path: root/drivers/media/video/pvrusb2/pvrusb2-sysfs.c

/*
 *
 *  $Id$
 *
 *  Copyright (C) 2005 Mike Isely <isely@pobox.com>
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 */

#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_enum;
	struct device_attribute attr_bits;
	struct device_attribute attr_val;
	struct device_attribute attr_custom;
	struct pvr2_ctrl *cptr;
	struct pvr2_sysfs *chptr;
	struct pvr2_sysfs_ctl_item *item_next;
	struct attribute *attr_gen[7];
	struct attribute_group grp;
	int created_ok;
	char name[80];
};

struct pvr2_sysfs_class {
	struct class class;
};

static ssize_t show_name(int id,struct device *class_dev,char *buf)
{
	struct pvr2_ctrl *cptr;
	struct pvr2_sysfs *sfp;
	const char *name;

	sfp = (struct pvr2_sysfs *)class_dev->driver_data;
	if (!sfp) return -EINVAL;
	cptr = pvr2_hdw_get_ctrl_by_index(sfp->channel.hdw,id);
	if (!cptr) return -EINVAL;

	name = pvr2_ctrl_get_desc(cptr);
	pvr2_sysfs_trace("pvr2_sysfs(%p) show_name(cid=%d) is %s",sfp,id,name);

	if (!name) return -EINVAL;

	return scnprintf(buf,PAGE_SIZE,"%s\n",name);
}

static ssize_t show_type(int id,struct device *class_dev,char *buf)
{
	struct pvr2_ctrl *cptr;
	struct pvr2_sysfs *sfp;
	const char *name;
	enum pvr2_ctl_type tp;

	sfp = (struct pvr2_sysfs *)class_dev->driver_data;
	if (!sfp) return -EINVAL;
	cptr = pvr2_hdw_get_ctrl_by_index(sfp->channel.hdw,id);
	if (!cptr) return -EINVAL;

	tp = pvr2_ctrl_get_type(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",sfp,id,name);

	if (!name) return -EINVAL;

	return scnprintf(buf,PAGE_SIZE,"%s\n",name);
}

static ssize_t show_min