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

It is very first DVB-T2 Linux driver!
Signed-off-by: NAntti Palosaari <crope@iki.fi>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

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
 

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
+

drivers/media/dvb/frontends/cxd2820r.h

+/*
+ * 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 */

drivers/media/dvb/frontends/cxd2820r_c.c

+/*
+ * 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->inversion = INVERSION_OFF;
+		break;
+	case 1:
+		c->inversion = INVERSION_ON;
+		break;
+	}
+
+	return ret;
+error:
+	dbg("%s: failed:%d", __func__, ret);
+	return ret;
+}
+
+static int cxd2820r_read_ber_c(struct dvb_frontend *fe, u32 *ber)
+{
+	struct cxd2820r_priv *priv = fe->demodulator_priv;
+	int ret;
+	u8 buf[3], start_ber = 0;
+	*ber = 0;
+
+	if (priv->ber_running) {
+		ret = cxd2820r_rd_regs(priv, 0x10076, buf, sizeof(buf));
+		if (ret)
+			goto error;
+
+		if ((buf[2] >> 7) & 0x01 || (buf[2] >> 4) & 0x01) {
+			*ber = (buf[2] & 0x0f) << 16 | buf[1] << 8 | buf[0];
+			start_ber = 1;
+		}
+	} else {
+		priv->ber_running = 1;
+		start_ber = 1;
+	}
+
+	if (start_ber) {
+		/* (re)start BER */
+		ret = cxd2820r_wr_reg(priv, 0x10079, 0x01);
+		if (ret)
+			goto error;
+	}
+
+	return ret;
+error:
+	dbg("%s: failed:%d", __func__, ret);
+	return ret;
+}
+
+static int cxd2820r_read_signal_strength_c(struct dvb_frontend *fe,
+	u16 *strength)
+{
+	struct cxd2820r_priv *priv = fe->demodulator_priv;
+	int ret;
+	u8 buf[2];
+	u16 tmp;
+
+	ret = cxd2820r_rd_regs(priv, 0x10049, buf, sizeof(buf));
+	if (ret)
+		goto error;
+
+	tmp = (buf[0] & 0x03) << 8 | buf[1];
+	tmp = (~tmp & 0x03ff);
+
+	if (tmp == 512)
+		/* ~no signal */
+		tmp = 0;
+	else if (tmp > 350)
+		tmp = 350;
+
+	/* scale value to 0x0000-0xffff */
+	*strength = tmp * 0xffff / (350-0);
+
+	return ret;
+error:
+	dbg("%s: failed:%d", __func__, ret);
+	return ret;
+}
+
+static int cxd2820r_read_snr_c(struct dvb_frontend *fe, u16 *snr)
+{
+	struct cxd2820r_priv *priv = fe->demodulator_priv;
+	int ret;
+	u8 tmp;
+	unsigned int A, B;
+	/* report SNR in dB * 10 */
+
+	ret = cxd2820r_rd_reg(priv, 0x10019, &tmp);
+	if (ret)
+		goto error;
+
+	if (((tmp >> 0) & 0x03) % 2) {
+		A = 875;
+		B = 650;
+	} else {
+		A = 950;
+		B = 760;
+	}
+
+	ret = cxd2820r_rd_reg(priv, 0x1004d, &tmp);
+	if (ret)
+		goto error;
+
+	#define CXD2820R_LOG2_E_24 24204406 /* log2(e) << 24 */
+	if (tmp)
+		*snr = A * (intlog2(B / tmp) >> 5) / (CXD2820R_LOG2_E_24 >> 5)
+			/ 10;
+	else
+		*snr = 0;
+
+	return ret;
+error:
+	dbg("%s: failed:%d", __func__, ret);
+	return ret;
+}
+
+static int cxd2820r_read_ucblocks_c(struct dvb_frontend *fe, u32 *ucblocks)
+{
+	*ucblocks = 0;
+	/* no way to read ? */
+	return 0;
+}
+
+static int cxd2820r_read_status_c(struct dvb_frontend *fe, fe_status_t *status)
+{
+	struct cxd2820r_priv *priv = fe->demodulator_priv;
+	int ret;
+	u8 buf[2];
+	*status = 0;
+
+	ret = cxd2820r_rd_regs(priv, 0x10088, buf, sizeof(buf));
+	if (ret)
+		goto error;
+
+	if (((buf[0] >> 0) & 0x01) == 1) {
+		*status |= FE_HAS_SIGNAL | FE_HAS_CARRIER |
+			FE_HAS_VITERBI | FE_HAS_SYNC;
+
+		if (((buf[1] >> 3) & 0x01) == 1) {
+			*status |= FE_HAS_SIGNAL | FE_HAS_CARRIER |
+				FE_HAS_VITERBI | FE_HAS_SYNC | FE_HAS_LOCK;
+		}
+	}
+
+	dbg("%s: lock=%02x %02x", __func__, buf[0], buf[1]);
+
+	return ret;
+error:
+	dbg("%s: failed:%d", __func__, ret);
+	return ret;
+}
+
+static int cxd2820r_init_c(struct dvb_frontend *fe)
+{
+	struct cxd2820r_priv *priv = fe->demodulator_priv;
+	int ret;
+
+	ret = cxd2820r_wr_reg(priv, 0x00085, 0x07);
+	if (ret)
+		goto error;
+
+	return ret;
+error:
+	dbg("%s: failed:%d", __func__, ret);
+	return ret;
+}
+
+static int cxd2820r_sleep_c(struct dvb_frontend *fe)
+{
+	struct cxd2820r_priv *priv = fe->demodulator_priv;
+	int ret, i;
+	struct reg_val_mask tab[] = {
+		{ 0x000ff, 0x1f, 0xff },
+		{ 0x00085, 0x00, 0xff },
+		{ 0x00088, 0x01, 0xff },
+		{ 0x00081, 0x00, 0xff },
+		{ 0x00080, 0x00, 0xff },
+	};
+
+	dbg("%s", __func__);
+
+	priv->delivery_system = SYS_UNDEFINED;
+
+	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;
+	}
+
+	return ret;
+error:
+	dbg("%s: failed:%d", __func__, ret);
+	return ret;
+}
+
+static int cxd2820r_get_tune_settings_c(struct dvb_frontend *fe,
+	struct dvb_frontend_tune_settings *s)
+{
+	s->min_delay_ms = 500;
+	s->step_size = 0; /* no zigzag */
+	s->max_drift = 0;
+
+	return 0;
+}
+

drivers/media/dvb/frontends/cxd2820r_priv.h

+/*
+ * 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_PRIV_H
+#define CXD2820R_PRIV_H
+
+#include "dvb_frontend.h"
+#include "dvb_math.h"
+#include "cxd2820r.h"
+
+#define LOG_PREFIX "cxd2820r"
+
+#undef dbg
+#define dbg(f, arg...) \
+	if (cxd2820r_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)
+
+/*
+ * FIXME: These are totally wrong and must be added properly to the API.
+ * Only temporary solution in order to get driver compile.
+ */
+#define SYS_DVBT2             SYS_DAB
+#define TRANSMISSION_MODE_1K  0
+#define TRANSMISSION_MODE_16K 0
+#define TRANSMISSION_MODE_32K 0
+#define GUARD_INTERVAL_1_128  0
+#define GUARD_INTERVAL_19_128 0
+#define GUARD_INTERVAL_19_256 0
+
+struct reg_val_mask {
+	u32 reg;
+	u8  val;
+	u8  mask;
+};
+
+struct cxd2820r_priv {
+	struct i2c_adapter *i2c;
+	struct dvb_frontend fe[2];
+	struct cxd2820r_config cfg;
+	struct i2c_adapter tuner_i2c_adapter;
+
+	struct mutex fe_lock; /* FE lock */
+	int active_fe:2; /* FE lock, -1=NONE, 0=DVB-T/T2, 1=DVB-C */
+
+	int ber_running:1;
+
+	u8 bank[2];
+	u8 gpio[3];
+
+	fe_delivery_system_t delivery_system;
+};
+
+#endif /* CXD2820R_PRIV_H */

drivers/media/dvb/frontends/cxd2820r_t.c

+/*
+ * 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_t(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, i;
+	u32 if_khz, if_ctl;
+	u64 num;
+	u8 buf[3], bw_param;
+	u8 bw_params1[][5] = {
+		{ 0x17, 0xea, 0xaa, 0xaa, 0xaa }, /* 6 MHz */
+		{ 0x14, 0x80, 0x00, 0x00, 0x00 }, /* 7 MHz */
+		{ 0x11, 0xf0, 0x00, 0x00, 0x00 }, /* 8 MHz */
+	};
+	u8 bw_params2[][2] = {
+		{ 0x1f, 0xdc }, /* 6 MHz */
+		{ 0x12, 0xf8 }, /* 7 MHz */
+		{ 0x01, 0xe0 }, /* 8 MHz */
+	};
+	struct reg_val_mask tab[] = {
+		{ 0x00080, 0x00, 0xff },
+		{ 0x00081, 0x03, 0xff },
+		{ 0x00085, 0x07, 0xff },
+		{ 0x00088, 0x01, 0xff },
+
+		{ 0x00070, priv->cfg.ts_mode, 0xff },
+		{ 0x000cb, priv->cfg.if_agc_polarity << 6, 0x40 },
+		{ 0x000a5, 0x00, 0x01 },
+		{ 0x00082, 0x20, 0x60 },
+		{ 0x000c2, 0xc3, 0xff },
+		{ 0x0016a, 0x50, 0xff },
+		{ 0x00427, 0x41, 0xff },
+	};
+
+	dbg("%s: RF=%d BW=%d", __func__, c->frequency, c->bandwidth_hz);
+
+	/* 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, p);
+
+	if (priv->delivery_system != SYS_DVBT) {
+		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_DVBT;
+	priv->ber_running = 0; /* tune stops BER counter */
+
+	switch (c->bandwidth_hz) {
+	case 6000000:
+		if_khz = priv->cfg.if_dvbt_6;
+		i = 0;
+		bw_param = 2;
+		break;
+	case 7000000:
+		if_khz = priv->cfg.if_dvbt_7;
+		i = 1;
+		bw_param = 1;
+		break;
+	case 8000000:
+		if_khz = priv->cfg.if_dvbt_8;
+		i = 2;
+		bw_param = 0;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	num = if_khz;
+	num *= 0x1000000;
+	if_ctl = cxd2820r_div_u64_round_closest(num, 41000);
+	buf[0] = ((if_ctl >> 16) & 0xff);
+	buf[1] = ((if_ctl >>  8) & 0xff);
+	buf[2] = ((if_ctl >>  0) & 0xff);
+
+	ret = cxd2820r_wr_regs(priv, 0x000b6, buf, 3);
+	if (ret)
+		goto error;
+
+	ret = cxd2820r_wr_regs(priv, 0x0009f, bw_params1[i], 5);
+	if (ret)
+		goto error;
+
+	ret = cxd2820r_wr_reg_mask(priv, 0x000d7, bw_param << 6, 0xc0);
+	if (ret)
+		goto error;
+
+	ret = cxd2820r_wr_regs(priv, 0x000d9, bw_params2[i], 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_t(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, 0x0002f, buf, sizeof(buf));
+	if (ret)
+		goto error;
+
+	switch ((buf[0] >> 6) & 0x03) {
+	case 0:
+		c->modulation = QPSK;
+		break;
+	case 1:
+		c->modulation = QAM_16;
+		break;
+	case 2:
+		c->modulation = QAM_64;
+		break;
+	}
+
+	switch ((buf[1] >> 1) & 0x03) {
+	case 0:
+		c->transmission_mode = TRANSMISSION_MODE_2K;
+		break;
+	case 1:
+		c->transmission_mode = TRANSMISSION_MODE_8K;
+		break;
+	}
+
+	switch ((buf[1] >> 3) & 0x03) {
+	case 0:
+		c->guard_interval = GUARD_INTERVAL_1_32;
+		break;
+	case 1:
+		c->guard_interval = GUARD_INTERVAL_1_16;
+		break;
+	case 2:
+		c->guard_interval = GUARD_INTERVAL_1_8;
+		break;
+	case 3:
+		c->guard_interval = GUARD_INTERVAL_1_4;
+		break;
+	}
+
+	switch ((buf[0] >> 3) & 0x07) {
+	case 0:
+		c->hierarchy = HIERARCHY_NONE;
+		break;
+	case 1:
+		c->hierarchy = HIERARCHY_1;
+		break;
+	case 2:
+		c->hierarchy = HIERARCHY_2;
+		break;
+	case 3:
+		c->hierarchy = HIERARCHY_4;
+		break;
+	}
+
+	switch ((buf[0] >> 0) & 0x07) {
+	case 0:
+		c->code_rate_HP = FEC_1_2;
+		break;
+	case 1:
+		c->code_rate_HP = FEC_2_3;
+		break;
+	case 2:
+		c->code_rate_HP = FEC_3_4;
+		break;
+	case 3:
+		c->code_rate_HP = FEC_5_6;
+		break;
+	case 4:
+		c->code_rate_HP = FEC_7_8;
+		break;
+	}
+
+	switch ((buf[1] >> 5) & 0x07) {
+	case 0:
+		c->code_rate_LP = FEC_1_2;
+		break;
+	case 1:
+		c->code_rate_LP = FEC_2_3;
+		break;
+	case 2:
+		c->code_rate_LP = FEC_3_4;
+		break;
+	case 3:
+		c->code_rate_LP = FEC_5_6;
+		break;
+	case 4:
+		c->code_rate_LP = FEC_7_8;
+		break;
+	}
+
+	ret = cxd2820r_rd_reg(priv, 0x007c6, &buf[0]);
+	if (ret)
+		goto error;
+
+	switch ((buf[0] >> 0) & 0x01) {
+	case 0:
+		c->inversion = INVERSION_OFF;
+		break;
+	case 1:
+		c->inversion = INVERSION_ON;
+		break;
+	}
+
+	return ret;
+error:
+	dbg("%s: failed:%d", __func__, ret);
+	return ret;
+}
+
+static int cxd2820r_read_ber_t(struct dvb_frontend *fe, u32 *ber)
+{
+	struct cxd2820r_priv *priv = fe->demodulator_priv;
+	int ret;
+	u8 buf[3], start_ber = 0;
+	*ber = 0;
+
+	if (priv->ber_running) {
+		ret = cxd2820r_rd_regs(priv, 0x00076, buf, sizeof(buf));
+		if (ret)
+			goto error;
+
+		if ((buf[2] >> 7) & 0x01 || (buf[2] >> 4) & 0x01) {
+			*ber = (buf[2] & 0x0f) << 16 | buf[1] << 8 | buf[0];
+			start_ber = 1;
+		}
+	} else {
+		priv->ber_running = 1;
+		start_ber = 1;
+	}
+
+	if (start_ber) {
+		/* (re)start BER */
+		ret = cxd2820r_wr_reg(priv, 0x00079, 0x01);
+		if (ret)
+			goto error;
+	}
+
+	return ret;
+error:
+	dbg("%s: failed:%d", __func__, ret);
+	return ret;
+}
+
+static int cxd2820r_read_signal_strength_t(struct dvb_frontend *fe,
+	u16 *strength)
+{
+	struct cxd2820r_priv *priv = fe->demodulator_priv;
+	int ret;
+	u8 buf[2];
+	u16 tmp;
+
+	ret = cxd2820r_rd_regs(priv, 0x00026, buf, sizeof(buf));
+	if (ret)
+		goto error;
+
+	tmp = (buf[0] & 0x0f) << 8 | buf[1];
+	tmp = ~tmp & 0x0fff;
+
+	/* scale value to 0x0000-0xffff from 0x0000-0x0fff */
+	*strength = tmp * 0xffff / 0x0fff;
+
+	return ret;
+error:
+	dbg("%s: failed:%d", __func__, ret);
+	return ret;
+}
+
+static int cxd2820r_read_snr_t(struct dvb_frontend *fe, u16 *snr)
+{
+	struct cxd2820r_priv *priv = fe->demodulator_priv;
+	int ret;
+	u8 buf[2];
+	u16 tmp;
+	/* report SNR in dB * 10 */
+
+	ret = cxd2820r_rd_regs(priv, 0x00028, buf, sizeof(buf));
+	if (ret)
+		goto error;
+
+	tmp = (buf[0] & 0x1f) << 8 | buf[1];
+	#define CXD2820R_LOG10_8_24 15151336 /* log10(8) << 24 */
+	if (tmp)
+		*snr = (intlog10(tmp) - CXD2820R_LOG10_8_24) / ((1 << 24)
+			/ 100);
+	else
+		*snr = 0;
+
+	dbg("%s: dBx10=%d val=%04x", __func__, *snr, tmp);
+
+	return ret;
+error:
+	dbg("%s: failed:%d", __func__, ret);
+	return ret;
+}
+
+static int cxd2820r_read_ucblocks_t(struct dvb_frontend *fe, u32 *ucblocks)
+{
+	*ucblocks = 0;
+	/* no way to read ? */
+	return 0;
+}
+
+static int cxd2820r_read_status_t(struct dvb_frontend *fe, fe_status_t *status)
+{
+	struct cxd2820r_priv *priv = fe->demodulator_priv;
+	int ret;
+	u8 buf[4];
+	*status = 0;
+
+	ret = cxd2820r_rd_reg(priv, 0x00010, &buf[0]);
+	if (ret)
+		goto error;
+
+	if ((buf[0] & 0x07) == 6) {
+		ret = cxd2820r_rd_reg(priv, 0x00073, &buf[1]);
+		if (ret)
+			goto error;
+
+		if (((buf[1] >> 3) & 0x01) == 1) {
+			*status |= FE_HAS_SIGNAL | FE_HAS_CARRIER |
+				FE_HAS_VITERBI | FE_HAS_SYNC | FE_HAS_LOCK;
+		} else {
+			*status |= FE_HAS_SIGNAL | FE_HAS_CARRIER |
+				FE_HAS_VITERBI | FE_HAS_SYNC;
+		}
+	} else {
+		ret = cxd2820r_rd_reg(priv, 0x00014, &buf[2]);
+		if (ret)
+			goto error;
+
+		if ((buf[2] & 0x0f) >= 4) {
+			ret = cxd2820r_rd_reg(priv, 0x00a14, &buf[3]);
+			if (ret)
+				goto error;
+
+			if (((buf[3] >> 4) & 0x01) == 1)
+				*status |= FE_HAS_SIGNAL;
+		}
+	}
+
+	dbg("%s: lock=%02x %02x %02x %02x", __func__,
+		buf[0], buf[1], buf[2], buf[3]);
+
+	return ret;
+error:
+	dbg("%s: failed:%d", __func__, ret);
+	return ret;
+}
+
+static int cxd2820r_init_t(struct dvb_frontend *fe)
+{
+	struct cxd2820r_priv *priv = fe->demodulator_priv;
+	int ret;
+
+	ret = cxd2820r_wr_reg(priv, 0x00085, 0x07);
+	if (ret)
+		goto error;
+
+	return ret;
+error:
+	dbg("%s: failed:%d", __func__, ret);
+	return ret;
+}
+
+static int cxd2820r_sleep_t(struct dvb_frontend *fe)
+{
+	struct cxd2820r_priv *priv = fe->demodulator_priv;
+	int ret, i;
+	struct reg_val_mask tab[] = {
+		{ 0x000ff, 0x1f, 0xff },
+		{ 0x00085, 0x00, 0xff },
+		{ 0x00088, 0x01, 0xff },
+		{ 0x00081, 0x00, 0xff },
+		{ 0x00080, 0x00, 0xff },
+	};
+
+	dbg("%s", __func__);
+
+	priv->delivery_system = SYS_UNDEFINED;
+
+	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;
+	}
+
+	return ret;
+error:
+	dbg("%s: failed:%d", __func__, ret);
+	return ret;
+}
+
+static int cxd2820r_get_tune_settings_t(struct dvb_frontend *fe,
+	struct dvb_frontend_tune_settings *s)
+{
+	s->min_delay_ms = 500;
+	s->step_size = fe->ops.info.frequency_stepsize * 2;
+	s->max_drift = (fe->ops.info.frequency_stepsize * 2) + 1;
+
+	return 0;
+}
+

drivers/media/dvb/frontends/cxd2820r_t2.c

+/*
+ * 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_t2(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;
+	u32 if_khz, if_ctl;
+	u64 num;
+	u8 buf[3], bw_param;
+	u8 bw_params1[][5] = {
+		{ 0x1c, 0xb3, 0x33, 0x33, 0x33 }, /* 5 MHz */
+		{ 0x17, 0xea, 0xaa, 0xaa, 0xaa }, /* 6 MHz */
+		{ 0x14, 0x80, 0x00, 0x00, 0x00 }, /* 7 MHz */
+		{ 0x11, 0xf0, 0x00, 0x00, 0x00 }, /* 8 MHz */
+	};
+	struct reg_val_mask tab[] = {
+		{ 0x00080, 0x02, 0xff },
+		{ 0x00081, 0x20, 0xff },
+		{ 0x00085, 0x07, 0xff },
+		{ 0x00088, 0x01, 0xff },
+		{ 0x02069, 0x01, 0xff },
+
+		{ 0x0207f, 0x2a, 0xff },
+		{ 0x02082, 0x0a, 0xff },
+		{ 0x02083, 0x0a, 0xff },
+		{ 0x020cb, priv->cfg.if_agc_polarity << 6, 0x40 },
+		{ 0x02070, priv->cfg.ts_mode, 0xff },
+		{ 0x020b5, priv->cfg.spec_inv << 4, 0x10 },
+		{ 0x02567, 0x07, 0x0f },
+		{ 0x02569, 0x03, 0x03 },
+		{ 0x02595, 0x1a, 0xff },
+		{ 0x02596, 0x50, 0xff },
+		{ 0x02a8c, 0x00, 0xff },
+		{ 0x02a8d, 0x34, 0xff },
+		{ 0x02a45, 0x06, 0x07 },
+		{ 0x03f10, 0x0d, 0xff },
+		{ 0x03f11, 0x02, 0xff },
+		{ 0x03f12, 0x01, 0xff },
+		{ 0x03f23, 0x2c, 0xff },
+		{ 0x03f51, 0x13, 0xff },
+		{ 0x03f52, 0x01, 0xff },
+		{ 0x03f53, 0x00, 0xff },
+		{ 0x027e6, 0x14, 0xff },
+		{ 0x02786, 0x02, 0x07 },
+		{ 0x02787, 0x40, 0xe0 },
+		{ 0x027ef, 0x10, 0x18 },
+	};
+
+	dbg("%s: RF=%d BW=%d", __func__, c->frequency, c->bandwidth_hz);
+
+	/* 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_DVBT2) {
+		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_DVBT2;
+
+	switch (c->bandwidth_hz) {
+	case 5000000:
+		if_khz = priv->cfg.if_dvbt2_5;
+		i = 0;
+		bw_param = 3;
+		break;
+	case 6000000:
+		if_khz = priv->cfg.if_dvbt2_6;
+		i = 1;
+		bw_param = 2;
+		break;
+	case 7000000:
+		if_khz = priv->cfg.if_dvbt2_7;
+		i = 2;
+		bw_param = 1;
+		break;
+	case 8000000:
+		if_khz = priv->cfg.if_dvbt2_8;
+		i = 3;
+		bw_param = 0;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	num = if_khz;
+	num *= 0x1000000;
+	if_ctl = cxd2820r_div_u64_round_closest(num, 41000);
+	buf[0] = ((if_ctl >> 16) & 0xff);
+	buf[1] = ((if_ctl >>  8) & 0xff);
+	buf[2] = ((if_ctl >>  0) & 0xff);
+
+	ret = cxd2820r_wr_regs(priv, 0x020b6, buf, 3);
+	if (ret)
+		goto error;
+
+	ret = cxd2820r_wr_regs(priv, 0x0209f, bw_params1[i], 5);
+	if (ret)
+		goto error;
+
+	ret = cxd2820r_wr_reg_mask(priv, 0x020d7, bw_param << 6, 0xc0);
+	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_t2(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, 0x0205c, buf, 2);
+	if (ret)
+		goto error;
+
+	switch ((buf[0] >> 0) & 0x07) {
+	case 0:
+		c->transmission_mode = TRANSMISSION_MODE_2K;
+		break;
+	case 1:
+		c->transmission_mode = TRANSMISSION_MODE_8K;
+		break;
+	case 2:
+		c->transmission_mode = TRANSMISSION_MODE_4K;
+		break;
+	case 3:
+		c->transmission_mode = TRANSMISSION_MODE_1K;
+		break;
+	case 4:
+		c->transmission_mode = TRANSMISSION_MODE_16K;
+		break;
+	case 5:
+		c->transmission_mode = TRANSMISSION_MODE_32K;
+		break;
+	}
+
+	switch ((buf[1] >> 4) & 0x07) {
+	case 0:
+		c->guard_interval = GUARD_INTERVAL_1_32;
+		break;
+	case 1:
+		c->guard_interval = GUARD_INTERVAL_1_16;
+		break;
+	case 2:
+		c->guard_interval = GUARD_INTERVAL_1_8;
+		break;
+	case 3:
+		c->guard_interval = GUARD_INTERVAL_1_4;
+		break;
+	case 4:
+		c->guard_interval = GUARD_INTERVAL_1_128;
+		break;
+	case 5:
+		c->guard_interval = GUARD_INTERVAL_19_128;
+		break;
+	case 6:
+		c->guard_interval = GUARD_INTERVAL_19_256;
+		break;
+	}
+
+	ret = cxd2820r_rd_regs(priv, 0x0225b, buf, 2);
+	if (ret)
+		goto error;
+
+	switch ((buf[0] >> 0) & 0x07) {
+	case 0:
+		c->fec_inner = FEC_1_2;
+		break;
+	case 1:
+		c->fec_inner = FEC_3_5;
+		break;
+	case 2:
+		c->fec_inner = FEC_2_3;
+		break;
+	case 3:
+		c->fec_inner = FEC_3_4;
+		break;
+	case 4:
+		c->fec_inner = FEC_4_5;
+		break;
+	case 5:
+		c->fec_inner = FEC_5_6;
+		break;
+	}
+
+	switch ((buf[1] >> 0) & 0x07) {
+	case 0:
+		c->modulation = QPSK;
+		break;
+	case 1:
+		c->modulation = QAM_16;
+		break;
+	case 2:
+		c->modulation = QAM_64;
+		break;
+	case 3:
+		c->modulation = QAM_256;
+		break;
+	}
+
+	ret = cxd2820r_rd_reg(priv, 0x020b5, &buf[0]);
+	if (ret)
+		goto error;
+
+	switch ((buf[0] >> 4) & 0x01) {
+	case 0:
+		c->inversion = INVERSION_OFF;
+		break;
+	case 1:
+		c->inversion = INVERSION_ON;
+		break;
+	}
+
+	return ret;
+error:
+	dbg("%s: failed:%d", __func__, ret);
+	return ret;
+}
+
+static int cxd2820r_read_status_t2(struct dvb_frontend *fe, fe_status_t *status)
+{
+	struct cxd2820r_priv *priv = fe->demodulator_priv;
+	int ret;
+	u8 buf[1];
+	*status = 0;
+
+	ret = cxd2820r_rd_reg(priv, 0x02010 , &buf[0]);
+	if (ret)
+		goto error;
+
+	if ((buf[0] & 0x07) == 6) {
+		if (((buf[0] >> 5) & 0x01) == 1) {
+			*status |= FE_HAS_SIGNAL | FE_HAS_CARRIER |
+				FE_HAS_VITERBI | FE_HAS_SYNC | FE_HAS_LOCK;
+		} else {
+			*status |= FE_HAS_SIGNAL | FE_HAS_CARRIER |
+				FE_HAS_VITERBI | FE_HAS_SYNC;
+		}
+	}
+
+	dbg("%s: lock=%02x", __func__, buf[0]);
+
+	return ret;
+error:
+	dbg("%s: failed:%d", __func__, ret);
+	return ret;
+}
+
+static int cxd2820r_read_ber_t2(struct dvb_frontend *fe, u32 *ber)
+{
+	struct cxd2820r_priv *priv = fe->demodulator_priv;
+	int ret;
+	u8 buf[4];
+	unsigned int errbits;
+	*ber = 0;
+	/* FIXME: correct calculation */
+
+	ret = cxd2820r_rd_regs(priv, 0x02039, buf, sizeof(buf));
+	if (ret)
+		goto error;
+
+	if ((buf[0] >> 4) & 0x01) {
+		errbits = (buf[0] & 0x0f) << 24 | buf[1] << 16 |
+			buf[2] << 8 | buf[3];
+
+		if (errbits)
+			*ber = errbits * 64 / 16588800;
+	}
+
+	return ret;
+error:
+	dbg("%s: failed:%d", __func__, ret);
+	return ret;
+}
+
+static int cxd2820r_read_signal_strength_t2(struct dvb_frontend *fe,
+	u16 *strength)
+{
+	struct cxd2820r_priv *priv = fe->demodulator_priv;
+	int ret;
+	u8 buf[2];
+	u16 tmp;
+
+	ret = cxd2820r_rd_regs(priv, 0x02026, buf, sizeof(buf));
+	if (ret)
+		goto error;
+
+	tmp = (buf[0] & 0x0f) << 8 | buf[1];
+	tmp = ~tmp & 0x0fff;
+
+	/* scale value to 0x0000-0xffff from 0x0000-0x0fff */
+	*strength = tmp * 0xffff / 0x0fff;
+
+	return ret;
+error:
+	dbg("%s: failed:%d", __func__, ret);
+	return ret;
+}
+
+static int cxd2820r_read_snr_t2(struct dvb_frontend *fe, u16 *snr)
+{
+	struct cxd2820r_priv *priv = fe->demodulator_priv;
+	int ret;
+	u8 buf[2];
+	u16 tmp;
+	/* report SNR in dB * 10 */
+
+	ret = cxd2820r_rd_regs(priv, 0x02028, buf, sizeof(buf));
+	if (ret)
+		goto error;
+
+	tmp = (buf[0] & 0x0f) << 8 | buf[1];
+	#define CXD2820R_LOG10_8_24 15151336 /* log10(8) << 24 */
+	if (tmp)
+		*snr = (intlog10(tmp) - CXD2820R_LOG10_8_24) / ((1 << 24)
+			/ 100);
+	else
+		*snr = 0;
+
+	dbg("%s: dBx10=%d val=%04x", __func__, *snr, tmp);
+
+	return ret;
+error:
+	dbg("%s: failed:%d", __func__, ret);
+	return ret;
+}
+
+static int cxd2820r_read_ucblocks_t2(struct dvb_frontend *fe, u32 *ucblocks)
+{
+	*ucblocks = 0;
+	/* no way to read ? */
+	return 0;
+}
+
+static int cxd2820r_sleep_t2(struct dvb_frontend *fe)
+{
+	struct cxd2820r_priv *priv = fe->demodulator_priv;
+	int ret, i;
+	struct reg_val_mask tab[] = {
+		{ 0x000ff, 0x1f, 0xff },
+		{ 0x00085, 0x00, 0xff },
+		{ 0x00088, 0x01, 0xff },
+		{ 0x02069, 0x00, 0xff },
+		{ 0x00081, 0x00, 0xff },
+		{ 0x00080, 0x00, 0xff },
+	};
+
+	dbg("%s", __func__);
+
+	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_UNDEFINED;
+
+	return ret;
+error:
+	dbg("%s: failed:%d", __func__, ret);
+	return ret;
+}
+
+static int cxd2820r_get_tune_settings_t2(struct dvb_frontend *fe,
+	struct dvb_frontend_tune_settings *s)
+{
+	s->min_delay_ms = 1500;
+	s->step_size = fe->ops.info.frequency_stepsize * 2;
+	s->max_drift = (fe->ops.info.frequency_stepsize * 2) + 1;
+
+	return 0;
+}
+