| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Changhuang Liang | 1052 | 100.00% | 1 | 100.00% |
| Total | 1052 | 1 |
// SPDX-License-Identifier: GPL-2.0+ /* * StarFive JH7110 DPHY RX driver * * Copyright (C) 2023 StarFive Technology Co., Ltd. * Author: Jack Zhu <jack.zhu@starfivetech.com> * Author: Changhuang Liang <changhuang.liang@starfivetech.com> */ #include <linux/bitfield.h> #include <linux/bitops.h> #include <linux/clk.h> #include <linux/io.h> #include <linux/module.h> #include <linux/of.h> #include <linux/phy/phy.h> #include <linux/platform_device.h> #include <linux/pm_runtime.h> #include <linux/reset.h> #define STF_DPHY_APBCFGSAIF_SYSCFG(x) (x) #define STF_DPHY_ENABLE_CLK BIT(6) #define STF_DPHY_ENABLE_CLK1 BIT(7) #define STF_DPHY_ENABLE_LAN0 BIT(8) #define STF_DPHY_ENABLE_LAN1 BIT(9) #define STF_DPHY_ENABLE_LAN2 BIT(10) #define STF_DPHY_ENABLE_LAN3 BIT(11) #define STF_DPHY_LANE_SWAP_CLK GENMASK(22, 20) #define STF_DPHY_LANE_SWAP_CLK1 GENMASK(25, 23) #define STF_DPHY_LANE_SWAP_LAN0 GENMASK(28, 26) #define STF_DPHY_LANE_SWAP_LAN1 GENMASK(31, 29) #define STF_DPHY_LANE_SWAP_LAN2 GENMASK(2, 0) #define STF_DPHY_LANE_SWAP_LAN3 GENMASK(5, 3) #define STF_DPHY_PLL_CLK_SEL GENMASK(21, 12) #define STF_DPHY_PRECOUNTER_IN_CLK GENMASK(29, 22) #define STF_DPHY_PRECOUNTER_IN_CLK1 GENMASK(7, 0) #define STF_DPHY_PRECOUNTER_IN_LAN0 GENMASK(15, 8) #define STF_DPHY_PRECOUNTER_IN_LAN1 GENMASK(23, 16) #define STF_DPHY_PRECOUNTER_IN_LAN2 GENMASK(31, 24) #define STF_DPHY_PRECOUNTER_IN_LAN3 GENMASK(7, 0) #define STF_DPHY_RX_1C2C_SEL BIT(8) #define STF_MAP_LANES_NUM 6 struct stf_dphy_info { /** * @maps: * * Physical lanes and logic lanes mapping table. * * The default order is: * [clk lane0, data lane 0, data lane 1, data lane 2, date lane 3, clk lane 1] */ u8 maps[STF_MAP_LANES_NUM]; }; struct stf_dphy { struct device *dev; void __iomem *regs; struct clk *cfg_clk; struct clk *ref_clk; struct clk *tx_clk; struct reset_control *rstc; struct regulator *mipi_0p9; struct phy *phy; const struct stf_dphy_info *info; }; static int stf_dphy_configure(struct phy *phy, union phy_configure_opts *opts) { struct stf_dphy *dphy = phy_get_drvdata(phy); const struct stf_dphy_info *info = dphy->info; writel(FIELD_PREP(STF_DPHY_ENABLE_CLK, 1) | FIELD_PREP(STF_DPHY_ENABLE_CLK1, 1) | FIELD_PREP(STF_DPHY_ENABLE_LAN0, 1) | FIELD_PREP(STF_DPHY_ENABLE_LAN1, 1) | FIELD_PREP(STF_DPHY_ENABLE_LAN2, 1) | FIELD_PREP(STF_DPHY_ENABLE_LAN3, 1) | FIELD_PREP(STF_DPHY_LANE_SWAP_CLK, info->maps[0]) | FIELD_PREP(STF_DPHY_LANE_SWAP_CLK1, info->maps[5]) | FIELD_PREP(STF_DPHY_LANE_SWAP_LAN0, info->maps[1]) | FIELD_PREP(STF_DPHY_LANE_SWAP_LAN1, info->maps[2]), dphy->regs + STF_DPHY_APBCFGSAIF_SYSCFG(188)); writel(FIELD_PREP(STF_DPHY_LANE_SWAP_LAN2, info->maps[3]) | FIELD_PREP(STF_DPHY_LANE_SWAP_LAN3, info->maps[4]) | FIELD_PREP(STF_DPHY_PRECOUNTER_IN_CLK, 8), dphy->regs + STF_DPHY_APBCFGSAIF_SYSCFG(192)); writel(FIELD_PREP(STF_DPHY_PRECOUNTER_IN_CLK1, 8) | FIELD_PREP(STF_DPHY_PRECOUNTER_IN_LAN0, 7) | FIELD_PREP(STF_DPHY_PRECOUNTER_IN_LAN1, 7) | FIELD_PREP(STF_DPHY_PRECOUNTER_IN_LAN2, 7), dphy->regs + STF_DPHY_APBCFGSAIF_SYSCFG(196)); writel(FIELD_PREP(STF_DPHY_PRECOUNTER_IN_LAN3, 7), dphy->regs + STF_DPHY_APBCFGSAIF_SYSCFG(200)); return 0; } static int stf_dphy_power_on(struct phy *phy) { struct stf_dphy *dphy = phy_get_drvdata(phy); int ret; ret = pm_runtime_resume_and_get(dphy->dev); if (ret < 0) return ret; ret = regulator_enable(dphy->mipi_0p9); if (ret) { pm_runtime_put(dphy->dev); return ret; } clk_set_rate(dphy->cfg_clk, 99000000); clk_set_rate(dphy->ref_clk, 49500000); clk_set_rate(dphy->tx_clk, 19800000); reset_control_deassert(dphy->rstc); return 0; } static int stf_dphy_power_off(struct phy *phy) { struct stf_dphy *dphy = phy_get_drvdata(phy); reset_control_assert(dphy->rstc); regulator_disable(dphy->mipi_0p9); pm_runtime_put_sync(dphy->dev); return 0; } static const struct phy_ops stf_dphy_ops = { .configure = stf_dphy_configure, .power_on = stf_dphy_power_on, .power_off = stf_dphy_power_off, }; static int stf_dphy_probe(struct platform_device *pdev) { struct phy_provider *phy_provider; struct stf_dphy *dphy; dphy = devm_kzalloc(&pdev->dev, sizeof(*dphy), GFP_KERNEL); if (!dphy) return -ENOMEM; dphy->info = of_device_get_match_data(&pdev->dev); dev_set_drvdata(&pdev->dev, dphy); dphy->dev = &pdev->dev; dphy->regs = devm_platform_ioremap_resource(pdev, 0); if (IS_ERR(dphy->regs)) return PTR_ERR(dphy->regs); dphy->cfg_clk = devm_clk_get(&pdev->dev, "cfg"); if (IS_ERR(dphy->cfg_clk)) return PTR_ERR(dphy->cfg_clk); dphy->ref_clk = devm_clk_get(&pdev->dev, "ref"); if (IS_ERR(dphy->ref_clk)) return PTR_ERR(dphy->ref_clk); dphy->tx_clk = devm_clk_get(&pdev->dev, "tx"); if (IS_ERR(dphy->tx_clk)) return PTR_ERR(dphy->tx_clk); dphy->rstc = devm_reset_control_array_get_exclusive(&pdev->dev); if (IS_ERR(dphy->rstc)) return PTR_ERR(dphy->rstc); dphy->mipi_0p9 = devm_regulator_get(&pdev->dev, "mipi_0p9"); if (IS_ERR(dphy->mipi_0p9)) return PTR_ERR(dphy->mipi_0p9); dphy->phy = devm_phy_create(&pdev->dev, NULL, &stf_dphy_ops); if (IS_ERR(dphy->phy)) { dev_err(&pdev->dev, "Failed to create PHY\n"); return PTR_ERR(dphy->phy); } pm_runtime_enable(&pdev->dev); phy_set_drvdata(dphy->phy, dphy); phy_provider = devm_of_phy_provider_register(&pdev->dev, of_phy_simple_xlate); return PTR_ERR_OR_ZERO(phy_provider); } static const struct stf_dphy_info starfive_dphy_info = { .maps = {4, 0, 1, 2, 3, 5}, }; static const struct of_device_id stf_dphy_dt_ids[] = { { .compatible = "starfive,jh7110-dphy-rx", .data = &starfive_dphy_info, }, { /* sentinel */ }, }; MODULE_DEVICE_TABLE(of, stf_dphy_dt_ids); static struct platform_driver stf_dphy_driver = { .probe = stf_dphy_probe, .driver = { .name = "starfive-dphy-rx", .of_match_table = stf_dphy_dt_ids, }, }; module_platform_driver(stf_dphy_driver); MODULE_AUTHOR("Jack Zhu <jack.zhu@starfivetech.com>"); MODULE_AUTHOR("Changhuang Liang <changhuang.liang@starfivetech.com>"); MODULE_DESCRIPTION("StarFive JH7110 DPHY RX driver"); MODULE_LICENSE("GPL");
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