#include "pvrusb2-v4l2.h"
#include "pvrusb2-ioread.h"
#include <linux/videodev2.h>
+#include <media/v4l2-dev.h>
#include <media/v4l2-common.h>
struct pvr2_v4l2_dev;
struct pvr2_v4l2_fh;
struct pvr2_v4l2;
-/* V4L no longer provide the ability to set / get a private context pointer
- (i.e. video_get_drvdata / video_set_drvdata), which means we have to
- concoct our own context locating mechanism. Supposedly this is intended
- to simplify driver implementation. It's not clear to me how that can
- possibly be true. Our solution here is to maintain a lookup table of
- our context instances, indexed by the minor device number of the V4L
- device. See pvr2_v4l2_open() for some implications of this approach. */
-static struct pvr2_v4l2_dev *devices[256];
-static DEFINE_MUTEX(device_lock);
-
struct pvr2_v4l2_dev {
+ struct video_device devbase; /* MUST be first! */
struct pvr2_v4l2 *v4lp;
- struct video_device *vdev;
struct pvr2_context_stream *stream;
- int ctxt_idx;
enum pvr2_config config;
};
struct v4l2_prio_state prio;
/* streams */
- struct pvr2_v4l2_dev video_dev;
+ struct pvr2_v4l2_dev *vdev;
};
static int video_nr[PVR_NUM] = {[0 ... PVR_NUM-1] = -1};
module_param_array(video_nr, int, NULL, 0444);
MODULE_PARM_DESC(video_nr, "Offset for device's minor");
-struct v4l2_capability pvr_capability ={
+static struct v4l2_capability pvr_capability ={
.driver = "pvrusb2",
.card = "Hauppauge WinTV pvr-usb2",
.bus_info = "usb",
}
};
-struct v4l2_fmtdesc pvr_fmtdesc [] = {
+static struct v4l2_fmtdesc pvr_fmtdesc [] = {
{
.index = 0,
.type = V4L2_BUF_TYPE_VIDEO_CAPTURE,
#define PVR_FORMAT_PIX 0
#define PVR_FORMAT_VBI 1
-struct v4l2_format pvr_format [] = {
+static struct v4l2_format pvr_format [] = {
[PVR_FORMAT_PIX] = {
.type = V4L2_BUF_TYPE_VIDEO_CAPTURE,
.fmt = {
ret = 0;
switch(vf->type) {
case V4L2_BUF_TYPE_VIDEO_CAPTURE: {
+ int lmin,lmax;
+ struct pvr2_ctrl *hcp,*vcp;
int h = vf->fmt.pix.height;
int w = vf->fmt.pix.width;
-
- if (h < 200) {
- h = 200;
- } else if (h > 625) {
- h = 625;
+ hcp = pvr2_hdw_get_ctrl_by_id(hdw,PVR2_CID_HRES);
+ vcp = pvr2_hdw_get_ctrl_by_id(hdw,PVR2_CID_VRES);
+
+ lmin = pvr2_ctrl_get_min(hcp);
+ lmax = pvr2_ctrl_get_max(hcp);
+ if (w < lmin) {
+ w = lmin;
+ } else if (w > lmax) {
+ w = lmax;
}
- if (w < 320) {
- w = 320;
- } else if (w > 720) {
- w = 720;
+ lmin = pvr2_ctrl_get_min(vcp);
+ lmax = pvr2_ctrl_get_max(vcp);
+ if (h < lmin) {
+ h = lmin;
+ } else if (h > lmax) {
+ h = lmax;
}
memcpy(vf, &pvr_format[PVR_FORMAT_PIX],
vf->fmt.pix.height = h;
if (cmd == VIDIOC_S_FMT) {
- pvr2_ctrl_set_value(
- pvr2_hdw_get_ctrl_by_id(hdw,
- PVR2_CID_HRES),
- vf->fmt.pix.width);
- pvr2_ctrl_set_value(
- pvr2_hdw_get_ctrl_by_id(hdw,
- PVR2_CID_VRES),
- vf->fmt.pix.height);
+ pvr2_ctrl_set_value(hcp,vf->fmt.pix.width);
+ pvr2_ctrl_set_value(vcp,vf->fmt.pix.height);
}
} break;
case V4L2_BUF_TYPE_VBI_CAPTURE:
ret = 0;
break;
}
+#ifdef CONFIG_VIDEO_ADV_DEBUG
+ case VIDIOC_INT_G_REGISTER:
+ case VIDIOC_INT_S_REGISTER:
+ {
+ u32 val;
+ struct v4l2_register *req = (struct v4l2_register *)arg;
+ if (cmd == VIDIOC_INT_S_REGISTER) val = req->val;
+ ret = pvr2_hdw_register_access(
+ hdw,req->i2c_id,req->reg,
+ cmd == VIDIOC_INT_S_REGISTER,&val);
+ if (cmd == VIDIOC_INT_G_REGISTER) req->val = val;
+ break;
+ }
+#endif
default :
ret = v4l_compat_translate_ioctl(inode,file,cmd,
static void pvr2_v4l2_dev_destroy(struct pvr2_v4l2_dev *dip)
{
- pvr2_trace(PVR2_TRACE_INIT,
- "unregistering device video%d [%s]",
- dip->vdev->minor,pvr2_config_get_name(dip->config));
- if (dip->ctxt_idx >= 0) {
- mutex_lock(&device_lock);
- devices[dip->ctxt_idx] = NULL;
- dip->ctxt_idx = -1;
- mutex_unlock(&device_lock);
- }
- video_unregister_device(dip->vdev);
+ printk(KERN_INFO "pvrusb2: unregistering device video%d [%s]\n",
+ dip->devbase.minor,pvr2_config_get_name(dip->config));
+
+ /* Paranoia */
+ dip->v4lp = 0;
+ dip->stream = 0;
+
+ /* Actual deallocation happens later when all internal references
+ are gone. */
+ video_unregister_device(&dip->devbase);
}
static void pvr2_v4l2_destroy_no_lock(struct pvr2_v4l2 *vp)
{
pvr2_hdw_v4l_store_minor_number(vp->channel.mc_head->hdw,-1);
- pvr2_v4l2_dev_destroy(&vp->video_dev);
+ pvr2_v4l2_dev_destroy(vp->vdev);
pvr2_trace(PVR2_TRACE_STRUCT,"Destroying pvr2_v4l2 id=%p",vp);
pvr2_channel_done(&vp->channel);
}
-void pvr2_v4l2_internal_check(struct pvr2_channel *chp)
+static void pvr2_video_device_release(struct video_device *vdev)
+{
+ struct pvr2_v4l2_dev *dev;
+ dev = container_of(vdev,struct pvr2_v4l2_dev,devbase);
+ kfree(dev);
+}
+
+
+static void pvr2_v4l2_internal_check(struct pvr2_channel *chp)
{
struct pvr2_v4l2 *vp;
vp = container_of(chp,struct pvr2_v4l2,channel);
}
-int pvr2_v4l2_ioctl(struct inode *inode, struct file *file,
- unsigned int cmd, unsigned long arg)
+static int pvr2_v4l2_ioctl(struct inode *inode, struct file *file,
+ unsigned int cmd, unsigned long arg)
{
/* Temporary hack : use ivtv api until a v4l2 one is available. */
}
-int pvr2_v4l2_release(struct inode *inode, struct file *file)
+static int pvr2_v4l2_release(struct inode *inode, struct file *file)
{
struct pvr2_v4l2_fh *fhp = file->private_data;
struct pvr2_v4l2 *vp = fhp->vhead;
hdw = fhp->channel.mc_head->hdw;
pvr2_hdw_set_streaming(hdw,0);
sp = pvr2_ioread_get_stream(fhp->rhp);
- if (sp) pvr2_stream_set_callback(sp,0,0);
+ if (sp) pvr2_stream_set_callback(sp,NULL,NULL);
pvr2_ioread_destroy(fhp->rhp);
- fhp->rhp = 0;
+ fhp->rhp = NULL;
}
v4l2_prio_close(&vp->prio, &fhp->prio);
file->private_data = NULL;
} else {
vp->vfirst = fhp->vnext;
}
- fhp->vnext = 0;
- fhp->vprev = 0;
- fhp->vhead = 0;
+ fhp->vnext = NULL;
+ fhp->vprev = NULL;
+ fhp->vhead = NULL;
pvr2_channel_done(&fhp->channel);
pvr2_trace(PVR2_TRACE_STRUCT,
"Destroying pvr_v4l2_fh id=%p",fhp);
}
-int pvr2_v4l2_open(struct inode *inode, struct file *file)
+static int pvr2_v4l2_open(struct inode *inode, struct file *file)
{
- struct pvr2_v4l2_dev *dip = 0; /* Our own context pointer */
+ struct pvr2_v4l2_dev *dip; /* Our own context pointer */
struct pvr2_v4l2_fh *fhp;
struct pvr2_v4l2 *vp;
struct pvr2_hdw *hdw;
- mutex_lock(&device_lock);
- /* MCI 7-Jun-2006 Even though we're just doing what amounts to an
- atomic read of the device mapping array here, we still need the
- mutex. The problem is that there is a tiny race possible when
- we register the device. We can't update the device mapping
- array until after the device has been registered, owing to the
- fact that we can't know the minor device number until after the
- registration succeeds. And if another thread tries to open the
- device in the window of time after registration but before the
- map is updated, then it will get back an erroneous null pointer
- and the open will result in a spurious failure. The only way to
- prevent that is to (a) be inside the mutex here before we access
- the array, and (b) cover the entire registration process later
- on with this same mutex. Thus if we get inside the mutex here,
- then we can be assured that the registration process actually
- completed correctly. This is an unhappy complication from the
- use of global data in a driver that lives in a preemptible
- environment. It sure would be nice if the video device itself
- had a means for storing and retrieving a local context pointer.
- Oh wait. It did. But now it's gone. Silly me. */
- {
- unsigned int midx = iminor(file->f_dentry->d_inode);
- if (midx < sizeof(devices)/sizeof(devices[0])) {
- dip = devices[midx];
- }
- }
- mutex_unlock(&device_lock);
-
- if (!dip) return -ENODEV; /* Should be impossible but I'm paranoid */
+ dip = container_of(video_devdata(file),struct pvr2_v4l2_dev,devbase);
vp = dip->v4lp;
hdw = vp->channel.hdw;
pvr2_context_enter(vp->channel.mc_head); do {
pvr2_trace(PVR2_TRACE_STRUCT,"Creating pvr_v4l2_fh id=%p",fhp);
pvr2_channel_init(&fhp->channel,vp->channel.mc_head);
- fhp->vnext = 0;
+ fhp->vnext = NULL;
fhp->vprev = vp->vlast;
if (vp->vlast) {
vp->vlast->vnext = fhp;
fh->rhp = pvr2_channel_create_mpeg_stream(fh->dev_info->stream);
if (!fh->rhp) {
- pvr2_channel_claim_stream(&fh->channel,0);
+ pvr2_channel_claim_stream(&fh->channel,NULL);
return -ENOMEM;
}
return;
}
- dip->vdev = video_device_alloc();
- if (!dip->vdev) {
- err("Alloc of pvrusb2 v4l video device failed");
- return;
- }
-
- memcpy(dip->vdev,&vdev_template,sizeof(vdev_template));
- dip->vdev->release = video_device_release;
- mutex_lock(&device_lock);
+ memcpy(&dip->devbase,&vdev_template,sizeof(vdev_template));
+ dip->devbase.release = pvr2_video_device_release;
mindevnum = -1;
unit_number = pvr2_hdw_get_unit_number(vp->channel.mc_head->hdw);
if ((unit_number >= 0) && (unit_number < PVR_NUM)) {
mindevnum = video_nr[unit_number];
}
- if ((video_register_device(dip->vdev, v4l_type, mindevnum) < 0) &&
- (video_register_device(dip->vdev, v4l_type, -1) < 0)) {
+ if ((video_register_device(&dip->devbase, v4l_type, mindevnum) < 0) &&
+ (video_register_device(&dip->devbase, v4l_type, -1) < 0)) {
err("Failed to register pvrusb2 v4l video device");
} else {
- pvr2_trace(PVR2_TRACE_INIT,
- "registered device video%d [%s]",
- dip->vdev->minor,pvr2_config_get_name(dip->config));
- }
-
- if ((dip->vdev->minor < sizeof(devices)/sizeof(devices[0])) &&
- (devices[dip->vdev->minor] == NULL)) {
- dip->ctxt_idx = dip->vdev->minor;
- devices[dip->ctxt_idx] = dip;
+ printk(KERN_INFO "pvrusb2: registered device video%d [%s]\n",
+ dip->devbase.minor,pvr2_config_get_name(dip->config));
}
- mutex_unlock(&device_lock);
pvr2_hdw_v4l_store_minor_number(vp->channel.mc_head->hdw,
- dip->vdev->minor);
+ dip->devbase.minor);
}
vp = kmalloc(sizeof(*vp),GFP_KERNEL);
if (!vp) return vp;
memset(vp,0,sizeof(*vp));
- vp->video_dev.ctxt_idx = -1;
+ vp->vdev = kmalloc(sizeof(*vp->vdev),GFP_KERNEL);
+ if (!vp->vdev) {
+ kfree(vp);
+ return 0;
+ }
+ memset(vp->vdev,0,sizeof(*vp->vdev));
pvr2_channel_init(&vp->channel,mnp);
pvr2_trace(PVR2_TRACE_STRUCT,"Creating pvr2_v4l2 id=%p",vp);
vp->channel.check_func = pvr2_v4l2_internal_check;
/* register streams */
- pvr2_v4l2_dev_init(&vp->video_dev,vp,pvr2_config_mpeg);
-
+ pvr2_v4l2_dev_init(vp->vdev,vp,pvr2_config_mpeg);
return vp;
}
projects / linux-2.6 / blobdiff