uspace/lib/drv/generic/remote_clock_dev.c

   1 /*
   2  * Copyright (c) 2012 Maurizio Lombardi
   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 <time.h>
  38 #include <macros.h>
  39 #include <device/clock_dev.h>
  40
  41 #include <ops/clock_dev.h>
  42 #include <ddf/driver.h>
  43
  44 static void remote_clock_time_get(ddf_fun_t *, void *, ipc_call_t *);
  45 static void remote_clock_time_set(ddf_fun_t *, void *, ipc_call_t *);
  46
  47 /** Remote clock interface operations */
  48 static const remote_iface_func_ptr_t remote_clock_dev_iface_ops[] = {
  49         [CLOCK_DEV_TIME_GET] = remote_clock_time_get,
  50         [CLOCK_DEV_TIME_SET] = remote_clock_time_set,
  51 };
  52
  53 /** Remote clock interface structure
  54  *
  55  * Interface for processing requests from remote clients
  56  * addressed by the clock interface.
  57  */
  58 const remote_iface_t remote_clock_dev_iface = {
  59         .method_count = ARRAY_SIZE(remote_clock_dev_iface_ops),
  60         .methods = remote_clock_dev_iface_ops,
  61 };
  62
  63 /** Process the time_get() request from the remote client
  64  *
  65  * @param fun The function from which the time is read
  66  * @param ops The local ops structure
  67  *
  68  */
  69 static void remote_clock_time_get(ddf_fun_t *fun, void *ops, ipc_call_t *call)
  70 {
  71         clock_dev_ops_t *clock_dev_ops = (clock_dev_ops_t *) ops;
  72         struct tm t;
  73         errno_t rc;
  74
  75         ipc_call_t data;
  76         size_t len;
  77         if (!async_data_read_receive(&data, &len)) {
  78                 /* TODO: Handle protocol error */
  79                 async_answer_0(call, EINVAL);
  80                 return;
  81         }
  82
  83         if (!clock_dev_ops->time_get) {
  84                 /* The driver does not provide the time_get() functionality */
  85                 async_answer_0(&data, ENOTSUP);
  86                 async_answer_0(call, ENOTSUP);
  87                 return;
  88         }
  89
  90         rc = (*clock_dev_ops->time_get)(fun, &t);
  91
  92         if (rc != EOK) {
  93                 /* Some error occurred */
  94                 async_answer_0(&data, rc);
  95                 async_answer_0(call, rc);
  96                 return;
  97         }
  98
  99         /* The operation was successful */
 100         async_data_read_finalize(&data, &t, sizeof(struct tm));
 101         async_answer_0(call, rc);
 102 }
 103
 104 /** Process the time_set() request from the remote client
 105  *
 106  * @param fun The function to which the data are written
 107  * @param ops The local ops structure
 108  *
 109  */
 110 static void remote_clock_time_set(ddf_fun_t *fun, void *ops, ipc_call_t *call)
 111 {
 112         clock_dev_ops_t *clock_dev_ops = (clock_dev_ops_t *) ops;
 113         errno_t rc;
 114         struct tm t;
 115
 116         ipc_call_t data;
 117         size_t len;
 118
 119         if (!async_data_write_receive(&data, &len)) {
 120                 /* TODO: Handle protocol error */
 121                 async_answer_0(call, EINVAL);
 122                 return;
 123         }
 124
 125         if (!clock_dev_ops->time_set) {
 126                 /* The driver does not support the time_set() functionality */
 127                 async_answer_0(&data, ENOTSUP);
 128                 async_answer_0(call, ENOTSUP);
 129                 return;
 130         }
 131
 132         async_data_write_finalize(&data, &t, sizeof(struct tm));
 133
 134         rc = (*clock_dev_ops->time_set)(fun, &t);
 135
 136         async_answer_0(call, rc);
 137 }
 138
 139 /**
 140  * @}
 141  */