[media] Sony CXD2820R DVB-T/T2/C demodulator driver

It is very first DVB-T2 Linux driver!

Signed-off-by: Antti Palosaari <crope@iki.fi>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

8 files changed, 2294 insertions, 0 deletions

diff --git a/drivers/media/dvb/frontends/Kconfig b/drivers/media/dvb/frontends/Kconfig
index 7ceb02d95ec..44b816f2601 100644
--- a/drivers/media/dvb/frontends/Kconfig
+++ b/drivers/media/dvb/frontends/Kconfig
@@ -383,6 +383,13 @@ config DVB_STV0367
 	help
 	  A DVB-T/C tuner module. Say Y when you want to support this frontend.
 
+config DVB_CXD2820R
+	tristate "Sony CXD2820R"
+	depends on DVB_CORE && I2C
+	default m if DVB_FE_CUSTOMISE
+	help
+	  Say Y when you want to support this frontend.
+
 comment "DVB-C (cable) frontends"
 	depends on DVB_CORE
 
diff --git a/drivers/media/dvb/frontends/Makefile b/drivers/media/dvb/frontends/Makefile
index 6d519293588..adec1a3f629 100644
--- a/drivers/media/dvb/frontends/Makefile
+++ b/drivers/media/dvb/frontends/Makefile
@@ -86,3 +86,5 @@ obj-$(CONFIG_DVB_MB86A16) += mb86a16.o
 obj-$(CONFIG_DVB_MB86A20S) += mb86a20s.o
 obj-$(CONFIG_DVB_IX2505V) += ix2505v.o
 obj-$(CONFIG_DVB_STV0367) += stv0367.o
+obj-$(CONFIG_DVB_CXD2820R) += cxd2820r.o
+
diff --git a/drivers/media/dvb/frontends/cxd2820r.c b/drivers/media/dvb/frontends/cxd2820r.c
new file mode 100644
index 00000000000..b58f92c7511
--- /dev/null
+++ b/drivers/media/dvb/frontends/cxd2820r.c
@@ -0,0 +1,886 @@
+/*
+ * Sony CXD2820R demodulator driver
+ *
+ * Copyright (C) 2010 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 "cxd2820r_priv.h"
+
+int cxd2820r_debug;
+module_param_named(debug, cxd2820r_debug, int, 0644);
+MODULE_PARM_DESC(debug, "Turn on/off frontend debugging (default:off).");
+
+/* TODO: temporary hack, will be removed later when there is app support */
+unsigned int cxd2820r_dvbt2_freq[5];
+int cxd2820r_dvbt2_count;
+module_param_array_named(dvbt2_freq, cxd2820r_dvbt2_freq, int,
+	&cxd2820r_dvbt2_count, 0644);
+MODULE_PARM_DESC(dvbt2_freq, "RF frequencies forced to DVB-T2 (unit Hz)");
+
+/* write multiple registers */
+static int cxd2820r_wr_regs_i2c(struct cxd2820r_priv *priv, u8 i2c, u8 reg,
+	u8 *val, int len)
+{
+	int ret;
+	u8 buf[len+1];
+	struct i2c_msg msg[1] = {
+		{
+			.addr = i2c,
+			.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 cxd2820r_rd_regs_i2c(struct cxd2820r_priv *priv, u8 i2c, u8 reg,
+	u8 *val, int len)
+{
+	int ret;
+	u8 buf[len];
+	struct i2c_msg msg[2] = {
+		{
+			.addr = i2c,
+			.flags = 0,
+			.len = 1,
+			.buf = &reg,
+		}, {
+			.addr = i2c,
+			.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 multiple registers */
+static int cxd2820r_wr_regs(struct cxd2820r_priv *priv, u32 reginfo, u8 *val,
+	int len)
+{
+	int ret;
+	u8 i2c_addr;
+	u8 reg = (reginfo >> 0) & 0xff;
+	u8 bank = (reginfo >> 8) & 0xff;
+	u8 i2c = (reginfo >> 16) & 0x01;
+
+	/* select I2C */
+	if (i2c)
+		i2c_addr = priv->cfg.i2c_address | (1 << 1); /* DVB-C */
+	else
+		i2c_addr = priv->cfg.i2c_address; /* DVB-T/T2 */
+
+	/* switch bank if needed */
+	if (bank != priv->bank[i2c]) {
+		ret = cxd2820r_wr_regs_i2c(priv, i2c_addr, 0x00, &bank, 1);
+		if (ret)
+			return ret;
+		priv->bank[i2c] = bank;
+	}
+	return cxd2820r_wr_regs_i2c(priv, i2c_addr, reg, val, len);
+}
+
+/* read multiple registers */
+static int cxd2820r_rd_regs(struct cxd2820r_priv *priv, u32 reginfo, u8 *val,
+	int len)
+{
+	int ret;
+	u8 i2c_addr;
+	u8 reg = (reginfo >> 0) & 0xff;
+	u8 bank = (reginfo >> 8) & 0xff;
+	u8 i2c = (reginfo >> 16) & 0x01;
+
+	/* select I2C */
+	if (i2c)
+		i2c_addr = priv->cfg.i2c_address | (1 << 1); /* DVB-C */
+	else
+		i2c_addr = priv->cfg.i2c_address; /* DVB-T/T2 */
+
+	/* switch bank if needed */
+	if (bank != priv->bank[i2c]) {
+		ret = cxd2820r_wr_regs_i2c(priv, i2c_addr, 0x00, &bank, 1);
+		if (ret)
+			return ret;
+		priv->bank[i2c] = bank;
+	}
+	return cxd2820r_rd_regs_i2c(priv, i2c_addr, reg, val, len);
+}
+
+/* write single register */
+static int cxd2820r_wr_reg(struct cxd2820r_priv *priv, u32 reg, u8 val)
+{
+	return cxd2820r_wr_regs(priv, reg, &val, 1);
+}
+
+/* read single register */
+static int cxd2820r_rd_reg(struct cxd2820r_priv *priv, u32 reg, u8 *val)
+{
+	return cxd2820r_rd_regs(priv, reg, val, 1);
+}
+
+/* write single register with mask */
+static int cxd2820r_wr_reg_mask(struct cxd2820r_priv *priv, u32 reg, u8 val,
+	u8 mask)
+{
+	int ret;
+	u8 tmp;
+
+	/* no need for read if whole reg is written */
+	if (mask != 0xff) {
+		ret = cxd2820r_rd_reg(priv, reg, &tmp);
+		if (ret)
+			return ret;
+
+		val &= mask;
+		tmp &= ~mask;
+		val |= tmp;
+	}
+
+	return cxd2820r_wr_reg(priv, reg, val);
+}
+
+static int cxd2820r_gpio(struct dvb_frontend *fe)
+{
+	struct cxd2820r_priv *priv = fe->demodulator_priv;
+	int ret, i;
+	u8 *gpio, tmp0, tmp1;
+	dbg("%s: delsys=%d", __func__, fe->dtv_property_cache.delivery_system);
+
+	switch (fe->dtv_property_cache.delivery_system) {
+	case SYS_DVBT:
+		gpio = priv->cfg.gpio_dvbt;
+		break;
+	case SYS_DVBT2:
+		gpio = priv->cfg.gpio_dvbt2;
+		break;
+	case SYS_DVBC_ANNEX_AC:
+		gpio = priv->cfg.gpio_dvbc;
+		break;
+	default:
+		ret = -EINVAL;
+		goto error;
+	}
+
+	/* update GPIOs only when needed */
+	if (!memcmp(gpio, priv->gpio, sizeof(priv->gpio)))
+		return 0;
+
+	tmp0 = 0x00;
+	tmp1 = 0x00;
+	for (i = 0; i < sizeof(priv->gpio); i++) {
+		/* enable / disable */
+		if (gpio[i] & CXD2820R_GPIO_E)
+			tmp0 |= (2 << 6) >> (2 * i);
+		else
+			tmp0 |= (1 << 6) >> (2 * i);
+
+		/* input / output */
+		if (gpio[i] & CXD2820R_GPIO_I)
+			tmp1 |= (1 << (3 + i));
+		else
+			tmp1 |= (0 << (3 + i));
+
+		/* high / low */
+		if (gpio[i] & CXD2820R_GPIO_H)
+			tmp1 |= (1 << (0 + i));
+		else
+			tmp1 |= (0 << (0 + i));
+
+		dbg("%s: GPIO i=%d %02x %02x", __func__, i, tmp0, tmp1);
+	}
+
+	dbg("%s: wr gpio=%02x %02x", __func__, tmp0, tmp1);
+
+	/* write bits [7:2] */
+	ret = cxd2820r_wr_reg_mask(priv, 0x00089, tmp0, 0xfc);
+	if (ret)
+		goto error;
+
+	/* write bits [5:0] */
+	ret = cxd2820r_wr_reg_mask(priv, 0x0008e, tmp1, 0x3f);
+	if (ret)
+		goto error;
+
+	memcpy(priv->gpio, gpio, sizeof(priv->gpio));
+
+	return ret;
+error:
+	dbg("%s: failed:%d", __func__, ret);
+	return ret;
+}
+
+/* lock FE */
+static int cxd2820r_lock(struct cxd2820r_priv *priv, int active_fe)
+{
+	int ret = 0;
+	dbg("%s: active_fe=%d", __func__, active_fe);
+
+	mutex_lock(&priv->fe_lock);
+
+	/* -1=NONE, 0=DVB-T/T2, 1=DVB-C */
+	if (priv->active_fe == active_fe)
+		;
+	else if (priv->active_fe == -1)
+		priv->active_fe = active_fe;
+	else
+		ret = -EBUSY;
+
+	mutex_unlock(&priv->fe_lock);
+
+	return ret;
+}
+
+/* unlock FE */
+static void cxd2820r_unlock(struct cxd2820r_priv *priv, int active_fe)
+{
+	dbg("%s: active_fe=%d", __func__, active_fe);
+
+	mutex_lock(&priv->fe_lock);
+
+	/* -1=NONE, 0=DVB-T/T2, 1=DVB-C */
+	if (priv->active_fe == active_fe)
+		priv->active_fe = -1;
+
+	mutex_unlock(&priv->fe_lock);
+
+	return;
+}
+
+/* 64 bit div with round closest, like DIV_ROUND_CLOSEST but 64 bit */
+static u32 cxd2820r_div_u64_round_closest(u64 dividend, u32 divisor)
+{
+	return div_u64(dividend + (divisor / 2), divisor);
+}
+
+/* TODO: ... */
+#include "cxd2820r_t.c"
+#include "cxd2820r_c.c"
+#include "cxd2820r_t2.c"
+
+static int cxd2820r_set_frontend(struct dvb_frontend *fe,
+	struct dvb_frontend_parameters *p)
+{
+	struct cxd2820r_priv *priv = fe->demodulator_priv;
+	struct dtv_frontend_properties *c = &fe->dtv_property_cache;
+	int ret;
+	dbg("%s: delsys=%d", __func__, fe->dtv_property_cache.delivery_system);
+
+	if (fe->ops.info.type == FE_OFDM) {
+		/* DVB-T/T2 */
+		ret = cxd2820r_lock(priv, 0);
+		if (ret)
+			return ret;
+
+		switch (priv->delivery_system) {
+		case SYS_UNDEFINED:
+			if (c->delivery_system == SYS_DVBT) {
+				/* SLEEP => DVB-T */
+				ret = cxd2820r_set_frontend_t(fe, p);
+			} else {
+				/* SLEEP => DVB-T2 */
+				ret = cxd2820r_set_frontend_t2(fe, p);
+			}
+			break;
+		case SYS_DVBT:
+			if (c->delivery_system == SYS_DVBT) {
+				/* DVB-T => DVB-T */
+				ret = cxd2820r_set_frontend_t(fe, p);
+			} else if (c->delivery_system == SYS_DVBT2) {
+				/* DVB-T => DVB-T2 */
+				ret = cxd2820r_sleep_t(fe);
+				ret = cxd2820r_set_frontend_t2(fe, p);
+			}
+			break;
+		case SYS_DVBT2:
+			if (c->delivery_system == SYS_DVBT2) {
+				/* DVB-T2 => DVB-T2 */
+				ret = cxd2820r_set_frontend_t2(fe, p);
+			} else if (c->delivery_system == SYS_DVBT) {
+				/* DVB-T2 => DVB-T */
+				ret = cxd2820r_sleep_t2(fe);
+				ret = cxd2820r_set_frontend_t(fe, p);
+			}
+			break;
+		default:
+			dbg("%s: error state=%d", __func__,
+				priv->delivery_system);
+			ret = -EINVAL;
+		}
+	} else {
+		/* DVB-C */
+		ret = cxd2820r_lock(priv, 1);
+		if (ret)
+			return ret;
+
+		ret = cxd2820r_set_frontend_c(fe, p);
+	}
+
+	return ret;
+}
+
+static int cxd2820r_read_status(struct dvb_frontend *fe, fe_status_t *status)
+{
+	struct cxd2820r_priv *priv = fe->demodulator_priv;
+	int ret;
+	dbg("%s: delsys=%d", __func__, fe->dtv_property_cache.delivery_system);
+
+	if (fe->ops.info.type == FE_OFDM) {
+		/* DVB-T/T2 */
+		ret = cxd2820r_lock(priv, 0);
+		if (ret)
+			return ret;
+
+		switch (fe->dtv_property_cache.delivery_system) {
+		case SYS_DVBT:
+			ret = cxd2820r_read_status_t(fe, status);
+			break;
+		case SYS_DVBT2:
+			ret = cxd2820r_read_status_t2(fe, status);
+			break;
+		default:
+			ret = -EINVAL;
+		}
+	} else {
+		/* DVB-C */
+		ret = cxd2820r_lock(priv, 1);
+		if (ret)
+			return ret;
+
+		ret = cxd2820r_read_status_c(fe, status);
+	}
+
+	return ret;
+}
+
+static int cxd2820r_get_frontend(struct dvb_frontend *fe,
+	struct dvb_frontend_parameters *p)
+{
+	struct cxd2820r_priv *priv = fe->demodulator_priv;
+	int ret;
+	dbg("%s: delsys=%d", __func__, fe->dtv_property_cache.delivery_system);
+
+	if (fe->ops.info.type == FE_OFDM) {
+		/* DVB-T/T2 */
+		ret = cxd2820r_lock(priv, 0);
+		if (ret)
+			return ret;
+
+		switch (fe->dtv_property_cache.delivery_system) {
+		case SYS_DVBT:
+			ret = cxd2820r_get_frontend_t(fe, p);
+			break;
+		case SYS_DVBT2:
+			ret = cxd2820r_get_frontend_t2(fe, p);
+			break;
+		default:
+			ret = -EINVAL;
+		}
+	} else {
+		/* DVB-C */
+		ret = cxd2820r_lock(priv, 1);
+		if (ret)
+			return ret;
+
+		ret = cxd2820r_get_frontend_c(fe, p);
+	}
+
+	return ret;
+}
+
+static int cxd2820r_read_ber(struct dvb_frontend *fe, u32 *ber)
+{
+	struct cxd2820r_priv *priv = fe->demodulator_priv;
+	int ret;
+	dbg("%s: delsys=%d", __func__, fe->dtv_property_cache.delivery_system);
+
+	if (fe->ops.info.type == FE_OFDM) {
+		/* DVB-T/T2 */
+		ret = cxd2820r_lock(priv, 0);
+		if (ret)
+			return ret;
+
+		switch (fe->dtv_property_cache.delivery_system) {
+		case SYS_DVBT:
+			ret = cxd2820r_read_ber_t(fe, ber);
+			break;
+		case SYS_DVBT2:
+			ret = cxd2820r_read_ber_t2(fe, ber);
+			break;
+		default:
+			ret = -EINVAL;
+		}
+	} else {
+		/* DVB-C */
+		ret = cxd2820r_lock(priv, 1);
+		if (ret)
+			return ret;
+
+		ret = cxd2820r_read_ber_c(fe, ber);
+	}
+
+	return ret;
+}
+
+static int cxd2820r_read_signal_strength(struct dvb_frontend *fe, u16 *strength)
+{
+	struct cxd2820r_priv *priv = fe->demodulator_priv;
+	int ret;
+	dbg("%s: delsys=%d", __func__, fe->dtv_property_cache.delivery_system);
+
+	if (fe->ops.info.type == FE_OFDM) {
+		/* DVB-T/T2 */
+		ret = cxd2820r_lock(priv, 0);
+		if (ret)
+			return ret;
+
+		switch (fe->dtv_property_cache.delivery_system) {
+		case SYS_DVBT:
+			ret = cxd2820r_read_signal_strength_t(fe, strength);
+			break;
+		case SYS_DVBT2:
+			ret = cxd2820r_read_signal_strength_t2(fe, strength);
+			break;
+		default:
+			ret = -EINVAL;
+		}
+	} else {
+		/* DVB-C */
+		ret = cxd2820r_lock(priv, 1);
+		if (ret)
+			return ret;
+
+		ret = cxd2820r_read_signal_strength_c(fe, strength);
+	}
+
+	return ret;
+}
+
+static int cxd2820r_read_snr(struct dvb_frontend *fe, u16 *snr)
+{
+	struct cxd2820r_priv *priv = fe->demodulator_priv;
+	int ret;
+	dbg("%s: delsys=%d", __func__, fe->dtv_property_cache.delivery_system);
+
+	if (fe->ops.info.type == FE_OFDM) {
+		/* DVB-T/T2 */
+		ret = cxd2820r_lock(priv, 0);
+		if (ret)
+			return ret;
+
+		switch (fe->dtv_property_cache.delivery_system) {
+		case SYS_DVBT:
+			ret = cxd2820r_read_snr_t(fe, snr);
+			break;
+		case SYS_DVBT2:
+			ret = cxd2820r_read_snr_t2(fe, snr);
+			break;
+		default:
+			ret = -EINVAL;
+		}
+	} else {
+		/* DVB-C */
+		ret = cxd2820r_lock(priv, 1);
+		if (ret)
+			return ret;
+
+		ret = cxd2820r_read_snr_c(fe, snr);
+	}
+
+	return ret;
+}
+
+static int cxd2820r_read_ucblocks(struct dvb_frontend *fe, u32 *ucblocks)
+{
+	struct cxd2820r_priv *priv = fe->demodulator_priv;
+	int ret;
+	dbg("%s: delsys=%d", __func__, fe->dtv_property_cache.delivery_system);
+
+	if (fe->ops.info.type == FE_OFDM) {
+		/* DVB-T/T2 */
+		ret = cxd2820r_lock(priv, 0);
+		if (ret)
+			return ret;
+
+		switch (fe->dtv_property_cache.delivery_system) {
+		case SYS_DVBT:
+			ret = cxd2820r_read_ucblocks_t(fe, ucblocks);
+			break;
+		case SYS_DVBT2:
+			ret = cxd2820r_read_ucblocks_t2(fe, ucblocks);
+			break;
+		default:
+			ret = -EINVAL;
+		}
+	} else {
+		/* DVB-C */
+		ret = cxd2820r_lock(priv, 1);
+		if (ret)
+			return ret;
+
+		ret = cxd2820r_read_ucblocks_c(fe, ucblocks);
+	}
+
+	return ret;
+}
+
+static int cxd2820r_init(struct dvb_frontend *fe)
+{
+	struct cxd2820r_priv *priv = fe->demodulator_priv;
+	int ret;
+	dbg("%s: delsys=%d", __func__, fe->dtv_property_cache.delivery_system);
+
+	priv->delivery_system = SYS_UNDEFINED;
+	/* delivery system is unknown at that (init) phase */
+
+	if (fe->ops.info.type == FE_OFDM) {
+		/* DVB-T/T2 */
+		ret = cxd2820r_lock(priv, 0);
+		if (ret)
+			return ret;
+
+		ret = cxd2820r_init_t(fe);
+	} else {
+		/* DVB-C */
+		ret = cxd2820r_lock(priv, 1);
+		if (ret)
+			return ret;
+
+		ret = cxd2820r_init_c(fe);
+	}
+
+	return ret;
+}
+
+static int cxd2820r_sleep(struct dvb_frontend *fe)
+{
+	struct cxd2820r_priv *priv = fe->demodulator_priv;
+	int ret;
+	dbg("%s: delsys=%d", __func__, fe->dtv_property_cache.delivery_system);
+
+	if (fe->ops.info.type == FE_OFDM) {
+		/* DVB-T/T2 */
+		ret = cxd2820r_lock(priv, 0);
+		if (ret)
+			return ret;
+
+		switch (fe->dtv_property_cache.delivery_system) {
+		case SYS_DVBT:
+			ret = cxd2820r_sleep_t(fe);
+			break;
+		case SYS_DVBT2:
+			ret = cxd2820r_sleep_t2(fe);
+			break;
+		default:
+			ret = -EINVAL;
+		}
+
+		cxd2820r_unlock(priv, 0);
+	} else {
+		/* DVB-C */
+		ret = cxd2820r_lock(priv, 1);
+		if (ret)
+			return ret;
+
+		ret = cxd2820r_sleep_c(fe);
+
+		cxd2820r_unlock(priv, 1);
+	}
+
+	return ret;
+}
+
+static int cxd2820r_get_tune_settings(struct dvb_frontend *fe,
+	struct dvb_frontend_tune_settings *s)
+{
+	struct cxd2820r_priv *priv = fe->demodulator_priv;
+	int ret, i;
+	unsigned int rf1, rf2;
+	dbg("%s: delsys=%d", __func__, fe->dtv_property_cache.delivery_system);
+
+	if (fe->ops.info.type == FE_OFDM) {
+		/* DVB-T/T2 */
+		ret = cxd2820r_lock(priv, 0);
+		if (ret)
+			return ret;
+
+		/* TODO: hack! This will be removed later when there is better
+		 * app support for DVB-T2... */
+
+		/* Hz => MHz */
+		rf1 = DIV_ROUND_CLOSEST(fe->dtv_property_cache.frequency,
+			1000000);
+		for (i = 0; i < cxd2820r_dvbt2_count; i++) {
+			if (cxd2820r_dvbt2_freq[i] > 100000000) {
+				/* Hz => MHz */
+				rf2 = DIV_ROUND_CLOSEST(cxd2820r_dvbt2_freq[i],
+					1000000);
+			} else if (cxd2820r_dvbt2_freq[i] > 100000) {
+				/* kHz => MHz */
+				rf2 = DIV_ROUND_CLOSEST(cxd2820r_dvbt2_freq[i],
+					1000);
+			} else {
+				rf2 = cxd2820r_dvbt2_freq[i];
+			}
+
+			dbg("%s: rf1=%d rf2=%d", __func__, rf1, rf2);
+
+			if (rf1 == rf2) {
+				dbg("%s: forcing DVB-T2, frequency=%d",
+				__func__, fe->dtv_property_cache.frequency);
+				fe->dtv_property_cache.delivery_system =
+					SYS_DVBT2;
+			}
+		}
+
+		switch (fe->dtv_property_cache.delivery_system) {
+		case SYS_DVBT:
+			ret = cxd2820r_get_tune_settings_t(fe, s);
+			break;
+		case SYS_DVBT2:
+			ret = cxd2820r_get_tune_settings_t2(fe, s);
+			break;
+		default:
+			ret = -EINVAL;
+		}
+	} else {
+		/* DVB-C */
+		ret = cxd2820r_lock(priv, 1);
+		if (ret)
+			return ret;
+
+		ret = cxd2820r_get_tune_settings_c(fe, s);
+	}
+
+	return ret;
+}
+
+static void cxd2820r_release(struct dvb_frontend *fe)
+{
+	struct cxd2820r_priv *priv = fe->demodulator_priv;
+	dbg("%s", __func__);
+
+	if (fe->ops.info.type == FE_OFDM) {
+		i2c_del_adapter(&priv->tuner_i2c_adapter);
+		kfree(priv);
+	}
+
+	return;
+}
+
+static u32 cxd2820r_tuner_i2c_func(struct i2c_adapter *adapter)
+{
+	return I2C_FUNC_I2C;
+}
+
+static int cxd2820r_tuner_i2c_xfer(struct i2c_adapter *i2c_adap,
+	struct i2c_msg msg[], int num)
+{
+	struct cxd2820r_priv *priv = i2c_get_adapdata(i2c_adap);
+	u8 obuf[msg[0].len + 2];
+	struct i2c_msg msg2[2] = {
+		{
+			.addr = priv->cfg.i2c_address,
+			.flags = 0,
+			.len = sizeof(obuf),
+			.buf = obuf,
+		}, {
+			.addr = priv->cfg.i2c_address,
+			.flags = I2C_M_RD,
+			.len = msg[1].len,
+			.buf = msg[1].buf,
+		}
+	};
+
+	obuf[0] = 0x09;
+	obuf[1] = (msg[0].addr << 1);
+	if (num == 2) { /* I2C read */
+		obuf[1] = (msg[0].addr << 1) | I2C_M_RD; /* I2C RD flag */
+		msg2[0].len = sizeof(obuf) - 1; /* maybe HW bug ? */
+	}
+	memcpy(&obuf[2], msg[0].buf, msg[0].len);
+
+	return i2c_transfer(priv->i2c, msg2, num);
+}
+
+static struct i2c_algorithm cxd2820r_tuner_i2c_algo = {
+	.master_xfer   = cxd2820r_tuner_i2c_xfer,
+	.functionality = cxd2820r_tuner_i2c_func,
+};
+
+struct i2c_adapter *cxd2820r_get_tuner_i2c_adapter(struct dvb_frontend *fe)
+{
+	struct cxd2820r_priv *priv = fe->demodulator_priv;
+	return &priv->tuner_i2c_adapter;
+}
+EXPORT_SYMBOL(cxd2820r_get_tuner_i2c_adapter);
+
+static struct dvb_frontend_ops cxd2820r_ops[2];
+
+struct dvb_frontend *cxd2820r_attach(const struct cxd2820r_config *cfg,
+	struct i2c_adapter *i2c, struct dvb_frontend *fe)
+{
+	int ret;
+	struct cxd2820r_priv *priv = NULL;
+	u8 tmp;
+
+	if (fe == NULL) {
+		/* FE0 */
+		/* allocate memory for the internal priv */
+		priv = kzalloc(sizeof(struct cxd2820r_priv), GFP_KERNEL);
+		if (priv == NULL)
+			goto error;
+
+		/* setup the priv */
+		priv->i2c = i2c;
+		memcpy(&priv->cfg, cfg, sizeof(struct cxd2820r_config));
+		mutex_init(&priv->fe_lock);
+
+		priv->active_fe = -1; /* NONE */
+
+		/* check if the demod is there */
+		priv->bank[0] = priv->bank[1] = 0xff;
+		ret = cxd2820r_rd_reg(priv, 0x000fd, &tmp);
+		dbg("%s: chip id=%02x", __func__, tmp);
+		if (ret || tmp != 0xe1)
+			goto error;
+
+		/* create frontends */
+		memcpy(&priv->fe[0].ops, &cxd2820r_ops[0],
+			sizeof(struct dvb_frontend_ops));
+		memcpy(&priv->fe[1].ops, &cxd2820r_ops[1],
+			sizeof(struct dvb_frontend_ops));
+
+		priv->fe[0].demodulator_priv = priv;
+		priv->fe[1].demodulator_priv = priv;
+
+		/* create tuner i2c adapter */
+		strlcpy(priv->tuner_i2c_adapter.name,
+			"CXD2820R tuner I2C adapter",
+			sizeof(priv->tuner_i2c_adapter.name));
+		priv->tuner_i2c_adapter.algo = &cxd2820r_tuner_i2c_algo;
+		priv->tuner_i2c_adapter.algo_data = NULL;
+		i2c_set_adapdata(&priv->tuner_i2c_adapter, priv);
+		if (i2c_add_adapter(&priv->tuner_i2c_adapter) < 0) {
+			err("tuner I2C bus could not be initialized");
+			goto error;
+		}
+
+		return &priv->fe[0];
+
+	} else {
+		/* FE1: FE0 given as pointer, just return FE1 we have
+		 * already created */
+		priv = fe->demodulator_priv;
+		return &priv->fe[1];
+	}
+
+error:
+	kfree(priv);
+	return NULL;
+}
+EXPORT_SYMBOL(cxd2820r_attach);
+
+static struct dvb_frontend_ops cxd2820r_ops[2] = {
+	{
+		/* DVB-T/T2 */
+		.info = {
+			.name = "Sony CXD2820R (DVB-T/T2)",
+			.type = FE_OFDM,
+			.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_FEC_AUTO |
+				FE_CAN_QPSK | FE_CAN_QAM_16 |
+				FE_CAN_QAM_64 | FE_CAN_QAM_AUTO |
+				FE_CAN_TRANSMISSION_MODE_AUTO |
+				FE_CAN_GUARD_INTERVAL_AUTO |
+				FE_CAN_HIERARCHY_AUTO |
+				FE_CAN_MUTE_TS |
+				FE_CAN_2G_MODULATION
+		},
+
+		.release = cxd2820r_release,
+		.init = cxd2820r_init,
+		.sleep = cxd2820r_sleep,
+
+		.get_tune_settings = cxd2820r_get_tune_settings,
+
+		.set_frontend = cxd2820r_set_frontend,
+		.get_frontend = cxd2820r_get_frontend,
+
+		.read_status = cxd2820r_read_status,
+		.read_snr = cxd2820r_read_snr,
+		.read_ber = cxd2820r_read_ber,
+		.read_ucblocks = cxd2820r_read_ucblocks,
+		.read_signal_strength = cxd2820r_read_signal_strength,
+	},
+	{
+		/* DVB-C */
+		.info = {
+			.name = "Sony CXD2820R (DVB-C)",
+			.type = FE_QAM,
+			.caps =
+				FE_CAN_QAM_16 | FE_CAN_QAM_32 | FE_CAN_QAM_64 |
+				FE_CAN_QAM_128 | FE_CAN_QAM_256 |
+				FE_CAN_FEC_AUTO
+		},
+
+		.release = cxd2820r_release,
+		.init = cxd2820r_init,
+		.sleep = cxd2820r_sleep,
+
+		.get_tune_settings = cxd2820r_get_tune_settings,
+
+		.set_frontend = cxd2820r_set_frontend,
+		.get_frontend = cxd2820r_get_frontend,
+
+		.read_status = cxd2820r_read_status,
+		.read_snr = cxd2820r_read_snr,
+		.read_ber = cxd2820r_read_ber,
+		.read_ucblocks = cxd2820r_read_ucblocks,
+		.read_signal_strength = cxd2820r_read_signal_strength,
+	},
+};
+
+
+MODULE_AUTHOR("Antti Palosaari <crope@iki.fi>");
+MODULE_DESCRIPTION("Sony CXD2820R demodulator driver");
+MODULE_LICENSE("GPL");
diff --git a/drivers/media/dvb/frontends/cxd2820r.h b/drivers/media/dvb/frontends/cxd2820r.h
new file mode 100644
index 00000000000..ad17845123d
--- /dev/null
+++ b/drivers/media/dvb/frontends/cxd2820r.h
@@ -0,0 +1,118 @@
+/*
+ * Sony CXD2820R demodulator driver
+ *
+ * Copyright (C) 2010 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 CXD2820R_H
+#define CXD2820R_H
+
+#include <linux/dvb/frontend.h>
+
+#define CXD2820R_GPIO_D (0 << 0) /* disable */
+#define CXD2820R_GPIO_E (1 << 0) /* enable */
+#define CXD2820R_GPIO_O (0 << 1) /* output */
+#define CXD2820R_GPIO_I (1 << 1) /* input */
+#define CXD2820R_GPIO_L (0 << 2) /* output low */
+#define CXD2820R_GPIO_H (1 << 2) /* output high */
+
+#define CXD2820R_TS_SERIAL        0x08
+#define CXD2820R_TS_SERIAL_MSB    0x28
+#define CXD2820R_TS_PARALLEL      0x30
+#define CXD2820R_TS_PARALLEL_MSB  0x70
+
+struct cxd2820r_config {
+	/* Demodulator I2C address.
+	 * Driver determines DVB-C slave I2C address automatically from master
+	 * address.
+	 * Default: none, must set
+	 * Values: 0x6c, 0x6d
+	 */
+	u8 i2c_address;
+
+	/* TS output mode.
+	 * Default: none, must set.
+	 * Values:
+	 */
+	u8 ts_mode;
+
+	/* IF AGC polarity.
+	 * Default: 0
+	 * Values: 0, 1
+	 */
+	int if_agc_polarity:1;
+
+	/* Spectrum inversion.
+	 * Default: 0
+	 * Values: 0, 1
+	 */
+	int spec_inv:1;
+
+	/* IFs for all used modes.
+	 * Default: none, must set
+	 * Values: <kHz>
+	 */
+	u16 if_dvbt_6;
+	u16 if_dvbt_7;
+	u16 if_dvbt_8;
+	u16 if_dvbt2_5;
+	u16 if_dvbt2_6;
+	u16 if_dvbt2_7;
+	u16 if_dvbt2_8;
+	u16 if_dvbc;
+
+	/* GPIOs for all used modes.
+	 * Default: none, disabled
+	 * Values: <see above>
+	 */
+	u8 gpio_dvbt[3];
+	u8 gpio_dvbt2[3];
+	u8 gpio_dvbc[3];
+};
+
+
+#if defined(CONFIG_DVB_CXD2820R) || \
+	(defined(CONFIG_DVB_CXD2820R_MODULE) && defined(MODULE))
+extern struct dvb_frontend *cxd2820r_attach(
+	const struct cxd2820r_config *config,
+	struct i2c_adapter *i2c,
+	struct dvb_frontend *fe
+);
+extern struct i2c_adapter *cxd2820r_get_tuner_i2c_adapter(
+	struct dvb_frontend *fe
+);
+#else
+static inline struct dvb_frontend *cxd2820r_attach(
+	const struct cxd2820r_config *config,
+	struct i2c_adapter *i2c,
+	struct dvb_frontend *fe
+)
+{
+	printk(KERN_WARNING "%s: driver disabled by Kconfig\n", __func__);
+	return NULL;
+}
+static inline struct i2c_adapter *cxd2820r_get_tuner_i2c_adapter(
+	struct dvb_frontend *fe
+)
+{
+	return NULL;
+}
+
+#endif
+
+#endif /* CXD2820R_H */
diff --git a/drivers/media/dvb/frontends/cxd2820r_c.c b/drivers/media/dvb/frontends/cxd2820r_c.c
new file mode 100644
index 00000000000..a94bff94472
--- /dev/null
+++ b/drivers/media/dvb/frontends/cxd2820r_c.c
@@ -0,0 +1,336 @@
+/*
+ * Sony CXD2820R demodulator driver
+ *
+ * Copyright (C) 2010 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.
+ */
+
+
+static int cxd2820r_set_frontend_c(struct dvb_frontend *fe,
+	struct dvb_frontend_parameters *params)
+{
+	struct cxd2820r_priv *priv = fe->demodulator_priv;
+	struct dtv_frontend_properties *c = &fe->dtv_property_cache;
+	int ret, i;
+	u8 buf[2];
+	u16 if_ctl;
+	u64 num;
+	struct reg_val_mask tab[] = {
+		{ 0x00080, 0x01, 0xff },
+		{ 0x00081, 0x05, 0xff },
+		{ 0x00085, 0x07, 0xff },
+		{ 0x00088, 0x01, 0xff },
+
+		{ 0x00082, 0x20, 0x60 },
+		{ 0x1016a, 0x48, 0xff },
+		{ 0x100a5, 0x00, 0x01 },
+		{ 0x10020, 0x06, 0x07 },
+		{ 0x10059, 0x50, 0xff },
+		{ 0x10087, 0x0c, 0x3c },
+		{ 0x1008b, 0x07, 0xff },
+		{ 0x1001f, priv->cfg.if_agc_polarity << 7, 0x80 },
+		{ 0x10070, priv->cfg.ts_mode, 0xff },
+	};
+
+	dbg("%s: RF=%d SR=%d", __func__, c->frequency, c->symbol_rate);
+
+	/* update GPIOs */
+	ret = cxd2820r_gpio(fe);
+	if (ret)
+		goto error;
+
+	/* program tuner */
+	if (fe->ops.tuner_ops.set_params)
+		fe->ops.tuner_ops.set_params(fe, params);
+
+	if (priv->delivery_system !=  SYS_DVBC_ANNEX_AC) {
+		for (i = 0; i < ARRAY_SIZE(tab); i++) {
+			ret = cxd2820r_wr_reg_mask(priv, tab[i].reg,
+				tab[i].val, tab[i].mask);
+			if (ret)
+				goto error;
+		}
+	}
+
+	priv->delivery_system = SYS_DVBC_ANNEX_AC;
+	priv->ber_running = 0; /* tune stops BER counter */
+
+	num = priv->cfg.if_dvbc;
+	num *= 0x4000;
+	if_ctl = cxd2820r_div_u64_round_closest(num, 41000);
+	buf[0] = (if_ctl >> 8) & 0x3f;
+	buf[1] = (if_ctl >> 0) & 0xff;
+
+	ret = cxd2820r_wr_regs(priv, 0x10042, buf, 2);
+	if (ret)
+		goto error;
+
+	ret = cxd2820r_wr_reg(priv, 0x000ff, 0x08);
+	if (ret)
+		goto error;
+
+	ret = cxd2820r_wr_reg(priv, 0x000fe, 0x01);
+	if (ret)
+		goto error;
+
+	return ret;
+error:
+	dbg("%s: failed:%d", __func__, ret);
+	return ret;
+}
+
+static int cxd2820r_get_frontend_c(struct dvb_frontend *fe,
+	struct dvb_frontend_parameters *p)
+{
+	struct cxd2820r_priv *priv = fe->demodulator_priv;
+	struct dtv_frontend_properties *c = &fe->dtv_property_cache;
+	int ret;
+	u8 buf[2];
+
+	ret = cxd2820r_rd_regs(priv, 0x1001a, buf, 2);
+	if (ret)
+		goto error;
+
+	c->symbol_rate = 2500 * ((buf[0] & 0x0f) << 8 | buf[1]);
+
+	ret = cxd2820r_rd_reg(priv, 0x10019, &buf[0]);
+	if (ret)
+		goto error;
+
+	switch ((buf[0] >> 0) & 0x03) {
+	case 0:
+		c->modulation = QAM_16;
+		break;
+	case 1:
+		c->modulation = QAM_32;
+		break;
+	case 2:
+		c->modulation = QAM_64;
+		break;
+	case 3:
+		c->modulation = QAM_128;
+		break;
+	case 4:
+		c->modulation = QAM_256;
+		break;
+	}
+
+	switch ((buf[0] >> 7) & 0x01) {
+	case 0:
+		c-&