88 lines
2.8 KiB
C
88 lines
2.8 KiB
C
/*
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* Copyright 2012 Tilera Corporation. All Rights Reserved.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation, version 2.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
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* NON INFRINGEMENT. See the GNU General Public License for
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* more details.
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*/
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#ifndef _GXIO_USB_H_
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#define _GXIO_USB_H_
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#include <gxio/common.h>
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#include <hv/drv_usb_host_intf.h>
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#include <hv/iorpc.h>
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/*
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*
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* An API for manipulating general-purpose I/O pins.
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*/
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/*
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*
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* The USB shim allows access to the processor's Universal Serial Bus
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* connections.
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*/
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/* A context object used to manage USB hardware resources. */
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typedef struct {
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/* File descriptor for calling up to the hypervisor. */
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int fd;
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/* The VA at which our MMIO registers are mapped. */
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char *mmio_base;
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} gxio_usb_host_context_t;
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/* Initialize a USB context.
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*
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* A properly initialized context must be obtained before any of the other
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* gxio_usb_host routines may be used.
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*
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* @param context Pointer to a gxio_usb_host_context_t, which will be
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* initialized by this routine, if it succeeds.
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* @param usb_index Index of the USB shim to use.
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* @param is_ehci Nonzero to use the EHCI interface; zero to use the OHCI
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* intereface.
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* @return Zero if the context was successfully initialized, else a
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* GXIO_ERR_xxx error code.
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*/
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extern int gxio_usb_host_init(gxio_usb_host_context_t *context, int usb_index,
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int is_ehci);
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/* Destroy a USB context.
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*
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* Once destroyed, a context may not be used with any gxio_usb_host routines
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* other than gxio_usb_host_init(). After this routine returns, no further
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* interrupts or signals requested on this context will be delivered. The
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* state and configuration of the pins which had been attached to this
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* context are unchanged by this operation.
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*
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* @param context Pointer to a gxio_usb_host_context_t.
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* @return Zero if the context was successfully destroyed, else a
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* GXIO_ERR_xxx error code.
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*/
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extern int gxio_usb_host_destroy(gxio_usb_host_context_t *context);
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/* Retrieve the address of the shim's MMIO registers.
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*
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* @param context Pointer to a properly initialized gxio_usb_host_context_t.
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* @return The address of the shim's MMIO registers.
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*/
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extern void *gxio_usb_host_get_reg_start(gxio_usb_host_context_t *context);
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/* Retrieve the length of the shim's MMIO registers.
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*
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* @param context Pointer to a properly initialized gxio_usb_host_context_t.
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* @return The length of the shim's MMIO registers.
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*/
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extern size_t gxio_usb_host_get_reg_len(gxio_usb_host_context_t *context);
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#endif /* _GXIO_USB_H_ */
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