drivers/media/usb/gspca/tv8532.c - third_party/kernel - Git at Google

 // SPDX-License-Identifier: GPL-2.0-or-later
 /*
  * Quickcam cameras initialization data
  *
  * V4L2 by Jean-Francois Moine <http://moinejf.free.fr>
  */
 #define MODULE_NAME "tv8532"

 #include "gspca.h"

 MODULE_AUTHOR("Michel Xhaard <mxhaard@users.sourceforge.net>");
 MODULE_DESCRIPTION("TV8532 USB Camera Driver");
 MODULE_LICENSE("GPL");

 /* specific webcam descriptor */
 struct sd {
 	struct gspca_dev gspca_dev;	/* !! must be the first item */

 	__u8 packet;
 };

 static const struct v4l2_pix_format sif_mode[] = {
 	{176, 144, V4L2_PIX_FMT_SBGGR8, V4L2_FIELD_NONE,
 		.bytesperline = 176,
 		.sizeimage = 176 * 144,
 		.colorspace = V4L2_COLORSPACE_SRGB,
 		.priv = 1},
 	{352, 288, V4L2_PIX_FMT_SBGGR8, V4L2_FIELD_NONE,
 		.bytesperline = 352,
 		.sizeimage = 352 * 288,
 		.colorspace = V4L2_COLORSPACE_SRGB,
 		.priv = 0},
 };

 /* TV-8532A (ICM532A) registers (LE) */
 #define R00_PART_CONTROL 0x00
 #define		LATENT_CHANGE	0x80
 #define		EXPO_CHANGE	0x04
 #define R01_TIMING_CONTROL_LOW 0x01
 #define		CMD_EEprom_Open 0x30
 #define		CMD_EEprom_Close 0x29
 #define R03_TABLE_ADDR 0x03
 #define R04_WTRAM_DATA_L 0x04
 #define R05_WTRAM_DATA_M 0x05
 #define R06_WTRAM_DATA_H 0x06
 #define R07_TABLE_LEN	0x07
 #define R08_RAM_WRITE_ACTION 0x08
 #define R0C_AD_WIDTHL	0x0c
 #define R0D_AD_WIDTHH	0x0d
 #define R0E_AD_HEIGHTL	0x0e
 #define R0F_AD_HEIGHTH	0x0f
 #define R10_AD_COL_BEGINL 0x10
 #define R11_AD_COL_BEGINH 0x11
 #define		MIRROR		0x04	/* [10] */
 #define R14_AD_ROW_BEGINL 0x14
 #define R15_AD_ROWBEGINH  0x15
 #define R1C_AD_EXPOSE_TIMEL 0x1c
 #define R20_GAIN_G1L	0x20
 #define R21_GAIN_G1H	0x21
 #define R22_GAIN_RL	0x22
 #define R23_GAIN_RH	0x23
 #define R24_GAIN_BL	0x24
 #define R25_GAIN_BH	0x25
 #define R26_GAIN_G2L	0x26
 #define R27_GAIN_G2H	0x27
 #define R28_QUANT	0x28
 #define R29_LINE	0x29
 #define R2C_POLARITY	0x2c
 #define R2D_POINT	0x2d
 #define R2E_POINTH	0x2e
 #define R2F_POINTB	0x2f
 #define R30_POINTBH	0x30
 #define R31_UPD		0x31
 #define R2A_HIGH_BUDGET 0x2a
 #define R2B_LOW_BUDGET	0x2b
 #define R34_VID		0x34
 #define R35_VIDH	0x35
 #define R36_PID		0x36
 #define R37_PIDH	0x37
 #define R39_Test1	0x39		/* GPIO */
 #define R3B_Test3	0x3b		/* GPIO */
 #define R83_AD_IDH	0x83
 #define R91_AD_SLOPEREG 0x91
 #define R94_AD_BITCONTROL 0x94

 static const u8 eeprom_data[][3] = {
 /*	dataH dataM dataL */
 	{0x01, 0x00, 0x01},
 	{0x01, 0x80, 0x11},
 	{0x05, 0x00, 0x14},
 	{0x05, 0x00, 0x1c},
 	{0x0d, 0x00, 0x1e},
 	{0x05, 0x00, 0x1f},
 	{0x05, 0x05, 0x19},
 	{0x05, 0x01, 0x1b},
 	{0x05, 0x09, 0x1e},
 	{0x0d, 0x89, 0x2e},
 	{0x05, 0x89, 0x2f},
 	{0x05, 0x0d, 0xd9},
 	{0x05, 0x09, 0xf1},
 };


 /* write 1 byte */
 static void reg_w1(struct gspca_dev *gspca_dev,
 		  __u16 index, __u8 value)
 {
 	gspca_dev->usb_buf[0] = value;
 	usb_control_msg(gspca_dev->dev,
 			usb_sndctrlpipe(gspca_dev->dev, 0),
 			0x02,
 			USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
 			0,	/* value */
 			index, gspca_dev->usb_buf, 1, 500);
 }

 /* write 2 bytes */
 static void reg_w2(struct gspca_dev *gspca_dev,
 		  u16 index, u16 value)
 {
 	gspca_dev->usb_buf[0] = value;
 	gspca_dev->usb_buf[1] = value >> 8;
 	usb_control_msg(gspca_dev->dev,
 			usb_sndctrlpipe(gspca_dev->dev, 0),
 			0x02,
 			USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
 			0,	/* value */
 			index, gspca_dev->usb_buf, 2, 500);
 }

 static void tv_8532WriteEEprom(struct gspca_dev *gspca_dev)
 {
 	int i;

 	reg_w1(gspca_dev, R01_TIMING_CONTROL_LOW, CMD_EEprom_Open);
 	for (i = 0; i < ARRAY_SIZE(eeprom_data); i++) {
 		reg_w1(gspca_dev, R03_TABLE_ADDR, i);
 		reg_w1(gspca_dev, R04_WTRAM_DATA_L, eeprom_data[i][2]);
 		reg_w1(gspca_dev, R05_WTRAM_DATA_M, eeprom_data[i][1]);
 		reg_w1(gspca_dev, R06_WTRAM_DATA_H, eeprom_data[i][0]);
 		reg_w1(gspca_dev, R08_RAM_WRITE_ACTION, 0);
 	}
 	reg_w1(gspca_dev, R07_TABLE_LEN, i);
 	reg_w1(gspca_dev, R01_TIMING_CONTROL_LOW, CMD_EEprom_Close);
 }

 /* this function is called at probe time */
 static int sd_config(struct gspca_dev *gspca_dev,
 		     const struct usb_device_id *id)
 {
 	struct cam *cam;

 	cam = &gspca_dev->cam;
 	cam->cam_mode = sif_mode;
 	cam->nmodes = ARRAY_SIZE(sif_mode);

 	return 0;
 }

 static void tv_8532_setReg(struct gspca_dev *gspca_dev)
 {
 	reg_w1(gspca_dev, R3B_Test3, 0x0a);	/* Test0Sel = 10 */
 	/******************************************************/
 	reg_w1(gspca_dev, R0E_AD_HEIGHTL, 0x90);
 	reg_w1(gspca_dev, R0F_AD_HEIGHTH, 0x01);
 	reg_w2(gspca_dev, R1C_AD_EXPOSE_TIMEL, 0x018f);
 	reg_w1(gspca_dev, R10_AD_COL_BEGINL, 0x44);
 						/* begin active line */
 	reg_w1(gspca_dev, R11_AD_COL_BEGINH, 0x00);
 						/* mirror and digital gain */
 	reg_w1(gspca_dev, R14_AD_ROW_BEGINL, 0x0a);

 	reg_w1(gspca_dev, R94_AD_BITCONTROL, 0x02);
 	reg_w1(gspca_dev, R91_AD_SLOPEREG, 0x00);
 	reg_w1(gspca_dev, R00_PART_CONTROL, LATENT_CHANGE | EXPO_CHANGE);
 						/* = 0x84 */
 }

 /* this function is called at probe and resume time */
 static int sd_init(struct gspca_dev *gspca_dev)
 {
 	tv_8532WriteEEprom(gspca_dev);

 	return 0;
 }

 static void setexposure(struct gspca_dev *gspca_dev, s32 val)
 {
 	reg_w2(gspca_dev, R1C_AD_EXPOSE_TIMEL, val);
 	reg_w1(gspca_dev, R00_PART_CONTROL, LATENT_CHANGE | EXPO_CHANGE);
 						/* 0x84 */
 }

 static void setgain(struct gspca_dev *gspca_dev, s32 val)
 {
 	reg_w2(gspca_dev, R20_GAIN_G1L, val);
 	reg_w2(gspca_dev, R22_GAIN_RL, val);
 	reg_w2(gspca_dev, R24_GAIN_BL, val);
 	reg_w2(gspca_dev, R26_GAIN_G2L, val);
 }

 /* -- start the camera -- */
 static int sd_start(struct gspca_dev *gspca_dev)
 {
 	struct sd *sd = (struct sd *) gspca_dev;

 	reg_w1(gspca_dev, R0C_AD_WIDTHL, 0xe8);		/* 0x20; 0x0c */
 	reg_w1(gspca_dev, R0D_AD_WIDTHH, 0x03);

 	/************************************************/
 	reg_w1(gspca_dev, R28_QUANT, 0x90);
 					/* 0x72 compressed mode 0x28 */
 	if (gspca_dev->cam.cam_mode[(int) gspca_dev->curr_mode].priv) {
 		/* 176x144 */
 		reg_w1(gspca_dev, R29_LINE, 0x41);
 					/* CIF - 2 lines/packet */
 	} else {
 		/* 352x288 */
 		reg_w1(gspca_dev, R29_LINE, 0x81);
 					/* CIF - 2 lines/packet */
 	}
 	/************************************************/
 	reg_w1(gspca_dev, R2C_POLARITY, 0x10);		/* slow clock */
 	reg_w1(gspca_dev, R2D_POINT, 0x14);
 	reg_w1(gspca_dev, R2E_POINTH, 0x01);
 	reg_w1(gspca_dev, R2F_POINTB, 0x12);
 	reg_w1(gspca_dev, R30_POINTBH, 0x01);

 	tv_8532_setReg(gspca_dev);

 	/************************************************/
 	reg_w1(gspca_dev, R31_UPD, 0x01);	/* update registers */
 	msleep(200);
 	reg_w1(gspca_dev, R31_UPD, 0x00);	/* end update */

 	gspca_dev->empty_packet = 0;		/* check the empty packets */
 	sd->packet = 0;				/* ignore the first packets */

 	return 0;
 }

 static void sd_stopN(struct gspca_dev *gspca_dev)
 {
 	reg_w1(gspca_dev, R3B_Test3, 0x0b);	/* Test0Sel = 11 = GPIO */
 }

 static void sd_pkt_scan(struct gspca_dev *gspca_dev,
 			u8 *data,			/* isoc packet */
 			int len)			/* iso packet length */
 {
 	struct sd *sd = (struct sd *) gspca_dev;
 	int packet_type0, packet_type1;

 	packet_type0 = packet_type1 = INTER_PACKET;
 	if (gspca_dev->empty_packet) {
 		gspca_dev->empty_packet = 0;
 		sd->packet = gspca_dev->pixfmt.height / 2;
 		packet_type0 = FIRST_PACKET;
 	} else if (sd->packet == 0)
 		return;			/* 2 more lines in 352x288 ! */
 	sd->packet--;
 	if (sd->packet == 0)
 		packet_type1 = LAST_PACKET;

 	/* each packet contains:
 	 * - header 2 bytes
 	 * - RGRG line
 	 * - 4 bytes
 	 * - GBGB line
 	 * - 4 bytes
 	 */
 	gspca_frame_add(gspca_dev, packet_type0,
 			data + 2, gspca_dev->pixfmt.width);
 	gspca_frame_add(gspca_dev, packet_type1,
 			data + gspca_dev->pixfmt.width + 5,
 			gspca_dev->pixfmt.width);
 }

 static int sd_s_ctrl(struct v4l2_ctrl *ctrl)
 {
 	struct gspca_dev *gspca_dev =
 		container_of(ctrl->handler, struct gspca_dev, ctrl_handler);

 	gspca_dev->usb_err = 0;

 	if (!gspca_dev->streaming)
 		return 0;

 	switch (ctrl->id) {
 	case V4L2_CID_EXPOSURE:
 		setexposure(gspca_dev, ctrl->val);
 		break;
 	case V4L2_CID_GAIN:
 		setgain(gspca_dev, ctrl->val);
 		break;
 	}
 	return gspca_dev->usb_err;
 }

 static const struct v4l2_ctrl_ops sd_ctrl_ops = {
 	.s_ctrl = sd_s_ctrl,
 };

 static int sd_init_controls(struct gspca_dev *gspca_dev)
 {
 	struct v4l2_ctrl_handler *hdl = &gspca_dev->ctrl_handler;

 	gspca_dev->vdev.ctrl_handler = hdl;
 	v4l2_ctrl_handler_init(hdl, 2);
 	v4l2_ctrl_new_std(hdl, &sd_ctrl_ops,
 			V4L2_CID_EXPOSURE, 0, 0x18f, 1, 0x18f);
 	v4l2_ctrl_new_std(hdl, &sd_ctrl_ops,
 			V4L2_CID_GAIN, 0, 0x7ff, 1, 0x100);

 	if (hdl->error) {
 		pr_err("Could not initialize controls\n");
 		return hdl->error;
 	}
 	return 0;
 }

 /* sub-driver description */
 static const struct sd_desc sd_desc = {
 	.name = MODULE_NAME,
 	.config = sd_config,
 	.init = sd_init,
 	.init_controls = sd_init_controls,
 	.start = sd_start,
 	.stopN = sd_stopN,
 	.pkt_scan = sd_pkt_scan,
 };

 /* -- module initialisation -- */
 static const struct usb_device_id device_table[] = {
 	{USB_DEVICE(0x046d, 0x0920)},
 	{USB_DEVICE(0x046d, 0x0921)},
 	{USB_DEVICE(0x0545, 0x808b)},
 	{USB_DEVICE(0x0545, 0x8333)},
 	{USB_DEVICE(0x0923, 0x010f)},
 	{}
 };

 MODULE_DEVICE_TABLE(usb, device_table);

 /* -- device connect -- */
 static int sd_probe(struct usb_interface *intf,
 		    const struct usb_device_id *id)
 {
 	return gspca_dev_probe(intf, id, &sd_desc, sizeof(struct sd),
 			       THIS_MODULE);
 }

 static struct usb_driver sd_driver = {
 	.name = MODULE_NAME,
 	.id_table = device_table,
 	.probe = sd_probe,
 	.disconnect = gspca_disconnect,
 #ifdef CONFIG_PM
 	.suspend = gspca_suspend,
 	.resume = gspca_resume,
 	.reset_resume = gspca_resume,
 #endif
 };

 module_usb_driver(sd_driver);
	// SPDX-License-Identifier: GPL-2.0-or-later
	/*
	* Quickcam cameras initialization data
	*
	* V4L2 by Jean-Francois Moine <http://moinejf.free.fr>
	*/
	#define MODULE_NAME "tv8532"

	#include "gspca.h"

	MODULE_AUTHOR("Michel Xhaard <mxhaard@users.sourceforge.net>");
	MODULE_DESCRIPTION("TV8532 USB Camera Driver");
	MODULE_LICENSE("GPL");

	/* specific webcam descriptor */
	struct sd {
	struct gspca_dev gspca_dev; /* !! must be the first item */

	__u8 packet;
	};

	static const struct v4l2_pix_format sif_mode[] = {
	{176, 144, V4L2_PIX_FMT_SBGGR8, V4L2_FIELD_NONE,
	.bytesperline = 176,
	.sizeimage = 176 * 144,
	.colorspace = V4L2_COLORSPACE_SRGB,
	.priv = 1},
	{352, 288, V4L2_PIX_FMT_SBGGR8, V4L2_FIELD_NONE,
	.bytesperline = 352,
	.sizeimage = 352 * 288,
	.colorspace = V4L2_COLORSPACE_SRGB,
	.priv = 0},
	};

	/* TV-8532A (ICM532A) registers (LE) */
	#define R00_PART_CONTROL 0x00
	#define LATENT_CHANGE 0x80
	#define EXPO_CHANGE 0x04
	#define R01_TIMING_CONTROL_LOW 0x01
	#define CMD_EEprom_Open 0x30
	#define CMD_EEprom_Close 0x29
	#define R03_TABLE_ADDR 0x03
	#define R04_WTRAM_DATA_L 0x04
	#define R05_WTRAM_DATA_M 0x05
	#define R06_WTRAM_DATA_H 0x06
	#define R07_TABLE_LEN 0x07
	#define R08_RAM_WRITE_ACTION 0x08
	#define R0C_AD_WIDTHL 0x0c
	#define R0D_AD_WIDTHH 0x0d
	#define R0E_AD_HEIGHTL 0x0e
	#define R0F_AD_HEIGHTH 0x0f
	#define R10_AD_COL_BEGINL 0x10
	#define R11_AD_COL_BEGINH 0x11
	#define MIRROR 0x04 /* [10] */
	#define R14_AD_ROW_BEGINL 0x14
	#define R15_AD_ROWBEGINH 0x15
	#define R1C_AD_EXPOSE_TIMEL 0x1c
	#define R20_GAIN_G1L 0x20
	#define R21_GAIN_G1H 0x21
	#define R22_GAIN_RL 0x22
	#define R23_GAIN_RH 0x23
	#define R24_GAIN_BL 0x24
	#define R25_GAIN_BH 0x25
	#define R26_GAIN_G2L 0x26
	#define R27_GAIN_G2H 0x27
	#define R28_QUANT 0x28
	#define R29_LINE 0x29
	#define R2C_POLARITY 0x2c
	#define R2D_POINT 0x2d
	#define R2E_POINTH 0x2e
	#define R2F_POINTB 0x2f
	#define R30_POINTBH 0x30
	#define R31_UPD 0x31
	#define R2A_HIGH_BUDGET 0x2a
	#define R2B_LOW_BUDGET 0x2b
	#define R34_VID 0x34
	#define R35_VIDH 0x35
	#define R36_PID 0x36
	#define R37_PIDH 0x37
	#define R39_Test1 0x39 /* GPIO */
	#define R3B_Test3 0x3b /* GPIO */
	#define R83_AD_IDH 0x83
	#define R91_AD_SLOPEREG 0x91
	#define R94_AD_BITCONTROL 0x94

	static const u8 eeprom_data[][3] = {
	/* dataH dataM dataL */
	{0x01, 0x00, 0x01},
	{0x01, 0x80, 0x11},
	{0x05, 0x00, 0x14},
	{0x05, 0x00, 0x1c},
	{0x0d, 0x00, 0x1e},
	{0x05, 0x00, 0x1f},
	{0x05, 0x05, 0x19},
	{0x05, 0x01, 0x1b},
	{0x05, 0x09, 0x1e},
	{0x0d, 0x89, 0x2e},
	{0x05, 0x89, 0x2f},
	{0x05, 0x0d, 0xd9},
	{0x05, 0x09, 0xf1},
	};


	/* write 1 byte */
	static void reg_w1(struct gspca_dev *gspca_dev,
	__u16 index, __u8 value)
	{
	gspca_dev->usb_buf[0] = value;
	usb_control_msg(gspca_dev->dev,
	usb_sndctrlpipe(gspca_dev->dev, 0),
	0x02,
	USB_DIR_OUT \| USB_TYPE_VENDOR \| USB_RECIP_DEVICE,
	0, /* value */
	index, gspca_dev->usb_buf, 1, 500);
	}

	/* write 2 bytes */
	static void reg_w2(struct gspca_dev *gspca_dev,
	u16 index, u16 value)
	{
	gspca_dev->usb_buf[0] = value;
	gspca_dev->usb_buf[1] = value >> 8;
	usb_control_msg(gspca_dev->dev,
	usb_sndctrlpipe(gspca_dev->dev, 0),
	0x02,
	USB_DIR_OUT \| USB_TYPE_VENDOR \| USB_RECIP_DEVICE,
	0, /* value */
	index, gspca_dev->usb_buf, 2, 500);
	}

	static void tv_8532WriteEEprom(struct gspca_dev *gspca_dev)
	{
	int i;

	reg_w1(gspca_dev, R01_TIMING_CONTROL_LOW, CMD_EEprom_Open);
	for (i = 0; i < ARRAY_SIZE(eeprom_data); i++) {
	reg_w1(gspca_dev, R03_TABLE_ADDR, i);
	reg_w1(gspca_dev, R04_WTRAM_DATA_L, eeprom_data[i][2]);
	reg_w1(gspca_dev, R05_WTRAM_DATA_M, eeprom_data[i][1]);
	reg_w1(gspca_dev, R06_WTRAM_DATA_H, eeprom_data[i][0]);
	reg_w1(gspca_dev, R08_RAM_WRITE_ACTION, 0);
	}
	reg_w1(gspca_dev, R07_TABLE_LEN, i);
	reg_w1(gspca_dev, R01_TIMING_CONTROL_LOW, CMD_EEprom_Close);
	}

	/* this function is called at probe time */
	static int sd_config(struct gspca_dev *gspca_dev,
	const struct usb_device_id *id)
	{
	struct cam *cam;

	cam = &gspca_dev->cam;
	cam->cam_mode = sif_mode;
	cam->nmodes = ARRAY_SIZE(sif_mode);

	return 0;
	}

	static void tv_8532_setReg(struct gspca_dev *gspca_dev)
	{
	reg_w1(gspca_dev, R3B_Test3, 0x0a); /* Test0Sel = 10 */
	/******************************************************/
	reg_w1(gspca_dev, R0E_AD_HEIGHTL, 0x90);
	reg_w1(gspca_dev, R0F_AD_HEIGHTH, 0x01);
	reg_w2(gspca_dev, R1C_AD_EXPOSE_TIMEL, 0x018f);
	reg_w1(gspca_dev, R10_AD_COL_BEGINL, 0x44);
	/* begin active line */
	reg_w1(gspca_dev, R11_AD_COL_BEGINH, 0x00);
	/* mirror and digital gain */
	reg_w1(gspca_dev, R14_AD_ROW_BEGINL, 0x0a);

	reg_w1(gspca_dev, R94_AD_BITCONTROL, 0x02);
	reg_w1(gspca_dev, R91_AD_SLOPEREG, 0x00);
	reg_w1(gspca_dev, R00_PART_CONTROL, LATENT_CHANGE \| EXPO_CHANGE);
	/* = 0x84 */
	}

	/* this function is called at probe and resume time */
	static int sd_init(struct gspca_dev *gspca_dev)
	{
	tv_8532WriteEEprom(gspca_dev);

	return 0;
	}

	static void setexposure(struct gspca_dev *gspca_dev, s32 val)
	{
	reg_w2(gspca_dev, R1C_AD_EXPOSE_TIMEL, val);
	reg_w1(gspca_dev, R00_PART_CONTROL, LATENT_CHANGE \| EXPO_CHANGE);
	/* 0x84 */
	}

	static void setgain(struct gspca_dev *gspca_dev, s32 val)
	{
	reg_w2(gspca_dev, R20_GAIN_G1L, val);
	reg_w2(gspca_dev, R22_GAIN_RL, val);
	reg_w2(gspca_dev, R24_GAIN_BL, val);
	reg_w2(gspca_dev, R26_GAIN_G2L, val);
	}

	/* -- start the camera -- */
	static int sd_start(struct gspca_dev *gspca_dev)
	{
	struct sd sd = (struct sd ) gspca_dev;

	reg_w1(gspca_dev, R0C_AD_WIDTHL, 0xe8); /* 0x20; 0x0c */
	reg_w1(gspca_dev, R0D_AD_WIDTHH, 0x03);

	/************************************************/
	reg_w1(gspca_dev, R28_QUANT, 0x90);
	/* 0x72 compressed mode 0x28 */
	if (gspca_dev->cam.cam_mode[(int) gspca_dev->curr_mode].priv) {
	/* 176x144 */
	reg_w1(gspca_dev, R29_LINE, 0x41);
	/* CIF - 2 lines/packet */
	} else {
	/* 352x288 */
	reg_w1(gspca_dev, R29_LINE, 0x81);
	/* CIF - 2 lines/packet */
	}
	/************************************************/
	reg_w1(gspca_dev, R2C_POLARITY, 0x10); /* slow clock */
	reg_w1(gspca_dev, R2D_POINT, 0x14);
	reg_w1(gspca_dev, R2E_POINTH, 0x01);
	reg_w1(gspca_dev, R2F_POINTB, 0x12);
	reg_w1(gspca_dev, R30_POINTBH, 0x01);

	tv_8532_setReg(gspca_dev);

	/************************************************/
	reg_w1(gspca_dev, R31_UPD, 0x01); /* update registers */
	msleep(200);
	reg_w1(gspca_dev, R31_UPD, 0x00); /* end update */

	gspca_dev->empty_packet = 0; /* check the empty packets */
	sd->packet = 0; /* ignore the first packets */

	return 0;
	}

	static void sd_stopN(struct gspca_dev *gspca_dev)
	{
	reg_w1(gspca_dev, R3B_Test3, 0x0b); /* Test0Sel = 11 = GPIO */
	}

	static void sd_pkt_scan(struct gspca_dev *gspca_dev,
	u8 data, / isoc packet */
	int len) /* iso packet length */
	{
	struct sd sd = (struct sd ) gspca_dev;
	int packet_type0, packet_type1;

	packet_type0 = packet_type1 = INTER_PACKET;
	if (gspca_dev->empty_packet) {
	gspca_dev->empty_packet = 0;
	sd->packet = gspca_dev->pixfmt.height / 2;
	packet_type0 = FIRST_PACKET;
	} else if (sd->packet == 0)
	return; /* 2 more lines in 352x288 ! */
	sd->packet--;
	if (sd->packet == 0)
	packet_type1 = LAST_PACKET;

	/* each packet contains:
	* - header 2 bytes
	* - RGRG line
	* - 4 bytes
	* - GBGB line
	* - 4 bytes
	*/
	gspca_frame_add(gspca_dev, packet_type0,
	data + 2, gspca_dev->pixfmt.width);
	gspca_frame_add(gspca_dev, packet_type1,
	data + gspca_dev->pixfmt.width + 5,
	gspca_dev->pixfmt.width);
	}

	static int sd_s_ctrl(struct v4l2_ctrl *ctrl)
	{
	struct gspca_dev *gspca_dev =
	container_of(ctrl->handler, struct gspca_dev, ctrl_handler);

	gspca_dev->usb_err = 0;

	if (!gspca_dev->streaming)
	return 0;

	switch (ctrl->id) {
	case V4L2_CID_EXPOSURE:
	setexposure(gspca_dev, ctrl->val);
	break;
	case V4L2_CID_GAIN:
	setgain(gspca_dev, ctrl->val);
	break;
	}
	return gspca_dev->usb_err;
	}

	static const struct v4l2_ctrl_ops sd_ctrl_ops = {
	.s_ctrl = sd_s_ctrl,
	};

	static int sd_init_controls(struct gspca_dev *gspca_dev)
	{
	struct v4l2_ctrl_handler *hdl = &gspca_dev->ctrl_handler;

	gspca_dev->vdev.ctrl_handler = hdl;
	v4l2_ctrl_handler_init(hdl, 2);
	v4l2_ctrl_new_std(hdl, &sd_ctrl_ops,
	V4L2_CID_EXPOSURE, 0, 0x18f, 1, 0x18f);
	v4l2_ctrl_new_std(hdl, &sd_ctrl_ops,
	V4L2_CID_GAIN, 0, 0x7ff, 1, 0x100);

	if (hdl->error) {
	pr_err("Could not initialize controls\n");
	return hdl->error;
	}
	return 0;
	}

	/* sub-driver description */
	static const struct sd_desc sd_desc = {
	.name = MODULE_NAME,
	.config = sd_config,
	.init = sd_init,
	.init_controls = sd_init_controls,
	.start = sd_start,
	.stopN = sd_stopN,
	.pkt_scan = sd_pkt_scan,
	};

	/* -- module initialisation -- */
	static const struct usb_device_id device_table[] = {
	{USB_DEVICE(0x046d, 0x0920)},
	{USB_DEVICE(0x046d, 0x0921)},
	{USB_DEVICE(0x0545, 0x808b)},
	{USB_DEVICE(0x0545, 0x8333)},
	{USB_DEVICE(0x0923, 0x010f)},
	{}
	};

	MODULE_DEVICE_TABLE(usb, device_table);

	/* -- device connect -- */
	static int sd_probe(struct usb_interface *intf,
	const struct usb_device_id *id)
	{
	return gspca_dev_probe(intf, id, &sd_desc, sizeof(struct sd),
	THIS_MODULE);
	}

	static struct usb_driver sd_driver = {
	.name = MODULE_NAME,
	.id_table = device_table,
	.probe = sd_probe,
	.disconnect = gspca_disconnect,
	#ifdef CONFIG_PM
	.suspend = gspca_suspend,
	.resume = gspca_resume,
	.reset_resume = gspca_resume,
	#endif
	};

	module_usb_driver(sd_driver);