1 2 /* Linux driver for Disk-On-Chip 2000 */ 3 /* (c) 1999 Machine Vision Holdings, Inc. */ 4 /* Author: David Woodhouse <dwmw2@mvhi.com> */ 5 /* $Id: doc2000.h,v 1.15 2001/09/19 00:22:15 dwmw2 Exp $ */ 6 7 #ifndef __MTD_DOC2000_H__ 8 #define __MTD_DOC2000_H__ 9 10 #include <linux/mtd/mtd.h> 11 12 #define DoC_Sig1 0 13 #define DoC_Sig2 1 14 15 #define DoC_ChipID 0x1000 16 #define DoC_DOCStatus 0x1001 17 #define DoC_DOCControl 0x1002 18 #define DoC_FloorSelect 0x1003 19 #define DoC_CDSNControl 0x1004 20 #define DoC_CDSNDeviceSelect 0x1005 21 #define DoC_ECCConf 0x1006 22 #define DoC_2k_ECCStatus 0x1007 23 24 #define DoC_CDSNSlowIO 0x100d 25 #define DoC_ECCSyndrome0 0x1010 26 #define DoC_ECCSyndrome1 0x1011 27 #define DoC_ECCSyndrome2 0x1012 28 #define DoC_ECCSyndrome3 0x1013 29 #define DoC_ECCSyndrome4 0x1014 30 #define DoC_ECCSyndrome5 0x1015 31 #define DoC_AliasResolution 0x101b 32 #define DoC_ConfigInput 0x101c 33 #define DoC_ReadPipeInit 0x101d 34 #define DoC_WritePipeTerm 0x101e 35 #define DoC_LastDataRead 0x101f 36 #define DoC_NOP 0x1020 37 38 #define DoC_Mil_CDSN_IO 0x0800 39 #define DoC_2k_CDSN_IO 0x1800 40 41 /* How to access the device? 42 * On ARM, it'll be mmap'd directly with 32-bit wide accesses. 43 * On PPC, it's mmap'd and 16-bit wide. 44 * Others use readb/writeb 45 */ 46 #if defined(__arm__) 47 #define ReadDOC_(adr, reg) ((unsigned char)(*(__u32 *)(((unsigned long)adr)+((reg)<<2)))) 48 #define WriteDOC_(d, adr, reg) do{ *(__u32 *)(((unsigned long)adr)+((reg)<<2)) = (__u32)d; wmb();} while(0) 49 #define DOC_IOREMAP_LEN 0x8000 50 #elif defined(__ppc__) 51 #define ReadDOC_(adr, reg) ((unsigned char)(*(__u16 *)(((unsigned long)adr)+((reg)<<1)))) 52 #define WriteDOC_(d, adr, reg) do{ *(__u16 *)(((unsigned long)adr)+((reg)<<1)) = (__u16)d; wmb();} while(0) 53 #define DOC_IOREMAP_LEN 0x4000 54 #else 55 #define ReadDOC_(adr, reg) readb(((unsigned long)adr) + (reg)) 56 #define WriteDOC_(d, adr, reg) writeb(d, ((unsigned long)adr) + (reg)) 57 #define DOC_IOREMAP_LEN 0x2000 58 59 #endif 60 61 #if defined(__i386__) || defined(__x86_64__) 62 #define USE_MEMCPY 63 #endif 64 65 /* These are provided to directly use the DoC_xxx defines */ 66 #define ReadDOC(adr, reg) ReadDOC_(adr,DoC_##reg) 67 #define WriteDOC(d, adr, reg) WriteDOC_(d,adr,DoC_##reg) 68 69 #define DOC_MODE_RESET 0 70 #define DOC_MODE_NORMAL 1 71 #define DOC_MODE_RESERVED1 2 72 #define DOC_MODE_RESERVED2 3 73 74 #define DOC_MODE_MDWREN 4 75 #define DOC_MODE_CLR_ERR 0x80 76 77 #define DOC_ChipID_Doc2k 0x20 78 #define DOC_ChipID_DocMil 0x30 79 80 #define CDSN_CTRL_FR_B 0x80 81 #define CDSN_CTRL_ECC_IO 0x20 82 #define CDSN_CTRL_FLASH_IO 0x10 83 #define CDSN_CTRL_WP 0x08 84 #define CDSN_CTRL_ALE 0x04 85 #define CDSN_CTRL_CLE 0x02 86 #define CDSN_CTRL_CE 0x01 87 88 #define DOC_ECC_RESET 0 89 #define DOC_ECC_ERROR 0x80 90 #define DOC_ECC_RW 0x20 91 #define DOC_ECC__EN 0x08 92 #define DOC_TOGGLE_BIT 0x04 93 #define DOC_ECC_RESV 0x02 94 #define DOC_ECC_IGNORE 0x01 95 96 /* We have to also set the reserved bit 1 for enable */ 97 #define DOC_ECC_EN (DOC_ECC__EN | DOC_ECC_RESV) 98 #define DOC_ECC_DIS (DOC_ECC_RESV) 99 100 struct Nand { 101 char floor, chip; 102 unsigned long curadr; 103 unsigned char curmode; 104 /* Also some erase/write/pipeline info when we get that far */ 105 }; 106 107 #define MAX_FLOORS 4 108 #define MAX_CHIPS 4 109 110 #define MAX_FLOORS_MIL 4 111 #define MAX_CHIPS_MIL 1 112 113 #define ADDR_COLUMN 1 114 #define ADDR_PAGE 2 115 #define ADDR_COLUMN_PAGE 3 116 117 struct DiskOnChip { 118 unsigned long physadr; 119 unsigned long virtadr; 120 unsigned long totlen; 121 char ChipID; /* Type of DiskOnChip */ 122 int ioreg; 123 124 unsigned long mfr; /* Flash IDs - only one type of flash per device */ 125 unsigned long id; 126 int chipshift; 127 char page256; 128 char pageadrlen; 129 unsigned long erasesize; 130 131 int curfloor; 132 int curchip; 133 134 int numchips; 135 struct Nand *chips; 136 struct mtd_info *nextdoc; 137 struct semaphore lock; 138 }; 139 140 int doc_decode_ecc(unsigned char sector[512], unsigned char ecc1[6]); 141 142 #endif /* __MTD_DOC2000_H__ */ 143