drivers/media/usb/gspca/stv06xx/stv06xx_vv6410.c

   1 /*
   2  * Copyright (c) 2001 Jean-Fredric Clere, Nikolas Zimmermann, Georg Acher
   3  *                    Mark Cave-Ayland, Carlo E Prelz, Dick Streefland
   4  * Copyright (c) 2002, 2003 Tuukka Toivonen
   5  * Copyright (c) 2008 Erik Andrén
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License as published by
   9  * the Free Software Foundation; either version 2 of the License, or
  10  * (at your option) any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU General Public License for more details.
  16  *
  17  * P/N 861037:      Sensor HDCS1000        ASIC STV0600
  18  * P/N 861050-0010: Sensor HDCS1000        ASIC STV0600
  19  * P/N 861050-0020: Sensor Photobit PB100  ASIC STV0600-1 - QuickCam Express
  20  * P/N 861055:      Sensor ST VV6410       ASIC STV0610   - LEGO cam
  21  * P/N 861075-0040: Sensor HDCS1000        ASIC
  22  * P/N 961179-0700: Sensor ST VV6410       ASIC STV0602   - Dexxa WebCam USB
  23  * P/N 861040-0000: Sensor ST VV6410       ASIC STV0610   - QuickCam Web
  24  */
  25
  26 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  27
  28 #include "stv06xx_vv6410.h"
  29
  30 static struct v4l2_pix_format vv6410_mode[] = {
  31         {
  32                 356,
  33                 292,
  34                 V4L2_PIX_FMT_SGRBG8,
  35                 V4L2_FIELD_NONE,
  36                 .sizeimage = 356 * 292,
  37                 .bytesperline = 356,
  38                 .colorspace = V4L2_COLORSPACE_SRGB,
  39                 .priv = 0
  40         }
  41 };
  42
  43 static int vv6410_s_ctrl(struct v4l2_ctrl *ctrl)
  44 {
  45         struct gspca_dev *gspca_dev =
  46                 container_of(ctrl->handler, struct gspca_dev, ctrl_handler);
  47         int err = -EINVAL;
  48
  49         switch (ctrl->id) {
  50         case V4L2_CID_HFLIP:
  51                 if (!gspca_dev->streaming)
  52                         return 0;
  53                 err = vv6410_set_hflip(gspca_dev, ctrl->val);
  54                 break;
  55         case V4L2_CID_VFLIP:
  56                 if (!gspca_dev->streaming)
  57                         return 0;
  58                 err = vv6410_set_vflip(gspca_dev, ctrl->val);
  59                 break;
  60         case V4L2_CID_GAIN:
  61                 err = vv6410_set_analog_gain(gspca_dev, ctrl->val);
  62                 break;
  63         case V4L2_CID_EXPOSURE:
  64                 err = vv6410_set_exposure(gspca_dev, ctrl->val);
  65                 break;
  66         }
  67         return err;
  68 }
  69
  70 static const struct v4l2_ctrl_ops vv6410_ctrl_ops = {
  71         .s_ctrl = vv6410_s_ctrl,
  72 };
  73
  74 static int vv6410_probe(struct sd *sd)
  75 {
  76         u16 data;
  77         int err;
  78
  79         err = stv06xx_read_sensor(sd, VV6410_DEVICEH, &data);
  80         if (err < 0)
  81                 return -ENODEV;
  82
  83         if (data != 0x19)
  84                 return -ENODEV;
  85
  86         pr_info("vv6410 sensor detected\n");
  87
  88         sd->gspca_dev.cam.cam_mode = vv6410_mode;
  89         sd->gspca_dev.cam.nmodes = ARRAY_SIZE(vv6410_mode);
  90         return 0;
  91 }
  92
  93 static int vv6410_init_controls(struct sd *sd)
  94 {
  95         struct v4l2_ctrl_handler *hdl = &sd->gspca_dev.ctrl_handler;
  96
  97         v4l2_ctrl_handler_init(hdl, 2);
  98         /* Disable the hardware VFLIP and HFLIP as we currently lack a
  99            mechanism to adjust the image offset in such a way that
 100            we don't need to renegotiate the announced format */
 101         /* v4l2_ctrl_new_std(hdl, &vv6410_ctrl_ops, */
 102         /*              V4L2_CID_HFLIP, 0, 1, 1, 0); */
 103         /* v4l2_ctrl_new_std(hdl, &vv6410_ctrl_ops, */
 104         /*              V4L2_CID_VFLIP, 0, 1, 1, 0); */
 105         v4l2_ctrl_new_std(hdl, &vv6410_ctrl_ops,
 106                         V4L2_CID_EXPOSURE, 0, 32768, 1, 20000);
 107         v4l2_ctrl_new_std(hdl, &vv6410_ctrl_ops,
 108                         V4L2_CID_GAIN, 0, 15, 1, 10);
 109         return hdl->error;
 110 }
 111
 112 static int vv6410_init(struct sd *sd)
 113 {
 114         int err = 0, i;
 115
 116         for (i = 0; i < ARRAY_SIZE(stv_bridge_init); i++)
 117                 stv06xx_write_bridge(sd, stv_bridge_init[i].addr, stv_bridge_init[i].data);
 118
 119         err = stv06xx_write_sensor_bytes(sd, (u8 *) vv6410_sensor_init,
 120                                          ARRAY_SIZE(vv6410_sensor_init));
 121         return (err < 0) ? err : 0;
 122 }
 123
 124 static int vv6410_start(struct sd *sd)
 125 {
 126         int err;
 127         struct gspca_dev *gspca_dev = (struct gspca_dev *)sd;
 128         struct cam *cam = &sd->gspca_dev.cam;
 129         u32 priv = cam->cam_mode[sd->gspca_dev.curr_mode].priv;
 130
 131         if (priv & VV6410_SUBSAMPLE) {
 132                 gspca_dbg(gspca_dev, D_CONF, "Enabling subsampling\n");
 133                 stv06xx_write_bridge(sd, STV_Y_CTRL, 0x02);
 134                 stv06xx_write_bridge(sd, STV_X_CTRL, 0x06);
 135
 136                 stv06xx_write_bridge(sd, STV_SCAN_RATE, 0x10);
 137         } else {
 138                 stv06xx_write_bridge(sd, STV_Y_CTRL, 0x01);
 139                 stv06xx_write_bridge(sd, STV_X_CTRL, 0x0a);
 140                 stv06xx_write_bridge(sd, STV_SCAN_RATE, 0x00);
 141
 142         }
 143
 144         /* Turn on LED */
 145         err = stv06xx_write_bridge(sd, STV_LED_CTRL, LED_ON);
 146         if (err < 0)
 147                 return err;
 148
 149         err = stv06xx_write_sensor(sd, VV6410_SETUP0, 0);
 150         if (err < 0)
 151                 return err;
 152
 153         gspca_dbg(gspca_dev, D_STREAM, "Starting stream\n");
 154
 155         return 0;
 156 }
 157
 158 static int vv6410_stop(struct sd *sd)
 159 {
 160         struct gspca_dev *gspca_dev = (struct gspca_dev *)sd;
 161         int err;
 162
 163         /* Turn off LED */
 164         err = stv06xx_write_bridge(sd, STV_LED_CTRL, LED_OFF);
 165         if (err < 0)
 166                 return err;
 167
 168         err = stv06xx_write_sensor(sd, VV6410_SETUP0, VV6410_LOW_POWER_MODE);
 169         if (err < 0)
 170                 return err;
 171
 172         gspca_dbg(gspca_dev, D_STREAM, "Halting stream\n");
 173
 174         return 0;
 175 }
 176
 177 static int vv6410_dump(struct sd *sd)
 178 {
 179         u8 i;
 180         int err = 0;
 181
 182         pr_info("Dumping all vv6410 sensor registers\n");
 183         for (i = 0; i < 0xff && !err; i++) {
 184                 u16 data;
 185                 err = stv06xx_read_sensor(sd, i, &data);
 186                 pr_info("Register 0x%x contained 0x%x\n", i, data);
 187         }
 188         return (err < 0) ? err : 0;
 189 }
 190
 191 static int vv6410_set_hflip(struct gspca_dev *gspca_dev, __s32 val)
 192 {
 193         int err;
 194         u16 i2c_data;
 195         struct sd *sd = (struct sd *) gspca_dev;
 196
 197         err = stv06xx_read_sensor(sd, VV6410_DATAFORMAT, &i2c_data);
 198         if (err < 0)
 199                 return err;
 200
 201         if (val)
 202                 i2c_data |= VV6410_HFLIP;
 203         else
 204                 i2c_data &= ~VV6410_HFLIP;
 205
 206         gspca_dbg(gspca_dev, D_CONF, "Set horizontal flip to %d\n", val);
 207         err = stv06xx_write_sensor(sd, VV6410_DATAFORMAT, i2c_data);
 208
 209         return (err < 0) ? err : 0;
 210 }
 211
 212 static int vv6410_set_vflip(struct gspca_dev *gspca_dev, __s32 val)
 213 {
 214         int err;
 215         u16 i2c_data;
 216         struct sd *sd = (struct sd *) gspca_dev;
 217
 218         err = stv06xx_read_sensor(sd, VV6410_DATAFORMAT, &i2c_data);
 219         if (err < 0)
 220                 return err;
 221
 222         if (val)
 223                 i2c_data |= VV6410_VFLIP;
 224         else
 225                 i2c_data &= ~VV6410_VFLIP;
 226
 227         gspca_dbg(gspca_dev, D_CONF, "Set vertical flip to %d\n", val);
 228         err = stv06xx_write_sensor(sd, VV6410_DATAFORMAT, i2c_data);
 229
 230         return (err < 0) ? err : 0;
 231 }
 232
 233 static int vv6410_set_analog_gain(struct gspca_dev *gspca_dev, __s32 val)
 234 {
 235         int err;
 236         struct sd *sd = (struct sd *) gspca_dev;
 237
 238         gspca_dbg(gspca_dev, D_CONF, "Set analog gain to %d\n", val);
 239         err = stv06xx_write_sensor(sd, VV6410_ANALOGGAIN, 0xf0 | (val & 0xf));
 240
 241         return (err < 0) ? err : 0;
 242 }
 243
 244 static int vv6410_set_exposure(struct gspca_dev *gspca_dev, __s32 val)
 245 {
 246         int err;
 247         struct sd *sd = (struct sd *) gspca_dev;
 248         unsigned int fine, coarse;
 249
 250         val = (val * val >> 14) + val / 4;
 251
 252         fine = val % VV6410_CIF_LINELENGTH;
 253         coarse = min(512, val / VV6410_CIF_LINELENGTH);
 254
 255         gspca_dbg(gspca_dev, D_CONF, "Set coarse exposure to %d, fine exposure to %d\n",
 256                   coarse, fine);
 257
 258         err = stv06xx_write_sensor(sd, VV6410_FINEH, fine >> 8);
 259         if (err < 0)
 260                 goto out;
 261
 262         err = stv06xx_write_sensor(sd, VV6410_FINEL, fine & 0xff);
 263         if (err < 0)
 264                 goto out;
 265
 266         err = stv06xx_write_sensor(sd, VV6410_COARSEH, coarse >> 8);
 267         if (err < 0)
 268                 goto out;
 269
 270         err = stv06xx_write_sensor(sd, VV6410_COARSEL, coarse & 0xff);
 271
 272 out:
 273         return err;
 274 }