Message-Id: <71d2d85fdbc671c0c06656d507134e4e9faa031e.1455556118.git.knightrider@are.ma>
Date:	Tue, 16 Feb 2016 02:24:33 +0900
From:	info@....ma
To:	linux-media@...r.kernel.org
Cc:	Буди Романто, AreMa Inc <knightrider@....ma>,
	linux-kernel@...r.kernel.org, crope@....fi, m.chehab@...sung.com,
	mchehab@....samsung.com, hdegoede@...hat.com,
	laurent.pinchart@...asonboard.com, mkrufky@...uxtv.org,
	sylvester.nawrocki@...il.com, g.liakhovetski@....de,
	peter.senna@...il.com
Subject: [media 4/7] Toshiba TC90522XBG quad demod (2ch OFDM + 2ch 8PSK) for PT3 & PXQ3PE

From: Буди Романто, AreMa Inc <knightrider@....ma>

Signed-off-by: Буди Романто, AreMa Inc <knightrider@....ma>
---
 drivers/media/dvb-frontends/tc90522.c | 280 ++++++++++++++++++++++++++++++++++
 drivers/media/dvb-frontends/tc90522.h |  18 +++
 2 files changed, 298 insertions(+)
 create mode 100644 drivers/media/dvb-frontends/tc90522.c
 create mode 100644 drivers/media/dvb-frontends/tc90522.h

diff --git a/drivers/media/dvb-frontends/tc90522.c b/drivers/media/dvb-frontends/tc90522.c
new file mode 100644
index 0000000..94cfbfc
--- /dev/null
+++ b/drivers/media/dvb-frontends/tc90522.c
@@ -0,0 +1,280 @@
+/*
+ * Toshiba TC90522XBG 2ch OFDM(ISDB-T) + 2ch 8PSK(ISDB-S) demodulator
+ *
+ * Copyright (C) Budi Rachmanto, AreMa Inc. <info@....ma>
+ *
+ * Supported cards:
+ *	Earthsoft PT3
+ *	PLEX PX-Q3PE
+ *
+ * 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.
+ */
+
+#include <linux/pci.h>
+#include "dvb_math.h"
+#include "dvb_frontend.h"
+#include "tc90522.h"
+
+struct tc90522 {
+	struct i2c_adapter *i2c;
+	enum fe_status stat;
+};
+
+bool tc90522_r(struct dvb_frontend *fe, u8 slvadr, u8 *buf, u8 len)
+{
+	struct tc90522 *d = fe->demodulator_priv;
+	struct i2c_msg msg[] = {
+		{.addr = fe->id,	.flags = 0,		.buf = &slvadr,	.len = 1,},
+		{.addr = fe->id,	.flags = I2C_M_RD,	.buf = buf,	.len = len,},
+	};
+	return i2c_transfer(d->i2c, msg, 2) == 2;
+}
+
+bool tc90522_w(struct dvb_frontend *fe, u8 slvadr, u8 dat)
+{
+	struct tc90522 *d = fe->demodulator_priv;
+	u8 buf[] = {slvadr, dat};
+	struct i2c_msg msg[] = {
+		{.addr = fe->id,	.flags = 0,	.buf = buf,	.len = 2,},
+	};
+	return i2c_transfer(d->i2c, msg, 1) == 1;
+}
+
+u64 tc90522_n2int(const u8 *data, u8 n)		/* convert n_bytes data from stream (network byte order) to integer */
+{						/* can't use <arpa/inet.h>'s ntoh*() as sometimes n = 3,5,...       */
+	u32 i, val = 0;
+
+	for (i = 0; i < n; i++) {
+		val <<= 8;
+		val |= data[i];
+	}
+	return val;
+}
+
+int tc90522_cn_raw(struct dvb_frontend *fe, u16 *raw)	/* for DVBv3 compatibility	*/
+{
+	u8	buf[3],
+		len	= fe->dtv_property_cache.delivery_system == SYS_ISDBS ? 2 : 3,
+		adr	= fe->dtv_property_cache.delivery_system == SYS_ISDBS ? 0xbc : 0x8b;
+	bool	ok	= tc90522_r(fe, adr, buf, len);
+	int	cn	= tc90522_n2int(buf, len);
+
+	if (!ok)
+		return -EIO;
+	*raw = cn;
+	return cn;
+}
+
+int tc90522_status(struct dvb_frontend *fe, enum fe_status *stat)
+{
+	struct tc90522			*d = fe->demodulator_priv;
+	struct dtv_frontend_properties	*c = &fe->dtv_property_cache;
+	u16	v16;
+	s64	raw	= tc90522_cn_raw(fe, &v16),
+		x,
+		y;
+
+	s64 cn_s(void)	/* @ .0001 dB */
+	{
+		raw -= 3000;
+		if (raw < 0)
+			raw = 0;
+		x = int_sqrt(raw << 20);
+		y = 16346ll * x - (143410ll << 16);
+		y = ((x * y) >> 16) + (502590ll << 16);
+		y = ((x * y) >> 16) - (889770ll << 16);
+		y = ((x * y) >> 16) + (895650ll << 16);
+		y = (588570ll << 16) - ((x * y) >> 16);
+		return y < 0 ? 0 : y >> 16;
+	}
+
+	s64 cn_t(void)	/* @ .0001 dB */
+	{
+		if (!raw)
+			return 0;
+		x = (1130911733ll - 10ll * intlog10(raw)) >> 2;
+		y = (x >> 2) - (x >> 6) + (x >> 8) + (x >> 9) - (x >> 10) + (x >> 11) + (x >> 12) - (16ll << 22);
+		y = ((x * y) >> 22) + (398ll << 22);
+		y = ((x * y) >> 22) + (5491ll << 22);
+		y = ((x * y) >> 22) + (30965ll << 22);
+		return y >> 22;
+	}
+
+	c->cnr.len		= 1;
+	c->cnr.stat[0].svalue	= fe->dtv_property_cache.delivery_system == SYS_ISDBS ? cn_s() : cn_t();
+	c->cnr.stat[0].scale	= FE_SCALE_DECIBEL;
+	*stat = d->stat;
+	return d->stat;
+}
+
+int tc90522_get_frontend_algo(struct dvb_frontend *fe)
+{
+	return DVBFE_ALGO_HW;
+}
+
+int tc90522_tune(struct dvb_frontend *fe, bool retune, u32 mode_flags, u32 *delay, enum fe_status *stat)
+{
+	u32 fno2kHz(u32 fno)
+	{
+		u32 chno;
+
+		if (fno < 12) {
+			chno = 1 + 2 * fno;		/* BS		*/
+			return 1049480 + 38360 * fno;
+		} else if (fno < 24) {
+			fno -= 12;
+			chno = 2 + 2 * fno;		/* CS110 right	*/
+			return 1613000 + 40000 * fno;
+		}
+		fno -= 24;
+		chno = 1 + 2 * fno;			/* CS110 left	*/
+		return 1593000 + 40000 * fno;
+	}
+
+	void s_kHz(u32 *f)
+	{
+		*f =	*f > 3000000 ? fno2kHz(14)	:	/* CNN etc.	*/
+			*f >= 1049480 ? *f		:
+			*f > 48 ? fno2kHz(4)		:	/* BS11 etc.	*/
+			fno2kHz(*f - 1);
+	}
+
+	u32 fno2Hz(u32 fno)
+	{
+		return	(fno > 112 ? 557 : 93 + 6 * fno + (fno < 12 ? 0 : fno < 17 ? 2 : fno < 63 ? 0 : 2)) * 1000000 + 142857;
+	}
+
+	void t_Hz(u32 *f)
+	{
+		*f =	*f >= 90000000	? *f			:	/* real_freq Hz	*/
+			*f > 255	? fno2Hz(77)		:	/* NHK		*/
+			*f > 127	? fno2Hz(*f - 128)	:	/* freqno (IO#)	*/
+			*f > 63	? (*f -= 64,				/* CATV		*/
+				*f > 22	? fno2Hz(*f - 1)	:	/* C23-C62	*/
+				*f > 12	? fno2Hz(*f - 10)	:	/* C13-C22	*/
+				fno2Hz(77))			:
+			*f > 62	? fno2Hz(77)			:
+			*f > 12	? fno2Hz(*f + 50)		:	/* 13-62	*/
+			*f > 3	? fno2Hz(*f +  9)		:	/*  4-12	*/
+			*f		? fno2Hz(*f -  1)	:	/*  1-3		*/
+			fno2Hz(77);
+	}
+	struct tc90522	*d		= fe->demodulator_priv;
+	u16		stream_id	= fe->dtv_property_cache.stream_id,
+			i		= 0xFFFF;
+	u8		data[16];
+
+	if (!retune)		/* once is enough */
+		return 0;
+	d->stat = 0;
+	if (fe->dtv_property_cache.delivery_system == SYS_ISDBT)
+		goto ISDBT;
+
+	s_kHz(&fe->dtv_property_cache.frequency);
+	if (fe->ops.tuner_ops.set_params(fe))
+		return -EIO;
+	while (i--) {
+		if	((tc90522_r(fe, 0xC3, data, 1), !(data[0] & 0x10))	&&	/* locked	*/
+			(tc90522_r(fe, 0xCE, data, 2), *(u16 *)data != 0)	&&	/* valid TSID	*/
+			tc90522_r(fe, 0xC3, data, 1)				&&
+			tc90522_r(fe, 0xCE, data, 16))
+			break;
+		msleep_interruptible(1);
+	}
+	if (!i)
+		return -ETIMEDOUT;
+	for (i = 0; i < 8; i++) {
+		u16 tsid = tc90522_n2int(data + i*2, 2);
+
+		if ((tsid == stream_id || stream_id == i)	&&
+			tc90522_w(fe, 0x8F, tsid >> 8)		&&
+			tc90522_w(fe, 0x90, tsid & 0xFF)	&&
+			tc90522_r(fe, 0xE6, data, 2)		&&
+			tc90522_n2int(data, 2) == tsid)
+			goto LOCK;
+	}
+	goto ERR;
+ISDBT:
+	t_Hz(&fe->dtv_property_cache.frequency);
+	if (fe->ops.tuner_ops.set_params(fe))
+		return -EIO;
+	while (i--) {
+		bool	retryov,
+			lock0,
+			lock1;
+		if (!tc90522_r(fe, 0x80, data, 1) || !tc90522_r(fe, 0xB0, data + 1, 1))
+			break;
+		retryov	= data[0] & 0b10000000 ? true : false;
+		lock0	= data[0] & 0b00001000 ? false : true;
+		lock1	= data[1] & 0b00001000 ? true : false;
+		if (lock0 && lock1) {
+LOCK:
+			d->stat = FE_HAS_SIGNAL | FE_HAS_CARRIER | FE_HAS_LOCK;
+			*stat = d->stat;
+			return 0;
+		}
+		if (retryov)
+			break;
+		msleep_interruptible(1);
+	}
+ERR:
+	*stat = d->stat;
+	return -ETIMEDOUT;
+}
+
+static struct dvb_frontend_ops tc90522_ops = {
+	.info = {
+		.name = TC90522_MODNAME,
+		.caps = FE_CAN_INVERSION_AUTO | FE_CAN_FEC_AUTO | FE_CAN_QAM_AUTO | FE_CAN_MULTISTREAM |
+			FE_CAN_TRANSMISSION_MODE_AUTO | FE_CAN_GUARD_INTERVAL_AUTO | FE_CAN_HIERARCHY_AUTO,
+		.frequency_min	= 1,
+		.frequency_max	= 770000000,
+	},
+	.get_frontend_algo = tc90522_get_frontend_algo,
+	.read_snr	= tc90522_cn_raw,
+	.read_status	= tc90522_status,
+	.tune		= tc90522_tune,
+};
+
+int tc90522_probe(struct i2c_client *c, const struct i2c_device_id *id)
+{
+	struct tc90522		*d	= kzalloc(sizeof(struct tc90522), GFP_KERNEL);
+	struct dvb_frontend	*fe	= c->dev.platform_data;
+
+	if (!d)
+		return -ENOMEM;
+	d->i2c			= c->adapter;
+	fe->demodulator_priv	= d;
+	i2c_set_clientdata(c, d);
+	memcpy(&fe->ops, &tc90522_ops, sizeof(struct dvb_frontend_ops));
+	fe->ops.delsys[0] = fe->dtv_property_cache.delivery_system;
+	return 0;
+}
+
+int tc90522_remove(struct i2c_client *c)
+{
+	kfree(i2c_get_clientdata(c));
+	return 0;
+}
+
+static struct i2c_device_id tc90522_id[] = {
+	{TC90522_MODNAME, 0},
+	{},
+};
+MODULE_DEVICE_TABLE(i2c, tc90522_id);
+
+static struct i2c_driver tc90522_driver = {
+	.driver.name	= tc90522_id->name,
+	.probe		= tc90522_probe,
+	.remove		= tc90522_remove,
+	.id_table	= tc90522_id,
+};
+module_i2c_driver(tc90522_driver);
+
+MODULE_AUTHOR("Budi Rachmanto, AreMa Inc. <knightrider(@)are.ma>");
+MODULE_DESCRIPTION("Toshiba TC90522 8PSK(ISDB-S)/OFDM(ISDB-T) quad demodulator");
+MODULE_LICENSE("GPL");
+
diff --git a/drivers/media/dvb-frontends/tc90522.h b/drivers/media/dvb-frontends/tc90522.h
new file mode 100644
index 0000000..b6ee014
--- /dev/null
+++ b/drivers/media/dvb-frontends/tc90522.h
@@ -0,0 +1,18 @@
+/*
+ * Toshiba TC90522XBG 2ch OFDM(ISDB-T) + 2ch 8PSK(ISDB-S) demodulator
+ *
+ * Copyright (C) Budi Rachmanto, AreMa Inc. <info@....ma>
+ *
+ * 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.
+ */
+
+#ifndef	TC90522_H
+#define	TC90522_H
+
+#define TC90522_MODNAME "tc90522"
+
+#endif
+
-- 
2.3.10

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