usb_ehci.c

Go to the documentation of this file.

/* SPDX-License-Identifier: GPL-2.0-only */
 
#include <console/console.h>
#include <device/device.h>
#include <device/pci.h>
#include <device/pci_ids.h>
#include "pch.h"
#include <device/pci_ehci.h>
#include <device/mmio.h>
#include <device/pci_ops.h>
 
static void usb_ehci_init(struct device *dev)
{
        u32 reg32;
 
        /* Disable Wake on Disconnect in RMH */
        reg32 = RCBA32(RMHWKCTL);
        reg32 |= 0x22;
        RCBA32(RMHWKCTL) = reg32;
 
        printk(BIOS_DEBUG, "EHCI: Setting up controller.. ");
 
        /* For others, done in MRC.  */
#if CONFIG(USE_NATIVE_RAMINIT)
        pci_write_config32(dev, 0x84, 0x930c8811);
        pci_write_config32(dev, 0x88, 0x24000d30);
        pci_write_config32(dev, 0xf4, 0x80408588);
        pci_write_config32(dev, 0xf4, 0x80808588);
        pci_write_config32(dev, 0xf4, 0x00808588);
        pci_write_config32(dev, 0xfc, 0x205b1708);
#endif
 
        pci_or_config16(dev, PCI_COMMAND, PCI_COMMAND_MASTER);
        //pci_or_config16(dev, PCI_COMMAND, PCI_COMMAND_SERR);
 
        /* For others, done in MRC.  */
#if CONFIG(USE_NATIVE_RAMINIT)
        struct resource *res;
        u8 access_cntl;
 
        access_cntl = pci_read_config8(dev, 0x80);
 
        /* Enable writes to protected registers. */
        pci_write_config8(dev, 0x80, access_cntl | 1);
 
        res = probe_resource(dev, PCI_BASE_ADDRESS_0);
        if (res) {
                /* Number of ports and companion controllers.  */
                reg32 = read32((void *)(uintptr_t)(res->base + 4));
                write32((void *)(uintptr_t)(res->base + 4),
                        (reg32 & 0xfff00000) | 3);
        }
 
        /* Restore protection. */
        pci_write_config8(dev, 0x80, access_cntl);
#endif
 
        printk(BIOS_DEBUG, "done.\n");
}
 
static void usb_ehci_set_subsystem(struct device *dev, unsigned int vendor,
                                   unsigned int device)
{
        u8 access_cntl;
 
        access_cntl = pci_read_config8(dev, 0x80);
 
        /* Enable writes to protected registers. */
        pci_write_config8(dev, 0x80, access_cntl | 1);
 
        pci_dev_set_subsystem(dev, vendor, device);
 
        /* Restore protection. */
        pci_write_config8(dev, 0x80, access_cntl);
}
 
static const char *usb_ehci_acpi_name(const struct device *dev)
{
        switch (dev->path.pci.devfn) {
        case PCI_DEVFN(0x1a, 0):
                return "EHC2";
        case PCI_DEVFN(0x1d, 0):
                return "EHC1";
        }
        return NULL;
}
 
static struct pci_operations lops_pci = {
        .set_subsystem  = &usb_ehci_set_subsystem,
};
 
static struct device_operations usb_ehci_ops = {
        .read_resources         = pci_ehci_read_resources,
        .set_resources          = pci_dev_set_resources,
        .enable_resources       = pci_dev_enable_resources,
        .init                   = usb_ehci_init,
        .ops_pci                = &lops_pci,
        .acpi_name              = usb_ehci_acpi_name,
};
 
static const unsigned short pci_device_ids[] = { 0x1c26, 0x1c2d, 0x1e26, 0x1e2d,
                                                 0 };
 
static const struct pci_driver pch_usb_ehci __pci_driver = {
        .ops     = &usb_ehci_ops,
        .vendor  = PCI_VID_INTEL,
        .devices = pci_device_ids,
};