[U-Boot] [PATCH 12/22] musb: Update usb-compat to work with struct usb_device without a parent ptr

Hans de Goede
2015-06-17T19:33:55Z

When building with CONFIG_DM_USB=y struct usb_device does not have a parent
pointer. This commit adds support to the musb code to deal with this.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
---
drivers/usb/musb-new/musb_host.c | 4 +++
drivers/usb/musb-new/musb_uboot.c | 2 +-
drivers/usb/musb-new/usb-compat.h | 70 +++++++++++++++++++++++++++++++++++++++
3 files changed, 75 insertions(+), 1 deletion(-)

diff --git a/drivers/usb/musb-new/musb_host.c b/drivers/usb/musb-new/musb_host.c
index 437309c..40b9c66 100644
--- a/drivers/usb/musb-new/musb_host.c
+++ b/drivers/usb/musb-new/musb_host.c
@@ -2067,7 +2067,11 @@ int musb_urb_enqueue(

/* precompute addressing for external hub/tt ports */
if (musb->is_multipoint) {
+#ifndef __UBOOT__
struct usb_device *parent = urb->dev->parent;
+#else
+ struct usb_device *parent = usb_dev_get_parent(urb->dev);
+#endif

#ifndef __UBOOT__
if (parent != hcd->self.root_hub) {
diff --git a/drivers/usb/musb-new/musb_uboot.c b/drivers/usb/musb-new/musb_uboot.c
index 70e87c9..a96e8d2 100644
--- a/drivers/usb/musb-new/musb_uboot.c
+++ b/drivers/usb/musb-new/musb_uboot.c
@@ -97,7 +97,7 @@ int submit_control_msg(struct usb_device *dev, unsigned long pipe,
buffer, len, setup, 0);

/* Fix speed for non hub-attached devices */
- if (!dev->parent)
+ if (!usb_dev_get_parent(dev))
dev->speed = host_speed;

return submit_urb(&hcd, &urb);
diff --git a/drivers/usb/musb-new/usb-compat.h b/drivers/usb/musb-new/usb-compat.h
index 50bad37..53fe4ff 100644
--- a/drivers/usb/musb-new/usb-compat.h
+++ b/drivers/usb/musb-new/usb-compat.h
@@ -1,6 +1,7 @@
#ifndef __USB_COMPAT_H__
#define __USB_COMPAT_H__

+#include <dm.h>
#include "usb.h"

struct usb_hcd {
@@ -66,6 +67,68 @@ static inline int usb_hcd_unmap_urb_for_dma(struct usb_hcd *hcd,
return 0;
}

+#ifdef CONFIG_DM_USB
+static inline u16 find_tt(struct usb_device *udev)
+{
+ struct udevice *parent;
+ struct usb_device *uparent, *ttdev;
+
+ /*
+ * When called from usb-uclass.c: usb_scan_device() udev->dev points
+ * to the parent udevice, not the actual udevice belonging to the
+ * udev as the device is not instantiated yet. So when searching
+ * for the first usb-2 parent start with udev->dev not
+ * udev->dev->parent .
+ */
+ ttdev = udev;
+ parent = udev->dev;
+ uparent = dev_get_parentdata(parent);
+
+ while (uparent->speed != USB_SPEED_HIGH) {
+ struct udevice *dev = parent;
+
+ if (device_get_uclass_id(dev->parent) != UCLASS_USB_HUB) {
+ printf("musb: Error cannot find high speed parent of usb-1 device\n");
+ return 0;
+ }
+
+ ttdev = dev_get_parentdata(dev);
+ parent = dev->parent;
+ uparent = dev_get_parentdata(parent);
+ }
+
+ return (uparent->devnum << 8) | (ttdev->portnr - 1);
+}
+
+static inline struct usb_device *usb_dev_get_parent(struct usb_device *udev)
+{
+ struct udevice *parent = udev->dev->parent;
+
+ /*
+ * When called from usb-uclass.c: usb_scan_device() udev->dev points
+ * to the parent udevice, not the actual udevice belonging to the
+ * udev as the device is not instantiated yet.
+ *
+ * If dev is an usb-bus, then we are called from usb_scan_device() for
+ * an usb-device plugged directly into the root port, return NULL.
+ */
+ if (device_get_uclass_id(udev->dev) == UCLASS_USB)
+ return NULL;
+
+ /*
+ * If these 2 are not the same we are being called from
+ * usb_scan_device() and udev itself is the parent.
+ */
+ if (dev_get_parentdata(udev->dev) != udev)
+ return udev;
+
+ /* We are being called normally, use the parent pointer */
+ if (device_get_uclass_id(parent) == UCLASS_USB_HUB)
+ return dev_get_parentdata(parent);
+
+ return NULL;
+}
+#else
static inline u16 find_tt(struct usb_device *dev)
{
u8 chid;
@@ -86,4 +149,11 @@ static inline u16 find_tt(struct usb_device *dev)

return (hub << 8) | chid;
}
+
+static inline struct usb_device *usb_dev_get_parent(struct usb_device *dev)
+{
+ return dev->parent;
+}
+#endif
+
#endif /* __USB_COMPAT_H__ */
--
2.4.3