LXR qemu/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/qgraph.h"
  14#include "libqos/i2c.h"
  15#include "hw/misc/pca9552_regs.h"
  16
  17#define PCA9552_TEST_ID   "pca9552-test"
  18#define PCA9552_TEST_ADDR 0x60
  19
  20static void pca9552_init(QI2CDevice *i2cdev)
  21{
  22    /* Switch on LEDs 0 and 12 */
  23    i2c_set8(i2cdev, PCA9552_LS0, 0x54);
  24    i2c_set8(i2cdev, PCA9552_LS3, 0x54);
  25}
  26
  27static void receive_autoinc(void *obj, void *data, QGuestAllocator *alloc)
  28{
  29    QI2CDevice *i2cdev = (QI2CDevice *)obj;
  30    uint8_t resp;
  31    uint8_t reg = PCA9552_LS0 | PCA9552_AUTOINC;
  32
  33    pca9552_init(i2cdev);
  34
  35    i2c_send(i2cdev, &reg, 1);
  36
  37    /* PCA9552_LS0 */
  38    i2c_recv(i2cdev, &resp, 1);
  39    g_assert_cmphex(resp, ==, 0x54);
  40
  41    /* PCA9552_LS1 */
  42    i2c_recv(i2cdev, &resp, 1);
  43    g_assert_cmphex(resp, ==, 0x55);
  44
  45    /* PCA9552_LS2 */
  46    i2c_recv(i2cdev, &resp, 1);
  47    g_assert_cmphex(resp, ==, 0x55);
  48
  49    /* PCA9552_LS3 */
  50    i2c_recv(i2cdev, &resp, 1);
  51    g_assert_cmphex(resp, ==, 0x54);
  52}
  53
  54static void send_and_receive(void *obj, void *data, QGuestAllocator *alloc)
  55{
  56    QI2CDevice *i2cdev = (QI2CDevice *)obj;
  57    uint8_t value;
  58
  59    value = i2c_get8(i2cdev, PCA9552_LS0);
  60    g_assert_cmphex(value, ==, 0x55);
  61
  62    value = i2c_get8(i2cdev, PCA9552_INPUT0);
  63    g_assert_cmphex(value, ==, 0x0);
  64
  65    pca9552_init(i2cdev);
  66
  67    value = i2c_get8(i2cdev, PCA9552_LS0);
  68    g_assert_cmphex(value, ==, 0x54);
  69
  70    value = i2c_get8(i2cdev, PCA9552_INPUT0);
  71    g_assert_cmphex(value, ==, 0x01);
  72
  73    value = i2c_get8(i2cdev, PCA9552_LS3);
  74    g_assert_cmphex(value, ==, 0x54);
  75
  76    value = i2c_get8(i2cdev, PCA9552_INPUT1);
  77    g_assert_cmphex(value, ==, 0x10);
  78}
  79
  80static void pca9552_register_nodes(void)
  81{
  82    QOSGraphEdgeOptions opts = {
  83        .extra_device_opts = "address=0x60"
  84    };
  85    add_qi2c_address(&opts, &(QI2CAddress) { 0x60 });
  86
  87    qos_node_create_driver("pca9552", i2c_device_create);
  88    qos_node_consumes("pca9552", "i2c-bus", &opts);
  89
  90    qos_add_test("tx-rx", "pca9552", send_and_receive, NULL);
  91    qos_add_test("rx-autoinc", "pca9552", receive_autoinc, NULL);
  92}
  93libqos_init(pca9552_register_nodes);
  94