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  * You should have received a copy of the GNU General Public License
  18  * along with this program; if not, write to the Free Software
  19  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  20  *
  21  * P/N 861037:      Sensor HDCS1000        ASIC STV0600
  22  * P/N 861050-0010: Sensor HDCS1000        ASIC STV0600
  23  * P/N 861050-0020: Sensor Photobit PB100  ASIC STV0600-1 - QuickCam Express
  24  * P/N 861055:      Sensor ST VV6410       ASIC STV0610   - LEGO cam
  25  * P/N 861075-0040: Sensor HDCS1000        ASIC
  26  * P/N 961179-0700: Sensor ST VV6410       ASIC STV0602   - Dexxa WebCam USB
  27  * P/N 861040-0000: Sensor ST VV6410       ASIC STV0610   - QuickCam Web
  28  */
  29
  30 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  31
  32 #include "stv06xx_vv6410.h"
  33
  34 static struct v4l2_pix_format vv6410_mode[] = {
  35         {
  36                 356,
  37                 292,
  38                 V4L2_PIX_FMT_SGRBG8,
  39                 V4L2_FIELD_NONE,
  40                 .sizeimage = 356 * 292,
  41                 .bytesperline = 356,
  42                 .colorspace = V4L2_COLORSPACE_SRGB,
  43                 .priv = 0
  44         }
  45 };
  46
  47 static int vv6410_s_ctrl(struct v4l2_ctrl *ctrl)
  48 {
  49         struct gspca_dev *gspca_dev =
  50                 container_of(ctrl->handler, struct gspca_dev, ctrl_handler);
  51         int err = -EINVAL;
  52
  53         switch (ctrl->id) {
  54         case V4L2_CID_HFLIP:
  55                 if (!gspca_dev->streaming)
  56                         return 0;
  57                 err = vv6410_set_hflip(gspca_dev, ctrl->val);
  58                 break;
  59         case V4L2_CID_VFLIP:
  60                 if (!gspca_dev->streaming)
  61                         return 0;
  62                 err = vv6410_set_vflip(gspca_dev, ctrl->val);
  63                 break;
  64         case V4L2_CID_GAIN:
  65                 err = vv6410_set_analog_gain(gspca_dev, ctrl->val);
  66                 break;
  67         case V4L2_CID_EXPOSURE:
  68                 err = vv6410_set_exposure(gspca_dev, ctrl->val);
  69                 break;
  70         }
  71         return err;
  72 }
  73
  74 static const struct v4l2_ctrl_ops vv6410_ctrl_ops = {
  75         .s_ctrl = vv6410_s_ctrl,
  76 };
  77
  78 static int vv6410_probe(struct sd *sd)
  79 {
  80         u16 data;
  81         int err;
  82
  83         err = stv06xx_read_sensor(sd, VV6410_DEVICEH, &data);
  84         if (err < 0)
  85                 return -ENODEV;
  86
  87         if (data != 0x19)
  88                 return -ENODEV;
  89
  90         pr_info("vv6410 sensor detected\n");
  91
  92         sd->gspca_dev.cam.cam_mode = vv6410_mode;
  93         sd->gspca_dev.cam.nmodes = ARRAY_SIZE(vv6410_mode);
  94         return 0;
  95 }
  96
  97 static int vv6410_init_controls(struct sd *sd)
  98 {
  99         struct v4l2_ctrl_handler *hdl = &sd->gspca_dev.ctrl_handler;
 100
 101         v4l2_ctrl_handler_init(hdl, 2);
 102         /* Disable the hardware VFLIP and HFLIP as we currently lack a
 103            mechanism to adjust the image offset in such a way that
 104            we don't need to renegotiate the announced format */
 105         /* v4l2_ctrl_new_std(hdl, &vv6410_ctrl_ops, */
 106         /*              V4L2_CID_HFLIP, 0, 1, 1, 0); */
 107         /* v4l2_ctrl_new_std(hdl, &vv6410_ctrl_ops, */
 108         /*              V4L2_CID_VFLIP, 0, 1, 1, 0); */
 109         v4l2_ctrl_new_std(hdl, &vv6410_ctrl_ops,
 110                         V4L2_CID_EXPOSURE, 0, 32768, 1, 20000);
 111         v4l2_ctrl_new_std(hdl, &vv6410_ctrl_ops,
 112                         V4L2_CID_GAIN, 0, 15, 1, 10);
 113         return hdl->error;
 114 }
 115
 116 static int vv6410_init(struct sd *sd)
 117 {
 118         int err = 0, i;
 119
 120         for (i = 0; i < ARRAY_SIZE(stv_bridge_init); i++)
 121                 stv06xx_write_bridge(sd, stv_bridge_init[i].addr, stv_bridge_init[i].data);
 122
 123         if (err < 0)
 124                 return err;
 125
 126         err = stv06xx_write_sensor_bytes(sd, (u8 *) vv6410_sensor_init,
 127                                          ARRAY_SIZE(vv6410_sensor_init));
 128         return (err < 0) ? err : 0;
 129 }
 130
 131 static int vv6410_start(struct sd *sd)
 132 {
 133         int err;
 134         struct gspca_dev *gspca_dev = (struct gspca_dev *)sd;
 135         struct cam *cam = &sd->gspca_dev.cam;
 136         u32 priv = cam->cam_mode[sd->gspca_dev.curr_mode].priv;
 137
 138         if (priv & VV6410_SUBSAMPLE) {
 139                 PDEBUG(D_CONF, "Enabling subsampling");
 140                 stv06xx_write_bridge(sd, STV_Y_CTRL, 0x02);
 141                 stv06xx_write_bridge(sd, STV_X_CTRL, 0x06);
 142
 143                 stv06xx_write_bridge(sd, STV_SCAN_RATE, 0x10);
 144         } else {
 145                 stv06xx_write_bridge(sd, STV_Y_CTRL, 0x01);
 146                 stv06xx_write_bridge(sd, STV_X_CTRL, 0x0a);
 147                 stv06xx_write_bridge(sd, STV_SCAN_RATE, 0x00);
 148
 149         }
 150
 151         /* Turn on LED */
 152         err = stv06xx_write_bridge(sd, STV_LED_CTRL, LED_ON);
 153         if (err < 0)
 154                 return err;
 155
 156         err = stv06xx_write_sensor(sd, VV6410_SETUP0, 0);
 157         if (err < 0)
 158                 return err;
 159
 160         PDEBUG(D_STREAM, "Starting stream");
 161
 162         return 0;
 163 }
 164
 165 static int vv6410_stop(struct sd *sd)
 166 {
 167         struct gspca_dev *gspca_dev = (struct gspca_dev *)sd;
 168         int err;
 169
 170         /* Turn off LED */
 171         err = stv06xx_write_bridge(sd, STV_LED_CTRL, LED_OFF);
 172         if (err < 0)
 173                 return err;
 174
 175         err = stv06xx_write_sensor(sd, VV6410_SETUP0, VV6410_LOW_POWER_MODE);
 176         if (err < 0)
 177                 return err;
 178
 179         PDEBUG(D_STREAM, "Halting stream");
 180
 181         return (err < 0) ? err : 0;
 182 }
 183
 184 static int vv6410_dump(struct sd *sd)
 185 {
 186         u8 i;
 187         int err = 0;
 188
 189         pr_info("Dumping all vv6410 sensor registers\n");
 190         for (i = 0; i < 0xff && !err; i++) {
 191                 u16 data;
 192                 err = stv06xx_read_sensor(sd, i, &data);
 193                 pr_info("Register 0x%x contained 0x%x\n", i, data);
 194         }
 195         return (err < 0) ? err : 0;
 196 }
 197
 198 static int vv6410_set_hflip(struct gspca_dev *gspca_dev, __s32 val)
 199 {
 200         int err;
 201         u16 i2c_data;
 202         struct sd *sd = (struct sd *) gspca_dev;
 203
 204         err = stv06xx_read_sensor(sd, VV6410_DATAFORMAT, &i2c_data);
 205         if (err < 0)
 206                 return err;
 207
 208         if (val)
 209                 i2c_data |= VV6410_HFLIP;
 210         else
 211                 i2c_data &= ~VV6410_HFLIP;
 212
 213         PDEBUG(D_CONF, "Set horizontal flip to %d", val);
 214         err = stv06xx_write_sensor(sd, VV6410_DATAFORMAT, i2c_data);
 215
 216         return (err < 0) ? err : 0;
 217 }
 218
 219 static int vv6410_set_vflip(struct gspca_dev *gspca_dev, __s32 val)
 220 {
 221         int err;
 222         u16 i2c_data;
 223         struct sd *sd = (struct sd *) gspca_dev;
 224
 225         err = stv06xx_read_sensor(sd, VV6410_DATAFORMAT, &i2c_data);
 226         if (err < 0)
 227                 return err;
 228
 229         if (val)
 230                 i2c_data |= VV6410_VFLIP;
 231         else
 232                 i2c_data &= ~VV6410_VFLIP;
 233
 234         PDEBUG(D_CONF, "Set vertical flip to %d", val);
 235         err = stv06xx_write_sensor(sd, VV6410_DATAFORMAT, i2c_data);
 236
 237         return (err < 0) ? err : 0;
 238 }
 239
 240 static int vv6410_set_analog_gain(struct gspca_dev *gspca_dev, __s32 val)
 241 {
 242         int err;
 243         struct sd *sd = (struct sd *) gspca_dev;
 244
 245         PDEBUG(D_CONF, "Set analog gain to %d", val);
 246         err = stv06xx_write_sensor(sd, VV6410_ANALOGGAIN, 0xf0 | (val & 0xf));
 247
 248         return (err < 0) ? err : 0;
 249 }
 250
 251 static int vv6410_set_exposure(struct gspca_dev *gspca_dev, __s32 val)
 252 {
 253         int err;
 254         struct sd *sd = (struct sd *) gspca_dev;
 255         unsigned int fine, coarse;
 256
 257         val = (val * val >> 14) + val / 4;
 258
 259         fine = val % VV6410_CIF_LINELENGTH;
 260         coarse = min(512, val / VV6410_CIF_LINELENGTH);
 261
 262         PDEBUG(D_CONF, "Set coarse exposure to %d, fine expsure to %d",
 263                coarse, fine);
 264
 265         err = stv06xx_write_sensor(sd, VV6410_FINEH, fine >> 8);
 266         if (err < 0)
 267                 goto out;
 268
 269         err = stv06xx_write_sensor(sd, VV6410_FINEL, fine & 0xff);
 270         if (err < 0)
 271                 goto out;
 272
 273         err = stv06xx_write_sensor(sd, VV6410_COARSEH, coarse >> 8);
 274         if (err < 0)
 275                 goto out;
 276
 277         err = stv06xx_write_sensor(sd, VV6410_COARSEL, coarse & 0xff);
 278
 279 out:
 280         return err;
 281 }