1 // SPDX-License-Identifier: GPL-2.0
3 * Meson G12A MIPI DSI Analog PHY
5 * Copyright (C) 2018 Amlogic, Inc. All rights reserved
6 * Copyright (C) 2022 BayLibre, SAS
7 * Author: Neil Armstrong <narmstrong@baylibre.com>
9 #include <linux/bitfield.h>
10 #include <linux/bitops.h>
11 #include <linux/module.h>
12 #include <linux/phy/phy.h>
13 #include <linux/regmap.h>
14 #include <linux/delay.h>
15 #include <linux/mfd/syscon.h>
16 #include <linux/platform_device.h>
17 #include <dt-bindings/phy/phy.h>
19 #define HHI_MIPI_CNTL0 0x00
20 #define HHI_MIPI_CNTL0_DIF_REF_CTL1 GENMASK(31, 16)
21 #define HHI_MIPI_CNTL0_DIF_REF_CTL0 GENMASK(15, 0)
23 #define HHI_MIPI_CNTL1 0x04
24 #define HHI_MIPI_CNTL1_BANDGAP BIT(16)
25 #define HHI_MIPI_CNTL2_DIF_REF_CTL2 GENMASK(15, 0)
27 #define HHI_MIPI_CNTL2 0x08
28 #define HHI_MIPI_CNTL2_DIF_TX_CTL1 GENMASK(31, 16)
29 #define HHI_MIPI_CNTL2_CH_EN GENMASK(15, 11)
30 #define HHI_MIPI_CNTL2_DIF_TX_CTL0 GENMASK(10, 0)
32 #define DSI_LANE_0 BIT(4)
33 #define DSI_LANE_1 BIT(3)
34 #define DSI_LANE_CLK BIT(2)
35 #define DSI_LANE_2 BIT(1)
36 #define DSI_LANE_3 BIT(0)
38 struct phy_g12a_mipi_dphy_analog_priv {
40 struct regmap *regmap;
41 struct phy_configure_opts_mipi_dphy config;
44 static int phy_g12a_mipi_dphy_analog_configure(struct phy *phy,
45 union phy_configure_opts *opts)
47 struct phy_g12a_mipi_dphy_analog_priv *priv = phy_get_drvdata(phy);
50 ret = phy_mipi_dphy_config_validate(&opts->mipi_dphy);
54 memcpy(&priv->config, opts, sizeof(priv->config));
59 static int phy_g12a_mipi_dphy_analog_power_on(struct phy *phy)
61 struct phy_g12a_mipi_dphy_analog_priv *priv = phy_get_drvdata(phy);
64 regmap_write(priv->regmap, HHI_MIPI_CNTL0,
65 FIELD_PREP(HHI_MIPI_CNTL0_DIF_REF_CTL0, 0x8) |
66 FIELD_PREP(HHI_MIPI_CNTL0_DIF_REF_CTL1, 0xa487));
68 regmap_write(priv->regmap, HHI_MIPI_CNTL1,
69 FIELD_PREP(HHI_MIPI_CNTL2_DIF_REF_CTL2, 0x2e) |
70 HHI_MIPI_CNTL1_BANDGAP);
72 regmap_write(priv->regmap, HHI_MIPI_CNTL2,
73 FIELD_PREP(HHI_MIPI_CNTL2_DIF_TX_CTL0, 0x459) |
74 FIELD_PREP(HHI_MIPI_CNTL2_DIF_TX_CTL1, 0x2680));
77 switch (priv->config.lanes) {
94 regmap_update_bits(priv->regmap, HHI_MIPI_CNTL2,
96 FIELD_PREP(HHI_MIPI_CNTL2_CH_EN, reg));
101 static int phy_g12a_mipi_dphy_analog_power_off(struct phy *phy)
103 struct phy_g12a_mipi_dphy_analog_priv *priv = phy_get_drvdata(phy);
105 regmap_write(priv->regmap, HHI_MIPI_CNTL0, 0);
106 regmap_write(priv->regmap, HHI_MIPI_CNTL1, 0);
107 regmap_write(priv->regmap, HHI_MIPI_CNTL2, 0);
112 static const struct phy_ops phy_g12a_mipi_dphy_analog_ops = {
113 .configure = phy_g12a_mipi_dphy_analog_configure,
114 .power_on = phy_g12a_mipi_dphy_analog_power_on,
115 .power_off = phy_g12a_mipi_dphy_analog_power_off,
116 .owner = THIS_MODULE,
119 static int phy_g12a_mipi_dphy_analog_probe(struct platform_device *pdev)
121 struct phy_provider *phy;
122 struct device *dev = &pdev->dev;
123 struct phy_g12a_mipi_dphy_analog_priv *priv;
124 struct device_node *np = dev->of_node, *parent_np;
127 priv = devm_kmalloc(dev, sizeof(*priv), GFP_KERNEL);
131 /* Get the hhi system controller node */
132 parent_np = of_get_parent(np);
133 map = syscon_node_to_regmap(parent_np);
134 of_node_put(parent_np);
136 return dev_err_probe(dev, PTR_ERR(map), "failed to get HHI regmap\n");
140 priv->phy = devm_phy_create(dev, np, &phy_g12a_mipi_dphy_analog_ops);
141 if (IS_ERR(priv->phy))
142 return dev_err_probe(dev, PTR_ERR(priv->phy), "failed to create PHY\n");
144 phy_set_drvdata(priv->phy, priv);
145 dev_set_drvdata(dev, priv);
147 phy = devm_of_phy_provider_register(dev, of_phy_simple_xlate);
149 return PTR_ERR_OR_ZERO(phy);
152 static const struct of_device_id phy_g12a_mipi_dphy_analog_of_match[] = {
154 .compatible = "amlogic,g12a-mipi-dphy-analog",
158 MODULE_DEVICE_TABLE(of, phy_g12a_mipi_dphy_analog_of_match);
160 static struct platform_driver phy_g12a_mipi_dphy_analog_driver = {
161 .probe = phy_g12a_mipi_dphy_analog_probe,
163 .name = "phy-meson-g12a-mipi-dphy-analog",
164 .of_match_table = phy_g12a_mipi_dphy_analog_of_match,
167 module_platform_driver(phy_g12a_mipi_dphy_analog_driver);
169 MODULE_AUTHOR("Neil Armstrong <narmstrong@baylibre.com>");
170 MODULE_DESCRIPTION("Meson G12A MIPI Analog D-PHY driver");
171 MODULE_LICENSE("GPL v2");