/*************************************************************************** * Copyright (C) 2005 by Dominic Rath * * Copyright (C) 2007,2008 Øyvind Harboe * * Copyright (C) 2008 by Spencer Oliver * * Copyright (C) 2009 Zachary T Welch * * Copyright (C) 2010 by Antonio Borneo * * * * This program is free software; you can redistribute it and/or modify * * it under the terms of the GNU General Public License as published by * * the Free Software Foundation; either version 2 of the License, or * * (at your option) any later version. * * * * This program is distributed in the hope that it will be useful, * * but WITHOUT ANY WARRANTY; without even the implied warranty of * * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * * GNU General Public License for more details. * * * * You should have received a copy of the GNU General Public License * * along with this program; if not, write to the * * Free Software Foundation, Inc., * * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. * ***************************************************************************/ #ifndef FLASH_NOR_CORE_H #define FLASH_NOR_CORE_H #include /** * @file * Upper level NOR flash interfaces. */ struct image; #define FLASH_MAX_ERROR_STR (128) /** * Describes the geometry and status of a single flash sector * within a flash bank. A single bank typically consists of multiple * sectors, each of which can be erased and protected independently. */ struct flash_sector { /// Bus offset from start of the flash chip (in bytes). uint32_t offset; /// Number of bytes in this flash sector. uint32_t size; /** * Indication of erasure status: 0 = not erased, 1 = erased, * other = unknown. Set by @c flash_driver_s::erase_check. */ int is_erased; /** * Indication of protection status: 0 = unprotected/unlocked, * 1 = protected/locked, other = unknown. Set by * @c flash_driver_s::protect_check. * * This information must be considered stale immediately. * A million things could make it stale: power cycle, * reset of target, code running on target, etc. */ int is_protected; }; /** * Provides details of a flash bank, available either on-chip or through * a major interface. * * This structure will be passed as a parameter to the callbacks in the * flash_driver_s structure, some of which may modify the contents of * this structure of the area of flash that it defines. Driver writers * may use the @c driver_priv member to store additional data on a * per-bank basis, if required. */ struct flash_bank { char *name; struct target *target; /**< Target to which this bank belongs. */ struct flash_driver *driver; /**< Driver for this bank. */ void *driver_priv; /**< Private driver storage pointer */ int bank_number; /**< The 'bank' (or chip number) of this instance. */ uint32_t base; /**< The base address of this bank */ uint32_t size; /**< The size of this chip bank, in bytes */ int chip_width; /**< Width of the chip in bytes (1,2,4 bytes) */ int bus_width; /**< Maximum bus width, in bytes (1,2,4 bytes) */ /** * The number of sectors on this chip. This value will * be set intially to 0, and the flash driver must set this to * some non-zero value during "probe()" or "auto_probe()". */ int num_sectors; /// Array of sectors, allocated and initilized by the flash driver struct flash_sector *sectors; struct flash_bank *next; /**< The next flash bank on this chip */ }; /// Registers the 'flash' subsystem commands int flash_register_commands(struct command_context *cmd_ctx); /** * Erases @a length bytes in the @a target flash, starting at @a addr. * The range @a addr to @a addr + @a length - 1 must be strictly * sector aligned, unless @a pad is true. Setting @a pad true extends * the range, at beginning and/or end, if needed for sector alignment. * @returns ERROR_OK if successful; otherwise, an error code. */ int flash_erase_address_range(struct target *target, bool pad, uint32_t addr, uint32_t length); int flash_unlock_address_range(struct target *target, uint32_t addr, uint32_t length); /** * Writes @a image into the @a target flash. The @a written parameter * will contain the * @param target The target with the flash to be programmed. * @param image The image that will be programmed to flash. * @param written On return, contains the number of bytes written. * @param erase If non-zero, indicates the flash driver should first * erase the corresponding banks or sectors before programming. * @returns ERROR_OK if successful; otherwise, an error code. */ int flash_write(struct target *target, struct image *image, uint32_t *written, int erase); /** * Forces targets to re-examine their erase/protection state. * This routine must be called when the system may modify the status. */ void flash_set_dirty(void); /// @returns The number of flash banks currently defined. int flash_get_bank_count(void); /** * Provides default read implementation for flash memory. * @param bank The bank to read. * @param buffer The data bytes read. * @param offset The offset into the chip to read. * @param count The number of bytes to read. * @returns ERROR_OK if successful; otherwise, an error code. */ int default_flash_read(struct flash_bank *bank, uint8_t *buffer, uint32_t offset, uint32_t count); /** * Provides default erased-bank check handling. Checks to see if * the flash driver knows they are erased; if things look uncertain, * this routine will call default_flash_mem_blank_check() to confirm. * @returns ERROR_OK if successful; otherwise, an error code. */ int default_flash_blank_check(struct flash_bank *bank); /** * Provides a default blank flash memory check. Ensures the contents * of the given bank have truly been erased. * @param bank The flash bank. * @returns ERROR_OK if successful; otherwise, an error code. */ int default_flash_mem_blank_check(struct flash_bank *bank); /** * Returns the flash bank specified by @a name, which matches the * driver name and a suffix (option) specify the driver-specific * bank number. The suffix consists of the '.' and the driver-specific * bank number: when two str9x banks are defined, then 'str9x.1' refers * to the second. */ struct flash_bank *get_flash_bank_by_name(const char *name); /** * Returns the flash bank specified by @a name, which matches the * driver name and a suffix (option) specify the driver-specific * bank number. The suffix consists of the '.' and the driver-specific * bank number: when two str9x banks are defined, then 'str9x.1' refers * to the second. */ struct flash_bank *get_flash_bank_by_name_noprobe(const char *name); /** * Returns the flash bank like get_flash_bank_by_name(), without probing. * @param num The flash bank number. * @param bank returned bank if fn returns ERROR_OK * @returns ERROR_OK if successful */ int get_flash_bank_by_num(int num, struct flash_bank **bank); /** * Retreives @a bank from a command argument, reporting errors parsing * the bank identifier or retreiving the specified bank. The bank * may be identified by its bank number or by @c name.instance, where * @a instance is driver-specific. * @param name_index The index to the string in args containing the * bank identifier. * @param bank On output, contians a pointer to the bank or NULL. * @returns ERROR_OK on success, or an error indicating the problem. */ COMMAND_HELPER(flash_command_get_bank, unsigned name_index, struct flash_bank **bank); /** * Returns the flash bank like get_flash_bank_by_num(), without probing. * @param num The flash bank number. * @returns A struct flash_bank for flash bank @a num, or NULL. */ struct flash_bank *get_flash_bank_by_num_noprobe(int num); /** * Returns the flash bank located at a specified address. * @param target The target, presumed to contain one or more banks. * @param addr An address that is within the range of the bank. * @returns The struct flash_bank located at @a addr, or NULL. */ struct flash_bank *get_flash_bank_by_addr(struct target *target, uint32_t addr); #endif // FLASH_NOR_CORE_H