drivers/staging/media/davinci_vpfe/dm365_ipipeif.c

   1 /*
   2  * Copyright (C) 2012 Texas Instruments Inc
   3  *
   4  * This program is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU General Public License as
   6  * published by the Free Software Foundation version 2.
   7  *
   8  * This program is distributed in the hope that it will be useful,
   9  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  11  * GNU General Public License for more details.
  12  *
  13  * You should have received a copy of the GNU General Public License
  14  * along with this program; if not, write to the Free Software
  15  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
  16  *
  17  * Contributors:
  18  *      Manjunath Hadli <manjunath.hadli@ti.com>
  19  *      Prabhakar Lad <prabhakar.lad@ti.com>
  20  */
  21
  22 #include "dm365_ipipeif.h"
  23 #include "vpfe_mc_capture.h"
  24
  25 static const unsigned int ipipeif_input_fmts[] = {
  26         MEDIA_BUS_FMT_UYVY8_2X8,
  27         MEDIA_BUS_FMT_SGRBG12_1X12,
  28         MEDIA_BUS_FMT_Y8_1X8,
  29         MEDIA_BUS_FMT_UV8_1X8,
  30         MEDIA_BUS_FMT_YDYUYDYV8_1X16,
  31         MEDIA_BUS_FMT_SBGGR8_1X8,
  32 };
  33
  34 static const unsigned int ipipeif_output_fmts[] = {
  35         MEDIA_BUS_FMT_UYVY8_2X8,
  36         MEDIA_BUS_FMT_SGRBG12_1X12,
  37         MEDIA_BUS_FMT_Y8_1X8,
  38         MEDIA_BUS_FMT_UV8_1X8,
  39         MEDIA_BUS_FMT_YDYUYDYV8_1X16,
  40         MEDIA_BUS_FMT_SBGGR8_1X8,
  41         MEDIA_BUS_FMT_SGRBG10_DPCM8_1X8,
  42         MEDIA_BUS_FMT_SGRBG10_ALAW8_1X8,
  43 };
  44
  45 static int
  46 ipipeif_get_pack_mode(u32 in_pix_fmt)
  47 {
  48         switch (in_pix_fmt) {
  49         case MEDIA_BUS_FMT_SBGGR8_1X8:
  50         case MEDIA_BUS_FMT_Y8_1X8:
  51         case MEDIA_BUS_FMT_SGRBG10_DPCM8_1X8:
  52         case MEDIA_BUS_FMT_UV8_1X8:
  53                 return IPIPEIF_5_1_PACK_8_BIT;
  54
  55         case MEDIA_BUS_FMT_SGRBG10_ALAW8_1X8:
  56                 return IPIPEIF_5_1_PACK_8_BIT_A_LAW;
  57
  58         case MEDIA_BUS_FMT_SGRBG12_1X12:
  59                 return IPIPEIF_5_1_PACK_16_BIT;
  60
  61         case MEDIA_BUS_FMT_SBGGR12_1X12:
  62                 return IPIPEIF_5_1_PACK_12_BIT;
  63
  64         default:
  65                 return IPIPEIF_5_1_PACK_16_BIT;
  66         }
  67 }
  68
  69 static inline u32 ipipeif_read(void *addr, u32 offset)
  70 {
  71         return readl(addr + offset);
  72 }
  73
  74 static inline void ipipeif_write(u32 val, void *addr, u32 offset)
  75 {
  76         writel(val, addr + offset);
  77 }
  78
  79 static void ipipeif_config_dpc(void *addr, struct ipipeif_dpc *dpc)
  80 {
  81         u32 val = 0;
  82
  83         if (dpc->en) {
  84                 val = (dpc->en & 1) << IPIPEIF_DPC2_EN_SHIFT;
  85                 val |= dpc->thr & IPIPEIF_DPC2_THR_MASK;
  86         }
  87         ipipeif_write(val, addr, IPIPEIF_DPC2);
  88 }
  89
  90 #define IPIPEIF_MODE_CONTINUOUS                 0
  91 #define IPIPEIF_MODE_ONE_SHOT                   1
  92
  93 static int get_oneshot_mode(enum ipipeif_input_entity input)
  94 {
  95         if (input == IPIPEIF_INPUT_MEMORY)
  96                 return IPIPEIF_MODE_ONE_SHOT;
  97         else if (input == IPIPEIF_INPUT_ISIF)
  98                 return IPIPEIF_MODE_CONTINUOUS;
  99
 100         return -EINVAL;
 101 }
 102
 103 static int
 104 ipipeif_get_cfg_src1(struct vpfe_ipipeif_device *ipipeif)
 105 {
 106         struct v4l2_mbus_framefmt *informat;
 107
 108         informat = &ipipeif->formats[IPIPEIF_PAD_SINK];
 109         if (ipipeif->input == IPIPEIF_INPUT_MEMORY &&
 110            (informat->code == MEDIA_BUS_FMT_Y8_1X8 ||
 111             informat->code == MEDIA_BUS_FMT_UV8_1X8))
 112                 return IPIPEIF_CCDC;
 113
 114         return IPIPEIF_SRC1_PARALLEL_PORT;
 115 }
 116
 117 static int
 118 ipipeif_get_data_shift(struct vpfe_ipipeif_device *ipipeif)
 119 {
 120         struct v4l2_mbus_framefmt *informat;
 121
 122         informat = &ipipeif->formats[IPIPEIF_PAD_SINK];
 123
 124         switch (informat->code) {
 125         case MEDIA_BUS_FMT_SGRBG12_1X12:
 126                 return IPIPEIF_5_1_BITS11_0;
 127
 128         case MEDIA_BUS_FMT_Y8_1X8:
 129         case MEDIA_BUS_FMT_UV8_1X8:
 130                 return IPIPEIF_5_1_BITS11_0;
 131
 132         default:
 133                 return IPIPEIF_5_1_BITS7_0;
 134         }
 135 }
 136
 137 static enum ipipeif_input_source
 138 ipipeif_get_source(struct vpfe_ipipeif_device *ipipeif)
 139 {
 140         struct v4l2_mbus_framefmt *informat;
 141
 142         informat = &ipipeif->formats[IPIPEIF_PAD_SINK];
 143         if (ipipeif->input == IPIPEIF_INPUT_ISIF)
 144                 return IPIPEIF_CCDC;
 145
 146         if (informat->code == MEDIA_BUS_FMT_UYVY8_2X8)
 147                 return IPIPEIF_SDRAM_YUV;
 148
 149         return IPIPEIF_SDRAM_RAW;
 150 }
 151
 152 void vpfe_ipipeif_ss_buffer_isr(struct vpfe_ipipeif_device *ipipeif)
 153 {
 154         struct vpfe_video_device *video_in = &ipipeif->video_in;
 155
 156         if (ipipeif->input != IPIPEIF_INPUT_MEMORY)
 157                 return;
 158
 159         spin_lock(&video_in->dma_queue_lock);
 160         vpfe_video_process_buffer_complete(video_in);
 161         video_in->state = VPFE_VIDEO_BUFFER_NOT_QUEUED;
 162         vpfe_video_schedule_next_buffer(video_in);
 163         spin_unlock(&video_in->dma_queue_lock);
 164 }
 165
 166 int vpfe_ipipeif_decimation_enabled(struct vpfe_device *vpfe_dev)
 167 {
 168         struct vpfe_ipipeif_device *ipipeif = &vpfe_dev->vpfe_ipipeif;
 169
 170         return ipipeif->config.decimation;
 171 }
 172
 173 int vpfe_ipipeif_get_rsz(struct vpfe_device *vpfe_dev)
 174 {
 175         struct vpfe_ipipeif_device *ipipeif = &vpfe_dev->vpfe_ipipeif;
 176
 177         return ipipeif->config.rsz;
 178 }
 179
 180 #define RD_DATA_15_2            0x7
 181
 182 /*
 183  * ipipeif_hw_setup() - This function sets up IPIPEIF
 184  * @sd: pointer to v4l2 subdev structure
 185  * return -EINVAL or zero on success
 186  */
 187 static int ipipeif_hw_setup(struct v4l2_subdev *sd)
 188 {
 189         struct vpfe_ipipeif_device *ipipeif = v4l2_get_subdevdata(sd);
 190         struct v4l2_mbus_framefmt *informat, *outformat;
 191         struct ipipeif_params params = ipipeif->config;
 192         enum ipipeif_input_source ipipeif_source;
 193         u32 isif_port_if;
 194         void *ipipeif_base_addr;
 195         unsigned int val;
 196         int data_shift;
 197         int pack_mode;
 198         int source1;
 199         int tmp;
 200
 201         ipipeif_base_addr = ipipeif->ipipeif_base_addr;
 202
 203         /* Enable clock to IPIPEIF and IPIPE */
 204         vpss_enable_clock(VPSS_IPIPEIF_CLOCK, 1);
 205
 206         informat = &ipipeif->formats[IPIPEIF_PAD_SINK];
 207         outformat = &ipipeif->formats[IPIPEIF_PAD_SOURCE];
 208
 209         /* Combine all the fields to make CFG1 register of IPIPEIF */
 210         tmp = val = get_oneshot_mode(ipipeif->input);
 211         if (tmp < 0) {
 212                 dev_err(&sd->devnode->dev, "ipipeif: links setup required");
 213                 return -EINVAL;
 214         }
 215         val <<= ONESHOT_SHIFT;
 216
 217         ipipeif_source = ipipeif_get_source(ipipeif);
 218         val |= ipipeif_source << INPSRC_SHIFT;
 219
 220         val |= params.clock_select << CLKSEL_SHIFT;
 221         val |= params.avg_filter << AVGFILT_SHIFT;
 222         val |= params.decimation << DECIM_SHIFT;
 223
 224         pack_mode = ipipeif_get_pack_mode(informat->code);
 225         val |= pack_mode << PACK8IN_SHIFT;
 226
 227         source1 = ipipeif_get_cfg_src1(ipipeif);
 228         val |= source1 << INPSRC1_SHIFT;
 229
 230         data_shift = ipipeif_get_data_shift(ipipeif);
 231         if (ipipeif_source != IPIPEIF_SDRAM_YUV)
 232                 val |= data_shift << DATASFT_SHIFT;
 233         else
 234                 val &= ~(RD_DATA_15_2 << DATASFT_SHIFT);
 235
 236         ipipeif_write(val, ipipeif_base_addr, IPIPEIF_CFG1);
 237
 238         switch (ipipeif_source) {
 239         case IPIPEIF_CCDC:
 240                 ipipeif_write(ipipeif->gain, ipipeif_base_addr, IPIPEIF_GAIN);
 241                 break;
 242
 243         case IPIPEIF_SDRAM_RAW:
 244         case IPIPEIF_CCDC_DARKFM:
 245                 ipipeif_write(ipipeif->gain, ipipeif_base_addr, IPIPEIF_GAIN);
 246                 /* fall through */
 247         case IPIPEIF_SDRAM_YUV:
 248                 val |= data_shift << DATASFT_SHIFT;
 249                 ipipeif_write(params.ppln, ipipeif_base_addr, IPIPEIF_PPLN);
 250                 ipipeif_write(params.lpfr, ipipeif_base_addr, IPIPEIF_LPFR);
 251                 ipipeif_write(informat->width, ipipeif_base_addr, IPIPEIF_HNUM);
 252                 ipipeif_write(informat->height,
 253                               ipipeif_base_addr, IPIPEIF_VNUM);
 254                 break;
 255
 256         default:
 257                 return -EINVAL;
 258         }
 259
 260         /*check if decimation is enable or not */
 261         if (params.decimation)
 262                 ipipeif_write(params.rsz, ipipeif_base_addr, IPIPEIF_RSZ);
 263
 264         /* Setup sync alignment and initial rsz position */
 265         val = params.if_5_1.align_sync & 1;
 266         val <<= IPIPEIF_INIRSZ_ALNSYNC_SHIFT;
 267         val |= params.if_5_1.rsz_start & IPIPEIF_INIRSZ_MASK;
 268         ipipeif_write(val, ipipeif_base_addr, IPIPEIF_INIRSZ);
 269         isif_port_if = informat->code;
 270
 271         if (isif_port_if == MEDIA_BUS_FMT_Y8_1X8)
 272                 isif_port_if = MEDIA_BUS_FMT_YUYV8_1X16;
 273         else if (isif_port_if == MEDIA_BUS_FMT_UV8_1X8)
 274                 isif_port_if = MEDIA_BUS_FMT_SGRBG12_1X12;
 275
 276         /* Enable DPCM decompression */
 277         switch (ipipeif_source) {
 278         case IPIPEIF_SDRAM_RAW:
 279                 val = 0;
 280                 if (outformat->code == MEDIA_BUS_FMT_SGRBG10_DPCM8_1X8) {
 281                         val = 1;
 282                         val |= (IPIPEIF_DPCM_8BIT_10BIT & 1) <<
 283                                 IPIPEIF_DPCM_BITS_SHIFT;
 284                         val |= (ipipeif->dpcm_predictor & 1) <<
 285                                 IPIPEIF_DPCM_PRED_SHIFT;
 286                 }
 287                 ipipeif_write(val, ipipeif_base_addr, IPIPEIF_DPCM);
 288
 289                 /* set DPC */
 290                 ipipeif_config_dpc(ipipeif_base_addr, &params.if_5_1.dpc);
 291
 292                 ipipeif_write(params.if_5_1.clip,
 293                               ipipeif_base_addr, IPIPEIF_OCLIP);
 294
 295                 /* fall through for SDRAM YUV mode */
 296                 /* configure CFG2 */
 297                 val = ipipeif_read(ipipeif_base_addr, IPIPEIF_CFG2);
 298                 switch (isif_port_if) {
 299                 case MEDIA_BUS_FMT_YUYV8_1X16:
 300                 case MEDIA_BUS_FMT_UYVY8_2X8:
 301                 case MEDIA_BUS_FMT_Y8_1X8:
 302                         RESETBIT(val, IPIPEIF_CFG2_YUV8_SHIFT);
 303                         SETBIT(val, IPIPEIF_CFG2_YUV16_SHIFT);
 304                         ipipeif_write(val, ipipeif_base_addr, IPIPEIF_CFG2);
 305                         break;
 306
 307                 default:
 308                         RESETBIT(val, IPIPEIF_CFG2_YUV8_SHIFT);
 309                         RESETBIT(val, IPIPEIF_CFG2_YUV16_SHIFT);
 310                         ipipeif_write(val, ipipeif_base_addr, IPIPEIF_CFG2);
 311                         break;
 312                 }
 313
 314         case IPIPEIF_SDRAM_YUV:
 315                 /* Set clock divider */
 316                 if (params.clock_select == IPIPEIF_SDRAM_CLK) {
 317                         val = ipipeif_read(ipipeif_base_addr, IPIPEIF_CLKDIV);
 318                         val |= (params.if_5_1.clk_div.m - 1) <<
 319                                 IPIPEIF_CLKDIV_M_SHIFT;
 320                         val |= (params.if_5_1.clk_div.n - 1);
 321                         ipipeif_write(val, ipipeif_base_addr, IPIPEIF_CLKDIV);
 322                 }
 323                 break;
 324
 325         case IPIPEIF_CCDC:
 326         case IPIPEIF_CCDC_DARKFM:
 327                 /* set DPC */
 328                 ipipeif_config_dpc(ipipeif_base_addr, &params.if_5_1.dpc);
 329
 330                 /* Set DF gain & threshold control */
 331                 val = 0;
 332                 if (params.if_5_1.df_gain_en) {
 333                         val = params.if_5_1.df_gain_thr &
 334                                 IPIPEIF_DF_GAIN_THR_MASK;
 335                         ipipeif_write(val, ipipeif_base_addr, IPIPEIF_DFSGTH);
 336                         val = (params.if_5_1.df_gain_en & 1) <<
 337                                 IPIPEIF_DF_GAIN_EN_SHIFT;
 338                         val |= params.if_5_1.df_gain &
 339                                 IPIPEIF_DF_GAIN_MASK;
 340                 }
 341                 ipipeif_write(val, ipipeif_base_addr, IPIPEIF_DFSGVL);
 342                 /* configure CFG2 */
 343                 val = VPFE_PINPOL_POSITIVE << IPIPEIF_CFG2_HDPOL_SHIFT;
 344                 val |= VPFE_PINPOL_POSITIVE << IPIPEIF_CFG2_VDPOL_SHIFT;
 345
 346                 switch (isif_port_if) {
 347                 case MEDIA_BUS_FMT_YUYV8_1X16:
 348                 case MEDIA_BUS_FMT_YUYV10_1X20:
 349                         RESETBIT(val, IPIPEIF_CFG2_YUV8_SHIFT);
 350                         SETBIT(val, IPIPEIF_CFG2_YUV16_SHIFT);
 351                         break;
 352
 353                 case MEDIA_BUS_FMT_YUYV8_2X8:
 354                 case MEDIA_BUS_FMT_UYVY8_2X8:
 355                 case MEDIA_BUS_FMT_Y8_1X8:
 356                 case MEDIA_BUS_FMT_YUYV10_2X10:
 357                         SETBIT(val, IPIPEIF_CFG2_YUV8_SHIFT);
 358                         SETBIT(val, IPIPEIF_CFG2_YUV16_SHIFT);
 359                         val |= IPIPEIF_CBCR_Y << IPIPEIF_CFG2_YUV8P_SHIFT;
 360                         break;
 361
 362                 default:
 363                         /* Bayer */
 364                         ipipeif_write(params.if_5_1.clip, ipipeif_base_addr,
 365                                 IPIPEIF_OCLIP);
 366                 }
 367                 ipipeif_write(val, ipipeif_base_addr, IPIPEIF_CFG2);
 368                 break;
 369
 370         default:
 371                 return -EINVAL;
 372         }
 373
 374         return 0;
 375 }
 376
 377 static int
 378 ipipeif_set_config(struct v4l2_subdev *sd, struct ipipeif_params *config)
 379 {
 380         struct vpfe_ipipeif_device *ipipeif = v4l2_get_subdevdata(sd);
 381         struct device *dev = ipipeif->subdev.v4l2_dev->dev;
 382
 383         if (!config) {
 384                 dev_err(dev, "Invalid configuration pointer\n");
 385                 return -EINVAL;
 386         }
 387
 388         ipipeif->config.clock_select = config->clock_select;
 389         ipipeif->config.ppln = config->ppln;
 390         ipipeif->config.lpfr = config->lpfr;
 391         ipipeif->config.rsz = config->rsz;
 392         ipipeif->config.decimation = config->decimation;
 393         if (ipipeif->config.decimation &&
 394            (ipipeif->config.rsz < IPIPEIF_RSZ_MIN ||
 395             ipipeif->config.rsz > IPIPEIF_RSZ_MAX)) {
 396                 dev_err(dev, "rsz range is %d to %d\n",
 397                         IPIPEIF_RSZ_MIN, IPIPEIF_RSZ_MAX);
 398                 return -EINVAL;
 399         }
 400
 401         ipipeif->config.avg_filter = config->avg_filter;
 402
 403         ipipeif->config.if_5_1.df_gain_thr = config->if_5_1.df_gain_thr;
 404         ipipeif->config.if_5_1.df_gain = config->if_5_1.df_gain;
 405         ipipeif->config.if_5_1.df_gain_en = config->if_5_1.df_gain_en;
 406
 407         ipipeif->config.if_5_1.rsz_start = config->if_5_1.rsz_start;
 408         ipipeif->config.if_5_1.align_sync = config->if_5_1.align_sync;
 409         ipipeif->config.if_5_1.clip = config->if_5_1.clip;
 410
 411         ipipeif->config.if_5_1.dpc.en = config->if_5_1.dpc.en;
 412         ipipeif->config.if_5_1.dpc.thr = config->if_5_1.dpc.thr;
 413
 414         ipipeif->config.if_5_1.clk_div.m = config->if_5_1.clk_div.m;
 415         ipipeif->config.if_5_1.clk_div.n = config->if_5_1.clk_div.n;
 416
 417         return 0;
 418 }
 419
 420 static int
 421 ipipeif_get_config(struct v4l2_subdev *sd, void __user *arg)
 422 {
 423         struct vpfe_ipipeif_device *ipipeif = v4l2_get_subdevdata(sd);
 424         struct ipipeif_params *config = arg;
 425         struct device *dev = ipipeif->subdev.v4l2_dev->dev;
 426
 427         if (!arg) {
 428                 dev_err(dev, "Invalid configuration pointer\n");
 429                 return -EINVAL;
 430         }
 431
 432         config->clock_select = ipipeif->config.clock_select;
 433         config->ppln = ipipeif->config.ppln;
 434         config->lpfr = ipipeif->config.lpfr;
 435         config->rsz = ipipeif->config.rsz;
 436         config->decimation = ipipeif->config.decimation;
 437         config->avg_filter = ipipeif->config.avg_filter;
 438
 439         config->if_5_1.df_gain_thr = ipipeif->config.if_5_1.df_gain_thr;
 440         config->if_5_1.df_gain = ipipeif->config.if_5_1.df_gain;
 441         config->if_5_1.df_gain_en = ipipeif->config.if_5_1.df_gain_en;
 442
 443         config->if_5_1.rsz_start = ipipeif->config.if_5_1.rsz_start;
 444         config->if_5_1.align_sync = ipipeif->config.if_5_1.align_sync;
 445         config->if_5_1.clip = ipipeif->config.if_5_1.clip;
 446
 447         config->if_5_1.dpc.en = ipipeif->config.if_5_1.dpc.en;
 448         config->if_5_1.dpc.thr = ipipeif->config.if_5_1.dpc.thr;
 449
 450         config->if_5_1.clk_div.m = ipipeif->config.if_5_1.clk_div.m;
 451         config->if_5_1.clk_div.n = ipipeif->config.if_5_1.clk_div.n;
 452
 453         return 0;
 454 }
 455
 456 /*
 457  * ipipeif_ioctl() - Handle ipipeif module private ioctl's
 458  * @sd: pointer to v4l2 subdev structure
 459  * @cmd: configuration command
 460  * @arg: configuration argument
 461  */
 462 static long ipipeif_ioctl(struct v4l2_subdev *sd,
 463                           unsigned int cmd, void *arg)
 464 {
 465         struct ipipeif_params *config = arg;
 466         int ret = -ENOIOCTLCMD;
 467
 468         switch (cmd) {
 469         case VIDIOC_VPFE_IPIPEIF_S_CONFIG:
 470                 ret = ipipeif_set_config(sd, config);
 471                 break;
 472
 473         case VIDIOC_VPFE_IPIPEIF_G_CONFIG:
 474                 ret = ipipeif_get_config(sd, arg);
 475                 break;
 476         }
 477         return ret;
 478 }
 479
 480 /*
 481  * ipipeif_s_ctrl() - Handle set control subdev method
 482  * @ctrl: pointer to v4l2 control structure
 483  */
 484 static int ipipeif_s_ctrl(struct v4l2_ctrl *ctrl)
 485 {
 486         struct vpfe_ipipeif_device *ipipeif =
 487                 container_of(ctrl->handler, struct vpfe_ipipeif_device, ctrls);
 488
 489         switch (ctrl->id) {
 490         case VPFE_CID_DPCM_PREDICTOR:
 491                 ipipeif->dpcm_predictor = ctrl->val;
 492                 break;
 493
 494         case V4L2_CID_GAIN:
 495                 ipipeif->gain = ctrl->val;
 496                 break;
 497
 498         default:
 499                 return -EINVAL;
 500         }
 501
 502         return 0;
 503 }
 504
 505 #define ENABLE_IPIPEIF          0x1
 506
 507 void vpfe_ipipeif_enable(struct vpfe_device *vpfe_dev)
 508 {
 509         struct vpfe_ipipeif_device *ipipeif = &vpfe_dev->vpfe_ipipeif;
 510         void *ipipeif_base_addr = ipipeif->ipipeif_base_addr;
 511         unsigned char val;
 512
 513         if (ipipeif->input != IPIPEIF_INPUT_MEMORY)
 514                 return;
 515
 516         do {
 517                 val = ipipeif_read(ipipeif_base_addr, IPIPEIF_ENABLE);
 518         } while (val & 0x1);
 519
 520         ipipeif_write(ENABLE_IPIPEIF, ipipeif_base_addr, IPIPEIF_ENABLE);
 521 }
 522
 523 /*
 524  * ipipeif_set_stream() - Enable/Disable streaming on ipipeif subdev
 525  * @sd: pointer to v4l2 subdev structure
 526  * @enable: 1 == Enable, 0 == Disable
 527  */
 528 static int ipipeif_set_stream(struct v4l2_subdev *sd, int enable)
 529 {
 530         struct vpfe_ipipeif_device *ipipeif = v4l2_get_subdevdata(sd);
 531         struct vpfe_device *vpfe_dev = to_vpfe_device(ipipeif);
 532         int ret = 0;
 533
 534         if (!enable)
 535                 return ret;
 536
 537         ret = ipipeif_hw_setup(sd);
 538         if (!ret)
 539                 vpfe_ipipeif_enable(vpfe_dev);
 540
 541         return ret;
 542 }
 543
 544 /*
 545  * ipipeif_enum_mbus_code() - Handle pixel format enumeration
 546  * @sd: pointer to v4l2 subdev structure
 547  * @cfg: V4L2 subdev pad config
 548  * @code: pointer to v4l2_subdev_mbus_code_enum structure
 549  * return -EINVAL or zero on success
 550  */
 551 static int ipipeif_enum_mbus_code(struct v4l2_subdev *sd,
 552                                   struct v4l2_subdev_pad_config *cfg,
 553                         struct v4l2_subdev_mbus_code_enum *code)
 554 {
 555         switch (code->pad) {
 556         case IPIPEIF_PAD_SINK:
 557                 if (code->index >= ARRAY_SIZE(ipipeif_input_fmts))
 558                         return -EINVAL;
 559
 560                 code->code = ipipeif_input_fmts[code->index];
 561                 break;
 562
 563         case IPIPEIF_PAD_SOURCE:
 564                 if (code->index >= ARRAY_SIZE(ipipeif_output_fmts))
 565                         return -EINVAL;
 566
 567                 code->code = ipipeif_output_fmts[code->index];
 568                 break;
 569
 570         default:
 571                 return -EINVAL;
 572         }
 573
 574         return 0;
 575 }
 576
 577 /*
 578  * ipipeif_get_format() - Handle get format by pads subdev method
 579  * @sd: pointer to v4l2 subdev structure
 580  * @cfg: V4L2 subdev pad config
 581  * @fmt: pointer to v4l2 subdev format structure
 582  */
 583 static int
 584 ipipeif_get_format(struct v4l2_subdev *sd, struct v4l2_subdev_pad_config *cfg,
 585                 struct v4l2_subdev_format *fmt)
 586 {
 587         struct vpfe_ipipeif_device *ipipeif = v4l2_get_subdevdata(sd);
 588
 589         if (fmt->which == V4L2_SUBDEV_FORMAT_ACTIVE)
 590                 fmt->format = ipipeif->formats[fmt->pad];
 591         else
 592                 fmt->format = *(v4l2_subdev_get_try_format(sd, cfg, fmt->pad));
 593
 594         return 0;
 595 }
 596
 597 #define MIN_OUT_WIDTH                   32
 598 #define MIN_OUT_HEIGHT                  32
 599
 600 /*
 601  * ipipeif_try_format() - Handle try format by pad subdev method
 602  * @ipipeif: VPFE ipipeif device.
 603  * @cfg: V4L2 subdev pad config
 604  * @pad: pad num.
 605  * @fmt: pointer to v4l2 format structure.
 606  * @which : wanted subdev format
 607  */
 608 static void
 609 ipipeif_try_format(struct vpfe_ipipeif_device *ipipeif,
 610                    struct v4l2_subdev_pad_config *cfg, unsigned int pad,
 611                    struct v4l2_mbus_framefmt *fmt,
 612                    enum v4l2_subdev_format_whence which)
 613 {
 614         unsigned int max_out_height;
 615         unsigned int max_out_width;
 616         unsigned int i;
 617
 618         max_out_width = IPIPE_MAX_OUTPUT_WIDTH_A;
 619         max_out_height = IPIPE_MAX_OUTPUT_HEIGHT_A;
 620
 621         if (pad == IPIPEIF_PAD_SINK) {
 622                 for (i = 0; i < ARRAY_SIZE(ipipeif_input_fmts); i++)
 623                         if (fmt->code == ipipeif_input_fmts[i])
 624                                 break;
 625
 626                 /* If not found, use SBGGR10 as default */
 627                 if (i >= ARRAY_SIZE(ipipeif_input_fmts))
 628                         fmt->code = MEDIA_BUS_FMT_SGRBG12_1X12;
 629         } else if (pad == IPIPEIF_PAD_SOURCE) {
 630                 for (i = 0; i < ARRAY_SIZE(ipipeif_output_fmts); i++)
 631                         if (fmt->code == ipipeif_output_fmts[i])
 632                                 break;
 633
 634                 /* If not found, use UYVY as default */
 635                 if (i >= ARRAY_SIZE(ipipeif_output_fmts))
 636                         fmt->code = MEDIA_BUS_FMT_UYVY8_2X8;
 637         }
 638
 639         fmt->width = clamp_t(u32, fmt->width, MIN_OUT_HEIGHT, max_out_width);
 640         fmt->height = clamp_t(u32, fmt->height, MIN_OUT_WIDTH, max_out_height);
 641 }
 642
 643 static int
 644 ipipeif_enum_frame_size(struct v4l2_subdev *sd, struct v4l2_subdev_pad_config *cfg,
 645                      struct v4l2_subdev_frame_size_enum *fse)
 646 {
 647         struct vpfe_ipipeif_device *ipipeif = v4l2_get_subdevdata(sd);
 648         struct v4l2_mbus_framefmt format;
 649
 650         if (fse->index != 0)
 651                 return -EINVAL;
 652
 653         format.code = fse->code;
 654         format.width = 1;
 655         format.height = 1;
 656         ipipeif_try_format(ipipeif, cfg, fse->pad, &format, fse->which);
 657         fse->min_width = format.width;
 658         fse->min_height = format.height;
 659
 660         if (format.code != fse->code)
 661                 return -EINVAL;
 662
 663         format.code = fse->code;
 664         format.width = -1;
 665         format.height = -1;
 666         ipipeif_try_format(ipipeif, cfg, fse->pad, &format, fse->which);
 667         fse->max_width = format.width;
 668         fse->max_height = format.height;
 669
 670         return 0;
 671 }
 672
 673 /*
 674  * __ipipeif_get_format() - helper function for getting ipipeif format
 675  * @ipipeif: pointer to ipipeif private structure.
 676  * @cfg: V4L2 subdev pad config
 677  * @pad: pad number.
 678  * @which: wanted subdev format.
 679  *
 680  */
 681 static struct v4l2_mbus_framefmt *
 682 __ipipeif_get_format(struct vpfe_ipipeif_device *ipipeif,
 683                        struct v4l2_subdev_pad_config *cfg, unsigned int pad,
 684                        enum v4l2_subdev_format_whence which)
 685 {
 686         if (which == V4L2_SUBDEV_FORMAT_TRY)
 687                 return v4l2_subdev_get_try_format(&ipipeif->subdev, cfg, pad);
 688
 689         return &ipipeif->formats[pad];
 690 }
 691
 692 /*
 693  * ipipeif_set_format() - Handle set format by pads subdev method
 694  * @sd: pointer to v4l2 subdev structure
 695  * @cfg: V4L2 subdev pad config
 696  * @fmt: pointer to v4l2 subdev format structure
 697  * return -EINVAL or zero on success
 698  */
 699 static int
 700 ipipeif_set_format(struct v4l2_subdev *sd, struct v4l2_subdev_pad_config *cfg,
 701                 struct v4l2_subdev_format *fmt)
 702 {
 703         struct vpfe_ipipeif_device *ipipeif = v4l2_get_subdevdata(sd);
 704         struct v4l2_mbus_framefmt *format;
 705
 706         format = __ipipeif_get_format(ipipeif, cfg, fmt->pad, fmt->which);
 707         if (format == NULL)
 708                 return -EINVAL;
 709
 710         ipipeif_try_format(ipipeif, cfg, fmt->pad, &fmt->format, fmt->which);
 711         *format = fmt->format;
 712
 713         if (fmt->which == V4L2_SUBDEV_FORMAT_TRY)
 714                 return 0;
 715
 716         if (fmt->pad == IPIPEIF_PAD_SINK &&
 717             ipipeif->input != IPIPEIF_INPUT_NONE)
 718                 ipipeif->formats[fmt->pad] = fmt->format;
 719         else if (fmt->pad == IPIPEIF_PAD_SOURCE &&
 720                  ipipeif->output != IPIPEIF_OUTPUT_NONE)
 721                 ipipeif->formats[fmt->pad] = fmt->format;
 722         else
 723                 return -EINVAL;
 724
 725         return 0;
 726 }
 727
 728 static void ipipeif_set_default_config(struct vpfe_ipipeif_device *ipipeif)
 729 {
 730 #define WIDTH_I                 640
 731 #define HEIGHT_I                480
 732
 733         const struct ipipeif_params ipipeif_defaults = {
 734                 .clock_select = IPIPEIF_SDRAM_CLK,
 735                 .ppln = WIDTH_I + 8,
 736                 .lpfr = HEIGHT_I + 10,
 737                 .rsz = 16,      /* resize ratio 16/rsz */
 738                 .decimation = IPIPEIF_DECIMATION_OFF,
 739                 .avg_filter = IPIPEIF_AVG_OFF,
 740                 .if_5_1 = {
 741                         .clk_div = {
 742                                 .m = 1, /* clock = sdram clock * (m/n) */
 743                                 .n = 6
 744                         },
 745                         .clip = 4095,
 746                 },
 747         };
 748         memcpy(&ipipeif->config, &ipipeif_defaults,
 749                sizeof(struct ipipeif_params));
 750 }
 751
 752 /*
 753  * ipipeif_init_formats() - Initialize formats on all pads
 754  * @sd: VPFE ipipeif V4L2 subdevice
 755  * @fh: V4L2 subdev file handle
 756  *
 757  * Initialize all pad formats with default values. Try formats are initialized
 758  * on the file handle.
 759  */
 760 static int
 761 ipipeif_init_formats(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh)
 762 {
 763         struct vpfe_ipipeif_device *ipipeif = v4l2_get_subdevdata(sd);
 764         struct v4l2_subdev_format format;
 765
 766         memset(&format, 0, sizeof(format));
 767         format.pad = IPIPEIF_PAD_SINK;
 768         format.which = V4L2_SUBDEV_FORMAT_TRY;
 769         format.format.code = MEDIA_BUS_FMT_SGRBG12_1X12;
 770         format.format.width = IPIPE_MAX_OUTPUT_WIDTH_A;
 771         format.format.height = IPIPE_MAX_OUTPUT_HEIGHT_A;
 772         ipipeif_set_format(sd, fh->pad, &format);
 773
 774         memset(&format, 0, sizeof(format));
 775         format.pad = IPIPEIF_PAD_SOURCE;
 776         format.which = V4L2_SUBDEV_FORMAT_TRY;
 777         format.format.code = MEDIA_BUS_FMT_UYVY8_2X8;
 778         format.format.width = IPIPE_MAX_OUTPUT_WIDTH_A;
 779         format.format.height = IPIPE_MAX_OUTPUT_HEIGHT_A;
 780         ipipeif_set_format(sd, fh->pad, &format);
 781
 782         ipipeif_set_default_config(ipipeif);
 783
 784         return 0;
 785 }
 786
 787 /*
 788  * ipipeif_video_in_queue() - ipipeif video in queue
 789  * @vpfe_dev: vpfe device pointer
 790  * @addr: buffer address
 791  */
 792 static int
 793 ipipeif_video_in_queue(struct vpfe_device *vpfe_dev, unsigned long addr)
 794 {
 795         struct vpfe_ipipeif_device *ipipeif = &vpfe_dev->vpfe_ipipeif;
 796         void *ipipeif_base_addr = ipipeif->ipipeif_base_addr;
 797         unsigned int adofs;
 798         u32 val;
 799
 800         if (ipipeif->input != IPIPEIF_INPUT_MEMORY)
 801                 return -EINVAL;
 802
 803         switch (ipipeif->formats[IPIPEIF_PAD_SINK].code) {
 804         case MEDIA_BUS_FMT_Y8_1X8:
 805         case MEDIA_BUS_FMT_UV8_1X8:
 806         case MEDIA_BUS_FMT_YDYUYDYV8_1X16:
 807                 adofs = ipipeif->formats[IPIPEIF_PAD_SINK].width;
 808                 break;
 809
 810         default:
 811                 adofs = ipipeif->formats[IPIPEIF_PAD_SINK].width << 1;
 812                 break;
 813         }
 814
 815         /* adjust the line len to be a multiple of 32 */
 816         adofs += 31;
 817         adofs &= ~0x1f;
 818         val = (adofs >> 5) & IPIPEIF_ADOFS_LSB_MASK;
 819         ipipeif_write(val, ipipeif_base_addr, IPIPEIF_ADOFS);
 820
 821         /* lower sixteen bit */
 822         val = (addr >> IPIPEIF_ADDRL_SHIFT) & IPIPEIF_ADDRL_MASK;
 823         ipipeif_write(val, ipipeif_base_addr, IPIPEIF_ADDRL);
 824
 825         /* upper next seven bit */
 826         val = (addr >> IPIPEIF_ADDRU_SHIFT) & IPIPEIF_ADDRU_MASK;
 827         ipipeif_write(val, ipipeif_base_addr, IPIPEIF_ADDRU);
 828
 829         return 0;
 830 }
 831
 832 /* subdev core operations */
 833 static const struct v4l2_subdev_core_ops ipipeif_v4l2_core_ops = {
 834         .ioctl = ipipeif_ioctl,
 835 };
 836
 837 static const struct v4l2_ctrl_ops ipipeif_ctrl_ops = {
 838         .s_ctrl = ipipeif_s_ctrl,
 839 };
 840
 841 static const struct v4l2_ctrl_config vpfe_ipipeif_dpcm_pred = {
 842         .ops = &ipipeif_ctrl_ops,
 843         .id = VPFE_CID_DPCM_PREDICTOR,
 844         .name = "DPCM Predictor",
 845         .type = V4L2_CTRL_TYPE_INTEGER,
 846         .min = 0,
 847         .max = 1,
 848         .step = 1,
 849         .def = 0,
 850 };
 851
 852 /* subdev file operations */
 853 static const struct v4l2_subdev_internal_ops ipipeif_v4l2_internal_ops = {
 854         .open = ipipeif_init_formats,
 855 };
 856
 857 /* subdev video operations */
 858 static const struct v4l2_subdev_video_ops ipipeif_v4l2_video_ops = {
 859         .s_stream = ipipeif_set_stream,
 860 };
 861
 862 /* subdev pad operations */
 863 static const struct v4l2_subdev_pad_ops ipipeif_v4l2_pad_ops = {
 864         .enum_mbus_code = ipipeif_enum_mbus_code,
 865         .enum_frame_size = ipipeif_enum_frame_size,
 866         .get_fmt = ipipeif_get_format,
 867         .set_fmt = ipipeif_set_format,
 868 };
 869
 870 /* subdev operations */
 871 static const struct v4l2_subdev_ops ipipeif_v4l2_ops = {
 872         .core = &ipipeif_v4l2_core_ops,
 873         .video = &ipipeif_v4l2_video_ops,
 874         .pad = &ipipeif_v4l2_pad_ops,
 875 };
 876
 877 static const struct vpfe_video_operations video_in_ops = {
 878         .queue = ipipeif_video_in_queue,
 879 };
 880
 881 static int
 882 ipipeif_link_setup(struct media_entity *entity, const struct media_pad *local,
 883                 const struct media_pad *remote, u32 flags)
 884 {
 885         struct v4l2_subdev *sd = media_entity_to_v4l2_subdev(entity);
 886         struct vpfe_ipipeif_device *ipipeif = v4l2_get_subdevdata(sd);
 887         struct vpfe_device *vpfe = to_vpfe_device(ipipeif);
 888         int index = local->index;
 889
 890         /* FIXME: this is actually a hack! */
 891         if (is_media_entity_v4l2_subdev(remote->entity))
 892                 index |= 2 << 16;
 893
 894         switch (index) {
 895         case IPIPEIF_PAD_SINK:
 896                 /* Single shot mode */
 897                 if (!(flags & MEDIA_LNK_FL_ENABLED)) {
 898                         ipipeif->input = IPIPEIF_INPUT_NONE;
 899                         break;
 900                 }
 901                 ipipeif->input = IPIPEIF_INPUT_MEMORY;
 902                 break;
 903
 904         case IPIPEIF_PAD_SINK | 2 << 16:
 905                 /* read from isif */
 906                 if (!(flags & MEDIA_LNK_FL_ENABLED)) {
 907                         ipipeif->input = IPIPEIF_INPUT_NONE;
 908                         break;
 909                 }
 910                 if (ipipeif->input != IPIPEIF_INPUT_NONE)
 911                         return -EBUSY;
 912
 913                 ipipeif->input = IPIPEIF_INPUT_ISIF;
 914                 break;
 915
 916         case IPIPEIF_PAD_SOURCE | 2 << 16:
 917                 if (!(flags & MEDIA_LNK_FL_ENABLED)) {
 918                         ipipeif->output = IPIPEIF_OUTPUT_NONE;
 919                         break;
 920                 }
 921                 if (remote->entity == &vpfe->vpfe_ipipe.subdev.entity)
 922                         /* connencted to ipipe */
 923                         ipipeif->output = IPIPEIF_OUTPUT_IPIPE;
 924                 else if (remote->entity == &vpfe->vpfe_resizer.
 925                         crop_resizer.subdev.entity)
 926                         /* connected to resizer */
 927                         ipipeif->output = IPIPEIF_OUTPUT_RESIZER;
 928                 else
 929                         return -EINVAL;
 930                 break;
 931
 932         default:
 933                 return -EINVAL;
 934         }
 935
 936         return 0;
 937 }
 938
 939 static const struct media_entity_operations ipipeif_media_ops = {
 940         .link_setup = ipipeif_link_setup,
 941 };
 942
 943 /*
 944  * vpfe_ipipeif_unregister_entities() - Unregister entity
 945  * @ipipeif - pointer to ipipeif subdevice structure.
 946  */
 947 void vpfe_ipipeif_unregister_entities(struct vpfe_ipipeif_device *ipipeif)
 948 {
 949         /* unregister video device */
 950         vpfe_video_unregister(&ipipeif->video_in);
 951
 952         /* unregister subdev */
 953         v4l2_device_unregister_subdev(&ipipeif->subdev);
 954         /* cleanup entity */
 955         media_entity_cleanup(&ipipeif->subdev.entity);
 956 }
 957
 958 int
 959 vpfe_ipipeif_register_entities(struct vpfe_ipipeif_device *ipipeif,
 960                                struct v4l2_device *vdev)
 961 {
 962         struct vpfe_device *vpfe_dev = to_vpfe_device(ipipeif);
 963         unsigned int flags;
 964         int ret;
 965
 966         /* Register the subdev */
 967         ret = v4l2_device_register_subdev(vdev, &ipipeif->subdev);
 968         if (ret < 0)
 969                 return ret;
 970
 971         ret = vpfe_video_register(&ipipeif->video_in, vdev);
 972         if (ret) {
 973                 pr_err("Failed to register ipipeif video-in device\n");
 974                 goto fail;
 975         }
 976         ipipeif->video_in.vpfe_dev = vpfe_dev;
 977
 978         flags = 0;
 979         ret = media_create_pad_link(&ipipeif->video_in.video_dev.entity, 0,
 980                                         &ipipeif->subdev.entity, 0, flags);
 981         if (ret < 0)
 982                 goto fail;
 983
 984         return 0;
 985 fail:
 986         v4l2_device_unregister_subdev(&ipipeif->subdev);
 987
 988         return ret;
 989 }
 990
 991 #define IPIPEIF_GAIN_HIGH               0x3ff
 992 #define IPIPEIF_DEFAULT_GAIN            0x200
 993
 994 int vpfe_ipipeif_init(struct vpfe_ipipeif_device *ipipeif,
 995                       struct platform_device *pdev)
 996 {
 997         struct v4l2_subdev *sd = &ipipeif->subdev;
 998         struct media_pad *pads = &ipipeif->pads[0];
 999         struct media_entity *me = &sd->entity;
1000         static resource_size_t  res_len;
1001         struct resource *res;
1002         int ret;
1003
1004         res = platform_get_resource(pdev, IORESOURCE_MEM, 3);
1005         if (!res)
1006                 return -ENOENT;
1007
1008         res_len = resource_size(res);
1009         res = request_mem_region(res->start, res_len, res->name);
1010         if (!res)
1011                 return -EBUSY;
1012
1013         ipipeif->ipipeif_base_addr = ioremap_nocache(res->start, res_len);
1014         if (!ipipeif->ipipeif_base_addr) {
1015                 ret =  -EBUSY;
1016                 goto fail;
1017         }
1018
1019         v4l2_subdev_init(sd, &ipipeif_v4l2_ops);
1020
1021         sd->internal_ops = &ipipeif_v4l2_internal_ops;
1022         strlcpy(sd->name, "DAVINCI IPIPEIF", sizeof(sd->name));
1023         sd->grp_id = 1 << 16;   /* group ID for davinci subdevs */
1024
1025         v4l2_set_subdevdata(sd, ipipeif);
1026
1027         sd->flags |= V4L2_SUBDEV_FL_HAS_EVENTS | V4L2_SUBDEV_FL_HAS_DEVNODE;
1028         pads[IPIPEIF_PAD_SINK].flags = MEDIA_PAD_FL_SINK;
1029         pads[IPIPEIF_PAD_SOURCE].flags = MEDIA_PAD_FL_SOURCE;
1030         ipipeif->input = IPIPEIF_INPUT_NONE;
1031         ipipeif->output = IPIPEIF_OUTPUT_NONE;
1032         me->ops = &ipipeif_media_ops;
1033
1034         ret = media_entity_init(me, IPIPEIF_NUM_PADS, pads);
1035         if (ret)
1036                 goto fail;
1037
1038         v4l2_ctrl_handler_init(&ipipeif->ctrls, 2);
1039         v4l2_ctrl_new_std(&ipipeif->ctrls, &ipipeif_ctrl_ops,
1040                           V4L2_CID_GAIN, 0,
1041                           IPIPEIF_GAIN_HIGH, 1, IPIPEIF_DEFAULT_GAIN);
1042         v4l2_ctrl_new_custom(&ipipeif->ctrls, &vpfe_ipipeif_dpcm_pred, NULL);
1043         v4l2_ctrl_handler_setup(&ipipeif->ctrls);
1044         sd->ctrl_handler = &ipipeif->ctrls;
1045
1046         ipipeif->video_in.ops = &video_in_ops;
1047         ipipeif->video_in.type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
1048         ret = vpfe_video_init(&ipipeif->video_in, "IPIPEIF");
1049         if (ret) {
1050                 pr_err("Failed to init IPIPEIF video-in device\n");
1051                 goto fail;
1052         }
1053         ipipeif_set_default_config(ipipeif);
1054         return 0;
1055 fail:
1056         release_mem_region(res->start, res_len);
1057         return ret;
1058 }
1059
1060 void
1061 vpfe_ipipeif_cleanup(struct vpfe_ipipeif_device *ipipeif,
1062                      struct platform_device *pdev)
1063 {
1064         struct resource *res;
1065
1066         v4l2_ctrl_handler_free(&ipipeif->ctrls);
1067         iounmap(ipipeif->ipipeif_base_addr);
1068         res = platform_get_resource(pdev, IORESOURCE_MEM, 3);
1069         if (res)
1070                 release_mem_region(res->start, resource_size(res));
1071
1072 }