drivers/media/i2c/ccs/ccs-data.c

   1 // SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
   2 /*
   3  * CCS static data binary parser library
   4  *
   5  * Copyright 2019--2020 Intel Corporation
   6  */
   7
   8 #include <linux/device.h>
   9 #include <linux/errno.h>
  10 #include <linux/limits.h>
  11 #include <linux/mm.h>
  12 #include <linux/slab.h>
  13 #include <linux/types.h>
  14
  15 #include "ccs-data-defs.h"
  16
  17 struct bin_container {
  18         void *base;
  19         void *now;
  20         void *end;
  21         size_t size;
  22 };
  23
  24 static void *bin_alloc(struct bin_container *bin, size_t len)
  25 {
  26         void *ptr;
  27
  28         len = ALIGN(len, 8);
  29
  30         if (bin->end - bin->now < len)
  31                 return NULL;
  32
  33         ptr = bin->now;
  34         bin->now += len;
  35
  36         return ptr;
  37 }
  38
  39 static void bin_reserve(struct bin_container *bin, size_t len)
  40 {
  41         bin->size += ALIGN(len, 8);
  42 }
  43
  44 static int bin_backing_alloc(struct bin_container *bin)
  45 {
  46         bin->base = bin->now = kvzalloc(bin->size, GFP_KERNEL);
  47         if (!bin->base)
  48                 return -ENOMEM;
  49
  50         bin->end = bin->base + bin->size;
  51
  52         return 0;
  53 }
  54
  55 #define is_contained(var, endp)                         \
  56         (sizeof(*var) <= (endp) - (void *)(var))
  57 #define has_headroom(ptr, headroom, endp)       \
  58         ((headroom) <= (endp) - (void *)(ptr))
  59 #define is_contained_with_headroom(var, headroom, endp)         \
  60         (sizeof(*var) + (headroom) <= (endp) - (void *)(var))
  61
  62 static int
  63 ccs_data_parse_length_specifier(const struct __ccs_data_length_specifier *__len,
  64                                 size_t *__hlen, size_t *__plen,
  65                                 const void *endp)
  66 {
  67         size_t hlen, plen;
  68
  69         if (!is_contained(__len, endp))
  70                 return -ENODATA;
  71
  72         switch (__len->length >> CCS_DATA_LENGTH_SPECIFIER_SIZE_SHIFT) {
  73         case CCS_DATA_LENGTH_SPECIFIER_1:
  74                 hlen = sizeof(*__len);
  75                 plen = __len->length &
  76                         ((1 << CCS_DATA_LENGTH_SPECIFIER_SIZE_SHIFT) - 1);
  77                 break;
  78         case CCS_DATA_LENGTH_SPECIFIER_2: {
  79                 struct __ccs_data_length_specifier2 *__len2 = (void *)__len;
  80
  81                 if (!is_contained(__len2, endp))
  82                         return -ENODATA;
  83
  84                 hlen = sizeof(*__len2);
  85                 plen = ((size_t)
  86                         (__len2->length[0] &
  87                          ((1 << CCS_DATA_LENGTH_SPECIFIER_SIZE_SHIFT) - 1))
  88                         << 8) + __len2->length[1];
  89                 break;
  90         }
  91         case CCS_DATA_LENGTH_SPECIFIER_3: {
  92                 struct __ccs_data_length_specifier3 *__len3 = (void *)__len;
  93
  94                 if (!is_contained(__len3, endp))
  95                         return -ENODATA;
  96
  97                 hlen = sizeof(*__len3);
  98                 plen = ((size_t)
  99                         (__len3->length[0] &
 100                          ((1 << CCS_DATA_LENGTH_SPECIFIER_SIZE_SHIFT) - 1))
 101                         << 16) + (__len3->length[0] << 8) + __len3->length[1];
 102                 break;
 103         }
 104         default:
 105                 return -EINVAL;
 106         }
 107
 108         if (!has_headroom(__len, hlen + plen, endp))
 109                 return -ENODATA;
 110
 111         *__hlen = hlen;
 112         *__plen = plen;
 113
 114         return 0;
 115 }
 116
 117 static u8
 118 ccs_data_parse_format_version(const struct __ccs_data_block *block)
 119 {
 120         return block->id >> CCS_DATA_BLOCK_HEADER_ID_VERSION_SHIFT;
 121 }
 122
 123 static u8 ccs_data_parse_block_id(const struct __ccs_data_block *block,
 124                                        bool is_first)
 125 {
 126         if (!is_first)
 127                 return block->id;
 128
 129         return block->id & ((1 << CCS_DATA_BLOCK_HEADER_ID_VERSION_SHIFT) - 1);
 130 }
 131
 132 static int ccs_data_parse_version(struct bin_container *bin,
 133                                   struct ccs_data_container *ccsdata,
 134                                   const void *payload, const void *endp)
 135 {
 136         const struct __ccs_data_block_version *v = payload;
 137         struct ccs_data_block_version *vv;
 138
 139         if (v + 1 != endp)
 140                 return -ENODATA;
 141
 142         if (!bin->base) {
 143                 bin_reserve(bin, sizeof(*ccsdata->version));
 144                 return 0;
 145         }
 146
 147         ccsdata->version = bin_alloc(bin, sizeof(*ccsdata->version));
 148         if (!ccsdata->version)
 149                 return -ENOMEM;
 150
 151         vv = ccsdata->version;
 152         vv->version_major = ((u16)v->static_data_version_major[0] << 8) +
 153                 v->static_data_version_major[1];
 154         vv->version_minor = ((u16)v->static_data_version_minor[0] << 8) +
 155                 v->static_data_version_major[1];
 156         vv->date_year =  ((u16)v->year[0] << 8) + v->year[1];
 157         vv->date_month = v->month;
 158         vv->date_day = v->day;
 159
 160         return 0;
 161 }
 162
 163 static void print_ccs_data_version(struct device *dev,
 164                                    struct ccs_data_block_version *v)
 165 {
 166         dev_dbg(dev,
 167                 "static data version %4.4x.%4.4x, date %4.4u-%2.2u-%2.2u\n",
 168                 v->version_major, v->version_minor,
 169                 v->date_year, v->date_month, v->date_day);
 170 }
 171
 172 static int ccs_data_block_parse_header(const struct __ccs_data_block *block,
 173                                        bool is_first, unsigned int *__block_id,
 174                                        const void **payload,
 175                                        const struct __ccs_data_block **next_block,
 176                                        const void *endp, struct device *dev,
 177                                        bool verbose)
 178 {
 179         size_t plen, hlen;
 180         u8 block_id;
 181         int rval;
 182
 183         if (!is_contained(block, endp))
 184                 return -ENODATA;
 185
 186         rval = ccs_data_parse_length_specifier(&block->length, &hlen, &plen,
 187                                                endp);
 188         if (rval < 0)
 189                 return rval;
 190
 191         block_id = ccs_data_parse_block_id(block, is_first);
 192
 193         if (verbose)
 194                 dev_dbg(dev,
 195                         "Block ID 0x%2.2x, header length %zu, payload length %zu\n",
 196                         block_id, hlen, plen);
 197
 198         if (!has_headroom(&block->length, hlen + plen, endp))
 199                 return -ENODATA;
 200
 201         if (__block_id)
 202                 *__block_id = block_id;
 203
 204         if (payload)
 205                 *payload = (void *)&block->length + hlen;
 206
 207         if (next_block)
 208                 *next_block = (void *)&block->length + hlen + plen;
 209
 210         return 0;
 211 }
 212
 213 static int ccs_data_parse_regs(struct bin_container *bin,
 214                                struct ccs_reg **__regs,
 215                                size_t *__num_regs, const void *payload,
 216                                const void *endp, struct device *dev)
 217 {
 218         struct ccs_reg *regs_base, *regs;
 219         size_t num_regs = 0;
 220         u16 addr = 0;
 221
 222         if (bin->base && __regs) {
 223                 regs = regs_base = bin_alloc(bin, sizeof(*regs) * *__num_regs);
 224                 if (!regs)
 225                         return -ENOMEM;
 226         }
 227
 228         while (payload < endp && num_regs < INT_MAX) {
 229                 const struct __ccs_data_block_regs *r = payload;
 230                 size_t len;
 231                 const void *data;
 232
 233                 if (!is_contained(r, endp))
 234                         return -ENODATA;
 235
 236                 switch (r->reg_len >> CCS_DATA_BLOCK_REGS_SEL_SHIFT) {
 237                 case CCS_DATA_BLOCK_REGS_SEL_REGS:
 238                         addr += r->reg_len & CCS_DATA_BLOCK_REGS_ADDR_MASK;
 239                         len = ((r->reg_len & CCS_DATA_BLOCK_REGS_LEN_MASK)
 240                                >> CCS_DATA_BLOCK_REGS_LEN_SHIFT) + 1;
 241
 242                         if (!is_contained_with_headroom(r, len, endp))
 243                                 return -ENODATA;
 244
 245                         data = r + 1;
 246                         break;
 247                 case CCS_DATA_BLOCK_REGS_SEL_REGS2: {
 248                         const struct __ccs_data_block_regs2 *r2 = payload;
 249
 250                         if (!is_contained(r2, endp))
 251                                 return -ENODATA;
 252
 253                         addr += ((u16)(r2->reg_len &
 254                                        CCS_DATA_BLOCK_REGS_2_ADDR_MASK) << 8)
 255                                 + r2->addr;
 256                         len = ((r2->reg_len & CCS_DATA_BLOCK_REGS_2_LEN_MASK)
 257                                >> CCS_DATA_BLOCK_REGS_2_LEN_SHIFT) + 1;
 258
 259                         if (!is_contained_with_headroom(r2, len, endp))
 260                                 return -ENODATA;
 261
 262                         data = r2 + 1;
 263                         break;
 264                 }
 265                 case CCS_DATA_BLOCK_REGS_SEL_REGS3: {
 266                         const struct __ccs_data_block_regs3 *r3 = payload;
 267
 268                         if (!is_contained(r3, endp))
 269                                 return -ENODATA;
 270
 271                         addr = ((u16)r3->addr[0] << 8) + r3->addr[1];
 272                         len = (r3->reg_len & CCS_DATA_BLOCK_REGS_3_LEN_MASK) + 1;
 273
 274                         if (!is_contained_with_headroom(r3, len, endp))
 275                                 return -ENODATA;
 276
 277                         data = r3 + 1;
 278                         break;
 279                 }
 280                 default:
 281                         return -EINVAL;
 282                 }
 283
 284                 num_regs++;
 285
 286                 if (!bin->base) {
 287                         bin_reserve(bin, len);
 288                 } else if (__regs) {
 289                         regs->addr = addr;
 290                         regs->len = len;
 291                         regs->value = bin_alloc(bin, len);
 292                         if (!regs->value)
 293                                 return -ENOMEM;
 294
 295                         memcpy(regs->value, data, len);
 296                         regs++;
 297                 }
 298
 299                 addr += len;
 300                 payload = data + len;
 301         }
 302
 303         if (!bin->base)
 304                 bin_reserve(bin, sizeof(*regs) * num_regs);
 305
 306         if (__num_regs)
 307                 *__num_regs = num_regs;
 308
 309         if (bin->base && __regs)
 310                 *__regs = regs_base;
 311
 312         return 0;
 313 }
 314
 315 static int ccs_data_parse_reg_rules(struct bin_container *bin,
 316                                     struct ccs_reg **__regs,
 317                                     size_t *__num_regs,
 318                                     const void *payload,
 319                                     const void *endp, struct device *dev)
 320 {
 321         int rval;
 322
 323         if (!bin->base)
 324                 return ccs_data_parse_regs(bin, NULL, NULL, payload, endp, dev);
 325
 326         rval = ccs_data_parse_regs(bin, NULL, __num_regs, payload, endp, dev);
 327         if (rval)
 328                 return rval;
 329
 330         return ccs_data_parse_regs(bin, __regs, __num_regs, payload, endp,
 331                                    dev);
 332 }
 333
 334 static void assign_ffd_entry(struct ccs_frame_format_desc *desc,
 335                              const struct __ccs_data_block_ffd_entry *ent)
 336 {
 337         desc->pixelcode = ent->pixelcode;
 338         desc->value = ((u16)ent->value[0] << 8) + ent->value[1];
 339 }
 340
 341 static int ccs_data_parse_ffd(struct bin_container *bin,
 342                               struct ccs_frame_format_descs **ffd,
 343                               const void *payload,
 344                               const void *endp, struct device *dev)
 345 {
 346         const struct __ccs_data_block_ffd *__ffd = payload;
 347         const struct __ccs_data_block_ffd_entry *__entry;
 348         unsigned int i;
 349
 350         if (!is_contained(__ffd, endp))
 351                 return -ENODATA;
 352
 353         if ((void *)__ffd + sizeof(*__ffd) +
 354             ((u32)__ffd->num_column_descs +
 355              (u32)__ffd->num_row_descs) *
 356             sizeof(struct __ccs_data_block_ffd_entry) != endp)
 357                 return -ENODATA;
 358
 359         if (!bin->base) {
 360                 bin_reserve(bin, sizeof(**ffd));
 361                 bin_reserve(bin, __ffd->num_column_descs *
 362                             sizeof(struct ccs_frame_format_desc));
 363                 bin_reserve(bin, __ffd->num_row_descs *
 364                             sizeof(struct ccs_frame_format_desc));
 365
 366                 return 0;
 367         }
 368
 369         *ffd = bin_alloc(bin, sizeof(**ffd));
 370         if (!*ffd)
 371                 return -ENOMEM;
 372
 373         (*ffd)->num_column_descs = __ffd->num_column_descs;
 374         (*ffd)->num_row_descs = __ffd->num_row_descs;
 375         __entry = (void *)(__ffd + 1);
 376
 377         (*ffd)->column_descs = bin_alloc(bin, __ffd->num_column_descs *
 378                                          sizeof(*(*ffd)->column_descs));
 379         if (!(*ffd)->column_descs)
 380                 return -ENOMEM;
 381
 382         for (i = 0; i < __ffd->num_column_descs; i++, __entry++)
 383                 assign_ffd_entry(&(*ffd)->column_descs[i], __entry);
 384
 385         (*ffd)->row_descs = bin_alloc(bin, __ffd->num_row_descs *
 386                                       sizeof(*(*ffd)->row_descs));
 387         if (!(*ffd)->row_descs)
 388                 return -ENOMEM;
 389
 390         for (i = 0; i < __ffd->num_row_descs; i++, __entry++)
 391                 assign_ffd_entry(&(*ffd)->row_descs[i], __entry);
 392
 393         if (__entry != endp)
 394                 return -EPROTO;
 395
 396         return 0;
 397 }
 398
 399 static int ccs_data_parse_pdaf_readout(struct bin_container *bin,
 400                                        struct ccs_pdaf_readout **pdaf_readout,
 401                                        const void *payload,
 402                                        const void *endp, struct device *dev)
 403 {
 404         const struct __ccs_data_block_pdaf_readout *__pdaf = payload;
 405
 406         if (!is_contained(__pdaf, endp))
 407                 return -ENODATA;
 408
 409         if (!bin->base) {
 410                 bin_reserve(bin, sizeof(**pdaf_readout));
 411         } else {
 412                 *pdaf_readout = bin_alloc(bin, sizeof(**pdaf_readout));
 413                 if (!*pdaf_readout)
 414                         return -ENOMEM;
 415
 416                 (*pdaf_readout)->pdaf_readout_info_order =
 417                         __pdaf->pdaf_readout_info_order;
 418         }
 419
 420         return ccs_data_parse_ffd(bin, !bin->base ? NULL : &(*pdaf_readout)->ffd,
 421                                   __pdaf + 1, endp, dev);
 422 }
 423
 424 static int ccs_data_parse_rules(struct bin_container *bin,
 425                                 struct ccs_rule **__rules,
 426                                 size_t *__num_rules, const void *payload,
 427                                 const void *endp, struct device *dev)
 428 {
 429         struct ccs_rule *rules_base, *rules = NULL, *next_rule;
 430         size_t num_rules = 0;
 431         const void *__next_rule = payload;
 432         int rval;
 433
 434         if (bin->base) {
 435                 rules_base = next_rule =
 436                         bin_alloc(bin, sizeof(*rules) * *__num_rules);
 437                 if (!rules_base)
 438                         return -ENOMEM;
 439         }
 440
 441         while (__next_rule < endp) {
 442                 size_t rule_hlen, rule_plen, rule_plen2;
 443                 const u8 *__rule_type;
 444                 const void *rule_payload;
 445
 446                 /* Size of a single rule */
 447                 rval = ccs_data_parse_length_specifier(__next_rule, &rule_hlen,
 448                                                        &rule_plen, endp);
 449
 450                 if (rval < 0)
 451                         return rval;
 452
 453                 __rule_type = __next_rule + rule_hlen;
 454
 455                 if (!is_contained(__rule_type, endp))
 456                         return -ENODATA;
 457
 458                 rule_payload = __rule_type + 1;
 459                 rule_plen2 = rule_plen - sizeof(*__rule_type);
 460
 461                 switch (*__rule_type) {
 462                 case CCS_DATA_BLOCK_RULE_ID_IF: {
 463                         const struct __ccs_data_block_rule_if *__if_rules =
 464                                 rule_payload;
 465                         const size_t __num_if_rules =
 466                                 rule_plen2 / sizeof(*__if_rules);
 467                         struct ccs_if_rule *if_rule;
 468
 469                         if (!has_headroom(__if_rules,
 470                                           sizeof(*__if_rules) * __num_if_rules,
 471                                           rule_payload + rule_plen2))
 472                                 return -ENODATA;
 473
 474                         /* Also check there is no extra data */
 475                         if (__if_rules + __num_if_rules !=
 476                             rule_payload + rule_plen2)
 477                                 return -EINVAL;
 478
 479                         if (!bin->base) {
 480                                 bin_reserve(bin,
 481                                             sizeof(*if_rule) *
 482                                             __num_if_rules);
 483                                 num_rules++;
 484                         } else {
 485                                 unsigned int i;
 486
 487                                 rules = next_rule;
 488                                 next_rule++;
 489
 490                                 if_rule = bin_alloc(bin,
 491                                                     sizeof(*if_rule) *
 492                                                     __num_if_rules);
 493                                 if (!if_rule)
 494                                         return -ENOMEM;
 495
 496                                 for (i = 0; i < __num_if_rules; i++) {
 497                                         if_rule[i].addr =
 498                                                 ((u16)__if_rules[i].addr[0]
 499                                                  << 8) +
 500                                                 __if_rules[i].addr[1];
 501                                         if_rule[i].value = __if_rules[i].value;
 502                                         if_rule[i].mask = __if_rules[i].mask;
 503                                 }
 504
 505                                 rules->if_rules = if_rule;
 506                                 rules->num_if_rules = __num_if_rules;
 507                         }
 508                         break;
 509                 }
 510                 case CCS_DATA_BLOCK_RULE_ID_READ_ONLY_REGS:
 511                         rval = ccs_data_parse_reg_rules(bin, &rules->read_only_regs,
 512                                                         &rules->num_read_only_regs,
 513                                                         rule_payload,
 514                                                         rule_payload + rule_plen2,
 515                                                         dev);
 516                         if (rval)
 517                                 return rval;
 518                         break;
 519                 case CCS_DATA_BLOCK_RULE_ID_FFD:
 520                         rval = ccs_data_parse_ffd(bin, &rules->frame_format,
 521                                                   rule_payload,
 522                                                   rule_payload + rule_plen2,
 523                                                   dev);
 524                         if (rval)
 525                                 return rval;
 526                         break;
 527                 case CCS_DATA_BLOCK_RULE_ID_MSR:
 528                         rval = ccs_data_parse_reg_rules(bin,
 529                                                         &rules->manufacturer_regs,
 530                                                         &rules->num_manufacturer_regs,
 531                                                         rule_payload,
 532                                                         rule_payload + rule_plen2,
 533                                                         dev);
 534                         if (rval)
 535                                 return rval;
 536                         break;
 537                 case CCS_DATA_BLOCK_RULE_ID_PDAF_READOUT:
 538                         rval = ccs_data_parse_pdaf_readout(bin,
 539                                                            &rules->pdaf_readout,
 540                                                            rule_payload,
 541                                                            rule_payload + rule_plen2,
 542                                                            dev);
 543                         if (rval)
 544                                 return rval;
 545                         break;
 546                 default:
 547                         dev_dbg(dev,
 548                                 "Don't know how to handle rule type %u!\n",
 549                                 *__rule_type);
 550                         return -EINVAL;
 551                 }
 552                 __next_rule = __next_rule + rule_hlen + rule_plen;
 553         }
 554
 555         if (!bin->base) {
 556                 bin_reserve(bin, sizeof(*rules) * num_rules);
 557                 *__num_rules = num_rules;
 558         } else {
 559                 *__rules = rules_base;
 560         }
 561
 562         return 0;
 563 }
 564
 565 static int ccs_data_parse_pdaf(struct bin_container *bin, struct ccs_pdaf_pix_loc **pdaf,
 566                                const void *payload, const void *endp,
 567                                struct device *dev)
 568 {
 569         const struct __ccs_data_block_pdaf_pix_loc *__pdaf = payload;
 570         const struct __ccs_data_block_pdaf_pix_loc_block_desc_group *__bdesc_group;
 571         const struct __ccs_data_block_pdaf_pix_loc_pixel_desc *__pixel_desc;
 572         unsigned int i;
 573         u16 num_block_desc_groups;
 574         u8 max_block_type_id = 0;
 575         const u8 *__num_pixel_descs;
 576
 577         if (!is_contained(__pdaf, endp))
 578                 return -ENODATA;
 579
 580         if (bin->base) {
 581                 *pdaf = bin_alloc(bin, sizeof(**pdaf));
 582                 if (!*pdaf)
 583                         return -ENOMEM;
 584         } else {
 585                 bin_reserve(bin, sizeof(**pdaf));
 586         }
 587
 588         num_block_desc_groups =
 589                 ((u16)__pdaf->num_block_desc_groups[0] << 8) +
 590                 __pdaf->num_block_desc_groups[1];
 591
 592         if (bin->base) {
 593                 (*pdaf)->main_offset_x =
 594                         ((u16)__pdaf->main_offset_x[0] << 8) +
 595                         __pdaf->main_offset_x[1];
 596                 (*pdaf)->main_offset_y =
 597                         ((u16)__pdaf->main_offset_y[0] << 8) +
 598                         __pdaf->main_offset_y[1];
 599                 (*pdaf)->global_pdaf_type = __pdaf->global_pdaf_type;
 600                 (*pdaf)->block_width = __pdaf->block_width;
 601                 (*pdaf)->block_height = __pdaf->block_height;
 602                 (*pdaf)->num_block_desc_groups = num_block_desc_groups;
 603         }
 604
 605         __bdesc_group = (const void *)(__pdaf + 1);
 606
 607         if (bin->base) {
 608                 (*pdaf)->block_desc_groups =
 609                         bin_alloc(bin,
 610                                   sizeof(struct ccs_pdaf_pix_loc_block_desc_group) *
 611                                   num_block_desc_groups);
 612                 if (!(*pdaf)->block_desc_groups)
 613                         return -ENOMEM;
 614         } else {
 615                 bin_reserve(bin, sizeof(struct ccs_pdaf_pix_loc_block_desc_group) *
 616                             num_block_desc_groups);
 617         }
 618
 619         for (i = 0; i < num_block_desc_groups; i++) {
 620                 const struct __ccs_data_block_pdaf_pix_loc_block_desc *__bdesc;
 621                 u16 num_block_descs;
 622                 unsigned int j;
 623
 624                 if (!is_contained(__bdesc_group, endp))
 625                         return -ENODATA;
 626
 627                 num_block_descs =
 628                         ((u16)__bdesc_group->num_block_descs[0] << 8) +
 629                         __bdesc_group->num_block_descs[1];
 630
 631                 if (bin->base) {
 632                         (*pdaf)->block_desc_groups[i].repeat_y =
 633                                 __bdesc_group->repeat_y;
 634                         (*pdaf)->block_desc_groups[i].num_block_descs =
 635                                 num_block_descs;
 636                 }
 637
 638                 __bdesc = (const void *)(__bdesc_group + 1);
 639
 640                 if (bin->base) {
 641                         (*pdaf)->block_desc_groups[i].block_descs =
 642                                 bin_alloc(bin,
 643                                           sizeof(struct ccs_pdaf_pix_loc_block_desc) *
 644                                           num_block_descs);
 645                         if (!(*pdaf)->block_desc_groups[i].block_descs)
 646                                 return -ENOMEM;
 647                 } else {
 648                         bin_reserve(bin, sizeof(struct ccs_pdaf_pix_loc_block_desc) *
 649                                     num_block_descs);
 650                 }
 651
 652                 for (j = 0; j < num_block_descs; j++, __bdesc++) {
 653                         struct ccs_pdaf_pix_loc_block_desc *bdesc;
 654
 655                         if (!is_contained(__bdesc, endp))
 656                                 return -ENODATA;
 657
 658                         if (max_block_type_id <= __bdesc->block_type_id)
 659                                 max_block_type_id = __bdesc->block_type_id + 1;
 660
 661                         if (!bin->base)
 662                                 continue;
 663
 664                         bdesc = &(*pdaf)->block_desc_groups[i].block_descs[j];
 665
 666                         bdesc->repeat_x = ((u16)__bdesc->repeat_x[0] << 8)
 667                                 + __bdesc->repeat_x[1];
 668
 669                         if (__bdesc->block_type_id >= num_block_descs)
 670                                 return -EINVAL;
 671
 672                         bdesc->block_type_id = __bdesc->block_type_id;
 673                 }
 674
 675                 __bdesc_group = (const void *)__bdesc;
 676         }
 677
 678         __num_pixel_descs = (const void *)__bdesc_group;
 679
 680         if (bin->base) {
 681                 (*pdaf)->pixel_desc_groups =
 682                         bin_alloc(bin,
 683                                   sizeof(struct ccs_pdaf_pix_loc_pixel_desc_group) *
 684                                   max_block_type_id);
 685                 if (!(*pdaf)->pixel_desc_groups)
 686                         return -ENOMEM;
 687                 (*pdaf)->num_pixel_desc_grups = max_block_type_id;
 688         } else {
 689                 bin_reserve(bin, sizeof(struct ccs_pdaf_pix_loc_pixel_desc_group) *
 690                             max_block_type_id);
 691         }
 692
 693         for (i = 0; i < max_block_type_id; i++) {
 694                 struct ccs_pdaf_pix_loc_pixel_desc_group *pdgroup;
 695                 unsigned int j;
 696
 697                 if (!is_contained(__num_pixel_descs, endp))
 698                         return -ENODATA;
 699
 700                 if (bin->base) {
 701                         pdgroup = &(*pdaf)->pixel_desc_groups[i];
 702                         pdgroup->descs =
 703                                 bin_alloc(bin,
 704                                           sizeof(struct ccs_pdaf_pix_loc_pixel_desc) *
 705                                           *__num_pixel_descs);
 706                         if (!pdgroup->descs)
 707                                 return -ENOMEM;
 708                         pdgroup->num_descs = *__num_pixel_descs;
 709                 } else {
 710                         bin_reserve(bin, sizeof(struct ccs_pdaf_pix_loc_pixel_desc) *
 711                                     *__num_pixel_descs);
 712                 }
 713
 714                 __pixel_desc = (const void *)(__num_pixel_descs + 1);
 715
 716                 for (j = 0; j < *__num_pixel_descs; j++, __pixel_desc++) {
 717                         struct ccs_pdaf_pix_loc_pixel_desc *pdesc;
 718
 719                         if (!is_contained(__pixel_desc, endp))
 720                                 return -ENODATA;
 721
 722                         if (!bin->base)
 723                                 continue;
 724
 725                         pdesc = &pdgroup->descs[j];
 726                         pdesc->pixel_type = __pixel_desc->pixel_type;
 727                         pdesc->small_offset_x = __pixel_desc->small_offset_x;
 728                         pdesc->small_offset_y = __pixel_desc->small_offset_y;
 729                 }
 730
 731                 __num_pixel_descs = (const void *)(__pixel_desc + 1);
 732         }
 733
 734         return 0;
 735 }
 736
 737 static int ccs_data_parse_license(struct bin_container *bin,
 738                                   char **__license,
 739                                   size_t *__license_length,
 740                                   const void *payload, const void *endp)
 741 {
 742         size_t size = endp - payload;
 743         char *license;
 744
 745         if (!bin->base) {
 746                 bin_reserve(bin, size);
 747                 return 0;
 748         }
 749
 750         license = bin_alloc(bin, size);
 751         if (!license)
 752                 return -ENOMEM;
 753
 754         memcpy(license, payload, size);
 755
 756         *__license = license;
 757         *__license_length = size;
 758
 759         return 0;
 760 }
 761
 762 static int ccs_data_parse_end(bool *end, const void *payload, const void *endp,
 763                               struct device *dev)
 764 {
 765         const struct __ccs_data_block_end *__end = payload;
 766
 767         if (__end + 1 != endp) {
 768                 dev_dbg(dev, "Invalid end block length %u\n",
 769                         (unsigned int)(endp - payload));
 770                 return -ENODATA;
 771         }
 772
 773         *end = true;
 774
 775         return 0;
 776 }
 777
 778 static int __ccs_data_parse(struct bin_container *bin,
 779                             struct ccs_data_container *ccsdata,
 780                             const void *data, size_t len, struct device *dev,
 781                             bool verbose)
 782 {
 783         const struct __ccs_data_block *block = data;
 784         const struct __ccs_data_block *endp = data + len;
 785         unsigned int version;
 786         bool is_first = true;
 787         int rval;
 788
 789         version = ccs_data_parse_format_version(block);
 790         if (version != CCS_STATIC_DATA_VERSION) {
 791                 dev_dbg(dev, "Don't know how to handle version %u\n", version);
 792                 return -EINVAL;
 793         }
 794
 795         if (verbose)
 796                 dev_dbg(dev, "Parsing CCS static data version %u\n", version);
 797
 798         if (!bin->base)
 799                 *ccsdata = (struct ccs_data_container){ 0 };
 800
 801         while (block < endp) {
 802                 const struct __ccs_data_block *next_block;
 803                 unsigned int block_id;
 804                 const void *payload;
 805
 806                 rval = ccs_data_block_parse_header(block, is_first, &block_id,
 807                                                    &payload, &next_block, endp,
 808                                                    dev,
 809                                                    bin->base ? false : verbose);
 810
 811                 if (rval < 0)
 812                         return rval;
 813
 814                 switch (block_id) {
 815                 case CCS_DATA_BLOCK_ID_DUMMY:
 816                         break;
 817                 case CCS_DATA_BLOCK_ID_DATA_VERSION:
 818                         rval = ccs_data_parse_version(bin, ccsdata, payload,
 819                                                       next_block);
 820                         if (rval < 0)
 821                                 return rval;
 822                         break;
 823                 case CCS_DATA_BLOCK_ID_SENSOR_READ_ONLY_REGS:
 824                         rval = ccs_data_parse_regs(
 825                                 bin, &ccsdata->sensor_read_only_regs,
 826                                 &ccsdata->num_sensor_read_only_regs, payload,
 827                                 next_block, dev);
 828                         if (rval < 0)
 829                                 return rval;
 830                         break;
 831                 case CCS_DATA_BLOCK_ID_SENSOR_MANUFACTURER_REGS:
 832                         rval = ccs_data_parse_regs(
 833                                 bin, &ccsdata->sensor_manufacturer_regs,
 834                                 &ccsdata->num_sensor_manufacturer_regs, payload,
 835                                 next_block, dev);
 836                         if (rval < 0)
 837                                 return rval;
 838                         break;
 839                 case CCS_DATA_BLOCK_ID_MODULE_READ_ONLY_REGS:
 840                         rval = ccs_data_parse_regs(
 841                                 bin, &ccsdata->module_read_only_regs,
 842                                 &ccsdata->num_module_read_only_regs, payload,
 843                                 next_block, dev);
 844                         if (rval < 0)
 845                                 return rval;
 846                         break;
 847                 case CCS_DATA_BLOCK_ID_MODULE_MANUFACTURER_REGS:
 848                         rval = ccs_data_parse_regs(
 849                                 bin, &ccsdata->module_manufacturer_regs,
 850                                 &ccsdata->num_module_manufacturer_regs, payload,
 851                                 next_block, dev);
 852                         if (rval < 0)
 853                                 return rval;
 854                         break;
 855                 case CCS_DATA_BLOCK_ID_SENSOR_PDAF_PIXEL_LOCATION:
 856                         rval = ccs_data_parse_pdaf(bin, &ccsdata->sensor_pdaf,
 857                                                    payload, next_block, dev);
 858                         if (rval < 0)
 859                                 return rval;
 860                         break;
 861                 case CCS_DATA_BLOCK_ID_MODULE_PDAF_PIXEL_LOCATION:
 862                         rval = ccs_data_parse_pdaf(bin, &ccsdata->module_pdaf,
 863                                                    payload, next_block, dev);
 864                         if (rval < 0)
 865                                 return rval;
 866                         break;
 867                 case CCS_DATA_BLOCK_ID_SENSOR_RULE_BASED_BLOCK:
 868                         rval = ccs_data_parse_rules(
 869                                 bin, &ccsdata->sensor_rules,
 870                                 &ccsdata->num_sensor_rules, payload, next_block,
 871                                 dev);
 872                         if (rval < 0)
 873                                 return rval;
 874                         break;
 875                 case CCS_DATA_BLOCK_ID_MODULE_RULE_BASED_BLOCK:
 876                         rval = ccs_data_parse_rules(
 877                                 bin, &ccsdata->module_rules,
 878                                 &ccsdata->num_module_rules, payload, next_block,
 879                                 dev);
 880                         if (rval < 0)
 881                                 return rval;
 882                         break;
 883                 case CCS_DATA_BLOCK_ID_LICENSE:
 884                         rval = ccs_data_parse_license(bin, &ccsdata->license,
 885                                                       &ccsdata->license_length,
 886                                                       payload, next_block);
 887                         if (rval < 0)
 888                                 return rval;
 889                         break;
 890                 case CCS_DATA_BLOCK_ID_END:
 891                         rval = ccs_data_parse_end(&ccsdata->end, payload,
 892                                                   next_block, dev);
 893                         if (rval < 0)
 894                                 return rval;
 895                         break;
 896                 default:
 897                         dev_dbg(dev, "WARNING: not handling block ID 0x%2.2x\n",
 898                                 block_id);
 899                 }
 900
 901                 block = next_block;
 902                 is_first = false;
 903         }
 904
 905         return 0;
 906 }
 907
 908 /**
 909  * ccs_data_parse - Parse a CCS static data file into a usable in-memory
 910  *                  data structure
 911  * @ccsdata:    CCS static data in-memory data structure
 912  * @data:       CCS static data binary
 913  * @len:        Length of @data
 914  * @dev:        Device the data is related to (used for printing debug messages)
 915  * @verbose:    Whether to be verbose or not
 916  */
 917 int ccs_data_parse(struct ccs_data_container *ccsdata, const void *data,
 918                    size_t len, struct device *dev, bool verbose)
 919 {
 920         struct bin_container bin = { 0 };
 921         int rval;
 922
 923         rval = __ccs_data_parse(&bin, ccsdata, data, len, dev, verbose);
 924         if (rval)
 925                 return rval;
 926
 927         rval = bin_backing_alloc(&bin);
 928         if (rval)
 929                 return rval;
 930
 931         rval = __ccs_data_parse(&bin, ccsdata, data, len, dev, false);
 932         if (rval)
 933                 goto out_free;
 934
 935         if (verbose && ccsdata->version)
 936                 print_ccs_data_version(dev, ccsdata->version);
 937
 938         if (bin.now != bin.end) {
 939                 rval = -EPROTO;
 940                 dev_dbg(dev, "parsing mismatch; base %p; now %p; end %p\n",
 941                         bin.base, bin.now, bin.end);
 942                 goto out_free;
 943         }
 944
 945         ccsdata->backing = bin.base;
 946
 947         return 0;
 948
 949 out_free:
 950         kvfree(bin.base);
 951
 952         return rval;
 953 }