1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * Copyright (c) 2018 MediaTek Inc. 4 * Author: Jie Qiu <jie.qiu@mediatek.com> 5 */ 6 7 #include "phy-mtk-hdmi.h" 8 9 static int mtk_hdmi_phy_power_on(struct phy *phy); 10 static int mtk_hdmi_phy_power_off(struct phy *phy); 11 12 static const struct phy_ops mtk_hdmi_phy_dev_ops = { 13 .power_on = mtk_hdmi_phy_power_on, 14 .power_off = mtk_hdmi_phy_power_off, 15 .owner = THIS_MODULE, 16 }; 17 18 void mtk_hdmi_phy_clear_bits(struct mtk_hdmi_phy *hdmi_phy, u32 offset, 19 u32 bits) 20 { 21 void __iomem *reg = hdmi_phy->regs + offset; 22 u32 tmp; 23 24 tmp = readl(reg); 25 tmp &= ~bits; 26 writel(tmp, reg); 27 } 28 29 void mtk_hdmi_phy_set_bits(struct mtk_hdmi_phy *hdmi_phy, u32 offset, 30 u32 bits) 31 { 32 void __iomem *reg = hdmi_phy->regs + offset; 33 u32 tmp; 34 35 tmp = readl(reg); 36 tmp |= bits; 37 writel(tmp, reg); 38 } 39 40 void mtk_hdmi_phy_mask(struct mtk_hdmi_phy *hdmi_phy, u32 offset, 41 u32 val, u32 mask) 42 { 43 void __iomem *reg = hdmi_phy->regs + offset; 44 u32 tmp; 45 46 tmp = readl(reg); 47 tmp = (tmp & ~mask) | (val & mask); 48 writel(tmp, reg); 49 } 50 51 inline struct mtk_hdmi_phy *to_mtk_hdmi_phy(struct clk_hw *hw) 52 { 53 return container_of(hw, struct mtk_hdmi_phy, pll_hw); 54 } 55 56 static int mtk_hdmi_phy_power_on(struct phy *phy) 57 { 58 struct mtk_hdmi_phy *hdmi_phy = phy_get_drvdata(phy); 59 int ret; 60 61 ret = clk_prepare_enable(hdmi_phy->pll); 62 if (ret < 0) 63 return ret; 64 65 hdmi_phy->conf->hdmi_phy_enable_tmds(hdmi_phy); 66 return 0; 67 } 68 69 static int mtk_hdmi_phy_power_off(struct phy *phy) 70 { 71 struct mtk_hdmi_phy *hdmi_phy = phy_get_drvdata(phy); 72 73 hdmi_phy->conf->hdmi_phy_disable_tmds(hdmi_phy); 74 clk_disable_unprepare(hdmi_phy->pll); 75 76 return 0; 77 } 78 79 static const struct phy_ops * 80 mtk_hdmi_phy_dev_get_ops(const struct mtk_hdmi_phy *hdmi_phy) 81 { 82 if (hdmi_phy && hdmi_phy->conf && 83 hdmi_phy->conf->hdmi_phy_enable_tmds && 84 hdmi_phy->conf->hdmi_phy_disable_tmds) 85 return &mtk_hdmi_phy_dev_ops; 86 87 if (hdmi_phy) 88 dev_err(hdmi_phy->dev, "Failed to get dev ops of phy\n"); 89 return NULL; 90 } 91 92 static void mtk_hdmi_phy_clk_get_data(struct mtk_hdmi_phy *hdmi_phy, 93 struct clk_init_data *clk_init) 94 { 95 clk_init->flags = hdmi_phy->conf->flags; 96 clk_init->ops = hdmi_phy->conf->hdmi_phy_clk_ops; 97 } 98 99 static int mtk_hdmi_phy_probe(struct platform_device *pdev) 100 { 101 struct device *dev = &pdev->dev; 102 struct mtk_hdmi_phy *hdmi_phy; 103 struct resource *mem; 104 struct clk *ref_clk; 105 const char *ref_clk_name; 106 struct clk_init_data clk_init = { 107 .num_parents = 1, 108 .parent_names = (const char * const *)&ref_clk_name, 109 }; 110 111 struct phy *phy; 112 struct phy_provider *phy_provider; 113 int ret; 114 115 hdmi_phy = devm_kzalloc(dev, sizeof(*hdmi_phy), GFP_KERNEL); 116 if (!hdmi_phy) 117 return -ENOMEM; 118 119 mem = platform_get_resource(pdev, IORESOURCE_MEM, 0); 120 hdmi_phy->regs = devm_ioremap_resource(dev, mem); 121 if (IS_ERR(hdmi_phy->regs)) { 122 ret = PTR_ERR(hdmi_phy->regs); 123 dev_err(dev, "Failed to get memory resource: %d\n", ret); 124 return ret; 125 } 126 127 ref_clk = devm_clk_get(dev, "pll_ref"); 128 if (IS_ERR(ref_clk)) { 129 ret = PTR_ERR(ref_clk); 130 dev_err(&pdev->dev, "Failed to get PLL reference clock: %d\n", 131 ret); 132 return ret; 133 } 134 ref_clk_name = __clk_get_name(ref_clk); 135 136 ret = of_property_read_string(dev->of_node, "clock-output-names", 137 &clk_init.name); 138 if (ret < 0) { 139 dev_err(dev, "Failed to read clock-output-names: %d\n", ret); 140 return ret; 141 } 142 143 hdmi_phy->dev = dev; 144 hdmi_phy->conf = 145 (struct mtk_hdmi_phy_conf *)of_device_get_match_data(dev); 146 mtk_hdmi_phy_clk_get_data(hdmi_phy, &clk_init); 147 hdmi_phy->pll_hw.init = &clk_init; 148 hdmi_phy->pll = devm_clk_register(dev, &hdmi_phy->pll_hw); 149 if (IS_ERR(hdmi_phy->pll)) { 150 ret = PTR_ERR(hdmi_phy->pll); 151 dev_err(dev, "Failed to register PLL: %d\n", ret); 152 return ret; 153 } 154 155 ret = of_property_read_u32(dev->of_node, "mediatek,ibias", 156 &hdmi_phy->ibias); 157 if (ret < 0) { 158 dev_err(&pdev->dev, "Failed to get ibias: %d\n", ret); 159 return ret; 160 } 161 162 ret = of_property_read_u32(dev->of_node, "mediatek,ibias_up", 163 &hdmi_phy->ibias_up); 164 if (ret < 0) { 165 dev_err(&pdev->dev, "Failed to get ibias up: %d\n", ret); 166 return ret; 167 } 168 169 dev_info(dev, "Using default TX DRV impedance: 4.2k/36\n"); 170 hdmi_phy->drv_imp_clk = 0x30; 171 hdmi_phy->drv_imp_d2 = 0x30; 172 hdmi_phy->drv_imp_d1 = 0x30; 173 hdmi_phy->drv_imp_d0 = 0x30; 174 175 phy = devm_phy_create(dev, NULL, mtk_hdmi_phy_dev_get_ops(hdmi_phy)); 176 if (IS_ERR(phy)) { 177 dev_err(dev, "Failed to create HDMI PHY\n"); 178 return PTR_ERR(phy); 179 } 180 phy_set_drvdata(phy, hdmi_phy); 181 182 phy_provider = devm_of_phy_provider_register(dev, of_phy_simple_xlate); 183 if (IS_ERR(phy_provider)) { 184 dev_err(dev, "Failed to register HDMI PHY\n"); 185 return PTR_ERR(phy_provider); 186 } 187 188 if (hdmi_phy->conf->pll_default_off) 189 hdmi_phy->conf->hdmi_phy_disable_tmds(hdmi_phy); 190 191 return of_clk_add_provider(dev->of_node, of_clk_src_simple_get, 192 hdmi_phy->pll); 193 } 194 195 static const struct of_device_id mtk_hdmi_phy_match[] = { 196 { .compatible = "mediatek,mt2701-hdmi-phy", 197 .data = &mtk_hdmi_phy_2701_conf, 198 }, 199 { .compatible = "mediatek,mt8173-hdmi-phy", 200 .data = &mtk_hdmi_phy_8173_conf, 201 }, 202 {}, 203 }; 204 205 static struct platform_driver mtk_hdmi_phy_driver = { 206 .probe = mtk_hdmi_phy_probe, 207 .driver = { 208 .name = "mediatek-hdmi-phy", 209 .of_match_table = mtk_hdmi_phy_match, 210 }, 211 }; 212 module_platform_driver(mtk_hdmi_phy_driver); 213 214 MODULE_DESCRIPTION("MediaTek HDMI PHY Driver"); 215 MODULE_LICENSE("GPL v2"); 216