drivers/media/dvb-frontends/mn88473.c - SHIFTPHONES/mainline/linux - Gitiles

 /*
  * Panasonic MN88473 DVB-T/T2/C demodulator driver
  *
  * Copyright (C) 2014 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 "mn88473_priv.h"

 static struct dvb_frontend_ops mn88473_ops;

 /* write multiple registers */
 static int mn88473_wregs(struct mn88473_dev *dev, 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(dev->i2c, msg, 1);
 	if (ret == 1) {
 		ret = 0;
 	} else {
 		dev_warn(&dev->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 mn88473_rregs(struct mn88473_dev *dev, 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(dev->i2c, msg, 2);
 	if (ret == 2) {
 		memcpy(val, buf, len);
 		ret = 0;
 	} else {
 		dev_warn(&dev->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 mn88473_wreg(struct mn88473_dev *dev, u16 reg, u8 val)
 {
 	return mn88473_wregs(dev, reg, &val, 1);
 }

 /* read single register */
 static int mn88473_rreg(struct mn88473_dev *dev, u16 reg, u8 *val)
 {
 	return mn88473_rregs(dev, reg, val, 1);
 }

 static int mn88473_get_tune_settings(struct dvb_frontend *fe,
 	struct dvb_frontend_tune_settings *s)
 {
 	s->min_delay_ms = 1000;
 	return 0;
 }

 static int mn88473_set_frontend(struct dvb_frontend *fe)
 {
 	struct mn88473_dev *dev = fe->demodulator_priv;
 	struct dtv_frontend_properties *c = &fe->dtv_property_cache;
 	int ret, i;
 	u32 if_frequency = 0;
 	u8 params[10], delivery_system;

 	dev_dbg(&dev->i2c->dev,
 			"%s: delivery_system=%u modulation=%u frequency=%u bandwidth_hz=%u symbol_rate=%u inversion=%d stream_id=%d\n",
 			__func__, c->delivery_system, c->modulation,
 			c->frequency, c->bandwidth_hz, c->symbol_rate,
 			c->inversion, c->stream_id);

 	if (!dev->warm) {
 		ret = -EAGAIN;
 		goto err;
 	}

 	switch (c->delivery_system) {
 	case SYS_DVBT:
 		delivery_system = 0x02;
 		if (c->bandwidth_hz <= 7000000)
 			memcpy(params, "\x2e\xcb\xfb\xc8\x00\x00\x17\x0a\x17\x0a", 10);
 		else if (c->bandwidth_hz <= 8000000)
 			memcpy(params, "\x2e\xcb\xfb\xaf\x00\x00\x11\xec\x11\xec", 10);
 		break;
 	case SYS_DVBT2:
 		delivery_system = 0x03;
 		if (c->bandwidth_hz <= 7000000)
 			memcpy(params, "\x2e\xcb\xfb\xc8\x00\x00\x17\x0a\x17\x0a", 10);
 		else if (c->bandwidth_hz <= 8000000)
 			memcpy(params, "\x2e\xcb\xfb\xaf\x00\x00\x11\xec\x11\xec", 10);
 		break;
 	case SYS_DVBC_ANNEX_A:
 		delivery_system = 0x04;
 		memcpy(params, "\x33\xea\xb3\xaf\x00\x00\x11\xec\x11\xec", 10);
 		break;
 	default:
 		ret = -EINVAL;
 		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(&dev->i2c->dev, "%s: get_if_frequency=%d\n",
 				__func__, if_frequency);
 	}

 	switch (if_frequency) {
 	case 4570000:
 	case 5070000:
 		break;
 	default:
 		dev_err(&dev->i2c->dev, "%s: IF frequency %d not supported\n",
 				KBUILD_MODNAME, if_frequency);
 		ret = -EINVAL;
 		goto err;
 	}

 	ret = mn88473_wregs(dev, 0x1c05, "\x00", 1);
 	ret = mn88473_wregs(dev, 0x1cfb, "\x13", 1);
 	ret = mn88473_wregs(dev, 0x1cef, "\x13", 1);
 	ret = mn88473_wregs(dev, 0x1cf9, "\x13", 1);
 	ret = mn88473_wregs(dev, 0x1c00, "\x18", 1);
 	ret = mn88473_wregs(dev, 0x1c01, "\x01", 1);
 	ret = mn88473_wregs(dev, 0x1c02, "\x21", 1);
 	ret = mn88473_wreg(dev, 0x1c03, delivery_system);
 	ret = mn88473_wregs(dev, 0x1c0b, "\x00", 1);

 	for (i = 0; i < 10; i++) {
 		ret = mn88473_wreg(dev, 0x1c10 + i, params[i]);
 		if (ret)
 			goto err;
 	}

 	ret = mn88473_wregs(dev, 0x1c2d, "\x3b", 1);
 	ret = mn88473_wregs(dev, 0x1c2e, "\x00", 1);
 	ret = mn88473_wregs(dev, 0x1c56, "\x0d", 1);
 	ret = mn88473_wregs(dev, 0x1801, "\xba", 1);
 	ret = mn88473_wregs(dev, 0x1802, "\x13", 1);
 	ret = mn88473_wregs(dev, 0x1803, "\x80", 1);
 	ret = mn88473_wregs(dev, 0x1804, "\xba", 1);
 	ret = mn88473_wregs(dev, 0x1805, "\x91", 1);
 	ret = mn88473_wregs(dev, 0x1807, "\xe7", 1);
 	ret = mn88473_wregs(dev, 0x1808, "\x28", 1);
 	ret = mn88473_wregs(dev, 0x180a, "\x1a", 1);
 	ret = mn88473_wregs(dev, 0x1813, "\x1f", 1);
 	ret = mn88473_wregs(dev, 0x1819, "\x03", 1);
 	ret = mn88473_wregs(dev, 0x181d, "\xb0", 1);
 	ret = mn88473_wregs(dev, 0x182a, "\x72", 1);
 	ret = mn88473_wregs(dev, 0x182d, "\x00", 1);
 	ret = mn88473_wregs(dev, 0x183c, "\x00", 1);
 	ret = mn88473_wregs(dev, 0x183f, "\xf8", 1);
 	ret = mn88473_wregs(dev, 0x1840, "\xf4", 1);
 	ret = mn88473_wregs(dev, 0x1841, "\x08", 1);
 	ret = mn88473_wregs(dev, 0x18d2, "\x29", 1);
 	ret = mn88473_wregs(dev, 0x18d4, "\x55", 1);
 	ret = mn88473_wregs(dev, 0x1a10, "\x10", 1);
 	ret = mn88473_wregs(dev, 0x1a11, "\xab", 1);
 	ret = mn88473_wregs(dev, 0x1a12, "\x0d", 1);
 	ret = mn88473_wregs(dev, 0x1a13, "\xae", 1);
 	ret = mn88473_wregs(dev, 0x1a14, "\x1d", 1);
 	ret = mn88473_wregs(dev, 0x1a15, "\x9d", 1);
 	ret = mn88473_wregs(dev, 0x1abe, "\x08", 1);
 	ret = mn88473_wregs(dev, 0x1c09, "\x08", 1);
 	ret = mn88473_wregs(dev, 0x1c08, "\x1d", 1);
 	ret = mn88473_wregs(dev, 0x18b2, "\x37", 1);
 	ret = mn88473_wregs(dev, 0x18d7, "\x04", 1);
 	ret = mn88473_wregs(dev, 0x1c32, "\x80", 1);
 	ret = mn88473_wregs(dev, 0x1c36, "\x00", 1);
 	ret = mn88473_wregs(dev, 0x1cf8, "\x9f", 1);
 	if (ret)
 		goto err;

 	dev->delivery_system = c->delivery_system;

 	return 0;
 err:
 	dev_dbg(&dev->i2c->dev, "%s: failed=%d\n", __func__, ret);
 	return ret;
 }

 static int mn88473_read_status(struct dvb_frontend *fe, fe_status_t *status)
 {
 	struct mn88473_dev *dev = fe->demodulator_priv;
 	int ret;

 	*status = 0;

 	if (!dev->warm) {
 		ret = -EAGAIN;
 		goto err;
 	}

 	*status = FE_HAS_SIGNAL | FE_HAS_CARRIER | FE_HAS_VITERBI |
 			FE_HAS_SYNC | FE_HAS_LOCK;

 	return 0;
 err:
 	dev_dbg(&dev->i2c->dev, "%s: failed=%d\n", __func__, ret);
 	return ret;
 }

 static int mn88473_init(struct dvb_frontend *fe)
 {
 	struct mn88473_dev *dev = fe->demodulator_priv;
 	int ret, len, remaining;
 	const struct firmware *fw = NULL;
 	u8 *fw_file = MN88473_FIRMWARE;

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

 	if (dev->warm)
 		return 0;

 	/* request the firmware, this will block and timeout */
 	ret = request_firmware(&fw, fw_file, dev->i2c->dev.parent);
 	if (ret) {
 		dev_err(&dev->i2c->dev, "%s: firmare file '%s' not found\n",
 				KBUILD_MODNAME, fw_file);
 		goto err;
 	}

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

 	ret = mn88473_wreg(dev, 0x18f5, 0x03);
 	if (ret)
 		goto err;

 	for (remaining = fw->size; remaining > 0;
 			remaining -= (dev->cfg->i2c_wr_max - 1)) {
 		len = remaining;
 		if (len > (dev->cfg->i2c_wr_max - 1))
 			len = (dev->cfg->i2c_wr_max - 1);

 		ret = mn88473_wregs(dev, 0x18f6,
 				&fw->data[fw->size - remaining], len);
 		if (ret) {
 			dev_err(&dev->i2c->dev,
 					"%s: firmware download failed=%d\n",
 					KBUILD_MODNAME, ret);
 			goto err;
 		}
 	}

 	ret = mn88473_wreg(dev, 0x18f5, 0x00);
 	if (ret)
 		goto err;

 	release_firmware(fw);
 	fw = NULL;

 	/* warm state */
 	dev->warm = true;

 	return 0;
 err:
 	if (fw)
 		release_firmware(fw);

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

 static int mn88473_sleep(struct dvb_frontend *fe)
 {
 	struct mn88473_dev *dev = fe->demodulator_priv;
 	int ret;

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

 	ret = mn88473_wreg(dev, 0x1c05, 0x3e);
 	if (ret)
 		goto err;

 	dev->delivery_system = SYS_UNDEFINED;

 	return 0;
 err:
 	dev_dbg(&dev->i2c->dev, "%s: failed=%d\n", __func__, ret);
 	return ret;
 }

 static void mn88473_release(struct dvb_frontend *fe)
 {
 	struct mn88473_dev *dev = fe->demodulator_priv;
 	kfree(dev);
 }

 struct dvb_frontend *mn88473_attach(const struct mn88473_config *cfg,
 		struct i2c_adapter *i2c)
 {
 	int ret;
 	struct mn88473_dev *dev;
 	u8 u8tmp;

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

 	/* allocate memory for the internal state */
 	dev = kzalloc(sizeof(struct mn88473_dev), GFP_KERNEL);
 	if (!dev) {
 		ret = -ENOMEM;
 		dev_err(&i2c->dev, "%s: kzalloc() failed\n", KBUILD_MODNAME);
 		goto err;
 	}

 	dev->cfg = cfg;
 	dev->i2c = i2c;

 	/* check demod responds to I2C */
 	ret = mn88473_rreg(dev, 0x1c00, &u8tmp);
 	if (ret)
 		goto err;

 	/* create dvb_frontend */
 	memcpy(&dev->fe.ops, &mn88473_ops, sizeof(struct dvb_frontend_ops));
 	dev->fe.demodulator_priv = dev;

 	return &dev->fe;
 err:
 	dev_dbg(&i2c->dev, "%s: failed=%d\n", __func__, ret);
 	kfree(dev);
 	return NULL;
 }
 EXPORT_SYMBOL(mn88473_attach);

 static struct dvb_frontend_ops mn88473_ops = {
 	.delsys = {SYS_DVBT, SYS_DVBT2, SYS_DVBC_ANNEX_AC},
 	.info = {
 		.name = "Panasonic MN88473",
 		.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 = mn88473_release,

 	.get_tune_settings = mn88473_get_tune_settings,

 	.init = mn88473_init,
 	.sleep = mn88473_sleep,

 	.set_frontend = mn88473_set_frontend,

 	.read_status = mn88473_read_status,
 };

 MODULE_AUTHOR("Antti Palosaari <crope@iki.fi>");
 MODULE_DESCRIPTION("Panasonic MN88473 DVB-T/T2/C demodulator driver");
 MODULE_LICENSE("GPL");
 MODULE_FIRMWARE(MN88473_FIRMWARE);
	/*
	* Panasonic MN88473 DVB-T/T2/C demodulator driver
	*
	* Copyright (C) 2014 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 "mn88473_priv.h"

	static struct dvb_frontend_ops mn88473_ops;

	/* write multiple registers */
	static int mn88473_wregs(struct mn88473_dev dev, 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(dev->i2c, msg, 1);
	if (ret == 1) {
	ret = 0;
	} else {
	dev_warn(&dev->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 mn88473_rregs(struct mn88473_dev dev, 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(dev->i2c, msg, 2);
	if (ret == 2) {
	memcpy(val, buf, len);
	ret = 0;
	} else {
	dev_warn(&dev->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 mn88473_wreg(struct mn88473_dev *dev, u16 reg, u8 val)
	{
	return mn88473_wregs(dev, reg, &val, 1);
	}

	/* read single register */
	static int mn88473_rreg(struct mn88473_dev dev, u16 reg, u8 val)
	{
	return mn88473_rregs(dev, reg, val, 1);
	}

	static int mn88473_get_tune_settings(struct dvb_frontend *fe,
	struct dvb_frontend_tune_settings *s)
	{
	s->min_delay_ms = 1000;
	return 0;
	}

	static int mn88473_set_frontend(struct dvb_frontend *fe)
	{
	struct mn88473_dev *dev = fe->demodulator_priv;
	struct dtv_frontend_properties *c = &fe->dtv_property_cache;
	int ret, i;
	u32 if_frequency = 0;
	u8 params[10], delivery_system;

	dev_dbg(&dev->i2c->dev,
	"%s: delivery_system=%u modulation=%u frequency=%u bandwidth_hz=%u symbol_rate=%u inversion=%d stream_id=%d\n",
	__func__, c->delivery_system, c->modulation,
	c->frequency, c->bandwidth_hz, c->symbol_rate,
	c->inversion, c->stream_id);

	if (!dev->warm) {
	ret = -EAGAIN;
	goto err;
	}

	switch (c->delivery_system) {
	case SYS_DVBT:
	delivery_system = 0x02;
	if (c->bandwidth_hz <= 7000000)
	memcpy(params, "\x2e\xcb\xfb\xc8\x00\x00\x17\x0a\x17\x0a", 10);
	else if (c->bandwidth_hz <= 8000000)
	memcpy(params, "\x2e\xcb\xfb\xaf\x00\x00\x11\xec\x11\xec", 10);
	break;
	case SYS_DVBT2:
	delivery_system = 0x03;
	if (c->bandwidth_hz <= 7000000)
	memcpy(params, "\x2e\xcb\xfb\xc8\x00\x00\x17\x0a\x17\x0a", 10);
	else if (c->bandwidth_hz <= 8000000)
	memcpy(params, "\x2e\xcb\xfb\xaf\x00\x00\x11\xec\x11\xec", 10);
	break;
	case SYS_DVBC_ANNEX_A:
	delivery_system = 0x04;
	memcpy(params, "\x33\xea\xb3\xaf\x00\x00\x11\xec\x11\xec", 10);
	break;
	default:
	ret = -EINVAL;
	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(&dev->i2c->dev, "%s: get_if_frequency=%d\n",
	__func__, if_frequency);
	}

	switch (if_frequency) {
	case 4570000:
	case 5070000:
	break;
	default:
	dev_err(&dev->i2c->dev, "%s: IF frequency %d not supported\n",
	KBUILD_MODNAME, if_frequency);
	ret = -EINVAL;
	goto err;
	}

	ret = mn88473_wregs(dev, 0x1c05, "\x00", 1);
	ret = mn88473_wregs(dev, 0x1cfb, "\x13", 1);
	ret = mn88473_wregs(dev, 0x1cef, "\x13", 1);
	ret = mn88473_wregs(dev, 0x1cf9, "\x13", 1);
	ret = mn88473_wregs(dev, 0x1c00, "\x18", 1);
	ret = mn88473_wregs(dev, 0x1c01, "\x01", 1);
	ret = mn88473_wregs(dev, 0x1c02, "\x21", 1);
	ret = mn88473_wreg(dev, 0x1c03, delivery_system);
	ret = mn88473_wregs(dev, 0x1c0b, "\x00", 1);

	for (i = 0; i < 10; i++) {
	ret = mn88473_wreg(dev, 0x1c10 + i, params[i]);
	if (ret)
	goto err;
	}

	ret = mn88473_wregs(dev, 0x1c2d, "\x3b", 1);
	ret = mn88473_wregs(dev, 0x1c2e, "\x00", 1);
	ret = mn88473_wregs(dev, 0x1c56, "\x0d", 1);
	ret = mn88473_wregs(dev, 0x1801, "\xba", 1);
	ret = mn88473_wregs(dev, 0x1802, "\x13", 1);
	ret = mn88473_wregs(dev, 0x1803, "\x80", 1);
	ret = mn88473_wregs(dev, 0x1804, "\xba", 1);
	ret = mn88473_wregs(dev, 0x1805, "\x91", 1);
	ret = mn88473_wregs(dev, 0x1807, "\xe7", 1);
	ret = mn88473_wregs(dev, 0x1808, "\x28", 1);
	ret = mn88473_wregs(dev, 0x180a, "\x1a", 1);
	ret = mn88473_wregs(dev, 0x1813, "\x1f", 1);
	ret = mn88473_wregs(dev, 0x1819, "\x03", 1);
	ret = mn88473_wregs(dev, 0x181d, "\xb0", 1);
	ret = mn88473_wregs(dev, 0x182a, "\x72", 1);
	ret = mn88473_wregs(dev, 0x182d, "\x00", 1);
	ret = mn88473_wregs(dev, 0x183c, "\x00", 1);
	ret = mn88473_wregs(dev, 0x183f, "\xf8", 1);
	ret = mn88473_wregs(dev, 0x1840, "\xf4", 1);
	ret = mn88473_wregs(dev, 0x1841, "\x08", 1);
	ret = mn88473_wregs(dev, 0x18d2, "\x29", 1);
	ret = mn88473_wregs(dev, 0x18d4, "\x55", 1);
	ret = mn88473_wregs(dev, 0x1a10, "\x10", 1);
	ret = mn88473_wregs(dev, 0x1a11, "\xab", 1);
	ret = mn88473_wregs(dev, 0x1a12, "\x0d", 1);
	ret = mn88473_wregs(dev, 0x1a13, "\xae", 1);
	ret = mn88473_wregs(dev, 0x1a14, "\x1d", 1);
	ret = mn88473_wregs(dev, 0x1a15, "\x9d", 1);
	ret = mn88473_wregs(dev, 0x1abe, "\x08", 1);
	ret = mn88473_wregs(dev, 0x1c09, "\x08", 1);
	ret = mn88473_wregs(dev, 0x1c08, "\x1d", 1);
	ret = mn88473_wregs(dev, 0x18b2, "\x37", 1);
	ret = mn88473_wregs(dev, 0x18d7, "\x04", 1);
	ret = mn88473_wregs(dev, 0x1c32, "\x80", 1);
	ret = mn88473_wregs(dev, 0x1c36, "\x00", 1);
	ret = mn88473_wregs(dev, 0x1cf8, "\x9f", 1);
	if (ret)
	goto err;

	dev->delivery_system = c->delivery_system;

	return 0;
	err:
	dev_dbg(&dev->i2c->dev, "%s: failed=%d\n", __func__, ret);
	return ret;
	}

	static int mn88473_read_status(struct dvb_frontend fe, fe_status_t status)
	{
	struct mn88473_dev *dev = fe->demodulator_priv;
	int ret;

	*status = 0;

	if (!dev->warm) {
	ret = -EAGAIN;
	goto err;
	}

	*status = FE_HAS_SIGNAL \| FE_HAS_CARRIER \| FE_HAS_VITERBI \|
	FE_HAS_SYNC \| FE_HAS_LOCK;

	return 0;
	err:
	dev_dbg(&dev->i2c->dev, "%s: failed=%d\n", __func__, ret);
	return ret;
	}

	static int mn88473_init(struct dvb_frontend *fe)
	{
	struct mn88473_dev *dev = fe->demodulator_priv;
	int ret, len, remaining;
	const struct firmware *fw = NULL;
	u8 *fw_file = MN88473_FIRMWARE;

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

	if (dev->warm)
	return 0;

	/* request the firmware, this will block and timeout */
	ret = request_firmware(&fw, fw_file, dev->i2c->dev.parent);
	if (ret) {
	dev_err(&dev->i2c->dev, "%s: firmare file '%s' not found\n",
	KBUILD_MODNAME, fw_file);
	goto err;
	}

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

	ret = mn88473_wreg(dev, 0x18f5, 0x03);
	if (ret)
	goto err;

	for (remaining = fw->size; remaining > 0;
	remaining -= (dev->cfg->i2c_wr_max - 1)) {
	len = remaining;
	if (len > (dev->cfg->i2c_wr_max - 1))
	len = (dev->cfg->i2c_wr_max - 1);

	ret = mn88473_wregs(dev, 0x18f6,
	&fw->data[fw->size - remaining], len);
	if (ret) {
	dev_err(&dev->i2c->dev,
	"%s: firmware download failed=%d\n",
	KBUILD_MODNAME, ret);
	goto err;
	}
	}

	ret = mn88473_wreg(dev, 0x18f5, 0x00);
	if (ret)
	goto err;

	release_firmware(fw);
	fw = NULL;

	/* warm state */
	dev->warm = true;

	return 0;
	err:
	if (fw)
	release_firmware(fw);

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

	static int mn88473_sleep(struct dvb_frontend *fe)
	{
	struct mn88473_dev *dev = fe->demodulator_priv;
	int ret;

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

	ret = mn88473_wreg(dev, 0x1c05, 0x3e);
	if (ret)
	goto err;

	dev->delivery_system = SYS_UNDEFINED;

	return 0;
	err:
	dev_dbg(&dev->i2c->dev, "%s: failed=%d\n", __func__, ret);
	return ret;
	}

	static void mn88473_release(struct dvb_frontend *fe)
	{
	struct mn88473_dev *dev = fe->demodulator_priv;
	kfree(dev);
	}

	struct dvb_frontend mn88473_attach(const struct mn88473_config cfg,
	struct i2c_adapter *i2c)
	{
	int ret;
	struct mn88473_dev *dev;
	u8 u8tmp;

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

	/* allocate memory for the internal state */
	dev = kzalloc(sizeof(struct mn88473_dev), GFP_KERNEL);
	if (!dev) {
	ret = -ENOMEM;
	dev_err(&i2c->dev, "%s: kzalloc() failed\n", KBUILD_MODNAME);
	goto err;
	}

	dev->cfg = cfg;
	dev->i2c = i2c;

	/* check demod responds to I2C */
	ret = mn88473_rreg(dev, 0x1c00, &u8tmp);
	if (ret)
	goto err;

	/* create dvb_frontend */
	memcpy(&dev->fe.ops, &mn88473_ops, sizeof(struct dvb_frontend_ops));
	dev->fe.demodulator_priv = dev;

	return &dev->fe;
	err:
	dev_dbg(&i2c->dev, "%s: failed=%d\n", __func__, ret);
	kfree(dev);
	return NULL;
	}
	EXPORT_SYMBOL(mn88473_attach);

	static struct dvb_frontend_ops mn88473_ops = {
	.delsys = {SYS_DVBT, SYS_DVBT2, SYS_DVBC_ANNEX_AC},
	.info = {
	.name = "Panasonic MN88473",
	.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 = mn88473_release,

	.get_tune_settings = mn88473_get_tune_settings,

	.init = mn88473_init,
	.sleep = mn88473_sleep,

	.set_frontend = mn88473_set_frontend,

	.read_status = mn88473_read_status,
	};

	MODULE_AUTHOR("Antti Palosaari <crope@iki.fi>");
	MODULE_DESCRIPTION("Panasonic MN88473 DVB-T/T2/C demodulator driver");
	MODULE_LICENSE("GPL");
	MODULE_FIRMWARE(MN88473_FIRMWARE);