// SPDX-License-Identifier: GPL-2.0
/*
* Allwinner sun8i DE2 rotation driver
*
* Copyright (C) 2020 Jernej Skrabec <[email protected]>
*/
#include <linux/clk.h>
#include <linux/interrupt.h>
#include <linux/io.h>
#include <linux/iopoll.h>
#include <linux/mod_devicetable.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/pm_runtime.h>
#include <linux/reset.h>
#include <media/v4l2-device.h>
#include <media/v4l2-event.h>
#include <media/v4l2-ioctl.h>
#include <media/v4l2-mem2mem.h>
#include "sun8i-formats.h"
#include "sun8i-rotate.h"
static inline u32 rotate_read(struct rotate_dev *dev, u32 reg)
{
return readl(dev->base + reg);
}
static inline void rotate_write(struct rotate_dev *dev, u32 reg, u32 value)
{
writel(value, dev->base + reg);
}
static inline void rotate_set_bits(struct rotate_dev *dev, u32 reg, u32 bits)
{
writel(readl(dev->base + reg) | bits, dev->base + reg);
}
static void rotate_calc_addr_pitch(dma_addr_t buffer,
u32 bytesperline, u32 height,
const struct rotate_format *fmt,
dma_addr_t *addr, u32 *pitch)
{
u32 size;
int i;
for (i = 0; i < fmt->planes; i++) {
pitch[i] = bytesperline;
addr[i] = buffer;
if (i > 0)
pitch[i] /= fmt->hsub / fmt->bpp[i];
size = pitch[i] * height;
if (i > 0)
size /= fmt->vsub;
buffer += size;
}
}
static void rotate_device_run(void *priv)
{
struct rotate_ctx *ctx = priv;
struct rotate_dev *dev = ctx->dev;
struct vb2_v4l2_buffer *src, *dst;
const struct rotate_format *fmt;
dma_addr_t addr[3];
u32 val, pitch[3];
src = v4l2_m2m_next_src_buf(ctx->fh.m2m_ctx);
dst = v4l2_m2m_next_dst_buf(ctx->fh.m2m_ctx);
v4l2_m2m_buf_copy_metadata(src, dst, true);
val = ROTATE_GLB_CTL_MODE(ROTATE_MODE_COPY_ROTATE);
if (ctx->hflip)
val |= ROTATE_GLB_CTL_HFLIP;
if (ctx->vflip)
val |= ROTATE_GLB_CTL_VFLIP;
val |= ROTATE_GLB_CTL_ROTATION(ctx->rotate / 90);
if (ctx->rotate != 90 && ctx->rotate != 270)
val |= ROTATE_GLB_CTL_BURST_LEN(ROTATE_BURST_64);
else
val |= ROTATE_GLB_CTL_BURST_LEN(ROTATE_BURST_8);
rotate_write(dev, ROTATE_GLB_CTL, val);
fmt = rotate_find_format(ctx->src_fmt.pixelformat);
if (!fmt)
return;
rotate_write(dev, ROTATE_IN_FMT, ROTATE_IN_FMT_FORMAT(fmt->hw_format));
rotate_calc_addr_pitch(vb2_dma_contig_plane_dma_addr(&src->vb2_buf, 0),
ctx->src_fmt.bytesperline, ctx->src_fmt.height,
fmt, addr, pitch);
rotate_write(dev, ROTATE_IN_SIZE,
ROTATE_SIZE(ctx->src_fmt.width, ctx->src_fmt.height));
rotate_write(dev, ROTATE_IN_PITCH0, pitch[0]);
rotate_write(dev, ROTATE_IN_PITCH1, pitch[1]);
rotate_write(dev, ROTATE_IN_PITCH2, pitch[2]);
rotate_write(dev, ROTATE_IN_ADDRL0, addr[0]);
rotate_write(dev, ROTATE_IN_ADDRL1, addr[1]);
rotate_write(dev, ROTATE_IN_ADDRL2, addr[2]);
rotate_write(dev, ROTATE_IN_ADDRH0, 0);
rotate_write(dev, ROTATE_IN_ADDRH1, 0);
rotate_write(dev, ROTATE_IN_ADDRH2, 0);
fmt = rotate_find_format(ctx->dst_fmt.pixelformat);
if (!fmt)
return;
rotate_calc_addr_pitch(vb2_dma_contig_plane_dma_addr(&dst->vb2_buf, 0),
ctx->dst_fmt.bytesperline, ctx->dst_fmt.height,
fmt, addr, pitch);
rotate_write(dev, ROTATE_OUT_SIZE,
ROTATE_SIZE(ctx->dst_fmt.width, ctx->dst_fmt.height));
rotate_write(dev, ROTATE_OUT_PITCH0, pitch[0]);
rotate_write(dev, ROTATE_OUT_PITCH1, pitch[1]);
rotate_write(dev, ROTATE_OUT_PITCH2, pitch[2]);
rotate_write(dev, ROTATE_OUT_ADDRL0, addr[0]);
rotate_write(dev, ROTATE_OUT_ADDRL1, addr[1]);
rotate_write(dev, ROTATE_OUT_ADDRL2, addr[2]);
rotate_write(dev, ROTATE_OUT_ADDRH0, 0);
rotate_write(dev, ROTATE_OUT_ADDRH1, 0);
rotate_write(dev, ROTATE_OUT_ADDRH2, 0);
rotate_set_bits(dev, ROTATE_INT, ROTATE_INT_FINISH_IRQ_EN);
rotate_set_bits(dev, ROTATE_GLB_CTL, ROTATE_GLB_CTL_START);
}
static irqreturn_t rotate_irq(int irq, void *data)
{
struct vb2_v4l2_buffer *buffer;
struct rotate_dev *dev = data;
struct rotate_ctx *ctx;
unsigned int val;
ctx = v4l2_m2m_get_curr_priv(dev->m2m_dev);
if (!ctx) {
v4l2_err(&dev->v4l2_dev,
"Instance released before the end of transaction\n");
return IRQ_NONE;
}
val = rotate_read(dev, ROTATE_INT);
if (!(val & ROTATE_INT_FINISH_IRQ))
return IRQ_NONE;
/* clear flag and disable irq */
rotate_write(dev, ROTATE_INT, ROTATE_INT_FINISH_IRQ);
buffer = v4l2_m2m_dst_buf_remove(ctx->fh.m2m_ctx);
v4l2_m2m_buf_done(buffer, VB2_BUF_STATE_DONE);
buffer = v4l2_m2m_src_buf_remove(ctx->fh.m2m_ctx);
v4l2_m2m_buf_done(buffer, VB2_BUF_STATE_DONE);
v4l2_m2m_job_finish(ctx->dev->m2m_dev, ctx->fh.m2m_ctx);
return IRQ_HANDLED;
}
static inline struct rotate_ctx *rotate_file2ctx(struct file *file)
{
return container_of(file->private_data, struct rotate_ctx, fh);
}
static void rotate_prepare_format(struct v4l2_pix_format *pix_fmt)
{
unsigned int height, width, alignment, sizeimage, size, bpl;
const struct rotate_format *fmt;
int i;
fmt = rotate_find_format(pix_fmt->pixelformat);
if (!fmt)
return;
width = ALIGN(pix_fmt->width, fmt->hsub);
height = ALIGN(pix_fmt->height, fmt->vsub);
/* all pitches have to be 16 byte aligned */
alignment = 16;
if (fmt->planes > 1)
alignment *= fmt->hsub / fmt->bpp[1];
bpl = ALIGN(width * fmt->bpp[0], alignment);
sizeimage = 0;
for (i = 0; i < fmt->planes; i++) {
size = bpl * height;
if (i > 0) {
size *= fmt->bpp[i];
size /= fmt->hsub;
size /= fmt->vsub;
}
sizeimage += size;
}
pix_fmt->width = width;
pix_fmt->height = height;
pix_fmt->bytesperline = bpl;
pix_fmt->sizeimage = sizeimage;
}
static int rotate_querycap(struct file *file, void *priv,
struct v4l2_capability *cap)
{
strscpy(cap->driver, ROTATE_NAME, sizeof(cap->driver));
strscpy(cap->card, ROTATE_NAME, sizeof(cap->card));
snprintf(cap->bus_info, sizeof(cap->bus_info),
"platform:%s", ROTATE_NAME);
return 0;
}
static int rotate_enum_fmt_vid_cap(struct file *file, void *priv,
struct v4l2_fmtdesc *f)
{
return rotate_enum_fmt(f, true);
}
static int rotate_enum_fmt_vid_out(struct file *file, void *priv,
struct v4l2_fmtdesc *f)
{
return rotate_enum_fmt(f, false);
}
static int rotate_enum_framesizes(struct file *file, void *priv,
struct v4l2_frmsizeenum *fsize)
{
const struct rotate_format *fmt;
if (fsize->index != 0)
return -EINVAL;
fmt = rotate_find_format(fsize->pixel_format);
if (!fmt)
return -EINVAL;
fsize->type = V4L2_FRMSIZE_TYPE_STEPWISE;
fsize->stepwise.min_width = ROTATE_MIN_WIDTH;
fsize->stepwise.min_height = ROTATE_MIN_HEIGHT;
fsize->stepwise.max_width = ROTATE_MAX_WIDTH;
fsize->stepwise.max_height = ROTATE_MAX_HEIGHT;
fsize->stepwise.step_width = fmt->hsub;
fsize->stepwise.step_height = fmt->vsub;
return 0;
}
static int rotate_set_cap_format(struct rotate_ctx *ctx,
struct v4l2_pix_format *f,
u32 rotate)
{
const struct rotate_format *fmt;
fmt = rotate_find_format(ctx->src_fmt.pixelformat);
if (!fmt)
return -EINVAL;
if (fmt->flags & ROTATE_FLAG_YUV)
f->pixelformat = V4L2_PIX_FMT_YUV420;
else
f->pixelformat = ctx->src_fmt.pixelformat;
f->field = V4L2_FIELD_NONE;
if (rotate == 90 || rotate == 270) {
f->width = ctx->src_fmt.height;
f->height = ctx->src_fmt.width;
} else {
f->width = ctx->src_fmt.width;
f->height = ctx->src_fmt.height;
}
rotate_prepare_format(f);
return 0;
}
static int rotate_g_fmt_vid_cap(struct file *file, void *priv,
struct v4l2_format *f)
{
struct rotate_ctx *ctx = rotate_file2ctx(file);
f->fmt.pix = ctx->dst_fmt;
return 0;
}
static int rotate_g_fmt_vid_out(struct file *file, void *priv,
struct v4l2_format *f)
{
struct rotate_ctx *ctx = rotate_file2ctx(file);
f->fmt.pix = ctx->src_fmt;
return 0;
}
static int rotate_try_fmt_vid_cap(struct file *file, void *priv,
struct v4l2_format *f)
{
struct rotate_ctx *ctx = rotate_file2ctx(file);
return rotate_set_cap_format(ctx, &f->fmt.pix, ctx->rotate);
}
static int rotate_try_fmt_vid_out(struct file *file, void *priv,
struct v4l2_format *f)
{
if (!rotate_find_format(f->fmt.pix.pixelformat))
f->fmt.pix.pixelformat = V4L2_PIX_FMT_ARGB32;
if (f->fmt.pix.width < ROTATE_MIN_WIDTH)
f->fmt.pix.width = ROTATE_MIN_WIDTH;
if (f->fmt.pix.height < ROTATE_MIN_HEIGHT)
f->fmt.pix.height = ROTATE_MIN_HEIGHT;
if (f->fmt.pix.width > ROTATE_MAX_WIDTH)
f->fmt.pix.width = ROTATE_MAX_WIDTH;
if (f->fmt.pix.height > ROTATE_MAX_HEIGHT)
f->fmt.pix.height = ROTATE_MAX_HEIGHT;
f->fmt.pix.field = V4L2_FIELD_NONE;
rotate_prepare_format(&f->fmt.pix);
return 0;
}
static int rotate_s_fmt_vid_cap(struct file *file, void *priv,
struct v4l2_format *f)
{
struct rotate_ctx *ctx = rotate_file2ctx(file);
struct vb2_queue *vq;
int ret;
ret = rotate_try_fmt_vid_cap(file, priv, f);
if (ret)
return ret;
vq = v4l2_m2m_get_vq(ctx->fh.m2m_ctx, f->type);
if (vb2_is_busy(vq))
return -EBUSY;
ctx->dst_fmt = f->fmt.pix;
return 0;
}
static int rotate_s_fmt_vid_out(struct file *file, void *priv,
struct v4l2_format *f)
{
struct rotate_ctx *ctx = rotate_file2ctx(file);
struct vb2_queue *vq;
int ret;
ret = rotate_try_fmt_vid_out(file, priv, f);
if (ret)
return ret;
vq = v4l2_m2m_get_vq(ctx->fh.m2m_ctx, f->type);
if (vb2_is_busy(vq))
return -EBUSY;
/*
* Capture queue has to be also checked, because format and size
* depends on output format and size.
*/
vq = v4l2_m2m_get_vq(ctx->fh.m2m_ctx, V4L2_BUF_TYPE_VIDEO_CAPTURE);
if (vb2_is_busy(vq))
return -EBUSY;
ctx->src_fmt = f->fmt.pix;
/* Propagate colorspace information to capture. */
ctx->dst_fmt.colorspace = f->fmt.pix.colorspace;
ctx->dst_fmt.xfer_func = f->fmt.pix.xfer_func;
ctx->dst_fmt.ycbcr_enc = f->fmt.pix.ycbcr_enc;
ctx->dst_fmt.quantization = f->fmt.pix.quantization;
return rotate_set_cap_format(ctx, &ctx->dst_fmt, ctx->rotate);
}
static const struct v4l2_ioctl_ops rotate_ioctl_ops = {
.vidioc_querycap = rotate_querycap,
.vidioc_enum_framesizes = rotate_enum_framesizes,
.vidioc_enum_fmt_vid_cap = rotate_enum_fmt_vid_cap,
.vidioc_g_fmt_vid_cap = rotate_g_fmt_vid_cap,
.vidioc_try_fmt_vid_cap = rotate_try_fmt_vid_cap,
.vidioc_s_fmt_vid_cap = rotate_s_fmt_vid_cap,
.vidioc_enum_fmt_vid_out = rotate_enum_fmt_vid_out,
.vidioc_g_fmt_vid_out = rotate_g_fmt_vid_out,
.vidioc_try_fmt_vid_out = rotate_try_fmt_vid_out,
.vidioc_s_fmt_vid_out = rotate_s_fmt_vid_out,
.vidioc_reqbufs = v4l2_m2m_ioctl_reqbufs,
.vidioc_querybuf = v4l2_m2m_ioctl_querybuf,
.vidioc_qbuf = v4l2_m2m_ioctl_qbuf,
.vidioc_dqbuf = v4l2_m2m_ioctl_dqbuf,
.vidioc_prepare_buf = v4l2_m2m_ioctl_prepare_buf,
.vidioc_create_bufs = v4l2_m2m_ioctl_create_bufs,
.vidioc_expbuf = v4l2_m2m_ioctl_expbuf,
.vidioc_streamon = v4l2_m2m_ioctl_streamon,
.vidioc_streamoff = v4l2_m2m_ioctl_streamoff,
.vidioc_log_status = v4l2_ctrl_log_status,
.vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
.vidioc_unsubscribe_event = v4l2_event_unsubscribe,
};
static int rotate_queue_setup(struct vb2_queue *vq, unsigned int *nbuffers,
unsigned int *nplanes, unsigned int sizes[],
struct device *alloc_devs[])
{
struct rotate_ctx *ctx = vb2_get_drv_priv(vq);
struct v4l2_pix_format *pix_fmt;
if (V4L2_TYPE_IS_OUTPUT(vq->type))
pix_fmt = &ctx->src_fmt;
else
pix_fmt = &ctx->dst_fmt;
if (*nplanes) {
if (sizes[0] < pix_fmt->sizeimage)
return -EINVAL;
} else {
sizes[0] = pix_fmt->sizeimage;
*nplanes = 1;
}
return 0;
}
static int rotate_buf_prepare(struct vb2_buffer *vb)
{
struct vb2_queue *vq = vb->vb2_queue;
struct rotate_ctx *ctx = vb2_get_drv_priv(vq);
struct v4l2_pix_format *pix_fmt;
if (V4L2_TYPE_IS_OUTPUT(vq->type))
pix_fmt = &ctx->src_fmt;
else
pix_fmt = &ctx->dst_fmt;
if (vb2_plane_size(vb, 0) < pix_fmt->sizeimage)
return -EINVAL;
vb2_set_plane_payload(vb, 0, pix_fmt->sizeimage);
return 0;
}
static void rotate_buf_queue(struct vb2_buffer *vb)
{
struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
struct rotate_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue);
v4l2_m2m_buf_queue(ctx->fh.m2m_ctx, vbuf);
}
static void rotate_queue_cleanup(struct vb2_queue *vq, u32 state)
{
struct rotate_ctx *ctx = vb2_get_drv_priv(vq);
struct vb2_v4l2_buffer *vbuf;
do {
if (V4L2_TYPE_IS_OUTPUT(vq->type))
vbuf = v4l2_m2m_src_buf_remove(ctx->fh.m2m_ctx);
else
vbuf = v4l2_m2m_dst_buf_remove(ctx->fh.m2m_ctx);
if (vbuf)
v4l2_m2m_buf_done(vbuf, state);
} while (vbuf);
}
static int rotate_start_streaming(struct vb2_queue *vq, unsigned int count)
{
if (V4L2_TYPE_IS_OUTPUT(vq->type)) {
struct rotate_ctx *ctx = vb2_get_drv_priv(vq);
struct device *dev = ctx->dev->dev;
int ret;
ret = pm_runtime_resume_and_get(dev);
if (ret < 0) {
dev_err(dev, "Failed to enable module\n");
return ret;
}
}
return 0;
}
static void rotate_stop_streaming(struct vb2_queue *vq)
{
if (V4L2_TYPE_IS_OUTPUT(vq->type)) {
struct rotate_ctx *ctx = vb2_get_drv_priv(vq);
pm_runtime_put(ctx->dev->dev);
}
rotate_queue_cleanup(vq, VB2_BUF_STATE_ERROR);
}
static const struct vb2_ops rotate_qops = {
.queue_setup = rotate_queue_setup,
.buf_prepare = rotate_buf_prepare,
.buf_queue = rotate_buf_queue,
.start_streaming = rotate_start_streaming,
.stop_streaming = rotate_stop_streaming,
.wait_prepare = vb2_ops_wait_prepare,
.wait_finish = vb2_ops_wait_finish,
};
static int rotate_queue_init(void *priv, struct vb2_queue *src_vq,
struct vb2_queue *dst_vq)
{
struct rotate_ctx *ctx = priv;
int ret;
src_vq->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
src_vq->io_modes = VB2_MMAP | VB2_DMABUF;
src_vq->drv_priv = ctx;
src_vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer);
src_vq->min_queued_buffers = 1;
src_vq->ops = &rotate_qops;
src_vq->mem_ops = &vb2_dma_contig_memops;
src_vq->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_COPY;
src_vq->lock = &ctx->dev->dev_mutex;
src_vq->dev = ctx->dev->dev;
ret = vb2_queue_init(src_vq);
if (ret)
return ret;
dst_vq->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
dst_vq->io_modes = VB2_MMAP | VB2_DMABUF;
dst_vq->drv_priv = ctx;
dst_vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer);
dst_vq->min_queued_buffers = 2;
dst_vq->ops = &rotate_qops;
dst_vq->mem_ops = &vb2_dma_contig_memops;
dst_vq->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_COPY;
dst_vq->lock = &ctx->dev->dev_mutex;
dst_vq->dev = ctx->dev->dev;
ret = vb2_queue_init(dst_vq);
if (ret)
return ret;
return 0;
}
static int rotate_s_ctrl(struct v4l2_ctrl *ctrl)
{
struct rotate_ctx *ctx = container_of(ctrl->handler,
struct rotate_ctx,
ctrl_handler);
struct v4l2_pix_format fmt;
switch (ctrl->id) {
case V4L2_CID_HFLIP:
ctx->hflip = ctrl->val;
break;
case V4L2_CID_VFLIP:
ctx->vflip = ctrl->val;
break;
case V4L2_CID_ROTATE:
rotate_set_cap_format(ctx, &fmt, ctrl->val);
/* Check if capture format needs to be changed */
if (fmt.width != ctx->dst_fmt.width ||
fmt.height != ctx->dst_fmt.height ||
fmt.bytesperline != ctx->dst_fmt.bytesperline ||
fmt.sizeimage != ctx->dst_fmt.sizeimage) {
struct vb2_queue *vq;
vq = v4l2_m2m_get_vq(ctx->fh.m2m_ctx,
V4L2_BUF_TYPE_VIDEO_CAPTURE);
if (vb2_is_busy(vq))
return -EBUSY;
rotate_set_cap_format(ctx, &ctx->dst_fmt, ctrl->val);
}
ctx->rotate = ctrl->val;
break;
default:
return -EINVAL;
}
return 0;
}
static const struct v4l2_ctrl_ops rotate_ctrl_ops = {
.s_ctrl = rotate_s_ctrl,
};
static int rotate_setup_ctrls(struct rotate_ctx *ctx)
{
v4l2_ctrl_handler_init(&ctx->ctrl_handler, 3);
v4l2_ctrl_new_std(&ctx->ctrl_handler, &rotate_ctrl_ops,
V4L2_CID_HFLIP, 0, 1, 1, 0);
v4l2_ctrl_new_std(&ctx->ctrl_handler, &rotate_ctrl_ops,
V4L2_CID_VFLIP, 0, 1, 1, 0);
v4l2_ctrl_new_std(&ctx->ctrl_handler, &rotate_ctrl_ops,
V4L2_CID_ROTATE, 0, 270, 90, 0);
if (ctx->ctrl_handler.error) {
int err = ctx->ctrl_handler.error;
v4l2_err(&ctx->dev->v4l2_dev, "control setup failed!\n");
v4l2_ctrl_handler_free(&ctx->ctrl_handler);
return err;
}
return v4l2_ctrl_handler_setup(&ctx->ctrl_handler);
}
static int rotate_open(struct file *file)
{
struct rotate_dev *dev = video_drvdata(file);
struct rotate_ctx *ctx = NULL;
int ret;
if (mutex_lock_interruptible(&dev->dev_mutex))
return -ERESTARTSYS;
ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
if (!ctx) {
mutex_unlock(&dev->dev_mutex);
return -ENOMEM;
}
/* default output format */
ctx->src_fmt.pixelformat = V4L2_PIX_FMT_ARGB32;
ctx->src_fmt.field = V4L2_FIELD_NONE;
ctx->src_fmt.width = 640;
ctx->src_fmt.height = 480;
rotate_prepare_format(&ctx->src_fmt);
/* default capture format */
rotate_set_cap_format(ctx, &ctx->dst_fmt, ctx->rotate);
v4l2_fh_init(&ctx->fh, video_devdata(file));
file->private_data = &ctx->fh;
ctx->dev = dev;
ctx->fh.m2m_ctx = v4l2_m2m_ctx_init(dev->m2m_dev, ctx,
&rotate_queue_init);
if (IS_ERR(ctx->fh.m2m_ctx)) {
ret = PTR_ERR(ctx->fh.m2m_ctx);
goto err_free;
}
v4l2_fh_add(&ctx->fh);
ret = rotate_setup_ctrls(ctx);
if (ret)
goto err_free;
ctx->fh.ctrl_handler = &ctx->ctrl_handler;
mutex_unlock(&dev->dev_mutex);
return 0;
err_free:
kfree(ctx);
mutex_unlock(&dev->dev_mutex);
return ret;
}
static int rotate_release(struct file *file)
{
struct rotate_dev *dev = video_drvdata(file);
struct rotate_ctx *ctx = container_of(file->private_data,
struct rotate_ctx, fh);
mutex_lock(&dev->dev_mutex);
v4l2_ctrl_handler_free(&ctx->ctrl_handler);
v4l2_fh_del(&ctx->fh);
v4l2_fh_exit(&ctx->fh);
v4l2_m2m_ctx_release(ctx->fh.m2m_ctx);
kfree(ctx);
mutex_unlock(&dev->dev_mutex);
return 0;
}
static const struct v4l2_file_operations rotate_fops = {
.owner = THIS_MODULE,
.open = rotate_open,
.release = rotate_release,
.poll = v4l2_m2m_fop_poll,
.unlocked_ioctl = video_ioctl2,
.mmap = v4l2_m2m_fop_mmap,
};
static const struct video_device rotate_video_device = {
.name = ROTATE_NAME,
.vfl_dir = VFL_DIR_M2M,
.fops = &rotate_fops,
.ioctl_ops = &rotate_ioctl_ops,
.minor = -1,
.release = video_device_release_empty,
.device_caps = V4L2_CAP_VIDEO_M2M | V4L2_CAP_STREAMING,
};
static const struct v4l2_m2m_ops rotate_m2m_ops = {
.device_run = rotate_device_run,
};
static int rotate_probe(struct platform_device *pdev)
{
struct rotate_dev *dev;
struct video_device *vfd;
int irq, ret;
dev = devm_kzalloc(&pdev->dev, sizeof(*dev), GFP_KERNEL);
if (!dev)
return -ENOMEM;
dev->vfd = rotate_video_device;
dev->dev = &pdev->dev;
irq = platform_get_irq(pdev, 0);
if (irq <= 0)
return irq;
ret = devm_request_irq(dev->dev, irq, rotate_irq,
0, dev_name(dev->dev), dev);
if (ret) {
dev_err(dev->dev, "Failed to request IRQ\n");
return ret;
}
dev->base = devm_platform_ioremap_resource(pdev, 0);
if (IS_ERR(dev->base))
return PTR_ERR(dev->base);
dev->bus_clk = devm_clk_get(dev->dev, "bus");
if (IS_ERR(dev->bus_clk)) {
dev_err(dev->dev, "Failed to get bus clock\n");
return PTR_ERR(dev->bus_clk);
}
dev->mod_clk = devm_clk_get(dev->dev, "mod");
if (IS_ERR(dev->mod_clk)) {
dev_err(dev->dev, "Failed to get mod clock\n");
return PTR_ERR(dev->mod_clk);
}
dev->rstc = devm_reset_control_get(dev->dev, NULL);
if (IS_ERR(dev->rstc)) {
dev_err(dev->dev, "Failed to get reset control\n");
return PTR_ERR(dev->rstc);
}
mutex_init(&dev->dev_mutex);
ret = v4l2_device_register(&pdev->dev, &dev->v4l2_dev);
if (ret) {
dev_err(dev->dev, "Failed to register V4L2 device\n");
return ret;
}
vfd = &dev->vfd;
vfd->lock = &dev->dev_mutex;
vfd->v4l2_dev = &dev->v4l2_dev;
snprintf(vfd->name, sizeof(vfd->name), "%s",
rotate_video_device.name);
video_set_drvdata(vfd, dev);
ret = video_register_device(vfd, VFL_TYPE_VIDEO, 0);
if (ret) {
v4l2_err(&dev->v4l2_dev, "Failed to register video device\n");
goto err_v4l2;
}
v4l2_info(&dev->v4l2_dev,
"Device registered as /dev/video%d\n", vfd->num);
dev->m2m_dev = v4l2_m2m_init(&rotate_m2m_ops);
if (IS_ERR(dev->m2m_dev)) {
v4l2_err(&dev->v4l2_dev,
"Failed to initialize V4L2 M2M device\n");
ret = PTR_ERR(dev->m2m_dev);
goto err_video;
}
platform_set_drvdata(pdev, dev);
pm_runtime_enable(dev->dev);
return 0;
err_video:
video_unregister_device(&dev->vfd);
err_v4l2:
v4l2_device_unregister(&dev->v4l2_dev);
return ret;
}
static void rotate_remove(struct platform_device *pdev)
{
struct rotate_dev *dev = platform_get_drvdata(pdev);
v4l2_m2m_release(dev->m2m_dev);
video_unregister_device(&dev->vfd);
v4l2_device_unregister(&dev->v4l2_dev);
pm_runtime_force_suspend(&pdev->dev);
}
static int rotate_runtime_resume(struct device *device)
{
struct rotate_dev *dev = dev_get_drvdata(device);
int ret;
ret = clk_prepare_enable(dev->bus_clk);
if (ret) {
dev_err(dev->dev, "Failed to enable bus clock\n");
return ret;
}
ret = clk_prepare_enable(dev->mod_clk);
if (ret) {
dev_err(dev->dev, "Failed to enable mod clock\n");
goto err_bus_clk;
}
ret = reset_control_deassert(dev->rstc);
if (ret) {
dev_err(dev->dev, "Failed to apply reset\n");
goto err_mod_clk;
}
return 0;
err_mod_clk:
clk_disable_unprepare(dev->mod_clk);
err_bus_clk:
clk_disable_unprepare(dev->bus_clk);
return ret;
}
static int rotate_runtime_suspend(struct device *device)
{
struct rotate_dev *dev = dev_get_drvdata(device);
reset_control_assert(dev->rstc);
clk_disable_unprepare(dev->mod_clk);
clk_disable_unprepare(dev->bus_clk);
return 0;
}
static const struct of_device_id rotate_dt_match[] = {
{ .compatible = "allwinner,sun8i-a83t-de2-rotate" },
{ /* sentinel */ }
};
MODULE_DEVICE_TABLE(of, rotate_dt_match);
static const struct dev_pm_ops rotate_pm_ops = {
.runtime_resume = rotate_runtime_resume,
.runtime_suspend = rotate_runtime_suspend,
};
static struct platform_driver rotate_driver = {
.probe = rotate_probe,
.remove_new = rotate_remove,
.driver = {
.name = ROTATE_NAME,
.of_match_table = rotate_dt_match,
.pm = &rotate_pm_ops,
},
};
module_platform_driver(rotate_driver);
MODULE_LICENSE("GPL v2");
MODULE_AUTHOR("Jernej Skrabec <[email protected]>");
MODULE_DESCRIPTION("Allwinner DE2 rotate driver");
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