dm: video: Add a driver for a rotated text console

Sometimes the console must be rotated. Add a driver which supports rotating
the text clockwise to 90, 180 and 270 degrees. This can support devices
where the display is rotated for mechanical reasons.

Signed-off-by: Simon Glass <sjg@chromium.org>
Acked-by: Anatolij Gustschin <agust@denx.de>

3 files changed, 450 insertions, 0 deletions

diff --git a/drivers/video/Kconfig b/drivers/video/Kconfig
index 946d958..499d00d 100644
--- a/drivers/video/Kconfig
+++ b/drivers/video/Kconfig
@@ -44,6 +44,19 @@ config VIDEO_BPP32
 	  this option, such displays will not be supported and console output
 	  will be empty.
 
+config VIDEO_ROTATION
+	bool "Support rotated displays"
+	depends on DM_VIDEO
+	help
+	  Sometimes, for example if the display is mounted in portrait
+	  mode or even if it's mounted landscape but rotated by 180degree,
+	  we need to rotate our content of the display relative to the
+	  framebuffer, so that user can read the messages which are
+	  printed out. Enable this option to include a text driver which can
+	  support this. The rotation is set by the 'rot' parameter in
+	  struct video_priv: 0=unrotated, 1=90 degrees clockwise, 2=180
+	  degrees, 3=270 degrees.
+
 config VIDEO_VESA
 	bool "Enable VESA video driver support"
 	default n
diff --git a/drivers/video/Makefile b/drivers/video/Makefile
index b4eba8e..8f26d1d 100644
--- a/drivers/video/Makefile
+++ b/drivers/video/Makefile
@@ -8,6 +8,7 @@
 ifdef CONFIG_DM
 obj-$(CONFIG_DISPLAY_PORT) += dp-uclass.o
 obj-$(CONFIG_DM_VIDEO) += video-uclass.o vidconsole-uclass.o console_normal.o
+obj-$(CONFIG_VIDEO_ROTATION) += console_rotate.o
 endif
 
 obj-$(CONFIG_ATI_RADEON_FB) += ati_radeon_fb.o videomodes.o
diff --git a/drivers/video/console_rotate.c b/drivers/video/console_rotate.c
new file mode 100644
index 0000000..ebb31d8
--- /dev/null
+++ b/drivers/video/console_rotate.c
@@ -0,0 +1,436 @@
+/*
+ * Copyright (c) 2015 Google, Inc
+ * (C) Copyright 2015
+ * Bernecker & Rainer Industrieelektronik GmbH - http://www.br-automation.com
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <common.h>
+#include <dm.h>
+#include <video.h>
+#include <video_console.h>
+#include <video_font.h>		/* Get font data, width and height */
+
+static int console_set_row_1(struct udevice *dev, uint row, int clr)
+{
+	struct video_priv *vid_priv = dev_get_uclass_priv(dev->parent);
+	int pbytes = VNBYTES(vid_priv->bpix);
+	void *line;
+	int i, j;
+
+	line = vid_priv->fb + vid_priv->line_length -
+		(row + 1) * VIDEO_FONT_HEIGHT * pbytes;
+	for (j = 0; j < vid_priv->ysize; j++) {
+		switch (vid_priv->bpix) {
+#ifdef CONFIG_VIDEO_BPP8
+		case VIDEO_BPP8: {
+			uint8_t *dst = line;
+
+			for (i = 0; i < VIDEO_FONT_HEIGHT; i++)
+				*dst++ = clr;
+			break;
+		}
+#endif
+#ifdef CONFIG_VIDEO_BPP16
+		case VIDEO_BPP16: {
+			uint16_t *dst = line;
+
+			for (i = 0; i < VIDEO_FONT_HEIGHT; i++)
+				*dst++ = clr;
+			break;
+		}
+#endif
+#ifdef CONFIG_VIDEO_BPP32
+		case VIDEO_BPP32: {
+			uint32_t *dst = line;
+
+			for (i = 0; i < VIDEO_FONT_HEIGHT; i++)
+				*dst++ = clr;
+			break;
+		}
+#endif
+		default:
+			return -ENOSYS;
+		}
+		line += vid_priv->line_length;
+	}
+
+	return 0;
+}
+
+static int console_move_rows_1(struct udevice *dev, uint rowdst, uint rowsrc,
+			       uint count)
+{
+	struct video_priv *vid_priv = dev_get_uclass_priv(dev->parent);
+	void *dst;
+	void *src;
+	int pbytes = VNBYTES(vid_priv->bpix);
+	int j;
+
+	dst = vid_priv->fb + vid_priv->line_length -
+		(rowdst + count) * VIDEO_FONT_HEIGHT * pbytes;
+	src = vid_priv->fb + vid_priv->line_length -
+		(rowsrc + count) * VIDEO_FONT_HEIGHT * pbytes;
+
+	for (j = 0; j < vid_priv->ysize; j++) {
+		memmove(dst, src, VIDEO_FONT_HEIGHT * pbytes * count);
+		src += vid_priv->line_length;
+		dst += vid_priv->line_length;
+	}
+
+	return 0;
+}
+
+static int console_putc_xy_1(struct udevice *dev, uint x, uint y, char ch)
+{
+	struct udevice *vid = dev->parent;
+	struct video_priv *vid_priv = dev_get_uclass_priv(vid);
+	int pbytes = VNBYTES(vid_priv->bpix);
+	int i, col;
+	int mask = 0x80;
+	void *line = vid_priv->fb + (x + 1) * vid_priv->line_length -
+		(y + 1) * pbytes;
+	uchar *pfont = video_fontdata + ch * VIDEO_FONT_HEIGHT;
+
+	for (col = 0; col < VIDEO_FONT_HEIGHT; col++) {
+		switch (vid_priv->bpix) {
+#ifdef CONFIG_VIDEO_BPP8
+		case VIDEO_BPP8: {
+			uint8_t *dst = line;
+
+			for (i = 0; i < VIDEO_FONT_HEIGHT; i++) {
+				*dst-- = (pfont[i] & mask) ? vid_priv->colour_fg
+					: vid_priv->colour_bg;
+			}
+			break;
+		}
+#endif
+#ifdef CONFIG_VIDEO_BPP16
+		case VIDEO_BPP16: {
+			uint16_t *dst = line;
+
+			for (i = 0; i < VIDEO_FONT_HEIGHT; i++) {
+				*dst-- = (pfont[i] & mask) ? vid_priv->colour_fg
+					: vid_priv->colour_bg;
+			}
+			break;
+		}
+#endif
+#ifdef CONFIG_VIDEO_BPP32
+		case VIDEO_BPP32: {
+			uint32_t *dst = line;
+
+			for (i = 0; i < VIDEO_FONT_HEIGHT; i++) {
+				*dst-- = (pfont[i] & mask) ? vid_priv->colour_fg
+					: vid_priv->colour_bg;
+			}
+			break;
+		}
+#endif
+		default:
+			return -ENOSYS;
+		}
+		line += vid_priv->line_length;
+		mask >>= 1;
+	}
+
+	return 0;
+}
+
+
+static int console_set_row_2(struct udevice *dev, uint row, int clr)
+{
+	struct video_priv *vid_priv = dev_get_uclass_priv(dev->parent);
+	void *line;
+	int pixels = VIDEO_FONT_HEIGHT * vid_priv->xsize;
+	int i;
+
+	line = vid_priv->fb + vid_priv->ysize * vid_priv->line_length -
+		(row + 1) * VIDEO_FONT_HEIGHT * vid_priv->line_length;
+	switch (vid_priv->bpix) {
+#ifdef CONFIG_VIDEO_BPP8
+	case VIDEO_BPP8: {
+		uint8_t *dst = line;
+
+		for (i = 0; i < pixels; i++)
+			*dst++ = clr;
+		break;
+	}
+#endif
+#ifdef CONFIG_VIDEO_BPP16
+	case VIDEO_BPP16: {
+		uint16_t *dst = line;
+
+		for (i = 0; i < pixels; i++)
+			*dst++ = clr;
+		break;
+	}
+#endif
+#ifdef CONFIG_VIDEO_BPP32
+	case VIDEO_BPP32: {
+		uint32_t *dst = line;
+
+		for (i = 0; i < pixels; i++)
+			*dst++ = clr;
+		break;
+	}
+#endif
+	default:
+		return -ENOSYS;
+	}
+
+	return 0;
+}
+
+static int console_move_rows_2(struct udevice *dev, uint rowdst, uint rowsrc,
+			       uint count)
+{
+	struct video_priv *vid_priv = dev_get_uclass_priv(dev->parent);
+	void *dst;
+	void *src;
+	void *end;
+
+	end = vid_priv->fb + vid_priv->ysize * vid_priv->line_length;
+	dst = end - (rowdst + count) * VIDEO_FONT_HEIGHT *
+		vid_priv->line_length;
+	src = end - (rowsrc + count) * VIDEO_FONT_HEIGHT *
+		vid_priv->line_length;
+	memmove(dst, src, VIDEO_FONT_HEIGHT * vid_priv->line_length * count);
+
+	return 0;
+}
+
+static int console_putc_xy_2(struct udevice *dev, uint x, uint y, char ch)
+{
+	struct udevice *vid = dev->parent;
+	struct video_priv *vid_priv = dev_get_uclass_priv(vid);
+	int i, row;
+	void *line;
+
+	line = vid_priv->fb + (vid_priv->ysize - y - 1) *
+		vid_priv->line_length +
+		(vid_priv->xsize - x - VIDEO_FONT_WIDTH - 1) *
+		VNBYTES(vid_priv->bpix);
+
+	for (row = 0; row < VIDEO_FONT_HEIGHT; row++) {
+		uchar bits = video_fontdata[ch * VIDEO_FONT_HEIGHT + row];
+
+		switch (vid_priv->bpix) {
+#ifdef CONFIG_VIDEO_BPP8
+		case VIDEO_BPP8: {
+			uint8_t *dst = line;
+
+			for (i = 0; i < VIDEO_FONT_WIDTH; i++) {
+				*dst-- = (bits & 0x80) ? vid_priv->colour_fg
+					: vid_priv->colour_bg;
+				bits <<= 1;
+			}
+			break;
+		}
+#endif
+#ifdef CONFIG_VIDEO_BPP16
+		case VIDEO_BPP16: {
+			uint16_t *dst = line;
+
+			for (i = 0; i < VIDEO_FONT_WIDTH; i++) {
+				*dst-- = (bits & 0x80) ? vid_priv->colour_fg
+					: vid_priv->colour_bg;
+				bits <<= 1;
+			}
+			break;
+		}
+#endif
+#ifdef CONFIG_VIDEO_BPP32
+		case VIDEO_BPP32: {
+			uint32_t *dst = line;
+
+			for (i = 0; i < VIDEO_FONT_WIDTH; i++) {
+				*dst-- = (bits & 0x80) ? vid_priv->colour_fg
+					: vid_priv->colour_bg;
+				bits <<= 1;
+			}
+			break;
+		}
+#endif
+		default:
+			return -ENOSYS;
+		}
+		line -= vid_priv->line_length;
+	}
+
+	return 0;
+}
+
+static int console_set_row_3(struct udevice *dev, uint row, int clr)
+{
+	struct video_priv *vid_priv = dev_get_uclass_priv(dev->parent);
+	int pbytes = VNBYTES(vid_priv->bpix);
+	void *line;
+	int i, j;
+
+	line = vid_priv->fb + row * VIDEO_FONT_HEIGHT * pbytes;
+	for (j = 0; j < vid_priv->ysize; j++) {
+		switch (vid_priv->bpix) {
+#ifdef CONFIG_VIDEO_BPP8
+		case VIDEO_BPP8: {
+			uint8_t *dst = line;
+
+			for (i = 0; i < VIDEO_FONT_HEIGHT; i++)
+				*dst++ = clr;
+			break;
+		}
+#endif
+#ifdef CONFIG_VIDEO_BPP16
+		case VIDEO_BPP16: {
+			uint16_t *dst = line;
+
+			for (i = 0; i < VIDEO_FONT_HEIGHT; i++)
+				*dst++ = clr;
+			break;
+		}
+#endif
+#ifdef CONFIG_VIDEO_BPP32
+		case VIDEO_BPP32: {
+			uint32_t *dst = line;
+
+			for (i = 0; i < VIDEO_FONT_HEIGHT; i++)
+				*dst++ = clr;
+			break;
+		}
+#endif
+		default:
+			return -ENOSYS;
+		}
+		line += vid_priv->line_length;
+	}
+
+	return 0;
+}
+
+static int console_move_rows_3(struct udevice *dev, uint rowdst, uint rowsrc,
+			       uint count)
+{
+	struct video_priv *vid_priv = dev_get_uclass_priv(dev->parent);
+	void *dst;
+	void *src;
+	int pbytes = VNBYTES(vid_priv->bpix);
+	int j;
+
+	dst = vid_priv->fb + rowdst * VIDEO_FONT_HEIGHT * pbytes;
+	src = vid_priv->fb + rowsrc * VIDEO_FONT_HEIGHT * pbytes;
+
+	for (j = 0; j < vid_priv->ysize; j++) {
+		memmove(dst, src, VIDEO_FONT_HEIGHT * pbytes * count);
+		src += vid_priv->line_length;
+		dst += vid_priv->line_length;
+	}
+
+	return 0;
+}
+
+static int console_putc_xy_3(struct udevice *dev, uint x, uint y, char ch)
+{
+	struct udevice *vid = dev->parent;
+	struct video_priv *vid_priv = dev_get_uclass_priv(vid);
+	int pbytes = VNBYTES(vid_priv->bpix);
+	int i, col;
+	int mask = 0x80;
+	void *line = vid_priv->fb + (vid_priv->ysize - x - 1) *
+		vid_priv->line_length + y * pbytes;
+	uchar *pfont = video_fontdata + ch * VIDEO_FONT_HEIGHT;
+
+	for (col = 0; col < VIDEO_FONT_HEIGHT; col++) {
+		switch (vid_priv->bpix) {
+#ifdef CONFIG_VIDEO_BPP8
+		case VIDEO_BPP8: {
+			uint8_t *dst = line;
+
+			for (i = 0; i < VIDEO_FONT_HEIGHT; i++) {
+				*dst++ = (pfont[i] & mask) ? vid_priv->colour_fg
+					: vid_priv->colour_bg;
+			}
+			break;
+		}
+#endif
+#ifdef CONFIG_VIDEO_BPP16
+		case VIDEO_BPP16: {
+			uint16_t *dst = line;
+
+			for (i = 0; i < VIDEO_FONT_HEIGHT; i++) {
+				*dst++ = (pfont[i] & mask) ? vid_priv->colour_fg
+					: vid_priv->colour_bg;
+			}
+			break;
+		}
+#endif
+#ifdef CONFIG_VIDEO_BPP32
+		case VIDEO_BPP32: {
+			uint32_t *dst = line;
+
+			for (i = 0; i < VIDEO_FONT_HEIGHT; i++) {
+				*dst++ = (pfont[i] & mask) ? vid_priv->colour_fg
+					: vid_priv->colour_bg;
+			}
+			break;
+		}
+#endif
+		default:
+			return -ENOSYS;
+		}
+		line -= vid_priv->line_length;
+		mask >>= 1;
+	}
+
+	return 0;
+}
+
+
+static int console_probe_1_3(struct udevice *dev)
+{
+	struct vidconsole_priv *priv = dev_get_uclass_priv(dev);
+	struct video_priv *vid_priv = dev_get_uclass_priv(dev->parent);
+
+	priv->cols = vid_priv->ysize / VIDEO_FONT_WIDTH;
+	priv->rows = vid_priv->xsize / VIDEO_FONT_HEIGHT;
+
+	return 0;
+}
+
+struct vidconsole_ops console_ops_1 = {
+	.putc_xy	= console_putc_xy_1,
+	.move_rows	= console_move_rows_1,
+	.set_row	= console_set_row_1,
+};
+
+struct vidconsole_ops console_ops_2 = {
+	.putc_xy	= console_putc_xy_2,
+	.move_rows	= console_move_rows_2,
+	.set_row	= console_set_row_2,
+};
+
+struct vidconsole_ops console_ops_3 = {
+	.putc_xy	= console_putc_xy_3,
+	.move_rows	= console_move_rows_3,
+	.set_row	= console_set_row_3,
+};
+
+U_BOOT_DRIVER(vidconsole_1) = {
+	.name	= "vidconsole1",
+	.id	= UCLASS_VIDEO_CONSOLE,
+	.ops	= &console_ops_1,
+	.probe	= console_probe_1_3,
+};
+
+U_BOOT_DRIVER(vidconsole_2) = {
+	.name	= "vidconsole2",
+	.id	= UCLASS_VIDEO_CONSOLE,
+	.ops	= &console_ops_2,
+};
+
+U_BOOT_DRIVER(vidconsole_3) = {
+	.name	= "vidconsole3",
+	.id	= UCLASS_VIDEO_CONSOLE,
+	.ops	= &console_ops_3,
+	.probe	= console_probe_1_3,
+};