From: Badhri Jagan Sridharan <badhri@google.com>
To: Guenter Roeck <linux@roeck-us.net>,
Heikki Krogerus <heikki.krogerus@linux.intel.com>,
reg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org,
Badhri Jagan Sridharan <badhri@google.com>
Subject: [PATCH 2/3 v3] usb: typec: tcpci: Support BIST test data mode for compliance.
Date: Wed, 15 Jul 2020 20:41:27 -0700 [thread overview]
Message-ID: <20200716034128.1251728-2-badhri@google.com> (raw)
In-Reply-To: <20200716034128.1251728-1-badhri@google.com>
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>
---
Changes since V1:(Guenter's suggestions)
- Split the change into two: TCPM and TCPCI
- Move BIST log to TCPM log
- Alignment and column count changes
Changes since V2:(Guenter's suggestions)
- Re-ordered patchset
- Included Reviewed-by tag
---
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 753645bb25273a..f57d91fd0e0924 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 303ebde265465c..11c36d086c8608 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)
--
2.27.0.389.gc38d7665816-goog
next prev parent reply other threads:[~2020-07-16 3:41 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-07-16 3:41 [PATCH 1/3 v3] usb: typec: tcpm: Support bist test data mode for compliance Badhri Jagan Sridharan
2020-07-16 3:41 ` Badhri Jagan Sridharan [this message]
2020-07-16 3:41 ` [PATCH 3/3 v3] usb: typec: tcpm: Stay in BIST mode till hardreset or unattached Badhri Jagan Sridharan
2020-07-16 4:16 ` Guenter Roeck
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