1 /* 2 * Copyright (C) 2015 Alexey Brodkin <abrodkin@synopsys.com> 3 * 4 * SPDX-License-Identifier: GPL-2.0+ 5 */ 6 7 #include <common.h> 8 #include <clk.h> 9 #include <reset.h> 10 #include <asm/io.h> 11 #include <dm.h> 12 #include "ehci.h" 13 14 /* 15 * Even though here we don't explicitly use "struct ehci_ctrl" 16 * ehci_register() expects it to be the first thing that resides in 17 * device's private data. 18 */ 19 struct generic_ehci { 20 struct ehci_ctrl ctrl; 21 }; 22 23 static int ehci_usb_probe(struct udevice *dev) 24 { 25 struct ehci_hccr *hccr; 26 struct ehci_hcor *hcor; 27 int i; 28 29 for (i = 0; ; i++) { 30 struct clk clk; 31 int ret; 32 33 ret = clk_get_by_index(dev, i, &clk); 34 if (ret < 0) 35 break; 36 if (clk_enable(&clk)) 37 printf("failed to enable clock %d\n", i); 38 clk_free(&clk); 39 } 40 41 for (i = 0; ; i++) { 42 struct reset_ctl reset; 43 int ret; 44 45 ret = reset_get_by_index(dev, i, &reset); 46 if (ret < 0) 47 break; 48 if (reset_deassert(&reset)) 49 printf("failed to deassert reset %d\n", i); 50 reset_free(&reset); 51 } 52 53 hccr = map_physmem(dev_get_addr(dev), 0x100, MAP_NOCACHE); 54 hcor = (struct ehci_hcor *)((uintptr_t)hccr + 55 HC_LENGTH(ehci_readl(&hccr->cr_capbase))); 56 57 return ehci_register(dev, hccr, hcor, NULL, 0, USB_INIT_HOST); 58 } 59 60 static const struct udevice_id ehci_usb_ids[] = { 61 { .compatible = "generic-ehci" }, 62 { } 63 }; 64 65 U_BOOT_DRIVER(ehci_generic) = { 66 .name = "ehci_generic", 67 .id = UCLASS_USB, 68 .of_match = ehci_usb_ids, 69 .probe = ehci_usb_probe, 70 .remove = ehci_deregister, 71 .ops = &ehci_usb_ops, 72 .priv_auto_alloc_size = sizeof(struct generic_ehci), 73 .flags = DM_FLAG_ALLOC_PRIV_DMA, 74 }; 75