Add qemu 2.4.0

[kvmfornfv.git] / qemu / hw / char / lm32_juart.c

diff --git a/qemu/hw/char/lm32_juart.c b/qemu/hw/char/lm32_juart.c
new file mode 100644 (file)
index 0000000..62763f2
--- /dev/null
+++ b/qemu/hw/char/lm32_juart.c
@@ -0,0 +1,164 @@
+/*
+ *  LatticeMico32 JTAG UART model.
+ *
+ *  Copyright (c) 2010 Michael Walle <michael@walle.cc>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "hw/hw.h"
+#include "hw/sysbus.h"
+#include "trace.h"
+#include "sysemu/char.h"
+
+#include "hw/char/lm32_juart.h"
+
+enum {
+    LM32_JUART_MIN_SAVE_VERSION = 0,
+    LM32_JUART_CURRENT_SAVE_VERSION = 0,
+    LM32_JUART_MAX_SAVE_VERSION = 0,
+};
+
+enum {
+    JTX_FULL = (1<<8),
+};
+
+enum {
+    JRX_FULL = (1<<8),
+};
+
+#define LM32_JUART(obj) OBJECT_CHECK(LM32JuartState, (obj), TYPE_LM32_JUART)
+
+struct LM32JuartState {
+    SysBusDevice parent_obj;
+
+    CharDriverState *chr;
+
+    uint32_t jtx;
+    uint32_t jrx;
+};
+typedef struct LM32JuartState LM32JuartState;
+
+uint32_t lm32_juart_get_jtx(DeviceState *d)
+{
+    LM32JuartState *s = LM32_JUART(d);
+
+    trace_lm32_juart_get_jtx(s->jtx);
+    return s->jtx;
+}
+
+uint32_t lm32_juart_get_jrx(DeviceState *d)
+{
+    LM32JuartState *s = LM32_JUART(d);
+
+    trace_lm32_juart_get_jrx(s->jrx);
+    return s->jrx;
+}
+
+void lm32_juart_set_jtx(DeviceState *d, uint32_t jtx)
+{
+    LM32JuartState *s = LM32_JUART(d);
+    unsigned char ch = jtx & 0xff;
+
+    trace_lm32_juart_set_jtx(s->jtx);
+
+    s->jtx = jtx;
+    if (s->chr) {
+        qemu_chr_fe_write_all(s->chr, &ch, 1);
+    }
+}
+
+void lm32_juart_set_jrx(DeviceState *d, uint32_t jtx)
+{
+    LM32JuartState *s = LM32_JUART(d);
+
+    trace_lm32_juart_set_jrx(s->jrx);
+    s->jrx &= ~JRX_FULL;
+}
+
+static void juart_rx(void *opaque, const uint8_t *buf, int size)
+{
+    LM32JuartState *s = opaque;
+
+    s->jrx = *buf | JRX_FULL;
+}
+
+static int juart_can_rx(void *opaque)
+{
+    LM32JuartState *s = opaque;
+
+    return !(s->jrx & JRX_FULL);
+}
+
+static void juart_event(void *opaque, int event)
+{
+}
+
+static void juart_reset(DeviceState *d)
+{
+    LM32JuartState *s = LM32_JUART(d);
+
+    s->jtx = 0;
+    s->jrx = 0;
+}
+
+static int lm32_juart_init(SysBusDevice *dev)
+{
+    LM32JuartState *s = LM32_JUART(dev);
+
+    /* FIXME use a qdev chardev prop instead of qemu_char_get_next_serial() */
+    s->chr = qemu_char_get_next_serial();
+    if (s->chr) {
+        qemu_chr_add_handlers(s->chr, juart_can_rx, juart_rx, juart_event, s);
+    }
+
+    return 0;
+}
+
+static const VMStateDescription vmstate_lm32_juart = {
+    .name = "lm32-juart",
+    .version_id = 1,
+    .minimum_version_id = 1,
+    .fields = (VMStateField[]) {
+        VMSTATE_UINT32(jtx, LM32JuartState),
+        VMSTATE_UINT32(jrx, LM32JuartState),
+        VMSTATE_END_OF_LIST()
+    }
+};
+
+static void lm32_juart_class_init(ObjectClass *klass, void *data)
+{
+    DeviceClass *dc = DEVICE_CLASS(klass);
+    SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass);
+
+    k->init = lm32_juart_init;
+    dc->reset = juart_reset;
+    dc->vmsd = &vmstate_lm32_juart;
+    /* Reason: init() method uses qemu_char_get_next_serial() */
+    dc->cannot_instantiate_with_device_add_yet = true;
+}
+
+static const TypeInfo lm32_juart_info = {
+    .name          = TYPE_LM32_JUART,
+    .parent        = TYPE_SYS_BUS_DEVICE,
+    .instance_size = sizeof(LM32JuartState),
+    .class_init    = lm32_juart_class_init,
+};
+
+static void lm32_juart_register_types(void)
+{
+    type_register_static(&lm32_juart_info);
+}
+
+type_init(lm32_juart_register_types)