dvb_ca_en50221.h

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/*
 * dvb_ca.h: generic DVB functions for EN50221 CA interfaces
 *
 * Copyright (C) 2004 Andrew de Quincey
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public License
 * as published by the Free Software Foundation; either version 2.1
 * of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 */

#ifndef _DVB_CA_EN50221_H_
#define _DVB_CA_EN50221_H_

#include <linux/list.h>
#include <linux/dvb/ca.h>

#include "dvbdev.h"

#define DVB_CA_EN50221_POLL_CAM_PRESENT 1
#define DVB_CA_EN50221_POLL_CAM_CHANGED 2
#define DVB_CA_EN50221_POLL_CAM_READY       4

#define DVB_CA_EN50221_FLAG_IRQ_CAMCHANGE   1
#define DVB_CA_EN50221_FLAG_IRQ_FR      2
#define DVB_CA_EN50221_FLAG_IRQ_DA      4

#define DVB_CA_EN50221_CAMCHANGE_REMOVED        0
#define DVB_CA_EN50221_CAMCHANGE_INSERTED       1



/* Structure describing a CA interface */
struct dvb_ca_en50221 {

    /* the module owning this structure */
    struct module* owner;

    /* NOTE: the read_*, write_* and poll_slot_status functions will be
     * called for different slots concurrently and need to use locks where
     * and if appropriate. There will be no concurrent access to one slot.
     */

    /* functions for accessing attribute memory on the CAM */
    int (*read_attribute_mem)(struct dvb_ca_en50221* ca, int slot, int address);
    int (*write_attribute_mem)(struct dvb_ca_en50221* ca, int slot, int address, u8 value);

    /* functions for accessing the control interface on the CAM */
    int (*read_cam_control)(struct dvb_ca_en50221* ca, int slot, u8 address);
    int (*write_cam_control)(struct dvb_ca_en50221* ca, int slot, u8 address, u8 value);

    /* Functions for controlling slots */
    int (*slot_reset)(struct dvb_ca_en50221* ca, int slot);
    int (*slot_shutdown)(struct dvb_ca_en50221* ca, int slot);
    int (*slot_ts_enable)(struct dvb_ca_en50221* ca, int slot);

    /*
    * Poll slot status.
    * Only necessary if DVB_CA_FLAG_EN50221_IRQ_CAMCHANGE is not set
    */
    int (*poll_slot_status)(struct dvb_ca_en50221* ca, int slot, int open);

    /* private data, used by caller */
    void* data;

    /* Opaque data used by the dvb_ca core. Do not modify! */
    void* private;
};




/* ******************************************************************************** */
/* Functions for reporting IRQ events */

void dvb_ca_en50221_camchange_irq(struct dvb_ca_en50221* pubca, int slot, int change_type);

void dvb_ca_en50221_camready_irq(struct dvb_ca_en50221* pubca, int slot);

void dvb_ca_en50221_frda_irq(struct dvb_ca_en50221* ca, int slot);



/* ******************************************************************************** */
/* Initialisation/shutdown functions */

extern int dvb_ca_en50221_init(struct dvb_adapter *dvb_adapter, struct dvb_ca_en50221* ca, int flags, int slot_count);

extern void dvb_ca_en50221_release(struct dvb_ca_en50221* ca);



#endif