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-rw-r--r--src/devices/machine/ps2timer.cpp272
1 files changed, 272 insertions, 0 deletions
diff --git a/src/devices/machine/ps2timer.cpp b/src/devices/machine/ps2timer.cpp
new file mode 100644
index 00000000000..70970a6784a
--- /dev/null
+++ b/src/devices/machine/ps2timer.cpp
@@ -0,0 +1,272 @@
+// license:BSD-3-Clause
+// copyright-holders:Ryan Holtz
+/******************************************************************************
+*
+* Sony PlayStation 2 EE timer device skeleton
+*
+* To Do:
+* Everything
+*
+*/
+
+#include "emu.h"
+#include "ps2timer.h"
+
+DEFINE_DEVICE_TYPE(SONYPS2_TIMER, ps2_timer_device, "ps2timer", "PlayStation 2 EE Core Timer")
+
+ps2_timer_device::ps2_timer_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock)
+ : device_t(mconfig, SONYPS2_TIMER, tag, owner, clock)
+ , m_compare_timer(nullptr)
+ , m_overflow_timer(nullptr)
+ , m_mode(0)
+ , m_last_enable_time(attotime::zero)
+ , m_last_update_time(attotime::zero)
+ , m_elapsed_time(attotime::zero)
+ , m_enabled(false)
+ , m_zero_return(false)
+ , m_count(0)
+ , m_compare(0)
+ , m_can_hold(false)
+ , m_hold(0)
+ , m_clk_select(CLKS_BUSCLK1)
+ , m_gate_enable(false)
+ , m_gate_select(GATS_HBLNK)
+ , m_gate_mode(GATM_LOW)
+ , m_cmp_int_enabled(false)
+ , m_cmp_int(false)
+ , m_ovf_int_enabled(false)
+ , m_ovf_int(false)
+{
+}
+
+void ps2_timer_device::device_start()
+{
+ if (!m_compare_timer)
+ m_compare_timer = machine().scheduler().timer_alloc(timer_expired_delegate(FUNC(ps2_timer_device::compare), this));
+
+ if (!m_overflow_timer)
+ m_overflow_timer = machine().scheduler().timer_alloc(timer_expired_delegate(FUNC(ps2_timer_device::overflow), this));
+}
+
+void ps2_timer_device::device_reset()
+{
+ m_mode = 0;
+
+ m_last_enable_time = attotime::zero;
+ m_last_update_time = attotime::zero;
+ m_elapsed_time = attotime::zero;
+
+ m_enabled = false;
+ m_zero_return = false;
+
+ m_count = 0;
+ m_compare = 0;
+
+ m_can_hold = false;
+ m_hold = 0;
+
+ m_clk_select = CLKS_BUSCLK1;
+
+ m_gate_enable = false;
+ m_gate_select = GATS_HBLNK;
+ m_gate_mode = GATM_LOW;
+
+ m_cmp_int_enabled = false;
+ m_cmp_int = false;
+
+ m_ovf_int_enabled = false;
+ m_ovf_int = false;
+
+ m_compare_timer->adjust(attotime::never);
+ m_overflow_timer->adjust(attotime::never);
+}
+
+void ps2_timer_device::update_gate()
+{
+ // TODO
+}
+
+void ps2_timer_device::update_interrupts()
+{
+ // TODO
+}
+
+void ps2_timer_device::update_compare_timer()
+{
+ // TODO
+}
+
+void ps2_timer_device::update_overflow_timer()
+{
+ // TODO
+}
+
+void ps2_timer_device::update_count()
+{
+ if (!m_enabled) return;
+ uint32_t frequency = 0;
+
+ switch (m_clk_select)
+ {
+ case CLKS_BUSCLK1:
+ frequency = clock();
+ break;
+ case CLKS_BUSCLK16:
+ frequency = clock() / 16;
+ break;
+ case CLKS_BUSCLK256:
+ frequency = clock() / 256;
+ break;
+ case CLKS_HBLNK:
+ frequency = clock() / 18700;
+ break;
+ }
+
+ attotime curr_time = machine().scheduler().time();
+ attotime time_delta = curr_time - m_last_update_time;
+ m_last_update_time = curr_time;
+ m_elapsed_time += time_delta;
+ uint32_t ticks = (uint32_t)m_elapsed_time.as_ticks(frequency);
+ if (ticks > 0)
+ {
+ m_elapsed_time -= attotime::from_ticks(ticks, frequency);
+ m_count += ticks;
+ m_count &= 0xffff;
+ }
+}
+
+void ps2_timer_device::update_hold()
+{
+ // TODO
+}
+
+void ps2_timer_device::set_mode(uint32_t data)
+{
+ static const char *clks_names[4] = { "BUSCLK", "BUSCLK/16", "BUSCLK/256", "HBLNK" };
+ static const char *gatm_names[4] = { "low", "reset+rising", "reset+falling", "reset+both" };
+ logerror("%s: CLKS=%s, GATE=%d, GATS=%cBLNK\n", machine().describe_context(), clks_names[data & 3], BIT(data, 2), BIT(data, 3) ? 'V' : 'H');
+ logerror("%s: GATM=%s, ZRET=%d, CUE=%d\n", machine().describe_context(), gatm_names[(data >> 4) & 3], BIT(data, 6), BIT(data, 7));
+ logerror("%s: CMPE=%d, OVFE=%d, %s, %s\n", machine().describe_context(), BIT(data, 8), BIT(data, 9), BIT(data, 10) ? "Clear Equal" : "", BIT(data, 11) ? "Clear Overflow" : "");
+
+ if (!(data & (MODE_EQUF | MODE_OVFF)) && data == m_mode) return;
+
+ const uint32_t old = m_mode;
+ m_mode = data;
+ const uint32_t changed = old ^ data;
+
+ m_clk_select = (timer_clock_select)(data & 3);
+ m_gate_enable = BIT(data, 2);
+ m_gate_select = BIT(data, 3) ? GATS_VBLNK : GATS_HBLNK;
+ m_gate_mode = (timer_gate_mode)((data >> 4) & 3);
+ m_zero_return = BIT(data, 6);
+ m_enabled = BIT(data, 7);
+
+ if (changed & (MODE_GATE | MODE_GATS | MODE_GATM))
+ {
+ update_gate();
+ }
+
+ if (changed & (MODE_CUE | MODE_CLKS | MODE_ZRET))
+ {
+ update_compare_timer();
+ update_overflow_timer();
+ }
+
+ if (changed & (MODE_CMPE | MODE_OVFE | MODE_EQUF | MODE_OVFF))
+ {
+ m_cmp_int_enabled = BIT(data, 8);
+ m_ovf_int_enabled = BIT(data, 9);
+ m_cmp_int = BIT(data, 10) ? 0 : m_cmp_int;
+ m_ovf_int = BIT(data, 11) ? 0 : m_ovf_int;
+ update_interrupts();
+ }
+}
+
+TIMER_CALLBACK_MEMBER(ps2_timer_device::compare)
+{
+}
+
+TIMER_CALLBACK_MEMBER(ps2_timer_device::overflow)
+{
+}
+
+READ32_MEMBER(ps2_timer_device::read)
+{
+ uint32_t ret = 0;
+ switch (offset)
+ {
+ case 0x00:
+ {
+ const uint32_t old = m_count;
+ update_count();
+ ret = m_count;
+ if (old != m_count)
+ logerror("%s: PS2 timer read: COUNT (%08x & %08x)\n", machine().describe_context(), ret, mem_mask);
+ break;
+ }
+
+ case 0x02:
+ ret = m_mode;
+ logerror("%s: PS2 timer read: MODE (%08x & %08x)\n", machine().describe_context(), ret, mem_mask);
+ break;
+
+ case 0x04:
+ ret = m_compare;
+ logerror("%s: PS2 timer read: COMP (%08x & %08x)\n", machine().describe_context(), ret, mem_mask);
+ break;
+
+ case 0x06:
+ ret = m_hold;
+ logerror("%s: PS2 timer read: HOLD (%08x & %08x)\n", machine().describe_context(), ret, mem_mask);
+ break;
+
+ default:
+ break;
+ }
+ return ret;
+}
+
+WRITE32_MEMBER(ps2_timer_device::write)
+{
+ switch (offset)
+ {
+ case 0x00:
+ m_count = data;
+ logerror("%s: PS2 timer write: COUNT = %08x & %08x\n", machine().describe_context(), data, mem_mask);
+ update_compare_timer();
+ update_overflow_timer();
+ break;
+
+ case 0x02:
+ set_mode(data);
+ break;
+
+ case 0x04:
+ {
+ logerror("%s: PS2 timer write: COMP = %08x & %08x\n", machine().describe_context(), data, mem_mask);
+ if (m_compare == data)
+ break;
+
+ m_compare = data;
+ update_compare_timer();
+ break;
+ }
+
+ case 0x06:
+ {
+ if (!m_can_hold)
+ break;
+
+ logerror("%s: PS2 timer write: HOLD = %08x & %08x\n", machine().describe_context(), data, mem_mask);
+ if (m_hold == data)
+ break;
+
+ m_hold = data;
+ update_hold();
+ break;
+ }
+
+ default:
+ break;
+ }
+}