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_setup_phy(struct udevice *dev, int index)
30 struct generic_ohci *priv = dev_get_priv(dev);
33 ret = generic_phy_get_by_index(dev, index, &priv->phy);
36 dev_err(dev, "failed to get usb phy\n");
40 ret = generic_phy_init(&priv->phy);
42 dev_err(dev, "failed to init usb phy\n");
46 ret = generic_phy_power_on(&priv->phy);
48 dev_err(dev, "failed to power on usb phy\n");
49 return generic_phy_exit(&priv->phy);
56 static int ohci_shutdown_phy(struct udevice *dev)
58 struct generic_ohci *priv = dev_get_priv(dev);
61 if (generic_phy_valid(&priv->phy)) {
62 ret = generic_phy_power_off(&priv->phy);
64 dev_err(dev, "failed to power off usb phy\n");
68 ret = generic_phy_exit(&priv->phy);
70 dev_err(dev, "failed to power off usb phy\n");
78 static int ohci_usb_probe(struct udevice *dev)
80 struct ohci_regs *regs = (struct ohci_regs *)devfdt_get_addr(dev);
81 struct generic_ohci *priv = dev_get_priv(dev);
82 int i, err, ret, clock_nb, reset_nb;
85 priv->clock_count = 0;
86 clock_nb = dev_count_phandle_with_args(dev, "clocks", "#clock-cells");
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]);
106 } else if (clock_nb != -ENOENT) {
107 dev_err(dev, "failed to get clock phandle(%d)\n", clock_nb);
111 priv->reset_count = 0;
112 reset_nb = dev_count_phandle_with_args(dev, "resets", "#reset-cells");
114 priv->resets = devm_kcalloc(dev, reset_nb,
115 sizeof(struct reset_ctl),
120 for (i = 0; i < reset_nb; i++) {
121 err = reset_get_by_index(dev, i, &priv->resets[i]);
125 err = reset_deassert(&priv->resets[i]);
127 dev_err(dev, "failed to deassert reset %d\n", i);
128 reset_free(&priv->resets[i]);
133 } else if (reset_nb != -ENOENT) {
134 dev_err(dev, "failed to get reset phandle(%d)\n", reset_nb);
138 err = ohci_setup_phy(dev, 0);
142 err = ohci_register(dev, regs);
149 ret = ohci_shutdown_phy(dev);
151 dev_err(dev, "failed to shutdown usb phy\n");
154 ret = reset_release_all(priv->resets, priv->reset_count);
156 dev_err(dev, "failed to assert all resets\n");
158 ret = clk_release_all(priv->clocks, priv->clock_count);
160 dev_err(dev, "failed to disable all clocks\n");
165 static int ohci_usb_remove(struct udevice *dev)
167 struct generic_ohci *priv = dev_get_priv(dev);
170 ret = ohci_deregister(dev);
174 ret = ohci_shutdown_phy(dev);
178 ret = reset_release_all(priv->resets, priv->reset_count);
182 return clk_release_all(priv->clocks, priv->clock_count);
185 static const struct udevice_id ohci_usb_ids[] = {
186 { .compatible = "generic-ohci" },
190 U_BOOT_DRIVER(ohci_generic) = {
191 .name = "ohci_generic",
193 .of_match = ohci_usb_ids,
194 .probe = ohci_usb_probe,
195 .remove = ohci_usb_remove,
196 .ops = &ohci_usb_ops,
197 .priv_auto_alloc_size = sizeof(struct generic_ohci),
198 .flags = DM_FLAG_ALLOC_PRIV_DMA,