drivers/staging/go7007/wis-saa7113.c

   1 /*
   2  * Copyright (C) 2005-2006 Micronas USA Inc.
   3  *
   4  * This program is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License (Version 2) as
   6  * published by the Free Software Foundation.
   7  *
   8  * This program is distributed in the hope that it will be useful,
   9  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  11  * GNU General Public License for more details.
  12  *
  13  * You should have received a copy of the GNU General Public License
  14  * along with this program; if not, write to the Free Software Foundation,
  15  * Inc., 59 Temple Place - Suite 330, Boston MA 02111-1307, USA.
  16  */
  17
  18 #include <linux/module.h>
  19 #include <linux/init.h>
  20 #include <linux/i2c.h>
  21 #include <linux/videodev2.h>
  22 #include <linux/ioctl.h>
  23
  24 #include "wis-i2c.h"
  25
  26 struct wis_saa7113 {
  27         int norm;
  28         int brightness;
  29         int contrast;
  30         int saturation;
  31         int hue;
  32 };
  33
  34 static u8 initial_registers[] =
  35 {
  36         0x01, 0x08,
  37         0x02, 0xc0,
  38         0x03, 0x33,
  39         0x04, 0x00,
  40         0x05, 0x00,
  41         0x06, 0xe9,
  42         0x07, 0x0d,
  43         0x08, 0xd8,
  44         0x09, 0x40,
  45         0x0a, 0x80,
  46         0x0b, 0x47,
  47         0x0c, 0x40,
  48         0x0d, 0x00,
  49         0x0e, 0x01,
  50         0x0f, 0x2a,
  51         0x10, 0x40,
  52         0x11, 0x0c,
  53         0x12, 0xfe,
  54         0x13, 0x00,
  55         0x14, 0x00,
  56         0x15, 0x04,
  57         0x16, 0x00,
  58         0x17, 0x00,
  59         0x18, 0x00,
  60         0x19, 0x00,
  61         0x1a, 0x00,
  62         0x1b, 0x00,
  63         0x1c, 0x00,
  64         0x1d, 0x00,
  65         0x1e, 0x00,
  66         0x1f, 0xc8,
  67         0x40, 0x00,
  68         0x41, 0xff,
  69         0x42, 0xff,
  70         0x43, 0xff,
  71         0x44, 0xff,
  72         0x45, 0xff,
  73         0x46, 0xff,
  74         0x47, 0xff,
  75         0x48, 0xff,
  76         0x49, 0xff,
  77         0x4a, 0xff,
  78         0x4b, 0xff,
  79         0x4c, 0xff,
  80         0x4d, 0xff,
  81         0x4e, 0xff,
  82         0x4f, 0xff,
  83         0x50, 0xff,
  84         0x51, 0xff,
  85         0x52, 0xff,
  86         0x53, 0xff,
  87         0x54, 0xff,
  88         0x55, 0xff,
  89         0x56, 0xff,
  90         0x57, 0xff,
  91         0x58, 0x00,
  92         0x59, 0x54,
  93         0x5a, 0x07,
  94         0x5b, 0x83,
  95         0x5c, 0x00,
  96         0x5d, 0x00,
  97         0x5e, 0x00,
  98         0x5f, 0x00,
  99         0x60, 0x00,
 100         0x61, 0x00,
 101         0x00, 0x00, /* Terminator (reg 0x00 is read-only) */
 102 };
 103
 104 static int write_reg(struct i2c_client *client, u8 reg, u8 value)
 105 {
 106         return i2c_smbus_write_byte_data(client, reg, value);
 107 }
 108
 109 static int write_regs(struct i2c_client *client, u8 *regs)
 110 {
 111         int i;
 112
 113         for (i = 0; regs[i] != 0x00; i += 2)
 114                 if (i2c_smbus_write_byte_data(client, regs[i], regs[i + 1]) < 0)
 115                         return -1;
 116         return 0;
 117 }
 118
 119 static int wis_saa7113_command(struct i2c_client *client,
 120                                 unsigned int cmd, void *arg)
 121 {
 122         struct wis_saa7113 *dec = i2c_get_clientdata(client);
 123
 124         switch (cmd) {
 125         case VIDIOC_S_INPUT:
 126         {
 127                 int *input = arg;
 128
 129                 i2c_smbus_write_byte_data(client, 0x02, 0xC0 | *input);
 130                 i2c_smbus_write_byte_data(client, 0x09,
 131                                 *input < 6 ? 0x40 : 0x80);
 132                 break;
 133         }
 134         case VIDIOC_S_STD:
 135         {
 136                 v4l2_std_id *input = arg;
 137                 dec->norm = *input;
 138                 if (dec->norm & V4L2_STD_NTSC) {
 139                         write_reg(client, 0x0e, 0x01);
 140                         write_reg(client, 0x10, 0x40);
 141                 } else if (dec->norm & V4L2_STD_PAL) {
 142                         write_reg(client, 0x0e, 0x01);
 143                         write_reg(client, 0x10, 0x48);
 144                 } else if (dec->norm * V4L2_STD_SECAM) {
 145                         write_reg(client, 0x0e, 0x50);
 146                         write_reg(client, 0x10, 0x48);
 147                 }
 148                 break;
 149         }
 150         case VIDIOC_QUERYCTRL:
 151         {
 152                 struct v4l2_queryctrl *ctrl = arg;
 153
 154                 switch (ctrl->id) {
 155                 case V4L2_CID_BRIGHTNESS:
 156                         ctrl->type = V4L2_CTRL_TYPE_INTEGER;
 157                         strncpy(ctrl->name, "Brightness", sizeof(ctrl->name));
 158                         ctrl->minimum = 0;
 159                         ctrl->maximum = 255;
 160                         ctrl->step = 1;
 161                         ctrl->default_value = 128;
 162                         ctrl->flags = 0;
 163                         break;
 164                 case V4L2_CID_CONTRAST:
 165                         ctrl->type = V4L2_CTRL_TYPE_INTEGER;
 166                         strncpy(ctrl->name, "Contrast", sizeof(ctrl->name));
 167                         ctrl->minimum = 0;
 168                         ctrl->maximum = 127;
 169                         ctrl->step = 1;
 170                         ctrl->default_value = 71;
 171                         ctrl->flags = 0;
 172                         break;
 173                 case V4L2_CID_SATURATION:
 174                         ctrl->type = V4L2_CTRL_TYPE_INTEGER;
 175                         strncpy(ctrl->name, "Saturation", sizeof(ctrl->name));
 176                         ctrl->minimum = 0;
 177                         ctrl->maximum = 127;
 178                         ctrl->step = 1;
 179                         ctrl->default_value = 64;
 180                         ctrl->flags = 0;
 181                         break;
 182                 case V4L2_CID_HUE:
 183                         ctrl->type = V4L2_CTRL_TYPE_INTEGER;
 184                         strncpy(ctrl->name, "Hue", sizeof(ctrl->name));
 185                         ctrl->minimum = -128;
 186                         ctrl->maximum = 127;
 187                         ctrl->step = 1;
 188                         ctrl->default_value = 0;
 189                         ctrl->flags = 0;
 190                         break;
 191                 }
 192                 break;
 193         }
 194         case VIDIOC_S_CTRL:
 195         {
 196                 struct v4l2_control *ctrl = arg;
 197
 198                 switch (ctrl->id) {
 199                 case V4L2_CID_BRIGHTNESS:
 200                         if (ctrl->value > 255)
 201                                 dec->brightness = 255;
 202                         else if (ctrl->value < 0)
 203                                 dec->brightness = 0;
 204                         else
 205                                 dec->brightness = ctrl->value;
 206                         write_reg(client, 0x0a, dec->brightness);
 207                         break;
 208                 case V4L2_CID_CONTRAST:
 209                         if (ctrl->value > 127)
 210                                 dec->contrast = 127;
 211                         else if (ctrl->value < 0)
 212                                 dec->contrast = 0;
 213                         else
 214                                 dec->contrast = ctrl->value;
 215                         write_reg(client, 0x0b, dec->contrast);
 216                         break;
 217                 case V4L2_CID_SATURATION:
 218                         if (ctrl->value > 127)
 219                                 dec->saturation = 127;
 220                         else if (ctrl->value < 0)
 221                                 dec->saturation = 0;
 222                         else
 223                                 dec->saturation = ctrl->value;
 224                         write_reg(client, 0x0c, dec->saturation);
 225                         break;
 226                 case V4L2_CID_HUE:
 227                         if (ctrl->value > 127)
 228                                 dec->hue = 127;
 229                         else if (ctrl->value < -128)
 230                                 dec->hue = -128;
 231                         else
 232                                 dec->hue = ctrl->value;
 233                         write_reg(client, 0x0d, dec->hue);
 234                         break;
 235                 }
 236                 break;
 237         }
 238         case VIDIOC_G_CTRL:
 239         {
 240                 struct v4l2_control *ctrl = arg;
 241
 242                 switch (ctrl->id) {
 243                 case V4L2_CID_BRIGHTNESS:
 244                         ctrl->value = dec->brightness;
 245                         break;
 246                 case V4L2_CID_CONTRAST:
 247                         ctrl->value = dec->contrast;
 248                         break;
 249                 case V4L2_CID_SATURATION:
 250                         ctrl->value = dec->saturation;
 251                         break;
 252                 case V4L2_CID_HUE:
 253                         ctrl->value = dec->hue;
 254                         break;
 255                 }
 256                 break;
 257         }
 258         default:
 259                 break;
 260         }
 261         return 0;
 262 }
 263
 264 static int wis_saa7113_probe(struct i2c_client *client,
 265                              const struct i2c_device_id *id)
 266 {
 267         struct i2c_adapter *adapter = client->adapter;
 268         struct wis_saa7113 *dec;
 269
 270         if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
 271                 return -ENODEV;
 272
 273         dec = kmalloc(sizeof(struct wis_saa7113), GFP_KERNEL);
 274         if (dec == NULL)
 275                 return -ENOMEM;
 276
 277         dec->norm = V4L2_STD_NTSC;
 278         dec->brightness = 128;
 279         dec->contrast = 71;
 280         dec->saturation = 64;
 281         dec->hue = 0;
 282         i2c_set_clientdata(client, dec);
 283
 284         printk(KERN_DEBUG
 285                 "wis-saa7113: initializing SAA7113 at address %d on %s\n",
 286                 client->addr, adapter->name);
 287
 288         if (write_regs(client, initial_registers) < 0) {
 289                 printk(KERN_ERR
 290                         "wis-saa7113: error initializing SAA7113\n");
 291                 kfree(dec);
 292                 return -ENODEV;
 293         }
 294
 295         return 0;
 296 }
 297
 298 static int wis_saa7113_remove(struct i2c_client *client)
 299 {
 300         struct wis_saa7113 *dec = i2c_get_clientdata(client);
 301
 302         i2c_set_clientdata(client, NULL);
 303         kfree(dec);
 304         return 0;
 305 }
 306
 307 static struct i2c_device_id wis_saa7113_id[] = {
 308         { "wis_saa7113", 0 },
 309         { }
 310 };
 311
 312 static struct i2c_driver wis_saa7113_driver = {
 313         .driver = {
 314                 .name   = "WIS SAA7113 I2C driver",
 315         },
 316         .probe          = wis_saa7113_probe,
 317         .remove         = wis_saa7113_remove,
 318         .command        = wis_saa7113_command,
 319         .id_table       = wis_saa7113_id,
 320 };
 321
 322 static int __init wis_saa7113_init(void)
 323 {
 324         return i2c_add_driver(&wis_saa7113_driver);
 325 }
 326
 327 static void __exit wis_saa7113_cleanup(void)
 328 {
 329         i2c_del_driver(&wis_saa7113_driver);
 330 }
 331
 332 module_init(wis_saa7113_init);
 333 module_exit(wis_saa7113_cleanup);
 334
 335 MODULE_LICENSE("GPL v2");