From c081ac42fefcf459fc546627ecb78d27235b23fe Mon Sep 17 00:00:00 2001 From: Badhri Jagan Sridharan Date: Wed, 15 Jul 2020 20:41:27 -0700 Subject: usb: typec: tcpci: Support BIST test data mode for compliance. Quoting from TCPCI spec: "Setting this bit to 1 is intended to be used only when a USB compliance tester is using USB BIST Test Data to test the PHY layer of the TCPC. The TCPM should clear this bit when a disconnect is detected. 0: Normal Operation. Incoming messages enabled by RECEIVE_DETECT passed to TCPM via Alert. 1: BIST Test Mode. Incoming messages enabled by RECEIVE_DETECT result in GoodCRC response but may not be passed to the TCPM via Alert." Signed-off-by: Badhri Jagan Sridharan Reviewed-by: Guenter Roeck Link: https://lore.kernel.org/r/20200716034128.1251728-2-badhri@google.com Signed-off-by: Greg Kroah-Hartman --- drivers/usb/typec/tcpm/tcpci.c | 9 +++++++++ drivers/usb/typec/tcpm/tcpci.h | 1 + 2 files changed, 10 insertions(+) (limited to 'drivers/usb/typec') diff --git a/drivers/usb/typec/tcpm/tcpci.c b/drivers/usb/typec/tcpm/tcpci.c index 753645bb2527..f57d91fd0e09 100644 --- a/drivers/usb/typec/tcpm/tcpci.c +++ b/drivers/usb/typec/tcpm/tcpci.c @@ -227,6 +227,14 @@ static int tcpci_set_vconn(struct tcpc_dev *tcpc, bool enable) enable ? TCPC_POWER_CTRL_VCONN_ENABLE : 0); } +static int tcpci_set_bist_data(struct tcpc_dev *tcpc, bool enable) +{ + struct tcpci *tcpci = tcpc_to_tcpci(tcpc); + + return regmap_update_bits(tcpci->regmap, TCPC_TCPC_CTRL, TCPC_TCPC_CTRL_BIST_TM, + enable ? TCPC_TCPC_CTRL_BIST_TM : 0); +} + static int tcpci_set_roles(struct tcpc_dev *tcpc, bool attached, enum typec_role role, enum typec_data_role data) { @@ -530,6 +538,7 @@ struct tcpci *tcpci_register_port(struct device *dev, struct tcpci_data *data) tcpci->tcpc.set_pd_rx = tcpci_set_pd_rx; tcpci->tcpc.set_roles = tcpci_set_roles; tcpci->tcpc.pd_transmit = tcpci_pd_transmit; + tcpci->tcpc.set_bist_data = tcpci_set_bist_data; err = tcpci_parse_config(tcpci); if (err < 0) diff --git a/drivers/usb/typec/tcpm/tcpci.h b/drivers/usb/typec/tcpm/tcpci.h index 303ebde26546..11c36d086c86 100644 --- a/drivers/usb/typec/tcpm/tcpci.h +++ b/drivers/usb/typec/tcpm/tcpci.h @@ -36,6 +36,7 @@ #define TCPC_TCPC_CTRL 0x19 #define TCPC_TCPC_CTRL_ORIENTATION BIT(0) +#define TCPC_TCPC_CTRL_BIST_TM BIT(1) #define TCPC_ROLE_CTRL 0x1a #define TCPC_ROLE_CTRL_DRP BIT(6) -- cgit v1.2.3