LXR qemu/tests/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 IMX25_I2C_0_BASE 0x43F80000
  25
  26#define DS1338_ADDR 0x68
  27
  28static I2CAdapter *i2c;
  29static uint8_t addr;
  30
  31static inline uint8_t bcd2bin(uint8_t x)
  32{
  33    return ((x) & 0x0f) + ((x) >> 4) * 10;
  34}
  35
  36static void send_and_receive(void)
  37{
  38    uint8_t cmd[1];
  39    uint8_t resp[7];
  40    time_t now = time(NULL);
  41    struct tm *tm_ptr = gmtime(&now);
  42
  43    /* reset the index in the RTC memory */
  44    cmd[0] = 0;
  45    i2c_send(i2c, addr, cmd, 1);
  46
  47    /* retrieve the date */
  48    i2c_recv(i2c, addr, resp, 7);
  49
  50    /* check retrieved time againt local time */
  51    g_assert_cmpuint(bcd2bin(resp[4]), == , tm_ptr->tm_mday);
  52    g_assert_cmpuint(bcd2bin(resp[5]), == , 1 + tm_ptr->tm_mon);
  53    g_assert_cmpuint(2000 + bcd2bin(resp[6]), == , 1900 + tm_ptr->tm_year);
  54}
  55
  56int main(int argc, char **argv)
  57{
  58    QTestState *s = NULL;
  59    int ret;
  60
  61    g_test_init(&argc, &argv, NULL);
  62
  63    s = qtest_start("-display none -machine imx25-pdk");
  64    i2c = imx_i2c_create(s, IMX25_I2C_0_BASE);
  65    addr = DS1338_ADDR;
  66
  67    qtest_add_func("/ds1338/tx-rx", send_and_receive);
  68
  69    ret = g_test_run();
  70
  71    qtest_quit(s);
  72    g_free(i2c);
  73
  74    return ret;
  75}
  76