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linux/drivers/media/platform/fsl-viu.c
Linus Torvalds a9a08845e9 vfs: do bulk POLL* -> EPOLL* replacement 
This is the mindless scripted replacement of kernel use of POLL*
variables as described by Al, done by this script:

    for V in IN OUT PRI ERR RDNORM RDBAND WRNORM WRBAND HUP RDHUP NVAL MSG; do
        L=`git grep -l -w POLL$V | grep -v '^t' | grep -v /um/ | grep -v '^sa' | grep -v '/poll.h$'|grep -v '^D'`
        for f in $L; do sed -i "-es/^\([^\"]*\)\(\<POLL$V\>\)/\\1E\\2/" $f; done
    done

with de-mangling cleanups yet to come.

NOTE! On almost all architectures, the EPOLL* constants have the same
values as the POLL* constants do.  But they keyword here is "almost".
For various bad reasons they aren't the same, and epoll() doesn't
actually work quite correctly in some cases due to this on Sparc et al.

The next patch from Al will sort out the final differences, and we
should be all done.

Scripted-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2018-02-11 14:34:03 -08:00

1614 lines
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/*
* Copyright 2008-2010 Freescale Semiconductor, Inc. All Rights Reserved.
*
* Freescale VIU video driver
*
* Authors: Hongjun Chen <hong-jun.chen@freescale.com>
* Porting to 2.6.35 by DENX Software Engineering,
* Anatolij Gustschin <agust@denx.de>
*
* 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/clk.h>
#include <linux/kernel.h>
#include <linux/i2c.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/io.h>
#include <linux/of_address.h>
#include <linux/of_irq.h>
#include <linux/of_platform.h>
#include <linux/slab.h>
#include <media/v4l2-common.h>
#include <media/v4l2-device.h>
#include <media/v4l2-ioctl.h>
#include <media/v4l2-ctrls.h>
#include <media/v4l2-fh.h>
#include <media/v4l2-event.h>
#include <media/videobuf-dma-contig.h>
#define DRV_NAME "fsl_viu"
#define VIU_VERSION "0.5.1"
#define BUFFER_TIMEOUT msecs_to_jiffies(500) /* 0.5 seconds */
#define VIU_VID_MEM_LIMIT 4 /* Video memory limit, in Mb */
/* I2C address of video decoder chip is 0x4A */
#define VIU_VIDEO_DECODER_ADDR 0x25
static int info_level;
#define dprintk(level, fmt, arg...) \
do { \
if (level <= info_level) \
printk(KERN_DEBUG "viu: " fmt , ## arg); \
} while (0)
/*
* Basic structures
*/
struct viu_fmt {
u32 fourcc; /* v4l2 format id */
u32 pixelformat;
int depth;
};
static struct viu_fmt formats[] = {
{
.fourcc = V4L2_PIX_FMT_RGB565,
.pixelformat = V4L2_PIX_FMT_RGB565,
.depth = 16,
}, {
.fourcc = V4L2_PIX_FMT_RGB32,
.pixelformat = V4L2_PIX_FMT_RGB32,
.depth = 32,
}
};
struct viu_dev;
struct viu_buf;
/* buffer for one video frame */
struct viu_buf {
/* common v4l buffer stuff -- must be first */
struct videobuf_buffer vb;
struct viu_fmt *fmt;
};
struct viu_dmaqueue {
struct viu_dev *dev;
struct list_head active;
struct list_head queued;
struct timer_list timeout;
};
struct viu_status {
u32 field_irq;
u32 vsync_irq;
u32 hsync_irq;
u32 vstart_irq;
u32 dma_end_irq;
u32 error_irq;
};
struct viu_reg {
u32 status_cfg;
u32 luminance;
u32 chroma_r;
u32 chroma_g;
u32 chroma_b;
u32 field_base_addr;
u32 dma_inc;
u32 picture_count;
u32 req_alarm;
u32 alpha;
} __attribute__ ((packed));
struct viu_dev {
struct v4l2_device v4l2_dev;
struct v4l2_ctrl_handler hdl;
struct mutex lock;
spinlock_t slock;
int users;
struct device *dev;
/* various device info */
struct video_device *vdev;
struct viu_dmaqueue vidq;
enum v4l2_field capfield;
int field;
int first;
int dma_done;
/* Hardware register area */
struct viu_reg *vr;
/* Interrupt vector */
int irq;
struct viu_status irqs;
/* video overlay */
struct v4l2_framebuffer ovbuf;
struct viu_fmt *ovfmt;
unsigned int ovenable;
enum v4l2_field ovfield;
/* crop */
struct v4l2_rect crop_current;
/* clock pointer */
struct clk *clk;
/* decoder */
struct v4l2_subdev *decoder;
v4l2_std_id std;
};
struct viu_fh {
/* must remain the first field of this struct */
struct v4l2_fh fh;
struct viu_dev *dev;
/* video capture */
struct videobuf_queue vb_vidq;
spinlock_t vbq_lock; /* spinlock for the videobuf queue */
/* video overlay */
struct v4l2_window win;
struct v4l2_clip clips[1];
/* video capture */
struct viu_fmt *fmt;
int width, height, sizeimage;
enum v4l2_buf_type type;
};
static struct viu_reg reg_val;
/*
* Macro definitions of VIU registers
*/
/* STATUS_CONFIG register */
enum status_config {
SOFT_RST = 1 << 0,
ERR_MASK = 0x0f << 4, /* Error code mask */
ERR_NO = 0x00, /* No error */
ERR_DMA_V = 0x01 << 4, /* DMA in vertical active */
ERR_DMA_VB = 0x02 << 4, /* DMA in vertical blanking */
ERR_LINE_TOO_LONG = 0x04 << 4, /* Line too long */
ERR_TOO_MANG_LINES = 0x05 << 4, /* Too many lines in field */
ERR_LINE_TOO_SHORT = 0x06 << 4, /* Line too short */
ERR_NOT_ENOUGH_LINE = 0x07 << 4, /* Not enough lines in field */
ERR_FIFO_OVERFLOW = 0x08 << 4, /* FIFO overflow */
ERR_FIFO_UNDERFLOW = 0x09 << 4, /* FIFO underflow */
ERR_1bit_ECC = 0x0a << 4, /* One bit ECC error */
ERR_MORE_ECC = 0x0b << 4, /* Two/more bits ECC error */
INT_FIELD_EN = 0x01 << 8, /* Enable field interrupt */
INT_VSYNC_EN = 0x01 << 9, /* Enable vsync interrupt */
INT_HSYNC_EN = 0x01 << 10, /* Enable hsync interrupt */
INT_VSTART_EN = 0x01 << 11, /* Enable vstart interrupt */
INT_DMA_END_EN = 0x01 << 12, /* Enable DMA end interrupt */
INT_ERROR_EN = 0x01 << 13, /* Enable error interrupt */
INT_ECC_EN = 0x01 << 14, /* Enable ECC interrupt */
INT_FIELD_STATUS = 0x01 << 16, /* field interrupt status */
INT_VSYNC_STATUS = 0x01 << 17, /* vsync interrupt status */
INT_HSYNC_STATUS = 0x01 << 18, /* hsync interrupt status */
INT_VSTART_STATUS = 0x01 << 19, /* vstart interrupt status */
INT_DMA_END_STATUS = 0x01 << 20, /* DMA end interrupt status */
INT_ERROR_STATUS = 0x01 << 21, /* error interrupt status */
DMA_ACT = 0x01 << 27, /* Enable DMA transfer */
FIELD_NO = 0x01 << 28, /* Field number */
DITHER_ON = 0x01 << 29, /* Dithering is on */
ROUND_ON = 0x01 << 30, /* Round is on */
MODE_32BIT = 0x01 << 31, /* Data in RGBa888,
* 0 in RGB565
*/
};
#define norm_maxw() 720
#define norm_maxh() 576
#define INT_ALL_STATUS (INT_FIELD_STATUS | INT_VSYNC_STATUS | \
INT_HSYNC_STATUS | INT_VSTART_STATUS | \
INT_DMA_END_STATUS | INT_ERROR_STATUS)
#define NUM_FORMATS ARRAY_SIZE(formats)
static irqreturn_t viu_intr(int irq, void *dev_id);
struct viu_fmt *format_by_fourcc(int fourcc)
{
int i;
for (i = 0; i < NUM_FORMATS; i++) {
if (formats[i].pixelformat == fourcc)
return formats + i;
}
dprintk(0, "unknown pixelformat:'%4.4s'\n", (char *)&fourcc);
return NULL;
}
void viu_start_dma(struct viu_dev *dev)
{
struct viu_reg *vr = dev->vr;
dev->field = 0;
/* Enable DMA operation */
out_be32(&vr->status_cfg, SOFT_RST);
out_be32(&vr->status_cfg, INT_FIELD_EN);
}
void viu_stop_dma(struct viu_dev *dev)
{
struct viu_reg *vr = dev->vr;
int cnt = 100;
u32 status_cfg;
out_be32(&vr->status_cfg, 0);
/* Clear pending interrupts */
status_cfg = in_be32(&vr->status_cfg);
if (status_cfg & 0x3f0000)
out_be32(&vr->status_cfg, status_cfg & 0x3f0000);
if (status_cfg & DMA_ACT) {
do {
status_cfg = in_be32(&vr->status_cfg);
if (status_cfg & INT_DMA_END_STATUS)
break;
} while (cnt--);
if (cnt < 0) {
/* timed out, issue soft reset */
out_be32(&vr->status_cfg, SOFT_RST);
out_be32(&vr->status_cfg, 0);
} else {
/* clear DMA_END and other pending irqs */
out_be32(&vr->status_cfg, status_cfg & 0x3f0000);
}
}
dev->field = 0;
}
static int restart_video_queue(struct viu_dmaqueue *vidq)
{
struct viu_buf *buf, *prev;
dprintk(1, "%s vidq=0x%08lx\n", __func__, (unsigned long)vidq);
if (!list_empty(&vidq->active)) {
buf = list_entry(vidq->active.next, struct viu_buf, vb.queue);
dprintk(2, "restart_queue [%p/%d]: restart dma\n",
buf, buf->vb.i);
viu_stop_dma(vidq->dev);
/* cancel all outstanding capture requests */
list_for_each_entry_safe(buf, prev, &vidq->active, vb.queue) {
list_del(&buf->vb.queue);
buf->vb.state = VIDEOBUF_ERROR;
wake_up(&buf->vb.done);
}
mod_timer(&vidq->timeout, jiffies+BUFFER_TIMEOUT);
return 0;
}
prev = NULL;
for (;;) {
if (list_empty(&vidq->queued))
return 0;
buf = list_entry(vidq->queued.next, struct viu_buf, vb.queue);
if (prev == NULL) {
list_move_tail(&buf->vb.queue, &vidq->active);
dprintk(1, "Restarting video dma\n");
viu_stop_dma(vidq->dev);
viu_start_dma(vidq->dev);
buf->vb.state = VIDEOBUF_ACTIVE;
mod_timer(&vidq->timeout, jiffies+BUFFER_TIMEOUT);
dprintk(2, "[%p/%d] restart_queue - first active\n",
buf, buf->vb.i);
} else if (prev->vb.width == buf->vb.width &&
prev->vb.height == buf->vb.height &&
prev->fmt == buf->fmt) {
list_move_tail(&buf->vb.queue, &vidq->active);
buf->vb.state = VIDEOBUF_ACTIVE;
dprintk(2, "[%p/%d] restart_queue - move to active\n",
buf, buf->vb.i);
} else {
return 0;
}
prev = buf;
}
}
static void viu_vid_timeout(struct timer_list *t)
{
struct viu_dev *dev = from_timer(dev, t, vidq.timeout);
struct viu_buf *buf;
struct viu_dmaqueue *vidq = &dev->vidq;
while (!list_empty(&vidq->active)) {
buf = list_entry(vidq->active.next, struct viu_buf, vb.queue);
list_del(&buf->vb.queue);
buf->vb.state = VIDEOBUF_ERROR;
wake_up(&buf->vb.done);
dprintk(1, "viu/0: [%p/%d] timeout\n", buf, buf->vb.i);
}
restart_video_queue(vidq);
}
/*
* Videobuf operations
*/
static int buffer_setup(struct videobuf_queue *vq, unsigned int *count,
unsigned int *size)
{
struct viu_fh *fh = vq->priv_data;
*size = fh->width * fh->height * fh->fmt->depth >> 3;
if (*count == 0)
*count = 32;
while (*size * *count > VIU_VID_MEM_LIMIT * 1024 * 1024)
(*count)--;
dprintk(1, "%s, count=%d, size=%d\n", __func__, *count, *size);
return 0;
}
static void free_buffer(struct videobuf_queue *vq, struct viu_buf *buf)
{
struct videobuf_buffer *vb = &buf->vb;
void *vaddr = NULL;
BUG_ON(in_interrupt());
videobuf_waiton(vq, &buf->vb, 0, 0);
if (vq->int_ops && vq->int_ops->vaddr)
vaddr = vq->int_ops->vaddr(vb);
if (vaddr)
videobuf_dma_contig_free(vq, &buf->vb);
buf->vb.state = VIDEOBUF_NEEDS_INIT;
}
inline int buffer_activate(struct viu_dev *dev, struct viu_buf *buf)
{
struct viu_reg *vr = dev->vr;
int bpp;
/* setup the DMA base address */
reg_val.field_base_addr = videobuf_to_dma_contig(&buf->vb);
dprintk(1, "buffer_activate [%p/%d]: dma addr 0x%lx\n",
buf, buf->vb.i, (unsigned long)reg_val.field_base_addr);
/* interlace is on by default, set horizontal DMA increment */
reg_val.status_cfg = 0;
bpp = buf->fmt->depth >> 3;
switch (bpp) {
case 2:
reg_val.status_cfg &= ~MODE_32BIT;
reg_val.dma_inc = buf->vb.width * 2;
break;
case 4:
reg_val.status_cfg |= MODE_32BIT;
reg_val.dma_inc = buf->vb.width * 4;
break;
default:
dprintk(0, "doesn't support color depth(%d)\n",
bpp * 8);
return -EINVAL;
}
/* setup picture_count register */
reg_val.picture_count = (buf->vb.height / 2) << 16 |
buf->vb.width;
reg_val.status_cfg |= DMA_ACT | INT_DMA_END_EN | INT_FIELD_EN;
buf->vb.state = VIDEOBUF_ACTIVE;
dev->capfield = buf->vb.field;
/* reset dma increment if needed */
if (!V4L2_FIELD_HAS_BOTH(buf->vb.field))
reg_val.dma_inc = 0;
out_be32(&vr->dma_inc, reg_val.dma_inc);
out_be32(&vr->picture_count, reg_val.picture_count);
out_be32(&vr->field_base_addr, reg_val.field_base_addr);
mod_timer(&dev->vidq.timeout, jiffies + BUFFER_TIMEOUT);
return 0;
}
static int buffer_prepare(struct videobuf_queue *vq,
struct videobuf_buffer *vb,
enum v4l2_field field)
{
struct viu_fh *fh = vq->priv_data;
struct viu_buf *buf = container_of(vb, struct viu_buf, vb);
int rc;
BUG_ON(fh->fmt == NULL);
if (fh->width < 48 || fh->width > norm_maxw() ||
fh->height < 32 || fh->height > norm_maxh())
return -EINVAL;
buf->vb.size = (fh->width * fh->height * fh->fmt->depth) >> 3;
if (buf->vb.baddr != 0 && buf->vb.bsize < buf->vb.size)
return -EINVAL;
if (buf->fmt != fh->fmt ||
buf->vb.width != fh->width ||
buf->vb.height != fh->height ||
buf->vb.field != field) {
buf->fmt = fh->fmt;
buf->vb.width = fh->width;
buf->vb.height = fh->height;
buf->vb.field = field;
}
if (buf->vb.state == VIDEOBUF_NEEDS_INIT) {
rc = videobuf_iolock(vq, &buf->vb, NULL);
if (rc != 0)
goto fail;
buf->vb.width = fh->width;
buf->vb.height = fh->height;
buf->vb.field = field;
buf->fmt = fh->fmt;
}
buf->vb.state = VIDEOBUF_PREPARED;
return 0;
fail:
free_buffer(vq, buf);
return rc;
}
static void buffer_queue(struct videobuf_queue *vq, struct videobuf_buffer *vb)
{
struct viu_buf *buf = container_of(vb, struct viu_buf, vb);
struct viu_fh *fh = vq->priv_data;
struct viu_dev *dev = fh->dev;
struct viu_dmaqueue *vidq = &dev->vidq;
struct viu_buf *prev;
if (!list_empty(&vidq->queued)) {
dprintk(1, "adding vb queue=0x%08lx\n",
(unsigned long)&buf->vb.queue);
dprintk(1, "vidq pointer 0x%p, queued 0x%p\n",
vidq, &vidq->queued);
dprintk(1, "dev %p, queued: self %p, next %p, head %p\n",
dev, &vidq->queued, vidq->queued.next,
vidq->queued.prev);
list_add_tail(&buf->vb.queue, &vidq->queued);
buf->vb.state = VIDEOBUF_QUEUED;
dprintk(2, "[%p/%d] buffer_queue - append to queued\n",
buf, buf->vb.i);
} else if (list_empty(&vidq->active)) {
dprintk(1, "adding vb active=0x%08lx\n",
(unsigned long)&buf->vb.queue);
list_add_tail(&buf->vb.queue, &vidq->active);
buf->vb.state = VIDEOBUF_ACTIVE;
mod_timer(&vidq->timeout, jiffies+BUFFER_TIMEOUT);
dprintk(2, "[%p/%d] buffer_queue - first active\n",
buf, buf->vb.i);
buffer_activate(dev, buf);
} else {
dprintk(1, "adding vb queue2=0x%08lx\n",
(unsigned long)&buf->vb.queue);
prev = list_entry(vidq->active.prev, struct viu_buf, vb.queue);
if (prev->vb.width == buf->vb.width &&
prev->vb.height == buf->vb.height &&
prev->fmt == buf->fmt) {
list_add_tail(&buf->vb.queue, &vidq->active);
buf->vb.state = VIDEOBUF_ACTIVE;
dprintk(2, "[%p/%d] buffer_queue - append to active\n",
buf, buf->vb.i);
} else {
list_add_tail(&buf->vb.queue, &vidq->queued);
buf->vb.state = VIDEOBUF_QUEUED;
dprintk(2, "[%p/%d] buffer_queue - first queued\n",
buf, buf->vb.i);
}
}
}
static void buffer_release(struct videobuf_queue *vq,
struct videobuf_buffer *vb)
{
struct viu_buf *buf = container_of(vb, struct viu_buf, vb);
struct viu_fh *fh = vq->priv_data;
struct viu_dev *dev = (struct viu_dev *)fh->dev;
viu_stop_dma(dev);
free_buffer(vq, buf);
}
static const struct videobuf_queue_ops viu_video_qops = {
.buf_setup = buffer_setup,
.buf_prepare = buffer_prepare,
.buf_queue = buffer_queue,
.buf_release = buffer_release,
};
/*
* IOCTL vidioc handling
*/
static int vidioc_querycap(struct file *file, void *priv,
struct v4l2_capability *cap)
{
strcpy(cap->driver, "viu");
strcpy(cap->card, "viu");
strcpy(cap->bus_info, "platform:viu");
cap->device_caps = V4L2_CAP_VIDEO_CAPTURE |
V4L2_CAP_STREAMING |
V4L2_CAP_VIDEO_OVERLAY |
V4L2_CAP_READWRITE;
cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
return 0;
}
static int vidioc_enum_fmt(struct file *file, void *priv,
struct v4l2_fmtdesc *f)
{
int index = f->index;
if (f->index >= NUM_FORMATS)
return -EINVAL;
f->pixelformat = formats[index].fourcc;
return 0;
}
static int vidioc_g_fmt_cap(struct file *file, void *priv,
struct v4l2_format *f)
{
struct viu_fh *fh = priv;
f->fmt.pix.width = fh->width;
f->fmt.pix.height = fh->height;
f->fmt.pix.field = fh->vb_vidq.field;
f->fmt.pix.pixelformat = fh->fmt->pixelformat;
f->fmt.pix.bytesperline =
(f->fmt.pix.width * fh->fmt->depth) >> 3;
f->fmt.pix.sizeimage = fh->sizeimage;
f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
return 0;
}
static int vidioc_try_fmt_cap(struct file *file, void *priv,
struct v4l2_format *f)
{
struct viu_fmt *fmt;
unsigned int maxw, maxh;
fmt = format_by_fourcc(f->fmt.pix.pixelformat);
if (!fmt) {
dprintk(1, "Fourcc format (0x%08x) invalid.",
f->fmt.pix.pixelformat);
return -EINVAL;
}
maxw = norm_maxw();
maxh = norm_maxh();
f->fmt.pix.field = V4L2_FIELD_INTERLACED;
if (f->fmt.pix.height < 32)
f->fmt.pix.height = 32;
if (f->fmt.pix.height > maxh)
f->fmt.pix.height = maxh;
if (f->fmt.pix.width < 48)
f->fmt.pix.width = 48;
if (f->fmt.pix.width > maxw)
f->fmt.pix.width = maxw;
f->fmt.pix.width &= ~0x03;
f->fmt.pix.bytesperline =
(f->fmt.pix.width * fmt->depth) >> 3;
f->fmt.pix.sizeimage = f->fmt.pix.height * f->fmt.pix.bytesperline;
f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
return 0;
}
static int vidioc_s_fmt_cap(struct file *file, void *priv,
struct v4l2_format *f)
{
struct viu_fh *fh = priv;
int ret;
ret = vidioc_try_fmt_cap(file, fh, f);
if (ret < 0)
return ret;
fh->fmt = format_by_fourcc(f->fmt.pix.pixelformat);
fh->width = f->fmt.pix.width;
fh->height = f->fmt.pix.height;
fh->sizeimage = f->fmt.pix.sizeimage;
fh->vb_vidq.field = f->fmt.pix.field;
fh->type = f->type;
return 0;
}
static int vidioc_g_fmt_overlay(struct file *file, void *priv,
struct v4l2_format *f)
{
struct viu_fh *fh = priv;
f->fmt.win = fh->win;
return 0;
}
static int verify_preview(struct viu_dev *dev, struct v4l2_window *win)
{
enum v4l2_field field;
int maxw, maxh;
if (dev->ovbuf.base == NULL)
return -EINVAL;
if (dev->ovfmt == NULL)
return -EINVAL;
if (win->w.width < 48 || win->w.height < 32)
return -EINVAL;
field = win->field;
maxw = dev->crop_current.width;
maxh = dev->crop_current.height;
if (field == V4L2_FIELD_ANY) {
field = (win->w.height > maxh/2)
? V4L2_FIELD_INTERLACED
: V4L2_FIELD_TOP;
}
switch (field) {
case V4L2_FIELD_TOP:
case V4L2_FIELD_BOTTOM:
maxh = maxh / 2;
break;
case V4L2_FIELD_INTERLACED:
break;
default:
return -EINVAL;
}
win->field = field;
if (win->w.width > maxw)
win->w.width = maxw;
if (win->w.height > maxh)
win->w.height = maxh;
return 0;
}
inline void viu_activate_overlay(struct viu_reg *viu_reg)
{
struct viu_reg *vr = viu_reg;
out_be32(&vr->field_base_addr, reg_val.field_base_addr);
out_be32(&vr->dma_inc, reg_val.dma_inc);
out_be32(&vr->picture_count, reg_val.picture_count);
}
static int viu_setup_preview(struct viu_dev *dev, struct viu_fh *fh)
{
int bpp;
dprintk(1, "%s %dx%d\n", __func__,
fh->win.w.width, fh->win.w.height);
reg_val.status_cfg = 0;
/* setup window */
reg_val.picture_count = (fh->win.w.height / 2) << 16 |
fh->win.w.width;
/* setup color depth and dma increment */
bpp = dev->ovfmt->depth / 8;
switch (bpp) {
case 2:
reg_val.status_cfg &= ~MODE_32BIT;
reg_val.dma_inc = fh->win.w.width * 2;
break;
case 4:
reg_val.status_cfg |= MODE_32BIT;
reg_val.dma_inc = fh->win.w.width * 4;
break;
default:
dprintk(0, "device doesn't support color depth(%d)\n",
bpp * 8);
return -EINVAL;
}
dev->ovfield = fh->win.field;
if (!V4L2_FIELD_HAS_BOTH(dev->ovfield))
reg_val.dma_inc = 0;
reg_val.status_cfg |= DMA_ACT | INT_DMA_END_EN | INT_FIELD_EN;
/* setup the base address of the overlay buffer */
reg_val.field_base_addr = (u32)dev->ovbuf.base;
return 0;
}
static int vidioc_s_fmt_overlay(struct file *file, void *priv,
struct v4l2_format *f)
{
struct viu_fh *fh = priv;
struct viu_dev *dev = (struct viu_dev *)fh->dev;
unsigned long flags;
int err;
err = verify_preview(dev, &f->fmt.win);
if (err)
return err;
fh->win = f->fmt.win;
spin_lock_irqsave(&dev->slock, flags);
viu_setup_preview(dev, fh);
spin_unlock_irqrestore(&dev->slock, flags);
return 0;
}
static int vidioc_try_fmt_overlay(struct file *file, void *priv,
struct v4l2_format *f)
{
return 0;
}
static int vidioc_overlay(struct file *file, void *priv, unsigned int on)
{
struct viu_fh *fh = priv;
struct viu_dev *dev = (struct viu_dev *)fh->dev;
unsigned long flags;
if (on) {
spin_lock_irqsave(&dev->slock, flags);
viu_activate_overlay(dev->vr);
dev->ovenable = 1;
/* start dma */
viu_start_dma(dev);
spin_unlock_irqrestore(&dev->slock, flags);
} else {
viu_stop_dma(dev);
dev->ovenable = 0;
}
return 0;
}
int vidioc_g_fbuf(struct file *file, void *priv, struct v4l2_framebuffer *arg)
{
struct viu_fh *fh = priv;
struct viu_dev *dev = fh->dev;
struct v4l2_framebuffer *fb = arg;
*fb = dev->ovbuf;
fb->capability = V4L2_FBUF_CAP_LIST_CLIPPING;
return 0;
}
int vidioc_s_fbuf(struct file *file, void *priv, const struct v4l2_framebuffer *arg)
{
struct viu_fh *fh = priv;
struct viu_dev *dev = fh->dev;
const struct v4l2_framebuffer *fb = arg;
struct viu_fmt *fmt;
if (!capable(CAP_SYS_ADMIN) && !capable(CAP_SYS_RAWIO))
return -EPERM;
/* check args */
fmt = format_by_fourcc(fb->fmt.pixelformat);
if (fmt == NULL)
return -EINVAL;
/* ok, accept it */
dev->ovbuf = *fb;
dev->ovfmt = fmt;
if (dev->ovbuf.fmt.bytesperline == 0) {
dev->ovbuf.fmt.bytesperline =
dev->ovbuf.fmt.width * fmt->depth / 8;
}
return 0;
}
static int vidioc_reqbufs(struct file *file, void *priv,
struct v4l2_requestbuffers *p)
{
struct viu_fh *fh = priv;
return videobuf_reqbufs(&fh->vb_vidq, p);
}
static int vidioc_querybuf(struct file *file, void *priv,
struct v4l2_buffer *p)
{
struct viu_fh *fh = priv;
return videobuf_querybuf(&fh->vb_vidq, p);
}
static int vidioc_qbuf(struct file *file, void *priv, struct v4l2_buffer *p)
{
struct viu_fh *fh = priv;
return videobuf_qbuf(&fh->vb_vidq, p);
}
static int vidioc_dqbuf(struct file *file, void *priv, struct v4l2_buffer *p)
{
struct viu_fh *fh = priv;
return videobuf_dqbuf(&fh->vb_vidq, p,
file->f_flags & O_NONBLOCK);
}
static int vidioc_streamon(struct file *file, void *priv, enum v4l2_buf_type i)
{
struct viu_fh *fh = priv;
struct viu_dev *dev = fh->dev;
if (fh->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
return -EINVAL;
if (fh->type != i)
return -EINVAL;
if (dev->ovenable)
dev->ovenable = 0;
viu_start_dma(fh->dev);
return videobuf_streamon(&fh->vb_vidq);
}
static int vidioc_streamoff(struct file *file, void *priv, enum v4l2_buf_type i)
{
struct viu_fh *fh = priv;
if (fh->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
return -EINVAL;
if (fh->type != i)
return -EINVAL;
viu_stop_dma(fh->dev);
return videobuf_streamoff(&fh->vb_vidq);
}
#define decoder_call(viu, o, f, args...) \
v4l2_subdev_call(viu->decoder, o, f, ##args)
static int vidioc_querystd(struct file *file, void *priv, v4l2_std_id *std_id)
{
struct viu_fh *fh = priv;
decoder_call(fh->dev, video, querystd, std_id);
return 0;
}
static int vidioc_s_std(struct file *file, void *priv, v4l2_std_id id)
{
struct viu_fh *fh = priv;
fh->dev->std = id;
decoder_call(fh->dev, video, s_std, id);
return 0;
}
static int vidioc_g_std(struct file *file, void *priv, v4l2_std_id *std_id)
{
struct viu_fh *fh = priv;
*std_id = fh->dev->std;
return 0;
}
/* only one input in this driver */
static int vidioc_enum_input(struct file *file, void *priv,
struct v4l2_input *inp)
{
struct viu_fh *fh = priv;
if (inp->index != 0)
return -EINVAL;
inp->type = V4L2_INPUT_TYPE_CAMERA;
inp->std = fh->dev->vdev->tvnorms;
strcpy(inp->name, "Camera");
return 0;
}
static int vidioc_g_input(struct file *file, void *priv, unsigned int *i)
{
*i = 0;
return 0;
}
static int vidioc_s_input(struct file *file, void *priv, unsigned int i)
{
struct viu_fh *fh = priv;
if (i)
return -EINVAL;
decoder_call(fh->dev, video, s_routing, i, 0, 0);
return 0;
}
inline void viu_activate_next_buf(struct viu_dev *dev,
struct viu_dmaqueue *viuq)
{
struct viu_dmaqueue *vidq = viuq;
struct viu_buf *buf;
/* launch another DMA operation for an active/queued buffer */
if (!list_empty(&vidq->active)) {
buf = list_entry(vidq->active.next, struct viu_buf,
vb.queue);
dprintk(1, "start another queued buffer: 0x%p\n", buf);
buffer_activate(dev, buf);
} else if (!list_empty(&vidq->queued)) {
buf = list_entry(vidq->queued.next, struct viu_buf,
vb.queue);
list_del(&buf->vb.queue);
dprintk(1, "start another queued buffer: 0x%p\n", buf);
list_add_tail(&buf->vb.queue, &vidq->active);
buf->vb.state = VIDEOBUF_ACTIVE;
buffer_activate(dev, buf);
}
}
inline void viu_default_settings(struct viu_reg *viu_reg)
{
struct viu_reg *vr = viu_reg;
out_be32(&vr->luminance, 0x9512A254);
out_be32(&vr->chroma_r, 0x03310000);
out_be32(&vr->chroma_g, 0x06600F38);
out_be32(&vr->chroma_b, 0x00000409);
out_be32(&vr->alpha, 0x000000ff);
out_be32(&vr->req_alarm, 0x00000090);
dprintk(1, "status reg: 0x%08x, field base: 0x%08x\n",
in_be32(&vr->status_cfg), in_be32(&vr->field_base_addr));
}
static void viu_overlay_intr(struct viu_dev *dev, u32 status)
{
struct viu_reg *vr = dev->vr;
if (status & INT_DMA_END_STATUS)
dev->dma_done = 1;
if (status & INT_FIELD_STATUS) {
if (dev->dma_done) {
u32 addr = reg_val.field_base_addr;
dev->dma_done = 0;
if (status & FIELD_NO)
addr += reg_val.dma_inc;
out_be32(&vr->field_base_addr, addr);
out_be32(&vr->dma_inc, reg_val.dma_inc);
out_be32(&vr->status_cfg,
(status & 0xffc0ffff) |
(status & INT_ALL_STATUS) |
reg_val.status_cfg);
} else if (status & INT_VSYNC_STATUS) {
out_be32(&vr->status_cfg,
(status & 0xffc0ffff) |
(status & INT_ALL_STATUS) |
reg_val.status_cfg);
}
}
}
static void viu_capture_intr(struct viu_dev *dev, u32 status)
{
struct viu_dmaqueue *vidq = &dev->vidq;
struct viu_reg *vr = dev->vr;
struct viu_buf *buf;
int field_num;
int need_two;
int dma_done = 0;
field_num = status & FIELD_NO;
need_two = V4L2_FIELD_HAS_BOTH(dev->capfield);
if (status & INT_DMA_END_STATUS) {
dma_done = 1;
if (((field_num == 0) && (dev->field == 0)) ||
(field_num && (dev->field == 1)))
dev->field++;
}
if (status & INT_FIELD_STATUS) {
dprintk(1, "irq: field %d, done %d\n",
!!field_num, dma_done);
if (unlikely(dev->first)) {
if (field_num == 0) {
dev->first = 0;
dprintk(1, "activate first buf\n");
viu_activate_next_buf(dev, vidq);
} else
dprintk(1, "wait field 0\n");
return;
}
/* setup buffer address for next dma operation */
if (!list_empty(&vidq->active)) {
u32 addr = reg_val.field_base_addr;
if (field_num && need_two) {
addr += reg_val.dma_inc;
dprintk(1, "field 1, 0x%lx, dev field %d\n",
(unsigned long)addr, dev->field);
}
out_be32(&vr->field_base_addr, addr);
out_be32(&vr->dma_inc, reg_val.dma_inc);
out_be32(&vr->status_cfg,
(status & 0xffc0ffff) |
(status & INT_ALL_STATUS) |
reg_val.status_cfg);
return;
}
}
if (dma_done && field_num && (dev->field == 2)) {
dev->field = 0;
buf = list_entry(vidq->active.next,
struct viu_buf, vb.queue);
dprintk(1, "viu/0: [%p/%d] 0x%lx/0x%lx: dma complete\n",
buf, buf->vb.i,
(unsigned long)videobuf_to_dma_contig(&buf->vb),
(unsigned long)in_be32(&vr->field_base_addr));
if (waitqueue_active(&buf->vb.done)) {
list_del(&buf->vb.queue);
v4l2_get_timestamp(&buf->vb.ts);
buf->vb.state = VIDEOBUF_DONE;
buf->vb.field_count++;
wake_up(&buf->vb.done);
}
/* activate next dma buffer */
viu_activate_next_buf(dev, vidq);
}
}
static irqreturn_t viu_intr(int irq, void *dev_id)
{
struct viu_dev *dev = (struct viu_dev *)dev_id;
struct viu_reg *vr = dev->vr;
u32 status;
u32 error;
status = in_be32(&vr->status_cfg);
if (status & INT_ERROR_STATUS) {
dev->irqs.error_irq++;
error = status & ERR_MASK;
if (error)
dprintk(1, "Err: error(%d), times:%d!\n",
error >> 4, dev->irqs.error_irq);
/* Clear interrupt error bit and error flags */
out_be32(&vr->status_cfg,
(status & 0xffc0ffff) | INT_ERROR_STATUS);
}
if (status & INT_DMA_END_STATUS) {
dev->irqs.dma_end_irq++;
dev->dma_done = 1;
dprintk(2, "VIU DMA end interrupt times: %d\n",
dev->irqs.dma_end_irq);
}
if (status & INT_HSYNC_STATUS)
dev->irqs.hsync_irq++;
if (status & INT_FIELD_STATUS) {
dev->irqs.field_irq++;
dprintk(2, "VIU field interrupt times: %d\n",
dev->irqs.field_irq);
}
if (status & INT_VSTART_STATUS)
dev->irqs.vstart_irq++;
if (status & INT_VSYNC_STATUS) {
dev->irqs.vsync_irq++;
dprintk(2, "VIU vsync interrupt times: %d\n",
dev->irqs.vsync_irq);
}
/* clear all pending irqs */
status = in_be32(&vr->status_cfg);
out_be32(&vr->status_cfg,
(status & 0xffc0ffff) | (status & INT_ALL_STATUS));
if (dev->ovenable) {
viu_overlay_intr(dev, status);
return IRQ_HANDLED;
}
/* Capture mode */
viu_capture_intr(dev, status);
return IRQ_HANDLED;
}
/*
* File operations for the device
*/
static int viu_open(struct file *file)
{
struct video_device *vdev = video_devdata(file);
struct viu_dev *dev = video_get_drvdata(vdev);
struct viu_fh *fh;
struct viu_reg *vr;
int minor = vdev->minor;
u32 status_cfg;
dprintk(1, "viu: open (minor=%d)\n", minor);
dev->users++;
if (dev->users > 1) {
dev->users--;
return -EBUSY;
}
vr = dev->vr;
dprintk(1, "open minor=%d type=%s users=%d\n", minor,
v4l2_type_names[V4L2_BUF_TYPE_VIDEO_CAPTURE], dev->users);
if (mutex_lock_interruptible(&dev->lock)) {
dev->users--;
return -ERESTARTSYS;
}
/* allocate and initialize per filehandle data */
fh = kzalloc(sizeof(*fh), GFP_KERNEL);
if (!fh) {
dev->users--;
mutex_unlock(&dev->lock);
return -ENOMEM;
}
v4l2_fh_init(&fh->fh, vdev);
file->private_data = fh;
fh->dev = dev;
fh->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
fh->fmt = format_by_fourcc(V4L2_PIX_FMT_RGB32);
fh->width = norm_maxw();
fh->height = norm_maxh();
dev->crop_current.width = fh->width;
dev->crop_current.height = fh->height;
dprintk(1, "Open: fh=0x%08lx, dev=0x%08lx, dev->vidq=0x%08lx\n",
(unsigned long)fh, (unsigned long)dev,
(unsigned long)&dev->vidq);
dprintk(1, "Open: list_empty queued=%d\n",
list_empty(&dev->vidq.queued));
dprintk(1, "Open: list_empty active=%d\n",
list_empty(&dev->vidq.active));
viu_default_settings(vr);
status_cfg = in_be32(&vr->status_cfg);
out_be32(&vr->status_cfg,
status_cfg & ~(INT_VSYNC_EN | INT_HSYNC_EN |
INT_FIELD_EN | INT_VSTART_EN |
INT_DMA_END_EN | INT_ERROR_EN | INT_ECC_EN));
status_cfg = in_be32(&vr->status_cfg);
out_be32(&vr->status_cfg, status_cfg | INT_ALL_STATUS);
spin_lock_init(&fh->vbq_lock);
videobuf_queue_dma_contig_init(&fh->vb_vidq, &viu_video_qops,
dev->dev, &fh->vbq_lock,
fh->type, V4L2_FIELD_INTERLACED,
sizeof(struct viu_buf), fh,
&fh->dev->lock);
v4l2_fh_add(&fh->fh);
mutex_unlock(&dev->lock);
return 0;
}
static ssize_t viu_read(struct file *file, char __user *data, size_t count,
loff_t *ppos)
{
struct viu_fh *fh = file->private_data;
struct viu_dev *dev = fh->dev;
int ret = 0;
dprintk(2, "%s\n", __func__);
if (dev->ovenable)
dev->ovenable = 0;
if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) {
if (mutex_lock_interruptible(&dev->lock))
return -ERESTARTSYS;
viu_start_dma(dev);
ret = videobuf_read_stream(&fh->vb_vidq, data, count,
ppos, 0, file->f_flags & O_NONBLOCK);
mutex_unlock(&dev->lock);
return ret;
}
return 0;
}
static __poll_t viu_poll(struct file *file, struct poll_table_struct *wait)
{
struct viu_fh *fh = file->private_data;
struct videobuf_queue *q = &fh->vb_vidq;
struct viu_dev *dev = fh->dev;
__poll_t req_events = poll_requested_events(wait);
__poll_t res = v4l2_ctrl_poll(file, wait);
if (V4L2_BUF_TYPE_VIDEO_CAPTURE != fh->type)
return EPOLLERR;
if (!(req_events & (EPOLLIN | EPOLLRDNORM)))
return res;
mutex_lock(&dev->lock);
res |= videobuf_poll_stream(file, q, wait);
mutex_unlock(&dev->lock);
return res;
}
static int viu_release(struct file *file)
{
struct viu_fh *fh = file->private_data;
struct viu_dev *dev = fh->dev;
int minor = video_devdata(file)->minor;
mutex_lock(&dev->lock);
viu_stop_dma(dev);
videobuf_stop(&fh->vb_vidq);
videobuf_mmap_free(&fh->vb_vidq);
v4l2_fh_del(&fh->fh);
v4l2_fh_exit(&fh->fh);
mutex_unlock(&dev->lock);
kfree(fh);
dev->users--;
dprintk(1, "close (minor=%d, users=%d)\n",
minor, dev->users);
return 0;
}
void viu_reset(struct viu_reg *reg)
{
out_be32(&reg->status_cfg, 0);
out_be32(&reg->luminance, 0x9512a254);
out_be32(&reg->chroma_r, 0x03310000);
out_be32(&reg->chroma_g, 0x06600f38);
out_be32(&reg->chroma_b, 0x00000409);
out_be32(&reg->field_base_addr, 0);
out_be32(&reg->dma_inc, 0);
out_be32(&reg->picture_count, 0x01e002d0);
out_be32(&reg->req_alarm, 0x00000090);
out_be32(&reg->alpha, 0x000000ff);
}
static int viu_mmap(struct file *file, struct vm_area_struct *vma)
{
struct viu_fh *fh = file->private_data;
struct viu_dev *dev = fh->dev;
int ret;
dprintk(1, "mmap called, vma=0x%08lx\n", (unsigned long)vma);
if (mutex_lock_interruptible(&dev->lock))
return -ERESTARTSYS;
ret = videobuf_mmap_mapper(&fh->vb_vidq, vma);
mutex_unlock(&dev->lock);
dprintk(1, "vma start=0x%08lx, size=%ld, ret=%d\n",
(unsigned long)vma->vm_start,
(unsigned long)vma->vm_end-(unsigned long)vma->vm_start,
ret);
return ret;
}
static const struct v4l2_file_operations viu_fops = {
.owner = THIS_MODULE,
.open = viu_open,
.release = viu_release,
.read = viu_read,
.poll = viu_poll,
.unlocked_ioctl = video_ioctl2, /* V4L2 ioctl handler */
.mmap = viu_mmap,
};
static const struct v4l2_ioctl_ops viu_ioctl_ops = {
.vidioc_querycap = vidioc_querycap,
.vidioc_enum_fmt_vid_cap = vidioc_enum_fmt,
.vidioc_g_fmt_vid_cap = vidioc_g_fmt_cap,
.vidioc_try_fmt_vid_cap = vidioc_try_fmt_cap,
.vidioc_s_fmt_vid_cap = vidioc_s_fmt_cap,
.vidioc_enum_fmt_vid_overlay = vidioc_enum_fmt,
.vidioc_g_fmt_vid_overlay = vidioc_g_fmt_overlay,
.vidioc_try_fmt_vid_overlay = vidioc_try_fmt_overlay,
.vidioc_s_fmt_vid_overlay = vidioc_s_fmt_overlay,
.vidioc_overlay = vidioc_overlay,
.vidioc_g_fbuf = vidioc_g_fbuf,
.vidioc_s_fbuf = vidioc_s_fbuf,
.vidioc_reqbufs = vidioc_reqbufs,
.vidioc_querybuf = vidioc_querybuf,
.vidioc_qbuf = vidioc_qbuf,
.vidioc_dqbuf = vidioc_dqbuf,
.vidioc_g_std = vidioc_g_std,
.vidioc_s_std = vidioc_s_std,
.vidioc_querystd = vidioc_querystd,
.vidioc_enum_input = vidioc_enum_input,
.vidioc_g_input = vidioc_g_input,
.vidioc_s_input = vidioc_s_input,
.vidioc_streamon = vidioc_streamon,
.vidioc_streamoff = vidioc_streamoff,
.vidioc_log_status = v4l2_ctrl_log_status,
.vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
.vidioc_unsubscribe_event = v4l2_event_unsubscribe,
};
static const struct video_device viu_template = {
.name = "FSL viu",
.fops = &viu_fops,
.minor = -1,
.ioctl_ops = &viu_ioctl_ops,
.release = video_device_release,
.tvnorms = V4L2_STD_NTSC_M | V4L2_STD_PAL,
};
static int viu_of_probe(struct platform_device *op)
{
struct viu_dev *viu_dev;
struct video_device *vdev;
struct resource r;
struct viu_reg __iomem *viu_regs;
struct i2c_adapter *ad;
int ret, viu_irq;
struct clk *clk;
ret = of_address_to_resource(op->dev.of_node, 0, &r);
if (ret) {
dev_err(&op->dev, "Can't parse device node resource\n");
return -ENODEV;
}
viu_irq = irq_of_parse_and_map(op->dev.of_node, 0);
if (viu_irq == NO_IRQ) {
dev_err(&op->dev, "Error while mapping the irq\n");
return -EINVAL;
}
/* request mem region */
if (!devm_request_mem_region(&op->dev, r.start,
sizeof(struct viu_reg), DRV_NAME)) {
dev_err(&op->dev, "Error while requesting mem region\n");
ret = -EBUSY;
goto err;
}
/* remap registers */
viu_regs = devm_ioremap(&op->dev, r.start, sizeof(struct viu_reg));
if (!viu_regs) {
dev_err(&op->dev, "Can't map register set\n");
ret = -ENOMEM;
goto err;
}
/* Prepare our private structure */
viu_dev = devm_kzalloc(&op->dev, sizeof(struct viu_dev), GFP_ATOMIC);
if (!viu_dev) {
dev_err(&op->dev, "Can't allocate private structure\n");
ret = -ENOMEM;
goto err;
}
viu_dev->vr = viu_regs;
viu_dev->irq = viu_irq;
viu_dev->dev = &op->dev;
/* init video dma queues */
INIT_LIST_HEAD(&viu_dev->vidq.active);
INIT_LIST_HEAD(&viu_dev->vidq.queued);
snprintf(viu_dev->v4l2_dev.name,
sizeof(viu_dev->v4l2_dev.name), "%s", "VIU");
ret = v4l2_device_register(viu_dev->dev, &viu_dev->v4l2_dev);
if (ret < 0) {
dev_err(&op->dev, "v4l2_device_register() failed: %d\n", ret);
goto err;
}
ad = i2c_get_adapter(0);
v4l2_ctrl_handler_init(&viu_dev->hdl, 5);
if (viu_dev->hdl.error) {
ret = viu_dev->hdl.error;
dev_err(&op->dev, "couldn't register control\n");
goto err_vdev;
}
/* This control handler will inherit the control(s) from the
sub-device(s). */
viu_dev->v4l2_dev.ctrl_handler = &viu_dev->hdl;
viu_dev->decoder = v4l2_i2c_new_subdev(&viu_dev->v4l2_dev, ad,
"saa7113", VIU_VIDEO_DECODER_ADDR, NULL);
timer_setup(&viu_dev->vidq.timeout, viu_vid_timeout, 0);
viu_dev->std = V4L2_STD_NTSC_M;
viu_dev->first = 1;
/* Allocate memory for video device */
vdev = video_device_alloc();
if (vdev == NULL) {
ret = -ENOMEM;
goto err_vdev;
}
*vdev = viu_template;
vdev->v4l2_dev = &viu_dev->v4l2_dev;
viu_dev->vdev = vdev;
/* initialize locks */
mutex_init(&viu_dev->lock);
viu_dev->vdev->lock = &viu_dev->lock;
spin_lock_init(&viu_dev->slock);
video_set_drvdata(viu_dev->vdev, viu_dev);
mutex_lock(&viu_dev->lock);
ret = video_register_device(viu_dev->vdev, VFL_TYPE_GRABBER, -1);
if (ret < 0) {
video_device_release(viu_dev->vdev);
goto err_vdev;
}
/* enable VIU clock */
clk = devm_clk_get(&op->dev, "ipg");
if (IS_ERR(clk)) {
dev_err(&op->dev, "failed to lookup the clock!\n");
ret = PTR_ERR(clk);
goto err_clk;
}
ret = clk_prepare_enable(clk);
if (ret) {
dev_err(&op->dev, "failed to enable the clock!\n");
goto err_clk;
}
viu_dev->clk = clk;
/* reset VIU module */
viu_reset(viu_dev->vr);
/* install interrupt handler */
if (request_irq(viu_dev->irq, viu_intr, 0, "viu", (void *)viu_dev)) {
dev_err(&op->dev, "Request VIU IRQ failed.\n");
ret = -ENODEV;
goto err_irq;
}
mutex_unlock(&viu_dev->lock);
dev_info(&op->dev, "Freescale VIU Video Capture Board\n");
return ret;
err_irq:
clk_disable_unprepare(viu_dev->clk);
err_clk:
video_unregister_device(viu_dev->vdev);
err_vdev:
v4l2_ctrl_handler_free(&viu_dev->hdl);
mutex_unlock(&viu_dev->lock);
i2c_put_adapter(ad);
v4l2_device_unregister(&viu_dev->v4l2_dev);
err:
irq_dispose_mapping(viu_irq);
return ret;
}
static int viu_of_remove(struct platform_device *op)
{
struct v4l2_device *v4l2_dev = dev_get_drvdata(&op->dev);
struct viu_dev *dev = container_of(v4l2_dev, struct viu_dev, v4l2_dev);
struct v4l2_subdev *sdev = list_entry(v4l2_dev->subdevs.next,
struct v4l2_subdev, list);
struct i2c_client *client = v4l2_get_subdevdata(sdev);
free_irq(dev->irq, (void *)dev);
irq_dispose_mapping(dev->irq);
clk_disable_unprepare(dev->clk);
v4l2_ctrl_handler_free(&dev->hdl);
video_unregister_device(dev->vdev);
i2c_put_adapter(client->adapter);
v4l2_device_unregister(&dev->v4l2_dev);
return 0;
}
#ifdef CONFIG_PM
static int viu_suspend(struct platform_device *op, pm_message_t state)
{
struct v4l2_device *v4l2_dev = dev_get_drvdata(&op->dev);
struct viu_dev *dev = container_of(v4l2_dev, struct viu_dev, v4l2_dev);
clk_disable(dev->clk);
return 0;
}
static int viu_resume(struct platform_device *op)
{
struct v4l2_device *v4l2_dev = dev_get_drvdata(&op->dev);
struct viu_dev *dev = container_of(v4l2_dev, struct viu_dev, v4l2_dev);
clk_enable(dev->clk);
return 0;
}
#endif
/*
* Initialization and module stuff
*/
static const struct of_device_id mpc512x_viu_of_match[] = {
{
.compatible = "fsl,mpc5121-viu",
},
{},
};
MODULE_DEVICE_TABLE(of, mpc512x_viu_of_match);
static struct platform_driver viu_of_platform_driver = {
.probe = viu_of_probe,
.remove = viu_of_remove,
#ifdef CONFIG_PM
.suspend = viu_suspend,
.resume = viu_resume,
#endif
.driver = {
.name = DRV_NAME,
.of_match_table = mpc512x_viu_of_match,
},
};
module_platform_driver(viu_of_platform_driver);
MODULE_DESCRIPTION("Freescale Video-In(VIU)");
MODULE_AUTHOR("Hongjun Chen");
MODULE_LICENSE("GPL");
MODULE_VERSION(VIU_VERSION);
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