diff options
Diffstat (limited to 'drivers/usb/typec/tcpm/tcpci.c')
| -rw-r--r-- | drivers/usb/typec/tcpm/tcpci.c | 113 |
1 files changed, 101 insertions, 12 deletions
diff --git a/drivers/usb/typec/tcpm/tcpci.c b/drivers/usb/typec/tcpm/tcpci.c index bd80e03b2b6f..f9f0af64da5f 100644 --- a/drivers/usb/typec/tcpm/tcpci.c +++ b/drivers/usb/typec/tcpm/tcpci.c @@ -38,6 +38,12 @@ struct tcpci_chip { struct tcpci_data data; }; +struct tcpm_port *tcpci_get_tcpm_port(struct tcpci *tcpci) +{ + return tcpci->port; +} +EXPORT_SYMBOL_GPL(tcpci_get_tcpm_port); + static inline struct tcpci *tcpc_to_tcpci(struct tcpc_dev *tcpc) { return container_of(tcpc, struct tcpci, tcpc); @@ -191,12 +197,47 @@ static int tcpci_set_polarity(struct tcpc_dev *tcpc, struct tcpci *tcpci = tcpc_to_tcpci(tcpc); unsigned int reg; int ret; + enum typec_cc_status cc1, cc2; - /* Keep the disconnect cc line open */ + /* Obtain Rp setting from role control */ ret = regmap_read(tcpci->regmap, TCPC_ROLE_CTRL, ®); if (ret < 0) return ret; + ret = tcpci_get_cc(tcpc, &cc1, &cc2); + if (ret < 0) + return ret; + + /* + * When port has drp toggling enabled, ROLE_CONTROL would only have the initial + * terminations for the toggling and does not indicate the final cc + * terminations when ConnectionResult is 0 i.e. drp toggling stops and + * the connection is resolbed. Infer port role from TCPC_CC_STATUS based on the + * terminations seen. The port role is then used to set the cc terminations. + */ + if (reg & TCPC_ROLE_CTRL_DRP) { + /* Disable DRP for the OPEN setting to take effect */ + reg = reg & ~TCPC_ROLE_CTRL_DRP; + + if (polarity == TYPEC_POLARITY_CC2) { + reg &= ~(TCPC_ROLE_CTRL_CC2_MASK << TCPC_ROLE_CTRL_CC2_SHIFT); + /* Local port is source */ + if (cc2 == TYPEC_CC_RD) + /* Role control would have the Rp setting when DRP was enabled */ + reg |= TCPC_ROLE_CTRL_CC_RP << TCPC_ROLE_CTRL_CC2_SHIFT; + else + reg |= TCPC_ROLE_CTRL_CC_RD << TCPC_ROLE_CTRL_CC2_SHIFT; + } else { + reg &= ~(TCPC_ROLE_CTRL_CC1_MASK << TCPC_ROLE_CTRL_CC1_SHIFT); + /* Local port is source */ + if (cc1 == TYPEC_CC_RD) + /* Role control would have the Rp setting when DRP was enabled */ + reg |= TCPC_ROLE_CTRL_CC_RP << TCPC_ROLE_CTRL_CC1_SHIFT; + else + reg |= TCPC_ROLE_CTRL_CC_RD << TCPC_ROLE_CTRL_CC1_SHIFT; + } + } + if (polarity == TYPEC_POLARITY_CC2) reg |= TCPC_ROLE_CTRL_CC_OPEN << TCPC_ROLE_CTRL_CC1_SHIFT; else @@ -227,6 +268,22 @@ static int tcpci_set_vconn(struct tcpc_dev *tcpc, bool enable) enable ? TCPC_POWER_CTRL_VCONN_ENABLE : 0); } +static int tcpci_enable_frs(struct tcpc_dev *dev, bool enable) +{ + struct tcpci *tcpci = tcpc_to_tcpci(dev); + int ret; + + /* To prevent disconnect during FRS, set disconnect threshold to 3.5V */ + ret = tcpci_write16(tcpci, TCPC_VBUS_SINK_DISCONNECT_THRESH, enable ? 0 : 0x8c); + if (ret < 0) + return ret; + + ret = regmap_update_bits(tcpci->regmap, TCPC_POWER_CTRL, TCPC_FAST_ROLE_SWAP_EN, enable ? + TCPC_FAST_ROLE_SWAP_EN : 0); + + return ret; +} + static int tcpci_set_bist_data(struct tcpc_dev *tcpc, bool enable) { struct tcpci *tcpci = tcpc_to_tcpci(tcpc); @@ -287,6 +344,13 @@ static int tcpci_set_vbus(struct tcpc_dev *tcpc, bool source, bool sink) struct tcpci *tcpci = tcpc_to_tcpci(tcpc); int ret; + if (tcpci->data->set_vbus) { + ret = tcpci->data->set_vbus(tcpci, tcpci->data, source, sink); + /* Bypass when ret > 0 */ + if (ret != 0) + return ret < 0 ? ret : 0; + } + /* Disable both source and sink first before enabling anything */ if (!source) { @@ -330,23 +394,47 @@ static int tcpci_pd_transmit(struct tcpc_dev *tcpc, int ret; cnt = msg ? pd_header_cnt(header) * 4 : 0; - ret = regmap_write(tcpci->regmap, TCPC_TX_BYTE_CNT, cnt + 2); - if (ret < 0) - return ret; + /** + * TCPCI spec forbids direct access of TCPC_TX_DATA. + * But, since some of the chipsets offer this capability, + * it's fair to support both. + */ + if (tcpci->data->TX_BUF_BYTE_x_hidden) { + u8 buf[TCPC_TRANSMIT_BUFFER_MAX_LEN] = {0,}; + u8 pos = 0; - ret = tcpci_write16(tcpci, TCPC_TX_HDR, header); - if (ret < 0) - return ret; + /* Payload + header + TCPC_TX_BYTE_CNT */ + buf[pos++] = cnt + 2; + + if (msg) + memcpy(&buf[pos], &msg->header, sizeof(msg->header)); - if (cnt > 0) { - ret = regmap_raw_write(tcpci->regmap, TCPC_TX_DATA, - &msg->payload, cnt); + pos += sizeof(header); + + if (cnt > 0) + memcpy(&buf[pos], msg->payload, cnt); + + pos += cnt; + ret = regmap_raw_write(tcpci->regmap, TCPC_TX_BYTE_CNT, buf, pos); + if (ret < 0) + return ret; + } else { + ret = regmap_write(tcpci->regmap, TCPC_TX_BYTE_CNT, cnt + 2); if (ret < 0) return ret; + + ret = tcpci_write16(tcpci, TCPC_TX_HDR, header); + if (ret < 0) + return ret; + + if (cnt > 0) { + ret = regmap_raw_write(tcpci->regmap, TCPC_TX_DATA, &msg->payload, cnt); + if (ret < 0) + return ret; + } } - reg = (PD_RETRY_COUNT << TCPC_TRANSMIT_RETRY_SHIFT) | - (type << TCPC_TRANSMIT_TYPE_SHIFT); + reg = (PD_RETRY_COUNT << TCPC_TRANSMIT_RETRY_SHIFT) | (type << TCPC_TRANSMIT_TYPE_SHIFT); ret = regmap_write(tcpci->regmap, TCPC_TRANSMIT, reg); if (ret < 0) return ret; @@ -539,6 +627,7 @@ struct tcpci *tcpci_register_port(struct device *dev, struct tcpci_data *data) tcpci->tcpc.set_roles = tcpci_set_roles; tcpci->tcpc.pd_transmit = tcpci_pd_transmit; tcpci->tcpc.set_bist_data = tcpci_set_bist_data; + tcpci->tcpc.enable_frs = tcpci_enable_frs; err = tcpci_parse_config(tcpci); if (err < 0) |