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Hardcode data for CMD9 and CMD10

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The CRC part still unnerves me
This commit is contained in:
Pokechu22 2020-08-22 23:30:22 -07:00
parent b29c8a1c2a
commit 9d145decf8
1 changed files with 120 additions and 6 deletions
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126
Source/Core/Core/HW/EXI/EXI_DeviceSD.cpp
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@ -137,17 +137,131 @@ void CEXISD::WriteByte(u8 byte)
response.push_back(supply_voltage); // Reserved + voltage
response.push_back(check_pattern);
}
else if (cmd[0] == 0x49 || cmd[0] == 0x4A) // SEND_CSD or SEND_CID
else if (cmd[0] == 0x49) // SEND_CSD
{
u64 size = 0x8000000; // TODO
// 2048 bytes/sector
// We could make this dynamic to support a wider range of file sizes
constexpr u32 read_bl_len = 11;
// size = (c_size + 1) * (1 << (2 + c_size_mult + read_bl_len))
u32 c_size_mult = 0;
bool invalid_size = false;
while (size > 4096)
{
invalid_size |= size & 1;
size >>= 1;
if (++c_size_mult >= 8 + 2 + read_bl_len)
{
ERROR_LOG_FMT(IOS_SD, "SD Card is too big!");
// Set max values
size = 4096;
c_size_mult = 7 + 2 + read_bl_len;
}
}
c_size_mult -= 2 + read_bl_len;
--size;
const u32 c_size(size);
if (invalid_size)
WARN_LOG_FMT(IOS_SD, "SD Card size is invalid");
else
INFO_LOG_FMT(IOS_SD, "SD C_SIZE = {}, C_SIZE_MULT = {}", c_size, c_size_mult);
// R1
response.push_back(0);
// Data ready token
response.push_back(0xfe);
// CSD
// 0b00 CSD_STRUCTURE (SDv1)
// 0b000000 reserved
// 0b01111111 TAAC (8.0 * 10ms)
// 0b00000000 NSAC
// 0b00110010 TRAN_SPEED (2.5 * 10 Mbit/s, max operating frequency)
// 0b010110110101 CCC
// 0b1111 READ_BL_LEN (2048 bytes)
// 0b1 READ_BL_PARTIAL
// 0b0 WRITE_BL_MISALIGN
// 0b0 READ_BLK_MISALIGN
// 0b0 DSR_IMP (no driver stage register implemented)
// 0b00 reserved
// 0b?????????? C_SIZE (most significant 10 bits)
// 0b?? C_SIZE (least significant 2 bits)
// 0b111 VDD_R_CURR_MIN (100 mA)
// 0b111 VDD_R_CURR_MAX (100 mA)
// 0b111 VDD_W_CURR_MIN (100 mA)
// 0b111 VDD_W_CURR_MAX (100 mA)
// 0b??? C_SIZE_MULT
// 0b1 ERASE_BLK_EN (erase unit = 512 bytes)
// 0b1111111 SECTOR_SIZE (128 write blocks)
// 0b0000000 WP_GRP_SIZE
// 0b0 WP_GRP_ENABLE (no write protection)
// 0b00 reserved
// 0b001 R2W_FACTOR (write half as fast as read)
// 0b1111 WRITE_BL_LEN (= READ_BL_LEN)
// 0b0 WRITE_BL_PARTIAL (no partial block writes)
// 0b00000 reserved
// 0b0 FILE_FORMAT_GRP (default)
// 0b1 COPY (contents are copied)
// 0b0 PERM_WRITE_PROTECT (not permanently write protected)
// 0b0 TMP_READ_PROTECT (not temporarily write protected)
// 0b00 FILE_FORMAT (contains partition table)
// 0b00 reserved
// 0b??????? CRC
// 0b1 reserved
// TODO: CRC7 (but so far it looks like nobody is actually verifying this)
constexpr u32 crc = 0;
// Form the csd using the description above
response.push_back(0x00);
response.push_back(0x07);
response.push_back(0xf0);
response.push_back(0x03);
response.push_back(0x5b);
response.push_back(0x5f);
response.push_back(0x80 | (c_size >> 10));
response.push_back(c_size >> 2);
response.push_back(0x3f | c_size << 6);
response.push_back(0xfc | (c_size_mult >> 1));
response.push_back(0x7f | (c_size << 7));
response.push_back(0x80);
response.push_back(0x07);
response.push_back(0xc0);
response.push_back(0x40);
response.push_back(0x01 | (crc << 1));
// Surprisingly, this thing's CRC16 is 0. Probably shouldn't be hardcoded still.
response.push_back(0);
response.push_back(0);
}
else if (cmd[0] == 0x4A) // SEND_CID
{
// R1
response.push_back(0);
// Data ready token
response.push_back(0xfe);
// CSD or CID - 16 bytes, including a CRC7 in the last byte and a reserved LSB
// However, nothing seems to check the CRC7 currently
for (size_t i = 0; i < 16; i++)
response.push_back(0);
// CRC16 of all 0 is 0, but we'll want to implement it properly later
// The CID -- no idea what the format is, copied from SDIOSlot0
response.push_back(0x80);
response.push_back(0x11);
response.push_back(0x4d);
response.push_back(0x1c);
response.push_back(0x80);
response.push_back(0x08);
response.push_back(0x00);
response.push_back(0x00);
response.push_back(0x80);
response.push_back(0x07);
response.push_back(0xb5);
response.push_back(0x20);
response.push_back(0x80);
response.push_back(0x08);
response.push_back(0x00);
response.push_back(0x00);
// Very dubiously, this thing's CRC16 is ALSO 0. At least per libogc...
response.push_back(0);
response.push_back(0);
}