From: Badhri Jagan Sridharan <badhri@google.com>
To: Guenter Roeck <linux@roeck-us.net>,
Heikki Krogerus <heikki.krogerus@linux.intel.com>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org,
Badhri Jagan Sridharan <badhri@google.com>
Subject: [PATCH v6 10/14] usb: typec: tcpci: Implement callbacks for FRS
Date: Mon, 31 Aug 2020 19:59:23 -0700 [thread overview]
Message-ID: <20200901025927.3596190-11-badhri@google.com> (raw)
In-Reply-To: <20200901025927.3596190-1-badhri@google.com>
Implement tcpc.enable_frs to enable TCPC to receive
Fast role swap signal.
Additionally set the sink disconnect threshold to 4v
to prevent disconnect during Fast Role swap.
Signed-off-by: Badhri Jagan Sridharan <badhri@google.com>
---
Changes since v1:
- Changing patch version to v6 to fix version number confusion.
---
drivers/usb/typec/tcpm/tcpci.c | 17 +++++++++++++++++
drivers/usb/typec/tcpm/tcpci.h | 8 ++++++++
2 files changed, 25 insertions(+)
diff --git a/drivers/usb/typec/tcpm/tcpci.c b/drivers/usb/typec/tcpm/tcpci.c
index d6a6fac82d48..f9f0af64da5f 100644
--- a/drivers/usb/typec/tcpm/tcpci.c
+++ b/drivers/usb/typec/tcpm/tcpci.c
@@ -268,6 +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);
@@ -611,6 +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)
diff --git a/drivers/usb/typec/tcpm/tcpci.h b/drivers/usb/typec/tcpm/tcpci.h
index 82f021a82456..5ef07a56d67a 100644
--- a/drivers/usb/typec/tcpm/tcpci.h
+++ b/drivers/usb/typec/tcpm/tcpci.h
@@ -16,6 +16,7 @@
#define TCPC_PD_INT_REV 0xa
#define TCPC_ALERT 0x10
+#define TCPC_ALERT_EXTND BIT(14)
#define TCPC_ALERT_EXTENDED_STATUS BIT(13)
#define TCPC_ALERT_VBUS_DISCNCT BIT(11)
#define TCPC_ALERT_RX_BUF_OVF BIT(10)
@@ -37,6 +38,9 @@
#define TCPC_EXTENDED_STATUS_MASK 0x16
#define TCPC_EXTENDED_STATUS_MASK_VSAFE0V BIT(0)
+#define TCPC_ALERT_EXTENDED_MASK 0x17
+#define TCPC_SINK_FAST_ROLE_SWAP BIT(0)
+
#define TCPC_CONFIG_STD_OUTPUT 0x18
#define TCPC_TCPC_CTRL 0x19
@@ -63,6 +67,7 @@
#define TCPC_POWER_CTRL 0x1c
#define TCPC_POWER_CTRL_VCONN_ENABLE BIT(0)
+#define TCPC_FAST_ROLE_SWAP_EN BIT(7)
#define TCPC_CC_STATUS 0x1d
#define TCPC_CC_STATUS_TOGGLING BIT(5)
@@ -74,11 +79,14 @@
#define TCPC_POWER_STATUS 0x1e
#define TCPC_POWER_STATUS_UNINIT BIT(6)
+#define TCPC_POWER_STATUS_SOURCING_VBUS BIT(4)
#define TCPC_POWER_STATUS_VBUS_DET BIT(3)
#define TCPC_POWER_STATUS_VBUS_PRES BIT(2)
#define TCPC_FAULT_STATUS 0x1f
+#define TCPC_ALERT_EXTENDED 0x21
+
#define TCPC_COMMAND 0x23
#define TCPC_CMD_WAKE_I2C 0x11
#define TCPC_CMD_DISABLE_VBUS_DETECT 0x22
--
2.28.0.402.g5ffc5be6b7-goog
next prev parent reply other threads:[~2020-09-01 3:00 UTC|newest]
Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-09-01 2:59 [PATCH v6 00/14] TCPM support for FRS and AutoDischarge Disconnect Badhri Jagan Sridharan
2020-09-01 2:59 ` [PATCH v6 01/14] usb: typec: tcpci: Add register definitions to tcpci Badhri Jagan Sridharan
2020-09-15 12:10 ` Heikki Krogerus
2020-09-01 2:59 ` [PATCH v6 02/14] usb: typec: tcpci: Add support when hidden tx registers are inaccessible Badhri Jagan Sridharan
2020-09-15 12:11 ` Heikki Krogerus
2020-09-01 2:59 ` [PATCH v6 03/14] usb: typec: tcpci: update ROLE_CONTROL for DRP Badhri Jagan Sridharan
2020-09-15 12:12 ` Heikki Krogerus
2020-09-01 2:59 ` [PATCH v6 04/14] usb: typec: tcpci: Add a getter method to retrieve tcpm_port reference Badhri Jagan Sridharan
2020-09-15 12:16 ` Heikki Krogerus
2020-09-01 2:59 ` [PATCH v6 05/14] usb: typec: tcpci: Add set_vbus tcpci callback Badhri Jagan Sridharan
2020-09-15 12:22 ` Heikki Krogerus
2020-09-16 9:07 ` Badhri Jagan Sridharan
2020-09-01 2:59 ` [PATCH v6 06/14] dt-bindings: usb: Maxim type-c controller device tree binding document Badhri Jagan Sridharan
2020-09-01 2:59 ` [PATCH v6 07/14] usb: typec: tcpci_maxim: Chip level TCPC driver Badhri Jagan Sridharan
2020-09-15 12:43 ` Heikki Krogerus
2020-09-16 9:34 ` Badhri Jagan Sridharan
2020-09-01 2:59 ` [PATCH v6 08/14] dt-bindings: connector: Add property to set initial current cap for FRS Badhri Jagan Sridharan
2020-09-01 2:59 ` [PATCH v6 09/14] usb: typec: tcpm: Add support for Sink Fast Role SWAP(FRS) Badhri Jagan Sridharan
2020-09-15 13:20 ` Heikki Krogerus
2020-09-17 10:23 ` Badhri Jagan Sridharan
2020-09-01 2:59 ` Badhri Jagan Sridharan [this message]
2020-09-15 13:23 ` [PATCH v6 10/14] usb: typec: tcpci: Implement callbacks for FRS Heikki Krogerus
2020-09-01 2:59 ` [PATCH v6 11/14] usb: typec: tcpci_maxim: Add support for Sink FRS Badhri Jagan Sridharan
2020-09-15 13:25 ` Heikki Krogerus
2020-09-01 2:59 ` [PATCH v6 12/14] usb: typec: tcpm: Implement enabling Auto Discharge disconnect support Badhri Jagan Sridharan
2020-09-01 2:59 ` [PATCH v6 13/14] usb: typec: tcpci: Implement Auto discharge disconnect callbacks Badhri Jagan Sridharan
2020-09-01 2:59 ` [PATCH v6 14/14] usb: typec: tcpci_maxim: Implemnent set_auto_vbus_discharge_threshold Badhri Jagan Sridharan
2020-09-15 12:09 ` [PATCH v6 00/14] TCPM support for FRS and AutoDischarge Disconnect Heikki Krogerus
2020-09-15 16:57 ` Badhri Jagan Sridharan
2020-09-15 13:33 ` Heikki Krogerus
2020-09-15 16:59 ` Badhri Jagan Sridharan
2020-09-16 11:05 ` Greg Kroah-Hartman
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