mirror of
https://github.com/xemu-project/xemu.git
synced 2024-11-25 04:30:02 +00:00
15d7dc4f80
This patch adds the JTAG UART model. It is accessed through special control registers and opcodes. Therefore the translation uses callbacks to this model. Signed-off-by: Michael Walle <michael@walle.cc> Signed-off-by: Edgar E. Iglesias <edgar.iglesias@gmail.com>
151 lines
3.4 KiB
C
151 lines
3.4 KiB
C
/*
|
|
* 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.h"
|
|
#include "sysbus.h"
|
|
#include "trace.h"
|
|
#include "qemu-char.h"
|
|
|
|
#include "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),
|
|
};
|
|
|
|
struct LM32JuartState {
|
|
SysBusDevice busdev;
|
|
CharDriverState *chr;
|
|
|
|
uint32_t jtx;
|
|
uint32_t jrx;
|
|
};
|
|
typedef struct LM32JuartState LM32JuartState;
|
|
|
|
uint32_t lm32_juart_get_jtx(DeviceState *d)
|
|
{
|
|
LM32JuartState *s = container_of(d, LM32JuartState, busdev.qdev);
|
|
|
|
trace_lm32_juart_get_jtx(s->jtx);
|
|
return s->jtx;
|
|
}
|
|
|
|
uint32_t lm32_juart_get_jrx(DeviceState *d)
|
|
{
|
|
LM32JuartState *s = container_of(d, LM32JuartState, busdev.qdev);
|
|
|
|
trace_lm32_juart_get_jrx(s->jrx);
|
|
return s->jrx;
|
|
}
|
|
|
|
void lm32_juart_set_jtx(DeviceState *d, uint32_t jtx)
|
|
{
|
|
LM32JuartState *s = container_of(d, LM32JuartState, busdev.qdev);
|
|
unsigned char ch = jtx & 0xff;
|
|
|
|
trace_lm32_juart_set_jtx(s->jtx);
|
|
|
|
s->jtx = jtx;
|
|
if (s->chr) {
|
|
qemu_chr_write(s->chr, &ch, 1);
|
|
}
|
|
}
|
|
|
|
void lm32_juart_set_jrx(DeviceState *d, uint32_t jtx)
|
|
{
|
|
LM32JuartState *s = container_of(d, LM32JuartState, busdev.qdev);
|
|
|
|
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 = container_of(d, LM32JuartState, busdev.qdev);
|
|
|
|
s->jtx = 0;
|
|
s->jrx = 0;
|
|
}
|
|
|
|
static int lm32_juart_init(SysBusDevice *dev)
|
|
{
|
|
LM32JuartState *s = FROM_SYSBUS(typeof(*s), dev);
|
|
|
|
s->chr = qdev_init_chardev(&dev->qdev);
|
|
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,
|
|
.minimum_version_id_old = 1,
|
|
.fields = (VMStateField[]) {
|
|
VMSTATE_UINT32(jtx, LM32JuartState),
|
|
VMSTATE_UINT32(jrx, LM32JuartState),
|
|
VMSTATE_END_OF_LIST()
|
|
}
|
|
};
|
|
|
|
static SysBusDeviceInfo lm32_juart_info = {
|
|
.init = lm32_juart_init,
|
|
.qdev.name = "lm32-juart",
|
|
.qdev.size = sizeof(LM32JuartState),
|
|
.qdev.vmsd = &vmstate_lm32_juart,
|
|
.qdev.reset = juart_reset,
|
|
};
|
|
|
|
static void lm32_juart_register(void)
|
|
{
|
|
sysbus_register_withprop(&lm32_juart_info);
|
|
}
|
|
|
|
device_init(lm32_juart_register)
|