1 // SPDX-License-Identifier: GPL-2.0+
3 * Copyright (C) 2015 Alexey Brodkin <abrodkin@synopsys.com>
9 #include <generic-phy.h>
14 #include <power/regulator.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;
26 #ifdef CONFIG_DM_REGULATOR
27 struct udevice *vbus_supply;
33 #ifdef CONFIG_DM_REGULATOR
34 static int ehci_enable_vbus_supply(struct udevice *dev)
36 struct generic_ehci *priv = dev_get_priv(dev);
39 ret = device_get_supply_regulator(dev, "vbus-supply",
41 if (ret && ret != -ENOENT)
44 if (priv->vbus_supply) {
45 ret = regulator_set_enable(priv->vbus_supply, true);
47 dev_err(dev, "Error enabling VBUS supply\n");
51 dev_dbg(dev, "No vbus supply\n");
57 static int ehci_disable_vbus_supply(struct generic_ehci *priv)
59 if (priv->vbus_supply)
60 return regulator_set_enable(priv->vbus_supply, false);
65 static int ehci_enable_vbus_supply(struct udevice *dev)
70 static int ehci_disable_vbus_supply(struct generic_ehci *priv)
76 static int ehci_usb_probe(struct udevice *dev)
78 struct generic_ehci *priv = dev_get_priv(dev);
79 struct ehci_hccr *hccr;
80 struct ehci_hcor *hcor;
81 int i, err, ret, clock_nb, reset_nb;
84 priv->clock_count = 0;
85 clock_nb = ofnode_count_phandle_with_args(dev_ofnode(dev), "clocks",
88 priv->clocks = devm_kcalloc(dev, clock_nb, sizeof(struct clk),
93 for (i = 0; i < clock_nb; i++) {
94 err = clk_get_by_index(dev, i, &priv->clocks[i]);
98 err = clk_enable(&priv->clocks[i]);
100 dev_err(dev, "failed to enable clock %d\n", i);
101 clk_free(&priv->clocks[i]);
107 if (clock_nb != -ENOENT) {
108 dev_err(dev, "failed to get clock phandle(%d)\n",
114 priv->reset_count = 0;
115 reset_nb = ofnode_count_phandle_with_args(dev_ofnode(dev), "resets",
118 priv->resets = devm_kcalloc(dev, reset_nb,
119 sizeof(struct reset_ctl),
124 for (i = 0; i < reset_nb; i++) {
125 err = reset_get_by_index(dev, i, &priv->resets[i]);
129 if (reset_deassert(&priv->resets[i])) {
130 dev_err(dev, "failed to deassert reset %d\n",
132 reset_free(&priv->resets[i]);
138 if (reset_nb != -ENOENT) {
139 dev_err(dev, "failed to get reset phandle(%d)\n",
145 err = ehci_enable_vbus_supply(dev);
149 err = ehci_setup_phy(dev, &priv->phy, 0);
153 hccr = map_physmem(dev_read_addr(dev), 0x100, MAP_NOCACHE);
154 hcor = (struct ehci_hcor *)((uintptr_t)hccr +
155 HC_LENGTH(ehci_readl(&hccr->cr_capbase)));
157 err = ehci_register(dev, hccr, hcor, NULL, 0, USB_INIT_HOST);
164 ret = ehci_shutdown_phy(dev, &priv->phy);
166 dev_err(dev, "failed to shutdown usb phy\n");
169 ret = ehci_disable_vbus_supply(priv);
171 dev_err(dev, "failed to disable VBUS supply\n");
174 ret = reset_release_all(priv->resets, priv->reset_count);
176 dev_err(dev, "failed to assert all resets\n");
178 ret = clk_release_all(priv->clocks, priv->clock_count);
180 dev_err(dev, "failed to disable all clocks\n");
185 static int ehci_usb_remove(struct udevice *dev)
187 struct generic_ehci *priv = dev_get_priv(dev);
190 ret = ehci_deregister(dev);
194 ret = ehci_shutdown_phy(dev, &priv->phy);
198 ret = ehci_disable_vbus_supply(priv);
202 ret = reset_release_all(priv->resets, priv->reset_count);
206 return clk_release_all(priv->clocks, priv->clock_count);
209 static const struct udevice_id ehci_usb_ids[] = {
210 { .compatible = "generic-ehci" },
214 U_BOOT_DRIVER(ehci_generic) = {
215 .name = "ehci_generic",
217 .of_match = ehci_usb_ids,
218 .probe = ehci_usb_probe,
219 .remove = ehci_usb_remove,
220 .ops = &ehci_usb_ops,
221 .priv_auto_alloc_size = sizeof(struct generic_ehci),
222 .flags = DM_FLAG_ALLOC_PRIV_DMA,