// 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_dp.h>
|
|
#include "ucsi.h"
|
#include "trace.h"
|
|
/*
|
* 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
|
|
static int ucsi_acknowledge_command(struct ucsi *ucsi)
|
{
|
u64 ctrl;
|
|
ctrl = UCSI_ACK_CC_CI;
|
ctrl |= UCSI_ACK_COMMAND_COMPLETE;
|
|
return ucsi->ops->sync_write(ucsi, UCSI_CONTROL, &ctrl, sizeof(ctrl));
|
}
|
|
static int ucsi_acknowledge_connector_change(struct ucsi *ucsi)
|
{
|
u64 ctrl;
|
|
ctrl = UCSI_ACK_CC_CI;
|
ctrl |= UCSI_ACK_CONNECTOR_CHANGE;
|
|
return ucsi->ops->sync_write(ucsi, UCSI_CONTROL, &ctrl, sizeof(ctrl));
|
}
|
|
static int ucsi_exec_command(struct ucsi *ucsi, u64 command);
|
|
static int ucsi_read_error(struct ucsi *ucsi)
|
{
|
u16 error;
|
int ret;
|
|
/* Acknowlege the command that failed */
|
ret = ucsi_acknowledge_command(ucsi);
|
if (ret)
|
return ret;
|
|
ret = ucsi_exec_command(ucsi, UCSI_GET_ERROR_STATUS);
|
if (ret < 0)
|
return ret;
|
|
ret = ucsi->ops->read(ucsi, UCSI_MESSAGE_IN, &error, sizeof(error));
|
if (ret)
|
return ret;
|
|
ret = ucsi_acknowledge_command(ucsi);
|
if (ret)
|
return ret;
|
|
switch (error) {
|
case UCSI_ERROR_INCOMPATIBLE_PARTNER:
|
return -EOPNOTSUPP;
|
case UCSI_ERROR_CC_COMMUNICATION_ERR:
|
return -ECOMM;
|
case UCSI_ERROR_CONTRACT_NEGOTIATION_FAIL:
|
return -EPROTO;
|
case UCSI_ERROR_DEAD_BATTERY:
|
dev_warn(ucsi->dev, "Dead battery condition!\n");
|
return -EPERM;
|
case UCSI_ERROR_INVALID_CON_NUM:
|
case UCSI_ERROR_UNREGONIZED_CMD:
|
case UCSI_ERROR_INVALID_CMD_ARGUMENT:
|
dev_err(ucsi->dev, "possible UCSI driver bug %u\n", error);
|
return -EINVAL;
|
case UCSI_ERROR_OVERCURRENT:
|
dev_warn(ucsi->dev, "Overcurrent condition\n");
|
break;
|
case UCSI_ERROR_PARTNER_REJECTED_SWAP:
|
dev_warn(ucsi->dev, "Partner rejected swap\n");
|
break;
|
case UCSI_ERROR_HARD_RESET:
|
dev_warn(ucsi->dev, "Hard reset occurred\n");
|
break;
|
case UCSI_ERROR_PPM_POLICY_CONFLICT:
|
dev_warn(ucsi->dev, "PPM Policy conflict\n");
|
break;
|
case UCSI_ERROR_SWAP_REJECTED:
|
dev_warn(ucsi->dev, "Swap rejected\n");
|
break;
|
case UCSI_ERROR_UNDEFINED:
|
default:
|
dev_err(ucsi->dev, "unknown error %u\n", error);
|
break;
|
}
|
|
return -EIO;
|
}
|
|
static int ucsi_exec_command(struct ucsi *ucsi, u64 cmd)
|
{
|
u32 cci;
|
int ret;
|
|
ret = ucsi->ops->sync_write(ucsi, UCSI_CONTROL, &cmd, sizeof(cmd));
|
if (ret)
|
return ret;
|
|
ret = ucsi->ops->read(ucsi, UCSI_CCI, &cci, sizeof(cci));
|
if (ret)
|
return ret;
|
|
if (cci & UCSI_CCI_BUSY)
|
return -EBUSY;
|
|
if (!(cci & UCSI_CCI_COMMAND_COMPLETE))
|
return -EIO;
|
|
if (cci & UCSI_CCI_NOT_SUPPORTED)
|
return -EOPNOTSUPP;
|
|
if (cci & UCSI_CCI_ERROR) {
|
if (cmd == UCSI_GET_ERROR_STATUS)
|
return -EIO;
|
return ucsi_read_error(ucsi);
|
}
|
|
return UCSI_CCI_LENGTH(cci);
|
}
|
|
int ucsi_send_command(struct ucsi *ucsi, u64 command,
|
void *data, size_t size)
|
{
|
u8 length;
|
int ret;
|
|
mutex_lock(&ucsi->ppm_lock);
|
|
ret = ucsi_exec_command(ucsi, command);
|
if (ret < 0)
|
goto out;
|
|
length = ret;
|
|
if (data) {
|
ret = ucsi->ops->read(ucsi, UCSI_MESSAGE_IN, data, size);
|
if (ret)
|
goto out;
|
}
|
|
ret = ucsi_acknowledge_command(ucsi);
|
if (ret)
|
goto out;
|
|
ret = length;
|
out:
|
mutex_unlock(&ucsi->ppm_lock);
|
return ret;
|
}
|
EXPORT_SYMBOL_GPL(ucsi_send_command);
|
|
int ucsi_resume(struct ucsi *ucsi)
|
{
|
u64 command;
|
|
/* Restore UCSI notification enable mask after system resume */
|
command = UCSI_SET_NOTIFICATION_ENABLE | ucsi->ntfy;
|
|
return ucsi_send_command(ucsi, command, NULL, 0);
|
}
|
EXPORT_SYMBOL_GPL(ucsi_resume);
|
/* -------------------------------------------------------------------------- */
|
|
void ucsi_altmode_update_active(struct ucsi_connector *con)
|
{
|
const struct typec_altmode *altmode = NULL;
|
u64 command;
|
int ret;
|
u8 cur;
|
int i;
|
|
command = UCSI_GET_CURRENT_CAM | UCSI_CONNECTOR_NUMBER(con->num);
|
ret = ucsi_send_command(con->ucsi, command, &cur, sizeof(cur));
|
if (ret < 0) {
|
if (con->ucsi->version > 0x0100) {
|
dev_err(con->ucsi->dev,
|
"GET_CURRENT_CAM command failed\n");
|
return;
|
}
|
cur = 0xff;
|
}
|
|
if (cur < UCSI_MAX_ALTMODES)
|
altmode = typec_altmode_get_partner(con->port_altmode[cur]);
|
|
for (i = 0; con->partner_altmode[i]; i++)
|
typec_altmode_update_active(con->partner_altmode[i],
|
con->partner_altmode[i] == altmode);
|
}
|
|
static int ucsi_altmode_next_mode(struct typec_altmode **alt, u16 svid)
|
{
|
u8 mode = 1;
|
int i;
|
|
for (i = 0; alt[i]; i++) {
|
if (i > MODE_DISCOVERY_MAX)
|
return -ERANGE;
|
|
if (alt[i]->svid == svid)
|
mode++;
|
}
|
|
return mode;
|
}
|
|
static int ucsi_next_altmode(struct typec_altmode **alt)
|
{
|
int i = 0;
|
|
for (i = 0; i < UCSI_MAX_ALTMODES; i++)
|
if (!alt[i])
|
return i;
|
|
return -ENOENT;
|
}
|
|
static int ucsi_register_altmode(struct ucsi_connector *con,
|
struct typec_altmode_desc *desc,
|
u8 recipient)
|
{
|
struct typec_altmode *alt;
|
bool override;
|
int ret;
|
int i;
|
|
override = !!(con->ucsi->cap.features & UCSI_CAP_ALT_MODE_OVERRIDE);
|
|
switch (recipient) {
|
case UCSI_RECIPIENT_CON:
|
i = ucsi_next_altmode(con->port_altmode);
|
if (i < 0) {
|
ret = i;
|
goto err;
|
}
|
|
ret = ucsi_altmode_next_mode(con->port_altmode, desc->svid);
|
if (ret < 0)
|
return ret;
|
|
desc->mode = ret;
|
|
switch (desc->svid) {
|
case USB_TYPEC_DP_SID:
|
alt = ucsi_register_displayport(con, override, i, desc);
|
break;
|
case USB_TYPEC_NVIDIA_VLINK_SID:
|
if (desc->vdo == USB_TYPEC_NVIDIA_VLINK_DBG_VDO)
|
alt = typec_port_register_altmode(con->port,
|
desc);
|
else
|
alt = ucsi_register_displayport(con, override,
|
i, desc);
|
break;
|
default:
|
alt = typec_port_register_altmode(con->port, desc);
|
break;
|
}
|
|
if (IS_ERR(alt)) {
|
ret = PTR_ERR(alt);
|
goto err;
|
}
|
|
con->port_altmode[i] = alt;
|
break;
|
case UCSI_RECIPIENT_SOP:
|
i = ucsi_next_altmode(con->partner_altmode);
|
if (i < 0) {
|
ret = i;
|
goto err;
|
}
|
|
ret = ucsi_altmode_next_mode(con->partner_altmode, desc->svid);
|
if (ret < 0)
|
return ret;
|
|
desc->mode = ret;
|
|
alt = typec_partner_register_altmode(con->partner, desc);
|
if (IS_ERR(alt)) {
|
ret = PTR_ERR(alt);
|
goto err;
|
}
|
|
con->partner_altmode[i] = alt;
|
break;
|
default:
|
return -EINVAL;
|
}
|
|
trace_ucsi_register_altmode(recipient, alt);
|
|
return 0;
|
|
err:
|
dev_err(con->ucsi->dev, "failed to registers svid 0x%04x mode %d\n",
|
desc->svid, desc->mode);
|
|
return ret;
|
}
|
|
static int
|
ucsi_register_altmodes_nvidia(struct ucsi_connector *con, u8 recipient)
|
{
|
int max_altmodes = UCSI_MAX_ALTMODES;
|
struct typec_altmode_desc desc;
|
struct ucsi_altmode alt;
|
struct ucsi_altmode orig[UCSI_MAX_ALTMODES];
|
struct ucsi_altmode updated[UCSI_MAX_ALTMODES];
|
struct ucsi *ucsi = con->ucsi;
|
bool multi_dp = false;
|
u64 command;
|
int ret;
|
int len;
|
int i;
|
int k = 0;
|
|
if (recipient == UCSI_RECIPIENT_CON)
|
max_altmodes = con->ucsi->cap.num_alt_modes;
|
|
memset(orig, 0, sizeof(orig));
|
memset(updated, 0, sizeof(updated));
|
|
/* First get all the alternate modes */
|
for (i = 0; i < max_altmodes; i++) {
|
memset(&alt, 0, sizeof(alt));
|
command = UCSI_GET_ALTERNATE_MODES;
|
command |= UCSI_GET_ALTMODE_RECIPIENT(recipient);
|
command |= UCSI_GET_ALTMODE_CONNECTOR_NUMBER(con->num);
|
command |= UCSI_GET_ALTMODE_OFFSET(i);
|
len = ucsi_send_command(con->ucsi, command, &alt, sizeof(alt));
|
/*
|
* We are collecting all altmodes first and then registering.
|
* Some type-C device will return zero length data beyond last
|
* alternate modes. We should not return if length is zero.
|
*/
|
if (len < 0)
|
return len;
|
|
/* We got all altmodes, now break out and register them */
|
if (!len || !alt.svid)
|
break;
|
|
orig[k].mid = alt.mid;
|
orig[k].svid = alt.svid;
|
k++;
|
}
|
/*
|
* Update the original altmode table as some ppms may report
|
* multiple DP altmodes.
|
*/
|
if (recipient == UCSI_RECIPIENT_CON)
|
multi_dp = ucsi->ops->update_altmodes(ucsi, orig, updated);
|
|
/* now register altmodes */
|
for (i = 0; i < max_altmodes; i++) {
|
memset(&desc, 0, sizeof(desc));
|
if (multi_dp && recipient == UCSI_RECIPIENT_CON) {
|
desc.svid = updated[i].svid;
|
desc.vdo = updated[i].mid;
|
} else {
|
desc.svid = orig[i].svid;
|
desc.vdo = orig[i].mid;
|
}
|
desc.roles = TYPEC_PORT_DRD;
|
|
if (!desc.svid)
|
return 0;
|
|
ret = ucsi_register_altmode(con, &desc, recipient);
|
if (ret)
|
return ret;
|
}
|
|
return 0;
|
}
|
|
static int ucsi_register_altmodes(struct ucsi_connector *con, u8 recipient)
|
{
|
int max_altmodes = UCSI_MAX_ALTMODES;
|
struct typec_altmode_desc desc;
|
struct ucsi_altmode alt[2];
|
u64 command;
|
int num;
|
int ret;
|
int len;
|
int j;
|
int i;
|
|
if (!(con->ucsi->cap.features & UCSI_CAP_ALT_MODE_DETAILS))
|
return 0;
|
|
if (recipient == UCSI_RECIPIENT_SOP && con->partner_altmode[0])
|
return 0;
|
|
if (con->ucsi->ops->update_altmodes)
|
return ucsi_register_altmodes_nvidia(con, recipient);
|
|
if (recipient == UCSI_RECIPIENT_CON)
|
max_altmodes = con->ucsi->cap.num_alt_modes;
|
|
for (i = 0; i < max_altmodes;) {
|
memset(alt, 0, sizeof(alt));
|
command = UCSI_GET_ALTERNATE_MODES;
|
command |= UCSI_GET_ALTMODE_RECIPIENT(recipient);
|
command |= UCSI_GET_ALTMODE_CONNECTOR_NUMBER(con->num);
|
command |= UCSI_GET_ALTMODE_OFFSET(i);
|
len = ucsi_send_command(con->ucsi, command, alt, sizeof(alt));
|
if (len <= 0)
|
return len;
|
|
/*
|
* This code is requesting one alt mode at a time, but some PPMs
|
* may still return two. If that happens both alt modes need be
|
* registered and the offset for the next alt mode has to be
|
* incremented.
|
*/
|
num = len / sizeof(alt[0]);
|
i += num;
|
|
for (j = 0; j < num; j++) {
|
if (!alt[j].svid)
|
return 0;
|
|
memset(&desc, 0, sizeof(desc));
|
desc.vdo = alt[j].mid;
|
desc.svid = alt[j].svid;
|
desc.roles = TYPEC_PORT_DRD;
|
|
ret = ucsi_register_altmode(con, &desc, recipient);
|
if (ret)
|
return ret;
|
}
|
}
|
|
return 0;
|
}
|
|
static void ucsi_unregister_altmodes(struct ucsi_connector *con, u8 recipient)
|
{
|
const struct typec_altmode *pdev;
|
struct typec_altmode **adev;
|
int i = 0;
|
|
switch (recipient) {
|
case UCSI_RECIPIENT_CON:
|
adev = con->port_altmode;
|
break;
|
case UCSI_RECIPIENT_SOP:
|
adev = con->partner_altmode;
|
break;
|
default:
|
return;
|
}
|
|
while (adev[i]) {
|
if (recipient == UCSI_RECIPIENT_SOP &&
|
(adev[i]->svid == USB_TYPEC_DP_SID ||
|
(adev[i]->svid == USB_TYPEC_NVIDIA_VLINK_SID &&
|
adev[i]->vdo != USB_TYPEC_NVIDIA_VLINK_DBG_VDO))) {
|
pdev = typec_altmode_get_partner(adev[i]);
|
ucsi_displayport_remove_partner((void *)pdev);
|
}
|
typec_unregister_altmode(adev[i]);
|
adev[i++] = NULL;
|
}
|
}
|
|
static int ucsi_get_pdos(struct ucsi_connector *con, int is_partner,
|
u32 *pdos, int offset, int num_pdos)
|
{
|
struct ucsi *ucsi = con->ucsi;
|
u64 command;
|
int ret;
|
|
command = UCSI_COMMAND(UCSI_GET_PDOS) | UCSI_CONNECTOR_NUMBER(con->num);
|
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;
|
ret = ucsi_send_command(ucsi, command, pdos + offset,
|
num_pdos * sizeof(u32));
|
if (ret < 0)
|
dev_err(ucsi->dev, "UCSI_GET_PDOS failed (%d)\n", ret);
|
|
return ret;
|
}
|
|
static void ucsi_get_src_pdos(struct ucsi_connector *con, int is_partner)
|
{
|
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);
|
if (ret < 0)
|
return;
|
|
con->num_pdos = ret / sizeof(u32); /* number of bytes to 32-bit PDOs */
|
if (con->num_pdos < UCSI_MAX_PDOS)
|
return;
|
|
/* get the remaining PDOs, if any */
|
ret = ucsi_get_pdos(con, 1, con->src_pdos, UCSI_MAX_PDOS,
|
PDO_MAX_OBJECTS - UCSI_MAX_PDOS);
|
if (ret < 0)
|
return;
|
|
con->num_pdos += ret / sizeof(u32);
|
}
|
|
static void ucsi_pwr_opmode_change(struct ucsi_connector *con)
|
{
|
switch (UCSI_CONSTAT_PWR_OPMODE(con->status.flags)) {
|
case UCSI_CONSTAT_PWR_OPMODE_PD:
|
con->rdo = con->status.request_data_obj;
|
typec_set_pwr_opmode(con->port, TYPEC_PWR_MODE_PD);
|
ucsi_get_src_pdos(con, 1);
|
break;
|
case UCSI_CONSTAT_PWR_OPMODE_TYPEC1_5:
|
con->rdo = 0;
|
typec_set_pwr_opmode(con->port, TYPEC_PWR_MODE_1_5A);
|
break;
|
case UCSI_CONSTAT_PWR_OPMODE_TYPEC3_0:
|
con->rdo = 0;
|
typec_set_pwr_opmode(con->port, TYPEC_PWR_MODE_3_0A);
|
break;
|
default:
|
con->rdo = 0;
|
typec_set_pwr_opmode(con->port, TYPEC_PWR_MODE_USB);
|
break;
|
}
|
}
|
|
static int ucsi_register_partner(struct ucsi_connector *con)
|
{
|
u8 pwr_opmode = UCSI_CONSTAT_PWR_OPMODE(con->status.flags);
|
struct typec_partner_desc desc;
|
struct typec_partner *partner;
|
|
if (con->partner)
|
return 0;
|
|
memset(&desc, 0, sizeof(desc));
|
|
switch (UCSI_CONSTAT_PARTNER_TYPE(con->status.flags)) {
|
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 = pwr_opmode == 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;
|
|
ucsi_unregister_altmodes(con, UCSI_RECIPIENT_SOP);
|
typec_unregister_partner(con->partner);
|
con->partner = NULL;
|
}
|
|
static void ucsi_partner_change(struct ucsi_connector *con)
|
{
|
enum usb_role u_role = USB_ROLE_NONE;
|
int ret;
|
|
if (!con->partner)
|
return;
|
|
switch (UCSI_CONSTAT_PARTNER_TYPE(con->status.flags)) {
|
case UCSI_CONSTAT_PARTNER_TYPE_UFP:
|
case UCSI_CONSTAT_PARTNER_TYPE_CABLE_AND_UFP:
|
u_role = USB_ROLE_HOST;
|
fallthrough;
|
case UCSI_CONSTAT_PARTNER_TYPE_CABLE:
|
typec_set_data_role(con->port, TYPEC_HOST);
|
break;
|
case UCSI_CONSTAT_PARTNER_TYPE_DFP:
|
u_role = USB_ROLE_DEVICE;
|
typec_set_data_role(con->port, TYPEC_DEVICE);
|
break;
|
default:
|
break;
|
}
|
|
/* Complete pending data role swap */
|
if (!completion_done(&con->complete))
|
complete(&con->complete);
|
|
/* Only notify USB controller if partner supports USB data */
|
if (!(UCSI_CONSTAT_PARTNER_FLAGS(con->status.flags) & UCSI_CONSTAT_PARTNER_FLAG_USB))
|
u_role = USB_ROLE_NONE;
|
|
ret = usb_role_switch_set_role(con->usb_role_sw, u_role);
|
if (ret)
|
dev_err(con->ucsi->dev, "con:%d: failed to set usb role:%d\n",
|
con->num, u_role);
|
|
/* Can't rely on Partner Flags field. Always checking the alt modes. */
|
ret = ucsi_register_altmodes(con, UCSI_RECIPIENT_SOP);
|
if (ret)
|
dev_err(con->ucsi->dev,
|
"con%d: failed to register partner alternate modes\n",
|
con->num);
|
else
|
ucsi_altmode_update_active(con);
|
}
|
|
static void ucsi_handle_connector_change(struct work_struct *work)
|
{
|
struct ucsi_connector *con = container_of(work, struct ucsi_connector,
|
work);
|
struct ucsi *ucsi = con->ucsi;
|
struct ucsi_connector_status pre_ack_status;
|
struct ucsi_connector_status post_ack_status;
|
enum typec_role role;
|
enum usb_role u_role = USB_ROLE_NONE;
|
u16 inferred_changes;
|
u16 changed_flags;
|
u64 command;
|
int ret;
|
|
mutex_lock(&con->lock);
|
|
/*
|
* Some/many PPMs have an issue where all fields in the change bitfield
|
* are cleared when an ACK is send. This will causes any change
|
* between GET_CONNECTOR_STATUS and ACK to be lost.
|
*
|
* We work around this by re-fetching the connector status afterwards.
|
* We then infer any changes that we see have happened but that may not
|
* be represented in the change bitfield.
|
*
|
* Also, even though we don't need to know the currently supported alt
|
* modes, we run the GET_CAM_SUPPORTED command to ensure the PPM does
|
* not get stuck in case it assumes we do.
|
* Always do this, rather than relying on UCSI_CONSTAT_CAM_CHANGE to be
|
* set in the change bitfield.
|
*
|
* We end up with the following actions:
|
* 1. UCSI_GET_CONNECTOR_STATUS, store result, update unprocessed_changes
|
* 2. UCSI_GET_CAM_SUPPORTED, discard result
|
* 3. ACK connector change
|
* 4. UCSI_GET_CONNECTOR_STATUS, store result
|
* 5. Infere lost changes by comparing UCSI_GET_CONNECTOR_STATUS results
|
* 6. If PPM reported a new change, then restart in order to ACK
|
* 7. Process everything as usual.
|
*
|
* We may end up seeing a change twice, but we can only miss extremely
|
* short transitional changes.
|
*/
|
|
/* 1. First UCSI_GET_CONNECTOR_STATUS */
|
command = UCSI_GET_CONNECTOR_STATUS | UCSI_CONNECTOR_NUMBER(con->num);
|
ret = ucsi_send_command(ucsi, command, &pre_ack_status,
|
sizeof(pre_ack_status));
|
if (ret < 0) {
|
dev_err(ucsi->dev, "%s: GET_CONNECTOR_STATUS failed (%d)\n",
|
__func__, ret);
|
goto out_unlock;
|
}
|
con->unprocessed_changes |= pre_ack_status.change;
|
|
/* 2. Run UCSI_GET_CAM_SUPPORTED and discard the result. */
|
command = UCSI_GET_CAM_SUPPORTED;
|
command |= UCSI_CONNECTOR_NUMBER(con->num);
|
ucsi_send_command(con->ucsi, command, NULL, 0);
|
|
/* 3. ACK connector change */
|
ret = ucsi_acknowledge_connector_change(ucsi);
|
clear_bit(EVENT_PENDING, &ucsi->flags);
|
if (ret) {
|
dev_err(ucsi->dev, "%s: ACK failed (%d)", __func__, ret);
|
goto out_unlock;
|
}
|
|
/* 4. Second UCSI_GET_CONNECTOR_STATUS */
|
command = UCSI_GET_CONNECTOR_STATUS | UCSI_CONNECTOR_NUMBER(con->num);
|
ret = ucsi_send_command(ucsi, command, &post_ack_status,
|
sizeof(post_ack_status));
|
if (ret < 0) {
|
dev_err(ucsi->dev, "%s: GET_CONNECTOR_STATUS failed (%d)\n",
|
__func__, ret);
|
goto out_unlock;
|
}
|
|
/* 5. Inferre any missing changes */
|
changed_flags = pre_ack_status.flags ^ post_ack_status.flags;
|
inferred_changes = 0;
|
if (UCSI_CONSTAT_PWR_OPMODE(changed_flags) != 0)
|
inferred_changes |= UCSI_CONSTAT_POWER_OPMODE_CHANGE;
|
|
if (changed_flags & UCSI_CONSTAT_CONNECTED)
|
inferred_changes |= UCSI_CONSTAT_CONNECT_CHANGE;
|
|
if (changed_flags & UCSI_CONSTAT_PWR_DIR)
|
inferred_changes |= UCSI_CONSTAT_POWER_DIR_CHANGE;
|
|
if (UCSI_CONSTAT_PARTNER_FLAGS(changed_flags) != 0)
|
inferred_changes |= UCSI_CONSTAT_PARTNER_CHANGE;
|
|
if (UCSI_CONSTAT_PARTNER_TYPE(changed_flags) != 0)
|
inferred_changes |= UCSI_CONSTAT_PARTNER_CHANGE;
|
|
/* Mask out anything that was correctly notified in the later call. */
|
inferred_changes &= ~post_ack_status.change;
|
if (inferred_changes)
|
dev_dbg(ucsi->dev, "%s: Inferred changes that would have been lost: 0x%04x\n",
|
__func__, inferred_changes);
|
|
con->unprocessed_changes |= inferred_changes;
|
|
/* 6. If PPM reported a new change, then restart in order to ACK */
|
if (post_ack_status.change)
|
goto out_unlock;
|
|
/* 7. Continue as if nothing happened */
|
con->status = post_ack_status;
|
con->status.change = con->unprocessed_changes;
|
con->unprocessed_changes = 0;
|
|
role = !!(con->status.flags & UCSI_CONSTAT_PWR_DIR);
|
|
if (con->status.change & UCSI_CONSTAT_POWER_OPMODE_CHANGE ||
|
con->status.change & UCSI_CONSTAT_POWER_LEVEL_CHANGE) {
|
ucsi_pwr_opmode_change(con);
|
ucsi_port_psy_changed(con);
|
}
|
|
if (con->status.change & UCSI_CONSTAT_POWER_DIR_CHANGE) {
|
typec_set_pwr_role(con->port, role);
|
|
/* Complete pending power role swap */
|
if (!completion_done(&con->complete))
|
complete(&con->complete);
|
}
|
|
if (con->status.change & UCSI_CONSTAT_CONNECT_CHANGE) {
|
typec_set_pwr_role(con->port, role);
|
|
switch (UCSI_CONSTAT_PARTNER_TYPE(con->status.flags)) {
|
case UCSI_CONSTAT_PARTNER_TYPE_UFP:
|
case UCSI_CONSTAT_PARTNER_TYPE_CABLE_AND_UFP:
|
u_role = USB_ROLE_HOST;
|
fallthrough;
|
case UCSI_CONSTAT_PARTNER_TYPE_CABLE:
|
typec_set_data_role(con->port, TYPEC_HOST);
|
break;
|
case UCSI_CONSTAT_PARTNER_TYPE_DFP:
|
u_role = USB_ROLE_DEVICE;
|
typec_set_data_role(con->port, TYPEC_DEVICE);
|
break;
|
default:
|
break;
|
}
|
|
if (con->status.flags & UCSI_CONSTAT_CONNECTED)
|
ucsi_register_partner(con);
|
else
|
ucsi_unregister_partner(con);
|
|
ucsi_port_psy_changed(con);
|
|
/* Only notify USB controller if partner supports USB data */
|
if (!(UCSI_CONSTAT_PARTNER_FLAGS(con->status.flags) &
|
UCSI_CONSTAT_PARTNER_FLAG_USB))
|
u_role = USB_ROLE_NONE;
|
|
ret = usb_role_switch_set_role(con->usb_role_sw, u_role);
|
if (ret)
|
dev_err(ucsi->dev, "con:%d: failed to set usb role:%d\n",
|
con->num, u_role);
|
}
|
|
if (con->status.change & UCSI_CONSTAT_PARTNER_CHANGE)
|
ucsi_partner_change(con);
|
|
trace_ucsi_connector_change(con->num, &con->status);
|
|
out_unlock:
|
if (test_and_clear_bit(EVENT_PENDING, &ucsi->flags)) {
|
schedule_work(&con->work);
|
mutex_unlock(&con->lock);
|
return;
|
}
|
|
clear_bit(EVENT_PROCESSING, &ucsi->flags);
|
mutex_unlock(&con->lock);
|
}
|
|
/**
|
* ucsi_connector_change - Process Connector Change Event
|
* @ucsi: UCSI Interface
|
* @num: Connector number
|
*/
|
void ucsi_connector_change(struct ucsi *ucsi, u8 num)
|
{
|
struct ucsi_connector *con = &ucsi->connector[num - 1];
|
|
if (!(ucsi->ntfy & UCSI_ENABLE_NTFY_CONNECTOR_CHANGE)) {
|
dev_dbg(ucsi->dev, "Bogus connector change event\n");
|
return;
|
}
|
|
set_bit(EVENT_PENDING, &ucsi->flags);
|
|
if (!test_and_set_bit(EVENT_PROCESSING, &ucsi->flags))
|
schedule_work(&con->work);
|
}
|
EXPORT_SYMBOL_GPL(ucsi_connector_change);
|
|
/* -------------------------------------------------------------------------- */
|
|
static int ucsi_reset_connector(struct ucsi_connector *con, bool hard)
|
{
|
u64 command;
|
|
command = UCSI_CONNECTOR_RESET | UCSI_CONNECTOR_NUMBER(con->num);
|
command |= hard ? UCSI_CONNECTOR_RESET_HARD : 0;
|
|
return ucsi_send_command(con->ucsi, command, NULL, 0);
|
}
|
|
static int ucsi_reset_ppm(struct ucsi *ucsi)
|
{
|
u64 command = UCSI_PPM_RESET;
|
unsigned long tmo;
|
u32 cci;
|
int ret;
|
|
mutex_lock(&ucsi->ppm_lock);
|
|
ret = ucsi->ops->async_write(ucsi, UCSI_CONTROL, &command,
|
sizeof(command));
|
if (ret < 0)
|
goto out;
|
|
tmo = jiffies + msecs_to_jiffies(UCSI_TIMEOUT_MS);
|
|
do {
|
if (time_is_before_jiffies(tmo)) {
|
ret = -ETIMEDOUT;
|
goto out;
|
}
|
|
ret = ucsi->ops->read(ucsi, UCSI_CCI, &cci, sizeof(cci));
|
if (ret)
|
goto out;
|
|
/* If the PPM is still doing something else, reset it again. */
|
if (cci & ~UCSI_CCI_RESET_COMPLETE) {
|
ret = ucsi->ops->async_write(ucsi, UCSI_CONTROL,
|
&command,
|
sizeof(command));
|
if (ret < 0)
|
goto out;
|
}
|
|
msleep(20);
|
} while (!(cci & UCSI_CCI_RESET_COMPLETE));
|
|
out:
|
mutex_unlock(&ucsi->ppm_lock);
|
return ret;
|
}
|
|
static int ucsi_role_cmd(struct ucsi_connector *con, u64 command)
|
{
|
int ret;
|
|
ret = ucsi_send_command(con->ucsi, command, NULL, 0);
|
if (ret == -ETIMEDOUT) {
|
u64 c;
|
|
/* PPM most likely stopped responding. Resetting everything. */
|
ucsi_reset_ppm(con->ucsi);
|
|
c = UCSI_SET_NOTIFICATION_ENABLE | con->ucsi->ntfy;
|
ucsi_send_command(con->ucsi, c, NULL, 0);
|
|
ucsi_reset_connector(con, true);
|
}
|
|
return ret;
|
}
|
|
static int ucsi_dr_swap(struct typec_port *port, enum typec_data_role role)
|
{
|
struct ucsi_connector *con = typec_get_drvdata(port);
|
u8 partner_type;
|
u64 command;
|
int ret = 0;
|
|
mutex_lock(&con->lock);
|
|
if (!con->partner) {
|
ret = -ENOTCONN;
|
goto out_unlock;
|
}
|
|
partner_type = UCSI_CONSTAT_PARTNER_TYPE(con->status.flags);
|
if ((partner_type == UCSI_CONSTAT_PARTNER_TYPE_DFP &&
|
role == TYPEC_DEVICE) ||
|
(partner_type == UCSI_CONSTAT_PARTNER_TYPE_UFP &&
|
role == TYPEC_HOST))
|
goto out_unlock;
|
|
reinit_completion(&con->complete);
|
|
command = UCSI_SET_UOR | UCSI_CONNECTOR_NUMBER(con->num);
|
command |= UCSI_SET_UOR_ROLE(role);
|
command |= UCSI_SET_UOR_ACCEPT_ROLE_SWAPS;
|
ret = ucsi_role_cmd(con, command);
|
if (ret < 0)
|
goto out_unlock;
|
|
mutex_unlock(&con->lock);
|
|
if (!wait_for_completion_timeout(&con->complete,
|
msecs_to_jiffies(UCSI_SWAP_TIMEOUT_MS)))
|
return -ETIMEDOUT;
|
|
return 0;
|
|
out_unlock:
|
mutex_unlock(&con->lock);
|
|
return ret;
|
}
|
|
static int ucsi_pr_swap(struct typec_port *port, enum typec_role role)
|
{
|
struct ucsi_connector *con = typec_get_drvdata(port);
|
enum typec_role cur_role;
|
u64 command;
|
int ret = 0;
|
|
mutex_lock(&con->lock);
|
|
if (!con->partner) {
|
ret = -ENOTCONN;
|
goto out_unlock;
|
}
|
|
cur_role = !!(con->status.flags & UCSI_CONSTAT_PWR_DIR);
|
|
if (cur_role == role)
|
goto out_unlock;
|
|
reinit_completion(&con->complete);
|
|
command = UCSI_SET_PDR | UCSI_CONNECTOR_NUMBER(con->num);
|
command |= UCSI_SET_PDR_ROLE(role);
|
command |= UCSI_SET_PDR_ACCEPT_ROLE_SWAPS;
|
ret = ucsi_role_cmd(con, command);
|
if (ret < 0)
|
goto out_unlock;
|
|
mutex_unlock(&con->lock);
|
|
if (!wait_for_completion_timeout(&con->complete,
|
msecs_to_jiffies(UCSI_SWAP_TIMEOUT_MS)))
|
return -ETIMEDOUT;
|
|
mutex_lock(&con->lock);
|
|
/* Something has gone wrong while swapping the role */
|
if (UCSI_CONSTAT_PWR_OPMODE(con->status.flags) !=
|
UCSI_CONSTAT_PWR_OPMODE_PD) {
|
ucsi_reset_connector(con, true);
|
ret = -EPROTO;
|
}
|
|
out_unlock:
|
mutex_unlock(&con->lock);
|
|
return ret;
|
}
|
|
static const struct typec_operations ucsi_ops = {
|
.dr_set = ucsi_dr_swap,
|
.pr_set = ucsi_pr_swap
|
};
|
|
/* Caller must call fwnode_handle_put() after use */
|
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;
|
enum usb_role u_role = USB_ROLE_NONE;
|
u64 command;
|
int ret;
|
|
INIT_WORK(&con->work, ucsi_handle_connector_change);
|
init_completion(&con->complete);
|
mutex_init(&con->lock);
|
con->num = index + 1;
|
con->ucsi = ucsi;
|
|
cap->fwnode = ucsi_find_fwnode(con);
|
con->usb_role_sw = fwnode_usb_role_switch_get(cap->fwnode);
|
if (IS_ERR(con->usb_role_sw)) {
|
dev_err(ucsi->dev, "con%d: failed to get usb role switch\n",
|
con->num);
|
return PTR_ERR(con->usb_role_sw);
|
}
|
|
|
/* Delay other interactions with the con until registration is complete */
|
mutex_lock(&con->lock);
|
|
/* Get connector capability */
|
command = UCSI_GET_CONNECTOR_CAPABILITY;
|
command |= UCSI_CONNECTOR_NUMBER(con->num);
|
ret = ucsi_send_command(ucsi, command, &con->cap, sizeof(con->cap));
|
if (ret < 0)
|
goto out_unlock;
|
|
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.flags & UCSI_CONCAP_FLAG_PROVIDER) &&
|
(con->cap.flags & UCSI_CONCAP_FLAG_CONSUMER))
|
cap->type = TYPEC_PORT_DRP;
|
else if (con->cap.flags & UCSI_CONCAP_FLAG_PROVIDER)
|
cap->type = TYPEC_PORT_SRC;
|
else if (con->cap.flags & UCSI_CONCAP_FLAG_CONSUMER)
|
cap->type = TYPEC_PORT_SNK;
|
|
cap->revision = ucsi->cap.typec_version;
|
cap->pd_revision = ucsi->cap.pd_version;
|
cap->svdm_version = SVDM_VER_2_0;
|
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->driver_data = con;
|
cap->ops = &ucsi_ops;
|
|
ret = ucsi_register_port_psy(con);
|
if (ret)
|
goto out;
|
|
/* Register the connector */
|
con->port = typec_register_port(ucsi->dev, cap);
|
if (IS_ERR(con->port)) {
|
ret = PTR_ERR(con->port);
|
goto out;
|
}
|
|
/* Alternate modes */
|
ret = ucsi_register_altmodes(con, UCSI_RECIPIENT_CON);
|
if (ret) {
|
dev_err(ucsi->dev, "con%d: failed to register alt modes\n",
|
con->num);
|
goto out;
|
}
|
|
/* Get the status */
|
command = UCSI_GET_CONNECTOR_STATUS | UCSI_CONNECTOR_NUMBER(con->num);
|
ret = ucsi_send_command(ucsi, command, &con->status, sizeof(con->status));
|
if (ret < 0) {
|
dev_err(ucsi->dev, "con%d: failed to get status\n", con->num);
|
ret = 0;
|
goto out;
|
}
|
ret = 0; /* ucsi_send_command() returns length on success */
|
|
switch (UCSI_CONSTAT_PARTNER_TYPE(con->status.flags)) {
|
case UCSI_CONSTAT_PARTNER_TYPE_UFP:
|
case UCSI_CONSTAT_PARTNER_TYPE_CABLE_AND_UFP:
|
u_role = USB_ROLE_HOST;
|
fallthrough;
|
case UCSI_CONSTAT_PARTNER_TYPE_CABLE:
|
typec_set_data_role(con->port, TYPEC_HOST);
|
break;
|
case UCSI_CONSTAT_PARTNER_TYPE_DFP:
|
u_role = USB_ROLE_DEVICE;
|
typec_set_data_role(con->port, TYPEC_DEVICE);
|
break;
|
default:
|
break;
|
}
|
|
/* Check if there is already something connected */
|
if (con->status.flags & UCSI_CONSTAT_CONNECTED) {
|
typec_set_pwr_role(con->port,
|
!!(con->status.flags & UCSI_CONSTAT_PWR_DIR));
|
ucsi_pwr_opmode_change(con);
|
ucsi_register_partner(con);
|
ucsi_port_psy_changed(con);
|
}
|
|
/* Only notify USB controller if partner supports USB data */
|
if (!(UCSI_CONSTAT_PARTNER_FLAGS(con->status.flags) & UCSI_CONSTAT_PARTNER_FLAG_USB))
|
u_role = USB_ROLE_NONE;
|
|
ret = usb_role_switch_set_role(con->usb_role_sw, u_role);
|
if (ret) {
|
dev_err(ucsi->dev, "con:%d: failed to set usb role:%d\n",
|
con->num, u_role);
|
ret = 0;
|
}
|
|
if (con->partner) {
|
ret = ucsi_register_altmodes(con, UCSI_RECIPIENT_SOP);
|
if (ret) {
|
dev_err(ucsi->dev,
|
"con%d: failed to register alternate modes\n",
|
con->num);
|
ret = 0;
|
} else {
|
ucsi_altmode_update_active(con);
|
}
|
}
|
|
trace_ucsi_register_port(con->num, &con->status);
|
|
out:
|
fwnode_handle_put(cap->fwnode);
|
out_unlock:
|
mutex_unlock(&con->lock);
|
return ret;
|
}
|
|
/**
|
* ucsi_init - Initialize UCSI interface
|
* @ucsi: UCSI to be initialized
|
*
|
* Registers all ports @ucsi has and enables all notification events.
|
*/
|
static int ucsi_init(struct ucsi *ucsi)
|
{
|
struct ucsi_connector *con;
|
u64 command, ntfy;
|
int ret;
|
int i;
|
|
/* Reset the PPM */
|
ret = ucsi_reset_ppm(ucsi);
|
if (ret) {
|
dev_err(ucsi->dev, "failed to reset PPM!\n");
|
goto err;
|
}
|
|
/* Enable basic notifications */
|
ntfy = UCSI_ENABLE_NTFY_CMD_COMPLETE | UCSI_ENABLE_NTFY_ERROR;
|
command = UCSI_SET_NOTIFICATION_ENABLE | ntfy;
|
ret = ucsi_send_command(ucsi, command, NULL, 0);
|
if (ret < 0)
|
goto err_reset;
|
|
/* Get PPM capabilities */
|
command = UCSI_GET_CAPABILITY;
|
ret = ucsi_send_command(ucsi, command, &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 */
|
ntfy = UCSI_ENABLE_NTFY_ALL;
|
command = UCSI_SET_NOTIFICATION_ENABLE | ntfy;
|
ret = ucsi_send_command(ucsi, command, NULL, 0);
|
if (ret < 0)
|
goto err_unregister;
|
|
ucsi->ntfy = ntfy;
|
return 0;
|
|
err_unregister:
|
for (con = ucsi->connector; con->port; con++) {
|
ucsi_unregister_partner(con);
|
ucsi_unregister_altmodes(con, UCSI_RECIPIENT_CON);
|
ucsi_unregister_port_psy(con);
|
typec_unregister_port(con->port);
|
con->port = NULL;
|
}
|
|
err_reset:
|
memset(&ucsi->cap, 0, sizeof(ucsi->cap));
|
ucsi_reset_ppm(ucsi);
|
err:
|
return ret;
|
}
|
|
static void ucsi_init_work(struct work_struct *work)
|
{
|
struct ucsi_android *aucsi = container_of(work,
|
struct ucsi_android, work.work);
|
int ret;
|
|
ret = ucsi_init(&aucsi->ucsi);
|
if (ret)
|
dev_err(aucsi->ucsi.dev, "PPM init failed (%d)\n", ret);
|
|
if (ret == -EPROBE_DEFER) {
|
if (aucsi->work_count++ > UCSI_ROLE_SWITCH_WAIT_COUNT)
|
return;
|
|
queue_delayed_work(system_long_wq, &aucsi->work,
|
UCSI_ROLE_SWITCH_INTERVAL);
|
}
|
}
|
|
/**
|
* ucsi_get_drvdata - Return private driver data pointer
|
* @ucsi: UCSI interface
|
*/
|
void *ucsi_get_drvdata(struct ucsi *ucsi)
|
{
|
return ucsi->driver_data;
|
}
|
EXPORT_SYMBOL_GPL(ucsi_get_drvdata);
|
|
/**
|
* ucsi_get_drvdata - Assign private driver data pointer
|
* @ucsi: UCSI interface
|
* @data: Private data pointer
|
*/
|
void ucsi_set_drvdata(struct ucsi *ucsi, void *data)
|
{
|
ucsi->driver_data = data;
|
}
|
EXPORT_SYMBOL_GPL(ucsi_set_drvdata);
|
|
/**
|
* ucsi_create - Allocate UCSI instance
|
* @dev: Device interface to the PPM (Platform Policy Manager)
|
* @ops: I/O routines
|
*/
|
struct ucsi *ucsi_create(struct device *dev, const struct ucsi_operations *ops)
|
{
|
struct ucsi *ucsi;
|
struct ucsi_android *aucsi;
|
|
if (!ops || !ops->read || !ops->sync_write || !ops->async_write)
|
return ERR_PTR(-EINVAL);
|
|
aucsi = kzalloc(sizeof(*aucsi), GFP_KERNEL);
|
if (!aucsi)
|
return ERR_PTR(-ENOMEM);
|
|
ucsi = &aucsi->ucsi;
|
INIT_DELAYED_WORK(&aucsi->work, ucsi_init_work);
|
mutex_init(&ucsi->ppm_lock);
|
ucsi->dev = dev;
|
ucsi->ops = ops;
|
|
return ucsi;
|
}
|
EXPORT_SYMBOL_GPL(ucsi_create);
|
|
/**
|
* ucsi_destroy - Free UCSI instance
|
* @ucsi: UCSI instance to be freed
|
*/
|
void ucsi_destroy(struct ucsi *ucsi)
|
{
|
struct ucsi_android *aucsi = container_of(ucsi,
|
struct ucsi_android, ucsi);
|
kfree(aucsi);
|
}
|
EXPORT_SYMBOL_GPL(ucsi_destroy);
|
|
/**
|
* ucsi_register - Register UCSI interface
|
* @ucsi: UCSI instance
|
*/
|
int ucsi_register(struct ucsi *ucsi)
|
{
|
struct ucsi_android *aucsi = container_of(ucsi,
|
struct ucsi_android, ucsi);
|
int ret;
|
|
ret = ucsi->ops->read(ucsi, UCSI_VERSION, &ucsi->version,
|
sizeof(ucsi->version));
|
if (ret)
|
return ret;
|
|
if (!ucsi->version)
|
return -ENODEV;
|
|
queue_delayed_work(system_long_wq, &aucsi->work, 0);
|
|
return 0;
|
}
|
EXPORT_SYMBOL_GPL(ucsi_register);
|
|
/**
|
* ucsi_unregister - Unregister UCSI interface
|
* @ucsi: UCSI interface to be unregistered
|
*
|
* Unregister UCSI interface that was created with ucsi_register().
|
*/
|
void ucsi_unregister(struct ucsi *ucsi)
|
{
|
struct ucsi_android *aucsi = container_of(ucsi,
|
struct ucsi_android, ucsi);
|
u64 cmd = UCSI_SET_NOTIFICATION_ENABLE;
|
int i;
|
|
/* Make sure that we are not in the middle of driver initialization */
|
cancel_delayed_work_sync(&aucsi->work);
|
|
/* Disable notifications */
|
ucsi->ops->async_write(ucsi, UCSI_CONTROL, &cmd, sizeof(cmd));
|
|
for (i = 0; i < ucsi->cap.num_connectors; i++) {
|
cancel_work_sync(&ucsi->connector[i].work);
|
ucsi_unregister_partner(&ucsi->connector[i]);
|
ucsi_unregister_altmodes(&ucsi->connector[i],
|
UCSI_RECIPIENT_CON);
|
ucsi_unregister_port_psy(&ucsi->connector[i]);
|
typec_unregister_port(ucsi->connector[i].port);
|
}
|
|
kfree(ucsi->connector);
|
}
|
EXPORT_SYMBOL_GPL(ucsi_unregister);
|
|
MODULE_AUTHOR("Heikki Krogerus <heikki.krogerus@linux.intel.com>");
|
MODULE_LICENSE("GPL v2");
|
MODULE_DESCRIPTION("USB Type-C Connector System Software Interface driver");
|
