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/list.h>
15 #include <spi_flash.h>
16 #include <linux/usb/composite.h>
18 enum dfu_device_type {
45 struct mmc_internal_data {
49 unsigned int lba_start;
50 unsigned int lba_size;
51 unsigned int lba_blk_size;
53 /* eMMC HW partition access */
61 struct mtd_internal_data {
62 struct mtd_info *info;
67 /* for ubi partition */
71 struct nand_internal_data {
78 /* for nand/ubi use */
82 struct ram_internal_data {
87 struct sf_internal_data {
88 struct spi_flash *dev;
97 struct virt_internal_data {
102 #if defined(CONFIG_DFU_NAME_MAX_SIZE)
103 #define DFU_NAME_SIZE CONFIG_DFU_NAME_MAX_SIZE
105 #define DFU_NAME_SIZE 32
107 #ifndef DFU_DEFAULT_POLL_TIMEOUT
108 #define DFU_DEFAULT_POLL_TIMEOUT 0
110 #ifndef DFU_MANIFEST_POLL_TIMEOUT
111 #define DFU_MANIFEST_POLL_TIMEOUT DFU_DEFAULT_POLL_TIMEOUT
115 char name[DFU_NAME_SIZE];
118 enum dfu_device_type dev_type;
119 enum dfu_layout layout;
120 unsigned long max_buf_size;
123 struct mmc_internal_data mmc;
124 struct mtd_internal_data mtd;
125 struct nand_internal_data nand;
126 struct ram_internal_data ram;
127 struct sf_internal_data sf;
128 struct virt_internal_data virt;
131 int (*get_medium_size)(struct dfu_entity *dfu, u64 *size);
133 int (*read_medium)(struct dfu_entity *dfu,
134 u64 offset, void *buf, long *len);
136 int (*write_medium)(struct dfu_entity *dfu,
137 u64 offset, void *buf, long *len);
139 int (*flush_medium)(struct dfu_entity *dfu);
140 unsigned int (*poll_timeout)(struct dfu_entity *dfu);
142 void (*free_entity)(struct dfu_entity *dfu);
144 struct list_head list;
146 /* on the fly state */
156 u32 bad_skip; /* for nand use */
158 unsigned int inited:1;
162 extern struct list_head dfu_list;
164 #ifdef CONFIG_SET_DFU_ALT_INFO
166 * set_dfu_alt_info() - set dfu_alt_info environment variable
168 * If CONFIG_SET_DFU_ALT_INFO=y, this board specific function is called to set
169 * environment variable dfu_alt_info.
171 * @interface: dfu interface, e.g. "mmc" or "nand"
172 * @devstr: device number as string
174 void set_dfu_alt_info(char *interface, char *devstr);
178 * dfu_alt_init() - initialize buffer for dfu entities
180 * @num: number of entities
181 * @dfu: on return allocated buffer
182 * Return: 0 on success
184 int dfu_alt_init(int num, struct dfu_entity **dfu);
187 * dfu_alt_add() - add alternate to dfu entity buffer
190 * @interface: dfu interface, e.g. "mmc" or "nand"
191 * @devstr: device number as string
192 * @s: string description of alternate
193 * Return: 0 on success
195 int dfu_alt_add(struct dfu_entity *dfu, char *interface, char *devstr, char *s);
198 * dfu_config_entities() - initialize dfu entitities from envirionment
200 * Initialize the list of dfu entities from environment variable dfu_alt_info.
201 * The list must be freed by calling dfu_free_entities(). This function bypasses
202 * set_dfu_alt_info(). So typically you should use dfu_init_env_entities()
205 * See function :c:func:`dfu_free_entities`
206 * See function :c:func:`dfu_init_env_entities`
208 * @s: string with alternates
209 * @interface: interface, e.g. "mmc" or "nand"
210 * @devstr: device number as string
211 * Return: 0 on success, a negative error code otherwise
213 int dfu_config_entities(char *s, char *interface, char *devstr);
216 * dfu_free_entities() - free the list of dfu entities
218 * Free the internal list of dfu entities.
220 * See function :c:func:`dfu_init_env_entities`
222 void dfu_free_entities(void);
225 * dfu_show_entities() - print DFU alt settings list
227 void dfu_show_entities(void);
230 * dfu_get_alt_number() - get number of alternates
232 * Return: number of alternates in the dfu entities list
234 int dfu_get_alt_number(void);
237 * dfu_get_dev_type() - get string representation for dfu device type
240 * Return: string representation for device type
242 const char *dfu_get_dev_type(enum dfu_device_type type);
245 * dfu_get_layout() - get string describing layout
247 * Internally layouts are represented by enum dfu_device_type values. This
248 * function translates an enum value to a human readable string, e.g. DFU_FS_FAT
249 * is translated to "FAT".
252 * Result: string representation for the layout
254 const char *dfu_get_layout(enum dfu_layout layout);
257 * dfu_get_entity() - get dfu entity for an alternate id
262 struct dfu_entity *dfu_get_entity(int alt);
264 char *dfu_extract_token(char** e, int *n);
267 * dfu_get_alt() - get alternate id for filename
269 * Environment variable dfu_alt_info defines the write destinations (alternates)
270 * for different filenames. This function get the index of the alternate for
271 * a filename. If an absolute filename is provided (starting with '/'), the
272 * directory path is ignored.
275 * Return: id of the alternate or negative error number (-ENODEV)
277 int dfu_get_alt(char *name);
280 * dfu_init_env_entities() - initialize dfu entitities from envirionment
282 * Initialize the list of dfu entities from environment variable dfu_alt_info.
283 * The list must be freed by calling dfu_free_entities().
284 * @interface and @devstr are used to select the relevant set of alternates
285 * from environment variable dfu_alt_info.
287 * If environment variable dfu_alt_info specifies the interface and the device,
288 * use NULL for @interface and @devstr.
290 * See function :c:func:`dfu_free_entities`
292 * @interface: interface, e.g. "mmc" or "nand"
293 * @devstr: device number as string
294 * Return: 0 on success, a negative error code otherwise
296 int dfu_init_env_entities(char *interface, char *devstr);
298 unsigned char *dfu_get_buf(struct dfu_entity *dfu);
299 unsigned char *dfu_free_buf(void);
300 unsigned long dfu_get_buf_size(void);
301 bool dfu_usb_get_reset(void);
303 #ifdef CONFIG_DFU_TIMEOUT
304 unsigned long dfu_get_timeout(void);
305 void dfu_set_timeout(unsigned long);
309 * dfu_read() - read from dfu entity
311 * The block sequence number @blk_seq_num is a 16 bit counter that must be
312 * incremented with each call for the same dfu entity @de.
316 * @size: size of buffer
317 * @blk_seq_num: block sequence number
318 * Return: 0 for success, -1 for error
320 int dfu_read(struct dfu_entity *de, void *buf, int size, int blk_seq_num);
323 * dfu_write() - write to dfu entity
325 * Write the contents of a buffer @buf to the dfu entity @de. After writing
326 * the last block call dfu_flush(). If a file is already loaded completely
327 * into memory it is preferable to use dfu_write_from_mem_addr() which takes
328 * care of blockwise transfer and flushing.
330 * The block sequence number @blk_seq_num is a 16 bit counter that must be
331 * incremented with each call for the same dfu entity @de.
333 * See function :c:func:`dfu_flush`
334 * See function :c:func:`dfu_write_from_mem_addr`
338 * @size: size of buffer
339 * @blk_seq_num: block sequence number
340 * Return: 0 for success, -1 for error
342 int dfu_write(struct dfu_entity *de, void *buf, int size, int blk_seq_num);
345 * dfu_flush() - flush to dfu entity
347 * This function has to be called after writing the last block to the dfu
350 * The block sequence number @blk_seq_num is a 16 bit counter that must be
351 * incremented with each call for the same dfu entity @de.
353 * See function :c:func:`dfu_write`
358 * @blk_seq_num: block sequence number of last write - ignored
359 * Return: 0 for success, -1 for error
361 int dfu_flush(struct dfu_entity *de, void *buf, int size, int blk_seq_num);
364 * dfu_initiated_callback() - weak callback called on DFU transaction start
366 * It is a callback function called by DFU stack when a DFU transaction is
367 * initiated. This function allows to manage some board specific behavior on
370 * @dfu: pointer to the dfu_entity, which should be initialized
372 void dfu_initiated_callback(struct dfu_entity *dfu);
375 * dfu_flush_callback() - weak callback called at the end of the DFU write
377 * It is a callback function called by DFU stack after DFU manifestation.
378 * This function allows to manage some board specific behavior on DFU targets
380 * @dfu: pointer to the dfu_entity, which should be flushed
382 void dfu_flush_callback(struct dfu_entity *dfu);
385 * dfu_error_callback() - weak callback called at the DFU write error
387 * It is a callback function called by DFU stack after DFU write error.
388 * This function allows to manage some board specific behavior on DFU targets
390 * @dfu: pointer to the dfu_entity which cause the error
391 * @msg: the message of the error
393 void dfu_error_callback(struct dfu_entity *dfu, const char *msg);
395 int dfu_transaction_initiate(struct dfu_entity *dfu, bool read);
396 void dfu_transaction_cleanup(struct dfu_entity *dfu);
399 * dfu_defer_flush - pointer to store dfu_entity for deferred flashing.
400 * It should be NULL when not used.
402 extern struct dfu_entity *dfu_defer_flush;
405 * dfu_get_defer_flush() - get current value of dfu_defer_flush pointer
407 * Return: value of the dfu_defer_flush pointer
409 static inline struct dfu_entity *dfu_get_defer_flush(void)
411 return dfu_defer_flush;
415 * dfu_set_defer_flush() - set the dfu_defer_flush pointer
417 * @dfu: pointer to the dfu_entity, which should be written
419 static inline void dfu_set_defer_flush(struct dfu_entity *dfu)
421 dfu_defer_flush = dfu;
425 * dfu_write_from_mem_addr() - write data from memory to DFU managed medium
427 * This function adds support for writing data starting from fixed memory
428 * address (like $loadaddr) to dfu managed medium (e.g. NAND, MMC, file system)
430 * @dfu: dfu entity to which we want to store data
431 * @buf: fixed memory address from where data starts
432 * @size: number of bytes to write
434 * Return: 0 on success, other value on failure
436 int dfu_write_from_mem_addr(struct dfu_entity *dfu, void *buf, int size);
438 /* Device specific */
439 /* Each entity has 5 arguments in maximum. */
440 #define DFU_MAX_ENTITY_ARGS 5
442 #if CONFIG_IS_ENABLED(DFU_MMC)
443 extern int dfu_fill_entity_mmc(struct dfu_entity *dfu, char *devstr,
444 char **argv, int argc);
446 static inline int dfu_fill_entity_mmc(struct dfu_entity *dfu, char *devstr,
447 char **argv, int argc)
449 puts("MMC support not available!\n");
454 #if CONFIG_IS_ENABLED(DFU_NAND)
455 extern int dfu_fill_entity_nand(struct dfu_entity *dfu, char *devstr,
456 char **argv, int argc);
458 static inline int dfu_fill_entity_nand(struct dfu_entity *dfu, char *devstr,
459 char **argv, int argc)
461 puts("NAND support not available!\n");
466 #if CONFIG_IS_ENABLED(DFU_RAM)
467 extern int dfu_fill_entity_ram(struct dfu_entity *dfu, char *devstr,
468 char **argv, int argc);
470 static inline int dfu_fill_entity_ram(struct dfu_entity *dfu, char *devstr,
471 char **argv, int argc)
473 puts("RAM support not available!\n");
478 #if CONFIG_IS_ENABLED(DFU_SF)
479 extern int dfu_fill_entity_sf(struct dfu_entity *dfu, char *devstr,
480 char **argv, int argc);
482 static inline int dfu_fill_entity_sf(struct dfu_entity *dfu, char *devstr,
483 char **argv, int argc)
485 puts("SF support not available!\n");
490 #if CONFIG_IS_ENABLED(DFU_MTD)
491 extern int dfu_fill_entity_mtd(struct dfu_entity *dfu, char *devstr,
492 char **argv, int argc);
494 static inline int dfu_fill_entity_mtd(struct dfu_entity *dfu, char *devstr,
495 char **argv, int argc)
497 puts("MTD support not available!\n");
502 #if CONFIG_IS_ENABLED(DFU_VIRT)
503 int dfu_fill_entity_virt(struct dfu_entity *dfu, char *devstr,
504 char **argv, int argc);
505 int dfu_write_medium_virt(struct dfu_entity *dfu, u64 offset,
506 void *buf, long *len);
507 int dfu_get_medium_size_virt(struct dfu_entity *dfu, u64 *size);
508 int dfu_read_medium_virt(struct dfu_entity *dfu, u64 offset,
509 void *buf, long *len);
511 static inline int dfu_fill_entity_virt(struct dfu_entity *dfu, char *devstr,
512 char **argv, int argc)
514 puts("VIRT support not available!\n");
519 extern bool dfu_reinit_needed;
521 #if CONFIG_IS_ENABLED(DFU_WRITE_ALT)
523 * dfu_write_by_name() - write data to DFU medium
524 * @dfu_entity_name: Name of DFU entity to write
525 * @addr: Address of data buffer to write
526 * @len: Number of bytes
527 * @interface: Destination DFU medium (e.g. "mmc")
528 * @devstring: Instance number of destination DFU medium (e.g. "1")
530 * This function is storing data received on DFU supported medium which
531 * is specified by @dfu_entity_name.
533 * Return: 0 - on success, error code - otherwise
535 int dfu_write_by_name(char *dfu_entity_name, void *addr,
536 unsigned int len, char *interface, char *devstring);
539 * dfu_write_by_alt() - write data to DFU medium
540 * @dfu_alt_num: DFU alt setting number
541 * @addr: Address of data buffer to write
542 * @len: Number of bytes
543 * @interface: Destination DFU medium (e.g. "mmc")
544 * @devstring: Instance number of destination DFU medium (e.g. "1")
546 * This function is storing data received on DFU supported medium which
547 * is specified by @dfu_alt_name.
549 * Return: 0 - on success, error code - otherwise
551 int dfu_write_by_alt(int dfu_alt_num, void *addr, unsigned int len,
552 char *interface, char *devstring);
554 static inline int dfu_write_by_name(char *dfu_entity_name, void *addr,
555 unsigned int len, char *interface,
558 puts("write support for DFU not available!\n");
562 static inline int dfu_write_by_alt(int dfu_alt_num, void *addr,
563 unsigned int len, char *interface,
566 puts("write support for DFU not available!\n");
571 int dfu_add(struct usb_configuration *c);
572 #endif /* __DFU_ENTITY_H_ */