libbcmhost-shim: new shim library for r-pi's bcm stuff

diff --git a/recipes/armhf/libbcmhost-shim/Makefile b/recipes/armhf/libbcmhost-shim/Makefile
new file mode 100644 (file)
index 0000000..26486ac
--- /dev/null
+++ b/recipes/armhf/libbcmhost-shim/Makefile
@@ -0,0 +1,17 @@
+CC = $(CROSS_COMPILE)gcc
+CFLAGS += -Wall -O2 -g -fPIC
+LDFLAGS += -Wl,-z -Wl,defs
+LDLIBS += -ldl
+
+TARGET = libbcm_host.so
+OBJS = bcm_host_shim.o
+
+all: $(TARGET)
+
+$(TARGET): $(OBJS)
+       $(CC) -shared -o $@ $^ $(LDFLAGS) $(LDLIBS)
+
+clean:
+       $(RM) $(TARGET) $(OBJS)
+
+.PHONY: all clean

diff --git a/recipes/armhf/libbcmhost-shim/bcm_host_shim.c b/recipes/armhf/libbcmhost-shim/bcm_host_shim.c
new file mode 100644 (file)
index 0000000..be4e5ce
--- /dev/null
+++ b/recipes/armhf/libbcmhost-shim/bcm_host_shim.c
@@ -0,0 +1,162 @@
+/*
+ * bcm_host_shim
+ * (C) notaz, 2016
+ *
+ * This work is licensed under the terms of 3-clause BSD license.
+ */
+#define _GNU_SOURCE
+#include <stdio.h>
+#include <stdint.h>
+#include <unistd.h>
+#include <dlfcn.h>
+
+#define SCREEN_WIDTH  800
+#define SCREEN_HEIGHT 480
+
+#define ARRAY_SIZE(x) (sizeof(x) / sizeof(x[0]))
+
+void bcm_host_init(void)
+{
+}
+
+void bcm_host_deinit(void)
+{
+}
+
+uint32_t vc_dispmanx_display_open(uint32_t dev)
+{
+       return 0xf00;
+}
+
+uint32_t vc_dispmanx_element_add()
+{
+       return 0xf04;
+}
+
+uint32_t vc_dispmanx_update_start(int32_t prio)
+{
+       return 0xf08;
+}
+
+int vc_dispmanx_update_submit_sync(uint32_t upd_handle)
+{
+       //printf("%s\n", __func__);
+       return 0;
+}
+
+int graphics_get_display_size(uint16_t dpy, uint32_t *w, uint32_t *h)
+{
+       *w = SCREEN_WIDTH;
+       *h = SCREEN_HEIGHT;
+       return 0;
+}
+
+#ifndef SDL_FULLSCREEN
+#define SDL_FULLSCREEN 0x80000000
+#define SDL_RESIZABLE  0x00000010
+#endif
+
+static void *get_real_func(const char *name)
+{
+       void *f;
+
+       f = dlsym(RTLD_NEXT, name);
+       if (f == NULL) {
+               fprintf(stderr, "%s: %s\n", name, dlerror());
+               _exit(1);
+       }
+       return f;
+}
+
+/* pandora's SGX driver can only run fullscreen */
+void *SDL_SetVideoMode(int width, int height, int bpp, uint32_t flags)
+{
+       static void * (*f)(int, int, int, uint32_t);
+
+       //printf("%s %d %x\n", __func__, bpp, flags);
+
+       width = height = bpp = 0;
+       flags &= ~SDL_RESIZABLE;
+       flags |=  SDL_FULLSCREEN;
+
+       if (f == NULL)
+               f = get_real_func(__func__);
+
+       return f(width, height, bpp, flags);
+}
+
+int SDL_PollEvent(void *e)
+{
+       static int (*f)(void *);
+       int ret;
+
+       if (f == NULL)
+               f = get_real_func(__func__);
+
+       ret = f(e);
+
+       // event, SDL_KEYDOWN, SDLK_q
+       if (ret != 0 && e != NULL) {
+               if (*(uint8_t *)e == 2 && ((uint32_t *)e)[2] == 113)
+                       *(uint8_t *)e = 12; // SDL_QUIT
+       }
+
+       return ret;
+}
+
+/* can't use 8bits/channel on pandora, must filter out confing */
+#ifndef EGL_NONE
+#define EGL_NONE                          0x3038
+#define EGL_RED_SIZE                      0x3024
+#define EGL_GREEN_SIZE                    0x3023
+#define EGL_BLUE_SIZE                     0x3022
+#define EGL_ALPHA_SIZE                    0x3021
+#define EGL_SURFACE_TYPE                  0x3033
+#endif
+
+int eglChooseConfig(void *dpy, const int32_t *attrib_list,
+       void *configs, int32_t config_size, int32_t *num_config)
+{
+       static int (*f)(void *, const int32_t *,
+                       void *, int32_t, int32_t *);
+       int32_t attrib_list_c[64];
+       int i, o;
+
+       //printf("%s\n", __func__);
+
+       if (f == NULL)
+               f = get_real_func(__func__);
+
+       for (i = o = 0; o < ARRAY_SIZE(attrib_list_c) - 2; i += 2) {
+               if (attrib_list == NULL || attrib_list[i] == EGL_NONE)
+                       break;
+
+               switch (attrib_list[i]) {
+               case EGL_RED_SIZE:
+               case EGL_GREEN_SIZE:
+               case EGL_BLUE_SIZE:
+               case EGL_SURFACE_TYPE:
+               case EGL_ALPHA_SIZE:
+                       continue;
+               }
+
+               attrib_list_c[o++] = attrib_list[i + 0];
+               attrib_list_c[o++] = attrib_list[i + 1];
+       }
+       attrib_list_c[o++] = EGL_NONE;
+
+       return f(dpy, attrib_list_c, configs, config_size, num_config);
+}
+
+void *eglCreateWindowSurface(void *dpy, void *config, void *win,
+       const int32_t *attrib_list)
+{
+       static void * (*f)(void *, void *, void *, const int32_t *);
+
+       //printf("%s\n", __func__);
+
+       if (f == NULL)
+               f = get_real_func(__func__);
+
+       return f(dpy, config, NULL, attrib_list);
+}

diff --git a/recipes/armhf/libbcmhost-shim_0.1.bb b/recipes/armhf/libbcmhost-shim_0.1.bb
new file mode 100644 (file)
index 0000000..ea520f6
--- /dev/null
+++ b/recipes/armhf/libbcmhost-shim_0.1.bb
@@ -0,0 +1,37 @@
+DESCRIPTION = "Shim library for libbcm_host.so found in r-pi"
+SECTION = "libs"
+PRIORITY = "optional"
+LICENSE = "BSD-3-Clause"
+RDEPENDS = "armhflibc6"
+PR = "r0"
+
+SRC_URI = " \
+  file://bcm_host_shim.c \
+  file://Makefile \
+"
+
+# S = "${WORKDIR}/git"
+
+# assumes armhf (arm-unknown-linux-gnueabihf) cross-compiler is available in PATH
+# with all required deps
+do_compile() {
+  cp ${WORKDIR}/bcm_host_shim.c ${S}/
+  cp ${WORKDIR}/Makefile ${S}/
+
+  unset CPP
+  unset CC
+  unset LD
+  unset CPPFLAGS
+  unset CFLAGS
+  unset LDFLAGS
+  export LDFLAGS="-Wl,--hash-style=gnu"
+  make CROSS_COMPILE=arm-unknown-linux-gnueabihf-
+}
+
+do_install() {
+  install -d ${D}/usr/lib/arm-linux-gnueabihf
+  install -m 0755 libbcm_host.so ${D}/usr/lib/arm-linux-gnueabihf/
+}
+
+FILES_${PN} = "usr/lib/arm-linux-gnueabihf/*.so"
+FILES_${PN}-dbg += "usr/lib/arm-linux-gnueabihf/.debug"