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// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (c) 2015, Google, Inc
* Written by Simon Glass <sjg@chromium.org>
* All rights reserved.
*/
#include <common.h>
#include <dm.h>
#include <dm/device_compat.h>
#include <init.h>
#include <log.h>
#include <pci.h>
#include <reset.h>
#include <usb.h>
#include <usb/xhci.h>
struct xhci_pci_plat {
struct reset_ctl reset;
};
static int xhci_pci_init(struct udevice *dev, struct xhci_hccr **ret_hccr,
struct xhci_hcor **ret_hcor)
{
struct xhci_hccr *hccr;
struct xhci_hcor *hcor;
u32 cmd;
hccr = (struct xhci_hccr *)dm_pci_map_bar(dev,
PCI_BASE_ADDRESS_0, 0, 0, PCI_REGION_TYPE,
PCI_REGION_MEM);
if (!hccr) {
printf("xhci-pci init cannot map PCI mem bar\n");
return -EIO;
}
hcor = (struct xhci_hcor *)((uintptr_t) hccr +
HC_LENGTH(xhci_readl(&hccr->cr_capbase)));
debug("XHCI-PCI init hccr %p and hcor %p hc_length %d\n",
hccr, hcor, (u32)HC_LENGTH(xhci_readl(&hccr->cr_capbase)));
*ret_hccr = hccr;
*ret_hcor = hcor;
/* enable busmaster */
dm_pci_read_config32(dev, PCI_COMMAND, &cmd);
cmd |= PCI_COMMAND_MASTER;
dm_pci_write_config32(dev, PCI_COMMAND, cmd);
return 0;
}
static int xhci_pci_probe(struct udevice *dev)
{
struct xhci_pci_plat *plat = dev_get_plat(dev);
struct xhci_hccr *hccr;
struct xhci_hcor *hcor;
int ret;
ret = reset_get_by_index(dev, 0, &plat->reset);
if (ret && ret != -ENOENT && ret != -ENOTSUPP) {
dev_err(dev, "failed to get reset\n");
return ret;
}
if (reset_valid(&plat->reset)) {
ret = reset_assert(&plat->reset);
if (ret)
goto err_reset;
ret = reset_deassert(&plat->reset);
if (ret)
goto err_reset;
}
ret = xhci_pci_init(dev, &hccr, &hcor);
if (ret)
goto err_reset;
ret = xhci_register(dev, hccr, hcor);
if (ret)
goto err_reset;
return 0;
err_reset:
if (reset_valid(&plat->reset))
reset_free(&plat->reset);
return ret;
}
static int xhci_pci_remove(struct udevice *dev)
{
struct xhci_pci_plat *plat = dev_get_plat(dev);
xhci_deregister(dev);
if (reset_valid(&plat->reset))
reset_free(&plat->reset);
return 0;
}
static const struct udevice_id xhci_pci_ids[] = {
{ .compatible = "xhci-pci" },
{ }
};
U_BOOT_DRIVER(xhci_pci) = {
.name = "xhci_pci",
.id = UCLASS_USB,
.probe = xhci_pci_probe,
.remove = xhci_pci_remove,
.of_match = xhci_pci_ids,
.ops = &xhci_usb_ops,
.plat_auto = sizeof(struct xhci_pci_plat),
.priv_auto = sizeof(struct xhci_ctrl),
.flags = DM_FLAG_OS_PREPARE | DM_FLAG_ALLOC_PRIV_DMA,
};
static struct pci_device_id xhci_pci_supported[] = {
{ PCI_DEVICE_CLASS(PCI_CLASS_SERIAL_USB_XHCI, ~0) },
{},
};
U_BOOT_PCI_DEVICE(xhci_pci, xhci_pci_supported);
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