linux/arch/tile/gxio/usb_host.c
<<
>>
Prefs
   1/*
   2 * Copyright 2012 Tilera Corporation. All Rights Reserved.
   3 *
   4 *   This program is free software; you can redistribute it and/or
   5 *   modify it under the terms of the GNU General Public License
   6 *   as published by the Free Software Foundation, version 2.
   7 *
   8 *   This program is distributed in the hope that it will be useful, but
   9 *   WITHOUT ANY WARRANTY; without even the implied warranty of
  10 *   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
  11 *   NON INFRINGEMENT.  See the GNU General Public License for
  12 *   more details.
  13 */
  14
  15/*
  16 *
  17 * Implementation of USB gxio calls.
  18 */
  19
  20#include <linux/io.h>
  21#include <linux/errno.h>
  22#include <linux/module.h>
  23
  24#include <gxio/iorpc_globals.h>
  25#include <gxio/iorpc_usb_host.h>
  26#include <gxio/kiorpc.h>
  27#include <gxio/usb_host.h>
  28
  29int gxio_usb_host_init(gxio_usb_host_context_t * context, int usb_index,
  30                       int is_ehci)
  31{
  32        char file[32];
  33        int fd;
  34
  35        if (is_ehci)
  36                snprintf(file, sizeof(file), "usb_host/%d/iorpc/ehci",
  37                         usb_index);
  38        else
  39                snprintf(file, sizeof(file), "usb_host/%d/iorpc/ohci",
  40                         usb_index);
  41
  42        fd = hv_dev_open((HV_VirtAddr) file, 0);
  43        if (fd < 0) {
  44                if (fd >= GXIO_ERR_MIN && fd <= GXIO_ERR_MAX)
  45                        return fd;
  46                else
  47                        return -ENODEV;
  48        }
  49
  50        context->fd = fd;
  51
  52        // Map in the MMIO space.
  53        context->mmio_base =
  54                (void __force *)iorpc_ioremap(fd, 0, HV_USB_HOST_MMIO_SIZE);
  55
  56        if (context->mmio_base == NULL) {
  57                hv_dev_close(context->fd);
  58                return -ENODEV;
  59        }
  60
  61        return 0;
  62}
  63
  64EXPORT_SYMBOL_GPL(gxio_usb_host_init);
  65
  66int gxio_usb_host_destroy(gxio_usb_host_context_t * context)
  67{
  68        iounmap((void __force __iomem *)(context->mmio_base));
  69        hv_dev_close(context->fd);
  70
  71        context->mmio_base = NULL;
  72        context->fd = -1;
  73
  74        return 0;
  75}
  76
  77EXPORT_SYMBOL_GPL(gxio_usb_host_destroy);
  78
  79void *gxio_usb_host_get_reg_start(gxio_usb_host_context_t * context)
  80{
  81        return context->mmio_base;
  82}
  83
  84EXPORT_SYMBOL_GPL(gxio_usb_host_get_reg_start);
  85
  86size_t gxio_usb_host_get_reg_len(gxio_usb_host_context_t * context)
  87{
  88        return HV_USB_HOST_MMIO_SIZE;
  89}
  90
  91EXPORT_SYMBOL_GPL(gxio_usb_host_get_reg_len);
  92