[thirdparty/u-boot.git] / drivers / usb / host / xhci-pci.c

// 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);
Commit	Line	Data
83d290c5	1	// SPDX-License-Identifier: GPL-2.0
316328f5 SG	2	/*
	3	* Copyright (c) 2015, Google, Inc
	4	* Written by Simon Glass <sjg@chromium.org>
	5	* All rights reserved.
316328f5 SG	6	*/
316328f5 SG	7
d678a59d	8	#include <common.h>
555a3472	9	#include <dm.h>
70a98caf	10	#include <dm/device_compat.h>
691d719d	11	#include <init.h>
f7ae49fc	12	#include <log.h>
316328f5	13	#include <pci.h>
70a98caf	14	#include <reset.h>
316328f5	15	#include <usb.h>
1708a123	16	#include <usb/xhci.h>
316328f5	17
70a98caf SH	18	struct xhci_pci_plat {
	19	struct reset_ctl reset;
	20	};
	21
5a5024fe T	22	static int xhci_pci_init(struct udevice dev, struct xhci_hccr *ret_hccr,
5a5024fe T	23	struct xhci_hcor **ret_hcor)
555a3472 SR	24	{
	25	struct xhci_hccr *hccr;
	26	struct xhci_hcor *hcor;
	27	u32 cmd;
	28
	29	hccr = (struct xhci_hccr *)dm_pci_map_bar(dev,
2635e3b5 AS	30	PCI_BASE_ADDRESS_0, 0, 0, PCI_REGION_TYPE,
2635e3b5 AS	31	PCI_REGION_MEM);
5a5024fe T	32	if (!hccr) {
	33	printf("xhci-pci init cannot map PCI mem bar\n");
	34	return -EIO;
	35	}
	36
555a3472 SR	37	hcor = (struct xhci_hcor *)((uintptr_t) hccr +
	38	HC_LENGTH(xhci_readl(&hccr->cr_capbase)));
	39
9fddf6c7 BM	40	debug("XHCI-PCI init hccr %p and hcor %p hc_length %d\n",
9fddf6c7 BM	41	hccr, hcor, (u32)HC_LENGTH(xhci_readl(&hccr->cr_capbase)));
555a3472 SR	42
	43	*ret_hccr = hccr;
	44	*ret_hcor = hcor;
	45
	46	/* enable busmaster */
	47	dm_pci_read_config32(dev, PCI_COMMAND, &cmd);
	48	cmd \|= PCI_COMMAND_MASTER;
	49	dm_pci_write_config32(dev, PCI_COMMAND, cmd);
5a5024fe	50	return 0;
555a3472 SR	51	}
	52
	53	static int xhci_pci_probe(struct udevice *dev)
	54	{
70a98caf	55	struct xhci_pci_plat *plat = dev_get_plat(dev);
555a3472 SR	56	struct xhci_hccr *hccr;
555a3472 SR	57	struct xhci_hcor *hcor;
5a5024fe	58	int ret;
555a3472	59
70a98caf SH	60	ret = reset_get_by_index(dev, 0, &plat->reset);
	61	if (ret && ret != -ENOENT && ret != -ENOTSUPP) {
	62	dev_err(dev, "failed to get reset\n");
	63	return ret;
	64	}
	65
	66	if (reset_valid(&plat->reset)) {
	67	ret = reset_assert(&plat->reset);
	68	if (ret)
	69	goto err_reset;
	70
	71	ret = reset_deassert(&plat->reset);
	72	if (ret)
	73	goto err_reset;
	74	}
	75
5a5024fe T	76	ret = xhci_pci_init(dev, &hccr, &hcor);
5a5024fe T	77	if (ret)
70a98caf SH	78	goto err_reset;
	79
	80	ret = xhci_register(dev, hccr, hcor);
	81	if (ret)
	82	goto err_reset;
	83
	84	return 0;
	85
	86	err_reset:
	87	if (reset_valid(&plat->reset))
	88	reset_free(&plat->reset);
	89
	90	return ret;
	91	}
	92
	93	static int xhci_pci_remove(struct udevice *dev)
	94	{
	95	struct xhci_pci_plat *plat = dev_get_plat(dev);
555a3472	96
70a98caf SH	97	xhci_deregister(dev);
	98	if (reset_valid(&plat->reset))
	99	reset_free(&plat->reset);
	100
	101	return 0;
555a3472 SR	102	}
555a3472 SR	103
555a3472 SR	104	static const struct udevice_id xhci_pci_ids[] = {
	105	{ .compatible = "xhci-pci" },
	106	{ }
	107	};
	108
	109	U_BOOT_DRIVER(xhci_pci) = {
	110	.name = "xhci_pci",
	111	.id = UCLASS_USB,
	112	.probe = xhci_pci_probe,
70a98caf	113	.remove = xhci_pci_remove,
555a3472 SR	114	.of_match = xhci_pci_ids,
555a3472 SR	115	.ops = &xhci_usb_ops,
70a98caf	116	.plat_auto = sizeof(struct xhci_pci_plat),
41575d8e	117	.priv_auto = sizeof(struct xhci_ctrl),
e3bbc1f7	118	.flags = DM_FLAG_OS_PREPARE \| DM_FLAG_ALLOC_PRIV_DMA,
555a3472 SR	119	};
	120
	121	static struct pci_device_id xhci_pci_supported[] = {
	122	{ PCI_DEVICE_CLASS(PCI_CLASS_SERIAL_USB_XHCI, ~0) },
	123	{},
	124	};
	125
	126	U_BOOT_PCI_DEVICE(xhci_pci, xhci_pci_supported);