1 /* 2 * Copyright (C) 2015 Marvell International Ltd. 3 * 4 * MVEBU USB HOST xHCI Controller 5 * 6 * SPDX-License-Identifier: GPL-2.0+ 7 */ 8 9 #include <common.h> 10 #include <dm.h> 11 #include <fdtdec.h> 12 #include <usb.h> 13 #include <power/regulator.h> 14 #include <asm/gpio.h> 15 16 #include "xhci.h" 17 18 struct mvebu_xhci_platdata { 19 fdt_addr_t hcd_base; 20 }; 21 22 /** 23 * Contains pointers to register base addresses 24 * for the usb controller. 25 */ 26 struct mvebu_xhci { 27 struct xhci_ctrl ctrl; /* Needs to come first in this struct! */ 28 struct usb_platdata usb_plat; 29 struct xhci_hccr *hcd; 30 }; 31 32 /* 33 * Dummy implementation that can be overwritten by a board 34 * specific function 35 */ 36 __weak int board_xhci_enable(fdt_addr_t base) 37 { 38 return 0; 39 } 40 41 static int xhci_usb_probe(struct udevice *dev) 42 { 43 struct mvebu_xhci_platdata *plat = dev_get_platdata(dev); 44 struct mvebu_xhci *ctx = dev_get_priv(dev); 45 struct xhci_hcor *hcor; 46 int len, ret; 47 struct udevice *regulator; 48 49 ctx->hcd = (struct xhci_hccr *)plat->hcd_base; 50 len = HC_LENGTH(xhci_readl(&ctx->hcd->cr_capbase)); 51 hcor = (struct xhci_hcor *)((uintptr_t)ctx->hcd + len); 52 53 ret = device_get_supply_regulator(dev, "vbus-supply", ®ulator); 54 if (!ret) { 55 ret = regulator_set_enable(regulator, true); 56 if (ret) { 57 printf("Failed to turn ON the VBUS regulator\n"); 58 return ret; 59 } 60 } 61 62 /* Enable USB xHCI (VBUS, reset etc) in board specific code */ 63 board_xhci_enable(devfdt_get_addr_index(dev, 1)); 64 65 return xhci_register(dev, ctx->hcd, hcor); 66 } 67 68 static int xhci_usb_ofdata_to_platdata(struct udevice *dev) 69 { 70 struct mvebu_xhci_platdata *plat = dev_get_platdata(dev); 71 72 /* 73 * Get the base address for XHCI controller from the device node 74 */ 75 plat->hcd_base = devfdt_get_addr(dev); 76 if (plat->hcd_base == FDT_ADDR_T_NONE) { 77 debug("Can't get the XHCI register base address\n"); 78 return -ENXIO; 79 } 80 81 return 0; 82 } 83 84 static const struct udevice_id xhci_usb_ids[] = { 85 { .compatible = "marvell,armada3700-xhci" }, 86 { .compatible = "marvell,armada-380-xhci" }, 87 { .compatible = "marvell,armada-8k-xhci" }, 88 { } 89 }; 90 91 U_BOOT_DRIVER(usb_xhci) = { 92 .name = "xhci_mvebu", 93 .id = UCLASS_USB, 94 .of_match = xhci_usb_ids, 95 .ofdata_to_platdata = xhci_usb_ofdata_to_platdata, 96 .probe = xhci_usb_probe, 97 .remove = xhci_deregister, 98 .ops = &xhci_usb_ops, 99 .platdata_auto_alloc_size = sizeof(struct mvebu_xhci_platdata), 100 .priv_auto_alloc_size = sizeof(struct mvebu_xhci), 101 .flags = DM_FLAG_ALLOC_PRIV_DMA, 102 }; 103