diff options
Diffstat (limited to 'drivers/usb/gadget/gadget_chips.c')
-rw-r--r-- | drivers/usb/gadget/gadget_chips.c | 94 |
1 files changed, 94 insertions, 0 deletions
diff --git a/drivers/usb/gadget/gadget_chips.c b/drivers/usb/gadget/gadget_chips.c new file mode 100644 index 00000000000..6387d43d3f8 --- /dev/null +++ b/drivers/usb/gadget/gadget_chips.c @@ -0,0 +1,94 @@ +/* + * 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); |