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authorYang Zhang <yang.z.zhang@intel.com>2015-08-28 09:58:54 +0800
committerYang Zhang <yang.z.zhang@intel.com>2015-09-01 12:44:00 +0800
commite44e3482bdb4d0ebde2d8b41830ac2cdb07948fb (patch)
tree66b09f592c55df2878107a468a91d21506104d3f /qemu/hw/char/lm32_juart.c
parent9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 (diff)
Add qemu 2.4.0
Change-Id: Ic99cbad4b61f8b127b7dc74d04576c0bcbaaf4f5 Signed-off-by: Yang Zhang <yang.z.zhang@intel.com>
Diffstat (limited to 'qemu/hw/char/lm32_juart.c')
-rw-r--r--qemu/hw/char/lm32_juart.c164
1 files changed, 164 insertions, 0 deletions
diff --git a/qemu/hw/char/lm32_juart.c b/qemu/hw/char/lm32_juart.c
new file mode 100644
index 000000000..62763f2f4
--- /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)