1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
|
// SPDX-License-Identifier: GPL-2.0+
/*
* Meson GXL and GXM USB2 PHY driver
*
* Copyright (C) 2017 Martin Blumenstingl <martin.blumenstingl@googlemail.com>
* Copyright (C) 2018 BayLibre, SAS
* Author: Neil Armstrong <narmstron@baylibre.com>
*/
#include <common.h>
#include <malloc.h>
#include <asm/io.h>
#include <bitfield.h>
#include <dm.h>
#include <errno.h>
#include <generic-phy.h>
#include <regmap.h>
#include <power/regulator.h>
#include <clk.h>
#include <linux/usb/otg.h>
#include <asm/arch/usb-gx.h>
#include <linux/bitops.h>
#include <linux/compat.h>
/* bits [31:27] are read-only */
#define U2P_R0 0x0
#define U2P_R0_BYPASS_SEL BIT(0)
#define U2P_R0_BYPASS_DM_EN BIT(1)
#define U2P_R0_BYPASS_DP_EN BIT(2)
#define U2P_R0_TXBITSTUFF_ENH BIT(3)
#define U2P_R0_TXBITSTUFF_EN BIT(4)
#define U2P_R0_DM_PULLDOWN BIT(5)
#define U2P_R0_DP_PULLDOWN BIT(6)
#define U2P_R0_DP_VBUS_VLD_EXT_SEL BIT(7)
#define U2P_R0_DP_VBUS_VLD_EXT BIT(8)
#define U2P_R0_ADP_PRB_EN BIT(9)
#define U2P_R0_ADP_DISCHARGE BIT(10)
#define U2P_R0_ADP_CHARGE BIT(11)
#define U2P_R0_DRV_VBUS BIT(12)
#define U2P_R0_ID_PULLUP BIT(13)
#define U2P_R0_LOOPBACK_EN_B BIT(14)
#define U2P_R0_OTG_DISABLE BIT(15)
#define U2P_R0_COMMON_ONN BIT(16)
#define U2P_R0_FSEL_MASK GENMASK(19, 17)
#define U2P_R0_REF_CLK_SEL_MASK GENMASK(21, 20)
#define U2P_R0_POWER_ON_RESET BIT(22)
#define U2P_R0_V_ATE_TEST_EN_B_MASK GENMASK(24, 23)
#define U2P_R0_ID_SET_ID_DQ BIT(25)
#define U2P_R0_ATE_RESET BIT(26)
#define U2P_R0_FSV_MINUS BIT(27)
#define U2P_R0_FSV_PLUS BIT(28)
#define U2P_R0_BYPASS_DM_DATA BIT(29)
#define U2P_R0_BYPASS_DP_DATA BIT(30)
#define U2P_R1 0x4
#define U2P_R1_BURN_IN_TEST BIT(0)
#define U2P_R1_ACA_ENABLE BIT(1)
#define U2P_R1_DCD_ENABLE BIT(2)
#define U2P_R1_VDAT_SRC_EN_B BIT(3)
#define U2P_R1_VDAT_DET_EN_B BIT(4)
#define U2P_R1_CHARGES_SEL BIT(5)
#define U2P_R1_TX_PREEMP_PULSE_TUNE BIT(6)
#define U2P_R1_TX_PREEMP_AMP_TUNE_MASK GENMASK(8, 7)
#define U2P_R1_TX_RES_TUNE_MASK GENMASK(10, 9)
#define U2P_R1_TX_RISE_TUNE_MASK GENMASK(12, 11)
#define U2P_R1_TX_VREF_TUNE_MASK GENMASK(16, 13)
#define U2P_R1_TX_FSLS_TUNE_MASK GENMASK(20, 17)
#define U2P_R1_TX_HSXV_TUNE_MASK GENMASK(22, 21)
#define U2P_R1_OTG_TUNE_MASK GENMASK(25, 23)
#define U2P_R1_SQRX_TUNE_MASK GENMASK(28, 26)
#define U2P_R1_COMP_DIS_TUNE_MASK GENMASK(31, 29)
/* bits [31:14] are read-only */
#define U2P_R2 0x8
#define U2P_R2_TESTDATA_IN_MASK GENMASK(7, 0)
#define U2P_R2_TESTADDR_MASK GENMASK(11, 8)
#define U2P_R2_TESTDATA_OUT_SEL BIT(12)
#define U2P_R2_TESTCLK BIT(13)
#define U2P_R2_TESTDATA_OUT_MASK GENMASK(17, 14)
#define U2P_R2_ACA_PIN_RANGE_C BIT(18)
#define U2P_R2_ACA_PIN_RANGE_B BIT(19)
#define U2P_R2_ACA_PIN_RANGE_A BIT(20)
#define U2P_R2_ACA_PIN_GND BIT(21)
#define U2P_R2_ACA_PIN_FLOAT BIT(22)
#define U2P_R2_CHARGE_DETECT BIT(23)
#define U2P_R2_DEVICE_SESSION_VALID BIT(24)
#define U2P_R2_ADP_PROBE BIT(25)
#define U2P_R2_ADP_SENSE BIT(26)
#define U2P_R2_SESSION_END BIT(27)
#define U2P_R2_VBUS_VALID BIT(28)
#define U2P_R2_B_VALID BIT(29)
#define U2P_R2_A_VALID BIT(30)
#define U2P_R2_ID_DIG BIT(31)
#define U2P_R3 0xc
#define RESET_COMPLETE_TIME 500
struct phy_meson_gxl_usb2_priv {
struct regmap *regmap;
#if CONFIG_IS_ENABLED(DM_REGULATOR)
struct udevice *phy_supply;
#endif
#if CONFIG_IS_ENABLED(CLK)
struct clk clk;
#endif
};
static void phy_meson_gxl_usb2_reset(struct phy_meson_gxl_usb2_priv *priv)
{
uint val;
regmap_read(priv->regmap, U2P_R0, &val);
/* reset the PHY and wait until settings are stabilized */
val |= U2P_R0_POWER_ON_RESET;
regmap_write(priv->regmap, U2P_R0, val);
udelay(RESET_COMPLETE_TIME);
val &= ~U2P_R0_POWER_ON_RESET;
regmap_write(priv->regmap, U2P_R0, val);
udelay(RESET_COMPLETE_TIME);
}
void phy_meson_gxl_usb2_set_mode(struct phy *phy, enum usb_dr_mode mode)
{
struct udevice *dev = phy->dev;
struct phy_meson_gxl_usb2_priv *priv = dev_get_priv(dev);
uint val;
regmap_read(priv->regmap, U2P_R0, &val);
switch (mode) {
case USB_DR_MODE_UNKNOWN:
case USB_DR_MODE_HOST:
case USB_DR_MODE_OTG:
val |= U2P_R0_DM_PULLDOWN;
val |= U2P_R0_DP_PULLDOWN;
val &= ~U2P_R0_ID_PULLUP;
break;
case USB_DR_MODE_PERIPHERAL:
val &= ~U2P_R0_DM_PULLDOWN;
val &= ~U2P_R0_DP_PULLDOWN;
val |= U2P_R0_ID_PULLUP;
break;
}
regmap_write(priv->regmap, U2P_R0, val);
phy_meson_gxl_usb2_reset(priv);
}
static int phy_meson_gxl_usb2_power_on(struct phy *phy)
{
struct udevice *dev = phy->dev;
struct phy_meson_gxl_usb2_priv *priv = dev_get_priv(dev);
uint val;
regmap_read(priv->regmap, U2P_R0, &val);
/* power on the PHY by taking it out of reset mode */
val &= ~U2P_R0_POWER_ON_RESET;
regmap_write(priv->regmap, U2P_R0, val);
phy_meson_gxl_usb2_set_mode(phy, USB_DR_MODE_HOST);
#if CONFIG_IS_ENABLED(DM_REGULATOR)
if (priv->phy_supply) {
int ret = regulator_set_enable(priv->phy_supply, true);
if (ret)
return ret;
}
#endif
return 0;
}
static int phy_meson_gxl_usb2_power_off(struct phy *phy)
{
struct udevice *dev = phy->dev;
struct phy_meson_gxl_usb2_priv *priv = dev_get_priv(dev);
uint val;
regmap_read(priv->regmap, U2P_R0, &val);
/* power off the PHY by putting it into reset mode */
val |= U2P_R0_POWER_ON_RESET;
regmap_write(priv->regmap, U2P_R0, val);
#if CONFIG_IS_ENABLED(DM_REGULATOR)
if (priv->phy_supply) {
int ret = regulator_set_enable(priv->phy_supply, false);
if (ret) {
pr_err("Error disabling PHY supply\n");
return ret;
}
}
#endif
return 0;
}
struct phy_ops meson_gxl_usb2_phy_ops = {
.power_on = phy_meson_gxl_usb2_power_on,
.power_off = phy_meson_gxl_usb2_power_off,
};
int meson_gxl_usb2_phy_probe(struct udevice *dev)
{
struct phy_meson_gxl_usb2_priv *priv = dev_get_priv(dev);
int ret;
ret = regmap_init_mem(dev_ofnode(dev), &priv->regmap);
if (ret)
return ret;
#if CONFIG_IS_ENABLED(CLK)
ret = clk_get_by_index(dev, 0, &priv->clk);
if (ret < 0)
return ret;
ret = clk_enable(&priv->clk);
if (ret && ret != -ENOSYS && ret != -ENOTSUPP) {
pr_err("failed to enable PHY clock\n");
clk_free(&priv->clk);
return ret;
}
#endif
#if CONFIG_IS_ENABLED(DM_REGULATOR)
ret = device_get_supply_regulator(dev, "phy-supply", &priv->phy_supply);
if (ret && ret != -ENOENT) {
pr_err("Failed to get PHY regulator\n");
return ret;
}
#endif
return 0;
}
static const struct udevice_id meson_gxl_usb2_phy_ids[] = {
{ .compatible = "amlogic,meson-gxl-usb2-phy" },
{ }
};
U_BOOT_DRIVER(meson_gxl_usb2_phy) = {
.name = "meson_gxl_usb2_phy",
.id = UCLASS_PHY,
.of_match = meson_gxl_usb2_phy_ids,
.probe = meson_gxl_usb2_phy_probe,
.ops = &meson_gxl_usb2_phy_ops,
.priv_auto_alloc_size = sizeof(struct phy_meson_gxl_usb2_priv),
};
|
