Introduce Virtio-loopback epsilon release:

Epsilon release introduces a new compatibility layer which make virtio-loopback
design to work with QEMU and rust-vmm vhost-user backend without require any
changes.

Signed-off-by: Timos Ampelikiotis <t.ampelikiotis@virtualopensystems.com>
Change-Id: I52e57563e08a7d0bdc002f8e928ee61ba0c53dd9

1 files changed, 93 insertions, 0 deletions

diff --git a/tests/qtest/pca9552-test.c b/tests/qtest/pca9552-test.c
new file mode 100644
index 000000000..42a131266
--- /dev/null
+++ b/tests/qtest/pca9552-test.c
@@ -0,0 +1,93 @@
+/*
+ * QTest testcase for the PCA9552 LED blinker
+ *
+ * Copyright (c) 2017-2018, IBM Corporation.
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2 or later.
+ * See the COPYING file in the top-level directory.
+ */
+
+#include "qemu/osdep.h"
+
+#include "libqos/libqtest.h"
+#include "libqos/qgraph.h"
+#include "libqos/i2c.h"
+#include "hw/misc/pca9552_regs.h"
+
+#define PCA9552_TEST_ID   "pca9552-test"
+#define PCA9552_TEST_ADDR 0x60
+
+static void pca9552_init(QI2CDevice *i2cdev)
+{
+    /* Switch on LEDs 0 and 12 */
+    i2c_set8(i2cdev, PCA9552_LS0, 0x54);
+    i2c_set8(i2cdev, PCA9552_LS3, 0x54);
+}
+
+static void receive_autoinc(void *obj, void *data, QGuestAllocator *alloc)
+{
+    QI2CDevice *i2cdev = (QI2CDevice *)obj;
+    uint8_t resp;
+    uint8_t reg = PCA9552_LS0 | PCA9552_AUTOINC;
+
+    pca9552_init(i2cdev);
+
+    qi2c_send(i2cdev, &reg, 1);
+
+    /* PCA9552_LS0 */
+    qi2c_recv(i2cdev, &resp, 1);
+    g_assert_cmphex(resp, ==, 0x54);
+
+    /* PCA9552_LS1 */
+    qi2c_recv(i2cdev, &resp, 1);
+    g_assert_cmphex(resp, ==, 0x55);
+
+    /* PCA9552_LS2 */
+    qi2c_recv(i2cdev, &resp, 1);
+    g_assert_cmphex(resp, ==, 0x55);
+
+    /* PCA9552_LS3 */
+    qi2c_recv(i2cdev, &resp, 1);
+    g_assert_cmphex(resp, ==, 0x54);
+}
+
+static void send_and_receive(void *obj, void *data, QGuestAllocator *alloc)
+{
+    QI2CDevice *i2cdev = (QI2CDevice *)obj;
+    uint8_t value;
+
+    value = i2c_get8(i2cdev, PCA9552_LS0);
+    g_assert_cmphex(value, ==, 0x55);
+
+    value = i2c_get8(i2cdev, PCA9552_INPUT0);
+    g_assert_cmphex(value, ==, 0x0);
+
+    pca9552_init(i2cdev);
+
+    value = i2c_get8(i2cdev, PCA9552_LS0);
+    g_assert_cmphex(value, ==, 0x54);
+
+    value = i2c_get8(i2cdev, PCA9552_INPUT0);
+    g_assert_cmphex(value, ==, 0x01);
+
+    value = i2c_get8(i2cdev, PCA9552_LS3);
+    g_assert_cmphex(value, ==, 0x54);
+
+    value = i2c_get8(i2cdev, PCA9552_INPUT1);
+    g_assert_cmphex(value, ==, 0x10);
+}
+
+static void pca9552_register_nodes(void)
+{
+    QOSGraphEdgeOptions opts = {
+        .extra_device_opts = "address=0x60"
+    };
+    add_qi2c_address(&opts, &(QI2CAddress) { 0x60 });
+
+    qos_node_create_driver("pca9552", i2c_device_create);
+    qos_node_consumes("pca9552", "i2c-bus", &opts);
+
+    qos_add_test("tx-rx", "pca9552", send_and_receive, NULL);
+    qos_add_test("rx-autoinc", "pca9552", receive_autoinc, NULL);
+}
+libqos_init(pca9552_register_nodes);