dm: usb: Add tests for the USB uclass

This adds a simple test for probing and a functional test using the flash
stick emulator, which tests a large chunk of the USB stack.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Marek Vasut <marex@denx.de>

4 files changed, 95 insertions, 0 deletions

diff --git a/test/dm/Makefile b/test/dm/Makefile
index a2e2d2328e..fd9e29f201 100644
--- a/test/dm/Makefile
+++ b/test/dm/Makefile
@@ -23,4 +23,5 @@ obj-$(CONFIG_DM_I2C) += i2c.o
 obj-$(CONFIG_DM_PCI) += pci.o
 obj-$(CONFIG_DM_SPI_FLASH) += sf.o
 obj-$(CONFIG_DM_SPI) += spi.o
+obj-$(CONFIG_DM_USB) += usb.o
 endif
diff --git a/test/dm/test-dm.sh b/test/dm/test-dm.sh
index 8ebc39297c..6158f6833f 100755
--- a/test/dm/test-dm.sh
+++ b/test/dm/test-dm.sh
@@ -10,5 +10,8 @@ dtc -I dts -O dtb test/dm/test.dts -o test/dm/test.dtb
 make O=sandbox sandbox_config || die "Cannot configure U-Boot"
 make O=sandbox -s -j${NUM_CPUS} || die "Cannot build U-Boot"
 dd if=/dev/zero of=spi.bin bs=1M count=2
+echo -n "this is a test" > testflash.bin
+dd if=/dev/zero bs=1M count=4 >>testflash.bin
 ./sandbox/u-boot -d test/dm/test.dtb -c "dm test"
 rm spi.bin
+rm testflash.bin
diff --git a/test/dm/test.dts b/test/dm/test.dts
index 0ab0916858..d0c40be6b0 100644
--- a/test/dm/test.dts
+++ b/test/dm/test.dts
@@ -20,6 +20,9 @@
 		testfdt8 = "/a-test";
 		eth0 = "/eth@10002000";
 		eth5 = &eth_5;
+		usb0 = &usb_0;
+		usb1 = &usb_1;
+		usb2 = &usb_2;
 	};
 
 	uart0: serial {
@@ -186,4 +189,42 @@
 		fake-host-hwaddr = <0x00 0x00 0x66 0x44 0x22 0x22>;
 	};
 
+	usb_0: usb@0 {
+		compatible = "sandbox,usb";
+		status = "disabled";
+		hub {
+			compatible = "sandbox,usb-hub";
+			#address-cells = <1>;
+			#size-cells = <0>;
+			flash-stick {
+				reg = <0>;
+				compatible = "sandbox,usb-flash";
+			};
+		};
+	};
+
+	usb_1: usb@1 {
+		compatible = "sandbox,usb";
+		hub {
+			compatible = "usb-hub";
+			usb,device-class = <9>;
+			hub-emul {
+				compatible = "sandbox,usb-hub";
+				#address-cells = <1>;
+				#size-cells = <0>;
+				flash-stick {
+					reg = <0>;
+					compatible = "sandbox,usb-flash";
+					sandbox,filepath = "testflash.bin";
+				};
+
+			};
+		};
+	};
+
+	usb_2: usb@2 {
+		compatible = "sandbox,usb";
+		status = "disabled";
+	};
+
 };
diff --git a/test/dm/usb.c b/test/dm/usb.c
new file mode 100644
index 0000000000..6ea86d7247
--- /dev/null
+++ b/test/dm/usb.c
@@ -0,0 +1,50 @@
+/*
+ * Copyright (C) 2015 Google, Inc
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <common.h>
+#include <dm.h>
+#include <usb.h>
+#include <asm/io.h>
+#include <dm/test.h>
+#include <dm/ut.h>
+
+/* Test that sandbox USB works correctly */
+static int dm_test_usb_base(struct dm_test_state *dms)
+{
+	struct udevice *bus;
+
+	ut_asserteq(-ENODEV, uclass_get_device_by_seq(UCLASS_USB, 0, &bus));
+	ut_assertok(uclass_get_device(UCLASS_USB, 0, &bus));
+	ut_asserteq(-ENODEV, uclass_get_device_by_seq(UCLASS_USB, 2, &bus));
+
+	return 0;
+}
+DM_TEST(dm_test_usb_base, DM_TESTF_SCAN_PDATA | DM_TESTF_SCAN_FDT);
+
+/*
+ * Test that we can use the flash stick. This is more of a functional test. It
+ * covers scanning the bug, setting up a hub and a flash stick and reading
+ * data from the flash stick.
+ */
+static int dm_test_usb_flash(struct dm_test_state *dms)
+{
+	struct udevice *dev;
+	block_dev_desc_t *dev_desc;
+	char cmp[1024];
+
+	ut_assertok(usb_init());
+	ut_assertok(uclass_get_device(UCLASS_MASS_STORAGE, 0, &dev));
+	ut_assertok(get_device("usb", "0", &dev_desc));
+
+	/* Read a few blocks and look for the string we expect */
+	ut_asserteq(512, dev_desc->blksz);
+	memset(cmp, '\0', sizeof(cmp));
+	ut_asserteq(2, dev_desc->block_read(dev_desc->dev, 0, 2, cmp));
+	ut_assertok(strcmp(cmp, "this is a test"));
+
+	return 0;
+}
+DM_TEST(dm_test_usb_flash, DM_TESTF_SCAN_PDATA | DM_TESTF_SCAN_FDT);