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qemu/hw/display/milkymist-tmu2.c
Chetan Pant 61f3c91a67 nomaintainer: Fix Lesser GPL version number 
There is no "version 2" of the "Lesser" General Public License.
It is either "GPL version 2.0" or "Lesser GPL version 2.1".
This patch replaces all occurrences of "Lesser GPL version 2" with
"Lesser GPL version 2.1" in comment section.

This patch contains all the files, whose maintainer I could not get
from ‘get_maintainer.pl’ script.

Signed-off-by: Chetan Pant <chetan4windows@gmail.com>
Message-Id: <20201023124424.20177-1-chetan4windows@gmail.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
[thuth: Adapted exec.c and qdev-monitor.c to new location]
Signed-off-by: Thomas Huth <thuth@redhat.com>
2020-11-15 17:04:40 +01:00

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/*
* QEMU model of the Milkymist texture mapping unit.
*
* Copyright (c) 2010 Michael Walle <michael@walle.cc>
* Copyright (c) 2010 Sebastien Bourdeauducq
* <sebastien.bourdeauducq@lekernel.net>
*
* 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 2.1 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/>.
*
*
* Specification available at:
* http://milkymist.walle.cc/socdoc/tmu2.pdf
*
*/
#include "qemu/osdep.h"
#include "hw/irq.h"
#include "hw/sysbus.h"
#include "migration/vmstate.h"
#include "trace.h"
#include "qapi/error.h"
#include "qemu/error-report.h"
#include "qemu/module.h"
#include "qapi/error.h"
#include "hw/display/milkymist_tmu2.h"
#include <X11/Xlib.h>
#include <epoxy/gl.h>
#include <epoxy/glx.h>
#include "qom/object.h"
enum {
R_CTL = 0,
R_HMESHLAST,
R_VMESHLAST,
R_BRIGHTNESS,
R_CHROMAKEY,
R_VERTICESADDR,
R_TEXFBUF,
R_TEXHRES,
R_TEXVRES,
R_TEXHMASK,
R_TEXVMASK,
R_DSTFBUF,
R_DSTHRES,
R_DSTVRES,
R_DSTHOFFSET,
R_DSTVOFFSET,
R_DSTSQUAREW,
R_DSTSQUAREH,
R_ALPHA,
R_MAX
};
enum {
CTL_START_BUSY = (1<<0),
CTL_CHROMAKEY = (1<<1),
};
enum {
MAX_BRIGHTNESS = 63,
MAX_ALPHA = 63,
};
enum {
MESH_MAXSIZE = 128,
};
struct vertex {
int x;
int y;
} QEMU_PACKED;
#define TYPE_MILKYMIST_TMU2 "milkymist-tmu2"
OBJECT_DECLARE_SIMPLE_TYPE(MilkymistTMU2State, MILKYMIST_TMU2)
struct MilkymistTMU2State {
SysBusDevice parent_obj;
MemoryRegion regs_region;
Chardev *chr;
qemu_irq irq;
uint32_t regs[R_MAX];
Display *dpy;
GLXFBConfig glx_fb_config;
GLXContext glx_context;
};
static const int glx_fbconfig_attr[] = {
GLX_GREEN_SIZE, 5,
GLX_GREEN_SIZE, 6,
GLX_BLUE_SIZE, 5,
None
};
static int tmu2_glx_init(MilkymistTMU2State *s)
{
GLXFBConfig *configs;
int nelements;
s->dpy = XOpenDisplay(NULL); /* FIXME: call XCloseDisplay() */
if (s->dpy == NULL) {
return 1;
}
configs = glXChooseFBConfig(s->dpy, 0, glx_fbconfig_attr, &nelements);
if (configs == NULL) {
return 1;
}
s->glx_fb_config = *configs;
XFree(configs);
/* FIXME: call glXDestroyContext() */
s->glx_context = glXCreateNewContext(s->dpy, s->glx_fb_config,
GLX_RGBA_TYPE, NULL, 1);
if (s->glx_context == NULL) {
return 1;
}
return 0;
}
static void tmu2_gl_map(struct vertex *mesh, int texhres, int texvres,
int hmeshlast, int vmeshlast, int ho, int vo, int sw, int sh)
{
int x, y;
int x0, y0, x1, y1;
int u0, v0, u1, v1, u2, v2, u3, v3;
double xscale = 1.0 / ((double)(64 * texhres));
double yscale = 1.0 / ((double)(64 * texvres));
glLoadIdentity();
glTranslatef(ho, vo, 0);
glEnable(GL_TEXTURE_2D);
glBegin(GL_QUADS);
for (y = 0; y < vmeshlast; y++) {
y0 = y * sh;
y1 = y0 + sh;
for (x = 0; x < hmeshlast; x++) {
x0 = x * sw;
x1 = x0 + sw;
u0 = be32_to_cpu(mesh[MESH_MAXSIZE * y + x].x);
v0 = be32_to_cpu(mesh[MESH_MAXSIZE * y + x].y);
u1 = be32_to_cpu(mesh[MESH_MAXSIZE * y + x + 1].x);
v1 = be32_to_cpu(mesh[MESH_MAXSIZE * y + x + 1].y);
u2 = be32_to_cpu(mesh[MESH_MAXSIZE * (y + 1) + x + 1].x);
v2 = be32_to_cpu(mesh[MESH_MAXSIZE * (y + 1) + x + 1].y);
u3 = be32_to_cpu(mesh[MESH_MAXSIZE * (y + 1) + x].x);
v3 = be32_to_cpu(mesh[MESH_MAXSIZE * (y + 1) + x].y);
glTexCoord2d(((double)u0) * xscale, ((double)v0) * yscale);
glVertex3i(x0, y0, 0);
glTexCoord2d(((double)u1) * xscale, ((double)v1) * yscale);
glVertex3i(x1, y0, 0);
glTexCoord2d(((double)u2) * xscale, ((double)v2) * yscale);
glVertex3i(x1, y1, 0);
glTexCoord2d(((double)u3) * xscale, ((double)v3) * yscale);
glVertex3i(x0, y1, 0);
}
}
glEnd();
}
static void tmu2_start(MilkymistTMU2State *s)
{
int pbuffer_attrib[6] = {
GLX_PBUFFER_WIDTH,
0,
GLX_PBUFFER_HEIGHT,
0,
GLX_PRESERVED_CONTENTS,
True
};
GLXPbuffer pbuffer;
GLuint texture;
void *fb;
hwaddr fb_len;
void *mesh;
hwaddr mesh_len;
float m;
trace_milkymist_tmu2_start();
/* Create and set up a suitable OpenGL context */
pbuffer_attrib[1] = s->regs[R_DSTHRES];
pbuffer_attrib[3] = s->regs[R_DSTVRES];
pbuffer = glXCreatePbuffer(s->dpy, s->glx_fb_config, pbuffer_attrib);
glXMakeContextCurrent(s->dpy, pbuffer, pbuffer, s->glx_context);
/* Fixup endianness. TODO: would it work on BE hosts? */
glPixelStorei(GL_UNPACK_SWAP_BYTES, 1);
glPixelStorei(GL_PACK_SWAP_BYTES, 1);
/* Row alignment */
glPixelStorei(GL_UNPACK_ALIGNMENT, 2);
glPixelStorei(GL_PACK_ALIGNMENT, 2);
/* Read the QEMU source framebuffer into an OpenGL texture */
glGenTextures(1, &texture);
glBindTexture(GL_TEXTURE_2D, texture);
fb_len = 2ULL * s->regs[R_TEXHRES] * s->regs[R_TEXVRES];
fb = cpu_physical_memory_map(s->regs[R_TEXFBUF], &fb_len, false);
if (fb == NULL) {
glDeleteTextures(1, &texture);
glXMakeContextCurrent(s->dpy, None, None, NULL);
glXDestroyPbuffer(s->dpy, pbuffer);
return;
}
glTexImage2D(GL_TEXTURE_2D, 0, 3, s->regs[R_TEXHRES], s->regs[R_TEXVRES],
0, GL_RGB, GL_UNSIGNED_SHORT_5_6_5, fb);
cpu_physical_memory_unmap(fb, fb_len, 0, fb_len);
/* Set up texturing options */
/* WARNING:
* Many cases of TMU2 masking are not supported by OpenGL.
* We only implement the most common ones:
* - full bilinear filtering vs. nearest texel
* - texture clamping vs. texture wrapping
*/
if ((s->regs[R_TEXHMASK] & 0x3f) > 0x20) {
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
} else {
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
}
if ((s->regs[R_TEXHMASK] >> 6) & s->regs[R_TEXHRES]) {
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP);
} else {
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
}
if ((s->regs[R_TEXVMASK] >> 6) & s->regs[R_TEXVRES]) {
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP);
} else {
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
}
/* Translucency and decay */
glEnable(GL_BLEND);
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
m = (float)(s->regs[R_BRIGHTNESS] + 1) / 64.0f;
glColor4f(m, m, m, (float)(s->regs[R_ALPHA] + 1) / 64.0f);
/* Read the QEMU dest. framebuffer into the OpenGL framebuffer */
fb_len = 2ULL * s->regs[R_DSTHRES] * s->regs[R_DSTVRES];
fb = cpu_physical_memory_map(s->regs[R_DSTFBUF], &fb_len, false);
if (fb == NULL) {
glDeleteTextures(1, &texture);
glXMakeContextCurrent(s->dpy, None, None, NULL);
glXDestroyPbuffer(s->dpy, pbuffer);
return;
}
glDrawPixels(s->regs[R_DSTHRES], s->regs[R_DSTVRES], GL_RGB,
GL_UNSIGNED_SHORT_5_6_5, fb);
cpu_physical_memory_unmap(fb, fb_len, 0, fb_len);
glViewport(0, 0, s->regs[R_DSTHRES], s->regs[R_DSTVRES]);
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
glOrtho(0.0, s->regs[R_DSTHRES], 0.0, s->regs[R_DSTVRES], -1.0, 1.0);
glMatrixMode(GL_MODELVIEW);
/* Map the texture */
mesh_len = MESH_MAXSIZE*MESH_MAXSIZE*sizeof(struct vertex);
mesh = cpu_physical_memory_map(s->regs[R_VERTICESADDR], &mesh_len, false);
if (mesh == NULL) {
glDeleteTextures(1, &texture);
glXMakeContextCurrent(s->dpy, None, None, NULL);
glXDestroyPbuffer(s->dpy, pbuffer);
return;
}
tmu2_gl_map((struct vertex *)mesh,
s->regs[R_TEXHRES], s->regs[R_TEXVRES],
s->regs[R_HMESHLAST], s->regs[R_VMESHLAST],
s->regs[R_DSTHOFFSET], s->regs[R_DSTVOFFSET],
s->regs[R_DSTSQUAREW], s->regs[R_DSTSQUAREH]);
cpu_physical_memory_unmap(mesh, mesh_len, 0, mesh_len);
/* Write back the OpenGL framebuffer to the QEMU framebuffer */
fb_len = 2ULL * s->regs[R_DSTHRES] * s->regs[R_DSTVRES];
fb = cpu_physical_memory_map(s->regs[R_DSTFBUF], &fb_len, true);
if (fb == NULL) {
glDeleteTextures(1, &texture);
glXMakeContextCurrent(s->dpy, None, None, NULL);
glXDestroyPbuffer(s->dpy, pbuffer);
return;
}
glReadPixels(0, 0, s->regs[R_DSTHRES], s->regs[R_DSTVRES], GL_RGB,
GL_UNSIGNED_SHORT_5_6_5, fb);
cpu_physical_memory_unmap(fb, fb_len, 1, fb_len);
/* Free OpenGL allocs */
glDeleteTextures(1, &texture);
glXMakeContextCurrent(s->dpy, None, None, NULL);
glXDestroyPbuffer(s->dpy, pbuffer);
s->regs[R_CTL] &= ~CTL_START_BUSY;
trace_milkymist_tmu2_pulse_irq();
qemu_irq_pulse(s->irq);
}
static uint64_t tmu2_read(void *opaque, hwaddr addr,
unsigned size)
{
MilkymistTMU2State *s = opaque;
uint32_t r = 0;
addr >>= 2;
switch (addr) {
case R_CTL:
case R_HMESHLAST:
case R_VMESHLAST:
case R_BRIGHTNESS:
case R_CHROMAKEY:
case R_VERTICESADDR:
case R_TEXFBUF:
case R_TEXHRES:
case R_TEXVRES:
case R_TEXHMASK:
case R_TEXVMASK:
case R_DSTFBUF:
case R_DSTHRES:
case R_DSTVRES:
case R_DSTHOFFSET:
case R_DSTVOFFSET:
case R_DSTSQUAREW:
case R_DSTSQUAREH:
case R_ALPHA:
r = s->regs[addr];
break;
default:
error_report("milkymist_tmu2: read access to unknown register 0x"
TARGET_FMT_plx, addr << 2);
break;
}
trace_milkymist_tmu2_memory_read(addr << 2, r);
return r;
}
static void tmu2_check_registers(MilkymistTMU2State *s)
{
if (s->regs[R_BRIGHTNESS] > MAX_BRIGHTNESS) {
error_report("milkymist_tmu2: max brightness is %d", MAX_BRIGHTNESS);
}
if (s->regs[R_ALPHA] > MAX_ALPHA) {
error_report("milkymist_tmu2: max alpha is %d", MAX_ALPHA);
}
if (s->regs[R_VERTICESADDR] & 0x07) {
error_report("milkymist_tmu2: vertex mesh address has to be 64-bit "
"aligned");
}
if (s->regs[R_TEXFBUF] & 0x01) {
error_report("milkymist_tmu2: texture buffer address has to be "
"16-bit aligned");
}
}
static void tmu2_write(void *opaque, hwaddr addr, uint64_t value,
unsigned size)
{
MilkymistTMU2State *s = opaque;
trace_milkymist_tmu2_memory_write(addr, value);
addr >>= 2;
switch (addr) {
case R_CTL:
s->regs[addr] = value;
if (value & CTL_START_BUSY) {
tmu2_start(s);
}
break;
case R_BRIGHTNESS:
case R_HMESHLAST:
case R_VMESHLAST:
case R_CHROMAKEY:
case R_VERTICESADDR:
case R_TEXFBUF:
case R_TEXHRES:
case R_TEXVRES:
case R_TEXHMASK:
case R_TEXVMASK:
case R_DSTFBUF:
case R_DSTHRES:
case R_DSTVRES:
case R_DSTHOFFSET:
case R_DSTVOFFSET:
case R_DSTSQUAREW:
case R_DSTSQUAREH:
case R_ALPHA:
s->regs[addr] = value;
break;
default:
error_report("milkymist_tmu2: write access to unknown register 0x"
TARGET_FMT_plx, addr << 2);
break;
}
tmu2_check_registers(s);
}
static const MemoryRegionOps tmu2_mmio_ops = {
.read = tmu2_read,
.write = tmu2_write,
.valid = {
.min_access_size = 4,
.max_access_size = 4,
},
.endianness = DEVICE_NATIVE_ENDIAN,
};
static void milkymist_tmu2_reset(DeviceState *d)
{
MilkymistTMU2State *s = MILKYMIST_TMU2(d);
int i;
for (i = 0; i < R_MAX; i++) {
s->regs[i] = 0;
}
}
static void milkymist_tmu2_init(Object *obj)
{
MilkymistTMU2State *s = MILKYMIST_TMU2(obj);
SysBusDevice *dev = SYS_BUS_DEVICE(obj);
sysbus_init_irq(dev, &s->irq);
memory_region_init_io(&s->regs_region, obj, &tmu2_mmio_ops, s,
"milkymist-tmu2", R_MAX * 4);
sysbus_init_mmio(dev, &s->regs_region);
}
static void milkymist_tmu2_realize(DeviceState *dev, Error **errp)
{
MilkymistTMU2State *s = MILKYMIST_TMU2(dev);
if (tmu2_glx_init(s)) {
error_setg(errp, "tmu2_glx_init failed");
}
}
static const VMStateDescription vmstate_milkymist_tmu2 = {
.name = "milkymist-tmu2",
.version_id = 1,
.minimum_version_id = 1,
.fields = (VMStateField[]) {
VMSTATE_UINT32_ARRAY(regs, MilkymistTMU2State, R_MAX),
VMSTATE_END_OF_LIST()
}
};
static void milkymist_tmu2_class_init(ObjectClass *klass, void *data)
{
DeviceClass *dc = DEVICE_CLASS(klass);
dc->realize = milkymist_tmu2_realize;
dc->reset = milkymist_tmu2_reset;
dc->vmsd = &vmstate_milkymist_tmu2;
}
static const TypeInfo milkymist_tmu2_info = {
.name = TYPE_MILKYMIST_TMU2,
.parent = TYPE_SYS_BUS_DEVICE,
.instance_size = sizeof(MilkymistTMU2State),
.instance_init = milkymist_tmu2_init,
.class_init = milkymist_tmu2_class_init,
};
static void milkymist_tmu2_register_types(void)
{
type_register_static(&milkymist_tmu2_info);
}
type_init(milkymist_tmu2_register_types)
DeviceState *milkymist_tmu2_create(hwaddr base, qemu_irq irq)
{
DeviceState *dev;
Display *d;
GLXFBConfig *configs;
int nelements;
int ver_major, ver_minor;
/* check that GLX will work */
d = XOpenDisplay(NULL);
if (d == NULL) {
return NULL;
}
if (!glXQueryVersion(d, &ver_major, &ver_minor)) {
/*
* Yeah, sometimes getting the GLX version can fail.
* Isn't X beautiful?
*/
XCloseDisplay(d);
return NULL;
}
if ((ver_major < 1) || ((ver_major == 1) && (ver_minor < 3))) {
printf("Your GLX version is %d.%d,"
"but TMU emulation needs at least 1.3. TMU disabled.\n",
ver_major, ver_minor);
XCloseDisplay(d);
return NULL;
}
configs = glXChooseFBConfig(d, 0, glx_fbconfig_attr, &nelements);
if (configs == NULL) {
XCloseDisplay(d);
return NULL;
}
XFree(configs);
XCloseDisplay(d);
dev = qdev_new(TYPE_MILKYMIST_TMU2);
sysbus_realize_and_unref(SYS_BUS_DEVICE(dev), &error_fatal);
sysbus_mmio_map(SYS_BUS_DEVICE(dev), 0, base);
sysbus_connect_irq(SYS_BUS_DEVICE(dev), 0, irq);
return dev;
}
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