diff options
Diffstat (limited to 'src/devices/machine/i2cmem.cpp')
-rw-r--r-- | src/devices/machine/i2cmem.cpp | 121 |
1 files changed, 87 insertions, 34 deletions
diff --git a/src/devices/machine/i2cmem.cpp b/src/devices/machine/i2cmem.cpp index 94670ff5326..34e75569a49 100644 --- a/src/devices/machine/i2cmem.cpp +++ b/src/devices/machine/i2cmem.cpp @@ -58,8 +58,14 @@ static inline void ATTR_PRINTF( 3, 4 ) verboselog( device_t *device, int n_level //************************************************************************** // device type definition -DEFINE_DEVICE_TYPE(I2CMEM, i2cmem_device, "i2cmem", "I2C Memory") -DEFINE_DEVICE_TYPE(X2404P, x2404p_device, "x2404p", "X2404P I2C Memory") +DEFINE_DEVICE_TYPE(I2CMEM, i2cmem_device, "i2cmem", "I2C Memory") +DEFINE_DEVICE_TYPE(I2C_X2404P, i2c_x2404p_device, "x2404p", "X2404P I2C Memory") +DEFINE_DEVICE_TYPE(I2C_24C01, i2c_24c01_device, "24c01", "24C01 I2C Memory") +DEFINE_DEVICE_TYPE(I2C_24C02, i2c_24c02_device, "24c02", "24C02 I2C Memory") +DEFINE_DEVICE_TYPE(I2C_24C08, i2c_24c08_device, "24c08", "24C08 I2C Memory") +DEFINE_DEVICE_TYPE(I2C_24C16, i2c_24c16_device, "24c16", "24C16 I2C Memory") +DEFINE_DEVICE_TYPE(I2C_24C16A, i2c_24c16a_device, "24c16a", "24C16A I2C Memory") +DEFINE_DEVICE_TYPE(I2C_24C64, i2c_24c64_device, "24c64", "24C64 I2C Memory") //************************************************************************** // LIVE DEVICE @@ -69,36 +75,76 @@ DEFINE_DEVICE_TYPE(X2404P, x2404p_device, "x2404p", "X2404P I2C Memory") // i2cmem_device - constructor //------------------------------------------------- -i2cmem_device::i2cmem_device(const machine_config &mconfig, device_type type, const char *tag, device_t *owner, uint32_t clock) - : device_t(mconfig, type, tag, owner, clock), +i2cmem_device::i2cmem_device( + const machine_config &mconfig, + device_type type, + const char *tag, + device_t *owner, + uint32_t clock, + int page_size, + int data_size) : + device_t(mconfig, type, tag, owner, clock), device_nvram_interface(mconfig, *this), m_region(*this, DEVICE_SELF), - m_slave_address( I2CMEM_SLAVE_ADDRESS ), - m_page_size( 0 ), - m_data_size( 0 ), - m_scl( 0 ), - m_sdaw( 0 ), - m_e0( 0 ), - m_e1( 0 ), - m_e2( 0 ), - m_wc( 0 ), - m_sdar( 1 ), - m_state( STATE_IDLE ), - m_shift( 0 ), - m_byteaddr( 0 ) + m_slave_address(I2CMEM_SLAVE_ADDRESS), + m_page_size(page_size), + m_data_size(data_size), + m_scl(0), + m_sdaw(0), + m_e0(0), + m_e1(0), + m_e2(0), + m_wc(0), + m_sdar(1), + m_state(STATE_IDLE), + m_shift(0), + m_byteaddr(0), + m_page_offset(0), + m_page_written_size(0), + m_in_write(false) { + // these memories work off the I2C clock only + assert(!clock); } -i2cmem_device::i2cmem_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock) - : i2cmem_device(mconfig, I2CMEM, tag, owner, clock) +i2cmem_device::i2cmem_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock) : + i2cmem_device(mconfig, I2CMEM, tag, owner, clock, 0, 0) { } -x2404p_device::x2404p_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock) - : i2cmem_device(mconfig, X2404P, tag, owner, clock) +i2c_x2404p_device::i2c_x2404p_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock) : + i2cmem_device(mconfig, I2C_X2404P, tag, owner, clock, 8, 0x200) +{ +} + +i2c_24c01_device::i2c_24c01_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock) : + i2cmem_device(mconfig, I2C_24C01, tag, owner, clock, 4, 0x80) +{ +} + +i2c_24c02_device::i2c_24c02_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock) : + i2cmem_device(mconfig, I2C_24C02, tag, owner, clock, 4, 0x100) +{ +} + +i2c_24c08_device::i2c_24c08_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock) : + i2cmem_device(mconfig, I2C_24C08, tag, owner, clock, 0, 0x400) +{ +} + +i2c_24c16_device::i2c_24c16_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock) : + i2cmem_device(mconfig, I2C_24C16, tag, owner, clock, 8, 0x800) +{ +} + +i2c_24c16a_device::i2c_24c16a_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock) : + i2cmem_device(mconfig, I2C_24C16A, tag, owner, clock, 0, 0x800) +{ +} + +i2c_24c64_device::i2c_24c64_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock) : + i2cmem_device(mconfig, I2C_24C64, tag, owner, clock, 8, 0x2000) { - set_page_size(8); - set_data_size(0x200); } //------------------------------------------------- @@ -122,6 +168,9 @@ void i2cmem_device::device_start() save_item( NAME(m_shift) ); save_item( NAME(m_devsel) ); save_item( NAME(m_byteaddr) ); + save_item( NAME(m_in_write) ); + save_item( NAME(m_page_offset) ); + save_item( NAME(m_page_written_size) ); save_pointer( &m_data[0], "m_data", m_data_size ); if ( m_page_size > 0 ) { @@ -136,6 +185,7 @@ void i2cmem_device::device_start() void i2cmem_device::device_reset() { + m_in_write = false; } @@ -237,6 +287,15 @@ WRITE_LINE_MEMBER( i2cmem_device::write_sda ) { if( m_sdaw ) { + if( m_in_write ) + { + int base = data_offset(); + int root = base & ~( m_page_size - 1); + for( int i=0; i < m_page_written_size; i++) + m_data[root | ((base + i) & (m_page_size - 1))] = m_page[i]; + m_in_write = false; + verboselog( this, 1, "data[ %04x to %04x ] = %x bytes\n", base, root | ((base + m_page_written_size - 1) & (m_page_size - 1)), m_page_written_size ); + } verboselog( this, 1, "stop\n" ); m_state = STATE_IDLE; } @@ -301,6 +360,7 @@ WRITE_LINE_MEMBER( i2cmem_device::write_scl ) case STATE_BYTEADDR: m_byteaddr = m_shift; m_page_offset = 0; + m_page_written_size = 0; verboselog( this, 1, "byteaddr %02x\n", m_byteaddr ); @@ -315,23 +375,16 @@ WRITE_LINE_MEMBER( i2cmem_device::write_scl ) } else if( m_page_size > 0 ) { + m_in_write = true; m_page[ m_page_offset ] = m_shift; verboselog( this, 1, "page[ %04x ] <- %02x\n", m_page_offset, m_page[ m_page_offset ] ); m_page_offset++; if( m_page_offset == m_page_size ) - { - int offset = data_offset() & ~( m_page_size - 1 ); - - verboselog( this, 1, "data[ %04x to %04x ] = page\n", offset, offset + m_page_size - 1 ); - - for( int i = 0; i < m_page_size; i++ ) - { - m_data[offset + i] = m_page[ i ]; - } - m_page_offset = 0; - } + m_page_written_size++; + if( m_page_written_size > m_page_size) + m_page_written_size = m_page_size; } else { |