1 /* SPDX-License-Identifier: GPL-2.0+ */
3 * dfu.h - DFU flashable area description
5 * Copyright (C) 2012 Samsung Electronics
10 #ifndef __DFU_ENTITY_H_
11 #define __DFU_ENTITY_H_
13 #include <linux/errno.h>
14 #include <linux/list.h>
16 #include <spi_flash.h>
17 #include <linux/usb/composite.h>
19 enum dfu_device_type {
46 struct mmc_internal_data {
50 unsigned int lba_start;
51 unsigned int lba_size;
52 unsigned int lba_blk_size;
54 /* eMMC HW partition access */
62 struct mtd_internal_data {
63 struct mtd_info *info;
68 /* for ubi partition */
72 struct nand_internal_data {
79 /* for nand/ubi use */
83 struct ram_internal_data {
88 struct sf_internal_data {
89 struct spi_flash *dev;
98 struct virt_internal_data {
103 #if defined(CONFIG_DFU_NAME_MAX_SIZE)
104 #define DFU_NAME_SIZE CONFIG_DFU_NAME_MAX_SIZE
106 #define DFU_NAME_SIZE 32
108 #ifndef DFU_DEFAULT_POLL_TIMEOUT
109 #define DFU_DEFAULT_POLL_TIMEOUT 0
111 #ifndef DFU_MANIFEST_POLL_TIMEOUT
112 #define DFU_MANIFEST_POLL_TIMEOUT DFU_DEFAULT_POLL_TIMEOUT
116 char name[DFU_NAME_SIZE];
119 enum dfu_device_type dev_type;
120 enum dfu_layout layout;
121 unsigned long max_buf_size;
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;
132 int (*get_medium_size)(struct dfu_entity *dfu, u64 *size);
134 int (*read_medium)(struct dfu_entity *dfu,
135 u64 offset, void *buf, long *len);
137 int (*write_medium)(struct dfu_entity *dfu,
138 u64 offset, void *buf, long *len);
140 int (*flush_medium)(struct dfu_entity *dfu);
141 unsigned int (*poll_timeout)(struct dfu_entity *dfu);
143 void (*free_entity)(struct dfu_entity *dfu);
145 struct list_head list;
147 /* on the fly state */
157 u32 bad_skip; /* for nand use */
159 unsigned int inited:1;
163 extern struct list_head dfu_list;
165 #ifdef CONFIG_SET_DFU_ALT_INFO
167 * set_dfu_alt_info() - set dfu_alt_info environment variable
169 * If CONFIG_SET_DFU_ALT_INFO=y, this board specific function is called to set
170 * environment variable dfu_alt_info.
172 * @interface: dfu interface, e.g. "mmc" or "nand"
173 * @devstr: device number as string
175 void set_dfu_alt_info(char *interface, char *devstr);
179 * dfu_alt_init() - initialize buffer for dfu entities
181 * @num: number of entities
182 * @dfu: on return allocated buffer
183 * Return: 0 on success
185 int dfu_alt_init(int num, struct dfu_entity **dfu);
188 * dfu_alt_add() - add alternate to dfu entity buffer
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
196 int dfu_alt_add(struct dfu_entity *dfu, char *interface, char *devstr, char *s);
199 * dfu_config_entities() - initialize dfu entitities from envirionment
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()
206 * See function :c:func:`dfu_free_entities`
207 * See function :c:func:`dfu_init_env_entities`
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
214 int dfu_config_entities(char *s, char *interface, char *devstr);
217 * dfu_free_entities() - free the list of dfu entities
219 * Free the internal list of dfu entities.
221 * See function :c:func:`dfu_init_env_entities`
223 void dfu_free_entities(void);
226 * dfu_show_entities() - print DFU alt settings list
228 void dfu_show_entities(void);
231 * dfu_get_alt_number() - get number of alternates
233 * Return: number of alternates in the dfu entities list
235 int dfu_get_alt_number(void);
238 * dfu_get_dev_type() - get string representation for dfu device type
241 * Return: string representation for device type
243 const char *dfu_get_dev_type(enum dfu_device_type type);
246 * dfu_get_layout() - get string describing layout
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".
253 * Result: string representation for the layout
255 const char *dfu_get_layout(enum dfu_layout layout);
258 * dfu_get_entity() - get dfu entity for an alternate id
263 struct dfu_entity *dfu_get_entity(int alt);
265 char *dfu_extract_token(char** e, int *n);
268 * dfu_get_alt() - get alternate id for filename
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.
276 * Return: id of the alternate or negative error number (-ENODEV)
278 int dfu_get_alt(char *name);
281 * dfu_init_env_entities() - initialize dfu entitities from envirionment
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.
288 * If environment variable dfu_alt_info specifies the interface and the device,
289 * use NULL for @interface and @devstr.
291 * See function :c:func:`dfu_free_entities`
293 * @interface: interface, e.g. "mmc" or "nand"
294 * @devstr: device number as string
295 * Return: 0 on success, a negative error code otherwise
297 int dfu_init_env_entities(char *interface, char *devstr);
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);
304 #ifdef CONFIG_DFU_TIMEOUT
305 unsigned long dfu_get_timeout(void);
306 void dfu_set_timeout(unsigned long);
310 * dfu_read() - read from dfu entity
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.
317 * @size: size of buffer
318 * @blk_seq_num: block sequence number
319 * Return: 0 for success, -1 for error
321 int dfu_read(struct dfu_entity *de, void *buf, int size, int blk_seq_num);
324 * dfu_write() - write to dfu entity
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.
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.
334 * See function :c:func:`dfu_flush`
335 * See function :c:func:`dfu_write_from_mem_addr`
339 * @size: size of buffer
340 * @blk_seq_num: block sequence number
341 * Return: 0 for success, -1 for error
343 int dfu_write(struct dfu_entity *de, void *buf, int size, int blk_seq_num);
346 * dfu_flush() - flush to dfu entity
348 * This function has to be called after writing the last block to the dfu
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.
354 * See function :c:func:`dfu_write`
359 * @blk_seq_num: block sequence number of last write - ignored
360 * Return: 0 for success, -1 for error
362 int dfu_flush(struct dfu_entity *de, void *buf, int size, int blk_seq_num);
365 * dfu_initiated_callback() - weak callback called on DFU transaction start
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
371 * @dfu: pointer to the dfu_entity, which should be initialized
373 void dfu_initiated_callback(struct dfu_entity *dfu);
376 * dfu_flush_callback() - weak callback called at the end of the DFU write
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
381 * @dfu: pointer to the dfu_entity, which should be flushed
383 void dfu_flush_callback(struct dfu_entity *dfu);
386 * dfu_error_callback() - weak callback called at the DFU write error
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
391 * @dfu: pointer to the dfu_entity which cause the error
392 * @msg: the message of the error
394 void dfu_error_callback(struct dfu_entity *dfu, const char *msg);
396 int dfu_transaction_initiate(struct dfu_entity *dfu, bool read);
397 void dfu_transaction_cleanup(struct dfu_entity *dfu);
400 * dfu_defer_flush - pointer to store dfu_entity for deferred flashing.
401 * It should be NULL when not used.
403 extern struct dfu_entity *dfu_defer_flush;
406 * dfu_get_defer_flush() - get current value of dfu_defer_flush pointer
408 * Return: value of the dfu_defer_flush pointer
410 static inline struct dfu_entity *dfu_get_defer_flush(void)
412 return dfu_defer_flush;
416 * dfu_set_defer_flush() - set the dfu_defer_flush pointer
418 * @dfu: pointer to the dfu_entity, which should be written
420 static inline void dfu_set_defer_flush(struct dfu_entity *dfu)
422 dfu_defer_flush = dfu;
426 * dfu_write_from_mem_addr() - write data from memory to DFU managed medium
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)
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
435 * Return: 0 on success, other value on failure
437 int dfu_write_from_mem_addr(struct dfu_entity *dfu, void *buf, int size);
439 /* Device specific */
440 /* Each entity has 5 arguments in maximum. */
441 #define DFU_MAX_ENTITY_ARGS 5
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);
447 static inline int dfu_fill_entity_mmc(struct dfu_entity *dfu, char *devstr,
448 char **argv, int argc)
450 puts("MMC support not available!\n");
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);
459 static inline int dfu_fill_entity_nand(struct dfu_entity *dfu, char *devstr,
460 char **argv, int argc)
462 puts("NAND support not available!\n");
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);
471 static inline int dfu_fill_entity_ram(struct dfu_entity *dfu, char *devstr,
472 char **argv, int argc)
474 puts("RAM support not available!\n");
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);
483 static inline int dfu_fill_entity_sf(struct dfu_entity *dfu, char *devstr,
484 char **argv, int argc)
486 puts("SF support not available!\n");
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);
495 static inline int dfu_fill_entity_mtd(struct dfu_entity *dfu, char *devstr,
496 char **argv, int argc)
498 puts("MTD support not available!\n");
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);
512 static inline int dfu_fill_entity_virt(struct dfu_entity *dfu, char *devstr,
513 char **argv, int argc)
515 puts("VIRT support not available!\n");
520 extern bool dfu_reinit_needed;
522 #if CONFIG_IS_ENABLED(DFU_WRITE_ALT)
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")
531 * This function is storing data received on DFU supported medium which
532 * is specified by @dfu_entity_name.
534 * Return: 0 - on success, error code - otherwise
536 int dfu_write_by_name(char *dfu_entity_name, void *addr,
537 unsigned int len, char *interface, char *devstring);
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")
547 * This function is storing data received on DFU supported medium which
548 * is specified by @dfu_alt_name.
550 * Return: 0 - on success, error code - otherwise
552 int dfu_write_by_alt(int dfu_alt_num, void *addr, unsigned int len,
553 char *interface, char *devstring);
555 static inline int dfu_write_by_name(char *dfu_entity_name, void *addr,
556 unsigned int len, char *interface,
559 puts("write support for DFU not available!\n");
563 static inline int dfu_write_by_alt(int dfu_alt_num, void *addr,
564 unsigned int len, char *interface,
567 puts("write support for DFU not available!\n");
572 int dfu_add(struct usb_configuration *c);
573 #endif /* __DFU_ENTITY_H_ */