Back to home page

OSCL-LXR
 
 

     

0001 // SPDX-License-Identifier: GPL-2.0-or-later
0002 /*
0003  * ToupTek UCMOS / AmScope MU series camera driver
0004  * TODO: contrast with ScopeTek / AmScope MDC cameras
0005  *
0006  * Copyright (C) 2012-2014 John McMaster <JohnDMcMaster@gmail.com>
0007  *
0008  * Special thanks to Bushing for helping with the decrypt algorithm and
0009  * Sean O'Sullivan / the Rensselaer Center for Open Source
0010  * Software (RCOS) for helping me learn kernel development
0011  */
0012 
0013 #include "gspca.h"
0014 
0015 #define MODULE_NAME "touptek"
0016 
0017 MODULE_AUTHOR("John McMaster");
0018 MODULE_DESCRIPTION("ToupTek UCMOS / Amscope MU microscope camera driver");
0019 MODULE_LICENSE("GPL");
0020 
0021 /*
0022  * Exposure reg is linear with exposure time
0023  * Exposure (sec), E (reg)
0024  * 0.000400, 0x0002
0025  * 0.001000, 0x0005
0026  * 0.005000, 0x0019
0027  * 0.020000, 0x0064
0028  * 0.080000, 0x0190
0029  * 0.400000, 0x07D0
0030  * 1.000000, 0x1388
0031  * 2.000000, 0x2710
0032  *
0033  * Three gain stages
0034  * 0x1000: master channel enable bit
0035  * 0x007F: low gain bits
0036  * 0x0080: medium gain bit
0037  * 0x0100: high gain bit
0038  * gain = enable * (1 + regH) * (1 + regM) * z * regL
0039  *
0040  * Gain implementation
0041  * Want to do something similar to mt9v011.c's set_balance
0042  *
0043  * Gain does not vary with resolution (checked 640x480 vs 1600x1200)
0044  *
0045  * Constant derivation:
0046  *
0047  * Raw data:
0048  * Gain,   GTOP,   B,     R,      GBOT
0049  * 1.00,   0x105C, 0x1068, 0x10C8, 0x105C
0050  * 1.20,   0x106E, 0x107E, 0x10D6, 0x106E
0051  * 1.40,   0x10C0, 0x10CA, 0x10E5, 0x10C0
0052  * 1.60,   0x10C9, 0x10D4, 0x10F3, 0x10C9
0053  * 1.80,   0x10D2, 0x10DE, 0x11C1, 0x10D2
0054  * 2.00,   0x10DC, 0x10E9, 0x11C8, 0x10DC
0055  * 2.20,   0x10E5, 0x10F3, 0x11CF, 0x10E5
0056  * 2.40,   0x10EE, 0x10FE, 0x11D7, 0x10EE
0057  * 2.60,   0x10F7, 0x11C4, 0x11DE, 0x10F7
0058  * 2.80,   0x11C0, 0x11CA, 0x11E5, 0x11C0
0059  * 3.00,   0x11C5, 0x11CF, 0x11ED, 0x11C5
0060  *
0061  * zR = 0.0069605943152454778
0062  *  about 3/431 = 0.0069605568445475635
0063  * zB = 0.0095695970695970703
0064  *  about 6/627 = 0.0095693779904306216
0065  * zG = 0.010889328063241107
0066  *  about 6/551 = 0.010889292196007259
0067  * about 10 bits for constant + 7 bits for value => at least 17 bit
0068  * intermediate with 32 bit ints should be fine for overflow etc
0069  * Essentially gains are in range 0-0x001FF
0070  *
0071  * However, V4L expects a main gain channel + R and B balance
0072  * To keep things simple for now saturate the values of balance is too high/low
0073  * This isn't really ideal but easy way to fit the Linux model
0074  *
0075  * Converted using gain model turns out to be quite linear:
0076  * Gain, GTOP, B, R, GBOT
0077  * 1.00, 92, 104, 144, 92
0078  * 1.20, 110, 126, 172, 110
0079  * 1.40, 128, 148, 202, 128
0080  * 1.60, 146, 168, 230, 146
0081  * 1.80, 164, 188, 260, 164
0082  * 2.00, 184, 210, 288, 184
0083  * 2.20, 202, 230, 316, 202
0084  * 2.40, 220, 252, 348, 220
0085  * 2.60, 238, 272, 376, 238
0086  * 2.80, 256, 296, 404, 256
0087  * 3.00, 276, 316, 436, 276
0088  *
0089  * Maximum gain is 0x7FF * 2 * 2 => 0x1FFC (8188)
0090  * or about 13 effective bits of gain
0091  * The highest the commercial driver goes in my setup 436
0092  * However, because could *maybe* damage circuits
0093  * limit the gain until have a reason to go higher
0094  * Solution: gain clipped and warning emitted
0095  */
0096 #define GAIN_MAX        511
0097 
0098 /* Frame sync is a short read */
0099 #define BULK_SIZE       0x4000
0100 
0101 /* MT9E001 reg names to give a rough approximation */
0102 #define REG_COARSE_INTEGRATION_TIME_    0x3012
0103 #define REG_GROUPED_PARAMETER_HOLD_ 0x3022
0104 #define REG_MODE_SELECT         0x0100
0105 #define REG_OP_SYS_CLK_DIV      0x030A
0106 #define REG_VT_SYS_CLK_DIV      0x0302
0107 #define REG_PRE_PLL_CLK_DIV     0x0304
0108 #define REG_VT_PIX_CLK_DIV      0x0300
0109 #define REG_OP_PIX_CLK_DIV      0x0308
0110 #define REG_PLL_MULTIPLIER      0x0306
0111 #define REG_COARSE_INTEGRATION_TIME_    0x3012
0112 #define REG_FRAME_LENGTH_LINES      0x0340
0113 #define REG_FRAME_LENGTH_LINES_     0x300A
0114 #define REG_GREEN1_GAIN         0x3056
0115 #define REG_GREEN2_GAIN         0x305C
0116 #define REG_GROUPED_PARAMETER_HOLD  0x0104
0117 #define REG_LINE_LENGTH_PCK_        0x300C
0118 #define REG_MODE_SELECT         0x0100
0119 #define REG_PLL_MULTIPLIER      0x0306
0120 #define REG_READ_MODE           0x3040
0121 #define REG_BLUE_GAIN           0x3058
0122 #define REG_RED_GAIN            0x305A
0123 #define REG_RESET_REGISTER      0x301A
0124 #define REG_SCALE_M         0x0404
0125 #define REG_SCALING_MODE        0x0400
0126 #define REG_SOFTWARE_RESET      0x0103
0127 #define REG_X_ADDR_END          0x0348
0128 #define REG_X_ADDR_START        0x0344
0129 #define REG_X_ADDR_START        0x0344
0130 #define REG_X_OUTPUT_SIZE       0x034C
0131 #define REG_Y_ADDR_END          0x034A
0132 #define REG_Y_ADDR_START        0x0346
0133 #define REG_Y_OUTPUT_SIZE       0x034E
0134 
0135 
0136 /* specific webcam descriptor */
0137 struct sd {
0138     struct gspca_dev gspca_dev; /* !! must be the first item */
0139     /* How many bytes this frame */
0140     unsigned int this_f;
0141 
0142     /*
0143     Device has separate gains for each Bayer quadrant
0144     V4L supports master gain which is referenced to G1/G2 and supplies
0145     individual balance controls for R/B
0146     */
0147     struct v4l2_ctrl *blue;
0148     struct v4l2_ctrl *red;
0149 };
0150 
0151 /* Used to simplify reg write error handling */
0152 struct cmd {
0153     u16 value;
0154     u16 index;
0155 };
0156 
0157 static const struct v4l2_pix_format vga_mode[] = {
0158     {800, 600,
0159         V4L2_PIX_FMT_SGRBG8,
0160         V4L2_FIELD_NONE,
0161         .bytesperline = 800,
0162         .sizeimage = 800 * 600,
0163         .colorspace = V4L2_COLORSPACE_SRGB},
0164     {1600, 1200,
0165         V4L2_PIX_FMT_SGRBG8,
0166         V4L2_FIELD_NONE,
0167         .bytesperline = 1600,
0168         .sizeimage = 1600 * 1200,
0169         .colorspace = V4L2_COLORSPACE_SRGB},
0170     {3264, 2448,
0171         V4L2_PIX_FMT_SGRBG8,
0172         V4L2_FIELD_NONE,
0173         .bytesperline = 3264,
0174         .sizeimage = 3264 * 2448,
0175         .colorspace = V4L2_COLORSPACE_SRGB},
0176 };
0177 
0178 /*
0179  * As there's no known frame sync, the only way to keep synced is to try hard
0180  * to never miss any packets
0181  */
0182 #if MAX_NURBS < 4
0183 #error "Not enough URBs in the gspca table"
0184 #endif
0185 
0186 static int val_reply(struct gspca_dev *gspca_dev, const char *reply, int rc)
0187 {
0188     if (rc < 0) {
0189         gspca_err(gspca_dev, "reply has error %d\n", rc);
0190         return -EIO;
0191     }
0192     if (rc != 1) {
0193         gspca_err(gspca_dev, "Bad reply size %d\n", rc);
0194         return -EIO;
0195     }
0196     if (reply[0] != 0x08) {
0197         gspca_err(gspca_dev, "Bad reply 0x%02x\n", (int)reply[0]);
0198         return -EIO;
0199     }
0200     return 0;
0201 }
0202 
0203 static void reg_w(struct gspca_dev *gspca_dev, u16 value, u16 index)
0204 {
0205     char *buff = gspca_dev->usb_buf;
0206     int rc;
0207 
0208     gspca_dbg(gspca_dev, D_USBO,
0209           "reg_w bReq=0x0B, bReqT=0xC0, wVal=0x%04X, wInd=0x%04X\n\n",
0210           value, index);
0211     rc = usb_control_msg(gspca_dev->dev, usb_rcvctrlpipe(gspca_dev->dev, 0),
0212         0x0B, 0xC0, value, index, buff, 1, 500);
0213     gspca_dbg(gspca_dev, D_USBO, "rc=%d, ret={0x%02x}\n", rc, (int)buff[0]);
0214     if (rc < 0) {
0215         gspca_err(gspca_dev, "Failed reg_w(0x0B, 0xC0, 0x%04X, 0x%04X) w/ rc %d\n",
0216               value, index, rc);
0217         gspca_dev->usb_err = rc;
0218         return;
0219     }
0220     if (val_reply(gspca_dev, buff, rc)) {
0221         gspca_err(gspca_dev, "Bad reply to reg_w(0x0B, 0xC0, 0x%04X, 0x%04X\n",
0222               value, index);
0223         gspca_dev->usb_err = -EIO;
0224     }
0225 }
0226 
0227 static void reg_w_buf(struct gspca_dev *gspca_dev,
0228         const struct cmd *p, int l)
0229 {
0230     do {
0231         reg_w(gspca_dev, p->value, p->index);
0232         p++;
0233     } while (--l > 0);
0234 }
0235 
0236 static void setexposure(struct gspca_dev *gspca_dev, s32 val)
0237 {
0238     u16 value;
0239     unsigned int w = gspca_dev->pixfmt.width;
0240 
0241     if (w == 800)
0242         value = val * 5;
0243     else if (w == 1600)
0244         value = val * 3;
0245     else if (w == 3264)
0246         value = val * 3 / 2;
0247     else {
0248         gspca_err(gspca_dev, "Invalid width %u\n", w);
0249         gspca_dev->usb_err = -EINVAL;
0250         return;
0251     }
0252     gspca_dbg(gspca_dev, D_STREAM, "exposure: 0x%04X ms\n\n", value);
0253     /* Wonder if there's a good reason for sending it twice */
0254     /* probably not but leave it in because...why not */
0255     reg_w(gspca_dev, value, REG_COARSE_INTEGRATION_TIME_);
0256     reg_w(gspca_dev, value, REG_COARSE_INTEGRATION_TIME_);
0257 }
0258 
0259 static int gainify(int in)
0260 {
0261     /*
0262      * TODO: check if there are any issues with corner cases
0263      * 0x000 (0):0x07F (127): regL
0264      * 0x080 (128) - 0x0FF (255): regM, regL
0265      * 0x100 (256) - max: regH, regM, regL
0266      */
0267     if (in <= 0x7F)
0268         return 0x1000 | in;
0269     else if (in <= 0xFF)
0270         return 0x1080 | in / 2;
0271     else
0272         return 0x1180 | in / 4;
0273 }
0274 
0275 static void setggain(struct gspca_dev *gspca_dev, u16 global_gain)
0276 {
0277     u16 normalized;
0278 
0279     normalized = gainify(global_gain);
0280     gspca_dbg(gspca_dev, D_STREAM, "gain G1/G2 (0x%04X): 0x%04X (src 0x%04X)\n\n",
0281           REG_GREEN1_GAIN,
0282           normalized, global_gain);
0283 
0284     reg_w(gspca_dev, normalized, REG_GREEN1_GAIN);
0285     reg_w(gspca_dev, normalized, REG_GREEN2_GAIN);
0286 }
0287 
0288 static void setbgain(struct gspca_dev *gspca_dev,
0289         u16 gain, u16 global_gain)
0290 {
0291     u16 normalized;
0292 
0293     normalized = global_gain +
0294         ((u32)global_gain) * gain / GAIN_MAX;
0295     if (normalized > GAIN_MAX) {
0296         gspca_dbg(gspca_dev, D_STREAM, "Truncating blue 0x%04X w/ value 0x%04X\n\n",
0297               GAIN_MAX, normalized);
0298         normalized = GAIN_MAX;
0299     }
0300     normalized = gainify(normalized);
0301     gspca_dbg(gspca_dev, D_STREAM, "gain B (0x%04X): 0x%04X w/ source 0x%04X\n\n",
0302           REG_BLUE_GAIN, normalized, gain);
0303 
0304     reg_w(gspca_dev, normalized, REG_BLUE_GAIN);
0305 }
0306 
0307 static void setrgain(struct gspca_dev *gspca_dev,
0308         u16 gain, u16 global_gain)
0309 {
0310     u16 normalized;
0311 
0312     normalized = global_gain +
0313         ((u32)global_gain) * gain / GAIN_MAX;
0314     if (normalized > GAIN_MAX) {
0315         gspca_dbg(gspca_dev, D_STREAM, "Truncating gain 0x%04X w/ value 0x%04X\n\n",
0316               GAIN_MAX, normalized);
0317         normalized = GAIN_MAX;
0318     }
0319     normalized = gainify(normalized);
0320     gspca_dbg(gspca_dev, D_STREAM, "gain R (0x%04X): 0x%04X w / source 0x%04X\n\n",
0321           REG_RED_GAIN, normalized, gain);
0322 
0323     reg_w(gspca_dev, normalized, REG_RED_GAIN);
0324 }
0325 
0326 static void configure_wh(struct gspca_dev *gspca_dev)
0327 {
0328     unsigned int w = gspca_dev->pixfmt.width;
0329 
0330     gspca_dbg(gspca_dev, D_STREAM, "configure_wh\n\n");
0331 
0332     if (w == 800) {
0333         static const struct cmd reg_init_res[] = {
0334             {0x0060, REG_X_ADDR_START},
0335             {0x0CD9, REG_X_ADDR_END},
0336             {0x0036, REG_Y_ADDR_START},
0337             {0x098F, REG_Y_ADDR_END},
0338             {0x07C7, REG_READ_MODE},
0339         };
0340 
0341         reg_w_buf(gspca_dev,
0342                    reg_init_res, ARRAY_SIZE(reg_init_res));
0343     } else if (w == 1600) {
0344         static const struct cmd reg_init_res[] = {
0345             {0x009C, REG_X_ADDR_START},
0346             {0x0D19, REG_X_ADDR_END},
0347             {0x0068, REG_Y_ADDR_START},
0348             {0x09C5, REG_Y_ADDR_END},
0349             {0x06C3, REG_READ_MODE},
0350         };
0351 
0352         reg_w_buf(gspca_dev,
0353                    reg_init_res, ARRAY_SIZE(reg_init_res));
0354     } else if (w == 3264) {
0355         static const struct cmd reg_init_res[] = {
0356             {0x00E8, REG_X_ADDR_START},
0357             {0x0DA7, REG_X_ADDR_END},
0358             {0x009E, REG_Y_ADDR_START},
0359             {0x0A2D, REG_Y_ADDR_END},
0360             {0x0241, REG_READ_MODE},
0361         };
0362 
0363         reg_w_buf(gspca_dev,
0364                    reg_init_res, ARRAY_SIZE(reg_init_res));
0365     } else {
0366         gspca_err(gspca_dev, "bad width %u\n", w);
0367         gspca_dev->usb_err = -EINVAL;
0368         return;
0369     }
0370 
0371     reg_w(gspca_dev, 0x0000, REG_SCALING_MODE);
0372     reg_w(gspca_dev, 0x0010, REG_SCALE_M);
0373     reg_w(gspca_dev, w, REG_X_OUTPUT_SIZE);
0374     reg_w(gspca_dev, gspca_dev->pixfmt.height, REG_Y_OUTPUT_SIZE);
0375 
0376     if (w == 800) {
0377         reg_w(gspca_dev, 0x0384, REG_FRAME_LENGTH_LINES_);
0378         reg_w(gspca_dev, 0x0960, REG_LINE_LENGTH_PCK_);
0379     } else if (w == 1600) {
0380         reg_w(gspca_dev, 0x0640, REG_FRAME_LENGTH_LINES_);
0381         reg_w(gspca_dev, 0x0FA0, REG_LINE_LENGTH_PCK_);
0382     } else if (w == 3264) {
0383         reg_w(gspca_dev, 0x0B4B, REG_FRAME_LENGTH_LINES_);
0384         reg_w(gspca_dev, 0x1F40, REG_LINE_LENGTH_PCK_);
0385     } else {
0386         gspca_err(gspca_dev, "bad width %u\n", w);
0387         gspca_dev->usb_err = -EINVAL;
0388         return;
0389     }
0390 }
0391 
0392 /* Packets that were encrypted, no idea if the grouping is significant */
0393 static void configure_encrypted(struct gspca_dev *gspca_dev)
0394 {
0395     static const struct cmd reg_init_begin[] = {
0396         {0x0100, REG_SOFTWARE_RESET},
0397         {0x0000, REG_MODE_SELECT},
0398         {0x0100, REG_GROUPED_PARAMETER_HOLD},
0399         {0x0004, REG_VT_PIX_CLK_DIV},
0400         {0x0001, REG_VT_SYS_CLK_DIV},
0401         {0x0008, REG_OP_PIX_CLK_DIV},
0402         {0x0001, REG_OP_SYS_CLK_DIV},
0403         {0x0004, REG_PRE_PLL_CLK_DIV},
0404         {0x0040, REG_PLL_MULTIPLIER},
0405         {0x0000, REG_GROUPED_PARAMETER_HOLD},
0406         {0x0100, REG_GROUPED_PARAMETER_HOLD},
0407     };
0408     static const struct cmd reg_init_end[] = {
0409         {0x0000, REG_GROUPED_PARAMETER_HOLD},
0410         {0x0301, 0x31AE},
0411         {0x0805, 0x3064},
0412         {0x0071, 0x3170},
0413         {0x10DE, REG_RESET_REGISTER},
0414         {0x0000, REG_MODE_SELECT},
0415         {0x0010, REG_PLL_MULTIPLIER},
0416         {0x0100, REG_MODE_SELECT},
0417     };
0418 
0419     gspca_dbg(gspca_dev, D_STREAM, "Encrypted begin, w = %u\n\n",
0420           gspca_dev->pixfmt.width);
0421     reg_w_buf(gspca_dev, reg_init_begin, ARRAY_SIZE(reg_init_begin));
0422     configure_wh(gspca_dev);
0423     reg_w_buf(gspca_dev, reg_init_end, ARRAY_SIZE(reg_init_end));
0424     reg_w(gspca_dev, 0x0100, REG_GROUPED_PARAMETER_HOLD);
0425     reg_w(gspca_dev, 0x0000, REG_GROUPED_PARAMETER_HOLD);
0426 
0427     gspca_dbg(gspca_dev, D_STREAM, "Encrypted end\n\n");
0428 }
0429 
0430 static int configure(struct gspca_dev *gspca_dev)
0431 {
0432     int rc;
0433     char *buff = gspca_dev->usb_buf;
0434 
0435     gspca_dbg(gspca_dev, D_STREAM, "configure()\n\n");
0436 
0437     /*
0438      * First driver sets a sort of encryption key
0439      * A number of futur requests of this type have wValue and wIndex
0440      * encrypted as follows:
0441      * -Compute key = this wValue rotate left by 4 bits
0442      *  (decrypt.py rotates right because we are decrypting)
0443      * -Later packets encrypt packets by XOR'ing with key
0444      *  XOR encrypt/decrypt is symmetrical
0445      *  wValue, and wIndex are encrypted
0446      *  bRequest is not and bRequestType is always 0xC0
0447      *      This allows resyncing if key is unknown?
0448      * By setting 0 we XOR with 0 and the shifting and XOR drops out
0449      */
0450     rc = usb_control_msg(gspca_dev->dev, usb_rcvctrlpipe(gspca_dev->dev, 0),
0451                  0x16, 0xC0, 0x0000, 0x0000, buff, 2, 500);
0452     if (val_reply(gspca_dev, buff, rc)) {
0453         gspca_err(gspca_dev, "failed key req\n");
0454         return -EIO;
0455     }
0456 
0457     /*
0458      * Next does some sort of 2 packet challenge / response
0459      * evidence suggests its an Atmel I2C crypto part but nobody cares to
0460      * look
0461      * (to make sure its not cloned hardware?)
0462      * Ignore: I want to work with their hardware, not clone it
0463      * 16 bytes out challenge, requestType: 0x40
0464      * 16 bytes in response, requestType: 0xC0
0465      */
0466 
0467     rc = usb_control_msg(gspca_dev->dev, usb_sndctrlpipe(gspca_dev->dev, 0),
0468                  0x01, 0x40, 0x0001, 0x000F, NULL, 0, 500);
0469     if (rc < 0) {
0470         gspca_err(gspca_dev, "failed to replay packet 176 w/ rc %d\n",
0471               rc);
0472         return rc;
0473     }
0474 
0475     rc = usb_control_msg(gspca_dev->dev, usb_sndctrlpipe(gspca_dev->dev, 0),
0476                  0x01, 0x40, 0x0000, 0x000F, NULL, 0, 500);
0477     if (rc < 0) {
0478         gspca_err(gspca_dev, "failed to replay packet 178 w/ rc %d\n",
0479               rc);
0480         return rc;
0481     }
0482 
0483     rc = usb_control_msg(gspca_dev->dev, usb_sndctrlpipe(gspca_dev->dev, 0),
0484                  0x01, 0x40, 0x0001, 0x000F, NULL, 0, 500);
0485     if (rc < 0) {
0486         gspca_err(gspca_dev, "failed to replay packet 180 w/ rc %d\n",
0487               rc);
0488         return rc;
0489     }
0490 
0491     /*
0492      * Serial number?  Doesn't seem to be required
0493      * cam1: \xE6\x0D\x00\x00, cam2: \x70\x19\x00\x00
0494      * rc = usb_control_msg(gspca_dev->dev,
0495      *          usb_rcvctrlpipe(gspca_dev->dev, 0),
0496      *          0x20, 0xC0, 0x0000, 0x0000, buff, 4, 500);
0497      */
0498 
0499     /* Large (EEPROM?) read, skip it since no idea what to do with it */
0500     gspca_dev->usb_err = 0;
0501     configure_encrypted(gspca_dev);
0502     if (gspca_dev->usb_err)
0503         return gspca_dev->usb_err;
0504 
0505     /* Omitted this by accident, does not work without it */
0506     rc = usb_control_msg(gspca_dev->dev, usb_sndctrlpipe(gspca_dev->dev, 0),
0507                  0x01, 0x40, 0x0003, 0x000F, NULL, 0, 500);
0508     if (rc < 0) {
0509         gspca_err(gspca_dev, "failed to replay final packet w/ rc %d\n",
0510               rc);
0511         return rc;
0512     }
0513 
0514     gspca_dbg(gspca_dev, D_STREAM, "Configure complete\n\n");
0515     return 0;
0516 }
0517 
0518 static int sd_config(struct gspca_dev *gspca_dev,
0519              const struct usb_device_id *id)
0520 {
0521     gspca_dev->cam.cam_mode = vga_mode;
0522     gspca_dev->cam.nmodes = ARRAY_SIZE(vga_mode);
0523 
0524     /* Yes we want URBs and we want them now! */
0525     gspca_dev->cam.no_urb_create = 0;
0526     gspca_dev->cam.bulk_nurbs = 4;
0527     /* Largest size the windows driver uses */
0528     gspca_dev->cam.bulk_size = BULK_SIZE;
0529     /* Def need to use bulk transfers */
0530     gspca_dev->cam.bulk = 1;
0531 
0532     return 0;
0533 }
0534 
0535 static int sd_start(struct gspca_dev *gspca_dev)
0536 {
0537     struct sd *sd = (struct sd *) gspca_dev;
0538     int rc;
0539 
0540     sd->this_f = 0;
0541 
0542     rc = configure(gspca_dev);
0543     if (rc < 0) {
0544         gspca_err(gspca_dev, "Failed configure\n");
0545         return rc;
0546     }
0547     /* First two frames have messed up gains
0548     Drop them to avoid special cases in user apps? */
0549     return 0;
0550 }
0551 
0552 static void sd_pkt_scan(struct gspca_dev *gspca_dev,
0553             u8 *data,   /* isoc packet */
0554             int len)    /* iso packet length */
0555 {
0556     struct sd *sd = (struct sd *) gspca_dev;
0557 
0558     if (len != BULK_SIZE) {
0559         /* can we finish a frame? */
0560         if (sd->this_f + len == gspca_dev->pixfmt.sizeimage) {
0561             gspca_frame_add(gspca_dev, LAST_PACKET, data, len);
0562             gspca_dbg(gspca_dev, D_FRAM, "finish frame sz %u/%u w/ len %u\n\n",
0563                   sd->this_f, gspca_dev->pixfmt.sizeimage, len);
0564         /* lost some data, discard the frame */
0565         } else {
0566             gspca_frame_add(gspca_dev, DISCARD_PACKET, NULL, 0);
0567             gspca_dbg(gspca_dev, D_FRAM, "abort frame sz %u/%u w/ len %u\n\n",
0568                   sd->this_f, gspca_dev->pixfmt.sizeimage, len);
0569         }
0570         sd->this_f = 0;
0571     } else {
0572         if (sd->this_f == 0)
0573             gspca_frame_add(gspca_dev, FIRST_PACKET, data, len);
0574         else
0575             gspca_frame_add(gspca_dev, INTER_PACKET, data, len);
0576         sd->this_f += len;
0577     }
0578 }
0579 
0580 static int sd_init(struct gspca_dev *gspca_dev)
0581 {
0582     return 0;
0583 }
0584 
0585 static int sd_s_ctrl(struct v4l2_ctrl *ctrl)
0586 {
0587     struct gspca_dev *gspca_dev =
0588         container_of(ctrl->handler, struct gspca_dev, ctrl_handler);
0589     struct sd *sd = (struct sd *) gspca_dev;
0590 
0591     gspca_dev->usb_err = 0;
0592 
0593     if (!gspca_dev->streaming)
0594         return 0;
0595 
0596     switch (ctrl->id) {
0597     case V4L2_CID_EXPOSURE:
0598         setexposure(gspca_dev, ctrl->val);
0599         break;
0600     case V4L2_CID_GAIN:
0601         /* gspca_dev->gain automatically updated */
0602         setggain(gspca_dev, gspca_dev->gain->val);
0603         break;
0604     case V4L2_CID_BLUE_BALANCE:
0605         sd->blue->val = ctrl->val;
0606         setbgain(gspca_dev, sd->blue->val, gspca_dev->gain->val);
0607         break;
0608     case V4L2_CID_RED_BALANCE:
0609         sd->red->val = ctrl->val;
0610         setrgain(gspca_dev, sd->red->val, gspca_dev->gain->val);
0611         break;
0612     }
0613     return gspca_dev->usb_err;
0614 }
0615 
0616 static const struct v4l2_ctrl_ops sd_ctrl_ops = {
0617     .s_ctrl = sd_s_ctrl,
0618 };
0619 
0620 static int sd_init_controls(struct gspca_dev *gspca_dev)
0621 {
0622     struct sd *sd = (struct sd *) gspca_dev;
0623     struct v4l2_ctrl_handler *hdl = &gspca_dev->ctrl_handler;
0624 
0625     gspca_dev->vdev.ctrl_handler = hdl;
0626     v4l2_ctrl_handler_init(hdl, 4);
0627 
0628     gspca_dev->exposure = v4l2_ctrl_new_std(hdl, &sd_ctrl_ops,
0629     /* Mostly limited by URB timeouts */
0630     /* XXX: make dynamic based on frame rate? */
0631         V4L2_CID_EXPOSURE, 0, 800, 1, 350);
0632     gspca_dev->gain = v4l2_ctrl_new_std(hdl, &sd_ctrl_ops,
0633             V4L2_CID_GAIN, 0, 511, 1, 128);
0634     sd->blue = v4l2_ctrl_new_std(hdl, &sd_ctrl_ops,
0635             V4L2_CID_BLUE_BALANCE, 0, 1023, 1, 80);
0636     sd->red = v4l2_ctrl_new_std(hdl, &sd_ctrl_ops,
0637             V4L2_CID_RED_BALANCE, 0, 1023, 1, 295);
0638 
0639     if (hdl->error) {
0640         gspca_err(gspca_dev, "Could not initialize controls\n");
0641         return hdl->error;
0642     }
0643     return 0;
0644 }
0645 
0646 /* sub-driver description */
0647 static const struct sd_desc sd_desc = {
0648     .name = MODULE_NAME,
0649     .config = sd_config,
0650     .init = sd_init,
0651     .init_controls = sd_init_controls,
0652     .start = sd_start,
0653     .pkt_scan = sd_pkt_scan,
0654 };
0655 
0656 /* Table of supported USB devices */
0657 static const struct usb_device_id device_table[] = {
0658     /* Commented out devices should be related */
0659     /* AS: AmScope, TT: ToupTek */
0660     /* { USB_DEVICE(0x0547, 0x6035) },  TT UCMOS00350KPA */
0661     /* { USB_DEVICE(0x0547, 0x6130) },  TT UCMOS01300KPA */
0662     /* { USB_DEVICE(0x0547, 0x6200) },  TT UCMOS02000KPA */
0663     /* { USB_DEVICE(0x0547, 0x6310) },  TT UCMOS03100KPA */
0664     /* { USB_DEVICE(0x0547, 0x6510) },  TT UCMOS05100KPA */
0665     /* { USB_DEVICE(0x0547, 0x6800) },  TT UCMOS08000KPA */
0666     /* { USB_DEVICE(0x0547, 0x6801) },  TT UCMOS08000KPB */
0667     { USB_DEVICE(0x0547, 0x6801) }, /* TT UCMOS08000KPB, AS MU800 */
0668     /* { USB_DEVICE(0x0547, 0x6900) },  TT UCMOS09000KPA */
0669     /* { USB_DEVICE(0x0547, 0x6901) },  TT UCMOS09000KPB */
0670     /* { USB_DEVICE(0x0547, 0x6010) },  TT UCMOS10000KPA */
0671     /* { USB_DEVICE(0x0547, 0x6014) },  TT UCMOS14000KPA */
0672     /* { USB_DEVICE(0x0547, 0x6131) },  TT UCMOS01300KMA */
0673     /* { USB_DEVICE(0x0547, 0x6511) },  TT UCMOS05100KMA */
0674     /* { USB_DEVICE(0x0547, 0x8080) },  TT UHCCD00800KPA */
0675     /* { USB_DEVICE(0x0547, 0x8140) },  TT UHCCD01400KPA */
0676     /* { USB_DEVICE(0x0547, 0x8141) },  TT EXCCD01400KPA */
0677     /* { USB_DEVICE(0x0547, 0x8200) },  TT UHCCD02000KPA */
0678     /* { USB_DEVICE(0x0547, 0x8201) },  TT UHCCD02000KPB */
0679     /* { USB_DEVICE(0x0547, 0x8310) },  TT UHCCD03100KPA */
0680     /* { USB_DEVICE(0x0547, 0x8500) },  TT UHCCD05000KPA */
0681     /* { USB_DEVICE(0x0547, 0x8510) },  TT UHCCD05100KPA */
0682     /* { USB_DEVICE(0x0547, 0x8600) },  TT UHCCD06000KPA */
0683     /* { USB_DEVICE(0x0547, 0x8800) },  TT UHCCD08000KPA */
0684     /* { USB_DEVICE(0x0547, 0x8315) },  TT UHCCD03150KPA */
0685     /* { USB_DEVICE(0x0547, 0x7800) },  TT UHCCD00800KMA */
0686     /* { USB_DEVICE(0x0547, 0x7140) },  TT UHCCD01400KMA */
0687     /* { USB_DEVICE(0x0547, 0x7141) },  TT UHCCD01400KMB */
0688     /* { USB_DEVICE(0x0547, 0x7200) },  TT UHCCD02000KMA */
0689     /* { USB_DEVICE(0x0547, 0x7315) },  TT UHCCD03150KMA */
0690     { }
0691 };
0692 MODULE_DEVICE_TABLE(usb, device_table);
0693 
0694 static int sd_probe(struct usb_interface *intf,
0695             const struct usb_device_id *id)
0696 {
0697     return gspca_dev_probe(intf, id, &sd_desc, sizeof(struct sd),
0698                  THIS_MODULE);
0699 }
0700 
0701 static struct usb_driver sd_driver = {
0702     .name = MODULE_NAME,
0703     .id_table = device_table,
0704     .probe = sd_probe,
0705     .disconnect = gspca_disconnect,
0706 #ifdef CONFIG_PM
0707     .suspend = gspca_suspend,
0708     .resume = gspca_resume,
0709 #endif
0710 };
0711 
0712 static int __init sd_mod_init(void)
0713 {
0714     int ret;
0715 
0716     ret = usb_register(&sd_driver);
0717     if (ret < 0)
0718         return ret;
0719     return 0;
0720 }
0721 static void __exit sd_mod_exit(void)
0722 {
0723     usb_deregister(&sd_driver);
0724 }
0725 
0726 module_init(sd_mod_init);
0727 module_exit(sd_mod_exit);
[ Source navigation ] [ Diff markup ] [ Identifier search ] [ general search ]

This page was automatically generated by the 2.1.0 LXR engine.

The LXR team
Valid CSS 2.1! Valid HTML 4.01!