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path: root/drivers/media/platform/timblogiw.c
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Diffstat (limited to 'drivers/media/platform/timblogiw.c')
-rw-r--r--drivers/media/platform/timblogiw.c880
1 files changed, 880 insertions, 0 deletions
diff --git a/drivers/media/platform/timblogiw.c b/drivers/media/platform/timblogiw.c
new file mode 100644
index 000000000000..02194c056b00
--- /dev/null
+++ b/drivers/media/platform/timblogiw.c
@@ -0,0 +1,880 @@
+/*
+ * timblogiw.c timberdale FPGA LogiWin Video In driver
+ * Copyright (c) 2009-2010 Intel Corporation
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+/* Supports:
+ * Timberdale FPGA LogiWin Video In
+ */
+
+#include <linux/platform_device.h>
+#include <linux/slab.h>
+#include <linux/dmaengine.h>
+#include <linux/scatterlist.h>
+#include <linux/interrupt.h>
+#include <linux/list.h>
+#include <linux/i2c.h>
+#include <linux/module.h>
+#include <media/v4l2-ioctl.h>
+#include <media/v4l2-device.h>
+#include <media/videobuf-dma-contig.h>
+#include <media/timb_video.h>
+
+#define DRIVER_NAME "timb-video"
+
+#define TIMBLOGIWIN_NAME "Timberdale Video-In"
+#define TIMBLOGIW_VERSION_CODE 0x04
+
+#define TIMBLOGIW_LINES_PER_DESC 44
+#define TIMBLOGIW_MAX_VIDEO_MEM 16
+
+#define TIMBLOGIW_HAS_DECODER(lw) (lw->pdata.encoder.module_name)
+
+
+struct timblogiw {
+ struct video_device video_dev;
+ struct v4l2_device v4l2_dev; /* mutual exclusion */
+ struct mutex lock;
+ struct device *dev;
+ struct timb_video_platform_data pdata;
+ struct v4l2_subdev *sd_enc; /* encoder */
+ bool opened;
+};
+
+struct timblogiw_tvnorm {
+ v4l2_std_id std;
+ u16 width;
+ u16 height;
+ u8 fps;
+};
+
+struct timblogiw_fh {
+ struct videobuf_queue vb_vidq;
+ struct timblogiw_tvnorm const *cur_norm;
+ struct list_head capture;
+ struct dma_chan *chan;
+ spinlock_t queue_lock; /* mutual exclusion */
+ unsigned int frame_count;
+};
+
+struct timblogiw_buffer {
+ /* common v4l buffer stuff -- must be first */
+ struct videobuf_buffer vb;
+ struct scatterlist sg[16];
+ dma_cookie_t cookie;
+ struct timblogiw_fh *fh;
+};
+
+const struct timblogiw_tvnorm timblogiw_tvnorms[] = {
+ {
+ .std = V4L2_STD_PAL,
+ .width = 720,
+ .height = 576,
+ .fps = 25
+ },
+ {
+ .std = V4L2_STD_NTSC,
+ .width = 720,
+ .height = 480,
+ .fps = 30
+ }
+};
+
+static int timblogiw_bytes_per_line(const struct timblogiw_tvnorm *norm)
+{
+ return norm->width * 2;
+}
+
+
+static int timblogiw_frame_size(const struct timblogiw_tvnorm *norm)
+{
+ return norm->height * timblogiw_bytes_per_line(norm);
+}
+
+static const struct timblogiw_tvnorm *timblogiw_get_norm(const v4l2_std_id std)
+{
+ int i;
+ for (i = 0; i < ARRAY_SIZE(timblogiw_tvnorms); i++)
+ if (timblogiw_tvnorms[i].std & std)
+ return timblogiw_tvnorms + i;
+
+ /* default to first element */
+ return timblogiw_tvnorms;
+}
+
+static void timblogiw_dma_cb(void *data)
+{
+ struct timblogiw_buffer *buf = data;
+ struct timblogiw_fh *fh = buf->fh;
+ struct videobuf_buffer *vb = &buf->vb;
+
+ spin_lock(&fh->queue_lock);
+
+ /* mark the transfer done */
+ buf->cookie = -1;
+
+ fh->frame_count++;
+
+ if (vb->state != VIDEOBUF_ERROR) {
+ list_del(&vb->queue);
+ do_gettimeofday(&vb->ts);
+ vb->field_count = fh->frame_count * 2;
+ vb->state = VIDEOBUF_DONE;
+
+ wake_up(&vb->done);
+ }
+
+ if (!list_empty(&fh->capture)) {
+ vb = list_entry(fh->capture.next, struct videobuf_buffer,
+ queue);
+ vb->state = VIDEOBUF_ACTIVE;
+ }
+
+ spin_unlock(&fh->queue_lock);
+}
+
+static bool timblogiw_dma_filter_fn(struct dma_chan *chan, void *filter_param)
+{
+ return chan->chan_id == (uintptr_t)filter_param;
+}
+
+/* IOCTL functions */
+
+static int timblogiw_g_fmt(struct file *file, void *priv,
+ struct v4l2_format *format)
+{
+ struct video_device *vdev = video_devdata(file);
+ struct timblogiw *lw = video_get_drvdata(vdev);
+ struct timblogiw_fh *fh = priv;
+
+ dev_dbg(&vdev->dev, "%s entry\n", __func__);
+
+ if (format->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
+ return -EINVAL;
+
+ mutex_lock(&lw->lock);
+
+ format->fmt.pix.width = fh->cur_norm->width;
+ format->fmt.pix.height = fh->cur_norm->height;
+ format->fmt.pix.pixelformat = V4L2_PIX_FMT_UYVY;
+ format->fmt.pix.bytesperline = timblogiw_bytes_per_line(fh->cur_norm);
+ format->fmt.pix.sizeimage = timblogiw_frame_size(fh->cur_norm);
+ format->fmt.pix.field = V4L2_FIELD_NONE;
+
+ mutex_unlock(&lw->lock);
+
+ return 0;
+}
+
+static int timblogiw_try_fmt(struct file *file, void *priv,
+ struct v4l2_format *format)
+{
+ struct video_device *vdev = video_devdata(file);
+ struct v4l2_pix_format *pix = &format->fmt.pix;
+
+ dev_dbg(&vdev->dev,
+ "%s - width=%d, height=%d, pixelformat=%d, field=%d\n"
+ "bytes per line %d, size image: %d, colorspace: %d\n",
+ __func__,
+ pix->width, pix->height, pix->pixelformat, pix->field,
+ pix->bytesperline, pix->sizeimage, pix->colorspace);
+
+ if (format->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
+ return -EINVAL;
+
+ if (pix->field != V4L2_FIELD_NONE)
+ return -EINVAL;
+
+ if (pix->pixelformat != V4L2_PIX_FMT_UYVY)
+ return -EINVAL;
+
+ return 0;
+}
+
+static int timblogiw_s_fmt(struct file *file, void *priv,
+ struct v4l2_format *format)
+{
+ struct video_device *vdev = video_devdata(file);
+ struct timblogiw *lw = video_get_drvdata(vdev);
+ struct timblogiw_fh *fh = priv;
+ struct v4l2_pix_format *pix = &format->fmt.pix;
+ int err;
+
+ mutex_lock(&lw->lock);
+
+ err = timblogiw_try_fmt(file, priv, format);
+ if (err)
+ goto out;
+
+ if (videobuf_queue_is_busy(&fh->vb_vidq)) {
+ dev_err(&vdev->dev, "%s queue busy\n", __func__);
+ err = -EBUSY;
+ goto out;
+ }
+
+ pix->width = fh->cur_norm->width;
+ pix->height = fh->cur_norm->height;
+
+out:
+ mutex_unlock(&lw->lock);
+ return err;
+}
+
+static int timblogiw_querycap(struct file *file, void *priv,
+ struct v4l2_capability *cap)
+{
+ struct video_device *vdev = video_devdata(file);
+
+ dev_dbg(&vdev->dev, "%s: Entry\n", __func__);
+ memset(cap, 0, sizeof(*cap));
+ strncpy(cap->card, TIMBLOGIWIN_NAME, sizeof(cap->card)-1);
+ strncpy(cap->driver, DRIVER_NAME, sizeof(cap->driver) - 1);
+ strlcpy(cap->bus_info, vdev->name, sizeof(cap->bus_info));
+ cap->version = TIMBLOGIW_VERSION_CODE;
+ cap->capabilities = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING |
+ V4L2_CAP_READWRITE;
+
+ return 0;
+}
+
+static int timblogiw_enum_fmt(struct file *file, void *priv,
+ struct v4l2_fmtdesc *fmt)
+{
+ struct video_device *vdev = video_devdata(file);
+
+ dev_dbg(&vdev->dev, "%s, index: %d\n", __func__, fmt->index);
+
+ if (fmt->index != 0)
+ return -EINVAL;
+ memset(fmt, 0, sizeof(*fmt));
+ fmt->index = 0;
+ fmt->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+ strncpy(fmt->description, "4:2:2, packed, YUYV",
+ sizeof(fmt->description)-1);
+ fmt->pixelformat = V4L2_PIX_FMT_UYVY;
+
+ return 0;
+}
+
+static int timblogiw_g_parm(struct file *file, void *priv,
+ struct v4l2_streamparm *sp)
+{
+ struct timblogiw_fh *fh = priv;
+ struct v4l2_captureparm *cp = &sp->parm.capture;
+
+ cp->capability = V4L2_CAP_TIMEPERFRAME;
+ cp->timeperframe.numerator = 1;
+ cp->timeperframe.denominator = fh->cur_norm->fps;
+
+ return 0;
+}
+
+static int timblogiw_reqbufs(struct file *file, void *priv,
+ struct v4l2_requestbuffers *rb)
+{
+ struct video_device *vdev = video_devdata(file);
+ struct timblogiw_fh *fh = priv;
+
+ dev_dbg(&vdev->dev, "%s: entry\n", __func__);
+
+ return videobuf_reqbufs(&fh->vb_vidq, rb);
+}
+
+static int timblogiw_querybuf(struct file *file, void *priv,
+ struct v4l2_buffer *b)
+{
+ struct video_device *vdev = video_devdata(file);
+ struct timblogiw_fh *fh = priv;
+
+ dev_dbg(&vdev->dev, "%s: entry\n", __func__);
+
+ return videobuf_querybuf(&fh->vb_vidq, b);
+}
+
+static int timblogiw_qbuf(struct file *file, void *priv, struct v4l2_buffer *b)
+{
+ struct video_device *vdev = video_devdata(file);
+ struct timblogiw_fh *fh = priv;
+
+ dev_dbg(&vdev->dev, "%s: entry\n", __func__);
+
+ return videobuf_qbuf(&fh->vb_vidq, b);
+}
+
+static int timblogiw_dqbuf(struct file *file, void *priv,
+ struct v4l2_buffer *b)
+{
+ struct video_device *vdev = video_devdata(file);
+ struct timblogiw_fh *fh = priv;
+
+ dev_dbg(&vdev->dev, "%s: entry\n", __func__);
+
+ return videobuf_dqbuf(&fh->vb_vidq, b, file->f_flags & O_NONBLOCK);
+}
+
+static int timblogiw_g_std(struct file *file, void *priv, v4l2_std_id *std)
+{
+ struct video_device *vdev = video_devdata(file);
+ struct timblogiw_fh *fh = priv;
+
+ dev_dbg(&vdev->dev, "%s: entry\n", __func__);
+
+ *std = fh->cur_norm->std;
+ return 0;
+}
+
+static int timblogiw_s_std(struct file *file, void *priv, v4l2_std_id *std)
+{
+ struct video_device *vdev = video_devdata(file);
+ struct timblogiw *lw = video_get_drvdata(vdev);
+ struct timblogiw_fh *fh = priv;
+ int err = 0;
+
+ dev_dbg(&vdev->dev, "%s: entry\n", __func__);
+
+ mutex_lock(&lw->lock);
+
+ if (TIMBLOGIW_HAS_DECODER(lw))
+ err = v4l2_subdev_call(lw->sd_enc, core, s_std, *std);
+
+ if (!err)
+ fh->cur_norm = timblogiw_get_norm(*std);
+
+ mutex_unlock(&lw->lock);
+
+ return err;
+}
+
+static int timblogiw_enuminput(struct file *file, void *priv,
+ struct v4l2_input *inp)
+{
+ struct video_device *vdev = video_devdata(file);
+ int i;
+
+ dev_dbg(&vdev->dev, "%s: Entry\n", __func__);
+
+ if (inp->index != 0)
+ return -EINVAL;
+
+ inp->index = 0;
+
+ strncpy(inp->name, "Timb input 1", sizeof(inp->name) - 1);
+ inp->type = V4L2_INPUT_TYPE_CAMERA;
+
+ inp->std = 0;
+ for (i = 0; i < ARRAY_SIZE(timblogiw_tvnorms); i++)
+ inp->std |= timblogiw_tvnorms[i].std;
+
+ return 0;
+}
+
+static int timblogiw_g_input(struct file *file, void *priv,
+ unsigned int *input)
+{
+ struct video_device *vdev = video_devdata(file);
+
+ dev_dbg(&vdev->dev, "%s: Entry\n", __func__);
+
+ *input = 0;
+
+ return 0;
+}
+
+static int timblogiw_s_input(struct file *file, void *priv, unsigned int input)
+{
+ struct video_device *vdev = video_devdata(file);
+
+ dev_dbg(&vdev->dev, "%s: Entry\n", __func__);
+
+ if (input != 0)
+ return -EINVAL;
+ return 0;
+}
+
+static int timblogiw_streamon(struct file *file, void *priv, unsigned int type)
+{
+ struct video_device *vdev = video_devdata(file);
+ struct timblogiw_fh *fh = priv;
+
+ dev_dbg(&vdev->dev, "%s: entry\n", __func__);
+
+ if (type != V4L2_BUF_TYPE_VIDEO_CAPTURE) {
+ dev_dbg(&vdev->dev, "%s - No capture device\n", __func__);
+ return -EINVAL;
+ }
+
+ fh->frame_count = 0;
+ return videobuf_streamon(&fh->vb_vidq);
+}
+
+static int timblogiw_streamoff(struct file *file, void *priv,
+ unsigned int type)
+{
+ struct video_device *vdev = video_devdata(file);
+ struct timblogiw_fh *fh = priv;
+
+ dev_dbg(&vdev->dev, "%s entry\n", __func__);
+
+ if (type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
+ return -EINVAL;
+
+ return videobuf_streamoff(&fh->vb_vidq);
+}
+
+static int timblogiw_querystd(struct file *file, void *priv, v4l2_std_id *std)
+{
+ struct video_device *vdev = video_devdata(file);
+ struct timblogiw *lw = video_get_drvdata(vdev);
+ struct timblogiw_fh *fh = priv;
+
+ dev_dbg(&vdev->dev, "%s entry\n", __func__);
+
+ if (TIMBLOGIW_HAS_DECODER(lw))
+ return v4l2_subdev_call(lw->sd_enc, video, querystd, std);
+ else {
+ *std = fh->cur_norm->std;
+ return 0;
+ }
+}
+
+static int timblogiw_enum_framesizes(struct file *file, void *priv,
+ struct v4l2_frmsizeenum *fsize)
+{
+ struct video_device *vdev = video_devdata(file);
+ struct timblogiw_fh *fh = priv;
+
+ dev_dbg(&vdev->dev, "%s - index: %d, format: %d\n", __func__,
+ fsize->index, fsize->pixel_format);
+
+ if ((fsize->index != 0) ||
+ (fsize->pixel_format != V4L2_PIX_FMT_UYVY))
+ return -EINVAL;
+
+ fsize->type = V4L2_FRMSIZE_TYPE_DISCRETE;
+ fsize->discrete.width = fh->cur_norm->width;
+ fsize->discrete.height = fh->cur_norm->height;
+
+ return 0;
+}
+
+/* Video buffer functions */
+
+static int buffer_setup(struct videobuf_queue *vq, unsigned int *count,
+ unsigned int *size)
+{
+ struct timblogiw_fh *fh = vq->priv_data;
+
+ *size = timblogiw_frame_size(fh->cur_norm);
+
+ if (!*count)
+ *count = 32;
+
+ while (*size * *count > TIMBLOGIW_MAX_VIDEO_MEM * 1024 * 1024)
+ (*count)--;
+
+ return 0;
+}
+
+static int buffer_prepare(struct videobuf_queue *vq, struct videobuf_buffer *vb,
+ enum v4l2_field field)
+{
+ struct timblogiw_fh *fh = vq->priv_data;
+ struct timblogiw_buffer *buf = container_of(vb, struct timblogiw_buffer,
+ vb);
+ unsigned int data_size = timblogiw_frame_size(fh->cur_norm);
+ int err = 0;
+
+ if (vb->baddr && vb->bsize < data_size)
+ /* User provided buffer, but it is too small */
+ return -ENOMEM;
+
+ vb->size = data_size;
+ vb->width = fh->cur_norm->width;
+ vb->height = fh->cur_norm->height;
+ vb->field = field;
+
+ if (vb->state == VIDEOBUF_NEEDS_INIT) {
+ int i;
+ unsigned int size;
+ unsigned int bytes_per_desc = TIMBLOGIW_LINES_PER_DESC *
+ timblogiw_bytes_per_line(fh->cur_norm);
+ dma_addr_t addr;
+
+ sg_init_table(buf->sg, ARRAY_SIZE(buf->sg));
+
+ err = videobuf_iolock(vq, vb, NULL);
+ if (err)
+ goto err;
+
+ addr = videobuf_to_dma_contig(vb);
+ for (i = 0, size = 0; size < data_size; i++) {
+ sg_dma_address(buf->sg + i) = addr + size;
+ size += bytes_per_desc;
+ sg_dma_len(buf->sg + i) = (size > data_size) ?
+ (bytes_per_desc - (size - data_size)) :
+ bytes_per_desc;
+ }
+
+ vb->state = VIDEOBUF_PREPARED;
+ buf->cookie = -1;
+ buf->fh = fh;
+ }
+
+ return 0;
+
+err:
+ videobuf_dma_contig_free(vq, vb);
+ vb->state = VIDEOBUF_NEEDS_INIT;
+ return err;
+}
+
+static void buffer_queue(struct videobuf_queue *vq, struct videobuf_buffer *vb)
+{
+ struct timblogiw_fh *fh = vq->priv_data;
+ struct timblogiw_buffer *buf = container_of(vb, struct timblogiw_buffer,
+ vb);
+ struct dma_async_tx_descriptor *desc;
+ int sg_elems;
+ int bytes_per_desc = TIMBLOGIW_LINES_PER_DESC *
+ timblogiw_bytes_per_line(fh->cur_norm);
+
+ sg_elems = timblogiw_frame_size(fh->cur_norm) / bytes_per_desc;
+ sg_elems +=
+ (timblogiw_frame_size(fh->cur_norm) % bytes_per_desc) ? 1 : 0;
+
+ if (list_empty(&fh->capture))
+ vb->state = VIDEOBUF_ACTIVE;
+ else
+ vb->state = VIDEOBUF_QUEUED;
+
+ list_add_tail(&vb->queue, &fh->capture);
+
+ spin_unlock_irq(&fh->queue_lock);
+
+ desc = dmaengine_prep_slave_sg(fh->chan,
+ buf->sg, sg_elems, DMA_DEV_TO_MEM,
+ DMA_PREP_INTERRUPT | DMA_COMPL_SKIP_SRC_UNMAP);
+ if (!desc) {
+ spin_lock_irq(&fh->queue_lock);
+ list_del_init(&vb->queue);
+ vb->state = VIDEOBUF_PREPARED;
+ return;
+ }
+
+ desc->callback_param = buf;
+ desc->callback = timblogiw_dma_cb;
+
+ buf->cookie = desc->tx_submit(desc);
+
+ spin_lock_irq(&fh->queue_lock);
+}
+
+static void buffer_release(struct videobuf_queue *vq,
+ struct videobuf_buffer *vb)
+{
+ struct timblogiw_fh *fh = vq->priv_data;
+ struct timblogiw_buffer *buf = container_of(vb, struct timblogiw_buffer,
+ vb);
+
+ videobuf_waiton(vq, vb, 0, 0);
+ if (buf->cookie >= 0)
+ dma_sync_wait(fh->chan, buf->cookie);
+
+ videobuf_dma_contig_free(vq, vb);
+ vb->state = VIDEOBUF_NEEDS_INIT;
+}
+
+static struct videobuf_queue_ops timblogiw_video_qops = {
+ .buf_setup = buffer_setup,
+ .buf_prepare = buffer_prepare,
+ .buf_queue = buffer_queue,
+ .buf_release = buffer_release,
+};
+
+/* Device Operations functions */
+
+static int timblogiw_open(struct file *file)
+{
+ struct video_device *vdev = video_devdata(file);
+ struct timblogiw *lw = video_get_drvdata(vdev);
+ struct timblogiw_fh *fh;
+ v4l2_std_id std;
+ dma_cap_mask_t mask;
+ int err = 0;
+
+ dev_dbg(&vdev->dev, "%s: entry\n", __func__);
+
+ mutex_lock(&lw->lock);
+ if (lw->opened) {
+ err = -EBUSY;
+ goto out;
+ }
+
+ if (TIMBLOGIW_HAS_DECODER(lw) && !lw->sd_enc) {
+ struct i2c_adapter *adapt;
+
+ /* find the video decoder */
+ adapt = i2c_get_adapter(lw->pdata.i2c_adapter);
+ if (!adapt) {
+ dev_err(&vdev->dev, "No I2C bus #%d\n",
+ lw->pdata.i2c_adapter);
+ err = -ENODEV;
+ goto out;
+ }
+
+ /* now find the encoder */
+ lw->sd_enc = v4l2_i2c_new_subdev_board(&lw->v4l2_dev, adapt,
+ lw->pdata.encoder.info, NULL);
+
+ i2c_put_adapter(adapt);
+
+ if (!lw->sd_enc) {
+ dev_err(&vdev->dev, "Failed to get encoder: %s\n",
+ lw->pdata.encoder.module_name);
+ err = -ENODEV;
+ goto out;
+ }
+ }
+
+ fh = kzalloc(sizeof(*fh), GFP_KERNEL);
+ if (!fh) {
+ err = -ENOMEM;
+ goto out;
+ }
+
+ fh->cur_norm = timblogiw_tvnorms;
+ timblogiw_querystd(file, fh, &std);
+ fh->cur_norm = timblogiw_get_norm(std);
+
+ INIT_LIST_HEAD(&fh->capture);
+ spin_lock_init(&fh->queue_lock);
+
+ dma_cap_zero(mask);
+ dma_cap_set(DMA_SLAVE, mask);
+ dma_cap_set(DMA_PRIVATE, mask);
+
+ /* find the DMA channel */
+ fh->chan = dma_request_channel(mask, timblogiw_dma_filter_fn,
+ (void *)(uintptr_t)lw->pdata.dma_channel);
+ if (!fh->chan) {
+ dev_err(&vdev->dev, "Failed to get DMA channel\n");
+ kfree(fh);
+ err = -ENODEV;
+ goto out;
+ }
+
+ file->private_data = fh;
+ videobuf_queue_dma_contig_init(&fh->vb_vidq,
+ &timblogiw_video_qops, lw->dev, &fh->queue_lock,
+ V4L2_BUF_TYPE_VIDEO_CAPTURE, V4L2_FIELD_NONE,
+ sizeof(struct timblogiw_buffer), fh, NULL);
+
+ lw->opened = true;
+out:
+ mutex_unlock(&lw->lock);
+
+ return err;
+}
+
+static int timblogiw_close(struct file *file)
+{
+ struct video_device *vdev = video_devdata(file);
+ struct timblogiw *lw = video_get_drvdata(vdev);
+ struct timblogiw_fh *fh = file->private_data;
+
+ dev_dbg(&vdev->dev, "%s: Entry\n", __func__);
+
+ videobuf_stop(&fh->vb_vidq);
+ videobuf_mmap_free(&fh->vb_vidq);
+
+ dma_release_channel(fh->chan);
+
+ kfree(fh);
+
+ mutex_lock(&lw->lock);
+ lw->opened = false;
+ mutex_unlock(&lw->lock);
+ return 0;
+}
+
+static ssize_t timblogiw_read(struct file *file, char __user *data,
+ size_t count, loff_t *ppos)
+{
+ struct video_device *vdev = video_devdata(file);
+ struct timblogiw_fh *fh = file->private_data;
+
+ dev_dbg(&vdev->dev, "%s: entry\n", __func__);
+
+ return videobuf_read_stream(&fh->vb_vidq, data, count, ppos, 0,
+ file->f_flags & O_NONBLOCK);
+}
+
+static unsigned int timblogiw_poll(struct file *file,
+ struct poll_table_struct *wait)
+{
+ struct video_device *vdev = video_devdata(file);
+ struct timblogiw_fh *fh = file->private_data;
+
+ dev_dbg(&vdev->dev, "%s: entry\n", __func__);
+
+ return videobuf_poll_stream(file, &fh->vb_vidq, wait);
+}
+
+static int timblogiw_mmap(struct file *file, struct vm_area_struct *vma)
+{
+ struct video_device *vdev = video_devdata(file);
+ struct timblogiw_fh *fh = file->private_data;
+
+ dev_dbg(&vdev->dev, "%s: entry\n", __func__);
+
+ return videobuf_mmap_mapper(&fh->vb_vidq, vma);
+}
+
+/* Platform device functions */
+
+static __devinitconst struct v4l2_ioctl_ops timblogiw_ioctl_ops = {
+ .vidioc_querycap = timblogiw_querycap,
+ .vidioc_enum_fmt_vid_cap = timblogiw_enum_fmt,
+ .vidioc_g_fmt_vid_cap = timblogiw_g_fmt,
+ .vidioc_try_fmt_vid_cap = timblogiw_try_fmt,
+ .vidioc_s_fmt_vid_cap = timblogiw_s_fmt,
+ .vidioc_g_parm = timblogiw_g_parm,
+ .vidioc_reqbufs = timblogiw_reqbufs,
+ .vidioc_querybuf = timblogiw_querybuf,
+ .vidioc_qbuf = timblogiw_qbuf,
+ .vidioc_dqbuf = timblogiw_dqbuf,
+ .vidioc_g_std = timblogiw_g_std,
+ .vidioc_s_std = timblogiw_s_std,
+ .vidioc_enum_input = timblogiw_enuminput,
+ .vidioc_g_input = timblogiw_g_input,
+ .vidioc_s_input = timblogiw_s_input,
+ .vidioc_streamon = timblogiw_streamon,
+ .vidioc_streamoff = timblogiw_streamoff,
+ .vidioc_querystd = timblogiw_querystd,
+ .vidioc_enum_framesizes = timblogiw_enum_framesizes,
+};
+
+static __devinitconst struct v4l2_file_operations timblogiw_fops = {
+ .owner = THIS_MODULE,
+ .open = timblogiw_open,
+ .release = timblogiw_close,
+ .unlocked_ioctl = video_ioctl2, /* V4L2 ioctl handler */
+ .mmap = timblogiw_mmap,
+ .read = timblogiw_read,
+ .poll = timblogiw_poll,
+};
+
+static __devinitconst struct video_device timblogiw_template = {
+ .name = TIMBLOGIWIN_NAME,
+ .fops = &timblogiw_fops,
+ .ioctl_ops = &timblogiw_ioctl_ops,
+ .release = video_device_release_empty,
+ .minor = -1,
+ .tvnorms = V4L2_STD_PAL | V4L2_STD_NTSC
+};
+
+static int __devinit timblogiw_probe(struct platform_device *pdev)
+{
+ int err;
+ struct timblogiw *lw = NULL;
+ struct timb_video_platform_data *pdata = pdev->dev.platform_data;
+
+ if (!pdata) {
+ dev_err(&pdev->dev, "No platform data\n");
+ err = -EINVAL;
+ goto err;
+ }
+
+ if (!pdata->encoder.module_name)
+ dev_info(&pdev->dev, "Running without decoder\n");
+
+ lw = kzalloc(sizeof(*lw), GFP_KERNEL);
+ if (!lw) {
+ err = -ENOMEM;
+ goto err;
+ }
+
+ if (pdev->dev.parent)
+ lw->dev = pdev->dev.parent;
+ else
+ lw->dev = &pdev->dev;
+
+ memcpy(&lw->pdata, pdata, sizeof(lw->pdata));
+
+ mutex_init(&lw->lock);
+
+ lw->video_dev = timblogiw_template;
+
+ strlcpy(lw->v4l2_dev.name, DRIVER_NAME, sizeof(lw->v4l2_dev.name));
+ err = v4l2_device_register(NULL, &lw->v4l2_dev);
+ if (err)
+ goto err_register;
+
+ lw->video_dev.v4l2_dev = &lw->v4l2_dev;
+
+ platform_set_drvdata(pdev, lw);
+ video_set_drvdata(&lw->video_dev, lw);
+
+ err = video_register_device(&lw->video_dev, VFL_TYPE_GRABBER, 0);
+ if (err) {
+ dev_err(&pdev->dev, "Error reg video: %d\n", err);
+ goto err_request;
+ }
+
+
+ return 0;
+
+err_request:
+ platform_set_drvdata(pdev, NULL);
+ v4l2_device_unregister(&lw->v4l2_dev);
+err_register:
+ kfree(lw);
+err:
+ dev_err(&pdev->dev, "Failed to register: %d\n", err);
+
+ return err;
+}
+
+static int __devexit timblogiw_remove(struct platform_device *pdev)
+{
+ struct timblogiw *lw = platform_get_drvdata(pdev);
+
+ video_unregister_device(&lw->video_dev);
+
+ v4l2_device_unregister(&lw->v4l2_dev);
+
+ kfree(lw);
+
+ platform_set_drvdata(pdev, NULL);
+
+ return 0;
+}
+
+static struct platform_driver timblogiw_platform_driver = {
+ .driver = {
+ .name = DRIVER_NAME,
+ .owner = THIS_MODULE,
+ },
+ .probe = timblogiw_probe,
+ .remove = __devexit_p(timblogiw_remove),
+};
+
+module_platform_driver(timblogiw_platform_driver);
+
+MODULE_DESCRIPTION(TIMBLOGIWIN_NAME);
+MODULE_AUTHOR("Pelagicore AB <info@pelagicore.com>");
+MODULE_LICENSE("GPL v2");
+MODULE_ALIAS("platform:"DRIVER_NAME);

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