[media] gspca_touptek: Add support for ToupTek UCMOS series USB cameras
authorJohn McMaster <johndmcmaster@gmail.com>
Mon, 1 Dec 2014 02:27:53 +0000 (23:27 -0300)
committerMauro Carvalho Chehab <mchehab@osg.samsung.com>
Thu, 29 Jan 2015 20:13:13 +0000 (18:13 -0200)
Adds support for AmScope MU800 / ToupTek UCMOS08000KPB USB microscope camera.

Signed-off-by: John McMaster <johndmcmaster@gmail.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
drivers/media/usb/gspca/Kconfig
drivers/media/usb/gspca/Makefile
drivers/media/usb/gspca/touptek.c [new file with mode: 0644]

index eed10d78253516c1bba830ad664996d12907512c..60af3b167f3b73e02071074a8e01ce39499c8d98 100644 (file)
@@ -395,6 +395,16 @@ config USB_GSPCA_TOPRO
          To compile this driver as a module, choose M here: the
          module will be called gspca_topro.
 
+config USB_GSPCA_TOUPTEK
+       tristate "Touptek USB Camera Driver"
+       depends on VIDEO_V4L2 && USB_GSPCA
+       help
+         Say Y here if you want support for cameras based on the ToupTek UCMOS
+         / AmScope MU series camera.
+
+         To compile this driver as a module, choose M here: the
+         module will be called gspca_touptek.
+
 config USB_GSPCA_TV8532
        tristate "TV8532 USB Camera Driver"
        depends on VIDEO_V4L2 && USB_GSPCA
index f46975e4c82d00ead3b68df5e02f5a78285dd981..9f5ccecb9c8a3e17bf235633f4104b263b2871be 100644 (file)
@@ -39,6 +39,7 @@ obj-$(CONFIG_USB_GSPCA_STK1135)  += gspca_stk1135.o
 obj-$(CONFIG_USB_GSPCA_STV0680)  += gspca_stv0680.o
 obj-$(CONFIG_USB_GSPCA_T613)     += gspca_t613.o
 obj-$(CONFIG_USB_GSPCA_TOPRO)    += gspca_topro.o
+obj-$(CONFIG_USB_GSPCA_TOUPTEK)  += gspca_touptek.o
 obj-$(CONFIG_USB_GSPCA_TV8532)   += gspca_tv8532.o
 obj-$(CONFIG_USB_GSPCA_VC032X)   += gspca_vc032x.o
 obj-$(CONFIG_USB_GSPCA_VICAM)    += gspca_vicam.o
@@ -86,6 +87,7 @@ gspca_stv0680-objs  := stv0680.o
 gspca_sunplus-objs  := sunplus.o
 gspca_t613-objs     := t613.o
 gspca_topro-objs    := topro.o
+gspca_touptek-objs  := touptek.o
 gspca_tv8532-objs   := tv8532.o
 gspca_vc032x-objs   := vc032x.o
 gspca_vicam-objs    := vicam.o
diff --git a/drivers/media/usb/gspca/touptek.c b/drivers/media/usb/gspca/touptek.c
new file mode 100644 (file)
index 0000000..8b7c01e
--- /dev/null
@@ -0,0 +1,732 @@
+/*
+ * ToupTek UCMOS / AmScope MU series camera driver
+ * TODO: contrast with ScopeTek / AmScope MDC cameras
+ *
+ * Copyright (C) 2012-2014 John McMaster <JohnDMcMaster@gmail.com>
+ *
+ * Special thanks to Bushing for helping with the decrypt algorithm and
+ * Sean O'Sullivan / the Rensselaer Center for Open Source
+ * Software (RCOS) for helping me learn kernel development
+ *
+ * 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
+ */
+
+#include "gspca.h"
+
+#define MODULE_NAME "touptek"
+
+MODULE_AUTHOR("John McMaster");
+MODULE_DESCRIPTION("ToupTek UCMOS / Amscope MU microscope camera driver");
+MODULE_LICENSE("GPL");
+
+/*
+Exposure reg is linear with exposure time
+Exposure (sec), E (reg)
+0.000400, 0x0002
+0.001000, 0x0005
+0.005000, 0x0019
+0.020000, 0x0064
+0.080000, 0x0190
+0.400000, 0x07D0
+1.000000, 0x1388
+2.000000, 0x2710
+
+Three gain stages
+0x1000: master channel enable bit
+0x007F: low gain bits
+0x0080: medium gain bit
+0x0100: high gain bit
+gain = enable * (1 + regH) * (1 + regM) * z * regL
+
+Gain implementation
+Want to do something similar to mt9v011.c's set_balance
+
+Gain does not vary with resolution (checked 640x480 vs 1600x1200)
+
+Constant derivation:
+
+Raw data:
+Gain,   GTOP,   B,       R,      GBOT
+1.00,   0x105C, 0x1068, 0x10C8, 0x105C
+1.20,   0x106E, 0x107E, 0x10D6, 0x106E
+1.40,   0x10C0, 0x10CA, 0x10E5, 0x10C0
+1.60,   0x10C9, 0x10D4, 0x10F3, 0x10C9
+1.80,   0x10D2, 0x10DE, 0x11C1, 0x10D2
+2.00,   0x10DC, 0x10E9, 0x11C8, 0x10DC
+2.20,   0x10E5, 0x10F3, 0x11CF, 0x10E5
+2.40,   0x10EE, 0x10FE, 0x11D7, 0x10EE
+2.60,   0x10F7, 0x11C4, 0x11DE, 0x10F7
+2.80,   0x11C0, 0x11CA, 0x11E5, 0x11C0
+3.00,   0x11C5, 0x11CF, 0x11ED, 0x11C5
+
+zR = 0.0069605943152454778
+       about 3/431 = 0.0069605568445475635
+zB = 0.0095695970695970703
+       about 6/627 = 0.0095693779904306216
+zG = 0.010889328063241107
+       about 6/551 = 0.010889292196007259
+about 10 bits for constant + 7 bits for value => at least 17 bit intermediate
+with 32 bit ints should be fine for overflow etc
+Essentially gains are in range 0-0x001FF
+
+However, V4L expects a main gain channel + R and B balance
+To keep things simple for now saturate the values of balance is too high/low
+This isn't really ideal but easy way to fit the Linux model
+
+Converted using gain model turns out to be quite linear:
+Gain, GTOP, B, R, GBOT
+1.00, 92, 104, 144, 92
+1.20, 110, 126, 172, 110
+1.40, 128, 148, 202, 128
+1.60, 146, 168, 230, 146
+1.80, 164, 188, 260, 164
+2.00, 184, 210, 288, 184
+2.20, 202, 230, 316, 202
+2.40, 220, 252, 348, 220
+2.60, 238, 272, 376, 238
+2.80, 256, 296, 404, 256
+3.00, 276, 316, 436, 276
+
+Maximum gain is 0x7FF * 2 * 2 => 0x1FFC (8188)
+or about 13 effective bits of gain
+The highest the commercial driver goes in my setup 436
+However, because could *maybe* damage circuits
+limit the gain until have a reason to go higher
+Solution: gain clipped and warning emitted
+*/
+#define GAIN_MAX               511
+
+/* Frame sync is a short read */
+#define BULK_SIZE              0x4000
+
+/* MT9E001 reg names to give a rough approximation */
+#define REG_COARSE_INTEGRATION_TIME_   0x3012
+#define REG_GROUPED_PARAMETER_HOLD_    0x3022
+#define REG_MODE_SELECT                        0x0100
+#define REG_OP_SYS_CLK_DIV             0x030A
+#define REG_VT_SYS_CLK_DIV             0x0302
+#define REG_PRE_PLL_CLK_DIV            0x0304
+#define REG_VT_PIX_CLK_DIV             0x0300
+#define REG_OP_PIX_CLK_DIV             0x0308
+#define REG_PLL_MULTIPLIER             0x0306
+#define REG_COARSE_INTEGRATION_TIME_   0x3012
+#define REG_FRAME_LENGTH_LINES         0x0340
+#define REG_FRAME_LENGTH_LINES_                0x300A
+#define REG_GREEN1_GAIN                        0x3056
+#define REG_GREEN2_GAIN                        0x305C
+#define REG_GROUPED_PARAMETER_HOLD     0x0104
+#define REG_LINE_LENGTH_PCK_           0x300C
+#define REG_MODE_SELECT                        0x0100
+#define REG_PLL_MULTIPLIER             0x0306
+#define REG_READ_MODE                  0x3040
+#define REG_BLUE_GAIN                  0x3058
+#define REG_RED_GAIN                   0x305A
+#define REG_RESET_REGISTER             0x301A
+#define REG_SCALE_M                    0x0404
+#define REG_SCALING_MODE               0x0400
+#define REG_SOFTWARE_RESET             0x0103
+#define REG_X_ADDR_END                 0x0348
+#define REG_X_ADDR_START               0x0344
+#define REG_X_ADDR_START               0x0344
+#define REG_X_OUTPUT_SIZE              0x034C
+#define REG_Y_ADDR_END                 0x034A
+#define REG_Y_ADDR_START               0x0346
+#define REG_Y_OUTPUT_SIZE              0x034E
+
+
+/* specific webcam descriptor */
+struct sd {
+       struct gspca_dev gspca_dev;     /* !! must be the first item */
+       /* How many bytes this frame */
+       unsigned int this_f;
+
+       /*
+       Device has separate gains for each Bayer quadrant
+       V4L supports master gain which is referenced to G1/G2 and supplies
+       individual balance controls for R/B
+       */
+       struct v4l2_ctrl *blue;
+       struct v4l2_ctrl *red;
+};
+
+/* Used to simplify reg write error handling */
+struct cmd {
+       u16 value;
+       u16 index;
+};
+
+static const struct v4l2_pix_format vga_mode[] = {
+       {800, 600,
+               V4L2_PIX_FMT_SGRBG8,
+               V4L2_FIELD_NONE,
+               .bytesperline = 800,
+               .sizeimage = 800 * 600,
+               .colorspace = V4L2_COLORSPACE_SRGB},
+       {1600, 1200,
+               V4L2_PIX_FMT_SGRBG8,
+               V4L2_FIELD_NONE,
+               .bytesperline = 1600,
+               .sizeimage = 1600 * 1200,
+               .colorspace = V4L2_COLORSPACE_SRGB},
+       {3264, 2448,
+               V4L2_PIX_FMT_SGRBG8,
+               V4L2_FIELD_NONE,
+               .bytesperline = 3264,
+               .sizeimage = 3264 * 2448,
+               .colorspace = V4L2_COLORSPACE_SRGB},
+};
+
+/*
+As theres no known frame sync, the only way to keep synced is to try hard
+to never miss any packets
+*/
+#if MAX_NURBS < 4
+#error "Not enough URBs in the gspca table"
+#endif
+
+static int val_reply(struct gspca_dev *gspca_dev, const char *reply, int rc)
+{
+       if (rc < 0) {
+               PERR("reply has error %d", rc);
+               return -EIO;
+       }
+       if (rc != 1) {
+               PERR("Bad reply size %d", rc);
+               return -EIO;
+       }
+       if (reply[0] != 0x08) {
+               PERR("Bad reply 0x%02X", reply[0]);
+               return -EIO;
+       }
+       return 0;
+}
+
+static void reg_w(struct gspca_dev *gspca_dev, u16 value, u16 index)
+{
+       char buff[1];
+       int rc;
+
+       PDEBUG(D_USBO, "reg_w bReq=0x0B, bReqT=0xC0, wVal=0x%04X, wInd=0x%04X\n",
+               value, index);
+       rc = usb_control_msg(gspca_dev->dev, usb_rcvctrlpipe(gspca_dev->dev, 0),
+               0x0B, 0xC0, value, index, buff, 1, 500);
+       PDEBUG(D_USBO, "rc=%d, ret={0x%02X}", rc, buff[0]);
+       if (rc < 0) {
+               PERR("Failed reg_w(0x0B, 0xC0, 0x%04X, 0x%04X) w/ rc %d\n",
+                       value, index, rc);
+               gspca_dev->usb_err = rc;
+               return;
+       }
+       if (val_reply(gspca_dev, buff, rc)) {
+               PERR("Bad reply to reg_w(0x0B, 0xC0, 0x%04X, 0x%04X\n",
+                       value, index);
+               gspca_dev->usb_err = -EIO;
+       }
+}
+
+static void reg_w_buf(struct gspca_dev *gspca_dev,
+               const struct cmd *p, int l)
+{
+       do {
+               reg_w(gspca_dev, p->value, p->index);
+               p++;
+       } while (--l > 0);
+}
+
+static void setexposure(struct gspca_dev *gspca_dev, s32 val)
+{
+       u16 value;
+       unsigned int w = gspca_dev->pixfmt.width;
+
+       if (w == 800)
+               value = val * 5;
+       else if (w == 1600)
+               value = val * 3;
+       else if (w == 3264)
+               value = val * 3 / 2;
+       else {
+               PERR("Invalid width %u\n", w);
+               gspca_dev->usb_err = -EINVAL;
+               return;
+       }
+       PDEBUG(D_STREAM, "exposure: 0x%04X ms\n", value);
+       /* Wonder if theres a good reason for sending it twice */
+       /* probably not but leave it in because...why not */
+       reg_w(gspca_dev, value, REG_COARSE_INTEGRATION_TIME_);
+       reg_w(gspca_dev, value, REG_COARSE_INTEGRATION_TIME_);
+}
+
+static int gainify(int in)
+{
+       /*
+       TODO: check if there are any issues with corner cases
+       0x000 (0):0x07F (127): regL
+       0x080 (128) - 0x0FF (255): regM, regL
+       0x100 (256) - max: regH, regM, regL
+       */
+       if (in <= 0x7F)
+               return 0x1000 | in;
+       else if (in <= 0xFF)
+               return 0x1080 | in / 2;
+       else
+               return 0x1180 | in / 4;
+}
+
+static void setggain(struct gspca_dev *gspca_dev, u16 global_gain)
+{
+       u16 normalized;
+
+       normalized = gainify(global_gain);
+       PDEBUG(D_STREAM, "gain G1/G2 (0x%04X): 0x%04X (src 0x%04X)\n",
+                REG_GREEN1_GAIN,
+                normalized, global_gain);
+
+       reg_w(gspca_dev, normalized, REG_GREEN1_GAIN);
+       reg_w(gspca_dev, normalized, REG_GREEN2_GAIN);
+}
+
+static void setbgain(struct gspca_dev *gspca_dev,
+               u16 gain, u16 global_gain)
+{
+       u16 normalized;
+
+       normalized = global_gain +
+               ((u32)global_gain) * gain / GAIN_MAX;
+       if (normalized > GAIN_MAX) {
+               PDEBUG(D_STREAM, "Truncating blue 0x%04X w/ value 0x%04X\n",
+                        GAIN_MAX, normalized);
+               normalized = GAIN_MAX;
+       }
+       normalized = gainify(normalized);
+       PDEBUG(D_STREAM, "gain B (0x%04X): 0x%04X w/ source 0x%04X\n",
+                REG_BLUE_GAIN, normalized, gain);
+
+       reg_w(gspca_dev, normalized, REG_BLUE_GAIN);
+}
+
+static void setrgain(struct gspca_dev *gspca_dev,
+               u16 gain, u16 global_gain)
+{
+       u16 normalized;
+
+       normalized = global_gain +
+               ((u32)global_gain) * gain / GAIN_MAX;
+       if (normalized > GAIN_MAX) {
+               PDEBUG(D_STREAM, "Truncating gain 0x%04X w/ value 0x%04X\n",
+                        GAIN_MAX, normalized);
+               normalized = GAIN_MAX;
+       }
+       normalized = gainify(normalized);
+       PDEBUG(D_STREAM, "gain R (0x%04X): 0x%04X w / source 0x%04X\n",
+                REG_RED_GAIN, normalized, gain);
+
+       reg_w(gspca_dev, normalized, REG_RED_GAIN);
+}
+
+static void configure_wh(struct gspca_dev *gspca_dev)
+{
+       unsigned int w = gspca_dev->pixfmt.width;
+
+       PDEBUG(D_STREAM, "configure_wh\n");
+
+       if (w == 800) {
+               static const struct cmd reg_init_res[] = {
+                       {0x0060, REG_X_ADDR_START},
+                       {0x0CD9, REG_X_ADDR_END},
+                       {0x0036, REG_Y_ADDR_START},
+                       {0x098F, REG_Y_ADDR_END},
+                       {0x07C7, REG_READ_MODE},
+               };
+
+               reg_w_buf(gspca_dev,
+                              reg_init_res, ARRAY_SIZE(reg_init_res));
+       } else if (w == 1600) {
+               static const struct cmd reg_init_res[] = {
+                       {0x009C, REG_X_ADDR_START},
+                       {0x0D19, REG_X_ADDR_END},
+                       {0x0068, REG_Y_ADDR_START},
+                       {0x09C5, REG_Y_ADDR_END},
+                       {0x06C3, REG_READ_MODE},
+               };
+
+               reg_w_buf(gspca_dev,
+                              reg_init_res, ARRAY_SIZE(reg_init_res));
+       } else if (w == 3264) {
+               static const struct cmd reg_init_res[] = {
+                       {0x00E8, REG_X_ADDR_START},
+                       {0x0DA7, REG_X_ADDR_END},
+                       {0x009E, REG_Y_ADDR_START},
+                       {0x0A2D, REG_Y_ADDR_END},
+                       {0x0241, REG_READ_MODE},
+               };
+
+               reg_w_buf(gspca_dev,
+                              reg_init_res, ARRAY_SIZE(reg_init_res));
+       } else {
+               PERR("bad width %u\n", w);
+               gspca_dev->usb_err = -EINVAL;
+               return;
+       }
+
+       reg_w(gspca_dev, 0x0000, REG_SCALING_MODE);
+       reg_w(gspca_dev, 0x0010, REG_SCALE_M);
+       reg_w(gspca_dev, w, REG_X_OUTPUT_SIZE);
+       reg_w(gspca_dev, gspca_dev->pixfmt.height, REG_Y_OUTPUT_SIZE);
+
+       if (w == 800) {
+               reg_w(gspca_dev, 0x0384, REG_FRAME_LENGTH_LINES_);
+               reg_w(gspca_dev, 0x0960, REG_LINE_LENGTH_PCK_);
+       } else if (w == 1600) {
+               reg_w(gspca_dev, 0x0640, REG_FRAME_LENGTH_LINES_);
+               reg_w(gspca_dev, 0x0FA0, REG_LINE_LENGTH_PCK_);
+       } else if (w == 3264) {
+               reg_w(gspca_dev, 0x0B4B, REG_FRAME_LENGTH_LINES_);
+               reg_w(gspca_dev, 0x1F40, REG_LINE_LENGTH_PCK_);
+       } else {
+               PERR("bad width %u\n", w);
+               gspca_dev->usb_err = -EINVAL;
+               return;
+       }
+}
+
+/* Packets that were encrypted, no idea if the grouping is significant */
+static void configure_encrypted(struct gspca_dev *gspca_dev)
+{
+       static const struct cmd reg_init_begin[] = {
+               {0x0100, REG_SOFTWARE_RESET},
+               {0x0000, REG_MODE_SELECT},
+               {0x0100, REG_GROUPED_PARAMETER_HOLD},
+               {0x0004, REG_VT_PIX_CLK_DIV},
+               {0x0001, REG_VT_SYS_CLK_DIV},
+               {0x0008, REG_OP_PIX_CLK_DIV},
+               {0x0001, REG_OP_SYS_CLK_DIV},
+               {0x0004, REG_PRE_PLL_CLK_DIV},
+               {0x0040, REG_PLL_MULTIPLIER},
+               {0x0000, REG_GROUPED_PARAMETER_HOLD},
+               {0x0100, REG_GROUPED_PARAMETER_HOLD},
+       };
+       static const struct cmd reg_init_end[] = {
+               {0x0000, REG_GROUPED_PARAMETER_HOLD},
+               {0x0301, 0x31AE},
+               {0x0805, 0x3064},
+               {0x0071, 0x3170},
+               {0x10DE, REG_RESET_REGISTER},
+               {0x0000, REG_MODE_SELECT},
+               {0x0010, REG_PLL_MULTIPLIER},
+               {0x0100, REG_MODE_SELECT},
+       };
+
+       PDEBUG(D_STREAM, "Encrypted begin, w = %u\n", gspca_dev->pixfmt.width);
+       reg_w_buf(gspca_dev, reg_init_begin, ARRAY_SIZE(reg_init_begin));
+       configure_wh(gspca_dev);
+       reg_w_buf(gspca_dev, reg_init_end, ARRAY_SIZE(reg_init_end));
+       reg_w(gspca_dev, 0x0100, REG_GROUPED_PARAMETER_HOLD);
+       reg_w(gspca_dev, 0x0000, REG_GROUPED_PARAMETER_HOLD);
+
+       PDEBUG(D_STREAM, "Encrypted end\n");
+}
+
+static int configure(struct gspca_dev *gspca_dev)
+{
+       int rc;
+       uint8_t buff[4];
+
+       PDEBUG(D_STREAM, "configure()\n");
+
+       /*
+       First driver sets a sort of encryption key
+       A number of futur requests of this type have wValue and wIndex encrypted
+       as follows:
+       -Compute key = this wValue rotate left by 4 bits
+               (decrypt.py rotates right because we are decrypting)
+       -Later packets encrypt packets by XOR'ing with key
+               XOR encrypt/decrypt is symmetrical
+               wValue, and wIndex are encrypted
+               bRequest is not and bRequestType is always 0xC0
+                       This allows resyncing if key is unknown?
+       By setting 0 we XOR with 0 and the shifting and XOR drops out
+       */
+       rc = usb_control_msg(gspca_dev->dev, usb_rcvctrlpipe(gspca_dev->dev, 0),
+                            0x16, 0xC0, 0x0000, 0x0000, buff, 2, 500);
+       if (val_reply(gspca_dev, buff, rc)) {
+               PERR("failed key req");
+               return -EIO;
+       }
+
+       /*
+       Next does some sort of 2 packet challenge / response
+       evidence suggests its an Atmel I2C crypto part but nobody cares to look
+       (to make sure its not cloned hardware?)
+       Ignore: I want to work with their hardware, not clone it
+       16 bytes out challenge, requestType: 0x40
+       16 bytes in response, requestType: 0xC0
+       */
+
+       rc = usb_control_msg(gspca_dev->dev, usb_sndctrlpipe(gspca_dev->dev, 0),
+                            0x01, 0x40, 0x0001, 0x000F, NULL, 0, 500);
+       if (rc < 0) {
+               PERR("failed to replay packet 176 w/ rc %d\n", rc);
+               return rc;
+       }
+
+       rc = usb_control_msg(gspca_dev->dev, usb_sndctrlpipe(gspca_dev->dev, 0),
+                            0x01, 0x40, 0x0000, 0x000F, NULL, 0, 500);
+       if (rc < 0) {
+               PERR("failed to replay packet 178 w/ rc %d\n", rc);
+               return rc;
+       }
+
+       rc = usb_control_msg(gspca_dev->dev, usb_sndctrlpipe(gspca_dev->dev, 0),
+                            0x01, 0x40, 0x0001, 0x000F, NULL, 0, 500);
+       if (rc < 0) {
+               PERR("failed to replay packet 180 w/ rc %d\n", rc);
+               return rc;
+       }
+
+       /*
+       Serial number?  Doesn't seem to be required
+       cam1: \xE6\x0D\x00\x00, cam2: \x70\x19\x00\x00
+       rc = usb_control_msg(gspca_dev->dev, usb_rcvctrlpipe(gspca_dev->dev, 0),
+                            0x20, 0xC0, 0x0000, 0x0000, buff, 4, 500);
+       */
+
+       /* Large (EEPROM?) read, skip it since no idea what to do with it */
+       gspca_dev->usb_err = 0;
+       configure_encrypted(gspca_dev);
+       if (gspca_dev->usb_err)
+               return gspca_dev->usb_err;
+
+       /* Omitted this by accident, does not work without it */
+       rc = usb_control_msg(gspca_dev->dev, usb_sndctrlpipe(gspca_dev->dev, 0),
+                            0x01, 0x40, 0x0003, 0x000F, NULL, 0, 500);
+       if (rc < 0) {
+               PERR("failed to replay final packet w/ rc %d\n", rc);
+               return rc;
+       }
+
+       PDEBUG(D_STREAM, "Configure complete\n");
+       return 0;
+}
+
+static int sd_config(struct gspca_dev *gspca_dev,
+                    const struct usb_device_id *id)
+{
+       gspca_dev->cam.cam_mode = vga_mode;
+       gspca_dev->cam.nmodes = ARRAY_SIZE(vga_mode);
+
+       /* Yes we want URBs and we want them now! */
+       gspca_dev->cam.no_urb_create = 0;
+       gspca_dev->cam.bulk_nurbs = 4;
+       /* Largest size the windows driver uses */
+       gspca_dev->cam.bulk_size = BULK_SIZE;
+       /* Def need to use bulk transfers */
+       gspca_dev->cam.bulk = 1;
+
+       return 0;
+}
+
+static int sd_start(struct gspca_dev *gspca_dev)
+{
+       struct sd *sd = (struct sd *) gspca_dev;
+       int rc;
+
+       sd->this_f = 0;
+
+       rc = configure(gspca_dev);
+       if (rc < 0) {
+               PERR("Failed configure");
+               return rc;
+       }
+       /* First two frames have messed up gains
+       Drop them to avoid special cases in user apps? */
+       return 0;
+}
+
+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;
+
+       if (len != BULK_SIZE) {
+               /* can we finish a frame? */
+               if (sd->this_f + len == gspca_dev->pixfmt.sizeimage) {
+                       gspca_frame_add(gspca_dev, LAST_PACKET, data, len);
+                       PDEBUG(D_FRAM, "finish frame sz %u/%u w/ len %u\n",
+                                sd->this_f, gspca_dev->pixfmt.sizeimage, len);
+               /* lost some data, discard the frame */
+               } else {
+                       gspca_frame_add(gspca_dev, DISCARD_PACKET, NULL, 0);
+                       PDEBUG(D_FRAM, "abort frame sz %u/%u w/ len %u\n",
+                                sd->this_f, gspca_dev->pixfmt.sizeimage, len);
+               }
+               sd->this_f = 0;
+       } else {
+               if (sd->this_f == 0)
+                       gspca_frame_add(gspca_dev, FIRST_PACKET, data, len);
+               else
+                       gspca_frame_add(gspca_dev, INTER_PACKET, data, len);
+               sd->this_f += len;
+       }
+}
+
+static int sd_init(struct gspca_dev *gspca_dev)
+{
+       return 0;
+}
+
+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_EXPOSURE:
+               setexposure(gspca_dev, ctrl->val);
+               break;
+       case V4L2_CID_GAIN:
+               /* gspca_dev->gain automatically updated */
+               setggain(gspca_dev, gspca_dev->gain->val);
+               break;
+       case V4L2_CID_BLUE_BALANCE:
+               sd->blue->val = ctrl->val;
+               setbgain(gspca_dev, sd->blue->val, gspca_dev->gain->val);
+               break;
+       case V4L2_CID_RED_BALANCE:
+               sd->red->val = ctrl->val;
+               setrgain(gspca_dev, sd->red->val, gspca_dev->gain->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 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);
+
+       gspca_dev->exposure = v4l2_ctrl_new_std(hdl, &sd_ctrl_ops,
+       /* Mostly limited by URB timeouts */
+       /* XXX: make dynamic based on frame rate? */
+               V4L2_CID_EXPOSURE, 0, 800, 1, 350);
+       gspca_dev->gain = v4l2_ctrl_new_std(hdl, &sd_ctrl_ops,
+                       V4L2_CID_GAIN, 0, 511, 1, 128);
+       sd->blue = v4l2_ctrl_new_std(hdl, &sd_ctrl_ops,
+                       V4L2_CID_BLUE_BALANCE, 0, 1023, 1, 80);
+       sd->red = v4l2_ctrl_new_std(hdl, &sd_ctrl_ops,
+                       V4L2_CID_RED_BALANCE, 0, 1023, 1, 295);
+
+       if (hdl->error) {
+               PERR("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,
+       .pkt_scan = sd_pkt_scan,
+};
+
+/* Table of supported USB devices */
+static const struct usb_device_id device_table[] = {
+       /* Commented out devices should be related */
+       /* AS: AmScope, TT: ToupTek */
+       /* { USB_DEVICE(0x0547, 0x6035) },  TT UCMOS00350KPA */
+       /* { USB_DEVICE(0x0547, 0x6130) },  TT UCMOS01300KPA */
+       /* { USB_DEVICE(0x0547, 0x6200) },  TT UCMOS02000KPA */
+       /* { USB_DEVICE(0x0547, 0x6310) },  TT UCMOS03100KPA */
+       /* { USB_DEVICE(0x0547, 0x6510) },  TT UCMOS05100KPA */
+       /* { USB_DEVICE(0x0547, 0x6800) },  TT UCMOS08000KPA */
+       /* { USB_DEVICE(0x0547, 0x6801) },  TT UCMOS08000KPB */
+       { USB_DEVICE(0x0547, 0x6801) }, /* TT UCMOS08000KPB, AS MU800 */
+       /* { USB_DEVICE(0x0547, 0x6900) },  TT UCMOS09000KPA */
+       /* { USB_DEVICE(0x0547, 0x6901) },  TT UCMOS09000KPB */
+       /* { USB_DEVICE(0x0547, 0x6010) },  TT UCMOS10000KPA */
+       /* { USB_DEVICE(0x0547, 0x6014) },  TT UCMOS14000KPA */
+       /* { USB_DEVICE(0x0547, 0x6131) },  TT UCMOS01300KMA */
+       /* { USB_DEVICE(0x0547, 0x6511) },  TT UCMOS05100KMA */
+       /* { USB_DEVICE(0x0547, 0x8080) },  TT UHCCD00800KPA */
+       /* { USB_DEVICE(0x0547, 0x8140) },  TT UHCCD01400KPA */
+       /* { USB_DEVICE(0x0547, 0x8141) },  TT EXCCD01400KPA */
+       /* { USB_DEVICE(0x0547, 0x8200) },  TT UHCCD02000KPA */
+       /* { USB_DEVICE(0x0547, 0x8201) },  TT UHCCD02000KPB */
+       /* { USB_DEVICE(0x0547, 0x8310) },  TT UHCCD03100KPA */
+       /* { USB_DEVICE(0x0547, 0x8500) },  TT UHCCD05000KPA */
+       /* { USB_DEVICE(0x0547, 0x8510) },  TT UHCCD05100KPA */
+       /* { USB_DEVICE(0x0547, 0x8600) },  TT UHCCD06000KPA */
+       /* { USB_DEVICE(0x0547, 0x8800) },  TT UHCCD08000KPA */
+       /* { USB_DEVICE(0x0547, 0x8315) },  TT UHCCD03150KPA */
+       /* { USB_DEVICE(0x0547, 0x7800) },  TT UHCCD00800KMA */
+       /* { USB_DEVICE(0x0547, 0x7140) },  TT UHCCD01400KMA */
+       /* { USB_DEVICE(0x0547, 0x7141) },  TT UHCCD01400KMB */
+       /* { USB_DEVICE(0x0547, 0x7200) },  TT UHCCD02000KMA */
+       /* { USB_DEVICE(0x0547, 0x7315) },  TT UHCCD03150KMA */
+       { }
+};
+MODULE_DEVICE_TABLE(usb, device_table);
+
+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,
+#endif
+};
+
+static int __init sd_mod_init(void)
+{
+       int ret;
+
+       ret = usb_register(&sd_driver);
+       if (ret < 0)
+               return ret;
+       return 0;
+}
+static void __exit sd_mod_exit(void)
+{
+       usb_deregister(&sd_driver);
+}
+
+module_init(sd_mod_init);
+module_exit(sd_mod_exit);