diff options
Diffstat (limited to 'drivers/staging/keucr/smilecc.c')
| -rw-r--r-- | drivers/staging/keucr/smilecc.c | 201 |
1 files changed, 201 insertions, 0 deletions
diff --git a/drivers/staging/keucr/smilecc.c b/drivers/staging/keucr/smilecc.c new file mode 100644 index 0000000..daf322a --- /dev/null +++ b/drivers/staging/keucr/smilecc.c @@ -0,0 +1,201 @@ +#include "usb.h" +#include "scsiglue.h" +#include "transport.h" +//#include "stdlib.h" +//#include "EUCR6SK.h" +#include "smcommon.h" +#include "smil.h" + +//#include <stdio.h> +//#include <stdlib.h> +//#include <string.h> +//#include <dos.h> +// +//#include "EMCRIOS.h" + +// CP0-CP5 code table +static BYTE ecctable[256] = { +0x00,0x55,0x56,0x03,0x59,0x0C,0x0F,0x5A,0x5A,0x0F,0x0C,0x59,0x03,0x56,0x55,0x00, +0x65,0x30,0x33,0x66,0x3C,0x69,0x6A,0x3F,0x3F,0x6A,0x69,0x3C,0x66,0x33,0x30,0x65, +0x66,0x33,0x30,0x65,0x3F,0x6A,0x69,0x3C,0x3C,0x69,0x6A,0x3F,0x65,0x30,0x33,0x66, +0x03,0x56,0x55,0x00,0x5A,0x0F,0x0C,0x59,0x59,0x0C,0x0F,0x5A,0x00,0x55,0x56,0x03, +0x69,0x3C,0x3F,0x6A,0x30,0x65,0x66,0x33,0x33,0x66,0x65,0x30,0x6A,0x3F,0x3C,0x69, +0x0C,0x59,0x5A,0x0F,0x55,0x00,0x03,0x56,0x56,0x03,0x00,0x55,0x0F,0x5A,0x59,0x0C, +0x0F,0x5A,0x59,0x0C,0x56,0x03,0x00,0x55,0x55,0x00,0x03,0x56,0x0C,0x59,0x5A,0x0F, +0x6A,0x3F,0x3C,0x69,0x33,0x66,0x65,0x30,0x30,0x65,0x66,0x33,0x69,0x3C,0x3F,0x6A, +0x6A,0x3F,0x3C,0x69,0x33,0x66,0x65,0x30,0x30,0x65,0x66,0x33,0x69,0x3C,0x3F,0x6A, +0x0F,0x5A,0x59,0x0C,0x56,0x03,0x00,0x55,0x55,0x00,0x03,0x56,0x0C,0x59,0x5A,0x0F, +0x0C,0x59,0x5A,0x0F,0x55,0x00,0x03,0x56,0x56,0x03,0x00,0x55,0x0F,0x5A,0x59,0x0C, +0x69,0x3C,0x3F,0x6A,0x30,0x65,0x66,0x33,0x33,0x66,0x65,0x30,0x6A,0x3F,0x3C,0x69, +0x03,0x56,0x55,0x00,0x5A,0x0F,0x0C,0x59,0x59,0x0C,0x0F,0x5A,0x00,0x55,0x56,0x03, +0x66,0x33,0x30,0x65,0x3F,0x6A,0x69,0x3C,0x3C,0x69,0x6A,0x3F,0x65,0x30,0x33,0x66, +0x65,0x30,0x33,0x66,0x3C,0x69,0x6A,0x3F,0x3F,0x6A,0x69,0x3C,0x66,0x33,0x30,0x65, +0x00,0x55,0x56,0x03,0x59,0x0C,0x0F,0x5A,0x5A,0x0F,0x0C,0x59,0x03,0x56,0x55,0x00 +}; + +static void trans_result (BYTE, BYTE, BYTE *, BYTE *); + +#define BIT7 0x80 +#define BIT6 0x40 +#define BIT5 0x20 +#define BIT4 0x10 +#define BIT3 0x08 +#define BIT2 0x04 +#define BIT1 0x02 +#define BIT0 0x01 +#define BIT1BIT0 0x03 +#define BIT23 0x00800000L +#define MASK_CPS 0x3f +#define CORRECTABLE 0x00555554L + +static void trans_result(reg2,reg3,ecc1,ecc2) +BYTE reg2; // LP14,LP12,LP10,... +BYTE reg3; // LP15,LP13,LP11,... +BYTE *ecc1; // LP15,LP14,LP13,... +BYTE *ecc2; // LP07,LP06,LP05,... +{ + BYTE a; // Working for reg2,reg3 + BYTE b; // Working for ecc1,ecc2 + BYTE i; // For counting + + a=BIT7; b=BIT7; // 80h=10000000b + *ecc1=*ecc2=0; // Clear ecc1,ecc2 + for(i=0; i<4; ++i) { + if ((reg3&a)!=0) + *ecc1|=b; // LP15,13,11,9 -> ecc1 + b=b>>1; // Right shift + if ((reg2&a)!=0) + *ecc1|=b; // LP14,12,10,8 -> ecc1 + b=b>>1; // Right shift + a=a>>1; // Right shift + } + + b=BIT7; // 80h=10000000b + for(i=0; i<4; ++i) { + if ((reg3&a)!=0) + *ecc2|=b; // LP7,5,3,1 -> ecc2 + b=b>>1; // Right shift + if ((reg2&a)!=0) + *ecc2|=b; // LP6,4,2,0 -> ecc2 + b=b>>1; // Right shift + a=a>>1; // Right shift + } +} + +//static void calculate_ecc(table,data,ecc1,ecc2,ecc3) +void calculate_ecc(table,data,ecc1,ecc2,ecc3) +BYTE *table; // CP0-CP5 code table +BYTE *data; // DATA +BYTE *ecc1; // LP15,LP14,LP13,... +BYTE *ecc2; // LP07,LP06,LP05,... +BYTE *ecc3; // CP5,CP4,CP3,...,"1","1" +{ + DWORD i; // For counting + BYTE a; // Working for table + BYTE reg1; // D-all,CP5,CP4,CP3,... + BYTE reg2; // LP14,LP12,L10,... + BYTE reg3; // LP15,LP13,L11,... + + reg1=reg2=reg3=0; // Clear parameter + for(i=0; i<256; ++i) { + a=table[data[i]]; // Get CP0-CP5 code from table + reg1^=(a&MASK_CPS); // XOR with a + if ((a&BIT6)!=0) + { // If D_all(all bit XOR) = 1 + reg3^=(BYTE)i; // XOR with counter + reg2^=~((BYTE)i); // XOR with inv. of counter + } + } + + // Trans LP14,12,10,... & LP15,13,11,... -> LP15,14,13,... & LP7,6,5,.. + trans_result(reg2,reg3,ecc1,ecc2); + *ecc1=~(*ecc1); *ecc2=~(*ecc2); // Inv. ecc2 & ecc3 + *ecc3=((~reg1)<<2)|BIT1BIT0; // Make TEL format +} + +BYTE correct_data(data,eccdata,ecc1,ecc2,ecc3) +BYTE *data; // DATA +BYTE *eccdata; // ECC DATA +BYTE ecc1; // LP15,LP14,LP13,... +BYTE ecc2; // LP07,LP06,LP05,... +BYTE ecc3; // CP5,CP4,CP3,...,"1","1" +{ + DWORD l; // Working to check d + DWORD d; // Result of comparison + DWORD i; // For counting + BYTE d1,d2,d3; // Result of comparison + BYTE a; // Working for add + BYTE add; // Byte address of cor. DATA + BYTE b; // Working for bit + BYTE bit; // Bit address of cor. DATA + + d1=ecc1^eccdata[1]; d2=ecc2^eccdata[0]; // Compare LP's + d3=ecc3^eccdata[2]; // Comapre CP's + d=((DWORD)d1<<16) // Result of comparison + +((DWORD)d2<<8) + +(DWORD)d3; + + if (d==0) return(0); // If No error, return + + if (((d^(d>>1))&CORRECTABLE)==CORRECTABLE) + { // If correctable + l=BIT23; + add=0; // Clear parameter + a=BIT7; + + for(i=0; i<8; ++i) { // Checking 8 bit + if ((d&l)!=0) add|=a; // Make byte address from LP's + l>>=2; a>>=1; // Right Shift + } + + bit=0; // Clear parameter + b=BIT2; + for(i=0; i<3; ++i) { // Checking 3 bit + if ((d&l)!=0) bit|=b; // Make bit address from CP's + l>>=2; b>>=1; // Right shift + } + + b=BIT0; + data[add]^=(b<<bit); // Put corrected data + return(1); + } + + i=0; // Clear count + d&=0x00ffffffL; // Masking + + while(d) { // If d=0 finish counting + if (d&BIT0) ++i; // Count number of 1 bit + d>>=1; // Right shift + } + + if (i==1) + { // If ECC error + eccdata[1]=ecc1; eccdata[0]=ecc2; // Put right ECC code + eccdata[2]=ecc3; + return(2); + } + return(3); // Uncorrectable error +} + +int _Correct_D_SwECC(buf,redundant_ecc,calculate_ecc) +BYTE *buf; +BYTE *redundant_ecc; +BYTE *calculate_ecc; +{ + DWORD err; + + err=correct_data(buf,redundant_ecc,*(calculate_ecc+1),*(calculate_ecc),*(calculate_ecc+2)); + if (err==1) StringCopy(calculate_ecc,redundant_ecc,3); + if (err==0 || err==1 || err==2) + return(0); + return(-1); +} + +void _Calculate_D_SwECC(buf,ecc) +BYTE *buf; +BYTE *ecc; +{ + calculate_ecc(ecctable,buf,ecc+1,ecc+0,ecc+2); +} + + |
