1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Copyright (c) 2014 MediaTek Inc. 4 * Author: James Liao <jamesjj.liao@mediatek.com> 5 */ 6 7 #include <linux/device.h> 8 #include <linux/io.h> 9 #include <linux/of_device.h> 10 #include <linux/platform_device.h> 11 #include <linux/soc/mediatek/mtk-mmsys.h> 12 13 #include "mtk-mmsys.h" 14 15 static const struct mtk_mmsys_driver_data mt2701_mmsys_driver_data = { 16 .clk_driver = "clk-mt2701-mm", 17 .routes = mmsys_default_routing_table, 18 .num_routes = ARRAY_SIZE(mmsys_default_routing_table), 19 }; 20 21 static const struct mtk_mmsys_driver_data mt2712_mmsys_driver_data = { 22 .clk_driver = "clk-mt2712-mm", 23 .routes = mmsys_default_routing_table, 24 .num_routes = ARRAY_SIZE(mmsys_default_routing_table), 25 }; 26 27 static const struct mtk_mmsys_driver_data mt6779_mmsys_driver_data = { 28 .clk_driver = "clk-mt6779-mm", 29 }; 30 31 static const struct mtk_mmsys_driver_data mt6797_mmsys_driver_data = { 32 .clk_driver = "clk-mt6797-mm", 33 }; 34 35 static const struct mtk_mmsys_driver_data mt8173_mmsys_driver_data = { 36 .clk_driver = "clk-mt8173-mm", 37 .routes = mmsys_default_routing_table, 38 .num_routes = ARRAY_SIZE(mmsys_default_routing_table), 39 }; 40 41 static const struct mtk_mmsys_driver_data mt8183_mmsys_driver_data = { 42 .clk_driver = "clk-mt8183-mm", 43 }; 44 45 struct mtk_mmsys { 46 void __iomem *regs; 47 const struct mtk_mmsys_driver_data *data; 48 }; 49 50 void mtk_mmsys_ddp_connect(struct device *dev, 51 enum mtk_ddp_comp_id cur, 52 enum mtk_ddp_comp_id next) 53 { 54 struct mtk_mmsys *mmsys = dev_get_drvdata(dev); 55 const struct mtk_mmsys_routes *routes = mmsys->data->routes; 56 u32 reg; 57 int i; 58 59 for (i = 0; i < mmsys->data->num_routes; i++) 60 if (cur == routes[i].from_comp && next == routes[i].to_comp) { 61 reg = readl_relaxed(mmsys->regs + routes[i].addr) | routes[i].val; 62 writel_relaxed(reg, mmsys->regs + routes[i].addr); 63 } 64 } 65 EXPORT_SYMBOL_GPL(mtk_mmsys_ddp_connect); 66 67 void mtk_mmsys_ddp_disconnect(struct device *dev, 68 enum mtk_ddp_comp_id cur, 69 enum mtk_ddp_comp_id next) 70 { 71 struct mtk_mmsys *mmsys = dev_get_drvdata(dev); 72 const struct mtk_mmsys_routes *routes = mmsys->data->routes; 73 u32 reg; 74 int i; 75 76 for (i = 0; i < mmsys->data->num_routes; i++) 77 if (cur == routes[i].from_comp && next == routes[i].to_comp) { 78 reg = readl_relaxed(mmsys->regs + routes[i].addr) & ~routes[i].val; 79 writel_relaxed(reg, mmsys->regs + routes[i].addr); 80 } 81 } 82 EXPORT_SYMBOL_GPL(mtk_mmsys_ddp_disconnect); 83 84 static int mtk_mmsys_probe(struct platform_device *pdev) 85 { 86 struct device *dev = &pdev->dev; 87 struct platform_device *clks; 88 struct platform_device *drm; 89 struct mtk_mmsys *mmsys; 90 int ret; 91 92 mmsys = devm_kzalloc(dev, sizeof(*mmsys), GFP_KERNEL); 93 if (!mmsys) 94 return -ENOMEM; 95 96 mmsys->regs = devm_platform_ioremap_resource(pdev, 0); 97 if (IS_ERR(mmsys->regs)) { 98 ret = PTR_ERR(mmsys->regs); 99 dev_err(dev, "Failed to ioremap mmsys registers: %d\n", ret); 100 return ret; 101 } 102 103 mmsys->data = of_device_get_match_data(&pdev->dev); 104 platform_set_drvdata(pdev, mmsys); 105 106 clks = platform_device_register_data(&pdev->dev, mmsys->data->clk_driver, 107 PLATFORM_DEVID_AUTO, NULL, 0); 108 if (IS_ERR(clks)) 109 return PTR_ERR(clks); 110 111 drm = platform_device_register_data(&pdev->dev, "mediatek-drm", 112 PLATFORM_DEVID_AUTO, NULL, 0); 113 if (IS_ERR(drm)) { 114 platform_device_unregister(clks); 115 return PTR_ERR(drm); 116 } 117 118 return 0; 119 } 120 121 static const struct of_device_id of_match_mtk_mmsys[] = { 122 { 123 .compatible = "mediatek,mt2701-mmsys", 124 .data = &mt2701_mmsys_driver_data, 125 }, 126 { 127 .compatible = "mediatek,mt2712-mmsys", 128 .data = &mt2712_mmsys_driver_data, 129 }, 130 { 131 .compatible = "mediatek,mt6779-mmsys", 132 .data = &mt6779_mmsys_driver_data, 133 }, 134 { 135 .compatible = "mediatek,mt6797-mmsys", 136 .data = &mt6797_mmsys_driver_data, 137 }, 138 { 139 .compatible = "mediatek,mt8173-mmsys", 140 .data = &mt8173_mmsys_driver_data, 141 }, 142 { 143 .compatible = "mediatek,mt8183-mmsys", 144 .data = &mt8183_mmsys_driver_data, 145 }, 146 { } 147 }; 148 149 static struct platform_driver mtk_mmsys_drv = { 150 .driver = { 151 .name = "mtk-mmsys", 152 .of_match_table = of_match_mtk_mmsys, 153 }, 154 .probe = mtk_mmsys_probe, 155 }; 156 157 builtin_platform_driver(mtk_mmsys_drv); 158