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SubjectRe: [PATCH] [media] gspca_touptek: Add support for ToupTek UCMOS series USB cameras
Hi John,

On 01-12-14 03:27, John McMaster wrote:
> Adds support for AmScope MU800 / ToupTek UCMOS08000KPB USB microscope camera.
>
> Signed-off-by: John McMaster <johndmcmaster@gmail.com>

Thanks, I've added this driver to my gspca tree, and asked Mauro to
queue it up for 3.20.

Regards,

Hans

> ---
> drivers/media/usb/gspca/Kconfig | 10 +
> drivers/media/usb/gspca/Makefile | 2 +
> drivers/media/usb/gspca/touptek.c | 729 +++++++++++++++++++++++++++++++++++++
> 3 files changed, 741 insertions(+)
> create mode 100644 drivers/media/usb/gspca/touptek.c
>
> diff --git a/drivers/media/usb/gspca/Kconfig b/drivers/media/usb/gspca/Kconfig
> index eed10d7..60af3b1 100644
> --- a/drivers/media/usb/gspca/Kconfig
> +++ b/drivers/media/usb/gspca/Kconfig
> @@ -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
> diff --git a/drivers/media/usb/gspca/Makefile b/drivers/media/usb/gspca/Makefile
> index f46975e..9f5ccec 100644
> --- a/drivers/media/usb/gspca/Makefile
> +++ b/drivers/media/usb/gspca/Makefile
> @@ -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
> index 0000000..2fd876c
> --- /dev/null
> +++ b/drivers/media/usb/gspca/touptek.c
> @@ -0,0 +1,729 @@
> +/*
> + * 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);
> +
> + 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);
> +
>


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