Patrick Georgi (pgeorgi@google.com) just uploaded a new patch set to gerrit, which you can find at http://review.coreboot.org/9782
-gerrit
commit 19dd2d0f374ebb0354066613e412649d4b7ff197 Author: Duncan Laurie dlaurie@chromium.org Date: Thu Feb 19 16:21:10 2015 -0800
broadwell: Disable XHCI compliance mode entry
To avoid entries with Type-C alternate mode devices disable compliance mode entry. This needs to be set on both boot and resume.
BUG=chrome-os-partner:35320 BRANCH=samus TEST=manual: 1) boot on samus with USB keyboard plugged in -> controller in D0 at boot 2) iotools mmio_read32 0xe12080ec == 0x18010c01 3) suspend and resume 4) iotools mmio_read32 0xe12080ec == 0x18010c01 5) remove USB keyboard -> controller in D3 6) iotools mmio_read32 0xe12080ec == 0xffffffff 7) plug in USB keyboard -> controller in D0 8) iotools mmio_read32 0xe12080ec == 0x18010c01 9) boot with no external USB devices -> controller in D3 at boot 10) iotools mmio_read32 0xe12080ec == 0xffffffff 11) plug in USB keyboard -> controller in D0 12) iotools mmio_read32 0xe12080ec == 0x18010c01
Change-Id: I4d566112b3c188bafdf9a4bbd92944c89500e3e8 Signed-off-by: Patrick Georgi pgeorgi@chromium.org Original-Commit-Id: db8c8ab8ff25f6a39cd50dcc91b5ba9fd7d05059 Original-Change-Id: I8b68ba75e254a7e236c869f4470207eb5290053d Original-Signed-off-by: Duncan Laurie dlaurie@chromium.org Original-Reviewed-on: https://chromium-review.googlesource.com/251361 Original-Reviewed-by: Julius Werner jwerner@chromium.org --- src/soc/intel/broadwell/xhci.c | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+)
diff --git a/src/soc/intel/broadwell/xhci.c b/src/soc/intel/broadwell/xhci.c index 4c721c2..fde8bf7 100644 --- a/src/soc/intel/broadwell/xhci.c +++ b/src/soc/intel/broadwell/xhci.c @@ -192,11 +192,30 @@ void usb_xhci_sleep_prepare(device_t dev, u8 slp_typ) } #else /* !__SMM__ */
+static void xhci_init(struct device *dev) +{ + struct resource *res = find_resource(dev, PCI_BASE_ADDRESS_0); + u16 reg16; + u32 reg32; + + /* Ensure controller is in D0 state */ + reg16 = pci_read_config16(dev, XHCI_PWR_CTL_STS); + reg16 &= ~XHCI_PWR_CTL_SET_MASK; + reg16 |= XHCI_PWR_CTL_SET_D0; + pci_write_config16(dev, XHCI_PWR_CTL_STS, reg16); + + /* Disable Compliance Mode Entry */ + reg32 = read32(res2mmio(res, 0x80ec, 0)); + reg32 |= (1 << 0); + write32(res2mmio(res, 0x80ec, 0), reg32); +} + static struct device_operations usb_xhci_ops = { .read_resources = &pci_dev_read_resources, .set_resources = &pci_dev_set_resources, .enable_resources = &pci_dev_enable_resources, .ops_pci = &broadwell_pci_ops, + .init = &xhci_init, };
static const unsigned short pci_device_ids[] = {