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authorHans de Goede <hdegoede@redhat.com>2015-01-11 20:34:51 +0100
committerMarek Vasut <marex@denx.de>2015-01-18 12:31:36 +0100
commit90cdc1039d0bf6d85bb497dbb93d317ad234e846 (patch)
tree753472c23d0d45336216db7e9a6c06634c71f732 /common/usb.c
parente8672e3f0ec571d0ca7ccd8cbbeb113802c1d443 (diff)
musb-new: Fix reset sequence when in host mode
This commit fixes a number of issues with the reset sequence of musb-new in host mode: 1) Our usb device probe relies on a second device reset being done after the first descriptors read. Factor the musb reset code into a usb_reset_root_port function (and add this as an empty define for other controllers), and call this when a device has no parent. 2) Just like with normal usb controllers there needs to be a delay after reset, for normal usb controllers, this is handled in hub_port_reset, add a delay to usb_reset_root_port. 3) Sync the musb reset sequence with the upstream kernel, clear all bits of power except bits 4-7, and increase the time reset is asserted to 50 ms. With these fixes an usb keyboard I have now always enumerates properly, where as earlier it would only enumerare properly once every 5 tries. Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Diffstat (limited to 'common/usb.c')
-rw-r--r--common/usb.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/common/usb.c b/common/usb.c
index 1eda0998d2..32e15cd8dd 100644
--- a/common/usb.c
+++ b/common/usb.c
@@ -970,6 +970,8 @@ int usb_new_device(struct usb_device *dev)
printf("\n Couldn't reset port %i\n", dev->portnr);
return 1;
}
+ } else {
+ usb_reset_root_port();
}
#endif