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qemu/hw/display/jazz_led.c
Richard Henderson f0613160d2 hw/display: Constify VMState 
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20231221031652.119827-27-richard.henderson@linaro.org>
2023-12-29 11:17:30 +11:00

321 lines
9.2 KiB
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/*
* QEMU JAZZ LED emulator.
*
* Copyright (c) 2007-2012 Herve Poussineau
*
* 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 "qemu/module.h"
#include "ui/console.h"
#include "ui/pixel_ops.h"
#include "trace.h"
#include "hw/sysbus.h"
#include "migration/vmstate.h"
#include "qom/object.h"
typedef enum {
REDRAW_NONE = 0, REDRAW_SEGMENTS = 1, REDRAW_BACKGROUND = 2,
} screen_state_t;
#define TYPE_JAZZ_LED "jazz-led"
OBJECT_DECLARE_SIMPLE_TYPE(LedState, JAZZ_LED)
struct LedState {
SysBusDevice parent_obj;
MemoryRegion iomem;
uint8_t segments;
QemuConsole *con;
screen_state_t state;
};
static uint64_t jazz_led_read(void *opaque, hwaddr addr,
unsigned int size)
{
LedState *s = opaque;
uint8_t val;
val = s->segments;
trace_jazz_led_read(addr, val);
return val;
}
static void jazz_led_write(void *opaque, hwaddr addr,
uint64_t val, unsigned int size)
{
LedState *s = opaque;
uint8_t new_val = val & 0xff;
trace_jazz_led_write(addr, new_val);
s->segments = new_val;
s->state |= REDRAW_SEGMENTS;
}
static const MemoryRegionOps led_ops = {
.read = jazz_led_read,
.write = jazz_led_write,
.endianness = DEVICE_NATIVE_ENDIAN,
.impl.min_access_size = 1,
.impl.max_access_size = 1,
};
/***********************************************************/
/* jazz_led display */
static void draw_horizontal_line(DisplaySurface *ds,
int posy, int posx1, int posx2,
uint32_t color)
{
uint8_t *d;
int x, bpp;
bpp = (surface_bits_per_pixel(ds) + 7) >> 3;
d = surface_data(ds) + surface_stride(ds) * posy + bpp * posx1;
switch (bpp) {
case 1:
for (x = posx1; x <= posx2; x++) {
*((uint8_t *)d) = color;
d++;
}
break;
case 2:
for (x = posx1; x <= posx2; x++) {
*((uint16_t *)d) = color;
d += 2;
}
break;
case 4:
for (x = posx1; x <= posx2; x++) {
*((uint32_t *)d) = color;
d += 4;
}
break;
}
}
static void draw_vertical_line(DisplaySurface *ds,
int posx, int posy1, int posy2,
uint32_t color)
{
uint8_t *d;
int y, bpp;
bpp = (surface_bits_per_pixel(ds) + 7) >> 3;
d = surface_data(ds) + surface_stride(ds) * posy1 + bpp * posx;
switch (bpp) {
case 1:
for (y = posy1; y <= posy2; y++) {
*((uint8_t *)d) = color;
d += surface_stride(ds);
}
break;
case 2:
for (y = posy1; y <= posy2; y++) {
*((uint16_t *)d) = color;
d += surface_stride(ds);
}
break;
case 4:
for (y = posy1; y <= posy2; y++) {
*((uint32_t *)d) = color;
d += surface_stride(ds);
}
break;
}
}
static void jazz_led_update_display(void *opaque)
{
LedState *s = opaque;
DisplaySurface *surface = qemu_console_surface(s->con);
uint8_t *d1;
uint32_t color_segment, color_led;
int y, bpp;
if (s->state & REDRAW_BACKGROUND) {
/* clear screen */
bpp = (surface_bits_per_pixel(surface) + 7) >> 3;
d1 = surface_data(surface);
for (y = 0; y < surface_height(surface); y++) {
memset(d1, 0x00, surface_width(surface) * bpp);
d1 += surface_stride(surface);
}
}
if (s->state & REDRAW_SEGMENTS) {
/* set colors according to bpp */
switch (surface_bits_per_pixel(surface)) {
case 8:
color_segment = rgb_to_pixel8(0xaa, 0xaa, 0xaa);
color_led = rgb_to_pixel8(0x00, 0xff, 0x00);
break;
case 15:
color_segment = rgb_to_pixel15(0xaa, 0xaa, 0xaa);
color_led = rgb_to_pixel15(0x00, 0xff, 0x00);
break;
case 16:
color_segment = rgb_to_pixel16(0xaa, 0xaa, 0xaa);
color_led = rgb_to_pixel16(0x00, 0xff, 0x00);
break;
case 24:
color_segment = rgb_to_pixel24(0xaa, 0xaa, 0xaa);
color_led = rgb_to_pixel24(0x00, 0xff, 0x00);
break;
case 32:
color_segment = rgb_to_pixel32(0xaa, 0xaa, 0xaa);
color_led = rgb_to_pixel32(0x00, 0xff, 0x00);
break;
default:
return;
}
/* display segments */
draw_horizontal_line(surface, 40, 10, 40,
(s->segments & 0x02) ? color_segment : 0);
draw_vertical_line(surface, 10, 10, 40,
(s->segments & 0x04) ? color_segment : 0);
draw_vertical_line(surface, 10, 40, 70,
(s->segments & 0x08) ? color_segment : 0);
draw_horizontal_line(surface, 70, 10, 40,
(s->segments & 0x10) ? color_segment : 0);
draw_vertical_line(surface, 40, 40, 70,
(s->segments & 0x20) ? color_segment : 0);
draw_vertical_line(surface, 40, 10, 40,
(s->segments & 0x40) ? color_segment : 0);
draw_horizontal_line(surface, 10, 10, 40,
(s->segments & 0x80) ? color_segment : 0);
/* display led */
if (!(s->segments & 0x01)) {
color_led = 0; /* black */
}
draw_horizontal_line(surface, 68, 50, 50, color_led);
draw_horizontal_line(surface, 69, 49, 51, color_led);
draw_horizontal_line(surface, 70, 48, 52, color_led);
draw_horizontal_line(surface, 71, 49, 51, color_led);
draw_horizontal_line(surface, 72, 50, 50, color_led);
}
s->state = REDRAW_NONE;
dpy_gfx_update_full(s->con);
}
static void jazz_led_invalidate_display(void *opaque)
{
LedState *s = opaque;
s->state |= REDRAW_SEGMENTS | REDRAW_BACKGROUND;
}
static void jazz_led_text_update(void *opaque, console_ch_t *chardata)
{
LedState *s = opaque;
char buf[3];
dpy_text_cursor(s->con, -1, -1);
qemu_console_resize(s->con, 2, 1);
/* TODO: draw the segments */
snprintf(buf, 3, "%02hhx", s->segments);
console_write_ch(chardata++, ATTR2CHTYPE(buf[0], QEMU_COLOR_BLUE,
QEMU_COLOR_BLACK, 1));
console_write_ch(chardata++, ATTR2CHTYPE(buf[1], QEMU_COLOR_BLUE,
QEMU_COLOR_BLACK, 1));
dpy_text_update(s->con, 0, 0, 2, 1);
}
static int jazz_led_post_load(void *opaque, int version_id)
{
/* force refresh */
jazz_led_invalidate_display(opaque);
return 0;
}
static const VMStateDescription vmstate_jazz_led = {
.name = "jazz-led",
.version_id = 0,
.minimum_version_id = 0,
.post_load = jazz_led_post_load,
.fields = (const VMStateField[]) {
VMSTATE_UINT8(segments, LedState),
VMSTATE_END_OF_LIST()
}
};
static const GraphicHwOps jazz_led_ops = {
.invalidate = jazz_led_invalidate_display,
.gfx_update = jazz_led_update_display,
.text_update = jazz_led_text_update,
};
static void jazz_led_init(Object *obj)
{
LedState *s = JAZZ_LED(obj);
SysBusDevice *dev = SYS_BUS_DEVICE(obj);
memory_region_init_io(&s->iomem, obj, &led_ops, s, "led", 1);
sysbus_init_mmio(dev, &s->iomem);
}
static void jazz_led_realize(DeviceState *dev, Error **errp)
{
LedState *s = JAZZ_LED(dev);
s->con = graphic_console_init(dev, 0, &jazz_led_ops, s);
}
static void jazz_led_reset(DeviceState *d)
{
LedState *s = JAZZ_LED(d);
s->segments = 0;
s->state = REDRAW_SEGMENTS | REDRAW_BACKGROUND;
qemu_console_resize(s->con, 60, 80);
}
static void jazz_led_class_init(ObjectClass *klass, void *data)
{
DeviceClass *dc = DEVICE_CLASS(klass);
dc->desc = "Jazz LED display",
dc->vmsd = &vmstate_jazz_led;
dc->reset = jazz_led_reset;
dc->realize = jazz_led_realize;
}
static const TypeInfo jazz_led_info = {
.name = TYPE_JAZZ_LED,
.parent = TYPE_SYS_BUS_DEVICE,
.instance_size = sizeof(LedState),
.instance_init = jazz_led_init,
.class_init = jazz_led_class_init,
};
static void jazz_led_register(void)
{
type_register_static(&jazz_led_info);
}
type_init(jazz_led_register);
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