[U-Boot] efi_loader: Add GOP support

diff --git a/cmd/bootefi.c b/cmd/bootefi.c
index faa6978..3bc4c95 100644
--- a/cmd/bootefi.c
+++ b/cmd/bootefi.c
@@ -141,6 +141,9 @@  static unsigned long do_bootefi_exec(void *efi)
 #ifdef CONFIG_PARTITIONS
 	efi_disk_register();
 #endif
+#ifdef CONFIG_LCD
+	efi_gop_register();
+#endif
 
 	/* Call our payload! */
 #ifdef DEBUG_EFI
diff --git a/include/efi_api.h b/include/efi_api.h
index 03f6687..6960448 100644
--- a/include/efi_api.h
+++ b/include/efi_api.h
@@ -365,4 +365,51 @@  struct efi_console_control_protocol
 			uint16_t *password);
 };
 
+#define EFI_GOP_GUID \
+	EFI_GUID(0x9042a9de, 0x23dc, 0x4a38, \
+		 0x96, 0xfb, 0x7a, 0xde, 0xd0, 0x80, 0x51, 0x6a)
+
+#define EFI_GOT_RGBA8		0
+#define EFI_GOT_BGRA8		1
+#define EFI_GOT_BITMASK		2
+
+struct efi_gop_mode_info
+{
+	u32 version;
+	u32 width;
+	u32 height;
+	u32 pixel_format;
+	u32 pixel_bitmask[4];
+	u32 pixels_per_scanline;
+};
+
+struct efi_gop_mode
+{
+	u32 max_mode;
+	u32 mode;
+	struct efi_gop_mode_info *info;
+	unsigned long info_size;
+	efi_physical_addr_t fb_base;
+	unsigned long fb_size;
+};
+
+#define EFI_BLT_VIDEO_FILL		0
+#define EFI_BLT_VIDEO_TO_BLT_BUFFER	1
+#define EFI_BLT_BUFFER_TO_VIDEO		2
+#define EFI_BLT_VIDEO_TO_VIDEO		3
+
+struct efi_gop
+{
+	efi_status_t (EFIAPI *query_mode)(struct efi_gop *this, u32 mode_number,
+					  unsigned long *size_of_info,
+					  struct efi_gop_mode_info **info);
+	efi_status_t (EFIAPI *set_mode)(struct efi_gop *this, u32 mode_number);
+	efi_status_t (EFIAPI *blt)(struct efi_gop *this, void *buffer,
+				   unsigned long operation, unsigned long sx,
+				   unsigned long sy, unsigned long dx,
+				   unsigned long dy, unsigned long width,
+				   unsigned long height, unsigned long delta);
+	struct efi_gop_mode *mode;
+};
+
 #endif
diff --git a/include/efi_loader.h b/include/efi_loader.h
index 385239b..129f2b7 100644
--- a/include/efi_loader.h
+++ b/include/efi_loader.h
@@ -88,6 +88,8 @@  extern struct list_head efi_obj_list;
 
 /* Called by bootefi to make all disk storage accessible as EFI objects */
 int efi_disk_register(void);
+/* Called by bootefi to make GOP (graphical) interface available */
+int efi_gop_register(void);
 /*
  * Stub implementation for a protocol opener that just returns the handle as
  * interface
diff --git a/lib/efi_loader/Makefile b/lib/efi_loader/Makefile
index 28725a2..83e31f6 100644
--- a/lib/efi_loader/Makefile
+++ b/lib/efi_loader/Makefile
@@ -9,4 +9,5 @@ 
 
 obj-y += efi_image_loader.o efi_boottime.o efi_runtime.o efi_console.o
 obj-y += efi_memory.o
+obj-$(CONFIG_LCD) += efi_gop.o
 obj-$(CONFIG_PARTITIONS) += efi_disk.o
diff --git a/lib/efi_loader/efi_gop.c b/lib/efi_loader/efi_gop.c
new file mode 100644
index 0000000..bdd62bc
--- /dev/null
+++ b/lib/efi_loader/efi_gop.c
@@ -0,0 +1,152 @@ 
+/*
+ *  EFI application disk support
+ *
+ *  Copyright (c) 2016 Alexander Graf
+ *
+ *  SPDX-License-Identifier:     GPL-2.0+
+ */
+
+#include <common.h>
+#include <efi_loader.h>
+#include <inttypes.h>
+#include <lcd.h>
+#include <malloc.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+static const efi_guid_t efi_gop_guid = EFI_GOP_GUID;
+
+struct efi_gop_obj {
+	/* Generic EFI object parent class data */
+	struct efi_object parent;
+	/* EFI Interface callback struct for gop */
+	struct efi_gop ops;
+	/* The only mode we support */
+	struct efi_gop_mode_info info;
+	struct efi_gop_mode mode;
+};
+
+static efi_status_t EFIAPI gop_query_mode(struct efi_gop *this, u32 mode_number,
+					  unsigned long *size_of_info,
+					  struct efi_gop_mode_info **info)
+{
+	struct efi_gop_obj *gopobj;
+
+	EFI_ENTRY("%p, %x, %p, %p", this, mode_number, size_of_info, info);
+
+	gopobj = container_of(this, struct efi_gop_obj, ops);
+	*size_of_info = sizeof(gopobj->info);
+	*info = &gopobj->info;
+
+	return EFI_EXIT(EFI_SUCCESS);
+}
+
+static efi_status_t EFIAPI gop_set_mode(struct efi_gop *this, u32 mode_number)
+{
+	EFI_ENTRY("%p, %x", this, mode_number);
+
+	if (mode_number != 0)
+		return EFI_EXIT(EFI_INVALID_PARAMETER);
+
+	return EFI_EXIT(EFI_SUCCESS);
+}
+
+static efi_status_t EFIAPI gop_blt(struct efi_gop *this, void *buffer,
+				   unsigned long operation, unsigned long sx,
+				   unsigned long sy, unsigned long dx,
+				   unsigned long dy, unsigned long width,
+				   unsigned long height, unsigned long delta)
+{
+	int i, j, line_len16, line_len32;
+	void *fb;
+
+	EFI_ENTRY("%p, %p, %lx, %lx, %lx, %lx, %lx, %lx, %lx, %lx", this,
+		  buffer, operation, sx, sy, dx, dy, width, height, delta);
+
+	if (operation != EFI_BLT_BUFFER_TO_VIDEO)
+		return EFI_EXIT(EFI_INVALID_PARAMETER);
+
+	fb = (void*)gd->fb_base;
+	line_len16 = panel_info.vl_col * sizeof(u16);
+	line_len32 = panel_info.vl_col * sizeof(u32);
+
+	/* Copy the contents line by line */
+
+	switch (panel_info.vl_bpix) {
+	case LCD_COLOR32:
+		for (i = 0; i < height; i++) {
+			u32 *dest = fb + ((i + dy)  * line_len32) +
+					 (dx * sizeof(u32));
+			u32 *src = buffer + ((i + sy)  * line_len32) +
+					 (sx * sizeof(u32));
+
+			/* Same color format, just memcpy */
+			memcpy(dest, src, width * sizeof(u32));
+		}
+		break;
+	case LCD_COLOR16:
+		for (i = 0; i < height; i++) {
+			u16 *dest = fb + ((i + dy)  * line_len16) +
+					 (dx * sizeof(u16));
+			u32 *src = buffer + ((i + sy)  * line_len32) +
+					 (sx * sizeof(u32));
+
+			/* Convert from rgb888 to rgb565 */
+			for (j = 0; j < width; j++) {
+				u32 rgb888 = src[j];
+				dest[j] = ((((rgb888 >> (16 + 3)) & 0x1f) << 11) |
+					   (((rgb888 >> (8 + 2)) & 0x3f) << 5) |
+					   (((rgb888 >> (0 + 3)) & 0x1f) << 0));
+			}
+		}
+		break;
+	}
+
+	lcd_sync();
+
+	return EFI_EXIT(EFI_SUCCESS);
+}
+
+/* This gets called from do_bootefi_exec(). */
+int efi_gop_register(void)
+{
+	struct efi_gop_obj *gopobj;
+	int line_len;
+
+	switch (panel_info.vl_bpix) {
+	case LCD_COLOR32:
+	case LCD_COLOR16:
+		break;
+	default:
+		/* So far, we only work in 16 or 32 bit mode */
+		return -1;
+	}
+
+	gopobj = calloc(1, sizeof(*gopobj));
+
+	/* Fill in object data */
+	gopobj->parent.protocols[0].guid = &efi_gop_guid;
+	gopobj->parent.protocols[0].open = efi_return_handle;
+	gopobj->parent.handle = &gopobj->ops;
+	gopobj->ops.query_mode = gop_query_mode;
+	gopobj->ops.set_mode = gop_set_mode;
+	gopobj->ops.blt = gop_blt;
+	gopobj->ops.mode = &gopobj->mode;
+
+	gopobj->mode.max_mode = 1;
+	gopobj->mode.info = &gopobj->info;
+	gopobj->mode.info_size = sizeof(gopobj->info);
+	gopobj->mode.fb_base = gd->fb_base;
+	gopobj->mode.fb_size = lcd_get_size(&line_len);
+
+	gopobj->info.version = 0;
+	gopobj->info.width = panel_info.vl_col;
+	gopobj->info.height = panel_info.vl_row;
+	gopobj->info.pixel_format = EFI_GOT_RGBA8;
+	gopobj->info.pixels_per_scanline = panel_info.vl_col;
+
+	/* Hook up to the device list */
+	list_add_tail(&gopobj->parent.link, &efi_obj_list);
+
+	return 0;
+}