Intravision/reactos
1
0
Fork 0
mirror of https://github.com/reactos/reactos.git synced 2024-12-28 01:55:19 +00:00
Code Issues Projects Releases Packages Wiki Activity

[USBPORT] Define constants for Transaction Translator.

Browse source
This commit is contained in:
Vadim Galyant 2017-11-27 16:03:20 +09:00 committed by Amine Khaldi
parent d4ff198c7c
commit 41f4814c44
1 changed files with 24 additions and 0 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

24
drivers/usb/usbport/usbport.h
View file

@ -430,6 +430,30 @@ typedef struct _TIMER_WORK_QUEUE_ITEM {
ULONG Context;
} TIMER_WORK_QUEUE_ITEM, *PTIMER_WORK_QUEUE_ITEM;
/* Transaction Translator */
/* See Chapter 5 - USB Data Flow Model and Chapter 11 - Hub Specification */
#define USB2_FRAMES 32
#define USB2_MICROFRAMES 8
#define USB2_MAX_MICROFRAMES (USB2_FRAMES * USB2_MICROFRAMES)
#define USB2_MAX_MICROFRAME_ALLOCATION 7000 // bytes
#define USB2_CONTROLLER_DELAY 100
#define USB2_FS_MAX_PERIODIC_ALLOCATION 1157 // ((12000 / 8 bits) * 0.9) / (7/6) - 90% max, and bits stuffing
#define USB2_FS_SOF_TIME 6
#define USB2_HUB_DELAY 30
#define USB2_MAX_FS_LS_TRANSACTIONS_IN_UFRAME 16
#define USB2_FS_RAW_BYTES_IN_MICROFRAME 188 // (12000 / 8 bits / USB2_MICROFRAMES) = 187,5. But we use "best case budget"
/* Overheads */
#define USB2_LS_INTERRUPT_OVERHEAD 117 // FS-bytes
#define USB2_FS_INTERRUPT_OVERHEAD 13
#define USB2_HS_INTERRUPT_OUT_OVERHEAD 45
#define USB2_HS_INTERRUPT_IN_OVERHEAD 25
#define USB2_FS_ISOCHRONOUS_OVERHEAD 9
#define USB2_HS_ISOCHRONOUS_OUT_OVERHEAD 38
#define USB2_HS_ISOCHRONOUS_IN_OVERHEAD 18
/* usbport.c */
NTSTATUS
NTAPI