1 /* 2 * Linux driver for Disk-On-Chip devices 3 * 4 * Copyright © 1999 Machine Vision Holdings, Inc. 5 * Copyright © 1999-2010 David Woodhouse <dwmw2@infradead.org> 6 * Copyright © 2002-2003 Greg Ungerer <gerg@snapgear.com> 7 * Copyright © 2002-2003 SnapGear Inc 8 * 9 * This program is free software; you can redistribute it and/or modify 10 * it under the terms of the GNU General Public License as published by 11 * the Free Software Foundation; either version 2 of the License, or 12 * (at your option) any later version. 13 * 14 * This program is distributed in the hope that it will be useful, 15 * but WITHOUT ANY WARRANTY; without even the implied warranty of 16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 17 * GNU General Public License for more details. 18 * 19 * You should have received a copy of the GNU General Public License 20 * along with this program; if not, write to the Free Software 21 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA 22 * 23 */ 24 25 #ifndef __MTD_DOC2000_H__ 26 #define __MTD_DOC2000_H__ 27 28 #include <linux/mtd/mtd.h> 29 #include <linux/mutex.h> 30 31 #define DoC_Sig1 0 32 #define DoC_Sig2 1 33 34 #define DoC_ChipID 0x1000 35 #define DoC_DOCStatus 0x1001 36 #define DoC_DOCControl 0x1002 37 #define DoC_FloorSelect 0x1003 38 #define DoC_CDSNControl 0x1004 39 #define DoC_CDSNDeviceSelect 0x1005 40 #define DoC_ECCConf 0x1006 41 #define DoC_2k_ECCStatus 0x1007 42 43 #define DoC_CDSNSlowIO 0x100d 44 #define DoC_ECCSyndrome0 0x1010 45 #define DoC_ECCSyndrome1 0x1011 46 #define DoC_ECCSyndrome2 0x1012 47 #define DoC_ECCSyndrome3 0x1013 48 #define DoC_ECCSyndrome4 0x1014 49 #define DoC_ECCSyndrome5 0x1015 50 #define DoC_AliasResolution 0x101b 51 #define DoC_ConfigInput 0x101c 52 #define DoC_ReadPipeInit 0x101d 53 #define DoC_WritePipeTerm 0x101e 54 #define DoC_LastDataRead 0x101f 55 #define DoC_NOP 0x1020 56 57 #define DoC_Mil_CDSN_IO 0x0800 58 #define DoC_2k_CDSN_IO 0x1800 59 60 #define DoC_Mplus_NOP 0x1002 61 #define DoC_Mplus_AliasResolution 0x1004 62 #define DoC_Mplus_DOCControl 0x1006 63 #define DoC_Mplus_AccessStatus 0x1008 64 #define DoC_Mplus_DeviceSelect 0x1008 65 #define DoC_Mplus_Configuration 0x100a 66 #define DoC_Mplus_OutputControl 0x100c 67 #define DoC_Mplus_FlashControl 0x1020 68 #define DoC_Mplus_FlashSelect 0x1022 69 #define DoC_Mplus_FlashCmd 0x1024 70 #define DoC_Mplus_FlashAddress 0x1026 71 #define DoC_Mplus_FlashData0 0x1028 72 #define DoC_Mplus_FlashData1 0x1029 73 #define DoC_Mplus_ReadPipeInit 0x102a 74 #define DoC_Mplus_LastDataRead 0x102c 75 #define DoC_Mplus_LastDataRead1 0x102d 76 #define DoC_Mplus_WritePipeTerm 0x102e 77 #define DoC_Mplus_ECCSyndrome0 0x1040 78 #define DoC_Mplus_ECCSyndrome1 0x1041 79 #define DoC_Mplus_ECCSyndrome2 0x1042 80 #define DoC_Mplus_ECCSyndrome3 0x1043 81 #define DoC_Mplus_ECCSyndrome4 0x1044 82 #define DoC_Mplus_ECCSyndrome5 0x1045 83 #define DoC_Mplus_ECCConf 0x1046 84 #define DoC_Mplus_Toggle 0x1046 85 #define DoC_Mplus_DownloadStatus 0x1074 86 #define DoC_Mplus_CtrlConfirm 0x1076 87 #define DoC_Mplus_Power 0x1fff 88 89 /* How to access the device? 90 * On ARM, it'll be mmap'd directly with 32-bit wide accesses. 91 * On PPC, it's mmap'd and 16-bit wide. 92 * Others use readb/writeb 93 */ 94 #if defined(__arm__) 95 #define ReadDOC_(adr, reg) ((unsigned char)(*(volatile __u32 *)(((unsigned long)adr)+((reg)<<2)))) 96 #define WriteDOC_(d, adr, reg) do{ *(volatile __u32 *)(((unsigned long)adr)+((reg)<<2)) = (__u32)d; wmb();} while(0) 97 #define DOC_IOREMAP_LEN 0x8000 98 #elif defined(__ppc__) 99 #define ReadDOC_(adr, reg) ((unsigned char)(*(volatile __u16 *)(((unsigned long)adr)+((reg)<<1)))) 100 #define WriteDOC_(d, adr, reg) do{ *(volatile __u16 *)(((unsigned long)adr)+((reg)<<1)) = (__u16)d; wmb();} while(0) 101 #define DOC_IOREMAP_LEN 0x4000 102 #else 103 #define ReadDOC_(adr, reg) readb((void __iomem *)(adr) + (reg)) 104 #define WriteDOC_(d, adr, reg) writeb(d, (void __iomem *)(adr) + (reg)) 105 #define DOC_IOREMAP_LEN 0x2000 106 107 #endif 108 109 #if defined(__i386__) || defined(__x86_64__) 110 #define USE_MEMCPY 111 #endif 112 113 /* These are provided to directly use the DoC_xxx defines */ 114 #define ReadDOC(adr, reg) ReadDOC_(adr,DoC_##reg) 115 #define WriteDOC(d, adr, reg) WriteDOC_(d,adr,DoC_##reg) 116 117 #define DOC_MODE_RESET 0 118 #define DOC_MODE_NORMAL 1 119 #define DOC_MODE_RESERVED1 2 120 #define DOC_MODE_RESERVED2 3 121 122 #define DOC_MODE_CLR_ERR 0x80 123 #define DOC_MODE_RST_LAT 0x10 124 #define DOC_MODE_BDECT 0x08 125 #define DOC_MODE_MDWREN 0x04 126 127 #define DOC_ChipID_Doc2k 0x20 128 #define DOC_ChipID_Doc2kTSOP 0x21 /* internal number for MTD */ 129 #define DOC_ChipID_DocMil 0x30 130 #define DOC_ChipID_DocMilPlus32 0x40 131 #define DOC_ChipID_DocMilPlus16 0x41 132 133 #define CDSN_CTRL_FR_B 0x80 134 #define CDSN_CTRL_FR_B0 0x40 135 #define CDSN_CTRL_FR_B1 0x80 136 137 #define CDSN_CTRL_ECC_IO 0x20 138 #define CDSN_CTRL_FLASH_IO 0x10 139 #define CDSN_CTRL_WP 0x08 140 #define CDSN_CTRL_ALE 0x04 141 #define CDSN_CTRL_CLE 0x02 142 #define CDSN_CTRL_CE 0x01 143 144 #define DOC_ECC_RESET 0 145 #define DOC_ECC_ERROR 0x80 146 #define DOC_ECC_RW 0x20 147 #define DOC_ECC__EN 0x08 148 #define DOC_TOGGLE_BIT 0x04 149 #define DOC_ECC_RESV 0x02 150 #define DOC_ECC_IGNORE 0x01 151 152 #define DOC_FLASH_CE 0x80 153 #define DOC_FLASH_WP 0x40 154 #define DOC_FLASH_BANK 0x02 155 156 /* We have to also set the reserved bit 1 for enable */ 157 #define DOC_ECC_EN (DOC_ECC__EN | DOC_ECC_RESV) 158 #define DOC_ECC_DIS (DOC_ECC_RESV) 159 160 struct Nand { 161 char floor, chip; 162 unsigned long curadr; 163 unsigned char curmode; 164 /* Also some erase/write/pipeline info when we get that far */ 165 }; 166 167 #define MAX_FLOORS 4 168 #define MAX_CHIPS 4 169 170 #define MAX_FLOORS_MIL 1 171 #define MAX_CHIPS_MIL 1 172 173 #define MAX_FLOORS_MPLUS 2 174 #define MAX_CHIPS_MPLUS 1 175 176 #define ADDR_COLUMN 1 177 #define ADDR_PAGE 2 178 #define ADDR_COLUMN_PAGE 3 179 180 struct DiskOnChip { 181 unsigned long physadr; 182 void __iomem *virtadr; 183 unsigned long totlen; 184 unsigned char ChipID; /* Type of DiskOnChip */ 185 int ioreg; 186 187 unsigned long mfr; /* Flash IDs - only one type of flash per device */ 188 unsigned long id; 189 int chipshift; 190 char page256; 191 char pageadrlen; 192 char interleave; /* Internal interleaving - Millennium Plus style */ 193 unsigned long erasesize; 194 195 int curfloor; 196 int curchip; 197 198 int numchips; 199 struct Nand *chips; 200 struct mtd_info *nextdoc; 201 struct mutex lock; 202 }; 203 204 int doc_decode_ecc(unsigned char sector[512], unsigned char ecc1[6]); 205 206 #endif /* __MTD_DOC2000_H__ */ 207