summaryrefslogtreecommitdiffstatshomepage
path: root/src/devices/machine/sis7018_audio.cpp
diff options
context:
space:
mode:
Diffstat (limited to 'src/devices/machine/sis7018_audio.cpp')
-rw-r--r--src/devices/machine/sis7018_audio.cpp163
1 files changed, 163 insertions, 0 deletions
diff --git a/src/devices/machine/sis7018_audio.cpp b/src/devices/machine/sis7018_audio.cpp
new file mode 100644
index 00000000000..afcbfb13efd
--- /dev/null
+++ b/src/devices/machine/sis7018_audio.cpp
@@ -0,0 +1,163 @@
+// license: BSD-3-Clause
+// copyright-holders: Angelo Salese
+/**************************************************************************************************
+
+SiS 7018 Audio device (AC97 complaint)
+
+TODO:
+- Stub interface, to be improved;
+- Reportedly based off Trident 4DWave technology, some registers effectively matches up;
+
+**************************************************************************************************/
+
+#include "emu.h"
+#include "sis7018_audio.h"
+
+#define LOG_IO (1U << 1) // log PCI register accesses
+#define LOG_TODO (1U << 2) // log unimplemented registers
+#define LOG_MAP (1U << 3) // log full remaps
+#define LOG_PMC (1U << 4) // log PMC access
+
+#define VERBOSE (LOG_GENERAL | LOG_IO | LOG_TODO | LOG_MAP | LOG_PMC)
+//#define LOG_OUTPUT_FUNC osd_printf_warning
+
+#include "logmacro.h"
+
+#define LOGIO(...) LOGMASKED(LOG_IO, __VA_ARGS__)
+#define LOGMAP(...) LOGMASKED(LOG_MAP, __VA_ARGS__)
+#define LOGTODO(...) LOGMASKED(LOG_TODO, __VA_ARGS__)
+#define LOGPMC(...) LOGMASKED(LOG_PMC, __VA_ARGS__)
+
+DEFINE_DEVICE_TYPE(SIS7018_AUDIO, sis7018_audio_device, "sis7018_audio", "SiS 7018 Audio AC97")
+
+sis7018_audio_device::sis7018_audio_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock)
+ : pci_device(mconfig, SIS7018_AUDIO, tag, owner, clock)
+ , m_joy(*this, "pc_joy")
+{
+ // 0x040100 - Multimedia device, audio device (vendor specific i/f)
+ // 0x01 - Rev 1
+ set_ids(0x10397018, 0x01, 0x040100, 0x00);
+}
+
+void sis7018_audio_device::device_add_mconfig(machine_config &config)
+{
+ PC_JOY(config, m_joy);
+ // ...
+}
+
+// NOTE: prefer using Trident naming if a register is there too.
+void sis7018_audio_device::config_map(address_map &map)
+{
+ pci_device::config_map(map);
+
+ map(0x48, 0xe3).rw(FUNC(sis7018_audio_device::unmap_log_r), FUNC(sis7018_audio_device::unmap_log_w));
+
+ map(0x44, 0x44).lrw8(
+ NAME([this] (offs_t offset) {
+ return m_legacy_io_base;
+ }),
+ NAME([this] (offs_t offset, u8 data) {
+ LOGIO("PCI $44: Legacy I/O base %02x\n", data);
+ m_legacy_io_base = data;
+ remap_cb();
+ })
+ );
+ // 0x45 Legacy DMA Decoding
+ // 0x46 PM_CFG Power Management Config (Legacy Control on Trident)
+
+ // PMC capability identifier
+ map(0xdc, 0xdf).r(FUNC(sis7018_audio_device::pmc_id_r));
+// map(0xe0, 0xe3).r(FUNC(sis7018_audio_device::pmc_status_r), FUNC(sis7018_audio_device::pmc_control_w));
+}
+
+u8 sis7018_audio_device::capptr_r()
+{
+ LOGIO("AUDIO Read capptr_r [$34]\n");
+ return 0xdc;
+}
+
+// TODO: move to specific interface
+u32 sis7018_audio_device::pmc_id_r()
+{
+ LOGPMC("Read PMC ID [$dc]\n");
+ // bits 31-16 PPMI v1.0, D1 / D2 supported, no PCI clock for PME#
+ // bits 15-8 0x00 no NEXT_PTR (NULL terminates here)
+ // bits 7-0 PM_CAP_ID (0x01 for PMC)
+ return 0xe6110001;
+}
+
+void sis7018_audio_device::memory_map(address_map &map)
+{
+
+}
+
+void sis7018_audio_device::io_map(address_map &map)
+{
+
+}
+
+void sis7018_audio_device::device_start()
+{
+ pci_device::device_start();
+ add_map(256, M_IO, FUNC(sis7018_audio_device::io_map));
+ // not explicitly stated, assume 4096 size from the MEM decoding
+ add_map(4096, M_MEM, FUNC(sis7018_audio_device::memory_map));
+
+ // TODO: PCI regs 0x3e/0x3f max_lat = 0x18, min_gnt = 0x02
+}
+
+
+void sis7018_audio_device::device_reset()
+{
+ pci_device::device_reset();
+
+ command = 0x0000;
+ status = 0x0000;
+ // INTA#
+ intr_pin = 1;
+ // TODO: can be written to with $46=1
+ subsystem_id = 0x10397018;
+
+ m_legacy_io_base = 0xe2; // 0xf0 on Trident
+ remap_cb();
+}
+
+void sis7018_audio_device::map_extra(uint64_t memory_window_start, uint64_t memory_window_end, uint64_t memory_offset, address_space *memory_space,
+ uint64_t io_window_start, uint64_t io_window_end, uint64_t io_offset, address_space *io_space)
+{
+ // if(BIT(m_legacy_io_base, 7))
+ // const u16 mpu401base_io_addr = 0x300 | (BIT(m_legacy_io_base, 6) ? 0x00 : 0x30);
+
+ if (BIT(m_legacy_io_base, 5))
+ {
+ const u16 gamebase_io_addr = 0x200 | (BIT(m_legacy_io_base, 4) << 3);
+ io_space->install_device(gamebase_io_addr, gamebase_io_addr | 0x7, *this, &sis7018_audio_device::gameport_map);
+ }
+
+ // if(BIT(m_legacy_io_base, 3))
+ // const u16 adlibbase_io_addr = 0x388 | (BIT(m_legacy_io_base, 2) << 2);
+
+ // if(BIT(m_legacy_io_base, 1))
+ // const u16 sbbase_io_addr = 0x200 | (BIT(m_legacy_io_base, 0) ? 0x20 : 0x40);
+}
+
+// 200h / 208h
+void sis7018_audio_device::gameport_map(address_map &map)
+{
+ map(0x00, 0x07).rw(m_joy, FUNC(pc_joy_device::joy_port_r), FUNC(pc_joy_device::joy_port_w));
+}
+
+/*
+ * Debugging
+ */
+
+u8 sis7018_audio_device::unmap_log_r(offs_t offset)
+{
+ LOGTODO("AUDIO Unemulated [%02x] R\n", offset + 0x48);
+ return 0;
+}
+
+void sis7018_audio_device::unmap_log_w(offs_t offset, u8 data)
+{
+ LOGTODO("AUDIO Unemulated [%02x] %02x W\n", offset + 0x48, data);
+}