drivers/media/i2c/soc_camera/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-async.h>
  22 #include <media/v4l2-clk.h>
  23 #include <media/v4l2-subdev.h>
  24
  25 /* IMX074 registers */
  26
  27 #define MODE_SELECT                     0x0100
  28 #define IMAGE_ORIENTATION               0x0101
  29 #define GROUPED_PARAMETER_HOLD          0x0104
  30
  31 /* Integration Time */
  32 #define COARSE_INTEGRATION_TIME_HI      0x0202
  33 #define COARSE_INTEGRATION_TIME_LO      0x0203
  34 /* Gain */
  35 #define ANALOGUE_GAIN_CODE_GLOBAL_HI    0x0204
  36 #define ANALOGUE_GAIN_CODE_GLOBAL_LO    0x0205
  37
  38 /* PLL registers */
  39 #define PRE_PLL_CLK_DIV                 0x0305
  40 #define PLL_MULTIPLIER                  0x0307
  41 #define PLSTATIM                        0x302b
  42 #define VNDMY_ABLMGSHLMT                0x300a
  43 #define Y_OPBADDR_START_DI              0x3014
  44 /* mode setting */
  45 #define FRAME_LENGTH_LINES_HI           0x0340
  46 #define FRAME_LENGTH_LINES_LO           0x0341
  47 #define LINE_LENGTH_PCK_HI              0x0342
  48 #define LINE_LENGTH_PCK_LO              0x0343
  49 #define YADDR_START                     0x0347
  50 #define YADDR_END                       0x034b
  51 #define X_OUTPUT_SIZE_MSB               0x034c
  52 #define X_OUTPUT_SIZE_LSB               0x034d
  53 #define Y_OUTPUT_SIZE_MSB               0x034e
  54 #define Y_OUTPUT_SIZE_LSB               0x034f
  55 #define X_EVEN_INC                      0x0381
  56 #define X_ODD_INC                       0x0383
  57 #define Y_EVEN_INC                      0x0385
  58 #define Y_ODD_INC                       0x0387
  59
  60 #define HMODEADD                        0x3001
  61 #define VMODEADD                        0x3016
  62 #define VAPPLINE_START                  0x3069
  63 #define VAPPLINE_END                    0x306b
  64 #define SHUTTER                         0x3086
  65 #define HADDAVE                         0x30e8
  66 #define LANESEL                         0x3301
  67
  68 /* IMX074 supported geometry */
  69 #define IMX074_WIDTH                    1052
  70 #define IMX074_HEIGHT                   780
  71
  72 /* IMX074 has only one fixed colorspace per pixelcode */
  73 struct imx074_datafmt {
  74         u32     code;
  75         enum v4l2_colorspace            colorspace;
  76 };
  77
  78 struct imx074 {
  79         struct v4l2_subdev              subdev;
  80         const struct imx074_datafmt     *fmt;
  81         struct v4l2_clk                 *clk;
  82 };
  83
  84 static const struct imx074_datafmt imx074_colour_fmts[] = {
  85         {MEDIA_BUS_FMT_SBGGR8_1X8, V4L2_COLORSPACE_SRGB},
  86 };
  87
  88 static struct imx074 *to_imx074(const struct i2c_client *client)
  89 {
  90         return container_of(i2c_get_clientdata(client), struct imx074, subdev);
  91 }
  92
  93 /* Find a data format by a pixel code in an array */
  94 static const struct imx074_datafmt *imx074_find_datafmt(u32 code)
  95 {
  96         int i;
  97
  98         for (i = 0; i < ARRAY_SIZE(imx074_colour_fmts); i++)
  99                 if (imx074_colour_fmts[i].code == code)
 100                         return imx074_colour_fmts + i;
 101
 102         return NULL;
 103 }
 104
 105 static int reg_write(struct i2c_client *client, const u16 addr, const u8 data)
 106 {
 107         struct i2c_adapter *adap = client->adapter;
 108         struct i2c_msg msg;
 109         unsigned char tx[3];
 110         int ret;
 111
 112         msg.addr = client->addr;
 113         msg.buf = tx;
 114         msg.len = 3;
 115         msg.flags = 0;
 116
 117         tx[0] = addr >> 8;
 118         tx[1] = addr & 0xff;
 119         tx[2] = data;
 120
 121         ret = i2c_transfer(adap, &msg, 1);
 122
 123         mdelay(2);
 124
 125         return ret == 1 ? 0 : -EIO;
 126 }
 127
 128 static int reg_read(struct i2c_client *client, const u16 addr)
 129 {
 130         u8 buf[2] = {addr >> 8, addr & 0xff};
 131         int ret;
 132         struct i2c_msg msgs[] = {
 133                 {
 134                         .addr  = client->addr,
 135                         .flags = 0,
 136                         .len   = 2,
 137                         .buf   = buf,
 138                 }, {
 139                         .addr  = client->addr,
 140                         .flags = I2C_M_RD,
 141                         .len   = 2,
 142                         .buf   = buf,
 143                 },
 144         };
 145
 146         ret = i2c_transfer(client->adapter, msgs, ARRAY_SIZE(msgs));
 147         if (ret < 0) {
 148                 dev_warn(&client->dev, "Reading register %x from %x failed\n",
 149                          addr, client->addr);
 150                 return ret;
 151         }
 152
 153         return buf[0] & 0xff; /* no sign-extension */
 154 }
 155
 156 static int imx074_try_fmt(struct v4l2_subdev *sd,
 157                           struct v4l2_mbus_framefmt *mf)
 158 {
 159         const struct imx074_datafmt *fmt = imx074_find_datafmt(mf->code);
 160
 161         dev_dbg(sd->v4l2_dev->dev, "%s(%u)\n", __func__, mf->code);
 162
 163         if (!fmt) {
 164                 mf->code        = imx074_colour_fmts[0].code;
 165                 mf->colorspace  = imx074_colour_fmts[0].colorspace;
 166         }
 167
 168         mf->width       = IMX074_WIDTH;
 169         mf->height      = IMX074_HEIGHT;
 170         mf->field       = V4L2_FIELD_NONE;
 171
 172         return 0;
 173 }
 174
 175 static int imx074_s_fmt(struct v4l2_subdev *sd,
 176                         struct v4l2_mbus_framefmt *mf)
 177 {
 178         struct i2c_client *client = v4l2_get_subdevdata(sd);
 179         struct imx074 *priv = to_imx074(client);
 180
 181         dev_dbg(sd->v4l2_dev->dev, "%s(%u)\n", __func__, mf->code);
 182
 183         /* MIPI CSI could have changed the format, double-check */
 184         if (!imx074_find_datafmt(mf->code))
 185                 return -EINVAL;
 186
 187         imx074_try_fmt(sd, mf);
 188
 189         priv->fmt = imx074_find_datafmt(mf->code);
 190
 191         return 0;
 192 }
 193
 194 static int imx074_get_fmt(struct v4l2_subdev *sd,
 195                 struct v4l2_subdev_pad_config *cfg,
 196                 struct v4l2_subdev_format *format)
 197 {
 198         struct v4l2_mbus_framefmt *mf = &format->format;
 199         struct i2c_client *client = v4l2_get_subdevdata(sd);
 200         struct imx074 *priv = to_imx074(client);
 201
 202         const struct imx074_datafmt *fmt = priv->fmt;
 203
 204         if (format->pad)
 205                 return -EINVAL;
 206
 207         mf->code        = fmt->code;
 208         mf->colorspace  = fmt->colorspace;
 209         mf->width       = IMX074_WIDTH;
 210         mf->height      = IMX074_HEIGHT;
 211         mf->field       = V4L2_FIELD_NONE;
 212
 213         return 0;
 214 }
 215
 216 static int imx074_g_crop(struct v4l2_subdev *sd, struct v4l2_crop *a)
 217 {
 218         struct v4l2_rect *rect = &a->c;
 219
 220         a->type         = V4L2_BUF_TYPE_VIDEO_CAPTURE;
 221         rect->top       = 0;
 222         rect->left      = 0;
 223         rect->width     = IMX074_WIDTH;
 224         rect->height    = IMX074_HEIGHT;
 225
 226         return 0;
 227 }
 228
 229 static int imx074_cropcap(struct v4l2_subdev *sd, struct v4l2_cropcap *a)
 230 {
 231         a->bounds.left                  = 0;
 232         a->bounds.top                   = 0;
 233         a->bounds.width                 = IMX074_WIDTH;
 234         a->bounds.height                = IMX074_HEIGHT;
 235         a->defrect                      = a->bounds;
 236         a->type                         = V4L2_BUF_TYPE_VIDEO_CAPTURE;
 237         a->pixelaspect.numerator        = 1;
 238         a->pixelaspect.denominator      = 1;
 239
 240         return 0;
 241 }
 242
 243 static int imx074_enum_mbus_code(struct v4l2_subdev *sd,
 244                 struct v4l2_subdev_pad_config *cfg,
 245                 struct v4l2_subdev_mbus_code_enum *code)
 246 {
 247         if (code->pad ||
 248             (unsigned int)code->index >= ARRAY_SIZE(imx074_colour_fmts))
 249                 return -EINVAL;
 250
 251         code->code = imx074_colour_fmts[code->index].code;
 252         return 0;
 253 }
 254
 255 static int imx074_s_stream(struct v4l2_subdev *sd, int enable)
 256 {
 257         struct i2c_client *client = v4l2_get_subdevdata(sd);
 258
 259         /* MODE_SELECT: stream or standby */
 260         return reg_write(client, MODE_SELECT, !!enable);
 261 }
 262
 263 static int imx074_s_power(struct v4l2_subdev *sd, int on)
 264 {
 265         struct i2c_client *client = v4l2_get_subdevdata(sd);
 266         struct soc_camera_subdev_desc *ssdd = soc_camera_i2c_to_desc(client);
 267         struct imx074 *priv = to_imx074(client);
 268
 269         return soc_camera_set_power(&client->dev, ssdd, priv->clk, on);
 270 }
 271
 272 static int imx074_g_mbus_config(struct v4l2_subdev *sd,
 273                                 struct v4l2_mbus_config *cfg)
 274 {
 275         cfg->type = V4L2_MBUS_CSI2;
 276         cfg->flags = V4L2_MBUS_CSI2_2_LANE |
 277                 V4L2_MBUS_CSI2_CHANNEL_0 |
 278                 V4L2_MBUS_CSI2_CONTINUOUS_CLOCK;
 279
 280         return 0;
 281 }
 282
 283 static struct v4l2_subdev_video_ops imx074_subdev_video_ops = {
 284         .s_stream       = imx074_s_stream,
 285         .s_mbus_fmt     = imx074_s_fmt,
 286         .try_mbus_fmt   = imx074_try_fmt,
 287         .g_crop         = imx074_g_crop,
 288         .cropcap        = imx074_cropcap,
 289         .g_mbus_config  = imx074_g_mbus_config,
 290 };
 291
 292 static struct v4l2_subdev_core_ops imx074_subdev_core_ops = {
 293         .s_power        = imx074_s_power,
 294 };
 295
 296 static const struct v4l2_subdev_pad_ops imx074_subdev_pad_ops = {
 297         .enum_mbus_code = imx074_enum_mbus_code,
 298         .get_fmt        = imx074_get_fmt,
 299 };
 300
 301 static struct v4l2_subdev_ops imx074_subdev_ops = {
 302         .core   = &imx074_subdev_core_ops,
 303         .video  = &imx074_subdev_video_ops,
 304         .pad    = &imx074_subdev_pad_ops,
 305 };
 306
 307 static int imx074_video_probe(struct i2c_client *client)
 308 {
 309         struct v4l2_subdev *subdev = i2c_get_clientdata(client);
 310         int ret;
 311         u16 id;
 312
 313         ret = imx074_s_power(subdev, 1);
 314         if (ret < 0)
 315                 return ret;
 316
 317         /* Read sensor Model ID */
 318         ret = reg_read(client, 0);
 319         if (ret < 0)
 320                 goto done;
 321
 322         id = ret << 8;
 323
 324         ret = reg_read(client, 1);
 325         if (ret < 0)
 326                 goto done;
 327
 328         id |= ret;
 329
 330         dev_info(&client->dev, "Chip ID 0x%04x detected\n", id);
 331
 332         if (id != 0x74) {
 333                 ret = -ENODEV;
 334                 goto done;
 335         }
 336
 337         /* PLL Setting EXTCLK=24MHz, 22.5times */
 338         reg_write(client, PLL_MULTIPLIER, 0x2D);
 339         reg_write(client, PRE_PLL_CLK_DIV, 0x02);
 340         reg_write(client, PLSTATIM, 0x4B);
 341
 342         /* 2-lane mode */
 343         reg_write(client, 0x3024, 0x00);
 344
 345         reg_write(client, IMAGE_ORIENTATION, 0x00);
 346
 347         /* select RAW mode:
 348          * 0x08+0x08 = top 8 bits
 349          * 0x0a+0x08 = compressed 8-bits
 350          * 0x0a+0x0a = 10 bits
 351          */
 352         reg_write(client, 0x0112, 0x08);
 353         reg_write(client, 0x0113, 0x08);
 354
 355         /* Base setting for High frame mode */
 356         reg_write(client, VNDMY_ABLMGSHLMT, 0x80);
 357         reg_write(client, Y_OPBADDR_START_DI, 0x08);
 358         reg_write(client, 0x3015, 0x37);
 359         reg_write(client, 0x301C, 0x01);
 360         reg_write(client, 0x302C, 0x05);
 361         reg_write(client, 0x3031, 0x26);
 362         reg_write(client, 0x3041, 0x60);
 363         reg_write(client, 0x3051, 0x24);
 364         reg_write(client, 0x3053, 0x34);
 365         reg_write(client, 0x3057, 0xC0);
 366         reg_write(client, 0x305C, 0x09);
 367         reg_write(client, 0x305D, 0x07);
 368         reg_write(client, 0x3060, 0x30);
 369         reg_write(client, 0x3065, 0x00);
 370         reg_write(client, 0x30AA, 0x08);
 371         reg_write(client, 0x30AB, 0x1C);
 372         reg_write(client, 0x30B0, 0x32);
 373         reg_write(client, 0x30B2, 0x83);
 374         reg_write(client, 0x30D3, 0x04);
 375         reg_write(client, 0x3106, 0x78);
 376         reg_write(client, 0x310C, 0x82);
 377         reg_write(client, 0x3304, 0x05);
 378         reg_write(client, 0x3305, 0x04);
 379         reg_write(client, 0x3306, 0x11);
 380         reg_write(client, 0x3307, 0x02);
 381         reg_write(client, 0x3308, 0x0C);
 382         reg_write(client, 0x3309, 0x06);
 383         reg_write(client, 0x330A, 0x08);
 384         reg_write(client, 0x330B, 0x04);
 385         reg_write(client, 0x330C, 0x08);
 386         reg_write(client, 0x330D, 0x06);
 387         reg_write(client, 0x330E, 0x01);
 388         reg_write(client, 0x3381, 0x00);
 389
 390         /* V : 1/2V-addition (1,3), H : 1/2H-averaging (1,3) -> Full HD */
 391         /* 1608 = 1560 + 48 (black lines) */
 392         reg_write(client, FRAME_LENGTH_LINES_HI, 0x06);
 393         reg_write(client, FRAME_LENGTH_LINES_LO, 0x48);
 394         reg_write(client, YADDR_START, 0x00);
 395         reg_write(client, YADDR_END, 0x2F);
 396         /* 0x838 == 2104 */
 397         reg_write(client, X_OUTPUT_SIZE_MSB, 0x08);
 398         reg_write(client, X_OUTPUT_SIZE_LSB, 0x38);
 399         /* 0x618 == 1560 */
 400         reg_write(client, Y_OUTPUT_SIZE_MSB, 0x06);
 401         reg_write(client, Y_OUTPUT_SIZE_LSB, 0x18);
 402         reg_write(client, X_EVEN_INC, 0x01);
 403         reg_write(client, X_ODD_INC, 0x03);
 404         reg_write(client, Y_EVEN_INC, 0x01);
 405         reg_write(client, Y_ODD_INC, 0x03);
 406         reg_write(client, HMODEADD, 0x00);
 407         reg_write(client, VMODEADD, 0x16);
 408         reg_write(client, VAPPLINE_START, 0x24);
 409         reg_write(client, VAPPLINE_END, 0x53);
 410         reg_write(client, SHUTTER, 0x00);
 411         reg_write(client, HADDAVE, 0x80);
 412
 413         reg_write(client, LANESEL, 0x00);
 414
 415         reg_write(client, GROUPED_PARAMETER_HOLD, 0x00);        /* off */
 416
 417         ret = 0;
 418
 419 done:
 420         imx074_s_power(subdev, 0);
 421         return ret;
 422 }
 423
 424 static int imx074_probe(struct i2c_client *client,
 425                         const struct i2c_device_id *did)
 426 {
 427         struct imx074 *priv;
 428         struct i2c_adapter *adapter = to_i2c_adapter(client->dev.parent);
 429         struct soc_camera_subdev_desc *ssdd = soc_camera_i2c_to_desc(client);
 430         int ret;
 431
 432         if (!ssdd) {
 433                 dev_err(&client->dev, "IMX074: missing platform data!\n");
 434                 return -EINVAL;
 435         }
 436
 437         if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) {
 438                 dev_warn(&adapter->dev,
 439                          "I2C-Adapter doesn't support I2C_FUNC_SMBUS_BYTE\n");
 440                 return -EIO;
 441         }
 442
 443         priv = devm_kzalloc(&client->dev, sizeof(struct imx074), GFP_KERNEL);
 444         if (!priv)
 445                 return -ENOMEM;
 446
 447         v4l2_i2c_subdev_init(&priv->subdev, client, &imx074_subdev_ops);
 448
 449         priv->fmt       = &imx074_colour_fmts[0];
 450
 451         priv->clk = v4l2_clk_get(&client->dev, "mclk");
 452         if (IS_ERR(priv->clk)) {
 453                 dev_info(&client->dev, "Error %ld getting clock\n", PTR_ERR(priv->clk));
 454                 return -EPROBE_DEFER;
 455         }
 456
 457         ret = soc_camera_power_init(&client->dev, ssdd);
 458         if (ret < 0)
 459                 goto epwrinit;
 460
 461         ret = imx074_video_probe(client);
 462         if (ret < 0)
 463                 goto eprobe;
 464
 465         ret = v4l2_async_register_subdev(&priv->subdev);
 466         if (!ret)
 467                 return 0;
 468
 469 epwrinit:
 470 eprobe:
 471         v4l2_clk_put(priv->clk);
 472         return ret;
 473 }
 474
 475 static int imx074_remove(struct i2c_client *client)
 476 {
 477         struct soc_camera_subdev_desc *ssdd = soc_camera_i2c_to_desc(client);
 478         struct imx074 *priv = to_imx074(client);
 479
 480         v4l2_async_unregister_subdev(&priv->subdev);
 481         v4l2_clk_put(priv->clk);
 482
 483         if (ssdd->free_bus)
 484                 ssdd->free_bus(ssdd);
 485
 486         return 0;
 487 }
 488
 489 static const struct i2c_device_id imx074_id[] = {
 490         { "imx074", 0 },
 491         { }
 492 };
 493 MODULE_DEVICE_TABLE(i2c, imx074_id);
 494
 495 static struct i2c_driver imx074_i2c_driver = {
 496         .driver = {
 497                 .name = "imx074",
 498         },
 499         .probe          = imx074_probe,
 500         .remove         = imx074_remove,
 501         .id_table       = imx074_id,
 502 };
 503
 504 module_i2c_driver(imx074_i2c_driver);
 505
 506 MODULE_DESCRIPTION("Sony IMX074 Camera driver");
 507 MODULE_AUTHOR("Guennadi Liakhovetski <g.liakhovetski@gmx.de>");
 508 MODULE_LICENSE("GPL v2");