drivers/media/usb/dvb-usb/friio.c - kernel/quantenna - Git at Google

 /* DVB USB compliant Linux driver for the Friio USB2.0 ISDB-T receiver.
  *
  * Copyright (C) 2009 Akihiro Tsukada <tskd2@yahoo.co.jp>
  *
  * This module is based off the the gl861 and vp702x modules.
  *
  * 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, version 2.
  *
  * see Documentation/dvb/README.dvb-usb for more information
  */
 #include "friio.h"

 /* debug */
 int dvb_usb_friio_debug;
 module_param_named(debug, dvb_usb_friio_debug, int, 0644);
 MODULE_PARM_DESC(debug,
 		 "set debugging level (1=info,2=xfer,4=rc,8=fe (or-able))."
 		 DVB_USB_DEBUG_STATUS);

 DVB_DEFINE_MOD_OPT_ADAPTER_NR(adapter_nr);

 /**
  * Indirect I2C access to the PLL via FE.
  * whole I2C protocol data to the PLL is sent via the FE's I2C register.
  * This is done by a control msg to the FE with the I2C data accompanied, and
  * a specific USB request number is assigned for that purpose.
  *
  * this func sends wbuf[1..] to the I2C register wbuf[0] at addr (= at FE).
  * TODO: refoctored, smarter i2c functions.
  */
 static int gl861_i2c_ctrlmsg_data(struct dvb_usb_device *d, u8 addr,
 				  u8 *wbuf, u16 wlen, u8 *rbuf, u16 rlen)
 {
 	u16 index = wbuf[0];	/* must be JDVBT90502_2ND_I2C_REG(=0xFE) */
 	u16 value = addr << (8 + 1);
 	int wo = (rbuf == NULL || rlen == 0);	/* write only */
 	u8 req, type;

 	deb_xfer("write to PLL:0x%02x via FE reg:0x%02x, len:%d\n",
 		 wbuf[1], wbuf[0], wlen - 1);

 	if (wo && wlen >= 2) {
 		req = GL861_REQ_I2C_DATA_CTRL_WRITE;
 		type = GL861_WRITE;
 		udelay(20);
 		return usb_control_msg(d->udev, usb_sndctrlpipe(d->udev, 0),
 				       req, type, value, index,
 				       &wbuf[1], wlen - 1, 2000);
 	}

 	deb_xfer("not supported ctrl-msg, aborting.");
 	return -EINVAL;
 }

 /* normal I2C access (without extra data arguments).
  * write to the register wbuf[0] at I2C address addr with the value wbuf[1],
  *  or read from the register wbuf[0].
  * register address can be 16bit (wbuf[2]<<8 | wbuf[0]) if wlen==3
  */
 static int gl861_i2c_msg(struct dvb_usb_device *d, u8 addr,
 			 u8 *wbuf, u16 wlen, u8 *rbuf, u16 rlen)
 {
 	u16 index;
 	u16 value = addr << (8 + 1);
 	int wo = (rbuf == NULL || rlen == 0);	/* write-only */
 	u8 req, type;
 	unsigned int pipe;

 	/* special case for the indirect I2C access to the PLL via FE, */
 	if (addr == friio_fe_config.demod_address &&
 	    wbuf[0] == JDVBT90502_2ND_I2C_REG)
 		return gl861_i2c_ctrlmsg_data(d, addr, wbuf, wlen, rbuf, rlen);

 	if (wo) {
 		req = GL861_REQ_I2C_WRITE;
 		type = GL861_WRITE;
 		pipe = usb_sndctrlpipe(d->udev, 0);
 	} else {		/* rw */
 		req = GL861_REQ_I2C_READ;
 		type = GL861_READ;
 		pipe = usb_rcvctrlpipe(d->udev, 0);
 	}

 	switch (wlen) {
 	case 1:
 		index = wbuf[0];
 		break;
 	case 2:
 		index = wbuf[0];
 		value = value + wbuf[1];
 		break;
 	case 3:
 		/* special case for 16bit register-address */
 		index = (wbuf[2] << 8) | wbuf[0];
 		value = value + wbuf[1];
 		break;
 	default:
 		deb_xfer("wlen = %x, aborting.", wlen);
 		return -EINVAL;
 	}
 	msleep(1);
 	return usb_control_msg(d->udev, pipe, req, type,
 			       value, index, rbuf, rlen, 2000);
 }

 /* I2C */
 static int gl861_i2c_xfer(struct i2c_adapter *adap, struct i2c_msg msg[],
 			  int num)
 {
 	struct dvb_usb_device *d = i2c_get_adapdata(adap);
 	int i;


 	if (num > 2)
 		return -EINVAL;

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

 	for (i = 0; i < num; i++) {
 		/* write/read request */
 		if (i + 1 < num && (msg[i + 1].flags & I2C_M_RD)) {
 			if (gl861_i2c_msg(d, msg[i].addr,
 					  msg[i].buf, msg[i].len,
 					  msg[i + 1].buf, msg[i + 1].len) < 0)
 				break;
 			i++;
 		} else
 			if (gl861_i2c_msg(d, msg[i].addr, msg[i].buf,
 					  msg[i].len, NULL, 0) < 0)
 				break;
 	}

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

 static u32 gl861_i2c_func(struct i2c_adapter *adapter)
 {
 	return I2C_FUNC_I2C;
 }

 static int friio_ext_ctl(struct dvb_usb_adapter *adap,
 			 u32 sat_color, int lnb_on)
 {
 	int i;
 	int ret;
 	struct i2c_msg msg;
 	u8 *buf;
 	u32 mask;
 	u8 lnb = (lnb_on) ? FRIIO_CTL_LNB : 0;

 	buf = kmalloc(2, GFP_KERNEL);
 	if (!buf)
 		return -ENOMEM;

 	msg.addr = 0x00;
 	msg.flags = 0;
 	msg.len = 2;
 	msg.buf = buf;

 	buf[0] = 0x00;

 	/* send 2bit header (&B10) */
 	buf[1] = lnb | FRIIO_CTL_LED | FRIIO_CTL_STROBE;
 	ret = gl861_i2c_xfer(&adap->dev->i2c_adap, &msg, 1);
 	buf[1] |= FRIIO_CTL_CLK;
 	ret += gl861_i2c_xfer(&adap->dev->i2c_adap, &msg, 1);

 	buf[1] = lnb | FRIIO_CTL_STROBE;
 	ret += gl861_i2c_xfer(&adap->dev->i2c_adap, &msg, 1);
 	buf[1] |= FRIIO_CTL_CLK;
 	ret += gl861_i2c_xfer(&adap->dev->i2c_adap, &msg, 1);

 	/* send 32bit(satur, R, G, B) data in serial */
 	mask = 1 << 31;
 	for (i = 0; i < 32; i++) {
 		buf[1] = lnb | FRIIO_CTL_STROBE;
 		if (sat_color & mask)
 			buf[1] |= FRIIO_CTL_LED;
 		ret += gl861_i2c_xfer(&adap->dev->i2c_adap, &msg, 1);
 		buf[1] |= FRIIO_CTL_CLK;
 		ret += gl861_i2c_xfer(&adap->dev->i2c_adap, &msg, 1);
 		mask >>= 1;
 	}

 	/* set the strobe off */
 	buf[1] = lnb;
 	ret += gl861_i2c_xfer(&adap->dev->i2c_adap, &msg, 1);
 	buf[1] |= FRIIO_CTL_CLK;
 	ret += gl861_i2c_xfer(&adap->dev->i2c_adap, &msg, 1);

 	kfree(buf);
 	return (ret == 70);
 }


 static int friio_streaming_ctrl(struct dvb_usb_adapter *adap, int onoff);

 /* TODO: move these init cmds to the FE's init routine? */
 static u8 streaming_init_cmds[][2] = {
 	{0x33, 0x08},
 	{0x37, 0x40},
 	{0x3A, 0x1F},
 	{0x3B, 0xFF},
 	{0x3C, 0x1F},
 	{0x3D, 0xFF},
 	{0x38, 0x00},
 	{0x35, 0x00},
 	{0x39, 0x00},
 	{0x36, 0x00},
 };
 static int cmdlen = sizeof(streaming_init_cmds) / 2;

 /*
  * Command sequence in this init function is a replay
  *  of the captured USB commands from the Windows proprietary driver.
  */
 static int friio_initialize(struct dvb_usb_device *d)
 {
 	int ret;
 	int i;
 	int retry = 0;
 	u8 *rbuf, *wbuf;

 	deb_info("%s called.\n", __func__);

 	wbuf = kmalloc(3, GFP_KERNEL);
 	if (!wbuf)
 		return -ENOMEM;

 	rbuf = kmalloc(2, GFP_KERNEL);
 	if (!rbuf) {
 		kfree(wbuf);
 		return -ENOMEM;
 	}

 	/* use gl861_i2c_msg instead of gl861_i2c_xfer(), */
 	/* because the i2c device is not set up yet. */
 	wbuf[0] = 0x11;
 	wbuf[1] = 0x02;
 	ret = gl861_i2c_msg(d, 0x00, wbuf, 2, NULL, 0);
 	if (ret < 0)
 		goto error;
 	msleep(2);

 	wbuf[0] = 0x11;
 	wbuf[1] = 0x00;
 	ret = gl861_i2c_msg(d, 0x00, wbuf, 2, NULL, 0);
 	if (ret < 0)
 		goto error;
 	msleep(1);

 	/* following msgs should be in the FE's init code? */
 	/* cmd sequence to identify the device type? (friio black/white) */
 	wbuf[0] = 0x03;
 	wbuf[1] = 0x80;
 	/* can't use gl861_i2c_cmd, as the register-addr is 16bit(0x0100) */
 	ret = usb_control_msg(d->udev, usb_sndctrlpipe(d->udev, 0),
 			      GL861_REQ_I2C_DATA_CTRL_WRITE, GL861_WRITE,
 			      0x1200, 0x0100, wbuf, 2, 2000);
 	if (ret < 0)
 		goto error;

 	msleep(2);
 	wbuf[0] = 0x00;
 	wbuf[2] = 0x01;		/* reg.0x0100 */
 	wbuf[1] = 0x00;
 	ret = gl861_i2c_msg(d, 0x12 >> 1, wbuf, 3, rbuf, 2);
 	/* my Friio White returns 0xffff. */
 	if (ret < 0 || rbuf[0] != 0xff || rbuf[1] != 0xff)
 		goto error;

 	msleep(2);
 	wbuf[0] = 0x03;
 	wbuf[1] = 0x80;
 	ret = usb_control_msg(d->udev, usb_sndctrlpipe(d->udev, 0),
 			      GL861_REQ_I2C_DATA_CTRL_WRITE, GL861_WRITE,
 			      0x9000, 0x0100, wbuf, 2, 2000);
 	if (ret < 0)
 		goto error;

 	msleep(2);
 	wbuf[0] = 0x00;
 	wbuf[2] = 0x01;		/* reg.0x0100 */
 	wbuf[1] = 0x00;
 	ret = gl861_i2c_msg(d, 0x90 >> 1, wbuf, 3, rbuf, 2);
 	/* my Friio White returns 0xffff again. */
 	if (ret < 0 || rbuf[0] != 0xff || rbuf[1] != 0xff)
 		goto error;

 	msleep(1);

 restart:
 	/* ============ start DEMOD init cmds ================== */
 	/* read PLL status to clear the POR bit */
 	wbuf[0] = JDVBT90502_2ND_I2C_REG;
 	wbuf[1] = (FRIIO_PLL_ADDR << 1) + 1;	/* +1 for reading */
 	ret = gl861_i2c_msg(d, FRIIO_DEMOD_ADDR, wbuf, 2, NULL, 0);
 	if (ret < 0)
 		goto error;

 	msleep(5);
 	/* note: DEMODULATOR has 16bit register-address. */
 	wbuf[0] = 0x00;
 	wbuf[2] = 0x01;		/* reg addr: 0x0100 */
 	wbuf[1] = 0x00;		/* val: not used */
 	ret = gl861_i2c_msg(d, FRIIO_DEMOD_ADDR, wbuf, 3, rbuf, 1);
 	if (ret < 0)
 		goto error;
 /*
 	msleep(1);
 	wbuf[0] = 0x80;
 	wbuf[1] = 0x00;
 	ret = gl861_i2c_msg(d, FRIIO_DEMOD_ADDR, wbuf, 2, rbuf, 1);
 	if (ret < 0)
 		goto error;
  */
 	if (rbuf[0] & 0x80) {	/* still in PowerOnReset state? */
 		if (++retry > 3) {
 			deb_info("failed to get the correct"
 				 " FE demod status:0x%02x\n", rbuf[0]);
 			goto error;
 		}
 		msleep(100);
 		goto restart;
 	}

 	/* TODO: check return value in rbuf */
 	/* =========== end DEMOD init cmds ===================== */
 	msleep(1);

 	wbuf[0] = 0x30;
 	wbuf[1] = 0x04;
 	ret = gl861_i2c_msg(d, 0x00, wbuf, 2, NULL, 0);
 	if (ret < 0)
 		goto error;

 	msleep(2);
 	/* following 2 cmds unnecessary? */
 	wbuf[0] = 0x00;
 	wbuf[1] = 0x01;
 	ret = gl861_i2c_msg(d, 0x00, wbuf, 2, NULL, 0);
 	if (ret < 0)
 		goto error;

 	wbuf[0] = 0x06;
 	wbuf[1] = 0x0F;
 	ret = gl861_i2c_msg(d, 0x00, wbuf, 2, NULL, 0);
 	if (ret < 0)
 		goto error;

 	/* some streaming ctl cmds (maybe) */
 	msleep(10);
 	for (i = 0; i < cmdlen; i++) {
 		ret = gl861_i2c_msg(d, 0x00, streaming_init_cmds[i], 2,
 				    NULL, 0);
 		if (ret < 0)
 			goto error;
 		msleep(1);
 	}
 	msleep(20);

 	/* change the LED color etc. */
 	ret = friio_streaming_ctrl(&d->adapter[0], 0);
 	if (ret < 0)
 		goto error;

 	return 0;

 error:
 	kfree(wbuf);
 	kfree(rbuf);
 	deb_info("%s:ret == %d\n", __func__, ret);
 	return -EIO;
 }

 /* Callbacks for DVB USB */

 static int friio_streaming_ctrl(struct dvb_usb_adapter *adap, int onoff)
 {
 	int ret;

 	deb_info("%s called.(%d)\n", __func__, onoff);

 	/* set the LED color and saturation (and LNB on) */
 	if (onoff)
 		ret = friio_ext_ctl(adap, 0x6400ff64, 1);
 	else
 		ret = friio_ext_ctl(adap, 0x96ff00ff, 1);

 	if (ret != 1) {
 		deb_info("%s failed to send cmdx. ret==%d\n", __func__, ret);
 		return -EREMOTEIO;
 	}
 	return 0;
 }

 static int friio_frontend_attach(struct dvb_usb_adapter *adap)
 {
 	if (friio_initialize(adap->dev) < 0)
 		return -EIO;

 	adap->fe_adap[0].fe = jdvbt90502_attach(adap->dev);
 	if (adap->fe_adap[0].fe == NULL)
 		return -EIO;

 	return 0;
 }

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

 static int friio_probe(struct usb_interface *intf,
 		       const struct usb_device_id *id)
 {
 	struct dvb_usb_device *d;
 	struct usb_host_interface *alt;
 	int ret;

 	if (intf->num_altsetting < GL861_ALTSETTING_COUNT)
 		return -ENODEV;

 	alt = usb_altnum_to_altsetting(intf, FRIIO_BULK_ALTSETTING);
 	if (alt == NULL) {
 		deb_rc("not alt found!\n");
 		return -ENODEV;
 	}
 	ret = usb_set_interface(interface_to_usbdev(intf),
 				alt->desc.bInterfaceNumber,
 				alt->desc.bAlternateSetting);
 	if (ret != 0) {
 		deb_rc("failed to set alt-setting!\n");
 		return ret;
 	}

 	ret = dvb_usb_device_init(intf, &friio_properties,
 				  THIS_MODULE, &d, adapter_nr);
 	if (ret == 0)
 		friio_streaming_ctrl(&d->adapter[0], 1);

 	return ret;
 }


 struct jdvbt90502_config friio_fe_config = {
 	.demod_address = FRIIO_DEMOD_ADDR,
 	.pll_address = FRIIO_PLL_ADDR,
 };

 static struct i2c_algorithm gl861_i2c_algo = {
 	.master_xfer   = gl861_i2c_xfer,
 	.functionality = gl861_i2c_func,
 };

 static struct usb_device_id friio_table[] = {
 	{ USB_DEVICE(USB_VID_774, USB_PID_FRIIO_WHITE) },
 	{ }		/* Terminating entry */
 };
 MODULE_DEVICE_TABLE(usb, friio_table);


 static struct dvb_usb_device_properties friio_properties = {
 	.caps = DVB_USB_IS_AN_I2C_ADAPTER,
 	.usb_ctrl = DEVICE_SPECIFIC,

 	.size_of_priv = 0,

 	.num_adapters = 1,
 	.adapter = {
 		/* caps:0 =>  no pid filter, 188B TS packet */
 		/* GL861 has a HW pid filter, but no info available. */
 		{
 		.num_frontends = 1,
 		.fe = {{
 			.caps  = 0,

 			.frontend_attach  = friio_frontend_attach,
 			.streaming_ctrl = friio_streaming_ctrl,

 			.stream = {
 				.type = USB_BULK,
 				/* count <= MAX_NO_URBS_FOR_DATA_STREAM(10) */
 				.count = 8,
 				.endpoint = 0x01,
 				.u = {
 					/* GL861 has 6KB buf inside */
 					.bulk = {
 						.buffersize = 16384,
 					}
 				}
 			},
 		}},
 		}
 	},
 	.i2c_algo = &gl861_i2c_algo,

 	.num_device_descs = 1,
 	.devices = {
 		{
 			.name = "774 Friio ISDB-T USB2.0",
 			.cold_ids = { NULL },
 			.warm_ids = { &friio_table[0], NULL },
 		},
 	}
 };

 static struct usb_driver friio_driver = {
 	.name		= "dvb_usb_friio",
 	.probe		= friio_probe,
 	.disconnect	= dvb_usb_device_exit,
 	.id_table	= friio_table,
 };

 module_usb_driver(friio_driver);

 MODULE_AUTHOR("Akihiro Tsukada <tskd2@yahoo.co.jp>");
 MODULE_DESCRIPTION("Driver for Friio ISDB-T USB2.0 Receiver");
 MODULE_VERSION("0.2");
 MODULE_LICENSE("GPL");
	/* DVB USB compliant Linux driver for the Friio USB2.0 ISDB-T receiver.
	*
	* Copyright (C) 2009 Akihiro Tsukada <tskd2@yahoo.co.jp>
	*
	* This module is based off the the gl861 and vp702x modules.
	*
	* 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, version 2.
	*
	* see Documentation/dvb/README.dvb-usb for more information
	*/
	#include "friio.h"

	/* debug */
	int dvb_usb_friio_debug;
	module_param_named(debug, dvb_usb_friio_debug, int, 0644);
	MODULE_PARM_DESC(debug,
	"set debugging level (1=info,2=xfer,4=rc,8=fe (or-able))."
	DVB_USB_DEBUG_STATUS);

	DVB_DEFINE_MOD_OPT_ADAPTER_NR(adapter_nr);

	/**
	* Indirect I2C access to the PLL via FE.
	* whole I2C protocol data to the PLL is sent via the FE's I2C register.
	* This is done by a control msg to the FE with the I2C data accompanied, and
	* a specific USB request number is assigned for that purpose.
	*
	* this func sends wbuf[1..] to the I2C register wbuf[0] at addr (= at FE).
	* TODO: refoctored, smarter i2c functions.
	*/
	static int gl861_i2c_ctrlmsg_data(struct dvb_usb_device *d, u8 addr,
	u8 wbuf, u16 wlen, u8 rbuf, u16 rlen)
	{
	u16 index = wbuf[0]; /* must be JDVBT90502_2ND_I2C_REG(=0xFE) */
	u16 value = addr << (8 + 1);
	int wo = (rbuf == NULL \|\| rlen == 0); /* write only */
	u8 req, type;

	deb_xfer("write to PLL:0x%02x via FE reg:0x%02x, len:%d\n",
	wbuf[1], wbuf[0], wlen - 1);

	if (wo && wlen >= 2) {
	req = GL861_REQ_I2C_DATA_CTRL_WRITE;
	type = GL861_WRITE;
	udelay(20);
	return usb_control_msg(d->udev, usb_sndctrlpipe(d->udev, 0),
	req, type, value, index,
	&wbuf[1], wlen - 1, 2000);
	}

	deb_xfer("not supported ctrl-msg, aborting.");
	return -EINVAL;
	}

	/* normal I2C access (without extra data arguments).
	* write to the register wbuf[0] at I2C address addr with the value wbuf[1],
	* or read from the register wbuf[0].
	* register address can be 16bit (wbuf[2]<<8 \| wbuf[0]) if wlen==3
	*/
	static int gl861_i2c_msg(struct dvb_usb_device *d, u8 addr,
	u8 wbuf, u16 wlen, u8 rbuf, u16 rlen)
	{
	u16 index;
	u16 value = addr << (8 + 1);
	int wo = (rbuf == NULL \|\| rlen == 0); /* write-only */
	u8 req, type;
	unsigned int pipe;

	/* special case for the indirect I2C access to the PLL via FE, */
	if (addr == friio_fe_config.demod_address &&
	wbuf[0] == JDVBT90502_2ND_I2C_REG)
	return gl861_i2c_ctrlmsg_data(d, addr, wbuf, wlen, rbuf, rlen);

	if (wo) {
	req = GL861_REQ_I2C_WRITE;
	type = GL861_WRITE;
	pipe = usb_sndctrlpipe(d->udev, 0);
	} else { /* rw */
	req = GL861_REQ_I2C_READ;
	type = GL861_READ;
	pipe = usb_rcvctrlpipe(d->udev, 0);
	}

	switch (wlen) {
	case 1:
	index = wbuf[0];
	break;
	case 2:
	index = wbuf[0];
	value = value + wbuf[1];
	break;
	case 3:
	/* special case for 16bit register-address */
	index = (wbuf[2] << 8) \| wbuf[0];
	value = value + wbuf[1];
	break;
	default:
	deb_xfer("wlen = %x, aborting.", wlen);
	return -EINVAL;
	}
	msleep(1);
	return usb_control_msg(d->udev, pipe, req, type,
	value, index, rbuf, rlen, 2000);
	}

	/* I2C */
	static int gl861_i2c_xfer(struct i2c_adapter *adap, struct i2c_msg msg[],
	int num)
	{
	struct dvb_usb_device *d = i2c_get_adapdata(adap);
	int i;


	if (num > 2)
	return -EINVAL;

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

	for (i = 0; i < num; i++) {
	/* write/read request */
	if (i + 1 < num && (msg[i + 1].flags & I2C_M_RD)) {
	if (gl861_i2c_msg(d, msg[i].addr,
	msg[i].buf, msg[i].len,
	msg[i + 1].buf, msg[i + 1].len) < 0)
	break;
	i++;
	} else
	if (gl861_i2c_msg(d, msg[i].addr, msg[i].buf,
	msg[i].len, NULL, 0) < 0)
	break;
	}

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

	static u32 gl861_i2c_func(struct i2c_adapter *adapter)
	{
	return I2C_FUNC_I2C;
	}

	static int friio_ext_ctl(struct dvb_usb_adapter *adap,
	u32 sat_color, int lnb_on)
	{
	int i;
	int ret;
	struct i2c_msg msg;
	u8 *buf;
	u32 mask;
	u8 lnb = (lnb_on) ? FRIIO_CTL_LNB : 0;

	buf = kmalloc(2, GFP_KERNEL);
	if (!buf)
	return -ENOMEM;

	msg.addr = 0x00;
	msg.flags = 0;
	msg.len = 2;
	msg.buf = buf;

	buf[0] = 0x00;

	/* send 2bit header (&B10) */
	buf[1] = lnb \| FRIIO_CTL_LED \| FRIIO_CTL_STROBE;
	ret = gl861_i2c_xfer(&adap->dev->i2c_adap, &msg, 1);
	buf[1] \|= FRIIO_CTL_CLK;
	ret += gl861_i2c_xfer(&adap->dev->i2c_adap, &msg, 1);

	buf[1] = lnb \| FRIIO_CTL_STROBE;
	ret += gl861_i2c_xfer(&adap->dev->i2c_adap, &msg, 1);
	buf[1] \|= FRIIO_CTL_CLK;
	ret += gl861_i2c_xfer(&adap->dev->i2c_adap, &msg, 1);

	/* send 32bit(satur, R, G, B) data in serial */
	mask = 1 << 31;
	for (i = 0; i < 32; i++) {
	buf[1] = lnb \| FRIIO_CTL_STROBE;
	if (sat_color & mask)
	buf[1] \|= FRIIO_CTL_LED;
	ret += gl861_i2c_xfer(&adap->dev->i2c_adap, &msg, 1);
	buf[1] \|= FRIIO_CTL_CLK;
	ret += gl861_i2c_xfer(&adap->dev->i2c_adap, &msg, 1);
	mask >>= 1;
	}

	/* set the strobe off */
	buf[1] = lnb;
	ret += gl861_i2c_xfer(&adap->dev->i2c_adap, &msg, 1);
	buf[1] \|= FRIIO_CTL_CLK;
	ret += gl861_i2c_xfer(&adap->dev->i2c_adap, &msg, 1);

	kfree(buf);
	return (ret == 70);
	}


	static int friio_streaming_ctrl(struct dvb_usb_adapter *adap, int onoff);

	/* TODO: move these init cmds to the FE's init routine? */
	static u8 streaming_init_cmds[][2] = {
	{0x33, 0x08},
	{0x37, 0x40},
	{0x3A, 0x1F},
	{0x3B, 0xFF},
	{0x3C, 0x1F},
	{0x3D, 0xFF},
	{0x38, 0x00},
	{0x35, 0x00},
	{0x39, 0x00},
	{0x36, 0x00},
	};
	static int cmdlen = sizeof(streaming_init_cmds) / 2;

	/*
	* Command sequence in this init function is a replay
	* of the captured USB commands from the Windows proprietary driver.
	*/
	static int friio_initialize(struct dvb_usb_device *d)
	{
	int ret;
	int i;
	int retry = 0;
	u8 rbuf, wbuf;

	deb_info("%s called.\n", __func__);

	wbuf = kmalloc(3, GFP_KERNEL);
	if (!wbuf)
	return -ENOMEM;

	rbuf = kmalloc(2, GFP_KERNEL);
	if (!rbuf) {
	kfree(wbuf);
	return -ENOMEM;
	}

	/* use gl861_i2c_msg instead of gl861_i2c_xfer(), */
	/* because the i2c device is not set up yet. */
	wbuf[0] = 0x11;
	wbuf[1] = 0x02;
	ret = gl861_i2c_msg(d, 0x00, wbuf, 2, NULL, 0);
	if (ret < 0)
	goto error;
	msleep(2);

	wbuf[0] = 0x11;
	wbuf[1] = 0x00;
	ret = gl861_i2c_msg(d, 0x00, wbuf, 2, NULL, 0);
	if (ret < 0)
	goto error;
	msleep(1);

	/* following msgs should be in the FE's init code? */
	/* cmd sequence to identify the device type? (friio black/white) */
	wbuf[0] = 0x03;
	wbuf[1] = 0x80;
	/* can't use gl861_i2c_cmd, as the register-addr is 16bit(0x0100) */
	ret = usb_control_msg(d->udev, usb_sndctrlpipe(d->udev, 0),
	GL861_REQ_I2C_DATA_CTRL_WRITE, GL861_WRITE,
	0x1200, 0x0100, wbuf, 2, 2000);
	if (ret < 0)
	goto error;

	msleep(2);
	wbuf[0] = 0x00;
	wbuf[2] = 0x01; /* reg.0x0100 */
	wbuf[1] = 0x00;
	ret = gl861_i2c_msg(d, 0x12 >> 1, wbuf, 3, rbuf, 2);
	/* my Friio White returns 0xffff. */
	if (ret < 0 \|\| rbuf[0] != 0xff \|\| rbuf[1] != 0xff)
	goto error;

	msleep(2);
	wbuf[0] = 0x03;
	wbuf[1] = 0x80;
	ret = usb_control_msg(d->udev, usb_sndctrlpipe(d->udev, 0),
	GL861_REQ_I2C_DATA_CTRL_WRITE, GL861_WRITE,
	0x9000, 0x0100, wbuf, 2, 2000);
	if (ret < 0)
	goto error;

	msleep(2);
	wbuf[0] = 0x00;
	wbuf[2] = 0x01; /* reg.0x0100 */
	wbuf[1] = 0x00;
	ret = gl861_i2c_msg(d, 0x90 >> 1, wbuf, 3, rbuf, 2);
	/* my Friio White returns 0xffff again. */
	if (ret < 0 \|\| rbuf[0] != 0xff \|\| rbuf[1] != 0xff)
	goto error;

	msleep(1);

	restart:
	/* ============ start DEMOD init cmds ================== */
	/* read PLL status to clear the POR bit */
	wbuf[0] = JDVBT90502_2ND_I2C_REG;
	wbuf[1] = (FRIIO_PLL_ADDR << 1) + 1; /* +1 for reading */
	ret = gl861_i2c_msg(d, FRIIO_DEMOD_ADDR, wbuf, 2, NULL, 0);
	if (ret < 0)
	goto error;

	msleep(5);
	/* note: DEMODULATOR has 16bit register-address. */
	wbuf[0] = 0x00;
	wbuf[2] = 0x01; /* reg addr: 0x0100 */
	wbuf[1] = 0x00; /* val: not used */
	ret = gl861_i2c_msg(d, FRIIO_DEMOD_ADDR, wbuf, 3, rbuf, 1);
	if (ret < 0)
	goto error;
	/*
	msleep(1);
	wbuf[0] = 0x80;
	wbuf[1] = 0x00;
	ret = gl861_i2c_msg(d, FRIIO_DEMOD_ADDR, wbuf, 2, rbuf, 1);
	if (ret < 0)
	goto error;
	*/
	if (rbuf[0] & 0x80) { /* still in PowerOnReset state? */
	if (++retry > 3) {
	deb_info("failed to get the correct"
	" FE demod status:0x%02x\n", rbuf[0]);
	goto error;
	}
	msleep(100);
	goto restart;
	}

	/* TODO: check return value in rbuf */
	/* =========== end DEMOD init cmds ===================== */
	msleep(1);

	wbuf[0] = 0x30;
	wbuf[1] = 0x04;
	ret = gl861_i2c_msg(d, 0x00, wbuf, 2, NULL, 0);
	if (ret < 0)
	goto error;

	msleep(2);
	/* following 2 cmds unnecessary? */
	wbuf[0] = 0x00;
	wbuf[1] = 0x01;
	ret = gl861_i2c_msg(d, 0x00, wbuf, 2, NULL, 0);
	if (ret < 0)
	goto error;

	wbuf[0] = 0x06;
	wbuf[1] = 0x0F;
	ret = gl861_i2c_msg(d, 0x00, wbuf, 2, NULL, 0);
	if (ret < 0)
	goto error;

	/* some streaming ctl cmds (maybe) */
	msleep(10);
	for (i = 0; i < cmdlen; i++) {
	ret = gl861_i2c_msg(d, 0x00, streaming_init_cmds[i], 2,
	NULL, 0);
	if (ret < 0)
	goto error;
	msleep(1);
	}
	msleep(20);

	/* change the LED color etc. */
	ret = friio_streaming_ctrl(&d->adapter[0], 0);
	if (ret < 0)
	goto error;

	return 0;

	error:
	kfree(wbuf);
	kfree(rbuf);
	deb_info("%s:ret == %d\n", __func__, ret);
	return -EIO;
	}

	/* Callbacks for DVB USB */

	static int friio_streaming_ctrl(struct dvb_usb_adapter *adap, int onoff)
	{
	int ret;

	deb_info("%s called.(%d)\n", __func__, onoff);

	/* set the LED color and saturation (and LNB on) */
	if (onoff)
	ret = friio_ext_ctl(adap, 0x6400ff64, 1);
	else
	ret = friio_ext_ctl(adap, 0x96ff00ff, 1);

	if (ret != 1) {
	deb_info("%s failed to send cmdx. ret==%d\n", __func__, ret);
	return -EREMOTEIO;
	}
	return 0;
	}

	static int friio_frontend_attach(struct dvb_usb_adapter *adap)
	{
	if (friio_initialize(adap->dev) < 0)
	return -EIO;

	adap->fe_adap[0].fe = jdvbt90502_attach(adap->dev);
	if (adap->fe_adap[0].fe == NULL)
	return -EIO;

	return 0;
	}

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

	static int friio_probe(struct usb_interface *intf,
	const struct usb_device_id *id)
	{
	struct dvb_usb_device *d;
	struct usb_host_interface *alt;
	int ret;

	if (intf->num_altsetting < GL861_ALTSETTING_COUNT)
	return -ENODEV;

	alt = usb_altnum_to_altsetting(intf, FRIIO_BULK_ALTSETTING);
	if (alt == NULL) {
	deb_rc("not alt found!\n");
	return -ENODEV;
	}
	ret = usb_set_interface(interface_to_usbdev(intf),
	alt->desc.bInterfaceNumber,
	alt->desc.bAlternateSetting);
	if (ret != 0) {
	deb_rc("failed to set alt-setting!\n");
	return ret;
	}

	ret = dvb_usb_device_init(intf, &friio_properties,
	THIS_MODULE, &d, adapter_nr);
	if (ret == 0)
	friio_streaming_ctrl(&d->adapter[0], 1);

	return ret;
	}


	struct jdvbt90502_config friio_fe_config = {
	.demod_address = FRIIO_DEMOD_ADDR,
	.pll_address = FRIIO_PLL_ADDR,
	};

	static struct i2c_algorithm gl861_i2c_algo = {
	.master_xfer = gl861_i2c_xfer,
	.functionality = gl861_i2c_func,
	};

	static struct usb_device_id friio_table[] = {
	{ USB_DEVICE(USB_VID_774, USB_PID_FRIIO_WHITE) },
	{ } /* Terminating entry */
	};
	MODULE_DEVICE_TABLE(usb, friio_table);


	static struct dvb_usb_device_properties friio_properties = {
	.caps = DVB_USB_IS_AN_I2C_ADAPTER,
	.usb_ctrl = DEVICE_SPECIFIC,

	.size_of_priv = 0,

	.num_adapters = 1,
	.adapter = {
	/* caps:0 => no pid filter, 188B TS packet */
	/* GL861 has a HW pid filter, but no info available. */
	{
	.num_frontends = 1,
	.fe = {{
	.caps = 0,

	.frontend_attach = friio_frontend_attach,
	.streaming_ctrl = friio_streaming_ctrl,

	.stream = {
	.type = USB_BULK,
	/* count <= MAX_NO_URBS_FOR_DATA_STREAM(10) */
	.count = 8,
	.endpoint = 0x01,
	.u = {
	/* GL861 has 6KB buf inside */
	.bulk = {
	.buffersize = 16384,
	}
	}
	},
	}},
	}
	},
	.i2c_algo = &gl861_i2c_algo,

	.num_device_descs = 1,
	.devices = {
	{
	.name = "774 Friio ISDB-T USB2.0",
	.cold_ids = { NULL },
	.warm_ids = { &friio_table[0], NULL },
	},
	}
	};

	static struct usb_driver friio_driver = {
	.name = "dvb_usb_friio",
	.probe = friio_probe,
	.disconnect = dvb_usb_device_exit,
	.id_table = friio_table,
	};

	module_usb_driver(friio_driver);

	MODULE_AUTHOR("Akihiro Tsukada <tskd2@yahoo.co.jp>");
	MODULE_DESCRIPTION("Driver for Friio ISDB-T USB2.0 Receiver");
	MODULE_VERSION("0.2");
	MODULE_LICENSE("GPL");