bcm2835_fb: add framebuffer device for Raspberry Pi
The framebuffer occupies the upper portion of memory (64MiB by default), but it can only be controlled/configured via a system mailbox or property channel (to be added by a subsequent patch). Signed-off-by: Grégory ESTRADE <gregory.estrade@gmail.com> Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Andrew Baumann <Andrew.Baumann@microsoft.com> Message-id: 1457467526-8840-4-git-send-email-Andrew.Baumann@microsoft.com [AB: added Windows (BGR) support and cleanup/refactoring for upstream submission] Signed-off-by: Andrew Baumann <Andrew.Baumann@microsoft.com> Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Grégory ESTRADE
Peter Maydell
parent
97398d900c
commit
5e9c2a8dac
@ -62,6 +62,16 @@ static void bcm2835_peripherals_init(Object *obj)
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object_property_add_const_link(OBJECT(&s->mboxes), "mbox-mr",
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OBJECT(&s->mbox_mr), &error_abort);
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/* Framebuffer */
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object_initialize(&s->fb, sizeof(s->fb), TYPE_BCM2835_FB);
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object_property_add_child(obj, "fb", OBJECT(&s->fb), NULL);
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object_property_add_alias(obj, "vcram-size", OBJECT(&s->fb), "vcram-size",
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&error_abort);
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qdev_set_parent_bus(DEVICE(&s->fb), sysbus_get_default());
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object_property_add_const_link(OBJECT(&s->fb), "dma-mr",
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OBJECT(&s->gpu_bus_mr), &error_abort);
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/* Property channel */
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object_initialize(&s->property, sizeof(s->property), TYPE_BCM2835_PROPERTY);
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object_property_add_child(obj, "property", OBJECT(&s->property), NULL);
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@ -84,7 +94,7 @@ static void bcm2835_peripherals_realize(DeviceState *dev, Error **errp)
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Object *obj;
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MemoryRegion *ram;
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Error *err = NULL;
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uint32_t ram_size;
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uint32_t ram_size, vcram_size;
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CharDriverState *chr;
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int n;
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@ -174,6 +184,32 @@ static void bcm2835_peripherals_realize(DeviceState *dev, Error **errp)
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qdev_get_gpio_in_named(DEVICE(&s->ic), BCM2835_IC_ARM_IRQ,
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INTERRUPT_ARM_MAILBOX));
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/* Framebuffer */
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vcram_size = (uint32_t)object_property_get_int(OBJECT(s), "vcram-size",
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&err);
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if (err) {
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error_propagate(errp, err);
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return;
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}
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object_property_set_int(OBJECT(&s->fb), ram_size - vcram_size,
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"vcram-base", &err);
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if (err) {
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error_propagate(errp, err);
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return;
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}
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object_property_set_bool(OBJECT(&s->fb), true, "realized", &err);
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if (err) {
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error_propagate(errp, err);
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return;
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}
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memory_region_add_subregion(&s->mbox_mr, MBOX_CHAN_FB << MBOX_AS_CHAN_SHIFT,
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sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->fb), 0));
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sysbus_connect_irq(SYS_BUS_DEVICE(&s->fb), 0,
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qdev_get_gpio_in(DEVICE(&s->mboxes), MBOX_CHAN_FB));
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/* Property channel */
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object_property_set_int(OBJECT(&s->property), ram_size, "ram-size", &err);
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if (err) {
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@ -42,6 +42,8 @@ static void bcm2836_init(Object *obj)
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&error_abort);
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object_property_add_alias(obj, "board-rev", OBJECT(&s->peripherals),
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"board-rev", &error_abort);
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object_property_add_alias(obj, "vcram-size", OBJECT(&s->peripherals),
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"vcram-size", &error_abort);
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qdev_set_parent_bus(DEVICE(&s->peripherals), sysbus_get_default());
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}
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@ -113,6 +113,7 @@ static void setup_boot(MachineState *machine, int version, size_t ram_size)
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static void raspi2_init(MachineState *machine)
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{
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RasPiState *s = g_new0(RasPiState, 1);
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uint32_t vcram_size;
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DriveInfo *di;
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BlockBackend *blk;
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BusState *bus;
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@ -149,7 +150,9 @@ static void raspi2_init(MachineState *machine)
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qdev_prop_set_drive(carddev, "drive", blk, &error_fatal);
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object_property_set_bool(OBJECT(carddev), true, "realized", &error_fatal);
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setup_boot(machine, 2, machine->ram_size);
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vcram_size = object_property_get_int(OBJECT(&s->soc), "vcram-size",
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&error_abort);
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setup_boot(machine, 2, machine->ram_size - vcram_size);
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}
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static void raspi2_machine_init(MachineClass *mc)
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@ -27,6 +27,7 @@ endif
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obj-$(CONFIG_OMAP) += omap_dss.o
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obj-$(CONFIG_OMAP) += omap_lcdc.o
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obj-$(CONFIG_PXA2XX) += pxa2xx_lcd.o
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obj-$(CONFIG_RASPI) += bcm2835_fb.o
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obj-$(CONFIG_SM501) += sm501.o
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obj-$(CONFIG_TCX) += tcx.o
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obj-$(CONFIG_CG3) += cg3.o
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424
hw/display/bcm2835_fb.c
Normal file
424
hw/display/bcm2835_fb.c
Normal file
@ -0,0 +1,424 @@
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/*
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* Raspberry Pi emulation (c) 2012 Gregory Estrade
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* Refactoring for Pi2 Copyright (c) 2015, Microsoft. Written by Andrew Baumann.
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* This code is licensed under the GNU GPLv2 and later.
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*
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* Heavily based on milkymist-vgafb.c, copyright terms below:
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* QEMU model of the Milkymist VGA framebuffer.
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*
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* Copyright (c) 2010-2012 Michael Walle <michael@walle.cc>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, see <http://www.gnu.org/licenses/>.
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*
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*/
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#include "qemu/osdep.h"
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#include "hw/display/bcm2835_fb.h"
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#include "hw/display/framebuffer.h"
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#include "ui/pixel_ops.h"
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#include "hw/misc/bcm2835_mbox_defs.h"
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#define DEFAULT_VCRAM_SIZE 0x4000000
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#define BCM2835_FB_OFFSET 0x00100000
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static void fb_invalidate_display(void *opaque)
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{
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BCM2835FBState *s = BCM2835_FB(opaque);
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s->invalidate = true;
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}
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static void draw_line_src16(void *opaque, uint8_t *dst, const uint8_t *src,
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int width, int deststep)
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{
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BCM2835FBState *s = opaque;
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uint16_t rgb565;
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uint32_t rgb888;
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uint8_t r, g, b;
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DisplaySurface *surface = qemu_console_surface(s->con);
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int bpp = surface_bits_per_pixel(surface);
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while (width--) {
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switch (s->bpp) {
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case 8:
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/* lookup palette starting at video ram base
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* TODO: cache translation, rather than doing this each time!
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*/
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rgb888 = ldl_le_phys(&s->dma_as, s->vcram_base + (*src << 2));
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r = (rgb888 >> 0) & 0xff;
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g = (rgb888 >> 8) & 0xff;
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b = (rgb888 >> 16) & 0xff;
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src++;
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break;
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case 16:
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rgb565 = lduw_le_p(src);
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r = ((rgb565 >> 11) & 0x1f) << 3;
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g = ((rgb565 >> 5) & 0x3f) << 2;
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b = ((rgb565 >> 0) & 0x1f) << 3;
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src += 2;
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break;
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case 24:
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rgb888 = ldl_le_p(src);
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r = (rgb888 >> 0) & 0xff;
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g = (rgb888 >> 8) & 0xff;
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b = (rgb888 >> 16) & 0xff;
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src += 3;
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break;
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case 32:
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rgb888 = ldl_le_p(src);
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r = (rgb888 >> 0) & 0xff;
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g = (rgb888 >> 8) & 0xff;
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b = (rgb888 >> 16) & 0xff;
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src += 4;
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break;
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default:
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r = 0;
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g = 0;
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b = 0;
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break;
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}
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if (s->pixo == 0) {
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/* swap to BGR pixel format */
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uint8_t tmp = r;
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r = b;
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b = tmp;
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}
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switch (bpp) {
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case 8:
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*dst++ = rgb_to_pixel8(r, g, b);
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break;
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case 15:
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*(uint16_t *)dst = rgb_to_pixel15(r, g, b);
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dst += 2;
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break;
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case 16:
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*(uint16_t *)dst = rgb_to_pixel16(r, g, b);
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dst += 2;
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break;
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case 24:
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rgb888 = rgb_to_pixel24(r, g, b);
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*dst++ = rgb888 & 0xff;
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*dst++ = (rgb888 >> 8) & 0xff;
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*dst++ = (rgb888 >> 16) & 0xff;
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break;
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case 32:
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*(uint32_t *)dst = rgb_to_pixel32(r, g, b);
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dst += 4;
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break;
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default:
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return;
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}
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}
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}
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static void fb_update_display(void *opaque)
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{
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BCM2835FBState *s = opaque;
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DisplaySurface *surface = qemu_console_surface(s->con);
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int first = 0;
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int last = 0;
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int src_width = 0;
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int dest_width = 0;
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if (s->lock || !s->xres) {
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return;
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}
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src_width = s->xres * (s->bpp >> 3);
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dest_width = s->xres;
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switch (surface_bits_per_pixel(surface)) {
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case 0:
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return;
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case 8:
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break;
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case 15:
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dest_width *= 2;
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break;
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case 16:
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dest_width *= 2;
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break;
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case 24:
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dest_width *= 3;
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break;
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case 32:
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dest_width *= 4;
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break;
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default:
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hw_error("bcm2835_fb: bad color depth\n");
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break;
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}
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if (s->invalidate) {
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framebuffer_update_memory_section(&s->fbsection, s->dma_mr, s->base,
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s->yres, src_width);
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}
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framebuffer_update_display(surface, &s->fbsection, s->xres, s->yres,
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src_width, dest_width, 0, s->invalidate,
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draw_line_src16, s, &first, &last);
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if (first >= 0) {
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dpy_gfx_update(s->con, 0, first, s->xres, last - first + 1);
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}
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s->invalidate = false;
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}
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static void bcm2835_fb_mbox_push(BCM2835FBState *s, uint32_t value)
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{
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value &= ~0xf;
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s->lock = true;
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s->xres = ldl_le_phys(&s->dma_as, value);
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s->yres = ldl_le_phys(&s->dma_as, value + 4);
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s->xres_virtual = ldl_le_phys(&s->dma_as, value + 8);
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s->yres_virtual = ldl_le_phys(&s->dma_as, value + 12);
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s->bpp = ldl_le_phys(&s->dma_as, value + 20);
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s->xoffset = ldl_le_phys(&s->dma_as, value + 24);
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s->yoffset = ldl_le_phys(&s->dma_as, value + 28);
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s->base = s->vcram_base | (value & 0xc0000000);
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s->base += BCM2835_FB_OFFSET;
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/* TODO - Manage properly virtual resolution */
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s->pitch = s->xres * (s->bpp >> 3);
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s->size = s->yres * s->pitch;
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stl_le_phys(&s->dma_as, value + 16, s->pitch);
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stl_le_phys(&s->dma_as, value + 32, s->base);
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stl_le_phys(&s->dma_as, value + 36, s->size);
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s->invalidate = true;
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qemu_console_resize(s->con, s->xres, s->yres);
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s->lock = false;
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}
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void bcm2835_fb_reconfigure(BCM2835FBState *s, uint32_t *xres, uint32_t *yres,
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uint32_t *xoffset, uint32_t *yoffset, uint32_t *bpp,
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uint32_t *pixo, uint32_t *alpha)
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{
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s->lock = true;
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/* TODO: input validation! */
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if (xres) {
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s->xres = *xres;
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}
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if (yres) {
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s->yres = *yres;
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}
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if (xoffset) {
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s->xoffset = *xoffset;
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}
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if (yoffset) {
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s->yoffset = *yoffset;
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}
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if (bpp) {
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s->bpp = *bpp;
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}
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if (pixo) {
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s->pixo = *pixo;
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}
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if (alpha) {
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s->alpha = *alpha;
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}
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/* TODO - Manage properly virtual resolution */
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s->pitch = s->xres * (s->bpp >> 3);
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s->size = s->yres * s->pitch;
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s->invalidate = true;
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qemu_console_resize(s->con, s->xres, s->yres);
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s->lock = false;
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}
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static uint64_t bcm2835_fb_read(void *opaque, hwaddr offset, unsigned size)
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{
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BCM2835FBState *s = opaque;
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uint32_t res = 0;
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switch (offset) {
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case MBOX_AS_DATA:
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res = MBOX_CHAN_FB;
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s->pending = false;
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qemu_set_irq(s->mbox_irq, 0);
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break;
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case MBOX_AS_PENDING:
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res = s->pending;
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break;
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default:
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qemu_log_mask(LOG_GUEST_ERROR, "%s: Bad offset %"HWADDR_PRIx"\n",
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__func__, offset);
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return 0;
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}
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return res;
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}
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static void bcm2835_fb_write(void *opaque, hwaddr offset, uint64_t value,
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unsigned size)
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{
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BCM2835FBState *s = opaque;
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switch (offset) {
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case MBOX_AS_DATA:
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/* bcm2835_mbox should check our pending status before pushing */
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assert(!s->pending);
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s->pending = true;
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bcm2835_fb_mbox_push(s, value);
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qemu_set_irq(s->mbox_irq, 1);
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break;
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default:
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qemu_log_mask(LOG_GUEST_ERROR, "%s: Bad offset %"HWADDR_PRIx"\n",
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__func__, offset);
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return;
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}
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}
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static const MemoryRegionOps bcm2835_fb_ops = {
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.read = bcm2835_fb_read,
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.write = bcm2835_fb_write,
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.endianness = DEVICE_NATIVE_ENDIAN,
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.valid.min_access_size = 4,
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.valid.max_access_size = 4,
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};
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static const VMStateDescription vmstate_bcm2835_fb = {
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.name = TYPE_BCM2835_FB,
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.version_id = 1,
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.minimum_version_id = 1,
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.fields = (VMStateField[]) {
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VMSTATE_BOOL(lock, BCM2835FBState),
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VMSTATE_BOOL(invalidate, BCM2835FBState),
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VMSTATE_BOOL(pending, BCM2835FBState),
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VMSTATE_UINT32(xres, BCM2835FBState),
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VMSTATE_UINT32(yres, BCM2835FBState),
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VMSTATE_UINT32(xres_virtual, BCM2835FBState),
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VMSTATE_UINT32(yres_virtual, BCM2835FBState),
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VMSTATE_UINT32(xoffset, BCM2835FBState),
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VMSTATE_UINT32(yoffset, BCM2835FBState),
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VMSTATE_UINT32(bpp, BCM2835FBState),
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VMSTATE_UINT32(base, BCM2835FBState),
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VMSTATE_UINT32(pitch, BCM2835FBState),
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VMSTATE_UINT32(size, BCM2835FBState),
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VMSTATE_UINT32(pixo, BCM2835FBState),
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VMSTATE_UINT32(alpha, BCM2835FBState),
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VMSTATE_END_OF_LIST()
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}
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};
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static const GraphicHwOps vgafb_ops = {
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.invalidate = fb_invalidate_display,
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.gfx_update = fb_update_display,
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};
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static void bcm2835_fb_init(Object *obj)
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{
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BCM2835FBState *s = BCM2835_FB(obj);
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memory_region_init_io(&s->iomem, obj, &bcm2835_fb_ops, s, TYPE_BCM2835_FB,
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0x10);
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sysbus_init_mmio(SYS_BUS_DEVICE(s), &s->iomem);
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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->xres_virtual = s->xres;
|
||||
s->yres_virtual = s->yres;
|
||||
s->xoffset = 0;
|
||||
s->yoffset = 0;
|
||||
s->base = s->vcram_base + BCM2835_FB_OFFSET;
|
||||
s->pitch = s->xres * (s->bpp >> 3);
|
||||
s->size = s->yres * s->pitch;
|
||||
|
||||
s->invalidate = true;
|
||||
s->lock = false;
|
||||
}
|
||||
|
||||
static void bcm2835_fb_realize(DeviceState *dev, Error **errp)
|
||||
{
|
||||
BCM2835FBState *s = BCM2835_FB(dev);
|
||||
Error *err = NULL;
|
||||
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", &err);
|
||||
if (obj == NULL) {
|
||||
error_setg(errp, "%s: required dma-mr link not found: %s",
|
||||
__func__, error_get_pretty(err));
|
||||
return;
|
||||
}
|
||||
|
||||
s->dma_mr = MEMORY_REGION(obj);
|
||||
address_space_init(&s->dma_as, s->dma_mr, NULL);
|
||||
|
||||
bcm2835_fb_reset(dev);
|
||||
|
||||
s->con = graphic_console_init(dev, 0, &vgafb_ops, s);
|
||||
qemu_console_resize(s->con, s->xres, s->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, xres, 640),
|
||||
DEFINE_PROP_UINT32("yres", BCM2835FBState, yres, 480),
|
||||
DEFINE_PROP_UINT32("bpp", BCM2835FBState, bpp, 16),
|
||||
DEFINE_PROP_UINT32("pixo", BCM2835FBState, pixo, 1), /* 1=RGB, 0=BGR */
|
||||
DEFINE_PROP_UINT32("alpha", BCM2835FBState, alpha, 2), /* alpha ignored */
|
||||
DEFINE_PROP_END_OF_LIST()
|
||||
};
|
||||
|
||||
static void bcm2835_fb_class_init(ObjectClass *klass, void *data)
|
||||
{
|
||||
DeviceClass *dc = DEVICE_CLASS(klass);
|
||||
|
||||
dc->props = 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)
|
||||
@ -15,6 +15,7 @@
|
||||
#include "exec/address-spaces.h"
|
||||
#include "hw/sysbus.h"
|
||||
#include "hw/char/bcm2835_aux.h"
|
||||
#include "hw/display/bcm2835_fb.h"
|
||||
#include "hw/intc/bcm2835_ic.h"
|
||||
#include "hw/misc/bcm2835_property.h"
|
||||
#include "hw/misc/bcm2835_mbox.h"
|
||||
@ -35,6 +36,7 @@ typedef struct BCM2835PeripheralState {
|
||||
|
||||
SysBusDevice *uart0;
|
||||
BCM2835AuxState aux;
|
||||
BCM2835FBState fb;
|
||||
BCM2835ICState ic;
|
||||
BCM2835PropertyState property;
|
||||
BCM2835MboxState mboxes;
|
||||
|
||||
47
include/hw/display/bcm2835_fb.h
Normal file
47
include/hw/display/bcm2835_fb.h
Normal file
@ -0,0 +1,47 @@
|
||||
/*
|
||||
* Raspberry Pi emulation (c) 2012 Gregory Estrade
|
||||
* Upstreaming code cleanup [including bcm2835_*] (c) 2013 Jan Petrous
|
||||
*
|
||||
* Rasperry Pi 2 emulation and refactoring Copyright (c) 2015, Microsoft
|
||||
* Written by Andrew Baumann
|
||||
*
|
||||
* This code is licensed under the GNU GPLv2 and later.
|
||||
*/
|
||||
|
||||
#ifndef BCM2835_FB_H
|
||||
#define BCM2835_FB_H
|
||||
|
||||
#include "hw/sysbus.h"
|
||||
#include "exec/address-spaces.h"
|
||||
#include "ui/console.h"
|
||||
|
||||
#define TYPE_BCM2835_FB "bcm2835-fb"
|
||||
#define BCM2835_FB(obj) OBJECT_CHECK(BCM2835FBState, (obj), TYPE_BCM2835_FB)
|
||||
|
||||
typedef struct {
|
||||
/*< private >*/
|
||||
SysBusDevice busdev;
|
||||
/*< public >*/
|
||||
|
||||
uint32_t vcram_base, vcram_size;
|
||||
MemoryRegion *dma_mr;
|
||||
AddressSpace dma_as;
|
||||
MemoryRegion iomem;
|
||||
MemoryRegionSection fbsection;
|
||||
QemuConsole *con;
|
||||
qemu_irq mbox_irq;
|
||||
|
||||
bool lock, invalidate, pending;
|
||||
uint32_t xres, yres;
|
||||
uint32_t xres_virtual, yres_virtual;
|
||||
uint32_t xoffset, yoffset;
|
||||
uint32_t bpp;
|
||||
uint32_t base, pitch, size;
|
||||
uint32_t pixo, alpha;
|
||||
} BCM2835FBState;
|
||||
|
||||
void bcm2835_fb_reconfigure(BCM2835FBState *s, uint32_t *xres, uint32_t *yres,
|
||||
uint32_t *xoffset, uint32_t *yoffset, uint32_t *bpp,
|
||||
uint32_t *pixo, uint32_t *alpha);
|
||||
|
||||
#endif
|
||||
Loading…
Reference in New Issue
Block a user