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/* SPDX-License-Identifier: GPL-2.0+ */
/*
* dfu.h - DFU flashable area description
*
* Copyright (C) 2012 Samsung Electronics
* authors: Andrzej Pietrasiewicz <andrzej.p@samsung.com>
* Lukasz Majewski <l.majewski@samsung.com>
*/
#ifndef __DFU_ENTITY_H_
#define __DFU_ENTITY_H_
#include <linux/errno.h>
#include <linux/list.h>
#include <mmc.h>
#include <spi_flash.h>
#include <linux/usb/composite.h>
enum dfu_device_type {
DFU_DEV_MMC = 1,
DFU_DEV_ONENAND,
DFU_DEV_NAND,
DFU_DEV_RAM,
DFU_DEV_SF,
DFU_DEV_MTD,
DFU_DEV_VIRT,
};
enum dfu_layout {
DFU_RAW_ADDR = 1,
DFU_FS_FAT,
DFU_FS_EXT2,
DFU_FS_EXT3,
DFU_FS_EXT4,
DFU_RAM_ADDR,
DFU_SKIP,
DFU_SCRIPT,
};
enum dfu_op {
DFU_OP_READ = 1,
DFU_OP_WRITE,
DFU_OP_SIZE,
};
struct mmc_internal_data {
int dev_num;
/* RAW programming */
unsigned int lba_start;
unsigned int lba_size;
unsigned int lba_blk_size;
/* eMMC HW partition access */
int hw_partition;
/* FAT/EXT */
unsigned int dev;
unsigned int part;
};
struct mtd_internal_data {
struct mtd_info *info;
/* RAW programming */
u64 start;
u64 size;
/* for ubi partition */
unsigned int ubi;
};
struct nand_internal_data {
/* RAW programming */
u64 start;
u64 size;
unsigned int dev;
unsigned int part;
/* for nand/ubi use */
unsigned int ubi;
};
struct ram_internal_data {
unsigned long start;
unsigned int size;
};
struct sf_internal_data {
struct spi_flash *dev;
/* RAW programming */
u64 start;
u64 size;
/* for sf/ubi use */
unsigned int ubi;
};
struct virt_internal_data {
int dev_num;
};
#if defined(CONFIG_DFU_NAME_MAX_SIZE)
#define DFU_NAME_SIZE CONFIG_DFU_NAME_MAX_SIZE
#else
#define DFU_NAME_SIZE 32
#endif
#ifndef DFU_DEFAULT_POLL_TIMEOUT
#define DFU_DEFAULT_POLL_TIMEOUT 0
#endif
#ifndef DFU_MANIFEST_POLL_TIMEOUT
#define DFU_MANIFEST_POLL_TIMEOUT DFU_DEFAULT_POLL_TIMEOUT
#endif
struct dfu_entity {
char name[DFU_NAME_SIZE];
int alt;
void *dev_private;
enum dfu_device_type dev_type;
enum dfu_layout layout;
unsigned long max_buf_size;
union {
struct mmc_internal_data mmc;
struct mtd_internal_data mtd;
struct nand_internal_data nand;
struct ram_internal_data ram;
struct sf_internal_data sf;
struct virt_internal_data virt;
} data;
int (*get_medium_size)(struct dfu_entity *dfu, u64 *size);
int (*read_medium)(struct dfu_entity *dfu,
u64 offset, void *buf, long *len);
int (*write_medium)(struct dfu_entity *dfu,
u64 offset, void *buf, long *len);
int (*flush_medium)(struct dfu_entity *dfu);
unsigned int (*poll_timeout)(struct dfu_entity *dfu);
void (*free_entity)(struct dfu_entity *dfu);
struct list_head list;
/* on the fly state */
u32 crc;
u64 offset;
int i_blk_seq_num;
u8 *i_buf;
u8 *i_buf_start;
u8 *i_buf_end;
u64 r_left;
long b_left;
u32 bad_skip; /* for nand use */
unsigned int inited:1;
};
struct list_head;
extern struct list_head dfu_list;
#ifdef CONFIG_SET_DFU_ALT_INFO
/**
* set_dfu_alt_info() - set dfu_alt_info environment variable
*
* If CONFIG_SET_DFU_ALT_INFO=y, this board specific function is called to set
* environment variable dfu_alt_info.
*
* @interface: dfu interface, e.g. "mmc" or "nand"
* @devstr: device number as string
*/
void set_dfu_alt_info(char *interface, char *devstr);
#endif
/**
* dfu_alt_init() - initialize buffer for dfu entities
*
* @num: number of entities
* @dfu: on return allocated buffer
* Return: 0 on success
*/
int dfu_alt_init(int num, struct dfu_entity **dfu);
/**
* dfu_alt_add() - add alternate to dfu entity buffer
*
* @dfu: dfu entity
* @interface: dfu interface, e.g. "mmc" or "nand"
* @devstr: device number as string
* @s: string description of alternate
* Return: 0 on success
*/
int dfu_alt_add(struct dfu_entity *dfu, char *interface, char *devstr, char *s);
/**
* dfu_config_entities() - initialize dfu entitities from envirionment
*
* Initialize the list of dfu entities from environment variable dfu_alt_info.
* The list must be freed by calling dfu_free_entities(). This function bypasses
* set_dfu_alt_info(). So typically you should use dfu_init_env_entities()
* instead.
*
* See function :c:func:`dfu_free_entities`
* See function :c:func:`dfu_init_env_entities`
*
* @s: string with alternates
* @interface: interface, e.g. "mmc" or "nand"
* @devstr: device number as string
* Return: 0 on success, a negative error code otherwise
*/
int dfu_config_entities(char *s, char *interface, char *devstr);
/**
* dfu_free_entities() - free the list of dfu entities
*
* Free the internal list of dfu entities.
*
* See function :c:func:`dfu_init_env_entities`
*/
void dfu_free_entities(void);
/**
* dfu_show_entities() - print DFU alt settings list
*/
void dfu_show_entities(void);
/**
* dfu_get_alt_number() - get number of alternates
*
* Return: number of alternates in the dfu entities list
*/
int dfu_get_alt_number(void);
/**
* dfu_get_dev_type() - get string representation for dfu device type
*
* @type: device type
* Return: string representation for device type
*/
const char *dfu_get_dev_type(enum dfu_device_type type);
/**
* dfu_get_layout() - get string describing layout
*
* Internally layouts are represented by enum dfu_device_type values. This
* function translates an enum value to a human readable string, e.g. DFU_FS_FAT
* is translated to "FAT".
*
* @layout: layout
* Result: string representation for the layout
*/
const char *dfu_get_layout(enum dfu_layout layout);
/**
* dfu_get_entity() - get dfu entity for an alternate id
*
* @alt: alternate id
* Return: dfu entity
*/
struct dfu_entity *dfu_get_entity(int alt);
char *dfu_extract_token(char** e, int *n);
/**
* dfu_get_alt() - get alternate id for filename
*
* Environment variable dfu_alt_info defines the write destinations (alternates)
* for different filenames. This function get the index of the alternate for
* a filename. If an absolute filename is provided (starting with '/'), the
* directory path is ignored.
*
* @name: filename
* Return: id of the alternate or negative error number (-ENODEV)
*/
int dfu_get_alt(char *name);
/**
* dfu_init_env_entities() - initialize dfu entitities from envirionment
*
* Initialize the list of dfu entities from environment variable dfu_alt_info.
* The list must be freed by calling dfu_free_entities().
* @interface and @devstr are used to select the relevant set of alternates
* from environment variable dfu_alt_info.
*
* If environment variable dfu_alt_info specifies the interface and the device,
* use NULL for @interface and @devstr.
*
* See function :c:func:`dfu_free_entities`
*
* @interface: interface, e.g. "mmc" or "nand"
* @devstr: device number as string
* Return: 0 on success, a negative error code otherwise
*/
int dfu_init_env_entities(char *interface, char *devstr);
unsigned char *dfu_get_buf(struct dfu_entity *dfu);
unsigned char *dfu_free_buf(void);
unsigned long dfu_get_buf_size(void);
bool dfu_usb_get_reset(void);
#ifdef CONFIG_DFU_TIMEOUT
unsigned long dfu_get_timeout(void);
void dfu_set_timeout(unsigned long);
#endif
/**
* dfu_read() - read from dfu entity
*
* The block sequence number @blk_seq_num is a 16 bit counter that must be
* incremented with each call for the same dfu entity @de.
*
* @de: dfu entity
* @buf: buffer
* @size: size of buffer
* @blk_seq_num: block sequence number
* Return: 0 for success, -1 for error
*/
int dfu_read(struct dfu_entity *de, void *buf, int size, int blk_seq_num);
/**
* dfu_write() - write to dfu entity
*
* Write the contents of a buffer @buf to the dfu entity @de. After writing
* the last block call dfu_flush(). If a file is already loaded completely
* into memory it is preferable to use dfu_write_from_mem_addr() which takes
* care of blockwise transfer and flushing.
*
* The block sequence number @blk_seq_num is a 16 bit counter that must be
* incremented with each call for the same dfu entity @de.
*
* See function :c:func:`dfu_flush`
* See function :c:func:`dfu_write_from_mem_addr`
*
* @de: dfu entity
* @buf: buffer
* @size: size of buffer
* @blk_seq_num: block sequence number
* Return: 0 for success, -1 for error
*/
int dfu_write(struct dfu_entity *de, void *buf, int size, int blk_seq_num);
/**
* dfu_flush() - flush to dfu entity
*
* This function has to be called after writing the last block to the dfu
* entity @de.
*
* The block sequence number @blk_seq_num is a 16 bit counter that must be
* incremented with each call for the same dfu entity @de.
*
* See function :c:func:`dfu_write`
*
* @de: dfu entity
* @buf: ignored
* @size: ignored
* @blk_seq_num: block sequence number of last write - ignored
* Return: 0 for success, -1 for error
*/
int dfu_flush(struct dfu_entity *de, void *buf, int size, int blk_seq_num);
/**
* dfu_initiated_callback() - weak callback called on DFU transaction start
*
* It is a callback function called by DFU stack when a DFU transaction is
* initiated. This function allows to manage some board specific behavior on
* DFU targets.
*
* @dfu: pointer to the dfu_entity, which should be initialized
*/
void dfu_initiated_callback(struct dfu_entity *dfu);
/**
* dfu_flush_callback() - weak callback called at the end of the DFU write
*
* It is a callback function called by DFU stack after DFU manifestation.
* This function allows to manage some board specific behavior on DFU targets
*
* @dfu: pointer to the dfu_entity, which should be flushed
*/
void dfu_flush_callback(struct dfu_entity *dfu);
/**
* dfu_error_callback() - weak callback called at the DFU write error
*
* It is a callback function called by DFU stack after DFU write error.
* This function allows to manage some board specific behavior on DFU targets
*
* @dfu: pointer to the dfu_entity which cause the error
* @msg: the message of the error
*/
void dfu_error_callback(struct dfu_entity *dfu, const char *msg);
int dfu_transaction_initiate(struct dfu_entity *dfu, bool read);
void dfu_transaction_cleanup(struct dfu_entity *dfu);
/*
* dfu_defer_flush - pointer to store dfu_entity for deferred flashing.
* It should be NULL when not used.
*/
extern struct dfu_entity *dfu_defer_flush;
/**
* dfu_get_defer_flush() - get current value of dfu_defer_flush pointer
*
* Return: value of the dfu_defer_flush pointer
*/
static inline struct dfu_entity *dfu_get_defer_flush(void)
{
return dfu_defer_flush;
}
/**
* dfu_set_defer_flush() - set the dfu_defer_flush pointer
*
* @dfu: pointer to the dfu_entity, which should be written
*/
static inline void dfu_set_defer_flush(struct dfu_entity *dfu)
{
dfu_defer_flush = dfu;
}
/**
* dfu_write_from_mem_addr() - write data from memory to DFU managed medium
*
* This function adds support for writing data starting from fixed memory
* address (like $loadaddr) to dfu managed medium (e.g. NAND, MMC, file system)
*
* @dfu: dfu entity to which we want to store data
* @buf: fixed memory address from where data starts
* @size: number of bytes to write
*
* Return: 0 on success, other value on failure
*/
int dfu_write_from_mem_addr(struct dfu_entity *dfu, void *buf, int size);
/* Device specific */
/* Each entity has 5 arguments in maximum. */
#define DFU_MAX_ENTITY_ARGS 5
#if CONFIG_IS_ENABLED(DFU_MMC)
extern int dfu_fill_entity_mmc(struct dfu_entity *dfu, char *devstr,
char **argv, int argc);
#else
static inline int dfu_fill_entity_mmc(struct dfu_entity *dfu, char *devstr,
char **argv, int argc)
{
puts("MMC support not available!\n");
return -1;
}
#endif
#if CONFIG_IS_ENABLED(DFU_NAND)
extern int dfu_fill_entity_nand(struct dfu_entity *dfu, char *devstr,
char **argv, int argc);
#else
static inline int dfu_fill_entity_nand(struct dfu_entity *dfu, char *devstr,
char **argv, int argc)
{
puts("NAND support not available!\n");
return -1;
}
#endif
#if CONFIG_IS_ENABLED(DFU_RAM)
extern int dfu_fill_entity_ram(struct dfu_entity *dfu, char *devstr,
char **argv, int argc);
#else
static inline int dfu_fill_entity_ram(struct dfu_entity *dfu, char *devstr,
char **argv, int argc)
{
puts("RAM support not available!\n");
return -1;
}
#endif
#if CONFIG_IS_ENABLED(DFU_SF)
extern int dfu_fill_entity_sf(struct dfu_entity *dfu, char *devstr,
char **argv, int argc);
#else
static inline int dfu_fill_entity_sf(struct dfu_entity *dfu, char *devstr,
char **argv, int argc)
{
puts("SF support not available!\n");
return -1;
}
#endif
#if CONFIG_IS_ENABLED(DFU_MTD)
extern int dfu_fill_entity_mtd(struct dfu_entity *dfu, char *devstr,
char **argv, int argc);
#else
static inline int dfu_fill_entity_mtd(struct dfu_entity *dfu, char *devstr,
char **argv, int argc)
{
puts("MTD support not available!\n");
return -1;
}
#endif
#if CONFIG_IS_ENABLED(DFU_VIRT)
int dfu_fill_entity_virt(struct dfu_entity *dfu, char *devstr,
char **argv, int argc);
int dfu_write_medium_virt(struct dfu_entity *dfu, u64 offset,
void *buf, long *len);
int dfu_get_medium_size_virt(struct dfu_entity *dfu, u64 *size);
int dfu_read_medium_virt(struct dfu_entity *dfu, u64 offset,
void *buf, long *len);
#else
static inline int dfu_fill_entity_virt(struct dfu_entity *dfu, char *devstr,
char **argv, int argc)
{
puts("VIRT support not available!\n");
return -1;
}
#endif
extern bool dfu_reinit_needed;
#if CONFIG_IS_ENABLED(DFU_WRITE_ALT)
/**
* dfu_write_by_name() - write data to DFU medium
* @dfu_entity_name: Name of DFU entity to write
* @addr: Address of data buffer to write
* @len: Number of bytes
* @interface: Destination DFU medium (e.g. "mmc")
* @devstring: Instance number of destination DFU medium (e.g. "1")
*
* This function is storing data received on DFU supported medium which
* is specified by @dfu_entity_name.
*
* Return: 0 - on success, error code - otherwise
*/
int dfu_write_by_name(char *dfu_entity_name, void *addr,
unsigned int len, char *interface, char *devstring);
/**
* dfu_write_by_alt() - write data to DFU medium
* @dfu_alt_num: DFU alt setting number
* @addr: Address of data buffer to write
* @len: Number of bytes
* @interface: Destination DFU medium (e.g. "mmc")
* @devstring: Instance number of destination DFU medium (e.g. "1")
*
* This function is storing data received on DFU supported medium which
* is specified by @dfu_alt_name.
*
* Return: 0 - on success, error code - otherwise
*/
int dfu_write_by_alt(int dfu_alt_num, void *addr, unsigned int len,
char *interface, char *devstring);
#else
static inline int dfu_write_by_name(char *dfu_entity_name, void *addr,
unsigned int len, char *interface,
char *devstring)
{
puts("write support for DFU not available!\n");
return -ENOSYS;
}
static inline int dfu_write_by_alt(int dfu_alt_num, void *addr,
unsigned int len, char *interface,
char *devstring)
{
puts("write support for DFU not available!\n");
return -ENOSYS;
}
#endif
int dfu_add(struct usb_configuration *c);
#endif /* __DFU_ENTITY_H_ */