diff options
Diffstat (limited to 'drivers/phy/phy-rockchip-typec.c')
| -rw-r--r-- | drivers/phy/phy-rockchip-typec.c | 1023 |
1 files changed, 1023 insertions, 0 deletions
diff --git a/drivers/phy/phy-rockchip-typec.c b/drivers/phy/phy-rockchip-typec.c new file mode 100644 index 000000000000..7cfb0f8995de --- /dev/null +++ b/drivers/phy/phy-rockchip-typec.c @@ -0,0 +1,1023 @@ +/* + * Copyright (C) Fuzhou Rockchip Electronics Co.Ltd + * Author: Chris Zhong <zyw@rock-chips.com> + * Kever Yang <kever.yang@rock-chips.com> + * + * This software is licensed under the terms of the GNU General Public + * License version 2, as published by the Free Software Foundation, and + * may be copied, distributed, and modified under those terms. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * The ROCKCHIP Type-C PHY has two PLL clocks. The first PLL clock + * is used for USB3, the second PLL clock is used for DP. This Type-C PHY has + * 3 working modes: USB3 only mode, DP only mode, and USB3+DP mode. + * At USB3 only mode, both PLL clocks need to be initialized, this allows the + * PHY to switch mode between USB3 and USB3+DP, without disconnecting the USB + * device. + * In The DP only mode, only the DP PLL needs to be powered on, and the 4 lanes + * are all used for DP. + * + * This driver gets extcon cable state and property, then decides which mode to + * select: + * + * 1. USB3 only mode: + * EXTCON_USB or EXTCON_USB_HOST state is true, and + * EXTCON_PROP_USB_SS property is true. + * EXTCON_DISP_DP state is false. + * + * 2. DP only mode: + * EXTCON_DISP_DP state is true, and + * EXTCON_PROP_USB_SS property is false. + * If EXTCON_USB_HOST state is true, it is DP + USB2 mode, since the USB2 phy + * is a separate phy, so this case is still DP only mode. + * + * 3. USB3+DP mode: + * EXTCON_USB_HOST and EXTCON_DISP_DP are both true, and + * EXTCON_PROP_USB_SS property is true. + * + * This Type-C PHY driver supports normal and flip orientation. The orientation + * is reported by the EXTCON_PROP_USB_TYPEC_POLARITY property: true is flip + * orientation, false is normal orientation. + * + */ + +#include <linux/clk.h> +#include <linux/clk-provider.h> +#include <linux/delay.h> +#include <linux/extcon.h> +#include <linux/io.h> +#include <linux/iopoll.h> +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/mutex.h> +#include <linux/of.h> +#include <linux/of_address.h> +#include <linux/of_platform.h> +#include <linux/platform_device.h> +#include <linux/regmap.h> +#include <linux/reset.h> + +#include <linux/mfd/syscon.h> +#include <linux/phy/phy.h> + +#define CMN_SSM_BANDGAP (0x21 << 2) +#define CMN_SSM_BIAS (0x22 << 2) +#define CMN_PLLSM0_PLLEN (0x29 << 2) +#define CMN_PLLSM0_PLLPRE (0x2a << 2) +#define CMN_PLLSM0_PLLVREF (0x2b << 2) +#define CMN_PLLSM0_PLLLOCK (0x2c << 2) +#define CMN_PLLSM1_PLLEN (0x31 << 2) +#define CMN_PLLSM1_PLLPRE (0x32 << 2) +#define CMN_PLLSM1_PLLVREF (0x33 << 2) +#define CMN_PLLSM1_PLLLOCK (0x34 << 2) +#define CMN_PLLSM1_USER_DEF_CTRL (0x37 << 2) +#define CMN_ICAL_OVRD (0xc1 << 2) +#define CMN_PLL0_VCOCAL_OVRD (0x83 << 2) +#define CMN_PLL0_VCOCAL_INIT (0x84 << 2) +#define CMN_PLL0_VCOCAL_ITER (0x85 << 2) +#define CMN_PLL0_LOCK_REFCNT_START (0x90 << 2) +#define CMN_PLL0_LOCK_PLLCNT_START (0x92 << 2) +#define CMN_PLL0_LOCK_PLLCNT_THR (0x93 << 2) +#define CMN_PLL0_INTDIV (0x94 << 2) +#define CMN_PLL0_FRACDIV (0x95 << 2) +#define CMN_PLL0_HIGH_THR (0x96 << 2) +#define CMN_PLL0_DSM_DIAG (0x97 << 2) +#define CMN_PLL0_SS_CTRL1 (0x98 << 2) +#define CMN_PLL0_SS_CTRL2 (0x99 << 2) +#define CMN_PLL1_VCOCAL_START (0xa1 << 2) +#define CMN_PLL1_VCOCAL_OVRD (0xa3 << 2) +#define CMN_PLL1_VCOCAL_INIT (0xa4 << 2) +#define CMN_PLL1_VCOCAL_ITER (0xa5 << 2) +#define CMN_PLL1_LOCK_REFCNT_START (0xb0 << 2) +#define CMN_PLL1_LOCK_PLLCNT_START (0xb2 << 2) +#define CMN_PLL1_LOCK_PLLCNT_THR (0xb3 << 2) +#define CMN_PLL1_INTDIV (0xb4 << 2) +#define CMN_PLL1_FRACDIV (0xb5 << 2) +#define CMN_PLL1_HIGH_THR (0xb6 << 2) +#define CMN_PLL1_DSM_DIAG (0xb7 << 2) +#define CMN_PLL1_SS_CTRL1 (0xb8 << 2) +#define CMN_PLL1_SS_CTRL2 (0xb9 << 2) +#define CMN_RXCAL_OVRD (0xd1 << 2) +#define CMN_TXPUCAL_CTRL (0xe0 << 2) +#define CMN_TXPUCAL_OVRD (0xe1 << 2) +#define CMN_TXPDCAL_OVRD (0xf1 << 2) +#define CMN_DIAG_PLL0_FBH_OVRD (0x1c0 << 2) +#define CMN_DIAG_PLL0_FBL_OVRD (0x1c1 << 2) +#define CMN_DIAG_PLL0_OVRD (0x1c2 << 2) +#define CMN_DIAG_PLL0_V2I_TUNE (0x1c5 << 2) +#define CMN_DIAG_PLL0_CP_TUNE (0x1c6 << 2) +#define CMN_DIAG_PLL0_LF_PROG (0x1c7 << 2) +#define CMN_DIAG_PLL1_FBH_OVRD (0x1d0 << 2) +#define CMN_DIAG_PLL1_FBL_OVRD (0x1d1 << 2) +#define CMN_DIAG_PLL1_OVRD (0x1d2 << 2) +#define CMN_DIAG_PLL1_V2I_TUNE (0x1d5 << 2) +#define CMN_DIAG_PLL1_CP_TUNE (0x1d6 << 2) +#define CMN_DIAG_PLL1_LF_PROG (0x1d7 << 2) +#define CMN_DIAG_PLL1_PTATIS_TUNE1 (0x1d8 << 2) +#define CMN_DIAG_PLL1_PTATIS_TUNE2 (0x1d9 << 2) +#define CMN_DIAG_PLL1_INCLK_CTRL (0x1da << 2) +#define CMN_DIAG_HSCLK_SEL (0x1e0 << 2) + +#define XCVR_PSM_RCTRL(n) ((0x4001 | ((n) << 9)) << 2) +#define XCVR_PSM_CAL_TMR(n) ((0x4002 | ((n) << 9)) << 2) +#define XCVR_PSM_A0IN_TMR(n) ((0x4003 | ((n) << 9)) << 2) +#define TX_TXCC_CAL_SCLR_MULT(n) ((0x4047 | ((n) << 9)) << 2) +#define TX_TXCC_CPOST_MULT_00(n) ((0x404c | ((n) << 9)) << 2) +#define TX_TXCC_CPOST_MULT_01(n) ((0x404d | ((n) << 9)) << 2) +#define TX_TXCC_CPOST_MULT_10(n) ((0x404e | ((n) << 9)) << 2) +#define TX_TXCC_CPOST_MULT_11(n) ((0x404f | ((n) << 9)) << 2) +#define TX_TXCC_MGNFS_MULT_000(n) ((0x4050 | ((n) << 9)) << 2) +#define TX_TXCC_MGNFS_MULT_001(n) ((0x4051 | ((n) << 9)) << 2) +#define TX_TXCC_MGNFS_MULT_010(n) ((0x4052 | ((n) << 9)) << 2) +#define TX_TXCC_MGNFS_MULT_011(n) ((0x4053 | ((n) << 9)) << 2) +#define TX_TXCC_MGNFS_MULT_100(n) ((0x4054 | ((n) << 9)) << 2) +#define TX_TXCC_MGNFS_MULT_101(n) ((0x4055 | ((n) << 9)) << 2) +#define TX_TXCC_MGNFS_MULT_110(n) ((0x4056 | ((n) << 9)) << 2) +#define TX_TXCC_MGNFS_MULT_111(n) ((0x4057 | ((n) << 9)) << 2) +#define XCVR_DIAG_PLLDRC_CTRL(n) ((0x40e0 | ((n) << 9)) << 2) +#define XCVR_DIAG_BIDI_CTRL(n) ((0x40e8 | ((n) << 9)) << 2) +#define XCVR_DIAG_LANE_FCM_EN_MGN(n) ((0x40f2 | ((n) << 9)) << 2) +#define TX_PSC_A0(n) ((0x4100 | ((n) << 9)) << 2) +#define TX_PSC_A1(n) ((0x4101 | ((n) << 9)) << 2) +#define TX_PSC_A2(n) ((0x4102 | ((n) << 9)) << 2) +#define TX_PSC_A3(n) ((0x4103 | ((n) << 9)) << 2) +#define TX_RCVDET_CTRL(n) ((0x4120 | ((n) << 9)) << 2) +#define TX_RCVDET_EN_TMR(n) ((0x4122 | ((n) << 9)) << 2) +#define TX_RCVDET_ST_TMR(n) ((0x4123 | ((n) << 9)) << 2) +#define TX_DIAG_TX_DRV(n) ((0x41e1 | ((n) << 9)) << 2) +#define TX_DIAG_BGREF_PREDRV_DELAY (0x41e7 << 2) +#define TX_ANA_CTRL_REG_1 (0x5020 << 2) +#define TX_ANA_CTRL_REG_2 (0x5021 << 2) +#define TXDA_COEFF_CALC_CTRL (0x5022 << 2) +#define TX_DIG_CTRL_REG_2 (0x5024 << 2) +#define TXDA_CYA_AUXDA_CYA (0x5025 << 2) +#define TX_ANA_CTRL_REG_3 (0x5026 << 2) +#define TX_ANA_CTRL_REG_4 (0x5027 << 2) +#define TX_ANA_CTRL_REG_5 (0x5029 << 2) + +#define RX_PSC_A0(n) ((0x8000 | ((n) << 9)) << 2) +#define RX_PSC_A1(n) ((0x8001 | ((n) << 9)) << 2) +#define RX_PSC_A2(n) ((0x8002 | ((n) << 9)) << 2) +#define RX_PSC_A3(n) ((0x8003 | ((n) << 9)) << 2) +#define RX_PSC_CAL(n) ((0x8006 | ((n) << 9)) << 2) +#define RX_PSC_RDY(n) ((0x8007 | ((n) << 9)) << 2) +#define RX_IQPI_ILL_CAL_OVRD (0x8023 << 2) +#define RX_EPI_ILL_CAL_OVRD (0x8033 << 2) +#define RX_SDCAL0_OVRD (0x8041 << 2) +#define RX_SDCAL1_OVRD (0x8049 << 2) +#define RX_SLC_INIT (0x806d << 2) +#define RX_SLC_RUN (0x806e << 2) +#define RX_CDRLF_CNFG2 (0x8081 << 2) +#define RX_SIGDET_HL_FILT_TMR(n) ((0x8090 | ((n) << 9)) << 2) +#define RX_SLC_IOP0_OVRD (0x8101 << 2) +#define RX_SLC_IOP1_OVRD (0x8105 << 2) +#define RX_SLC_QOP0_OVRD (0x8109 << 2) +#define RX_SLC_QOP1_OVRD (0x810d << 2) +#define RX_SLC_EOP0_OVRD (0x8111 << 2) +#define RX_SLC_EOP1_OVRD (0x8115 << 2) +#define RX_SLC_ION0_OVRD (0x8119 << 2) +#define RX_SLC_ION1_OVRD (0x811d << 2) +#define RX_SLC_QON0_OVRD (0x8121 << 2) +#define RX_SLC_QON1_OVRD (0x8125 << 2) +#define RX_SLC_EON0_OVRD (0x8129 << 2) +#define RX_SLC_EON1_OVRD (0x812d << 2) +#define RX_SLC_IEP0_OVRD (0x8131 << 2) +#define RX_SLC_IEP1_OVRD (0x8135 << 2) +#define RX_SLC_QEP0_OVRD (0x8139 << 2) +#define RX_SLC_QEP1_OVRD (0x813d << 2) +#define RX_SLC_EEP0_OVRD (0x8141 << 2) +#define RX_SLC_EEP1_OVRD (0x8145 << 2) +#define RX_SLC_IEN0_OVRD (0x8149 << 2) +#define RX_SLC_IEN1_OVRD (0x814d << 2) +#define RX_SLC_QEN0_OVRD (0x8151 << 2) +#define RX_SLC_QEN1_OVRD (0x8155 << 2) +#define RX_SLC_EEN0_OVRD (0x8159 << 2) +#define RX_SLC_EEN1_OVRD (0x815d << 2) +#define RX_REE_CTRL_DATA_MASK(n) ((0x81bb | ((n) << 9)) << 2) +#define RX_DIAG_SIGDET_TUNE(n) ((0x81dc | ((n) << 9)) << 2) +#define RX_DIAG_SC2C_DELAY (0x81e1 << 2) + +#define PMA_LANE_CFG (0xc000 << 2) +#define PIPE_CMN_CTRL1 (0xc001 << 2) +#define PIPE_CMN_CTRL2 (0xc002 << 2) +#define PIPE_COM_LOCK_CFG1 (0xc003 << 2) +#define PIPE_COM_LOCK_CFG2 (0xc004 << 2) +#define PIPE_RCV_DET_INH (0xc005 << 2) +#define DP_MODE_CTL (0xc008 << 2) +#define DP_CLK_CTL (0xc009 << 2) +#define STS (0xc00F << 2) +#define PHY_ISO_CMN_CTRL (0xc010 << 2) +#define PHY_DP_TX_CTL (0xc408 << 2) +#define PMA_CMN_CTRL1 (0xc800 << 2) +#define PHY_PMA_ISO_CMN_CTRL (0xc810 << 2) +#define PHY_ISOLATION_CTRL (0xc81f << 2) +#define PHY_PMA_ISO_XCVR_CTRL(n) ((0xcc11 | ((n) << 6)) << 2) +#define PHY_PMA_ISO_LINK_MODE(n) ((0xcc12 | ((n) << 6)) << 2) +#define PHY_PMA_ISO_PWRST_CTRL(n) ((0xcc13 | ((n) << 6)) << 2) +#define PHY_PMA_ISO_TX_DATA_LO(n) ((0xcc14 | ((n) << 6)) << 2) +#define PHY_PMA_ISO_TX_DATA_HI(n) ((0xcc15 | ((n) << 6)) << 2) +#define PHY_PMA_ISO_RX_DATA_LO(n) ((0xcc16 | ((n) << 6)) << 2) +#define PHY_PMA_ISO_RX_DATA_HI(n) ((0xcc17 | ((n) << 6)) << 2) +#define TX_BIST_CTRL(n) ((0x4140 | ((n) << 9)) << 2) +#define TX_BIST_UDDWR(n) ((0x4141 | ((n) << 9)) << 2) + +/* + * Selects which PLL clock will be driven on the analog high speed + * clock 0: PLL 0 div 1 + * clock 1: PLL 1 div 2 + */ +#define CLK_PLL_CONFIG 0X30 +#define CLK_PLL_MASK 0x33 + +#define CMN_READY BIT(0) + +#define DP_PLL_CLOCK_ENABLE BIT(2) +#define DP_PLL_ENABLE BIT(0) +#define DP_PLL_DATA_RATE_RBR ((2 << 12) | (4 << 8)) +#define DP_PLL_DATA_RATE_HBR ((2 << 12) | (4 << 8)) +#define DP_PLL_DATA_RATE_HBR2 ((1 << 12) | (2 << 8)) + +#define DP_MODE_A0 BIT(4) +#define DP_MODE_A2 BIT(6) +#define DP_MODE_ENTER_A0 0xc101 +#define DP_MODE_ENTER_A2 0xc104 + +#define PHY_MODE_SET_TIMEOUT 100000 + +#define PIN_ASSIGN_C_E 0x51d9 +#define PIN_ASSIGN_D_F 0x5100 + +#define MODE_DISCONNECT 0 +#define MODE_UFP_USB BIT(0) +#define MODE_DFP_USB BIT(1) +#define MODE_DFP_DP BIT(2) + +struct usb3phy_reg { + u32 offset; + u32 enable_bit; + u32 write_enable; +}; + +struct rockchip_usb3phy_port_cfg { + struct usb3phy_reg typec_conn_dir; + struct usb3phy_reg usb3tousb2_en; + struct usb3phy_reg external_psm; + struct usb3phy_reg pipe_status; +}; + +struct rockchip_typec_phy { + struct device *dev; + void __iomem *base; + struct extcon_dev *extcon; + struct regmap *grf_regs; + struct clk *clk_core; + struct clk *clk_ref; + struct reset_control *uphy_rst; + struct reset_control *pipe_rst; + struct reset_control *tcphy_rst; + struct rockchip_usb3phy_port_cfg port_cfgs; + /* mutex to protect access to individual PHYs */ + struct mutex lock; + + bool flip; + u8 mode; +}; + +struct phy_reg { + u16 value; + u32 addr; +}; + +struct phy_reg usb3_pll_cfg[] = { + { 0xf0, CMN_PLL0_VCOCAL_INIT }, + { 0x18, CMN_PLL0_VCOCAL_ITER }, + { 0xd0, CMN_PLL0_INTDIV }, + { 0x4a4a, CMN_PLL0_FRACDIV }, + { 0x34, CMN_PLL0_HIGH_THR }, + { 0x1ee, CMN_PLL0_SS_CTRL1 }, + { 0x7f03, CMN_PLL0_SS_CTRL2 }, + { 0x20, CMN_PLL0_DSM_DIAG }, + { 0, CMN_DIAG_PLL0_OVRD }, + { 0, CMN_DIAG_PLL0_FBH_OVRD }, + { 0, CMN_DIAG_PLL0_FBL_OVRD }, + { 0x7, CMN_DIAG_PLL0_V2I_TUNE }, + { 0x45, CMN_DIAG_PLL0_CP_TUNE }, + { 0x8, CMN_DIAG_PLL0_LF_PROG }, +}; + +struct phy_reg dp_pll_cfg[] = { + { 0xf0, CMN_PLL1_VCOCAL_INIT }, + { 0x18, CMN_PLL1_VCOCAL_ITER }, + { 0x30b9, CMN_PLL1_VCOCAL_START }, + { 0x21c, CMN_PLL1_INTDIV }, + { 0, CMN_PLL1_FRACDIV }, + { 0x5, CMN_PLL1_HIGH_THR }, + { 0x35, CMN_PLL1_SS_CTRL1 }, + { 0x7f1e, CMN_PLL1_SS_CTRL2 }, + { 0x20, CMN_PLL1_DSM_DIAG }, + { 0, CMN_PLLSM1_USER_DEF_CTRL }, + { 0, CMN_DIAG_PLL1_OVRD }, + { 0, CMN_DIAG_PLL1_FBH_OVRD }, + { 0, CMN_DIAG_PLL1_FBL_OVRD }, + { 0x6, CMN_DIAG_PLL1_V2I_TUNE }, + { 0x45, CMN_DIAG_PLL1_CP_TUNE }, + { 0x8, CMN_DIAG_PLL1_LF_PROG }, + { 0x100, CMN_DIAG_PLL1_PTATIS_TUNE1 }, + { 0x7, CMN_DIAG_PLL1_PTATIS_TUNE2 }, + { 0x4, CMN_DIAG_PLL1_INCLK_CTRL }, +}; + +static void tcphy_cfg_24m(struct rockchip_typec_phy *tcphy) +{ + u32 i, rdata; + + /* + * cmn_ref_clk_sel = 3, select the 24Mhz for clk parent + * cmn_psm_clk_dig_div = 2, set the clk division to 2 + */ + writel(0x830, tcphy->base + PMA_CMN_CTRL1); + for (i = 0; i < 4; i++) { + /* + * The following PHY configuration assumes a 24 MHz reference + * clock. + */ + writel(0x90, tcphy->base + XCVR_DIAG_LANE_FCM_EN_MGN(i)); + writel(0x960, tcphy->base + TX_RCVDET_EN_TMR(i)); + writel(0x30, tcphy->base + TX_RCVDET_ST_TMR(i)); + } + + rdata = readl(tcphy->base + CMN_DIAG_HSCLK_SEL); + rdata &= ~CLK_PLL_MASK; + rdata |= CLK_PLL_CONFIG; + writel(rdata, tcphy->base + CMN_DIAG_HSCLK_SEL); +} + +static void tcphy_cfg_usb3_pll(struct rockchip_typec_phy *tcphy) +{ + u32 i; + + /* load the configuration of PLL0 */ + for (i = 0; i < ARRAY_SIZE(usb3_pll_cfg); i++) + writel(usb3_pll_cfg[i].value, + tcphy->base + usb3_pll_cfg[i].addr); +} + +static void tcphy_cfg_dp_pll(struct rockchip_typec_phy *tcphy) +{ + u32 i; + + /* set the default mode to RBR */ + writel(DP_PLL_CLOCK_ENABLE | DP_PLL_ENABLE | DP_PLL_DATA_RATE_RBR, + tcphy->base + DP_CLK_CTL); + + /* load the configuration of PLL1 */ + for (i = 0; i < ARRAY_SIZE(dp_pll_cfg); i++) + writel(dp_pll_cfg[i].value, tcphy->base + dp_pll_cfg[i].addr); +} + +static void tcphy_tx_usb3_cfg_lane(struct rockchip_typec_phy *tcphy, u32 lane) +{ + writel(0x7799, tcphy->base + TX_PSC_A0(lane)); + writel(0x7798, tcphy->base + TX_PSC_A1(lane)); + writel(0x5098, tcphy->base + TX_PSC_A2(lane)); + writel(0x5098, tcphy->base + TX_PSC_A3(lane)); + writel(0, tcphy->base + TX_TXCC_MGNFS_MULT_000(lane)); + writel(0xbf, tcphy->base + XCVR_DIAG_BIDI_CTRL(lane)); +} + +static void tcphy_rx_usb3_cfg_lane(struct rockchip_typec_phy *tcphy, u32 lane) +{ + writel(0xa6fd, tcphy->base + RX_PSC_A0(lane)); + writel(0xa6fd, tcphy->base + RX_PSC_A1(lane)); + writel(0xa410, tcphy->base + RX_PSC_A2(lane)); + writel(0x2410, tcphy->base + RX_PSC_A3(lane)); + writel(0x23ff, tcphy->base + RX_PSC_CAL(lane)); + writel(0x13, tcphy->base + RX_SIGDET_HL_FILT_TMR(lane)); + writel(0x03e7, tcphy->base + RX_REE_CTRL_DATA_MASK(lane)); + writel(0x1004, tcphy->base + RX_DIAG_SIGDET_TUNE(lane)); + writel(0x2010, tcphy->base + RX_PSC_RDY(lane)); + writel(0xfb, tcphy->base + XCVR_DIAG_BIDI_CTRL(lane)); +} + +static void tcphy_dp_cfg_lane(struct rockchip_typec_phy *tcphy, u32 lane) +{ + u16 rdata; + + writel(0xbefc, tcphy->base + XCVR_PSM_RCTRL(lane)); + writel(0x6799, tcphy->base + TX_PSC_A0(lane)); + writel(0x6798, tcphy->base + TX_PSC_A1(lane)); + writel(0x98, tcphy->base + TX_PSC_A2(lane)); + writel(0x98, tcphy->base + TX_PSC_A3(lane)); + + writel(0, tcphy->base + TX_TXCC_MGNFS_MULT_000(lane)); + writel(0, tcphy->base + TX_TXCC_MGNFS_MULT_001(lane)); + writel(0, tcphy->base + TX_TXCC_MGNFS_MULT_010(lane)); + writel(0, tcphy->base + TX_TXCC_MGNFS_MULT_011(lane)); + writel(0, tcphy->base + TX_TXCC_MGNFS_MULT_100(lane)); + writel(0, tcphy->base + TX_TXCC_MGNFS_MULT_101(lane)); + writel(0, tcphy->base + TX_TXCC_MGNFS_MULT_110(lane)); + writel(0, tcphy->base + TX_TXCC_MGNFS_MULT_111(lane)); + writel(0, tcphy->base + TX_TXCC_CPOST_MULT_10(lane)); + writel(0, tcphy->base + TX_TXCC_CPOST_MULT_01(lane)); + writel(0, tcphy->base + TX_TXCC_CPOST_MULT_00(lane)); + writel(0, tcphy->base + TX_TXCC_CPOST_MULT_11(lane)); + + writel(0x128, tcphy->base + TX_TXCC_CAL_SCLR_MULT(lane)); + writel(0x400, tcphy->base + TX_DIAG_TX_DRV(lane)); + + rdata = readl(tcphy->base + XCVR_DIAG_PLLDRC_CTRL(lane)); + rdata = (rdata & 0x8fff) | 0x6000; + writel(rdata, tcphy->base + XCVR_DIAG_PLLDRC_CTRL(lane)); +} + +static inline int property_enable(struct rockchip_typec_phy *tcphy, + const struct usb3phy_reg *reg, bool en) +{ + u32 mask = 1 << reg->write_enable; + u32 val = en << reg->enable_bit; + + return regmap_write(tcphy->grf_regs, reg->offset, val | mask); +} + +static void tcphy_dp_aux_calibration(struct rockchip_typec_phy *tcphy) +{ + u16 rdata, rdata2, val; + + /* disable txda_cal_latch_en for rewrite the calibration values */ + rdata = readl(tcphy->base + TX_ANA_CTRL_REG_1); + val = rdata & 0xdfff; + writel(val, tcphy->base + TX_ANA_CTRL_REG_1); + + /* + * read a resistor calibration code from CMN_TXPUCAL_CTRL[6:0] and + * write it to TX_DIG_CTRL_REG_2[6:0], and delay 1ms to make sure it + * works. + */ + rdata = readl(tcphy->base + TX_DIG_CTRL_REG_2); + rdata = rdata & 0xffc0; + + rdata2 = readl(tcphy->base + CMN_TXPUCAL_CTRL); + rdata2 = rdata2 & 0x3f; + + val = rdata | rdata2; + writel(val, tcphy->base + TX_DIG_CTRL_REG_2); + usleep_range(1000, 1050); + + /* + * Enable signal for latch that sample and holds calibration values. + * Activate this signal for 1 clock cycle to sample new calibration + * values. + */ + rdata = readl(tcphy->base + TX_ANA_CTRL_REG_1); + val = rdata | 0x2000; + writel(val, tcphy->base + TX_ANA_CTRL_REG_1); + usleep_range(150, 200); + + /* set TX Voltage Level and TX Deemphasis to 0 */ + writel(0, tcphy->base + PHY_DP_TX_CTL); + /* re-enable decap */ + writel(0x100, tcphy->base + TX_ANA_CTRL_REG_2); + writel(0x300, tcphy->base + TX_ANA_CTRL_REG_2); + writel(0x2008, tcphy->base + TX_ANA_CTRL_REG_1); + writel(0x2018, tcphy->base + TX_ANA_CTRL_REG_1); + + writel(0, tcphy->base + TX_ANA_CTRL_REG_5); + + /* + * Programs txda_drv_ldo_prog[15:0], Sets driver LDO + * voltage 16'h1001 for DP-AUX-TX and RX + */ + writel(0x1001, tcphy->base + TX_ANA_CTRL_REG_4); + + /* re-enables Bandgap reference for LDO */ + writel(0x2098, tcphy->base + TX_ANA_CTRL_REG_1); + writel(0x2198, tcphy->base + TX_ANA_CTRL_REG_1); + + /* + * re-enables the transmitter pre-driver, driver data selection MUX, + * and receiver detect circuits. + */ + writel(0x301, tcphy->base + TX_ANA_CTRL_REG_2); + writel(0x303, tcphy->base + TX_ANA_CTRL_REG_2); + + /* + * BIT 12: Controls auxda_polarity, which selects the polarity of the + * xcvr: + * 1, Reverses the polarity (If TYPEC, Pulls ups aux_p and pull + * down aux_m) + * 0, Normal polarity (if TYPE_C, pulls up aux_m and pulls down + * aux_p) + */ + val = 0xa078; + if (!tcphy->flip) + val |= BIT(12); + writel(val, tcphy->base + TX_ANA_CTRL_REG_1); + + writel(0, tcphy->base + TX_ANA_CTRL_REG_3); + writel(0, tcphy->base + TX_ANA_CTRL_REG_4); + writel(0, tcphy->base + TX_ANA_CTRL_REG_5); + + /* + * Controls low_power_swing_en, set the voltage swing of the driver + * to 400mv. The values below are peak to peak (differential) values. + */ + writel(4, tcphy->base + TXDA_COEFF_CALC_CTRL); + writel(0, tcphy->base + TXDA_CYA_AUXDA_CYA); + + /* Controls tx_high_z_tm_en */ + val = readl(tcphy->base + TX_DIG_CTRL_REG_2); + val |= BIT(15); + writel(val, tcphy->base + TX_DIG_CTRL_REG_2); +} + +static int tcphy_phy_init(struct rockchip_typec_phy *tcphy, u8 mode) +{ + struct rockchip_usb3phy_port_cfg *cfg = &tcphy->port_cfgs; + int ret, i; + u32 val; + + ret = clk_prepare_enable(tcphy->clk_core); + if (ret) { + dev_err(tcphy->dev, "Failed to prepare_enable core clock\n"); + return ret; + } + + ret = clk_prepare_enable(tcphy->clk_ref); + if (ret) { + dev_err(tcphy->dev, "Failed to prepare_enable ref clock\n"); + goto err_clk_core; + } + + reset_control_deassert(tcphy->tcphy_rst); + + property_enable(tcphy, &cfg->typec_conn_dir, tcphy->flip); + + tcphy_cfg_24m(tcphy); + + if (mode == MODE_DFP_DP) { + tcphy_cfg_dp_pll(tcphy); + for (i = 0; i < 4; i++) + tcphy_dp_cfg_lane(tcphy, i); + + writel(PIN_ASSIGN_C_E, tcphy->base + PMA_LANE_CFG); + } else { + tcphy_cfg_usb3_pll(tcphy); + tcphy_cfg_dp_pll(tcphy); + if (tcphy->flip) { + tcphy_tx_usb3_cfg_lane(tcphy, 3); + tcphy_rx_usb3_cfg_lane(tcphy, 2); + tcphy_dp_cfg_lane(tcphy, 0); + tcphy_dp_cfg_lane(tcphy, 1); + } else { + tcphy_tx_usb3_cfg_lane(tcphy, 0); + tcphy_rx_usb3_cfg_lane(tcphy, 1); + tcphy_dp_cfg_lane(tcphy, 2); + tcphy_dp_cfg_lane(tcphy, 3); + } + + writel(PIN_ASSIGN_D_F, tcphy->base + PMA_LANE_CFG); + } + + writel(DP_MODE_ENTER_A2, tcphy->base + DP_MODE_CTL); + + reset_control_deassert(tcphy->uphy_rst); + + ret = readx_poll_timeout(readl, tcphy->base + PMA_CMN_CTRL1, + val, val & CMN_READY, 10, + PHY_MODE_SET_TIMEOUT); + if (ret < 0) { + dev_err(tcphy->dev, "wait pma ready timeout\n"); + ret = -ETIMEDOUT; + goto err_wait_pma; + } + + reset_control_deassert(tcphy->pipe_rst); + + return 0; + +err_wait_pma: + reset_control_assert(tcphy->uphy_rst); + reset_control_assert(tcphy->tcphy_rst); + clk_disable_unprepare(tcphy->clk_ref); +err_clk_core: + clk_disable_unprepare(tcphy->clk_core); + return ret; +} + +static void tcphy_phy_deinit(struct rockchip_typec_phy *tcphy) +{ + reset_control_assert(tcphy->tcphy_rst); + reset_control_assert(tcphy->uphy_rst); + reset_control_assert(tcphy->pipe_rst); + clk_disable_unprepare(tcphy->clk_core); + clk_disable_unprepare(tcphy->clk_ref); +} + +static int tcphy_get_mode(struct rockchip_typec_phy *tcphy) +{ + struct extcon_dev *edev = tcphy->extcon; + union extcon_property_value property; + unsigned int id; + bool dfp, ufp, dp; + u8 mode; + int ret; + + ufp = extcon_get_state(edev, EXTCON_USB); + dfp = extcon_get_state(edev, EXTCON_USB_HOST); + dp = extcon_get_state(edev, EXTCON_DISP_DP); + + mode = MODE_DFP_USB; + id = EXTCON_USB_HOST; + + if (ufp) { + mode = MODE_UFP_USB; + id = EXTCON_USB; + } else if (dp) { + mode = MODE_DFP_DP; + id = EXTCON_DISP_DP; + + ret = extcon_get_property(edev, id, EXTCON_PROP_USB_SS, + &property); + if (ret) { + dev_err(tcphy->dev, "get superspeed property failed\n"); + return ret; + } + + if (property.intval) + mode |= MODE_DFP_USB; + } + + ret = extcon_get_property(edev, id, EXTCON_PROP_USB_TYPEC_POLARITY, + &property); + if (ret) { + dev_err(tcphy->dev, "get polarity property failed\n"); + return ret; + } + + tcphy->flip = property.intval ? 1 : 0; + + return mode; +} + +static int rockchip_usb3_phy_power_on(struct phy *phy) +{ + struct rockchip_typec_phy *tcphy = phy_get_drvdata(phy); + struct rockchip_usb3phy_port_cfg *cfg = &tcphy->port_cfgs; + const struct usb3phy_reg *reg = &cfg->pipe_status; + int timeout, new_mode, ret = 0; + u32 val; + + mutex_lock(&tcphy->lock); + + new_mode = tcphy_get_mode(tcphy); + if (new_mode < 0) { + ret = new_mode; + goto unlock_ret; + } + + /* DP-only mode; fall back to USB2 */ + if (!(new_mode & (MODE_DFP_USB | MODE_UFP_USB))) + goto unlock_ret; + + if (tcphy->mode == new_mode) + goto unlock_ret; + + if (tcphy->mode == MODE_DISCONNECT) + tcphy_phy_init(tcphy, new_mode); + + /* wait TCPHY for pipe ready */ + for (timeout = 0; timeout < 100; timeout++) { + regmap_read(tcphy->grf_regs, reg->offset, &val); + if (!(val & BIT(reg->enable_bit))) { + tcphy->mode |= new_mode & (MODE_DFP_USB | MODE_UFP_USB); + goto unlock_ret; + } + usleep_range(10, 20); + } + + if (tcphy->mode == MODE_DISCONNECT) + tcphy_phy_deinit(tcphy); + + ret = -ETIMEDOUT; + +unlock_ret: + mutex_unlock(&tcphy->lock); + return ret; +} + +static int rockchip_usb3_phy_power_off(struct phy *phy) +{ + struct rockchip_typec_phy *tcphy = phy_get_drvdata(phy); + + mutex_lock(&tcphy->lock); + + if (tcphy->mode == MODE_DISCONNECT) + goto unlock; + + tcphy->mode &= ~(MODE_UFP_USB | MODE_DFP_USB); + if (tcphy->mode == MODE_DISCONNECT) + tcphy_phy_deinit(tcphy); + +unlock: + mutex_unlock(&tcphy->lock); + return 0; +} + +static const struct phy_ops rockchip_usb3_phy_ops = { + .power_on = rockchip_usb3_phy_power_on, + .power_off = rockchip_usb3_phy_power_off, + .owner = THIS_MODULE, +}; + +static int rockchip_dp_phy_power_on(struct phy *phy) +{ + struct rockchip_typec_phy *tcphy = phy_get_drvdata(phy); + int new_mode, ret = 0; + u32 val; + + mutex_lock(&tcphy->lock); + + new_mode = tcphy_get_mode(tcphy); + if (new_mode < 0) { + ret = new_mode; + goto unlock_ret; + } + + if (!(new_mode & MODE_DFP_DP)) { + ret = -ENODEV; + goto unlock_ret; + } + + if (tcphy->mode == new_mode) + goto unlock_ret; + + /* + * If the PHY has been power on, but the mode is not DP only mode, + * re-init the PHY for setting all of 4 lanes to DP. + */ + if (new_mode == MODE_DFP_DP && tcphy->mode != MODE_DISCONNECT) { + tcphy_phy_deinit(tcphy); + tcphy_phy_init(tcphy, new_mode); + } else if (tcphy->mode == MODE_DISCONNECT) { + tcphy_phy_init(tcphy, new_mode); + } + + ret = readx_poll_timeout(readl, tcphy->base + DP_MODE_CTL, + val, val & DP_MODE_A2, 1000, + PHY_MODE_SET_TIMEOUT); + if (ret < 0) { + dev_err(tcphy->dev, "failed to wait TCPHY enter A2\n"); + goto power_on_finish; + } + + tcphy_dp_aux_calibration(tcphy); + + writel(DP_MODE_ENTER_A0, tcphy->base + DP_MODE_CTL); + + ret = readx_poll_timeout(readl, tcphy->base + DP_MODE_CTL, + val, val & DP_MODE_A0, 1000, + PHY_MODE_SET_TIMEOUT); + if (ret < 0) { + writel(DP_MODE_ENTER_A2, tcphy->base + DP_MODE_CTL); + dev_err(tcphy->dev, "failed to wait TCPHY enter A0\n"); + goto power_on_finish; + } + + tcphy->mode |= MODE_DFP_DP; + +power_on_finish: + if (tcphy->mode == MODE_DISCONNECT) + tcphy_phy_deinit(tcphy); +unlock_ret: + mutex_unlock(&tcphy->lock); + return ret; +} + +static int rockchip_dp_phy_power_off(struct phy *phy) +{ + struct rockchip_typec_phy *tcphy = phy_get_drvdata(phy); + + mutex_lock(&tcphy->lock); + + if (tcphy->mode == MODE_DISCONNECT) + goto unlock; + + tcphy->mode &= ~MODE_DFP_DP; + + writel(DP_MODE_ENTER_A2, tcphy->base + DP_MODE_CTL); + + if (tcphy->mode == MODE_DISCONNECT) + tcphy_phy_deinit(tcphy); + +unlock: + mutex_unlock(&tcphy->lock); + return 0; +} + +static const struct phy_ops rockchip_dp_phy_ops = { + .power_on = rockchip_dp_phy_power_on, + .power_off = rockchip_dp_phy_power_off, + .owner = THIS_MODULE, +}; + +static int tcphy_get_param(struct device *dev, + struct usb3phy_reg *reg, + const char *name) +{ + u32 buffer[3]; + int ret; + + ret = of_property_read_u32_array(dev->of_node, name, buffer, 3); + if (ret) { + dev_err(dev, "Can not parse %s\n", name); + return ret; + } + + reg->offset = buffer[0]; + reg->enable_bit = buffer[1]; + reg->write_enable = buffer[2]; + return 0; +} + +static int tcphy_parse_dt(struct rockchip_typec_phy *tcphy, + struct device *dev) +{ + struct rockchip_usb3phy_port_cfg *cfg = &tcphy->port_cfgs; + int ret; + + ret = tcphy_get_param(dev, &cfg->typec_conn_dir, + "rockchip,typec-conn-dir"); + if (ret) + return ret; + + ret = tcphy_get_param(dev, &cfg->usb3tousb2_en, + "rockchip,usb3tousb2-en"); + if (ret) + return ret; + + ret = tcphy_get_param(dev, &cfg->external_psm, + "rockchip,external-psm"); + if (ret) + return ret; + + ret = tcphy_get_param(dev, &cfg->pipe_status, + "rockchip,pipe-status"); + if (ret) + return ret; + + tcphy->grf_regs = syscon_regmap_lookup_by_phandle(dev->of_node, + "rockchip,grf"); + if (IS_ERR(tcphy->grf_regs)) { + dev_err(dev, "could not find grf dt node\n"); + return PTR_ERR(tcphy->grf_regs); + } + + tcphy->clk_core = devm_clk_get(dev, "tcpdcore"); + if (IS_ERR(tcphy->clk_core)) { + dev_err(dev, "could not get uphy core clock\n"); + return PTR_ERR(tcphy->clk_core); + } + + tcphy->clk_ref = devm_clk_get(dev, "tcpdphy-ref"); + if (IS_ERR(tcphy->clk_ref)) { + dev_err(dev, "could not get uphy ref clock\n"); + return PTR_ERR(tcphy->clk_ref); + } + + tcphy->uphy_rst = devm_reset_control_get(dev, "uphy"); + if (IS_ERR(tcphy->uphy_rst)) { + dev_err(dev, "no uphy_rst reset control found\n"); + return PTR_ERR(tcphy->uphy_rst); + } + + tcphy->pipe_rst = devm_reset_control_get(dev, "uphy-pipe"); + if (IS_ERR(tcphy->pipe_rst)) { + dev_err(dev, "no pipe_rst reset control found\n"); + return PTR_ERR(tcphy->pipe_rst); + } + + tcphy->tcphy_rst = devm_reset_control_get(dev, "uphy-tcphy"); + if (IS_ERR(tcphy->tcphy_rst)) { + dev_err(dev, "no tcphy_rst reset control found\n"); + return PTR_ERR(tcphy->tcphy_rst); + } + + return 0; +} + +static void typec_phy_pre_init(struct rockchip_typec_phy *tcphy) +{ + struct rockchip_usb3phy_port_cfg *cfg = &tcphy->port_cfgs; + + reset_control_assert(tcphy->tcphy_rst); + reset_control_assert(tcphy->uphy_rst); + reset_control_assert(tcphy->pipe_rst); + + /* select external psm clock */ + property_enable(tcphy, &cfg->external_psm, 1); + property_enable(tcphy, &cfg->usb3tousb2_en, 0); + + tcphy->mode = MODE_DISCONNECT; +} + +static int rockchip_typec_phy_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct device_node *np = dev->of_node; + struct device_node *child_np; + struct rockchip_typec_phy *tcphy; + struct phy_provider *phy_provider; + struct resource *res; + int ret; + + tcphy = devm_kzalloc(dev, sizeof(*tcphy), GFP_KERNEL); + if (!tcphy) + return -ENOMEM; + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + tcphy->base = devm_ioremap_resource(dev, res); + if (IS_ERR(tcphy->base)) + return PTR_ERR(tcphy->base); + + ret = tcphy_parse_dt(tcphy, dev); + if (ret) + return ret; + + tcphy->dev = dev; + platform_set_drvdata(pdev, tcphy); + mutex_init(&tcphy->lock); + + typec_phy_pre_init(tcphy); + + tcphy->extcon = extcon_get_edev_by_phandle(dev, 0); + if (IS_ERR(tcphy->extcon)) { + if (PTR_ERR(tcphy->extcon) != -EPROBE_DEFER) + dev_err(dev, "Invalid or missing extcon\n"); + return PTR_ERR(tcphy->extcon); + } + + pm_runtime_enable(dev); + + for_each_available_child_of_node(np, child_np) { + struct phy *phy; + + if (!of_node_cmp(child_np->name, "dp-port")) + phy = devm_phy_create(dev, child_np, + &rockchip_dp_phy_ops); + else if (!of_node_cmp(child_np->name, "usb3-port")) + phy = devm_phy_create(dev, child_np, + &rockchip_usb3_phy_ops); + else + continue; + + if (IS_ERR(phy)) { + dev_err(dev, "failed to create phy: %s\n", + child_np->name); + return PTR_ERR(phy); + } + + phy_set_drvdata(phy, tcphy); + } + + phy_provider = devm_of_phy_provider_register(dev, of_phy_simple_xlate); + if (IS_ERR(phy_provider)) { + dev_err(dev, "Failed to register phy provider\n"); + return PTR_ERR(phy_provider); + } + + return 0; +} + +static int rockchip_typec_phy_remove(struct platform_device *pdev) +{ + pm_runtime_disable(&pdev->dev); + + return 0; +} + +static const struct of_device_id rockchip_typec_phy_dt_ids[] = { + { .compatible = "rockchip,rk3399-typec-phy" }, + {} +}; + +MODULE_DEVICE_TABLE(of, rockchip_typec_phy_dt_ids); + +static struct platform_driver rockchip_typec_phy_driver = { + .probe = rockchip_typec_phy_probe, + .remove = rockchip_typec_phy_remove, + .driver = { + .name = "rockchip-typec-phy", + .of_match_table = rockchip_typec_phy_dt_ids, + }, +}; + +module_platform_driver(rockchip_typec_phy_driver); + +MODULE_AUTHOR("Chris Zhong <zyw@rock-chips.com>"); +MODULE_AUTHOR("Kever Yang <kever.yang@rock-chips.com>"); +MODULE_DESCRIPTION("Rockchip USB TYPE-C PHY driver"); +MODULE_LICENSE("GPL v2"); |