super barebones xdk superio chip

hw/Makefile.objs

@@ -213,6 +213,6 @@ obj-$(CONFIG_KVM) += ivshmem.o
 obj-$(CONFIG_LINUX) += vfio_pci.o
 endif
 
-obj-$(CONFIG_XBOX) += xbox_pci.o acpi_xbox.o amd_smbus.o nvnet.o nv2a.o nv2a_vsh.o mcpx_apu.o mcpx_aci.o smbus_xbox_smc.o smbus_cx25871.o smbus_adm1032.o
+obj-$(CONFIG_XBOX) += xbox_pci.o acpi_xbox.o amd_smbus.o nvnet.o nv2a.o nv2a_vsh.o mcpx_apu.o mcpx_aci.o smbus_xbox_smc.o smbus_cx25871.o smbus_adm1032.o lpc47m157.o
 
 endif

hw/lpc47m157.c

@@ -0,0 +1,168 @@
+/*
+ * QEMU SMSC LPC47M157 (Super I/O)
+ *
+ * Copyright (c) 2013 espes
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 or
+ * (at your option) version 3 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "hw/isa.h"
+
+
+#define ENTER_CONFIG_KEY    0x55
+#define EXIT_CONFIG_KEY     0xAA
+
+#define MAX_CONFIG_REG 0x30
+#define CONFIG_DEVICE_NUMBER    0x07
+#define CONFIG_PORT_LOW         0x26
+#define CONFIG_PORT_HIGH        0x27
+
+#define DEVICE_FDD              0x0
+#define DEVICE_PARALLEL_PORT    0x3
+#define DEVICE_SERIAL_PORT_1    0x4
+#define DEVICE_SERIAL_PORT_2    0x5
+#define DEVICE_KEYBOARD         0x7
+#define DEVICE_GAME_PORT        0x9
+#define DEVICE_PME              0xA
+#define DEVICE_MPU_401          0xB
+
+#define CONFIG_DEVICE_BASE_ADDRESS_HIGH     0x60
+#define CONFIG_DEVICE_BASE_ADDRESS_LOW      0x61
+
+#define DEBUG_LPC47M157
+
+typedef struct LPC47M157State {
+    ISADevice dev;
+
+    MemoryRegion io;
+
+    bool configuration_mode;
+    uint32_t selected_reg;
+
+    uint8_t config_regs[MAX_CONFIG_REG];
+} LPC47M157State;
+
+#define LPC47M157_DEVICE(obj) \
+    OBJECT_CHECK(LPC47M157State, (obj), "lpc47m157")
+
+static void lpc47m157_io_write(void *opaque, hwaddr addr, uint64_t val,
+                               unsigned int size)
+{
+    LPC47M157State *s = opaque;
+
+#ifdef DEBUG_LPC47M157
+    printf("lpc47m157 io write 0x%llx = 0x%llx\n", addr, val);
+#endif
+
+    if (addr == 0) { //INDEX_PORT
+        if (val == ENTER_CONFIG_KEY) {
+            assert(!s->configuration_mode);
+            s->configuration_mode = true;
+        } else if (val == EXIT_CONFIG_KEY) {
+            assert(s->configuration_mode);
+            s->configuration_mode = false;
+        } else {
+            s->selected_reg = val;
+        }
+    } else if (addr == 1) { //DATA_PORT
+        if (s->selected_reg < MAX_CONFIG_REG) {
+            //global configuration register
+            s->config_regs[s->selected_reg] = val;
+        } else {
+            if (s->config_regs[CONFIG_DEVICE_NUMBER] == DEVICE_SERIAL_PORT_1) {
+
+            } else {
+                assert(false);
+            }
+        }
+    } else {
+        assert(false);
+    }
+}
+
+static uint64_t lpc47m157_io_read(void *opaque, hwaddr addr, unsigned int size)
+{
+    LPC47M157State *s = opaque;
+    uint32_t val = 0;
+
+    if (addr == 0) { //INDEX_PORT
+
+    } else if (addr == 1) { //DATA_PORT
+        if (s->selected_reg < MAX_CONFIG_REG) {
+            val = s->config_regs[s->selected_reg];
+        } else {
+
+        }
+    } else {
+        assert(false);
+    }
+
+#ifdef DEBUG_LPC47M157
+    printf("lpc47m157 io read 0x%llx -> 0x%x\n", addr, val);
+#endif
+
+    return val;
+}
+
+static const MemoryRegionOps lpc47m157_io_ops = {
+    .read  = lpc47m157_io_read,
+    .write = lpc47m157_io_write,
+    .valid = {
+        .min_access_size = 1,
+        .max_access_size = 1,
+    },
+};
+
+static int lpc47m157_init(ISADevice *dev)
+{
+    LPC47M157State *s;
+    ISABus *bus;
+
+    s = LPC47M157_DEVICE(dev);
+    bus = isa_bus_from_device(dev);
+
+    const uint32_t iobase = 0x2e; //0x4e if SYSOPT pin, make it a property 
+    s->config_regs[CONFIG_PORT_LOW] = iobase & 0xFF;
+    s->config_regs[CONFIG_PORT_HIGH] = iobase >> 8;
+
+    memory_region_init_io(&s->io, &lpc47m157_io_ops, s, "lpc47m157", 2);
+    isa_register_ioport(dev, &s->io, iobase);
+
+    return 0;
+}
+
+static void lpc47m157_class_init(ObjectClass *klass, void *data)
+{
+    DeviceClass *dc = DEVICE_CLASS(klass);
+    ISADeviceClass *ic = ISA_DEVICE_CLASS(klass);
+
+    ic->init = lpc47m157_init;
+    //dc->reset = pc87312_reset;
+    //dc->vmsd = &vmstate_pc87312;
+    //dc->props = pc87312_properties;
+}
+
+static const TypeInfo lpc47m157_type_info = {
+    .name          = "lpc47m157",
+    .parent        = TYPE_ISA_DEVICE,
+    .instance_size = sizeof(LPC47M157State),
+    .class_init    = lpc47m157_class_init,
+};
+
+static void lpc47m157_register_types(void)
+{
+    type_register_static(&lpc47m157_type_info);
+}
+
+type_init(lpc47m157_register_types)