[PATCH v4 07/12] [media] cxd2880: Add top level of the driver

From: <Yasunari.Takiguchi@sony.com>
To: <linux-kernel@vger.kernel.org>, <devicetree@vger.kernel.org>,
	<linux-media@vger.kernel.org>
Cc: <tbird20d@gmail.com>, <frowand.list@gmail.com>,
	Yasunari Takiguchi <Yasunari.Takiguchi@sony.com>,
	Masayuki Yamamoto <Masayuki.Yamamoto@sony.com>,
	Hideki Nozawa <Hideki.Nozawa@sony.com>,
	"Kota Yonezawa" <Kota.Yonezawa@sony.com>,
	Toshihiko Matsumoto <Toshihiko.Matsumoto@sony.com>,
	Satoshi Watanabe <Satoshi.C.Watanabe@sony.com>
Subject: [PATCH v4 07/12] [media] cxd2880: Add top level of the driver
Date: Fri, 13 Oct 2017 15:09:34 +0900	[thread overview]
Message-ID: <20171013060934.21612-1-Yasunari.Takiguchi@sony.com> (raw)
In-Reply-To: <20171013054635.20946-1-Yasunari.Takiguchi@sony.com>

From: Yasunari Takiguchi <Yasunari.Takiguchi@sony.com>

This provides the main dvb frontend operation functions
for the Sony CXD2880 DVB-T2/T tuner + demodulator driver.

Signed-off-by: Yasunari Takiguchi <Yasunari.Takiguchi@sony.com>
Signed-off-by: Masayuki Yamamoto <Masayuki.Yamamoto@sony.com>
Signed-off-by: Hideki Nozawa <Hideki.Nozawa@sony.com>
Signed-off-by: Kota Yonezawa <Kota.Yonezawa@sony.com>
Signed-off-by: Toshihiko Matsumoto <Toshihiko.Matsumoto@sony.com>
Signed-off-by: Satoshi Watanabe <Satoshi.C.Watanabe@sony.com>
---

[Change list]
Changes in V4
   drivers/media/dvb-frontends/cxd2880/cxd2880_top.c
      -modified typo "inavlid" to "invalid" at pr_err
      -removed unnecessary initialization at variable declaration
      -removed unnecessary brace {}
      -changed to use cxd2880_dvbt_tune and cxd2880_dvbt2_tune 
       instead of cxd2880_integ_dvbt_tune and cxd2880_integ_dvbt2_tune
       (because we changed it so that demodulator does not 
         wait for locking the signal.) 

Changes in V3
   drivers/media/dvb-frontends/cxd2880/cxd2880_top.c
      -adjusted indent spaces
      -modified debugging code
      -removed unnecessary cast
      -modified return code
      -modified coding style of if() 
      -modified about measurement period of PER/BER.
      -changed hexadecimal code to lower case. 

 drivers/media/dvb-frontends/cxd2880/cxd2880_top.c | 2019 +++++++++++++++++++++
 1 file changed, 2019 insertions(+)
 create mode 100644 drivers/media/dvb-frontends/cxd2880/cxd2880_top.c

diff --git a/drivers/media/dvb-frontends/cxd2880/cxd2880_top.c b/drivers/media/dvb-frontends/cxd2880/cxd2880_top.c
new file mode 100644
index 000000000000..c82aaf0c1597
--- /dev/null
+++ b/drivers/media/dvb-frontends/cxd2880/cxd2880_top.c
@@ -0,0 +1,2019 @@
+/*
+ * cxd2880_top.c
+ * Sony CXD2880 DVB-T2/T tuner + demodulator driver
+ *
+ * Copyright (C) 2016, 2017 Sony Semiconductor Solutions Corporation
+ *
+ * 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; version 2 of the License.
+ *
+ * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
+ * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+ * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, see <http://www.gnu.org/licenses/>.
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": %s: " fmt, __func__
+
+#include <linux/spi/spi.h>
+
+#include "dvb_frontend.h"
+#include "dvb_math.h"
+
+#include "cxd2880.h"
+#include "cxd2880_tnrdmd_mon.h"
+#include "cxd2880_tnrdmd_dvbt2_mon.h"
+#include "cxd2880_tnrdmd_dvbt_mon.h"
+#include "cxd2880_integ.h"
+#include "cxd2880_tnrdmd_dvbt2.h"
+#include "cxd2880_tnrdmd_dvbt.h"
+#include "cxd2880_devio_spi.h"
+#include "cxd2880_spi_device.h"
+#include "cxd2880_tnrdmd_driver_version.h"
+
+struct cxd2880_priv {
+	struct cxd2880_tnrdmd tnrdmd;
+	struct spi_device *spi;
+	struct cxd2880_io regio;
+	struct cxd2880_spi_device spi_device;
+	struct cxd2880_spi cxd2880_spi;
+	struct cxd2880_dvbt_tune_param dvbt_tune_param;
+	struct cxd2880_dvbt2_tune_param dvbt2_tune_param;
+	struct mutex *spi_mutex; /* For SPI access exclusive control */
+	unsigned long pre_ber_update;
+	unsigned long pre_ber_interval;
+	unsigned long post_ber_update;
+	unsigned long post_ber_interval;
+	unsigned long ucblock_update;
+	unsigned long ucblock_interval;
+	enum fe_status s;
+};
+
+static int cxd2880_pre_bit_err_t(
+		struct cxd2880_tnrdmd *tnrdmd, u32 *pre_bit_err,
+		u32 *pre_bit_count)
+{
+	u8 rdata[2];
+	int ret;
+
+	if ((!tnrdmd) || (!pre_bit_err) || (!pre_bit_count))
+		return -EINVAL;
+
+	if (tnrdmd->diver_mode == CXD2880_TNRDMD_DIVERMODE_SUB)
+		return -EINVAL;
+
+	if (tnrdmd->state != CXD2880_TNRDMD_STATE_ACTIVE)
+		return -EPERM;
+
+	if (tnrdmd->sys != CXD2880_DTV_SYS_DVBT)
+		return -EPERM;
+
+	ret = slvt_freeze_reg(tnrdmd);
+	if (ret)
+		return ret;
+
+	ret = tnrdmd->io->write_reg(tnrdmd->io,
+				    CXD2880_IO_TGT_DMD,
+				    0x00, 0x10);
+	if (ret) {
+		slvt_unfreeze_reg(tnrdmd);
+		return ret;
+	}
+
+	ret = tnrdmd->io->read_regs(tnrdmd->io,
+				    CXD2880_IO_TGT_DMD,
+				    0x39, rdata, 1);
+	if (ret) {
+		slvt_unfreeze_reg(tnrdmd);
+		return ret;
+	}
+
+	if ((rdata[0] & 0x01) == 0) {
+		slvt_unfreeze_reg(tnrdmd);
+		return -EBUSY;
+	}
+
+	ret = tnrdmd->io->read_regs(tnrdmd->io,
+				    CXD2880_IO_TGT_DMD,
+				    0x22, rdata, 2);
+	if (ret) {
+		slvt_unfreeze_reg(tnrdmd);
+		return ret;
+	}
+
+	*pre_bit_err = (rdata[0] << 8) | rdata[1];
+
+	ret = tnrdmd->io->read_regs(tnrdmd->io,
+				    CXD2880_IO_TGT_DMD,
+				    0x6f, rdata, 1);
+	if (ret) {
+		slvt_unfreeze_reg(tnrdmd);
+		return ret;
+	}
+
+	slvt_unfreeze_reg(tnrdmd);
+
+	*pre_bit_count = ((rdata[0] & 0x07) == 0) ?
+			 256 : (0x1000 << (rdata[0] & 0x07));
+
+	return 0;
+}
+
+static int cxd2880_pre_bit_err_t2(struct cxd2880_tnrdmd *tnrdmd,
+				  u32 *pre_bit_err,
+				  u32 *pre_bit_count)
+{
+	u32 period_exp = 0;
+	u32 n_ldpc = 0;
+	u8 data[5];
+	int ret;
+
+	if ((!tnrdmd) || (!pre_bit_err) || (!pre_bit_count))
+		return -EINVAL;
+
+	if (tnrdmd->diver_mode == CXD2880_TNRDMD_DIVERMODE_SUB)
+		return -EINVAL;
+
+	if (tnrdmd->state != CXD2880_TNRDMD_STATE_ACTIVE)
+		return -EPERM;
+
+	if (tnrdmd->sys != CXD2880_DTV_SYS_DVBT2)
+		return -EPERM;
+
+	ret = slvt_freeze_reg(tnrdmd);
+	if (ret)
+		return ret;
+
+	ret = tnrdmd->io->write_reg(tnrdmd->io,
+				    CXD2880_IO_TGT_DMD,
+				    0x00, 0x0b);
+	if (ret) {
+		slvt_unfreeze_reg(tnrdmd);
+		return ret;
+	}
+
+	ret = tnrdmd->io->read_regs(tnrdmd->io,
+				    CXD2880_IO_TGT_DMD,
+				    0x3c, data, sizeof(data));
+	if (ret) {
+		slvt_unfreeze_reg(tnrdmd);
+		return ret;
+	}
+
+	if (!(data[0] & 0x01)) {
+		slvt_unfreeze_reg(tnrdmd);
+		return -EBUSY;
+	}
+	*pre_bit_err =
+	((data[1] & 0x0f) << 24) | (data[2] << 16) | (data[3] << 8) | data[4];
+
+	ret = tnrdmd->io->read_regs(tnrdmd->io,
+				    CXD2880_IO_TGT_DMD,
+				    0xa0, data, 1);
+	if (ret) {
+		slvt_unfreeze_reg(tnrdmd);
+		return ret;
+	}
+
+	if (((enum cxd2880_dvbt2_plp_fec)(data[0] & 0x03)) ==
+	    CXD2880_DVBT2_FEC_LDPC_16K)
+		n_ldpc = 16200;
+	else
+		n_ldpc = 64800;
+	slvt_unfreeze_reg(tnrdmd);
+
+	ret = tnrdmd->io->write_reg(tnrdmd->io,
+				    CXD2880_IO_TGT_DMD,
+				    0x00, 0x20);
+	if (ret)
+		return ret;
+
+	ret = tnrdmd->io->read_regs(tnrdmd->io,
+				    CXD2880_IO_TGT_DMD,
+				    0x6f, data, 1);
+	if (ret)
+		return ret;
+
+	period_exp = data[0] & 0x0f;
+
+	*pre_bit_count = (1U << period_exp) * n_ldpc;
+
+	return 0;
+}
+
+static int cxd2880_post_bit_err_t(struct cxd2880_tnrdmd *tnrdmd,
+				  u32 *post_bit_err,
+				  u32 *post_bit_count)
+{
+	u8 rdata[3];
+	u32 bit_error = 0;
+	u32 period_exp = 0;
+	int ret;
+
+	if ((!tnrdmd) || (!post_bit_err) || (!post_bit_count))
+		return -EINVAL;
+
+	if (tnrdmd->diver_mode == CXD2880_TNRDMD_DIVERMODE_SUB)
+		return -EINVAL;
+
+	if (tnrdmd->state != CXD2880_TNRDMD_STATE_ACTIVE)
+		return -EPERM;
+
+	if (tnrdmd->sys != CXD2880_DTV_SYS_DVBT)
+		return -EPERM;
+
+	ret = tnrdmd->io->write_reg(tnrdmd->io,
+				    CXD2880_IO_TGT_DMD,
+				    0x00, 0x0d);
+	if (ret)
+		return ret;
+
+	ret = tnrdmd->io->read_regs(tnrdmd->io,
+				    CXD2880_IO_TGT_DMD,
+				    0x15, rdata, 3);
+	if (ret)
+		return ret;
+
+	if ((rdata[0] & 0x40) == 0)
+		return -EBUSY;
+
+	*post_bit_err = ((rdata[0] & 0x3f) << 16) | (rdata[1] << 8) | rdata[2];
+
+	ret = tnrdmd->io->write_reg(tnrdmd->io,
+				    CXD2880_IO_TGT_DMD,
+				    0x00, 0x10);
+	if (ret)
+		return ret;
+
+	ret = tnrdmd->io->read_regs(tnrdmd->io,
+				    CXD2880_IO_TGT_DMD,
+				    0x60, rdata, 1);
+	if (ret)
+		return ret;
+
+	period_exp = (rdata[0] & 0x1f);
+
+	if ((period_exp <= 11) && (bit_error > (1U << period_exp) * 204 * 8))
+		return -EBUSY;
+
+	if (period_exp == 11)
+		*post_bit_count = 3342336;
+	else
+		*post_bit_count = (1U << period_exp) * 204 * 81;
+
+	return 0;
+}
+
+static int cxd2880_post_bit_err_t2(struct cxd2880_tnrdmd *tnrdmd,
+				   u32 *post_bit_err,
+				   u32 *post_bit_count)
+{
+	u32 period_exp = 0;
+	u32 n_bch = 0;
+	u8 data[3];
+	enum cxd2880_dvbt2_plp_fec plp_fec_type =
+		CXD2880_DVBT2_FEC_LDPC_16K;
+	enum cxd2880_dvbt2_plp_code_rate plp_code_rate =
+		CXD2880_DVBT2_R1_2;
+	int ret;
+	static const u16 n_bch_bits_lookup[2][8] = {
+		{7200, 9720, 10800, 11880, 12600, 13320, 5400, 6480},
+		{32400, 38880, 43200, 48600, 51840, 54000, 21600, 25920}
+	};
+
+	if ((!tnrdmd) || (!post_bit_err) || (!post_bit_count))
+		return -EINVAL;
+
+	if (tnrdmd->diver_mode == CXD2880_TNRDMD_DIVERMODE_SUB)
+		return -EINVAL;
+
+	if (tnrdmd->state != CXD2880_TNRDMD_STATE_ACTIVE)
+		return -EPERM;
+
+	if (tnrdmd->sys != CXD2880_DTV_SYS_DVBT2)
+		return -EPERM;
+
+	ret = slvt_freeze_reg(tnrdmd);
+	if (ret)
+		return ret;
+
+	ret = tnrdmd->io->write_reg(tnrdmd->io,
+				    CXD2880_IO_TGT_DMD,
+				    0x00, 0x0b);
+	if (ret) {
+		slvt_unfreeze_reg(tnrdmd);
+		return ret;
+	}
+
+	ret = tnrdmd->io->read_regs(tnrdmd->io,
+				    CXD2880_IO_TGT_DMD,
+				    0x15, data, 3);
+	if (ret) {
+		slvt_unfreeze_reg(tnrdmd);
+		return ret;
+	}
+
+	if (!(data[0] & 0x40)) {
+		slvt_unfreeze_reg(tnrdmd);
+		return -EBUSY;
+	}
+
+	*post_bit_err =
+		((data[0] & 0x3f) << 16) | (data[1] << 8) | data[2];
+
+	ret = tnrdmd->io->read_regs(tnrdmd->io,
+				    CXD2880_IO_TGT_DMD,
+				    0x9d, data, 1);
+	if (ret) {
+		slvt_unfreeze_reg(tnrdmd);
+		return ret;
+	}
+
+	plp_code_rate =
+	(enum cxd2880_dvbt2_plp_code_rate)(data[0] & 0x07);
+
+	ret = tnrdmd->io->read_regs(tnrdmd->io,
+				    CXD2880_IO_TGT_DMD,
+				    0xa0, data, 1);
+	if (ret) {
+		slvt_unfreeze_reg(tnrdmd);
+		return ret;
+	}
+
+	plp_fec_type = (enum cxd2880_dvbt2_plp_fec)(data[0] & 0x03);
+
+	slvt_unfreeze_reg(tnrdmd);
+
+	ret = tnrdmd->io->write_reg(tnrdmd->io,
+				    CXD2880_IO_TGT_DMD,
+				    0x00, 0x20);
+	if (ret)
+		return ret;
+
+	ret = tnrdmd->io->read_regs(tnrdmd->io,
+				    CXD2880_IO_TGT_DMD,
+				    0x72, data, 1);
+	if (ret)
+		return ret;
+
+	period_exp = data[0] & 0x0f;
+
+	if ((plp_fec_type > CXD2880_DVBT2_FEC_LDPC_64K) ||
+	    (plp_code_rate > CXD2880_DVBT2_R2_5))
+		return -EBUSY;
+
+	n_bch = n_bch_bits_lookup[plp_fec_type][plp_code_rate];
+
+	if (*post_bit_err > ((1U << period_exp) * n_bch))
+		return -EBUSY;
+
+	*post_bit_count = (1U << period_exp) * n_bch;
+
+	return 0;
+}
+
+static int cxd2880_read_block_err_t(struct cxd2880_tnrdmd *tnrdmd,
+				    u32 *block_err,
+				    u32 *block_count)
+{
+	u8 rdata[3];
+	int ret;
+
+	if ((!tnrdmd) || (!block_err) || (!block_count))
+		return -EINVAL;
+
+	if (tnrdmd->diver_mode == CXD2880_TNRDMD_DIVERMODE_SUB)
+		return -EINVAL;
+
+	if (tnrdmd->state != CXD2880_TNRDMD_STATE_ACTIVE)
+		return -EPERM;
+
+	if (tnrdmd->sys != CXD2880_DTV_SYS_DVBT)
+		return -EPERM;
+
+	ret = tnrdmd->io->write_reg(tnrdmd->io,
+				    CXD2880_IO_TGT_DMD,
+				    0x00, 0x0d);
+	if (ret)
+		return ret;
+
+	ret = tnrdmd->io->read_regs(tnrdmd->io,
+				    CXD2880_IO_TGT_DMD,
+				    0x18, rdata, 3);
+	if (ret)
+		return ret;
+
+	if ((rdata[0] & 0x01) == 0)
+		return -EBUSY;
+
+	*block_err = (rdata[1] << 8) | rdata[2];
+
+	ret = tnrdmd->io->write_reg(tnrdmd->io,
+				    CXD2880_IO_TGT_DMD,
+				    0x00, 0x10);
+	if (ret)
+		return ret;
+
+	ret = tnrdmd->io->read_regs(tnrdmd->io,
+				    CXD2880_IO_TGT_DMD,
+				    0x5c, rdata, 1);
+	if (ret)
+		return ret;
+
+	*block_count = 1U << (rdata[0] & 0x0f);
+
+	if ((*block_count == 0) || (*block_err > *block_count))
+		return -EBUSY;
+
+	return 0;
+}
+
+static int cxd2880_read_block_err_t2(struct cxd2880_tnrdmd *tnrdmd,
+				     u32 *block_err,
+				     u32 *block_count)
+{
+	u8 rdata[3];
+	int ret;
+
+	if ((!tnrdmd) || (!block_err) || (!block_count))
+		return -EINVAL;
+
+	if (tnrdmd->diver_mode == CXD2880_TNRDMD_DIVERMODE_SUB)
+		return -EINVAL;
+
+	if (tnrdmd->state != CXD2880_TNRDMD_STATE_ACTIVE)
+		return -EPERM;
+	if (tnrdmd->sys != CXD2880_DTV_SYS_DVBT2)
+		return -EPERM;
+
+	ret = tnrdmd->io->write_reg(tnrdmd->io,
+				    CXD2880_IO_TGT_DMD,
+				    0x00, 0x0b);
+	if (ret)
+		return ret;
+
+	ret = tnrdmd->io->read_regs(tnrdmd->io,
+				    CXD2880_IO_TGT_DMD,
+				    0x18, rdata, 3);
+	if (ret)
+		return ret;
+
+	if ((rdata[0] & 0x01) == 0)
+		return -EBUSY;
+
+	*block_err = (rdata[1] << 8) | rdata[2];
+
+	ret = tnrdmd->io->write_reg(tnrdmd->io,
+				    CXD2880_IO_TGT_DMD,
+				    0x00, 0x24);
+	if (ret)
+		return ret;
+
+	ret = tnrdmd->io->read_regs(tnrdmd->io,
+				    CXD2880_IO_TGT_DMD,
+				    0xdc, rdata, 1);
+	if (ret)
+		return ret;
+
+	*block_count = 1U << (rdata[0] & 0x0f);
+
+	if ((*block_count == 0) || (*block_err > *block_count))
+		return -EBUSY;
+
+	return 0;
+}
+
+static void cxd2880_release(struct dvb_frontend *fe)
+{
+	struct cxd2880_priv *priv = NULL;
+
+	if (!fe) {
+		pr_err("invalid arg.\n");
+		return;
+	}
+	priv = fe->demodulator_priv;
+	kfree(priv);
+}
+
+static int cxd2880_init(struct dvb_frontend *fe)
+{
+	int ret;
+	struct cxd2880_priv *priv = NULL;
+	struct cxd2880_tnrdmd_create_param create_param;
+
+	if (!fe) {
+		pr_err("invalid arg.\n");
+		return -EINVAL;
+	}
+
+	priv = fe->demodulator_priv;
+
+	create_param.ts_output_if = CXD2880_TNRDMD_TSOUT_IF_SPI;
+	create_param.xtal_share_type = CXD2880_TNRDMD_XTAL_SHARE_NONE;
+	create_param.en_internal_ldo = 1;
+	create_param.xosc_cap = 18;
+	create_param.xosc_i = 8;
+	create_param.stationary_use = 1;
+
+	mutex_lock(priv->spi_mutex);
+	if (priv->tnrdmd.io != &priv->regio) {
+		ret = cxd2880_tnrdmd_create(&priv->tnrdmd,
+					    &priv->regio, &create_param);
+		if (ret) {
+			mutex_unlock(priv->spi_mutex);
+			pr_info("cxd2880 tnrdmd create failed %d\n", ret);
+			return ret;
+		}
+	}
+	ret = cxd2880_integ_init(&priv->tnrdmd);
+	if (ret) {
+		mutex_unlock(priv->spi_mutex);
+		pr_err("cxd2880 integ init failed %d\n", ret);
+		return ret;
+	}
+	mutex_unlock(priv->spi_mutex);
+
+	pr_debug("OK.\n");
+
+	return ret;
+}
+
+static int cxd2880_sleep(struct dvb_frontend *fe)
+{
+	int ret;
+	struct cxd2880_priv *priv = NULL;
+
+	if (!fe) {
+		pr_err("invalid arg\n");
+		return -EINVAL;
+	}
+
+	priv = fe->demodulator_priv;
+
+	mutex_lock(priv->spi_mutex);
+	ret = cxd2880_tnrdmd_sleep(&priv->tnrdmd);
+	mutex_unlock(priv->spi_mutex);
+
+	pr_debug("tnrdmd_sleep ret %d\n", ret);
+
+	return ret;
+}
+
+static int cxd2880_read_signal_strength(struct dvb_frontend *fe,
+					u16 *strength)
+{
+	int ret;
+	struct cxd2880_priv *priv = NULL;
+	struct dtv_frontend_properties *c = NULL;
+	int level = 0;
+
+	if ((!fe) || (!strength)) {
+		pr_err("invalid arg\n");
+		return -EINVAL;
+	}
+
+	priv = fe->demodulator_priv;
+	c = &fe->dtv_property_cache;
+
+	mutex_lock(priv->spi_mutex);
+	if ((c->delivery_system == SYS_DVBT) ||
+	    (c->delivery_system == SYS_DVBT2)) {
+		ret = cxd2880_tnrdmd_mon_rf_lvl(&priv->tnrdmd, &level);
+	} else {
+		pr_debug("invalid system\n");
+		mutex_unlock(priv->spi_mutex);
+		return -EINVAL;
+	}
+	mutex_unlock(priv->spi_mutex);
+
+	level /= 125;
+	/*
+	 * level should be between -105dBm and -30dBm.
+	 * E.g. they should be between:
+	 * -105000/125 = -840 and -30000/125 = -240
+	 */
+	level = clamp(level, -840, -240);
+	/* scale value to 0x0000-0xffff */
+	*strength = (u16)(((level + 840) * 0xffff) / (-240 + 840));
+
+	if (ret)
+		pr_debug("ret = %d\n", ret);
+
+	return ret;
+}
+
+static int cxd2880_read_snr(struct dvb_frontend *fe, u16 *snr)
+{
+	int ret;
+	int snrvalue = 0;
+	struct cxd2880_priv *priv = NULL;
+	struct dtv_frontend_properties *c = NULL;
+
+	if ((!fe) || (!snr)) {
+		pr_err("invalid arg\n");
+		return -EINVAL;
+	}
+
+	priv = fe->demodulator_priv;
+	c = &fe->dtv_property_cache;
+
+	mutex_lock(priv->spi_mutex);
+	if (c->delivery_system == SYS_DVBT) {
+		ret = cxd2880_tnrdmd_dvbt_mon_snr(&priv->tnrdmd,
+						  &snrvalue);
+	} else if (c->delivery_system == SYS_DVBT2) {
+		ret = cxd2880_tnrdmd_dvbt2_mon_snr(&priv->tnrdmd,
+						   &snrvalue);
+	} else {
+		pr_err("invalid system\n");
+		mutex_unlock(priv->spi_mutex);
+		return -EINVAL;
+	}
+	mutex_unlock(priv->spi_mutex);
+
+	if (snrvalue < 0)
+		snrvalue = 0;
+	*snr = (u16)snrvalue;
+
+	if (ret)
+		pr_debug("ret = %d\n", ret);
+
+	return ret;
+}
+
+static int cxd2880_read_ucblocks(struct dvb_frontend *fe, u32 *ucblocks)
+{
+	int ret;
+	struct cxd2880_priv *priv = NULL;
+	struct dtv_frontend_properties *c = NULL;
+
+	if ((!fe) || (!ucblocks)) {
+		pr_err("invalid arg\n");
+		return -EINVAL;
+	}
+
+	priv = fe->demodulator_priv;
+	c = &fe->dtv_property_cache;
+
+	mutex_lock(priv->spi_mutex);
+	if (c->delivery_system == SYS_DVBT) {
+		ret = cxd2880_tnrdmd_dvbt_mon_packet_error_number(
+								&priv->tnrdmd,
+								ucblocks);
+	} else if (c->delivery_system == SYS_DVBT2) {
+		ret = cxd2880_tnrdmd_dvbt2_mon_packet_error_number(
+								&priv->tnrdmd,
+								ucblocks);
+	} else {
+		pr_err("invalid system\n");
+		mutex_unlock(priv->spi_mutex);
+		return -EINVAL;
+	}
+	mutex_unlock(priv->spi_mutex);
+
+	if (ret)
+		pr_debug("ret = %d\n", ret);
+
+	return ret;
+}
+
+static int cxd2880_read_ber(struct dvb_frontend *fe, u32 *ber)
+{
+	int ret;
+	struct cxd2880_priv *priv = NULL;
+	struct dtv_frontend_properties *c = NULL;
+
+	if ((!fe) || (!ber)) {
+		pr_err("invalid arg\n");
+		return -EINVAL;
+	}
+
+	priv = fe->demodulator_priv;
+	c = &fe->dtv_property_cache;
+
+	mutex_lock(priv->spi_mutex);
+	if (c->delivery_system == SYS_DVBT) {
+		ret = cxd2880_tnrdmd_dvbt_mon_pre_rsber(&priv->tnrdmd,
+							ber);
+		/* x100 to change unit.(10^7 -> 10^9) */
+		*ber *= 100;
+	} else if (c->delivery_system == SYS_DVBT2) {
+		ret = cxd2880_tnrdmd_dvbt2_mon_pre_bchber(&priv->tnrdmd,
+							  ber);
+	} else {
+		pr_err("invalid system\n");
+		mutex_unlock(priv->spi_mutex);
+		return -EINVAL;
+	}
+	mutex_unlock(priv->spi_mutex);
+
+	if (ret)
+		pr_debug("ret = %d\n", ret);
+
+	return ret;
+}
+
+static int cxd2880_set_ber_per_period_t(struct dvb_frontend *fe)
+{
+	int ret;
+	struct dtv_frontend_properties *c;
+	struct cxd2880_priv *priv;
+	struct cxd2880_dvbt_tpsinfo info;
+	enum cxd2880_dtv_bandwidth bw = CXD2880_DTV_BW_1_7_MHZ;
+	u32 pre_ber_rate = 0;
+	u32 post_ber_rate = 0;
+	u32 ucblock_rate = 0;
+	u32 mes_exp = 0;
+	static const int cr_table[5] = {31500, 42000, 47250, 52500, 55125};
+	static const int denominator_tbl[4] = {125664, 129472, 137088, 152320};
+
+	if (!fe) {
+		pr_err("invalid arg\n");
+		return -EINVAL;
+	}
+
+	priv = fe->demodulator_priv;
+	c = &fe->dtv_property_cache;
+	bw = priv->dvbt_tune_param.bandwidth;
+
+	ret = cxd2880_tnrdmd_dvbt_mon_tps_info(&priv->tnrdmd,
+					       &info);
+	if (ret) {
+		pr_err("tps monitor error ret = %d\n", ret);
+		info.hierarchy = CXD2880_DVBT_HIERARCHY_NON;
+		info.constellation = CXD2880_DVBT_CONSTELLATION_QPSK;
+		info.guard = CXD2880_DVBT_GUARD_1_4;
+		info.rate_hp = CXD2880_DVBT_CODERATE_1_2;
+		info.rate_lp = CXD2880_DVBT_CODERATE_1_2;
+	}
+
+	if (info.hierarchy == CXD2880_DVBT_HIERARCHY_NON) {
+		pre_ber_rate = 63000000 * bw * (info.constellation * 2 + 2) /
+			       denominator_tbl[info.guard];
+
+		post_ber_rate =	1000 * cr_table[info.rate_hp] * bw *
+				(info.constellation * 2 + 2) /
+				denominator_tbl[info.guard];
+
+		ucblock_rate = 875 * cr_table[info.rate_hp] * bw *
+			       (info.constellation * 2 + 2) /
+			       denominator_tbl[info.guard];
+	} else {
+		u8 data = 0;
+		struct cxd2880_tnrdmd *tnrdmd = &priv->tnrdmd;
+
+		ret = tnrdmd->io->write_reg(tnrdmd->io,
+					    CXD2880_IO_TGT_DMD,
+					    0x00, 0x10);
+		if (!ret) {
+			ret = tnrdmd->io->read_regs(tnrdmd->io,
+						    CXD2880_IO_TGT_DMD,
+						    0x67, &data, 1);
+			if (ret)
+				data = 0x00;
+		} else {
+			data = 0x00;
+		}
+
+		if (data & 0x01) { /* Low priority */
+			pre_ber_rate =
+				63000000 * bw * (info.constellation * 2 + 2) /
+				denominator_tbl[info.guard];
+
+			post_ber_rate = 1000 * cr_table[info.rate_lp] * bw *
+					(info.constellation * 2 + 2) /
+					denominator_tbl[info.guard];
+
+			ucblock_rate = (1000 * 7 / 8) *	cr_table[info.rate_lp] *
+				       bw * (info.constellation * 2 + 2) /
+				       denominator_tbl[info.guard];
+		} else { /* High priority */
+			pre_ber_rate =
+				63000000 * bw * 2 / denominator_tbl[info.guard];
+
+			post_ber_rate = 1000 * cr_table[info.rate_hp] * bw * 2 /
+					denominator_tbl[info.guard];
+
+			ucblock_rate = (1000 * 7 / 8) * cr_table[info.rate_hp] *
+					bw * 2 / denominator_tbl[info.guard];
+		}
+	}
+
+	mes_exp = pre_ber_rate < 8192 ? 8 : intlog2(pre_ber_rate) >> 24;
+	priv->pre_ber_interval =
+		((1U << mes_exp) * 1000 + (pre_ber_rate / 2)) /
+		pre_ber_rate;
+	cxd2880_tnrdmd_set_cfg(&priv->tnrdmd,
+			       CXD2880_TNRDMD_CFG_DVBT_VBER_PERIOD,
+			       mes_exp == 8 ? 0 : mes_exp - 12);
+
+	mes_exp = intlog2(post_ber_rate) >> 24;
+	priv->post_ber_interval =
+		((1U << mes_exp) * 1000 + (post_ber_rate / 2)) /
+		post_ber_rate;
+	cxd2880_tnrdmd_set_cfg(&priv->tnrdmd,
+			       CXD2880_TNRDMD_CFG_DVBT_BERN_PERIOD,
+			       mes_exp);
+
+	mes_exp = intlog2(ucblock_rate) >> 24;
+	priv->ucblock_interval =
+		((1U << mes_exp) * 1000 + (ucblock_rate / 2)) /
+		ucblock_rate;
+	cxd2880_tnrdmd_set_cfg(&priv->tnrdmd,
+			       CXD2880_TNRDMD_CFG_DVBT_PER_MES,
+			       mes_exp);
+
+	return 0;
+}
+
+static int cxd2880_set_ber_per_period_t2(struct dvb_frontend *fe)
+{
+	int ret;
+	struct dtv_frontend_properties *c;
+	struct cxd2880_priv *priv;
+	struct cxd2880_dvbt2_l1pre l1pre;
+	struct cxd2880_dvbt2_l1post l1post;
+	struct cxd2880_dvbt2_plp plp;
+	struct cxd2880_dvbt2_bbheader bbheader;
+	enum cxd2880_dtv_bandwidth bw = CXD2880_DTV_BW_1_7_MHZ;
+	u32 pre_ber_rate = 0;
+	u32 post_ber_rate = 0;
+	u32 ucblock_rate = 0;
+	u32 mes_exp = 0;
+	u32 term_a = 0;
+	u32 term_b = 0;
+	u32 denominator = 0;
+	static const u32 gi_tbl[7] = {32, 64, 128, 256, 8, 152, 76};
+	static const u8 n_tbl[6] = {8, 2, 4, 16, 1, 1};
+	static const u8 mode_tbl[6] = {2, 8, 4, 1, 16, 32};
+	static const u32 kbch_tbl[2][8] = {
+		{6952, 9472, 10552, 11632, 12352, 13072, 5152, 6232},
+		{32128, 38608, 42960, 48328, 51568, 53760, 0, 0}
+	};
+
+	if (!fe) {
+		pr_err("invalid arg\n");
+		return -EINVAL;
+	}
+
+	priv = fe->demodulator_priv;
+	c = &fe->dtv_property_cache;
+	bw = priv->dvbt2_tune_param.bandwidth;
+
+	ret = cxd2880_tnrdmd_dvbt2_mon_l1_pre(&priv->tnrdmd, &l1pre);
+	if (ret) {
+		pr_info("l1 pre error\n");
+		goto error_ber_setting;
+	}
+
+	ret = cxd2880_tnrdmd_dvbt2_mon_active_plp(&priv->tnrdmd,
+						  CXD2880_DVBT2_PLP_DATA, &plp);
+	if (ret) {
+		pr_info("plp info error\n");
+		goto error_ber_setting;
+	}
+
+	ret = cxd2880_tnrdmd_dvbt2_mon_l1_post(&priv->tnrdmd, &l1post);
+	if (ret) {
+		pr_info("l1 post error\n");
+		goto error_ber_setting;
+	}
+
+	term_a =
+		(mode_tbl[l1pre.fft_mode] * (1024 + gi_tbl[l1pre.gi])) *
+		(l1pre.num_symbols + n_tbl[l1pre.fft_mode]) + 2048;
+
+	if (l1pre.mixed && l1post.fef_intvl) {
+		term_b = (l1post.fef_length + (l1post.fef_intvl / 2)) /
+			 l1post.fef_intvl;
+	} else {
+		term_b = 0;
+	}
+
+	switch (bw) {
+	case CXD2880_DTV_BW_1_7_MHZ:
+		denominator = ((term_a + term_b) * 71 + (131 / 2)) / 131;
+		break;
+	case CXD2880_DTV_BW_5_MHZ:
+		denominator = ((term_a + term_b) * 7 + 20) / 40;
+		break;
+	case CXD2880_DTV_BW_6_MHZ:
+		denominator = ((term_a + term_b) * 7 + 24) / 48;
+		break;
+	case CXD2880_DTV_BW_7_MHZ:
+		denominator = ((term_a + term_b) + 4) / 8;
+		break;
+	case CXD2880_DTV_BW_8_MHZ:
+	default:
+		denominator = ((term_a + term_b) * 7 + 32) / 64;
+		break;
+	}
+
+	if (plp.til_type && plp.til_len) {
+		pre_ber_rate =
+			(plp.num_blocks_max * 1000000 + (denominator / 2)) /
+			denominator;
+		pre_ber_rate = (pre_ber_rate + (plp.til_len / 2)) /
+			       plp.til_len;
+	} else {
+		pre_ber_rate =
+			(plp.num_blocks_max * 1000000 + (denominator / 2)) /
+			denominator;
+	}
+
+	post_ber_rate = pre_ber_rate;
+
+	mes_exp = intlog2(pre_ber_rate) >> 24;
+	priv->pre_ber_interval =
+		((1U << mes_exp) * 1000 + (pre_ber_rate / 2)) /
+		pre_ber_rate;
+	cxd2880_tnrdmd_set_cfg(&priv->tnrdmd,
+			       CXD2880_TNRDMD_CFG_DVBT2_LBER_MES,
+			       mes_exp);
+
+	mes_exp = intlog2(post_ber_rate) >> 24;
+	priv->post_ber_interval =
+		((1U << mes_exp) * 1000 + (post_ber_rate / 2)) /
+		post_ber_rate;
+	cxd2880_tnrdmd_set_cfg(&priv->tnrdmd,
+			       CXD2880_TNRDMD_CFG_DVBT2_BBER_MES,
+			       mes_exp);
+
+	ret = cxd2880_tnrdmd_dvbt2_mon_bbheader(&priv->tnrdmd,
+						CXD2880_DVBT2_PLP_DATA,
+						&bbheader);
+	if (ret) {
+		pr_info("bb header error\n");
+		goto error_ucblock_setting;
+	}
+
+	if (bbheader.plp_mode == CXD2880_DVBT2_PLP_MODE_NM) {
+		if (!bbheader.issy_indicator) {
+			ucblock_rate =
+				(pre_ber_rate * kbch_tbl[plp.fec][plp.plp_cr] +
+				752) / 1504;
+		} else {
+			ucblock_rate =
+				(pre_ber_rate * kbch_tbl[plp.fec][plp.plp_cr] +
+				764) / 1528;
+		}
+	} else if (bbheader.plp_mode == CXD2880_DVBT2_PLP_MODE_HEM) {
+		ucblock_rate =
+			(pre_ber_rate * kbch_tbl[plp.fec][plp.plp_cr] + 748) /
+			1496;
+	} else {
+		pr_info("plp mode is not Normal or HEM\n");
+		goto error_ucblock_setting;
+	}
+
+	mes_exp = intlog2(ucblock_rate) >> 24;
+	priv->ucblock_interval =
+		((1U << mes_exp) * 1000 + (ucblock_rate / 2)) /
+		ucblock_rate;
+	cxd2880_tnrdmd_set_cfg(&priv->tnrdmd,
+			       CXD2880_TNRDMD_CFG_DVBT2_PER_MES,
+			       mes_exp);
+
+	return 0;
+
+error_ber_setting:
+	priv->pre_ber_interval = 1000;
+	cxd2880_tnrdmd_set_cfg(&priv->tnrdmd,
+				     CXD2880_TNRDMD_CFG_DVBT2_LBER_MES, 0);
+
+	priv->post_ber_interval = 1000;
+	cxd2880_tnrdmd_set_cfg(&priv->tnrdmd,
+			       CXD2880_TNRDMD_CFG_DVBT2_BBER_MES, 0);
+
+error_ucblock_setting:
+	priv->ucblock_interval = 1000;
+	cxd2880_tnrdmd_set_cfg(&priv->tnrdmd,
+			       CXD2880_TNRDMD_CFG_DVBT2_PER_MES, 8);
+
+	return 0;
+}
+
+static int cxd2880_dvbt_tune(struct cxd2880_tnrdmd *tnr_dmd,
+			     struct cxd2880_dvbt_tune_param
+			     *tune_param)
+{
+	int ret;
+
+	if ((!tnr_dmd) || (!tune_param))
+		return -EINVAL;
+
+	if (tnr_dmd->diver_mode == CXD2880_TNRDMD_DIVERMODE_SUB)
+		return -EINVAL;
+
+	if ((tnr_dmd->state != CXD2880_TNRDMD_STATE_SLEEP) &&
+	    (tnr_dmd->state != CXD2880_TNRDMD_STATE_ACTIVE))
+		return -EPERM;
+
+	atomic_set(&tnr_dmd->cancel, 0);
+
+	if ((tune_param->bandwidth != CXD2880_DTV_BW_5_MHZ) &&
+	    (tune_param->bandwidth != CXD2880_DTV_BW_6_MHZ) &&
+	    (tune_param->bandwidth != CXD2880_DTV_BW_7_MHZ) &&
+	    (tune_param->bandwidth != CXD2880_DTV_BW_8_MHZ)) {
+		return -EOPNOTSUPP;
+	}
+
+	ret = cxd2880_tnrdmd_dvbt_tune1(tnr_dmd, tune_param);
+	if (ret)
+		return ret;
+
+	usleep_range(CXD2880_TNRDMD_WAIT_AGC_STABLE * 10000,
+		     CXD2880_TNRDMD_WAIT_AGC_STABLE * 10000 + 1000);
+
+	ret = cxd2880_tnrdmd_dvbt_tune2(tnr_dmd, tune_param);
+	if (ret)
+		return ret;
+
+	return 0;
+}
+
+static int cxd2880_dvbt2_tune(struct cxd2880_tnrdmd *tnr_dmd,
+			      struct cxd2880_dvbt2_tune_param
+			      *tune_param)
+{
+	int ret;
+
+	if ((!tnr_dmd) || (!tune_param))
+		return -EINVAL;
+
+	if (tnr_dmd->diver_mode == CXD2880_TNRDMD_DIVERMODE_SUB)
+		return -EINVAL;
+
+	if ((tnr_dmd->state != CXD2880_TNRDMD_STATE_SLEEP) &&
+	    (tnr_dmd->state != CXD2880_TNRDMD_STATE_ACTIVE))
+		return -EPERM;
+
+	atomic_set(&tnr_dmd->cancel, 0);
+
+	if ((tune_param->bandwidth != CXD2880_DTV_BW_1_7_MHZ) &&
+	    (tune_param->bandwidth != CXD2880_DTV_BW_5_MHZ) &&
+	    (tune_param->bandwidth != CXD2880_DTV_BW_6_MHZ) &&
+	    (tune_param->bandwidth != CXD2880_DTV_BW_7_MHZ) &&
+	    (tune_param->bandwidth != CXD2880_DTV_BW_8_MHZ)) {
+		return -EOPNOTSUPP;
+	}
+
+	if ((tune_param->profile != CXD2880_DVBT2_PROFILE_BASE) &&
+	    (tune_param->profile != CXD2880_DVBT2_PROFILE_LITE))
+		return -EINVAL;
+
+	ret = cxd2880_tnrdmd_dvbt2_tune1(tnr_dmd, tune_param);
+	if (ret)
+		return ret;
+
+	usleep_range(CXD2880_TNRDMD_WAIT_AGC_STABLE * 10000,
+		     CXD2880_TNRDMD_WAIT_AGC_STABLE * 10000 + 1000);
+
+	ret = cxd2880_tnrdmd_dvbt2_tune2(tnr_dmd, tune_param);
+	if (ret)
+		return ret;
+
+	return ret;
+}
+
+static int cxd2880_set_frontend(struct dvb_frontend *fe)
+{
+	int ret;
+	struct dtv_frontend_properties *c;
+	struct cxd2880_priv *priv;
+	enum cxd2880_dtv_bandwidth bw = CXD2880_DTV_BW_1_7_MHZ;
+
+	if (!fe) {
+		pr_err("invalid arg\n");
+		return -EINVAL;
+	}
+
+	priv = fe->demodulator_priv;
+	c = &fe->dtv_property_cache;
+
+	c->pre_bit_error.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
+	c->pre_bit_error.stat[0].uvalue = 0;
+	c->pre_bit_error.len = 1;
+	c->pre_bit_count.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
+	c->pre_bit_count.stat[0].uvalue = 0;
+	c->pre_bit_count.len = 1;
+	c->post_bit_error.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
+	c->post_bit_error.stat[0].uvalue = 0;
+	c->post_bit_error.len = 1;
+	c->post_bit_count.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
+	c->post_bit_count.stat[0].uvalue = 0;
+	c->post_bit_count.len = 1;
+	c->block_error.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
+	c->block_error.stat[0].uvalue = 0;
+	c->block_error.len = 1;
+	c->block_count.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
+	c->block_count.stat[0].uvalue = 0;
+	c->block_count.len = 1;
+
+	switch (c->bandwidth_hz) {
+	case 1712000:
+		bw = CXD2880_DTV_BW_1_7_MHZ;
+		break;
+	case 5000000:
+		bw = CXD2880_DTV_BW_5_MHZ;
+		break;
+	case 6000000:
+		bw = CXD2880_DTV_BW_6_MHZ;
+		break;
+	case 7000000:
+		bw = CXD2880_DTV_BW_7_MHZ;
+		break;
+	case 8000000:
+		bw = CXD2880_DTV_BW_8_MHZ;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	priv->s = 0;
+
+	pr_info("sys:%d freq:%d bw:%d\n",
+		c->delivery_system, c->frequency, bw);
+	mutex_lock(priv->spi_mutex);
+	if (c->delivery_system == SYS_DVBT) {
+		priv->tnrdmd.sys = CXD2880_DTV_SYS_DVBT;
+		priv->dvbt_tune_param.center_freq_khz = c->frequency / 1000;
+		priv->dvbt_tune_param.bandwidth = bw;
+		priv->dvbt_tune_param.profile = CXD2880_DVBT_PROFILE_HP;
+		ret = cxd2880_dvbt_tune(&priv->tnrdmd,
+					&priv->dvbt_tune_param);
+	} else if (c->delivery_system == SYS_DVBT2) {
+		priv->tnrdmd.sys = CXD2880_DTV_SYS_DVBT2;
+		priv->dvbt2_tune_param.center_freq_khz = c->frequency / 1000;
+		priv->dvbt2_tune_param.bandwidth = bw;
+		priv->dvbt2_tune_param.data_plp_id = (u16)c->stream_id;
+		priv->dvbt2_tune_param.profile = CXD2880_DVBT2_PROFILE_BASE;
+		ret = cxd2880_dvbt2_tune(&priv->tnrdmd,
+					 &priv->dvbt2_tune_param);
+	} else {
+		pr_err("invalid system\n");
+		mutex_unlock(priv->spi_mutex);
+		return -EINVAL;
+	}
+	mutex_unlock(priv->spi_mutex);
+
+	pr_info("tune result %d\n", ret);
+
+	return ret;
+}
+
+static int cxd2880_get_stats(struct dvb_frontend *fe,
+			     enum fe_status status)
+{
+	struct cxd2880_priv *priv = NULL;
+	struct dtv_frontend_properties *c = NULL;
+	u32 pre_bit_err = 0, pre_bit_count = 0;
+	u32 post_bit_err = 0, post_bit_count = 0;
+	u32 block_err = 0, block_count = 0;
+	int ret;
+
+	if (!fe) {
+		pr_err("invalid arg\n");
+		return -EINVAL;
+	}
+
+	priv = fe->demodulator_priv;
+	c = &fe->dtv_property_cache;
+
+	if (!(status & FE_HAS_LOCK)) {
+		c->pre_bit_error.len = 1;
+		c->pre_bit_error.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
+		c->pre_bit_count.len = 1;
+		c->pre_bit_count.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
+		c->post_bit_error.len = 1;
+		c->post_bit_error.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
+		c->post_bit_count.len = 1;
+		c->post_bit_count.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
+		c->block_error.len = 1;
+		c->block_error.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
+		c->block_count.len = 1;
+		c->block_count.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
+
+		return 0;
+	}
+
+	if (time_after(jiffies, priv->pre_ber_update)) {
+		priv->pre_ber_update =
+			 jiffies + msecs_to_jiffies(priv->pre_ber_interval);
+		if (c->delivery_system == SYS_DVBT) {
+			mutex_lock(priv->spi_mutex);
+			ret = cxd2880_pre_bit_err_t(&priv->tnrdmd,
+						    &pre_bit_err,
+						    &pre_bit_count);
+			mutex_unlock(priv->spi_mutex);
+		} else if (c->delivery_system == SYS_DVBT2) {
+			mutex_lock(priv->spi_mutex);
+			ret = cxd2880_pre_bit_err_t2(&priv->tnrdmd,
+						     &pre_bit_err,
+						     &pre_bit_count);
+			mutex_unlock(priv->spi_mutex);
+		} else {
+			return -EINVAL;
+		}
+
+		if (!ret) {
+			c->pre_bit_error.len = 1;
+			c->pre_bit_error.stat[0].scale = FE_SCALE_COUNTER;
+			c->pre_bit_error.stat[0].uvalue += pre_bit_err;
+			c->pre_bit_count.len = 1;
+			c->pre_bit_count.stat[0].scale = FE_SCALE_COUNTER;
+			c->pre_bit_count.stat[0].uvalue += pre_bit_count;
+		} else {
+			c->pre_bit_error.len = 1;
+			c->pre_bit_error.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
+			c->pre_bit_count.len = 1;
+			c->pre_bit_count.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
+			pr_debug("pre_bit_error_t failed %d\n", ret);
+		}
+	}
+
+	if (time_after(jiffies, priv->post_ber_update)) {
+		priv->post_ber_update =
+			jiffies + msecs_to_jiffies(priv->post_ber_interval);
+		if (c->delivery_system == SYS_DVBT) {
+			mutex_lock(priv->spi_mutex);
+			ret = cxd2880_post_bit_err_t(&priv->tnrdmd,
+						     &post_bit_err,
+						     &post_bit_count);
+			mutex_unlock(priv->spi_mutex);
+		} else if (c->delivery_system == SYS_DVBT2) {
+			mutex_lock(priv->spi_mutex);
+			ret = cxd2880_post_bit_err_t2(&priv->tnrdmd,
+						      &post_bit_err,
+						      &post_bit_count);
+			mutex_unlock(priv->spi_mutex);
+		} else {
+			return -EINVAL;
+		}
+
+		if (!ret) {
+			c->post_bit_error.len = 1;
+			c->post_bit_error.stat[0].scale = FE_SCALE_COUNTER;
+			c->post_bit_error.stat[0].uvalue += post_bit_err;
+			c->post_bit_count.len = 1;
+			c->post_bit_count.stat[0].scale = FE_SCALE_COUNTER;
+			c->post_bit_count.stat[0].uvalue += post_bit_count;
+		} else {
+			c->post_bit_error.len = 1;
+			c->post_bit_error.stat[0].scale =
+							FE_SCALE_NOT_AVAILABLE;
+			c->post_bit_count.len = 1;
+			c->post_bit_count.stat[0].scale =
+							FE_SCALE_NOT_AVAILABLE;
+			pr_debug("post_bit_err_t %d\n", ret);
+		}
+	}
+
+	if (time_after(jiffies, priv->ucblock_update)) {
+		priv->ucblock_update =
+			jiffies + msecs_to_jiffies(priv->ucblock_interval);
+		if (c->delivery_system == SYS_DVBT) {
+			mutex_lock(priv->spi_mutex);
+			ret = cxd2880_read_block_err_t(&priv->tnrdmd,
+						       &block_err,
+						       &block_count);
+			mutex_unlock(priv->spi_mutex);
+		} else if (c->delivery_system == SYS_DVBT2) {
+			mutex_lock(priv->spi_mutex);
+			ret = cxd2880_read_block_err_t2(&priv->tnrdmd,
+							&block_err,
+							&block_count);
+			mutex_unlock(priv->spi_mutex);
+		} else {
+			return -EINVAL;
+		}
+		if (!ret) {
+			c->block_error.len = 1;
+			c->block_error.stat[0].scale = FE_SCALE_COUNTER;
+			c->block_error.stat[0].uvalue += block_err;
+			c->block_count.len = 1;
+			c->block_count.stat[0].scale = FE_SCALE_COUNTER;
+			c->block_count.stat[0].uvalue += block_count;
+		} else {
+			c->block_error.len = 1;
+			c->block_error.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
+			c->block_count.len = 1;
+			c->block_count.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
+			pr_debug("read_block_err_t  %d\n", ret);
+		}
+	}
+
+	return 0;
+}
+
+static int cxd2880_check_l1post_plp(struct dvb_frontend *fe)
+{
+	u8 valid = 0;
+	u8 plp_not_found;
+	int ret;
+	struct cxd2880_priv *priv = NULL;
+
+	if (!fe) {
+		pr_err("invalid arg\n");
+		return -EINVAL;
+	}
+
+	priv = fe->demodulator_priv;
+
+	ret = cxd2880_tnrdmd_dvbt2_check_l1post_valid(&priv->tnrdmd,
+						      &valid);
+	if (ret)
+		return ret;
+
+	if (!valid)
+		return -EAGAIN;
+
+	ret = cxd2880_tnrdmd_dvbt2_mon_data_plp_error(&priv->tnrdmd,
+						      &plp_not_found);
+	if (ret)
+		return ret;
+
+	if (plp_not_found) {
+		priv->dvbt2_tune_param.tune_info =
+			CXD2880_TNRDMD_DVBT2_TUNE_INFO_INVALID_PLP_ID;
+	} else {
+		priv->dvbt2_tune_param.tune_info =
+			CXD2880_TNRDMD_DVBT2_TUNE_INFO_OK;
+	}
+
+	return 0;
+}
+
+static int cxd2880_read_status(struct dvb_frontend *fe,
+			       enum fe_status *status)
+{
+	int ret;
+	u8 sync = 0;
+	u8 lock = 0;
+	u8 unlock = 0;
+	struct cxd2880_priv *priv = NULL;
+	struct dtv_frontend_properties *c = NULL;
+
+	if ((!fe) || (!status)) {
+		pr_err("invalid arg\n");
+		return -EINVAL;
+	}
+
+	priv = fe->demodulator_priv;
+	c = &fe->dtv_property_cache;
+	*status = 0;
+
+	if (priv->tnrdmd.state == CXD2880_TNRDMD_STATE_ACTIVE) {
+		mutex_lock(priv->spi_mutex);
+		if (c->delivery_system == SYS_DVBT) {
+			ret = cxd2880_tnrdmd_dvbt_mon_sync_stat(
+							&priv->tnrdmd,
+							&sync,
+							&lock,
+							&unlock);
+		} else if (c->delivery_system == SYS_DVBT2) {
+			ret = cxd2880_tnrdmd_dvbt2_mon_sync_stat(
+							&priv->tnrdmd,
+							&sync,
+							&lock,
+							&unlock);
+		} else {
+			pr_err("invalid system");
+			mutex_unlock(priv->spi_mutex);
+			return -EINVAL;
+		}
+
+		mutex_unlock(priv->spi_mutex);
+		if (ret) {
+			pr_err("failed. sys = %d\n", priv->tnrdmd.sys);
+			return  ret;
+		}
+
+		if (sync == 6) {
+			*status = FE_HAS_SIGNAL |
+				  FE_HAS_CARRIER;
+		}
+		if (lock)
+			*status |= FE_HAS_VITERBI |
+				   FE_HAS_SYNC |
+				   FE_HAS_LOCK;
+	}
+
+	pr_debug("status %d\n", *status);
+
+	if (priv->s == 0 && (*status & FE_HAS_LOCK)) {
+		mutex_lock(priv->spi_mutex);
+		if (c->delivery_system == SYS_DVBT) {
+			ret = cxd2880_set_ber_per_period_t(fe);
+			priv->s = *status;
+		} else if (c->delivery_system == SYS_DVBT2) {
+			ret = cxd2880_check_l1post_plp(fe);
+			if (!ret) {
+				ret = cxd2880_set_ber_per_period_t2(fe);
+				priv->s = *status;
+			}
+		} else {
+			pr_err("invalid system\n");
+			mutex_unlock(priv->spi_mutex);
+			return -EINVAL;
+		}
+		mutex_unlock(priv->spi_mutex);
+	}
+
+	cxd2880_get_stats(fe, *status);
+	return  0;
+}
+
+static int cxd2880_tune(struct dvb_frontend *fe,
+			bool retune,
+			unsigned int mode_flags,
+			unsigned int *delay,
+			enum fe_status *status)
+{
+	int ret;
+
+	if ((!fe) || (!delay) || (!status)) {
+		pr_err("invalid arg.");
+		return -EINVAL;
+	}
+
+	if (retune) {
+		ret = cxd2880_set_frontend(fe);
+		if (ret) {
+			pr_err("cxd2880_set_frontend failed %d\n", ret);
+			return ret;
+		}
+	}
+
+	*delay = HZ / 5;
+
+	return cxd2880_read_status(fe, status);
+}
+
+static int cxd2880_get_frontend_t(struct dvb_frontend *fe,
+				  struct dtv_frontend_properties *c)
+{
+	int ret;
+	struct cxd2880_priv *priv = NULL;
+	enum cxd2880_dvbt_mode mode = CXD2880_DVBT_MODE_2K;
+	enum cxd2880_dvbt_guard guard = CXD2880_DVBT_GUARD_1_32;
+	struct cxd2880_dvbt_tpsinfo tps;
+	enum cxd2880_tnrdmd_spectrum_sense sense;
+	u16 snr = 0;
+	int strength = 0;
+
+	if ((!fe) || (!c)) {
+		pr_err("invalid arg\n");
+		return -EINVAL;
+	}
+
+	priv = fe->demodulator_priv;
+
+	mutex_lock(priv->spi_mutex);
+	ret = cxd2880_tnrdmd_dvbt_mon_mode_guard(&priv->tnrdmd,
+						 &mode, &guard);
+	mutex_unlock(priv->spi_mutex);
+	if (!ret) {
+		switch (mode) {
+		case CXD2880_DVBT_MODE_2K:
+			c->transmission_mode = TRANSMISSION_MODE_2K;
+			break;
+		case CXD2880_DVBT_MODE_8K:
+			c->transmission_mode = TRANSMISSION_MODE_8K;
+			break;
+		default:
+			c->transmission_mode = TRANSMISSION_MODE_2K;
+			pr_debug("transmission mode is invalid %d\n", mode);
+			break;
+		}
+		switch (guard) {
+		case CXD2880_DVBT_GUARD_1_32:
+			c->guard_interval = GUARD_INTERVAL_1_32;
+			break;
+		case CXD2880_DVBT_GUARD_1_16:
+			c->guard_interval = GUARD_INTERVAL_1_16;
+			break;
+		case CXD2880_DVBT_GUARD_1_8:
+			c->guard_interval = GUARD_INTERVAL_1_8;
+			break;
+		case CXD2880_DVBT_GUARD_1_4:
+			c->guard_interval = GUARD_INTERVAL_1_4;
+			break;
+		default:
+			c->guard_interval = GUARD_INTERVAL_1_32;
+			pr_debug("guard interval is invalid %d\n",
+				 guard);
+			break;
+		}
+	} else {
+		c->transmission_mode = TRANSMISSION_MODE_2K;
+		c->guard_interval = GUARD_INTERVAL_1_32;
+		pr_debug("ModeGuard err %d\n", ret);
+	}
+
+	mutex_lock(priv->spi_mutex);
+	ret = cxd2880_tnrdmd_dvbt_mon_tps_info(&priv->tnrdmd, &tps);
+	mutex_unlock(priv->spi_mutex);
+	if (!ret) {
+		switch (tps.hierarchy) {
+		case CXD2880_DVBT_HIERARCHY_NON:
+			c->hierarchy = HIERARCHY_NONE;
+			break;
+		case CXD2880_DVBT_HIERARCHY_1:
+			c->hierarchy = HIERARCHY_1;
+			break;
+		case CXD2880_DVBT_HIERARCHY_2:
+			c->hierarchy = HIERARCHY_2;
+			break;
+		case CXD2880_DVBT_HIERARCHY_4:
+			c->hierarchy = HIERARCHY_4;
+			break;
+		default:
+			c->hierarchy = HIERARCHY_NONE;
+			pr_debug("TPSInfo hierarchy is invalid %d\n",
+				 tps.hierarchy);
+			break;
+		}
+
+		switch (tps.rate_hp) {
+		case CXD2880_DVBT_CODERATE_1_2:
+			c->code_rate_HP = FEC_1_2;
+			break;
+		case CXD2880_DVBT_CODERATE_2_3:
+			c->code_rate_HP = FEC_2_3;
+			break;
+		case CXD2880_DVBT_CODERATE_3_4:
+			c->code_rate_HP = FEC_3_4;
+			break;
+		case CXD2880_DVBT_CODERATE_5_6:
+			c->code_rate_HP = FEC_5_6;
+			break;
+		case CXD2880_DVBT_CODERATE_7_8:
+			c->code_rate_HP = FEC_7_8;
+			break;
+		default:
+			c->code_rate_HP = FEC_NONE;
+			pr_debug("TPSInfo rateHP is invalid %d\n",
+				 tps.rate_hp);
+			break;
+		}
+		switch (tps.rate_lp) {
+		case CXD2880_DVBT_CODERATE_1_2:
+			c->code_rate_LP = FEC_1_2;
+			break;
+		case CXD2880_DVBT_CODERATE_2_3:
+			c->code_rate_LP = FEC_2_3;
+			break;
+		case CXD2880_DVBT_CODERATE_3_4:
+			c->code_rate_LP = FEC_3_4;
+			break;
+		case CXD2880_DVBT_CODERATE_5_6:
+			c->code_rate_LP = FEC_5_6;
+			break;
+		case CXD2880_DVBT_CODERATE_7_8:
+			c->code_rate_LP = FEC_7_8;
+			break;
+		default:
+			c->code_rate_LP = FEC_NONE;
+			pr_debug("TPSInfo rateLP is invalid %d\n",
+				 tps.rate_lp);
+			break;
+		}
+		switch (tps.constellation) {
+		case CXD2880_DVBT_CONSTELLATION_QPSK:
+			c->modulation = QPSK;
+			break;
+		case CXD2880_DVBT_CONSTELLATION_16QAM:
+			c->modulation = QAM_16;
+			break;
+		case CXD2880_DVBT_CONSTELLATION_64QAM:
+			c->modulation = QAM_64;
+			break;
+		default:
+			c->modulation = QPSK;
+			pr_debug("TPSInfo constellation is invalid %d\n",
+				 tps.constellation);
+			break;
+		}
+	} else {
+		c->hierarchy = HIERARCHY_NONE;
+		c->code_rate_HP = FEC_NONE;
+		c->code_rate_LP = FEC_NONE;
+		c->modulation = QPSK;
+		pr_debug("TPS info err %d\n", ret);
+	}
+
+	mutex_lock(priv->spi_mutex);
+	ret = cxd2880_tnrdmd_dvbt_mon_spectrum_sense(&priv->tnrdmd, &sense);
+	mutex_unlock(priv->spi_mutex);
+	if (!ret) {
+		switch (sense) {
+		case CXD2880_TNRDMD_SPECTRUM_NORMAL:
+			c->inversion = INVERSION_OFF;
+			break;
+		case CXD2880_TNRDMD_SPECTRUM_INV:
+			c->inversion = INVERSION_ON;
+			break;
+		default:
+			c->inversion = INVERSION_OFF;
+			pr_debug("spectrum sense is invalid %d\n", sense);
+			break;
+		}
+	} else {
+		c->inversion = INVERSION_OFF;
+		pr_debug("spectrum_sense %d\n", ret);
+	}
+
+	mutex_lock(priv->spi_mutex);
+	ret = cxd2880_tnrdmd_mon_rf_lvl(&priv->tnrdmd, &strength);
+	mutex_unlock(priv->spi_mutex);
+	if (!ret) {
+		c->strength.len = 1;
+		c->strength.stat[0].scale = FE_SCALE_DECIBEL;
+		c->strength.stat[0].svalue = strength;
+	} else {
+		c->strength.len = 1;
+		c->strength.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
+		pr_debug("mon_rf_lvl %d\n", ret);
+	}
+
+	ret = cxd2880_read_snr(fe, &snr);
+	if (!ret) {
+		c->cnr.len = 1;
+		c->cnr.stat[0].scale = FE_SCALE_DECIBEL;
+		c->cnr.stat[0].svalue = snr;
+	} else {
+		c->cnr.len = 1;
+		c->cnr.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
+		pr_debug("read_snr %d\n", ret);
+	}
+
+	return 0;
+}
+
+static int cxd2880_get_frontend_t2(struct dvb_frontend *fe,
+				   struct dtv_frontend_properties *c)
+{
+	int ret;
+	struct cxd2880_priv *priv = NULL;
+	struct cxd2880_dvbt2_l1pre l1pre;
+	enum cxd2880_dvbt2_plp_code_rate coderate;
+	enum cxd2880_dvbt2_plp_constell qam;
+	enum cxd2880_tnrdmd_spectrum_sense sense;
+	u16 snr = 0;
+	int strength = 0;
+
+	if ((!fe) || (!c)) {
+		pr_err("invalid arg.\n");
+		return -EINVAL;
+	}
+
+	priv = fe->demodulator_priv;
+
+	mutex_lock(priv->spi_mutex);
+	ret = cxd2880_tnrdmd_dvbt2_mon_l1_pre(&priv->tnrdmd, &l1pre);
+	mutex_unlock(priv->spi_mutex);
+	if (!ret) {
+		switch (l1pre.fft_mode) {
+		case CXD2880_DVBT2_M2K:
+			c->transmission_mode = TRANSMISSION_MODE_2K;
+			break;
+		case CXD2880_DVBT2_M8K:
+			c->transmission_mode = TRANSMISSION_MODE_8K;
+			break;
+		case CXD2880_DVBT2_M4K:
+			c->transmission_mode = TRANSMISSION_MODE_4K;
+			break;
+		case CXD2880_DVBT2_M1K:
+			c->transmission_mode = TRANSMISSION_MODE_1K;
+			break;
+		case CXD2880_DVBT2_M16K:
+			c->transmission_mode = TRANSMISSION_MODE_16K;
+			break;
+		case CXD2880_DVBT2_M32K:
+			c->transmission_mode = TRANSMISSION_MODE_32K;
+			break;
+		default:
+			c->transmission_mode = TRANSMISSION_MODE_2K;
+			pr_debug("L1Pre fft_mode is invalid %d\n",
+				 l1pre.fft_mode);
+			break;
+		}
+		switch (l1pre.gi) {
+		case CXD2880_DVBT2_G1_32:
+			c->guard_interval = GUARD_INTERVAL_1_32;
+			break;
+		case CXD2880_DVBT2_G1_16:
+			c->guard_interval = GUARD_INTERVAL_1_16;
+			break;
+		case CXD2880_DVBT2_G1_8:
+			c->guard_interval = GUARD_INTERVAL_1_8;
+			break;
+		case CXD2880_DVBT2_G1_4:
+			c->guard_interval = GUARD_INTERVAL_1_4;
+			break;
+		case CXD2880_DVBT2_G1_128:
+			c->guard_interval = GUARD_INTERVAL_1_128;
+			break;
+		case CXD2880_DVBT2_G19_128:
+			c->guard_interval = GUARD_INTERVAL_19_128;
+			break;
+		case CXD2880_DVBT2_G19_256:
+			c->guard_interval = GUARD_INTERVAL_19_256;
+			break;
+		default:
+			c->guard_interval = GUARD_INTERVAL_1_32;
+			pr_debug("L1Pre guard interval is invalid %d\n",
+				 l1pre.gi);
+			break;
+		}
+	} else {
+		c->transmission_mode = TRANSMISSION_MODE_2K;
+		c->guard_interval = GUARD_INTERVAL_1_32;
+		pr_debug("L1Pre err %d\n", ret);
+	}
+
+	mutex_lock(priv->spi_mutex);
+	ret = cxd2880_tnrdmd_dvbt2_mon_code_rate(&priv->tnrdmd,
+						 CXD2880_DVBT2_PLP_DATA,
+						 &coderate);
+	mutex_unlock(priv->spi_mutex);
+	if (!ret) {
+		switch (coderate) {
+		case CXD2880_DVBT2_R1_2:
+			c->fec_inner = FEC_1_2;
+			break;
+		case CXD2880_DVBT2_R3_5:
+			c->fec_inner = FEC_3_5;
+			break;
+		case CXD2880_DVBT2_R2_3:
+			c->fec_inner = FEC_2_3;
+			break;
+		case CXD2880_DVBT2_R3_4:
+			c->fec_inner = FEC_3_4;
+			break;
+		case CXD2880_DVBT2_R4_5:
+			c->fec_inner = FEC_4_5;
+			break;
+		case CXD2880_DVBT2_R5_6:
+			c->fec_inner = FEC_5_6;
+			break;
+		default:
+			c->fec_inner = FEC_NONE;
+			pr_debug("CodeRate is invalid %d\n", coderate);
+			break;
+		}
+	} else {
+		c->fec_inner = FEC_NONE;
+		pr_debug("CodeRate %d\n", ret);
+	}
+
+	mutex_lock(priv->spi_mutex);
+	ret = cxd2880_tnrdmd_dvbt2_mon_qam(&priv->tnrdmd,
+					   CXD2880_DVBT2_PLP_DATA,
+					   &qam);
+	mutex_unlock(priv->spi_mutex);
+	if (!ret) {
+		switch (qam) {
+		case CXD2880_DVBT2_QPSK:
+			c->modulation = QPSK;
+			break;
+		case CXD2880_DVBT2_QAM16:
+			c->modulation = QAM_16;
+			break;
+		case CXD2880_DVBT2_QAM64:
+			c->modulation = QAM_64;
+			break;
+		case CXD2880_DVBT2_QAM256:
+			c->modulation = QAM_256;
+			break;
+		default:
+			c->modulation = QPSK;
+			pr_debug("QAM is invalid %d\n", qam);
+			break;
+		}
+	} else {
+		c->modulation = QPSK;
+		pr_debug("QAM %d\n", ret);
+	}
+
+	mutex_lock(priv->spi_mutex);
+	ret = cxd2880_tnrdmd_dvbt2_mon_spectrum_sense(&priv->tnrdmd, &sense);
+	mutex_unlock(priv->spi_mutex);
+	if (!ret) {
+		switch (sense) {
+		case CXD2880_TNRDMD_SPECTRUM_NORMAL:
+			c->inversion = INVERSION_OFF;
+			break;
+		case CXD2880_TNRDMD_SPECTRUM_INV:
+			c->inversion = INVERSION_ON;
+			break;
+		default:
+			c->inversion = INVERSION_OFF;
+			pr_debug("spectrum sense is invalid %d\n", sense);
+			break;
+		}
+	} else {
+		c->inversion = INVERSION_OFF;
+		pr_debug("SpectrumSense %d\n", ret);
+	}
+
+	mutex_lock(priv->spi_mutex);
+	ret = cxd2880_tnrdmd_mon_rf_lvl(&priv->tnrdmd, &strength);
+	mutex_unlock(priv->spi_mutex);
+	if (!ret) {
+		c->strength.len = 1;
+		c->strength.stat[0].scale = FE_SCALE_DECIBEL;
+		c->strength.stat[0].svalue = strength;
+	} else {
+		c->strength.len = 1;
+		c->strength.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
+		pr_debug("mon_rf_lvl %d\n", ret);
+	}
+
+	ret = cxd2880_read_snr(fe, &snr);
+	if (!ret) {
+		c->cnr.len = 1;
+		c->cnr.stat[0].scale = FE_SCALE_DECIBEL;
+		c->cnr.stat[0].svalue = snr;
+	} else {
+		c->cnr.len = 1;
+		c->cnr.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
+		pr_debug("read_snr %d\n", ret);
+	}
+
+	return 0;
+}
+
+static int cxd2880_get_frontend(struct dvb_frontend *fe,
+				struct dtv_frontend_properties *props)
+{
+	struct cxd2880_priv *priv = NULL;
+	int ret;
+
+	if ((!fe) || (!props)) {
+		pr_err("invalid arg.");
+		return -EINVAL;
+	}
+
+	priv = fe->demodulator_priv;
+
+	pr_debug("system=%d\n", fe->dtv_property_cache.delivery_system);
+	switch (fe->dtv_property_cache.delivery_system) {
+	case SYS_DVBT:
+		ret = cxd2880_get_frontend_t(fe, props);
+		break;
+	case SYS_DVBT2:
+		ret = cxd2880_get_frontend_t2(fe, props);
+		break;
+	default:
+		ret = -EINVAL;
+		break;
+	}
+
+	return ret;
+}
+
+static enum dvbfe_algo cxd2880_get_frontend_algo(struct dvb_frontend *fe)
+{
+	return DVBFE_ALGO_HW;
+}
+
+static struct dvb_frontend_ops cxd2880_dvbt_t2_ops;
+
+struct dvb_frontend *cxd2880_attach(struct dvb_frontend *fe,
+				    struct cxd2880_config *cfg)
+{
+	int ret;
+	enum cxd2880_tnrdmd_chip_id chipid =
+					CXD2880_TNRDMD_CHIP_ID_UNKNOWN;
+	static struct cxd2880_priv *priv;
+	u8 data = 0;
+
+	if (!fe) {
+		pr_err("invalid arg.\n");
+		return NULL;
+	}
+
+	priv = kzalloc(sizeof(struct cxd2880_priv), GFP_KERNEL);
+	if (!priv)
+		return NULL;
+
+	priv->spi = cfg->spi;
+	priv->spi_mutex = cfg->spi_mutex;
+	priv->spi_device.spi = cfg->spi;
+
+	memcpy(&fe->ops, &cxd2880_dvbt_t2_ops,
+	       sizeof(struct dvb_frontend_ops));
+
+	ret = cxd2880_spi_device_initialize(&priv->spi_device,
+					    CXD2880_SPI_MODE_0,
+					    55000000);
+	if (ret) {
+		pr_err("spi_device_initialize failed. %d\n", ret);
+		kfree(priv);
+		return NULL;
+	}
+
+	ret = cxd2880_spi_device_create_spi(&priv->cxd2880_spi,
+					    &priv->spi_device);
+	if (ret) {
+		pr_err("spi_device_create_spi failed. %d\n", ret);
+		kfree(priv);
+		return NULL;
+	}
+
+	ret = cxd2880_io_spi_create(&priv->regio, &priv->cxd2880_spi, 0);
+	if (ret) {
+		pr_err("io_spi_create failed. %d\n", ret);
+		kfree(priv);
+		return NULL;
+	}
+	ret = priv->regio.write_reg(&priv->regio,
+				    CXD2880_IO_TGT_SYS, 0x00, 0x00);
+	if (ret) {
+		pr_err("set bank to 0x00 failed.\n");
+		kfree(priv);
+		return NULL;
+	}
+	ret = priv->regio.read_regs(&priv->regio,
+				    CXD2880_IO_TGT_SYS, 0xfd, &data, 1);
+	if (ret) {
+		pr_err("read chip id failed.\n");
+		kfree(priv);
+		return NULL;
+	}
+
+	chipid = (enum cxd2880_tnrdmd_chip_id)data;
+	if ((chipid != CXD2880_TNRDMD_CHIP_ID_CXD2880_ES1_0X) &&
+	    (chipid != CXD2880_TNRDMD_CHIP_ID_CXD2880_ES1_11)) {
+		pr_err("chip id invalid.\n");
+		kfree(priv);
+		return NULL;
+	}
+
+	fe->demodulator_priv = priv;
+	pr_info("CXD2880 driver version: Ver %s\n",
+		CXD2880_TNRDMD_DRIVER_VERSION);
+
+	return fe;
+}
+EXPORT_SYMBOL(cxd2880_attach);
+
+static struct dvb_frontend_ops cxd2880_dvbt_t2_ops = {
+	.info = {
+		.name = "Sony CXD2880",
+		.frequency_min =  174000000,
+		.frequency_max = 862000000,
+		.frequency_stepsize = 1000,
+		.caps = FE_CAN_INVERSION_AUTO |
+				FE_CAN_FEC_1_2 |
+				FE_CAN_FEC_2_3 |
+				FE_CAN_FEC_3_4 |
+				FE_CAN_FEC_4_5 |
+				FE_CAN_FEC_5_6	|
+				FE_CAN_FEC_7_8	|
+				FE_CAN_FEC_AUTO |
+				FE_CAN_QPSK |
+				FE_CAN_QAM_16 |
+				FE_CAN_QAM_32 |
+				FE_CAN_QAM_64 |
+				FE_CAN_QAM_128 |
+				FE_CAN_QAM_256 |
+				FE_CAN_QAM_AUTO |
+				FE_CAN_TRANSMISSION_MODE_AUTO |
+				FE_CAN_GUARD_INTERVAL_AUTO |
+				FE_CAN_2G_MODULATION |
+				FE_CAN_RECOVER |
+				FE_CAN_MUTE_TS,
+	},
+	.delsys = { SYS_DVBT, SYS_DVBT2 },
+
+	.release = cxd2880_release,
+	.init = cxd2880_init,
+	.sleep = cxd2880_sleep,
+	.tune = cxd2880_tune,
+	.set_frontend = cxd2880_set_frontend,
+	.get_frontend = cxd2880_get_frontend,
+	.read_status = cxd2880_read_status,
+	.read_ber = cxd2880_read_ber,
+	.read_signal_strength = cxd2880_read_signal_strength,
+	.read_snr = cxd2880_read_snr,
+	.read_ucblocks = cxd2880_read_ucblocks,
+	.get_frontend_algo = cxd2880_get_frontend_algo,
+};
+
+MODULE_DESCRIPTION(
+"Sony CXD2880 DVB-T2/T tuner + demodulator drvier");
+MODULE_AUTHOR("Sony Semiconductor Solutions Corporation");
+MODULE_LICENSE("GPL v2");
-- 
2.13.0
