drivers/media/video/imx074.c

   1 /*
   2  * Driver for IMX074 CMOS Image Sensor from Sony
   3  *
   4  * Copyright (C) 2010, Guennadi Liakhovetski <g.liakhovetski@gmx.de>
   5  *
   6  * Partially inspired by the IMX074 driver from the Android / MSM tree
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License version 2 as
  10  * published by the Free Software Foundation.
  11  */
  12
  13 #include <linux/delay.h>
  14 #include <linux/i2c.h>
  15 #include <linux/v4l2-mediabus.h>
  16 #include <linux/slab.h>
  17 #include <linux/videodev2.h>
  18 #include <linux/module.h>
  19
  20 #include <media/soc_camera.h>
  21 #include <media/v4l2-subdev.h>
  22 #include <media/v4l2-chip-ident.h>
  23
  24 /* IMX074 registers */
  25
  26 #define MODE_SELECT                     0x0100
  27 #define IMAGE_ORIENTATION               0x0101
  28 #define GROUPED_PARAMETER_HOLD          0x0104
  29
  30 /* Integration Time */
  31 #define COARSE_INTEGRATION_TIME_HI      0x0202
  32 #define COARSE_INTEGRATION_TIME_LO      0x0203
  33 /* Gain */
  34 #define ANALOGUE_GAIN_CODE_GLOBAL_HI    0x0204
  35 #define ANALOGUE_GAIN_CODE_GLOBAL_LO    0x0205
  36
  37 /* PLL registers */
  38 #define PRE_PLL_CLK_DIV                 0x0305
  39 #define PLL_MULTIPLIER                  0x0307
  40 #define PLSTATIM                        0x302b
  41 #define VNDMY_ABLMGSHLMT                0x300a
  42 #define Y_OPBADDR_START_DI              0x3014
  43 /* mode setting */
  44 #define FRAME_LENGTH_LINES_HI           0x0340
  45 #define FRAME_LENGTH_LINES_LO           0x0341
  46 #define LINE_LENGTH_PCK_HI              0x0342
  47 #define LINE_LENGTH_PCK_LO              0x0343
  48 #define YADDR_START                     0x0347
  49 #define YADDR_END                       0x034b
  50 #define X_OUTPUT_SIZE_MSB               0x034c
  51 #define X_OUTPUT_SIZE_LSB               0x034d
  52 #define Y_OUTPUT_SIZE_MSB               0x034e
  53 #define Y_OUTPUT_SIZE_LSB               0x034f
  54 #define X_EVEN_INC                      0x0381
  55 #define X_ODD_INC                       0x0383
  56 #define Y_EVEN_INC                      0x0385
  57 #define Y_ODD_INC                       0x0387
  58
  59 #define HMODEADD                        0x3001
  60 #define VMODEADD                        0x3016
  61 #define VAPPLINE_START                  0x3069
  62 #define VAPPLINE_END                    0x306b
  63 #define SHUTTER                         0x3086
  64 #define HADDAVE                         0x30e8
  65 #define LANESEL                         0x3301
  66
  67 /* IMX074 supported geometry */
  68 #define IMX074_WIDTH                    1052
  69 #define IMX074_HEIGHT                   780
  70
  71 /* IMX074 has only one fixed colorspace per pixelcode */
  72 struct imx074_datafmt {
  73         enum v4l2_mbus_pixelcode        code;
  74         enum v4l2_colorspace            colorspace;
  75 };
  76
  77 struct imx074 {
  78         struct v4l2_subdev              subdev;
  79         const struct imx074_datafmt     *fmt;
  80 };
  81
  82 static const struct imx074_datafmt imx074_colour_fmts[] = {
  83         {V4L2_MBUS_FMT_SBGGR8_1X8, V4L2_COLORSPACE_SRGB},
  84 };
  85
  86 static struct imx074 *to_imx074(const struct i2c_client *client)
  87 {
  88         return container_of(i2c_get_clientdata(client), struct imx074, subdev);
  89 }
  90
  91 /* Find a data format by a pixel code in an array */
  92 static const struct imx074_datafmt *imx074_find_datafmt(enum v4l2_mbus_pixelcode code)
  93 {
  94         int i;
  95
  96         for (i = 0; i < ARRAY_SIZE(imx074_colour_fmts); i++)
  97                 if (imx074_colour_fmts[i].code == code)
  98                         return imx074_colour_fmts + i;
  99
 100         return NULL;
 101 }
 102
 103 static int reg_write(struct i2c_client *client, const u16 addr, const u8 data)
 104 {
 105         struct i2c_adapter *adap = client->adapter;
 106         struct i2c_msg msg;
 107         unsigned char tx[3];
 108         int ret;
 109
 110         msg.addr = client->addr;
 111         msg.buf = tx;
 112         msg.len = 3;
 113         msg.flags = 0;
 114
 115         tx[0] = addr >> 8;
 116         tx[1] = addr & 0xff;
 117         tx[2] = data;
 118
 119         ret = i2c_transfer(adap, &msg, 1);
 120
 121         mdelay(2);
 122
 123         return ret == 1 ? 0 : -EIO;
 124 }
 125
 126 static int reg_read(struct i2c_client *client, const u16 addr)
 127 {
 128         u8 buf[2] = {addr >> 8, addr & 0xff};
 129         int ret;
 130         struct i2c_msg msgs[] = {
 131                 {
 132                         .addr  = client->addr,
 133                         .flags = 0,
 134                         .len   = 2,
 135                         .buf   = buf,
 136                 }, {
 137                         .addr  = client->addr,
 138                         .flags = I2C_M_RD,
 139                         .len   = 2,
 140                         .buf   = buf,
 141                 },
 142         };
 143
 144         ret = i2c_transfer(client->adapter, msgs, ARRAY_SIZE(msgs));
 145         if (ret < 0) {
 146                 dev_warn(&client->dev, "Reading register %x from %x failed\n",
 147                          addr, client->addr);
 148                 return ret;
 149         }
 150
 151         return buf[0] & 0xff; /* no sign-extension */
 152 }
 153
 154 static int imx074_try_fmt(struct v4l2_subdev *sd,
 155                           struct v4l2_mbus_framefmt *mf)
 156 {
 157         const struct imx074_datafmt *fmt = imx074_find_datafmt(mf->code);
 158
 159         dev_dbg(sd->v4l2_dev->dev, "%s(%u)\n", __func__, mf->code);
 160
 161         if (!fmt) {
 162                 mf->code        = imx074_colour_fmts[0].code;
 163                 mf->colorspace  = imx074_colour_fmts[0].colorspace;
 164         }
 165
 166         mf->width       = IMX074_WIDTH;
 167         mf->height      = IMX074_HEIGHT;
 168         mf->field       = V4L2_FIELD_NONE;
 169
 170         return 0;
 171 }
 172
 173 static int imx074_s_fmt(struct v4l2_subdev *sd,
 174                         struct v4l2_mbus_framefmt *mf)
 175 {
 176         struct i2c_client *client = v4l2_get_subdevdata(sd);
 177         struct imx074 *priv = to_imx074(client);
 178
 179         dev_dbg(sd->v4l2_dev->dev, "%s(%u)\n", __func__, mf->code);
 180
 181         /* MIPI CSI could have changed the format, double-check */
 182         if (!imx074_find_datafmt(mf->code))
 183                 return -EINVAL;
 184
 185         imx074_try_fmt(sd, mf);
 186
 187         priv->fmt = imx074_find_datafmt(mf->code);
 188
 189         return 0;
 190 }
 191
 192 static int imx074_g_fmt(struct v4l2_subdev *sd,
 193                         struct v4l2_mbus_framefmt *mf)
 194 {
 195         struct i2c_client *client = v4l2_get_subdevdata(sd);
 196         struct imx074 *priv = to_imx074(client);
 197
 198         const struct imx074_datafmt *fmt = priv->fmt;
 199
 200         mf->code        = fmt->code;
 201         mf->colorspace  = fmt->colorspace;
 202         mf->width       = IMX074_WIDTH;
 203         mf->height      = IMX074_HEIGHT;
 204         mf->field       = V4L2_FIELD_NONE;
 205
 206         return 0;
 207 }
 208
 209 static int imx074_g_crop(struct v4l2_subdev *sd, struct v4l2_crop *a)
 210 {
 211         struct v4l2_rect *rect = &a->c;
 212
 213         a->type         = V4L2_BUF_TYPE_VIDEO_CAPTURE;
 214         rect->top       = 0;
 215         rect->left      = 0;
 216         rect->width     = IMX074_WIDTH;
 217         rect->height    = IMX074_HEIGHT;
 218
 219         return 0;
 220 }
 221
 222 static int imx074_cropcap(struct v4l2_subdev *sd, struct v4l2_cropcap *a)
 223 {
 224         a->bounds.left                  = 0;
 225         a->bounds.top                   = 0;
 226         a->bounds.width                 = IMX074_WIDTH;
 227         a->bounds.height                = IMX074_HEIGHT;
 228         a->defrect                      = a->bounds;
 229         a->type                         = V4L2_BUF_TYPE_VIDEO_CAPTURE;
 230         a->pixelaspect.numerator        = 1;
 231         a->pixelaspect.denominator      = 1;
 232
 233         return 0;
 234 }
 235
 236 static int imx074_enum_fmt(struct v4l2_subdev *sd, unsigned int index,
 237                            enum v4l2_mbus_pixelcode *code)
 238 {
 239         if ((unsigned int)index >= ARRAY_SIZE(imx074_colour_fmts))
 240                 return -EINVAL;
 241
 242         *code = imx074_colour_fmts[index].code;
 243         return 0;
 244 }
 245
 246 static int imx074_s_stream(struct v4l2_subdev *sd, int enable)
 247 {
 248         struct i2c_client *client = v4l2_get_subdevdata(sd);
 249
 250         /* MODE_SELECT: stream or standby */
 251         return reg_write(client, MODE_SELECT, !!enable);
 252 }
 253
 254 static int imx074_g_chip_ident(struct v4l2_subdev *sd,
 255                                struct v4l2_dbg_chip_ident *id)
 256 {
 257         struct i2c_client *client = v4l2_get_subdevdata(sd);
 258
 259         if (id->match.type != V4L2_CHIP_MATCH_I2C_ADDR)
 260                 return -EINVAL;
 261
 262         if (id->match.addr != client->addr)
 263                 return -ENODEV;
 264
 265         id->ident       = V4L2_IDENT_IMX074;
 266         id->revision    = 0;
 267
 268         return 0;
 269 }
 270
 271 static int imx074_g_mbus_config(struct v4l2_subdev *sd,
 272                                 struct v4l2_mbus_config *cfg)
 273 {
 274         cfg->type = V4L2_MBUS_CSI2;
 275         cfg->flags = V4L2_MBUS_CSI2_2_LANE |
 276                 V4L2_MBUS_CSI2_CHANNEL_0 |
 277                 V4L2_MBUS_CSI2_CONTINUOUS_CLOCK;
 278
 279         return 0;
 280 }
 281
 282 static struct v4l2_subdev_video_ops imx074_subdev_video_ops = {
 283         .s_stream       = imx074_s_stream,
 284         .s_mbus_fmt     = imx074_s_fmt,
 285         .g_mbus_fmt     = imx074_g_fmt,
 286         .try_mbus_fmt   = imx074_try_fmt,
 287         .enum_mbus_fmt  = imx074_enum_fmt,
 288         .g_crop         = imx074_g_crop,
 289         .cropcap        = imx074_cropcap,
 290         .g_mbus_config  = imx074_g_mbus_config,
 291 };
 292
 293 static struct v4l2_subdev_core_ops imx074_subdev_core_ops = {
 294         .g_chip_ident   = imx074_g_chip_ident,
 295 };
 296
 297 static struct v4l2_subdev_ops imx074_subdev_ops = {
 298         .core   = &imx074_subdev_core_ops,
 299         .video  = &imx074_subdev_video_ops,
 300 };
 301
 302 static int imx074_video_probe(struct i2c_client *client)
 303 {
 304         int ret;
 305         u16 id;
 306
 307         /* Read sensor Model ID */
 308         ret = reg_read(client, 0);
 309         if (ret < 0)
 310                 return ret;
 311
 312         id = ret << 8;
 313
 314         ret = reg_read(client, 1);
 315         if (ret < 0)
 316                 return ret;
 317
 318         id |= ret;
 319
 320         dev_info(&client->dev, "Chip ID 0x%04x detected\n", id);
 321
 322         if (id != 0x74)
 323                 return -ENODEV;
 324
 325         /* PLL Setting EXTCLK=24MHz, 22.5times */
 326         reg_write(client, PLL_MULTIPLIER, 0x2D);
 327         reg_write(client, PRE_PLL_CLK_DIV, 0x02);
 328         reg_write(client, PLSTATIM, 0x4B);
 329
 330         /* 2-lane mode */
 331         reg_write(client, 0x3024, 0x00);
 332
 333         reg_write(client, IMAGE_ORIENTATION, 0x00);
 334
 335         /* select RAW mode:
 336          * 0x08+0x08 = top 8 bits
 337          * 0x0a+0x08 = compressed 8-bits
 338          * 0x0a+0x0a = 10 bits
 339          */
 340         reg_write(client, 0x0112, 0x08);
 341         reg_write(client, 0x0113, 0x08);
 342
 343         /* Base setting for High frame mode */
 344         reg_write(client, VNDMY_ABLMGSHLMT, 0x80);
 345         reg_write(client, Y_OPBADDR_START_DI, 0x08);
 346         reg_write(client, 0x3015, 0x37);
 347         reg_write(client, 0x301C, 0x01);
 348         reg_write(client, 0x302C, 0x05);
 349         reg_write(client, 0x3031, 0x26);
 350         reg_write(client, 0x3041, 0x60);
 351         reg_write(client, 0x3051, 0x24);
 352         reg_write(client, 0x3053, 0x34);
 353         reg_write(client, 0x3057, 0xC0);
 354         reg_write(client, 0x305C, 0x09);
 355         reg_write(client, 0x305D, 0x07);
 356         reg_write(client, 0x3060, 0x30);
 357         reg_write(client, 0x3065, 0x00);
 358         reg_write(client, 0x30AA, 0x08);
 359         reg_write(client, 0x30AB, 0x1C);
 360         reg_write(client, 0x30B0, 0x32);
 361         reg_write(client, 0x30B2, 0x83);
 362         reg_write(client, 0x30D3, 0x04);
 363         reg_write(client, 0x3106, 0x78);
 364         reg_write(client, 0x310C, 0x82);
 365         reg_write(client, 0x3304, 0x05);
 366         reg_write(client, 0x3305, 0x04);
 367         reg_write(client, 0x3306, 0x11);
 368         reg_write(client, 0x3307, 0x02);
 369         reg_write(client, 0x3308, 0x0C);
 370         reg_write(client, 0x3309, 0x06);
 371         reg_write(client, 0x330A, 0x08);
 372         reg_write(client, 0x330B, 0x04);
 373         reg_write(client, 0x330C, 0x08);
 374         reg_write(client, 0x330D, 0x06);
 375         reg_write(client, 0x330E, 0x01);
 376         reg_write(client, 0x3381, 0x00);
 377
 378         /* V : 1/2V-addition (1,3), H : 1/2H-averaging (1,3) -> Full HD */
 379         /* 1608 = 1560 + 48 (black lines) */
 380         reg_write(client, FRAME_LENGTH_LINES_HI, 0x06);
 381         reg_write(client, FRAME_LENGTH_LINES_LO, 0x48);
 382         reg_write(client, YADDR_START, 0x00);
 383         reg_write(client, YADDR_END, 0x2F);
 384         /* 0x838 == 2104 */
 385         reg_write(client, X_OUTPUT_SIZE_MSB, 0x08);
 386         reg_write(client, X_OUTPUT_SIZE_LSB, 0x38);
 387         /* 0x618 == 1560 */
 388         reg_write(client, Y_OUTPUT_SIZE_MSB, 0x06);
 389         reg_write(client, Y_OUTPUT_SIZE_LSB, 0x18);
 390         reg_write(client, X_EVEN_INC, 0x01);
 391         reg_write(client, X_ODD_INC, 0x03);
 392         reg_write(client, Y_EVEN_INC, 0x01);
 393         reg_write(client, Y_ODD_INC, 0x03);
 394         reg_write(client, HMODEADD, 0x00);
 395         reg_write(client, VMODEADD, 0x16);
 396         reg_write(client, VAPPLINE_START, 0x24);
 397         reg_write(client, VAPPLINE_END, 0x53);
 398         reg_write(client, SHUTTER, 0x00);
 399         reg_write(client, HADDAVE, 0x80);
 400
 401         reg_write(client, LANESEL, 0x00);
 402
 403         reg_write(client, GROUPED_PARAMETER_HOLD, 0x00);        /* off */
 404
 405         return 0;
 406 }
 407
 408 static int imx074_probe(struct i2c_client *client,
 409                         const struct i2c_device_id *did)
 410 {
 411         struct imx074 *priv;
 412         struct i2c_adapter *adapter = to_i2c_adapter(client->dev.parent);
 413         struct soc_camera_link *icl = soc_camera_i2c_to_link(client);
 414         int ret;
 415
 416         if (!icl) {
 417                 dev_err(&client->dev, "IMX074: missing platform data!\n");
 418                 return -EINVAL;
 419         }
 420
 421         if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) {
 422                 dev_warn(&adapter->dev,
 423                          "I2C-Adapter doesn't support I2C_FUNC_SMBUS_BYTE\n");
 424                 return -EIO;
 425         }
 426
 427         priv = kzalloc(sizeof(struct imx074), GFP_KERNEL);
 428         if (!priv)
 429                 return -ENOMEM;
 430
 431         v4l2_i2c_subdev_init(&priv->subdev, client, &imx074_subdev_ops);
 432
 433         priv->fmt       = &imx074_colour_fmts[0];
 434
 435         ret = imx074_video_probe(client);
 436         if (ret < 0) {
 437                 kfree(priv);
 438                 return ret;
 439         }
 440
 441         return ret;
 442 }
 443
 444 static int imx074_remove(struct i2c_client *client)
 445 {
 446         struct imx074 *priv = to_imx074(client);
 447         struct soc_camera_link *icl = soc_camera_i2c_to_link(client);
 448
 449         if (icl->free_bus)
 450                 icl->free_bus(icl);
 451         kfree(priv);
 452
 453         return 0;
 454 }
 455
 456 static const struct i2c_device_id imx074_id[] = {
 457         { "imx074", 0 },
 458         { }
 459 };
 460 MODULE_DEVICE_TABLE(i2c, imx074_id);
 461
 462 static struct i2c_driver imx074_i2c_driver = {
 463         .driver = {
 464                 .name = "imx074",
 465         },
 466         .probe          = imx074_probe,
 467         .remove         = imx074_remove,
 468         .id_table       = imx074_id,
 469 };
 470
 471 static int __init imx074_mod_init(void)
 472 {
 473         return i2c_add_driver(&imx074_i2c_driver);
 474 }
 475
 476 static void __exit imx074_mod_exit(void)
 477 {
 478         i2c_del_driver(&imx074_i2c_driver);
 479 }
 480
 481 module_init(imx074_mod_init);
 482 module_exit(imx074_mod_exit);
 483
 484 MODULE_DESCRIPTION("Sony IMX074 Camera driver");
 485 MODULE_AUTHOR("Guennadi Liakhovetski <g.liakhovetski@gmx.de>");
 486 MODULE_LICENSE("GPL v2");