ni-buildsystem/patches/kernel/vuplus/3_9_02-10-si2168-Silicon-Labs-Si2168-DVB-T-T2-C-demod-driver.patch

diff --git a/drivers/media/dvb-frontends/Kconfig b/drivers/media/dvb-frontends/Kconfig
index 025fc54..1469d44 100644
--- a/drivers/media/dvb-frontends/Kconfig
+++ b/drivers/media/dvb-frontends/Kconfig
@@ -432,6 +432,14 @@
 	help
 	  Say Y when you want to support this frontend.
 
+config DVB_SI2168
+	tristate "Silicon Labs Si2168"
+	depends on DVB_CORE && I2C && I2C_MUX
+	default m if !MEDIA_SUBDRV_AUTOSELECT
+	help
+	  Silicon Labs Si2168 DVB-T/T2/C demodulator driver.
+	  Say Y when you want to support these frontends.
+
 comment "DVB-C (cable) frontends"
 	depends on DVB_CORE
 
diff --git a/drivers/media/dvb-frontends/Makefile b/drivers/media/dvb-frontends/Makefile
index 282aba2..dda0bee 100644
--- a/drivers/media/dvb-frontends/Makefile
+++ b/drivers/media/dvb-frontends/Makefile
@@ -77,6 +77,7 @@
 obj-$(CONFIG_DVB_AF9013) += af9013.o
 obj-$(CONFIG_DVB_CX24116) += cx24116.o
 obj-$(CONFIG_DVB_SI21XX) += si21xx.o
+obj-$(CONFIG_DVB_SI2168) += si2168.o
 obj-$(CONFIG_DVB_STV0288) += stv0288.o
 obj-$(CONFIG_DVB_STB6000) += stb6000.o
 obj-$(CONFIG_DVB_S921) += s921.o
diff --git a/drivers/media/dvb-frontends/si2168.c b/drivers/media/dvb-frontends/si2168.c
new file mode 100644
index 0000000..eef4e45
--- /dev/null
+++ b/drivers/media/dvb-frontends/si2168.c
@@ -0,0 +1,773 @@
+/*
+ * Silicon Labs Si2168 DVB-T/T2/C demodulator driver
+ * Mod nikolasi for openatv
+ * 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 "si2168_priv.h"
+
+static const struct dvb_frontend_ops si2168_ops;
+
+/* execute firmware command */
+static int si2168_cmd_execute(struct i2c_client *client, struct si2168_cmd *cmd)
+{
+	struct si2168_dev *dev = i2c_get_clientdata(client);
+	int ret;
+	unsigned long timeout;
+
+	mutex_lock(&dev->i2c_mutex);
+
+	if (cmd->wlen) {
+		/* write cmd and args for firmware */
+		ret = i2c_master_send(client, cmd->args, cmd->wlen);
+		if (ret < 0) {
+			goto err_mutex_unlock;
+		} else if (ret != cmd->wlen) {
+			ret = -EREMOTEIO;
+			goto err_mutex_unlock;
+		}
+	}
+
+	if (cmd->rlen) {
+		/* wait cmd execution terminate */
+		#define TIMEOUT 70
+		timeout = jiffies + msecs_to_jiffies(TIMEOUT);
+		while (!time_after(jiffies, timeout)) {
+			ret = i2c_master_recv(client, cmd->args, cmd->rlen);
+			if (ret < 0) {
+				goto err_mutex_unlock;
+			} else if (ret != cmd->rlen) {
+				ret = -EREMOTEIO;
+				goto err_mutex_unlock;
+			}
+
+			/* firmware ready? */
+			if ((cmd->args[0] >> 7) & 0x01)
+				break;
+		}
+
+		dev_dbg(&client->dev, "cmd execution took %d ms\n",
+				jiffies_to_msecs(jiffies) -
+				(jiffies_to_msecs(timeout) - TIMEOUT));
+
+		if (!((cmd->args[0] >> 7) & 0x01)) {
+			ret = -ETIMEDOUT;
+			goto err_mutex_unlock;
+		}
+	}
+
+	mutex_unlock(&dev->i2c_mutex);
+	return 0;
+
+err_mutex_unlock:
+	mutex_unlock(&dev->i2c_mutex);
+	dev_dbg(&client->dev, "failed=%d\n", ret);
+	return ret;
+}
+
+static int si2168_read_status(struct dvb_frontend *fe, fe_status_t *status)
+{
+	struct i2c_client *client = fe->demodulator_priv;
+	struct si2168_dev *dev = i2c_get_clientdata(client);
+	struct dtv_frontend_properties *c = &fe->dtv_property_cache;
+	int ret;
+	struct si2168_cmd cmd;
+
+	*status = 0;
+
+	if (!dev->active) {
+		ret = -EAGAIN;
+		goto err;
+	}
+
+	switch (c->delivery_system) {
+	case SYS_DVBT:
+		memcpy(cmd.args, "\xa0\x01", 2);
+		cmd.wlen = 2;
+		cmd.rlen = 13;
+		break;
+	case SYS_DVBC_ANNEX_A:
+		memcpy(cmd.args, "\x90\x01", 2);
+		cmd.wlen = 2;
+		cmd.rlen = 9;
+		break;
+	case SYS_DVBT2:
+		memcpy(cmd.args, "\x50\x01", 2);
+		cmd.wlen = 2;
+		cmd.rlen = 14;
+		break;
+	default:
+		ret = -EINVAL;
+		goto err;
+	}
+
+	ret = si2168_cmd_execute(client, &cmd);
+	if (ret)
+		goto err;
+
+	switch ((cmd.args[2] >> 1) & 0x03) {
+	case 0x01:
+		*status = FE_HAS_SIGNAL | FE_HAS_CARRIER;
+		break;
+	case 0x03:
+		*status = FE_HAS_SIGNAL | FE_HAS_CARRIER | FE_HAS_VITERBI |
+				FE_HAS_SYNC | FE_HAS_LOCK;
+		break;
+	}
+
+	dev->fe_status = *status;
+
+	if (*status & FE_HAS_LOCK) {
+		c->cnr.len = 1;
+		c->cnr.stat[0].scale = FE_SCALE_DECIBEL;
+		c->cnr.stat[0].svalue = cmd.args[3] * 1000 / 4;
+	} else {
+		c->cnr.len = 1;
+		c->cnr.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
+	}
+
+	dev_dbg(&client->dev, "status=%02x args=%*ph\n",
+			*status, cmd.rlen, cmd.args);
+
+	return 0;
+err:
+	dev_dbg(&client->dev, "failed=%d\n", ret);
+	return ret;
+}
+
+static int si2168_set_frontend(struct dvb_frontend *fe)
+{
+	struct i2c_client *client = fe->demodulator_priv;
+	struct si2168_dev *dev = i2c_get_clientdata(client);
+	struct dtv_frontend_properties *c = &fe->dtv_property_cache;
+	int ret;
+	struct si2168_cmd cmd;
+	u8 bandwidth, delivery_system;
+
+	dev_dbg(&client->dev,
+			"delivery_system=%u modulation=%u frequency=%u bandwidth_hz=%u symbol_rate=%u inversion=%u stream_id=%u\n",
+			c->delivery_system, c->modulation, c->frequency,
+			c->bandwidth_hz, c->symbol_rate, c->inversion,
+			c->stream_id);
+
+	if (!dev->active) {
+		ret = -EAGAIN;
+		goto err;
+	}
+
+	switch (c->delivery_system) {
+	case SYS_DVBT:
+		delivery_system = 0x20;
+		break;
+	case SYS_DVBC_ANNEX_A:
+		delivery_system = 0x30;
+		break;
+	case SYS_DVBT2:
+		delivery_system = 0x70;
+		break;
+	default:
+		ret = -EINVAL;
+		goto err;
+	}
+
+	if (c->bandwidth_hz == 0) {
+		ret = -EINVAL;
+		goto err;
+	} else if (c->bandwidth_hz <= 2000000)
+		bandwidth = 0x02;
+	else if (c->bandwidth_hz <= 5000000)
+		bandwidth = 0x05;
+	else if (c->bandwidth_hz <= 6000000)
+		bandwidth = 0x06;
+	else if (c->bandwidth_hz <= 7000000)
+		bandwidth = 0x07;
+	else if (c->bandwidth_hz <= 8000000)
+		bandwidth = 0x08;
+	else if (c->bandwidth_hz <= 9000000)
+		bandwidth = 0x09;
+	else if (c->bandwidth_hz <= 10000000)
+		bandwidth = 0x0a;
+	else
+		bandwidth = 0x0f;
+
+	/* program tuner */
+	if (fe->ops.tuner_ops.set_params) {
+		ret = fe->ops.tuner_ops.set_params(fe);
+		if (ret)
+			goto err;
+	}
+
+	memcpy(cmd.args, "\x88\x02\x02\x02\x02", 5);
+	cmd.wlen = 5;
+	cmd.rlen = 5;
+	ret = si2168_cmd_execute(client, &cmd);
+	if (ret)
+		goto err;
+
+	/* that has no big effect */
+	if (c->delivery_system == SYS_DVBT)
+		memcpy(cmd.args, "\x89\x21\x06\x11\xff\x98", 6);
+	else if (c->delivery_system == SYS_DVBC_ANNEX_A)
+		memcpy(cmd.args, "\x89\x21\x06\x11\x89\xf0", 6);
+	else if (c->delivery_system == SYS_DVBT2)
+		memcpy(cmd.args, "\x89\x21\x06\x11\x89\x20", 6);
+	cmd.wlen = 6;
+	cmd.rlen = 3;
+	ret = si2168_cmd_execute(client, &cmd);
+	if (ret)
+		goto err;
+
+	if (c->delivery_system == SYS_DVBT2) {
+		/* select PLP */
+		cmd.args[0] = 0x52;
+		cmd.args[1] = c->stream_id & 0xff;
+		cmd.args[2] = c->stream_id == NO_STREAM_ID_FILTER ? 0 : 1;
+		cmd.wlen = 3;
+		cmd.rlen = 1;
+		ret = si2168_cmd_execute(client, &cmd);
+		if (ret)
+			goto err;
+	}
+
+	memcpy(cmd.args, "\x51\x03", 2);
+	cmd.wlen = 2;
+	cmd.rlen = 12;
+	ret = si2168_cmd_execute(client, &cmd);
+	if (ret)
+		goto err;
+
+	memcpy(cmd.args, "\x12\x08\x04", 3);
+	cmd.wlen = 3;
+	cmd.rlen = 3;
+	ret = si2168_cmd_execute(client, &cmd);
+	if (ret)
+		goto err;
+
+	memcpy(cmd.args, "\x14\x00\x0c\x10\x12\x00", 6);
+	cmd.wlen = 6;
+	cmd.rlen = 4;
+	ret = si2168_cmd_execute(client, &cmd);
+	if (ret)
+		goto err;
+
+	memcpy(cmd.args, "\x14\x00\x06\x10\x24\x00", 6);
+	cmd.wlen = 6;
+	cmd.rlen = 4;
+	ret = si2168_cmd_execute(client, &cmd);
+	if (ret)
+		goto err;
+
+	memcpy(cmd.args, "\x14\x00\x07\x10\x00\x24", 6);
+	cmd.wlen = 6;
+	cmd.rlen = 4;
+	ret = si2168_cmd_execute(client, &cmd);
+	if (ret)
+		goto err;
+
+	memcpy(cmd.args, "\x14\x00\x0a\x10\x00\x00", 6);
+	cmd.args[4] = delivery_system | bandwidth;
+	cmd.wlen = 6;
+	cmd.rlen = 4;
+	ret = si2168_cmd_execute(client, &cmd);
+	if (ret)
+		goto err;
+
+	/* set DVB-C symbol rate */
+	if (c->delivery_system == SYS_DVBC_ANNEX_A) {
+		memcpy(cmd.args, "\x14\x00\x02\x11", 4);
+		cmd.args[4] = ((c->symbol_rate / 1000) >> 0) & 0xff;
+		cmd.args[5] = ((c->symbol_rate / 1000) >> 8) & 0xff;
+		cmd.wlen = 6;
+		cmd.rlen = 4;
+		ret = si2168_cmd_execute(client, &cmd);
+		if (ret)
+			goto err;
+	}
+
+	memcpy(cmd.args, "\x14\x00\x0f\x10\x10\x00", 6);
+	cmd.wlen = 6;
+	cmd.rlen = 4;
+	ret = si2168_cmd_execute(client, &cmd);
+	if (ret)
+		goto err;
+
+	memcpy(cmd.args, "\x14\x00\x09\x10\xe3\x08", 6);
+	cmd.args[5] |= dev->ts_clock_inv ? 0x00 : 0x10;
+	cmd.wlen = 6;
+	cmd.rlen = 4;
+	ret = si2168_cmd_execute(client, &cmd);
+	if (ret)
+		goto err;
+
+	memcpy(cmd.args, "\x14\x00\x08\x10\xd7\x05", 6);
+	cmd.args[5] |= dev->ts_clock_inv ? 0x00 : 0x10;
+	cmd.wlen = 6;
+	cmd.rlen = 4;
+	ret = si2168_cmd_execute(client, &cmd);
+	if (ret)
+		goto err;
+
+	memcpy(cmd.args, "\x14\x00\x01\x12\x00\x00", 6);
+	cmd.wlen = 6;
+	cmd.rlen = 4;
+	ret = si2168_cmd_execute(client, &cmd);
+	if (ret)
+		goto err;
+
+	memcpy(cmd.args, "\x14\x00\x01\x03\x0c\x00", 6);
+	cmd.wlen = 6;
+	cmd.rlen = 4;
+	ret = si2168_cmd_execute(client, &cmd);
+	if (ret)
+		goto err;
+
+	memcpy(cmd.args, "\x85", 1);
+	cmd.wlen = 1;
+	cmd.rlen = 1;
+	ret = si2168_cmd_execute(client, &cmd);
+	if (ret)
+		goto err;
+
+	dev->delivery_system = c->delivery_system;
+
+	return 0;
+err:
+	dev_dbg(&client->dev, "failed=%d\n", ret);
+	return ret;
+}
+
+static int si2168_init(struct dvb_frontend *fe)
+{
+	struct i2c_client *client = fe->demodulator_priv;
+	struct si2168_dev *dev = i2c_get_clientdata(client);
+	int ret, len, remaining;
+	const struct firmware *fw;
+	struct si2168_cmd cmd;
+
+	dev_dbg(&client->dev, "\n");
+
+	/* initialize */
+	memcpy(cmd.args, "\xc0\x12\x00\x0c\x00\x0d\x16\x00\x00\x00\x00\x00\x00", 13);
+	cmd.wlen = 13;
+	cmd.rlen = 0;
+	ret = si2168_cmd_execute(client, &cmd);
+	if (ret)
+		goto err;
+
+	if (dev->warm) {
+		/* resume */
+		memcpy(cmd.args, "\xc0\x06\x08\x0f\x00\x20\x21\x01", 8);
+		cmd.wlen = 8;
+		cmd.rlen = 1;
+		ret = si2168_cmd_execute(client, &cmd);
+		if (ret)
+			goto err;
+
+		memcpy(cmd.args, "\x85", 1);
+		cmd.wlen = 1;
+		cmd.rlen = 1;
+		ret = si2168_cmd_execute(client, &cmd);
+		if (ret)
+			goto err;
+
+		goto warm;
+	}
+
+	/* power up */
+	memcpy(cmd.args, "\xc0\x06\x01\x0f\x00\x20\x20\x01", 8);
+	cmd.wlen = 8;
+	cmd.rlen = 1;
+	ret = si2168_cmd_execute(client, &cmd);
+	if (ret)
+		goto err;
+
+	/* request the firmware, this will block and timeout */
+	ret = request_firmware(&fw, dev->firmware_name, &client->dev);
+	if (ret) {
+		/* fallback mechanism to handle old name for Si2168 B40 fw */
+		if (dev->chip_id == SI2168_CHIP_ID_B40) {
+			dev->firmware_name = SI2168_B40_FIRMWARE_FALLBACK;
+			ret = request_firmware(&fw, dev->firmware_name,
+					       &client->dev);
+		}
+
+		if (ret == 0) {
+			dev_notice(&client->dev,
+					"please install firmware file '%s'\n",
+					SI2168_B40_FIRMWARE);
+		} else {
+			dev_err(&client->dev,
+					"firmware file '%s' not found\n",
+					dev->firmware_name);
+			goto err_release_firmware;
+		}
+	}
+
+	dev_info(&client->dev, "downloading firmware from file '%s'\n",
+			dev->firmware_name);
+
+	if ((fw->size % 17 == 0) && (fw->data[0] > 5)) {
+		/* firmware is in the new format */
+		for (remaining = fw->size; remaining > 0; remaining -= 17) {
+			len = fw->data[fw->size - remaining];
+			if (len > SI2168_ARGLEN) {
+				ret = -EINVAL;
+				break;
+			}
+			memcpy(cmd.args, &fw->data[(fw->size - remaining) + 1], len);
+			cmd.wlen = len;
+			cmd.rlen = 1;
+			ret = si2168_cmd_execute(client, &cmd);
+			if (ret)
+				break;
+		}
+	} else if (fw->size % 8 == 0) {
+		/* firmware is in the old format */
+		for (remaining = fw->size; remaining > 0; remaining -= 8) {
+			len = 8;
+			memcpy(cmd.args, &fw->data[fw->size - remaining], len);
+			cmd.wlen = len;
+			cmd.rlen = 1;
+			ret = si2168_cmd_execute(client, &cmd);
+			if (ret)
+				break;
+		}
+	} else {
+		/* bad or unknown firmware format */
+		ret = -EINVAL;
+	}
+
+	if (ret) {
+		dev_err(&client->dev, "firmware download failed %d\n", ret);
+		goto err_release_firmware;
+	}
+
+	release_firmware(fw);
+
+	memcpy(cmd.args, "\x01\x01", 2);
+	cmd.wlen = 2;
+	cmd.rlen = 1;
+	ret = si2168_cmd_execute(client, &cmd);
+	if (ret)
+		goto err;
+
+	/* query firmware version */
+	memcpy(cmd.args, "\x11", 1);
+	cmd.wlen = 1;
+	cmd.rlen = 10;
+	ret = si2168_cmd_execute(client, &cmd);
+	if (ret)
+		goto err;
+
+	dev->version = (cmd.args[9] + '@') << 24 | (cmd.args[6] - '0') << 16 |
+		       (cmd.args[7] - '0') << 8 | (cmd.args[8]) << 0;
+	dev_info(&client->dev, "firmware version: %c %d.%d.%d\n",
+		 dev->version >> 24 & 0xff, dev->version >> 16 & 0xff,
+		 dev->version >> 8 & 0xff, dev->version >> 0 & 0xff);
+
+	/* set ts mode */
+	memcpy(cmd.args, "\x14\x00\x01\x10\x10\x00", 6);
+	cmd.args[4] |= dev->ts_mode;
+	cmd.wlen = 6;
+	cmd.rlen = 4;
+	ret = si2168_cmd_execute(client, &cmd);
+	if (ret)
+		goto err;
+
+	dev->warm = true;
+warm:
+	dev->active = true;
+
+	return 0;
+
+err_release_firmware:
+	release_firmware(fw);
+err:
+	dev_dbg(&client->dev, "failed=%d\n", ret);
+	return ret;
+}
+
+static int si2168_sleep(struct dvb_frontend *fe)
+{
+	struct i2c_client *client = fe->demodulator_priv;
+	struct si2168_dev *dev = i2c_get_clientdata(client);
+	int ret;
+	struct si2168_cmd cmd;
+
+	dev_dbg(&client->dev, "\n");
+
+	dev->active = false;
+
+	/* Firmware B 4.0-11 or later loses warm state during sleep */
+	if (dev->version > ('B' << 24 | 4 << 16 | 0 << 8 | 11 << 0))
+		dev->warm = false;
+
+	memcpy(cmd.args, "\x13", 1);
+	cmd.wlen = 1;
+	cmd.rlen = 0;
+	ret = si2168_cmd_execute(client, &cmd);
+	if (ret)
+		goto err;
+
+	return 0;
+err:
+	dev_dbg(&client->dev, "failed=%d\n", ret);
+	return ret;
+}
+
+static int si2168_get_tune_settings(struct dvb_frontend *fe,
+	struct dvb_frontend_tune_settings *s)
+{
+	s->min_delay_ms = 900;
+
+	return 0;
+}
+
+/*
+ * I2C gate logic
+ * We must use unlocked i2c_transfer() here because I2C lock is already taken
+ * by tuner driver.
+ */
+static int si2168_select(struct i2c_adapter *adap, void *mux_priv, u32 chan)
+{
+	struct i2c_client *client = mux_priv;
+	struct si2168_dev *dev = i2c_get_clientdata(client);
+	int ret;
+	struct i2c_msg gate_open_msg = {
+		.addr = client->addr,
+		.flags = 0,
+		.len = 3,
+		.buf = "\xc0\x0d\x01",
+	};
+
+	mutex_lock(&dev->i2c_mutex);
+
+	/* open tuner I2C gate */
+	ret = __i2c_transfer(client->adapter, &gate_open_msg, 1);
+	if (ret != 1) {
+		dev_warn(&client->dev, "i2c write failed=%d\n", ret);
+		if (ret >= 0)
+			ret = -EREMOTEIO;
+	} else {
+		ret = 0;
+	}
+
+	return ret;
+}
+
+static int si2168_deselect(struct i2c_adapter *adap, void *mux_priv, u32 chan)
+{
+	struct i2c_client *client = mux_priv;
+	struct si2168_dev *dev = i2c_get_clientdata(client);
+	int ret;
+	struct i2c_msg gate_close_msg = {
+		.addr = client->addr,
+		.flags = 0,
+		.len = 3,
+		.buf = "\xc0\x0d\x00",
+	};
+
+	/* close tuner I2C gate */
+	ret = __i2c_transfer(client->adapter, &gate_close_msg, 1);
+	if (ret != 1) {
+		dev_warn(&client->dev, "i2c write failed=%d\n", ret);
+		if (ret >= 0)
+			ret = -EREMOTEIO;
+	} else {
+		ret = 0;
+	}
+
+	mutex_unlock(&dev->i2c_mutex);
+
+	return ret;
+}
+
+static const struct dvb_frontend_ops si2168_ops = {
+	.delsys = {SYS_DVBT, SYS_DVBT2, SYS_DVBC_ANNEX_A},
+	.info = {
+		.name = "Silicon Labs Si2168",
+		.symbol_rate_min = 1000000,
+		.symbol_rate_max = 7200000,
+		.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
+	},
+
+	.get_tune_settings = si2168_get_tune_settings,
+
+	.init = si2168_init,
+	.sleep = si2168_sleep,
+
+	.set_frontend = si2168_set_frontend,
+
+	.read_status = si2168_read_status,
+};
+
+static int si2168_probe(struct i2c_client *client,
+		const struct i2c_device_id *id)
+{
+	struct si2168_config *config = client->dev.platform_data;
+	struct si2168_dev *dev;
+	int ret;
+	struct si2168_cmd cmd;
+
+	dev_dbg(&client->dev, "\n");
+
+	dev = kzalloc(sizeof(*dev), GFP_KERNEL);
+	if (!dev) {
+		ret = -ENOMEM;
+		dev_err(&client->dev, "kzalloc() failed\n");
+		goto err;
+	}
+
+	i2c_set_clientdata(client, dev);
+	mutex_init(&dev->i2c_mutex);
+
+	/* Initialize */
+	memcpy(cmd.args, "\xc0\x12\x00\x0c\x00\x0d\x16\x00\x00\x00\x00\x00\x00", 13);
+	cmd.wlen = 13;
+	cmd.rlen = 0;
+	ret = si2168_cmd_execute(client, &cmd);
+	if (ret)
+		goto err_kfree;
+
+	/* Power up */
+	memcpy(cmd.args, "\xc0\x06\x01\x0f\x00\x20\x20\x01", 8);
+	cmd.wlen = 8;
+	cmd.rlen = 1;
+	ret = si2168_cmd_execute(client, &cmd);
+	if (ret)
+		goto err_kfree;
+
+	/* Query chip revision */
+	memcpy(cmd.args, "\x02", 1);
+	cmd.wlen = 1;
+	cmd.rlen = 13;
+	ret = si2168_cmd_execute(client, &cmd);
+	if (ret)
+		goto err_kfree;
+
+	dev->chip_id = cmd.args[1] << 24 | cmd.args[2] << 16 |
+		       cmd.args[3] << 8 | cmd.args[4] << 0;
+
+	switch (dev->chip_id) {
+	case SI2168_CHIP_ID_A20:
+		dev->firmware_name = SI2168_A20_FIRMWARE;
+		break;
+	case SI2168_CHIP_ID_A30:
+		dev->firmware_name = SI2168_A30_FIRMWARE;
+		break;
+	case SI2168_CHIP_ID_B40:
+		dev->firmware_name = SI2168_B40_FIRMWARE;
+		break;
+	case SI2168_CHIP_ID_D60:
+		dev->firmware_name = SI2168_D60_FIRMWARE;
+		break;
+	default:
+		dev_dbg(&client->dev, "unknown chip version Si21%d-%c%c%c\n",
+			cmd.args[2], cmd.args[1], cmd.args[3], cmd.args[4]);
+		ret = -ENODEV;
+		goto err_kfree;
+	}
+
+	dev->version = (cmd.args[1]) << 24 | (cmd.args[3] - '0') << 16 |
+		       (cmd.args[4] - '0') << 8 | (cmd.args[5]) << 0;
+
+	/* create mux i2c adapter for tuner */
+	dev->adapter = i2c_add_mux_adapter(client->adapter, &client->dev,
+			client, 0, 0, 0, si2168_select, si2168_deselect);
+	if (dev->adapter == NULL) {
+		ret = -ENODEV;
+		goto err_kfree;
+	}
+
+	/* create dvb_frontend */
+	memcpy(&dev->fe.ops, &si2168_ops, sizeof(struct dvb_frontend_ops));
+	dev->fe.demodulator_priv = client;
+	*config->i2c_adapter = dev->adapter;
+	*config->fe = &dev->fe;
+	dev->ts_mode = config->ts_mode;
+	dev->ts_clock_inv = config->ts_clock_inv;
+
+	dev_info(&client->dev, "Silicon Labs Si2168-%c%d%d successfully identified\n",
+		 dev->version >> 24 & 0xff, dev->version >> 16 & 0xff,
+		 dev->version >> 8 & 0xff);
+	dev_info(&client->dev, "firmware version: %c %d.%d.%d\n",
+		 dev->version >> 24 & 0xff, dev->version >> 16 & 0xff,
+		 dev->version >> 8 & 0xff, dev->version >> 0 & 0xff);
+
+	return 0;
+err_kfree:
+	kfree(dev);
+err:
+	dev_dbg(&client->dev, "failed=%d\n", ret);
+	return ret;
+}
+
+static int si2168_remove(struct i2c_client *client)
+{
+	struct si2168_dev *dev = i2c_get_clientdata(client);
+
+	dev_dbg(&client->dev, "\n");
+
+	i2c_del_mux_adapter(dev->adapter);
+
+	dev->fe.ops.release = NULL;
+	dev->fe.demodulator_priv = NULL;
+
+	kfree(dev);
+
+	return 0;
+}
+
+static const struct i2c_device_id si2168_id_table[] = {
+	{"si2168", 0},
+	{}
+};
+MODULE_DEVICE_TABLE(i2c, si2168_id_table);
+
+static struct i2c_driver si2168_driver = {
+	.driver = {
+		.owner	= THIS_MODULE,
+		.name	= "si2168",
+	},
+	.probe		= si2168_probe,
+	.remove		= si2168_remove,
+	.id_table	= si2168_id_table,
+};
+
+module_i2c_driver(si2168_driver);
+
+MODULE_AUTHOR("Antti Palosaari <crope@iki.fi>");
+MODULE_DESCRIPTION("Silicon Labs Si2168 DVB-T/T2/C demodulator driver");
+MODULE_LICENSE("GPL");
+MODULE_FIRMWARE(SI2168_A20_FIRMWARE);
+MODULE_FIRMWARE(SI2168_A30_FIRMWARE);
+MODULE_FIRMWARE(SI2168_B40_FIRMWARE);
+MODULE_FIRMWARE(SI2168_D60_FIRMWARE);
diff --git a/drivers/media/dvb-frontends/si2168.h b/drivers/media/dvb-frontends/si2168.h
new file mode 100644
index 0000000..5a801aa
--- /dev/null
+++ b/drivers/media/dvb-frontends/si2168.h
@@ -0,0 +1,47 @@
+/*
+ * Silicon Labs Si2168 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.
+ */
+
+#ifndef SI2168_H
+#define SI2168_H
+
+#include <linux/dvb/frontend.h>
+/*
+ * I2C address
+ * 0x64
+ */
+struct si2168_config {
+	/*
+	 * frontend
+	 * returned by driver
+	 */
+	struct dvb_frontend **fe;
+
+	/*
+	 * tuner I2C adapter
+	 * returned by driver
+	 */
+	struct i2c_adapter **i2c_adapter;
+
+	/* TS mode */
+#define SI2168_TS_PARALLEL	0x06
+#define SI2168_TS_SERIAL	0x03
+	u8 ts_mode;
+
+	/* TS clock inverted */
+	bool ts_clock_inv;
+};
+
+#endif
diff --git a/drivers/media/dvb-frontends/si2168_priv.h b/drivers/media/dvb-frontends/si2168_priv.h
new file mode 100644
index 0000000..3646324
--- /dev/null
+++ b/drivers/media/dvb-frontends/si2168_priv.h
@@ -0,0 +1,59 @@
+/*
+ * Silicon Labs Si2168 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.
+ */
+
+#ifndef SI2168_PRIV_H
+#define SI2168_PRIV_H
+
+#include "si2168.h"
+#include "dvb_frontend.h"
+#include <linux/firmware.h>
+#include <linux/i2c-mux.h>
+
+#define SI2168_A20_FIRMWARE "dvb-demod-si2168-a20-01.fw"
+#define SI2168_A30_FIRMWARE "dvb-demod-si2168-a30-01.fw"
+#define SI2168_B40_FIRMWARE "dvb-demod-si2168-b40-01.fw"
+#define SI2168_D60_FIRMWARE "dvb-demod-si2168-d60-01.fw"
+#define SI2168_B40_FIRMWARE_FALLBACK "dvb-demod-si2168-02.fw"
+
+/* state struct */
+struct si2168_dev {
+	struct i2c_adapter *adapter;
+	struct mutex i2c_mutex;
+	struct dvb_frontend fe;
+	fe_delivery_system_t delivery_system;
+	fe_status_t fe_status;
+	#define SI2168_CHIP_ID_A20 ('A' << 24 | 68 << 16 | '2' << 8 | '0' << 0)
+	#define SI2168_CHIP_ID_A30 ('A' << 24 | 68 << 16 | '3' << 8 | '0' << 0)
+	#define SI2168_CHIP_ID_B40 ('B' << 24 | 68 << 16 | '4' << 8 | '0' << 0)
+	#define SI2168_CHIP_ID_D60 ('D' << 24 | 68 << 16 | '6' << 8 | '0' << 0)
+	unsigned int chip_id;
+	unsigned int version;
+	const char *firmware_name;
+	bool active;
+	bool warm;
+	u8 ts_mode;
+	bool ts_clock_inv;
+};
+
+/* firmware command struct */
+#define SI2168_ARGLEN      30
+struct si2168_cmd {
+	u8 args[SI2168_ARGLEN];
+	unsigned wlen;
+	unsigned rlen;
+};
+
+#endif