src/southbridge/intel/lynxpoint/early_usb.c

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2
   3 #include <device/pci_ops.h>
   4 #include <device/pci_def.h>
   5 #include "pch.h"
   6
   7 /*
   8  * Setup USB controller MMIO BAR to prevent the
   9  * reference code from resetting the controller.
  10  *
  11  * The BAR will be re-assigned during device
  12  * enumeration so these are only temporary.
  13  */
  14 static void enable_usb_bar_on_device(pci_devfn_t dev, u32 bar)
  15 {
  16         pci_write_config32(dev, PCI_BASE_ADDRESS_0, bar);
  17         pci_or_config16(dev, PCI_COMMAND, PCI_COMMAND_MASTER | PCI_COMMAND_MEMORY);
  18 }
  19
  20 void enable_usb_bar(void)
  21 {
  22         enable_usb_bar_on_device(PCH_EHCI1_DEV, PCH_EHCI1_TEMP_BAR0);
  23         if (!pch_is_lp())
  24                 enable_usb_bar_on_device(PCH_EHCI2_DEV, PCH_EHCI2_TEMP_BAR0);
  25 }