[media] gscaler: Add new driver for generic scaler

This patch adds support for G-Scaler (Generic Scaler) device which is a
new device for scaling and color space conversion on EXYNOS5 SoCs. This
patch adds the code for register definitions and register operations.

This device supports the followings as key feature.
 1) Input image format
   - RGB888/565, YUV422 1P/2P, YUV420 2P/3P, TILE
 2) Output image format
   - RGB888/565, YUV422 1P/2P, YUV420 2P/3P, YUV444
 3) Input rotation
   - 0/90/180/270 degree, X/Y Flip
 4) Scale ratio
   - 1/16 scale down to 8 scale up
 5) CSC
   - RGB to YUV / YUV to RGB
 6) Size
   - 2048 x 2048 for tile or rotation
   - 4800 x 3344 other case
Signed-off-by: Hynwoong Kim <khw0178.kim@samsung.com>
Signed-off-by: Sungchun Kang <sungchun.kang@samsung.com>
Signed-off-by: Shaik Ameer Basha <shaik.ameer@samsung.com>
Reviewed-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

drivers/media/platform/exynos-gsc/gsc-regs.h

+/*
+ * Copyright (c) 2011 - 2012 Samsung Electronics Co., Ltd.
+ *		http://www.samsung.com
+ *
+ * Register definition file for Samsung G-Scaler driver
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#ifndef REGS_GSC_H_
+#define REGS_GSC_H_
+
+/* G-Scaler enable */
+#define GSC_ENABLE			0x00
+#define GSC_ENABLE_OP_STATUS		(1 << 2)
+#define GSC_ENABLE_SFR_UPDATE		(1 << 1)
+#define GSC_ENABLE_ON			(1 << 0)
+
+/* G-Scaler S/W reset */
+#define GSC_SW_RESET			0x04
+#define GSC_SW_RESET_SRESET		(1 << 0)
+
+/* G-Scaler IRQ */
+#define GSC_IRQ				0x08
+#define GSC_IRQ_STATUS_OR_IRQ		(1 << 17)
+#define GSC_IRQ_STATUS_FRM_DONE_IRQ	(1 << 16)
+#define GSC_IRQ_FRMDONE_MASK		(1 << 1)
+#define GSC_IRQ_ENABLE			(1 << 0)
+
+/* G-Scaler input control */
+#define GSC_IN_CON			0x10
+#define GSC_IN_ROT_MASK			(7 << 16)
+#define GSC_IN_ROT_270			(7 << 16)
+#define GSC_IN_ROT_90_YFLIP		(6 << 16)
+#define GSC_IN_ROT_90_XFLIP		(5 << 16)
+#define GSC_IN_ROT_90			(4 << 16)
+#define GSC_IN_ROT_180			(3 << 16)
+#define GSC_IN_ROT_YFLIP		(2 << 16)
+#define GSC_IN_ROT_XFLIP		(1 << 16)
+#define GSC_IN_RGB_TYPE_MASK		(3 << 14)
+#define GSC_IN_RGB_HD_WIDE		(3 << 14)
+#define GSC_IN_RGB_HD_NARROW		(2 << 14)
+#define GSC_IN_RGB_SD_WIDE		(1 << 14)
+#define GSC_IN_RGB_SD_NARROW		(0 << 14)
+#define GSC_IN_YUV422_1P_ORDER_MASK	(1 << 13)
+#define GSC_IN_YUV422_1P_ORDER_LSB_Y	(0 << 13)
+#define GSC_IN_YUV422_1P_OEDER_LSB_C	(1 << 13)
+#define GSC_IN_CHROMA_ORDER_MASK	(1 << 12)
+#define GSC_IN_CHROMA_ORDER_CBCR	(0 << 12)
+#define GSC_IN_CHROMA_ORDER_CRCB	(1 << 12)
+#define GSC_IN_FORMAT_MASK		(7 << 8)
+#define GSC_IN_XRGB8888			(0 << 8)
+#define GSC_IN_RGB565			(1 << 8)
+#define GSC_IN_YUV420_2P		(2 << 8)
+#define GSC_IN_YUV420_3P		(3 << 8)
+#define GSC_IN_YUV422_1P		(4 << 8)
+#define GSC_IN_YUV422_2P		(5 << 8)
+#define GSC_IN_YUV422_3P		(6 << 8)
+#define GSC_IN_TILE_TYPE_MASK		(1 << 4)
+#define GSC_IN_TILE_C_16x8		(0 << 4)
+#define GSC_IN_TILE_MODE		(1 << 3)
+#define GSC_IN_LOCAL_SEL_MASK		(3 << 1)
+#define GSC_IN_PATH_MASK		(1 << 0)
+#define GSC_IN_PATH_MEMORY		(0 << 0)
+
+/* G-Scaler source image size */
+#define GSC_SRCIMG_SIZE			0x14
+#define GSC_SRCIMG_HEIGHT(x)		((x) << 16)
+#define GSC_SRCIMG_WIDTH(x)		((x) << 0)
+
+/* G-Scaler source image offset */
+#define GSC_SRCIMG_OFFSET		0x18
+#define GSC_SRCIMG_OFFSET_Y(x)		((x) << 16)
+#define GSC_SRCIMG_OFFSET_X(x)		((x) << 0)
+
+/* G-Scaler cropped source image size */
+#define GSC_CROPPED_SIZE		0x1c
+#define GSC_CROPPED_HEIGHT(x)		((x) << 16)
+#define GSC_CROPPED_WIDTH(x)		((x) << 0)
+
+/* G-Scaler output control */
+#define GSC_OUT_CON			0x20
+#define GSC_OUT_GLOBAL_ALPHA_MASK	(0xff << 24)
+#define GSC_OUT_GLOBAL_ALPHA(x)		((x) << 24)
+#define GSC_OUT_RGB_TYPE_MASK		(3 << 10)
+#define GSC_OUT_RGB_HD_NARROW		(3 << 10)
+#define GSC_OUT_RGB_HD_WIDE		(2 << 10)
+#define GSC_OUT_RGB_SD_NARROW		(1 << 10)
+#define GSC_OUT_RGB_SD_WIDE		(0 << 10)
+#define GSC_OUT_YUV422_1P_ORDER_MASK	(1 << 9)
+#define GSC_OUT_YUV422_1P_ORDER_LSB_Y	(0 << 9)
+#define GSC_OUT_YUV422_1P_OEDER_LSB_C	(1 << 9)
+#define GSC_OUT_CHROMA_ORDER_MASK	(1 << 8)
+#define GSC_OUT_CHROMA_ORDER_CBCR	(0 << 8)
+#define GSC_OUT_CHROMA_ORDER_CRCB	(1 << 8)
+#define GSC_OUT_FORMAT_MASK		(7 << 4)
+#define GSC_OUT_XRGB8888		(0 << 4)
+#define GSC_OUT_RGB565			(1 << 4)
+#define GSC_OUT_YUV420_2P		(2 << 4)
+#define GSC_OUT_YUV420_3P		(3 << 4)
+#define GSC_OUT_YUV422_1P		(4 << 4)
+#define GSC_OUT_YUV422_2P		(5 << 4)
+#define GSC_OUT_YUV444			(7 << 4)
+#define GSC_OUT_TILE_TYPE_MASK		(1 << 2)
+#define GSC_OUT_TILE_C_16x8		(0 << 2)
+#define GSC_OUT_TILE_MODE		(1 << 1)
+#define GSC_OUT_PATH_MASK		(1 << 0)
+#define GSC_OUT_PATH_LOCAL		(1 << 0)
+#define GSC_OUT_PATH_MEMORY		(0 << 0)
+
+/* G-Scaler scaled destination image size */
+#define GSC_SCALED_SIZE			0x24
+#define GSC_SCALED_HEIGHT(x)		((x) << 16)
+#define GSC_SCALED_WIDTH(x)		((x) << 0)
+
+/* G-Scaler pre scale ratio */
+#define GSC_PRE_SCALE_RATIO		0x28
+#define GSC_PRESC_SHFACTOR(x)		((x) << 28)
+#define GSC_PRESC_V_RATIO(x)		((x) << 16)
+#define GSC_PRESC_H_RATIO(x)		((x) << 0)
+
+/* G-Scaler main scale horizontal ratio */
+#define GSC_MAIN_H_RATIO		0x2c
+#define GSC_MAIN_H_RATIO_VALUE(x)	((x) << 0)
+
+/* G-Scaler main scale vertical ratio */
+#define GSC_MAIN_V_RATIO		0x30
+#define GSC_MAIN_V_RATIO_VALUE(x)	((x) << 0)
+
+/* G-Scaler destination image size */
+#define GSC_DSTIMG_SIZE			0x40
+#define GSC_DSTIMG_HEIGHT(x)		((x) << 16)
+#define GSC_DSTIMG_WIDTH(x)		((x) << 0)
+
+/* G-Scaler destination image offset */
+#define GSC_DSTIMG_OFFSET		0x44
+#define GSC_DSTIMG_OFFSET_Y(x)		((x) << 16)
+#define GSC_DSTIMG_OFFSET_X(x)		((x) << 0)
+
+/* G-Scaler input y address mask */
+#define GSC_IN_BASE_ADDR_Y_MASK		0x4c
+/* G-Scaler input y base address */
+#define GSC_IN_BASE_ADDR_Y(n)		(0x50 + (n) * 0x4)
+
+/* G-Scaler input cb address mask */
+#define GSC_IN_BASE_ADDR_CB_MASK	0x7c
+/* G-Scaler input cb base address */
+#define GSC_IN_BASE_ADDR_CB(n)		(0x80 + (n) * 0x4)
+
+/* G-Scaler input cr address mask */
+#define GSC_IN_BASE_ADDR_CR_MASK	0xac
+/* G-Scaler input cr base address */
+#define GSC_IN_BASE_ADDR_CR(n)		(0xb0 + (n) * 0x4)
+
+/* G-Scaler output y address mask */
+#define GSC_OUT_BASE_ADDR_Y_MASK	0x10c
+/* G-Scaler output y base address */
+#define GSC_OUT_BASE_ADDR_Y(n)		(0x110 + (n) * 0x4)
+
+/* G-Scaler output cb address mask */
+#define GSC_OUT_BASE_ADDR_CB_MASK	0x15c
+/* G-Scaler output cb base address */
+#define GSC_OUT_BASE_ADDR_CB(n)		(0x160 + (n) * 0x4)
+
+/* G-Scaler output cr address mask */
+#define GSC_OUT_BASE_ADDR_CR_MASK	0x1ac
+/* G-Scaler output cr base address */
+#define GSC_OUT_BASE_ADDR_CR(n)		(0x1b0 + (n) * 0x4)
+
+#endif /* REGS_GSC_H_ */