OSCL-LXR linux-6.0.1/​drivers/​soc/​mediatek/​mtk-mmsys.c	Source navigation Diff markup Identifier search General search
	Version: linux-6.0.1 spark-3.0.0 hadoop-3.2.0-src hadoop-3.3.0-src spark-2.4.7 linux-4.15.13 hadoop-2.7.4-src Revert   Change

 // SPDX-License-Identifier: GPL-2.0-only
 /*
  * Copyright (c) 2014 MediaTek Inc.
  * Author: James Liao <jamesjj.liao@mediatek.com>
  */
 
 #include <linux/delay.h>
 #include <linux/device.h>
 #include <linux/io.h>
 #include <linux/of_device.h>
 #include <linux/platform_device.h>
 #include <linux/reset-controller.h>
 #include <linux/soc/mediatek/mtk-mmsys.h>
 
 #include "mtk-mmsys.h"
 #include "mt8167-mmsys.h"
 #include "mt8183-mmsys.h"
 #include "mt8186-mmsys.h"
 #include "mt8192-mmsys.h"
 #include "mt8195-mmsys.h"
 #include "mt8365-mmsys.h"
 
 static const struct mtk_mmsys_driver_data mt2701_mmsys_driver_data = {
     .clk_driver = "clk-mt2701-mm",
     .routes = mmsys_default_routing_table,
     .num_routes = ARRAY_SIZE(mmsys_default_routing_table),
 };
 
 static const struct mtk_mmsys_match_data mt2701_mmsys_match_data = {
     .num_drv_data = 1,
     .drv_data = {
         &mt2701_mmsys_driver_data,
     },
 };
 
 static const struct mtk_mmsys_driver_data mt2712_mmsys_driver_data = {
     .clk_driver = "clk-mt2712-mm",
     .routes = mmsys_default_routing_table,
     .num_routes = ARRAY_SIZE(mmsys_default_routing_table),
 };
 
 static const struct mtk_mmsys_match_data mt2712_mmsys_match_data = {
     .num_drv_data = 1,
     .drv_data = {
         &mt2712_mmsys_driver_data,
     },
 };
 
 static const struct mtk_mmsys_driver_data mt6779_mmsys_driver_data = {
     .clk_driver = "clk-mt6779-mm",
 };
 
 static const struct mtk_mmsys_match_data mt6779_mmsys_match_data = {
     .num_drv_data = 1,
     .drv_data = {
         &mt6779_mmsys_driver_data,
     },
 };
 
 static const struct mtk_mmsys_driver_data mt6797_mmsys_driver_data = {
     .clk_driver = "clk-mt6797-mm",
 };
 
 static const struct mtk_mmsys_match_data mt6797_mmsys_match_data = {
     .num_drv_data = 1,
     .drv_data = {
         &mt6797_mmsys_driver_data,
     },
 };
 
 static const struct mtk_mmsys_driver_data mt8167_mmsys_driver_data = {
     .clk_driver = "clk-mt8167-mm",
     .routes = mt8167_mmsys_routing_table,
     .num_routes = ARRAY_SIZE(mt8167_mmsys_routing_table),
 };
 
 static const struct mtk_mmsys_match_data mt8167_mmsys_match_data = {
     .num_drv_data = 1,
     .drv_data = {
         &mt8167_mmsys_driver_data,
     },
 };
 
 static const struct mtk_mmsys_driver_data mt8173_mmsys_driver_data = {
     .clk_driver = "clk-mt8173-mm",
     .routes = mmsys_default_routing_table,
     .num_routes = ARRAY_SIZE(mmsys_default_routing_table),
     .sw0_rst_offset = MT8183_MMSYS_SW0_RST_B,
 };
 
 static const struct mtk_mmsys_match_data mt8173_mmsys_match_data = {
     .num_drv_data = 1,
     .drv_data = {
         &mt8173_mmsys_driver_data,
     },
 };
 
 static const struct mtk_mmsys_driver_data mt8183_mmsys_driver_data = {
     .clk_driver = "clk-mt8183-mm",
     .routes = mmsys_mt8183_routing_table,
     .num_routes = ARRAY_SIZE(mmsys_mt8183_routing_table),
     .sw0_rst_offset = MT8183_MMSYS_SW0_RST_B,
 };
 
 static const struct mtk_mmsys_match_data mt8183_mmsys_match_data = {
     .num_drv_data = 1,
     .drv_data = {
         &mt8183_mmsys_driver_data,
     },
 };
 
 static const struct mtk_mmsys_driver_data mt8186_mmsys_driver_data = {
     .clk_driver = "clk-mt8186-mm",
     .routes = mmsys_mt8186_routing_table,
     .num_routes = ARRAY_SIZE(mmsys_mt8186_routing_table),
     .sw0_rst_offset = MT8186_MMSYS_SW0_RST_B,
 };
 
 static const struct mtk_mmsys_match_data mt8186_mmsys_match_data = {
     .num_drv_data = 1,
     .drv_data = {
         &mt8186_mmsys_driver_data,
     },
 };
 
 static const struct mtk_mmsys_driver_data mt8192_mmsys_driver_data = {
     .clk_driver = "clk-mt8192-mm",
     .routes = mmsys_mt8192_routing_table,
     .num_routes = ARRAY_SIZE(mmsys_mt8192_routing_table),
     .sw0_rst_offset = MT8186_MMSYS_SW0_RST_B,
 };
 
 static const struct mtk_mmsys_match_data mt8192_mmsys_match_data = {
     .num_drv_data = 1,
     .drv_data = {
         &mt8192_mmsys_driver_data,
     },
 };
 
 static const struct mtk_mmsys_driver_data mt8195_vdosys0_driver_data = {
     .io_start = 0x1c01a000,
     .clk_driver = "clk-mt8195-vdo0",
     .routes = mmsys_mt8195_routing_table,
     .num_routes = ARRAY_SIZE(mmsys_mt8195_routing_table),
 };
 
 static const struct mtk_mmsys_driver_data mt8195_vdosys1_driver_data = {
     .io_start = 0x1c100000,
     .clk_driver = "clk-mt8195-vdo1",
 };
 
 static const struct mtk_mmsys_match_data mt8195_mmsys_match_data = {
     .num_drv_data = 2,
     .drv_data = {
         &mt8195_vdosys0_driver_data,
         &mt8195_vdosys1_driver_data,
     },
 };
 
 static const struct mtk_mmsys_driver_data mt8365_mmsys_driver_data = {
     .clk_driver = "clk-mt8365-mm",
     .routes = mt8365_mmsys_routing_table,
     .num_routes = ARRAY_SIZE(mt8365_mmsys_routing_table),
 };
 
 static const struct mtk_mmsys_match_data mt8365_mmsys_match_data = {
     .num_drv_data = 1,
     .drv_data = {
         &mt8365_mmsys_driver_data,
     },
 };
 
 struct mtk_mmsys {
     void __iomem *regs;
     const struct mtk_mmsys_driver_data *data;
     spinlock_t lock; /* protects mmsys_sw_rst_b reg */
     struct reset_controller_dev rcdev;
     phys_addr_t io_start;
 };
 
 static int mtk_mmsys_find_match_drvdata(struct mtk_mmsys *mmsys,
                     const struct mtk_mmsys_match_data *match)
 {
     int i;
 
     for (i = 0; i < match->num_drv_data; i++)
         if (mmsys->io_start == match->drv_data[i]->io_start)
             return i;
 
     return -EINVAL;
 }
 
 void mtk_mmsys_ddp_connect(struct device *dev,
                enum mtk_ddp_comp_id cur,
                enum mtk_ddp_comp_id next)
 {
     struct mtk_mmsys *mmsys = dev_get_drvdata(dev);
     const struct mtk_mmsys_routes *routes = mmsys->data->routes;
     u32 reg;
     int i;
 
     for (i = 0; i < mmsys->data->num_routes; i++)
         if (cur == routes[i].from_comp && next == routes[i].to_comp) {
             reg = readl_relaxed(mmsys->regs + routes[i].addr);
             reg &= ~routes[i].mask;
             reg |= routes[i].val;
             writel_relaxed(reg, mmsys->regs + routes[i].addr);
         }
 }
 EXPORT_SYMBOL_GPL(mtk_mmsys_ddp_connect);
 
 void mtk_mmsys_ddp_disconnect(struct device *dev,
                   enum mtk_ddp_comp_id cur,
                   enum mtk_ddp_comp_id next)
 {
     struct mtk_mmsys *mmsys = dev_get_drvdata(dev);
     const struct mtk_mmsys_routes *routes = mmsys->data->routes;
     u32 reg;
     int i;
 
     for (i = 0; i < mmsys->data->num_routes; i++)
         if (cur == routes[i].from_comp && next == routes[i].to_comp) {
             reg = readl_relaxed(mmsys->regs + routes[i].addr);
             reg &= ~routes[i].mask;
             writel_relaxed(reg, mmsys->regs + routes[i].addr);
         }
 }
 EXPORT_SYMBOL_GPL(mtk_mmsys_ddp_disconnect);
 
 static int mtk_mmsys_reset_update(struct reset_controller_dev *rcdev, unsigned long id,
                   bool assert)
 {
     struct mtk_mmsys *mmsys = container_of(rcdev, struct mtk_mmsys, rcdev);
     unsigned long flags;
     u32 reg;
 
     spin_lock_irqsave(&mmsys->lock, flags);
 
     reg = readl_relaxed(mmsys->regs + mmsys->data->sw0_rst_offset);
 
     if (assert)
         reg &= ~BIT(id);
     else
         reg |= BIT(id);
 
     writel_relaxed(reg, mmsys->regs + mmsys->data->sw0_rst_offset);
 
     spin_unlock_irqrestore(&mmsys->lock, flags);
 
     return 0;
 }
 
 static int mtk_mmsys_reset_assert(struct reset_controller_dev *rcdev, unsigned long id)
 {
     return mtk_mmsys_reset_update(rcdev, id, true);
 }
 
 static int mtk_mmsys_reset_deassert(struct reset_controller_dev *rcdev, unsigned long id)
 {
     return mtk_mmsys_reset_update(rcdev, id, false);
 }
 
 static int mtk_mmsys_reset(struct reset_controller_dev *rcdev, unsigned long id)
 {
     int ret;
 
     ret = mtk_mmsys_reset_assert(rcdev, id);
     if (ret)
         return ret;
 
     usleep_range(1000, 1100);
 
     return mtk_mmsys_reset_deassert(rcdev, id);
 }
 
 static const struct reset_control_ops mtk_mmsys_reset_ops = {
     .assert = mtk_mmsys_reset_assert,
     .deassert = mtk_mmsys_reset_deassert,
     .reset = mtk_mmsys_reset,
 };
 
 static int mtk_mmsys_probe(struct platform_device *pdev)
 {
     struct device *dev = &pdev->dev;
     struct platform_device *clks;
     struct platform_device *drm;
     const struct mtk_mmsys_match_data *match_data;
     struct mtk_mmsys *mmsys;
     struct resource *res;
     int ret;
 
     mmsys = devm_kzalloc(dev, sizeof(*mmsys), GFP_KERNEL);
     if (!mmsys)
         return -ENOMEM;
 
     mmsys->regs = devm_platform_ioremap_resource(pdev, 0);
     if (IS_ERR(mmsys->regs)) {
         ret = PTR_ERR(mmsys->regs);
         dev_err(dev, "Failed to ioremap mmsys registers: %d\n", ret);
         return ret;
     }
 
     spin_lock_init(&mmsys->lock);
 
     mmsys->rcdev.owner = THIS_MODULE;
     mmsys->rcdev.nr_resets = 32;
     mmsys->rcdev.ops = &mtk_mmsys_reset_ops;
     mmsys->rcdev.of_node = pdev->dev.of_node;
     ret = devm_reset_controller_register(&pdev->dev, &mmsys->rcdev);
     if (ret) {
         dev_err(&pdev->dev, "Couldn't register mmsys reset controller: %d\n", ret);
         return ret;
     }
 
     res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
     if (!res) {
         dev_err(dev, "Couldn't get mmsys resource\n");
         return -EINVAL;
     }
     mmsys->io_start = res->start;
 
     match_data = of_device_get_match_data(dev);
     if (match_data->num_drv_data > 1) {
         /* This SoC has multiple mmsys channels */
         ret = mtk_mmsys_find_match_drvdata(mmsys, match_data);
         if (ret < 0) {
             dev_err(dev, "Couldn't get match driver data\n");
             return ret;
         }
         mmsys->data = match_data->drv_data[ret];
     } else {
         dev_dbg(dev, "Using single mmsys channel\n");
         mmsys->data = match_data->drv_data[0];
     }
 
     platform_set_drvdata(pdev, mmsys);
 
     clks = platform_device_register_data(&pdev->dev, mmsys->data->clk_driver,
                          PLATFORM_DEVID_AUTO, NULL, 0);
     if (IS_ERR(clks))
         return PTR_ERR(clks);
 
     drm = platform_device_register_data(&pdev->dev, "mediatek-drm",
                         PLATFORM_DEVID_AUTO, NULL, 0);
     if (IS_ERR(drm)) {
         platform_device_unregister(clks);
         return PTR_ERR(drm);
     }
 
     return 0;
 }
 
 static const struct of_device_id of_match_mtk_mmsys[] = {
     {
         .compatible = "mediatek,mt2701-mmsys",
         .data = &mt2701_mmsys_match_data,
     },
     {
         .compatible = "mediatek,mt2712-mmsys",
         .data = &mt2712_mmsys_match_data,
     },
     {
         .compatible = "mediatek,mt6779-mmsys",
         .data = &mt6779_mmsys_match_data,
     },
     {
         .compatible = "mediatek,mt6797-mmsys",
         .data = &mt6797_mmsys_match_data,
     },
     {
         .compatible = "mediatek,mt8167-mmsys",
         .data = &mt8167_mmsys_match_data,
     },
     {
         .compatible = "mediatek,mt8173-mmsys",
         .data = &mt8173_mmsys_match_data,
     },
     {
         .compatible = "mediatek,mt8183-mmsys",
         .data = &mt8183_mmsys_match_data,
     },
     {
         .compatible = "mediatek,mt8186-mmsys",
         .data = &mt8186_mmsys_match_data,
     },
     {
         .compatible = "mediatek,mt8192-mmsys",
         .data = &mt8192_mmsys_match_data,
     },
     {
         .compatible = "mediatek,mt8195-mmsys",
         .data = &mt8195_mmsys_match_data,
     },
     {
         .compatible = "mediatek,mt8365-mmsys",
         .data = &mt8365_mmsys_match_data,
     },
     { }
 };
 
 static struct platform_driver mtk_mmsys_drv = {
     .driver = {
         .name = "mtk-mmsys",
         .of_match_table = of_match_mtk_mmsys,
     },
     .probe = mtk_mmsys_probe,
 };
 
 builtin_platform_driver(mtk_mmsys_drv);

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