Merge branch 'master' of git://git.denx.de/u-boot-sunxi

[oweals/u-boot.git] / drivers / usb / host / usb-uclass.c

diff --git a/drivers/usb/host/usb-uclass.c b/drivers/usb/host/usb-uclass.c
index 0b8a501ce8851be7a0d0751c1f74fa7145ddf1d2..611ea97a724929903d3ba028b53a42f894c223be 100644 (file)
--- a/drivers/usb/host/usb-uclass.c
+++ b/drivers/usb/host/usb-uclass.c
@@ -1,10 +1,9 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
  * (C) Copyright 2015 Google, Inc
  * Written by Simon Glass <sjg@chromium.org>
  *
  * usb_match_device() modified from Linux kernel v4.0.
- *
- * SPDX-License-Identifier:    GPL-2.0+
  */
 
 #include <common.h>
@@ -16,8 +15,6 @@
 #include <dm/lists.h>
 #include <dm/uclass-internal.h>
 
-DECLARE_GLOBAL_DATA_PTR;
-
 extern bool usb_started; /* flag for the started/stopped USB status */
 static bool asynch_allowed;
 
@@ -150,9 +147,21 @@ int usb_update_hub_device(struct usb_device *udev)
        return ops->update_hub_device(bus, udev);
 }
 
+int usb_get_max_xfer_size(struct usb_device *udev, size_t *size)
+{
+       struct udevice *bus = udev->controller_dev;
+       struct dm_usb_ops *ops = usb_get_ops(bus);
+
+       if (!ops->get_max_xfer_size)
+               return -ENOSYS;
+
+       return ops->get_max_xfer_size(bus, size);
+}
+
 int usb_stop(void)
 {
        struct udevice *bus;
+       struct udevice *rh;
        struct uclass *uc;
        struct usb_uclass_priv *uc_priv;
        int err = 0, ret;
@@ -168,23 +177,20 @@ int usb_stop(void)
                ret = device_remove(bus, DM_REMOVE_NORMAL);
                if (ret && !err)
                        err = ret;
-       }
-#ifdef CONFIG_BLK
-       ret = blk_unbind_all(IF_TYPE_USB);
-       if (ret && !err)
-               err = ret;
-#endif
-#ifdef CONFIG_SANDBOX
-       struct udevice *dev;
 
-       /* Reset all enulation devices */
-       ret = uclass_get(UCLASS_USB_EMUL, &uc);
-       if (ret)
-               return ret;
+               /* Locate root hub device */
+               device_find_first_child(bus, &rh);
+               if (rh) {
+                       /*
+                        * All USB devices are children of root hub.
+                        * Unbinding root hub will unbind all of its children.
+                        */
+                       ret = device_unbind(rh);
+                       if (ret && !err)
+                               err = ret;
+               }
+       }
 
-       uclass_foreach_dev(dev, uc)
-               usb_emul_reset(dev);
-#endif
 #ifdef CONFIG_USB_STORAGE
        usb_stor_reset();
 #endif
@@ -251,6 +257,21 @@ int usb_init(void)
                /* init low_level USB */
                printf("USB%d:   ", count);
                count++;
+
+#ifdef CONFIG_SANDBOX
+               /*
+                * For Sandbox, we need scan the device tree each time when we
+                * start the USB stack, in order to re-create the emulated USB
+                * devices and bind drivers for them before we actually do the
+                * driver probe.
+                */
+               ret = dm_scan_fdt_dev(bus);
+               if (ret) {
+                       printf("Sandbox USB device scan failed (%d)\n", ret);
+                       continue;
+               }
+#endif
+
                ret = device_probe(bus);
                if (ret == -ENODEV) {   /* No such device. */
                        puts("Port not available.\n");