tests/qtest/ds1338-test.c

   1 /*
   2  * QTest testcase for the DS1338 RTC
   3  *
   4  * Copyright (c) 2013 Jean-Christophe Dubois
   5  *
   6  *  This program is free software; you can redistribute it and/or modify it
   7  *  under the terms of the GNU General Public License as published by the
   8  *  Free Software Foundation; either version 2 of the License, or
   9  *  (at your option) any later version.
  10  *
  11  *  This program is distributed in the hope that it will be useful, but WITHOUT
  12  *  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13  *  FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
  14  *  for more details.
  15  *
  16  *  You should have received a copy of the GNU General Public License along
  17  *  with this program; if not, see <http://www.gnu.org/licenses/>.
  18  */
  19
  20 #include "qemu/osdep.h"
  21 #include "libqtest.h"
  22 #include "libqos/i2c.h"
  23
  24 #define DS1338_ADDR 0x68
  25
  26 static inline uint8_t bcd2bin(uint8_t x)
  27 {
  28     return ((x) & 0x0f) + ((x) >> 4) * 10;
  29 }
  30
  31 static void send_and_receive(void *obj, void *data, QGuestAllocator *alloc)
  32 {
  33     QI2CDevice *i2cdev = (QI2CDevice *)obj;
  34
  35     uint8_t resp[7];
  36     time_t now = time(NULL);
  37     struct tm *tm_ptr = gmtime(&now);
  38
  39     i2c_read_block(i2cdev, 0, resp, sizeof(resp));
  40
  41     /* check retrieved time against local time */
  42     g_assert_cmpuint(bcd2bin(resp[4]), == , tm_ptr->tm_mday);
  43     g_assert_cmpuint(bcd2bin(resp[5]), == , 1 + tm_ptr->tm_mon);
  44     g_assert_cmpuint(2000 + bcd2bin(resp[6]), == , 1900 + tm_ptr->tm_year);
  45 }
  46
  47 static void ds1338_register_nodes(void)
  48 {
  49     QOSGraphEdgeOptions opts = {
  50         .extra_device_opts = "address=0x68"
  51     };
  52     add_qi2c_address(&opts, &(QI2CAddress) { DS1338_ADDR });
  53
  54     qos_node_create_driver("ds1338", i2c_device_create);
  55     qos_node_consumes("ds1338", "i2c-bus", &opts);
  56     qos_add_test("tx-rx", "ds1338", send_and_receive, NULL);
  57 }
  58 libqos_init(ds1338_register_nodes);