LXR linux/arch/tile/gxio/trio.c

   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 * Implementation of trio gxio calls.
  17 */
  18
  19#include <linux/errno.h>
  20#include <linux/io.h>
  21#include <linux/module.h>
  22
  23#include <gxio/trio.h>
  24#include <gxio/iorpc_globals.h>
  25#include <gxio/iorpc_trio.h>
  26#include <gxio/kiorpc.h>
  27
  28int gxio_trio_init(gxio_trio_context_t *context, unsigned int trio_index)
  29{
  30        char file[32];
  31        int fd;
  32
  33        snprintf(file, sizeof(file), "trio/%d/iorpc", trio_index);
  34        fd = hv_dev_open((HV_VirtAddr) file, 0);
  35        if (fd < 0) {
  36                context->fd = -1;
  37
  38                if (fd >= GXIO_ERR_MIN && fd <= GXIO_ERR_MAX)
  39                        return fd;
  40                else
  41                        return -ENODEV;
  42        }
  43
  44        context->fd = fd;
  45
  46        return 0;
  47}
  48
  49EXPORT_SYMBOL_GPL(gxio_trio_init);
  50