uspace/lib/drv/generic/remote_pio_window.c

   1 /*
   2  * Copyright (c) 2013 Jakub Jermar
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  *
   9  * - Redistributions of source code must retain the above copyright
  10  *   notice, this list of conditions and the following disclaimer.
  11  * - Redistributions in binary form must reproduce the above copyright
  12  *   notice, this list of conditions and the following disclaimer in the
  13  *   documentation and/or other materials provided with the distribution.
  14  * - The name of the author may not be used to endorse or promote products
  15  *   derived from this software without specific prior written permission.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  18  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  19  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  20  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  21  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  22  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  23  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  24  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  25  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  26  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  27  */
  28
  29 /** @addtogroup libdrv
  30  * @{
  31  */
  32 /** @file
  33  */
  34
  35 #include <async.h>
  36 #include <errno.h>
  37 #include <macros.h>
  38
  39 #include "ops/pio_window.h"
  40 #include "ddf/driver.h"
  41
  42 static void remote_pio_window_get(ddf_fun_t *, void *, ipc_call_t *);
  43
  44 static const remote_iface_func_ptr_t remote_pio_window_iface_ops [] = {
  45         [PIO_WINDOW_GET] = &remote_pio_window_get
  46 };
  47
  48 const remote_iface_t remote_pio_window_iface = {
  49         .method_count = ARRAY_SIZE(remote_pio_window_iface_ops),
  50         .methods = remote_pio_window_iface_ops
  51 };
  52
  53 static void remote_pio_window_get(ddf_fun_t *fun, void *ops,
  54     ipc_call_t *call)
  55 {
  56         pio_window_ops_t *pio_win_ops = (pio_window_ops_t *) ops;
  57
  58         if (!pio_win_ops->get_pio_window) {
  59                 async_answer_0(call, ENOTSUP);
  60                 return;
  61         }
  62
  63         pio_window_t *pio_window = pio_win_ops->get_pio_window(fun);
  64         if (!pio_window) {
  65                 async_answer_0(call, ENOENT);
  66                 return;
  67         }
  68
  69         async_answer_0(call, EOK);
  70
  71         ipc_call_t data;
  72         size_t len;
  73         if (!async_data_read_receive(&data, &len)) {
  74                 /* Protocol error - the recipient is not accepting data */
  75                 return;
  76         }
  77
  78         async_data_read_finalize(&data, pio_window, len);
  79 }
  80
  81 /**
  82  * @}
  83  */