1 // SPDX-License-Identifier: GPL-2.0+
3 * Copyright (C) 2015 Alexey Brodkin <abrodkin@synopsys.com>
10 #include <dm/device_compat.h>
11 #include <dm/devres.h>
12 #include <dm/ofnode.h>
13 #include <generic-phy.h>
17 #if !defined(CONFIG_USB_OHCI_NEW)
18 # error "Generic OHCI driver requires CONFIG_USB_OHCI_NEW"
23 struct clk *clocks; /* clock list */
24 struct reset_ctl *resets; /* reset list */
26 int clock_count; /* number of clock in clock list */
27 int reset_count; /* number of reset in reset list */
30 static int ohci_setup_phy(struct udevice *dev, int index)
32 struct generic_ohci *priv = dev_get_priv(dev);
35 ret = generic_phy_get_by_index(dev, index, &priv->phy);
38 dev_err(dev, "failed to get usb phy\n");
42 ret = generic_phy_init(&priv->phy);
44 dev_dbg(dev, "failed to init usb phy\n");
48 ret = generic_phy_power_on(&priv->phy);
50 dev_dbg(dev, "failed to power on usb phy\n");
51 return generic_phy_exit(&priv->phy);
58 static int ohci_shutdown_phy(struct udevice *dev)
60 struct generic_ohci *priv = dev_get_priv(dev);
63 if (generic_phy_valid(&priv->phy)) {
64 ret = generic_phy_power_off(&priv->phy);
66 dev_dbg(dev, "failed to power off usb phy\n");
70 ret = generic_phy_exit(&priv->phy);
72 dev_dbg(dev, "failed to power off usb phy\n");
80 static int ohci_usb_probe(struct udevice *dev)
82 struct ohci_regs *regs = dev_read_addr_ptr(dev);
83 struct generic_ohci *priv = dev_get_priv(dev);
84 int i, err, ret, clock_nb, reset_nb;
87 priv->clock_count = 0;
88 clock_nb = dev_count_phandle_with_args(dev, "clocks", "#clock-cells",
91 priv->clocks = devm_kcalloc(dev, clock_nb, sizeof(struct clk),
96 for (i = 0; i < clock_nb; i++) {
97 err = clk_get_by_index(dev, i, &priv->clocks[i]);
101 err = clk_enable(&priv->clocks[i]);
102 if (err && err != -ENOSYS) {
103 dev_err(dev, "failed to enable clock %d\n", i);
104 clk_free(&priv->clocks[i]);
109 } else if (clock_nb != -ENOENT) {
110 dev_err(dev, "failed to get clock phandle(%d)\n", clock_nb);
114 priv->reset_count = 0;
115 reset_nb = dev_count_phandle_with_args(dev, "resets", "#reset-cells",
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 err = reset_deassert(&priv->resets[i]);
131 dev_err(dev, "failed to deassert reset %d\n", i);
132 reset_free(&priv->resets[i]);
137 } else if (reset_nb != -ENOENT) {
138 dev_err(dev, "failed to get reset phandle(%d)\n", reset_nb);
142 err = ohci_setup_phy(dev, 0);
146 err = ohci_register(dev, regs);
153 ret = ohci_shutdown_phy(dev);
155 dev_err(dev, "failed to shutdown usb phy\n");
158 ret = reset_release_all(priv->resets, priv->reset_count);
160 dev_err(dev, "failed to assert all resets\n");
162 ret = clk_release_all(priv->clocks, priv->clock_count);
164 dev_err(dev, "failed to disable all clocks\n");
169 static int ohci_usb_remove(struct udevice *dev)
171 struct generic_ohci *priv = dev_get_priv(dev);
174 ret = ohci_deregister(dev);
178 ret = ohci_shutdown_phy(dev);
182 ret = reset_release_all(priv->resets, priv->reset_count);
186 return clk_release_all(priv->clocks, priv->clock_count);
189 static const struct udevice_id ohci_usb_ids[] = {
190 { .compatible = "generic-ohci" },
194 U_BOOT_DRIVER(ohci_generic) = {
195 .name = "ohci_generic",
197 .of_match = ohci_usb_ids,
198 .probe = ohci_usb_probe,
199 .remove = ohci_usb_remove,
200 .ops = &ohci_usb_ops,
201 .priv_auto = sizeof(struct generic_ohci),
202 .flags = DM_FLAG_ALLOC_PRIV_DMA,