| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Martin Blumenstingl | 1190 | 99.58% | 5 | 83.33% |
| Grygorii Strashko | 5 | 0.42% | 1 | 16.67% |
| Total | 1195 | 6 |
/* * Meson GXL and GXM USB2 PHY driver * * Copyright (C) 2017 Martin Blumenstingl <martin.blumenstingl@googlemail.com> * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as * published by the Free Software Foundation. * * You should have received a copy of the GNU General Public License * along with this program. If not, see <http://www.gnu.org/licenses/>. */ #include <linux/clk.h> #include <linux/delay.h> #include <linux/io.h> #include <linux/module.h> #include <linux/of_device.h> #include <linux/regmap.h> #include <linux/reset.h> #include <linux/phy/phy.h> #include <linux/platform_device.h> /* bits [31:27] are read-only */ #define U2P_R0 0x0 #define U2P_R0_BYPASS_SEL BIT(0) #define U2P_R0_BYPASS_DM_EN BIT(1) #define U2P_R0_BYPASS_DP_EN BIT(2) #define U2P_R0_TXBITSTUFF_ENH BIT(3) #define U2P_R0_TXBITSTUFF_EN BIT(4) #define U2P_R0_DM_PULLDOWN BIT(5) #define U2P_R0_DP_PULLDOWN BIT(6) #define U2P_R0_DP_VBUS_VLD_EXT_SEL BIT(7) #define U2P_R0_DP_VBUS_VLD_EXT BIT(8) #define U2P_R0_ADP_PRB_EN BIT(9) #define U2P_R0_ADP_DISCHARGE BIT(10) #define U2P_R0_ADP_CHARGE BIT(11) #define U2P_R0_DRV_VBUS BIT(12) #define U2P_R0_ID_PULLUP BIT(13) #define U2P_R0_LOOPBACK_EN_B BIT(14) #define U2P_R0_OTG_DISABLE BIT(15) #define U2P_R0_COMMON_ONN BIT(16) #define U2P_R0_FSEL_MASK GENMASK(19, 17) #define U2P_R0_REF_CLK_SEL_MASK GENMASK(21, 20) #define U2P_R0_POWER_ON_RESET BIT(22) #define U2P_R0_V_ATE_TEST_EN_B_MASK GENMASK(24, 23) #define U2P_R0_ID_SET_ID_DQ BIT(25) #define U2P_R0_ATE_RESET BIT(26) #define U2P_R0_FSV_MINUS BIT(27) #define U2P_R0_FSV_PLUS BIT(28) #define U2P_R0_BYPASS_DM_DATA BIT(29) #define U2P_R0_BYPASS_DP_DATA BIT(30) #define U2P_R1 0x4 #define U2P_R1_BURN_IN_TEST BIT(0) #define U2P_R1_ACA_ENABLE BIT(1) #define U2P_R1_DCD_ENABLE BIT(2) #define U2P_R1_VDAT_SRC_EN_B BIT(3) #define U2P_R1_VDAT_DET_EN_B BIT(4) #define U2P_R1_CHARGES_SEL BIT(5) #define U2P_R1_TX_PREEMP_PULSE_TUNE BIT(6) #define U2P_R1_TX_PREEMP_AMP_TUNE_MASK GENMASK(8, 7) #define U2P_R1_TX_RES_TUNE_MASK GENMASK(10, 9) #define U2P_R1_TX_RISE_TUNE_MASK GENMASK(12, 11) #define U2P_R1_TX_VREF_TUNE_MASK GENMASK(16, 13) #define U2P_R1_TX_FSLS_TUNE_MASK GENMASK(20, 17) #define U2P_R1_TX_HSXV_TUNE_MASK GENMASK(22, 21) #define U2P_R1_OTG_TUNE_MASK GENMASK(25, 23) #define U2P_R1_SQRX_TUNE_MASK GENMASK(28, 26) #define U2P_R1_COMP_DIS_TUNE_MASK GENMASK(31, 29) /* bits [31:14] are read-only */ #define U2P_R2 0x8 #define U2P_R2_TESTDATA_IN_MASK GENMASK(7, 0) #define U2P_R2_TESTADDR_MASK GENMASK(11, 8) #define U2P_R2_TESTDATA_OUT_SEL BIT(12) #define U2P_R2_TESTCLK BIT(13) #define U2P_R2_TESTDATA_OUT_MASK GENMASK(17, 14) #define U2P_R2_ACA_PIN_RANGE_C BIT(18) #define U2P_R2_ACA_PIN_RANGE_B BIT(19) #define U2P_R2_ACA_PIN_RANGE_A BIT(20) #define U2P_R2_ACA_PIN_GND BIT(21) #define U2P_R2_ACA_PIN_FLOAT BIT(22) #define U2P_R2_CHARGE_DETECT BIT(23) #define U2P_R2_DEVICE_SESSION_VALID BIT(24) #define U2P_R2_ADP_PROBE BIT(25) #define U2P_R2_ADP_SENSE BIT(26) #define U2P_R2_SESSION_END BIT(27) #define U2P_R2_VBUS_VALID BIT(28) #define U2P_R2_B_VALID BIT(29) #define U2P_R2_A_VALID BIT(30) #define U2P_R2_ID_DIG BIT(31) #define U2P_R3 0xc #define RESET_COMPLETE_TIME 500 struct phy_meson_gxl_usb2_priv { struct regmap *regmap; enum phy_mode mode; int is_enabled; struct clk *clk; struct reset_control *reset; }; static const struct regmap_config phy_meson_gxl_usb2_regmap_conf = { .reg_bits = 8, .val_bits = 32, .reg_stride = 4, .max_register = U2P_R3, }; static int phy_meson_gxl_usb2_init(struct phy *phy) { struct phy_meson_gxl_usb2_priv *priv = phy_get_drvdata(phy); int ret; ret = reset_control_reset(priv->reset); if (ret) return ret; ret = clk_prepare_enable(priv->clk); if (ret) return ret; return 0; } static int phy_meson_gxl_usb2_exit(struct phy *phy) { struct phy_meson_gxl_usb2_priv *priv = phy_get_drvdata(phy); clk_disable_unprepare(priv->clk); return 0; } static int phy_meson_gxl_usb2_reset(struct phy *phy) { struct phy_meson_gxl_usb2_priv *priv = phy_get_drvdata(phy); if (priv->is_enabled) { /* reset the PHY and wait until settings are stabilized */ regmap_update_bits(priv->regmap, U2P_R0, U2P_R0_POWER_ON_RESET, U2P_R0_POWER_ON_RESET); udelay(RESET_COMPLETE_TIME); regmap_update_bits(priv->regmap, U2P_R0, U2P_R0_POWER_ON_RESET, 0); udelay(RESET_COMPLETE_TIME); } return 0; } static int phy_meson_gxl_usb2_set_mode(struct phy *phy, enum phy_mode mode, int submode) { struct phy_meson_gxl_usb2_priv *priv = phy_get_drvdata(phy); switch (mode) { case PHY_MODE_USB_HOST: case PHY_MODE_USB_OTG: regmap_update_bits(priv->regmap, U2P_R0, U2P_R0_DM_PULLDOWN, U2P_R0_DM_PULLDOWN); regmap_update_bits(priv->regmap, U2P_R0, U2P_R0_DP_PULLDOWN, U2P_R0_DP_PULLDOWN); regmap_update_bits(priv->regmap, U2P_R0, U2P_R0_ID_PULLUP, 0); break; case PHY_MODE_USB_DEVICE: regmap_update_bits(priv->regmap, U2P_R0, U2P_R0_DM_PULLDOWN, 0); regmap_update_bits(priv->regmap, U2P_R0, U2P_R0_DP_PULLDOWN, 0); regmap_update_bits(priv->regmap, U2P_R0, U2P_R0_ID_PULLUP, U2P_R0_ID_PULLUP); break; default: return -EINVAL; } phy_meson_gxl_usb2_reset(phy); priv->mode = mode; return 0; } static int phy_meson_gxl_usb2_power_off(struct phy *phy) { struct phy_meson_gxl_usb2_priv *priv = phy_get_drvdata(phy); priv->is_enabled = 0; /* power off the PHY by putting it into reset mode */ regmap_update_bits(priv->regmap, U2P_R0, U2P_R0_POWER_ON_RESET, U2P_R0_POWER_ON_RESET); return 0; } static int phy_meson_gxl_usb2_power_on(struct phy *phy) { struct phy_meson_gxl_usb2_priv *priv = phy_get_drvdata(phy); int ret; priv->is_enabled = 1; /* power on the PHY by taking it out of reset mode */ regmap_update_bits(priv->regmap, U2P_R0, U2P_R0_POWER_ON_RESET, 0); ret = phy_meson_gxl_usb2_set_mode(phy, priv->mode, 0); if (ret) { phy_meson_gxl_usb2_power_off(phy); dev_err(&phy->dev, "Failed to initialize PHY with mode %d\n", priv->mode); return ret; } return 0; } static const struct phy_ops phy_meson_gxl_usb2_ops = { .init = phy_meson_gxl_usb2_init, .exit = phy_meson_gxl_usb2_exit, .power_on = phy_meson_gxl_usb2_power_on, .power_off = phy_meson_gxl_usb2_power_off, .set_mode = phy_meson_gxl_usb2_set_mode, .reset = phy_meson_gxl_usb2_reset, .owner = THIS_MODULE, }; static int phy_meson_gxl_usb2_probe(struct platform_device *pdev) { struct device *dev = &pdev->dev; struct phy_provider *phy_provider; struct resource *res; struct phy_meson_gxl_usb2_priv *priv; struct phy *phy; void __iomem *base; int ret; priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); if (!priv) return -ENOMEM; platform_set_drvdata(pdev, priv); res = platform_get_resource(pdev, IORESOURCE_MEM, 0); base = devm_ioremap_resource(dev, res); if (IS_ERR(base)) return PTR_ERR(base); /* start in host mode */ priv->mode = PHY_MODE_USB_HOST; priv->regmap = devm_regmap_init_mmio(dev, base, &phy_meson_gxl_usb2_regmap_conf); if (IS_ERR(priv->regmap)) return PTR_ERR(priv->regmap); priv->clk = devm_clk_get(dev, "phy"); if (IS_ERR(priv->clk)) { ret = PTR_ERR(priv->clk); if (ret == -ENOENT) priv->clk = NULL; else return ret; } priv->reset = devm_reset_control_get_optional_shared(dev, "phy"); if (IS_ERR(priv->reset)) return PTR_ERR(priv->reset); phy = devm_phy_create(dev, NULL, &phy_meson_gxl_usb2_ops); if (IS_ERR(phy)) { ret = PTR_ERR(phy); if (ret != -EPROBE_DEFER) dev_err(dev, "failed to create PHY\n"); return ret; } phy_set_drvdata(phy, priv); phy_provider = devm_of_phy_provider_register(dev, of_phy_simple_xlate); return PTR_ERR_OR_ZERO(phy_provider); } static const struct of_device_id phy_meson_gxl_usb2_of_match[] = { { .compatible = "amlogic,meson-gxl-usb2-phy", }, { }, }; MODULE_DEVICE_TABLE(of, phy_meson_gxl_usb2_of_match); static struct platform_driver phy_meson_gxl_usb2_driver = { .probe = phy_meson_gxl_usb2_probe, .driver = { .name = "phy-meson-gxl-usb2", .of_match_table = phy_meson_gxl_usb2_of_match, }, }; module_platform_driver(phy_meson_gxl_usb2_driver); MODULE_AUTHOR("Martin Blumenstingl <martin.blumenstingl@googlemail.com>"); MODULE_DESCRIPTION("Meson GXL and GXM USB2 PHY driver"); MODULE_LICENSE("GPL v2");
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