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pulled in capacity issue changes

pull/7774/head
Deepika 2017-06-21 15:04:49 -05:00
parent 99f3d25f44 f462bb6b5a
commit ae280d99e1
1 changed files with 16 additions and 17 deletions
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33
features/filesystem/sd/SDBlockDevice.cpp
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@ -696,30 +696,29 @@ uint32_t SDBlockDevice::_sd_sectors() {
}
// csd_structure : csd[127:126]
// c_size : csd[73:62]
// c_size_mult : csd[49:47]
// read_bl_len : csd[83:80] - the *maximum* read block length
int csd_structure = ext_bits(csd, 127, 126);
switch (csd_structure) {
case 0:
c_size = ext_bits(csd, 73, 62);
c_size_mult = ext_bits(csd, 49, 47);
read_bl_len = ext_bits(csd, 83, 80);
block_len = 1 << read_bl_len;
mult = 1 << (c_size_mult + 2);
blocknr = (c_size + 1) * mult;
capacity = blocknr * block_len;
c_size = ext_bits(csd, 73, 62); // c_size : csd[73:62]
c_size_mult = ext_bits(csd, 49, 47); // c_size_mult : csd[49:47]
read_bl_len = ext_bits(csd, 83, 80); // read_bl_len : csd[83:80] - the *maximum* read block length
block_len = 1 << read_bl_len; // BLOCK_LEN = 2^READ_BL_LEN
mult = 1 << (c_size_mult + 2); // MULT = 2^C_SIZE_MULT+2 (C_SIZE_MULT < 8)
blocknr = (c_size + 1) * mult; // BLOCKNR = (C_SIZE+1) * MULT
capacity = blocknr * block_len; // memory capacity = BLOCKNR * BLOCK_LEN
blocks = capacity / _block_size;
debug_if(_dbg, "\n\rSDBlockDevice\n\rc_size: %d \n\rcapacity: %ld \n\rsectors: %lld\n\r", c_size, capacity, blocks);
debug_if(_dbg, "Standard Capacity: c_size: %d \n\r", c_size);
debug_if(_dbg, "Sectors: 0x%x : %ld\n\r", blocks, blocks);
debug_if(_dbg, "Capacity: 0x%x : %lld MB\n\r", capacity, (capacity/(1024U*1024U)));
break;
case 1:
hc_c_size = ext_bits(csd, 63, 48);
blocks = (hc_c_size+1)*1024;
debug_if(_dbg, "\n\rSDHC Card \n\rhc_c_size: %d\n\rcapacity: %lld \n\rsectors: %lld\n\r", hc_c_size, blocks*512, blocks);
hc_c_size = ext_bits(csd, 69, 48); // device size : C_SIZE : [69:48]
blocks = (hc_c_size+1) << 10; // block count = C_SIZE+1) * 1K byte (512B is block size)
capacity = blocks << 9; // memory capacity = (C_SIZE+1) * 512K byte
debug_if(_dbg, "SDHC/SDXC Card: hc_c_size: %d \n\r", hc_c_size);
debug_if(_dbg, "Sectors: 0x%x : %ld\n\r", blocks, blocks);
debug_if(_dbg, "Capacity: 0x%x : %ld MB\n\r", capacity, (capacity/(1024U*1024U)));
break;
default: