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gadget_chips.h
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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 
41 static inline bool gadget_supports_altsettings(struct usb_gadget *gadget)
42 {
43  /* PXA 21x/25x/26x has no altsettings at all */
44  if (gadget_is_pxa(gadget))
45  return false;
46 
47  /* PXA 27x and 3xx have *broken* altsetting support */
48  if (gadget_is_pxa27x(gadget))
49  return false;
50 
51  /* Everything else is *presumably* fine ... */
52  return true;
53 }
54 
55 #endif /* __GADGET_CHIPS_H */