From 90cdc1039d0bf6d85bb497dbb93d317ad234e846 Mon Sep 17 00:00:00 2001 From: Hans de Goede Date: Sun, 11 Jan 2015 20:34:51 +0100 Subject: 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 --- include/usb.h | 5 +++++ 1 file changed, 5 insertions(+) (limited to 'include/usb.h') diff --git a/include/usb.h b/include/usb.h index b921a7f856..a083591ba0 100644 --- a/include/usb.h +++ b/include/usb.h @@ -159,6 +159,11 @@ enum usb_init_type { int usb_lowlevel_init(int index, enum usb_init_type init, void **controller); int usb_lowlevel_stop(int index); +#ifdef CONFIG_MUSB_HOST +void usb_reset_root_port(void); +#else +#define usb_reset_root_port() +#endif int submit_bulk_msg(struct usb_device *dev, unsigned long pipe, void *buffer, int transfer_len); -- cgit v1.2.1