[deliverable/linux.git] / drivers / media / video / s5p-g2d / g2d.c

/*
 * Samsung S5P G2D - 2D Graphics Accelerator Driver
 *
 * Copyright (c) 2011 Samsung Electronics Co., Ltd.
 * Kamil Debski, <k.debski@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/fs.h>
#include <linux/version.h>
#include <linux/timer.h>
#include <linux/sched.h>
#include <linux/slab.h>
#include <linux/clk.h>
#include <linux/interrupt.h>

#include <linux/platform_device.h>
#include <media/v4l2-mem2mem.h>
#include <media/v4l2-device.h>
#include <media/v4l2-ioctl.h>
#include <media/videobuf2-core.h>
#include <media/videobuf2-dma-contig.h>

#include "g2d.h"
#include "g2d-regs.h"

#define fh2ctx(__fh) container_of(__fh, struct g2d_ctx, fh)

static struct g2d_fmt formats[] = {
	{
		.name	= "XRGB_8888",
		.fourcc	= V4L2_PIX_FMT_RGB32,
		.depth	= 32,
		.hw	= COLOR_MODE(ORDER_XRGB, MODE_XRGB_8888),
	},
	{
		.name	= "RGB_565",
		.fourcc	= V4L2_PIX_FMT_RGB565X,
		.depth	= 16,
		.hw	= COLOR_MODE(ORDER_XRGB, MODE_RGB_565),
	},
	{
		.name	= "XRGB_1555",
		.fourcc	= V4L2_PIX_FMT_RGB555X,
		.depth	= 16,
		.hw	= COLOR_MODE(ORDER_XRGB, MODE_XRGB_1555),
	},
	{
		.name	= "XRGB_4444",
		.fourcc	= V4L2_PIX_FMT_RGB444,
		.depth	= 16,
		.hw	= COLOR_MODE(ORDER_XRGB, MODE_XRGB_4444),
	},
	{
		.name	= "PACKED_RGB_888",
		.fourcc	= V4L2_PIX_FMT_RGB24,
		.depth	= 24,
		.hw	= COLOR_MODE(ORDER_XRGB, MODE_PACKED_RGB_888),
	},
};
#define NUM_FORMATS ARRAY_SIZE(formats)

struct g2d_frame def_frame = {
	.width		= DEFAULT_WIDTH,
	.height		= DEFAULT_HEIGHT,
	.c_width	= DEFAULT_WIDTH,
	.c_height	= DEFAULT_HEIGHT,
	.o_width	= 0,
	.o_height	= 0,
	.fmt		= &formats[0],
	.right		= DEFAULT_WIDTH,
	.bottom		= DEFAULT_HEIGHT,
};

struct g2d_fmt *find_fmt(struct v4l2_format *f)
{
	unsigned int i;
	for (i = 0; i < NUM_FORMATS; i++) {
		if (formats[i].fourcc == f->fmt.pix.pixelformat)
			return &formats[i];
	}
	return NULL;
}


static struct g2d_frame *get_frame(struct g2d_ctx *ctx,
							enum v4l2_buf_type type)
{
	switch (type) {
	case V4L2_BUF_TYPE_VIDEO_OUTPUT:
		return &ctx->in;
	case V4L2_BUF_TYPE_VIDEO_CAPTURE:
		return &ctx->out;
	default:
		return ERR_PTR(-EINVAL);
	}
}

static int g2d_queue_setup(struct vb2_queue *vq, const struct v4l2_format *fmt,
			   unsigned int *nbuffers, unsigned int *nplanes,
			   unsigned int sizes[], void *alloc_ctxs[])
{
	struct g2d_ctx *ctx = vb2_get_drv_priv(vq);
	struct g2d_frame *f = get_frame(ctx, vq->type);

	if (IS_ERR(f))
		return PTR_ERR(f);

	sizes[0] = f->size;
	*nplanes = 1;
	alloc_ctxs[0] = ctx->dev->alloc_ctx;

	if (*nbuffers == 0)
		*nbuffers = 1;

	return 0;
}

static int g2d_buf_prepare(struct vb2_buffer *vb)
{
	struct g2d_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue);
	struct g2d_frame *f = get_frame(ctx, vb->vb2_queue->type);

	if (IS_ERR(f))
		return PTR_ERR(f);
	vb2_set_plane_payload(vb, 0, f->size);
	return 0;
}

static void g2d_buf_queue(struct vb2_buffer *vb)
{
	struct g2d_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue);
	v4l2_m2m_buf_queue(ctx->m2m_ctx, vb);
}


static struct vb2_ops g2d_qops = {
	.queue_setup	= g2d_queue_setup,
	.buf_prepare	= g2d_buf_prepare,
	.buf_queue	= g2d_buf_queue,
};

static int queue_init(void *priv, struct vb2_queue *src_vq,
						struct vb2_queue *dst_vq)
{
	struct g2d_ctx *ctx = priv;
	int ret;

	memset(src_vq, 0, sizeof(*src_vq));
	src_vq->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
	src_vq->io_modes = VB2_MMAP | VB2_USERPTR;
	src_vq->drv_priv = ctx;
	src_vq->ops = &g2d_qops;
	src_vq->mem_ops = &vb2_dma_contig_memops;
	src_vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer);

	ret = vb2_queue_init(src_vq);
	if (ret)
		return ret;

	memset(dst_vq, 0, sizeof(*dst_vq));
	dst_vq->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
	dst_vq->io_modes = VB2_MMAP | VB2_USERPTR;
	dst_vq->drv_priv = ctx;
	dst_vq->ops = &g2d_qops;
	dst_vq->mem_ops = &vb2_dma_contig_memops;
	dst_vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer);

	return vb2_queue_init(dst_vq);
}

static int g2d_s_ctrl(struct v4l2_ctrl *ctrl)
{
	struct g2d_ctx *ctx = container_of(ctrl->handler, struct g2d_ctx,
								ctrl_handler);
	switch (ctrl->id) {
	case V4L2_CID_COLORFX:
		if (ctrl->val == V4L2_COLORFX_NEGATIVE)
			ctx->rop = ROP4_INVERT;
		else
			ctx->rop = ROP4_COPY;
		break;
	default:
		v4l2_err(&ctx->dev->v4l2_dev, "unknown control\n");
		return -EINVAL;
	}
	return 0;
}

static const struct v4l2_ctrl_ops g2d_ctrl_ops = {
	.s_ctrl		= g2d_s_ctrl,
};

int g2d_setup_ctrls(struct g2d_ctx *ctx)
{
	struct g2d_dev *dev = ctx->dev;

	v4l2_ctrl_handler_init(&ctx->ctrl_handler, 1);
	if (ctx->ctrl_handler.error) {
		v4l2_err(&dev->v4l2_dev, "v4l2_ctrl_handler_init failed\n");
		return ctx->ctrl_handler.error;
	}

	v4l2_ctrl_new_std_menu(
		&ctx->ctrl_handler,
		&g2d_ctrl_ops,
		V4L2_CID_COLORFX,
		V4L2_COLORFX_NEGATIVE,
		~((1 << V4L2_COLORFX_NONE) | (1 << V4L2_COLORFX_NEGATIVE)),
		V4L2_COLORFX_NONE);

	if (ctx->ctrl_handler.error) {
		v4l2_err(&dev->v4l2_dev, "v4l2_ctrl_handler_init failed\n");
		return ctx->ctrl_handler.error;
	}

	return 0;
}

static int g2d_open(struct file *file)
{
	struct g2d_dev *dev = video_drvdata(file);
	struct g2d_ctx *ctx = NULL;
	int ret = 0;

	ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
	if (!ctx)
		return -ENOMEM;
	ctx->dev = dev;
	/* Set default formats */
	ctx->in		= def_frame;
	ctx->out	= def_frame;

	ctx->m2m_ctx = v4l2_m2m_ctx_init(dev->m2m_dev, ctx, &queue_init);
	if (IS_ERR(ctx->m2m_ctx)) {
		ret = PTR_ERR(ctx->m2m_ctx);
		kfree(ctx);
		return ret;
	}
	v4l2_fh_init(&ctx->fh, video_devdata(file));
	file->private_data = &ctx->fh;
	v4l2_fh_add(&ctx->fh);

	g2d_setup_ctrls(ctx);

	/* Write the default values to the ctx struct */
	v4l2_ctrl_handler_setup(&ctx->ctrl_handler);

	ctx->fh.ctrl_handler = &ctx->ctrl_handler;

	v4l2_info(&dev->v4l2_dev, "instance opened\n");
	return 0;
}

static int g2d_release(struct file *file)
{
	struct g2d_dev *dev = video_drvdata(file);
	struct g2d_ctx *ctx = fh2ctx(file->private_data);

	v4l2_ctrl_handler_free(&ctx->ctrl_handler);
	v4l2_fh_del(&ctx->fh);
	v4l2_fh_exit(&ctx->fh);
	kfree(ctx);
	v4l2_info(&dev->v4l2_dev, "instance closed\n");
	return 0;
}


static int vidioc_querycap(struct file *file, void *priv,
				struct v4l2_capability *cap)
{
	strncpy(cap->driver, G2D_NAME, sizeof(cap->driver) - 1);
	strncpy(cap->card, G2D_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 *prv, struct v4l2_fmtdesc *f)
{
	struct g2d_fmt *fmt;
	if (f->index >= NUM_FORMATS)
		return -EINVAL;
	fmt = &formats[f->index];
	f->pixelformat = fmt->fourcc;
	strncpy(f->description, fmt->name, sizeof(f->description) - 1);
	return 0;
}

static int vidioc_g_fmt(struct file *file, void *prv, struct v4l2_format *f)
{
	struct g2d_ctx *ctx = prv;
	struct vb2_queue *vq;
	struct g2d_frame *frm;

	vq = v4l2_m2m_get_vq(ctx->m2m_ctx, f->type);
	if (!vq)
		return -EINVAL;
	frm = get_frame(ctx, f->type);
	if (IS_ERR(frm))
		return PTR_ERR(frm);

	f->fmt.pix.width		= frm->width;
	f->fmt.pix.height		= frm->height;
	f->fmt.pix.field		= V4L2_FIELD_NONE;
	f->fmt.pix.pixelformat		= frm->fmt->fourcc;
	f->fmt.pix.bytesperline		= (frm->width * frm->fmt->depth) >> 3;
	f->fmt.pix.sizeimage		= frm->size;
	return 0;
}

static int vidioc_try_fmt(struct file *file, void *prv, struct v4l2_format *f)
{
	struct g2d_fmt *fmt;
	enum v4l2_field *field;

	fmt = find_fmt(f);
	if (!fmt)
		return -EINVAL;

	field = &f->fmt.pix.field;
	if (*field == V4L2_FIELD_ANY)
		*field = V4L2_FIELD_NONE;
	else if (*field != V4L2_FIELD_NONE)
		return -EINVAL;

	if (f->fmt.pix.width > MAX_WIDTH)
		f->fmt.pix.width = MAX_WIDTH;
	if (f->fmt.pix.height > MAX_HEIGHT)
		f->fmt.pix.height = MAX_HEIGHT;

	if (f->fmt.pix.width < 1)
		f->fmt.pix.width = 1;
	if (f->fmt.pix.height < 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 *prv, struct v4l2_format *f)
{
	struct g2d_ctx *ctx = prv;
	struct g2d_dev *dev = ctx->dev;
	struct vb2_queue *vq;
	struct g2d_frame *frm;
	struct g2d_fmt *fmt;
	int ret = 0;

	/* Adjust all values accordingly to the hardware capabilities
	 * and chosen format. */
	ret = vidioc_try_fmt(file, prv, f);
	if (ret)
		return ret;
	vq = v4l2_m2m_get_vq(ctx->m2m_ctx, f->type);
	if (vb2_is_busy(vq)) {
		v4l2_err(&dev->v4l2_dev, "queue (%d) bust\n", f->type);
		return -EBUSY;
	}
	frm = get_frame(ctx, f->type);
	if (IS_ERR(frm))
		return PTR_ERR(frm);
	fmt = find_fmt(f);
	if (!fmt)
		return -EINVAL;
	frm->width	= f->fmt.pix.width;
	frm->height	= f->fmt.pix.height;
	frm->size	= f->fmt.pix.sizeimage;
	/* Reset crop settings */
	frm->o_width	= 0;
	frm->o_height	= 0;
	frm->c_width	= frm->width;
	frm->c_height	= frm->height;
	frm->right	= frm->width;
	frm->bottom	= frm->height;
	frm->fmt	= fmt;
	frm->stride	= f->fmt.pix.bytesperline;
	return 0;
}

static unsigned int g2d_poll(struct file *file, struct poll_table_struct *wait)
{
	struct g2d_ctx *ctx = fh2ctx(file->private_data);
	return v4l2_m2m_poll(file, ctx->m2m_ctx, wait);
}

static int g2d_mmap(struct file *file, struct vm_area_struct *vma)
{
	struct g2d_ctx *ctx = fh2ctx(file->private_data);
	return v4l2_m2m_mmap(file, ctx->m2m_ctx, vma);
}

static int vidioc_reqbufs(struct file *file, void *priv,
			struct v4l2_requestbuffers *reqbufs)
{
	struct g2d_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 g2d_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 g2d_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 g2d_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 g2d_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 g2d_ctx *ctx = priv;
	return v4l2_m2m_streamoff(file, ctx->m2m_ctx, type);
}

static int vidioc_cropcap(struct file *file, void *priv,
					struct v4l2_cropcap *cr)
{
	struct g2d_ctx *ctx = priv;
	struct g2d_frame *f;

	f = get_frame(ctx, cr->type);
	if (IS_ERR(f))
		return PTR_ERR(f);

	cr->bounds.left		= 0;
	cr->bounds.top		= 0;
	cr->bounds.width	= f->width;
	cr->bounds.height	= f->height;
	cr->defrect		= cr->bounds;
	return 0;
}

static int vidioc_g_crop(struct file *file, void *prv, struct v4l2_crop *cr)
{
	struct g2d_ctx *ctx = prv;
	struct g2d_frame *f;

	f = get_frame(ctx, cr->type);
	if (IS_ERR(f))
		return PTR_ERR(f);

	cr->c.left	= f->o_height;
	cr->c.top	= f->o_width;
	cr->c.width	= f->c_width;
	cr->c.height	= f->c_height;
	return 0;
}

static int vidioc_try_crop(struct file *file, void *prv, struct v4l2_crop *cr)
{
	struct g2d_ctx *ctx = prv;
	struct g2d_dev *dev = ctx->dev;
	struct g2d_frame *f;

	f = get_frame(ctx, cr->type);
	if (IS_ERR(f))
		return PTR_ERR(f);

	if (cr->c.top < 0 || cr->c.left < 0) {
		v4l2_err(&dev->v4l2_dev,
			"doesn't support negative values for top & left\n");
		return -EINVAL;
	}

	return 0;
}

static int vidioc_s_crop(struct file *file, void *prv, struct v4l2_crop *cr)
{
	struct g2d_ctx *ctx = prv;
	struct g2d_frame *f;
	int ret;

	ret = vidioc_try_crop(file, prv, cr);
	if (ret)
		return ret;
	f = get_frame(ctx, cr->type);
	if (IS_ERR(f))
		return PTR_ERR(f);

	f->c_width	= cr->c.width;
	f->c_height	= cr->c.height;
	f->o_width	= cr->c.left;
	f->o_height	= cr->c.top;
	f->bottom	= f->o_height + f->c_height;
	f->right	= f->o_width + f->c_width;
	return 0;
}

static void g2d_lock(void *prv)
{
	struct g2d_ctx *ctx = prv;
	struct g2d_dev *dev = ctx->dev;
	mutex_lock(&dev->mutex);
}

static void g2d_unlock(void *prv)
{
	struct g2d_ctx *ctx = prv;
	struct g2d_dev *dev = ctx->dev;
	mutex_unlock(&dev->mutex);
}

static void job_abort(void *prv)
{
	struct g2d_ctx *ctx = prv;
	struct g2d_dev *dev = ctx->dev;
	int ret;

	if (dev->curr == 0) /* No job currently running */
		return;

	ret = wait_event_timeout(dev->irq_queue,
		dev->curr == 0,
		msecs_to_jiffies(G2D_TIMEOUT));
}

static void device_run(void *prv)
{
	struct g2d_ctx *ctx = prv;
	struct g2d_dev *dev = ctx->dev;
	struct vb2_buffer *src, *dst;
	u32 cmd = 0;

	dev->curr = ctx;

	src = v4l2_m2m_next_src_buf(ctx->m2m_ctx);
	dst = v4l2_m2m_next_dst_buf(ctx->m2m_ctx);

	clk_enable(dev->gate);
	g2d_reset(dev);

	g2d_set_src_size(dev, &ctx->in);
	g2d_set_src_addr(dev, vb2_dma_contig_plane_dma_addr(src, 0));

	g2d_set_dst_size(dev, &ctx->out);
	g2d_set_dst_addr(dev, vb2_dma_contig_plane_dma_addr(dst, 0));

	g2d_set_rop4(dev, ctx->rop);
	if (ctx->in.c_width != ctx->out.c_width ||
		ctx->in.c_height != ctx->out.c_height)
		cmd |= g2d_cmd_stretch(1);
	g2d_set_cmd(dev, cmd);
	g2d_start(dev);
}

static irqreturn_t g2d_isr(int irq, void *prv)
{
	struct g2d_dev *dev = prv;
	struct g2d_ctx *ctx = dev->curr;
	struct vb2_buffer *src, *dst;

	g2d_clear_int(dev);
	clk_disable(dev->gate);

	BUG_ON(ctx == 0);

	src = v4l2_m2m_src_buf_remove(ctx->m2m_ctx);
	dst = v4l2_m2m_dst_buf_remove(ctx->m2m_ctx);

	BUG_ON(src == 0);
	BUG_ON(dst == 0);

	v4l2_m2m_buf_done(src, VB2_BUF_STATE_DONE);
	v4l2_m2m_buf_done(dst, VB2_BUF_STATE_DONE);
	v4l2_m2m_job_finish(dev->m2m_dev, ctx->m2m_ctx);

	dev->curr = 0;
	wake_up(&dev->irq_queue);
	return IRQ_HANDLED;
}

static const struct v4l2_file_operations g2d_fops = {
	.owner		= THIS_MODULE,
	.open		= g2d_open,
	.release	= g2d_release,
	.poll		= g2d_poll,
	.unlocked_ioctl	= video_ioctl2,
	.mmap		= g2d_mmap,
};

static const struct v4l2_ioctl_ops g2d_ioctl_ops = {
	.vidioc_querycap	= vidioc_querycap,

	.vidioc_enum_fmt_vid_cap	= vidioc_enum_fmt,
	.vidioc_g_fmt_vid_cap		= vidioc_g_fmt,
	.vidioc_try_fmt_vid_cap		= vidioc_try_fmt,
	.vidioc_s_fmt_vid_cap		= vidioc_s_fmt,

	.vidioc_enum_fmt_vid_out	= vidioc_enum_fmt,
	.vidioc_g_fmt_vid_out		= vidioc_g_fmt,
	.vidioc_try_fmt_vid_out		= vidioc_try_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_g_crop			= vidioc_g_crop,
	.vidioc_s_crop			= vidioc_s_crop,
	.vidioc_cropcap			= vidioc_cropcap,
};

static struct video_device g2d_videodev = {
	.name		= G2D_NAME,
	.fops		= &g2d_fops,
	.ioctl_ops	= &g2d_ioctl_ops,
	.minor		= -1,
	.release	= video_device_release,
};

static struct v4l2_m2m_ops g2d_m2m_ops = {
	.device_run	= device_run,
	.job_abort	= job_abort,
	.lock		= g2d_lock,
	.unlock		= g2d_unlock,
};

static int g2d_probe(struct platform_device *pdev)
{
	struct g2d_dev *dev;
	struct video_device *vfd;
	struct resource *res;
	int ret = 0;

	dev = kzalloc(sizeof(*dev), GFP_KERNEL);
	if (!dev)
		return -ENOMEM;
	spin_lock_init(&dev->irqlock);
	mutex_init(&dev->mutex);
	atomic_set(&dev->num_inst, 0);
	init_waitqueue_head(&dev->irq_queue);

	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	if (!res) {
		dev_err(&pdev->dev, "failed to find registers\n");
		ret = -ENOENT;
		goto free_dev;
	}

	dev->res_regs = request_mem_region(res->start, resource_size(res),
						dev_name(&pdev->dev));

	if (!dev->res_regs) {
		dev_err(&pdev->dev, "failed to obtain register region\n");
		ret = -ENOENT;
		goto free_dev;
	}

	dev->regs = ioremap(res->start, resource_size(res));
	if (!dev->regs) {
		dev_err(&pdev->dev, "failed to map registers\n");
		ret = -ENOENT;
		goto rel_res_regs;
	}

	dev->clk = clk_get(&pdev->dev, "sclk_fimg2d");
	if (IS_ERR_OR_NULL(dev->clk)) {
		dev_err(&pdev->dev, "failed to get g2d clock\n");
		ret = -ENXIO;
		goto unmap_regs;
	}

	dev->gate = clk_get(&pdev->dev, "fimg2d");
	if (IS_ERR_OR_NULL(dev->gate)) {
		dev_err(&pdev->dev, "failed to get g2d clock gate\n");
		ret = -ENXIO;
		goto put_clk;
	}

	res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
	if (!res) {
		dev_err(&pdev->dev, "failed to find IRQ\n");
		ret = -ENXIO;
		goto put_clk_gate;
	}

	dev->irq = res->start;

	ret = request_irq(dev->irq, g2d_isr, 0, pdev->name, dev);
	if (ret) {
		dev_err(&pdev->dev, "failed to install IRQ\n");
		goto put_clk_gate;
	}

	dev->alloc_ctx = vb2_dma_contig_init_ctx(&pdev->dev);
	if (IS_ERR(dev->alloc_ctx)) {
		ret = PTR_ERR(dev->alloc_ctx);
		goto rel_irq;
	}

	ret = v4l2_device_register(&pdev->dev, &dev->v4l2_dev);
	if (ret)
		goto alloc_ctx_cleanup;
	vfd = video_device_alloc();
	if (!vfd) {
		v4l2_err(&dev->v4l2_dev, "Failed to allocate video device\n");
		ret = -ENOMEM;
		goto unreg_v4l2_dev;
	}
	*vfd = g2d_videodev;
	vfd->lock = &dev->mutex;
	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", g2d_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(&g2d_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 unreg_video_dev;
	}

	def_frame.stride = (def_frame.width * def_frame.fmt->depth) >> 3;

	return 0;

unreg_video_dev:
	video_unregister_device(dev->vfd);
rel_vdev:
	video_device_release(vfd);
unreg_v4l2_dev:
	v4l2_device_unregister(&dev->v4l2_dev);
alloc_ctx_cleanup:
	vb2_dma_contig_cleanup_ctx(dev->alloc_ctx);
rel_irq:
	free_irq(dev->irq, dev);
put_clk_gate:
	clk_put(dev->gate);
put_clk:
	clk_put(dev->clk);
unmap_regs:
	iounmap(dev->regs);
rel_res_regs:
	release_resource(dev->res_regs);
free_dev:
	kfree(dev);
	return ret;
}

static int g2d_remove(struct platform_device *pdev)
{
	struct g2d_dev *dev = (struct g2d_dev *)platform_get_drvdata(pdev);

	v4l2_info(&dev->v4l2_dev, "Removing " G2D_NAME);
	v4l2_m2m_release(dev->m2m_dev);
	video_unregister_device(dev->vfd);
	v4l2_device_unregister(&dev->v4l2_dev);
	vb2_dma_contig_cleanup_ctx(dev->alloc_ctx);
	free_irq(dev->irq, dev);
	clk_put(dev->gate);
	clk_put(dev->clk);
	iounmap(dev->regs);
	release_resource(dev->res_regs);
	kfree(dev);
	return 0;
}

static struct platform_driver g2d_pdrv = {
	.probe		= g2d_probe,
	.remove		= g2d_remove,
	.driver		= {
		.name = G2D_NAME,
		.owner = THIS_MODULE,
	},
};

module_platform_driver(g2d_pdrv);

MODULE_AUTHOR("Kamil Debski <k.debski@samsung.com>");
MODULE_DESCRIPTION("S5P G2D 2d graphics accelerator driver");
MODULE_LICENSE("GPL");
Commit	Line	Data
91884734 KD	1	/*
	2	* Samsung S5P G2D - 2D Graphics Accelerator Driver
	3	*
	4	* Copyright (c) 2011 Samsung Electronics Co., Ltd.
	5	* Kamil Debski, <k.debski@samsung.com>
	6	*
	7	* This program is free software; you can redistribute it and/or modify
	8	* it under the terms of the GNU General Public License as published by the
	9	* Free Software Foundation; either version 2 of the
	10	* License, or (at your option) any later version
	11	*/
	12
	13	#include <linux/module.h>
	14	#include <linux/fs.h>
	15	#include <linux/version.h>
	16	#include <linux/timer.h>
	17	#include <linux/sched.h>
	18	#include <linux/slab.h>
	19	#include <linux/clk.h>
	20	#include <linux/interrupt.h>
	21
	22	#include <linux/platform_device.h>
	23	#include <media/v4l2-mem2mem.h>
	24	#include <media/v4l2-device.h>
	25	#include <media/v4l2-ioctl.h>
	26	#include <media/videobuf2-core.h>
	27	#include <media/videobuf2-dma-contig.h>
	28
	29	#include "g2d.h"
	30	#include "g2d-regs.h"
	31
	32	#define fh2ctx(__fh) container_of(__fh, struct g2d_ctx, fh)
	33
	34	static struct g2d_fmt formats[] = {
	35	{
	36	.name = "XRGB_8888",
	37	.fourcc = V4L2_PIX_FMT_RGB32,
	38	.depth = 32,
	39	.hw = COLOR_MODE(ORDER_XRGB, MODE_XRGB_8888),
	40	},
	41	{
	42	.name = "RGB_565",
	43	.fourcc = V4L2_PIX_FMT_RGB565X,
	44	.depth = 16,
	45	.hw = COLOR_MODE(ORDER_XRGB, MODE_RGB_565),
	46	},
	47	{
	48	.name = "XRGB_1555",
	49	.fourcc = V4L2_PIX_FMT_RGB555X,
	50	.depth = 16,
	51	.hw = COLOR_MODE(ORDER_XRGB, MODE_XRGB_1555),
	52	},
	53	{
	54	.name = "XRGB_4444",
	55	.fourcc = V4L2_PIX_FMT_RGB444,
	56	.depth = 16,
	57	.hw = COLOR_MODE(ORDER_XRGB, MODE_XRGB_4444),
	58	},
	59	{
	60	.name = "PACKED_RGB_888",
	61	.fourcc = V4L2_PIX_FMT_RGB24,
	62	.depth = 24,
	63	.hw = COLOR_MODE(ORDER_XRGB, MODE_PACKED_RGB_888),
	64	},
65	};
66	#define NUM_FORMATS ARRAY_SIZE(formats)
67
68	struct g2d_frame def_frame = {
69	.width = DEFAULT_WIDTH,
70	.height = DEFAULT_HEIGHT,
71	.c_width = DEFAULT_WIDTH,
72	.c_height = DEFAULT_HEIGHT,
73	.o_width = 0,
74	.o_height = 0,
75	.fmt = &formats[0],
76	.right = DEFAULT_WIDTH,
77	.bottom = DEFAULT_HEIGHT,
78	};
79
80	struct g2d_fmt find_fmt(struct v4l2_format f)
81	{
82	unsigned int i;
83	for (i = 0; i < NUM_FORMATS; i++) {
84	if (formats[i].fourcc == f->fmt.pix.pixelformat)
85	return &formats[i];
86	}
87	return NULL;
88	}
89
90
91	static struct g2d_frame get_frame(struct g2d_ctx ctx,
92	enum v4l2_buf_type type)
93	{
94	switch (type) {
95	case V4L2_BUF_TYPE_VIDEO_OUTPUT:
96	return &ctx->in;
97	case V4L2_BUF_TYPE_VIDEO_CAPTURE:
98	return &ctx->out;
99	default:
100	return ERR_PTR(-EINVAL);
101	}
102	}
103
104	static int g2d_queue_setup(struct vb2_queue vq, const struct v4l2_format fmt,
105	unsigned int nbuffers, unsigned int nplanes,
106	unsigned int sizes[], void *alloc_ctxs[])
107	{
108	struct g2d_ctx *ctx = vb2_get_drv_priv(vq);
109	struct g2d_frame *f = get_frame(ctx, vq->type);
110
111	if (IS_ERR(f))
112	return PTR_ERR(f);
113
114	sizes[0] = f->size;
115	*nplanes = 1;
116	alloc_ctxs[0] = ctx->dev->alloc_ctx;
117
118	if (*nbuffers == 0)
119	*nbuffers = 1;
120
121	return 0;
122	}
123
124	static int g2d_buf_prepare(struct vb2_buffer *vb)
125	{
126	struct g2d_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue);
127	struct g2d_frame *f = get_frame(ctx, vb->vb2_queue->type);
128
129	if (IS_ERR(f))
130	return PTR_ERR(f);
131	vb2_set_plane_payload(vb, 0, f->size);
132	return 0;
133	}
134
135	static void g2d_buf_queue(struct vb2_buffer *vb)
136	{
137	struct g2d_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue);
138	v4l2_m2m_buf_queue(ctx->m2m_ctx, vb);
139	}
140
141
142	static struct vb2_ops g2d_qops = {
143	.queue_setup = g2d_queue_setup,
144	.buf_prepare = g2d_buf_prepare,
145	.buf_queue = g2d_buf_queue,
146	};
147
148	static int queue_init(void priv, struct vb2_queue src_vq,
149	struct vb2_queue *dst_vq)
150	{
151	struct g2d_ctx *ctx = priv;
152	int ret;
153
154	memset(src_vq, 0, sizeof(*src_vq));
155	src_vq->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
156	src_vq->io_modes = VB2_MMAP \| VB2_USERPTR;
157	src_vq->drv_priv = ctx;
158	src_vq->ops = &g2d_qops;
159	src_vq->mem_ops = &vb2_dma_contig_memops;
160	src_vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer);
161
162	ret = vb2_queue_init(src_vq);
163	if (ret)
164	return ret;
165
166	memset(dst_vq, 0, sizeof(*dst_vq));
167	dst_vq->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
168	dst_vq->io_modes = VB2_MMAP \| VB2_USERPTR;
169	dst_vq->drv_priv = ctx;
170	dst_vq->ops = &g2d_qops;
171	dst_vq->mem_ops = &vb2_dma_contig_memops;
172	dst_vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer);
173
174	return vb2_queue_init(dst_vq);
175	}
176
177	static int g2d_s_ctrl(struct v4l2_ctrl *ctrl)
178	{
179	struct g2d_ctx *ctx = container_of(ctrl->handler, struct g2d_ctx,
180	ctrl_handler);
181	switch (ctrl->id) {
182	case V4L2_CID_COLORFX:
183	if (ctrl->val == V4L2_COLORFX_NEGATIVE)
184	ctx->rop = ROP4_INVERT;
185	else
186	ctx->rop = ROP4_COPY;
7f6cce69	187	break;
91884734 KD	188	default:
	189	v4l2_err(&ctx->dev->v4l2_dev, "unknown control\n");
	190	return -EINVAL;
	191	}
	192	return 0;
	193	}
	194
	195	static const struct v4l2_ctrl_ops g2d_ctrl_ops = {
	196	.s_ctrl = g2d_s_ctrl,
	197	};
	198
	199	int g2d_setup_ctrls(struct g2d_ctx *ctx)
	200	{
	201	struct g2d_dev *dev = ctx->dev;
	202
	203	v4l2_ctrl_handler_init(&ctx->ctrl_handler, 1);
	204	if (ctx->ctrl_handler.error) {
	205	v4l2_err(&dev->v4l2_dev, "v4l2_ctrl_handler_init failed\n");
	206	return ctx->ctrl_handler.error;
	207	}
	208
	209	v4l2_ctrl_new_std_menu(
	210	&ctx->ctrl_handler,
	211	&g2d_ctrl_ops,
	212	V4L2_CID_COLORFX,
	213	V4L2_COLORFX_NEGATIVE,
	214	~((1 << V4L2_COLORFX_NONE) \| (1 << V4L2_COLORFX_NEGATIVE)),
	215	V4L2_COLORFX_NONE);
	216
	217	if (ctx->ctrl_handler.error) {
	218	v4l2_err(&dev->v4l2_dev, "v4l2_ctrl_handler_init failed\n");
	219	return ctx->ctrl_handler.error;
	220	}
	221
	222	return 0;
	223	}
	224
	225	static int g2d_open(struct file *file)
	226	{
	227	struct g2d_dev *dev = video_drvdata(file);
	228	struct g2d_ctx *ctx = NULL;
	229	int ret = 0;
	230
	231	ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
	232	if (!ctx)
	233	return -ENOMEM;
	234	ctx->dev = dev;
	235	/* Set default formats */
	236	ctx->in = def_frame;
	237	ctx->out = def_frame;
	238
	239	ctx->m2m_ctx = v4l2_m2m_ctx_init(dev->m2m_dev, ctx, &queue_init);
	240	if (IS_ERR(ctx->m2m_ctx)) {
	241	ret = PTR_ERR(ctx->m2m_ctx);
	242	kfree(ctx);
	243	return ret;
	244	}
	245	v4l2_fh_init(&ctx->fh, video_devdata(file));
	246	file->private_data = &ctx->fh;
	247	v4l2_fh_add(&ctx->fh);
	248
	249	g2d_setup_ctrls(ctx);
	250
	251	/* Write the default values to the ctx struct */
252	v4l2_ctrl_handler_setup(&ctx->ctrl_handler);
253
254	ctx->fh.ctrl_handler = &ctx->ctrl_handler;
255
256	v4l2_info(&dev->v4l2_dev, "instance opened\n");
257	return 0;
258	}
259
260	static int g2d_release(struct file *file)
261	{
262	struct g2d_dev *dev = video_drvdata(file);
263	struct g2d_ctx *ctx = fh2ctx(file->private_data);
264
265	v4l2_ctrl_handler_free(&ctx->ctrl_handler);
266	v4l2_fh_del(&ctx->fh);
267	v4l2_fh_exit(&ctx->fh);
268	kfree(ctx);
269	v4l2_info(&dev->v4l2_dev, "instance closed\n");
270	return 0;
271	}
272
273
274	static int vidioc_querycap(struct file file, void priv,
275	struct v4l2_capability *cap)
276	{
277	strncpy(cap->driver, G2D_NAME, sizeof(cap->driver) - 1);
278	strncpy(cap->card, G2D_NAME, sizeof(cap->card) - 1);
279	cap->bus_info[0] = 0;
280	cap->version = KERNEL_VERSION(1, 0, 0);
281	cap->capabilities = V4L2_CAP_VIDEO_CAPTURE \| V4L2_CAP_VIDEO_OUTPUT
282	\| V4L2_CAP_STREAMING;
283	return 0;
284	}
285
286	static int vidioc_enum_fmt(struct file file, void prv, struct v4l2_fmtdesc *f)
287	{
288	struct g2d_fmt *fmt;
289	if (f->index >= NUM_FORMATS)
290	return -EINVAL;
291	fmt = &formats[f->index];
292	f->pixelformat = fmt->fourcc;
293	strncpy(f->description, fmt->name, sizeof(f->description) - 1);
294	return 0;
295	}
296
297	static int vidioc_g_fmt(struct file file, void prv, struct v4l2_format *f)
298	{
299	struct g2d_ctx *ctx = prv;
300	struct vb2_queue *vq;
301	struct g2d_frame *frm;
302
303	vq = v4l2_m2m_get_vq(ctx->m2m_ctx, f->type);
304	if (!vq)
305	return -EINVAL;
306	frm = get_frame(ctx, f->type);
307	if (IS_ERR(frm))
308	return PTR_ERR(frm);
309
310	f->fmt.pix.width = frm->width;
311	f->fmt.pix.height = frm->height;
312	f->fmt.pix.field = V4L2_FIELD_NONE;
313	f->fmt.pix.pixelformat = frm->fmt->fourcc;
314	f->fmt.pix.bytesperline = (frm->width * frm->fmt->depth) >> 3;
315	f->fmt.pix.sizeimage = frm->size;
316	return 0;
317	}
318
319	static int vidioc_try_fmt(struct file file, void prv, struct v4l2_format *f)
320	{
321	struct g2d_fmt *fmt;
322	enum v4l2_field *field;
323
324	fmt = find_fmt(f);
325	if (!fmt)
326	return -EINVAL;
327
328	field = &f->fmt.pix.field;
329	if (*field == V4L2_FIELD_ANY)
330	*field = V4L2_FIELD_NONE;
331	else if (*field != V4L2_FIELD_NONE)
332	return -EINVAL;
333
334	if (f->fmt.pix.width > MAX_WIDTH)
335	f->fmt.pix.width = MAX_WIDTH;
336	if (f->fmt.pix.height > MAX_HEIGHT)
337	f->fmt.pix.height = MAX_HEIGHT;
338
339	if (f->fmt.pix.width < 1)
340	f->fmt.pix.width = 1;
341	if (f->fmt.pix.height < 1)
342	f->fmt.pix.height = 1;
343
344	f->fmt.pix.bytesperline = (f->fmt.pix.width * fmt->depth) >> 3;
345	f->fmt.pix.sizeimage = f->fmt.pix.height * f->fmt.pix.bytesperline;
346	return 0;
347	}
348
349	static int vidioc_s_fmt(struct file file, void prv, struct v4l2_format *f)
350	{
351	struct g2d_ctx *ctx = prv;
352	struct g2d_dev *dev = ctx->dev;
353	struct vb2_queue *vq;
354	struct g2d_frame *frm;
355	struct g2d_fmt *fmt;
356	int ret = 0;
357
358	/* Adjust all values accordingly to the hardware capabilities
359	* and chosen format. */
360	ret = vidioc_try_fmt(file, prv, f);
361	if (ret)
362	return ret;
363	vq = v4l2_m2m_get_vq(ctx->m2m_ctx, f->type);
364	if (vb2_is_busy(vq)) {
365	v4l2_err(&dev->v4l2_dev, "queue (%d) bust\n", f->type);
366	return -EBUSY;
367	}
368	frm = get_frame(ctx, f->type);
369	if (IS_ERR(frm))
370	return PTR_ERR(frm);
371	fmt = find_fmt(f);
372	if (!fmt)
373	return -EINVAL;
374	frm->width = f->fmt.pix.width;
375	frm->height = f->fmt.pix.height;
376	frm->size = f->fmt.pix.sizeimage;
377	/* Reset crop settings */
378	frm->o_width = 0;
379	frm->o_height = 0;
380	frm->c_width = frm->width;
381	frm->c_height = frm->height;
382	frm->right = frm->width;
383	frm->bottom = frm->height;
384	frm->fmt = fmt;
385	frm->stride = f->fmt.pix.bytesperline;
386	return 0;
387	}
388
389	static unsigned int g2d_poll(struct file file, struct poll_table_struct wait)
390	{
391	struct g2d_ctx *ctx = fh2ctx(file->private_data);
392	return v4l2_m2m_poll(file, ctx->m2m_ctx, wait);
393	}
394
395	static int g2d_mmap(struct file file, struct vm_area_struct vma)
396	{
397	struct g2d_ctx *ctx = fh2ctx(file->private_data);
398	return v4l2_m2m_mmap(file, ctx->m2m_ctx, vma);
399	}
400
401	static int vidioc_reqbufs(struct file file, void priv,
402	struct v4l2_requestbuffers *reqbufs)
403	{
404	struct g2d_ctx *ctx = priv;
405	return v4l2_m2m_reqbufs(file, ctx->m2m_ctx, reqbufs);
406	}
407
408	static int vidioc_querybuf(struct file file, void priv,
409	struct v4l2_buffer *buf)
410	{
411	struct g2d_ctx *ctx = priv;
412	return v4l2_m2m_querybuf(file, ctx->m2m_ctx, buf);
413	}
414
415	static int vidioc_qbuf(struct file file, void priv, struct v4l2_buffer *buf)
416	{
417	struct g2d_ctx *ctx = priv;
418	return v4l2_m2m_qbuf(file, ctx->m2m_ctx, buf);
419	}
420
421	static int vidioc_dqbuf(struct file file, void priv, struct v4l2_buffer *buf)
422	{
423	struct g2d_ctx *ctx = priv;
424	return v4l2_m2m_dqbuf(file, ctx->m2m_ctx, buf);
425	}
426
427
428	static int vidioc_streamon(struct file file, void priv,
429	enum v4l2_buf_type type)
430	{
431	struct g2d_ctx *ctx = priv;
432	return v4l2_m2m_streamon(file, ctx->m2m_ctx, type);
433	}
434
435	static int vidioc_streamoff(struct file file, void priv,
436	enum v4l2_buf_type type)
437	{
438	struct g2d_ctx *ctx = priv;
439	return v4l2_m2m_streamoff(file, ctx->m2m_ctx, type);
440	}
441
442	static int vidioc_cropcap(struct file file, void priv,
443	struct v4l2_cropcap *cr)
444	{
445	struct g2d_ctx *ctx = priv;
446	struct g2d_frame *f;
447
448	f = get_frame(ctx, cr->type);
449	if (IS_ERR(f))
450	return PTR_ERR(f);
451
452	cr->bounds.left = 0;
453	cr->bounds.top = 0;
454	cr->bounds.width = f->width;
455	cr->bounds.height = f->height;
456	cr->defrect = cr->bounds;
457	return 0;
458	}
459
460	static int vidioc_g_crop(struct file file, void prv, struct v4l2_crop *cr)
461	{
462	struct g2d_ctx *ctx = prv;
463	struct g2d_frame *f;
464
465	f = get_frame(ctx, cr->type);
466	if (IS_ERR(f))
467	return PTR_ERR(f);
468
469	cr->c.left = f->o_height;
470	cr->c.top = f->o_width;
471	cr->c.width = f->c_width;
472	cr->c.height = f->c_height;
473	return 0;
474	}
475
476	static int vidioc_try_crop(struct file file, void prv, struct v4l2_crop *cr)
477	{
478	struct g2d_ctx *ctx = prv;
479	struct g2d_dev *dev = ctx->dev;
480	struct g2d_frame *f;
481
482	f = get_frame(ctx, cr->type);
483	if (IS_ERR(f))
484	return PTR_ERR(f);
485
486	if (cr->c.top < 0 \|\| cr->c.left < 0) {
487	v4l2_err(&dev->v4l2_dev,
488	"doesn't support negative values for top & left\n");
489	return -EINVAL;
490	}
491
492	return 0;
493	}
494
495	static int vidioc_s_crop(struct file file, void prv, struct v4l2_crop *cr)
496	{
497	struct g2d_ctx *ctx = prv;
498	struct g2d_frame *f;
499	int ret;
500
501	ret = vidioc_try_crop(file, prv, cr);
502	if (ret)
503	return ret;
504	f = get_frame(ctx, cr->type);
505	if (IS_ERR(f))
506	return PTR_ERR(f);
507
508	f->c_width = cr->c.width;
509	f->c_height = cr->c.height;
510	f->o_width = cr->c.left;
511	f->o_height = cr->c.top;
512	f->bottom = f->o_height + f->c_height;
513	f->right = f->o_width + f->c_width;
514	return 0;
515	}
516
517	static void g2d_lock(void *prv)
518	{
519	struct g2d_ctx *ctx = prv;
520	struct g2d_dev *dev = ctx->dev;
521	mutex_lock(&dev->mutex);
522	}
523
524	static void g2d_unlock(void *prv)
525	{
526	struct g2d_ctx *ctx = prv;
527	struct g2d_dev *dev = ctx->dev;
528	mutex_unlock(&dev->mutex);
529	}
530
531	static void job_abort(void *prv)
532	{
533	struct g2d_ctx *ctx = prv;
534	struct g2d_dev *dev = ctx->dev;
535	int ret;
536
537	if (dev->curr == 0) /* No job currently running */
538	return;
539
540	ret = wait_event_timeout(dev->irq_queue,
541	dev->curr == 0,
542	msecs_to_jiffies(G2D_TIMEOUT));
543	}
544
545	static void device_run(void *prv)
546	{
547	struct g2d_ctx *ctx = prv;
548	struct g2d_dev *dev = ctx->dev;
549	struct vb2_buffer src, dst;
550	u32 cmd = 0;
551
552	dev->curr = ctx;
553
554	src = v4l2_m2m_next_src_buf(ctx->m2m_ctx);
555	dst = v4l2_m2m_next_dst_buf(ctx->m2m_ctx);
556
557	clk_enable(dev->gate);
558	g2d_reset(dev);
559
560	g2d_set_src_size(dev, &ctx->in);
561	g2d_set_src_addr(dev, vb2_dma_contig_plane_dma_addr(src, 0));
562
563	g2d_set_dst_size(dev, &ctx->out);
564	g2d_set_dst_addr(dev, vb2_dma_contig_plane_dma_addr(dst, 0));
565
566	g2d_set_rop4(dev, ctx->rop);
567	if (ctx->in.c_width != ctx->out.c_width \|\|
568	ctx->in.c_height != ctx->out.c_height)
569	cmd \|= g2d_cmd_stretch(1);
570	g2d_set_cmd(dev, cmd);
571	g2d_start(dev);
572	}
573
574	static irqreturn_t g2d_isr(int irq, void *prv)
575	{
576	struct g2d_dev *dev = prv;
577	struct g2d_ctx *ctx = dev->curr;
578	struct vb2_buffer src, dst;
579
580	g2d_clear_int(dev);
581	clk_disable(dev->gate);
582
583	BUG_ON(ctx == 0);
584
585	src = v4l2_m2m_src_buf_remove(ctx->m2m_ctx);
586	dst = v4l2_m2m_dst_buf_remove(ctx->m2m_ctx);
587
588	BUG_ON(src == 0);
589	BUG_ON(dst == 0);
590
591	v4l2_m2m_buf_done(src, VB2_BUF_STATE_DONE);
592	v4l2_m2m_buf_done(dst, VB2_BUF_STATE_DONE);
593	v4l2_m2m_job_finish(dev->m2m_dev, ctx->m2m_ctx);
594
595	dev->curr = 0;
596	wake_up(&dev->irq_queue);
597	return IRQ_HANDLED;
598	}
599
600	static const struct v4l2_file_operations g2d_fops = {
601	.owner = THIS_MODULE,
602	.open = g2d_open,
603	.release = g2d_release,
604	.poll = g2d_poll,
605	.unlocked_ioctl = video_ioctl2,
606	.mmap = g2d_mmap,
607	};
608
609	static const struct v4l2_ioctl_ops g2d_ioctl_ops = {
610	.vidioc_querycap = vidioc_querycap,
611
612	.vidioc_enum_fmt_vid_cap = vidioc_enum_fmt,
613	.vidioc_g_fmt_vid_cap = vidioc_g_fmt,
614	.vidioc_try_fmt_vid_cap = vidioc_try_fmt,
615	.vidioc_s_fmt_vid_cap = vidioc_s_fmt,
616
617	.vidioc_enum_fmt_vid_out = vidioc_enum_fmt,
618	.vidioc_g_fmt_vid_out = vidioc_g_fmt,
619	.vidioc_try_fmt_vid_out = vidioc_try_fmt,
620	.vidioc_s_fmt_vid_out = vidioc_s_fmt,
621
622	.vidioc_reqbufs = vidioc_reqbufs,
623	.vidioc_querybuf = vidioc_querybuf,
624
625	.vidioc_qbuf = vidioc_qbuf,
626	.vidioc_dqbuf = vidioc_dqbuf,
627
628	.vidioc_streamon = vidioc_streamon,
629	.vidioc_streamoff = vidioc_streamoff,
630
631	.vidioc_g_crop = vidioc_g_crop,
632	.vidioc_s_crop = vidioc_s_crop,
633	.vidioc_cropcap = vidioc_cropcap,
634	};
635
636	static struct video_device g2d_videodev = {
637	.name = G2D_NAME,
638	.fops = &g2d_fops,
639	.ioctl_ops = &g2d_ioctl_ops,
640	.minor = -1,
641	.release = video_device_release,
642	};
643
644	static struct v4l2_m2m_ops g2d_m2m_ops = {
645	.device_run = device_run,
646	.job_abort = job_abort,
647	.lock = g2d_lock,
648	.unlock = g2d_unlock,
649	};
650
651	static int g2d_probe(struct platform_device *pdev)
652	{
653	struct g2d_dev *dev;
654	struct video_device *vfd;
655	struct resource *res;
656	int ret = 0;
657
658	dev = kzalloc(sizeof(*dev), GFP_KERNEL);
659	if (!dev)
660	return -ENOMEM;
661	spin_lock_init(&dev->irqlock);
662	mutex_init(&dev->mutex);
663	atomic_set(&dev->num_inst, 0);
664	init_waitqueue_head(&dev->irq_queue);
665
666	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
667	if (!res) {
668	dev_err(&pdev->dev, "failed to find registers\n");
669	ret = -ENOENT;
670	goto free_dev;
671	}
672
673	dev->res_regs = request_mem_region(res->start, resource_size(res),
674	dev_name(&pdev->dev));
675
676	if (!dev->res_regs) {
677	dev_err(&pdev->dev, "failed to obtain register region\n");
678	ret = -ENOENT;
679	goto free_dev;
680	}
681
682	dev->regs = ioremap(res->start, resource_size(res));
683	if (!dev->regs) {
684	dev_err(&pdev->dev, "failed to map registers\n");
685	ret = -ENOENT;
686	goto rel_res_regs;
687	}
688
689	dev->clk = clk_get(&pdev->dev, "sclk_fimg2d");
690	if (IS_ERR_OR_NULL(dev->clk)) {
691	dev_err(&pdev->dev, "failed to get g2d clock\n");
692	ret = -ENXIO;
693	goto unmap_regs;
694	}
695
696	dev->gate = clk_get(&pdev->dev, "fimg2d");
697	if (IS_ERR_OR_NULL(dev->gate)) {
698	dev_err(&pdev->dev, "failed to get g2d clock gate\n");
699	ret = -ENXIO;
700	goto put_clk;
701	}
702
703	res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
704	if (!res) {
705	dev_err(&pdev->dev, "failed to find IRQ\n");
706	ret = -ENXIO;
707	goto put_clk_gate;
708	}
709
710	dev->irq = res->start;
711
712	ret = request_irq(dev->irq, g2d_isr, 0, pdev->name, dev);
713	if (ret) {
714	dev_err(&pdev->dev, "failed to install IRQ\n");
715	goto put_clk_gate;
716	}
717
718	dev->alloc_ctx = vb2_dma_contig_init_ctx(&pdev->dev);
719	if (IS_ERR(dev->alloc_ctx)) {
720	ret = PTR_ERR(dev->alloc_ctx);
721	goto rel_irq;
722	}
723
724	ret = v4l2_device_register(&pdev->dev, &dev->v4l2_dev);
725	if (ret)
726	goto alloc_ctx_cleanup;
727	vfd = video_device_alloc();
728	if (!vfd) {
729	v4l2_err(&dev->v4l2_dev, "Failed to allocate video device\n");
730	ret = -ENOMEM;
731	goto unreg_v4l2_dev;
732	}
733	*vfd = g2d_videodev;
734	vfd->lock = &dev->mutex;
735	ret = video_register_device(vfd, VFL_TYPE_GRABBER, 0);
736	if (ret) {
737	v4l2_err(&dev->v4l2_dev, "Failed to register video device\n");
738	goto rel_vdev;
739	}
740	video_set_drvdata(vfd, dev);
741	snprintf(vfd->name, sizeof(vfd->name), "%s", g2d_videodev.name);
742	dev->vfd = vfd;
743	v4l2_info(&dev->v4l2_dev, "device registered as /dev/video%d\n",
744	vfd->num);
745	platform_set_drvdata(pdev, dev);
746	dev->m2m_dev = v4l2_m2m_init(&g2d_m2m_ops);
747	if (IS_ERR(dev->m2m_dev)) {
748	v4l2_err(&dev->v4l2_dev, "Failed to init mem2mem device\n");
749	ret = PTR_ERR(dev->m2m_dev);
750	goto unreg_video_dev;
751	}
752
753	def_frame.stride = (def_frame.width * def_frame.fmt->depth) >> 3;
754
755	return 0;
756
757	unreg_video_dev:
758	video_unregister_device(dev->vfd);
759	rel_vdev:
760	video_device_release(vfd);
761	unreg_v4l2_dev:
762	v4l2_device_unregister(&dev->v4l2_dev);
763	alloc_ctx_cleanup:
764	vb2_dma_contig_cleanup_ctx(dev->alloc_ctx);
765	rel_irq:
766	free_irq(dev->irq, dev);
767	put_clk_gate:
768	clk_put(dev->gate);
769	put_clk:
770	clk_put(dev->clk);
771	unmap_regs:
772	iounmap(dev->regs);
773	rel_res_regs:
774	release_resource(dev->res_regs);
775	free_dev:
776	kfree(dev);
777	return ret;
778	}
779
780	static int g2d_remove(struct platform_device *pdev)
781	{
782	struct g2d_dev dev = (struct g2d_dev )platform_get_drvdata(pdev);
783
784	v4l2_info(&dev->v4l2_dev, "Removing " G2D_NAME);
785	v4l2_m2m_release(dev->m2m_dev);
786	video_unregister_device(dev->vfd);
787	v4l2_device_unregister(&dev->v4l2_dev);
788	vb2_dma_contig_cleanup_ctx(dev->alloc_ctx);
789	free_irq(dev->irq, dev);
790	clk_put(dev->gate);
791	clk_put(dev->clk);
792	iounmap(dev->regs);
793	release_resource(dev->res_regs);
794	kfree(dev);
795	return 0;
796	}
797
798	static struct platform_driver g2d_pdrv = {
799	.probe = g2d_probe,
800	.remove = g2d_remove,
801	.driver = {
802	.name = G2D_NAME,
803	.owner = THIS_MODULE,
804	},
805	};
806
1d6629b1	807	module_platform_driver(g2d_pdrv);
91884734 KD	808
	809	MODULE_AUTHOR("Kamil Debski <k.debski@samsung.com>");
	810	MODULE_DESCRIPTION("S5P G2D 2d graphics accelerator driver");
	811	MODULE_LICENSE("GPL");