#ifndef US122L_H #define US122L_H struct us122l { struct snd_usb_audio chip; int stride; struct usb_stream_kernel sk; struct mutex mutex; struct file *first; unsigned second_periods_polled; struct file *master; struct file *slave; struct list_head midi_list; atomic_t mmap_count; }; #define US122L(c) ((struct us122l *)(c)->private_data) #define NAME_ALLCAPS "US-122L" #define USB_ID_US122L 0x800E #define USB_ID_US144 0x800F #endif