tests/pca9552-test.c

   1 /*
   2  * QTest testcase for the PCA9552 LED blinker
   3  *
   4  * Copyright (c) 2017-2018, IBM Corporation.
   5  *
   6  * This work is licensed under the terms of the GNU GPL, version 2 or later.
   7  * See the COPYING file in the top-level directory.
   8  */
   9
  10 #include "qemu/osdep.h"
  11
  12 #include "libqtest.h"
  13 #include "libqos/i2c.h"
  14 #include "hw/misc/pca9552_regs.h"
  15
  16 #define PCA9552_TEST_ID   "pca9552-test"
  17 #define PCA9552_TEST_ADDR 0x60
  18
  19 static I2CAdapter *i2c;
  20
  21 static uint8_t pca9552_get8(I2CAdapter *i2c, uint8_t addr, uint8_t reg)
  22 {
  23     uint8_t resp[1];
  24     i2c_send(i2c, addr, &reg, 1);
  25     i2c_recv(i2c, addr, resp, 1);
  26     return resp[0];
  27 }
  28
  29 static void pca9552_set8(I2CAdapter *i2c, uint8_t addr, uint8_t reg,
  30                          uint8_t value)
  31 {
  32     uint8_t cmd[2];
  33     uint8_t resp[1];
  34
  35     cmd[0] = reg;
  36     cmd[1] = value;
  37     i2c_send(i2c, addr, cmd, 2);
  38     i2c_recv(i2c, addr, resp, 1);
  39     g_assert_cmphex(resp[0], ==, cmd[1]);
  40 }
  41
  42 static void receive_autoinc(void)
  43 {
  44     uint8_t resp;
  45     uint8_t reg = PCA9552_LS0 | PCA9552_AUTOINC;
  46
  47     i2c_send(i2c, PCA9552_TEST_ADDR, &reg, 1);
  48
  49     /* PCA9552_LS0 */
  50     i2c_recv(i2c, PCA9552_TEST_ADDR, &resp, 1);
  51     g_assert_cmphex(resp, ==, 0x54);
  52
  53     /* PCA9552_LS1 */
  54     i2c_recv(i2c, PCA9552_TEST_ADDR, &resp, 1);
  55     g_assert_cmphex(resp, ==, 0x55);
  56
  57     /* PCA9552_LS2 */
  58     i2c_recv(i2c, PCA9552_TEST_ADDR, &resp, 1);
  59     g_assert_cmphex(resp, ==, 0x55);
  60
  61     /* PCA9552_LS3 */
  62     i2c_recv(i2c, PCA9552_TEST_ADDR, &resp, 1);
  63     g_assert_cmphex(resp, ==, 0x54);
  64 }
  65
  66 static void send_and_receive(void)
  67 {
  68     uint8_t value;
  69
  70     value = pca9552_get8(i2c, PCA9552_TEST_ADDR, PCA9552_LS0);
  71     g_assert_cmphex(value, ==, 0x55);
  72
  73     value = pca9552_get8(i2c, PCA9552_TEST_ADDR, PCA9552_INPUT0);
  74     g_assert_cmphex(value, ==, 0x0);
  75
  76     /* Switch on LED 0 */
  77     pca9552_set8(i2c, PCA9552_TEST_ADDR, PCA9552_LS0, 0x54);
  78     value = pca9552_get8(i2c, PCA9552_TEST_ADDR, PCA9552_LS0);
  79     g_assert_cmphex(value, ==, 0x54);
  80
  81     value = pca9552_get8(i2c, PCA9552_TEST_ADDR, PCA9552_INPUT0);
  82     g_assert_cmphex(value, ==, 0x01);
  83
  84     /* Switch on LED 12 */
  85     pca9552_set8(i2c, PCA9552_TEST_ADDR, PCA9552_LS3, 0x54);
  86     value = pca9552_get8(i2c, PCA9552_TEST_ADDR, PCA9552_LS3);
  87     g_assert_cmphex(value, ==, 0x54);
  88
  89     value = pca9552_get8(i2c, PCA9552_TEST_ADDR, PCA9552_INPUT1);
  90     g_assert_cmphex(value, ==, 0x10);
  91 }
  92
  93 int main(int argc, char **argv)
  94 {
  95     QTestState *s = NULL;
  96     int ret;
  97
  98     g_test_init(&argc, &argv, NULL);
  99
 100     s = qtest_start("-machine n800 "
 101                     "-device pca9552,bus=i2c-bus.0,id=" PCA9552_TEST_ID
 102                     ",address=0x60");
 103     i2c = omap_i2c_create(s, OMAP2_I2C_1_BASE);
 104
 105     qtest_add_func("/pca9552/tx-rx", send_and_receive);
 106     qtest_add_func("/pca9552/rx-autoinc", receive_autoinc);
 107
 108     ret = g_test_run();
 109
 110     if (s) {
 111         qtest_quit(s);
 112     }
 113     g_free(i2c);
 114
 115     return ret;
 116 }