Linux Kernel  3.7.1
 All Data Structures Namespaces Files Functions Variables Typedefs Enumerations Enumerator Macros Groups Pages
mtd-davinci.h
Go to the documentation of this file.
1 /*
2  * mach-davinci/nand.h
3  *
4  * Copyright © 2006 Texas Instruments.
5  *
6  * Ported to 2.6.23 Copyright © 2008 by
7  * Sander Huijsen <[email protected]>
8  * Troy Kisky <[email protected]>
9  * Dirk Behme <[email protected]>
10  *
11  * --------------------------------------------------------------------------
12  *
13  * This program is free software; you can redistribute it and/or modify
14  * it under the terms of the GNU General Public License as published by
15  * the Free Software Foundation; either version 2 of the License, or
16  * (at your option) any later version.
17  *
18  * This program is distributed in the hope that it will be useful,
19  * but WITHOUT ANY WARRANTY; without even the implied warranty of
20  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
21  * GNU General Public License for more details.
22  *
23  * You should have received a copy of the GNU General Public License
24  * along with this program; if not, write to the Free Software
25  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
26  */
27 
28 #ifndef __ARCH_ARM_DAVINCI_NAND_H
29 #define __ARCH_ARM_DAVINCI_NAND_H
30 
31 #include <linux/mtd/nand.h>
32 
33 #define NANDFCR_OFFSET 0x60
34 #define NANDFSR_OFFSET 0x64
35 #define NANDF1ECC_OFFSET 0x70
36 
37 /* 4-bit ECC syndrome registers */
38 #define NAND_4BIT_ECC_LOAD_OFFSET 0xbc
39 #define NAND_4BIT_ECC1_OFFSET 0xc0
40 #define NAND_4BIT_ECC2_OFFSET 0xc4
41 #define NAND_4BIT_ECC3_OFFSET 0xc8
42 #define NAND_4BIT_ECC4_OFFSET 0xcc
43 #define NAND_ERR_ADD1_OFFSET 0xd0
44 #define NAND_ERR_ADD2_OFFSET 0xd4
45 #define NAND_ERR_ERRVAL1_OFFSET 0xd8
46 #define NAND_ERR_ERRVAL2_OFFSET 0xdc
47 
48 /* NOTE: boards don't need to use these address bits
49  * for ALE/CLE unless they support booting from NAND.
50  * They're used unless platform data overrides them.
51  */
52 #define MASK_ALE 0x08
53 #define MASK_CLE 0x10
54 
55 struct davinci_nand_pdata { /* platform_data */
58 
59  /* for packages using two chipselects */
61 
62  /* board's default static partition info */
64  unsigned nr_parts;
65 
66  /* none == NAND_ECC_NONE (strongly *not* advised!!)
67  * soft == NAND_ECC_SOFT
68  * else == NAND_ECC_HW, according to ecc_bits
69  *
70  * All DaVinci-family chips support 1-bit hardware ECC.
71  * Newer ones also support 4-bit ECC, but are awkward
72  * using it with large page chips.
73  */
76 
77  /* e.g. NAND_BUSWIDTH_16 */
78  unsigned options;
79  /* e.g. NAND_BBT_USE_FLASH */
80  unsigned bbt_options;
81 
82  /* Main and mirror bbt descriptor overrides */
85 
86  /* Access timings */
88 };
89 
90 #endif /* __ARCH_ARM_DAVINCI_NAND_H */