2.4. Digital TV Conditional Access kABI¶
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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.
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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
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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.
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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.
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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
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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.