merge: http://linuxtv.org/hg/~mkrufky/megasky.dev

From: Mauro Carvalho Chehab <mchehab@infradead.org>



Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

8 files changed, 567 insertions, 1 deletions

diff --git a/linux/drivers/media/dvb/dvb-usb/Kconfig b/linux/drivers/media/dvb/dvb-usb/Kconfig
index 861a02939..80f67a51b 100644
--- a/linux/drivers/media/dvb/dvb-usb/Kconfig
+++ b/linux/drivers/media/dvb/dvb-usb/Kconfig
@@ -120,6 +120,23 @@ config DVB_USB_M920X
 	  "DTV USB MINI" (in cold state) are supported.
 	  Firmware required.
 
+config DVB_USB_GL861
+	tristate "Genesys Logic GL861 USB2.0 support"
+	depends on DVB_USB
+	select DVB_ZL10353 if !DVB_FE_CUSTOMISE
+	select DVB_TUNER_QT1010 if !DVB_FE_CUSTOMISE
+	help
+	  Say Y here to support the MSI Megasky 580 (55801) DVB-T USB2.0
+	  receiver with USB ID 0db0:5581.
+
+config DVB_USB_AU6610
+	tristate "Alcor Micro AU6610 USB2.0 support"
+	depends on DVB_USB
+	select DVB_ZL10353 if !DVB_FE_CUSTOMISE
+	select DVB_TUNER_QT1010 if !DVB_FE_CUSTOMISE
+	help
+	  Say Y here to support the Sigmatek DVB-110 DVB-T USB2.0 receiver.
+
 config DVB_USB_DIGITV
 	tristate "Nebula Electronics uDigiTV DVB-T USB2.0 support"
 	depends on DVB_USB
diff --git a/linux/drivers/media/dvb/dvb-usb/Makefile b/linux/drivers/media/dvb/dvb-usb/Makefile
index 815e27898..40f28f559 100644
--- a/linux/drivers/media/dvb/dvb-usb/Makefile
+++ b/linux/drivers/media/dvb/dvb-usb/Makefile
@@ -33,6 +33,12 @@ obj-$(CONFIG_DVB_USB_UMT_010) += dvb-usb-dibusb-common.o dvb-usb-umt-010.o
 dvb-usb-m920x-objs = m920x.o
 obj-$(CONFIG_DVB_USB_M920X) += dvb-usb-m920x.o
 
+dvb-usb-gl861-objs = gl861.o
+obj-$(CONFIG_DVB_USB_GL861) += dvb-usb-gl861.o
+
+dvb-usb-au6610-objs = au6610.o
+obj-$(CONFIG_DVB_USB_AU6610) += dvb-usb-au6610.o
+
 dvb-usb-digitv-objs = digitv.o
 obj-$(CONFIG_DVB_USB_DIGITV) += dvb-usb-digitv.o
 
diff --git a/linux/drivers/media/dvb/dvb-usb/au6610.c b/linux/drivers/media/dvb/dvb-usb/au6610.c
new file mode 100644
index 000000000..91079891d
--- /dev/null
+++ b/linux/drivers/media/dvb/dvb-usb/au6610.c
@@ -0,0 +1,258 @@
+/* DVB USB compliant linux driver for Sigmatek DVB-110 DVB-T USB2.0 receiver
+ *
+ * Copyright (C) 2006 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, version 2.
+ *
+ * see Documentation/dvb/README.dvb-usb for more information
+ */
+
+#include "au6610.h"
+
+#include "zl10353.h"
+#include "qt1010.h"
+
+/* debug */
+static int dvb_usb_au6610_debug;
+module_param_named(debug, dvb_usb_au6610_debug, int, 0644);
+MODULE_PARM_DESC(debug, "set debugging level (1=rc (or-able))." DVB_USB_DEBUG_STATUS);
+
+static int au6610_usb_msg(struct dvb_usb_device *d, u8 operation, u8 addr,
+			  u8 *wbuf, u16 wlen, u8 *rbuf, u16 rlen)
+{
+	int ret;
+	u16 index;
+	u8 usb_buf[6]; /* enough for all known requests,
+			  read returns 5 and write 6 bytes */
+	switch (wlen) {
+	case 1:
+		index = wbuf[0] << 8;
+		break;
+	case 2:
+		index = wbuf[0] << 8;
+		index += wbuf[1];
+		break;
+	default:
+		warn("wlen = %x, aborting.", wlen);
+		return -EINVAL;
+	}
+
+	ret = usb_control_msg(d->udev, usb_rcvctrlpipe(d->udev, 0), operation,
+			      USB_TYPE_VENDOR|USB_DIR_IN, addr, index, usb_buf,
+			      sizeof(usb_buf), AU6610_USB_TIMEOUT);
+
+	if (ret < 0)
+		return ret;
+
+	switch (operation) {
+	case AU6610_REQ_I2C_READ:
+	case AU6610_REQ_USB_READ:
+		/* requested value is always 5th byte in buffer */
+		rbuf[0] = usb_buf[4];
+	}
+
+	return ret;
+}
+
+static int au6610_i2c_msg(struct dvb_usb_device *d, u8 addr,
+			  u8 *wbuf, u16 wlen, u8 *rbuf, u16 rlen)
+{
+	u8 request;
+	u8 wo = (rbuf == NULL || rlen == 0); /* write-only */
+
+	if (wo) {
+		request = AU6610_REQ_I2C_WRITE;
+	} else { /* rw */
+		request = AU6610_REQ_I2C_READ;
+	}
+
+	return au6610_usb_msg(d, request, addr, wbuf, wlen, rbuf, rlen);
+}
+
+
+/* I2C */
+static int au6610_i2c_xfer(struct i2c_adapter *adap, struct i2c_msg msg[],
+			   int num)
+{
+	struct dvb_usb_device *d = i2c_get_adapdata(adap);
+	int i;
+
+	if (mutex_lock_interruptible(&d->i2c_mutex) < 0)
+		return -EAGAIN;
+
+	if (num > 2)
+		return -EINVAL;
+
+	for (i = 0; i < num; i++) {
+		/* write/read request */
+		if (i+1 < num && (msg[i+1].flags & I2C_M_RD)) {
+			if (au6610_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 (au6610_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 au6610_i2c_func(struct i2c_adapter *adapter)
+{
+	return I2C_FUNC_I2C;
+}
+
+static struct i2c_algorithm au6610_i2c_algo = {
+	.master_xfer   = au6610_i2c_xfer,
+	.functionality = au6610_i2c_func,
+};
+
+/* Callbacks for DVB USB */
+static int au6610_identify_state(struct usb_device *udev,
+				 struct dvb_usb_device_properties *props,
+				 struct dvb_usb_device_description **desc,
+				 int *cold)
+{
+	*cold = 0;
+	return 0;
+}
+
+static struct zl10353_config au6610_zl10353_config = {
+	.demod_address = 0x1e,
+	.no_tuner = 1,
+	.parallel_ts = 1,
+};
+
+static int au6610_zl10353_frontend_attach(struct dvb_usb_adapter *adap)
+{
+	if ((adap->fe = dvb_attach(zl10353_attach, &au6610_zl10353_config,
+				   &adap->dev->i2c_adap)) != NULL) {
+		return 0;
+	}
+
+	return -EIO;
+}
+
+static struct qt1010_config au6610_qt1010_config = {
+	.i2c_address = 0xc4
+};
+
+static int au6610_qt1010_tuner_attach(struct dvb_usb_adapter *adap)
+{
+	return dvb_attach(qt1010_attach,
+			  adap->fe, &adap->dev->i2c_adap,
+			  &au6610_qt1010_config) == NULL ? -ENODEV : 0;
+}
+
+/* DVB USB Driver stuff */
+static struct dvb_usb_device_properties au6610_properties;
+
+static int au6610_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 < AU6610_ALTSETTING_COUNT)
+		return -ENODEV;
+
+	if ((ret = dvb_usb_device_init(intf, &au6610_properties, THIS_MODULE, &d)) == 0) {
+		alt = usb_altnum_to_altsetting(intf, AU6610_ALTSETTING);
+
+		if (alt == NULL) {
+			deb_rc("no alt found!\n");
+			return -ENODEV;
+		}
+		ret = usb_set_interface(d->udev, alt->desc.bInterfaceNumber,
+					alt->desc.bAlternateSetting);
+	}
+
+	return ret;
+}
+
+
+static struct usb_device_id au6610_table [] = {
+	{ USB_DEVICE(USB_VID_ALCOR_MICRO, USB_PID_SIGMATEK_DVB_110) },
+	{ }		/* Terminating entry */
+};
+MODULE_DEVICE_TABLE (usb, au6610_table);
+
+static struct dvb_usb_device_properties au6610_properties = {
+	.caps = DVB_USB_IS_AN_I2C_ADAPTER,
+	.usb_ctrl = DEVICE_SPECIFIC,
+	.size_of_priv     = 0,
+	.identify_state   = au6610_identify_state,
+	.num_adapters = 1,
+	.adapter = {
+		{
+			.frontend_attach  = au6610_zl10353_frontend_attach,
+			.tuner_attach     = au6610_qt1010_tuner_attach,
+
+			.stream = {
+				.type = USB_ISOC,
+				.count = 5,
+				.endpoint = 0x82,
+				.u = {
+					.isoc = {
+						.framesperurb = 40,
+						.framesize = 942,   /* maximum packet size */
+						.interval = 1.25,   /* 125 us */
+					}
+				}
+			},
+		}
+	},
+	.i2c_algo = &au6610_i2c_algo,
+	.num_device_descs = 1,
+	.devices = {
+		{
+			"Sigmatek DVB-110 DVB-T USB2.0",
+			{ &au6610_table[0], NULL },
+			{ NULL },
+		},
+	}
+};
+
+static struct usb_driver au6610_driver = {
+#if LINUX_VERSION_CODE <=  KERNEL_VERSION(2,6,15)
+	.owner      = THIS_MODULE,
+#endif
+	.name       = "dvb_usb_au6610",
+	.probe      = au6610_probe,
+	.disconnect = dvb_usb_device_exit,
+	.id_table   = au6610_table,
+};
+
+/* module stuff */
+static int __init au6610_module_init(void)
+{
+	int ret;
+
+	if ((ret = usb_register(&au6610_driver))) {
+		err("usb_register failed. Error number %d", ret);
+		return ret;
+	}
+
+	return 0;
+}
+
+static void __exit au6610_module_exit(void)
+{
+	/* deregister this driver from the USB subsystem */
+	usb_deregister(&au6610_driver);
+}
+
+module_init (au6610_module_init);
+module_exit (au6610_module_exit);
+
+MODULE_AUTHOR("Antti Palosaari <crope@iki.fi>");
+MODULE_DESCRIPTION("Driver Sigmatek DVB-110 DVB-T USB2.0 / AU6610");
+MODULE_VERSION("0.1");
+MODULE_LICENSE("GPL");
diff --git a/linux/drivers/media/dvb/dvb-usb/au6610.h b/linux/drivers/media/dvb/dvb-usb/au6610.h
new file mode 100644
index 000000000..4161b054c
--- /dev/null
+++ b/linux/drivers/media/dvb/dvb-usb/au6610.h
@@ -0,0 +1,19 @@
+#ifndef _DVB_USB_AU6610_H_
+#define _DVB_USB_AU6610_H_
+
+#define DVB_USB_LOG_PREFIX "au6610"
+#include "dvb-usb.h"
+
+#define deb_rc(args...)   dprintk(dvb_usb_au6610_debug,0x01,args)
+
+#define AU6610_REQ_I2C_WRITE	0x14
+#define AU6610_REQ_I2C_READ	0x13
+#define AU6610_REQ_USB_WRITE	0x16
+#define AU6610_REQ_USB_READ	0x15
+
+#define AU6610_USB_TIMEOUT 1000
+
+#define AU6610_ALTSETTING_COUNT 6
+#define AU6610_ALTSETTING       5
+
+#endif
diff --git a/linux/drivers/media/dvb/dvb-usb/dvb-usb-ids.h b/linux/drivers/media/dvb/dvb-usb/dvb-usb-ids.h
index 713ec5a82..148386aba 100644
--- a/linux/drivers/media/dvb/dvb-usb/dvb-usb-ids.h
+++ b/linux/drivers/media/dvb/dvb-usb/dvb-usb-ids.h
@@ -11,6 +11,7 @@
 
 /* Vendor IDs */
 #define USB_VID_ADSTECH				0x06e1
+#define USB_VID_ALCOR_MICRO		0x058f
 #define USB_VID_ANCHOR				0x0547
 #define USB_VID_AVERMEDIA			0x07ca
 #define USB_VID_COMPRO				0x185b
@@ -121,6 +122,7 @@
 #define USB_PID_DIGITALNOW_BLUEBIRD_DUAL_1_WARM		0xdb55
 #define USB_PID_MEDION_MD95700				0x0932
 #define USB_PID_MSI_MEGASKY580				0x5580
+#define USB_PID_MSI_MEGASKY580_55801			0x5581
 #define USB_PID_KYE_DVB_T_COLD				0x701e
 #define USB_PID_KYE_DVB_T_WARM				0x701f
 #define USB_PID_PCTV_200E				0x020e
@@ -136,6 +138,7 @@
 #define USB_PID_WINFAST_DTV_DONGLE_STK7700P		0x6f00
 #define USB_PID_GENPIX_8PSK_COLD			0x0200
 #define USB_PID_GENPIX_8PSK_WARM			0x0201
+#define USB_PID_SIGMATEK_DVB_110			0x6610
 
 
 #endif
diff --git a/linux/drivers/media/dvb/dvb-usb/gl861.c b/linux/drivers/media/dvb/dvb-usb/gl861.c
new file mode 100644
index 000000000..30eb4586c
--- /dev/null
+++ b/linux/drivers/media/dvb/dvb-usb/gl861.c
@@ -0,0 +1,234 @@
+/* DVB USB compliant linux driver for GL861 USB2.0 devices.
+ *
+ *	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 "gl861.h"
+
+#include "zl10353.h"
+#include "qt1010.h"
+
+/* debug */
+int dvb_usb_gl861_debug;
+module_param_named(debug,dvb_usb_gl861_debug, int, 0644);
+MODULE_PARM_DESC(debug, "set debugging level (1=rc (or-able))." DVB_USB_DEBUG_STATUS);
+
+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;
+	int wo = (rbuf == NULL || rlen == 0); /* write-only */
+	u8 req, type;
+
+	if (wo) {
+		req = GL861_REQ_I2C_WRITE;
+		type = GL861_WRITE;
+	} else { /* rw */
+		req = GL861_REQ_I2C_READ;
+		type = GL861_READ;
+	}
+
+	switch (wlen) {
+	case 1:
+		index = wbuf[0];
+		break;
+	case 2:
+		index = wbuf[0];
+		value = value + wbuf[1];
+		break;
+	default:
+		warn("wlen = %x, aborting.", wlen);
+		return -EINVAL;
+	}
+
+	return usb_control_msg(d->udev, usb_rcvctrlpipe(d->udev, 0), 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 (mutex_lock_interruptible(&d->i2c_mutex) < 0)
+		return -EAGAIN;
+
+	if (num > 2)
+		return -EINVAL;
+
+	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 struct i2c_algorithm gl861_i2c_algo = {
+	.master_xfer   = gl861_i2c_xfer,
+	.functionality = gl861_i2c_func,
+};
+
+/* Callbacks for DVB USB */
+static int gl861_identify_state(struct usb_device *udev,
+				struct dvb_usb_device_properties *props,
+				struct dvb_usb_device_description **desc,
+				int *cold)
+{
+	*cold = 0;
+
+	return 0;
+}
+
+static struct zl10353_config gl861_zl10353_config = {
+	.demod_address = 0x1e,
+	.no_tuner = 1,
+	.parallel_ts = 1,
+};
+
+static int gl861_frontend_attach(struct dvb_usb_adapter *adap)
+{
+	if ((adap->fe = dvb_attach(zl10353_attach, &gl861_zl10353_config,
+				   &adap->dev->i2c_adap)) != NULL) {
+		return 0;
+	}
+
+	return -EIO;
+}
+
+static struct qt1010_config gl861_qt1010_config = {
+	.i2c_address = 0xc4
+};
+
+static int gl861_tuner_attach(struct dvb_usb_adapter *adap)
+{
+	return dvb_attach(qt1010_attach,
+			  adap->fe, &adap->dev->i2c_adap,
+			  &gl861_qt1010_config) == NULL ? -ENODEV : 0;
+}
+
+/* DVB USB Driver stuff */
+static struct dvb_usb_device_properties gl861_properties;
+
+static int gl861_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 < 2)
+		return -ENODEV;
+
+	if ((ret = dvb_usb_device_init(intf, &gl861_properties, THIS_MODULE, &d)) == 0) {
+		alt = usb_altnum_to_altsetting(intf, 0);
+
+		if (alt == NULL) {
+			deb_rc("not alt found!\n");
+			return -ENODEV;
+		}
+
+		ret = usb_set_interface(d->udev, alt->desc.bInterfaceNumber,
+					alt->desc.bAlternateSetting);
+	}
+
+	return ret;
+}
+
+static struct usb_device_id gl861_table [] = {
+		{ USB_DEVICE(USB_VID_MSI, USB_PID_MSI_MEGASKY580_55801) },
+		{ }		/* Terminating entry */
+};
+MODULE_DEVICE_TABLE (usb, gl861_table);
+
+static struct dvb_usb_device_properties gl861_properties = {
+	.caps = DVB_USB_IS_AN_I2C_ADAPTER,
+	.usb_ctrl = DEVICE_SPECIFIC,
+
+	.size_of_priv     = 0,
+
+	.identify_state   = gl861_identify_state,
+	.num_adapters = 1,
+	.adapter = {{
+
+		.frontend_attach  = gl861_frontend_attach,
+		.tuner_attach     = gl861_tuner_attach,
+
+		.stream = {
+			.type = USB_BULK,
+			.count = 7,
+			.endpoint = 0x81,
+			.u = {
+				.bulk = {
+					.buffersize = 512,
+				}
+			}
+		},
+	}},
+	.i2c_algo         = &gl861_i2c_algo,
+
+	.num_device_descs = 1,
+	.devices = {
+		{   "MSI Mega Sky 55801 DVB-T USB2.0",
+			{ &gl861_table[0], NULL },
+			{ NULL },
+		},
+	}
+};
+
+static struct usb_driver gl861_driver = {
+#if LINUX_VERSION_CODE <=  KERNEL_VERSION(2,6,15)
+	.owner		= THIS_MODULE,
+#endif
+	.name		= "dvb_usb_gl861",
+	.probe		= gl861_probe,
+	.disconnect	= dvb_usb_device_exit,
+	.id_table	= gl861_table,
+};
+
+/* module stuff */
+static int __init gl861_module_init(void)
+{
+	int ret;
+
+	if ((ret = usb_register(&gl861_driver))) {
+		err("usb_register failed. Error number %d", ret);
+		return ret;
+	}
+
+	return 0;
+}
+
+static void __exit gl861_module_exit(void)
+{
+	/* deregister this driver from the USB subsystem */
+	usb_deregister(&gl861_driver);
+}
+
+module_init (gl861_module_init);
+module_exit (gl861_module_exit);
+
+MODULE_AUTHOR("Carl Lundqvist <comabug@gmail.com>");
+MODULE_DESCRIPTION("Driver MSI Mega Sky 580 DVB-T USB2.0 / GL861");
+MODULE_VERSION("0.1");
+MODULE_LICENSE("GPL");
diff --git a/linux/drivers/media/dvb/dvb-usb/gl861.h b/linux/drivers/media/dvb/dvb-usb/gl861.h
new file mode 100644
index 000000000..72a51afd5
--- /dev/null
+++ b/linux/drivers/media/dvb/dvb-usb/gl861.h
@@ -0,0 +1,15 @@
+#ifndef _DVB_USB_GL861_H_
+#define _DVB_USB_GL861_H_
+
+#define DVB_USB_LOG_PREFIX "gl861"
+#include "dvb-usb.h"
+
+#define deb_rc(args...)   dprintk(dvb_usb_gl861_debug,0x01,args)
+
+#define GL861_WRITE		0x40
+#define GL861_READ		0xc0
+
+#define GL861_REQ_I2C_WRITE	0x01
+#define GL861_REQ_I2C_READ	0x02
+
+#endif
diff --git a/linux/drivers/media/dvb/frontends/qt1010.c b/linux/drivers/media/dvb/frontends/qt1010.c
index 60931f83f..db93776ce 100644
--- a/linux/drivers/media/dvb/frontends/qt1010.c
+++ b/linux/drivers/media/dvb/frontends/qt1010.c
@@ -149,6 +149,9 @@ static int qt1010_set_params(struct dvb_frontend *fe, struct dvb_frontend_parame
 	priv->bandwidth = (fe->ops.info.type == FE_OFDM) ? params->u.ofdm.bandwidth : 0;
 	priv->frequency = freq;
 
+	if (fe->ops.i2c_gate_ctrl)
+		fe->ops.i2c_gate_ctrl(fe, 1); /* open i2c_gate */
+
 	/* reg 05 base value */
 	if      (freq < 290000000) reg05 = 0x14; /* 290 MHz */
 	else if (freq < 610000000) reg05 = 0x34; /* 610 MHz */
@@ -242,6 +245,9 @@ static int qt1010_set_params(struct dvb_frontend *fe, struct dvb_frontend_parame
 	if (debug)
 		qt1010_dump_regs(priv);
 
+	if (fe->ops.i2c_gate_ctrl)
+		fe->ops.i2c_gate_ctrl(fe, 0); /* close i2c_gate */
+
 	return 0;
 }
 
@@ -277,7 +283,6 @@ static int qt1010_init_meas1(struct qt1010_priv *priv, u8 oper, u8 reg, u8 reg_i
 	return qt1010_writereg(priv, 0x1e, 0x00);
 }
 
-
 static u8 qt1010_init_meas2(struct qt1010_priv *priv, u8 reg_init_val, u8 *retval)
 {
 	u8 i, val;
@@ -347,6 +352,9 @@ static int qt1010_init(struct dvb_frontend *fe)
 		{ QT1010_WR, 0x08, 0x08 }
 	};
 
+	if (fe->ops.i2c_gate_ctrl)
+		fe->ops.i2c_gate_ctrl(fe, 1); /* open i2c_gate */
+
 	for (i = 0; i < sizeof(i2c_data) / sizeof(*i2c_data); i++) {
 		switch (i2c_data[i].oper) {
 		case QT1010_WR:
@@ -430,6 +438,9 @@ struct dvb_frontend * qt1010_attach(struct dvb_frontend *fe,
 	priv->cfg      = cfg;
 	priv->i2c      = i2c;
 
+	if (fe->ops.i2c_gate_ctrl)
+		fe->ops.i2c_gate_ctrl(fe, 1); /* open i2c_gate */
+
 #if 0
 	qt1010_dump_regs(priv);
 #endif
@@ -440,6 +451,9 @@ struct dvb_frontend * qt1010_attach(struct dvb_frontend *fe,
 		return NULL;
 	}
 
+	if (fe->ops.i2c_gate_ctrl)
+		fe->ops.i2c_gate_ctrl(fe, 0); /* close i2c_gate */
+
 	printk(KERN_INFO "Quantek QT1010 successfully identified.\n");
 	memcpy(&fe->ops.tuner_ops, &qt1010_tuner_ops, sizeof(struct dvb_tuner_ops));