/*
   * dfu.h - DFU flashable area description
   *
   * Copyright (C) 2012 Samsung Electronics
   * authors: Andrzej Pietrasiewicz <andrzej.p@samsung.com>
   *	    Lukasz Majewski <l.majewski@samsung.com>
   *

   * SPDX-License-Identifier:	GPL-2.0+

   */
  
  #ifndef __DFU_ENTITY_H_
  #define __DFU_ENTITY_H_
  
  #include <common.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,

  };
  
  enum dfu_layout {
  	DFU_RAW_ADDR = 1,
  	DFU_FS_FAT,
  	DFU_FS_EXT2,
  	DFU_FS_EXT3,
  	DFU_FS_EXT4,

  	DFU_RAM_ADDR,

  };

  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 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 {
  	void		*start;
  	unsigned int	size;
  };

  struct sf_internal_data {
  	struct spi_flash *dev;
  
  	/* RAW programming */
  	u64 start;
  	u64 size;
  };

  #define DFU_NAME_SIZE			32
  #define DFU_CMD_BUF_SIZE		128

  #ifndef CONFIG_SYS_DFU_DATA_BUF_SIZE
  #define CONFIG_SYS_DFU_DATA_BUF_SIZE		(1024*1024*8)	/* 8 MiB */
  #endif

  #ifndef CONFIG_SYS_DFU_MAX_FILE_SIZE

  #define CONFIG_SYS_DFU_MAX_FILE_SIZE CONFIG_SYS_DFU_DATA_BUF_SIZE

  #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 nand_internal_data nand;

  		struct ram_internal_data ram;

  		struct sf_internal_data sf;

  	} 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;

  };

  #ifdef CONFIG_SET_DFU_ALT_INFO
  void set_dfu_alt_info(char *interface, char *devstr);
  #endif

  int dfu_config_entities(char *s, char *interface, char *devstr);

  void dfu_free_entities(void);
  void dfu_show_entities(void);
  int dfu_get_alt_number(void);
  const char *dfu_get_dev_type(enum dfu_device_type t);
  const char *dfu_get_layout(enum dfu_layout l);
  struct dfu_entity *dfu_get_entity(int alt);
  char *dfu_extract_token(char** e, int *n);

  void dfu_trigger_reset(void);

  int dfu_get_alt(char *name);

  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);

  
  int dfu_read(struct dfu_entity *de, void *buf, int size, int blk_seq_num);
  int dfu_write(struct dfu_entity *de, void *buf, int size, int blk_seq_num);

  int dfu_flush(struct dfu_entity *de, void *buf, int size, int blk_seq_num);

  /*
   * 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
   *
   * @param 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)
   *
   * @param dfu - dfu entity to which we want to store data
   * @param buf - fixed memory addres from where data starts
   * @param 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 */
  #ifdef CONFIG_DFU_MMC

  extern int dfu_fill_entity_mmc(struct dfu_entity *dfu, char *devstr, char *s);

  #else

  static inline int dfu_fill_entity_mmc(struct dfu_entity *dfu, char *devstr,
  				      char *s)

  {
  	puts("MMC support not available!
  ");
  	return -1;
  }
  #endif

  
  #ifdef CONFIG_DFU_NAND

  extern int dfu_fill_entity_nand(struct dfu_entity *dfu, char *devstr, char *s);

  #else

  static inline int dfu_fill_entity_nand(struct dfu_entity *dfu, char *devstr,
  				       char *s)

  {
  	puts("NAND support not available!
  ");
  	return -1;
  }
  #endif

  #ifdef CONFIG_DFU_RAM

  extern int dfu_fill_entity_ram(struct dfu_entity *dfu, char *devstr, char *s);

  #else

  static inline int dfu_fill_entity_ram(struct dfu_entity *dfu, char *devstr,
  				      char *s)

  {
  	puts("RAM support not available!
  ");
  	return -1;
  }
  #endif

  #ifdef CONFIG_DFU_SF
  extern int dfu_fill_entity_sf(struct dfu_entity *dfu, char *devstr, char *s);
  #else
  static inline int dfu_fill_entity_sf(struct dfu_entity *dfu, char *devstr,
  				     char *s)
  {
  	puts("SF support not available!
  ");
  	return -1;
  }
  #endif

  /**
   * dfu_tftp_write - Write TFTP data to DFU medium
   *
   * This function is storing data received via TFTP on DFU supported medium.
   *
   * @param dfu_entity_name - name of DFU entity to write
   * @param addr - address of data buffer to write
   * @param len - number of bytes
   * @param interface - destination DFU medium (e.g. "mmc")
   * @param devstring - instance number of destination DFU medium (e.g. "1")
   *
   * @return 0 on success, otherwise error code
   */
  #ifdef CONFIG_DFU_TFTP
  int dfu_tftp_write(char *dfu_entity_name, unsigned int addr, unsigned int len,
  		   char *interface, char *devstring);
  #else
  static inline int dfu_tftp_write(char *dfu_entity_name, unsigned int addr,
  				 unsigned int len, char *interface,
  				 char *devstring)
  {
  	puts("TFTP write support for DFU not available!
  ");
  	return -ENOSYS;
  }
  #endif

  int dfu_add(struct usb_configuration *c);

  #endif /* __DFU_ENTITY_H_ */