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qemu-patch-raspberry4/hw/display/bcm2835_fb.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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/*
* Raspberry Pi emulation (c) 2012 Gregory Estrade
* Refactoring for Pi2 Copyright (c) 2015, Microsoft. Written by Andrew Baumann.
*
* Heavily based on milkymist-vgafb.c, copyright terms below:
* QEMU model of the Milkymist VGA framebuffer.
*
* Copyright (c) 2010-2012 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 2.1 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/>.
*
*/
#include "qemu/osdep.h"
#include "qapi/error.h"
#include "hw/display/bcm2835_fb.h"
#include "hw/hw.h"
#include "hw/irq.h"
#include "framebuffer.h"
#include "ui/pixel_ops.h"
#include "hw/misc/bcm2835_mbox_defs.h"
#include "hw/qdev-properties.h"
#include "migration/vmstate.h"
#include "qemu/log.h"
#include "qemu/module.h"
#define DEFAULT_VCRAM_SIZE 0x4000000
#define BCM2835_FB_OFFSET 0x00100000
/* Maximum permitted framebuffer size; experimentally determined on an rpi2 */
#define XRES_MAX 3840
#define YRES_MAX 2560
/* Framebuffer size used if guest requests zero size */
#define XRES_SMALL 592
#define YRES_SMALL 488
static void fb_invalidate_display(void *opaque)
{
BCM2835FBState *s = BCM2835_FB(opaque);
s->invalidate = true;
}
static void draw_line_src16(void *opaque, uint8_t *dst, const uint8_t *src,
int width, int deststep)
{
BCM2835FBState *s = opaque;
uint16_t rgb565;
uint32_t rgb888;
uint8_t r, g, b;
DisplaySurface *surface = qemu_console_surface(s->con);
int bpp = surface_bits_per_pixel(surface);
while (width--) {
switch (s->config.bpp) {
case 8:
/* lookup palette starting at video ram base
* TODO: cache translation, rather than doing this each time!
*/
rgb888 = ldl_le_phys(&s->dma_as, s->vcram_base + (*src << 2));
r = (rgb888 >> 0) & 0xff;
g = (rgb888 >> 8) & 0xff;
b = (rgb888 >> 16) & 0xff;
src++;
break;
case 16:
rgb565 = lduw_le_p(src);
r = ((rgb565 >> 11) & 0x1f) << 3;
g = ((rgb565 >> 5) & 0x3f) << 2;
b = ((rgb565 >> 0) & 0x1f) << 3;
src += 2;
break;
case 24:
rgb888 = ldl_le_p(src);
r = (rgb888 >> 0) & 0xff;
g = (rgb888 >> 8) & 0xff;
b = (rgb888 >> 16) & 0xff;
src += 3;
break;
case 32:
rgb888 = ldl_le_p(src);
r = (rgb888 >> 0) & 0xff;
g = (rgb888 >> 8) & 0xff;
b = (rgb888 >> 16) & 0xff;
src += 4;
break;
default:
r = 0;
g = 0;
b = 0;
break;
}
if (s->config.pixo == 0) {
/* swap to BGR pixel format */
uint8_t tmp = r;
r = b;
b = tmp;
}
switch (bpp) {
case 8:
*dst++ = rgb_to_pixel8(r, g, b);
break;
case 15:
*(uint16_t *)dst = rgb_to_pixel15(r, g, b);
dst += 2;
break;
case 16:
*(uint16_t *)dst = rgb_to_pixel16(r, g, b);
dst += 2;
break;
case 24:
rgb888 = rgb_to_pixel24(r, g, b);
*dst++ = rgb888 & 0xff;
*dst++ = (rgb888 >> 8) & 0xff;
*dst++ = (rgb888 >> 16) & 0xff;
break;
case 32:
*(uint32_t *)dst = rgb_to_pixel32(r, g, b);
dst += 4;
break;
default:
return;
}
}
}
static bool fb_use_offsets(BCM2835FBConfig *config)
{
/*
* Return true if we should use the viewport offsets.
* Experimentally, the hardware seems to do this only if the
* viewport size is larger than the physical screen. (It doesn't
* prevent the guest setting this silly viewport setting, though...)
*/
return config->xres_virtual > config->xres &&
config->yres_virtual > config->yres;
}
static void fb_update_display(void *opaque)
{
BCM2835FBState *s = opaque;
DisplaySurface *surface = qemu_console_surface(s->con);
int first = 0;
int last = 0;
int src_width = 0;
int dest_width = 0;
uint32_t xoff = 0, yoff = 0;
if (s->lock || !s->config.xres) {
return;
}
src_width = bcm2835_fb_get_pitch(&s->config);
if (fb_use_offsets(&s->config)) {
xoff = s->config.xoffset;
yoff = s->config.yoffset;
}
dest_width = s->config.xres;
switch (surface_bits_per_pixel(surface)) {
case 0:
return;
case 8:
break;
case 15:
dest_width *= 2;
break;
case 16:
dest_width *= 2;
break;
case 24:
dest_width *= 3;
break;
case 32:
dest_width *= 4;
break;
default:
hw_error("bcm2835_fb: bad color depth\n");
break;
}
if (s->invalidate) {
hwaddr base = s->config.base + xoff + (hwaddr)yoff * src_width;
framebuffer_update_memory_section(&s->fbsection, s->dma_mr,
base,
s->config.yres, src_width);
}
framebuffer_update_display(surface, &s->fbsection,
s->config.xres, s->config.yres,
src_width, dest_width, 0, s->invalidate,
draw_line_src16, s, &first, &last);
if (first >= 0) {
dpy_gfx_update(s->con, 0, first, s->config.xres,
last - first + 1);
}
s->invalidate = false;
}
void bcm2835_fb_validate_config(BCM2835FBConfig *config)
{
/*
* Validate the config, and clip any bogus values into range,
* as the hardware does. Note that fb_update_display() relies on
* this happening to prevent it from performing out-of-range
* accesses on redraw.
*/
config->xres = MIN(config->xres, XRES_MAX);
config->xres_virtual = MIN(config->xres_virtual, XRES_MAX);
config->yres = MIN(config->yres, YRES_MAX);
config->yres_virtual = MIN(config->yres_virtual, YRES_MAX);
/*
* These are not minima: a 40x40 framebuffer will be accepted.
* They're only used as defaults if the guest asks for zero size.
*/
if (config->xres == 0) {
config->xres = XRES_SMALL;
}
if (config->yres == 0) {
config->yres = YRES_SMALL;
}
if (config->xres_virtual == 0) {
config->xres_virtual = config->xres;
}
if (config->yres_virtual == 0) {
config->yres_virtual = config->yres;
}
if (fb_use_offsets(config)) {
/* Clip the offsets so the viewport is within the physical screen */
config->xoffset = MIN(config->xoffset,
config->xres_virtual - config->xres);
config->yoffset = MIN(config->yoffset,
config->yres_virtual - config->yres);
}
}
void bcm2835_fb_reconfigure(BCM2835FBState *s, BCM2835FBConfig *newconfig)
{
s->lock = true;
s->config = *newconfig;
s->invalidate = true;
qemu_console_resize(s->con, s->config.xres, s->config.yres);
s->lock = false;
}
static void bcm2835_fb_mbox_push(BCM2835FBState *s, uint32_t value)
{
uint32_t pitch;
uint32_t size;
BCM2835FBConfig newconf;
value &= ~0xf;
newconf.xres = ldl_le_phys(&s->dma_as, value);
newconf.yres = ldl_le_phys(&s->dma_as, value + 4);
newconf.xres_virtual = ldl_le_phys(&s->dma_as, value + 8);
newconf.yres_virtual = ldl_le_phys(&s->dma_as, value + 12);
newconf.bpp = ldl_le_phys(&s->dma_as, value + 20);
newconf.xoffset = ldl_le_phys(&s->dma_as, value + 24);
newconf.yoffset = ldl_le_phys(&s->dma_as, value + 28);
newconf.base = s->vcram_base | (value & 0xc0000000);
newconf.base += BCM2835_FB_OFFSET;
/* Copy fields which we don't want to change from the existing config */
newconf.pixo = s->config.pixo;
newconf.alpha = s->config.alpha;
bcm2835_fb_validate_config(&newconf);
pitch = bcm2835_fb_get_pitch(&newconf);
size = bcm2835_fb_get_size(&newconf);
stl_le_phys(&s->dma_as, value + 16, pitch);
stl_le_phys(&s->dma_as, value + 32, newconf.base);
stl_le_phys(&s->dma_as, value + 36, size);
bcm2835_fb_reconfigure(s, &newconf);
}
static uint64_t bcm2835_fb_read(void *opaque, hwaddr offset, unsigned size)
{
BCM2835FBState *s = opaque;
uint32_t res = 0;
switch (offset) {
case MBOX_AS_DATA:
res = MBOX_CHAN_FB;
s->pending = false;
qemu_set_irq(s->mbox_irq, 0);
break;
case MBOX_AS_PENDING:
res = s->pending;
break;
default:
qemu_log_mask(LOG_GUEST_ERROR, "%s: Bad offset %"HWADDR_PRIx"\n",
__func__, offset);
return 0;
}
return res;
}
static void bcm2835_fb_write(void *opaque, hwaddr offset, uint64_t value,
unsigned size)
{
BCM2835FBState *s = opaque;
switch (offset) {
case MBOX_AS_DATA:
/* bcm2835_mbox should check our pending status before pushing */
assert(!s->pending);
s->pending = true;
bcm2835_fb_mbox_push(s, value);
qemu_set_irq(s->mbox_irq, 1);
break;
default:
qemu_log_mask(LOG_GUEST_ERROR, "%s: Bad offset %"HWADDR_PRIx"\n",
__func__, offset);
return;
}
}
static const MemoryRegionOps bcm2835_fb_ops = {
.read = bcm2835_fb_read,
.write = bcm2835_fb_write,
.endianness = DEVICE_NATIVE_ENDIAN,
.valid.min_access_size = 4,
.valid.max_access_size = 4,
};
static const VMStateDescription vmstate_bcm2835_fb = {
.name = TYPE_BCM2835_FB,
.version_id = 1,
.minimum_version_id = 1,
.fields = (VMStateField[]) {
VMSTATE_BOOL(lock, BCM2835FBState),
VMSTATE_BOOL(invalidate, BCM2835FBState),
VMSTATE_BOOL(pending, BCM2835FBState),
VMSTATE_UINT32(config.xres, BCM2835FBState),
VMSTATE_UINT32(config.yres, BCM2835FBState),
VMSTATE_UINT32(config.xres_virtual, BCM2835FBState),
VMSTATE_UINT32(config.yres_virtual, BCM2835FBState),
VMSTATE_UINT32(config.xoffset, BCM2835FBState),
VMSTATE_UINT32(config.yoffset, BCM2835FBState),
VMSTATE_UINT32(config.bpp, BCM2835FBState),
VMSTATE_UINT32(config.base, BCM2835FBState),
VMSTATE_UNUSED(8), /* Was pitch and size */
VMSTATE_UINT32(config.pixo, BCM2835FBState),
VMSTATE_UINT32(config.alpha, BCM2835FBState),
VMSTATE_END_OF_LIST()
}
};
static const GraphicHwOps vgafb_ops = {
.invalidate = fb_invalidate_display,
.gfx_update = fb_update_display,
};
static void bcm2835_fb_init(Object *obj)
{
BCM2835FBState *s = BCM2835_FB(obj);
memory_region_init_io(&s->iomem, obj, &bcm2835_fb_ops, s, TYPE_BCM2835_FB,
0x10);
sysbus_init_mmio(SYS_BUS_DEVICE(s), &s->iomem);
sysbus_init_irq(SYS_BUS_DEVICE(s), &s->mbox_irq);
}
static void bcm2835_fb_reset(DeviceState *dev)
{
BCM2835FBState *s = BCM2835_FB(dev);
s->pending = false;
s->config = s->initial_config;
s->invalidate = true;
s->lock = false;
}
static void bcm2835_fb_realize(DeviceState *dev, Error **errp)
{
BCM2835FBState *s = BCM2835_FB(dev);
Object *obj;
if (s->vcram_base == 0) {
error_setg(errp, "%s: required vcram-base property not set", __func__);
return;
}
obj = object_property_get_link(OBJECT(dev), "dma-mr", &error_abort);
/* Fill in the parts of initial_config that are not set by QOM properties */
s->initial_config.xres_virtual = s->initial_config.xres;
s->initial_config.yres_virtual = s->initial_config.yres;
s->initial_config.xoffset = 0;
s->initial_config.yoffset = 0;
s->initial_config.base = s->vcram_base + BCM2835_FB_OFFSET;
s->dma_mr = MEMORY_REGION(obj);
address_space_init(&s->dma_as, s->dma_mr, TYPE_BCM2835_FB "-memory");
bcm2835_fb_reset(dev);
s->con = graphic_console_init(dev, 0, &vgafb_ops, s);
qemu_console_resize(s->con, s->config.xres, s->config.yres);
}
static Property bcm2835_fb_props[] = {
DEFINE_PROP_UINT32("vcram-base", BCM2835FBState, vcram_base, 0),/*required*/
DEFINE_PROP_UINT32("vcram-size", BCM2835FBState, vcram_size,
DEFAULT_VCRAM_SIZE),
DEFINE_PROP_UINT32("xres", BCM2835FBState, initial_config.xres, 640),
DEFINE_PROP_UINT32("yres", BCM2835FBState, initial_config.yres, 480),
DEFINE_PROP_UINT32("bpp", BCM2835FBState, initial_config.bpp, 16),
DEFINE_PROP_UINT32("pixo", BCM2835FBState,
initial_config.pixo, 1), /* 1=RGB, 0=BGR */
DEFINE_PROP_UINT32("alpha", BCM2835FBState,
initial_config.alpha, 2), /* alpha ignored */
DEFINE_PROP_END_OF_LIST()
};
static void bcm2835_fb_class_init(ObjectClass *klass, void *data)
{
DeviceClass *dc = DEVICE_CLASS(klass);
device_class_set_props(dc, bcm2835_fb_props);
dc->realize = bcm2835_fb_realize;
dc->reset = bcm2835_fb_reset;
dc->vmsd = &vmstate_bcm2835_fb;
}
static TypeInfo bcm2835_fb_info = {
.name = TYPE_BCM2835_FB,
.parent = TYPE_SYS_BUS_DEVICE,
.instance_size = sizeof(BCM2835FBState),
.class_init = bcm2835_fb_class_init,
.instance_init = bcm2835_fb_init,
};
static void bcm2835_fb_register_types(void)
{
type_register_static(&bcm2835_fb_info);
}
type_init(bcm2835_fb_register_types)
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