uspace/lib/drv/generic/remote_led_dev.c

   1 /*
   2  * Copyright (c) 2014 Martin Decky
   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 <io/pixel.h>
  38 #include <macros.h>
  39 #include <device/led_dev.h>
  40 #include <ops/led_dev.h>
  41 #include <ddf/driver.h>
  42
  43 static void remote_led_color_set(ddf_fun_t *, void *, ipc_call_t *);
  44
  45 /** Remote LED interface operations */
  46 static const remote_iface_func_ptr_t remote_led_dev_iface_ops[] = {
  47         [LED_DEV_COLOR_SET] = remote_led_color_set
  48 };
  49
  50 /** Remote LED interface structure
  51  *
  52  * Interface for processing requests from remote clients
  53  * addressed by the LED interface.
  54  *
  55  */
  56 const remote_iface_t remote_led_dev_iface = {
  57         .method_count = ARRAY_SIZE(remote_led_dev_iface_ops),
  58         .methods = remote_led_dev_iface_ops
  59 };
  60
  61 /** Process the color_set() request from the remote client
  62  *
  63  * @param fun The function to which the data are written
  64  * @param ops The local ops structure
  65  *
  66  */
  67 static void remote_led_color_set(ddf_fun_t *fun, void *ops, ipc_call_t *call)
  68 {
  69         led_dev_ops_t *led_dev_ops = (led_dev_ops_t *) ops;
  70         pixel_t color = DEV_IPC_GET_ARG1(*call);
  71
  72         if (!led_dev_ops->color_set) {
  73                 async_answer_0(call, ENOTSUP);
  74                 return;
  75         }
  76
  77         errno_t rc = (*led_dev_ops->color_set)(fun, color);
  78         async_answer_0(call, rc);
  79 }
  80
  81 /**
  82  * @}
  83  */