drivers/media/usb/go7007/s2250-board.c - linux - Git at Google

 // SPDX-License-Identifier: GPL-2.0-only
 /*
  * Copyright (C) 2008 Sensoray Company Inc.
  */

 #include <linux/module.h>
 #include <linux/usb.h>
 #include <linux/i2c.h>
 #include <linux/videodev2.h>
 #include <linux/slab.h>
 #include <media/v4l2-device.h>
 #include <media/v4l2-common.h>
 #include <media/v4l2-subdev.h>
 #include "go7007-priv.h"

 MODULE_DESCRIPTION("Sensoray 2250/2251 i2c v4l2 subdev driver");
 MODULE_LICENSE("GPL v2");

 /*
  * Note: this board has two i2c devices: a vpx3226f and a tlv320aic23b.
  * Due to the unusual way these are accessed on this device we do not
  * reuse the i2c drivers, but instead they are implemented in this
  * driver. It would be nice to improve on this, though.
  */

 #define TLV320_ADDRESS      0x34
 #define VPX322_ADDR_ANALOGCONTROL1	0x02
 #define VPX322_ADDR_BRIGHTNESS0		0x0127
 #define VPX322_ADDR_BRIGHTNESS1		0x0131
 #define VPX322_ADDR_CONTRAST0		0x0128
 #define VPX322_ADDR_CONTRAST1		0x0132
 #define VPX322_ADDR_HUE			0x00dc
 #define VPX322_ADDR_SAT			0x0030

 struct go7007_usb_board {
 	unsigned int flags;
 	struct go7007_board_info main_info;
 };

 struct go7007_usb {
 	struct go7007_usb_board *board;
 	struct mutex i2c_lock;
 	struct usb_device *usbdev;
 	struct urb *video_urbs[8];
 	struct urb *audio_urbs[8];
 	struct urb *intr_urb;
 };

 static unsigned char aud_regs[] = {
 	0x1e, 0x00,
 	0x00, 0x17,
 	0x02, 0x17,
 	0x04, 0xf9,
 	0x06, 0xf9,
 	0x08, 0x02,
 	0x0a, 0x00,
 	0x0c, 0x00,
 	0x0a, 0x00,
 	0x0c, 0x00,
 	0x0e, 0x02,
 	0x10, 0x00,
 	0x12, 0x01,
 	0x00, 0x00,
 };


 static unsigned char vid_regs[] = {
 	0xF2, 0x0f,
 	0xAA, 0x00,
 	0xF8, 0xff,
 	0x00, 0x00,
 };

 static u16 vid_regs_fp[] = {
 	0x028, 0x067,
 	0x120, 0x016,
 	0x121, 0xcF2,
 	0x122, 0x0F2,
 	0x123, 0x00c,
 	0x124, 0x2d0,
 	0x125, 0x2e0,
 	0x126, 0x004,
 	0x128, 0x1E0,
 	0x12A, 0x016,
 	0x12B, 0x0F2,
 	0x12C, 0x0F2,
 	0x12D, 0x00c,
 	0x12E, 0x2d0,
 	0x12F, 0x2e0,
 	0x130, 0x004,
 	0x132, 0x1E0,
 	0x140, 0x060,
 	0x153, 0x00C,
 	0x154, 0x200,
 	0x150, 0x801,
 	0x000, 0x000
 };

 /* PAL specific values */
 static u16 vid_regs_fp_pal[] = {
 	0x120, 0x017,
 	0x121, 0xd22,
 	0x122, 0x122,
 	0x12A, 0x017,
 	0x12B, 0x122,
 	0x12C, 0x122,
 	0x140, 0x060,
 	0x000, 0x000,
 };

 struct s2250 {
 	struct v4l2_subdev sd;
 	struct v4l2_ctrl_handler hdl;
 	v4l2_std_id std;
 	int input;
 	int brightness;
 	int contrast;
 	int saturation;
 	int hue;
 	int reg12b_val;
 	int audio_input;
 	struct i2c_client *audio;
 };

 static inline struct s2250 *to_state(struct v4l2_subdev *sd)
 {
 	return container_of(sd, struct s2250, sd);
 }

 /* from go7007-usb.c which is Copyright (C) 2005-2006 Micronas USA Inc.*/
 static int go7007_usb_vendor_request(struct go7007 *go, u16 request,
 	u16 value, u16 index, void *transfer_buffer, int length, int in)
 {
 	struct go7007_usb *usb = go->hpi_context;
 	int timeout = 5000;

 	if (in) {
 		return usb_control_msg(usb->usbdev,
 				usb_rcvctrlpipe(usb->usbdev, 0), request,
 				USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN,
 				value, index, transfer_buffer, length, timeout);
 	} else {
 		return usb_control_msg(usb->usbdev,
 				usb_sndctrlpipe(usb->usbdev, 0), request,
 				USB_TYPE_VENDOR | USB_RECIP_DEVICE,
 				value, index, transfer_buffer, length, timeout);
 	}
 }
 /* end from go7007-usb.c which is Copyright (C) 2005-2006 Micronas USA Inc.*/

 static int write_reg(struct i2c_client *client, u8 reg, u8 value)
 {
 	struct go7007 *go = i2c_get_adapdata(client->adapter);
 	struct go7007_usb *usb;
 	int rc;
 	int dev_addr = client->addr << 1;  /* firmware wants 8-bit address */
 	u8 *buf;

 	if (go == NULL)
 		return -ENODEV;

 	if (go->status == STATUS_SHUTDOWN)
 		return -EBUSY;

 	buf = kzalloc(16, GFP_KERNEL);
 	if (buf == NULL)
 		return -ENOMEM;

 	usb = go->hpi_context;
 	if (mutex_lock_interruptible(&usb->i2c_lock) != 0) {
 		dev_info(&client->dev, "i2c lock failed\n");
 		kfree(buf);
 		return -EINTR;
 	}
 	rc = go7007_usb_vendor_request(go, 0x55, dev_addr,
 				       (reg<<8 | value),
 				       buf,
 				       16, 1);

 	mutex_unlock(&usb->i2c_lock);
 	kfree(buf);
 	return rc;
 }

 static int write_reg_fp(struct i2c_client *client, u16 addr, u16 val)
 {
 	struct go7007 *go = i2c_get_adapdata(client->adapter);
 	struct go7007_usb *usb;
 	int rc;
 	u8 *buf;
 	struct s2250 *dec = i2c_get_clientdata(client);

 	if (go == NULL)
 		return -ENODEV;

 	if (go->status == STATUS_SHUTDOWN)
 		return -EBUSY;

 	buf = kzalloc(16, GFP_KERNEL);

 	if (buf == NULL)
 		return -ENOMEM;


 	memset(buf, 0xcd, 6);

 	usb = go->hpi_context;
 	if (mutex_lock_interruptible(&usb->i2c_lock) != 0) {
 		dev_info(&client->dev, "i2c lock failed\n");
 		kfree(buf);
 		return -EINTR;
 	}
 	rc = go7007_usb_vendor_request(go, 0x57, addr, val, buf, 16, 1);
 	mutex_unlock(&usb->i2c_lock);
 	if (rc < 0) {
 		kfree(buf);
 		return rc;
 	}

 	if (buf[0] == 0) {
 		unsigned int subaddr, val_read;

 		subaddr = (buf[4] << 8) + buf[5];
 		val_read = (buf[2] << 8) + buf[3];
 		kfree(buf);
 		if (val_read != val) {
 			dev_info(&client->dev, "invalid fp write %x %x\n",
 				 val_read, val);
 			return -EFAULT;
 		}
 		if (subaddr != addr) {
 			dev_info(&client->dev, "invalid fp write addr %x %x\n",
 				 subaddr, addr);
 			return -EFAULT;
 		}
 	} else {
 		kfree(buf);
 		return -EFAULT;
 	}

 	/* save last 12b value */
 	if (addr == 0x12b)
 		dec->reg12b_val = val;

 	return 0;
 }

 static int read_reg_fp(struct i2c_client *client, u16 addr, u16 *val)
 {
 	struct go7007 *go = i2c_get_adapdata(client->adapter);
 	struct go7007_usb *usb;
 	int rc;
 	u8 *buf;

 	if (go == NULL)
 		return -ENODEV;

 	if (go->status == STATUS_SHUTDOWN)
 		return -EBUSY;

 	buf = kzalloc(16, GFP_KERNEL);

 	if (buf == NULL)
 		return -ENOMEM;


 	memset(buf, 0xcd, 6);
 	usb = go->hpi_context;
 	if (mutex_lock_interruptible(&usb->i2c_lock) != 0) {
 		dev_info(&client->dev, "i2c lock failed\n");
 		kfree(buf);
 		return -EINTR;
 	}
 	rc = go7007_usb_vendor_request(go, 0x58, addr, 0, buf, 16, 1);
 	mutex_unlock(&usb->i2c_lock);
 	if (rc < 0) {
 		kfree(buf);
 		return rc;
 	}

 	*val = (buf[0] << 8) | buf[1];
 	kfree(buf);

 	return 0;
 }


 static int write_regs(struct i2c_client *client, u8 *regs)
 {
 	int i;

 	for (i = 0; !((regs[i] == 0x00) && (regs[i+1] == 0x00)); i += 2) {
 		if (write_reg(client, regs[i], regs[i+1]) < 0) {
 			dev_info(&client->dev, "failed\n");
 			return -1;
 		}
 	}
 	return 0;
 }

 static int write_regs_fp(struct i2c_client *client, u16 *regs)
 {
 	int i;

 	for (i = 0; !((regs[i] == 0x00) && (regs[i+1] == 0x00)); i += 2) {
 		if (write_reg_fp(client, regs[i], regs[i+1]) < 0) {
 			dev_info(&client->dev, "failed fp\n");
 			return -1;
 		}
 	}
 	return 0;
 }


 /* ------------------------------------------------------------------------- */

 static int s2250_s_video_routing(struct v4l2_subdev *sd, u32 input, u32 output,
 				 u32 config)
 {
 	struct s2250 *state = to_state(sd);
 	struct i2c_client *client = v4l2_get_subdevdata(sd);
 	int vidsys;

 	vidsys = (state->std == V4L2_STD_NTSC) ? 0x01 : 0x00;
 	if (input == 0) {
 		/* composite */
 		write_reg_fp(client, 0x20, 0x020 | vidsys);
 		write_reg_fp(client, 0x21, 0x662);
 		write_reg_fp(client, 0x140, 0x060);
 	} else if (input == 1) {
 		/* S-Video */
 		write_reg_fp(client, 0x20, 0x040 | vidsys);
 		write_reg_fp(client, 0x21, 0x666);
 		write_reg_fp(client, 0x140, 0x060);
 	} else {
 		return -EINVAL;
 	}
 	state->input = input;
 	return 0;
 }

 static int s2250_s_std(struct v4l2_subdev *sd, v4l2_std_id norm)
 {
 	struct s2250 *state = to_state(sd);
 	struct i2c_client *client = v4l2_get_subdevdata(sd);
 	u16 vidsource;

 	vidsource = (state->input == 1) ? 0x040 : 0x020;
 	if (norm & V4L2_STD_625_50) {
 		write_regs_fp(client, vid_regs_fp);
 		write_regs_fp(client, vid_regs_fp_pal);
 		write_reg_fp(client, 0x20, vidsource);
 	} else {
 		write_regs_fp(client, vid_regs_fp);
 		write_reg_fp(client, 0x20, vidsource | 1);
 	}
 	state->std = norm;
 	return 0;
 }

 static int s2250_s_ctrl(struct v4l2_ctrl *ctrl)
 {
 	struct s2250 *state = container_of(ctrl->handler, struct s2250, hdl);
 	struct i2c_client *client = v4l2_get_subdevdata(&state->sd);
 	u16 oldvalue;

 	switch (ctrl->id) {
 	case V4L2_CID_BRIGHTNESS:
 		read_reg_fp(client, VPX322_ADDR_BRIGHTNESS0, &oldvalue);
 		write_reg_fp(client, VPX322_ADDR_BRIGHTNESS0,
 			     ctrl->val | (oldvalue & ~0xff));
 		read_reg_fp(client, VPX322_ADDR_BRIGHTNESS1, &oldvalue);
 		write_reg_fp(client, VPX322_ADDR_BRIGHTNESS1,
 			     ctrl->val | (oldvalue & ~0xff));
 		write_reg_fp(client, 0x140, 0x60);
 		break;
 	case V4L2_CID_CONTRAST:
 		read_reg_fp(client, VPX322_ADDR_CONTRAST0, &oldvalue);
 		write_reg_fp(client, VPX322_ADDR_CONTRAST0,
 			     ctrl->val | (oldvalue & ~0x3f));
 		read_reg_fp(client, VPX322_ADDR_CONTRAST1, &oldvalue);
 		write_reg_fp(client, VPX322_ADDR_CONTRAST1,
 			     ctrl->val | (oldvalue & ~0x3f));
 		write_reg_fp(client, 0x140, 0x60);
 		break;
 	case V4L2_CID_SATURATION:
 		write_reg_fp(client, VPX322_ADDR_SAT, ctrl->val);
 		break;
 	case V4L2_CID_HUE:
 		write_reg_fp(client, VPX322_ADDR_HUE, ctrl->val);
 		break;
 	default:
 		return -EINVAL;
 	}
 	return 0;
 }

 static int s2250_set_fmt(struct v4l2_subdev *sd,
 		struct v4l2_subdev_state *sd_state,
 		struct v4l2_subdev_format *format)
 {
 	struct v4l2_mbus_framefmt *fmt = &format->format;
 	struct s2250 *state = to_state(sd);
 	struct i2c_client *client = v4l2_get_subdevdata(sd);

 	if (format->pad)
 		return -EINVAL;

 	if (format->which == V4L2_SUBDEV_FORMAT_TRY)
 		return 0;

 	if (fmt->height < 640) {
 		write_reg_fp(client, 0x12b, state->reg12b_val | 0x400);
 		write_reg_fp(client, 0x140, 0x060);
 	} else {
 		write_reg_fp(client, 0x12b, state->reg12b_val & ~0x400);
 		write_reg_fp(client, 0x140, 0x060);
 	}
 	return 0;
 }

 static int s2250_s_audio_routing(struct v4l2_subdev *sd, u32 input, u32 output,
 				 u32 config)
 {
 	struct s2250 *state = to_state(sd);

 	switch (input) {
 	case 0:
 		write_reg(state->audio, 0x08, 0x02); /* Line In */
 		break;
 	case 1:
 		write_reg(state->audio, 0x08, 0x04); /* Mic */
 		break;
 	case 2:
 		write_reg(state->audio, 0x08, 0x05); /* Mic Boost */
 		break;
 	default:
 		return -EINVAL;
 	}
 	state->audio_input = input;
 	return 0;
 }


 static int s2250_log_status(struct v4l2_subdev *sd)
 {
 	struct s2250 *state = to_state(sd);

 	v4l2_info(sd, "Standard: %s\n", state->std == V4L2_STD_NTSC ? "NTSC" :
 					state->std == V4L2_STD_PAL ? "PAL" :
 					state->std == V4L2_STD_SECAM ? "SECAM" :
 					"unknown");
 	v4l2_info(sd, "Input: %s\n", state->input == 0 ? "Composite" :
 					state->input == 1 ? "S-video" :
 					"error");
 	v4l2_info(sd, "Audio input: %s\n", state->audio_input == 0 ? "Line In" :
 					state->audio_input == 1 ? "Mic" :
 					state->audio_input == 2 ? "Mic Boost" :
 					"error");
 	return v4l2_ctrl_subdev_log_status(sd);
 }

 /* --------------------------------------------------------------------------*/

 static const struct v4l2_ctrl_ops s2250_ctrl_ops = {
 	.s_ctrl = s2250_s_ctrl,
 };

 static const struct v4l2_subdev_core_ops s2250_core_ops = {
 	.log_status = s2250_log_status,
 };

 static const struct v4l2_subdev_audio_ops s2250_audio_ops = {
 	.s_routing = s2250_s_audio_routing,
 };

 static const struct v4l2_subdev_video_ops s2250_video_ops = {
 	.s_std = s2250_s_std,
 	.s_routing = s2250_s_video_routing,
 };

 static const struct v4l2_subdev_pad_ops s2250_pad_ops = {
 	.set_fmt = s2250_set_fmt,
 };

 static const struct v4l2_subdev_ops s2250_ops = {
 	.core = &s2250_core_ops,
 	.audio = &s2250_audio_ops,
 	.video = &s2250_video_ops,
 	.pad = &s2250_pad_ops,
 };

 /* --------------------------------------------------------------------------*/

 static int s2250_probe(struct i2c_client *client)
 {
 	struct i2c_client *audio;
 	struct i2c_adapter *adapter = client->adapter;
 	struct s2250 *state;
 	struct v4l2_subdev *sd;
 	u8 *data;
 	struct go7007 *go = i2c_get_adapdata(adapter);
 	struct go7007_usb *usb = go->hpi_context;
 	int err = -EIO;

 	audio = i2c_new_dummy_device(adapter, TLV320_ADDRESS >> 1);
 	if (IS_ERR(audio))
 		return PTR_ERR(audio);

 	state = kzalloc(sizeof(struct s2250), GFP_KERNEL);
 	if (state == NULL) {
 		i2c_unregister_device(audio);
 		return -ENOMEM;
 	}

 	sd = &state->sd;
 	v4l2_i2c_subdev_init(sd, client, &s2250_ops);

 	v4l2_info(sd, "initializing %s at address 0x%x on %s\n",
 	       "Sensoray 2250/2251", client->addr, client->adapter->name);

 	v4l2_ctrl_handler_init(&state->hdl, 4);
 	v4l2_ctrl_new_std(&state->hdl, &s2250_ctrl_ops,
 		V4L2_CID_BRIGHTNESS, -128, 127, 1, 0);
 	v4l2_ctrl_new_std(&state->hdl, &s2250_ctrl_ops,
 		V4L2_CID_CONTRAST, 0, 0x3f, 1, 0x32);
 	v4l2_ctrl_new_std(&state->hdl, &s2250_ctrl_ops,
 		V4L2_CID_SATURATION, 0, 4094, 1, 2070);
 	v4l2_ctrl_new_std(&state->hdl, &s2250_ctrl_ops,
 		V4L2_CID_HUE, -512, 511, 1, 0);
 	sd->ctrl_handler = &state->hdl;
 	if (state->hdl.error) {
 		err = state->hdl.error;
 		goto fail;
 	}

 	state->std = V4L2_STD_NTSC;
 	state->brightness = 50;
 	state->contrast = 50;
 	state->saturation = 50;
 	state->hue = 0;
 	state->audio = audio;

 	/* initialize the audio */
 	if (write_regs(audio, aud_regs) < 0) {
 		dev_err(&client->dev, "error initializing audio\n");
 		goto fail;
 	}

 	if (write_regs(client, vid_regs) < 0) {
 		dev_err(&client->dev, "error initializing decoder\n");
 		goto fail;
 	}
 	if (write_regs_fp(client, vid_regs_fp) < 0) {
 		dev_err(&client->dev, "error initializing decoder\n");
 		goto fail;
 	}
 	/* set default channel */
 	/* composite */
 	write_reg_fp(client, 0x20, 0x020 | 1);
 	write_reg_fp(client, 0x21, 0x662);
 	write_reg_fp(client, 0x140, 0x060);

 	/* set default audio input */
 	state->audio_input = 0;
 	write_reg(client, 0x08, 0x02); /* Line In */

 	if (mutex_lock_interruptible(&usb->i2c_lock) == 0) {
 		data = kzalloc(16, GFP_KERNEL);
 		if (data != NULL) {
 			int rc = go7007_usb_vendor_request(go, 0x41, 0, 0,
 						       data, 16, 1);

 			if (rc > 0) {
 				u8 mask;

 				data[0] = 0;
 				mask = 1<<5;
 				data[0] &= ~mask;
 				data[1] |= mask;
 				go7007_usb_vendor_request(go, 0x40, 0,
 							  (data[1]<<8)
 							  + data[1],
 							  data, 16, 0);
 			}
 			kfree(data);
 		}
 		mutex_unlock(&usb->i2c_lock);
 	}

 	v4l2_info(sd, "initialized successfully\n");
 	return 0;

 fail:
 	i2c_unregister_device(audio);
 	v4l2_ctrl_handler_free(&state->hdl);
 	kfree(state);
 	return err;
 }

 static void s2250_remove(struct i2c_client *client)
 {
 	struct s2250 *state = to_state(i2c_get_clientdata(client));

 	i2c_unregister_device(state->audio);
 	v4l2_device_unregister_subdev(&state->sd);
 	v4l2_ctrl_handler_free(&state->hdl);
 	kfree(state);
 }

 static const struct i2c_device_id s2250_id[] = {
 	{ "s2250" },
 	{ }
 };
 MODULE_DEVICE_TABLE(i2c, s2250_id);

 static struct i2c_driver s2250_driver = {
 	.driver = {
 		.name	= "s2250",
 	},
 	.probe		= s2250_probe,
 	.remove		= s2250_remove,
 	.id_table	= s2250_id,
 };

 module_i2c_driver(s2250_driver);
	// SPDX-License-Identifier: GPL-2.0-only
	/*
	* Copyright (C) 2008 Sensoray Company Inc.
	*/

	#include <linux/module.h>
	#include <linux/usb.h>
	#include <linux/i2c.h>
	#include <linux/videodev2.h>
	#include <linux/slab.h>
	#include <media/v4l2-device.h>
	#include <media/v4l2-common.h>
	#include <media/v4l2-subdev.h>
	#include "go7007-priv.h"

	MODULE_DESCRIPTION("Sensoray 2250/2251 i2c v4l2 subdev driver");
	MODULE_LICENSE("GPL v2");

	/*
	* Note: this board has two i2c devices: a vpx3226f and a tlv320aic23b.
	* Due to the unusual way these are accessed on this device we do not
	* reuse the i2c drivers, but instead they are implemented in this
	* driver. It would be nice to improve on this, though.
	*/

	#define TLV320_ADDRESS 0x34
	#define VPX322_ADDR_ANALOGCONTROL1 0x02
	#define VPX322_ADDR_BRIGHTNESS0 0x0127
	#define VPX322_ADDR_BRIGHTNESS1 0x0131
	#define VPX322_ADDR_CONTRAST0 0x0128
	#define VPX322_ADDR_CONTRAST1 0x0132
	#define VPX322_ADDR_HUE 0x00dc
	#define VPX322_ADDR_SAT 0x0030

	struct go7007_usb_board {
	unsigned int flags;
	struct go7007_board_info main_info;
	};

	struct go7007_usb {
	struct go7007_usb_board *board;
	struct mutex i2c_lock;
	struct usb_device *usbdev;
	struct urb *video_urbs[8];
	struct urb *audio_urbs[8];
	struct urb *intr_urb;
	};

	static unsigned char aud_regs[] = {
	0x1e, 0x00,
	0x00, 0x17,
	0x02, 0x17,
	0x04, 0xf9,
	0x06, 0xf9,
	0x08, 0x02,
	0x0a, 0x00,
	0x0c, 0x00,
	0x0a, 0x00,
	0x0c, 0x00,
	0x0e, 0x02,
	0x10, 0x00,
	0x12, 0x01,
	0x00, 0x00,
	};


	static unsigned char vid_regs[] = {
	0xF2, 0x0f,
	0xAA, 0x00,
	0xF8, 0xff,
	0x00, 0x00,
	};

	static u16 vid_regs_fp[] = {
	0x028, 0x067,
	0x120, 0x016,
	0x121, 0xcF2,
	0x122, 0x0F2,
	0x123, 0x00c,
	0x124, 0x2d0,
	0x125, 0x2e0,
	0x126, 0x004,
	0x128, 0x1E0,
	0x12A, 0x016,
	0x12B, 0x0F2,
	0x12C, 0x0F2,
	0x12D, 0x00c,
	0x12E, 0x2d0,
	0x12F, 0x2e0,
	0x130, 0x004,
	0x132, 0x1E0,
	0x140, 0x060,
	0x153, 0x00C,
	0x154, 0x200,
	0x150, 0x801,
	0x000, 0x000
	};

	/* PAL specific values */
	static u16 vid_regs_fp_pal[] = {
	0x120, 0x017,
	0x121, 0xd22,
	0x122, 0x122,
	0x12A, 0x017,
	0x12B, 0x122,
	0x12C, 0x122,
	0x140, 0x060,
	0x000, 0x000,
	};

	struct s2250 {
	struct v4l2_subdev sd;
	struct v4l2_ctrl_handler hdl;
	v4l2_std_id std;
	int input;
	int brightness;
	int contrast;
	int saturation;
	int hue;
	int reg12b_val;
	int audio_input;
	struct i2c_client *audio;
	};

	static inline struct s2250 to_state(struct v4l2_subdev sd)
	{
	return container_of(sd, struct s2250, sd);
	}

	/* from go7007-usb.c which is Copyright (C) 2005-2006 Micronas USA Inc.*/
	static int go7007_usb_vendor_request(struct go7007 *go, u16 request,
	u16 value, u16 index, void *transfer_buffer, int length, int in)
	{
	struct go7007_usb *usb = go->hpi_context;
	int timeout = 5000;

	if (in) {
	return usb_control_msg(usb->usbdev,
	usb_rcvctrlpipe(usb->usbdev, 0), request,
	USB_TYPE_VENDOR \| USB_RECIP_DEVICE \| USB_DIR_IN,
	value, index, transfer_buffer, length, timeout);
	} else {
	return usb_control_msg(usb->usbdev,
	usb_sndctrlpipe(usb->usbdev, 0), request,
	USB_TYPE_VENDOR \| USB_RECIP_DEVICE,
	value, index, transfer_buffer, length, timeout);
	}
	}
	/* end from go7007-usb.c which is Copyright (C) 2005-2006 Micronas USA Inc.*/

	static int write_reg(struct i2c_client *client, u8 reg, u8 value)
	{
	struct go7007 *go = i2c_get_adapdata(client->adapter);
	struct go7007_usb *usb;
	int rc;
	int dev_addr = client->addr << 1; /* firmware wants 8-bit address */
	u8 *buf;

	if (go == NULL)
	return -ENODEV;

	if (go->status == STATUS_SHUTDOWN)
	return -EBUSY;

	buf = kzalloc(16, GFP_KERNEL);
	if (buf == NULL)
	return -ENOMEM;

	usb = go->hpi_context;
	if (mutex_lock_interruptible(&usb->i2c_lock) != 0) {
	dev_info(&client->dev, "i2c lock failed\n");
	kfree(buf);
	return -EINTR;
	}
	rc = go7007_usb_vendor_request(go, 0x55, dev_addr,
	(reg<<8 \| value),
	buf,
	16, 1);

	mutex_unlock(&usb->i2c_lock);
	kfree(buf);
	return rc;
	}

	static int write_reg_fp(struct i2c_client *client, u16 addr, u16 val)
	{
	struct go7007 *go = i2c_get_adapdata(client->adapter);
	struct go7007_usb *usb;
	int rc;
	u8 *buf;
	struct s2250 *dec = i2c_get_clientdata(client);

	if (go == NULL)
	return -ENODEV;

	if (go->status == STATUS_SHUTDOWN)
	return -EBUSY;

	buf = kzalloc(16, GFP_KERNEL);

	if (buf == NULL)
	return -ENOMEM;



	memset(buf, 0xcd, 6);

	usb = go->hpi_context;
	if (mutex_lock_interruptible(&usb->i2c_lock) != 0) {
	dev_info(&client->dev, "i2c lock failed\n");
	kfree(buf);
	return -EINTR;
	}
	rc = go7007_usb_vendor_request(go, 0x57, addr, val, buf, 16, 1);
	mutex_unlock(&usb->i2c_lock);
	if (rc < 0) {
	kfree(buf);
	return rc;
	}

	if (buf[0] == 0) {
	unsigned int subaddr, val_read;

	subaddr = (buf[4] << 8) + buf[5];
	val_read = (buf[2] << 8) + buf[3];
	kfree(buf);
	if (val_read != val) {
	dev_info(&client->dev, "invalid fp write %x %x\n",
	val_read, val);
	return -EFAULT;
	}
	if (subaddr != addr) {
	dev_info(&client->dev, "invalid fp write addr %x %x\n",
	subaddr, addr);
	return -EFAULT;
	}
	} else {
	kfree(buf);
	return -EFAULT;
	}

	/* save last 12b value */
	if (addr == 0x12b)
	dec->reg12b_val = val;

	return 0;
	}

	static int read_reg_fp(struct i2c_client client, u16 addr, u16 val)
	{
	struct go7007 *go = i2c_get_adapdata(client->adapter);
	struct go7007_usb *usb;
	int rc;
	u8 *buf;

	if (go == NULL)
	return -ENODEV;

	if (go->status == STATUS_SHUTDOWN)
	return -EBUSY;

	buf = kzalloc(16, GFP_KERNEL);

	if (buf == NULL)
	return -ENOMEM;



	memset(buf, 0xcd, 6);
	usb = go->hpi_context;
	if (mutex_lock_interruptible(&usb->i2c_lock) != 0) {
	dev_info(&client->dev, "i2c lock failed\n");
	kfree(buf);
	return -EINTR;
	}
	rc = go7007_usb_vendor_request(go, 0x58, addr, 0, buf, 16, 1);
	mutex_unlock(&usb->i2c_lock);
	if (rc < 0) {
	kfree(buf);
	return rc;
	}

	*val = (buf[0] << 8) \| buf[1];
	kfree(buf);

	return 0;
	}


	static int write_regs(struct i2c_client client, u8 regs)
	{
	int i;

	for (i = 0; !((regs[i] == 0x00) && (regs[i+1] == 0x00)); i += 2) {
	if (write_reg(client, regs[i], regs[i+1]) < 0) {
	dev_info(&client->dev, "failed\n");
	return -1;
	}
	}
	return 0;
	}

	static int write_regs_fp(struct i2c_client client, u16 regs)
	{
	int i;

	for (i = 0; !((regs[i] == 0x00) && (regs[i+1] == 0x00)); i += 2) {
	if (write_reg_fp(client, regs[i], regs[i+1]) < 0) {
	dev_info(&client->dev, "failed fp\n");
	return -1;
	}
	}
	return 0;
	}


	/* ------------------------------------------------------------------------- */

	static int s2250_s_video_routing(struct v4l2_subdev *sd, u32 input, u32 output,
	u32 config)
	{
	struct s2250 *state = to_state(sd);
	struct i2c_client *client = v4l2_get_subdevdata(sd);
	int vidsys;

	vidsys = (state->std == V4L2_STD_NTSC) ? 0x01 : 0x00;
	if (input == 0) {
	/* composite */
	write_reg_fp(client, 0x20, 0x020 \| vidsys);
	write_reg_fp(client, 0x21, 0x662);
	write_reg_fp(client, 0x140, 0x060);
	} else if (input == 1) {
	/* S-Video */
	write_reg_fp(client, 0x20, 0x040 \| vidsys);
	write_reg_fp(client, 0x21, 0x666);
	write_reg_fp(client, 0x140, 0x060);
	} else {
	return -EINVAL;
	}
	state->input = input;
	return 0;
	}

	static int s2250_s_std(struct v4l2_subdev *sd, v4l2_std_id norm)
	{
	struct s2250 *state = to_state(sd);
	struct i2c_client *client = v4l2_get_subdevdata(sd);
	u16 vidsource;

	vidsource = (state->input == 1) ? 0x040 : 0x020;
	if (norm & V4L2_STD_625_50) {
	write_regs_fp(client, vid_regs_fp);
	write_regs_fp(client, vid_regs_fp_pal);
	write_reg_fp(client, 0x20, vidsource);
	} else {
	write_regs_fp(client, vid_regs_fp);
	write_reg_fp(client, 0x20, vidsource \| 1);
	}
	state->std = norm;
	return 0;
	}

	static int s2250_s_ctrl(struct v4l2_ctrl *ctrl)
	{
	struct s2250 *state = container_of(ctrl->handler, struct s2250, hdl);
	struct i2c_client *client = v4l2_get_subdevdata(&state->sd);
	u16 oldvalue;

	switch (ctrl->id) {
	case V4L2_CID_BRIGHTNESS:
	read_reg_fp(client, VPX322_ADDR_BRIGHTNESS0, &oldvalue);
	write_reg_fp(client, VPX322_ADDR_BRIGHTNESS0,
	ctrl->val \| (oldvalue & ~0xff));
	read_reg_fp(client, VPX322_ADDR_BRIGHTNESS1, &oldvalue);
	write_reg_fp(client, VPX322_ADDR_BRIGHTNESS1,
	ctrl->val \| (oldvalue & ~0xff));
	write_reg_fp(client, 0x140, 0x60);
	break;
	case V4L2_CID_CONTRAST:
	read_reg_fp(client, VPX322_ADDR_CONTRAST0, &oldvalue);
	write_reg_fp(client, VPX322_ADDR_CONTRAST0,
	ctrl->val \| (oldvalue & ~0x3f));
	read_reg_fp(client, VPX322_ADDR_CONTRAST1, &oldvalue);
	write_reg_fp(client, VPX322_ADDR_CONTRAST1,
	ctrl->val \| (oldvalue & ~0x3f));
	write_reg_fp(client, 0x140, 0x60);
	break;
	case V4L2_CID_SATURATION:
	write_reg_fp(client, VPX322_ADDR_SAT, ctrl->val);
	break;
	case V4L2_CID_HUE:
	write_reg_fp(client, VPX322_ADDR_HUE, ctrl->val);
	break;
	default:
	return -EINVAL;
	}
	return 0;
	}

	static int s2250_set_fmt(struct v4l2_subdev *sd,
	struct v4l2_subdev_state *sd_state,
	struct v4l2_subdev_format *format)
	{
	struct v4l2_mbus_framefmt *fmt = &format->format;
	struct s2250 *state = to_state(sd);
	struct i2c_client *client = v4l2_get_subdevdata(sd);

	if (format->pad)
	return -EINVAL;

	if (format->which == V4L2_SUBDEV_FORMAT_TRY)
	return 0;

	if (fmt->height < 640) {
	write_reg_fp(client, 0x12b, state->reg12b_val \| 0x400);
	write_reg_fp(client, 0x140, 0x060);
	} else {
	write_reg_fp(client, 0x12b, state->reg12b_val & ~0x400);
	write_reg_fp(client, 0x140, 0x060);
	}
	return 0;
	}

	static int s2250_s_audio_routing(struct v4l2_subdev *sd, u32 input, u32 output,
	u32 config)
	{
	struct s2250 *state = to_state(sd);

	switch (input) {
	case 0:
	write_reg(state->audio, 0x08, 0x02); /* Line In */
	break;
	case 1:
	write_reg(state->audio, 0x08, 0x04); /* Mic */
	break;
	case 2:
	write_reg(state->audio, 0x08, 0x05); /* Mic Boost */
	break;
	default:
	return -EINVAL;
	}
	state->audio_input = input;
	return 0;
	}


	static int s2250_log_status(struct v4l2_subdev *sd)
	{
	struct s2250 *state = to_state(sd);

	v4l2_info(sd, "Standard: %s\n", state->std == V4L2_STD_NTSC ? "NTSC" :
	state->std == V4L2_STD_PAL ? "PAL" :
	state->std == V4L2_STD_SECAM ? "SECAM" :
	"unknown");
	v4l2_info(sd, "Input: %s\n", state->input == 0 ? "Composite" :
	state->input == 1 ? "S-video" :
	"error");
	v4l2_info(sd, "Audio input: %s\n", state->audio_input == 0 ? "Line In" :
	state->audio_input == 1 ? "Mic" :
	state->audio_input == 2 ? "Mic Boost" :
	"error");
	return v4l2_ctrl_subdev_log_status(sd);
	}

	/* --------------------------------------------------------------------------*/

	static const struct v4l2_ctrl_ops s2250_ctrl_ops = {
	.s_ctrl = s2250_s_ctrl,
	};

	static const struct v4l2_subdev_core_ops s2250_core_ops = {
	.log_status = s2250_log_status,
	};

	static const struct v4l2_subdev_audio_ops s2250_audio_ops = {
	.s_routing = s2250_s_audio_routing,
	};

	static const struct v4l2_subdev_video_ops s2250_video_ops = {
	.s_std = s2250_s_std,
	.s_routing = s2250_s_video_routing,
	};

	static const struct v4l2_subdev_pad_ops s2250_pad_ops = {
	.set_fmt = s2250_set_fmt,
	};

	static const struct v4l2_subdev_ops s2250_ops = {
	.core = &s2250_core_ops,
	.audio = &s2250_audio_ops,
	.video = &s2250_video_ops,
	.pad = &s2250_pad_ops,
	};

	/* --------------------------------------------------------------------------*/

	static int s2250_probe(struct i2c_client *client)
	{
	struct i2c_client *audio;
	struct i2c_adapter *adapter = client->adapter;
	struct s2250 *state;
	struct v4l2_subdev *sd;
	u8 *data;
	struct go7007 *go = i2c_get_adapdata(adapter);
	struct go7007_usb *usb = go->hpi_context;
	int err = -EIO;

	audio = i2c_new_dummy_device(adapter, TLV320_ADDRESS >> 1);
	if (IS_ERR(audio))
	return PTR_ERR(audio);

	state = kzalloc(sizeof(struct s2250), GFP_KERNEL);
	if (state == NULL) {
	i2c_unregister_device(audio);
	return -ENOMEM;
	}

	sd = &state->sd;
	v4l2_i2c_subdev_init(sd, client, &s2250_ops);

	v4l2_info(sd, "initializing %s at address 0x%x on %s\n",
	"Sensoray 2250/2251", client->addr, client->adapter->name);

	v4l2_ctrl_handler_init(&state->hdl, 4);
	v4l2_ctrl_new_std(&state->hdl, &s2250_ctrl_ops,
	V4L2_CID_BRIGHTNESS, -128, 127, 1, 0);
	v4l2_ctrl_new_std(&state->hdl, &s2250_ctrl_ops,
	V4L2_CID_CONTRAST, 0, 0x3f, 1, 0x32);
	v4l2_ctrl_new_std(&state->hdl, &s2250_ctrl_ops,
	V4L2_CID_SATURATION, 0, 4094, 1, 2070);
	v4l2_ctrl_new_std(&state->hdl, &s2250_ctrl_ops,
	V4L2_CID_HUE, -512, 511, 1, 0);
	sd->ctrl_handler = &state->hdl;
	if (state->hdl.error) {
	err = state->hdl.error;
	goto fail;
	}

	state->std = V4L2_STD_NTSC;
	state->brightness = 50;
	state->contrast = 50;
	state->saturation = 50;
	state->hue = 0;
	state->audio = audio;

	/* initialize the audio */
	if (write_regs(audio, aud_regs) < 0) {
	dev_err(&client->dev, "error initializing audio\n");
	goto fail;
	}

	if (write_regs(client, vid_regs) < 0) {
	dev_err(&client->dev, "error initializing decoder\n");
	goto fail;
	}
	if (write_regs_fp(client, vid_regs_fp) < 0) {
	dev_err(&client->dev, "error initializing decoder\n");
	goto fail;
	}
	/* set default channel */
	/* composite */
	write_reg_fp(client, 0x20, 0x020 \| 1);
	write_reg_fp(client, 0x21, 0x662);
	write_reg_fp(client, 0x140, 0x060);

	/* set default audio input */
	state->audio_input = 0;
	write_reg(client, 0x08, 0x02); /* Line In */

	if (mutex_lock_interruptible(&usb->i2c_lock) == 0) {
	data = kzalloc(16, GFP_KERNEL);
	if (data != NULL) {
	int rc = go7007_usb_vendor_request(go, 0x41, 0, 0,
	data, 16, 1);

	if (rc > 0) {
	u8 mask;

	data[0] = 0;
	mask = 1<<5;
	data[0] &= ~mask;
	data[1] \|= mask;
	go7007_usb_vendor_request(go, 0x40, 0,
	(data[1]<<8)
	+ data[1],
	data, 16, 0);
	}
	kfree(data);
	}
	mutex_unlock(&usb->i2c_lock);
	}

	v4l2_info(sd, "initialized successfully\n");
	return 0;

	fail:
	i2c_unregister_device(audio);
	v4l2_ctrl_handler_free(&state->hdl);
	kfree(state);
	return err;
	}

	static void s2250_remove(struct i2c_client *client)
	{
	struct s2250 *state = to_state(i2c_get_clientdata(client));

	i2c_unregister_device(state->audio);
	v4l2_device_unregister_subdev(&state->sd);
	v4l2_ctrl_handler_free(&state->hdl);
	kfree(state);
	}

	static const struct i2c_device_id s2250_id[] = {
	{ "s2250" },
	{ }
	};
	MODULE_DEVICE_TABLE(i2c, s2250_id);

	static struct i2c_driver s2250_driver = {
	.driver = {
	.name = "s2250",
	},
	.probe = s2250_probe,
	.remove = s2250_remove,
	.id_table = s2250_id,
	};

	module_i2c_driver(s2250_driver);