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 14f90db107SNeil Armstrong * - Dynamic OTG switching with ID change interrupt 15c9999337SNeil Armstrong */ 16c9999337SNeil Armstrong 17c9999337SNeil Armstrong #include <linux/module.h> 18c9999337SNeil Armstrong #include <linux/kernel.h> 19c9999337SNeil Armstrong #include <linux/platform_device.h> 20c9999337SNeil Armstrong #include <linux/clk.h> 21c9999337SNeil Armstrong #include <linux/of.h> 22c9999337SNeil Armstrong #include <linux/of_platform.h> 23c9999337SNeil Armstrong #include <linux/pm_runtime.h> 24c9999337SNeil Armstrong #include <linux/regmap.h> 25c9999337SNeil Armstrong #include <linux/bitfield.h> 26c9999337SNeil Armstrong #include <linux/bitops.h> 27c9999337SNeil Armstrong #include <linux/reset.h> 28c9999337SNeil Armstrong #include <linux/phy/phy.h> 29c9999337SNeil Armstrong #include <linux/usb/otg.h> 30c9999337SNeil Armstrong #include <linux/usb/role.h> 31c9999337SNeil Armstrong #include <linux/regulator/consumer.h> 32c9999337SNeil Armstrong 33c9999337SNeil Armstrong /* USB2 Ports Control Registers */ 34c9999337SNeil Armstrong 35c9999337SNeil Armstrong #define U2P_REG_SIZE 0x20 36c9999337SNeil Armstrong 37c9999337SNeil Armstrong #define U2P_R0 0x0 38c9999337SNeil Armstrong #define U2P_R0_HOST_DEVICE BIT(0) 39c9999337SNeil Armstrong #define U2P_R0_POWER_OK BIT(1) 40c9999337SNeil Armstrong #define U2P_R0_HAST_MODE BIT(2) 41c9999337SNeil Armstrong #define U2P_R0_POWER_ON_RESET BIT(3) 42c9999337SNeil Armstrong #define U2P_R0_ID_PULLUP BIT(4) 43c9999337SNeil Armstrong #define U2P_R0_DRV_VBUS BIT(5) 44c9999337SNeil Armstrong 45c9999337SNeil Armstrong #define U2P_R1 0x4 46c9999337SNeil Armstrong #define U2P_R1_PHY_READY BIT(0) 47c9999337SNeil Armstrong #define U2P_R1_ID_DIG BIT(1) 48c9999337SNeil Armstrong #define U2P_R1_OTG_SESSION_VALID BIT(2) 49c9999337SNeil Armstrong #define U2P_R1_VBUS_VALID BIT(3) 50c9999337SNeil Armstrong 51c9999337SNeil Armstrong /* USB Glue Control Registers */ 52c9999337SNeil Armstrong 53c9999337SNeil Armstrong #define USB_R0 0x80 54c9999337SNeil Armstrong #define USB_R0_P30_LANE0_TX2RX_LOOPBACK BIT(17) 55c9999337SNeil Armstrong #define USB_R0_P30_LANE0_EXT_PCLK_REQ BIT(18) 56c9999337SNeil Armstrong #define USB_R0_P30_PCS_RX_LOS_MASK_VAL_MASK GENMASK(28, 19) 57c9999337SNeil Armstrong #define USB_R0_U2D_SS_SCALEDOWN_MODE_MASK GENMASK(30, 29) 58c9999337SNeil Armstrong #define USB_R0_U2D_ACT BIT(31) 59c9999337SNeil Armstrong 60c9999337SNeil Armstrong #define USB_R1 0x84 61c9999337SNeil Armstrong #define USB_R1_U3H_BIGENDIAN_GS BIT(0) 62c9999337SNeil Armstrong #define USB_R1_U3H_PME_ENABLE BIT(1) 63c9999337SNeil Armstrong #define USB_R1_U3H_HUB_PORT_OVERCURRENT_MASK GENMASK(4, 2) 64c9999337SNeil Armstrong #define USB_R1_U3H_HUB_PORT_PERM_ATTACH_MASK GENMASK(9, 7) 65c9999337SNeil Armstrong #define USB_R1_U3H_HOST_U2_PORT_DISABLE_MASK GENMASK(13, 12) 66c9999337SNeil Armstrong #define USB_R1_U3H_HOST_U3_PORT_DISABLE BIT(16) 67c9999337SNeil Armstrong #define USB_R1_U3H_HOST_PORT_POWER_CONTROL_PRESENT BIT(17) 68c9999337SNeil Armstrong #define USB_R1_U3H_HOST_MSI_ENABLE BIT(18) 69c9999337SNeil Armstrong #define USB_R1_U3H_FLADJ_30MHZ_REG_MASK GENMASK(24, 19) 70c9999337SNeil Armstrong #define USB_R1_P30_PCS_TX_SWING_FULL_MASK GENMASK(31, 25) 71c9999337SNeil Armstrong 72c9999337SNeil Armstrong #define USB_R2 0x88 73c9999337SNeil Armstrong #define USB_R2_P30_PCS_TX_DEEMPH_3P5DB_MASK GENMASK(25, 20) 74c9999337SNeil Armstrong #define USB_R2_P30_PCS_TX_DEEMPH_6DB_MASK GENMASK(31, 26) 75c9999337SNeil Armstrong 76c9999337SNeil Armstrong #define USB_R3 0x8c 77c9999337SNeil Armstrong #define USB_R3_P30_SSC_ENABLE BIT(0) 78c9999337SNeil Armstrong #define USB_R3_P30_SSC_RANGE_MASK GENMASK(3, 1) 79c9999337SNeil Armstrong #define USB_R3_P30_SSC_REF_CLK_SEL_MASK GENMASK(12, 4) 80c9999337SNeil Armstrong #define USB_R3_P30_REF_SSP_EN BIT(13) 81c9999337SNeil Armstrong 82c9999337SNeil Armstrong #define USB_R4 0x90 83c9999337SNeil Armstrong #define USB_R4_P21_PORT_RESET_0 BIT(0) 84c9999337SNeil Armstrong #define USB_R4_P21_SLEEP_M0 BIT(1) 85c9999337SNeil Armstrong #define USB_R4_MEM_PD_MASK GENMASK(3, 2) 86c9999337SNeil Armstrong #define USB_R4_P21_ONLY BIT(4) 87c9999337SNeil Armstrong 88c9999337SNeil Armstrong #define USB_R5 0x94 89c9999337SNeil Armstrong #define USB_R5_ID_DIG_SYNC BIT(0) 90c9999337SNeil Armstrong #define USB_R5_ID_DIG_REG BIT(1) 91c9999337SNeil Armstrong #define USB_R5_ID_DIG_CFG_MASK GENMASK(3, 2) 92c9999337SNeil Armstrong #define USB_R5_ID_DIG_EN_0 BIT(4) 93c9999337SNeil Armstrong #define USB_R5_ID_DIG_EN_1 BIT(5) 94c9999337SNeil Armstrong #define USB_R5_ID_DIG_CURR BIT(6) 95c9999337SNeil Armstrong #define USB_R5_ID_DIG_IRQ BIT(7) 96c9999337SNeil Armstrong #define USB_R5_ID_DIG_TH_MASK GENMASK(15, 8) 97c9999337SNeil Armstrong #define USB_R5_ID_DIG_CNT_MASK GENMASK(23, 16) 98c9999337SNeil Armstrong 99c9999337SNeil Armstrong enum { 100c9999337SNeil Armstrong USB2_HOST_PHY = 0, 101c9999337SNeil Armstrong USB2_OTG_PHY, 102c9999337SNeil Armstrong USB3_HOST_PHY, 103c9999337SNeil Armstrong PHY_COUNT, 104c9999337SNeil Armstrong }; 105c9999337SNeil Armstrong 106c9999337SNeil Armstrong static const char *phy_names[PHY_COUNT] = { 107c9999337SNeil Armstrong "usb2-phy0", "usb2-phy1", "usb3-phy0", 108c9999337SNeil Armstrong }; 109c9999337SNeil Armstrong 1101e355f21SHanjie Lin static struct clk_bulk_data meson_g12a_clocks[] = { 1111e355f21SHanjie Lin { .id = NULL }, 1121e355f21SHanjie Lin }; 1131e355f21SHanjie Lin 1141e355f21SHanjie Lin static struct clk_bulk_data meson_a1_clocks[] = { 1151e355f21SHanjie Lin { .id = "usb_ctrl" }, 1161e355f21SHanjie Lin { .id = "usb_bus" }, 1171e355f21SHanjie Lin { .id = "xtal_usb_ctrl" }, 1181e355f21SHanjie Lin }; 1191e355f21SHanjie Lin 1201e355f21SHanjie Lin struct dwc3_meson_g12a_drvdata { 1211e355f21SHanjie Lin bool otg_switch_supported; 1221e355f21SHanjie Lin struct clk_bulk_data *clks; 1231e355f21SHanjie Lin int num_clks; 1241e355f21SHanjie Lin }; 1251e355f21SHanjie Lin 1261e355f21SHanjie Lin static struct dwc3_meson_g12a_drvdata g12a_drvdata = { 1271e355f21SHanjie Lin .otg_switch_supported = true, 1281e355f21SHanjie Lin .clks = meson_g12a_clocks, 1291e355f21SHanjie Lin .num_clks = ARRAY_SIZE(meson_g12a_clocks), 1301e355f21SHanjie Lin }; 1311e355f21SHanjie Lin 1321e355f21SHanjie Lin static struct dwc3_meson_g12a_drvdata a1_drvdata = { 1331e355f21SHanjie Lin .otg_switch_supported = false, 1341e355f21SHanjie Lin .clks = meson_a1_clocks, 1351e355f21SHanjie Lin .num_clks = ARRAY_SIZE(meson_a1_clocks), 1361e355f21SHanjie Lin }; 1371e355f21SHanjie Lin 138c9999337SNeil Armstrong struct dwc3_meson_g12a { 139c9999337SNeil Armstrong struct device *dev; 140c9999337SNeil Armstrong struct regmap *regmap; 141c9999337SNeil Armstrong struct reset_control *reset; 142c9999337SNeil Armstrong struct phy *phys[PHY_COUNT]; 143c9999337SNeil Armstrong enum usb_dr_mode otg_mode; 144c9999337SNeil Armstrong enum phy_mode otg_phy_mode; 145c9999337SNeil Armstrong unsigned int usb2_ports; 146c9999337SNeil Armstrong unsigned int usb3_ports; 147c9999337SNeil Armstrong struct regulator *vbus; 148c9999337SNeil Armstrong struct usb_role_switch_desc switch_desc; 149c9999337SNeil Armstrong struct usb_role_switch *role_switch; 1501e355f21SHanjie Lin const struct dwc3_meson_g12a_drvdata *drvdata; 151c9999337SNeil Armstrong }; 152c9999337SNeil Armstrong 153c9999337SNeil Armstrong static void dwc3_meson_g12a_usb2_set_mode(struct dwc3_meson_g12a *priv, 154c9999337SNeil Armstrong int i, enum phy_mode mode) 155c9999337SNeil Armstrong { 156c9999337SNeil Armstrong if (mode == PHY_MODE_USB_HOST) 157c9999337SNeil Armstrong regmap_update_bits(priv->regmap, U2P_R0 + (U2P_REG_SIZE * i), 158c9999337SNeil Armstrong U2P_R0_HOST_DEVICE, 159c9999337SNeil Armstrong U2P_R0_HOST_DEVICE); 160c9999337SNeil Armstrong else 161c9999337SNeil Armstrong regmap_update_bits(priv->regmap, U2P_R0 + (U2P_REG_SIZE * i), 162c9999337SNeil Armstrong U2P_R0_HOST_DEVICE, 0); 163c9999337SNeil Armstrong } 164c9999337SNeil Armstrong 165c9999337SNeil Armstrong static int dwc3_meson_g12a_usb2_init(struct dwc3_meson_g12a *priv) 166c9999337SNeil Armstrong { 167c9999337SNeil Armstrong int i; 168c9999337SNeil Armstrong 169c9999337SNeil Armstrong if (priv->otg_mode == USB_DR_MODE_PERIPHERAL) 170c9999337SNeil Armstrong priv->otg_phy_mode = PHY_MODE_USB_DEVICE; 171c9999337SNeil Armstrong else 172c9999337SNeil Armstrong priv->otg_phy_mode = PHY_MODE_USB_HOST; 173c9999337SNeil Armstrong 174c9999337SNeil Armstrong for (i = 0 ; i < USB3_HOST_PHY ; ++i) { 175c9999337SNeil Armstrong if (!priv->phys[i]) 176c9999337SNeil Armstrong continue; 177c9999337SNeil Armstrong 178c9999337SNeil Armstrong regmap_update_bits(priv->regmap, U2P_R0 + (U2P_REG_SIZE * i), 179c9999337SNeil Armstrong U2P_R0_POWER_ON_RESET, 180c9999337SNeil Armstrong U2P_R0_POWER_ON_RESET); 181c9999337SNeil Armstrong 1821e355f21SHanjie Lin if (priv->drvdata->otg_switch_supported && i == USB2_OTG_PHY) { 183c9999337SNeil Armstrong regmap_update_bits(priv->regmap, 184c9999337SNeil Armstrong U2P_R0 + (U2P_REG_SIZE * i), 185c9999337SNeil Armstrong U2P_R0_ID_PULLUP | U2P_R0_DRV_VBUS, 186c9999337SNeil Armstrong U2P_R0_ID_PULLUP | U2P_R0_DRV_VBUS); 187c9999337SNeil Armstrong 188c9999337SNeil Armstrong dwc3_meson_g12a_usb2_set_mode(priv, i, 189c9999337SNeil Armstrong priv->otg_phy_mode); 190c9999337SNeil Armstrong } else 191c9999337SNeil Armstrong dwc3_meson_g12a_usb2_set_mode(priv, i, 192c9999337SNeil Armstrong PHY_MODE_USB_HOST); 193c9999337SNeil Armstrong 194c9999337SNeil Armstrong regmap_update_bits(priv->regmap, U2P_R0 + (U2P_REG_SIZE * i), 195c9999337SNeil Armstrong U2P_R0_POWER_ON_RESET, 0); 196c9999337SNeil Armstrong } 197c9999337SNeil Armstrong 198c9999337SNeil Armstrong return 0; 199c9999337SNeil Armstrong } 200c9999337SNeil Armstrong 201c9999337SNeil Armstrong static void dwc3_meson_g12a_usb3_init(struct dwc3_meson_g12a *priv) 202c9999337SNeil Armstrong { 203c9999337SNeil Armstrong regmap_update_bits(priv->regmap, USB_R3, 204c9999337SNeil Armstrong USB_R3_P30_SSC_RANGE_MASK | 205c9999337SNeil Armstrong USB_R3_P30_REF_SSP_EN, 206c9999337SNeil Armstrong USB_R3_P30_SSC_ENABLE | 207c9999337SNeil Armstrong FIELD_PREP(USB_R3_P30_SSC_RANGE_MASK, 2) | 208c9999337SNeil Armstrong USB_R3_P30_REF_SSP_EN); 209c9999337SNeil Armstrong udelay(2); 210c9999337SNeil Armstrong 211c9999337SNeil Armstrong regmap_update_bits(priv->regmap, USB_R2, 212c9999337SNeil Armstrong USB_R2_P30_PCS_TX_DEEMPH_3P5DB_MASK, 213c9999337SNeil Armstrong FIELD_PREP(USB_R2_P30_PCS_TX_DEEMPH_3P5DB_MASK, 0x15)); 214c9999337SNeil Armstrong 215c9999337SNeil Armstrong regmap_update_bits(priv->regmap, USB_R2, 216c9999337SNeil Armstrong USB_R2_P30_PCS_TX_DEEMPH_6DB_MASK, 217c9999337SNeil Armstrong FIELD_PREP(USB_R2_P30_PCS_TX_DEEMPH_6DB_MASK, 0x20)); 218c9999337SNeil Armstrong 219c9999337SNeil Armstrong udelay(2); 220c9999337SNeil Armstrong 221c9999337SNeil Armstrong regmap_update_bits(priv->regmap, USB_R1, 222c9999337SNeil Armstrong USB_R1_U3H_HOST_PORT_POWER_CONTROL_PRESENT, 223c9999337SNeil Armstrong USB_R1_U3H_HOST_PORT_POWER_CONTROL_PRESENT); 224c9999337SNeil Armstrong 225c9999337SNeil Armstrong regmap_update_bits(priv->regmap, USB_R1, 226c9999337SNeil Armstrong USB_R1_P30_PCS_TX_SWING_FULL_MASK, 227c9999337SNeil Armstrong FIELD_PREP(USB_R1_P30_PCS_TX_SWING_FULL_MASK, 127)); 228c9999337SNeil Armstrong } 229c9999337SNeil Armstrong 230c9999337SNeil Armstrong static void dwc3_meson_g12a_usb_otg_apply_mode(struct dwc3_meson_g12a *priv) 231c9999337SNeil Armstrong { 232c9999337SNeil Armstrong if (priv->otg_phy_mode == PHY_MODE_USB_DEVICE) { 233c9999337SNeil Armstrong regmap_update_bits(priv->regmap, USB_R0, 234c9999337SNeil Armstrong USB_R0_U2D_ACT, USB_R0_U2D_ACT); 235c9999337SNeil Armstrong regmap_update_bits(priv->regmap, USB_R0, 236c9999337SNeil Armstrong USB_R0_U2D_SS_SCALEDOWN_MODE_MASK, 0); 237c9999337SNeil Armstrong regmap_update_bits(priv->regmap, USB_R4, 238c9999337SNeil Armstrong USB_R4_P21_SLEEP_M0, USB_R4_P21_SLEEP_M0); 239c9999337SNeil Armstrong } else { 240c9999337SNeil Armstrong regmap_update_bits(priv->regmap, USB_R0, 241c9999337SNeil Armstrong USB_R0_U2D_ACT, 0); 242c9999337SNeil Armstrong regmap_update_bits(priv->regmap, USB_R4, 243c9999337SNeil Armstrong USB_R4_P21_SLEEP_M0, 0); 244c9999337SNeil Armstrong } 245c9999337SNeil Armstrong } 246c9999337SNeil Armstrong 247c9999337SNeil Armstrong static int dwc3_meson_g12a_usb_init(struct dwc3_meson_g12a *priv) 248c9999337SNeil Armstrong { 249c9999337SNeil Armstrong int ret; 250c9999337SNeil Armstrong 251c9999337SNeil Armstrong ret = dwc3_meson_g12a_usb2_init(priv); 252c9999337SNeil Armstrong if (ret) 253c9999337SNeil Armstrong return ret; 254c9999337SNeil Armstrong 255c9999337SNeil Armstrong regmap_update_bits(priv->regmap, USB_R1, 256c9999337SNeil Armstrong USB_R1_U3H_FLADJ_30MHZ_REG_MASK, 257c9999337SNeil Armstrong FIELD_PREP(USB_R1_U3H_FLADJ_30MHZ_REG_MASK, 0x20)); 258c9999337SNeil Armstrong 259c9999337SNeil Armstrong regmap_update_bits(priv->regmap, USB_R5, 260c9999337SNeil Armstrong USB_R5_ID_DIG_EN_0, 261c9999337SNeil Armstrong USB_R5_ID_DIG_EN_0); 262c9999337SNeil Armstrong regmap_update_bits(priv->regmap, USB_R5, 263c9999337SNeil Armstrong USB_R5_ID_DIG_EN_1, 264c9999337SNeil Armstrong USB_R5_ID_DIG_EN_1); 265c9999337SNeil Armstrong regmap_update_bits(priv->regmap, USB_R5, 266c9999337SNeil Armstrong USB_R5_ID_DIG_TH_MASK, 267c9999337SNeil Armstrong FIELD_PREP(USB_R5_ID_DIG_TH_MASK, 0xff)); 268c9999337SNeil Armstrong 269c9999337SNeil Armstrong /* If we have an actual SuperSpeed port, initialize it */ 270c9999337SNeil Armstrong if (priv->usb3_ports) 271c9999337SNeil Armstrong dwc3_meson_g12a_usb3_init(priv); 272c9999337SNeil Armstrong 273c9999337SNeil Armstrong dwc3_meson_g12a_usb_otg_apply_mode(priv); 274c9999337SNeil Armstrong 275c9999337SNeil Armstrong return 0; 276c9999337SNeil Armstrong } 277c9999337SNeil Armstrong 278c9999337SNeil Armstrong static const struct regmap_config phy_meson_g12a_usb3_regmap_conf = { 279c9999337SNeil Armstrong .reg_bits = 8, 280c9999337SNeil Armstrong .val_bits = 32, 281c9999337SNeil Armstrong .reg_stride = 4, 282c9999337SNeil Armstrong .max_register = USB_R5, 283c9999337SNeil Armstrong }; 284c9999337SNeil Armstrong 285c9999337SNeil Armstrong static int dwc3_meson_g12a_get_phys(struct dwc3_meson_g12a *priv) 286c9999337SNeil Armstrong { 287c9999337SNeil Armstrong int i; 288c9999337SNeil Armstrong 289c9999337SNeil Armstrong for (i = 0 ; i < PHY_COUNT ; ++i) { 290c9999337SNeil Armstrong priv->phys[i] = devm_phy_optional_get(priv->dev, phy_names[i]); 291c9999337SNeil Armstrong if (!priv->phys[i]) 292c9999337SNeil Armstrong continue; 293c9999337SNeil Armstrong 294c9999337SNeil Armstrong if (IS_ERR(priv->phys[i])) 295c9999337SNeil Armstrong return PTR_ERR(priv->phys[i]); 296c9999337SNeil Armstrong 297c9999337SNeil Armstrong if (i == USB3_HOST_PHY) 298c9999337SNeil Armstrong priv->usb3_ports++; 299c9999337SNeil Armstrong else 300c9999337SNeil Armstrong priv->usb2_ports++; 301c9999337SNeil Armstrong } 302c9999337SNeil Armstrong 303c9999337SNeil Armstrong dev_info(priv->dev, "USB2 ports: %d\n", priv->usb2_ports); 304c9999337SNeil Armstrong dev_info(priv->dev, "USB3 ports: %d\n", priv->usb3_ports); 305c9999337SNeil Armstrong 306c9999337SNeil Armstrong return 0; 307c9999337SNeil Armstrong } 308c9999337SNeil Armstrong 309c9999337SNeil Armstrong static enum phy_mode dwc3_meson_g12a_get_id(struct dwc3_meson_g12a *priv) 310c9999337SNeil Armstrong { 311c9999337SNeil Armstrong u32 reg; 312c9999337SNeil Armstrong 313c9999337SNeil Armstrong regmap_read(priv->regmap, USB_R5, ®); 314c9999337SNeil Armstrong 315c9999337SNeil Armstrong if (reg & (USB_R5_ID_DIG_SYNC | USB_R5_ID_DIG_REG)) 316c9999337SNeil Armstrong return PHY_MODE_USB_DEVICE; 317c9999337SNeil Armstrong 318c9999337SNeil Armstrong return PHY_MODE_USB_HOST; 319c9999337SNeil Armstrong } 320c9999337SNeil Armstrong 321c9999337SNeil Armstrong static int dwc3_meson_g12a_otg_mode_set(struct dwc3_meson_g12a *priv, 322c9999337SNeil Armstrong enum phy_mode mode) 323c9999337SNeil Armstrong { 324c9999337SNeil Armstrong int ret; 325c9999337SNeil Armstrong 3261e355f21SHanjie Lin if (!priv->drvdata->otg_switch_supported || !priv->phys[USB2_OTG_PHY]) 327c9999337SNeil Armstrong return -EINVAL; 328c9999337SNeil Armstrong 329c9999337SNeil Armstrong if (mode == PHY_MODE_USB_HOST) 330c9999337SNeil Armstrong dev_info(priv->dev, "switching to Host Mode\n"); 331c9999337SNeil Armstrong else 332c9999337SNeil Armstrong dev_info(priv->dev, "switching to Device Mode\n"); 333c9999337SNeil Armstrong 334c9999337SNeil Armstrong if (priv->vbus) { 335c9999337SNeil Armstrong if (mode == PHY_MODE_USB_DEVICE) 336c9999337SNeil Armstrong ret = regulator_disable(priv->vbus); 337c9999337SNeil Armstrong else 338c9999337SNeil Armstrong ret = regulator_enable(priv->vbus); 339c9999337SNeil Armstrong if (ret) 340c9999337SNeil Armstrong return ret; 341c9999337SNeil Armstrong } 342c9999337SNeil Armstrong 343c9999337SNeil Armstrong priv->otg_phy_mode = mode; 344c9999337SNeil Armstrong 345c9999337SNeil Armstrong dwc3_meson_g12a_usb2_set_mode(priv, USB2_OTG_PHY, mode); 346c9999337SNeil Armstrong 347c9999337SNeil Armstrong dwc3_meson_g12a_usb_otg_apply_mode(priv); 348c9999337SNeil Armstrong 349c9999337SNeil Armstrong return 0; 350c9999337SNeil Armstrong } 351c9999337SNeil Armstrong 352c9999337SNeil Armstrong static int dwc3_meson_g12a_role_set(struct device *dev, enum usb_role role) 353c9999337SNeil Armstrong { 354c9999337SNeil Armstrong struct dwc3_meson_g12a *priv = dev_get_drvdata(dev); 355c9999337SNeil Armstrong enum phy_mode mode; 356c9999337SNeil Armstrong 357c9999337SNeil Armstrong if (role == USB_ROLE_NONE) 358c9999337SNeil Armstrong return 0; 359c9999337SNeil Armstrong 360c9999337SNeil Armstrong mode = (role == USB_ROLE_HOST) ? PHY_MODE_USB_HOST 361c9999337SNeil Armstrong : PHY_MODE_USB_DEVICE; 362c9999337SNeil Armstrong 363c9999337SNeil Armstrong if (mode == priv->otg_phy_mode) 364c9999337SNeil Armstrong return 0; 365c9999337SNeil Armstrong 366c9999337SNeil Armstrong return dwc3_meson_g12a_otg_mode_set(priv, mode); 367c9999337SNeil Armstrong } 368c9999337SNeil Armstrong 369c9999337SNeil Armstrong static enum usb_role dwc3_meson_g12a_role_get(struct device *dev) 370c9999337SNeil Armstrong { 371c9999337SNeil Armstrong struct dwc3_meson_g12a *priv = dev_get_drvdata(dev); 372c9999337SNeil Armstrong 373c9999337SNeil Armstrong return priv->otg_phy_mode == PHY_MODE_USB_HOST ? 374c9999337SNeil Armstrong USB_ROLE_HOST : USB_ROLE_DEVICE; 375c9999337SNeil Armstrong } 376c9999337SNeil Armstrong 377f90db107SNeil Armstrong static irqreturn_t dwc3_meson_g12a_irq_thread(int irq, void *data) 378f90db107SNeil Armstrong { 379f90db107SNeil Armstrong struct dwc3_meson_g12a *priv = data; 380f90db107SNeil Armstrong enum phy_mode otg_id; 381f90db107SNeil Armstrong 382f90db107SNeil Armstrong otg_id = dwc3_meson_g12a_get_id(priv); 383f90db107SNeil Armstrong if (otg_id != priv->otg_phy_mode) { 384f90db107SNeil Armstrong if (dwc3_meson_g12a_otg_mode_set(priv, otg_id)) 385f90db107SNeil Armstrong dev_warn(priv->dev, "Failed to switch OTG mode\n"); 386f90db107SNeil Armstrong } 387f90db107SNeil Armstrong 388f90db107SNeil Armstrong regmap_update_bits(priv->regmap, USB_R5, USB_R5_ID_DIG_IRQ, 0); 389f90db107SNeil Armstrong 390f90db107SNeil Armstrong return IRQ_HANDLED; 391f90db107SNeil Armstrong } 392f90db107SNeil Armstrong 393c9999337SNeil Armstrong static struct device *dwc3_meson_g12_find_child(struct device *dev, 394c9999337SNeil Armstrong const char *compatible) 395c9999337SNeil Armstrong { 396c9999337SNeil Armstrong struct platform_device *pdev; 397c9999337SNeil Armstrong struct device_node *np; 398c9999337SNeil Armstrong 399c9999337SNeil Armstrong np = of_get_compatible_child(dev->of_node, compatible); 400c9999337SNeil Armstrong if (!np) 401c9999337SNeil Armstrong return NULL; 402c9999337SNeil Armstrong 403c9999337SNeil Armstrong pdev = of_find_device_by_node(np); 404c9999337SNeil Armstrong of_node_put(np); 405c9999337SNeil Armstrong if (!pdev) 406c9999337SNeil Armstrong return NULL; 407c9999337SNeil Armstrong 408c9999337SNeil Armstrong return &pdev->dev; 409c9999337SNeil Armstrong } 410c9999337SNeil Armstrong 4111e355f21SHanjie Lin static int dwc3_meson_g12a_otg_init(struct platform_device *pdev, 4121e355f21SHanjie Lin struct dwc3_meson_g12a *priv) 413c9999337SNeil Armstrong { 414c9999337SNeil Armstrong enum phy_mode otg_id; 4151e355f21SHanjie Lin int ret, irq; 4161e355f21SHanjie Lin struct device *dev = &pdev->dev; 417c9999337SNeil Armstrong 4181e355f21SHanjie Lin if (!priv->drvdata->otg_switch_supported) 4191e355f21SHanjie Lin return 0; 420c9999337SNeil Armstrong 421f90db107SNeil Armstrong if (priv->otg_mode == USB_DR_MODE_OTG) { 422f90db107SNeil Armstrong /* Ack irq before registering */ 423f90db107SNeil Armstrong regmap_update_bits(priv->regmap, USB_R5, 424f90db107SNeil Armstrong USB_R5_ID_DIG_IRQ, 0); 425f90db107SNeil Armstrong 426f90db107SNeil Armstrong irq = platform_get_irq(pdev, 0); 427f90db107SNeil Armstrong ret = devm_request_threaded_irq(&pdev->dev, irq, NULL, 428f90db107SNeil Armstrong dwc3_meson_g12a_irq_thread, 429f90db107SNeil Armstrong IRQF_ONESHOT, pdev->name, priv); 430f90db107SNeil Armstrong if (ret) 431f90db107SNeil Armstrong return ret; 432f90db107SNeil Armstrong } 433f90db107SNeil Armstrong 434c9999337SNeil Armstrong /* Setup OTG mode corresponding to the ID pin */ 435c9999337SNeil Armstrong if (priv->otg_mode == USB_DR_MODE_OTG) { 436c9999337SNeil Armstrong otg_id = dwc3_meson_g12a_get_id(priv); 437c9999337SNeil Armstrong if (otg_id != priv->otg_phy_mode) { 438c9999337SNeil Armstrong if (dwc3_meson_g12a_otg_mode_set(priv, otg_id)) 439c9999337SNeil Armstrong dev_warn(dev, "Failed to switch OTG mode\n"); 440c9999337SNeil Armstrong } 441c9999337SNeil Armstrong } 442c9999337SNeil Armstrong 443c9999337SNeil Armstrong /* Setup role switcher */ 444c9999337SNeil Armstrong priv->switch_desc.usb2_port = dwc3_meson_g12_find_child(dev, 445c9999337SNeil Armstrong "snps,dwc3"); 446c9999337SNeil Armstrong priv->switch_desc.udc = dwc3_meson_g12_find_child(dev, "snps,dwc2"); 447c9999337SNeil Armstrong priv->switch_desc.allow_userspace_control = true; 448c9999337SNeil Armstrong priv->switch_desc.set = dwc3_meson_g12a_role_set; 449c9999337SNeil Armstrong priv->switch_desc.get = dwc3_meson_g12a_role_get; 450c9999337SNeil Armstrong 451c9999337SNeil Armstrong priv->role_switch = usb_role_switch_register(dev, &priv->switch_desc); 452c9999337SNeil Armstrong if (IS_ERR(priv->role_switch)) 453c9999337SNeil Armstrong dev_warn(dev, "Unable to register Role Switch\n"); 454c9999337SNeil Armstrong 4551e355f21SHanjie Lin return ret; 4561e355f21SHanjie Lin } 4571e355f21SHanjie Lin 4581e355f21SHanjie Lin static int dwc3_meson_g12a_probe(struct platform_device *pdev) 4591e355f21SHanjie Lin { 4601e355f21SHanjie Lin struct dwc3_meson_g12a *priv; 4611e355f21SHanjie Lin struct device *dev = &pdev->dev; 4621e355f21SHanjie Lin struct device_node *np = dev->of_node; 4631e355f21SHanjie Lin void __iomem *base; 4641e355f21SHanjie Lin int ret, i; 4651e355f21SHanjie Lin 4661e355f21SHanjie Lin priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); 4671e355f21SHanjie Lin if (!priv) 4681e355f21SHanjie Lin return -ENOMEM; 4691e355f21SHanjie Lin 4701e355f21SHanjie Lin base = devm_platform_ioremap_resource(pdev, 0); 4711e355f21SHanjie Lin if (IS_ERR(base)) 4721e355f21SHanjie Lin return PTR_ERR(base); 4731e355f21SHanjie Lin 4741e355f21SHanjie Lin priv->regmap = devm_regmap_init_mmio(dev, base, 4751e355f21SHanjie Lin &phy_meson_g12a_usb3_regmap_conf); 4761e355f21SHanjie Lin if (IS_ERR(priv->regmap)) 4771e355f21SHanjie Lin return PTR_ERR(priv->regmap); 4781e355f21SHanjie Lin 4791e355f21SHanjie Lin priv->vbus = devm_regulator_get_optional(dev, "vbus"); 4801e355f21SHanjie Lin if (IS_ERR(priv->vbus)) { 4811e355f21SHanjie Lin if (PTR_ERR(priv->vbus) == -EPROBE_DEFER) 4821e355f21SHanjie Lin return PTR_ERR(priv->vbus); 4831e355f21SHanjie Lin priv->vbus = NULL; 4841e355f21SHanjie Lin } 4851e355f21SHanjie Lin 4861e355f21SHanjie Lin priv->drvdata = of_device_get_match_data(&pdev->dev); 4871e355f21SHanjie Lin 4881e355f21SHanjie Lin ret = devm_clk_bulk_get(dev, 4891e355f21SHanjie Lin priv->drvdata->num_clks, 4901e355f21SHanjie Lin priv->drvdata->clks); 4911e355f21SHanjie Lin if (ret) 4921e355f21SHanjie Lin return ret; 4931e355f21SHanjie Lin 4941e355f21SHanjie Lin ret = clk_bulk_prepare_enable(priv->drvdata->num_clks, 4951e355f21SHanjie Lin priv->drvdata->clks); 4961e355f21SHanjie Lin if (ret) 4971e355f21SHanjie Lin return ret; 4981e355f21SHanjie Lin 4991e355f21SHanjie Lin platform_set_drvdata(pdev, priv); 5001e355f21SHanjie Lin priv->dev = dev; 5011e355f21SHanjie Lin 5021e355f21SHanjie Lin priv->reset = devm_reset_control_get(dev, NULL); 5031e355f21SHanjie Lin if (IS_ERR(priv->reset)) { 5041e355f21SHanjie Lin ret = PTR_ERR(priv->reset); 5051e355f21SHanjie Lin dev_err(dev, "failed to get device reset, err=%d\n", ret); 5061e355f21SHanjie Lin return ret; 5071e355f21SHanjie Lin } 5081e355f21SHanjie Lin 5091e355f21SHanjie Lin ret = reset_control_reset(priv->reset); 5101e355f21SHanjie Lin if (ret) 5111e355f21SHanjie Lin goto err_disable_clks; 5121e355f21SHanjie Lin 5131e355f21SHanjie Lin ret = dwc3_meson_g12a_get_phys(priv); 5141e355f21SHanjie Lin if (ret) 5151e355f21SHanjie Lin goto err_disable_clks; 5161e355f21SHanjie Lin 5171e355f21SHanjie Lin if (priv->vbus) { 5181e355f21SHanjie Lin ret = regulator_enable(priv->vbus); 5191e355f21SHanjie Lin if (ret) 5201e355f21SHanjie Lin goto err_disable_clks; 5211e355f21SHanjie Lin } 5221e355f21SHanjie Lin 5231e355f21SHanjie Lin /* Get dr_mode */ 5241e355f21SHanjie Lin priv->otg_mode = usb_get_dr_mode(dev); 5251e355f21SHanjie Lin 5261e355f21SHanjie Lin dwc3_meson_g12a_usb_init(priv); 5271e355f21SHanjie Lin 5281e355f21SHanjie Lin /* Init PHYs */ 5291e355f21SHanjie Lin for (i = 0 ; i < PHY_COUNT ; ++i) { 5301e355f21SHanjie Lin ret = phy_init(priv->phys[i]); 5311e355f21SHanjie Lin if (ret) 5321e355f21SHanjie Lin goto err_disable_clks; 5331e355f21SHanjie Lin } 5341e355f21SHanjie Lin 5351e355f21SHanjie Lin /* Set PHY Power */ 5361e355f21SHanjie Lin for (i = 0 ; i < PHY_COUNT ; ++i) { 5371e355f21SHanjie Lin ret = phy_power_on(priv->phys[i]); 5381e355f21SHanjie Lin if (ret) 5391e355f21SHanjie Lin goto err_phys_exit; 5401e355f21SHanjie Lin } 5411e355f21SHanjie Lin 5421e355f21SHanjie Lin ret = of_platform_populate(np, NULL, NULL, dev); 5431e355f21SHanjie Lin if (ret) 5441e355f21SHanjie Lin goto err_phys_power; 5451e355f21SHanjie Lin 5461e355f21SHanjie Lin ret = dwc3_meson_g12a_otg_init(pdev, priv); 5471e355f21SHanjie Lin if (ret) 5481e355f21SHanjie Lin goto err_phys_power; 5491e355f21SHanjie Lin 550c9999337SNeil Armstrong pm_runtime_set_active(dev); 551c9999337SNeil Armstrong pm_runtime_enable(dev); 552c9999337SNeil Armstrong pm_runtime_get_sync(dev); 553c9999337SNeil Armstrong 554c9999337SNeil Armstrong return 0; 555c9999337SNeil Armstrong 556c9999337SNeil Armstrong err_phys_power: 557c9999337SNeil Armstrong for (i = 0 ; i < PHY_COUNT ; ++i) 558c9999337SNeil Armstrong phy_power_off(priv->phys[i]); 559c9999337SNeil Armstrong 560c9999337SNeil Armstrong err_phys_exit: 561c9999337SNeil Armstrong for (i = 0 ; i < PHY_COUNT ; ++i) 562c9999337SNeil Armstrong phy_exit(priv->phys[i]); 563c9999337SNeil Armstrong 5641e355f21SHanjie Lin err_disable_clks: 5651e355f21SHanjie Lin clk_bulk_disable_unprepare(priv->drvdata->num_clks, 5661e355f21SHanjie Lin priv->drvdata->clks); 5671e355f21SHanjie Lin 568c9999337SNeil Armstrong return ret; 569c9999337SNeil Armstrong } 570c9999337SNeil Armstrong 571c9999337SNeil Armstrong static int dwc3_meson_g12a_remove(struct platform_device *pdev) 572c9999337SNeil Armstrong { 573c9999337SNeil Armstrong struct dwc3_meson_g12a *priv = platform_get_drvdata(pdev); 574c9999337SNeil Armstrong struct device *dev = &pdev->dev; 575c9999337SNeil Armstrong int i; 576c9999337SNeil Armstrong 5771e355f21SHanjie Lin if (priv->drvdata->otg_switch_supported) 578c9999337SNeil Armstrong usb_role_switch_unregister(priv->role_switch); 579c9999337SNeil Armstrong 580c9999337SNeil Armstrong of_platform_depopulate(dev); 581c9999337SNeil Armstrong 582c9999337SNeil Armstrong for (i = 0 ; i < PHY_COUNT ; ++i) { 583c9999337SNeil Armstrong phy_power_off(priv->phys[i]); 584c9999337SNeil Armstrong phy_exit(priv->phys[i]); 585c9999337SNeil Armstrong } 586c9999337SNeil Armstrong 587c9999337SNeil Armstrong pm_runtime_disable(dev); 588c9999337SNeil Armstrong pm_runtime_put_noidle(dev); 589c9999337SNeil Armstrong pm_runtime_set_suspended(dev); 590c9999337SNeil Armstrong 5911e355f21SHanjie Lin clk_bulk_disable_unprepare(priv->drvdata->num_clks, 5921e355f21SHanjie Lin priv->drvdata->clks); 5931e355f21SHanjie Lin 594c9999337SNeil Armstrong return 0; 595c9999337SNeil Armstrong } 596c9999337SNeil Armstrong 597c9999337SNeil Armstrong static int __maybe_unused dwc3_meson_g12a_runtime_suspend(struct device *dev) 598c9999337SNeil Armstrong { 599c9999337SNeil Armstrong struct dwc3_meson_g12a *priv = dev_get_drvdata(dev); 600c9999337SNeil Armstrong 6011e355f21SHanjie Lin clk_bulk_disable_unprepare(priv->drvdata->num_clks, 6021e355f21SHanjie Lin priv->drvdata->clks); 603c9999337SNeil Armstrong 604c9999337SNeil Armstrong return 0; 605c9999337SNeil Armstrong } 606c9999337SNeil Armstrong 607c9999337SNeil Armstrong static int __maybe_unused dwc3_meson_g12a_runtime_resume(struct device *dev) 608c9999337SNeil Armstrong { 609c9999337SNeil Armstrong struct dwc3_meson_g12a *priv = dev_get_drvdata(dev); 610c9999337SNeil Armstrong 6111e355f21SHanjie Lin return clk_bulk_prepare_enable(priv->drvdata->num_clks, 6121e355f21SHanjie Lin priv->drvdata->clks); 613c9999337SNeil Armstrong } 614c9999337SNeil Armstrong 615c9999337SNeil Armstrong static int __maybe_unused dwc3_meson_g12a_suspend(struct device *dev) 616c9999337SNeil Armstrong { 617c9999337SNeil Armstrong struct dwc3_meson_g12a *priv = dev_get_drvdata(dev); 6181cf084d1SNeil Armstrong int i, ret; 6191cf084d1SNeil Armstrong 6201cf084d1SNeil Armstrong if (priv->vbus && priv->otg_phy_mode == PHY_MODE_USB_HOST) { 6211cf084d1SNeil Armstrong ret = regulator_disable(priv->vbus); 6221cf084d1SNeil Armstrong if (ret) 6231cf084d1SNeil Armstrong return ret; 6241cf084d1SNeil Armstrong } 625c9999337SNeil Armstrong 626c9999337SNeil Armstrong for (i = 0 ; i < PHY_COUNT ; ++i) { 627c9999337SNeil Armstrong phy_power_off(priv->phys[i]); 628c9999337SNeil Armstrong phy_exit(priv->phys[i]); 629c9999337SNeil Armstrong } 630c9999337SNeil Armstrong 631c9999337SNeil Armstrong reset_control_assert(priv->reset); 632c9999337SNeil Armstrong 633c9999337SNeil Armstrong return 0; 634c9999337SNeil Armstrong } 635c9999337SNeil Armstrong 636c9999337SNeil Armstrong static int __maybe_unused dwc3_meson_g12a_resume(struct device *dev) 637c9999337SNeil Armstrong { 638c9999337SNeil Armstrong struct dwc3_meson_g12a *priv = dev_get_drvdata(dev); 639c9999337SNeil Armstrong int i, ret; 640c9999337SNeil Armstrong 641c9999337SNeil Armstrong reset_control_deassert(priv->reset); 642c9999337SNeil Armstrong 643c9999337SNeil Armstrong dwc3_meson_g12a_usb_init(priv); 644c9999337SNeil Armstrong 645c9999337SNeil Armstrong /* Init PHYs */ 646c9999337SNeil Armstrong for (i = 0 ; i < PHY_COUNT ; ++i) { 647c9999337SNeil Armstrong ret = phy_init(priv->phys[i]); 648c9999337SNeil Armstrong if (ret) 649c9999337SNeil Armstrong return ret; 650c9999337SNeil Armstrong } 651c9999337SNeil Armstrong 652c9999337SNeil Armstrong /* Set PHY Power */ 653c9999337SNeil Armstrong for (i = 0 ; i < PHY_COUNT ; ++i) { 654c9999337SNeil Armstrong ret = phy_power_on(priv->phys[i]); 655c9999337SNeil Armstrong if (ret) 656c9999337SNeil Armstrong return ret; 657c9999337SNeil Armstrong } 658c9999337SNeil Armstrong 6591cf084d1SNeil Armstrong if (priv->vbus && priv->otg_phy_mode == PHY_MODE_USB_HOST) { 6601cf084d1SNeil Armstrong ret = regulator_enable(priv->vbus); 6611cf084d1SNeil Armstrong if (ret) 6621cf084d1SNeil Armstrong return ret; 6631cf084d1SNeil Armstrong } 6641cf084d1SNeil Armstrong 665c9999337SNeil Armstrong return 0; 666c9999337SNeil Armstrong } 667c9999337SNeil Armstrong 668c9999337SNeil Armstrong static const struct dev_pm_ops dwc3_meson_g12a_dev_pm_ops = { 669c9999337SNeil Armstrong SET_SYSTEM_SLEEP_PM_OPS(dwc3_meson_g12a_suspend, dwc3_meson_g12a_resume) 670c9999337SNeil Armstrong SET_RUNTIME_PM_OPS(dwc3_meson_g12a_runtime_suspend, 671c9999337SNeil Armstrong dwc3_meson_g12a_runtime_resume, NULL) 672c9999337SNeil Armstrong }; 673c9999337SNeil Armstrong 674c9999337SNeil Armstrong static const struct of_device_id dwc3_meson_g12a_match[] = { 6751e355f21SHanjie Lin { 6761e355f21SHanjie Lin .compatible = "amlogic,meson-g12a-usb-ctrl", 6771e355f21SHanjie Lin .data = &g12a_drvdata, 6781e355f21SHanjie Lin }, 6791e355f21SHanjie Lin { 6801e355f21SHanjie Lin .compatible = "amlogic,meson-a1-usb-ctrl", 6811e355f21SHanjie Lin .data = &a1_drvdata, 6821e355f21SHanjie Lin }, 683c9999337SNeil Armstrong { /* Sentinel */ } 684c9999337SNeil Armstrong }; 685c9999337SNeil Armstrong MODULE_DEVICE_TABLE(of, dwc3_meson_g12a_match); 686c9999337SNeil Armstrong 687c9999337SNeil Armstrong static struct platform_driver dwc3_meson_g12a_driver = { 688c9999337SNeil Armstrong .probe = dwc3_meson_g12a_probe, 689c9999337SNeil Armstrong .remove = dwc3_meson_g12a_remove, 690c9999337SNeil Armstrong .driver = { 691c9999337SNeil Armstrong .name = "dwc3-meson-g12a", 692c9999337SNeil Armstrong .of_match_table = dwc3_meson_g12a_match, 693c9999337SNeil Armstrong .pm = &dwc3_meson_g12a_dev_pm_ops, 694c9999337SNeil Armstrong }, 695c9999337SNeil Armstrong }; 696c9999337SNeil Armstrong 697c9999337SNeil Armstrong module_platform_driver(dwc3_meson_g12a_driver); 698c9999337SNeil Armstrong MODULE_LICENSE("GPL v2"); 699c9999337SNeil Armstrong MODULE_DESCRIPTION("Amlogic Meson G12A USB Glue Layer"); 700c9999337SNeil Armstrong MODULE_AUTHOR("Neil Armstrong <narmstrong@baylibre.com>"); 701