V4L/DVB (5057): Pvrusb2: Stream configuration cleanups

Clean up and tighten logic involving stream configuration.  This
mainly involves changes to pvrusb2-v4l2.c, where we better clarify how
we use the stream configuration enum and implement a cleaner means to
control streaming for a given device node.

Signed-off-by: Mike Isely <isely@pobox.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

diff --git a/drivers/media/video/pvrusb2/pvrusb2-encoder.c b/drivers/media/video/pvrusb2/pvrusb2-encoder.c
index d094cac..3ec8093 100644 (file)
--- a/drivers/media/video/pvrusb2/pvrusb2-encoder.c
+++ b/drivers/media/video/pvrusb2/pvrusb2-encoder.c
@@ -363,15 +363,19 @@ int pvr2_encoder_start(struct pvr2_hdw *hdw)
        pvr2_encoder_vcmd(hdw,CX2341X_ENC_MUTE_VIDEO,1,
                          hdw->input_val == PVR2_CVAL_INPUT_RADIO ? 1 : 0);
 
-       if (hdw->config == pvr2_config_vbi) {
+       switch (hdw->config) {
+       case pvr2_config_vbi:
                status = pvr2_encoder_vcmd(hdw,CX2341X_ENC_START_CAPTURE,2,
                                           0x01,0x14);
-       } else if (hdw->config == pvr2_config_mpeg) {
+               break;
+       case pvr2_config_mpeg:
                status = pvr2_encoder_vcmd(hdw,CX2341X_ENC_START_CAPTURE,2,
                                           0,0x13);
-       } else {
+               break;
+       default: /* Unhandled cases for now */
                status = pvr2_encoder_vcmd(hdw,CX2341X_ENC_START_CAPTURE,2,
                                           0,0x13);
+               break;
        }
        if (!status) {
                hdw->subsys_enabled_mask |= (1<<PVR2_SUBSYS_B_ENC_RUN);
@@ -386,15 +390,19 @@ int pvr2_encoder_stop(struct pvr2_hdw *hdw)
        /* mask all interrupts */
        pvr2_write_register(hdw, 0x0048, 0xffffffff);
 
-       if (hdw->config == pvr2_config_vbi) {
+       switch (hdw->config) {
+       case pvr2_config_vbi:
                status = pvr2_encoder_vcmd(hdw,CX2341X_ENC_STOP_CAPTURE,3,
                                           0x01,0x01,0x14);
-       } else if (hdw->config == pvr2_config_mpeg) {
+               break;
+       case pvr2_config_mpeg:
                status = pvr2_encoder_vcmd(hdw,CX2341X_ENC_STOP_CAPTURE,3,
                                           0x01,0,0x13);
-       } else {
+               break;
+       default: /* Unhandled cases for now */
                status = pvr2_encoder_vcmd(hdw,CX2341X_ENC_STOP_CAPTURE,3,
                                           0x01,0,0x13);
+               break;
        }
 
        /* change some GPIO data */

diff --git a/drivers/media/video/pvrusb2/pvrusb2-hdw.c b/drivers/media/video/pvrusb2/pvrusb2-hdw.c
index aa76302..2de5951 100644 (file)
--- a/drivers/media/video/pvrusb2/pvrusb2-hdw.c
+++ b/drivers/media/video/pvrusb2/pvrusb2-hdw.c
@@ -957,7 +957,8 @@ const char *pvr2_config_get_name(enum pvr2_config cfg)
        case pvr2_config_empty: return "empty";
        case pvr2_config_mpeg: return "mpeg";
        case pvr2_config_vbi: return "vbi";
-       case pvr2_config_radio: return "radio";
+       case pvr2_config_pcm: return "pcm";
+       case pvr2_config_rawvideo: return "raw video";
        }
        return "<unknown>";
 }

diff --git a/drivers/media/video/pvrusb2/pvrusb2-hdw.h b/drivers/media/video/pvrusb2/pvrusb2-hdw.h
index 19af4d6..d803f24 100644 (file)
--- a/drivers/media/video/pvrusb2/pvrusb2-hdw.h
+++ b/drivers/media/video/pvrusb2/pvrusb2-hdw.h
@@ -72,10 +72,11 @@
        PVR2_SUBSYS_RUN_ALL )
 
 enum pvr2_config {
-       pvr2_config_empty,
-       pvr2_config_mpeg,
-       pvr2_config_vbi,
-       pvr2_config_radio,
+       pvr2_config_empty,    /* No configuration */
+       pvr2_config_mpeg,     /* Encoded / compressed video */
+       pvr2_config_vbi,      /* Standard vbi info */
+       pvr2_config_pcm,      /* Audio raw pcm stream */
+       pvr2_config_rawvideo, /* Video raw frames */
 };
 
 enum pvr2_v4l_type {

diff --git a/drivers/media/video/pvrusb2/pvrusb2-v4l2.c b/drivers/media/video/pvrusb2/pvrusb2-v4l2.c
index cc3260f..7a8b34d 100644 (file)
--- a/drivers/media/video/pvrusb2/pvrusb2-v4l2.c
+++ b/drivers/media/video/pvrusb2/pvrusb2-v4l2.c
@@ -40,7 +40,10 @@ struct pvr2_v4l2_dev {
        struct video_device devbase; /* MUST be first! */
        struct pvr2_v4l2 *v4lp;
        struct pvr2_context_stream *stream;
-       enum pvr2_config config;
+       /* Information about this device: */
+       enum pvr2_config config; /* Expected stream format */
+       int v4l_type; /* V4L defined type for this device node */
+       enum pvr2_v4l_type minor_type; /* pvr2-understood minor device type */
 };
 
 struct pvr2_v4l2_fh {
@@ -163,6 +166,18 @@ static struct v4l2_format pvr_format [] = {
        }
 };
 
+
+static const char *get_v4l_name(int v4l_type)
+{
+       switch (v4l_type) {
+       case VFL_TYPE_GRABBER: return "video";
+       case VFL_TYPE_RADIO: return "radio";
+       case VFL_TYPE_VBI: return "vbi";
+       default: return "?";
+       }
+}
+
+
 /*
  * pvr_ioctl()
  *
@@ -521,6 +536,13 @@ static int pvr2_v4l2_do_ioctl(struct inode *inode, struct file *file,
 
        case VIDIOC_STREAMON:
        {
+               if (!fh->dev_info->stream) {
+                       /* No stream defined for this node.  This means
+                          that we're not currently allowed to stream from
+                          this node. */
+                       ret = -EPERM;
+                       break;
+               }
                ret = pvr2_hdw_set_stream_type(hdw,dev_info->config);
                if (ret < 0) return ret;
                ret = pvr2_hdw_set_streaming(hdw,!0);
@@ -529,6 +551,13 @@ static int pvr2_v4l2_do_ioctl(struct inode *inode, struct file *file,
 
        case VIDIOC_STREAMOFF:
        {
+               if (!fh->dev_info->stream) {
+                       /* No stream defined for this node.  This means
+                          that we're not currently allowed to stream from
+                          this node. */
+                       ret = -EPERM;
+                       break;
+               }
                ret = pvr2_hdw_set_streaming(hdw,0);
                break;
        }
@@ -734,26 +763,12 @@ static int pvr2_v4l2_do_ioctl(struct inode *inode, struct file *file,
 
 static void pvr2_v4l2_dev_destroy(struct pvr2_v4l2_dev *dip)
 {
-       enum pvr2_config cfg = dip->config;
        int minor_id = dip->devbase.minor;
-       enum pvr2_v4l_type pvt;
        struct pvr2_hdw *hdw = dip->v4lp->channel.mc_head->hdw;
+       enum pvr2_config cfg = dip->config;
+       int v4l_type = dip->v4l_type;
 
-       switch (cfg) {
-       case pvr2_config_mpeg:
-               pvt = pvr2_v4l_type_video;
-               break;
-       case pvr2_config_vbi:
-               pvt = pvr2_v4l_type_vbi;
-               break;
-       case pvr2_config_radio:
-               pvt = pvr2_v4l_type_radio;
-               break;
-       default: /* paranoia */
-               pvt = pvr2_v4l_type_video;
-               break;
-       }
-       pvr2_hdw_v4l_store_minor_number(hdw,pvt,-1);
+       pvr2_hdw_v4l_store_minor_number(hdw,dip->minor_type,-1);
 
        /* Paranoia */
        dip->v4lp = NULL;
@@ -763,25 +778,9 @@ static void pvr2_v4l2_dev_destroy(struct pvr2_v4l2_dev *dip)
           are gone. */
        video_unregister_device(&dip->devbase);
 
-       switch (cfg) {
-       case pvr2_config_mpeg:
-               printk(KERN_INFO "pvrusb2: unregistered device video%d [%s]\n",
-                      minor_id & 0x1f,
-                      pvr2_config_get_name(cfg));
-               break;
-       case pvr2_config_radio:
-               printk(KERN_INFO "pvrusb2: unregistered device radio%d [%s]\n",
-                      minor_id & 0x1f,
-                      pvr2_config_get_name(cfg));
-               break;
-       case pvr2_config_vbi:
-               printk(KERN_INFO "pvrusb2: unregistered device vbi%d [%s]\n",
-                      minor_id & 0x1f,
-                      pvr2_config_get_name(cfg));
-               break;
-       default:
-               break;
-       }
+       printk(KERN_INFO "pvrusb2: unregistered device %s%u [%s]\n",
+              get_v4l_name(v4l_type),minor_id & 0x1f,
+              pvr2_config_get_name(cfg));
 
 }
 
@@ -852,17 +851,6 @@ static int pvr2_v4l2_release(struct inode *inode, struct file *file)
                fhp->rhp = NULL;
        }
 
-       if (fhp->dev_info->config == pvr2_config_radio) {
-               int ret;
-               struct pvr2_hdw *hdw;
-               hdw = fhp->channel.mc_head->hdw;
-               if ((ret = pvr2_ctrl_set_value(
-                       pvr2_hdw_get_ctrl_by_id(hdw,PVR2_CID_INPUT),
-                       PVR2_CVAL_INPUT_TV))) {
-                       return ret;
-               }
-       }
-
        v4l2_prio_close(&vp->prio, &fhp->prio);
        file->private_data = NULL;
 
@@ -929,7 +917,7 @@ static int pvr2_v4l2_open(struct inode *inode, struct file *file)
                   So execute that here.  Note that you can get the
                   IDENTICAL effect merely by opening the normal video
                   device and setting the input appropriately. */
-               if (dip->config == pvr2_config_radio) {
+               if (dip->v4l_type == VFL_TYPE_RADIO) {
                        pvr2_ctrl_set_value(
                                pvr2_hdw_get_ctrl_by_id(hdw,PVR2_CID_INPUT),
                                PVR2_CVAL_INPUT_RADIO);
@@ -968,6 +956,12 @@ static int pvr2_v4l2_iosetup(struct pvr2_v4l2_fh *fh)
        struct pvr2_hdw *hdw;
        if (fh->rhp) return 0;
 
+       if (!fh->dev_info->stream) {
+               /* No stream defined for this node.  This means that we're
+                  not currently allowed to stream from this node. */
+               return -EPERM;
+       }
+
        /* First read() attempt.  Try to claim the stream and start
           it... */
        if ((ret = pvr2_channel_claim_stream(&fh->channel,
@@ -1032,12 +1026,6 @@ static ssize_t pvr2_v4l2_read(struct file *file,
                return tcnt;
        }
 
-       if (fh->dev_info->config == pvr2_config_radio) {
-               /* Radio device nodes on this device
-                  cannot be read or written. */
-               return -EPERM;
-       }
-
        if (!fh->rhp) {
                ret = pvr2_v4l2_iosetup(fh);
                if (ret) {
@@ -1072,12 +1060,6 @@ static unsigned int pvr2_v4l2_poll(struct file *file, poll_table *wait)
                return mask;
        }
 
-       if (fh->dev_info->config == pvr2_config_radio) {
-               /* Radio device nodes on this device
-                  cannot be read or written. */
-               return -EPERM;
-       }
-
        if (!fh->rhp) {
                ret = pvr2_v4l2_iosetup(fh);
                if (ret) return POLLERR;
@@ -1119,29 +1101,31 @@ static struct video_device vdev_template = {
 
 static void pvr2_v4l2_dev_init(struct pvr2_v4l2_dev *dip,
                               struct pvr2_v4l2 *vp,
-                              enum pvr2_config cfg)
+                              int v4l_type)
 {
        int mindevnum;
        int unit_number;
-       int v4l_type;
-       enum pvr2_v4l_type pvt;
+       int *nr_ptr = 0;
        dip->v4lp = vp;
-       dip->config = cfg;
 
 
-       switch (dip->config) {
-       case pvr2_config_mpeg:
-               v4l_type = VFL_TYPE_GRABBER;
-               pvt = pvr2_v4l_type_video;
+       dip->v4l_type = v4l_type;
+       switch (v4l_type) {
+       case VFL_TYPE_GRABBER:
                dip->stream = &vp->channel.mc_head->video_stream;
+               dip->config = pvr2_config_mpeg;
+               dip->minor_type = pvr2_v4l_type_video;
+               nr_ptr = video_nr;
                break;
-       case pvr2_config_vbi:
-               v4l_type = VFL_TYPE_VBI;
-               pvt = pvr2_v4l_type_vbi;
+       case VFL_TYPE_VBI:
+               dip->config = pvr2_config_vbi;
+               dip->minor_type = pvr2_v4l_type_vbi;
+               nr_ptr = vbi_nr;
                break;
-       case pvr2_config_radio:
-               v4l_type = VFL_TYPE_RADIO;
-               pvt = pvr2_v4l_type_radio;
+       case VFL_TYPE_RADIO:
+               dip->config = pvr2_config_pcm;
+               dip->minor_type = pvr2_v4l_type_radio;
+               nr_ptr = radio_nr;
                break;
        default:
                /* Bail out (this should be impossible) */
@@ -1151,7 +1135,7 @@ static void pvr2_v4l2_dev_init(struct pvr2_v4l2_dev *dip,
        }
 
        /* radio device doesn 't need its own stream */
-       if (!dip->stream && dip->config != pvr2_config_radio) {
+       if (!dip->stream && dip->v4l_type == VFL_TYPE_GRABBER) {
                err("Failed to set up pvrusb2 v4l dev"
                    " due to missing stream instance");
                return;
@@ -1162,46 +1146,22 @@ static void pvr2_v4l2_dev_init(struct pvr2_v4l2_dev *dip,
 
        mindevnum = -1;
        unit_number = pvr2_hdw_get_unit_number(vp->channel.mc_head->hdw);
-       if ((unit_number >= 0) && (unit_number < PVR_NUM)) {
-               switch (v4l_type) {
-               case VFL_TYPE_VBI:
-                       mindevnum = vbi_nr[unit_number];
-                       break;
-               case VFL_TYPE_RADIO:
-                       mindevnum = radio_nr[unit_number];
-                       break;
-               case VFL_TYPE_GRABBER:
-               default:
-                       mindevnum = video_nr[unit_number];
-                       break;
-               }
+       if (nr_ptr && (unit_number >= 0) && (unit_number < PVR_NUM)) {
+               mindevnum = nr_ptr[unit_number];
        }
-       if ((video_register_device(&dip->devbase, v4l_type, mindevnum) < 0) &&
-           (video_register_device(&dip->devbase, v4l_type, -1) < 0)) {
+       if ((video_register_device(&dip->devbase,
+                                  dip->v4l_type, mindevnum) < 0) &&
+           (video_register_device(&dip->devbase,
+                                  dip->v4l_type, -1) < 0)) {
                err("Failed to register pvrusb2 v4l device");
        }
-       switch (dip->config) {
-       case pvr2_config_mpeg:
-               printk(KERN_INFO "pvrusb2: registered device video%d [%s]\n",
-                      dip->devbase.minor & 0x1f,
-                      pvr2_config_get_name(dip->config));
-               break;
-       case pvr2_config_radio:
-               printk(KERN_INFO "pvrusb2: registered device radio%d [%s]\n",
-                      dip->devbase.minor & 0x1f,
-                      pvr2_config_get_name(dip->config));
-               break;
-       case pvr2_config_vbi:
-               printk(KERN_INFO "pvrusb2: registered device vbi%d [%s]\n",
-                      dip->devbase.minor & 0x1f,
-                      pvr2_config_get_name(dip->config));
-               break;
-       default:
-               break;
-       }
+
+       printk(KERN_INFO "pvrusb2: registered device %s%u [%s]\n",
+              get_v4l_name(dip->v4l_type),dip->devbase.minor & 0x1f,
+              pvr2_config_get_name(dip->config));
 
        pvr2_hdw_v4l_store_minor_number(vp->channel.mc_head->hdw,
-                                       pvt,dip->devbase.minor);
+                                       dip->minor_type,dip->devbase.minor);
 }
 
 
@@ -1228,8 +1188,8 @@ struct pvr2_v4l2 *pvr2_v4l2_create(struct pvr2_context *mnp)
        vp->channel.check_func = pvr2_v4l2_internal_check;
 
        /* register streams */
-       pvr2_v4l2_dev_init(vp->dev_video,vp,pvr2_config_mpeg);
-       pvr2_v4l2_dev_init(vp->dev_radio,vp,pvr2_config_radio);
+       pvr2_v4l2_dev_init(vp->dev_video,vp,VFL_TYPE_GRABBER);
+       pvr2_v4l2_dev_init(vp->dev_radio,vp,VFL_TYPE_RADIO);
 
        return vp;
 }