1 // SPDX-License-Identifier: GPL-2.0+
3 * Copyright (C) 2015 Alexey Brodkin <abrodkin@synopsys.com>
9 #include <dm/device_compat.h>
10 #include <dm/devres.h>
11 #include <dm/ofnode.h>
12 #include <generic-phy.h>
16 #if !defined(CONFIG_USB_OHCI_NEW)
17 # error "Generic OHCI driver requires CONFIG_USB_OHCI_NEW"
22 struct clk *clocks; /* clock list */
23 struct reset_ctl *resets; /* reset list */
25 int clock_count; /* number of clock in clock list */
26 int reset_count; /* number of reset in reset list */
29 static int ohci_setup_phy(struct udevice *dev, int index)
31 struct generic_ohci *priv = dev_get_priv(dev);
34 ret = generic_phy_get_by_index(dev, index, &priv->phy);
37 dev_err(dev, "failed to get usb phy\n");
41 ret = generic_phy_init(&priv->phy);
43 dev_err(dev, "failed to init usb phy\n");
47 ret = generic_phy_power_on(&priv->phy);
49 dev_err(dev, "failed to power on usb phy\n");
50 return generic_phy_exit(&priv->phy);
57 static int ohci_shutdown_phy(struct udevice *dev)
59 struct generic_ohci *priv = dev_get_priv(dev);
62 if (generic_phy_valid(&priv->phy)) {
63 ret = generic_phy_power_off(&priv->phy);
65 dev_err(dev, "failed to power off usb phy\n");
69 ret = generic_phy_exit(&priv->phy);
71 dev_err(dev, "failed to power off usb phy\n");
79 static int ohci_usb_probe(struct udevice *dev)
81 struct ohci_regs *regs = (struct ohci_regs *)devfdt_get_addr(dev);
82 struct generic_ohci *priv = dev_get_priv(dev);
83 int i, err, ret, clock_nb, reset_nb;
86 priv->clock_count = 0;
87 clock_nb = dev_count_phandle_with_args(dev, "clocks", "#clock-cells");
89 priv->clocks = devm_kcalloc(dev, clock_nb, sizeof(struct clk),
94 for (i = 0; i < clock_nb; i++) {
95 err = clk_get_by_index(dev, i, &priv->clocks[i]);
99 err = clk_enable(&priv->clocks[i]);
100 if (err && err != -ENOSYS) {
101 dev_err(dev, "failed to enable clock %d\n", i);
102 clk_free(&priv->clocks[i]);
107 } else if (clock_nb != -ENOENT) {
108 dev_err(dev, "failed to get clock phandle(%d)\n", clock_nb);
112 priv->reset_count = 0;
113 reset_nb = dev_count_phandle_with_args(dev, "resets", "#reset-cells");
115 priv->resets = devm_kcalloc(dev, reset_nb,
116 sizeof(struct reset_ctl),
121 for (i = 0; i < reset_nb; i++) {
122 err = reset_get_by_index(dev, i, &priv->resets[i]);
126 err = reset_deassert(&priv->resets[i]);
128 dev_err(dev, "failed to deassert reset %d\n", i);
129 reset_free(&priv->resets[i]);
134 } else if (reset_nb != -ENOENT) {
135 dev_err(dev, "failed to get reset phandle(%d)\n", reset_nb);
139 err = ohci_setup_phy(dev, 0);
143 err = ohci_register(dev, regs);
150 ret = ohci_shutdown_phy(dev);
152 dev_err(dev, "failed to shutdown usb phy\n");
155 ret = reset_release_all(priv->resets, priv->reset_count);
157 dev_err(dev, "failed to assert all resets\n");
159 ret = clk_release_all(priv->clocks, priv->clock_count);
161 dev_err(dev, "failed to disable all clocks\n");
166 static int ohci_usb_remove(struct udevice *dev)
168 struct generic_ohci *priv = dev_get_priv(dev);
171 ret = ohci_deregister(dev);
175 ret = ohci_shutdown_phy(dev);
179 ret = reset_release_all(priv->resets, priv->reset_count);
183 return clk_release_all(priv->clocks, priv->clock_count);
186 static const struct udevice_id ohci_usb_ids[] = {
187 { .compatible = "generic-ohci" },
191 U_BOOT_DRIVER(ohci_generic) = {
192 .name = "ohci_generic",
194 .of_match = ohci_usb_ids,
195 .probe = ohci_usb_probe,
196 .remove = ohci_usb_remove,
197 .ops = &ohci_usb_ops,
198 .priv_auto_alloc_size = sizeof(struct generic_ohci),
199 .flags = DM_FLAG_ALLOC_PRIV_DMA,