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|
// license:BSD-3-Clause
// copyright-holders:Raphael Nabet
/*
NAND flash emulation
References:
Datasheets for various SmartMedia chips were found on Samsung and Toshiba's
sites (http://www.toshiba.com/taec and
http://www.samsung.com/Products/Semiconductor/Flash/FlashCard/SmartMedia)
Raphael Nabet 2004
*/
#include "emu.h"
#include "nandflash.h"
#include "formats/imageutl.h"
ALLOW_SAVE_TYPE(nand_device::sm_mode_t)
ALLOW_SAVE_TYPE(nand_device::pointer_sm_mode_t)
DEFINE_DEVICE_TYPE(NAND, nand_device, "nand", "NAND Flash Memory")
DEFINE_DEVICE_TYPE(SAMSUNG_K9F5608U0D, samsung_k9f5608u0d_device, "samsung_k9f5608u0d", "Samsung K9F5608U0D")
DEFINE_DEVICE_TYPE(SAMSUNG_K9F5608U0DJ, samsung_k9f5608u0dj_device, "samsung_k9f5608u0dj", "Samsung K9F5608U0D-J")
DEFINE_DEVICE_TYPE(SAMSUNG_K9F5608U0B, samsung_k9f5608u0b_device, "samsung_k9f5608u0b", "Samsung K9F5608U0B")
DEFINE_DEVICE_TYPE(SAMSUNG_K9F2808U0B, samsung_k9f2808u0b_device, "samsung_k9f2808u0b", "Samsung K9F2808U0B")
DEFINE_DEVICE_TYPE(SAMSUNG_K9F1G08U0B, samsung_k9f1g08u0b_device, "samsung_k9f1g08u0b", "Samsung K9F1G08U0B")
DEFINE_DEVICE_TYPE(SAMSUNG_K9F1G08U0M, samsung_k9f1g08u0m_device, "samsung_k9f1g08u0m", "Samsung K9F1G08U0M")
DEFINE_DEVICE_TYPE(SAMSUNG_K9LAG08U0M, samsung_k9lag08u0m_device, "samsung_k9lag08u0m", "Samsung K9LAG08U0M")
DEFINE_DEVICE_TYPE(SAMSUNG_K9F2G08U0M, samsung_k9f2g08u0m_device, "samsung_k9f2g08u0m", "Samsung K9F2G08U0M")
DEFINE_DEVICE_TYPE(TOSHIBA_TC58256AFT, toshiba_tc58256aft_device, "toshiba_tc58256aft", "Toshiba TC58256AFT")
nand_device::nand_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock)
: nand_device(mconfig, NAND, tag, owner, clock)
{
}
nand_device::nand_device(const machine_config &mconfig, device_type type, const char *tag, device_t *owner, uint32_t clock)
: device_t(mconfig, type, tag, owner, clock),
device_nvram_interface(mconfig, *this),
m_region(*this, DEVICE_SELF),
m_page_data_size(0),
m_page_total_size(0),
m_num_pages(0),
m_log2_pages_per_block(0),
m_pagereg(nullptr),
m_id_len(0),
m_col_address_cycles(0),
m_row_address_cycles(0),
m_sequential_row_read(0),
m_write_rnb(*this)
{
memset(m_id, 0, sizeof(m_id));
}
samsung_k9f5608u0d_device::samsung_k9f5608u0d_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock)
: nand_device(mconfig, SAMSUNG_K9F5608U0D, tag, owner, clock)
{
m_id_len = 2;
m_id[0] = 0xec;
m_id[1] = 0x75;
m_page_data_size = 512;
m_page_total_size = 512 + 16;
m_log2_pages_per_block = compute_log2(32);
m_num_pages = 32 * 2048;
m_col_address_cycles = 1;
m_row_address_cycles = 2;
m_sequential_row_read = 1;
}
samsung_k9f5608u0dj_device::samsung_k9f5608u0dj_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock)
: nand_device(mconfig, SAMSUNG_K9F5608U0DJ, tag, owner, clock)
{
m_id_len = 2;
m_id[0] = 0xec;
m_id[1] = 0x75;
m_page_data_size = 512;
m_page_total_size = 512 + 16;
m_log2_pages_per_block = compute_log2(32);
m_num_pages = 32 * 2048;
m_col_address_cycles = 1;
m_row_address_cycles = 2;
m_sequential_row_read = 0;
}
samsung_k9f5608u0b_device::samsung_k9f5608u0b_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock)
: nand_device(mconfig, SAMSUNG_K9F5608U0B, tag, owner, clock)
{
m_id_len = 2;
m_id[0] = 0xec;
m_id[1] = 0x75;
m_page_data_size = 512;
m_page_total_size = 512 + 16;
m_log2_pages_per_block = compute_log2(32);
m_num_pages = 32 * 2048;
m_col_address_cycles = 1;
m_row_address_cycles = 2;
m_sequential_row_read = 0;
}
samsung_k9f2808u0b_device::samsung_k9f2808u0b_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock)
: nand_device(mconfig, SAMSUNG_K9F2808U0B, tag, owner, clock)
{
m_id_len = 2;
m_id[0] = 0xec;
m_id[1] = 0x73;
m_page_data_size = 512;
m_page_total_size = 512 + 16;
m_log2_pages_per_block = compute_log2(32);
m_num_pages = 32 * 1024;
m_col_address_cycles = 1;
m_row_address_cycles = 2;
m_sequential_row_read = 0;
}
samsung_k9f1g08u0b_device::samsung_k9f1g08u0b_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock)
: nand_device(mconfig, SAMSUNG_K9F1G08U0B, tag, owner, clock)
{
m_id_len = 5;
m_id[0] = 0xec;
m_id[1] = 0xf1;
m_id[2] = 0x00;
m_id[3] = 0x95;
m_id[4] = 0x40;
m_page_data_size = 2048;
m_page_total_size = 2048 + 64;
m_log2_pages_per_block = compute_log2(64);
m_num_pages = 64 * 1024;
m_col_address_cycles = 2;
m_row_address_cycles = 2;
m_sequential_row_read = 0;
}
samsung_k9f1g08u0m_device::samsung_k9f1g08u0m_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock)
: nand_device(mconfig, SAMSUNG_K9F1G08U0M, tag, owner, clock)
{
m_id_len = 4;
m_id[0] = 0xec;
m_id[1] = 0xf1;
m_id[2] = 0x00;
m_id[3] = 0x15;
m_page_data_size = 2048;
m_page_total_size = 2048 + 64;
m_log2_pages_per_block = compute_log2(64);
m_num_pages = 64 * 1024;
m_col_address_cycles = 2;
m_row_address_cycles = 2;
m_sequential_row_read = 0;
}
samsung_k9lag08u0m_device::samsung_k9lag08u0m_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock)
: nand_device(mconfig, SAMSUNG_K9LAG08U0M, tag, owner, clock)
{
m_id_len = 5;
m_id[0] = 0xec;
m_id[1] = 0xd5;
m_id[2] = 0x55;
m_id[3] = 0x25;
m_id[4] = 0x68;
m_page_data_size = 2048;
m_page_total_size = 2048 + 64;
m_log2_pages_per_block = compute_log2(128);
m_num_pages = 128 * 8192;
m_col_address_cycles = 2;
m_row_address_cycles = 3;
m_sequential_row_read = 0;
}
samsung_k9f2g08u0m_device::samsung_k9f2g08u0m_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock)
: nand_device(mconfig, SAMSUNG_K9F2G08U0M, tag, owner, clock)
{
m_id_len = 4;
m_id[0] = 0xec;
m_id[1] = 0xda;
m_id[2] = 0x00;
m_id[3] = 0x15;
m_page_data_size = 2048;
m_page_total_size = 2048 + 64;
m_log2_pages_per_block = compute_log2(64);
m_num_pages = 128 * 1024;
m_col_address_cycles = 2;
m_row_address_cycles = 3;
m_sequential_row_read = 0;
}
toshiba_tc58256aft_device::toshiba_tc58256aft_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock)
: nand_device(mconfig, TOSHIBA_TC58256AFT, tag, owner, clock)
{
m_id_len = 2;
m_id[0] = 0x98;
m_id[1] = 0x75;
m_page_data_size = 512;
m_page_total_size = 512 + 16;
m_log2_pages_per_block = compute_log2(32);
m_num_pages = 32 * 2048;
m_col_address_cycles = 1;
m_row_address_cycles = 2;
m_sequential_row_read = 0;
}
void nand_device::device_start()
{
m_data_uid_ptr = nullptr; // smartmed cruft
m_feeprom_data = std::make_unique<uint8_t[]>(m_page_total_size * m_num_pages);
m_pagereg = std::make_unique<uint8_t[]>(m_page_total_size);
save_item(NAME(m_mode));
save_item(NAME(m_pointer_mode));
save_item(NAME(m_page_addr));
save_item(NAME(m_byte_addr));
save_item(NAME(m_status));
save_item(NAME(m_accumulated_status));
save_item(NAME(m_mode_3065));
}
void nand_device::device_reset()
{
m_mode = SM_M_INIT;
m_pointer_mode = SM_PM_A;
m_page_addr = 0;
m_byte_addr = 0;
m_accumulated_status = 0;
m_mode_3065 = false;
m_status = 0xc0;
std::fill_n(m_pagereg.get(), m_page_total_size, 0);
}
void nand_device::nvram_default()
{
if (m_region.found())
{
// Copy from region if it exists
uint32_t bytes = m_region->bytes();
if (bytes > m_page_total_size * m_num_pages)
bytes = m_page_total_size * m_num_pages;
for (offs_t offs = 0; offs < bytes; offs++)
m_feeprom_data[offs] = m_region->as_u8(offs);
return;
}
memset(&m_feeprom_data[0], 0xff, m_page_total_size * m_num_pages);
}
bool nand_device::nvram_read(util::read_stream &file)
{
uint32_t const size = m_page_total_size * m_num_pages;
auto const [err, actual] = read(file, &m_feeprom_data[0], size);
return !err && (actual == size);
}
bool nand_device::nvram_write(util::write_stream &file)
{
uint32_t const size = m_page_total_size * m_num_pages;
auto const [err, actual] = write(file, &m_feeprom_data[0], size);
return !err;
}
int nand_device::is_present()
{
return m_num_pages != 0;
}
int nand_device::is_protected()
{
return (m_status & 0x80) == 0;
}
int nand_device::is_busy()
{
return (m_status & 0x40) == 0;
}
void nand_device::command_w(uint8_t data)
{
if (!is_present())
return;
switch (data)
{
case 0xff: // Reset
m_mode = SM_M_INIT;
m_pointer_mode = SM_PM_A;
m_status = (m_status & 0x80) | 0x40;
m_accumulated_status = 0;
m_mode_3065 = false;
m_write_rnb(0);
m_write_rnb(1);
break;
case 0x00: // Read (1st cycle)
m_mode = SM_M_READ;
m_pointer_mode = SM_PM_A;
m_addr_load_ptr = 0;
break;
case 0x01:
if (m_page_data_size != 512)
{
logerror("nandflash: unsupported upper data field select (256-byte pages)\n");
m_mode = SM_M_INIT;
}
else
{
m_mode = SM_M_READ;
m_pointer_mode = SM_PM_B;
m_addr_load_ptr = 0;
}
break;
case 0x50:
if (m_page_data_size > 512)
{
logerror("nandflash: unsupported spare area select\n");
m_mode = SM_M_INIT;
}
else
{
m_mode = SM_M_READ;
m_pointer_mode = SM_PM_C;
m_addr_load_ptr = 0;
}
break;
case 0x80: // Page Program (1st cycle)
m_mode = SM_M_PROGRAM;
m_addr_load_ptr = 0;
m_program_byte_count = 0;
memset(m_pagereg.get(), 0xff, m_page_total_size);
break;
case 0x10: // Page Program (2nd cycle)
case 0x15:
if ((m_mode != SM_M_PROGRAM) && (m_mode != SM_M_RANDOM_DATA_INPUT))
{
logerror("nandflash: illegal page program confirm command\n");
m_mode = SM_M_INIT;
}
else
{
m_status = (m_status & 0x80) | m_accumulated_status;
// logerror( "nandflash: program, page_addr %08X\n", m_page_addr);
for (int i = 0; i < m_page_total_size; i++)
m_feeprom_data[m_page_addr * m_page_total_size + i] &= m_pagereg[i];
m_status |= 0x40;
if (data == 0x15)
m_accumulated_status = m_status & 0x1f;
else
m_accumulated_status = 0;
m_mode = SM_M_INIT;
m_write_rnb(0);
m_write_rnb(1);
}
break;
// case 0x11:
// break;
case 0x60: // Block Erase (1st cycle)
m_mode = SM_M_ERASE;
m_page_addr = 0;
m_addr_load_ptr = 0;
break;
case 0xd0: // Block Erase (2nd cycle)
if (m_mode != SM_M_ERASE)
{
logerror("nandflash: illegal block erase confirm command\n");
m_mode = SM_M_INIT;
}
else
{
m_status &= 0x80;
memset(m_feeprom_data.get() + ((m_page_addr & (-1 << m_log2_pages_per_block)) * m_page_total_size), 0xFF, (size_t)(1 << m_log2_pages_per_block) * m_page_total_size);
// logerror( "nandflash: erase, page_addr %08X, offset %08X, length %08X\n", m_page_addr, (m_page_addr & (-1 << m_log2_pages_per_block)) * m_page_total_size, (1 << m_log2_pages_per_block) * m_page_total_size);
m_status |= 0x40;
m_mode = SM_M_INIT;
if (m_pointer_mode == SM_PM_B)
m_pointer_mode = SM_PM_A;
m_write_rnb(0);
m_write_rnb(1);
}
break;
case 0x70: // Read Status
m_mode = SM_M_READSTATUS;
break;
// case 0x71:
// break;
case 0x90: // Read ID
m_mode = SM_M_READID;
m_addr_load_ptr = 0;
break;
// case 0x91:
// break;
case 0x30: // Read (2nd cycle)
if (m_col_address_cycles == 1)
{
m_mode = SM_M_30;
}
else
{
if (m_mode != SM_M_READ)
{
logerror("nandflash: illegal read 2nd cycle command\n");
m_mode = SM_M_INIT;
}
else if (m_addr_load_ptr < (m_col_address_cycles + m_row_address_cycles))
{
logerror("nandflash: read 2nd cycle, not enough address cycles (actual: %d, expected: %d)\n", m_addr_load_ptr, m_col_address_cycles + m_row_address_cycles);
m_mode = SM_M_INIT;
}
else
{
m_write_rnb(0);
m_write_rnb(1);
}
}
break;
case 0x65:
if (m_mode != SM_M_30)
{
logerror("nandflash: unexpected address port write\n");
m_mode = SM_M_INIT;
}
else
{
m_mode_3065 = true;
}
break;
case 0x05: // Random Data Output (1st cycle)
if ((m_mode != SM_M_READ) && (m_mode != SM_M_RANDOM_DATA_OUTPUT))
{
logerror("nandflash: illegal random data output command\n");
m_mode = SM_M_INIT;
}
else
{
m_mode = SM_M_RANDOM_DATA_OUTPUT;
m_addr_load_ptr = 0;
}
break;
case 0xE0: // Random Data Output (2nd cycle)
if (m_mode != SM_M_RANDOM_DATA_OUTPUT)
{
logerror("nandflash: illegal random data output confirm command\n");
m_mode = SM_M_INIT;
}
else
{
// do nothing
}
break;
case 0x85: // Random Data Input
if ((m_mode != SM_M_PROGRAM) && (m_mode != SM_M_RANDOM_DATA_INPUT))
{
logerror("nandflash: illegal random data input command\n");
m_mode = SM_M_INIT;
}
else
{
m_mode = SM_M_RANDOM_DATA_INPUT;
m_addr_load_ptr = 0;
m_program_byte_count = 0;
}
break;
default:
logerror("nandflash: unsupported command 0x%02x\n", data);
m_mode = SM_M_INIT;
break;
}
}
void nand_device::address_w(uint8_t data)
{
if (!is_present())
return;
switch (m_mode)
{
case SM_M_INIT:
logerror("nandflash: unexpected address port write\n");
break;
case SM_M_READ:
case SM_M_PROGRAM:
if (m_addr_load_ptr == 0)
{
m_page_addr = 0;
}
if ((m_addr_load_ptr == 0) && (m_col_address_cycles == 1))
{
switch (m_pointer_mode)
{
case SM_PM_A:
m_byte_addr = data;
break;
case SM_PM_B:
m_byte_addr = data + 256;
m_pointer_mode = SM_PM_A;
break;
case SM_PM_C:
if (!m_mode_3065)
m_byte_addr = (data & 0x0f) + m_page_data_size;
else
m_byte_addr = (data & 0x0f) + 256;
break;
}
}
else
{
if (m_addr_load_ptr < m_col_address_cycles)
{
m_byte_addr &= ~(0xFF << (m_addr_load_ptr * 8));
m_byte_addr |= (data << (m_addr_load_ptr * 8));
}
else if (m_addr_load_ptr < m_col_address_cycles + m_row_address_cycles)
{
m_page_addr &= ~(0xFF << ((m_addr_load_ptr - m_col_address_cycles) * 8));
m_page_addr |= (data << ((m_addr_load_ptr - m_col_address_cycles) * 8));
}
}
m_addr_load_ptr++;
break;
case SM_M_ERASE:
if (m_addr_load_ptr < m_row_address_cycles)
{
m_page_addr &= ~(0xFF << (m_addr_load_ptr * 8));
m_page_addr |= (data << (m_addr_load_ptr * 8));
}
m_addr_load_ptr++;
break;
case SM_M_RANDOM_DATA_INPUT:
case SM_M_RANDOM_DATA_OUTPUT:
if (m_addr_load_ptr < m_col_address_cycles)
{
m_byte_addr &= ~(0xFF << (m_addr_load_ptr * 8));
m_byte_addr |= (data << (m_addr_load_ptr * 8));
}
m_addr_load_ptr++;
break;
case SM_M_READSTATUS:
case SM_M_30:
logerror("nandflash: unexpected address port write\n");
break;
case SM_M_READID:
if (m_addr_load_ptr == 0)
m_byte_addr = data;
m_addr_load_ptr++;
break;
}
}
uint8_t nand_device::data_r()
{
uint8_t reply = 0;
if (!is_present())
return 0;
switch (m_mode)
{
case SM_M_INIT:
case SM_M_30:
logerror("nandflash: unexpected data port read\n");
break;
case SM_M_READ:
case SM_M_RANDOM_DATA_OUTPUT:
if (!m_mode_3065)
{
if (m_byte_addr < m_page_total_size)
{
if (m_page_addr < m_num_pages)
reply = m_feeprom_data[m_page_addr * m_page_total_size + m_byte_addr];
else
reply = 0xff;
}
else
{
reply = 0xFF;
}
}
else
{
if (m_data_uid_ptr != nullptr)
{
// FIXME: this appears to be incorrect, m_data_uid_ptr is a smaller structure of 256*16
// this code would always result in reading past the buffer
uint32_t addr = m_page_addr * m_page_total_size + m_byte_addr;
if (addr < 256 + 16)
reply = m_data_uid_ptr[addr];
}
else
{
reply = 0xff;
}
}
m_byte_addr++;
// "Sequential Row Read is available only on K9F5608U0D_Y,P,V,F or K9F5608D0D_Y,P"
if ((m_byte_addr == m_page_total_size) && (m_sequential_row_read != 0))
{
m_byte_addr = (m_pointer_mode != SM_PM_C) ? 0 : m_page_data_size;
m_page_addr++;
if (m_page_addr == m_num_pages)
m_page_addr = 0;
}
break;
case SM_M_PROGRAM:
case SM_M_RANDOM_DATA_INPUT:
case SM_M_ERASE:
logerror("nandflash: unexpected data port read\n");
break;
case SM_M_READSTATUS:
reply = m_status & 0xc1;
break;
case SM_M_READID:
if (m_byte_addr < m_id_len)
reply = m_id[m_byte_addr];
else
reply = 0;
m_byte_addr++;
break;
}
return reply;
}
void nand_device::data_w(uint8_t data)
{
if (!is_present())
return;
switch (m_mode)
{
case SM_M_INIT:
case SM_M_READ:
case SM_M_30:
case SM_M_RANDOM_DATA_OUTPUT:
logerror("nandflash: unexpected data port write\n");
break;
case SM_M_PROGRAM:
case SM_M_RANDOM_DATA_INPUT:
if (m_program_byte_count++ < m_page_total_size)
{
m_pagereg[m_byte_addr] = data;
}
m_byte_addr++;
if (m_byte_addr == m_page_total_size)
m_byte_addr = (m_pointer_mode != SM_PM_C) ? 0 : m_page_data_size;
break;
case SM_M_ERASE:
case SM_M_READSTATUS:
case SM_M_READID:
logerror("nandflash: unexpected data port write\n");
break;
}
}
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