USB: make EHCI initialize properly on PPC SOCs

Correctly initialize the on-chip EHCI controller on the AMCC PPC440EPx.
Fix "USB 0.0" initialization message, and properly put the controller
into a known state before starting it.

Add "FIXME" comment to the au1xxx bus glue which is doing the same wrong
thing here.  (Who maintains that, now that AMD sold off Alchemy?)  Remove
some false copyright attributions which were somehow placed in the au1xxx
bus glue then copied into ppc-soc.

Signed-off-by: Mike Nuss <mike@terascala.com>
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Cc: K.Boge <karsten.boge@amd.com>
Cc: Jordan Crouse <jordan.crouse@amd.com>
Signed-off-by: Stefan Roese <sr@denx.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

diff --git a/drivers/usb/host/ehci-au1xxx.c b/drivers/usb/host/ehci-au1xxx.c
index 5d1b12aad7766acc39d338c9200dfc4ca6b86601..b1d19268cb23df9688be260794ef475bddbe0340 100644 (file)
--- a/drivers/usb/host/ehci-au1xxx.c
+++ b/drivers/usb/host/ehci-au1xxx.c
@@ -1,8 +1,6 @@
 /*
  * EHCI HCD (Host Controller Driver) for USB.
  *
- * (C) Copyright 2000-2004 David Brownell <dbrownell@users.sourceforge.net>
- *
  * Bus Glue for AMD Alchemy Au1xxx
  *
  * Based on "ohci-au1xxx.c" by Matt Porter <mporter@kernel.crashing.org>
@@ -196,6 +194,9 @@ static const struct hc_driver ehci_au1xxx_hc_driver = {
 
        /*
         * basic lifecycle operations
+        *
+        * FIXME -- ehci_init() doesn't do enough here.
+        * See ehci-ppc-soc for a complete implementation.
         */
        .reset = ehci_init,
        .start = ehci_run,

diff --git a/drivers/usb/host/ehci-ppc-soc.c b/drivers/usb/host/ehci-ppc-soc.c
index c2cedb09ed8bf02699aff32c0010e8d81ab0d841..4f99b0eb27bc2bdaea9729897b46c44dae4c763b 100644 (file)
--- a/drivers/usb/host/ehci-ppc-soc.c
+++ b/drivers/usb/host/ehci-ppc-soc.c
@@ -6,7 +6,7 @@
  * Bus Glue for PPC On-Chip EHCI driver
  * Tested on AMCC 440EPx
  *
- * Based on "ehci-au12xx.c" by David Brownell <dbrownell@users.sourceforge.net>
+ * Based on "ehci-au1xxx.c" by K.Boge <karsten.boge@amd.com>
  *
  * This file is licenced under the GPL.
  */
@@ -15,6 +15,24 @@
 
 extern int usb_disabled(void);
 
+/* called during probe() after chip reset completes */
+static int ehci_ppc_soc_setup(struct usb_hcd *hcd)
+{
+       struct ehci_hcd *ehci = hcd_to_ehci(hcd);
+       int             retval;
+
+       retval = ehci_halt(ehci);
+       if (retval)
+               return retval;
+
+       retval = ehci_init(hcd);
+       if (retval)
+               return retval;
+
+       ehci->sbrn = 0x20;
+       return ehci_reset(ehci);
+}
+
 /**
  * usb_ehci_ppc_soc_probe - initialize PPC-SoC-based HCDs
  * Context: !in_interrupt()
@@ -120,7 +138,7 @@ static const struct hc_driver ehci_ppc_soc_hc_driver = {
        /*
         * basic lifecycle operations
         */
-       .reset = ehci_init,
+       .reset = ehci_ppc_soc_setup,
        .start = ehci_run,
        .stop = ehci_stop,
        .shutdown = ehci_shutdown,