1 /* 2 * linux/include/linux/mtd/onenand.h 3 * 4 * Copyright (C) 2005-2007 Samsung Electronics 5 * Kyungmin Park <kyungmin.park@samsung.com> 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 version 2 as 9 * published by the Free Software Foundation. 10 */ 11 12 #ifndef __LINUX_MTD_ONENAND_H 13 #define __LINUX_MTD_ONENAND_H 14 15 #include <linux/mtd/onenand_regs.h> 16 17 /* Note: The header order is impoertant */ 18 #include <onenand_uboot.h> 19 20 #include <linux/mtd/compat.h> 21 #include <linux/mtd/bbm.h> 22 23 #define MAX_DIES 2 24 #define MAX_BUFFERRAM 2 25 #define MAX_ONENAND_PAGESIZE (4096 + 128) 26 27 /* Scan and identify a OneNAND device */ 28 extern int onenand_scan (struct mtd_info *mtd, int max_chips); 29 /* Free resources held by the OneNAND device */ 30 extern void onenand_release (struct mtd_info *mtd); 31 32 /** 33 * struct onenand_bufferram - OneNAND BufferRAM Data 34 * @param blockpage block & page address in BufferRAM 35 */ 36 struct onenand_bufferram { 37 int blockpage; 38 }; 39 40 /** 41 * struct onenand_chip - OneNAND Private Flash Chip Data 42 * @param base [BOARDSPECIFIC] address to access OneNAND 43 * @dies: [INTERN][FLEXONENAND] number of dies on chip 44 * @boundary: [INTERN][FLEXONENAND] Boundary of the dies 45 * @diesize: [INTERN][FLEXONENAND] Size of the dies 46 * @param chipsize [INTERN] the size of one chip for multichip arrays 47 * @param device_id [INTERN] device ID 48 * @param verstion_id [INTERN] version ID 49 * @technology [INTERN] describes the internal NAND array technology such as SLC or MLC. 50 * @density_mask: [INTERN] chip density, used for DDP devices 51 * @param options [BOARDSPECIFIC] various chip options. They can partly be set to inform onenand_scan about 52 * @param erase_shift [INTERN] number of address bits in a block 53 * @param page_shift [INTERN] number of address bits in a page 54 * @param ppb_shift [INTERN] number of address bits in a pages per block 55 * @param page_mask [INTERN] a page per block mask 56 * @param writesize [INTERN] a real page size 57 * @param bufferam_index [INTERN] BufferRAM index 58 * @param bufferam [INTERN] BufferRAM info 59 * @param readw [REPLACEABLE] hardware specific function for read short 60 * @param writew [REPLACEABLE] hardware specific function for write short 61 * @param command [REPLACEABLE] hardware specific function for writing commands to the chip 62 * @param wait [REPLACEABLE] hardware specific function for wait on ready 63 * @param read_bufferram [REPLACEABLE] hardware specific function for BufferRAM Area 64 * @param write_bufferram [REPLACEABLE] hardware specific function for BufferRAM Area 65 * @param chip_lock [INTERN] spinlock used to protect access to this structure and the chip 66 * @param wq [INTERN] wait queue to sleep on if a OneNAND operation is in progress 67 * @param state [INTERN] the current state of the OneNAND device 68 * @param autooob [REPLACEABLE] the default (auto)placement scheme 69 * @param priv [OPTIONAL] pointer to private chip date 70 */ 71 struct onenand_chip { 72 void __iomem *base; 73 unsigned int dies; 74 unsigned int boundary[MAX_DIES]; 75 unsigned int diesize[MAX_DIES]; 76 unsigned int chipsize; 77 unsigned int device_id; 78 unsigned int version_id; 79 unsigned int technology; 80 unsigned int density_mask; 81 unsigned int options; 82 83 unsigned int erase_shift; 84 unsigned int page_shift; 85 unsigned int ppb_shift; /* Pages per block shift */ 86 unsigned int page_mask; 87 unsigned int writesize; 88 89 unsigned int bufferram_index; 90 struct onenand_bufferram bufferram[MAX_BUFFERRAM]; 91 92 int (*command) (struct mtd_info *mtd, int cmd, loff_t address, 93 size_t len); 94 int (*wait) (struct mtd_info *mtd, int state); 95 int (*bbt_wait) (struct mtd_info *mtd, int state); 96 void (*unlock_all)(struct mtd_info *mtd); 97 int (*read_bufferram) (struct mtd_info *mtd, loff_t addr, int area, 98 unsigned char *buffer, int offset, size_t count); 99 int (*write_bufferram) (struct mtd_info *mtd, loff_t addr, int area, 100 const unsigned char *buffer, int offset, 101 size_t count); 102 unsigned short (*read_word) (void __iomem *addr); 103 void (*write_word) (unsigned short value, void __iomem *addr); 104 void (*mmcontrol) (struct mtd_info *mtd, int sync_read); 105 int (*block_markbad)(struct mtd_info *mtd, loff_t ofs); 106 int (*scan_bbt)(struct mtd_info *mtd); 107 108 unsigned char *main_buf; 109 unsigned char *spare_buf; 110 #ifdef DONT_USE_UBOOT 111 spinlock_t chip_lock; 112 wait_queue_head_t wq; 113 #endif 114 int state; 115 unsigned char *page_buf; 116 unsigned char *oob_buf; 117 118 struct nand_oobinfo *autooob; 119 int subpagesize; 120 struct nand_ecclayout *ecclayout; 121 122 void *bbm; 123 124 void *priv; 125 }; 126 127 /* 128 * Helper macros 129 */ 130 #define ONENAND_CURRENT_BUFFERRAM(this) (this->bufferram_index) 131 #define ONENAND_NEXT_BUFFERRAM(this) (this->bufferram_index ^ 1) 132 #define ONENAND_SET_NEXT_BUFFERRAM(this) (this->bufferram_index ^= 1) 133 #define ONENAND_SET_PREV_BUFFERRAM(this) (this->bufferram_index ^= 1) 134 #define ONENAND_SET_BUFFERRAM0(this) (this->bufferram_index = 0) 135 #define ONENAND_SET_BUFFERRAM1(this) (this->bufferram_index = 1) 136 137 #define FLEXONENAND(this) (this->device_id & DEVICE_IS_FLEXONENAND) 138 #define ONENAND_IS_MLC(this) (this->technology & ONENAND_TECHNOLOGY_IS_MLC) 139 #define ONENAND_IS_DDP(this) \ 140 (this->device_id & ONENAND_DEVICE_IS_DDP) 141 142 #define ONENAND_IS_2PLANE(this) (0) 143 144 /* 145 * Options bits 146 */ 147 #define ONENAND_HAS_CONT_LOCK (0x0001) 148 #define ONENAND_HAS_UNLOCK_ALL (0x0002) 149 #define ONENAND_HAS_2PLANE (0x0004) 150 #define ONENAND_RUNTIME_BADBLOCK_CHECK (0x0200) 151 #define ONENAND_PAGEBUF_ALLOC (0x1000) 152 #define ONENAND_OOBBUF_ALLOC (0x2000) 153 154 /* 155 * OneNAND Flash Manufacturer ID Codes 156 */ 157 #define ONENAND_MFR_SAMSUNG 0xec 158 159 /** 160 * struct nand_manufacturers - NAND Flash Manufacturer ID Structure 161 * @param name: Manufacturer name 162 * @param id: manufacturer ID code of device. 163 */ 164 struct onenand_manufacturers { 165 int id; 166 char *name; 167 }; 168 169 int onenand_bbt_read_oob(struct mtd_info *mtd, loff_t from, 170 struct mtd_oob_ops *ops); 171 172 unsigned int onenand_block(struct onenand_chip *this, loff_t addr); 173 int flexonenand_region(struct mtd_info *mtd, loff_t addr); 174 #endif /* __LINUX_MTD_ONENAND_H */ 175