drivers/media/dvb/firesat/firesat-ci.c

   1 /*
   2  * FireDTV driver (formerly known as FireSAT)
   3  *
   4  * Copyright (C) 2004 Andreas Monitzer <andy@monitzer.com>
   5  * Copyright (C) 2008 Henrik Kurelid <henrik@kurelid.se>
   6  *
   7  *      This program is free software; you can redistribute it and/or
   8  *      modify it under the terms of the GNU General Public License as
   9  *      published by the Free Software Foundation; either version 2 of
  10  *      the License, or (at your option) any later version.
  11  */
  12
  13 #include <linux/dvb/ca.h>
  14 #include <linux/fs.h>
  15 #include <linux/module.h>
  16
  17 #include <dvbdev.h>
  18
  19 #include "avc_api.h"
  20 #include "firesat.h"
  21 #include "firesat-ci.h"
  22
  23 static int firesat_ca_ready(ANTENNA_INPUT_INFO *info)
  24 {
  25         return info->CaInitializationStatus == 1 &&
  26                info->CaErrorFlag == 0 &&
  27                info->CaDvbFlag == 1 &&
  28                info->CaModulePresentStatus == 1;
  29 }
  30
  31 static int firesat_get_ca_flags(ANTENNA_INPUT_INFO *info)
  32 {
  33         int flags = 0;
  34
  35         if (info->CaModulePresentStatus == 1)
  36                 flags |= CA_CI_MODULE_PRESENT;
  37         if (info->CaInitializationStatus == 1 &&
  38             info->CaErrorFlag == 0 &&
  39             info->CaDvbFlag == 1)
  40                 flags |= CA_CI_MODULE_READY;
  41         return flags;
  42 }
  43
  44 static int firesat_ca_reset(struct firesat *firesat)
  45 {
  46         return avc_ca_reset(firesat) ? -EFAULT : 0;
  47 }
  48
  49 static int firesat_ca_get_caps(void *arg)
  50 {
  51         struct ca_caps *cap = arg;
  52
  53         cap->slot_num = 1;
  54         cap->slot_type = CA_CI;
  55         cap->descr_num = 1;
  56         cap->descr_type = CA_ECD;
  57         return 0;
  58 }
  59
  60 static int firesat_ca_get_slot_info(struct firesat *firesat, void *arg)
  61 {
  62         ANTENNA_INPUT_INFO info;
  63         struct ca_slot_info *slot = arg;
  64
  65         if (avc_tuner_status(firesat, &info))
  66                 return -EFAULT;
  67
  68         if (slot->num != 0)
  69                 return -EFAULT;
  70
  71         slot->type = CA_CI;
  72         slot->flags = firesat_get_ca_flags(&info);
  73         return 0;
  74 }
  75
  76 static int firesat_ca_app_info(struct firesat *firesat, void *arg)
  77 {
  78         struct ca_msg *reply = arg;
  79
  80         return
  81             avc_ca_app_info(firesat, reply->msg, &reply->length) ? -EFAULT : 0;
  82 }
  83
  84 static int firesat_ca_info(struct firesat *firesat, void *arg)
  85 {
  86         struct ca_msg *reply = arg;
  87
  88         return avc_ca_info(firesat, reply->msg, &reply->length) ? -EFAULT : 0;
  89 }
  90
  91 static int firesat_ca_get_mmi(struct firesat *firesat, void *arg)
  92 {
  93         struct ca_msg *reply = arg;
  94
  95         return
  96             avc_ca_get_mmi(firesat, reply->msg, &reply->length) ? -EFAULT : 0;
  97 }
  98
  99 static int firesat_ca_get_msg(struct firesat *firesat, void *arg)
 100 {
 101         ANTENNA_INPUT_INFO info;
 102         int err;
 103
 104         switch (firesat->ca_last_command) {
 105         case TAG_APP_INFO_ENQUIRY:
 106                 err = firesat_ca_app_info(firesat, arg);
 107                 break;
 108         case TAG_CA_INFO_ENQUIRY:
 109                 err = firesat_ca_info(firesat, arg);
 110                 break;
 111         default:
 112                 if (avc_tuner_status(firesat, &info))
 113                         err = -EFAULT;
 114                 else if (info.CaMmi == 1)
 115                         err = firesat_ca_get_mmi(firesat, arg);
 116                 else {
 117                         printk(KERN_INFO "%s: Unhandled message 0x%08X\n",
 118                                __func__, firesat->ca_last_command);
 119                         err = -EFAULT;
 120                 }
 121         }
 122         firesat->ca_last_command = 0;
 123         return err;
 124 }
 125
 126 static int firesat_ca_pmt(struct firesat *firesat, void *arg)
 127 {
 128         struct ca_msg *msg = arg;
 129         int data_pos;
 130         int data_length;
 131         int i;
 132
 133         data_pos = 4;
 134         if (msg->msg[3] & 0x80) {
 135                 data_length = 0;
 136                 for (i = 0; i < (msg->msg[3] & 0x7F); i++)
 137                         data_length = (data_length << 8) + msg->msg[data_pos++];
 138         } else {
 139                 data_length = msg->msg[3];
 140         }
 141
 142         return avc_ca_pmt(firesat, &msg->msg[data_pos], data_length) ?
 143                -EFAULT : 0;
 144 }
 145
 146 static int firesat_ca_send_msg(struct firesat *firesat, void *arg)
 147 {
 148         struct ca_msg *msg = arg;
 149         int err;
 150
 151         /* Do we need a semaphore for this? */
 152         firesat->ca_last_command =
 153                 (msg->msg[0] << 16) + (msg->msg[1] << 8) + msg->msg[2];
 154         switch (firesat->ca_last_command) {
 155         case TAG_CA_PMT:
 156                 err = firesat_ca_pmt(firesat, arg);
 157                 break;
 158         case TAG_APP_INFO_ENQUIRY:
 159                 /* handled in ca_get_msg */
 160                 err = 0;
 161                 break;
 162         case TAG_CA_INFO_ENQUIRY:
 163                 /* handled in ca_get_msg */
 164                 err = 0;
 165                 break;
 166         case TAG_ENTER_MENU:
 167                 err = avc_ca_enter_menu(firesat);
 168                 break;
 169         default:
 170                 printk(KERN_ERR "%s: Unhandled unknown message 0x%08X\n",
 171                        __func__, firesat->ca_last_command);
 172                 err = -EFAULT;
 173         }
 174         return err;
 175 }
 176
 177 static int firesat_ca_ioctl(struct inode *inode, struct file *file,
 178                             unsigned int cmd, void *arg)
 179 {
 180         struct dvb_device *dvbdev = file->private_data;
 181         struct firesat *firesat = dvbdev->priv;
 182         ANTENNA_INPUT_INFO info;
 183         int err;
 184
 185         switch(cmd) {
 186         case CA_RESET:
 187                 err = firesat_ca_reset(firesat);
 188                 break;
 189         case CA_GET_CAP:
 190                 err = firesat_ca_get_caps(arg);
 191                 break;
 192         case CA_GET_SLOT_INFO:
 193                 err = firesat_ca_get_slot_info(firesat, arg);
 194                 break;
 195         case CA_GET_MSG:
 196                 err = firesat_ca_get_msg(firesat, arg);
 197                 break;
 198         case CA_SEND_MSG:
 199                 err = firesat_ca_send_msg(firesat, arg);
 200                 break;
 201         default:
 202                 printk(KERN_INFO "%s: Unhandled ioctl, command: %u\n",__func__,
 203                        cmd);
 204                 err = -EOPNOTSUPP;
 205         }
 206
 207         /* FIXME Is this necessary? */
 208         avc_tuner_status(firesat, &info);
 209
 210         return err;
 211 }
 212
 213 static unsigned int firesat_ca_io_poll(struct file *file, poll_table *wait)
 214 {
 215         return POLLIN;
 216 }
 217
 218 static struct file_operations firesat_ca_fops = {
 219         .owner          = THIS_MODULE,
 220         .ioctl          = dvb_generic_ioctl,
 221         .open           = dvb_generic_open,
 222         .release        = dvb_generic_release,
 223         .poll           = firesat_ca_io_poll,
 224 };
 225
 226 static struct dvb_device firesat_ca = {
 227         .users          = 1,
 228         .readers        = 1,
 229         .writers        = 1,
 230         .fops           = &firesat_ca_fops,
 231         .kernel_ioctl   = firesat_ca_ioctl,
 232 };
 233
 234 int firesat_ca_register(struct firesat *firesat)
 235 {
 236         ANTENNA_INPUT_INFO info;
 237         int err;
 238
 239         if (avc_tuner_status(firesat, &info))
 240                 return -EINVAL;
 241
 242         if (!firesat_ca_ready(&info))
 243                 return -EFAULT;
 244
 245         err = dvb_register_device(&firesat->adapter, &firesat->cadev,
 246                                   &firesat_ca, firesat, DVB_DEVICE_CA);
 247
 248         if (info.CaApplicationInfo == 0)
 249                 printk(KERN_ERR "%s: CaApplicationInfo is not set.\n",
 250                        __func__);
 251         if (info.CaDateTimeRequest == 1)
 252                 avc_ca_get_time_date(firesat, &firesat->ca_time_interval);
 253
 254         return err;
 255 }
 256
 257 void firesat_ca_release(struct firesat *firesat)
 258 {
 259         if (firesat->cadev)
 260                 dvb_unregister_device(firesat->cadev);
 261 }