transfer_descriptor.h File Reference

UHCI driver. More...

#include <mem.h>
#include <usb/usb.h>
#include "link_pointer.h"

Go to the source code of this file.

Data Structures
struct	transfer_descriptor
	Transfer Descriptor, defined in UHCI design guide p. More...
Defines
#define	TD_DEVICE_ADDRESS_MASK   0x7f
#define	TD_DEVICE_ADDRESS_POS   8
#define	TD_DEVICE_DATA_TOGGLE_ONE_FLAG   (1 << 19)
#define	TD_DEVICE_ENDPOINT_MASK   0xf
#define	TD_DEVICE_ENDPOINT_POS   15
#define	TD_DEVICE_MAXLEN_MASK   0x7ff
#define	TD_DEVICE_MAXLEN_POS   21
#define	TD_DEVICE_PID_MASK   0xff
#define	TD_DEVICE_PID_POS   0
#define	TD_DEVICE_RESERVED_FLAG   (1 << 20)
#define	TD_STATUS_ACTLEN_MASK   0x7ff
#define	TD_STATUS_ACTLEN_POS   0
#define	TD_STATUS_ERROR_ACTIVE   (1 << 23)
#define	TD_STATUS_ERROR_BABBLE   (1 << 20)
#define	TD_STATUS_ERROR_BIT_STUFF   (1 << 17)
#define	TD_STATUS_ERROR_BUFFER   (1 << 21)
#define	TD_STATUS_ERROR_COUNT_MASK   0x3
#define	TD_STATUS_ERROR_COUNT_POS   27
#define	TD_STATUS_ERROR_CRC   (1 << 18)
#define	TD_STATUS_ERROR_MASK   0xff
#define	TD_STATUS_ERROR_NAK   (1 << 19)
#define	TD_STATUS_ERROR_POS   16
#define	TD_STATUS_ERROR_RESERVED   (1 << 16)
#define	TD_STATUS_ERROR_STALLED   (1 << 22)
#define	TD_STATUS_IOC_FLAG   (1 << 24)
#define	TD_STATUS_ISOCHRONOUS_FLAG   (1 << 25)
#define	TD_STATUS_LOW_SPEED_FLAG   (1 << 26)
#define	TD_STATUS_RESERVED_MASK   0xc000f800
#define	TD_STATUS_SPD_FLAG   (1 << 29)
Typedefs
typedef transfer_descriptor	td_t
	Transfer Descriptor, defined in UHCI design guide p.
Functions
static size_t	td_act_size (td_t *instance)
	Helper function for parsing actual size out of TD.
void	td_init (td_t *instance, int err_count, size_t size, bool toggle, bool iso, bool low_speed, usb_target_t target, usb_packet_id pid, void *buffer, td_t *next)
	Initialize Transfer Descriptor.
static bool	td_is_active (td_t *instance)
	Helper function for parsing value of active bit.
static bool	td_is_short (td_t *instance)
	Check whether less than max data were received on SPD marked transfer.
void	td_print_status (td_t *instance)
	Print values in status field (dw1) in a human readable way.
static void	td_set_ioc (td_t *instance)
	Helper function for setting IOC bit.
int	td_status (td_t *instance)
	Convert TD status into standard error code.
static int	td_toggle (td_t *instance)
	Helper function for parsing value of toggle bit.

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Detailed Description

UHCI driver.

Definition in file transfer_descriptor.h.

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