// SPDX-License-Identifier: GPL-2.0
|
/*
|
* USB Type-C Connector System Software Interface driver
|
*
|
* Copyright (C) 2017, Intel Corporation
|
* Author: Heikki Krogerus <heikki.krogerus@linux.intel.com>
|
*/
|
|
#include <linux/completion.h>
|
#include <linux/property.h>
|
#include <linux/device.h>
|
#include <linux/module.h>
|
#include <linux/delay.h>
|
#include <linux/slab.h>
|
#include <linux/usb/typec.h>
|
|
#include "ucsi.h"
|
#include "trace.h"
|
|
#define to_ucsi_connector(_cap_) container_of(_cap_, struct ucsi_connector, \
|
typec_cap)
|
|
/*
|
* UCSI_TIMEOUT_MS - PPM communication timeout
|
*
|
* Ideally we could use MIN_TIME_TO_RESPOND_WITH_BUSY (which is defined in UCSI
|
* specification) here as reference, but unfortunately we can't. It is very
|
* difficult to estimate the time it takes for the system to process the command
|
* before it is actually passed to the PPM.
|
*/
|
#define UCSI_TIMEOUT_MS 5000
|
|
/*
|
* UCSI_SWAP_TIMEOUT_MS - Timeout for role swap requests
|
*
|
* 5 seconds is close to the time it takes for CapsCounter to reach 0, so even
|
* if the PPM does not generate Connector Change events before that with
|
* partners that do not support USB Power Delivery, this should still work.
|
*/
|
#define UCSI_SWAP_TIMEOUT_MS 5000
|
|
enum ucsi_status {
|
UCSI_IDLE = 0,
|
UCSI_BUSY,
|
UCSI_ERROR,
|
};
|
|
struct ucsi_connector {
|
int num;
|
|
struct ucsi *ucsi;
|
struct work_struct work;
|
struct completion complete;
|
|
struct typec_port *port;
|
struct typec_partner *partner;
|
|
struct typec_capability typec_cap;
|
|
struct ucsi_connector_status status;
|
struct ucsi_connector_capability cap;
|
};
|
|
struct ucsi {
|
struct device *dev;
|
struct ucsi_ppm *ppm;
|
|
enum ucsi_status status;
|
struct completion complete;
|
struct ucsi_capability cap;
|
struct ucsi_connector *connector;
|
|
struct work_struct work;
|
|
/* PPM Communication lock */
|
struct mutex ppm_lock;
|
|
/* PPM communication flags */
|
unsigned long flags;
|
#define EVENT_PENDING 0
|
#define COMMAND_PENDING 1
|
#define ACK_PENDING 2
|
};
|
|
static inline int ucsi_sync(struct ucsi *ucsi)
|
{
|
if (ucsi->ppm && ucsi->ppm->sync)
|
return ucsi->ppm->sync(ucsi->ppm);
|
return 0;
|
}
|
|
static int ucsi_command(struct ucsi *ucsi, struct ucsi_control *ctrl)
|
{
|
int ret;
|
|
trace_ucsi_command(ctrl);
|
|
set_bit(COMMAND_PENDING, &ucsi->flags);
|
|
ret = ucsi->ppm->cmd(ucsi->ppm, ctrl);
|
if (ret)
|
goto err_clear_flag;
|
|
if (!wait_for_completion_timeout(&ucsi->complete,
|
msecs_to_jiffies(UCSI_TIMEOUT_MS))) {
|
dev_warn(ucsi->dev, "PPM NOT RESPONDING\n");
|
ret = -ETIMEDOUT;
|
}
|
|
err_clear_flag:
|
clear_bit(COMMAND_PENDING, &ucsi->flags);
|
|
return ret;
|
}
|
|
static int ucsi_ack(struct ucsi *ucsi, u8 ack)
|
{
|
struct ucsi_control ctrl;
|
int ret;
|
|
trace_ucsi_ack(ack);
|
|
set_bit(ACK_PENDING, &ucsi->flags);
|
|
UCSI_CMD_ACK(ctrl, ack);
|
ret = ucsi->ppm->cmd(ucsi->ppm, &ctrl);
|
if (ret)
|
goto out_clear_bit;
|
|
/* Waiting for ACK with ACK CMD, but not with EVENT for now */
|
if (ack == UCSI_ACK_EVENT)
|
goto out_clear_bit;
|
|
if (!wait_for_completion_timeout(&ucsi->complete,
|
msecs_to_jiffies(UCSI_TIMEOUT_MS)))
|
ret = -ETIMEDOUT;
|
|
out_clear_bit:
|
clear_bit(ACK_PENDING, &ucsi->flags);
|
|
if (ret)
|
dev_err(ucsi->dev, "%s: failed\n", __func__);
|
|
return ret;
|
}
|
|
static int ucsi_run_command(struct ucsi *ucsi, struct ucsi_control *ctrl,
|
void *data, size_t size)
|
{
|
struct ucsi_control _ctrl;
|
u8 data_length;
|
u16 error;
|
int ret;
|
|
ret = ucsi_command(ucsi, ctrl);
|
if (ret)
|
goto err;
|
|
switch (ucsi->status) {
|
case UCSI_IDLE:
|
ret = ucsi_sync(ucsi);
|
if (ret)
|
dev_warn(ucsi->dev, "%s: sync failed\n", __func__);
|
|
if (data)
|
memcpy(data, ucsi->ppm->data->message_in, size);
|
|
data_length = ucsi->ppm->data->cci.data_length;
|
|
ret = ucsi_ack(ucsi, UCSI_ACK_CMD);
|
if (!ret)
|
ret = data_length;
|
break;
|
case UCSI_BUSY:
|
/* The caller decides whether to cancel or not */
|
ret = -EBUSY;
|
break;
|
case UCSI_ERROR:
|
ret = ucsi_ack(ucsi, UCSI_ACK_CMD);
|
if (ret)
|
break;
|
|
_ctrl.raw_cmd = 0;
|
_ctrl.cmd.cmd = UCSI_GET_ERROR_STATUS;
|
ret = ucsi_command(ucsi, &_ctrl);
|
if (ret) {
|
dev_err(ucsi->dev, "reading error failed!\n");
|
break;
|
}
|
|
memcpy(&error, ucsi->ppm->data->message_in, sizeof(error));
|
|
/* Something has really gone wrong */
|
if (WARN_ON(ucsi->status == UCSI_ERROR)) {
|
ret = -ENODEV;
|
break;
|
}
|
|
ret = ucsi_ack(ucsi, UCSI_ACK_CMD);
|
if (ret)
|
break;
|
|
switch (error) {
|
case UCSI_ERROR_INCOMPATIBLE_PARTNER:
|
ret = -EOPNOTSUPP;
|
break;
|
case UCSI_ERROR_CC_COMMUNICATION_ERR:
|
ret = -ECOMM;
|
break;
|
case UCSI_ERROR_CONTRACT_NEGOTIATION_FAIL:
|
ret = -EPROTO;
|
break;
|
case UCSI_ERROR_DEAD_BATTERY:
|
dev_warn(ucsi->dev, "Dead battery condition!\n");
|
ret = -EPERM;
|
break;
|
/* The following mean a bug in this driver */
|
case UCSI_ERROR_INVALID_CON_NUM:
|
case UCSI_ERROR_UNREGONIZED_CMD:
|
case UCSI_ERROR_INVALID_CMD_ARGUMENT:
|
dev_warn(ucsi->dev,
|
"%s: possible UCSI driver bug - error 0x%x\n",
|
__func__, error);
|
ret = -EINVAL;
|
break;
|
default:
|
dev_warn(ucsi->dev,
|
"%s: error without status\n", __func__);
|
ret = -EIO;
|
break;
|
}
|
break;
|
}
|
|
err:
|
trace_ucsi_run_command(ctrl, ret);
|
|
return ret;
|
}
|
|
/* -------------------------------------------------------------------------- */
|
|
static void ucsi_pwr_opmode_change(struct ucsi_connector *con)
|
{
|
switch (con->status.pwr_op_mode) {
|
case UCSI_CONSTAT_PWR_OPMODE_PD:
|
typec_set_pwr_opmode(con->port, TYPEC_PWR_MODE_PD);
|
break;
|
case UCSI_CONSTAT_PWR_OPMODE_TYPEC1_5:
|
typec_set_pwr_opmode(con->port, TYPEC_PWR_MODE_1_5A);
|
break;
|
case UCSI_CONSTAT_PWR_OPMODE_TYPEC3_0:
|
typec_set_pwr_opmode(con->port, TYPEC_PWR_MODE_3_0A);
|
break;
|
default:
|
typec_set_pwr_opmode(con->port, TYPEC_PWR_MODE_USB);
|
break;
|
}
|
}
|
|
static int ucsi_register_partner(struct ucsi_connector *con)
|
{
|
struct typec_partner_desc desc;
|
struct typec_partner *partner;
|
|
if (con->partner)
|
return 0;
|
|
memset(&desc, 0, sizeof(desc));
|
|
switch (con->status.partner_type) {
|
case UCSI_CONSTAT_PARTNER_TYPE_DEBUG:
|
desc.accessory = TYPEC_ACCESSORY_DEBUG;
|
break;
|
case UCSI_CONSTAT_PARTNER_TYPE_AUDIO:
|
desc.accessory = TYPEC_ACCESSORY_AUDIO;
|
break;
|
default:
|
break;
|
}
|
|
desc.usb_pd = con->status.pwr_op_mode == UCSI_CONSTAT_PWR_OPMODE_PD;
|
|
partner = typec_register_partner(con->port, &desc);
|
if (IS_ERR(partner)) {
|
dev_err(con->ucsi->dev,
|
"con%d: failed to register partner (%ld)\n", con->num,
|
PTR_ERR(partner));
|
return PTR_ERR(partner);
|
}
|
|
con->partner = partner;
|
|
return 0;
|
}
|
|
static void ucsi_unregister_partner(struct ucsi_connector *con)
|
{
|
if (!con->partner)
|
return;
|
|
typec_unregister_partner(con->partner);
|
con->partner = NULL;
|
}
|
|
static void ucsi_connector_change(struct work_struct *work)
|
{
|
struct ucsi_connector *con = container_of(work, struct ucsi_connector,
|
work);
|
struct ucsi *ucsi = con->ucsi;
|
struct ucsi_control ctrl;
|
int ret;
|
|
mutex_lock(&ucsi->ppm_lock);
|
|
UCSI_CMD_GET_CONNECTOR_STATUS(ctrl, con->num);
|
ret = ucsi_run_command(ucsi, &ctrl, &con->status, sizeof(con->status));
|
if (ret < 0) {
|
dev_err(ucsi->dev, "%s: GET_CONNECTOR_STATUS failed (%d)\n",
|
__func__, ret);
|
goto out_unlock;
|
}
|
|
if (con->status.change & UCSI_CONSTAT_POWER_OPMODE_CHANGE)
|
ucsi_pwr_opmode_change(con);
|
|
if (con->status.change & UCSI_CONSTAT_POWER_DIR_CHANGE) {
|
typec_set_pwr_role(con->port, con->status.pwr_dir);
|
|
/* Complete pending power role swap */
|
if (!completion_done(&con->complete))
|
complete(&con->complete);
|
}
|
|
if (con->status.change & UCSI_CONSTAT_PARTNER_CHANGE) {
|
switch (con->status.partner_type) {
|
case UCSI_CONSTAT_PARTNER_TYPE_UFP:
|
typec_set_data_role(con->port, TYPEC_HOST);
|
break;
|
case UCSI_CONSTAT_PARTNER_TYPE_DFP:
|
typec_set_data_role(con->port, TYPEC_DEVICE);
|
break;
|
default:
|
break;
|
}
|
|
/* Complete pending data role swap */
|
if (!completion_done(&con->complete))
|
complete(&con->complete);
|
}
|
|
if (con->status.change & UCSI_CONSTAT_CONNECT_CHANGE) {
|
typec_set_pwr_role(con->port, con->status.pwr_dir);
|
|
switch (con->status.partner_type) {
|
case UCSI_CONSTAT_PARTNER_TYPE_UFP:
|
typec_set_data_role(con->port, TYPEC_HOST);
|
break;
|
case UCSI_CONSTAT_PARTNER_TYPE_DFP:
|
typec_set_data_role(con->port, TYPEC_DEVICE);
|
break;
|
default:
|
break;
|
}
|
|
if (con->status.connected)
|
ucsi_register_partner(con);
|
else
|
ucsi_unregister_partner(con);
|
}
|
|
ret = ucsi_ack(ucsi, UCSI_ACK_EVENT);
|
if (ret)
|
dev_err(ucsi->dev, "%s: ACK failed (%d)", __func__, ret);
|
|
trace_ucsi_connector_change(con->num, &con->status);
|
|
out_unlock:
|
clear_bit(EVENT_PENDING, &ucsi->flags);
|
mutex_unlock(&ucsi->ppm_lock);
|
}
|
|
/**
|
* ucsi_notify - PPM notification handler
|
* @ucsi: Source UCSI Interface for the notifications
|
*
|
* Handle notifications from PPM of @ucsi.
|
*/
|
void ucsi_notify(struct ucsi *ucsi)
|
{
|
struct ucsi_cci *cci;
|
|
/* There is no requirement to sync here, but no harm either. */
|
ucsi_sync(ucsi);
|
|
cci = &ucsi->ppm->data->cci;
|
|
if (cci->error)
|
ucsi->status = UCSI_ERROR;
|
else if (cci->busy)
|
ucsi->status = UCSI_BUSY;
|
else
|
ucsi->status = UCSI_IDLE;
|
|
if (cci->cmd_complete && test_bit(COMMAND_PENDING, &ucsi->flags)) {
|
complete(&ucsi->complete);
|
} else if (cci->ack_complete && test_bit(ACK_PENDING, &ucsi->flags)) {
|
complete(&ucsi->complete);
|
} else if (cci->connector_change) {
|
struct ucsi_connector *con;
|
|
con = &ucsi->connector[cci->connector_change - 1];
|
|
if (!test_and_set_bit(EVENT_PENDING, &ucsi->flags))
|
schedule_work(&con->work);
|
}
|
|
trace_ucsi_notify(ucsi->ppm->data->raw_cci);
|
}
|
EXPORT_SYMBOL_GPL(ucsi_notify);
|
|
/* -------------------------------------------------------------------------- */
|
|
static int ucsi_reset_connector(struct ucsi_connector *con, bool hard)
|
{
|
struct ucsi_control ctrl;
|
|
UCSI_CMD_CONNECTOR_RESET(ctrl, con, hard);
|
|
return ucsi_run_command(con->ucsi, &ctrl, NULL, 0);
|
}
|
|
static int ucsi_reset_ppm(struct ucsi *ucsi)
|
{
|
struct ucsi_control ctrl;
|
unsigned long tmo;
|
int ret;
|
|
ctrl.raw_cmd = 0;
|
ctrl.cmd.cmd = UCSI_PPM_RESET;
|
trace_ucsi_command(&ctrl);
|
ret = ucsi->ppm->cmd(ucsi->ppm, &ctrl);
|
if (ret)
|
goto err;
|
|
tmo = jiffies + msecs_to_jiffies(UCSI_TIMEOUT_MS);
|
|
do {
|
/* Here sync is critical. */
|
ret = ucsi_sync(ucsi);
|
if (ret)
|
goto err;
|
|
if (ucsi->ppm->data->cci.reset_complete)
|
break;
|
|
/* If the PPM is still doing something else, reset it again. */
|
if (ucsi->ppm->data->raw_cci) {
|
dev_warn_ratelimited(ucsi->dev,
|
"Failed to reset PPM! Trying again..\n");
|
|
trace_ucsi_command(&ctrl);
|
ret = ucsi->ppm->cmd(ucsi->ppm, &ctrl);
|
if (ret)
|
goto err;
|
}
|
|
/* Letting the PPM settle down. */
|
msleep(20);
|
|
ret = -ETIMEDOUT;
|
} while (time_is_after_jiffies(tmo));
|
|
err:
|
trace_ucsi_reset_ppm(&ctrl, ret);
|
|
return ret;
|
}
|
|
static int ucsi_role_cmd(struct ucsi_connector *con, struct ucsi_control *ctrl)
|
{
|
int ret;
|
|
ret = ucsi_run_command(con->ucsi, ctrl, NULL, 0);
|
if (ret == -ETIMEDOUT) {
|
struct ucsi_control c;
|
|
/* PPM most likely stopped responding. Resetting everything. */
|
ucsi_reset_ppm(con->ucsi);
|
|
UCSI_CMD_SET_NTFY_ENABLE(c, UCSI_ENABLE_NTFY_ALL);
|
ucsi_run_command(con->ucsi, &c, NULL, 0);
|
|
ucsi_reset_connector(con, true);
|
}
|
|
return ret;
|
}
|
|
static int
|
ucsi_dr_swap(const struct typec_capability *cap, enum typec_data_role role)
|
{
|
struct ucsi_connector *con = to_ucsi_connector(cap);
|
struct ucsi_control ctrl;
|
int ret = 0;
|
|
if (!con->partner)
|
return -ENOTCONN;
|
|
mutex_lock(&con->ucsi->ppm_lock);
|
|
if ((con->status.partner_type == UCSI_CONSTAT_PARTNER_TYPE_DFP &&
|
role == TYPEC_DEVICE) ||
|
(con->status.partner_type == UCSI_CONSTAT_PARTNER_TYPE_UFP &&
|
role == TYPEC_HOST))
|
goto out_unlock;
|
|
UCSI_CMD_SET_UOR(ctrl, con, role);
|
ret = ucsi_role_cmd(con, &ctrl);
|
if (ret < 0)
|
goto out_unlock;
|
|
mutex_unlock(&con->ucsi->ppm_lock);
|
|
if (!wait_for_completion_timeout(&con->complete,
|
msecs_to_jiffies(UCSI_SWAP_TIMEOUT_MS)))
|
return -ETIMEDOUT;
|
|
return 0;
|
|
out_unlock:
|
mutex_unlock(&con->ucsi->ppm_lock);
|
|
return ret;
|
}
|
|
static int
|
ucsi_pr_swap(const struct typec_capability *cap, enum typec_role role)
|
{
|
struct ucsi_connector *con = to_ucsi_connector(cap);
|
struct ucsi_control ctrl;
|
int ret = 0;
|
|
if (!con->partner)
|
return -ENOTCONN;
|
|
mutex_lock(&con->ucsi->ppm_lock);
|
|
if (con->status.pwr_dir == role)
|
goto out_unlock;
|
|
UCSI_CMD_SET_PDR(ctrl, con, role);
|
ret = ucsi_role_cmd(con, &ctrl);
|
if (ret < 0)
|
goto out_unlock;
|
|
mutex_unlock(&con->ucsi->ppm_lock);
|
|
if (!wait_for_completion_timeout(&con->complete,
|
msecs_to_jiffies(UCSI_SWAP_TIMEOUT_MS)))
|
return -ETIMEDOUT;
|
|
mutex_lock(&con->ucsi->ppm_lock);
|
|
/* Something has gone wrong while swapping the role */
|
if (con->status.pwr_op_mode != UCSI_CONSTAT_PWR_OPMODE_PD) {
|
ucsi_reset_connector(con, true);
|
ret = -EPROTO;
|
}
|
|
out_unlock:
|
mutex_unlock(&con->ucsi->ppm_lock);
|
|
return ret;
|
}
|
|
static struct fwnode_handle *ucsi_find_fwnode(struct ucsi_connector *con)
|
{
|
struct fwnode_handle *fwnode;
|
int i = 1;
|
|
device_for_each_child_node(con->ucsi->dev, fwnode)
|
if (i++ == con->num)
|
return fwnode;
|
return NULL;
|
}
|
|
static int ucsi_register_port(struct ucsi *ucsi, int index)
|
{
|
struct ucsi_connector *con = &ucsi->connector[index];
|
struct typec_capability *cap = &con->typec_cap;
|
enum typec_accessory *accessory = cap->accessory;
|
struct ucsi_control ctrl;
|
int ret;
|
|
INIT_WORK(&con->work, ucsi_connector_change);
|
init_completion(&con->complete);
|
con->num = index + 1;
|
con->ucsi = ucsi;
|
|
/* Get connector capability */
|
UCSI_CMD_GET_CONNECTOR_CAPABILITY(ctrl, con->num);
|
ret = ucsi_run_command(ucsi, &ctrl, &con->cap, sizeof(con->cap));
|
if (ret < 0)
|
return ret;
|
|
if (con->cap.op_mode & UCSI_CONCAP_OPMODE_DRP)
|
cap->data = TYPEC_PORT_DRD;
|
else if (con->cap.op_mode & UCSI_CONCAP_OPMODE_DFP)
|
cap->data = TYPEC_PORT_DFP;
|
else if (con->cap.op_mode & UCSI_CONCAP_OPMODE_UFP)
|
cap->data = TYPEC_PORT_UFP;
|
|
if (con->cap.provider && con->cap.consumer)
|
cap->type = TYPEC_PORT_DRP;
|
else if (con->cap.provider)
|
cap->type = TYPEC_PORT_SRC;
|
else if (con->cap.consumer)
|
cap->type = TYPEC_PORT_SNK;
|
|
cap->revision = ucsi->cap.typec_version;
|
cap->pd_revision = ucsi->cap.pd_version;
|
cap->prefer_role = TYPEC_NO_PREFERRED_ROLE;
|
|
if (con->cap.op_mode & UCSI_CONCAP_OPMODE_AUDIO_ACCESSORY)
|
*accessory++ = TYPEC_ACCESSORY_AUDIO;
|
if (con->cap.op_mode & UCSI_CONCAP_OPMODE_DEBUG_ACCESSORY)
|
*accessory = TYPEC_ACCESSORY_DEBUG;
|
|
cap->fwnode = ucsi_find_fwnode(con);
|
cap->dr_set = ucsi_dr_swap;
|
cap->pr_set = ucsi_pr_swap;
|
|
/* Register the connector */
|
con->port = typec_register_port(ucsi->dev, cap);
|
if (IS_ERR(con->port))
|
return PTR_ERR(con->port);
|
|
/* Get the status */
|
UCSI_CMD_GET_CONNECTOR_STATUS(ctrl, con->num);
|
ret = ucsi_run_command(ucsi, &ctrl, &con->status, sizeof(con->status));
|
if (ret < 0) {
|
dev_err(ucsi->dev, "con%d: failed to get status\n", con->num);
|
return 0;
|
}
|
|
ucsi_pwr_opmode_change(con);
|
typec_set_pwr_role(con->port, con->status.pwr_dir);
|
|
switch (con->status.partner_type) {
|
case UCSI_CONSTAT_PARTNER_TYPE_UFP:
|
typec_set_data_role(con->port, TYPEC_HOST);
|
break;
|
case UCSI_CONSTAT_PARTNER_TYPE_DFP:
|
typec_set_data_role(con->port, TYPEC_DEVICE);
|
break;
|
default:
|
break;
|
}
|
|
/* Check if there is already something connected */
|
if (con->status.connected)
|
ucsi_register_partner(con);
|
|
trace_ucsi_register_port(con->num, &con->status);
|
|
return 0;
|
}
|
|
static void ucsi_init(struct work_struct *work)
|
{
|
struct ucsi *ucsi = container_of(work, struct ucsi, work);
|
struct ucsi_connector *con;
|
struct ucsi_control ctrl;
|
int ret;
|
int i;
|
|
mutex_lock(&ucsi->ppm_lock);
|
|
/* Reset the PPM */
|
ret = ucsi_reset_ppm(ucsi);
|
if (ret) {
|
dev_err(ucsi->dev, "failed to reset PPM!\n");
|
goto err;
|
}
|
|
/* Enable basic notifications */
|
UCSI_CMD_SET_NTFY_ENABLE(ctrl, UCSI_ENABLE_NTFY_CMD_COMPLETE |
|
UCSI_ENABLE_NTFY_ERROR);
|
ret = ucsi_run_command(ucsi, &ctrl, NULL, 0);
|
if (ret < 0)
|
goto err_reset;
|
|
/* Get PPM capabilities */
|
UCSI_CMD_GET_CAPABILITY(ctrl);
|
ret = ucsi_run_command(ucsi, &ctrl, &ucsi->cap, sizeof(ucsi->cap));
|
if (ret < 0)
|
goto err_reset;
|
|
if (!ucsi->cap.num_connectors) {
|
ret = -ENODEV;
|
goto err_reset;
|
}
|
|
/* Allocate the connectors. Released in ucsi_unregister_ppm() */
|
ucsi->connector = kcalloc(ucsi->cap.num_connectors + 1,
|
sizeof(*ucsi->connector), GFP_KERNEL);
|
if (!ucsi->connector) {
|
ret = -ENOMEM;
|
goto err_reset;
|
}
|
|
/* Register all connectors */
|
for (i = 0; i < ucsi->cap.num_connectors; i++) {
|
ret = ucsi_register_port(ucsi, i);
|
if (ret)
|
goto err_unregister;
|
}
|
|
/* Enable all notifications */
|
UCSI_CMD_SET_NTFY_ENABLE(ctrl, UCSI_ENABLE_NTFY_ALL);
|
ret = ucsi_run_command(ucsi, &ctrl, NULL, 0);
|
if (ret < 0)
|
goto err_unregister;
|
|
mutex_unlock(&ucsi->ppm_lock);
|
|
return;
|
|
err_unregister:
|
for (con = ucsi->connector; con->port; con++) {
|
ucsi_unregister_partner(con);
|
typec_unregister_port(con->port);
|
con->port = NULL;
|
}
|
|
err_reset:
|
memset(&ucsi->cap, 0, sizeof(ucsi->cap));
|
ucsi_reset_ppm(ucsi);
|
err:
|
mutex_unlock(&ucsi->ppm_lock);
|
dev_err(ucsi->dev, "PPM init failed (%d)\n", ret);
|
}
|
|
/**
|
* ucsi_register_ppm - Register UCSI PPM Interface
|
* @dev: Device interface to the PPM
|
* @ppm: The PPM interface
|
*
|
* Allocates UCSI instance, associates it with @ppm and returns it to the
|
* caller, and schedules initialization of the interface.
|
*/
|
struct ucsi *ucsi_register_ppm(struct device *dev, struct ucsi_ppm *ppm)
|
{
|
struct ucsi *ucsi;
|
|
ucsi = kzalloc(sizeof(*ucsi), GFP_KERNEL);
|
if (!ucsi)
|
return ERR_PTR(-ENOMEM);
|
|
INIT_WORK(&ucsi->work, ucsi_init);
|
init_completion(&ucsi->complete);
|
mutex_init(&ucsi->ppm_lock);
|
|
ucsi->dev = dev;
|
ucsi->ppm = ppm;
|
|
/*
|
* Communication with the PPM takes a lot of time. It is not reasonable
|
* to initialize the driver here. Using a work for now.
|
*/
|
queue_work(system_long_wq, &ucsi->work);
|
|
return ucsi;
|
}
|
EXPORT_SYMBOL_GPL(ucsi_register_ppm);
|
|
/**
|
* ucsi_unregister_ppm - Unregister UCSI PPM Interface
|
* @ucsi: struct ucsi associated with the PPM
|
*
|
* Unregister UCSI PPM that was created with ucsi_register().
|
*/
|
void ucsi_unregister_ppm(struct ucsi *ucsi)
|
{
|
struct ucsi_control ctrl;
|
int i;
|
|
/* Make sure that we are not in the middle of driver initialization */
|
cancel_work_sync(&ucsi->work);
|
|
mutex_lock(&ucsi->ppm_lock);
|
|
/* Disable everything except command complete notification */
|
UCSI_CMD_SET_NTFY_ENABLE(ctrl, UCSI_ENABLE_NTFY_CMD_COMPLETE)
|
ucsi_run_command(ucsi, &ctrl, NULL, 0);
|
|
mutex_unlock(&ucsi->ppm_lock);
|
|
for (i = 0; i < ucsi->cap.num_connectors; i++) {
|
cancel_work_sync(&ucsi->connector[i].work);
|
ucsi_unregister_partner(&ucsi->connector[i]);
|
typec_unregister_port(ucsi->connector[i].port);
|
}
|
|
ucsi_reset_ppm(ucsi);
|
|
kfree(ucsi->connector);
|
kfree(ucsi);
|
}
|
EXPORT_SYMBOL_GPL(ucsi_unregister_ppm);
|
|
MODULE_AUTHOR("Heikki Krogerus <heikki.krogerus@linux.intel.com>");
|
MODULE_LICENSE("GPL v2");
|
MODULE_DESCRIPTION("USB Type-C Connector System Software Interface driver");
|
