diff options
Diffstat (limited to 'drivers/media/parport/bw-qcam.c')
| -rw-r--r-- | drivers/media/parport/bw-qcam.c | 157 |
1 files changed, 111 insertions, 46 deletions
diff --git a/drivers/media/parport/bw-qcam.c b/drivers/media/parport/bw-qcam.c index 497b342b0f7..d3fe34f14c0 100644 --- a/drivers/media/parport/bw-qcam.c +++ b/drivers/media/parport/bw-qcam.c @@ -80,6 +80,7 @@ OTHER DEALINGS IN THE SOFTWARE. #include <media/v4l2-fh.h> #include <media/v4l2-ctrls.h> #include <media/v4l2-event.h> +#include <media/videobuf2-vmalloc.h> /* One from column A... */ #define QC_NOTSET 0 @@ -107,9 +108,11 @@ struct qcam { struct v4l2_device v4l2_dev; struct video_device vdev; struct v4l2_ctrl_handler hdl; + struct vb2_queue vb_vidq; struct pardevice *pdev; struct parport *pport; struct mutex lock; + struct mutex queue_lock; int width, height; int bpp; int mode; @@ -558,7 +561,7 @@ static inline int qc_readbytes(struct qcam *q, char buffer[]) * n=2^(bit depth)-1. Ask me for more details if you don't understand * this. */ -static long qc_capture(struct qcam *q, char __user *buf, unsigned long len) +static long qc_capture(struct qcam *q, u8 *buf, unsigned long len) { int i, j, k, yield; int bytes; @@ -609,7 +612,7 @@ static long qc_capture(struct qcam *q, char __user *buf, unsigned long len) if (o < len) { u8 ch = invert - buffer[k]; got++; - put_user(ch << shift, buf + o); + buf[o] = ch << shift; } } pixels_read += bytes; @@ -639,6 +642,67 @@ static long qc_capture(struct qcam *q, char __user *buf, unsigned long len) return len; } +/* ------------------------------------------------------------------ + Videobuf operations + ------------------------------------------------------------------*/ +static int queue_setup(struct vb2_queue *vq, const struct v4l2_format *fmt, + unsigned int *nbuffers, unsigned int *nplanes, + unsigned int sizes[], void *alloc_ctxs[]) +{ + struct qcam *dev = vb2_get_drv_priv(vq); + + if (0 == *nbuffers) + *nbuffers = 3; + *nplanes = 1; + mutex_lock(&dev->lock); + if (fmt) + sizes[0] = fmt->fmt.pix.width * fmt->fmt.pix.height; + else + sizes[0] = (dev->width / dev->transfer_scale) * + (dev->height / dev->transfer_scale); + mutex_unlock(&dev->lock); + return 0; +} + +static void buffer_queue(struct vb2_buffer *vb) +{ + vb2_buffer_done(vb, VB2_BUF_STATE_DONE); +} + +static int buffer_finish(struct vb2_buffer *vb) +{ + struct qcam *qcam = vb2_get_drv_priv(vb->vb2_queue); + void *vbuf = vb2_plane_vaddr(vb, 0); + int size = vb->vb2_queue->plane_sizes[0]; + int len; + + mutex_lock(&qcam->lock); + parport_claim_or_block(qcam->pdev); + + qc_reset(qcam); + + /* Update the camera parameters if we need to */ + if (qcam->status & QC_PARAM_CHANGE) + qc_set(qcam); + + len = qc_capture(qcam, vbuf, size); + + parport_release(qcam->pdev); + mutex_unlock(&qcam->lock); + if (len != size) + vb->state = VB2_BUF_STATE_ERROR; + vb2_set_plane_payload(vb, 0, len); + return 0; +} + +static struct vb2_ops qcam_video_qops = { + .queue_setup = queue_setup, + .buf_queue = buffer_queue, + .buf_finish = buffer_finish, + .wait_prepare = vb2_ops_wait_prepare, + .wait_finish = vb2_ops_wait_finish, +}; + /* * Video4linux interfacing */ @@ -651,7 +715,8 @@ static int qcam_querycap(struct file *file, void *priv, strlcpy(vcap->driver, qcam->v4l2_dev.name, sizeof(vcap->driver)); strlcpy(vcap->card, "Connectix B&W Quickcam", sizeof(vcap->card)); strlcpy(vcap->bus_info, qcam->pport->name, sizeof(vcap->bus_info)); - vcap->device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_READWRITE; + vcap->device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_READWRITE | + V4L2_CAP_STREAMING; vcap->capabilities = vcap->device_caps | V4L2_CAP_DEVICE_CAPS; return 0; } @@ -731,6 +796,8 @@ static int qcam_s_fmt_vid_cap(struct file *file, void *fh, struct v4l2_format *f if (ret) return ret; + if (vb2_is_busy(&qcam->vb_vidq)) + return -EBUSY; qcam->width = 320; qcam->height = 240; if (pix->height == 60) @@ -744,12 +811,10 @@ static int qcam_s_fmt_vid_cap(struct file *file, void *fh, struct v4l2_format *f else qcam->bpp = 4; - mutex_lock(&qcam->lock); qc_setscanmode(qcam); /* We must update the camera before we grab. We could just have changed the grab size */ qcam->status |= QC_PARAM_CHANGE; - mutex_unlock(&qcam->lock); return 0; } @@ -794,41 +859,12 @@ static int qcam_enum_framesizes(struct file *file, void *fh, return 0; } -static ssize_t qcam_read(struct file *file, char __user *buf, - size_t count, loff_t *ppos) -{ - struct qcam *qcam = video_drvdata(file); - int len; - parport_claim_or_block(qcam->pdev); - - mutex_lock(&qcam->lock); - - qc_reset(qcam); - - /* Update the camera parameters if we need to */ - if (qcam->status & QC_PARAM_CHANGE) - qc_set(qcam); - - len = qc_capture(qcam, buf, count); - - mutex_unlock(&qcam->lock); - - parport_release(qcam->pdev); - return len; -} - -static unsigned int qcam_poll(struct file *filp, poll_table *wait) -{ - return v4l2_ctrl_poll(filp, wait) | POLLIN | POLLRDNORM; -} - static int qcam_s_ctrl(struct v4l2_ctrl *ctrl) { struct qcam *qcam = container_of(ctrl->handler, struct qcam, hdl); int ret = 0; - mutex_lock(&qcam->lock); switch (ctrl->id) { case V4L2_CID_BRIGHTNESS: qcam->brightness = ctrl->val; @@ -847,17 +883,17 @@ static int qcam_s_ctrl(struct v4l2_ctrl *ctrl) qc_setscanmode(qcam); qcam->status |= QC_PARAM_CHANGE; } - mutex_unlock(&qcam->lock); return ret; } static const struct v4l2_file_operations qcam_fops = { .owner = THIS_MODULE, .open = v4l2_fh_open, - .release = v4l2_fh_release, - .poll = qcam_poll, + .release = vb2_fop_release, + .poll = vb2_fop_poll, .unlocked_ioctl = video_ioctl2, - .read = qcam_read, + .read = vb2_fop_read, + .mmap = vb2_fop_mmap, }; static const struct v4l2_ioctl_ops qcam_ioctl_ops = { @@ -870,6 +906,14 @@ static const struct v4l2_ioctl_ops qcam_ioctl_ops = { .vidioc_g_fmt_vid_cap = qcam_g_fmt_vid_cap, .vidioc_s_fmt_vid_cap = qcam_s_fmt_vid_cap, .vidioc_try_fmt_vid_cap = qcam_try_fmt_vid_cap, + .vidioc_reqbufs = vb2_ioctl_reqbufs, + .vidioc_create_bufs = vb2_ioctl_create_bufs, + .vidioc_prepare_buf = vb2_ioctl_prepare_buf, + .vidioc_querybuf = vb2_ioctl_querybuf, + .vidioc_qbuf = vb2_ioctl_qbuf, + .vidioc_dqbuf = vb2_ioctl_dqbuf, + .vidioc_streamon = vb2_ioctl_streamon, + .vidioc_streamoff = vb2_ioctl_streamoff, .vidioc_log_status = v4l2_ctrl_log_status, .vidioc_subscribe_event = v4l2_ctrl_subscribe_event, .vidioc_unsubscribe_event = v4l2_event_unsubscribe, @@ -886,6 +930,8 @@ static struct qcam *qcam_init(struct parport *port) { struct qcam *qcam; struct v4l2_device *v4l2_dev; + struct vb2_queue *q; + int err; qcam = kzalloc(sizeof(struct qcam), GFP_KERNEL); if (qcam == NULL) @@ -909,31 +955,45 @@ static struct qcam *qcam_init(struct parport *port) V4L2_CID_GAMMA, 0, 255, 1, 105); if (qcam->hdl.error) { v4l2_err(v4l2_dev, "couldn't register controls\n"); - v4l2_ctrl_handler_free(&qcam->hdl); - kfree(qcam); - return NULL; + goto exit; + } + + mutex_init(&qcam->lock); + mutex_init(&qcam->queue_lock); + + /* initialize queue */ + q = &qcam->vb_vidq; + q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; + q->io_modes = VB2_MMAP | VB2_USERPTR | VB2_READ; + q->drv_priv = qcam; + q->ops = &qcam_video_qops; + q->mem_ops = &vb2_vmalloc_memops; + err = vb2_queue_init(q); + if (err < 0) { + v4l2_err(v4l2_dev, "couldn't init vb2_queue for %s.\n", port->name); + goto exit; } + qcam->vdev.queue = q; + qcam->vdev.queue->lock = &qcam->queue_lock; + qcam->pport = port; qcam->pdev = parport_register_device(port, v4l2_dev->name, NULL, NULL, NULL, 0, NULL); if (qcam->pdev == NULL) { v4l2_err(v4l2_dev, "couldn't register for %s.\n", port->name); - v4l2_ctrl_handler_free(&qcam->hdl); - kfree(qcam); - return NULL; + goto exit; } strlcpy(qcam->vdev.name, "Connectix QuickCam", sizeof(qcam->vdev.name)); qcam->vdev.v4l2_dev = v4l2_dev; qcam->vdev.ctrl_handler = &qcam->hdl; qcam->vdev.fops = &qcam_fops; + qcam->vdev.lock = &qcam->lock; qcam->vdev.ioctl_ops = &qcam_ioctl_ops; set_bit(V4L2_FL_USE_FH_PRIO, &qcam->vdev.flags); qcam->vdev.release = video_device_release_empty; video_set_drvdata(&qcam->vdev, qcam); - mutex_init(&qcam->lock); - qcam->port_mode = (QC_ANY | QC_NOTSET); qcam->width = 320; qcam->height = 240; @@ -947,6 +1007,11 @@ static struct qcam *qcam_init(struct parport *port) qcam->mode = -1; qcam->status = QC_PARAM_CHANGE; return qcam; + +exit: + v4l2_ctrl_handler_free(&qcam->hdl); + kfree(qcam); + return NULL; } static int qc_calibrate(struct qcam *q) |