projects / u-boot.git / blame
| Commit | Line | Data |
|---|---|---|
| b6fbcb0a PR |
1 | // SPDX-License-Identifier: GPL-2.0+ |
| 2 | /* | |
| 3 | * Copyright (C) 2024 9elements GmbH | |
| 4 | * | |
| 5 | * GENERIC USB HOST xHCI Controller | |
| 6 | */ | |
| 7 | #include <dm.h> | |
| 8 | #include <fdtdec.h> | |
| 9 | #include <log.h> | |
| 10 | #include <usb.h> | |
| 11 | #include <asm/io.h> | |
| 12 | #include <dm/device_compat.h> | |
| 13 | #include <usb/xhci.h> | |
| 14 | ||
| 15 | struct generic_xhci_plat { | |
| 16 | fdt_addr_t hcd_base; | |
| 17 | }; | |
| 18 | ||
| 19 | /** | |
| 20 | * Contains pointers to register base addresses | |
| 21 | * for the usb controller. | |
| 22 | */ | |
| 23 | struct generic_xhci { | |
| 24 | struct xhci_ctrl ctrl; /* Needs to come first in this struct! */ | |
| 25 | struct usb_plat usb_plat; | |
| 26 | struct xhci_hccr *hcd; | |
| 27 | }; | |
| 28 | ||
| 29 | static int xhci_usb_probe(struct udevice *dev) | |
| 30 | { | |
| 31 | struct generic_xhci_plat *plat = dev_get_plat(dev); | |
| 32 | struct generic_xhci *ctx = dev_get_priv(dev); | |
| 33 | struct xhci_hcor *hcor; | |
| 34 | int len; | |
| 35 | ||
| 36 | ctx->hcd = (struct xhci_hccr *)phys_to_virt(plat->hcd_base); | |
| 37 | len = HC_LENGTH(xhci_readl(&ctx->hcd->cr_capbase)); | |
| 38 | hcor = (struct xhci_hcor *)((uintptr_t)ctx->hcd + len); | |
| 39 | ||
| 40 | return xhci_register(dev, ctx->hcd, hcor); | |
| 41 | } | |
| 42 | ||
| 43 | static int xhci_usb_of_to_plat(struct udevice *dev) | |
| 44 | { | |
| 45 | struct generic_xhci_plat *plat = dev_get_plat(dev); | |
| 46 | ||
| 47 | /* | |
| 48 | * Get the base address for XHCI controller from the device node | |
| 49 | */ | |
| 50 | plat->hcd_base = dev_read_addr(dev); | |
| 51 | if (plat->hcd_base == FDT_ADDR_T_NONE) { | |
| 52 | dev_dbg(dev, "Can't get the XHCI register base address\n"); | |
| 53 | return -ENXIO; | |
| 54 | } | |
| 55 | ||
| 56 | return 0; | |
| 57 | } | |
| 58 | ||
| 59 | static const struct udevice_id xhci_usb_ids[] = { | |
| 60 | { .compatible = "generic-xhci" }, | |
| 61 | { } | |
| 62 | }; | |
| 63 | ||
| 64 | U_BOOT_DRIVER(usb_xhci) = { | |
| 65 | .name = "xhci_generic", | |
| 66 | .id = UCLASS_USB, | |
| 67 | .of_match = xhci_usb_ids, | |
| 68 | .of_to_plat = xhci_usb_of_to_plat, | |
| 69 | .probe = xhci_usb_probe, | |
| 70 | .remove = xhci_deregister, | |
| 71 | .ops = &xhci_usb_ops, | |
| 72 | .plat_auto = sizeof(struct generic_xhci_plat), | |
| 73 | .priv_auto = sizeof(struct generic_xhci), | |
| 74 | .flags = DM_FLAG_ALLOC_PRIV_DMA, | |
| 75 | }; |