1 // SPDX-License-Identifier: GPL-2.0+
3 * Copyright (C) 2015 Alexey Brodkin <abrodkin@synopsys.com>
10 #include <generic-phy.h>
14 #if !defined(CONFIG_USB_OHCI_NEW)
15 # error "Generic OHCI driver requires CONFIG_USB_OHCI_NEW"
20 struct clk *clocks; /* clock list */
21 struct reset_ctl *resets; /* reset list */
23 int clock_count; /* number of clock in clock list */
24 int reset_count; /* number of reset in reset list */
27 static int ohci_setup_phy(struct udevice *dev, int index)
29 struct generic_ohci *priv = dev_get_priv(dev);
32 ret = generic_phy_get_by_index(dev, index, &priv->phy);
35 dev_err(dev, "failed to get usb phy\n");
39 ret = generic_phy_init(&priv->phy);
41 dev_err(dev, "failed to init usb phy\n");
45 ret = generic_phy_power_on(&priv->phy);
47 dev_err(dev, "failed to power on usb phy\n");
48 return generic_phy_exit(&priv->phy);
55 static int ohci_shutdown_phy(struct udevice *dev)
57 struct generic_ohci *priv = dev_get_priv(dev);
60 if (generic_phy_valid(&priv->phy)) {
61 ret = generic_phy_power_off(&priv->phy);
63 dev_err(dev, "failed to power off usb phy\n");
67 ret = generic_phy_exit(&priv->phy);
69 dev_err(dev, "failed to power off usb phy\n");
77 static int ohci_usb_probe(struct udevice *dev)
79 struct ohci_regs *regs = (struct ohci_regs *)devfdt_get_addr(dev);
80 struct generic_ohci *priv = dev_get_priv(dev);
81 int i, err, ret, clock_nb, reset_nb;
84 priv->clock_count = 0;
85 clock_nb = dev_count_phandle_with_args(dev, "clocks", "#clock-cells");
87 priv->clocks = devm_kcalloc(dev, clock_nb, sizeof(struct clk),
92 for (i = 0; i < clock_nb; i++) {
93 err = clk_get_by_index(dev, i, &priv->clocks[i]);
97 err = clk_enable(&priv->clocks[i]);
99 dev_err(dev, "failed to enable clock %d\n", i);
100 clk_free(&priv->clocks[i]);
105 } else if (clock_nb != -ENOENT) {
106 dev_err(dev, "failed to get clock phandle(%d)\n", clock_nb);
110 priv->reset_count = 0;
111 reset_nb = dev_count_phandle_with_args(dev, "resets", "#reset-cells");
113 priv->resets = devm_kcalloc(dev, reset_nb,
114 sizeof(struct reset_ctl),
119 for (i = 0; i < reset_nb; i++) {
120 err = reset_get_by_index(dev, i, &priv->resets[i]);
124 err = reset_deassert(&priv->resets[i]);
126 dev_err(dev, "failed to deassert reset %d\n", i);
127 reset_free(&priv->resets[i]);
132 } else if (reset_nb != -ENOENT) {
133 dev_err(dev, "failed to get reset phandle(%d)\n", reset_nb);
137 err = ohci_setup_phy(dev, 0);
141 err = ohci_register(dev, regs);
148 ret = ohci_shutdown_phy(dev);
150 dev_err(dev, "failed to shutdown usb phy\n");
153 ret = reset_release_all(priv->resets, priv->reset_count);
155 dev_err(dev, "failed to assert all resets\n");
157 ret = clk_release_all(priv->clocks, priv->clock_count);
159 dev_err(dev, "failed to disable all clocks\n");
164 static int ohci_usb_remove(struct udevice *dev)
166 struct generic_ohci *priv = dev_get_priv(dev);
169 ret = ohci_deregister(dev);
173 ret = ohci_shutdown_phy(dev);
177 ret = reset_release_all(priv->resets, priv->reset_count);
181 return clk_release_all(priv->clocks, priv->clock_count);
184 static const struct udevice_id ohci_usb_ids[] = {
185 { .compatible = "generic-ohci" },
189 U_BOOT_DRIVER(ohci_generic) = {
190 .name = "ohci_generic",
192 .of_match = ohci_usb_ids,
193 .probe = ohci_usb_probe,
194 .remove = ohci_usb_remove,
195 .ops = &ohci_usb_ops,
196 .priv_auto_alloc_size = sizeof(struct generic_ohci),
197 .flags = DM_FLAG_ALLOC_PRIV_DMA,