// license:BSD-3-Clause
// copyright-holders:Aaron Giles
/*************************************************************************
SMC91C9X ethernet controller implementation
by Aaron Giles, Jean-François DEL NERO
**************************************************************************/
#ifndef MAME_MACHINE_SMC91C9X_H
#define MAME_MACHINE_SMC91C9X_H
/***************************************************************************
TYPE DEFINITIONS
***************************************************************************/
class smc91c9x_device : public device_t,public device_network_interface
{
public:
template <class Object> devcb_base &set_irq_callback(Object &&cb) { return m_irq_handler.set_callback(std::forward<Object>(cb)); }
DECLARE_READ16_MEMBER( read );
DECLARE_WRITE16_MEMBER( write );
TIMER_CALLBACK_MEMBER(send_frame);
virtual void recv_cb(uint8_t *data, int length) override;
void set_link_connected(bool connected) { m_link_unconnected = !connected; };
protected:
smc91c9x_device(const machine_config &mconfig, device_type type, const char *tag, device_t *owner, uint32_t clock);
// device-level overrides
virtual void device_start() override;
virtual void device_reset() override;
virtual void device_pre_save(void) override;
virtual void device_post_load(void) override;
private:
static constexpr unsigned ETHER_BUFFER_SIZE = 2048;
// TODO: 96 device is larger
static constexpr unsigned ETHER_BUFFERS = 16;
static constexpr unsigned ETHERNET_ADDR_SIZE = 6;
// external network is present
bool m_network_available;
// mmu
// The bits in these vectors indicate a packet has been allocated
u32 m_alloc_rx, m_alloc_tx;
std::vector<u32> m_comp_tx, m_comp_rx;
// Fifo for allocated (queued) transmit packets
std::vector<u32> m_trans_tx;
// Save vector data and sizes for proper save state restoration
u32 m_comp_tx_data[ETHER_BUFFERS], m_comp_rx_data[ETHER_BUFFERS], m_trans_tx_data[ETHER_BUFFERS];
u32 m_comp_tx_size, m_comp_rx_size, m_trans_tx_size;
// Requests a packet allocation and returns true
// and sets the packet number if successful
bool alloc_req(const int tx, int &packet_num);
// Releases an allocation
void alloc_release(const int packet_num);
// Resets the MMU
void mmu_reset();
// internal state
devcb_write_line m_irq_handler;
// link unconnected
bool m_link_unconnected;
/* raw register data and masks */
uint16_t m_reg[64];
uint16_t m_regmask[64];
/* IRQ information */
uint8_t m_irq_state;
// Main memory
uint8_t m_buffer[ETHER_BUFFER_SIZE * ETHER_BUFFERS];
/* counters */
uint32_t m_sent;
uint32_t m_recd;
emu_timer* m_tx_timer;
int ethernet_packet_is_for_me(const uint8_t *mac_address);
int is_broadcast(const uint8_t *mac_address);
void update_ethernet_irq();
void update_stats();
void process_command(uint16_t data);
void clear_tx_fifo();
void clear_rx_fifo();
};
class smc91c94_device : public smc91c9x_device
{
public:
smc91c94_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock);
};
class smc91c96_device : public smc91c9x_device
{
public:
smc91c96_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock);
};
DECLARE_DEVICE_TYPE(SMC91C94, smc91c94_device)
DECLARE_DEVICE_TYPE(SMC91C96, smc91c96_device)
/***************************************************************************
DEVICE CONFIGURATION MACROS
***************************************************************************/
#define MCFG_SMC91C94_ADD(tag) \
MCFG_DEVICE_ADD((tag), SMC91C94, 0)
#define MCFG_SMC91C94_IRQ_CALLBACK(write) \
downcast<smc91c94_device &>(*device).set_irq_callback(DEVCB_##write);
#define MCFG_SMC91C96_ADD(tag) \
MCFG_DEVICE_ADD((tag), SMC91C96, 0)
#define MCFG_SMC91C96_IRQ_CALLBACK(write) \
downcast<smc91c96_device &>(*device).set_irq_callback(DEVCB_##write);
#endif // MAME_MACHINE_SMC91C9X_H