1 files changed, 606 insertions, 0 deletions

diff --git a/drivers/media/platform/s3c-camif/camif-regs.c b/drivers/media/platform/s3c-camif/camif-regs.c
new file mode 100644
index 000000000000..1a3b4fc05ec6
--- /dev/null
+++ b/drivers/media/platform/s3c-camif/camif-regs.c
@@ -0,0 +1,606 @@
+/*
+ * Samsung s3c24xx/s3c64xx SoC CAMIF driver
+ *
+ * Copyright (C) 2012 Sylwester Nawrocki <sylvester.nawrocki@gmail.com>
+ * Copyright (C) 2012 Tomasz Figa <tomasz.figa@gmail.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.
+*/
+#define pr_fmt(fmt) "%s:%d " fmt, __func__, __LINE__
+
+#include <linux/delay.h>
+#include "camif-regs.h"
+
+#define camif_write(_camif, _off, _val)	writel(_val, (_camif)->io_base + (_off))
+#define camif_read(_camif, _off)	readl((_camif)->io_base + (_off))
+
+void camif_hw_reset(struct camif_dev *camif)
+{
+	u32 cfg;
+
+	cfg = camif_read(camif, S3C_CAMIF_REG_CISRCFMT);
+	cfg |= CISRCFMT_ITU601_8BIT;
+	camif_write(camif, S3C_CAMIF_REG_CISRCFMT, cfg);
+
+	/* S/W reset */
+	cfg = camif_read(camif, S3C_CAMIF_REG_CIGCTRL);
+	cfg |= CIGCTRL_SWRST;
+	if (camif->variant->ip_revision == S3C6410_CAMIF_IP_REV)
+		cfg |= CIGCTRL_IRQ_LEVEL;
+	camif_write(camif, S3C_CAMIF_REG_CIGCTRL, cfg);
+	udelay(10);
+
+	cfg = camif_read(camif, S3C_CAMIF_REG_CIGCTRL);
+	cfg &= ~CIGCTRL_SWRST;
+	camif_write(camif, S3C_CAMIF_REG_CIGCTRL, cfg);
+	udelay(10);
+}
+
+void camif_hw_clear_pending_irq(struct camif_vp *vp)
+{
+	u32 cfg = camif_read(vp->camif, S3C_CAMIF_REG_CIGCTRL);
+	cfg |= CIGCTRL_IRQ_CLR(vp->id);
+	camif_write(vp->camif, S3C_CAMIF_REG_CIGCTRL, cfg);
+}
+
+/*
+ * Sets video test pattern (off, color bar, horizontal or vertical gradient).
+ * External sensor pixel clock must be active for the test pattern to work.
+ */
+void camif_hw_set_test_pattern(struct camif_dev *camif, unsigned int pattern)
+{
+	u32 cfg = camif_read(camif, S3C_CAMIF_REG_CIGCTRL);
+	cfg &= ~CIGCTRL_TESTPATTERN_MASK;
+	cfg |= (pattern << 27);
+	camif_write(camif, S3C_CAMIF_REG_CIGCTRL, cfg);
+}
+
+void camif_hw_set_effect(struct camif_dev *camif, unsigned int effect,
+			unsigned int cr, unsigned int cb)
+{
+	static const struct v4l2_control colorfx[] = {
+		{ V4L2_COLORFX_NONE,		CIIMGEFF_FIN_BYPASS },
+		{ V4L2_COLORFX_BW,		CIIMGEFF_FIN_ARBITRARY },
+		{ V4L2_COLORFX_SEPIA,		CIIMGEFF_FIN_ARBITRARY },
+		{ V4L2_COLORFX_NEGATIVE,	CIIMGEFF_FIN_NEGATIVE },
+		{ V4L2_COLORFX_ART_FREEZE,	CIIMGEFF_FIN_ARTFREEZE },
+		{ V4L2_COLORFX_EMBOSS,		CIIMGEFF_FIN_EMBOSSING },
+		{ V4L2_COLORFX_SILHOUETTE,	CIIMGEFF_FIN_SILHOUETTE },
+		{ V4L2_COLORFX_SET_CBCR,	CIIMGEFF_FIN_ARBITRARY },
+	};
+	unsigned int i, cfg;
+
+	for (i = 0; i < ARRAY_SIZE(colorfx); i++)
+		if (colorfx[i].id == effect)
+			break;
+
+	if (i == ARRAY_SIZE(colorfx))
+		return;
+
+	cfg = camif_read(camif, S3C_CAMIF_REG_CIIMGEFF(camif->vp->offset));
+	/* Set effect */
+	cfg &= ~CIIMGEFF_FIN_MASK;
+	cfg |= colorfx[i].value;
+	/* Set both paths */
+	if (camif->variant->ip_revision >= S3C6400_CAMIF_IP_REV) {
+		if (effect == V4L2_COLORFX_NONE)
+			cfg &= ~CIIMGEFF_IE_ENABLE_MASK;
+		else
+			cfg |= CIIMGEFF_IE_ENABLE_MASK;
+	}
+	cfg &= ~CIIMGEFF_PAT_CBCR_MASK;
+	cfg |= cr | (cb << 13);
+	camif_write(camif, S3C_CAMIF_REG_CIIMGEFF(camif->vp->offset), cfg);
+}
+
+static const u32 src_pixfmt_map[8][2] = {
+	{ V4L2_MBUS_FMT_YUYV8_2X8, CISRCFMT_ORDER422_YCBYCR },
+	{ V4L2_MBUS_FMT_YVYU8_2X8, CISRCFMT_ORDER422_YCRYCB },
+	{ V4L2_MBUS_FMT_UYVY8_2X8, CISRCFMT_ORDER422_CBYCRY },
+	{ V4L2_MBUS_FMT_VYUY8_2X8, CISRCFMT_ORDER422_CRYCBY },
+};
+
+/* Set camera input pixel format and resolution */
+void camif_hw_set_source_format(struct camif_dev *camif)
+{
+	struct v4l2_mbus_framefmt *mf = &camif->mbus_fmt;
+	unsigned int i = ARRAY_SIZE(src_pixfmt_map);
+	u32 cfg;
+
+	while (i-- >= 0) {
+		if (src_pixfmt_map[i][0] == mf->code)
+			break;
+	}
+
+	if (i == 0 && src_pixfmt_map[i][0] != mf->code) {
+		dev_err(camif->dev,
+			"Unsupported pixel code, falling back to %#08x\n",
+			src_pixfmt_map[i][0]);
+	}
+
+	cfg = camif_read(camif, S3C_CAMIF_REG_CISRCFMT);
+	cfg &= ~(CISRCFMT_ORDER422_MASK | CISRCFMT_SIZE_CAM_MASK);
+	cfg |= (mf->width << 16) | mf->height;
+	cfg |= src_pixfmt_map[i][1];
+	camif_write(camif, S3C_CAMIF_REG_CISRCFMT, cfg);
+}
+
+/* Set the camera host input window offsets (cropping) */
+void camif_hw_set_camera_crop(struct camif_dev *camif)
+{
+	struct v4l2_mbus_framefmt *mf = &camif->mbus_fmt;
+	struct v4l2_rect *crop = &camif->camif_crop;
+	u32 hoff2, voff2;
+	u32 cfg;
+
+	/* Note: s3c244x requirement: left = f_width - rect.width / 2 */
+	cfg = camif_read(camif, S3C_CAMIF_REG_CIWDOFST);
+	cfg &= ~(CIWDOFST_OFST_MASK | CIWDOFST_WINOFSEN);
+	cfg |= (crop->left << 16) | crop->top;
+	if (crop->left != 0 || crop->top != 0)
+		cfg |= CIWDOFST_WINOFSEN;
+	camif_write(camif, S3C_CAMIF_REG_CIWDOFST, cfg);
+
+	if (camif->variant->ip_revision == S3C6410_CAMIF_IP_REV) {
+		hoff2 = mf->width - crop->width - crop->left;
+		voff2 = mf->height - crop->height - crop->top;
+		cfg = (hoff2 << 16) | voff2;
+		camif_write(camif, S3C_CAMIF_REG_CIWDOFST2, cfg);
+	}
+}
+
+void camif_hw_clear_fifo_overflow(struct camif_vp *vp)
+{
+	struct camif_dev *camif = vp->camif;
+	u32 cfg;
+
+	cfg = camif_read(camif, S3C_CAMIF_REG_CIWDOFST);
+	if (vp->id == 0)
+		cfg |= (CIWDOFST_CLROVCOFIY | CIWDOFST_CLROVCOFICB |
+			CIWDOFST_CLROVCOFICR);
+	else
+		cfg |= (/* CIWDOFST_CLROVPRFIY | */ CIWDOFST_CLROVPRFICB |
+			CIWDOFST_CLROVPRFICR);
+	camif_write(camif, S3C_CAMIF_REG_CIWDOFST, cfg);
+}
+
+/* Set video bus signals polarity */
+void camif_hw_set_camera_bus(struct camif_dev *camif)
+{
+	unsigned int flags = camif->pdata.sensor.flags;
+
+	u32 cfg = camif_read(camif, S3C_CAMIF_REG_CIGCTRL);
+
+	cfg &= ~(CIGCTRL_INVPOLPCLK | CIGCTRL_INVPOLVSYNC |
+		 CIGCTRL_INVPOLHREF | CIGCTRL_INVPOLFIELD);
+
+	if (flags & V4L2_MBUS_PCLK_SAMPLE_FALLING)
+		cfg |= CIGCTRL_INVPOLPCLK;
+
+	if (flags & V4L2_MBUS_VSYNC_ACTIVE_LOW)
+		cfg |= CIGCTRL_INVPOLVSYNC;
+	/*
+	 * HREF is normally high during frame active data
+	 * transmission and low during horizontal synchronization
+	 * period. Thus HREF active high means HSYNC active low.
+	 */
+	if (flags & V4L2_MBUS_HSYNC_ACTIVE_HIGH)
+		cfg |= CIGCTRL_INVPOLHREF; /* HREF active low */
+
+	if (camif->variant->ip_revision == S3C6410_CAMIF_IP_REV) {
+		if (flags & V4L2_MBUS_FIELD_EVEN_LOW)
+			cfg |= CIGCTRL_INVPOLFIELD;
+		cfg |= CIGCTRL_FIELDMODE;
+	}
+
+	pr_debug("Setting CIGCTRL to: %#x\n", cfg);
+
+	camif_write(camif, S3C_CAMIF_REG_CIGCTRL, cfg);
+}
+
+void camif_hw_set_output_addr(struct camif_vp *vp,
+			      struct camif_addr *paddr, int i)
+{
+	struct camif_dev *camif = vp->camif;
+
+	camif_write(camif, S3C_CAMIF_REG_CIYSA(vp->id, i), paddr->y);
+	if (camif->variant->ip_revision == S3C6410_CAMIF_IP_REV
+		|| vp->id == VP_CODEC) {
+		camif_write(camif, S3C_CAMIF_REG_CICBSA(vp->id, i),
+								paddr->cb);
+		camif_write(camif, S3C_CAMIF_REG_CICRSA(vp->id, i),
+								paddr->cr);
+	}
+
+	pr_debug("dst_buf[%d]: %#X, cb: %#X, cr: %#X\n",
+		 i, paddr->y, paddr->cb, paddr->cr);
+}
+
+static void camif_hw_set_out_dma_size(struct camif_vp *vp)
+{
+	struct camif_frame *frame = &vp->out_frame;
+	u32 cfg;
+
+	cfg = camif_read(vp->camif, S3C_CAMIF_REG_CITRGFMT(vp->id, vp->offset));
+	cfg &= ~CITRGFMT_TARGETSIZE_MASK;
+	cfg |= (frame->f_width << 16) | frame->f_height;
+	camif_write(vp->camif, S3C_CAMIF_REG_CITRGFMT(vp->id, vp->offset), cfg);
+}
+
+static void camif_get_dma_burst(u32 width, u32 ybpp, u32 *mburst, u32 *rburst)
+{
+	unsigned int nwords = width * ybpp / 4;
+	unsigned int div, rem;
+
+	if (WARN_ON(width < 8 || (width * ybpp) & 7))
+		return;
+
+	for (div = 16; div >= 2; div /= 2) {
+		if (nwords < div)
+			continue;
+
+		rem = nwords & (div - 1);
+		if (rem == 0) {
+			*mburst = div;
+			*rburst = div;
+			break;
+		}
+		if (rem == div / 2 || rem == div / 4) {
+			*mburst = div;
+			*rburst = rem;
+			break;
+		}
+	}
+}
+
+void camif_hw_set_output_dma(struct camif_vp *vp)
+{
+	struct camif_dev *camif = vp->camif;
+	struct camif_frame *frame = &vp->out_frame;
+	const struct camif_fmt *fmt = vp->out_fmt;
+	unsigned int ymburst = 0, yrburst = 0;
+	u32 cfg;
+
+	camif_hw_set_out_dma_size(vp);
+
+	if (camif->variant->ip_revision == S3C6410_CAMIF_IP_REV) {
+		struct camif_dma_offset *offset = &frame->dma_offset;
+		/* Set the input dma offsets. */
+		cfg = S3C_CISS_OFFS_INITIAL(offset->initial);
+		cfg |= S3C_CISS_OFFS_LINE(offset->line);
+		camif_write(camif, S3C_CAMIF_REG_CISSY(vp->id), cfg);
+		camif_write(camif, S3C_CAMIF_REG_CISSCB(vp->id), cfg);
+		camif_write(camif, S3C_CAMIF_REG_CISSCR(vp->id), cfg);
+	}
+
+	/* Configure DMA burst values */
+	camif_get_dma_burst(frame->rect.width, fmt->ybpp, &ymburst, &yrburst);
+
+	cfg = camif_read(camif, S3C_CAMIF_REG_CICTRL(vp->id, vp->offset));
+	cfg &= ~CICTRL_BURST_MASK;
+
+	cfg |= CICTRL_YBURST1(ymburst) | CICTRL_YBURST2(yrburst);
+	cfg |= CICTRL_CBURST1(ymburst / 2) | CICTRL_CBURST2(yrburst / 2);
+
+	camif_write(camif, S3C_CAMIF_REG_CICTRL(vp->id, vp->offset), cfg);
+
+	pr_debug("ymburst: %u, yrburst: %u\n", ymburst, yrburst);
+}
+
+void camif_hw_set_input_path(struct camif_vp *vp)
+{
+	u32 cfg = camif_read(vp->camif, S3C_CAMIF_REG_MSCTRL(vp->id));
+	cfg &= ~MSCTRL_SEL_DMA_CAM;
+	camif_write(vp->camif, S3C_CAMIF_REG_MSCTRL(vp->id), cfg);
+}
+
+void camif_hw_set_target_format(struct camif_vp *vp)
+{
+	struct camif_dev *camif = vp->camif;
+	struct camif_frame *frame = &vp->out_frame;
+	u32 cfg;
+
+	pr_debug("fw: %d, fh: %d color: %d\n", frame->f_width,
+		 frame->f_height, vp->out_fmt->color);
+
+	cfg = camif_read(camif, S3C_CAMIF_REG_CITRGFMT(vp->id, vp->offset));
+	cfg &= ~CITRGFMT_TARGETSIZE_MASK;
+
+	if (camif->variant->ip_revision == S3C244X_CAMIF_IP_REV) {
+		/* We currently support only YCbCr 4:2:2 at the camera input */
+		cfg |= CITRGFMT_IN422;
+		cfg &= ~CITRGFMT_OUT422;
+		if (vp->out_fmt->color == IMG_FMT_YCBCR422P)
+			cfg |= CITRGFMT_OUT422;
+	} else {
+		cfg &= ~CITRGFMT_OUTFORMAT_MASK;
+		switch (vp->out_fmt->color) {
+		case IMG_FMT_RGB565...IMG_FMT_XRGB8888:
+			cfg |= CITRGFMT_OUTFORMAT_RGB;
+			break;
+		case IMG_FMT_YCBCR420...IMG_FMT_YCRCB420:
+			cfg |= CITRGFMT_OUTFORMAT_YCBCR420;
+			break;
+		case IMG_FMT_YCBCR422P:
+			cfg |= CITRGFMT_OUTFORMAT_YCBCR422;
+			break;
+		case IMG_FMT_YCBYCR422...IMG_FMT_CRYCBY422:
+			cfg |= CITRGFMT_OUTFORMAT_YCBCR422I;
+			break;
+		}
+	}
+
+	/* Rotation is only supported by s3c64xx */
+	if (vp->rotation == 90 || vp->rotation == 270)
+		cfg |= (frame->f_height << 16) | frame->f_width;
+	else
+		cfg |= (frame->f_width << 16) | frame->f_height;
+	camif_write(camif, S3C_CAMIF_REG_CITRGFMT(vp->id, vp->offset), cfg);
+
+	/* Target area, output pixel width * height */
+	cfg = camif_read(camif, S3C_CAMIF_REG_CITAREA(vp->id, vp->offset));
+	cfg &= ~CITAREA_MASK;
+	cfg |= (frame->f_width * frame->f_height);
+	camif_write(camif, S3C_CAMIF_REG_CITAREA(vp->id, vp->offset), cfg);
+}
+
+void camif_hw_set_flip(struct camif_vp *vp)
+{
+	u32 cfg = camif_read(vp->camif,
+				S3C_CAMIF_REG_CITRGFMT(vp->id, vp->offset));
+
+	cfg &= ~CITRGFMT_FLIP_MASK;
+
+	if (vp->hflip)
+		cfg |= CITRGFMT_FLIP_Y_MIRROR;
+	if (vp->vflip)
+		cfg |= CITRGFMT_FLIP_X_MIRROR;
+
+	camif_write(vp->camif, S3C_CAMIF_REG_CITRGFMT(vp->id, vp->offset), cfg);
+}
+
+static void camif_hw_set_prescaler(struct camif_vp *vp)
+{
+	struct camif_dev *camif = vp->camif;
+	struct camif_scaler *sc = &vp->scaler;
+	u32 cfg, shfactor, addr;
+
+	addr = S3C_CAMIF_REG_CISCPRERATIO(vp->id, vp->offset);
+
+	shfactor = 10 - (sc->h_shift + sc->v_shift);
+	cfg = shfactor << 28;
+
+	cfg |= (sc->pre_h_ratio << 16) | sc->pre_v_ratio;
+	camif_write(camif, addr, cfg);
+
+	cfg = (sc->pre_dst_width << 16) | sc->pre_dst_height;
+	camif_write(camif, S3C_CAMIF_REG_CISCPREDST(vp->id, vp->offset), cfg);
+}
+
+void camif_s3c244x_hw_set_scaler(struct camif_vp *vp)
+{
+	struct camif_dev *camif = vp->camif;
+	struct camif_scaler *scaler = &vp->scaler;
+	unsigned int color = vp->out_fmt->color;
+	u32 cfg;
+
+	camif_hw_set_prescaler(vp);
+
+	cfg = camif_read(camif, S3C_CAMIF_REG_CISCCTRL(vp->id, vp->offset));
+
+	cfg &= ~(CISCCTRL_SCALEUP_MASK | CISCCTRL_SCALERBYPASS |
+		 CISCCTRL_MAIN_RATIO_MASK | CIPRSCCTRL_RGB_FORMAT_24BIT);
+
+	if (scaler->enable) {
+		if (scaler->scaleup_h) {
+			if (vp->id == VP_CODEC)
+				cfg |= CISCCTRL_SCALEUP_H;
+			else
+				cfg |= CIPRSCCTRL_SCALEUP_H;
+		}
+		if (scaler->scaleup_v) {
+			if (vp->id == VP_CODEC)
+				cfg |= CISCCTRL_SCALEUP_V;
+			else
+				cfg |= CIPRSCCTRL_SCALEUP_V;
+		}
+	} else {
+		if (vp->id == VP_CODEC)
+			cfg |= CISCCTRL_SCALERBYPASS;
+	}
+
+	cfg |= ((scaler->main_h_ratio & 0x1ff) << 16);
+	cfg |= scaler->main_v_ratio & 0x1ff;
+
+	if (vp->id == VP_PREVIEW) {
+		if (color == IMG_FMT_XRGB8888)
+			cfg |= CIPRSCCTRL_RGB_FORMAT_24BIT;
+		cfg |= CIPRSCCTRL_SAMPLE;
+	}
+
+	camif_write(camif, S3C_CAMIF_REG_CISCCTRL(vp->id, vp->offset), cfg);
+
+	pr_debug("main: h_ratio: %#x, v_ratio: %#x",
+		 scaler->main_h_ratio, scaler->main_v_ratio);
+}
+
+void camif_s3c64xx_hw_set_scaler(struct camif_vp *vp)
+{
+	struct camif_dev *camif = vp->camif;
+	struct camif_scaler *scaler = &vp->scaler;
+	unsigned int color = vp->out_fmt->color;
+	u32 cfg;
+
+	camif_hw_set_prescaler(vp);
+
+	cfg = camif_read(camif, S3C_CAMIF_REG_CISCCTRL(vp->id, vp->offset));
+
+	cfg &= ~(CISCCTRL_CSCR2Y_WIDE | CISCCTRL_CSCY2R_WIDE
+		| CISCCTRL_SCALEUP_H | CISCCTRL_SCALEUP_V
+		| CISCCTRL_SCALERBYPASS | CISCCTRL_ONE2ONE
+		| CISCCTRL_INRGB_FMT_MASK | CISCCTRL_OUTRGB_FMT_MASK
+		| CISCCTRL_INTERLACE | CISCCTRL_EXTRGB_EXTENSION
+		| CISCCTRL_MAIN_RATIO_MASK);
+
+	cfg |= (CISCCTRL_CSCR2Y_WIDE | CISCCTRL_CSCY2R_WIDE);
+
+	if (!scaler->enable) {
+		cfg |= CISCCTRL_SCALERBYPASS;
+	} else {
+		if (scaler->scaleup_h)
+			cfg |= CISCCTRL_SCALEUP_H;
+		if (scaler->scaleup_v)
+			cfg |= CISCCTRL_SCALEUP_V;
+		if (scaler->copy)
+			cfg |= CISCCTRL_ONE2ONE;
+	}
+
+	switch (color) {
+	case IMG_FMT_RGB666:
+		cfg |= CISCCTRL_OUTRGB_FMT_RGB666;
+		break;
+	case IMG_FMT_XRGB8888:
+		cfg |= CISCCTRL_OUTRGB_FMT_RGB888;
+		break;
+	}
+
+	cfg |= (scaler->main_h_ratio & 0x1ff) << 16;
+	cfg |= scaler->main_v_ratio & 0x1ff;
+
+	camif_write(camif, S3C_CAMIF_REG_CISCCTRL(vp->id, vp->offset), cfg);
+
+	pr_debug("main: h_ratio: %#x, v_ratio: %#x",
+		 scaler->main_h_ratio, scaler->main_v_ratio);
+}
+
+void camif_hw_set_scaler(struct camif_vp *vp)
+{
+	unsigned int ip_rev = vp->camif->variant->ip_revision;
+
+	if (ip_rev == S3C244X_CAMIF_IP_REV)
+		camif_s3c244x_hw_set_scaler(vp);
+	else
+		camif_s3c64xx_hw_set_scaler(vp);
+}
+
+void camif_hw_enable_scaler(struct camif_vp *vp, bool on)
+{
+	u32 addr = S3C_CAMIF_REG_CISCCTRL(vp->id, vp->offset);
+	u32 cfg;
+
+	cfg = camif_read(vp->camif, addr);
+	if (on)
+		cfg |= CISCCTRL_SCALERSTART;
+	else
+		cfg &= ~CISCCTRL_SCALERSTART;
+	camif_write(vp->camif, addr, cfg);
+}
+
+void camif_hw_set_lastirq(struct camif_vp *vp, int enable)
+{
+	u32 addr = S3C_CAMIF_REG_CICTRL(vp->id, vp->offset);
+	u32 cfg;
+
+	cfg = camif_read(vp->camif, addr);
+	if (enable)
+		cfg |= CICTRL_LASTIRQ_ENABLE;
+	else
+		cfg &= ~CICTRL_LASTIRQ_ENABLE;
+	camif_write(vp->camif, addr, cfg);
+}
+
+void camif_hw_enable_capture(struct camif_vp *vp)
+{
+	struct camif_dev *camif = vp->camif;
+	u32 cfg;
+
+	cfg = camif_read(camif, S3C_CAMIF_REG_CIIMGCPT(vp->offset));
+	camif->stream_count++;
+
+	if (camif->variant->ip_revision == S3C6410_CAMIF_IP_REV)
+		cfg |= CIIMGCPT_CPT_FREN_ENABLE(vp->id);
+
+	if (vp->scaler.enable)
+		cfg |= CIIMGCPT_IMGCPTEN_SC(vp->id);
+
+	if (camif->stream_count == 1)
+		cfg |= CIIMGCPT_IMGCPTEN;
+
+	camif_write(camif, S3C_CAMIF_REG_CIIMGCPT(vp->offset), cfg);
+
+	pr_debug("CIIMGCPT: %#x, camif->stream_count: %d\n",
+		 cfg, camif->stream_count);
+}
+
+void camif_hw_disable_capture(struct camif_vp *vp)
+{
+	struct camif_dev *camif = vp->camif;
+	u32 cfg;
+
+	cfg = camif_read(camif, S3C_CAMIF_REG_CIIMGCPT(vp->offset));
+	cfg &= ~CIIMGCPT_IMGCPTEN_SC(vp->id);
+
+	if (WARN_ON(--(camif->stream_count) < 0))
+		camif->stream_count = 0;
+
+	if (camif->stream_count == 0)
+		cfg &= ~CIIMGCPT_IMGCPTEN;
+
+	pr_debug("CIIMGCPT: %#x, camif->stream_count: %d\n",
+		 cfg, camif->stream_count);
+
+	camif_write(camif, S3C_CAMIF_REG_CIIMGCPT(vp->offset), cfg);
+}
+
+void camif_hw_dump_regs(struct camif_dev *camif, const char *label)
+{
+	struct {
+		u32 offset;
+		const char * const name;
+	} registers[] = {
+		{ S3C_CAMIF_REG_CISRCFMT,		"CISRCFMT" },
+		{ S3C_CAMIF_REG_CIWDOFST,		"CIWDOFST" },
+		{ S3C_CAMIF_REG_CIGCTRL,		"CIGCTRL" },
+		{ S3C_CAMIF_REG_CIWDOFST2,		"CIWDOFST2" },
+		{ S3C_CAMIF_REG_CIYSA(0, 0),		"CICOYSA0" },
+		{ S3C_CAMIF_REG_CICBSA(0, 0),		"CICOCBSA0" },
+		{ S3C_CAMIF_REG_CICRSA(0, 0),		"CICOCRSA0" },
+		{ S3C_CAMIF_REG_CIYSA(0, 1),		"CICOYSA1" },
+		{ S3C_CAMIF_REG_CICBSA(0, 1),		"CICOCBSA1" },
+		{ S3C_CAMIF_REG_CICRSA(0, 1),		"CICOCRSA1" },
+		{ S3C_CAMIF_REG_CIYSA(0, 2),		"CICOYSA2" },
+		{ S3C_CAMIF_REG_CICBSA(0, 2),		"CICOCBSA2" },
+		{ S3C_CAMIF_REG_CICRSA(0, 2),		"CICOCRSA2" },
+		{ S3C_CAMIF_REG_CIYSA(0, 3),		"CICOYSA3" },
+		{ S3C_CAMIF_REG_CICBSA(0, 3),		"CICOCBSA3" },
+		{ S3C_CAMIF_REG_CICRSA(0, 3),		"CICOCRSA3" },
+		{ S3C_CAMIF_REG_CIYSA(1, 0),		"CIPRYSA0" },
+		{ S3C_CAMIF_REG_CIYSA(1, 1),		"CIPRYSA1" },
+		{ S3C_CAMIF_REG_CIYSA(1, 2),		"CIPRYSA2" },
+		{ S3C_CAMIF_REG_CIYSA(1, 3),		"CIPRYSA3" },
+		{ S3C_CAMIF_REG_CITRGFMT(0, 0),		"CICOTRGFMT" },
+		{ S3C_CAMIF_REG_CITRGFMT(1, 0),		"CIPRTRGFMT" },
+		{ S3C_CAMIF_REG_CICTRL(0, 0),		"CICOCTRL" },
+		{ S3C_CAMIF_REG_CICTRL(1, 0),		"CIPRCTRL" },
+		{ S3C_CAMIF_REG_CISCPREDST(0, 0),	"CICOSCPREDST" },
+		{ S3C_CAMIF_REG_CISCPREDST(1, 0),	"CIPRSCPREDST" },
+		{ S3C_CAMIF_REG_CISCPRERATIO(0, 0),	"CICOSCPRERATIO" },
+		{ S3C_CAMIF_REG_CISCPRERATIO(1, 0),	"CIPRSCPRERATIO" },
+		{ S3C_CAMIF_REG_CISCCTRL(0, 0),		"CICOSCCTRL" },
+		{ S3C_CAMIF_REG_CISCCTRL(1, 0),		"CIPRSCCTRL" },
+		{ S3C_CAMIF_REG_CITAREA(0, 0),		"CICOTAREA" },
+		{ S3C_CAMIF_REG_CITAREA(1, 0),		"CIPRTAREA" },
+		{ S3C_CAMIF_REG_CISTATUS(0, 0),		"CICOSTATUS" },
+		{ S3C_CAMIF_REG_CISTATUS(1, 0),		"CIPRSTATUS" },
+		{ S3C_CAMIF_REG_CIIMGCPT(0),		"CIIMGCPT" },
+	};
+	u32 i;
+
+	pr_info("--- %s ---\n", label);
+	for (i = 0; i < ARRAY_SIZE(registers); i++) {
+		u32 cfg = readl(camif->io_base + registers[i].offset);
+		printk(KERN_INFO "%s:\t0x%08x\n", registers[i].name, cfg);
+	}
+}