From: Badhri Jagan Sridharan <badhri@google.com>
Date: Wed, 15 Jul 2020 20:41:27 -0700
Subject: usb: typec: tcpci: Support BIST test data mode for compliance.
Git-commit: c081ac42fefcf459fc546627ecb78d27235b23fe
Patch-mainline: v5.9-rc1
References: jsc#SLE-13918
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 <badhri@google.com>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Link: https://lore.kernel.org/r/20200716034128.1251728-2-badhri@google.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Acked-by: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
---
drivers/usb/typec/tcpm/tcpci.c | 9 +++++++++
drivers/usb/typec/tcpm/tcpci.h | 1 +
2 files changed, 10 insertions(+)
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)