linux-vybrid_public/drivers/usb/gadget/gadget_chips.c

/*
 * USB device controllers have lots of quirks.  Use these macros in
 * gadget drivers or other code that needs to deal with them, and which
 * autoconfigures instead of using early binding to the hardware.
 *
 * This SHOULD eventually work like the ARM mach_is_*() stuff, driven by
 * some config file that gets updated as new hardware is supported.
 * (And avoiding all runtime comparisons in typical one-choice configs!)
 *
 * NOTE:  some of these controller drivers may not be available yet.
 * Some are available on 2.4 kernels; several are available, but not
 * yet pushed in the 2.6 mainline tree.
 */

#include <linux/usb/gadget.h>
#include <linux/module.h>

#include "gadget_chips.h"

/**
 * usb_gadget_controller_number - support bcdDevice id convention
 * @gadget: the controller being driven
 *
 * Return a 2-digit BCD value associated with the peripheral controller,
 * suitable for use as part of a bcdDevice value, or a negative error code.
 *
 * NOTE:  this convention is purely optional, and has no meaning in terms of
 * any USB specification.  If you want to use a different convention in your
 * gadget driver firmware -- maybe a more formal revision ID -- feel free.
 *
 * Hosts see these bcdDevice numbers, and are allowed (but not encouraged!)
 * to change their behavior accordingly.  For example it might help avoiding
 * some chip bug.
 */
int usb_gadget_controller_number(struct usb_gadget *gadget)
{
	if (gadget_is_net2280(gadget))
		return 0x01;
	else if (gadget_is_dummy(gadget))
		return 0x02;
	else if (gadget_is_pxa(gadget))
		return 0x03;
	else if (gadget_is_goku(gadget))
		return 0x06;
	else if (gadget_is_omap(gadget))
		return 0x08;
	else if (gadget_is_pxa27x(gadget))
		return 0x11;
	else if (gadget_is_s3c2410(gadget))
		return 0x12;
	else if (gadget_is_at91(gadget))
		return 0x13;
	else if (gadget_is_imx(gadget))
		return 0x14;
	else if (gadget_is_musbhdrc(gadget))
		return 0x16;
	else if (gadget_is_atmel_usba(gadget))
		return 0x18;
	else if (gadget_is_fsl_usb2(gadget))
		return 0x19;
	else if (gadget_is_amd5536udc(gadget))
		return 0x20;
	else if (gadget_is_m66592(gadget))
		return 0x21;
	else if (gadget_is_fsl_qe(gadget))
		return 0x22;
	else if (gadget_is_ci13xxx_pci(gadget))
		return 0x23;
	else if (gadget_is_langwell(gadget))
		return 0x24;
	else if (gadget_is_r8a66597(gadget))
		return 0x25;
	else if (gadget_is_s3c_hsotg(gadget))
		return 0x26;
	else if (gadget_is_pch(gadget))
		return 0x27;
	else if (gadget_is_ci13xxx_msm(gadget))
		return 0x28;
	else if (gadget_is_renesas_usbhs(gadget))
		return 0x29;
	else if (gadget_is_s3c_hsudc(gadget))
		return 0x30;
	else if (gadget_is_net2272(gadget))
		return 0x31;
	else if (gadget_is_dwc3(gadget))
		return 0x32;
	else if (gadget_is_lpc32xx(gadget))
		return 0x33;
	else if (gadget_is_bcm63xx(gadget))
		return 0x34;

	return -ENOENT;
}
EXPORT_SYMBOL_GPL(usb_gadget_controller_number);