1 // SPDX-License-Identifier: GPL-2.0+ 2 /* 3 * Copyright (C) ASPEED Technology Inc. 4 * Ryan Chen <ryan_chen@aspeedtech.com> 5 */ 6 7 #include <common.h> 8 #include <clk.h> 9 #include <dm.h> 10 #include <usb.h> 11 #include <asm/io.h> 12 13 #include "ehci.h" 14 15 struct ehci_aspeed_priv { 16 struct ehci_ctrl ehci; 17 }; 18 19 static void aspeed_ehci_powerup_fixup(struct ehci_ctrl *ctrl, 20 uint32_t *status_reg, uint32_t *reg) 21 { 22 mdelay(50); 23 /* This is to avoid PORT_ENABLE bit to be cleared in "ehci-hcd.c". */ 24 *reg |= EHCI_PS_PE; 25 26 /* For EHCI_PS_CSC to be cleared in ehci_hcd.c */ 27 if (ehci_readl(status_reg) & EHCI_PS_CSC) 28 *reg |= EHCI_PS_CSC; 29 } 30 31 static const struct ehci_ops aspeed_ehci_ops = { 32 .powerup_fixup = aspeed_ehci_powerup_fixup, 33 }; 34 35 static int ehci_aspeed_probe(struct udevice *dev) 36 { 37 struct ehci_hccr *hccr; 38 struct ehci_hcor *hcor; 39 fdt_addr_t hcd_base; 40 struct clk clk; 41 int ret; 42 43 ret = clk_get_by_index(dev, 0, &clk); 44 if (ret) 45 return ret; 46 47 ret = clk_enable(&clk); 48 if (ret) 49 return ret; 50 51 /* 52 * Get the base address for EHCI controller from the device node 53 */ 54 hcd_base = devfdt_get_addr(dev); 55 if (hcd_base == FDT_ADDR_T_NONE) { 56 debug("Can't get the EHCI register base address\n"); 57 return -ENXIO; 58 } 59 60 hccr = (struct ehci_hccr *)hcd_base; 61 hcor = (struct ehci_hcor *) 62 ((u32)hccr + HC_LENGTH(ehci_readl(&hccr->cr_capbase))); 63 64 debug("echi-aspeed: init hccr %x and hcor %x hc_length %d\n", 65 (u32)hccr, (u32)hcor, 66 (u32)HC_LENGTH(ehci_readl(&hccr->cr_capbase))); 67 68 return ehci_register(dev, hccr, hcor, &aspeed_ehci_ops, 0, USB_INIT_HOST); 69 } 70 71 static const struct udevice_id ehci_usb_ids[] = { 72 { .compatible = "aspeed,aspeed-ehci", }, 73 { } 74 }; 75 76 U_BOOT_DRIVER(ehci_aspeed) = { 77 .name = "ehci_aspeed", 78 .id = UCLASS_USB, 79 .of_match = ehci_usb_ids, 80 .probe = ehci_aspeed_probe, 81 .remove = ehci_deregister, 82 .ops = &ehci_usb_ops, 83 .platdata_auto_alloc_size = sizeof(struct usb_platdata), 84 .priv_auto_alloc_size = sizeof(struct ehci_aspeed_priv), 85 .flags = DM_FLAG_ALLOC_PRIV_DMA, 86 }; 87