From patchwork Wed Dec 23 10:08:52 2009 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Pawel Osciak X-Patchwork-Id: 2364 Return-path: Envelope-to: mchehab@infradead.org Delivery-date: Wed, 23 Dec 2009 10:10:49 +0000 Received: from bombadil.infradead.org [18.85.46.34] by gaivota.chehab.org with IMAP (fetchmail-6.3.11) for (single-drop); Wed, 23 Dec 2009 09:08:42 -0200 (BRST) Received: from vger.kernel.org ([209.132.180.67]) by bombadil.infradead.org with esmtp (Exim 4.69 #1 (Red Hat Linux)) id 1NNOB7-0008Eq-4v; Wed, 23 Dec 2009 10:10:49 +0000 Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754978AbZLWKJJ (ORCPT + 1 other); Wed, 23 Dec 2009 05:09:09 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752812AbZLWKJI (ORCPT ); Wed, 23 Dec 2009 05:09:08 -0500 Received: from mailout3.w1.samsung.com ([210.118.77.13]:23146 "EHLO mailout3.w1.samsung.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755188AbZLWKI6 (ORCPT ); Wed, 23 Dec 2009 05:08:58 -0500 MIME-version: 1.0 Content-transfer-encoding: 7BIT Content-type: TEXT/PLAIN Received: from eu_spt1 ([210.118.77.13]) by mailout3.w1.samsung.com (Sun Java(tm) System Messaging Server 6.3-8.04 (built Jul 29 2009; 32bit)) with ESMTP id <0KV3002INO6WIU50@mailout3.w1.samsung.com>; Wed, 23 Dec 2009 10:08:56 +0000 (GMT) Received: from linux.samsung.com ([106.116.38.10]) by spt1.w1.samsung.com (iPlanet Messaging Server 5.2 Patch 2 (built Jul 14 2004)) with ESMTPA id <0KV300BL5O6VU8@spt1.w1.samsung.com>; Wed, 23 Dec 2009 10:08:56 +0000 (GMT) Received: from localhost.localdomain (unknown [106.116.37.23]) by linux.samsung.com (Postfix) with ESMTP id 85654270003; Wed, 23 Dec 2009 11:59:42 +0100 (CET) Date: Wed, 23 Dec 2009 11:08:52 +0100 From: Pawel Osciak Subject: [PATCH 2/2] [ARM] samsung-rotator: Add Samsung S3C/S5P rotator driver In-reply-to: <1261562933-26987-1-git-send-email-p.osciak@samsung.com> To: linux-media@vger.kernel.org, linux-samsung-soc@vger.kernel.org, linux-arm-kernel@lists.infradead.org Cc: p.osciak@samsung.com, m.szyprowski@samsung.com, kyungmin.park@samsung.com, Sylwester Nawrocki Message-id: <1261562933-26987-3-git-send-email-p.osciak@samsung.com> X-Mailer: git-send-email 1.6.5.3 References: <1261562933-26987-1-git-send-email-p.osciak@samsung.com> Sender: linux-media-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org 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 Signed-off-by: Sylwester Nawrocki Reviewed-by: Marek Szyprowski Reviewed-by: Kyungmin Park --- 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, + * Sylwester Nawrocki, + * + * 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 +#include +#include +#include +#include + +#include +#include + +#include +#include + +#include + +#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 "); +MODULE_AUTHOR("Sylwester Nawrocki "); +