| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Martin Blumenstingl | 1162 | 98.06% | 4 | 66.67% |
| Wei Yongjun | 21 | 1.77% | 1 | 16.67% |
| Thomas Gleixner | 2 | 0.17% | 1 | 16.67% |
| Total | 1185 | 6 |
// SPDX-License-Identifier: GPL-2.0-only /* * Meson8, Meson8b and GXBB USB2 PHY driver * * Copyright (C) 2016 Martin Blumenstingl <martin.blumenstingl@googlemail.com> */ #include <linux/clk.h> #include <linux/delay.h> #include <linux/io.h> #include <linux/module.h> #include <linux/of_device.h> #include <linux/reset.h> #include <linux/phy/phy.h> #include <linux/platform_device.h> #include <linux/usb/of.h> #define REG_CONFIG 0x00 #define REG_CONFIG_CLK_EN BIT(0) #define REG_CONFIG_CLK_SEL_MASK GENMASK(3, 1) #define REG_CONFIG_CLK_DIV_MASK GENMASK(10, 4) #define REG_CONFIG_CLK_32k_ALTSEL BIT(15) #define REG_CONFIG_TEST_TRIG BIT(31) #define REG_CTRL 0x04 #define REG_CTRL_SOFT_PRST BIT(0) #define REG_CTRL_SOFT_HRESET BIT(1) #define REG_CTRL_SS_SCALEDOWN_MODE_MASK GENMASK(3, 2) #define REG_CTRL_CLK_DET_RST BIT(4) #define REG_CTRL_INTR_SEL BIT(5) #define REG_CTRL_CLK_DETECTED BIT(8) #define REG_CTRL_SOF_SENT_RCVD_TGL BIT(9) #define REG_CTRL_SOF_TOGGLE_OUT BIT(10) #define REG_CTRL_POWER_ON_RESET BIT(15) #define REG_CTRL_SLEEPM BIT(16) #define REG_CTRL_TX_BITSTUFF_ENN_H BIT(17) #define REG_CTRL_TX_BITSTUFF_ENN BIT(18) #define REG_CTRL_COMMON_ON BIT(19) #define REG_CTRL_REF_CLK_SEL_MASK GENMASK(21, 20) #define REG_CTRL_REF_CLK_SEL_SHIFT 20 #define REG_CTRL_FSEL_MASK GENMASK(24, 22) #define REG_CTRL_FSEL_SHIFT 22 #define REG_CTRL_PORT_RESET BIT(25) #define REG_CTRL_THREAD_ID_MASK GENMASK(31, 26) #define REG_ENDP_INTR 0x08 /* bits [31:26], [24:21] and [15:3] seem to be read-only */ #define REG_ADP_BC 0x0c #define REG_ADP_BC_VBUS_VLD_EXT_SEL BIT(0) #define REG_ADP_BC_VBUS_VLD_EXT BIT(1) #define REG_ADP_BC_OTG_DISABLE BIT(2) #define REG_ADP_BC_ID_PULLUP BIT(3) #define REG_ADP_BC_DRV_VBUS BIT(4) #define REG_ADP_BC_ADP_PRB_EN BIT(5) #define REG_ADP_BC_ADP_DISCHARGE BIT(6) #define REG_ADP_BC_ADP_CHARGE BIT(7) #define REG_ADP_BC_SESS_END BIT(8) #define REG_ADP_BC_DEVICE_SESS_VLD BIT(9) #define REG_ADP_BC_B_VALID BIT(10) #define REG_ADP_BC_A_VALID BIT(11) #define REG_ADP_BC_ID_DIG BIT(12) #define REG_ADP_BC_VBUS_VALID BIT(13) #define REG_ADP_BC_ADP_PROBE BIT(14) #define REG_ADP_BC_ADP_SENSE BIT(15) #define REG_ADP_BC_ACA_ENABLE BIT(16) #define REG_ADP_BC_DCD_ENABLE BIT(17) #define REG_ADP_BC_VDAT_DET_EN_B BIT(18) #define REG_ADP_BC_VDAT_SRC_EN_B BIT(19) #define REG_ADP_BC_CHARGE_SEL BIT(20) #define REG_ADP_BC_CHARGE_DETECT BIT(21) #define REG_ADP_BC_ACA_PIN_RANGE_C BIT(22) #define REG_ADP_BC_ACA_PIN_RANGE_B BIT(23) #define REG_ADP_BC_ACA_PIN_RANGE_A BIT(24) #define REG_ADP_BC_ACA_PIN_GND BIT(25) #define REG_ADP_BC_ACA_PIN_FLOAT BIT(26) #define REG_DBG_UART 0x10 #define REG_TEST 0x14 #define REG_TEST_DATA_IN_MASK GENMASK(3, 0) #define REG_TEST_EN_MASK GENMASK(7, 4) #define REG_TEST_ADDR_MASK GENMASK(11, 8) #define REG_TEST_DATA_OUT_SEL BIT(12) #define REG_TEST_CLK BIT(13) #define REG_TEST_VA_TEST_EN_B_MASK GENMASK(15, 14) #define REG_TEST_DATA_OUT_MASK GENMASK(19, 16) #define REG_TEST_DISABLE_ID_PULLUP BIT(20) #define REG_TUNE 0x18 #define REG_TUNE_TX_RES_TUNE_MASK GENMASK(1, 0) #define REG_TUNE_TX_HSXV_TUNE_MASK GENMASK(3, 2) #define REG_TUNE_TX_VREF_TUNE_MASK GENMASK(7, 4) #define REG_TUNE_TX_RISE_TUNE_MASK GENMASK(9, 8) #define REG_TUNE_TX_PREEMP_PULSE_TUNE BIT(10) #define REG_TUNE_TX_PREEMP_AMP_TUNE_MASK GENMASK(12, 11) #define REG_TUNE_TX_FSLS_TUNE_MASK GENMASK(16, 13) #define REG_TUNE_SQRX_TUNE_MASK GENMASK(19, 17) #define REG_TUNE_OTG_TUNE GENMASK(22, 20) #define REG_TUNE_COMP_DIS_TUNE GENMASK(25, 23) #define REG_TUNE_HOST_DM_PULLDOWN BIT(26) #define REG_TUNE_HOST_DP_PULLDOWN BIT(27) #define RESET_COMPLETE_TIME 500 #define ACA_ENABLE_COMPLETE_TIME 50 struct phy_meson8b_usb2_priv { void __iomem *regs; enum usb_dr_mode dr_mode; struct clk *clk_usb_general; struct clk *clk_usb; struct reset_control *reset; }; static u32 phy_meson8b_usb2_read(struct phy_meson8b_usb2_priv *phy_priv, u32 reg) { return readl(phy_priv->regs + reg); } static void phy_meson8b_usb2_mask_bits(struct phy_meson8b_usb2_priv *phy_priv, u32 reg, u32 mask, u32 value) { u32 data; data = phy_meson8b_usb2_read(phy_priv, reg); data &= ~mask; data |= (value & mask); writel(data, phy_priv->regs + reg); } static int phy_meson8b_usb2_power_on(struct phy *phy) { struct phy_meson8b_usb2_priv *priv = phy_get_drvdata(phy); int ret; if (!IS_ERR_OR_NULL(priv->reset)) { ret = reset_control_reset(priv->reset); if (ret) { dev_err(&phy->dev, "Failed to trigger USB reset\n"); return ret; } } ret = clk_prepare_enable(priv->clk_usb_general); if (ret) { dev_err(&phy->dev, "Failed to enable USB general clock\n"); return ret; } ret = clk_prepare_enable(priv->clk_usb); if (ret) { dev_err(&phy->dev, "Failed to enable USB DDR clock\n"); clk_disable_unprepare(priv->clk_usb_general); return ret; } phy_meson8b_usb2_mask_bits(priv, REG_CONFIG, REG_CONFIG_CLK_32k_ALTSEL, REG_CONFIG_CLK_32k_ALTSEL); phy_meson8b_usb2_mask_bits(priv, REG_CTRL, REG_CTRL_REF_CLK_SEL_MASK, 0x2 << REG_CTRL_REF_CLK_SEL_SHIFT); phy_meson8b_usb2_mask_bits(priv, REG_CTRL, REG_CTRL_FSEL_MASK, 0x5 << REG_CTRL_FSEL_SHIFT); /* reset the PHY */ phy_meson8b_usb2_mask_bits(priv, REG_CTRL, REG_CTRL_POWER_ON_RESET, REG_CTRL_POWER_ON_RESET); udelay(RESET_COMPLETE_TIME); phy_meson8b_usb2_mask_bits(priv, REG_CTRL, REG_CTRL_POWER_ON_RESET, 0); udelay(RESET_COMPLETE_TIME); phy_meson8b_usb2_mask_bits(priv, REG_CTRL, REG_CTRL_SOF_TOGGLE_OUT, REG_CTRL_SOF_TOGGLE_OUT); if (priv->dr_mode == USB_DR_MODE_HOST) { phy_meson8b_usb2_mask_bits(priv, REG_ADP_BC, REG_ADP_BC_ACA_ENABLE, REG_ADP_BC_ACA_ENABLE); udelay(ACA_ENABLE_COMPLETE_TIME); if (phy_meson8b_usb2_read(priv, REG_ADP_BC) & REG_ADP_BC_ACA_PIN_FLOAT) { dev_warn(&phy->dev, "USB ID detect failed!\n"); clk_disable_unprepare(priv->clk_usb); clk_disable_unprepare(priv->clk_usb_general); return -EINVAL; } } return 0; } static int phy_meson8b_usb2_power_off(struct phy *phy) { struct phy_meson8b_usb2_priv *priv = phy_get_drvdata(phy); clk_disable_unprepare(priv->clk_usb); clk_disable_unprepare(priv->clk_usb_general); return 0; } static const struct phy_ops phy_meson8b_usb2_ops = { .power_on = phy_meson8b_usb2_power_on, .power_off = phy_meson8b_usb2_power_off, .owner = THIS_MODULE, }; static int phy_meson8b_usb2_probe(struct platform_device *pdev) { struct phy_meson8b_usb2_priv *priv; struct resource *res; struct phy *phy; struct phy_provider *phy_provider; priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL); if (!priv) return -ENOMEM; res = platform_get_resource(pdev, IORESOURCE_MEM, 0); priv->regs = devm_ioremap_resource(&pdev->dev, res); if (IS_ERR(priv->regs)) return PTR_ERR(priv->regs); priv->clk_usb_general = devm_clk_get(&pdev->dev, "usb_general"); if (IS_ERR(priv->clk_usb_general)) return PTR_ERR(priv->clk_usb_general); priv->clk_usb = devm_clk_get(&pdev->dev, "usb"); if (IS_ERR(priv->clk_usb)) return PTR_ERR(priv->clk_usb); priv->reset = devm_reset_control_get_optional_shared(&pdev->dev, NULL); if (PTR_ERR(priv->reset) == -EPROBE_DEFER) return PTR_ERR(priv->reset); priv->dr_mode = of_usb_get_dr_mode_by_phy(pdev->dev.of_node, -1); if (priv->dr_mode == USB_DR_MODE_UNKNOWN) { dev_err(&pdev->dev, "missing dual role configuration of the controller\n"); return -EINVAL; } phy = devm_phy_create(&pdev->dev, NULL, &phy_meson8b_usb2_ops); if (IS_ERR(phy)) { dev_err(&pdev->dev, "failed to create PHY\n"); return PTR_ERR(phy); } phy_set_drvdata(phy, priv); phy_provider = devm_of_phy_provider_register(&pdev->dev, of_phy_simple_xlate); return PTR_ERR_OR_ZERO(phy_provider); } static const struct of_device_id phy_meson8b_usb2_of_match[] = { { .compatible = "amlogic,meson8-usb2-phy", }, { .compatible = "amlogic,meson8b-usb2-phy", }, { .compatible = "amlogic,meson-gxbb-usb2-phy", }, { }, }; MODULE_DEVICE_TABLE(of, phy_meson8b_usb2_of_match); static struct platform_driver phy_meson8b_usb2_driver = { .probe = phy_meson8b_usb2_probe, .driver = { .name = "phy-meson-usb2", .of_match_table = phy_meson8b_usb2_of_match, }, }; module_platform_driver(phy_meson8b_usb2_driver); MODULE_AUTHOR("Martin Blumenstingl <martin.blumenstingl@googlemail.com>"); MODULE_DESCRIPTION("Meson8, Meson8b and GXBB USB2 PHY driver"); MODULE_LICENSE("GPL");
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