include/dfu.h

   1 /* SPDX-License-Identifier: GPL-2.0+ */
   2 /*
   3  * dfu.h - DFU flashable area description
   4  *
   5  * Copyright (C) 2012 Samsung Electronics
   6  * authors: Andrzej Pietrasiewicz <andrzej.p@samsung.com>
   7  *          Lukasz Majewski <l.majewski@samsung.com>
   8  */
   9
  10 #ifndef __DFU_ENTITY_H_
  11 #define __DFU_ENTITY_H_
  12
  13 #include <linux/errno.h>
  14 #include <linux/list.h>
  15 #include <mmc.h>
  16 #include <spi_flash.h>
  17 #include <linux/usb/composite.h>
  18
  19 enum dfu_device_type {
  20         DFU_DEV_MMC = 1,
  21         DFU_DEV_ONENAND,
  22         DFU_DEV_NAND,
  23         DFU_DEV_RAM,
  24         DFU_DEV_SF,
  25         DFU_DEV_MTD,
  26         DFU_DEV_VIRT,
  27 };
  28
  29 enum dfu_layout {
  30         DFU_RAW_ADDR = 1,
  31         DFU_FS_FAT,
  32         DFU_FS_EXT2,
  33         DFU_FS_EXT3,
  34         DFU_FS_EXT4,
  35         DFU_RAM_ADDR,
  36         DFU_SKIP,
  37         DFU_SCRIPT,
  38 };
  39
  40 enum dfu_op {
  41         DFU_OP_READ = 1,
  42         DFU_OP_WRITE,
  43         DFU_OP_SIZE,
  44 };
  45
  46 struct mmc_internal_data {
  47         int dev_num;
  48
  49         /* RAW programming */
  50         unsigned int lba_start;
  51         unsigned int lba_size;
  52         unsigned int lba_blk_size;
  53
  54         /* eMMC HW partition access */
  55         int hw_partition;
  56
  57         /* FAT/EXT */
  58         unsigned int dev;
  59         unsigned int part;
  60 };
  61
  62 struct mtd_internal_data {
  63         struct mtd_info *info;
  64
  65         /* RAW programming */
  66         u64 start;
  67         u64 size;
  68         /* for ubi partition */
  69         unsigned int ubi;
  70 };
  71
  72 struct nand_internal_data {
  73         /* RAW programming */
  74         u64 start;
  75         u64 size;
  76
  77         unsigned int dev;
  78         unsigned int part;
  79         /* for nand/ubi use */
  80         unsigned int ubi;
  81 };
  82
  83 struct ram_internal_data {
  84         unsigned long   start;
  85         unsigned int    size;
  86 };
  87
  88 struct sf_internal_data {
  89         struct spi_flash *dev;
  90
  91         /* RAW programming */
  92         u64 start;
  93         u64 size;
  94         /* for sf/ubi use */
  95         unsigned int ubi;
  96 };
  97
  98 struct virt_internal_data {
  99         int dev_num;
 100 };
 101
 102
 103 #if defined(CONFIG_DFU_NAME_MAX_SIZE)
 104 #define DFU_NAME_SIZE                   CONFIG_DFU_NAME_MAX_SIZE
 105 #else
 106 #define DFU_NAME_SIZE                   32
 107 #endif
 108 #ifndef DFU_DEFAULT_POLL_TIMEOUT
 109 #define DFU_DEFAULT_POLL_TIMEOUT 0
 110 #endif
 111 #ifndef DFU_MANIFEST_POLL_TIMEOUT
 112 #define DFU_MANIFEST_POLL_TIMEOUT       DFU_DEFAULT_POLL_TIMEOUT
 113 #endif
 114
 115 struct dfu_entity {
 116         char                    name[DFU_NAME_SIZE];
 117         int                     alt;
 118         void                    *dev_private;
 119         enum dfu_device_type    dev_type;
 120         enum dfu_layout         layout;
 121         unsigned long           max_buf_size;
 122
 123         union {
 124                 struct mmc_internal_data mmc;
 125                 struct mtd_internal_data mtd;
 126                 struct nand_internal_data nand;
 127                 struct ram_internal_data ram;
 128                 struct sf_internal_data sf;
 129                 struct virt_internal_data virt;
 130         } data;
 131
 132         int (*get_medium_size)(struct dfu_entity *dfu, u64 *size);
 133
 134         int (*read_medium)(struct dfu_entity *dfu,
 135                         u64 offset, void *buf, long *len);
 136
 137         int (*write_medium)(struct dfu_entity *dfu,
 138                         u64 offset, void *buf, long *len);
 139
 140         int (*flush_medium)(struct dfu_entity *dfu);
 141         unsigned int (*poll_timeout)(struct dfu_entity *dfu);
 142
 143         void (*free_entity)(struct dfu_entity *dfu);
 144
 145         struct list_head list;
 146
 147         /* on the fly state */
 148         u32 crc;
 149         u64 offset;
 150         int i_blk_seq_num;
 151         u8 *i_buf;
 152         u8 *i_buf_start;
 153         u8 *i_buf_end;
 154         u64 r_left;
 155         long b_left;
 156
 157         u32 bad_skip;   /* for nand use */
 158
 159         unsigned int inited:1;
 160 };
 161
 162 struct list_head;
 163 extern struct list_head dfu_list;
 164
 165 #ifdef CONFIG_SET_DFU_ALT_INFO
 166 /**
 167  * set_dfu_alt_info() - set dfu_alt_info environment variable
 168  *
 169  * If CONFIG_SET_DFU_ALT_INFO=y, this board specific function is called to set
 170  * environment variable dfu_alt_info.
 171  *
 172  * @interface:  dfu interface, e.g. "mmc" or "nand"
 173  * @devstr:     device number as string
 174  */
 175 void set_dfu_alt_info(char *interface, char *devstr);
 176 #endif
 177
 178 /**
 179  * dfu_alt_init() - initialize buffer for dfu entities
 180  *
 181  * @num:        number of entities
 182  * @dfu:        on return allocated buffer
 183  * Return:      0 on success
 184  */
 185 int dfu_alt_init(int num, struct dfu_entity **dfu);
 186
 187 /**
 188  * dfu_alt_add() - add alternate to dfu entity buffer
 189  *
 190  * @dfu:        dfu entity
 191  * @interface:  dfu interface, e.g. "mmc" or "nand"
 192  * @devstr:     device number as string
 193  * @s:          string description of alternate
 194  * Return:      0 on success
 195  */
 196 int dfu_alt_add(struct dfu_entity *dfu, char *interface, char *devstr, char *s);
 197
 198 /**
 199  * dfu_config_entities() - initialize dfu entitities from envirionment
 200  *
 201  * Initialize the list of dfu entities from environment variable dfu_alt_info.
 202  * The list must be freed by calling dfu_free_entities(). This function bypasses
 203  * set_dfu_alt_info(). So typically you should use dfu_init_env_entities()
 204  * instead.
 205  *
 206  * See function :c:func:`dfu_free_entities`
 207  * See function :c:func:`dfu_init_env_entities`
 208  *
 209  * @s:          string with alternates
 210  * @interface:  interface, e.g. "mmc" or "nand"
 211  * @devstr:     device number as string
 212  * Return:      0 on success, a negative error code otherwise
 213  */
 214 int dfu_config_entities(char *s, char *interface, char *devstr);
 215
 216 /**
 217  * dfu_free_entities() - free the list of dfu entities
 218  *
 219  * Free the internal list of dfu entities.
 220  *
 221  * See function :c:func:`dfu_init_env_entities`
 222  */
 223 void dfu_free_entities(void);
 224
 225 /**
 226  * dfu_show_entities() - print DFU alt settings list
 227  */
 228 void dfu_show_entities(void);
 229
 230 /**
 231  * dfu_get_alt_number() - get number of alternates
 232  *
 233  * Return: number of alternates in the dfu entities list
 234  */
 235 int dfu_get_alt_number(void);
 236
 237 /**
 238  * dfu_get_dev_type() - get string representation for dfu device type
 239  *
 240  * @type:       device type
 241  * Return:      string representation for device type
 242  */
 243 const char *dfu_get_dev_type(enum dfu_device_type type);
 244
 245 /**
 246  * dfu_get_layout() - get string describing layout
 247  *
 248  * Internally layouts are represented by enum dfu_device_type values. This
 249  * function translates an enum value to a human readable string, e.g. DFU_FS_FAT
 250  * is translated to "FAT".
 251  *
 252  * @layout:     layout
 253  * Result:      string representation for the layout
 254  */
 255 const char *dfu_get_layout(enum dfu_layout layout);
 256
 257 /**
 258  * dfu_get_entity() - get dfu entity for an alternate id
 259  *
 260  * @alt:        alternate id
 261  * Return:      dfu entity
 262  */
 263 struct dfu_entity *dfu_get_entity(int alt);
 264
 265 char *dfu_extract_token(char** e, int *n);
 266
 267 /**
 268  * dfu_get_alt() - get alternate id for filename
 269  *
 270  * Environment variable dfu_alt_info defines the write destinations (alternates)
 271  * for different filenames. This function get the index of the alternate for
 272  * a filename. If an absolute filename is provided (starting with '/'), the
 273  * directory path is ignored.
 274  *
 275  * @name:       filename
 276  * Return:      id of the alternate or negative error number (-ENODEV)
 277  */
 278 int dfu_get_alt(char *name);
 279
 280 /**
 281  * dfu_init_env_entities() - initialize dfu entitities from envirionment
 282  *
 283  * Initialize the list of dfu entities from environment variable dfu_alt_info.
 284  * The list must be freed by calling dfu_free_entities().
 285  * @interface and @devstr are used to select the relevant set of alternates
 286  * from environment variable dfu_alt_info.
 287  *
 288  * If environment variable dfu_alt_info specifies the interface and the device,
 289  * use NULL for @interface and @devstr.
 290  *
 291  * See function :c:func:`dfu_free_entities`
 292  *
 293  * @interface:  interface, e.g. "mmc" or "nand"
 294  * @devstr:     device number as string
 295  * Return:      0 on success, a negative error code otherwise
 296  */
 297 int dfu_init_env_entities(char *interface, char *devstr);
 298
 299 unsigned char *dfu_get_buf(struct dfu_entity *dfu);
 300 unsigned char *dfu_free_buf(void);
 301 unsigned long dfu_get_buf_size(void);
 302 bool dfu_usb_get_reset(void);
 303
 304 #ifdef CONFIG_DFU_TIMEOUT
 305 unsigned long dfu_get_timeout(void);
 306 void dfu_set_timeout(unsigned long);
 307 #endif
 308
 309 /**
 310  * dfu_read() - read from dfu entity
 311  *
 312  * The block sequence number @blk_seq_num is a 16 bit counter that must be
 313  * incremented with each call for the same dfu entity @de.
 314  *
 315  * @de:                 dfu entity
 316  * @buf:                buffer
 317  * @size:               size of buffer
 318  * @blk_seq_num:        block sequence number
 319  * Return:              0 for success, -1 for error
 320  */
 321 int dfu_read(struct dfu_entity *de, void *buf, int size, int blk_seq_num);
 322
 323 /**
 324  * dfu_write() - write to dfu entity
 325  *
 326  * Write the contents of a buffer @buf to the dfu entity @de. After writing
 327  * the last block call dfu_flush(). If a file is already loaded completely
 328  * into memory it is preferable to use dfu_write_from_mem_addr() which takes
 329  * care of blockwise transfer and flushing.
 330  *
 331  * The block sequence number @blk_seq_num is a 16 bit counter that must be
 332  * incremented with each call for the same dfu entity @de.
 333  *
 334  * See function :c:func:`dfu_flush`
 335  * See function :c:func:`dfu_write_from_mem_addr`
 336  *
 337  * @de:                 dfu entity
 338  * @buf:                buffer
 339  * @size:               size of buffer
 340  * @blk_seq_num:        block sequence number
 341  * Return:              0 for success, -1 for error
 342  */
 343 int dfu_write(struct dfu_entity *de, void *buf, int size, int blk_seq_num);
 344
 345 /**
 346  * dfu_flush() - flush to dfu entity
 347  *
 348  * This function has to be called after writing the last block to the dfu
 349  * entity @de.
 350  *
 351  * The block sequence number @blk_seq_num is a 16 bit counter that must be
 352  * incremented with each call for the same dfu entity @de.
 353  *
 354  * See function :c:func:`dfu_write`
 355  *
 356  * @de:                 dfu entity
 357  * @buf:                ignored
 358  * @size:               ignored
 359  * @blk_seq_num:        block sequence number of last write - ignored
 360  * Return:              0 for success, -1 for error
 361  */
 362 int dfu_flush(struct dfu_entity *de, void *buf, int size, int blk_seq_num);
 363
 364 /**
 365  * dfu_initiated_callback() - weak callback called on DFU transaction start
 366  *
 367  * It is a callback function called by DFU stack when a DFU transaction is
 368  * initiated. This function allows to manage some board specific behavior on
 369  * DFU targets.
 370  *
 371  * @dfu:        pointer to the dfu_entity, which should be initialized
 372  */
 373 void dfu_initiated_callback(struct dfu_entity *dfu);
 374
 375 /**
 376  * dfu_flush_callback() - weak callback called at the end of the DFU write
 377  *
 378  * It is a callback function called by DFU stack after DFU manifestation.
 379  * This function allows to manage some board specific behavior on DFU targets
 380  *
 381  * @dfu:        pointer to the dfu_entity, which should be flushed
 382  */
 383 void dfu_flush_callback(struct dfu_entity *dfu);
 384
 385 /**
 386  * dfu_error_callback() - weak callback called at the DFU write error
 387  *
 388  * It is a callback function called by DFU stack after DFU write error.
 389  * This function allows to manage some board specific behavior on DFU targets
 390  *
 391  * @dfu:        pointer to the dfu_entity which cause the error
 392  * @msg:        the message of the error
 393  */
 394 void dfu_error_callback(struct dfu_entity *dfu, const char *msg);
 395
 396 int dfu_transaction_initiate(struct dfu_entity *dfu, bool read);
 397 void dfu_transaction_cleanup(struct dfu_entity *dfu);
 398
 399 /*
 400  * dfu_defer_flush - pointer to store dfu_entity for deferred flashing.
 401  *                   It should be NULL when not used.
 402  */
 403 extern struct dfu_entity *dfu_defer_flush;
 404
 405 /**
 406  * dfu_get_defer_flush() - get current value of dfu_defer_flush pointer
 407  *
 408  * Return:      value of the dfu_defer_flush pointer
 409  */
 410 static inline struct dfu_entity *dfu_get_defer_flush(void)
 411 {
 412         return dfu_defer_flush;
 413 }
 414
 415 /**
 416  * dfu_set_defer_flush() - set the dfu_defer_flush pointer
 417  *
 418  * @dfu:        pointer to the dfu_entity, which should be written
 419  */
 420 static inline void dfu_set_defer_flush(struct dfu_entity *dfu)
 421 {
 422         dfu_defer_flush = dfu;
 423 }
 424
 425 /**
 426  * dfu_write_from_mem_addr() - write data from memory to DFU managed medium
 427  *
 428  * This function adds support for writing data starting from fixed memory
 429  * address (like $loadaddr) to dfu managed medium (e.g. NAND, MMC, file system)
 430  *
 431  * @dfu:        dfu entity to which we want to store data
 432  * @buf:        fixed memory address from where data starts
 433  * @size:       number of bytes to write
 434  *
 435  * Return:      0 on success, other value on failure
 436  */
 437 int dfu_write_from_mem_addr(struct dfu_entity *dfu, void *buf, int size);
 438
 439 /* Device specific */
 440 /* Each entity has 5 arguments in maximum. */
 441 #define DFU_MAX_ENTITY_ARGS     5
 442
 443 #if CONFIG_IS_ENABLED(DFU_MMC)
 444 extern int dfu_fill_entity_mmc(struct dfu_entity *dfu, char *devstr,
 445                                char **argv, int argc);
 446 #else
 447 static inline int dfu_fill_entity_mmc(struct dfu_entity *dfu, char *devstr,
 448                                       char **argv, int argc)
 449 {
 450         puts("MMC support not available!\n");
 451         return -1;
 452 }
 453 #endif
 454
 455 #if CONFIG_IS_ENABLED(DFU_NAND)
 456 extern int dfu_fill_entity_nand(struct dfu_entity *dfu, char *devstr,
 457                                 char **argv, int argc);
 458 #else
 459 static inline int dfu_fill_entity_nand(struct dfu_entity *dfu, char *devstr,
 460                                        char **argv, int argc)
 461 {
 462         puts("NAND support not available!\n");
 463         return -1;
 464 }
 465 #endif
 466
 467 #if CONFIG_IS_ENABLED(DFU_RAM)
 468 extern int dfu_fill_entity_ram(struct dfu_entity *dfu, char *devstr,
 469                                char **argv, int argc);
 470 #else
 471 static inline int dfu_fill_entity_ram(struct dfu_entity *dfu, char *devstr,
 472                                       char **argv, int argc)
 473 {
 474         puts("RAM support not available!\n");
 475         return -1;
 476 }
 477 #endif
 478
 479 #if CONFIG_IS_ENABLED(DFU_SF)
 480 extern int dfu_fill_entity_sf(struct dfu_entity *dfu, char *devstr,
 481                               char **argv, int argc);
 482 #else
 483 static inline int dfu_fill_entity_sf(struct dfu_entity *dfu, char *devstr,
 484                                      char **argv, int argc)
 485 {
 486         puts("SF support not available!\n");
 487         return -1;
 488 }
 489 #endif
 490
 491 #if CONFIG_IS_ENABLED(DFU_MTD)
 492 extern int dfu_fill_entity_mtd(struct dfu_entity *dfu, char *devstr,
 493                                char **argv, int argc);
 494 #else
 495 static inline int dfu_fill_entity_mtd(struct dfu_entity *dfu, char *devstr,
 496                                       char **argv, int argc)
 497 {
 498         puts("MTD support not available!\n");
 499         return -1;
 500 }
 501 #endif
 502
 503 #if CONFIG_IS_ENABLED(DFU_VIRT)
 504 int dfu_fill_entity_virt(struct dfu_entity *dfu, char *devstr,
 505                          char **argv, int argc);
 506 int dfu_write_medium_virt(struct dfu_entity *dfu, u64 offset,
 507                           void *buf, long *len);
 508 int dfu_get_medium_size_virt(struct dfu_entity *dfu, u64 *size);
 509 int dfu_read_medium_virt(struct dfu_entity *dfu, u64 offset,
 510                          void *buf, long *len);
 511 #else
 512 static inline int dfu_fill_entity_virt(struct dfu_entity *dfu, char *devstr,
 513                                        char **argv, int argc)
 514 {
 515         puts("VIRT support not available!\n");
 516         return -1;
 517 }
 518 #endif
 519
 520 extern bool dfu_reinit_needed;
 521
 522 #if CONFIG_IS_ENABLED(DFU_WRITE_ALT)
 523 /**
 524  * dfu_write_by_name() - write data to DFU medium
 525  * @dfu_entity_name:    Name of DFU entity to write
 526  * @addr:               Address of data buffer to write
 527  * @len:                Number of bytes
 528  * @interface:          Destination DFU medium (e.g. "mmc")
 529  * @devstring:          Instance number of destination DFU medium (e.g. "1")
 530  *
 531  * This function is storing data received on DFU supported medium which
 532  * is specified by @dfu_entity_name.
 533  *
 534  * Return:              0 - on success, error code - otherwise
 535  */
 536 int dfu_write_by_name(char *dfu_entity_name, void *addr,
 537                       unsigned int len, char *interface, char *devstring);
 538
 539 /**
 540  * dfu_write_by_alt() - write data to DFU medium
 541  * @dfu_alt_num:        DFU alt setting number
 542  * @addr:               Address of data buffer to write
 543  * @len:                Number of bytes
 544  * @interface:          Destination DFU medium (e.g. "mmc")
 545  * @devstring:          Instance number of destination DFU medium (e.g. "1")
 546  *
 547  * This function is storing data received on DFU supported medium which
 548  * is specified by @dfu_alt_name.
 549  *
 550  * Return:              0 - on success, error code - otherwise
 551  */
 552 int dfu_write_by_alt(int dfu_alt_num, void *addr, unsigned int len,
 553                      char *interface, char *devstring);
 554 #else
 555 static inline int dfu_write_by_name(char *dfu_entity_name, void *addr,
 556                                     unsigned int len, char *interface,
 557                                     char *devstring)
 558 {
 559         puts("write support for DFU not available!\n");
 560         return -ENOSYS;
 561 }
 562
 563 static inline int dfu_write_by_alt(int dfu_alt_num, void *addr,
 564                                    unsigned int len, char *interface,
 565                                    char *devstring)
 566 {
 567         puts("write support for DFU not available!\n");
 568         return -ENOSYS;
 569 }
 570 #endif
 571
 572 int dfu_add(struct usb_configuration *c);
 573 #endif /* __DFU_ENTITY_H_ */