src/southbridge/intel/i82801gx/usb_ehci.c

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2
   3 #include <console/console.h>
   4 #include <device/device.h>
   5 #include <device/pci.h>
   6 #include <device/pci_ids.h>
   7 #include "i82801gx.h"
   8 #include <device/pci_ehci.h>
   9 #include <device/mmio.h>
  10 #include <device/pci_ops.h>
  11
  12 static void usb_ehci_init(struct device *dev)
  13 {
  14         struct resource *res;
  15         u8 *base;
  16         u32 reg32;
  17
  18         printk(BIOS_DEBUG, "EHCI: Setting up controller.. ");
  19         pci_or_config16(dev, PCI_COMMAND, PCI_COMMAND_MASTER | PCI_COMMAND_SERR);
  20
  21         pci_or_config32(dev, 0xdc, (1 << 31) | (1 << 27));
  22
  23         pci_update_config32(dev, 0xfc, ~(3 << 2), (2 << 2) | (1 << 29) | (1 << 17));
  24
  25         /* Clear any pending port changes */
  26         res = find_resource(dev, PCI_BASE_ADDRESS_0);
  27         base = res2mmio(res, 0, 0);
  28         reg32 = read32(base + 0x24) | (1 << 2);
  29         write32(base + 0x24, reg32);
  30
  31         /* workaround */
  32         pci_or_config8(dev, 0x84, 1 << 4);
  33
  34         printk(BIOS_DEBUG, "done.\n");
  35 }
  36
  37 static void usb_ehci_set_subsystem(struct device *dev, unsigned int vendor, unsigned int device)
  38 {
  39         u8 access_cntl;
  40
  41         access_cntl = pci_read_config8(dev, 0x80);
  42
  43         /* Enable writes to protected registers. */
  44         pci_write_config8(dev, 0x80, access_cntl | 1);
  45
  46         pci_dev_set_subsystem(dev, vendor, device);
  47
  48         /* Restore protection. */
  49         pci_write_config8(dev, 0x80, access_cntl);
  50 }
  51
  52 static struct pci_operations lops_pci = {
  53         .set_subsystem  = &usb_ehci_set_subsystem,
  54 };
  55
  56 static struct device_operations usb_ehci_ops = {
  57         .read_resources         = pci_ehci_read_resources,
  58         .set_resources          = pci_dev_set_resources,
  59         .enable_resources       = pci_dev_enable_resources,
  60         .init                   = usb_ehci_init,
  61         .enable                 = i82801gx_enable,
  62         .ops_pci                = &lops_pci,
  63 };
  64
  65 /* 82801GB/GR/GDH/GBM/GHM/GU (ICH7/ICH7R/ICH7DH/ICH7-M/ICH7-M DH/ICH7-U) */
  66 static const struct pci_driver i82801gx_usb_ehci __pci_driver = {
  67         .ops    = &usb_ehci_ops,
  68         .vendor = PCI_VID_INTEL,
  69         .device = 0x27cc,
  70 };