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   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_tw9903 {
  27         int norm;
  28         int brightness;
  29         int contrast;
  30         int hue;
  31 };
  32
  33 static u8 initial_registers[] =
  34 {
  35         0x02, 0x44, /* input 1, composite */
  36         0x03, 0x92, /* correct digital format */
  37         0x04, 0x00,
  38         0x05, 0x80, /* or 0x00 for PAL */
  39         0x06, 0x40, /* second internal current reference */
  40         0x07, 0x02, /* window */
  41         0x08, 0x14, /* window */
  42         0x09, 0xf0, /* window */
  43         0x0a, 0x81, /* window */
  44         0x0b, 0xd0, /* window */
  45         0x0c, 0x8c,
  46         0x0d, 0x00, /* scaling */
  47         0x0e, 0x11, /* scaling */
  48         0x0f, 0x00, /* scaling */
  49         0x10, 0x00, /* brightness */
  50         0x11, 0x60, /* contrast */
  51         0x12, 0x01, /* sharpness */
  52         0x13, 0x7f, /* U gain */
  53         0x14, 0x5a, /* V gain */
  54         0x15, 0x00, /* hue */
  55         0x16, 0xc3, /* sharpness */
  56         0x18, 0x00,
  57         0x19, 0x58, /* vbi */
  58         0x1a, 0x80,
  59         0x1c, 0x0f, /* video norm */
  60         0x1d, 0x7f, /* video norm */
  61         0x20, 0xa0, /* clamping gain (working 0x50) */
  62         0x21, 0x22,
  63         0x22, 0xf0,
  64         0x23, 0xfe,
  65         0x24, 0x3c,
  66         0x25, 0x38,
  67         0x26, 0x44,
  68         0x27, 0x20,
  69         0x28, 0x00,
  70         0x29, 0x15,
  71         0x2a, 0xa0,
  72         0x2b, 0x44,
  73         0x2c, 0x37,
  74         0x2d, 0x00,
  75         0x2e, 0xa5, /* burst PLL control (working: a9) */
  76         0x2f, 0xe0, /* 0xea is blue test frame -- 0xe0 for normal */
  77         0x31, 0x00,
  78         0x33, 0x22,
  79         0x34, 0x11,
  80         0x35, 0x35,
  81         0x3b, 0x05,
  82         0x06, 0xc0, /* reset device */
  83         0x00, 0x00, /* Terminator (reg 0x00 is read-only) */
  84 };
  85
  86 static int write_reg(struct i2c_client *client, u8 reg, u8 value)
  87 {
  88         return i2c_smbus_write_byte_data(client, reg, value);
  89 }
  90
  91 static int write_regs(struct i2c_client *client, u8 *regs)
  92 {
  93         int i;
  94
  95         for (i = 0; regs[i] != 0x00; i += 2)
  96                 if (i2c_smbus_write_byte_data(client, regs[i], regs[i + 1]) < 0)
  97                         return -1;
  98         return 0;
  99 }
 100
 101 static int wis_tw9903_command(struct i2c_client *client,
 102                                 unsigned int cmd, void *arg)
 103 {
 104         struct wis_tw9903 *dec = i2c_get_clientdata(client);
 105
 106         switch (cmd) {
 107         case VIDIOC_S_INPUT:
 108         {
 109                 int *input = arg;
 110
 111                 i2c_smbus_write_byte_data(client, 0x02, 0x40 | (*input << 1));
 112                 break;
 113         }
 114 #if 0   /* The scaler on this thing seems to be horribly broken */
 115         case DECODER_SET_RESOLUTION:
 116         {
 117                 struct video_decoder_resolution *res = arg;
 118                 /*int hscale = 256 * 720 / res->width;*/
 119                 int hscale = 256 * 720 / (res->width - (res->width > 704 ? 0 : 8));
 120                 int vscale = 256 * (dec->norm & V4L2_STD_NTSC ?  240 : 288)
 121                                 / res->height;
 122                 u8 regs[] = {
 123                         0x0d, vscale & 0xff,
 124                         0x0f, hscale & 0xff,
 125                         0x0e, ((vscale & 0xf00) >> 4) | ((hscale & 0xf00) >> 8),
 126                         0x06, 0xc0, /* reset device */
 127                         0,      0,
 128                 };
 129                 printk(KERN_DEBUG "vscale is %04x, hscale is %04x\n",
 130                                 vscale, hscale);
 131                 /*write_regs(client, regs);*/
 132                 break;
 133         }
 134 #endif
 135         case VIDIOC_S_STD:
 136         {
 137                 v4l2_std_id *input = arg;
 138                 u8 regs[] = {
 139                         0x05, *input & V4L2_STD_NTSC ? 0x80 : 0x00,
 140                         0x07, *input & V4L2_STD_NTSC ? 0x02 : 0x12,
 141                         0x08, *input & V4L2_STD_NTSC ? 0x14 : 0x18,
 142                         0x09, *input & V4L2_STD_NTSC ? 0xf0 : 0x20,
 143                         0,      0,
 144                 };
 145                 write_regs(client, regs);
 146                 dec->norm = *input;
 147                 break;
 148         }
 149         case VIDIOC_QUERYCTRL:
 150         {
 151                 struct v4l2_queryctrl *ctrl = arg;
 152
 153                 switch (ctrl->id) {
 154                 case V4L2_CID_BRIGHTNESS:
 155                         ctrl->type = V4L2_CTRL_TYPE_INTEGER;
 156                         strncpy(ctrl->name, "Brightness", sizeof(ctrl->name));
 157                         ctrl->minimum = -128;
 158                         ctrl->maximum = 127;
 159                         ctrl->step = 1;
 160                         ctrl->default_value = 0x00;
 161                         ctrl->flags = 0;
 162                         break;
 163                 case V4L2_CID_CONTRAST:
 164                         ctrl->type = V4L2_CTRL_TYPE_INTEGER;
 165                         strncpy(ctrl->name, "Contrast", sizeof(ctrl->name));
 166                         ctrl->minimum = 0;
 167                         ctrl->maximum = 255;
 168                         ctrl->step = 1;
 169                         ctrl->default_value = 0x60;
 170                         ctrl->flags = 0;
 171                         break;
 172 #if 0
 173                 /* I don't understand how the Chroma Gain registers work... */
 174                 case V4L2_CID_SATURATION:
 175                         ctrl->type = V4L2_CTRL_TYPE_INTEGER;
 176                         strncpy(ctrl->name, "Saturation", sizeof(ctrl->name));
 177                         ctrl->minimum = 0;
 178                         ctrl->maximum = 127;
 179                         ctrl->step = 1;
 180                         ctrl->default_value = 64;
 181                         ctrl->flags = 0;
 182                         break;
 183 #endif
 184                 case V4L2_CID_HUE:
 185                         ctrl->type = V4L2_CTRL_TYPE_INTEGER;
 186                         strncpy(ctrl->name, "Hue", sizeof(ctrl->name));
 187                         ctrl->minimum = -128;
 188                         ctrl->maximum = 127;
 189                         ctrl->step = 1;
 190                         ctrl->default_value = 0;
 191                         ctrl->flags = 0;
 192                         break;
 193                 }
 194                 break;
 195         }
 196         case VIDIOC_S_CTRL:
 197         {
 198                 struct v4l2_control *ctrl = arg;
 199
 200                 switch (ctrl->id) {
 201                 case V4L2_CID_BRIGHTNESS:
 202                         if (ctrl->value > 127)
 203                                 dec->brightness = 127;
 204                         else if (ctrl->value < -128)
 205                                 dec->brightness = -128;
 206                         else
 207                                 dec->brightness = ctrl->value;
 208                         write_reg(client, 0x10, dec->brightness);
 209                         break;
 210                 case V4L2_CID_CONTRAST:
 211                         if (ctrl->value > 255)
 212                                 dec->contrast = 255;
 213                         else if (ctrl->value < 0)
 214                                 dec->contrast = 0;
 215                         else
 216                                 dec->contrast = ctrl->value;
 217                         write_reg(client, 0x11, dec->contrast);
 218                         break;
 219 #if 0
 220                 case V4L2_CID_SATURATION:
 221                         if (ctrl->value > 127)
 222                                 dec->saturation = 127;
 223                         else if (ctrl->value < 0)
 224                                 dec->saturation = 0;
 225                         else
 226                                 dec->saturation = ctrl->value;
 227                         /*write_reg(client, 0x0c, dec->saturation);*/
 228                         break;
 229 #endif
 230                 case V4L2_CID_HUE:
 231                         if (ctrl->value > 127)
 232                                 dec->hue = 127;
 233                         else if (ctrl->value < -128)
 234                                 dec->hue = -128;
 235                         else
 236                                 dec->hue = ctrl->value;
 237                         write_reg(client, 0x15, dec->hue);
 238                         break;
 239                 }
 240                 break;
 241         }
 242         case VIDIOC_G_CTRL:
 243         {
 244                 struct v4l2_control *ctrl = arg;
 245
 246                 switch (ctrl->id) {
 247                 case V4L2_CID_BRIGHTNESS:
 248                         ctrl->value = dec->brightness;
 249                         break;
 250                 case V4L2_CID_CONTRAST:
 251                         ctrl->value = dec->contrast;
 252                         break;
 253 #if 0
 254                 case V4L2_CID_SATURATION:
 255                         ctrl->value = dec->saturation;
 256                         break;
 257 #endif
 258                 case V4L2_CID_HUE:
 259                         ctrl->value = dec->hue;
 260                         break;
 261                 }
 262                 break;
 263         }
 264         default:
 265                 break;
 266         }
 267         return 0;
 268 }
 269
 270 static int wis_tw9903_probe(struct i2c_client *client,
 271                             const struct i2c_device_id *id)
 272 {
 273         struct i2c_adapter *adapter = client->adapter;
 274         struct wis_tw9903 *dec;
 275
 276         if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
 277                 return -ENODEV;
 278
 279         dec = kmalloc(sizeof(struct wis_tw9903), GFP_KERNEL);
 280         if (dec == NULL)
 281                 return -ENOMEM;
 282
 283         dec->norm = V4L2_STD_NTSC;
 284         dec->brightness = 0;
 285         dec->contrast = 0x60;
 286         dec->hue = 0;
 287         i2c_set_clientdata(client, dec);
 288
 289         printk(KERN_DEBUG
 290                 "wis-tw9903: initializing TW9903 at address %d on %s\n",
 291                 client->addr, adapter->name);
 292
 293         if (write_regs(client, initial_registers) < 0) {
 294                 printk(KERN_ERR "wis-tw9903: error initializing TW9903\n");
 295                 kfree(dec);
 296                 return -ENODEV;
 297         }
 298
 299         return 0;
 300 }
 301
 302 static int wis_tw9903_remove(struct i2c_client *client)
 303 {
 304         struct wis_tw9903 *dec = i2c_get_clientdata(client);
 305
 306         i2c_set_clientdata(client, NULL);
 307         kfree(dec);
 308         return 0;
 309 }
 310
 311 static struct i2c_device_id wis_tw9903_id[] = {
 312         { "wis_tw9903", 0 },
 313         { }
 314 };
 315
 316 static struct i2c_driver wis_tw9903_driver = {
 317         .driver = {
 318                 .name   = "WIS TW9903 I2C driver",
 319         },
 320         .probe          = wis_tw9903_probe,
 321         .remove         = wis_tw9903_remove,
 322         .command        = wis_tw9903_command,
 323         .id_table       = wis_tw9903_id,
 324 };
 325
 326 static int __init wis_tw9903_init(void)
 327 {
 328         return i2c_add_driver(&wis_tw9903_driver);
 329 }
 330
 331 static void __exit wis_tw9903_cleanup(void)
 332 {
 333         i2c_del_driver(&wis_tw9903_driver);
 334 }
 335
 336 module_init(wis_tw9903_init);
 337 module_exit(wis_tw9903_cleanup);
 338
 339 MODULE_LICENSE("GPL v2");