The VT8231 south bridge is very similar to VT82C686B but there are
some differences in register addresses and functionality, e.g. the
VT8231 only has one serial port. This commit adds VT8231_SUPERIO
subclass based on the abstract VIA_SUPERIO class to emulate the
superio part of VT8231.
Signed-off-by: BALATON Zoltan <bala...@eik.bme.hu>
Reviewed-by: Philippe Mathieu-Daudé <f4...@amsat.org>
---
hw/isa/vt82c686.c | 121 ++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 121 insertions(+)
diff --git a/hw/isa/vt82c686.c b/hw/isa/vt82c686.c
index e89dbf43da..8131cb42a9 100644
--- a/hw/isa/vt82c686.c
+++ b/hw/isa/vt82c686.c
@@ -491,6 +491,126 @@ static const TypeInfo vt82c686b_superio_info = {
};
+#define TYPE_VT8231_SUPERIO "vt8231-superio"
+
+static void vt8231_superio_cfg_write(void *opaque, hwaddr addr,
+ uint64_t data, unsigned size)
+{
+ ViaSuperIOState *sc = opaque;
+ uint8_t idx = sc->regs[0];
+
+ if (addr == 0) { /* config index register */
+ sc->regs[0] = data;
+ return;
+ }
+
+ /* config data register */
+ trace_via_superio_write(idx, data);
+ switch (idx) {
+ case 0x00 ... 0xdf:
+ case 0xe7 ... 0xef:
+ case 0xf0 ... 0xf1:
+ case 0xf5:
+ case 0xf8:
+ case 0xfd:
+ /* ignore write to read only registers */
+ return;
+ case 0xf2: /* Function select */
+ {
+ data &= 0x17;
+ if (data & BIT(2)) { /* Serial port enable */
+ ISADevice *dev = sc->superio.serial[0];
+ if (!memory_region_is_mapped(sc->serial_io[0])) {
+ memory_region_add_subregion(isa_address_space_io(dev),
+ dev->ioport_id, sc->serial_io[0]);
+ }
+ } else {
+ MemoryRegion *io = isa_address_space_io(sc->superio.serial[0]);
+ if (memory_region_is_mapped(sc->serial_io[0])) {
+ memory_region_del_subregion(io, sc->serial_io[0]);
+ }
+ }
+ break;
+ }
+ case 0xf4: /* Serial port io base address */
+ {
+ data &= 0xfe;
+ sc->superio.serial[0]->ioport_id = data << 2;
+ if (memory_region_is_mapped(sc->serial_io[0])) {
+ memory_region_set_address(sc->serial_io[0], data << 2);
+ }
+ break;
+ }
+ default:
+ qemu_log_mask(LOG_UNIMP,
+ "via_superio_cfg: unimplemented register 0x%x\n", idx);
+ break;
+ }
+ sc->regs[idx] = data;
+}
+
+static const MemoryRegionOps vt8231_superio_cfg_ops = {
+ .read = via_superio_cfg_read,
+ .write = vt8231_superio_cfg_write,
+ .endianness = DEVICE_NATIVE_ENDIAN,
+ .impl = {
+ .min_access_size = 1,
+ .max_access_size = 1,
+ },
+};
+
+static void vt8231_superio_reset(DeviceState *dev)
+{
+ ViaSuperIOState *s = VIA_SUPERIO(dev);
+
+ memset(s->regs, 0, sizeof(s->regs));
+ /* Device ID */
+ s->regs[0xf0] = 0x3c;
+ /* Device revision */
+ s->regs[0xf1] = 0x01;
+ /* Function select - all disabled */
+ vt8231_superio_cfg_write(s, 0, 0xf2, 1);
+ vt8231_superio_cfg_write(s, 1, 0x03, 1);
+ /* Serial port base addr */
+ vt8231_superio_cfg_write(s, 0, 0xf4, 1);
+ vt8231_superio_cfg_write(s, 1, 0xfe, 1);
+ /* Parallel port base addr */
+ vt8231_superio_cfg_write(s, 0, 0xf6, 1);
+ vt8231_superio_cfg_write(s, 1, 0xde, 1);
+ /* Floppy ctrl base addr */
+ vt8231_superio_cfg_write(s, 0, 0xf7, 1);
+ vt8231_superio_cfg_write(s, 1, 0xfc, 1);
+
+ vt8231_superio_cfg_write(s, 0, 0, 1);
+}
+
+static void vt8231_superio_init(Object *obj)
+{
+ VIA_SUPERIO(obj)->io_ops = &vt8231_superio_cfg_ops;
+}
+
+static void vt8231_superio_class_init(ObjectClass *klass, void *data)
+{
+ DeviceClass *dc = DEVICE_CLASS(klass);
+ ISASuperIOClass *sc = ISA_SUPERIO_CLASS(klass);
+
+ dc->reset = vt8231_superio_reset;
+ sc->serial.count = 1;
+ sc->parallel.count = 1;
+ sc->ide.count = 0; /* emulated by via-ide */
+ sc->floppy.count = 1;
+}
+
+static const TypeInfo vt8231_superio_info = {
+ .name = TYPE_VT8231_SUPERIO,
+ .parent = TYPE_VIA_SUPERIO,
+ .instance_size = sizeof(ViaSuperIOState),
+ .instance_init = vt8231_superio_init,
+ .class_size = sizeof(ISASuperIOClass),
+ .class_init = vt8231_superio_class_init,
+};
+
+
OBJECT_DECLARE_SIMPLE_TYPE(VT82C686BISAState, VT82C686B_ISA)
struct VT82C686BISAState {
@@ -614,6 +734,7 @@ static void vt82c686b_register_types(void)
type_register_static(&vt8231_pm_info);
type_register_static(&via_superio_info);
type_register_static(&vt82c686b_superio_info);
+ type_register_static(&vt8231_superio_info);
type_register_static(&via_info);
}
--
2.21.3
