V4L/DVB (10954): Add cx231xx USB driver

Signed-off-by: Srinivasa Deevi <srinivasa.deevi@conexant.com>
[mchehab@redhat.com: Remove the Kconfig changes, to avoid git breakages]
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

1 files changed, 935 insertions, 0 deletions

diff --git a/drivers/media/video/cx231xx/cx231xx-cards.c b/drivers/media/video/cx231xx/cx231xx-cards.c
new file mode 100644
index 000000000000..c567e5a9eec8
--- /dev/null
+++ b/drivers/media/video/cx231xx/cx231xx-cards.c
@@ -0,0 +1,935 @@
+/*
+   cx231xx-cards.c - driver for Conexant Cx23100/101/102 USB video capture devices
+
+   Copyright (C) 2008 <srinivasa.deevi at conexant dot com>
+        Based on em28xx driver
+
+   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 <linux/init.h>
+#include <linux/module.h>
+#include <linux/delay.h>
+#include <linux/i2c.h>
+#include <linux/usb.h>
+#include <media/tuner.h>
+#include <media/tveeprom.h>
+#include <media/v4l2-common.h>
+#include <media/v4l2-chip-ident.h>
+
+#include <media/cx25840.h>
+#include "xc5000.h"
+
+#include "cx231xx.h"
+
+static int tuner = -1;
+module_param(tuner, int, 0444);
+MODULE_PARM_DESC(tuner, "tuner type");
+
+static unsigned int disable_ir;
+module_param(disable_ir, int, 0444);
+MODULE_PARM_DESC(disable_ir, "disable infrared remote support");
+
+/* Bitmask marking allocated devices from 0 to CX231XX_MAXBOARDS */
+static unsigned long cx231xx_devused;
+
+/*
+ *  Reset sequences for analog/digital modes
+ */
+
+static struct cx231xx_reg_seq RDE250_XCV_TUNER[] = {
+    { 0x03, 0x01, 10 },
+    { 0x03, 0x00, 30 },
+    { 0x03, 0x01, 10 },
+    {   -1,   -1, -1 },
+};
+
+
+
+/*
+ *  Board definitions
+ */
+struct cx231xx_board cx231xx_boards[] = {
+
+	[CX231XX_BOARD_UNKNOWN] = {
+		.name          = "Unknown CX231xx video grabber",
+		.tuner_type    = TUNER_ABSENT,
+        .input        = { {
+			.type     = CX231XX_VMUX_TELEVISION,
+			.vmux     = CX231XX_VIN_3_1,
+			.amux     = CX231XX_AMUX_VIDEO,
+			.gpio     = 0,
+		}, {
+			.type     = CX231XX_VMUX_COMPOSITE1,
+			.vmux     = CX231XX_VIN_2_1,
+			.amux     = CX231XX_AMUX_LINE_IN,
+			.gpio     = 0,
+		}, {
+			.type     = CX231XX_VMUX_SVIDEO,
+			.vmux     = CX231XX_VIN_1_1 | (CX231XX_VIN_1_2 << 8 ) |
+					    CX25840_SVIDEO_ON,
+			.amux     = CX231XX_AMUX_LINE_IN,
+			.gpio     = 0,
+		} },
+	},
+
+	[CX231XX_BOARD_CNXT_RDE_250] = {
+		.name         = "Conexant Hybrid TV - RDE250",
+		.valid        = CX231XX_BOARD_VALIDATED,
+		.tuner_type   = TUNER_XC5000,
+        .tuner_addr   = 0x61,
+		.tuner_gpio   = RDE250_XCV_TUNER,
+        .tuner_sif_gpio = 0x05,
+		.tuner_scl_gpio = 0x1a,
+        .tuner_sda_gpio = 0x1b,
+        .decoder      = CX231XX_AVDECODER,
+        .demod_xfer_mode                = 0,
+        .ctl_pin_status_mask            = 0xFFFFFFC4,
+        .agc_analog_digital_select_gpio = 0x0c,
+        .gpio_pin_status_mask           = 0x4001000,
+        .tuner_i2c_master               = 1,
+        .demod_i2c_master               = 2,
+		.has_dvb      = 1,
+        .demod_addr   = 0x02,
+        .norm         = V4L2_STD_PAL,
+
+		.input        = { {
+			.type     = CX231XX_VMUX_TELEVISION,
+			.vmux     = CX231XX_VIN_3_1,
+			.amux     = CX231XX_AMUX_VIDEO,
+			.gpio     = 0,
+		}, {
+			.type     = CX231XX_VMUX_COMPOSITE1,
+			.vmux     = CX231XX_VIN_2_1,
+			.amux     = CX231XX_AMUX_LINE_IN,
+			.gpio     = 0,
+		}, {
+			.type     = CX231XX_VMUX_SVIDEO,
+			.vmux     = CX231XX_VIN_1_1 | (CX231XX_VIN_1_2 << 8 ) |
+					    CX25840_SVIDEO_ON,
+			.amux     = CX231XX_AMUX_LINE_IN,
+			.gpio     = 0,
+		} },
+	},
+
+    [CX231XX_BOARD_CNXT_RDU_250] = {
+		.name         = "Conexant Hybrid TV - RDU250",
+		.valid        = CX231XX_BOARD_VALIDATED,
+		.tuner_type   = TUNER_XC5000,
+        .tuner_addr   = 0x61,
+		.tuner_gpio   = RDE250_XCV_TUNER,
+        .tuner_sif_gpio = 0x05,
+		.tuner_scl_gpio = 0x1a,
+        .tuner_sda_gpio = 0x1b,
+        .decoder      = CX231XX_AVDECODER,
+        .demod_xfer_mode                = 0,
+        .ctl_pin_status_mask            = 0xFFFFFFC4,
+        .agc_analog_digital_select_gpio = 0x0c,
+        .gpio_pin_status_mask           = 0x4001000,
+        .tuner_i2c_master               = 1,
+        .demod_i2c_master               = 2,
+		.has_dvb      = 1,
+        .demod_addr   = 0x32,
+        .norm         = V4L2_STD_NTSC,
+
+		.input        = { {
+			.type     = CX231XX_VMUX_TELEVISION,
+			.vmux     = CX231XX_VIN_3_1,
+			.amux     = CX231XX_AMUX_VIDEO,
+			.gpio     = 0,
+		}, {
+			.type     = CX231XX_VMUX_COMPOSITE1,
+			.vmux     = CX231XX_VIN_2_1,
+			.amux     = CX231XX_AMUX_LINE_IN,
+			.gpio     = 0,
+		}, {
+			.type     = CX231XX_VMUX_SVIDEO,
+			.vmux     = CX231XX_VIN_1_1 | (CX231XX_VIN_1_2 << 8 ) |
+					    CX25840_SVIDEO_ON,
+			.amux     = CX231XX_AMUX_LINE_IN,
+			.gpio     = 0,
+		} },
+	},
+};
+const unsigned int cx231xx_bcount = ARRAY_SIZE(cx231xx_boards);
+
+/* table of devices that work with this driver */
+struct usb_device_id cx231xx_id_table [] = {
+	{ USB_DEVICE(0x0572, 0x58A0),
+			.driver_info = CX231XX_BOARD_UNKNOWN },
+	{ USB_DEVICE(0x0572, 0x58A2),
+			.driver_info = CX231XX_BOARD_CNXT_RDE_250 },
+    { USB_DEVICE(0x0572, 0x5A3C),
+			.driver_info = CX231XX_BOARD_CNXT_RDU_250 },
+	{ },
+};
+MODULE_DEVICE_TABLE(usb, cx231xx_id_table);
+
+/* cx231xx_tuner_callback
+ * will be used to reset XC5000 tuner using GPIO pin
+ */
+
+int cx231xx_tuner_callback(void *ptr, int component, int command, int arg)
+{
+	int rc = 0;
+	struct cx231xx *dev = ptr;
+
+    if (dev->tuner_type == TUNER_XC5000) {
+        if (command == XC5000_TUNER_RESET) {
+            cx231xx_info("Tuner Call back : RESET : command %d : tuner type %d \n",
+                command, dev->tuner_type);
+
+            cx231xx_set_gpio_value(dev, dev->board.tuner_gpio->bit,1);
+            msleep(10);
+            cx231xx_set_gpio_value(dev, dev->board.tuner_gpio->bit,0);
+            msleep(330);
+            cx231xx_set_gpio_value(dev, dev->board.tuner_gpio->bit,1);
+            msleep(10);
+        }
+    }
+	return rc;
+}
+EXPORT_SYMBOL_GPL(cx231xx_tuner_callback);
+
+static void inline cx231xx_set_model(struct cx231xx *dev)
+{
+	memcpy(&dev->board, &cx231xx_boards[dev->model], sizeof(dev->board));
+}
+
+/* Since cx231xx_pre_card_setup() requires a proper dev->model,
+ * this won't work for boards with generic PCI IDs
+ */
+void cx231xx_pre_card_setup(struct cx231xx *dev)
+{
+
+	cx231xx_set_model(dev);
+
+	cx231xx_info("Identified as %s (card=%d)\n",
+		    dev->board.name, dev->model);
+
+	/* Do card specific if any */
+	switch (dev->model) {
+        case CX231XX_BOARD_CNXT_RDE_250:
+            /* do card specific GPIO settings if required */
+            cx231xx_info("Precard: Board is Conexnat RDE 250\n");
+            /* set the direction for GPIO pins */
+            cx231xx_set_gpio_direction(dev, dev->board.tuner_gpio->bit,1);
+            cx231xx_set_gpio_value(dev, dev->board.tuner_gpio->bit,1);
+            cx231xx_set_gpio_direction(dev, dev->board.tuner_sif_gpio,1);
+            break;
+        case CX231XX_BOARD_CNXT_RDU_250:
+            /* do card specific GPIO settings if required */
+            cx231xx_info("Precard: Board is Conexnat RDU 250\n");
+            /* set the direction for GPIO pins */
+            cx231xx_set_gpio_direction(dev, dev->board.tuner_gpio->bit,1);
+            cx231xx_set_gpio_value(dev, dev->board.tuner_gpio->bit,1);
+            cx231xx_set_gpio_direction(dev, dev->board.tuner_sif_gpio,1);
+            break;
+	}
+
+	/* request some modules if any required */
+
+    /* reset the Tuner */
+	cx231xx_gpio_set(dev, dev->board.tuner_gpio);
+
+    /* set the mode to Analog mode initially */
+	cx231xx_set_mode(dev, CX231XX_ANALOG_MODE);
+
+	/* Unlock device */
+	/* cx231xx_set_mode(dev, CX231XX_SUSPEND); */
+
+}
+
+#if 0
+
+static void cx231xx_config_tuner(struct cx231xx *dev)
+{
+	struct tuner_setup           tun_setup;
+	struct v4l2_frequency        f;
+
+	if (dev->tuner_type == TUNER_ABSENT)
+		return;
+
+	tun_setup.mode_mask = T_ANALOG_TV | T_RADIO;
+	tun_setup.type = dev->tuner_type;
+	tun_setup.addr = dev->tuner_addr;
+	tun_setup.tuner_callback = cx231xx_tuner_callback;
+
+	cx231xx_i2c_call_clients(&dev->i2c_bus[1], TUNER_SET_TYPE_ADDR, &tun_setup);
+#if 0
+    if (tun_setup.type == TUNER_XC5000) {
+		static struct xc2028_ctrl ctrl = {
+			.fname = XC5000_DEFAULT_FIRMWARE,
+			.max_len = 64,
+            .demod = 0;
+		};
+		struct v4l2_priv_tun_config cfg = {
+			.tuner = dev->tuner_type,
+			.priv = &ctrl,
+		};
+		cx231xx_i2c_call_clients(&dev->i2c_bus[1], TUNER_SET_CONFIG, &cfg);
+	}
+#endif
+
+	/* configure tuner */
+	f.tuner = 0;
+	f.type = V4L2_TUNER_ANALOG_TV;
+	f.frequency = 9076;     /* just a magic number */
+	dev->ctl_freq = f.frequency;
+	cx231xx_i2c_call_clients(&dev->i2c_bus[1], VIDIOC_S_FREQUENCY, &f);
+}
+
+#endif
+
+/* ----------------------------------------------------------------------- */
+void cx231xx_set_ir(struct cx231xx *dev, struct IR_i2c *ir)
+{
+	if (disable_ir) {
+		ir->get_key = NULL;
+		return ;
+	}
+
+	/* detect & configure */
+	switch (dev->model) {
+
+        case CX231XX_BOARD_CNXT_RDE_250:
+            break;
+        case CX231XX_BOARD_CNXT_RDU_250:
+            break;
+        default:
+		    break;
+	}
+}
+
+void cx231xx_card_setup(struct cx231xx *dev)
+{
+	cx231xx_set_model(dev);
+
+	dev->tuner_type = cx231xx_boards[dev->model].tuner_type;
+	if (cx231xx_boards[dev->model].tuner_addr)
+		dev->tuner_addr = cx231xx_boards[dev->model].tuner_addr;
+
+    cx231xx_info(": tuner type %d, tuner address %d \n",
+        dev->tuner_type, dev->tuner_addr);
+
+	/* Do card specific if any */
+	switch (dev->model) {
+        case CX231XX_BOARD_CNXT_RDE_250:
+            /* do card specific GPIO settings if required */
+            cx231xx_info("Board is Conexnat RDE 250\n");
+            break;
+        case CX231XX_BOARD_CNXT_RDU_250:
+            /* do card specific GPIO settings if required */
+            cx231xx_info("Board is Conexnat RDU 250\n");
+            break;
+	}
+
+	if (dev->board.valid == CX231XX_BOARD_NOT_VALIDATED) {
+		cx231xx_errdev("\n\n");
+		cx231xx_errdev("The support for this board weren't "
+			      "valid yet.\n");
+		cx231xx_errdev("Please send a report of having this working\n");
+		cx231xx_errdev("not to V4L mailing list (and/or to other "
+				"addresses)\n\n");
+	}
+
+
+	/* request some modules */
+    if (dev->board.decoder == CX231XX_AVDECODER) {
+        cx231xx_info(": Requesting cx25840 module\n");
+		request_module("cx25840");
+    }
+#if 0
+    if (dev->board.tuner_type != TUNER_ABSENT) {
+        cx231xx_info(": Requesting Tuner module\n");
+		request_module("tuner");
+    }
+
+	cx231xx_config_tuner(dev);
+
+    /* TBD  IR will be added later */
+	cx231xx_ir_init(dev);
+#endif
+}
+
+
+
+/*
+ * cx231xx_config()
+ * inits registers with sane defaults
+ */
+int cx231xx_config(struct cx231xx *dev)
+{
+    /* TBD need to add cx231xx specific code */
+	dev->mute = 1;		/* maybe not the right place... */
+	dev->volume = 0x1f;
+
+	return 0;
+}
+
+/*
+ * cx231xx_config_i2c()
+ * configure i2c attached devices
+ */
+void cx231xx_config_i2c(struct cx231xx *dev)
+{
+	struct v4l2_routing route;
+
+	route.input = INPUT(dev->video_input)->vmux;
+	route.output = 0;
+
+	cx231xx_i2c_call_clients(&dev->i2c_bus[0], VIDIOC_STREAMON, NULL);
+}
+
+/*
+ * cx231xx_realease_resources()
+ * unregisters the v4l2,i2c and usb devices
+ * called when the device gets disconected or at module unload
+*/
+void cx231xx_release_resources(struct cx231xx *dev)
+{
+
+#if 0 /* TBD IR related  */
+	if (dev->ir)
+		cx231xx_ir_fini(dev);
+#endif
+
+	cx231xx_release_analog_resources(dev);
+
+    cx231xx_remove_from_devlist(dev);
+
+    cx231xx_dev_uninit(dev);
+
+	usb_put_dev(dev->udev);
+
+	/* Mark device as unused */
+	cx231xx_devused &= ~(1<<dev->devno);
+}
+
+
+/*
+ * cx231xx_init_dev()
+ * allocates and inits the device structs, registers i2c bus and v4l device
+ */
+static int cx231xx_init_dev(struct cx231xx **devhandle, struct usb_device *udev,
+			   int minor)
+{
+	struct cx231xx *dev = *devhandle;
+	int retval = -ENOMEM;
+	int errCode;
+	unsigned int maxh, maxw;
+
+	dev->udev = udev;
+	mutex_init(&dev->lock);
+	mutex_init(&dev->ctrl_urb_lock);
+    mutex_init(&dev->gpio_i2c_lock);
+
+    spin_lock_init(&dev->video_mode.slock);
+    spin_lock_init(&dev->vbi_mode.slock);
+    spin_lock_init(&dev->sliced_cc_mode.slock);
+
+	init_waitqueue_head(&dev->open);
+	init_waitqueue_head(&dev->wait_frame);
+	init_waitqueue_head(&dev->wait_stream);
+
+    dev->cx231xx_read_ctrl_reg = cx231xx_read_ctrl_reg;
+    dev->cx231xx_write_ctrl_reg = cx231xx_write_ctrl_reg;
+    dev->cx231xx_send_usb_command = cx231xx_send_usb_command;
+    dev->cx231xx_gpio_i2c_read = cx231xx_gpio_i2c_read;
+    dev->cx231xx_gpio_i2c_write = cx231xx_gpio_i2c_write;
+
+    /* Query cx231xx to find what pcb config it is related to */
+    initialize_cx231xx(dev);
+
+    /* Cx231xx pre card setup */
+	cx231xx_pre_card_setup(dev);
+
+	errCode = cx231xx_config(dev);
+	if (errCode) {
+		cx231xx_errdev("error configuring device\n");
+		return -ENOMEM;
+	}
+
+    /* set default norm */
+	dev->norm = dev->board.norm;
+
+	/* register i2c bus */
+	errCode = cx231xx_dev_init(dev);
+	if (errCode < 0) {
+		cx231xx_errdev("%s: cx231xx_i2c_register - errCode [%d]!\n",
+			__func__, errCode);
+		return errCode;
+	}
+
+	/* Do board specific init */
+	cx231xx_card_setup(dev);
+
+	/* configure the device */
+	cx231xx_config_i2c(dev);
+
+	maxw = norm_maxw(dev);
+	maxh = norm_maxh(dev);
+
+	/* set default image size */
+	dev->width = maxw;
+	dev->height = maxh;
+	dev->interlaced = 0;
+	dev->hscale = 0;
+	dev->vscale = 0;
+	dev->video_input = 0;
+
+	errCode = cx231xx_config(dev);
+	if (errCode < 0) {
+		cx231xx_errdev("%s: cx231xx_config - errCode [%d]!\n",
+			__func__, errCode);
+		return errCode;
+	}
+
+	/* init video dma queues */
+	INIT_LIST_HEAD(&dev->video_mode.vidq.active);
+	INIT_LIST_HEAD(&dev->video_mode.vidq.queued);
+
+    /* init vbi dma queues */
+	INIT_LIST_HEAD(&dev->vbi_mode.vidq.active);
+	INIT_LIST_HEAD(&dev->vbi_mode.vidq.queued);
+
+	/* Reset other chips required if they are tied up with GPIO pins */
+
+    cx231xx_add_into_devlist(dev);
+
+	retval = cx231xx_register_analog_devices(dev);
+	if (retval < 0) {
+		cx231xx_release_resources(dev);
+		goto fail_reg_devices;
+	}
+
+	cx231xx_init_extension(dev);
+
+	return 0;
+
+fail_reg_devices:
+	mutex_unlock(&dev->lock);
+	return retval;
+}
+
+#if defined(CONFIG_MODULES) && defined(MODULE)
+static void request_module_async(struct work_struct *work)
+{
+	struct cx231xx *dev = container_of(work,
+			     struct cx231xx, request_module_wk);
+
+
+	if (dev->has_alsa_audio)
+		request_module("cx231xx-alsa");
+
+	if (dev->board.has_dvb)
+		request_module("cx231xx-dvb");
+
+}
+
+static void request_modules(struct cx231xx *dev)
+{
+	INIT_WORK(&dev->request_module_wk, request_module_async);
+	schedule_work(&dev->request_module_wk);
+}
+#else
+#define request_modules(dev)
+#endif /* CONFIG_MODULES */
+
+
+
+/*
+ * cx231xx_usb_probe()
+ * checks for supported devices
+ */
+static int cx231xx_usb_probe(struct usb_interface *interface,
+			    const struct usb_device_id *id)
+{
+	struct usb_device *udev;
+	struct usb_interface *uif;
+	struct cx231xx *dev = NULL;
+	int retval = -ENODEV;
+    int nr, ifnum;
+	int i, isoc_pipe = 0;
+	char *speed;
+	char descr[255] = "";
+    struct usb_interface *lif = NULL;
+    int skip_interface = 0;
+    struct usb_interface_assoc_descriptor *assoc_desc;
+
+	udev = usb_get_dev(interface_to_usbdev(interface));
+	ifnum = interface->altsetting[0].desc.bInterfaceNumber;
+
+    cx231xx_info(": Interface Number %d\n", ifnum);
+
+    /* Interface number 0 - IR interface */
+    if(ifnum == 0 ){
+        /* Check to see next free device and mark as used */
+	    nr = find_first_zero_bit(&cx231xx_devused, CX231XX_MAXBOARDS);
+	    cx231xx_devused |= 1<<nr;
+
+        if (nr >= CX231XX_MAXBOARDS) {
+		    cx231xx_info(": Supports only %i cx231xx boards.\n",
+				    CX231XX_MAXBOARDS);
+		    cx231xx_devused &= ~(1<<nr);
+		    return -ENOMEM;
+	    }
+
+        /* allocate memory for our device state and initialize it */
+	    dev = kzalloc(sizeof(*dev), GFP_KERNEL);
+	    if (dev == NULL) {
+		    cx231xx_err(DRIVER_NAME ": out of memory!\n");
+		    cx231xx_devused &= ~(1<<nr);
+		    return -ENOMEM;
+	    }
+
+	    snprintf(dev->name, 29, "cx231xx #%d", nr);
+	    dev->devno = nr;
+	    dev->model = id->driver_info;
+	    dev->video_mode.alt   = -1;
+        dev->interface_count++;
+
+        /* reset gpio dir and value */
+        dev->gpio_dir = 0;
+        dev->gpio_val = 0;
+        dev->xc_fw_load_done = 0;
+		dev->has_alsa_audio = 1;
+        dev->power_mode = -1;
+
+        dev->vbi_or_sliced_cc_mode = 0; /* 0 - vbi ; 1 -sliced cc mode */
+
+        /* get maximum no.of IAD interfaces */
+        assoc_desc = udev->actconfig->intf_assoc[0];
+        dev->max_iad_interface_count  = assoc_desc->bInterfaceCount;
+        cx231xx_info(": Found IAD interface count %d\n", dev->max_iad_interface_count);
+
+        /* init CIR module TBD */
+
+        /* store the current interface */
+        lif = interface;
+
+    }
+    else if(ifnum == 1 ){
+
+        /* Get dev structure first */
+        dev = usb_get_intfdata(udev->actconfig->interface[0]);
+        if(dev == NULL){
+		    cx231xx_err(DRIVER_NAME ": out of first interface!\n");
+		    return -ENODEV;
+	    }
+
+        /* store the interface 0 back */
+        lif = udev->actconfig->interface[0];
+
+        /* increment interface count */
+        dev->interface_count++;
+
+        /* get device number */
+        nr = dev->devno;
+
+        assoc_desc = udev->actconfig->intf_assoc[0];
+        if(assoc_desc->bFirstInterface == ifnum){
+            cx231xx_info(": Found IAD interface match: AV Descriptor Start!! \n");
+        } else {
+            cx231xx_err(DRIVER_NAME " Not found matching interface\n");
+            return -ENODEV;
+        }
+
+    }
+    else if(ifnum >= 2) {
+        /* Get dev structure first */
+        dev = usb_get_intfdata(udev->actconfig->interface[0]);
+        if(dev == NULL){
+		    cx231xx_err(DRIVER_NAME ": out of first interface!\n");
+		    return -ENODEV;
+	    }
+
+        /* store the interface 0 back */
+        lif = udev->actconfig->interface[0];
+
+        /* increment interface count */
+        dev->interface_count++;
+
+        /* get device number */
+        nr = dev->devno;
+
+        /* set skip interface */
+        if((dev->interface_count -1) != dev->max_iad_interface_count )
+            skip_interface = 1; /* set skipping */
+        else{
+            cx231xx_info(": Found IAD interface number match with AV Device number!! \n");
+        }
+    }
+
+	switch (udev->speed) {
+	case USB_SPEED_LOW:
+		speed = "1.5";
+		break;
+	case USB_SPEED_UNKNOWN:
+	case USB_SPEED_FULL:
+		speed = "12";
+		break;
+	case USB_SPEED_HIGH:
+		speed = "480";
+		break;
+	default:
+		speed = "unknown";
+	}
+
+	if (udev->manufacturer)
+		strlcpy(descr, udev->manufacturer, sizeof(descr));
+
+	if (udev->product) {
+		if (*descr)
+			strlcat(descr, " ", sizeof(descr));
+		strlcat(descr, udev->product, sizeof(descr));
+	}
+	if (*descr)
+		strlcat(descr, " ", sizeof(descr));
+
+	cx231xx_info("New device %s@ %s Mbps "
+		"(%04x:%04x, interface %d, class %d)\n",
+		descr,
+		speed,
+		le16_to_cpu(udev->descriptor.idVendor),
+		le16_to_cpu(udev->descriptor.idProduct),
+		ifnum,
+		interface->altsetting->desc.bInterfaceNumber);
+
+    /* AV device initialization */
+    if((dev->interface_count -1) == dev->max_iad_interface_count ) {
+        cx231xx_info(" Calling init_dev\n");
+	    /* allocate device struct */
+	    retval = cx231xx_init_dev(&dev, udev, nr);
+	    if (retval) {
+		    cx231xx_devused &= ~(1<<dev->devno);
+		    kfree(dev);
+
+		    return retval;
+	    }
+
+        /* compute alternate max packet sizes for video */
+        uif = udev->actconfig->interface[dev->current_pcb_config.hs_config_info[0].interface_info.video_index+1];
+
+        dev->video_mode.end_point_addr = le16_to_cpu(uif->altsetting[0].endpoint[isoc_pipe].desc.bEndpointAddress);
+
+        dev->video_mode.num_alt = uif->num_altsetting;
+        cx231xx_info(": EndPoint Addr 0x%x, Alternate settings: %i\n", dev->video_mode.end_point_addr,
+                                    dev->video_mode.num_alt);
+        dev->video_mode.alt_max_pkt_size = kmalloc(32 * dev->video_mode.num_alt, GFP_KERNEL);
+
+        if (dev->video_mode.alt_max_pkt_size == NULL) {
+	        cx231xx_errdev("out of memory!\n");
+	        cx231xx_devused &= ~(1<<nr);
+	        kfree(dev);
+	        return -ENOMEM;
+        }
+
+        for (i = 0; i < dev->video_mode.num_alt ; i++) {
+	        u16 tmp = le16_to_cpu(uif->altsetting[i].endpoint[isoc_pipe].desc.
+						        wMaxPacketSize);
+	        dev->video_mode.alt_max_pkt_size[i] =
+	            (tmp & 0x07ff) * (((tmp & 0x1800) >> 11) + 1);
+            cx231xx_info("Alternate setting %i, max size= %i\n", i,
+					        dev->video_mode.alt_max_pkt_size[i]);
+        }
+
+
+        /* compute alternate max packet sizes for vbi */
+        uif = udev->actconfig->interface[dev->current_pcb_config.hs_config_info[0].interface_info.vanc_index+1];
+
+        dev->vbi_mode.end_point_addr =
+            le16_to_cpu(uif->altsetting[0].endpoint[isoc_pipe].desc.bEndpointAddress);
+
+        dev->vbi_mode.num_alt = uif->num_altsetting;
+        cx231xx_info(": EndPoint Addr 0x%x, Alternate settings: %i\n", dev->vbi_mode.end_point_addr,
+                                    dev->vbi_mode.num_alt);
+        dev->vbi_mode.alt_max_pkt_size = kmalloc(32 * dev->vbi_mode.num_alt, GFP_KERNEL);
+
+        if (dev->vbi_mode.alt_max_pkt_size == NULL) {
+	        cx231xx_errdev("out of memory!\n");
+	        cx231xx_devused &= ~(1<<nr);
+	        kfree(dev);
+	        return -ENOMEM;
+        }
+
+        for (i = 0; i < dev->vbi_mode.num_alt ; i++) {
+	        u16 tmp = le16_to_cpu(uif->altsetting[i].endpoint[isoc_pipe].desc.
+						        wMaxPacketSize);
+	        dev->vbi_mode.alt_max_pkt_size[i] =
+	            (tmp & 0x07ff) * (((tmp & 0x1800) >> 11) + 1);
+            cx231xx_info("Alternate setting %i, max size= %i\n", i,
+					        dev->vbi_mode.alt_max_pkt_size[i]);
+        }
+
+        /* compute alternate max packet sizes for sliced CC */
+        uif = udev->actconfig->interface[dev->current_pcb_config.hs_config_info[0].interface_info.hanc_index+1];
+
+        dev->sliced_cc_mode.end_point_addr =
+            le16_to_cpu(uif->altsetting[0].endpoint[isoc_pipe].desc.bEndpointAddress);
+
+        dev->sliced_cc_mode.num_alt = uif->num_altsetting;
+        cx231xx_info(": EndPoint Addr 0x%x, Alternate settings: %i\n", dev->sliced_cc_mode.end_point_addr,
+                                    dev->sliced_cc_mode.num_alt);
+        dev->sliced_cc_mode.alt_max_pkt_size = kmalloc(32 * dev->sliced_cc_mode.num_alt, GFP_KERNEL);
+
+        if (dev->sliced_cc_mode.alt_max_pkt_size == NULL) {
+	        cx231xx_errdev("out of memory!\n");
+	        cx231xx_devused &= ~(1<<nr);
+	        kfree(dev);
+	        return -ENOMEM;
+        }
+
+        for (i = 0; i < dev->sliced_cc_mode.num_alt ; i++) {
+	        u16 tmp = le16_to_cpu(uif->altsetting[i].endpoint[isoc_pipe].desc.
+						        wMaxPacketSize);
+	        dev->sliced_cc_mode.alt_max_pkt_size[i] =
+	            (tmp & 0x07ff) * (((tmp & 0x1800) >> 11) + 1);
+            cx231xx_info("Alternate setting %i, max size= %i\n", i,
+					        dev->sliced_cc_mode.alt_max_pkt_size[i]);
+        }
+
+        if(dev->current_pcb_config.ts1_source != 0xff ) {
+
+            /* compute alternate max packet sizes for TS1 */
+            uif = udev->actconfig->interface[dev->current_pcb_config.hs_config_info[0].interface_info.ts1_index+1];
+
+            dev->ts1_mode.end_point_addr =
+                le16_to_cpu(uif->altsetting[0].endpoint[isoc_pipe].desc.bEndpointAddress);
+
+            dev->ts1_mode.num_alt = uif->num_altsetting;
+            cx231xx_info(": EndPoint Addr 0x%x, Alternate settings: %i\n", dev->ts1_mode.end_point_addr,
+                                        dev->ts1_mode.num_alt);
+            dev->ts1_mode.alt_max_pkt_size = kmalloc(32 * dev->ts1_mode.num_alt, GFP_KERNEL);
+
+            if (dev->ts1_mode.alt_max_pkt_size == NULL) {
+	            cx231xx_errdev("out of memory!\n");
+	            cx231xx_devused &= ~(1<<nr);
+	            kfree(dev);
+	            return -ENOMEM;
+            }
+
+            for (i = 0; i < dev->ts1_mode.num_alt ; i++) {
+	            u16 tmp = le16_to_cpu(uif->altsetting[i].endpoint[isoc_pipe].desc.
+						            wMaxPacketSize);
+	            dev->ts1_mode.alt_max_pkt_size[i] =
+	                (tmp & 0x07ff) * (((tmp & 0x1800) >> 11) + 1);
+                cx231xx_info("Alternate setting %i, max size= %i\n", i,
+					            dev->ts1_mode.alt_max_pkt_size[i]);
+            }
+        }
+
+    }
+
+	/* save our data pointer in this interface device */
+	usb_set_intfdata(lif, dev);
+
+    /* load other modules required */
+    if((dev->interface_count -1) == dev->max_iad_interface_count )
+    {
+        cx231xx_info("Calling request modules\n");
+        request_modules(dev);
+    }
+
+    if(skip_interface ) {
+        cx231xx_info("Skipping the interface\n");
+        return -ENODEV;
+    }
+
+	return 0;
+}
+
+/*
+ * cx231xx_usb_disconnect()
+ * called when the device gets diconencted
+ * video device will be unregistered on v4l2_close in case it is still open
+ */
+static void cx231xx_usb_disconnect(struct usb_interface *interface)
+{
+	struct cx231xx *dev;
+
+    dev = usb_get_intfdata(interface);
+	usb_set_intfdata(interface, NULL);
+
+	if (!dev)
+		return;
+
+	/* wait until all current v4l2 io is finished then deallocate
+	   resources */
+	mutex_lock(&dev->lock);
+
+	wake_up_interruptible_all(&dev->open);
+
+	if (dev->users) {
+		cx231xx_warn
+		    ("device /dev/video%d is open! Deregistration and memory "
+		     "deallocation are deferred on close.\n",
+				dev->vdev->num);
+
+		dev->state |= DEV_MISCONFIGURED;
+		cx231xx_uninit_isoc(dev);
+		dev->state |= DEV_DISCONNECTED;
+		wake_up_interruptible(&dev->wait_frame);
+		wake_up_interruptible(&dev->wait_stream);
+	} else {
+		dev->state |= DEV_DISCONNECTED;
+		cx231xx_release_resources(dev);
+	}
+
+    cx231xx_close_extension(dev);
+
+	mutex_unlock(&dev->lock);
+
+	if (!dev->users) {
+		kfree(dev->video_mode.alt_max_pkt_size);
+        kfree(dev->vbi_mode.alt_max_pkt_size);
+        kfree(dev->sliced_cc_mode.alt_max_pkt_size);
+        kfree(dev->ts1_mode.alt_max_pkt_size);
+		kfree(dev);
+	}
+}
+
+static struct usb_driver cx231xx_usb_driver = {
+	.name = "cx231xx",
+	.probe = cx231xx_usb_probe,
+	.disconnect = cx231xx_usb_disconnect,
+	.id_table = cx231xx_id_table,
+};
+
+static int __init cx231xx_module_init(void)
+{
+	int result;
+
+	printk(KERN_INFO DRIVER_NAME " v4l2 driver version %d.%d.%d loaded\n",
+	       (CX231XX_VERSION_CODE >> 16) & 0xff,
+	       (CX231XX_VERSION_CODE >> 8) & 0xff, CX231XX_VERSION_CODE & 0xff);
+
+	/* register this driver with the USB subsystem */
+	result = usb_register(&cx231xx_usb_driver);
+	if (result)
+		cx231xx_err(DRIVER_NAME
+			   " usb_register failed. Error number %d.\n", result);
+
+	return result;
+}
+
+static void __exit cx231xx_module_exit(void)
+{
+	/* deregister this driver with the USB subsystem */
+	usb_deregister(&cx231xx_usb_driver);
+}
+
+module_init(cx231xx_module_init);
+module_exit(cx231xx_module_exit);