1 files changed, 775 insertions, 0 deletions

diff --git a/drivers/media/platform/s5p-fimc/fimc-reg.c b/drivers/media/platform/s5p-fimc/fimc-reg.c
new file mode 100644
index 000000000000..0e3eb9ce4f98
--- /dev/null
+++ b/drivers/media/platform/s5p-fimc/fimc-reg.c
@@ -0,0 +1,775 @@
+/*
+ * Register interface file for Samsung Camera Interface (FIMC) driver
+ *
+ * Copyright (C) 2010 - 2012 Samsung Electronics Co., Ltd.
+ * Sylwester Nawrocki, <s.nawrocki@samsung.com>
+ *
+ * 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.
+*/
+
+#include <linux/io.h>
+#include <linux/delay.h>
+#include <media/s5p_fimc.h>
+
+#include "fimc-reg.h"
+#include "fimc-core.h"
+
+
+void fimc_hw_reset(struct fimc_dev *dev)
+{
+	u32 cfg;
+
+	cfg = readl(dev->regs + FIMC_REG_CISRCFMT);
+	cfg |= FIMC_REG_CISRCFMT_ITU601_8BIT;
+	writel(cfg, dev->regs + FIMC_REG_CISRCFMT);
+
+	/* Software reset. */
+	cfg = readl(dev->regs + FIMC_REG_CIGCTRL);
+	cfg |= (FIMC_REG_CIGCTRL_SWRST | FIMC_REG_CIGCTRL_IRQ_LEVEL);
+	writel(cfg, dev->regs + FIMC_REG_CIGCTRL);
+	udelay(10);
+
+	cfg = readl(dev->regs + FIMC_REG_CIGCTRL);
+	cfg &= ~FIMC_REG_CIGCTRL_SWRST;
+	writel(cfg, dev->regs + FIMC_REG_CIGCTRL);
+
+	if (dev->variant->out_buf_count > 4)
+		fimc_hw_set_dma_seq(dev, 0xF);
+}
+
+static u32 fimc_hw_get_in_flip(struct fimc_ctx *ctx)
+{
+	u32 flip = FIMC_REG_MSCTRL_FLIP_NORMAL;
+
+	if (ctx->hflip)
+		flip = FIMC_REG_MSCTRL_FLIP_X_MIRROR;
+	if (ctx->vflip)
+		flip = FIMC_REG_MSCTRL_FLIP_Y_MIRROR;
+
+	if (ctx->rotation <= 90)
+		return flip;
+
+	return (flip ^ FIMC_REG_MSCTRL_FLIP_180) & FIMC_REG_MSCTRL_FLIP_180;
+}
+
+static u32 fimc_hw_get_target_flip(struct fimc_ctx *ctx)
+{
+	u32 flip = FIMC_REG_CITRGFMT_FLIP_NORMAL;
+
+	if (ctx->hflip)
+		flip |= FIMC_REG_CITRGFMT_FLIP_X_MIRROR;
+	if (ctx->vflip)
+		flip |= FIMC_REG_CITRGFMT_FLIP_Y_MIRROR;
+
+	if (ctx->rotation <= 90)
+		return flip;
+
+	return (flip ^ FIMC_REG_CITRGFMT_FLIP_180) & FIMC_REG_CITRGFMT_FLIP_180;
+}
+
+void fimc_hw_set_rotation(struct fimc_ctx *ctx)
+{
+	u32 cfg, flip;
+	struct fimc_dev *dev = ctx->fimc_dev;
+
+	cfg = readl(dev->regs + FIMC_REG_CITRGFMT);
+	cfg &= ~(FIMC_REG_CITRGFMT_INROT90 | FIMC_REG_CITRGFMT_OUTROT90 |
+		 FIMC_REG_CITRGFMT_FLIP_180);
+
+	/*
+	 * The input and output rotator cannot work simultaneously.
+	 * Use the output rotator in output DMA mode or the input rotator
+	 * in direct fifo output mode.
+	 */
+	if (ctx->rotation == 90 || ctx->rotation == 270) {
+		if (ctx->out_path == FIMC_IO_LCDFIFO)
+			cfg |= FIMC_REG_CITRGFMT_INROT90;
+		else
+			cfg |= FIMC_REG_CITRGFMT_OUTROT90;
+	}
+
+	if (ctx->out_path == FIMC_IO_DMA) {
+		cfg |= fimc_hw_get_target_flip(ctx);
+		writel(cfg, dev->regs + FIMC_REG_CITRGFMT);
+	} else {
+		/* LCD FIFO path */
+		flip = readl(dev->regs + FIMC_REG_MSCTRL);
+		flip &= ~FIMC_REG_MSCTRL_FLIP_MASK;
+		flip |= fimc_hw_get_in_flip(ctx);
+		writel(flip, dev->regs + FIMC_REG_MSCTRL);
+	}
+}
+
+void fimc_hw_set_target_format(struct fimc_ctx *ctx)
+{
+	u32 cfg;
+	struct fimc_dev *dev = ctx->fimc_dev;
+	struct fimc_frame *frame = &ctx->d_frame;
+
+	dbg("w= %d, h= %d color: %d", frame->width,
+	    frame->height, frame->fmt->color);
+
+	cfg = readl(dev->regs + FIMC_REG_CITRGFMT);
+	cfg &= ~(FIMC_REG_CITRGFMT_FMT_MASK | FIMC_REG_CITRGFMT_HSIZE_MASK |
+		 FIMC_REG_CITRGFMT_VSIZE_MASK);
+
+	switch (frame->fmt->color) {
+	case FIMC_FMT_RGB444...FIMC_FMT_RGB888:
+		cfg |= FIMC_REG_CITRGFMT_RGB;
+		break;
+	case FIMC_FMT_YCBCR420:
+		cfg |= FIMC_REG_CITRGFMT_YCBCR420;
+		break;
+	case FIMC_FMT_YCBYCR422...FIMC_FMT_CRYCBY422:
+		if (frame->fmt->colplanes == 1)
+			cfg |= FIMC_REG_CITRGFMT_YCBCR422_1P;
+		else
+			cfg |= FIMC_REG_CITRGFMT_YCBCR422;
+		break;
+	default:
+		break;
+	}
+
+	if (ctx->rotation == 90 || ctx->rotation == 270)
+		cfg |= (frame->height << 16) | frame->width;
+	else
+		cfg |= (frame->width << 16) | frame->height;
+
+	writel(cfg, dev->regs + FIMC_REG_CITRGFMT);
+
+	cfg = readl(dev->regs + FIMC_REG_CITAREA);
+	cfg &= ~FIMC_REG_CITAREA_MASK;
+	cfg |= (frame->width * frame->height);
+	writel(cfg, dev->regs + FIMC_REG_CITAREA);
+}
+
+static void fimc_hw_set_out_dma_size(struct fimc_ctx *ctx)
+{
+	struct fimc_dev *dev = ctx->fimc_dev;
+	struct fimc_frame *frame = &ctx->d_frame;
+	u32 cfg;
+
+	cfg = (frame->f_height << 16) | frame->f_width;
+	writel(cfg, dev->regs + FIMC_REG_ORGOSIZE);
+
+	/* Select color space conversion equation (HD/SD size).*/
+	cfg = readl(dev->regs + FIMC_REG_CIGCTRL);
+	if (frame->f_width >= 1280) /* HD */
+		cfg |= FIMC_REG_CIGCTRL_CSC_ITU601_709;
+	else	/* SD */
+		cfg &= ~FIMC_REG_CIGCTRL_CSC_ITU601_709;
+	writel(cfg, dev->regs + FIMC_REG_CIGCTRL);
+
+}
+
+void fimc_hw_set_out_dma(struct fimc_ctx *ctx)
+{
+	struct fimc_dev *dev = ctx->fimc_dev;
+	struct fimc_frame *frame = &ctx->d_frame;
+	struct fimc_dma_offset *offset = &frame->dma_offset;
+	struct fimc_fmt *fmt = frame->fmt;
+	u32 cfg;
+
+	/* Set the input dma offsets. */
+	cfg = (offset->y_v << 16) | offset->y_h;
+	writel(cfg, dev->regs + FIMC_REG_CIOYOFF);
+
+	cfg = (offset->cb_v << 16) | offset->cb_h;
+	writel(cfg, dev->regs + FIMC_REG_CIOCBOFF);
+
+	cfg = (offset->cr_v << 16) | offset->cr_h;
+	writel(cfg, dev->regs + FIMC_REG_CIOCROFF);
+
+	fimc_hw_set_out_dma_size(ctx);
+
+	/* Configure chroma components order. */
+	cfg = readl(dev->regs + FIMC_REG_CIOCTRL);
+
+	cfg &= ~(FIMC_REG_CIOCTRL_ORDER2P_MASK |
+		 FIMC_REG_CIOCTRL_ORDER422_MASK |
+		 FIMC_REG_CIOCTRL_YCBCR_PLANE_MASK |
+		 FIMC_REG_CIOCTRL_RGB16FMT_MASK);
+
+	if (fmt->colplanes == 1)
+		cfg |= ctx->out_order_1p;
+	else if (fmt->colplanes == 2)
+		cfg |= ctx->out_order_2p | FIMC_REG_CIOCTRL_YCBCR_2PLANE;
+	else if (fmt->colplanes == 3)
+		cfg |= FIMC_REG_CIOCTRL_YCBCR_3PLANE;
+
+	if (fmt->color == FIMC_FMT_RGB565)
+		cfg |= FIMC_REG_CIOCTRL_RGB565;
+	else if (fmt->color == FIMC_FMT_RGB555)
+		cfg |= FIMC_REG_CIOCTRL_ARGB1555;
+	else if (fmt->color == FIMC_FMT_RGB444)
+		cfg |= FIMC_REG_CIOCTRL_ARGB4444;
+
+	writel(cfg, dev->regs + FIMC_REG_CIOCTRL);
+}
+
+static void fimc_hw_en_autoload(struct fimc_dev *dev, int enable)
+{
+	u32 cfg = readl(dev->regs + FIMC_REG_ORGISIZE);
+	if (enable)
+		cfg |= FIMC_REG_CIREAL_ISIZE_AUTOLOAD_EN;
+	else
+		cfg &= ~FIMC_REG_CIREAL_ISIZE_AUTOLOAD_EN;
+	writel(cfg, dev->regs + FIMC_REG_ORGISIZE);
+}
+
+void fimc_hw_en_lastirq(struct fimc_dev *dev, int enable)
+{
+	u32 cfg = readl(dev->regs + FIMC_REG_CIOCTRL);
+	if (enable)
+		cfg |= FIMC_REG_CIOCTRL_LASTIRQ_ENABLE;
+	else
+		cfg &= ~FIMC_REG_CIOCTRL_LASTIRQ_ENABLE;
+	writel(cfg, dev->regs + FIMC_REG_CIOCTRL);
+}
+
+void fimc_hw_set_prescaler(struct fimc_ctx *ctx)
+{
+	struct fimc_dev *dev =  ctx->fimc_dev;
+	struct fimc_scaler *sc = &ctx->scaler;
+	u32 cfg, shfactor;
+
+	shfactor = 10 - (sc->hfactor + sc->vfactor);
+	cfg = shfactor << 28;
+
+	cfg |= (sc->pre_hratio << 16) | sc->pre_vratio;
+	writel(cfg, dev->regs + FIMC_REG_CISCPRERATIO);
+
+	cfg = (sc->pre_dst_width << 16) | sc->pre_dst_height;
+	writel(cfg, dev->regs + FIMC_REG_CISCPREDST);
+}
+
+static void fimc_hw_set_scaler(struct fimc_ctx *ctx)
+{
+	struct fimc_dev *dev = ctx->fimc_dev;
+	struct fimc_scaler *sc = &ctx->scaler;
+	struct fimc_frame *src_frame = &ctx->s_frame;
+	struct fimc_frame *dst_frame = &ctx->d_frame;
+
+	u32 cfg = readl(dev->regs + FIMC_REG_CISCCTRL);
+
+	cfg &= ~(FIMC_REG_CISCCTRL_CSCR2Y_WIDE | FIMC_REG_CISCCTRL_CSCY2R_WIDE |
+		 FIMC_REG_CISCCTRL_SCALEUP_H | FIMC_REG_CISCCTRL_SCALEUP_V |
+		 FIMC_REG_CISCCTRL_SCALERBYPASS | FIMC_REG_CISCCTRL_ONE2ONE |
+		 FIMC_REG_CISCCTRL_INRGB_FMT_MASK | FIMC_REG_CISCCTRL_OUTRGB_FMT_MASK |
+		 FIMC_REG_CISCCTRL_INTERLACE | FIMC_REG_CISCCTRL_RGB_EXT);
+
+	if (!(ctx->flags & FIMC_COLOR_RANGE_NARROW))
+		cfg |= (FIMC_REG_CISCCTRL_CSCR2Y_WIDE |
+			FIMC_REG_CISCCTRL_CSCY2R_WIDE);
+
+	if (!sc->enabled)
+		cfg |= FIMC_REG_CISCCTRL_SCALERBYPASS;
+
+	if (sc->scaleup_h)
+		cfg |= FIMC_REG_CISCCTRL_SCALEUP_H;
+
+	if (sc->scaleup_v)
+		cfg |= FIMC_REG_CISCCTRL_SCALEUP_V;
+
+	if (sc->copy_mode)
+		cfg |= FIMC_REG_CISCCTRL_ONE2ONE;
+
+	if (ctx->in_path == FIMC_IO_DMA) {
+		switch (src_frame->fmt->color) {
+		case FIMC_FMT_RGB565:
+			cfg |= FIMC_REG_CISCCTRL_INRGB_FMT_RGB565;
+			break;
+		case FIMC_FMT_RGB666:
+			cfg |= FIMC_REG_CISCCTRL_INRGB_FMT_RGB666;
+			break;
+		case FIMC_FMT_RGB888:
+			cfg |= FIMC_REG_CISCCTRL_INRGB_FMT_RGB888;
+			break;
+		}
+	}
+
+	if (ctx->out_path == FIMC_IO_DMA) {
+		u32 color = dst_frame->fmt->color;
+
+		if (color >= FIMC_FMT_RGB444 && color <= FIMC_FMT_RGB565)
+			cfg |= FIMC_REG_CISCCTRL_OUTRGB_FMT_RGB565;
+		else if (color == FIMC_FMT_RGB666)
+			cfg |= FIMC_REG_CISCCTRL_OUTRGB_FMT_RGB666;
+		else if (color == FIMC_FMT_RGB888)
+			cfg |= FIMC_REG_CISCCTRL_OUTRGB_FMT_RGB888;
+	} else {
+		cfg |= FIMC_REG_CISCCTRL_OUTRGB_FMT_RGB888;
+
+		if (ctx->flags & FIMC_SCAN_MODE_INTERLACED)
+			cfg |= FIMC_REG_CISCCTRL_INTERLACE;
+	}
+
+	writel(cfg, dev->regs + FIMC_REG_CISCCTRL);
+}
+
+void fimc_hw_set_mainscaler(struct fimc_ctx *ctx)
+{
+	struct fimc_dev *dev = ctx->fimc_dev;
+	struct fimc_variant *variant = dev->variant;
+	struct fimc_scaler *sc = &ctx->scaler;
+	u32 cfg;
+
+	dbg("main_hratio= 0x%X  main_vratio= 0x%X",
+	    sc->main_hratio, sc->main_vratio);
+
+	fimc_hw_set_scaler(ctx);
+
+	cfg = readl(dev->regs + FIMC_REG_CISCCTRL);
+	cfg &= ~(FIMC_REG_CISCCTRL_MHRATIO_MASK |
+		 FIMC_REG_CISCCTRL_MVRATIO_MASK);
+
+	if (variant->has_mainscaler_ext) {
+		cfg |= FIMC_REG_CISCCTRL_MHRATIO_EXT(sc->main_hratio);
+		cfg |= FIMC_REG_CISCCTRL_MVRATIO_EXT(sc->main_vratio);
+		writel(cfg, dev->regs + FIMC_REG_CISCCTRL);
+
+		cfg = readl(dev->regs + FIMC_REG_CIEXTEN);
+
+		cfg &= ~(FIMC_REG_CIEXTEN_MVRATIO_EXT_MASK |
+			 FIMC_REG_CIEXTEN_MHRATIO_EXT_MASK);
+		cfg |= FIMC_REG_CIEXTEN_MHRATIO_EXT(sc->main_hratio);
+		cfg |= FIMC_REG_CIEXTEN_MVRATIO_EXT(sc->main_vratio);
+		writel(cfg, dev->regs + FIMC_REG_CIEXTEN);
+	} else {
+		cfg |= FIMC_REG_CISCCTRL_MHRATIO(sc->main_hratio);
+		cfg |= FIMC_REG_CISCCTRL_MVRATIO(sc->main_vratio);
+		writel(cfg, dev->regs + FIMC_REG_CISCCTRL);
+	}
+}
+
+void fimc_hw_en_capture(struct fimc_ctx *ctx)
+{
+	struct fimc_dev *dev = ctx->fimc_dev;
+
+	u32 cfg = readl(dev->regs + FIMC_REG_CIIMGCPT);
+
+	if (ctx->out_path == FIMC_IO_DMA) {
+		/* one shot mode */
+		cfg |= FIMC_REG_CIIMGCPT_CPT_FREN_ENABLE |
+			FIMC_REG_CIIMGCPT_IMGCPTEN;
+	} else {
+		/* Continuous frame capture mode (freerun). */
+		cfg &= ~(FIMC_REG_CIIMGCPT_CPT_FREN_ENABLE |
+			 FIMC_REG_CIIMGCPT_CPT_FRMOD_CNT);
+		cfg |= FIMC_REG_CIIMGCPT_IMGCPTEN;
+	}
+
+	if (ctx->scaler.enabled)
+		cfg |= FIMC_REG_CIIMGCPT_IMGCPTEN_SC;
+
+	cfg |= FIMC_REG_CIIMGCPT_IMGCPTEN;
+	writel(cfg, dev->regs + FIMC_REG_CIIMGCPT);
+}
+
+void fimc_hw_set_effect(struct fimc_ctx *ctx)
+{
+	struct fimc_dev *dev = ctx->fimc_dev;
+	struct fimc_effect *effect = &ctx->effect;
+	u32 cfg = 0;
+
+	if (effect->type != FIMC_REG_CIIMGEFF_FIN_BYPASS) {
+		cfg |= FIMC_REG_CIIMGEFF_IE_SC_AFTER |
+			FIMC_REG_CIIMGEFF_IE_ENABLE;
+		cfg |= effect->type;
+		if (effect->type == FIMC_REG_CIIMGEFF_FIN_ARBITRARY)
+			cfg |= (effect->pat_cb << 13) | effect->pat_cr;
+	}
+
+	writel(cfg, dev->regs + FIMC_REG_CIIMGEFF);
+}
+
+void fimc_hw_set_rgb_alpha(struct fimc_ctx *ctx)
+{
+	struct fimc_dev *dev = ctx->fimc_dev;
+	struct fimc_frame *frame = &ctx->d_frame;
+	u32 cfg;
+
+	if (!(frame->fmt->flags & FMT_HAS_ALPHA))
+		return;
+
+	cfg = readl(dev->regs + FIMC_REG_CIOCTRL);
+	cfg &= ~FIMC_REG_CIOCTRL_ALPHA_OUT_MASK;
+	cfg |= (frame->alpha << 4);
+	writel(cfg, dev->regs + FIMC_REG_CIOCTRL);
+}
+
+static void fimc_hw_set_in_dma_size(struct fimc_ctx *ctx)
+{
+	struct fimc_dev *dev = ctx->fimc_dev;
+	struct fimc_frame *frame = &ctx->s_frame;
+	u32 cfg_o = 0;
+	u32 cfg_r = 0;
+
+	if (FIMC_IO_LCDFIFO == ctx->out_path)
+		cfg_r |= FIMC_REG_CIREAL_ISIZE_AUTOLOAD_EN;
+
+	cfg_o |= (frame->f_height << 16) | frame->f_width;
+	cfg_r |= (frame->height << 16) | frame->width;
+
+	writel(cfg_o, dev->regs + FIMC_REG_ORGISIZE);
+	writel(cfg_r, dev->regs + FIMC_REG_CIREAL_ISIZE);
+}
+
+void fimc_hw_set_in_dma(struct fimc_ctx *ctx)
+{
+	struct fimc_dev *dev = ctx->fimc_dev;
+	struct fimc_frame *frame = &ctx->s_frame;
+	struct fimc_dma_offset *offset = &frame->dma_offset;
+	u32 cfg;
+
+	/* Set the pixel offsets. */
+	cfg = (offset->y_v << 16) | offset->y_h;
+	writel(cfg, dev->regs + FIMC_REG_CIIYOFF);
+
+	cfg = (offset->cb_v << 16) | offset->cb_h;
+	writel(cfg, dev->regs + FIMC_REG_CIICBOFF);
+
+	cfg = (offset->cr_v << 16) | offset->cr_h;
+	writel(cfg, dev->regs + FIMC_REG_CIICROFF);
+
+	/* Input original and real size. */
+	fimc_hw_set_in_dma_size(ctx);
+
+	/* Use DMA autoload only in FIFO mode. */
+	fimc_hw_en_autoload(dev, ctx->out_path == FIMC_IO_LCDFIFO);
+
+	/* Set the input DMA to process single frame only. */
+	cfg = readl(dev->regs + FIMC_REG_MSCTRL);
+	cfg &= ~(FIMC_REG_MSCTRL_INFORMAT_MASK
+		 | FIMC_REG_MSCTRL_IN_BURST_COUNT_MASK
+		 | FIMC_REG_MSCTRL_INPUT_MASK
+		 | FIMC_REG_MSCTRL_C_INT_IN_MASK
+		 | FIMC_REG_MSCTRL_2P_IN_ORDER_MASK);
+
+	cfg |= (FIMC_REG_MSCTRL_IN_BURST_COUNT(4)
+		| FIMC_REG_MSCTRL_INPUT_MEMORY
+		| FIMC_REG_MSCTRL_FIFO_CTRL_FULL);
+
+	switch (frame->fmt->color) {
+	case FIMC_FMT_RGB565...FIMC_FMT_RGB888:
+		cfg |= FIMC_REG_MSCTRL_INFORMAT_RGB;
+		break;
+	case FIMC_FMT_YCBCR420:
+		cfg |= FIMC_REG_MSCTRL_INFORMAT_YCBCR420;
+
+		if (frame->fmt->colplanes == 2)
+			cfg |= ctx->in_order_2p | FIMC_REG_MSCTRL_C_INT_IN_2PLANE;
+		else
+			cfg |= FIMC_REG_MSCTRL_C_INT_IN_3PLANE;
+
+		break;
+	case FIMC_FMT_YCBYCR422...FIMC_FMT_CRYCBY422:
+		if (frame->fmt->colplanes == 1) {
+			cfg |= ctx->in_order_1p
+				| FIMC_REG_MSCTRL_INFORMAT_YCBCR422_1P;
+		} else {
+			cfg |= FIMC_REG_MSCTRL_INFORMAT_YCBCR422;
+
+			if (frame->fmt->colplanes == 2)
+				cfg |= ctx->in_order_2p
+					| FIMC_REG_MSCTRL_C_INT_IN_2PLANE;
+			else
+				cfg |= FIMC_REG_MSCTRL_C_INT_IN_3PLANE;
+		}
+		break;
+	default:
+		break;
+	}
+
+	writel(cfg, dev->regs + FIMC_REG_MSCTRL);
+
+	/* Input/output DMA linear/tiled mode. */
+	cfg = readl(dev->regs + FIMC_REG_CIDMAPARAM);
+	cfg &= ~FIMC_REG_CIDMAPARAM_TILE_MASK;
+
+	if (tiled_fmt(ctx->s_frame.fmt))
+		cfg |= FIMC_REG_CIDMAPARAM_R_64X32;
+
+	if (tiled_fmt(ctx->d_frame.fmt))
+		cfg |= FIMC_REG_CIDMAPARAM_W_64X32;
+
+	writel(cfg, dev->regs + FIMC_REG_CIDMAPARAM);
+}
+
+
+void fimc_hw_set_input_path(struct fimc_ctx *ctx)
+{
+	struct fimc_dev *dev = ctx->fimc_dev;
+
+	u32 cfg = readl(dev->regs + FIMC_REG_MSCTRL);
+	cfg &= ~FIMC_REG_MSCTRL_INPUT_MASK;
+
+	if (ctx->in_path == FIMC_IO_DMA)
+		cfg |= FIMC_REG_MSCTRL_INPUT_MEMORY;
+	else
+		cfg |= FIMC_REG_MSCTRL_INPUT_EXTCAM;
+
+	writel(cfg, dev->regs + FIMC_REG_MSCTRL);
+}
+
+void fimc_hw_set_output_path(struct fimc_ctx *ctx)
+{
+	struct fimc_dev *dev = ctx->fimc_dev;
+
+	u32 cfg = readl(dev->regs + FIMC_REG_CISCCTRL);
+	cfg &= ~FIMC_REG_CISCCTRL_LCDPATHEN_FIFO;
+	if (ctx->out_path == FIMC_IO_LCDFIFO)
+		cfg |= FIMC_REG_CISCCTRL_LCDPATHEN_FIFO;
+	writel(cfg, dev->regs + FIMC_REG_CISCCTRL);
+}
+
+void fimc_hw_set_input_addr(struct fimc_dev *dev, struct fimc_addr *paddr)
+{
+	u32 cfg = readl(dev->regs + FIMC_REG_CIREAL_ISIZE);
+	cfg |= FIMC_REG_CIREAL_ISIZE_ADDR_CH_DIS;
+	writel(cfg, dev->regs + FIMC_REG_CIREAL_ISIZE);
+
+	writel(paddr->y, dev->regs + FIMC_REG_CIIYSA(0));
+	writel(paddr->cb, dev->regs + FIMC_REG_CIICBSA(0));
+	writel(paddr->cr, dev->regs + FIMC_REG_CIICRSA(0));
+
+	cfg &= ~FIMC_REG_CIREAL_ISIZE_ADDR_CH_DIS;
+	writel(cfg, dev->regs + FIMC_REG_CIREAL_ISIZE);
+}
+
+void fimc_hw_set_output_addr(struct fimc_dev *dev,
+			     struct fimc_addr *paddr, int index)
+{
+	int i = (index == -1) ? 0 : index;
+	do {
+		writel(paddr->y, dev->regs + FIMC_REG_CIOYSA(i));
+		writel(paddr->cb, dev->regs + FIMC_REG_CIOCBSA(i));
+		writel(paddr->cr, dev->regs + FIMC_REG_CIOCRSA(i));
+		dbg("dst_buf[%d]: 0x%X, cb: 0x%X, cr: 0x%X",
+		    i, paddr->y, paddr->cb, paddr->cr);
+	} while (index == -1 && ++i < FIMC_MAX_OUT_BUFS);
+}
+
+int fimc_hw_set_camera_polarity(struct fimc_dev *fimc,
+				struct s5p_fimc_isp_info *cam)
+{
+	u32 cfg = readl(fimc->regs + FIMC_REG_CIGCTRL);
+
+	cfg &= ~(FIMC_REG_CIGCTRL_INVPOLPCLK | FIMC_REG_CIGCTRL_INVPOLVSYNC |
+		 FIMC_REG_CIGCTRL_INVPOLHREF | FIMC_REG_CIGCTRL_INVPOLHSYNC |
+		 FIMC_REG_CIGCTRL_INVPOLFIELD);
+
+	if (cam->flags & V4L2_MBUS_PCLK_SAMPLE_FALLING)
+		cfg |= FIMC_REG_CIGCTRL_INVPOLPCLK;
+
+	if (cam->flags & V4L2_MBUS_VSYNC_ACTIVE_LOW)
+		cfg |= FIMC_REG_CIGCTRL_INVPOLVSYNC;
+
+	if (cam->flags & V4L2_MBUS_HSYNC_ACTIVE_LOW)
+		cfg |= FIMC_REG_CIGCTRL_INVPOLHREF;
+
+	if (cam->flags & V4L2_MBUS_HSYNC_ACTIVE_LOW)
+		cfg |= FIMC_REG_CIGCTRL_INVPOLHSYNC;
+
+	if (cam->flags & V4L2_MBUS_FIELD_EVEN_LOW)
+		cfg |= FIMC_REG_CIGCTRL_INVPOLFIELD;
+
+	writel(cfg, fimc->regs + FIMC_REG_CIGCTRL);
+
+	return 0;
+}
+
+struct mbus_pixfmt_desc {
+	u32 pixelcode;
+	u32 cisrcfmt;
+	u16 bus_width;
+};
+
+static const struct mbus_pixfmt_desc pix_desc[] = {
+	{ V4L2_MBUS_FMT_YUYV8_2X8, FIMC_REG_CISRCFMT_ORDER422_YCBYCR, 8 },
+	{ V4L2_MBUS_FMT_YVYU8_2X8, FIMC_REG_CISRCFMT_ORDER422_YCRYCB, 8 },
+	{ V4L2_MBUS_FMT_VYUY8_2X8, FIMC_REG_CISRCFMT_ORDER422_CRYCBY, 8 },
+	{ V4L2_MBUS_FMT_UYVY8_2X8, FIMC_REG_CISRCFMT_ORDER422_CBYCRY, 8 },
+};
+
+int fimc_hw_set_camera_source(struct fimc_dev *fimc,
+			      struct s5p_fimc_isp_info *cam)
+{
+	struct fimc_frame *f = &fimc->vid_cap.ctx->s_frame;
+	u32 cfg = 0;
+	u32 bus_width;
+	int i;
+
+	if (cam->bus_type == FIMC_ITU_601 || cam->bus_type == FIMC_ITU_656) {
+		for (i = 0; i < ARRAY_SIZE(pix_desc); i++) {
+			if (fimc->vid_cap.mf.code == pix_desc[i].pixelcode) {
+				cfg = pix_desc[i].cisrcfmt;
+				bus_width = pix_desc[i].bus_width;
+				break;
+			}
+		}
+
+		if (i == ARRAY_SIZE(pix_desc)) {
+			v4l2_err(fimc->vid_cap.vfd,
+				 "Camera color format not supported: %d\n",
+				 fimc->vid_cap.mf.code);
+			return -EINVAL;
+		}
+
+		if (cam->bus_type == FIMC_ITU_601) {
+			if (bus_width == 8)
+				cfg |= FIMC_REG_CISRCFMT_ITU601_8BIT;
+			else if (bus_width == 16)
+				cfg |= FIMC_REG_CISRCFMT_ITU601_16BIT;
+		} /* else defaults to ITU-R BT.656 8-bit */
+	} else if (cam->bus_type == FIMC_MIPI_CSI2) {
+		if (fimc_fmt_is_jpeg(f->fmt->color))
+			cfg |= FIMC_REG_CISRCFMT_ITU601_8BIT;
+	}
+
+	cfg |= (f->o_width << 16) | f->o_height;
+	writel(cfg, fimc->regs + FIMC_REG_CISRCFMT);
+	return 0;
+}
+
+void fimc_hw_set_camera_offset(struct fimc_dev *fimc, struct fimc_frame *f)
+{
+	u32 hoff2, voff2;
+
+	u32 cfg = readl(fimc->regs + FIMC_REG_CIWDOFST);
+
+	cfg &= ~(FIMC_REG_CIWDOFST_HOROFF_MASK | FIMC_REG_CIWDOFST_VEROFF_MASK);
+	cfg |=  FIMC_REG_CIWDOFST_OFF_EN |
+		(f->offs_h << 16) | f->offs_v;
+
+	writel(cfg, fimc->regs + FIMC_REG_CIWDOFST);
+
+	/* See CIWDOFSTn register description in the datasheet for details. */
+	hoff2 = f->o_width - f->width - f->offs_h;
+	voff2 = f->o_height - f->height - f->offs_v;
+	cfg = (hoff2 << 16) | voff2;
+	writel(cfg, fimc->regs + FIMC_REG_CIWDOFST2);
+}
+
+int fimc_hw_set_camera_type(struct fimc_dev *fimc,
+			    struct s5p_fimc_isp_info *cam)
+{
+	u32 cfg, tmp;
+	struct fimc_vid_cap *vid_cap = &fimc->vid_cap;
+	u32 csis_data_alignment = 32;
+
+	cfg = readl(fimc->regs + FIMC_REG_CIGCTRL);
+
+	/* Select ITU B interface, disable Writeback path and test pattern. */
+	cfg &= ~(FIMC_REG_CIGCTRL_TESTPAT_MASK | FIMC_REG_CIGCTRL_SELCAM_ITU_A |
+		FIMC_REG_CIGCTRL_SELCAM_MIPI | FIMC_REG_CIGCTRL_CAMIF_SELWB |
+		FIMC_REG_CIGCTRL_SELCAM_MIPI_A | FIMC_REG_CIGCTRL_CAM_JPEG);
+
+	switch (cam->bus_type) {
+	case FIMC_MIPI_CSI2:
+		cfg |= FIMC_REG_CIGCTRL_SELCAM_MIPI;
+
+		if (cam->mux_id == 0)
+			cfg |= FIMC_REG_CIGCTRL_SELCAM_MIPI_A;
+
+		/* TODO: add remaining supported formats. */
+		switch (vid_cap->mf.code) {
+		case V4L2_MBUS_FMT_VYUY8_2X8:
+			tmp = FIMC_REG_CSIIMGFMT_YCBCR422_8BIT;
+			break;
+		case V4L2_MBUS_FMT_JPEG_1X8:
+			tmp = FIMC_REG_CSIIMGFMT_USER(1);
+			cfg |= FIMC_REG_CIGCTRL_CAM_JPEG;
+			break;
+		default:
+			v4l2_err(vid_cap->vfd,
+				 "Not supported camera pixel format: %#x\n",
+				 vid_cap->mf.code);
+			return -EINVAL;
+		}
+		tmp |= (csis_data_alignment == 32) << 8;
+
+		writel(tmp, fimc->regs + FIMC_REG_CSIIMGFMT);
+		break;
+	case FIMC_ITU_601...FIMC_ITU_656:
+		if (cam->mux_id == 0) /* ITU-A, ITU-B: 0, 1 */
+			cfg |= FIMC_REG_CIGCTRL_SELCAM_ITU_A;
+		break;
+	case FIMC_LCD_WB:
+		cfg |= FIMC_REG_CIGCTRL_CAMIF_SELWB;
+		break;
+	default:
+		v4l2_err(vid_cap->vfd, "Invalid camera bus type selected\n");
+		return -EINVAL;
+	}
+	writel(cfg, fimc->regs + FIMC_REG_CIGCTRL);
+
+	return 0;
+}
+
+void fimc_hw_clear_irq(struct fimc_dev *dev)
+{
+	u32 cfg = readl(dev->regs + FIMC_REG_CIGCTRL);
+	cfg |= FIMC_REG_CIGCTRL_IRQ_CLR;
+	writel(cfg, dev->regs + FIMC_REG_CIGCTRL);
+}
+
+void fimc_hw_enable_scaler(struct fimc_dev *dev, bool on)
+{
+	u32 cfg = readl(dev->regs + FIMC_REG_CISCCTRL);
+	if (on)
+		cfg |= FIMC_REG_CISCCTRL_SCALERSTART;
+	else
+		cfg &= ~FIMC_REG_CISCCTRL_SCALERSTART;
+	writel(cfg, dev->regs + FIMC_REG_CISCCTRL);
+}
+
+void fimc_hw_activate_input_dma(struct fimc_dev *dev, bool on)
+{
+	u32 cfg = readl(dev->regs + FIMC_REG_MSCTRL);
+	if (on)
+		cfg |= FIMC_REG_MSCTRL_ENVID;
+	else
+		cfg &= ~FIMC_REG_MSCTRL_ENVID;
+	writel(cfg, dev->regs + FIMC_REG_MSCTRL);
+}
+
+void fimc_hw_dis_capture(struct fimc_dev *dev)
+{
+	u32 cfg = readl(dev->regs + FIMC_REG_CIIMGCPT);
+	cfg &= ~(FIMC_REG_CIIMGCPT_IMGCPTEN | FIMC_REG_CIIMGCPT_IMGCPTEN_SC);
+	writel(cfg, dev->regs + FIMC_REG_CIIMGCPT);
+}
+
+/* Return an index to the buffer actually being written. */
+u32 fimc_hw_get_frame_index(struct fimc_dev *dev)
+{
+	u32 reg;
+
+	if (dev->variant->has_cistatus2) {
+		reg = readl(dev->regs + FIMC_REG_CISTATUS2) & 0x3F;
+		return reg > 0 ? --reg : reg;
+	}
+
+	reg = readl(dev->regs + FIMC_REG_CISTATUS);
+
+	return (reg & FIMC_REG_CISTATUS_FRAMECNT_MASK) >>
+		FIMC_REG_CISTATUS_FRAMECNT_SHIFT;
+}
+
+/* Locking: the caller holds fimc->slock */
+void fimc_activate_capture(struct fimc_ctx *ctx)
+{
+	fimc_hw_enable_scaler(ctx->fimc_dev, ctx->scaler.enabled);
+	fimc_hw_en_capture(ctx);
+}
+
+void fimc_deactivate_capture(struct fimc_dev *fimc)
+{
+	fimc_hw_en_lastirq(fimc, true);
+	fimc_hw_dis_capture(fimc);
+	fimc_hw_enable_scaler(fimc, false);
+	fimc_hw_en_lastirq(fimc, false);
+}