drivers/usb/media/sn9c102_pas106b.c

   1 /***************************************************************************
   2  * Driver for PAS106B image sensor connected to the SN9C10[12] PC Camera   *
   3  * Controllers                                                             *
   4  *                                                                         *
   5  * Copyright (C) 2004 by Luca Risolia <luca.risolia@studio.unibo.it>       *
   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., 675 Mass Ave, Cambridge, MA 02139, USA.               *
  20  ***************************************************************************/
  21
  22 #include <linux/delay.h>
  23 #include "sn9c102_sensor.h"
  24
  25
  26 static struct sn9c102_sensor pas106b;
  27
  28
  29 static int pas106b_init(struct sn9c102_device* cam)
  30 {
  31         int err = 0;
  32
  33         err += sn9c102_write_reg(cam, 0x00, 0x10);
  34         err += sn9c102_write_reg(cam, 0x00, 0x11);
  35         err += sn9c102_write_reg(cam, 0x00, 0x14);
  36         err += sn9c102_write_reg(cam, 0x20, 0x17);
  37         err += sn9c102_write_reg(cam, 0x20, 0x19);
  38         err += sn9c102_write_reg(cam, 0x09, 0x18);
  39
  40         err += sn9c102_i2c_write(cam, 0x02, 0x0c);
  41         err += sn9c102_i2c_write(cam, 0x03, 0x12);
  42         err += sn9c102_i2c_write(cam, 0x04, 0x05);
  43         err += sn9c102_i2c_write(cam, 0x05, 0x22);
  44         err += sn9c102_i2c_write(cam, 0x06, 0xac);
  45         err += sn9c102_i2c_write(cam, 0x07, 0x00);
  46         err += sn9c102_i2c_write(cam, 0x08, 0x01);
  47         err += sn9c102_i2c_write(cam, 0x0a, 0x00);
  48         err += sn9c102_i2c_write(cam, 0x0b, 0x00);
  49         err += sn9c102_i2c_write(cam, 0x0d, 0x00);
  50         err += sn9c102_i2c_write(cam, 0x10, 0x06);
  51         err += sn9c102_i2c_write(cam, 0x11, 0x06);
  52         err += sn9c102_i2c_write(cam, 0x12, 0x00);
  53         err += sn9c102_i2c_write(cam, 0x14, 0x02);
  54         err += sn9c102_i2c_write(cam, 0x13, 0x01);
  55
  56         msleep(400);
  57
  58         return err;
  59 }
  60
  61
  62 static int pas106b_get_ctrl(struct sn9c102_device* cam,
  63                             struct v4l2_control* ctrl)
  64 {
  65         switch (ctrl->id) {
  66         case V4L2_CID_RED_BALANCE:
  67                 return (ctrl->value = sn9c102_i2c_read(cam, 0x0c))<0 ? -EIO:0;
  68         case V4L2_CID_BLUE_BALANCE:
  69                 return (ctrl->value = sn9c102_i2c_read(cam, 0x09))<0 ? -EIO:0;
  70         case V4L2_CID_BRIGHTNESS:
  71                 return (ctrl->value = sn9c102_i2c_read(cam, 0x0e))<0 ? -EIO:0;
  72         default:
  73                 return -EINVAL;
  74         }
  75 }
  76
  77
  78 static int pas106b_set_ctrl(struct sn9c102_device* cam,
  79                             const struct v4l2_control* ctrl)
  80 {
  81         int err = 0;
  82
  83         switch (ctrl->id) {
  84         case V4L2_CID_RED_BALANCE:
  85                 err += sn9c102_i2c_write(cam, 0x0c, ctrl->value & 0x1f);
  86                 break;
  87         case V4L2_CID_BLUE_BALANCE:
  88                 err += sn9c102_i2c_write(cam, 0x09, ctrl->value & 0x1f);
  89                 break;
  90         case V4L2_CID_BRIGHTNESS:
  91                 err += sn9c102_i2c_write(cam, 0x0e, ctrl->value & 0x1f);
  92                 break;
  93         default:
  94                 return -EINVAL;
  95         }
  96         err += sn9c102_i2c_write(cam, 0x13, 0x01);
  97
  98         return err;
  99 }
 100
 101
 102 static int pas106b_set_crop(struct sn9c102_device* cam,
 103                             const struct v4l2_rect* rect)
 104 {
 105         struct sn9c102_sensor* s = &pas106b;
 106         int err = 0;
 107         u8 h_start = (u8)(rect->left - s->cropcap.bounds.left) + 4,
 108            v_start = (u8)(rect->top - s->cropcap.bounds.top) + 3;
 109
 110         err += sn9c102_write_reg(cam, h_start, 0x12);
 111         err += sn9c102_write_reg(cam, v_start, 0x13);
 112
 113         return err;
 114 }
 115
 116
 117 static struct sn9c102_sensor pas106b = {
 118         .name = "PAS106B",
 119         .maintainer = "Luca Risolia <luca.risolia@studio.unibo.it>",
 120         .frequency = SN9C102_I2C_400KHZ | SN9C102_I2C_100KHZ,
 121         .interface = SN9C102_I2C_2WIRES,
 122         .slave_read_id = 0x40,
 123         .slave_write_id = 0x40,
 124         .init = &pas106b_init,
 125         .qctrl = {
 126                 {
 127                         .id = V4L2_CID_RED_BALANCE,
 128                         .type = V4L2_CTRL_TYPE_INTEGER,
 129                         .name = "red balance",
 130                         .minimum = 0x00,
 131                         .maximum = 0x1f,
 132                         .step = 0x01,
 133                         .default_value = 0x03,
 134                         .flags = 0,
 135                 },
 136                 {
 137                         .id = V4L2_CID_BLUE_BALANCE,
 138                         .type = V4L2_CTRL_TYPE_INTEGER,
 139                         .name = "blue balance",
 140                         .minimum = 0x00,
 141                         .maximum = 0x1f,
 142                         .step = 0x01,
 143                         .default_value = 0x02,
 144                         .flags = 0,
 145                 },
 146                 {
 147                         .id = V4L2_CID_BRIGHTNESS,
 148                         .type = V4L2_CTRL_TYPE_INTEGER,
 149                         .name = "brightness",
 150                         .minimum = 0x00,
 151                         .maximum = 0x1f,
 152                         .step = 0x01,
 153                         .default_value = 0x06,
 154                         .flags = 0,
 155                 },
 156         },
 157         .get_ctrl = &pas106b_get_ctrl,
 158         .set_ctrl = &pas106b_set_ctrl,
 159         .cropcap = {
 160                 .bounds = {
 161                         .left = 0,
 162                         .top = 0,
 163                         .width = 352,
 164                         .height = 288,
 165                 },
 166                 .defrect = {
 167                         .left = 0,
 168                         .top = 0,
 169                         .width = 352,
 170                         .height = 288,
 171                 },
 172         },
 173         .set_crop = &pas106b_set_crop,
 174         .pix_format = {
 175                 .width = 352,
 176                 .height = 288,
 177                 .pixelformat = V4L2_PIX_FMT_SBGGR8,
 178                 .priv = 8, /* we use this field as 'bits per pixel' */
 179         }
 180 };
 181
 182
 183 int sn9c102_probe_pas106b(struct sn9c102_device* cam)
 184 {
 185         int r0 = 0, r1 = 0, err = 0;
 186         unsigned int pid = 0;
 187
 188         /* Minimal initialization to enable the I2C communication
 189            NOTE: do NOT change the values! */
 190         err += sn9c102_write_reg(cam, 0x01, 0x01); /* sensor power down */
 191         err += sn9c102_write_reg(cam, 0x00, 0x01); /* sensor power on */
 192         err += sn9c102_write_reg(cam, 0x28, 0x17); /* sensor clock at 48 MHz */
 193         if (err)
 194                 return -EIO;
 195
 196         r0 = sn9c102_i2c_try_read(cam, &pas106b, 0x00);
 197         r1 = sn9c102_i2c_try_read(cam, &pas106b, 0x01);
 198
 199         if (r0 < 0 || r1 < 0)
 200                 return -EIO;
 201
 202         pid = (r0 << 11) | ((r1 & 0xf0) >> 4);
 203         if (pid != 0x007)
 204                 return -ENODEV;
 205
 206         sn9c102_attach_sensor(cam, &pas106b);
 207
 208         return 0;
 209 }