xref: /openbmc/u-boot/drivers/usb/host/ehci-pci.c (revision 67cf22cbdef8c62ffa28b4caf935825fe410c68d)

// SPDX-License-Identifier: GPL-2.0
/*-
 * Copyright (c) 2007-2008, Juniper Networks, Inc.
 * All rights reserved.
 */

#include <common.h>
#include <dm.h>
#include <errno.h>
#include <pci.h>
#include <usb.h>
#include <asm/io.h>

#include "ehci.h"

/* Information about a USB port */
struct ehci_pci_priv {
	struct ehci_ctrl ehci;
	struct phy phy;
};

#if CONFIG_IS_ENABLED(DM_USB)
static int ehci_pci_init(struct udevice *dev, struct ehci_hccr **ret_hccr,
			  struct ehci_hcor **ret_hcor)
{
	struct ehci_pci_priv *priv = dev_get_priv(dev);
	struct ehci_hccr *hccr;
	struct ehci_hcor *hcor;
	int ret;
	u32 cmd;

	ret = ehci_setup_phy(dev, &priv->phy, 0);
	if (ret)
		return ret;

	hccr = (struct ehci_hccr *)dm_pci_map_bar(dev,
			PCI_BASE_ADDRESS_0, PCI_REGION_MEM);
	hcor = (struct ehci_hcor *)((uintptr_t) hccr +
			HC_LENGTH(ehci_readl(&hccr->cr_capbase)));

	debug("EHCI-PCI init hccr %#lx and hcor %#lx hc_length %d\n",
	      (ulong)hccr, (ulong)hcor,
	      (u32)HC_LENGTH(ehci_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;
}

#else

#ifdef CONFIG_PCI_EHCI_DEVICE
static struct pci_device_id ehci_pci_ids[] = {
	/* Please add supported PCI EHCI controller ids here */
	{0x1033, 0x00E0},	/* NEC */
	{0x10B9, 0x5239},	/* ULI1575 PCI EHCI module ids */
	{0x12D8, 0x400F},	/* Pericom */
	{0, 0}
};
#endif

static void ehci_pci_legacy_init(pci_dev_t pdev, struct ehci_hccr **ret_hccr,
				 struct ehci_hcor **ret_hcor)
{
	struct ehci_hccr *hccr;
	struct ehci_hcor *hcor;
	u32 cmd;

	hccr = (struct ehci_hccr *)pci_map_bar(pdev,
			PCI_BASE_ADDRESS_0, PCI_REGION_MEM);
	hcor = (struct ehci_hcor *)((uintptr_t) hccr +
			HC_LENGTH(ehci_readl(&hccr->cr_capbase)));

	debug("EHCI-PCI init hccr 0x%x and hcor 0x%x hc_length %d\n",
	      (u32)hccr, (u32)hcor,
	      (u32)HC_LENGTH(ehci_readl(&hccr->cr_capbase)));

	*ret_hccr = hccr;
	*ret_hcor = hcor;

	/* enable busmaster */
	pci_read_config_dword(pdev, PCI_COMMAND, &cmd);
	cmd |= PCI_COMMAND_MASTER;
	pci_write_config_dword(pdev, PCI_COMMAND, cmd);
}

/*
 * Create the appropriate control structures to manage
 * a new EHCI host controller.
 */
int ehci_hcd_init(int index, enum usb_init_type init,
		struct ehci_hccr **ret_hccr, struct ehci_hcor **ret_hcor)
{
	pci_dev_t pdev;

#ifdef CONFIG_PCI_EHCI_DEVICE
	pdev = pci_find_devices(ehci_pci_ids, CONFIG_PCI_EHCI_DEVICE);
#else
	pdev = pci_find_class(PCI_CLASS_SERIAL_USB_EHCI, index);
#endif
	if (pdev < 0) {
		printf("EHCI host controller not found\n");
		return -1;
	}
	ehci_pci_legacy_init(pdev, ret_hccr, ret_hcor);

	return 0;
}

/*
 * Destroy the appropriate control structures corresponding
 * the the EHCI host controller.
 */
int ehci_hcd_stop(int index)
{
	return 0;
}
#endif /* !CONFIG_IS_ENABLED(DM_USB) */

#if CONFIG_IS_ENABLED(DM_USB)
static int ehci_pci_probe(struct udevice *dev)
{
	struct ehci_hccr *hccr;
	struct ehci_hcor *hcor;
	int ret;

	ret = ehci_pci_init(dev, &hccr, &hcor);
	if (ret)
		return ret;

	return ehci_register(dev, hccr, hcor, NULL, 0, USB_INIT_HOST);
}

static int ehci_pci_remove(struct udevice *dev)
{
	struct ehci_pci_priv *priv = dev_get_priv(dev);
	int ret;

	ret = ehci_deregister(dev);
	if (ret)
		return ret;

	return ehci_shutdown_phy(dev, &priv->phy);
}

static const struct udevice_id ehci_pci_ids[] = {
	{ .compatible = "ehci-pci" },
	{ }
};

U_BOOT_DRIVER(ehci_pci) = {
	.name	= "ehci_pci",
	.id	= UCLASS_USB,
	.probe = ehci_pci_probe,
	.remove = ehci_pci_remove,
	.of_match = ehci_pci_ids,
	.ops	= &ehci_usb_ops,
	.platdata_auto_alloc_size = sizeof(struct usb_platdata),
	.priv_auto_alloc_size = sizeof(struct ehci_pci_priv),
	.flags	= DM_FLAG_ALLOC_PRIV_DMA,
};

static struct pci_device_id ehci_pci_supported[] = {
	{ PCI_DEVICE_CLASS(PCI_CLASS_SERIAL_USB_EHCI, ~0) },
	{},
};

U_BOOT_PCI_DEVICE(ehci_pci, ehci_pci_supported);

#endif /* CONFIG_IS_ENABLED(DM_USB) */