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path: root/target/linux/brcm47xx/patches-2.6.28/250-ohci-ssb-usb2.patch
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Diffstat (limited to 'target/linux/brcm47xx/patches-2.6.28/250-ohci-ssb-usb2.patch')
-rw-r--r--target/linux/brcm47xx/patches-2.6.28/250-ohci-ssb-usb2.patch73
1 files changed, 73 insertions, 0 deletions
diff --git a/target/linux/brcm47xx/patches-2.6.28/250-ohci-ssb-usb2.patch b/target/linux/brcm47xx/patches-2.6.28/250-ohci-ssb-usb2.patch
new file mode 100644
index 0000000..a3d0481
--- /dev/null
+++ b/target/linux/brcm47xx/patches-2.6.28/250-ohci-ssb-usb2.patch
@@ -0,0 +1,73 @@
+diff --git a/drivers/usb/host/ohci-ssb.c b/drivers/usb/host/ohci-ssb.c
+--- a/drivers/usb/host/ohci-ssb.c
++++ b/drivers/usb/host/ohci-ssb.c
+@@ -106,10 +106,59 @@ static int ssb_ohci_attach(struct ssb_device *dev)
+ int err = -ENOMEM;
+ u32 tmp, flags = 0;
+
+- if (dev->id.coreid == SSB_DEV_USB11_HOSTDEV)
++ /*
++ * THE FOLLOWING COMMENTS PRESERVED FROM GPL SOURCE RELEASE
++ *
++ * The USB core requires a special bit to be set during core
++ * reset to enable host (OHCI) mode. Resetting the SB core in
++ * pcibios_enable_device() is a hack for compatibility with
++ * vanilla usb-ohci so that it does not have to know about
++ * SB. A driver that wants to use the USB core in device mode
++ * should know about SB and should reset the bit back to 0
++ * after calling pcibios_enable_device().
++ */
++
++ if (dev->id.coreid == SSB_DEV_USB11_HOSTDEV) {
+ flags |= SSB_OHCI_TMSLOW_HOSTMODE;
++ ssb_device_enable(dev, flags);
++ }
++
++ /*
++ * USB 2.0 special considerations:
++ *
++ * 1. Since the core supports both OHCI and EHCI functions, it must
++ * only be reset once.
++ *
++ * 2. In addition to the standard SB reset sequence, the Host Control
++ * Register must be programmed to bring the USB core and various
++ * phy components out of reset.
++ */
++
++ else if (dev->id.coreid == SSB_DEV_USB20_HOST) {
++#warning FIX ME need test for core being up & exit
++ ssb_device_enable(dev, 0);
++ ssb_write32(dev, 0x200, 0x7ff);
++ 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);
++ }
++ }
++ else
++ ssb_device_enable(dev, 0);
+
+- ssb_device_enable(dev, flags);
+
+ hcd = usb_create_hcd(&ssb_ohci_hc_driver, dev->dev,
+ dev_name(dev->dev));
+@@ -200,6 +249,7 @@ static int ssb_ohci_resume(struct ssb_device *dev)
+ static const struct ssb_device_id ssb_ohci_table[] = {
+ SSB_DEVICE(SSB_VENDOR_BROADCOM, SSB_DEV_USB11_HOSTDEV, SSB_ANY_REV),
+ SSB_DEVICE(SSB_VENDOR_BROADCOM, SSB_DEV_USB11_HOST, SSB_ANY_REV),
++ SSB_DEVICE(SSB_VENDOR_BROADCOM, SSB_DEV_USB20_HOST, SSB_ANY_REV),
+ SSB_DEVTABLE_END
+ };
+ MODULE_DEVICE_TABLE(ssb, ssb_ohci_table);