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
  19 #include <media/soc_camera.h>
  20 #include <media/v4l2-subdev.h>
  21 #include <media/v4l2-chip-ident.h>
  22
  23 /* IMX074 registers */
  24
  25 #define MODE_SELECT                     0x0100
  26 #define IMAGE_ORIENTATION               0x0101
  27 #define GROUPED_PARAMETER_HOLD          0x0104
  28
  29 /* Integration Time */
  30 #define COARSE_INTEGRATION_TIME_HI      0x0202
  31 #define COARSE_INTEGRATION_TIME_LO      0x0203
  32 /* Gain */
  33 #define ANALOGUE_GAIN_CODE_GLOBAL_HI    0x0204
  34 #define ANALOGUE_GAIN_CODE_GLOBAL_LO    0x0205
  35
  36 /* PLL registers */
  37 #define PRE_PLL_CLK_DIV                 0x0305
  38 #define PLL_MULTIPLIER                  0x0307
  39 #define PLSTATIM                        0x302b
  40 #define VNDMY_ABLMGSHLMT                0x300a
  41 #define Y_OPBADDR_START_DI              0x3014
  42 /* mode setting */
  43 #define FRAME_LENGTH_LINES_HI           0x0340
  44 #define FRAME_LENGTH_LINES_LO           0x0341
  45 #define LINE_LENGTH_PCK_HI              0x0342
  46 #define LINE_LENGTH_PCK_LO              0x0343
  47 #define YADDR_START                     0x0347
  48 #define YADDR_END                       0x034b
  49 #define X_OUTPUT_SIZE_MSB               0x034c
  50 #define X_OUTPUT_SIZE_LSB               0x034d
  51 #define Y_OUTPUT_SIZE_MSB               0x034e
  52 #define Y_OUTPUT_SIZE_LSB               0x034f
  53 #define X_EVEN_INC                      0x0381
  54 #define X_ODD_INC                       0x0383
  55 #define Y_EVEN_INC                      0x0385
  56 #define Y_ODD_INC                       0x0387
  57
  58 #define HMODEADD                        0x3001
  59 #define VMODEADD                        0x3016
  60 #define VAPPLINE_START                  0x3069
  61 #define VAPPLINE_END                    0x306b
  62 #define SHUTTER                         0x3086
  63 #define HADDAVE                         0x30e8
  64 #define LANESEL                         0x3301
  65
  66 /* IMX074 supported geometry */
  67 #define IMX074_WIDTH                    1052
  68 #define IMX074_HEIGHT                   780
  69
  70 /* IMX074 has only one fixed colorspace per pixelcode */
  71 struct imx074_datafmt {
  72         enum v4l2_mbus_pixelcode        code;
  73         enum v4l2_colorspace            colorspace;
  74 };
  75
  76 struct imx074 {
  77         struct v4l2_subdev              subdev;
  78         const struct imx074_datafmt     *fmt;
  79 };
  80
  81 static const struct imx074_datafmt imx074_colour_fmts[] = {
  82         {V4L2_MBUS_FMT_SBGGR8_1X8, V4L2_COLORSPACE_SRGB},
  83 };
  84
  85 static struct imx074 *to_imx074(const struct i2c_client *client)
  86 {
  87         return container_of(i2c_get_clientdata(client), struct imx074, subdev);
  88 }
  89
  90 /* Find a data format by a pixel code in an array */
  91 static const struct imx074_datafmt *imx074_find_datafmt(enum v4l2_mbus_pixelcode code)
  92 {
  93         int i;
  94
  95         for (i = 0; i < ARRAY_SIZE(imx074_colour_fmts); i++)
  96                 if (imx074_colour_fmts[i].code == code)
  97                         return imx074_colour_fmts + i;
  98
  99         return NULL;
 100 }
 101
 102 static int reg_write(struct i2c_client *client, const u16 addr, const u8 data)
 103 {
 104         struct i2c_adapter *adap = client->adapter;
 105         struct i2c_msg msg;
 106         unsigned char tx[3];
 107         int ret;
 108
 109         msg.addr = client->addr;
 110         msg.buf = tx;
 111         msg.len = 3;
 112         msg.flags = 0;
 113
 114         tx[0] = addr >> 8;
 115         tx[1] = addr & 0xff;
 116         tx[2] = data;
 117
 118         ret = i2c_transfer(adap, &msg, 1);
 119
 120         mdelay(2);
 121
 122         return ret == 1 ? 0 : -EIO;
 123 }
 124
 125 static int reg_read(struct i2c_client *client, const u16 addr)
 126 {
 127         u8 buf[2] = {addr >> 8, addr & 0xff};
 128         int ret;
 129         struct i2c_msg msgs[] = {
 130                 {
 131                         .addr  = client->addr,
 132                         .flags = 0,
 133                         .len   = 2,
 134                         .buf   = buf,
 135                 }, {
 136                         .addr  = client->addr,
 137                         .flags = I2C_M_RD,
 138                         .len   = 2,
 139                         .buf   = buf,
 140                 },
 141         };
 142
 143         ret = i2c_transfer(client->adapter, msgs, ARRAY_SIZE(msgs));
 144         if (ret < 0) {
 145                 dev_warn(&client->dev, "Reading register %x from %x failed\n",
 146                          addr, client->addr);
 147                 return ret;
 148         }
 149
 150         return buf[0] & 0xff; /* no sign-extension */
 151 }
 152
 153 static int imx074_try_fmt(struct v4l2_subdev *sd,
 154                           struct v4l2_mbus_framefmt *mf)
 155 {
 156         const struct imx074_datafmt *fmt = imx074_find_datafmt(mf->code);
 157
 158         dev_dbg(sd->v4l2_dev->dev, "%s(%u)\n", __func__, mf->code);
 159
 160         if (!fmt) {
 161                 mf->code        = imx074_colour_fmts[0].code;
 162                 mf->colorspace  = imx074_colour_fmts[0].colorspace;
 163         }
 164
 165         mf->width       = IMX074_WIDTH;
 166         mf->height      = IMX074_HEIGHT;
 167         mf->field       = V4L2_FIELD_NONE;
 168
 169         return 0;
 170 }
 171
 172 static int imx074_s_fmt(struct v4l2_subdev *sd,
 173                         struct v4l2_mbus_framefmt *mf)
 174 {
 175         struct i2c_client *client = v4l2_get_subdevdata(sd);
 176         struct imx074 *priv = to_imx074(client);
 177
 178         dev_dbg(sd->v4l2_dev->dev, "%s(%u)\n", __func__, mf->code);
 179
 180         /* MIPI CSI could have changed the format, double-check */
 181         if (!imx074_find_datafmt(mf->code))
 182                 return -EINVAL;
 183
 184         imx074_try_fmt(sd, mf);
 185
 186         priv->fmt = imx074_find_datafmt(mf->code);
 187
 188         return 0;
 189 }
 190
 191 static int imx074_g_fmt(struct v4l2_subdev *sd,
 192                         struct v4l2_mbus_framefmt *mf)
 193 {
 194         struct i2c_client *client = v4l2_get_subdevdata(sd);
 195         struct imx074 *priv = to_imx074(client);
 196
 197         const struct imx074_datafmt *fmt = priv->fmt;
 198
 199         mf->code        = fmt->code;
 200         mf->colorspace  = fmt->colorspace;
 201         mf->width       = IMX074_WIDTH;
 202         mf->height      = IMX074_HEIGHT;
 203         mf->field       = V4L2_FIELD_NONE;
 204
 205         return 0;
 206 }
 207
 208 static int imx074_g_crop(struct v4l2_subdev *sd, struct v4l2_crop *a)
 209 {
 210         struct v4l2_rect *rect = &a->c;
 211
 212         a->type         = V4L2_BUF_TYPE_VIDEO_CAPTURE;
 213         rect->top       = 0;
 214         rect->left      = 0;
 215         rect->width     = IMX074_WIDTH;
 216         rect->height    = IMX074_HEIGHT;
 217
 218         return 0;
 219 }
 220
 221 static int imx074_cropcap(struct v4l2_subdev *sd, struct v4l2_cropcap *a)
 222 {
 223         a->bounds.left                  = 0;
 224         a->bounds.top                   = 0;
 225         a->bounds.width                 = IMX074_WIDTH;
 226         a->bounds.height                = IMX074_HEIGHT;
 227         a->defrect                      = a->bounds;
 228         a->type                         = V4L2_BUF_TYPE_VIDEO_CAPTURE;
 229         a->pixelaspect.numerator        = 1;
 230         a->pixelaspect.denominator      = 1;
 231
 232         return 0;
 233 }
 234
 235 static int imx074_enum_fmt(struct v4l2_subdev *sd, unsigned int index,
 236                            enum v4l2_mbus_pixelcode *code)
 237 {
 238         if ((unsigned int)index >= ARRAY_SIZE(imx074_colour_fmts))
 239                 return -EINVAL;
 240
 241         *code = imx074_colour_fmts[index].code;
 242         return 0;
 243 }
 244
 245 static int imx074_s_stream(struct v4l2_subdev *sd, int enable)
 246 {
 247         struct i2c_client *client = v4l2_get_subdevdata(sd);
 248
 249         /* MODE_SELECT: stream or standby */
 250         return reg_write(client, MODE_SELECT, !!enable);
 251 }
 252
 253 static int imx074_g_chip_ident(struct v4l2_subdev *sd,
 254                                struct v4l2_dbg_chip_ident *id)
 255 {
 256         struct i2c_client *client = v4l2_get_subdevdata(sd);
 257
 258         if (id->match.type != V4L2_CHIP_MATCH_I2C_ADDR)
 259                 return -EINVAL;
 260
 261         if (id->match.addr != client->addr)
 262                 return -ENODEV;
 263
 264         id->ident       = V4L2_IDENT_IMX074;
 265         id->revision    = 0;
 266
 267         return 0;
 268 }
 269
 270 static int imx074_g_mbus_config(struct v4l2_subdev *sd,
 271                                 struct v4l2_mbus_config *cfg)
 272 {
 273         cfg->type = V4L2_MBUS_CSI2;
 274         cfg->flags = V4L2_MBUS_CSI2_2_LANE |
 275                 V4L2_MBUS_CSI2_CHANNEL_0 |
 276                 V4L2_MBUS_CSI2_CONTINUOUS_CLOCK;
 277
 278         return 0;
 279 }
 280
 281 static struct v4l2_subdev_video_ops imx074_subdev_video_ops = {
 282         .s_stream       = imx074_s_stream,
 283         .s_mbus_fmt     = imx074_s_fmt,
 284         .g_mbus_fmt     = imx074_g_fmt,
 285         .try_mbus_fmt   = imx074_try_fmt,
 286         .enum_mbus_fmt  = imx074_enum_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         .g_chip_ident   = imx074_g_chip_ident,
 294 };
 295
 296 static struct v4l2_subdev_ops imx074_subdev_ops = {
 297         .core   = &imx074_subdev_core_ops,
 298         .video  = &imx074_subdev_video_ops,
 299 };
 300
 301 static int imx074_video_probe(struct i2c_client *client)
 302 {
 303         int ret;
 304         u16 id;
 305
 306         /* Read sensor Model ID */
 307         ret = reg_read(client, 0);
 308         if (ret < 0)
 309                 return ret;
 310
 311         id = ret << 8;
 312
 313         ret = reg_read(client, 1);
 314         if (ret < 0)
 315                 return ret;
 316
 317         id |= ret;
 318
 319         dev_info(&client->dev, "Chip ID 0x%04x detected\n", id);
 320
 321         if (id != 0x74)
 322                 return -ENODEV;
 323
 324         /* PLL Setting EXTCLK=24MHz, 22.5times */
 325         reg_write(client, PLL_MULTIPLIER, 0x2D);
 326         reg_write(client, PRE_PLL_CLK_DIV, 0x02);
 327         reg_write(client, PLSTATIM, 0x4B);
 328
 329         /* 2-lane mode */
 330         reg_write(client, 0x3024, 0x00);
 331
 332         reg_write(client, IMAGE_ORIENTATION, 0x00);
 333
 334         /* select RAW mode:
 335          * 0x08+0x08 = top 8 bits
 336          * 0x0a+0x08 = compressed 8-bits
 337          * 0x0a+0x0a = 10 bits
 338          */
 339         reg_write(client, 0x0112, 0x08);
 340         reg_write(client, 0x0113, 0x08);
 341
 342         /* Base setting for High frame mode */
 343         reg_write(client, VNDMY_ABLMGSHLMT, 0x80);
 344         reg_write(client, Y_OPBADDR_START_DI, 0x08);
 345         reg_write(client, 0x3015, 0x37);
 346         reg_write(client, 0x301C, 0x01);
 347         reg_write(client, 0x302C, 0x05);
 348         reg_write(client, 0x3031, 0x26);
 349         reg_write(client, 0x3041, 0x60);
 350         reg_write(client, 0x3051, 0x24);
 351         reg_write(client, 0x3053, 0x34);
 352         reg_write(client, 0x3057, 0xC0);
 353         reg_write(client, 0x305C, 0x09);
 354         reg_write(client, 0x305D, 0x07);
 355         reg_write(client, 0x3060, 0x30);
 356         reg_write(client, 0x3065, 0x00);
 357         reg_write(client, 0x30AA, 0x08);
 358         reg_write(client, 0x30AB, 0x1C);
 359         reg_write(client, 0x30B0, 0x32);
 360         reg_write(client, 0x30B2, 0x83);
 361         reg_write(client, 0x30D3, 0x04);
 362         reg_write(client, 0x3106, 0x78);
 363         reg_write(client, 0x310C, 0x82);
 364         reg_write(client, 0x3304, 0x05);
 365         reg_write(client, 0x3305, 0x04);
 366         reg_write(client, 0x3306, 0x11);
 367         reg_write(client, 0x3307, 0x02);
 368         reg_write(client, 0x3308, 0x0C);
 369         reg_write(client, 0x3309, 0x06);
 370         reg_write(client, 0x330A, 0x08);
 371         reg_write(client, 0x330B, 0x04);
 372         reg_write(client, 0x330C, 0x08);
 373         reg_write(client, 0x330D, 0x06);
 374         reg_write(client, 0x330E, 0x01);
 375         reg_write(client, 0x3381, 0x00);
 376
 377         /* V : 1/2V-addition (1,3), H : 1/2H-averaging (1,3) -> Full HD */
 378         /* 1608 = 1560 + 48 (black lines) */
 379         reg_write(client, FRAME_LENGTH_LINES_HI, 0x06);
 380         reg_write(client, FRAME_LENGTH_LINES_LO, 0x48);
 381         reg_write(client, YADDR_START, 0x00);
 382         reg_write(client, YADDR_END, 0x2F);
 383         /* 0x838 == 2104 */
 384         reg_write(client, X_OUTPUT_SIZE_MSB, 0x08);
 385         reg_write(client, X_OUTPUT_SIZE_LSB, 0x38);
 386         /* 0x618 == 1560 */
 387         reg_write(client, Y_OUTPUT_SIZE_MSB, 0x06);
 388         reg_write(client, Y_OUTPUT_SIZE_LSB, 0x18);
 389         reg_write(client, X_EVEN_INC, 0x01);
 390         reg_write(client, X_ODD_INC, 0x03);
 391         reg_write(client, Y_EVEN_INC, 0x01);
 392         reg_write(client, Y_ODD_INC, 0x03);
 393         reg_write(client, HMODEADD, 0x00);
 394         reg_write(client, VMODEADD, 0x16);
 395         reg_write(client, VAPPLINE_START, 0x24);
 396         reg_write(client, VAPPLINE_END, 0x53);
 397         reg_write(client, SHUTTER, 0x00);
 398         reg_write(client, HADDAVE, 0x80);
 399
 400         reg_write(client, LANESEL, 0x00);
 401
 402         reg_write(client, GROUPED_PARAMETER_HOLD, 0x00);        /* off */
 403
 404         return 0;
 405 }
 406
 407 static int imx074_probe(struct i2c_client *client,
 408                         const struct i2c_device_id *did)
 409 {
 410         struct imx074 *priv;
 411         struct i2c_adapter *adapter = to_i2c_adapter(client->dev.parent);
 412         struct soc_camera_link *icl = soc_camera_i2c_to_link(client);
 413         int ret;
 414
 415         if (!icl) {
 416                 dev_err(&client->dev, "IMX074: missing platform data!\n");
 417                 return -EINVAL;
 418         }
 419
 420         if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) {
 421                 dev_warn(&adapter->dev,
 422                          "I2C-Adapter doesn't support I2C_FUNC_SMBUS_BYTE\n");
 423                 return -EIO;
 424         }
 425
 426         priv = kzalloc(sizeof(struct imx074), GFP_KERNEL);
 427         if (!priv)
 428                 return -ENOMEM;
 429
 430         v4l2_i2c_subdev_init(&priv->subdev, client, &imx074_subdev_ops);
 431
 432         priv->fmt       = &imx074_colour_fmts[0];
 433
 434         ret = imx074_video_probe(client);
 435         if (ret < 0) {
 436                 kfree(priv);
 437                 return ret;
 438         }
 439
 440         return ret;
 441 }
 442
 443 static int imx074_remove(struct i2c_client *client)
 444 {
 445         struct imx074 *priv = to_imx074(client);
 446         struct soc_camera_link *icl = soc_camera_i2c_to_link(client);
 447
 448         if (icl->free_bus)
 449                 icl->free_bus(icl);
 450         kfree(priv);
 451
 452         return 0;
 453 }
 454
 455 static const struct i2c_device_id imx074_id[] = {
 456         { "imx074", 0 },
 457         { }
 458 };
 459 MODULE_DEVICE_TABLE(i2c, imx074_id);
 460
 461 static struct i2c_driver imx074_i2c_driver = {
 462         .driver = {
 463                 .name = "imx074",
 464         },
 465         .probe          = imx074_probe,
 466         .remove         = imx074_remove,
 467         .id_table       = imx074_id,
 468 };
 469
 470 static int __init imx074_mod_init(void)
 471 {
 472         return i2c_add_driver(&imx074_i2c_driver);
 473 }
 474
 475 static void __exit imx074_mod_exit(void)
 476 {
 477         i2c_del_driver(&imx074_i2c_driver);
 478 }
 479
 480 module_init(imx074_mod_init);
 481 module_exit(imx074_mod_exit);
 482
 483 MODULE_DESCRIPTION("Sony IMX074 Camera driver");
 484 MODULE_AUTHOR("Guennadi Liakhovetski <g.liakhovetski@gmx.de>");
 485 MODULE_LICENSE("GPL v2");