target/linux/brcm47xx/patches-2.6.25/250-ohci-ssb-usb2.patch

   1 Index: linux-2.6.25/drivers/usb/host/ohci-ssb.c
   2 ===================================================================
   3 --- linux-2.6.25.orig/drivers/usb/host/ohci-ssb.c       2008-04-26 21:56:21.000000000 +0100
   4 +++ linux-2.6.25/drivers/usb/host/ohci-ssb.c    2008-04-26 22:07:53.000000000 +0100
   5 @@ -142,10 +142,59 @@ static int ssb_ohci_attach(struct ssb_de
   6         int err = -ENOMEM;
   7         u32 tmp, flags = 0;
   8
   9 -       if (dev->id.coreid == SSB_DEV_USB11_HOSTDEV)
  10 +       /*
  11 +        * THE FOLLOWING COMMENTS PRESERVED FROM GPL SOURCE RELEASE
  12 +        *
  13 +        * The USB core requires a special bit to be set during core
  14 +        * reset to enable host (OHCI) mode. Resetting the SB core in
  15 +        * pcibios_enable_device() is a hack for compatibility with
  16 +        * vanilla usb-ohci so that it does not have to know about
  17 +        * SB. A driver that wants to use the USB core in device mode
  18 +        * should know about SB and should reset the bit back to 0
  19 +        * after calling pcibios_enable_device().
  20 +        */
  21 +
  22 +       if (dev->id.coreid == SSB_DEV_USB11_HOSTDEV) {
  23                 flags |= SSB_OHCI_TMSLOW_HOSTMODE;
  24 +               ssb_device_enable(dev, flags);
  25 +       }
  26 +
  27 +       /*
  28 +        * USB 2.0 special considerations:
  29 +        *
  30 +        * 1. Since the core supports both OHCI and EHCI functions, it must
  31 +        *    only be reset once.
  32 +        *
  33 +        * 2. In addition to the standard SB reset sequence, the Host Control
  34 +        *    Register must be programmed to bring the USB core and various
  35 +        *    phy components out of reset.
  36 +        */
  37 +
  38 +       else if (dev->id.coreid == SSB_DEV_USB20_HOST) {
  39 +#warning FIX ME need test for core being up & exit
  40 +               ssb_device_enable(dev, 0);
  41 +               ssb_write32(dev, 0x200, 0x7ff);
  42 +               udelay(1);
  43 +               if (dev->id.revision == 1) { // bug in rev 1
  44 +
  45 +                       /* Change Flush control reg */
  46 +                       tmp = ssb_read32(dev, 0x400);
  47 +                       tmp &= ~8;
  48 +                       ssb_write32(dev, 0x400, tmp);
  49 +                       tmp = ssb_read32(dev, 0x400);
  50 +                       printk("USB20H fcr: 0x%0x\n", tmp);
  51 +
  52 +                       /* Change Shim control reg */
  53 +                       tmp = ssb_read32(dev, 0x304);
  54 +                       tmp &= ~0x100;
  55 +                       ssb_write32(dev, 0x304, tmp);
  56 +                       tmp = ssb_read32(dev, 0x304);
  57 +                       printk("USB20H shim: 0x%0x\n", tmp);
  58 +               }
  59 +       }
  60 +       else
  61 +               ssb_device_enable(dev, 0);
  62
  63 -       ssb_device_enable(dev, flags);
  64
  65         hcd = usb_create_hcd(&ssb_ohci_hc_driver, dev->dev,
  66                         dev->dev->bus_id);
  67 @@ -235,6 +284,7 @@ static int ssb_ohci_resume(struct ssb_de
  68  static const struct ssb_device_id ssb_ohci_table[] = {
  69         SSB_DEVICE(SSB_VENDOR_BROADCOM, SSB_DEV_USB11_HOSTDEV, SSB_ANY_REV),
  70         SSB_DEVICE(SSB_VENDOR_BROADCOM, SSB_DEV_USB11_HOST, SSB_ANY_REV),
  71 +       SSB_DEVICE(SSB_VENDOR_BROADCOM, SSB_DEV_USB20_HOST, SSB_ANY_REV),
  72         SSB_DEVTABLE_END
  73  };
  74  MODULE_DEVICE_TABLE(ssb, ssb_ohci_table);