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 #include <linux/slab.h>
  24
  25 #include "wis-i2c.h"
  26
  27 struct wis_tw2804 {
  28         int channel;
  29         int norm;
  30         int brightness;
  31         int contrast;
  32         int saturation;
  33         int hue;
  34 };
  35
  36 static u8 global_registers[] = {
  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         0x01, 0xc4,
  49         0x02, 0xa5,
  50         0x03, 0x20,
  51         0x04, 0xd0,
  52         0x05, 0x20,
  53         0x06, 0xd0,
  54         0x07, 0x88,
  55         0x08, 0x20,
  56         0x09, 0x07,
  57         0x0a, 0xf0,
  58         0x0b, 0x07,
  59         0x0c, 0xf0,
  60         0x0d, 0x40,
  61         0x0e, 0xd2,
  62         0x0f, 0x80,
  63         0x10, 0x80,
  64         0x11, 0x80,
  65         0x12, 0x80,
  66         0x13, 0x1f,
  67         0x14, 0x00,
  68         0x15, 0x00,
  69         0x16, 0x00,
  70         0x17, 0x00,
  71         0x18, 0xff,
  72         0x19, 0xff,
  73         0x1a, 0xff,
  74         0x1b, 0xff,
  75         0x1c, 0xff,
  76         0x1d, 0xff,
  77         0x1e, 0xff,
  78         0x1f, 0xff,
  79         0x20, 0x07,
  80         0x21, 0x07,
  81         0x22, 0x00,
  82         0x23, 0x91,
  83         0x24, 0x51,
  84         0x25, 0x03,
  85         0x26, 0x00,
  86         0x27, 0x00,
  87         0x28, 0x00,
  88         0x29, 0x00,
  89         0x2a, 0x00,
  90         0x2b, 0x00,
  91         0x2c, 0x00,
  92         0x2d, 0x00,
  93         0x2e, 0x00,
  94         0x2f, 0x00,
  95         0x30, 0x00,
  96         0x31, 0x00,
  97         0x32, 0x00,
  98         0x33, 0x00,
  99         0x34, 0x00,
 100         0x35, 0x00,
 101         0x36, 0x00,
 102         0x37, 0x00,
 103         0xff, 0xff, /* Terminator (reg 0xff does not exist) */
 104 };
 105
 106 static int write_reg(struct i2c_client *client, u8 reg, u8 value, int channel)
 107 {
 108         return i2c_smbus_write_byte_data(client, reg | (channel << 6), value);
 109 }
 110
 111 static int write_regs(struct i2c_client *client, u8 *regs, int channel)
 112 {
 113         int i;
 114
 115         for (i = 0; regs[i] != 0xff; i += 2)
 116                 if (i2c_smbus_write_byte_data(client,
 117                                 regs[i] | (channel << 6), regs[i + 1]) < 0)
 118                         return -1;
 119         return 0;
 120 }
 121
 122 static int wis_tw2804_command(struct i2c_client *client,
 123                                 unsigned int cmd, void *arg)
 124 {
 125         struct wis_tw2804 *dec = i2c_get_clientdata(client);
 126
 127         if (cmd == DECODER_SET_CHANNEL) {
 128                 int *input = arg;
 129
 130                 if (*input < 0 || *input > 3) {
 131                         printk(KERN_ERR "wis-tw2804: channel %d is not "
 132                                         "between 0 and 3!\n", *input);
 133                         return 0;
 134                 }
 135                 dec->channel = *input;
 136                 printk(KERN_DEBUG "wis-tw2804: initializing TW2804 "
 137                                 "channel %d\n", dec->channel);
 138                 if (dec->channel == 0 &&
 139                                 write_regs(client, global_registers, 0) < 0) {
 140                         printk(KERN_ERR "wis-tw2804: error initializing "
 141                                         "TW2804 global registers\n");
 142                         return 0;
 143                 }
 144                 if (write_regs(client, channel_registers, dec->channel) < 0) {
 145                         printk(KERN_ERR "wis-tw2804: error initializing "
 146                                         "TW2804 channel %d\n", dec->channel);
 147                         return 0;
 148                 }
 149                 return 0;
 150         }
 151
 152         if (dec->channel < 0) {
 153                 printk(KERN_DEBUG "wis-tw2804: ignoring command %08x until "
 154                                 "channel number is set\n", cmd);
 155                 return 0;
 156         }
 157
 158         switch (cmd) {
 159         case VIDIOC_S_STD:
 160         {
 161                 v4l2_std_id *input = arg;
 162                 u8 regs[] = {
 163                         0x01, *input & V4L2_STD_NTSC ? 0xc4 : 0x84,
 164                         0x09, *input & V4L2_STD_NTSC ? 0x07 : 0x04,
 165                         0x0a, *input & V4L2_STD_NTSC ? 0xf0 : 0x20,
 166                         0x0b, *input & V4L2_STD_NTSC ? 0x07 : 0x04,
 167                         0x0c, *input & V4L2_STD_NTSC ? 0xf0 : 0x20,
 168                         0x0d, *input & V4L2_STD_NTSC ? 0x40 : 0x4a,
 169                         0x16, *input & V4L2_STD_NTSC ? 0x00 : 0x40,
 170                         0x17, *input & V4L2_STD_NTSC ? 0x00 : 0x40,
 171                         0x20, *input & V4L2_STD_NTSC ? 0x07 : 0x0f,
 172                         0x21, *input & V4L2_STD_NTSC ? 0x07 : 0x0f,
 173                         0xff,   0xff,
 174                 };
 175                 write_regs(client, regs, dec->channel);
 176                 dec->norm = *input;
 177                 break;
 178         }
 179         case VIDIOC_QUERYCTRL:
 180         {
 181                 struct v4l2_queryctrl *ctrl = arg;
 182
 183                 switch (ctrl->id) {
 184                 case V4L2_CID_BRIGHTNESS:
 185                         ctrl->type = V4L2_CTRL_TYPE_INTEGER;
 186                         strncpy(ctrl->name, "Brightness", sizeof(ctrl->name));
 187                         ctrl->minimum = 0;
 188                         ctrl->maximum = 255;
 189                         ctrl->step = 1;
 190                         ctrl->default_value = 128;
 191                         ctrl->flags = 0;
 192                         break;
 193                 case V4L2_CID_CONTRAST:
 194                         ctrl->type = V4L2_CTRL_TYPE_INTEGER;
 195                         strncpy(ctrl->name, "Contrast", sizeof(ctrl->name));
 196                         ctrl->minimum = 0;
 197                         ctrl->maximum = 255;
 198                         ctrl->step = 1;
 199                         ctrl->default_value = 128;
 200                         ctrl->flags = 0;
 201                         break;
 202                 case V4L2_CID_SATURATION:
 203                         ctrl->type = V4L2_CTRL_TYPE_INTEGER;
 204                         strncpy(ctrl->name, "Saturation", sizeof(ctrl->name));
 205                         ctrl->minimum = 0;
 206                         ctrl->maximum = 255;
 207                         ctrl->step = 1;
 208                         ctrl->default_value = 128;
 209                         ctrl->flags = 0;
 210                         break;
 211                 case V4L2_CID_HUE:
 212                         ctrl->type = V4L2_CTRL_TYPE_INTEGER;
 213                         strncpy(ctrl->name, "Hue", sizeof(ctrl->name));
 214                         ctrl->minimum = 0;
 215                         ctrl->maximum = 255;
 216                         ctrl->step = 1;
 217                         ctrl->default_value = 128;
 218                         ctrl->flags = 0;
 219                         break;
 220                 }
 221                 break;
 222         }
 223         case VIDIOC_S_CTRL:
 224         {
 225                 struct v4l2_control *ctrl = arg;
 226
 227                 switch (ctrl->id) {
 228                 case V4L2_CID_BRIGHTNESS:
 229                         if (ctrl->value > 255)
 230                                 dec->brightness = 255;
 231                         else if (ctrl->value < 0)
 232                                 dec->brightness = 0;
 233                         else
 234                                 dec->brightness = ctrl->value;
 235                         write_reg(client, 0x12, dec->brightness, dec->channel);
 236                         break;
 237                 case V4L2_CID_CONTRAST:
 238                         if (ctrl->value > 255)
 239                                 dec->contrast = 255;
 240                         else if (ctrl->value < 0)
 241                                 dec->contrast = 0;
 242                         else
 243                                 dec->contrast = ctrl->value;
 244                         write_reg(client, 0x11, dec->contrast, dec->channel);
 245                         break;
 246                 case V4L2_CID_SATURATION:
 247                         if (ctrl->value > 255)
 248                                 dec->saturation = 255;
 249                         else if (ctrl->value < 0)
 250                                 dec->saturation = 0;
 251                         else
 252                                 dec->saturation = ctrl->value;
 253                         write_reg(client, 0x10, dec->saturation, dec->channel);
 254                         break;
 255                 case V4L2_CID_HUE:
 256                         if (ctrl->value > 255)
 257                                 dec->hue = 255;
 258                         else if (ctrl->value < 0)
 259                                 dec->hue = 0;
 260                         else
 261                                 dec->hue = ctrl->value;
 262                         write_reg(client, 0x0f, dec->hue, dec->channel);
 263                         break;
 264                 }
 265                 break;
 266         }
 267         case VIDIOC_G_CTRL:
 268         {
 269                 struct v4l2_control *ctrl = arg;
 270
 271                 switch (ctrl->id) {
 272                 case V4L2_CID_BRIGHTNESS:
 273                         ctrl->value = dec->brightness;
 274                         break;
 275                 case V4L2_CID_CONTRAST:
 276                         ctrl->value = dec->contrast;
 277                         break;
 278                 case V4L2_CID_SATURATION:
 279                         ctrl->value = dec->saturation;
 280                         break;
 281                 case V4L2_CID_HUE:
 282                         ctrl->value = dec->hue;
 283                         break;
 284                 }
 285                 break;
 286         }
 287         default:
 288                 break;
 289         }
 290         return 0;
 291 }
 292
 293 static int wis_tw2804_probe(struct i2c_client *client,
 294                             const struct i2c_device_id *id)
 295 {
 296         struct i2c_adapter *adapter = client->adapter;
 297         struct wis_tw2804 *dec;
 298
 299         if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
 300                 return -ENODEV;
 301
 302         dec = kmalloc(sizeof(struct wis_tw2804), GFP_KERNEL);
 303         if (dec == NULL)
 304                 return -ENOMEM;
 305
 306         dec->channel = -1;
 307         dec->norm = V4L2_STD_NTSC;
 308         dec->brightness = 128;
 309         dec->contrast = 128;
 310         dec->saturation = 128;
 311         dec->hue = 128;
 312         i2c_set_clientdata(client, dec);
 313
 314         printk(KERN_DEBUG "wis-tw2804: creating TW2804 at address %d on %s\n",
 315                 client->addr, adapter->name);
 316
 317         return 0;
 318 }
 319
 320 static int wis_tw2804_remove(struct i2c_client *client)
 321 {
 322         struct wis_tw2804 *dec = i2c_get_clientdata(client);
 323
 324         kfree(dec);
 325         return 0;
 326 }
 327
 328 static const struct i2c_device_id wis_tw2804_id[] = {
 329         { "wis_tw2804", 0 },
 330         { }
 331 };
 332 MODULE_DEVICE_TABLE(i2c, wis_tw2804_id);
 333
 334 static struct i2c_driver wis_tw2804_driver = {
 335         .driver = {
 336                 .name   = "WIS TW2804 I2C driver",
 337         },
 338         .probe          = wis_tw2804_probe,
 339         .remove         = wis_tw2804_remove,
 340         .command        = wis_tw2804_command,
 341         .id_table       = wis_tw2804_id,
 342 };
 343
 344 static int __init wis_tw2804_init(void)
 345 {
 346         return i2c_add_driver(&wis_tw2804_driver);
 347 }
 348
 349 static void __exit wis_tw2804_cleanup(void)
 350 {
 351         i2c_del_driver(&wis_tw2804_driver);
 352 }
 353
 354 module_init(wis_tw2804_init);
 355 module_exit(wis_tw2804_cleanup);
 356
 357 MODULE_LICENSE("GPL v2");