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Date: Thu, 3 Feb 2022 17:46:57 +0300
From: Heikki Krogerus <heikki.krogerus@...ux.intel.com>
To: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc: Guenter Roeck <linux@...ck-us.net>,
Benson Leung <bleung@...gle.com>,
Prashant Malani <pmalani@...omium.org>,
Jameson Thies <jthies@...gle.com>,
"Regupathy, Rajaram" <rajaram.regupathy@...el.com>,
linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH v1 3/3] usb: typec: ucsi: Register USB Power Delivery Capabilities
UCSI allows the USB PD capabilities to be read with the
GET_PDO command. This will register those capabilities, and
that way make them visible to the user space.
Signed-off-by: Heikki Krogerus <heikki.krogerus@...ux.intel.com>
---
drivers/usb/typec/ucsi/ucsi.c | 128 +++++++++++++++++++++++++++++++---
drivers/usb/typec/ucsi/ucsi.h | 8 +++
2 files changed, 125 insertions(+), 11 deletions(-)
diff --git a/drivers/usb/typec/ucsi/ucsi.c b/drivers/usb/typec/ucsi/ucsi.c
index f0c2fa19f3e0f..5149001093c7f 100644
--- a/drivers/usb/typec/ucsi/ucsi.c
+++ b/drivers/usb/typec/ucsi/ucsi.c
@@ -568,8 +568,8 @@ static void ucsi_unregister_altmodes(struct ucsi_connector *con, u8 recipient)
}
}
-static int ucsi_get_pdos(struct ucsi_connector *con, int is_partner,
- u32 *pdos, int offset, int num_pdos)
+static int ucsi_read_pdos(struct ucsi_connector *con, enum typec_role role, int is_partner,
+ u32 *pdos, int offset, int num_pdos)
{
struct ucsi *ucsi = con->ucsi;
u64 command;
@@ -579,7 +579,7 @@ static int ucsi_get_pdos(struct ucsi_connector *con, int is_partner,
command |= UCSI_GET_PDOS_PARTNER_PDO(is_partner);
command |= UCSI_GET_PDOS_PDO_OFFSET(offset);
command |= UCSI_GET_PDOS_NUM_PDOS(num_pdos - 1);
- command |= UCSI_GET_PDOS_SRC_PDOS;
+ command |= is_source(role) ? UCSI_GET_PDOS_SRC_PDOS : 0;
ret = ucsi_send_command(ucsi, command, pdos + offset,
num_pdos * sizeof(u32));
if (ret < 0 && ret != -ETIMEDOUT)
@@ -590,26 +590,39 @@ static int ucsi_get_pdos(struct ucsi_connector *con, int is_partner,
return ret;
}
-static int ucsi_get_src_pdos(struct ucsi_connector *con)
+static int ucsi_get_pdos(struct ucsi_connector *con, enum typec_role role,
+ int is_partner, u32 *pdos)
{
+ u8 num_pdos;
int ret;
/* UCSI max payload means only getting at most 4 PDOs at a time */
- ret = ucsi_get_pdos(con, 1, con->src_pdos, 0, UCSI_MAX_PDOS);
+ ret = ucsi_read_pdos(con, role, is_partner, pdos, 0, UCSI_MAX_PDOS);
if (ret < 0)
return ret;
- con->num_pdos = ret / sizeof(u32); /* number of bytes to 32-bit PDOs */
- if (con->num_pdos < UCSI_MAX_PDOS)
- return 0;
+ num_pdos = ret / sizeof(u32); /* number of bytes to 32-bit PDOs */
+ if (num_pdos < UCSI_MAX_PDOS)
+ return num_pdos;
/* get the remaining PDOs, if any */
- ret = ucsi_get_pdos(con, 1, con->src_pdos, UCSI_MAX_PDOS,
- PDO_MAX_OBJECTS - UCSI_MAX_PDOS);
+ ret = ucsi_read_pdos(con, role, is_partner, pdos, UCSI_MAX_PDOS,
+ PDO_MAX_OBJECTS - UCSI_MAX_PDOS);
+ if (ret < 0)
+ return ret;
+
+ return ret / sizeof(u32) + num_pdos;
+}
+
+static int ucsi_get_src_pdos(struct ucsi_connector *con)
+{
+ int ret;
+
+ ret = ucsi_get_pdos(con, TYPEC_SOURCE, 1, con->src_pdos);
if (ret < 0)
return ret;
- con->num_pdos += ret / sizeof(u32);
+ con->num_pdos += ret;
ucsi_port_psy_changed(con);
@@ -638,6 +651,60 @@ static int ucsi_check_altmodes(struct ucsi_connector *con)
return ret;
}
+static int ucsi_register_partner_pdos(struct ucsi_connector *con)
+{
+ struct pd_desc desc = { con->ucsi->cap.pd_version };
+ struct pd_capabilities *cap;
+ struct pd_caps_desc caps;
+ int ret;
+
+ con->partner_pd = typec_partner_register_pd(con->partner, &desc);
+ if (IS_ERR(con->partner_pd))
+ return PTR_ERR(con->partner_pd);
+
+ ret = ucsi_get_pdos(con, TYPEC_SOURCE, 1, caps.pdo);
+ if (ret < 0)
+ return ret;
+
+ if (ret < PDO_MAX_OBJECTS)
+ caps.pdo[ret] = 0;
+ caps.role = TYPEC_SOURCE;
+
+ cap = pd_register_capabilities(con->partner_pd, &caps);
+ if (IS_ERR(cap))
+ return PTR_ERR(cap);
+
+ ret = typec_partner_set_pd_capabilities(con->partner, cap);
+ if (ret) {
+ pd_unregister_capabilities(cap);
+ return ret;
+ }
+
+ con->partner_source_caps = cap;
+
+ ret = ucsi_get_pdos(con, TYPEC_SINK, 1, caps.pdo);
+ if (ret <= 0)
+ return ret;
+
+ if (ret < PDO_MAX_OBJECTS)
+ caps.pdo[ret] = 0;
+ caps.role = TYPEC_SINK;
+
+ cap = pd_register_capabilities(con->partner_pd, &caps);
+ if (IS_ERR(cap))
+ return PTR_ERR(cap);
+
+ ret = typec_partner_set_pd_capabilities(con->partner, cap);
+ if (ret) {
+ pd_unregister_capabilities(cap);
+ return ret;
+ }
+
+ con->partner_sink_caps = cap;
+
+ return 0;
+}
+
static void ucsi_pwr_opmode_change(struct ucsi_connector *con)
{
switch (UCSI_CONSTAT_PWR_OPMODE(con->status.flags)) {
@@ -646,6 +713,7 @@ static void ucsi_pwr_opmode_change(struct ucsi_connector *con)
typec_set_pwr_opmode(con->port, TYPEC_PWR_MODE_PD);
ucsi_partner_task(con, ucsi_get_src_pdos, 30, 0);
ucsi_partner_task(con, ucsi_check_altmodes, 30, 0);
+ ucsi_partner_task(con, ucsi_register_partner_pdos, 1, HZ);
break;
case UCSI_CONSTAT_PWR_OPMODE_TYPEC1_5:
con->rdo = 0;
@@ -704,6 +772,17 @@ static void ucsi_unregister_partner(struct ucsi_connector *con)
if (!con->partner)
return;
+ typec_partner_unset_pd_capabilities(con->partner, TYPEC_SINK);
+ pd_unregister_capabilities(con->partner_sink_caps);
+ con->partner_sink_caps = NULL;
+
+ typec_partner_unset_pd_capabilities(con->partner, TYPEC_SOURCE);
+ pd_unregister_capabilities(con->partner_source_caps);
+ con->partner_source_caps = NULL;
+
+ typec_partner_unregister_pd(con->partner);
+ con->partner_pd = NULL;
+
ucsi_unregister_altmodes(con, UCSI_RECIPIENT_SOP);
typec_unregister_partner(con->partner);
con->partner = NULL;
@@ -1037,6 +1116,8 @@ static int ucsi_register_port(struct ucsi *ucsi, int index)
u64 command;
char *name;
int ret;
+ struct pd_desc desc = { ucsi->cap.pd_version };
+ struct pd_caps_desc caps;
name = kasprintf(GFP_KERNEL, "%s-con%d", dev_name(ucsi->dev), con->num);
if (!name)
@@ -1103,6 +1184,24 @@ static int ucsi_register_port(struct ucsi *ucsi, int index)
goto out;
}
+ con->pd = typec_port_register_pd(con->port, &desc);
+
+ ret = ucsi_get_pdos(con, TYPEC_SOURCE, 0, caps.pdo);
+ if (ret > 0) {
+ caps.pdo[ret] = 0;
+ caps.role = TYPEC_SOURCE;
+ con->source_caps = pd_register_capabilities(con->pd, &caps);
+ typec_port_set_pd_capabilities(con->port, con->source_caps);
+ }
+
+ ret = ucsi_get_pdos(con, TYPEC_SINK, 0, caps.pdo);
+ if (ret > 0) {
+ caps.pdo[ret] = 0;
+ caps.role = TYPEC_SINK;
+ con->sink_caps = pd_register_capabilities(con->pd, &caps);
+ typec_port_set_pd_capabilities(con->port, con->sink_caps);
+ }
+
/* Alternate modes */
ret = ucsi_register_altmodes(con, UCSI_RECIPIENT_CON);
if (ret) {
@@ -1169,6 +1268,7 @@ static int ucsi_register_port(struct ucsi *ucsi, int index)
UCSI_CONSTAT_PWR_OPMODE_PD) {
ucsi_get_src_pdos(con);
ucsi_check_altmodes(con);
+ ucsi_register_partner_pdos(con);
}
trace_ucsi_register_port(con->num, &con->status);
@@ -1379,6 +1479,12 @@ void ucsi_unregister(struct ucsi *ucsi)
ucsi_unregister_port_psy(&ucsi->connector[i]);
if (ucsi->connector[i].wq)
destroy_workqueue(ucsi->connector[i].wq);
+ typec_port_unset_pd_capabilities(ucsi->connector[i].port,
+ ucsi->connector[i].source_caps);
+ pd_unregister_capabilities(ucsi->connector[i].source_caps);
+ typec_port_unset_pd_capabilities(ucsi->connector[i].port,
+ ucsi->connector[i].sink_caps);
+ pd_unregister_capabilities(ucsi->connector[i].sink_caps);
typec_unregister_port(ucsi->connector[i].port);
}
diff --git a/drivers/usb/typec/ucsi/ucsi.h b/drivers/usb/typec/ucsi/ucsi.h
index 280f1e1bda2c9..aa23df98b7730 100644
--- a/drivers/usb/typec/ucsi/ucsi.h
+++ b/drivers/usb/typec/ucsi/ucsi.h
@@ -335,6 +335,14 @@ struct ucsi_connector {
int num_pdos;
struct usb_role_switch *usb_role_sw;
+
+ struct pd *pd;
+ struct pd_capabilities *source_caps;
+ struct pd_capabilities *sink_caps;
+
+ struct pd *partner_pd;
+ struct pd_capabilities *partner_source_caps;
+ struct pd_capabilities *partner_sink_caps;
};
int ucsi_send_command(struct ucsi *ucsi, u64 command,
--
2.34.1
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