drivers/media/dvb/dvb-usb/ec168.c - LeafOS-Devices/android_kernel_samsung_gta4xl - Gitiles

 /*
  * E3C EC168 DVB USB driver
  *
  * Copyright (C) 2009 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., 675 Mass Ave, Cambridge, MA 02139, USA.
  *
  */

 #include "ec168.h"
 #include "ec100.h"
 #include "mxl5005s.h"

 /* debug */
 static int dvb_usb_ec168_debug;
 module_param_named(debug, dvb_usb_ec168_debug, int, 0644);
 MODULE_PARM_DESC(debug, "set debugging level" DVB_USB_DEBUG_STATUS);
 DVB_DEFINE_MOD_OPT_ADAPTER_NR(adapter_nr);

 static struct ec100_config ec168_ec100_config;

 static int ec168_rw_udev(struct usb_device *udev, struct ec168_req *req)
 {
 	int ret;
 	unsigned int pipe;
 	u8 request, requesttype;
 	u8 *buf;


 	switch (req->cmd) {
 	case DOWNLOAD_FIRMWARE:
 	case GPIO:
 	case WRITE_I2C:
 	case STREAMING_CTRL:
 		requesttype = (USB_TYPE_VENDOR | USB_DIR_OUT);
 		request = req->cmd;
 		break;
 	case READ_I2C:
 		requesttype = (USB_TYPE_VENDOR | USB_DIR_IN);
 		request = req->cmd;
 		break;
 	case GET_CONFIG:
 		requesttype = (USB_TYPE_VENDOR | USB_DIR_IN);
 		request = CONFIG;
 		break;
 	case SET_CONFIG:
 		requesttype = (USB_TYPE_VENDOR | USB_DIR_OUT);
 		request = CONFIG;
 		break;
 	case WRITE_DEMOD:
 		requesttype = (USB_TYPE_VENDOR | USB_DIR_OUT);
 		request = DEMOD_RW;
 		break;
 	case READ_DEMOD:
 		requesttype = (USB_TYPE_VENDOR | USB_DIR_IN);
 		request = DEMOD_RW;
 		break;
 	default:
 		err("unknown command:%02x", req->cmd);
 		ret = -EPERM;
 		goto error;
 	}

 	buf = kmalloc(req->size, GFP_KERNEL);
 	if (!buf) {
 		ret = -ENOMEM;
 		goto error;
 	}

 	if (requesttype == (USB_TYPE_VENDOR | USB_DIR_OUT)) {
 		/* write */
 		memcpy(buf, req->data, req->size);
 		pipe = usb_sndctrlpipe(udev, 0);
 	} else {
 		/* read */
 		pipe = usb_rcvctrlpipe(udev, 0);
 	}

 	msleep(1); /* avoid I2C errors */

 	ret = usb_control_msg(udev, pipe, request, requesttype, req->value,
 		req->index, buf, req->size, EC168_USB_TIMEOUT);

 	ec168_debug_dump(request, requesttype, req->value, req->index, buf,
 		req->size, deb_xfer);

 	if (ret < 0)
 		goto err_dealloc;
 	else
 		ret = 0;

 	/* read request, copy returned data to return buf */
 	if (!ret && requesttype == (USB_TYPE_VENDOR | USB_DIR_IN))
 		memcpy(req->data, buf, req->size);

 	kfree(buf);
 	return ret;

 err_dealloc:
 	kfree(buf);
 error:
 	deb_info("%s: failed:%d\n", __func__, ret);
 	return ret;
 }

 static int ec168_ctrl_msg(struct dvb_usb_device *d, struct ec168_req *req)
 {
 	return ec168_rw_udev(d->udev, req);
 }

 /* I2C */
 static int ec168_i2c_xfer(struct i2c_adapter *adap, struct i2c_msg msg[],
 	int num)
 {
 	struct dvb_usb_device *d = i2c_get_adapdata(adap);
 	struct ec168_req req;
 	int i = 0;
 	int ret;

 	if (num > 2)
 		return -EINVAL;

 	if (mutex_lock_interruptible(&d->i2c_mutex) < 0)
 		return -EAGAIN;

 	while (i < num) {
 		if (num > i + 1 && (msg[i+1].flags & I2C_M_RD)) {
 			if (msg[i].addr == ec168_ec100_config.demod_address) {
 				req.cmd = READ_DEMOD;
 				req.value = 0;
 				req.index = 0xff00 + msg[i].buf[0]; /* reg */
 				req.size = msg[i+1].len; /* bytes to read */
 				req.data = &msg[i+1].buf[0];
 				ret = ec168_ctrl_msg(d, &req);
 				i += 2;
 			} else {
 				err("I2C read not implemented");
 				ret = -ENOSYS;
 				i += 2;
 			}
 		} else {
 			if (msg[i].addr == ec168_ec100_config.demod_address) {
 				req.cmd = WRITE_DEMOD;
 				req.value = msg[i].buf[1]; /* val */
 				req.index = 0xff00 + msg[i].buf[0]; /* reg */
 				req.size = 0;
 				req.data = NULL;
 				ret = ec168_ctrl_msg(d, &req);
 				i += 1;
 			} else {
 				req.cmd = WRITE_I2C;
 				req.value = msg[i].buf[0]; /* val */
 				req.index = 0x0100 + msg[i].addr; /* I2C addr */
 				req.size = msg[i].len-1;
 				req.data = &msg[i].buf[1];
 				ret = ec168_ctrl_msg(d, &req);
 				i += 1;
 			}
 		}
 		if (ret)
 			goto error;

 	}
 	ret = i;

 error:
 	mutex_unlock(&d->i2c_mutex);
 	return i;
 }


 static u32 ec168_i2c_func(struct i2c_adapter *adapter)
 {
 	return I2C_FUNC_I2C;
 }

 static struct i2c_algorithm ec168_i2c_algo = {
 	.master_xfer   = ec168_i2c_xfer,
 	.functionality = ec168_i2c_func,
 };

 /* Callbacks for DVB USB */
 static struct ec100_config ec168_ec100_config = {
 	.demod_address = 0xff, /* not real address, demod is integrated */
 };

 static int ec168_ec100_frontend_attach(struct dvb_usb_adapter *adap)
 {
 	deb_info("%s:\n", __func__);
 	adap->fe_adap[0].fe = dvb_attach(ec100_attach, &ec168_ec100_config,
 		&adap->dev->i2c_adap);
 	if (adap->fe_adap[0].fe == NULL)
 		return -ENODEV;

 	return 0;
 }

 static struct mxl5005s_config ec168_mxl5003s_config = {
 	.i2c_address     = 0xc6,
 	.if_freq         = IF_FREQ_4570000HZ,
 	.xtal_freq       = CRYSTAL_FREQ_16000000HZ,
 	.agc_mode        = MXL_SINGLE_AGC,
 	.tracking_filter = MXL_TF_OFF,
 	.rssi_enable     = MXL_RSSI_ENABLE,
 	.cap_select      = MXL_CAP_SEL_ENABLE,
 	.div_out         = MXL_DIV_OUT_4,
 	.clock_out       = MXL_CLOCK_OUT_DISABLE,
 	.output_load     = MXL5005S_IF_OUTPUT_LOAD_200_OHM,
 	.top		 = MXL5005S_TOP_25P2,
 	.mod_mode        = MXL_DIGITAL_MODE,
 	.if_mode         = MXL_ZERO_IF,
 	.AgcMasterByte   = 0x00,
 };

 static int ec168_mxl5003s_tuner_attach(struct dvb_usb_adapter *adap)
 {
 	deb_info("%s:\n", __func__);
 	return dvb_attach(mxl5005s_attach, adap->fe_adap[0].fe, &adap->dev->i2c_adap,
 		&ec168_mxl5003s_config) == NULL ? -ENODEV : 0;
 }

 static int ec168_streaming_ctrl(struct dvb_usb_adapter *adap, int onoff)
 {
 	struct ec168_req req = {STREAMING_CTRL, 0x7f01, 0x0202, 0, NULL};
 	deb_info("%s: onoff:%d\n", __func__, onoff);
 	if (onoff)
 		req.index = 0x0102;
 	return ec168_ctrl_msg(adap->dev, &req);
 }

 static int ec168_download_firmware(struct usb_device *udev,
 	const struct firmware *fw)
 {
 	int i, len, packets, remainder, ret;
 	u16 addr = 0x0000; /* firmware start address */
 	struct ec168_req req = {DOWNLOAD_FIRMWARE, 0, 0, 0, NULL};
 	deb_info("%s:\n", __func__);

 	#define FW_PACKET_MAX_DATA  2048
 	packets = fw->size / FW_PACKET_MAX_DATA;
 	remainder = fw->size % FW_PACKET_MAX_DATA;
 	len = FW_PACKET_MAX_DATA;
 	for (i = 0; i <= packets; i++) {
 		if (i == packets)  /* set size of the last packet */
 			len = remainder;

 		req.size = len;
 		req.data = (u8 *)(fw->data + i * FW_PACKET_MAX_DATA);
 		req.index = addr;
 		addr += FW_PACKET_MAX_DATA;

 		ret = ec168_rw_udev(udev, &req);
 		if (ret) {
 			err("firmware download failed:%d packet:%d", ret, i);
 			goto error;
 		}
 	}
 	req.size = 0;

 	/* set "warm"? */
 	req.cmd = SET_CONFIG;
 	req.value = 0;
 	req.index = 0x0001;
 	ret = ec168_rw_udev(udev, &req);
 	if (ret)
 		goto error;

 	/* really needed - no idea what does */
 	req.cmd = GPIO;
 	req.value = 0;
 	req.index = 0x0206;
 	ret = ec168_rw_udev(udev, &req);
 	if (ret)
 		goto error;

 	/* activate tuner I2C? */
 	req.cmd = WRITE_I2C;
 	req.value = 0;
 	req.index = 0x00c6;
 	ret = ec168_rw_udev(udev, &req);
 	if (ret)
 		goto error;

 	return ret;
 error:
 	deb_info("%s: failed:%d\n", __func__, ret);
 	return ret;
 }

 static int ec168_identify_state(struct usb_device *udev,
 	struct dvb_usb_device_properties *props,
 	struct dvb_usb_device_description **desc, int *cold)
 {
 	int ret;
 	u8 reply;
 	struct ec168_req req = {GET_CONFIG, 0, 1, sizeof(reply), &reply};
 	deb_info("%s:\n", __func__);

 	ret = ec168_rw_udev(udev, &req);
 	if (ret)
 		goto error;

 	deb_info("%s: reply:%02x\n", __func__, reply);

 	if (reply == 0x01)
 		*cold = 0;
 	else
 		*cold = 1;

 	return ret;
 error:
 	deb_info("%s: failed:%d\n", __func__, ret);
 	return ret;
 }

 /* DVB USB Driver stuff */
 static struct dvb_usb_device_properties ec168_properties;

 static int ec168_probe(struct usb_interface *intf,
 	const struct usb_device_id *id)
 {
 	int ret;
 	deb_info("%s: interface:%d\n", __func__,
 		intf->cur_altsetting->desc.bInterfaceNumber);

 	ret = dvb_usb_device_init(intf, &ec168_properties, THIS_MODULE, NULL,
 		adapter_nr);
 	if (ret)
 		goto error;

 	return ret;
 error:
 	deb_info("%s: failed:%d\n", __func__, ret);
 	return ret;
 }

 #define E3C_EC168_1689                          0
 #define E3C_EC168_FFFA                          1
 #define E3C_EC168_FFFB                          2
 #define E3C_EC168_1001                          3
 #define E3C_EC168_1002                          4

 static struct usb_device_id ec168_id[] = {
 	[E3C_EC168_1689] =
 		{USB_DEVICE(USB_VID_E3C, USB_PID_E3C_EC168)},
 	[E3C_EC168_FFFA] =
 		{USB_DEVICE(USB_VID_E3C, USB_PID_E3C_EC168_2)},
 	[E3C_EC168_FFFB] =
 		{USB_DEVICE(USB_VID_E3C, USB_PID_E3C_EC168_3)},
 	[E3C_EC168_1001] =
 		{USB_DEVICE(USB_VID_E3C, USB_PID_E3C_EC168_4)},
 	[E3C_EC168_1002] =
 		{USB_DEVICE(USB_VID_E3C, USB_PID_E3C_EC168_5)},
 	{} /* terminating entry */
 };

 MODULE_DEVICE_TABLE(usb, ec168_id);

 static struct dvb_usb_device_properties ec168_properties = {
 	.caps = DVB_USB_IS_AN_I2C_ADAPTER,

 	.usb_ctrl = DEVICE_SPECIFIC,
 	.download_firmware = ec168_download_firmware,
 	.firmware = "dvb-usb-ec168.fw",
 	.no_reconnect = 1,

 	.size_of_priv = 0,

 	.num_adapters = 1,
 	.adapter = {
 		{
 		.num_frontends = 1,
 		.fe = {{
 			.streaming_ctrl   = ec168_streaming_ctrl,
 			.frontend_attach  = ec168_ec100_frontend_attach,
 			.tuner_attach     = ec168_mxl5003s_tuner_attach,
 			.stream = {
 				.type = USB_BULK,
 				.count = 6,
 				.endpoint = 0x82,
 				.u = {
 					.bulk = {
 						.buffersize = (32*512),
 					}
 				}
 			},
 		}},
 		}
 	},

 	.identify_state = ec168_identify_state,

 	.i2c_algo = &ec168_i2c_algo,

 	.num_device_descs = 1,
 	.devices = {
 		{
 			.name = "E3C EC168 DVB-T USB2.0 reference design",
 			.cold_ids = {
 				&ec168_id[E3C_EC168_1689],
 				&ec168_id[E3C_EC168_FFFA],
 				&ec168_id[E3C_EC168_FFFB],
 				&ec168_id[E3C_EC168_1001],
 				&ec168_id[E3C_EC168_1002],
 				NULL},
 			.warm_ids = {NULL},
 		},
 	}
 };

 static struct usb_driver ec168_driver = {
 	.name       = "dvb_usb_ec168",
 	.probe      = ec168_probe,
 	.disconnect = dvb_usb_device_exit,
 	.id_table   = ec168_id,
 };

 /* module stuff */
 static int __init ec168_module_init(void)
 {
 	int ret;
 	deb_info("%s:\n", __func__);
 	ret = usb_register(&ec168_driver);
 	if (ret)
 		err("module init failed:%d", ret);

 	return ret;
 }

 static void __exit ec168_module_exit(void)
 {
 	deb_info("%s:\n", __func__);
 	/* deregister this driver from the USB subsystem */
 	usb_deregister(&ec168_driver);
 }

 module_init(ec168_module_init);
 module_exit(ec168_module_exit);

 MODULE_AUTHOR("Antti Palosaari <crope@iki.fi>");
 MODULE_DESCRIPTION("E3C EC168 DVB-T USB2.0 driver");
 MODULE_LICENSE("GPL");
	/*
	* E3C EC168 DVB USB driver
	*
	* Copyright (C) 2009 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., 675 Mass Ave, Cambridge, MA 02139, USA.
	*
	*/

	#include "ec168.h"
	#include "ec100.h"
	#include "mxl5005s.h"

	/* debug */
	static int dvb_usb_ec168_debug;
	module_param_named(debug, dvb_usb_ec168_debug, int, 0644);
	MODULE_PARM_DESC(debug, "set debugging level" DVB_USB_DEBUG_STATUS);
	DVB_DEFINE_MOD_OPT_ADAPTER_NR(adapter_nr);

	static struct ec100_config ec168_ec100_config;

	static int ec168_rw_udev(struct usb_device udev, struct ec168_req req)
	{
	int ret;
	unsigned int pipe;
	u8 request, requesttype;
	u8 *buf;



	switch (req->cmd) {
	case DOWNLOAD_FIRMWARE:
	case GPIO:
	case WRITE_I2C:
	case STREAMING_CTRL:
	requesttype = (USB_TYPE_VENDOR \| USB_DIR_OUT);
	request = req->cmd;
	break;
	case READ_I2C:
	requesttype = (USB_TYPE_VENDOR \| USB_DIR_IN);
	request = req->cmd;
	break;
	case GET_CONFIG:
	requesttype = (USB_TYPE_VENDOR \| USB_DIR_IN);
	request = CONFIG;
	break;
	case SET_CONFIG:
	requesttype = (USB_TYPE_VENDOR \| USB_DIR_OUT);
	request = CONFIG;
	break;
	case WRITE_DEMOD:
	requesttype = (USB_TYPE_VENDOR \| USB_DIR_OUT);
	request = DEMOD_RW;
	break;
	case READ_DEMOD:
	requesttype = (USB_TYPE_VENDOR \| USB_DIR_IN);
	request = DEMOD_RW;
	break;
	default:
	err("unknown command:%02x", req->cmd);
	ret = -EPERM;
	goto error;
	}

	buf = kmalloc(req->size, GFP_KERNEL);
	if (!buf) {
	ret = -ENOMEM;
	goto error;
	}

	if (requesttype == (USB_TYPE_VENDOR \| USB_DIR_OUT)) {
	/* write */
	memcpy(buf, req->data, req->size);
	pipe = usb_sndctrlpipe(udev, 0);
	} else {
	/* read */
	pipe = usb_rcvctrlpipe(udev, 0);
	}

	msleep(1); /* avoid I2C errors */

	ret = usb_control_msg(udev, pipe, request, requesttype, req->value,
	req->index, buf, req->size, EC168_USB_TIMEOUT);

	ec168_debug_dump(request, requesttype, req->value, req->index, buf,
	req->size, deb_xfer);

	if (ret < 0)
	goto err_dealloc;
	else
	ret = 0;

	/* read request, copy returned data to return buf */
	if (!ret && requesttype == (USB_TYPE_VENDOR \| USB_DIR_IN))
	memcpy(req->data, buf, req->size);

	kfree(buf);
	return ret;

	err_dealloc:
	kfree(buf);
	error:
	deb_info("%s: failed:%d\n", __func__, ret);
	return ret;
	}

	static int ec168_ctrl_msg(struct dvb_usb_device d, struct ec168_req req)
	{
	return ec168_rw_udev(d->udev, req);
	}

	/* I2C */
	static int ec168_i2c_xfer(struct i2c_adapter *adap, struct i2c_msg msg[],
	int num)
	{
	struct dvb_usb_device *d = i2c_get_adapdata(adap);
	struct ec168_req req;
	int i = 0;
	int ret;

	if (num > 2)
	return -EINVAL;

	if (mutex_lock_interruptible(&d->i2c_mutex) < 0)
	return -EAGAIN;

	while (i < num) {
	if (num > i + 1 && (msg[i+1].flags & I2C_M_RD)) {
	if (msg[i].addr == ec168_ec100_config.demod_address) {
	req.cmd = READ_DEMOD;
	req.value = 0;
	req.index = 0xff00 + msg[i].buf[0]; /* reg */
	req.size = msg[i+1].len; /* bytes to read */
	req.data = &msg[i+1].buf[0];
	ret = ec168_ctrl_msg(d, &req);
	i += 2;
	} else {
	err("I2C read not implemented");
	ret = -ENOSYS;
	i += 2;
	}
	} else {
	if (msg[i].addr == ec168_ec100_config.demod_address) {
	req.cmd = WRITE_DEMOD;
	req.value = msg[i].buf[1]; /* val */
	req.index = 0xff00 + msg[i].buf[0]; /* reg */
	req.size = 0;
	req.data = NULL;
	ret = ec168_ctrl_msg(d, &req);
	i += 1;
	} else {
	req.cmd = WRITE_I2C;
	req.value = msg[i].buf[0]; /* val */
	req.index = 0x0100 + msg[i].addr; /* I2C addr */
	req.size = msg[i].len-1;
	req.data = &msg[i].buf[1];
	ret = ec168_ctrl_msg(d, &req);
	i += 1;
	}
	}
	if (ret)
	goto error;

	}
	ret = i;

	error:
	mutex_unlock(&d->i2c_mutex);
	return i;
	}


	static u32 ec168_i2c_func(struct i2c_adapter *adapter)
	{
	return I2C_FUNC_I2C;
	}

	static struct i2c_algorithm ec168_i2c_algo = {
	.master_xfer = ec168_i2c_xfer,
	.functionality = ec168_i2c_func,
	};

	/* Callbacks for DVB USB */
	static struct ec100_config ec168_ec100_config = {
	.demod_address = 0xff, /* not real address, demod is integrated */
	};

	static int ec168_ec100_frontend_attach(struct dvb_usb_adapter *adap)
	{
	deb_info("%s:\n", __func__);
	adap->fe_adap[0].fe = dvb_attach(ec100_attach, &ec168_ec100_config,
	&adap->dev->i2c_adap);
	if (adap->fe_adap[0].fe == NULL)
	return -ENODEV;

	return 0;
	}

	static struct mxl5005s_config ec168_mxl5003s_config = {
	.i2c_address = 0xc6,
	.if_freq = IF_FREQ_4570000HZ,
	.xtal_freq = CRYSTAL_FREQ_16000000HZ,
	.agc_mode = MXL_SINGLE_AGC,
	.tracking_filter = MXL_TF_OFF,
	.rssi_enable = MXL_RSSI_ENABLE,
	.cap_select = MXL_CAP_SEL_ENABLE,
	.div_out = MXL_DIV_OUT_4,
	.clock_out = MXL_CLOCK_OUT_DISABLE,
	.output_load = MXL5005S_IF_OUTPUT_LOAD_200_OHM,
	.top = MXL5005S_TOP_25P2,
	.mod_mode = MXL_DIGITAL_MODE,
	.if_mode = MXL_ZERO_IF,
	.AgcMasterByte = 0x00,
	};

	static int ec168_mxl5003s_tuner_attach(struct dvb_usb_adapter *adap)
	{
	deb_info("%s:\n", __func__);
	return dvb_attach(mxl5005s_attach, adap->fe_adap[0].fe, &adap->dev->i2c_adap,
	&ec168_mxl5003s_config) == NULL ? -ENODEV : 0;
	}

	static int ec168_streaming_ctrl(struct dvb_usb_adapter *adap, int onoff)
	{
	struct ec168_req req = {STREAMING_CTRL, 0x7f01, 0x0202, 0, NULL};
	deb_info("%s: onoff:%d\n", __func__, onoff);
	if (onoff)
	req.index = 0x0102;
	return ec168_ctrl_msg(adap->dev, &req);
	}

	static int ec168_download_firmware(struct usb_device *udev,
	const struct firmware *fw)
	{
	int i, len, packets, remainder, ret;
	u16 addr = 0x0000; /* firmware start address */
	struct ec168_req req = {DOWNLOAD_FIRMWARE, 0, 0, 0, NULL};
	deb_info("%s:\n", __func__);

	#define FW_PACKET_MAX_DATA 2048
	packets = fw->size / FW_PACKET_MAX_DATA;
	remainder = fw->size % FW_PACKET_MAX_DATA;
	len = FW_PACKET_MAX_DATA;
	for (i = 0; i <= packets; i++) {
	if (i == packets) /* set size of the last packet */
	len = remainder;

	req.size = len;
	req.data = (u8 )(fw->data + i FW_PACKET_MAX_DATA);
	req.index = addr;
	addr += FW_PACKET_MAX_DATA;

	ret = ec168_rw_udev(udev, &req);
	if (ret) {
	err("firmware download failed:%d packet:%d", ret, i);
	goto error;
	}
	}
	req.size = 0;

	/* set "warm"? */
	req.cmd = SET_CONFIG;
	req.value = 0;
	req.index = 0x0001;
	ret = ec168_rw_udev(udev, &req);
	if (ret)
	goto error;

	/* really needed - no idea what does */
	req.cmd = GPIO;
	req.value = 0;
	req.index = 0x0206;
	ret = ec168_rw_udev(udev, &req);
	if (ret)
	goto error;

	/* activate tuner I2C? */
	req.cmd = WRITE_I2C;
	req.value = 0;
	req.index = 0x00c6;
	ret = ec168_rw_udev(udev, &req);
	if (ret)
	goto error;

	return ret;
	error:
	deb_info("%s: failed:%d\n", __func__, ret);
	return ret;
	}

	static int ec168_identify_state(struct usb_device *udev,
	struct dvb_usb_device_properties *props,
	struct dvb_usb_device_description *desc, int cold)
	{
	int ret;
	u8 reply;
	struct ec168_req req = {GET_CONFIG, 0, 1, sizeof(reply), &reply};
	deb_info("%s:\n", __func__);

	ret = ec168_rw_udev(udev, &req);
	if (ret)
	goto error;

	deb_info("%s: reply:%02x\n", __func__, reply);

	if (reply == 0x01)
	*cold = 0;
	else
	*cold = 1;

	return ret;
	error:
	deb_info("%s: failed:%d\n", __func__, ret);
	return ret;
	}

	/* DVB USB Driver stuff */
	static struct dvb_usb_device_properties ec168_properties;

	static int ec168_probe(struct usb_interface *intf,
	const struct usb_device_id *id)
	{
	int ret;
	deb_info("%s: interface:%d\n", __func__,
	intf->cur_altsetting->desc.bInterfaceNumber);

	ret = dvb_usb_device_init(intf, &ec168_properties, THIS_MODULE, NULL,
	adapter_nr);
	if (ret)
	goto error;

	return ret;
	error:
	deb_info("%s: failed:%d\n", __func__, ret);
	return ret;
	}

	#define E3C_EC168_1689 0
	#define E3C_EC168_FFFA 1
	#define E3C_EC168_FFFB 2
	#define E3C_EC168_1001 3
	#define E3C_EC168_1002 4

	static struct usb_device_id ec168_id[] = {
	[E3C_EC168_1689] =
	{USB_DEVICE(USB_VID_E3C, USB_PID_E3C_EC168)},
	[E3C_EC168_FFFA] =
	{USB_DEVICE(USB_VID_E3C, USB_PID_E3C_EC168_2)},
	[E3C_EC168_FFFB] =
	{USB_DEVICE(USB_VID_E3C, USB_PID_E3C_EC168_3)},
	[E3C_EC168_1001] =
	{USB_DEVICE(USB_VID_E3C, USB_PID_E3C_EC168_4)},
	[E3C_EC168_1002] =
	{USB_DEVICE(USB_VID_E3C, USB_PID_E3C_EC168_5)},
	{} /* terminating entry */
	};

	MODULE_DEVICE_TABLE(usb, ec168_id);

	static struct dvb_usb_device_properties ec168_properties = {
	.caps = DVB_USB_IS_AN_I2C_ADAPTER,

	.usb_ctrl = DEVICE_SPECIFIC,
	.download_firmware = ec168_download_firmware,
	.firmware = "dvb-usb-ec168.fw",
	.no_reconnect = 1,

	.size_of_priv = 0,

	.num_adapters = 1,
	.adapter = {
	{
	.num_frontends = 1,
	.fe = {{
	.streaming_ctrl = ec168_streaming_ctrl,
	.frontend_attach = ec168_ec100_frontend_attach,
	.tuner_attach = ec168_mxl5003s_tuner_attach,
	.stream = {
	.type = USB_BULK,
	.count = 6,
	.endpoint = 0x82,
	.u = {
	.bulk = {
	.buffersize = (32*512),
	}
	}
	},
	}},
	}
	},

	.identify_state = ec168_identify_state,

	.i2c_algo = &ec168_i2c_algo,

	.num_device_descs = 1,
	.devices = {
	{
	.name = "E3C EC168 DVB-T USB2.0 reference design",
	.cold_ids = {
	&ec168_id[E3C_EC168_1689],
	&ec168_id[E3C_EC168_FFFA],
	&ec168_id[E3C_EC168_FFFB],
	&ec168_id[E3C_EC168_1001],
	&ec168_id[E3C_EC168_1002],
	NULL},
	.warm_ids = {NULL},
	},
	}
	};

	static struct usb_driver ec168_driver = {
	.name = "dvb_usb_ec168",
	.probe = ec168_probe,
	.disconnect = dvb_usb_device_exit,
	.id_table = ec168_id,
	};

	/* module stuff */
	static int __init ec168_module_init(void)
	{
	int ret;
	deb_info("%s:\n", __func__);
	ret = usb_register(&ec168_driver);
	if (ret)
	err("module init failed:%d", ret);

	return ret;
	}

	static void __exit ec168_module_exit(void)
	{
	deb_info("%s:\n", __func__);
	/* deregister this driver from the USB subsystem */
	usb_deregister(&ec168_driver);
	}

	module_init(ec168_module_init);
	module_exit(ec168_module_exit);

	MODULE_AUTHOR("Antti Palosaari <crope@iki.fi>");
	MODULE_DESCRIPTION("E3C EC168 DVB-T USB2.0 driver");
	MODULE_LICENSE("GPL");