// 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_read_callback(*this, 0xff), m_write_callback(*this) { } void elan_eu3a05gpio_device::device_start() { } 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 return m_read_callback[which](); } 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]); return m_write_callback[which](data); } 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]); }