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linux/drivers/media/dvb/firesat/firesat-ci.c
Henrik Kurelid df4846c352 firesat: update isochronous interface, add CI support 
I have finally managed to get the CI support for the card working. The
implementation is a bare minimum to get encrypted channels to work in
kaffeine. It works fine with my T/CI card. Now and then I get an AVC
timeout and have to retune a channel in order to get it to work. Once
the CAM seemed to hang so I needed to remove and insert it again. I.e.
there are a number of glitches.

The latest version contains the following changes:

  - Implemented the new hpsb iso interface so that data can be received
    from the card
  - Reduced some timers for demux setup which caused scanning to timeout
  - Added possibility to unload driver
  - Added support for getting C/N ratio
  - Added two debug parameters to the driver; ca_debug and
    avc_comm_debug.
  - Added CI support that works for me in kaffeine
  - Started working on CI MMI support. It now supports:
      o Enter menu
      o Receiving MMI objects
  - Added support for 64-bit platforms
  - Corrected DVB-C modulations problems

Signed-off-by: Henrik Kurelid <henrik@kurelid.se>
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de> (rebased, whitespace)
2009-02-24 14:51:26 +01:00

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/*
* FireSAT DVB driver
*
* Copyright (c) 2008 Henrik Kurelid <henrik@kurelid.se>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of
* the License, or (at your option) any later version.
*/
#include "firesat-ci.h"
#include "firesat.h"
#include "avc_api.h"
#include <linux/dvb/ca.h>
#include <dvbdev.h>
static unsigned int ca_debug = 0;
module_param(ca_debug, int, 0644);
MODULE_PARM_DESC(ca_debug, "debug logging of ca system, default is 0 (no)");
static int firesat_ca_ready(ANTENNA_INPUT_INFO *info)
{
if (ca_debug != 0)
printk("%s: CaMmi=%d, CaInit=%d, CaError=%d, CaDvb=%d, "
"CaModule=%d, CaAppInfo=%d, CaDateTime=%d, "
"CaPmt=%d\n", __func__, info->CaMmi,
info->CaInitializationStatus, info->CaErrorFlag,
info->CaDvbFlag, info->CaModulePresentStatus,
info->CaApplicationInfo,
info->CaDateTimeRequest, info->CaPmtReply);
return info->CaInitializationStatus == 1 &&
info->CaErrorFlag == 0 &&
info->CaDvbFlag == 1 &&
info->CaModulePresentStatus == 1;
}
static int firesat_get_ca_flags(ANTENNA_INPUT_INFO *info)
{
int flags = 0;
if (info->CaModulePresentStatus == 1)
flags |= CA_CI_MODULE_PRESENT;
if (info->CaInitializationStatus == 1 &&
info->CaErrorFlag == 0 &&
info->CaDvbFlag == 1)
flags |= CA_CI_MODULE_READY;
return flags;
}
static int firesat_ca_reset(struct firesat *firesat)
{
if (ca_debug)
printk(KERN_INFO "%s: ioctl CA_RESET\n", __func__);
if (avc_ca_reset(firesat))
return -EFAULT;
return 0;
}
static int firesat_ca_get_caps(struct firesat *firesat, void *arg)
{
struct ca_caps *cap_p = (struct ca_caps*)arg;
int err = 0;
cap_p->slot_num = 1;
cap_p->slot_type = CA_CI;
cap_p->descr_num = 1;
cap_p->descr_type = CA_ECD;
if (ca_debug)
printk(KERN_INFO "%s: ioctl CA_GET_CAP\n", __func__);
return err;
}
static int firesat_ca_get_slot_info(struct firesat *firesat, void *arg)
{
ANTENNA_INPUT_INFO info;
struct ca_slot_info *slot_p = (struct ca_slot_info*)arg;
if (ca_debug)
printk(KERN_INFO "%s: ioctl CA_GET_SLOT_INFO on slot %d.\n",
__func__, slot_p->num);
if (AVCTunerStatus(firesat, &info))
return -EFAULT;
if (slot_p->num == 0) {
slot_p->type = CA_CI;
slot_p->flags = firesat_get_ca_flags(&info);
}
else {
return -EFAULT;
}
return 0;
}
static int firesat_ca_app_info(struct firesat *firesat, void *arg)
{
struct ca_msg *reply_p = (struct ca_msg*)arg;
int i;
if (avc_ca_app_info(firesat, reply_p->msg, &reply_p->length))
return -EFAULT;
if (ca_debug) {
printk(KERN_INFO "%s: Creating TAG_APP_INFO message:",
__func__);
for (i = 0; i < reply_p->length; i++)
printk("0x%02X, ", (unsigned char)reply_p->msg[i]);
printk("\n");
}
return 0;
}
static int firesat_ca_info(struct firesat *firesat, void *arg)
{
struct ca_msg *reply_p = (struct ca_msg*)arg;
int i;
if (avc_ca_info(firesat, reply_p->msg, &reply_p->length))
return -EFAULT;
if (ca_debug) {
printk(KERN_INFO "%s: Creating TAG_CA_INFO message:",
__func__);
for (i = 0; i < reply_p->length; i++)
printk("0x%02X, ", (unsigned char)reply_p->msg[i]);
printk("\n");
}
return 0;
}
static int firesat_ca_get_mmi(struct firesat *firesat, void *arg)
{
struct ca_msg *reply_p = (struct ca_msg*)arg;
int i;
if (avc_ca_get_mmi(firesat, reply_p->msg, &reply_p->length))
return -EFAULT;
if (ca_debug) {
printk(KERN_INFO "%s: Creating MMI reply INFO message:",
__func__);
for (i = 0; i < reply_p->length; i++)
printk("0x%02X, ", (unsigned char)reply_p->msg[i]);
printk("\n");
}
return 0;
}
static int firesat_ca_get_msg(struct firesat *firesat, void *arg)
{
int err;
ANTENNA_INPUT_INFO info;
switch (firesat->ca_last_command) {
case TAG_APP_INFO_ENQUIRY:
err = firesat_ca_app_info(firesat, arg);
break;
case TAG_CA_INFO_ENQUIRY:
err = firesat_ca_info(firesat, arg);
break;
default:
if (AVCTunerStatus(firesat, &info))
err = -EFAULT;
else if (info.CaMmi == 1) {
err = firesat_ca_get_mmi(firesat, arg);
}
else {
printk(KERN_INFO "%s: Unhandled message 0x%08X\n",
__func__, firesat->ca_last_command);
err = -EFAULT;
}
}
firesat->ca_last_command = 0;
return err;
}
static int firesat_ca_pmt(struct firesat *firesat, void *arg)
{
struct ca_msg *msg_p = (struct ca_msg*)arg;
int data_pos;
if (msg_p->msg[3] & 0x80)
data_pos = (msg_p->msg[4] && 0x7F) + 4;
else
data_pos = 4;
if (avc_ca_pmt(firesat, &msg_p->msg[data_pos],
msg_p->length - data_pos))
return -EFAULT;
return 0;
}
static int firesat_ca_send_msg(struct firesat *firesat, void *arg)
{
int err;
struct ca_msg *msg_p = (struct ca_msg*)arg;
// Do we need a semaphore for this?
firesat->ca_last_command =
(msg_p->msg[0] << 16) + (msg_p->msg[1] << 8) + msg_p->msg[2];
switch (firesat->ca_last_command) {
case TAG_CA_PMT:
if (ca_debug != 0)
printk(KERN_INFO "%s: Message received: TAG_CA_PMT\n",
__func__);
err = firesat_ca_pmt(firesat, arg);
break;
case TAG_APP_INFO_ENQUIRY:
// This is all handled in ca_get_msg
if (ca_debug != 0)
printk(KERN_INFO "%s: Message received: "
"TAG_APP_INFO_ENQUIRY\n", __func__);
err = 0;
break;
case TAG_CA_INFO_ENQUIRY:
// This is all handled in ca_get_msg
if (ca_debug != 0)
printk(KERN_INFO "%s: Message received: "
"TAG_CA_APP_INFO_ENQUIRY\n", __func__);
err = 0;
break;
case TAG_ENTER_MENU:
if (ca_debug != 0)
printk(KERN_INFO "%s: Entering CA menu.\n", __func__);
err = avc_ca_enter_menu(firesat);
break;
default:
printk(KERN_ERR "%s: Unhandled unknown message 0x%08X\n",
__func__, firesat->ca_last_command);
err = -EFAULT;
}
return err;
}
static int firesat_ca_ioctl(struct inode *inode, struct file *file,
unsigned int cmd, void *arg)
{
struct dvb_device* dvbdev = (struct dvb_device*) file->private_data;
struct firesat *firesat = dvbdev->priv;
int err;
ANTENNA_INPUT_INFO info;
switch(cmd) {
case CA_RESET:
err = firesat_ca_reset(firesat);
break;
case CA_GET_CAP:
err = firesat_ca_get_caps(firesat, arg);
break;
case CA_GET_SLOT_INFO:
err = firesat_ca_get_slot_info(firesat, arg);
break;
case CA_GET_MSG:
err = firesat_ca_get_msg(firesat, arg);
break;
case CA_SEND_MSG:
err = firesat_ca_send_msg(firesat, arg);
break;
default:
printk(KERN_INFO "%s: Unhandled ioctl, command: %u\n",__func__,
cmd);
err = -EOPNOTSUPP;
}
if (AVCTunerStatus(firesat, &info))
return err;
firesat_ca_ready(&info);
return err;
}
static int firesat_get_date_time_request(struct firesat *firesat)
{
if (ca_debug)
printk(KERN_INFO "%s: Retrieving Time/Date request\n",
__func__);
if (avc_ca_get_time_date(firesat, &firesat->ca_time_interval))
return -EFAULT;
if (ca_debug)
printk(KERN_INFO "%s: Time/Date interval is %d\n",
__func__, firesat->ca_time_interval);
return 0;
}
static int firesat_ca_io_open(struct inode *inode, struct file *file)
{
if (ca_debug != 0)
printk(KERN_INFO "%s\n",__func__);
return dvb_generic_open(inode, file);
}
static int firesat_ca_io_release(struct inode *inode, struct file *file)
{
if (ca_debug != 0)
printk(KERN_INFO "%s\n",__func__);
return dvb_generic_release(inode, file);
}
static unsigned int firesat_ca_io_poll(struct file *file, poll_table *wait)
{
if (ca_debug != 0)
printk(KERN_INFO "%s\n",__func__);
return POLLIN;
}
static struct file_operations firesat_ca_fops = {
.owner = THIS_MODULE,
.read = NULL, // There is no low level read anymore
.write = NULL, // There is no low level write anymore
.ioctl = dvb_generic_ioctl,
.open = firesat_ca_io_open,
.release = firesat_ca_io_release,
.poll = firesat_ca_io_poll,
};
static struct dvb_device firesat_ca = {
.priv = NULL,
.users = 1,
.readers = 1,
.writers = 1,
.fops = &firesat_ca_fops,
.kernel_ioctl = firesat_ca_ioctl,
};
int firesat_ca_init(struct firesat *firesat)
{
int err;
ANTENNA_INPUT_INFO info;
if (AVCTunerStatus(firesat, &info))
return -EINVAL;
if (firesat_ca_ready(&info)) {
err = dvb_register_device(firesat->adapter,
&firesat->cadev,
&firesat_ca, firesat,
DVB_DEVICE_CA);
if (info.CaApplicationInfo == 0)
printk(KERN_ERR "%s: CaApplicationInfo is not set.\n",
__func__);
if (info.CaDateTimeRequest == 1)
firesat_get_date_time_request(firesat);
}
else
err = -EFAULT;
return err;
}
void firesat_ca_release(struct firesat *firesat)
{
if (firesat->cadev)
dvb_unregister_device(firesat->cadev);
}
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