};

		#endif