drivers/media/dvb/mantis/mantis_ca.c

   1 /*
   2         Mantis PCI bridge driver
   3
   4         Copyright (C) 2005, 2006 Manu Abraham (abraham.manu@gmail.com)
   5
   6         This program is free software; you can redistribute it and/or modify
   7         it under the terms of the GNU General Public License as published by
   8         the Free Software Foundation; either version 2 of the License, or
   9         (at your option) any later version.
  10
  11         This program is distributed in the hope that it will be useful,
  12         but WITHOUT ANY WARRANTY; without even the implied warranty of
  13         MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14         GNU General Public License for more details.
  15
  16         You should have received a copy of the GNU General Public License
  17         along with this program; if not, write to the Free Software
  18         Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  19 */
  20
  21 #include "mantis_common.h"
  22 #include "mantis_link.h"
  23 #include "mantis_hif.h"
  24
  25
  26 static int mantis_ca_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long parg)
  27 {
  28         return 0;
  29 }
  30
  31 static int mantis_ca_open(struct inode *inode, struct file *file)
  32 {
  33         return 0;
  34 }
  35
  36 static int mantis_ca_release(struct inode *inode, struct file *file)
  37 {
  38         return 0;
  39 }
  40
  41 static ssize_t mantis_ca_read(struct file *file, char __user *buffer, size_t count, loff_t *ofset)
  42 {
  43         struct dvb_device *dvbdev       = file->private_data;
  44         struct mantis_ca *ca            = dvbdev->priv;
  45
  46         int status;
  47
  48         return 0;
  49 error:
  50         return status;
  51 }
  52
  53 static ssize_t mantis_ca_write(struct file *file, const char __user *buffer, size_t count, loff_t *offset)
  54 {
  55         struct dvb_device *dvbdev       = file->private_data;
  56         struct mantis_ca *ca            = dvbdev->priv;
  57
  58         int status;
  59
  60         return 0;
  61 error:
  62         return status;
  63 }
  64
  65 static struct file_operations mantis_fops = {
  66         .owner          = THIS_MODULE,
  67         .ioctl          = mantis_ca_ioctl,
  68         .open           = mantis_ca_open,
  69         .release        = mantis_ca_release,
  70         .read           = mantis_ca_read,
  71         .write          = mantis_ca_write,
  72 };
  73
  74 static struct dvb_device mantis_ca = {
  75         .priv           = NULL,
  76         .users          = 1,
  77         .readers        = 1,
  78         .writers        = 1,
  79         .fops           = &mantis_fops,
  80 };
  81
  82 struct dvb_device *mantis_ca_init(struct mantis_pci *mantis)
  83 {
  84         int ret;
  85
  86         struct dvb_device *dvbdev;
  87         struct dvb_adapter *dvb_adapter = &mantis->dvb_adapter;
  88         struct mantis_ca *ca;
  89
  90         if (!(ca = kzalloc(sizeof (struct mantis_ca), GFP_KERNEL))) {
  91                 dprintk(verbose, MANTIS_ERROR, 1, "Out of memory!, exiting ..");
  92                 return NULL;
  93         }
  94
  95         ca->ca_priv = mantis;
  96         mantis->mantis_ca = ca;
  97         mantis_evmgr_init(ca);
  98
  99         dprintk(verbose, MANTIS_ERROR, 0, "CA: Registering Mantis Adapter(%d) Slot(0)\n", mantis->num);
 100         if (dvb_register_device(dvb_adapter, &dvbdev, &mantis_ca, ca, DVB_DEVICE_CA) == 0) {
 101                 ca->ca_dev = dvbdev;
 102                 return ca->ca_dev;
 103         }
 104         return 0;
 105
 106 error:
 107         if (ca != NULL) {
 108                 dprintk(verbose, MANTIS_ERROR, 1, "Error ..");
 109                 if (ca->ca_dev != NULL)
 110                         dvb_unregister_device(ca->ca_dev);
 111
 112                 kfree(ca);
 113         }
 114         return NULL;
 115 }
 116
 117 void mantis_ca_exit(struct mantis_pci *mantis)
 118 {
 119         struct mantis_ca *ca = mantis->mantis_ca;
 120
 121         mantis_evmgr_exit(ca);
 122         dprintk(verbose, MANTIS_ERROR, 0, "CA: Unregister Mantis Adapter(%d) Slot(0)\n", mantis->num);
 123         if (ca->ca_dev)
 124                 dvb_unregister_device(ca->ca_dev);
 125
 126         kfree(ca);
 127 }