1 files changed, 324 insertions, 0 deletions
diff --git a/hw/input/adb.c b/hw/input/adb.c
new file mode 100644
index 000000000..84331b9fc
--- /dev/null
+++ b/hw/input/adb.c
@@ -0,0 +1,324 @@
+/*
+ * QEMU ADB support
+ *
+ * Copyright (c) 2004 Fabrice Bellard
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#include "qemu/osdep.h"
+#include "hw/input/adb.h"
+#include "hw/qdev-properties.h"
+#include "migration/vmstate.h"
+#include "qemu/module.h"
+#include "qemu/timer.h"
+#include "adb-internal.h"
+#include "trace.h"
+
+/* error codes */
+#define ADB_RET_NOTPRESENT (-2)
+
+static const char *adb_commands[] = {
+    "RESET", "FLUSH", "(Reserved 0x2)", "(Reserved 0x3)",
+    "Reserved (0x4)", "(Reserved 0x5)", "(Reserved 0x6)", "(Reserved 0x7)",
+    "LISTEN r0", "LISTEN r1", "LISTEN r2", "LISTEN r3",
+    "TALK r0", "TALK r1", "TALK r2", "TALK r3",
+};
+
+static void adb_device_reset(ADBDevice *d)
+{
+    qdev_reset_all(DEVICE(d));
+}
+
+static int do_adb_request(ADBBusState *s, uint8_t *obuf, const uint8_t *buf,
+                          int len)
+{
+    ADBDevice *d;
+    ADBDeviceClass *adc;
+    int devaddr, cmd, olen, i;
+
+    cmd = buf[0] & 0xf;
+    if (cmd == ADB_BUSRESET) {
+        for (i = 0; i < s->nb_devices; i++) {
+            d = s->devices[i];
+            adb_device_reset(d);
+        }
+        s->status = 0;
+        return 0;
+    }
+
+    s->pending = 0;
+    for (i = 0; i < s->nb_devices; i++) {
+        d = s->devices[i];
+        adc = ADB_DEVICE_GET_CLASS(d);
+
+        if (adc->devhasdata(d)) {
+            s->pending |= (1 << d->devaddr);
+        }
+    }
+
+    s->status = 0;
+    devaddr = buf[0] >> 4;
+    for (i = 0; i < s->nb_devices; i++) {
+        d = s->devices[i];
+        adc = ADB_DEVICE_GET_CLASS(d);
+
+        if (d->devaddr == devaddr) {
+            olen = adc->devreq(d, obuf, buf, len);
+            if (!olen) {
+                s->status |= ADB_STATUS_BUSTIMEOUT;
+            }
+            return olen;
+        }
+    }
+
+    s->status |= ADB_STATUS_BUSTIMEOUT;
+    return ADB_RET_NOTPRESENT;
+}
+
+int adb_request(ADBBusState *s, uint8_t *obuf, const uint8_t *buf, int len)
+{
+    int ret;
+
+    trace_adb_bus_request(buf[0] >> 4, adb_commands[buf[0] & 0xf], len);
+
+    assert(s->autopoll_blocked);
+
+    ret = do_adb_request(s, obuf, buf, len);
+
+    trace_adb_bus_request_done(buf[0] >> 4, adb_commands[buf[0] & 0xf], ret);
+    return ret;
+}
+
+int adb_poll(ADBBusState *s, uint8_t *obuf, uint16_t poll_mask)
+{
+    ADBDevice *d;
+    int olen, i;
+    uint8_t buf[1];
+
+    olen = 0;
+    for (i = 0; i < s->nb_devices; i++) {
+        if (s->poll_index >= s->nb_devices) {
+            s->poll_index = 0;
+        }
+        d = s->devices[s->poll_index];
+        if ((1 << d->devaddr) & poll_mask) {
+            buf[0] = ADB_READREG | (d->devaddr << 4);
+            olen = do_adb_request(s, obuf + 1, buf, 1);
+            /* if there is data, we poll again the same device */
+            if (olen > 0) {
+                s->status |= ADB_STATUS_POLLREPLY;
+                obuf[0] = buf[0];
+                olen++;
+                return olen;
+            }
+        }
+        s->poll_index++;
+    }
+    return olen;
+}
+
+void adb_set_autopoll_enabled(ADBBusState *s, bool enabled)
+{
+    if (s->autopoll_enabled != enabled) {
+        s->autopoll_enabled = enabled;
+        if (s->autopoll_enabled) {
+            timer_mod(s->autopoll_timer,
+                      qemu_clock_get_ms(QEMU_CLOCK_VIRTUAL) +
+                      s->autopoll_rate_ms);
+        } else {
+            timer_del(s->autopoll_timer);
+        }
+    }
+}
+
+void adb_set_autopoll_rate_ms(ADBBusState *s, int rate_ms)
+{
+    s->autopoll_rate_ms = rate_ms;
+
+    if (s->autopoll_enabled) {
+        timer_mod(s->autopoll_timer,
+                  qemu_clock_get_ms(QEMU_CLOCK_VIRTUAL) +
+                  s->autopoll_rate_ms);
+    }
+}
+
+void adb_set_autopoll_mask(ADBBusState *s, uint16_t mask)
+{
+    if (s->autopoll_mask != mask) {
+        s->autopoll_mask = mask;
+        if (s->autopoll_enabled && s->autopoll_mask) {
+            timer_mod(s->autopoll_timer,
+                      qemu_clock_get_ms(QEMU_CLOCK_VIRTUAL) +
+                      s->autopoll_rate_ms);
+        } else {
+            timer_del(s->autopoll_timer);
+        }
+    }
+}
+
+void adb_autopoll_block(ADBBusState *s)
+{
+    s->autopoll_blocked = true;
+    trace_adb_bus_autopoll_block(s->autopoll_blocked);
+
+    if (s->autopoll_enabled) {
+        timer_del(s->autopoll_timer);
+    }
+}
+
+void adb_autopoll_unblock(ADBBusState *s)
+{
+    s->autopoll_blocked = false;
+    trace_adb_bus_autopoll_block(s->autopoll_blocked);
+
+    if (s->autopoll_enabled) {
+        timer_mod(s->autopoll_timer,
+                  qemu_clock_get_ms(QEMU_CLOCK_VIRTUAL) +
+                  s->autopoll_rate_ms);
+    }
+}
+
+static void adb_autopoll(void *opaque)
+{
+    ADBBusState *s = opaque;
+
+    if (!s->autopoll_blocked) {
+        trace_adb_bus_autopoll_cb(s->autopoll_mask);
+        s->autopoll_cb(s->autopoll_cb_opaque);
+        trace_adb_bus_autopoll_cb_done(s->autopoll_mask);
+    }
+
+    timer_mod(s->autopoll_timer,
+              qemu_clock_get_ms(QEMU_CLOCK_VIRTUAL) +
+              s->autopoll_rate_ms);
+}
+
+void adb_register_autopoll_callback(ADBBusState *s, void (*cb)(void *opaque),
+                                    void *opaque)
+{
+    s->autopoll_cb = cb;
+    s->autopoll_cb_opaque = opaque;
+}
+
+static const VMStateDescription vmstate_adb_bus = {
+    .name = "adb_bus",
+    .version_id = 0,
+    .minimum_version_id = 0,
+    .fields = (VMStateField[]) {
+        VMSTATE_TIMER_PTR(autopoll_timer, ADBBusState),
+        VMSTATE_BOOL(autopoll_enabled, ADBBusState),
+        VMSTATE_UINT8(autopoll_rate_ms, ADBBusState),
+        VMSTATE_UINT16(autopoll_mask, ADBBusState),
+        VMSTATE_BOOL(autopoll_blocked, ADBBusState),
+        VMSTATE_END_OF_LIST()
+    }
+};
+
+static void adb_bus_reset(BusState *qbus)
+{
+    ADBBusState *adb_bus = ADB_BUS(qbus);
+
+    adb_bus->autopoll_enabled = false;
+    adb_bus->autopoll_mask = 0xffff;
+    adb_bus->autopoll_rate_ms = 20;
+}
+
+static void adb_bus_realize(BusState *qbus, Error **errp)
+{
+    ADBBusState *adb_bus = ADB_BUS(qbus);
+
+    adb_bus->autopoll_timer = timer_new_ms(QEMU_CLOCK_VIRTUAL, adb_autopoll,
+                                           adb_bus);
+
+    vmstate_register(NULL, -1, &vmstate_adb_bus, adb_bus);
+}
+
+static void adb_bus_unrealize(BusState *qbus)
+{
+    ADBBusState *adb_bus = ADB_BUS(qbus);
+
+    timer_del(adb_bus->autopoll_timer);
+
+    vmstate_unregister(NULL, &vmstate_adb_bus, adb_bus);
+}
+
+static void adb_bus_class_init(ObjectClass *klass, void *data)
+{
+    BusClass *k = BUS_CLASS(klass);
+
+    k->realize = adb_bus_realize;
+    k->unrealize = adb_bus_unrealize;
+    k->reset = adb_bus_reset;
+}
+
+static const TypeInfo adb_bus_type_info = {
+    .name = TYPE_ADB_BUS,
+    .parent = TYPE_BUS,
+    .instance_size = sizeof(ADBBusState),
+    .class_init = adb_bus_class_init,
+};
+
+const VMStateDescription vmstate_adb_device = {
+    .name = "adb_device",
+    .version_id = 0,
+    .minimum_version_id = 0,
+    .fields = (VMStateField[]) {
+        VMSTATE_INT32(devaddr, ADBDevice),
+        VMSTATE_INT32(handler, ADBDevice),
+        VMSTATE_END_OF_LIST()
+    }
+};
+
+static void adb_device_realizefn(DeviceState *dev, Error **errp)
+{
+    ADBDevice *d = ADB_DEVICE(dev);
+    ADBBusState *bus = ADB_BUS(qdev_get_parent_bus(dev));
+
+    if (bus->nb_devices >= MAX_ADB_DEVICES) {
+        return;
+    }
+
+    bus->devices[bus->nb_devices++] = d;
+}
+
+static void adb_device_class_init(ObjectClass *oc, void *data)
+{
+    DeviceClass *dc = DEVICE_CLASS(oc);
+
+    dc->realize = adb_device_realizefn;
+    dc->bus_type = TYPE_ADB_BUS;
+}
+
+static const TypeInfo adb_device_type_info = {
+    .name = TYPE_ADB_DEVICE,
+    .parent = TYPE_DEVICE,
+    .class_size = sizeof(ADBDeviceClass),
+    .instance_size = sizeof(ADBDevice),
+    .abstract = true,
+    .class_init = adb_device_class_init,
+};
+
+static void adb_register_types(void)
+{
+    type_register_static(&adb_bus_type_info);
+    type_register_static(&adb_device_type_info);
+}
+
+type_init(adb_register_types)