2 * Copyright (C) 2015 Alexey Brodkin <abrodkin@synopsys.com>
4 * SPDX-License-Identifier: GPL-2.0+
10 #include <generic-phy.h>
17 * Even though here we don't explicitly use "struct ehci_ctrl"
18 * ehci_register() expects it to be the first thing that resides in
19 * device's private data.
22 struct ehci_ctrl ctrl;
24 struct reset_ctl *resets;
30 static int ehci_usb_probe(struct udevice *dev)
32 struct generic_ehci *priv = dev_get_priv(dev);
33 struct ehci_hccr *hccr;
34 struct ehci_hcor *hcor;
35 int i, err, ret, clock_nb, reset_nb;
38 priv->clock_count = 0;
39 clock_nb = ofnode_count_phandle_with_args(dev_ofnode(dev), "clocks",
42 priv->clocks = devm_kcalloc(dev, clock_nb, sizeof(struct clk),
47 for (i = 0; i < clock_nb; i++) {
48 err = clk_get_by_index(dev, i, &priv->clocks[i]);
52 err = clk_enable(&priv->clocks[i]);
54 error("failed to enable clock %d\n", i);
55 clk_free(&priv->clocks[i]);
61 if (clock_nb != -ENOENT) {
62 error("failed to get clock phandle(%d)\n", clock_nb);
67 priv->reset_count = 0;
68 reset_nb = ofnode_count_phandle_with_args(dev_ofnode(dev), "resets",
71 priv->resets = devm_kcalloc(dev, reset_nb,
72 sizeof(struct reset_ctl),
77 for (i = 0; i < reset_nb; i++) {
78 err = reset_get_by_index(dev, i, &priv->resets[i]);
82 if (reset_deassert(&priv->resets[i])) {
83 error("failed to deassert reset %d\n", i);
84 reset_free(&priv->resets[i]);
90 if (reset_nb != -ENOENT) {
91 error("failed to get reset phandle(%d)\n", reset_nb);
96 err = generic_phy_get_by_index(dev, 0, &priv->phy);
99 error("failed to get usb phy\n");
104 err = generic_phy_init(&priv->phy);
106 error("failed to init usb phy\n");
111 hccr = map_physmem(dev_read_addr(dev), 0x100, MAP_NOCACHE);
112 hcor = (struct ehci_hcor *)((uintptr_t)hccr +
113 HC_LENGTH(ehci_readl(&hccr->cr_capbase)));
115 err = ehci_register(dev, hccr, hcor, NULL, 0, USB_INIT_HOST);
122 if (generic_phy_valid(&priv->phy)) {
123 ret = generic_phy_exit(&priv->phy);
125 error("failed to release phy\n");
129 ret = reset_release_all(priv->resets, priv->reset_count);
131 error("failed to assert all resets\n");
133 ret = clk_release_all(priv->clocks, priv->clock_count);
135 error("failed to disable all clocks\n");
140 static int ehci_usb_remove(struct udevice *dev)
142 struct generic_ehci *priv = dev_get_priv(dev);
145 ret = ehci_deregister(dev);
149 if (generic_phy_valid(&priv->phy)) {
150 ret = generic_phy_exit(&priv->phy);
155 ret = reset_release_all(priv->resets, priv->reset_count);
159 return clk_release_all(priv->clocks, priv->clock_count);
162 static const struct udevice_id ehci_usb_ids[] = {
163 { .compatible = "generic-ehci" },
167 U_BOOT_DRIVER(ehci_generic) = {
168 .name = "ehci_generic",
170 .of_match = ehci_usb_ids,
171 .probe = ehci_usb_probe,
172 .remove = ehci_usb_remove,
173 .ops = &ehci_usb_ops,
174 .priv_auto_alloc_size = sizeof(struct generic_ehci),
175 .flags = DM_FLAG_ALLOC_PRIV_DMA,