src/flash/nand/driver.h

   1 /***************************************************************************
   2  *   Copyright (C) 2005 by Dominic Rath <Dominic.Rath@gmx.de>              *
   3  *   Copyright (C) 2007,2008 Øyvind Harboe <oyvind.harboe@zylin.com>       *
   4  *   Copyright (C) 2008 by Spencer Oliver <spen@spen-soft.co.uk>           *
   5  *   Copyright (C) 2009 Zachary T Welch <zw@superlucidity.net>             *
   6  *                                                                         *
   7  *   This program is free software; you can redistribute it and/or modify  *
   8  *   it under the terms of the GNU General Public License as published by  *
   9  *   the Free Software Foundation; either version 2 of the License, or     *
  10  *   (at your option) any later version.                                   *
  11  *                                                                         *
  12  *   This program is distributed in the hope that it will be useful,       *
  13  *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
  14  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
  15  *   GNU General Public License for more details.                          *
  16  *                                                                         *
  17  *   You should have received a copy of the GNU General Public License     *
  18  *   along with this program; if not, write to the                         *
  19  *   Free Software Foundation, Inc.,                                       *
  20  *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
  21  ***************************************************************************/
  22
  23 #ifndef FLASH_NAND_DRIVER_H
  24 #define FLASH_NAND_DRIVER_H
  25
  26 struct nand_device;
  27
  28 #define __NAND_DEVICE_COMMAND(name) \
  29         COMMAND_HELPER(name, struct nand_device *nand)
  30
  31 /**
  32  * Interface for NAND flash controllers.  Not all of these functions are
  33  * required for full functionality of the NAND driver, but better performance
  34  * can be achieved by implementing each function.
  35  */
  36 struct nand_flash_controller {
  37         /** Driver name that is used to select it from configuration files. */
  38         const char *name;
  39
  40         /** Usage of flash command registration. */
  41         const char *usage;
  42
  43         const struct command_registration *commands;
  44
  45         /** NAND device command called when driver is instantiated during configuration. */
  46         __NAND_DEVICE_COMMAND((*nand_device_command));
  47
  48         /** Initialize the NAND device. */
  49         int (*init)(struct nand_device *nand);
  50
  51         /** Reset the NAND device. */
  52         int (*reset)(struct nand_device *nand);
  53
  54         /** Issue a command to the NAND device. */
  55         int (*command)(struct nand_device *nand, uint8_t command);
  56
  57         /** Write an address to the NAND device. */
  58         int (*address)(struct nand_device *nand, uint8_t address);
  59
  60         /** Write word of data to the NAND device. */
  61         int (*write_data)(struct nand_device *nand, uint16_t data);
  62
  63         /** Read word of data from the NAND device. */
  64         int (*read_data)(struct nand_device *nand, void *data);
  65
  66         /** Write a block of data to the NAND device. */
  67         int (*write_block_data)(struct nand_device *nand, uint8_t *data, int size);
  68
  69         /** Read a block of data from the NAND device. */
  70         int (*read_block_data)(struct nand_device *nand, uint8_t *data, int size);
  71
  72         /** Write a page to the NAND device. */
  73         int (*write_page)(struct nand_device *nand, uint32_t page, uint8_t *data,
  74                           uint32_t data_size, uint8_t *oob, uint32_t oob_size);
  75
  76         /** Read a page from the NAND device. */
  77         int (*read_page)(struct nand_device *nand, uint32_t page, uint8_t *data, uint32_t data_size,
  78                          uint8_t *oob, uint32_t oob_size);
  79
  80         /** Check if the NAND device is ready for more instructions with timeout. */
  81         int (*nand_ready)(struct nand_device *nand, int timeout);
  82 };
  83
  84 #define NAND_DEVICE_COMMAND_HANDLER(name) static __NAND_DEVICE_COMMAND(name)
  85
  86 /**
  87  * Find a NAND flash controller by name.
  88  * @param name Identifies the NAND controller to find.
  89  * @returns The nand_flash_controller named @c name, or NULL if not found.
  90  */
  91 struct nand_flash_controller *nand_driver_find_by_name(const char *name);
  92
  93 /** Signature for callback functions passed to nand_driver_walk */
  94 typedef int (*nand_driver_walker_t)(struct nand_flash_controller *c, void *);
  95 /**
  96  * Walk the list of drivers, encapsulating the data structure type.
  97  * Application state/context can be passed through the @c x pointer.
  98  * @param f The callback function to invoke for each function.
  99  * @param x For use as private data storate, passed directly to @c f.
 100  * @returns ERROR_OK if successful, or the non-zero return value of @c f.
 101  * This allows a walker to terminate the loop early.
 102  */
 103 int nand_driver_walk(nand_driver_walker_t f, void *x);
 104
 105 #endif  /* FLASH_NAND_DRIVER_H */