/* * dvb-dibusb-pid.c is part of the driver for mobile USB Budget DVB-T devices  * based on reference design made by DiBcom (http://www.dibcom.fr/) * * Copyright (C) 2004-5 Patrick Boettcher (patrick.boettcher@desy.de) * * see dvb-dibusb-core.c for more copyright details. * * This file contains functions for initializing and handling the internal * pid-list. This pid-list mirrors the information currently stored in the * devices pid-list. */#include "dvb-dibusb.h"int dibusb_pid_list_init(struct usb_dibusb *dib){	int i;	dib->pid_list = kmalloc(sizeof(struct dibusb_pid) * dib->dibdev->dev_cl->demod->pid_filter_count,GFP_KERNEL);	if (dib->pid_list == NULL)		return -ENOMEM;	deb_xfer("initializing %d pids for the pid_list.\n",dib->dibdev->dev_cl->demod->pid_filter_count);		dib->pid_list_lock = SPIN_LOCK_UNLOCKED;	memset(dib->pid_list,0,dib->dibdev->dev_cl->demod->pid_filter_count*(sizeof(struct dibusb_pid)));	for (i=0; i < dib->dibdev->dev_cl->demod->pid_filter_count; i++) {		dib->pid_list[i].index = i;		dib->pid_list[i].pid = 0;		dib->pid_list[i].active = 0;	}	dib->init_state |= DIBUSB_STATE_PIDLIST;	return 0;}void dibusb_pid_list_exit(struct usb_dibusb *dib){	if (dib->init_state & DIBUSB_STATE_PIDLIST)		kfree(dib->pid_list);	dib->init_state &= ~DIBUSB_STATE_PIDLIST;}/* fetch a pid from pid_list and set it on or off */int dibusb_ctrl_pid(struct usb_dibusb *dib, struct dvb_demux_feed *dvbdmxfeed , int onoff){	int i,ret = -1;	unsigned long flags;	u16 pid = dvbdmxfeed->pid;	if (onoff) {		spin_lock_irqsave(&dib->pid_list_lock,flags);		for (i=0; i < dib->dibdev->dev_cl->demod->pid_filter_count; i++)			if (!dib->pid_list[i].active) {				dib->pid_list[i].pid = pid;				dib->pid_list[i].active = 1;				ret = i;				break;			}		dvbdmxfeed->priv = &dib->pid_list[ret];		spin_unlock_irqrestore(&dib->pid_list_lock,flags);				if (dib->xfer_ops.pid_ctrl != NULL) 			dib->xfer_ops.pid_ctrl(dib->fe,dib->pid_list[ret].index,dib->pid_list[ret].pid,1);	} else {		struct dibusb_pid *dpid = dvbdmxfeed->priv;				if (dib->xfer_ops.pid_ctrl != NULL) 			dib->xfer_ops.pid_ctrl(dib->fe,dpid->index,0,0);				dpid->pid = 0;		dpid->active = 0;		ret = dpid->index;	}		/* a free pid from the list */	deb_info("setting pid: %5d %04x at index %d '%s'\n",pid,pid,ret,onoff ? "on" : "off");	return ret;}