diff options
Diffstat (limited to 'libusb/os/wince_usb.c')
| -rw-r--r-- | libusb/os/wince_usb.c | 888 |
1 files changed, 0 insertions, 888 deletions
diff --git a/libusb/os/wince_usb.c b/libusb/os/wince_usb.c deleted file mode 100644 index a0f35e9..0000000 --- a/libusb/os/wince_usb.c +++ /dev/null @@ -1,888 +0,0 @@ -/* - * Windows CE backend for libusb 1.0 - * Copyright © 2011-2013 RealVNC Ltd. - * Large portions taken from Windows backend, which is - * Copyright © 2009-2010 Pete Batard <pbatard@gmail.com> - * With contributions from Michael Plante, Orin Eman et al. - * Parts of this code adapted from libusb-win32-v1 by Stephan Meyer - * Major code testing contribution by Xiaofan Chen - * - * This library is free software; you can redistribute it and/or - * modify it under the terms of the GNU Lesser General Public - * License as published by the Free Software Foundation; either - * version 2.1 of the License, or (at your option) any later version. - * - * This library is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * Lesser General Public License for more details. - * - * You should have received a copy of the GNU Lesser General Public - * License along with this library; if not, write to the Free Software - * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA - */ - -#include <config.h> - -#include <stdint.h> -#include <inttypes.h> - -#include "libusbi.h" -#include "wince_usb.h" - -// Global variables -int errno = 0; -static uint64_t hires_frequency, hires_ticks_to_ps; -static HANDLE driver_handle = INVALID_HANDLE_VALUE; -static int concurrent_usage = -1; - -/* - * Converts a windows error to human readable string - * uses retval as errorcode, or, if 0, use GetLastError() - */ -#if defined(ENABLE_LOGGING) -static const char *windows_error_str(DWORD error_code) -{ - static TCHAR wErr_string[ERR_BUFFER_SIZE]; - static char err_string[ERR_BUFFER_SIZE]; - - DWORD size; - int len; - - if (error_code == 0) - error_code = GetLastError(); - - len = sprintf(err_string, "[%u] ", (unsigned int)error_code); - - size = FormatMessage(FORMAT_MESSAGE_FROM_SYSTEM|FORMAT_MESSAGE_IGNORE_INSERTS, - NULL, error_code, MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), - wErr_string, ERR_BUFFER_SIZE, NULL); - if (size == 0) { - DWORD format_error = GetLastError(); - if (format_error) - snprintf(err_string, ERR_BUFFER_SIZE, - "Windows error code %u (FormatMessage error code %u)", - (unsigned int)error_code, (unsigned int)format_error); - else - snprintf(err_string, ERR_BUFFER_SIZE, "Unknown error code %u", (unsigned int)error_code); - } else { - // Remove CR/LF terminators, if present - size_t pos = size - 2; - if (wErr_string[pos] == 0x0D) - wErr_string[pos] = 0; - - if (!WideCharToMultiByte(CP_ACP, 0, wErr_string, -1, &err_string[len], ERR_BUFFER_SIZE - len, NULL, NULL)) - strcpy(err_string, "Unable to convert error string"); - } - - return err_string; -} -#endif - -static struct wince_device_priv *_device_priv(struct libusb_device *dev) -{ - return (struct wince_device_priv *)dev->os_priv; -} - -// ceusbkwrapper to libusb error code mapping -static int translate_driver_error(DWORD error) -{ - switch (error) { - case ERROR_INVALID_PARAMETER: - return LIBUSB_ERROR_INVALID_PARAM; - case ERROR_CALL_NOT_IMPLEMENTED: - case ERROR_NOT_SUPPORTED: - return LIBUSB_ERROR_NOT_SUPPORTED; - case ERROR_NOT_ENOUGH_MEMORY: - return LIBUSB_ERROR_NO_MEM; - case ERROR_INVALID_HANDLE: - return LIBUSB_ERROR_NO_DEVICE; - case ERROR_BUSY: - return LIBUSB_ERROR_BUSY; - - // Error codes that are either unexpected, or have - // no suitable LIBUSB_ERROR equivalent. - case ERROR_CANCELLED: - case ERROR_INTERNAL_ERROR: - default: - return LIBUSB_ERROR_OTHER; - } -} - -static BOOL init_dllimports(void) -{ - DLL_GET_HANDLE(ceusbkwrapper); - DLL_LOAD_FUNC(ceusbkwrapper, UkwOpenDriver, TRUE); - DLL_LOAD_FUNC(ceusbkwrapper, UkwGetDeviceList, TRUE); - DLL_LOAD_FUNC(ceusbkwrapper, UkwReleaseDeviceList, TRUE); - DLL_LOAD_FUNC(ceusbkwrapper, UkwGetDeviceAddress, TRUE); - DLL_LOAD_FUNC(ceusbkwrapper, UkwGetDeviceDescriptor, TRUE); - DLL_LOAD_FUNC(ceusbkwrapper, UkwGetConfigDescriptor, TRUE); - DLL_LOAD_FUNC(ceusbkwrapper, UkwCloseDriver, TRUE); - DLL_LOAD_FUNC(ceusbkwrapper, UkwCancelTransfer, TRUE); - DLL_LOAD_FUNC(ceusbkwrapper, UkwIssueControlTransfer, TRUE); - DLL_LOAD_FUNC(ceusbkwrapper, UkwClaimInterface, TRUE); - DLL_LOAD_FUNC(ceusbkwrapper, UkwReleaseInterface, TRUE); - DLL_LOAD_FUNC(ceusbkwrapper, UkwSetInterfaceAlternateSetting, TRUE); - DLL_LOAD_FUNC(ceusbkwrapper, UkwClearHaltHost, TRUE); - DLL_LOAD_FUNC(ceusbkwrapper, UkwClearHaltDevice, TRUE); - DLL_LOAD_FUNC(ceusbkwrapper, UkwGetConfig, TRUE); - DLL_LOAD_FUNC(ceusbkwrapper, UkwSetConfig, TRUE); - DLL_LOAD_FUNC(ceusbkwrapper, UkwResetDevice, TRUE); - DLL_LOAD_FUNC(ceusbkwrapper, UkwKernelDriverActive, TRUE); - DLL_LOAD_FUNC(ceusbkwrapper, UkwAttachKernelDriver, TRUE); - DLL_LOAD_FUNC(ceusbkwrapper, UkwDetachKernelDriver, TRUE); - DLL_LOAD_FUNC(ceusbkwrapper, UkwIssueBulkTransfer, TRUE); - DLL_LOAD_FUNC(ceusbkwrapper, UkwIsPipeHalted, TRUE); - - return TRUE; -} - -static void exit_dllimports(void) -{ - DLL_FREE_HANDLE(ceusbkwrapper); -} - -static int init_device( - struct libusb_device *dev, UKW_DEVICE drv_dev, - unsigned char bus_addr, unsigned char dev_addr) -{ - struct wince_device_priv *priv = _device_priv(dev); - int r = LIBUSB_SUCCESS; - - dev->bus_number = bus_addr; - dev->device_address = dev_addr; - priv->dev = drv_dev; - - if (!UkwGetDeviceDescriptor(priv->dev, &(priv->desc))) - r = translate_driver_error(GetLastError()); - - return r; -} - -// Internal API functions -static int wince_init(struct libusb_context *ctx) -{ - int r = LIBUSB_ERROR_OTHER; - HANDLE semaphore; - LARGE_INTEGER li_frequency; - TCHAR sem_name[11 + 8 + 1]; // strlen("libusb_init") + (32-bit hex PID) + '\0' - - _stprintf(sem_name, _T("libusb_init%08X"), (unsigned int)(GetCurrentProcessId() & 0xFFFFFFFF)); - semaphore = CreateSemaphore(NULL, 1, 1, sem_name); - if (semaphore == NULL) { - usbi_err(ctx, "could not create semaphore: %s", windows_error_str(0)); - return LIBUSB_ERROR_NO_MEM; - } - - // A successful wait brings our semaphore count to 0 (unsignaled) - // => any concurent wait stalls until the semaphore's release - if (WaitForSingleObject(semaphore, INFINITE) != WAIT_OBJECT_0) { - usbi_err(ctx, "failure to access semaphore: %s", windows_error_str(0)); - CloseHandle(semaphore); - return LIBUSB_ERROR_NO_MEM; - } - - // NB: concurrent usage supposes that init calls are equally balanced with - // exit calls. If init is called more than exit, we will not exit properly - if ( ++concurrent_usage == 0 ) { // First init? - // Load DLL imports - if (!init_dllimports()) { - usbi_err(ctx, "could not resolve DLL functions"); - r = LIBUSB_ERROR_NOT_SUPPORTED; - goto init_exit; - } - - // try to open a handle to the driver - driver_handle = UkwOpenDriver(); - if (driver_handle == INVALID_HANDLE_VALUE) { - usbi_err(ctx, "could not connect to driver"); - r = LIBUSB_ERROR_NOT_SUPPORTED; - goto init_exit; - } - - // find out if we have access to a monotonic (hires) timer - if (QueryPerformanceFrequency(&li_frequency)) { - hires_frequency = li_frequency.QuadPart; - // The hires frequency can go as high as 4 GHz, so we'll use a conversion - // to picoseconds to compute the tv_nsecs part in clock_gettime - hires_ticks_to_ps = UINT64_C(1000000000000) / hires_frequency; - usbi_dbg("hires timer available (Frequency: %"PRIu64" Hz)", hires_frequency); - } else { - usbi_dbg("no hires timer available on this platform"); - hires_frequency = 0; - hires_ticks_to_ps = UINT64_C(0); - } - } - // At this stage, either we went through full init successfully, or didn't need to - r = LIBUSB_SUCCESS; - -init_exit: // Holds semaphore here. - if (!concurrent_usage && r != LIBUSB_SUCCESS) { // First init failed? - exit_dllimports(); - - if (driver_handle != INVALID_HANDLE_VALUE) { - UkwCloseDriver(driver_handle); - driver_handle = INVALID_HANDLE_VALUE; - } - } - - if (r != LIBUSB_SUCCESS) - --concurrent_usage; // Not expected to call libusb_exit if we failed. - - ReleaseSemaphore(semaphore, 1, NULL); // increase count back to 1 - CloseHandle(semaphore); - return r; -} - -static void wince_exit(struct libusb_context *ctx) -{ - HANDLE semaphore; - TCHAR sem_name[11 + 8 + 1]; // strlen("libusb_init") + (32-bit hex PID) + '\0' - UNUSED(ctx); - - _stprintf(sem_name, _T("libusb_init%08X"), (unsigned int)(GetCurrentProcessId() & 0xFFFFFFFF)); - semaphore = CreateSemaphore(NULL, 1, 1, sem_name); - if (semaphore == NULL) - return; - - // A successful wait brings our semaphore count to 0 (unsignaled) - // => any concurent wait stalls until the semaphore release - if (WaitForSingleObject(semaphore, INFINITE) != WAIT_OBJECT_0) { - CloseHandle(semaphore); - return; - } - - // Only works if exits and inits are balanced exactly - if (--concurrent_usage < 0) { // Last exit - exit_dllimports(); - - if (driver_handle != INVALID_HANDLE_VALUE) { - UkwCloseDriver(driver_handle); - driver_handle = INVALID_HANDLE_VALUE; - } - } - - ReleaseSemaphore(semaphore, 1, NULL); // increase count back to 1 - CloseHandle(semaphore); -} - -static int wince_get_device_list( - struct libusb_context *ctx, - struct discovered_devs **discdevs) -{ - UKW_DEVICE devices[MAX_DEVICE_COUNT]; - struct discovered_devs *new_devices = *discdevs; - DWORD count = 0, i; - struct libusb_device *dev = NULL; - unsigned char bus_addr, dev_addr; - unsigned long session_id; - BOOL success; - DWORD release_list_offset = 0; - int r = LIBUSB_SUCCESS; - - success = UkwGetDeviceList(driver_handle, devices, MAX_DEVICE_COUNT, &count); - if (!success) { - int libusbErr = translate_driver_error(GetLastError()); - usbi_err(ctx, "could not get devices: %s", windows_error_str(0)); - return libusbErr; - } - - for (i = 0; i < count; ++i) { - release_list_offset = i; - success = UkwGetDeviceAddress(devices[i], &bus_addr, &dev_addr, &session_id); - if (!success) { - r = translate_driver_error(GetLastError()); - usbi_err(ctx, "could not get device address for %u: %s", (unsigned int)i, windows_error_str(0)); - goto err_out; - } - - dev = usbi_get_device_by_session_id(ctx, session_id); - if (dev) { - usbi_dbg("using existing device for %u/%u (session %lu)", - bus_addr, dev_addr, session_id); - // Release just this element in the device list (as we already hold a - // reference to it). - UkwReleaseDeviceList(driver_handle, &devices[i], 1); - release_list_offset++; - } else { - usbi_dbg("allocating new device for %u/%u (session %lu)", - bus_addr, dev_addr, session_id); - dev = usbi_alloc_device(ctx, session_id); - if (!dev) { - r = LIBUSB_ERROR_NO_MEM; - goto err_out; - } - - r = init_device(dev, devices[i], bus_addr, dev_addr); - if (r < 0) - goto err_out; - - r = usbi_sanitize_device(dev); - if (r < 0) - goto err_out; - } - - new_devices = discovered_devs_append(new_devices, dev); - if (!new_devices) { - r = LIBUSB_ERROR_NO_MEM; - goto err_out; - } - - libusb_unref_device(dev); - } - - *discdevs = new_devices; - return r; -err_out: - *discdevs = new_devices; - libusb_unref_device(dev); - // Release the remainder of the unprocessed device list. - // The devices added to new_devices already will still be passed up to libusb, - // which can dispose of them at its leisure. - UkwReleaseDeviceList(driver_handle, &devices[release_list_offset], count - release_list_offset); - return r; -} - -static int wince_open(struct libusb_device_handle *handle) -{ - // Nothing to do to open devices as a handle to it has - // been retrieved by wince_get_device_list - return LIBUSB_SUCCESS; -} - -static void wince_close(struct libusb_device_handle *handle) -{ - // Nothing to do as wince_open does nothing. -} - -static int wince_get_device_descriptor( - struct libusb_device *device, - unsigned char *buffer, int *host_endian) -{ - struct wince_device_priv *priv = _device_priv(device); - - *host_endian = 1; - memcpy(buffer, &priv->desc, DEVICE_DESC_LENGTH); - return LIBUSB_SUCCESS; -} - -static int wince_get_active_config_descriptor( - struct libusb_device *device, - unsigned char *buffer, size_t len, int *host_endian) -{ - struct wince_device_priv *priv = _device_priv(device); - DWORD actualSize = len; - - *host_endian = 0; - if (!UkwGetConfigDescriptor(priv->dev, UKW_ACTIVE_CONFIGURATION, buffer, len, &actualSize)) - return translate_driver_error(GetLastError()); - - return actualSize; -} - -static int wince_get_config_descriptor( - struct libusb_device *device, - uint8_t config_index, - unsigned char *buffer, size_t len, int *host_endian) -{ - struct wince_device_priv *priv = _device_priv(device); - DWORD actualSize = len; - - *host_endian = 0; - if (!UkwGetConfigDescriptor(priv->dev, config_index, buffer, len, &actualSize)) - return translate_driver_error(GetLastError()); - - return actualSize; -} - -static int wince_get_configuration( - struct libusb_device_handle *handle, - int *config) -{ - struct wince_device_priv *priv = _device_priv(handle->dev); - UCHAR cv = 0; - - if (!UkwGetConfig(priv->dev, &cv)) - return translate_driver_error(GetLastError()); - - (*config) = cv; - return LIBUSB_SUCCESS; -} - -static int wince_set_configuration( - struct libusb_device_handle *handle, - int config) -{ - struct wince_device_priv *priv = _device_priv(handle->dev); - // Setting configuration 0 places the device in Address state. - // This should correspond to the "unconfigured state" required by - // libusb when the specified configuration is -1. - UCHAR cv = (config < 0) ? 0 : config; - if (!UkwSetConfig(priv->dev, cv)) - return translate_driver_error(GetLastError()); - - return LIBUSB_SUCCESS; -} - -static int wince_claim_interface( - struct libusb_device_handle *handle, - int interface_number) -{ - struct wince_device_priv *priv = _device_priv(handle->dev); - - if (!UkwClaimInterface(priv->dev, interface_number)) - return translate_driver_error(GetLastError()); - - return LIBUSB_SUCCESS; -} - -static int wince_release_interface( - struct libusb_device_handle *handle, - int interface_number) -{ - struct wince_device_priv *priv = _device_priv(handle->dev); - - if (!UkwSetInterfaceAlternateSetting(priv->dev, interface_number, 0)) - return translate_driver_error(GetLastError()); - - if (!UkwReleaseInterface(priv->dev, interface_number)) - return translate_driver_error(GetLastError()); - - return LIBUSB_SUCCESS; -} - -static int wince_set_interface_altsetting( - struct libusb_device_handle *handle, - int interface_number, int altsetting) -{ - struct wince_device_priv *priv = _device_priv(handle->dev); - - if (!UkwSetInterfaceAlternateSetting(priv->dev, interface_number, altsetting)) - return translate_driver_error(GetLastError()); - - return LIBUSB_SUCCESS; -} - -static int wince_clear_halt( - struct libusb_device_handle *handle, - unsigned char endpoint) -{ - struct wince_device_priv *priv = _device_priv(handle->dev); - - if (!UkwClearHaltHost(priv->dev, endpoint)) - return translate_driver_error(GetLastError()); - - if (!UkwClearHaltDevice(priv->dev, endpoint)) - return translate_driver_error(GetLastError()); - - return LIBUSB_SUCCESS; -} - -static int wince_reset_device( - struct libusb_device_handle *handle) -{ - struct wince_device_priv *priv = _device_priv(handle->dev); - - if (!UkwResetDevice(priv->dev)) - return translate_driver_error(GetLastError()); - - return LIBUSB_SUCCESS; -} - -static int wince_kernel_driver_active( - struct libusb_device_handle *handle, - int interface_number) -{ - struct wince_device_priv *priv = _device_priv(handle->dev); - BOOL result = FALSE; - - if (!UkwKernelDriverActive(priv->dev, interface_number, &result)) - return translate_driver_error(GetLastError()); - - return result ? 1 : 0; -} - -static int wince_detach_kernel_driver( - struct libusb_device_handle *handle, - int interface_number) -{ - struct wince_device_priv *priv = _device_priv(handle->dev); - - if (!UkwDetachKernelDriver(priv->dev, interface_number)) - return translate_driver_error(GetLastError()); - - return LIBUSB_SUCCESS; -} - -static int wince_attach_kernel_driver( - struct libusb_device_handle *handle, - int interface_number) -{ - struct wince_device_priv *priv = _device_priv(handle->dev); - - if (!UkwAttachKernelDriver(priv->dev, interface_number)) - return translate_driver_error(GetLastError()); - - return LIBUSB_SUCCESS; -} - -static void wince_destroy_device(struct libusb_device *dev) -{ - struct wince_device_priv *priv = _device_priv(dev); - - UkwReleaseDeviceList(driver_handle, &priv->dev, 1); -} - -static void wince_clear_transfer_priv(struct usbi_transfer *itransfer) -{ - struct wince_transfer_priv *transfer_priv = usbi_transfer_get_os_priv(itransfer); - - usbi_close(transfer_priv->pollable_fd.fd); - transfer_priv->pollable_fd = INVALID_WINFD; -} - -static int wince_cancel_transfer(struct usbi_transfer *itransfer) -{ - struct libusb_transfer *transfer = USBI_TRANSFER_TO_LIBUSB_TRANSFER(itransfer); - struct wince_device_priv *priv = _device_priv(transfer->dev_handle->dev); - struct wince_transfer_priv *transfer_priv = usbi_transfer_get_os_priv(itransfer); - - if (!UkwCancelTransfer(priv->dev, transfer_priv->pollable_fd.overlapped, UKW_TF_NO_WAIT)) - return translate_driver_error(GetLastError()); - - return LIBUSB_SUCCESS; -} - -static int wince_submit_control_or_bulk_transfer(struct usbi_transfer *itransfer) -{ - struct libusb_transfer *transfer = USBI_TRANSFER_TO_LIBUSB_TRANSFER(itransfer); - struct libusb_context *ctx = DEVICE_CTX(transfer->dev_handle->dev); - struct wince_transfer_priv *transfer_priv = usbi_transfer_get_os_priv(itransfer); - struct wince_device_priv *priv = _device_priv(transfer->dev_handle->dev); - BOOL direction_in, ret; - struct winfd wfd; - DWORD flags; - PUKW_CONTROL_HEADER setup = NULL; - const BOOL control_transfer = transfer->type == LIBUSB_TRANSFER_TYPE_CONTROL; - int r; - - if (control_transfer) { - setup = (PUKW_CONTROL_HEADER) transfer->buffer; - direction_in = setup->bmRequestType & LIBUSB_ENDPOINT_IN; - } else { - direction_in = transfer->endpoint & LIBUSB_ENDPOINT_IN; - } - flags = direction_in ? UKW_TF_IN_TRANSFER : UKW_TF_OUT_TRANSFER; - flags |= UKW_TF_SHORT_TRANSFER_OK; - - wfd = usbi_create_fd(); - if (wfd.fd < 0) - return LIBUSB_ERROR_NO_MEM; - - r = usbi_add_pollfd(ctx, wfd.fd, direction_in ? POLLIN : POLLOUT); - if (r) { - usbi_close(wfd.fd); - return r; - } - - transfer_priv->pollable_fd = wfd; - - if (control_transfer) { - // Split out control setup header and data buffer - DWORD bufLen = transfer->length - sizeof(UKW_CONTROL_HEADER); - PVOID buf = (PVOID) &transfer->buffer[sizeof(UKW_CONTROL_HEADER)]; - - ret = UkwIssueControlTransfer(priv->dev, flags, setup, buf, bufLen, &transfer->actual_length, wfd.overlapped); - } else { - ret = UkwIssueBulkTransfer(priv->dev, flags, transfer->endpoint, transfer->buffer, - transfer->length, &transfer->actual_length, wfd.overlapped); - } - - if (!ret) { - int libusbErr = translate_driver_error(GetLastError()); - usbi_err(ctx, "UkwIssue%sTransfer failed: error %u", - control_transfer ? "Control" : "Bulk", (unsigned int)GetLastError()); - usbi_remove_pollfd(ctx, wfd.fd); - usbi_close(wfd.fd); - transfer_priv->pollable_fd = INVALID_WINFD; - return libusbErr; - } - - - return LIBUSB_SUCCESS; -} - -static int wince_submit_transfer(struct usbi_transfer *itransfer) -{ - struct libusb_transfer *transfer = USBI_TRANSFER_TO_LIBUSB_TRANSFER(itransfer); - - switch (transfer->type) { - case LIBUSB_TRANSFER_TYPE_CONTROL: - case LIBUSB_TRANSFER_TYPE_BULK: - case LIBUSB_TRANSFER_TYPE_INTERRUPT: - return wince_submit_control_or_bulk_transfer(itransfer); - case LIBUSB_TRANSFER_TYPE_ISOCHRONOUS: - case LIBUSB_TRANSFER_TYPE_BULK_STREAM: - return LIBUSB_ERROR_NOT_SUPPORTED; - default: - usbi_err(TRANSFER_CTX(transfer), "unknown endpoint type %d", transfer->type); - return LIBUSB_ERROR_INVALID_PARAM; - } -} - -static void wince_transfer_callback( - struct usbi_transfer *itransfer, - uint32_t io_result, uint32_t io_size) -{ - struct libusb_transfer *transfer = USBI_TRANSFER_TO_LIBUSB_TRANSFER(itransfer); - struct wince_transfer_priv *transfer_priv = (struct wince_transfer_priv*)usbi_transfer_get_os_priv(itransfer); - struct wince_device_priv *priv = _device_priv(transfer->dev_handle->dev); - int status; - - usbi_dbg("handling I/O completion with errcode %u", io_result); - - if (io_result == ERROR_NOT_SUPPORTED && - transfer->type != LIBUSB_TRANSFER_TYPE_CONTROL) { - /* For functional stalls, the WinCE USB layer (and therefore the USB Kernel Wrapper - * Driver) will report USB_ERROR_STALL/ERROR_NOT_SUPPORTED in situations where the - * endpoint isn't actually stalled. - * - * One example of this is that some devices will occasionally fail to reply to an IN - * token. The WinCE USB layer carries on with the transaction until it is completed - * (or cancelled) but then completes it with USB_ERROR_STALL. - * - * This code therefore needs to confirm that there really is a stall error, by both - * checking the pipe status and requesting the endpoint status from the device. - */ - BOOL halted = FALSE; - usbi_dbg("checking I/O completion with errcode ERROR_NOT_SUPPORTED is really a stall"); - if (UkwIsPipeHalted(priv->dev, transfer->endpoint, &halted)) { - /* Pipe status retrieved, so now request endpoint status by sending a GET_STATUS - * control request to the device. This is done synchronously, which is a bit - * naughty, but this is a special corner case. - */ - WORD wStatus = 0; - DWORD written = 0; - UKW_CONTROL_HEADER ctrlHeader; - ctrlHeader.bmRequestType = LIBUSB_REQUEST_TYPE_STANDARD | - LIBUSB_ENDPOINT_IN | LIBUSB_RECIPIENT_ENDPOINT; - ctrlHeader.bRequest = LIBUSB_REQUEST_GET_STATUS; - ctrlHeader.wValue = 0; - ctrlHeader.wIndex = transfer->endpoint; - ctrlHeader.wLength = sizeof(wStatus); - if (UkwIssueControlTransfer(priv->dev, - UKW_TF_IN_TRANSFER | UKW_TF_SEND_TO_ENDPOINT, - &ctrlHeader, &wStatus, sizeof(wStatus), &written, NULL)) { - if (written == sizeof(wStatus) && - (wStatus & STATUS_HALT_FLAG) == 0) { - if (!halted || UkwClearHaltHost(priv->dev, transfer->endpoint)) { - usbi_dbg("Endpoint doesn't appear to be stalled, overriding error with success"); - io_result = ERROR_SUCCESS; - } else { - usbi_dbg("Endpoint doesn't appear to be stalled, but the host is halted, changing error"); - io_result = ERROR_IO_DEVICE; - } - } - } - } - } - - switch(io_result) { - case ERROR_SUCCESS: - itransfer->transferred += io_size; - status = LIBUSB_TRANSFER_COMPLETED; - break; - case ERROR_CANCELLED: - usbi_dbg("detected transfer cancel"); - status = LIBUSB_TRANSFER_CANCELLED; - break; - case ERROR_NOT_SUPPORTED: - case ERROR_GEN_FAILURE: - usbi_dbg("detected endpoint stall"); - status = LIBUSB_TRANSFER_STALL; - break; - case ERROR_SEM_TIMEOUT: - usbi_dbg("detected semaphore timeout"); - status = LIBUSB_TRANSFER_TIMED_OUT; - break; - case ERROR_OPERATION_ABORTED: - usbi_dbg("detected operation aborted"); - status = LIBUSB_TRANSFER_CANCELLED; - break; - default: - usbi_err(ITRANSFER_CTX(itransfer), "detected I/O error: %s", windows_error_str(io_result)); - status = LIBUSB_TRANSFER_ERROR; - break; - } - - wince_clear_transfer_priv(itransfer); - if (status == LIBUSB_TRANSFER_CANCELLED) - usbi_handle_transfer_cancellation(itransfer); - else - usbi_handle_transfer_completion(itransfer, (enum libusb_transfer_status)status); -} - -static void wince_handle_callback( - struct usbi_transfer *itransfer, - uint32_t io_result, uint32_t io_size) -{ - struct libusb_transfer *transfer = USBI_TRANSFER_TO_LIBUSB_TRANSFER(itransfer); - - switch (transfer->type) { - case LIBUSB_TRANSFER_TYPE_CONTROL: - case LIBUSB_TRANSFER_TYPE_BULK: - case LIBUSB_TRANSFER_TYPE_INTERRUPT: - case LIBUSB_TRANSFER_TYPE_ISOCHRONOUS: - wince_transfer_callback (itransfer, io_result, io_size); - break; - case LIBUSB_TRANSFER_TYPE_BULK_STREAM: - break; - default: - usbi_err(ITRANSFER_CTX(itransfer), "unknown endpoint type %d", transfer->type); - } -} - -static int wince_handle_events( - struct libusb_context *ctx, - struct pollfd *fds, POLL_NFDS_TYPE nfds, int num_ready) -{ - struct wince_transfer_priv* transfer_priv = NULL; - POLL_NFDS_TYPE i = 0; - BOOL found = FALSE; - struct usbi_transfer *itransfer; - DWORD io_size, io_result; - int r = LIBUSB_SUCCESS; - - usbi_mutex_lock(&ctx->open_devs_lock); - for (i = 0; i < nfds && num_ready > 0; i++) { - - usbi_dbg("checking fd %d with revents = %04x", fds[i].fd, fds[i].revents); - - if (!fds[i].revents) - continue; - - num_ready--; - - // Because a Windows OVERLAPPED is used for poll emulation, - // a pollable fd is created and stored with each transfer - usbi_mutex_lock(&ctx->flying_transfers_lock); - list_for_each_entry(itransfer, &ctx->flying_transfers, list, struct usbi_transfer) { - transfer_priv = usbi_transfer_get_os_priv(itransfer); - if (transfer_priv->pollable_fd.fd == fds[i].fd) { - found = TRUE; - break; - } - } - usbi_mutex_unlock(&ctx->flying_transfers_lock); - - if (found && HasOverlappedIoCompleted(transfer_priv->pollable_fd.overlapped)) { - io_result = (DWORD)transfer_priv->pollable_fd.overlapped->Internal; - io_size = (DWORD)transfer_priv->pollable_fd.overlapped->InternalHigh; - usbi_remove_pollfd(ctx, transfer_priv->pollable_fd.fd); - // let handle_callback free the event using the transfer wfd - // If you don't use the transfer wfd, you run a risk of trying to free a - // newly allocated wfd that took the place of the one from the transfer. - wince_handle_callback(itransfer, io_result, io_size); - } else if (found) { - usbi_err(ctx, "matching transfer for fd %d has not completed", fds[i]); - r = LIBUSB_ERROR_OTHER; - break; - } else { - usbi_err(ctx, "could not find a matching transfer for fd %d", fds[i]); - r = LIBUSB_ERROR_NOT_FOUND; - break; - } - } - usbi_mutex_unlock(&ctx->open_devs_lock); - - return r; -} - -/* - * Monotonic and real time functions - */ -static int wince_clock_gettime(int clk_id, struct timespec *tp) -{ - LARGE_INTEGER hires_counter; - ULARGE_INTEGER rtime; - FILETIME filetime; - SYSTEMTIME st; - - switch(clk_id) { - case USBI_CLOCK_MONOTONIC: - if (hires_frequency != 0 && QueryPerformanceCounter(&hires_counter)) { - tp->tv_sec = (long)(hires_counter.QuadPart / hires_frequency); - tp->tv_nsec = (long)(((hires_counter.QuadPart % hires_frequency) / 1000) * hires_ticks_to_ps); - return LIBUSB_SUCCESS; - } - // Fall through and return real-time if monotonic read failed or was not detected @ init - case USBI_CLOCK_REALTIME: - // We follow http://msdn.microsoft.com/en-us/library/ms724928%28VS.85%29.aspx - // with a predef epoch time to have an epoch that starts at 1970.01.01 00:00 - // Note however that our resolution is bounded by the Windows system time - // functions and is at best of the order of 1 ms (or, usually, worse) - GetSystemTime(&st); - SystemTimeToFileTime(&st, &filetime); - rtime.LowPart = filetime.dwLowDateTime; - rtime.HighPart = filetime.dwHighDateTime; - rtime.QuadPart -= EPOCH_TIME; - tp->tv_sec = (long)(rtime.QuadPart / 10000000); - tp->tv_nsec = (long)((rtime.QuadPart % 10000000)*100); - return LIBUSB_SUCCESS; - default: - return LIBUSB_ERROR_INVALID_PARAM; - } -} - -const struct usbi_os_backend usbi_backend = { - "Windows CE", - 0, - wince_init, - wince_exit, - NULL, /* set_option() */ - - wince_get_device_list, - NULL, /* hotplug_poll */ - wince_open, - wince_close, - - wince_get_device_descriptor, - wince_get_active_config_descriptor, - wince_get_config_descriptor, - NULL, /* get_config_descriptor_by_value() */ - - wince_get_configuration, - wince_set_configuration, - wince_claim_interface, - wince_release_interface, - - wince_set_interface_altsetting, - wince_clear_halt, - wince_reset_device, - - NULL, /* alloc_streams */ - NULL, /* free_streams */ - - NULL, /* dev_mem_alloc() */ - NULL, /* dev_mem_free() */ - - wince_kernel_driver_active, - wince_detach_kernel_driver, - wince_attach_kernel_driver, - - wince_destroy_device, - - wince_submit_transfer, - wince_cancel_transfer, - wince_clear_transfer_priv, - - wince_handle_events, - NULL, /* handle_transfer_completion() */ - - wince_clock_gettime, - 0, - sizeof(struct wince_device_priv), - 0, - sizeof(struct wince_transfer_priv), -}; 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