android_kernel_samsung_msm8976/include/asm-arm/arch-pxa/udc.h
David Brownell b2bbb20b37 USB: pxa2xx_udc understands GPIO based VBUS sensing
This updates the PXA 25x UDC board-independent infrastructure for VBUS sensing
and the D+ pullup.  The original code evolved from rather bizarre support on
Intel's "Lubbock" reference hardware, so that on more sensible hardware it
doesn't work as well as it could/should.

The change is just to teach the UDC driver how to use built-in PXA GPIO pins
directly.  This reduces the amount of board-specfic object code needed, and
enables the use of a VBUS sensing IRQ on boards (like Gumstix) that have one.
With VBUS sensing, the UDC is unclocked until a host is actually connected.

Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2006-09-27 11:58:48 -07:00

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C

/*
* linux/include/asm-arm/arch-pxa/udc.h
*
* This supports machine-specific differences in how the PXA2xx
* USB Device Controller (UDC) is wired.
*
* It is set in linux/arch/arm/mach-pxa/<machine>.c and used in
* the probe routine of linux/drivers/usb/gadget/pxa2xx_udc.c
*/
struct pxa2xx_udc_mach_info {
int (*udc_is_connected)(void); /* do we see host? */
void (*udc_command)(int cmd);
#define PXA2XX_UDC_CMD_CONNECT 0 /* let host see us */
#define PXA2XX_UDC_CMD_DISCONNECT 1 /* so host won't see us */
/* Boards following the design guidelines in the developer's manual,
* with on-chip GPIOs not Lubbock's wierd hardware, can have a sane
* VBUS IRQ and omit the methods above. Store the GPIO number
* here; for GPIO 0, also mask in one of the pxa_gpio_mode() bits.
*/
u16 gpio_vbus; /* high == vbus present */
u16 gpio_pullup; /* high == pullup activated */
};
extern void pxa_set_udc_info(struct pxa2xx_udc_mach_info *info);