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> *
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. *
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. *
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 #ifndef FLASH_NAND_DRIVER_H
23 #define FLASH_NAND_DRIVER_H
27 #define __NAND_DEVICE_COMMAND(name) \
28 COMMAND_HELPER(name, struct nand_device *nand)
31 * Interface for NAND flash controllers. Not all of these functions are
32 * required for full functionality of the NAND driver, but better performance
33 * can be achieved by implementing each function.
35 struct nand_flash_controller
37 /** Driver name that is used to select it from configuration files. */
40 const struct command_registration
*commands
;
42 /** NAND device command called when driver is instantiated during configuration. */
43 __NAND_DEVICE_COMMAND((*nand_device_command
));
45 /** Initialize the NAND device. */
46 int (*init
)(struct nand_device
*nand
);
48 /** Reset the NAND device. */
49 int (*reset
)(struct nand_device
*nand
);
51 /** Issue a command to the NAND device. */
52 int (*command
)(struct nand_device
*nand
, uint8_t command
);
54 /** Write an address to the NAND device. */
55 int (*address
)(struct nand_device
*nand
, uint8_t address
);
57 /** Write word of data to the NAND device. */
58 int (*write_data
)(struct nand_device
*nand
, uint16_t data
);
60 /** Read word of data from the NAND device. */
61 int (*read_data
)(struct nand_device
*nand
, void *data
);
63 /** Write a block of data to the NAND device. */
64 int (*write_block_data
)(struct nand_device
*nand
, uint8_t *data
, int size
);
66 /** Read a block of data from the NAND device. */
67 int (*read_block_data
)(struct nand_device
*nand
, uint8_t *data
, int size
);
69 /** Write a page to the NAND device. */
70 int (*write_page
)(struct nand_device
*nand
, uint32_t page
, uint8_t *data
, uint32_t data_size
, uint8_t *oob
, uint32_t oob_size
);
72 /** Read a page from the NAND device. */
73 int (*read_page
)(struct nand_device
*nand
, uint32_t page
, uint8_t *data
, uint32_t data_size
, uint8_t *oob
, uint32_t oob_size
);
75 /** Check if the NAND device is ready for more instructions with timeout. */
76 int (*nand_ready
)(struct nand_device
*nand
, int timeout
);
79 #define NAND_DEVICE_COMMAND_HANDLER(name) static __NAND_DEVICE_COMMAND(name)
82 * Find a NAND flash controller by name.
83 * @param name Identifies the NAND controller to find.
84 * @returns The nand_flash_controller named @c name, or NULL if not found.
86 struct nand_flash_controller
*nand_driver_find_by_name(const char *name
);
88 /// Signature for callback functions passed to nand_driver_walk
89 typedef int (*nand_driver_walker_t
)(struct nand_flash_controller
*c
, void*);
91 * Walk the list of drivers, encapsulating the data structure type.
92 * Application state/context can be passed through the @c x pointer.
93 * @param f The callback function to invoke for each function.
94 * @param x For use as private data storate, passed directly to @c f.
95 * @returns ERROR_OK if successful, or the non-zero return value of @c f.
96 * This allows a walker to terminate the loop early.
98 int nand_driver_walk(nand_driver_walker_t f
, void *x
);
100 #endif // FLASH_NAND_DRIVER_H