SAFE public projects git trees. - safe/jmp/linux-2.6/blob - drivers/staging/go7007/wis-tw2804.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_tw2804 {
  27         int channel;
  28         int norm;
  29         int brightness;
  30         int contrast;
  31         int saturation;
  32         int hue;
  33 };
  34
  35 static u8 global_registers[] =
  36 {
  37         0x39, 0x00,
  38         0x3a, 0xff,
  39         0x3b, 0x84,
  40         0x3c, 0x80,
  41         0x3d, 0x80,
  42         0x3e, 0x82,
  43         0x3f, 0x82,
  44         0xff, 0xff, /* Terminator (reg 0xff does not exist) */
  45 };
  46
  47 static u8 channel_registers[] =
  48 {
  49         0x01, 0xc4,
  50         0x02, 0xa5,
  51         0x03, 0x20,
  52         0x04, 0xd0,
  53         0x05, 0x20,
  54         0x06, 0xd0,
  55         0x07, 0x88,
  56         0x08, 0x20,
  57         0x09, 0x07,
  58         0x0a, 0xf0,
  59         0x0b, 0x07,
  60         0x0c, 0xf0,
  61         0x0d, 0x40,
  62         0x0e, 0xd2,
  63         0x0f, 0x80,
  64         0x10, 0x80,
  65         0x11, 0x80,
  66         0x12, 0x80,
  67         0x13, 0x1f,
  68         0x14, 0x00,
  69         0x15, 0x00,
  70         0x16, 0x00,
  71         0x17, 0x00,
  72         0x18, 0xff,
  73         0x19, 0xff,
  74         0x1a, 0xff,
  75         0x1b, 0xff,
  76         0x1c, 0xff,
  77         0x1d, 0xff,
  78         0x1e, 0xff,
  79         0x1f, 0xff,
  80         0x20, 0x07,
  81         0x21, 0x07,
  82         0x22, 0x00,
  83         0x23, 0x91,
  84         0x24, 0x51,
  85         0x25, 0x03,
  86         0x26, 0x00,
  87         0x27, 0x00,
  88         0x28, 0x00,
  89         0x29, 0x00,
  90         0x2a, 0x00,
  91         0x2b, 0x00,
  92         0x2c, 0x00,
  93         0x2d, 0x00,
  94         0x2e, 0x00,
  95         0x2f, 0x00,
  96         0x30, 0x00,
  97         0x31, 0x00,
  98         0x32, 0x00,
  99         0x33, 0x00,
 100         0x34, 0x00,
 101         0x35, 0x00,
 102         0x36, 0x00,
 103         0x37, 0x00,
 104         0xff, 0xff, /* Terminator (reg 0xff does not exist) */
 105 };
 106
 107 static int write_reg(struct i2c_client *client, u8 reg, u8 value, int channel)
 108 {
 109         return i2c_smbus_write_byte_data(client, reg | (channel << 6), value);
 110 }
 111
 112 static int write_regs(struct i2c_client *client, u8 *regs, int channel)
 113 {
 114         int i;
 115
 116         for (i = 0; regs[i] != 0xff; i += 2)
 117                 if (i2c_smbus_write_byte_data(client,
 118                                 regs[i] | (channel << 6), regs[i + 1]) < 0)
 119                         return -1;
 120         return 0;
 121 }
 122
 123 static int wis_tw2804_command(struct i2c_client *client,
 124                                 unsigned int cmd, void *arg)
 125 {
 126         struct wis_tw2804 *dec = i2c_get_clientdata(client);
 127
 128         if (cmd == DECODER_SET_CHANNEL) {
 129                 int *input = arg;
 130
 131                 if (*input < 0 || *input > 3) {
 132                         printk(KERN_ERR "wis-tw2804: channel %d is not "
 133                                         "between 0 and 3!\n", *input);
 134                         return 0;
 135                 }
 136                 dec->channel = *input;
 137                 printk(KERN_DEBUG "wis-tw2804: initializing TW2804 "
 138                                 "channel %d\n", dec->channel);
 139                 if (dec->channel == 0 &&
 140                                 write_regs(client, global_registers, 0) < 0) {
 141                         printk(KERN_ERR "wis-tw2804: error initializing "
 142                                         "TW2804 global registers\n");
 143                         return 0;
 144                 }
 145                 if (write_regs(client, channel_registers, dec->channel) < 0) {
 146                         printk(KERN_ERR "wis-tw2804: error initializing "
 147                                         "TW2804 channel %d\n", dec->channel);
 148                         return 0;
 149                 }
 150                 return 0;
 151         }
 152
 153         if (dec->channel < 0) {
 154                 printk(KERN_DEBUG "wis-tw2804: ignoring command %08x until "
 155                                 "channel number is set\n", cmd);
 156                 return 0;
 157         }
 158
 159         switch (cmd) {
 160         case VIDIOC_S_STD:
 161         {
 162                 v4l2_std_id *input = arg;
 163                 u8 regs[] = {
 164                         0x01, *input & V4L2_STD_NTSC ? 0xc4 : 0x84,
 165                         0x09, *input & V4L2_STD_NTSC ? 0x07 : 0x04,
 166                         0x0a, *input & V4L2_STD_NTSC ? 0xf0 : 0x20,
 167                         0x0b, *input & V4L2_STD_NTSC ? 0x07 : 0x04,
 168                         0x0c, *input & V4L2_STD_NTSC ? 0xf0 : 0x20,
 169                         0x0d, *input & V4L2_STD_NTSC ? 0x40 : 0x4a,
 170                         0x16, *input & V4L2_STD_NTSC ? 0x00 : 0x40,
 171                         0x17, *input & V4L2_STD_NTSC ? 0x00 : 0x40,
 172                         0x20, *input & V4L2_STD_NTSC ? 0x07 : 0x0f,
 173                         0x21, *input & V4L2_STD_NTSC ? 0x07 : 0x0f,
 174                         0xff,   0xff,
 175                 };
 176                 write_regs(client, regs, dec->channel);
 177                 dec->norm = *input;
 178                 break;
 179         }
 180         case VIDIOC_QUERYCTRL:
 181         {
 182                 struct v4l2_queryctrl *ctrl = arg;
 183
 184                 switch (ctrl->id) {
 185                 case V4L2_CID_BRIGHTNESS:
 186                         ctrl->type = V4L2_CTRL_TYPE_INTEGER;
 187                         strncpy(ctrl->name, "Brightness", sizeof(ctrl->name));
 188                         ctrl->minimum = 0;
 189                         ctrl->maximum = 255;
 190                         ctrl->step = 1;
 191                         ctrl->default_value = 128;
 192                         ctrl->flags = 0;
 193                         break;
 194                 case V4L2_CID_CONTRAST:
 195                         ctrl->type = V4L2_CTRL_TYPE_INTEGER;
 196                         strncpy(ctrl->name, "Contrast", sizeof(ctrl->name));
 197                         ctrl->minimum = 0;
 198                         ctrl->maximum = 255;
 199                         ctrl->step = 1;
 200                         ctrl->default_value = 128;
 201                         ctrl->flags = 0;
 202                         break;
 203                 case V4L2_CID_SATURATION:
 204                         ctrl->type = V4L2_CTRL_TYPE_INTEGER;
 205                         strncpy(ctrl->name, "Saturation", sizeof(ctrl->name));
 206                         ctrl->minimum = 0;
 207                         ctrl->maximum = 255;
 208                         ctrl->step = 1;
 209                         ctrl->default_value = 128;
 210                         ctrl->flags = 0;
 211                         break;
 212                 case V4L2_CID_HUE:
 213                         ctrl->type = V4L2_CTRL_TYPE_INTEGER;
 214                         strncpy(ctrl->name, "Hue", sizeof(ctrl->name));
 215                         ctrl->minimum = 0;
 216                         ctrl->maximum = 255;
 217                         ctrl->step = 1;
 218                         ctrl->default_value = 128;
 219                         ctrl->flags = 0;
 220                         break;
 221                 }
 222                 break;
 223         }
 224         case VIDIOC_S_CTRL:
 225         {
 226                 struct v4l2_control *ctrl = arg;
 227
 228                 switch (ctrl->id) {
 229                 case V4L2_CID_BRIGHTNESS:
 230                         if (ctrl->value > 255)
 231                                 dec->brightness = 255;
 232                         else if (ctrl->value < 0)
 233                                 dec->brightness = 0;
 234                         else
 235                                 dec->brightness = ctrl->value;
 236                         write_reg(client, 0x12, dec->brightness, dec->channel);
 237                         break;
 238                 case V4L2_CID_CONTRAST:
 239                         if (ctrl->value > 255)
 240                                 dec->contrast = 255;
 241                         else if (ctrl->value < 0)
 242                                 dec->contrast = 0;
 243                         else
 244                                 dec->contrast = ctrl->value;
 245                         write_reg(client, 0x11, dec->contrast, dec->channel);
 246                         break;
 247                 case V4L2_CID_SATURATION:
 248                         if (ctrl->value > 255)
 249                                 dec->saturation = 255;
 250                         else if (ctrl->value < 0)
 251                                 dec->saturation = 0;
 252                         else
 253                                 dec->saturation = ctrl->value;
 254                         write_reg(client, 0x10, dec->saturation, dec->channel);
 255                         break;
 256                 case V4L2_CID_HUE:
 257                         if (ctrl->value > 255)
 258                                 dec->hue = 255;
 259                         else if (ctrl->value < 0)
 260                                 dec->hue = 0;
 261                         else
 262                                 dec->hue = ctrl->value;
 263                         write_reg(client, 0x0f, dec->hue, dec->channel);
 264                         break;
 265                 }
 266                 break;
 267         }
 268         case VIDIOC_G_CTRL:
 269         {
 270                 struct v4l2_control *ctrl = arg;
 271
 272                 switch (ctrl->id) {
 273                 case V4L2_CID_BRIGHTNESS:
 274                         ctrl->value = dec->brightness;
 275                         break;
 276                 case V4L2_CID_CONTRAST:
 277                         ctrl->value = dec->contrast;
 278                         break;
 279                 case V4L2_CID_SATURATION:
 280                         ctrl->value = dec->saturation;
 281                         break;
 282                 case V4L2_CID_HUE:
 283                         ctrl->value = dec->hue;
 284                         break;
 285                 }
 286                 break;
 287         }
 288         default:
 289                 break;
 290         }
 291         return 0;
 292 }
 293
 294 static int wis_tw2804_probe(struct i2c_client *client,
 295                             const struct i2c_device_id *id)
 296 {
 297         struct i2c_adapter *adapter = client->adapter;
 298         struct wis_tw2804 *dec;
 299
 300         if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
 301                 return -ENODEV;
 302
 303         dec = kmalloc(sizeof(struct wis_tw2804), GFP_KERNEL);
 304         if (dec == NULL)
 305                 return -ENOMEM;
 306
 307         dec->channel = -1;
 308         dec->norm = V4L2_STD_NTSC;
 309         dec->brightness = 128;
 310         dec->contrast = 128;
 311         dec->saturation = 128;
 312         dec->hue = 128;
 313         i2c_set_clientdata(client, dec);
 314
 315         printk(KERN_DEBUG "wis-tw2804: creating TW2804 at address %d on %s\n",
 316                 client->addr, adapter->name);
 317
 318         return 0;
 319 }
 320
 321 static int wis_tw2804_remove(struct i2c_client *client)
 322 {
 323         struct wis_tw2804 *dec = i2c_get_clientdata(client);
 324
 325         i2c_set_clientdata(client, NULL);
 326         kfree(dec);
 327         return 0;
 328 }
 329
 330 static struct i2c_device_id wis_tw2804_id[] = {
 331         { "wis_tw2804", 0 },
 332         { }
 333 };
 334
 335 static struct i2c_driver wis_tw2804_driver = {
 336         .driver = {
 337                 .name   = "WIS TW2804 I2C driver",
 338         },
 339         .probe          = wis_tw2804_probe,
 340         .remove         = wis_tw2804_remove,
 341         .command        = wis_tw2804_command,
 342         .id_table       = wis_tw2804_id,
 343 };
 344
 345 static int __init wis_tw2804_init(void)
 346 {
 347         return i2c_add_driver(&wis_tw2804_driver);
 348 }
 349
 350 static void __exit wis_tw2804_cleanup(void)
 351 {
 352         i2c_del_driver(&wis_tw2804_driver);
 353 }
 354
 355 module_init(wis_tw2804_init);
 356 module_exit(wis_tw2804_cleanup);
 357
 358 MODULE_LICENSE("GPL v2");