851 lines
30 KiB
PHP
851 lines
30 KiB
PHP
; Functions for USB pipe manipulation: opening/closing, sending data etc.
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;
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USB_STDCALL_VERIFY = 1
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macro stdcall_verify [arg]
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{
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common
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if USB_STDCALL_VERIFY
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pushad
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stdcall arg
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call verify_regs
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popad
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else
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stdcall arg
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end if
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}
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if USB_STDCALL_VERIFY
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STDCALL_VERIFY_EXTRA = 20h
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else
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STDCALL_VERIFY_EXTRA = 0
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end if
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; Initialization of usb_static_ep structure,
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; called from controller-specific initialization; edi -> usb_static_ep
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proc usb_init_static_endpoint
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mov [edi+usb_static_ep.NextVirt], edi
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mov [edi+usb_static_ep.PrevVirt], edi
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ret
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endp
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; Part of API for drivers, see documentation for USBOpenPipe.
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proc usb_open_pipe stdcall uses ebx esi edi,\
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config_pipe:dword, endpoint:dword, maxpacket:dword, type:dword, interval:dword
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locals
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tt_vars rd 24 ; should be enough for ehci_select_tt_interrupt_list
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targetsmask dd ? ; S-Mask for USB2
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bandwidth dd ?
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target dd ?
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endl
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; 1. Verify type of pipe: it must be one of *_PIPE constants.
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; Isochronous pipes are not supported yet.
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mov eax, [type]
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cmp eax, INTERRUPT_PIPE
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ja .badtype
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cmp al, ISOCHRONOUS_PIPE
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jnz .goodtype
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.badtype:
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dbgstr 'unsupported type of USB pipe'
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jmp .return0
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.goodtype:
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; 2. Allocate memory for pipe and transfer queue.
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; Empty transfer queue consists of one inactive TD.
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mov ebx, [config_pipe]
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mov esi, [ebx+usb_pipe.Controller]
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mov edx, [esi+usb_controller.HardwareFunc]
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call [edx+usb_hardware_func.AllocPipe]
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test eax, eax
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jz .nothing
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mov edi, eax
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mov edx, [esi+usb_controller.HardwareFunc]
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call [edx+usb_hardware_func.AllocTD]
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test eax, eax
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jz .free_and_return0
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; 3. Initialize transfer queue: pointer to transfer descriptor,
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; pointers in transfer descriptor, queue lock.
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mov [edi+usb_pipe.LastTD], eax
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mov [eax+usb_gtd.NextVirt], eax
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mov [eax+usb_gtd.PrevVirt], eax
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mov [eax+usb_gtd.Pipe], edi
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lea ecx, [edi+usb_pipe.Lock]
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call mutex_init
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; 4. Initialize software part of pipe structure, except device-related fields.
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mov al, byte [type]
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mov [edi+usb_pipe.Type], al
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xor eax, eax
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mov [edi+usb_pipe.Flags], al
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mov [edi+usb_pipe.DeviceData], eax
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mov [edi+usb_pipe.Controller], esi
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or [edi+usb_pipe.NextWait], -1
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; 5. Initialize device-related fields:
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; for zero endpoint, set .NextSibling = .PrevSibling = this;
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; for other endpoins, copy device data, take the lock guarding pipe list
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; for the device and verify that disconnect processing has not yet started
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; for the device. (Since disconnect processing also takes that lock,
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; either it has completed or it will not start until we release the lock.)
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; Note: usb_device_disconnected should not see the new pipe until
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; initialization is complete, so that lock will be held during next steps
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; (disconnect processing should either not see it at all, or see fully
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; initialized pipe).
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cmp [endpoint], eax
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jz .zero_endpoint
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mov ecx, [ebx+usb_pipe.DeviceData]
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mov [edi+usb_pipe.DeviceData], ecx
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call mutex_lock
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test [ebx+usb_pipe.Flags], USB_FLAG_CLOSED
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jz .common
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.fail:
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; If disconnect processing has completed, unlock the mutex, free memory
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; allocated in step 2 and return zero.
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call mutex_unlock
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mov edx, [esi+usb_controller.HardwareFunc]
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stdcall [edx+usb_hardware_func.FreeTD], [edi+usb_pipe.LastTD]
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.free_and_return0:
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mov edx, [esi+usb_controller.HardwareFunc]
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stdcall [edx+usb_hardware_func.FreePipe], edi
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.return0:
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xor eax, eax
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jmp .nothing
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.zero_endpoint:
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mov [edi+usb_pipe.NextSibling], edi
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mov [edi+usb_pipe.PrevSibling], edi
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.common:
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; 6. Initialize hardware part of pipe structure.
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; 6a. Acquire the corresponding mutex.
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lea ecx, [esi+usb_controller.ControlLock]
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cmp [type], BULK_PIPE
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jb @f ; control pipe
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lea ecx, [esi+usb_controller.BulkLock]
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jz @f ; bulk pipe
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lea ecx, [esi+usb_controller.PeriodicLock]
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@@:
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call mutex_lock
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; 6b. Let the controller-specific code do its job.
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push ecx
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mov edx, [esi+usb_controller.HardwareFunc]
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mov eax, [edi+usb_pipe.LastTD]
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mov ecx, [config_pipe]
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call [edx+usb_hardware_func.InitPipe]
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pop ecx
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; 6c. Release the mutex.
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push eax
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call mutex_unlock
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pop eax
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; 6d. If controller-specific code indicates failure,
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; release the lock taken in step 5, free memory allocated in step 2
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; and return zero.
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test eax, eax
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jz .fail
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; 7. The pipe is initialized. If this is not the first pipe for the device,
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; insert it to the tail of pipe list for the device,
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; increment number of pipes,
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; release the lock taken at step 5.
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mov ecx, [edi+usb_pipe.DeviceData]
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test ecx, ecx
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jz @f
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mov eax, [ebx+usb_pipe.PrevSibling]
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mov [edi+usb_pipe.NextSibling], ebx
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mov [edi+usb_pipe.PrevSibling], eax
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mov [ebx+usb_pipe.PrevSibling], edi
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mov [eax+usb_pipe.NextSibling], edi
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inc [ecx+usb_device_data.NumPipes]
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call mutex_unlock
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@@:
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; 8. Return pointer to usb_pipe.
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mov eax, edi
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.nothing:
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ret
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endp
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; This procedure is called several times during initial device configuration,
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; when usb_device_data structure is reallocated.
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; It (re)initializes all pointers in usb_device_data.
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; ebx -> usb_pipe
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proc usb_reinit_pipe_list
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push eax
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; 1. (Re)initialize the lock guarding pipe list.
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mov ecx, [ebx+usb_pipe.DeviceData]
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call mutex_init
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; 2. Initialize list of opened pipes: two entries, the head and ebx.
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add ecx, usb_device_data.OpenedPipeList - usb_pipe.NextSibling
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mov [ecx+usb_pipe.NextSibling], ebx
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mov [ecx+usb_pipe.PrevSibling], ebx
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mov [ebx+usb_pipe.NextSibling], ecx
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mov [ebx+usb_pipe.PrevSibling], ecx
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; 3. Initialize list of closed pipes: empty list, only the head is present.
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add ecx, usb_device_data.ClosedPipeList - usb_device_data.OpenedPipeList
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mov [ecx+usb_pipe.NextSibling], ecx
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mov [ecx+usb_pipe.PrevSibling], ecx
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pop eax
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ret
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endp
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; Part of API for drivers, see documentation for USBClosePipe.
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proc usb_close_pipe
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push ebx esi ; save used registers to be stdcall
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virtual at esp
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rd 2 ; saved registers
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dd ? ; return address
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.pipe dd ?
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end virtual
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; 1. Lock the pipe list for the device.
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mov ebx, [.pipe]
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mov esi, [ebx+usb_pipe.Controller]
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mov ecx, [ebx+usb_pipe.DeviceData]
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call mutex_lock
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; 2. Set the flag "the driver has abandoned this pipe, free it at any time".
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lea ecx, [ebx+usb_pipe.Lock]
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call mutex_lock
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or [ebx+usb_pipe.Flags], USB_FLAG_CAN_FREE
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call mutex_unlock
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; 3. Call the worker function.
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call usb_close_pipe_nolock
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; 4. Unlock the pipe list for the device.
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mov ecx, [ebx+usb_pipe.DeviceData]
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call mutex_unlock
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; 5. Wakeup the USB thread so that it can proceed with releasing that pipe.
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push edi
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call usb_wakeup
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pop edi
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; 6. Return.
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pop esi ebx ; restore used registers to be stdcall
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retn 4
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endp
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; Worker function for pipe closing. Called by usb_close_pipe API and
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; from disconnect processing.
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; The lock guarding pipe list for the device should be held by the caller.
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; ebx -> usb_pipe, esi -> usb_controller
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proc usb_close_pipe_nolock
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; 1. Set the flag "pipe is closed, ignore new transfers".
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; If it was already set, do nothing.
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lea ecx, [ebx+usb_pipe.Lock]
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call mutex_lock
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bts dword [ebx+usb_pipe.Flags], USB_FLAG_CLOSED_BIT
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jc .closed
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call mutex_unlock
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; 2. Remove the pipe from the list of opened pipes.
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mov eax, [ebx+usb_pipe.NextSibling]
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mov edx, [ebx+usb_pipe.PrevSibling]
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mov [eax+usb_pipe.PrevSibling], edx
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mov [edx+usb_pipe.NextSibling], eax
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; 3. Unlink the pipe from hardware structures.
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; 3a. Acquire the corresponding lock.
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lea edx, [esi+usb_controller.WaitPipeListAsync]
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lea ecx, [esi+usb_controller.ControlLock]
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cmp [ebx+usb_pipe.Type], BULK_PIPE
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jb @f ; control pipe
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lea ecx, [esi+usb_controller.BulkLock]
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jz @f ; bulk pipe
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add edx, usb_controller.WaitPipeListPeriodic - usb_controller.WaitPipeListAsync
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lea ecx, [esi+usb_controller.PeriodicLock]
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@@:
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push edx
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call mutex_lock
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push ecx
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; 3b. Let the controller-specific code do its job.
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test [ebx+usb_pipe.Flags], USB_FLAG_DISABLED
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jnz @f
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mov eax, [esi+usb_controller.HardwareFunc]
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call [eax+usb_hardware_func.DisablePipe]
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@@:
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mov eax, [esi+usb_controller.HardwareFunc]
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call [eax+usb_hardware_func.UnlinkPipe]
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mov edx, [ebx+usb_pipe.NextVirt]
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mov eax, [ebx+usb_pipe.PrevVirt]
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mov [edx+usb_pipe.PrevVirt], eax
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mov [eax+usb_pipe.NextVirt], edx
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; 3c. Release the corresponding lock.
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pop ecx
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call mutex_unlock
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; 4. Put the pipe into wait queue.
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pop edx
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cmp [ebx+usb_pipe.NextWait], -1
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jz .insert_new
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or [ebx+usb_pipe.Flags], USB_FLAG_EXTRA_WAIT
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jmp .inserted
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.insert_new:
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mov eax, [edx]
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mov [ebx+usb_pipe.NextWait], eax
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mov [edx], ebx
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.inserted:
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; 5. Return.
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ret
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.closed:
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call mutex_unlock
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xor eax, eax
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ret
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endp
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; This procedure is called when all transfers are aborted
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; either due to call to usb_abort_pipe or due to pipe closing.
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; It notifies all callbacks and frees all transfer descriptors.
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; ebx -> usb_pipe, esi -> usb_controller, edi -> usb_hardware_func
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; three stack parameters: status code for callback functions
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; and descriptors where to start and stop.
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proc usb_pipe_aborted
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virtual at esp
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dd ? ; return address
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.status dd ? ; USB_STATUS_CLOSED or USB_STATUS_CANCELLED
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.first_td dd ?
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.last_td dd ?
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end virtual
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; Loop over all transfers, calling the driver with the given status
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; and freeing all descriptors except the last one.
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.loop:
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mov edx, [.first_td]
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cmp edx, [.last_td]
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jz .done
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mov ecx, [edx+usb_gtd.Callback]
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test ecx, ecx
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jz .no_callback
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stdcall_verify ecx, ebx, [.status+12+STDCALL_VERIFY_EXTRA], \
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[edx+usb_gtd.Buffer], 0, [edx+usb_gtd.UserData]
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mov edx, [.first_td]
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.no_callback:
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mov eax, [edx+usb_gtd.NextVirt]
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mov [.first_td], eax
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stdcall [edi+usb_hardware_func.FreeTD], edx
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jmp .loop
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.done:
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ret 12
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endp
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; This procedure is called when a pipe with USB_FLAG_CLOSED is removed from the
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; corresponding wait list. It means that the hardware has fully forgot about it.
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; ebx -> usb_pipe, esi -> usb_controller
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proc usb_pipe_closed
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push edi
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mov edi, [esi+usb_controller.HardwareFunc]
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; 1. Notify all registered callbacks with status USB_STATUS_CLOSED, if any,
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; and free all transfer descriptors, including the last one.
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lea ecx, [ebx+usb_pipe.Lock]
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call mutex_lock
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mov edx, [ebx+usb_pipe.LastTD]
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test edx, edx
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jz .no_transfer
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mov eax, [edx+usb_gtd.NextVirt]
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push edx
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push eax
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call mutex_unlock
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push USB_STATUS_CLOSED
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call usb_pipe_aborted
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; It is safe to free LastTD here:
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; usb_*_transfer_async do not enqueue new transfers if USB_FLAG_CLOSED is set.
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stdcall [edi+usb_hardware_func.FreeTD], [ebx+usb_pipe.LastTD]
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jmp @f
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.no_transfer:
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call mutex_unlock
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@@:
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; 2. Decrement number of pipes for the device.
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; If this pipe is the last pipe, go to 5.
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mov ecx, [ebx+usb_pipe.DeviceData]
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call mutex_lock
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dec [ecx+usb_device_data.NumPipes]
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jz .last_pipe
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call mutex_unlock
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; 3. If the flag "the driver has abandoned this pipe" is set,
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; free memory and return.
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test [ebx+usb_pipe.Flags], USB_FLAG_CAN_FREE
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jz .nofree
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stdcall [edi+usb_hardware_func.FreePipe], ebx
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pop edi
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ret
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; 4. Otherwise, add it to the list of closed pipes and return.
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.nofree:
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add ecx, usb_device_data.ClosedPipeList - usb_pipe.NextSibling
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mov edx, [ecx+usb_pipe.PrevSibling]
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mov [ebx+usb_pipe.NextSibling], ecx
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mov [ebx+usb_pipe.PrevSibling], edx
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mov [ecx+usb_pipe.PrevSibling], ebx
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mov [edx+usb_pipe.NextSibling], ebx
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pop edi
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ret
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.last_pipe:
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; That was the last pipe for the device.
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; 5. Notify device driver(s) about disconnect.
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call mutex_unlock
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mov eax, [ecx+usb_device_data.NumInterfaces]
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test eax, eax
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jz .notify_done
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add ecx, [ecx+usb_device_data.Interfaces]
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.notify_loop:
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mov edx, [ecx+usb_interface_data.DriverFunc]
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test edx, edx
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jz @f
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mov edx, [edx+USBSRV.usb_func]
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cmp [edx+USBFUNC.strucsize], USBFUNC.device_disconnect + 4
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jb @f
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mov edx, [edx+USBFUNC.device_disconnect]
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test edx, edx
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jz @f
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push eax ecx
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stdcall_verify edx, [ecx+usb_interface_data.DriverData]
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pop ecx eax
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@@:
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add ecx, sizeof.usb_interface_data
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dec eax
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jnz .notify_loop
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.notify_done:
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; 6. Kill the timer, if active.
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; (Usually not; possible if device is disconnected
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; while processing SET_ADDRESS request).
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mov eax, [ebx+usb_pipe.DeviceData]
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cmp [eax+usb_device_data.Timer], 0
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jz @f
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stdcall cancel_timer_hs, [eax+usb_device_data.Timer]
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mov [eax+usb_device_data.Timer], 0
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@@:
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; 7. Bus address, if assigned, can now be reused.
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call [edi+usb_hardware_func.GetDeviceAddress]
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test eax, eax
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jz @f
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bts [esi+usb_controller.ExistingAddresses], eax
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@@:
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dbgstr 'USB device disconnected'
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; 8. All drivers have returned from disconnect callback,
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; so all drivers should not use any device-related pipes.
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; Free the remaining pipes.
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mov eax, [ebx+usb_pipe.DeviceData]
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add eax, usb_device_data.ClosedPipeList - usb_pipe.NextSibling
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push eax
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mov eax, [eax+usb_pipe.NextSibling]
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.free_loop:
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cmp eax, [esp]
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jz .free_done
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push [eax+usb_pipe.NextSibling]
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stdcall [edi+usb_hardware_func.FreePipe], eax
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pop eax
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jmp .free_loop
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.free_done:
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stdcall [edi+usb_hardware_func.FreePipe], ebx
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pop eax
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; 9. Free the usb_device_data structure.
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sub eax, usb_device_data.ClosedPipeList - usb_pipe.NextSibling
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call free
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; 10. Return.
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.nothing:
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pop edi
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ret
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endp
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; This procedure is called when a pipe with USB_FLAG_DISABLED is removed from the
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; corresponding wait list. It means that the hardware has fully forgot about it.
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; ebx -> usb_pipe, esi -> usb_controller
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proc usb_pipe_disabled
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push edi
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mov edi, [esi+usb_controller.HardwareFunc]
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; 1. Acquire pipe lock.
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lea ecx, [ebx+usb_pipe.Lock]
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call mutex_lock
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; 2. Clear USB_FLAG_DISABLED in pipe state.
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and [ebx+usb_pipe.Flags], not USB_FLAG_DISABLED
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; 3. Sanity check: ignore uninitialized pipes.
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cmp [ebx+usb_pipe.LastTD], 0
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jz .no_transfer
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; 4. Acquire the first and last to-be-cancelled transfer descriptor,
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; save them in stack for the step 6,
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; ask the controller driver to enable the pipe for hardware,
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; removing transfers between first and last to-be-cancelled descriptors.
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lea ecx, [esi+usb_controller.ControlLock]
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cmp [ebx+usb_pipe.Type], BULK_PIPE
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jb @f ; control pipe
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lea ecx, [esi+usb_controller.BulkLock]
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jz @f ; bulk pipe
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lea ecx, [esi+usb_controller.PeriodicLock]
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@@:
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call mutex_lock
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mov eax, [ebx+usb_pipe.BaseList]
|
|
mov edx, [eax+usb_pipe.NextVirt]
|
|
mov [ebx+usb_pipe.NextVirt], edx
|
|
mov [ebx+usb_pipe.PrevVirt], eax
|
|
mov [edx+usb_pipe.PrevVirt], ebx
|
|
mov [eax+usb_pipe.NextVirt], ebx
|
|
mov eax, [ebx+usb_pipe.LastTD]
|
|
mov edx, [eax+usb_gtd.NextVirt]
|
|
mov [eax+usb_gtd.NextVirt], eax
|
|
mov [eax+usb_gtd.PrevVirt], eax
|
|
push eax
|
|
push edx
|
|
push ecx
|
|
call [edi+usb_hardware_func.EnablePipe]
|
|
pop ecx
|
|
call mutex_unlock
|
|
; 5. Release pipe lock acquired at step 1.
|
|
; Callbacks called at step 6 can insert new transfers,
|
|
; so we cannot call usb_pipe_aborted while holding pipe lock.
|
|
lea ecx, [ebx+usb_pipe.Lock]
|
|
call mutex_unlock
|
|
; 6. Notify all registered callbacks with status USB_STATUS_CANCELLED, if any.
|
|
; Two arguments describing transfers range were pushed at step 4.
|
|
push USB_STATUS_CANCELLED
|
|
call usb_pipe_aborted
|
|
pop edi
|
|
ret
|
|
.no_transfer:
|
|
call mutex_unlock
|
|
pop edi
|
|
ret
|
|
endp
|
|
|
|
; Part of API for drivers, see documentation for USBNormalTransferAsync.
|
|
proc usb_normal_transfer_async stdcall uses ebx edi,\
|
|
pipe:dword, buffer:dword, size:dword, callback:dword, calldata:dword, flags:dword
|
|
; 1. Sanity check: callback must be nonzero.
|
|
; (It is important for other parts of code.)
|
|
xor eax, eax
|
|
cmp [callback], eax
|
|
jz .nothing
|
|
; 2. Lock the transfer queue.
|
|
mov ebx, [pipe]
|
|
lea ecx, [ebx+usb_pipe.Lock]
|
|
call mutex_lock
|
|
; 3. If the pipe has already been closed (presumably due to device disconnect),
|
|
; release the lock taken in step 2 and return zero.
|
|
xor eax, eax
|
|
test [ebx+usb_pipe.Flags], USB_FLAG_CLOSED
|
|
jnz .unlock
|
|
; 4. Allocate and initialize TDs for the transfer.
|
|
mov edx, [ebx+usb_pipe.Controller]
|
|
mov edi, [edx+usb_controller.HardwareFunc]
|
|
stdcall [edi+usb_hardware_func.AllocTransfer], [buffer], [size], [flags], [ebx+usb_pipe.LastTD], 0
|
|
; If failed, release the lock taken in step 2 and return zero.
|
|
test eax, eax
|
|
jz .unlock
|
|
; 5. Store callback and its parameters in the last descriptor for this transfer.
|
|
mov ecx, [eax+usb_gtd.PrevVirt]
|
|
mov edx, [callback]
|
|
mov [ecx+usb_gtd.Callback], edx
|
|
mov edx, [calldata]
|
|
mov [ecx+usb_gtd.UserData], edx
|
|
mov edx, [buffer]
|
|
mov [ecx+usb_gtd.Buffer], edx
|
|
; 6. Advance LastTD pointer and activate transfer.
|
|
push [ebx+usb_pipe.LastTD]
|
|
mov [ebx+usb_pipe.LastTD], eax
|
|
call [edi+usb_hardware_func.InsertTransfer]
|
|
pop eax
|
|
; 7. Release the lock taken in step 2 and
|
|
; return pointer to the first descriptor for the new transfer.
|
|
.unlock:
|
|
push eax
|
|
lea ecx, [ebx+usb_pipe.Lock]
|
|
call mutex_unlock
|
|
pop eax
|
|
.nothing:
|
|
ret
|
|
endp
|
|
|
|
; Part of API for drivers, see documentation for USBControlTransferAsync.
|
|
proc usb_control_async stdcall uses ebx edi,\
|
|
pipe:dword, config:dword, buffer:dword, size:dword, callback:dword, calldata:dword, flags:dword
|
|
locals
|
|
last_td dd ?
|
|
endl
|
|
; 1. Sanity check: callback must be nonzero.
|
|
; (It is important for other parts of code.)
|
|
cmp [callback], 0
|
|
jz .return0
|
|
; 2. Lock the transfer queue.
|
|
mov ebx, [pipe]
|
|
lea ecx, [ebx+usb_pipe.Lock]
|
|
call mutex_lock
|
|
; 3. If the pipe has already been closed (presumably due to device disconnect),
|
|
; release the lock taken in step 2 and return zero.
|
|
test [ebx+usb_pipe.Flags], USB_FLAG_CLOSED
|
|
jnz .unlock_return0
|
|
; A control transfer contains two or three stages:
|
|
; Setup stage, optional Data stage, Status stage.
|
|
; 4. Allocate and initialize TDs for the Setup stage.
|
|
; Payload is 8 bytes from [config].
|
|
mov edx, [ebx+usb_pipe.Controller]
|
|
mov edi, [edx+usb_controller.HardwareFunc]
|
|
stdcall [edi+usb_hardware_func.AllocTransfer], [config], 8, 0, [ebx+usb_pipe.LastTD], (2 shl 2) + 0
|
|
; short transfer is an error, direction is DATA0, token is SETUP
|
|
mov [last_td], eax
|
|
test eax, eax
|
|
jz .fail
|
|
; 5. Allocate and initialize TDs for the Data stage, if [size] is nonzero.
|
|
; Payload is [size] bytes from [buffer].
|
|
mov edx, [config]
|
|
mov ecx, (3 shl 2) + 1 ; DATA1, token is OUT
|
|
cmp byte [edx], 0
|
|
jns @f
|
|
cmp [size], 0
|
|
jz @f
|
|
inc ecx ; token is IN
|
|
@@:
|
|
cmp [size], 0
|
|
jz .nodata
|
|
push ecx
|
|
stdcall [edi+usb_hardware_func.AllocTransfer], [buffer], [size], [flags], eax, ecx
|
|
pop ecx
|
|
test eax, eax
|
|
jz .fail
|
|
mov [last_td], eax
|
|
.nodata:
|
|
; 6. Allocate and initialize TDs for the Status stage.
|
|
; No payload.
|
|
xor ecx, 3 ; IN becomes OUT, OUT becomes IN
|
|
stdcall [edi+usb_hardware_func.AllocTransfer], 0, 0, 0, eax, ecx
|
|
test eax, eax
|
|
jz .fail
|
|
; 7. Store callback and its parameters in the last descriptor for this transfer.
|
|
mov ecx, [eax+usb_gtd.PrevVirt]
|
|
mov edx, [callback]
|
|
mov [ecx+usb_gtd.Callback], edx
|
|
mov edx, [calldata]
|
|
mov [ecx+usb_gtd.UserData], edx
|
|
mov edx, [buffer]
|
|
mov [ecx+usb_gtd.Buffer], edx
|
|
; 8. Advance LastTD pointer and activate transfer.
|
|
push [ebx+usb_pipe.LastTD]
|
|
mov [ebx+usb_pipe.LastTD], eax
|
|
call [edi+usb_hardware_func.InsertTransfer]
|
|
; 9. Release the lock taken in step 2 and
|
|
; return pointer to the first descriptor for the new transfer.
|
|
lea ecx, [ebx+usb_pipe.Lock]
|
|
call mutex_unlock
|
|
pop eax
|
|
ret
|
|
.fail:
|
|
mov eax, [last_td]
|
|
test eax, eax
|
|
jz .unlock_return0
|
|
stdcall usb_undo_tds, [ebx+usb_pipe.LastTD]
|
|
.unlock_return0:
|
|
lea ecx, [ebx+usb_pipe.Lock]
|
|
call mutex_unlock
|
|
.return0:
|
|
xor eax, eax
|
|
ret
|
|
endp
|
|
|
|
; Part of API for drivers, see documentation for USBAbortPipe.
|
|
proc usb_abort_pipe
|
|
push ebx esi ; save used registers to be stdcall
|
|
virtual at esp
|
|
rd 2 ; saved registers
|
|
dd ? ; return address
|
|
.pipe dd ?
|
|
end virtual
|
|
mov ebx, [.pipe]
|
|
; 1. Acquire pipe lock.
|
|
lea ecx, [ebx+usb_pipe.Lock]
|
|
call mutex_lock
|
|
; 2. If the pipe is already closed or abort is in progress,
|
|
; just release pipe lock and return.
|
|
test [ebx+usb_pipe.Flags], USB_FLAG_CLOSED + USB_FLAG_DISABLED
|
|
jnz .nothing
|
|
; 3. Mark the pipe as aborting.
|
|
or [ebx+usb_pipe.Flags], USB_FLAG_DISABLED
|
|
; 4. We cannot do anything except adding new transfers concurrently with hardware.
|
|
; Ask the controller driver to (temporarily) remove the pipe from hardware queue.
|
|
mov esi, [ebx+usb_pipe.Controller]
|
|
; 4a. Acquire queue lock.
|
|
lea ecx, [esi+usb_controller.ControlLock]
|
|
cmp [ebx+usb_pipe.Type], BULK_PIPE
|
|
jb @f ; control pipe
|
|
lea ecx, [esi+usb_controller.BulkLock]
|
|
jz @f ; bulk pipe
|
|
lea ecx, [esi+usb_controller.PeriodicLock]
|
|
@@:
|
|
call mutex_lock
|
|
push ecx
|
|
; 4b. Call the driver.
|
|
mov eax, [esi+usb_controller.HardwareFunc]
|
|
call [eax+usb_hardware_func.DisablePipe]
|
|
; 4c. Remove the pipe from software list.
|
|
mov eax, [ebx+usb_pipe.NextVirt]
|
|
mov edx, [ebx+usb_pipe.PrevVirt]
|
|
mov [eax+usb_pipe.PrevVirt], edx
|
|
mov [edx+usb_pipe.NextVirt], eax
|
|
; 4c. Register the pipe in corresponding wait list.
|
|
test [ebx+usb_pipe.Type], 1
|
|
jz .control_bulk
|
|
call usb_subscribe_periodic
|
|
jmp @f
|
|
.control_bulk:
|
|
call usb_subscribe_control
|
|
@@:
|
|
; 4d. Release queue lock.
|
|
pop ecx
|
|
call mutex_unlock
|
|
; 4e. Notify the USB thread about new work.
|
|
push ebx esi edi
|
|
call usb_wakeup
|
|
pop edi esi ebx
|
|
; That's all for now. To be continued in usb_pipe_disabled.
|
|
; 5. Release pipe lock acquired at step 1 and return.
|
|
.nothing:
|
|
lea ecx, [ebx+usb_pipe.Lock]
|
|
call mutex_unlock
|
|
pop esi ebx
|
|
ret 4
|
|
endp
|
|
|
|
; Part of API for drivers, see documentation for USBGetParam.
|
|
proc usb_get_param
|
|
virtual at esp
|
|
dd ? ; return address
|
|
.pipe dd ?
|
|
.param dd ?
|
|
end virtual
|
|
mov edx, [.param]
|
|
mov ecx, [.pipe]
|
|
mov eax, [ecx+usb_pipe.DeviceData]
|
|
test edx, edx
|
|
jz .get_device_descriptor
|
|
dec edx
|
|
jz .get_config_descriptor
|
|
dec edx
|
|
jz .get_speed
|
|
or eax, -1
|
|
ret 8
|
|
.get_device_descriptor:
|
|
add eax, usb_device_data.DeviceDescriptor
|
|
ret 8
|
|
.get_config_descriptor:
|
|
movzx ecx, [eax+usb_device_data.DeviceDescrSize]
|
|
lea eax, [eax+ecx+usb_device_data.DeviceDescriptor]
|
|
ret 8
|
|
.get_speed:
|
|
movzx eax, [eax+usb_device_data.Speed]
|
|
ret 8
|
|
endp
|
|
|
|
; Initialize software part of usb_gtd. Called from controller-specific code
|
|
; somewhere in AllocTransfer with eax -> next (inactive) usb_gtd,
|
|
; ebx -> usb_pipe, ebp frame from call to AllocTransfer with [.td] ->
|
|
; current (initializing) usb_gtd.
|
|
; Returns ecx = [.td].
|
|
proc usb_init_transfer
|
|
virtual at ebp-4
|
|
.Size dd ?
|
|
rd 2
|
|
.Buffer dd ?
|
|
dd ?
|
|
.Flags dd ?
|
|
.td dd ?
|
|
end virtual
|
|
mov [eax+usb_gtd.Pipe], ebx
|
|
mov ecx, [.td]
|
|
mov [eax+usb_gtd.PrevVirt], ecx
|
|
mov edx, [ecx+usb_gtd.NextVirt]
|
|
mov [ecx+usb_gtd.NextVirt], eax
|
|
mov [eax+usb_gtd.NextVirt], edx
|
|
mov [edx+usb_gtd.PrevVirt], eax
|
|
mov edx, [.Size]
|
|
mov [ecx+usb_gtd.Length], edx
|
|
xor edx, edx
|
|
mov [ecx+usb_gtd.Callback], edx
|
|
mov [ecx+usb_gtd.UserData], edx
|
|
ret
|
|
endp
|
|
|
|
; Free all TDs for the current transfer if something has failed
|
|
; during initialization (e.g. no memory for the next TD).
|
|
; Stdcall with one stack argument = first TD for the transfer
|
|
; and eax = last initialized TD for the transfer.
|
|
proc usb_undo_tds
|
|
push [eax+usb_gtd.NextVirt]
|
|
@@:
|
|
cmp eax, [esp+8]
|
|
jz @f
|
|
push [eax+usb_gtd.PrevVirt]
|
|
stdcall [edi+usb_hardware_func.FreeTD], eax
|
|
pop eax
|
|
jmp @b
|
|
@@:
|
|
pop ecx
|
|
mov [eax+usb_gtd.NextVirt], ecx
|
|
mov [ecx+usb_gtd.PrevVirt], eax
|
|
ret 4
|
|
endp
|
|
|
|
; Helper procedure for handling short packets in controller-specific code.
|
|
; Returns with CF cleared if this is the final packet in some stage:
|
|
; for control transfers that means one of Data and Status stages,
|
|
; for other transfers - the final packet in the only stage.
|
|
proc usb_is_final_packet
|
|
cmp [ebx+usb_gtd.Callback], 0
|
|
jnz .nothing
|
|
mov eax, [ebx+usb_gtd.NextVirt]
|
|
cmp [eax+usb_gtd.Callback], 0
|
|
jz .stc
|
|
mov eax, [ebx+usb_gtd.Pipe]
|
|
cmp [eax+usb_pipe.Type], CONTROL_PIPE
|
|
jz .nothing
|
|
.stc:
|
|
stc
|
|
.nothing:
|
|
ret
|
|
endp
|
|
|
|
; Helper procedure for controller-specific code:
|
|
; removes one TD from the transfer queue, ebx -> usb_gtd to remove.
|
|
proc usb_unlink_td
|
|
mov ecx, [ebx+usb_gtd.Pipe]
|
|
add ecx, usb_pipe.Lock
|
|
call mutex_lock
|
|
mov eax, [ebx+usb_gtd.PrevVirt]
|
|
mov edx, [ebx+usb_gtd.NextVirt]
|
|
mov [edx+usb_gtd.PrevVirt], eax
|
|
mov [eax+usb_gtd.NextVirt], edx
|
|
call mutex_unlock
|
|
ret
|
|
endp
|
|
|
|
; One part of transfer is completed, run the associated callback
|
|
; or update total length in the next part of transfer.
|
|
; in: ebx -> usb_gtd, ecx = status, edx = length
|
|
proc usb_process_gtd
|
|
; 1. Test whether it is the last descriptor in the transfer
|
|
; <=> it has an associated callback.
|
|
mov eax, [ebx+usb_gtd.Callback]
|
|
test eax, eax
|
|
jz .nocallback
|
|
; 2. It has an associated callback; call it with corresponding parameters.
|
|
stdcall_verify eax, [ebx+usb_gtd.Pipe], ecx, \
|
|
[ebx+usb_gtd.Buffer], edx, [ebx+usb_gtd.UserData]
|
|
ret
|
|
.nocallback:
|
|
; 3. It is an intermediate descriptor. Add its length to the length
|
|
; in the following descriptor.
|
|
mov eax, [ebx+usb_gtd.NextVirt]
|
|
add [eax+usb_gtd.Length], edx
|
|
ret
|
|
endp
|
|
|
|
if USB_STDCALL_VERIFY
|
|
proc verify_regs
|
|
virtual at esp
|
|
dd ? ; return address
|
|
.edi dd ?
|
|
.esi dd ?
|
|
.ebp dd ?
|
|
.esp dd ?
|
|
.ebx dd ?
|
|
.edx dd ?
|
|
.ecx dd ?
|
|
.eax dd ?
|
|
end virtual
|
|
cmp ebx, [.ebx]
|
|
jz @f
|
|
dbgstr 'ERROR!!! ebx changed'
|
|
@@:
|
|
cmp esi, [.esi]
|
|
jz @f
|
|
dbgstr 'ERROR!!! esi changed'
|
|
@@:
|
|
cmp edi, [.edi]
|
|
jz @f
|
|
dbgstr 'ERROR!!! edi changed'
|
|
@@:
|
|
cmp ebp, [.ebp]
|
|
jz @f
|
|
dbgstr 'ERROR!!! ebp changed'
|
|
@@:
|
|
ret
|
|
endp
|
|
end if
|