diff options
author | Prashant Malani <pmalani@chromium.org> | 2022-08-30 23:20:18 +0300 |
---|---|---|
committer | Prashant Malani <pmalani@chromium.org> | 2022-09-07 21:02:57 +0300 |
commit | 348a2e8c93d3ca622cf1b293cd2f597c9db74d9d (patch) | |
tree | 6681ed6aef2f9dd8c73e1ccdd9d9cbcd216fa74b /drivers/platform/chrome | |
parent | 20dfb74783093e863228d511f7e6a8db8ee39e18 (diff) | |
download | linux-348a2e8c93d3ca622cf1b293cd2f597c9db74d9d.tar.xz |
platform/chrome: cros_ec_typec: Register partner PDOs
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]
Diffstat (limited to 'drivers/platform/chrome')
-rw-r--r-- | drivers/platform/chrome/cros_ec_typec.c | 55 |
1 files changed, 55 insertions, 0 deletions
diff --git a/drivers/platform/chrome/cros_ec_typec.c b/drivers/platform/chrome/cros_ec_typec.c index 00208ffbe2e7..2a7ff14dc37e 100644 --- a/drivers/platform/chrome/cros_ec_typec.c +++ b/drivers/platform/chrome/cros_ec_typec.c @@ -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 && |