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USB: EHCI restart speedup 

It is not necessary to powerdown the ports on ehci_pci_reinit() when the
chip reset already did that.  Removing this saves 20ms during restart
after poweroff paths (which OLPC uses a lot).

To ensure driver startup then behaves consistently, force a reset during
driver startup.  (Not doing this was an accident of some previous changes
to the init sequence.)

Make the corresponding change in the PS3 support.  It's not clear what
ehci-fsl should do here; it has similar code to the PS3.

Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Cc: <rvinson@mvista.com>
Acked-by: Geoff Levand <geoffrey.levand@am.sony.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Marcelo Tosatti 2007-08-20 18:13:27 -07:00 committed by Greg Kroah-Hartman
parent 0eb0226c9d
commit af1c51fcb2
2 changed files with 2 additions and 5 deletions
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5
drivers/usb/host/ehci-pci.c
View File

@ -58,8 +58,6 @@ static int ehci_pci_reinit(struct ehci_hcd *ehci, struct pci_dev *pdev)
if (!retval)
ehci_dbg(ehci, "MWI active\n");
ehci_port_power(ehci, 0);
return 0;
}
@ -156,8 +154,7 @@ static int ehci_pci_setup(struct usb_hcd *hcd)
break;
}
if (ehci_is_TDI(ehci))
ehci_reset(ehci);
ehci_reset(ehci);
/* at least the Genesys GL880S needs fixup here */
temp = HCS_N_CC(ehci->hcs_params) * HCS_N_PCC(ehci->hcs_params);

2
drivers/usb/host/ehci-ps3.c
View File

@ -47,7 +47,7 @@ static int ps3_ehci_hc_reset(struct usb_hcd *hcd)
if (result)
return result;
ehci_port_power(ehci, 0);
ehci_reset(ehci);
return result;
}