Joybus Subsystem. More...

Data Structures
struct	joybus_msg_t
	A message to be sent to JoyBus, with its completion callback. More...

Macros
#define	MAX_JOYBUS_MSGS 8
	Maximum number of pending joybus messages.

SI status register bit definitions
#define	SI_STATUS_DMA_BUSY ( 1 << 0 )
	SI DMA busy.

#define	SI_STATUS_IO_BUSY ( 1 << 1 )
	SI IO busy.

Joybus internal state machine values

#define	JOYBUS_STATE_IDLE 0
	Joybus state: idle (no pending messages)

#define	JOYBUS_STATE_SENDING 1
	JoyBus state: sending a message to PIF.

#define	JOYBUS_STATE_RECEIVING 2
	JoyBus state: receiving a reply from PIF.

Functions
void	__joybus_init (void)
	Initialize the joybus subsystem.

void	joybus_exec_async (const void input, void(callback)(uint64_t output, void ctx), void *ctx)
	Execute an asynchronous joybus message. More...

void	joybus_exec (const void input, void output)
	Write a 64-byte block of data to the PIF and read the 64-byte result. More...

Detailed Description

Joybus Subsystem.

Data Structures