text: // SPDX-License-Identifier: GPL-2.0+
  /*
   * Copyright (C) 2015 Google, Inc
   */
  
  #include <common.h>
  #include <dm.h>
  #include <part.h>
  #include <usb.h>
  #include <asm/global_data.h>
  #include <asm/state.h>
  #include <dm/test.h>
  #include <test/test.h>
  #include <test/ut.h>
  
  DECLARE_GLOBAL_DATA_PTR;
  
  /* Test that block devices can be created */
  static int dm_test_blk_base(struct unit_test_state *uts)
  {
  	struct udevice *blk1, *blk3, *dev;
  
  	/* Create two, one the parent of the other */
  	ut_assertok(blk_create_device(gd->dm_root, "sandbox_host_blk", "test",
  				      IF_TYPE_HOST, 1, 512, 2, &blk1));
  	ut_assertok(blk_create_device(blk1, "sandbox_host_blk", "test",
  				      IF_TYPE_HOST, 3, 512, 2, &blk3));
  
  	/* Check we can find them */
  	ut_asserteq(-ENODEV, blk_get_device(IF_TYPE_HOST, 0, &dev));
  	ut_assertok(blk_get_device(IF_TYPE_HOST, 1, &dev));
  	ut_asserteq_ptr(blk1, dev);
  	ut_assertok(blk_get_device(IF_TYPE_HOST, 3, &dev));
  	ut_asserteq_ptr(blk3, dev);
  
  	/* Check we can iterate */
  	ut_assertok(blk_first_device(IF_TYPE_HOST, &dev));
  	ut_asserteq_ptr(blk1, dev);
  	ut_assertok(blk_next_device(&dev));
  	ut_asserteq_ptr(blk3, dev);
  
  	return 0;
  }
  DM_TEST(dm_test_blk_base, UT_TESTF_SCAN_PDATA | UT_TESTF_SCAN_FDT);
  
  static int count_blk_devices(void)
  {
  	struct udevice *blk;
  	struct uclass *uc;
  	int count = 0;
  	int ret;
  
  	ret = uclass_get(UCLASS_BLK, &uc);
  	if (ret)
  		return ret;
  
  	uclass_foreach_dev(blk, uc)
  		count++;
  
  	return count;
  }
  
  /* Test that block devices work correctly with USB */
  static int dm_test_blk_usb(struct unit_test_state *uts)
  {
  	struct udevice *usb_dev, *dev;
  	struct blk_desc *dev_desc;
  
  	/* Get a flash device */
  	state_set_skip_delays(true);
  	ut_assertok(usb_init());
  	ut_assertok(uclass_get_device(UCLASS_MASS_STORAGE, 0, &usb_dev));
  	ut_assertok(blk_get_device_by_str("usb", "0", &dev_desc));
  
  	/* The parent should be a block device */
  	ut_assertok(blk_get_device(IF_TYPE_USB, 0, &dev));
  	ut_asserteq_ptr(usb_dev, dev_get_parent(dev));
  
  	/* Check we have one block device for each mass storage device */
  	ut_asserteq(6, count_blk_devices());
  
  	/* Now go around again, making sure the old devices were unbound */
  	ut_assertok(usb_stop());
  	ut_assertok(usb_init());
  	ut_asserteq(6, count_blk_devices());
  	ut_assertok(usb_stop());
  
  	return 0;
  }
  DM_TEST(dm_test_blk_usb, UT_TESTF_SCAN_PDATA | UT_TESTF_SCAN_FDT);
  
  /* Test that we can find block devices without probing them */
  static int dm_test_blk_find(struct unit_test_state *uts)
  {
  	struct udevice *blk, *dev;
  
  	ut_assertok(blk_create_device(gd->dm_root, "sandbox_host_blk", "test",
  				      IF_TYPE_HOST, 1, 512, 2, &blk));
  	ut_asserteq(-ENODEV, blk_find_device(IF_TYPE_HOST, 0, &dev));
  	ut_assertok(blk_find_device(IF_TYPE_HOST, 1, &dev));
  	ut_asserteq_ptr(blk, dev);
  	ut_asserteq(false, device_active(dev));
  
  	/* Now activate it */
  	ut_assertok(blk_get_device(IF_TYPE_HOST, 1, &dev));
  	ut_asserteq_ptr(blk, dev);
  	ut_asserteq(true, device_active(dev));
  
  	return 0;
  }
  DM_TEST(dm_test_blk_find, UT_TESTF_SCAN_PDATA | UT_TESTF_SCAN_FDT);
  
  /* Test that block device numbering works as expected */
  static int dm_test_blk_devnum(struct unit_test_state *uts)
  {
  	struct udevice *dev, *mmc_dev, *parent;
  	int i;
  
  	/*
  	 * Probe the devices, with the first one being probed last. This is the
  	 * one with no alias / sequence numnber.
  	 */
  	ut_assertok(uclass_get_device(UCLASS_MMC, 1, &dev));
  	ut_assertok(uclass_get_device(UCLASS_MMC, 2, &dev));
  	ut_assertok(uclass_get_device(UCLASS_MMC, 0, &dev));
  	for (i = 0; i < 3; i++) {
  		struct blk_desc *desc;
  
  		/* Check that the bblock device is attached */
  		ut_assertok(uclass_get_device_by_seq(UCLASS_MMC, i, &mmc_dev));
  		ut_assertok(blk_find_device(IF_TYPE_MMC, i, &dev));
  		parent = dev_get_parent(dev);
  		ut_asserteq_ptr(parent, mmc_dev);
  		ut_asserteq(trailing_strtol(mmc_dev->name), i);
  
  		/*
  		 * Check that the block device devnum matches its parent's
  		 * sequence number
  		 */
  		desc = dev_get_uclass_plat(dev);
  		ut_asserteq(desc->devnum, i);
  	}
  
  	return 0;
  }
  DM_TEST(dm_test_blk_devnum, UT_TESTF_SCAN_PDATA | UT_TESTF_SCAN_FDT);
  
  /* Test that we can get a block from its parent */
  static int dm_test_blk_get_from_parent(struct unit_test_state *uts)
  {
  	struct udevice *dev, *blk;
  
  	ut_assertok(uclass_get_device(UCLASS_MMC, 0, &dev));
  	ut_assertok(blk_get_from_parent(dev, &blk));
  
  	ut_assertok(uclass_get_device(UCLASS_I2C, 0, &dev));
  	ut_asserteq(-ENOTBLK, blk_get_from_parent(dev, &blk));
  
  	ut_assertok(uclass_get_device(UCLASS_GPIO, 0, &dev));
  	ut_asserteq(-ENODEV, blk_get_from_parent(dev, &blk));
  
  	return 0;
  }
  DM_TEST(dm_test_blk_get_from_parent, UT_TESTF_SCAN_PDATA | UT_TESTF_SCAN_FDT);
  