X-Git-Url: http://git.mutantstargoat.com/user/nuclear/?p=rpikern;a=blobdiff_plain;f=src%2Fvideo.c;fp=src%2Fvideo.c;h=33b740f09ce28788a5d86d8968479fa1e4383cca;hp=0000000000000000000000000000000000000000;hb=203b43a75a028e9238307bd6e73768eb8e942071;hpb=e848811902a51b67dedb6f6325dda19a6f21e820

diff --git a/src/video.c b/src/video.c
new file mode 100644
index 0000000..33b740f
--- /dev/null
+++ b/src/video.c
@@ -0,0 +1,68 @@
+#include "config.h"
+#include <string.h>
+#include <stdint.h>
+#include "video.h"
+#include "serial.h"
+#include "mem.h"
+
+#define MBOX_READ_REG	(*(volatile uint32_t*)(IO_BASE | 0xb880))
+#define MBOX_POLL_REG	(*(volatile uint32_t*)(IO_BASE | 0xb890))
+#define MBOX_SENDER_REG	(*(volatile uint32_t*)(IO_BASE | 0xb894))
+#define MBOX_STATUS_REG	(*(volatile uint32_t*)(IO_BASE | 0xb898))
+#define MBOX_CFG_REG	(*(volatile uint32_t*)(IO_BASE | 0xb89c))
+#define MBOX_WRITE_REG	(*(volatile uint32_t*)(IO_BASE | 0xb8a0))
+
+#define MBOX_STAT_WRBUSY	0x80000000
+#define MBOX_STAT_RDBUSY	0x40000000
+
+struct vc_fbinfo {
+	uint32_t phys_width, phys_height;
+	uint32_t virt_width, virt_height;
+	uint32_t pitch;			/* filled by videocore */
+	uint32_t depth;
+	uint32_t x, y;
+	void *addr;		/* filled by videocore */
+	uint32_t size;	/* filled by videocore */
+};
+
+void mbox_write(int mbox, uint32_t msg);
+uint32_t mbox_read(int mbox);
+
+static struct vc_fbinfo fbinf __attribute__((aligned(16)));
+
+int video_init(void)
+{
+	memset(&fbinf, 0, sizeof fbinf);
+	fbinf.phys_width = fbinf.virt_width = 1024;
+	fbinf.phys_height = fbinf.virt_height = 600;
+	fbinf.depth = 32;
+	fbinf.x = fbinf.y = 0;
+
+	mbox_write(1, MEM_BUS_COHERENT(&fbinf));
+	if(mbox_read(1) != 0) {
+		ser_printstr("Failed to initialize display\n");
+		return -1;
+	}
+
+	ser_printstr("Video init successful\n");
+	memset(fbinf.addr, 0, fbinf.size);
+	return 0;
+}
+
+void mbox_write(int mbox, uint32_t msg)
+{
+	while(MBOX_STATUS_REG & MBOX_STAT_WRBUSY);
+	MBOX_WRITE_REG = (msg & 0xfffffff0) | mbox;
+}
+
+uint32_t mbox_read(int mbox)
+{
+	uint32_t msg;
+
+	do {
+		while(MBOX_STATUS_REG & MBOX_STAT_RDBUSY);
+		msg = MBOX_READ_REG;
+	} while((msg & 0xf) != mbox);
+
+	return msg & 0xfffffff0;
+}