linux/platform_data/mtd-nand-s3c2410.h

0001 /* SPDX-License-Identifier: GPL-2.0-only */
0002 /*
0003  * Copyright (c) 2004 Simtec Electronics
0004  *  Ben Dooks <ben@simtec.co.uk>
0005  *
0006  * S3C2410 - NAND device controller platform_device info
0007 */
0008
0009 #ifndef __MTD_NAND_S3C2410_H
0010 #define __MTD_NAND_S3C2410_H
0011
0012 #include <linux/mtd/rawnand.h>
0013
0014 /**
0015  * struct s3c2410_nand_set - define a set of one or more nand chips
0016  * @flash_bbt:      Openmoko u-boot can create a Bad Block Table
0017  *          Setting this flag will allow the kernel to
0018  *          look for it at boot time and also skip the NAND
0019  *          scan.
0020  * @options:        Default value to set into 'struct nand_chip' options.
0021  * @nr_chips:       Number of chips in this set
0022  * @nr_partitions:  Number of partitions pointed to by @partitions
0023  * @name:       Name of set (optional)
0024  * @nr_map:     Map for low-layer logical to physical chip numbers (option)
0025  * @partitions:     The mtd partition list
0026  *
0027  * define a set of one or more nand chips registered with an unique mtd. Also
0028  * allows to pass flag to the underlying NAND layer. 'disable_ecc' will trigger
0029  * a warning at boot time.
0030  */
0031 struct s3c2410_nand_set {
0032     unsigned int        flash_bbt:1;
0033
0034     unsigned int        options;
0035     int         nr_chips;
0036     int         nr_partitions;
0037     char            *name;
0038     int         *nr_map;
0039     struct mtd_partition    *partitions;
0040     struct device_node  *of_node;
0041 };
0042
0043 struct s3c2410_platform_nand {
0044     /* timing information for controller, all times in nanoseconds */
0045
0046     int tacls;  /* time for active CLE/ALE to nWE/nOE */
0047     int twrph0; /* active time for nWE/nOE */
0048     int twrph1; /* time for release CLE/ALE from nWE/nOE inactive */
0049
0050     unsigned int    ignore_unset_ecc:1;
0051
0052     enum nand_ecc_engine_type engine_type;
0053
0054     int         nr_sets;
0055     struct s3c2410_nand_set *sets;
0056
0057     void            (*select_chip)(struct s3c2410_nand_set *,
0058                            int chip);
0059 };
0060
0061 /**
0062  * s3c_nand_set_platdata() - register NAND platform data.
0063  * @nand: The NAND platform data to register with s3c_device_nand.
0064  *
0065  * This function copies the given NAND platform data, @nand and registers
0066  * it with the s3c_device_nand. This allows @nand to be __initdata.
0067 */
0068 extern void s3c_nand_set_platdata(struct s3c2410_platform_nand *nand);
0069
0070 #endif /*__MTD_NAND_S3C2410_H */