bcm47xx: Apply bcm5354 USB fix

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@17531 3c298f89-4303-0410-b956-a3cf2f4a3e73

diff --git a/target/linux/brcm47xx/patches-2.6.28/275-usb2-bcm5354-init.patch b/target/linux/brcm47xx/patches-2.6.28/275-usb2-bcm5354-init.patch
new file mode 100644 (file)
index 0000000..a166329
--- /dev/null
+++ b/target/linux/brcm47xx/patches-2.6.28/275-usb2-bcm5354-init.patch
@@ -0,0 +1,63 @@
+This patch significantly improves the reliability of high speed 
+usb writes on the bcm5354. It implements a work around for version 2
+of the usb20 core that was cribbed from the GPL sources for the 
+Asus wl500gpv2 and verified against the wl520gu sources.
+
+Reference:
+GPL/WL-520gu-NewUI/src/linux/linux/arch/mips/brcm-boards/bcm947xx/pcibios.c
+GPL/WL-500gPV2-NewUI/src/linux/linux/arch/mips/brcm-boards/bcm947xx/pcibios.c
+
+Signed-off-by: Steve Brown <sbrown@cortland.com>
+
+---
+ drivers/usb/host/ohci-ssb.c |   37 +++++++++++++++++++++++--------------
+ 1 file changed, 23 insertions(+), 14 deletions(-)
+
+--- linux-2.6.28.10.orig/drivers/usb/host/ohci-ssb.c
++++ linux-2.6.28.10/drivers/usb/host/ohci-ssb.c
+@@ -141,22 +141,31 @@ static int ssb_ohci_attach(struct ssb_de
+                */
+               ssb_device_enable(dev, 0);
+               ssb_write32(dev, 0x200, 0x7ff);
++
++              /* Change Flush control reg */
++              tmp = ssb_read32(dev, 0x400);
++              tmp &= ~8;
++              ssb_write32(dev, 0x400, tmp);
++              tmp = ssb_read32(dev, 0x400);
++
++              /* Change Shim control reg */
++              tmp = ssb_read32(dev, 0x304);
++              tmp &= ~0x100;
++              ssb_write32(dev, 0x304, tmp);
++              tmp = ssb_read32(dev, 0x304);
++
+               udelay(1);
+-              if (dev->id.revision == 1) { // bug in rev 1
+ 
+-                      /* Change Flush control reg */
+-                      tmp = ssb_read32(dev, 0x400);
+-                      tmp &= ~8;
+-                      ssb_write32(dev, 0x400, tmp);
+-                      tmp = ssb_read32(dev, 0x400);
+-                      printk("USB20H fcr: 0x%0x\n", tmp);
+-
+-                      /* Change Shim control reg */
+-                      tmp = ssb_read32(dev, 0x304);
+-                      tmp &= ~0x100;
+-                      ssb_write32(dev, 0x304, tmp);
+-                      tmp = ssb_read32(dev, 0x304);
+-                      printk("USB20H shim: 0x%0x\n", tmp);
++              /* Work around for 5354 failures */
++              if ((dev->id.revision == 2) && (dev->bus->chip_id == 0x5354)) {
++                      /* Change syn01 reg */
++                      tmp = 0x00fe00fe;
++                      ssb_write32(dev, 0x894, tmp);
++
++                      /* Change syn03 reg */
++                      tmp = ssb_read32(dev, 0x89c);
++                      tmp |= 0x1;
++                      ssb_write32(dev, 0x89c, tmp);
+               }
+       } else
+               ssb_device_enable(dev, 0);