1 files changed, 766 insertions, 0 deletions

diff --git a/kernel/drivers/media/usb/go7007/go7007-driver.c b/kernel/drivers/media/usb/go7007/go7007-driver.c
new file mode 100644
index 000000000..95cffb771
--- /dev/null
+++ b/kernel/drivers/media/usb/go7007/go7007-driver.c
@@ -0,0 +1,766 @@
+/*
+ * Copyright (C) 2005-2006 Micronas USA Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License (Version 2) as
+ * published by the Free Software Foundation.
+ *
+ * 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.
+ */
+
+#include <linux/module.h>
+#include <linux/delay.h>
+#include <linux/sched.h>
+#include <linux/spinlock.h>
+#include <linux/unistd.h>
+#include <linux/time.h>
+#include <linux/mm.h>
+#include <linux/vmalloc.h>
+#include <linux/device.h>
+#include <linux/i2c.h>
+#include <linux/firmware.h>
+#include <linux/mutex.h>
+#include <linux/uaccess.h>
+#include <linux/slab.h>
+#include <linux/videodev2.h>
+#include <media/tuner.h>
+#include <media/v4l2-common.h>
+#include <media/v4l2-event.h>
+
+#include "go7007-priv.h"
+
+/*
+ * Wait for an interrupt to be delivered from the GO7007SB and return
+ * the associated value and data.
+ *
+ * Must be called with the hw_lock held.
+ */
+int go7007_read_interrupt(struct go7007 *go, u16 *value, u16 *data)
+{
+	go->interrupt_available = 0;
+	go->hpi_ops->read_interrupt(go);
+	if (wait_event_timeout(go->interrupt_waitq,
+				go->interrupt_available, 5*HZ) < 0) {
+		v4l2_err(&go->v4l2_dev, "timeout waiting for read interrupt\n");
+		return -1;
+	}
+	if (!go->interrupt_available)
+		return -1;
+	go->interrupt_available = 0;
+	*value = go->interrupt_value & 0xfffe;
+	*data = go->interrupt_data;
+	return 0;
+}
+EXPORT_SYMBOL(go7007_read_interrupt);
+
+/*
+ * Read a register/address on the GO7007SB.
+ *
+ * Must be called with the hw_lock held.
+ */
+int go7007_read_addr(struct go7007 *go, u16 addr, u16 *data)
+{
+	int count = 100;
+	u16 value;
+
+	if (go7007_write_interrupt(go, 0x0010, addr) < 0)
+		return -EIO;
+	while (count-- > 0) {
+		if (go7007_read_interrupt(go, &value, data) == 0 &&
+				value == 0xa000)
+			return 0;
+	}
+	return -EIO;
+}
+EXPORT_SYMBOL(go7007_read_addr);
+
+/*
+ * Send the boot firmware to the encoder, which just wakes it up and lets
+ * us talk to the GPIO pins and on-board I2C adapter.
+ *
+ * Must be called with the hw_lock held.
+ */
+static int go7007_load_encoder(struct go7007 *go)
+{
+	const struct firmware *fw_entry;
+	char fw_name[] = "go7007/go7007fw.bin";
+	void *bounce;
+	int fw_len, rv = 0;
+	u16 intr_val, intr_data;
+
+	if (go->boot_fw == NULL) {
+		if (request_firmware(&fw_entry, fw_name, go->dev)) {
+			v4l2_err(go, "unable to load firmware from file \"%s\"\n", fw_name);
+			return -1;
+		}
+		if (fw_entry->size < 16 || memcmp(fw_entry->data, "WISGO7007FW", 11)) {
+			v4l2_err(go, "file \"%s\" does not appear to be go7007 firmware\n", fw_name);
+			release_firmware(fw_entry);
+			return -1;
+		}
+		fw_len = fw_entry->size - 16;
+		bounce = kmemdup(fw_entry->data + 16, fw_len, GFP_KERNEL);
+		if (bounce == NULL) {
+			v4l2_err(go, "unable to allocate %d bytes for firmware transfer\n", fw_len);
+			release_firmware(fw_entry);
+			return -1;
+		}
+		release_firmware(fw_entry);
+		go->boot_fw_len = fw_len;
+		go->boot_fw = bounce;
+	}
+	if (go7007_interface_reset(go) < 0 ||
+	    go7007_send_firmware(go, go->boot_fw, go->boot_fw_len) < 0 ||
+	    go7007_read_interrupt(go, &intr_val, &intr_data) < 0 ||
+			(intr_val & ~0x1) != 0x5a5a) {
+		v4l2_err(go, "error transferring firmware\n");
+		rv = -1;
+	}
+	return rv;
+}
+
+MODULE_FIRMWARE("go7007/go7007fw.bin");
+
+/*
+ * Boot the encoder and register the I2C adapter if requested.  Do the
+ * minimum initialization necessary, since the board-specific code may
+ * still need to probe the board ID.
+ *
+ * Must NOT be called with the hw_lock held.
+ */
+int go7007_boot_encoder(struct go7007 *go, int init_i2c)
+{
+	int ret;
+
+	mutex_lock(&go->hw_lock);
+	ret = go7007_load_encoder(go);
+	mutex_unlock(&go->hw_lock);
+	if (ret < 0)
+		return -1;
+	if (!init_i2c)
+		return 0;
+	if (go7007_i2c_init(go) < 0)
+		return -1;
+	go->i2c_adapter_online = 1;
+	return 0;
+}
+EXPORT_SYMBOL(go7007_boot_encoder);
+
+/*
+ * Configure any hardware-related registers in the GO7007, such as GPIO
+ * pins and bus parameters, which are board-specific.  This assumes
+ * the boot firmware has already been downloaded.
+ *
+ * Must be called with the hw_lock held.
+ */
+static int go7007_init_encoder(struct go7007 *go)
+{
+	if (go->board_info->audio_flags & GO7007_AUDIO_I2S_MASTER) {
+		go7007_write_addr(go, 0x1000, 0x0811);
+		go7007_write_addr(go, 0x1000, 0x0c11);
+	}
+	switch (go->board_id) {
+	case GO7007_BOARDID_MATRIX_REV:
+		/* Set GPIO pin 0 to be an output (audio clock control) */
+		go7007_write_addr(go, 0x3c82, 0x0001);
+		go7007_write_addr(go, 0x3c80, 0x00fe);
+		break;
+	case GO7007_BOARDID_ADLINK_MPG24:
+		/* set GPIO5 to be an output, currently low */
+		go7007_write_addr(go, 0x3c82, 0x0000);
+		go7007_write_addr(go, 0x3c80, 0x00df);
+		break;
+	case GO7007_BOARDID_ADS_USBAV_709:
+		/* GPIO pin 0: audio clock control */
+		/*      pin 2: TW9906 reset */
+		/*      pin 3: capture LED */
+		go7007_write_addr(go, 0x3c82, 0x000d);
+		go7007_write_addr(go, 0x3c80, 0x00f2);
+		break;
+	}
+	return 0;
+}
+
+/*
+ * Send the boot firmware to the GO7007 and configure the registers.  This
+ * is the only way to stop the encoder once it has started streaming video.
+ *
+ * Must be called with the hw_lock held.
+ */
+int go7007_reset_encoder(struct go7007 *go)
+{
+	if (go7007_load_encoder(go) < 0)
+		return -1;
+	return go7007_init_encoder(go);
+}
+
+/*
+ * Attempt to instantiate an I2C client by ID, probably loading a module.
+ */
+static int init_i2c_module(struct i2c_adapter *adapter, const struct go_i2c *const i2c)
+{
+	struct go7007 *go = i2c_get_adapdata(adapter);
+	struct v4l2_device *v4l2_dev = &go->v4l2_dev;
+	struct v4l2_subdev *sd;
+	struct i2c_board_info info;
+
+	memset(&info, 0, sizeof(info));
+	strlcpy(info.type, i2c->type, sizeof(info.type));
+	info.addr = i2c->addr;
+	info.flags = i2c->flags;
+
+	sd = v4l2_i2c_new_subdev_board(v4l2_dev, adapter, &info, NULL);
+	if (sd) {
+		if (i2c->is_video)
+			go->sd_video = sd;
+		if (i2c->is_audio)
+			go->sd_audio = sd;
+		return 0;
+	}
+
+	pr_info("go7007: probing for module i2c:%s failed\n", i2c->type);
+	return -EINVAL;
+}
+
+/*
+ * Detach and unregister the encoder.  The go7007 struct won't be freed
+ * until v4l2 finishes releasing its resources and all associated fds are
+ * closed by applications.
+ */
+static void go7007_remove(struct v4l2_device *v4l2_dev)
+{
+	struct go7007 *go = container_of(v4l2_dev, struct go7007, v4l2_dev);
+
+	v4l2_device_unregister(v4l2_dev);
+	if (go->hpi_ops->release)
+		go->hpi_ops->release(go);
+	if (go->i2c_adapter_online) {
+		i2c_del_adapter(&go->i2c_adapter);
+		go->i2c_adapter_online = 0;
+	}
+
+	kfree(go->boot_fw);
+	go7007_v4l2_remove(go);
+	kfree(go);
+}
+
+/*
+ * Finalize the GO7007 hardware setup, register the on-board I2C adapter
+ * (if used on this board), load the I2C client driver for the sensor
+ * (SAA7115 or whatever) and other devices, and register the ALSA and V4L2
+ * interfaces.
+ *
+ * Must NOT be called with the hw_lock held.
+ */
+int go7007_register_encoder(struct go7007 *go, unsigned num_i2c_devs)
+{
+	int i, ret;
+
+	dev_info(go->dev, "go7007: registering new %s\n", go->name);
+
+	go->v4l2_dev.release = go7007_remove;
+	ret = v4l2_device_register(go->dev, &go->v4l2_dev);
+	if (ret < 0)
+		return ret;
+
+	mutex_lock(&go->hw_lock);
+	ret = go7007_init_encoder(go);
+	mutex_unlock(&go->hw_lock);
+	if (ret < 0)
+		return ret;
+
+	ret = go7007_v4l2_ctrl_init(go);
+	if (ret < 0)
+		return ret;
+
+	if (!go->i2c_adapter_online &&
+			go->board_info->flags & GO7007_BOARD_USE_ONBOARD_I2C) {
+		ret = go7007_i2c_init(go);
+		if (ret < 0)
+			return ret;
+		go->i2c_adapter_online = 1;
+	}
+	if (go->i2c_adapter_online) {
+		if (go->board_id == GO7007_BOARDID_ADS_USBAV_709) {
+			/* Reset the TW9906 */
+			go7007_write_addr(go, 0x3c82, 0x0009);
+			msleep(50);
+			go7007_write_addr(go, 0x3c82, 0x000d);
+		}
+		for (i = 0; i < num_i2c_devs; ++i)
+			init_i2c_module(&go->i2c_adapter, &go->board_info->i2c_devs[i]);
+
+		if (go->tuner_type >= 0) {
+			struct tuner_setup setup = {
+				.addr = ADDR_UNSET,
+				.type = go->tuner_type,
+				.mode_mask = T_ANALOG_TV,
+			};
+
+			v4l2_device_call_all(&go->v4l2_dev, 0, tuner,
+				s_type_addr, &setup);
+		}
+		if (go->board_id == GO7007_BOARDID_ADLINK_MPG24)
+			v4l2_subdev_call(go->sd_video, video, s_routing,
+					0, 0, go->channel_number + 1);
+	}
+
+	ret = go7007_v4l2_init(go);
+	if (ret < 0)
+		return ret;
+
+	if (go->board_info->flags & GO7007_BOARD_HAS_AUDIO) {
+		go->audio_enabled = 1;
+		go7007_snd_init(go);
+	}
+	return 0;
+}
+EXPORT_SYMBOL(go7007_register_encoder);
+
+/*
+ * Send the encode firmware to the encoder, which will cause it
+ * to immediately start delivering the video and audio streams.
+ *
+ * Must be called with the hw_lock held.
+ */
+int go7007_start_encoder(struct go7007 *go)
+{
+	u8 *fw;
+	int fw_len, rv = 0, i, x, y;
+	u16 intr_val, intr_data;
+
+	go->modet_enable = 0;
+	for (i = 0; i < 4; i++)
+		go->modet[i].enable = 0;
+
+	switch (v4l2_ctrl_g_ctrl(go->modet_mode)) {
+	case V4L2_DETECT_MD_MODE_GLOBAL:
+		memset(go->modet_map, 0, sizeof(go->modet_map));
+		go->modet[0].enable = 1;
+		go->modet_enable = 1;
+		break;
+	case V4L2_DETECT_MD_MODE_REGION_GRID:
+		for (y = 0; y < go->height / 16; y++) {
+			for (x = 0; x < go->width / 16; x++) {
+				int idx = y * go->width / 16 + x;
+
+				go->modet[go->modet_map[idx]].enable = 1;
+			}
+		}
+		go->modet_enable = 1;
+		break;
+	}
+
+	if (go->dvd_mode)
+		go->modet_enable = 0;
+
+	if (go7007_construct_fw_image(go, &fw, &fw_len) < 0)
+		return -1;
+
+	if (go7007_send_firmware(go, fw, fw_len) < 0 ||
+			go7007_read_interrupt(go, &intr_val, &intr_data) < 0) {
+		v4l2_err(&go->v4l2_dev, "error transferring firmware\n");
+		rv = -1;
+		goto start_error;
+	}
+
+	go->state = STATE_DATA;
+	go->parse_length = 0;
+	go->seen_frame = 0;
+	if (go7007_stream_start(go) < 0) {
+		v4l2_err(&go->v4l2_dev, "error starting stream transfer\n");
+		rv = -1;
+		goto start_error;
+	}
+
+start_error:
+	kfree(fw);
+	return rv;
+}
+
+/*
+ * Store a byte in the current video buffer, if there is one.
+ */
+static inline void store_byte(struct go7007_buffer *vb, u8 byte)
+{
+	if (vb && vb->vb.v4l2_planes[0].bytesused < GO7007_BUF_SIZE) {
+		u8 *ptr = vb2_plane_vaddr(&vb->vb, 0);
+
+		ptr[vb->vb.v4l2_planes[0].bytesused++] = byte;
+	}
+}
+
+static void go7007_set_motion_regions(struct go7007 *go, struct go7007_buffer *vb,
+		u32 motion_regions)
+{
+	if (motion_regions != go->modet_event_status) {
+		struct v4l2_event ev = {
+			.type = V4L2_EVENT_MOTION_DET,
+			.u.motion_det = {
+				.flags = V4L2_EVENT_MD_FL_HAVE_FRAME_SEQ,
+				.frame_sequence = vb->vb.v4l2_buf.sequence,
+				.region_mask = motion_regions,
+			},
+		};
+
+		v4l2_event_queue(&go->vdev, &ev);
+		go->modet_event_status = motion_regions;
+	}
+}
+
+/*
+ * Determine regions with motion and send a motion detection event
+ * in case of changes.
+ */
+static void go7007_motion_regions(struct go7007 *go, struct go7007_buffer *vb)
+{
+	u32 *bytesused = &vb->vb.v4l2_planes[0].bytesused;
+	unsigned motion[4] = { 0, 0, 0, 0 };
+	u32 motion_regions = 0;
+	unsigned stride = (go->width + 7) >> 3;
+	unsigned x, y;
+	int i;
+
+	for (i = 0; i < 216; ++i)
+		store_byte(vb, go->active_map[i]);
+	for (y = 0; y < go->height / 16; y++) {
+		for (x = 0; x < go->width / 16; x++) {
+			if (!(go->active_map[y * stride + (x >> 3)] & (1 << (x & 7))))
+				continue;
+			motion[go->modet_map[y * (go->width / 16) + x]]++;
+		}
+	}
+	motion_regions = ((motion[0] > 0) << 0) |
+			 ((motion[1] > 0) << 1) |
+			 ((motion[2] > 0) << 2) |
+			 ((motion[3] > 0) << 3);
+	*bytesused -= 216;
+	go7007_set_motion_regions(go, vb, motion_regions);
+}
+
+/*
+ * Deliver the last video buffer and get a new one to start writing to.
+ */
+static struct go7007_buffer *frame_boundary(struct go7007 *go, struct go7007_buffer *vb)
+{
+	u32 *bytesused = &vb->vb.v4l2_planes[0].bytesused;
+	struct go7007_buffer *vb_tmp = NULL;
+
+	if (vb == NULL) {
+		spin_lock(&go->spinlock);
+		if (!list_empty(&go->vidq_active))
+			vb = go->active_buf =
+				list_first_entry(&go->vidq_active, struct go7007_buffer, list);
+		spin_unlock(&go->spinlock);
+		go->next_seq++;
+		return vb;
+	}
+
+	vb->vb.v4l2_buf.sequence = go->next_seq++;
+	if (vb->modet_active && *bytesused + 216 < GO7007_BUF_SIZE)
+		go7007_motion_regions(go, vb);
+	else
+		go7007_set_motion_regions(go, vb, 0);
+
+	v4l2_get_timestamp(&vb->vb.v4l2_buf.timestamp);
+	vb_tmp = vb;
+	spin_lock(&go->spinlock);
+	list_del(&vb->list);
+	if (list_empty(&go->vidq_active))
+		vb = NULL;
+	else
+		vb = list_first_entry(&go->vidq_active, struct go7007_buffer, list);
+	go->active_buf = vb;
+	spin_unlock(&go->spinlock);
+	vb2_buffer_done(&vb_tmp->vb, VB2_BUF_STATE_DONE);
+	return vb;
+}
+
+static void write_bitmap_word(struct go7007 *go)
+{
+	int x, y, i, stride = ((go->width >> 4) + 7) >> 3;
+
+	for (i = 0; i < 16; ++i) {
+		y = (((go->parse_length - 1) << 3) + i) / (go->width >> 4);
+		x = (((go->parse_length - 1) << 3) + i) % (go->width >> 4);
+		if (stride * y + (x >> 3) < sizeof(go->active_map))
+			go->active_map[stride * y + (x >> 3)] |=
+					(go->modet_word & 1) << (x & 0x7);
+		go->modet_word >>= 1;
+	}
+}
+
+/*
+ * Parse a chunk of the video stream into frames.  The frames are not
+ * delimited by the hardware, so we have to parse the frame boundaries
+ * based on the type of video stream we're receiving.
+ */
+void go7007_parse_video_stream(struct go7007 *go, u8 *buf, int length)
+{
+	struct go7007_buffer *vb = go->active_buf;
+	int i, seq_start_code = -1, gop_start_code = -1, frame_start_code = -1;
+
+	switch (go->format) {
+	case V4L2_PIX_FMT_MPEG4:
+		seq_start_code = 0xB0;
+		gop_start_code = 0xB3;
+		frame_start_code = 0xB6;
+		break;
+	case V4L2_PIX_FMT_MPEG1:
+	case V4L2_PIX_FMT_MPEG2:
+		seq_start_code = 0xB3;
+		gop_start_code = 0xB8;
+		frame_start_code = 0x00;
+		break;
+	}
+
+	for (i = 0; i < length; ++i) {
+		if (vb && vb->vb.v4l2_planes[0].bytesused >= GO7007_BUF_SIZE - 3) {
+			v4l2_info(&go->v4l2_dev, "dropping oversized frame\n");
+			vb->vb.v4l2_planes[0].bytesused = 0;
+			vb->frame_offset = 0;
+			vb->modet_active = 0;
+			vb = go->active_buf = NULL;
+		}
+
+		switch (go->state) {
+		case STATE_DATA:
+			switch (buf[i]) {
+			case 0x00:
+				go->state = STATE_00;
+				break;
+			case 0xFF:
+				go->state = STATE_FF;
+				break;
+			default:
+				store_byte(vb, buf[i]);
+				break;
+			}
+			break;
+		case STATE_00:
+			switch (buf[i]) {
+			case 0x00:
+				go->state = STATE_00_00;
+				break;
+			case 0xFF:
+				store_byte(vb, 0x00);
+				go->state = STATE_FF;
+				break;
+			default:
+				store_byte(vb, 0x00);
+				store_byte(vb, buf[i]);
+				go->state = STATE_DATA;
+				break;
+			}
+			break;
+		case STATE_00_00:
+			switch (buf[i]) {
+			case 0x00:
+				store_byte(vb, 0x00);
+				/* go->state remains STATE_00_00 */
+				break;
+			case 0x01:
+				go->state = STATE_00_00_01;
+				break;
+			case 0xFF:
+				store_byte(vb, 0x00);
+				store_byte(vb, 0x00);
+				go->state = STATE_FF;
+				break;
+			default:
+				store_byte(vb, 0x00);
+				store_byte(vb, 0x00);
+				store_byte(vb, buf[i]);
+				go->state = STATE_DATA;
+				break;
+			}
+			break;
+		case STATE_00_00_01:
+			if (buf[i] == 0xF8 && go->modet_enable == 0) {
+				/* MODET start code, but MODET not enabled */
+				store_byte(vb, 0x00);
+				store_byte(vb, 0x00);
+				store_byte(vb, 0x01);
+				store_byte(vb, 0xF8);
+				go->state = STATE_DATA;
+				break;
+			}
+			/* If this is the start of a new MPEG frame,
+			 * get a new buffer */
+			if ((go->format == V4L2_PIX_FMT_MPEG1 ||
+			     go->format == V4L2_PIX_FMT_MPEG2 ||
+			     go->format == V4L2_PIX_FMT_MPEG4) &&
+			    (buf[i] == seq_start_code ||
+			     buf[i] == gop_start_code ||
+			     buf[i] == frame_start_code)) {
+				if (vb == NULL || go->seen_frame)
+					vb = frame_boundary(go, vb);
+				go->seen_frame = buf[i] == frame_start_code;
+				if (vb && go->seen_frame)
+					vb->frame_offset = vb->vb.v4l2_planes[0].bytesused;
+			}
+			/* Handle any special chunk types, or just write the
+			 * start code to the (potentially new) buffer */
+			switch (buf[i]) {
+			case 0xF5: /* timestamp */
+				go->parse_length = 12;
+				go->state = STATE_UNPARSED;
+				break;
+			case 0xF6: /* vbi */
+				go->state = STATE_VBI_LEN_A;
+				break;
+			case 0xF8: /* MD map */
+				go->parse_length = 0;
+				memset(go->active_map, 0,
+						sizeof(go->active_map));
+				go->state = STATE_MODET_MAP;
+				break;
+			case 0xFF: /* Potential JPEG start code */
+				store_byte(vb, 0x00);
+				store_byte(vb, 0x00);
+				store_byte(vb, 0x01);
+				go->state = STATE_FF;
+				break;
+			default:
+				store_byte(vb, 0x00);
+				store_byte(vb, 0x00);
+				store_byte(vb, 0x01);
+				store_byte(vb, buf[i]);
+				go->state = STATE_DATA;
+				break;
+			}
+			break;
+		case STATE_FF:
+			switch (buf[i]) {
+			case 0x00:
+				store_byte(vb, 0xFF);
+				go->state = STATE_00;
+				break;
+			case 0xFF:
+				store_byte(vb, 0xFF);
+				/* go->state remains STATE_FF */
+				break;
+			case 0xD8:
+				if (go->format == V4L2_PIX_FMT_MJPEG)
+					vb = frame_boundary(go, vb);
+				/* fall through */
+			default:
+				store_byte(vb, 0xFF);
+				store_byte(vb, buf[i]);
+				go->state = STATE_DATA;
+				break;
+			}
+			break;
+		case STATE_VBI_LEN_A:
+			go->parse_length = buf[i] << 8;
+			go->state = STATE_VBI_LEN_B;
+			break;
+		case STATE_VBI_LEN_B:
+			go->parse_length |= buf[i];
+			if (go->parse_length > 0)
+				go->state = STATE_UNPARSED;
+			else
+				go->state = STATE_DATA;
+			break;
+		case STATE_MODET_MAP:
+			if (go->parse_length < 204) {
+				if (go->parse_length & 1) {
+					go->modet_word |= buf[i];
+					write_bitmap_word(go);
+				} else
+					go->modet_word = buf[i] << 8;
+			} else if (go->parse_length == 207 && vb) {
+				vb->modet_active = buf[i];
+			}
+			if (++go->parse_length == 208)
+				go->state = STATE_DATA;
+			break;
+		case STATE_UNPARSED:
+			if (--go->parse_length == 0)
+				go->state = STATE_DATA;
+			break;
+		}
+	}
+}
+EXPORT_SYMBOL(go7007_parse_video_stream);
+
+/*
+ * Allocate a new go7007 struct.  Used by the hardware-specific probe.
+ */
+struct go7007 *go7007_alloc(const struct go7007_board_info *board,
+						struct device *dev)
+{
+	struct go7007 *go;
+	int i;
+
+	go = kzalloc(sizeof(struct go7007), GFP_KERNEL);
+	if (go == NULL)
+		return NULL;
+	go->dev = dev;
+	go->board_info = board;
+	go->board_id = 0;
+	go->tuner_type = -1;
+	go->channel_number = 0;
+	go->name[0] = 0;
+	mutex_init(&go->hw_lock);
+	init_waitqueue_head(&go->frame_waitq);
+	spin_lock_init(&go->spinlock);
+	go->status = STATUS_INIT;
+	memset(&go->i2c_adapter, 0, sizeof(go->i2c_adapter));
+	go->i2c_adapter_online = 0;
+	go->interrupt_available = 0;
+	init_waitqueue_head(&go->interrupt_waitq);
+	go->input = 0;
+	go7007_update_board(go);
+	go->encoder_h_halve = 0;
+	go->encoder_v_halve = 0;
+	go->encoder_subsample = 0;
+	go->format = V4L2_PIX_FMT_MJPEG;
+	go->bitrate = 1500000;
+	go->fps_scale = 1;
+	go->pali = 0;
+	go->aspect_ratio = GO7007_RATIO_1_1;
+	go->gop_size = 0;
+	go->ipb = 0;
+	go->closed_gop = 0;
+	go->repeat_seqhead = 0;
+	go->seq_header_enable = 0;
+	go->gop_header_enable = 0;
+	go->dvd_mode = 0;
+	go->interlace_coding = 0;
+	for (i = 0; i < 4; ++i)
+		go->modet[i].enable = 0;
+	for (i = 0; i < 1624; ++i)
+		go->modet_map[i] = 0;
+	go->audio_deliver = NULL;
+	go->audio_enabled = 0;
+
+	return go;
+}
+EXPORT_SYMBOL(go7007_alloc);
+
+void go7007_update_board(struct go7007 *go)
+{
+	const struct go7007_board_info *board = go->board_info;
+
+	if (board->sensor_flags & GO7007_SENSOR_TV) {
+		go->standard = GO7007_STD_NTSC;
+		go->std = V4L2_STD_NTSC_M;
+		go->width = 720;
+		go->height = 480;
+		go->sensor_framerate = 30000;
+	} else {
+		go->standard = GO7007_STD_OTHER;
+		go->width = board->sensor_width;
+		go->height = board->sensor_height;
+		go->sensor_framerate = board->sensor_framerate;
+	}
+	go->encoder_v_offset = board->sensor_v_offset;
+	go->encoder_h_offset = board->sensor_h_offset;
+}
+EXPORT_SYMBOL(go7007_update_board);
+
+MODULE_LICENSE("GPL v2");