Initial import

1 files changed, 932 insertions, 0 deletions

diff --git a/drivers/media/usb/gspca/spca561.c b/drivers/media/usb/gspca/spca561.c
new file mode 100644
index 000000000..403d71cd6
--- /dev/null
+++ b/drivers/media/usb/gspca/spca561.c
@@ -0,0 +1,932 @@
+/*
+ * Sunplus spca561 subdriver
+ *
+ * Copyright (C) 2004 Michel Xhaard mxhaard@magic.fr
+ *
+ * V4L2 by Jean-Francois Moine <http://moinejf.free.fr>
+ *
+ * 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
+ * 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#define MODULE_NAME "spca561"
+
+#include <linux/input.h>
+#include "gspca.h"
+
+MODULE_AUTHOR("Michel Xhaard <mxhaard@users.sourceforge.net>");
+MODULE_DESCRIPTION("GSPCA/SPCA561 USB Camera Driver");
+MODULE_LICENSE("GPL");
+
+#define EXPOSURE_MAX (2047 + 325)
+
+/* specific webcam descriptor */
+struct sd {
+	struct gspca_dev gspca_dev;	/* !! must be the first item */
+
+	struct { /* hue/contrast control cluster */
+		struct v4l2_ctrl *contrast;
+		struct v4l2_ctrl *hue;
+	};
+	struct v4l2_ctrl *autogain;
+
+#define EXPO12A_DEF 3
+	__u8 expo12a;		/* expo/gain? for rev 12a */
+
+	__u8 chip_revision;
+#define Rev012A 0
+#define Rev072A 1
+
+	signed char ag_cnt;
+#define AG_CNT_START 13
+};
+
+static const struct v4l2_pix_format sif_012a_mode[] = {
+	{160, 120, V4L2_PIX_FMT_SGBRG8, V4L2_FIELD_NONE,
+		.bytesperline = 160,
+		.sizeimage = 160 * 120,
+		.colorspace = V4L2_COLORSPACE_SRGB,
+		.priv = 3},
+	{176, 144, V4L2_PIX_FMT_SGBRG8, V4L2_FIELD_NONE,
+		.bytesperline = 176,
+		.sizeimage = 176 * 144,
+		.colorspace = V4L2_COLORSPACE_SRGB,
+		.priv = 2},
+	{320, 240, V4L2_PIX_FMT_SPCA561, V4L2_FIELD_NONE,
+		.bytesperline = 320,
+		.sizeimage = 320 * 240 * 4 / 8,
+		.colorspace = V4L2_COLORSPACE_SRGB,
+		.priv = 1},
+	{352, 288, V4L2_PIX_FMT_SPCA561, V4L2_FIELD_NONE,
+		.bytesperline = 352,
+		.sizeimage = 352 * 288 * 4 / 8,
+		.colorspace = V4L2_COLORSPACE_SRGB,
+		.priv = 0},
+};
+
+static const struct v4l2_pix_format sif_072a_mode[] = {
+	{160, 120, V4L2_PIX_FMT_SGBRG8, V4L2_FIELD_NONE,
+		.bytesperline = 160,
+		.sizeimage = 160 * 120,
+		.colorspace = V4L2_COLORSPACE_SRGB,
+		.priv = 3},
+	{176, 144, V4L2_PIX_FMT_SGBRG8, V4L2_FIELD_NONE,
+		.bytesperline = 176,
+		.sizeimage = 176 * 144,
+		.colorspace = V4L2_COLORSPACE_SRGB,
+		.priv = 2},
+	{320, 240, V4L2_PIX_FMT_SGBRG8, V4L2_FIELD_NONE,
+		.bytesperline = 320,
+		.sizeimage = 320 * 240,
+		.colorspace = V4L2_COLORSPACE_SRGB,
+		.priv = 1},
+	{352, 288, V4L2_PIX_FMT_SGBRG8, V4L2_FIELD_NONE,
+		.bytesperline = 352,
+		.sizeimage = 352 * 288,
+		.colorspace = V4L2_COLORSPACE_SRGB,
+		.priv = 0},
+};
+
+/*
+ * Initialization data
+ * I'm not very sure how to split initialization from open data
+ * chunks. For now, we'll consider everything as initialization
+ */
+/* Frame packet header offsets for the spca561 */
+#define SPCA561_OFFSET_SNAP 1
+#define SPCA561_OFFSET_TYPE 2
+#define SPCA561_OFFSET_COMPRESS 3
+#define SPCA561_OFFSET_FRAMSEQ   4
+#define SPCA561_OFFSET_GPIO 5
+#define SPCA561_OFFSET_USBBUFF 6
+#define SPCA561_OFFSET_WIN2GRAVE 7
+#define SPCA561_OFFSET_WIN2RAVE 8
+#define SPCA561_OFFSET_WIN2BAVE 9
+#define SPCA561_OFFSET_WIN2GBAVE 10
+#define SPCA561_OFFSET_WIN1GRAVE 11
+#define SPCA561_OFFSET_WIN1RAVE 12
+#define SPCA561_OFFSET_WIN1BAVE 13
+#define SPCA561_OFFSET_WIN1GBAVE 14
+#define SPCA561_OFFSET_FREQ 15
+#define SPCA561_OFFSET_VSYNC 16
+#define SPCA561_INDEX_I2C_BASE 0x8800
+#define SPCA561_SNAPBIT 0x20
+#define SPCA561_SNAPCTRL 0x40
+
+static const u16 rev72a_reset[][2] = {
+	{0x0000, 0x8114},	/* Software GPIO output data */
+	{0x0001, 0x8114},	/* Software GPIO output data */
+	{0x0000, 0x8112},	/* Some kind of reset */
+	{}
+};
+static const __u16 rev72a_init_data1[][2] = {
+	{0x0003, 0x8701},	/* PCLK clock delay adjustment */
+	{0x0001, 0x8703},	/* HSYNC from cmos inverted */
+	{0x0011, 0x8118},	/* Enable and conf sensor */
+	{0x0001, 0x8118},	/* Conf sensor */
+	{0x0092, 0x8804},	/* I know nothing about these */
+	{0x0010, 0x8802},	/* 0x88xx registers, so I won't */
+	{}
+};
+static const u16 rev72a_init_sensor1[][2] = {
+	{0x0001, 0x000d},
+	{0x0002, 0x0018},
+	{0x0004, 0x0165},
+	{0x0005, 0x0021},
+	{0x0007, 0x00aa},
+	{0x0020, 0x1504},
+	{0x0039, 0x0002},
+	{0x0035, 0x0010},
+	{0x0009, 0x1049},
+	{0x0028, 0x000b},
+	{0x003b, 0x000f},
+	{0x003c, 0x0000},
+	{}
+};
+static const __u16 rev72a_init_data2[][2] = {
+	{0x0018, 0x8601},	/* Pixel/line selection for color separation */
+	{0x0000, 0x8602},	/* Optical black level for user setting */
+	{0x0060, 0x8604},	/* Optical black horizontal offset */
+	{0x0002, 0x8605},	/* Optical black vertical offset */
+	{0x0000, 0x8603},	/* Non-automatic optical black level */
+	{0x0002, 0x865b},	/* Horizontal offset for valid pixels */
+	{0x0000, 0x865f},	/* Vertical valid pixels window (x2) */
+	{0x00b0, 0x865d},	/* Horizontal valid pixels window (x2) */
+	{0x0090, 0x865e},	/* Vertical valid lines window (x2) */
+	{0x00e0, 0x8406},	/* Memory buffer threshold */
+	{0x0000, 0x8660},	/* Compensation memory stuff */
+	{0x0002, 0x8201},	/* Output address for r/w serial EEPROM */
+	{0x0008, 0x8200},	/* Clear valid bit for serial EEPROM */
+	{0x0001, 0x8200},	/* OprMode to be executed by hardware */
+/* from ms-win */
+	{0x0000, 0x8611},	/* R offset for white balance */
+	{0x00fd, 0x8612},	/* Gr offset for white balance */
+	{0x0003, 0x8613},	/* B offset for white balance */
+	{0x0000, 0x8614},	/* Gb offset for white balance */
+/* from ms-win */
+	{0x0035, 0x8651},	/* R gain for white balance */
+	{0x0040, 0x8652},	/* Gr gain for white balance */
+	{0x005f, 0x8653},	/* B gain for white balance */
+	{0x0040, 0x8654},	/* Gb gain for white balance */
+	{0x0002, 0x8502},	/* Maximum average bit rate stuff */
+	{0x0011, 0x8802},
+
+	{0x0087, 0x8700},	/* Set master clock (96Mhz????) */
+	{0x0081, 0x8702},	/* Master clock output enable */
+
+	{0x0000, 0x8500},	/* Set image type (352x288 no compression) */
+	/* Originally was 0x0010 (352x288 compression) */
+
+	{0x0002, 0x865b},	/* Horizontal offset for valid pixels */
+	{0x0003, 0x865c},	/* Vertical offset for valid lines */
+	{}
+};
+static const u16 rev72a_init_sensor2[][2] = {
+	{0x0003, 0x0121},
+	{0x0004, 0x0165},
+	{0x0005, 0x002f},	/* blanking control column */
+	{0x0006, 0x0000},	/* blanking mode row*/
+	{0x000a, 0x0002},
+	{0x0009, 0x1061},	/* setexposure times && pixel clock
+				 * 0001 0 | 000 0110 0001 */
+	{0x0035, 0x0014},
+	{}
+};
+
+/******************** QC Express etch2 stuff ********************/
+static const __u16 Pb100_1map8300[][2] = {
+	/* reg, value */
+	{0x8320, 0x3304},
+
+	{0x8303, 0x0125},	/* image area */
+	{0x8304, 0x0169},
+	{0x8328, 0x000b},
+	{0x833c, 0x0001},		/*fixme: win:07*/
+
+	{0x832f, 0x1904},		/*fixme: was 0419*/
+	{0x8307, 0x00aa},
+	{0x8301, 0x0003},
+	{0x8302, 0x000e},
+	{}
+};
+static const __u16 Pb100_2map8300[][2] = {
+	/* reg, value */
+	{0x8339, 0x0000},
+	{0x8307, 0x00aa},
+	{}
+};
+
+static const __u16 spca561_161rev12A_data1[][2] = {
+	{0x29, 0x8118},		/* Control register (various enable bits) */
+	{0x08, 0x8114},		/* GPIO: Led off */
+	{0x0e, 0x8112},		/* 0x0e stream off 0x3e stream on */
+	{0x00, 0x8102},		/* white balance - new */
+	{0x92, 0x8804},
+	{0x04, 0x8802},		/* windows uses 08 */
+	{}
+};
+static const __u16 spca561_161rev12A_data2[][2] = {
+	{0x21, 0x8118},
+	{0x10, 0x8500},
+	{0x07, 0x8601},
+	{0x07, 0x8602},
+	{0x04, 0x8501},
+
+	{0x07, 0x8201},		/* windows uses 02 */
+	{0x08, 0x8200},
+	{0x01, 0x8200},
+
+	{0x90, 0x8604},
+	{0x00, 0x8605},
+	{0xb0, 0x8603},
+
+	/* sensor gains */
+	{0x07, 0x8601},		/* white balance - new */
+	{0x07, 0x8602},		/* white balance - new */
+	{0x00, 0x8610},		/* *red */
+	{0x00, 0x8611},		/* 3f   *green */
+	{0x00, 0x8612},		/* green *blue */
+	{0x00, 0x8613},		/* blue *green */
+	{0x43, 0x8614},		/* green *red - white balance - was 0x35 */
+	{0x40, 0x8615},		/* 40   *green - white balance - was 0x35 */
+	{0x71, 0x8616},		/* 7a   *blue - white balance - was 0x35 */
+	{0x40, 0x8617},		/* 40   *green - white balance - was 0x35 */
+
+	{0x0c, 0x8620},		/* 0c */
+	{0xc8, 0x8631},		/* c8 */
+	{0xc8, 0x8634},		/* c8 */
+	{0x23, 0x8635},		/* 23 */
+	{0x1f, 0x8636},		/* 1f */
+	{0xdd, 0x8637},		/* dd */
+	{0xe1, 0x8638},		/* e1 */
+	{0x1d, 0x8639},		/* 1d */
+	{0x21, 0x863a},		/* 21 */
+	{0xe3, 0x863b},		/* e3 */
+	{0xdf, 0x863c},		/* df */
+	{0xf0, 0x8505},
+	{0x32, 0x850a},
+/*	{0x99, 0x8700},		 * - white balance - new (removed) */
+	/* HDG we used to do this in stop0, making the init state and the state
+	   after a start / stop different, so do this here instead. */
+	{0x29, 0x8118},
+	{}
+};
+
+static void reg_w_val(struct gspca_dev *gspca_dev, __u16 index, __u8 value)
+{
+	int ret;
+	struct usb_device *dev = gspca_dev->dev;
+
+	ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
+			      0,		/* request */
+			      USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
+			      value, index, NULL, 0, 500);
+	PDEBUG(D_USBO, "reg write: 0x%02x:0x%02x", index, value);
+	if (ret < 0)
+		pr_err("reg write: error %d\n", ret);
+}
+
+static void write_vector(struct gspca_dev *gspca_dev,
+			const __u16 data[][2])
+{
+	int i;
+
+	i = 0;
+	while (data[i][1] != 0) {
+		reg_w_val(gspca_dev, data[i][1], data[i][0]);
+		i++;
+	}
+}
+
+/* read 'len' bytes to gspca_dev->usb_buf */
+static void reg_r(struct gspca_dev *gspca_dev,
+		  __u16 index, __u16 length)
+{
+	usb_control_msg(gspca_dev->dev,
+			usb_rcvctrlpipe(gspca_dev->dev, 0),
+			0,			/* request */
+			USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
+			0,			/* value */
+			index, gspca_dev->usb_buf, length, 500);
+}
+
+/* write 'len' bytes from gspca_dev->usb_buf */
+static void reg_w_buf(struct gspca_dev *gspca_dev,
+		      __u16 index, __u16 len)
+{
+	usb_control_msg(gspca_dev->dev,
+			usb_sndctrlpipe(gspca_dev->dev, 0),
+			0,			/* request */
+			USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
+			0,			/* value */
+			index, gspca_dev->usb_buf, len, 500);
+}
+
+static void i2c_write(struct gspca_dev *gspca_dev, __u16 value, __u16 reg)
+{
+	int retry = 60;
+
+	reg_w_val(gspca_dev, 0x8801, reg);
+	reg_w_val(gspca_dev, 0x8805, value);
+	reg_w_val(gspca_dev, 0x8800, value >> 8);
+	do {
+		reg_r(gspca_dev, 0x8803, 1);
+		if (!gspca_dev->usb_buf[0])
+			return;
+		msleep(10);
+	} while (--retry);
+}
+
+static int i2c_read(struct gspca_dev *gspca_dev, __u16 reg, __u8 mode)
+{
+	int retry = 60;
+	__u8 value;
+
+	reg_w_val(gspca_dev, 0x8804, 0x92);
+	reg_w_val(gspca_dev, 0x8801, reg);
+	reg_w_val(gspca_dev, 0x8802, mode | 0x01);
+	do {
+		reg_r(gspca_dev, 0x8803, 1);
+		if (!gspca_dev->usb_buf[0]) {
+			reg_r(gspca_dev, 0x8800, 1);
+			value = gspca_dev->usb_buf[0];
+			reg_r(gspca_dev, 0x8805, 1);
+			return ((int) value << 8) | gspca_dev->usb_buf[0];
+		}
+		msleep(10);
+	} while (--retry);
+	return -1;
+}
+
+static void sensor_mapwrite(struct gspca_dev *gspca_dev,
+			    const __u16 (*sensormap)[2])
+{
+	while ((*sensormap)[0]) {
+		gspca_dev->usb_buf[0] = (*sensormap)[1];
+		gspca_dev->usb_buf[1] = (*sensormap)[1] >> 8;
+		reg_w_buf(gspca_dev, (*sensormap)[0], 2);
+		sensormap++;
+	}
+}
+
+static void write_sensor_72a(struct gspca_dev *gspca_dev,
+			    const __u16 (*sensor)[2])
+{
+	while ((*sensor)[0]) {
+		i2c_write(gspca_dev, (*sensor)[1], (*sensor)[0]);
+		sensor++;
+	}
+}
+
+static void init_161rev12A(struct gspca_dev *gspca_dev)
+{
+	write_vector(gspca_dev, spca561_161rev12A_data1);
+	sensor_mapwrite(gspca_dev, Pb100_1map8300);
+/*fixme: should be in sd_start*/
+	write_vector(gspca_dev, spca561_161rev12A_data2);
+	sensor_mapwrite(gspca_dev, Pb100_2map8300);
+}
+
+/* this function is called at probe time */
+static int sd_config(struct gspca_dev *gspca_dev,
+		     const struct usb_device_id *id)
+{
+	struct sd *sd = (struct sd *) gspca_dev;
+	struct cam *cam;
+	__u16 vendor, product;
+	__u8 data1, data2;
+
+	/* Read frm global register the USB product and vendor IDs, just to
+	 * prove that we can communicate with the device.  This works, which
+	 * confirms at we are communicating properly and that the device
+	 * is a 561. */
+	reg_r(gspca_dev, 0x8104, 1);
+	data1 = gspca_dev->usb_buf[0];
+	reg_r(gspca_dev, 0x8105, 1);
+	data2 = gspca_dev->usb_buf[0];
+	vendor = (data2 << 8) | data1;
+	reg_r(gspca_dev, 0x8106, 1);
+	data1 = gspca_dev->usb_buf[0];
+	reg_r(gspca_dev, 0x8107, 1);
+	data2 = gspca_dev->usb_buf[0];
+	product = (data2 << 8) | data1;
+	if (vendor != id->idVendor || product != id->idProduct) {
+		PDEBUG(D_PROBE, "Bad vendor / product from device");
+		return -EINVAL;
+	}
+
+	cam = &gspca_dev->cam;
+	cam->needs_full_bandwidth = 1;
+
+	sd->chip_revision = id->driver_info;
+	if (sd->chip_revision == Rev012A) {
+		cam->cam_mode = sif_012a_mode;
+		cam->nmodes = ARRAY_SIZE(sif_012a_mode);
+	} else {
+		cam->cam_mode = sif_072a_mode;
+		cam->nmodes = ARRAY_SIZE(sif_072a_mode);
+	}
+	sd->expo12a = EXPO12A_DEF;
+	return 0;
+}
+
+/* this function is called at probe and resume time */
+static int sd_init_12a(struct gspca_dev *gspca_dev)
+{
+	PDEBUG(D_STREAM, "Chip revision: 012a");
+	init_161rev12A(gspca_dev);
+	return 0;
+}
+static int sd_init_72a(struct gspca_dev *gspca_dev)
+{
+	PDEBUG(D_STREAM, "Chip revision: 072a");
+	write_vector(gspca_dev, rev72a_reset);
+	msleep(200);
+	write_vector(gspca_dev, rev72a_init_data1);
+	write_sensor_72a(gspca_dev, rev72a_init_sensor1);
+	write_vector(gspca_dev, rev72a_init_data2);
+	write_sensor_72a(gspca_dev, rev72a_init_sensor2);
+	reg_w_val(gspca_dev, 0x8112, 0x30);
+	return 0;
+}
+
+static void setbrightness(struct gspca_dev *gspca_dev, s32 val)
+{
+	struct sd *sd = (struct sd *) gspca_dev;
+	__u16 reg;
+
+	if (sd->chip_revision == Rev012A)
+		reg = 0x8610;
+	else
+		reg = 0x8611;
+
+	reg_w_val(gspca_dev, reg + 0, val);		/* R */
+	reg_w_val(gspca_dev, reg + 1, val);		/* Gr */
+	reg_w_val(gspca_dev, reg + 2, val);		/* B */
+	reg_w_val(gspca_dev, reg + 3, val);		/* Gb */
+}
+
+static void setwhite(struct gspca_dev *gspca_dev, s32 white, s32 contrast)
+{
+	struct sd *sd = (struct sd *) gspca_dev;
+	__u8 blue, red;
+	__u16 reg;
+
+	/* try to emulate MS-win as possible */
+	red = 0x20 + white * 3 / 8;
+	blue = 0x90 - white * 5 / 8;
+	if (sd->chip_revision == Rev012A) {
+		reg = 0x8614;
+	} else {
+		reg = 0x8651;
+		red += contrast - 0x20;
+		blue += contrast - 0x20;
+		reg_w_val(gspca_dev, 0x8652, contrast + 0x20); /* Gr */
+		reg_w_val(gspca_dev, 0x8654, contrast + 0x20); /* Gb */
+	}
+	reg_w_val(gspca_dev, reg, red);
+	reg_w_val(gspca_dev, reg + 2, blue);
+}
+
+/* rev 12a only */
+static void setexposure(struct gspca_dev *gspca_dev, s32 val)
+{
+	int i, expo = 0;
+
+	/* Register 0x8309 controls exposure for the spca561,
+	   the basic exposure setting goes from 1-2047, where 1 is completely
+	   dark and 2047 is very bright. It not only influences exposure but
+	   also the framerate (to allow for longer exposure) from 1 - 300 it
+	   only raises the exposure time then from 300 - 600 it halves the
+	   framerate to be able to further raise the exposure time and for every
+	   300 more it halves the framerate again. This allows for a maximum
+	   exposure time of circa 0.2 - 0.25 seconds (30 / (2000/3000) fps).
+	   Sometimes this is not enough, the 1-2047 uses bits 0-10, bits 11-12
+	   configure a divider for the base framerate which us used at the
+	   exposure setting of 1-300. These bits configure the base framerate
+	   according to the following formula: fps = 60 / (value + 2) */
+
+	/* We choose to use the high bits setting the fixed framerate divisor
+	   asap, as setting high basic exposure setting without the fixed
+	   divider in combination with high gains makes the cam stop */
+	int table[] =  { 0, 450, 550, 625, EXPOSURE_MAX };
+
+	for (i = 0; i < ARRAY_SIZE(table) - 1; i++) {
+		if (val <= table[i + 1]) {
+			expo  = val - table[i];
+			if (i)
+				expo += 300;
+			expo |= i << 11;
+			break;
+		}
+	}
+
+	gspca_dev->usb_buf[0] = expo;
+	gspca_dev->usb_buf[1] = expo >> 8;
+	reg_w_buf(gspca_dev, 0x8309, 2);
+}
+
+/* rev 12a only */
+static void setgain(struct gspca_dev *gspca_dev, s32 val)
+{
+	/* gain reg low 6 bits  0-63 gain, bit 6 and 7, both double the
+	   sensitivity when set, so 31 + one of them set == 63, and 15
+	   with both of them set == 63 */
+	if (val < 64)
+		gspca_dev->usb_buf[0] = val;
+	else if (val < 128)
+		gspca_dev->usb_buf[0] = (val / 2) | 0x40;
+	else
+		gspca_dev->usb_buf[0] = (val / 4) | 0xc0;
+
+	gspca_dev->usb_buf[1] = 0;
+	reg_w_buf(gspca_dev, 0x8335, 2);
+}
+
+static void setautogain(struct gspca_dev *gspca_dev, s32 val)
+{
+	struct sd *sd = (struct sd *) gspca_dev;
+
+	if (val)
+		sd->ag_cnt = AG_CNT_START;
+	else
+		sd->ag_cnt = -1;
+}
+
+static int sd_start_12a(struct gspca_dev *gspca_dev)
+{
+	int mode;
+	static const __u8 Reg8391[8] =
+		{0x92, 0x30, 0x20, 0x00, 0x0c, 0x00, 0x00, 0x00};
+
+	mode = gspca_dev->cam.cam_mode[(int) gspca_dev->curr_mode].priv;
+	if (mode <= 1) {
+		/* Use compression on 320x240 and above */
+		reg_w_val(gspca_dev, 0x8500, 0x10 | mode);
+	} else {
+		/* I couldn't get the compression to work below 320x240
+		 * Fortunately at these resolutions the bandwidth
+		 * is sufficient to push raw frames at ~20fps */
+		reg_w_val(gspca_dev, 0x8500, mode);
+	}		/* -- qq@kuku.eu.org */
+
+	gspca_dev->usb_buf[0] = 0xaa;
+	gspca_dev->usb_buf[1] = 0x00;
+	reg_w_buf(gspca_dev, 0x8307, 2);
+	/* clock - lower 0x8X values lead to fps > 30 */
+	reg_w_val(gspca_dev, 0x8700, 0x8a);
+					/* 0x8f 0x85 0x27 clock */
+	reg_w_val(gspca_dev, 0x8112, 0x1e | 0x20);
+	reg_w_val(gspca_dev, 0x850b, 0x03);
+	memcpy(gspca_dev->usb_buf, Reg8391, 8);
+	reg_w_buf(gspca_dev, 0x8391, 8);
+	reg_w_buf(gspca_dev, 0x8390, 8);
+
+	/* Led ON (bit 3 -> 0 */
+	reg_w_val(gspca_dev, 0x8114, 0x00);
+	return 0;
+}
+static int sd_start_72a(struct gspca_dev *gspca_dev)
+{
+	struct sd *sd = (struct sd *) gspca_dev;
+	int Clck;
+	int mode;
+
+	write_vector(gspca_dev, rev72a_reset);
+	msleep(200);
+	write_vector(gspca_dev, rev72a_init_data1);
+	write_sensor_72a(gspca_dev, rev72a_init_sensor1);
+
+	mode = gspca_dev->cam.cam_mode[(int) gspca_dev->curr_mode].priv;
+	switch (mode) {
+	default:
+	case 0:
+		Clck = 0x27;		/* ms-win 0x87 */
+		break;
+	case 1:
+		Clck = 0x25;
+		break;
+	case 2:
+		Clck = 0x22;
+		break;
+	case 3:
+		Clck = 0x21;
+		break;
+	}
+	reg_w_val(gspca_dev, 0x8700, Clck);	/* 0x27 clock */
+	reg_w_val(gspca_dev, 0x8702, 0x81);
+	reg_w_val(gspca_dev, 0x8500, mode);	/* mode */
+	write_sensor_72a(gspca_dev, rev72a_init_sensor2);
+	setwhite(gspca_dev, v4l2_ctrl_g_ctrl(sd->hue),
+			v4l2_ctrl_g_ctrl(sd->contrast));
+/*	setbrightness(gspca_dev);	 * fixme: bad values */
+	setautogain(gspca_dev, v4l2_ctrl_g_ctrl(sd->autogain));
+	reg_w_val(gspca_dev, 0x8112, 0x10 | 0x20);
+	return 0;
+}
+
+static void sd_stopN(struct gspca_dev *gspca_dev)
+{
+	struct sd *sd = (struct sd *) gspca_dev;
+
+	if (sd->chip_revision == Rev012A) {
+		reg_w_val(gspca_dev, 0x8112, 0x0e);
+		/* Led Off (bit 3 -> 1 */
+		reg_w_val(gspca_dev, 0x8114, 0x08);
+	} else {
+		reg_w_val(gspca_dev, 0x8112, 0x20);
+/*		reg_w_val(gspca_dev, 0x8102, 0x00); ?? */
+	}
+}
+
+static void do_autogain(struct gspca_dev *gspca_dev)
+{
+	struct sd *sd = (struct sd *) gspca_dev;
+	int expotimes;
+	int pixelclk;
+	int gainG;
+	__u8 R, Gr, Gb, B;
+	int y;
+	__u8 luma_mean = 110;
+	__u8 luma_delta = 20;
+	__u8 spring = 4;
+
+	if (sd->ag_cnt < 0)
+		return;
+	if (--sd->ag_cnt >= 0)
+		return;
+	sd->ag_cnt = AG_CNT_START;
+
+	switch (sd->chip_revision) {
+	case Rev072A:
+		reg_r(gspca_dev, 0x8621, 1);
+		Gr = gspca_dev->usb_buf[0];
+		reg_r(gspca_dev, 0x8622, 1);
+		R = gspca_dev->usb_buf[0];
+		reg_r(gspca_dev, 0x8623, 1);
+		B = gspca_dev->usb_buf[0];
+		reg_r(gspca_dev, 0x8624, 1);
+		Gb = gspca_dev->usb_buf[0];
+		y = (77 * R + 75 * (Gr + Gb) + 29 * B) >> 8;
+		/* u= (128*B-(43*(Gr+Gb+R))) >> 8; */
+		/* v= (128*R-(53*(Gr+Gb))-21*B) >> 8; */
+		/* PDEBUG(D_CONF,"reading Y %d U %d V %d ",y,u,v); */
+
+		if (y < luma_mean - luma_delta ||
+		    y > luma_mean + luma_delta) {
+			expotimes = i2c_read(gspca_dev, 0x09, 0x10);
+			pixelclk = 0x0800;
+			expotimes = expotimes & 0x07ff;
+			/* PDEBUG(D_PACK,
+				"Exposition Times 0x%03X Clock 0x%04X ",
+				expotimes,pixelclk); */
+			gainG = i2c_read(gspca_dev, 0x35, 0x10);
+			/* PDEBUG(D_PACK,
+				"reading Gain register %d", gainG); */
+
+			expotimes += (luma_mean - y) >> spring;
+			gainG += (luma_mean - y) / 50;
+			/* PDEBUG(D_PACK,
+				"compute expotimes %d gain %d",
+				expotimes,gainG); */
+
+			if (gainG > 0x3f)
+				gainG = 0x3f;
+			else if (gainG < 3)
+				gainG = 3;
+			i2c_write(gspca_dev, gainG, 0x35);
+
+			if (expotimes > 0x0256)
+				expotimes = 0x0256;
+			else if (expotimes < 3)
+				expotimes = 3;
+			i2c_write(gspca_dev, expotimes | pixelclk, 0x09);
+		}
+		break;
+	}
+}
+
+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;
+
+	len--;
+	switch (*data++) {			/* sequence number */
+	case 0:					/* start of frame */
+		gspca_frame_add(gspca_dev, LAST_PACKET, NULL, 0);
+
+		/* This should never happen */
+		if (len < 2) {
+			PERR("Short SOF packet, ignoring");
+			gspca_dev->last_packet_type = DISCARD_PACKET;
+			return;
+		}
+
+#if IS_ENABLED(CONFIG_INPUT)
+		if (data[0] & 0x20) {
+			input_report_key(gspca_dev->input_dev, KEY_CAMERA, 1);
+			input_sync(gspca_dev->input_dev);
+			input_report_key(gspca_dev->input_dev, KEY_CAMERA, 0);
+			input_sync(gspca_dev->input_dev);
+		}
+#endif
+
+		if (data[1] & 0x10) {
+			/* compressed bayer */
+			gspca_frame_add(gspca_dev, FIRST_PACKET, data, len);
+		} else {
+			/* raw bayer (with a header, which we skip) */
+			if (sd->chip_revision == Rev012A) {
+				data += 20;
+				len -= 20;
+			} else {
+				data += 16;
+				len -= 16;
+			}
+			gspca_frame_add(gspca_dev, FIRST_PACKET, data, len);
+		}
+		return;
+	case 0xff:			/* drop (empty mpackets) */
+		return;
+	}
+	gspca_frame_add(gspca_dev, INTER_PACKET, data, len);
+}
+
+static int sd_s_ctrl(struct v4l2_ctrl *ctrl)
+{
+	struct gspca_dev *gspca_dev =
+		container_of(ctrl->handler, struct gspca_dev, ctrl_handler);
+	struct sd *sd = (struct sd *)gspca_dev;
+
+	gspca_dev->usb_err = 0;
+
+	if (!gspca_dev->streaming)
+		return 0;
+
+	switch (ctrl->id) {
+	case V4L2_CID_BRIGHTNESS:
+		setbrightness(gspca_dev, ctrl->val);
+		break;
+	case V4L2_CID_CONTRAST:
+		/* hue/contrast control cluster for 72a */
+		setwhite(gspca_dev, sd->hue->val, ctrl->val);
+		break;
+	case V4L2_CID_HUE:
+		/* just plain hue control for 12a */
+		setwhite(gspca_dev, ctrl->val, 0);
+		break;
+	case V4L2_CID_EXPOSURE:
+		setexposure(gspca_dev, ctrl->val);
+		break;
+	case V4L2_CID_GAIN:
+		setgain(gspca_dev, ctrl->val);
+		break;
+	case V4L2_CID_AUTOGAIN:
+		setautogain(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_12a(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, 3);
+	v4l2_ctrl_new_std(hdl, &sd_ctrl_ops,
+			V4L2_CID_HUE, 1, 0x7f, 1, 0x40);
+	v4l2_ctrl_new_std(hdl, &sd_ctrl_ops,
+			V4L2_CID_BRIGHTNESS, -128, 127, 1, 0);
+	v4l2_ctrl_new_std(hdl, &sd_ctrl_ops,
+			V4L2_CID_EXPOSURE, 1, EXPOSURE_MAX, 1, 700);
+	v4l2_ctrl_new_std(hdl, &sd_ctrl_ops,
+			V4L2_CID_GAIN, 0, 255, 1, 63);
+
+	if (hdl->error) {
+		pr_err("Could not initialize controls\n");
+		return hdl->error;
+	}
+	return 0;
+}
+
+static int sd_init_controls_72a(struct gspca_dev *gspca_dev)
+{
+	struct sd *sd = (struct sd *)gspca_dev;
+	struct v4l2_ctrl_handler *hdl = &gspca_dev->ctrl_handler;
+
+	gspca_dev->vdev.ctrl_handler = hdl;
+	v4l2_ctrl_handler_init(hdl, 4);
+	sd->contrast = v4l2_ctrl_new_std(hdl, &sd_ctrl_ops,
+			V4L2_CID_CONTRAST, 0, 0x3f, 1, 0x20);
+	sd->hue = v4l2_ctrl_new_std(hdl, &sd_ctrl_ops,
+			V4L2_CID_HUE, 1, 0x7f, 1, 0x40);
+	v4l2_ctrl_new_std(hdl, &sd_ctrl_ops,
+			V4L2_CID_BRIGHTNESS, 0, 0x3f, 1, 0x20);
+	sd->autogain = v4l2_ctrl_new_std(hdl, &sd_ctrl_ops,
+			V4L2_CID_AUTOGAIN, 0, 1, 1, 1);
+
+	if (hdl->error) {
+		pr_err("Could not initialize controls\n");
+		return hdl->error;
+	}
+	v4l2_ctrl_cluster(2, &sd->contrast);
+	return 0;
+}
+
+/* sub-driver description */
+static const struct sd_desc sd_desc_12a = {
+	.name = MODULE_NAME,
+	.init_controls = sd_init_controls_12a,
+	.config = sd_config,
+	.init = sd_init_12a,
+	.start = sd_start_12a,
+	.stopN = sd_stopN,
+	.pkt_scan = sd_pkt_scan,
+#if IS_ENABLED(CONFIG_INPUT)
+	.other_input = 1,
+#endif
+};
+static const struct sd_desc sd_desc_72a = {
+	.name = MODULE_NAME,
+	.init_controls = sd_init_controls_72a,
+	.config = sd_config,
+	.init = sd_init_72a,
+	.start = sd_start_72a,
+	.stopN = sd_stopN,
+	.pkt_scan = sd_pkt_scan,
+	.dq_callback = do_autogain,
+#if IS_ENABLED(CONFIG_INPUT)
+	.other_input = 1,
+#endif
+};
+static const struct sd_desc *sd_desc[2] = {
+	&sd_desc_12a,
+	&sd_desc_72a
+};
+
+/* -- module initialisation -- */
+static const struct usb_device_id device_table[] = {
+	{USB_DEVICE(0x041e, 0x401a), .driver_info = Rev072A},
+	{USB_DEVICE(0x041e, 0x403b), .driver_info = Rev012A},
+	{USB_DEVICE(0x0458, 0x7004), .driver_info = Rev072A},
+	{USB_DEVICE(0x0461, 0x0815), .driver_info = Rev072A},
+	{USB_DEVICE(0x046d, 0x0928), .driver_info = Rev012A},
+	{USB_DEVICE(0x046d, 0x0929), .driver_info = Rev012A},
+	{USB_DEVICE(0x046d, 0x092a), .driver_info = Rev012A},
+	{USB_DEVICE(0x046d, 0x092b), .driver_info = Rev012A},
+	{USB_DEVICE(0x046d, 0x092c), .driver_info = Rev012A},
+	{USB_DEVICE(0x046d, 0x092d), .driver_info = Rev012A},
+	{USB_DEVICE(0x046d, 0x092e), .driver_info = Rev012A},
+	{USB_DEVICE(0x046d, 0x092f), .driver_info = Rev012A},
+	{USB_DEVICE(0x04fc, 0x0561), .driver_info = Rev072A},
+	{USB_DEVICE(0x060b, 0xa001), .driver_info = Rev072A},
+	{USB_DEVICE(0x10fd, 0x7e50), .driver_info = Rev072A},
+	{USB_DEVICE(0xabcd, 0xcdee), .driver_info = Rev072A},
+	{}
+};
+
+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[id->driver_info],
+				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);