usb_ehci.c

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/* SPDX-License-Identifier: GPL-2.0-only */
 
#include <device/device.h>
#include <device/pci.h>
#include <device/pci_ids.h>
#include <device/pci_ehci.h>
#include <device/pci_ops.h>
#include <soc/ehci.h>
#include <soc/pch.h>
 
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 void ehci_enable(struct device *dev)
{
        if (CONFIG(USBDEBUG))
                dev->enabled = 1;
        else
                pch_disable_devfn(dev);
}
 
static struct pci_operations ehci_ops_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,
        .ops_pci                = &ehci_ops_pci,
        .enable                 = ehci_enable,
};
 
static const unsigned short pci_device_ids[] = {
        0x9c26, /* LynxPoint-LP */
        0x9ca6, /* WildcatPoint */
        0
};
 
static const struct pci_driver pch_usb_ehci __pci_driver = {
        .ops     = &usb_ehci_ops,
        .vendor  = PCI_VID_INTEL,
        .devices = pci_device_ids,
};