diff options
Diffstat (limited to 'drivers/usb/typec/ucsi/ucsi.c')
| -rw-r--r-- | drivers/usb/typec/ucsi/ucsi.c | 92 |
1 files changed, 74 insertions, 18 deletions
diff --git a/drivers/usb/typec/ucsi/ucsi.c b/drivers/usb/typec/ucsi/ucsi.c index cf52cb34d285..bd6ae92aa39e 100644 --- a/drivers/usb/typec/ucsi/ucsi.c +++ b/drivers/usb/typec/ucsi/ucsi.c @@ -151,8 +151,12 @@ static int ucsi_exec_command(struct ucsi *ucsi, u64 cmd) if (!(cci & UCSI_CCI_COMMAND_COMPLETE)) return -EIO; - if (cci & UCSI_CCI_NOT_SUPPORTED) + if (cci & UCSI_CCI_NOT_SUPPORTED) { + if (ucsi_acknowledge_command(ucsi) < 0) + dev_err(ucsi->dev, + "ACK of unsupported command failed\n"); return -EOPNOTSUPP; + } if (cci & UCSI_CCI_ERROR) { if (cmd == UCSI_GET_ERROR_STATUS) @@ -1133,17 +1137,21 @@ static int ucsi_check_cable(struct ucsi_connector *con) if (ret < 0) return ret; - ret = ucsi_get_cable_identity(con); - if (ret < 0) - return ret; + if (con->ucsi->cap.features & UCSI_CAP_GET_PD_MESSAGE) { + ret = ucsi_get_cable_identity(con); + if (ret < 0) + return ret; + } - ret = ucsi_register_plug(con); - if (ret < 0) - return ret; + if (con->ucsi->cap.features & UCSI_CAP_ALT_MODE_DETAILS) { + ret = ucsi_register_plug(con); + if (ret < 0) + return ret; - ret = ucsi_register_altmodes(con, UCSI_RECIPIENT_SOP_P); - if (ret < 0) - return ret; + ret = ucsi_register_altmodes(con, UCSI_RECIPIENT_SOP_P); + if (ret < 0) + return ret; + } return 0; } @@ -1189,8 +1197,10 @@ static void ucsi_handle_connector_change(struct work_struct *work) ucsi_register_partner(con); ucsi_partner_task(con, ucsi_check_connection, 1, HZ); ucsi_partner_task(con, ucsi_check_connector_capability, 1, HZ); - ucsi_partner_task(con, ucsi_get_partner_identity, 1, HZ); - ucsi_partner_task(con, ucsi_check_cable, 1, HZ); + if (con->ucsi->cap.features & UCSI_CAP_GET_PD_MESSAGE) + ucsi_partner_task(con, ucsi_get_partner_identity, 1, HZ); + if (con->ucsi->cap.features & UCSI_CAP_CABLE_DETAILS) + ucsi_partner_task(con, ucsi_check_cable, 1, HZ); if (UCSI_CONSTAT_PWR_OPMODE(con->status.flags) == UCSI_CONSTAT_PWR_OPMODE_PD) @@ -1215,11 +1225,11 @@ static void ucsi_handle_connector_change(struct work_struct *work) if (con->status.change & UCSI_CONSTAT_CAM_CHANGE) ucsi_partner_task(con, ucsi_check_altmodes, 1, 0); - clear_bit(EVENT_PENDING, &con->ucsi->flags); - mutex_lock(&ucsi->ppm_lock); + clear_bit(EVENT_PENDING, &con->ucsi->flags); ret = ucsi_acknowledge_connector_change(ucsi); mutex_unlock(&ucsi->ppm_lock); + if (ret) dev_err(ucsi->dev, "%s: ACK failed (%d)", __func__, ret); @@ -1237,7 +1247,7 @@ void ucsi_connector_change(struct ucsi *ucsi, u8 num) struct ucsi_connector *con = &ucsi->connector[num - 1]; if (!(ucsi->ntfy & UCSI_ENABLE_NTFY_CONNECTOR_CHANGE)) { - dev_dbg(ucsi->dev, "Bogus connector change event\n"); + dev_dbg(ucsi->dev, "Early connector change event\n"); return; } @@ -1260,13 +1270,47 @@ static int ucsi_reset_connector(struct ucsi_connector *con, bool hard) static int ucsi_reset_ppm(struct ucsi *ucsi) { - u64 command = UCSI_PPM_RESET; + u64 command; unsigned long tmo; u32 cci; int ret; mutex_lock(&ucsi->ppm_lock); + ret = ucsi->ops->read(ucsi, UCSI_CCI, &cci, sizeof(cci)); + if (ret < 0) + goto out; + + /* + * If UCSI_CCI_RESET_COMPLETE is already set we must clear + * the flag before we start another reset. Send a + * UCSI_SET_NOTIFICATION_ENABLE command to achieve this. + * Ignore a timeout and try the reset anyway if this fails. + */ + if (cci & UCSI_CCI_RESET_COMPLETE) { + command = UCSI_SET_NOTIFICATION_ENABLE; + ret = ucsi->ops->async_write(ucsi, UCSI_CONTROL, &command, + sizeof(command)); + if (ret < 0) + goto out; + + tmo = jiffies + msecs_to_jiffies(UCSI_TIMEOUT_MS); + do { + ret = ucsi->ops->read(ucsi, UCSI_CCI, + &cci, sizeof(cci)); + if (ret < 0) + goto out; + if (cci & UCSI_CCI_COMMAND_COMPLETE) + break; + if (time_is_before_jiffies(tmo)) + break; + msleep(20); + } while (1); + + WARN_ON(cci & UCSI_CCI_RESET_COMPLETE); + } + + command = UCSI_PPM_RESET; ret = ucsi->ops->async_write(ucsi, UCSI_CONTROL, &command, sizeof(command)); if (ret < 0) @@ -1589,8 +1633,10 @@ static int ucsi_register_port(struct ucsi *ucsi, struct ucsi_connector *con) ucsi_register_partner(con); ucsi_pwr_opmode_change(con); ucsi_port_psy_changed(con); - ucsi_get_partner_identity(con); - ucsi_check_cable(con); + if (con->ucsi->cap.features & UCSI_CAP_GET_PD_MESSAGE) + ucsi_get_partner_identity(con); + if (con->ucsi->cap.features & UCSI_CAP_CABLE_DETAILS) + ucsi_check_cable(con); } /* Only notify USB controller if partner supports USB data */ @@ -1636,6 +1682,7 @@ static int ucsi_init(struct ucsi *ucsi) { struct ucsi_connector *con, *connector; u64 command, ntfy; + u32 cci; int ret; int i; @@ -1688,6 +1735,15 @@ static int ucsi_init(struct ucsi *ucsi) ucsi->connector = connector; ucsi->ntfy = ntfy; + + mutex_lock(&ucsi->ppm_lock); + ret = ucsi->ops->read(ucsi, UCSI_CCI, &cci, sizeof(cci)); + mutex_unlock(&ucsi->ppm_lock); + if (ret) + return ret; + if (UCSI_CCI_CONNECTOR(cci)) + ucsi_connector_change(ucsi, UCSI_CCI_CONNECTOR(cci)); + return 0; err_unregister: |