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6#include <common.h>
7#include <clk.h>
8#include <dm.h>
9#include <dm/ofnode.h>
10#include <generic-phy.h>
11#include <reset.h>
12#include "ohci.h"
13
14#if !defined(CONFIG_USB_OHCI_NEW)
15# error "Generic OHCI driver requires CONFIG_USB_OHCI_NEW"
16#endif
17
18struct generic_ohci {
19 ohci_t ohci;
20 struct clk *clocks;
21 struct reset_ctl *resets;
22 struct phy phy;
23 int clock_count;
24 int reset_count;
25};
26
27static int ohci_setup_phy(struct udevice *dev, int index)
28{
29 struct generic_ohci *priv = dev_get_priv(dev);
30 int ret;
31
32 ret = generic_phy_get_by_index(dev, index, &priv->phy);
33 if (ret) {
34 if (ret != -ENOENT) {
35 dev_err(dev, "failed to get usb phy\n");
36 return ret;
37 }
38 } else {
39 ret = generic_phy_init(&priv->phy);
40 if (ret) {
41 dev_err(dev, "failed to init usb phy\n");
42 return ret;
43 }
44
45 ret = generic_phy_power_on(&priv->phy);
46 if (ret) {
47 dev_err(dev, "failed to power on usb phy\n");
48 return generic_phy_exit(&priv->phy);
49 }
50 }
51
52 return 0;
53}
54
55static int ohci_shutdown_phy(struct udevice *dev)
56{
57 struct generic_ohci *priv = dev_get_priv(dev);
58 int ret = 0;
59
60 if (generic_phy_valid(&priv->phy)) {
61 ret = generic_phy_power_off(&priv->phy);
62 if (ret) {
63 dev_err(dev, "failed to power off usb phy\n");
64 return ret;
65 }
66
67 ret = generic_phy_exit(&priv->phy);
68 if (ret) {
69 dev_err(dev, "failed to power off usb phy\n");
70 return ret;
71 }
72 }
73
74 return 0;
75}
76
77static int ohci_usb_probe(struct udevice *dev)
78{
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;
82
83 err = 0;
84 priv->clock_count = 0;
85 clock_nb = dev_count_phandle_with_args(dev, "clocks", "#clock-cells");
86 if (clock_nb > 0) {
87 priv->clocks = devm_kcalloc(dev, clock_nb, sizeof(struct clk),
88 GFP_KERNEL);
89 if (!priv->clocks)
90 return -ENOMEM;
91
92 for (i = 0; i < clock_nb; i++) {
93 err = clk_get_by_index(dev, i, &priv->clocks[i]);
94 if (err < 0)
95 break;
96
97 err = clk_enable(&priv->clocks[i]);
98 if (err && err != -ENOSYS) {
99 dev_err(dev, "failed to enable clock %d\n", i);
100 clk_free(&priv->clocks[i]);
101 goto clk_err;
102 }
103 priv->clock_count++;
104 }
105 } else if (clock_nb != -ENOENT) {
106 dev_err(dev, "failed to get clock phandle(%d)\n", clock_nb);
107 return clock_nb;
108 }
109
110 priv->reset_count = 0;
111 reset_nb = dev_count_phandle_with_args(dev, "resets", "#reset-cells");
112 if (reset_nb > 0) {
113 priv->resets = devm_kcalloc(dev, reset_nb,
114 sizeof(struct reset_ctl),
115 GFP_KERNEL);
116 if (!priv->resets)
117 return -ENOMEM;
118
119 for (i = 0; i < reset_nb; i++) {
120 err = reset_get_by_index(dev, i, &priv->resets[i]);
121 if (err < 0)
122 break;
123
124 err = reset_deassert(&priv->resets[i]);
125 if (err) {
126 dev_err(dev, "failed to deassert reset %d\n", i);
127 reset_free(&priv->resets[i]);
128 goto reset_err;
129 }
130 priv->reset_count++;
131 }
132 } else if (reset_nb != -ENOENT) {
133 dev_err(dev, "failed to get reset phandle(%d)\n", reset_nb);
134 goto clk_err;
135 }
136
137 err = ohci_setup_phy(dev, 0);
138 if (err)
139 goto reset_err;
140
141 err = ohci_register(dev, regs);
142 if (err)
143 goto phy_err;
144
145 return 0;
146
147phy_err:
148 ret = ohci_shutdown_phy(dev);
149 if (ret)
150 dev_err(dev, "failed to shutdown usb phy\n");
151
152reset_err:
153 ret = reset_release_all(priv->resets, priv->reset_count);
154 if (ret)
155 dev_err(dev, "failed to assert all resets\n");
156clk_err:
157 ret = clk_release_all(priv->clocks, priv->clock_count);
158 if (ret)
159 dev_err(dev, "failed to disable all clocks\n");
160
161 return err;
162}
163
164static int ohci_usb_remove(struct udevice *dev)
165{
166 struct generic_ohci *priv = dev_get_priv(dev);
167 int ret;
168
169 ret = ohci_deregister(dev);
170 if (ret)
171 return ret;
172
173 ret = ohci_shutdown_phy(dev);
174 if (ret)
175 return ret;
176
177 ret = reset_release_all(priv->resets, priv->reset_count);
178 if (ret)
179 return ret;
180
181 return clk_release_all(priv->clocks, priv->clock_count);
182}
183
184static const struct udevice_id ohci_usb_ids[] = {
185 { .compatible = "generic-ohci" },
186 { }
187};
188
189U_BOOT_DRIVER(ohci_generic) = {
190 .name = "ohci_generic",
191 .id = UCLASS_USB,
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,
198};
199
