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-rw-r--r--boards/base/RaspberryPi/board.mk4
-rw-r--r--boards/base/RaspberryPi/board_framebuffer.h89
-rw-r--r--boards/base/RaspberryPi/readme.txt18
-rw-r--r--boards/base/RaspberryPi/rpi_mailbox.c47
-rw-r--r--boards/base/RaspberryPi/rpi_mailbox.h7
5 files changed, 165 insertions, 0 deletions
diff --git a/boards/base/RaspberryPi/board.mk b/boards/base/RaspberryPi/board.mk
new file mode 100644
index 00000000..99fc64db
--- /dev/null
+++ b/boards/base/RaspberryPi/board.mk
@@ -0,0 +1,4 @@
+GFXINC += $(GFXLIB)/boards/base/RaspberryPi
+GFXSRC += $(GFXLIB)/boards/base/RaspberryPi/rpi_mailbox.c
+
+include $(GFXLIB)/drivers/gdisp/framebuffer/driver.mk
diff --git a/boards/base/RaspberryPi/board_framebuffer.h b/boards/base/RaspberryPi/board_framebuffer.h
new file mode 100644
index 00000000..eeefeb06
--- /dev/null
+++ b/boards/base/RaspberryPi/board_framebuffer.h
@@ -0,0 +1,89 @@
+/*
+ * This file is subject to the terms of the GFX License. If a copy of
+ * the license was not distributed with this file, you can obtain one at:
+ *
+ * http://ugfx.org/license.html
+ */
+
+
+// Set this to your frame buffer pixel format and size. You can also override these in your makefile.
+#ifndef GDISP_LLD_PIXELFORMAT
+ #define GDISP_LLD_PIXELFORMAT GDISP_PIXELFORMAT_RGB565
+#endif
+#ifndef GDISP_SCREEN_WIDTH
+ #define GDISP_SCREEN_WIDTH 800
+#endif
+#ifndef GDISP_SCREEN_HEIGHT
+ #define GDISP_SCREEN_HEIGHT 600
+#endif
+
+#ifdef GDISP_DRIVER_VMT
+
+ #if GDISP_SCREEN_WIDTH > 4096 || GDISP_SCREEN_HEIGHT > 4096
+ #error "Raspberry Pi Framebuffer: Screen size is defined too large. Max is 4096x4096"
+ #endif
+
+ #include "rpi_mailbox.h"
+
+ typedef struct FrameBufferDescription {
+ uint32_t width;
+ uint32_t height;
+ uint32_t vWidth;
+ uint32_t vHeight;
+ uint32_t pitch;
+ uint32_t bitDepth;
+ uint32_t x;
+ uint32_t y;
+ void * pointer;
+ uint32_t size;
+ } FrameBufferDescription;
+
+ static FrameBufferDescription FrameBufferInfo __attribute__((aligned (16))) = { 1024, 768, 1024, 768, 0, 24, 0, 0, 0, 0 };
+
+ static void board_init(GDisplay *g, fbInfo *fbi) {
+ // Initialize the Raspberry Pi frame buffer
+
+ FrameBufferInfo.width = GDISP_SCREEN_WIDTH;
+ FrameBufferInfo.height = GDISP_SCREEN_HEIGHT;
+ FrameBufferInfo.vWidth = GDISP_SCREEN_WIDTH;
+ FrameBufferInfo.vHeight = GDISP_SCREEN_HEIGHT;
+ FrameBufferInfo.bitDepth = LLDCOLOR_BITS;
+
+ rpi_writemailbox(1, 0x40000000 + (uint32_t) &FrameBufferInfo);
+
+ if (rpi_readmailbox(1) != 0)
+ gfxHalt("Could not set display parameters")
+
+ // Set the details of the frame buffer
+ g->g.Width = GDISP_SCREEN_WIDTH;
+ g->g.Height = GDISP_SCREEN_HEIGHT;
+ g->g.Backlight = 100;
+ g->g.Contrast = 50;
+ fbi->linelen = g->g.Width * sizeof(LLDCOLOR_TYPE); // bytes per row
+ fbi->pixels = FrameBufferInfo.pointer; // pointer to the memory frame buffer
+ }
+
+ #if GDISP_HARDWARE_FLUSH
+ static void board_flush(GDisplay *g) {
+ (void) g;
+ }
+ #endif
+
+ #if GDISP_NEED_CONTROL
+ static void board_backlight(GDisplay *g, uint8_t percent) {
+ (void) g;
+ (void) percent;
+ }
+
+ static void board_contrast(GDisplay *g, uint8_t percent) {
+ (void) g;
+ (void) percent;
+ }
+
+ static void board_power(GDisplay *g, powermode_t pwr) {
+ (void) g;
+ (void) pwr;
+ }
+ #endif
+
+#endif /* GDISP_DRIVER_VMT */
diff --git a/boards/base/RaspberryPi/readme.txt b/boards/base/RaspberryPi/readme.txt
new file mode 100644
index 00000000..d4a59bf2
--- /dev/null
+++ b/boards/base/RaspberryPi/readme.txt
@@ -0,0 +1,18 @@
+This directory contains the interface for the Raspberry Pi framebuffer.
+This talks directly to the raspberry pi hardware (not via a linux framebuffer driver).
+
+This graphics interface is software driven - it is not an accelerated interface.
+
+This board definition should work on any operating system that will work on the Raspberry Pi
+ eg. Linux, FreeRTOS.
+
+On this board uGFX currently supports:
+ - GDISP via the framebuffer driver
+
+THe following variables may optionally be defined in your gfxconf.h or your makefile...
+ - GDISP_LLD_PIXELFORMAT default = GDISP_PIXELFORMAT_RGB565
+ - GDISP_SCREEN_WIDTH default = 800
+ - GDISP_SCREEN_HEIGHT default = 600
+
+Note that this also provides a Raspberry Pi specific api defined in rpi_mailbox.h to talk
+directly to the graphics co-processor from the ARM processor.
diff --git a/boards/base/RaspberryPi/rpi_mailbox.c b/boards/base/RaspberryPi/rpi_mailbox.c
new file mode 100644
index 00000000..798cbb1f
--- /dev/null
+++ b/boards/base/RaspberryPi/rpi_mailbox.c
@@ -0,0 +1,47 @@
+/*
+ * Access system mailboxes
+ */
+#include "rpi_mailbox.h"
+
+/* Mailbox memory addresses */
+static volatile unsigned int *MAILBOX0READ = (unsigned int *) (0x2000b880);
+static volatile unsigned int *MAILBOX0STATUS = (unsigned int *) (0x2000b898);
+static volatile unsigned int *MAILBOX0WRITE = (unsigned int *) (0x2000b8a0);
+
+/* Bit 31 set in status register if the write mailbox is full */
+#define MAILBOX_FULL 0x80000000
+
+/* Bit 30 set in status register if the read mailbox is empty */
+#define MAILBOX_EMPTY 0x40000000
+
+unsigned int rpi_readmailbox(unsigned int channel)
+{
+ unsigned int val;
+
+ if (channel > 15)
+ return 0xFFFFFFFF;
+
+ /* Wait for mailbox to be full */
+ while (*MAILBOX0STATUS & MAILBOX_EMPTY);
+
+ val = *MAILBOX0READ;
+
+ if ((val & 15) == channel)
+ return (val & 0xFFFFFFF0);
+ else
+ return 0xFFFFFFFF;
+}
+
+void rpi_writemailbox(unsigned int channel, unsigned int data)
+{
+ if (channel > 15)
+ return;
+
+ if (data & 0x000F)
+ return;
+
+ /* Wait for mailbox to be not full */
+ while (*MAILBOX0STATUS & MAILBOX_FULL);
+
+ *MAILBOX0WRITE = (data | channel);
+}
diff --git a/boards/base/RaspberryPi/rpi_mailbox.h b/boards/base/RaspberryPi/rpi_mailbox.h
new file mode 100644
index 00000000..f3c03a26
--- /dev/null
+++ b/boards/base/RaspberryPi/rpi_mailbox.h
@@ -0,0 +1,7 @@
+#ifndef RPI_MAILBOX_H
+#define RPI_MAILBOX_H
+
+extern unsigned int readmailbox(unsigned int channel);
+extern void writemailbox(unsigned int channel, unsigned int data);
+
+#endif /* RPI_MAILBOX_H */