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platform/chrome: cros_ec_typec: Introduce TYPEC_STATUS 

Make a call to the newly introduced EC_CMD_TYPEC_STATUS command.
Currently we just check to see if the SOP (port-partner) discovery was
done and emit a debug level print for it.

Subsequent patches will retrieve and parse the discovery data and fill
out the Type C connector class data structures.

Also check the EC_FEATURE_TYPEC_CMD feature flag at probe, and only call
the new TYPEC_STATUS command if the feature flag is supported.

Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Prashant Malani <pmalani@chromium.org>
Signed-off-by: Enric Balletbo i Serra <enric.balletbo@collabora.com>
Link: https://lore.kernel.org/r/20201029222738.482366-6-pmalani@chromium.org
This commit is contained in:
Prashant Malani 2020-10-29 15:27:38 -07:00 committed by Enric Balletbo i Serra
parent cd2c40ff90
commit 80f8cef60d
1 changed files with 52 additions and 0 deletions
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52
drivers/platform/chrome/cros_ec_typec.c
View File

@ -48,6 +48,9 @@ struct cros_typec_port {
/* Port alt modes. */
struct typec_altmode p_altmode[CROS_EC_ALTMODE_MAX];
/* Flag indicating that PD discovery data parsing is completed. */
bool disc_done;
};
/* Platform-specific data for the Chrome OS EC Type C controller. */
@ -60,6 +63,7 @@ struct cros_typec_data {
struct cros_typec_port *ports[EC_USB_PD_MAX_PORTS];
struct notifier_block nb;
struct work_struct port_work;
bool typec_cmd_supported;
};
static int cros_typec_parse_port_props(struct typec_capability *cap,
@ -182,6 +186,7 @@ static void cros_typec_remove_partner(struct cros_typec_data *typec,
typec_unregister_partner(port->partner);
port->partner = NULL;
memset(&port->p_identity, 0, sizeof(port->p_identity));
port->disc_done = false;
}
static void cros_unregister_ports(struct cros_typec_data *typec)
@ -577,6 +582,31 @@ static int cros_typec_get_mux_info(struct cros_typec_data *typec, int port_num,
sizeof(req), resp, sizeof(*resp));
}
static void cros_typec_handle_status(struct cros_typec_data *typec, int port_num)
{
struct ec_response_typec_status resp;
struct ec_params_typec_status req = {
.port = port_num,
};
int ret;
ret = cros_typec_ec_command(typec, 0, EC_CMD_TYPEC_STATUS, &req, sizeof(req),
&resp, sizeof(resp));
if (ret < 0) {
dev_warn(typec->dev, "EC_CMD_TYPEC_STATUS failed for port: %d\n", port_num);
return;
}
if (typec->ports[port_num]->disc_done)
return;
/* Handle any events appropriately. */
if (resp.events & PD_STATUS_EVENT_SOP_DISC_DONE) {
dev_dbg(typec->dev, "SOP Discovery done for port: %d\n", port_num);
typec->ports[port_num]->disc_done = true;
}
}
static int cros_typec_port_update(struct cros_typec_data *typec, int port_num)
{
struct ec_params_usb_pd_control req;
@ -613,6 +643,9 @@ static int cros_typec_port_update(struct cros_typec_data *typec, int port_num)
cros_typec_set_port_params_v0(typec, port_num,
(struct ec_response_usb_pd_control *) &resp);
if (typec->typec_cmd_supported)
cros_typec_handle_status(typec, port_num);
/* Update the switches if they exist, according to requested state */
ret = cros_typec_get_mux_info(typec, port_num, &mux_resp);
if (ret < 0) {
@ -661,6 +694,23 @@ static int cros_typec_get_cmd_version(struct cros_typec_data *typec)
return 0;
}
/* Check the EC feature flags to see if TYPEC_* commands are supported. */
static int cros_typec_cmds_supported(struct cros_typec_data *typec)
{
struct ec_response_get_features resp = {};
int ret;
ret = cros_typec_ec_command(typec, 0, EC_CMD_GET_FEATURES, NULL, 0,
&resp, sizeof(resp));
if (ret < 0) {
dev_warn(typec->dev,
"Failed to get features, assuming typec commands unsupported.\n");
return 0;
}
return resp.flags[EC_FEATURE_TYPEC_CMD / 32] & EC_FEATURE_MASK_1(EC_FEATURE_TYPEC_CMD);
}
static void cros_typec_port_work(struct work_struct *work)
{
struct cros_typec_data *typec = container_of(work, struct cros_typec_data, port_work);
@ -720,6 +770,8 @@ static int cros_typec_probe(struct platform_device *pdev)
return ret;
}
typec->typec_cmd_supported = !!cros_typec_cmds_supported(typec);
ret = cros_typec_ec_command(typec, 0, EC_CMD_USB_PD_PORTS, NULL, 0,
&resp, sizeof(resp));
if (ret < 0)