[PATCH 0/4] usb: typec: ucsi: Expand SOP/SOP' Discovery

[PATCH 0/4] usb: typec: ucsi: Expand SOP/SOP' Discovery

[Jameson Thies]

Hi Heikki,

This patch series expands support for partner and cable discover in the
UCSI driver. There are a few pieces here.

1. Some cleanup of the GET_CABLE_PROP definitions in ucsi.h.
2. Cable discovery and registration with the USB Type-C connector class.
3. Partner/Cable identity registration with the USB Type-C connector
class.
4. SOP' alternate mode registration with the USB-C connector class using
a cable plug.

These have been tested on a v6.6 kernel build running a usermode ppm
with a Realtek EVB. Let me know if you have any questions.

Thanks,
Jameson

Jameson Thies (4):
  usb: typec: ucsi: Clean up UCSI_CABLE_PROP macros
  usb: typec: ucsi: Register cables based on GET_CABLE_PROPERTY
  usb: typec: ucsi: Register SOP/SOP' Discover Identity Responses
  usb: typec: ucsi: Register SOP' alternate modes with cable plug

 drivers/usb/typec/ucsi/ucsi.c | 206 ++++++++++++++++++++++++++++++++++
 drivers/usb/typec/ucsi/ucsi.h |  40 ++++++-
 2 files changed, 244 insertions(+), 2 deletions(-)


base-commit: 3bf0514dc6f36f81ee11b1becd977cb87b4c90c6
-- 
2.44.0.rc0.258.g7320e95886-goog

[PATCH 1/4] usb: typec: ucsi: Clean up UCSI_CABLE_PROP macros

[Jameson Thies]

Clean up UCSI_CABLE_PROP macros by fixing a bitmask shifting error for
plug type and updating the modal support macro for consistent naming.

Fixes: 3cf657f07918 ("usb: typec: ucsi: Remove all bit-fields")
Signed-off-by: Jameson Thies <jthies@google.com>
---
Tested by building v6.6 kernel.

 drivers/usb/typec/ucsi/ucsi.h | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/usb/typec/ucsi/ucsi.h b/drivers/usb/typec/ucsi/ucsi.h
index 7e35ffbe0a6f..469a2baf472e 100644
--- a/drivers/usb/typec/ucsi/ucsi.h
+++ b/drivers/usb/typec/ucsi/ucsi.h
@@ -259,12 +259,12 @@ struct ucsi_cable_property {
 #define UCSI_CABLE_PROP_FLAG_VBUS_IN_CABLE	BIT(0)
 #define UCSI_CABLE_PROP_FLAG_ACTIVE_CABLE	BIT(1)
 #define UCSI_CABLE_PROP_FLAG_DIRECTIONALITY	BIT(2)
-#define UCSI_CABLE_PROP_FLAG_PLUG_TYPE(_f_)	((_f_) & GENMASK(3, 0))
+#define UCSI_CABLE_PROP_FLAG_PLUG_TYPE(_f_)	(((_f_) & GENMASK(4, 3)) >> 3)
 #define   UCSI_CABLE_PROPERTY_PLUG_TYPE_A	0
 #define   UCSI_CABLE_PROPERTY_PLUG_TYPE_B	1
 #define   UCSI_CABLE_PROPERTY_PLUG_TYPE_C	2
 #define   UCSI_CABLE_PROPERTY_PLUG_OTHER	3
-#define UCSI_CABLE_PROP_MODE_SUPPORT		BIT(5)
+#define UCSI_CABLE_PROP_FLAG_MODE_SUPPORT	BIT(5)
 	u8 latency;
 } __packed;
 
-- 
2.44.0.rc0.258.g7320e95886-goog

[PATCH 2/4] usb: typec: ucsi: Register cables based on GET_CABLE_PROPERTY

[Jameson Thies]

Register cables with the Type-C Connector Class in the UCSI driver based
on the PPM response to GET_CABLE_PROPERTY. Registered cable properties
include plug type, cable type and major revision.

Signed-off-by: Jameson Thies <jthies@google.com>
---
Tested on v6.6 kernel. Expected cable properties populate the USB Type-C
connector class sysfs paths:
redrix-rev3 /sys/class/typec # ls port2-cable
device  identity  plug_type  port2-plug0  power  subsystem  type  uevent
usb_power_delivery_revision

 drivers/usb/typec/ucsi/ucsi.c | 69 +++++++++++++++++++++++++++++++++++
 drivers/usb/typec/ucsi/ucsi.h |  5 +++
 2 files changed, 74 insertions(+)

diff --git a/drivers/usb/typec/ucsi/ucsi.c b/drivers/usb/typec/ucsi/ucsi.c
index ae105383e69e..15e82f5fab37 100644
--- a/drivers/usb/typec/ucsi/ucsi.c
+++ b/drivers/usb/typec/ucsi/ucsi.c
@@ -734,6 +734,50 @@ static void ucsi_unregister_partner_pdos(struct ucsi_connector *con)
 	con->partner_pd = NULL;
 }
 
+static int ucsi_register_cable(struct ucsi_connector *con)
+{
+	struct typec_cable *cable;
+	struct typec_cable_desc desc = {};
+
+	switch (UCSI_CABLE_PROP_FLAG_PLUG_TYPE(con->cable_prop.flags)) {
+	case UCSI_CABLE_PROPERTY_PLUG_TYPE_A:
+		desc.type = USB_PLUG_TYPE_A;
+		break;
+	case UCSI_CABLE_PROPERTY_PLUG_TYPE_B:
+		desc.type = USB_PLUG_TYPE_B;
+		break;
+	case UCSI_CABLE_PROPERTY_PLUG_TYPE_C:
+		desc.type = USB_PLUG_TYPE_C;
+		break;
+	default:
+		desc.type = USB_PLUG_NONE;
+		break;
+	}
+
+	desc.active = !!(UCSI_CABLE_PROP_FLAG_ACTIVE_CABLE & con->cable_prop.flags);
+	desc.pd_revision = UCSI_CABLE_PROP_FLAG_PD_MAJOR_REV_AS_BCD(con->cable_prop.flags);
+
+	cable = typec_register_cable(con->port, &desc);
+	if (IS_ERR(cable)) {
+		dev_err(con->ucsi->dev,
+			"con%d: failed to register cable (%ld)\n", con->num,
+			PTR_ERR(cable));
+		return PTR_ERR(cable);
+	}
+
+	con->cable = cable;
+	return 0;
+}
+
+static void ucsi_unregister_cable(struct ucsi_connector *con)
+{
+	if (!con->cable)
+		return;
+
+	typec_unregister_cable(con->cable);
+	con->cable = NULL;
+}
+
 static void ucsi_pwr_opmode_change(struct ucsi_connector *con)
 {
 	switch (UCSI_CONSTAT_PWR_OPMODE(con->status.flags)) {
@@ -807,6 +851,7 @@ static void ucsi_unregister_partner(struct ucsi_connector *con)
 	typec_partner_set_usb_power_delivery(con->partner, NULL);
 	ucsi_unregister_partner_pdos(con);
 	ucsi_unregister_altmodes(con, UCSI_RECIPIENT_SOP);
+	ucsi_unregister_cable(con);
 	typec_unregister_partner(con->partner);
 	con->partner = NULL;
 }
@@ -907,6 +952,28 @@ static int ucsi_check_connection(struct ucsi_connector *con)
 	return 0;
 }
 
+static int ucsi_check_cable(struct ucsi_connector *con)
+{
+	u64 command;
+	int ret;
+
+	if (con->cable)
+		return 0;
+
+	command = UCSI_GET_CABLE_PROPERTY | UCSI_CONNECTOR_NUMBER(con->num);
+	ret = ucsi_send_command(con->ucsi, command, &con->cable_prop, sizeof(con->cable_prop));
+	if (ret < 0) {
+		dev_err(con->ucsi->dev, "GET_CABLE_PROPERTY failed (%d)\n", ret);
+		return ret;
+	}
+
+	ret = ucsi_register_cable(con);
+	if (ret < 0)
+		return ret;
+
+	return 0;
+}
+
 static void ucsi_handle_connector_change(struct work_struct *work)
 {
 	struct ucsi_connector *con = container_of(work, struct ucsi_connector,
@@ -948,6 +1015,7 @@ 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_check_cable, 1, HZ);
 
 			if (UCSI_CONSTAT_PWR_OPMODE(con->status.flags) ==
 			    UCSI_CONSTAT_PWR_OPMODE_PD)
@@ -1346,6 +1414,7 @@ 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_check_cable(con);
 	}
 
 	/* Only notify USB controller if partner supports USB data */
diff --git a/drivers/usb/typec/ucsi/ucsi.h b/drivers/usb/typec/ucsi/ucsi.h
index 469a2baf472e..f0aabef0b7c6 100644
--- a/drivers/usb/typec/ucsi/ucsi.h
+++ b/drivers/usb/typec/ucsi/ucsi.h
@@ -265,6 +265,9 @@ struct ucsi_cable_property {
 #define   UCSI_CABLE_PROPERTY_PLUG_TYPE_C	2
 #define   UCSI_CABLE_PROPERTY_PLUG_OTHER	3
 #define UCSI_CABLE_PROP_FLAG_MODE_SUPPORT	BIT(5)
+#define UCSI_CABLE_PROP_FLAG_PD_MAJOR_REV(_f_)	(((_f_) & GENMASK(7, 6)) >> 6)
+#define UCSI_CABLE_PROP_FLAG_PD_MAJOR_REV_AS_BCD(_f_) \
+	UCSI_SPEC_REVISION_TO_BCD(UCSI_CABLE_PROP_FLAG_PD_MAJOR_REV(_f_))
 	u8 latency;
 } __packed;
 
@@ -400,6 +403,7 @@ struct ucsi_connector {
 
 	struct typec_port *port;
 	struct typec_partner *partner;
+	struct typec_cable *cable;
 
 	struct typec_altmode *port_altmode[UCSI_MAX_ALTMODES];
 	struct typec_altmode *partner_altmode[UCSI_MAX_ALTMODES];
@@ -408,6 +412,7 @@ struct ucsi_connector {
 
 	struct ucsi_connector_status status;
 	struct ucsi_connector_capability cap;
+	struct ucsi_cable_property cable_prop;
 	struct power_supply *psy;
 	struct power_supply_desc psy_desc;
 	u32 rdo;
-- 
2.44.0.rc0.258.g7320e95886-goog

[PATCH 3/4] usb: typec: ucsi: Register SOP/SOP' Discover Identity Responses

[Jameson Thies]

Register SOP and SOP' Discover Identity responses with the USB Type-C
Connector Class as partner and cable identities, respectively. Discover
Identity responses are requested from the PPM using the GET_PD_MESSAGE
UCSI command.

Signed-off-by: Jameson Thies <jthies@google.com>
---
Tested on v6.6 kernel. GET_PD_MESSAGE responses from the PPM populate
partner and cable identity in sysfs.
redrix-rev3 /sys/class/typec # ls port2-partner/identity/
cert_stat  id_header  product  product_type_vdo1  product_type_vdo2
product_type_vdo3
redrix-rev3 /sys/class/typec # ls port2-cable/identity/
cert_stat  id_header  product  product_type_vdo1  product_type_vdo2
product_type_vdo3

 drivers/usb/typec/ucsi/ucsi.c | 77 +++++++++++++++++++++++++++++++++++
 drivers/usb/typec/ucsi/ucsi.h | 29 +++++++++++++
 2 files changed, 106 insertions(+)

diff --git a/drivers/usb/typec/ucsi/ucsi.c b/drivers/usb/typec/ucsi/ucsi.c
index 15e82f5fab37..6d6443e61faa 100644
--- a/drivers/usb/typec/ucsi/ucsi.c
+++ b/drivers/usb/typec/ucsi/ucsi.c
@@ -646,6 +646,73 @@ static int ucsi_get_src_pdos(struct ucsi_connector *con)
 	return ret;
 }
 
+static int ucsi_read_identity(struct ucsi_connector *con, u8 recipient, struct usb_pd_identity *id)
+{
+	struct ucsi *ucsi = con->ucsi;
+	struct ucsi_pd_message_disc_id resp = {};
+	u64 command;
+	int ret;
+
+	/*
+	 * Skip identity discovery and registration if UCSI version is less than
+	 * v2.0. Before v2.0 MESSAGE_IN is 16 bytes which cannot fit a complete
+	 * 24 byte identity response.
+	 */
+	if (ucsi->version < UCSI_VERSION_2_0)
+		return -EPROTO;
+
+	command = UCSI_COMMAND(UCSI_GET_PD_MESSAGE) | UCSI_CONNECTOR_NUMBER(con->num);
+	command |= UCSI_GET_PD_MESSAGE_RECIPIENT(recipient);
+	/* VDM Header + 6 VDOs (0x1c bytes) without an offset */
+	command |= UCSI_GET_PD_MESSAGE_OFFSET(0);
+	command |= UCSI_GET_PD_MESSAGE_BYTES(0x1c);
+	command |= UCSI_GET_PD_MESSAGE_TYPE(UCSI_GET_PD_MESSAGE_TYPE_IDENTITY);
+
+	ret = ucsi_send_command(ucsi, command, &resp, sizeof(resp));
+	if (ret < 0) {
+		dev_err(ucsi->dev, "UCSI_GET_PD_MESSAGE failed (%d)\n", ret);
+		return ret;
+	}
+
+	id->id_header = resp.id_header;
+	id->cert_stat = resp.cert_stat;
+	id->product = resp.product;
+	id->vdo[0] = resp.vdo[0];
+	id->vdo[1] = resp.vdo[1];
+	id->vdo[2] = resp.vdo[2];
+	return 0;
+}
+
+static int ucsi_get_partner_identity(struct ucsi_connector *con)
+{
+	int ret;
+
+	ret = ucsi_read_identity(con, UCSI_RECIPIENT_SOP, &con->partner_identity);
+	if (ret < 0)
+		return ret;
+
+	ret = typec_partner_set_identity(con->partner);
+	if (ret < 0)
+		dev_err(con->ucsi->dev, "Failed to set partner identity (%d)\n", ret);
+
+	return ret;
+}
+
+static int ucsi_get_cable_identity(struct ucsi_connector *con)
+{
+	int ret;
+
+	ret = ucsi_read_identity(con, UCSI_RECIPIENT_SOP_P, &con->cable_identity);
+	if (ret < 0)
+		return ret;
+
+	ret = typec_cable_set_identity(con->cable);
+	if (ret < 0)
+		dev_err(con->ucsi->dev, "Failed to set cable identity (%d)\n", ret);
+
+	return ret;
+}
+
 static int ucsi_check_altmodes(struct ucsi_connector *con)
 {
 	int ret, num_partner_am;
@@ -754,6 +821,7 @@ static int ucsi_register_cable(struct ucsi_connector *con)
 		break;
 	}
 
+	desc.identity = &con->cable_identity;
 	desc.active = !!(UCSI_CABLE_PROP_FLAG_ACTIVE_CABLE & con->cable_prop.flags);
 	desc.pd_revision = UCSI_CABLE_PROP_FLAG_PD_MAJOR_REV_AS_BCD(con->cable_prop.flags);
 
@@ -776,6 +844,7 @@ static void ucsi_unregister_cable(struct ucsi_connector *con)
 
 	typec_unregister_cable(con->cable);
 	con->cable = NULL;
+	memset(&con->cable_identity, 0, sizeof(con->cable_identity));
 }
 
 static void ucsi_pwr_opmode_change(struct ucsi_connector *con)
@@ -825,6 +894,7 @@ static int ucsi_register_partner(struct ucsi_connector *con)
 		break;
 	}
 
+	desc.identity = &con->partner_identity;
 	desc.usb_pd = pwr_opmode == UCSI_CONSTAT_PWR_OPMODE_PD;
 	desc.pd_revision = UCSI_CONCAP_FLAG_PARTNER_PD_MAJOR_REV_AS_BCD(con->cap.flags);
 
@@ -854,6 +924,7 @@ static void ucsi_unregister_partner(struct ucsi_connector *con)
 	ucsi_unregister_cable(con);
 	typec_unregister_partner(con->partner);
 	con->partner = NULL;
+	memset(&con->partner_identity, 0, sizeof(con->partner_identity));
 }
 
 static void ucsi_partner_change(struct ucsi_connector *con)
@@ -971,6 +1042,10 @@ 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;
+
 	return 0;
 }
 
@@ -1015,6 +1090,7 @@ 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 (UCSI_CONSTAT_PWR_OPMODE(con->status.flags) ==
@@ -1414,6 +1490,7 @@ 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);
 	}
 
diff --git a/drivers/usb/typec/ucsi/ucsi.h b/drivers/usb/typec/ucsi/ucsi.h
index f0aabef0b7c6..b89fae82e8ce 100644
--- a/drivers/usb/typec/ucsi/ucsi.h
+++ b/drivers/usb/typec/ucsi/ucsi.h
@@ -106,6 +106,7 @@ void ucsi_connector_change(struct ucsi *ucsi, u8 num);
 #define UCSI_GET_CABLE_PROPERTY		0x11
 #define UCSI_GET_CONNECTOR_STATUS	0x12
 #define UCSI_GET_ERROR_STATUS		0x13
+#define UCSI_GET_PD_MESSAGE		0x15
 
 #define UCSI_CONNECTOR_NUMBER(_num_)		((u64)(_num_) << 16)
 #define UCSI_COMMAND(_cmd_)			((_cmd_) & 0xff)
@@ -159,6 +160,18 @@ void ucsi_connector_change(struct ucsi *ucsi, u8 num);
 #define UCSI_MAX_PDOS				(4)
 #define UCSI_GET_PDOS_SRC_PDOS			((u64)1 << 34)
 
+/* GET_PD_MESSAGE command bits */
+#define UCSI_GET_PD_MESSAGE_RECIPIENT(_r_)	((u64)(_r_) << 23)
+#define UCSI_GET_PD_MESSAGE_OFFSET(_r_)		((u64)(_r_) << 26)
+#define UCSI_GET_PD_MESSAGE_BYTES(_r_)		((u64)(_r_) << 34)
+#define UCSI_GET_PD_MESSAGE_TYPE(_r_)		((u64)(_r_) << 42)
+#define   UCSI_GET_PD_MESSAGE_TYPE_SNK_CAP_EXT	0
+#define   UCSI_GET_PD_MESSAGE_TYPE_SRC_CAP_EXT	1
+#define   UCSI_GET_PD_MESSAGE_TYPE_BAT_CAP	2
+#define   UCSI_GET_PD_MESSAGE_TYPE_BAT_STAT	3
+#define   UCSI_GET_PD_MESSAGE_TYPE_IDENTITY	4
+#define   UCSI_GET_PD_MESSAGE_TYPE_REVISION	5
+
 /* -------------------------------------------------------------------------- */
 
 /* Error information returned by PPM in response to GET_ERROR_STATUS command. */
@@ -338,6 +351,18 @@ struct ucsi_connector_status {
 	((get_unaligned_le32(&(_p_)[5]) & GENMASK(16, 1)) >> 1)
 } __packed;
 
+/*
+ * Data structure filled by PPM in response to GET_PD_MESSAGE command with the
+ * Response Message Type set to Discover Identity Response.
+ */
+struct ucsi_pd_message_disc_id {
+	u32 vdm_header;
+	u32 id_header;
+	u32 cert_stat;
+	u32 product;
+	u32 vdo[3];
+} __packed;
+
 /* -------------------------------------------------------------------------- */
 
 struct ucsi_debugfs_entry {
@@ -428,6 +453,10 @@ struct ucsi_connector {
 	struct usb_power_delivery_capabilities *partner_sink_caps;
 
 	struct usb_role_switch *usb_role_sw;
+
+	/* USB PD identity */
+	struct usb_pd_identity partner_identity;
+	struct usb_pd_identity cable_identity;
 };
 
 int ucsi_send_command(struct ucsi *ucsi, u64 command,
-- 
2.44.0.rc0.258.g7320e95886-goog

[PATCH 4/4] usb: typec: ucsi: Register SOP' alternate modes with cable plug

[Jameson Thies]

Register SOP' alternate modes with a Type-C Connector Class cable plug.
Alternate modes are queried from the PPM using the GET_ALTERNATE_MODES
command with recipient set to SOP'.

Signed-off-by: Jameson Thies <jthies@google.com>
---
Tested on v6.6 kernel. SOP' GET_ALTERNATE_MODE responses from the PPM
are correctly registered as to the cable plug.
redrix-rev3 /sys/class/typec # ls port2-cable/port2-plug0/
device  port2-plug0.0  port2-plug0.1  power  subsystem  uevent

 drivers/usb/typec/ucsi/ucsi.c | 60 +++++++++++++++++++++++++++++++++++
 drivers/usb/typec/ucsi/ucsi.h |  2 ++
 2 files changed, 62 insertions(+)

diff --git a/drivers/usb/typec/ucsi/ucsi.c b/drivers/usb/typec/ucsi/ucsi.c
index 6d6443e61faa..9b541547917b 100644
--- a/drivers/usb/typec/ucsi/ucsi.c
+++ b/drivers/usb/typec/ucsi/ucsi.c
@@ -399,6 +399,27 @@ static int ucsi_register_altmode(struct ucsi_connector *con,
 
 		con->partner_altmode[i] = alt;
 		break;
+	case UCSI_RECIPIENT_SOP_P:
+		i = ucsi_next_altmode(con->plug_altmode);
+		if (i < 0) {
+			ret = i;
+			goto err;
+		}
+
+		ret = ucsi_altmode_next_mode(con->plug_altmode, desc->svid);
+		if (ret < 0)
+			return ret;
+
+		desc->mode = ret;
+
+		alt = typec_plug_register_altmode(con->plug, desc);
+		if (IS_ERR(alt)) {
+			ret = PTR_ERR(alt);
+			goto err;
+		}
+
+		con->plug_altmode[i] = alt;
+		break;
 	default:
 		return -EINVAL;
 	}
@@ -566,6 +587,9 @@ static void ucsi_unregister_altmodes(struct ucsi_connector *con, u8 recipient)
 	case UCSI_RECIPIENT_SOP:
 		adev = con->partner_altmode;
 		break;
+	case UCSI_RECIPIENT_SOP_P:
+		adev = con->plug_altmode;
+		break;
 	default:
 		return;
 	}
@@ -801,6 +825,33 @@ static void ucsi_unregister_partner_pdos(struct ucsi_connector *con)
 	con->partner_pd = NULL;
 }
 
+static int ucsi_register_plug(struct ucsi_connector *con)
+{
+	struct typec_plug *plug;
+	struct typec_plug_desc desc = {.index = TYPEC_PLUG_SOP_P};
+
+	plug = typec_register_plug(con->cable, &desc);
+	if (IS_ERR(plug)) {
+		dev_err(con->ucsi->dev,
+			"con%d: failed to register plug (%ld)\n", con->num,
+			PTR_ERR(plug));
+		return PTR_ERR(plug);
+	}
+
+	con->plug = plug;
+	return 0;
+}
+
+static void ucsi_unregister_plug(struct ucsi_connector *con)
+{
+	if (!con->plug)
+		return;
+
+	ucsi_unregister_altmodes(con, UCSI_RECIPIENT_SOP_P);
+	typec_unregister_plug(con->plug);
+	con->plug = NULL;
+}
+
 static int ucsi_register_cable(struct ucsi_connector *con)
 {
 	struct typec_cable *cable;
@@ -842,6 +893,7 @@ static void ucsi_unregister_cable(struct ucsi_connector *con)
 	if (!con->cable)
 		return;
 
+	ucsi_unregister_plug(con);
 	typec_unregister_cable(con->cable);
 	con->cable = NULL;
 	memset(&con->cable_identity, 0, sizeof(con->cable_identity));
@@ -1046,6 +1098,14 @@ static int ucsi_check_cable(struct ucsi_connector *con)
 	if (ret < 0)
 		return ret;
 
+	ret = ucsi_register_plug(con);
+	if (ret < 0)
+		return ret;
+
+	ret = ucsi_register_altmodes(con, UCSI_RECIPIENT_SOP_P);
+	if (ret < 0)
+		return ret;
+
 	return 0;
 }
 
diff --git a/drivers/usb/typec/ucsi/ucsi.h b/drivers/usb/typec/ucsi/ucsi.h
index b89fae82e8ce..32daf5f58650 100644
--- a/drivers/usb/typec/ucsi/ucsi.h
+++ b/drivers/usb/typec/ucsi/ucsi.h
@@ -429,9 +429,11 @@ struct ucsi_connector {
 	struct typec_port *port;
 	struct typec_partner *partner;
 	struct typec_cable *cable;
+	struct typec_plug *plug;
 
 	struct typec_altmode *port_altmode[UCSI_MAX_ALTMODES];
 	struct typec_altmode *partner_altmode[UCSI_MAX_ALTMODES];
+	struct typec_altmode *plug_altmode[UCSI_MAX_ALTMODES];
 
 	struct typec_capability typec_cap;
 
-- 
2.44.0.rc0.258.g7320e95886-goog

Re: [PATCH 1/4] usb: typec: ucsi: Clean up UCSI_CABLE_PROP macros

[Benson Leung]

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Hi Jameson,

On Fri, Feb 23, 2024 at 01:03:25AM +0000, Jameson Thies wrote:
> Clean up UCSI_CABLE_PROP macros by fixing a bitmask shifting error for
> plug type and updating the modal support macro for consistent naming.
> 
> Fixes: 3cf657f07918 ("usb: typec: ucsi: Remove all bit-fields")
> Signed-off-by: Jameson Thies <jthies@google.com>

Reviewed-by: Benson Leung <bleung@chromium.org>

> ---
> Tested by building v6.6 kernel.
> 
>  drivers/usb/typec/ucsi/ucsi.h | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/usb/typec/ucsi/ucsi.h b/drivers/usb/typec/ucsi/ucsi.h
> index 7e35ffbe0a6f..469a2baf472e 100644
> --- a/drivers/usb/typec/ucsi/ucsi.h
> +++ b/drivers/usb/typec/ucsi/ucsi.h
> @@ -259,12 +259,12 @@ struct ucsi_cable_property {
>  #define UCSI_CABLE_PROP_FLAG_VBUS_IN_CABLE	BIT(0)
>  #define UCSI_CABLE_PROP_FLAG_ACTIVE_CABLE	BIT(1)
>  #define UCSI_CABLE_PROP_FLAG_DIRECTIONALITY	BIT(2)
> -#define UCSI_CABLE_PROP_FLAG_PLUG_TYPE(_f_)	((_f_) & GENMASK(3, 0))
> +#define UCSI_CABLE_PROP_FLAG_PLUG_TYPE(_f_)	(((_f_) & GENMASK(4, 3)) >> 3)
>  #define   UCSI_CABLE_PROPERTY_PLUG_TYPE_A	0
>  #define   UCSI_CABLE_PROPERTY_PLUG_TYPE_B	1
>  #define   UCSI_CABLE_PROPERTY_PLUG_TYPE_C	2
>  #define   UCSI_CABLE_PROPERTY_PLUG_OTHER	3
> -#define UCSI_CABLE_PROP_MODE_SUPPORT		BIT(5)
> +#define UCSI_CABLE_PROP_FLAG_MODE_SUPPORT	BIT(5)
>  	u8 latency;
>  } __packed;
>  
> -- 
> 2.44.0.rc0.258.g7320e95886-goog
> 

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Re: [PATCH 2/4] usb: typec: ucsi: Register cables based on GET_CABLE_PROPERTY

[Benson Leung]

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Hi Jameson,

On Fri, Feb 23, 2024 at 01:03:26AM +0000, Jameson Thies wrote:
> Register cables with the Type-C Connector Class in the UCSI driver based
> on the PPM response to GET_CABLE_PROPERTY. Registered cable properties
> include plug type, cable type and major revision.
> 
> Signed-off-by: Jameson Thies <jthies@google.com>

Reviewed-by: Benson Leung <bleung@chromium.org>

> ---
> Tested on v6.6 kernel. Expected cable properties populate the USB Type-C
> connector class sysfs paths:
> redrix-rev3 /sys/class/typec # ls port2-cable
> device  identity  plug_type  port2-plug0  power  subsystem  type  uevent
> usb_power_delivery_revision
> 
>  drivers/usb/typec/ucsi/ucsi.c | 69 +++++++++++++++++++++++++++++++++++
>  drivers/usb/typec/ucsi/ucsi.h |  5 +++
>  2 files changed, 74 insertions(+)
> 
> diff --git a/drivers/usb/typec/ucsi/ucsi.c b/drivers/usb/typec/ucsi/ucsi.c
> index ae105383e69e..15e82f5fab37 100644
> --- a/drivers/usb/typec/ucsi/ucsi.c
> +++ b/drivers/usb/typec/ucsi/ucsi.c
> @@ -734,6 +734,50 @@ static void ucsi_unregister_partner_pdos(struct ucsi_connector *con)
>  	con->partner_pd = NULL;
>  }
>  
> +static int ucsi_register_cable(struct ucsi_connector *con)
> +{
> +	struct typec_cable *cable;
> +	struct typec_cable_desc desc = {};
> +
> +	switch (UCSI_CABLE_PROP_FLAG_PLUG_TYPE(con->cable_prop.flags)) {
> +	case UCSI_CABLE_PROPERTY_PLUG_TYPE_A:
> +		desc.type = USB_PLUG_TYPE_A;
> +		break;
> +	case UCSI_CABLE_PROPERTY_PLUG_TYPE_B:
> +		desc.type = USB_PLUG_TYPE_B;
> +		break;
> +	case UCSI_CABLE_PROPERTY_PLUG_TYPE_C:
> +		desc.type = USB_PLUG_TYPE_C;
> +		break;
> +	default:
> +		desc.type = USB_PLUG_NONE;
> +		break;
> +	}
> +
> +	desc.active = !!(UCSI_CABLE_PROP_FLAG_ACTIVE_CABLE & con->cable_prop.flags);
> +	desc.pd_revision = UCSI_CABLE_PROP_FLAG_PD_MAJOR_REV_AS_BCD(con->cable_prop.flags);
> +
> +	cable = typec_register_cable(con->port, &desc);
> +	if (IS_ERR(cable)) {
> +		dev_err(con->ucsi->dev,
> +			"con%d: failed to register cable (%ld)\n", con->num,
> +			PTR_ERR(cable));
> +		return PTR_ERR(cable);
> +	}
> +
> +	con->cable = cable;
> +	return 0;
> +}
> +
> +static void ucsi_unregister_cable(struct ucsi_connector *con)
> +{
> +	if (!con->cable)
> +		return;
> +
> +	typec_unregister_cable(con->cable);
> +	con->cable = NULL;
> +}
> +
>  static void ucsi_pwr_opmode_change(struct ucsi_connector *con)
>  {
>  	switch (UCSI_CONSTAT_PWR_OPMODE(con->status.flags)) {
> @@ -807,6 +851,7 @@ static void ucsi_unregister_partner(struct ucsi_connector *con)
>  	typec_partner_set_usb_power_delivery(con->partner, NULL);
>  	ucsi_unregister_partner_pdos(con);
>  	ucsi_unregister_altmodes(con, UCSI_RECIPIENT_SOP);
> +	ucsi_unregister_cable(con);
>  	typec_unregister_partner(con->partner);
>  	con->partner = NULL;
>  }
> @@ -907,6 +952,28 @@ static int ucsi_check_connection(struct ucsi_connector *con)
>  	return 0;
>  }
>  
> +static int ucsi_check_cable(struct ucsi_connector *con)
> +{
> +	u64 command;
> +	int ret;
> +
> +	if (con->cable)
> +		return 0;
> +
> +	command = UCSI_GET_CABLE_PROPERTY | UCSI_CONNECTOR_NUMBER(con->num);
> +	ret = ucsi_send_command(con->ucsi, command, &con->cable_prop, sizeof(con->cable_prop));
> +	if (ret < 0) {
> +		dev_err(con->ucsi->dev, "GET_CABLE_PROPERTY failed (%d)\n", ret);
> +		return ret;
> +	}
> +
> +	ret = ucsi_register_cable(con);
> +	if (ret < 0)
> +		return ret;
> +
> +	return 0;
> +}
> +
>  static void ucsi_handle_connector_change(struct work_struct *work)
>  {
>  	struct ucsi_connector *con = container_of(work, struct ucsi_connector,
> @@ -948,6 +1015,7 @@ 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_check_cable, 1, HZ);
>  
>  			if (UCSI_CONSTAT_PWR_OPMODE(con->status.flags) ==
>  			    UCSI_CONSTAT_PWR_OPMODE_PD)
> @@ -1346,6 +1414,7 @@ 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_check_cable(con);
>  	}
>  
>  	/* Only notify USB controller if partner supports USB data */
> diff --git a/drivers/usb/typec/ucsi/ucsi.h b/drivers/usb/typec/ucsi/ucsi.h
> index 469a2baf472e..f0aabef0b7c6 100644
> --- a/drivers/usb/typec/ucsi/ucsi.h
> +++ b/drivers/usb/typec/ucsi/ucsi.h
> @@ -265,6 +265,9 @@ struct ucsi_cable_property {
>  #define   UCSI_CABLE_PROPERTY_PLUG_TYPE_C	2
>  #define   UCSI_CABLE_PROPERTY_PLUG_OTHER	3
>  #define UCSI_CABLE_PROP_FLAG_MODE_SUPPORT	BIT(5)
> +#define UCSI_CABLE_PROP_FLAG_PD_MAJOR_REV(_f_)	(((_f_) & GENMASK(7, 6)) >> 6)
> +#define UCSI_CABLE_PROP_FLAG_PD_MAJOR_REV_AS_BCD(_f_) \
> +	UCSI_SPEC_REVISION_TO_BCD(UCSI_CABLE_PROP_FLAG_PD_MAJOR_REV(_f_))
>  	u8 latency;
>  } __packed;
>  
> @@ -400,6 +403,7 @@ struct ucsi_connector {
>  
>  	struct typec_port *port;
>  	struct typec_partner *partner;
> +	struct typec_cable *cable;
>  
>  	struct typec_altmode *port_altmode[UCSI_MAX_ALTMODES];
>  	struct typec_altmode *partner_altmode[UCSI_MAX_ALTMODES];
> @@ -408,6 +412,7 @@ struct ucsi_connector {
>  
>  	struct ucsi_connector_status status;
>  	struct ucsi_connector_capability cap;
> +	struct ucsi_cable_property cable_prop;
>  	struct power_supply *psy;
>  	struct power_supply_desc psy_desc;
>  	u32 rdo;
> -- 
> 2.44.0.rc0.258.g7320e95886-goog
> 

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Re: [PATCH 3/4] usb: typec: ucsi: Register SOP/SOP' Discover Identity Responses

[Benson Leung]

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Hi Jameson,

On Fri, Feb 23, 2024 at 01:03:27AM +0000, Jameson Thies wrote:
> Register SOP and SOP' Discover Identity responses with the USB Type-C
> Connector Class as partner and cable identities, respectively. Discover
> Identity responses are requested from the PPM using the GET_PD_MESSAGE
> UCSI command.
> 
> Signed-off-by: Jameson Thies <jthies@google.com>

Reviewed-by: Benson Leung <bleung@chromium.org>

> ---
> Tested on v6.6 kernel. GET_PD_MESSAGE responses from the PPM populate
> partner and cable identity in sysfs.
> redrix-rev3 /sys/class/typec # ls port2-partner/identity/
> cert_stat  id_header  product  product_type_vdo1  product_type_vdo2
> product_type_vdo3
> redrix-rev3 /sys/class/typec # ls port2-cable/identity/
> cert_stat  id_header  product  product_type_vdo1  product_type_vdo2
> product_type_vdo3
> 
>  drivers/usb/typec/ucsi/ucsi.c | 77 +++++++++++++++++++++++++++++++++++
>  drivers/usb/typec/ucsi/ucsi.h | 29 +++++++++++++
>  2 files changed, 106 insertions(+)
> 
> diff --git a/drivers/usb/typec/ucsi/ucsi.c b/drivers/usb/typec/ucsi/ucsi.c
> index 15e82f5fab37..6d6443e61faa 100644
> --- a/drivers/usb/typec/ucsi/ucsi.c
> +++ b/drivers/usb/typec/ucsi/ucsi.c
> @@ -646,6 +646,73 @@ static int ucsi_get_src_pdos(struct ucsi_connector *con)
>  	return ret;
>  }
>  
> +static int ucsi_read_identity(struct ucsi_connector *con, u8 recipient, struct usb_pd_identity *id)
> +{
> +	struct ucsi *ucsi = con->ucsi;
> +	struct ucsi_pd_message_disc_id resp = {};
> +	u64 command;
> +	int ret;
> +
> +	/*
> +	 * Skip identity discovery and registration if UCSI version is less than
> +	 * v2.0. Before v2.0 MESSAGE_IN is 16 bytes which cannot fit a complete
> +	 * 24 byte identity response.
> +	 */
> +	if (ucsi->version < UCSI_VERSION_2_0)
> +		return -EPROTO;
> +
> +	command = UCSI_COMMAND(UCSI_GET_PD_MESSAGE) | UCSI_CONNECTOR_NUMBER(con->num);
> +	command |= UCSI_GET_PD_MESSAGE_RECIPIENT(recipient);
> +	/* VDM Header + 6 VDOs (0x1c bytes) without an offset */
> +	command |= UCSI_GET_PD_MESSAGE_OFFSET(0);
> +	command |= UCSI_GET_PD_MESSAGE_BYTES(0x1c);
> +	command |= UCSI_GET_PD_MESSAGE_TYPE(UCSI_GET_PD_MESSAGE_TYPE_IDENTITY);
> +
> +	ret = ucsi_send_command(ucsi, command, &resp, sizeof(resp));
> +	if (ret < 0) {
> +		dev_err(ucsi->dev, "UCSI_GET_PD_MESSAGE failed (%d)\n", ret);
> +		return ret;
> +	}
> +
> +	id->id_header = resp.id_header;
> +	id->cert_stat = resp.cert_stat;
> +	id->product = resp.product;
> +	id->vdo[0] = resp.vdo[0];
> +	id->vdo[1] = resp.vdo[1];
> +	id->vdo[2] = resp.vdo[2];
> +	return 0;
> +}
> +
> +static int ucsi_get_partner_identity(struct ucsi_connector *con)
> +{
> +	int ret;
> +
> +	ret = ucsi_read_identity(con, UCSI_RECIPIENT_SOP, &con->partner_identity);
> +	if (ret < 0)
> +		return ret;
> +
> +	ret = typec_partner_set_identity(con->partner);
> +	if (ret < 0)
> +		dev_err(con->ucsi->dev, "Failed to set partner identity (%d)\n", ret);
> +
> +	return ret;
> +}
> +
> +static int ucsi_get_cable_identity(struct ucsi_connector *con)
> +{
> +	int ret;
> +
> +	ret = ucsi_read_identity(con, UCSI_RECIPIENT_SOP_P, &con->cable_identity);
> +	if (ret < 0)
> +		return ret;
> +
> +	ret = typec_cable_set_identity(con->cable);
> +	if (ret < 0)
> +		dev_err(con->ucsi->dev, "Failed to set cable identity (%d)\n", ret);
> +
> +	return ret;
> +}
> +
>  static int ucsi_check_altmodes(struct ucsi_connector *con)
>  {
>  	int ret, num_partner_am;
> @@ -754,6 +821,7 @@ static int ucsi_register_cable(struct ucsi_connector *con)
>  		break;
>  	}
>  
> +	desc.identity = &con->cable_identity;
>  	desc.active = !!(UCSI_CABLE_PROP_FLAG_ACTIVE_CABLE & con->cable_prop.flags);
>  	desc.pd_revision = UCSI_CABLE_PROP_FLAG_PD_MAJOR_REV_AS_BCD(con->cable_prop.flags);
>  
> @@ -776,6 +844,7 @@ static void ucsi_unregister_cable(struct ucsi_connector *con)
>  
>  	typec_unregister_cable(con->cable);
>  	con->cable = NULL;
> +	memset(&con->cable_identity, 0, sizeof(con->cable_identity));
>  }
>  
>  static void ucsi_pwr_opmode_change(struct ucsi_connector *con)
> @@ -825,6 +894,7 @@ static int ucsi_register_partner(struct ucsi_connector *con)
>  		break;
>  	}
>  
> +	desc.identity = &con->partner_identity;
>  	desc.usb_pd = pwr_opmode == UCSI_CONSTAT_PWR_OPMODE_PD;
>  	desc.pd_revision = UCSI_CONCAP_FLAG_PARTNER_PD_MAJOR_REV_AS_BCD(con->cap.flags);
>  
> @@ -854,6 +924,7 @@ static void ucsi_unregister_partner(struct ucsi_connector *con)
>  	ucsi_unregister_cable(con);
>  	typec_unregister_partner(con->partner);
>  	con->partner = NULL;
> +	memset(&con->partner_identity, 0, sizeof(con->partner_identity));
>  }
>  
>  static void ucsi_partner_change(struct ucsi_connector *con)
> @@ -971,6 +1042,10 @@ 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;
> +
>  	return 0;
>  }
>  
> @@ -1015,6 +1090,7 @@ 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 (UCSI_CONSTAT_PWR_OPMODE(con->status.flags) ==
> @@ -1414,6 +1490,7 @@ 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);
>  	}
>  
> diff --git a/drivers/usb/typec/ucsi/ucsi.h b/drivers/usb/typec/ucsi/ucsi.h
> index f0aabef0b7c6..b89fae82e8ce 100644
> --- a/drivers/usb/typec/ucsi/ucsi.h
> +++ b/drivers/usb/typec/ucsi/ucsi.h
> @@ -106,6 +106,7 @@ void ucsi_connector_change(struct ucsi *ucsi, u8 num);
>  #define UCSI_GET_CABLE_PROPERTY		0x11
>  #define UCSI_GET_CONNECTOR_STATUS	0x12
>  #define UCSI_GET_ERROR_STATUS		0x13
> +#define UCSI_GET_PD_MESSAGE		0x15
>  
>  #define UCSI_CONNECTOR_NUMBER(_num_)		((u64)(_num_) << 16)
>  #define UCSI_COMMAND(_cmd_)			((_cmd_) & 0xff)
> @@ -159,6 +160,18 @@ void ucsi_connector_change(struct ucsi *ucsi, u8 num);
>  #define UCSI_MAX_PDOS				(4)
>  #define UCSI_GET_PDOS_SRC_PDOS			((u64)1 << 34)
>  
> +/* GET_PD_MESSAGE command bits */
> +#define UCSI_GET_PD_MESSAGE_RECIPIENT(_r_)	((u64)(_r_) << 23)
> +#define UCSI_GET_PD_MESSAGE_OFFSET(_r_)		((u64)(_r_) << 26)
> +#define UCSI_GET_PD_MESSAGE_BYTES(_r_)		((u64)(_r_) << 34)
> +#define UCSI_GET_PD_MESSAGE_TYPE(_r_)		((u64)(_r_) << 42)
> +#define   UCSI_GET_PD_MESSAGE_TYPE_SNK_CAP_EXT	0
> +#define   UCSI_GET_PD_MESSAGE_TYPE_SRC_CAP_EXT	1
> +#define   UCSI_GET_PD_MESSAGE_TYPE_BAT_CAP	2
> +#define   UCSI_GET_PD_MESSAGE_TYPE_BAT_STAT	3
> +#define   UCSI_GET_PD_MESSAGE_TYPE_IDENTITY	4
> +#define   UCSI_GET_PD_MESSAGE_TYPE_REVISION	5
> +
>  /* -------------------------------------------------------------------------- */
>  
>  /* Error information returned by PPM in response to GET_ERROR_STATUS command. */
> @@ -338,6 +351,18 @@ struct ucsi_connector_status {
>  	((get_unaligned_le32(&(_p_)[5]) & GENMASK(16, 1)) >> 1)
>  } __packed;
>  
> +/*
> + * Data structure filled by PPM in response to GET_PD_MESSAGE command with the
> + * Response Message Type set to Discover Identity Response.
> + */
> +struct ucsi_pd_message_disc_id {
> +	u32 vdm_header;
> +	u32 id_header;
> +	u32 cert_stat;
> +	u32 product;
> +	u32 vdo[3];
> +} __packed;
> +
>  /* -------------------------------------------------------------------------- */
>  
>  struct ucsi_debugfs_entry {
> @@ -428,6 +453,10 @@ struct ucsi_connector {
>  	struct usb_power_delivery_capabilities *partner_sink_caps;
>  
>  	struct usb_role_switch *usb_role_sw;
> +
> +	/* USB PD identity */
> +	struct usb_pd_identity partner_identity;
> +	struct usb_pd_identity cable_identity;
>  };
>  
>  int ucsi_send_command(struct ucsi *ucsi, u64 command,
> -- 
> 2.44.0.rc0.258.g7320e95886-goog
> 

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Re: [PATCH 1/4] usb: typec: ucsi: Clean up UCSI_CABLE_PROP macros

[Prashant Malani]

On Thu, Feb 22, 2024 at 5:04 PM Jameson Thies <jthies@google.com> wrote:
>
> Clean up UCSI_CABLE_PROP macros by fixing a bitmask shifting error for
> plug type and updating the modal support macro for consistent naming.
>
> Fixes: 3cf657f07918 ("usb: typec: ucsi: Remove all bit-fields")
> Signed-off-by: Jameson Thies <jthies@google.com>
 I think you should CC stable@ for this patch.

That apart:
Reviewed-by: Prashant Malani <pmalani@chromium.org>

Re: [PATCH 2/4] usb: typec: ucsi: Register cables based on GET_CABLE_PROPERTY

[Prashant Malani]

On Thu, Feb 22, 2024 at 5:04 PM Jameson Thies <jthies@google.com> wrote:
>
> Register cables with the Type-C Connector Class in the UCSI driver based
> on the PPM response to GET_CABLE_PROPERTY. Registered cable properties
> include plug type, cable type and major revision.
>
> Signed-off-by: Jameson Thies <jthies@google.com>
Reviewed-by: Prashant Malani <pmalani@chromium.org>

Re: [PATCH 4/4] usb: typec: ucsi: Register SOP' alternate modes with cable plug

[Benson Leung]

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Hi Jameson,

On Fri, Feb 23, 2024 at 01:03:28AM +0000, Jameson Thies wrote:
> Register SOP' alternate modes with a Type-C Connector Class cable plug.
> Alternate modes are queried from the PPM using the GET_ALTERNATE_MODES
> command with recipient set to SOP'.
> 

Is there a plan to do the same for the SOP Double Prime for advanced active
cables with two plugs?

> Signed-off-by: Jameson Thies <jthies@google.com>

Other than that question,

Reviewed-by: Benson Leung <bleung@chromium.org>

> ---
> Tested on v6.6 kernel. SOP' GET_ALTERNATE_MODE responses from the PPM
> are correctly registered as to the cable plug.
> redrix-rev3 /sys/class/typec # ls port2-cable/port2-plug0/
> device  port2-plug0.0  port2-plug0.1  power  subsystem  uevent
> 
>  drivers/usb/typec/ucsi/ucsi.c | 60 +++++++++++++++++++++++++++++++++++
>  drivers/usb/typec/ucsi/ucsi.h |  2 ++
>  2 files changed, 62 insertions(+)
> 
> diff --git a/drivers/usb/typec/ucsi/ucsi.c b/drivers/usb/typec/ucsi/ucsi.c
> index 6d6443e61faa..9b541547917b 100644
> --- a/drivers/usb/typec/ucsi/ucsi.c
> +++ b/drivers/usb/typec/ucsi/ucsi.c
> @@ -399,6 +399,27 @@ static int ucsi_register_altmode(struct ucsi_connector *con,
>  
>  		con->partner_altmode[i] = alt;
>  		break;
> +	case UCSI_RECIPIENT_SOP_P:
> +		i = ucsi_next_altmode(con->plug_altmode);
> +		if (i < 0) {
> +			ret = i;
> +			goto err;
> +		}
> +
> +		ret = ucsi_altmode_next_mode(con->plug_altmode, desc->svid);
> +		if (ret < 0)
> +			return ret;
> +
> +		desc->mode = ret;
> +
> +		alt = typec_plug_register_altmode(con->plug, desc);
> +		if (IS_ERR(alt)) {
> +			ret = PTR_ERR(alt);
> +			goto err;
> +		}
> +
> +		con->plug_altmode[i] = alt;
> +		break;
>  	default:
>  		return -EINVAL;
>  	}
> @@ -566,6 +587,9 @@ static void ucsi_unregister_altmodes(struct ucsi_connector *con, u8 recipient)
>  	case UCSI_RECIPIENT_SOP:
>  		adev = con->partner_altmode;
>  		break;
> +	case UCSI_RECIPIENT_SOP_P:
> +		adev = con->plug_altmode;
> +		break;
>  	default:
>  		return;
>  	}
> @@ -801,6 +825,33 @@ static void ucsi_unregister_partner_pdos(struct ucsi_connector *con)
>  	con->partner_pd = NULL;
>  }
>  
> +static int ucsi_register_plug(struct ucsi_connector *con)
> +{
> +	struct typec_plug *plug;
> +	struct typec_plug_desc desc = {.index = TYPEC_PLUG_SOP_P};
> +
> +	plug = typec_register_plug(con->cable, &desc);
> +	if (IS_ERR(plug)) {
> +		dev_err(con->ucsi->dev,
> +			"con%d: failed to register plug (%ld)\n", con->num,
> +			PTR_ERR(plug));
> +		return PTR_ERR(plug);
> +	}
> +
> +	con->plug = plug;
> +	return 0;
> +}
> +
> +static void ucsi_unregister_plug(struct ucsi_connector *con)
> +{
> +	if (!con->plug)
> +		return;
> +
> +	ucsi_unregister_altmodes(con, UCSI_RECIPIENT_SOP_P);
> +	typec_unregister_plug(con->plug);
> +	con->plug = NULL;
> +}
> +
>  static int ucsi_register_cable(struct ucsi_connector *con)
>  {
>  	struct typec_cable *cable;
> @@ -842,6 +893,7 @@ static void ucsi_unregister_cable(struct ucsi_connector *con)
>  	if (!con->cable)
>  		return;
>  
> +	ucsi_unregister_plug(con);
>  	typec_unregister_cable(con->cable);
>  	con->cable = NULL;
>  	memset(&con->cable_identity, 0, sizeof(con->cable_identity));
> @@ -1046,6 +1098,14 @@ static int ucsi_check_cable(struct ucsi_connector *con)
>  	if (ret < 0)
>  		return ret;
>  
> +	ret = ucsi_register_plug(con);
> +	if (ret < 0)
> +		return ret;
> +
> +	ret = ucsi_register_altmodes(con, UCSI_RECIPIENT_SOP_P);
> +	if (ret < 0)
> +		return ret;
> +
>  	return 0;
>  }
>  
> diff --git a/drivers/usb/typec/ucsi/ucsi.h b/drivers/usb/typec/ucsi/ucsi.h
> index b89fae82e8ce..32daf5f58650 100644
> --- a/drivers/usb/typec/ucsi/ucsi.h
> +++ b/drivers/usb/typec/ucsi/ucsi.h
> @@ -429,9 +429,11 @@ struct ucsi_connector {
>  	struct typec_port *port;
>  	struct typec_partner *partner;
>  	struct typec_cable *cable;
> +	struct typec_plug *plug;
>  
>  	struct typec_altmode *port_altmode[UCSI_MAX_ALTMODES];
>  	struct typec_altmode *partner_altmode[UCSI_MAX_ALTMODES];
> +	struct typec_altmode *plug_altmode[UCSI_MAX_ALTMODES];
>  
>  	struct typec_capability typec_cap;
>  
> -- 
> 2.44.0.rc0.258.g7320e95886-goog
> 

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Re: [PATCH 0/4] usb: typec: ucsi: Expand SOP/SOP' Discovery

[Dmitry Baryshkov]

Hi Jameson,

On Fri, 23 Feb 2024 at 03:04, Jameson Thies <jthies@google.com> wrote:
>
> Hi Heikki,
>
> This patch series expands support for partner and cable discover in the
> UCSI driver. There are a few pieces here.
>
> 1. Some cleanup of the GET_CABLE_PROP definitions in ucsi.h.
> 2. Cable discovery and registration with the USB Type-C connector class.
> 3. Partner/Cable identity registration with the USB Type-C connector
> class.
> 4. SOP' alternate mode registration with the USB-C connector class using
> a cable plug.
>
> These have been tested on a v6.6 kernel build running a usermode ppm
> with a Realtek EVB. Let me know if you have any questions.

First and the most obvious comment: 6.6 is four months old. I see that
your base commit is the usb-testing tip, however you declare that you
tested only on 6.6. Now I'm confused. Did you test your patches on top
of usb-testing before sending them?


-- 
With best wishes
Dmitry

Re: [PATCH 1/4] usb: typec: ucsi: Clean up UCSI_CABLE_PROP macros

[Dmitry Baryshkov]

On Fri, 23 Feb 2024 at 03:04, Jameson Thies <jthies@google.com> wrote:
>
> Clean up UCSI_CABLE_PROP macros by fixing a bitmask shifting error for
> plug type and updating the modal support macro for consistent naming.
>
> Fixes: 3cf657f07918 ("usb: typec: ucsi: Remove all bit-fields")
> Signed-off-by: Jameson Thies <jthies@google.com>
> ---
> Tested by building v6.6 kernel.
>
>  drivers/usb/typec/ucsi/ucsi.h | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)

Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>

-- 
With best wishes
Dmitry

Re: [PATCH 2/4] usb: typec: ucsi: Register cables based on GET_CABLE_PROPERTY

[Dmitry Baryshkov]

On Fri, 23 Feb 2024 at 03:04, Jameson Thies <jthies@google.com> wrote:
>
> Register cables with the Type-C Connector Class in the UCSI driver based
> on the PPM response to GET_CABLE_PROPERTY. Registered cable properties
> include plug type, cable type and major revision.
>
> Signed-off-by: Jameson Thies <jthies@google.com>
> ---
> Tested on v6.6 kernel. Expected cable properties populate the USB Type-C
> connector class sysfs paths:
> redrix-rev3 /sys/class/typec # ls port2-cable
> device  identity  plug_type  port2-plug0  power  subsystem  type  uevent
> usb_power_delivery_revision
>
>  drivers/usb/typec/ucsi/ucsi.c | 69 +++++++++++++++++++++++++++++++++++
>  drivers/usb/typec/ucsi/ucsi.h |  5 +++
>  2 files changed, 74 insertions(+)

Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>

>
>

-- 
With best wishes
Dmitry

Re: [PATCH 3/4] usb: typec: ucsi: Register SOP/SOP' Discover Identity Responses

[Dmitry Baryshkov]

On Fri, 23 Feb 2024 at 03:04, Jameson Thies <jthies@google.com> wrote:
>
> Register SOP and SOP' Discover Identity responses with the USB Type-C
> Connector Class as partner and cable identities, respectively. Discover
> Identity responses are requested from the PPM using the GET_PD_MESSAGE
> UCSI command.
>
> Signed-off-by: Jameson Thies <jthies@google.com>
> ---
> Tested on v6.6 kernel. GET_PD_MESSAGE responses from the PPM populate
> partner and cable identity in sysfs.
> redrix-rev3 /sys/class/typec # ls port2-partner/identity/
> cert_stat  id_header  product  product_type_vdo1  product_type_vdo2
> product_type_vdo3
> redrix-rev3 /sys/class/typec # ls port2-cable/identity/
> cert_stat  id_header  product  product_type_vdo1  product_type_vdo2
> product_type_vdo3
>
>  drivers/usb/typec/ucsi/ucsi.c | 77 +++++++++++++++++++++++++++++++++++
>  drivers/usb/typec/ucsi/ucsi.h | 29 +++++++++++++
>  2 files changed, 106 insertions(+)
>
> diff --git a/drivers/usb/typec/ucsi/ucsi.c b/drivers/usb/typec/ucsi/ucsi.c
> index 15e82f5fab37..6d6443e61faa 100644
> --- a/drivers/usb/typec/ucsi/ucsi.c
> +++ b/drivers/usb/typec/ucsi/ucsi.c
> @@ -646,6 +646,73 @@ static int ucsi_get_src_pdos(struct ucsi_connector *con)
>         return ret;
>  }
>
> +static int ucsi_read_identity(struct ucsi_connector *con, u8 recipient, struct usb_pd_identity *id)
> +{
> +       struct ucsi *ucsi = con->ucsi;
> +       struct ucsi_pd_message_disc_id resp = {};
> +       u64 command;
> +       int ret;
> +
> +       /*
> +        * Skip identity discovery and registration if UCSI version is less than
> +        * v2.0. Before v2.0 MESSAGE_IN is 16 bytes which cannot fit a complete
> +        * 24 byte identity response.

Please consider using two commands to retrieve the data. This will
allow you to support UCSI 1.x too.

> +        */
> +       if (ucsi->version < UCSI_VERSION_2_0)
> +               return -EPROTO;
> +
> +       command = UCSI_COMMAND(UCSI_GET_PD_MESSAGE) | UCSI_CONNECTOR_NUMBER(con->num);
> +       command |= UCSI_GET_PD_MESSAGE_RECIPIENT(recipient);
> +       /* VDM Header + 6 VDOs (0x1c bytes) without an offset */
> +       command |= UCSI_GET_PD_MESSAGE_OFFSET(0);
> +       command |= UCSI_GET_PD_MESSAGE_BYTES(0x1c);
> +       command |= UCSI_GET_PD_MESSAGE_TYPE(UCSI_GET_PD_MESSAGE_TYPE_IDENTITY);
> +
> +       ret = ucsi_send_command(ucsi, command, &resp, sizeof(resp));
> +       if (ret < 0) {
> +               dev_err(ucsi->dev, "UCSI_GET_PD_MESSAGE failed (%d)\n", ret);
> +               return ret;
> +       }
> +
> +       id->id_header = resp.id_header;
> +       id->cert_stat = resp.cert_stat;
> +       id->product = resp.product;
> +       id->vdo[0] = resp.vdo[0];
> +       id->vdo[1] = resp.vdo[1];
> +       id->vdo[2] = resp.vdo[2];
> +       return 0;
> +}
> +
> +static int ucsi_get_partner_identity(struct ucsi_connector *con)
> +{
> +       int ret;
> +
> +       ret = ucsi_read_identity(con, UCSI_RECIPIENT_SOP, &con->partner_identity);
> +       if (ret < 0)
> +               return ret;
> +
> +       ret = typec_partner_set_identity(con->partner);
> +       if (ret < 0)
> +               dev_err(con->ucsi->dev, "Failed to set partner identity (%d)\n", ret);
> +
> +       return ret;
> +}
> +
> +static int ucsi_get_cable_identity(struct ucsi_connector *con)
> +{
> +       int ret;
> +
> +       ret = ucsi_read_identity(con, UCSI_RECIPIENT_SOP_P, &con->cable_identity);
> +       if (ret < 0)
> +               return ret;
> +
> +       ret = typec_cable_set_identity(con->cable);
> +       if (ret < 0)
> +               dev_err(con->ucsi->dev, "Failed to set cable identity (%d)\n", ret);
> +
> +       return ret;
> +}
> +
>  static int ucsi_check_altmodes(struct ucsi_connector *con)
>  {
>         int ret, num_partner_am;
> @@ -754,6 +821,7 @@ static int ucsi_register_cable(struct ucsi_connector *con)
>                 break;
>         }
>
> +       desc.identity = &con->cable_identity;
>         desc.active = !!(UCSI_CABLE_PROP_FLAG_ACTIVE_CABLE & con->cable_prop.flags);
>         desc.pd_revision = UCSI_CABLE_PROP_FLAG_PD_MAJOR_REV_AS_BCD(con->cable_prop.flags);
>
> @@ -776,6 +844,7 @@ static void ucsi_unregister_cable(struct ucsi_connector *con)
>
>         typec_unregister_cable(con->cable);
>         con->cable = NULL;
> +       memset(&con->cable_identity, 0, sizeof(con->cable_identity));

Nit: I'd probably call memset before setting con->cable to NULL.

>  }
>
>  static void ucsi_pwr_opmode_change(struct ucsi_connector *con)
> @@ -825,6 +894,7 @@ static int ucsi_register_partner(struct ucsi_connector *con)
>                 break;
>         }
>
> +       desc.identity = &con->partner_identity;
>         desc.usb_pd = pwr_opmode == UCSI_CONSTAT_PWR_OPMODE_PD;
>         desc.pd_revision = UCSI_CONCAP_FLAG_PARTNER_PD_MAJOR_REV_AS_BCD(con->cap.flags);
>
> @@ -854,6 +924,7 @@ static void ucsi_unregister_partner(struct ucsi_connector *con)
>         ucsi_unregister_cable(con);
>         typec_unregister_partner(con->partner);
>         con->partner = NULL;
> +       memset(&con->partner_identity, 0, sizeof(con->partner_identity));

And the same here.

>  }
>
>  static void ucsi_partner_change(struct ucsi_connector *con)
> @@ -971,6 +1042,10 @@ 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;
> +
>         return 0;
>  }
>
> @@ -1015,6 +1090,7 @@ 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 (UCSI_CONSTAT_PWR_OPMODE(con->status.flags) ==
> @@ -1414,6 +1490,7 @@ 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);
>         }
>
> diff --git a/drivers/usb/typec/ucsi/ucsi.h b/drivers/usb/typec/ucsi/ucsi.h
> index f0aabef0b7c6..b89fae82e8ce 100644
> --- a/drivers/usb/typec/ucsi/ucsi.h
> +++ b/drivers/usb/typec/ucsi/ucsi.h
> @@ -106,6 +106,7 @@ void ucsi_connector_change(struct ucsi *ucsi, u8 num);
>  #define UCSI_GET_CABLE_PROPERTY                0x11
>  #define UCSI_GET_CONNECTOR_STATUS      0x12
>  #define UCSI_GET_ERROR_STATUS          0x13
> +#define UCSI_GET_PD_MESSAGE            0x15
>
>  #define UCSI_CONNECTOR_NUMBER(_num_)           ((u64)(_num_) << 16)
>  #define UCSI_COMMAND(_cmd_)                    ((_cmd_) & 0xff)
> @@ -159,6 +160,18 @@ void ucsi_connector_change(struct ucsi *ucsi, u8 num);
>  #define UCSI_MAX_PDOS                          (4)
>  #define UCSI_GET_PDOS_SRC_PDOS                 ((u64)1 << 34)
>
> +/* GET_PD_MESSAGE command bits */
> +#define UCSI_GET_PD_MESSAGE_RECIPIENT(_r_)     ((u64)(_r_) << 23)
> +#define UCSI_GET_PD_MESSAGE_OFFSET(_r_)                ((u64)(_r_) << 26)
> +#define UCSI_GET_PD_MESSAGE_BYTES(_r_)         ((u64)(_r_) << 34)
> +#define UCSI_GET_PD_MESSAGE_TYPE(_r_)          ((u64)(_r_) << 42)
> +#define   UCSI_GET_PD_MESSAGE_TYPE_SNK_CAP_EXT 0
> +#define   UCSI_GET_PD_MESSAGE_TYPE_SRC_CAP_EXT 1
> +#define   UCSI_GET_PD_MESSAGE_TYPE_BAT_CAP     2
> +#define   UCSI_GET_PD_MESSAGE_TYPE_BAT_STAT    3
> +#define   UCSI_GET_PD_MESSAGE_TYPE_IDENTITY    4
> +#define   UCSI_GET_PD_MESSAGE_TYPE_REVISION    5
> +
>  /* -------------------------------------------------------------------------- */
>
>  /* Error information returned by PPM in response to GET_ERROR_STATUS command. */
> @@ -338,6 +351,18 @@ struct ucsi_connector_status {
>         ((get_unaligned_le32(&(_p_)[5]) & GENMASK(16, 1)) >> 1)
>  } __packed;
>
> +/*
> + * Data structure filled by PPM in response to GET_PD_MESSAGE command with the
> + * Response Message Type set to Discover Identity Response.
> + */
> +struct ucsi_pd_message_disc_id {
> +       u32 vdm_header;
> +       u32 id_header;
> +       u32 cert_stat;
> +       u32 product;
> +       u32 vdo[3];
> +} __packed;
> +
>  /* -------------------------------------------------------------------------- */
>
>  struct ucsi_debugfs_entry {
> @@ -428,6 +453,10 @@ struct ucsi_connector {
>         struct usb_power_delivery_capabilities *partner_sink_caps;
>
>         struct usb_role_switch *usb_role_sw;
> +
> +       /* USB PD identity */
> +       struct usb_pd_identity partner_identity;
> +       struct usb_pd_identity cable_identity;
>  };
>
>  int ucsi_send_command(struct ucsi *ucsi, u64 command,
> --
> 2.44.0.rc0.258.g7320e95886-goog
>


-- 
With best wishes
Dmitry

Re: [PATCH 4/4] usb: typec: ucsi: Register SOP' alternate modes with cable plug

[Prashant Malani]

On Thu, Feb 22, 2024 at 5:05 PM Jameson Thies <jthies@google.com> wrote:
>
> Register SOP' alternate modes with a Type-C Connector Class cable plug.
> Alternate modes are queried from the PPM using the GET_ALTERNATE_MODES
> command with recipient set to SOP'.
>
> Signed-off-by: Jameson Thies <jthies@google.com>
Reviewed-by: Prashant Malani <pmalani@chromium.org>

Re: [PATCH 1/4] usb: typec: ucsi: Clean up UCSI_CABLE_PROP macros

[Heikki Krogerus]

On Fri, Feb 23, 2024 at 01:03:25AM +0000, Jameson Thies wrote:
> Clean up UCSI_CABLE_PROP macros by fixing a bitmask shifting error for
> plug type and updating the modal support macro for consistent naming.
> 
> Fixes: 3cf657f07918 ("usb: typec: ucsi: Remove all bit-fields")
> Signed-off-by: Jameson Thies <jthies@google.com>

This is missing CC stable.

> ---
> Tested by building v6.6 kernel.
> 
>  drivers/usb/typec/ucsi/ucsi.h | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/usb/typec/ucsi/ucsi.h b/drivers/usb/typec/ucsi/ucsi.h
> index 7e35ffbe0a6f..469a2baf472e 100644
> --- a/drivers/usb/typec/ucsi/ucsi.h
> +++ b/drivers/usb/typec/ucsi/ucsi.h
> @@ -259,12 +259,12 @@ struct ucsi_cable_property {
>  #define UCSI_CABLE_PROP_FLAG_VBUS_IN_CABLE	BIT(0)
>  #define UCSI_CABLE_PROP_FLAG_ACTIVE_CABLE	BIT(1)
>  #define UCSI_CABLE_PROP_FLAG_DIRECTIONALITY	BIT(2)
> -#define UCSI_CABLE_PROP_FLAG_PLUG_TYPE(_f_)	((_f_) & GENMASK(3, 0))
> +#define UCSI_CABLE_PROP_FLAG_PLUG_TYPE(_f_)	(((_f_) & GENMASK(4, 3)) >> 3)
>  #define   UCSI_CABLE_PROPERTY_PLUG_TYPE_A	0
>  #define   UCSI_CABLE_PROPERTY_PLUG_TYPE_B	1
>  #define   UCSI_CABLE_PROPERTY_PLUG_TYPE_C	2
>  #define   UCSI_CABLE_PROPERTY_PLUG_OTHER	3
> -#define UCSI_CABLE_PROP_MODE_SUPPORT		BIT(5)
> +#define UCSI_CABLE_PROP_FLAG_MODE_SUPPORT	BIT(5)
>  	u8 latency;
>  } __packed;
>  
> -- 
> 2.44.0.rc0.258.g7320e95886-goog

-- 
heikki

Re: [PATCH 2/4] usb: typec: ucsi: Register cables based on GET_CABLE_PROPERTY

[Heikki Krogerus]

On Fri, Feb 23, 2024 at 01:03:26AM +0000, Jameson Thies wrote:
> Register cables with the Type-C Connector Class in the UCSI driver based
> on the PPM response to GET_CABLE_PROPERTY. Registered cable properties
> include plug type, cable type and major revision.
> 
> Signed-off-by: Jameson Thies <jthies@google.com>

Reviewed-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>

> ---
> Tested on v6.6 kernel. Expected cable properties populate the USB Type-C
> connector class sysfs paths:
> redrix-rev3 /sys/class/typec # ls port2-cable
> device  identity  plug_type  port2-plug0  power  subsystem  type  uevent
> usb_power_delivery_revision
> 
>  drivers/usb/typec/ucsi/ucsi.c | 69 +++++++++++++++++++++++++++++++++++
>  drivers/usb/typec/ucsi/ucsi.h |  5 +++
>  2 files changed, 74 insertions(+)
> 
> diff --git a/drivers/usb/typec/ucsi/ucsi.c b/drivers/usb/typec/ucsi/ucsi.c
> index ae105383e69e..15e82f5fab37 100644
> --- a/drivers/usb/typec/ucsi/ucsi.c
> +++ b/drivers/usb/typec/ucsi/ucsi.c
> @@ -734,6 +734,50 @@ static void ucsi_unregister_partner_pdos(struct ucsi_connector *con)
>  	con->partner_pd = NULL;
>  }
>  
> +static int ucsi_register_cable(struct ucsi_connector *con)
> +{
> +	struct typec_cable *cable;
> +	struct typec_cable_desc desc = {};
> +
> +	switch (UCSI_CABLE_PROP_FLAG_PLUG_TYPE(con->cable_prop.flags)) {
> +	case UCSI_CABLE_PROPERTY_PLUG_TYPE_A:
> +		desc.type = USB_PLUG_TYPE_A;
> +		break;
> +	case UCSI_CABLE_PROPERTY_PLUG_TYPE_B:
> +		desc.type = USB_PLUG_TYPE_B;
> +		break;
> +	case UCSI_CABLE_PROPERTY_PLUG_TYPE_C:
> +		desc.type = USB_PLUG_TYPE_C;
> +		break;
> +	default:
> +		desc.type = USB_PLUG_NONE;
> +		break;
> +	}
> +
> +	desc.active = !!(UCSI_CABLE_PROP_FLAG_ACTIVE_CABLE & con->cable_prop.flags);
> +	desc.pd_revision = UCSI_CABLE_PROP_FLAG_PD_MAJOR_REV_AS_BCD(con->cable_prop.flags);
> +
> +	cable = typec_register_cable(con->port, &desc);
> +	if (IS_ERR(cable)) {
> +		dev_err(con->ucsi->dev,
> +			"con%d: failed to register cable (%ld)\n", con->num,
> +			PTR_ERR(cable));
> +		return PTR_ERR(cable);
> +	}
> +
> +	con->cable = cable;
> +	return 0;
> +}
> +
> +static void ucsi_unregister_cable(struct ucsi_connector *con)
> +{
> +	if (!con->cable)
> +		return;
> +
> +	typec_unregister_cable(con->cable);
> +	con->cable = NULL;
> +}
> +
>  static void ucsi_pwr_opmode_change(struct ucsi_connector *con)
>  {
>  	switch (UCSI_CONSTAT_PWR_OPMODE(con->status.flags)) {
> @@ -807,6 +851,7 @@ static void ucsi_unregister_partner(struct ucsi_connector *con)
>  	typec_partner_set_usb_power_delivery(con->partner, NULL);
>  	ucsi_unregister_partner_pdos(con);
>  	ucsi_unregister_altmodes(con, UCSI_RECIPIENT_SOP);
> +	ucsi_unregister_cable(con);
>  	typec_unregister_partner(con->partner);
>  	con->partner = NULL;
>  }
> @@ -907,6 +952,28 @@ static int ucsi_check_connection(struct ucsi_connector *con)
>  	return 0;
>  }
>  
> +static int ucsi_check_cable(struct ucsi_connector *con)
> +{
> +	u64 command;
> +	int ret;
> +
> +	if (con->cable)
> +		return 0;
> +
> +	command = UCSI_GET_CABLE_PROPERTY | UCSI_CONNECTOR_NUMBER(con->num);
> +	ret = ucsi_send_command(con->ucsi, command, &con->cable_prop, sizeof(con->cable_prop));
> +	if (ret < 0) {
> +		dev_err(con->ucsi->dev, "GET_CABLE_PROPERTY failed (%d)\n", ret);
> +		return ret;
> +	}
> +
> +	ret = ucsi_register_cable(con);
> +	if (ret < 0)
> +		return ret;
> +
> +	return 0;
> +}
> +
>  static void ucsi_handle_connector_change(struct work_struct *work)
>  {
>  	struct ucsi_connector *con = container_of(work, struct ucsi_connector,
> @@ -948,6 +1015,7 @@ 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_check_cable, 1, HZ);
>  
>  			if (UCSI_CONSTAT_PWR_OPMODE(con->status.flags) ==
>  			    UCSI_CONSTAT_PWR_OPMODE_PD)
> @@ -1346,6 +1414,7 @@ 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_check_cable(con);
>  	}
>  
>  	/* Only notify USB controller if partner supports USB data */
> diff --git a/drivers/usb/typec/ucsi/ucsi.h b/drivers/usb/typec/ucsi/ucsi.h
> index 469a2baf472e..f0aabef0b7c6 100644
> --- a/drivers/usb/typec/ucsi/ucsi.h
> +++ b/drivers/usb/typec/ucsi/ucsi.h
> @@ -265,6 +265,9 @@ struct ucsi_cable_property {
>  #define   UCSI_CABLE_PROPERTY_PLUG_TYPE_C	2
>  #define   UCSI_CABLE_PROPERTY_PLUG_OTHER	3
>  #define UCSI_CABLE_PROP_FLAG_MODE_SUPPORT	BIT(5)
> +#define UCSI_CABLE_PROP_FLAG_PD_MAJOR_REV(_f_)	(((_f_) & GENMASK(7, 6)) >> 6)
> +#define UCSI_CABLE_PROP_FLAG_PD_MAJOR_REV_AS_BCD(_f_) \
> +	UCSI_SPEC_REVISION_TO_BCD(UCSI_CABLE_PROP_FLAG_PD_MAJOR_REV(_f_))
>  	u8 latency;
>  } __packed;
>  
> @@ -400,6 +403,7 @@ struct ucsi_connector {
>  
>  	struct typec_port *port;
>  	struct typec_partner *partner;
> +	struct typec_cable *cable;
>  
>  	struct typec_altmode *port_altmode[UCSI_MAX_ALTMODES];
>  	struct typec_altmode *partner_altmode[UCSI_MAX_ALTMODES];
> @@ -408,6 +412,7 @@ struct ucsi_connector {
>  
>  	struct ucsi_connector_status status;
>  	struct ucsi_connector_capability cap;
> +	struct ucsi_cable_property cable_prop;
>  	struct power_supply *psy;
>  	struct power_supply_desc psy_desc;
>  	u32 rdo;
> -- 
> 2.44.0.rc0.258.g7320e95886-goog

-- 
heikki

Re: [PATCH 3/4] usb: typec: ucsi: Register SOP/SOP' Discover Identity Responses

[Heikki Krogerus]

On Fri, Feb 23, 2024 at 01:03:27AM +0000, Jameson Thies wrote:
> Register SOP and SOP' Discover Identity responses with the USB Type-C
> Connector Class as partner and cable identities, respectively. Discover
> Identity responses are requested from the PPM using the GET_PD_MESSAGE
> UCSI command.
> 
> Signed-off-by: Jameson Thies <jthies@google.com>

Reviewed-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>

> ---
> Tested on v6.6 kernel. GET_PD_MESSAGE responses from the PPM populate
> partner and cable identity in sysfs.
> redrix-rev3 /sys/class/typec # ls port2-partner/identity/
> cert_stat  id_header  product  product_type_vdo1  product_type_vdo2
> product_type_vdo3
> redrix-rev3 /sys/class/typec # ls port2-cable/identity/
> cert_stat  id_header  product  product_type_vdo1  product_type_vdo2
> product_type_vdo3
> 
>  drivers/usb/typec/ucsi/ucsi.c | 77 +++++++++++++++++++++++++++++++++++
>  drivers/usb/typec/ucsi/ucsi.h | 29 +++++++++++++
>  2 files changed, 106 insertions(+)
> 
> diff --git a/drivers/usb/typec/ucsi/ucsi.c b/drivers/usb/typec/ucsi/ucsi.c
> index 15e82f5fab37..6d6443e61faa 100644
> --- a/drivers/usb/typec/ucsi/ucsi.c
> +++ b/drivers/usb/typec/ucsi/ucsi.c
> @@ -646,6 +646,73 @@ static int ucsi_get_src_pdos(struct ucsi_connector *con)
>  	return ret;
>  }
>  
> +static int ucsi_read_identity(struct ucsi_connector *con, u8 recipient, struct usb_pd_identity *id)
> +{
> +	struct ucsi *ucsi = con->ucsi;
> +	struct ucsi_pd_message_disc_id resp = {};
> +	u64 command;
> +	int ret;
> +
> +	/*
> +	 * Skip identity discovery and registration if UCSI version is less than
> +	 * v2.0. Before v2.0 MESSAGE_IN is 16 bytes which cannot fit a complete
> +	 * 24 byte identity response.
> +	 */
> +	if (ucsi->version < UCSI_VERSION_2_0)
> +		return -EPROTO;
> +
> +	command = UCSI_COMMAND(UCSI_GET_PD_MESSAGE) | UCSI_CONNECTOR_NUMBER(con->num);
> +	command |= UCSI_GET_PD_MESSAGE_RECIPIENT(recipient);
> +	/* VDM Header + 6 VDOs (0x1c bytes) without an offset */
> +	command |= UCSI_GET_PD_MESSAGE_OFFSET(0);
> +	command |= UCSI_GET_PD_MESSAGE_BYTES(0x1c);
> +	command |= UCSI_GET_PD_MESSAGE_TYPE(UCSI_GET_PD_MESSAGE_TYPE_IDENTITY);
> +
> +	ret = ucsi_send_command(ucsi, command, &resp, sizeof(resp));
> +	if (ret < 0) {
> +		dev_err(ucsi->dev, "UCSI_GET_PD_MESSAGE failed (%d)\n", ret);
> +		return ret;
> +	}
> +
> +	id->id_header = resp.id_header;
> +	id->cert_stat = resp.cert_stat;
> +	id->product = resp.product;
> +	id->vdo[0] = resp.vdo[0];
> +	id->vdo[1] = resp.vdo[1];
> +	id->vdo[2] = resp.vdo[2];
> +	return 0;
> +}
> +
> +static int ucsi_get_partner_identity(struct ucsi_connector *con)
> +{
> +	int ret;
> +
> +	ret = ucsi_read_identity(con, UCSI_RECIPIENT_SOP, &con->partner_identity);
> +	if (ret < 0)
> +		return ret;
> +
> +	ret = typec_partner_set_identity(con->partner);
> +	if (ret < 0)
> +		dev_err(con->ucsi->dev, "Failed to set partner identity (%d)\n", ret);
> +
> +	return ret;
> +}
> +
> +static int ucsi_get_cable_identity(struct ucsi_connector *con)
> +{
> +	int ret;
> +
> +	ret = ucsi_read_identity(con, UCSI_RECIPIENT_SOP_P, &con->cable_identity);
> +	if (ret < 0)
> +		return ret;
> +
> +	ret = typec_cable_set_identity(con->cable);
> +	if (ret < 0)
> +		dev_err(con->ucsi->dev, "Failed to set cable identity (%d)\n", ret);
> +
> +	return ret;
> +}
> +
>  static int ucsi_check_altmodes(struct ucsi_connector *con)
>  {
>  	int ret, num_partner_am;
> @@ -754,6 +821,7 @@ static int ucsi_register_cable(struct ucsi_connector *con)
>  		break;
>  	}
>  
> +	desc.identity = &con->cable_identity;
>  	desc.active = !!(UCSI_CABLE_PROP_FLAG_ACTIVE_CABLE & con->cable_prop.flags);
>  	desc.pd_revision = UCSI_CABLE_PROP_FLAG_PD_MAJOR_REV_AS_BCD(con->cable_prop.flags);
>  
> @@ -776,6 +844,7 @@ static void ucsi_unregister_cable(struct ucsi_connector *con)
>  
>  	typec_unregister_cable(con->cable);
>  	con->cable = NULL;
> +	memset(&con->cable_identity, 0, sizeof(con->cable_identity));
>  }
>  
>  static void ucsi_pwr_opmode_change(struct ucsi_connector *con)
> @@ -825,6 +894,7 @@ static int ucsi_register_partner(struct ucsi_connector *con)
>  		break;
>  	}
>  
> +	desc.identity = &con->partner_identity;
>  	desc.usb_pd = pwr_opmode == UCSI_CONSTAT_PWR_OPMODE_PD;
>  	desc.pd_revision = UCSI_CONCAP_FLAG_PARTNER_PD_MAJOR_REV_AS_BCD(con->cap.flags);
>  
> @@ -854,6 +924,7 @@ static void ucsi_unregister_partner(struct ucsi_connector *con)
>  	ucsi_unregister_cable(con);
>  	typec_unregister_partner(con->partner);
>  	con->partner = NULL;
> +	memset(&con->partner_identity, 0, sizeof(con->partner_identity));
>  }
>  
>  static void ucsi_partner_change(struct ucsi_connector *con)
> @@ -971,6 +1042,10 @@ 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;
> +
>  	return 0;
>  }
>  
> @@ -1015,6 +1090,7 @@ 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 (UCSI_CONSTAT_PWR_OPMODE(con->status.flags) ==
> @@ -1414,6 +1490,7 @@ 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);
>  	}
>  
> diff --git a/drivers/usb/typec/ucsi/ucsi.h b/drivers/usb/typec/ucsi/ucsi.h
> index f0aabef0b7c6..b89fae82e8ce 100644
> --- a/drivers/usb/typec/ucsi/ucsi.h
> +++ b/drivers/usb/typec/ucsi/ucsi.h
> @@ -106,6 +106,7 @@ void ucsi_connector_change(struct ucsi *ucsi, u8 num);
>  #define UCSI_GET_CABLE_PROPERTY		0x11
>  #define UCSI_GET_CONNECTOR_STATUS	0x12
>  #define UCSI_GET_ERROR_STATUS		0x13
> +#define UCSI_GET_PD_MESSAGE		0x15
>  
>  #define UCSI_CONNECTOR_NUMBER(_num_)		((u64)(_num_) << 16)
>  #define UCSI_COMMAND(_cmd_)			((_cmd_) & 0xff)
> @@ -159,6 +160,18 @@ void ucsi_connector_change(struct ucsi *ucsi, u8 num);
>  #define UCSI_MAX_PDOS				(4)
>  #define UCSI_GET_PDOS_SRC_PDOS			((u64)1 << 34)
>  
> +/* GET_PD_MESSAGE command bits */
> +#define UCSI_GET_PD_MESSAGE_RECIPIENT(_r_)	((u64)(_r_) << 23)
> +#define UCSI_GET_PD_MESSAGE_OFFSET(_r_)		((u64)(_r_) << 26)
> +#define UCSI_GET_PD_MESSAGE_BYTES(_r_)		((u64)(_r_) << 34)
> +#define UCSI_GET_PD_MESSAGE_TYPE(_r_)		((u64)(_r_) << 42)
> +#define   UCSI_GET_PD_MESSAGE_TYPE_SNK_CAP_EXT	0
> +#define   UCSI_GET_PD_MESSAGE_TYPE_SRC_CAP_EXT	1
> +#define   UCSI_GET_PD_MESSAGE_TYPE_BAT_CAP	2
> +#define   UCSI_GET_PD_MESSAGE_TYPE_BAT_STAT	3
> +#define   UCSI_GET_PD_MESSAGE_TYPE_IDENTITY	4
> +#define   UCSI_GET_PD_MESSAGE_TYPE_REVISION	5
> +
>  /* -------------------------------------------------------------------------- */
>  
>  /* Error information returned by PPM in response to GET_ERROR_STATUS command. */
> @@ -338,6 +351,18 @@ struct ucsi_connector_status {
>  	((get_unaligned_le32(&(_p_)[5]) & GENMASK(16, 1)) >> 1)
>  } __packed;
>  
> +/*
> + * Data structure filled by PPM in response to GET_PD_MESSAGE command with the
> + * Response Message Type set to Discover Identity Response.
> + */
> +struct ucsi_pd_message_disc_id {
> +	u32 vdm_header;
> +	u32 id_header;
> +	u32 cert_stat;
> +	u32 product;
> +	u32 vdo[3];
> +} __packed;
> +
>  /* -------------------------------------------------------------------------- */
>  
>  struct ucsi_debugfs_entry {
> @@ -428,6 +453,10 @@ struct ucsi_connector {
>  	struct usb_power_delivery_capabilities *partner_sink_caps;
>  
>  	struct usb_role_switch *usb_role_sw;
> +
> +	/* USB PD identity */
> +	struct usb_pd_identity partner_identity;
> +	struct usb_pd_identity cable_identity;
>  };
>  
>  int ucsi_send_command(struct ucsi *ucsi, u64 command,
> -- 
> 2.44.0.rc0.258.g7320e95886-goog

-- 
heikki

Re: [PATCH 4/4] usb: typec: ucsi: Register SOP' alternate modes with cable plug

[Heikki Krogerus]

On Fri, Feb 23, 2024 at 01:03:28AM +0000, Jameson Thies wrote:
> Register SOP' alternate modes with a Type-C Connector Class cable plug.
> Alternate modes are queried from the PPM using the GET_ALTERNATE_MODES
> command with recipient set to SOP'.
> 
> Signed-off-by: Jameson Thies <jthies@google.com>

Reviewed-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>

> ---
> Tested on v6.6 kernel. SOP' GET_ALTERNATE_MODE responses from the PPM
> are correctly registered as to the cable plug.
> redrix-rev3 /sys/class/typec # ls port2-cable/port2-plug0/
> device  port2-plug0.0  port2-plug0.1  power  subsystem  uevent
> 
>  drivers/usb/typec/ucsi/ucsi.c | 60 +++++++++++++++++++++++++++++++++++
>  drivers/usb/typec/ucsi/ucsi.h |  2 ++
>  2 files changed, 62 insertions(+)
> 
> diff --git a/drivers/usb/typec/ucsi/ucsi.c b/drivers/usb/typec/ucsi/ucsi.c
> index 6d6443e61faa..9b541547917b 100644
> --- a/drivers/usb/typec/ucsi/ucsi.c
> +++ b/drivers/usb/typec/ucsi/ucsi.c
> @@ -399,6 +399,27 @@ static int ucsi_register_altmode(struct ucsi_connector *con,
>  
>  		con->partner_altmode[i] = alt;
>  		break;
> +	case UCSI_RECIPIENT_SOP_P:
> +		i = ucsi_next_altmode(con->plug_altmode);
> +		if (i < 0) {
> +			ret = i;
> +			goto err;
> +		}
> +
> +		ret = ucsi_altmode_next_mode(con->plug_altmode, desc->svid);
> +		if (ret < 0)
> +			return ret;
> +
> +		desc->mode = ret;
> +
> +		alt = typec_plug_register_altmode(con->plug, desc);
> +		if (IS_ERR(alt)) {
> +			ret = PTR_ERR(alt);
> +			goto err;
> +		}
> +
> +		con->plug_altmode[i] = alt;
> +		break;
>  	default:
>  		return -EINVAL;
>  	}
> @@ -566,6 +587,9 @@ static void ucsi_unregister_altmodes(struct ucsi_connector *con, u8 recipient)
>  	case UCSI_RECIPIENT_SOP:
>  		adev = con->partner_altmode;
>  		break;
> +	case UCSI_RECIPIENT_SOP_P:
> +		adev = con->plug_altmode;
> +		break;
>  	default:
>  		return;
>  	}
> @@ -801,6 +825,33 @@ static void ucsi_unregister_partner_pdos(struct ucsi_connector *con)
>  	con->partner_pd = NULL;
>  }
>  
> +static int ucsi_register_plug(struct ucsi_connector *con)
> +{
> +	struct typec_plug *plug;
> +	struct typec_plug_desc desc = {.index = TYPEC_PLUG_SOP_P};
> +
> +	plug = typec_register_plug(con->cable, &desc);
> +	if (IS_ERR(plug)) {
> +		dev_err(con->ucsi->dev,
> +			"con%d: failed to register plug (%ld)\n", con->num,
> +			PTR_ERR(plug));
> +		return PTR_ERR(plug);
> +	}
> +
> +	con->plug = plug;
> +	return 0;
> +}
> +
> +static void ucsi_unregister_plug(struct ucsi_connector *con)
> +{
> +	if (!con->plug)
> +		return;
> +
> +	ucsi_unregister_altmodes(con, UCSI_RECIPIENT_SOP_P);
> +	typec_unregister_plug(con->plug);
> +	con->plug = NULL;
> +}
> +
>  static int ucsi_register_cable(struct ucsi_connector *con)
>  {
>  	struct typec_cable *cable;
> @@ -842,6 +893,7 @@ static void ucsi_unregister_cable(struct ucsi_connector *con)
>  	if (!con->cable)
>  		return;
>  
> +	ucsi_unregister_plug(con);
>  	typec_unregister_cable(con->cable);
>  	con->cable = NULL;
>  	memset(&con->cable_identity, 0, sizeof(con->cable_identity));
> @@ -1046,6 +1098,14 @@ static int ucsi_check_cable(struct ucsi_connector *con)
>  	if (ret < 0)
>  		return ret;
>  
> +	ret = ucsi_register_plug(con);
> +	if (ret < 0)
> +		return ret;
> +
> +	ret = ucsi_register_altmodes(con, UCSI_RECIPIENT_SOP_P);
> +	if (ret < 0)
> +		return ret;
> +
>  	return 0;
>  }
>  
> diff --git a/drivers/usb/typec/ucsi/ucsi.h b/drivers/usb/typec/ucsi/ucsi.h
> index b89fae82e8ce..32daf5f58650 100644
> --- a/drivers/usb/typec/ucsi/ucsi.h
> +++ b/drivers/usb/typec/ucsi/ucsi.h
> @@ -429,9 +429,11 @@ struct ucsi_connector {
>  	struct typec_port *port;
>  	struct typec_partner *partner;
>  	struct typec_cable *cable;
> +	struct typec_plug *plug;
>  
>  	struct typec_altmode *port_altmode[UCSI_MAX_ALTMODES];
>  	struct typec_altmode *partner_altmode[UCSI_MAX_ALTMODES];
> +	struct typec_altmode *plug_altmode[UCSI_MAX_ALTMODES];
>  
>  	struct typec_capability typec_cap;
>  
> -- 
> 2.44.0.rc0.258.g7320e95886-goog

-- 
heikki

Re: [PATCH 3/4] usb: typec: ucsi: Register SOP/SOP' Discover Identity Responses

[Prashant Malani]

On Thu, Feb 22, 2024 at 5:04 PM Jameson Thies <jthies@google.com> wrote:
>
> Register SOP and SOP' Discover Identity responses with the USB Type-C
> Connector Class as partner and cable identities, respectively. Discover
> Identity responses are requested from the PPM using the GET_PD_MESSAGE
> UCSI command.
>
> Signed-off-by: Jameson Thies <jthies@google.com>
I've reviewed this internally already [1], and it looks good to me:

Reviewed-by: Prashant Malani <pmalani@chromium.org>

[1] https://chromium-review.googlesource.com/c/chromiumos/third_party/kernel/+/5260256

Re: [PATCH 0/4] usb: typec: ucsi: Expand SOP/SOP' Discovery

[Jameson Thies]

> First and the most obvious comment: 6.6 is four months old. I see that
> your base commit is the usb-testing tip, however you declare that you
> tested only on 6.6. Now I'm confused. Did you test your patches on top
> of usb-testing before sending them?

Hi Dmitry, sorry for the confusion. I tested this on a v6.6 kernel build
with a few dependent commits cherry-picked to it. I'll re-validate the
series on top of usb-testing.

Re: [PATCH 1/4] usb: typec: ucsi: Clean up UCSI_CABLE_PROP macros

[Jameson Thies]

> This is missing CC stable.

Ack. I'm planning a v2 version of this series to address the other
comments and will CC stable there.

Re: [PATCH 3/4] usb: typec: ucsi: Register SOP/SOP' Discover Identity Responses

[Jameson Thies]

> Please consider using two commands to retrieve the data. This will
> allow you to support UCSI 1.x too.

> Nit: I'd probably call memset before setting con->cable to NULL.

> And the same here.

Thanks for your feedback. I'll apply these changes in a v2 version of
this series.

Re: [PATCH 4/4] usb: typec: ucsi: Register SOP' alternate modes with cable plug

[Jameson Thies]

> Is there a plan to do the same for the SOP Double Prime for advanced active
> cables with two plugs?

Hey Benson, I am not currently planning to add support for SOP double
prime discovery. I currently don't see how information about the second
plug would impact mode entry decisions. But, we could always follow up
and add that if we find a reason to.