1c9999337SNeil Armstrong // SPDX-License-Identifier: GPL-2.0 2c9999337SNeil Armstrong /* 3c9999337SNeil Armstrong * USB Glue for Amlogic G12A SoCs 4c9999337SNeil Armstrong * 5c9999337SNeil Armstrong * Copyright (c) 2019 BayLibre, SAS 6c9999337SNeil Armstrong * Author: Neil Armstrong <narmstrong@baylibre.com> 7c9999337SNeil Armstrong */ 8c9999337SNeil Armstrong 9c9999337SNeil Armstrong /* 10c9999337SNeil Armstrong * The USB is organized with a glue around the DWC3 Controller IP as : 11c9999337SNeil Armstrong * - Control registers for each USB2 Ports 12c9999337SNeil Armstrong * - Control registers for the USB PHY layer 13c9999337SNeil Armstrong * - SuperSpeed PHY can be enabled only if port is used 14c9999337SNeil Armstrong * 15c9999337SNeil Armstrong * TOFIX: 16c9999337SNeil Armstrong * - Add dynamic OTG switching with ID change interrupt 17c9999337SNeil Armstrong */ 18c9999337SNeil Armstrong 19c9999337SNeil Armstrong #include <linux/module.h> 20c9999337SNeil Armstrong #include <linux/kernel.h> 21c9999337SNeil Armstrong #include <linux/platform_device.h> 22c9999337SNeil Armstrong #include <linux/clk.h> 23c9999337SNeil Armstrong #include <linux/of.h> 24c9999337SNeil Armstrong #include <linux/of_platform.h> 25c9999337SNeil Armstrong #include <linux/pm_runtime.h> 26c9999337SNeil Armstrong #include <linux/regmap.h> 27c9999337SNeil Armstrong #include <linux/bitfield.h> 28c9999337SNeil Armstrong #include <linux/bitops.h> 29c9999337SNeil Armstrong #include <linux/reset.h> 30c9999337SNeil Armstrong #include <linux/phy/phy.h> 31c9999337SNeil Armstrong #include <linux/usb/otg.h> 32c9999337SNeil Armstrong #include <linux/usb/role.h> 33c9999337SNeil Armstrong #include <linux/regulator/consumer.h> 34c9999337SNeil Armstrong 35c9999337SNeil Armstrong /* USB2 Ports Control Registers */ 36c9999337SNeil Armstrong 37c9999337SNeil Armstrong #define U2P_REG_SIZE 0x20 38c9999337SNeil Armstrong 39c9999337SNeil Armstrong #define U2P_R0 0x0 40c9999337SNeil Armstrong #define U2P_R0_HOST_DEVICE BIT(0) 41c9999337SNeil Armstrong #define U2P_R0_POWER_OK BIT(1) 42c9999337SNeil Armstrong #define U2P_R0_HAST_MODE BIT(2) 43c9999337SNeil Armstrong #define U2P_R0_POWER_ON_RESET BIT(3) 44c9999337SNeil Armstrong #define U2P_R0_ID_PULLUP BIT(4) 45c9999337SNeil Armstrong #define U2P_R0_DRV_VBUS BIT(5) 46c9999337SNeil Armstrong 47c9999337SNeil Armstrong #define U2P_R1 0x4 48c9999337SNeil Armstrong #define U2P_R1_PHY_READY BIT(0) 49c9999337SNeil Armstrong #define U2P_R1_ID_DIG BIT(1) 50c9999337SNeil Armstrong #define U2P_R1_OTG_SESSION_VALID BIT(2) 51c9999337SNeil Armstrong #define U2P_R1_VBUS_VALID BIT(3) 52c9999337SNeil Armstrong 53c9999337SNeil Armstrong /* USB Glue Control Registers */ 54c9999337SNeil Armstrong 55c9999337SNeil Armstrong #define USB_R0 0x80 56c9999337SNeil Armstrong #define USB_R0_P30_LANE0_TX2RX_LOOPBACK BIT(17) 57c9999337SNeil Armstrong #define USB_R0_P30_LANE0_EXT_PCLK_REQ BIT(18) 58c9999337SNeil Armstrong #define USB_R0_P30_PCS_RX_LOS_MASK_VAL_MASK GENMASK(28, 19) 59c9999337SNeil Armstrong #define USB_R0_U2D_SS_SCALEDOWN_MODE_MASK GENMASK(30, 29) 60c9999337SNeil Armstrong #define USB_R0_U2D_ACT BIT(31) 61c9999337SNeil Armstrong 62c9999337SNeil Armstrong #define USB_R1 0x84 63c9999337SNeil Armstrong #define USB_R1_U3H_BIGENDIAN_GS BIT(0) 64c9999337SNeil Armstrong #define USB_R1_U3H_PME_ENABLE BIT(1) 65c9999337SNeil Armstrong #define USB_R1_U3H_HUB_PORT_OVERCURRENT_MASK GENMASK(4, 2) 66c9999337SNeil Armstrong #define USB_R1_U3H_HUB_PORT_PERM_ATTACH_MASK GENMASK(9, 7) 67c9999337SNeil Armstrong #define USB_R1_U3H_HOST_U2_PORT_DISABLE_MASK GENMASK(13, 12) 68c9999337SNeil Armstrong #define USB_R1_U3H_HOST_U3_PORT_DISABLE BIT(16) 69c9999337SNeil Armstrong #define USB_R1_U3H_HOST_PORT_POWER_CONTROL_PRESENT BIT(17) 70c9999337SNeil Armstrong #define USB_R1_U3H_HOST_MSI_ENABLE BIT(18) 71c9999337SNeil Armstrong #define USB_R1_U3H_FLADJ_30MHZ_REG_MASK GENMASK(24, 19) 72c9999337SNeil Armstrong #define USB_R1_P30_PCS_TX_SWING_FULL_MASK GENMASK(31, 25) 73c9999337SNeil Armstrong 74c9999337SNeil Armstrong #define USB_R2 0x88 75c9999337SNeil Armstrong #define USB_R2_P30_PCS_TX_DEEMPH_3P5DB_MASK GENMASK(25, 20) 76c9999337SNeil Armstrong #define USB_R2_P30_PCS_TX_DEEMPH_6DB_MASK GENMASK(31, 26) 77c9999337SNeil Armstrong 78c9999337SNeil Armstrong #define USB_R3 0x8c 79c9999337SNeil Armstrong #define USB_R3_P30_SSC_ENABLE BIT(0) 80c9999337SNeil Armstrong #define USB_R3_P30_SSC_RANGE_MASK GENMASK(3, 1) 81c9999337SNeil Armstrong #define USB_R3_P30_SSC_REF_CLK_SEL_MASK GENMASK(12, 4) 82c9999337SNeil Armstrong #define USB_R3_P30_REF_SSP_EN BIT(13) 83c9999337SNeil Armstrong 84c9999337SNeil Armstrong #define USB_R4 0x90 85c9999337SNeil Armstrong #define USB_R4_P21_PORT_RESET_0 BIT(0) 86c9999337SNeil Armstrong #define USB_R4_P21_SLEEP_M0 BIT(1) 87c9999337SNeil Armstrong #define USB_R4_MEM_PD_MASK GENMASK(3, 2) 88c9999337SNeil Armstrong #define USB_R4_P21_ONLY BIT(4) 89c9999337SNeil Armstrong 90c9999337SNeil Armstrong #define USB_R5 0x94 91c9999337SNeil Armstrong #define USB_R5_ID_DIG_SYNC BIT(0) 92c9999337SNeil Armstrong #define USB_R5_ID_DIG_REG BIT(1) 93c9999337SNeil Armstrong #define USB_R5_ID_DIG_CFG_MASK GENMASK(3, 2) 94c9999337SNeil Armstrong #define USB_R5_ID_DIG_EN_0 BIT(4) 95c9999337SNeil Armstrong #define USB_R5_ID_DIG_EN_1 BIT(5) 96c9999337SNeil Armstrong #define USB_R5_ID_DIG_CURR BIT(6) 97c9999337SNeil Armstrong #define USB_R5_ID_DIG_IRQ BIT(7) 98c9999337SNeil Armstrong #define USB_R5_ID_DIG_TH_MASK GENMASK(15, 8) 99c9999337SNeil Armstrong #define USB_R5_ID_DIG_CNT_MASK GENMASK(23, 16) 100c9999337SNeil Armstrong 101c9999337SNeil Armstrong enum { 102c9999337SNeil Armstrong USB2_HOST_PHY = 0, 103c9999337SNeil Armstrong USB2_OTG_PHY, 104c9999337SNeil Armstrong USB3_HOST_PHY, 105c9999337SNeil Armstrong PHY_COUNT, 106c9999337SNeil Armstrong }; 107c9999337SNeil Armstrong 108c9999337SNeil Armstrong static const char *phy_names[PHY_COUNT] = { 109c9999337SNeil Armstrong "usb2-phy0", "usb2-phy1", "usb3-phy0", 110c9999337SNeil Armstrong }; 111c9999337SNeil Armstrong 112c9999337SNeil Armstrong struct dwc3_meson_g12a { 113c9999337SNeil Armstrong struct device *dev; 114c9999337SNeil Armstrong struct regmap *regmap; 115c9999337SNeil Armstrong struct clk *clk; 116c9999337SNeil Armstrong struct reset_control *reset; 117c9999337SNeil Armstrong struct phy *phys[PHY_COUNT]; 118c9999337SNeil Armstrong enum usb_dr_mode otg_mode; 119c9999337SNeil Armstrong enum phy_mode otg_phy_mode; 120c9999337SNeil Armstrong unsigned int usb2_ports; 121c9999337SNeil Armstrong unsigned int usb3_ports; 122c9999337SNeil Armstrong struct regulator *vbus; 123c9999337SNeil Armstrong struct usb_role_switch_desc switch_desc; 124c9999337SNeil Armstrong struct usb_role_switch *role_switch; 125c9999337SNeil Armstrong }; 126c9999337SNeil Armstrong 127c9999337SNeil Armstrong static void dwc3_meson_g12a_usb2_set_mode(struct dwc3_meson_g12a *priv, 128c9999337SNeil Armstrong int i, enum phy_mode mode) 129c9999337SNeil Armstrong { 130c9999337SNeil Armstrong if (mode == PHY_MODE_USB_HOST) 131c9999337SNeil Armstrong regmap_update_bits(priv->regmap, U2P_R0 + (U2P_REG_SIZE * i), 132c9999337SNeil Armstrong U2P_R0_HOST_DEVICE, 133c9999337SNeil Armstrong U2P_R0_HOST_DEVICE); 134c9999337SNeil Armstrong else 135c9999337SNeil Armstrong regmap_update_bits(priv->regmap, U2P_R0 + (U2P_REG_SIZE * i), 136c9999337SNeil Armstrong U2P_R0_HOST_DEVICE, 0); 137c9999337SNeil Armstrong } 138c9999337SNeil Armstrong 139c9999337SNeil Armstrong static int dwc3_meson_g12a_usb2_init(struct dwc3_meson_g12a *priv) 140c9999337SNeil Armstrong { 141c9999337SNeil Armstrong int i; 142c9999337SNeil Armstrong 143c9999337SNeil Armstrong if (priv->otg_mode == USB_DR_MODE_PERIPHERAL) 144c9999337SNeil Armstrong priv->otg_phy_mode = PHY_MODE_USB_DEVICE; 145c9999337SNeil Armstrong else 146c9999337SNeil Armstrong priv->otg_phy_mode = PHY_MODE_USB_HOST; 147c9999337SNeil Armstrong 148c9999337SNeil Armstrong for (i = 0 ; i < USB3_HOST_PHY ; ++i) { 149c9999337SNeil Armstrong if (!priv->phys[i]) 150c9999337SNeil Armstrong continue; 151c9999337SNeil Armstrong 152c9999337SNeil Armstrong regmap_update_bits(priv->regmap, U2P_R0 + (U2P_REG_SIZE * i), 153c9999337SNeil Armstrong U2P_R0_POWER_ON_RESET, 154c9999337SNeil Armstrong U2P_R0_POWER_ON_RESET); 155c9999337SNeil Armstrong 156c9999337SNeil Armstrong if (i == USB2_OTG_PHY) { 157c9999337SNeil Armstrong regmap_update_bits(priv->regmap, 158c9999337SNeil Armstrong U2P_R0 + (U2P_REG_SIZE * i), 159c9999337SNeil Armstrong U2P_R0_ID_PULLUP | U2P_R0_DRV_VBUS, 160c9999337SNeil Armstrong U2P_R0_ID_PULLUP | U2P_R0_DRV_VBUS); 161c9999337SNeil Armstrong 162c9999337SNeil Armstrong dwc3_meson_g12a_usb2_set_mode(priv, i, 163c9999337SNeil Armstrong priv->otg_phy_mode); 164c9999337SNeil Armstrong } else 165c9999337SNeil Armstrong dwc3_meson_g12a_usb2_set_mode(priv, i, 166c9999337SNeil Armstrong PHY_MODE_USB_HOST); 167c9999337SNeil Armstrong 168c9999337SNeil Armstrong regmap_update_bits(priv->regmap, U2P_R0 + (U2P_REG_SIZE * i), 169c9999337SNeil Armstrong U2P_R0_POWER_ON_RESET, 0); 170c9999337SNeil Armstrong } 171c9999337SNeil Armstrong 172c9999337SNeil Armstrong return 0; 173c9999337SNeil Armstrong } 174c9999337SNeil Armstrong 175c9999337SNeil Armstrong static void dwc3_meson_g12a_usb3_init(struct dwc3_meson_g12a *priv) 176c9999337SNeil Armstrong { 177c9999337SNeil Armstrong regmap_update_bits(priv->regmap, USB_R3, 178c9999337SNeil Armstrong USB_R3_P30_SSC_RANGE_MASK | 179c9999337SNeil Armstrong USB_R3_P30_REF_SSP_EN, 180c9999337SNeil Armstrong USB_R3_P30_SSC_ENABLE | 181c9999337SNeil Armstrong FIELD_PREP(USB_R3_P30_SSC_RANGE_MASK, 2) | 182c9999337SNeil Armstrong USB_R3_P30_REF_SSP_EN); 183c9999337SNeil Armstrong udelay(2); 184c9999337SNeil Armstrong 185c9999337SNeil Armstrong regmap_update_bits(priv->regmap, USB_R2, 186c9999337SNeil Armstrong USB_R2_P30_PCS_TX_DEEMPH_3P5DB_MASK, 187c9999337SNeil Armstrong FIELD_PREP(USB_R2_P30_PCS_TX_DEEMPH_3P5DB_MASK, 0x15)); 188c9999337SNeil Armstrong 189c9999337SNeil Armstrong regmap_update_bits(priv->regmap, USB_R2, 190c9999337SNeil Armstrong USB_R2_P30_PCS_TX_DEEMPH_6DB_MASK, 191c9999337SNeil Armstrong FIELD_PREP(USB_R2_P30_PCS_TX_DEEMPH_6DB_MASK, 0x20)); 192c9999337SNeil Armstrong 193c9999337SNeil Armstrong udelay(2); 194c9999337SNeil Armstrong 195c9999337SNeil Armstrong regmap_update_bits(priv->regmap, USB_R1, 196c9999337SNeil Armstrong USB_R1_U3H_HOST_PORT_POWER_CONTROL_PRESENT, 197c9999337SNeil Armstrong USB_R1_U3H_HOST_PORT_POWER_CONTROL_PRESENT); 198c9999337SNeil Armstrong 199c9999337SNeil Armstrong regmap_update_bits(priv->regmap, USB_R1, 200c9999337SNeil Armstrong USB_R1_P30_PCS_TX_SWING_FULL_MASK, 201c9999337SNeil Armstrong FIELD_PREP(USB_R1_P30_PCS_TX_SWING_FULL_MASK, 127)); 202c9999337SNeil Armstrong } 203c9999337SNeil Armstrong 204c9999337SNeil Armstrong static void dwc3_meson_g12a_usb_otg_apply_mode(struct dwc3_meson_g12a *priv) 205c9999337SNeil Armstrong { 206c9999337SNeil Armstrong if (priv->otg_phy_mode == PHY_MODE_USB_DEVICE) { 207c9999337SNeil Armstrong regmap_update_bits(priv->regmap, USB_R0, 208c9999337SNeil Armstrong USB_R0_U2D_ACT, USB_R0_U2D_ACT); 209c9999337SNeil Armstrong regmap_update_bits(priv->regmap, USB_R0, 210c9999337SNeil Armstrong USB_R0_U2D_SS_SCALEDOWN_MODE_MASK, 0); 211c9999337SNeil Armstrong regmap_update_bits(priv->regmap, USB_R4, 212c9999337SNeil Armstrong USB_R4_P21_SLEEP_M0, USB_R4_P21_SLEEP_M0); 213c9999337SNeil Armstrong } else { 214c9999337SNeil Armstrong regmap_update_bits(priv->regmap, USB_R0, 215c9999337SNeil Armstrong USB_R0_U2D_ACT, 0); 216c9999337SNeil Armstrong regmap_update_bits(priv->regmap, USB_R4, 217c9999337SNeil Armstrong USB_R4_P21_SLEEP_M0, 0); 218c9999337SNeil Armstrong } 219c9999337SNeil Armstrong } 220c9999337SNeil Armstrong 221c9999337SNeil Armstrong static int dwc3_meson_g12a_usb_init(struct dwc3_meson_g12a *priv) 222c9999337SNeil Armstrong { 223c9999337SNeil Armstrong int ret; 224c9999337SNeil Armstrong 225c9999337SNeil Armstrong ret = dwc3_meson_g12a_usb2_init(priv); 226c9999337SNeil Armstrong if (ret) 227c9999337SNeil Armstrong return ret; 228c9999337SNeil Armstrong 229c9999337SNeil Armstrong regmap_update_bits(priv->regmap, USB_R1, 230c9999337SNeil Armstrong USB_R1_U3H_FLADJ_30MHZ_REG_MASK, 231c9999337SNeil Armstrong FIELD_PREP(USB_R1_U3H_FLADJ_30MHZ_REG_MASK, 0x20)); 232c9999337SNeil Armstrong 233c9999337SNeil Armstrong regmap_update_bits(priv->regmap, USB_R5, 234c9999337SNeil Armstrong USB_R5_ID_DIG_EN_0, 235c9999337SNeil Armstrong USB_R5_ID_DIG_EN_0); 236c9999337SNeil Armstrong regmap_update_bits(priv->regmap, USB_R5, 237c9999337SNeil Armstrong USB_R5_ID_DIG_EN_1, 238c9999337SNeil Armstrong USB_R5_ID_DIG_EN_1); 239c9999337SNeil Armstrong regmap_update_bits(priv->regmap, USB_R5, 240c9999337SNeil Armstrong USB_R5_ID_DIG_TH_MASK, 241c9999337SNeil Armstrong FIELD_PREP(USB_R5_ID_DIG_TH_MASK, 0xff)); 242c9999337SNeil Armstrong 243c9999337SNeil Armstrong /* If we have an actual SuperSpeed port, initialize it */ 244c9999337SNeil Armstrong if (priv->usb3_ports) 245c9999337SNeil Armstrong dwc3_meson_g12a_usb3_init(priv); 246c9999337SNeil Armstrong 247c9999337SNeil Armstrong dwc3_meson_g12a_usb_otg_apply_mode(priv); 248c9999337SNeil Armstrong 249c9999337SNeil Armstrong return 0; 250c9999337SNeil Armstrong } 251c9999337SNeil Armstrong 252c9999337SNeil Armstrong static const struct regmap_config phy_meson_g12a_usb3_regmap_conf = { 253c9999337SNeil Armstrong .reg_bits = 8, 254c9999337SNeil Armstrong .val_bits = 32, 255c9999337SNeil Armstrong .reg_stride = 4, 256c9999337SNeil Armstrong .max_register = USB_R5, 257c9999337SNeil Armstrong }; 258c9999337SNeil Armstrong 259c9999337SNeil Armstrong static int dwc3_meson_g12a_get_phys(struct dwc3_meson_g12a *priv) 260c9999337SNeil Armstrong { 261c9999337SNeil Armstrong int i; 262c9999337SNeil Armstrong 263c9999337SNeil Armstrong for (i = 0 ; i < PHY_COUNT ; ++i) { 264c9999337SNeil Armstrong priv->phys[i] = devm_phy_optional_get(priv->dev, phy_names[i]); 265c9999337SNeil Armstrong if (!priv->phys[i]) 266c9999337SNeil Armstrong continue; 267c9999337SNeil Armstrong 268c9999337SNeil Armstrong if (IS_ERR(priv->phys[i])) 269c9999337SNeil Armstrong return PTR_ERR(priv->phys[i]); 270c9999337SNeil Armstrong 271c9999337SNeil Armstrong if (i == USB3_HOST_PHY) 272c9999337SNeil Armstrong priv->usb3_ports++; 273c9999337SNeil Armstrong else 274c9999337SNeil Armstrong priv->usb2_ports++; 275c9999337SNeil Armstrong } 276c9999337SNeil Armstrong 277c9999337SNeil Armstrong dev_info(priv->dev, "USB2 ports: %d\n", priv->usb2_ports); 278c9999337SNeil Armstrong dev_info(priv->dev, "USB3 ports: %d\n", priv->usb3_ports); 279c9999337SNeil Armstrong 280c9999337SNeil Armstrong return 0; 281c9999337SNeil Armstrong } 282c9999337SNeil Armstrong 283c9999337SNeil Armstrong static enum phy_mode dwc3_meson_g12a_get_id(struct dwc3_meson_g12a *priv) 284c9999337SNeil Armstrong { 285c9999337SNeil Armstrong u32 reg; 286c9999337SNeil Armstrong 287c9999337SNeil Armstrong regmap_read(priv->regmap, USB_R5, ®); 288c9999337SNeil Armstrong 289c9999337SNeil Armstrong if (reg & (USB_R5_ID_DIG_SYNC | USB_R5_ID_DIG_REG)) 290c9999337SNeil Armstrong return PHY_MODE_USB_DEVICE; 291c9999337SNeil Armstrong 292c9999337SNeil Armstrong return PHY_MODE_USB_HOST; 293c9999337SNeil Armstrong } 294c9999337SNeil Armstrong 295c9999337SNeil Armstrong static int dwc3_meson_g12a_otg_mode_set(struct dwc3_meson_g12a *priv, 296c9999337SNeil Armstrong enum phy_mode mode) 297c9999337SNeil Armstrong { 298c9999337SNeil Armstrong int ret; 299c9999337SNeil Armstrong 300c9999337SNeil Armstrong if (!priv->phys[USB2_OTG_PHY]) 301c9999337SNeil Armstrong return -EINVAL; 302c9999337SNeil Armstrong 303c9999337SNeil Armstrong if (mode == PHY_MODE_USB_HOST) 304c9999337SNeil Armstrong dev_info(priv->dev, "switching to Host Mode\n"); 305c9999337SNeil Armstrong else 306c9999337SNeil Armstrong dev_info(priv->dev, "switching to Device Mode\n"); 307c9999337SNeil Armstrong 308c9999337SNeil Armstrong if (priv->vbus) { 309c9999337SNeil Armstrong if (mode == PHY_MODE_USB_DEVICE) 310c9999337SNeil Armstrong ret = regulator_disable(priv->vbus); 311c9999337SNeil Armstrong else 312c9999337SNeil Armstrong ret = regulator_enable(priv->vbus); 313c9999337SNeil Armstrong if (ret) 314c9999337SNeil Armstrong return ret; 315c9999337SNeil Armstrong } 316c9999337SNeil Armstrong 317c9999337SNeil Armstrong priv->otg_phy_mode = mode; 318c9999337SNeil Armstrong 319c9999337SNeil Armstrong dwc3_meson_g12a_usb2_set_mode(priv, USB2_OTG_PHY, mode); 320c9999337SNeil Armstrong 321c9999337SNeil Armstrong dwc3_meson_g12a_usb_otg_apply_mode(priv); 322c9999337SNeil Armstrong 323c9999337SNeil Armstrong return 0; 324c9999337SNeil Armstrong } 325c9999337SNeil Armstrong 326c9999337SNeil Armstrong static int dwc3_meson_g12a_role_set(struct device *dev, enum usb_role role) 327c9999337SNeil Armstrong { 328c9999337SNeil Armstrong struct dwc3_meson_g12a *priv = dev_get_drvdata(dev); 329c9999337SNeil Armstrong enum phy_mode mode; 330c9999337SNeil Armstrong 331c9999337SNeil Armstrong if (role == USB_ROLE_NONE) 332c9999337SNeil Armstrong return 0; 333c9999337SNeil Armstrong 334c9999337SNeil Armstrong mode = (role == USB_ROLE_HOST) ? PHY_MODE_USB_HOST 335c9999337SNeil Armstrong : PHY_MODE_USB_DEVICE; 336c9999337SNeil Armstrong 337c9999337SNeil Armstrong if (mode == priv->otg_phy_mode) 338c9999337SNeil Armstrong return 0; 339c9999337SNeil Armstrong 340c9999337SNeil Armstrong return dwc3_meson_g12a_otg_mode_set(priv, mode); 341c9999337SNeil Armstrong } 342c9999337SNeil Armstrong 343c9999337SNeil Armstrong static enum usb_role dwc3_meson_g12a_role_get(struct device *dev) 344c9999337SNeil Armstrong { 345c9999337SNeil Armstrong struct dwc3_meson_g12a *priv = dev_get_drvdata(dev); 346c9999337SNeil Armstrong 347c9999337SNeil Armstrong return priv->otg_phy_mode == PHY_MODE_USB_HOST ? 348c9999337SNeil Armstrong USB_ROLE_HOST : USB_ROLE_DEVICE; 349c9999337SNeil Armstrong } 350c9999337SNeil Armstrong 351c9999337SNeil Armstrong static struct device *dwc3_meson_g12_find_child(struct device *dev, 352c9999337SNeil Armstrong const char *compatible) 353c9999337SNeil Armstrong { 354c9999337SNeil Armstrong struct platform_device *pdev; 355c9999337SNeil Armstrong struct device_node *np; 356c9999337SNeil Armstrong 357c9999337SNeil Armstrong np = of_get_compatible_child(dev->of_node, compatible); 358c9999337SNeil Armstrong if (!np) 359c9999337SNeil Armstrong return NULL; 360c9999337SNeil Armstrong 361c9999337SNeil Armstrong pdev = of_find_device_by_node(np); 362c9999337SNeil Armstrong of_node_put(np); 363c9999337SNeil Armstrong if (!pdev) 364c9999337SNeil Armstrong return NULL; 365c9999337SNeil Armstrong 366c9999337SNeil Armstrong return &pdev->dev; 367c9999337SNeil Armstrong } 368c9999337SNeil Armstrong 369c9999337SNeil Armstrong static int dwc3_meson_g12a_probe(struct platform_device *pdev) 370c9999337SNeil Armstrong { 371c9999337SNeil Armstrong struct dwc3_meson_g12a *priv; 372c9999337SNeil Armstrong struct device *dev = &pdev->dev; 373c9999337SNeil Armstrong struct device_node *np = dev->of_node; 374c9999337SNeil Armstrong void __iomem *base; 375c9999337SNeil Armstrong struct resource *res; 376c9999337SNeil Armstrong enum phy_mode otg_id; 377c9999337SNeil Armstrong int ret, i; 378c9999337SNeil Armstrong 379c9999337SNeil Armstrong priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); 380c9999337SNeil Armstrong if (!priv) 381c9999337SNeil Armstrong return -ENOMEM; 382c9999337SNeil Armstrong 383c9999337SNeil Armstrong res = platform_get_resource(pdev, IORESOURCE_MEM, 0); 384c9999337SNeil Armstrong base = devm_ioremap_resource(dev, res); 385c9999337SNeil Armstrong if (IS_ERR(base)) 386c9999337SNeil Armstrong return PTR_ERR(base); 387c9999337SNeil Armstrong 388c9999337SNeil Armstrong priv->regmap = devm_regmap_init_mmio(dev, base, 389c9999337SNeil Armstrong &phy_meson_g12a_usb3_regmap_conf); 390c9999337SNeil Armstrong if (IS_ERR(priv->regmap)) 391c9999337SNeil Armstrong return PTR_ERR(priv->regmap); 392c9999337SNeil Armstrong 393c9999337SNeil Armstrong priv->vbus = devm_regulator_get_optional(dev, "vbus"); 394c9999337SNeil Armstrong if (IS_ERR(priv->vbus)) { 395c9999337SNeil Armstrong if (PTR_ERR(priv->vbus) == -EPROBE_DEFER) 396c9999337SNeil Armstrong return PTR_ERR(priv->vbus); 397c9999337SNeil Armstrong priv->vbus = NULL; 398c9999337SNeil Armstrong } 399c9999337SNeil Armstrong 400c9999337SNeil Armstrong priv->clk = devm_clk_get(dev, NULL); 401c9999337SNeil Armstrong if (IS_ERR(priv->clk)) 402c9999337SNeil Armstrong return PTR_ERR(priv->clk); 403c9999337SNeil Armstrong 404c9999337SNeil Armstrong ret = clk_prepare_enable(priv->clk); 405c9999337SNeil Armstrong if (ret) 406c9999337SNeil Armstrong return ret; 407c9999337SNeil Armstrong 408c9999337SNeil Armstrong devm_add_action_or_reset(dev, 409c9999337SNeil Armstrong (void(*)(void *))clk_disable_unprepare, 410c9999337SNeil Armstrong priv->clk); 411c9999337SNeil Armstrong 412c9999337SNeil Armstrong platform_set_drvdata(pdev, priv); 413c9999337SNeil Armstrong priv->dev = dev; 414c9999337SNeil Armstrong 415c9999337SNeil Armstrong priv->reset = devm_reset_control_get(dev, NULL); 416c9999337SNeil Armstrong if (IS_ERR(priv->reset)) { 417c9999337SNeil Armstrong ret = PTR_ERR(priv->reset); 418c9999337SNeil Armstrong dev_err(dev, "failed to get device reset, err=%d\n", ret); 419c9999337SNeil Armstrong return ret; 420c9999337SNeil Armstrong } 421c9999337SNeil Armstrong 422c9999337SNeil Armstrong ret = reset_control_reset(priv->reset); 423c9999337SNeil Armstrong if (ret) 424c9999337SNeil Armstrong return ret; 425c9999337SNeil Armstrong 426c9999337SNeil Armstrong ret = dwc3_meson_g12a_get_phys(priv); 427c9999337SNeil Armstrong if (ret) 428c9999337SNeil Armstrong return ret; 429c9999337SNeil Armstrong 430c9999337SNeil Armstrong if (priv->vbus) { 431c9999337SNeil Armstrong ret = regulator_enable(priv->vbus); 432c9999337SNeil Armstrong if (ret) 433c9999337SNeil Armstrong return ret; 434c9999337SNeil Armstrong } 435c9999337SNeil Armstrong 436c9999337SNeil Armstrong /* Get dr_mode */ 437c9999337SNeil Armstrong priv->otg_mode = usb_get_dr_mode(dev); 438c9999337SNeil Armstrong 439c9999337SNeil Armstrong dwc3_meson_g12a_usb_init(priv); 440c9999337SNeil Armstrong 441c9999337SNeil Armstrong /* Init PHYs */ 442c9999337SNeil Armstrong for (i = 0 ; i < PHY_COUNT ; ++i) { 443c9999337SNeil Armstrong ret = phy_init(priv->phys[i]); 444c9999337SNeil Armstrong if (ret) 445c9999337SNeil Armstrong return ret; 446c9999337SNeil Armstrong } 447c9999337SNeil Armstrong 448c9999337SNeil Armstrong /* Set PHY Power */ 449c9999337SNeil Armstrong for (i = 0 ; i < PHY_COUNT ; ++i) { 450c9999337SNeil Armstrong ret = phy_power_on(priv->phys[i]); 451c9999337SNeil Armstrong if (ret) 452c9999337SNeil Armstrong goto err_phys_exit; 453c9999337SNeil Armstrong } 454c9999337SNeil Armstrong 455c9999337SNeil Armstrong ret = of_platform_populate(np, NULL, NULL, dev); 456c9999337SNeil Armstrong if (ret) { 457c9999337SNeil Armstrong clk_disable_unprepare(priv->clk); 458c9999337SNeil Armstrong goto err_phys_power; 459c9999337SNeil Armstrong } 460c9999337SNeil Armstrong 461c9999337SNeil Armstrong /* Setup OTG mode corresponding to the ID pin */ 462c9999337SNeil Armstrong if (priv->otg_mode == USB_DR_MODE_OTG) { 463c9999337SNeil Armstrong /* TOFIX Handle ID mode toggling via IRQ */ 464c9999337SNeil Armstrong otg_id = dwc3_meson_g12a_get_id(priv); 465c9999337SNeil Armstrong if (otg_id != priv->otg_phy_mode) { 466c9999337SNeil Armstrong if (dwc3_meson_g12a_otg_mode_set(priv, otg_id)) 467c9999337SNeil Armstrong dev_warn(dev, "Failed to switch OTG mode\n"); 468c9999337SNeil Armstrong } 469c9999337SNeil Armstrong } 470c9999337SNeil Armstrong 471c9999337SNeil Armstrong /* Setup role switcher */ 472c9999337SNeil Armstrong priv->switch_desc.usb2_port = dwc3_meson_g12_find_child(dev, 473c9999337SNeil Armstrong "snps,dwc3"); 474c9999337SNeil Armstrong priv->switch_desc.udc = dwc3_meson_g12_find_child(dev, "snps,dwc2"); 475c9999337SNeil Armstrong priv->switch_desc.allow_userspace_control = true; 476c9999337SNeil Armstrong priv->switch_desc.set = dwc3_meson_g12a_role_set; 477c9999337SNeil Armstrong priv->switch_desc.get = dwc3_meson_g12a_role_get; 478c9999337SNeil Armstrong 479c9999337SNeil Armstrong priv->role_switch = usb_role_switch_register(dev, &priv->switch_desc); 480c9999337SNeil Armstrong if (IS_ERR(priv->role_switch)) 481c9999337SNeil Armstrong dev_warn(dev, "Unable to register Role Switch\n"); 482c9999337SNeil Armstrong 483c9999337SNeil Armstrong pm_runtime_set_active(dev); 484c9999337SNeil Armstrong pm_runtime_enable(dev); 485c9999337SNeil Armstrong pm_runtime_get_sync(dev); 486c9999337SNeil Armstrong 487c9999337SNeil Armstrong return 0; 488c9999337SNeil Armstrong 489c9999337SNeil Armstrong err_phys_power: 490c9999337SNeil Armstrong for (i = 0 ; i < PHY_COUNT ; ++i) 491c9999337SNeil Armstrong phy_power_off(priv->phys[i]); 492c9999337SNeil Armstrong 493c9999337SNeil Armstrong err_phys_exit: 494c9999337SNeil Armstrong for (i = 0 ; i < PHY_COUNT ; ++i) 495c9999337SNeil Armstrong phy_exit(priv->phys[i]); 496c9999337SNeil Armstrong 497c9999337SNeil Armstrong return ret; 498c9999337SNeil Armstrong } 499c9999337SNeil Armstrong 500c9999337SNeil Armstrong static int dwc3_meson_g12a_remove(struct platform_device *pdev) 501c9999337SNeil Armstrong { 502c9999337SNeil Armstrong struct dwc3_meson_g12a *priv = platform_get_drvdata(pdev); 503c9999337SNeil Armstrong struct device *dev = &pdev->dev; 504c9999337SNeil Armstrong int i; 505c9999337SNeil Armstrong 506c9999337SNeil Armstrong usb_role_switch_unregister(priv->role_switch); 507c9999337SNeil Armstrong 508c9999337SNeil Armstrong of_platform_depopulate(dev); 509c9999337SNeil Armstrong 510c9999337SNeil Armstrong for (i = 0 ; i < PHY_COUNT ; ++i) { 511c9999337SNeil Armstrong phy_power_off(priv->phys[i]); 512c9999337SNeil Armstrong phy_exit(priv->phys[i]); 513c9999337SNeil Armstrong } 514c9999337SNeil Armstrong 515c9999337SNeil Armstrong pm_runtime_disable(dev); 516c9999337SNeil Armstrong pm_runtime_put_noidle(dev); 517c9999337SNeil Armstrong pm_runtime_set_suspended(dev); 518c9999337SNeil Armstrong 519c9999337SNeil Armstrong return 0; 520c9999337SNeil Armstrong } 521c9999337SNeil Armstrong 522c9999337SNeil Armstrong static int __maybe_unused dwc3_meson_g12a_runtime_suspend(struct device *dev) 523c9999337SNeil Armstrong { 524c9999337SNeil Armstrong struct dwc3_meson_g12a *priv = dev_get_drvdata(dev); 525c9999337SNeil Armstrong 526c9999337SNeil Armstrong clk_disable(priv->clk); 527c9999337SNeil Armstrong 528c9999337SNeil Armstrong return 0; 529c9999337SNeil Armstrong } 530c9999337SNeil Armstrong 531c9999337SNeil Armstrong static int __maybe_unused dwc3_meson_g12a_runtime_resume(struct device *dev) 532c9999337SNeil Armstrong { 533c9999337SNeil Armstrong struct dwc3_meson_g12a *priv = dev_get_drvdata(dev); 534c9999337SNeil Armstrong 535c9999337SNeil Armstrong return clk_enable(priv->clk); 536c9999337SNeil Armstrong } 537c9999337SNeil Armstrong 538c9999337SNeil Armstrong static int __maybe_unused dwc3_meson_g12a_suspend(struct device *dev) 539c9999337SNeil Armstrong { 540c9999337SNeil Armstrong struct dwc3_meson_g12a *priv = dev_get_drvdata(dev); 541c9999337SNeil Armstrong int i; 542c9999337SNeil Armstrong 543c9999337SNeil Armstrong for (i = 0 ; i < PHY_COUNT ; ++i) { 544c9999337SNeil Armstrong phy_power_off(priv->phys[i]); 545c9999337SNeil Armstrong phy_exit(priv->phys[i]); 546c9999337SNeil Armstrong } 547c9999337SNeil Armstrong 548c9999337SNeil Armstrong reset_control_assert(priv->reset); 549c9999337SNeil Armstrong 550c9999337SNeil Armstrong return 0; 551c9999337SNeil Armstrong } 552c9999337SNeil Armstrong 553c9999337SNeil Armstrong static int __maybe_unused dwc3_meson_g12a_resume(struct device *dev) 554c9999337SNeil Armstrong { 555c9999337SNeil Armstrong struct dwc3_meson_g12a *priv = dev_get_drvdata(dev); 556c9999337SNeil Armstrong int i, ret; 557c9999337SNeil Armstrong 558c9999337SNeil Armstrong reset_control_deassert(priv->reset); 559c9999337SNeil Armstrong 560c9999337SNeil Armstrong dwc3_meson_g12a_usb_init(priv); 561c9999337SNeil Armstrong 562c9999337SNeil Armstrong /* Init PHYs */ 563c9999337SNeil Armstrong for (i = 0 ; i < PHY_COUNT ; ++i) { 564c9999337SNeil Armstrong ret = phy_init(priv->phys[i]); 565c9999337SNeil Armstrong if (ret) 566c9999337SNeil Armstrong return ret; 567c9999337SNeil Armstrong } 568c9999337SNeil Armstrong 569c9999337SNeil Armstrong /* Set PHY Power */ 570c9999337SNeil Armstrong for (i = 0 ; i < PHY_COUNT ; ++i) { 571c9999337SNeil Armstrong ret = phy_power_on(priv->phys[i]); 572c9999337SNeil Armstrong if (ret) 573c9999337SNeil Armstrong return ret; 574c9999337SNeil Armstrong } 575c9999337SNeil Armstrong 576c9999337SNeil Armstrong return 0; 577c9999337SNeil Armstrong } 578c9999337SNeil Armstrong 579c9999337SNeil Armstrong static const struct dev_pm_ops dwc3_meson_g12a_dev_pm_ops = { 580c9999337SNeil Armstrong SET_SYSTEM_SLEEP_PM_OPS(dwc3_meson_g12a_suspend, dwc3_meson_g12a_resume) 581c9999337SNeil Armstrong SET_RUNTIME_PM_OPS(dwc3_meson_g12a_runtime_suspend, 582c9999337SNeil Armstrong dwc3_meson_g12a_runtime_resume, NULL) 583c9999337SNeil Armstrong }; 584c9999337SNeil Armstrong 585c9999337SNeil Armstrong static const struct of_device_id dwc3_meson_g12a_match[] = { 586c9999337SNeil Armstrong { .compatible = "amlogic,meson-g12a-usb-ctrl" }, 587c9999337SNeil Armstrong { /* Sentinel */ } 588c9999337SNeil Armstrong }; 589c9999337SNeil Armstrong MODULE_DEVICE_TABLE(of, dwc3_meson_g12a_match); 590c9999337SNeil Armstrong 591c9999337SNeil Armstrong static struct platform_driver dwc3_meson_g12a_driver = { 592c9999337SNeil Armstrong .probe = dwc3_meson_g12a_probe, 593c9999337SNeil Armstrong .remove = dwc3_meson_g12a_remove, 594c9999337SNeil Armstrong .driver = { 595c9999337SNeil Armstrong .name = "dwc3-meson-g12a", 596c9999337SNeil Armstrong .of_match_table = dwc3_meson_g12a_match, 597c9999337SNeil Armstrong .pm = &dwc3_meson_g12a_dev_pm_ops, 598c9999337SNeil Armstrong }, 599c9999337SNeil Armstrong }; 600c9999337SNeil Armstrong 601c9999337SNeil Armstrong module_platform_driver(dwc3_meson_g12a_driver); 602c9999337SNeil Armstrong MODULE_LICENSE("GPL v2"); 603c9999337SNeil Armstrong MODULE_DESCRIPTION("Amlogic Meson G12A USB Glue Layer"); 604c9999337SNeil Armstrong MODULE_AUTHOR("Neil Armstrong <narmstrong@baylibre.com>"); 605