1 files changed, 811 insertions, 0 deletions

diff --git a/drivers/media/usb/pvrusb2/pvrusb2-sysfs.c b/drivers/media/usb/pvrusb2/pvrusb2-sysfs.c
new file mode 100644
index 0000000000..3077399901
--- /dev/null
+++ b/drivers/media/usb/pvrusb2/pvrusb2-sysfs.c
@@ -0,0 +1,811 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ *
+ *  Copyright (C) 2005 Mike Isely <isely@pobox.com>
+ */
+
+#include <linux/string.h>
+#include <linux/slab.h>
+#include "pvrusb2-sysfs.h"
+#include "pvrusb2-hdw.h"
+#include "pvrusb2-debug.h"
+#ifdef CONFIG_VIDEO_PVRUSB2_DEBUGIFC
+#include "pvrusb2-debugifc.h"
+#endif /* CONFIG_VIDEO_PVRUSB2_DEBUGIFC */
+
+#define pvr2_sysfs_trace(...) pvr2_trace(PVR2_TRACE_SYSFS,__VA_ARGS__)
+
+struct pvr2_sysfs {
+	struct pvr2_channel channel;
+	struct device *class_dev;
+#ifdef CONFIG_VIDEO_PVRUSB2_DEBUGIFC
+	struct pvr2_sysfs_debugifc *debugifc;
+#endif /* CONFIG_VIDEO_PVRUSB2_DEBUGIFC */
+	struct pvr2_sysfs_ctl_item *item_first;
+	struct pvr2_sysfs_ctl_item *item_last;
+	struct device_attribute attr_v4l_minor_number;
+	struct device_attribute attr_v4l_radio_minor_number;
+	struct device_attribute attr_unit_number;
+	struct device_attribute attr_bus_info;
+	struct device_attribute attr_hdw_name;
+	struct device_attribute attr_hdw_desc;
+	int v4l_minor_number_created_ok;
+	int v4l_radio_minor_number_created_ok;
+	int unit_number_created_ok;
+	int bus_info_created_ok;
+	int hdw_name_created_ok;
+	int hdw_desc_created_ok;
+};
+
+#ifdef CONFIG_VIDEO_PVRUSB2_DEBUGIFC
+struct pvr2_sysfs_debugifc {
+	struct device_attribute attr_debugcmd;
+	struct device_attribute attr_debuginfo;
+	int debugcmd_created_ok;
+	int debuginfo_created_ok;
+};
+#endif /* CONFIG_VIDEO_PVRUSB2_DEBUGIFC */
+
+struct pvr2_sysfs_ctl_item {
+	struct device_attribute attr_name;
+	struct device_attribute attr_type;
+	struct device_attribute attr_min;
+	struct device_attribute attr_max;
+	struct device_attribute attr_def;
+	struct device_attribute attr_enum;
+	struct device_attribute attr_bits;
+	struct device_attribute attr_val;
+	struct device_attribute attr_custom;
+	struct pvr2_ctrl *cptr;
+	int ctl_id;
+	struct pvr2_sysfs *chptr;
+	struct pvr2_sysfs_ctl_item *item_next;
+	struct attribute *attr_gen[8];
+	struct attribute_group grp;
+	int created_ok;
+	char name[80];
+};
+
+static ssize_t show_name(struct device *class_dev,
+			 struct device_attribute *attr,
+			 char *buf)
+{
+	struct pvr2_sysfs_ctl_item *cip;
+	const char *name;
+	cip = container_of(attr, struct pvr2_sysfs_ctl_item, attr_name);
+	name = pvr2_ctrl_get_desc(cip->cptr);
+	pvr2_sysfs_trace("pvr2_sysfs(%p) show_name(cid=%d) is %s",
+			 cip->chptr, cip->ctl_id, name);
+	if (!name) return -EINVAL;
+	return sysfs_emit(buf, "%s\n", name);
+}
+
+static ssize_t show_type(struct device *class_dev,
+			 struct device_attribute *attr,
+			 char *buf)
+{
+	struct pvr2_sysfs_ctl_item *cip;
+	const char *name;
+	enum pvr2_ctl_type tp;
+	cip = container_of(attr, struct pvr2_sysfs_ctl_item, attr_type);
+	tp = pvr2_ctrl_get_type(cip->cptr);
+	switch (tp) {
+	case pvr2_ctl_int: name = "integer"; break;
+	case pvr2_ctl_enum: name = "enum"; break;
+	case pvr2_ctl_bitmask: name = "bitmask"; break;
+	case pvr2_ctl_bool: name = "boolean"; break;
+	default: name = "?"; break;
+	}
+	pvr2_sysfs_trace("pvr2_sysfs(%p) show_type(cid=%d) is %s",
+			 cip->chptr, cip->ctl_id, name);
+	return sysfs_emit(buf, "%s\n", name);
+}
+
+static ssize_t show_min(struct device *class_dev,
+			struct device_attribute *attr,
+			char *buf)
+{
+	struct pvr2_sysfs_ctl_item *cip;
+	long val;
+	cip = container_of(attr, struct pvr2_sysfs_ctl_item, attr_min);
+	val = pvr2_ctrl_get_min(cip->cptr);
+	pvr2_sysfs_trace("pvr2_sysfs(%p) show_min(cid=%d) is %ld",
+			 cip->chptr, cip->ctl_id, val);
+	return sysfs_emit(buf, "%ld\n", val);
+}
+
+static ssize_t show_max(struct device *class_dev,
+			struct device_attribute *attr,
+			char *buf)
+{
+	struct pvr2_sysfs_ctl_item *cip;
+	long val;
+	cip = container_of(attr, struct pvr2_sysfs_ctl_item, attr_max);
+	val = pvr2_ctrl_get_max(cip->cptr);
+	pvr2_sysfs_trace("pvr2_sysfs(%p) show_max(cid=%d) is %ld",
+			 cip->chptr, cip->ctl_id, val);
+	return sysfs_emit(buf, "%ld\n", val);
+}
+
+static ssize_t show_def(struct device *class_dev,
+			struct device_attribute *attr,
+			char *buf)
+{
+	struct pvr2_sysfs_ctl_item *cip;
+	int val;
+	int ret;
+	unsigned int cnt = 0;
+	cip = container_of(attr, struct pvr2_sysfs_ctl_item, attr_def);
+	ret = pvr2_ctrl_get_def(cip->cptr, &val);
+	if (ret < 0) return ret;
+	ret = pvr2_ctrl_value_to_sym(cip->cptr, ~0, val,
+				     buf, PAGE_SIZE - 1, &cnt);
+	pvr2_sysfs_trace("pvr2_sysfs(%p) show_def(cid=%d) is %.*s (%d)",
+			 cip->chptr, cip->ctl_id, cnt, buf, val);
+	buf[cnt] = '\n';
+	return cnt + 1;
+}
+
+static ssize_t show_val_norm(struct device *class_dev,
+			     struct device_attribute *attr,
+			     char *buf)
+{
+	struct pvr2_sysfs_ctl_item *cip;
+	int val;
+	int ret;
+	unsigned int cnt = 0;
+	cip = container_of(attr, struct pvr2_sysfs_ctl_item, attr_val);
+	ret = pvr2_ctrl_get_value(cip->cptr, &val);
+	if (ret < 0) return ret;
+	ret = pvr2_ctrl_value_to_sym(cip->cptr, ~0, val,
+				     buf, PAGE_SIZE - 1, &cnt);
+	pvr2_sysfs_trace("pvr2_sysfs(%p) show_val_norm(cid=%d) is %.*s (%d)",
+			 cip->chptr, cip->ctl_id, cnt, buf, val);
+	buf[cnt] = '\n';
+	return cnt+1;
+}
+
+static ssize_t show_val_custom(struct device *class_dev,
+			       struct device_attribute *attr,
+			       char *buf)
+{
+	struct pvr2_sysfs_ctl_item *cip;
+	int val;
+	int ret;
+	unsigned int cnt = 0;
+	cip = container_of(attr, struct pvr2_sysfs_ctl_item, attr_custom);
+	ret = pvr2_ctrl_get_value(cip->cptr, &val);
+	if (ret < 0) return ret;
+	ret = pvr2_ctrl_custom_value_to_sym(cip->cptr, ~0, val,
+					    buf, PAGE_SIZE - 1, &cnt);
+	pvr2_sysfs_trace("pvr2_sysfs(%p) show_val_custom(cid=%d) is %.*s (%d)",
+			 cip->chptr, cip->ctl_id, cnt, buf, val);
+	buf[cnt] = '\n';
+	return cnt+1;
+}
+
+static ssize_t show_enum(struct device *class_dev,
+			 struct device_attribute *attr,
+			 char *buf)
+{
+	struct pvr2_sysfs_ctl_item *cip;
+	long val;
+	unsigned int bcnt, ccnt, ecnt;
+	cip = container_of(attr, struct pvr2_sysfs_ctl_item, attr_enum);
+	ecnt = pvr2_ctrl_get_cnt(cip->cptr);
+	bcnt = 0;
+	for (val = 0; val < ecnt; val++) {
+		pvr2_ctrl_get_valname(cip->cptr, val, buf + bcnt,
+				      PAGE_SIZE - bcnt, &ccnt);
+		if (!ccnt) continue;
+		bcnt += ccnt;
+		if (bcnt >= PAGE_SIZE) break;
+		buf[bcnt] = '\n';
+		bcnt++;
+	}
+	pvr2_sysfs_trace("pvr2_sysfs(%p) show_enum(cid=%d)",
+			 cip->chptr, cip->ctl_id);
+	return bcnt;
+}
+
+static ssize_t show_bits(struct device *class_dev,
+			 struct device_attribute *attr,
+			 char *buf)
+{
+	struct pvr2_sysfs_ctl_item *cip;
+	int valid_bits, msk;
+	unsigned int bcnt, ccnt;
+	cip = container_of(attr, struct pvr2_sysfs_ctl_item, attr_bits);
+	valid_bits = pvr2_ctrl_get_mask(cip->cptr);
+	bcnt = 0;
+	for (msk = 1; valid_bits; msk <<= 1) {
+		if (!(msk & valid_bits)) continue;
+		valid_bits &= ~msk;
+		pvr2_ctrl_get_valname(cip->cptr, msk, buf + bcnt,
+				      PAGE_SIZE - bcnt, &ccnt);
+		bcnt += ccnt;
+		if (bcnt >= PAGE_SIZE) break;
+		buf[bcnt] = '\n';
+		bcnt++;
+	}
+	pvr2_sysfs_trace("pvr2_sysfs(%p) show_bits(cid=%d)",
+			 cip->chptr, cip->ctl_id);
+	return bcnt;
+}
+
+static int store_val_any(struct pvr2_sysfs_ctl_item *cip, int customfl,
+			 const char *buf,unsigned int count)
+{
+	int ret;
+	int mask,val;
+	if (customfl) {
+		ret = pvr2_ctrl_custom_sym_to_value(cip->cptr, buf, count,
+						    &mask, &val);
+	} else {
+		ret = pvr2_ctrl_sym_to_value(cip->cptr, buf, count,
+					     &mask, &val);
+	}
+	if (ret < 0) return ret;
+	ret = pvr2_ctrl_set_mask_value(cip->cptr, mask, val);
+	pvr2_hdw_commit_ctl(cip->chptr->channel.hdw);
+	return ret;
+}
+
+static ssize_t store_val_norm(struct device *class_dev,
+			      struct device_attribute *attr,
+			      const char *buf, size_t count)
+{
+	struct pvr2_sysfs_ctl_item *cip;
+	int ret;
+	cip = container_of(attr, struct pvr2_sysfs_ctl_item, attr_val);
+	pvr2_sysfs_trace("pvr2_sysfs(%p) store_val_norm(cid=%d) \"%.*s\"",
+			 cip->chptr, cip->ctl_id, (int)count, buf);
+	ret = store_val_any(cip, 0, buf, count);
+	if (!ret) ret = count;
+	return ret;
+}
+
+static ssize_t store_val_custom(struct device *class_dev,
+				struct device_attribute *attr,
+				const char *buf, size_t count)
+{
+	struct pvr2_sysfs_ctl_item *cip;
+	int ret;
+	cip = container_of(attr, struct pvr2_sysfs_ctl_item, attr_custom);
+	pvr2_sysfs_trace("pvr2_sysfs(%p) store_val_custom(cid=%d) \"%.*s\"",
+			 cip->chptr, cip->ctl_id, (int)count, buf);
+	ret = store_val_any(cip, 1, buf, count);
+	if (!ret) ret = count;
+	return ret;
+}
+
+static void pvr2_sysfs_add_control(struct pvr2_sysfs *sfp,int ctl_id)
+{
+	struct pvr2_sysfs_ctl_item *cip;
+	struct pvr2_ctrl *cptr;
+	unsigned int cnt,acnt;
+	int ret;
+
+	cptr = pvr2_hdw_get_ctrl_by_index(sfp->channel.hdw,ctl_id);
+	if (!cptr) return;
+
+	cip = kzalloc(sizeof(*cip),GFP_KERNEL);
+	if (!cip) return;
+	pvr2_sysfs_trace("Creating pvr2_sysfs_ctl_item id=%p",cip);
+
+	cip->cptr = cptr;
+	cip->ctl_id = ctl_id;
+
+	cip->chptr = sfp;
+	cip->item_next = NULL;
+	if (sfp->item_last) {
+		sfp->item_last->item_next = cip;
+	} else {
+		sfp->item_first = cip;
+	}
+	sfp->item_last = cip;
+
+	sysfs_attr_init(&cip->attr_name.attr);
+	cip->attr_name.attr.name = "name";
+	cip->attr_name.attr.mode = S_IRUGO;
+	cip->attr_name.show = show_name;
+
+	sysfs_attr_init(&cip->attr_type.attr);
+	cip->attr_type.attr.name = "type";
+	cip->attr_type.attr.mode = S_IRUGO;
+	cip->attr_type.show = show_type;
+
+	sysfs_attr_init(&cip->attr_min.attr);
+	cip->attr_min.attr.name = "min_val";
+	cip->attr_min.attr.mode = S_IRUGO;
+	cip->attr_min.show = show_min;
+
+	sysfs_attr_init(&cip->attr_max.attr);
+	cip->attr_max.attr.name = "max_val";
+	cip->attr_max.attr.mode = S_IRUGO;
+	cip->attr_max.show = show_max;
+
+	sysfs_attr_init(&cip->attr_def.attr);
+	cip->attr_def.attr.name = "def_val";
+	cip->attr_def.attr.mode = S_IRUGO;
+	cip->attr_def.show = show_def;
+
+	sysfs_attr_init(&cip->attr_val.attr);
+	cip->attr_val.attr.name = "cur_val";
+	cip->attr_val.attr.mode = S_IRUGO;
+
+	sysfs_attr_init(&cip->attr_custom.attr);
+	cip->attr_custom.attr.name = "custom_val";
+	cip->attr_custom.attr.mode = S_IRUGO;
+
+	sysfs_attr_init(&cip->attr_enum.attr);
+	cip->attr_enum.attr.name = "enum_val";
+	cip->attr_enum.attr.mode = S_IRUGO;
+	cip->attr_enum.show = show_enum;
+
+	sysfs_attr_init(&cip->attr_bits.attr);
+	cip->attr_bits.attr.name = "bit_val";
+	cip->attr_bits.attr.mode = S_IRUGO;
+	cip->attr_bits.show = show_bits;
+
+	if (pvr2_ctrl_is_writable(cptr)) {
+		cip->attr_val.attr.mode |= S_IWUSR|S_IWGRP;
+		cip->attr_custom.attr.mode |= S_IWUSR|S_IWGRP;
+	}
+
+	acnt = 0;
+	cip->attr_gen[acnt++] = &cip->attr_name.attr;
+	cip->attr_gen[acnt++] = &cip->attr_type.attr;
+	cip->attr_gen[acnt++] = &cip->attr_val.attr;
+	cip->attr_gen[acnt++] = &cip->attr_def.attr;
+	cip->attr_val.show = show_val_norm;
+	cip->attr_val.store = store_val_norm;
+	if (pvr2_ctrl_has_custom_symbols(cptr)) {
+		cip->attr_gen[acnt++] = &cip->attr_custom.attr;
+		cip->attr_custom.show = show_val_custom;
+		cip->attr_custom.store = store_val_custom;
+	}
+	switch (pvr2_ctrl_get_type(cptr)) {
+	case pvr2_ctl_enum:
+		// Control is an enumeration
+		cip->attr_gen[acnt++] = &cip->attr_enum.attr;
+		break;
+	case pvr2_ctl_int:
+		// Control is an integer
+		cip->attr_gen[acnt++] = &cip->attr_min.attr;
+		cip->attr_gen[acnt++] = &cip->attr_max.attr;
+		break;
+	case pvr2_ctl_bitmask:
+		// Control is an bitmask
+		cip->attr_gen[acnt++] = &cip->attr_bits.attr;
+		break;
+	default: break;
+	}
+
+	cnt = scnprintf(cip->name,sizeof(cip->name)-1,"ctl_%s",
+			pvr2_ctrl_get_name(cptr));
+	cip->name[cnt] = 0;
+	cip->grp.name = cip->name;
+	cip->grp.attrs = cip->attr_gen;
+
+	ret = sysfs_create_group(&sfp->class_dev->kobj,&cip->grp);
+	if (ret) {
+		pvr2_trace(PVR2_TRACE_ERROR_LEGS,
+			   "sysfs_create_group error: %d",
+			   ret);
+		return;
+	}
+	cip->created_ok = !0;
+}
+
+#ifdef CONFIG_VIDEO_PVRUSB2_DEBUGIFC
+static ssize_t debuginfo_show(struct device *, struct device_attribute *,
+			      char *);
+static ssize_t debugcmd_show(struct device *, struct device_attribute *,
+			     char *);
+static ssize_t debugcmd_store(struct device *, struct device_attribute *,
+			      const char *, size_t count);
+
+static void pvr2_sysfs_add_debugifc(struct pvr2_sysfs *sfp)
+{
+	struct pvr2_sysfs_debugifc *dip;
+	int ret;
+
+	dip = kzalloc(sizeof(*dip),GFP_KERNEL);
+	if (!dip) return;
+	sysfs_attr_init(&dip->attr_debugcmd.attr);
+	dip->attr_debugcmd.attr.name = "debugcmd";
+	dip->attr_debugcmd.attr.mode = S_IRUGO|S_IWUSR|S_IWGRP;
+	dip->attr_debugcmd.show = debugcmd_show;
+	dip->attr_debugcmd.store = debugcmd_store;
+	sysfs_attr_init(&dip->attr_debuginfo.attr);
+	dip->attr_debuginfo.attr.name = "debuginfo";
+	dip->attr_debuginfo.attr.mode = S_IRUGO;
+	dip->attr_debuginfo.show = debuginfo_show;
+	sfp->debugifc = dip;
+	ret = device_create_file(sfp->class_dev,&dip->attr_debugcmd);
+	if (ret < 0) {
+		pvr2_trace(PVR2_TRACE_ERROR_LEGS,
+			   "device_create_file error: %d",
+			   ret);
+	} else {
+		dip->debugcmd_created_ok = !0;
+	}
+	ret = device_create_file(sfp->class_dev,&dip->attr_debuginfo);
+	if (ret < 0) {
+		pvr2_trace(PVR2_TRACE_ERROR_LEGS,
+			   "device_create_file error: %d",
+			   ret);
+	} else {
+		dip->debuginfo_created_ok = !0;
+	}
+}
+
+
+static void pvr2_sysfs_tear_down_debugifc(struct pvr2_sysfs *sfp)
+{
+	if (!sfp->debugifc) return;
+	if (sfp->debugifc->debuginfo_created_ok) {
+		device_remove_file(sfp->class_dev,
+					 &sfp->debugifc->attr_debuginfo);
+	}
+	if (sfp->debugifc->debugcmd_created_ok) {
+		device_remove_file(sfp->class_dev,
+					 &sfp->debugifc->attr_debugcmd);
+	}
+	kfree(sfp->debugifc);
+	sfp->debugifc = NULL;
+}
+#endif /* CONFIG_VIDEO_PVRUSB2_DEBUGIFC */
+
+
+static void pvr2_sysfs_add_controls(struct pvr2_sysfs *sfp)
+{
+	unsigned int idx,cnt;
+	cnt = pvr2_hdw_get_ctrl_count(sfp->channel.hdw);
+	for (idx = 0; idx < cnt; idx++) {
+		pvr2_sysfs_add_control(sfp,idx);
+	}
+}
+
+
+static void pvr2_sysfs_tear_down_controls(struct pvr2_sysfs *sfp)
+{
+	struct pvr2_sysfs_ctl_item *cip1,*cip2;
+	for (cip1 = sfp->item_first; cip1; cip1 = cip2) {
+		cip2 = cip1->item_next;
+		if (cip1->created_ok) {
+			sysfs_remove_group(&sfp->class_dev->kobj,&cip1->grp);
+		}
+		pvr2_sysfs_trace("Destroying pvr2_sysfs_ctl_item id=%p",cip1);
+		kfree(cip1);
+	}
+}
+
+
+static void pvr2_sysfs_release(struct device *class_dev)
+{
+	pvr2_sysfs_trace("Releasing class_dev id=%p",class_dev);
+	kfree(class_dev);
+}
+
+
+static struct class pvr2_class = {
+	.name		= "pvrusb2",
+	.dev_release	= pvr2_sysfs_release,
+};
+
+
+static void class_dev_destroy(struct pvr2_sysfs *sfp)
+{
+	struct device *dev;
+	if (!sfp->class_dev) return;
+#ifdef CONFIG_VIDEO_PVRUSB2_DEBUGIFC
+	pvr2_sysfs_tear_down_debugifc(sfp);
+#endif /* CONFIG_VIDEO_PVRUSB2_DEBUGIFC */
+	pvr2_sysfs_tear_down_controls(sfp);
+	if (sfp->hdw_desc_created_ok) {
+		device_remove_file(sfp->class_dev,
+				   &sfp->attr_hdw_desc);
+	}
+	if (sfp->hdw_name_created_ok) {
+		device_remove_file(sfp->class_dev,
+				   &sfp->attr_hdw_name);
+	}
+	if (sfp->bus_info_created_ok) {
+		device_remove_file(sfp->class_dev,
+					 &sfp->attr_bus_info);
+	}
+	if (sfp->v4l_minor_number_created_ok) {
+		device_remove_file(sfp->class_dev,
+					 &sfp->attr_v4l_minor_number);
+	}
+	if (sfp->v4l_radio_minor_number_created_ok) {
+		device_remove_file(sfp->class_dev,
+					 &sfp->attr_v4l_radio_minor_number);
+	}
+	if (sfp->unit_number_created_ok) {
+		device_remove_file(sfp->class_dev,
+					 &sfp->attr_unit_number);
+	}
+	pvr2_sysfs_trace("Destroying class_dev id=%p",sfp->class_dev);
+	dev_set_drvdata(sfp->class_dev, NULL);
+	dev = sfp->class_dev->parent;
+	sfp->class_dev->parent = NULL;
+	put_device(dev);
+	device_unregister(sfp->class_dev);
+	sfp->class_dev = NULL;
+}
+
+
+static ssize_t v4l_minor_number_show(struct device *class_dev,
+				     struct device_attribute *attr, char *buf)
+{
+	struct pvr2_sysfs *sfp;
+	sfp = dev_get_drvdata(class_dev);
+	if (!sfp) return -EINVAL;
+	return sysfs_emit(buf, "%d\n",
+			 pvr2_hdw_v4l_get_minor_number(sfp->channel.hdw,
+						       pvr2_v4l_type_video));
+}
+
+
+static ssize_t bus_info_show(struct device *class_dev,
+			     struct device_attribute *attr, char *buf)
+{
+	struct pvr2_sysfs *sfp;
+	sfp = dev_get_drvdata(class_dev);
+	if (!sfp) return -EINVAL;
+	return sysfs_emit(buf, "%s\n",
+			 pvr2_hdw_get_bus_info(sfp->channel.hdw));
+}
+
+
+static ssize_t hdw_name_show(struct device *class_dev,
+			     struct device_attribute *attr, char *buf)
+{
+	struct pvr2_sysfs *sfp;
+	sfp = dev_get_drvdata(class_dev);
+	if (!sfp) return -EINVAL;
+	return sysfs_emit(buf, "%s\n",
+			 pvr2_hdw_get_type(sfp->channel.hdw));
+}
+
+
+static ssize_t hdw_desc_show(struct device *class_dev,
+			     struct device_attribute *attr, char *buf)
+{
+	struct pvr2_sysfs *sfp;
+	sfp = dev_get_drvdata(class_dev);
+	if (!sfp) return -EINVAL;
+	return sysfs_emit(buf, "%s\n",
+			 pvr2_hdw_get_desc(sfp->channel.hdw));
+}
+
+
+static ssize_t v4l_radio_minor_number_show(struct device *class_dev,
+					   struct device_attribute *attr,
+					   char *buf)
+{
+	struct pvr2_sysfs *sfp;
+	sfp = dev_get_drvdata(class_dev);
+	if (!sfp) return -EINVAL;
+	return sysfs_emit(buf, "%d\n",
+			 pvr2_hdw_v4l_get_minor_number(sfp->channel.hdw,
+						       pvr2_v4l_type_radio));
+}
+
+
+static ssize_t unit_number_show(struct device *class_dev,
+				struct device_attribute *attr, char *buf)
+{
+	struct pvr2_sysfs *sfp;
+	sfp = dev_get_drvdata(class_dev);
+	if (!sfp) return -EINVAL;
+	return sysfs_emit(buf, "%d\n",
+			 pvr2_hdw_get_unit_number(sfp->channel.hdw));
+}
+
+
+static void class_dev_create(struct pvr2_sysfs *sfp)
+{
+	struct usb_device *usb_dev;
+	struct device *class_dev;
+	int ret;
+
+	usb_dev = pvr2_hdw_get_dev(sfp->channel.hdw);
+	if (!usb_dev) return;
+	class_dev = kzalloc(sizeof(*class_dev),GFP_KERNEL);
+	if (!class_dev) return;
+
+	pvr2_sysfs_trace("Creating class_dev id=%p",class_dev);
+
+	class_dev->class = &pvr2_class;
+
+	dev_set_name(class_dev, "%s",
+		     pvr2_hdw_get_device_identifier(sfp->channel.hdw));
+
+	class_dev->parent = get_device(&usb_dev->dev);
+
+	sfp->class_dev = class_dev;
+	dev_set_drvdata(class_dev, sfp);
+	ret = device_register(class_dev);
+	if (ret) {
+		pvr2_trace(PVR2_TRACE_ERROR_LEGS,
+			   "device_register failed");
+		put_device(class_dev);
+		return;
+	}
+
+	sysfs_attr_init(&sfp->attr_v4l_minor_number.attr);
+	sfp->attr_v4l_minor_number.attr.name = "v4l_minor_number";
+	sfp->attr_v4l_minor_number.attr.mode = S_IRUGO;
+	sfp->attr_v4l_minor_number.show = v4l_minor_number_show;
+	sfp->attr_v4l_minor_number.store = NULL;
+	ret = device_create_file(sfp->class_dev,
+				       &sfp->attr_v4l_minor_number);
+	if (ret < 0) {
+		pvr2_trace(PVR2_TRACE_ERROR_LEGS,
+			   "device_create_file error: %d",
+			   ret);
+	} else {
+		sfp->v4l_minor_number_created_ok = !0;
+	}
+
+	sysfs_attr_init(&sfp->attr_v4l_radio_minor_number.attr);
+	sfp->attr_v4l_radio_minor_number.attr.name = "v4l_radio_minor_number";
+	sfp->attr_v4l_radio_minor_number.attr.mode = S_IRUGO;
+	sfp->attr_v4l_radio_minor_number.show = v4l_radio_minor_number_show;
+	sfp->attr_v4l_radio_minor_number.store = NULL;
+	ret = device_create_file(sfp->class_dev,
+				       &sfp->attr_v4l_radio_minor_number);
+	if (ret < 0) {
+		pvr2_trace(PVR2_TRACE_ERROR_LEGS,
+			   "device_create_file error: %d",
+			   ret);
+	} else {
+		sfp->v4l_radio_minor_number_created_ok = !0;
+	}
+
+	sysfs_attr_init(&sfp->attr_unit_number.attr);
+	sfp->attr_unit_number.attr.name = "unit_number";
+	sfp->attr_unit_number.attr.mode = S_IRUGO;
+	sfp->attr_unit_number.show = unit_number_show;
+	sfp->attr_unit_number.store = NULL;
+	ret = device_create_file(sfp->class_dev,&sfp->attr_unit_number);
+	if (ret < 0) {
+		pvr2_trace(PVR2_TRACE_ERROR_LEGS,
+			   "device_create_file error: %d",
+			   ret);
+	} else {
+		sfp->unit_number_created_ok = !0;
+	}
+
+	sysfs_attr_init(&sfp->attr_bus_info.attr);
+	sfp->attr_bus_info.attr.name = "bus_info_str";
+	sfp->attr_bus_info.attr.mode = S_IRUGO;
+	sfp->attr_bus_info.show = bus_info_show;
+	sfp->attr_bus_info.store = NULL;
+	ret = device_create_file(sfp->class_dev,
+				       &sfp->attr_bus_info);
+	if (ret < 0) {
+		pvr2_trace(PVR2_TRACE_ERROR_LEGS,
+			   "device_create_file error: %d",
+			   ret);
+	} else {
+		sfp->bus_info_created_ok = !0;
+	}
+
+	sysfs_attr_init(&sfp->attr_hdw_name.attr);
+	sfp->attr_hdw_name.attr.name = "device_hardware_type";
+	sfp->attr_hdw_name.attr.mode = S_IRUGO;
+	sfp->attr_hdw_name.show = hdw_name_show;
+	sfp->attr_hdw_name.store = NULL;
+	ret = device_create_file(sfp->class_dev,
+				 &sfp->attr_hdw_name);
+	if (ret < 0) {
+		pvr2_trace(PVR2_TRACE_ERROR_LEGS,
+			   "device_create_file error: %d",
+			   ret);
+	} else {
+		sfp->hdw_name_created_ok = !0;
+	}
+
+	sysfs_attr_init(&sfp->attr_hdw_desc.attr);
+	sfp->attr_hdw_desc.attr.name = "device_hardware_description";
+	sfp->attr_hdw_desc.attr.mode = S_IRUGO;
+	sfp->attr_hdw_desc.show = hdw_desc_show;
+	sfp->attr_hdw_desc.store = NULL;
+	ret = device_create_file(sfp->class_dev,
+				 &sfp->attr_hdw_desc);
+	if (ret < 0) {
+		pvr2_trace(PVR2_TRACE_ERROR_LEGS,
+			   "device_create_file error: %d",
+			   ret);
+	} else {
+		sfp->hdw_desc_created_ok = !0;
+	}
+
+	pvr2_sysfs_add_controls(sfp);
+#ifdef CONFIG_VIDEO_PVRUSB2_DEBUGIFC
+	pvr2_sysfs_add_debugifc(sfp);
+#endif /* CONFIG_VIDEO_PVRUSB2_DEBUGIFC */
+}
+
+
+static void pvr2_sysfs_internal_check(struct pvr2_channel *chp)
+{
+	struct pvr2_sysfs *sfp;
+	sfp = container_of(chp,struct pvr2_sysfs,channel);
+	if (!sfp->channel.mc_head->disconnect_flag) return;
+	pvr2_trace(PVR2_TRACE_STRUCT,"Destroying pvr2_sysfs id=%p",sfp);
+	class_dev_destroy(sfp);
+	pvr2_channel_done(&sfp->channel);
+	kfree(sfp);
+}
+
+
+void pvr2_sysfs_create(struct pvr2_context *mp)
+{
+	struct pvr2_sysfs *sfp;
+	sfp = kzalloc(sizeof(*sfp),GFP_KERNEL);
+	if (!sfp)
+		return;
+	pvr2_trace(PVR2_TRACE_STRUCT,"Creating pvr2_sysfs id=%p",sfp);
+	pvr2_channel_init(&sfp->channel,mp);
+	sfp->channel.check_func = pvr2_sysfs_internal_check;
+
+	class_dev_create(sfp);
+}
+
+
+void pvr2_sysfs_class_create(void)
+{
+	if (class_register(&pvr2_class))
+		pvr2_sysfs_trace("Registration failed for pvr2_sysfs_class");
+}
+
+
+void pvr2_sysfs_class_destroy(void)
+{
+	class_unregister(&pvr2_class);
+}
+
+
+#ifdef CONFIG_VIDEO_PVRUSB2_DEBUGIFC
+static ssize_t debuginfo_show(struct device *class_dev,
+			      struct device_attribute *attr, char *buf)
+{
+	struct pvr2_sysfs *sfp;
+	sfp = dev_get_drvdata(class_dev);
+	if (!sfp) return -EINVAL;
+	pvr2_hdw_trigger_module_log(sfp->channel.hdw);
+	return pvr2_debugifc_print_info(sfp->channel.hdw,buf,PAGE_SIZE);
+}
+
+
+static ssize_t debugcmd_show(struct device *class_dev,
+			     struct device_attribute *attr, char *buf)
+{
+	struct pvr2_sysfs *sfp;
+	sfp = dev_get_drvdata(class_dev);
+	if (!sfp) return -EINVAL;
+	return pvr2_debugifc_print_status(sfp->channel.hdw,buf,PAGE_SIZE);
+}
+
+
+static ssize_t debugcmd_store(struct device *class_dev,
+			      struct device_attribute *attr,
+			      const char *buf, size_t count)
+{
+	struct pvr2_sysfs *sfp;
+	int ret;
+
+	sfp = dev_get_drvdata(class_dev);
+	if (!sfp) return -EINVAL;
+
+	ret = pvr2_debugifc_docmd(sfp->channel.hdw,buf,count);
+	if (ret < 0) return ret;
+	return count;
+}
+#endif /* CONFIG_VIDEO_PVRUSB2_DEBUGIFC */