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// license:BSD-3-Clause
// copyright-holders:David Haywood
#include "emu.h"
#include "elan_eu3a05gpio.h"
DEFINE_DEVICE_TYPE(ELAN_EU3A05_GPIO, elan_eu3a05gpio_device, "elan_eu3a05gpio", "Elan EU3A05 GPIO")
elan_eu3a05gpio_device::elan_eu3a05gpio_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock) :
device_t(mconfig, ELAN_EU3A05_GPIO, tag, owner, clock),
m_write_0_callback(*this),
m_write_1_callback(*this),
m_write_2_callback(*this),
m_read_0_callback(*this),
m_read_1_callback(*this),
m_read_2_callback(*this)
{
}
void elan_eu3a05gpio_device::device_start()
{
m_write_0_callback.resolve_safe();
m_write_1_callback.resolve_safe();
m_write_2_callback.resolve_safe();
m_read_0_callback.resolve_safe(0xff);
m_read_1_callback.resolve_safe(0xff);
m_read_2_callback.resolve_safe(0xff);
}
void elan_eu3a05gpio_device::device_reset()
{
for (int i = 0; i < 3; i++)
{
m_ddr[i] = 0;
m_unk[i] = 0;
}
}
uint8_t elan_eu3a05gpio_device::read_port_data(int which)
{
//todo, actually use the direction registers
switch (which)
{
case 0: return m_read_0_callback();
case 1: return m_read_1_callback();
case 2: return m_read_2_callback();
}
return 0xff;
}
uint8_t elan_eu3a05gpio_device::read_direction(int which)
{
return m_ddr[which];
}
uint8_t elan_eu3a05gpio_device::gpio_r(offs_t offset)
{
int port = offset/2;
if (!(offset&1)) return read_direction(port);
else return read_port_data(port);
}
void elan_eu3a05gpio_device::write_port_data(int which, uint8_t data)
{
//todo, actually use the direction registers
logerror("%s: write_port_data (port %d) %02x (direction register %02x)\n", machine().describe_context(), which, data, m_ddr[which]);
switch (which)
{
case 0: return m_write_0_callback(data); break;
case 1: return m_write_1_callback(data); break;
case 2: return m_write_2_callback(data); break;
}
}
void elan_eu3a05gpio_device::write_direction(int which, uint8_t data)
{
logerror("%s: write_direction (port %d) %02x\n", machine().describe_context(), which, data);
m_ddr[which] = data;
}
void elan_eu3a05gpio_device::gpio_w(offs_t offset, uint8_t data)
{
int port = offset/2;
if (!(offset&1)) return write_direction(port, data);
else return write_port_data(port, data);
}
void elan_eu3a05gpio_device::gpio_unk_w(offs_t offset, uint8_t data)
{
logerror("%s: gpio_unk_w (port %d) %02x (direction register %02x)\n", machine().describe_context(), offset, data, m_ddr[offset]);
}
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