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10#include <common.h>
11#include <log.h>
12#include <malloc.h>
13#include <asm/io.h>
14#include <bitfield.h>
15#include <dm.h>
16#include <errno.h>
17#include <generic-phy.h>
18#include <regmap.h>
19#include <linux/delay.h>
20#include <power/regulator.h>
21#include <reset.h>
22#include <clk.h>
23
24#include <linux/bitops.h>
25#include <linux/compat.h>
26
27#define PHY_CTRL_R0 0x0
28#define PHY_CTRL_R1 0x4
29#define PHY_CTRL_R2 0x8
30#define PHY_CTRL_R3 0xc
31#define PHY_CTRL_R4 0x10
32#define PHY_CTRL_R5 0x14
33#define PHY_CTRL_R6 0x18
34#define PHY_CTRL_R7 0x1c
35#define PHY_CTRL_R8 0x20
36#define PHY_CTRL_R9 0x24
37#define PHY_CTRL_R10 0x28
38#define PHY_CTRL_R11 0x2c
39#define PHY_CTRL_R12 0x30
40#define PHY_CTRL_R13 0x34
41#define PHY_CTRL_R14 0x38
42#define PHY_CTRL_R15 0x3c
43#define PHY_CTRL_R16 0x40
44#define PHY_CTRL_R17 0x44
45#define PHY_CTRL_R18 0x48
46#define PHY_CTRL_R19 0x4c
47#define PHY_CTRL_R20 0x50
48#define PHY_CTRL_R21 0x54
49#define PHY_CTRL_R22 0x58
50#define PHY_CTRL_R23 0x5c
51
52#define RESET_COMPLETE_TIME 1000
53#define PLL_RESET_COMPLETE_TIME 100
54
55struct phy_meson_g12a_usb2_priv {
56 struct regmap *regmap;
57#if CONFIG_IS_ENABLED(DM_REGULATOR)
58 struct udevice *phy_supply;
59#endif
60#if CONFIG_IS_ENABLED(CLK)
61 struct clk clk;
62#endif
63 struct reset_ctl reset;
64};
65
66
67static int phy_meson_g12a_usb2_power_on(struct phy *phy)
68{
69#if CONFIG_IS_ENABLED(DM_REGULATOR)
70 struct udevice *dev = phy->dev;
71 struct phy_meson_g12a_usb2_priv *priv = dev_get_priv(dev);
72
73 if (priv->phy_supply) {
74 int ret = regulator_set_enable(priv->phy_supply, true);
75 if (ret)
76 return ret;
77 }
78#endif
79
80 return 0;
81}
82
83static int phy_meson_g12a_usb2_power_off(struct phy *phy)
84{
85#if CONFIG_IS_ENABLED(DM_REGULATOR)
86 struct udevice *dev = phy->dev;
87 struct phy_meson_g12a_usb2_priv *priv = dev_get_priv(dev);
88
89 if (priv->phy_supply) {
90 int ret = regulator_set_enable(priv->phy_supply, false);
91 if (ret) {
92 pr_err("Error disabling PHY supply\n");
93 return ret;
94 }
95 }
96#endif
97
98 return 0;
99}
100
101static int phy_meson_g12a_usb2_init(struct phy *phy)
102{
103 struct udevice *dev = phy->dev;
104 struct phy_meson_g12a_usb2_priv *priv = dev_get_priv(dev);
105 int ret;
106
107 ret = reset_assert(&priv->reset);
108 udelay(1);
109 ret |= reset_deassert(&priv->reset);
110 if (ret)
111 return ret;
112
113 udelay(RESET_COMPLETE_TIME);
114
115
116 regmap_update_bits(priv->regmap, PHY_CTRL_R21, BIT(2), 0);
117
118
119 regmap_write(priv->regmap, PHY_CTRL_R16, 0x39400414);
120 regmap_write(priv->regmap, PHY_CTRL_R17, 0x927e0000);
121 regmap_write(priv->regmap, PHY_CTRL_R18, 0xac5f49e5);
122
123 udelay(PLL_RESET_COMPLETE_TIME);
124
125
126 regmap_write(priv->regmap, PHY_CTRL_R16, 0x19400414);
127
128
129 regmap_write(priv->regmap, PHY_CTRL_R20, 0xfe18);
130 regmap_write(priv->regmap, PHY_CTRL_R4, 0x8000fff);
131
132
133 regmap_write(priv->regmap, PHY_CTRL_R3, 0x34);
134
135
136 regmap_write(priv->regmap, PHY_CTRL_R14, 0);
137 regmap_write(priv->regmap, PHY_CTRL_R13, 0x78000);
138
139 return 0;
140}
141
142static int phy_meson_g12a_usb2_exit(struct phy *phy)
143{
144 struct udevice *dev = phy->dev;
145 struct phy_meson_g12a_usb2_priv *priv = dev_get_priv(dev);
146 int ret;
147
148 ret = reset_assert(&priv->reset);
149 if (ret)
150 return ret;
151
152 return 0;
153}
154
155struct phy_ops meson_g12a_usb2_phy_ops = {
156 .init = phy_meson_g12a_usb2_init,
157 .exit = phy_meson_g12a_usb2_exit,
158 .power_on = phy_meson_g12a_usb2_power_on,
159 .power_off = phy_meson_g12a_usb2_power_off,
160};
161
162int meson_g12a_usb2_phy_probe(struct udevice *dev)
163{
164 struct phy_meson_g12a_usb2_priv *priv = dev_get_priv(dev);
165 int ret;
166
167 ret = regmap_init_mem(dev_ofnode(dev), &priv->regmap);
168 if (ret)
169 return ret;
170
171 ret = reset_get_by_index(dev, 0, &priv->reset);
172 if (ret == -ENOTSUPP)
173 return 0;
174 else if (ret)
175 return ret;
176
177 ret = reset_deassert(&priv->reset);
178 if (ret) {
179 reset_release_all(&priv->reset, 1);
180 return ret;
181 }
182
183#if CONFIG_IS_ENABLED(CLK)
184 ret = clk_get_by_index(dev, 0, &priv->clk);
185 if (ret < 0)
186 return ret;
187
188 ret = clk_enable(&priv->clk);
189 if (ret && ret != -ENOSYS && ret != -ENOTSUPP) {
190 pr_err("failed to enable PHY clock\n");
191 clk_free(&priv->clk);
192 return ret;
193 }
194#endif
195
196#if CONFIG_IS_ENABLED(DM_REGULATOR)
197 ret = device_get_supply_regulator(dev, "phy-supply", &priv->phy_supply);
198 if (ret && ret != -ENOENT) {
199 pr_err("Failed to get PHY regulator\n");
200 return ret;
201 }
202#endif
203
204 return 0;
205}
206
207static const struct udevice_id meson_g12a_usb2_phy_ids[] = {
208 { .compatible = "amlogic,g12a-usb2-phy" },
209 { }
210};
211
212U_BOOT_DRIVER(meson_g12a_usb2_phy) = {
213 .name = "meson_g12a_usb2_phy",
214 .id = UCLASS_PHY,
215 .of_match = meson_g12a_usb2_phy_ids,
216 .probe = meson_g12a_usb2_phy_probe,
217 .ops = &meson_g12a_usb2_phy_ops,
218 .priv_auto_alloc_size = sizeof(struct phy_meson_g12a_usb2_priv),
219};
220
