misc: add pca9552 LED blinker model

Specs are available here :

    https://www.nxp.com/docs/en/application-note/AN264.pdf

This is a simple model supporting the basic registers for led and GPIO
mode. The device also supports two blinking rates but not the model
yet.

Signed-off-by: Cédric Le Goater <clg@kaod.org>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Message-id: 20180530064049.27976-7-clg@kaod.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

1 files changed, 116 insertions, 0 deletions

diff --git a/tests/pca9552-test.c b/tests/pca9552-test.c
new file mode 100644
index 0000000000..5466a67ed7
--- /dev/null
+++ b/tests/pca9552-test.c
@@ -0,0 +1,116 @@
+/*
+ * 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 "libqtest.h"
+#include "libqos/i2c.h"
+#include "hw/misc/pca9552_regs.h"
+
+#define PCA9552_TEST_ID   "pca9552-test"
+#define PCA9552_TEST_ADDR 0x60
+
+static I2CAdapter *i2c;
+
+static uint8_t pca9552_get8(I2CAdapter *i2c, uint8_t addr, uint8_t reg)
+{
+    uint8_t resp[1];
+    i2c_send(i2c, addr, &reg, 1);
+    i2c_recv(i2c, addr, resp, 1);
+    return resp[0];
+}
+
+static void pca9552_set8(I2CAdapter *i2c, uint8_t addr, uint8_t reg,
+                         uint8_t value)
+{
+    uint8_t cmd[2];
+    uint8_t resp[1];
+
+    cmd[0] = reg;
+    cmd[1] = value;
+    i2c_send(i2c, addr, cmd, 2);
+    i2c_recv(i2c, addr, resp, 1);
+    g_assert_cmphex(resp[0], ==, cmd[1]);
+}
+
+static void receive_autoinc(void)
+{
+    uint8_t resp;
+    uint8_t reg = PCA9552_LS0 | PCA9552_AUTOINC;
+
+    i2c_send(i2c, PCA9552_TEST_ADDR, &reg, 1);
+
+    /* PCA9552_LS0 */
+    i2c_recv(i2c, PCA9552_TEST_ADDR, &resp, 1);
+    g_assert_cmphex(resp, ==, 0x54);
+
+    /* PCA9552_LS1 */
+    i2c_recv(i2c, PCA9552_TEST_ADDR, &resp, 1);
+    g_assert_cmphex(resp, ==, 0x55);
+
+    /* PCA9552_LS2 */
+    i2c_recv(i2c, PCA9552_TEST_ADDR, &resp, 1);
+    g_assert_cmphex(resp, ==, 0x55);
+
+    /* PCA9552_LS3 */
+    i2c_recv(i2c, PCA9552_TEST_ADDR, &resp, 1);
+    g_assert_cmphex(resp, ==, 0x54);
+}
+
+static void send_and_receive(void)
+{
+    uint8_t value;
+
+    value = pca9552_get8(i2c, PCA9552_TEST_ADDR, PCA9552_LS0);
+    g_assert_cmphex(value, ==, 0x55);
+
+    value = pca9552_get8(i2c, PCA9552_TEST_ADDR, PCA9552_INPUT0);
+    g_assert_cmphex(value, ==, 0x0);
+
+    /* Switch on LED 0 */
+    pca9552_set8(i2c, PCA9552_TEST_ADDR, PCA9552_LS0, 0x54);
+    value = pca9552_get8(i2c, PCA9552_TEST_ADDR, PCA9552_LS0);
+    g_assert_cmphex(value, ==, 0x54);
+
+    value = pca9552_get8(i2c, PCA9552_TEST_ADDR, PCA9552_INPUT0);
+    g_assert_cmphex(value, ==, 0x01);
+
+    /* Switch on LED 12 */
+    pca9552_set8(i2c, PCA9552_TEST_ADDR, PCA9552_LS3, 0x54);
+    value = pca9552_get8(i2c, PCA9552_TEST_ADDR, PCA9552_LS3);
+    g_assert_cmphex(value, ==, 0x54);
+
+    value = pca9552_get8(i2c, PCA9552_TEST_ADDR, PCA9552_INPUT1);
+    g_assert_cmphex(value, ==, 0x10);
+}
+
+int main(int argc, char **argv)
+{
+    QTestState *s = NULL;
+    int ret;
+
+    g_test_init(&argc, &argv, NULL);
+
+    s = qtest_start("-machine n800 "
+                    "-device pca9552,bus=i2c-bus.0,id=" PCA9552_TEST_ID
+                    ",address=0x60");
+    i2c = omap_i2c_create(s, OMAP2_I2C_1_BASE);
+
+    qtest_add_func("/pca9552/tx-rx", send_and_receive);
+    qtest_add_func("/pca9552/rx-autoinc", receive_autoinc);
+
+    ret = g_test_run();
+
+    if (s) {
+        qtest_quit(s);
+    }
+    g_free(i2c);
+
+    return ret;
+}