dm: Add basic tests

Add some tests of driver model functionality. Coverage includes:

- basic init
- binding of drivers to devices using platform_data
- automatic probing of devices when referenced
- availability of platform data to devices
- lifecycle from bind to probe to remove to unbind
- renumbering within a uclass when devices are probed/removed
- calling driver-defined operations
- deactivation of drivers when removed
- memory leak across creation and destruction of drivers/uclasses
- uclass init/destroy methods
- automatic probe/remove of children/parents when needed

This function is enabled for sandbox, using CONFIG_DM_TEST.

Signed-off-by: Simon Glass <sjg@chromium.org>

1 files changed, 144 insertions, 0 deletions

diff --git a/test/dm/test-fdt.c b/test/dm/test-fdt.c
new file mode 100644
index 0000000..e1d982f
--- /dev/null
+++ b/test/dm/test-fdt.c
@@ -0,0 +1,144 @@
+/*
+ * Copyright (c) 2013 Google, Inc
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <common.h>
+#include <dm.h>
+#include <errno.h>
+#include <fdtdec.h>
+#include <malloc.h>
+#include <asm/io.h>
+#include <dm/test.h>
+#include <dm/root.h>
+#include <dm/ut.h>
+#include <dm/uclass-internal.h>
+#include <dm/util.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+static int testfdt_drv_ping(struct device *dev, int pingval, int *pingret)
+{
+	const struct dm_test_pdata *pdata = dev->platdata;
+	struct dm_test_priv *priv = dev_get_priv(dev);
+
+	*pingret = pingval + pdata->ping_add;
+	priv->ping_total += *pingret;
+
+	return 0;
+}
+
+static const struct test_ops test_ops = {
+	.ping = testfdt_drv_ping,
+};
+
+static int testfdt_ofdata_to_platdata(struct device *dev)
+{
+	struct dm_test_pdata *pdata = dev_get_platdata(dev);
+
+	pdata->ping_add = fdtdec_get_int(gd->fdt_blob, dev->of_offset,
+					"ping-add", -1);
+	pdata->base = fdtdec_get_addr(gd->fdt_blob, dev->of_offset, "reg");
+
+	return 0;
+}
+
+static int testfdt_drv_probe(struct device *dev)
+{
+	struct dm_test_priv *priv = dev_get_priv(dev);
+
+	priv->ping_total += DM_TEST_START_TOTAL;
+
+	return 0;
+}
+
+static const struct device_id testfdt_ids[] = {
+	{
+		.compatible = "denx,u-boot-fdt-test",
+		.data = DM_TEST_TYPE_FIRST },
+	{
+		.compatible = "google,another-fdt-test",
+		.data = DM_TEST_TYPE_SECOND },
+	{ }
+};
+
+U_BOOT_DRIVER(testfdt_drv) = {
+	.name	= "testfdt_drv",
+	.of_match	= testfdt_ids,
+	.id	= UCLASS_TEST_FDT,
+	.ofdata_to_platdata = testfdt_ofdata_to_platdata,
+	.probe	= testfdt_drv_probe,
+	.ops	= &test_ops,
+	.priv_auto_alloc_size = sizeof(struct dm_test_priv),
+	.platdata_auto_alloc_size = sizeof(struct dm_test_pdata),
+};
+
+/* From here is the testfdt uclass code */
+int testfdt_ping(struct device *dev, int pingval, int *pingret)
+{
+	const struct test_ops *ops = device_get_ops(dev);
+
+	if (!ops->ping)
+		return -ENOSYS;
+
+	return ops->ping(dev, pingval, pingret);
+}
+
+UCLASS_DRIVER(testfdt) = {
+	.name		= "testfdt",
+	.id		= UCLASS_TEST_FDT,
+};
+
+/* Test that FDT-based binding works correctly */
+static int dm_test_fdt(struct dm_test_state *dms)
+{
+	const int num_drivers = 3;
+	struct device *dev;
+	struct uclass *uc;
+	int ret;
+	int i;
+
+	ret = dm_scan_fdt(gd->fdt_blob);
+	ut_assert(!ret);
+
+	ret = uclass_get(UCLASS_TEST_FDT, &uc);
+	ut_assert(!ret);
+
+	/* These are num_drivers compatible root-level device tree nodes */
+	ut_asserteq(num_drivers, list_count_items(&uc->dev_head));
+
+	/* Each should have no platdata / priv */
+	for (i = 0; i < num_drivers; i++) {
+		ret = uclass_find_device(UCLASS_TEST_FDT, i, &dev);
+		ut_assert(!ret);
+		ut_assert(!dev_get_priv(dev));
+		ut_assert(!dev->platdata);
+	}
+
+	/*
+	 * Now check that the ping adds are what we expect. This is using the
+	 * ping-add property in each node.
+	 */
+	for (i = 0; i < num_drivers; i++) {
+		uint32_t base;
+
+		ret = uclass_get_device(UCLASS_TEST_FDT, i, &dev);
+		ut_assert(!ret);
+
+		/*
+		 * Get the 'reg' property, which tells us what the ping add
+		 * should be. We don't use the platdata because we want
+		 * to test the code that sets that up (testfdt_drv_probe()).
+		 */
+		base = fdtdec_get_addr(gd->fdt_blob, dev->of_offset, "reg");
+		debug("dev=%d, base=%d: %s\n", i, base,
+		      fdt_get_name(gd->fdt_blob, dev->of_offset, NULL));
+
+		ut_assert(!dm_check_operations(dms, dev, base,
+					       dev_get_priv(dev)));
+	}
+
+	return 0;
+}
+DM_TEST(dm_test_fdt, 0);