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platform/chrome: cros_ec_typec: Register partner PDOs

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The ChromeOS EC exports partner source/sink cap PDOs (Power Data
Objects) to the application processor (AP). Use this information
to register USB PD (Power Delivery) capabilities with the
USB Type-C Power Delivery device class.

Cc: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Signed-off-by: Prashant Malani <pmalani@chromium.org>
Reviewed-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Link: https://lore.kernel.org/r/20220830202018.1884851-1-pmalani@chromium.org
[pmalani: Remove extra newline nit from original patch]
This commit is contained in:
Prashant Malani
2022-09-07 18:02:57 +00:00
parent 20dfb74783
commit 348a2e8c93
1 changed files with 55 additions and 0 deletions
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drivers/platform/chrome/cros_ec_typec.c
+55
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@@ -73,6 +73,11 @@ struct cros_typec_port {
struct ec_response_typec_discovery *disc_data;
struct list_head partner_mode_list;
struct list_head plug_mode_list;
/* PDO-related structs */
struct usb_power_delivery *partner_pd;
struct usb_power_delivery_capabilities *partner_src_caps;
struct usb_power_delivery_capabilities *partner_sink_caps;
};
/* Platform-specific data for the Chrome OS EC Type C controller. */
@@ -253,6 +258,14 @@ static void cros_typec_remove_partner(struct cros_typec_data *typec,
cros_typec_unregister_altmodes(typec, port_num, true);
typec_partner_set_usb_power_delivery(port->partner, NULL);
usb_power_delivery_unregister_capabilities(port->partner_sink_caps);
port->partner_sink_caps = NULL;
usb_power_delivery_unregister_capabilities(port->partner_src_caps);
port->partner_src_caps = NULL;
usb_power_delivery_unregister(port->partner_pd);
port->partner_pd = NULL;
cros_typec_usb_disconnect_state(port);
port->mux_flags = USB_PD_MUX_NONE;
@@ -939,6 +952,46 @@ static int cros_typec_send_clear_event(struct cros_typec_data *typec, int port_n
sizeof(req), NULL, 0);
}
static void cros_typec_register_partner_pdos(struct cros_typec_data *typec,
struct ec_response_typec_status *resp, int port_num)
{
struct usb_power_delivery_capabilities_desc caps_desc = {};
struct usb_power_delivery_desc desc = {
.revision = (le16_to_cpu(resp->sop_revision) & 0xff00) >> 4,
};
struct cros_typec_port *port = typec->ports[port_num];
if (!port->partner || port->partner_pd)
return;
/* If no caps are available, don't bother creating a device. */
if (!resp->source_cap_count && !resp->sink_cap_count)
return;
port->partner_pd = usb_power_delivery_register(NULL, &desc);
if (IS_ERR(port->partner_pd)) {
dev_warn(typec->dev, "Failed to register partner PD device, port: %d\n", port_num);
return;
}
typec_partner_set_usb_power_delivery(port->partner, port->partner_pd);
memcpy(caps_desc.pdo, resp->source_cap_pdos, sizeof(u32) * resp->source_cap_count);
caps_desc.role = TYPEC_SOURCE;
port->partner_src_caps = usb_power_delivery_register_capabilities(port->partner_pd,
&caps_desc);
if (IS_ERR(port->partner_src_caps))
dev_warn(typec->dev, "Failed to register source caps, port: %d\n", port_num);
memset(&caps_desc, 0, sizeof(caps_desc));
memcpy(caps_desc.pdo, resp->sink_cap_pdos, sizeof(u32) * resp->sink_cap_count);
caps_desc.role = TYPEC_SINK;
port->partner_sink_caps = usb_power_delivery_register_capabilities(port->partner_pd,
&caps_desc);
if (IS_ERR(port->partner_sink_caps))
dev_warn(typec->dev, "Failed to register sink caps, port: %d\n", port_num);
}
static void cros_typec_handle_status(struct cros_typec_data *typec, int port_num)
{
struct ec_response_typec_status resp;
@@ -986,6 +1039,8 @@ static void cros_typec_handle_status(struct cros_typec_data *typec, int port_num
}
if (resp.sop_connected)
typec_set_pwr_opmode(typec->ports[port_num]->port, TYPEC_PWR_MODE_PD);
cros_typec_register_partner_pdos(typec, &resp, port_num);
}
if (resp.events & PD_STATUS_EVENT_SOP_PRIME_DISC_DONE &&