The rotator device present on Samsung S3C and S5P series SoCs allows image
rotation and flipping. It requires contiguous memory buffers to operate,
as it does not have scatter-gather support. It is also an example of
a memory-to-memory device, and so uses the mem-2-mem device V4L2 framework.
Signed-off-by: Pawel Osciak <p.osc...@samsung.com>
Signed-off-by: Sylwester Nawrocki <s.nawro...@samsung.com>
Reviewed-by: Marek Szyprowski <m.szyprow...@samsung.com>
Reviewed-by: Kyungmin Park <kyungmin.p...@samsung.com>
---
drivers/media/video/Kconfig | 10 +
drivers/media/video/Makefile | 2 +
drivers/media/video/samsung-rotator/Makefile | 1 +
drivers/media/video/samsung-rotator/s3c_rotator.c | 1026 +++++++++++++++++++++
4 files changed, 1039 insertions(+), 0 deletions(-)
create mode 100644 drivers/media/video/samsung-rotator/Makefile
create mode 100644 drivers/media/video/samsung-rotator/s3c_rotator.c
diff --git a/drivers/media/video/Kconfig b/drivers/media/video/Kconfig
index 6fe4b53..b6040bd 100644
--- a/drivers/media/video/Kconfig
+++ b/drivers/media/video/Kconfig
@@ -1100,4 +1100,14 @@ config VIDEO_MEM2MEM_TESTDEV
This is a virtual test device for the memory-to-memory driver
framework.
+config VIDEO_SAMSUNG_ROTATOR
+ tristate "Samsung S3C/S5P embedded image rotator"
+ depends on VIDEO_V4L2
+ select VIDEOBUF_DMA_CONTIG
+ select V4L2_MEM2MEM_DEV
+ default n
+ help
+ An image rotator device present on Samsung S3C and S5P series SoCs
+ allows image rotation and flipping.
+
endif # V4L_MEM2MEM_DRIVERS
diff --git a/drivers/media/video/Makefile b/drivers/media/video/Makefile
index 8667f1c..72196df 100644
--- a/drivers/media/video/Makefile
+++ b/drivers/media/video/Makefile
@@ -172,6 +172,8 @@ obj-$(CONFIG_VIDEO_IR_I2C) += ir-kbd-i2c.o
obj-$(CONFIG_ARCH_DAVINCI) += davinci/
+obj-$(CONFIG_VIDEO_SAMSUNG_ROTATOR) += samsung-rotator/
+
EXTRA_CFLAGS += -Idrivers/media/dvb/dvb-core
EXTRA_CFLAGS += -Idrivers/media/dvb/frontends
EXTRA_CFLAGS += -Idrivers/media/common/tuners
diff --git a/drivers/media/video/samsung-rotator/Makefile
b/drivers/media/video/samsung-rotator/Makefile
new file mode 100644
index 0000000..9ce9ee9
--- /dev/null
+++ b/drivers/media/video/samsung-rotator/Makefile
@@ -0,0 +1 @@
+obj-$(CONFIG_VIDEO_SAMSUNG_ROTATOR) += s3c_rotator.o
diff --git a/drivers/media/video/samsung-rotator/s3c_rotator.c
b/drivers/media/video/samsung-rotator/s3c_rotator.c
new file mode 100644
index 0000000..83f9059
--- /dev/null
+++ b/drivers/media/video/samsung-rotator/s3c_rotator.c
@@ -0,0 +1,1026 @@
+/*
+ * Samsung S3C/S5P image rotator driver.
+ *
+ * Copyright (c) 2009 Samsung Electronics Co., Ltd.
+ * Pawel Osciak, <p.osc...@samsung.com>
+ * Sylwester Nawrocki, <s.nawro...@samsung.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the
+ * License, or (at your option) any later version
+ */
+#include <linux/module.h>
+#include <linux/interrupt.h>
+#include <asm/io.h>
+#include <linux/platform_device.h>
+#include <linux/version.h>
+
+#include <media/v4l2-device.h>
+#include <media/v4l2-ioctl.h>
+
+#include <media/v4l2-mem2mem.h>
+#include <media/videobuf-dma-contig.h>
+
+#include <plat/regs-rotator.h>
+
+#define S3C_ROTATOR_NAME "s3c-rotator"
+#define S3C_ROTATOR_MEM_LIMIT (16 * 1024 * 1024)
+#define S3C_ROTATOR_MAX_WIDTH 2048
+#define S3C_ROTATOR_MAX_HEIGHT 2048
+
+/*#define S3C_ROTATOR_DEBUG_REGWRITE*/
+#ifdef S3C_ROTATOR_DEBUG_REGWRITE
+#undef writel
+#define writel(v, r) do { \
+ printk(KERN_DEBUG "%s: %08x => %p\n", __func__, (unsigned int)v, r); \
+ __raw_writel(v, r); } while(0)
+#endif /* S3C_ROTATOR_DEBUG_REGWRITE */
+
+#define V4L2_CID_PRIVATE_ROTATE (V4L2_CID_PRIVATE_BASE + 0)
+
+struct s3c_rotator_fmt {
+ char *name;
+ u32 fourcc;
+ u32 depth;
+};
+
+/* Input/output formats (no conversion) */
+static struct s3c_rotator_fmt formats[] = {
+ {
+ .name = "4:2:2, packed, YUYV",
+ .fourcc = V4L2_PIX_FMT_YUYV,
+ .depth = 16,
+ },
+ {
+ .name = "4:2:0, planar YUV",
+ .fourcc = V4L2_PIX_FMT_YUV420,
+ .depth = 12,
+ },
+ {
+ .name = "BGR565X",
+ .fourcc = V4L2_PIX_FMT_RGB565X,
+ .depth = 16,
+ },
+ {
+ .name = "BGRA8888",
+ .fourcc = V4L2_PIX_FMT_BGR32,
+ .depth = 32,
+ },
+};
+
+#define NUM_FORMATS ARRAY_SIZE(formats)
+
+/*
+ * The device can only do one operation at a time,
+ * i.e. simultaneous rotation + flip is not possible
+ */
+static struct v4l2_queryctrl s3c_rotator_ctrls[] = {
+ {
+ .id = V4L2_CID_HFLIP,
+ .type = V4L2_CTRL_TYPE_BOOLEAN,
+ .name = "Horizontal flip",
+ .minimum = 0,
+ .maximum = 1,
+ .default_value = 0,
+ },
+ {
+ .id = V4L2_CID_VFLIP,
+ .type = V4L2_CTRL_TYPE_BOOLEAN,
+ .name = "Vertical flip",
+ .minimum = 0,
+ .maximum = 1,
+ .default_value = 0,
+ },
+ {
+ .id = V4L2_CID_PRIVATE_ROTATE,
+ .type = V4L2_CTRL_TYPE_INTEGER,
+ .name = "Rotation (CCW)",
+ .minimum = 90,
+ .maximum = 270,
+ .step = 90,
+ .default_value = 0,
+ },
+};
+
+static struct v4l2_queryctrl *get_ctrl(int id)
+{
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(s3c_rotator_ctrls); ++i) {
+ if (id == s3c_rotator_ctrls[i].id) {
+ return &s3c_rotator_ctrls[i];
+ }
+ }
+
+ return NULL;
+}
+
+struct s3c_rotator_dev {
+ struct v4l2_device v4l2_dev;
+ struct video_device *vfd;
+ struct v4l2_m2m_dev *m2m_dev;
+
+ atomic_t num_inst;
+ spinlock_t irqlock;
+
+ struct resource *mem_res;
+ struct resource *regs_res;
+ void __iomem *regs_base;
+ int irq;
+};
+
+/**
+ * struct rot_buf_addr - physical addresses of each color component
+ * @y_rgb: physical address of Y (for YCbCr) or RGB data buffer (for RGB)
+ * @cb: physical address of Cb component buffer for YCbCr
+ * @cr: physical address of Cr component buffer for YCbCr
+ */
+struct rot_buf_addr {
+ unsigned long y_rgb;
+ unsigned long cb;
+ unsigned long cr;
+};
+
+/**
+ * enum - flip modes (only for rotation = 0).
+ * @FLIP_NONE: no flip
+ * @FLIP_VERT: vertical flip
+ * @FLIP_HORIZ: horizontal flip
+ */
+enum {
+ FLIP_NONE = 0,
+ FLIP_VERT = 2,
+ FLIP_HORIZ = 3,
+};
+
+/**
+ * struct s3c_rotator_ctx - per-instance data.
+ * @dev - device state
+ * @m2m_ctx- mem-to-mem framework context for this instance
+ * @fmt - currently selected format
+ * @width - image width in pixels
+ * @height - image height in pixels
+ * @sizeimage - image size in bytes
+ * @rotation - current rotation mode
+ * @flip - current flip mode
+ * @src_addr - physical addresses of source image
+ * @dst_addr - physical addresses of destination image
+ */
+struct s3c_rotator_ctx {
+ struct s3c_rotator_dev *dev;
+ struct v4l2_m2m_ctx *m2m_ctx;
+
+ struct s3c_rotator_fmt *fmt;
+ unsigned int width;
+ unsigned int height;
+ unsigned int sizeimage;
+
+ unsigned int rotation;
+ int flip;
+
+ struct rot_buf_addr src_addr;
+ struct rot_buf_addr dst_addr;
+};
+
+struct s3c_rotator_buffer {
+ struct videobuf_buffer vb;
+};
+
+/**
+ * s3c_rot_set_src_reg() - set up source addresses in hardware
+ */
+static inline void s3c_rot_set_src_reg(struct s3c_rotator_dev *dev,
+ struct s3c_rotator_ctx *ctx)
+{
+ void __iomem *regs = dev->regs_base;
+
+ writel(ctx->src_addr.y_rgb, regs + S3C_ROTATOR_SRCADDRREG0);
+ writel(ctx->src_addr.cb, regs + S3C_ROTATOR_SRCADDRREG1);
+ writel(ctx->src_addr.cr, regs + S3C_ROTATOR_SRCADDRREG2);
+}
+
+/**
+ * s3c_rot_set_dest_reg() - set up destination addresses in hardware
+ */
+static inline void s3c_rot_set_dest_reg(struct s3c_rotator_dev *dev,
+ struct s3c_rotator_ctx *ctx)
+{
+ void __iomem *regs = dev->regs_base;
+
+ writel(ctx->dst_addr.y_rgb, regs + S3C_ROTATOR_DESTADDRREG0);
+ writel(ctx->dst_addr.cb, regs + S3C_ROTATOR_DESTADDRREG1);
+ writel(ctx->dst_addr.cr, regs + S3C_ROTATOR_DESTADDRREG2);
+}
+
+/**
+ * s3c_rotator_start() - start the device
+ */
+static inline void s3c_rotator_start(struct s3c_rotator_dev *dev)
+{
+ u32 reg;
+
+ reg = readl(dev->regs_base + S3C_ROTATOR_CTRLREG);
+ reg |= (S3C_ROTATOR_CTRLREG_START | S3C_ROTATOR_CTRLREG_ENABLE_INT);
+ writel(reg, dev->regs_base + S3C_ROTATOR_CTRLREG);
+}
+
+/**
+ * s3c_rot_set_size_reg() - set up image dimensions in hardware
+ */
+static inline void s3c_rot_set_size_reg(struct s3c_rotator_dev *dev,
+ struct s3c_rotator_ctx *ctx)
+{
+ writel(S3C_ROT_SRC_HEIGHT(ctx->height) | S3C_ROT_SRC_WIDTH(ctx->width),
+ dev->regs_base + S3C_ROTATOR_SRCSIZEREG);
+}
+
+/**
+ * s3c_rot_set_ctrl_reg() - set up operation type in hardware
+ */
+static void s3c_rot_set_ctrl_reg(struct s3c_rotator_dev *dev,
+ struct s3c_rotator_ctx *ctx)
+{
+ u32 reg;
+
+ reg = readl(dev->regs_base + S3C_ROTATOR_CTRLREG);
+ reg &= ~S3C_ROTATOR_CTRLREG_MASK;
+
+ switch (ctx->fmt->fourcc) {
+ case V4L2_PIX_FMT_YUYV:
+ reg |= S3C_ROTATOR_CTRLREG_SRC_YCBCR422;
+ break;
+
+ case V4L2_PIX_FMT_YUV420:
+ reg |= S3C_ROTATOR_CTRLREG_SRC_YCBCR420;
+ break;
+
+ case V4L2_PIX_FMT_RGB565X:
+ reg |= S3C_ROTATOR_CTRLREG_SRC_RGB565;
+ break;
+
+ case V4L2_PIX_FMT_BGR32:
+ reg |= S3C_ROTATOR_CTRLREG_SRC_RGB888;
+ break;
+
+ default:
+ break;
+ }
+
+ /* We can do either flipping or rotation, not both */
+ if (ctx->flip == FLIP_HORIZ) {
+ reg |= S3C_ROTATOR_CTRLREG_FLIP_HORIZ;
+ } else if (ctx->flip == FLIP_VERT) {
+ reg |= S3C_ROTATOR_CTRLREG_FLIP_VERT;
+ } else {
+ switch (ctx->rotation) {
+ case 90:
+ reg |= S3C_ROTATOR_CTRLREG_DEGREE_90;
+ break;
+
+ case 180:
+ reg |= S3C_ROTATOR_CTRLREG_DEGREE_180;
+ break;
+
+ case 270:
+ reg |= S3C_ROTATOR_CTRLREG_DEGREE_270;
+ break;
+
+ default:
+ break;
+ }
+ }
+
+ writel(reg, dev->regs_base + S3C_ROTATOR_CTRLREG);
+}
+
+/**
+ * job_abort() - called when a device has to be prematurely stopped
+ */
+static void job_abort(void *priv)
+{
+}
+
+/**
+ * device_run() - prepare the device and run the operation
+ */
+static void device_run(void *priv)
+{
+ struct s3c_rotator_ctx *ctx = priv;
+ struct s3c_rotator_dev *dev = ctx->dev;
+ struct s3c_rotator_buffer *src_buf;
+ struct s3c_rotator_buffer *dst_buf;
+
+ /* Acquire source and destination buffers */
+ src_buf = v4l2_m2m_next_src_buf(ctx->m2m_ctx);
+ dst_buf = v4l2_m2m_next_dst_buf(ctx->m2m_ctx);
+
+ /* Set operation parameters */
+ s3c_rot_set_ctrl_reg(dev, ctx);
+ s3c_rot_set_size_reg(dev, ctx);
+
+ /* Calculate physical addresses of image buffers and set */
+ ctx->src_addr.y_rgb = videobuf_to_dma_contig(&src_buf->vb);
+ ctx->src_addr.cb = ctx->src_addr.y_rgb + ctx->width * ctx->height;
+ ctx->src_addr.cr = ctx->src_addr.y_rgb +
+ ((ctx->width * ctx->height * 5) / 4);
+ s3c_rot_set_src_reg(dev, ctx);
+
+ ctx->dst_addr.y_rgb = videobuf_to_dma_contig(&dst_buf->vb);
+ ctx->dst_addr.cb = ctx->dst_addr.y_rgb + ctx->width * ctx->height;
+ ctx->dst_addr.cr = ctx->dst_addr.y_rgb +
+ ((ctx->width * ctx->height * 5) / 4);
+ s3c_rot_set_dest_reg(dev, ctx);
+
+ /* Start the operation */
+ s3c_rotator_start(dev);
+}
+
+
+static int vidioc_querycap(struct file *file, void *priv,
+ struct v4l2_capability *cap)
+{
+ strncpy(cap->driver, S3C_ROTATOR_NAME, sizeof(cap->driver) - 1);
+ strncpy(cap->card, S3C_ROTATOR_NAME, sizeof(cap->card) - 1);
+ cap->bus_info[0] = 0;
+ cap->version = KERNEL_VERSION(1, 0, 0);
+ cap->capabilities = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_VIDEO_OUTPUT
+ | V4L2_CAP_STREAMING;
+
+ return 0;
+}
+
+static int vidioc_enum_fmt(struct file *file, void *priv,
+ struct v4l2_fmtdesc *f)
+{
+ struct s3c_rotator_fmt *fmt;
+
+ if (f->index >= NUM_FORMATS)
+ return -EINVAL;
+
+ fmt = &formats[f->index];
+ strncpy(f->description, fmt->name, sizeof(f->description) - 1);
+ f->pixelformat = fmt->fourcc;
+ return 0;
+}
+
+static int vidioc_g_fmt(struct file *file, void *priv, struct v4l2_format *f)
+{
+ struct s3c_rotator_ctx *ctx = priv;
+
+ f->fmt.pix.width = ctx->width;
+ f->fmt.pix.height = ctx->height;
+ f->fmt.pix.field = V4L2_FIELD_NONE;
+ f->fmt.pix.pixelformat = ctx->fmt->fourcc;
+
+ return 0;
+}
+
+static struct s3c_rotator_fmt *find_format(struct v4l2_format *f)
+{
+ struct s3c_rotator_fmt *fmt;
+ unsigned int i;
+
+ for (i = 0; i < NUM_FORMATS; ++i) {
+ fmt = &formats[i];
+ if (fmt->fourcc == f->fmt.pix.pixelformat)
+ break;
+ }
+
+ if (i == NUM_FORMATS)
+ return NULL;
+
+ return fmt;
+}
+
+static int vidioc_try_fmt(struct file *file, void *priv, struct v4l2_format *f)
+{
+ struct s3c_rotator_ctx *ctx = priv;
+ enum v4l2_field field;
+ struct s3c_rotator_fmt *fmt;
+ u32 pixelformat;
+
+ fmt = find_format(f);
+ if (!fmt) {
+ v4l2_err(&ctx->dev->v4l2_dev,
+ "Fourcc format (0x%08x) invalid.\n",
+ f->fmt.pix.pixelformat);
+ return -EINVAL;
+ }
+
+ pixelformat = f->fmt.pix.pixelformat;
+ field = f->fmt.pix.field;
+
+ if (field == V4L2_FIELD_ANY)
+ field = V4L2_FIELD_NONE;
+ else if (V4L2_FIELD_NONE != field)
+ return -EINVAL;
+
+ f->fmt.pix.field = field;
+
+ if (0 == f->fmt.pix.height || 0 == f->fmt.pix.width)
+ return -EINVAL;
+
+ if (f->fmt.pix.height > S3C_ROTATOR_MAX_HEIGHT)
+ f->fmt.pix.height = S3C_ROTATOR_MAX_HEIGHT;
+
+ if (f->fmt.pix.width > S3C_ROTATOR_MAX_WIDTH)
+ f->fmt.pix.width = S3C_ROTATOR_MAX_WIDTH;
+
+ if (pixelformat == V4L2_PIX_FMT_YUV420) {
+ f->fmt.pix.width &= ~7;
+ f->fmt.pix.height &= ~7;
+ } else if (pixelformat == V4L2_PIX_FMT_YUYV
+ || pixelformat == V4L2_PIX_FMT_RGB565X) {
+ f->fmt.pix.width &= ~1;
+ f->fmt.pix.height &= ~1;
+ }
+
+ f->fmt.pix.bytesperline = (f->fmt.pix.width * fmt->depth) >> 3;
+ f->fmt.pix.sizeimage = f->fmt.pix.height * f->fmt.pix.bytesperline;
+
+ return 0;
+}
+
+static int vidioc_s_fmt(struct file *file, void *priv, struct v4l2_format *f)
+{
+ struct s3c_rotator_ctx *ctx = priv;
+ struct videobuf_queue *src_vq;
+ struct videobuf_queue *dst_vq;
+ int ret = 0;
+
+ ret = vidioc_try_fmt(file, priv, f);
+ if (ret)
+ return ret;
+
+ src_vq = v4l2_m2m_get_src_vq(ctx->m2m_ctx);
+ dst_vq = v4l2_m2m_get_dst_vq(ctx->m2m_ctx);
+
+ mutex_lock(&src_vq->vb_lock);
+ mutex_lock(&dst_vq->vb_lock);
+
+ if (videobuf_queue_is_busy(src_vq)) {
+ v4l2_err(&ctx->dev->v4l2_dev, "%s queue busy\n", __func__);
+ ret = -EBUSY;
+ goto out;
+ }
+
+ if (videobuf_queue_is_busy(dst_vq)) {
+ v4l2_err(&ctx->dev->v4l2_dev, "%s queue busy\n", __func__);
+ ret = -EBUSY;
+ goto out;
+ }
+
+ ctx->fmt = find_format(f);
+ ctx->width = f->fmt.pix.width;
+ ctx->height = f->fmt.pix.height;
+ ctx->sizeimage = (ctx->width * ctx->height
+ * ctx->fmt->depth) >> 3;
+ src_vq->field = dst_vq->field = f->fmt.pix.field;
+
+out:
+ mutex_unlock(&dst_vq->vb_lock);
+ mutex_unlock(&src_vq->vb_lock);
+ return ret;
+}
+
+static int vidioc_reqbufs(struct file *file, void *priv,
+ struct v4l2_requestbuffers *reqbufs)
+{
+ struct s3c_rotator_ctx *ctx = priv;
+
+ return v4l2_m2m_reqbufs(file, ctx->m2m_ctx, reqbufs);
+}
+
+static int vidioc_querybuf(struct file *file, void *priv,
+ struct v4l2_buffer *buf)
+{
+ struct s3c_rotator_ctx *ctx = priv;
+
+ return v4l2_m2m_querybuf(file, ctx->m2m_ctx, buf);
+}
+
+static int vidioc_qbuf(struct file *file, void *priv, struct v4l2_buffer *buf)
+{
+ struct s3c_rotator_ctx *ctx = priv;
+
+ return v4l2_m2m_qbuf(file, ctx->m2m_ctx, buf);
+}
+
+static int vidioc_dqbuf(struct file *file, void *priv, struct v4l2_buffer *buf)
+{
+ struct s3c_rotator_ctx *ctx = priv;
+
+ return v4l2_m2m_dqbuf(file, ctx->m2m_ctx, buf);
+}
+
+static int vidioc_streamon(struct file *file, void *priv,
+ enum v4l2_buf_type type)
+{
+ struct s3c_rotator_ctx *ctx = priv;
+
+ return v4l2_m2m_streamon(file, ctx->m2m_ctx, type);
+}
+
+static int vidioc_streamoff(struct file *file, void *priv,
+ enum v4l2_buf_type type)
+{
+ struct s3c_rotator_ctx *ctx = priv;
+
+ return v4l2_m2m_streamoff(file, ctx->m2m_ctx, type);
+}
+
+static int vidioc_queryctrl(struct file *file, void *priv,
+ struct v4l2_queryctrl *qc)
+{
+ struct v4l2_queryctrl *c;
+
+ c = get_ctrl(qc->id);
+ if (!c)
+ return -EINVAL;
+
+ *qc = *c;
+ return 0;
+}
+
+static int vidioc_g_ctrl(struct file *file, void *priv,
+ struct v4l2_control *ctrl)
+{
+ struct s3c_rotator_ctx *ctx = priv;
+
+ switch (ctrl->id) {
+ case V4L2_CID_HFLIP:
+ ctrl->value = ctx->flip == FLIP_HORIZ ? 1 : 0;
+ break;
+
+ case V4L2_CID_VFLIP:
+ ctrl->value = ctx->flip == FLIP_VERT ? 1 : 0;
+ break;
+
+ case V4L2_CID_PRIVATE_ROTATE:
+ ctrl->value = ctx->rotation;
+ break;
+
+ default:
+ v4l2_err(&ctx->dev->v4l2_dev, "Invalid control\n");
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static int check_ctrl_val(struct s3c_rotator_ctx *ctx,
+ struct v4l2_control *ctrl)
+{
+ struct v4l2_queryctrl *c;
+
+ c = get_ctrl(ctrl->id);
+ if (!c)
+ return -EINVAL;
+
+ if (ctrl->value < c->minimum || ctrl->value > c->maximum
+ || (c->step != 0 && ctrl->value % c->step != 0)) {
+ v4l2_err(&ctx->dev->v4l2_dev, "Invalid control value\n");
+ return -ERANGE;
+ }
+
+ return 0;
+}
+
+static int vidioc_s_ctrl(struct file *file, void *priv,
+ struct v4l2_control *ctrl)
+{
+ struct s3c_rotator_ctx *ctx = priv;
+ int ret = 0;
+
+ ret = check_ctrl_val(ctx, ctrl);
+ if (ret != 0)
+ return ret;
+
+ ctx->rotation = 0;
+ ctx->flip = FLIP_NONE;
+
+ switch (ctrl->id) {
+ case V4L2_CID_HFLIP:
+ if (ctrl->value)
+ ctx->flip = FLIP_HORIZ;
+ break;
+
+ case V4L2_CID_VFLIP:
+ if (ctrl->value)
+ ctx->flip = FLIP_VERT;
+ break;
+
+ case V4L2_CID_PRIVATE_ROTATE:
+ ctx->rotation = ctrl->value;
+ break;
+
+ default:
+ v4l2_err(&ctx->dev->v4l2_dev, "Invalid control\n");
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static const struct v4l2_ioctl_ops s3c_rotator_ioctl_ops = {
+ .vidioc_querycap = vidioc_querycap,
+
+ .vidioc_enum_fmt_vid_cap = vidioc_enum_fmt,
+ .vidioc_enum_fmt_vid_out = vidioc_enum_fmt,
+
+ .vidioc_g_fmt_vid_cap = vidioc_g_fmt,
+ .vidioc_g_fmt_vid_out = vidioc_g_fmt,
+
+ .vidioc_try_fmt_vid_cap = vidioc_try_fmt,
+ .vidioc_try_fmt_vid_out = vidioc_try_fmt,
+
+ .vidioc_s_fmt_vid_cap = vidioc_s_fmt,
+ .vidioc_s_fmt_vid_out = vidioc_s_fmt,
+
+ .vidioc_reqbufs = vidioc_reqbufs,
+ .vidioc_querybuf = vidioc_querybuf,
+
+ .vidioc_qbuf = vidioc_qbuf,
+ .vidioc_dqbuf = vidioc_dqbuf,
+
+ .vidioc_streamon = vidioc_streamon,
+ .vidioc_streamoff = vidioc_streamoff,
+
+ .vidioc_queryctrl = vidioc_queryctrl,
+ .vidioc_g_ctrl = vidioc_g_ctrl,
+ .vidioc_s_ctrl = vidioc_s_ctrl,
+};
+
+
+static void s3c_rotator_buf_release(struct videobuf_queue *vq,
+ struct videobuf_buffer *vb)
+{
+ videobuf_dma_contig_free(vq, vb);
+ vb->state = VIDEOBUF_NEEDS_INIT;
+}
+
+static int s3c_rotator_buf_setup(struct videobuf_queue *vq, unsigned int
*count,
+ unsigned int *size)
+{
+ struct s3c_rotator_ctx *ctx = vq->priv_data;
+
+ *size = (ctx->width * ctx->height * ctx->fmt->depth) >> 3;
+
+ if (0 == *count)
+ *count = 1;
+
+ while (*size * *count > S3C_ROTATOR_MEM_LIMIT)
+ (*count)--;
+
+ return 0;
+}
+
+static int s3c_rotator_buf_prepare(struct videobuf_queue *vq,
+ struct videobuf_buffer *vb,
+ enum v4l2_field field)
+{
+ struct s3c_rotator_ctx *ctx = vq->priv_data;
+ int ret;
+
+ if (vb->baddr) {
+ if (vb->bsize < ctx->sizeimage) {
+ v4l2_err(&ctx->dev->v4l2_dev,
+ "User-provided buffer too small (%d < %d)\n",
+ vb->bsize, ctx->sizeimage);
+ return -EINVAL;
+ }
+ } else if (vb->state != VIDEOBUF_NEEDS_INIT
+ && vb->bsize < ctx->sizeimage) {
+ return -EINVAL;
+ }
+
+ vb->width = ctx->width;
+ vb->height = ctx->height;
+ vb->bytesperline = (ctx->width * ctx->fmt->depth) >> 3;
+ vb->size = ctx->sizeimage;
+ vb->field = field;
+
+ if (VIDEOBUF_NEEDS_INIT == vb->state) {
+ ret = videobuf_iolock(vq, vb, NULL);
+ if (ret) {
+ v4l2_err(&ctx->dev->v4l2_dev, "Iolock failed\n");
+ goto fail;
+ }
+ }
+ vb->state = VIDEOBUF_PREPARED;
+
+ return 0;
+fail:
+ s3c_rotator_buf_release(vq, vb);
+ return ret;
+}
+
+static void s3c_rotator_buf_queue(struct videobuf_queue *vq,
+ struct videobuf_buffer *vb)
+{
+ struct s3c_rotator_ctx *ctx = vq->priv_data;
+
+ v4l2_m2m_buf_queue(ctx->m2m_ctx, vq, vb);
+}
+
+static struct videobuf_queue_ops s3c_rotator_qops = {
+ .buf_setup = s3c_rotator_buf_setup,
+ .buf_prepare = s3c_rotator_buf_prepare,
+ .buf_queue = s3c_rotator_buf_queue,
+ .buf_release = s3c_rotator_buf_release,
+};
+
+static void queue_init(void *priv, struct videobuf_queue *vq,
+ enum v4l2_buf_type type)
+{
+ struct s3c_rotator_ctx *ctx = priv;
+
+ videobuf_queue_dma_contig_init(vq, &s3c_rotator_qops,
+ ctx->dev->v4l2_dev.dev,
+ &ctx->dev->irqlock, type,
+ V4L2_FIELD_NONE,
+ sizeof (struct s3c_rotator_buffer),
+ priv);
+
+}
+
+static irqreturn_t s3c_rotator_isr(int irq, void *priv)
+{
+ struct s3c_rotator_dev *dev = (struct s3c_rotator_dev *)priv;
+ struct s3c_rotator_buffer *src_buf, *dst_buf;
+ struct s3c_rotator_ctx *curr_ctx;
+ u32 reg;
+
+ curr_ctx = v4l2_m2m_get_curr_priv(dev->m2m_dev);
+ if (!curr_ctx)
+ BUG();
+
+ reg = readl(dev->regs_base + S3C_ROTATOR_STATREG);
+
+#ifdef CONFIG_ARCH_S5PC1XX
+ reg |= S3C_ROTATOR_STATREG_INT_PEND;
+ writel(reg, dev->regs_base + S3C_ROTATOR_STATREG);
+#endif
+ reg = readl(dev->regs_base + S3C_ROTATOR_CTRLREG);
+ reg &= ~S3C_ROTATOR_CTRLREG_ENABLE_INT;
+ writel(reg, dev->regs_base + S3C_ROTATOR_CTRLREG);
+
+ src_buf = v4l2_m2m_src_buf_remove(curr_ctx->m2m_ctx);
+ dst_buf = v4l2_m2m_dst_buf_remove(curr_ctx->m2m_ctx);
+
+ v4l2_m2m_job_finish(dev->m2m_dev, curr_ctx->m2m_ctx);
+ src_buf->vb.state = dst_buf->vb.state = VIDEOBUF_DONE;
+ wake_up(&src_buf->vb.done);
+ wake_up(&dst_buf->vb.done);
+
+ return IRQ_HANDLED;
+}
+
+static int s3c_rotator_open(struct file *file)
+{
+ struct s3c_rotator_dev *dev = video_drvdata(file);
+ struct s3c_rotator_ctx *ctx = NULL;
+
+ atomic_inc(&dev->num_inst);
+
+ ctx = kzalloc(sizeof *ctx, GFP_KERNEL);
+ if (!ctx) {
+ atomic_dec(&dev->num_inst);
+ return -ENOMEM;
+ }
+
+ file->private_data = ctx;
+ ctx->dev = dev;
+ /* Default format */
+ ctx->fmt = &formats[0];
+
+ ctx->m2m_ctx = v4l2_m2m_ctx_init(ctx, dev->m2m_dev, queue_init);
+ if (IS_ERR(ctx->m2m_ctx)) {
+ kfree(ctx);
+ atomic_dec(&dev->num_inst);
+ return PTR_ERR(ctx->m2m_ctx);
+ }
+
+ return 0;
+}
+
+static int s3c_rotator_release(struct file *file)
+{
+ struct s3c_rotator_dev *dev = video_drvdata(file);
+ struct s3c_rotator_ctx *ctx = file->private_data;
+
+ v4l2_m2m_ctx_release(ctx->m2m_ctx);
+ kfree(ctx);
+
+ atomic_dec(&dev->num_inst);
+
+ return 0;
+}
+
+static unsigned int s3c_rotator_poll(struct file *file,
+ struct poll_table_struct *wait)
+{
+ struct s3c_rotator_ctx *ctx = file->private_data;
+
+ return v4l2_m2m_poll(file, ctx->m2m_ctx, wait);
+}
+
+static int s3c_rotator_mmap(struct file *file, struct vm_area_struct *vma)
+{
+ struct s3c_rotator_ctx *ctx = file->private_data;
+
+ return v4l2_m2m_mmap(file, ctx->m2m_ctx, vma);
+}
+
+static const struct v4l2_file_operations s3c_rotator_fops = {
+ .owner = THIS_MODULE,
+ .open = s3c_rotator_open,
+ .release = s3c_rotator_release,
+ .poll = s3c_rotator_poll,
+ .ioctl = video_ioctl2,
+ .mmap = s3c_rotator_mmap,
+};
+
+static struct video_device m2mtest_videodev = {
+ .name = S3C_ROTATOR_NAME,
+ .fops = &s3c_rotator_fops,
+ .ioctl_ops = &s3c_rotator_ioctl_ops,
+ .minor = -1,
+ .release = video_device_release,
+};
+
+static struct v4l2_m2m_ops m2m_ops = {
+ .device_run = device_run,
+ .job_abort = job_abort,
+};
+
+static int s3c_rotator_probe(struct platform_device *pdev)
+{
+ struct s3c_rotator_dev *dev;
+ struct video_device *vfd;
+ struct resource *res;
+ int ret = -ENOENT;
+
+ dev = kzalloc(sizeof *dev, GFP_KERNEL);
+ if (!dev)
+ return -ENOMEM;
+
+ spin_lock_init(&dev->irqlock);
+ ret = -ENOENT;
+
+ dev->irq = platform_get_irq(pdev, 0);
+ if (dev->irq <= 0) {
+ dev_err(&pdev->dev, "Failed to acquire irq\n");
+ goto free_dev;
+ }
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (!res) {
+ dev_err(&pdev->dev,
+ "Failed to acquire memory region resource\n");
+ goto free_irq;
+ }
+
+ dev->regs_res = request_mem_region(res->start, resource_size(res),
+ dev_name(&pdev->dev));
+ if (!dev->regs_res) {
+ dev_err(&pdev->dev, "Failed to reserve memory region\n");
+ goto free_irq;
+ }
+
+ dev->regs_base = ioremap(res->start, resource_size(res));
+ if (!dev->regs_base) {
+ dev_err(&pdev->dev, "Ioremap failed\n");
+ ret = -ENXIO;
+ goto rel_res;
+ }
+
+ ret = request_irq(dev->irq, s3c_rotator_isr, 0,
+ S3C_ROTATOR_NAME, dev);
+ if (ret) {
+ dev_err(&pdev->dev, "Requesting irq failed\n");
+ goto regs_unmap;
+ }
+
+ ret = v4l2_device_register(&pdev->dev, &dev->v4l2_dev);
+ if (ret)
+ goto regs_unmap;
+
+ atomic_set(&dev->num_inst, 0);
+
+ vfd = video_device_alloc();
+ if (!vfd) {
+ v4l2_err(&dev->v4l2_dev, "Failed to allocate video device\n");
+ goto unreg_dev;
+ }
+
+ *vfd = m2mtest_videodev;
+
+ ret = video_register_device(vfd, VFL_TYPE_GRABBER, 0);
+ if (ret) {
+ v4l2_err(&dev->v4l2_dev, "Failed to register video device\n");
+ goto rel_vdev;
+ }
+
+ video_set_drvdata(vfd, dev);
+ snprintf(vfd->name, sizeof(vfd->name), "%s", m2mtest_videodev.name);
+ dev->vfd = vfd;
+ v4l2_info(&dev->v4l2_dev,
+ "Device registered as /dev/video%d\n", vfd->num);
+
+ platform_set_drvdata(pdev, dev);
+
+ dev->m2m_dev = v4l2_m2m_init(&m2m_ops);
+ if (IS_ERR(dev->m2m_dev)) {
+ v4l2_err(&dev->v4l2_dev, "Failed to init mem2mem device\n");
+ ret = PTR_ERR(dev->m2m_dev);
+ goto err_m2m;
+ }
+
+ return 0;
+
+err_m2m:
+ video_unregister_device(dev->vfd);
+rel_vdev:
+ video_device_release(vfd);
+unreg_dev:
+ v4l2_device_unregister(&dev->v4l2_dev);
+regs_unmap:
+ iounmap(dev->regs_base);
+rel_res:
+ release_resource(dev->regs_res);
+ kfree(dev->regs_res);
+free_irq:
+ free_irq(dev->irq, dev);
+free_dev:
+ kfree(dev);
+
+ return ret;
+}
+
+static int s3c_rotator_remove(struct platform_device *pdev)
+{
+ struct s3c_rotator_dev *dev =
+ (struct s3c_rotator_dev *)platform_get_drvdata(pdev);
+
+ v4l2_info(&dev->v4l2_dev, "Removing %s\n", S3C_ROTATOR_NAME);
+
+ v4l2_m2m_release(dev->m2m_dev);
+ video_unregister_device(dev->vfd);
+ v4l2_device_unregister(&dev->v4l2_dev);
+ iounmap(dev->regs_base);
+ release_resource(dev->regs_res);
+ kfree(dev->regs_res);
+ free_irq(dev->irq, dev);
+ kfree(dev);
+
+ return 0;
+}
+
+static int s3c_rotator_suspend(struct device *dev)
+{
+ return 0;
+}
+
+static int s3c_rotator_resume(struct device *dev)
+{
+ return 0;
+}
+
+static struct dev_pm_ops s3c_rotator_pm_ops = {
+ .suspend = s3c_rotator_suspend,
+ .resume = s3c_rotator_resume,
+};
+
+static struct platform_driver s3c_rotator_pdrv = {
+ .probe = s3c_rotator_probe,
+ .remove = s3c_rotator_remove,
+ .driver = {
+ .name = S3C_ROTATOR_NAME,
+ .owner = THIS_MODULE,
+ .pm = &s3c_rotator_pm_ops
+ },
+};
+
+static char banner[] __initdata =
+ KERN_INFO "S3C Rotator V4L2 Driver, (c) 2009 Samsung Electronics\n";
+
+static int __init s3c_rotator_init(void)
+{
+ printk(banner);
+ return platform_driver_register(&s3c_rotator_pdrv);
+}
+
+static void __devexit s3c_rotator_exit(void)
+{
+ platform_driver_unregister(&s3c_rotator_pdrv);
+}
+
+module_init(s3c_rotator_init);
+module_exit(s3c_rotator_exit);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Pawel Osciak <p.osc...@samsung.com>");
+MODULE_AUTHOR("Sylwester Nawrocki <s.nawro...@samsung.com>");
+
--
1.6.4.2.253.g0b1fac
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