drivers/media/i2c/smiapp/smiapp-core.c

   1 /*
   2  * drivers/media/i2c/smiapp/smiapp-core.c
   3  *
   4  * Generic driver for SMIA/SMIA++ compliant camera modules
   5  *
   6  * Copyright (C) 2010--2012 Nokia Corporation
   7  * Contact: Sakari Ailus <sakari.ailus@iki.fi>
   8  *
   9  * Based on smiapp driver by Vimarsh Zutshi
  10  * Based on jt8ev1.c by Vimarsh Zutshi
  11  * Based on smia-sensor.c by Tuukka Toivonen <tuukkat76@gmail.com>
  12  *
  13  * This program is free software; you can redistribute it and/or
  14  * modify it under the terms of the GNU General Public License
  15  * version 2 as published by the Free Software Foundation.
  16  *
  17  * This program is distributed in the hope that it will be useful, but
  18  * WITHOUT ANY WARRANTY; without even the implied warranty of
  19  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  20  * General Public License for more details.
  21  *
  22  * You should have received a copy of the GNU General Public License
  23  * along with this program; if not, write to the Free Software
  24  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
  25  * 02110-1301 USA
  26  *
  27  */
  28
  29 #include <linux/clk.h>
  30 #include <linux/delay.h>
  31 #include <linux/device.h>
  32 #include <linux/gpio.h>
  33 #include <linux/module.h>
  34 #include <linux/regulator/consumer.h>
  35 #include <linux/slab.h>
  36 #include <linux/smiapp.h>
  37 #include <linux/v4l2-mediabus.h>
  38 #include <media/v4l2-device.h>
  39
  40 #include "smiapp.h"
  41
  42 #define SMIAPP_ALIGN_DIM(dim, flags)    \
  43         ((flags) & V4L2_SEL_FLAG_GE     \
  44          ? ALIGN((dim), 2)              \
  45          : (dim) & ~1)
  46
  47 /*
  48  * smiapp_module_idents - supported camera modules
  49  */
  50 static const struct smiapp_module_ident smiapp_module_idents[] = {
  51         SMIAPP_IDENT_L(0x01, 0x022b, -1, "vs6555"),
  52         SMIAPP_IDENT_L(0x01, 0x022e, -1, "vw6558"),
  53         SMIAPP_IDENT_L(0x07, 0x7698, -1, "ovm7698"),
  54         SMIAPP_IDENT_L(0x0b, 0x4242, -1, "smiapp-003"),
  55         SMIAPP_IDENT_L(0x0c, 0x208a, -1, "tcm8330md"),
  56         SMIAPP_IDENT_LQ(0x0c, 0x2134, -1, "tcm8500md", &smiapp_tcm8500md_quirk),
  57         SMIAPP_IDENT_L(0x0c, 0x213e, -1, "et8en2"),
  58         SMIAPP_IDENT_L(0x0c, 0x2184, -1, "tcm8580md"),
  59         SMIAPP_IDENT_LQ(0x0c, 0x560f, -1, "jt8ew9", &smiapp_jt8ew9_quirk),
  60         SMIAPP_IDENT_LQ(0x10, 0x4141, -1, "jt8ev1", &smiapp_jt8ev1_quirk),
  61         SMIAPP_IDENT_LQ(0x10, 0x4241, -1, "imx125es", &smiapp_imx125es_quirk),
  62 };
  63
  64 /*
  65  *
  66  * Dynamic Capability Identification
  67  *
  68  */
  69
  70 static int smiapp_read_frame_fmt(struct smiapp_sensor *sensor)
  71 {
  72         struct i2c_client *client = v4l2_get_subdevdata(&sensor->src->sd);
  73         u32 fmt_model_type, fmt_model_subtype, ncol_desc, nrow_desc;
  74         unsigned int i;
  75         int rval;
  76         int line_count = 0;
  77         int embedded_start = -1, embedded_end = -1;
  78         int image_start = 0;
  79
  80         rval = smiapp_read(sensor, SMIAPP_REG_U8_FRAME_FORMAT_MODEL_TYPE,
  81                            &fmt_model_type);
  82         if (rval)
  83                 return rval;
  84
  85         rval = smiapp_read(sensor, SMIAPP_REG_U8_FRAME_FORMAT_MODEL_SUBTYPE,
  86                            &fmt_model_subtype);
  87         if (rval)
  88                 return rval;
  89
  90         ncol_desc = (fmt_model_subtype
  91                      & SMIAPP_FRAME_FORMAT_MODEL_SUBTYPE_NCOLS_MASK)
  92                 >> SMIAPP_FRAME_FORMAT_MODEL_SUBTYPE_NCOLS_SHIFT;
  93         nrow_desc = fmt_model_subtype
  94                 & SMIAPP_FRAME_FORMAT_MODEL_SUBTYPE_NROWS_MASK;
  95
  96         dev_dbg(&client->dev, "format_model_type %s\n",
  97                 fmt_model_type == SMIAPP_FRAME_FORMAT_MODEL_TYPE_2BYTE
  98                 ? "2 byte" :
  99                 fmt_model_type == SMIAPP_FRAME_FORMAT_MODEL_TYPE_4BYTE
 100                 ? "4 byte" : "is simply bad");
 101
 102         for (i = 0; i < ncol_desc + nrow_desc; i++) {
 103                 u32 desc;
 104                 u32 pixelcode;
 105                 u32 pixels;
 106                 char *which;
 107                 char *what;
 108
 109                 if (fmt_model_type == SMIAPP_FRAME_FORMAT_MODEL_TYPE_2BYTE) {
 110                         rval = smiapp_read(
 111                                 sensor,
 112                                 SMIAPP_REG_U16_FRAME_FORMAT_DESCRIPTOR_2(i),
 113                                 &desc);
 114                         if (rval)
 115                                 return rval;
 116
 117                         pixelcode =
 118                                 (desc
 119                                  & SMIAPP_FRAME_FORMAT_DESC_2_PIXELCODE_MASK)
 120                                 >> SMIAPP_FRAME_FORMAT_DESC_2_PIXELCODE_SHIFT;
 121                         pixels = desc & SMIAPP_FRAME_FORMAT_DESC_2_PIXELS_MASK;
 122                 } else if (fmt_model_type
 123                            == SMIAPP_FRAME_FORMAT_MODEL_TYPE_4BYTE) {
 124                         rval = smiapp_read(
 125                                 sensor,
 126                                 SMIAPP_REG_U32_FRAME_FORMAT_DESCRIPTOR_4(i),
 127                                 &desc);
 128                         if (rval)
 129                                 return rval;
 130
 131                         pixelcode =
 132                                 (desc
 133                                  & SMIAPP_FRAME_FORMAT_DESC_4_PIXELCODE_MASK)
 134                                 >> SMIAPP_FRAME_FORMAT_DESC_4_PIXELCODE_SHIFT;
 135                         pixels = desc & SMIAPP_FRAME_FORMAT_DESC_4_PIXELS_MASK;
 136                 } else {
 137                         dev_dbg(&client->dev,
 138                                 "invalid frame format model type %d\n",
 139                                 fmt_model_type);
 140                         return -EINVAL;
 141                 }
 142
 143                 if (i < ncol_desc)
 144                         which = "columns";
 145                 else
 146                         which = "rows";
 147
 148                 switch (pixelcode) {
 149                 case SMIAPP_FRAME_FORMAT_DESC_PIXELCODE_EMBEDDED:
 150                         what = "embedded";
 151                         break;
 152                 case SMIAPP_FRAME_FORMAT_DESC_PIXELCODE_DUMMY:
 153                         what = "dummy";
 154                         break;
 155                 case SMIAPP_FRAME_FORMAT_DESC_PIXELCODE_BLACK:
 156                         what = "black";
 157                         break;
 158                 case SMIAPP_FRAME_FORMAT_DESC_PIXELCODE_DARK:
 159                         what = "dark";
 160                         break;
 161                 case SMIAPP_FRAME_FORMAT_DESC_PIXELCODE_VISIBLE:
 162                         what = "visible";
 163                         break;
 164                 default:
 165                         what = "invalid";
 166                         dev_dbg(&client->dev, "pixelcode %d\n", pixelcode);
 167                         break;
 168                 }
 169
 170                 dev_dbg(&client->dev, "%s pixels: %d %s\n",
 171                         what, pixels, which);
 172
 173                 if (i < ncol_desc)
 174                         continue;
 175
 176                 /* Handle row descriptors */
 177                 if (pixelcode
 178                     == SMIAPP_FRAME_FORMAT_DESC_PIXELCODE_EMBEDDED) {
 179                         embedded_start = line_count;
 180                 } else {
 181                         if (pixelcode == SMIAPP_FRAME_FORMAT_DESC_PIXELCODE_VISIBLE
 182                             || pixels >= sensor->limits[SMIAPP_LIMIT_MIN_FRAME_LENGTH_LINES] / 2)
 183                                 image_start = line_count;
 184                         if (embedded_start != -1 && embedded_end == -1)
 185                                 embedded_end = line_count;
 186                 }
 187                 line_count += pixels;
 188         }
 189
 190         if (embedded_start == -1 || embedded_end == -1) {
 191                 embedded_start = 0;
 192                 embedded_end = 0;
 193         }
 194
 195         dev_dbg(&client->dev, "embedded data from lines %d to %d\n",
 196                 embedded_start, embedded_end);
 197         dev_dbg(&client->dev, "image data starts at line %d\n", image_start);
 198
 199         return 0;
 200 }
 201
 202 static int smiapp_pll_configure(struct smiapp_sensor *sensor)
 203 {
 204         struct smiapp_pll *pll = &sensor->pll;
 205         int rval;
 206
 207         rval = smiapp_write(
 208                 sensor, SMIAPP_REG_U16_VT_PIX_CLK_DIV, pll->vt_pix_clk_div);
 209         if (rval < 0)
 210                 return rval;
 211
 212         rval = smiapp_write(
 213                 sensor, SMIAPP_REG_U16_VT_SYS_CLK_DIV, pll->vt_sys_clk_div);
 214         if (rval < 0)
 215                 return rval;
 216
 217         rval = smiapp_write(
 218                 sensor, SMIAPP_REG_U16_PRE_PLL_CLK_DIV, pll->pre_pll_clk_div);
 219         if (rval < 0)
 220                 return rval;
 221
 222         rval = smiapp_write(
 223                 sensor, SMIAPP_REG_U16_PLL_MULTIPLIER, pll->pll_multiplier);
 224         if (rval < 0)
 225                 return rval;
 226
 227         /* Lane op clock ratio does not apply here. */
 228         rval = smiapp_write(
 229                 sensor, SMIAPP_REG_U32_REQUESTED_LINK_BIT_RATE_MBPS,
 230                 DIV_ROUND_UP(pll->op_sys_clk_freq_hz, 1000000 / 256 / 256));
 231         if (rval < 0 || sensor->minfo.smiapp_profile == SMIAPP_PROFILE_0)
 232                 return rval;
 233
 234         rval = smiapp_write(
 235                 sensor, SMIAPP_REG_U16_OP_PIX_CLK_DIV, pll->op_pix_clk_div);
 236         if (rval < 0)
 237                 return rval;
 238
 239         return smiapp_write(
 240                 sensor, SMIAPP_REG_U16_OP_SYS_CLK_DIV, pll->op_sys_clk_div);
 241 }
 242
 243 static int smiapp_pll_update(struct smiapp_sensor *sensor)
 244 {
 245         struct i2c_client *client = v4l2_get_subdevdata(&sensor->src->sd);
 246         struct smiapp_pll_limits lim = {
 247                 .min_pre_pll_clk_div = sensor->limits[SMIAPP_LIMIT_MIN_PRE_PLL_CLK_DIV],
 248                 .max_pre_pll_clk_div = sensor->limits[SMIAPP_LIMIT_MAX_PRE_PLL_CLK_DIV],
 249                 .min_pll_ip_freq_hz = sensor->limits[SMIAPP_LIMIT_MIN_PLL_IP_FREQ_HZ],
 250                 .max_pll_ip_freq_hz = sensor->limits[SMIAPP_LIMIT_MAX_PLL_IP_FREQ_HZ],
 251                 .min_pll_multiplier = sensor->limits[SMIAPP_LIMIT_MIN_PLL_MULTIPLIER],
 252                 .max_pll_multiplier = sensor->limits[SMIAPP_LIMIT_MAX_PLL_MULTIPLIER],
 253                 .min_pll_op_freq_hz = sensor->limits[SMIAPP_LIMIT_MIN_PLL_OP_FREQ_HZ],
 254                 .max_pll_op_freq_hz = sensor->limits[SMIAPP_LIMIT_MAX_PLL_OP_FREQ_HZ],
 255
 256                 .op.min_sys_clk_div = sensor->limits[SMIAPP_LIMIT_MIN_OP_SYS_CLK_DIV],
 257                 .op.max_sys_clk_div = sensor->limits[SMIAPP_LIMIT_MAX_OP_SYS_CLK_DIV],
 258                 .op.min_pix_clk_div = sensor->limits[SMIAPP_LIMIT_MIN_OP_PIX_CLK_DIV],
 259                 .op.max_pix_clk_div = sensor->limits[SMIAPP_LIMIT_MAX_OP_PIX_CLK_DIV],
 260                 .op.min_sys_clk_freq_hz = sensor->limits[SMIAPP_LIMIT_MIN_OP_SYS_CLK_FREQ_HZ],
 261                 .op.max_sys_clk_freq_hz = sensor->limits[SMIAPP_LIMIT_MAX_OP_SYS_CLK_FREQ_HZ],
 262                 .op.min_pix_clk_freq_hz = sensor->limits[SMIAPP_LIMIT_MIN_OP_PIX_CLK_FREQ_HZ],
 263                 .op.max_pix_clk_freq_hz = sensor->limits[SMIAPP_LIMIT_MAX_OP_PIX_CLK_FREQ_HZ],
 264
 265                 .vt.min_sys_clk_div = sensor->limits[SMIAPP_LIMIT_MIN_VT_SYS_CLK_DIV],
 266                 .vt.max_sys_clk_div = sensor->limits[SMIAPP_LIMIT_MAX_VT_SYS_CLK_DIV],
 267                 .vt.min_pix_clk_div = sensor->limits[SMIAPP_LIMIT_MIN_VT_PIX_CLK_DIV],
 268                 .vt.max_pix_clk_div = sensor->limits[SMIAPP_LIMIT_MAX_VT_PIX_CLK_DIV],
 269                 .vt.min_sys_clk_freq_hz = sensor->limits[SMIAPP_LIMIT_MIN_VT_SYS_CLK_FREQ_HZ],
 270                 .vt.max_sys_clk_freq_hz = sensor->limits[SMIAPP_LIMIT_MAX_VT_SYS_CLK_FREQ_HZ],
 271                 .vt.min_pix_clk_freq_hz = sensor->limits[SMIAPP_LIMIT_MIN_VT_PIX_CLK_FREQ_HZ],
 272                 .vt.max_pix_clk_freq_hz = sensor->limits[SMIAPP_LIMIT_MAX_VT_PIX_CLK_FREQ_HZ],
 273
 274                 .min_line_length_pck_bin = sensor->limits[SMIAPP_LIMIT_MIN_LINE_LENGTH_PCK_BIN],
 275                 .min_line_length_pck = sensor->limits[SMIAPP_LIMIT_MIN_LINE_LENGTH_PCK],
 276         };
 277         struct smiapp_pll *pll = &sensor->pll;
 278         int rval;
 279
 280         if (sensor->minfo.smiapp_profile == SMIAPP_PROFILE_0) {
 281                 /*
 282                  * Fill in operational clock divisors limits from the
 283                  * video timing ones. On profile 0 sensors the
 284                  * requirements regarding them are essentially the
 285                  * same as on VT ones.
 286                  */
 287                 lim.op = lim.vt;
 288         }
 289
 290         pll->binning_horizontal = sensor->binning_horizontal;
 291         pll->binning_vertical = sensor->binning_vertical;
 292         pll->link_freq =
 293                 sensor->link_freq->qmenu_int[sensor->link_freq->val];
 294         pll->scale_m = sensor->scale_m;
 295         pll->bits_per_pixel = sensor->csi_format->compressed;
 296
 297         rval = smiapp_pll_calculate(&client->dev, &lim, pll);
 298         if (rval < 0)
 299                 return rval;
 300
 301         __v4l2_ctrl_s_ctrl_int64(sensor->pixel_rate_parray,
 302                                  pll->vt_pix_clk_freq_hz);
 303         __v4l2_ctrl_s_ctrl_int64(sensor->pixel_rate_csi, pll->pixel_rate_csi);
 304
 305         return 0;
 306 }
 307
 308
 309 /*
 310  *
 311  * V4L2 Controls handling
 312  *
 313  */
 314
 315 static void __smiapp_update_exposure_limits(struct smiapp_sensor *sensor)
 316 {
 317         struct v4l2_ctrl *ctrl = sensor->exposure;
 318         int max;
 319
 320         max = sensor->pixel_array->crop[SMIAPP_PA_PAD_SRC].height
 321                 + sensor->vblank->val
 322                 - sensor->limits[SMIAPP_LIMIT_COARSE_INTEGRATION_TIME_MAX_MARGIN];
 323
 324         __v4l2_ctrl_modify_range(ctrl, ctrl->minimum, max, ctrl->step, max);
 325 }
 326
 327 /*
 328  * Order matters.
 329  *
 330  * 1. Bits-per-pixel, descending.
 331  * 2. Bits-per-pixel compressed, descending.
 332  * 3. Pixel order, same as in pixel_order_str. Formats for all four pixel
 333  *    orders must be defined.
 334  */
 335 static const struct smiapp_csi_data_format smiapp_csi_data_formats[] = {
 336         { V4L2_MBUS_FMT_SGRBG12_1X12, 12, 12, SMIAPP_PIXEL_ORDER_GRBG, },
 337         { V4L2_MBUS_FMT_SRGGB12_1X12, 12, 12, SMIAPP_PIXEL_ORDER_RGGB, },
 338         { V4L2_MBUS_FMT_SBGGR12_1X12, 12, 12, SMIAPP_PIXEL_ORDER_BGGR, },
 339         { V4L2_MBUS_FMT_SGBRG12_1X12, 12, 12, SMIAPP_PIXEL_ORDER_GBRG, },
 340         { V4L2_MBUS_FMT_SGRBG10_1X10, 10, 10, SMIAPP_PIXEL_ORDER_GRBG, },
 341         { V4L2_MBUS_FMT_SRGGB10_1X10, 10, 10, SMIAPP_PIXEL_ORDER_RGGB, },
 342         { V4L2_MBUS_FMT_SBGGR10_1X10, 10, 10, SMIAPP_PIXEL_ORDER_BGGR, },
 343         { V4L2_MBUS_FMT_SGBRG10_1X10, 10, 10, SMIAPP_PIXEL_ORDER_GBRG, },
 344         { V4L2_MBUS_FMT_SGRBG10_DPCM8_1X8, 10, 8, SMIAPP_PIXEL_ORDER_GRBG, },
 345         { V4L2_MBUS_FMT_SRGGB10_DPCM8_1X8, 10, 8, SMIAPP_PIXEL_ORDER_RGGB, },
 346         { V4L2_MBUS_FMT_SBGGR10_DPCM8_1X8, 10, 8, SMIAPP_PIXEL_ORDER_BGGR, },
 347         { V4L2_MBUS_FMT_SGBRG10_DPCM8_1X8, 10, 8, SMIAPP_PIXEL_ORDER_GBRG, },
 348         { V4L2_MBUS_FMT_SGRBG8_1X8, 8, 8, SMIAPP_PIXEL_ORDER_GRBG, },
 349         { V4L2_MBUS_FMT_SRGGB8_1X8, 8, 8, SMIAPP_PIXEL_ORDER_RGGB, },
 350         { V4L2_MBUS_FMT_SBGGR8_1X8, 8, 8, SMIAPP_PIXEL_ORDER_BGGR, },
 351         { V4L2_MBUS_FMT_SGBRG8_1X8, 8, 8, SMIAPP_PIXEL_ORDER_GBRG, },
 352 };
 353
 354 const char *pixel_order_str[] = { "GRBG", "RGGB", "BGGR", "GBRG" };
 355
 356 #define to_csi_format_idx(fmt) (((unsigned long)(fmt)                   \
 357                                  - (unsigned long)smiapp_csi_data_formats) \
 358                                 / sizeof(*smiapp_csi_data_formats))
 359
 360 static u32 smiapp_pixel_order(struct smiapp_sensor *sensor)
 361 {
 362         struct i2c_client *client = v4l2_get_subdevdata(&sensor->src->sd);
 363         int flip = 0;
 364
 365         if (sensor->hflip) {
 366                 if (sensor->hflip->val)
 367                         flip |= SMIAPP_IMAGE_ORIENTATION_HFLIP;
 368
 369                 if (sensor->vflip->val)
 370                         flip |= SMIAPP_IMAGE_ORIENTATION_VFLIP;
 371         }
 372
 373         flip ^= sensor->hvflip_inv_mask;
 374
 375         dev_dbg(&client->dev, "flip %d\n", flip);
 376         return sensor->default_pixel_order ^ flip;
 377 }
 378
 379 static void smiapp_update_mbus_formats(struct smiapp_sensor *sensor)
 380 {
 381         struct i2c_client *client = v4l2_get_subdevdata(&sensor->src->sd);
 382         unsigned int csi_format_idx =
 383                 to_csi_format_idx(sensor->csi_format) & ~3;
 384         unsigned int internal_csi_format_idx =
 385                 to_csi_format_idx(sensor->internal_csi_format) & ~3;
 386         unsigned int pixel_order = smiapp_pixel_order(sensor);
 387
 388         sensor->mbus_frame_fmts =
 389                 sensor->default_mbus_frame_fmts << pixel_order;
 390         sensor->csi_format =
 391                 &smiapp_csi_data_formats[csi_format_idx + pixel_order];
 392         sensor->internal_csi_format =
 393                 &smiapp_csi_data_formats[internal_csi_format_idx
 394                                          + pixel_order];
 395
 396         BUG_ON(max(internal_csi_format_idx, csi_format_idx) + pixel_order
 397                >= ARRAY_SIZE(smiapp_csi_data_formats));
 398
 399         dev_dbg(&client->dev, "new pixel order %s\n",
 400                 pixel_order_str[pixel_order]);
 401 }
 402
 403 static const char * const smiapp_test_patterns[] = {
 404         "Disabled",
 405         "Solid Colour",
 406         "Eight Vertical Colour Bars",
 407         "Colour Bars With Fade to Grey",
 408         "Pseudorandom Sequence (PN9)",
 409 };
 410
 411 static int smiapp_set_ctrl(struct v4l2_ctrl *ctrl)
 412 {
 413         struct smiapp_sensor *sensor =
 414                 container_of(ctrl->handler, struct smiapp_subdev, ctrl_handler)
 415                         ->sensor;
 416         u32 orient = 0;
 417         int exposure;
 418         int rval;
 419
 420         switch (ctrl->id) {
 421         case V4L2_CID_ANALOGUE_GAIN:
 422                 return smiapp_write(
 423                         sensor,
 424                         SMIAPP_REG_U16_ANALOGUE_GAIN_CODE_GLOBAL, ctrl->val);
 425
 426         case V4L2_CID_EXPOSURE:
 427                 return smiapp_write(
 428                         sensor,
 429                         SMIAPP_REG_U16_COARSE_INTEGRATION_TIME, ctrl->val);
 430
 431         case V4L2_CID_HFLIP:
 432         case V4L2_CID_VFLIP:
 433                 if (sensor->streaming)
 434                         return -EBUSY;
 435
 436                 if (sensor->hflip->val)
 437                         orient |= SMIAPP_IMAGE_ORIENTATION_HFLIP;
 438
 439                 if (sensor->vflip->val)
 440                         orient |= SMIAPP_IMAGE_ORIENTATION_VFLIP;
 441
 442                 orient ^= sensor->hvflip_inv_mask;
 443                 rval = smiapp_write(sensor,
 444                                     SMIAPP_REG_U8_IMAGE_ORIENTATION,
 445                                     orient);
 446                 if (rval < 0)
 447                         return rval;
 448
 449                 smiapp_update_mbus_formats(sensor);
 450
 451                 return 0;
 452
 453         case V4L2_CID_VBLANK:
 454                 exposure = sensor->exposure->val;
 455
 456                 __smiapp_update_exposure_limits(sensor);
 457
 458                 if (exposure > sensor->exposure->maximum) {
 459                         sensor->exposure->val =
 460                                 sensor->exposure->maximum;
 461                         rval = smiapp_set_ctrl(
 462                                 sensor->exposure);
 463                         if (rval < 0)
 464                                 return rval;
 465                 }
 466
 467                 return smiapp_write(
 468                         sensor, SMIAPP_REG_U16_FRAME_LENGTH_LINES,
 469                         sensor->pixel_array->crop[SMIAPP_PA_PAD_SRC].height
 470                         + ctrl->val);
 471
 472         case V4L2_CID_HBLANK:
 473                 return smiapp_write(
 474                         sensor, SMIAPP_REG_U16_LINE_LENGTH_PCK,
 475                         sensor->pixel_array->crop[SMIAPP_PA_PAD_SRC].width
 476                         + ctrl->val);
 477
 478         case V4L2_CID_LINK_FREQ:
 479                 if (sensor->streaming)
 480                         return -EBUSY;
 481
 482                 return smiapp_pll_update(sensor);
 483
 484         case V4L2_CID_TEST_PATTERN: {
 485                 unsigned int i;
 486
 487                 for (i = 0; i < ARRAY_SIZE(sensor->test_data); i++)
 488                         v4l2_ctrl_activate(
 489                                 sensor->test_data[i],
 490                                 ctrl->val ==
 491                                 V4L2_SMIAPP_TEST_PATTERN_MODE_SOLID_COLOUR);
 492
 493                 return smiapp_write(
 494                         sensor, SMIAPP_REG_U16_TEST_PATTERN_MODE, ctrl->val);
 495         }
 496
 497         case V4L2_CID_TEST_PATTERN_RED:
 498                 return smiapp_write(
 499                         sensor, SMIAPP_REG_U16_TEST_DATA_RED, ctrl->val);
 500
 501         case V4L2_CID_TEST_PATTERN_GREENR:
 502                 return smiapp_write(
 503                         sensor, SMIAPP_REG_U16_TEST_DATA_GREENR, ctrl->val);
 504
 505         case V4L2_CID_TEST_PATTERN_BLUE:
 506                 return smiapp_write(
 507                         sensor, SMIAPP_REG_U16_TEST_DATA_BLUE, ctrl->val);
 508
 509         case V4L2_CID_TEST_PATTERN_GREENB:
 510                 return smiapp_write(
 511                         sensor, SMIAPP_REG_U16_TEST_DATA_GREENB, ctrl->val);
 512
 513         case V4L2_CID_PIXEL_RATE:
 514                 /* For v4l2_ctrl_s_ctrl_int64() used internally. */
 515                 return 0;
 516
 517         default:
 518                 return -EINVAL;
 519         }
 520 }
 521
 522 static const struct v4l2_ctrl_ops smiapp_ctrl_ops = {
 523         .s_ctrl = smiapp_set_ctrl,
 524 };
 525
 526 static int smiapp_init_controls(struct smiapp_sensor *sensor)
 527 {
 528         struct i2c_client *client = v4l2_get_subdevdata(&sensor->src->sd);
 529         unsigned int max, i;
 530         int rval;
 531
 532         rval = v4l2_ctrl_handler_init(&sensor->pixel_array->ctrl_handler, 12);
 533         if (rval)
 534                 return rval;
 535         sensor->pixel_array->ctrl_handler.lock = &sensor->mutex;
 536
 537         sensor->analog_gain = v4l2_ctrl_new_std(
 538                 &sensor->pixel_array->ctrl_handler, &smiapp_ctrl_ops,
 539                 V4L2_CID_ANALOGUE_GAIN,
 540                 sensor->limits[SMIAPP_LIMIT_ANALOGUE_GAIN_CODE_MIN],
 541                 sensor->limits[SMIAPP_LIMIT_ANALOGUE_GAIN_CODE_MAX],
 542                 max(sensor->limits[SMIAPP_LIMIT_ANALOGUE_GAIN_CODE_STEP], 1U),
 543                 sensor->limits[SMIAPP_LIMIT_ANALOGUE_GAIN_CODE_MIN]);
 544
 545         /* Exposure limits will be updated soon, use just something here. */
 546         sensor->exposure = v4l2_ctrl_new_std(
 547                 &sensor->pixel_array->ctrl_handler, &smiapp_ctrl_ops,
 548                 V4L2_CID_EXPOSURE, 0, 0, 1, 0);
 549
 550         sensor->hflip = v4l2_ctrl_new_std(
 551                 &sensor->pixel_array->ctrl_handler, &smiapp_ctrl_ops,
 552                 V4L2_CID_HFLIP, 0, 1, 1, 0);
 553         sensor->vflip = v4l2_ctrl_new_std(
 554                 &sensor->pixel_array->ctrl_handler, &smiapp_ctrl_ops,
 555                 V4L2_CID_VFLIP, 0, 1, 1, 0);
 556
 557         sensor->vblank = v4l2_ctrl_new_std(
 558                 &sensor->pixel_array->ctrl_handler, &smiapp_ctrl_ops,
 559                 V4L2_CID_VBLANK, 0, 1, 1, 0);
 560
 561         if (sensor->vblank)
 562                 sensor->vblank->flags |= V4L2_CTRL_FLAG_UPDATE;
 563
 564         sensor->hblank = v4l2_ctrl_new_std(
 565                 &sensor->pixel_array->ctrl_handler, &smiapp_ctrl_ops,
 566                 V4L2_CID_HBLANK, 0, 1, 1, 0);
 567
 568         if (sensor->hblank)
 569                 sensor->hblank->flags |= V4L2_CTRL_FLAG_UPDATE;
 570
 571         sensor->pixel_rate_parray = v4l2_ctrl_new_std(
 572                 &sensor->pixel_array->ctrl_handler, &smiapp_ctrl_ops,
 573                 V4L2_CID_PIXEL_RATE, 1, INT_MAX, 1, 1);
 574
 575         v4l2_ctrl_new_std_menu_items(&sensor->pixel_array->ctrl_handler,
 576                                      &smiapp_ctrl_ops, V4L2_CID_TEST_PATTERN,
 577                                      ARRAY_SIZE(smiapp_test_patterns) - 1,
 578                                      0, 0, smiapp_test_patterns);
 579
 580         for (i = 0; i < ARRAY_SIZE(sensor->test_data); i++) {
 581                 int max_value = (1 << sensor->csi_format->width) - 1;
 582                 sensor->test_data[i] =
 583                         v4l2_ctrl_new_std(
 584                                 &sensor->pixel_array->ctrl_handler,
 585                                 &smiapp_ctrl_ops, V4L2_CID_TEST_PATTERN_RED + i,
 586                                 0, max_value, 1, max_value);
 587         }
 588
 589         if (sensor->pixel_array->ctrl_handler.error) {
 590                 dev_err(&client->dev,
 591                         "pixel array controls initialization failed (%d)\n",
 592                         sensor->pixel_array->ctrl_handler.error);
 593                 rval = sensor->pixel_array->ctrl_handler.error;
 594                 goto error;
 595         }
 596
 597         sensor->pixel_array->sd.ctrl_handler =
 598                 &sensor->pixel_array->ctrl_handler;
 599
 600         v4l2_ctrl_cluster(2, &sensor->hflip);
 601
 602         rval = v4l2_ctrl_handler_init(&sensor->src->ctrl_handler, 0);
 603         if (rval)
 604                 goto error;
 605         sensor->src->ctrl_handler.lock = &sensor->mutex;
 606
 607         for (max = 0; sensor->platform_data->op_sys_clock[max + 1]; max++);
 608
 609         sensor->link_freq = v4l2_ctrl_new_int_menu(
 610                 &sensor->src->ctrl_handler, &smiapp_ctrl_ops,
 611                 V4L2_CID_LINK_FREQ, max, 0,
 612                 sensor->platform_data->op_sys_clock);
 613
 614         sensor->pixel_rate_csi = v4l2_ctrl_new_std(
 615                 &sensor->src->ctrl_handler, &smiapp_ctrl_ops,
 616                 V4L2_CID_PIXEL_RATE, 1, INT_MAX, 1, 1);
 617
 618         if (sensor->src->ctrl_handler.error) {
 619                 dev_err(&client->dev,
 620                         "src controls initialization failed (%d)\n",
 621                         sensor->src->ctrl_handler.error);
 622                 rval = sensor->src->ctrl_handler.error;
 623                 goto error;
 624         }
 625
 626         sensor->src->sd.ctrl_handler =
 627                 &sensor->src->ctrl_handler;
 628
 629         return 0;
 630
 631 error:
 632         v4l2_ctrl_handler_free(&sensor->pixel_array->ctrl_handler);
 633         v4l2_ctrl_handler_free(&sensor->src->ctrl_handler);
 634
 635         return rval;
 636 }
 637
 638 static void smiapp_free_controls(struct smiapp_sensor *sensor)
 639 {
 640         unsigned int i;
 641
 642         for (i = 0; i < sensor->ssds_used; i++)
 643                 v4l2_ctrl_handler_free(&sensor->ssds[i].ctrl_handler);
 644 }
 645
 646 static int smiapp_get_limits(struct smiapp_sensor *sensor, int const *limit,
 647                              unsigned int n)
 648 {
 649         struct i2c_client *client = v4l2_get_subdevdata(&sensor->src->sd);
 650         unsigned int i;
 651         u32 val;
 652         int rval;
 653
 654         for (i = 0; i < n; i++) {
 655                 rval = smiapp_read(
 656                         sensor, smiapp_reg_limits[limit[i]].addr, &val);
 657                 if (rval)
 658                         return rval;
 659                 sensor->limits[limit[i]] = val;
 660                 dev_dbg(&client->dev, "0x%8.8x \"%s\" = %u, 0x%x\n",
 661                         smiapp_reg_limits[limit[i]].addr,
 662                         smiapp_reg_limits[limit[i]].what, val, val);
 663         }
 664
 665         return 0;
 666 }
 667
 668 static int smiapp_get_all_limits(struct smiapp_sensor *sensor)
 669 {
 670         unsigned int i;
 671         int rval;
 672
 673         for (i = 0; i < SMIAPP_LIMIT_LAST; i++) {
 674                 rval = smiapp_get_limits(sensor, &i, 1);
 675                 if (rval < 0)
 676                         return rval;
 677         }
 678
 679         if (sensor->limits[SMIAPP_LIMIT_SCALER_N_MIN] == 0)
 680                 smiapp_replace_limit(sensor, SMIAPP_LIMIT_SCALER_N_MIN, 16);
 681
 682         return 0;
 683 }
 684
 685 static int smiapp_get_limits_binning(struct smiapp_sensor *sensor)
 686 {
 687         struct i2c_client *client = v4l2_get_subdevdata(&sensor->src->sd);
 688         static u32 const limits[] = {
 689                 SMIAPP_LIMIT_MIN_FRAME_LENGTH_LINES_BIN,
 690                 SMIAPP_LIMIT_MAX_FRAME_LENGTH_LINES_BIN,
 691                 SMIAPP_LIMIT_MIN_LINE_LENGTH_PCK_BIN,
 692                 SMIAPP_LIMIT_MAX_LINE_LENGTH_PCK_BIN,
 693                 SMIAPP_LIMIT_MIN_LINE_BLANKING_PCK_BIN,
 694                 SMIAPP_LIMIT_FINE_INTEGRATION_TIME_MIN_BIN,
 695                 SMIAPP_LIMIT_FINE_INTEGRATION_TIME_MAX_MARGIN_BIN,
 696         };
 697         static u32 const limits_replace[] = {
 698                 SMIAPP_LIMIT_MIN_FRAME_LENGTH_LINES,
 699                 SMIAPP_LIMIT_MAX_FRAME_LENGTH_LINES,
 700                 SMIAPP_LIMIT_MIN_LINE_LENGTH_PCK,
 701                 SMIAPP_LIMIT_MAX_LINE_LENGTH_PCK,
 702                 SMIAPP_LIMIT_MIN_LINE_BLANKING_PCK,
 703                 SMIAPP_LIMIT_FINE_INTEGRATION_TIME_MIN,
 704                 SMIAPP_LIMIT_FINE_INTEGRATION_TIME_MAX_MARGIN,
 705         };
 706         unsigned int i;
 707         int rval;
 708
 709         if (sensor->limits[SMIAPP_LIMIT_BINNING_CAPABILITY] ==
 710             SMIAPP_BINNING_CAPABILITY_NO) {
 711                 for (i = 0; i < ARRAY_SIZE(limits); i++)
 712                         sensor->limits[limits[i]] =
 713                                 sensor->limits[limits_replace[i]];
 714
 715                 return 0;
 716         }
 717
 718         rval = smiapp_get_limits(sensor, limits, ARRAY_SIZE(limits));
 719         if (rval < 0)
 720                 return rval;
 721
 722         /*
 723          * Sanity check whether the binning limits are valid. If not,
 724          * use the non-binning ones.
 725          */
 726         if (sensor->limits[SMIAPP_LIMIT_MIN_FRAME_LENGTH_LINES_BIN]
 727             && sensor->limits[SMIAPP_LIMIT_MIN_LINE_LENGTH_PCK_BIN]
 728             && sensor->limits[SMIAPP_LIMIT_MIN_LINE_BLANKING_PCK_BIN])
 729                 return 0;
 730
 731         for (i = 0; i < ARRAY_SIZE(limits); i++) {
 732                 dev_dbg(&client->dev,
 733                         "replace limit 0x%8.8x \"%s\" = %d, 0x%x\n",
 734                         smiapp_reg_limits[limits[i]].addr,
 735                         smiapp_reg_limits[limits[i]].what,
 736                         sensor->limits[limits_replace[i]],
 737                         sensor->limits[limits_replace[i]]);
 738                 sensor->limits[limits[i]] =
 739                         sensor->limits[limits_replace[i]];
 740         }
 741
 742         return 0;
 743 }
 744
 745 static int smiapp_get_mbus_formats(struct smiapp_sensor *sensor)
 746 {
 747         struct i2c_client *client = v4l2_get_subdevdata(&sensor->src->sd);
 748         unsigned int type, n;
 749         unsigned int i, pixel_order;
 750         int rval;
 751
 752         rval = smiapp_read(
 753                 sensor, SMIAPP_REG_U8_DATA_FORMAT_MODEL_TYPE, &type);
 754         if (rval)
 755                 return rval;
 756
 757         dev_dbg(&client->dev, "data_format_model_type %d\n", type);
 758
 759         rval = smiapp_read(sensor, SMIAPP_REG_U8_PIXEL_ORDER,
 760                            &pixel_order);
 761         if (rval)
 762                 return rval;
 763
 764         if (pixel_order >= ARRAY_SIZE(pixel_order_str)) {
 765                 dev_dbg(&client->dev, "bad pixel order %d\n", pixel_order);
 766                 return -EINVAL;
 767         }
 768
 769         dev_dbg(&client->dev, "pixel order %d (%s)\n", pixel_order,
 770                 pixel_order_str[pixel_order]);
 771
 772         switch (type) {
 773         case SMIAPP_DATA_FORMAT_MODEL_TYPE_NORMAL:
 774                 n = SMIAPP_DATA_FORMAT_MODEL_TYPE_NORMAL_N;
 775                 break;
 776         case SMIAPP_DATA_FORMAT_MODEL_TYPE_EXTENDED:
 777                 n = SMIAPP_DATA_FORMAT_MODEL_TYPE_EXTENDED_N;
 778                 break;
 779         default:
 780                 return -EINVAL;
 781         }
 782
 783         sensor->default_pixel_order = pixel_order;
 784         sensor->mbus_frame_fmts = 0;
 785
 786         for (i = 0; i < n; i++) {
 787                 unsigned int fmt, j;
 788
 789                 rval = smiapp_read(
 790                         sensor,
 791                         SMIAPP_REG_U16_DATA_FORMAT_DESCRIPTOR(i), &fmt);
 792                 if (rval)
 793                         return rval;
 794
 795                 dev_dbg(&client->dev, "%u: bpp %u, compressed %u\n",
 796                         i, fmt >> 8, (u8)fmt);
 797
 798                 for (j = 0; j < ARRAY_SIZE(smiapp_csi_data_formats); j++) {
 799                         const struct smiapp_csi_data_format *f =
 800                                 &smiapp_csi_data_formats[j];
 801
 802                         if (f->pixel_order != SMIAPP_PIXEL_ORDER_GRBG)
 803                                 continue;
 804
 805                         if (f->width != fmt >> 8 || f->compressed != (u8)fmt)
 806                                 continue;
 807
 808                         dev_dbg(&client->dev, "jolly good! %d\n", j);
 809
 810                         sensor->default_mbus_frame_fmts |= 1 << j;
 811                         if (!sensor->csi_format
 812                             || f->width > sensor->csi_format->width
 813                             || (f->width == sensor->csi_format->width
 814                                 && f->compressed
 815                                 > sensor->csi_format->compressed)) {
 816                                 sensor->csi_format = f;
 817                                 sensor->internal_csi_format = f;
 818                         }
 819                 }
 820         }
 821
 822         if (!sensor->csi_format) {
 823                 dev_err(&client->dev, "no supported mbus code found\n");
 824                 return -EINVAL;
 825         }
 826
 827         smiapp_update_mbus_formats(sensor);
 828
 829         return 0;
 830 }
 831
 832 static void smiapp_update_blanking(struct smiapp_sensor *sensor)
 833 {
 834         struct v4l2_ctrl *vblank = sensor->vblank;
 835         struct v4l2_ctrl *hblank = sensor->hblank;
 836         int min, max;
 837
 838         min = max_t(int,
 839                     sensor->limits[SMIAPP_LIMIT_MIN_FRAME_BLANKING_LINES],
 840                     sensor->limits[SMIAPP_LIMIT_MIN_FRAME_LENGTH_LINES_BIN] -
 841                     sensor->pixel_array->crop[SMIAPP_PA_PAD_SRC].height);
 842         max = sensor->limits[SMIAPP_LIMIT_MAX_FRAME_LENGTH_LINES_BIN] -
 843                 sensor->pixel_array->crop[SMIAPP_PA_PAD_SRC].height;
 844
 845         __v4l2_ctrl_modify_range(vblank, min, max, vblank->step, min);
 846
 847         min = max_t(int,
 848                     sensor->limits[SMIAPP_LIMIT_MIN_LINE_LENGTH_PCK_BIN] -
 849                     sensor->pixel_array->crop[SMIAPP_PA_PAD_SRC].width,
 850                     sensor->limits[SMIAPP_LIMIT_MIN_LINE_BLANKING_PCK_BIN]);
 851         max = sensor->limits[SMIAPP_LIMIT_MAX_LINE_LENGTH_PCK_BIN] -
 852                 sensor->pixel_array->crop[SMIAPP_PA_PAD_SRC].width;
 853
 854         __v4l2_ctrl_modify_range(hblank, min, max, hblank->step, min);
 855
 856         __smiapp_update_exposure_limits(sensor);
 857 }
 858
 859 static int smiapp_update_mode(struct smiapp_sensor *sensor)
 860 {
 861         struct i2c_client *client = v4l2_get_subdevdata(&sensor->src->sd);
 862         unsigned int binning_mode;
 863         int rval;
 864
 865         dev_dbg(&client->dev, "frame size: %dx%d\n",
 866                 sensor->src->crop[SMIAPP_PAD_SRC].width,
 867                 sensor->src->crop[SMIAPP_PAD_SRC].height);
 868         dev_dbg(&client->dev, "csi format width: %d\n",
 869                 sensor->csi_format->width);
 870
 871         /* Binning has to be set up here; it affects limits */
 872         if (sensor->binning_horizontal == 1 &&
 873             sensor->binning_vertical == 1) {
 874                 binning_mode = 0;
 875         } else {
 876                 u8 binning_type =
 877                         (sensor->binning_horizontal << 4)
 878                         | sensor->binning_vertical;
 879
 880                 rval = smiapp_write(
 881                         sensor, SMIAPP_REG_U8_BINNING_TYPE, binning_type);
 882                 if (rval < 0)
 883                         return rval;
 884
 885                 binning_mode = 1;
 886         }
 887         rval = smiapp_write(sensor, SMIAPP_REG_U8_BINNING_MODE, binning_mode);
 888         if (rval < 0)
 889                 return rval;
 890
 891         /* Get updated limits due to binning */
 892         rval = smiapp_get_limits_binning(sensor);
 893         if (rval < 0)
 894                 return rval;
 895
 896         rval = smiapp_pll_update(sensor);
 897         if (rval < 0)
 898                 return rval;
 899
 900         /* Output from pixel array, including blanking */
 901         smiapp_update_blanking(sensor);
 902
 903         dev_dbg(&client->dev, "vblank\t\t%d\n", sensor->vblank->val);
 904         dev_dbg(&client->dev, "hblank\t\t%d\n", sensor->hblank->val);
 905
 906         dev_dbg(&client->dev, "real timeperframe\t100/%d\n",
 907                 sensor->pll.vt_pix_clk_freq_hz /
 908                 ((sensor->pixel_array->crop[SMIAPP_PA_PAD_SRC].width
 909                   + sensor->hblank->val) *
 910                  (sensor->pixel_array->crop[SMIAPP_PA_PAD_SRC].height
 911                   + sensor->vblank->val) / 100));
 912
 913         return 0;
 914 }
 915
 916 /*
 917  *
 918  * SMIA++ NVM handling
 919  *
 920  */
 921 static int smiapp_read_nvm(struct smiapp_sensor *sensor,
 922                            unsigned char *nvm)
 923 {
 924         u32 i, s, p, np, v;
 925         int rval = 0, rval2;
 926
 927         np = sensor->nvm_size / SMIAPP_NVM_PAGE_SIZE;
 928         for (p = 0; p < np; p++) {
 929                 rval = smiapp_write(
 930                         sensor,
 931                         SMIAPP_REG_U8_DATA_TRANSFER_IF_1_PAGE_SELECT, p);
 932                 if (rval)
 933                         goto out;
 934
 935                 rval = smiapp_write(sensor,
 936                                     SMIAPP_REG_U8_DATA_TRANSFER_IF_1_CTRL,
 937                                     SMIAPP_DATA_TRANSFER_IF_1_CTRL_EN |
 938                                     SMIAPP_DATA_TRANSFER_IF_1_CTRL_RD_EN);
 939                 if (rval)
 940                         goto out;
 941
 942                 for (i = 0; i < 1000; i++) {
 943                         rval = smiapp_read(
 944                                 sensor,
 945                                 SMIAPP_REG_U8_DATA_TRANSFER_IF_1_STATUS, &s);
 946
 947                         if (rval)
 948                                 goto out;
 949
 950                         if (s & SMIAPP_DATA_TRANSFER_IF_1_STATUS_RD_READY)
 951                                 break;
 952
 953                         if (--i == 0) {
 954                                 rval = -ETIMEDOUT;
 955                                 goto out;
 956                         }
 957
 958                 }
 959
 960                 for (i = 0; i < SMIAPP_NVM_PAGE_SIZE; i++) {
 961                         rval = smiapp_read(
 962                                 sensor,
 963                                 SMIAPP_REG_U8_DATA_TRANSFER_IF_1_DATA_0 + i,
 964                                 &v);
 965                         if (rval)
 966                                 goto out;
 967
 968                         *nvm++ = v;
 969                 }
 970         }
 971
 972 out:
 973         rval2 = smiapp_write(sensor, SMIAPP_REG_U8_DATA_TRANSFER_IF_1_CTRL, 0);
 974         if (rval < 0)
 975                 return rval;
 976         else
 977                 return rval2;
 978 }
 979
 980 /*
 981  *
 982  * SMIA++ CCI address control
 983  *
 984  */
 985 static int smiapp_change_cci_addr(struct smiapp_sensor *sensor)
 986 {
 987         struct i2c_client *client = v4l2_get_subdevdata(&sensor->src->sd);
 988         int rval;
 989         u32 val;
 990
 991         client->addr = sensor->platform_data->i2c_addr_dfl;
 992
 993         rval = smiapp_write(sensor,
 994                             SMIAPP_REG_U8_CCI_ADDRESS_CONTROL,
 995                             sensor->platform_data->i2c_addr_alt << 1);
 996         if (rval)
 997                 return rval;
 998
 999         client->addr = sensor->platform_data->i2c_addr_alt;
1000
1001         /* verify addr change went ok */
1002         rval = smiapp_read(sensor, SMIAPP_REG_U8_CCI_ADDRESS_CONTROL, &val);
1003         if (rval)
1004                 return rval;
1005
1006         if (val != sensor->platform_data->i2c_addr_alt << 1)
1007                 return -ENODEV;
1008
1009         return 0;
1010 }
1011
1012 /*
1013  *
1014  * SMIA++ Mode Control
1015  *
1016  */
1017 static int smiapp_setup_flash_strobe(struct smiapp_sensor *sensor)
1018 {
1019         struct smiapp_flash_strobe_parms *strobe_setup;
1020         unsigned int ext_freq = sensor->platform_data->ext_clk;
1021         u32 tmp;
1022         u32 strobe_adjustment;
1023         u32 strobe_width_high_rs;
1024         int rval;
1025
1026         strobe_setup = sensor->platform_data->strobe_setup;
1027
1028         /*
1029          * How to calculate registers related to strobe length. Please
1030          * do not change, or if you do at least know what you're
1031          * doing. :-)
1032          *
1033          * Sakari Ailus <sakari.ailus@iki.fi> 2010-10-25
1034          *
1035          * flash_strobe_length [us] / 10^6 = (tFlash_strobe_width_ctrl
1036          *      / EXTCLK freq [Hz]) * flash_strobe_adjustment
1037          *
1038          * tFlash_strobe_width_ctrl E N, [1 - 0xffff]
1039          * flash_strobe_adjustment E N, [1 - 0xff]
1040          *
1041          * The formula above is written as below to keep it on one
1042          * line:
1043          *
1044          * l / 10^6 = w / e * a
1045          *
1046          * Let's mark w * a by x:
1047          *
1048          * x = w * a
1049          *
1050          * Thus, we get:
1051          *
1052          * x = l * e / 10^6
1053          *
1054          * The strobe width must be at least as long as requested,
1055          * thus rounding upwards is needed.
1056          *
1057          * x = (l * e + 10^6 - 1) / 10^6
1058          * -----------------------------
1059          *
1060          * Maximum possible accuracy is wanted at all times. Thus keep
1061          * a as small as possible.
1062          *
1063          * Calculate a, assuming maximum w, with rounding upwards:
1064          *
1065          * a = (x + (2^16 - 1) - 1) / (2^16 - 1)
1066          * -------------------------------------
1067          *
1068          * Thus, we also get w, with that a, with rounding upwards:
1069          *
1070          * w = (x + a - 1) / a
1071          * -------------------
1072          *
1073          * To get limits:
1074          *
1075          * x E [1, (2^16 - 1) * (2^8 - 1)]
1076          *
1077          * Substituting maximum x to the original formula (with rounding),
1078          * the maximum l is thus
1079          *
1080          * (2^16 - 1) * (2^8 - 1) * 10^6 = l * e + 10^6 - 1
1081          *
1082          * l = (10^6 * (2^16 - 1) * (2^8 - 1) - 10^6 + 1) / e
1083          * --------------------------------------------------
1084          *
1085          * flash_strobe_length must be clamped between 1 and
1086          * (10^6 * (2^16 - 1) * (2^8 - 1) - 10^6 + 1) / EXTCLK freq.
1087          *
1088          * Then,
1089          *
1090          * flash_strobe_adjustment = ((flash_strobe_length *
1091          *      EXTCLK freq + 10^6 - 1) / 10^6 + (2^16 - 1) - 1) / (2^16 - 1)
1092          *
1093          * tFlash_strobe_width_ctrl = ((flash_strobe_length *
1094          *      EXTCLK freq + 10^6 - 1) / 10^6 +
1095          *      flash_strobe_adjustment - 1) / flash_strobe_adjustment
1096          */
1097         tmp = div_u64(1000000ULL * ((1 << 16) - 1) * ((1 << 8) - 1) -
1098                       1000000 + 1, ext_freq);
1099         strobe_setup->strobe_width_high_us =
1100                 clamp_t(u32, strobe_setup->strobe_width_high_us, 1, tmp);
1101
1102         tmp = div_u64(((u64)strobe_setup->strobe_width_high_us * (u64)ext_freq +
1103                         1000000 - 1), 1000000ULL);
1104         strobe_adjustment = (tmp + (1 << 16) - 1 - 1) / ((1 << 16) - 1);
1105         strobe_width_high_rs = (tmp + strobe_adjustment - 1) /
1106                                 strobe_adjustment;
1107
1108         rval = smiapp_write(sensor, SMIAPP_REG_U8_FLASH_MODE_RS,
1109                             strobe_setup->mode);
1110         if (rval < 0)
1111                 goto out;
1112
1113         rval = smiapp_write(sensor, SMIAPP_REG_U8_FLASH_STROBE_ADJUSTMENT,
1114                             strobe_adjustment);
1115         if (rval < 0)
1116                 goto out;
1117
1118         rval = smiapp_write(
1119                 sensor, SMIAPP_REG_U16_TFLASH_STROBE_WIDTH_HIGH_RS_CTRL,
1120                 strobe_width_high_rs);
1121         if (rval < 0)
1122                 goto out;
1123
1124         rval = smiapp_write(sensor, SMIAPP_REG_U16_TFLASH_STROBE_DELAY_RS_CTRL,
1125                             strobe_setup->strobe_delay);
1126         if (rval < 0)
1127                 goto out;
1128
1129         rval = smiapp_write(sensor, SMIAPP_REG_U16_FLASH_STROBE_START_POINT,
1130                             strobe_setup->stobe_start_point);
1131         if (rval < 0)
1132                 goto out;
1133
1134         rval = smiapp_write(sensor, SMIAPP_REG_U8_FLASH_TRIGGER_RS,
1135                             strobe_setup->trigger);
1136
1137 out:
1138         sensor->platform_data->strobe_setup->trigger = 0;
1139
1140         return rval;
1141 }
1142
1143 /* -----------------------------------------------------------------------------
1144  * Power management
1145  */
1146
1147 static int smiapp_power_on(struct smiapp_sensor *sensor)
1148 {
1149         struct i2c_client *client = v4l2_get_subdevdata(&sensor->src->sd);
1150         unsigned int sleep;
1151         int rval;
1152
1153         rval = regulator_enable(sensor->vana);
1154         if (rval) {
1155                 dev_err(&client->dev, "failed to enable vana regulator\n");
1156                 return rval;
1157         }
1158         usleep_range(1000, 1000);
1159
1160         if (sensor->platform_data->set_xclk)
1161                 rval = sensor->platform_data->set_xclk(
1162                         &sensor->src->sd, sensor->platform_data->ext_clk);
1163         else
1164                 rval = clk_prepare_enable(sensor->ext_clk);
1165         if (rval < 0) {
1166                 dev_dbg(&client->dev, "failed to enable xclk\n");
1167                 goto out_xclk_fail;
1168         }
1169         usleep_range(1000, 1000);
1170
1171         if (gpio_is_valid(sensor->platform_data->xshutdown))
1172                 gpio_set_value(sensor->platform_data->xshutdown, 1);
1173
1174         sleep = SMIAPP_RESET_DELAY(sensor->platform_data->ext_clk);
1175         usleep_range(sleep, sleep);
1176
1177         /*
1178          * Failures to respond to the address change command have been noticed.
1179          * Those failures seem to be caused by the sensor requiring a longer
1180          * boot time than advertised. An additional 10ms delay seems to work
1181          * around the issue, but the SMIA++ I2C write retry hack makes the delay
1182          * unnecessary. The failures need to be investigated to find a proper
1183          * fix, and a delay will likely need to be added here if the I2C write
1184          * retry hack is reverted before the root cause of the boot time issue
1185          * is found.
1186          */
1187
1188         if (sensor->platform_data->i2c_addr_alt) {
1189                 rval = smiapp_change_cci_addr(sensor);
1190                 if (rval) {
1191                         dev_err(&client->dev, "cci address change error\n");
1192                         goto out_cci_addr_fail;
1193                 }
1194         }
1195
1196         rval = smiapp_write(sensor, SMIAPP_REG_U8_SOFTWARE_RESET,
1197                             SMIAPP_SOFTWARE_RESET);
1198         if (rval < 0) {
1199                 dev_err(&client->dev, "software reset failed\n");
1200                 goto out_cci_addr_fail;
1201         }
1202
1203         if (sensor->platform_data->i2c_addr_alt) {
1204                 rval = smiapp_change_cci_addr(sensor);
1205                 if (rval) {
1206                         dev_err(&client->dev, "cci address change error\n");
1207                         goto out_cci_addr_fail;
1208                 }
1209         }
1210
1211         rval = smiapp_write(sensor, SMIAPP_REG_U16_COMPRESSION_MODE,
1212                             SMIAPP_COMPRESSION_MODE_SIMPLE_PREDICTOR);
1213         if (rval) {
1214                 dev_err(&client->dev, "compression mode set failed\n");
1215                 goto out_cci_addr_fail;
1216         }
1217
1218         rval = smiapp_write(
1219                 sensor, SMIAPP_REG_U16_EXTCLK_FREQUENCY_MHZ,
1220                 sensor->platform_data->ext_clk / (1000000 / (1 << 8)));
1221         if (rval) {
1222                 dev_err(&client->dev, "extclk frequency set failed\n");
1223                 goto out_cci_addr_fail;
1224         }
1225
1226         rval = smiapp_write(sensor, SMIAPP_REG_U8_CSI_LANE_MODE,
1227                             sensor->platform_data->lanes - 1);
1228         if (rval) {
1229                 dev_err(&client->dev, "csi lane mode set failed\n");
1230                 goto out_cci_addr_fail;
1231         }
1232
1233         rval = smiapp_write(sensor, SMIAPP_REG_U8_FAST_STANDBY_CTRL,
1234                             SMIAPP_FAST_STANDBY_CTRL_IMMEDIATE);
1235         if (rval) {
1236                 dev_err(&client->dev, "fast standby set failed\n");
1237                 goto out_cci_addr_fail;
1238         }
1239
1240         rval = smiapp_write(sensor, SMIAPP_REG_U8_CSI_SIGNALLING_MODE,
1241                             sensor->platform_data->csi_signalling_mode);
1242         if (rval) {
1243                 dev_err(&client->dev, "csi signalling mode set failed\n");
1244                 goto out_cci_addr_fail;
1245         }
1246
1247         /* DPHY control done by sensor based on requested link rate */
1248         rval = smiapp_write(sensor, SMIAPP_REG_U8_DPHY_CTRL,
1249                             SMIAPP_DPHY_CTRL_UI);
1250         if (rval < 0)
1251                 return rval;
1252
1253         rval = smiapp_call_quirk(sensor, post_poweron);
1254         if (rval) {
1255                 dev_err(&client->dev, "post_poweron quirks failed\n");
1256                 goto out_cci_addr_fail;
1257         }
1258
1259         /* Are we still initialising...? If yes, return here. */
1260         if (!sensor->pixel_array)
1261                 return 0;
1262
1263         rval = v4l2_ctrl_handler_setup(
1264                 &sensor->pixel_array->ctrl_handler);
1265         if (rval)
1266                 goto out_cci_addr_fail;
1267
1268         rval = v4l2_ctrl_handler_setup(&sensor->src->ctrl_handler);
1269         if (rval)
1270                 goto out_cci_addr_fail;
1271
1272         mutex_lock(&sensor->mutex);
1273         rval = smiapp_update_mode(sensor);
1274         mutex_unlock(&sensor->mutex);
1275         if (rval < 0)
1276                 goto out_cci_addr_fail;
1277
1278         return 0;
1279
1280 out_cci_addr_fail:
1281         if (gpio_is_valid(sensor->platform_data->xshutdown))
1282                 gpio_set_value(sensor->platform_data->xshutdown, 0);
1283         if (sensor->platform_data->set_xclk)
1284                 sensor->platform_data->set_xclk(&sensor->src->sd, 0);
1285         else
1286                 clk_disable_unprepare(sensor->ext_clk);
1287
1288 out_xclk_fail:
1289         regulator_disable(sensor->vana);
1290         return rval;
1291 }
1292
1293 static void smiapp_power_off(struct smiapp_sensor *sensor)
1294 {
1295         /*
1296          * Currently power/clock to lens are enable/disabled separately
1297          * but they are essentially the same signals. So if the sensor is
1298          * powered off while the lens is powered on the sensor does not
1299          * really see a power off and next time the cci address change
1300          * will fail. So do a soft reset explicitly here.
1301          */
1302         if (sensor->platform_data->i2c_addr_alt)
1303                 smiapp_write(sensor,
1304                              SMIAPP_REG_U8_SOFTWARE_RESET,
1305                              SMIAPP_SOFTWARE_RESET);
1306
1307         if (gpio_is_valid(sensor->platform_data->xshutdown))
1308                 gpio_set_value(sensor->platform_data->xshutdown, 0);
1309         if (sensor->platform_data->set_xclk)
1310                 sensor->platform_data->set_xclk(&sensor->src->sd, 0);
1311         else
1312                 clk_disable_unprepare(sensor->ext_clk);
1313         usleep_range(5000, 5000);
1314         regulator_disable(sensor->vana);
1315         sensor->streaming = 0;
1316 }
1317
1318 static int smiapp_set_power(struct v4l2_subdev *subdev, int on)
1319 {
1320         struct smiapp_sensor *sensor = to_smiapp_sensor(subdev);
1321         int ret = 0;
1322
1323         mutex_lock(&sensor->power_mutex);
1324
1325         /*
1326          * If the power count is modified from 0 to != 0 or from != 0
1327          * to 0, update the power state.
1328          */
1329         if (!sensor->power_count == !on)
1330                 goto out;
1331
1332         if (on) {
1333                 /* Power on and perform initialisation. */
1334                 ret = smiapp_power_on(sensor);
1335                 if (ret < 0)
1336                         goto out;
1337         } else {
1338                 smiapp_power_off(sensor);
1339         }
1340
1341         /* Update the power count. */
1342         sensor->power_count += on ? 1 : -1;
1343         WARN_ON(sensor->power_count < 0);
1344
1345 out:
1346         mutex_unlock(&sensor->power_mutex);
1347         return ret;
1348 }
1349
1350 /* -----------------------------------------------------------------------------
1351  * Video stream management
1352  */
1353
1354 static int smiapp_start_streaming(struct smiapp_sensor *sensor)
1355 {
1356         struct i2c_client *client = v4l2_get_subdevdata(&sensor->src->sd);
1357         int rval;
1358
1359         mutex_lock(&sensor->mutex);
1360
1361         rval = smiapp_write(sensor, SMIAPP_REG_U16_CSI_DATA_FORMAT,
1362                             (sensor->csi_format->width << 8) |
1363                             sensor->csi_format->compressed);
1364         if (rval)
1365                 goto out;
1366
1367         rval = smiapp_pll_configure(sensor);
1368         if (rval)
1369                 goto out;
1370
1371         /* Analog crop start coordinates */
1372         rval = smiapp_write(sensor, SMIAPP_REG_U16_X_ADDR_START,
1373                             sensor->pixel_array->crop[SMIAPP_PA_PAD_SRC].left);
1374         if (rval < 0)
1375                 goto out;
1376
1377         rval = smiapp_write(sensor, SMIAPP_REG_U16_Y_ADDR_START,
1378                             sensor->pixel_array->crop[SMIAPP_PA_PAD_SRC].top);
1379         if (rval < 0)
1380                 goto out;
1381
1382         /* Analog crop end coordinates */
1383         rval = smiapp_write(
1384                 sensor, SMIAPP_REG_U16_X_ADDR_END,
1385                 sensor->pixel_array->crop[SMIAPP_PA_PAD_SRC].left
1386                 + sensor->pixel_array->crop[SMIAPP_PA_PAD_SRC].width - 1);
1387         if (rval < 0)
1388                 goto out;
1389
1390         rval = smiapp_write(
1391                 sensor, SMIAPP_REG_U16_Y_ADDR_END,
1392                 sensor->pixel_array->crop[SMIAPP_PA_PAD_SRC].top
1393                 + sensor->pixel_array->crop[SMIAPP_PA_PAD_SRC].height - 1);
1394         if (rval < 0)
1395                 goto out;
1396
1397         /*
1398          * Output from pixel array, including blanking, is set using
1399          * controls below. No need to set here.
1400          */
1401
1402         /* Digital crop */
1403         if (sensor->limits[SMIAPP_LIMIT_DIGITAL_CROP_CAPABILITY]
1404             == SMIAPP_DIGITAL_CROP_CAPABILITY_INPUT_CROP) {
1405                 rval = smiapp_write(
1406                         sensor, SMIAPP_REG_U16_DIGITAL_CROP_X_OFFSET,
1407                         sensor->scaler->crop[SMIAPP_PAD_SINK].left);
1408                 if (rval < 0)
1409                         goto out;
1410
1411                 rval = smiapp_write(
1412                         sensor, SMIAPP_REG_U16_DIGITAL_CROP_Y_OFFSET,
1413                         sensor->scaler->crop[SMIAPP_PAD_SINK].top);
1414                 if (rval < 0)
1415                         goto out;
1416
1417                 rval = smiapp_write(
1418                         sensor, SMIAPP_REG_U16_DIGITAL_CROP_IMAGE_WIDTH,
1419                         sensor->scaler->crop[SMIAPP_PAD_SINK].width);
1420                 if (rval < 0)
1421                         goto out;
1422
1423                 rval = smiapp_write(
1424                         sensor, SMIAPP_REG_U16_DIGITAL_CROP_IMAGE_HEIGHT,
1425                         sensor->scaler->crop[SMIAPP_PAD_SINK].height);
1426                 if (rval < 0)
1427                         goto out;
1428         }
1429
1430         /* Scaling */
1431         if (sensor->limits[SMIAPP_LIMIT_SCALING_CAPABILITY]
1432             != SMIAPP_SCALING_CAPABILITY_NONE) {
1433                 rval = smiapp_write(sensor, SMIAPP_REG_U16_SCALING_MODE,
1434                                     sensor->scaling_mode);
1435                 if (rval < 0)
1436                         goto out;
1437
1438                 rval = smiapp_write(sensor, SMIAPP_REG_U16_SCALE_M,
1439                                     sensor->scale_m);
1440                 if (rval < 0)
1441                         goto out;
1442         }
1443
1444         /* Output size from sensor */
1445         rval = smiapp_write(sensor, SMIAPP_REG_U16_X_OUTPUT_SIZE,
1446                             sensor->src->crop[SMIAPP_PAD_SRC].width);
1447         if (rval < 0)
1448                 goto out;
1449         rval = smiapp_write(sensor, SMIAPP_REG_U16_Y_OUTPUT_SIZE,
1450                             sensor->src->crop[SMIAPP_PAD_SRC].height);
1451         if (rval < 0)
1452                 goto out;
1453
1454         if ((sensor->flash_capability &
1455              (SMIAPP_FLASH_MODE_CAPABILITY_SINGLE_STROBE |
1456               SMIAPP_FLASH_MODE_CAPABILITY_MULTIPLE_STROBE)) &&
1457             sensor->platform_data->strobe_setup != NULL &&
1458             sensor->platform_data->strobe_setup->trigger != 0) {
1459                 rval = smiapp_setup_flash_strobe(sensor);
1460                 if (rval)
1461                         goto out;
1462         }
1463
1464         rval = smiapp_call_quirk(sensor, pre_streamon);
1465         if (rval) {
1466                 dev_err(&client->dev, "pre_streamon quirks failed\n");
1467                 goto out;
1468         }
1469
1470         rval = smiapp_write(sensor, SMIAPP_REG_U8_MODE_SELECT,
1471                             SMIAPP_MODE_SELECT_STREAMING);
1472
1473 out:
1474         mutex_unlock(&sensor->mutex);
1475
1476         return rval;
1477 }
1478
1479 static int smiapp_stop_streaming(struct smiapp_sensor *sensor)
1480 {
1481         struct i2c_client *client = v4l2_get_subdevdata(&sensor->src->sd);
1482         int rval;
1483
1484         mutex_lock(&sensor->mutex);
1485         rval = smiapp_write(sensor, SMIAPP_REG_U8_MODE_SELECT,
1486                             SMIAPP_MODE_SELECT_SOFTWARE_STANDBY);
1487         if (rval)
1488                 goto out;
1489
1490         rval = smiapp_call_quirk(sensor, post_streamoff);
1491         if (rval)
1492                 dev_err(&client->dev, "post_streamoff quirks failed\n");
1493
1494 out:
1495         mutex_unlock(&sensor->mutex);
1496         return rval;
1497 }
1498
1499 /* -----------------------------------------------------------------------------
1500  * V4L2 subdev video operations
1501  */
1502
1503 static int smiapp_set_stream(struct v4l2_subdev *subdev, int enable)
1504 {
1505         struct smiapp_sensor *sensor = to_smiapp_sensor(subdev);
1506         int rval;
1507
1508         if (sensor->streaming == enable)
1509                 return 0;
1510
1511         if (enable) {
1512                 sensor->streaming = 1;
1513                 rval = smiapp_start_streaming(sensor);
1514                 if (rval < 0)
1515                         sensor->streaming = 0;
1516         } else {
1517                 rval = smiapp_stop_streaming(sensor);
1518                 sensor->streaming = 0;
1519         }
1520
1521         return rval;
1522 }
1523
1524 static int smiapp_enum_mbus_code(struct v4l2_subdev *subdev,
1525                                  struct v4l2_subdev_fh *fh,
1526                                  struct v4l2_subdev_mbus_code_enum *code)
1527 {
1528         struct i2c_client *client = v4l2_get_subdevdata(subdev);
1529         struct smiapp_sensor *sensor = to_smiapp_sensor(subdev);
1530         unsigned int i;
1531         int idx = -1;
1532         int rval = -EINVAL;
1533
1534         mutex_lock(&sensor->mutex);
1535
1536         dev_err(&client->dev, "subdev %s, pad %d, index %d\n",
1537                 subdev->name, code->pad, code->index);
1538
1539         if (subdev != &sensor->src->sd || code->pad != SMIAPP_PAD_SRC) {
1540                 if (code->index)
1541                         goto out;
1542
1543                 code->code = sensor->internal_csi_format->code;
1544                 rval = 0;
1545                 goto out;
1546         }
1547
1548         for (i = 0; i < ARRAY_SIZE(smiapp_csi_data_formats); i++) {
1549                 if (sensor->mbus_frame_fmts & (1 << i))
1550                         idx++;
1551
1552                 if (idx == code->index) {
1553                         code->code = smiapp_csi_data_formats[i].code;
1554                         dev_err(&client->dev, "found index %d, i %d, code %x\n",
1555                                 code->index, i, code->code);
1556                         rval = 0;
1557                         break;
1558                 }
1559         }
1560
1561 out:
1562         mutex_unlock(&sensor->mutex);
1563
1564         return rval;
1565 }
1566
1567 static u32 __smiapp_get_mbus_code(struct v4l2_subdev *subdev,
1568                                   unsigned int pad)
1569 {
1570         struct smiapp_sensor *sensor = to_smiapp_sensor(subdev);
1571
1572         if (subdev == &sensor->src->sd && pad == SMIAPP_PAD_SRC)
1573                 return sensor->csi_format->code;
1574         else
1575                 return sensor->internal_csi_format->code;
1576 }
1577
1578 static int __smiapp_get_format(struct v4l2_subdev *subdev,
1579                                struct v4l2_subdev_fh *fh,
1580                                struct v4l2_subdev_format *fmt)
1581 {
1582         struct smiapp_subdev *ssd = to_smiapp_subdev(subdev);
1583
1584         if (fmt->which == V4L2_SUBDEV_FORMAT_TRY) {
1585                 fmt->format = *v4l2_subdev_get_try_format(fh, fmt->pad);
1586         } else {
1587                 struct v4l2_rect *r;
1588
1589                 if (fmt->pad == ssd->source_pad)
1590                         r = &ssd->crop[ssd->source_pad];
1591                 else
1592                         r = &ssd->sink_fmt;
1593
1594                 fmt->format.code = __smiapp_get_mbus_code(subdev, fmt->pad);
1595                 fmt->format.width = r->width;
1596                 fmt->format.height = r->height;
1597                 fmt->format.field = V4L2_FIELD_NONE;
1598         }
1599
1600         return 0;
1601 }
1602
1603 static int smiapp_get_format(struct v4l2_subdev *subdev,
1604                              struct v4l2_subdev_fh *fh,
1605                              struct v4l2_subdev_format *fmt)
1606 {
1607         struct smiapp_sensor *sensor = to_smiapp_sensor(subdev);
1608         int rval;
1609
1610         mutex_lock(&sensor->mutex);
1611         rval = __smiapp_get_format(subdev, fh, fmt);
1612         mutex_unlock(&sensor->mutex);
1613
1614         return rval;
1615 }
1616
1617 static void smiapp_get_crop_compose(struct v4l2_subdev *subdev,
1618                                     struct v4l2_subdev_fh *fh,
1619                                     struct v4l2_rect **crops,
1620                                     struct v4l2_rect **comps, int which)
1621 {
1622         struct smiapp_subdev *ssd = to_smiapp_subdev(subdev);
1623         unsigned int i;
1624
1625         if (which == V4L2_SUBDEV_FORMAT_ACTIVE) {
1626                 if (crops)
1627                         for (i = 0; i < subdev->entity.num_pads; i++)
1628                                 crops[i] = &ssd->crop[i];
1629                 if (comps)
1630                         *comps = &ssd->compose;
1631         } else {
1632                 if (crops) {
1633                         for (i = 0; i < subdev->entity.num_pads; i++) {
1634                                 crops[i] = v4l2_subdev_get_try_crop(fh, i);
1635                                 BUG_ON(!crops[i]);
1636                         }
1637                 }
1638                 if (comps) {
1639                         *comps = v4l2_subdev_get_try_compose(fh,
1640                                                              SMIAPP_PAD_SINK);
1641                         BUG_ON(!*comps);
1642                 }
1643         }
1644 }
1645
1646 /* Changes require propagation only on sink pad. */
1647 static void smiapp_propagate(struct v4l2_subdev *subdev,
1648                              struct v4l2_subdev_fh *fh, int which,
1649                              int target)
1650 {
1651         struct smiapp_sensor *sensor = to_smiapp_sensor(subdev);
1652         struct smiapp_subdev *ssd = to_smiapp_subdev(subdev);
1653         struct v4l2_rect *comp, *crops[SMIAPP_PADS];
1654
1655         smiapp_get_crop_compose(subdev, fh, crops, &comp, which);
1656
1657         switch (target) {
1658         case V4L2_SEL_TGT_CROP:
1659                 comp->width = crops[SMIAPP_PAD_SINK]->width;
1660                 comp->height = crops[SMIAPP_PAD_SINK]->height;
1661                 if (which == V4L2_SUBDEV_FORMAT_ACTIVE) {
1662                         if (ssd == sensor->scaler) {
1663                                 sensor->scale_m =
1664                                         sensor->limits[
1665                                                 SMIAPP_LIMIT_SCALER_N_MIN];
1666                                 sensor->scaling_mode =
1667                                         SMIAPP_SCALING_MODE_NONE;
1668                         } else if (ssd == sensor->binner) {
1669                                 sensor->binning_horizontal = 1;
1670                                 sensor->binning_vertical = 1;
1671                         }
1672                 }
1673                 /* Fall through */
1674         case V4L2_SEL_TGT_COMPOSE:
1675                 *crops[SMIAPP_PAD_SRC] = *comp;
1676                 break;
1677         default:
1678                 BUG();
1679         }
1680 }
1681
1682 static const struct smiapp_csi_data_format
1683 *smiapp_validate_csi_data_format(struct smiapp_sensor *sensor, u32 code)
1684 {
1685         const struct smiapp_csi_data_format *csi_format = sensor->csi_format;
1686         unsigned int i;
1687
1688         for (i = 0; i < ARRAY_SIZE(smiapp_csi_data_formats); i++) {
1689                 if (sensor->mbus_frame_fmts & (1 << i)
1690                     && smiapp_csi_data_formats[i].code == code)
1691                         return &smiapp_csi_data_formats[i];
1692         }
1693
1694         return csi_format;
1695 }
1696
1697 static int smiapp_set_format(struct v4l2_subdev *subdev,
1698                              struct v4l2_subdev_fh *fh,
1699                              struct v4l2_subdev_format *fmt)
1700 {
1701         struct smiapp_sensor *sensor = to_smiapp_sensor(subdev);
1702         struct smiapp_subdev *ssd = to_smiapp_subdev(subdev);
1703         struct v4l2_rect *crops[SMIAPP_PADS];
1704
1705         mutex_lock(&sensor->mutex);
1706
1707         /*
1708          * Media bus code is changeable on src subdev's source pad. On
1709          * other source pads we just get format here.
1710          */
1711         if (fmt->pad == ssd->source_pad) {
1712                 u32 code = fmt->format.code;
1713                 int rval = __smiapp_get_format(subdev, fh, fmt);
1714                 bool range_changed = false;
1715                 unsigned int i;
1716
1717                 if (!rval && subdev == &sensor->src->sd) {
1718                         const struct smiapp_csi_data_format *csi_format =
1719                                 smiapp_validate_csi_data_format(sensor, code);
1720
1721                         if (fmt->which == V4L2_SUBDEV_FORMAT_ACTIVE) {
1722                                 if (csi_format->width !=
1723                                     sensor->csi_format->width)
1724                                         range_changed = true;
1725
1726                                 sensor->csi_format = csi_format;
1727                         }
1728
1729                         fmt->format.code = csi_format->code;
1730                 }
1731
1732                 mutex_unlock(&sensor->mutex);
1733                 if (rval || !range_changed)
1734                         return rval;
1735
1736                 for (i = 0; i < ARRAY_SIZE(sensor->test_data); i++)
1737                         v4l2_ctrl_modify_range(
1738                                 sensor->test_data[i],
1739                                 0, (1 << sensor->csi_format->width) - 1, 1, 0);
1740
1741                 return 0;
1742         }
1743
1744         /* Sink pad. Width and height are changeable here. */
1745         fmt->format.code = __smiapp_get_mbus_code(subdev, fmt->pad);
1746         fmt->format.width &= ~1;
1747         fmt->format.height &= ~1;
1748         fmt->format.field = V4L2_FIELD_NONE;
1749
1750         fmt->format.width =
1751                 clamp(fmt->format.width,
1752                       sensor->limits[SMIAPP_LIMIT_MIN_X_OUTPUT_SIZE],
1753                       sensor->limits[SMIAPP_LIMIT_MAX_X_OUTPUT_SIZE]);
1754         fmt->format.height =
1755                 clamp(fmt->format.height,
1756                       sensor->limits[SMIAPP_LIMIT_MIN_Y_OUTPUT_SIZE],
1757                       sensor->limits[SMIAPP_LIMIT_MAX_Y_OUTPUT_SIZE]);
1758
1759         smiapp_get_crop_compose(subdev, fh, crops, NULL, fmt->which);
1760
1761         crops[ssd->sink_pad]->left = 0;
1762         crops[ssd->sink_pad]->top = 0;
1763         crops[ssd->sink_pad]->width = fmt->format.width;
1764         crops[ssd->sink_pad]->height = fmt->format.height;
1765         if (fmt->which == V4L2_SUBDEV_FORMAT_ACTIVE)
1766                 ssd->sink_fmt = *crops[ssd->sink_pad];
1767         smiapp_propagate(subdev, fh, fmt->which,
1768                          V4L2_SEL_TGT_CROP);
1769
1770         mutex_unlock(&sensor->mutex);
1771
1772         return 0;
1773 }
1774
1775 /*
1776  * Calculate goodness of scaled image size compared to expected image
1777  * size and flags provided.
1778  */
1779 #define SCALING_GOODNESS                100000
1780 #define SCALING_GOODNESS_EXTREME        100000000
1781 static int scaling_goodness(struct v4l2_subdev *subdev, int w, int ask_w,
1782                             int h, int ask_h, u32 flags)
1783 {
1784         struct smiapp_sensor *sensor = to_smiapp_sensor(subdev);
1785         struct i2c_client *client = v4l2_get_subdevdata(subdev);
1786         int val = 0;
1787
1788         w &= ~1;
1789         ask_w &= ~1;
1790         h &= ~1;
1791         ask_h &= ~1;
1792
1793         if (flags & V4L2_SEL_FLAG_GE) {
1794                 if (w < ask_w)
1795                         val -= SCALING_GOODNESS;
1796                 if (h < ask_h)
1797                         val -= SCALING_GOODNESS;
1798         }
1799
1800         if (flags & V4L2_SEL_FLAG_LE) {
1801                 if (w > ask_w)
1802                         val -= SCALING_GOODNESS;
1803                 if (h > ask_h)
1804                         val -= SCALING_GOODNESS;
1805         }
1806
1807         val -= abs(w - ask_w);
1808         val -= abs(h - ask_h);
1809
1810         if (w < sensor->limits[SMIAPP_LIMIT_MIN_X_OUTPUT_SIZE])
1811                 val -= SCALING_GOODNESS_EXTREME;
1812
1813         dev_dbg(&client->dev, "w %d ask_w %d h %d ask_h %d goodness %d\n",
1814                 w, ask_h, h, ask_h, val);
1815
1816         return val;
1817 }
1818
1819 static void smiapp_set_compose_binner(struct v4l2_subdev *subdev,
1820                                       struct v4l2_subdev_fh *fh,
1821                                       struct v4l2_subdev_selection *sel,
1822                                       struct v4l2_rect **crops,
1823                                       struct v4l2_rect *comp)
1824 {
1825         struct smiapp_sensor *sensor = to_smiapp_sensor(subdev);
1826         unsigned int i;
1827         unsigned int binh = 1, binv = 1;
1828         int best = scaling_goodness(
1829                 subdev,
1830                 crops[SMIAPP_PAD_SINK]->width, sel->r.width,
1831                 crops[SMIAPP_PAD_SINK]->height, sel->r.height, sel->flags);
1832
1833         for (i = 0; i < sensor->nbinning_subtypes; i++) {
1834                 int this = scaling_goodness(
1835                         subdev,
1836                         crops[SMIAPP_PAD_SINK]->width
1837                         / sensor->binning_subtypes[i].horizontal,
1838                         sel->r.width,
1839                         crops[SMIAPP_PAD_SINK]->height
1840                         / sensor->binning_subtypes[i].vertical,
1841                         sel->r.height, sel->flags);
1842
1843                 if (this > best) {
1844                         binh = sensor->binning_subtypes[i].horizontal;
1845                         binv = sensor->binning_subtypes[i].vertical;
1846                         best = this;
1847                 }
1848         }
1849         if (sel->which == V4L2_SUBDEV_FORMAT_ACTIVE) {
1850                 sensor->binning_vertical = binv;
1851                 sensor->binning_horizontal = binh;
1852         }
1853
1854         sel->r.width = (crops[SMIAPP_PAD_SINK]->width / binh) & ~1;
1855         sel->r.height = (crops[SMIAPP_PAD_SINK]->height / binv) & ~1;
1856 }
1857
1858 /*
1859  * Calculate best scaling ratio and mode for given output resolution.
1860  *
1861  * Try all of these: horizontal ratio, vertical ratio and smallest
1862  * size possible (horizontally).
1863  *
1864  * Also try whether horizontal scaler or full scaler gives a better
1865  * result.
1866  */
1867 static void smiapp_set_compose_scaler(struct v4l2_subdev *subdev,
1868                                       struct v4l2_subdev_fh *fh,
1869                                       struct v4l2_subdev_selection *sel,
1870                                       struct v4l2_rect **crops,
1871                                       struct v4l2_rect *comp)
1872 {
1873         struct i2c_client *client = v4l2_get_subdevdata(subdev);
1874         struct smiapp_sensor *sensor = to_smiapp_sensor(subdev);
1875         u32 min, max, a, b, max_m;
1876         u32 scale_m = sensor->limits[SMIAPP_LIMIT_SCALER_N_MIN];
1877         int mode = SMIAPP_SCALING_MODE_HORIZONTAL;
1878         u32 try[4];
1879         u32 ntry = 0;
1880         unsigned int i;
1881         int best = INT_MIN;
1882
1883         sel->r.width = min_t(unsigned int, sel->r.width,
1884                              crops[SMIAPP_PAD_SINK]->width);
1885         sel->r.height = min_t(unsigned int, sel->r.height,
1886                               crops[SMIAPP_PAD_SINK]->height);
1887
1888         a = crops[SMIAPP_PAD_SINK]->width
1889                 * sensor->limits[SMIAPP_LIMIT_SCALER_N_MIN] / sel->r.width;
1890         b = crops[SMIAPP_PAD_SINK]->height
1891                 * sensor->limits[SMIAPP_LIMIT_SCALER_N_MIN] / sel->r.height;
1892         max_m = crops[SMIAPP_PAD_SINK]->width
1893                 * sensor->limits[SMIAPP_LIMIT_SCALER_N_MIN]
1894                 / sensor->limits[SMIAPP_LIMIT_MIN_X_OUTPUT_SIZE];
1895
1896         a = clamp(a, sensor->limits[SMIAPP_LIMIT_SCALER_M_MIN],
1897                   sensor->limits[SMIAPP_LIMIT_SCALER_M_MAX]);
1898         b = clamp(b, sensor->limits[SMIAPP_LIMIT_SCALER_M_MIN],
1899                   sensor->limits[SMIAPP_LIMIT_SCALER_M_MAX]);
1900         max_m = clamp(max_m, sensor->limits[SMIAPP_LIMIT_SCALER_M_MIN],
1901                       sensor->limits[SMIAPP_LIMIT_SCALER_M_MAX]);
1902
1903         dev_dbg(&client->dev, "scaling: a %d b %d max_m %d\n", a, b, max_m);
1904
1905         min = min(max_m, min(a, b));
1906         max = min(max_m, max(a, b));
1907
1908         try[ntry] = min;
1909         ntry++;
1910         if (min != max) {
1911                 try[ntry] = max;
1912                 ntry++;
1913         }
1914         if (max != max_m) {
1915                 try[ntry] = min + 1;
1916                 ntry++;
1917                 if (min != max) {
1918                         try[ntry] = max + 1;
1919                         ntry++;
1920                 }
1921         }
1922
1923         for (i = 0; i < ntry; i++) {
1924                 int this = scaling_goodness(
1925                         subdev,
1926                         crops[SMIAPP_PAD_SINK]->width
1927                         / try[i]
1928                         * sensor->limits[SMIAPP_LIMIT_SCALER_N_MIN],
1929                         sel->r.width,
1930                         crops[SMIAPP_PAD_SINK]->height,
1931                         sel->r.height,
1932                         sel->flags);
1933
1934                 dev_dbg(&client->dev, "trying factor %d (%d)\n", try[i], i);
1935
1936                 if (this > best) {
1937                         scale_m = try[i];
1938                         mode = SMIAPP_SCALING_MODE_HORIZONTAL;
1939                         best = this;
1940                 }
1941
1942                 if (sensor->limits[SMIAPP_LIMIT_SCALING_CAPABILITY]
1943                     == SMIAPP_SCALING_CAPABILITY_HORIZONTAL)
1944                         continue;
1945
1946                 this = scaling_goodness(
1947                         subdev, crops[SMIAPP_PAD_SINK]->width
1948                         / try[i]
1949                         * sensor->limits[SMIAPP_LIMIT_SCALER_N_MIN],
1950                         sel->r.width,
1951                         crops[SMIAPP_PAD_SINK]->height
1952                         / try[i]
1953                         * sensor->limits[SMIAPP_LIMIT_SCALER_N_MIN],
1954                         sel->r.height,
1955                         sel->flags);
1956
1957                 if (this > best) {
1958                         scale_m = try[i];
1959                         mode = SMIAPP_SCALING_MODE_BOTH;
1960                         best = this;
1961                 }
1962         }
1963
1964         sel->r.width =
1965                 (crops[SMIAPP_PAD_SINK]->width
1966                  / scale_m
1967                  * sensor->limits[SMIAPP_LIMIT_SCALER_N_MIN]) & ~1;
1968         if (mode == SMIAPP_SCALING_MODE_BOTH)
1969                 sel->r.height =
1970                         (crops[SMIAPP_PAD_SINK]->height
1971                          / scale_m
1972                          * sensor->limits[SMIAPP_LIMIT_SCALER_N_MIN])
1973                         & ~1;
1974         else
1975                 sel->r.height = crops[SMIAPP_PAD_SINK]->height;
1976
1977         if (sel->which == V4L2_SUBDEV_FORMAT_ACTIVE) {
1978                 sensor->scale_m = scale_m;
1979                 sensor->scaling_mode = mode;
1980         }
1981 }
1982 /* We're only called on source pads. This function sets scaling. */
1983 static int smiapp_set_compose(struct v4l2_subdev *subdev,
1984                               struct v4l2_subdev_fh *fh,
1985                               struct v4l2_subdev_selection *sel)
1986 {
1987         struct smiapp_sensor *sensor = to_smiapp_sensor(subdev);
1988         struct smiapp_subdev *ssd = to_smiapp_subdev(subdev);
1989         struct v4l2_rect *comp, *crops[SMIAPP_PADS];
1990
1991         smiapp_get_crop_compose(subdev, fh, crops, &comp, sel->which);
1992
1993         sel->r.top = 0;
1994         sel->r.left = 0;
1995
1996         if (ssd == sensor->binner)
1997                 smiapp_set_compose_binner(subdev, fh, sel, crops, comp);
1998         else
1999                 smiapp_set_compose_scaler(subdev, fh, sel, crops, comp);
2000
2001         *comp = sel->r;
2002         smiapp_propagate(subdev, fh, sel->which,
2003                          V4L2_SEL_TGT_COMPOSE);
2004
2005         if (sel->which == V4L2_SUBDEV_FORMAT_ACTIVE)
2006                 return smiapp_update_mode(sensor);
2007
2008         return 0;
2009 }
2010
2011 static int __smiapp_sel_supported(struct v4l2_subdev *subdev,
2012                                   struct v4l2_subdev_selection *sel)
2013 {
2014         struct smiapp_sensor *sensor = to_smiapp_sensor(subdev);
2015         struct smiapp_subdev *ssd = to_smiapp_subdev(subdev);
2016
2017         /* We only implement crop in three places. */
2018         switch (sel->target) {
2019         case V4L2_SEL_TGT_CROP:
2020         case V4L2_SEL_TGT_CROP_BOUNDS:
2021                 if (ssd == sensor->pixel_array
2022                     && sel->pad == SMIAPP_PA_PAD_SRC)
2023                         return 0;
2024                 if (ssd == sensor->src
2025                     && sel->pad == SMIAPP_PAD_SRC)
2026                         return 0;
2027                 if (ssd == sensor->scaler
2028                     && sel->pad == SMIAPP_PAD_SINK
2029                     && sensor->limits[SMIAPP_LIMIT_DIGITAL_CROP_CAPABILITY]
2030                     == SMIAPP_DIGITAL_CROP_CAPABILITY_INPUT_CROP)
2031                         return 0;
2032                 return -EINVAL;
2033         case V4L2_SEL_TGT_COMPOSE:
2034         case V4L2_SEL_TGT_COMPOSE_BOUNDS:
2035                 if (sel->pad == ssd->source_pad)
2036                         return -EINVAL;
2037                 if (ssd == sensor->binner)
2038                         return 0;
2039                 if (ssd == sensor->scaler
2040                     && sensor->limits[SMIAPP_LIMIT_SCALING_CAPABILITY]
2041                     != SMIAPP_SCALING_CAPABILITY_NONE)
2042                         return 0;
2043                 /* Fall through */
2044         default:
2045                 return -EINVAL;
2046         }
2047 }
2048
2049 static int smiapp_set_crop(struct v4l2_subdev *subdev,
2050                            struct v4l2_subdev_fh *fh,
2051                            struct v4l2_subdev_selection *sel)
2052 {
2053         struct smiapp_sensor *sensor = to_smiapp_sensor(subdev);
2054         struct smiapp_subdev *ssd = to_smiapp_subdev(subdev);
2055         struct v4l2_rect *src_size, *crops[SMIAPP_PADS];
2056         struct v4l2_rect _r;
2057
2058         smiapp_get_crop_compose(subdev, fh, crops, NULL, sel->which);
2059
2060         if (sel->which == V4L2_SUBDEV_FORMAT_ACTIVE) {
2061                 if (sel->pad == ssd->sink_pad)
2062                         src_size = &ssd->sink_fmt;
2063                 else
2064                         src_size = &ssd->compose;
2065         } else {
2066                 if (sel->pad == ssd->sink_pad) {
2067                         _r.left = 0;
2068                         _r.top = 0;
2069                         _r.width = v4l2_subdev_get_try_format(fh, sel->pad)
2070                                 ->width;
2071                         _r.height = v4l2_subdev_get_try_format(fh, sel->pad)
2072                                 ->height;
2073                         src_size = &_r;
2074                 } else {
2075                         src_size =
2076                                 v4l2_subdev_get_try_compose(
2077                                         fh, ssd->sink_pad);
2078                 }
2079         }
2080
2081         if (ssd == sensor->src && sel->pad == SMIAPP_PAD_SRC) {
2082                 sel->r.left = 0;
2083                 sel->r.top = 0;
2084         }
2085
2086         sel->r.width = min(sel->r.width, src_size->width);
2087         sel->r.height = min(sel->r.height, src_size->height);
2088
2089         sel->r.left = min_t(int, sel->r.left, src_size->width - sel->r.width);
2090         sel->r.top = min_t(int, sel->r.top, src_size->height - sel->r.height);
2091
2092         *crops[sel->pad] = sel->r;
2093
2094         if (ssd != sensor->pixel_array && sel->pad == SMIAPP_PAD_SINK)
2095                 smiapp_propagate(subdev, fh, sel->which,
2096                                  V4L2_SEL_TGT_CROP);
2097
2098         return 0;
2099 }
2100
2101 static int __smiapp_get_selection(struct v4l2_subdev *subdev,
2102                                   struct v4l2_subdev_fh *fh,
2103                                   struct v4l2_subdev_selection *sel)
2104 {
2105         struct smiapp_sensor *sensor = to_smiapp_sensor(subdev);
2106         struct smiapp_subdev *ssd = to_smiapp_subdev(subdev);
2107         struct v4l2_rect *comp, *crops[SMIAPP_PADS];
2108         struct v4l2_rect sink_fmt;
2109         int ret;
2110
2111         ret = __smiapp_sel_supported(subdev, sel);
2112         if (ret)
2113                 return ret;
2114
2115         smiapp_get_crop_compose(subdev, fh, crops, &comp, sel->which);
2116
2117         if (sel->which == V4L2_SUBDEV_FORMAT_ACTIVE) {
2118                 sink_fmt = ssd->sink_fmt;
2119         } else {
2120                 struct v4l2_mbus_framefmt *fmt =
2121                         v4l2_subdev_get_try_format(fh, ssd->sink_pad);
2122
2123                 sink_fmt.left = 0;
2124                 sink_fmt.top = 0;
2125                 sink_fmt.width = fmt->width;
2126                 sink_fmt.height = fmt->height;
2127         }
2128
2129         switch (sel->target) {
2130         case V4L2_SEL_TGT_CROP_BOUNDS:
2131                 if (ssd == sensor->pixel_array) {
2132                         sel->r.width =
2133                                 sensor->limits[SMIAPP_LIMIT_X_ADDR_MAX] + 1;
2134                         sel->r.height =
2135                                 sensor->limits[SMIAPP_LIMIT_Y_ADDR_MAX] + 1;
2136                 } else if (sel->pad == ssd->sink_pad) {
2137                         sel->r = sink_fmt;
2138                 } else {
2139                         sel->r = *comp;
2140                 }
2141                 break;
2142         case V4L2_SEL_TGT_CROP:
2143         case V4L2_SEL_TGT_COMPOSE_BOUNDS:
2144                 sel->r = *crops[sel->pad];
2145                 break;
2146         case V4L2_SEL_TGT_COMPOSE:
2147                 sel->r = *comp;
2148                 break;
2149         }
2150
2151         return 0;
2152 }
2153
2154 static int smiapp_get_selection(struct v4l2_subdev *subdev,
2155                                 struct v4l2_subdev_fh *fh,
2156                                 struct v4l2_subdev_selection *sel)
2157 {
2158         struct smiapp_sensor *sensor = to_smiapp_sensor(subdev);
2159         int rval;
2160
2161         mutex_lock(&sensor->mutex);
2162         rval = __smiapp_get_selection(subdev, fh, sel);
2163         mutex_unlock(&sensor->mutex);
2164
2165         return rval;
2166 }
2167 static int smiapp_set_selection(struct v4l2_subdev *subdev,
2168                                 struct v4l2_subdev_fh *fh,
2169                                 struct v4l2_subdev_selection *sel)
2170 {
2171         struct smiapp_sensor *sensor = to_smiapp_sensor(subdev);
2172         int ret;
2173
2174         ret = __smiapp_sel_supported(subdev, sel);
2175         if (ret)
2176                 return ret;
2177
2178         mutex_lock(&sensor->mutex);
2179
2180         sel->r.left = max(0, sel->r.left & ~1);
2181         sel->r.top = max(0, sel->r.top & ~1);
2182         sel->r.width = SMIAPP_ALIGN_DIM(sel->r.width, sel->flags);
2183         sel->r.height = SMIAPP_ALIGN_DIM(sel->r.height, sel->flags);
2184
2185         sel->r.width = max_t(unsigned int,
2186                              sensor->limits[SMIAPP_LIMIT_MIN_X_OUTPUT_SIZE],
2187                              sel->r.width);
2188         sel->r.height = max_t(unsigned int,
2189                               sensor->limits[SMIAPP_LIMIT_MIN_Y_OUTPUT_SIZE],
2190                               sel->r.height);
2191
2192         switch (sel->target) {
2193         case V4L2_SEL_TGT_CROP:
2194                 ret = smiapp_set_crop(subdev, fh, sel);
2195                 break;
2196         case V4L2_SEL_TGT_COMPOSE:
2197                 ret = smiapp_set_compose(subdev, fh, sel);
2198                 break;
2199         default:
2200                 BUG();
2201         }
2202
2203         mutex_unlock(&sensor->mutex);
2204         return ret;
2205 }
2206
2207 static int smiapp_get_skip_frames(struct v4l2_subdev *subdev, u32 *frames)
2208 {
2209         struct smiapp_sensor *sensor = to_smiapp_sensor(subdev);
2210
2211         *frames = sensor->frame_skip;
2212         return 0;
2213 }
2214
2215 /* -----------------------------------------------------------------------------
2216  * sysfs attributes
2217  */
2218
2219 static ssize_t
2220 smiapp_sysfs_nvm_read(struct device *dev, struct device_attribute *attr,
2221                       char *buf)
2222 {
2223         struct v4l2_subdev *subdev = i2c_get_clientdata(to_i2c_client(dev));
2224         struct i2c_client *client = v4l2_get_subdevdata(subdev);
2225         struct smiapp_sensor *sensor = to_smiapp_sensor(subdev);
2226         unsigned int nbytes;
2227
2228         if (!sensor->dev_init_done)
2229                 return -EBUSY;
2230
2231         if (!sensor->nvm_size) {
2232                 /* NVM not read yet - read it now */
2233                 sensor->nvm_size = sensor->platform_data->nvm_size;
2234                 if (smiapp_set_power(subdev, 1) < 0)
2235                         return -ENODEV;
2236                 if (smiapp_read_nvm(sensor, sensor->nvm)) {
2237                         dev_err(&client->dev, "nvm read failed\n");
2238                         return -ENODEV;
2239                 }
2240                 smiapp_set_power(subdev, 0);
2241         }
2242         /*
2243          * NVM is still way below a PAGE_SIZE, so we can safely
2244          * assume this for now.
2245          */
2246         nbytes = min_t(unsigned int, sensor->nvm_size, PAGE_SIZE);
2247         memcpy(buf, sensor->nvm, nbytes);
2248
2249         return nbytes;
2250 }
2251 static DEVICE_ATTR(nvm, S_IRUGO, smiapp_sysfs_nvm_read, NULL);
2252
2253 static ssize_t
2254 smiapp_sysfs_ident_read(struct device *dev, struct device_attribute *attr,
2255                         char *buf)
2256 {
2257         struct v4l2_subdev *subdev = i2c_get_clientdata(to_i2c_client(dev));
2258         struct smiapp_sensor *sensor = to_smiapp_sensor(subdev);
2259         struct smiapp_module_info *minfo = &sensor->minfo;
2260
2261         return snprintf(buf, PAGE_SIZE, "%2.2x%4.4x%2.2x\n",
2262                         minfo->manufacturer_id, minfo->model_id,
2263                         minfo->revision_number_major) + 1;
2264 }
2265
2266 static DEVICE_ATTR(ident, S_IRUGO, smiapp_sysfs_ident_read, NULL);
2267
2268 /* -----------------------------------------------------------------------------
2269  * V4L2 subdev core operations
2270  */
2271
2272 static int smiapp_identify_module(struct v4l2_subdev *subdev)
2273 {
2274         struct smiapp_sensor *sensor = to_smiapp_sensor(subdev);
2275         struct i2c_client *client = v4l2_get_subdevdata(subdev);
2276         struct smiapp_module_info *minfo = &sensor->minfo;
2277         unsigned int i;
2278         int rval = 0;
2279
2280         minfo->name = SMIAPP_NAME;
2281
2282         /* Module info */
2283         rval = smiapp_read_8only(sensor, SMIAPP_REG_U8_MANUFACTURER_ID,
2284                                  &minfo->manufacturer_id);
2285         if (!rval)
2286                 rval = smiapp_read_8only(sensor, SMIAPP_REG_U16_MODEL_ID,
2287                                          &minfo->model_id);
2288         if (!rval)
2289                 rval = smiapp_read_8only(sensor,
2290                                          SMIAPP_REG_U8_REVISION_NUMBER_MAJOR,
2291                                          &minfo->revision_number_major);
2292         if (!rval)
2293                 rval = smiapp_read_8only(sensor,
2294                                          SMIAPP_REG_U8_REVISION_NUMBER_MINOR,
2295                                          &minfo->revision_number_minor);
2296         if (!rval)
2297                 rval = smiapp_read_8only(sensor,
2298                                          SMIAPP_REG_U8_MODULE_DATE_YEAR,
2299                                          &minfo->module_year);
2300         if (!rval)
2301                 rval = smiapp_read_8only(sensor,
2302                                          SMIAPP_REG_U8_MODULE_DATE_MONTH,
2303                                          &minfo->module_month);
2304         if (!rval)
2305                 rval = smiapp_read_8only(sensor, SMIAPP_REG_U8_MODULE_DATE_DAY,
2306                                          &minfo->module_day);
2307
2308         /* Sensor info */
2309         if (!rval)
2310                 rval = smiapp_read_8only(sensor,
2311                                          SMIAPP_REG_U8_SENSOR_MANUFACTURER_ID,
2312                                          &minfo->sensor_manufacturer_id);
2313         if (!rval)
2314                 rval = smiapp_read_8only(sensor,
2315                                          SMIAPP_REG_U16_SENSOR_MODEL_ID,
2316                                          &minfo->sensor_model_id);
2317         if (!rval)
2318                 rval = smiapp_read_8only(sensor,
2319                                          SMIAPP_REG_U8_SENSOR_REVISION_NUMBER,
2320                                          &minfo->sensor_revision_number);
2321         if (!rval)
2322                 rval = smiapp_read_8only(sensor,
2323                                          SMIAPP_REG_U8_SENSOR_FIRMWARE_VERSION,
2324                                          &minfo->sensor_firmware_version);
2325
2326         /* SMIA */
2327         if (!rval)
2328                 rval = smiapp_read_8only(sensor, SMIAPP_REG_U8_SMIA_VERSION,
2329                                          &minfo->smia_version);
2330         if (!rval)
2331                 rval = smiapp_read_8only(sensor, SMIAPP_REG_U8_SMIAPP_VERSION,
2332                                          &minfo->smiapp_version);
2333
2334         if (rval) {
2335                 dev_err(&client->dev, "sensor detection failed\n");
2336                 return -ENODEV;
2337         }
2338
2339         dev_dbg(&client->dev, "module 0x%2.2x-0x%4.4x\n",
2340                 minfo->manufacturer_id, minfo->model_id);
2341
2342         dev_dbg(&client->dev,
2343                 "module revision 0x%2.2x-0x%2.2x date %2.2d-%2.2d-%2.2d\n",
2344                 minfo->revision_number_major, minfo->revision_number_minor,
2345                 minfo->module_year, minfo->module_month, minfo->module_day);
2346
2347         dev_dbg(&client->dev, "sensor 0x%2.2x-0x%4.4x\n",
2348                 minfo->sensor_manufacturer_id, minfo->sensor_model_id);
2349
2350         dev_dbg(&client->dev,
2351                 "sensor revision 0x%2.2x firmware version 0x%2.2x\n",
2352                 minfo->sensor_revision_number, minfo->sensor_firmware_version);
2353
2354         dev_dbg(&client->dev, "smia version %2.2d smiapp version %2.2d\n",
2355                 minfo->smia_version, minfo->smiapp_version);
2356
2357         /*
2358          * Some modules have bad data in the lvalues below. Hope the
2359          * rvalues have better stuff. The lvalues are module
2360          * parameters whereas the rvalues are sensor parameters.
2361          */
2362         if (!minfo->manufacturer_id && !minfo->model_id) {
2363                 minfo->manufacturer_id = minfo->sensor_manufacturer_id;
2364                 minfo->model_id = minfo->sensor_model_id;
2365                 minfo->revision_number_major = minfo->sensor_revision_number;
2366         }
2367
2368         for (i = 0; i < ARRAY_SIZE(smiapp_module_idents); i++) {
2369                 if (smiapp_module_idents[i].manufacturer_id
2370                     != minfo->manufacturer_id)
2371                         continue;
2372                 if (smiapp_module_idents[i].model_id != minfo->model_id)
2373                         continue;
2374                 if (smiapp_module_idents[i].flags
2375                     & SMIAPP_MODULE_IDENT_FLAG_REV_LE) {
2376                         if (smiapp_module_idents[i].revision_number_major
2377                             < minfo->revision_number_major)
2378                                 continue;
2379                 } else {
2380                         if (smiapp_module_idents[i].revision_number_major
2381                             != minfo->revision_number_major)
2382                                 continue;
2383                 }
2384
2385                 minfo->name = smiapp_module_idents[i].name;
2386                 minfo->quirk = smiapp_module_idents[i].quirk;
2387                 break;
2388         }
2389
2390         if (i >= ARRAY_SIZE(smiapp_module_idents))
2391                 dev_warn(&client->dev,
2392                          "no quirks for this module; let's hope it's fully compliant\n");
2393
2394         dev_dbg(&client->dev, "the sensor is called %s, ident %2.2x%4.4x%2.2x\n",
2395                 minfo->name, minfo->manufacturer_id, minfo->model_id,
2396                 minfo->revision_number_major);
2397
2398         strlcpy(subdev->name, sensor->minfo.name, sizeof(subdev->name));
2399
2400         return 0;
2401 }
2402
2403 static const struct v4l2_subdev_ops smiapp_ops;
2404 static const struct v4l2_subdev_internal_ops smiapp_internal_ops;
2405 static const struct media_entity_operations smiapp_entity_ops;
2406
2407 static int smiapp_registered(struct v4l2_subdev *subdev)
2408 {
2409         struct smiapp_sensor *sensor = to_smiapp_sensor(subdev);
2410         struct i2c_client *client = v4l2_get_subdevdata(subdev);
2411         struct smiapp_pll *pll = &sensor->pll;
2412         struct smiapp_subdev *last = NULL;
2413         u32 tmp;
2414         unsigned int i;
2415         int rval;
2416
2417         sensor->vana = devm_regulator_get(&client->dev, "vana");
2418         if (IS_ERR(sensor->vana)) {
2419                 dev_err(&client->dev, "could not get regulator for vana\n");
2420                 return PTR_ERR(sensor->vana);
2421         }
2422
2423         if (!sensor->platform_data->set_xclk) {
2424                 sensor->ext_clk = devm_clk_get(&client->dev, "ext_clk");
2425                 if (IS_ERR(sensor->ext_clk)) {
2426                         dev_err(&client->dev, "could not get clock\n");
2427                         return PTR_ERR(sensor->ext_clk);
2428                 }
2429
2430                 rval = clk_set_rate(sensor->ext_clk,
2431                                     sensor->platform_data->ext_clk);
2432                 if (rval < 0) {
2433                         dev_err(&client->dev,
2434                                 "unable to set clock freq to %u\n",
2435                                 sensor->platform_data->ext_clk);
2436                         return rval;
2437                 }
2438         }
2439
2440         if (gpio_is_valid(sensor->platform_data->xshutdown)) {
2441                 rval = devm_gpio_request_one(
2442                         &client->dev, sensor->platform_data->xshutdown, 0,
2443                         "SMIA++ xshutdown");
2444                 if (rval < 0) {
2445                         dev_err(&client->dev,
2446                                 "unable to acquire reset gpio %d\n",
2447                                 sensor->platform_data->xshutdown);
2448                         return rval;
2449                 }
2450         }
2451
2452         rval = smiapp_power_on(sensor);
2453         if (rval)
2454                 return -ENODEV;
2455
2456         rval = smiapp_identify_module(subdev);
2457         if (rval) {
2458                 rval = -ENODEV;
2459                 goto out_power_off;
2460         }
2461
2462         rval = smiapp_get_all_limits(sensor);
2463         if (rval) {
2464                 rval = -ENODEV;
2465                 goto out_power_off;
2466         }
2467
2468         /*
2469          * Handle Sensor Module orientation on the board.
2470          *
2471          * The application of H-FLIP and V-FLIP on the sensor is modified by
2472          * the sensor orientation on the board.
2473          *
2474          * For SMIAPP_BOARD_SENSOR_ORIENT_180 the default behaviour is to set
2475          * both H-FLIP and V-FLIP for normal operation which also implies
2476          * that a set/unset operation for user space HFLIP and VFLIP v4l2
2477          * controls will need to be internally inverted.
2478          *
2479          * Rotation also changes the bayer pattern.
2480          */
2481         if (sensor->platform_data->module_board_orient ==
2482             SMIAPP_MODULE_BOARD_ORIENT_180)
2483                 sensor->hvflip_inv_mask = SMIAPP_IMAGE_ORIENTATION_HFLIP |
2484                                           SMIAPP_IMAGE_ORIENTATION_VFLIP;
2485
2486         rval = smiapp_call_quirk(sensor, limits);
2487         if (rval) {
2488                 dev_err(&client->dev, "limits quirks failed\n");
2489                 goto out_power_off;
2490         }
2491
2492         rval = smiapp_get_mbus_formats(sensor);
2493         if (rval) {
2494                 rval = -ENODEV;
2495                 goto out_power_off;
2496         }
2497
2498         if (sensor->limits[SMIAPP_LIMIT_BINNING_CAPABILITY]) {
2499                 u32 val;
2500
2501                 rval = smiapp_read(sensor,
2502                                    SMIAPP_REG_U8_BINNING_SUBTYPES, &val);
2503                 if (rval < 0) {
2504                         rval = -ENODEV;
2505                         goto out_power_off;
2506                 }
2507                 sensor->nbinning_subtypes = min_t(u8, val,
2508                                                   SMIAPP_BINNING_SUBTYPES);
2509
2510                 for (i = 0; i < sensor->nbinning_subtypes; i++) {
2511                         rval = smiapp_read(
2512                                 sensor, SMIAPP_REG_U8_BINNING_TYPE_n(i), &val);
2513                         if (rval < 0) {
2514                                 rval = -ENODEV;
2515                                 goto out_power_off;
2516                         }
2517                         sensor->binning_subtypes[i] =
2518                                 *(struct smiapp_binning_subtype *)&val;
2519
2520                         dev_dbg(&client->dev, "binning %xx%x\n",
2521                                 sensor->binning_subtypes[i].horizontal,
2522                                 sensor->binning_subtypes[i].vertical);
2523                 }
2524         }
2525         sensor->binning_horizontal = 1;
2526         sensor->binning_vertical = 1;
2527
2528         if (device_create_file(&client->dev, &dev_attr_ident) != 0) {
2529                 dev_err(&client->dev, "sysfs ident entry creation failed\n");
2530                 rval = -ENOENT;
2531                 goto out_power_off;
2532         }
2533         /* SMIA++ NVM initialization - it will be read from the sensor
2534          * when it is first requested by userspace.
2535          */
2536         if (sensor->minfo.smiapp_version && sensor->platform_data->nvm_size) {
2537                 sensor->nvm = devm_kzalloc(&client->dev,
2538                                 sensor->platform_data->nvm_size, GFP_KERNEL);
2539                 if (sensor->nvm == NULL) {
2540                         dev_err(&client->dev, "nvm buf allocation failed\n");
2541                         rval = -ENOMEM;
2542                         goto out_ident_release;
2543                 }
2544
2545                 if (device_create_file(&client->dev, &dev_attr_nvm) != 0) {
2546                         dev_err(&client->dev, "sysfs nvm entry failed\n");
2547                         rval = -EBUSY;
2548                         goto out_ident_release;
2549                 }
2550         }
2551
2552         /* We consider this as profile 0 sensor if any of these are zero. */
2553         if (!sensor->limits[SMIAPP_LIMIT_MIN_OP_SYS_CLK_DIV] ||
2554             !sensor->limits[SMIAPP_LIMIT_MAX_OP_SYS_CLK_DIV] ||
2555             !sensor->limits[SMIAPP_LIMIT_MIN_OP_PIX_CLK_DIV] ||
2556             !sensor->limits[SMIAPP_LIMIT_MAX_OP_PIX_CLK_DIV]) {
2557                 sensor->minfo.smiapp_profile = SMIAPP_PROFILE_0;
2558         } else if (sensor->limits[SMIAPP_LIMIT_SCALING_CAPABILITY]
2559                    != SMIAPP_SCALING_CAPABILITY_NONE) {
2560                 if (sensor->limits[SMIAPP_LIMIT_SCALING_CAPABILITY]
2561                     == SMIAPP_SCALING_CAPABILITY_HORIZONTAL)
2562                         sensor->minfo.smiapp_profile = SMIAPP_PROFILE_1;
2563                 else
2564                         sensor->minfo.smiapp_profile = SMIAPP_PROFILE_2;
2565                 sensor->scaler = &sensor->ssds[sensor->ssds_used];
2566                 sensor->ssds_used++;
2567         } else if (sensor->limits[SMIAPP_LIMIT_DIGITAL_CROP_CAPABILITY]
2568                    == SMIAPP_DIGITAL_CROP_CAPABILITY_INPUT_CROP) {
2569                 sensor->scaler = &sensor->ssds[sensor->ssds_used];
2570                 sensor->ssds_used++;
2571         }
2572         sensor->binner = &sensor->ssds[sensor->ssds_used];
2573         sensor->ssds_used++;
2574         sensor->pixel_array = &sensor->ssds[sensor->ssds_used];
2575         sensor->ssds_used++;
2576
2577         sensor->scale_m = sensor->limits[SMIAPP_LIMIT_SCALER_N_MIN];
2578
2579         for (i = 0; i < SMIAPP_SUBDEVS; i++) {
2580                 struct {
2581                         struct smiapp_subdev *ssd;
2582                         char *name;
2583                 } const __this[] = {
2584                         { sensor->scaler, "scaler", },
2585                         { sensor->binner, "binner", },
2586                         { sensor->pixel_array, "pixel array", },
2587                 }, *_this = &__this[i];
2588                 struct smiapp_subdev *this = _this->ssd;
2589
2590                 if (!this)
2591                         continue;
2592
2593                 if (this != sensor->src)
2594                         v4l2_subdev_init(&this->sd, &smiapp_ops);
2595
2596                 this->sensor = sensor;
2597
2598                 if (this == sensor->pixel_array) {
2599                         this->npads = 1;
2600                 } else {
2601                         this->npads = 2;
2602                         this->source_pad = 1;
2603                 }
2604
2605                 snprintf(this->sd.name,
2606                          sizeof(this->sd.name), "%s %s %d-%4.4x",
2607                          sensor->minfo.name, _this->name,
2608                          i2c_adapter_id(client->adapter), client->addr);
2609
2610                 this->sink_fmt.width =
2611                         sensor->limits[SMIAPP_LIMIT_X_ADDR_MAX] + 1;
2612                 this->sink_fmt.height =
2613                         sensor->limits[SMIAPP_LIMIT_Y_ADDR_MAX] + 1;
2614                 this->compose.width = this->sink_fmt.width;
2615                 this->compose.height = this->sink_fmt.height;
2616                 this->crop[this->source_pad] = this->compose;
2617                 this->pads[this->source_pad].flags = MEDIA_PAD_FL_SOURCE;
2618                 if (this != sensor->pixel_array) {
2619                         this->crop[this->sink_pad] = this->compose;
2620                         this->pads[this->sink_pad].flags = MEDIA_PAD_FL_SINK;
2621                 }
2622
2623                 this->sd.entity.ops = &smiapp_entity_ops;
2624
2625                 if (last == NULL) {
2626                         last = this;
2627                         continue;
2628                 }
2629
2630                 this->sd.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
2631                 this->sd.internal_ops = &smiapp_internal_ops;
2632                 this->sd.owner = NULL;
2633                 v4l2_set_subdevdata(&this->sd, client);
2634
2635                 rval = media_entity_init(&this->sd.entity,
2636                                          this->npads, this->pads, 0);
2637                 if (rval) {
2638                         dev_err(&client->dev,
2639                                 "media_entity_init failed\n");
2640                         goto out_nvm_release;
2641                 }
2642
2643                 rval = media_entity_create_link(&this->sd.entity,
2644                                                 this->source_pad,
2645                                                 &last->sd.entity,
2646                                                 last->sink_pad,
2647                                                 MEDIA_LNK_FL_ENABLED |
2648                                                 MEDIA_LNK_FL_IMMUTABLE);
2649                 if (rval) {
2650                         dev_err(&client->dev,
2651                                 "media_entity_create_link failed\n");
2652                         goto out_nvm_release;
2653                 }
2654
2655                 rval = v4l2_device_register_subdev(sensor->src->sd.v4l2_dev,
2656                                                    &this->sd);
2657                 if (rval) {
2658                         dev_err(&client->dev,
2659                                 "v4l2_device_register_subdev failed\n");
2660                         goto out_nvm_release;
2661                 }
2662
2663                 last = this;
2664         }
2665
2666         dev_dbg(&client->dev, "profile %d\n", sensor->minfo.smiapp_profile);
2667
2668         sensor->pixel_array->sd.entity.type = MEDIA_ENT_T_V4L2_SUBDEV_SENSOR;
2669
2670         /* final steps */
2671         smiapp_read_frame_fmt(sensor);
2672         rval = smiapp_init_controls(sensor);
2673         if (rval < 0)
2674                 goto out_nvm_release;
2675
2676         /* prepare PLL configuration input values */
2677         pll->bus_type = SMIAPP_PLL_BUS_TYPE_CSI2;
2678         pll->csi2.lanes = sensor->platform_data->lanes;
2679         pll->ext_clk_freq_hz = sensor->platform_data->ext_clk;
2680         pll->flags = smiapp_call_quirk(sensor, pll_flags);
2681
2682         /* Profile 0 sensors have no separate OP clock branch. */
2683         if (sensor->minfo.smiapp_profile == SMIAPP_PROFILE_0)
2684                 pll->flags |= SMIAPP_PLL_FLAG_NO_OP_CLOCKS;
2685         pll->scale_n = sensor->limits[SMIAPP_LIMIT_SCALER_N_MIN];
2686
2687         rval = smiapp_update_mode(sensor);
2688         if (rval) {
2689                 dev_err(&client->dev, "update mode failed\n");
2690                 goto out_nvm_release;
2691         }
2692
2693         sensor->streaming = false;
2694         sensor->dev_init_done = true;
2695
2696         /* check flash capability */
2697         rval = smiapp_read(sensor, SMIAPP_REG_U8_FLASH_MODE_CAPABILITY, &tmp);
2698         sensor->flash_capability = tmp;
2699         if (rval)
2700                 goto out_nvm_release;
2701
2702         smiapp_power_off(sensor);
2703
2704         return 0;
2705
2706 out_nvm_release:
2707         device_remove_file(&client->dev, &dev_attr_nvm);
2708
2709 out_ident_release:
2710         device_remove_file(&client->dev, &dev_attr_ident);
2711
2712 out_power_off:
2713         smiapp_power_off(sensor);
2714         return rval;
2715 }
2716
2717 static int smiapp_open(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh)
2718 {
2719         struct smiapp_subdev *ssd = to_smiapp_subdev(sd);
2720         struct smiapp_sensor *sensor = ssd->sensor;
2721         u32 mbus_code =
2722                 smiapp_csi_data_formats[smiapp_pixel_order(sensor)].code;
2723         unsigned int i;
2724
2725         mutex_lock(&sensor->mutex);
2726
2727         for (i = 0; i < ssd->npads; i++) {
2728                 struct v4l2_mbus_framefmt *try_fmt =
2729                         v4l2_subdev_get_try_format(fh, i);
2730                 struct v4l2_rect *try_crop = v4l2_subdev_get_try_crop(fh, i);
2731                 struct v4l2_rect *try_comp;
2732
2733                 try_fmt->width = sensor->limits[SMIAPP_LIMIT_X_ADDR_MAX] + 1;
2734                 try_fmt->height = sensor->limits[SMIAPP_LIMIT_Y_ADDR_MAX] + 1;
2735                 try_fmt->code = mbus_code;
2736                 try_fmt->field = V4L2_FIELD_NONE;
2737
2738                 try_crop->top = 0;
2739                 try_crop->left = 0;
2740                 try_crop->width = try_fmt->width;
2741                 try_crop->height = try_fmt->height;
2742
2743                 if (ssd != sensor->pixel_array)
2744                         continue;
2745
2746                 try_comp = v4l2_subdev_get_try_compose(fh, i);
2747                 *try_comp = *try_crop;
2748         }
2749
2750         mutex_unlock(&sensor->mutex);
2751
2752         return smiapp_set_power(sd, 1);
2753 }
2754
2755 static int smiapp_close(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh)
2756 {
2757         return smiapp_set_power(sd, 0);
2758 }
2759
2760 static const struct v4l2_subdev_video_ops smiapp_video_ops = {
2761         .s_stream = smiapp_set_stream,
2762 };
2763
2764 static const struct v4l2_subdev_core_ops smiapp_core_ops = {
2765         .s_power = smiapp_set_power,
2766 };
2767
2768 static const struct v4l2_subdev_pad_ops smiapp_pad_ops = {
2769         .enum_mbus_code = smiapp_enum_mbus_code,
2770         .get_fmt = smiapp_get_format,
2771         .set_fmt = smiapp_set_format,
2772         .get_selection = smiapp_get_selection,
2773         .set_selection = smiapp_set_selection,
2774 };
2775
2776 static const struct v4l2_subdev_sensor_ops smiapp_sensor_ops = {
2777         .g_skip_frames = smiapp_get_skip_frames,
2778 };
2779
2780 static const struct v4l2_subdev_ops smiapp_ops = {
2781         .core = &smiapp_core_ops,
2782         .video = &smiapp_video_ops,
2783         .pad = &smiapp_pad_ops,
2784         .sensor = &smiapp_sensor_ops,
2785 };
2786
2787 static const struct media_entity_operations smiapp_entity_ops = {
2788         .link_validate = v4l2_subdev_link_validate,
2789 };
2790
2791 static const struct v4l2_subdev_internal_ops smiapp_internal_src_ops = {
2792         .registered = smiapp_registered,
2793         .open = smiapp_open,
2794         .close = smiapp_close,
2795 };
2796
2797 static const struct v4l2_subdev_internal_ops smiapp_internal_ops = {
2798         .open = smiapp_open,
2799         .close = smiapp_close,
2800 };
2801
2802 /* -----------------------------------------------------------------------------
2803  * I2C Driver
2804  */
2805
2806 #ifdef CONFIG_PM
2807
2808 static int smiapp_suspend(struct device *dev)
2809 {
2810         struct i2c_client *client = to_i2c_client(dev);
2811         struct v4l2_subdev *subdev = i2c_get_clientdata(client);
2812         struct smiapp_sensor *sensor = to_smiapp_sensor(subdev);
2813         bool streaming;
2814
2815         BUG_ON(mutex_is_locked(&sensor->mutex));
2816
2817         if (sensor->power_count == 0)
2818                 return 0;
2819
2820         if (sensor->streaming)
2821                 smiapp_stop_streaming(sensor);
2822
2823         streaming = sensor->streaming;
2824
2825         smiapp_power_off(sensor);
2826
2827         /* save state for resume */
2828         sensor->streaming = streaming;
2829
2830         return 0;
2831 }
2832
2833 static int smiapp_resume(struct device *dev)
2834 {
2835         struct i2c_client *client = to_i2c_client(dev);
2836         struct v4l2_subdev *subdev = i2c_get_clientdata(client);
2837         struct smiapp_sensor *sensor = to_smiapp_sensor(subdev);
2838         int rval;
2839
2840         if (sensor->power_count == 0)
2841                 return 0;
2842
2843         rval = smiapp_power_on(sensor);
2844         if (rval)
2845                 return rval;
2846
2847         if (sensor->streaming)
2848                 rval = smiapp_start_streaming(sensor);
2849
2850         return rval;
2851 }
2852
2853 #else
2854
2855 #define smiapp_suspend  NULL
2856 #define smiapp_resume   NULL
2857
2858 #endif /* CONFIG_PM */
2859
2860 static int smiapp_probe(struct i2c_client *client,
2861                         const struct i2c_device_id *devid)
2862 {
2863         struct smiapp_sensor *sensor;
2864
2865         if (client->dev.platform_data == NULL)
2866                 return -ENODEV;
2867
2868         sensor = devm_kzalloc(&client->dev, sizeof(*sensor), GFP_KERNEL);
2869         if (sensor == NULL)
2870                 return -ENOMEM;
2871
2872         sensor->platform_data = client->dev.platform_data;
2873         mutex_init(&sensor->mutex);
2874         mutex_init(&sensor->power_mutex);
2875         sensor->src = &sensor->ssds[sensor->ssds_used];
2876
2877         v4l2_i2c_subdev_init(&sensor->src->sd, client, &smiapp_ops);
2878         sensor->src->sd.internal_ops = &smiapp_internal_src_ops;
2879         sensor->src->sd.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
2880         sensor->src->sensor = sensor;
2881
2882         sensor->src->pads[0].flags = MEDIA_PAD_FL_SOURCE;
2883         return media_entity_init(&sensor->src->sd.entity, 2,
2884                                  sensor->src->pads, 0);
2885 }
2886
2887 static int smiapp_remove(struct i2c_client *client)
2888 {
2889         struct v4l2_subdev *subdev = i2c_get_clientdata(client);
2890         struct smiapp_sensor *sensor = to_smiapp_sensor(subdev);
2891         unsigned int i;
2892
2893         if (sensor->power_count) {
2894                 if (gpio_is_valid(sensor->platform_data->xshutdown))
2895                         gpio_set_value(sensor->platform_data->xshutdown, 0);
2896                 if (sensor->platform_data->set_xclk)
2897                         sensor->platform_data->set_xclk(&sensor->src->sd, 0);
2898                 else
2899                         clk_disable_unprepare(sensor->ext_clk);
2900                 sensor->power_count = 0;
2901         }
2902
2903         device_remove_file(&client->dev, &dev_attr_ident);
2904         if (sensor->nvm)
2905                 device_remove_file(&client->dev, &dev_attr_nvm);
2906
2907         for (i = 0; i < sensor->ssds_used; i++) {
2908                 v4l2_device_unregister_subdev(&sensor->ssds[i].sd);
2909                 media_entity_cleanup(&sensor->ssds[i].sd.entity);
2910         }
2911         smiapp_free_controls(sensor);
2912
2913         return 0;
2914 }
2915
2916 static const struct i2c_device_id smiapp_id_table[] = {
2917         { SMIAPP_NAME, 0 },
2918         { },
2919 };
2920 MODULE_DEVICE_TABLE(i2c, smiapp_id_table);
2921
2922 static const struct dev_pm_ops smiapp_pm_ops = {
2923         .suspend        = smiapp_suspend,
2924         .resume         = smiapp_resume,
2925 };
2926
2927 static struct i2c_driver smiapp_i2c_driver = {
2928         .driver = {
2929                 .name = SMIAPP_NAME,
2930                 .pm = &smiapp_pm_ops,
2931         },
2932         .probe  = smiapp_probe,
2933         .remove = smiapp_remove,
2934         .id_table = smiapp_id_table,
2935 };
2936
2937 module_i2c_driver(smiapp_i2c_driver);
2938
2939 MODULE_AUTHOR("Sakari Ailus <sakari.ailus@iki.fi>");
2940 MODULE_DESCRIPTION("Generic SMIA/SMIA++ camera module driver");
2941 MODULE_LICENSE("GPL");