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 <init.h>
11 #include <log.h>
12 #include <pci.h>
13 #include <usb.h>
14 #include <usb/xhci.h>
15
xhci_pci_init(struct udevice * dev,struct xhci_hccr ** ret_hccr,struct xhci_hcor ** ret_hcor)16 static int xhci_pci_init(struct udevice *dev, struct xhci_hccr **ret_hccr,
17 struct xhci_hcor **ret_hcor)
18 {
19 struct xhci_hccr *hccr;
20 struct xhci_hcor *hcor;
21 u32 cmd;
22
23 hccr = (struct xhci_hccr *)dm_pci_map_bar(dev,
24 PCI_BASE_ADDRESS_0, PCI_REGION_MEM);
25 if (!hccr) {
26 printf("xhci-pci init cannot map PCI mem bar\n");
27 return -EIO;
28 }
29
30 hcor = (struct xhci_hcor *)((uintptr_t) hccr +
31 HC_LENGTH(xhci_readl(&hccr->cr_capbase)));
32
33 debug("XHCI-PCI init hccr %p and hcor %p hc_length %d\n",
34 hccr, hcor, (u32)HC_LENGTH(xhci_readl(&hccr->cr_capbase)));
35
36 *ret_hccr = hccr;
37 *ret_hcor = hcor;
38
39 /* enable busmaster */
40 dm_pci_read_config32(dev, PCI_COMMAND, &cmd);
41 cmd |= PCI_COMMAND_MASTER;
42 dm_pci_write_config32(dev, PCI_COMMAND, cmd);
43 return 0;
44 }
45
xhci_pci_probe(struct udevice * dev)46 static int xhci_pci_probe(struct udevice *dev)
47 {
48 struct xhci_hccr *hccr;
49 struct xhci_hcor *hcor;
50 int ret;
51
52 ret = xhci_pci_init(dev, &hccr, &hcor);
53 if (ret)
54 return ret;
55
56 return xhci_register(dev, hccr, hcor);
57 }
58
59 static const struct udevice_id xhci_pci_ids[] = {
60 { .compatible = "xhci-pci" },
61 { }
62 };
63
64 U_BOOT_DRIVER(xhci_pci) = {
65 .name = "xhci_pci",
66 .id = UCLASS_USB,
67 .probe = xhci_pci_probe,
68 .remove = xhci_deregister,
69 .of_match = xhci_pci_ids,
70 .ops = &xhci_usb_ops,
71 .plat_auto = sizeof(struct usb_plat),
72 .priv_auto = sizeof(struct xhci_ctrl),
73 .flags = DM_FLAG_OS_PREPARE | DM_FLAG_ALLOC_PRIV_DMA,
74 };
75
76 static struct pci_device_id xhci_pci_supported[] = {
77 { PCI_DEVICE_CLASS(PCI_CLASS_SERIAL_USB_XHCI, ~0) },
78 {},
79 };
80
81 U_BOOT_PCI_DEVICE(xhci_pci, xhci_pci_supported);
82