tests: Add tmp105 qtest test case

Exercise all four commands of the TMP105, testing for an issue in the
I2C TX path.

The test case uses the N800's OMAP I2C and is the first for ARM.

Signed-off-by: Andreas Färber <andreas.faerber@web.de>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>

1 files changed, 76 insertions, 0 deletions

diff --git a/tests/tmp105-test.c b/tests/tmp105-test.c
new file mode 100644
index 0000000000..a6ad213de8
--- /dev/null
+++ b/tests/tmp105-test.c
@@ -0,0 +1,76 @@
+/*
+ * QTest testcase for the TMP105 temperature sensor
+ *
+ * Copyright (c) 2012 Andreas Färber
+ *
+ * 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 "libqtest.h"
+#include "libi2c.h"
+#include "hw/tmp105_regs.h"
+
+#include <glib.h>
+
+#define OMAP2_I2C_1_BASE 0x48070000
+
+#define N8X0_ADDR 0x48
+
+static I2CAdapter *i2c;
+static uint8_t addr;
+
+static void send_and_receive(void)
+{
+    uint8_t cmd[3];
+    uint8_t resp[2];
+
+    cmd[0] = TMP105_REG_TEMPERATURE;
+    i2c_send(i2c, addr, cmd, 1);
+    i2c_recv(i2c, addr, resp, 2);
+    g_assert_cmpuint(((uint16_t)resp[0] << 8) | resp[1], ==, 0);
+
+    cmd[0] = TMP105_REG_CONFIG;
+    cmd[1] = 0x0; /* matches the reset value */
+    i2c_send(i2c, addr, cmd, 2);
+    i2c_recv(i2c, addr, resp, 1);
+    g_assert_cmphex(resp[0], ==, cmd[1]);
+
+    cmd[0] = TMP105_REG_T_LOW;
+    cmd[1] = 0x12;
+    cmd[2] = 0x34;
+    i2c_send(i2c, addr, cmd, 3);
+    i2c_recv(i2c, addr, resp, 2);
+    g_assert_cmphex(resp[0], ==, cmd[1]);
+    g_assert_cmphex(resp[1], ==, cmd[2]);
+
+    cmd[0] = TMP105_REG_T_HIGH;
+    cmd[1] = 0x42;
+    cmd[2] = 0x31;
+    i2c_send(i2c, addr, cmd, 3);
+    i2c_recv(i2c, addr, resp, 2);
+    g_assert_cmphex(resp[0], ==, cmd[1]);
+    g_assert_cmphex(resp[1], ==, cmd[2]);
+}
+
+int main(int argc, char **argv)
+{
+    QTestState *s = NULL;
+    int ret;
+
+    g_test_init(&argc, &argv, NULL);
+
+    s = qtest_start("-display none -machine n800");
+    i2c = omap_i2c_create(OMAP2_I2C_1_BASE);
+    addr = N8X0_ADDR;
+
+    qtest_add_func("/tmp105/tx-rx", send_and_receive);
+
+    ret = g_test_run();
+
+    if (s) {
+        qtest_quit(s);
+    }
+    g_free(i2c);
+
+    return ret;
+}