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Regard whitespace Rev 3655 → Rev 3656

/kernel/trunk/bus/usb/ehci.inc
1045,15 → 1045,21
; this corresponds to 4001h bytes. If the requested size is
; greater, we should split the transfer into several descriptors.
; Boundaries to split must be multiples of endpoint transfer size
; to avoid short packets except in the end of the transfer,
; 4000h is always a good value.
; to avoid short packets except in the end of the transfer.
cmp [size], 4001h
jbe .lastpacket
; 2. While the remaining data cannot fit in one descriptor,
; allocate full descriptors (of maximal possible size).
mov edi, 4000h
; 2a. Calculate size of one descriptor: must be a multiple of transfer size
; and must be not greater than 4001h.
movzx ecx, word [ebx+ohci_pipe.Flags+2-sizeof.ohci_pipe]
mov eax, 4001h
xor edx, edx
mov edi, eax
div ecx
sub edi, edx
mov [packetSize], edi
.fullpackets:
cmp [size], edi
jbe .lastpacket
call ehci_alloc_packet
test eax, eax
jz .fail
1060,7 → 1066,8
mov [td], eax
add [buffer], edi
sub [size], edi
jmp .fullpackets
cmp [size], 4001h
ja .fullpackets
; 3. The remaining data can fit in one packet;
; allocate the last descriptor with size = size of remaining data.
.lastpacket:
/kernel/trunk/bus/usb/ohci.inc
1058,15 → 1058,22
; this corresponds to 1001h bytes. If the requested size is
; greater, we should split the transfer into several descriptors.
; Boundaries to split must be multiples of endpoint transfer size
; to avoid short packets except in the end of the transfer,
; 1000h is always a good value.
; to avoid short packets except in the end of the transfer.
cmp [size], 1001h
jbe .lastpacket
; 2. While the remaining data cannot fit in one packet,
; allocate page-sized descriptors.
mov edi, 1000h
; allocate full-sized descriptors.
; 2a. Calculate size of one descriptor: must be a multiple of transfer size
; and must be not greater than 1001h.
movzx ecx, word [ebx+ohci_pipe.Flags+2-sizeof.ohci_pipe]
mov eax, 1001h
xor edx, edx
mov edi, eax
div ecx
sub edi, edx
; 2b. Allocate in loop.
mov [packetSize], edi
.fullpackets:
cmp [size], edi
jbe .lastpacket
call ohci_alloc_packet
test eax, eax
jz .fail
1073,7 → 1080,8
mov [td], eax
add [buffer], edi
sub [size], edi
jmp .fullpackets
cmp [size], 1001h
ja .fullpackets
; 3. The remaining data can fit in one descriptor;
; allocate the last descriptor with size = size of remaining data.
.lastpacket:
/kernel/trunk/bus/usb/uhci.inc
20,9 → 20,8
USB_PID_OUT = 0E1h
; UHCI does not support an interrupt on root hub status change. We must poll
; the controller periodically. This is the period in timer ticks (10ms).
; We use the value 100 ms: it is valid value for USB hub poll rate (1-255 ms),
; small enough to be responsible to connect events and large enough to not
; load CPU too often.
; We use the value 100 ticks: it is small enough to be responsible to connect
; events and large enough to not load CPU too often.
UHCI_POLL_INTERVAL = 100
; the following constant is an invalid encoding for length fields in
; uhci_gtd; it is used to check whether an inactive TD has been
1718,9 → 1717,12
push eax
sub eax, sizeof.uhci_gtd
call get_phys_addr
; use Depth traversal unless this is the first TD in the transfer stage;
; for Control/Bulk pipes, use Depth traversal unless this is the first TD
; in the transfer stage;
; uhci_insert_transfer will set Depth traversal for the first TD and clear
; it in the last TD
test [ebx+usb_pipe.Type], 1
jnz @f
cmp ecx, [ebx+usb_pipe.LastTD]
jz @f
or eax, 4
1778,7 → 1780,10
or byte [ecx+uhci_gtd.ControlStatus+3-sizeof.uhci_gtd], 1 shl (24-24) ; set InterruptOnComplete bit
mov eax, [esp+4]
or byte [eax+uhci_gtd.ControlStatus+2-sizeof.uhci_gtd], 1 shl (23-16) ; set Active bit
test [ebx+usb_pipe.Type], 1
jnz @f
or byte [eax+uhci_gtd.NextTD-sizeof.uhci_gtd], 4 ; set Depth bit
@@:
ret
endp