drivers/staging/go7007/wis-tw9903.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_tw9903 {
  28         int norm;
  29         int brightness;
  30         int contrast;
  31         int hue;
  32 };
  33
  34 static u8 initial_registers[] =
  35 {
  36         0x02, 0x44, /* input 1, composite */
  37         0x03, 0x92, /* correct digital format */
  38         0x04, 0x00,
  39         0x05, 0x80, /* or 0x00 for PAL */
  40         0x06, 0x40, /* second internal current reference */
  41         0x07, 0x02, /* window */
  42         0x08, 0x14, /* window */
  43         0x09, 0xf0, /* window */
  44         0x0a, 0x81, /* window */
  45         0x0b, 0xd0, /* window */
  46         0x0c, 0x8c,
  47         0x0d, 0x00, /* scaling */
  48         0x0e, 0x11, /* scaling */
  49         0x0f, 0x00, /* scaling */
  50         0x10, 0x00, /* brightness */
  51         0x11, 0x60, /* contrast */
  52         0x12, 0x01, /* sharpness */
  53         0x13, 0x7f, /* U gain */
  54         0x14, 0x5a, /* V gain */
  55         0x15, 0x00, /* hue */
  56         0x16, 0xc3, /* sharpness */
  57         0x18, 0x00,
  58         0x19, 0x58, /* vbi */
  59         0x1a, 0x80,
  60         0x1c, 0x0f, /* video norm */
  61         0x1d, 0x7f, /* video norm */
  62         0x20, 0xa0, /* clamping gain (working 0x50) */
  63         0x21, 0x22,
  64         0x22, 0xf0,
  65         0x23, 0xfe,
  66         0x24, 0x3c,
  67         0x25, 0x38,
  68         0x26, 0x44,
  69         0x27, 0x20,
  70         0x28, 0x00,
  71         0x29, 0x15,
  72         0x2a, 0xa0,
  73         0x2b, 0x44,
  74         0x2c, 0x37,
  75         0x2d, 0x00,
  76         0x2e, 0xa5, /* burst PLL control (working: a9) */
  77         0x2f, 0xe0, /* 0xea is blue test frame -- 0xe0 for normal */
  78         0x31, 0x00,
  79         0x33, 0x22,
  80         0x34, 0x11,
  81         0x35, 0x35,
  82         0x3b, 0x05,
  83         0x06, 0xc0, /* reset device */
  84         0x00, 0x00, /* Terminator (reg 0x00 is read-only) */
  85 };
  86
  87 static int write_reg(struct i2c_client *client, u8 reg, u8 value)
  88 {
  89         return i2c_smbus_write_byte_data(client, reg, value);
  90 }
  91
  92 static int write_regs(struct i2c_client *client, u8 *regs)
  93 {
  94         int i;
  95
  96         for (i = 0; regs[i] != 0x00; i += 2)
  97                 if (i2c_smbus_write_byte_data(client, regs[i], regs[i + 1]) < 0)
  98                         return -1;
  99         return 0;
 100 }
 101
 102 static int wis_tw9903_command(struct i2c_client *client,
 103                                 unsigned int cmd, void *arg)
 104 {
 105         struct wis_tw9903 *dec = i2c_get_clientdata(client);
 106
 107         switch (cmd) {
 108         case VIDIOC_S_INPUT:
 109         {
 110                 int *input = arg;
 111
 112                 i2c_smbus_write_byte_data(client, 0x02, 0x40 | (*input << 1));
 113                 break;
 114         }
 115 #if 0
 116         /* The scaler on this thing seems to be horribly broken */
 117         case DECODER_SET_RESOLUTION:
 118         {
 119                 struct video_decoder_resolution *res = arg;
 120                 /*int hscale = 256 * 720 / res->width;*/
 121                 int hscale = 256 * 720 / (res->width - (res->width > 704 ? 0 : 8));
 122                 int vscale = 256 * (dec->norm & V4L2_STD_NTSC ?  240 : 288)
 123                                 / res->height;
 124                 u8 regs[] = {
 125                         0x0d, vscale & 0xff,
 126                         0x0f, hscale & 0xff,
 127                         0x0e, ((vscale & 0xf00) >> 4) | ((hscale & 0xf00) >> 8),
 128                         0x06, 0xc0, /* reset device */
 129                         0,      0,
 130                 };
 131                 printk(KERN_DEBUG "vscale is %04x, hscale is %04x\n",
 132                                 vscale, hscale);
 133                 /*write_regs(client, regs);*/
 134                 break;
 135         }
 136 #endif
 137         case VIDIOC_S_STD:
 138         {
 139                 v4l2_std_id *input = arg;
 140                 u8 regs[] = {
 141                         0x05, *input & V4L2_STD_NTSC ? 0x80 : 0x00,
 142                         0x07, *input & V4L2_STD_NTSC ? 0x02 : 0x12,
 143                         0x08, *input & V4L2_STD_NTSC ? 0x14 : 0x18,
 144                         0x09, *input & V4L2_STD_NTSC ? 0xf0 : 0x20,
 145                         0,      0,
 146                 };
 147                 write_regs(client, regs);
 148                 dec->norm = *input;
 149                 break;
 150         }
 151         case VIDIOC_QUERYCTRL:
 152         {
 153                 struct v4l2_queryctrl *ctrl = arg;
 154
 155                 switch (ctrl->id) {
 156                 case V4L2_CID_BRIGHTNESS:
 157                         ctrl->type = V4L2_CTRL_TYPE_INTEGER;
 158                         strncpy(ctrl->name, "Brightness", sizeof(ctrl->name));
 159                         ctrl->minimum = -128;
 160                         ctrl->maximum = 127;
 161                         ctrl->step = 1;
 162                         ctrl->default_value = 0x00;
 163                         ctrl->flags = 0;
 164                         break;
 165                 case V4L2_CID_CONTRAST:
 166                         ctrl->type = V4L2_CTRL_TYPE_INTEGER;
 167                         strncpy(ctrl->name, "Contrast", sizeof(ctrl->name));
 168                         ctrl->minimum = 0;
 169                         ctrl->maximum = 255;
 170                         ctrl->step = 1;
 171                         ctrl->default_value = 0x60;
 172                         ctrl->flags = 0;
 173                         break;
 174 #if 0
 175                 /* I don't understand how the Chroma Gain registers work... */
 176                 case V4L2_CID_SATURATION:
 177                         ctrl->type = V4L2_CTRL_TYPE_INTEGER;
 178                         strncpy(ctrl->name, "Saturation", sizeof(ctrl->name));
 179                         ctrl->minimum = 0;
 180                         ctrl->maximum = 127;
 181                         ctrl->step = 1;
 182                         ctrl->default_value = 64;
 183                         ctrl->flags = 0;
 184                         break;
 185 #endif
 186                 case V4L2_CID_HUE:
 187                         ctrl->type = V4L2_CTRL_TYPE_INTEGER;
 188                         strncpy(ctrl->name, "Hue", sizeof(ctrl->name));
 189                         ctrl->minimum = -128;
 190                         ctrl->maximum = 127;
 191                         ctrl->step = 1;
 192                         ctrl->default_value = 0;
 193                         ctrl->flags = 0;
 194                         break;
 195                 }
 196                 break;
 197         }
 198         case VIDIOC_S_CTRL:
 199         {
 200                 struct v4l2_control *ctrl = arg;
 201
 202                 switch (ctrl->id) {
 203                 case V4L2_CID_BRIGHTNESS:
 204                         if (ctrl->value > 127)
 205                                 dec->brightness = 127;
 206                         else if (ctrl->value < -128)
 207                                 dec->brightness = -128;
 208                         else
 209                                 dec->brightness = ctrl->value;
 210                         write_reg(client, 0x10, dec->brightness);
 211                         break;
 212                 case V4L2_CID_CONTRAST:
 213                         if (ctrl->value > 255)
 214                                 dec->contrast = 255;
 215                         else if (ctrl->value < 0)
 216                                 dec->contrast = 0;
 217                         else
 218                                 dec->contrast = ctrl->value;
 219                         write_reg(client, 0x11, dec->contrast);
 220                         break;
 221 #if 0
 222                 case V4L2_CID_SATURATION:
 223                         if (ctrl->value > 127)
 224                                 dec->saturation = 127;
 225                         else if (ctrl->value < 0)
 226                                 dec->saturation = 0;
 227                         else
 228                                 dec->saturation = ctrl->value;
 229                         /*write_reg(client, 0x0c, dec->saturation);*/
 230                         break;
 231 #endif
 232                 case V4L2_CID_HUE:
 233                         if (ctrl->value > 127)
 234                                 dec->hue = 127;
 235                         else if (ctrl->value < -128)
 236                                 dec->hue = -128;
 237                         else
 238                                 dec->hue = ctrl->value;
 239                         write_reg(client, 0x15, dec->hue);
 240                         break;
 241                 }
 242                 break;
 243         }
 244         case VIDIOC_G_CTRL:
 245         {
 246                 struct v4l2_control *ctrl = arg;
 247
 248                 switch (ctrl->id) {
 249                 case V4L2_CID_BRIGHTNESS:
 250                         ctrl->value = dec->brightness;
 251                         break;
 252                 case V4L2_CID_CONTRAST:
 253                         ctrl->value = dec->contrast;
 254                         break;
 255 #if 0
 256                 case V4L2_CID_SATURATION:
 257                         ctrl->value = dec->saturation;
 258                         break;
 259 #endif
 260                 case V4L2_CID_HUE:
 261                         ctrl->value = dec->hue;
 262                         break;
 263                 }
 264                 break;
 265         }
 266         default:
 267                 break;
 268         }
 269         return 0;
 270 }
 271
 272 static int wis_tw9903_probe(struct i2c_client *client,
 273                             const struct i2c_device_id *id)
 274 {
 275         struct i2c_adapter *adapter = client->adapter;
 276         struct wis_tw9903 *dec;
 277
 278         if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
 279                 return -ENODEV;
 280
 281         dec = kmalloc(sizeof(struct wis_tw9903), GFP_KERNEL);
 282         if (dec == NULL)
 283                 return -ENOMEM;
 284
 285         dec->norm = V4L2_STD_NTSC;
 286         dec->brightness = 0;
 287         dec->contrast = 0x60;
 288         dec->hue = 0;
 289         i2c_set_clientdata(client, dec);
 290
 291         printk(KERN_DEBUG
 292                 "wis-tw9903: initializing TW9903 at address %d on %s\n",
 293                 client->addr, adapter->name);
 294
 295         if (write_regs(client, initial_registers) < 0) {
 296                 printk(KERN_ERR "wis-tw9903: error initializing TW9903\n");
 297                 kfree(dec);
 298                 return -ENODEV;
 299         }
 300
 301         return 0;
 302 }
 303
 304 static int wis_tw9903_remove(struct i2c_client *client)
 305 {
 306         struct wis_tw9903 *dec = i2c_get_clientdata(client);
 307
 308         kfree(dec);
 309         return 0;
 310 }
 311
 312 static const struct i2c_device_id wis_tw9903_id[] = {
 313         { "wis_tw9903", 0 },
 314         { }
 315 };
 316 MODULE_DEVICE_TABLE(i2c, wis_tw9903_id);
 317
 318 static struct i2c_driver wis_tw9903_driver = {
 319         .driver = {
 320                 .name   = "WIS TW9903 I2C driver",
 321         },
 322         .probe          = wis_tw9903_probe,
 323         .remove         = wis_tw9903_remove,
 324         .command        = wis_tw9903_command,
 325         .id_table       = wis_tw9903_id,
 326 };
 327
 328 static int __init wis_tw9903_init(void)
 329 {
 330         return i2c_add_driver(&wis_tw9903_driver);
 331 }
 332
 333 static void __exit wis_tw9903_cleanup(void)
 334 {
 335         i2c_del_driver(&wis_tw9903_driver);
 336 }
 337
 338 module_init(wis_tw9903_init);
 339 module_exit(wis_tw9903_cleanup);
 340
 341 MODULE_LICENSE("GPL v2");