3.4. Digital TV Conditional Access kABI¶
- 
struct dvb_ca_en50221¶
- Structure describing a CA interface 
Definition:
struct dvb_ca_en50221 {
    struct module *owner;
    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);
    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);
    int (*read_data)(struct dvb_ca_en50221 *ca, int slot, u8 *ebuf, int ecount);
    int (*write_data)(struct dvb_ca_en50221 *ca, int slot, u8 *ebuf, int ecount);
    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);
    int (*poll_slot_status)(struct dvb_ca_en50221 *ca, int slot, int open);
    void *data;
    void *private;
};
Members
- owner
- the module owning this structure 
- read_attribute_mem
- function for reading attribute memory on the CAM 
- write_attribute_mem
- function for writing attribute memory on the CAM 
- read_cam_control
- function for reading the control interface on the CAM 
- write_cam_control
- function for reading the control interface on the CAM 
- read_data
- function for reading data (block mode) 
- write_data
- function for writing data (block mode) 
- slot_reset
- function to reset the CAM slot 
- slot_shutdown
- function to shutdown a CAM slot 
- slot_ts_enable
- function to enable the Transport Stream on a CAM slot 
- poll_slot_status
- function to poll slot status. Only necessary if DVB_CA_FLAG_EN50221_IRQ_CAMCHANGE is not set. 
- data
- private data, used by caller. 
- private
- Opaque data used by the dvb_ca core. Do not modify! 
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.
- 
void dvb_ca_en50221_camchange_irq(struct dvb_ca_en50221 *pubca, int slot, int change_type)¶
- A CAMCHANGE IRQ has occurred. 
Parameters
- struct dvb_ca_en50221 *pubca
- CA instance. 
- int slot
- Slot concerned. 
- int change_type
- One of the DVB_CA_CAMCHANGE_* values 
- 
void dvb_ca_en50221_camready_irq(struct dvb_ca_en50221 *pubca, int slot)¶
- A CAMREADY IRQ has occurred. 
Parameters
- struct dvb_ca_en50221 *pubca
- CA instance. 
- int slot
- Slot concerned. 
- 
void dvb_ca_en50221_frda_irq(struct dvb_ca_en50221 *ca, int slot)¶
- An FR or a DA IRQ has occurred. 
Parameters
- struct dvb_ca_en50221 *ca
- CA instance. 
- int slot
- Slot concerned. 
- 
int dvb_ca_en50221_init(struct dvb_adapter *dvb_adapter, struct dvb_ca_en50221 *ca, int flags, int slot_count)¶
- Initialise a new DVB CA device. 
Parameters
- struct dvb_adapter *dvb_adapter
- DVB adapter to attach the new CA device to. 
- struct dvb_ca_en50221 *ca
- The dvb_ca instance. 
- int flags
- Flags describing the CA device (DVB_CA_EN50221_FLAG_*). 
- int slot_count
- Number of slots supported. 
Description
return 0 on success, nonzero on failure
- 
void dvb_ca_en50221_release(struct dvb_ca_en50221 *ca)¶
- Release a DVB CA device. 
Parameters
- struct dvb_ca_en50221 *ca
- The associated dvb_ca instance.