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author | Linus Torvalds <torvalds@linux-foundation.org> | 2012-07-23 19:10:54 -0700 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2012-07-23 19:10:54 -0700 |
commit | f0a08fcb5972167e55faa330c4a24fbaa3328b1f (patch) | |
tree | e24c42230888bd0e6422b2f81d7991da4373bb5d /arch/tile/include/gxio/usb_host.h | |
parent | Merge tag 'please-pull-misc-3.6' of git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux (diff) | |
parent | tile: updates to pci root complex from community feedback (diff) | |
download | linux-dev-f0a08fcb5972167e55faa330c4a24fbaa3328b1f.tar.xz linux-dev-f0a08fcb5972167e55faa330c4a24fbaa3328b1f.zip |
Merge git://git.kernel.org/pub/scm/linux/kernel/git/cmetcalf/linux-tile
Pull arch/tile updates from Chris Metcalf:
"These changes provide support for PCIe root complex and USB host mode
for tilegx's on-chip I/Os.
In addition, this pull provides the required underpinning for the
on-chip networking support that was pulled into 3.5. The changes have
all been through LKML (with several rounds for PCIe RC) and on
linux-next."
* git://git.kernel.org/pub/scm/linux/kernel/git/cmetcalf/linux-tile:
tile: updates to pci root complex from community feedback
bounce: allow use of bounce pool via config option
usb: add host support for the tilegx architecture
arch/tile: provide kernel support for the tilegx USB shim
tile pci: enable IOMMU to support DMA for legacy devices
arch/tile: enable ZONE_DMA for tilegx
tilegx pci: support I/O to arbitrarily-cached pages
tile: remove unused header
arch/tile: tilegx PCI root complex support
arch/tile: provide kernel support for the tilegx TRIO shim
arch/tile: break out the "csum a long" function to <asm/checksum.h>
arch/tile: provide kernel support for the tilegx mPIPE shim
arch/tile: common DMA code for the GXIO IORPC subsystem
arch/tile: support MMIO-based readb/writeb etc.
arch/tile: introduce GXIO IORPC framework for tilegx
Diffstat (limited to 'arch/tile/include/gxio/usb_host.h')
-rw-r--r-- | arch/tile/include/gxio/usb_host.h | 87 |
1 files changed, 87 insertions, 0 deletions
diff --git a/arch/tile/include/gxio/usb_host.h b/arch/tile/include/gxio/usb_host.h new file mode 100644 index 000000000000..a60a126e4565 --- /dev/null +++ b/arch/tile/include/gxio/usb_host.h @@ -0,0 +1,87 @@ +/* + * Copyright 2012 Tilera Corporation. All Rights Reserved. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation, version 2. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or + * NON INFRINGEMENT. See the GNU General Public License for + * more details. + */ +#ifndef _GXIO_USB_H_ +#define _GXIO_USB_H_ + +#include "common.h" + +#include <hv/drv_usb_host_intf.h> +#include <hv/iorpc.h> + +/* + * + * An API for manipulating general-purpose I/O pins. + */ + +/* + * + * The USB shim allows access to the processor's Universal Serial Bus + * connections. + */ + +/* A context object used to manage USB hardware resources. */ +typedef struct { + + /* File descriptor for calling up to the hypervisor. */ + int fd; + + /* The VA at which our MMIO registers are mapped. */ + char *mmio_base; +} gxio_usb_host_context_t; + +/* Initialize a USB context. + * + * A properly initialized context must be obtained before any of the other + * gxio_usb_host routines may be used. + * + * @param context Pointer to a gxio_usb_host_context_t, which will be + * initialized by this routine, if it succeeds. + * @param usb_index Index of the USB shim to use. + * @param is_ehci Nonzero to use the EHCI interface; zero to use the OHCI + * intereface. + * @return Zero if the context was successfully initialized, else a + * GXIO_ERR_xxx error code. + */ +extern int gxio_usb_host_init(gxio_usb_host_context_t * context, int usb_index, + int is_ehci); + +/* Destroy a USB context. + * + * Once destroyed, a context may not be used with any gxio_usb_host routines + * other than gxio_usb_host_init(). After this routine returns, no further + * interrupts or signals requested on this context will be delivered. The + * state and configuration of the pins which had been attached to this + * context are unchanged by this operation. + * + * @param context Pointer to a gxio_usb_host_context_t. + * @return Zero if the context was successfully destroyed, else a + * GXIO_ERR_xxx error code. + */ +extern int gxio_usb_host_destroy(gxio_usb_host_context_t * context); + +/* Retrieve the address of the shim's MMIO registers. + * + * @param context Pointer to a properly initialized gxio_usb_host_context_t. + * @return The address of the shim's MMIO registers. + */ +extern void *gxio_usb_host_get_reg_start(gxio_usb_host_context_t * context); + +/* Retrieve the length of the shim's MMIO registers. + * + * @param context Pointer to a properly initialized gxio_usb_host_context_t. + * @return The length of the shim's MMIO registers. + */ +extern size_t gxio_usb_host_get_reg_len(gxio_usb_host_context_t * context); + +#endif /* _GXIO_USB_H_ */ |