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qemu/hw/jazz_led.c

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/*
* QEMU JAZZ LED emulator.
*
* Copyright (c) 2007 Hervé 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 "hw.h"
#include "mips.h"
#include "console.h"
#include "pixel_ops.h"
//#define DEBUG_LED
typedef enum {
REDRAW_NONE = 0, REDRAW_SEGMENTS = 1, REDRAW_BACKGROUND = 2,
} screen_state_t;
typedef struct LedState {
target_phys_addr_t base;
uint8_t segments;
DisplayState *ds;
screen_state_t state;
} LedState;
static uint32_t led_readb(void *opaque, target_phys_addr_t addr)
{
LedState *s = opaque;
int relative_addr = addr - s->base;
uint32_t val;
switch (relative_addr) {
case 0:
val = s->segments;
break;
default:
#ifdef DEBUG_LED
printf("jazz led: invalid read [0x%x]\n", relative_addr);
#endif
val = 0;
}
return val;
}
static uint32_t led_readw(void *opaque, target_phys_addr_t addr)
{
uint32_t v;
#ifdef TARGET_WORDS_BIGENDIAN
v = led_readb(opaque, addr) << 8;
v |= led_readb(opaque, addr + 1);
#else
v = led_readb(opaque, addr);
v |= led_readb(opaque, addr + 1) << 8;
#endif
return v;
}
static uint32_t led_readl(void *opaque, target_phys_addr_t addr)
{
uint32_t v;
#ifdef TARGET_WORDS_BIGENDIAN
v = led_readb(opaque, addr) << 24;
v |= led_readb(opaque, addr + 1) << 16;
v |= led_readb(opaque, addr + 2) << 8;
v |= led_readb(opaque, addr + 3);
#else
v = led_readb(opaque, addr);
v |= led_readb(opaque, addr + 1) << 8;
v |= led_readb(opaque, addr + 2) << 16;
v |= led_readb(opaque, addr + 3) << 24;
#endif
return v;
}
static void led_writeb(void *opaque, target_phys_addr_t addr, uint32_t val)
{
LedState *s = opaque;
int relative_addr = addr - s->base;
switch (relative_addr) {
case 0:
s->segments = val;
s->state |= REDRAW_SEGMENTS;
break;
default:
#ifdef DEBUG_LED
printf("jazz led: invalid write of 0x%02x at [0x%x]\n", val, relative_addr);
#endif
break;
}
}
static void led_writew(void *opaque, target_phys_addr_t addr, uint32_t val)
{
#ifdef TARGET_WORDS_BIGENDIAN
led_writeb(opaque, addr, (val >> 8) & 0xff);
led_writeb(opaque, addr + 1, val & 0xff);
#else
led_writeb(opaque, addr, val & 0xff);
led_writeb(opaque, addr + 1, (val >> 8) & 0xff);
#endif
}
static void led_writel(void *opaque, target_phys_addr_t addr, uint32_t val)
{
#ifdef TARGET_WORDS_BIGENDIAN
led_writeb(opaque, addr, (val >> 24) & 0xff);
led_writeb(opaque, addr + 1, (val >> 16) & 0xff);
led_writeb(opaque, addr + 2, (val >> 8) & 0xff);
led_writeb(opaque, addr + 3, val & 0xff);
#else
led_writeb(opaque, addr, val & 0xff);
led_writeb(opaque, addr + 1, (val >> 8) & 0xff);
led_writeb(opaque, addr + 2, (val >> 16) & 0xff);
led_writeb(opaque, addr + 3, (val >> 24) & 0xff);
#endif
}
static CPUReadMemoryFunc *led_read[3] = {
led_readb,
led_readw,
led_readl,
};
static CPUWriteMemoryFunc *led_write[3] = {
led_writeb,
led_writew,
led_writel,
};
/***********************************************************/
/* jazz_led display */
static void draw_horizontal_line(DisplayState *ds, int posy, int posx1, int posx2, uint32_t color)
{
uint8_t *d;
int x, bpp;
bpp = (ds->depth + 7) >> 3;
d = ds->data + ds->linesize * 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(DisplayState *ds, int posx, int posy1, int posy2, uint32_t color)
{
uint8_t *d;
int y, bpp;
bpp = (ds->depth + 7) >> 3;
d = ds->data + ds->linesize * posy1 + bpp * posx;
switch(bpp) {
case 1:
for (y = posy1; y <= posy2; y++) {
*((uint8_t *)d) = color;
d += ds->linesize;
}
break;
case 2:
for (y = posy1; y <= posy2; y++) {
*((uint16_t *)d) = color;
d += ds->linesize;
}
break;
case 4:
for (y = posy1; y <= posy2; y++) {
*((uint32_t *)d) = color;
d += ds->linesize;
}
break;
}
}
static void jazz_led_update_display(void *opaque)
{
LedState *s = opaque;
DisplayState *ds = s->ds;
uint8_t *d1;
uint32_t color_segment, color_led;
int y, bpp;
if (s->state & REDRAW_BACKGROUND) {
/* clear screen */
bpp = (ds->depth + 7) >> 3;
d1 = ds->data;
for (y = 0; y < ds->height; y++) {
memset(d1, 0x00, ds->width * bpp);
d1 += ds->linesize;
}
}
if (s->state & REDRAW_SEGMENTS) {
/* set colors according to bpp */
switch (ds->depth) {
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);
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(ds, 40, 10, 40, (s->segments & 0x02) ? color_segment : 0);
draw_vertical_line(ds, 10, 10, 40, (s->segments & 0x04) ? color_segment : 0);
draw_vertical_line(ds, 10, 40, 70, (s->segments & 0x08) ? color_segment : 0);
draw_horizontal_line(ds, 70, 10, 40, (s->segments & 0x10) ? color_segment : 0);
draw_vertical_line(ds, 40, 40, 70, (s->segments & 0x20) ? color_segment : 0);
draw_vertical_line(ds, 40, 10, 40, (s->segments & 0x40) ? color_segment : 0);
draw_horizontal_line(ds, 10, 10, 40, (s->segments & 0x80) ? color_segment : 0);
/* display led */
if (!(s->segments & 0x01))
color_led = 0; /* black */
draw_horizontal_line(ds, 68, 50, 50, color_led);
draw_horizontal_line(ds, 69, 49, 51, color_led);
draw_horizontal_line(ds, 70, 48, 52, color_led);
draw_horizontal_line(ds, 71, 49, 51, color_led);
draw_horizontal_line(ds, 72, 50, 50, color_led);
}
s->state = REDRAW_NONE;
dpy_update(ds, 0, 0, ds->width, ds->height);
}
static void jazz_led_invalidate_display(void *opaque)
{
LedState *s = opaque;
s->state |= REDRAW_SEGMENTS | REDRAW_BACKGROUND;
}
static void jazz_led_screen_dump(void *opaque, const char *filename)
{
printf("jazz_led_screen_dump() not implemented\n");
}
static void jazz_led_text_update(void *opaque, console_ch_t *chardata)
{
LedState *s = opaque;
char buf[2];
dpy_cursor(s->ds, -1, -1);
dpy_resize(s->ds, 2, 1);
/* TODO: draw the segments */
snprintf(buf, 2, "%02hhx\n", s->segments);
console_write_ch(chardata++, 0x00200100 | buf[0]);
console_write_ch(chardata++, 0x00200100 | buf[1]);
dpy_update(s->ds, 0, 0, 2, 1);
}
void jazz_led_init(DisplayState *ds, target_phys_addr_t base)
{
LedState *s;
int io;
s = qemu_mallocz(sizeof(LedState));
if (!s)
return;
s->base = base;
s->ds = ds;
s->state = REDRAW_SEGMENTS | REDRAW_BACKGROUND;
io = cpu_register_io_memory(0, led_read, led_write, s);
cpu_register_physical_memory(s->base, 1, io);
graphic_console_init(ds, jazz_led_update_display,
jazz_led_invalidate_display, jazz_led_screen_dump,
jazz_led_text_update, s);
}
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