[media] rename most media/video usb drivers to media/usb

Rename all USB drivers with their own directory under
drivers/media/video into drivers/media/usb and update the
building system.

Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

1 files changed, 932 insertions, 0 deletions

diff --git a/drivers/media/usb/gspca/pac7302.c b/drivers/media/usb/gspca/pac7302.c
new file mode 100644
index 000000000000..4877f7ab3d59
--- /dev/null
+++ b/drivers/media/usb/gspca/pac7302.c
@@ -0,0 +1,932 @@
+/*
+ * Pixart PAC7302 driver
+ *
+ * Copyright (C) 2008-2012 Jean-Francois Moine <http://moinejf.free.fr>
+ * Copyright (C) 2005 Thomas Kaiser thomas@kaiser-linux.li
+ *
+ * Separated from Pixart PAC7311 library by Márton Németh
+ * Camera button input handling by Márton Németh <nm127@freemail.hu>
+ * Copyright (C) 2009-2010 Márton Németh <nm127@freemail.hu>
+ *
+ * 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
+ */
+
+/*
+ * Some documentation about various registers as determined by trial and error.
+ *
+ * Register page 1:
+ *
+ * Address      Description
+ * 0x78         Global control, bit 6 controls the LED (inverted)
+ * 0x80         Compression balance, 2 interesting settings:
+ *              0x0f Default
+ *              0x50 Values >= this switch the camera to a lower compression,
+ *                   using the same table for both luminance and chrominance.
+ *                   This gives a sharper picture. Only usable when running
+ *                   at < 15 fps! Note currently the driver does not use this
+ *                   as the quality gain is small and the generated JPG-s are
+ *                   only understood by v4l-utils >= 0.8.9
+ *
+ * Register page 3:
+ *
+ * Address      Description
+ * 0x02         Clock divider 3-63, fps = 90 / val. Must be a multiple of 3 on
+ *              the 7302, so one of 3, 6, 9, ..., except when between 6 and 12?
+ * 0x03         Variable framerate ctrl reg2==3: 0 -> ~30 fps, 255 -> ~22fps
+ * 0x04         Another var framerate ctrl reg2==3, reg3==0: 0 -> ~30 fps,
+ *              63 -> ~27 fps, the 2 msb's must always be 1 !!
+ * 0x05         Another var framerate ctrl reg2==3, reg3==0, reg4==0xc0:
+ *              1 -> ~30 fps, 2 -> ~20 fps
+ * 0x0e         Exposure bits 0-7, 0-448, 0 = use full frame time
+ * 0x0f         Exposure bit 8, 0-448, 448 = no exposure at all
+ * 0x10         Gain 0-31
+ * 0x12         Another gain 0-31, unlike 0x10 this one seems to start with an
+ *              amplification value of 1 rather then 0 at its lowest setting
+ * 0x21         Bitfield: 0-1 unused, 2-3 vflip/hflip, 4-5 unknown, 6-7 unused
+ * 0x80         Another framerate control, best left at 1, moving it from 1 to
+ *              2 causes the framerate to become 3/4th of what it was, and
+ *              also seems to cause pixel averaging, resulting in an effective
+ *              resolution of 320x240 and thus a much blockier image
+ *
+ * The registers are accessed in the following functions:
+ *
+ * Page | Register   | Function
+ * -----+------------+---------------------------------------------------
+ *  0   | 0x0f..0x20 | setcolors()
+ *  0   | 0xa2..0xab | setbrightcont()
+ *  0   | 0xc5       | setredbalance()
+ *  0   | 0xc6       | setwhitebalance()
+ *  0   | 0xc7       | setbluebalance()
+ *  0   | 0xdc       | setbrightcont(), setcolors()
+ *  3   | 0x02       | setexposure()
+ *  3   | 0x10, 0x12 | setgain()
+ *  3   | 0x11       | setcolors(), setgain(), setexposure(), sethvflip()
+ *  3   | 0x21       | sethvflip()
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <linux/input.h>
+#include <media/v4l2-chip-ident.h>
+#include "gspca.h"
+/* Include pac common sof detection functions */
+#include "pac_common.h"
+
+#define PAC7302_GAIN_DEFAULT      15
+#define PAC7302_GAIN_KNEE         42
+#define PAC7302_EXPOSURE_DEFAULT  66 /* 33 ms / 30 fps */
+#define PAC7302_EXPOSURE_KNEE    133 /* 66 ms / 15 fps */
+
+MODULE_AUTHOR("Jean-Francois Moine <http://moinejf.free.fr>, "
+                "Thomas Kaiser thomas@kaiser-linux.li");
+MODULE_DESCRIPTION("Pixart PAC7302");
+MODULE_LICENSE("GPL");
+
+struct sd {
+        struct gspca_dev gspca_dev;             /* !! must be the first item */
+
+        struct { /* brightness / contrast cluster */
+                struct v4l2_ctrl *brightness;
+                struct v4l2_ctrl *contrast;
+        };
+        struct v4l2_ctrl *saturation;
+        struct v4l2_ctrl *white_balance;
+        struct v4l2_ctrl *red_balance;
+        struct v4l2_ctrl *blue_balance;
+        struct { /* flip cluster */
+                struct v4l2_ctrl *hflip;
+                struct v4l2_ctrl *vflip;
+        };
+        u8 flags;
+#define FL_HFLIP 0x01           /* mirrored by default */
+#define FL_VFLIP 0x02           /* vertical flipped by default */
+
+        u8 sof_read;
+        s8 autogain_ignore_frames;
+
+        atomic_t avg_lum;
+};
+
+static const struct v4l2_pix_format vga_mode[] = {
+        {640, 480, V4L2_PIX_FMT_PJPG, V4L2_FIELD_NONE,
+                .bytesperline = 640,
+                .sizeimage = 640 * 480 * 3 / 8 + 590,
+                .colorspace = V4L2_COLORSPACE_JPEG,
+        },
+};
+
+#define LOAD_PAGE3              255
+#define END_OF_SEQUENCE         0
+
+static const u8 init_7302[] = {
+/*      index,value */
+        0xff, 0x01,             /* page 1 */
+        0x78, 0x00,             /* deactivate */
+        0xff, 0x01,
+        0x78, 0x40,             /* led off */
+};
+static const u8 start_7302[] = {
+/*      index, len, [value]* */
+        0xff, 1,        0x00,           /* page 0 */
+        0x00, 12,       0x01, 0x40, 0x40, 0x40, 0x01, 0xe0, 0x02, 0x80,
+                        0x00, 0x00, 0x00, 0x00,
+        0x0d, 24,       0x03, 0x01, 0x00, 0xb5, 0x07, 0xcb, 0x00, 0x00,
+                        0x07, 0xc8, 0x00, 0xea, 0x07, 0xcf, 0x07, 0xf7,
+                        0x07, 0x7e, 0x01, 0x0b, 0x00, 0x00, 0x00, 0x11,
+        0x26, 2,        0xaa, 0xaa,
+        0x2e, 1,        0x31,
+        0x38, 1,        0x01,
+        0x3a, 3,        0x14, 0xff, 0x5a,
+        0x43, 11,       0x00, 0x0a, 0x18, 0x11, 0x01, 0x2c, 0x88, 0x11,
+                        0x00, 0x54, 0x11,
+        0x55, 1,        0x00,
+        0x62, 4,        0x10, 0x1e, 0x1e, 0x18,
+        0x6b, 1,        0x00,
+        0x6e, 3,        0x08, 0x06, 0x00,
+        0x72, 3,        0x00, 0xff, 0x00,
+        0x7d, 23,       0x01, 0x01, 0x58, 0x46, 0x50, 0x3c, 0x50, 0x3c,
+                        0x54, 0x46, 0x54, 0x56, 0x52, 0x50, 0x52, 0x50,
+                        0x56, 0x64, 0xa4, 0x00, 0xda, 0x00, 0x00,
+        0xa2, 10,       0x22, 0x2c, 0x3c, 0x54, 0x69, 0x7c, 0x9c, 0xb9,
+                        0xd2, 0xeb,
+        0xaf, 1,        0x02,
+        0xb5, 2,        0x08, 0x08,
+        0xb8, 2,        0x08, 0x88,
+        0xc4, 4,        0xae, 0x01, 0x04, 0x01,
+        0xcc, 1,        0x00,
+        0xd1, 11,       0x01, 0x30, 0x49, 0x5e, 0x6f, 0x7f, 0x8e, 0xa9,
+                        0xc1, 0xd7, 0xec,
+        0xdc, 1,        0x01,
+        0xff, 1,        0x01,           /* page 1 */
+        0x12, 3,        0x02, 0x00, 0x01,
+        0x3e, 2,        0x00, 0x00,
+        0x76, 5,        0x01, 0x20, 0x40, 0x00, 0xf2,
+        0x7c, 1,        0x00,
+        0x7f, 10,       0x4b, 0x0f, 0x01, 0x2c, 0x02, 0x58, 0x03, 0x20,
+                        0x02, 0x00,
+        0x96, 5,        0x01, 0x10, 0x04, 0x01, 0x04,
+        0xc8, 14,       0x00, 0x00, 0x00, 0x00, 0x00, 0x07, 0x00, 0x00,
+                        0x07, 0x00, 0x01, 0x07, 0x04, 0x01,
+        0xd8, 1,        0x01,
+        0xdb, 2,        0x00, 0x01,
+        0xde, 7,        0x00, 0x01, 0x04, 0x04, 0x00, 0x00, 0x00,
+        0xe6, 4,        0x00, 0x00, 0x00, 0x01,
+        0xeb, 1,        0x00,
+        0xff, 1,        0x02,           /* page 2 */
+        0x22, 1,        0x00,
+        0xff, 1,        0x03,           /* page 3 */
+        0, LOAD_PAGE3,                  /* load the page 3 */
+        0x11, 1,        0x01,
+        0xff, 1,        0x02,           /* page 2 */
+        0x13, 1,        0x00,
+        0x22, 4,        0x1f, 0xa4, 0xf0, 0x96,
+        0x27, 2,        0x14, 0x0c,
+        0x2a, 5,        0xc8, 0x00, 0x18, 0x12, 0x22,
+        0x64, 8,        0x00, 0x00, 0xf0, 0x01, 0x14, 0x44, 0x44, 0x44,
+        0x6e, 1,        0x08,
+        0xff, 1,        0x01,           /* page 1 */
+        0x78, 1,        0x00,
+        0, END_OF_SEQUENCE              /* end of sequence */
+};
+
+#define SKIP            0xaa
+/* page 3 - the value SKIP says skip the index - see reg_w_page() */
+static const u8 page3_7302[] = {
+        0x90, 0x40, 0x03, 0x00, 0xc0, 0x01, 0x14, 0x16,
+        0x14, 0x12, 0x00, 0x00, 0x00, 0x02, 0x33, 0x00,
+        0x0f, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+        0x00, 0x00, 0x00, 0x47, 0x01, 0xb3, 0x01, 0x00,
+        0x00, 0x08, 0x00, 0x00, 0x0d, 0x00, 0x00, 0x21,
+        0x00, 0x00, 0x00, 0x54, 0xf4, 0x02, 0x52, 0x54,
+        0xa4, 0xb8, 0xe0, 0x2a, 0xf6, 0x00, 0x00, 0x00,
+        0x00, 0x1e, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+        0x00, 0xfc, 0x00, 0xf2, 0x1f, 0x04, 0x00, 0x00,
+        SKIP, 0x00, 0x00, 0xc0, 0xc0, 0x10, 0x00, 0x00,
+        0x00, 0x40, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+        0x00, 0x40, 0xff, 0x03, 0x19, 0x00, 0x00, 0x00,
+        0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+        0x00, 0x00, 0x00, 0x00, 0x00, 0xc8, 0xc8, 0xc8,
+        0xc8, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x50,
+        0x08, 0x10, 0x24, 0x40, 0x00, 0x00, 0x00, 0x00,
+        0x01, 0x00, 0x02, 0x47, 0x00, 0x00, 0x00, 0x00,
+        0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+        0x00, 0x02, 0xfa, 0x00, 0x64, 0x5a, 0x28, 0x00,
+        0x00
+};
+
+static void reg_w_buf(struct gspca_dev *gspca_dev,
+                u8 index,
+                  const u8 *buffer, int len)
+{
+        int ret;
+
+        if (gspca_dev->usb_err < 0)
+                return;
+        memcpy(gspca_dev->usb_buf, buffer, len);
+        ret = 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);
+        if (ret < 0) {
+                pr_err("reg_w_buf failed i: %02x error %d\n",
+                       index, ret);
+                gspca_dev->usb_err = ret;
+        }
+}
+
+
+static void reg_w(struct gspca_dev *gspca_dev,
+                u8 index,
+                u8 value)
+{
+        int ret;
+
+        if (gspca_dev->usb_err < 0)
+                return;
+        gspca_dev->usb_buf[0] = value;
+        ret = usb_control_msg(gspca_dev->dev,
+                        usb_sndctrlpipe(gspca_dev->dev, 0),
+                        0,                      /* request */
+                        USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
+                        0, index, gspca_dev->usb_buf, 1,
+                        500);
+        if (ret < 0) {
+                pr_err("reg_w() failed i: %02x v: %02x error %d\n",
+                       index, value, ret);
+                gspca_dev->usb_err = ret;
+        }
+}
+
+static void reg_w_seq(struct gspca_dev *gspca_dev,
+                const u8 *seq, int len)
+{
+        while (--len >= 0) {
+                reg_w(gspca_dev, seq[0], seq[1]);
+                seq += 2;
+        }
+}
+
+/* load the beginning of a page */
+static void reg_w_page(struct gspca_dev *gspca_dev,
+                        const u8 *page, int len)
+{
+        int index;
+        int ret = 0;
+
+        if (gspca_dev->usb_err < 0)
+                return;
+        for (index = 0; index < len; index++) {
+                if (page[index] == SKIP)                /* skip this index */
+                        continue;
+                gspca_dev->usb_buf[0] = page[index];
+                ret = usb_control_msg(gspca_dev->dev,
+                                usb_sndctrlpipe(gspca_dev->dev, 0),
+                                0,                      /* request */
+                        USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
+                                0, index, gspca_dev->usb_buf, 1,
+                                500);
+                if (ret < 0) {
+                        pr_err("reg_w_page() failed i: %02x v: %02x error %d\n",
+                               index, page[index], ret);
+                        gspca_dev->usb_err = ret;
+                        break;
+                }
+        }
+}
+
+/* output a variable sequence */
+static void reg_w_var(struct gspca_dev *gspca_dev,
+                        const u8 *seq,
+                        const u8 *page3, unsigned int page3_len)
+{
+        int index, len;
+
+        for (;;) {
+                index = *seq++;
+                len = *seq++;
+                switch (len) {
+                case END_OF_SEQUENCE:
+                        return;
+                case LOAD_PAGE3:
+                        reg_w_page(gspca_dev, page3, page3_len);
+                        break;
+                default:
+#ifdef GSPCA_DEBUG
+                        if (len > USB_BUF_SZ) {
+                                PDEBUG(D_ERR|D_STREAM,
+                                        "Incorrect variable sequence");
+                                return;
+                        }
+#endif
+                        while (len > 0) {
+                                if (len < 8) {
+                                        reg_w_buf(gspca_dev,
+                                                index, seq, len);
+                                        seq += len;
+                                        break;
+                                }
+                                reg_w_buf(gspca_dev, index, seq, 8);
+                                seq += 8;
+                                index += 8;
+                                len -= 8;
+                        }
+                }
+        }
+        /* not reached */
+}
+
+/* this function is called at probe time for pac7302 */
+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;
+
+        cam = &gspca_dev->cam;
+
+        cam->cam_mode = vga_mode;       /* only 640x480 */
+        cam->nmodes = ARRAY_SIZE(vga_mode);
+
+        sd->flags = id->driver_info;
+        return 0;
+}
+
+static void setbrightcont(struct gspca_dev *gspca_dev)
+{
+        struct sd *sd = (struct sd *) gspca_dev;
+        int i, v;
+        static const u8 max[10] =
+                {0x29, 0x33, 0x42, 0x5a, 0x6e, 0x80, 0x9f, 0xbb,
+                 0xd4, 0xec};
+        static const u8 delta[10] =
+                {0x35, 0x33, 0x33, 0x2f, 0x2a, 0x25, 0x1e, 0x17,
+                 0x11, 0x0b};
+
+        reg_w(gspca_dev, 0xff, 0x00);           /* page 0 */
+        for (i = 0; i < 10; i++) {
+                v = max[i];
+                v += (sd->brightness->val - sd->brightness->maximum)
+                        * 150 / sd->brightness->maximum; /* 200 ? */
+                v -= delta[i] * sd->contrast->val / sd->contrast->maximum;
+                if (v < 0)
+                        v = 0;
+                else if (v > 0xff)
+                        v = 0xff;
+                reg_w(gspca_dev, 0xa2 + i, v);
+        }
+        reg_w(gspca_dev, 0xdc, 0x01);
+}
+
+static void setcolors(struct gspca_dev *gspca_dev)
+{
+        struct sd *sd = (struct sd *) gspca_dev;
+        int i, v;
+        static const int a[9] =
+                {217, -212, 0, -101, 170, -67, -38, -315, 355};
+        static const int b[9] =
+                {19, 106, 0, 19, 106, 1, 19, 106, 1};
+
+        reg_w(gspca_dev, 0xff, 0x03);                   /* page 3 */
+        reg_w(gspca_dev, 0x11, 0x01);
+        reg_w(gspca_dev, 0xff, 0x00);                   /* page 0 */
+        for (i = 0; i < 9; i++) {
+                v = a[i] * sd->saturation->val / sd->saturation->maximum;
+                v += b[i];
+                reg_w(gspca_dev, 0x0f + 2 * i, (v >> 8) & 0x07);
+                reg_w(gspca_dev, 0x0f + 2 * i + 1, v);
+        }
+        reg_w(gspca_dev, 0xdc, 0x01);
+}
+
+static void setwhitebalance(struct gspca_dev *gspca_dev)
+{
+        struct sd *sd = (struct sd *) gspca_dev;
+
+        reg_w(gspca_dev, 0xff, 0x00);           /* page 0 */
+        reg_w(gspca_dev, 0xc6, sd->white_balance->val);
+
+        reg_w(gspca_dev, 0xdc, 0x01);
+}
+
+static void setredbalance(struct gspca_dev *gspca_dev)
+{
+        struct sd *sd = (struct sd *) gspca_dev;
+
+        reg_w(gspca_dev, 0xff, 0x00);           /* page 0 */
+        reg_w(gspca_dev, 0xc5, sd->red_balance->val);
+
+        reg_w(gspca_dev, 0xdc, 0x01);
+}
+
+static void setbluebalance(struct gspca_dev *gspca_dev)
+{
+        struct sd *sd = (struct sd *) gspca_dev;
+
+        reg_w(gspca_dev, 0xff, 0x00);                   /* page 0 */
+        reg_w(gspca_dev, 0xc7, sd->blue_balance->val);
+
+        reg_w(gspca_dev, 0xdc, 0x01);
+}
+
+static void setgain(struct gspca_dev *gspca_dev)
+{
+        u8 reg10, reg12;
+
+        if (gspca_dev->gain->val < 32) {
+                reg10 = gspca_dev->gain->val;
+                reg12 = 0;
+        } else {
+                reg10 = 31;
+                reg12 = gspca_dev->gain->val - 31;
+        }
+
+        reg_w(gspca_dev, 0xff, 0x03);                   /* page 3 */
+        reg_w(gspca_dev, 0x10, reg10);
+        reg_w(gspca_dev, 0x12, reg12);
+
+        /* load registers to sensor (Bit 0, auto clear) */
+        reg_w(gspca_dev, 0x11, 0x01);
+}
+
+static void setexposure(struct gspca_dev *gspca_dev)
+{
+        u8 clockdiv;
+        u16 exposure;
+
+        /*
+         * Register 2 of frame 3 contains the clock divider configuring the
+         * no fps according to the formula: 90 / reg. sd->exposure is the
+         * desired exposure time in 0.5 ms.
+         */
+        clockdiv = (90 * gspca_dev->exposure->val + 1999) / 2000;
+
+        /*
+         * Note clockdiv = 3 also works, but when running at 30 fps, depending
+         * on the scene being recorded, the camera switches to another
+         * quantization table for certain JPEG blocks, and we don't know how
+         * to decompress these blocks. So we cap the framerate at 15 fps.
+         */
+        if (clockdiv < 6)
+                clockdiv = 6;
+        else if (clockdiv > 63)
+                clockdiv = 63;
+
+        /*
+         * Register 2 MUST be a multiple of 3, except when between 6 and 12?
+         * Always round up, otherwise we cannot get the desired frametime
+         * using the partial frame time exposure control.
+         */
+        if (clockdiv < 6 || clockdiv > 12)
+                clockdiv = ((clockdiv + 2) / 3) * 3;
+
+        /*
+         * frame exposure time in ms = 1000 * clockdiv / 90    ->
+         * exposure = (sd->exposure / 2) * 448 / (1000 * clockdiv / 90)
+         */
+        exposure = (gspca_dev->exposure->val * 45 * 448) / (1000 * clockdiv);
+        /* 0 = use full frametime, 448 = no exposure, reverse it */
+        exposure = 448 - exposure;
+
+        reg_w(gspca_dev, 0xff, 0x03);                   /* page 3 */
+        reg_w(gspca_dev, 0x02, clockdiv);
+        reg_w(gspca_dev, 0x0e, exposure & 0xff);
+        reg_w(gspca_dev, 0x0f, exposure >> 8);
+
+        /* load registers to sensor (Bit 0, auto clear) */
+        reg_w(gspca_dev, 0x11, 0x01);
+}
+
+static void sethvflip(struct gspca_dev *gspca_dev)
+{
+        struct sd *sd = (struct sd *) gspca_dev;
+        u8 data, hflip, vflip;
+
+        hflip = sd->hflip->val;
+        if (sd->flags & FL_HFLIP)
+                hflip = !hflip;
+        vflip = sd->vflip->val;
+        if (sd->flags & FL_VFLIP)
+                vflip = !vflip;
+
+        reg_w(gspca_dev, 0xff, 0x03);                   /* page 3 */
+        data = (hflip ? 0x08 : 0x00) | (vflip ? 0x04 : 0x00);
+        reg_w(gspca_dev, 0x21, data);
+
+        /* load registers to sensor (Bit 0, auto clear) */
+        reg_w(gspca_dev, 0x11, 0x01);
+}
+
+/* this function is called at probe and resume time for pac7302 */
+static int sd_init(struct gspca_dev *gspca_dev)
+{
+        reg_w_seq(gspca_dev, init_7302, sizeof(init_7302)/2);
+        return gspca_dev->usb_err;
+}
+
+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 (ctrl->id == V4L2_CID_AUTOGAIN && ctrl->is_new && ctrl->val) {
+                /* when switching to autogain set defaults to make sure
+                   we are on a valid point of the autogain gain /
+                   exposure knee graph, and give this change time to
+                   take effect before doing autogain. */
+                gspca_dev->exposure->val    = PAC7302_EXPOSURE_DEFAULT;
+                gspca_dev->gain->val        = PAC7302_GAIN_DEFAULT;
+                sd->autogain_ignore_frames  = PAC_AUTOGAIN_IGNORE_FRAMES;
+        }
+
+        if (!gspca_dev->streaming)
+                return 0;
+
+        switch (ctrl->id) {
+        case V4L2_CID_BRIGHTNESS:
+                setbrightcont(gspca_dev);
+                break;
+        case V4L2_CID_SATURATION:
+                setcolors(gspca_dev);
+                break;
+        case V4L2_CID_WHITE_BALANCE_TEMPERATURE:
+                setwhitebalance(gspca_dev);
+                break;
+        case V4L2_CID_RED_BALANCE:
+                setredbalance(gspca_dev);
+                break;
+        case V4L2_CID_BLUE_BALANCE:
+                setbluebalance(gspca_dev);
+                break;
+        case V4L2_CID_AUTOGAIN:
+                if (gspca_dev->exposure->is_new || (ctrl->is_new && ctrl->val))
+                        setexposure(gspca_dev);
+                if (gspca_dev->gain->is_new || (ctrl->is_new && ctrl->val))
+                        setgain(gspca_dev);
+                break;
+        case V4L2_CID_HFLIP:
+                sethvflip(gspca_dev);
+                break;
+        default:
+                return -EINVAL;
+        }
+        return gspca_dev->usb_err;
+}
+
+static const struct v4l2_ctrl_ops sd_ctrl_ops = {
+        .s_ctrl = sd_s_ctrl,
+};
+
+/* this function is called at probe time */
+static int sd_init_controls(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, 11);
+
+        sd->brightness = v4l2_ctrl_new_std(hdl, &sd_ctrl_ops,
+                                        V4L2_CID_BRIGHTNESS, 0, 32, 1, 16);
+        sd->contrast = v4l2_ctrl_new_std(hdl, &sd_ctrl_ops,
+                                        V4L2_CID_CONTRAST, 0, 255, 1, 127);
+
+        sd->saturation = v4l2_ctrl_new_std(hdl, &sd_ctrl_ops,
+                                        V4L2_CID_SATURATION, 0, 255, 1, 127);
+        sd->white_balance = v4l2_ctrl_new_std(hdl, &sd_ctrl_ops,
+                                        V4L2_CID_WHITE_BALANCE_TEMPERATURE,
+                                        0, 255, 1, 4);
+        sd->red_balance = v4l2_ctrl_new_std(hdl, &sd_ctrl_ops,
+                                        V4L2_CID_RED_BALANCE, 0, 3, 1, 1);
+        sd->blue_balance = v4l2_ctrl_new_std(hdl, &sd_ctrl_ops,
+                                        V4L2_CID_RED_BALANCE, 0, 3, 1, 1);
+
+        gspca_dev->autogain = v4l2_ctrl_new_std(hdl, &sd_ctrl_ops,
+                                        V4L2_CID_AUTOGAIN, 0, 1, 1, 1);
+        gspca_dev->exposure = v4l2_ctrl_new_std(hdl, &sd_ctrl_ops,
+                                        V4L2_CID_EXPOSURE, 0, 1023, 1,
+                                        PAC7302_EXPOSURE_DEFAULT);
+        gspca_dev->gain = v4l2_ctrl_new_std(hdl, &sd_ctrl_ops,
+                                        V4L2_CID_GAIN, 0, 62, 1,
+                                        PAC7302_GAIN_DEFAULT);
+
+        sd->hflip = v4l2_ctrl_new_std(hdl, &sd_ctrl_ops,
+                V4L2_CID_HFLIP, 0, 1, 1, 0);
+        sd->vflip = v4l2_ctrl_new_std(hdl, &sd_ctrl_ops,
+                V4L2_CID_VFLIP, 0, 1, 1, 0);
+
+        if (hdl->error) {
+                pr_err("Could not initialize controls\n");
+                return hdl->error;
+        }
+
+        v4l2_ctrl_cluster(2, &sd->brightness);
+        v4l2_ctrl_auto_cluster(3, &gspca_dev->autogain, 0, false);
+        v4l2_ctrl_cluster(2, &sd->hflip);
+        return 0;
+}
+
+/* -- start the camera -- */
+static int sd_start(struct gspca_dev *gspca_dev)
+{
+        struct sd *sd = (struct sd *) gspca_dev;
+
+        reg_w_var(gspca_dev, start_7302,
+                page3_7302, sizeof(page3_7302));
+        setbrightcont(gspca_dev);
+        setcolors(gspca_dev);
+        setwhitebalance(gspca_dev);
+        setredbalance(gspca_dev);
+        setbluebalance(gspca_dev);
+        setexposure(gspca_dev);
+        setgain(gspca_dev);
+        sethvflip(gspca_dev);
+
+        sd->sof_read = 0;
+        sd->autogain_ignore_frames = 0;
+        atomic_set(&sd->avg_lum, 270 + sd->brightness->val);
+
+        /* start stream */
+        reg_w(gspca_dev, 0xff, 0x01);
+        reg_w(gspca_dev, 0x78, 0x01);
+
+        return gspca_dev->usb_err;
+}
+
+static void sd_stopN(struct gspca_dev *gspca_dev)
+{
+
+        /* stop stream */
+        reg_w(gspca_dev, 0xff, 0x01);
+        reg_w(gspca_dev, 0x78, 0x00);
+}
+
+/* called on streamoff with alt 0 and on disconnect for pac7302 */
+static void sd_stop0(struct gspca_dev *gspca_dev)
+{
+        if (!gspca_dev->present)
+                return;
+        reg_w(gspca_dev, 0xff, 0x01);
+        reg_w(gspca_dev, 0x78, 0x40);
+}
+
+static void do_autogain(struct gspca_dev *gspca_dev)
+{
+        struct sd *sd = (struct sd *) gspca_dev;
+        int avg_lum = atomic_read(&sd->avg_lum);
+        int desired_lum;
+        const int deadzone = 30;
+
+        if (sd->autogain_ignore_frames < 0)
+                return;
+
+        if (sd->autogain_ignore_frames > 0) {
+                sd->autogain_ignore_frames--;
+        } else {
+                desired_lum = 270 + sd->brightness->val;
+
+                if (gspca_expo_autogain(gspca_dev, avg_lum, desired_lum,
+                                        deadzone, PAC7302_GAIN_KNEE,
+                                        PAC7302_EXPOSURE_KNEE))
+                        sd->autogain_ignore_frames =
+                                                PAC_AUTOGAIN_IGNORE_FRAMES;
+        }
+}
+
+/* JPEG header */
+static const u8 jpeg_header[] = {
+        0xff, 0xd8,     /* SOI: Start of Image */
+
+        0xff, 0xc0,     /* SOF0: Start of Frame (Baseline DCT) */
+        0x00, 0x11,     /* length = 17 bytes (including this length field) */
+        0x08,           /* Precision: 8 */
+        0x02, 0x80,     /* height = 640 (image rotated) */
+        0x01, 0xe0,     /* width = 480 */
+        0x03,           /* Number of image components: 3 */
+        0x01, 0x21, 0x00, /* ID=1, Subsampling 1x1, Quantization table: 0 */
+        0x02, 0x11, 0x01, /* ID=2, Subsampling 2x1, Quantization table: 1 */
+        0x03, 0x11, 0x01, /* ID=3, Subsampling 2x1, Quantization table: 1 */
+
+        0xff, 0xda,     /* SOS: Start Of Scan */
+        0x00, 0x0c,     /* length = 12 bytes (including this length field) */
+        0x03,           /* number of components: 3 */
+        0x01, 0x00,     /* selector 1, table 0x00 */
+        0x02, 0x11,     /* selector 2, table 0x11 */
+        0x03, 0x11,     /* selector 3, table 0x11 */
+        0x00, 0x3f,     /* Spectral selection: 0 .. 63 */
+        0x00            /* Successive approximation: 0 */
+};
+
+/* this function is run at interrupt level */
+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;
+        u8 *image;
+        u8 *sof;
+
+        sof = pac_find_sof(&sd->sof_read, data, len);
+        if (sof) {
+                int n, lum_offset, footer_length;
+
+                /*
+                 * 6 bytes after the FF D9 EOF marker a number of lumination
+                 * bytes are send corresponding to different parts of the
+                 * image, the 14th and 15th byte after the EOF seem to
+                 * correspond to the center of the image.
+                 */
+                lum_offset = 61 + sizeof pac_sof_marker;
+                footer_length = 74;
+
+                /* Finish decoding current frame */
+                n = (sof - data) - (footer_length + sizeof pac_sof_marker);
+                if (n < 0) {
+                        gspca_dev->image_len += n;
+                        n = 0;
+                } else {
+                        gspca_frame_add(gspca_dev, INTER_PACKET, data, n);
+                }
+
+                image = gspca_dev->image;
+                if (image != NULL
+                 && image[gspca_dev->image_len - 2] == 0xff
+                 && image[gspca_dev->image_len - 1] == 0xd9)
+                        gspca_frame_add(gspca_dev, LAST_PACKET, NULL, 0);
+
+                n = sof - data;
+                len -= n;
+                data = sof;
+
+                /* Get average lumination */
+                if (gspca_dev->last_packet_type == LAST_PACKET &&
+                                n >= lum_offset)
+                        atomic_set(&sd->avg_lum, data[-lum_offset] +
+                                                data[-lum_offset + 1]);
+
+                /* Start the new frame with the jpeg header */
+                /* The PAC7302 has the image rotated 90 degrees */
+                gspca_frame_add(gspca_dev, FIRST_PACKET,
+                                jpeg_header, sizeof jpeg_header);
+        }
+        gspca_frame_add(gspca_dev, INTER_PACKET, data, len);
+}
+
+#ifdef CONFIG_VIDEO_ADV_DEBUG
+static int sd_dbg_s_register(struct gspca_dev *gspca_dev,
+                        struct v4l2_dbg_register *reg)
+{
+        u8 index;
+        u8 value;
+
+        /*
+         * reg->reg: bit0..15: reserved for register index (wIndex is 16bit
+         *                     long on the USB bus)
+         */
+        if (reg->match.type == V4L2_CHIP_MATCH_HOST &&
+            reg->match.addr == 0 &&
+            (reg->reg < 0x000000ff) &&
+            (reg->val <= 0x000000ff)
+        ) {
+                /* Currently writing to page 0 is only supported. */
+                /* reg_w() only supports 8bit index */
+                index = reg->reg;
+                value = reg->val;
+
+                /*
+                 * Note that there shall be no access to other page
+                 * by any other function between the page switch and
+                 * the actual register write.
+                 */
+                reg_w(gspca_dev, 0xff, 0x00);           /* page 0 */
+                reg_w(gspca_dev, index, value);
+
+                reg_w(gspca_dev, 0xdc, 0x01);
+        }
+        return gspca_dev->usb_err;
+}
+
+static int sd_chip_ident(struct gspca_dev *gspca_dev,
+                        struct v4l2_dbg_chip_ident *chip)
+{
+        int ret = -EINVAL;
+
+        if (chip->match.type == V4L2_CHIP_MATCH_HOST &&
+            chip->match.addr == 0) {
+                chip->revision = 0;
+                chip->ident = V4L2_IDENT_UNKNOWN;
+                ret = 0;
+        }
+        return ret;
+}
+#endif
+
+#if defined(CONFIG_INPUT) || defined(CONFIG_INPUT_MODULE)
+static int sd_int_pkt_scan(struct gspca_dev *gspca_dev,
+                        u8 *data,               /* interrupt packet data */
+                        int len)                /* interrput packet length */
+{
+        int ret = -EINVAL;
+        u8 data0, data1;
+
+        if (len == 2) {
+                data0 = data[0];
+                data1 = data[1];
+                if ((data0 == 0x00 && data1 == 0x11) ||
+                    (data0 == 0x22 && data1 == 0x33) ||
+                    (data0 == 0x44 && data1 == 0x55) ||
+                    (data0 == 0x66 && data1 == 0x77) ||
+                    (data0 == 0x88 && data1 == 0x99) ||
+                    (data0 == 0xaa && data1 == 0xbb) ||
+                    (data0 == 0xcc && data1 == 0xdd) ||
+                    (data0 == 0xee && data1 == 0xff)) {
+                        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);
+                        ret = 0;
+                }
+        }
+
+        return ret;
+}
+#endif
+
+/* sub-driver description for pac7302 */
+static const struct sd_desc sd_desc = {
+        .name = KBUILD_MODNAME,
+        .config = sd_config,
+        .init = sd_init,
+        .init_controls = sd_init_controls,
+        .start = sd_start,
+        .stopN = sd_stopN,
+        .stop0 = sd_stop0,
+        .pkt_scan = sd_pkt_scan,
+        .dq_callback = do_autogain,
+#ifdef CONFIG_VIDEO_ADV_DEBUG
+        .set_register = sd_dbg_s_register,
+        .get_chip_ident = sd_chip_ident,
+#endif
+#if defined(CONFIG_INPUT) || defined(CONFIG_INPUT_MODULE)
+        .int_pkt_scan = sd_int_pkt_scan,
+#endif
+};
+
+/* -- module initialisation -- */
+static const struct usb_device_id device_table[] = {
+        {USB_DEVICE(0x06f8, 0x3009)},
+        {USB_DEVICE(0x06f8, 0x301b)},
+        {USB_DEVICE(0x093a, 0x2620)},
+        {USB_DEVICE(0x093a, 0x2621)},
+        {USB_DEVICE(0x093a, 0x2622), .driver_info = FL_VFLIP},
+        {USB_DEVICE(0x093a, 0x2624), .driver_info = FL_VFLIP},
+        {USB_DEVICE(0x093a, 0x2625)},
+        {USB_DEVICE(0x093a, 0x2626)},
+        {USB_DEVICE(0x093a, 0x2627), .driver_info = FL_VFLIP},
+        {USB_DEVICE(0x093a, 0x2628)},
+        {USB_DEVICE(0x093a, 0x2629), .driver_info = FL_VFLIP},
+        {USB_DEVICE(0x093a, 0x262a)},
+        {USB_DEVICE(0x093a, 0x262c)},
+        {USB_DEVICE(0x145f, 0x013c)},
+        {}
+};
+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 = KBUILD_MODNAME,
+        .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);