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![Simon Glass](/assets/img/avatar_default.png)
Buses need to iterate through their children in some situations. Add a few functions to make this easy. Signed-off-by: Simon Glass <sjg@chromium.org> Acked-by: Jagannadha Sutradharudu Teki <jagannadh.teki@gmail.com>
274 lines
7.8 KiB
C
274 lines
7.8 KiB
C
/*
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* Copyright (c) 2014 Google, Inc
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*
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* SPDX-License-Identifier: GPL-2.0+
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*/
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#include <common.h>
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#include <dm.h>
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#include <dm/device-internal.h>
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#include <dm/root.h>
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#include <dm/test.h>
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#include <dm/ut.h>
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#include <dm/util.h>
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DECLARE_GLOBAL_DATA_PTR;
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enum {
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FLAG_CHILD_PROBED = 10,
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FLAG_CHILD_REMOVED = -7,
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};
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static struct dm_test_state *test_state;
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static int testbus_drv_probe(struct udevice *dev)
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{
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return dm_scan_fdt_node(dev, gd->fdt_blob, dev->of_offset, false);
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}
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static int testbus_child_pre_probe(struct udevice *dev)
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{
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struct dm_test_parent_data *parent_data = dev_get_parentdata(dev);
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parent_data->flag += FLAG_CHILD_PROBED;
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return 0;
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}
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static int testbus_child_post_remove(struct udevice *dev)
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{
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struct dm_test_parent_data *parent_data = dev_get_parentdata(dev);
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struct dm_test_state *dms = test_state;
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parent_data->flag += FLAG_CHILD_REMOVED;
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if (dms)
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dms->removed = dev;
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return 0;
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}
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static const struct udevice_id testbus_ids[] = {
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{
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.compatible = "denx,u-boot-test-bus",
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.data = DM_TEST_TYPE_FIRST },
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{ }
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};
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U_BOOT_DRIVER(testbus_drv) = {
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.name = "testbus_drv",
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.of_match = testbus_ids,
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.id = UCLASS_TEST_BUS,
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.probe = testbus_drv_probe,
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.priv_auto_alloc_size = sizeof(struct dm_test_priv),
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.platdata_auto_alloc_size = sizeof(struct dm_test_pdata),
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.per_child_auto_alloc_size = sizeof(struct dm_test_parent_data),
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.child_pre_probe = testbus_child_pre_probe,
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.child_post_remove = testbus_child_post_remove,
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};
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UCLASS_DRIVER(testbus) = {
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.name = "testbus",
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.id = UCLASS_TEST_BUS,
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};
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/* Test that we can probe for children */
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static int dm_test_bus_children(struct dm_test_state *dms)
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{
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int num_devices = 4;
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struct udevice *bus;
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struct uclass *uc;
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ut_assertok(uclass_get(UCLASS_TEST_FDT, &uc));
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ut_asserteq(num_devices, list_count_items(&uc->dev_head));
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/* Probe the bus, which should yield 3 more devices */
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ut_assertok(uclass_get_device(UCLASS_TEST_BUS, 0, &bus));
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num_devices += 3;
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ut_assertok(uclass_get(UCLASS_TEST_FDT, &uc));
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ut_asserteq(num_devices, list_count_items(&uc->dev_head));
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ut_assert(!dm_check_devices(dms, num_devices));
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return 0;
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}
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DM_TEST(dm_test_bus_children, DM_TESTF_SCAN_PDATA | DM_TESTF_SCAN_FDT);
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/* Test our functions for accessing children */
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static int dm_test_bus_children_funcs(struct dm_test_state *dms)
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{
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const void *blob = gd->fdt_blob;
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struct udevice *bus, *dev;
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int node;
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ut_assertok(uclass_get_device(UCLASS_TEST_BUS, 0, &bus));
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/* device_get_child() */
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ut_assertok(device_get_child(bus, 0, &dev));
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ut_asserteq(-ENODEV, device_get_child(bus, 4, &dev));
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ut_assertok(device_get_child_by_seq(bus, 5, &dev));
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ut_assert(dev->flags & DM_FLAG_ACTIVATED);
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ut_asserteq_str("c-test@5", dev->name);
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/* Device with sequence number 0 should be accessible */
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ut_asserteq(-ENODEV, device_find_child_by_seq(bus, -1, true, &dev));
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ut_assertok(device_find_child_by_seq(bus, 0, true, &dev));
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ut_assert(!(dev->flags & DM_FLAG_ACTIVATED));
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ut_asserteq(-ENODEV, device_find_child_by_seq(bus, 0, false, &dev));
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ut_assertok(device_get_child_by_seq(bus, 0, &dev));
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ut_assert(dev->flags & DM_FLAG_ACTIVATED);
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/* There is no device with sequence number 2 */
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ut_asserteq(-ENODEV, device_find_child_by_seq(bus, 2, false, &dev));
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ut_asserteq(-ENODEV, device_find_child_by_seq(bus, 2, true, &dev));
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ut_asserteq(-ENODEV, device_get_child_by_seq(bus, 2, &dev));
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/* Looking for something that is not a child */
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node = fdt_path_offset(blob, "/junk");
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ut_asserteq(-ENODEV, device_find_child_by_of_offset(bus, node, &dev));
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node = fdt_path_offset(blob, "/d-test");
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ut_asserteq(-ENODEV, device_find_child_by_of_offset(bus, node, &dev));
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/* Find a valid child */
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node = fdt_path_offset(blob, "/some-bus/c-test@1");
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ut_assertok(device_find_child_by_of_offset(bus, node, &dev));
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ut_assert(!(dev->flags & DM_FLAG_ACTIVATED));
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ut_assertok(device_get_child_by_of_offset(bus, node, &dev));
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ut_assert(dev->flags & DM_FLAG_ACTIVATED);
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return 0;
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}
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DM_TEST(dm_test_bus_children_funcs, DM_TESTF_SCAN_PDATA | DM_TESTF_SCAN_FDT);
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/* Test that we can iterate through children */
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static int dm_test_bus_children_iterators(struct dm_test_state *dms)
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{
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struct udevice *bus, *dev, *child;
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/* Walk through the children one by one */
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ut_assertok(uclass_get_device(UCLASS_TEST_BUS, 0, &bus));
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ut_assertok(device_find_first_child(bus, &dev));
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ut_asserteq_str("c-test@5", dev->name);
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ut_assertok(device_find_next_child(&dev));
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ut_asserteq_str("c-test@0", dev->name);
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ut_assertok(device_find_next_child(&dev));
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ut_asserteq_str("c-test@1", dev->name);
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ut_assertok(device_find_next_child(&dev));
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ut_asserteq_ptr(dev, NULL);
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/* Move to the next child without using device_find_first_child() */
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ut_assertok(device_find_child_by_seq(bus, 5, true, &dev));
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ut_asserteq_str("c-test@5", dev->name);
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ut_assertok(device_find_next_child(&dev));
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ut_asserteq_str("c-test@0", dev->name);
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/* Try a device with no children */
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ut_assertok(device_find_first_child(dev, &child));
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ut_asserteq_ptr(child, NULL);
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return 0;
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}
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DM_TEST(dm_test_bus_children_iterators,
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DM_TESTF_SCAN_PDATA | DM_TESTF_SCAN_FDT);
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/* Test that the bus can store data about each child */
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static int dm_test_bus_parent_data(struct dm_test_state *dms)
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{
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struct dm_test_parent_data *parent_data;
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struct udevice *bus, *dev;
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struct uclass *uc;
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int value;
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ut_assertok(uclass_get_device(UCLASS_TEST_BUS, 0, &bus));
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/* Check that parent data is allocated */
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ut_assertok(device_find_child_by_seq(bus, 0, true, &dev));
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ut_asserteq_ptr(NULL, dev_get_parentdata(dev));
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ut_assertok(device_get_child_by_seq(bus, 0, &dev));
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parent_data = dev_get_parentdata(dev);
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ut_assert(NULL != parent_data);
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/* Check that it starts at 0 and goes away when device is removed */
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parent_data->sum += 5;
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ut_asserteq(5, parent_data->sum);
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device_remove(dev);
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ut_asserteq_ptr(NULL, dev_get_parentdata(dev));
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/* Check that we can do this twice */
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ut_assertok(device_get_child_by_seq(bus, 0, &dev));
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parent_data = dev_get_parentdata(dev);
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ut_assert(NULL != parent_data);
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parent_data->sum += 5;
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ut_asserteq(5, parent_data->sum);
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/* Add parent data to all children */
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ut_assertok(uclass_get(UCLASS_TEST_FDT, &uc));
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value = 5;
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uclass_foreach_dev(dev, uc) {
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/* Ignore these if they are not on this bus */
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if (dev->parent != bus) {
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ut_asserteq_ptr(NULL, dev_get_parentdata(dev));
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continue;
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}
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ut_assertok(device_probe(dev));
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parent_data = dev_get_parentdata(dev);
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parent_data->sum = value;
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value += 5;
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}
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/* Check it is still there */
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value = 5;
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uclass_foreach_dev(dev, uc) {
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/* Ignore these if they are not on this bus */
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if (dev->parent != bus)
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continue;
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parent_data = dev_get_parentdata(dev);
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ut_asserteq(value, parent_data->sum);
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value += 5;
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}
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return 0;
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}
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DM_TEST(dm_test_bus_parent_data, DM_TESTF_SCAN_PDATA | DM_TESTF_SCAN_FDT);
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/* Test that the bus ops are called when a child is probed/removed */
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static int dm_test_bus_parent_ops(struct dm_test_state *dms)
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{
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struct dm_test_parent_data *parent_data;
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struct udevice *bus, *dev;
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struct uclass *uc;
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test_state = dms;
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ut_assertok(uclass_get_device(UCLASS_TEST_BUS, 0, &bus));
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ut_assertok(uclass_get(UCLASS_TEST_FDT, &uc));
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uclass_foreach_dev(dev, uc) {
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/* Ignore these if they are not on this bus */
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if (dev->parent != bus)
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continue;
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ut_asserteq_ptr(NULL, dev_get_parentdata(dev));
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ut_assertok(device_probe(dev));
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parent_data = dev_get_parentdata(dev);
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ut_asserteq(FLAG_CHILD_PROBED, parent_data->flag);
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}
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uclass_foreach_dev(dev, uc) {
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/* Ignore these if they are not on this bus */
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if (dev->parent != bus)
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continue;
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parent_data = dev_get_parentdata(dev);
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ut_asserteq(FLAG_CHILD_PROBED, parent_data->flag);
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ut_assertok(device_remove(dev));
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ut_asserteq_ptr(NULL, dev_get_parentdata(dev));
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ut_asserteq_ptr(dms->removed, dev);
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}
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test_state = NULL;
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return 0;
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}
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DM_TEST(dm_test_bus_parent_ops, DM_TESTF_SCAN_PDATA | DM_TESTF_SCAN_FDT);
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