usb_ehci.c

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/* 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 "i82801gx.h"
#include <device/pci_ehci.h>
#include <device/mmio.h>
#include <device/pci_def.h>
#include <device/pci_ops.h>
 
static void usb_ehci_init(struct device *dev)
{
        struct resource *res;
        u8 *base;
        u32 reg32;
 
        printk(BIOS_DEBUG, "EHCI: Setting up controller.. ");
        pci_or_config16(dev, PCI_COMMAND, PCI_COMMAND_MASTER | PCI_COMMAND_SERR);
 
        pci_or_config32(dev, 0xdc, (1 << 31) | (1 << 27));
 
        pci_update_config32(dev, 0xfc, ~(3 << 2), (2 << 2) | (1 << 29) | (1 << 17));
 
        /* Clear any pending port changes */
        res = find_resource(dev, PCI_BASE_ADDRESS_0);
        base = res2mmio(res, 0, 0);
        reg32 = read32(base + 0x24) | (1 << 2);
        write32(base + 0x24, reg32);
 
        /* workaround */
        pci_or_config8(dev, 0x84, 1 << 4);
 
        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 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,
        .enable                 = i82801gx_enable,
        .ops_pci                = &lops_pci,
};
 
/* 82801GB/GR/GDH/GBM/GHM/GU (ICH7/ICH7R/ICH7DH/ICH7-M/ICH7-M DH/ICH7-U) */
static const struct pci_driver i82801gx_usb_ehci __pci_driver = {
        .ops    = &usb_ehci_ops,
        .vendor = PCI_VID_INTEL,
        .device = 0x27cc,
};