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
aspeed_ehci_powerup_fixup(struct ehci_ctrl * ctrl,uint32_t * status_reg,uint32_t * reg)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
ehci_aspeed_probe(struct udevice * dev)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