V4L/DVB (4240): Various V4L control enhancements in pvrusb2

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

drivers/media/video/pvrusb2/pvrusb2-ctrl.c

@@ -214,6 +214,27 @@ int pvr2_ctrl_get_valname(struct pvr2_ctrl *cptr,int val,
 }
 
 
+/* Return V4L ID for this control or zero if none */
+int pvr2_ctrl_get_v4lid(struct pvr2_ctrl *cptr)
+{
+	if (!cptr) return 0;
+	return cptr->info->v4l_id;
+}
+
+
+unsigned int pvr2_ctrl_get_v4lflags(struct pvr2_ctrl *cptr)
+{
+	unsigned int flags = 0;
+
+	if (cptr->info->get_v4lflags) {
+		flags = cptr->info->get_v4lflags(cptr);
+	}
+
+
+	return flags;
+}
+
+
 /* Return true if control is writable */
 int pvr2_ctrl_is_writable(struct pvr2_ctrl *cptr)
 {

drivers/media/video/pvrusb2/pvrusb2-ctrl.h

@@ -71,6 +71,13 @@ int pvr2_ctrl_get_valname(struct pvr2_ctrl *,int,char *,unsigned int,
 /* Return true if control is writable */
 int pvr2_ctrl_is_writable(struct pvr2_ctrl *);
 
+/* Return V4L flags value for control (or zero if there is no v4l control
+   actually under this control) */
+unsigned int pvr2_ctrl_get_v4lflags(struct pvr2_ctrl *);
+
+/* Return V4L ID for this control or zero if none */
+int pvr2_ctrl_get_v4lid(struct pvr2_ctrl *);
+
 /* Return true if control has custom symbolic representation */
 int pvr2_ctrl_has_custom_symbols(struct pvr2_ctrl *);
 

drivers/media/video/pvrusb2/pvrusb2-hdw-internal.h

@@ -94,6 +94,7 @@ typedef int (*pvr2_ctlf_val_to_sym)(struct pvr2_ctrl *,int msk,int val,
 typedef int (*pvr2_ctlf_sym_to_val)(struct pvr2_ctrl *,
 				    const char *,unsigned int,
 				    int *mskp,int *valp);
+typedef unsigned int (*pvr2_ctlf_get_v4lflags)(struct pvr2_ctrl *);
 
 /* This structure describes a specific control.  A table of these is set up
    in pvrusb2-hdw.c. */
@@ -111,6 +112,7 @@ struct pvr2_ctl_info {
 	pvr2_ctlf_sym_to_val sym_to_val;    /* Custom convert symbol->value */
 	pvr2_ctlf_is_dirty is_dirty;        /* Return true if dirty */
 	pvr2_ctlf_clear_dirty clear_dirty;  /* Clear dirty state */
+	pvr2_ctlf_get_v4lflags get_v4lflags;/* Retrieve v4l flags */
 
 	/* Control's type (int, enum, bitmask) */
 	enum pvr2_ctl_type type;

drivers/media/video/pvrusb2/pvrusb2-hdw.c

@@ -1988,7 +1988,7 @@ struct pvr2_ctrl *pvr2_hdw_get_ctrl_by_id(struct pvr2_hdw *hdw,
 }
 
 
-/* Given an ID, retrieve the control structure associated with it. */
+/* Given a V4L ID, retrieve the control structure associated with it. */
 struct pvr2_ctrl *pvr2_hdw_get_ctrl_v4l(struct pvr2_hdw *hdw,unsigned int ctl_id)
 {
 	struct pvr2_ctrl *cptr;
@@ -2005,6 +2005,30 @@ struct pvr2_ctrl *pvr2_hdw_get_ctrl_v4l(struct pvr2_hdw *hdw,unsigned int ctl_id
 }
 
 
+/* Given a V4L ID for its immediate predecessor, retrieve the control
+   structure associated with it. */
+struct pvr2_ctrl *pvr2_hdw_get_ctrl_nextv4l(struct pvr2_hdw *hdw,
+					    unsigned int ctl_id)
+{
+	struct pvr2_ctrl *cptr,*cp2;
+	unsigned int idx;
+	int i;
+
+	/* This could be made a lot more efficient, but for now... */
+	cp2 = 0;
+	for (idx = 0; idx < hdw->control_cnt; idx++) {
+		cptr = hdw->controls + idx;
+		i = cptr->info->v4l_id;
+		if (!i) continue;
+		if (i <= ctl_id) continue;
+		if (cp2 && (cp2->info->v4l_id < i)) continue;
+		cp2 = cptr;
+	}
+	return cp2;
+	return 0;
+}
+
+
 static const char *get_ctrl_typename(enum pvr2_ctl_type tp)
 {
 	switch (tp) {

drivers/media/video/pvrusb2/pvrusb2-hdw.h

@@ -153,6 +153,10 @@ struct pvr2_ctrl *pvr2_hdw_get_ctrl_by_id(struct pvr2_hdw *,unsigned int);
 /* Retrieve a control handle given its V4L ID (if any) */
 struct pvr2_ctrl *pvr2_hdw_get_ctrl_v4l(struct pvr2_hdw *,unsigned int ctl_id);
 
+/* Retrieve a control handle given its immediate predecessor V4L ID (if any) */
+struct pvr2_ctrl *pvr2_hdw_get_ctrl_nextv4l(struct pvr2_hdw *,
+					    unsigned int ctl_id);
+
 /* Commit all control changes made up to this point */
 int pvr2_hdw_commit_ctl(struct pvr2_hdw *);
 

drivers/media/video/pvrusb2/pvrusb2-v4l2.c

@@ -520,12 +520,19 @@ static int pvr2_v4l2_do_ioctl(struct inode *inode, struct file *file,
 		ret = 0;
 		cptr = pvr2_hdw_get_ctrl_v4l(hdw,vc->id);
 		if (!cptr) {
+			pvr2_trace(PVR2_TRACE_ERROR_LEGS,
+				   "QUERYCTRL id=0x%x not implemented here",
+				   vc->id);
 			ret = -EINVAL;
 			break;
 		}
 
-		strlcpy(vc->name,pvr2_ctrl_get_name(cptr),sizeof(vc->name));
-		vc->flags = 0;
+		pvr2_trace(PVR2_TRACE_V4LIOCTL,
+			   "QUERYCTRL id=0x%x mapping name=%s (%s)",
+			   vc->id,pvr2_ctrl_get_name(cptr),
+			   pvr2_ctrl_get_desc(cptr));
+		strlcpy(vc->name,pvr2_ctrl_get_desc(cptr),sizeof(vc->name));
+		vc->flags = pvr2_ctrl_get_v4lflags(cptr);
 		vc->default_value = pvr2_ctrl_get_def(cptr);
 		switch (pvr2_ctrl_get_type(cptr)) {
 		case pvr2_ctl_enum:
@@ -547,6 +554,9 @@ static int pvr2_v4l2_do_ioctl(struct inode *inode, struct file *file,
 			vc->step = 1;
 			break;
 		default:
+			pvr2_trace(PVR2_TRACE_ERROR_LEGS,
+				   "QUERYCTRL id=0x%x name=%s not mappable",
+				   vc->id,pvr2_ctrl_get_name(cptr));
 			ret = -EINVAL;
 			break;
 		}