LXR linux/drivers/usb/gadget/gadget

   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 */
  69static 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 */
 130static 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 */
 145