1 /*
2 * dvb-dibusb-pid.c is part of the driver for mobile USB Budget DVB-T devices
3 * based on reference design made by DiBcom (http://www.dibcom.fr/)
4 *
5 * Copyright (C) 2004-5 Patrick Boettcher (patrick.boettcher@desy.de)
6 *
7 * see dvb-dibusb-core.c for more copyright details.
8 *
9 * This file contains functions for initializing and handling the internal
10 * pid-list. This pid-list mirrors the information currently stored in the
11 * devices pid-list.
12 */
13 #include "dvb-dibusb.h"
14
15 int dibusb_pid_list_init(struct usb_dibusb *dib)
16 {
17 int i;
18 dib->pid_list = kmalloc(sizeof(struct dibusb_pid) * dib->dibdev->dev_cl->demod->pid_filter_count,GFP_KERNEL);
19 if (dib->pid_list == NULL)
20 return -ENOMEM;
21
22 deb_xfer("initializing %d pids for the pid_list.\n",dib->dibdev->dev_cl->demod->pid_filter_count);
23
24 dib->pid_list_lock = SPIN_LOCK_UNLOCKED;
25 memset(dib->pid_list,0,dib->dibdev->dev_cl->demod->pid_filter_count*(sizeof(struct dibusb_pid)));
26 for (i=0; i < dib->dibdev->dev_cl->demod->pid_filter_count; i++) {
27 dib->pid_list[i].index = i;
28 dib->pid_list[i].pid = 0;
29 dib->pid_list[i].active = 0;
30 }
31
32 dib->init_state |= DIBUSB_STATE_PIDLIST;
33 return 0;
34 }
35
36 void dibusb_pid_list_exit(struct usb_dibusb *dib)
37 {
38 if (dib->init_state & DIBUSB_STATE_PIDLIST)
39 kfree(dib->pid_list);
40 dib->init_state &= ~DIBUSB_STATE_PIDLIST;
41 }
42
43 /* fetch a pid from pid_list and set it on or off */
44 int dibusb_ctrl_pid(struct usb_dibusb *dib, struct dvb_demux_feed *dvbdmxfeed , int onoff)
45 {
46 int i,ret = -1;
47 unsigned long flags;
48 u16 pid = dvbdmxfeed->pid;
49
50 if (onoff) {
51 spin_lock_irqsave(&dib->pid_list_lock,flags);
52 for (i=0; i < dib->dibdev->dev_cl->demod->pid_filter_count; i++)
53 if (!dib->pid_list[i].active) {
54 dib->pid_list[i].pid = pid;
55 dib->pid_list[i].active = 1;
56 ret = i;
57 break;
58 }
59 dvbdmxfeed->priv = &dib->pid_list[ret];
60 spin_unlock_irqrestore(&dib->pid_list_lock,flags);
61
62 if (dib->xfer_ops.pid_ctrl != NULL)
63 dib->xfer_ops.pid_ctrl(dib->fe,dib->pid_list[ret].index,dib->pid_list[ret].pid,1);
64 } else {
65 struct dibusb_pid *dpid = dvbdmxfeed->priv;
66
67 if (dib->xfer_ops.pid_ctrl != NULL)
68 dib->xfer_ops.pid_ctrl(dib->fe,dpid->index,0,0);
69
70 dpid->pid = 0;
71 dpid->active = 0;
72 ret = dpid->index;
73 }
74
75 /* a free pid from the list */
76 deb_info("setting pid: %5d %04x at index %d '%s'\n",pid,pid,ret,onoff ? "on" : "off");
77
78 return ret;
79 }
80
81
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