Revision ed3a328d usb-linux.c
| b/usb-linux.c | ||
|---|---|---|
| 823 | 823 |
return configuration; |
| 824 | 824 |
} |
| 825 | 825 |
|
| 826 |
static uint8_t usb_linux_get_alt_setting(USBHostDevice *s, |
|
| 827 |
uint8_t configuration, uint8_t interface) |
|
| 828 |
{
|
|
| 829 |
uint8_t alt_setting; |
|
| 830 |
struct usb_ctrltransfer ct; |
|
| 831 |
int ret; |
|
| 832 |
|
|
| 833 |
ct.bRequestType = USB_DIR_IN | USB_RECIP_INTERFACE; |
|
| 834 |
ct.bRequest = USB_REQ_GET_INTERFACE; |
|
| 835 |
ct.wValue = 0; |
|
| 836 |
ct.wIndex = interface; |
|
| 837 |
ct.wLength = 1; |
|
| 838 |
ct.data = &alt_setting; |
|
| 839 |
ct.timeout = 50; |
|
| 840 |
ret = ioctl(s->fd, USBDEVFS_CONTROL, &ct); |
|
| 841 |
if (ret < 0) {
|
|
| 842 |
/* Assume alt 0 on error */ |
|
| 843 |
return 0; |
|
| 844 |
} |
|
| 845 |
|
|
| 846 |
return alt_setting; |
|
| 847 |
} |
|
| 848 |
|
|
| 826 | 849 |
/* returns 1 on problem encountered or 0 for success */ |
| 827 | 850 |
static int usb_linux_update_endp_table(USBHostDevice *s) |
| 828 | 851 |
{
|
| 829 | 852 |
uint8_t *descriptors; |
| 830 | 853 |
uint8_t devep, type, configuration, alt_interface; |
| 831 |
struct usb_ctrltransfer ct; |
|
| 832 |
int interface, ret, length, i; |
|
| 854 |
int interface, length, i; |
|
| 833 | 855 |
|
| 834 | 856 |
i = usb_linux_get_configuration(s); |
| 835 | 857 |
if (i < 0) |
| ... | ... | |
| 858 | 880 |
} |
| 859 | 881 |
|
| 860 | 882 |
interface = descriptors[i + 2]; |
| 861 |
|
|
| 862 |
ct.bRequestType = USB_DIR_IN | USB_RECIP_INTERFACE; |
|
| 863 |
ct.bRequest = USB_REQ_GET_INTERFACE; |
|
| 864 |
ct.wValue = 0; |
|
| 865 |
ct.wIndex = interface; |
|
| 866 |
ct.wLength = 1; |
|
| 867 |
ct.data = &alt_interface; |
|
| 868 |
ct.timeout = 50; |
|
| 869 |
|
|
| 870 |
ret = ioctl(s->fd, USBDEVFS_CONTROL, &ct); |
|
| 871 |
if (ret < 0) {
|
|
| 872 |
alt_interface = interface; |
|
| 873 |
} |
|
| 883 |
alt_interface = usb_linux_get_alt_setting(s, configuration, interface); |
|
| 874 | 884 |
|
| 875 | 885 |
/* the current interface descriptor is the active interface |
| 876 | 886 |
* and has endpoints */ |
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