xref: /openbmc/u-boot/drivers/usb/host/xhci-pci.c (revision 103c45fb)
1 // SPDX-License-Identifier: GPL-2.0
2 /*
3  * Copyright (c) 2015, Google, Inc
4  * Written by Simon Glass <sjg@chromium.org>
5  * All rights reserved.
6  */
7 
8 #include <common.h>
9 #include <dm.h>
10 #include <pci.h>
11 #include <usb.h>
12 #include "xhci.h"
13 
xhci_pci_init(struct udevice * dev,struct xhci_hccr ** ret_hccr,struct xhci_hcor ** ret_hcor)14 static void xhci_pci_init(struct udevice *dev, struct xhci_hccr **ret_hccr,
15 			  struct xhci_hcor **ret_hcor)
16 {
17 	struct xhci_hccr *hccr;
18 	struct xhci_hcor *hcor;
19 	u32 cmd;
20 
21 	hccr = (struct xhci_hccr *)dm_pci_map_bar(dev,
22 			PCI_BASE_ADDRESS_0, PCI_REGION_MEM);
23 	hcor = (struct xhci_hcor *)((uintptr_t) hccr +
24 			HC_LENGTH(xhci_readl(&hccr->cr_capbase)));
25 
26 	debug("XHCI-PCI init hccr %p and hcor %p hc_length %d\n",
27 	      hccr, hcor, (u32)HC_LENGTH(xhci_readl(&hccr->cr_capbase)));
28 
29 	*ret_hccr = hccr;
30 	*ret_hcor = hcor;
31 
32 	/* enable busmaster */
33 	dm_pci_read_config32(dev, PCI_COMMAND, &cmd);
34 	cmd |= PCI_COMMAND_MASTER;
35 	dm_pci_write_config32(dev, PCI_COMMAND, cmd);
36 }
37 
xhci_pci_probe(struct udevice * dev)38 static int xhci_pci_probe(struct udevice *dev)
39 {
40 	struct xhci_hccr *hccr;
41 	struct xhci_hcor *hcor;
42 
43 	xhci_pci_init(dev, &hccr, &hcor);
44 
45 	return xhci_register(dev, hccr, hcor);
46 }
47 
48 static const struct udevice_id xhci_pci_ids[] = {
49 	{ .compatible = "xhci-pci" },
50 	{ }
51 };
52 
53 U_BOOT_DRIVER(xhci_pci) = {
54 	.name	= "xhci_pci",
55 	.id	= UCLASS_USB,
56 	.probe = xhci_pci_probe,
57 	.remove = xhci_deregister,
58 	.of_match = xhci_pci_ids,
59 	.ops	= &xhci_usb_ops,
60 	.platdata_auto_alloc_size = sizeof(struct usb_platdata),
61 	.priv_auto_alloc_size = sizeof(struct xhci_ctrl),
62 	.flags	= DM_FLAG_ALLOC_PRIV_DMA,
63 };
64 
65 static struct pci_device_id xhci_pci_supported[] = {
66 	{ PCI_DEVICE_CLASS(PCI_CLASS_SERIAL_USB_XHCI, ~0) },
67 	{},
68 };
69 
70 U_BOOT_PCI_DEVICE(xhci_pci, xhci_pci_supported);
71