/* Copyright 2021 The Chromium OS Authors. All rights reserved. * Use of this source code is governed by a BSD-style license that can be * found in the LICENSE file. */ /* Richtek RT1715 Type-C port controller */ #include "common.h" #include "rt1715.h" #include "tcpm/tcpci.h" #include "tcpm/tcpm.h" #include "timer.h" #include "usb_pd.h" #include "usb_pd_tcpm.h" #ifndef CONFIG_USB_PD_TCPM_TCPCI #error "RT1715 is using a standard TCPCI interface" #error "Please upgrade your board configuration" #endif static int rt1715_polarity[CONFIG_USB_PD_PORT_MAX_COUNT]; static bool rt1715_initialized[CONFIG_USB_PD_PORT_MAX_COUNT]; static int rt1715_enable_ext_messages(int port, int enable) { return tcpc_update8(port, RT1715_REG_VENDOR_5, RT1715_REG_VENDOR_5_ENEXTMSG, enable ? MASK_SET : MASK_CLR); } static int rt1715_tcpci_tcpm_init(int port) { int rv; /* * Do not fully reinitialize the registers when leaving low-power mode. * TODO(b/179234089): Generalize this concept in the tcpm_drv API. */ /* Only do soft-reset on first init. */ if (!(rt1715_initialized[port])) { /* RT1715 has a vendor-defined register reset */ rv = tcpc_update8(port, RT1715_REG_VENDOR_7, RT1715_REG_VENDOR_7_SOFT_RESET, MASK_SET); if (rv) return rv; rt1715_initialized[port] = true; msleep(10); } rv = tcpc_update8(port, RT1715_REG_VENDOR_5, RT1715_REG_VENDOR_5_SHUTDOWN_OFF, MASK_SET); if (rv) return rv; if (IS_ENABLED(CONFIG_USB_PD_REV30)) rt1715_enable_ext_messages(port, 1); rv = tcpc_write(port, RT1715_REG_I2CRST_CTRL, (RT1715_REG_I2CRST_CTRL_EN | RT1715_REG_I2CRST_CTRL_TOUT_200MS)); if (rv) return rv; /* Unmask interrupt for LPM wakeup */ rv = tcpc_write(port, RT1715_REG_RT_MASK, RT1715_REG_RT_MASK_M_WAKEUP); if (rv) return rv; /* * Set tTCPCFilter (CC debounce time) to 400 us * (min 250 us, max 500 us). */ rv = tcpc_write(port, RT1715_REG_TTCPC_FILTER, RT1715_REG_TTCPC_FILTER_400US); if (rv) return rv; rv = tcpc_write(port, RT1715_REG_DRP_TOGGLE_CYCLE, RT1715_REG_DRP_TOGGLE_CYCLE_76MS); if (rv) return rv; /* PHY control */ /* Set PHY control registers to Richtek recommended values */ rv = tcpc_write(port, RT1715_REG_PHY_CTRL1, (RT1715_REG_PHY_CTRL1_ENRETRY | RT1715_REG_PHY_CTRL1_TRANSCNT_7 | RT1715_REG_PHY_CTRL1_TRXFILTER_125NS)); if (rv) return rv; /* Set PHY control registers to Richtek recommended values */ rv = tcpc_write(port, RT1715_REG_PHY_CTRL2, RT1715_REG_PHY_CTRL2_CDRTHRESH_2_58US); if (rv) return rv; return tcpci_tcpm_init(port); } /* * Selects the CC PHY noise filter voltage level according to the current * CC voltage level. * * @param cc_level The CC voltage level for the port's current role * @return EC_SUCCESS if writes succeed; failure code otherwise */ static inline int rt1715_init_cc_params(int port, int cc_level) { int rv, en, sel; if (cc_level == TYPEC_CC_VOLT_RP_DEF) { /* RXCC threshold : 0.55V */ en = RT1715_REG_BMCIO_RXDZEN_DISABLE; sel = RT1715_REG_BMCIO_RXDZSEL_OCCTRL_600MA | RT1715_REG_BMCIO_RXDZSEL_SEL; } else { /* RD threshold : 0.35V & RP threshold : 0.75V */ en = RT1715_REG_BMCIO_RXDZEN_ENABLE; sel = RT1715_REG_BMCIO_RXDZSEL_OCCTRL_600MA | RT1715_REG_BMCIO_RXDZSEL_SEL; } rv = tcpc_write(port, RT1715_REG_BMCIO_RXDZEN, en); if (!rv) rv = tcpc_write(port, RT1715_REG_BMCIO_RXDZSEL, sel); return rv; } static int rt1715_get_cc(int port, enum tcpc_cc_voltage_status *cc1, enum tcpc_cc_voltage_status *cc2) { int rv; rv = tcpci_tcpm_get_cc(port, cc1, cc2); if (rv) return rv; return rt1715_init_cc_params(port, rt1715_polarity[port] ? *cc2 : *cc1); } /* * See b/179256608#comment26 for explanation. * Disable 24MHz oscillator and enable LPM. Upon exit from LPM, the LPEN will be * reset to 0. * * The exit condition for LPM is CC status change, and the wakeup interrupt will * be set. */ #ifdef CONFIG_USB_PD_TCPC_LOW_POWER static int rt1715_enter_low_power_mode(int port) { int regval; int rv; rv = tcpc_read(port, RT1715_REG_PWR, ®val); if (rv) return rv; regval |= RT1715_REG_PWR_BMCIO_LPEN; regval &= ~RT1715_REG_PWR_BMCIO_OSCEN; rv = tcpc_write(port, RT1715_REG_PWR, regval); if (rv) return rv; return tcpci_enter_low_power_mode(port); } #endif static int rt1715_set_vconn(int port, int enable) { int rv; int regval; /* * Auto-idle cannot be used while sourcing Vconn. * See b/179256608#comment26 for explanation. */ rv = tcpc_read(port, RT1715_REG_VENDOR_5, ®val); if (rv) return rv; if (enable) regval &= ~RT1715_REG_VENDOR_5_AUTOIDLE_EN; else regval |= RT1715_REG_VENDOR_5_AUTOIDLE_EN; rv = tcpc_write(port, RT1715_REG_VENDOR_5, regval); if (rv) return rv; return tcpci_tcpm_set_vconn(port, enable); } static int rt1715_set_polarity(int port, enum tcpc_cc_polarity polarity) { int rv; enum tcpc_cc_voltage_status cc1, cc2; rt1715_polarity[port] = polarity; rv = tcpci_tcpm_get_cc(port, &cc1, &cc2); if (rv) return rv; rv = rt1715_init_cc_params(port, polarity ? cc2 : cc1); if (rv) return rv; return tcpci_tcpm_set_polarity(port, polarity); } static void rt1715_alert(int port) { /* * Make sure the wakeup interrupt is cleared. This bit is set on wakeup * from LPM. See b/179256608#comment16 for explanation. */ tcpc_write(port, RT1715_REG_RT_INT, RT1715_REG_RT_INT_WAKEUP); tcpci_tcpc_alert(port); } const struct tcpm_drv rt1715_tcpm_drv = { .init = &rt1715_tcpci_tcpm_init, .release = &tcpci_tcpm_release, .get_cc = &rt1715_get_cc, #ifdef CONFIG_USB_PD_VBUS_DETECT_TCPC .check_vbus_level = &tcpci_tcpm_check_vbus_level, #endif .select_rp_value = &tcpci_tcpm_select_rp_value, .set_cc = &tcpci_tcpm_set_cc, .set_polarity = &rt1715_set_polarity, #ifdef CONFIG_USB_PD_DECODE_SOP .sop_prime_enable = &tcpci_tcpm_sop_prime_enable, #endif .set_vconn = &rt1715_set_vconn, .set_msg_header = &tcpci_tcpm_set_msg_header, .set_rx_enable = &tcpci_tcpm_set_rx_enable, .get_message_raw = &tcpci_tcpm_get_message_raw, .transmit = &tcpci_tcpm_transmit, .tcpc_alert = &rt1715_alert, #ifdef CONFIG_USB_PD_DISCHARGE_TCPC .tcpc_discharge_vbus = &tcpci_tcpc_discharge_vbus, #endif .tcpc_enable_auto_discharge_disconnect = &tcpci_tcpc_enable_auto_discharge_disconnect, #ifdef CONFIG_USB_PD_DUAL_ROLE_AUTO_TOGGLE .drp_toggle = &tcpci_tcpc_drp_toggle, #endif #ifdef CONFIG_USB_PD_PPC .set_snk_ctrl = &tcpci_tcpm_set_snk_ctrl, .set_src_ctrl = &tcpci_tcpm_set_src_ctrl, #endif .get_chip_info = &tcpci_get_chip_info, #ifdef CONFIG_USB_PD_TCPC_LOW_POWER .enter_low_power_mode = &rt1715_enter_low_power_mode, #endif .set_bist_test_mode = &tcpci_set_bist_test_mode, };