Commit ca25cb54 authored by Antti Palosaari's avatar Antti Palosaari Committed by Mauro Carvalho Chehab
Browse files

[media] mn88472: Panasonic MN88472 demod driver (DVB-C only) 



Only DVB-C mode is supported, DVB-T and DVB-T2 are not supported.
Very much feature reduced version, no signal statistics nor normal
chip configuration options.

Signed-off-by: default avatarAntti Palosaari <crope@iki.fi>
Signed-off-by: default avatarMauro Carvalho Chehab <mchehab@osg.samsung.com>
parent dd0a6fe2

drivers/media/dvb-frontends/Kconfig

+7 −0
Original line number Diff line number Diff line
@@ -441,6 +441,13 @@ config DVB_CXD2820R 
	help

	  Say Y when you want to support this frontend.



config DVB_MN88472

	tristate "Panasonic MN88472"

	depends on DVB_CORE && I2C

	default m if !MEDIA_SUBDRV_AUTOSELECT

	help

	  Say Y when you want to support this frontend.



config DVB_RTL2830

	tristate "Realtek RTL2830 DVB-T"

	depends on DVB_CORE && I2C

drivers/media/dvb-frontends/Makefile

+2 −0
Original line number Diff line number Diff line
@@ -15,6 +15,7 @@ stv0900-objs := stv0900_core.o stv0900_sw.o 
drxd-objs := drxd_firm.o drxd_hard.o

cxd2820r-objs := cxd2820r_core.o cxd2820r_c.o cxd2820r_t.o cxd2820r_t2.o

drxk-objs := drxk_hard.o

mn88472-objs := mn88472_c.o



obj-$(CONFIG_DVB_PLL) += dvb-pll.o

obj-$(CONFIG_DVB_STV0299) += stv0299.o
@@ -103,6 +104,7 @@ obj-$(CONFIG_DVB_MB86A20S) += mb86a20s.o 
obj-$(CONFIG_DVB_IX2505V) += ix2505v.o

obj-$(CONFIG_DVB_STV0367) += stv0367.o

obj-$(CONFIG_DVB_CXD2820R) += cxd2820r.o

obj-$(CONFIG_DVB_MN88472) += mn88472.o

obj-$(CONFIG_DVB_DRXK) += drxk.o

obj-$(CONFIG_DVB_TDA18271C2DD) += tda18271c2dd.o

obj-$(CONFIG_DVB_SI2165) += si2165.o

drivers/media/dvb-frontends/mn88472.h

0 → 100644
+46 −0
Original line number Diff line number Diff line 
/*

 * Panasonic MN88472 DVB-T/T2/C demodulator driver

 *

 * Copyright (C) 2013 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.

 */



#ifndef MN88472_H

#define MN88472_H



#include <linux/dvb/frontend.h>



struct mn88472_c_config {

	/*

	 * max bytes I2C client could write

	 * Value must be set.

	 */

	int i2c_wr_max;

};



#if IS_ENABLED(CONFIG_DVB_MN88472)

extern struct dvb_frontend *mn88472_c_attach(

	const struct mn88472_c_config *cfg,

	struct i2c_adapter *i2c

);

#else

static inline struct dvb_frontend *mn88472_c_attach(

	const struct mn88472_c_config *cfg,

	struct i2c_adapter *i2c

)

{

	dev_warn(&i2c->dev, "%s: driver disabled by Kconfig\n", __func__);

	return NULL;

}

#endif



#endif

drivers/media/dvb-frontends/mn88472_c.c

0 → 100644
+414 −0
Original line number Diff line number Diff line 
/*

 * Panasonic MN88472 DVB-T/T2/C demodulator driver

 *

 * Copyright (C) 2013 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.

 */



#include "mn88472_priv.h"



static struct dvb_frontend_ops mn88472_ops_c;



/* write multiple registers */

static int mn88472_wregs(struct mn88472_state *s, u16 reg, const u8 *val, int len)

{

#define MAX_WR_LEN 21

#define MAX_WR_XFER_LEN (MAX_WR_LEN + 1)

	int ret;

	u8 buf[MAX_WR_XFER_LEN];

	struct i2c_msg msg[1] = {

		{

			.addr = (reg >> 8) & 0xff,

			.flags = 0,

			.len = 1 + len,

			.buf = buf,

		}

	};



	if (WARN_ON(len > MAX_WR_LEN))

		return -EINVAL;



	buf[0] = (reg >> 0) & 0xff;

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



	ret = i2c_transfer(s->i2c, msg, 1);

	if (ret == 1) {

		ret = 0;

	} else {

		dev_warn(&s->i2c->dev,

				"%s: i2c wr failed=%d reg=%02x len=%d\n",

				KBUILD_MODNAME, ret, reg, len);

		ret = -EREMOTEIO;

	}



	return ret;

}



/* read multiple registers */

static int mn88472_rregs(struct mn88472_state *s, u16 reg, u8 *val, int len)

{

#define MAX_RD_LEN 2

#define MAX_RD_XFER_LEN (MAX_RD_LEN)

	int ret;

	u8 buf[MAX_RD_XFER_LEN];

	struct i2c_msg msg[2] = {

		{

			.addr = (reg >> 8) & 0xff,

			.flags = 0,

			.len = 1,

			.buf = buf,

		}, {

			.addr = (reg >> 8) & 0xff,

			.flags = I2C_M_RD,

			.len = len,

			.buf = buf,

		}

	};



	if (WARN_ON(len > MAX_RD_LEN))

		return -EINVAL;



	buf[0] = (reg >> 0) & 0xff;



	ret = i2c_transfer(s->i2c, msg, 2);

	if (ret == 2) {

		memcpy(val, buf, len);

		ret = 0;

	} else {

		dev_warn(&s->i2c->dev,

				"%s: i2c rd failed=%d reg=%02x len=%d\n",

				KBUILD_MODNAME, ret, reg, len);

		ret = -EREMOTEIO;

	}



	return ret;

}



/* write single register */

static int mn88472_wreg(struct mn88472_state *s, u16 reg, u8 val)

{

	return mn88472_wregs(s, reg, &val, 1);

}



/* read single register */

static int mn88472_rreg(struct mn88472_state *s, u16 reg, u8 *val)

{

	return mn88472_rregs(s, reg, val, 1);

}



static int mn88472_set_frontend_c(struct dvb_frontend *fe)

{

	struct mn88472_state *s = fe->demodulator_priv;

	struct dtv_frontend_properties *c = &fe->dtv_property_cache;

	int ret;

	u32 if_frequency = 0;

	dev_dbg(&s->i2c->dev,

			"%s: delivery_system=%d modulation=%d frequency=%d symbol_rate=%d inversion=%d\n",

			__func__, c->delivery_system, c->modulation,

			c->frequency, c->symbol_rate, c->inversion);



	if (!s->warm) {

		ret = -EAGAIN;

		goto err;

	}



	/* program tuner */

	if (fe->ops.tuner_ops.set_params) {

		ret = fe->ops.tuner_ops.set_params(fe);

		if (ret)

			goto err;

	}



	if (fe->ops.tuner_ops.get_if_frequency) {

		ret = fe->ops.tuner_ops.get_if_frequency(fe, &if_frequency);

		if (ret)

			goto err;



		dev_dbg(&s->i2c->dev, "%s: get_if_frequency=%d\n",

				__func__, if_frequency);

	}



	if (if_frequency != 5070000) {

		dev_err(&s->i2c->dev, "%s: IF frequency %d not supported\n",

				KBUILD_MODNAME, if_frequency);

		ret = -EINVAL;

		goto err;

	}



	ret = mn88472_wregs(s, 0x1c08, "\x1d", 1);

	if (ret)

		goto err;



	ret = mn88472_wregs(s, 0x18d9, "\xe3", 1);

	if (ret)

		goto err;



	ret = mn88472_wregs(s, 0x1c83, "\x01", 1);

	if (ret)

		goto err;



	ret = mn88472_wregs(s, 0x1c00, "\x66\x00\x01\x04\x00", 5);

	if (ret)

		goto err;



	ret = mn88472_wregs(s, 0x1c10,

			"\x3f\x50\x2c\x8f\x80\x00\x08\xee\x08\xee", 10);

	if (ret)

		goto err;



	ret = mn88472_wregs(s, 0x1846, "\x00", 1);

	if (ret)

		goto err;



	ret = mn88472_wregs(s, 0x18ae, "\x00", 1);

	if (ret)

		goto err;



	ret = mn88472_wregs(s, 0x18b0, "\x0b", 1);

	if (ret)

		goto err;



	ret = mn88472_wregs(s, 0x18b4, "\x00", 1);

	if (ret)

		goto err;



	ret = mn88472_wregs(s, 0x18cd, "\x17", 1);

	if (ret)

		goto err;



	ret = mn88472_wregs(s, 0x18d4, "\x09", 1);

	if (ret)

		goto err;



	ret = mn88472_wregs(s, 0x18d6, "\x48", 1);

	if (ret)

		goto err;



	ret = mn88472_wregs(s, 0x1a00, "\xb0", 1);

	if (ret)

		goto err;



	ret = mn88472_wregs(s, 0x1cf8, "\x9f", 1);

	if (ret)

		goto err;



	s->delivery_system = c->delivery_system;



	return 0;

err:

	dev_dbg(&s->i2c->dev, "%s: failed=%d\n", __func__, ret);

	return ret;

}



static int mn88472_read_status_c(struct dvb_frontend *fe, fe_status_t *status)

{

	struct mn88472_state *s = fe->demodulator_priv;

	int ret;

	u8 u8tmp;



	*status = 0;



	if (!s->warm) {

		ret = -EAGAIN;

		goto err;

	}



	ret = mn88472_rreg(s, 0x1a84, &u8tmp);

	if (ret)

		goto err;



	if (u8tmp == 0x08)

		*status = FE_HAS_SIGNAL | FE_HAS_CARRIER | FE_HAS_VITERBI |

				FE_HAS_SYNC | FE_HAS_LOCK;



	return 0;

err:

	dev_dbg(&s->i2c->dev, "%s: failed=%d\n", __func__, ret);

	return ret;

}



static int mn88472_init_c(struct dvb_frontend *fe)

{

	struct mn88472_state *s = fe->demodulator_priv;

	int ret, len, remaining;

	const struct firmware *fw = NULL;

	u8 *fw_file = MN88472_FIRMWARE;

	dev_dbg(&s->i2c->dev, "%s:\n", __func__);



	/* set cold state by default */

	s->warm = false;



	/* power on */

	ret = mn88472_wreg(s, 0x1c05, 0x00);

	if (ret)

		goto err;



	ret = mn88472_wregs(s, 0x1c0b, "\x00\x00", 2);

	if (ret)

		goto err;



	/* request the firmware, this will block and timeout */

	ret = request_firmware(&fw, fw_file, s->i2c->dev.parent);

	if (ret) {

		dev_err(&s->i2c->dev, "%s: firmare file '%s' not found\n",

				KBUILD_MODNAME, fw_file);

		goto err;

	}



	dev_info(&s->i2c->dev, "%s: downloading firmware from file '%s'\n",

			KBUILD_MODNAME, fw_file);



	ret = mn88472_wreg(s, 0x18f5, 0x03);

	if (ret)

		goto err;



	for (remaining = fw->size; remaining > 0;

			remaining -= (s->cfg->i2c_wr_max - 1)) {

		len = remaining;

		if (len > (s->cfg->i2c_wr_max - 1))

			len = (s->cfg->i2c_wr_max - 1);



		ret = mn88472_wregs(s, 0x18f6,

				&fw->data[fw->size - remaining], len);

		if (ret) {

			dev_err(&s->i2c->dev,

					"%s: firmware download failed=%d\n",

					KBUILD_MODNAME, ret);

			goto err;

		}

	}



	ret = mn88472_wreg(s, 0x18f5, 0x00);

	if (ret)

		goto err;



	release_firmware(fw);

	fw = NULL;



	/* warm state */

	s->warm = true;



	return 0;

err:

	if (fw)

		release_firmware(fw);



	dev_dbg(&s->i2c->dev, "%s: failed=%d\n", __func__, ret);

	return ret;

}



static int mn88472_sleep_c(struct dvb_frontend *fe)

{

	struct mn88472_state *s = fe->demodulator_priv;

	int ret;

	dev_dbg(&s->i2c->dev, "%s:\n", __func__);



	/* power off */

	ret = mn88472_wreg(s, 0x1c0b, 0x30);

	if (ret)

		goto err;



	ret = mn88472_wreg(s, 0x1c05, 0x3e);

	if (ret)

		goto err;



	s->delivery_system = SYS_UNDEFINED;



	return 0;

err:

	dev_dbg(&s->i2c->dev, "%s: failed=%d\n", __func__, ret);

	return ret;

}



static void mn88472_release_c(struct dvb_frontend *fe)

{

	struct mn88472_state *s = fe->demodulator_priv;

	kfree(s);

}



struct dvb_frontend *mn88472_attach_c(const struct mn88472_c_config *cfg,

		struct i2c_adapter *i2c)

{

	int ret;

	struct mn88472_state *s;

	u8 u8tmp;

	dev_dbg(&i2c->dev, "%s:\n", __func__);



	/* allocate memory for the internal state */

	s = kzalloc(sizeof(struct mn88472_state), GFP_KERNEL);

	if (!s) {

		ret = -ENOMEM;

		dev_err(&i2c->dev, "%s: kzalloc() failed\n", KBUILD_MODNAME);

		goto err;

	}



	s->cfg = cfg;

	s->i2c = i2c;



	/* check demod responds to I2C */

	ret = mn88472_rreg(s, 0x1c00, &u8tmp);

	if (ret)

		goto err;



	/* create dvb_frontend */

	memcpy(&s->fe.ops, &mn88472_ops_c, sizeof(struct dvb_frontend_ops));

	s->fe.demodulator_priv = s;



	return &s->fe;

err:

	dev_dbg(&i2c->dev, "%s: failed=%d\n", __func__, ret);

	kfree(s);

	return NULL;

}

EXPORT_SYMBOL(mn88472_attach_c);



static struct dvb_frontend_ops mn88472_ops_c = {

	.delsys = {SYS_DVBC_ANNEX_A},

	.info = {

		.name = "Panasonic MN88472",

		.caps =	FE_CAN_FEC_1_2			|

			FE_CAN_FEC_2_3			|

			FE_CAN_FEC_3_4			|

			FE_CAN_FEC_5_6			|

			FE_CAN_FEC_7_8			|

			FE_CAN_FEC_AUTO			|

			FE_CAN_QPSK			|

			FE_CAN_QAM_16			|

			FE_CAN_QAM_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_HIERARCHY_AUTO		|

			FE_CAN_MUTE_TS			|

			FE_CAN_2G_MODULATION		|

			FE_CAN_MULTISTREAM

	},



	.release = mn88472_release_c,



	.init = mn88472_init_c,

	.sleep = mn88472_sleep_c,



	.set_frontend = mn88472_set_frontend_c,

/*	.get_frontend = mn88472_get_frontend_c, */



	.read_status = mn88472_read_status_c,

/*	.read_snr = mn88472_read_snr_c, */

};



MODULE_AUTHOR("Antti Palosaari <crope@iki.fi>");

MODULE_DESCRIPTION("Panasonic MN88472 DVB-T/T2/C demodulator driver");

MODULE_LICENSE("GPL");

MODULE_FIRMWARE(MN88472_FIRMWARE);

drivers/media/dvb-frontends/mn88472_priv.h

0 → 100644
+36 −0
Original line number Diff line number Diff line 
/*

 * Panasonic MN88472 DVB-T/T2/C demodulator driver

 *

 * Copyright (C) 2013 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.

 */



#ifndef MN88472_PRIV_H

#define MN88472_PRIV_H



#include "dvb_frontend.h"

#include "mn88472.h"

#include "dvb_math.h"

#include <linux/firmware.h>

#include <linux/i2c-mux.h>



#define MN88472_FIRMWARE "dvb-demod-mn88472-02.fw"



struct mn88472_state {

	struct i2c_adapter *i2c;

	const struct mn88472_c_config *cfg;

	struct dvb_frontend fe;

	fe_delivery_system_t delivery_system;

	bool warm; /* FW running */

};



#endif

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