forked from KolibriOS/kolibrios
1248 lines
52 KiB
PHP
1248 lines
52 KiB
PHP
; Support for USB (non-root) hubs:
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; powering up/resetting/disabling ports,
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; watching for adding/removing devices.
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; =============================================================================
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; ================================= Constants =================================
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; =============================================================================
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; Hub constants
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; USB hub descriptor type
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USB_HUB_DESCRIPTOR = 29h
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; Features for CLEAR_FEATURE commands to the hub.
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C_HUB_LOCAL_POWER = 0
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C_HUB_OVER_CURRENT = 1
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; Bits in result of GET_STATUS command for a port.
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; Also suitable for CLEAR_FEATURE/SET_FEATURE commands, where applicable,
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; except TEST/INDICATOR.
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PORT_CONNECTION = 0
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PORT_ENABLE = 1
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PORT_SUSPEND = 2
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PORT_OVER_CURRENT = 3
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PORT_RESET = 4
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PORT_POWER = 8
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PORT_LOW_SPEED = 9
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PORT_HIGH_SPEED = 10
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PORT_TEST_BIT = 11
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PORT_INDICATOR_BIT = 12
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C_PORT_CONNECTION = 16
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C_PORT_ENABLE = 17
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C_PORT_SUSPEND = 18
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C_PORT_OVER_CURRENT = 19
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C_PORT_RESET = 20
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PORT_TEST_FEATURE = 21
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PORT_INDICATOR_FEATURE = 22
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; Internal constants
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; Bits in usb_hub.Actions
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HUB_WAIT_POWERED = 1
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; ports were powered, wait until power is stable
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HUB_WAIT_CONNECT = 2
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; some device was connected, wait initial debounce interval
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HUB_RESET_IN_PROGRESS = 4
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; reset in progress, so buffer for config requests is owned
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; by reset process; this includes all stages from initial disconnect test
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; to end of setting address (fail on any stage should lead to disabling port,
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; which requires a config request)
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HUB_RESET_WAITING = 8
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; the port is ready for reset, but another device somewhere on the bus
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; is resetting. Implies HUB_RESET_IN_PROGRESS
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HUB_RESET_SIGNAL = 10h
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; reset signalling is active for some port in the hub
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; Implies HUB_RESET_IN_PROGRESS
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HUB_RESET_RECOVERY = 20h
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; reset recovery is active for some port in the hub
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; Implies HUB_RESET_IN_PROGRESS
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; Well, I think that those 5 flags WAIT_CONNECT and RESET_* require additional
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; comments. So that is the overview of what happens with a new device assuming
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; no errors.
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; * device is connected;
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; * hub notifies us about connect event; after some processing
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; usb_hub_port_change finally processes that event, setting the flag
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; HUB_WAIT_CONNECT and storing time when the device was connected;
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; * 100 ms delay;
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; * usb_hub_process_deferred clears HUB_WAIT_CONNECT,
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; sets HUB_RESET_IN_PROGRESS, stores the port index in ConfigBuffer and asks
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; the hub whether there was a disconnect event for that port during those
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; 100 ms (on the hardware level notifications are obtained using polling
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; with some intervals, so it is possible that the corresponding notification
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; has not arrived yet);
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; * usb_hub_connect_port_status checks that there was no disconnect event
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; and sets HUB_RESET_WAITING flag (HUB_RESET_IN_PROGRESS is still set,
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; ConfigBuffer still contains the port index);
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; * usb_hub_process_deferred checks whether there is another device currently
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; resetting. If so, it waits until reset is done
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; (with HUB_RESET_WAITING and HUB_RESET_IN_PROGRESS bits set);
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; * usb_hub_process_deferred clears HUB_RESET_WAITING, sets HUB_RESET_SIGNAL
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; and initiates reset signalling on the port;
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; * usb_hub_process_deferred checks the status every tick;
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; when reset signalling is stopped by the hub, usb_hub_resetting_port_status
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; callback clears HUB_RESET_SIGNAL and sets HUB_RESET_RECOVERY;
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; * 10 ms (at least) delay;
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; * usb_hub_process_deferred clears HUB_RESET_RECOVERY and notifies other code
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; that the new device is ready to be configured;
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; * when it is possible to reset another device, the protocol layer
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; clears HUB_RESET_IN_PROGRESS bit.
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; =============================================================================
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; ================================ Structures =================================
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; =============================================================================
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; This structure contains all used data for one hub.
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struct usb_hub
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; All configured hubs are organized in the global usb_hub_list.
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; Two following fields give next/prev items in that list.
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; While the hub is unconfigured, they point to usb_hub itself.
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Next dd ?
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Prev dd ?
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Controller dd ?
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; Pointer to usb_controller for the bus.
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;
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; Handles of two pipes: configuration control pipe for zero endpoint opened by
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; the common code and status interrupt pipe opened by us.
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ConfigPipe dd ?
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StatusPipe dd ?
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NumPorts dd ?
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; Number of downstream ports; from 1 to 255.
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MaxPacketSize dd ?
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; Maximum packet size for interrupt endpoint.
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; Usually equals ceil((1+NumPorts)/8), but some hubs give additional bytes.
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Actions dd ?
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; Bitfield with HUB_* constants.
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PoweredOnTime dd ?
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; Time (in ticks) when all downstream ports were powered up.
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ResetTime dd ?
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; Time (in ticks) when the current port was reset;
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; when a port is resetting, contains the last tick of status check;
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; when reset recovery for a port is active, contains the time when
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; reset was completed.
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;
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; There are two possible reasons for configuration requests:
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; synchronous, when certain time is passed after something,
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; and asynchronous, when the hub is notifying about some change and
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; config request needs to be issued in order to query details.
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; Use two different buffers to avoid unnecessary dependencies.
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ConfigBuffer rb 8
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; Buffer for configuration requests for synchronous events.
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ChangeConfigBuffer rb 8
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; Buffer for configuration requests for status changes.
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AccStatusChange db ?
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; Accumulated status change. See 11.12.3 of USB2 spec or comments in code.
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HubCharacteristics dw ?
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; Copy of usb_hub_descr.wHubCharacteristics.
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PowerOnInterval db ?
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; Copy of usb_hub_descr.bPwrOn2PwrGood.
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;
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; Two following fields are written at once by GET_STATUS request
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; and must remain in this order.
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StatusData dw ?
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; Bitfield with 1 shl PORT_* indicating status of the current port.
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StatusChange dw ?
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; Bitfield with 1 shl PORT_* indicating change in status of the current port.
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; Two following fields are written at once by GET_STATUS request
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; and must remain in this order.
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; The meaning is the same as of StatusData/StatusChange; two following fields
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; are used by the synchronous requests to avoid unnecessary interactions with
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; the asynchronous handler.
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ResetStatusData dw ?
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ResetStatusChange dw ?
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StatusChangePtr dd ?
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; Pointer to StatusChangeBuf.
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ConnectedDevicesPtr dd ?
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; Pointer to ConnectedDevices.
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ConnectedTimePtr dd ?
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; Pointer to ConnectedTime.
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;
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; Variable-length parts:
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; DeviceRemovable rb (NumPorts+8)/8
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; Bit i+1 = device at port i (zero-based) is non-removable.
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; StatusChangeBuf rb (NumPorts+8)/8
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; Buffer for status interrupt pipe. Bit 0 = hub status change,
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; other bits = status change of the corresponding ports.
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; ConnectedDevices rd NumPorts
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; Pointers to config pipes for connected devices or zero if no device connected.
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; ConnectedTime rd NumPorts
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; For initial debounce interval:
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; time (in ticks) when a device was connected at that port.
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; Normally: -1
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ends
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; Hub descriptor.
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struct usb_hub_descr usb_descr
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bNbrPorts db ?
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; Number of downstream ports.
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wHubCharacteristics dw ?
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; Bit 0: 0 = all ports are powered at once, 1 = individual port power switching
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; Bit 1: reserved, must be zero
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; Bit 2: 1 = the hub is part of a compound device
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; Bits 3-4: 00 = global overcurrent protection,
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; 01 = individual port overcurrent protection,
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; 1x = no overcurrent protection
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; Bits 5-6: Transaction Translator Think Time, 8*(value+1) full-speed bit times
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; Bit 7: 1 = port indicators supported
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; Other bits are reserved.
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bPwrOn2PwrGood db ?
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; Time in 2ms intervals between powering up a port and a port becoming ready.
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bHubContrCurrent db ?
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; Maximum current requirements of the Hub Controller electronics in mA.
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; DeviceRemovable - variable length
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; Bit 0 is reserved, bit i+1 = device at port i is non-removable.
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; PortPwrCtrlMask - variable length
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; Obsolete, exists for compatibility. We ignore it.
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ends
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iglobal
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align 4
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; Implementation of struct USBFUNC for hubs.
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usb_hub_callbacks:
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dd usb_hub_callbacks_end - usb_hub_callbacks
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dd usb_hub_init
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dd usb_hub_disconnect
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usb_hub_callbacks_end:
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usb_hub_pseudosrv dd usb_hub_callbacks
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endg
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; This procedure is called when new hub is detected.
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; It initializes the device.
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; Technically, initialization implies sending several USB queries,
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; so it is split in several procedures. The first is usb_hub_init,
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; other are callbacks which will be called at some time in the future,
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; when the device will respond.
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; edx = usb_interface_descr, ecx = length rest
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proc usb_hub_init
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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 ? ; handle of the config pipe
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.config dd ? ; pointer to usb_config_descr
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.interface dd ? ; pointer to usb_interface_descr
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end virtual
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; Hubs use one IN interrupt endpoint for polling the device
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; 1. Locate the descriptor of the interrupt endpoint.
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; Loop over all descriptors owned by this interface.
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.lookep:
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; 1a. Skip the current descriptor.
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movzx eax, [edx+usb_descr.bLength]
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add edx, eax
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sub ecx, eax
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jb .errorep
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; 1b. Length of data left must be at least sizeof.usb_endpoint_descr.
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cmp ecx, sizeof.usb_endpoint_descr
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jb .errorep
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; 1c. If we have found another interface descriptor but not found our endpoint,
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; this is an error: all subsequent descriptors belong to that interface
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; (or further interfaces).
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cmp [edx+usb_endpoint_descr.bDescriptorType], USB_INTERFACE_DESCR
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jz .errorep
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; 1d. Ignore all interface-related descriptors except endpoint descriptor.
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cmp [edx+usb_endpoint_descr.bDescriptorType], USB_ENDPOINT_DESCR
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jnz .lookep
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; 1e. Length of endpoint descriptor must be at least sizeof.usb_endpoint_descr.
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cmp [edx+usb_endpoint_descr.bLength], sizeof.usb_endpoint_descr
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jb .errorep
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; 1f. Ignore all endpoints except for INTERRUPT IN.
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cmp [edx+usb_endpoint_descr.bEndpointAddress], 0
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jge .lookep
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mov al, [edx+usb_endpoint_descr.bmAttributes]
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and al, 3
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cmp al, INTERRUPT_PIPE
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jnz .lookep
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; We have located the descriptor for INTERRUPT IN endpoint,
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; the pointer is in edx.
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; 2. Allocate memory for the hub descriptor.
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; Maximum length (assuming 255 downstream ports) is 40 bytes.
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; Allocate 4 extra bytes to keep wMaxPacketSize.
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; 2a. Save registers.
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push edx
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; 2b. Call the allocator.
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movi eax, 44
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call malloc
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; 2c. Restore registers.
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pop ecx
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; 2d. If failed, say something to the debug board and return error.
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test eax, eax
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jz .nomemory
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; 2e. Store the pointer in esi. xchg eax,r32 is one byte shorter than mov.
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xchg esi, eax
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; 3. Open a pipe for the status endpoint with descriptor found in step 1.
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mov ebx, [.pipe]
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movzx eax, [ecx+usb_endpoint_descr.bEndpointAddress]
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movzx edx, [ecx+usb_endpoint_descr.bInterval]
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movzx ecx, [ecx+usb_endpoint_descr.wMaxPacketSize]
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test ecx, (1 shl 11) - 1
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jz .free
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push ecx
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stdcall usb_open_pipe, ebx, eax, ecx, INTERRUPT_PIPE, edx
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pop ecx
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; If failed, free the memory allocated in step 2,
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; say something to the debug board and return error.
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test eax, eax
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jz .free
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; 4. Send control query for the hub descriptor,
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; pass status pipe as a callback parameter,
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; allow short packets.
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and ecx, (1 shl 11) - 1
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mov [esi+40], ecx
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mov dword [esi], 0xA0 + \ ; class-specific request
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(USB_GET_DESCRIPTOR shl 8) + \
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(0 shl 16) + \ ; descriptor index 0
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(USB_HUB_DESCRIPTOR shl 24)
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mov dword [esi+4], 40 shl 16
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stdcall usb_control_async, ebx, esi, esi, 40, usb_hub_got_config, eax, 1
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; 5. If failed, free the memory allocated in step 2,
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; say something to the debug board and return error.
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test eax, eax
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jz .free
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; Otherwise, return 1. usb_hub_got_config will overwrite it later.
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xor eax, eax
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inc eax
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jmp .nothing
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.free:
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xchg eax, esi
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call free
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jmp .return0
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.errorep:
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dbgstr 'Invalid config descriptor for a hub'
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jmp .return0
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.nomemory:
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dbgstr 'No memory for USB hub data'
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.return0:
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xor eax, eax
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.nothing:
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pop esi ebx ; restore used registers to be stdcall
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retn 12
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endp
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; This procedure is called when the request for the hub descriptor initiated
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; by usb_hub_init is finished, either successfully or unsuccessfully.
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proc usb_hub_got_config stdcall, pipe:dword, status:dword, buffer:dword, length:dword, calldata:dword
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push ebx ; save used registers to be stdcall
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; 1. If failed, say something to the debug board, free the buffer
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; and stop the initialization.
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cmp [status], 0
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jnz .invalid
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; 2. The length must be at least sizeof.usb_hub_descr.
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; Note that [length] includes 8 bytes of setup packet.
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cmp [length], 8 + sizeof.usb_hub_descr
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jb .invalid
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; 3. Sanity checks for the hub descriptor.
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mov eax, [buffer]
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if USB_DUMP_DESCRIPTORS
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mov ecx, [length]
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sub ecx, 8
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DEBUGF 1,'K : hub config:'
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push eax
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@@:
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DEBUGF 1,' %x',[eax]:2
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inc eax
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dec ecx
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jnz @b
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DEBUGF 1,'\n'
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pop eax
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end if
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cmp [eax+usb_hub_descr.bLength], sizeof.usb_hub_descr
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jb .invalid
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cmp [eax+usb_hub_descr.bDescriptorType], USB_HUB_DESCRIPTOR
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jnz .invalid
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movzx ecx, [eax+usb_hub_descr.bNbrPorts]
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test ecx, ecx
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jz .invalid
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; 4. We use sizeof.usb_hub_descr bytes plus DeviceRemovable info;
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; size of DeviceRemovable is (NumPorts+1) bits, this gives
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; floor(NumPorts/8)+1 bytes. Check that all data are present in the
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; descriptor and were successfully read.
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mov edx, ecx
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shr edx, 3
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add edx, sizeof.usb_hub_descr + 1
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cmp [eax+usb_hub_descr.bLength], dl
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jb .invalid
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sub [length], 8
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cmp [length], edx
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jb .invalid
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; 5. Allocate the memory for usb_hub structure.
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; Total size of variable-length data is ALIGN_UP(floor(NumPorts/8)+1+MaxPacketSize,4)+8*NumPorts.
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add edx, [eax+40]
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add edx, sizeof.usb_hub - sizeof.usb_hub_descr + 3
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and edx, not 3
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lea eax, [edx+ecx*8]
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push ecx edx
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call malloc
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pop edx ecx
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test eax, eax
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jz .nomemory
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xchg eax, ebx
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; 6. Fill usb_hub structure.
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mov [ebx+usb_hub.NumPorts], ecx
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add edx, ebx
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mov [ebx+usb_hub.ConnectedDevicesPtr], edx
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mov eax, [pipe]
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mov [ebx+usb_hub.ConfigPipe], eax
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mov edx, [eax+usb_pipe.Controller]
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mov [ebx+usb_hub.Controller], edx
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mov eax, [calldata]
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mov [ebx+usb_hub.StatusPipe], eax
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push esi edi
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mov esi, [buffer]
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mov eax, [esi+40]
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mov [ebx+usb_hub.MaxPacketSize], eax
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; The following commands load bNbrPorts, wHubCharacteristics, bPwrOn2PwrGood.
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mov edx, dword [esi+usb_hub_descr.bNbrPorts]
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mov dl, 0
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; The following command zeroes AccStatusChange and stores
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; HubCharacteristics and PowerOnInterval.
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mov dword [ebx+usb_hub.AccStatusChange], edx
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xor eax, eax
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mov [ebx+usb_hub.Actions], eax
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; Copy DeviceRemovable data.
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lea edi, [ebx+sizeof.usb_hub]
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add esi, sizeof.usb_hub_descr
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mov edx, ecx
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shr ecx, 3
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inc ecx
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rep movsb
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mov [ebx+usb_hub.StatusChangePtr], edi
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; Zero ConnectedDevices.
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mov edi, [ebx+usb_hub.ConnectedDevicesPtr]
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mov ecx, edx
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rep stosd
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mov [ebx+usb_hub.ConnectedTimePtr], edi
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; Set ConnectedTime to -1.
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dec eax
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mov ecx, edx
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rep stosd
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pop edi esi
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; 7. Replace value of 1 returned from usb_hub_init to the real value.
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; Note: hubs are part of the core USB code, so this code can work with
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; internals of other parts. Another way, the only possible one for external
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; drivers, is to use two memory allocations: one (returned from AddDevice and
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; fixed after that) for pointer, another for real data. That would work also,
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; but wastes one allocation.
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mov eax, [pipe]
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mov eax, [eax+usb_pipe.DeviceData]
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add eax, [eax+usb_device_data.Interfaces]
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.scan:
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cmp [eax+usb_interface_data.DriverData], 1
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jnz @f
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cmp [eax+usb_interface_data.DriverFunc], usb_hub_pseudosrv - USBSRV.usb_func
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jz .scan_found
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@@:
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add eax, sizeof.usb_interface_data
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jmp .scan
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.scan_found:
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mov [eax+usb_interface_data.DriverData], ebx
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; 8. Insert the hub structure to the tail of the overall list of all hubs.
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mov ecx, usb_hubs_list
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mov edx, [ecx+usb_hub.Prev]
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mov [ecx+usb_hub.Prev], ebx
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mov [edx+usb_hub.Next], ebx
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mov [ebx+usb_hub.Prev], edx
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mov [ebx+usb_hub.Next], ecx
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; 9. Start powering up all ports.
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DEBUGF 1,'K : found hub with %d ports\n',[ebx+usb_hub.NumPorts]
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lea eax, [ebx+usb_hub.ConfigBuffer]
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xor ecx, ecx
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mov dword [eax], 23h + \ ; class-specific request to hub port
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(USB_SET_FEATURE shl 8) + \
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(PORT_POWER shl 16)
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mov edx, [ebx+usb_hub.NumPorts]
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mov dword [eax+4], edx
|
|
stdcall usb_control_async, [ebx+usb_hub.ConfigPipe], eax, ecx, ecx, usb_hub_port_powered, ebx, ecx
|
|
.freebuf:
|
|
; 10. Free the buffer for hub descriptor and return.
|
|
mov eax, [buffer]
|
|
call free
|
|
pop ebx ; restore used registers to be stdcall
|
|
ret
|
|
.nomemory:
|
|
dbgstr 'No memory for USB hub data'
|
|
jmp .freebuf
|
|
.invalid:
|
|
dbgstr 'Invalid hub descriptor'
|
|
jmp .freebuf
|
|
endp
|
|
|
|
; This procedure is called when the request to power up some port is completed,
|
|
; either successfully or unsuccessfully.
|
|
proc usb_hub_port_powered stdcall, pipe:dword, status:dword, buffer:dword, length:dword, calldata:dword
|
|
; 1. Check whether the operation was successful.
|
|
; If not, say something to the debug board and ssstop the initialization.
|
|
cmp [status], 0
|
|
jnz .invalid
|
|
; 2. Check whether all ports were powered.
|
|
; If so, go to 4. Otherwise, proceed to 3.
|
|
mov eax, [calldata]
|
|
dec dword [eax+usb_hub.ConfigBuffer+4]
|
|
jz .done
|
|
; 3. Power up the next port and return.
|
|
lea edx, [eax+usb_hub.ConfigBuffer]
|
|
xor ecx, ecx
|
|
stdcall usb_control_async, [eax+usb_hub.ConfigPipe], edx, ecx, ecx, usb_hub_port_powered, eax, ecx
|
|
.nothing:
|
|
ret
|
|
.done:
|
|
; 4. All ports were powered.
|
|
; The hub requires some delay until power will be stable, the delay value
|
|
; is provided in the hub descriptor; we have copied that value to
|
|
; usb_hub.PowerOnInterval. Note the time and set the corresponding flag
|
|
; for usb_hub_process_deferred.
|
|
mov ecx, [timer_ticks]
|
|
mov [eax+usb_hub.PoweredOnTime], ecx
|
|
or [eax+usb_hub.Actions], HUB_WAIT_POWERED
|
|
jmp .nothing
|
|
.invalid:
|
|
dbgstr 'Error while powering hub ports'
|
|
jmp .nothing
|
|
endp
|
|
|
|
; Requests notification about any changes in hub/ports configuration.
|
|
; Called when initial configuration is done and when a previous notification
|
|
; has been processed.
|
|
proc usb_hub_wait_change
|
|
stdcall usb_normal_transfer_async, [eax+usb_hub.StatusPipe], \
|
|
[eax+usb_hub.StatusChangePtr], [eax+usb_hub.MaxPacketSize], usb_hub_changed, eax, 1
|
|
ret
|
|
endp
|
|
|
|
; This procedure is called when something has changed on the hub.
|
|
proc usb_hub_changed stdcall, pipe:dword, status:dword, buffer:dword, length:dword, calldata:dword
|
|
; DEBUGF 1,'K : [%d] int pipe for hub %x\n',[timer_ticks],[calldata]
|
|
; 1. Check whether our request has failed.
|
|
; If so, say something to the debug board and stop processing notifications.
|
|
xor ecx, ecx
|
|
cmp [status], ecx
|
|
jnz .failed
|
|
; 2. If no data were retrieved, restart waiting.
|
|
mov eax, [calldata]
|
|
cmp [length], ecx
|
|
jz .continue
|
|
; 3. If size of data retrieved is less than maximal, pad with zeroes;
|
|
; this corresponds to 'state of other ports was not changed'
|
|
mov ecx, [eax+usb_hub.NumPorts]
|
|
shr ecx, 3
|
|
inc ecx
|
|
sub ecx, [length]
|
|
jbe .restart
|
|
push eax edi
|
|
mov edi, [buffer]
|
|
add edi, [length]
|
|
xor eax, eax
|
|
rep stosb
|
|
pop edi eax
|
|
.restart:
|
|
; State of some elements of the hub was changed.
|
|
; Find the first element that was changed,
|
|
; ask the hub about nature of the change,
|
|
; clear the corresponding change,
|
|
; reask the hub about status+change (it is possible that another change
|
|
; occurs between the first ask and clearing the change; we won't see that
|
|
; change, so we need to query the status after clearing the change),
|
|
; continue two previous steps until nothing changes,
|
|
; process all changes which were registered.
|
|
; When all changes for one element will be processed, return to here and look
|
|
; for other changed elements.
|
|
mov edx, [eax+usb_hub.StatusChangePtr]
|
|
; We keep all observed changes in the special var usb_hub.AccStatusChange;
|
|
; it will be logical OR of all observed StatusChange's.
|
|
; 4. No observed changes yet, zero usb_hub.AccStatusChange.
|
|
xor ecx, ecx
|
|
mov [eax+usb_hub.AccStatusChange], cl
|
|
; 5. Test whether there was a change in the hub itself.
|
|
; If so, query hub state.
|
|
btr dword [edx], ecx
|
|
jnc .no_hub_change
|
|
.next_hub_change:
|
|
; DEBUGF 1,'K : [%d] querying status of hub %x\n',[timer_ticks],eax
|
|
lea edx, [eax+usb_hub.ChangeConfigBuffer]
|
|
lea ecx, [eax+usb_hub.StatusData]
|
|
mov dword [edx], 0A0h + \ ; class-specific request from hub itself
|
|
(USB_GET_STATUS shl 8)
|
|
mov dword [edx+4], 4 shl 16 ; get 4 bytes
|
|
stdcall usb_control_async, [eax+usb_hub.ConfigPipe], edx, ecx, 4, usb_hub_status, eax, 0
|
|
jmp .nothing
|
|
.no_hub_change:
|
|
; 6. Find the first port with changed state and clear the corresponding bit
|
|
; (so next scan after .restart will not consider this port again).
|
|
; If found, go to 8. Otherwise, advance to 7.
|
|
inc ecx
|
|
.test_port_change:
|
|
btr [edx], ecx
|
|
jc .found_port_change
|
|
inc ecx
|
|
cmp ecx, [eax+usb_hub.NumPorts]
|
|
jbe .test_port_change
|
|
.continue:
|
|
; 7. All changes have been processed. Wait for next notification.
|
|
call usb_hub_wait_change
|
|
.nothing:
|
|
ret
|
|
.found_port_change:
|
|
mov dword [eax+usb_hub.ChangeConfigBuffer+4], ecx
|
|
.next_port_change:
|
|
; 8. Query port state. Continue work in usb_hub_port_status callback.
|
|
; movzx ecx, [eax+usb_hub.ChangeConfigBuffer+4]
|
|
; dec ecx
|
|
; DEBUGF 1,'K : [%d] querying status of hub %x port %d\n',[timer_ticks],eax,ecx
|
|
lea edx, [eax+usb_hub.ChangeConfigBuffer]
|
|
mov dword [edx], 0A3h + \ ; class-specific request from hub port
|
|
(USB_GET_STATUS shl 8)
|
|
mov byte [edx+6], 4 ; data length = 4 bytes
|
|
lea ecx, [eax+usb_hub.StatusData]
|
|
stdcall usb_control_async, [eax+usb_hub.ConfigPipe], edx, ecx, 4, usb_hub_port_status, eax, 0
|
|
jmp .nothing
|
|
.failed:
|
|
cmp [status], USB_STATUS_CLOSED
|
|
jz .nothing
|
|
dbgstr 'Querying hub notification failed'
|
|
jmp .nothing
|
|
endp
|
|
|
|
; This procedure is called when the request of hub status is completed,
|
|
; either successfully or unsuccessfully.
|
|
proc usb_hub_status stdcall, pipe:dword, status:dword, buffer:dword, length:dword, calldata:dword
|
|
; 1. Check whether our request has failed.
|
|
; If so, say something to the debug board and stop processing notifications.
|
|
cmp [status], 0
|
|
jnz .failed
|
|
; 2. Accumulate observed changes.
|
|
mov eax, [calldata]
|
|
mov dl, byte [eax+usb_hub.StatusChange]
|
|
or [eax+usb_hub.AccStatusChange], dl
|
|
.next_change:
|
|
; 3. Find the first change. If found, advance to 4. Otherwise, go to 5.
|
|
mov cl, C_HUB_OVER_CURRENT
|
|
btr dword [eax+usb_hub.StatusChange], 1
|
|
jc .clear_hub_change
|
|
mov cl, C_HUB_LOCAL_POWER
|
|
btr dword [eax+usb_hub.StatusChange], 0
|
|
jnc .final
|
|
.clear_hub_change:
|
|
; 4. Clear the change and continue in usb_hub_change_cleared callback.
|
|
lea edx, [eax+usb_hub.ChangeConfigBuffer]
|
|
mov dword [edx], 20h + \ ; class-specific request to hub itself
|
|
(USB_CLEAR_FEATURE shl 8)
|
|
mov [edx+2], cl ; feature selector
|
|
and dword [edx+4], 0
|
|
stdcall usb_control_async, [eax+usb_hub.ConfigPipe], edx, 0, 0, usb_hub_change_cleared, eax, 0
|
|
.nothing:
|
|
ret
|
|
.final:
|
|
; 5. All changes cleared and accumulated, now process them.
|
|
; Note: that needs work.
|
|
DEBUGF 1,'K : hub status %x\n',[eax+usb_hub.AccStatusChange]:2
|
|
test [eax+usb_hub.AccStatusChange], 1
|
|
jz .no_local_power
|
|
test [eax+usb_hub.StatusData], 1
|
|
jz .local_power_lost
|
|
dbgstr 'Hub local power is now good'
|
|
jmp .no_local_power
|
|
.local_power_lost:
|
|
dbgstr 'Hub local power is now lost'
|
|
.no_local_power:
|
|
test [eax+usb_hub.AccStatusChange], 2
|
|
jz .no_overcurrent
|
|
test [eax+usb_hub.StatusData], 2
|
|
jz .no_overcurrent
|
|
dbgstr 'Hub global overcurrent'
|
|
.no_overcurrent:
|
|
; 6. Process possible changes for other ports.
|
|
jmp usb_hub_changed.restart
|
|
.failed:
|
|
dbgstr 'Querying hub status failed'
|
|
jmp .nothing
|
|
endp
|
|
|
|
; This procedure is called when the request to clear hub change is completed,
|
|
; either successfully or unsuccessfully.
|
|
proc usb_hub_change_cleared stdcall, pipe:dword, status:dword, buffer:dword, length:dword, calldata:dword
|
|
; 1. Check whether our request has failed.
|
|
; If so, say something to the debug board and stop processing notifications.
|
|
cmp [status], 0
|
|
jnz .failed
|
|
; 2. If there is a change which was observed, but not yet cleared,
|
|
; go to the code which clears it.
|
|
mov eax, [calldata]
|
|
cmp [eax+usb_hub.StatusChange], 0
|
|
jnz usb_hub_status.next_change
|
|
; 3. Otherwise, go to the code which queries the status.
|
|
jmp usb_hub_changed.next_hub_change
|
|
.failed:
|
|
dbgstr 'Clearing hub change failed'
|
|
ret
|
|
endp
|
|
|
|
; This procedure is called when the request of port status is completed,
|
|
; either successfully or unsuccessfully.
|
|
proc usb_hub_port_status stdcall, pipe:dword, status:dword, buffer:dword, length:dword, calldata:dword
|
|
; 1. Check whether our request has failed.
|
|
; If so, say something to the debug board and stop processing notifications.
|
|
cmp [status], 0
|
|
jnz .failed
|
|
; 2. Accumulate observed changes.
|
|
mov eax, [calldata]
|
|
; movzx ecx, [eax+usb_hub.ChangeConfigBuffer+4]
|
|
; dec ecx
|
|
; DEBUGF 1,'K : [%d] hub %x port %d status %x change %x\n',[timer_ticks],eax,ecx,[eax+usb_hub.StatusData]:4,[eax+usb_hub.StatusChange]:4
|
|
mov dl, byte [eax+usb_hub.StatusChange]
|
|
or [eax+usb_hub.AccStatusChange], dl
|
|
.next_change:
|
|
; 3. Find the first change. If found, advance to 4. Otherwise, go to 5.
|
|
; Ignore change in reset status; it is cleared by synchronous code
|
|
; (usb_hub_process_deferred), so avoid unnecessary interference.
|
|
; mov cl, C_PORT_RESET
|
|
btr dword [eax+usb_hub.StatusChange], PORT_RESET
|
|
; jc .clear_port_change
|
|
mov cl, C_PORT_OVER_CURRENT
|
|
btr dword [eax+usb_hub.StatusChange], PORT_OVER_CURRENT
|
|
jc .clear_port_change
|
|
mov cl, C_PORT_SUSPEND
|
|
btr dword [eax+usb_hub.StatusChange], PORT_SUSPEND
|
|
jc .clear_port_change
|
|
mov cl, C_PORT_ENABLE
|
|
btr dword [eax+usb_hub.StatusChange], PORT_ENABLE
|
|
jc .clear_port_change
|
|
mov cl, C_PORT_CONNECTION
|
|
btr dword [eax+usb_hub.StatusChange], PORT_CONNECTION
|
|
jnc .final
|
|
.clear_port_change:
|
|
; 4. Clear the change and continue in usb_hub_port_changed callback.
|
|
call usb_hub_clear_port_change
|
|
jmp .nothing
|
|
.final:
|
|
; All changes cleared and accumulated, now process them.
|
|
movzx ecx, byte [eax+usb_hub.ChangeConfigBuffer+4]
|
|
dec ecx
|
|
DEBUGF 1,'K : final: hub %x port %d status %x change %x\n',eax,ecx,[eax+usb_hub.StatusData]:4,[eax+usb_hub.AccStatusChange]:2
|
|
; 5. Process connect/disconnect events.
|
|
; 5a. Test whether there is such event.
|
|
test byte [eax+usb_hub.AccStatusChange], 1 shl PORT_CONNECTION
|
|
jz .nodisconnect
|
|
; 5b. If there was a connected device, notify the main code about disconnect.
|
|
push ebx
|
|
mov edx, [eax+usb_hub.ConnectedDevicesPtr]
|
|
xor ebx, ebx
|
|
xchg ebx, [edx+ecx*4]
|
|
test ebx, ebx
|
|
jz @f
|
|
push eax ecx
|
|
call usb_device_disconnected
|
|
pop ecx eax
|
|
@@:
|
|
pop ebx
|
|
; 5c. If the disconnect event corresponds to the port which is currently
|
|
; resetting, then another request from synchronous code could be in the fly,
|
|
; so aborting reset immediately would lead to problems with those requests.
|
|
; Thus, just set the corresponding status and let the synchronous code process.
|
|
test byte [eax+usb_hub.Actions], (HUB_RESET_SIGNAL or HUB_RESET_RECOVERY)
|
|
jz @f
|
|
mov edx, [eax+usb_hub.Controller]
|
|
cmp [edx+usb_controller.ResettingPort], cl
|
|
jnz @f
|
|
mov [edx+usb_controller.ResettingStatus], -1
|
|
@@:
|
|
; 5d. If the current status is 'connected', store the current time as connect
|
|
; time and set the corresponding bit for usb_hub_process_deferred.
|
|
; Otherwise, set connect time to -1.
|
|
; If current time is -1, pretend that the event occured one tick later and
|
|
; store zero.
|
|
mov edx, [eax+usb_hub.ConnectedTimePtr]
|
|
test byte [eax+usb_hub.StatusData], 1 shl PORT_CONNECTION
|
|
jz .disconnected
|
|
or [eax+usb_hub.Actions], HUB_WAIT_CONNECT
|
|
push eax
|
|
call usb_hub_store_connected_time
|
|
pop eax
|
|
jmp @f
|
|
.disconnected:
|
|
or dword [edx+ecx*4], -1
|
|
@@:
|
|
.nodisconnect:
|
|
; 6. Process port disabling.
|
|
test [eax+usb_hub.AccStatusChange], 1 shl PORT_ENABLE
|
|
jz .nodisable
|
|
test byte [eax+usb_hub.StatusData], 1 shl PORT_ENABLE
|
|
jnz .nodisable
|
|
; Note: that needs work.
|
|
dbgstr 'Port disabled'
|
|
.nodisable:
|
|
; 7. Process port overcurrent.
|
|
test [eax+usb_hub.AccStatusChange], 1 shl PORT_OVER_CURRENT
|
|
jz .noovercurrent
|
|
test byte [eax+usb_hub.StatusData], 1 shl PORT_OVER_CURRENT
|
|
jz .noovercurrent
|
|
; Note: that needs work.
|
|
dbgstr 'Port over-current'
|
|
.noovercurrent:
|
|
; 8. Process possible changes for other ports.
|
|
jmp usb_hub_changed.restart
|
|
.failed:
|
|
dbgstr 'Querying port status failed'
|
|
.nothing:
|
|
ret
|
|
endp
|
|
|
|
; Helper procedure to store current time in ConnectedTime,
|
|
; advancing -1 to zero if needed.
|
|
proc usb_hub_store_connected_time
|
|
mov eax, [timer_ticks]
|
|
; transform -1 to 0, leave other values as is
|
|
cmp eax, -1
|
|
sbb eax, -1
|
|
mov [edx+ecx*4], eax
|
|
ret
|
|
endp
|
|
|
|
; Helper procedure for several parts of hub code.
|
|
; Sends a request to clear the given feature of the port.
|
|
; eax -> usb_hub, cl = feature;
|
|
; as is should be called from async code, sync code should set
|
|
; edx to ConfigBuffer and call usb_hub_clear_port_change.buffer;
|
|
; port number (1-based) should be filled in [edx+4] by previous requests.
|
|
proc usb_hub_clear_port_change
|
|
lea edx, [eax+usb_hub.ChangeConfigBuffer]
|
|
.buffer:
|
|
; push edx
|
|
; movzx edx, byte [edx+4]
|
|
; dec edx
|
|
; DEBUGF 1,'K : [%d] hub %x port %d clear feature %d\n',[timer_ticks],eax,edx,cl
|
|
; pop edx
|
|
mov dword [edx], 23h + \ ; class-specific request to hub port
|
|
(USB_CLEAR_FEATURE shl 8)
|
|
mov byte [edx+2], cl
|
|
and dword [edx+4], 0xFF
|
|
stdcall usb_control_async, [eax+usb_hub.ConfigPipe], edx, edx, 0, usb_hub_port_changed, eax, 0
|
|
ret
|
|
endp
|
|
|
|
; This procedure is called when the request to clear port change is completed,
|
|
; either successfully or unsuccessfully.
|
|
proc usb_hub_port_changed stdcall, pipe:dword, status:dword, buffer:dword, length:dword, calldata:dword
|
|
; 1. Check whether our request has failed.
|
|
; If so, say something to the debug board and stop processing notifications.
|
|
cmp [status], 0
|
|
jnz .failed
|
|
; 2. If the request was originated by synchronous code, no further processing
|
|
; is required.
|
|
mov eax, [calldata]
|
|
lea edx, [eax+usb_hub.ConfigBuffer]
|
|
cmp [buffer], edx
|
|
jz .nothing
|
|
; 3. If there is a change which was observed, but not yet cleared,
|
|
; go to the code which clears it.
|
|
cmp [eax+usb_hub.StatusChange], 0
|
|
jnz usb_hub_port_status.next_change
|
|
; 4. Otherwise, go to the code which queries the status.
|
|
jmp usb_hub_changed.next_port_change
|
|
.failed:
|
|
dbgstr 'Clearing port change failed'
|
|
.nothing:
|
|
ret
|
|
endp
|
|
|
|
; This procedure is called in the USB thread from usb_thread_proc,
|
|
; contains synchronous code which should be activated at certain time
|
|
; (e.g. reset a recently connected device after debounce interval 100ms).
|
|
; Returns the number of ticks when it should be called next time.
|
|
proc usb_hub_process_deferred
|
|
; 1. Top-of-stack will contain return value; initialize to infinite timeout.
|
|
push -1
|
|
; 2. If wait for stable power is active, then
|
|
; either reschedule wakeup (if time is not over)
|
|
; or start processing notifications.
|
|
test byte [esi+usb_hub.Actions], HUB_WAIT_POWERED
|
|
jz .no_powered
|
|
movzx eax, [esi+usb_hub.PowerOnInterval]
|
|
; three following instructions are equivalent to edx = ceil(eax / 5) + 1
|
|
; 1 extra tick is added to make sure that the interval is at least as needed
|
|
; (it is possible that PoweredOnTime was set just before timer interrupt, and
|
|
; this test goes on just after timer interrupt)
|
|
add eax, 9
|
|
; two following instructions are equivalent to edx = floor(eax / 5)
|
|
; for any 0 <= eax < 40000000h
|
|
mov ecx, 33333334h
|
|
mul ecx
|
|
mov eax, [timer_ticks]
|
|
sub eax, [esi+usb_hub.PoweredOnTime]
|
|
sub eax, edx
|
|
jge .powered_on
|
|
neg eax
|
|
pop ecx
|
|
push eax
|
|
jmp .no_powered
|
|
.powered_on:
|
|
and [esi+usb_hub.Actions], not HUB_WAIT_POWERED
|
|
mov eax, esi
|
|
call usb_hub_wait_change
|
|
.no_powered:
|
|
; 3. If reset is pending, check whether we can start it and start it, if so.
|
|
test byte [esi+usb_hub.Actions], HUB_RESET_WAITING
|
|
jz .no_wait_reset
|
|
mov eax, [esi+usb_hub.Controller]
|
|
cmp [eax+usb_controller.ResettingPort], -1
|
|
jnz .no_wait_reset
|
|
call usb_hub_initiate_reset
|
|
.no_wait_reset:
|
|
; 4. If reset signalling is active, wait for end of reset signalling
|
|
; and schedule wakeup in 1 tick.
|
|
test byte [esi+usb_hub.Actions], HUB_RESET_SIGNAL
|
|
jz .no_resetting_port
|
|
; It has no sense to query status several times per tick.
|
|
mov eax, [timer_ticks]
|
|
cmp eax, [esi+usb_hub.ResetTime]
|
|
jz @f
|
|
mov [esi+usb_hub.ResetTime], eax
|
|
movzx ecx, byte [esi+usb_hub.ConfigBuffer+4]
|
|
mov eax, usb_hub_resetting_port_status
|
|
call usb_hub_query_port_status
|
|
@@:
|
|
pop eax
|
|
push 1
|
|
.no_resetting_port:
|
|
; 5. If reset recovery is active and time is not over, reschedule wakeup.
|
|
test byte [esi+usb_hub.Actions], HUB_RESET_RECOVERY
|
|
jz .no_reset_recovery
|
|
mov eax, [timer_ticks]
|
|
sub eax, [esi+usb_hub.ResetTime]
|
|
sub eax, USB_RESET_RECOVERY_TIME
|
|
jge .reset_done
|
|
neg eax
|
|
cmp [esp], eax
|
|
jb @f
|
|
mov [esp], eax
|
|
@@:
|
|
jmp .no_reset_recovery
|
|
.reset_done:
|
|
; 6. If reset recovery is active and time is over, clear 'reset recovery' flag,
|
|
; notify other code about a new device and let it do further steps.
|
|
; If that fails, stop reset process for this port and disable that port.
|
|
and [esi+usb_hub.Actions], not HUB_RESET_RECOVERY
|
|
; Bits 9-10 of port status encode port speed.
|
|
; If PORT_LOW_SPEED is set, the device is low-speed. Otherwise,
|
|
; PORT_HIGH_SPEED bit distinguishes full-speed and high-speed devices.
|
|
; This corresponds to values of USB_SPEED_FS=0, USB_SPEED_LS=1, USB_SPEED_HS=2.
|
|
mov eax, dword [esi+usb_hub.ResetStatusData]
|
|
shr eax, PORT_LOW_SPEED
|
|
and eax, 3
|
|
test al, 1
|
|
jz @f
|
|
mov al, 1
|
|
@@:
|
|
; movzx ecx, [esi+usb_hub.ConfigBuffer+4]
|
|
; dec ecx
|
|
; DEBUGF 1,'K : [%d] hub %x port %d speed %d\n',[timer_ticks],esi,ecx,eax
|
|
push esi
|
|
mov esi, [esi+usb_hub.Controller]
|
|
cmp [esi+usb_controller.ResettingStatus], -1
|
|
jz .disconnected_while_reset
|
|
mov edx, [esi+usb_controller.HardwareFunc]
|
|
call [edx+usb_hardware_func.NewDevice]
|
|
pop esi
|
|
test eax, eax
|
|
jnz .no_reset_recovery
|
|
mov eax, esi
|
|
call usb_hub_disable_resetting_port
|
|
jmp .no_reset_recovery
|
|
.disconnected_while_reset:
|
|
pop esi
|
|
mov eax, esi
|
|
call usb_hub_reset_aborted
|
|
.no_reset_recovery:
|
|
; 7. Handle recent connection events.
|
|
; Note: that should be done after step 6, because step 6 can clear
|
|
; HUB_RESET_IN_PROGRESS flag.
|
|
; 7a. Test whether there is such an event pending. If no, skip this step.
|
|
test byte [esi+usb_hub.Actions], HUB_WAIT_CONNECT
|
|
jz .no_wait_connect
|
|
; 7b. If we have started reset process for another port in the same hub,
|
|
; skip this step: the buffer for config requests can be used for that port.
|
|
test byte [esi+usb_hub.Actions], HUB_RESET_IN_PROGRESS
|
|
jnz .no_wait_connect
|
|
; 7c. Clear flag 'there are connection events which should be processed'.
|
|
; If there are another connection events, this flag will be set again.
|
|
and [esi+usb_hub.Actions], not HUB_WAIT_CONNECT
|
|
; 7d. Prepare for loop over all ports.
|
|
xor ecx, ecx
|
|
.test_wait_connect:
|
|
; 7e. For every port test for recent connection event.
|
|
; If none, continue the loop for the next port.
|
|
mov edx, [esi+usb_hub.ConnectedTimePtr]
|
|
mov eax, [edx+ecx*4]
|
|
cmp eax, -1
|
|
jz .next_wait_connect
|
|
or [esi+usb_hub.Actions], HUB_WAIT_CONNECT
|
|
; 7f. Test whether initial delay is over.
|
|
sub eax, [timer_ticks]
|
|
neg eax
|
|
sub eax, USB_CONNECT_DELAY
|
|
jge .connect_delay_over
|
|
; 7g. The initial delay is not over;
|
|
; set the corresponding flag again, reschedule wakeup and continue the loop.
|
|
neg eax
|
|
cmp [esp], eax
|
|
jb @f
|
|
mov [esp], eax
|
|
@@:
|
|
jmp .next_wait_connect
|
|
.connect_delay_over:
|
|
; The initial delay is over.
|
|
; It is possible that there was disconnect event during that delay, probably
|
|
; with connect event after that. If so, we should restart the waiting. However,
|
|
; on the hardware level connect/disconnect events from hubs are implemented
|
|
; using polling with interval selected by the hub, so it is possible that
|
|
; we have not yet observed that disconnect event.
|
|
; Thus, we query port status+change data before all further processing.
|
|
; 7h. Send the request for status+change data.
|
|
push ecx
|
|
; Hub requests expect 1-based port number, not zero-based we operate with.
|
|
inc ecx
|
|
mov eax, usb_hub_connect_port_status
|
|
call usb_hub_query_port_status
|
|
pop ecx
|
|
; 3i. If request has been submitted successfully, set the flag
|
|
; 'reset in progress, config buffer is owned by reset process' and break
|
|
; from the loop.
|
|
test eax, eax
|
|
jz .next_wait_connect
|
|
or [esi+usb_hub.Actions], HUB_RESET_IN_PROGRESS
|
|
jmp .no_wait_connect
|
|
.next_wait_connect:
|
|
; 7j. Continue the loop for next port.
|
|
inc ecx
|
|
cmp ecx, [esi+usb_hub.NumPorts]
|
|
jb .test_wait_connect
|
|
.no_wait_connect:
|
|
; 8. Pop return value from top-of-stack and return.
|
|
pop eax
|
|
ret
|
|
endp
|
|
|
|
; Helper procedure for other code. Called when reset process is aborted.
|
|
proc usb_hub_reset_aborted
|
|
; Clear 'reset in progress' flag and test for other devices which could be
|
|
; waiting for reset.
|
|
and [eax+usb_hub.Actions], not HUB_RESET_IN_PROGRESS
|
|
push esi
|
|
mov esi, [eax+usb_hub.Controller]
|
|
call usb_test_pending_port
|
|
pop esi
|
|
ret
|
|
endp
|
|
|
|
; Helper procedure for usb_hub_process_deferred.
|
|
; Sends a request to query port status.
|
|
; esi -> usb_hub, eax = callback, ecx = 1-based port.
|
|
proc usb_hub_query_port_status
|
|
; dec ecx
|
|
; DEBUGF 1,'K : [%d] [main] hub %x port %d query status\n',[timer_ticks],esi,ecx
|
|
; inc ecx
|
|
add ecx, 4 shl 16 ; data length = 4
|
|
lea edx, [esi+usb_hub.ConfigBuffer]
|
|
mov dword [edx], 0A3h + \ ; class-specific request from hub port
|
|
(USB_GET_STATUS shl 8)
|
|
mov dword [edx+4], ecx
|
|
lea ecx, [esi+usb_hub.ResetStatusData]
|
|
stdcall usb_control_async, [esi+usb_hub.ConfigPipe], edx, ecx, 4, eax, esi, 0
|
|
ret
|
|
endp
|
|
|
|
; This procedure is called when the request to query port status
|
|
; initiated by usb_hub_process_deferred for testing connection is completed,
|
|
; either successfully or unsuccessfully.
|
|
proc usb_hub_connect_port_status stdcall, pipe:dword, status:dword, buffer:dword, length:dword, calldata:dword
|
|
push esi ; save used register to be stdcall
|
|
mov eax, [calldata]
|
|
mov esi, [pipe]
|
|
; movzx ecx, [eax+usb_hub.ConfigBuffer+4]
|
|
; dec ecx
|
|
; DEBUGF 1,'K : [%d] [connect test] hub %x port %d status %x change %x\n',[timer_ticks],eax,ecx,[eax+usb_hub.ResetStatusData]:4,[eax+usb_hub.ResetStatusChange]:4
|
|
; 1. In any case, clear 'reset in progress' flag.
|
|
; If everything is ok, it would be set again.
|
|
and [eax+usb_hub.Actions], not HUB_RESET_IN_PROGRESS
|
|
; 2. If the request has failed, stop reset process.
|
|
cmp [status], 0
|
|
jnz .nothing
|
|
mov edx, [eax+usb_hub.ConnectedTimePtr]
|
|
movzx ecx, byte [eax+usb_hub.ConfigBuffer+4]
|
|
dec ecx
|
|
; 3. Test whether there was a disconnect event.
|
|
test byte [eax+usb_hub.ResetStatusChange], 1 shl PORT_CONNECTION
|
|
jz .reset
|
|
; 4. There was a disconnect event.
|
|
; There is another handler of connect/disconnect events, usb_hub_port_status.
|
|
; However, we do not know whether it has already processed this event
|
|
; or it will process it sometime later.
|
|
; If ConnectedTime is -1, then another handler has already run,
|
|
; there was no connection event, so just leave the value as -1.
|
|
; Otherwise, there are two possibilities: either another handler has not yet
|
|
; run (which is quite likely), or there was a connection event and the other
|
|
; handler has run exactly while our request was processed (otherwise our
|
|
; request would not been submitted; this is quite unlikely due to timing
|
|
; requirements, but not impossible). In this case, set ConnectedTime to the
|
|
; current time: in the likely case it prevents usb_hub_process_deferred from immediate
|
|
; issuing of another requests (which would be just waste of time);
|
|
; in the unlikely case it is still correct (although slightly increases
|
|
; the debounce interval).
|
|
cmp dword [edx+ecx*4], -1
|
|
jz .nothing
|
|
call usb_hub_store_connected_time
|
|
jmp .nothing
|
|
.reset:
|
|
; 5. The device remained connected for the entire debounce interval;
|
|
; we can proceed with initialization.
|
|
; Clear connected time for this port and notify usb_hub_process_deferred that
|
|
; the new port is waiting for reset.
|
|
or dword [edx+ecx*4], -1
|
|
or [eax+usb_hub.Actions], HUB_RESET_IN_PROGRESS + HUB_RESET_WAITING
|
|
.nothing:
|
|
pop esi ; restore used register to be stdcall
|
|
ret
|
|
endp
|
|
|
|
; This procedure is called when the request to query port status
|
|
; initiated by usb_hub_process_deferred for testing reset status is completed,
|
|
; either successfully or unsuccessfully.
|
|
proc usb_hub_resetting_port_status stdcall, pipe:dword, status:dword, buffer:dword, length:dword, calldata:dword
|
|
; 1. If the request has failed, do nothing.
|
|
cmp [status], 0
|
|
jnz .nothing
|
|
; 2. If reset signalling is still active, do nothing.
|
|
mov eax, [calldata]
|
|
; movzx ecx, [eax+usb_hub.ConfigBuffer+4]
|
|
; dec ecx
|
|
; DEBUGF 1,'K : hub %x port %d ResetStatusData = %x change = %x\n',eax,ecx,[eax+usb_hub.ResetStatusData]:4,[eax+usb_hub.ResetStatusChange]:4
|
|
test byte [eax+usb_hub.ResetStatusData], 1 shl PORT_RESET
|
|
jnz .nothing
|
|
; 3. Store the current time to start reset recovery interval
|
|
; and clear 'reset signalling active' flag.
|
|
mov edx, [timer_ticks]
|
|
mov [eax+usb_hub.ResetTime], edx
|
|
and [eax+usb_hub.Actions], not HUB_RESET_SIGNAL
|
|
; 4. If the device has not been disconnected, set 'reset recovery active' bit.
|
|
; Otherwise, terminate reset process.
|
|
test byte [eax+usb_hub.ResetStatusChange], 1 shl PORT_CONNECTION
|
|
jnz .disconnected
|
|
or [eax+usb_hub.Actions], HUB_RESET_RECOVERY
|
|
.common:
|
|
; In any case, clear change of resetting status.
|
|
lea edx, [eax+usb_hub.ConfigBuffer]
|
|
mov cl, C_PORT_RESET
|
|
call usb_hub_clear_port_change.buffer
|
|
.nothing:
|
|
ret
|
|
.disconnected:
|
|
call usb_hub_reset_aborted
|
|
jmp .common
|
|
endp
|
|
|
|
; Helper procedure for usb_hub_process_deferred. Initiates reset signalling
|
|
; on the current port (given by 1-based value [ConfigBuffer+4]).
|
|
; esi -> usb_hub, eax -> usb_controller
|
|
proc usb_hub_initiate_reset
|
|
; 1. Store hub+port data in the controller structure.
|
|
movzx ecx, [esi+usb_hub.ConfigBuffer+4]
|
|
dec ecx
|
|
mov [eax+usb_controller.ResettingPort], cl
|
|
mov [eax+usb_controller.ResettingHub], esi
|
|
; 2. Store the current time and set 'reset signalling active' flag.
|
|
mov eax, [timer_ticks]
|
|
mov [esi+usb_hub.ResetTime], eax
|
|
and [esi+usb_hub.Actions], not HUB_RESET_WAITING
|
|
or [esi+usb_hub.Actions], HUB_RESET_SIGNAL
|
|
; 3. Send request to the hub to initiate request signalling.
|
|
lea edx, [esi+usb_hub.ConfigBuffer]
|
|
; DEBUGF 1,'K : [%d] hub %x port %d initiate reset\n',[timer_ticks],esi,ecx
|
|
mov dword [edx], 23h + \
|
|
(USB_SET_FEATURE shl 8) + \
|
|
(PORT_RESET shl 16)
|
|
and dword [edx+4], 0xFF
|
|
stdcall usb_control_async, [esi+usb_hub.ConfigPipe], edx, 0, 0, usb_hub_reset_started, esi, 0
|
|
test eax, eax
|
|
jnz @f
|
|
mov eax, esi
|
|
call usb_hub_reset_aborted
|
|
@@:
|
|
ret
|
|
endp
|
|
|
|
; This procedure is called when the request to start reset signalling initiated
|
|
; by usb_hub_initiate_reset is completed, either successfully or unsuccessfully.
|
|
proc usb_hub_reset_started stdcall, pipe:dword, status:dword, buffer:dword, length:dword, calldata:dword
|
|
; If the request is successful, do nothing.
|
|
; Otherwise, clear 'reset signalling' flag and abort reset process.
|
|
mov eax, [calldata]
|
|
; movzx ecx, [eax+usb_hub.ConfigBuffer+4]
|
|
; dec ecx
|
|
; DEBUGF 1,'K : [%d] hub %x port %d reset started\n',[timer_ticks],eax,ecx
|
|
cmp [status], 0
|
|
jz .nothing
|
|
and [eax+usb_hub.Actions], not HUB_RESET_SIGNAL
|
|
dbgstr 'Failed to reset hub port'
|
|
call usb_hub_reset_aborted
|
|
.nothing:
|
|
ret
|
|
endp
|
|
|
|
; This procedure is called by the protocol layer if something has failed during
|
|
; initial stages of the configuration process, so the device should be disabled
|
|
; at hub level.
|
|
proc usb_hub_disable_resetting_port
|
|
and [eax+usb_hub.Actions], not HUB_RESET_IN_PROGRESS
|
|
; movzx ecx, [eax+usb_hub.ConfigBuffer+4]
|
|
; dec ecx
|
|
; DEBUGF 1,'K : [%d] hub %x port %d disable\n',[timer_ticks],eax,ecx
|
|
lea edx, [eax+usb_hub.ConfigBuffer]
|
|
mov cl, PORT_ENABLE
|
|
jmp usb_hub_clear_port_change.buffer
|
|
endp
|
|
|
|
; This procedure is called when the hub is disconnected.
|
|
proc usb_hub_disconnect
|
|
virtual at esp
|
|
dd ? ; return address
|
|
.hubdata dd ?
|
|
end virtual
|
|
; 1. If the hub is disconnected during initial configuration,
|
|
; 1 is stored as hub data and there is nothing to do.
|
|
mov eax, [.hubdata]
|
|
cmp eax, 1
|
|
jz .nothing
|
|
; 2. Remove the hub from the overall list.
|
|
mov ecx, [eax+usb_hub.Next]
|
|
mov edx, [eax+usb_hub.Prev]
|
|
mov [ecx+usb_hub.Prev], edx
|
|
mov [edx+usb_hub.Next], ecx
|
|
; 3. If some child is in reset process, abort reset.
|
|
push esi
|
|
mov esi, [eax+usb_hub.Controller]
|
|
cmp [esi+usb_controller.ResettingHub], eax
|
|
jnz @f
|
|
cmp [esi+usb_controller.ResettingPort], -1
|
|
jz @f
|
|
push eax
|
|
call usb_test_pending_port
|
|
pop eax
|
|
@@:
|
|
pop esi
|
|
; 4. Loop over all children and notify other code that they were disconnected.
|
|
push ebx
|
|
xor ecx, ecx
|
|
.disconnect_children:
|
|
mov ebx, [eax+usb_hub.ConnectedDevicesPtr]
|
|
mov ebx, [ebx+ecx*4]
|
|
test ebx, ebx
|
|
jz @f
|
|
push eax ecx
|
|
call usb_device_disconnected
|
|
pop ecx eax
|
|
@@:
|
|
inc ecx
|
|
cmp ecx, [eax+usb_hub.NumPorts]
|
|
jb .disconnect_children
|
|
; 4. Free memory allocated for the hub data.
|
|
call free
|
|
pop ebx
|
|
.nothing:
|
|
retn 4
|
|
endp
|