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 <dm.h> 10 #include "ehci.h" 11 12 /* 13 * Even though here we don't explicitly use "struct ehci_ctrl" 14 * ehci_register() expects it to be the first thing that resides in 15 * device's private data. 16 */ 17 struct generic_ehci { 18 struct ehci_ctrl ctrl; 19 }; 20 21 static int ehci_usb_probe(struct udevice *dev) 22 { 23 struct ehci_hccr *hccr = (struct ehci_hccr *)dev_get_addr(dev); 24 struct ehci_hcor *hcor; 25 int i; 26 27 for (i = 0; ; i++) { 28 struct udevice *clk_dev; 29 int clk_id; 30 31 clk_id = clk_get_by_index(dev, i, &clk_dev); 32 if (clk_id < 0) 33 break; 34 if (clk_enable(clk_dev, clk_id)) 35 printf("failed to enable clock (dev=%s, id=%d)\n", 36 clk_dev->name, clk_id); 37 } 38 39 hcor = (struct ehci_hcor *)((uintptr_t)hccr + 40 HC_LENGTH(ehci_readl(&hccr->cr_capbase))); 41 42 return ehci_register(dev, hccr, hcor, NULL, 0, USB_INIT_HOST); 43 } 44 45 static int ehci_usb_remove(struct udevice *dev) 46 { 47 return ehci_deregister(dev); 48 } 49 50 static const struct udevice_id ehci_usb_ids[] = { 51 { .compatible = "generic-ehci" }, 52 { } 53 }; 54 55 U_BOOT_DRIVER(ehci_generic) = { 56 .name = "ehci_generic", 57 .id = UCLASS_USB, 58 .of_match = ehci_usb_ids, 59 .probe = ehci_usb_probe, 60 .remove = ehci_usb_remove, 61 .ops = &ehci_usb_ops, 62 .priv_auto_alloc_size = sizeof(struct generic_ehci), 63 .flags = DM_FLAG_ALLOC_PRIV_DMA, 64 }; 65