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Alexey Brodkin83fd3122015-12-14 17:18:50 +03001/*
2 * Copyright (C) 2015 Alexey Brodkin <abrodkin@synopsys.com>
3 *
4 * SPDX-License-Identifier: GPL-2.0+
5 */
6
7#include <common.h>
Patrice Chotard37a197a2017-07-18 11:57:12 +02008#include <clk.h>
Alexey Brodkin83fd3122015-12-14 17:18:50 +03009#include <dm.h>
Patrice Chotard37a197a2017-07-18 11:57:12 +020010#include <dm/ofnode.h>
Patrice Chotardc6e19d32017-07-18 11:57:14 +020011#include <generic-phy.h>
Patrice Chotard170229e2017-07-18 11:57:13 +020012#include <reset.h>
Alexey Brodkin83fd3122015-12-14 17:18:50 +030013#include "ohci.h"
14
15#if !defined(CONFIG_USB_OHCI_NEW)
16# error "Generic OHCI driver requires CONFIG_USB_OHCI_NEW"
17#endif
18
19struct generic_ohci {
20 ohci_t ohci;
Patrice Chotard37a197a2017-07-18 11:57:12 +020021 struct clk *clocks; /* clock list */
Patrice Chotard170229e2017-07-18 11:57:13 +020022 struct reset_ctl *resets; /* reset list */
Patrice Chotardc6e19d32017-07-18 11:57:14 +020023 struct phy phy;
Patrice Chotard37a197a2017-07-18 11:57:12 +020024 int clock_count; /* number of clock in clock list */
Patrice Chotard170229e2017-07-18 11:57:13 +020025 int reset_count; /* number of reset in reset list */
Alexey Brodkin83fd3122015-12-14 17:18:50 +030026};
27
28static int ohci_usb_probe(struct udevice *dev)
29{
Simon Glassba1dea42017-05-17 17:18:05 -060030 struct ohci_regs *regs = (struct ohci_regs *)devfdt_get_addr(dev);
Patrice Chotard37a197a2017-07-18 11:57:12 +020031 struct generic_ohci *priv = dev_get_priv(dev);
Patrice Chotard170229e2017-07-18 11:57:13 +020032 int i, err, ret, clock_nb, reset_nb;
Alexey Brodkin83fd3122015-12-14 17:18:50 +030033
Patrice Chotard37a197a2017-07-18 11:57:12 +020034 err = 0;
35 priv->clock_count = 0;
36 clock_nb = dev_count_phandle_with_args(dev, "clocks", "#clock-cells");
37 if (clock_nb > 0) {
38 priv->clocks = devm_kcalloc(dev, clock_nb, sizeof(struct clk),
39 GFP_KERNEL);
40 if (!priv->clocks)
41 return -ENOMEM;
42
43 for (i = 0; i < clock_nb; i++) {
44 err = clk_get_by_index(dev, i, &priv->clocks[i]);
45 if (err < 0)
46 break;
47
48 err = clk_enable(&priv->clocks[i]);
49 if (err) {
Masahiro Yamada81e10422017-09-16 14:10:41 +090050 pr_err("failed to enable clock %d\n", i);
Patrice Chotard37a197a2017-07-18 11:57:12 +020051 clk_free(&priv->clocks[i]);
52 goto clk_err;
53 }
54 priv->clock_count++;
55 }
56 } else if (clock_nb != -ENOENT) {
Masahiro Yamada81e10422017-09-16 14:10:41 +090057 pr_err("failed to get clock phandle(%d)\n", clock_nb);
Patrice Chotard37a197a2017-07-18 11:57:12 +020058 return clock_nb;
59 }
60
Patrice Chotard170229e2017-07-18 11:57:13 +020061 priv->reset_count = 0;
62 reset_nb = dev_count_phandle_with_args(dev, "resets", "#reset-cells");
63 if (reset_nb > 0) {
64 priv->resets = devm_kcalloc(dev, reset_nb,
65 sizeof(struct reset_ctl),
66 GFP_KERNEL);
67 if (!priv->resets)
68 return -ENOMEM;
69
70 for (i = 0; i < reset_nb; i++) {
71 err = reset_get_by_index(dev, i, &priv->resets[i]);
72 if (err < 0)
73 break;
74
75 err = reset_deassert(&priv->resets[i]);
76 if (err) {
Masahiro Yamada81e10422017-09-16 14:10:41 +090077 pr_err("failed to deassert reset %d\n", i);
Patrice Chotard170229e2017-07-18 11:57:13 +020078 reset_free(&priv->resets[i]);
79 goto reset_err;
80 }
81 priv->reset_count++;
82 }
83 } else if (reset_nb != -ENOENT) {
Masahiro Yamada81e10422017-09-16 14:10:41 +090084 pr_err("failed to get reset phandle(%d)\n", reset_nb);
Patrice Chotard170229e2017-07-18 11:57:13 +020085 goto clk_err;
86 }
87
Patrice Chotardc6e19d32017-07-18 11:57:14 +020088 err = generic_phy_get_by_index(dev, 0, &priv->phy);
89 if (err) {
90 if (err != -ENOENT) {
Masahiro Yamada81e10422017-09-16 14:10:41 +090091 pr_err("failed to get usb phy\n");
Patrice Chotardc6e19d32017-07-18 11:57:14 +020092 goto reset_err;
93 }
Patrice Chotardeabebc02017-07-24 17:07:05 +020094 } else {
Patrice Chotardc6e19d32017-07-18 11:57:14 +020095
Patrice Chotardeabebc02017-07-24 17:07:05 +020096 err = generic_phy_init(&priv->phy);
97 if (err) {
Masahiro Yamada81e10422017-09-16 14:10:41 +090098 pr_err("failed to init usb phy\n");
Patrice Chotardeabebc02017-07-24 17:07:05 +020099 goto reset_err;
100 }
Patrice Chotardc6e19d32017-07-18 11:57:14 +0200101 }
102
Patrice Chotard37a197a2017-07-18 11:57:12 +0200103 err = ohci_register(dev, regs);
104 if (err)
Patrice Chotardc6e19d32017-07-18 11:57:14 +0200105 goto phy_err;
Patrice Chotard37a197a2017-07-18 11:57:12 +0200106
107 return 0;
108
Patrice Chotardc6e19d32017-07-18 11:57:14 +0200109phy_err:
110 if (generic_phy_valid(&priv->phy)) {
111 ret = generic_phy_exit(&priv->phy);
112 if (ret)
Masahiro Yamada81e10422017-09-16 14:10:41 +0900113 pr_err("failed to release phy\n");
Patrice Chotardc6e19d32017-07-18 11:57:14 +0200114 }
115
Patrice Chotard170229e2017-07-18 11:57:13 +0200116reset_err:
117 ret = reset_release_all(priv->resets, priv->reset_count);
118 if (ret)
Masahiro Yamada81e10422017-09-16 14:10:41 +0900119 pr_err("failed to assert all resets\n");
Patrice Chotard37a197a2017-07-18 11:57:12 +0200120clk_err:
121 ret = clk_release_all(priv->clocks, priv->clock_count);
122 if (ret)
Masahiro Yamada81e10422017-09-16 14:10:41 +0900123 pr_err("failed to disable all clocks\n");
Patrice Chotard37a197a2017-07-18 11:57:12 +0200124
125 return err;
Alexey Brodkin83fd3122015-12-14 17:18:50 +0300126}
127
128static int ohci_usb_remove(struct udevice *dev)
129{
Patrice Chotard37a197a2017-07-18 11:57:12 +0200130 struct generic_ohci *priv = dev_get_priv(dev);
131 int ret;
132
133 ret = ohci_deregister(dev);
134 if (ret)
135 return ret;
136
Patrice Chotardc6e19d32017-07-18 11:57:14 +0200137 if (generic_phy_valid(&priv->phy)) {
138 ret = generic_phy_exit(&priv->phy);
139 if (ret)
140 return ret;
141 }
142
Patrice Chotard170229e2017-07-18 11:57:13 +0200143 ret = reset_release_all(priv->resets, priv->reset_count);
144 if (ret)
145 return ret;
146
Patrice Chotard37a197a2017-07-18 11:57:12 +0200147 return clk_release_all(priv->clocks, priv->clock_count);
Alexey Brodkin83fd3122015-12-14 17:18:50 +0300148}
149
150static const struct udevice_id ohci_usb_ids[] = {
151 { .compatible = "generic-ohci" },
152 { }
153};
154
155U_BOOT_DRIVER(ohci_generic) = {
156 .name = "ohci_generic",
157 .id = UCLASS_USB,
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,
164};