drivers/media/usb/dvb-usb/technisat-usb2.c - kernel/msm-4.9 - Gitiles

 /*
  * Linux driver for Technisat DVB-S/S2 USB 2.0 device
  *
  * Copyright (C) 2010 Patrick Boettcher,
  *                    Kernel Labs Inc. PO Box 745, St James, NY 11780
  *
  * Development was sponsored by Technisat Digital UK Limited, whose
  * registered office is Witan Gate House 500 - 600 Witan Gate West,
  * Milton Keynes, MK9 1SH
  *
  * 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.
  *
  *
  * 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.
  *
  * THIS PROGRAM IS PROVIDED "AS IS" AND BOTH THE COPYRIGHT HOLDER AND
  * TECHNISAT DIGITAL UK LTD DISCLAIM ALL WARRANTIES WITH REGARD TO
  * THIS PROGRAM INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY OR
  * FITNESS FOR A PARTICULAR PURPOSE.  NEITHER THE COPYRIGHT HOLDER
  * NOR TECHNISAT DIGITAL UK LIMITED SHALL BE LIABLE FOR ANY SPECIAL,
  * DIRECT, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER
  * RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
  * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR
  * IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS PROGRAM. See the
  * GNU General Public License for more details.
  */

 #define DVB_USB_LOG_PREFIX "technisat-usb2"
 #include "dvb-usb.h"

 #include "stv6110x.h"
 #include "stv090x.h"

 /* module parameters */
 DVB_DEFINE_MOD_OPT_ADAPTER_NR(adapter_nr);

 static int debug;
 module_param(debug, int, 0644);
 MODULE_PARM_DESC(debug,
 		"set debugging level (bit-mask: 1=info,2=eeprom,4=i2c,8=rc)." \
 		DVB_USB_DEBUG_STATUS);

 /* disables all LED control command and
  * also does not start the signal polling thread */
 static int disable_led_control;
 module_param(disable_led_control, int, 0444);
 MODULE_PARM_DESC(disable_led_control,
 		"disable LED control of the device "
 		"(default: 0 - LED control is active).");

 /* device private data */
 struct technisat_usb2_state {
 	struct dvb_usb_device *dev;
 	struct delayed_work green_led_work;
 	u8 power_state;

 	u16 last_scan_code;
 };

 /* debug print helpers */
 #define deb_info(args...)    dprintk(debug, 0x01, args)
 #define deb_eeprom(args...)  dprintk(debug, 0x02, args)
 #define deb_i2c(args...)     dprintk(debug, 0x04, args)
 #define deb_rc(args...)      dprintk(debug, 0x08, args)

 /* vendor requests */
 #define SET_IFCLK_TO_EXTERNAL_TSCLK_VENDOR_REQUEST 0xB3
 #define SET_FRONT_END_RESET_VENDOR_REQUEST         0xB4
 #define GET_VERSION_INFO_VENDOR_REQUEST            0xB5
 #define SET_GREEN_LED_VENDOR_REQUEST               0xB6
 #define SET_RED_LED_VENDOR_REQUEST                 0xB7
 #define GET_IR_DATA_VENDOR_REQUEST                 0xB8
 #define SET_LED_TIMER_DIVIDER_VENDOR_REQUEST       0xB9
 #define SET_USB_REENUMERATION                      0xBA

 /* i2c-access methods */
 #define I2C_SPEED_100KHZ_BIT 0x40

 #define I2C_STATUS_NAK 7
 #define I2C_STATUS_OK 8

 static int technisat_usb2_i2c_access(struct usb_device *udev,
 		u8 device_addr, u8 *tx, u8 txlen, u8 *rx, u8 rxlen)
 {
 	u8 b[64];
 	int ret, actual_length;

 	deb_i2c("i2c-access: %02x, tx: ", device_addr);
 	debug_dump(tx, txlen, deb_i2c);
 	deb_i2c(" ");

 	if (txlen > 62) {
 		err("i2c TX buffer can't exceed 62 bytes (dev 0x%02x)",
 				device_addr);
 		txlen = 62;
 	}
 	if (rxlen > 62) {
 		err("i2c RX buffer can't exceed 62 bytes (dev 0x%02x)",
 				device_addr);
 		rxlen = 62;
 	}

 	b[0] = I2C_SPEED_100KHZ_BIT;
 	b[1] = device_addr << 1;

 	if (rx != NULL) {
 		b[0] |= rxlen;
 		b[1] |= 1;
 	}

 	memcpy(&b[2], tx, txlen);
 	ret = usb_bulk_msg(udev,
 			usb_sndbulkpipe(udev, 0x01),
 			b, 2 + txlen,
 			NULL, 1000);

 	if (ret < 0) {
 		err("i2c-error: out failed %02x = %d", device_addr, ret);
 		return -ENODEV;
 	}

 	ret = usb_bulk_msg(udev,
 			usb_rcvbulkpipe(udev, 0x01),
 			b, 64, &actual_length, 1000);
 	if (ret < 0) {
 		err("i2c-error: in failed %02x = %d", device_addr, ret);
 		return -ENODEV;
 	}

 	if (b[0] != I2C_STATUS_OK) {
 		err("i2c-error: %02x = %d", device_addr, b[0]);
 		/* handle tuner-i2c-nak */
 		if (!(b[0] == I2C_STATUS_NAK &&
 				device_addr == 0x60
 				/* && device_is_technisat_usb2 */))
 			return -ENODEV;
 	}

 	deb_i2c("status: %d, ", b[0]);

 	if (rx != NULL) {
 		memcpy(rx, &b[2], rxlen);

 		deb_i2c("rx (%d): ", rxlen);
 		debug_dump(rx, rxlen, deb_i2c);
 	}

 	deb_i2c("\n");

 	return 0;
 }

 static int technisat_usb2_i2c_xfer(struct i2c_adapter *adap, struct i2c_msg *msg,
 				int num)
 {
 	int ret = 0, i;
 	struct dvb_usb_device *d = i2c_get_adapdata(adap);

 	/* Ensure nobody else hits the i2c bus while we're sending our
 	   sequence of messages, (such as the remote control thread) */
 	if (mutex_lock_interruptible(&d->i2c_mutex) < 0)
 		return -EAGAIN;

 	for (i = 0; i < num; i++) {
 		if (i+1 < num && msg[i+1].flags & I2C_M_RD) {
 			ret = technisat_usb2_i2c_access(d->udev, msg[i+1].addr,
 						msg[i].buf, msg[i].len,
 						msg[i+1].buf, msg[i+1].len);
 			if (ret != 0)
 				break;
 			i++;
 		} else {
 			ret = technisat_usb2_i2c_access(d->udev, msg[i].addr,
 						msg[i].buf, msg[i].len,
 						NULL, 0);
 			if (ret != 0)
 				break;
 		}
 	}

 	if (ret == 0)
 		ret = i;

 	mutex_unlock(&d->i2c_mutex);

 	return ret;
 }

 static u32 technisat_usb2_i2c_func(struct i2c_adapter *adapter)
 {
 	return I2C_FUNC_I2C;
 }

 static struct i2c_algorithm technisat_usb2_i2c_algo = {
 	.master_xfer   = technisat_usb2_i2c_xfer,
 	.functionality = technisat_usb2_i2c_func,
 };

 #if 0
 static void technisat_usb2_frontend_reset(struct usb_device *udev)
 {
 	usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
 			SET_FRONT_END_RESET_VENDOR_REQUEST,
 			USB_TYPE_VENDOR | USB_DIR_OUT,
 			10, 0,
 			NULL, 0, 500);
 }
 #endif

 /* LED control */
 enum technisat_usb2_led_state {
 	TECH_LED_OFF,
 	TECH_LED_BLINK,
 	TECH_LED_ON,
 	TECH_LED_UNDEFINED
 };

 static int technisat_usb2_set_led(struct dvb_usb_device *d, int red, enum technisat_usb2_led_state state)
 {
 	int ret;

 	u8 led[8] = {
 		red ? SET_RED_LED_VENDOR_REQUEST : SET_GREEN_LED_VENDOR_REQUEST,
 		0
 	};

 	if (disable_led_control && state != TECH_LED_OFF)
 		return 0;

 	switch (state) {
 	case TECH_LED_ON:
 		led[1] = 0x82;
 		break;
 	case TECH_LED_BLINK:
 		led[1] = 0x82;
 		if (red) {
 			led[2] = 0x02;
 			led[3] = 10;
 			led[4] = 10;
 		} else {
 			led[2] = 0xff;
 			led[3] = 50;
 			led[4] = 50;
 		}
 		led[5] = 1;
 		break;

 	default:
 	case TECH_LED_OFF:
 		led[1] = 0x80;
 		break;
 	}

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

 	ret = usb_control_msg(d->udev, usb_sndctrlpipe(d->udev, 0),
 		red ? SET_RED_LED_VENDOR_REQUEST : SET_GREEN_LED_VENDOR_REQUEST,
 		USB_TYPE_VENDOR | USB_DIR_OUT,
 		0, 0,
 		led, sizeof(led), 500);

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

 static int technisat_usb2_set_led_timer(struct dvb_usb_device *d, u8 red, u8 green)
 {
 	int ret;
 	u8 b = 0;

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

 	ret = usb_control_msg(d->udev, usb_sndctrlpipe(d->udev, 0),
 		SET_LED_TIMER_DIVIDER_VENDOR_REQUEST,
 		USB_TYPE_VENDOR | USB_DIR_OUT,
 		(red << 8) | green, 0,
 		&b, 1, 500);

 	mutex_unlock(&d->i2c_mutex);

 	return ret;
 }

 static void technisat_usb2_green_led_control(struct work_struct *work)
 {
 	struct technisat_usb2_state *state =
 		container_of(work, struct technisat_usb2_state, green_led_work.work);
 	struct dvb_frontend *fe = state->dev->adapter[0].fe_adap[0].fe;

 	if (state->power_state == 0)
 		goto schedule;

 	if (fe != NULL) {
 		enum fe_status status;

 		if (fe->ops.read_status(fe, &status) != 0)
 			goto schedule;

 		if (status & FE_HAS_LOCK) {
 			u32 ber;

 			if (fe->ops.read_ber(fe, &ber) != 0)
 				goto schedule;

 			if (ber > 1000)
 				technisat_usb2_set_led(state->dev, 0, TECH_LED_BLINK);
 			else
 				technisat_usb2_set_led(state->dev, 0, TECH_LED_ON);
 		} else
 			technisat_usb2_set_led(state->dev, 0, TECH_LED_OFF);
 	}

 schedule:
 	schedule_delayed_work(&state->green_led_work,
 			msecs_to_jiffies(500));
 }

 /* method to find out whether the firmware has to be downloaded or not */
 static int technisat_usb2_identify_state(struct usb_device *udev,
 		struct dvb_usb_device_properties *props,
 		struct dvb_usb_device_description **desc, int *cold)
 {
 	int ret;
 	u8 version[3];

 	/* first select the interface */
 	if (usb_set_interface(udev, 0, 1) != 0)
 		err("could not set alternate setting to 0");
 	else
 		info("set alternate setting");

 	*cold = 0; /* by default do not download a firmware - just in case something is wrong */

 	ret = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
 		GET_VERSION_INFO_VENDOR_REQUEST,
 		USB_TYPE_VENDOR | USB_DIR_IN,
 		0, 0,
 		version, sizeof(version), 500);

 	if (ret < 0)
 		*cold = 1;
 	else {
 		info("firmware version: %d.%d", version[1], version[2]);
 		*cold = 0;
 	}

 	return 0;
 }

 /* power control */
 static int technisat_usb2_power_ctrl(struct dvb_usb_device *d, int level)
 {
 	struct technisat_usb2_state *state = d->priv;

 	state->power_state = level;

 	if (disable_led_control)
 		return 0;

 	/* green led is turned off in any case - will be turned on when tuning */
 	technisat_usb2_set_led(d, 0, TECH_LED_OFF);
 	/* red led is turned on all the time */
 	technisat_usb2_set_led(d, 1, TECH_LED_ON);
 	return 0;
 }

 /* mac address reading - from the eeprom */
 #if 0
 static void technisat_usb2_eeprom_dump(struct dvb_usb_device *d)
 {
 	u8 reg;
 	u8 b[16];
 	int i, j;

 	/* full EEPROM dump */
 	for (j = 0; j < 256 * 4; j += 16) {
 		reg = j;
 		if (technisat_usb2_i2c_access(d->udev, 0x50 + j / 256, &reg, 1, b, 16) != 0)
 			break;

 		deb_eeprom("EEPROM: %01x%02x: ", j / 256, reg);
 		for (i = 0; i < 16; i++)
 			deb_eeprom("%02x ", b[i]);
 		deb_eeprom("\n");
 	}
 }
 #endif

 static u8 technisat_usb2_calc_lrc(const u8 *b, u16 length)
 {
 	u8 lrc = 0;
 	while (--length)
 		lrc ^= *b++;
 	return lrc;
 }

 static int technisat_usb2_eeprom_lrc_read(struct dvb_usb_device *d,
 	u16 offset, u8 *b, u16 length, u8 tries)
 {
 	u8 bo = offset & 0xff;
 	struct i2c_msg msg[] = {
 		{
 			.addr = 0x50 | ((offset >> 8) & 0x3),
 			.buf = &bo,
 			.len = 1
 		}, {
 			.addr = 0x50 | ((offset >> 8) & 0x3),
 			.flags	= I2C_M_RD,
 			.buf = b,
 			.len = length
 		}
 	};

 	while (tries--) {
 		int status;

 		if (i2c_transfer(&d->i2c_adap, msg, 2) != 2)
 			break;

 		status =
 			technisat_usb2_calc_lrc(b, length - 1) == b[length - 1];

 		if (status)
 			return 0;
 	}

 	return -EREMOTEIO;
 }

 #define EEPROM_MAC_START 0x3f8
 #define EEPROM_MAC_TOTAL 8
 static int technisat_usb2_read_mac_address(struct dvb_usb_device *d,
 		u8 mac[])
 {
 	u8 buf[EEPROM_MAC_TOTAL];

 	if (technisat_usb2_eeprom_lrc_read(d, EEPROM_MAC_START,
 				buf, EEPROM_MAC_TOTAL, 4) != 0)
 		return -ENODEV;

 	memcpy(mac, buf, 6);
 	return 0;
 }

 /* frontend attach */
 static int technisat_usb2_set_voltage(struct dvb_frontend *fe,
 		fe_sec_voltage_t voltage)
 {
 	int i;
 	u8 gpio[3] = { 0 }; /* 0 = 2, 1 = 3, 2 = 4 */

 	gpio[2] = 1; /* high - voltage ? */

 	switch (voltage) {
 	case SEC_VOLTAGE_13:
 		gpio[0] = 1;
 		break;
 	case SEC_VOLTAGE_18:
 		gpio[0] = 1;
 		gpio[1] = 1;
 		break;
 	default:
 	case SEC_VOLTAGE_OFF:
 		break;
 	}

 	for (i = 0; i < 3; i++)
 		if (stv090x_set_gpio(fe, i+2, 0, gpio[i], 0) != 0)
 			return -EREMOTEIO;
 	return 0;
 }

 static struct stv090x_config technisat_usb2_stv090x_config = {
 	.device         = STV0903,
 	.demod_mode     = STV090x_SINGLE,
 	.clk_mode       = STV090x_CLK_EXT,

 	.xtal           = 8000000,
 	.address        = 0x68,

 	.ts1_mode       = STV090x_TSMODE_DVBCI,
 	.ts1_clk        = 13400000,
 	.ts1_tei        = 1,

 	.repeater_level = STV090x_RPTLEVEL_64,

 	.tuner_bbgain   = 6,
 };

 static struct stv6110x_config technisat_usb2_stv6110x_config = {
 	.addr           = 0x60,
 	.refclk         = 16000000,
 	.clk_div        = 2,
 };

 static int technisat_usb2_frontend_attach(struct dvb_usb_adapter *a)
 {
 	struct usb_device *udev = a->dev->udev;
 	int ret;

 	a->fe_adap[0].fe = dvb_attach(stv090x_attach, &technisat_usb2_stv090x_config,
 			&a->dev->i2c_adap, STV090x_DEMODULATOR_0);

 	if (a->fe_adap[0].fe) {
 		struct stv6110x_devctl *ctl;

 		ctl = dvb_attach(stv6110x_attach,
 				a->fe_adap[0].fe,
 				&technisat_usb2_stv6110x_config,
 				&a->dev->i2c_adap);

 		if (ctl) {
 			technisat_usb2_stv090x_config.tuner_init          = ctl->tuner_init;
 			technisat_usb2_stv090x_config.tuner_sleep         = ctl->tuner_sleep;
 			technisat_usb2_stv090x_config.tuner_set_mode      = ctl->tuner_set_mode;
 			technisat_usb2_stv090x_config.tuner_set_frequency = ctl->tuner_set_frequency;
 			technisat_usb2_stv090x_config.tuner_get_frequency = ctl->tuner_get_frequency;
 			technisat_usb2_stv090x_config.tuner_set_bandwidth = ctl->tuner_set_bandwidth;
 			technisat_usb2_stv090x_config.tuner_get_bandwidth = ctl->tuner_get_bandwidth;
 			technisat_usb2_stv090x_config.tuner_set_bbgain    = ctl->tuner_set_bbgain;
 			technisat_usb2_stv090x_config.tuner_get_bbgain    = ctl->tuner_get_bbgain;
 			technisat_usb2_stv090x_config.tuner_set_refclk    = ctl->tuner_set_refclk;
 			technisat_usb2_stv090x_config.tuner_get_status    = ctl->tuner_get_status;

 			/* call the init function once to initialize
 			   tuner's clock output divider and demod's
 			   master clock */
 			if (a->fe_adap[0].fe->ops.init)
 				a->fe_adap[0].fe->ops.init(a->fe_adap[0].fe);

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

 			ret = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
 					SET_IFCLK_TO_EXTERNAL_TSCLK_VENDOR_REQUEST,
 					USB_TYPE_VENDOR | USB_DIR_OUT,
 					0, 0,
 					NULL, 0, 500);
 			mutex_unlock(&a->dev->i2c_mutex);

 			if (ret != 0)
 				err("could not set IF_CLK to external");

 			a->fe_adap[0].fe->ops.set_voltage = technisat_usb2_set_voltage;

 			/* if everything was successful assign a nice name to the frontend */
 			strlcpy(a->fe_adap[0].fe->ops.info.name, a->dev->desc->name,
 					sizeof(a->fe_adap[0].fe->ops.info.name));
 		} else {
 			dvb_frontend_detach(a->fe_adap[0].fe);
 			a->fe_adap[0].fe = NULL;
 		}
 	}

 	technisat_usb2_set_led_timer(a->dev, 1, 1);

 	return a->fe_adap[0].fe == NULL ? -ENODEV : 0;
 }

 /* Remote control */

 /* the device is giving providing raw IR-signals to the host mapping
  * it only to one remote control is just the default implementation
  */
 #define NOMINAL_IR_BIT_TRANSITION_TIME_US 889
 #define NOMINAL_IR_BIT_TIME_US (2 * NOMINAL_IR_BIT_TRANSITION_TIME_US)

 #define FIRMWARE_CLOCK_TICK 83333
 #define FIRMWARE_CLOCK_DIVISOR 256

 #define IR_PERCENT_TOLERANCE 15

 #define NOMINAL_IR_BIT_TRANSITION_TICKS ((NOMINAL_IR_BIT_TRANSITION_TIME_US * 1000 * 1000) / FIRMWARE_CLOCK_TICK)
 #define NOMINAL_IR_BIT_TRANSITION_TICK_COUNT (NOMINAL_IR_BIT_TRANSITION_TICKS / FIRMWARE_CLOCK_DIVISOR)

 #define NOMINAL_IR_BIT_TIME_TICKS ((NOMINAL_IR_BIT_TIME_US * 1000 * 1000) / FIRMWARE_CLOCK_TICK)
 #define NOMINAL_IR_BIT_TIME_TICK_COUNT (NOMINAL_IR_BIT_TIME_TICKS / FIRMWARE_CLOCK_DIVISOR)

 #define MINIMUM_IR_BIT_TRANSITION_TICK_COUNT (NOMINAL_IR_BIT_TRANSITION_TICK_COUNT - ((NOMINAL_IR_BIT_TRANSITION_TICK_COUNT * IR_PERCENT_TOLERANCE) / 100))
 #define MAXIMUM_IR_BIT_TRANSITION_TICK_COUNT (NOMINAL_IR_BIT_TRANSITION_TICK_COUNT + ((NOMINAL_IR_BIT_TRANSITION_TICK_COUNT * IR_PERCENT_TOLERANCE) / 100))

 #define MINIMUM_IR_BIT_TIME_TICK_COUNT (NOMINAL_IR_BIT_TIME_TICK_COUNT - ((NOMINAL_IR_BIT_TIME_TICK_COUNT * IR_PERCENT_TOLERANCE) / 100))
 #define MAXIMUM_IR_BIT_TIME_TICK_COUNT (NOMINAL_IR_BIT_TIME_TICK_COUNT + ((NOMINAL_IR_BIT_TIME_TICK_COUNT * IR_PERCENT_TOLERANCE) / 100))

 static int technisat_usb2_get_ir(struct dvb_usb_device *d)
 {
 	u8 buf[62], *b;
 	int ret;
 	struct ir_raw_event ev;

 	buf[0] = GET_IR_DATA_VENDOR_REQUEST;
 	buf[1] = 0x08;
 	buf[2] = 0x8f;
 	buf[3] = MINIMUM_IR_BIT_TRANSITION_TICK_COUNT;
 	buf[4] = MAXIMUM_IR_BIT_TIME_TICK_COUNT;

 	if (mutex_lock_interruptible(&d->i2c_mutex) < 0)
 		return -EAGAIN;
 	ret = usb_control_msg(d->udev, usb_sndctrlpipe(d->udev, 0),
 			GET_IR_DATA_VENDOR_REQUEST,
 			USB_TYPE_VENDOR | USB_DIR_OUT,
 			0, 0,
 			buf, 5, 500);
 	if (ret < 0)
 		goto unlock;

 	buf[1] = 0;
 	buf[2] = 0;
 	ret = usb_control_msg(d->udev, usb_rcvctrlpipe(d->udev, 0),
 			GET_IR_DATA_VENDOR_REQUEST,
 			USB_TYPE_VENDOR | USB_DIR_IN,
 			0x8080, 0,
 			buf, sizeof(buf), 500);

 unlock:
 	mutex_unlock(&d->i2c_mutex);

 	if (ret < 0)
 		return ret;

 	if (ret == 1)
 		return 0; /* no key pressed */

 	/* decoding */
 	b = buf+1;

 #if 0
 	deb_rc("RC: %d ", ret);
 	debug_dump(b, ret, deb_rc);
 #endif

 	ev.pulse = 0;
 	while (1) {
 		ev.pulse = !ev.pulse;
 		ev.duration = (*b * FIRMWARE_CLOCK_DIVISOR * FIRMWARE_CLOCK_TICK) / 1000;
 		ir_raw_event_store(d->rc_dev, &ev);

 		b++;
 		if (*b == 0xff) {
 			ev.pulse = 0;
 			ev.duration = 888888*2;
 			ir_raw_event_store(d->rc_dev, &ev);
 			break;
 		}
 	}

 	ir_raw_event_handle(d->rc_dev);

 	return 1;
 }

 static int technisat_usb2_rc_query(struct dvb_usb_device *d)
 {
 	int ret = technisat_usb2_get_ir(d);

 	if (ret < 0)
 		return ret;

 	if (ret == 0)
 		return 0;

 	if (!disable_led_control)
 		technisat_usb2_set_led(d, 1, TECH_LED_BLINK);

 	return 0;
 }

 /* DVB-USB and USB stuff follows */
 static struct usb_device_id technisat_usb2_id_table[] = {
 	{ USB_DEVICE(USB_VID_TECHNISAT, USB_PID_TECHNISAT_USB2_DVB_S2) },
 	{ 0 }		/* Terminating entry */
 };
 MODULE_DEVICE_TABLE(usb, technisat_usb2_id_table);

 /* device description */
 static struct dvb_usb_device_properties technisat_usb2_devices = {
 	.caps              = DVB_USB_IS_AN_I2C_ADAPTER,

 	.usb_ctrl          = CYPRESS_FX2,

 	.identify_state    = technisat_usb2_identify_state,
 	.firmware          = "dvb-usb-SkyStar_USB_HD_FW_v17_63.HEX.fw",

 	.size_of_priv      = sizeof(struct technisat_usb2_state),

 	.i2c_algo          = &technisat_usb2_i2c_algo,

 	.power_ctrl        = technisat_usb2_power_ctrl,
 	.read_mac_address  = technisat_usb2_read_mac_address,

 	.num_adapters = 1,
 	.adapter = {
 		{
 		.num_frontends = 1,
 		.fe = {{
 			.frontend_attach  = technisat_usb2_frontend_attach,

 			.stream = {
 				.type = USB_ISOC,
 				.count = 8,
 				.endpoint = 0x2,
 				.u = {
 					.isoc = {
 						.framesperurb = 32,
 						.framesize = 2048,
 						.interval = 1,
 					}
 				}
 			},
 		}},
 			.size_of_priv = 0,
 		},
 	},

 	.num_device_descs = 1,
 	.devices = {
 		{   "Technisat SkyStar USB HD (DVB-S/S2)",
 			{ &technisat_usb2_id_table[0], NULL },
 			{ NULL },
 		},
 	},

 	.rc.core = {
 		.rc_interval = 100,
 		.rc_codes    = RC_MAP_TECHNISAT_USB2,
 		.module_name = "technisat-usb2",
 		.rc_query    = technisat_usb2_rc_query,
 		.allowed_protos = RC_BIT_ALL,
 		.driver_type    = RC_DRIVER_IR_RAW,
 	}
 };

 static int technisat_usb2_probe(struct usb_interface *intf,
 		const struct usb_device_id *id)
 {
 	struct dvb_usb_device *dev;

 	if (dvb_usb_device_init(intf, &technisat_usb2_devices, THIS_MODULE,
 				&dev, adapter_nr) != 0)
 		return -ENODEV;

 	if (dev) {
 		struct technisat_usb2_state *state = dev->priv;
 		state->dev = dev;

 		if (!disable_led_control) {
 			INIT_DELAYED_WORK(&state->green_led_work,
 					technisat_usb2_green_led_control);
 			schedule_delayed_work(&state->green_led_work,
 					msecs_to_jiffies(500));
 		}
 	}

 	return 0;
 }

 static void technisat_usb2_disconnect(struct usb_interface *intf)
 {
 	struct dvb_usb_device *dev = usb_get_intfdata(intf);

 	/* work and stuff was only created when the device is is hot-state */
 	if (dev != NULL) {
 		struct technisat_usb2_state *state = dev->priv;
 		if (state != NULL)
 			cancel_delayed_work_sync(&state->green_led_work);
 	}

 	dvb_usb_device_exit(intf);
 }

 static struct usb_driver technisat_usb2_driver = {
 	.name       = "dvb_usb_technisat_usb2",
 	.probe      = technisat_usb2_probe,
 	.disconnect = technisat_usb2_disconnect,
 	.id_table   = technisat_usb2_id_table,
 };

 module_usb_driver(technisat_usb2_driver);

 MODULE_AUTHOR("Patrick Boettcher <pboettcher@kernellabs.com>");
 MODULE_DESCRIPTION("Driver for Technisat DVB-S/S2 USB 2.0 device");
 MODULE_VERSION("1.0");
 MODULE_LICENSE("GPL");
	/*
	* Linux driver for Technisat DVB-S/S2 USB 2.0 device
	*
	* Copyright (C) 2010 Patrick Boettcher,
	* Kernel Labs Inc. PO Box 745, St James, NY 11780
	*
	* Development was sponsored by Technisat Digital UK Limited, whose
	* registered office is Witan Gate House 500 - 600 Witan Gate West,
	* Milton Keynes, MK9 1SH
	*
	* 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.
	*
	*
	* 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.
	*
	* THIS PROGRAM IS PROVIDED "AS IS" AND BOTH THE COPYRIGHT HOLDER AND
	* TECHNISAT DIGITAL UK LTD DISCLAIM ALL WARRANTIES WITH REGARD TO
	* THIS PROGRAM INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY OR
	* FITNESS FOR A PARTICULAR PURPOSE. NEITHER THE COPYRIGHT HOLDER
	* NOR TECHNISAT DIGITAL UK LIMITED SHALL BE LIABLE FOR ANY SPECIAL,
	* DIRECT, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER
	* RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
	* OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR
	* IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS PROGRAM. See the
	* GNU General Public License for more details.
	*/

	#define DVB_USB_LOG_PREFIX "technisat-usb2"
	#include "dvb-usb.h"

	#include "stv6110x.h"
	#include "stv090x.h"

	/* module parameters */
	DVB_DEFINE_MOD_OPT_ADAPTER_NR(adapter_nr);

	static int debug;
	module_param(debug, int, 0644);
	MODULE_PARM_DESC(debug,
	"set debugging level (bit-mask: 1=info,2=eeprom,4=i2c,8=rc)." \
	DVB_USB_DEBUG_STATUS);

	/* disables all LED control command and
	* also does not start the signal polling thread */
	static int disable_led_control;
	module_param(disable_led_control, int, 0444);
	MODULE_PARM_DESC(disable_led_control,
	"disable LED control of the device "
	"(default: 0 - LED control is active).");

	/* device private data */
	struct technisat_usb2_state {
	struct dvb_usb_device *dev;
	struct delayed_work green_led_work;
	u8 power_state;

	u16 last_scan_code;
	};

	/* debug print helpers */
	#define deb_info(args...) dprintk(debug, 0x01, args)
	#define deb_eeprom(args...) dprintk(debug, 0x02, args)
	#define deb_i2c(args...) dprintk(debug, 0x04, args)
	#define deb_rc(args...) dprintk(debug, 0x08, args)

	/* vendor requests */
	#define SET_IFCLK_TO_EXTERNAL_TSCLK_VENDOR_REQUEST 0xB3
	#define SET_FRONT_END_RESET_VENDOR_REQUEST 0xB4
	#define GET_VERSION_INFO_VENDOR_REQUEST 0xB5
	#define SET_GREEN_LED_VENDOR_REQUEST 0xB6
	#define SET_RED_LED_VENDOR_REQUEST 0xB7
	#define GET_IR_DATA_VENDOR_REQUEST 0xB8
	#define SET_LED_TIMER_DIVIDER_VENDOR_REQUEST 0xB9
	#define SET_USB_REENUMERATION 0xBA

	/* i2c-access methods */
	#define I2C_SPEED_100KHZ_BIT 0x40

	#define I2C_STATUS_NAK 7
	#define I2C_STATUS_OK 8

	static int technisat_usb2_i2c_access(struct usb_device *udev,
	u8 device_addr, u8 tx, u8 txlen, u8 rx, u8 rxlen)
	{
	u8 b[64];
	int ret, actual_length;

	deb_i2c("i2c-access: %02x, tx: ", device_addr);
	debug_dump(tx, txlen, deb_i2c);
	deb_i2c(" ");

	if (txlen > 62) {
	err("i2c TX buffer can't exceed 62 bytes (dev 0x%02x)",
	device_addr);
	txlen = 62;
	}
	if (rxlen > 62) {
	err("i2c RX buffer can't exceed 62 bytes (dev 0x%02x)",
	device_addr);
	rxlen = 62;
	}

	b[0] = I2C_SPEED_100KHZ_BIT;
	b[1] = device_addr << 1;

	if (rx != NULL) {
	b[0] \|= rxlen;
	b[1] \|= 1;
	}

	memcpy(&b[2], tx, txlen);
	ret = usb_bulk_msg(udev,
	usb_sndbulkpipe(udev, 0x01),
	b, 2 + txlen,
	NULL, 1000);

	if (ret < 0) {
	err("i2c-error: out failed %02x = %d", device_addr, ret);
	return -ENODEV;
	}

	ret = usb_bulk_msg(udev,
	usb_rcvbulkpipe(udev, 0x01),
	b, 64, &actual_length, 1000);
	if (ret < 0) {
	err("i2c-error: in failed %02x = %d", device_addr, ret);
	return -ENODEV;
	}

	if (b[0] != I2C_STATUS_OK) {
	err("i2c-error: %02x = %d", device_addr, b[0]);
	/* handle tuner-i2c-nak */
	if (!(b[0] == I2C_STATUS_NAK &&
	device_addr == 0x60
	/* && device_is_technisat_usb2 */))
	return -ENODEV;
	}

	deb_i2c("status: %d, ", b[0]);

	if (rx != NULL) {
	memcpy(rx, &b[2], rxlen);

	deb_i2c("rx (%d): ", rxlen);
	debug_dump(rx, rxlen, deb_i2c);
	}

	deb_i2c("\n");

	return 0;
	}

	static int technisat_usb2_i2c_xfer(struct i2c_adapter adap, struct i2c_msg msg,
	int num)
	{
	int ret = 0, i;
	struct dvb_usb_device *d = i2c_get_adapdata(adap);

	/* Ensure nobody else hits the i2c bus while we're sending our
	sequence of messages, (such as the remote control thread) */
	if (mutex_lock_interruptible(&d->i2c_mutex) < 0)
	return -EAGAIN;

	for (i = 0; i < num; i++) {
	if (i+1 < num && msg[i+1].flags & I2C_M_RD) {
	ret = technisat_usb2_i2c_access(d->udev, msg[i+1].addr,
	msg[i].buf, msg[i].len,
	msg[i+1].buf, msg[i+1].len);
	if (ret != 0)
	break;
	i++;
	} else {
	ret = technisat_usb2_i2c_access(d->udev, msg[i].addr,
	msg[i].buf, msg[i].len,
	NULL, 0);
	if (ret != 0)
	break;
	}
	}

	if (ret == 0)
	ret = i;

	mutex_unlock(&d->i2c_mutex);

	return ret;
	}

	static u32 technisat_usb2_i2c_func(struct i2c_adapter *adapter)
	{
	return I2C_FUNC_I2C;
	}

	static struct i2c_algorithm technisat_usb2_i2c_algo = {
	.master_xfer = technisat_usb2_i2c_xfer,
	.functionality = technisat_usb2_i2c_func,
	};

	#if 0
	static void technisat_usb2_frontend_reset(struct usb_device *udev)
	{
	usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
	SET_FRONT_END_RESET_VENDOR_REQUEST,
	USB_TYPE_VENDOR \| USB_DIR_OUT,
	10, 0,
	NULL, 0, 500);
	}
	#endif

	/* LED control */
	enum technisat_usb2_led_state {
	TECH_LED_OFF,
	TECH_LED_BLINK,
	TECH_LED_ON,
	TECH_LED_UNDEFINED
	};

	static int technisat_usb2_set_led(struct dvb_usb_device *d, int red, enum technisat_usb2_led_state state)
	{
	int ret;

	u8 led[8] = {
	red ? SET_RED_LED_VENDOR_REQUEST : SET_GREEN_LED_VENDOR_REQUEST,
	0
	};

	if (disable_led_control && state != TECH_LED_OFF)
	return 0;

	switch (state) {
	case TECH_LED_ON:
	led[1] = 0x82;
	break;
	case TECH_LED_BLINK:
	led[1] = 0x82;
	if (red) {
	led[2] = 0x02;
	led[3] = 10;
	led[4] = 10;
	} else {
	led[2] = 0xff;
	led[3] = 50;
	led[4] = 50;
	}
	led[5] = 1;
	break;

	default:
	case TECH_LED_OFF:
	led[1] = 0x80;
	break;
	}

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

	ret = usb_control_msg(d->udev, usb_sndctrlpipe(d->udev, 0),
	red ? SET_RED_LED_VENDOR_REQUEST : SET_GREEN_LED_VENDOR_REQUEST,
	USB_TYPE_VENDOR \| USB_DIR_OUT,
	0, 0,
	led, sizeof(led), 500);

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

	static int technisat_usb2_set_led_timer(struct dvb_usb_device *d, u8 red, u8 green)
	{
	int ret;
	u8 b = 0;

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

	ret = usb_control_msg(d->udev, usb_sndctrlpipe(d->udev, 0),
	SET_LED_TIMER_DIVIDER_VENDOR_REQUEST,
	USB_TYPE_VENDOR \| USB_DIR_OUT,
	(red << 8) \| green, 0,
	&b, 1, 500);

	mutex_unlock(&d->i2c_mutex);

	return ret;
	}

	static void technisat_usb2_green_led_control(struct work_struct *work)
	{
	struct technisat_usb2_state *state =
	container_of(work, struct technisat_usb2_state, green_led_work.work);
	struct dvb_frontend *fe = state->dev->adapter[0].fe_adap[0].fe;

	if (state->power_state == 0)
	goto schedule;

	if (fe != NULL) {
	enum fe_status status;

	if (fe->ops.read_status(fe, &status) != 0)
	goto schedule;

	if (status & FE_HAS_LOCK) {
	u32 ber;

	if (fe->ops.read_ber(fe, &ber) != 0)
	goto schedule;

	if (ber > 1000)
	technisat_usb2_set_led(state->dev, 0, TECH_LED_BLINK);
	else
	technisat_usb2_set_led(state->dev, 0, TECH_LED_ON);
	} else
	technisat_usb2_set_led(state->dev, 0, TECH_LED_OFF);
	}

	schedule:
	schedule_delayed_work(&state->green_led_work,
	msecs_to_jiffies(500));
	}

	/* method to find out whether the firmware has to be downloaded or not */
	static int technisat_usb2_identify_state(struct usb_device *udev,
	struct dvb_usb_device_properties *props,
	struct dvb_usb_device_description *desc, int cold)
	{
	int ret;
	u8 version[3];

	/* first select the interface */
	if (usb_set_interface(udev, 0, 1) != 0)
	err("could not set alternate setting to 0");
	else
	info("set alternate setting");

	cold = 0; / by default do not download a firmware - just in case something is wrong */

	ret = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
	GET_VERSION_INFO_VENDOR_REQUEST,
	USB_TYPE_VENDOR \| USB_DIR_IN,
	0, 0,
	version, sizeof(version), 500);

	if (ret < 0)
	*cold = 1;
	else {
	info("firmware version: %d.%d", version[1], version[2]);
	*cold = 0;
	}

	return 0;
	}

	/* power control */
	static int technisat_usb2_power_ctrl(struct dvb_usb_device *d, int level)
	{
	struct technisat_usb2_state *state = d->priv;

	state->power_state = level;

	if (disable_led_control)
	return 0;

	/* green led is turned off in any case - will be turned on when tuning */
	technisat_usb2_set_led(d, 0, TECH_LED_OFF);
	/* red led is turned on all the time */
	technisat_usb2_set_led(d, 1, TECH_LED_ON);
	return 0;
	}

	/* mac address reading - from the eeprom */
	#if 0
	static void technisat_usb2_eeprom_dump(struct dvb_usb_device *d)
	{
	u8 reg;
	u8 b[16];
	int i, j;

	/* full EEPROM dump */
	for (j = 0; j < 256 * 4; j += 16) {
	reg = j;
	if (technisat_usb2_i2c_access(d->udev, 0x50 + j / 256, &reg, 1, b, 16) != 0)
	break;

	deb_eeprom("EEPROM: %01x%02x: ", j / 256, reg);
	for (i = 0; i < 16; i++)
	deb_eeprom("%02x ", b[i]);
	deb_eeprom("\n");
	}
	}
	#endif

	static u8 technisat_usb2_calc_lrc(const u8 *b, u16 length)
	{
	u8 lrc = 0;
	while (--length)
	lrc ^= *b++;
	return lrc;
	}

	static int technisat_usb2_eeprom_lrc_read(struct dvb_usb_device *d,
	u16 offset, u8 *b, u16 length, u8 tries)
	{
	u8 bo = offset & 0xff;
	struct i2c_msg msg[] = {
	{
	.addr = 0x50 \| ((offset >> 8) & 0x3),
	.buf = &bo,
	.len = 1
	}, {
	.addr = 0x50 \| ((offset >> 8) & 0x3),
	.flags = I2C_M_RD,
	.buf = b,
	.len = length
	}
	};

	while (tries--) {
	int status;

	if (i2c_transfer(&d->i2c_adap, msg, 2) != 2)
	break;

	status =
	technisat_usb2_calc_lrc(b, length - 1) == b[length - 1];

	if (status)
	return 0;
	}

	return -EREMOTEIO;
	}

	#define EEPROM_MAC_START 0x3f8
	#define EEPROM_MAC_TOTAL 8
	static int technisat_usb2_read_mac_address(struct dvb_usb_device *d,
	u8 mac[])
	{
	u8 buf[EEPROM_MAC_TOTAL];

	if (technisat_usb2_eeprom_lrc_read(d, EEPROM_MAC_START,
	buf, EEPROM_MAC_TOTAL, 4) != 0)
	return -ENODEV;

	memcpy(mac, buf, 6);
	return 0;
	}

	/* frontend attach */
	static int technisat_usb2_set_voltage(struct dvb_frontend *fe,
	fe_sec_voltage_t voltage)
	{
	int i;
	u8 gpio[3] = { 0 }; /* 0 = 2, 1 = 3, 2 = 4 */

	gpio[2] = 1; /* high - voltage ? */

	switch (voltage) {
	case SEC_VOLTAGE_13:
	gpio[0] = 1;
	break;
	case SEC_VOLTAGE_18:
	gpio[0] = 1;
	gpio[1] = 1;
	break;
	default:
	case SEC_VOLTAGE_OFF:
	break;
	}

	for (i = 0; i < 3; i++)
	if (stv090x_set_gpio(fe, i+2, 0, gpio[i], 0) != 0)
	return -EREMOTEIO;
	return 0;
	}

	static struct stv090x_config technisat_usb2_stv090x_config = {
	.device = STV0903,
	.demod_mode = STV090x_SINGLE,
	.clk_mode = STV090x_CLK_EXT,

	.xtal = 8000000,
	.address = 0x68,

	.ts1_mode = STV090x_TSMODE_DVBCI,
	.ts1_clk = 13400000,
	.ts1_tei = 1,

	.repeater_level = STV090x_RPTLEVEL_64,

	.tuner_bbgain = 6,
	};

	static struct stv6110x_config technisat_usb2_stv6110x_config = {
	.addr = 0x60,
	.refclk = 16000000,
	.clk_div = 2,
	};

	static int technisat_usb2_frontend_attach(struct dvb_usb_adapter *a)
	{
	struct usb_device *udev = a->dev->udev;
	int ret;

	a->fe_adap[0].fe = dvb_attach(stv090x_attach, &technisat_usb2_stv090x_config,
	&a->dev->i2c_adap, STV090x_DEMODULATOR_0);

	if (a->fe_adap[0].fe) {
	struct stv6110x_devctl *ctl;

	ctl = dvb_attach(stv6110x_attach,
	a->fe_adap[0].fe,
	&technisat_usb2_stv6110x_config,
	&a->dev->i2c_adap);

	if (ctl) {
	technisat_usb2_stv090x_config.tuner_init = ctl->tuner_init;
	technisat_usb2_stv090x_config.tuner_sleep = ctl->tuner_sleep;
	technisat_usb2_stv090x_config.tuner_set_mode = ctl->tuner_set_mode;
	technisat_usb2_stv090x_config.tuner_set_frequency = ctl->tuner_set_frequency;
	technisat_usb2_stv090x_config.tuner_get_frequency = ctl->tuner_get_frequency;
	technisat_usb2_stv090x_config.tuner_set_bandwidth = ctl->tuner_set_bandwidth;
	technisat_usb2_stv090x_config.tuner_get_bandwidth = ctl->tuner_get_bandwidth;
	technisat_usb2_stv090x_config.tuner_set_bbgain = ctl->tuner_set_bbgain;
	technisat_usb2_stv090x_config.tuner_get_bbgain = ctl->tuner_get_bbgain;
	technisat_usb2_stv090x_config.tuner_set_refclk = ctl->tuner_set_refclk;
	technisat_usb2_stv090x_config.tuner_get_status = ctl->tuner_get_status;

	/* call the init function once to initialize
	tuner's clock output divider and demod's
	master clock */
	if (a->fe_adap[0].fe->ops.init)
	a->fe_adap[0].fe->ops.init(a->fe_adap[0].fe);

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

	ret = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
	SET_IFCLK_TO_EXTERNAL_TSCLK_VENDOR_REQUEST,
	USB_TYPE_VENDOR \| USB_DIR_OUT,
	0, 0,
	NULL, 0, 500);
	mutex_unlock(&a->dev->i2c_mutex);

	if (ret != 0)
	err("could not set IF_CLK to external");

	a->fe_adap[0].fe->ops.set_voltage = technisat_usb2_set_voltage;

	/* if everything was successful assign a nice name to the frontend */
	strlcpy(a->fe_adap[0].fe->ops.info.name, a->dev->desc->name,
	sizeof(a->fe_adap[0].fe->ops.info.name));
	} else {
	dvb_frontend_detach(a->fe_adap[0].fe);
	a->fe_adap[0].fe = NULL;
	}
	}

	technisat_usb2_set_led_timer(a->dev, 1, 1);

	return a->fe_adap[0].fe == NULL ? -ENODEV : 0;
	}

	/* Remote control */

	/* the device is giving providing raw IR-signals to the host mapping
	* it only to one remote control is just the default implementation
	*/
	#define NOMINAL_IR_BIT_TRANSITION_TIME_US 889
	#define NOMINAL_IR_BIT_TIME_US (2 * NOMINAL_IR_BIT_TRANSITION_TIME_US)

	#define FIRMWARE_CLOCK_TICK 83333
	#define FIRMWARE_CLOCK_DIVISOR 256

	#define IR_PERCENT_TOLERANCE 15

	#define NOMINAL_IR_BIT_TRANSITION_TICKS ((NOMINAL_IR_BIT_TRANSITION_TIME_US * 1000 * 1000) / FIRMWARE_CLOCK_TICK)
	#define NOMINAL_IR_BIT_TRANSITION_TICK_COUNT (NOMINAL_IR_BIT_TRANSITION_TICKS / FIRMWARE_CLOCK_DIVISOR)

	#define NOMINAL_IR_BIT_TIME_TICKS ((NOMINAL_IR_BIT_TIME_US * 1000 * 1000) / FIRMWARE_CLOCK_TICK)
	#define NOMINAL_IR_BIT_TIME_TICK_COUNT (NOMINAL_IR_BIT_TIME_TICKS / FIRMWARE_CLOCK_DIVISOR)

	#define MINIMUM_IR_BIT_TRANSITION_TICK_COUNT (NOMINAL_IR_BIT_TRANSITION_TICK_COUNT - ((NOMINAL_IR_BIT_TRANSITION_TICK_COUNT * IR_PERCENT_TOLERANCE) / 100))
	#define MAXIMUM_IR_BIT_TRANSITION_TICK_COUNT (NOMINAL_IR_BIT_TRANSITION_TICK_COUNT + ((NOMINAL_IR_BIT_TRANSITION_TICK_COUNT * IR_PERCENT_TOLERANCE) / 100))

	#define MINIMUM_IR_BIT_TIME_TICK_COUNT (NOMINAL_IR_BIT_TIME_TICK_COUNT - ((NOMINAL_IR_BIT_TIME_TICK_COUNT * IR_PERCENT_TOLERANCE) / 100))
	#define MAXIMUM_IR_BIT_TIME_TICK_COUNT (NOMINAL_IR_BIT_TIME_TICK_COUNT + ((NOMINAL_IR_BIT_TIME_TICK_COUNT * IR_PERCENT_TOLERANCE) / 100))

	static int technisat_usb2_get_ir(struct dvb_usb_device *d)
	{
	u8 buf[62], *b;
	int ret;
	struct ir_raw_event ev;

	buf[0] = GET_IR_DATA_VENDOR_REQUEST;
	buf[1] = 0x08;
	buf[2] = 0x8f;
	buf[3] = MINIMUM_IR_BIT_TRANSITION_TICK_COUNT;
	buf[4] = MAXIMUM_IR_BIT_TIME_TICK_COUNT;

	if (mutex_lock_interruptible(&d->i2c_mutex) < 0)
	return -EAGAIN;
	ret = usb_control_msg(d->udev, usb_sndctrlpipe(d->udev, 0),
	GET_IR_DATA_VENDOR_REQUEST,
	USB_TYPE_VENDOR \| USB_DIR_OUT,
	0, 0,
	buf, 5, 500);
	if (ret < 0)
	goto unlock;

	buf[1] = 0;
	buf[2] = 0;
	ret = usb_control_msg(d->udev, usb_rcvctrlpipe(d->udev, 0),
	GET_IR_DATA_VENDOR_REQUEST,
	USB_TYPE_VENDOR \| USB_DIR_IN,
	0x8080, 0,
	buf, sizeof(buf), 500);

	unlock:
	mutex_unlock(&d->i2c_mutex);

	if (ret < 0)
	return ret;

	if (ret == 1)
	return 0; /* no key pressed */

	/* decoding */
	b = buf+1;

	#if 0
	deb_rc("RC: %d ", ret);
	debug_dump(b, ret, deb_rc);
	#endif

	ev.pulse = 0;
	while (1) {
	ev.pulse = !ev.pulse;
	ev.duration = (b FIRMWARE_CLOCK_DIVISOR * FIRMWARE_CLOCK_TICK) / 1000;
	ir_raw_event_store(d->rc_dev, &ev);

	b++;
	if (*b == 0xff) {
	ev.pulse = 0;
	ev.duration = 888888*2;
	ir_raw_event_store(d->rc_dev, &ev);
	break;
	}
	}

	ir_raw_event_handle(d->rc_dev);

	return 1;
	}

	static int technisat_usb2_rc_query(struct dvb_usb_device *d)
	{
	int ret = technisat_usb2_get_ir(d);

	if (ret < 0)
	return ret;

	if (ret == 0)
	return 0;

	if (!disable_led_control)
	technisat_usb2_set_led(d, 1, TECH_LED_BLINK);

	return 0;
	}

	/* DVB-USB and USB stuff follows */
	static struct usb_device_id technisat_usb2_id_table[] = {
	{ USB_DEVICE(USB_VID_TECHNISAT, USB_PID_TECHNISAT_USB2_DVB_S2) },
	{ 0 } /* Terminating entry */
	};
	MODULE_DEVICE_TABLE(usb, technisat_usb2_id_table);

	/* device description */
	static struct dvb_usb_device_properties technisat_usb2_devices = {
	.caps = DVB_USB_IS_AN_I2C_ADAPTER,

	.usb_ctrl = CYPRESS_FX2,

	.identify_state = technisat_usb2_identify_state,
	.firmware = "dvb-usb-SkyStar_USB_HD_FW_v17_63.HEX.fw",

	.size_of_priv = sizeof(struct technisat_usb2_state),

	.i2c_algo = &technisat_usb2_i2c_algo,

	.power_ctrl = technisat_usb2_power_ctrl,
	.read_mac_address = technisat_usb2_read_mac_address,

	.num_adapters = 1,
	.adapter = {
	{
	.num_frontends = 1,
	.fe = {{
	.frontend_attach = technisat_usb2_frontend_attach,

	.stream = {
	.type = USB_ISOC,
	.count = 8,
	.endpoint = 0x2,
	.u = {
	.isoc = {
	.framesperurb = 32,
	.framesize = 2048,
	.interval = 1,
	}
	}
	},
	}},
	.size_of_priv = 0,
	},
	},

	.num_device_descs = 1,
	.devices = {
	{ "Technisat SkyStar USB HD (DVB-S/S2)",
	{ &technisat_usb2_id_table[0], NULL },
	{ NULL },
	},
	},

	.rc.core = {
	.rc_interval = 100,
	.rc_codes = RC_MAP_TECHNISAT_USB2,
	.module_name = "technisat-usb2",
	.rc_query = technisat_usb2_rc_query,
	.allowed_protos = RC_BIT_ALL,
	.driver_type = RC_DRIVER_IR_RAW,
	}
	};

	static int technisat_usb2_probe(struct usb_interface *intf,
	const struct usb_device_id *id)
	{
	struct dvb_usb_device *dev;

	if (dvb_usb_device_init(intf, &technisat_usb2_devices, THIS_MODULE,
	&dev, adapter_nr) != 0)
	return -ENODEV;

	if (dev) {
	struct technisat_usb2_state *state = dev->priv;
	state->dev = dev;

	if (!disable_led_control) {
	INIT_DELAYED_WORK(&state->green_led_work,
	technisat_usb2_green_led_control);
	schedule_delayed_work(&state->green_led_work,
	msecs_to_jiffies(500));
	}
	}

	return 0;
	}

	static void technisat_usb2_disconnect(struct usb_interface *intf)
	{
	struct dvb_usb_device *dev = usb_get_intfdata(intf);

	/* work and stuff was only created when the device is is hot-state */
	if (dev != NULL) {
	struct technisat_usb2_state *state = dev->priv;
	if (state != NULL)
	cancel_delayed_work_sync(&state->green_led_work);
	}

	dvb_usb_device_exit(intf);
	}

	static struct usb_driver technisat_usb2_driver = {
	.name = "dvb_usb_technisat_usb2",
	.probe = technisat_usb2_probe,
	.disconnect = technisat_usb2_disconnect,
	.id_table = technisat_usb2_id_table,
	};

	module_usb_driver(technisat_usb2_driver);

	MODULE_AUTHOR("Patrick Boettcher <pboettcher@kernellabs.com>");
	MODULE_DESCRIPTION("Driver for Technisat DVB-S/S2 USB 2.0 device");
	MODULE_VERSION("1.0");
	MODULE_LICENSE("GPL");