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 33013af227SNeil Armstrong /* USB2 Ports Control Registers, offsets are per-port */ 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 53013af227SNeil Armstrong #define G12A_GLUE_OFFSET 0x80 54013af227SNeil Armstrong 55013af227SNeil Armstrong #define USB_R0 0x00 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 62013af227SNeil Armstrong #define USB_R1 0x04 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 74013af227SNeil Armstrong #define USB_R2 0x08 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 78013af227SNeil Armstrong #define USB_R3 0x0c 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 84013af227SNeil Armstrong #define USB_R4 0x10 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 90013af227SNeil Armstrong #define USB_R5 0x14 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 1015174564cSNeil Armstrong #define PHY_COUNT 3 1025174564cSNeil Armstrong #define USB2_OTG_PHY 1 103c9999337SNeil Armstrong 104a9fc15e0SNeil Armstrong static struct clk_bulk_data meson_gxl_clocks[] = { 105a9fc15e0SNeil Armstrong { .id = "usb_ctrl" }, 106a9fc15e0SNeil Armstrong { .id = "ddr" }, 107a9fc15e0SNeil Armstrong }; 108a9fc15e0SNeil Armstrong 1091e355f21SHanjie Lin static struct clk_bulk_data meson_g12a_clocks[] = { 1101e355f21SHanjie Lin { .id = NULL }, 1111e355f21SHanjie Lin }; 1121e355f21SHanjie Lin 1131e355f21SHanjie Lin static struct clk_bulk_data meson_a1_clocks[] = { 1141e355f21SHanjie Lin { .id = "usb_ctrl" }, 1151e355f21SHanjie Lin { .id = "usb_bus" }, 1161e355f21SHanjie Lin { .id = "xtal_usb_ctrl" }, 1171e355f21SHanjie Lin }; 1181e355f21SHanjie Lin 119e5ee93d4SFelipe Balbi static const char * const meson_gxm_phy_names[] = { 120a9fc15e0SNeil Armstrong "usb2-phy0", "usb2-phy1", "usb2-phy2", 121a9fc15e0SNeil Armstrong }; 122a9fc15e0SNeil Armstrong 123e5ee93d4SFelipe Balbi static const char * const meson_g12a_phy_names[] = { 1245174564cSNeil Armstrong "usb2-phy0", "usb2-phy1", "usb3-phy0", 1255174564cSNeil Armstrong }; 1265174564cSNeil Armstrong 1275174564cSNeil Armstrong /* 1285174564cSNeil Armstrong * Amlogic A1 has a single physical PHY, in slot 1, but still has the 1295174564cSNeil Armstrong * two U2 PHY controls register blocks like G12A. 1305174564cSNeil Armstrong * Handling the first PHY on slot 1 would need a large amount of code 1315174564cSNeil Armstrong * changes, and the current management is generic enough to handle it 1325174564cSNeil Armstrong * correctly when only the "usb2-phy1" phy is specified on-par with the 1335174564cSNeil Armstrong * DT bindings. 1345174564cSNeil Armstrong */ 135e5ee93d4SFelipe Balbi static const char * const meson_a1_phy_names[] = { 1365174564cSNeil Armstrong "usb2-phy0", "usb2-phy1" 1375174564cSNeil Armstrong }; 1385174564cSNeil Armstrong 139013af227SNeil Armstrong struct dwc3_meson_g12a; 140013af227SNeil Armstrong 1411e355f21SHanjie Lin struct dwc3_meson_g12a_drvdata { 1421e355f21SHanjie Lin bool otg_switch_supported; 143df7e3745SNeil Armstrong bool otg_phy_host_port_disable; 1441e355f21SHanjie Lin struct clk_bulk_data *clks; 1451e355f21SHanjie Lin int num_clks; 146e5ee93d4SFelipe Balbi const char * const *phy_names; 1475174564cSNeil Armstrong int num_phys; 148013af227SNeil Armstrong int (*setup_regmaps)(struct dwc3_meson_g12a *priv, void __iomem *base); 14931306821SNeil Armstrong int (*usb2_init_phy)(struct dwc3_meson_g12a *priv, int i, 15031306821SNeil Armstrong enum phy_mode mode); 15131306821SNeil Armstrong int (*set_phy_mode)(struct dwc3_meson_g12a *priv, int i, 15231306821SNeil Armstrong enum phy_mode mode); 1535b0ba0caSNeil Armstrong int (*usb_init)(struct dwc3_meson_g12a *priv); 1545b0ba0caSNeil Armstrong int (*usb_post_init)(struct dwc3_meson_g12a *priv); 1551e355f21SHanjie Lin }; 1561e355f21SHanjie Lin 157a9fc15e0SNeil Armstrong static int dwc3_meson_gxl_setup_regmaps(struct dwc3_meson_g12a *priv, 158a9fc15e0SNeil Armstrong void __iomem *base); 159013af227SNeil Armstrong static int dwc3_meson_g12a_setup_regmaps(struct dwc3_meson_g12a *priv, 160013af227SNeil Armstrong void __iomem *base); 161013af227SNeil Armstrong 16231306821SNeil Armstrong static int dwc3_meson_g12a_usb2_init_phy(struct dwc3_meson_g12a *priv, int i, 16331306821SNeil Armstrong enum phy_mode mode); 164a9fc15e0SNeil Armstrong static int dwc3_meson_gxl_usb2_init_phy(struct dwc3_meson_g12a *priv, int i, 165a9fc15e0SNeil Armstrong enum phy_mode mode); 16631306821SNeil Armstrong 16731306821SNeil Armstrong static int dwc3_meson_g12a_set_phy_mode(struct dwc3_meson_g12a *priv, 16831306821SNeil Armstrong int i, enum phy_mode mode); 169a9fc15e0SNeil Armstrong static int dwc3_meson_gxl_set_phy_mode(struct dwc3_meson_g12a *priv, 170a9fc15e0SNeil Armstrong int i, enum phy_mode mode); 17131306821SNeil Armstrong 1725b0ba0caSNeil Armstrong static int dwc3_meson_g12a_usb_init(struct dwc3_meson_g12a *priv); 173a9fc15e0SNeil Armstrong static int dwc3_meson_gxl_usb_init(struct dwc3_meson_g12a *priv); 174a9fc15e0SNeil Armstrong 175a9fc15e0SNeil Armstrong static int dwc3_meson_gxl_usb_post_init(struct dwc3_meson_g12a *priv); 1765b0ba0caSNeil Armstrong 177df7e3745SNeil Armstrong /* 178df7e3745SNeil Armstrong * For GXL and GXM SoCs: 179df7e3745SNeil Armstrong * USB Phy muxing between the DWC2 Device controller and the DWC3 Host 180df7e3745SNeil Armstrong * controller is buggy when switching from Device to Host when USB port 181df7e3745SNeil Armstrong * is unpopulated, it causes the DWC3 to hard crash. 182df7e3745SNeil Armstrong * When populated (including OTG switching with ID pin), the switch works 183df7e3745SNeil Armstrong * like a charm like on the G12A platforms. 184df7e3745SNeil Armstrong * In order to still switch from Host to Device on an USB Type-A port, 185df7e3745SNeil Armstrong * an U2_PORT_DISABLE bit has been added to disconnect the DWC3 Host 186df7e3745SNeil Armstrong * controller from the port, but when used the DWC3 controller must be 187df7e3745SNeil Armstrong * reset to recover usage of the port. 188df7e3745SNeil Armstrong */ 189df7e3745SNeil Armstrong 190a9fc15e0SNeil Armstrong static struct dwc3_meson_g12a_drvdata gxl_drvdata = { 191a9fc15e0SNeil Armstrong .otg_switch_supported = true, 192a9fc15e0SNeil Armstrong .otg_phy_host_port_disable = true, 193a9fc15e0SNeil Armstrong .clks = meson_gxl_clocks, 194a9fc15e0SNeil Armstrong .num_clks = ARRAY_SIZE(meson_g12a_clocks), 195a9fc15e0SNeil Armstrong .phy_names = meson_a1_phy_names, 196a9fc15e0SNeil Armstrong .num_phys = ARRAY_SIZE(meson_a1_phy_names), 197a9fc15e0SNeil Armstrong .setup_regmaps = dwc3_meson_gxl_setup_regmaps, 198a9fc15e0SNeil Armstrong .usb2_init_phy = dwc3_meson_gxl_usb2_init_phy, 199a9fc15e0SNeil Armstrong .set_phy_mode = dwc3_meson_gxl_set_phy_mode, 200a9fc15e0SNeil Armstrong .usb_init = dwc3_meson_gxl_usb_init, 201a9fc15e0SNeil Armstrong .usb_post_init = dwc3_meson_gxl_usb_post_init, 202a9fc15e0SNeil Armstrong }; 203a9fc15e0SNeil Armstrong 204a9fc15e0SNeil Armstrong static struct dwc3_meson_g12a_drvdata gxm_drvdata = { 205a9fc15e0SNeil Armstrong .otg_switch_supported = true, 206a9fc15e0SNeil Armstrong .otg_phy_host_port_disable = true, 207a9fc15e0SNeil Armstrong .clks = meson_gxl_clocks, 208a9fc15e0SNeil Armstrong .num_clks = ARRAY_SIZE(meson_g12a_clocks), 209a9fc15e0SNeil Armstrong .phy_names = meson_gxm_phy_names, 210a9fc15e0SNeil Armstrong .num_phys = ARRAY_SIZE(meson_gxm_phy_names), 211a9fc15e0SNeil Armstrong .setup_regmaps = dwc3_meson_gxl_setup_regmaps, 212a9fc15e0SNeil Armstrong .usb2_init_phy = dwc3_meson_gxl_usb2_init_phy, 213a9fc15e0SNeil Armstrong .set_phy_mode = dwc3_meson_gxl_set_phy_mode, 214a9fc15e0SNeil Armstrong .usb_init = dwc3_meson_gxl_usb_init, 215a9fc15e0SNeil Armstrong .usb_post_init = dwc3_meson_gxl_usb_post_init, 216a9fc15e0SNeil Armstrong }; 217a9fc15e0SNeil Armstrong 2181e355f21SHanjie Lin static struct dwc3_meson_g12a_drvdata g12a_drvdata = { 2191e355f21SHanjie Lin .otg_switch_supported = true, 2201e355f21SHanjie Lin .clks = meson_g12a_clocks, 2211e355f21SHanjie Lin .num_clks = ARRAY_SIZE(meson_g12a_clocks), 2225174564cSNeil Armstrong .phy_names = meson_g12a_phy_names, 2235174564cSNeil Armstrong .num_phys = ARRAY_SIZE(meson_g12a_phy_names), 224013af227SNeil Armstrong .setup_regmaps = dwc3_meson_g12a_setup_regmaps, 22531306821SNeil Armstrong .usb2_init_phy = dwc3_meson_g12a_usb2_init_phy, 22631306821SNeil Armstrong .set_phy_mode = dwc3_meson_g12a_set_phy_mode, 2275b0ba0caSNeil Armstrong .usb_init = dwc3_meson_g12a_usb_init, 2281e355f21SHanjie Lin }; 2291e355f21SHanjie Lin 2301e355f21SHanjie Lin static struct dwc3_meson_g12a_drvdata a1_drvdata = { 2311e355f21SHanjie Lin .otg_switch_supported = false, 2321e355f21SHanjie Lin .clks = meson_a1_clocks, 2331e355f21SHanjie Lin .num_clks = ARRAY_SIZE(meson_a1_clocks), 2345174564cSNeil Armstrong .phy_names = meson_a1_phy_names, 2355174564cSNeil Armstrong .num_phys = ARRAY_SIZE(meson_a1_phy_names), 236013af227SNeil Armstrong .setup_regmaps = dwc3_meson_g12a_setup_regmaps, 23731306821SNeil Armstrong .usb2_init_phy = dwc3_meson_g12a_usb2_init_phy, 23831306821SNeil Armstrong .set_phy_mode = dwc3_meson_g12a_set_phy_mode, 2395b0ba0caSNeil Armstrong .usb_init = dwc3_meson_g12a_usb_init, 2401e355f21SHanjie Lin }; 2411e355f21SHanjie Lin 242c9999337SNeil Armstrong struct dwc3_meson_g12a { 243c9999337SNeil Armstrong struct device *dev; 244013af227SNeil Armstrong struct regmap *u2p_regmap[PHY_COUNT]; 245013af227SNeil Armstrong struct regmap *usb_glue_regmap; 246c9999337SNeil Armstrong struct reset_control *reset; 247c9999337SNeil Armstrong struct phy *phys[PHY_COUNT]; 248c9999337SNeil Armstrong enum usb_dr_mode otg_mode; 249c9999337SNeil Armstrong enum phy_mode otg_phy_mode; 250c9999337SNeil Armstrong unsigned int usb2_ports; 251c9999337SNeil Armstrong unsigned int usb3_ports; 252c9999337SNeil Armstrong struct regulator *vbus; 253c9999337SNeil Armstrong struct usb_role_switch_desc switch_desc; 254c9999337SNeil Armstrong struct usb_role_switch *role_switch; 2551e355f21SHanjie Lin const struct dwc3_meson_g12a_drvdata *drvdata; 256c9999337SNeil Armstrong }; 257c9999337SNeil Armstrong 258a9fc15e0SNeil Armstrong static int dwc3_meson_gxl_set_phy_mode(struct dwc3_meson_g12a *priv, 259a9fc15e0SNeil Armstrong int i, enum phy_mode mode) 260a9fc15e0SNeil Armstrong { 261a9fc15e0SNeil Armstrong return phy_set_mode(priv->phys[i], mode); 262a9fc15e0SNeil Armstrong } 263a9fc15e0SNeil Armstrong 264a9fc15e0SNeil Armstrong static int dwc3_meson_gxl_usb2_init_phy(struct dwc3_meson_g12a *priv, int i, 265a9fc15e0SNeil Armstrong enum phy_mode mode) 266a9fc15e0SNeil Armstrong { 267a9fc15e0SNeil Armstrong /* On GXL PHY must be started in device mode for DWC2 init */ 268a9fc15e0SNeil Armstrong return priv->drvdata->set_phy_mode(priv, i, 269a9fc15e0SNeil Armstrong (i == USB2_OTG_PHY) ? PHY_MODE_USB_DEVICE 270a9fc15e0SNeil Armstrong : PHY_MODE_USB_HOST); 271a9fc15e0SNeil Armstrong } 272a9fc15e0SNeil Armstrong 27331306821SNeil Armstrong static int dwc3_meson_g12a_set_phy_mode(struct dwc3_meson_g12a *priv, 274c9999337SNeil Armstrong int i, enum phy_mode mode) 275c9999337SNeil Armstrong { 276c9999337SNeil Armstrong if (mode == PHY_MODE_USB_HOST) 277013af227SNeil Armstrong regmap_update_bits(priv->u2p_regmap[i], U2P_R0, 278c9999337SNeil Armstrong U2P_R0_HOST_DEVICE, 279c9999337SNeil Armstrong U2P_R0_HOST_DEVICE); 280c9999337SNeil Armstrong else 281013af227SNeil Armstrong regmap_update_bits(priv->u2p_regmap[i], U2P_R0, 282c9999337SNeil Armstrong U2P_R0_HOST_DEVICE, 0); 28331306821SNeil Armstrong 28431306821SNeil Armstrong return 0; 28531306821SNeil Armstrong } 28631306821SNeil Armstrong 28731306821SNeil Armstrong static int dwc3_meson_g12a_usb2_init_phy(struct dwc3_meson_g12a *priv, int i, 28831306821SNeil Armstrong enum phy_mode mode) 28931306821SNeil Armstrong { 29031306821SNeil Armstrong int ret; 29131306821SNeil Armstrong 29231306821SNeil Armstrong regmap_update_bits(priv->u2p_regmap[i], U2P_R0, 29331306821SNeil Armstrong U2P_R0_POWER_ON_RESET, 29431306821SNeil Armstrong U2P_R0_POWER_ON_RESET); 29531306821SNeil Armstrong 29631306821SNeil Armstrong if (priv->drvdata->otg_switch_supported && i == USB2_OTG_PHY) { 29731306821SNeil Armstrong regmap_update_bits(priv->u2p_regmap[i], U2P_R0, 29831306821SNeil Armstrong U2P_R0_ID_PULLUP | U2P_R0_DRV_VBUS, 29931306821SNeil Armstrong U2P_R0_ID_PULLUP | U2P_R0_DRV_VBUS); 30031306821SNeil Armstrong 30131306821SNeil Armstrong ret = priv->drvdata->set_phy_mode(priv, i, mode); 30231306821SNeil Armstrong } else 30331306821SNeil Armstrong ret = priv->drvdata->set_phy_mode(priv, i, 30431306821SNeil Armstrong PHY_MODE_USB_HOST); 30531306821SNeil Armstrong 30631306821SNeil Armstrong if (ret) 30731306821SNeil Armstrong return ret; 30831306821SNeil Armstrong 30931306821SNeil Armstrong regmap_update_bits(priv->u2p_regmap[i], U2P_R0, 31031306821SNeil Armstrong U2P_R0_POWER_ON_RESET, 0); 31131306821SNeil Armstrong 31231306821SNeil Armstrong return 0; 313c9999337SNeil Armstrong } 314c9999337SNeil Armstrong 3155b0ba0caSNeil Armstrong static int dwc3_meson_g12a_usb2_init(struct dwc3_meson_g12a *priv, 3165b0ba0caSNeil Armstrong enum phy_mode mode) 317c9999337SNeil Armstrong { 31831306821SNeil Armstrong int i, ret; 319c9999337SNeil Armstrong 3205174564cSNeil Armstrong for (i = 0; i < priv->drvdata->num_phys; ++i) { 321c9999337SNeil Armstrong if (!priv->phys[i]) 322c9999337SNeil Armstrong continue; 323c9999337SNeil Armstrong 3245174564cSNeil Armstrong if (!strstr(priv->drvdata->phy_names[i], "usb2")) 3255174564cSNeil Armstrong continue; 3265174564cSNeil Armstrong 3275b0ba0caSNeil Armstrong ret = priv->drvdata->usb2_init_phy(priv, i, mode); 32831306821SNeil Armstrong if (ret) 32931306821SNeil Armstrong return ret; 330c9999337SNeil Armstrong } 331c9999337SNeil Armstrong 332c9999337SNeil Armstrong return 0; 333c9999337SNeil Armstrong } 334c9999337SNeil Armstrong 335c9999337SNeil Armstrong static void dwc3_meson_g12a_usb3_init(struct dwc3_meson_g12a *priv) 336c9999337SNeil Armstrong { 337013af227SNeil Armstrong regmap_update_bits(priv->usb_glue_regmap, USB_R3, 338c9999337SNeil Armstrong USB_R3_P30_SSC_RANGE_MASK | 339c9999337SNeil Armstrong USB_R3_P30_REF_SSP_EN, 340c9999337SNeil Armstrong USB_R3_P30_SSC_ENABLE | 341c9999337SNeil Armstrong FIELD_PREP(USB_R3_P30_SSC_RANGE_MASK, 2) | 342c9999337SNeil Armstrong USB_R3_P30_REF_SSP_EN); 343c9999337SNeil Armstrong udelay(2); 344c9999337SNeil Armstrong 345013af227SNeil Armstrong regmap_update_bits(priv->usb_glue_regmap, USB_R2, 346c9999337SNeil Armstrong USB_R2_P30_PCS_TX_DEEMPH_3P5DB_MASK, 347c9999337SNeil Armstrong FIELD_PREP(USB_R2_P30_PCS_TX_DEEMPH_3P5DB_MASK, 0x15)); 348c9999337SNeil Armstrong 349013af227SNeil Armstrong regmap_update_bits(priv->usb_glue_regmap, USB_R2, 350c9999337SNeil Armstrong USB_R2_P30_PCS_TX_DEEMPH_6DB_MASK, 351c9999337SNeil Armstrong FIELD_PREP(USB_R2_P30_PCS_TX_DEEMPH_6DB_MASK, 0x20)); 352c9999337SNeil Armstrong 353c9999337SNeil Armstrong udelay(2); 354c9999337SNeil Armstrong 355013af227SNeil Armstrong regmap_update_bits(priv->usb_glue_regmap, USB_R1, 356c9999337SNeil Armstrong USB_R1_U3H_HOST_PORT_POWER_CONTROL_PRESENT, 357c9999337SNeil Armstrong USB_R1_U3H_HOST_PORT_POWER_CONTROL_PRESENT); 358c9999337SNeil Armstrong 359013af227SNeil Armstrong regmap_update_bits(priv->usb_glue_regmap, USB_R1, 360c9999337SNeil Armstrong USB_R1_P30_PCS_TX_SWING_FULL_MASK, 361c9999337SNeil Armstrong FIELD_PREP(USB_R1_P30_PCS_TX_SWING_FULL_MASK, 127)); 362c9999337SNeil Armstrong } 363c9999337SNeil Armstrong 3645b0ba0caSNeil Armstrong static void dwc3_meson_g12a_usb_otg_apply_mode(struct dwc3_meson_g12a *priv, 3655b0ba0caSNeil Armstrong enum phy_mode mode) 366c9999337SNeil Armstrong { 3675b0ba0caSNeil Armstrong if (mode == PHY_MODE_USB_DEVICE) { 368df7e3745SNeil Armstrong if (priv->otg_mode != USB_DR_MODE_OTG && 369df7e3745SNeil Armstrong priv->drvdata->otg_phy_host_port_disable) 370df7e3745SNeil Armstrong /* Isolate the OTG PHY port from the Host Controller */ 371df7e3745SNeil Armstrong regmap_update_bits(priv->usb_glue_regmap, USB_R1, 372df7e3745SNeil Armstrong USB_R1_U3H_HOST_U2_PORT_DISABLE_MASK, 373df7e3745SNeil Armstrong FIELD_PREP(USB_R1_U3H_HOST_U2_PORT_DISABLE_MASK, 374df7e3745SNeil Armstrong BIT(USB2_OTG_PHY))); 375df7e3745SNeil Armstrong 376013af227SNeil Armstrong regmap_update_bits(priv->usb_glue_regmap, USB_R0, 377c9999337SNeil Armstrong USB_R0_U2D_ACT, USB_R0_U2D_ACT); 378013af227SNeil Armstrong regmap_update_bits(priv->usb_glue_regmap, USB_R0, 379c9999337SNeil Armstrong USB_R0_U2D_SS_SCALEDOWN_MODE_MASK, 0); 380013af227SNeil Armstrong regmap_update_bits(priv->usb_glue_regmap, USB_R4, 381c9999337SNeil Armstrong USB_R4_P21_SLEEP_M0, USB_R4_P21_SLEEP_M0); 382c9999337SNeil Armstrong } else { 383df7e3745SNeil Armstrong if (priv->otg_mode != USB_DR_MODE_OTG && 384df7e3745SNeil Armstrong priv->drvdata->otg_phy_host_port_disable) { 385df7e3745SNeil Armstrong regmap_update_bits(priv->usb_glue_regmap, USB_R1, 386df7e3745SNeil Armstrong USB_R1_U3H_HOST_U2_PORT_DISABLE_MASK, 0); 387df7e3745SNeil Armstrong msleep(500); 388df7e3745SNeil Armstrong } 389013af227SNeil Armstrong regmap_update_bits(priv->usb_glue_regmap, USB_R0, 390c9999337SNeil Armstrong USB_R0_U2D_ACT, 0); 391013af227SNeil Armstrong regmap_update_bits(priv->usb_glue_regmap, USB_R4, 392c9999337SNeil Armstrong USB_R4_P21_SLEEP_M0, 0); 393c9999337SNeil Armstrong } 394c9999337SNeil Armstrong } 395c9999337SNeil Armstrong 3965b0ba0caSNeil Armstrong static int dwc3_meson_g12a_usb_init_glue(struct dwc3_meson_g12a *priv, 3975b0ba0caSNeil Armstrong enum phy_mode mode) 398c9999337SNeil Armstrong { 399c9999337SNeil Armstrong int ret; 400c9999337SNeil Armstrong 4015b0ba0caSNeil Armstrong ret = dwc3_meson_g12a_usb2_init(priv, mode); 402c9999337SNeil Armstrong if (ret) 403c9999337SNeil Armstrong return ret; 404c9999337SNeil Armstrong 405013af227SNeil Armstrong regmap_update_bits(priv->usb_glue_regmap, USB_R1, 406c9999337SNeil Armstrong USB_R1_U3H_FLADJ_30MHZ_REG_MASK, 407c9999337SNeil Armstrong FIELD_PREP(USB_R1_U3H_FLADJ_30MHZ_REG_MASK, 0x20)); 408c9999337SNeil Armstrong 409013af227SNeil Armstrong regmap_update_bits(priv->usb_glue_regmap, USB_R5, 410c9999337SNeil Armstrong USB_R5_ID_DIG_EN_0, 411c9999337SNeil Armstrong USB_R5_ID_DIG_EN_0); 412013af227SNeil Armstrong regmap_update_bits(priv->usb_glue_regmap, USB_R5, 413c9999337SNeil Armstrong USB_R5_ID_DIG_EN_1, 414c9999337SNeil Armstrong USB_R5_ID_DIG_EN_1); 415013af227SNeil Armstrong regmap_update_bits(priv->usb_glue_regmap, USB_R5, 416c9999337SNeil Armstrong USB_R5_ID_DIG_TH_MASK, 417c9999337SNeil Armstrong FIELD_PREP(USB_R5_ID_DIG_TH_MASK, 0xff)); 418c9999337SNeil Armstrong 419c9999337SNeil Armstrong /* If we have an actual SuperSpeed port, initialize it */ 420c9999337SNeil Armstrong if (priv->usb3_ports) 421c9999337SNeil Armstrong dwc3_meson_g12a_usb3_init(priv); 422c9999337SNeil Armstrong 4235b0ba0caSNeil Armstrong dwc3_meson_g12a_usb_otg_apply_mode(priv, mode); 424c9999337SNeil Armstrong 425c9999337SNeil Armstrong return 0; 426c9999337SNeil Armstrong } 427c9999337SNeil Armstrong 428013af227SNeil Armstrong static const struct regmap_config phy_meson_g12a_usb_glue_regmap_conf = { 429013af227SNeil Armstrong .name = "usb-glue", 430c9999337SNeil Armstrong .reg_bits = 8, 431c9999337SNeil Armstrong .val_bits = 32, 432c9999337SNeil Armstrong .reg_stride = 4, 433c9999337SNeil Armstrong .max_register = USB_R5, 434c9999337SNeil Armstrong }; 435c9999337SNeil Armstrong 436c9999337SNeil Armstrong static int dwc3_meson_g12a_get_phys(struct dwc3_meson_g12a *priv) 437c9999337SNeil Armstrong { 4385174564cSNeil Armstrong const char *phy_name; 439c9999337SNeil Armstrong int i; 440c9999337SNeil Armstrong 4415174564cSNeil Armstrong for (i = 0 ; i < priv->drvdata->num_phys ; ++i) { 4425174564cSNeil Armstrong phy_name = priv->drvdata->phy_names[i]; 4435174564cSNeil Armstrong priv->phys[i] = devm_phy_optional_get(priv->dev, phy_name); 444c9999337SNeil Armstrong if (!priv->phys[i]) 445c9999337SNeil Armstrong continue; 446c9999337SNeil Armstrong 447c9999337SNeil Armstrong if (IS_ERR(priv->phys[i])) 448c9999337SNeil Armstrong return PTR_ERR(priv->phys[i]); 449c9999337SNeil Armstrong 4505174564cSNeil Armstrong if (strstr(phy_name, "usb3")) 451c9999337SNeil Armstrong priv->usb3_ports++; 452c9999337SNeil Armstrong else 453c9999337SNeil Armstrong priv->usb2_ports++; 454c9999337SNeil Armstrong } 455c9999337SNeil Armstrong 456c9999337SNeil Armstrong dev_info(priv->dev, "USB2 ports: %d\n", priv->usb2_ports); 457c9999337SNeil Armstrong dev_info(priv->dev, "USB3 ports: %d\n", priv->usb3_ports); 458c9999337SNeil Armstrong 459c9999337SNeil Armstrong return 0; 460c9999337SNeil Armstrong } 461c9999337SNeil Armstrong 462c9999337SNeil Armstrong static enum phy_mode dwc3_meson_g12a_get_id(struct dwc3_meson_g12a *priv) 463c9999337SNeil Armstrong { 464c9999337SNeil Armstrong u32 reg; 465c9999337SNeil Armstrong 466013af227SNeil Armstrong regmap_read(priv->usb_glue_regmap, USB_R5, ®); 467c9999337SNeil Armstrong 468c9999337SNeil Armstrong if (reg & (USB_R5_ID_DIG_SYNC | USB_R5_ID_DIG_REG)) 469c9999337SNeil Armstrong return PHY_MODE_USB_DEVICE; 470c9999337SNeil Armstrong 471c9999337SNeil Armstrong return PHY_MODE_USB_HOST; 472c9999337SNeil Armstrong } 473c9999337SNeil Armstrong 474c9999337SNeil Armstrong static int dwc3_meson_g12a_otg_mode_set(struct dwc3_meson_g12a *priv, 475c9999337SNeil Armstrong enum phy_mode mode) 476c9999337SNeil Armstrong { 477c9999337SNeil Armstrong int ret; 478c9999337SNeil Armstrong 4791e355f21SHanjie Lin if (!priv->drvdata->otg_switch_supported || !priv->phys[USB2_OTG_PHY]) 480c9999337SNeil Armstrong return -EINVAL; 481c9999337SNeil Armstrong 482c9999337SNeil Armstrong if (mode == PHY_MODE_USB_HOST) 483c9999337SNeil Armstrong dev_info(priv->dev, "switching to Host Mode\n"); 484c9999337SNeil Armstrong else 485c9999337SNeil Armstrong dev_info(priv->dev, "switching to Device Mode\n"); 486c9999337SNeil Armstrong 487c9999337SNeil Armstrong if (priv->vbus) { 488c9999337SNeil Armstrong if (mode == PHY_MODE_USB_DEVICE) 489c9999337SNeil Armstrong ret = regulator_disable(priv->vbus); 490c9999337SNeil Armstrong else 491c9999337SNeil Armstrong ret = regulator_enable(priv->vbus); 492c9999337SNeil Armstrong if (ret) 493c9999337SNeil Armstrong return ret; 494c9999337SNeil Armstrong } 495c9999337SNeil Armstrong 496c9999337SNeil Armstrong priv->otg_phy_mode = mode; 497c9999337SNeil Armstrong 49831306821SNeil Armstrong ret = priv->drvdata->set_phy_mode(priv, USB2_OTG_PHY, mode); 49931306821SNeil Armstrong if (ret) 50031306821SNeil Armstrong return ret; 501c9999337SNeil Armstrong 5025b0ba0caSNeil Armstrong dwc3_meson_g12a_usb_otg_apply_mode(priv, mode); 503c9999337SNeil Armstrong 504c9999337SNeil Armstrong return 0; 505c9999337SNeil Armstrong } 506c9999337SNeil Armstrong 507bce3052fSHeikki Krogerus static int dwc3_meson_g12a_role_set(struct usb_role_switch *sw, 508bce3052fSHeikki Krogerus enum usb_role role) 509c9999337SNeil Armstrong { 510bce3052fSHeikki Krogerus struct dwc3_meson_g12a *priv = usb_role_switch_get_drvdata(sw); 511c9999337SNeil Armstrong enum phy_mode mode; 512c9999337SNeil Armstrong 513c9999337SNeil Armstrong if (role == USB_ROLE_NONE) 514c9999337SNeil Armstrong return 0; 515c9999337SNeil Armstrong 516c9999337SNeil Armstrong mode = (role == USB_ROLE_HOST) ? PHY_MODE_USB_HOST 517c9999337SNeil Armstrong : PHY_MODE_USB_DEVICE; 518c9999337SNeil Armstrong 519c9999337SNeil Armstrong if (mode == priv->otg_phy_mode) 520c9999337SNeil Armstrong return 0; 521c9999337SNeil Armstrong 522df7e3745SNeil Armstrong if (priv->drvdata->otg_phy_host_port_disable) 523e5ee93d4SFelipe Balbi dev_warn_once(priv->dev, "Broken manual OTG switch\n"); 524df7e3745SNeil Armstrong 525c9999337SNeil Armstrong return dwc3_meson_g12a_otg_mode_set(priv, mode); 526c9999337SNeil Armstrong } 527c9999337SNeil Armstrong 528bce3052fSHeikki Krogerus static enum usb_role dwc3_meson_g12a_role_get(struct usb_role_switch *sw) 529c9999337SNeil Armstrong { 530bce3052fSHeikki Krogerus struct dwc3_meson_g12a *priv = usb_role_switch_get_drvdata(sw); 531c9999337SNeil Armstrong 532c9999337SNeil Armstrong return priv->otg_phy_mode == PHY_MODE_USB_HOST ? 533c9999337SNeil Armstrong USB_ROLE_HOST : USB_ROLE_DEVICE; 534c9999337SNeil Armstrong } 535c9999337SNeil Armstrong 536f90db107SNeil Armstrong static irqreturn_t dwc3_meson_g12a_irq_thread(int irq, void *data) 537f90db107SNeil Armstrong { 538f90db107SNeil Armstrong struct dwc3_meson_g12a *priv = data; 539f90db107SNeil Armstrong enum phy_mode otg_id; 540f90db107SNeil Armstrong 541f90db107SNeil Armstrong otg_id = dwc3_meson_g12a_get_id(priv); 542f90db107SNeil Armstrong if (otg_id != priv->otg_phy_mode) { 543f90db107SNeil Armstrong if (dwc3_meson_g12a_otg_mode_set(priv, otg_id)) 544f90db107SNeil Armstrong dev_warn(priv->dev, "Failed to switch OTG mode\n"); 545f90db107SNeil Armstrong } 546f90db107SNeil Armstrong 547013af227SNeil Armstrong regmap_update_bits(priv->usb_glue_regmap, USB_R5, 548013af227SNeil Armstrong USB_R5_ID_DIG_IRQ, 0); 549f90db107SNeil Armstrong 550f90db107SNeil Armstrong return IRQ_HANDLED; 551f90db107SNeil Armstrong } 552f90db107SNeil Armstrong 553c9999337SNeil Armstrong static struct device *dwc3_meson_g12_find_child(struct device *dev, 554c9999337SNeil Armstrong const char *compatible) 555c9999337SNeil Armstrong { 556c9999337SNeil Armstrong struct platform_device *pdev; 557c9999337SNeil Armstrong struct device_node *np; 558c9999337SNeil Armstrong 559c9999337SNeil Armstrong np = of_get_compatible_child(dev->of_node, compatible); 560c9999337SNeil Armstrong if (!np) 561c9999337SNeil Armstrong return NULL; 562c9999337SNeil Armstrong 563c9999337SNeil Armstrong pdev = of_find_device_by_node(np); 564c9999337SNeil Armstrong of_node_put(np); 565c9999337SNeil Armstrong if (!pdev) 566c9999337SNeil Armstrong return NULL; 567c9999337SNeil Armstrong 568c9999337SNeil Armstrong return &pdev->dev; 569c9999337SNeil Armstrong } 570c9999337SNeil Armstrong 5711e355f21SHanjie Lin static int dwc3_meson_g12a_otg_init(struct platform_device *pdev, 5721e355f21SHanjie Lin struct dwc3_meson_g12a *priv) 573c9999337SNeil Armstrong { 574c9999337SNeil Armstrong enum phy_mode otg_id; 5751e355f21SHanjie Lin int ret, irq; 5761e355f21SHanjie Lin struct device *dev = &pdev->dev; 577c9999337SNeil Armstrong 5781e355f21SHanjie Lin if (!priv->drvdata->otg_switch_supported) 5791e355f21SHanjie Lin return 0; 580c9999337SNeil Armstrong 581f90db107SNeil Armstrong if (priv->otg_mode == USB_DR_MODE_OTG) { 582f90db107SNeil Armstrong /* Ack irq before registering */ 583013af227SNeil Armstrong regmap_update_bits(priv->usb_glue_regmap, USB_R5, 584f90db107SNeil Armstrong USB_R5_ID_DIG_IRQ, 0); 585f90db107SNeil Armstrong 586f90db107SNeil Armstrong irq = platform_get_irq(pdev, 0); 587f90db107SNeil Armstrong ret = devm_request_threaded_irq(&pdev->dev, irq, NULL, 588f90db107SNeil Armstrong dwc3_meson_g12a_irq_thread, 589f90db107SNeil Armstrong IRQF_ONESHOT, pdev->name, priv); 590f90db107SNeil Armstrong if (ret) 591f90db107SNeil Armstrong return ret; 592f90db107SNeil Armstrong } 593f90db107SNeil Armstrong 594c9999337SNeil Armstrong /* Setup OTG mode corresponding to the ID pin */ 595c9999337SNeil Armstrong if (priv->otg_mode == USB_DR_MODE_OTG) { 596c9999337SNeil Armstrong otg_id = dwc3_meson_g12a_get_id(priv); 597c9999337SNeil Armstrong if (otg_id != priv->otg_phy_mode) { 598c9999337SNeil Armstrong if (dwc3_meson_g12a_otg_mode_set(priv, otg_id)) 599c9999337SNeil Armstrong dev_warn(dev, "Failed to switch OTG mode\n"); 600c9999337SNeil Armstrong } 601c9999337SNeil Armstrong } 602c9999337SNeil Armstrong 603c9999337SNeil Armstrong /* Setup role switcher */ 604c9999337SNeil Armstrong priv->switch_desc.usb2_port = dwc3_meson_g12_find_child(dev, 605c9999337SNeil Armstrong "snps,dwc3"); 606c9999337SNeil Armstrong priv->switch_desc.udc = dwc3_meson_g12_find_child(dev, "snps,dwc2"); 607c9999337SNeil Armstrong priv->switch_desc.allow_userspace_control = true; 608c9999337SNeil Armstrong priv->switch_desc.set = dwc3_meson_g12a_role_set; 609c9999337SNeil Armstrong priv->switch_desc.get = dwc3_meson_g12a_role_get; 610bce3052fSHeikki Krogerus priv->switch_desc.driver_data = priv; 611c9999337SNeil Armstrong 612c9999337SNeil Armstrong priv->role_switch = usb_role_switch_register(dev, &priv->switch_desc); 613c9999337SNeil Armstrong if (IS_ERR(priv->role_switch)) 614c9999337SNeil Armstrong dev_warn(dev, "Unable to register Role Switch\n"); 615c9999337SNeil Armstrong 616238d7602SNathan Chancellor return 0; 6171e355f21SHanjie Lin } 6181e355f21SHanjie Lin 619a9fc15e0SNeil Armstrong static int dwc3_meson_gxl_setup_regmaps(struct dwc3_meson_g12a *priv, 620a9fc15e0SNeil Armstrong void __iomem *base) 621a9fc15e0SNeil Armstrong { 622a9fc15e0SNeil Armstrong /* GXL controls the PHY mode in the PHY registers unlike G12A */ 623a9fc15e0SNeil Armstrong priv->usb_glue_regmap = devm_regmap_init_mmio(priv->dev, base, 624a9fc15e0SNeil Armstrong &phy_meson_g12a_usb_glue_regmap_conf); 625a793cf81SFelipe Balbi return PTR_ERR_OR_ZERO(priv->usb_glue_regmap); 626a9fc15e0SNeil Armstrong } 627a9fc15e0SNeil Armstrong 628013af227SNeil Armstrong static int dwc3_meson_g12a_setup_regmaps(struct dwc3_meson_g12a *priv, 629013af227SNeil Armstrong void __iomem *base) 630013af227SNeil Armstrong { 631013af227SNeil Armstrong int i; 632013af227SNeil Armstrong 633013af227SNeil Armstrong priv->usb_glue_regmap = devm_regmap_init_mmio(priv->dev, 634013af227SNeil Armstrong base + G12A_GLUE_OFFSET, 635013af227SNeil Armstrong &phy_meson_g12a_usb_glue_regmap_conf); 636013af227SNeil Armstrong if (IS_ERR(priv->usb_glue_regmap)) 637013af227SNeil Armstrong return PTR_ERR(priv->usb_glue_regmap); 638013af227SNeil Armstrong 639013af227SNeil Armstrong /* Create a regmap for each USB2 PHY control register set */ 640013af227SNeil Armstrong for (i = 0; i < priv->usb2_ports; i++) { 641013af227SNeil Armstrong struct regmap_config u2p_regmap_config = { 642013af227SNeil Armstrong .reg_bits = 8, 643013af227SNeil Armstrong .val_bits = 32, 644013af227SNeil Armstrong .reg_stride = 4, 645013af227SNeil Armstrong .max_register = U2P_R1, 646013af227SNeil Armstrong }; 647013af227SNeil Armstrong 648013af227SNeil Armstrong u2p_regmap_config.name = devm_kasprintf(priv->dev, GFP_KERNEL, 649013af227SNeil Armstrong "u2p-%d", i); 650013af227SNeil Armstrong if (!u2p_regmap_config.name) 651013af227SNeil Armstrong return -ENOMEM; 652013af227SNeil Armstrong 653013af227SNeil Armstrong priv->u2p_regmap[i] = devm_regmap_init_mmio(priv->dev, 654013af227SNeil Armstrong base + (i * U2P_REG_SIZE), 655013af227SNeil Armstrong &u2p_regmap_config); 656013af227SNeil Armstrong if (IS_ERR(priv->u2p_regmap[i])) 657013af227SNeil Armstrong return PTR_ERR(priv->u2p_regmap[i]); 658013af227SNeil Armstrong } 659013af227SNeil Armstrong 660013af227SNeil Armstrong return 0; 661013af227SNeil Armstrong } 662013af227SNeil Armstrong 6635b0ba0caSNeil Armstrong static int dwc3_meson_g12a_usb_init(struct dwc3_meson_g12a *priv) 6645b0ba0caSNeil Armstrong { 6655b0ba0caSNeil Armstrong return dwc3_meson_g12a_usb_init_glue(priv, priv->otg_phy_mode); 6665b0ba0caSNeil Armstrong } 6675b0ba0caSNeil Armstrong 668a9fc15e0SNeil Armstrong static int dwc3_meson_gxl_usb_init(struct dwc3_meson_g12a *priv) 669a9fc15e0SNeil Armstrong { 670a9fc15e0SNeil Armstrong return dwc3_meson_g12a_usb_init_glue(priv, PHY_MODE_USB_DEVICE); 671a9fc15e0SNeil Armstrong } 672a9fc15e0SNeil Armstrong 673a9fc15e0SNeil Armstrong static int dwc3_meson_gxl_usb_post_init(struct dwc3_meson_g12a *priv) 674a9fc15e0SNeil Armstrong { 675a9fc15e0SNeil Armstrong int ret; 676a9fc15e0SNeil Armstrong 677a9fc15e0SNeil Armstrong ret = priv->drvdata->set_phy_mode(priv, USB2_OTG_PHY, 678a9fc15e0SNeil Armstrong priv->otg_phy_mode); 679a9fc15e0SNeil Armstrong if (ret) 680a9fc15e0SNeil Armstrong return ret; 681a9fc15e0SNeil Armstrong 682a9fc15e0SNeil Armstrong dwc3_meson_g12a_usb_otg_apply_mode(priv, priv->otg_phy_mode); 683a9fc15e0SNeil Armstrong 684a9fc15e0SNeil Armstrong return 0; 685a9fc15e0SNeil Armstrong } 686a9fc15e0SNeil Armstrong 6871e355f21SHanjie Lin static int dwc3_meson_g12a_probe(struct platform_device *pdev) 6881e355f21SHanjie Lin { 6891e355f21SHanjie Lin struct dwc3_meson_g12a *priv; 6901e355f21SHanjie Lin struct device *dev = &pdev->dev; 6911e355f21SHanjie Lin struct device_node *np = dev->of_node; 6921e355f21SHanjie Lin void __iomem *base; 6931e355f21SHanjie Lin int ret, i; 6941e355f21SHanjie Lin 6951e355f21SHanjie Lin priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); 6961e355f21SHanjie Lin if (!priv) 6971e355f21SHanjie Lin return -ENOMEM; 6981e355f21SHanjie Lin 6991e355f21SHanjie Lin base = devm_platform_ioremap_resource(pdev, 0); 7001e355f21SHanjie Lin if (IS_ERR(base)) 7011e355f21SHanjie Lin return PTR_ERR(base); 7021e355f21SHanjie Lin 703013af227SNeil Armstrong priv->drvdata = of_device_get_match_data(&pdev->dev); 704013af227SNeil Armstrong priv->dev = dev; 7051e355f21SHanjie Lin 7061e355f21SHanjie Lin priv->vbus = devm_regulator_get_optional(dev, "vbus"); 7071e355f21SHanjie Lin if (IS_ERR(priv->vbus)) { 7081e355f21SHanjie Lin if (PTR_ERR(priv->vbus) == -EPROBE_DEFER) 7091e355f21SHanjie Lin return PTR_ERR(priv->vbus); 7101e355f21SHanjie Lin priv->vbus = NULL; 7111e355f21SHanjie Lin } 7121e355f21SHanjie Lin 7131e355f21SHanjie Lin ret = devm_clk_bulk_get(dev, 7141e355f21SHanjie Lin priv->drvdata->num_clks, 7151e355f21SHanjie Lin priv->drvdata->clks); 7161e355f21SHanjie Lin if (ret) 7171e355f21SHanjie Lin return ret; 7181e355f21SHanjie Lin 7191e355f21SHanjie Lin ret = clk_bulk_prepare_enable(priv->drvdata->num_clks, 7201e355f21SHanjie Lin priv->drvdata->clks); 7211e355f21SHanjie Lin if (ret) 7221e355f21SHanjie Lin return ret; 7231e355f21SHanjie Lin 7241e355f21SHanjie Lin platform_set_drvdata(pdev, priv); 7251e355f21SHanjie Lin 7266d9fa35aSNeil Armstrong priv->reset = devm_reset_control_get_shared(dev, NULL); 7271e355f21SHanjie Lin if (IS_ERR(priv->reset)) { 7281e355f21SHanjie Lin ret = PTR_ERR(priv->reset); 7291e355f21SHanjie Lin dev_err(dev, "failed to get device reset, err=%d\n", ret); 730be8c1001SMartin Blumenstingl goto err_disable_clks; 7311e355f21SHanjie Lin } 7321e355f21SHanjie Lin 733a6498d51SAmjad Ouled-Ameur ret = reset_control_reset(priv->reset); 7341e355f21SHanjie Lin if (ret) 735a6498d51SAmjad Ouled-Ameur goto err_disable_clks; 7361e355f21SHanjie Lin 7371e355f21SHanjie Lin ret = dwc3_meson_g12a_get_phys(priv); 7381e355f21SHanjie Lin if (ret) 739a6498d51SAmjad Ouled-Ameur goto err_disable_clks; 7401e355f21SHanjie Lin 741347052e3SMartin Blumenstingl ret = priv->drvdata->setup_regmaps(priv, base); 742347052e3SMartin Blumenstingl if (ret) 743347052e3SMartin Blumenstingl return ret; 744347052e3SMartin Blumenstingl 7451e355f21SHanjie Lin if (priv->vbus) { 7461e355f21SHanjie Lin ret = regulator_enable(priv->vbus); 7471e355f21SHanjie Lin if (ret) 748a6498d51SAmjad Ouled-Ameur goto err_disable_clks; 7491e355f21SHanjie Lin } 7501e355f21SHanjie Lin 7511e355f21SHanjie Lin /* Get dr_mode */ 7521e355f21SHanjie Lin priv->otg_mode = usb_get_dr_mode(dev); 7531e355f21SHanjie Lin 7545b0ba0caSNeil Armstrong if (priv->otg_mode == USB_DR_MODE_PERIPHERAL) 7555b0ba0caSNeil Armstrong priv->otg_phy_mode = PHY_MODE_USB_DEVICE; 7565b0ba0caSNeil Armstrong else 7575b0ba0caSNeil Armstrong priv->otg_phy_mode = PHY_MODE_USB_HOST; 7585b0ba0caSNeil Armstrong 7595b0ba0caSNeil Armstrong ret = priv->drvdata->usb_init(priv); 7608f5bc1ecSNeil Armstrong if (ret) 761a6498d51SAmjad Ouled-Ameur goto err_disable_clks; 7621e355f21SHanjie Lin 7631e355f21SHanjie Lin /* Init PHYs */ 7641e355f21SHanjie Lin for (i = 0 ; i < PHY_COUNT ; ++i) { 7651e355f21SHanjie Lin ret = phy_init(priv->phys[i]); 7661e355f21SHanjie Lin if (ret) 767a6498d51SAmjad Ouled-Ameur goto err_disable_clks; 7681e355f21SHanjie Lin } 7691e355f21SHanjie Lin 7701e355f21SHanjie Lin /* Set PHY Power */ 7711e355f21SHanjie Lin for (i = 0 ; i < PHY_COUNT ; ++i) { 7721e355f21SHanjie Lin ret = phy_power_on(priv->phys[i]); 7731e355f21SHanjie Lin if (ret) 7741e355f21SHanjie Lin goto err_phys_exit; 7751e355f21SHanjie Lin } 7761e355f21SHanjie Lin 7775b0ba0caSNeil Armstrong if (priv->drvdata->usb_post_init) { 7785b0ba0caSNeil Armstrong ret = priv->drvdata->usb_post_init(priv); 7795b0ba0caSNeil Armstrong if (ret) 7805b0ba0caSNeil Armstrong goto err_phys_power; 7815b0ba0caSNeil Armstrong } 7825b0ba0caSNeil Armstrong 7831e355f21SHanjie Lin ret = of_platform_populate(np, NULL, NULL, dev); 7841e355f21SHanjie Lin if (ret) 7851e355f21SHanjie Lin goto err_phys_power; 7861e355f21SHanjie Lin 7871e355f21SHanjie Lin ret = dwc3_meson_g12a_otg_init(pdev, priv); 7881e355f21SHanjie Lin if (ret) 7891e355f21SHanjie Lin goto err_phys_power; 7901e355f21SHanjie Lin 791c9999337SNeil Armstrong pm_runtime_set_active(dev); 792c9999337SNeil Armstrong pm_runtime_enable(dev); 793c9999337SNeil Armstrong pm_runtime_get_sync(dev); 794c9999337SNeil Armstrong 795c9999337SNeil Armstrong return 0; 796c9999337SNeil Armstrong 797c9999337SNeil Armstrong err_phys_power: 798c9999337SNeil Armstrong for (i = 0 ; i < PHY_COUNT ; ++i) 799c9999337SNeil Armstrong phy_power_off(priv->phys[i]); 800c9999337SNeil Armstrong 801c9999337SNeil Armstrong err_phys_exit: 802c9999337SNeil Armstrong for (i = 0 ; i < PHY_COUNT ; ++i) 803c9999337SNeil Armstrong phy_exit(priv->phys[i]); 804c9999337SNeil Armstrong 8051e355f21SHanjie Lin err_disable_clks: 8061e355f21SHanjie Lin clk_bulk_disable_unprepare(priv->drvdata->num_clks, 8071e355f21SHanjie Lin priv->drvdata->clks); 8081e355f21SHanjie Lin 809c9999337SNeil Armstrong return ret; 810c9999337SNeil Armstrong } 811c9999337SNeil Armstrong 812c9999337SNeil Armstrong static int dwc3_meson_g12a_remove(struct platform_device *pdev) 813c9999337SNeil Armstrong { 814c9999337SNeil Armstrong struct dwc3_meson_g12a *priv = platform_get_drvdata(pdev); 815c9999337SNeil Armstrong struct device *dev = &pdev->dev; 816c9999337SNeil Armstrong int i; 817c9999337SNeil Armstrong 8181e355f21SHanjie Lin if (priv->drvdata->otg_switch_supported) 819c9999337SNeil Armstrong usb_role_switch_unregister(priv->role_switch); 820c9999337SNeil Armstrong 821c9999337SNeil Armstrong of_platform_depopulate(dev); 822c9999337SNeil Armstrong 823c9999337SNeil Armstrong for (i = 0 ; i < PHY_COUNT ; ++i) { 824c9999337SNeil Armstrong phy_power_off(priv->phys[i]); 825c9999337SNeil Armstrong phy_exit(priv->phys[i]); 826c9999337SNeil Armstrong } 827c9999337SNeil Armstrong 828c9999337SNeil Armstrong pm_runtime_disable(dev); 829c9999337SNeil Armstrong pm_runtime_put_noidle(dev); 830c9999337SNeil Armstrong pm_runtime_set_suspended(dev); 831c9999337SNeil Armstrong 8321e355f21SHanjie Lin clk_bulk_disable_unprepare(priv->drvdata->num_clks, 8331e355f21SHanjie Lin priv->drvdata->clks); 8341e355f21SHanjie Lin 835c9999337SNeil Armstrong return 0; 836c9999337SNeil Armstrong } 837c9999337SNeil Armstrong 838c9999337SNeil Armstrong static int __maybe_unused dwc3_meson_g12a_runtime_suspend(struct device *dev) 839c9999337SNeil Armstrong { 840c9999337SNeil Armstrong struct dwc3_meson_g12a *priv = dev_get_drvdata(dev); 841c9999337SNeil Armstrong 8421e355f21SHanjie Lin clk_bulk_disable_unprepare(priv->drvdata->num_clks, 8431e355f21SHanjie Lin priv->drvdata->clks); 844c9999337SNeil Armstrong 845c9999337SNeil Armstrong return 0; 846c9999337SNeil Armstrong } 847c9999337SNeil Armstrong 848c9999337SNeil Armstrong static int __maybe_unused dwc3_meson_g12a_runtime_resume(struct device *dev) 849c9999337SNeil Armstrong { 850c9999337SNeil Armstrong struct dwc3_meson_g12a *priv = dev_get_drvdata(dev); 851c9999337SNeil Armstrong 8521e355f21SHanjie Lin return clk_bulk_prepare_enable(priv->drvdata->num_clks, 8531e355f21SHanjie Lin priv->drvdata->clks); 854c9999337SNeil Armstrong } 855c9999337SNeil Armstrong 856c9999337SNeil Armstrong static int __maybe_unused dwc3_meson_g12a_suspend(struct device *dev) 857c9999337SNeil Armstrong { 858c9999337SNeil Armstrong struct dwc3_meson_g12a *priv = dev_get_drvdata(dev); 8591cf084d1SNeil Armstrong int i, ret; 8601cf084d1SNeil Armstrong 8611cf084d1SNeil Armstrong if (priv->vbus && priv->otg_phy_mode == PHY_MODE_USB_HOST) { 8621cf084d1SNeil Armstrong ret = regulator_disable(priv->vbus); 8631cf084d1SNeil Armstrong if (ret) 8641cf084d1SNeil Armstrong return ret; 8651cf084d1SNeil Armstrong } 866c9999337SNeil Armstrong 867c9999337SNeil Armstrong for (i = 0 ; i < PHY_COUNT ; ++i) { 868c9999337SNeil Armstrong phy_power_off(priv->phys[i]); 869c9999337SNeil Armstrong phy_exit(priv->phys[i]); 870c9999337SNeil Armstrong } 871c9999337SNeil Armstrong 872c9999337SNeil Armstrong reset_control_assert(priv->reset); 873c9999337SNeil Armstrong 874c9999337SNeil Armstrong return 0; 875c9999337SNeil Armstrong } 876c9999337SNeil Armstrong 877c9999337SNeil Armstrong static int __maybe_unused dwc3_meson_g12a_resume(struct device *dev) 878c9999337SNeil Armstrong { 879c9999337SNeil Armstrong struct dwc3_meson_g12a *priv = dev_get_drvdata(dev); 880c9999337SNeil Armstrong int i, ret; 881c9999337SNeil Armstrong 882c9999337SNeil Armstrong reset_control_deassert(priv->reset); 883c9999337SNeil Armstrong 8845b0ba0caSNeil Armstrong ret = priv->drvdata->usb_init(priv); 8855b0ba0caSNeil Armstrong if (ret) 8865b0ba0caSNeil Armstrong return ret; 887c9999337SNeil Armstrong 888c9999337SNeil Armstrong /* Init PHYs */ 889c9999337SNeil Armstrong for (i = 0 ; i < PHY_COUNT ; ++i) { 890c9999337SNeil Armstrong ret = phy_init(priv->phys[i]); 891c9999337SNeil Armstrong if (ret) 892c9999337SNeil Armstrong return ret; 893c9999337SNeil Armstrong } 894c9999337SNeil Armstrong 895c9999337SNeil Armstrong /* Set PHY Power */ 896c9999337SNeil Armstrong for (i = 0 ; i < PHY_COUNT ; ++i) { 897c9999337SNeil Armstrong ret = phy_power_on(priv->phys[i]); 898c9999337SNeil Armstrong if (ret) 899c9999337SNeil Armstrong return ret; 900c9999337SNeil Armstrong } 901c9999337SNeil Armstrong 9021cf084d1SNeil Armstrong if (priv->vbus && priv->otg_phy_mode == PHY_MODE_USB_HOST) { 9031cf084d1SNeil Armstrong ret = regulator_enable(priv->vbus); 9041cf084d1SNeil Armstrong if (ret) 9051cf084d1SNeil Armstrong return ret; 9061cf084d1SNeil Armstrong } 9071cf084d1SNeil Armstrong 908c9999337SNeil Armstrong return 0; 909c9999337SNeil Armstrong } 910c9999337SNeil Armstrong 911c9999337SNeil Armstrong static const struct dev_pm_ops dwc3_meson_g12a_dev_pm_ops = { 912c9999337SNeil Armstrong SET_SYSTEM_SLEEP_PM_OPS(dwc3_meson_g12a_suspend, dwc3_meson_g12a_resume) 913c9999337SNeil Armstrong SET_RUNTIME_PM_OPS(dwc3_meson_g12a_runtime_suspend, 914c9999337SNeil Armstrong dwc3_meson_g12a_runtime_resume, NULL) 915c9999337SNeil Armstrong }; 916c9999337SNeil Armstrong 917c9999337SNeil Armstrong static const struct of_device_id dwc3_meson_g12a_match[] = { 9181e355f21SHanjie Lin { 919a9fc15e0SNeil Armstrong .compatible = "amlogic,meson-gxl-usb-ctrl", 920a9fc15e0SNeil Armstrong .data = &gxl_drvdata, 921a9fc15e0SNeil Armstrong }, 922a9fc15e0SNeil Armstrong { 923a9fc15e0SNeil Armstrong .compatible = "amlogic,meson-gxm-usb-ctrl", 924a9fc15e0SNeil Armstrong .data = &gxm_drvdata, 925a9fc15e0SNeil Armstrong }, 926a9fc15e0SNeil Armstrong { 9271e355f21SHanjie Lin .compatible = "amlogic,meson-g12a-usb-ctrl", 9281e355f21SHanjie Lin .data = &g12a_drvdata, 9291e355f21SHanjie Lin }, 9301e355f21SHanjie Lin { 9311e355f21SHanjie Lin .compatible = "amlogic,meson-a1-usb-ctrl", 9321e355f21SHanjie Lin .data = &a1_drvdata, 9331e355f21SHanjie Lin }, 934c9999337SNeil Armstrong { /* Sentinel */ } 935c9999337SNeil Armstrong }; 936c9999337SNeil Armstrong MODULE_DEVICE_TABLE(of, dwc3_meson_g12a_match); 937c9999337SNeil Armstrong 938c9999337SNeil Armstrong static struct platform_driver dwc3_meson_g12a_driver = { 939c9999337SNeil Armstrong .probe = dwc3_meson_g12a_probe, 940c9999337SNeil Armstrong .remove = dwc3_meson_g12a_remove, 941c9999337SNeil Armstrong .driver = { 942c9999337SNeil Armstrong .name = "dwc3-meson-g12a", 943c9999337SNeil Armstrong .of_match_table = dwc3_meson_g12a_match, 944c9999337SNeil Armstrong .pm = &dwc3_meson_g12a_dev_pm_ops, 945c9999337SNeil Armstrong }, 946c9999337SNeil Armstrong }; 947c9999337SNeil Armstrong 948c9999337SNeil Armstrong module_platform_driver(dwc3_meson_g12a_driver); 949c9999337SNeil Armstrong MODULE_LICENSE("GPL v2"); 950c9999337SNeil Armstrong MODULE_DESCRIPTION("Amlogic Meson G12A USB Glue Layer"); 951c9999337SNeil Armstrong MODULE_AUTHOR("Neil Armstrong <narmstrong@baylibre.com>"); 952