drivers/usb/gadget/gadget_chips.h

   1 /*
   2  * USB device controllers have lots of quirks.  Use these macros in
   3  * gadget drivers or other code that needs to deal with them, and which
   4  * autoconfigures instead of using early binding to the hardware.
   5  *
   6  * This SHOULD eventually work like the ARM mach_is_*() stuff, driven by
   7  * some config file that gets updated as new hardware is supported.
   8  * (And avoiding all runtime comparisons in typical one-choice configs!)
   9  *
  10  * NOTE:  some of these controller drivers may not be available yet.
  11  * Some are available on 2.4 kernels; several are available, but not
  12  * yet pushed in the 2.6 mainline tree.
  13  */
  14
  15 #ifndef __GADGET_CHIPS_H
  16 #define __GADGET_CHIPS_H
  17
  18 #include <linux/usb/gadget.h>
  19
  20 /*
  21  * NOTICE: the entries below are alphabetical and should be kept
  22  * that way.
  23  *
  24  * Always be sure to add new entries to the correct position or
  25  * accept the bashing later.
  26  *
  27  * If you have forgotten the alphabetical order let VIM/EMACS
  28  * do that for you.
  29  */
  30 #define gadget_is_at91(g)               (!strcmp("at91_udc", (g)->name))
  31 #define gadget_is_goku(g)               (!strcmp("goku_udc", (g)->name))
  32 #define gadget_is_musbhdrc(g)           (!strcmp("musb-hdrc", (g)->name))
  33 #define gadget_is_net2280(g)            (!strcmp("net2280", (g)->name))
  34 #define gadget_is_pxa(g)                (!strcmp("pxa25x_udc", (g)->name))
  35 #define gadget_is_pxa27x(g)             (!strcmp("pxa27x_udc", (g)->name))
  36 #define gadget_is_mtk(g)                (!strcmp("mt_usb", (g)->name))
  37
  38 /**
  39  * gadget_supports_altsettings - return true if altsettings work
  40  * @gadget: the gadget in question
  41  */
  42 static inline bool gadget_supports_altsettings(struct usb_gadget *gadget)
  43 {
  44         /* PXA 21x/25x/26x has no altsettings at all */
  45         if (gadget_is_pxa(gadget))
  46                 return false;
  47
  48         /* PXA 27x and 3xx have *broken* altsetting support */
  49         if (gadget_is_pxa27x(gadget))
  50                 return false;
  51
  52         /* Everything else is *presumably* fine ... */
  53         return true;
  54 }
  55
  56 #endif /* __GADGET_CHIPS_H */