drivers/media/dvb/firewire/firedtv-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/device.h>
  14 #include <linux/dvb/ca.h>
  15 #include <linux/fs.h>
  16 #include <linux/module.h>
  17
  18 #include <dvbdev.h>
  19
  20 #include "firedtv.h"
  21
  22 #define EN50221_TAG_APP_INFO_ENQUIRY    0x9f8020
  23 #define EN50221_TAG_CA_INFO_ENQUIRY     0x9f8030
  24 #define EN50221_TAG_CA_PMT              0x9f8032
  25 #define EN50221_TAG_ENTER_MENU          0x9f8022
  26
  27 static int fdtv_ca_ready(struct firedtv_tuner_status *stat)
  28 {
  29         return stat->ca_initialization_status   == 1 &&
  30                stat->ca_error_flag              == 0 &&
  31                stat->ca_dvb_flag                == 1 &&
  32                stat->ca_module_present_status   == 1;
  33 }
  34
  35 static int fdtv_get_ca_flags(struct firedtv_tuner_status *stat)
  36 {
  37         int flags = 0;
  38
  39         if (stat->ca_module_present_status == 1)
  40                 flags |= CA_CI_MODULE_PRESENT;
  41         if (stat->ca_initialization_status == 1 &&
  42             stat->ca_error_flag            == 0 &&
  43             stat->ca_dvb_flag              == 1)
  44                 flags |= CA_CI_MODULE_READY;
  45         return flags;
  46 }
  47
  48 static int fdtv_ca_reset(struct firedtv *fdtv)
  49 {
  50         return avc_ca_reset(fdtv) ? -EFAULT : 0;
  51 }
  52
  53 static int fdtv_ca_get_caps(void *arg)
  54 {
  55         struct ca_caps *cap = arg;
  56
  57         cap->slot_num = 1;
  58         cap->slot_type = CA_CI;
  59         cap->descr_num = 1;
  60         cap->descr_type = CA_ECD;
  61         return 0;
  62 }
  63
  64 static int fdtv_ca_get_slot_info(struct firedtv *fdtv, void *arg)
  65 {
  66         struct firedtv_tuner_status stat;
  67         struct ca_slot_info *slot = arg;
  68
  69         if (avc_tuner_status(fdtv, &stat))
  70                 return -EFAULT;
  71
  72         if (slot->num != 0)
  73                 return -EFAULT;
  74
  75         slot->type = CA_CI;
  76         slot->flags = fdtv_get_ca_flags(&stat);
  77         return 0;
  78 }
  79
  80 static int fdtv_ca_app_info(struct firedtv *fdtv, void *arg)
  81 {
  82         struct ca_msg *reply = arg;
  83
  84         return avc_ca_app_info(fdtv, reply->msg, &reply->length) ? -EFAULT : 0;
  85 }
  86
  87 static int fdtv_ca_info(struct firedtv *fdtv, void *arg)
  88 {
  89         struct ca_msg *reply = arg;
  90
  91         return avc_ca_info(fdtv, reply->msg, &reply->length) ? -EFAULT : 0;
  92 }
  93
  94 static int fdtv_ca_get_mmi(struct firedtv *fdtv, void *arg)
  95 {
  96         struct ca_msg *reply = arg;
  97
  98         return avc_ca_get_mmi(fdtv, reply->msg, &reply->length) ? -EFAULT : 0;
  99 }
 100
 101 static int fdtv_ca_get_msg(struct firedtv *fdtv, void *arg)
 102 {
 103         struct firedtv_tuner_status stat;
 104         int err;
 105
 106         switch (fdtv->ca_last_command) {
 107         case EN50221_TAG_APP_INFO_ENQUIRY:
 108                 err = fdtv_ca_app_info(fdtv, arg);
 109                 break;
 110         case EN50221_TAG_CA_INFO_ENQUIRY:
 111                 err = fdtv_ca_info(fdtv, arg);
 112                 break;
 113         default:
 114                 if (avc_tuner_status(fdtv, &stat))
 115                         err = -EFAULT;
 116                 else if (stat.ca_mmi == 1)
 117                         err = fdtv_ca_get_mmi(fdtv, arg);
 118                 else {
 119                         dev_info(fdtv->device, "unhandled CA message 0x%08x\n",
 120                                  fdtv->ca_last_command);
 121                         err = -EFAULT;
 122                 }
 123         }
 124         fdtv->ca_last_command = 0;
 125         return err;
 126 }
 127
 128 static int fdtv_ca_pmt(struct firedtv *fdtv, void *arg)
 129 {
 130         struct ca_msg *msg = arg;
 131         int data_pos;
 132         int data_length;
 133         int i;
 134
 135         data_pos = 4;
 136         if (msg->msg[3] & 0x80) {
 137                 data_length = 0;
 138                 for (i = 0; i < (msg->msg[3] & 0x7f); i++)
 139                         data_length = (data_length << 8) + msg->msg[data_pos++];
 140         } else {
 141                 data_length = msg->msg[3];
 142         }
 143
 144         return avc_ca_pmt(fdtv, &msg->msg[data_pos], data_length) ? -EFAULT : 0;
 145 }
 146
 147 static int fdtv_ca_send_msg(struct firedtv *fdtv, void *arg)
 148 {
 149         struct ca_msg *msg = arg;
 150         int err;
 151
 152         /* Do we need a semaphore for this? */
 153         fdtv->ca_last_command =
 154                 (msg->msg[0] << 16) + (msg->msg[1] << 8) + msg->msg[2];
 155         switch (fdtv->ca_last_command) {
 156         case EN50221_TAG_CA_PMT:
 157                 err = fdtv_ca_pmt(fdtv, arg);
 158                 break;
 159         case EN50221_TAG_APP_INFO_ENQUIRY:
 160                 /* handled in ca_get_msg */
 161                 err = 0;
 162                 break;
 163         case EN50221_TAG_CA_INFO_ENQUIRY:
 164                 /* handled in ca_get_msg */
 165                 err = 0;
 166                 break;
 167         case EN50221_TAG_ENTER_MENU:
 168                 err = avc_ca_enter_menu(fdtv);
 169                 break;
 170         default:
 171                 dev_err(fdtv->device, "unhandled CA message 0x%08x\n",
 172                         fdtv->ca_last_command);
 173                 err = -EFAULT;
 174         }
 175         return err;
 176 }
 177
 178 static int fdtv_ca_ioctl(struct file *file, unsigned int cmd, void *arg)
 179 {
 180         struct dvb_device *dvbdev = file->private_data;
 181         struct firedtv *fdtv = dvbdev->priv;
 182         struct firedtv_tuner_status stat;
 183         int err;
 184
 185         switch (cmd) {
 186         case CA_RESET:
 187                 err = fdtv_ca_reset(fdtv);
 188                 break;
 189         case CA_GET_CAP:
 190                 err = fdtv_ca_get_caps(arg);
 191                 break;
 192         case CA_GET_SLOT_INFO:
 193                 err = fdtv_ca_get_slot_info(fdtv, arg);
 194                 break;
 195         case CA_GET_MSG:
 196                 err = fdtv_ca_get_msg(fdtv, arg);
 197                 break;
 198         case CA_SEND_MSG:
 199                 err = fdtv_ca_send_msg(fdtv, arg);
 200                 break;
 201         default:
 202                 dev_info(fdtv->device, "unhandled CA ioctl %u\n", cmd);
 203                 err = -EOPNOTSUPP;
 204         }
 205
 206         /* FIXME Is this necessary? */
 207         avc_tuner_status(fdtv, &stat);
 208
 209         return err;
 210 }
 211
 212 static unsigned int fdtv_ca_io_poll(struct file *file, poll_table *wait)
 213 {
 214         return POLLIN;
 215 }
 216
 217 static const struct file_operations fdtv_ca_fops = {
 218         .owner          = THIS_MODULE,
 219         .unlocked_ioctl = dvb_generic_ioctl,
 220         .open           = dvb_generic_open,
 221         .release        = dvb_generic_release,
 222         .poll           = fdtv_ca_io_poll,
 223         .llseek         = noop_llseek,
 224 };
 225
 226 static struct dvb_device fdtv_ca = {
 227         .users          = 1,
 228         .readers        = 1,
 229         .writers        = 1,
 230         .fops           = &fdtv_ca_fops,
 231         .kernel_ioctl   = fdtv_ca_ioctl,
 232 };
 233
 234 int fdtv_ca_register(struct firedtv *fdtv)
 235 {
 236         struct firedtv_tuner_status stat;
 237         int err;
 238
 239         if (avc_tuner_status(fdtv, &stat))
 240                 return -EINVAL;
 241
 242         if (!fdtv_ca_ready(&stat))
 243                 return -EFAULT;
 244
 245         err = dvb_register_device(&fdtv->adapter, &fdtv->cadev,
 246                                   &fdtv_ca, fdtv, DVB_DEVICE_CA);
 247
 248         if (stat.ca_application_info == 0)
 249                 dev_err(fdtv->device, "CaApplicationInfo is not set\n");
 250         if (stat.ca_date_time_request == 1)
 251                 avc_ca_get_time_date(fdtv, &fdtv->ca_time_interval);
 252
 253         return err;
 254 }
 255
 256 void fdtv_ca_release(struct firedtv *fdtv)
 257 {
 258         if (fdtv->cadev)
 259                 dvb_unregister_device(fdtv->cadev);
 260 }