forked from luck/tmp_suning_uos_patched
d1cc1732cc
This change adds support for accessing the USB shim from within the kernel. Note that this change by itself does not allow the kernel to act as a host or as a device; it merely exposes the built-in on-chip hardware to the kernel. The <arch/usb_host.h> and <arch/usb_host_def.h> headers are empty at the moment because the kernel does not require any types or definitions specific to the tilegx USB shim; the generic USB core code is all we need. The headers are left in as stubs so that we don't need to modify the hypervisor header (drv_usb_host_intf.h) from upstream. Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>
92 lines
2.0 KiB
C
92 lines
2.0 KiB
C
/*
|
|
* 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.
|
|
*/
|
|
|
|
/*
|
|
*
|
|
* Implementation of USB gxio calls.
|
|
*/
|
|
|
|
#include <linux/io.h>
|
|
#include <linux/errno.h>
|
|
#include <linux/module.h>
|
|
|
|
#include <gxio/iorpc_globals.h>
|
|
#include <gxio/iorpc_usb_host.h>
|
|
#include <gxio/kiorpc.h>
|
|
#include <gxio/usb_host.h>
|
|
|
|
int gxio_usb_host_init(gxio_usb_host_context_t * context, int usb_index,
|
|
int is_ehci)
|
|
{
|
|
char file[32];
|
|
int fd;
|
|
|
|
if (is_ehci)
|
|
snprintf(file, sizeof(file), "usb_host/%d/iorpc/ehci",
|
|
usb_index);
|
|
else
|
|
snprintf(file, sizeof(file), "usb_host/%d/iorpc/ohci",
|
|
usb_index);
|
|
|
|
fd = hv_dev_open((HV_VirtAddr) file, 0);
|
|
if (fd < 0) {
|
|
if (fd >= GXIO_ERR_MIN && fd <= GXIO_ERR_MAX)
|
|
return fd;
|
|
else
|
|
return -ENODEV;
|
|
}
|
|
|
|
context->fd = fd;
|
|
|
|
// Map in the MMIO space.
|
|
context->mmio_base =
|
|
(void __force *)iorpc_ioremap(fd, 0, HV_USB_HOST_MMIO_SIZE);
|
|
|
|
if (context->mmio_base == NULL) {
|
|
hv_dev_close(context->fd);
|
|
return -ENODEV;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
EXPORT_SYMBOL_GPL(gxio_usb_host_init);
|
|
|
|
int gxio_usb_host_destroy(gxio_usb_host_context_t * context)
|
|
{
|
|
iounmap((void __force __iomem *)(context->mmio_base));
|
|
hv_dev_close(context->fd);
|
|
|
|
context->mmio_base = NULL;
|
|
context->fd = -1;
|
|
|
|
return 0;
|
|
}
|
|
|
|
EXPORT_SYMBOL_GPL(gxio_usb_host_destroy);
|
|
|
|
void *gxio_usb_host_get_reg_start(gxio_usb_host_context_t * context)
|
|
{
|
|
return context->mmio_base;
|
|
}
|
|
|
|
EXPORT_SYMBOL_GPL(gxio_usb_host_get_reg_start);
|
|
|
|
size_t gxio_usb_host_get_reg_len(gxio_usb_host_context_t * context)
|
|
{
|
|
return HV_USB_HOST_MMIO_SIZE;
|
|
}
|
|
|
|
EXPORT_SYMBOL_GPL(gxio_usb_host_get_reg_len);
|