// SPDX-License-Identifier: GPL-2.0 /* * phy-rtk-usb2.c RTK usb2.0 PHY driver * * Copyright (C) 2023 Realtek Semiconductor Corporation * */ #include #include #include #include #include #include #include #include #include #include #include #include /* GUSB2PHYACCn register */ #define PHY_NEW_REG_REQ BIT(25) #define PHY_VSTS_BUSY BIT(23) #define PHY_VCTRL_SHIFT 8 #define PHY_REG_DATA_MASK 0xff #define GET_LOW_NIBBLE(addr) ((addr) & 0x0f) #define GET_HIGH_NIBBLE(addr) (((addr) & 0xf0) >> 4) #define EFUS_USB_DC_CAL_RATE 2 #define EFUS_USB_DC_CAL_MAX 7 #define EFUS_USB_DC_DIS_RATE 1 #define EFUS_USB_DC_DIS_MAX 7 #define MAX_PHY_DATA_SIZE 20 #define OFFEST_PHY_READ 0x20 #define MAX_USB_PHY_NUM 4 #define MAX_USB_PHY_PAGE0_DATA_SIZE 16 #define MAX_USB_PHY_PAGE1_DATA_SIZE 16 #define MAX_USB_PHY_PAGE2_DATA_SIZE 8 #define SET_PAGE_OFFSET 0xf4 #define SET_PAGE_0 0x9b #define SET_PAGE_1 0xbb #define SET_PAGE_2 0xdb #define PAGE_START 0xe0 #define PAGE0_0XE4 0xe4 #define PAGE0_0XE6 0xe6 #define PAGE0_0XE7 0xe7 #define PAGE1_0XE0 0xe0 #define PAGE1_0XE2 0xe2 #define SENSITIVITY_CTRL (BIT(4) | BIT(5) | BIT(6)) #define ENABLE_AUTO_SENSITIVITY_CALIBRATION BIT(2) #define DEFAULT_DC_DRIVING_VALUE (0x8) #define DEFAULT_DC_DISCONNECTION_VALUE (0x6) #define HS_CLK_SELECT BIT(6) struct phy_reg { void __iomem *reg_wrap_vstatus; void __iomem *reg_gusb2phyacc0; int vstatus_index; }; struct phy_data { u8 addr; u8 data; }; struct phy_cfg { int page0_size; struct phy_data page0[MAX_USB_PHY_PAGE0_DATA_SIZE]; int page1_size; struct phy_data page1[MAX_USB_PHY_PAGE1_DATA_SIZE]; int page2_size; struct phy_data page2[MAX_USB_PHY_PAGE2_DATA_SIZE]; int num_phy; bool check_efuse; int check_efuse_version; #define CHECK_EFUSE_V1 1 #define CHECK_EFUSE_V2 2 int efuse_dc_driving_rate; int efuse_dc_disconnect_rate; int dc_driving_mask; int dc_disconnect_mask; bool usb_dc_disconnect_at_page0; int driving_updated_for_dev_dis; bool do_toggle; bool do_toggle_driving; bool use_default_parameter; bool is_double_sensitivity_mode; }; struct phy_parameter { struct phy_reg phy_reg; /* Get from efuse */ s8 efuse_usb_dc_cal; s8 efuse_usb_dc_dis; /* Get from dts */ bool inverse_hstx_sync_clock; u32 driving_level; s32 driving_level_compensate; s32 disconnection_compensate; }; struct rtk_phy { struct device *dev; struct phy_cfg *phy_cfg; int num_phy; struct phy_parameter *phy_parameter; struct dentry *debug_dir; }; /* mapping 0xE0 to 0 ... 0xE7 to 7, 0xF0 to 8 ,,, 0xF7 to 15 */ static inline int page_addr_to_array_index(u8 addr) { return (int)((((addr) - PAGE_START) & 0x7) + ((((addr) - PAGE_START) & 0x10) >> 1)); } static inline u8 array_index_to_page_addr(int index) { return ((((index) + PAGE_START) & 0x7) + ((((index) & 0x8) << 1) + PAGE_START)); } #define PHY_IO_TIMEOUT_USEC (50000) #define PHY_IO_DELAY_US (100) static inline int utmi_wait_register(void __iomem *reg, u32 mask, u32 result) { int ret; unsigned int val; ret = read_poll_timeout(readl, val, ((val & mask) == result), PHY_IO_DELAY_US, PHY_IO_TIMEOUT_USEC, false, reg); if (ret) { pr_err("%s can't program USB phy\n", __func__); return -ETIMEDOUT; } return 0; } static char rtk_phy_read(struct phy_reg *phy_reg, char addr) { void __iomem *reg_gusb2phyacc0 = phy_reg->reg_gusb2phyacc0; unsigned int val; int ret = 0; addr -= OFFEST_PHY_READ; /* polling until VBusy == 0 */ ret = utmi_wait_register(reg_gusb2phyacc0, PHY_VSTS_BUSY, 0); if (ret) return (char)ret; /* VCtrl = low nibble of addr, and set PHY_NEW_REG_REQ */ val = PHY_NEW_REG_REQ | (GET_LOW_NIBBLE(addr) << PHY_VCTRL_SHIFT); writel(val, reg_gusb2phyacc0); ret = utmi_wait_register(reg_gusb2phyacc0, PHY_VSTS_BUSY, 0); if (ret) return (char)ret; /* VCtrl = high nibble of addr, and set PHY_NEW_REG_REQ */ val = PHY_NEW_REG_REQ | (GET_HIGH_NIBBLE(addr) << PHY_VCTRL_SHIFT); writel(val, reg_gusb2phyacc0); ret = utmi_wait_register(reg_gusb2phyacc0, PHY_VSTS_BUSY, 0); if (ret) return (char)ret; val = readl(reg_gusb2phyacc0); return (char)(val & PHY_REG_DATA_MASK); } static int rtk_phy_write(struct phy_reg *phy_reg, char addr, char data) { unsigned int val; void __iomem *reg_wrap_vstatus = phy_reg->reg_wrap_vstatus; void __iomem *reg_gusb2phyacc0 = phy_reg->reg_gusb2phyacc0; int shift_bits = phy_reg->vstatus_index * 8; int ret = 0; /* write data to VStatusOut2 (data output to phy) */ writel((u32)data << shift_bits, reg_wrap_vstatus); ret = utmi_wait_register(reg_gusb2phyacc0, PHY_VSTS_BUSY, 0); if (ret) return ret; /* VCtrl = low nibble of addr, set PHY_NEW_REG_REQ */ val = PHY_NEW_REG_REQ | (GET_LOW_NIBBLE(addr) << PHY_VCTRL_SHIFT); writel(val, reg_gusb2phyacc0); ret = utmi_wait_register(reg_gusb2phyacc0, PHY_VSTS_BUSY, 0); if (ret) return ret; /* VCtrl = high nibble of addr, set PHY_NEW_REG_REQ */ val = PHY_NEW_REG_REQ | (GET_HIGH_NIBBLE(addr) << PHY_VCTRL_SHIFT); writel(val, reg_gusb2phyacc0); ret = utmi_wait_register(reg_gusb2phyacc0, PHY_VSTS_BUSY, 0); if (ret) return ret; return 0; } static int rtk_phy_set_page(struct phy_reg *phy_reg, int page) { switch (page) { case 0: return rtk_phy_write(phy_reg, SET_PAGE_OFFSET, SET_PAGE_0); case 1: return rtk_phy_write(phy_reg, SET_PAGE_OFFSET, SET_PAGE_1); case 2: return rtk_phy_write(phy_reg, SET_PAGE_OFFSET, SET_PAGE_2); default: pr_err("%s error page=%d\n", __func__, page); } return -EINVAL; } static u8 __updated_dc_disconnect_level_page0_0xe4(struct phy_cfg *phy_cfg, struct phy_parameter *phy_parameter, u8 data) { u8 ret; s32 val; s32 dc_disconnect_mask = phy_cfg->dc_disconnect_mask; int offset = 4; val = (s32)((data >> offset) & dc_disconnect_mask) + phy_parameter->efuse_usb_dc_dis + phy_parameter->disconnection_compensate; if (val > dc_disconnect_mask) val = dc_disconnect_mask; else if (val < 0) val = 0; ret = (data & (~(dc_disconnect_mask << offset))) | (val & dc_disconnect_mask) << offset; return ret; } /* updated disconnect level at page0 */ static void update_dc_disconnect_level_at_page0(struct rtk_phy *rtk_phy, struct phy_parameter *phy_parameter, bool update) { struct phy_cfg *phy_cfg; struct phy_reg *phy_reg; struct phy_data *phy_data_page; struct phy_data *phy_data; u8 addr, data; int offset = 4; s32 dc_disconnect_mask; int i; phy_cfg = rtk_phy->phy_cfg; phy_reg = &phy_parameter->phy_reg; /* Set page 0 */ phy_data_page = phy_cfg->page0; rtk_phy_set_page(phy_reg, 0); i = page_addr_to_array_index(PAGE0_0XE4); phy_data = phy_data_page + i; if (!phy_data->addr) { phy_data->addr = PAGE0_0XE4; phy_data->data = rtk_phy_read(phy_reg, PAGE0_0XE4); } addr = phy_data->addr; data = phy_data->data; dc_disconnect_mask = phy_cfg->dc_disconnect_mask; if (update) data = __updated_dc_disconnect_level_page0_0xe4(phy_cfg, phy_parameter, data); else data = (data & ~(dc_disconnect_mask << offset)) | (DEFAULT_DC_DISCONNECTION_VALUE << offset); if (rtk_phy_write(phy_reg, addr, data)) dev_err(rtk_phy->dev, "%s: Error to set page1 parameter addr=0x%x value=0x%x\n", __func__, addr, data); } static u8 __updated_dc_disconnect_level_page1_0xe2(struct phy_cfg *phy_cfg, struct phy_parameter *phy_parameter, u8 data) { u8 ret; s32 val; s32 dc_disconnect_mask = phy_cfg->dc_disconnect_mask; if (phy_cfg->check_efuse_version == CHECK_EFUSE_V1) { val = (s32)(data & dc_disconnect_mask) + phy_parameter->efuse_usb_dc_dis + phy_parameter->disconnection_compensate; } else { /* for CHECK_EFUSE_V2 or no efuse */ if (phy_parameter->efuse_usb_dc_dis) val = (s32)(phy_parameter->efuse_usb_dc_dis + phy_parameter->disconnection_compensate); else val = (s32)((data & dc_disconnect_mask) + phy_parameter->disconnection_compensate); } if (val > dc_disconnect_mask) val = dc_disconnect_mask; else if (val < 0) val = 0; ret = (data & (~dc_disconnect_mask)) | (val & dc_disconnect_mask); return ret; } /* updated disconnect level at page1 */ static void update_dc_disconnect_level_at_page1(struct rtk_phy *rtk_phy, struct phy_parameter *phy_parameter, bool update) { struct phy_cfg *phy_cfg; struct phy_data *phy_data_page; struct phy_data *phy_data; struct phy_reg *phy_reg; u8 addr, data; s32 dc_disconnect_mask; int i; phy_cfg = rtk_phy->phy_cfg; phy_reg = &phy_parameter->phy_reg; /* Set page 1 */ phy_data_page = phy_cfg->page1; rtk_phy_set_page(phy_reg, 1); i = page_addr_to_array_index(PAGE1_0XE2); phy_data = phy_data_page + i; if (!phy_data->addr) { phy_data->addr = PAGE1_0XE2; phy_data->data = rtk_phy_read(phy_reg, PAGE1_0XE2); } addr = phy_data->addr; data = phy_data->data; dc_disconnect_mask = phy_cfg->dc_disconnect_mask; if (update) data = __updated_dc_disconnect_level_page1_0xe2(phy_cfg, phy_parameter, data); else data = (data & ~dc_disconnect_mask) | DEFAULT_DC_DISCONNECTION_VALUE; if (rtk_phy_write(phy_reg, addr, data)) dev_err(rtk_phy->dev, "%s: Error to set page1 parameter addr=0x%x value=0x%x\n", __func__, addr, data); } static void update_dc_disconnect_level(struct rtk_phy *rtk_phy, struct phy_parameter *phy_parameter, bool update) { struct phy_cfg *phy_cfg = rtk_phy->phy_cfg; if (phy_cfg->usb_dc_disconnect_at_page0) update_dc_disconnect_level_at_page0(rtk_phy, phy_parameter, update); else update_dc_disconnect_level_at_page1(rtk_phy, phy_parameter, update); } static u8 __update_dc_driving_page0_0xe4(struct phy_cfg *phy_cfg, struct phy_parameter *phy_parameter, u8 data) { s32 driving_level_compensate = phy_parameter->driving_level_compensate; s32 dc_driving_mask = phy_cfg->dc_driving_mask; s32 val; u8 ret; if (phy_cfg->check_efuse_version == CHECK_EFUSE_V1) { val = (s32)(data & dc_driving_mask) + driving_level_compensate + phy_parameter->efuse_usb_dc_cal; } else { /* for CHECK_EFUSE_V2 or no efuse */ if (phy_parameter->efuse_usb_dc_cal) val = (s32)((phy_parameter->efuse_usb_dc_cal & dc_driving_mask) + driving_level_compensate); else val = (s32)(data & dc_driving_mask); } if (val > dc_driving_mask) val = dc_driving_mask; else if (val < 0) val = 0; ret = (data & (~dc_driving_mask)) | (val & dc_driving_mask); return ret; } static void update_dc_driving_level(struct rtk_phy *rtk_phy, struct phy_parameter *phy_parameter) { struct phy_cfg *phy_cfg; struct phy_reg *phy_reg; phy_reg = &phy_parameter->phy_reg; phy_cfg = rtk_phy->phy_cfg; if (!phy_cfg->page0[4].addr) { rtk_phy_set_page(phy_reg, 0); phy_cfg->page0[4].addr = PAGE0_0XE4; phy_cfg->page0[4].data = rtk_phy_read(phy_reg, PAGE0_0XE4); } if (phy_parameter->driving_level != DEFAULT_DC_DRIVING_VALUE) { u32 dc_driving_mask; u8 driving_level; u8 data; data = phy_cfg->page0[4].data; dc_driving_mask = phy_cfg->dc_driving_mask; driving_level = data & dc_driving_mask; dev_dbg(rtk_phy->dev, "%s driving_level=%d => dts driving_level=%d\n", __func__, driving_level, phy_parameter->driving_level); phy_cfg->page0[4].data = (data & (~dc_driving_mask)) | (phy_parameter->driving_level & dc_driving_mask); } phy_cfg->page0[4].data = __update_dc_driving_page0_0xe4(phy_cfg, phy_parameter, phy_cfg->page0[4].data); } static void update_hs_clk_select(struct rtk_phy *rtk_phy, struct phy_parameter *phy_parameter) { struct phy_cfg *phy_cfg; struct phy_reg *phy_reg; phy_cfg = rtk_phy->phy_cfg; phy_reg = &phy_parameter->phy_reg; if (phy_parameter->inverse_hstx_sync_clock) { if (!phy_cfg->page0[6].addr) { rtk_phy_set_page(phy_reg, 0); phy_cfg->page0[6].addr = PAGE0_0XE6; phy_cfg->page0[6].data = rtk_phy_read(phy_reg, PAGE0_0XE6); } phy_cfg->page0[6].data = phy_cfg->page0[6].data | HS_CLK_SELECT; } } static void do_rtk_phy_toggle(struct rtk_phy *rtk_phy, int index, bool connect) { struct phy_parameter *phy_parameter; struct phy_cfg *phy_cfg; struct phy_reg *phy_reg; struct phy_data *phy_data_page; u8 addr, data; int i; phy_cfg = rtk_phy->phy_cfg; phy_parameter = &((struct phy_parameter *)rtk_phy->phy_parameter)[index]; phy_reg = &phy_parameter->phy_reg; if (!phy_cfg->do_toggle) goto out; if (phy_cfg->is_double_sensitivity_mode) goto do_toggle_driving; /* Set page 0 */ rtk_phy_set_page(phy_reg, 0); addr = PAGE0_0XE7; data = rtk_phy_read(phy_reg, addr); if (connect) rtk_phy_write(phy_reg, addr, data & (~SENSITIVITY_CTRL)); else rtk_phy_write(phy_reg, addr, data | (SENSITIVITY_CTRL)); do_toggle_driving: if (!phy_cfg->do_toggle_driving) goto do_toggle; /* Page 0 addr 0xE4 driving capability */ /* Set page 0 */ phy_data_page = phy_cfg->page0; rtk_phy_set_page(phy_reg, 0); i = page_addr_to_array_index(PAGE0_0XE4); addr = phy_data_page[i].addr; data = phy_data_page[i].data; if (connect) { rtk_phy_write(phy_reg, addr, data); } else { u8 value; s32 tmp; s32 driving_updated = phy_cfg->driving_updated_for_dev_dis; s32 dc_driving_mask = phy_cfg->dc_driving_mask; tmp = (s32)(data & dc_driving_mask) + driving_updated; if (tmp > dc_driving_mask) tmp = dc_driving_mask; else if (tmp < 0) tmp = 0; value = (data & (~dc_driving_mask)) | (tmp & dc_driving_mask); rtk_phy_write(phy_reg, addr, value); } do_toggle: /* restore dc disconnect level before toggle */ update_dc_disconnect_level(rtk_phy, phy_parameter, false); /* Set page 1 */ rtk_phy_set_page(phy_reg, 1); addr = PAGE1_0XE0; data = rtk_phy_read(phy_reg, addr); rtk_phy_write(phy_reg, addr, data & (~ENABLE_AUTO_SENSITIVITY_CALIBRATION)); mdelay(1); rtk_phy_write(phy_reg, addr, data | (ENABLE_AUTO_SENSITIVITY_CALIBRATION)); /* update dc disconnect level after toggle */ update_dc_disconnect_level(rtk_phy, phy_parameter, true); out: return; } static int do_rtk_phy_init(struct rtk_phy *rtk_phy, int index) { struct phy_parameter *phy_parameter; struct phy_cfg *phy_cfg; struct phy_data *phy_data_page; struct phy_reg *phy_reg; int i; phy_cfg = rtk_phy->phy_cfg; phy_parameter = &((struct phy_parameter *)rtk_phy->phy_parameter)[index]; phy_reg = &phy_parameter->phy_reg; if (phy_cfg->use_default_parameter) { dev_dbg(rtk_phy->dev, "%s phy#%d use default parameter\n", __func__, index); goto do_toggle; } /* Set page 0 */ phy_data_page = phy_cfg->page0; rtk_phy_set_page(phy_reg, 0); for (i = 0; i < phy_cfg->page0_size; i++) { struct phy_data *phy_data = phy_data_page + i; u8 addr = phy_data->addr; u8 data = phy_data->data; if (!addr) continue; if (rtk_phy_write(phy_reg, addr, data)) { dev_err(rtk_phy->dev, "%s: Error to set page0 parameter addr=0x%x value=0x%x\n", __func__, addr, data); return -EINVAL; } } /* Set page 1 */ phy_data_page = phy_cfg->page1; rtk_phy_set_page(phy_reg, 1); for (i = 0; i < phy_cfg->page1_size; i++) { struct phy_data *phy_data = phy_data_page + i; u8 addr = phy_data->addr; u8 data = phy_data->data; if (!addr) continue; if (rtk_phy_write(phy_reg, addr, data)) { dev_err(rtk_phy->dev, "%s: Error to set page1 parameter addr=0x%x value=0x%x\n", __func__, addr, data); return -EINVAL; } } if (phy_cfg->page2_size == 0) goto do_toggle; /* Set page 2 */ phy_data_page = phy_cfg->page2; rtk_phy_set_page(phy_reg, 2); for (i = 0; i < phy_cfg->page2_size; i++) { struct phy_data *phy_data = phy_data_page + i; u8 addr = phy_data->addr; u8 data = phy_data->data; if (!addr) continue; if (rtk_phy_write(phy_reg, addr, data)) { dev_err(rtk_phy->dev, "%s: Error to set page2 parameter addr=0x%x value=0x%x\n", __func__, addr, data); return -EINVAL; } } do_toggle: do_rtk_phy_toggle(rtk_phy, index, false); return 0; } static int rtk_phy_init(struct phy *phy) { struct rtk_phy *rtk_phy = phy_get_drvdata(phy); unsigned long phy_init_time = jiffies; int i, ret = 0; if (!rtk_phy) return -EINVAL; for (i = 0; i < rtk_phy->num_phy; i++) ret = do_rtk_phy_init(rtk_phy, i); dev_dbg(rtk_phy->dev, "Initialized RTK USB 2.0 PHY (take %dms)\n", jiffies_to_msecs(jiffies - phy_init_time)); return ret; } static int rtk_phy_exit(struct phy *phy) { return 0; } static void rtk_phy_toggle(struct rtk_phy *rtk_phy, bool connect, int port) { int index = port; if (index > rtk_phy->num_phy) { dev_err(rtk_phy->dev, "%s: The port=%d is not in usb phy (num_phy=%d)\n", __func__, index, rtk_phy->num_phy); return; } do_rtk_phy_toggle(rtk_phy, index, connect); } static int rtk_phy_connect(struct phy *phy, int port) { struct rtk_phy *rtk_phy = phy_get_drvdata(phy); dev_dbg(rtk_phy->dev, "%s port=%d\n", __func__, port); rtk_phy_toggle(rtk_phy, true, port); return 0; } static int rtk_phy_disconnect(struct phy *phy, int port) { struct rtk_phy *rtk_phy = phy_get_drvdata(phy); dev_dbg(rtk_phy->dev, "%s port=%d\n", __func__, port); rtk_phy_toggle(rtk_phy, false, port); return 0; } static const struct phy_ops ops = { .init = rtk_phy_init, .exit = rtk_phy_exit, .connect = rtk_phy_connect, .disconnect = rtk_phy_disconnect, .owner = THIS_MODULE, }; #ifdef CONFIG_DEBUG_FS static struct dentry *create_phy_debug_root(void) { struct dentry *phy_debug_root; phy_debug_root = debugfs_lookup("phy", usb_debug_root); if (!phy_debug_root) phy_debug_root = debugfs_create_dir("phy", usb_debug_root); return phy_debug_root; } static int rtk_usb2_parameter_show(struct seq_file *s, void *unused) { struct rtk_phy *rtk_phy = s->private; struct phy_cfg *phy_cfg; int i, index; phy_cfg = rtk_phy->phy_cfg; seq_puts(s, "Property:\n"); seq_printf(s, " check_efuse: %s\n", phy_cfg->check_efuse ? "Enable" : "Disable"); seq_printf(s, " check_efuse_version: %d\n", phy_cfg->check_efuse_version); seq_printf(s, " efuse_dc_driving_rate: %d\n", phy_cfg->efuse_dc_driving_rate); seq_printf(s, " dc_driving_mask: 0x%x\n", phy_cfg->dc_driving_mask); seq_printf(s, " efuse_dc_disconnect_rate: %d\n", phy_cfg->efuse_dc_disconnect_rate); seq_printf(s, " dc_disconnect_mask: 0x%x\n", phy_cfg->dc_disconnect_mask); seq_printf(s, " usb_dc_disconnect_at_page0: %s\n", phy_cfg->usb_dc_disconnect_at_page0 ? "true" : "false"); seq_printf(s, " do_toggle: %s\n", phy_cfg->do_toggle ? "Enable" : "Disable"); seq_printf(s, " do_toggle_driving: %s\n", phy_cfg->do_toggle_driving ? "Enable" : "Disable"); seq_printf(s, " driving_updated_for_dev_dis: 0x%x\n", phy_cfg->driving_updated_for_dev_dis); seq_printf(s, " use_default_parameter: %s\n", phy_cfg->use_default_parameter ? "Enable" : "Disable"); seq_printf(s, " is_double_sensitivity_mode: %s\n", phy_cfg->is_double_sensitivity_mode ? "Enable" : "Disable"); for (index = 0; index < rtk_phy->num_phy; index++) { struct phy_parameter *phy_parameter; struct phy_reg *phy_reg; struct phy_data *phy_data_page; phy_parameter = &((struct phy_parameter *)rtk_phy->phy_parameter)[index]; phy_reg = &phy_parameter->phy_reg; seq_printf(s, "PHY %d:\n", index); seq_puts(s, "Page 0:\n"); /* Set page 0 */ phy_data_page = phy_cfg->page0; rtk_phy_set_page(phy_reg, 0); for (i = 0; i < phy_cfg->page0_size; i++) { struct phy_data *phy_data = phy_data_page + i; u8 addr = array_index_to_page_addr(i); u8 data = phy_data->data; u8 value = rtk_phy_read(phy_reg, addr); if (phy_data->addr) seq_printf(s, " Page 0: addr=0x%x data=0x%02x ==> read value=0x%02x\n", addr, data, value); else seq_printf(s, " Page 0: addr=0x%x data=none ==> read value=0x%02x\n", addr, value); } seq_puts(s, "Page 1:\n"); /* Set page 1 */ phy_data_page = phy_cfg->page1; rtk_phy_set_page(phy_reg, 1); for (i = 0; i < phy_cfg->page1_size; i++) { struct phy_data *phy_data = phy_data_page + i; u8 addr = array_index_to_page_addr(i); u8 data = phy_data->data; u8 value = rtk_phy_read(phy_reg, addr); if (phy_data->addr) seq_printf(s, " Page 1: addr=0x%x data=0x%02x ==> read value=0x%02x\n", addr, data, value); else seq_printf(s, " Page 1: addr=0x%x data=none ==> read value=0x%02x\n", addr, value); } if (phy_cfg->page2_size == 0) goto out; seq_puts(s, "Page 2:\n"); /* Set page 2 */ phy_data_page = phy_cfg->page2; rtk_phy_set_page(phy_reg, 2); for (i = 0; i < phy_cfg->page2_size; i++) { struct phy_data *phy_data = phy_data_page + i; u8 addr = array_index_to_page_addr(i); u8 data = phy_data->data; u8 value = rtk_phy_read(phy_reg, addr); if (phy_data->addr) seq_printf(s, " Page 2: addr=0x%x data=0x%02x ==> read value=0x%02x\n", addr, data, value); else seq_printf(s, " Page 2: addr=0x%x data=none ==> read value=0x%02x\n", addr, value); } out: seq_puts(s, "PHY Property:\n"); seq_printf(s, " efuse_usb_dc_cal: %d\n", (int)phy_parameter->efuse_usb_dc_cal); seq_printf(s, " efuse_usb_dc_dis: %d\n", (int)phy_parameter->efuse_usb_dc_dis); seq_printf(s, " inverse_hstx_sync_clock: %s\n", phy_parameter->inverse_hstx_sync_clock ? "Enable" : "Disable"); seq_printf(s, " driving_level: %d\n", phy_parameter->driving_level); seq_printf(s, " driving_level_compensate: %d\n", phy_parameter->driving_level_compensate); seq_printf(s, " disconnection_compensate: %d\n", phy_parameter->disconnection_compensate); } return 0; } DEFINE_SHOW_ATTRIBUTE(rtk_usb2_parameter); static inline void create_debug_files(struct rtk_phy *rtk_phy) { struct dentry *phy_debug_root = NULL; phy_debug_root = create_phy_debug_root(); if (!phy_debug_root) return; rtk_phy->debug_dir = debugfs_create_dir(dev_name(rtk_phy->dev), phy_debug_root); debugfs_create_file("parameter", 0444, rtk_phy->debug_dir, rtk_phy, &rtk_usb2_parameter_fops); } static inline void remove_debug_files(struct rtk_phy *rtk_phy) { debugfs_remove_recursive(rtk_phy->debug_dir); } #else static inline void create_debug_files(struct rtk_phy *rtk_phy) { } static inline void remove_debug_files(struct rtk_phy *rtk_phy) { } #endif /* CONFIG_DEBUG_FS */ static int get_phy_data_by_efuse(struct rtk_phy *rtk_phy, struct phy_parameter *phy_parameter, int index) { struct phy_cfg *phy_cfg = rtk_phy->phy_cfg; u8 value = 0; struct nvmem_cell *cell; struct soc_device_attribute rtk_soc_groot[] = { { .family = "Realtek Groot",}, { /* empty */ } }; if (!phy_cfg->check_efuse) goto out; /* Read efuse for usb dc cal */ cell = nvmem_cell_get(rtk_phy->dev, "usb-dc-cal"); if (IS_ERR(cell)) { dev_dbg(rtk_phy->dev, "%s no usb-dc-cal: %ld\n", __func__, PTR_ERR(cell)); } else { unsigned char *buf; size_t buf_size; buf = nvmem_cell_read(cell, &buf_size); if (!IS_ERR(buf)) { value = buf[0] & phy_cfg->dc_driving_mask; kfree(buf); } nvmem_cell_put(cell); } if (phy_cfg->check_efuse_version == CHECK_EFUSE_V1) { int rate = phy_cfg->efuse_dc_driving_rate; if (value <= EFUS_USB_DC_CAL_MAX) phy_parameter->efuse_usb_dc_cal = (int8_t)(value * rate); else phy_parameter->efuse_usb_dc_cal = -(int8_t) ((EFUS_USB_DC_CAL_MAX & value) * rate); if (soc_device_match(rtk_soc_groot)) { dev_dbg(rtk_phy->dev, "For groot IC we need a workaround to adjust efuse_usb_dc_cal\n"); /* We don't multiple dc_cal_rate=2 for positive dc cal compensate */ if (value <= EFUS_USB_DC_CAL_MAX) phy_parameter->efuse_usb_dc_cal = (int8_t)(value); /* We set max dc cal compensate is 0x8 if otp is 0x7 */ if (value == 0x7) phy_parameter->efuse_usb_dc_cal = (int8_t)(value + 1); } } else { /* for CHECK_EFUSE_V2 */ phy_parameter->efuse_usb_dc_cal = value & phy_cfg->dc_driving_mask; } /* Read efuse for usb dc disconnect level */ value = 0; cell = nvmem_cell_get(rtk_phy->dev, "usb-dc-dis"); if (IS_ERR(cell)) { dev_dbg(rtk_phy->dev, "%s no usb-dc-dis: %ld\n", __func__, PTR_ERR(cell)); } else { unsigned char *buf; size_t buf_size; buf = nvmem_cell_read(cell, &buf_size); if (!IS_ERR(buf)) { value = buf[0] & phy_cfg->dc_disconnect_mask; kfree(buf); } nvmem_cell_put(cell); } if (phy_cfg->check_efuse_version == CHECK_EFUSE_V1) { int rate = phy_cfg->efuse_dc_disconnect_rate; if (value <= EFUS_USB_DC_DIS_MAX) phy_parameter->efuse_usb_dc_dis = (int8_t)(value * rate); else phy_parameter->efuse_usb_dc_dis = -(int8_t) ((EFUS_USB_DC_DIS_MAX & value) * rate); } else { /* for CHECK_EFUSE_V2 */ phy_parameter->efuse_usb_dc_dis = value & phy_cfg->dc_disconnect_mask; } out: return 0; } static int parse_phy_data(struct rtk_phy *rtk_phy) { struct device *dev = rtk_phy->dev; struct device_node *np = dev->of_node; struct phy_parameter *phy_parameter; int ret = 0; int index; rtk_phy->phy_parameter = devm_kzalloc(dev, sizeof(struct phy_parameter) * rtk_phy->num_phy, GFP_KERNEL); if (!rtk_phy->phy_parameter) return -ENOMEM; for (index = 0; index < rtk_phy->num_phy; index++) { phy_parameter = &((struct phy_parameter *)rtk_phy->phy_parameter)[index]; phy_parameter->phy_reg.reg_wrap_vstatus = of_iomap(np, 0); phy_parameter->phy_reg.reg_gusb2phyacc0 = of_iomap(np, 1) + index; phy_parameter->phy_reg.vstatus_index = index; if (of_property_read_bool(np, "realtek,inverse-hstx-sync-clock")) phy_parameter->inverse_hstx_sync_clock = true; else phy_parameter->inverse_hstx_sync_clock = false; if (of_property_read_u32_index(np, "realtek,driving-level", index, &phy_parameter->driving_level)) phy_parameter->driving_level = DEFAULT_DC_DRIVING_VALUE; if (of_property_read_u32_index(np, "realtek,driving-level-compensate", index, &phy_parameter->driving_level_compensate)) phy_parameter->driving_level_compensate = 0; if (of_property_read_u32_index(np, "realtek,disconnection-compensate", index, &phy_parameter->disconnection_compensate)) phy_parameter->disconnection_compensate = 0; get_phy_data_by_efuse(rtk_phy, phy_parameter, index); update_dc_driving_level(rtk_phy, phy_parameter); update_hs_clk_select(rtk_phy, phy_parameter); } return ret; } static int rtk_usb2phy_probe(struct platform_device *pdev) { struct rtk_phy *rtk_phy; struct device *dev = &pdev->dev; struct phy *generic_phy; struct phy_provider *phy_provider; const struct phy_cfg *phy_cfg; int ret = 0; phy_cfg = of_device_get_match_data(dev); if (!phy_cfg) { dev_err(dev, "phy config are not assigned!\n"); return -EINVAL; } rtk_phy = devm_kzalloc(dev, sizeof(*rtk_phy), GFP_KERNEL); if (!rtk_phy) return -ENOMEM; rtk_phy->dev = &pdev->dev; rtk_phy->phy_cfg = devm_kzalloc(dev, sizeof(*phy_cfg), GFP_KERNEL); if (!rtk_phy->phy_cfg) return -ENOMEM; memcpy(rtk_phy->phy_cfg, phy_cfg, sizeof(*phy_cfg)); rtk_phy->num_phy = phy_cfg->num_phy; ret = parse_phy_data(rtk_phy); if (ret) goto err; platform_set_drvdata(pdev, rtk_phy); generic_phy = devm_phy_create(rtk_phy->dev, NULL, &ops); if (IS_ERR(generic_phy)) return PTR_ERR(generic_phy); phy_set_drvdata(generic_phy, rtk_phy); phy_provider = devm_of_phy_provider_register(rtk_phy->dev, of_phy_simple_xlate); if (IS_ERR(phy_provider)) return PTR_ERR(phy_provider); create_debug_files(rtk_phy); err: return ret; } static void rtk_usb2phy_remove(struct platform_device *pdev) { struct rtk_phy *rtk_phy = platform_get_drvdata(pdev); remove_debug_files(rtk_phy); } static const struct phy_cfg rtd1295_phy_cfg = { .page0_size = MAX_USB_PHY_PAGE0_DATA_SIZE, .page0 = { [0] = {0xe0, 0x90}, [3] = {0xe3, 0x3a}, [4] = {0xe4, 0x68}, [6] = {0xe6, 0x91}, [13] = {0xf5, 0x81}, [15] = {0xf7, 0x02}, }, .page1_size = 8, .page1 = { /* default parameter */ }, .page2_size = 0, .page2 = { /* no parameter */ }, .num_phy = 1, .check_efuse = false, .check_efuse_version = CHECK_EFUSE_V1, .efuse_dc_driving_rate = 1, .dc_driving_mask = 0xf, .efuse_dc_disconnect_rate = EFUS_USB_DC_DIS_RATE, .dc_disconnect_mask = 0xf, .usb_dc_disconnect_at_page0 = true, .do_toggle = true, .do_toggle_driving = false, .driving_updated_for_dev_dis = 0xf, .use_default_parameter = false, .is_double_sensitivity_mode = false, }; static const struct phy_cfg rtd1395_phy_cfg = { .page0_size = MAX_USB_PHY_PAGE0_DATA_SIZE, .page0 = { [4] = {0xe4, 0xac}, [13] = {0xf5, 0x00}, [15] = {0xf7, 0x02}, }, .page1_size = 8, .page1 = { /* default parameter */ }, .page2_size = 0, .page2 = { /* no parameter */ }, .num_phy = 1, .check_efuse = false, .check_efuse_version = CHECK_EFUSE_V1, .efuse_dc_driving_rate = 1, .dc_driving_mask = 0xf, .efuse_dc_disconnect_rate = EFUS_USB_DC_DIS_RATE, .dc_disconnect_mask = 0xf, .usb_dc_disconnect_at_page0 = true, .do_toggle = true, .do_toggle_driving = false, .driving_updated_for_dev_dis = 0xf, .use_default_parameter = false, .is_double_sensitivity_mode = false, }; static const struct phy_cfg rtd1395_phy_cfg_2port = { .page0_size = MAX_USB_PHY_PAGE0_DATA_SIZE, .page0 = { [4] = {0xe4, 0xac}, [13] = {0xf5, 0x00}, [15] = {0xf7, 0x02}, }, .page1_size = 8, .page1 = { /* default parameter */ }, .page2_size = 0, .page2 = { /* no parameter */ }, .num_phy = 2, .check_efuse = false, .check_efuse_version = CHECK_EFUSE_V1, .efuse_dc_driving_rate = 1, .dc_driving_mask = 0xf, .efuse_dc_disconnect_rate = EFUS_USB_DC_DIS_RATE, .dc_disconnect_mask = 0xf, .usb_dc_disconnect_at_page0 = true, .do_toggle = true, .do_toggle_driving = false, .driving_updated_for_dev_dis = 0xf, .use_default_parameter = false, .is_double_sensitivity_mode = false, }; static const struct phy_cfg rtd1619_phy_cfg = { .page0_size = MAX_USB_PHY_PAGE0_DATA_SIZE, .page0 = { [4] = {0xe4, 0x68}, }, .page1_size = 8, .page1 = { /* default parameter */ }, .page2_size = 0, .page2 = { /* no parameter */ }, .num_phy = 1, .check_efuse = true, .check_efuse_version = CHECK_EFUSE_V1, .efuse_dc_driving_rate = 1, .dc_driving_mask = 0xf, .efuse_dc_disconnect_rate = EFUS_USB_DC_DIS_RATE, .dc_disconnect_mask = 0xf, .usb_dc_disconnect_at_page0 = true, .do_toggle = true, .do_toggle_driving = false, .driving_updated_for_dev_dis = 0xf, .use_default_parameter = false, .is_double_sensitivity_mode = false, }; static const struct phy_cfg rtd1319_phy_cfg = { .page0_size = MAX_USB_PHY_PAGE0_DATA_SIZE, .page0 = { [0] = {0xe0, 0x18}, [4] = {0xe4, 0x6a}, [7] = {0xe7, 0x71}, [13] = {0xf5, 0x15}, [15] = {0xf7, 0x32}, }, .page1_size = 8, .page1 = { [3] = {0xe3, 0x44}, }, .page2_size = MAX_USB_PHY_PAGE2_DATA_SIZE, .page2 = { [0] = {0xe0, 0x01}, }, .num_phy = 1, .check_efuse = true, .check_efuse_version = CHECK_EFUSE_V1, .efuse_dc_driving_rate = 1, .dc_driving_mask = 0xf, .efuse_dc_disconnect_rate = EFUS_USB_DC_DIS_RATE, .dc_disconnect_mask = 0xf, .usb_dc_disconnect_at_page0 = true, .do_toggle = true, .do_toggle_driving = true, .driving_updated_for_dev_dis = 0xf, .use_default_parameter = false, .is_double_sensitivity_mode = true, }; static const struct phy_cfg rtd1312c_phy_cfg = { .page0_size = MAX_USB_PHY_PAGE0_DATA_SIZE, .page0 = { [0] = {0xe0, 0x14}, [4] = {0xe4, 0x67}, [5] = {0xe5, 0x55}, }, .page1_size = 8, .page1 = { [3] = {0xe3, 0x23}, [6] = {0xe6, 0x58}, }, .page2_size = MAX_USB_PHY_PAGE2_DATA_SIZE, .page2 = { /* default parameter */ }, .num_phy = 1, .check_efuse = true, .check_efuse_version = CHECK_EFUSE_V1, .efuse_dc_driving_rate = 1, .dc_driving_mask = 0xf, .efuse_dc_disconnect_rate = EFUS_USB_DC_DIS_RATE, .dc_disconnect_mask = 0xf, .usb_dc_disconnect_at_page0 = true, .do_toggle = true, .do_toggle_driving = true, .driving_updated_for_dev_dis = 0xf, .use_default_parameter = false, .is_double_sensitivity_mode = true, }; static const struct phy_cfg rtd1619b_phy_cfg = { .page0_size = MAX_USB_PHY_PAGE0_DATA_SIZE, .page0 = { [0] = {0xe0, 0xa3}, [4] = {0xe4, 0xa8}, [5] = {0xe5, 0x4f}, [6] = {0xe6, 0x02}, }, .page1_size = 8, .page1 = { [3] = {0xe3, 0x64}, }, .page2_size = MAX_USB_PHY_PAGE2_DATA_SIZE, .page2 = { [7] = {0xe7, 0x45}, }, .num_phy = 1, .check_efuse = true, .check_efuse_version = CHECK_EFUSE_V1, .efuse_dc_driving_rate = EFUS_USB_DC_CAL_RATE, .dc_driving_mask = 0x1f, .efuse_dc_disconnect_rate = EFUS_USB_DC_DIS_RATE, .dc_disconnect_mask = 0xf, .usb_dc_disconnect_at_page0 = false, .do_toggle = true, .do_toggle_driving = true, .driving_updated_for_dev_dis = 0x8, .use_default_parameter = false, .is_double_sensitivity_mode = true, }; static const struct phy_cfg rtd1319d_phy_cfg = { .page0_size = MAX_USB_PHY_PAGE0_DATA_SIZE, .page0 = { [0] = {0xe0, 0xa3}, [4] = {0xe4, 0x8e}, [5] = {0xe5, 0x4f}, [6] = {0xe6, 0x02}, }, .page1_size = MAX_USB_PHY_PAGE1_DATA_SIZE, .page1 = { [14] = {0xf5, 0x1}, }, .page2_size = MAX_USB_PHY_PAGE2_DATA_SIZE, .page2 = { [7] = {0xe7, 0x44}, }, .check_efuse = true, .num_phy = 1, .check_efuse_version = CHECK_EFUSE_V1, .efuse_dc_driving_rate = EFUS_USB_DC_CAL_RATE, .dc_driving_mask = 0x1f, .efuse_dc_disconnect_rate = EFUS_USB_DC_DIS_RATE, .dc_disconnect_mask = 0xf, .usb_dc_disconnect_at_page0 = false, .do_toggle = true, .do_toggle_driving = false, .driving_updated_for_dev_dis = 0x8, .use_default_parameter = false, .is_double_sensitivity_mode = true, }; static const struct phy_cfg rtd1315e_phy_cfg = { .page0_size = MAX_USB_PHY_PAGE0_DATA_SIZE, .page0 = { [0] = {0xe0, 0xa3}, [4] = {0xe4, 0x8c}, [5] = {0xe5, 0x4f}, [6] = {0xe6, 0x02}, }, .page1_size = MAX_USB_PHY_PAGE1_DATA_SIZE, .page1 = { [3] = {0xe3, 0x7f}, [14] = {0xf5, 0x01}, }, .page2_size = MAX_USB_PHY_PAGE2_DATA_SIZE, .page2 = { [7] = {0xe7, 0x44}, }, .num_phy = 1, .check_efuse = true, .check_efuse_version = CHECK_EFUSE_V2, .efuse_dc_driving_rate = EFUS_USB_DC_CAL_RATE, .dc_driving_mask = 0x1f, .efuse_dc_disconnect_rate = EFUS_USB_DC_DIS_RATE, .dc_disconnect_mask = 0xf, .usb_dc_disconnect_at_page0 = false, .do_toggle = true, .do_toggle_driving = false, .driving_updated_for_dev_dis = 0x8, .use_default_parameter = false, .is_double_sensitivity_mode = true, }; static const struct of_device_id usbphy_rtk_dt_match[] = { { .compatible = "realtek,rtd1295-usb2phy", .data = &rtd1295_phy_cfg }, { .compatible = "realtek,rtd1312c-usb2phy", .data = &rtd1312c_phy_cfg }, { .compatible = "realtek,rtd1315e-usb2phy", .data = &rtd1315e_phy_cfg }, { .compatible = "realtek,rtd1319-usb2phy", .data = &rtd1319_phy_cfg }, { .compatible = "realtek,rtd1319d-usb2phy", .data = &rtd1319d_phy_cfg }, { .compatible = "realtek,rtd1395-usb2phy", .data = &rtd1395_phy_cfg }, { .compatible = "realtek,rtd1395-usb2phy-2port", .data = &rtd1395_phy_cfg_2port }, { .compatible = "realtek,rtd1619-usb2phy", .data = &rtd1619_phy_cfg }, { .compatible = "realtek,rtd1619b-usb2phy", .data = &rtd1619b_phy_cfg }, {}, }; MODULE_DEVICE_TABLE(of, usbphy_rtk_dt_match); static struct platform_driver rtk_usb2phy_driver = { .probe = rtk_usb2phy_probe, .remove = rtk_usb2phy_remove, .driver = { .name = "rtk-usb2phy", .of_match_table = usbphy_rtk_dt_match, }, }; module_platform_driver(rtk_usb2phy_driver); MODULE_LICENSE("GPL"); MODULE_AUTHOR("Stanley Chang "); MODULE_DESCRIPTION("Realtek usb 2.0 phy driver");