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 /*
  19  * NOTICE: the entries below are alphabetical and should be kept
  20  * that way.
  21  *
  22  * Always be sure to add new entries to the correct position or
  23  * accept the bashing later.
  24  *
  25  * If you have forgotten the alphabetical order let VIM/EMACS
  26  * do that for you.
  27  */
  28 #define gadget_is_amd5536udc(g)         (!strcmp("amd5536udc", (g)->name))
  29 #define gadget_is_at91(g)               (!strcmp("at91_udc", (g)->name))
  30 #define gadget_is_atmel_usba(g)         (!strcmp("atmel_usba_udc", (g)->name))
  31 #define gadget_is_ci13xxx_msm(g)        (!strcmp("ci13xxx_msm", (g)->name))
  32 #define gadget_is_ci13xxx_pci(g)        (!strcmp("ci13xxx_pci", (g)->name))
  33 #define gadget_is_dummy(g)              (!strcmp("dummy_udc", (g)->name))
  34 #define gadget_is_dwc3(g)               (!strcmp("dwc3-gadget", (g)->name))
  35 #define gadget_is_fsl_qe(g)             (!strcmp("fsl_qe_udc", (g)->name))
  36 #define gadget_is_fsl_usb2(g)           (!strcmp("fsl-usb2-udc", (g)->name))
  37 #define gadget_is_goku(g)               (!strcmp("goku_udc", (g)->name))
  38 #define gadget_is_imx(g)                (!strcmp("imx_udc", (g)->name))
  39 #define gadget_is_langwell(g)           (!strcmp("langwell_udc", (g)->name))
  40 #define gadget_is_m66592(g)             (!strcmp("m66592_udc", (g)->name))
  41 #define gadget_is_musbhdrc(g)           (!strcmp("musb-hdrc", (g)->name))
  42 #define gadget_is_net2272(g)            (!strcmp("net2272", (g)->name))
  43 #define gadget_is_net2280(g)            (!strcmp("net2280", (g)->name))
  44 #define gadget_is_omap(g)               (!strcmp("omap_udc", (g)->name))
  45 #define gadget_is_pch(g)                (!strcmp("pch_udc", (g)->name))
  46 #define gadget_is_pxa(g)                (!strcmp("pxa25x_udc", (g)->name))
  47 #define gadget_is_pxa27x(g)             (!strcmp("pxa27x_udc", (g)->name))
  48 #define gadget_is_r8a66597(g)           (!strcmp("r8a66597_udc", (g)->name))
  49 #define gadget_is_renesas_usbhs(g)      (!strcmp("renesas_usbhs_udc", (g)->name))
  50 #define gadget_is_s3c2410(g)            (!strcmp("s3c2410_udc", (g)->name))
  51 #define gadget_is_s3c_hsotg(g)          (!strcmp("s3c-hsotg", (g)->name))
  52 #define gadget_is_s3c_hsudc(g)          (!strcmp("s3c-hsudc", (g)->name))
  53
  54 /**
  55  * usb_gadget_controller_number - support bcdDevice id convention
  56  * @gadget: the controller being driven
  57  *
  58  * Return a 2-digit BCD value associated with the peripheral controller,
  59  * suitable for use as part of a bcdDevice value, or a negative error code.
  60  *
  61  * NOTE:  this convention is purely optional, and has no meaning in terms of
  62  * any USB specification.  If you want to use a different convention in your
  63  * gadget driver firmware -- maybe a more formal revision ID -- feel free.
  64  *
  65  * Hosts see these bcdDevice numbers, and are allowed (but not encouraged!)
  66  * to change their behavior accordingly.  For example it might help avoiding
  67  * some chip bug.
  68  */
  69 static inline int usb_gadget_controller_number(struct usb_gadget *gadget)
  70 {
  71         if (gadget_is_net2280(gadget))
  72                 return 0x01;
  73         else if (gadget_is_dummy(gadget))
  74                 return 0x02;
  75         else if (gadget_is_pxa(gadget))
  76                 return 0x03;
  77         else if (gadget_is_goku(gadget))
  78                 return 0x06;
  79         else if (gadget_is_omap(gadget))
  80                 return 0x08;
  81         else if (gadget_is_pxa27x(gadget))
  82                 return 0x11;
  83         else if (gadget_is_s3c2410(gadget))
  84                 return 0x12;
  85         else if (gadget_is_at91(gadget))
  86                 return 0x13;
  87         else if (gadget_is_imx(gadget))
  88                 return 0x14;
  89         else if (gadget_is_musbhdrc(gadget))
  90                 return 0x16;
  91         else if (gadget_is_atmel_usba(gadget))
  92                 return 0x18;
  93         else if (gadget_is_fsl_usb2(gadget))
  94                 return 0x19;
  95         else if (gadget_is_amd5536udc(gadget))
  96                 return 0x20;
  97         else if (gadget_is_m66592(gadget))
  98                 return 0x21;
  99         else if (gadget_is_fsl_qe(gadget))
 100                 return 0x22;
 101         else if (gadget_is_ci13xxx_pci(gadget))
 102                 return 0x23;
 103         else if (gadget_is_langwell(gadget))
 104                 return 0x24;
 105         else if (gadget_is_r8a66597(gadget))
 106                 return 0x25;
 107         else if (gadget_is_s3c_hsotg(gadget))
 108                 return 0x26;
 109         else if (gadget_is_pch(gadget))
 110                 return 0x27;
 111         else if (gadget_is_ci13xxx_msm(gadget))
 112                 return 0x28;
 113         else if (gadget_is_renesas_usbhs(gadget))
 114                 return 0x29;
 115         else if (gadget_is_s3c_hsudc(gadget))
 116                 return 0x30;
 117         else if (gadget_is_net2272(gadget))
 118                 return 0x31;
 119         else if (gadget_is_dwc3(gadget))
 120                 return 0x32;
 121
 122         return -ENOENT;
 123 }
 124
 125
 126 /**
 127  * gadget_supports_altsettings - return true if altsettings work
 128  * @gadget: the gadget in question
 129  */
 130 static inline bool gadget_supports_altsettings(struct usb_gadget *gadget)
 131 {
 132         /* PXA 21x/25x/26x has no altsettings at all */
 133         if (gadget_is_pxa(gadget))
 134                 return false;
 135
 136         /* PXA 27x and 3xx have *broken* altsetting support */
 137         if (gadget_is_pxa27x(gadget))
 138                 return false;
 139
 140         /* Everything else is *presumably* fine ... */
 141         return true;
 142 }
 143
 144 #endif /* __GADGET_CHIPS_H */