EccNandFlash_ReadPage
Default mainpageat91libmemoriesnandflashEccNandFlash_ReadPage
Description Source Call Graph
Start Line: 101
unsigned char EccNandFlash_ReadPage(const struct EccNandFlash *ecc, unsigned short block, unsigned short page, void *data, void *spare)
{
    unsigned char tmpData[NandCommon_MAXPAGEDATASIZE];
    unsigned char tmpSpare[NandCommon_MAXPAGESPARESIZE];
    unsigned char error;
    unsigned char hamming[NandCommon_MAXSPAREECCBYTES];
    unsigned short pageDataSize = NandFlashModel_GetPageDataSize(MODEL(ecc));
    unsigned char pageSpareSize = NandFlashModel_GetPageSpareSize(MODEL(ecc));

    TRACE_DEBUG("EccNandFlash_ReadPage(B#%d:P#%d)\n\r", block, page);

    // Start by reading the spare and the data
    error = RawNandFlash_ReadPage(RAW(ecc), block, page, tmpData, tmpSpare);
    if (error) {

        TRACE_ERROR("EccNandFlash_ReadPage: Failed to read page\n\r");
        return error;
    }

    // Retrieve ECC information from page and verify the data
    NandSpareScheme_ReadEcc(NandFlashModel_GetScheme(MODEL(ecc)), tmpSpare, hamming);
    error = Hamming_Verify256x(tmpData, pageDataSize, hamming);
    if (error && (error != Hamming_ERROR_SINGLEBIT)) {

        TRACE_ERROR("EccNandFlash_ReadPage: Unrecoverable data\n\r");
        return NandCommon_ERROR_CORRUPTEDDATA;
    }

    // Copy data and/or spare into final buffers
    if (data) {

        memcpy(data, tmpData, pageDataSize);
    }
    if (spare) {

        memcpy(spare, tmpSpare, pageSpareSize);
    }

    return 0;
}