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spi_sdcard.cpp: Preliminary support for CMD10 (SEND_CID), report CRC16 for data blocks read. [R. Belmont]

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This commit is contained in:
arbee 2021-10-03 20:49:59 -04:00
parent d9f1bb5cd3
commit a27da21b68
1 changed files with 36 additions and 0 deletions
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36
src/devices/machine/spi_sdcard.cpp
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@ -225,6 +225,37 @@ void spi_sdcard_device::do_command()
send_data(5);
break;
case 10: // CMD10 - SEND_CID
m_data[0] = 0x01; // initial R1 response
m_data[1] = 0x00; // throwaway byte before data transfer
m_data[2] = 0xfe; // data token
m_data[3] = 'M'; // Manufacturer ID - we'll use M for MAME
m_data[4] = 'M'; // OEM ID - MD for MAMEdev
m_data[5] = 'D';
m_data[6] = 'M'; // Product Name - "MCARD"
m_data[7] = 'C';
m_data[8] = 'A';
m_data[9] = 'R';
m_data[10] = 'D';
m_data[11] = 0x10; // Product Revision in BCD (1.0)
{
u32 uSerial = machine().rand();
m_data[12] = (uSerial>>24) & 0xff; // PSN - Product Serial Number
m_data[13] = (uSerial>>16) & 0xff;
m_data[14] = (uSerial>>8) & 0xff;
m_data[15] = (uSerial & 0xff);
}
m_data[16] = 0x01; // MDT - Manufacturing Date
m_data[17] = 0x59; // 0x15 9 = 2021, September
m_data[18] = 0x00; // CRC7, bit 0 is always 0
{
util::crc16_t crc16 = util::crc16_creator::simple(&m_data[3], 16);
m_data[19] = (crc16 >> 8) & 0xff;
m_data[20] = (crc16 & 0xff);
}
send_data(3 + 16 + 2);
break;
case 16: // CMD16 - SET_BLOCKLEN
m_blksize = (m_cmd[3] << 8) | m_cmd[4];
if (hard_disk_set_block_size(m_harddisk, m_blksize))
@ -255,6 +286,11 @@ void spi_sdcard_device::do_command()
}
LOGMASKED(LOG_GENERAL, "reading LBA %x\n", blk);
hard_disk_read(m_harddisk, blk, &m_data[3]);
{
util::crc16_t crc16 = util::crc16_creator::simple(&m_data[3], m_blksize);
m_data[m_blksize + 3] = (crc16 >> 8) & 0xff;
m_data[m_blksize + 4] = (crc16 & 0xff);
}
send_data(3 + m_blksize + 2);
}
else