From 3aae590108131671c7d107d8d69744a7ba5da770 Mon Sep 17 00:00:00 2001 From: thompsa Date: Fri, 29 Jan 2010 02:44:06 +0000 Subject: Add a function to check if the usb devices is still connected. Submitted by: Hans Petter Selasky --- lib/libusb/libusb20_ugen20.c | 20 ++++++++++++++++++++ 1 file changed, 20 insertions(+) (limited to 'lib/libusb/libusb20_ugen20.c') diff --git a/lib/libusb/libusb20_ugen20.c b/lib/libusb/libusb20_ugen20.c index efcca63..892ba0e 100644 --- a/lib/libusb/libusb20_ugen20.c +++ b/lib/libusb/libusb20_ugen20.c @@ -67,6 +67,7 @@ static libusb20_get_config_index_t ugen20_get_config_index; static libusb20_set_config_index_t ugen20_set_config_index; static libusb20_set_alt_index_t ugen20_set_alt_index; static libusb20_reset_device_t ugen20_reset_device; +static libusb20_check_connected_t ugen20_check_connected; static libusb20_set_power_mode_t ugen20_set_power_mode; static libusb20_get_power_mode_t ugen20_get_power_mode; static libusb20_kernel_driver_active_t ugen20_kernel_driver_active; @@ -553,6 +554,25 @@ ugen20_reset_device(struct libusb20_device *pdev) } static int +ugen20_check_connected(struct libusb20_device *pdev) +{ + uint32_t plugtime; + int error = 0; + + if (ioctl(pdev->file_ctrl, USB_GET_PLUGTIME, &plugtime)) { + error = LIBUSB20_ERROR_NO_DEVICE; + goto done; + } + + if (pdev->session_data.plugtime != plugtime) { + error = LIBUSB20_ERROR_NO_DEVICE; + goto done; + } +done: + return (error); +} + +static int ugen20_set_power_mode(struct libusb20_device *pdev, uint8_t power_mode) { int temp; -- cgit v1.1