2 * Copyright (C) 2015 Alexey Brodkin <abrodkin@synopsys.com>
4 * SPDX-License-Identifier: GPL-2.0+
10 #include <dm/ofnode.h>
11 #include <generic-phy.h>
15 #if !defined(CONFIG_USB_OHCI_NEW)
16 # error "Generic OHCI driver requires CONFIG_USB_OHCI_NEW"
21 struct clk *clocks; /* clock list */
22 struct reset_ctl *resets; /* reset list */
24 int clock_count; /* number of clock in clock list */
25 int reset_count; /* number of reset in reset list */
28 static int ohci_usb_probe(struct udevice *dev)
30 struct ohci_regs *regs = (struct ohci_regs *)devfdt_get_addr(dev);
31 struct generic_ohci *priv = dev_get_priv(dev);
32 int i, err, ret, clock_nb, reset_nb;
35 priv->clock_count = 0;
36 clock_nb = dev_count_phandle_with_args(dev, "clocks", "#clock-cells");
38 priv->clocks = devm_kcalloc(dev, clock_nb, sizeof(struct clk),
43 for (i = 0; i < clock_nb; i++) {
44 err = clk_get_by_index(dev, i, &priv->clocks[i]);
48 err = clk_enable(&priv->clocks[i]);
50 error("failed to enable clock %d\n", i);
51 clk_free(&priv->clocks[i]);
56 } else if (clock_nb != -ENOENT) {
57 error("failed to get clock phandle(%d)\n", clock_nb);
61 priv->reset_count = 0;
62 reset_nb = dev_count_phandle_with_args(dev, "resets", "#reset-cells");
64 priv->resets = devm_kcalloc(dev, reset_nb,
65 sizeof(struct reset_ctl),
70 for (i = 0; i < reset_nb; i++) {
71 err = reset_get_by_index(dev, i, &priv->resets[i]);
75 err = reset_deassert(&priv->resets[i]);
77 error("failed to deassert reset %d\n", i);
78 reset_free(&priv->resets[i]);
83 } else if (reset_nb != -ENOENT) {
84 error("failed to get reset phandle(%d)\n", reset_nb);
88 err = generic_phy_get_by_index(dev, 0, &priv->phy);
91 error("failed to get usb phy\n");
96 err = generic_phy_init(&priv->phy);
98 error("failed to init usb phy\n");
103 err = ohci_register(dev, regs);
110 if (generic_phy_valid(&priv->phy)) {
111 ret = generic_phy_exit(&priv->phy);
113 error("failed to release phy\n");
117 ret = reset_release_all(priv->resets, priv->reset_count);
119 error("failed to assert all resets\n");
121 ret = clk_release_all(priv->clocks, priv->clock_count);
123 error("failed to disable all clocks\n");
128 static int ohci_usb_remove(struct udevice *dev)
130 struct generic_ohci *priv = dev_get_priv(dev);
133 ret = ohci_deregister(dev);
137 if (generic_phy_valid(&priv->phy)) {
138 ret = generic_phy_exit(&priv->phy);
143 ret = reset_release_all(priv->resets, priv->reset_count);
147 return clk_release_all(priv->clocks, priv->clock_count);
150 static const struct udevice_id ohci_usb_ids[] = {
151 { .compatible = "generic-ohci" },
155 U_BOOT_DRIVER(ohci_generic) = {
156 .name = "ohci_generic",
158 .of_match = ohci_usb_ids,
159 .probe = ohci_usb_probe,
160 .remove = ohci_usb_remove,
161 .ops = &ohci_usb_ops,
162 .priv_auto_alloc_size = sizeof(struct generic_ohci),
163 .flags = DM_FLAG_ALLOC_PRIV_DMA,