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/***************************************************************************
* Copyright (C) 2005 by Dominic Rath <Dominic.Rath@gmx.de> *
* Copyright (C) 2007,2008 Øyvind Harboe <oyvind.harboe@zylin.com> *
* Copyright (C) 2008 by Spencer Oliver <spen@spen-soft.co.uk> *
* Copyright (C) 2009 Zachary T Welch <zw@superlucidity.net> *
* *
* 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., *
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. *
***************************************************************************/
#ifndef FLASH_NAND_DRIVER_H
#define FLASH_NAND_DRIVER_H
struct nand_device;
#define __NAND_DEVICE_COMMAND(name) \
COMMAND_HELPER(name, struct nand_device *nand)
/**
* Interface for NAND flash controllers. Not all of these functions are
* required for full functionality of the NAND driver, but better performance
* can be achieved by implementing each function.
*/
struct nand_flash_controller {
/** Driver name that is used to select it from configuration files. */
const char *name;
/** Usage of flash command registration. */
const char *usage;
const struct command_registration *commands;
/** NAND device command called when driver is instantiated during configuration. */
__NAND_DEVICE_COMMAND((*nand_device_command));
/** Initialize the NAND device. */
int (*init)(struct nand_device *nand);
/** Reset the NAND device. */
int (*reset)(struct nand_device *nand);
/** Issue a command to the NAND device. */
int (*command)(struct nand_device *nand, uint8_t command);
/** Write an address to the NAND device. */
int (*address)(struct nand_device *nand, uint8_t address);
/** Write word of data to the NAND device. */
int (*write_data)(struct nand_device *nand, uint16_t data);
/** Read word of data from the NAND device. */
int (*read_data)(struct nand_device *nand, void *data);
/** Write a block of data to the NAND device. */
int (*write_block_data)(struct nand_device *nand, uint8_t *data, int size);
/** Read a block of data from the NAND device. */
int (*read_block_data)(struct nand_device *nand, uint8_t *data, int size);
/** Write a page to the NAND device. */
int (*write_page)(struct nand_device *nand, uint32_t page, uint8_t *data,
uint32_t data_size, uint8_t *oob, uint32_t oob_size);
/** Read a page from the NAND device. */
int (*read_page)(struct nand_device *nand, uint32_t page, uint8_t *data, uint32_t data_size,
uint8_t *oob, uint32_t oob_size);
/** Check if the NAND device is ready for more instructions with timeout. */
int (*nand_ready)(struct nand_device *nand, int timeout);
};
#define NAND_DEVICE_COMMAND_HANDLER(name) static __NAND_DEVICE_COMMAND(name)
/**
* Find a NAND flash controller by name.
* @param name Identifies the NAND controller to find.
* @returns The nand_flash_controller named @c name, or NULL if not found.
*/
struct nand_flash_controller *nand_driver_find_by_name(const char *name);
/** Signature for callback functions passed to nand_driver_walk */
typedef int (*nand_driver_walker_t)(struct nand_flash_controller *c, void *);
/**
* Walk the list of drivers, encapsulating the data structure type.
* Application state/context can be passed through the @c x pointer.
* @param f The callback function to invoke for each function.
* @param x For use as private data storate, passed directly to @c f.
* @returns ERROR_OK if successful, or the non-zero return value of @c f.
* This allows a walker to terminate the loop early.
*/
int nand_driver_walk(nand_driver_walker_t f, void *x);
#endif /* FLASH_NAND_DRIVER_H */
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